/src/binutils-gdb/bfd/elf64-ppc.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* PowerPC64-specific support for 64-bit ELF. |
2 | | Copyright (C) 1999-2025 Free Software Foundation, Inc. |
3 | | Written by Linus Nordberg, Swox AB <info@swox.com>, |
4 | | based on elf32-ppc.c by Ian Lance Taylor. |
5 | | Largely rewritten by Alan Modra. |
6 | | |
7 | | This file is part of BFD, the Binary File Descriptor library. |
8 | | |
9 | | This program is free software; you can redistribute it and/or modify |
10 | | it under the terms of the GNU General Public License as published by |
11 | | the Free Software Foundation; either version 3 of the License, or |
12 | | (at your option) any later version. |
13 | | |
14 | | This program is distributed in the hope that it will be useful, |
15 | | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | | GNU General Public License for more details. |
18 | | |
19 | | You should have received a copy of the GNU General Public License along |
20 | | with this program; if not, write to the Free Software Foundation, Inc., |
21 | | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
22 | | |
23 | | |
24 | | /* The 64-bit PowerPC ELF ABI may be found at |
25 | | http://www.linuxbase.org/spec/ELF/ppc64/PPC-elf64abi.txt, and |
26 | | http://www.linuxbase.org/spec/ELF/ppc64/spec/book1.html */ |
27 | | |
28 | | /* The assembler should generate a full set of section symbols even |
29 | | when they appear unused. The linux kernel build tool recordmcount |
30 | | needs them. */ |
31 | | #define TARGET_KEEP_UNUSED_SECTION_SYMBOLS true |
32 | | |
33 | | #include "sysdep.h" |
34 | | #include <stdarg.h> |
35 | | #include "bfd.h" |
36 | | #include "bfdlink.h" |
37 | | #include "libbfd.h" |
38 | | #include "elf-bfd.h" |
39 | | #include "elf/ppc64.h" |
40 | | #include "elf64-ppc.h" |
41 | | #include "dwarf2.h" |
42 | | |
43 | | /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */ |
44 | 34 | #define OCTETS_PER_BYTE(ABFD, SEC) 1 |
45 | | |
46 | | static bfd_reloc_status_type ppc64_elf_ha_reloc |
47 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
48 | | static bfd_reloc_status_type ppc64_elf_branch_reloc |
49 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
50 | | static bfd_reloc_status_type ppc64_elf_brtaken_reloc |
51 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
52 | | static bfd_reloc_status_type ppc64_elf_sectoff_reloc |
53 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
54 | | static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc |
55 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
56 | | static bfd_reloc_status_type ppc64_elf_toc_reloc |
57 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
58 | | static bfd_reloc_status_type ppc64_elf_toc_ha_reloc |
59 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
60 | | static bfd_reloc_status_type ppc64_elf_toc64_reloc |
61 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
62 | | static bfd_reloc_status_type ppc64_elf_prefix_reloc |
63 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
64 | | static bfd_reloc_status_type ppc64_elf_unhandled_reloc |
65 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
66 | | static bfd_vma opd_entry_value |
67 | | (asection *, bfd_vma, asection **, bfd_vma *, bool); |
68 | | |
69 | | #define TARGET_LITTLE_SYM powerpc_elf64_le_vec |
70 | | #define TARGET_LITTLE_NAME "elf64-powerpcle" |
71 | | #define TARGET_BIG_SYM powerpc_elf64_vec |
72 | | #define TARGET_BIG_NAME "elf64-powerpc" |
73 | | #define ELF_ARCH bfd_arch_powerpc |
74 | | #define ELF_TARGET_ID PPC64_ELF_DATA |
75 | | #define ELF_MACHINE_CODE EM_PPC64 |
76 | | #define ELF_MAXPAGESIZE 0x10000 |
77 | | #define ELF_COMMONPAGESIZE 0x1000 |
78 | | #define elf_info_to_howto ppc64_elf_info_to_howto |
79 | | |
80 | | #define elf_backend_want_got_sym 0 |
81 | | #define elf_backend_want_plt_sym 0 |
82 | | #define elf_backend_plt_alignment 3 |
83 | | #define elf_backend_plt_not_loaded 1 |
84 | | #define elf_backend_got_header_size 8 |
85 | | #define elf_backend_want_dynrelro 1 |
86 | | #define elf_backend_can_gc_sections 1 |
87 | | #define elf_backend_can_refcount 1 |
88 | | #define elf_backend_rela_normal 1 |
89 | | #define elf_backend_dtrel_excludes_plt 1 |
90 | | #define elf_backend_default_execstack 0 |
91 | | |
92 | | #define bfd_elf64_mkobject ppc64_elf_mkobject |
93 | | #define bfd_elf64_bfd_free_cached_info ppc64_elf_free_cached_info |
94 | | #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
95 | | #define bfd_elf64_bfd_reloc_name_lookup ppc64_elf_reloc_name_lookup |
96 | | #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
97 | | #define bfd_elf64_bfd_print_private_bfd_data ppc64_elf_print_private_bfd_data |
98 | | #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook |
99 | | #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create |
100 | | #define bfd_elf64_get_synthetic_symtab ppc64_elf_get_synthetic_symtab |
101 | | #define bfd_elf64_bfd_link_just_syms ppc64_elf_link_just_syms |
102 | | #define bfd_elf64_bfd_gc_sections ppc64_elf_gc_sections |
103 | | |
104 | | #define elf_backend_object_p ppc64_elf_object_p |
105 | | #define elf_backend_grok_prstatus ppc64_elf_grok_prstatus |
106 | | #define elf_backend_grok_psinfo ppc64_elf_grok_psinfo |
107 | | #define elf_backend_write_core_note ppc64_elf_write_core_note |
108 | | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
109 | | #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol |
110 | | #define elf_backend_add_symbol_hook ppc64_elf_add_symbol_hook |
111 | | #define elf_backend_check_directives ppc64_elf_before_check_relocs |
112 | | #define elf_backend_notice_as_needed ppc64_elf_notice_as_needed |
113 | | #define elf_backend_archive_symbol_lookup ppc64_elf_archive_symbol_lookup |
114 | | #define elf_backend_check_relocs ppc64_elf_check_relocs |
115 | | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
116 | | #define elf_backend_gc_keep ppc64_elf_gc_keep |
117 | | #define elf_backend_gc_mark_dynamic_ref ppc64_elf_gc_mark_dynamic_ref |
118 | | #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook |
119 | | #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol |
120 | | #define elf_backend_hide_symbol ppc64_elf_hide_symbol |
121 | | #define elf_backend_maybe_function_sym ppc64_elf_maybe_function_sym |
122 | | #define elf_backend_early_size_sections ppc64_elf_edit |
123 | | #define elf_backend_late_size_sections ppc64_elf_late_size_sections |
124 | | #define elf_backend_hash_symbol ppc64_elf_hash_symbol |
125 | | #define elf_backend_init_index_section _bfd_elf_init_2_index_sections |
126 | | #define elf_backend_action_discarded ppc64_elf_action_discarded |
127 | | #define elf_backend_relocate_section ppc64_elf_relocate_section |
128 | | #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol |
129 | | #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class |
130 | | #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections |
131 | | #define elf_backend_link_output_symbol_hook ppc64_elf_output_symbol_hook |
132 | | #define elf_backend_special_sections ppc64_elf_special_sections |
133 | | #define elf_backend_section_flags ppc64_elf_section_flags |
134 | | #define elf_backend_merge_symbol_attribute ppc64_elf_merge_symbol_attribute |
135 | | #define elf_backend_merge_symbol ppc64_elf_merge_symbol |
136 | | #define elf_backend_get_reloc_section bfd_get_section_by_name |
137 | | |
138 | | /* The name of the dynamic interpreter. This is put in the .interp |
139 | | section. */ |
140 | 0 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
141 | | |
142 | | /* The size in bytes of an entry in the procedure linkage table. */ |
143 | 0 | #define PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 8) |
144 | 0 | #define LOCAL_PLT_ENTRY_SIZE(htab) (htab->opd_abi ? 16 : 8) |
145 | | |
146 | | /* The initial size of the plt reserved for the dynamic linker. */ |
147 | 0 | #define PLT_INITIAL_ENTRY_SIZE(htab) (htab->opd_abi ? 24 : 16) |
148 | | |
149 | | /* Offsets to some stack save slots. */ |
150 | | #define STK_LR 16 |
151 | 0 | #define STK_TOC(htab) (htab->opd_abi ? 40 : 24) |
152 | | /* This one is dodgy. ELFv2 does not have a linker word, so use the |
153 | | CR save slot. Used only by optimised __tls_get_addr call stub, |
154 | | relying on __tls_get_addr_opt not saving CR.. */ |
155 | 0 | #define STK_LINKER(htab) (htab->opd_abi ? 32 : 8) |
156 | | |
157 | | /* TOC base pointers offset from start of TOC. */ |
158 | 27 | #define TOC_BASE_OFF 0x8000 |
159 | | /* TOC base alignment. */ |
160 | 25 | #define TOC_BASE_ALIGN 256 |
161 | | |
162 | | /* Offset of tp and dtp pointers from start of TLS block. */ |
163 | 0 | #define TP_OFFSET 0x7000 |
164 | 0 | #define DTP_OFFSET 0x8000 |
165 | | |
166 | | /* .plt call stub instructions. The normal stub is like this, but |
167 | | sometimes the .plt entry crosses a 64k boundary and we need to |
168 | | insert an addi to adjust r11. */ |
169 | | #define STD_R2_0R1 0xf8410000 /* std %r2,0+40(%r1) */ |
170 | | #define ADDIS_R11_R2 0x3d620000 /* addis %r11,%r2,xxx@ha */ |
171 | | #define LD_R12_0R11 0xe98b0000 /* ld %r12,xxx+0@l(%r11) */ |
172 | | #define MTCTR_R12 0x7d8903a6 /* mtctr %r12 */ |
173 | | #define LD_R2_0R11 0xe84b0000 /* ld %r2,xxx+8@l(%r11) */ |
174 | | #define LD_R11_0R11 0xe96b0000 /* ld %r11,xxx+16@l(%r11) */ |
175 | | #define BCTR 0x4e800420 /* bctr */ |
176 | | |
177 | | #define ADDI_R11_R11 0x396b0000 /* addi %r11,%r11,off@l */ |
178 | | #define ADDI_R12_R11 0x398b0000 /* addi %r12,%r11,off@l */ |
179 | | #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,off@l */ |
180 | | #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ |
181 | 0 | #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ |
182 | | |
183 | | #define XOR_R2_R12_R12 0x7d826278 /* xor %r2,%r12,%r12 */ |
184 | | #define ADD_R11_R11_R2 0x7d6b1214 /* add %r11,%r11,%r2 */ |
185 | | #define XOR_R11_R12_R12 0x7d8b6278 /* xor %r11,%r12,%r12 */ |
186 | | #define ADD_R2_R2_R11 0x7c425a14 /* add %r2,%r2,%r11 */ |
187 | | #define CMPLDI_R2_0 0x28220000 /* cmpldi %r2,0 */ |
188 | | #define BNECTR 0x4ca20420 /* bnectr+ */ |
189 | | #define BNECTR_P4 0x4ce20420 /* bnectr+ */ |
190 | | |
191 | | #define LD_R12_0R2 0xe9820000 /* ld %r12,xxx+0(%r2) */ |
192 | | #define LD_R11_0R2 0xe9620000 /* ld %r11,xxx+0(%r2) */ |
193 | | #define LD_R2_0R2 0xe8420000 /* ld %r2,xxx+0(%r2) */ |
194 | | |
195 | 0 | #define LD_R2_0R1 0xe8410000 /* ld %r2,0(%r1) */ |
196 | 0 | #define LD_R2_0R12 0xe84c0000 /* ld %r2,0(%r12) */ |
197 | 0 | #define ADD_R2_R2_R12 0x7c426214 /* add %r2,%r2,%r12 */ |
198 | | |
199 | | #define LI_R11_0 0x39600000 /* li %r11,0 */ |
200 | | #define LIS_R2 0x3c400000 /* lis %r2,xxx@ha */ |
201 | | #define LIS_R11 0x3d600000 /* lis %r11,xxx@ha */ |
202 | | #define LIS_R12 0x3d800000 /* lis %r12,xxx@ha */ |
203 | 0 | #define ADDIS_R2_R12 0x3c4c0000 /* addis %r2,%r12,xxx@ha */ |
204 | | #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ |
205 | | #define ADDIS_R12_R11 0x3d8b0000 /* addis %r12,%r11,xxx@ha */ |
206 | | #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ |
207 | | #define ORIS_R12_R12_0 0x658c0000 /* oris %r12,%r12,xxx@hi */ |
208 | | #define ORI_R11_R11_0 0x616b0000 /* ori %r11,%r11,xxx@l */ |
209 | | #define ORI_R12_R12_0 0x618c0000 /* ori %r12,%r12,xxx@l */ |
210 | | #define LD_R12_0R12 0xe98c0000 /* ld %r12,xxx@l(%r12) */ |
211 | | #define SLDI_R11_R11_34 0x796b1746 /* sldi %r11,%r11,34 */ |
212 | | #define SLDI_R12_R12_32 0x799c07c6 /* sldi %r12,%r12,32 */ |
213 | | #define LDX_R12_R11_R12 0x7d8b602a /* ldx %r12,%r11,%r12 */ |
214 | | #define ADD_R12_R11_R12 0x7d8b6214 /* add %r12,%r11,%r12 */ |
215 | 0 | #define PADDI_R12_PC 0x0610000039800000ULL |
216 | 0 | #define PLD_R12_PC 0x04100000e5800000ULL |
217 | 0 | #define PNOP 0x0700000000000000ULL |
218 | | |
219 | | /* __glink_PLTresolve stub instructions. We enter with the index in |
220 | | R0 for ELFv1, and the address of a glink branch in R12 for ELFv2. */ |
221 | | #define GLINK_PLTRESOLVE_SIZE(htab) \ |
222 | 0 | (8u + (htab->opd_abi ? 11 * 4 : htab->has_plt_localentry0 ? 14 * 4 : 13 * 4)) |
223 | | /* 0: */ |
224 | | /* .quad plt0-1f */ |
225 | | /* __glink: */ |
226 | | #define MFLR_R12 0x7d8802a6 /* mflr %12 */ |
227 | | #define BCL_20_31 0x429f0005 /* bcl 20,31,1f */ |
228 | | /* 1: */ |
229 | | #define MFLR_R11 0x7d6802a6 /* mflr %11 */ |
230 | | /* ld %2,(0b-1b)(%11) */ |
231 | | #define MTLR_R12 0x7d8803a6 /* mtlr %12 */ |
232 | | #define ADD_R11_R2_R11 0x7d625a14 /* add %11,%2,%11 */ |
233 | | /* ld %12,0(%11) */ |
234 | | /* ld %2,8(%11) */ |
235 | | /* mtctr %12 */ |
236 | | /* ld %11,16(%11) */ |
237 | | /* bctr */ |
238 | | |
239 | | #define MFLR_R0 0x7c0802a6 /* mflr %r0 */ |
240 | | #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ |
241 | | #define SUB_R12_R12_R11 0x7d8b6050 /* subf %r12,%r11,%r12 */ |
242 | | #define ADDI_R0_R12 0x380c0000 /* addi %r0,%r12,0 */ |
243 | | #define SRDI_R0_R0_2 0x7800f082 /* rldicl %r0,%r0,62,2 */ |
244 | 0 | #define LD_R0_0R11 0xe80b0000 /* ld %r0,0(%r11) */ |
245 | | #define ADD_R11_R0_R11 0x7d605a14 /* add %r11,%r0,%r11 */ |
246 | | |
247 | | /* Pad with this. */ |
248 | 0 | #define NOP 0x60000000 |
249 | | |
250 | | /* Some other nops. */ |
251 | 0 | #define CROR_151515 0x4def7b82 |
252 | 0 | #define CROR_313131 0x4ffffb82 |
253 | | |
254 | | /* .glink entries for the first 32k functions are two instructions. */ |
255 | | #define LI_R0_0 0x38000000 /* li %r0,0 */ |
256 | 0 | #define B_DOT 0x48000000 /* b . */ |
257 | | |
258 | | /* After that, we need two instructions to load the index, followed by |
259 | | a branch. */ |
260 | | #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ |
261 | | #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ |
262 | | |
263 | | /* Instructions used by the save and restore reg functions. */ |
264 | | #define STD_R0_0R1 0xf8010000 /* std %r0,0(%r1) */ |
265 | | #define STD_R0_0R12 0xf80c0000 /* std %r0,0(%r12) */ |
266 | | #define LD_R0_0R1 0xe8010000 /* ld %r0,0(%r1) */ |
267 | | #define LD_R0_0R12 0xe80c0000 /* ld %r0,0(%r12) */ |
268 | | #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ |
269 | | #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ |
270 | | #define LI_R12_0 0x39800000 /* li %r12,0 */ |
271 | | #define STVX_VR0_R12_R0 0x7c0c01ce /* stvx %v0,%r12,%r0 */ |
272 | | #define LVX_VR0_R12_R0 0x7c0c00ce /* lvx %v0,%r12,%r0 */ |
273 | | #define MTLR_R0 0x7c0803a6 /* mtlr %r0 */ |
274 | | #define BLR 0x4e800020 /* blr */ |
275 | | |
276 | | /* Since .opd is an array of descriptors and each entry will end up |
277 | | with identical R_PPC64_RELATIVE relocs, there is really no need to |
278 | | propagate .opd relocs; The dynamic linker should be taught to |
279 | | relocate .opd without reloc entries. */ |
280 | | #ifndef NO_OPD_RELOCS |
281 | 0 | #define NO_OPD_RELOCS 0 |
282 | | #endif |
283 | | |
284 | | #ifndef ARRAY_SIZE |
285 | 1.63k | #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0])) |
286 | | #endif |
287 | | |
288 | | static inline int |
289 | | abiversion (bfd *abfd) |
290 | 12 | { |
291 | 12 | return elf_elfheader (abfd)->e_flags & EF_PPC64_ABI; |
292 | 12 | } |
293 | | |
294 | | static inline void |
295 | | set_abiversion (bfd *abfd, int ver) |
296 | 0 | { |
297 | 0 | elf_elfheader (abfd)->e_flags &= ~EF_PPC64_ABI; |
298 | 0 | elf_elfheader (abfd)->e_flags |= ver & EF_PPC64_ABI; |
299 | 0 | } |
300 | | |
301 | | #define is_ppc64_elf(bfd) \ |
302 | 77 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
303 | 77 | && elf_object_id (bfd) == PPC64_ELF_DATA) |
304 | | |
305 | | /* Relocation HOWTO's. */ |
306 | | /* Like other ELF RELA targets that don't apply multiple |
307 | | field-altering relocations to the same localation, src_mask is |
308 | | always zero and pcrel_offset is the same as pc_relative. |
309 | | PowerPC can always use a zero bitpos, even when the field is not at |
310 | | the LSB. For example, a REL24 could use rightshift=2, bisize=24 |
311 | | and bitpos=2 which matches the ABI description, or as we do here, |
312 | | rightshift=0, bitsize=26 and bitpos=0. */ |
313 | | #define HOW(type, size, bitsize, mask, rightshift, pc_relative, \ |
314 | | complain, special_func) \ |
315 | | HOWTO (type, rightshift, size, bitsize, pc_relative, 0, \ |
316 | | complain_overflow_ ## complain, special_func, \ |
317 | | #type, false, 0, mask, pc_relative) |
318 | | |
319 | | static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; |
320 | | |
321 | | static reloc_howto_type ppc64_elf_howto_raw[] = |
322 | | { |
323 | | /* This reloc does nothing. */ |
324 | | HOW (R_PPC64_NONE, 0, 0, 0, 0, false, dont, |
325 | | bfd_elf_generic_reloc), |
326 | | |
327 | | /* A standard 32 bit relocation. */ |
328 | | HOW (R_PPC64_ADDR32, 4, 32, 0xffffffff, 0, false, bitfield, |
329 | | bfd_elf_generic_reloc), |
330 | | |
331 | | /* An absolute 26 bit branch; the lower two bits must be zero. |
332 | | FIXME: we don't check that, we just clear them. */ |
333 | | HOW (R_PPC64_ADDR24, 4, 26, 0x03fffffc, 0, false, bitfield, |
334 | | bfd_elf_generic_reloc), |
335 | | |
336 | | /* A standard 16 bit relocation. */ |
337 | | HOW (R_PPC64_ADDR16, 2, 16, 0xffff, 0, false, bitfield, |
338 | | bfd_elf_generic_reloc), |
339 | | |
340 | | /* A 16 bit relocation without overflow. */ |
341 | | HOW (R_PPC64_ADDR16_LO, 2, 16, 0xffff, 0, false, dont, |
342 | | bfd_elf_generic_reloc), |
343 | | |
344 | | /* Bits 16-31 of an address. */ |
345 | | HOW (R_PPC64_ADDR16_HI, 2, 16, 0xffff, 16, false, signed, |
346 | | bfd_elf_generic_reloc), |
347 | | |
348 | | /* Bits 16-31 of an address, plus 1 if the contents of the low 16 |
349 | | bits, treated as a signed number, is negative. */ |
350 | | HOW (R_PPC64_ADDR16_HA, 2, 16, 0xffff, 16, false, signed, |
351 | | ppc64_elf_ha_reloc), |
352 | | |
353 | | /* An absolute 16 bit branch; the lower two bits must be zero. |
354 | | FIXME: we don't check that, we just clear them. */ |
355 | | HOW (R_PPC64_ADDR14, 4, 16, 0x0000fffc, 0, false, signed, |
356 | | ppc64_elf_branch_reloc), |
357 | | |
358 | | /* An absolute 16 bit branch, for which bit 10 should be set to |
359 | | indicate that the branch is expected to be taken. The lower two |
360 | | bits must be zero. */ |
361 | | HOW (R_PPC64_ADDR14_BRTAKEN, 4, 16, 0x0000fffc, 0, false, signed, |
362 | | ppc64_elf_brtaken_reloc), |
363 | | |
364 | | /* An absolute 16 bit branch, for which bit 10 should be set to |
365 | | indicate that the branch is not expected to be taken. The lower |
366 | | two bits must be zero. */ |
367 | | HOW (R_PPC64_ADDR14_BRNTAKEN, 4, 16, 0x0000fffc, 0, false, signed, |
368 | | ppc64_elf_brtaken_reloc), |
369 | | |
370 | | /* A relative 26 bit branch; the lower two bits must be zero. */ |
371 | | HOW (R_PPC64_REL24, 4, 26, 0x03fffffc, 0, true, signed, |
372 | | ppc64_elf_branch_reloc), |
373 | | |
374 | | /* A variant of R_PPC64_REL24, used when r2 is not the toc pointer. */ |
375 | | HOW (R_PPC64_REL24_NOTOC, 4, 26, 0x03fffffc, 0, true, signed, |
376 | | ppc64_elf_branch_reloc), |
377 | | |
378 | | /* Another variant, when p10 insns can't be used on stubs. */ |
379 | | HOW (R_PPC64_REL24_P9NOTOC, 4, 26, 0x03fffffc, 0, true, signed, |
380 | | ppc64_elf_branch_reloc), |
381 | | |
382 | | /* A relative 16 bit branch; the lower two bits must be zero. */ |
383 | | HOW (R_PPC64_REL14, 4, 16, 0x0000fffc, 0, true, signed, |
384 | | ppc64_elf_branch_reloc), |
385 | | |
386 | | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
387 | | the branch is expected to be taken. The lower two bits must be |
388 | | zero. */ |
389 | | HOW (R_PPC64_REL14_BRTAKEN, 4, 16, 0x0000fffc, 0, true, signed, |
390 | | ppc64_elf_brtaken_reloc), |
391 | | |
392 | | /* A relative 16 bit branch. Bit 10 should be set to indicate that |
393 | | the branch is not expected to be taken. The lower two bits must |
394 | | be zero. */ |
395 | | HOW (R_PPC64_REL14_BRNTAKEN, 4, 16, 0x0000fffc, 0, true, signed, |
396 | | ppc64_elf_brtaken_reloc), |
397 | | |
398 | | /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the |
399 | | symbol. */ |
400 | | HOW (R_PPC64_GOT16, 2, 16, 0xffff, 0, false, signed, |
401 | | ppc64_elf_unhandled_reloc), |
402 | | |
403 | | /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for |
404 | | the symbol. */ |
405 | | HOW (R_PPC64_GOT16_LO, 2, 16, 0xffff, 0, false, dont, |
406 | | ppc64_elf_unhandled_reloc), |
407 | | |
408 | | /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for |
409 | | the symbol. */ |
410 | | HOW (R_PPC64_GOT16_HI, 2, 16, 0xffff, 16, false, signed, |
411 | | ppc64_elf_unhandled_reloc), |
412 | | |
413 | | /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for |
414 | | the symbol. */ |
415 | | HOW (R_PPC64_GOT16_HA, 2, 16, 0xffff, 16, false, signed, |
416 | | ppc64_elf_unhandled_reloc), |
417 | | |
418 | | /* This is used only by the dynamic linker. The symbol should exist |
419 | | both in the object being run and in some shared library. The |
420 | | dynamic linker copies the data addressed by the symbol from the |
421 | | shared library into the object, because the object being |
422 | | run has to have the data at some particular address. */ |
423 | | HOW (R_PPC64_COPY, 0, 0, 0, 0, false, dont, |
424 | | ppc64_elf_unhandled_reloc), |
425 | | |
426 | | /* Like R_PPC64_ADDR64, but used when setting global offset table |
427 | | entries. */ |
428 | | HOW (R_PPC64_GLOB_DAT, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
429 | | ppc64_elf_unhandled_reloc), |
430 | | |
431 | | /* Created by the link editor. Marks a procedure linkage table |
432 | | entry for a symbol. */ |
433 | | HOW (R_PPC64_JMP_SLOT, 0, 0, 0, 0, false, dont, |
434 | | ppc64_elf_unhandled_reloc), |
435 | | |
436 | | /* Used only by the dynamic linker. When the object is run, this |
437 | | doubleword64 is set to the load address of the object, plus the |
438 | | addend. */ |
439 | | HOW (R_PPC64_RELATIVE, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
440 | | bfd_elf_generic_reloc), |
441 | | |
442 | | /* Like R_PPC64_ADDR32, but may be unaligned. */ |
443 | | HOW (R_PPC64_UADDR32, 4, 32, 0xffffffff, 0, false, bitfield, |
444 | | bfd_elf_generic_reloc), |
445 | | |
446 | | /* Like R_PPC64_ADDR16, but may be unaligned. */ |
447 | | HOW (R_PPC64_UADDR16, 2, 16, 0xffff, 0, false, bitfield, |
448 | | bfd_elf_generic_reloc), |
449 | | |
450 | | /* 32-bit PC relative. */ |
451 | | HOW (R_PPC64_REL32, 4, 32, 0xffffffff, 0, true, signed, |
452 | | bfd_elf_generic_reloc), |
453 | | |
454 | | /* 32-bit relocation to the symbol's procedure linkage table. */ |
455 | | HOW (R_PPC64_PLT32, 4, 32, 0xffffffff, 0, false, bitfield, |
456 | | ppc64_elf_unhandled_reloc), |
457 | | |
458 | | /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
459 | | FIXME: R_PPC64_PLTREL32 not supported. */ |
460 | | HOW (R_PPC64_PLTREL32, 4, 32, 0xffffffff, 0, true, signed, |
461 | | ppc64_elf_unhandled_reloc), |
462 | | |
463 | | /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for |
464 | | the symbol. */ |
465 | | HOW (R_PPC64_PLT16_LO, 2, 16, 0xffff, 0, false, dont, |
466 | | ppc64_elf_unhandled_reloc), |
467 | | |
468 | | /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for |
469 | | the symbol. */ |
470 | | HOW (R_PPC64_PLT16_HI, 2, 16, 0xffff, 16, false, signed, |
471 | | ppc64_elf_unhandled_reloc), |
472 | | |
473 | | /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for |
474 | | the symbol. */ |
475 | | HOW (R_PPC64_PLT16_HA, 2, 16, 0xffff, 16, false, signed, |
476 | | ppc64_elf_unhandled_reloc), |
477 | | |
478 | | /* 16-bit section relative relocation. */ |
479 | | HOW (R_PPC64_SECTOFF, 2, 16, 0xffff, 0, false, signed, |
480 | | ppc64_elf_sectoff_reloc), |
481 | | |
482 | | /* Like R_PPC64_SECTOFF, but no overflow warning. */ |
483 | | HOW (R_PPC64_SECTOFF_LO, 2, 16, 0xffff, 0, false, dont, |
484 | | ppc64_elf_sectoff_reloc), |
485 | | |
486 | | /* 16-bit upper half section relative relocation. */ |
487 | | HOW (R_PPC64_SECTOFF_HI, 2, 16, 0xffff, 16, false, signed, |
488 | | ppc64_elf_sectoff_reloc), |
489 | | |
490 | | /* 16-bit upper half adjusted section relative relocation. */ |
491 | | HOW (R_PPC64_SECTOFF_HA, 2, 16, 0xffff, 16, false, signed, |
492 | | ppc64_elf_sectoff_ha_reloc), |
493 | | |
494 | | /* Like R_PPC64_REL24 without touching the two least significant bits. */ |
495 | | HOW (R_PPC64_REL30, 4, 30, 0xfffffffc, 2, true, dont, |
496 | | bfd_elf_generic_reloc), |
497 | | |
498 | | /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ |
499 | | |
500 | | /* A standard 64-bit relocation. */ |
501 | | HOW (R_PPC64_ADDR64, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
502 | | bfd_elf_generic_reloc), |
503 | | |
504 | | /* The bits 32-47 of an address. */ |
505 | | HOW (R_PPC64_ADDR16_HIGHER, 2, 16, 0xffff, 32, false, dont, |
506 | | bfd_elf_generic_reloc), |
507 | | |
508 | | /* The bits 32-47 of an address, plus 1 if the contents of the low |
509 | | 16 bits, treated as a signed number, is negative. */ |
510 | | HOW (R_PPC64_ADDR16_HIGHERA, 2, 16, 0xffff, 32, false, dont, |
511 | | ppc64_elf_ha_reloc), |
512 | | |
513 | | /* The bits 48-63 of an address. */ |
514 | | HOW (R_PPC64_ADDR16_HIGHEST, 2, 16, 0xffff, 48, false, dont, |
515 | | bfd_elf_generic_reloc), |
516 | | |
517 | | /* The bits 48-63 of an address, plus 1 if the contents of the low |
518 | | 16 bits, treated as a signed number, is negative. */ |
519 | | HOW (R_PPC64_ADDR16_HIGHESTA, 2, 16, 0xffff, 48, false, dont, |
520 | | ppc64_elf_ha_reloc), |
521 | | |
522 | | /* Like ADDR64, but may be unaligned. */ |
523 | | HOW (R_PPC64_UADDR64, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
524 | | bfd_elf_generic_reloc), |
525 | | |
526 | | /* 64-bit relative relocation. */ |
527 | | HOW (R_PPC64_REL64, 8, 64, 0xffffffffffffffffULL, 0, true, dont, |
528 | | bfd_elf_generic_reloc), |
529 | | |
530 | | /* 64-bit relocation to the symbol's procedure linkage table. */ |
531 | | HOW (R_PPC64_PLT64, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
532 | | ppc64_elf_unhandled_reloc), |
533 | | |
534 | | /* 64-bit PC relative relocation to the symbol's procedure linkage |
535 | | table. */ |
536 | | /* FIXME: R_PPC64_PLTREL64 not supported. */ |
537 | | HOW (R_PPC64_PLTREL64, 8, 64, 0xffffffffffffffffULL, 0, true, dont, |
538 | | ppc64_elf_unhandled_reloc), |
539 | | |
540 | | /* 16 bit TOC-relative relocation. */ |
541 | | /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ |
542 | | HOW (R_PPC64_TOC16, 2, 16, 0xffff, 0, false, signed, |
543 | | ppc64_elf_toc_reloc), |
544 | | |
545 | | /* 16 bit TOC-relative relocation without overflow. */ |
546 | | /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ |
547 | | HOW (R_PPC64_TOC16_LO, 2, 16, 0xffff, 0, false, dont, |
548 | | ppc64_elf_toc_reloc), |
549 | | |
550 | | /* 16 bit TOC-relative relocation, high 16 bits. */ |
551 | | /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ |
552 | | HOW (R_PPC64_TOC16_HI, 2, 16, 0xffff, 16, false, signed, |
553 | | ppc64_elf_toc_reloc), |
554 | | |
555 | | /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the |
556 | | contents of the low 16 bits, treated as a signed number, is |
557 | | negative. */ |
558 | | /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ |
559 | | HOW (R_PPC64_TOC16_HA, 2, 16, 0xffff, 16, false, signed, |
560 | | ppc64_elf_toc_ha_reloc), |
561 | | |
562 | | /* 64-bit relocation; insert value of TOC base (.TOC.). */ |
563 | | /* R_PPC64_TOC 51 doubleword64 .TOC. */ |
564 | | HOW (R_PPC64_TOC, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
565 | | ppc64_elf_toc64_reloc), |
566 | | |
567 | | /* Like R_PPC64_GOT16, but also informs the link editor that the |
568 | | value to relocate may (!) refer to a PLT entry which the link |
569 | | editor (a) may replace with the symbol value. If the link editor |
570 | | is unable to fully resolve the symbol, it may (b) create a PLT |
571 | | entry and store the address to the new PLT entry in the GOT. |
572 | | This permits lazy resolution of function symbols at run time. |
573 | | The link editor may also skip all of this and just (c) emit a |
574 | | R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ |
575 | | /* FIXME: R_PPC64_PLTGOT16 not implemented. */ |
576 | | HOW (R_PPC64_PLTGOT16, 2, 16, 0xffff, 0, false,signed, |
577 | | ppc64_elf_unhandled_reloc), |
578 | | |
579 | | /* Like R_PPC64_PLTGOT16, but without overflow. */ |
580 | | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
581 | | HOW (R_PPC64_PLTGOT16_LO, 2, 16, 0xffff, 0, false, dont, |
582 | | ppc64_elf_unhandled_reloc), |
583 | | |
584 | | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ |
585 | | /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ |
586 | | HOW (R_PPC64_PLTGOT16_HI, 2, 16, 0xffff, 16, false, signed, |
587 | | ppc64_elf_unhandled_reloc), |
588 | | |
589 | | /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus |
590 | | 1 if the contents of the low 16 bits, treated as a signed number, |
591 | | is negative. */ |
592 | | /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ |
593 | | HOW (R_PPC64_PLTGOT16_HA, 2, 16, 0xffff, 16, false, signed, |
594 | | ppc64_elf_unhandled_reloc), |
595 | | |
596 | | /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ |
597 | | HOW (R_PPC64_ADDR16_DS, 2, 16, 0xfffc, 0, false, signed, |
598 | | bfd_elf_generic_reloc), |
599 | | |
600 | | /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ |
601 | | HOW (R_PPC64_ADDR16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
602 | | bfd_elf_generic_reloc), |
603 | | |
604 | | /* Like R_PPC64_GOT16, but for instructions with a DS field. */ |
605 | | HOW (R_PPC64_GOT16_DS, 2, 16, 0xfffc, 0, false, signed, |
606 | | ppc64_elf_unhandled_reloc), |
607 | | |
608 | | /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ |
609 | | HOW (R_PPC64_GOT16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
610 | | ppc64_elf_unhandled_reloc), |
611 | | |
612 | | /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ |
613 | | HOW (R_PPC64_PLT16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
614 | | ppc64_elf_unhandled_reloc), |
615 | | |
616 | | /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ |
617 | | HOW (R_PPC64_SECTOFF_DS, 2, 16, 0xfffc, 0, false, signed, |
618 | | ppc64_elf_sectoff_reloc), |
619 | | |
620 | | /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ |
621 | | HOW (R_PPC64_SECTOFF_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
622 | | ppc64_elf_sectoff_reloc), |
623 | | |
624 | | /* Like R_PPC64_TOC16, but for instructions with a DS field. */ |
625 | | HOW (R_PPC64_TOC16_DS, 2, 16, 0xfffc, 0, false, signed, |
626 | | ppc64_elf_toc_reloc), |
627 | | |
628 | | /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ |
629 | | HOW (R_PPC64_TOC16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
630 | | ppc64_elf_toc_reloc), |
631 | | |
632 | | /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ |
633 | | /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ |
634 | | HOW (R_PPC64_PLTGOT16_DS, 2, 16, 0xfffc, 0, false, signed, |
635 | | ppc64_elf_unhandled_reloc), |
636 | | |
637 | | /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ |
638 | | /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
639 | | HOW (R_PPC64_PLTGOT16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
640 | | ppc64_elf_unhandled_reloc), |
641 | | |
642 | | /* Marker relocs for TLS. */ |
643 | | HOW (R_PPC64_TLS, 4, 32, 0, 0, false, dont, |
644 | | bfd_elf_generic_reloc), |
645 | | |
646 | | HOW (R_PPC64_TLSGD, 4, 32, 0, 0, false, dont, |
647 | | bfd_elf_generic_reloc), |
648 | | |
649 | | HOW (R_PPC64_TLSLD, 4, 32, 0, 0, false, dont, |
650 | | bfd_elf_generic_reloc), |
651 | | |
652 | | /* Marker reloc for optimizing r2 save in prologue rather than on |
653 | | each plt call stub. */ |
654 | | HOW (R_PPC64_TOCSAVE, 4, 32, 0, 0, false, dont, |
655 | | bfd_elf_generic_reloc), |
656 | | |
657 | | /* Marker relocs on inline plt call instructions. */ |
658 | | HOW (R_PPC64_PLTSEQ, 4, 32, 0, 0, false, dont, |
659 | | bfd_elf_generic_reloc), |
660 | | |
661 | | HOW (R_PPC64_PLTCALL, 4, 32, 0, 0, false, dont, |
662 | | bfd_elf_generic_reloc), |
663 | | |
664 | | /* Computes the load module index of the load module that contains the |
665 | | definition of its TLS sym. */ |
666 | | HOW (R_PPC64_DTPMOD64, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
667 | | ppc64_elf_unhandled_reloc), |
668 | | |
669 | | /* Computes a dtv-relative displacement, the difference between the value |
670 | | of sym+add and the base address of the thread-local storage block that |
671 | | contains the definition of sym, minus 0x8000. */ |
672 | | HOW (R_PPC64_DTPREL64, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
673 | | ppc64_elf_unhandled_reloc), |
674 | | |
675 | | /* A 16 bit dtprel reloc. */ |
676 | | HOW (R_PPC64_DTPREL16, 2, 16, 0xffff, 0, false, signed, |
677 | | ppc64_elf_unhandled_reloc), |
678 | | |
679 | | /* Like DTPREL16, but no overflow. */ |
680 | | HOW (R_PPC64_DTPREL16_LO, 2, 16, 0xffff, 0, false, dont, |
681 | | ppc64_elf_unhandled_reloc), |
682 | | |
683 | | /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
684 | | HOW (R_PPC64_DTPREL16_HI, 2, 16, 0xffff, 16, false, signed, |
685 | | ppc64_elf_unhandled_reloc), |
686 | | |
687 | | /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
688 | | HOW (R_PPC64_DTPREL16_HA, 2, 16, 0xffff, 16, false, signed, |
689 | | ppc64_elf_unhandled_reloc), |
690 | | |
691 | | /* Like DTPREL16_HI, but next higher group of 16 bits. */ |
692 | | HOW (R_PPC64_DTPREL16_HIGHER, 2, 16, 0xffff, 32, false, dont, |
693 | | ppc64_elf_unhandled_reloc), |
694 | | |
695 | | /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ |
696 | | HOW (R_PPC64_DTPREL16_HIGHERA, 2, 16, 0xffff, 32, false, dont, |
697 | | ppc64_elf_unhandled_reloc), |
698 | | |
699 | | /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ |
700 | | HOW (R_PPC64_DTPREL16_HIGHEST, 2, 16, 0xffff, 48, false, dont, |
701 | | ppc64_elf_unhandled_reloc), |
702 | | |
703 | | /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ |
704 | | HOW (R_PPC64_DTPREL16_HIGHESTA, 2, 16, 0xffff, 48, false, dont, |
705 | | ppc64_elf_unhandled_reloc), |
706 | | |
707 | | /* Like DTPREL16, but for insns with a DS field. */ |
708 | | HOW (R_PPC64_DTPREL16_DS, 2, 16, 0xfffc, 0, false, signed, |
709 | | ppc64_elf_unhandled_reloc), |
710 | | |
711 | | /* Like DTPREL16_DS, but no overflow. */ |
712 | | HOW (R_PPC64_DTPREL16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
713 | | ppc64_elf_unhandled_reloc), |
714 | | |
715 | | /* Computes a tp-relative displacement, the difference between the value of |
716 | | sym+add and the value of the thread pointer (r13). */ |
717 | | HOW (R_PPC64_TPREL64, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
718 | | ppc64_elf_unhandled_reloc), |
719 | | |
720 | | /* A 16 bit tprel reloc. */ |
721 | | HOW (R_PPC64_TPREL16, 2, 16, 0xffff, 0, false, signed, |
722 | | ppc64_elf_unhandled_reloc), |
723 | | |
724 | | /* Like TPREL16, but no overflow. */ |
725 | | HOW (R_PPC64_TPREL16_LO, 2, 16, 0xffff, 0, false, dont, |
726 | | ppc64_elf_unhandled_reloc), |
727 | | |
728 | | /* Like TPREL16_LO, but next higher group of 16 bits. */ |
729 | | HOW (R_PPC64_TPREL16_HI, 2, 16, 0xffff, 16, false, signed, |
730 | | ppc64_elf_unhandled_reloc), |
731 | | |
732 | | /* Like TPREL16_HI, but adjust for low 16 bits. */ |
733 | | HOW (R_PPC64_TPREL16_HA, 2, 16, 0xffff, 16, false, signed, |
734 | | ppc64_elf_unhandled_reloc), |
735 | | |
736 | | /* Like TPREL16_HI, but next higher group of 16 bits. */ |
737 | | HOW (R_PPC64_TPREL16_HIGHER, 2, 16, 0xffff, 32, false, dont, |
738 | | ppc64_elf_unhandled_reloc), |
739 | | |
740 | | /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ |
741 | | HOW (R_PPC64_TPREL16_HIGHERA, 2, 16, 0xffff, 32, false, dont, |
742 | | ppc64_elf_unhandled_reloc), |
743 | | |
744 | | /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ |
745 | | HOW (R_PPC64_TPREL16_HIGHEST, 2, 16, 0xffff, 48, false, dont, |
746 | | ppc64_elf_unhandled_reloc), |
747 | | |
748 | | /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ |
749 | | HOW (R_PPC64_TPREL16_HIGHESTA, 2, 16, 0xffff, 48, false, dont, |
750 | | ppc64_elf_unhandled_reloc), |
751 | | |
752 | | /* Like TPREL16, but for insns with a DS field. */ |
753 | | HOW (R_PPC64_TPREL16_DS, 2, 16, 0xfffc, 0, false, signed, |
754 | | ppc64_elf_unhandled_reloc), |
755 | | |
756 | | /* Like TPREL16_DS, but no overflow. */ |
757 | | HOW (R_PPC64_TPREL16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
758 | | ppc64_elf_unhandled_reloc), |
759 | | |
760 | | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
761 | | with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
762 | | to the first entry relative to the TOC base (r2). */ |
763 | | HOW (R_PPC64_GOT_TLSGD16, 2, 16, 0xffff, 0, false, signed, |
764 | | ppc64_elf_unhandled_reloc), |
765 | | |
766 | | /* Like GOT_TLSGD16, but no overflow. */ |
767 | | HOW (R_PPC64_GOT_TLSGD16_LO, 2, 16, 0xffff, 0, false, dont, |
768 | | ppc64_elf_unhandled_reloc), |
769 | | |
770 | | /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
771 | | HOW (R_PPC64_GOT_TLSGD16_HI, 2, 16, 0xffff, 16, false, signed, |
772 | | ppc64_elf_unhandled_reloc), |
773 | | |
774 | | /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
775 | | HOW (R_PPC64_GOT_TLSGD16_HA, 2, 16, 0xffff, 16, false, signed, |
776 | | ppc64_elf_unhandled_reloc), |
777 | | |
778 | | /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
779 | | with values (sym+add)@dtpmod and zero, and computes the offset to the |
780 | | first entry relative to the TOC base (r2). */ |
781 | | HOW (R_PPC64_GOT_TLSLD16, 2, 16, 0xffff, 0, false, signed, |
782 | | ppc64_elf_unhandled_reloc), |
783 | | |
784 | | /* Like GOT_TLSLD16, but no overflow. */ |
785 | | HOW (R_PPC64_GOT_TLSLD16_LO, 2, 16, 0xffff, 0, false, dont, |
786 | | ppc64_elf_unhandled_reloc), |
787 | | |
788 | | /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
789 | | HOW (R_PPC64_GOT_TLSLD16_HI, 2, 16, 0xffff, 16, false, signed, |
790 | | ppc64_elf_unhandled_reloc), |
791 | | |
792 | | /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
793 | | HOW (R_PPC64_GOT_TLSLD16_HA, 2, 16, 0xffff, 16, false, signed, |
794 | | ppc64_elf_unhandled_reloc), |
795 | | |
796 | | /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
797 | | the offset to the entry relative to the TOC base (r2). */ |
798 | | HOW (R_PPC64_GOT_DTPREL16_DS, 2, 16, 0xfffc, 0, false, signed, |
799 | | ppc64_elf_unhandled_reloc), |
800 | | |
801 | | /* Like GOT_DTPREL16_DS, but no overflow. */ |
802 | | HOW (R_PPC64_GOT_DTPREL16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
803 | | ppc64_elf_unhandled_reloc), |
804 | | |
805 | | /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ |
806 | | HOW (R_PPC64_GOT_DTPREL16_HI, 2, 16, 0xffff, 16, false, signed, |
807 | | ppc64_elf_unhandled_reloc), |
808 | | |
809 | | /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
810 | | HOW (R_PPC64_GOT_DTPREL16_HA, 2, 16, 0xffff, 16, false, signed, |
811 | | ppc64_elf_unhandled_reloc), |
812 | | |
813 | | /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
814 | | offset to the entry relative to the TOC base (r2). */ |
815 | | HOW (R_PPC64_GOT_TPREL16_DS, 2, 16, 0xfffc, 0, false, signed, |
816 | | ppc64_elf_unhandled_reloc), |
817 | | |
818 | | /* Like GOT_TPREL16_DS, but no overflow. */ |
819 | | HOW (R_PPC64_GOT_TPREL16_LO_DS, 2, 16, 0xfffc, 0, false, dont, |
820 | | ppc64_elf_unhandled_reloc), |
821 | | |
822 | | /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ |
823 | | HOW (R_PPC64_GOT_TPREL16_HI, 2, 16, 0xffff, 16, false, signed, |
824 | | ppc64_elf_unhandled_reloc), |
825 | | |
826 | | /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
827 | | HOW (R_PPC64_GOT_TPREL16_HA, 2, 16, 0xffff, 16, false, signed, |
828 | | ppc64_elf_unhandled_reloc), |
829 | | |
830 | | HOW (R_PPC64_JMP_IREL, 0, 0, 0, 0, false, dont, |
831 | | ppc64_elf_unhandled_reloc), |
832 | | |
833 | | HOW (R_PPC64_IRELATIVE, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
834 | | bfd_elf_generic_reloc), |
835 | | |
836 | | /* A 16 bit relative relocation. */ |
837 | | HOW (R_PPC64_REL16, 2, 16, 0xffff, 0, true, signed, |
838 | | bfd_elf_generic_reloc), |
839 | | |
840 | | /* A 16 bit relative relocation without overflow. */ |
841 | | HOW (R_PPC64_REL16_LO, 2, 16, 0xffff, 0, true, dont, |
842 | | bfd_elf_generic_reloc), |
843 | | |
844 | | /* The high order 16 bits of a relative address. */ |
845 | | HOW (R_PPC64_REL16_HI, 2, 16, 0xffff, 16, true, signed, |
846 | | bfd_elf_generic_reloc), |
847 | | |
848 | | /* The high order 16 bits of a relative address, plus 1 if the contents of |
849 | | the low 16 bits, treated as a signed number, is negative. */ |
850 | | HOW (R_PPC64_REL16_HA, 2, 16, 0xffff, 16, true, signed, |
851 | | ppc64_elf_ha_reloc), |
852 | | |
853 | | HOW (R_PPC64_REL16_HIGH, 2, 16, 0xffff, 16, true, dont, |
854 | | bfd_elf_generic_reloc), |
855 | | |
856 | | HOW (R_PPC64_REL16_HIGHA, 2, 16, 0xffff, 16, true, dont, |
857 | | ppc64_elf_ha_reloc), |
858 | | |
859 | | HOW (R_PPC64_REL16_HIGHER, 2, 16, 0xffff, 32, true, dont, |
860 | | bfd_elf_generic_reloc), |
861 | | |
862 | | HOW (R_PPC64_REL16_HIGHERA, 2, 16, 0xffff, 32, true, dont, |
863 | | ppc64_elf_ha_reloc), |
864 | | |
865 | | HOW (R_PPC64_REL16_HIGHEST, 2, 16, 0xffff, 48, true, dont, |
866 | | bfd_elf_generic_reloc), |
867 | | |
868 | | HOW (R_PPC64_REL16_HIGHESTA, 2, 16, 0xffff, 48, true, dont, |
869 | | ppc64_elf_ha_reloc), |
870 | | |
871 | | /* Like R_PPC64_REL16_HA but for split field in addpcis. */ |
872 | | HOW (R_PPC64_REL16DX_HA, 4, 16, 0x1fffc1, 16, true, signed, |
873 | | ppc64_elf_ha_reloc), |
874 | | |
875 | | /* A split-field reloc for addpcis, non-relative (gas internal use only). */ |
876 | | HOW (R_PPC64_16DX_HA, 4, 16, 0x1fffc1, 16, false, signed, |
877 | | ppc64_elf_ha_reloc), |
878 | | |
879 | | /* Like R_PPC64_ADDR16_HI, but no overflow. */ |
880 | | HOW (R_PPC64_ADDR16_HIGH, 2, 16, 0xffff, 16, false, dont, |
881 | | bfd_elf_generic_reloc), |
882 | | |
883 | | /* Like R_PPC64_ADDR16_HA, but no overflow. */ |
884 | | HOW (R_PPC64_ADDR16_HIGHA, 2, 16, 0xffff, 16, false, dont, |
885 | | ppc64_elf_ha_reloc), |
886 | | |
887 | | /* Like R_PPC64_DTPREL16_HI, but no overflow. */ |
888 | | HOW (R_PPC64_DTPREL16_HIGH, 2, 16, 0xffff, 16, false, dont, |
889 | | ppc64_elf_unhandled_reloc), |
890 | | |
891 | | /* Like R_PPC64_DTPREL16_HA, but no overflow. */ |
892 | | HOW (R_PPC64_DTPREL16_HIGHA, 2, 16, 0xffff, 16, false, dont, |
893 | | ppc64_elf_unhandled_reloc), |
894 | | |
895 | | /* Like R_PPC64_TPREL16_HI, but no overflow. */ |
896 | | HOW (R_PPC64_TPREL16_HIGH, 2, 16, 0xffff, 16, false, dont, |
897 | | ppc64_elf_unhandled_reloc), |
898 | | |
899 | | /* Like R_PPC64_TPREL16_HA, but no overflow. */ |
900 | | HOW (R_PPC64_TPREL16_HIGHA, 2, 16, 0xffff, 16, false, dont, |
901 | | ppc64_elf_unhandled_reloc), |
902 | | |
903 | | /* Marker reloc on ELFv2 large-model function entry. */ |
904 | | HOW (R_PPC64_ENTRY, 4, 32, 0, 0, false, dont, |
905 | | bfd_elf_generic_reloc), |
906 | | |
907 | | /* Like ADDR64, but use local entry point of function. */ |
908 | | HOW (R_PPC64_ADDR64_LOCAL, 8, 64, 0xffffffffffffffffULL, 0, false, dont, |
909 | | bfd_elf_generic_reloc), |
910 | | |
911 | | HOW (R_PPC64_PLTSEQ_NOTOC, 4, 32, 0, 0, false, dont, |
912 | | bfd_elf_generic_reloc), |
913 | | |
914 | | HOW (R_PPC64_PLTCALL_NOTOC, 4, 32, 0, 0, false, dont, |
915 | | bfd_elf_generic_reloc), |
916 | | |
917 | | HOW (R_PPC64_PCREL_OPT, 4, 32, 0, 0, false, dont, |
918 | | bfd_elf_generic_reloc), |
919 | | |
920 | | HOW (R_PPC64_D34, 8, 34, 0x3ffff0000ffffULL, 0, false, signed, |
921 | | ppc64_elf_prefix_reloc), |
922 | | |
923 | | HOW (R_PPC64_D34_LO, 8, 34, 0x3ffff0000ffffULL, 0, false, dont, |
924 | | ppc64_elf_prefix_reloc), |
925 | | |
926 | | HOW (R_PPC64_D34_HI30, 8, 34, 0x3ffff0000ffffULL, 34, false, dont, |
927 | | ppc64_elf_prefix_reloc), |
928 | | |
929 | | HOW (R_PPC64_D34_HA30, 8, 34, 0x3ffff0000ffffULL, 34, false, dont, |
930 | | ppc64_elf_prefix_reloc), |
931 | | |
932 | | HOW (R_PPC64_PCREL34, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
933 | | ppc64_elf_prefix_reloc), |
934 | | |
935 | | HOW (R_PPC64_GOT_PCREL34, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
936 | | ppc64_elf_unhandled_reloc), |
937 | | |
938 | | HOW (R_PPC64_PLT_PCREL34, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
939 | | ppc64_elf_unhandled_reloc), |
940 | | |
941 | | HOW (R_PPC64_PLT_PCREL34_NOTOC, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
942 | | ppc64_elf_unhandled_reloc), |
943 | | |
944 | | HOW (R_PPC64_TPREL34, 8, 34, 0x3ffff0000ffffULL, 0, false, signed, |
945 | | ppc64_elf_unhandled_reloc), |
946 | | |
947 | | HOW (R_PPC64_DTPREL34, 8, 34, 0x3ffff0000ffffULL, 0, false, signed, |
948 | | ppc64_elf_unhandled_reloc), |
949 | | |
950 | | HOW (R_PPC64_GOT_TLSGD_PCREL34, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
951 | | ppc64_elf_unhandled_reloc), |
952 | | |
953 | | HOW (R_PPC64_GOT_TLSLD_PCREL34, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
954 | | ppc64_elf_unhandled_reloc), |
955 | | |
956 | | HOW (R_PPC64_GOT_TPREL_PCREL34, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
957 | | ppc64_elf_unhandled_reloc), |
958 | | |
959 | | HOW (R_PPC64_GOT_DTPREL_PCREL34, 8, 34, 0x3ffff0000ffffULL, 0, true, signed, |
960 | | ppc64_elf_unhandled_reloc), |
961 | | |
962 | | HOW (R_PPC64_ADDR16_HIGHER34, 2, 16, 0xffff, 34, false, dont, |
963 | | bfd_elf_generic_reloc), |
964 | | |
965 | | HOW (R_PPC64_ADDR16_HIGHERA34, 2, 16, 0xffff, 34, false, dont, |
966 | | ppc64_elf_ha_reloc), |
967 | | |
968 | | HOW (R_PPC64_ADDR16_HIGHEST34, 2, 16, 0xffff, 50, false, dont, |
969 | | bfd_elf_generic_reloc), |
970 | | |
971 | | HOW (R_PPC64_ADDR16_HIGHESTA34, 2, 16, 0xffff, 50, false, dont, |
972 | | ppc64_elf_ha_reloc), |
973 | | |
974 | | HOW (R_PPC64_REL16_HIGHER34, 2, 16, 0xffff, 34, true, dont, |
975 | | bfd_elf_generic_reloc), |
976 | | |
977 | | HOW (R_PPC64_REL16_HIGHERA34, 2, 16, 0xffff, 34, true, dont, |
978 | | ppc64_elf_ha_reloc), |
979 | | |
980 | | HOW (R_PPC64_REL16_HIGHEST34, 2, 16, 0xffff, 50, true, dont, |
981 | | bfd_elf_generic_reloc), |
982 | | |
983 | | HOW (R_PPC64_REL16_HIGHESTA34, 2, 16, 0xffff, 50, true, dont, |
984 | | ppc64_elf_ha_reloc), |
985 | | |
986 | | HOW (R_PPC64_D28, 8, 28, 0xfff0000ffffULL, 0, false, signed, |
987 | | ppc64_elf_prefix_reloc), |
988 | | |
989 | | HOW (R_PPC64_PCREL28, 8, 28, 0xfff0000ffffULL, 0, true, signed, |
990 | | ppc64_elf_prefix_reloc), |
991 | | |
992 | | /* GNU extension to record C++ vtable hierarchy. */ |
993 | | HOW (R_PPC64_GNU_VTINHERIT, 0, 0, 0, 0, false, dont, |
994 | | NULL), |
995 | | |
996 | | /* GNU extension to record C++ vtable member usage. */ |
997 | | HOW (R_PPC64_GNU_VTENTRY, 0, 0, 0, 0, false, dont, |
998 | | NULL), |
999 | | }; |
1000 | | |
1001 | | |
1002 | | /* Initialize the ppc64_elf_howto_table, so that linear accesses can |
1003 | | be done. */ |
1004 | | |
1005 | | static void |
1006 | | ppc_howto_init (void) |
1007 | 4 | { |
1008 | 4 | unsigned int i, type; |
1009 | | |
1010 | 652 | for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) |
1011 | 648 | { |
1012 | 648 | type = ppc64_elf_howto_raw[i].type; |
1013 | 648 | BFD_ASSERT (type < ARRAY_SIZE (ppc64_elf_howto_table)); |
1014 | 648 | ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; |
1015 | 648 | } |
1016 | 4 | } |
1017 | | |
1018 | | static reloc_howto_type * |
1019 | | ppc64_elf_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code) |
1020 | 0 | { |
1021 | 0 | enum elf_ppc64_reloc_type r = R_PPC64_NONE; |
1022 | |
|
1023 | 0 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
1024 | | /* Initialize howto table if needed. */ |
1025 | 0 | ppc_howto_init (); |
1026 | |
|
1027 | 0 | switch (code) |
1028 | 0 | { |
1029 | 0 | default: |
1030 | | /* xgettext:c-format */ |
1031 | 0 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, |
1032 | 0 | (int) code); |
1033 | 0 | bfd_set_error (bfd_error_bad_value); |
1034 | 0 | return NULL; |
1035 | | |
1036 | 0 | case BFD_RELOC_NONE: r = R_PPC64_NONE; |
1037 | 0 | break; |
1038 | 0 | case BFD_RELOC_32: r = R_PPC64_ADDR32; |
1039 | 0 | break; |
1040 | 0 | case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; |
1041 | 0 | break; |
1042 | 0 | case BFD_RELOC_16: r = R_PPC64_ADDR16; |
1043 | 0 | break; |
1044 | 0 | case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; |
1045 | 0 | break; |
1046 | 0 | case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; |
1047 | 0 | break; |
1048 | 0 | case BFD_RELOC_PPC64_ADDR16_HIGH: r = R_PPC64_ADDR16_HIGH; |
1049 | 0 | break; |
1050 | 0 | case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; |
1051 | 0 | break; |
1052 | 0 | case BFD_RELOC_PPC64_ADDR16_HIGHA: r = R_PPC64_ADDR16_HIGHA; |
1053 | 0 | break; |
1054 | 0 | case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; |
1055 | 0 | break; |
1056 | 0 | case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; |
1057 | 0 | break; |
1058 | 0 | case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; |
1059 | 0 | break; |
1060 | 0 | case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; |
1061 | 0 | break; |
1062 | 0 | case BFD_RELOC_PPC64_REL24_NOTOC: r = R_PPC64_REL24_NOTOC; |
1063 | 0 | break; |
1064 | 0 | case BFD_RELOC_PPC64_REL24_P9NOTOC: r = R_PPC64_REL24_P9NOTOC; |
1065 | 0 | break; |
1066 | 0 | case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; |
1067 | 0 | break; |
1068 | 0 | case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; |
1069 | 0 | break; |
1070 | 0 | case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; |
1071 | 0 | break; |
1072 | 0 | case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; |
1073 | 0 | break; |
1074 | 0 | case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; |
1075 | 0 | break; |
1076 | 0 | case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; |
1077 | 0 | break; |
1078 | 0 | case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; |
1079 | 0 | break; |
1080 | 0 | case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; |
1081 | 0 | break; |
1082 | 0 | case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; |
1083 | 0 | break; |
1084 | 0 | case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; |
1085 | 0 | break; |
1086 | 0 | case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; |
1087 | 0 | break; |
1088 | 0 | case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; |
1089 | 0 | break; |
1090 | 0 | case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; |
1091 | 0 | break; |
1092 | 0 | case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; |
1093 | 0 | break; |
1094 | 0 | case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; |
1095 | 0 | break; |
1096 | 0 | case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; |
1097 | 0 | break; |
1098 | 0 | case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; |
1099 | 0 | break; |
1100 | 0 | case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; |
1101 | 0 | break; |
1102 | 0 | case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; |
1103 | 0 | break; |
1104 | 0 | case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; |
1105 | 0 | break; |
1106 | 0 | case BFD_RELOC_64: r = R_PPC64_ADDR64; |
1107 | 0 | break; |
1108 | 0 | case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; |
1109 | 0 | break; |
1110 | 0 | case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; |
1111 | 0 | break; |
1112 | 0 | case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; |
1113 | 0 | break; |
1114 | 0 | case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; |
1115 | 0 | break; |
1116 | 0 | case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; |
1117 | 0 | break; |
1118 | 0 | case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; |
1119 | 0 | break; |
1120 | 0 | case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; |
1121 | 0 | break; |
1122 | 0 | case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; |
1123 | 0 | break; |
1124 | 0 | case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; |
1125 | 0 | break; |
1126 | 0 | case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; |
1127 | 0 | break; |
1128 | 0 | case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; |
1129 | 0 | break; |
1130 | 0 | case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; |
1131 | 0 | break; |
1132 | 0 | case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; |
1133 | 0 | break; |
1134 | 0 | case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; |
1135 | 0 | break; |
1136 | 0 | case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; |
1137 | 0 | break; |
1138 | 0 | case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; |
1139 | 0 | break; |
1140 | 0 | case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; |
1141 | 0 | break; |
1142 | 0 | case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; |
1143 | 0 | break; |
1144 | 0 | case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; |
1145 | 0 | break; |
1146 | 0 | case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; |
1147 | 0 | break; |
1148 | 0 | case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; |
1149 | 0 | break; |
1150 | 0 | case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; |
1151 | 0 | break; |
1152 | 0 | case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; |
1153 | 0 | break; |
1154 | 0 | case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; |
1155 | 0 | break; |
1156 | 0 | case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; |
1157 | 0 | break; |
1158 | 0 | case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; |
1159 | 0 | break; |
1160 | 0 | case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; |
1161 | 0 | break; |
1162 | 0 | case BFD_RELOC_PPC64_TLS_PCREL: |
1163 | 0 | case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; |
1164 | 0 | break; |
1165 | 0 | case BFD_RELOC_PPC_TLSGD: r = R_PPC64_TLSGD; |
1166 | 0 | break; |
1167 | 0 | case BFD_RELOC_PPC_TLSLD: r = R_PPC64_TLSLD; |
1168 | 0 | break; |
1169 | 0 | case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; |
1170 | 0 | break; |
1171 | 0 | case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; |
1172 | 0 | break; |
1173 | 0 | case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; |
1174 | 0 | break; |
1175 | 0 | case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; |
1176 | 0 | break; |
1177 | 0 | case BFD_RELOC_PPC64_TPREL16_HIGH: r = R_PPC64_TPREL16_HIGH; |
1178 | 0 | break; |
1179 | 0 | case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; |
1180 | 0 | break; |
1181 | 0 | case BFD_RELOC_PPC64_TPREL16_HIGHA: r = R_PPC64_TPREL16_HIGHA; |
1182 | 0 | break; |
1183 | 0 | case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; |
1184 | 0 | break; |
1185 | 0 | case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; |
1186 | 0 | break; |
1187 | 0 | case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; |
1188 | 0 | break; |
1189 | 0 | case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; |
1190 | 0 | break; |
1191 | 0 | case BFD_RELOC_PPC64_DTPREL16_HIGH: r = R_PPC64_DTPREL16_HIGH; |
1192 | 0 | break; |
1193 | 0 | case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; |
1194 | 0 | break; |
1195 | 0 | case BFD_RELOC_PPC64_DTPREL16_HIGHA: r = R_PPC64_DTPREL16_HIGHA; |
1196 | 0 | break; |
1197 | 0 | case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; |
1198 | 0 | break; |
1199 | 0 | case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; |
1200 | 0 | break; |
1201 | 0 | case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; |
1202 | 0 | break; |
1203 | 0 | case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; |
1204 | 0 | break; |
1205 | 0 | case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; |
1206 | 0 | break; |
1207 | 0 | case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; |
1208 | 0 | break; |
1209 | 0 | case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; |
1210 | 0 | break; |
1211 | 0 | case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; |
1212 | 0 | break; |
1213 | 0 | case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; |
1214 | 0 | break; |
1215 | 0 | case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; |
1216 | 0 | break; |
1217 | 0 | case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; |
1218 | 0 | break; |
1219 | 0 | case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; |
1220 | 0 | break; |
1221 | 0 | case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; |
1222 | 0 | break; |
1223 | 0 | case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; |
1224 | 0 | break; |
1225 | 0 | case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; |
1226 | 0 | break; |
1227 | 0 | case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; |
1228 | 0 | break; |
1229 | 0 | case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; |
1230 | 0 | break; |
1231 | 0 | case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; |
1232 | 0 | break; |
1233 | 0 | case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; |
1234 | 0 | break; |
1235 | 0 | case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; |
1236 | 0 | break; |
1237 | 0 | case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; |
1238 | 0 | break; |
1239 | 0 | case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; |
1240 | 0 | break; |
1241 | 0 | case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; |
1242 | 0 | break; |
1243 | 0 | case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; |
1244 | 0 | break; |
1245 | 0 | case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; |
1246 | 0 | break; |
1247 | 0 | case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; |
1248 | 0 | break; |
1249 | 0 | case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; |
1250 | 0 | break; |
1251 | 0 | case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; |
1252 | 0 | break; |
1253 | 0 | case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; |
1254 | 0 | break; |
1255 | 0 | case BFD_RELOC_16_PCREL: r = R_PPC64_REL16; |
1256 | 0 | break; |
1257 | 0 | case BFD_RELOC_LO16_PCREL: r = R_PPC64_REL16_LO; |
1258 | 0 | break; |
1259 | 0 | case BFD_RELOC_HI16_PCREL: r = R_PPC64_REL16_HI; |
1260 | 0 | break; |
1261 | 0 | case BFD_RELOC_HI16_S_PCREL: r = R_PPC64_REL16_HA; |
1262 | 0 | break; |
1263 | 0 | case BFD_RELOC_PPC64_REL16_HIGH: r = R_PPC64_REL16_HIGH; |
1264 | 0 | break; |
1265 | 0 | case BFD_RELOC_PPC64_REL16_HIGHA: r = R_PPC64_REL16_HIGHA; |
1266 | 0 | break; |
1267 | 0 | case BFD_RELOC_PPC64_REL16_HIGHER: r = R_PPC64_REL16_HIGHER; |
1268 | 0 | break; |
1269 | 0 | case BFD_RELOC_PPC64_REL16_HIGHERA: r = R_PPC64_REL16_HIGHERA; |
1270 | 0 | break; |
1271 | 0 | case BFD_RELOC_PPC64_REL16_HIGHEST: r = R_PPC64_REL16_HIGHEST; |
1272 | 0 | break; |
1273 | 0 | case BFD_RELOC_PPC64_REL16_HIGHESTA: r = R_PPC64_REL16_HIGHESTA; |
1274 | 0 | break; |
1275 | 0 | case BFD_RELOC_PPC_16DX_HA: r = R_PPC64_16DX_HA; |
1276 | 0 | break; |
1277 | 0 | case BFD_RELOC_PPC_REL16DX_HA: r = R_PPC64_REL16DX_HA; |
1278 | 0 | break; |
1279 | 0 | case BFD_RELOC_PPC64_ENTRY: r = R_PPC64_ENTRY; |
1280 | 0 | break; |
1281 | 0 | case BFD_RELOC_PPC64_ADDR64_LOCAL: r = R_PPC64_ADDR64_LOCAL; |
1282 | 0 | break; |
1283 | 0 | case BFD_RELOC_PPC64_D34: r = R_PPC64_D34; |
1284 | 0 | break; |
1285 | 0 | case BFD_RELOC_PPC64_D34_LO: r = R_PPC64_D34_LO; |
1286 | 0 | break; |
1287 | 0 | case BFD_RELOC_PPC64_D34_HI30: r = R_PPC64_D34_HI30; |
1288 | 0 | break; |
1289 | 0 | case BFD_RELOC_PPC64_D34_HA30: r = R_PPC64_D34_HA30; |
1290 | 0 | break; |
1291 | 0 | case BFD_RELOC_PPC64_PCREL34: r = R_PPC64_PCREL34; |
1292 | 0 | break; |
1293 | 0 | case BFD_RELOC_PPC64_GOT_PCREL34: r = R_PPC64_GOT_PCREL34; |
1294 | 0 | break; |
1295 | 0 | case BFD_RELOC_PPC64_PLT_PCREL34: r = R_PPC64_PLT_PCREL34; |
1296 | 0 | break; |
1297 | 0 | case BFD_RELOC_PPC64_TPREL34: r = R_PPC64_TPREL34; |
1298 | 0 | break; |
1299 | 0 | case BFD_RELOC_PPC64_DTPREL34: r = R_PPC64_DTPREL34; |
1300 | 0 | break; |
1301 | 0 | case BFD_RELOC_PPC64_GOT_TLSGD_PCREL34: r = R_PPC64_GOT_TLSGD_PCREL34; |
1302 | 0 | break; |
1303 | 0 | case BFD_RELOC_PPC64_GOT_TLSLD_PCREL34: r = R_PPC64_GOT_TLSLD_PCREL34; |
1304 | 0 | break; |
1305 | 0 | case BFD_RELOC_PPC64_GOT_TPREL_PCREL34: r = R_PPC64_GOT_TPREL_PCREL34; |
1306 | 0 | break; |
1307 | 0 | case BFD_RELOC_PPC64_GOT_DTPREL_PCREL34: r = R_PPC64_GOT_DTPREL_PCREL34; |
1308 | 0 | break; |
1309 | 0 | case BFD_RELOC_PPC64_ADDR16_HIGHER34: r = R_PPC64_ADDR16_HIGHER34; |
1310 | 0 | break; |
1311 | 0 | case BFD_RELOC_PPC64_ADDR16_HIGHERA34: r = R_PPC64_ADDR16_HIGHERA34; |
1312 | 0 | break; |
1313 | 0 | case BFD_RELOC_PPC64_ADDR16_HIGHEST34: r = R_PPC64_ADDR16_HIGHEST34; |
1314 | 0 | break; |
1315 | 0 | case BFD_RELOC_PPC64_ADDR16_HIGHESTA34: r = R_PPC64_ADDR16_HIGHESTA34; |
1316 | 0 | break; |
1317 | 0 | case BFD_RELOC_PPC64_REL16_HIGHER34: r = R_PPC64_REL16_HIGHER34; |
1318 | 0 | break; |
1319 | 0 | case BFD_RELOC_PPC64_REL16_HIGHERA34: r = R_PPC64_REL16_HIGHERA34; |
1320 | 0 | break; |
1321 | 0 | case BFD_RELOC_PPC64_REL16_HIGHEST34: r = R_PPC64_REL16_HIGHEST34; |
1322 | 0 | break; |
1323 | 0 | case BFD_RELOC_PPC64_REL16_HIGHESTA34: r = R_PPC64_REL16_HIGHESTA34; |
1324 | 0 | break; |
1325 | 0 | case BFD_RELOC_PPC64_D28: r = R_PPC64_D28; |
1326 | 0 | break; |
1327 | 0 | case BFD_RELOC_PPC64_PCREL28: r = R_PPC64_PCREL28; |
1328 | 0 | break; |
1329 | 0 | case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; |
1330 | 0 | break; |
1331 | 0 | case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; |
1332 | 0 | break; |
1333 | 0 | } |
1334 | | |
1335 | 0 | return ppc64_elf_howto_table[r]; |
1336 | 0 | }; |
1337 | | |
1338 | | static reloc_howto_type * |
1339 | | ppc64_elf_reloc_name_lookup (bfd *abfd, const char *r_name) |
1340 | 0 | { |
1341 | 0 | unsigned int i; |
1342 | 0 | static char *compat_map[][2] = { |
1343 | 0 | { "R_PPC64_GOT_TLSGD34", "R_PPC64_GOT_TLSGD_PCREL34" }, |
1344 | 0 | { "R_PPC64_GOT_TLSLD34", "R_PPC64_GOT_TLSLD_PCREL34" }, |
1345 | 0 | { "R_PPC64_GOT_TPREL34", "R_PPC64_GOT_TPREL_PCREL34" }, |
1346 | 0 | { "R_PPC64_GOT_DTPREL34", "R_PPC64_GOT_DTPREL_PCREL34" } |
1347 | 0 | }; |
1348 | |
|
1349 | 0 | for (i = 0; i < ARRAY_SIZE (ppc64_elf_howto_raw); i++) |
1350 | 0 | if (ppc64_elf_howto_raw[i].name != NULL |
1351 | 0 | && strcasecmp (ppc64_elf_howto_raw[i].name, r_name) == 0) |
1352 | 0 | return &ppc64_elf_howto_raw[i]; |
1353 | | |
1354 | | /* Handle old names of relocations in case they were used by |
1355 | | .reloc directives. |
1356 | | FIXME: Remove this soon. Mapping the reloc names is very likely |
1357 | | completely unnecessary. */ |
1358 | 0 | for (i = 0; i < ARRAY_SIZE (compat_map); i++) |
1359 | 0 | if (strcasecmp (compat_map[i][0], r_name) == 0) |
1360 | 0 | { |
1361 | 0 | _bfd_error_handler (_("warning: %s should be used rather than %s"), |
1362 | 0 | compat_map[i][1], compat_map[i][0]); |
1363 | 0 | return ppc64_elf_reloc_name_lookup (abfd, compat_map[i][1]); |
1364 | 0 | } |
1365 | | |
1366 | 0 | return NULL; |
1367 | 0 | } |
1368 | | |
1369 | | /* Set the howto pointer for a PowerPC ELF reloc. */ |
1370 | | |
1371 | | static bool |
1372 | | ppc64_elf_info_to_howto (bfd *abfd, arelent *cache_ptr, |
1373 | | Elf_Internal_Rela *dst) |
1374 | 978 | { |
1375 | 978 | unsigned int type; |
1376 | | |
1377 | | /* Initialize howto table if needed. */ |
1378 | 978 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
1379 | 4 | ppc_howto_init (); |
1380 | | |
1381 | 978 | type = ELF64_R_TYPE (dst->r_info); |
1382 | 978 | if (type >= ARRAY_SIZE (ppc64_elf_howto_table)) |
1383 | 24 | { |
1384 | | /* xgettext:c-format */ |
1385 | 24 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
1386 | 24 | abfd, type); |
1387 | 24 | bfd_set_error (bfd_error_bad_value); |
1388 | 24 | return false; |
1389 | 24 | } |
1390 | 954 | cache_ptr->howto = ppc64_elf_howto_table[type]; |
1391 | 954 | if (cache_ptr->howto == NULL || cache_ptr->howto->name == NULL) |
1392 | 24 | { |
1393 | | /* xgettext:c-format */ |
1394 | 24 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
1395 | 24 | abfd, type); |
1396 | 24 | bfd_set_error (bfd_error_bad_value); |
1397 | 24 | return false; |
1398 | 24 | } |
1399 | | |
1400 | 930 | return true; |
1401 | 954 | } |
1402 | | |
1403 | | /* Handle the R_PPC64_ADDR16_HA and similar relocs. */ |
1404 | | |
1405 | | static bfd_reloc_status_type |
1406 | | ppc64_elf_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1407 | | void *data, asection *input_section, |
1408 | | bfd *output_bfd, char **error_message) |
1409 | 20 | { |
1410 | 20 | enum elf_ppc64_reloc_type r_type; |
1411 | 20 | long insn; |
1412 | 20 | bfd_size_type octets; |
1413 | 20 | bfd_vma value; |
1414 | | |
1415 | | /* If this is a relocatable link (output_bfd test tells us), just |
1416 | | call the generic function. Any adjustment will be done at final |
1417 | | link time. */ |
1418 | 20 | if (output_bfd != NULL) |
1419 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1420 | 0 | input_section, output_bfd, error_message); |
1421 | | |
1422 | | /* Adjust the addend for sign extension of the low 16 (or 34) bits. |
1423 | | We won't actually be using the low bits, so trashing them |
1424 | | doesn't matter. */ |
1425 | 20 | r_type = reloc_entry->howto->type; |
1426 | 20 | if (r_type == R_PPC64_ADDR16_HIGHERA34 |
1427 | 20 | || r_type == R_PPC64_ADDR16_HIGHESTA34 |
1428 | 20 | || r_type == R_PPC64_REL16_HIGHERA34 |
1429 | 20 | || r_type == R_PPC64_REL16_HIGHESTA34) |
1430 | 19 | reloc_entry->addend += 1ULL << 33; |
1431 | 1 | else |
1432 | 1 | reloc_entry->addend += 1U << 15; |
1433 | 20 | if (r_type != R_PPC64_REL16DX_HA) |
1434 | 20 | return bfd_reloc_continue; |
1435 | | |
1436 | 0 | value = 0; |
1437 | 0 | if (!bfd_is_com_section (symbol->section)) |
1438 | 0 | value = symbol->value; |
1439 | 0 | value += (reloc_entry->addend |
1440 | 0 | + symbol->section->output_offset |
1441 | 0 | + symbol->section->output_section->vma); |
1442 | 0 | value -= (reloc_entry->address |
1443 | 0 | + input_section->output_offset |
1444 | 0 | + input_section->output_section->vma); |
1445 | 0 | value = (bfd_signed_vma) value >> 16; |
1446 | |
|
1447 | 0 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
1448 | 0 | if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd, |
1449 | 0 | input_section, octets)) |
1450 | 0 | return bfd_reloc_outofrange; |
1451 | | |
1452 | 0 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
1453 | 0 | insn &= ~0x1fffc1; |
1454 | 0 | insn |= (value & 0xffc1) | ((value & 0x3e) << 15); |
1455 | 0 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
1456 | 0 | if (value + 0x8000 > 0xffff) |
1457 | 0 | return bfd_reloc_overflow; |
1458 | 0 | return bfd_reloc_ok; |
1459 | 0 | } |
1460 | | |
1461 | | static bfd_reloc_status_type |
1462 | | ppc64_elf_branch_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1463 | | void *data, asection *input_section, |
1464 | | bfd *output_bfd, char **error_message) |
1465 | 122 | { |
1466 | 122 | if (output_bfd != NULL) |
1467 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1468 | 0 | input_section, output_bfd, error_message); |
1469 | | |
1470 | 122 | if (symbol->section->owner == NULL |
1471 | 122 | || !is_ppc64_elf (symbol->section->owner)) |
1472 | 45 | return bfd_reloc_continue; |
1473 | | |
1474 | 77 | if (strcmp (symbol->section->name, ".opd") == 0 |
1475 | 77 | && (symbol->section->owner->flags & DYNAMIC) == 0) |
1476 | 0 | { |
1477 | 0 | bfd_vma dest = opd_entry_value (symbol->section, |
1478 | 0 | symbol->value + reloc_entry->addend, |
1479 | 0 | NULL, NULL, false); |
1480 | 0 | if (dest != (bfd_vma) -1) |
1481 | 0 | reloc_entry->addend = dest - (symbol->value |
1482 | 0 | + symbol->section->output_section->vma |
1483 | 0 | + symbol->section->output_offset); |
1484 | 0 | } |
1485 | 77 | else |
1486 | 77 | { |
1487 | 77 | elf_symbol_type *elfsym = (elf_symbol_type *) symbol; |
1488 | | |
1489 | 77 | if (symbol->section->owner != abfd |
1490 | 77 | && abiversion (symbol->section->owner) >= 2) |
1491 | 0 | { |
1492 | 0 | unsigned int i; |
1493 | |
|
1494 | 0 | for (i = 0; i < symbol->section->owner->symcount; ++i) |
1495 | 0 | { |
1496 | 0 | asymbol *symdef = symbol->section->owner->outsymbols[i]; |
1497 | |
|
1498 | 0 | if (strcmp (symdef->name, symbol->name) == 0) |
1499 | 0 | { |
1500 | 0 | elfsym = (elf_symbol_type *) symdef; |
1501 | 0 | break; |
1502 | 0 | } |
1503 | 0 | } |
1504 | 0 | } |
1505 | 77 | reloc_entry->addend |
1506 | 77 | += PPC64_LOCAL_ENTRY_OFFSET (elfsym->internal_elf_sym.st_other); |
1507 | 77 | } |
1508 | 77 | return bfd_reloc_continue; |
1509 | 122 | } |
1510 | | |
1511 | | static bfd_reloc_status_type |
1512 | | ppc64_elf_brtaken_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1513 | | void *data, asection *input_section, |
1514 | | bfd *output_bfd, char **error_message) |
1515 | 32 | { |
1516 | 32 | long insn; |
1517 | 32 | enum elf_ppc64_reloc_type r_type; |
1518 | 32 | bfd_size_type octets; |
1519 | | /* Assume 'at' branch hints. */ |
1520 | 32 | bool is_isa_v2 = true; |
1521 | | |
1522 | | /* If this is a relocatable link (output_bfd test tells us), just |
1523 | | call the generic function. Any adjustment will be done at final |
1524 | | link time. */ |
1525 | 32 | if (output_bfd != NULL) |
1526 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1527 | 0 | input_section, output_bfd, error_message); |
1528 | | |
1529 | 32 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
1530 | 32 | if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd, |
1531 | 32 | input_section, octets)) |
1532 | 1 | return bfd_reloc_outofrange; |
1533 | | |
1534 | 31 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
1535 | 31 | insn &= ~(0x01 << 21); |
1536 | 31 | r_type = reloc_entry->howto->type; |
1537 | 31 | if (r_type == R_PPC64_ADDR14_BRTAKEN |
1538 | 31 | || r_type == R_PPC64_REL14_BRTAKEN) |
1539 | 29 | insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
1540 | | |
1541 | 31 | if (is_isa_v2) |
1542 | 31 | { |
1543 | | /* Set 'a' bit. This is 0b00010 in BO field for branch |
1544 | | on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
1545 | | for branch on CTR insns (BO == 1a00t or 1a01t). */ |
1546 | 31 | if ((insn & (0x14 << 21)) == (0x04 << 21)) |
1547 | 14 | insn |= 0x02 << 21; |
1548 | 17 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
1549 | 2 | insn |= 0x08 << 21; |
1550 | 15 | else |
1551 | 15 | goto out; |
1552 | 31 | } |
1553 | 0 | else |
1554 | 0 | { |
1555 | 0 | bfd_vma target = 0; |
1556 | 0 | bfd_vma from; |
1557 | |
|
1558 | 0 | if (!bfd_is_com_section (symbol->section)) |
1559 | 0 | target = symbol->value; |
1560 | 0 | target += symbol->section->output_section->vma; |
1561 | 0 | target += symbol->section->output_offset; |
1562 | 0 | target += reloc_entry->addend; |
1563 | |
|
1564 | 0 | from = (reloc_entry->address |
1565 | 0 | + input_section->output_offset |
1566 | 0 | + input_section->output_section->vma); |
1567 | | |
1568 | | /* Invert 'y' bit if not the default. */ |
1569 | 0 | if ((bfd_signed_vma) (target - from) < 0) |
1570 | 0 | insn ^= 0x01 << 21; |
1571 | 0 | } |
1572 | 16 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets); |
1573 | 31 | out: |
1574 | 31 | return ppc64_elf_branch_reloc (abfd, reloc_entry, symbol, data, |
1575 | 31 | input_section, output_bfd, error_message); |
1576 | 16 | } |
1577 | | |
1578 | | static bfd_reloc_status_type |
1579 | | ppc64_elf_sectoff_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1580 | | void *data, asection *input_section, |
1581 | | bfd *output_bfd, char **error_message) |
1582 | 14 | { |
1583 | | /* If this is a relocatable link (output_bfd test tells us), just |
1584 | | call the generic function. Any adjustment will be done at final |
1585 | | link time. */ |
1586 | 14 | if (output_bfd != NULL) |
1587 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1588 | 0 | input_section, output_bfd, error_message); |
1589 | | |
1590 | | /* Subtract the symbol section base address. */ |
1591 | 14 | reloc_entry->addend -= symbol->section->output_section->vma; |
1592 | 14 | return bfd_reloc_continue; |
1593 | 14 | } |
1594 | | |
1595 | | static bfd_reloc_status_type |
1596 | | ppc64_elf_sectoff_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1597 | | void *data, asection *input_section, |
1598 | | bfd *output_bfd, char **error_message) |
1599 | 16 | { |
1600 | | /* If this is a relocatable link (output_bfd test tells us), just |
1601 | | call the generic function. Any adjustment will be done at final |
1602 | | link time. */ |
1603 | 16 | if (output_bfd != NULL) |
1604 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1605 | 0 | input_section, output_bfd, error_message); |
1606 | | |
1607 | | /* Subtract the symbol section base address. */ |
1608 | 16 | reloc_entry->addend -= symbol->section->output_section->vma; |
1609 | | |
1610 | | /* Adjust the addend for sign extension of the low 16 bits. */ |
1611 | 16 | reloc_entry->addend += 0x8000; |
1612 | 16 | return bfd_reloc_continue; |
1613 | 16 | } |
1614 | | |
1615 | | static bfd_reloc_status_type |
1616 | | ppc64_elf_toc_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1617 | | void *data, asection *input_section, |
1618 | | bfd *output_bfd, char **error_message) |
1619 | 22 | { |
1620 | 22 | bfd_vma TOCstart; |
1621 | | |
1622 | | /* If this is a relocatable link (output_bfd test tells us), just |
1623 | | call the generic function. Any adjustment will be done at final |
1624 | | link time. */ |
1625 | 22 | if (output_bfd != NULL) |
1626 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1627 | 0 | input_section, output_bfd, error_message); |
1628 | | |
1629 | 22 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
1630 | 22 | if (TOCstart == 0) |
1631 | 21 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
1632 | | |
1633 | | /* Subtract the TOC base address. */ |
1634 | 22 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
1635 | 22 | return bfd_reloc_continue; |
1636 | 22 | } |
1637 | | |
1638 | | static bfd_reloc_status_type |
1639 | | ppc64_elf_toc_ha_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1640 | | void *data, asection *input_section, |
1641 | | bfd *output_bfd, char **error_message) |
1642 | 5 | { |
1643 | 5 | bfd_vma TOCstart; |
1644 | | |
1645 | | /* If this is a relocatable link (output_bfd test tells us), just |
1646 | | call the generic function. Any adjustment will be done at final |
1647 | | link time. */ |
1648 | 5 | if (output_bfd != NULL) |
1649 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1650 | 0 | input_section, output_bfd, error_message); |
1651 | | |
1652 | 5 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
1653 | 5 | if (TOCstart == 0) |
1654 | 4 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
1655 | | |
1656 | | /* Subtract the TOC base address. */ |
1657 | 5 | reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
1658 | | |
1659 | | /* Adjust the addend for sign extension of the low 16 bits. */ |
1660 | 5 | reloc_entry->addend += 0x8000; |
1661 | 5 | return bfd_reloc_continue; |
1662 | 5 | } |
1663 | | |
1664 | | static bfd_reloc_status_type |
1665 | | ppc64_elf_toc64_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1666 | | void *data, asection *input_section, |
1667 | | bfd *output_bfd, char **error_message) |
1668 | 0 | { |
1669 | 0 | bfd_vma TOCstart; |
1670 | 0 | bfd_size_type octets; |
1671 | | |
1672 | | /* If this is a relocatable link (output_bfd test tells us), just |
1673 | | call the generic function. Any adjustment will be done at final |
1674 | | link time. */ |
1675 | 0 | if (output_bfd != NULL) |
1676 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1677 | 0 | input_section, output_bfd, error_message); |
1678 | | |
1679 | 0 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
1680 | 0 | if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd, |
1681 | 0 | input_section, octets)) |
1682 | 0 | return bfd_reloc_outofrange; |
1683 | | |
1684 | 0 | TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
1685 | 0 | if (TOCstart == 0) |
1686 | 0 | TOCstart = ppc64_elf_set_toc (NULL, input_section->output_section->owner); |
1687 | |
|
1688 | 0 | bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); |
1689 | 0 | return bfd_reloc_ok; |
1690 | 0 | } |
1691 | | |
1692 | | static bfd_reloc_status_type |
1693 | | ppc64_elf_prefix_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1694 | | void *data, asection *input_section, |
1695 | | bfd *output_bfd, char **error_message) |
1696 | 2 | { |
1697 | 2 | uint64_t insn; |
1698 | 2 | bfd_vma targ; |
1699 | 2 | bfd_size_type octets; |
1700 | | |
1701 | 2 | if (output_bfd != NULL) |
1702 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1703 | 0 | input_section, output_bfd, error_message); |
1704 | | |
1705 | 2 | octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section); |
1706 | 2 | if (!bfd_reloc_offset_in_range (reloc_entry->howto, abfd, |
1707 | 2 | input_section, octets)) |
1708 | 1 | return bfd_reloc_outofrange; |
1709 | | |
1710 | 1 | insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
1711 | 1 | insn <<= 32; |
1712 | 1 | insn |= bfd_get_32 (abfd, (bfd_byte *) data + octets + 4); |
1713 | | |
1714 | 1 | targ = (symbol->section->output_section->vma |
1715 | 1 | + symbol->section->output_offset |
1716 | 1 | + reloc_entry->addend); |
1717 | 1 | if (!bfd_is_com_section (symbol->section)) |
1718 | 1 | targ += symbol->value; |
1719 | 1 | if (reloc_entry->howto->type == R_PPC64_D34_HA30) |
1720 | 0 | targ += 1ULL << 33; |
1721 | 1 | if (reloc_entry->howto->pc_relative) |
1722 | 0 | { |
1723 | 0 | bfd_vma from = (reloc_entry->address |
1724 | 0 | + input_section->output_offset |
1725 | 0 | + input_section->output_section->vma); |
1726 | 0 | targ -=from; |
1727 | 0 | } |
1728 | 1 | targ >>= reloc_entry->howto->rightshift; |
1729 | 1 | insn &= ~reloc_entry->howto->dst_mask; |
1730 | 1 | insn |= ((targ << 16) | (targ & 0xffff)) & reloc_entry->howto->dst_mask; |
1731 | 1 | bfd_put_32 (abfd, insn >> 32, (bfd_byte *) data + octets); |
1732 | 1 | bfd_put_32 (abfd, insn, (bfd_byte *) data + octets + 4); |
1733 | 1 | if (reloc_entry->howto->complain_on_overflow == complain_overflow_signed |
1734 | 1 | && (targ + (1ULL << (reloc_entry->howto->bitsize - 1)) |
1735 | 1 | >= 1ULL << reloc_entry->howto->bitsize)) |
1736 | 0 | return bfd_reloc_overflow; |
1737 | 1 | return bfd_reloc_ok; |
1738 | 1 | } |
1739 | | |
1740 | | static bfd_reloc_status_type |
1741 | | ppc64_elf_unhandled_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol, |
1742 | | void *data, asection *input_section, |
1743 | | bfd *output_bfd, char **error_message) |
1744 | 34 | { |
1745 | | /* If this is a relocatable link (output_bfd test tells us), just |
1746 | | call the generic function. Any adjustment will be done at final |
1747 | | link time. */ |
1748 | 34 | if (output_bfd != NULL) |
1749 | 0 | return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
1750 | 0 | input_section, output_bfd, error_message); |
1751 | | |
1752 | 34 | if (error_message != NULL) |
1753 | 34 | *error_message = bfd_asprintf (_("generic linker can't handle %s"), |
1754 | 34 | reloc_entry->howto->name); |
1755 | 34 | return bfd_reloc_dangerous; |
1756 | 34 | } |
1757 | | |
1758 | | /* Track GOT entries needed for a given symbol. We might need more |
1759 | | than one got entry per symbol. */ |
1760 | | struct got_entry |
1761 | | { |
1762 | | struct got_entry *next; |
1763 | | |
1764 | | /* The symbol addend that we'll be placing in the GOT. */ |
1765 | | bfd_vma addend; |
1766 | | |
1767 | | /* Unlike other ELF targets, we use separate GOT entries for the same |
1768 | | symbol referenced from different input files. This is to support |
1769 | | automatic multiple TOC/GOT sections, where the TOC base can vary |
1770 | | from one input file to another. After partitioning into TOC groups |
1771 | | we merge entries within the group. |
1772 | | |
1773 | | Point to the BFD owning this GOT entry. */ |
1774 | | bfd *owner; |
1775 | | |
1776 | | /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, |
1777 | | TLS_TPREL or TLS_DTPREL for tls entries. */ |
1778 | | unsigned char tls_type; |
1779 | | |
1780 | | /* Non-zero if got.ent points to real entry. */ |
1781 | | unsigned char is_indirect; |
1782 | | |
1783 | | /* Reference count until size_dynamic_sections, GOT offset thereafter. */ |
1784 | | union |
1785 | | { |
1786 | | bfd_signed_vma refcount; |
1787 | | bfd_vma offset; |
1788 | | struct got_entry *ent; |
1789 | | } got; |
1790 | | }; |
1791 | | |
1792 | | /* The same for PLT. */ |
1793 | | struct plt_entry |
1794 | | { |
1795 | | struct plt_entry *next; |
1796 | | |
1797 | | bfd_vma addend; |
1798 | | |
1799 | | union |
1800 | | { |
1801 | | bfd_signed_vma refcount; |
1802 | | bfd_vma offset; |
1803 | | } plt; |
1804 | | }; |
1805 | | |
1806 | | struct ppc64_elf_obj_tdata |
1807 | | { |
1808 | | struct elf_obj_tdata elf; |
1809 | | |
1810 | | /* Shortcuts to dynamic linker sections. */ |
1811 | | asection *got; |
1812 | | asection *relgot; |
1813 | | |
1814 | | /* Used during garbage collection. We attach global symbols defined |
1815 | | on removed .opd entries to this section so that the sym is removed. */ |
1816 | | asection *deleted_section; |
1817 | | |
1818 | | /* TLS local dynamic got entry handling. Support for multiple GOT |
1819 | | sections means we potentially need one of these for each input bfd. */ |
1820 | | struct got_entry tlsld_got; |
1821 | | |
1822 | | /* Nonzero if this bfd has small toc/got relocs, ie. that expect |
1823 | | the reloc to be in the range -32768 to 32767. */ |
1824 | | unsigned int has_small_toc_reloc : 1; |
1825 | | |
1826 | | /* Set if toc/got ha relocs detected not using r2, or lo reloc |
1827 | | instruction not one we handle. */ |
1828 | | unsigned int unexpected_toc_insn : 1; |
1829 | | |
1830 | | /* Set if PLT/GOT/TOC relocs that can be optimised are present in |
1831 | | this file. */ |
1832 | | unsigned int has_optrel : 1; |
1833 | | }; |
1834 | | |
1835 | | #define ppc64_elf_tdata(bfd) \ |
1836 | 0 | ((struct ppc64_elf_obj_tdata *) (bfd)->tdata.any) |
1837 | | |
1838 | | #define ppc64_tlsld_got(bfd) \ |
1839 | 0 | (&ppc64_elf_tdata (bfd)->tlsld_got) |
1840 | | |
1841 | | /* Override the generic function because we store some extras. */ |
1842 | | |
1843 | | static bool |
1844 | | ppc64_elf_mkobject (bfd *abfd) |
1845 | 569k | { |
1846 | 569k | return bfd_elf_allocate_object (abfd, sizeof (struct ppc64_elf_obj_tdata)); |
1847 | 569k | } |
1848 | | |
1849 | | /* Fix bad default arch selected for a 64 bit input bfd when the |
1850 | | default is 32 bit. Also select arch based on apuinfo. */ |
1851 | | |
1852 | | static bool |
1853 | | ppc64_elf_object_p (bfd *abfd) |
1854 | 10.7k | { |
1855 | 10.7k | if (!abfd->arch_info->the_default) |
1856 | 0 | return true; |
1857 | | |
1858 | 10.7k | if (abfd->arch_info->bits_per_word == 32) |
1859 | 0 | { |
1860 | 0 | Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
1861 | |
|
1862 | 0 | if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) |
1863 | 0 | { |
1864 | | /* Relies on arch after 32 bit default being 64 bit default. */ |
1865 | 0 | abfd->arch_info = abfd->arch_info->next; |
1866 | 0 | BFD_ASSERT (abfd->arch_info->bits_per_word == 64); |
1867 | 0 | } |
1868 | 0 | } |
1869 | 10.7k | return _bfd_elf_ppc_set_arch (abfd); |
1870 | 10.7k | } |
1871 | | |
1872 | | /* Support for core dump NOTE sections. */ |
1873 | | |
1874 | | static bool |
1875 | | ppc64_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
1876 | 40 | { |
1877 | 40 | size_t offset, size; |
1878 | | |
1879 | 40 | if (note->descsz != 504) |
1880 | 40 | return false; |
1881 | | |
1882 | | /* pr_cursig */ |
1883 | 0 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
1884 | | |
1885 | | /* pr_pid */ |
1886 | 0 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32); |
1887 | | |
1888 | | /* pr_reg */ |
1889 | 0 | offset = 112; |
1890 | 0 | size = 384; |
1891 | | |
1892 | | /* Make a ".reg/999" section. */ |
1893 | 0 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", |
1894 | 0 | size, note->descpos + offset); |
1895 | 40 | } |
1896 | | |
1897 | | static bool |
1898 | | ppc64_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
1899 | 35 | { |
1900 | 35 | if (note->descsz != 136) |
1901 | 35 | return false; |
1902 | | |
1903 | 0 | elf_tdata (abfd)->core->pid |
1904 | 0 | = bfd_get_32 (abfd, note->descdata + 24); |
1905 | 0 | elf_tdata (abfd)->core->program |
1906 | 0 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); |
1907 | 0 | elf_tdata (abfd)->core->command |
1908 | 0 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); |
1909 | |
|
1910 | 0 | return true; |
1911 | 35 | } |
1912 | | |
1913 | | static char * |
1914 | | ppc64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, |
1915 | | ...) |
1916 | 0 | { |
1917 | 0 | switch (note_type) |
1918 | 0 | { |
1919 | 0 | default: |
1920 | 0 | return NULL; |
1921 | | |
1922 | 0 | case NT_PRPSINFO: |
1923 | 0 | { |
1924 | 0 | char data[136] ATTRIBUTE_NONSTRING; |
1925 | 0 | va_list ap; |
1926 | |
|
1927 | 0 | va_start (ap, note_type); |
1928 | 0 | memset (data, 0, sizeof (data)); |
1929 | 0 | strncpy (data + 40, va_arg (ap, const char *), 16); |
1930 | | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
1931 | | DIAGNOSTIC_PUSH; |
1932 | | /* GCC 8.0 and 8.1 warn about 80 equals destination size with |
1933 | | -Wstringop-truncation: |
1934 | | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 |
1935 | | */ |
1936 | | DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; |
1937 | | #endif |
1938 | 0 | strncpy (data + 56, va_arg (ap, const char *), 80); |
1939 | | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 |
1940 | | DIAGNOSTIC_POP; |
1941 | | #endif |
1942 | 0 | va_end (ap); |
1943 | 0 | return elfcore_write_note (abfd, buf, bufsiz, |
1944 | 0 | "CORE", note_type, data, sizeof (data)); |
1945 | 0 | } |
1946 | | |
1947 | 0 | case NT_PRSTATUS: |
1948 | 0 | { |
1949 | 0 | char data[504]; |
1950 | 0 | va_list ap; |
1951 | 0 | long pid; |
1952 | 0 | int cursig; |
1953 | 0 | const void *greg; |
1954 | |
|
1955 | 0 | va_start (ap, note_type); |
1956 | 0 | memset (data, 0, 112); |
1957 | 0 | pid = va_arg (ap, long); |
1958 | 0 | bfd_put_32 (abfd, pid, data + 32); |
1959 | 0 | cursig = va_arg (ap, int); |
1960 | 0 | bfd_put_16 (abfd, cursig, data + 12); |
1961 | 0 | greg = va_arg (ap, const void *); |
1962 | 0 | memcpy (data + 112, greg, 384); |
1963 | 0 | memset (data + 496, 0, 8); |
1964 | 0 | va_end (ap); |
1965 | 0 | return elfcore_write_note (abfd, buf, bufsiz, |
1966 | 0 | "CORE", note_type, data, sizeof (data)); |
1967 | 0 | } |
1968 | 0 | } |
1969 | 0 | } |
1970 | | |
1971 | | /* Add extra PPC sections. */ |
1972 | | |
1973 | | static const struct bfd_elf_special_section ppc64_elf_special_sections[] = |
1974 | | { |
1975 | | { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, 0 }, |
1976 | | { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
1977 | | { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
1978 | | { STRING_COMMA_LEN (".toc"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
1979 | | { STRING_COMMA_LEN (".toc1"), 0, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, |
1980 | | { STRING_COMMA_LEN (".tocbss"), 0, SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, |
1981 | | { NULL, 0, 0, 0, 0 } |
1982 | | }; |
1983 | | |
1984 | | enum _ppc64_sec_type { |
1985 | | sec_normal = 0, |
1986 | | sec_opd = 1, |
1987 | | sec_toc = 2, |
1988 | | sec_stub = 3 |
1989 | | }; |
1990 | | |
1991 | | struct _ppc64_elf_section_data |
1992 | | { |
1993 | | struct bfd_elf_section_data elf; |
1994 | | |
1995 | | union |
1996 | | { |
1997 | | /* An array with one entry for each opd function descriptor, |
1998 | | and some spares since opd entries may be either 16 or 24 bytes. */ |
1999 | 0 | #define OPD_NDX(OFF) ((OFF) >> 4) |
2000 | | struct _opd_sec_data |
2001 | | { |
2002 | | /* Points to the function code section for local opd entries. */ |
2003 | | asection **func_sec; |
2004 | | |
2005 | | /* After editing .opd, adjust references to opd local syms. */ |
2006 | | long *adjust; |
2007 | | |
2008 | | union |
2009 | | { |
2010 | | /* A copy of relocs before they are modified for --emit-relocs. */ |
2011 | | Elf_Internal_Rela *relocs; |
2012 | | |
2013 | | /* Section contents. */ |
2014 | | bfd_byte *contents; |
2015 | | } u; |
2016 | | } opd; |
2017 | | |
2018 | | /* An array for toc sections, indexed by offset/8. */ |
2019 | | struct _toc_sec_data |
2020 | | { |
2021 | | /* Specifies the relocation symbol index used at a given toc offset. */ |
2022 | | unsigned *symndx; |
2023 | | |
2024 | | /* And the relocation addend. */ |
2025 | | bfd_vma *add; |
2026 | | } toc; |
2027 | | |
2028 | | /* Stub debugging. */ |
2029 | | struct ppc_stub_hash_entry *last_ent; |
2030 | | } u; |
2031 | | |
2032 | | enum _ppc64_sec_type sec_type:2; |
2033 | | |
2034 | | /* Flag set when small branches are detected. Used to |
2035 | | select suitable defaults for the stub group size. */ |
2036 | | unsigned int has_14bit_branch:1; |
2037 | | |
2038 | | /* Flag set when PLTCALL relocs are detected. */ |
2039 | | unsigned int has_pltcall:1; |
2040 | | |
2041 | | /* Flag set when section has PLT/GOT/TOC relocations that can be |
2042 | | optimised. */ |
2043 | | unsigned int has_optrel:1; |
2044 | | }; |
2045 | | |
2046 | | #define ppc64_elf_section_data(sec) \ |
2047 | 0 | ((struct _ppc64_elf_section_data *) elf_section_data (sec)) |
2048 | | |
2049 | | static bool |
2050 | | ppc64_elf_new_section_hook (bfd *abfd, asection *sec) |
2051 | 27.9k | { |
2052 | 27.9k | struct _ppc64_elf_section_data *sdata; |
2053 | | |
2054 | 27.9k | sdata = bfd_zalloc (abfd, sizeof (*sdata)); |
2055 | 27.9k | if (sdata == NULL) |
2056 | 0 | return false; |
2057 | 27.9k | sec->used_by_bfd = sdata; |
2058 | | |
2059 | 27.9k | return _bfd_elf_new_section_hook (abfd, sec); |
2060 | 27.9k | } |
2061 | | |
2062 | | static bool |
2063 | | ppc64_elf_section_flags (const Elf_Internal_Shdr *hdr) |
2064 | 27.6k | { |
2065 | 27.6k | const char *name = hdr->bfd_section->name; |
2066 | | |
2067 | 27.6k | if (startswith (name, ".sbss") |
2068 | 27.6k | || startswith (name, ".sdata")) |
2069 | 1.03k | hdr->bfd_section->flags |= SEC_SMALL_DATA; |
2070 | | |
2071 | 27.6k | return true; |
2072 | 27.6k | } |
2073 | | |
2074 | | static struct _opd_sec_data * |
2075 | | get_opd_info (asection * sec) |
2076 | 0 | { |
2077 | 0 | if (sec != NULL |
2078 | 0 | && ppc64_elf_section_data (sec) != NULL |
2079 | 0 | && ppc64_elf_section_data (sec)->sec_type == sec_opd) |
2080 | 0 | return &ppc64_elf_section_data (sec)->u.opd; |
2081 | 0 | return NULL; |
2082 | 0 | } |
2083 | | |
2084 | | /* Parameters for the qsort hook. */ |
2085 | | static bool synthetic_relocatable; |
2086 | | static const asection *synthetic_opd; |
2087 | | |
2088 | | /* qsort comparison function for ppc64_elf_get_synthetic_symtab. */ |
2089 | | |
2090 | | static int |
2091 | | compare_symbols (const void *ap, const void *bp) |
2092 | 0 | { |
2093 | 0 | const asymbol *a = *(const asymbol **) ap; |
2094 | 0 | const asymbol *b = *(const asymbol **) bp; |
2095 | | |
2096 | | /* Section symbols first. */ |
2097 | 0 | if ((a->flags & BSF_SECTION_SYM) && !(b->flags & BSF_SECTION_SYM)) |
2098 | 0 | return -1; |
2099 | 0 | if (!(a->flags & BSF_SECTION_SYM) && (b->flags & BSF_SECTION_SYM)) |
2100 | 0 | return 1; |
2101 | | |
2102 | | /* then .opd symbols. */ |
2103 | 0 | if (synthetic_opd != NULL) |
2104 | 0 | { |
2105 | 0 | if (strcmp (a->section->name, ".opd") == 0 |
2106 | 0 | && strcmp (b->section->name, ".opd") != 0) |
2107 | 0 | return -1; |
2108 | 0 | if (strcmp (a->section->name, ".opd") != 0 |
2109 | 0 | && strcmp (b->section->name, ".opd") == 0) |
2110 | 0 | return 1; |
2111 | 0 | } |
2112 | | |
2113 | | /* then other code symbols. */ |
2114 | 0 | if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
2115 | 0 | == (SEC_CODE | SEC_ALLOC)) |
2116 | 0 | && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
2117 | 0 | != (SEC_CODE | SEC_ALLOC))) |
2118 | 0 | return -1; |
2119 | | |
2120 | 0 | if (((a->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
2121 | 0 | != (SEC_CODE | SEC_ALLOC)) |
2122 | 0 | && ((b->section->flags & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL)) |
2123 | 0 | == (SEC_CODE | SEC_ALLOC))) |
2124 | 0 | return 1; |
2125 | | |
2126 | 0 | if (synthetic_relocatable) |
2127 | 0 | { |
2128 | 0 | if (a->section->id < b->section->id) |
2129 | 0 | return -1; |
2130 | | |
2131 | 0 | if (a->section->id > b->section->id) |
2132 | 0 | return 1; |
2133 | 0 | } |
2134 | | |
2135 | 0 | if (a->value + a->section->vma < b->value + b->section->vma) |
2136 | 0 | return -1; |
2137 | | |
2138 | 0 | if (a->value + a->section->vma > b->value + b->section->vma) |
2139 | 0 | return 1; |
2140 | | |
2141 | | /* For syms with the same value, prefer strong dynamic global function |
2142 | | syms over other syms. */ |
2143 | 0 | if ((a->flags & BSF_GLOBAL) != 0 && (b->flags & BSF_GLOBAL) == 0) |
2144 | 0 | return -1; |
2145 | | |
2146 | 0 | if ((a->flags & BSF_GLOBAL) == 0 && (b->flags & BSF_GLOBAL) != 0) |
2147 | 0 | return 1; |
2148 | | |
2149 | 0 | if ((a->flags & BSF_FUNCTION) != 0 && (b->flags & BSF_FUNCTION) == 0) |
2150 | 0 | return -1; |
2151 | | |
2152 | 0 | if ((a->flags & BSF_FUNCTION) == 0 && (b->flags & BSF_FUNCTION) != 0) |
2153 | 0 | return 1; |
2154 | | |
2155 | 0 | if ((a->flags & BSF_WEAK) == 0 && (b->flags & BSF_WEAK) != 0) |
2156 | 0 | return -1; |
2157 | | |
2158 | 0 | if ((a->flags & BSF_WEAK) != 0 && (b->flags & BSF_WEAK) == 0) |
2159 | 0 | return 1; |
2160 | | |
2161 | 0 | if ((a->flags & BSF_DYNAMIC) != 0 && (b->flags & BSF_DYNAMIC) == 0) |
2162 | 0 | return -1; |
2163 | | |
2164 | 0 | if ((a->flags & BSF_DYNAMIC) == 0 && (b->flags & BSF_DYNAMIC) != 0) |
2165 | 0 | return 1; |
2166 | | |
2167 | | /* Finally, sort on where the symbol is in memory. The symbols will |
2168 | | be in at most two malloc'd blocks, one for static syms, one for |
2169 | | dynamic syms, and we distinguish the two blocks above by testing |
2170 | | BSF_DYNAMIC. Since we are sorting the symbol pointers which were |
2171 | | originally in the same order as the symbols (and we're not |
2172 | | sorting the symbols themselves), this ensures a stable sort. */ |
2173 | 0 | if (a < b) |
2174 | 0 | return -1; |
2175 | 0 | if (a > b) |
2176 | 0 | return 1; |
2177 | 0 | return 0; |
2178 | 0 | } |
2179 | | |
2180 | | /* Search SYMS for a symbol of the given VALUE. */ |
2181 | | |
2182 | | static asymbol * |
2183 | | sym_exists_at (asymbol **syms, size_t lo, size_t hi, unsigned int id, |
2184 | | bfd_vma value) |
2185 | 0 | { |
2186 | 0 | size_t mid; |
2187 | |
|
2188 | 0 | if (id == (unsigned) -1) |
2189 | 0 | { |
2190 | 0 | while (lo < hi) |
2191 | 0 | { |
2192 | 0 | mid = (lo + hi) >> 1; |
2193 | 0 | if (syms[mid]->value + syms[mid]->section->vma < value) |
2194 | 0 | lo = mid + 1; |
2195 | 0 | else if (syms[mid]->value + syms[mid]->section->vma > value) |
2196 | 0 | hi = mid; |
2197 | 0 | else |
2198 | 0 | return syms[mid]; |
2199 | 0 | } |
2200 | 0 | } |
2201 | 0 | else |
2202 | 0 | { |
2203 | 0 | while (lo < hi) |
2204 | 0 | { |
2205 | 0 | mid = (lo + hi) >> 1; |
2206 | 0 | if (syms[mid]->section->id < id) |
2207 | 0 | lo = mid + 1; |
2208 | 0 | else if (syms[mid]->section->id > id) |
2209 | 0 | hi = mid; |
2210 | 0 | else if (syms[mid]->value < value) |
2211 | 0 | lo = mid + 1; |
2212 | 0 | else if (syms[mid]->value > value) |
2213 | 0 | hi = mid; |
2214 | 0 | else |
2215 | 0 | return syms[mid]; |
2216 | 0 | } |
2217 | 0 | } |
2218 | 0 | return NULL; |
2219 | 0 | } |
2220 | | |
2221 | | static bool |
2222 | | section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr) |
2223 | 0 | { |
2224 | 0 | bfd_vma vma = *(bfd_vma *) ptr; |
2225 | 0 | return ((section->flags & SEC_ALLOC) != 0 |
2226 | 0 | && section->vma <= vma |
2227 | 0 | && vma < section->vma + section->size); |
2228 | 0 | } |
2229 | | |
2230 | | /* Create synthetic symbols, effectively restoring "dot-symbol" function |
2231 | | entry syms. Also generate @plt symbols for the glink branch table. |
2232 | | Returns count of synthetic symbols in RET or -1 on error. */ |
2233 | | |
2234 | | static long |
2235 | | ppc64_elf_get_synthetic_symtab (bfd *abfd, |
2236 | | long static_count, asymbol **static_syms, |
2237 | | long dyn_count, asymbol **dyn_syms, |
2238 | | asymbol **ret) |
2239 | 12 | { |
2240 | 12 | asymbol *s; |
2241 | 12 | size_t i, j, count; |
2242 | 12 | char *names; |
2243 | 12 | size_t symcount, codesecsym, codesecsymend, secsymend, opdsymend; |
2244 | 12 | asection *opd = NULL; |
2245 | 12 | bool relocatable = (abfd->flags & (EXEC_P | DYNAMIC)) == 0; |
2246 | 12 | asymbol **syms; |
2247 | 12 | int abi = abiversion (abfd); |
2248 | | |
2249 | 12 | *ret = NULL; |
2250 | | |
2251 | 12 | if (abi < 2) |
2252 | 11 | { |
2253 | 11 | opd = bfd_get_section_by_name (abfd, ".opd"); |
2254 | 11 | if (opd == NULL && abi == 1) |
2255 | 0 | return 0; |
2256 | 11 | } |
2257 | | |
2258 | 12 | syms = NULL; |
2259 | 12 | codesecsym = 0; |
2260 | 12 | codesecsymend = 0; |
2261 | 12 | secsymend = 0; |
2262 | 12 | opdsymend = 0; |
2263 | 12 | symcount = 0; |
2264 | 12 | if (opd != NULL) |
2265 | 0 | { |
2266 | 0 | symcount = static_count; |
2267 | 0 | if (!relocatable) |
2268 | 0 | symcount += dyn_count; |
2269 | 0 | if (symcount == 0) |
2270 | 0 | return 0; |
2271 | | |
2272 | 0 | syms = bfd_malloc ((symcount + 1) * sizeof (*syms)); |
2273 | 0 | if (syms == NULL) |
2274 | 0 | return -1; |
2275 | | |
2276 | 0 | if (!relocatable && static_count != 0 && dyn_count != 0) |
2277 | 0 | { |
2278 | | /* Use both symbol tables. */ |
2279 | 0 | memcpy (syms, static_syms, static_count * sizeof (*syms)); |
2280 | 0 | memcpy (syms + static_count, dyn_syms, |
2281 | 0 | (dyn_count + 1) * sizeof (*syms)); |
2282 | 0 | } |
2283 | 0 | else if (!relocatable && static_count == 0) |
2284 | 0 | memcpy (syms, dyn_syms, (symcount + 1) * sizeof (*syms)); |
2285 | 0 | else |
2286 | 0 | memcpy (syms, static_syms, (symcount + 1) * sizeof (*syms)); |
2287 | | |
2288 | | /* Trim uninteresting symbols. Interesting symbols are section, |
2289 | | function, and notype symbols. */ |
2290 | 0 | for (i = 0, j = 0; i < symcount; ++i) |
2291 | 0 | if ((syms[i]->flags & (BSF_FILE | BSF_OBJECT | BSF_THREAD_LOCAL |
2292 | 0 | | BSF_RELC | BSF_SRELC)) == 0) |
2293 | 0 | syms[j++] = syms[i]; |
2294 | 0 | symcount = j; |
2295 | |
|
2296 | 0 | synthetic_relocatable = relocatable; |
2297 | 0 | synthetic_opd = opd; |
2298 | 0 | qsort (syms, symcount, sizeof (*syms), compare_symbols); |
2299 | |
|
2300 | 0 | if (!relocatable && symcount > 1) |
2301 | 0 | { |
2302 | | /* Trim duplicate syms, since we may have merged the normal |
2303 | | and dynamic symbols. Actually, we only care about syms |
2304 | | that have different values, so trim any with the same |
2305 | | value. Don't consider ifunc and ifunc resolver symbols |
2306 | | duplicates however, because GDB wants to know whether a |
2307 | | text symbol is an ifunc resolver. */ |
2308 | 0 | for (i = 1, j = 1; i < symcount; ++i) |
2309 | 0 | { |
2310 | 0 | const asymbol *s0 = syms[i - 1]; |
2311 | 0 | const asymbol *s1 = syms[i]; |
2312 | |
|
2313 | 0 | if ((s0->value + s0->section->vma |
2314 | 0 | != s1->value + s1->section->vma) |
2315 | 0 | || ((s0->flags & BSF_GNU_INDIRECT_FUNCTION) |
2316 | 0 | != (s1->flags & BSF_GNU_INDIRECT_FUNCTION))) |
2317 | 0 | syms[j++] = syms[i]; |
2318 | 0 | } |
2319 | 0 | symcount = j; |
2320 | 0 | } |
2321 | |
|
2322 | 0 | i = 0; |
2323 | | /* Note that here and in compare_symbols we can't compare opd and |
2324 | | sym->section directly. With separate debug info files, the |
2325 | | symbols will be extracted from the debug file while abfd passed |
2326 | | to this function is the real binary. */ |
2327 | 0 | if ((syms[i]->flags & BSF_SECTION_SYM) != 0 |
2328 | 0 | && strcmp (syms[i]->section->name, ".opd") == 0) |
2329 | 0 | ++i; |
2330 | 0 | codesecsym = i; |
2331 | |
|
2332 | 0 | for (; i < symcount; ++i) |
2333 | 0 | if (((syms[i]->section->flags & (SEC_CODE | SEC_ALLOC |
2334 | 0 | | SEC_THREAD_LOCAL)) |
2335 | 0 | != (SEC_CODE | SEC_ALLOC)) |
2336 | 0 | || (syms[i]->flags & BSF_SECTION_SYM) == 0) |
2337 | 0 | break; |
2338 | 0 | codesecsymend = i; |
2339 | |
|
2340 | 0 | for (; i < symcount; ++i) |
2341 | 0 | if ((syms[i]->flags & BSF_SECTION_SYM) == 0) |
2342 | 0 | break; |
2343 | 0 | secsymend = i; |
2344 | |
|
2345 | 0 | for (; i < symcount; ++i) |
2346 | 0 | if (strcmp (syms[i]->section->name, ".opd") != 0) |
2347 | 0 | break; |
2348 | 0 | opdsymend = i; |
2349 | |
|
2350 | 0 | for (; i < symcount; ++i) |
2351 | 0 | if (((syms[i]->section->flags |
2352 | 0 | & (SEC_CODE | SEC_ALLOC | SEC_THREAD_LOCAL))) |
2353 | 0 | != (SEC_CODE | SEC_ALLOC)) |
2354 | 0 | break; |
2355 | 0 | symcount = i; |
2356 | 0 | } |
2357 | 12 | count = 0; |
2358 | | |
2359 | 12 | if (relocatable) |
2360 | 2 | { |
2361 | 2 | bool (*slurp_relocs) (bfd *, asection *, asymbol **, bool); |
2362 | 2 | arelent *r; |
2363 | 2 | size_t size; |
2364 | 2 | size_t relcount; |
2365 | | |
2366 | 2 | if (opdsymend == secsymend) |
2367 | 2 | goto done; |
2368 | | |
2369 | 0 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
2370 | 0 | relcount = (opd->flags & SEC_RELOC) ? opd->reloc_count : 0; |
2371 | 0 | if (relcount == 0) |
2372 | 0 | goto done; |
2373 | | |
2374 | 0 | if (!(*slurp_relocs) (abfd, opd, static_syms, false)) |
2375 | 0 | { |
2376 | 0 | count = -1; |
2377 | 0 | goto done; |
2378 | 0 | } |
2379 | | |
2380 | 0 | size = 0; |
2381 | 0 | for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
2382 | 0 | { |
2383 | 0 | asymbol *sym; |
2384 | |
|
2385 | 0 | while (r < opd->relocation + relcount |
2386 | 0 | && r->address < syms[i]->value + opd->vma) |
2387 | 0 | ++r; |
2388 | |
|
2389 | 0 | if (r == opd->relocation + relcount) |
2390 | 0 | break; |
2391 | | |
2392 | 0 | if (r->address != syms[i]->value + opd->vma) |
2393 | 0 | continue; |
2394 | | |
2395 | 0 | if (r->howto->type != R_PPC64_ADDR64) |
2396 | 0 | continue; |
2397 | | |
2398 | 0 | sym = *r->sym_ptr_ptr; |
2399 | 0 | if (!sym_exists_at (syms, opdsymend, symcount, |
2400 | 0 | sym->section->id, sym->value + r->addend)) |
2401 | 0 | { |
2402 | 0 | ++count; |
2403 | 0 | size += sizeof (asymbol); |
2404 | 0 | size += strlen (syms[i]->name) + 2; |
2405 | 0 | } |
2406 | 0 | } |
2407 | |
|
2408 | 0 | if (size == 0) |
2409 | 0 | goto done; |
2410 | 0 | s = *ret = bfd_malloc (size); |
2411 | 0 | if (s == NULL) |
2412 | 0 | { |
2413 | 0 | count = -1; |
2414 | 0 | goto done; |
2415 | 0 | } |
2416 | | |
2417 | 0 | names = (char *) (s + count); |
2418 | |
|
2419 | 0 | for (i = secsymend, r = opd->relocation; i < opdsymend; ++i) |
2420 | 0 | { |
2421 | 0 | asymbol *sym; |
2422 | |
|
2423 | 0 | while (r < opd->relocation + relcount |
2424 | 0 | && r->address < syms[i]->value + opd->vma) |
2425 | 0 | ++r; |
2426 | |
|
2427 | 0 | if (r == opd->relocation + relcount) |
2428 | 0 | break; |
2429 | | |
2430 | 0 | if (r->address != syms[i]->value + opd->vma) |
2431 | 0 | continue; |
2432 | | |
2433 | 0 | if (r->howto->type != R_PPC64_ADDR64) |
2434 | 0 | continue; |
2435 | | |
2436 | 0 | sym = *r->sym_ptr_ptr; |
2437 | 0 | if (!sym_exists_at (syms, opdsymend, symcount, |
2438 | 0 | sym->section->id, sym->value + r->addend)) |
2439 | 0 | { |
2440 | 0 | size_t len; |
2441 | |
|
2442 | 0 | *s = *syms[i]; |
2443 | 0 | s->flags |= BSF_SYNTHETIC; |
2444 | 0 | s->section = sym->section; |
2445 | 0 | s->value = sym->value + r->addend; |
2446 | 0 | s->name = names; |
2447 | 0 | *names++ = '.'; |
2448 | 0 | len = strlen (syms[i]->name); |
2449 | 0 | memcpy (names, syms[i]->name, len + 1); |
2450 | 0 | names += len + 1; |
2451 | | /* Have udata.p point back to the original symbol this |
2452 | | synthetic symbol was derived from. */ |
2453 | 0 | s->udata.p = syms[i]; |
2454 | 0 | s++; |
2455 | 0 | } |
2456 | 0 | } |
2457 | 0 | } |
2458 | 10 | else |
2459 | 10 | { |
2460 | 10 | bool (*slurp_relocs) (bfd *, asection *, asymbol **, bool); |
2461 | 10 | bfd_byte *contents = NULL; |
2462 | 10 | size_t size; |
2463 | 10 | size_t plt_count = 0; |
2464 | 10 | bfd_vma glink_vma = 0, resolv_vma = 0; |
2465 | 10 | asection *dynamic, *glink = NULL, *relplt = NULL; |
2466 | 10 | arelent *p; |
2467 | | |
2468 | 10 | if (opd != NULL |
2469 | 10 | && ((opd->flags & SEC_HAS_CONTENTS) == 0 |
2470 | 0 | || !bfd_malloc_and_get_section (abfd, opd, &contents))) |
2471 | 0 | { |
2472 | 0 | free_contents_and_exit_err: |
2473 | 0 | count = -1; |
2474 | 10 | free_contents_and_exit: |
2475 | 10 | free (contents); |
2476 | 10 | goto done; |
2477 | 0 | } |
2478 | | |
2479 | 10 | size = 0; |
2480 | 10 | for (i = secsymend; i < opdsymend; ++i) |
2481 | 0 | { |
2482 | 0 | bfd_vma ent; |
2483 | | |
2484 | | /* Ignore bogus symbols. */ |
2485 | 0 | if (syms[i]->value > opd->size - 8) |
2486 | 0 | continue; |
2487 | | |
2488 | 0 | ent = bfd_get_64 (abfd, contents + syms[i]->value); |
2489 | 0 | if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) |
2490 | 0 | { |
2491 | 0 | ++count; |
2492 | 0 | size += sizeof (asymbol); |
2493 | 0 | size += strlen (syms[i]->name) + 2; |
2494 | 0 | } |
2495 | 0 | } |
2496 | | |
2497 | | /* Get start of .glink stubs from DT_PPC64_GLINK. */ |
2498 | 10 | if (dyn_count != 0 |
2499 | 10 | && (dynamic = bfd_get_section_by_name (abfd, ".dynamic")) != NULL) |
2500 | 0 | { |
2501 | 0 | bfd_byte *dynbuf, *extdyn, *extdynend; |
2502 | 0 | size_t extdynsize; |
2503 | 0 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); |
2504 | |
|
2505 | 0 | if ((dynamic->flags & SEC_HAS_CONTENTS) == 0 |
2506 | 0 | || !bfd_malloc_and_get_section (abfd, dynamic, &dynbuf)) |
2507 | 0 | goto free_contents_and_exit_err; |
2508 | | |
2509 | 0 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
2510 | 0 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; |
2511 | |
|
2512 | 0 | for (extdyn = dynbuf, extdynend = dynbuf + dynamic->size; |
2513 | 0 | (size_t) (extdynend - extdyn) >= extdynsize; |
2514 | 0 | extdyn += extdynsize) |
2515 | 0 | { |
2516 | 0 | Elf_Internal_Dyn dyn; |
2517 | 0 | (*swap_dyn_in) (abfd, extdyn, &dyn); |
2518 | |
|
2519 | 0 | if (dyn.d_tag == DT_NULL) |
2520 | 0 | break; |
2521 | | |
2522 | 0 | if (dyn.d_tag == DT_PPC64_GLINK) |
2523 | 0 | { |
2524 | | /* The first glink stub starts at DT_PPC64_GLINK plus 32. |
2525 | | See comment in ppc64_elf_finish_dynamic_sections. */ |
2526 | 0 | glink_vma = dyn.d_un.d_val + 8 * 4; |
2527 | | /* The .glink section usually does not survive the final |
2528 | | link; search for the section (usually .text) where the |
2529 | | glink stubs now reside. */ |
2530 | 0 | glink = bfd_sections_find_if (abfd, section_covers_vma, |
2531 | 0 | &glink_vma); |
2532 | 0 | break; |
2533 | 0 | } |
2534 | 0 | } |
2535 | |
|
2536 | 0 | free (dynbuf); |
2537 | 0 | } |
2538 | | |
2539 | 10 | if (glink != NULL) |
2540 | 0 | { |
2541 | | /* Determine __glink trampoline by reading the relative branch |
2542 | | from the first glink stub. */ |
2543 | 0 | bfd_byte buf[4]; |
2544 | 0 | unsigned int off = 0; |
2545 | |
|
2546 | 0 | while (bfd_get_section_contents (abfd, glink, buf, |
2547 | 0 | glink_vma + off - glink->vma, 4)) |
2548 | 0 | { |
2549 | 0 | unsigned int insn = bfd_get_32 (abfd, buf); |
2550 | 0 | insn ^= B_DOT; |
2551 | 0 | if ((insn & ~0x3fffffc) == 0) |
2552 | 0 | { |
2553 | 0 | resolv_vma |
2554 | 0 | = glink_vma + off + (insn ^ 0x2000000) - 0x2000000; |
2555 | 0 | break; |
2556 | 0 | } |
2557 | 0 | off += 4; |
2558 | 0 | if (off > 4) |
2559 | 0 | break; |
2560 | 0 | } |
2561 | |
|
2562 | 0 | if (resolv_vma) |
2563 | 0 | size += sizeof (asymbol) + sizeof ("__glink_PLTresolve"); |
2564 | |
|
2565 | 0 | relplt = bfd_get_section_by_name (abfd, ".rela.plt"); |
2566 | 0 | if (relplt != NULL) |
2567 | 0 | { |
2568 | 0 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
2569 | 0 | if (!(*slurp_relocs) (abfd, relplt, dyn_syms, true)) |
2570 | 0 | goto free_contents_and_exit_err; |
2571 | | |
2572 | 0 | plt_count = NUM_SHDR_ENTRIES (&elf_section_data (relplt)->this_hdr); |
2573 | 0 | size += plt_count * sizeof (asymbol); |
2574 | |
|
2575 | 0 | p = relplt->relocation; |
2576 | 0 | for (i = 0; i < plt_count; i++, p++) |
2577 | 0 | { |
2578 | 0 | size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt"); |
2579 | 0 | if (p->addend != 0) |
2580 | 0 | size += sizeof ("+0x") - 1 + 16; |
2581 | 0 | } |
2582 | 0 | } |
2583 | 0 | } |
2584 | | |
2585 | 10 | if (size == 0) |
2586 | 10 | goto free_contents_and_exit; |
2587 | 0 | s = *ret = bfd_malloc (size); |
2588 | 0 | if (s == NULL) |
2589 | 0 | goto free_contents_and_exit_err; |
2590 | | |
2591 | 0 | names = (char *) (s + count + plt_count + (resolv_vma != 0)); |
2592 | |
|
2593 | 0 | for (i = secsymend; i < opdsymend; ++i) |
2594 | 0 | { |
2595 | 0 | bfd_vma ent; |
2596 | |
|
2597 | 0 | if (syms[i]->value > opd->size - 8) |
2598 | 0 | continue; |
2599 | | |
2600 | 0 | ent = bfd_get_64 (abfd, contents + syms[i]->value); |
2601 | 0 | if (!sym_exists_at (syms, opdsymend, symcount, -1, ent)) |
2602 | 0 | { |
2603 | 0 | size_t lo, hi; |
2604 | 0 | size_t len; |
2605 | 0 | asection *sec = abfd->sections; |
2606 | |
|
2607 | 0 | *s = *syms[i]; |
2608 | 0 | lo = codesecsym; |
2609 | 0 | hi = codesecsymend; |
2610 | 0 | while (lo < hi) |
2611 | 0 | { |
2612 | 0 | size_t mid = (lo + hi) >> 1; |
2613 | 0 | if (syms[mid]->section->vma < ent) |
2614 | 0 | lo = mid + 1; |
2615 | 0 | else if (syms[mid]->section->vma > ent) |
2616 | 0 | hi = mid; |
2617 | 0 | else |
2618 | 0 | { |
2619 | 0 | sec = syms[mid]->section; |
2620 | 0 | break; |
2621 | 0 | } |
2622 | 0 | } |
2623 | |
|
2624 | 0 | if (lo >= hi && lo > codesecsym) |
2625 | 0 | sec = syms[lo - 1]->section; |
2626 | |
|
2627 | 0 | for (; sec != NULL; sec = sec->next) |
2628 | 0 | { |
2629 | 0 | if (sec->vma > ent) |
2630 | 0 | break; |
2631 | | /* SEC_LOAD may not be set if SEC is from a separate debug |
2632 | | info file. */ |
2633 | 0 | if ((sec->flags & SEC_ALLOC) == 0) |
2634 | 0 | break; |
2635 | 0 | if ((sec->flags & SEC_CODE) != 0) |
2636 | 0 | s->section = sec; |
2637 | 0 | } |
2638 | 0 | s->flags |= BSF_SYNTHETIC; |
2639 | 0 | s->value = ent - s->section->vma; |
2640 | 0 | s->name = names; |
2641 | 0 | *names++ = '.'; |
2642 | 0 | len = strlen (syms[i]->name); |
2643 | 0 | memcpy (names, syms[i]->name, len + 1); |
2644 | 0 | names += len + 1; |
2645 | | /* Have udata.p point back to the original symbol this |
2646 | | synthetic symbol was derived from. */ |
2647 | 0 | s->udata.p = syms[i]; |
2648 | 0 | s++; |
2649 | 0 | } |
2650 | 0 | } |
2651 | 0 | free (contents); |
2652 | |
|
2653 | 0 | if (glink != NULL && relplt != NULL) |
2654 | 0 | { |
2655 | 0 | if (resolv_vma) |
2656 | 0 | { |
2657 | | /* Add a symbol for the main glink trampoline. */ |
2658 | 0 | memset (s, 0, sizeof *s); |
2659 | 0 | s->the_bfd = abfd; |
2660 | 0 | s->flags = BSF_GLOBAL | BSF_SYNTHETIC; |
2661 | 0 | s->section = glink; |
2662 | 0 | s->value = resolv_vma - glink->vma; |
2663 | 0 | s->name = names; |
2664 | 0 | memcpy (names, "__glink_PLTresolve", |
2665 | 0 | sizeof ("__glink_PLTresolve")); |
2666 | 0 | names += sizeof ("__glink_PLTresolve"); |
2667 | 0 | s++; |
2668 | 0 | count++; |
2669 | 0 | } |
2670 | | |
2671 | | /* FIXME: It would be very much nicer to put sym@plt on the |
2672 | | stub rather than on the glink branch table entry. The |
2673 | | objdump disassembler would then use a sensible symbol |
2674 | | name on plt calls. The difficulty in doing so is |
2675 | | a) finding the stubs, and, |
2676 | | b) matching stubs against plt entries, and, |
2677 | | c) there can be multiple stubs for a given plt entry. |
2678 | | |
2679 | | Solving (a) could be done by code scanning, but older |
2680 | | ppc64 binaries used different stubs to current code. |
2681 | | (b) is the tricky one since you need to known the toc |
2682 | | pointer for at least one function that uses a pic stub to |
2683 | | be able to calculate the plt address referenced. |
2684 | | (c) means gdb would need to set multiple breakpoints (or |
2685 | | find the glink branch itself) when setting breakpoints |
2686 | | for pending shared library loads. */ |
2687 | 0 | p = relplt->relocation; |
2688 | 0 | for (i = 0; i < plt_count; i++, p++) |
2689 | 0 | { |
2690 | 0 | size_t len; |
2691 | |
|
2692 | 0 | *s = **p->sym_ptr_ptr; |
2693 | | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since |
2694 | | we are defining a symbol, ensure one of them is set. */ |
2695 | 0 | if ((s->flags & BSF_LOCAL) == 0) |
2696 | 0 | s->flags |= BSF_GLOBAL; |
2697 | 0 | s->flags |= BSF_SYNTHETIC; |
2698 | 0 | s->section = glink; |
2699 | 0 | s->value = glink_vma - glink->vma; |
2700 | 0 | s->name = names; |
2701 | 0 | s->udata.p = NULL; |
2702 | 0 | len = strlen ((*p->sym_ptr_ptr)->name); |
2703 | 0 | memcpy (names, (*p->sym_ptr_ptr)->name, len); |
2704 | 0 | names += len; |
2705 | 0 | if (p->addend != 0) |
2706 | 0 | { |
2707 | 0 | memcpy (names, "+0x", sizeof ("+0x") - 1); |
2708 | 0 | names += sizeof ("+0x") - 1; |
2709 | 0 | bfd_sprintf_vma (abfd, names, p->addend); |
2710 | 0 | names += strlen (names); |
2711 | 0 | } |
2712 | 0 | memcpy (names, "@plt", sizeof ("@plt")); |
2713 | 0 | names += sizeof ("@plt"); |
2714 | 0 | s++; |
2715 | 0 | if (abi < 2) |
2716 | 0 | { |
2717 | 0 | glink_vma += 8; |
2718 | 0 | if (i >= 0x8000) |
2719 | 0 | glink_vma += 4; |
2720 | 0 | } |
2721 | 0 | else |
2722 | 0 | glink_vma += 4; |
2723 | 0 | } |
2724 | 0 | count += plt_count; |
2725 | 0 | } |
2726 | 0 | } |
2727 | | |
2728 | 12 | done: |
2729 | 12 | free (syms); |
2730 | 12 | return count; |
2731 | 12 | } |
2732 | | |
2733 | | /* The following functions are specific to the ELF linker, while |
2734 | | functions above are used generally. Those named ppc64_elf_* are |
2735 | | called by the main ELF linker code. They appear in this file more |
2736 | | or less in the order in which they are called. eg. |
2737 | | ppc64_elf_check_relocs is called early in the link process, |
2738 | | ppc64_elf_finish_dynamic_sections is one of the last functions |
2739 | | called. |
2740 | | |
2741 | | PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that |
2742 | | functions have both a function code symbol and a function descriptor |
2743 | | symbol. A call to foo in a relocatable object file looks like: |
2744 | | |
2745 | | . .text |
2746 | | . x: |
2747 | | . bl .foo |
2748 | | . nop |
2749 | | |
2750 | | The function definition in another object file might be: |
2751 | | |
2752 | | . .section .opd |
2753 | | . foo: .quad .foo |
2754 | | . .quad .TOC.@tocbase |
2755 | | . .quad 0 |
2756 | | . |
2757 | | . .text |
2758 | | . .foo: blr |
2759 | | |
2760 | | When the linker resolves the call during a static link, the branch |
2761 | | unsurprisingly just goes to .foo and the .opd information is unused. |
2762 | | If the function definition is in a shared library, things are a little |
2763 | | different: The call goes via a plt call stub, the opd information gets |
2764 | | copied to the plt, and the linker patches the nop. |
2765 | | |
2766 | | . x: |
2767 | | . bl .foo_stub |
2768 | | . ld 2,40(1) |
2769 | | . |
2770 | | . |
2771 | | . .foo_stub: |
2772 | | . std 2,40(1) # in practice, the call stub |
2773 | | . addis 11,2,Lfoo@toc@ha # is slightly optimized, but |
2774 | | . addi 11,11,Lfoo@toc@l # this is the general idea |
2775 | | . ld 12,0(11) |
2776 | | . ld 2,8(11) |
2777 | | . mtctr 12 |
2778 | | . ld 11,16(11) |
2779 | | . bctr |
2780 | | . |
2781 | | . .section .plt |
2782 | | . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) |
2783 | | |
2784 | | The "reloc ()" notation is supposed to indicate that the linker emits |
2785 | | an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd |
2786 | | copying. |
2787 | | |
2788 | | What are the difficulties here? Well, firstly, the relocations |
2789 | | examined by the linker in check_relocs are against the function code |
2790 | | sym .foo, while the dynamic relocation in the plt is emitted against |
2791 | | the function descriptor symbol, foo. Somewhere along the line, we need |
2792 | | to carefully copy dynamic link information from one symbol to the other. |
2793 | | Secondly, the generic part of the elf linker will make .foo a dynamic |
2794 | | symbol as is normal for most other backends. We need foo dynamic |
2795 | | instead, at least for an application final link. However, when |
2796 | | creating a shared library containing foo, we need to have both symbols |
2797 | | dynamic so that references to .foo are satisfied during the early |
2798 | | stages of linking. Otherwise the linker might decide to pull in a |
2799 | | definition from some other object, eg. a static library. |
2800 | | |
2801 | | Update: As of August 2004, we support a new convention. Function |
2802 | | calls may use the function descriptor symbol, ie. "bl foo". This |
2803 | | behaves exactly as "bl .foo". */ |
2804 | | |
2805 | | /* Of those relocs that might be copied as dynamic relocs, this |
2806 | | function selects those that must be copied when linking a shared |
2807 | | library or PIE, even when the symbol is local. */ |
2808 | | |
2809 | | static int |
2810 | | must_be_dyn_reloc (struct bfd_link_info *info, |
2811 | | enum elf_ppc64_reloc_type r_type) |
2812 | 0 | { |
2813 | 0 | switch (r_type) |
2814 | 0 | { |
2815 | 0 | default: |
2816 | | /* Only relative relocs can be resolved when the object load |
2817 | | address isn't fixed. DTPREL64 is excluded because the |
2818 | | dynamic linker needs to differentiate global dynamic from |
2819 | | local dynamic __tls_index pairs when PPC64_OPT_TLS is set. */ |
2820 | 0 | return 1; |
2821 | | |
2822 | 0 | case R_PPC64_REL32: |
2823 | 0 | case R_PPC64_REL64: |
2824 | 0 | case R_PPC64_REL30: |
2825 | 0 | case R_PPC64_TOC16: |
2826 | 0 | case R_PPC64_TOC16_DS: |
2827 | 0 | case R_PPC64_TOC16_LO: |
2828 | 0 | case R_PPC64_TOC16_HI: |
2829 | 0 | case R_PPC64_TOC16_HA: |
2830 | 0 | case R_PPC64_TOC16_LO_DS: |
2831 | 0 | return 0; |
2832 | | |
2833 | 0 | case R_PPC64_TPREL16: |
2834 | 0 | case R_PPC64_TPREL16_LO: |
2835 | 0 | case R_PPC64_TPREL16_HI: |
2836 | 0 | case R_PPC64_TPREL16_HA: |
2837 | 0 | case R_PPC64_TPREL16_DS: |
2838 | 0 | case R_PPC64_TPREL16_LO_DS: |
2839 | 0 | case R_PPC64_TPREL16_HIGH: |
2840 | 0 | case R_PPC64_TPREL16_HIGHA: |
2841 | 0 | case R_PPC64_TPREL16_HIGHER: |
2842 | 0 | case R_PPC64_TPREL16_HIGHERA: |
2843 | 0 | case R_PPC64_TPREL16_HIGHEST: |
2844 | 0 | case R_PPC64_TPREL16_HIGHESTA: |
2845 | 0 | case R_PPC64_TPREL64: |
2846 | 0 | case R_PPC64_TPREL34: |
2847 | | /* These relocations are relative but in a shared library the |
2848 | | linker doesn't know the thread pointer base. */ |
2849 | 0 | return bfd_link_dll (info); |
2850 | 0 | } |
2851 | 0 | } |
2852 | | |
2853 | | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
2854 | | copying dynamic variables from a shared lib into an app's .dynbss |
2855 | | section, and instead use a dynamic relocation to point into the |
2856 | | shared lib. With code that gcc generates it is vital that this be |
2857 | | enabled; In the PowerPC64 ELFv1 ABI the address of a function is |
2858 | | actually the address of a function descriptor which resides in the |
2859 | | .opd section. gcc uses the descriptor directly rather than going |
2860 | | via the GOT as some other ABIs do, which means that initialized |
2861 | | function pointers reference the descriptor. Thus, a function |
2862 | | pointer initialized to the address of a function in a shared |
2863 | | library will either require a .dynbss copy and a copy reloc, or a |
2864 | | dynamic reloc. Using a .dynbss copy redefines the function |
2865 | | descriptor symbol to point to the copy. This presents a problem as |
2866 | | a PLT entry for that function is also initialized from the function |
2867 | | descriptor symbol and the copy may not be initialized first. */ |
2868 | 0 | #define ELIMINATE_COPY_RELOCS 1 |
2869 | | |
2870 | | /* Section name for stubs is the associated section name plus this |
2871 | | string. */ |
2872 | 0 | #define STUB_SUFFIX ".stub" |
2873 | | |
2874 | | /* Linker stubs. |
2875 | | ppc_stub_long_branch: |
2876 | | Used when a 14 bit branch (or even a 24 bit branch) can't reach its |
2877 | | destination, but a 24 bit branch in a stub section will reach. |
2878 | | . b dest |
2879 | | |
2880 | | ppc_stub_plt_branch: |
2881 | | Similar to the above, but a 24 bit branch in the stub section won't |
2882 | | reach its destination. |
2883 | | . addis %r12,%r2,xxx@toc@ha |
2884 | | . ld %r12,xxx@toc@l(%r12) |
2885 | | . mtctr %r12 |
2886 | | . bctr |
2887 | | |
2888 | | ppc_stub_plt_call: |
2889 | | Used to call a function in a shared library. If it so happens that |
2890 | | the plt entry referenced crosses a 64k boundary, then an extra |
2891 | | "addi %r11,%r11,xxx@toc@l" will be inserted before the "mtctr". |
2892 | | An r2save variant starts with "std %r2,40(%r1)". |
2893 | | . addis %r11,%r2,xxx@toc@ha |
2894 | | . ld %r12,xxx+0@toc@l(%r11) |
2895 | | . mtctr %r12 |
2896 | | . ld %r2,xxx+8@toc@l(%r11) |
2897 | | . ld %r11,xxx+16@toc@l(%r11) |
2898 | | . bctr |
2899 | | |
2900 | | ppc_stub_long_branch and ppc_stub_plt_branch may also have additional |
2901 | | code to adjust the value and save r2 to support multiple toc sections. |
2902 | | A ppc_stub_long_branch with an r2 offset looks like: |
2903 | | . std %r2,40(%r1) |
2904 | | . addis %r2,%r2,off@ha |
2905 | | . addi %r2,%r2,off@l |
2906 | | . b dest |
2907 | | |
2908 | | A ppc_stub_plt_branch with an r2 offset looks like: |
2909 | | . std %r2,40(%r1) |
2910 | | . addis %r12,%r2,xxx@toc@ha |
2911 | | . ld %r12,xxx@toc@l(%r12) |
2912 | | . addis %r2,%r2,off@ha |
2913 | | . addi %r2,%r2,off@l |
2914 | | . mtctr %r12 |
2915 | | . bctr |
2916 | | |
2917 | | All of the above stubs are shown as their ELFv1 variants. ELFv2 |
2918 | | variants exist too, simpler for plt calls since a new toc pointer |
2919 | | and static chain are not loaded by the stub. In addition, ELFv2 |
2920 | | has some more complex stubs to handle calls marked with NOTOC |
2921 | | relocs from functions where r2 is not a valid toc pointer. |
2922 | | ppc_stub_long_branch_p9notoc: |
2923 | | . mflr %r12 |
2924 | | . bcl 20,31,1f |
2925 | | . 1: |
2926 | | . mflr %r11 |
2927 | | . mtlr %r12 |
2928 | | . addis %r12,%r11,dest-1b@ha |
2929 | | . addi %r12,%r12,dest-1b@l |
2930 | | . b dest |
2931 | | |
2932 | | ppc_stub_plt_branch_p9notoc: |
2933 | | . mflr %r12 |
2934 | | . bcl 20,31,1f |
2935 | | . 1: |
2936 | | . mflr %r11 |
2937 | | . mtlr %r12 |
2938 | | . lis %r12,xxx-1b@highest |
2939 | | . ori %r12,%r12,xxx-1b@higher |
2940 | | . sldi %r12,%r12,32 |
2941 | | . oris %r12,%r12,xxx-1b@high |
2942 | | . ori %r12,%r12,xxx-1b@l |
2943 | | . add %r12,%r11,%r12 |
2944 | | . mtctr %r12 |
2945 | | . bctr |
2946 | | |
2947 | | ppc_stub_plt_call_p9notoc: |
2948 | | . mflr %r12 |
2949 | | . bcl 20,31,1f |
2950 | | . 1: |
2951 | | . mflr %r11 |
2952 | | . mtlr %r12 |
2953 | | . lis %r12,xxx-1b@highest |
2954 | | . ori %r12,%r12,xxx-1b@higher |
2955 | | . sldi %r12,%r12,32 |
2956 | | . oris %r12,%r12,xxx-1b@high |
2957 | | . ori %r12,%r12,xxx-1b@l |
2958 | | . ldx %r12,%r11,%r12 |
2959 | | . mtctr %r12 |
2960 | | . bctr |
2961 | | |
2962 | | There are also ELFv1 power10 variants of these stubs. |
2963 | | ppc_stub_long_branch_notoc: |
2964 | | . pla %r12,dest@pcrel |
2965 | | . b dest |
2966 | | ppc_stub_plt_branch_notoc: |
2967 | | . lis %r11,(dest-1f)@highesta34 |
2968 | | . ori %r11,%r11,(dest-1f)@highera34 |
2969 | | . sldi %r11,%r11,34 |
2970 | | . 1: pla %r12,dest@pcrel |
2971 | | . add %r12,%r11,%r12 |
2972 | | . mtctr %r12 |
2973 | | . bctr |
2974 | | ppc_stub_plt_call_notoc: |
2975 | | . lis %r11,(xxx-1f)@highesta34 |
2976 | | . ori %r11,%r11,(xxx-1f)@highera34 |
2977 | | . sldi %r11,%r11,34 |
2978 | | . 1: pla %r12,xxx@pcrel |
2979 | | . ldx %r12,%r11,%r12 |
2980 | | . mtctr %r12 |
2981 | | . bctr |
2982 | | |
2983 | | In cases where the high instructions would add zero, they are |
2984 | | omitted and following instructions modified in some cases. |
2985 | | For example, a power10 ppc_stub_plt_call_notoc might simplify down |
2986 | | to |
2987 | | . pld %r12,xxx@pcrel |
2988 | | . mtctr %r12 |
2989 | | . bctr |
2990 | | |
2991 | | Stub variants may be merged. For example, if printf is called from |
2992 | | code with the tocsave optimization (ie. r2 saved in function |
2993 | | prologue) and therefore calls use a ppc_stub_plt_call linkage stub, |
2994 | | and from other code without the tocsave optimization requiring a |
2995 | | ppc_stub_plt_call_r2save linkage stub, a single stub of the latter |
2996 | | type will be created. Calls with the tocsave optimization will |
2997 | | enter this stub after the instruction saving r2. A similar |
2998 | | situation exists when calls are marked with R_PPC64_REL24_NOTOC |
2999 | | relocations. These require a ppc_stub_plt_call_notoc linkage stub |
3000 | | to call an external function like printf. If other calls to printf |
3001 | | require a ppc_stub_plt_call linkage stub then a single |
3002 | | ppc_stub_plt_call_notoc linkage stub may be used for both types of |
3003 | | call. */ |
3004 | | |
3005 | | enum ppc_stub_main_type |
3006 | | { |
3007 | | ppc_stub_none, |
3008 | | ppc_stub_long_branch, |
3009 | | ppc_stub_plt_branch, |
3010 | | ppc_stub_plt_call, |
3011 | | ppc_stub_global_entry, |
3012 | | ppc_stub_save_res |
3013 | | }; |
3014 | | |
3015 | | /* ppc_stub_long_branch, ppc_stub_plt_branch and ppc_stub_plt_call have |
3016 | | these variations. */ |
3017 | | |
3018 | | enum ppc_stub_sub_type |
3019 | | { |
3020 | | ppc_stub_toc, |
3021 | | ppc_stub_notoc, |
3022 | | ppc_stub_p9notoc |
3023 | | }; |
3024 | | |
3025 | | struct ppc_stub_type |
3026 | | { |
3027 | | ENUM_BITFIELD (ppc_stub_main_type) main : 3; |
3028 | | ENUM_BITFIELD (ppc_stub_sub_type) sub : 2; |
3029 | | unsigned int r2save : 1; |
3030 | | }; |
3031 | | |
3032 | | /* Information on stub grouping. */ |
3033 | | struct map_stub |
3034 | | { |
3035 | | /* The stub section. */ |
3036 | | asection *stub_sec; |
3037 | | /* This is the section to which stubs in the group will be attached. */ |
3038 | | asection *link_sec; |
3039 | | /* Next group. */ |
3040 | | struct map_stub *next; |
3041 | | /* Whether to emit a copy of register save/restore functions in this |
3042 | | group. */ |
3043 | | int needs_save_res; |
3044 | | /* Current offset within stubs after the insn restoring lr in a |
3045 | | _notoc or _both stub using bcl for pc-relative addressing, or |
3046 | | after the insn restoring lr in a __tls_get_addr_opt plt stub. */ |
3047 | | unsigned int lr_restore; |
3048 | | /* Accumulated size of EH info emitted to describe return address |
3049 | | if stubs modify lr. Does not include 17 byte FDE header. */ |
3050 | | unsigned int eh_size; |
3051 | | /* Offset in glink_eh_frame to the start of EH info for this group. */ |
3052 | | unsigned int eh_base; |
3053 | | }; |
3054 | | |
3055 | | struct ppc_stub_hash_entry |
3056 | | { |
3057 | | /* Base hash table entry structure. */ |
3058 | | struct bfd_hash_entry root; |
3059 | | |
3060 | | struct ppc_stub_type type; |
3061 | | |
3062 | | /* Group information. */ |
3063 | | struct map_stub *group; |
3064 | | |
3065 | | /* Offset within stub_sec of the beginning of this stub. */ |
3066 | | bfd_vma stub_offset; |
3067 | | |
3068 | | /* Given the symbol's value and its section we can determine its final |
3069 | | value when building the stubs (so the stub knows where to jump. */ |
3070 | | bfd_vma target_value; |
3071 | | asection *target_section; |
3072 | | |
3073 | | /* The symbol table entry, if any, that this was derived from. */ |
3074 | | struct ppc_link_hash_entry *h; |
3075 | | struct plt_entry *plt_ent; |
3076 | | |
3077 | | /* Symbol type. */ |
3078 | | unsigned char symtype; |
3079 | | |
3080 | | /* Symbol st_other. */ |
3081 | | unsigned char other; |
3082 | | |
3083 | | /* Debug: Track hash table traversal. */ |
3084 | | unsigned int id; |
3085 | | }; |
3086 | | |
3087 | | struct ppc_branch_hash_entry |
3088 | | { |
3089 | | /* Base hash table entry structure. */ |
3090 | | struct bfd_hash_entry root; |
3091 | | |
3092 | | /* Offset within branch lookup table. */ |
3093 | | unsigned int offset; |
3094 | | |
3095 | | /* Generation marker. */ |
3096 | | unsigned int iter; |
3097 | | }; |
3098 | | |
3099 | | /* Used to track dynamic relocations. */ |
3100 | | struct ppc_dyn_relocs |
3101 | | { |
3102 | | struct ppc_dyn_relocs *next; |
3103 | | |
3104 | | /* The input section of the reloc. */ |
3105 | | asection *sec; |
3106 | | |
3107 | | /* Total number of relocs copied for the input section. */ |
3108 | | unsigned int count; |
3109 | | |
3110 | | /* Number of pc-relative relocs copied for the input section. */ |
3111 | | unsigned int pc_count; |
3112 | | |
3113 | | /* Number of relocs that might become R_PPC64_RELATIVE. */ |
3114 | | unsigned int rel_count; |
3115 | | }; |
3116 | | |
3117 | | struct ppc_local_dyn_relocs |
3118 | | { |
3119 | | struct ppc_local_dyn_relocs *next; |
3120 | | |
3121 | | /* The input section of the reloc. */ |
3122 | | asection *sec; |
3123 | | |
3124 | | /* Total number of relocs copied for the input section. */ |
3125 | | unsigned int count; |
3126 | | |
3127 | | /* Number of relocs that might become R_PPC64_RELATIVE. */ |
3128 | | unsigned int rel_count : 31; |
3129 | | |
3130 | | /* Whether this entry is for STT_GNU_IFUNC symbols. */ |
3131 | | unsigned int ifunc : 1; |
3132 | | }; |
3133 | | |
3134 | | struct ppc_link_hash_entry |
3135 | | { |
3136 | | struct elf_link_hash_entry elf; |
3137 | | |
3138 | | union |
3139 | | { |
3140 | | /* A pointer to the most recently used stub hash entry against this |
3141 | | symbol. */ |
3142 | | struct ppc_stub_hash_entry *stub_cache; |
3143 | | |
3144 | | /* A pointer to the next symbol starting with a '.' */ |
3145 | | struct ppc_link_hash_entry *next_dot_sym; |
3146 | | } u; |
3147 | | |
3148 | | /* Link between function code and descriptor symbols. */ |
3149 | | struct ppc_link_hash_entry *oh; |
3150 | | |
3151 | | /* Flag function code and descriptor symbols. */ |
3152 | | unsigned int is_func:1; |
3153 | | unsigned int is_func_descriptor:1; |
3154 | | unsigned int fake:1; |
3155 | | |
3156 | | /* Whether global opd/toc sym has been adjusted or not. |
3157 | | After ppc64_elf_edit_opd/ppc64_elf_edit_toc has run, this flag |
3158 | | should be set for all globals defined in any opd/toc section. */ |
3159 | | unsigned int adjust_done:1; |
3160 | | |
3161 | | /* Set if this is an out-of-line register save/restore function, |
3162 | | with non-standard calling convention. */ |
3163 | | unsigned int save_res:1; |
3164 | | |
3165 | | /* Set if a duplicate symbol with non-zero localentry is detected, |
3166 | | even when the duplicate symbol does not provide a definition. */ |
3167 | | unsigned int non_zero_localentry:1; |
3168 | | |
3169 | | /* Contexts in which symbol is used in the GOT (or TOC). |
3170 | | Bits are or'd into the mask as the corresponding relocs are |
3171 | | encountered during check_relocs, with TLS_TLS being set when any |
3172 | | of the other TLS bits are set. tls_optimize clears bits when |
3173 | | optimizing to indicate the corresponding GOT entry type is not |
3174 | | needed. If set, TLS_TLS is never cleared. tls_optimize may also |
3175 | | set TLS_GDIE when a GD reloc turns into an IE one. |
3176 | | These flags are also kept for local symbols. */ |
3177 | 0 | #define TLS_TLS 1 /* Any TLS reloc. */ |
3178 | 0 | #define TLS_GD 2 /* GD reloc. */ |
3179 | 0 | #define TLS_LD 4 /* LD reloc. */ |
3180 | 0 | #define TLS_TPREL 8 /* TPREL reloc, => IE. */ |
3181 | 0 | #define TLS_DTPREL 16 /* DTPREL reloc, => LD. */ |
3182 | 0 | #define TLS_MARK 32 /* __tls_get_addr call marked. */ |
3183 | 0 | #define TLS_GDIE 64 /* GOT TPREL reloc resulting from GD->IE. */ |
3184 | 0 | #define TLS_EXPLICIT 256 /* TOC section TLS reloc, not stored. */ |
3185 | | unsigned char tls_mask; |
3186 | | |
3187 | | /* The above field is also used to mark function symbols. In which |
3188 | | case TLS_TLS will be 0. */ |
3189 | 0 | #define PLT_IFUNC 2 /* STT_GNU_IFUNC. */ |
3190 | 0 | #define PLT_KEEP 4 /* inline plt call requires plt entry. */ |
3191 | 0 | #define NON_GOT 256 /* local symbol plt, not stored. */ |
3192 | | }; |
3193 | | |
3194 | | static inline struct ppc_link_hash_entry * |
3195 | | ppc_elf_hash_entry (struct elf_link_hash_entry *ent) |
3196 | 0 | { |
3197 | 0 | return (struct ppc_link_hash_entry *) ent; |
3198 | 0 | } |
3199 | | |
3200 | | static inline struct elf_link_hash_entry * |
3201 | | elf_hash_entry (struct ppc_link_hash_entry *ent) |
3202 | 0 | { |
3203 | 0 | return (struct elf_link_hash_entry *) ent; |
3204 | 0 | } |
3205 | | |
3206 | | /* ppc64 ELF linker hash table. */ |
3207 | | |
3208 | | struct ppc_link_hash_table |
3209 | | { |
3210 | | struct elf_link_hash_table elf; |
3211 | | |
3212 | | /* The stub hash table. */ |
3213 | | struct bfd_hash_table stub_hash_table; |
3214 | | |
3215 | | /* Another hash table for plt_branch stubs. */ |
3216 | | struct bfd_hash_table branch_hash_table; |
3217 | | |
3218 | | /* Hash table for function prologue tocsave. */ |
3219 | | htab_t tocsave_htab; |
3220 | | |
3221 | | /* Various options and other info passed from the linker. */ |
3222 | | struct ppc64_elf_params *params; |
3223 | | |
3224 | | /* The size of sec_info below. */ |
3225 | | unsigned int sec_info_arr_size; |
3226 | | |
3227 | | /* Per-section array of extra section info. Done this way rather |
3228 | | than as part of ppc64_elf_section_data so we have the info for |
3229 | | non-ppc64 sections. */ |
3230 | | struct |
3231 | | { |
3232 | | /* Along with elf_gp, specifies the TOC pointer used by this section. */ |
3233 | | bfd_vma toc_off; |
3234 | | |
3235 | | union |
3236 | | { |
3237 | | /* The section group that this section belongs to. */ |
3238 | | struct map_stub *group; |
3239 | | /* A temp section list pointer. */ |
3240 | | asection *list; |
3241 | | } u; |
3242 | | } *sec_info; |
3243 | | |
3244 | | /* Linked list of groups. */ |
3245 | | struct map_stub *group; |
3246 | | |
3247 | | /* Temp used when calculating TOC pointers. */ |
3248 | | bfd_vma toc_curr; |
3249 | | bfd *toc_bfd; |
3250 | | asection *toc_first_sec; |
3251 | | |
3252 | | /* Used when adding symbols. */ |
3253 | | struct ppc_link_hash_entry *dot_syms; |
3254 | | |
3255 | | /* Shortcuts to get to dynamic linker sections. */ |
3256 | | asection *glink; |
3257 | | asection *global_entry; |
3258 | | asection *sfpr; |
3259 | | asection *pltlocal; |
3260 | | asection *relpltlocal; |
3261 | | asection *brlt; |
3262 | | asection *relbrlt; |
3263 | | asection *glink_eh_frame; |
3264 | | |
3265 | | /* Shortcut to .__tls_get_addr and __tls_get_addr. */ |
3266 | | struct ppc_link_hash_entry *tls_get_addr; |
3267 | | struct ppc_link_hash_entry *tls_get_addr_fd; |
3268 | | struct ppc_link_hash_entry *tga_desc; |
3269 | | struct ppc_link_hash_entry *tga_desc_fd; |
3270 | | struct map_stub *tga_group; |
3271 | | |
3272 | | /* The size of reliplt used by got entry relocs. */ |
3273 | | bfd_size_type got_reli_size; |
3274 | | |
3275 | | /* DT_RELR array of section/r_offset. */ |
3276 | | size_t relr_alloc; |
3277 | | size_t relr_count; |
3278 | | struct |
3279 | | { |
3280 | | asection *sec; |
3281 | | bfd_vma off; |
3282 | | } *relr; |
3283 | | |
3284 | | /* Statistics. */ |
3285 | | unsigned long stub_count[ppc_stub_save_res]; |
3286 | | |
3287 | | /* Number of stubs against global syms. */ |
3288 | | unsigned long stub_globals; |
3289 | | |
3290 | | /* Set if we're linking code with function descriptors. */ |
3291 | | unsigned int opd_abi:1; |
3292 | | |
3293 | | /* Support for multiple toc sections. */ |
3294 | | unsigned int do_multi_toc:1; |
3295 | | unsigned int multi_toc_needed:1; |
3296 | | unsigned int second_toc_pass:1; |
3297 | | unsigned int do_toc_opt:1; |
3298 | | |
3299 | | /* Set if tls optimization is enabled. */ |
3300 | | unsigned int do_tls_opt:1; |
3301 | | |
3302 | | /* Set if inline plt calls should be converted to direct calls. */ |
3303 | | unsigned int can_convert_all_inline_plt:1; |
3304 | | |
3305 | | /* Set if a stub_offset changed. */ |
3306 | | unsigned int stub_changed:1; |
3307 | | |
3308 | | /* Set on error. */ |
3309 | | unsigned int stub_error:1; |
3310 | | |
3311 | | /* Whether func_desc_adjust needs to be run over symbols. */ |
3312 | | unsigned int need_func_desc_adj:1; |
3313 | | |
3314 | | /* Whether plt calls for ELFv2 localentry:0 funcs have been optimized. */ |
3315 | | unsigned int has_plt_localentry0:1; |
3316 | | |
3317 | | /* Whether calls are made via the PLT from NOTOC functions. */ |
3318 | | unsigned int notoc_plt:1; |
3319 | | |
3320 | | /* Whether any code linked seems to be Power10. */ |
3321 | | unsigned int has_power10_relocs:1; |
3322 | | |
3323 | | /* Incremented once for each stub sized. */ |
3324 | | unsigned int stub_id; |
3325 | | |
3326 | | /* Incremented every time we size stubs. */ |
3327 | | unsigned int stub_iteration; |
3328 | | |
3329 | | /* After 20 iterations of stub sizing we no longer allow stubs to |
3330 | | shrink. This is to break out of a pathological case where adding |
3331 | | stubs or increasing their size on one iteration decreases section |
3332 | | gaps (perhaps due to alignment), which then results in smaller |
3333 | | stubs on the next iteration. */ |
3334 | 0 | #define STUB_SHRINK_ITER 20 |
3335 | | }; |
3336 | | |
3337 | | /* Rename some of the generic section flags to better document how they |
3338 | | are used here. */ |
3339 | | |
3340 | | /* Nonzero if this section has TLS related relocations. */ |
3341 | 0 | #define has_tls_reloc sec_flg0 |
3342 | | |
3343 | | /* Nonzero if this section has a call to __tls_get_addr lacking marker |
3344 | | relocations. */ |
3345 | 0 | #define nomark_tls_get_addr sec_flg1 |
3346 | | |
3347 | | /* Nonzero if this section has any toc or got relocs. */ |
3348 | 0 | #define has_toc_reloc sec_flg2 |
3349 | | |
3350 | | /* Nonzero if this section has a call to another section that uses |
3351 | | the toc or got. */ |
3352 | 0 | #define makes_toc_func_call sec_flg3 |
3353 | | |
3354 | | /* Recursion protection when determining above flag. */ |
3355 | 0 | #define call_check_in_progress sec_flg4 |
3356 | 0 | #define call_check_done sec_flg5 |
3357 | | |
3358 | | /* Get the ppc64 ELF linker hash table from a link_info structure. */ |
3359 | | |
3360 | | #define ppc_hash_table(p) \ |
3361 | 0 | ((is_elf_hash_table ((p)->hash) \ |
3362 | 0 | && elf_hash_table_id (elf_hash_table (p)) == PPC64_ELF_DATA) \ |
3363 | 0 | ? (struct ppc_link_hash_table *) (p)->hash : NULL) |
3364 | | |
3365 | | #define ppc_stub_hash_lookup(table, string, create, copy) \ |
3366 | 0 | ((struct ppc_stub_hash_entry *) \ |
3367 | 0 | bfd_hash_lookup ((table), (string), (create), (copy))) |
3368 | | |
3369 | | #define ppc_branch_hash_lookup(table, string, create, copy) \ |
3370 | 0 | ((struct ppc_branch_hash_entry *) \ |
3371 | 0 | bfd_hash_lookup ((table), (string), (create), (copy))) |
3372 | | |
3373 | | /* Create an entry in the stub hash table. */ |
3374 | | |
3375 | | static struct bfd_hash_entry * |
3376 | | stub_hash_newfunc (struct bfd_hash_entry *entry, |
3377 | | struct bfd_hash_table *table, |
3378 | | const char *string) |
3379 | 0 | { |
3380 | | /* Allocate the structure if it has not already been allocated by a |
3381 | | subclass. */ |
3382 | 0 | if (entry == NULL) |
3383 | 0 | { |
3384 | 0 | entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); |
3385 | 0 | if (entry == NULL) |
3386 | 0 | return entry; |
3387 | 0 | } |
3388 | | |
3389 | | /* Call the allocation method of the superclass. */ |
3390 | 0 | entry = bfd_hash_newfunc (entry, table, string); |
3391 | 0 | if (entry != NULL) |
3392 | 0 | { |
3393 | 0 | struct ppc_stub_hash_entry *eh; |
3394 | | |
3395 | | /* Initialize the local fields. */ |
3396 | 0 | eh = (struct ppc_stub_hash_entry *) entry; |
3397 | 0 | eh->type.main = ppc_stub_none; |
3398 | 0 | eh->type.sub = ppc_stub_toc; |
3399 | 0 | eh->type.r2save = 0; |
3400 | 0 | eh->group = NULL; |
3401 | 0 | eh->stub_offset = 0; |
3402 | 0 | eh->target_value = 0; |
3403 | 0 | eh->target_section = NULL; |
3404 | 0 | eh->h = NULL; |
3405 | 0 | eh->plt_ent = NULL; |
3406 | 0 | eh->symtype = 0; |
3407 | 0 | eh->other = 0; |
3408 | 0 | eh->id = 0; |
3409 | 0 | } |
3410 | |
|
3411 | 0 | return entry; |
3412 | 0 | } |
3413 | | |
3414 | | /* Create an entry in the branch hash table. */ |
3415 | | |
3416 | | static struct bfd_hash_entry * |
3417 | | branch_hash_newfunc (struct bfd_hash_entry *entry, |
3418 | | struct bfd_hash_table *table, |
3419 | | const char *string) |
3420 | 0 | { |
3421 | | /* Allocate the structure if it has not already been allocated by a |
3422 | | subclass. */ |
3423 | 0 | if (entry == NULL) |
3424 | 0 | { |
3425 | 0 | entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); |
3426 | 0 | if (entry == NULL) |
3427 | 0 | return entry; |
3428 | 0 | } |
3429 | | |
3430 | | /* Call the allocation method of the superclass. */ |
3431 | 0 | entry = bfd_hash_newfunc (entry, table, string); |
3432 | 0 | if (entry != NULL) |
3433 | 0 | { |
3434 | 0 | struct ppc_branch_hash_entry *eh; |
3435 | | |
3436 | | /* Initialize the local fields. */ |
3437 | 0 | eh = (struct ppc_branch_hash_entry *) entry; |
3438 | 0 | eh->offset = 0; |
3439 | 0 | eh->iter = 0; |
3440 | 0 | } |
3441 | |
|
3442 | 0 | return entry; |
3443 | 0 | } |
3444 | | |
3445 | | /* Create an entry in a ppc64 ELF linker hash table. */ |
3446 | | |
3447 | | static struct bfd_hash_entry * |
3448 | | link_hash_newfunc (struct bfd_hash_entry *entry, |
3449 | | struct bfd_hash_table *table, |
3450 | | const char *string) |
3451 | 0 | { |
3452 | | /* Allocate the structure if it has not already been allocated by a |
3453 | | subclass. */ |
3454 | 0 | if (entry == NULL) |
3455 | 0 | { |
3456 | 0 | entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); |
3457 | 0 | if (entry == NULL) |
3458 | 0 | return entry; |
3459 | 0 | } |
3460 | | |
3461 | | /* Call the allocation method of the superclass. */ |
3462 | 0 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
3463 | 0 | if (entry != NULL) |
3464 | 0 | { |
3465 | 0 | struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; |
3466 | |
|
3467 | 0 | memset (&eh->u.stub_cache, 0, |
3468 | 0 | (sizeof (struct ppc_link_hash_entry) |
3469 | 0 | - offsetof (struct ppc_link_hash_entry, u.stub_cache))); |
3470 | | |
3471 | | /* When making function calls, old ABI code references function entry |
3472 | | points (dot symbols), while new ABI code references the function |
3473 | | descriptor symbol. We need to make any combination of reference and |
3474 | | definition work together, without breaking archive linking. |
3475 | | |
3476 | | For a defined function "foo" and an undefined call to "bar": |
3477 | | An old object defines "foo" and ".foo", references ".bar" (possibly |
3478 | | "bar" too). |
3479 | | A new object defines "foo" and references "bar". |
3480 | | |
3481 | | A new object thus has no problem with its undefined symbols being |
3482 | | satisfied by definitions in an old object. On the other hand, the |
3483 | | old object won't have ".bar" satisfied by a new object. |
3484 | | |
3485 | | Keep a list of newly added dot-symbols. */ |
3486 | |
|
3487 | 0 | if (string[0] == '.') |
3488 | 0 | { |
3489 | 0 | struct ppc_link_hash_table *htab; |
3490 | |
|
3491 | 0 | htab = (struct ppc_link_hash_table *) table; |
3492 | 0 | eh->u.next_dot_sym = htab->dot_syms; |
3493 | 0 | htab->dot_syms = eh; |
3494 | 0 | } |
3495 | 0 | } |
3496 | |
|
3497 | 0 | return entry; |
3498 | 0 | } |
3499 | | |
3500 | | struct tocsave_entry |
3501 | | { |
3502 | | asection *sec; |
3503 | | bfd_vma offset; |
3504 | | }; |
3505 | | |
3506 | | static hashval_t |
3507 | | tocsave_htab_hash (const void *p) |
3508 | 0 | { |
3509 | 0 | const struct tocsave_entry *e = (const struct tocsave_entry *) p; |
3510 | 0 | return ((bfd_vma) (intptr_t) e->sec ^ e->offset) >> 3; |
3511 | 0 | } |
3512 | | |
3513 | | static int |
3514 | | tocsave_htab_eq (const void *p1, const void *p2) |
3515 | 0 | { |
3516 | 0 | const struct tocsave_entry *e1 = (const struct tocsave_entry *) p1; |
3517 | 0 | const struct tocsave_entry *e2 = (const struct tocsave_entry *) p2; |
3518 | 0 | return e1->sec == e2->sec && e1->offset == e2->offset; |
3519 | 0 | } |
3520 | | |
3521 | | /* Destroy a ppc64 ELF linker hash table. */ |
3522 | | |
3523 | | static void |
3524 | | ppc64_elf_link_hash_table_free (bfd *obfd) |
3525 | 0 | { |
3526 | 0 | struct ppc_link_hash_table *htab; |
3527 | |
|
3528 | 0 | htab = (struct ppc_link_hash_table *) obfd->link.hash; |
3529 | 0 | free (htab->relr); |
3530 | 0 | if (htab->tocsave_htab) |
3531 | 0 | htab_delete (htab->tocsave_htab); |
3532 | 0 | bfd_hash_table_free (&htab->branch_hash_table); |
3533 | 0 | bfd_hash_table_free (&htab->stub_hash_table); |
3534 | 0 | _bfd_elf_link_hash_table_free (obfd); |
3535 | 0 | } |
3536 | | |
3537 | | /* Create a ppc64 ELF linker hash table. */ |
3538 | | |
3539 | | static struct bfd_link_hash_table * |
3540 | | ppc64_elf_link_hash_table_create (bfd *abfd) |
3541 | 0 | { |
3542 | 0 | struct ppc_link_hash_table *htab; |
3543 | 0 | size_t amt = sizeof (struct ppc_link_hash_table); |
3544 | |
|
3545 | 0 | htab = bfd_zmalloc (amt); |
3546 | 0 | if (htab == NULL) |
3547 | 0 | return NULL; |
3548 | | |
3549 | 0 | if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc, |
3550 | 0 | sizeof (struct ppc_link_hash_entry))) |
3551 | 0 | { |
3552 | 0 | free (htab); |
3553 | 0 | return NULL; |
3554 | 0 | } |
3555 | | |
3556 | | /* Init the stub hash table too. */ |
3557 | 0 | if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc, |
3558 | 0 | sizeof (struct ppc_stub_hash_entry))) |
3559 | 0 | { |
3560 | 0 | _bfd_elf_link_hash_table_free (abfd); |
3561 | 0 | return NULL; |
3562 | 0 | } |
3563 | | |
3564 | | /* And the branch hash table. */ |
3565 | 0 | if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc, |
3566 | 0 | sizeof (struct ppc_branch_hash_entry))) |
3567 | 0 | { |
3568 | 0 | bfd_hash_table_free (&htab->stub_hash_table); |
3569 | 0 | _bfd_elf_link_hash_table_free (abfd); |
3570 | 0 | return NULL; |
3571 | 0 | } |
3572 | | |
3573 | 0 | htab->tocsave_htab = htab_try_create (1024, |
3574 | 0 | tocsave_htab_hash, |
3575 | 0 | tocsave_htab_eq, |
3576 | 0 | NULL); |
3577 | 0 | if (htab->tocsave_htab == NULL) |
3578 | 0 | { |
3579 | 0 | ppc64_elf_link_hash_table_free (abfd); |
3580 | 0 | return NULL; |
3581 | 0 | } |
3582 | 0 | htab->elf.root.hash_table_free = ppc64_elf_link_hash_table_free; |
3583 | | |
3584 | | /* Initializing two fields of the union is just cosmetic. We really |
3585 | | only care about glist, but when compiled on a 32-bit host the |
3586 | | bfd_vma fields are larger. Setting the bfd_vma to zero makes |
3587 | | debugger inspection of these fields look nicer. */ |
3588 | 0 | htab->elf.init_got_refcount.refcount = 0; |
3589 | 0 | htab->elf.init_got_refcount.glist = NULL; |
3590 | 0 | htab->elf.init_plt_refcount.refcount = 0; |
3591 | 0 | htab->elf.init_plt_refcount.glist = NULL; |
3592 | 0 | htab->elf.init_got_offset.offset = 0; |
3593 | 0 | htab->elf.init_got_offset.glist = NULL; |
3594 | 0 | htab->elf.init_plt_offset.offset = 0; |
3595 | 0 | htab->elf.init_plt_offset.glist = NULL; |
3596 | |
|
3597 | 0 | return &htab->elf.root; |
3598 | 0 | } |
3599 | | |
3600 | | /* Create sections for linker generated code. */ |
3601 | | |
3602 | | static bool |
3603 | | create_linkage_sections (bfd *dynobj, struct bfd_link_info *info) |
3604 | 0 | { |
3605 | 0 | struct ppc_link_hash_table *htab; |
3606 | 0 | flagword flags; |
3607 | |
|
3608 | 0 | htab = ppc_hash_table (info); |
3609 | |
|
3610 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
3611 | 0 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
3612 | 0 | if (htab->params->save_restore_funcs) |
3613 | 0 | { |
3614 | | /* Create .sfpr for code to save and restore fp regs. */ |
3615 | 0 | htab->sfpr = bfd_make_section_anyway_with_flags (dynobj, ".sfpr", |
3616 | 0 | flags); |
3617 | 0 | if (htab->sfpr == NULL |
3618 | 0 | || !bfd_set_section_alignment (htab->sfpr, 2)) |
3619 | 0 | return false; |
3620 | 0 | } |
3621 | | |
3622 | 0 | if (bfd_link_relocatable (info)) |
3623 | 0 | return true; |
3624 | | |
3625 | | /* Create .glink for lazy dynamic linking support. */ |
3626 | 0 | htab->glink = bfd_make_section_anyway_with_flags (dynobj, ".glink", |
3627 | 0 | flags); |
3628 | 0 | if (htab->glink == NULL |
3629 | 0 | || !bfd_set_section_alignment (htab->glink, 3)) |
3630 | 0 | return false; |
3631 | | |
3632 | | /* The part of .glink used by global entry stubs, separate so that |
3633 | | it can be aligned appropriately without affecting htab->glink. */ |
3634 | 0 | htab->global_entry = bfd_make_section_anyway_with_flags (dynobj, ".glink", |
3635 | 0 | flags); |
3636 | 0 | if (htab->global_entry == NULL |
3637 | 0 | || !bfd_set_section_alignment (htab->global_entry, 2)) |
3638 | 0 | return false; |
3639 | | |
3640 | 0 | if (!info->no_ld_generated_unwind_info) |
3641 | 0 | { |
3642 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS |
3643 | 0 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
3644 | 0 | htab->glink_eh_frame = bfd_make_section_anyway_with_flags (dynobj, |
3645 | 0 | ".eh_frame", |
3646 | 0 | flags); |
3647 | 0 | if (htab->glink_eh_frame == NULL |
3648 | 0 | || !bfd_set_section_alignment (htab->glink_eh_frame, 2)) |
3649 | 0 | return false; |
3650 | 0 | } |
3651 | | |
3652 | 0 | flags = SEC_ALLOC | SEC_LINKER_CREATED; |
3653 | 0 | htab->elf.iplt = bfd_make_section_anyway_with_flags (dynobj, ".iplt", flags); |
3654 | 0 | if (htab->elf.iplt == NULL |
3655 | 0 | || !bfd_set_section_alignment (htab->elf.iplt, 3)) |
3656 | 0 | return false; |
3657 | | |
3658 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
3659 | 0 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
3660 | 0 | htab->elf.irelplt |
3661 | 0 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.iplt", flags); |
3662 | 0 | if (htab->elf.irelplt == NULL |
3663 | 0 | || !bfd_set_section_alignment (htab->elf.irelplt, 3)) |
3664 | 0 | return false; |
3665 | | |
3666 | | /* Create branch lookup table for plt_branch stubs. */ |
3667 | 0 | flags = (SEC_ALLOC | SEC_LOAD |
3668 | 0 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
3669 | 0 | htab->brlt = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", |
3670 | 0 | flags); |
3671 | 0 | if (htab->brlt == NULL |
3672 | 0 | || !bfd_set_section_alignment (htab->brlt, 3)) |
3673 | 0 | return false; |
3674 | | |
3675 | | /* Local plt entries, put in .branch_lt but a separate section for |
3676 | | convenience. */ |
3677 | 0 | htab->pltlocal = bfd_make_section_anyway_with_flags (dynobj, ".branch_lt", |
3678 | 0 | flags); |
3679 | 0 | if (htab->pltlocal == NULL |
3680 | 0 | || !bfd_set_section_alignment (htab->pltlocal, 3)) |
3681 | 0 | return false; |
3682 | | |
3683 | 0 | if (!bfd_link_pic (info)) |
3684 | 0 | return true; |
3685 | | |
3686 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
3687 | 0 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
3688 | 0 | htab->relbrlt |
3689 | 0 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags); |
3690 | 0 | if (htab->relbrlt == NULL |
3691 | 0 | || !bfd_set_section_alignment (htab->relbrlt, 3)) |
3692 | 0 | return false; |
3693 | | |
3694 | 0 | htab->relpltlocal |
3695 | 0 | = bfd_make_section_anyway_with_flags (dynobj, ".rela.branch_lt", flags); |
3696 | 0 | if (htab->relpltlocal == NULL |
3697 | 0 | || !bfd_set_section_alignment (htab->relpltlocal, 3)) |
3698 | 0 | return false; |
3699 | | |
3700 | 0 | return true; |
3701 | 0 | } |
3702 | | |
3703 | | /* Satisfy the ELF linker by filling in some fields in our fake bfd. */ |
3704 | | |
3705 | | bool |
3706 | | ppc64_elf_init_stub_bfd (struct bfd_link_info *info, |
3707 | | struct ppc64_elf_params *params) |
3708 | 0 | { |
3709 | 0 | struct ppc_link_hash_table *htab; |
3710 | |
|
3711 | 0 | elf_elfheader (params->stub_bfd)->e_ident[EI_CLASS] = ELFCLASS64; |
3712 | | |
3713 | | /* Always hook our dynamic sections into the first bfd, which is the |
3714 | | linker created stub bfd. This ensures that the GOT header is at |
3715 | | the start of the output TOC section. */ |
3716 | 0 | htab = ppc_hash_table (info); |
3717 | 0 | htab->elf.dynobj = params->stub_bfd; |
3718 | 0 | htab->params = params; |
3719 | |
|
3720 | 0 | return create_linkage_sections (htab->elf.dynobj, info); |
3721 | 0 | } |
3722 | | |
3723 | | /* Build a name for an entry in the stub hash table. */ |
3724 | | |
3725 | | static char * |
3726 | | ppc_stub_name (const asection *input_section, |
3727 | | const asection *sym_sec, |
3728 | | const struct ppc_link_hash_entry *h, |
3729 | | const Elf_Internal_Rela *rel) |
3730 | 0 | { |
3731 | 0 | char *stub_name; |
3732 | 0 | ssize_t len; |
3733 | | |
3734 | | /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 |
3735 | | offsets from a sym as a branch target? In fact, we could |
3736 | | probably assume the addend is always zero. */ |
3737 | 0 | BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); |
3738 | |
|
3739 | 0 | if (h) |
3740 | 0 | { |
3741 | 0 | len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; |
3742 | 0 | stub_name = bfd_malloc (len); |
3743 | 0 | if (stub_name == NULL) |
3744 | 0 | return stub_name; |
3745 | | |
3746 | 0 | len = sprintf (stub_name, "%08x.%s+%x", |
3747 | 0 | input_section->id & 0xffffffff, |
3748 | 0 | h->elf.root.root.string, |
3749 | 0 | (int) rel->r_addend & 0xffffffff); |
3750 | 0 | } |
3751 | 0 | else |
3752 | 0 | { |
3753 | 0 | len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
3754 | 0 | stub_name = bfd_malloc (len); |
3755 | 0 | if (stub_name == NULL) |
3756 | 0 | return stub_name; |
3757 | | |
3758 | 0 | len = sprintf (stub_name, "%08x.%x:%x+%x", |
3759 | 0 | input_section->id & 0xffffffff, |
3760 | 0 | sym_sec->id & 0xffffffff, |
3761 | 0 | (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, |
3762 | 0 | (int) rel->r_addend & 0xffffffff); |
3763 | 0 | } |
3764 | 0 | if (len > 2 && stub_name[len - 2] == '+' && stub_name[len - 1] == '0') |
3765 | 0 | stub_name[len - 2] = 0; |
3766 | 0 | return stub_name; |
3767 | 0 | } |
3768 | | |
3769 | | /* If mixing power10 with non-power10 code and --power10-stubs is not |
3770 | | specified (or is auto) then there may be multiple stub types for any |
3771 | | given symbol. Up to three classes of stubs are stored in separate |
3772 | | stub_hash_table entries having the same key string. The entries |
3773 | | will always be adjacent on entry->root.next chain, even if hash |
3774 | | table resizing occurs. This function selects the correct entry to |
3775 | | use. */ |
3776 | | |
3777 | | static struct ppc_stub_hash_entry * |
3778 | | select_alt_stub (struct ppc_stub_hash_entry *entry, |
3779 | | enum elf_ppc64_reloc_type r_type) |
3780 | 0 | { |
3781 | 0 | enum ppc_stub_sub_type subt; |
3782 | |
|
3783 | 0 | switch (r_type) |
3784 | 0 | { |
3785 | 0 | case R_PPC64_REL24_NOTOC: |
3786 | 0 | subt = ppc_stub_notoc; |
3787 | 0 | break; |
3788 | 0 | case R_PPC64_REL24_P9NOTOC: |
3789 | 0 | subt = ppc_stub_p9notoc; |
3790 | 0 | break; |
3791 | 0 | default: |
3792 | 0 | subt = ppc_stub_toc; |
3793 | 0 | break; |
3794 | 0 | } |
3795 | | |
3796 | 0 | while (entry != NULL && entry->type.sub != subt) |
3797 | 0 | { |
3798 | 0 | const char *stub_name = entry->root.string; |
3799 | |
|
3800 | 0 | entry = (struct ppc_stub_hash_entry *) entry->root.next; |
3801 | 0 | if (entry != NULL |
3802 | 0 | && entry->root.string != stub_name) |
3803 | 0 | entry = NULL; |
3804 | 0 | } |
3805 | |
|
3806 | 0 | return entry; |
3807 | 0 | } |
3808 | | |
3809 | | /* Look up an entry in the stub hash. Stub entries are cached because |
3810 | | creating the stub name takes a bit of time. */ |
3811 | | |
3812 | | static struct ppc_stub_hash_entry * |
3813 | | ppc_get_stub_entry (const asection *input_section, |
3814 | | const asection *sym_sec, |
3815 | | struct ppc_link_hash_entry *h, |
3816 | | const Elf_Internal_Rela *rel, |
3817 | | struct ppc_link_hash_table *htab) |
3818 | 0 | { |
3819 | 0 | struct ppc_stub_hash_entry *stub_entry; |
3820 | 0 | struct map_stub *group; |
3821 | | |
3822 | | /* If this input section is part of a group of sections sharing one |
3823 | | stub section, then use the id of the first section in the group. |
3824 | | Stub names need to include a section id, as there may well be |
3825 | | more than one stub used to reach say, printf, and we need to |
3826 | | distinguish between them. */ |
3827 | 0 | group = htab->sec_info[input_section->id].u.group; |
3828 | 0 | if (group == NULL) |
3829 | 0 | return NULL; |
3830 | | |
3831 | 0 | if (h != NULL && h->u.stub_cache != NULL |
3832 | 0 | && h->u.stub_cache->h == h |
3833 | 0 | && h->u.stub_cache->group == group) |
3834 | 0 | { |
3835 | 0 | stub_entry = h->u.stub_cache; |
3836 | 0 | } |
3837 | 0 | else |
3838 | 0 | { |
3839 | 0 | char *stub_name; |
3840 | |
|
3841 | 0 | stub_name = ppc_stub_name (group->link_sec, sym_sec, h, rel); |
3842 | 0 | if (stub_name == NULL) |
3843 | 0 | return NULL; |
3844 | | |
3845 | 0 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
3846 | 0 | stub_name, false, false); |
3847 | 0 | if (h != NULL) |
3848 | 0 | h->u.stub_cache = stub_entry; |
3849 | |
|
3850 | 0 | free (stub_name); |
3851 | 0 | } |
3852 | | |
3853 | 0 | if (stub_entry != NULL && htab->params->power10_stubs == -1) |
3854 | 0 | stub_entry = select_alt_stub (stub_entry, ELF64_R_TYPE (rel->r_info)); |
3855 | |
|
3856 | 0 | return stub_entry; |
3857 | 0 | } |
3858 | | |
3859 | | /* Add a new stub entry to the stub hash. Not all fields of the new |
3860 | | stub entry are initialised. */ |
3861 | | |
3862 | | static struct ppc_stub_hash_entry * |
3863 | | ppc_add_stub (const char *stub_name, |
3864 | | asection *section, |
3865 | | struct bfd_link_info *info) |
3866 | 0 | { |
3867 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
3868 | 0 | struct map_stub *group; |
3869 | 0 | asection *link_sec; |
3870 | 0 | asection *stub_sec; |
3871 | 0 | struct ppc_stub_hash_entry *stub_entry; |
3872 | |
|
3873 | 0 | group = htab->sec_info[section->id].u.group; |
3874 | 0 | link_sec = group->link_sec; |
3875 | 0 | stub_sec = group->stub_sec; |
3876 | 0 | if (stub_sec == NULL) |
3877 | 0 | { |
3878 | 0 | size_t namelen; |
3879 | 0 | bfd_size_type len; |
3880 | 0 | char *s_name; |
3881 | |
|
3882 | 0 | namelen = strlen (link_sec->name); |
3883 | 0 | len = namelen + sizeof (STUB_SUFFIX); |
3884 | 0 | s_name = bfd_alloc (htab->params->stub_bfd, len); |
3885 | 0 | if (s_name == NULL) |
3886 | 0 | return NULL; |
3887 | | |
3888 | 0 | memcpy (s_name, link_sec->name, namelen); |
3889 | 0 | memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
3890 | 0 | stub_sec = (*htab->params->add_stub_section) (s_name, link_sec); |
3891 | 0 | if (stub_sec == NULL) |
3892 | 0 | return NULL; |
3893 | 0 | group->stub_sec = stub_sec; |
3894 | 0 | } |
3895 | | |
3896 | | /* Enter this entry into the linker stub hash table. */ |
3897 | 0 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
3898 | 0 | true, true); |
3899 | 0 | if (stub_entry == NULL) |
3900 | 0 | { |
3901 | | /* xgettext:c-format */ |
3902 | 0 | _bfd_error_handler (_("%pB: cannot create stub entry %s"), |
3903 | 0 | section->owner, stub_name); |
3904 | 0 | return NULL; |
3905 | 0 | } |
3906 | | |
3907 | 0 | stub_entry->group = group; |
3908 | 0 | stub_entry->stub_offset = 0; |
3909 | 0 | return stub_entry; |
3910 | 0 | } |
3911 | | |
3912 | | /* A stub has already been created, but it may not be the required |
3913 | | type. We shouldn't be transitioning from plt_call to long_branch |
3914 | | stubs or vice versa, but we might be upgrading from plt_call to |
3915 | | plt_call with r2save for example. */ |
3916 | | |
3917 | | static bool |
3918 | | ppc_merge_stub (struct ppc_link_hash_table *htab, |
3919 | | struct ppc_stub_hash_entry *stub_entry, |
3920 | | struct ppc_stub_type stub_type, |
3921 | | enum elf_ppc64_reloc_type r_type) |
3922 | 0 | { |
3923 | 0 | struct ppc_stub_type old_type = stub_entry->type; |
3924 | |
|
3925 | 0 | if (old_type.main == ppc_stub_save_res) |
3926 | 0 | return true; |
3927 | | |
3928 | 0 | if (htab->params->power10_stubs == -1) |
3929 | 0 | { |
3930 | | /* For --power10-stubs=auto, don't merge _notoc and other |
3931 | | varieties of stubs. */ |
3932 | 0 | struct ppc_stub_hash_entry *alt_stub; |
3933 | |
|
3934 | 0 | alt_stub = select_alt_stub (stub_entry, r_type); |
3935 | 0 | if (alt_stub == NULL) |
3936 | 0 | { |
3937 | 0 | alt_stub = ((struct ppc_stub_hash_entry *) |
3938 | 0 | stub_hash_newfunc (NULL, |
3939 | 0 | &htab->stub_hash_table, |
3940 | 0 | stub_entry->root.string)); |
3941 | 0 | if (alt_stub == NULL) |
3942 | 0 | return false; |
3943 | | |
3944 | 0 | *alt_stub = *stub_entry; |
3945 | 0 | stub_entry->root.next = &alt_stub->root; |
3946 | | |
3947 | | /* Sort notoc stubs first, then toc stubs, then p9notoc. |
3948 | | Not that it matters, this just puts smaller stubs first. */ |
3949 | 0 | if (stub_type.sub == ppc_stub_notoc) |
3950 | 0 | alt_stub = stub_entry; |
3951 | 0 | else if (stub_type.sub == ppc_stub_p9notoc |
3952 | 0 | && alt_stub->root.next |
3953 | 0 | && alt_stub->root.next->string == alt_stub->root.string) |
3954 | 0 | { |
3955 | 0 | struct ppc_stub_hash_entry *next |
3956 | 0 | = (struct ppc_stub_hash_entry *) alt_stub->root.next; |
3957 | 0 | alt_stub->type = next->type; |
3958 | 0 | alt_stub = next; |
3959 | 0 | } |
3960 | 0 | alt_stub->type = stub_type; |
3961 | 0 | return true; |
3962 | 0 | } |
3963 | 0 | stub_entry = alt_stub; |
3964 | 0 | } |
3965 | | |
3966 | 0 | old_type = stub_entry->type; |
3967 | 0 | if (old_type.main == ppc_stub_plt_branch) |
3968 | 0 | old_type.main = ppc_stub_long_branch; |
3969 | |
|
3970 | 0 | if (old_type.main != stub_type.main |
3971 | 0 | || (old_type.sub != stub_type.sub |
3972 | 0 | && old_type.sub != ppc_stub_toc |
3973 | 0 | && stub_type.sub != ppc_stub_toc)) |
3974 | 0 | abort (); |
3975 | | |
3976 | 0 | stub_entry->type.sub |= stub_type.sub; |
3977 | 0 | stub_entry->type.r2save |= stub_type.r2save; |
3978 | 0 | return true; |
3979 | 0 | } |
3980 | | |
3981 | | /* Create .got and .rela.got sections in ABFD, and .got in dynobj if |
3982 | | not already done. */ |
3983 | | |
3984 | | static bool |
3985 | | create_got_section (bfd *abfd, struct bfd_link_info *info) |
3986 | 0 | { |
3987 | 0 | asection *got, *relgot; |
3988 | 0 | flagword flags; |
3989 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
3990 | |
|
3991 | 0 | if (!is_ppc64_elf (abfd)) |
3992 | 0 | return false; |
3993 | 0 | if (htab == NULL) |
3994 | 0 | return false; |
3995 | | |
3996 | 0 | if (!htab->elf.sgot |
3997 | 0 | && !_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
3998 | 0 | return false; |
3999 | | |
4000 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
4001 | 0 | | SEC_LINKER_CREATED); |
4002 | |
|
4003 | 0 | got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
4004 | 0 | if (!got |
4005 | 0 | || !bfd_set_section_alignment (got, 3)) |
4006 | 0 | return false; |
4007 | | |
4008 | 0 | relgot = bfd_make_section_anyway_with_flags (abfd, ".rela.got", |
4009 | 0 | flags | SEC_READONLY); |
4010 | 0 | if (!relgot |
4011 | 0 | || !bfd_set_section_alignment (relgot, 3)) |
4012 | 0 | return false; |
4013 | | |
4014 | 0 | ppc64_elf_tdata (abfd)->got = got; |
4015 | 0 | ppc64_elf_tdata (abfd)->relgot = relgot; |
4016 | 0 | return true; |
4017 | 0 | } |
4018 | | |
4019 | | /* Follow indirect and warning symbol links. */ |
4020 | | |
4021 | | static inline struct bfd_link_hash_entry * |
4022 | | follow_link (struct bfd_link_hash_entry *h) |
4023 | 0 | { |
4024 | 0 | while (h->type == bfd_link_hash_indirect |
4025 | 0 | || h->type == bfd_link_hash_warning) |
4026 | 0 | h = h->u.i.link; |
4027 | 0 | return h; |
4028 | 0 | } |
4029 | | |
4030 | | static inline struct elf_link_hash_entry * |
4031 | | elf_follow_link (struct elf_link_hash_entry *h) |
4032 | 0 | { |
4033 | 0 | return (struct elf_link_hash_entry *) follow_link (&h->root); |
4034 | 0 | } |
4035 | | |
4036 | | static inline struct ppc_link_hash_entry * |
4037 | | ppc_follow_link (struct ppc_link_hash_entry *h) |
4038 | 0 | { |
4039 | 0 | return ppc_elf_hash_entry (elf_follow_link (&h->elf)); |
4040 | 0 | } |
4041 | | |
4042 | | /* Merge PLT info on FROM with that on TO. */ |
4043 | | |
4044 | | static void |
4045 | | move_plt_plist (struct ppc_link_hash_entry *from, |
4046 | | struct ppc_link_hash_entry *to) |
4047 | 0 | { |
4048 | 0 | if (from->elf.plt.plist != NULL) |
4049 | 0 | { |
4050 | 0 | if (to->elf.plt.plist != NULL) |
4051 | 0 | { |
4052 | 0 | struct plt_entry **entp; |
4053 | 0 | struct plt_entry *ent; |
4054 | |
|
4055 | 0 | for (entp = &from->elf.plt.plist; (ent = *entp) != NULL; ) |
4056 | 0 | { |
4057 | 0 | struct plt_entry *dent; |
4058 | |
|
4059 | 0 | for (dent = to->elf.plt.plist; dent != NULL; dent = dent->next) |
4060 | 0 | if (dent->addend == ent->addend) |
4061 | 0 | { |
4062 | 0 | dent->plt.refcount += ent->plt.refcount; |
4063 | 0 | *entp = ent->next; |
4064 | 0 | break; |
4065 | 0 | } |
4066 | 0 | if (dent == NULL) |
4067 | 0 | entp = &ent->next; |
4068 | 0 | } |
4069 | 0 | *entp = to->elf.plt.plist; |
4070 | 0 | } |
4071 | |
|
4072 | 0 | to->elf.plt.plist = from->elf.plt.plist; |
4073 | 0 | from->elf.plt.plist = NULL; |
4074 | 0 | } |
4075 | 0 | } |
4076 | | |
4077 | | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
4078 | | |
4079 | | static void |
4080 | | ppc64_elf_copy_indirect_symbol (struct bfd_link_info *info, |
4081 | | struct elf_link_hash_entry *dir, |
4082 | | struct elf_link_hash_entry *ind) |
4083 | 0 | { |
4084 | 0 | struct ppc_link_hash_entry *edir, *eind; |
4085 | |
|
4086 | 0 | edir = ppc_elf_hash_entry (dir); |
4087 | 0 | eind = ppc_elf_hash_entry (ind); |
4088 | |
|
4089 | 0 | edir->is_func |= eind->is_func; |
4090 | 0 | edir->is_func_descriptor |= eind->is_func_descriptor; |
4091 | 0 | edir->tls_mask |= eind->tls_mask; |
4092 | 0 | if (eind->oh != NULL) |
4093 | 0 | edir->oh = ppc_follow_link (eind->oh); |
4094 | |
|
4095 | 0 | if (edir->elf.versioned != versioned_hidden) |
4096 | 0 | edir->elf.ref_dynamic |= eind->elf.ref_dynamic; |
4097 | 0 | edir->elf.ref_regular |= eind->elf.ref_regular; |
4098 | 0 | edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak; |
4099 | 0 | edir->elf.non_got_ref |= eind->elf.non_got_ref; |
4100 | 0 | edir->elf.needs_plt |= eind->elf.needs_plt; |
4101 | 0 | edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed; |
4102 | | |
4103 | | /* If we were called to copy over info for a weak sym, don't copy |
4104 | | dyn_relocs, plt/got info, or dynindx. We used to copy dyn_relocs |
4105 | | in order to simplify readonly_dynrelocs and save a field in the |
4106 | | symbol hash entry, but that means dyn_relocs can't be used in any |
4107 | | tests about a specific symbol, or affect other symbol flags which |
4108 | | are then tested. */ |
4109 | 0 | if (eind->elf.root.type != bfd_link_hash_indirect) |
4110 | 0 | return; |
4111 | | |
4112 | | /* Copy over any dynamic relocs we may have on the indirect sym. */ |
4113 | 0 | if (ind->dyn_relocs != NULL) |
4114 | 0 | { |
4115 | 0 | if (dir->dyn_relocs != NULL) |
4116 | 0 | { |
4117 | 0 | struct ppc_dyn_relocs **pp; |
4118 | 0 | struct ppc_dyn_relocs *p; |
4119 | | |
4120 | | /* Add reloc counts against the indirect sym to the direct sym |
4121 | | list. Merge any entries against the same section. */ |
4122 | 0 | for (pp = (struct ppc_dyn_relocs **) &ind->dyn_relocs; |
4123 | 0 | (p = *pp) != NULL; |
4124 | 0 | ) |
4125 | 0 | { |
4126 | 0 | struct ppc_dyn_relocs *q; |
4127 | |
|
4128 | 0 | for (q = (struct ppc_dyn_relocs *) dir->dyn_relocs; |
4129 | 0 | q != NULL; |
4130 | 0 | q = q->next) |
4131 | 0 | if (q->sec == p->sec) |
4132 | 0 | { |
4133 | 0 | q->count += p->count; |
4134 | 0 | q->pc_count += p->pc_count; |
4135 | 0 | q->rel_count += p->rel_count; |
4136 | 0 | *pp = p->next; |
4137 | 0 | break; |
4138 | 0 | } |
4139 | 0 | if (q == NULL) |
4140 | 0 | pp = &p->next; |
4141 | 0 | } |
4142 | 0 | *pp = (struct ppc_dyn_relocs *) dir->dyn_relocs; |
4143 | 0 | } |
4144 | |
|
4145 | 0 | dir->dyn_relocs = ind->dyn_relocs; |
4146 | 0 | ind->dyn_relocs = NULL; |
4147 | 0 | } |
4148 | | |
4149 | | /* Copy over got entries that we may have already seen to the |
4150 | | symbol which just became indirect. */ |
4151 | 0 | if (eind->elf.got.glist != NULL) |
4152 | 0 | { |
4153 | 0 | if (edir->elf.got.glist != NULL) |
4154 | 0 | { |
4155 | 0 | struct got_entry **entp; |
4156 | 0 | struct got_entry *ent; |
4157 | |
|
4158 | 0 | for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) |
4159 | 0 | { |
4160 | 0 | struct got_entry *dent; |
4161 | |
|
4162 | 0 | for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) |
4163 | 0 | if (dent->addend == ent->addend |
4164 | 0 | && dent->owner == ent->owner |
4165 | 0 | && dent->tls_type == ent->tls_type) |
4166 | 0 | { |
4167 | 0 | dent->got.refcount += ent->got.refcount; |
4168 | 0 | *entp = ent->next; |
4169 | 0 | break; |
4170 | 0 | } |
4171 | 0 | if (dent == NULL) |
4172 | 0 | entp = &ent->next; |
4173 | 0 | } |
4174 | 0 | *entp = edir->elf.got.glist; |
4175 | 0 | } |
4176 | |
|
4177 | 0 | edir->elf.got.glist = eind->elf.got.glist; |
4178 | 0 | eind->elf.got.glist = NULL; |
4179 | 0 | } |
4180 | | |
4181 | | /* And plt entries. */ |
4182 | 0 | move_plt_plist (eind, edir); |
4183 | |
|
4184 | 0 | if (eind->elf.dynindx != -1) |
4185 | 0 | { |
4186 | 0 | if (edir->elf.dynindx != -1) |
4187 | 0 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
4188 | 0 | edir->elf.dynstr_index); |
4189 | 0 | edir->elf.dynindx = eind->elf.dynindx; |
4190 | 0 | edir->elf.dynstr_index = eind->elf.dynstr_index; |
4191 | 0 | eind->elf.dynindx = -1; |
4192 | 0 | eind->elf.dynstr_index = 0; |
4193 | 0 | } |
4194 | 0 | } |
4195 | | |
4196 | | /* Find the function descriptor hash entry from the given function code |
4197 | | hash entry FH. Link the entries via their OH fields. */ |
4198 | | |
4199 | | static struct ppc_link_hash_entry * |
4200 | | lookup_fdh (struct ppc_link_hash_entry *fh, struct ppc_link_hash_table *htab) |
4201 | 0 | { |
4202 | 0 | struct ppc_link_hash_entry *fdh = fh->oh; |
4203 | |
|
4204 | 0 | if (fdh == NULL) |
4205 | 0 | { |
4206 | 0 | const char *fd_name = fh->elf.root.root.string + 1; |
4207 | |
|
4208 | 0 | fdh = ppc_elf_hash_entry (elf_link_hash_lookup (&htab->elf, fd_name, |
4209 | 0 | false, false, false)); |
4210 | 0 | if (fdh == NULL) |
4211 | 0 | return fdh; |
4212 | | |
4213 | 0 | fdh->is_func_descriptor = 1; |
4214 | 0 | fdh->oh = fh; |
4215 | 0 | fh->is_func = 1; |
4216 | 0 | fh->oh = fdh; |
4217 | 0 | } |
4218 | | |
4219 | 0 | fdh = ppc_follow_link (fdh); |
4220 | 0 | fdh->is_func_descriptor = 1; |
4221 | 0 | fdh->oh = fh; |
4222 | 0 | return fdh; |
4223 | 0 | } |
4224 | | |
4225 | | /* Make a fake function descriptor sym for the undefined code sym FH. */ |
4226 | | |
4227 | | static struct ppc_link_hash_entry * |
4228 | | make_fdh (struct bfd_link_info *info, |
4229 | | struct ppc_link_hash_entry *fh) |
4230 | 0 | { |
4231 | 0 | bfd *abfd = fh->elf.root.u.undef.abfd; |
4232 | 0 | struct bfd_link_hash_entry *bh = NULL; |
4233 | 0 | struct ppc_link_hash_entry *fdh; |
4234 | 0 | flagword flags = (fh->elf.root.type == bfd_link_hash_undefweak |
4235 | 0 | ? BSF_WEAK |
4236 | 0 | : BSF_GLOBAL); |
4237 | |
|
4238 | 0 | if (!_bfd_generic_link_add_one_symbol (info, abfd, |
4239 | 0 | fh->elf.root.root.string + 1, |
4240 | 0 | flags, bfd_und_section_ptr, 0, |
4241 | 0 | NULL, false, false, &bh)) |
4242 | 0 | return NULL; |
4243 | | |
4244 | 0 | fdh = (struct ppc_link_hash_entry *) bh; |
4245 | 0 | fdh->elf.non_elf = 0; |
4246 | 0 | fdh->fake = 1; |
4247 | 0 | fdh->is_func_descriptor = 1; |
4248 | 0 | fdh->oh = fh; |
4249 | 0 | fh->is_func = 1; |
4250 | 0 | fh->oh = fdh; |
4251 | 0 | return fdh; |
4252 | 0 | } |
4253 | | |
4254 | | /* Fix function descriptor symbols defined in .opd sections to be |
4255 | | function type. */ |
4256 | | |
4257 | | static bool |
4258 | | ppc64_elf_add_symbol_hook (bfd *ibfd, |
4259 | | struct bfd_link_info *info, |
4260 | | Elf_Internal_Sym *isym, |
4261 | | const char **name, |
4262 | | flagword *flags ATTRIBUTE_UNUSED, |
4263 | | asection **sec, |
4264 | | bfd_vma *value) |
4265 | 0 | { |
4266 | 0 | if (*sec != NULL |
4267 | 0 | && strcmp ((*sec)->name, ".opd") == 0) |
4268 | 0 | { |
4269 | 0 | asection *code_sec; |
4270 | |
|
4271 | 0 | if (!(ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC |
4272 | 0 | || ELF_ST_TYPE (isym->st_info) == STT_FUNC)) |
4273 | 0 | isym->st_info = ELF_ST_INFO (ELF_ST_BIND (isym->st_info), STT_FUNC); |
4274 | | |
4275 | | /* If the symbol is a function defined in .opd, and the function |
4276 | | code is in a discarded group, let it appear to be undefined. */ |
4277 | 0 | if (!bfd_link_relocatable (info) |
4278 | 0 | && (*sec)->reloc_count != 0 |
4279 | 0 | && opd_entry_value (*sec, *value, &code_sec, NULL, |
4280 | 0 | false) != (bfd_vma) -1 |
4281 | 0 | && discarded_section (code_sec)) |
4282 | 0 | { |
4283 | 0 | *sec = bfd_und_section_ptr; |
4284 | 0 | isym->st_shndx = SHN_UNDEF; |
4285 | 0 | } |
4286 | 0 | } |
4287 | 0 | else if (*sec != NULL |
4288 | 0 | && strcmp ((*sec)->name, ".toc") == 0 |
4289 | 0 | && ELF_ST_TYPE (isym->st_info) == STT_OBJECT) |
4290 | 0 | { |
4291 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
4292 | 0 | if (htab != NULL) |
4293 | 0 | htab->params->object_in_toc = 1; |
4294 | 0 | } |
4295 | |
|
4296 | 0 | if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0) |
4297 | 0 | { |
4298 | 0 | if (abiversion (ibfd) == 0) |
4299 | 0 | set_abiversion (ibfd, 2); |
4300 | 0 | else if (abiversion (ibfd) == 1) |
4301 | 0 | { |
4302 | 0 | _bfd_error_handler (_("symbol '%s' has invalid st_other" |
4303 | 0 | " for ABI version 1"), *name); |
4304 | 0 | bfd_set_error (bfd_error_bad_value); |
4305 | 0 | return false; |
4306 | 0 | } |
4307 | 0 | } |
4308 | | |
4309 | 0 | return true; |
4310 | 0 | } |
4311 | | |
4312 | | /* Merge non-visibility st_other attributes: local entry point. */ |
4313 | | |
4314 | | static void |
4315 | | ppc64_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, |
4316 | | unsigned int st_other, |
4317 | | bool definition, |
4318 | | bool dynamic) |
4319 | 0 | { |
4320 | 0 | if (definition && (!dynamic || !h->def_regular)) |
4321 | 0 | h->other = ((st_other & ~ELF_ST_VISIBILITY (-1)) |
4322 | 0 | | ELF_ST_VISIBILITY (h->other)); |
4323 | 0 | } |
4324 | | |
4325 | | /* Hook called on merging a symbol. We use this to clear "fake" since |
4326 | | we now have a real symbol. */ |
4327 | | |
4328 | | static bool |
4329 | | ppc64_elf_merge_symbol (struct elf_link_hash_entry *h, |
4330 | | const Elf_Internal_Sym *isym, |
4331 | | asection **psec ATTRIBUTE_UNUSED, |
4332 | | bool newdef ATTRIBUTE_UNUSED, |
4333 | | bool olddef ATTRIBUTE_UNUSED, |
4334 | | bfd *oldbfd ATTRIBUTE_UNUSED, |
4335 | | const asection *oldsec ATTRIBUTE_UNUSED) |
4336 | 0 | { |
4337 | 0 | ppc_elf_hash_entry (h)->fake = 0; |
4338 | 0 | if ((STO_PPC64_LOCAL_MASK & isym->st_other) != 0) |
4339 | 0 | ppc_elf_hash_entry (h)->non_zero_localentry = 1; |
4340 | 0 | return true; |
4341 | 0 | } |
4342 | | |
4343 | | /* This function makes an old ABI object reference to ".bar" cause the |
4344 | | inclusion of a new ABI object archive that defines "bar". |
4345 | | NAME is a symbol defined in an archive. Return a symbol in the hash |
4346 | | table that might be satisfied by the archive symbols. */ |
4347 | | |
4348 | | static struct bfd_link_hash_entry * |
4349 | | ppc64_elf_archive_symbol_lookup (bfd *abfd, |
4350 | | struct bfd_link_info *info, |
4351 | | const char *name) |
4352 | 0 | { |
4353 | 0 | struct bfd_link_hash_entry *h; |
4354 | 0 | char *dot_name; |
4355 | 0 | size_t len; |
4356 | |
|
4357 | 0 | h = _bfd_elf_archive_symbol_lookup (abfd, info, name); |
4358 | 0 | if (h != NULL |
4359 | 0 | && ppc_hash_table (info) != NULL |
4360 | | /* Don't return this sym if it is a fake function descriptor |
4361 | | created by add_symbol_adjust. */ |
4362 | 0 | && !((struct ppc_link_hash_entry *) h)->fake) |
4363 | 0 | return h; |
4364 | | |
4365 | 0 | if (name[0] == '.') |
4366 | 0 | return h; |
4367 | | |
4368 | 0 | len = strlen (name); |
4369 | 0 | dot_name = bfd_alloc (abfd, len + 2); |
4370 | 0 | if (dot_name == NULL) |
4371 | 0 | return (struct bfd_link_hash_entry *) -1; |
4372 | 0 | dot_name[0] = '.'; |
4373 | 0 | memcpy (dot_name + 1, name, len + 1); |
4374 | 0 | h = _bfd_elf_archive_symbol_lookup (abfd, info, dot_name); |
4375 | 0 | bfd_release (abfd, dot_name); |
4376 | 0 | if (h != NULL) |
4377 | 0 | return h; |
4378 | | |
4379 | 0 | if (strcmp (name, "__tls_get_addr_opt") == 0) |
4380 | 0 | h = _bfd_elf_archive_symbol_lookup (abfd, info, "__tls_get_addr_desc"); |
4381 | 0 | return h; |
4382 | 0 | } |
4383 | | |
4384 | | /* This function satisfies all old ABI object references to ".bar" if a |
4385 | | new ABI object defines "bar". Well, at least, undefined dot symbols |
4386 | | are made weak. This stops later archive searches from including an |
4387 | | object if we already have a function descriptor definition. It also |
4388 | | prevents the linker complaining about undefined symbols. |
4389 | | We also check and correct mismatched symbol visibility here. The |
4390 | | most restrictive visibility of the function descriptor and the |
4391 | | function entry symbol is used. */ |
4392 | | |
4393 | | static bool |
4394 | | add_symbol_adjust (struct ppc_link_hash_entry *eh, struct bfd_link_info *info) |
4395 | 0 | { |
4396 | 0 | struct ppc_link_hash_table *htab; |
4397 | 0 | struct ppc_link_hash_entry *fdh; |
4398 | |
|
4399 | 0 | if (eh->elf.root.type == bfd_link_hash_warning) |
4400 | 0 | eh = (struct ppc_link_hash_entry *) eh->elf.root.u.i.link; |
4401 | |
|
4402 | 0 | if (eh->elf.root.type == bfd_link_hash_indirect) |
4403 | 0 | return true; |
4404 | | |
4405 | 0 | if (eh->elf.root.root.string[0] != '.') |
4406 | 0 | abort (); |
4407 | | |
4408 | 0 | htab = ppc_hash_table (info); |
4409 | 0 | if (htab == NULL) |
4410 | 0 | return false; |
4411 | | |
4412 | 0 | fdh = lookup_fdh (eh, htab); |
4413 | 0 | if (fdh == NULL |
4414 | 0 | && !bfd_link_relocatable (info) |
4415 | 0 | && (eh->elf.root.type == bfd_link_hash_undefined |
4416 | 0 | || eh->elf.root.type == bfd_link_hash_undefweak) |
4417 | 0 | && eh->elf.ref_regular) |
4418 | 0 | { |
4419 | | /* Make an undefined function descriptor sym, in order to |
4420 | | pull in an --as-needed shared lib. Archives are handled |
4421 | | elsewhere. */ |
4422 | 0 | fdh = make_fdh (info, eh); |
4423 | 0 | if (fdh == NULL) |
4424 | 0 | return false; |
4425 | 0 | } |
4426 | | |
4427 | 0 | if (fdh != NULL) |
4428 | 0 | { |
4429 | 0 | unsigned entry_vis = ELF_ST_VISIBILITY (eh->elf.other) - 1; |
4430 | 0 | unsigned descr_vis = ELF_ST_VISIBILITY (fdh->elf.other) - 1; |
4431 | | |
4432 | | /* Make both descriptor and entry symbol have the most |
4433 | | constraining visibility of either symbol. */ |
4434 | 0 | if (entry_vis < descr_vis) |
4435 | 0 | fdh->elf.other += entry_vis - descr_vis; |
4436 | 0 | else if (entry_vis > descr_vis) |
4437 | 0 | eh->elf.other += descr_vis - entry_vis; |
4438 | | |
4439 | | /* Propagate reference flags from entry symbol to function |
4440 | | descriptor symbol. */ |
4441 | 0 | fdh->elf.root.non_ir_ref_regular |= eh->elf.root.non_ir_ref_regular; |
4442 | 0 | fdh->elf.root.non_ir_ref_dynamic |= eh->elf.root.non_ir_ref_dynamic; |
4443 | 0 | fdh->elf.ref_regular |= eh->elf.ref_regular; |
4444 | 0 | fdh->elf.ref_regular_nonweak |= eh->elf.ref_regular_nonweak; |
4445 | |
|
4446 | 0 | if (!fdh->elf.forced_local |
4447 | 0 | && fdh->elf.dynindx == -1 |
4448 | 0 | && fdh->elf.versioned != versioned_hidden |
4449 | 0 | && (bfd_link_dll (info) |
4450 | 0 | || fdh->elf.def_dynamic |
4451 | 0 | || fdh->elf.ref_dynamic) |
4452 | 0 | && (eh->elf.ref_regular |
4453 | 0 | || eh->elf.def_regular)) |
4454 | 0 | { |
4455 | 0 | if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) |
4456 | 0 | return false; |
4457 | 0 | } |
4458 | 0 | } |
4459 | | |
4460 | 0 | return true; |
4461 | 0 | } |
4462 | | |
4463 | | /* Set up opd section info and abiversion for IBFD, and process list |
4464 | | of dot-symbols we made in link_hash_newfunc. */ |
4465 | | |
4466 | | static bool |
4467 | | ppc64_elf_before_check_relocs (bfd *ibfd, struct bfd_link_info *info) |
4468 | 0 | { |
4469 | 0 | struct ppc_link_hash_table *htab; |
4470 | 0 | struct ppc_link_hash_entry **p, *eh; |
4471 | 0 | asection *opd = bfd_get_section_by_name (ibfd, ".opd"); |
4472 | |
|
4473 | 0 | if (opd != NULL && opd->size != 0) |
4474 | 0 | { |
4475 | 0 | if (ppc64_elf_section_data (opd)->sec_type == sec_normal) |
4476 | 0 | ppc64_elf_section_data (opd)->sec_type = sec_opd; |
4477 | 0 | else if (ppc64_elf_section_data (opd)->sec_type != sec_opd) |
4478 | 0 | BFD_FAIL (); |
4479 | |
|
4480 | 0 | if (abiversion (ibfd) == 0) |
4481 | 0 | set_abiversion (ibfd, 1); |
4482 | 0 | else if (abiversion (ibfd) >= 2) |
4483 | 0 | { |
4484 | | /* xgettext:c-format */ |
4485 | 0 | _bfd_error_handler (_("%pB .opd not allowed in ABI version %d"), |
4486 | 0 | ibfd, abiversion (ibfd)); |
4487 | 0 | bfd_set_error (bfd_error_bad_value); |
4488 | 0 | return false; |
4489 | 0 | } |
4490 | 0 | } |
4491 | | |
4492 | 0 | if (is_ppc64_elf (info->output_bfd)) |
4493 | 0 | { |
4494 | | /* For input files without an explicit abiversion in e_flags |
4495 | | we should have flagged any with symbol st_other bits set |
4496 | | as ELFv2 and above flagged those with .opd as ELFv1. |
4497 | | Set the output abiversion if not yet set, and for any input |
4498 | | still ambiguous, take its abiversion from the output. |
4499 | | Differences in ABI are reported later. */ |
4500 | 0 | if (abiversion (info->output_bfd) == 0) |
4501 | 0 | set_abiversion (info->output_bfd, abiversion (ibfd)); |
4502 | 0 | else if (abiversion (ibfd) == 0) |
4503 | 0 | set_abiversion (ibfd, abiversion (info->output_bfd)); |
4504 | 0 | } |
4505 | |
|
4506 | 0 | htab = ppc_hash_table (info); |
4507 | 0 | if (htab == NULL) |
4508 | 0 | return true; |
4509 | | |
4510 | 0 | if (opd != NULL && opd->size != 0 |
4511 | 0 | && (ibfd->flags & DYNAMIC) == 0 |
4512 | 0 | && (opd->flags & SEC_RELOC) != 0 |
4513 | 0 | && opd->reloc_count != 0 |
4514 | 0 | && !bfd_is_abs_section (opd->output_section) |
4515 | 0 | && info->gc_sections) |
4516 | 0 | { |
4517 | | /* Garbage collection needs some extra help with .opd sections. |
4518 | | We don't want to necessarily keep everything referenced by |
4519 | | relocs in .opd, as that would keep all functions. Instead, |
4520 | | if we reference an .opd symbol (a function descriptor), we |
4521 | | want to keep the function code symbol's section. This is |
4522 | | easy for global symbols, but for local syms we need to keep |
4523 | | information about the associated function section. */ |
4524 | 0 | bfd_size_type amt; |
4525 | 0 | asection **opd_sym_map; |
4526 | 0 | Elf_Internal_Shdr *symtab_hdr; |
4527 | 0 | Elf_Internal_Rela *relocs, *rel_end, *rel; |
4528 | |
|
4529 | 0 | amt = OPD_NDX (opd->size) * sizeof (*opd_sym_map); |
4530 | 0 | opd_sym_map = bfd_zalloc (ibfd, amt); |
4531 | 0 | if (opd_sym_map == NULL) |
4532 | 0 | return false; |
4533 | 0 | ppc64_elf_section_data (opd)->u.opd.func_sec = opd_sym_map; |
4534 | 0 | relocs = _bfd_elf_link_read_relocs (ibfd, opd, NULL, NULL, |
4535 | 0 | info->keep_memory); |
4536 | 0 | if (relocs == NULL) |
4537 | 0 | return false; |
4538 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
4539 | 0 | rel_end = relocs + opd->reloc_count - 1; |
4540 | 0 | for (rel = relocs; rel < rel_end; rel++) |
4541 | 0 | { |
4542 | 0 | enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); |
4543 | 0 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
4544 | |
|
4545 | 0 | if (r_type == R_PPC64_ADDR64 |
4546 | 0 | && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC |
4547 | 0 | && r_symndx < symtab_hdr->sh_info) |
4548 | 0 | { |
4549 | 0 | Elf_Internal_Sym *isym; |
4550 | 0 | asection *s; |
4551 | |
|
4552 | 0 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, ibfd, |
4553 | 0 | r_symndx); |
4554 | 0 | if (isym == NULL) |
4555 | 0 | { |
4556 | 0 | if (elf_section_data (opd)->relocs != relocs) |
4557 | 0 | free (relocs); |
4558 | 0 | return false; |
4559 | 0 | } |
4560 | | |
4561 | 0 | s = bfd_section_from_elf_index (ibfd, isym->st_shndx); |
4562 | 0 | if (s != NULL && s != opd) |
4563 | 0 | opd_sym_map[OPD_NDX (rel->r_offset)] = s; |
4564 | 0 | } |
4565 | 0 | } |
4566 | 0 | if (elf_section_data (opd)->relocs != relocs) |
4567 | 0 | free (relocs); |
4568 | 0 | } |
4569 | | |
4570 | 0 | p = &htab->dot_syms; |
4571 | 0 | while ((eh = *p) != NULL) |
4572 | 0 | { |
4573 | 0 | *p = NULL; |
4574 | 0 | if (&eh->elf == htab->elf.hgot) |
4575 | 0 | ; |
4576 | 0 | else if (htab->elf.hgot == NULL |
4577 | 0 | && strcmp (eh->elf.root.root.string, ".TOC.") == 0) |
4578 | 0 | htab->elf.hgot = &eh->elf; |
4579 | 0 | else if (abiversion (ibfd) <= 1) |
4580 | 0 | { |
4581 | 0 | htab->need_func_desc_adj = 1; |
4582 | 0 | if (!add_symbol_adjust (eh, info)) |
4583 | 0 | return false; |
4584 | 0 | } |
4585 | 0 | p = &eh->u.next_dot_sym; |
4586 | 0 | } |
4587 | 0 | return true; |
4588 | 0 | } |
4589 | | |
4590 | | /* Undo hash table changes when an --as-needed input file is determined |
4591 | | not to be needed. */ |
4592 | | |
4593 | | static bool |
4594 | | ppc64_elf_notice_as_needed (bfd *ibfd, |
4595 | | struct bfd_link_info *info, |
4596 | | enum notice_asneeded_action act) |
4597 | 0 | { |
4598 | 0 | if (act == notice_not_needed) |
4599 | 0 | { |
4600 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
4601 | |
|
4602 | 0 | if (htab == NULL) |
4603 | 0 | return false; |
4604 | | |
4605 | 0 | htab->dot_syms = NULL; |
4606 | 0 | } |
4607 | 0 | return _bfd_elf_notice_as_needed (ibfd, info, act); |
4608 | 0 | } |
4609 | | |
4610 | | /* If --just-symbols against a final linked binary, then assume we need |
4611 | | toc adjusting stubs when calling functions defined there. */ |
4612 | | |
4613 | | static void |
4614 | | ppc64_elf_link_just_syms (asection *sec, struct bfd_link_info *info) |
4615 | 0 | { |
4616 | 0 | if ((sec->flags & SEC_CODE) != 0 |
4617 | 0 | && (sec->owner->flags & (EXEC_P | DYNAMIC)) != 0 |
4618 | 0 | && is_ppc64_elf (sec->owner)) |
4619 | 0 | { |
4620 | 0 | if (abiversion (sec->owner) >= 2 |
4621 | 0 | || bfd_get_section_by_name (sec->owner, ".opd") != NULL) |
4622 | 0 | sec->has_toc_reloc = 1; |
4623 | 0 | } |
4624 | 0 | _bfd_elf_link_just_syms (sec, info); |
4625 | 0 | } |
4626 | | |
4627 | | static struct plt_entry ** |
4628 | | update_local_sym_info (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, |
4629 | | unsigned long r_symndx, bfd_vma r_addend, int tls_type) |
4630 | 0 | { |
4631 | 0 | struct got_entry **local_got_ents = elf_local_got_ents (abfd); |
4632 | 0 | struct plt_entry **local_plt; |
4633 | 0 | unsigned char *local_got_tls_masks; |
4634 | |
|
4635 | 0 | if (local_got_ents == NULL) |
4636 | 0 | { |
4637 | 0 | bfd_size_type size = symtab_hdr->sh_info; |
4638 | |
|
4639 | 0 | size *= (sizeof (*local_got_ents) |
4640 | 0 | + sizeof (*local_plt) |
4641 | 0 | + sizeof (*local_got_tls_masks)); |
4642 | 0 | local_got_ents = bfd_zalloc (abfd, size); |
4643 | 0 | if (local_got_ents == NULL) |
4644 | 0 | return NULL; |
4645 | 0 | elf_local_got_ents (abfd) = local_got_ents; |
4646 | 0 | } |
4647 | | |
4648 | 0 | if ((tls_type & (NON_GOT | TLS_EXPLICIT)) == 0) |
4649 | 0 | { |
4650 | 0 | struct got_entry *ent; |
4651 | |
|
4652 | 0 | for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) |
4653 | 0 | if (ent->addend == r_addend |
4654 | 0 | && ent->owner == abfd |
4655 | 0 | && ent->tls_type == tls_type) |
4656 | 0 | break; |
4657 | 0 | if (ent == NULL) |
4658 | 0 | { |
4659 | 0 | size_t amt = sizeof (*ent); |
4660 | 0 | ent = bfd_alloc (abfd, amt); |
4661 | 0 | if (ent == NULL) |
4662 | 0 | return NULL; |
4663 | 0 | ent->next = local_got_ents[r_symndx]; |
4664 | 0 | ent->addend = r_addend; |
4665 | 0 | ent->owner = abfd; |
4666 | 0 | ent->tls_type = tls_type; |
4667 | 0 | ent->is_indirect = false; |
4668 | 0 | ent->got.refcount = 0; |
4669 | 0 | local_got_ents[r_symndx] = ent; |
4670 | 0 | } |
4671 | 0 | ent->got.refcount += 1; |
4672 | 0 | } |
4673 | | |
4674 | 0 | local_plt = (struct plt_entry **) (local_got_ents + symtab_hdr->sh_info); |
4675 | 0 | local_got_tls_masks = (unsigned char *) (local_plt + symtab_hdr->sh_info); |
4676 | 0 | local_got_tls_masks[r_symndx] |= tls_type & 0xff; |
4677 | |
|
4678 | 0 | return local_plt + r_symndx; |
4679 | 0 | } |
4680 | | |
4681 | | static bool |
4682 | | update_plt_info (bfd *abfd, struct plt_entry **plist, bfd_vma addend) |
4683 | 0 | { |
4684 | 0 | struct plt_entry *ent; |
4685 | |
|
4686 | 0 | for (ent = *plist; ent != NULL; ent = ent->next) |
4687 | 0 | if (ent->addend == addend) |
4688 | 0 | break; |
4689 | 0 | if (ent == NULL) |
4690 | 0 | { |
4691 | 0 | size_t amt = sizeof (*ent); |
4692 | 0 | ent = bfd_alloc (abfd, amt); |
4693 | 0 | if (ent == NULL) |
4694 | 0 | return false; |
4695 | 0 | ent->next = *plist; |
4696 | 0 | ent->addend = addend; |
4697 | 0 | ent->plt.refcount = 0; |
4698 | 0 | *plist = ent; |
4699 | 0 | } |
4700 | 0 | ent->plt.refcount += 1; |
4701 | 0 | return true; |
4702 | 0 | } |
4703 | | |
4704 | | static bool |
4705 | | is_branch_reloc (enum elf_ppc64_reloc_type r_type) |
4706 | 0 | { |
4707 | 0 | return (r_type == R_PPC64_REL24 |
4708 | 0 | || r_type == R_PPC64_REL24_NOTOC |
4709 | 0 | || r_type == R_PPC64_REL24_P9NOTOC |
4710 | 0 | || r_type == R_PPC64_REL14 |
4711 | 0 | || r_type == R_PPC64_REL14_BRTAKEN |
4712 | 0 | || r_type == R_PPC64_REL14_BRNTAKEN |
4713 | 0 | || r_type == R_PPC64_ADDR24 |
4714 | 0 | || r_type == R_PPC64_ADDR14 |
4715 | 0 | || r_type == R_PPC64_ADDR14_BRTAKEN |
4716 | 0 | || r_type == R_PPC64_ADDR14_BRNTAKEN |
4717 | 0 | || r_type == R_PPC64_PLTCALL |
4718 | 0 | || r_type == R_PPC64_PLTCALL_NOTOC); |
4719 | 0 | } |
4720 | | |
4721 | | /* Relocs on inline plt call sequence insns prior to the call. */ |
4722 | | |
4723 | | static bool |
4724 | | is_plt_seq_reloc (enum elf_ppc64_reloc_type r_type) |
4725 | 0 | { |
4726 | 0 | return (r_type == R_PPC64_PLT16_HA |
4727 | 0 | || r_type == R_PPC64_PLT16_HI |
4728 | 0 | || r_type == R_PPC64_PLT16_LO |
4729 | 0 | || r_type == R_PPC64_PLT16_LO_DS |
4730 | 0 | || r_type == R_PPC64_PLT_PCREL34 |
4731 | 0 | || r_type == R_PPC64_PLT_PCREL34_NOTOC |
4732 | 0 | || r_type == R_PPC64_PLTSEQ |
4733 | 0 | || r_type == R_PPC64_PLTSEQ_NOTOC); |
4734 | 0 | } |
4735 | | |
4736 | | /* Of relocs which might appear paired with TLSGD and TLSLD marker |
4737 | | relocs, return true for those that operate on a dword. */ |
4738 | | |
4739 | | static bool |
4740 | | is_8byte_reloc (enum elf_ppc64_reloc_type r_type) |
4741 | 0 | { |
4742 | 0 | return (r_type == R_PPC64_PLT_PCREL34 |
4743 | 0 | || r_type == R_PPC64_PLT_PCREL34_NOTOC |
4744 | 0 | || r_type == R_PPC64_PLTCALL); |
4745 | 0 | } |
4746 | | |
4747 | | /* The RELR encoding doesn't allow odd addresses, so RELR_ALIGN must |
4748 | | be at least 1. R_PPC64_RELATIVE relocs require alignment of 2**3. |
4749 | | We use 3 here to avoid complexity in relocate_section, where for a |
4750 | | value of 1 we'd need to test for not just an output RELATIVE reloc |
4751 | | near the call to maybe_relr but also UADDR64 and some conditions on |
4752 | | the symbol. See PR30824. */ |
4753 | 0 | #define RELR_ALIGN 3 |
4754 | | |
4755 | | static bool |
4756 | | maybe_relr (enum elf_ppc64_reloc_type r_type, |
4757 | | const Elf_Internal_Rela *rel, |
4758 | | const asection *sec) |
4759 | 0 | { |
4760 | 0 | return ((r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
4761 | 0 | && (rel->r_offset & ((1 << RELR_ALIGN) - 1)) == 0 |
4762 | 0 | && sec->alignment_power >= RELR_ALIGN); |
4763 | 0 | } |
4764 | | |
4765 | | /* Like bfd_reloc_offset_in_range but without a howto. Return true |
4766 | | iff a field of SIZE bytes at OFFSET is within SEC limits. */ |
4767 | | |
4768 | | static bool |
4769 | | offset_in_range (asection *sec, bfd_vma offset, size_t size) |
4770 | 0 | { |
4771 | 0 | return offset <= sec->size && size <= sec->size - offset; |
4772 | 0 | } |
4773 | | |
4774 | | /* Look through the relocs for a section during the first phase, and |
4775 | | calculate needed space in the global offset table, procedure |
4776 | | linkage table, and dynamic reloc sections. */ |
4777 | | |
4778 | | static bool |
4779 | | ppc64_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
4780 | | asection *sec, const Elf_Internal_Rela *relocs) |
4781 | 0 | { |
4782 | 0 | struct ppc_link_hash_table *htab; |
4783 | 0 | Elf_Internal_Shdr *symtab_hdr; |
4784 | 0 | struct elf_link_hash_entry **sym_hashes; |
4785 | 0 | const Elf_Internal_Rela *rel; |
4786 | 0 | const Elf_Internal_Rela *rel_end; |
4787 | 0 | asection *sreloc; |
4788 | 0 | struct elf_link_hash_entry *tga, *dottga; |
4789 | 0 | bool is_opd; |
4790 | |
|
4791 | 0 | if (bfd_link_relocatable (info)) |
4792 | 0 | return true; |
4793 | | |
4794 | 0 | BFD_ASSERT (is_ppc64_elf (abfd)); |
4795 | |
|
4796 | 0 | htab = ppc_hash_table (info); |
4797 | 0 | if (htab == NULL) |
4798 | 0 | return false; |
4799 | | |
4800 | 0 | tga = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
4801 | 0 | false, false, true); |
4802 | 0 | dottga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", |
4803 | 0 | false, false, true); |
4804 | 0 | symtab_hdr = &elf_symtab_hdr (abfd); |
4805 | 0 | sym_hashes = elf_sym_hashes (abfd); |
4806 | 0 | sreloc = NULL; |
4807 | 0 | is_opd = ppc64_elf_section_data (sec)->sec_type == sec_opd; |
4808 | 0 | rel_end = relocs + sec->reloc_count; |
4809 | 0 | for (rel = relocs; rel < rel_end; rel++) |
4810 | 0 | { |
4811 | 0 | unsigned long r_symndx; |
4812 | 0 | struct elf_link_hash_entry *h; |
4813 | 0 | Elf_Internal_Sym *isym; |
4814 | 0 | enum elf_ppc64_reloc_type r_type; |
4815 | 0 | int tls_type; |
4816 | 0 | struct _ppc64_elf_section_data *ppc64_sec; |
4817 | 0 | struct plt_entry **ifunc, **plt_list; |
4818 | |
|
4819 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
4820 | 0 | if (r_symndx < symtab_hdr->sh_info) |
4821 | 0 | { |
4822 | 0 | h = NULL; |
4823 | 0 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, r_symndx); |
4824 | 0 | if (isym == NULL) |
4825 | 0 | return false; |
4826 | 0 | } |
4827 | 0 | else |
4828 | 0 | { |
4829 | 0 | isym = NULL; |
4830 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
4831 | 0 | h = elf_follow_link (h); |
4832 | |
|
4833 | 0 | if (h == htab->elf.hgot) |
4834 | 0 | sec->has_toc_reloc = 1; |
4835 | 0 | } |
4836 | | |
4837 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
4838 | 0 | switch (r_type) |
4839 | 0 | { |
4840 | 0 | case R_PPC64_D34: |
4841 | 0 | case R_PPC64_D34_LO: |
4842 | 0 | case R_PPC64_D34_HI30: |
4843 | 0 | case R_PPC64_D34_HA30: |
4844 | 0 | case R_PPC64_D28: |
4845 | 0 | case R_PPC64_TPREL34: |
4846 | 0 | case R_PPC64_DTPREL34: |
4847 | 0 | case R_PPC64_PCREL34: |
4848 | 0 | case R_PPC64_GOT_PCREL34: |
4849 | 0 | case R_PPC64_GOT_TLSGD_PCREL34: |
4850 | 0 | case R_PPC64_GOT_TLSLD_PCREL34: |
4851 | 0 | case R_PPC64_GOT_TPREL_PCREL34: |
4852 | 0 | case R_PPC64_GOT_DTPREL_PCREL34: |
4853 | 0 | case R_PPC64_PLT_PCREL34: |
4854 | 0 | case R_PPC64_PLT_PCREL34_NOTOC: |
4855 | 0 | case R_PPC64_PCREL28: |
4856 | 0 | htab->has_power10_relocs = 1; |
4857 | 0 | break; |
4858 | 0 | default: |
4859 | 0 | break; |
4860 | 0 | } |
4861 | | |
4862 | 0 | switch (r_type) |
4863 | 0 | { |
4864 | 0 | case R_PPC64_PLT16_HA: |
4865 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
4866 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
4867 | 0 | case R_PPC64_GOT_TPREL16_HA: |
4868 | 0 | case R_PPC64_GOT_DTPREL16_HA: |
4869 | 0 | case R_PPC64_GOT16_HA: |
4870 | 0 | case R_PPC64_TOC16_HA: |
4871 | 0 | case R_PPC64_PLT16_LO: |
4872 | 0 | case R_PPC64_PLT16_LO_DS: |
4873 | 0 | case R_PPC64_GOT_TLSLD16_LO: |
4874 | 0 | case R_PPC64_GOT_TLSGD16_LO: |
4875 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
4876 | 0 | case R_PPC64_GOT_DTPREL16_LO_DS: |
4877 | 0 | case R_PPC64_GOT16_LO: |
4878 | 0 | case R_PPC64_GOT16_LO_DS: |
4879 | 0 | case R_PPC64_TOC16_LO: |
4880 | 0 | case R_PPC64_TOC16_LO_DS: |
4881 | 0 | case R_PPC64_GOT_PCREL34: |
4882 | 0 | ppc64_elf_tdata (abfd)->has_optrel = 1; |
4883 | 0 | ppc64_elf_section_data (sec)->has_optrel = 1; |
4884 | 0 | break; |
4885 | 0 | default: |
4886 | 0 | break; |
4887 | 0 | } |
4888 | | |
4889 | 0 | ifunc = NULL; |
4890 | 0 | if (h != NULL) |
4891 | 0 | { |
4892 | 0 | if (h->type == STT_GNU_IFUNC) |
4893 | 0 | { |
4894 | 0 | h->needs_plt = 1; |
4895 | 0 | ifunc = &h->plt.plist; |
4896 | 0 | } |
4897 | 0 | } |
4898 | 0 | else |
4899 | 0 | { |
4900 | 0 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
4901 | 0 | { |
4902 | 0 | ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
4903 | 0 | rel->r_addend, |
4904 | 0 | NON_GOT | PLT_IFUNC); |
4905 | 0 | if (ifunc == NULL) |
4906 | 0 | return false; |
4907 | 0 | } |
4908 | 0 | } |
4909 | | |
4910 | 0 | tls_type = 0; |
4911 | 0 | switch (r_type) |
4912 | 0 | { |
4913 | 0 | case R_PPC64_PLTSEQ: |
4914 | 0 | case R_PPC64_PLTSEQ_NOTOC: |
4915 | | /* Inline plt call code emitted by gcc doesn't support |
4916 | | modifying the tls_index words to short-circuit |
4917 | | __tls_get_addr calls. See PR32387. */ |
4918 | 0 | if (h != NULL && (h == tga || h == dottga)) |
4919 | 0 | htab->params->tls_get_addr_opt = 0; |
4920 | 0 | break; |
4921 | | |
4922 | 0 | case R_PPC64_TLSGD: |
4923 | 0 | case R_PPC64_TLSLD: |
4924 | | /* These special tls relocs tie a call to __tls_get_addr with |
4925 | | its parameter symbol. */ |
4926 | 0 | if (h != NULL) |
4927 | 0 | ppc_elf_hash_entry (h)->tls_mask |= TLS_TLS | TLS_MARK; |
4928 | 0 | else |
4929 | 0 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
4930 | 0 | rel->r_addend, |
4931 | 0 | NON_GOT | TLS_TLS | TLS_MARK)) |
4932 | 0 | return false; |
4933 | 0 | sec->has_tls_reloc = 1; |
4934 | 0 | break; |
4935 | | |
4936 | 0 | case R_PPC64_GOT_TLSLD16: |
4937 | 0 | case R_PPC64_GOT_TLSLD16_LO: |
4938 | 0 | case R_PPC64_GOT_TLSLD16_HI: |
4939 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
4940 | 0 | case R_PPC64_GOT_TLSLD_PCREL34: |
4941 | 0 | tls_type = TLS_TLS | TLS_LD; |
4942 | 0 | goto dogottls; |
4943 | | |
4944 | 0 | case R_PPC64_GOT_TLSGD16: |
4945 | 0 | case R_PPC64_GOT_TLSGD16_LO: |
4946 | 0 | case R_PPC64_GOT_TLSGD16_HI: |
4947 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
4948 | 0 | case R_PPC64_GOT_TLSGD_PCREL34: |
4949 | 0 | tls_type = TLS_TLS | TLS_GD; |
4950 | 0 | goto dogottls; |
4951 | | |
4952 | 0 | case R_PPC64_GOT_TPREL16_DS: |
4953 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
4954 | 0 | case R_PPC64_GOT_TPREL16_HI: |
4955 | 0 | case R_PPC64_GOT_TPREL16_HA: |
4956 | 0 | case R_PPC64_GOT_TPREL_PCREL34: |
4957 | 0 | if (bfd_link_dll (info)) |
4958 | 0 | info->flags |= DF_STATIC_TLS; |
4959 | 0 | tls_type = TLS_TLS | TLS_TPREL; |
4960 | 0 | goto dogottls; |
4961 | | |
4962 | 0 | case R_PPC64_GOT_DTPREL16_DS: |
4963 | 0 | case R_PPC64_GOT_DTPREL16_LO_DS: |
4964 | 0 | case R_PPC64_GOT_DTPREL16_HI: |
4965 | 0 | case R_PPC64_GOT_DTPREL16_HA: |
4966 | 0 | case R_PPC64_GOT_DTPREL_PCREL34: |
4967 | 0 | tls_type = TLS_TLS | TLS_DTPREL; |
4968 | 0 | dogottls: |
4969 | 0 | sec->has_tls_reloc = 1; |
4970 | 0 | goto dogot; |
4971 | | |
4972 | 0 | case R_PPC64_GOT16: |
4973 | 0 | case R_PPC64_GOT16_LO: |
4974 | 0 | case R_PPC64_GOT16_HI: |
4975 | 0 | case R_PPC64_GOT16_HA: |
4976 | 0 | case R_PPC64_GOT16_DS: |
4977 | 0 | case R_PPC64_GOT16_LO_DS: |
4978 | 0 | case R_PPC64_GOT_PCREL34: |
4979 | 0 | dogot: |
4980 | | /* This symbol requires a global offset table entry. */ |
4981 | 0 | sec->has_toc_reloc = 1; |
4982 | 0 | if (r_type == R_PPC64_GOT_TLSLD16 |
4983 | 0 | || r_type == R_PPC64_GOT_TLSGD16 |
4984 | 0 | || r_type == R_PPC64_GOT_TPREL16_DS |
4985 | 0 | || r_type == R_PPC64_GOT_DTPREL16_DS |
4986 | 0 | || r_type == R_PPC64_GOT16 |
4987 | 0 | || r_type == R_PPC64_GOT16_DS) |
4988 | 0 | { |
4989 | 0 | htab->do_multi_toc = 1; |
4990 | 0 | ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; |
4991 | 0 | } |
4992 | |
|
4993 | 0 | if (ppc64_elf_tdata (abfd)->got == NULL |
4994 | 0 | && !create_got_section (abfd, info)) |
4995 | 0 | return false; |
4996 | | |
4997 | 0 | if (h != NULL) |
4998 | 0 | { |
4999 | 0 | struct ppc_link_hash_entry *eh; |
5000 | 0 | struct got_entry *ent; |
5001 | |
|
5002 | 0 | eh = ppc_elf_hash_entry (h); |
5003 | 0 | for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) |
5004 | 0 | if (ent->addend == rel->r_addend |
5005 | 0 | && ent->owner == abfd |
5006 | 0 | && ent->tls_type == tls_type) |
5007 | 0 | break; |
5008 | 0 | if (ent == NULL) |
5009 | 0 | { |
5010 | 0 | size_t amt = sizeof (*ent); |
5011 | 0 | ent = bfd_alloc (abfd, amt); |
5012 | 0 | if (ent == NULL) |
5013 | 0 | return false; |
5014 | 0 | ent->next = eh->elf.got.glist; |
5015 | 0 | ent->addend = rel->r_addend; |
5016 | 0 | ent->owner = abfd; |
5017 | 0 | ent->tls_type = tls_type; |
5018 | 0 | ent->is_indirect = false; |
5019 | 0 | ent->got.refcount = 0; |
5020 | 0 | eh->elf.got.glist = ent; |
5021 | 0 | } |
5022 | 0 | ent->got.refcount += 1; |
5023 | 0 | eh->tls_mask |= tls_type; |
5024 | 0 | } |
5025 | 0 | else |
5026 | | /* This is a global offset table entry for a local symbol. */ |
5027 | 0 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
5028 | 0 | rel->r_addend, tls_type)) |
5029 | 0 | return false; |
5030 | 0 | break; |
5031 | | |
5032 | 0 | case R_PPC64_PLT16_HA: |
5033 | 0 | case R_PPC64_PLT16_HI: |
5034 | 0 | case R_PPC64_PLT16_LO: |
5035 | 0 | case R_PPC64_PLT16_LO_DS: |
5036 | 0 | case R_PPC64_PLT_PCREL34: |
5037 | 0 | case R_PPC64_PLT_PCREL34_NOTOC: |
5038 | 0 | case R_PPC64_PLT32: |
5039 | 0 | case R_PPC64_PLT64: |
5040 | | /* This symbol requires a procedure linkage table entry. */ |
5041 | 0 | plt_list = ifunc; |
5042 | 0 | if (h != NULL) |
5043 | 0 | { |
5044 | 0 | h->needs_plt = 1; |
5045 | 0 | if (h->root.root.string[0] == '.' |
5046 | 0 | && h->root.root.string[1] != '\0') |
5047 | 0 | ppc_elf_hash_entry (h)->is_func = 1; |
5048 | 0 | ppc_elf_hash_entry (h)->tls_mask |= PLT_KEEP; |
5049 | 0 | plt_list = &h->plt.plist; |
5050 | 0 | } |
5051 | 0 | if (plt_list == NULL) |
5052 | 0 | plt_list = update_local_sym_info (abfd, symtab_hdr, r_symndx, |
5053 | 0 | rel->r_addend, |
5054 | 0 | NON_GOT | PLT_KEEP); |
5055 | 0 | if (!update_plt_info (abfd, plt_list, rel->r_addend)) |
5056 | 0 | return false; |
5057 | 0 | break; |
5058 | | |
5059 | | /* The following relocations don't need to propagate the |
5060 | | relocation if linking a shared object since they are |
5061 | | section relative. */ |
5062 | 0 | case R_PPC64_SECTOFF: |
5063 | 0 | case R_PPC64_SECTOFF_LO: |
5064 | 0 | case R_PPC64_SECTOFF_HI: |
5065 | 0 | case R_PPC64_SECTOFF_HA: |
5066 | 0 | case R_PPC64_SECTOFF_DS: |
5067 | 0 | case R_PPC64_SECTOFF_LO_DS: |
5068 | 0 | case R_PPC64_DTPREL16: |
5069 | 0 | case R_PPC64_DTPREL16_LO: |
5070 | 0 | case R_PPC64_DTPREL16_HI: |
5071 | 0 | case R_PPC64_DTPREL16_HA: |
5072 | 0 | case R_PPC64_DTPREL16_DS: |
5073 | 0 | case R_PPC64_DTPREL16_LO_DS: |
5074 | 0 | case R_PPC64_DTPREL16_HIGH: |
5075 | 0 | case R_PPC64_DTPREL16_HIGHA: |
5076 | 0 | case R_PPC64_DTPREL16_HIGHER: |
5077 | 0 | case R_PPC64_DTPREL16_HIGHERA: |
5078 | 0 | case R_PPC64_DTPREL16_HIGHEST: |
5079 | 0 | case R_PPC64_DTPREL16_HIGHESTA: |
5080 | 0 | break; |
5081 | | |
5082 | | /* Nor do these. */ |
5083 | 0 | case R_PPC64_REL16: |
5084 | 0 | case R_PPC64_REL16_LO: |
5085 | 0 | case R_PPC64_REL16_HI: |
5086 | 0 | case R_PPC64_REL16_HA: |
5087 | 0 | case R_PPC64_REL16_HIGH: |
5088 | 0 | case R_PPC64_REL16_HIGHA: |
5089 | 0 | case R_PPC64_REL16_HIGHER: |
5090 | 0 | case R_PPC64_REL16_HIGHERA: |
5091 | 0 | case R_PPC64_REL16_HIGHEST: |
5092 | 0 | case R_PPC64_REL16_HIGHESTA: |
5093 | 0 | case R_PPC64_REL16_HIGHER34: |
5094 | 0 | case R_PPC64_REL16_HIGHERA34: |
5095 | 0 | case R_PPC64_REL16_HIGHEST34: |
5096 | 0 | case R_PPC64_REL16_HIGHESTA34: |
5097 | 0 | case R_PPC64_REL16DX_HA: |
5098 | 0 | break; |
5099 | | |
5100 | | /* Not supported as a dynamic relocation. */ |
5101 | 0 | case R_PPC64_ADDR64_LOCAL: |
5102 | 0 | if (bfd_link_pic (info)) |
5103 | 0 | { |
5104 | 0 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
5105 | 0 | ppc_howto_init (); |
5106 | | /* xgettext:c-format */ |
5107 | 0 | info->callbacks->einfo (_("%H: %s reloc unsupported " |
5108 | 0 | "in shared libraries and PIEs\n"), |
5109 | 0 | abfd, sec, rel->r_offset, |
5110 | 0 | ppc64_elf_howto_table[r_type]->name); |
5111 | 0 | bfd_set_error (bfd_error_bad_value); |
5112 | 0 | return false; |
5113 | 0 | } |
5114 | 0 | break; |
5115 | | |
5116 | 0 | case R_PPC64_TOC16: |
5117 | 0 | case R_PPC64_TOC16_DS: |
5118 | 0 | htab->do_multi_toc = 1; |
5119 | 0 | ppc64_elf_tdata (abfd)->has_small_toc_reloc = 1; |
5120 | | /* Fall through. */ |
5121 | 0 | case R_PPC64_TOC16_LO: |
5122 | 0 | case R_PPC64_TOC16_HI: |
5123 | 0 | case R_PPC64_TOC16_HA: |
5124 | 0 | case R_PPC64_TOC16_LO_DS: |
5125 | 0 | sec->has_toc_reloc = 1; |
5126 | 0 | if (h != NULL && bfd_link_executable (info)) |
5127 | 0 | { |
5128 | | /* We may need a copy reloc. */ |
5129 | 0 | h->non_got_ref = 1; |
5130 | | /* Strongly prefer a copy reloc over a dynamic reloc. |
5131 | | glibc ld.so as of 2019-08 will error out if one of |
5132 | | these relocations is emitted. */ |
5133 | 0 | h->needs_copy = 1; |
5134 | 0 | goto dodyn; |
5135 | 0 | } |
5136 | 0 | break; |
5137 | | |
5138 | | /* Marker reloc. */ |
5139 | 0 | case R_PPC64_ENTRY: |
5140 | 0 | break; |
5141 | | |
5142 | | /* This relocation describes the C++ object vtable hierarchy. |
5143 | | Reconstruct it for later use during GC. */ |
5144 | 0 | case R_PPC64_GNU_VTINHERIT: |
5145 | 0 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
5146 | 0 | return false; |
5147 | 0 | break; |
5148 | | |
5149 | | /* This relocation describes which C++ vtable entries are actually |
5150 | | used. Record for later use during GC. */ |
5151 | 0 | case R_PPC64_GNU_VTENTRY: |
5152 | 0 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
5153 | 0 | return false; |
5154 | 0 | break; |
5155 | | |
5156 | 0 | case R_PPC64_REL14: |
5157 | 0 | case R_PPC64_REL14_BRTAKEN: |
5158 | 0 | case R_PPC64_REL14_BRNTAKEN: |
5159 | 0 | { |
5160 | 0 | asection *dest = NULL; |
5161 | | |
5162 | | /* Heuristic: If jumping outside our section, chances are |
5163 | | we are going to need a stub. */ |
5164 | 0 | if (h != NULL) |
5165 | 0 | { |
5166 | | /* If the sym is weak it may be overridden later, so |
5167 | | don't assume we know where a weak sym lives. */ |
5168 | 0 | if (h->root.type == bfd_link_hash_defined) |
5169 | 0 | dest = h->root.u.def.section; |
5170 | 0 | } |
5171 | 0 | else |
5172 | 0 | dest = bfd_section_from_elf_index (abfd, isym->st_shndx); |
5173 | |
|
5174 | 0 | if (dest != sec) |
5175 | 0 | ppc64_elf_section_data (sec)->has_14bit_branch = 1; |
5176 | 0 | } |
5177 | 0 | goto rel24; |
5178 | | |
5179 | 0 | case R_PPC64_PLTCALL: |
5180 | 0 | case R_PPC64_PLTCALL_NOTOC: |
5181 | 0 | ppc64_elf_section_data (sec)->has_pltcall = 1; |
5182 | | /* Fall through. */ |
5183 | |
|
5184 | 0 | case R_PPC64_REL24: |
5185 | 0 | case R_PPC64_REL24_NOTOC: |
5186 | 0 | case R_PPC64_REL24_P9NOTOC: |
5187 | 0 | rel24: |
5188 | 0 | plt_list = ifunc; |
5189 | 0 | if (h != NULL) |
5190 | 0 | { |
5191 | 0 | h->needs_plt = 1; |
5192 | 0 | if (h->root.root.string[0] == '.' |
5193 | 0 | && h->root.root.string[1] != '\0') |
5194 | 0 | ppc_elf_hash_entry (h)->is_func = 1; |
5195 | |
|
5196 | 0 | if (h == tga || h == dottga) |
5197 | 0 | { |
5198 | 0 | sec->has_tls_reloc = 1; |
5199 | 0 | if (rel != relocs |
5200 | 0 | && (ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSGD |
5201 | 0 | || ELF64_R_TYPE (rel[-1].r_info) == R_PPC64_TLSLD)) |
5202 | | /* We have a new-style __tls_get_addr call with |
5203 | | a marker reloc. */ |
5204 | 0 | ; |
5205 | 0 | else |
5206 | | /* Mark this section as having an old-style call. */ |
5207 | 0 | sec->nomark_tls_get_addr = 1; |
5208 | 0 | } |
5209 | 0 | plt_list = &h->plt.plist; |
5210 | 0 | } |
5211 | | |
5212 | | /* We may need a .plt entry if the function this reloc |
5213 | | refers to is in a shared lib. */ |
5214 | 0 | if (plt_list |
5215 | 0 | && !update_plt_info (abfd, plt_list, rel->r_addend)) |
5216 | 0 | return false; |
5217 | 0 | break; |
5218 | | |
5219 | 0 | case R_PPC64_ADDR14: |
5220 | 0 | case R_PPC64_ADDR14_BRNTAKEN: |
5221 | 0 | case R_PPC64_ADDR14_BRTAKEN: |
5222 | 0 | case R_PPC64_ADDR24: |
5223 | 0 | goto dodyn; |
5224 | | |
5225 | 0 | case R_PPC64_TPREL64: |
5226 | 0 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; |
5227 | 0 | if (bfd_link_dll (info)) |
5228 | 0 | info->flags |= DF_STATIC_TLS; |
5229 | 0 | goto dotlstoc; |
5230 | | |
5231 | 0 | case R_PPC64_DTPMOD64: |
5232 | 0 | if (rel + 1 < rel_end |
5233 | 0 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
5234 | 0 | && rel[1].r_offset == rel->r_offset + 8) |
5235 | 0 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; |
5236 | 0 | else |
5237 | 0 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; |
5238 | 0 | goto dotlstoc; |
5239 | | |
5240 | 0 | case R_PPC64_DTPREL64: |
5241 | 0 | tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; |
5242 | 0 | if (rel != relocs |
5243 | 0 | && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) |
5244 | 0 | && rel[-1].r_offset == rel->r_offset - 8) |
5245 | | /* This is the second reloc of a dtpmod, dtprel pair. |
5246 | | Don't mark with TLS_DTPREL. */ |
5247 | 0 | goto dodyn; |
5248 | | |
5249 | 0 | dotlstoc: |
5250 | 0 | sec->has_tls_reloc = 1; |
5251 | 0 | if (h != NULL) |
5252 | 0 | ppc_elf_hash_entry (h)->tls_mask |= tls_type & 0xff; |
5253 | 0 | else |
5254 | 0 | if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
5255 | 0 | rel->r_addend, tls_type)) |
5256 | 0 | return false; |
5257 | | |
5258 | 0 | ppc64_sec = ppc64_elf_section_data (sec); |
5259 | 0 | if (ppc64_sec->sec_type == sec_normal) |
5260 | 0 | { |
5261 | 0 | bfd_size_type amt; |
5262 | | |
5263 | | /* One extra to simplify get_tls_mask. */ |
5264 | 0 | amt = sec->size * sizeof (unsigned) / 8 + sizeof (unsigned); |
5265 | 0 | ppc64_sec->u.toc.symndx = bfd_zalloc (abfd, amt); |
5266 | 0 | if (ppc64_sec->u.toc.symndx == NULL) |
5267 | 0 | return false; |
5268 | 0 | amt = sec->size * sizeof (bfd_vma) / 8; |
5269 | 0 | ppc64_sec->u.toc.add = bfd_zalloc (abfd, amt); |
5270 | 0 | if (ppc64_sec->u.toc.add == NULL) |
5271 | 0 | return false; |
5272 | 0 | ppc64_sec->sec_type = sec_toc; |
5273 | 0 | } |
5274 | 0 | if (ppc64_sec->sec_type != sec_toc |
5275 | 0 | || rel->r_offset % 8 != 0) |
5276 | 0 | { |
5277 | 0 | info->callbacks->einfo (_("%H: %s reloc unsupported here\n"), |
5278 | 0 | abfd, sec, rel->r_offset, |
5279 | 0 | ppc64_elf_howto_table[r_type]->name); |
5280 | 0 | bfd_set_error (bfd_error_bad_value); |
5281 | 0 | return false; |
5282 | 0 | } |
5283 | 0 | ppc64_sec->u.toc.symndx[rel->r_offset / 8] = r_symndx; |
5284 | 0 | ppc64_sec->u.toc.add[rel->r_offset / 8] = rel->r_addend; |
5285 | | |
5286 | | /* Mark the second slot of a GD or LD entry. |
5287 | | -1 to indicate GD and -2 to indicate LD. */ |
5288 | 0 | if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) |
5289 | 0 | ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -1; |
5290 | 0 | else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) |
5291 | 0 | ppc64_sec->u.toc.symndx[rel->r_offset / 8 + 1] = -2; |
5292 | 0 | goto dodyn; |
5293 | | |
5294 | 0 | case R_PPC64_TPREL16_HI: |
5295 | 0 | case R_PPC64_TPREL16_HA: |
5296 | 0 | case R_PPC64_TPREL16_HIGH: |
5297 | 0 | case R_PPC64_TPREL16_HIGHA: |
5298 | 0 | case R_PPC64_TPREL16_HIGHER: |
5299 | 0 | case R_PPC64_TPREL16_HIGHERA: |
5300 | 0 | case R_PPC64_TPREL16_HIGHEST: |
5301 | 0 | case R_PPC64_TPREL16_HIGHESTA: |
5302 | 0 | sec->has_tls_reloc = 1; |
5303 | | /* Fall through. */ |
5304 | 0 | case R_PPC64_TPREL34: |
5305 | 0 | case R_PPC64_TPREL16: |
5306 | 0 | case R_PPC64_TPREL16_DS: |
5307 | 0 | case R_PPC64_TPREL16_LO: |
5308 | 0 | case R_PPC64_TPREL16_LO_DS: |
5309 | 0 | if (bfd_link_dll (info)) |
5310 | 0 | info->flags |= DF_STATIC_TLS; |
5311 | 0 | goto dodyn; |
5312 | | |
5313 | 0 | case R_PPC64_ADDR64: |
5314 | 0 | if (is_opd |
5315 | 0 | && rel + 1 < rel_end |
5316 | 0 | && ELF64_R_TYPE ((rel + 1)->r_info) == R_PPC64_TOC) |
5317 | 0 | { |
5318 | 0 | if (h != NULL) |
5319 | 0 | ppc_elf_hash_entry (h)->is_func = 1; |
5320 | 0 | } |
5321 | | /* Fall through. */ |
5322 | |
|
5323 | 0 | case R_PPC64_ADDR16: |
5324 | 0 | case R_PPC64_ADDR16_DS: |
5325 | 0 | case R_PPC64_ADDR16_HA: |
5326 | 0 | case R_PPC64_ADDR16_HI: |
5327 | 0 | case R_PPC64_ADDR16_HIGH: |
5328 | 0 | case R_PPC64_ADDR16_HIGHA: |
5329 | 0 | case R_PPC64_ADDR16_HIGHER: |
5330 | 0 | case R_PPC64_ADDR16_HIGHERA: |
5331 | 0 | case R_PPC64_ADDR16_HIGHEST: |
5332 | 0 | case R_PPC64_ADDR16_HIGHESTA: |
5333 | 0 | case R_PPC64_ADDR16_LO: |
5334 | 0 | case R_PPC64_ADDR16_LO_DS: |
5335 | 0 | case R_PPC64_D34: |
5336 | 0 | case R_PPC64_D34_LO: |
5337 | 0 | case R_PPC64_D34_HI30: |
5338 | 0 | case R_PPC64_D34_HA30: |
5339 | 0 | case R_PPC64_ADDR16_HIGHER34: |
5340 | 0 | case R_PPC64_ADDR16_HIGHERA34: |
5341 | 0 | case R_PPC64_ADDR16_HIGHEST34: |
5342 | 0 | case R_PPC64_ADDR16_HIGHESTA34: |
5343 | 0 | case R_PPC64_D28: |
5344 | 0 | if (h != NULL && !bfd_link_pic (info) && abiversion (abfd) != 1 |
5345 | 0 | && rel->r_addend == 0) |
5346 | 0 | { |
5347 | | /* We may need a .plt entry if this reloc refers to a |
5348 | | function in a shared lib. */ |
5349 | 0 | if (!update_plt_info (abfd, &h->plt.plist, 0)) |
5350 | 0 | return false; |
5351 | 0 | h->pointer_equality_needed = 1; |
5352 | 0 | } |
5353 | | /* Fall through. */ |
5354 | | |
5355 | 0 | case R_PPC64_REL30: |
5356 | 0 | case R_PPC64_REL32: |
5357 | 0 | case R_PPC64_REL64: |
5358 | 0 | case R_PPC64_ADDR32: |
5359 | 0 | case R_PPC64_UADDR16: |
5360 | 0 | case R_PPC64_UADDR32: |
5361 | 0 | case R_PPC64_UADDR64: |
5362 | 0 | case R_PPC64_TOC: |
5363 | 0 | if (h != NULL && bfd_link_executable (info)) |
5364 | | /* We may need a copy reloc. */ |
5365 | 0 | h->non_got_ref = 1; |
5366 | | |
5367 | | /* Don't propagate .opd relocs. */ |
5368 | 0 | if (NO_OPD_RELOCS && is_opd) |
5369 | 0 | break; |
5370 | | |
5371 | | /* Set up information for symbols that might need dynamic |
5372 | | relocations. At this point in linking we have read all |
5373 | | the input files and resolved most symbols, but have not |
5374 | | yet decided whether symbols are dynamic or finalized |
5375 | | symbol flags. In some cases we might be setting dynamic |
5376 | | reloc info for symbols that do not end up needing such. |
5377 | | That's OK, adjust_dynamic_symbol and allocate_dynrelocs |
5378 | | work together with this code. */ |
5379 | 0 | dodyn: |
5380 | 0 | if ((h != NULL |
5381 | 0 | && !SYMBOL_REFERENCES_LOCAL (info, h)) |
5382 | 0 | || (bfd_link_pic (info) |
5383 | 0 | && (h != NULL |
5384 | 0 | ? !bfd_is_abs_symbol (&h->root) |
5385 | 0 | : isym->st_shndx != SHN_ABS) |
5386 | 0 | && must_be_dyn_reloc (info, r_type)) |
5387 | 0 | || (!bfd_link_pic (info) |
5388 | 0 | && ifunc != NULL)) |
5389 | 0 | { |
5390 | | /* We must copy these reloc types into the output file. |
5391 | | Create a reloc section in dynobj and make room for |
5392 | | this reloc. */ |
5393 | 0 | if (sreloc == NULL) |
5394 | 0 | { |
5395 | 0 | sreloc = _bfd_elf_make_dynamic_reloc_section |
5396 | 0 | (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ true); |
5397 | |
|
5398 | 0 | if (sreloc == NULL) |
5399 | 0 | return false; |
5400 | 0 | } |
5401 | | |
5402 | | /* If this is a global symbol, we count the number of |
5403 | | relocations we need for this symbol. */ |
5404 | 0 | if (h != NULL) |
5405 | 0 | { |
5406 | 0 | struct ppc_dyn_relocs *p; |
5407 | 0 | struct ppc_dyn_relocs **head; |
5408 | |
|
5409 | 0 | head = (struct ppc_dyn_relocs **) &h->dyn_relocs; |
5410 | 0 | p = *head; |
5411 | 0 | if (p == NULL || p->sec != sec) |
5412 | 0 | { |
5413 | 0 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
5414 | 0 | if (p == NULL) |
5415 | 0 | return false; |
5416 | 0 | p->next = *head; |
5417 | 0 | *head = p; |
5418 | 0 | p->sec = sec; |
5419 | 0 | p->count = 0; |
5420 | 0 | p->pc_count = 0; |
5421 | 0 | p->rel_count = 0; |
5422 | 0 | } |
5423 | 0 | p->count += 1; |
5424 | 0 | if (!must_be_dyn_reloc (info, r_type)) |
5425 | 0 | p->pc_count += 1; |
5426 | 0 | if (maybe_relr (r_type, rel, sec)) |
5427 | 0 | p->rel_count += 1; |
5428 | 0 | } |
5429 | 0 | else |
5430 | 0 | { |
5431 | | /* Track dynamic relocs needed for local syms too. */ |
5432 | 0 | struct ppc_local_dyn_relocs *p; |
5433 | 0 | struct ppc_local_dyn_relocs **head; |
5434 | 0 | bool is_ifunc; |
5435 | 0 | asection *s; |
5436 | 0 | void *vpp; |
5437 | |
|
5438 | 0 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
5439 | 0 | if (s == NULL) |
5440 | 0 | s = sec; |
5441 | |
|
5442 | 0 | vpp = &elf_section_data (s)->local_dynrel; |
5443 | 0 | head = (struct ppc_local_dyn_relocs **) vpp; |
5444 | 0 | is_ifunc = ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC; |
5445 | 0 | p = *head; |
5446 | 0 | if (p != NULL && p->sec == sec && p->ifunc != is_ifunc) |
5447 | 0 | p = p->next; |
5448 | 0 | if (p == NULL || p->sec != sec || p->ifunc != is_ifunc) |
5449 | 0 | { |
5450 | 0 | p = bfd_alloc (htab->elf.dynobj, sizeof *p); |
5451 | 0 | if (p == NULL) |
5452 | 0 | return false; |
5453 | 0 | p->next = *head; |
5454 | 0 | *head = p; |
5455 | 0 | p->sec = sec; |
5456 | 0 | p->count = 0; |
5457 | 0 | p->rel_count = 0; |
5458 | 0 | p->ifunc = is_ifunc; |
5459 | 0 | } |
5460 | 0 | p->count += 1; |
5461 | 0 | if (maybe_relr (r_type, rel, sec)) |
5462 | 0 | p->rel_count += 1; |
5463 | 0 | } |
5464 | 0 | } |
5465 | 0 | break; |
5466 | | |
5467 | 0 | default: |
5468 | 0 | break; |
5469 | 0 | } |
5470 | 0 | } |
5471 | | |
5472 | 0 | return true; |
5473 | 0 | } |
5474 | | |
5475 | | /* Merge backend specific data from an object file to the output |
5476 | | object file when linking. */ |
5477 | | |
5478 | | static bool |
5479 | | ppc64_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
5480 | 0 | { |
5481 | 0 | bfd *obfd = info->output_bfd; |
5482 | 0 | unsigned long iflags, oflags; |
5483 | |
|
5484 | 0 | if ((ibfd->flags & BFD_LINKER_CREATED) != 0) |
5485 | 0 | return true; |
5486 | | |
5487 | 0 | if (!is_ppc64_elf (ibfd) || !is_ppc64_elf (obfd)) |
5488 | 0 | return true; |
5489 | | |
5490 | 0 | if (!_bfd_generic_verify_endian_match (ibfd, info)) |
5491 | 0 | return false; |
5492 | | |
5493 | 0 | iflags = elf_elfheader (ibfd)->e_flags; |
5494 | 0 | oflags = elf_elfheader (obfd)->e_flags; |
5495 | |
|
5496 | 0 | if (iflags & ~EF_PPC64_ABI) |
5497 | 0 | { |
5498 | 0 | _bfd_error_handler |
5499 | | /* xgettext:c-format */ |
5500 | 0 | (_("%pB uses unknown e_flags 0x%lx"), ibfd, iflags); |
5501 | 0 | bfd_set_error (bfd_error_bad_value); |
5502 | 0 | return false; |
5503 | 0 | } |
5504 | 0 | else if (iflags != oflags && iflags != 0) |
5505 | 0 | { |
5506 | 0 | _bfd_error_handler |
5507 | | /* xgettext:c-format */ |
5508 | 0 | (_("%pB: ABI version %ld is not compatible with ABI version %ld output"), |
5509 | 0 | ibfd, iflags, oflags); |
5510 | 0 | bfd_set_error (bfd_error_bad_value); |
5511 | 0 | return false; |
5512 | 0 | } |
5513 | | |
5514 | 0 | if (!_bfd_elf_ppc_merge_fp_attributes (ibfd, info)) |
5515 | 0 | return false; |
5516 | | |
5517 | | /* Merge Tag_compatibility attributes and any common GNU ones. */ |
5518 | 0 | return _bfd_elf_merge_object_attributes (ibfd, info); |
5519 | 0 | } |
5520 | | |
5521 | | static bool |
5522 | | ppc64_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
5523 | 36 | { |
5524 | | /* Print normal ELF private data. */ |
5525 | 36 | _bfd_elf_print_private_bfd_data (abfd, ptr); |
5526 | | |
5527 | 36 | if (elf_elfheader (abfd)->e_flags != 0) |
5528 | 11 | { |
5529 | 11 | FILE *file = ptr; |
5530 | | |
5531 | 11 | fprintf (file, _("private flags = 0x%lx:"), |
5532 | 11 | elf_elfheader (abfd)->e_flags); |
5533 | | |
5534 | 11 | if ((elf_elfheader (abfd)->e_flags & EF_PPC64_ABI) != 0) |
5535 | 2 | fprintf (file, _(" [abiv%ld]"), |
5536 | 2 | elf_elfheader (abfd)->e_flags & EF_PPC64_ABI); |
5537 | 11 | fputc ('\n', file); |
5538 | 11 | } |
5539 | | |
5540 | 36 | return true; |
5541 | 36 | } |
5542 | | |
5543 | | /* OFFSET in OPD_SEC specifies a function descriptor. Return the address |
5544 | | of the code entry point, and its section, which must be in the same |
5545 | | object as OPD_SEC. Returns (bfd_vma) -1 on error. */ |
5546 | | |
5547 | | static bfd_vma |
5548 | | opd_entry_value (asection *opd_sec, |
5549 | | bfd_vma offset, |
5550 | | asection **code_sec, |
5551 | | bfd_vma *code_off, |
5552 | | bool in_code_sec) |
5553 | 0 | { |
5554 | 0 | bfd *opd_bfd = opd_sec->owner; |
5555 | 0 | Elf_Internal_Rela *relocs; |
5556 | 0 | Elf_Internal_Rela *lo, *hi, *look; |
5557 | 0 | bfd_vma val; |
5558 | |
|
5559 | 0 | if (!is_ppc64_elf (opd_bfd)) |
5560 | 0 | return (bfd_vma) -1; |
5561 | | |
5562 | 0 | if (ppc64_elf_section_data (opd_sec)->sec_type == sec_normal) |
5563 | 0 | ppc64_elf_section_data (opd_sec)->sec_type = sec_opd; |
5564 | 0 | else if (ppc64_elf_section_data (opd_sec)->sec_type != sec_opd) |
5565 | 0 | return (bfd_vma) -1; |
5566 | | |
5567 | | /* No relocs implies we are linking a --just-symbols object, or looking |
5568 | | at a final linked executable with addr2line or somesuch. */ |
5569 | 0 | if (opd_sec->reloc_count == 0) |
5570 | 0 | { |
5571 | 0 | bfd_byte *contents = ppc64_elf_section_data (opd_sec)->u.opd.u.contents; |
5572 | |
|
5573 | 0 | if (contents == NULL) |
5574 | 0 | { |
5575 | 0 | if ((opd_sec->flags & SEC_HAS_CONTENTS) == 0 |
5576 | 0 | || !bfd_malloc_and_get_section (opd_bfd, opd_sec, &contents)) |
5577 | 0 | return (bfd_vma) -1; |
5578 | 0 | ppc64_elf_section_data (opd_sec)->u.opd.u.contents = contents; |
5579 | 0 | } |
5580 | | |
5581 | | /* PR 17512: file: 64b9dfbb. */ |
5582 | 0 | if (offset + 7 >= opd_sec->size || offset + 7 < offset) |
5583 | 0 | return (bfd_vma) -1; |
5584 | | |
5585 | 0 | val = bfd_get_64 (opd_bfd, contents + offset); |
5586 | 0 | if (code_sec != NULL) |
5587 | 0 | { |
5588 | 0 | asection *sec, *likely = NULL; |
5589 | |
|
5590 | 0 | if (in_code_sec) |
5591 | 0 | { |
5592 | 0 | sec = *code_sec; |
5593 | 0 | if (sec->vma <= val |
5594 | 0 | && val < sec->vma + sec->size) |
5595 | 0 | likely = sec; |
5596 | 0 | else |
5597 | 0 | val = -1; |
5598 | 0 | } |
5599 | 0 | else |
5600 | 0 | for (sec = opd_bfd->sections; sec != NULL; sec = sec->next) |
5601 | 0 | if (sec->vma <= val |
5602 | 0 | && (sec->flags & SEC_LOAD) != 0 |
5603 | 0 | && (sec->flags & SEC_ALLOC) != 0) |
5604 | 0 | likely = sec; |
5605 | 0 | if (likely != NULL) |
5606 | 0 | { |
5607 | 0 | *code_sec = likely; |
5608 | 0 | if (code_off != NULL) |
5609 | 0 | *code_off = val - likely->vma; |
5610 | 0 | } |
5611 | 0 | } |
5612 | 0 | return val; |
5613 | 0 | } |
5614 | | |
5615 | 0 | relocs = ppc64_elf_section_data (opd_sec)->u.opd.u.relocs; |
5616 | 0 | if (relocs == NULL) |
5617 | 0 | relocs = _bfd_elf_link_read_relocs (opd_bfd, opd_sec, NULL, NULL, true); |
5618 | | /* PR 17512: file: df8e1fd6. */ |
5619 | 0 | if (relocs == NULL) |
5620 | 0 | return (bfd_vma) -1; |
5621 | | |
5622 | | /* Go find the opd reloc at the sym address. */ |
5623 | 0 | lo = relocs; |
5624 | 0 | hi = lo + opd_sec->reloc_count - 1; /* ignore last reloc */ |
5625 | 0 | val = (bfd_vma) -1; |
5626 | 0 | while (lo < hi) |
5627 | 0 | { |
5628 | 0 | look = lo + (hi - lo) / 2; |
5629 | 0 | if (look->r_offset < offset) |
5630 | 0 | lo = look + 1; |
5631 | 0 | else if (look->r_offset > offset) |
5632 | 0 | hi = look; |
5633 | 0 | else |
5634 | 0 | { |
5635 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (opd_bfd); |
5636 | |
|
5637 | 0 | if (ELF64_R_TYPE (look->r_info) == R_PPC64_ADDR64 |
5638 | 0 | && ELF64_R_TYPE ((look + 1)->r_info) == R_PPC64_TOC) |
5639 | 0 | { |
5640 | 0 | unsigned long symndx = ELF64_R_SYM (look->r_info); |
5641 | 0 | asection *sec = NULL; |
5642 | |
|
5643 | 0 | if (symndx >= symtab_hdr->sh_info |
5644 | 0 | && elf_sym_hashes (opd_bfd) != NULL) |
5645 | 0 | { |
5646 | 0 | struct elf_link_hash_entry **sym_hashes; |
5647 | 0 | struct elf_link_hash_entry *rh; |
5648 | |
|
5649 | 0 | sym_hashes = elf_sym_hashes (opd_bfd); |
5650 | 0 | rh = sym_hashes[symndx - symtab_hdr->sh_info]; |
5651 | 0 | if (rh != NULL) |
5652 | 0 | { |
5653 | 0 | rh = elf_follow_link (rh); |
5654 | 0 | if (rh->root.type != bfd_link_hash_defined |
5655 | 0 | && rh->root.type != bfd_link_hash_defweak) |
5656 | 0 | break; |
5657 | 0 | if (rh->root.u.def.section->owner == opd_bfd) |
5658 | 0 | { |
5659 | 0 | val = rh->root.u.def.value; |
5660 | 0 | sec = rh->root.u.def.section; |
5661 | 0 | } |
5662 | 0 | } |
5663 | 0 | } |
5664 | | |
5665 | 0 | if (sec == NULL) |
5666 | 0 | { |
5667 | 0 | Elf_Internal_Sym *sym; |
5668 | |
|
5669 | 0 | if (symndx < symtab_hdr->sh_info) |
5670 | 0 | { |
5671 | 0 | sym = (Elf_Internal_Sym *) symtab_hdr->contents; |
5672 | 0 | if (sym == NULL) |
5673 | 0 | { |
5674 | 0 | size_t symcnt = symtab_hdr->sh_info; |
5675 | 0 | sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, |
5676 | 0 | symcnt, 0, |
5677 | 0 | NULL, NULL, NULL); |
5678 | 0 | if (sym == NULL) |
5679 | 0 | break; |
5680 | 0 | symtab_hdr->contents = (bfd_byte *) sym; |
5681 | 0 | } |
5682 | 0 | sym += symndx; |
5683 | 0 | } |
5684 | 0 | else |
5685 | 0 | { |
5686 | 0 | sym = bfd_elf_get_elf_syms (opd_bfd, symtab_hdr, |
5687 | 0 | 1, symndx, |
5688 | 0 | NULL, NULL, NULL); |
5689 | 0 | if (sym == NULL) |
5690 | 0 | break; |
5691 | 0 | } |
5692 | 0 | sec = bfd_section_from_elf_index (opd_bfd, sym->st_shndx); |
5693 | 0 | if (sec != NULL) |
5694 | 0 | { |
5695 | 0 | BFD_ASSERT ((sec->flags & SEC_MERGE) == 0); |
5696 | 0 | val = sym->st_value; |
5697 | 0 | } |
5698 | 0 | if (symndx >= symtab_hdr->sh_info) |
5699 | 0 | free (sym); |
5700 | 0 | if (sec == NULL) |
5701 | 0 | break; |
5702 | 0 | } |
5703 | | |
5704 | 0 | val += look->r_addend; |
5705 | 0 | if (code_off != NULL) |
5706 | 0 | *code_off = val; |
5707 | 0 | if (code_sec != NULL) |
5708 | 0 | { |
5709 | 0 | if (in_code_sec && *code_sec != sec) |
5710 | 0 | return -1; |
5711 | 0 | else |
5712 | 0 | *code_sec = sec; |
5713 | 0 | } |
5714 | 0 | if (sec->output_section != NULL) |
5715 | 0 | val += sec->output_section->vma + sec->output_offset; |
5716 | 0 | } |
5717 | 0 | break; |
5718 | 0 | } |
5719 | 0 | } |
5720 | | |
5721 | 0 | return val; |
5722 | 0 | } |
5723 | | |
5724 | | /* If the ELF symbol SYM might be a function in SEC, return the |
5725 | | function size and set *CODE_OFF to the function's entry point, |
5726 | | otherwise return zero. */ |
5727 | | |
5728 | | static bfd_size_type |
5729 | | ppc64_elf_maybe_function_sym (const asymbol *sym, asection *sec, |
5730 | | bfd_vma *code_off) |
5731 | 1.99k | { |
5732 | 1.99k | bfd_size_type size; |
5733 | 1.99k | elf_symbol_type * elf_sym = (elf_symbol_type *) sym; |
5734 | | |
5735 | 1.99k | if ((sym->flags & (BSF_SECTION_SYM | BSF_FILE | BSF_OBJECT |
5736 | 1.99k | | BSF_THREAD_LOCAL | BSF_RELC | BSF_SRELC)) != 0) |
5737 | 201 | return 0; |
5738 | | |
5739 | 1.79k | size = (sym->flags & BSF_SYNTHETIC) ? 0 : elf_sym->internal_elf_sym.st_size; |
5740 | | |
5741 | | /* In theory we should check that the symbol's type satisfies |
5742 | | _bfd_elf_is_function_type(), but there are some function-like |
5743 | | symbols which would fail this test. (eg _start). Instead |
5744 | | we check for hidden, local, notype symbols with zero size. |
5745 | | This type of symbol is generated by the annobin plugin for gcc |
5746 | | and clang, and should not be considered to be a function symbol. */ |
5747 | 1.79k | if (size == 0 |
5748 | 1.79k | && ((sym->flags & (BSF_SYNTHETIC | BSF_LOCAL)) == BSF_LOCAL) |
5749 | 1.79k | && ELF_ST_TYPE (elf_sym->internal_elf_sym.st_info) == STT_NOTYPE |
5750 | 1.79k | && ELF_ST_VISIBILITY (elf_sym->internal_elf_sym.st_other) == STV_HIDDEN) |
5751 | 91 | return 0; |
5752 | | |
5753 | 1.70k | if (strcmp (sym->section->name, ".opd") == 0) |
5754 | 0 | { |
5755 | 0 | struct _opd_sec_data *opd = get_opd_info (sym->section); |
5756 | 0 | bfd_vma symval = sym->value; |
5757 | |
|
5758 | 0 | if (opd != NULL |
5759 | 0 | && opd->adjust != NULL |
5760 | 0 | && elf_section_data (sym->section)->relocs != NULL) |
5761 | 0 | { |
5762 | | /* opd_entry_value will use cached relocs that have been |
5763 | | adjusted, but with raw symbols. That means both local |
5764 | | and global symbols need adjusting. */ |
5765 | 0 | long adjust = opd->adjust[OPD_NDX (symval)]; |
5766 | 0 | if (adjust == -1) |
5767 | 0 | return 0; |
5768 | 0 | symval += adjust; |
5769 | 0 | } |
5770 | | |
5771 | 0 | if (opd_entry_value (sym->section, symval, |
5772 | 0 | &sec, code_off, true) == (bfd_vma) -1) |
5773 | 0 | return 0; |
5774 | | /* An old ABI binary with dot-syms has a size of 24 on the .opd |
5775 | | symbol. This size has nothing to do with the code size of the |
5776 | | function, which is what we're supposed to return, but the |
5777 | | code size isn't available without looking up the dot-sym. |
5778 | | However, doing that would be a waste of time particularly |
5779 | | since elf_find_function will look at the dot-sym anyway. |
5780 | | Now, elf_find_function will keep the largest size of any |
5781 | | function sym found at the code address of interest, so return |
5782 | | 1 here to avoid it incorrectly caching a larger function size |
5783 | | for a small function. This does mean we return the wrong |
5784 | | size for a new-ABI function of size 24, but all that does is |
5785 | | disable caching for such functions. */ |
5786 | 0 | if (size == 24) |
5787 | 0 | size = 1; |
5788 | 0 | } |
5789 | 1.70k | else |
5790 | 1.70k | { |
5791 | 1.70k | if (sym->section != sec) |
5792 | 1.68k | return 0; |
5793 | 19 | *code_off = sym->value; |
5794 | 19 | } |
5795 | | |
5796 | | /* Do not return 0 for the function's size. */ |
5797 | 19 | return size ? size : 1; |
5798 | 1.70k | } |
5799 | | |
5800 | | /* Return true if symbol is a strong function defined in an ELFv2 |
5801 | | object with st_other localentry bits of zero, ie. its local entry |
5802 | | point coincides with its global entry point. */ |
5803 | | |
5804 | | static bool |
5805 | | is_elfv2_localentry0 (struct elf_link_hash_entry *h) |
5806 | 0 | { |
5807 | 0 | return (h != NULL |
5808 | 0 | && h->type == STT_FUNC |
5809 | 0 | && h->root.type == bfd_link_hash_defined |
5810 | 0 | && (STO_PPC64_LOCAL_MASK & h->other) == 0 |
5811 | 0 | && !ppc_elf_hash_entry (h)->non_zero_localentry |
5812 | 0 | && is_ppc64_elf (h->root.u.def.section->owner) |
5813 | 0 | && abiversion (h->root.u.def.section->owner) >= 2); |
5814 | 0 | } |
5815 | | |
5816 | | /* Return true if symbol is defined in a regular object file. */ |
5817 | | |
5818 | | static bool |
5819 | | is_static_defined (struct elf_link_hash_entry *h) |
5820 | 0 | { |
5821 | 0 | return ((h->root.type == bfd_link_hash_defined |
5822 | 0 | || h->root.type == bfd_link_hash_defweak) |
5823 | 0 | && h->root.u.def.section != NULL |
5824 | 0 | && h->root.u.def.section->output_section != NULL); |
5825 | 0 | } |
5826 | | |
5827 | | /* If FDH is a function descriptor symbol, return the associated code |
5828 | | entry symbol if it is defined. Return NULL otherwise. */ |
5829 | | |
5830 | | static struct ppc_link_hash_entry * |
5831 | | defined_code_entry (struct ppc_link_hash_entry *fdh) |
5832 | 0 | { |
5833 | 0 | if (fdh->is_func_descriptor) |
5834 | 0 | { |
5835 | 0 | struct ppc_link_hash_entry *fh = ppc_follow_link (fdh->oh); |
5836 | 0 | if (fh->elf.root.type == bfd_link_hash_defined |
5837 | 0 | || fh->elf.root.type == bfd_link_hash_defweak) |
5838 | 0 | return fh; |
5839 | 0 | } |
5840 | 0 | return NULL; |
5841 | 0 | } |
5842 | | |
5843 | | /* If FH is a function code entry symbol, return the associated |
5844 | | function descriptor symbol if it is defined. Return NULL otherwise. */ |
5845 | | |
5846 | | static struct ppc_link_hash_entry * |
5847 | | defined_func_desc (struct ppc_link_hash_entry *fh) |
5848 | 0 | { |
5849 | 0 | if (fh->oh != NULL |
5850 | 0 | && fh->oh->is_func_descriptor) |
5851 | 0 | { |
5852 | 0 | struct ppc_link_hash_entry *fdh = ppc_follow_link (fh->oh); |
5853 | 0 | if (fdh->elf.root.type == bfd_link_hash_defined |
5854 | 0 | || fdh->elf.root.type == bfd_link_hash_defweak) |
5855 | 0 | return fdh; |
5856 | 0 | } |
5857 | 0 | return NULL; |
5858 | 0 | } |
5859 | | |
5860 | | /* Given H is a symbol that satisfies is_static_defined, return the |
5861 | | value in the output file. */ |
5862 | | |
5863 | | static bfd_vma |
5864 | | defined_sym_val (struct elf_link_hash_entry *h) |
5865 | 0 | { |
5866 | 0 | return (h->root.u.def.section->output_section->vma |
5867 | 0 | + h->root.u.def.section->output_offset |
5868 | 0 | + h->root.u.def.value); |
5869 | 0 | } |
5870 | | |
5871 | | /* Return true if H matches __tls_get_addr or one of its variants. */ |
5872 | | |
5873 | | static bool |
5874 | | is_tls_get_addr (struct elf_link_hash_entry *h, |
5875 | | struct ppc_link_hash_table *htab) |
5876 | 0 | { |
5877 | 0 | return (h == elf_hash_entry (htab->tls_get_addr_fd) |
5878 | 0 | || h == elf_hash_entry (htab->tga_desc_fd) |
5879 | 0 | || h == elf_hash_entry (htab->tls_get_addr) |
5880 | 0 | || h == elf_hash_entry (htab->tga_desc)); |
5881 | 0 | } |
5882 | | |
5883 | | static bool func_desc_adjust (struct elf_link_hash_entry *, void *); |
5884 | | |
5885 | | /* Garbage collect sections, after first dealing with dot-symbols. */ |
5886 | | |
5887 | | static bool |
5888 | | ppc64_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) |
5889 | 0 | { |
5890 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
5891 | |
|
5892 | 0 | if (htab != NULL && htab->need_func_desc_adj) |
5893 | 0 | { |
5894 | 0 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); |
5895 | 0 | htab->need_func_desc_adj = 0; |
5896 | 0 | } |
5897 | 0 | return bfd_elf_gc_sections (abfd, info); |
5898 | 0 | } |
5899 | | |
5900 | | /* Mark all our entry sym sections, both opd and code section. */ |
5901 | | |
5902 | | static void |
5903 | | ppc64_elf_gc_keep (struct bfd_link_info *info) |
5904 | 0 | { |
5905 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
5906 | 0 | struct bfd_sym_chain *sym; |
5907 | |
|
5908 | 0 | if (htab == NULL) |
5909 | 0 | return; |
5910 | | |
5911 | 0 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) |
5912 | 0 | { |
5913 | 0 | struct ppc_link_hash_entry *eh, *fh; |
5914 | 0 | asection *sec; |
5915 | |
|
5916 | 0 | eh = ppc_elf_hash_entry (elf_link_hash_lookup (&htab->elf, sym->name, |
5917 | 0 | false, false, true)); |
5918 | 0 | if (eh == NULL) |
5919 | 0 | continue; |
5920 | 0 | if (eh->elf.root.type != bfd_link_hash_defined |
5921 | 0 | && eh->elf.root.type != bfd_link_hash_defweak) |
5922 | 0 | continue; |
5923 | | |
5924 | 0 | fh = defined_code_entry (eh); |
5925 | 0 | if (fh != NULL) |
5926 | 0 | { |
5927 | 0 | sec = fh->elf.root.u.def.section; |
5928 | 0 | sec->flags |= SEC_KEEP; |
5929 | 0 | } |
5930 | 0 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
5931 | 0 | && opd_entry_value (eh->elf.root.u.def.section, |
5932 | 0 | eh->elf.root.u.def.value, |
5933 | 0 | &sec, NULL, false) != (bfd_vma) -1) |
5934 | 0 | sec->flags |= SEC_KEEP; |
5935 | |
|
5936 | 0 | sec = eh->elf.root.u.def.section; |
5937 | 0 | sec->flags |= SEC_KEEP; |
5938 | 0 | } |
5939 | 0 | } |
5940 | | |
5941 | | /* Mark sections containing dynamically referenced symbols. When |
5942 | | building shared libraries, we must assume that any visible symbol is |
5943 | | referenced. */ |
5944 | | |
5945 | | static bool |
5946 | | ppc64_elf_gc_mark_dynamic_ref (struct elf_link_hash_entry *h, void *inf) |
5947 | 0 | { |
5948 | 0 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
5949 | 0 | struct ppc_link_hash_entry *eh = ppc_elf_hash_entry (h); |
5950 | 0 | struct ppc_link_hash_entry *fdh; |
5951 | 0 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
5952 | | |
5953 | | /* Dynamic linking info is on the func descriptor sym. */ |
5954 | 0 | fdh = defined_func_desc (eh); |
5955 | 0 | if (fdh != NULL) |
5956 | 0 | eh = fdh; |
5957 | |
|
5958 | 0 | if ((eh->elf.root.type == bfd_link_hash_defined |
5959 | 0 | || eh->elf.root.type == bfd_link_hash_defweak) |
5960 | 0 | && (!eh->elf.start_stop |
5961 | 0 | || eh->elf.root.ldscript_def |
5962 | 0 | || !info->start_stop_gc) |
5963 | 0 | && ((eh->elf.ref_dynamic && !eh->elf.forced_local) |
5964 | 0 | || ((eh->elf.def_regular || ELF_COMMON_DEF_P (&eh->elf)) |
5965 | 0 | && ELF_ST_VISIBILITY (eh->elf.other) != STV_INTERNAL |
5966 | 0 | && ELF_ST_VISIBILITY (eh->elf.other) != STV_HIDDEN |
5967 | 0 | && (!bfd_link_executable (info) |
5968 | 0 | || info->gc_keep_exported |
5969 | 0 | || info->export_dynamic |
5970 | 0 | || (eh->elf.dynamic |
5971 | 0 | && d != NULL |
5972 | 0 | && (*d->match) (&d->head, NULL, |
5973 | 0 | eh->elf.root.root.string))) |
5974 | 0 | && (eh->elf.versioned >= versioned |
5975 | 0 | || !bfd_hide_sym_by_version (info->version_info, |
5976 | 0 | eh->elf.root.root.string))))) |
5977 | 0 | { |
5978 | 0 | asection *code_sec; |
5979 | 0 | struct ppc_link_hash_entry *fh; |
5980 | |
|
5981 | 0 | eh->elf.root.u.def.section->flags |= SEC_KEEP; |
5982 | | |
5983 | | /* Function descriptor syms cause the associated |
5984 | | function code sym section to be marked. */ |
5985 | 0 | fh = defined_code_entry (eh); |
5986 | 0 | if (fh != NULL) |
5987 | 0 | { |
5988 | 0 | code_sec = fh->elf.root.u.def.section; |
5989 | 0 | code_sec->flags |= SEC_KEEP; |
5990 | 0 | } |
5991 | 0 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
5992 | 0 | && opd_entry_value (eh->elf.root.u.def.section, |
5993 | 0 | eh->elf.root.u.def.value, |
5994 | 0 | &code_sec, NULL, false) != (bfd_vma) -1) |
5995 | 0 | code_sec->flags |= SEC_KEEP; |
5996 | 0 | } |
5997 | |
|
5998 | 0 | return true; |
5999 | 0 | } |
6000 | | |
6001 | | /* Return the section that should be marked against GC for a given |
6002 | | relocation. */ |
6003 | | |
6004 | | static asection * |
6005 | | ppc64_elf_gc_mark_hook (asection *sec, |
6006 | | struct bfd_link_info *info, |
6007 | | Elf_Internal_Rela *rel, |
6008 | | struct elf_link_hash_entry *h, |
6009 | | Elf_Internal_Sym *sym) |
6010 | 0 | { |
6011 | 0 | asection *rsec; |
6012 | | |
6013 | | /* Syms return NULL if we're marking .opd, so we avoid marking all |
6014 | | function sections, as all functions are referenced in .opd. */ |
6015 | 0 | rsec = NULL; |
6016 | 0 | if (get_opd_info (sec) != NULL) |
6017 | 0 | return rsec; |
6018 | | |
6019 | 0 | if (h != NULL) |
6020 | 0 | { |
6021 | 0 | enum elf_ppc64_reloc_type r_type; |
6022 | 0 | struct ppc_link_hash_entry *eh, *fh, *fdh; |
6023 | |
|
6024 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
6025 | 0 | switch (r_type) |
6026 | 0 | { |
6027 | 0 | case R_PPC64_GNU_VTINHERIT: |
6028 | 0 | case R_PPC64_GNU_VTENTRY: |
6029 | 0 | break; |
6030 | | |
6031 | 0 | default: |
6032 | 0 | switch (h->root.type) |
6033 | 0 | { |
6034 | 0 | case bfd_link_hash_defined: |
6035 | 0 | case bfd_link_hash_defweak: |
6036 | 0 | eh = ppc_elf_hash_entry (h); |
6037 | 0 | fdh = defined_func_desc (eh); |
6038 | 0 | if (fdh != NULL) |
6039 | 0 | { |
6040 | | /* -mcall-aixdesc code references the dot-symbol on |
6041 | | a call reloc. Mark the function descriptor too |
6042 | | against garbage collection. */ |
6043 | 0 | fdh->elf.mark = 1; |
6044 | 0 | if (fdh->elf.is_weakalias) |
6045 | 0 | weakdef (&fdh->elf)->mark = 1; |
6046 | 0 | eh = fdh; |
6047 | 0 | } |
6048 | | |
6049 | | /* Function descriptor syms cause the associated |
6050 | | function code sym section to be marked. */ |
6051 | 0 | fh = defined_code_entry (eh); |
6052 | 0 | if (fh != NULL) |
6053 | 0 | { |
6054 | | /* They also mark their opd section. */ |
6055 | 0 | eh->elf.root.u.def.section->gc_mark = 1; |
6056 | |
|
6057 | 0 | rsec = fh->elf.root.u.def.section; |
6058 | 0 | } |
6059 | 0 | else if (get_opd_info (eh->elf.root.u.def.section) != NULL |
6060 | 0 | && opd_entry_value (eh->elf.root.u.def.section, |
6061 | 0 | eh->elf.root.u.def.value, |
6062 | 0 | &rsec, NULL, false) != (bfd_vma) -1) |
6063 | 0 | eh->elf.root.u.def.section->gc_mark = 1; |
6064 | 0 | else |
6065 | 0 | rsec = h->root.u.def.section; |
6066 | 0 | break; |
6067 | | |
6068 | 0 | case bfd_link_hash_common: |
6069 | 0 | rsec = h->root.u.c.p->section; |
6070 | 0 | break; |
6071 | | |
6072 | 0 | default: |
6073 | 0 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
6074 | 0 | } |
6075 | 0 | } |
6076 | 0 | } |
6077 | 0 | else |
6078 | 0 | { |
6079 | 0 | struct _opd_sec_data *opd; |
6080 | |
|
6081 | 0 | rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
6082 | 0 | opd = get_opd_info (rsec); |
6083 | 0 | if (opd != NULL && opd->func_sec != NULL) |
6084 | 0 | { |
6085 | 0 | rsec->gc_mark = 1; |
6086 | |
|
6087 | 0 | rsec = opd->func_sec[OPD_NDX (sym->st_value + rel->r_addend)]; |
6088 | 0 | } |
6089 | 0 | } |
6090 | | |
6091 | 0 | return rsec; |
6092 | 0 | } |
6093 | | |
6094 | | /* The maximum size of .sfpr. */ |
6095 | 0 | #define SFPR_MAX (218*4) |
6096 | | |
6097 | | struct sfpr_def_parms |
6098 | | { |
6099 | | const char name[12]; |
6100 | | unsigned char lo, hi; |
6101 | | bfd_byte *(*write_ent) (bfd *, bfd_byte *, int); |
6102 | | bfd_byte *(*write_tail) (bfd *, bfd_byte *, int); |
6103 | | }; |
6104 | | |
6105 | | /* Auto-generate _save*, _rest* functions in .sfpr. |
6106 | | If STUB_SEC is non-null, define alias symbols in STUB_SEC |
6107 | | instead. */ |
6108 | | |
6109 | | static bool |
6110 | | sfpr_define (struct bfd_link_info *info, |
6111 | | const struct sfpr_def_parms *parm, |
6112 | | asection *stub_sec) |
6113 | 0 | { |
6114 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
6115 | 0 | unsigned int i; |
6116 | 0 | size_t len = strlen (parm->name); |
6117 | 0 | bool writing = false; |
6118 | 0 | char sym[16]; |
6119 | |
|
6120 | 0 | if (htab == NULL) |
6121 | 0 | return false; |
6122 | | |
6123 | 0 | memcpy (sym, parm->name, len); |
6124 | 0 | sym[len + 2] = 0; |
6125 | |
|
6126 | 0 | for (i = parm->lo; i <= parm->hi; i++) |
6127 | 0 | { |
6128 | 0 | struct ppc_link_hash_entry *h; |
6129 | |
|
6130 | 0 | sym[len + 0] = i / 10 + '0'; |
6131 | 0 | sym[len + 1] = i % 10 + '0'; |
6132 | 0 | h = ppc_elf_hash_entry (elf_link_hash_lookup (&htab->elf, sym, |
6133 | 0 | writing, true, true)); |
6134 | 0 | if (stub_sec != NULL) |
6135 | 0 | { |
6136 | 0 | if (h != NULL |
6137 | 0 | && h->elf.root.type == bfd_link_hash_defined |
6138 | 0 | && h->elf.root.u.def.section == htab->sfpr) |
6139 | 0 | { |
6140 | 0 | struct elf_link_hash_entry *s; |
6141 | 0 | char buf[32]; |
6142 | 0 | sprintf (buf, "%08x.%s", stub_sec->id & 0xffffffff, sym); |
6143 | 0 | s = elf_link_hash_lookup (&htab->elf, buf, true, true, false); |
6144 | 0 | if (s == NULL) |
6145 | 0 | return false; |
6146 | 0 | if (s->root.type == bfd_link_hash_new) |
6147 | 0 | { |
6148 | 0 | s->root.type = bfd_link_hash_defined; |
6149 | 0 | s->root.u.def.section = stub_sec; |
6150 | 0 | s->root.u.def.value = (stub_sec->size - htab->sfpr->size |
6151 | 0 | + h->elf.root.u.def.value); |
6152 | 0 | s->ref_regular = 1; |
6153 | 0 | s->def_regular = 1; |
6154 | 0 | s->ref_regular_nonweak = 1; |
6155 | 0 | s->forced_local = 1; |
6156 | 0 | s->non_elf = 0; |
6157 | 0 | s->root.linker_def = 1; |
6158 | 0 | } |
6159 | 0 | } |
6160 | 0 | continue; |
6161 | 0 | } |
6162 | 0 | if (h != NULL) |
6163 | 0 | { |
6164 | 0 | h->save_res = 1; |
6165 | 0 | if (!h->elf.def_regular) |
6166 | 0 | { |
6167 | 0 | h->elf.root.type = bfd_link_hash_defined; |
6168 | 0 | h->elf.root.u.def.section = htab->sfpr; |
6169 | 0 | h->elf.root.u.def.value = htab->sfpr->size; |
6170 | 0 | h->elf.type = STT_FUNC; |
6171 | 0 | h->elf.def_regular = 1; |
6172 | 0 | h->elf.non_elf = 0; |
6173 | 0 | _bfd_elf_link_hash_hide_symbol (info, &h->elf, true); |
6174 | 0 | writing = true; |
6175 | 0 | if (htab->sfpr->contents == NULL) |
6176 | 0 | { |
6177 | 0 | htab->sfpr->contents |
6178 | 0 | = bfd_alloc (htab->elf.dynobj, SFPR_MAX); |
6179 | 0 | if (htab->sfpr->contents == NULL) |
6180 | 0 | return false; |
6181 | 0 | htab->sfpr->alloced = 1; |
6182 | 0 | } |
6183 | 0 | } |
6184 | 0 | } |
6185 | 0 | if (writing) |
6186 | 0 | { |
6187 | 0 | bfd_byte *p = htab->sfpr->contents + htab->sfpr->size; |
6188 | 0 | if (i != parm->hi) |
6189 | 0 | p = (*parm->write_ent) (htab->elf.dynobj, p, i); |
6190 | 0 | else |
6191 | 0 | p = (*parm->write_tail) (htab->elf.dynobj, p, i); |
6192 | 0 | htab->sfpr->size = p - htab->sfpr->contents; |
6193 | 0 | } |
6194 | 0 | } |
6195 | | |
6196 | 0 | return true; |
6197 | 0 | } |
6198 | | |
6199 | | static bfd_byte * |
6200 | | savegpr0 (bfd *abfd, bfd_byte *p, int r) |
6201 | 0 | { |
6202 | 0 | bfd_put_32 (abfd, STD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
6203 | 0 | return p + 4; |
6204 | 0 | } |
6205 | | |
6206 | | static bfd_byte * |
6207 | | savegpr0_tail (bfd *abfd, bfd_byte *p, int r) |
6208 | 0 | { |
6209 | 0 | p = savegpr0 (abfd, p, r); |
6210 | 0 | bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); |
6211 | 0 | p = p + 4; |
6212 | 0 | bfd_put_32 (abfd, BLR, p); |
6213 | 0 | return p + 4; |
6214 | 0 | } |
6215 | | |
6216 | | static bfd_byte * |
6217 | | restgpr0 (bfd *abfd, bfd_byte *p, int r) |
6218 | 0 | { |
6219 | 0 | bfd_put_32 (abfd, LD_R0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
6220 | 0 | return p + 4; |
6221 | 0 | } |
6222 | | |
6223 | | static bfd_byte * |
6224 | | restgpr0_tail (bfd *abfd, bfd_byte *p, int r) |
6225 | 0 | { |
6226 | 0 | bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); |
6227 | 0 | p = p + 4; |
6228 | 0 | p = restgpr0 (abfd, p, r); |
6229 | 0 | bfd_put_32 (abfd, MTLR_R0, p); |
6230 | 0 | p = p + 4; |
6231 | 0 | if (r == 29) |
6232 | 0 | { |
6233 | 0 | p = restgpr0 (abfd, p, 30); |
6234 | 0 | p = restgpr0 (abfd, p, 31); |
6235 | 0 | } |
6236 | 0 | bfd_put_32 (abfd, BLR, p); |
6237 | 0 | return p + 4; |
6238 | 0 | } |
6239 | | |
6240 | | static bfd_byte * |
6241 | | savegpr1 (bfd *abfd, bfd_byte *p, int r) |
6242 | 0 | { |
6243 | 0 | bfd_put_32 (abfd, STD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
6244 | 0 | return p + 4; |
6245 | 0 | } |
6246 | | |
6247 | | static bfd_byte * |
6248 | | savegpr1_tail (bfd *abfd, bfd_byte *p, int r) |
6249 | 0 | { |
6250 | 0 | p = savegpr1 (abfd, p, r); |
6251 | 0 | bfd_put_32 (abfd, BLR, p); |
6252 | 0 | return p + 4; |
6253 | 0 | } |
6254 | | |
6255 | | static bfd_byte * |
6256 | | restgpr1 (bfd *abfd, bfd_byte *p, int r) |
6257 | 0 | { |
6258 | 0 | bfd_put_32 (abfd, LD_R0_0R12 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
6259 | 0 | return p + 4; |
6260 | 0 | } |
6261 | | |
6262 | | static bfd_byte * |
6263 | | restgpr1_tail (bfd *abfd, bfd_byte *p, int r) |
6264 | 0 | { |
6265 | 0 | p = restgpr1 (abfd, p, r); |
6266 | 0 | bfd_put_32 (abfd, BLR, p); |
6267 | 0 | return p + 4; |
6268 | 0 | } |
6269 | | |
6270 | | static bfd_byte * |
6271 | | savefpr (bfd *abfd, bfd_byte *p, int r) |
6272 | 0 | { |
6273 | 0 | bfd_put_32 (abfd, STFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
6274 | 0 | return p + 4; |
6275 | 0 | } |
6276 | | |
6277 | | static bfd_byte * |
6278 | | savefpr0_tail (bfd *abfd, bfd_byte *p, int r) |
6279 | 0 | { |
6280 | 0 | p = savefpr (abfd, p, r); |
6281 | 0 | bfd_put_32 (abfd, STD_R0_0R1 + STK_LR, p); |
6282 | 0 | p = p + 4; |
6283 | 0 | bfd_put_32 (abfd, BLR, p); |
6284 | 0 | return p + 4; |
6285 | 0 | } |
6286 | | |
6287 | | static bfd_byte * |
6288 | | restfpr (bfd *abfd, bfd_byte *p, int r) |
6289 | 0 | { |
6290 | 0 | bfd_put_32 (abfd, LFD_FR0_0R1 + (r << 21) + (1 << 16) - (32 - r) * 8, p); |
6291 | 0 | return p + 4; |
6292 | 0 | } |
6293 | | |
6294 | | static bfd_byte * |
6295 | | restfpr0_tail (bfd *abfd, bfd_byte *p, int r) |
6296 | 0 | { |
6297 | 0 | bfd_put_32 (abfd, LD_R0_0R1 + STK_LR, p); |
6298 | 0 | p = p + 4; |
6299 | 0 | p = restfpr (abfd, p, r); |
6300 | 0 | bfd_put_32 (abfd, MTLR_R0, p); |
6301 | 0 | p = p + 4; |
6302 | 0 | if (r == 29) |
6303 | 0 | { |
6304 | 0 | p = restfpr (abfd, p, 30); |
6305 | 0 | p = restfpr (abfd, p, 31); |
6306 | 0 | } |
6307 | 0 | bfd_put_32 (abfd, BLR, p); |
6308 | 0 | return p + 4; |
6309 | 0 | } |
6310 | | |
6311 | | static bfd_byte * |
6312 | | savefpr1_tail (bfd *abfd, bfd_byte *p, int r) |
6313 | 0 | { |
6314 | 0 | p = savefpr (abfd, p, r); |
6315 | 0 | bfd_put_32 (abfd, BLR, p); |
6316 | 0 | return p + 4; |
6317 | 0 | } |
6318 | | |
6319 | | static bfd_byte * |
6320 | | restfpr1_tail (bfd *abfd, bfd_byte *p, int r) |
6321 | 0 | { |
6322 | 0 | p = restfpr (abfd, p, r); |
6323 | 0 | bfd_put_32 (abfd, BLR, p); |
6324 | 0 | return p + 4; |
6325 | 0 | } |
6326 | | |
6327 | | static bfd_byte * |
6328 | | savevr (bfd *abfd, bfd_byte *p, int r) |
6329 | 0 | { |
6330 | 0 | bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); |
6331 | 0 | p = p + 4; |
6332 | 0 | bfd_put_32 (abfd, STVX_VR0_R12_R0 + (r << 21), p); |
6333 | 0 | return p + 4; |
6334 | 0 | } |
6335 | | |
6336 | | static bfd_byte * |
6337 | | savevr_tail (bfd *abfd, bfd_byte *p, int r) |
6338 | 0 | { |
6339 | 0 | p = savevr (abfd, p, r); |
6340 | 0 | bfd_put_32 (abfd, BLR, p); |
6341 | 0 | return p + 4; |
6342 | 0 | } |
6343 | | |
6344 | | static bfd_byte * |
6345 | | restvr (bfd *abfd, bfd_byte *p, int r) |
6346 | 0 | { |
6347 | 0 | bfd_put_32 (abfd, LI_R12_0 + (1 << 16) - (32 - r) * 16, p); |
6348 | 0 | p = p + 4; |
6349 | 0 | bfd_put_32 (abfd, LVX_VR0_R12_R0 + (r << 21), p); |
6350 | 0 | return p + 4; |
6351 | 0 | } |
6352 | | |
6353 | | static bfd_byte * |
6354 | | restvr_tail (bfd *abfd, bfd_byte *p, int r) |
6355 | 0 | { |
6356 | 0 | p = restvr (abfd, p, r); |
6357 | 0 | bfd_put_32 (abfd, BLR, p); |
6358 | 0 | return p + 4; |
6359 | 0 | } |
6360 | | |
6361 | | #define STDU_R1_0R1 0xf8210001 |
6362 | | #define ADDI_R1_R1 0x38210000 |
6363 | | |
6364 | | /* Emit prologue of wrapper preserving regs around a call to |
6365 | | __tls_get_addr_opt. */ |
6366 | | |
6367 | | static bfd_byte * |
6368 | | tls_get_addr_prologue (bfd *obfd, bfd_byte *p, struct ppc_link_hash_table *htab) |
6369 | 0 | { |
6370 | 0 | unsigned int i; |
6371 | |
|
6372 | 0 | bfd_put_32 (obfd, MFLR_R0, p); |
6373 | 0 | p += 4; |
6374 | 0 | bfd_put_32 (obfd, STD_R0_0R1 + 16, p); |
6375 | 0 | p += 4; |
6376 | |
|
6377 | 0 | if (htab->opd_abi) |
6378 | 0 | { |
6379 | 0 | for (i = 4; i < 12; i++) |
6380 | 0 | { |
6381 | 0 | bfd_put_32 (obfd, |
6382 | 0 | STD_R0_0R1 | i << 21 | (-(13 - i) * 8 & 0xffff), p); |
6383 | 0 | p += 4; |
6384 | 0 | } |
6385 | 0 | bfd_put_32 (obfd, STDU_R1_0R1 | (-128 & 0xffff), p); |
6386 | 0 | p += 4; |
6387 | 0 | } |
6388 | 0 | else |
6389 | 0 | { |
6390 | 0 | for (i = 4; i < 12; i++) |
6391 | 0 | { |
6392 | 0 | bfd_put_32 (obfd, |
6393 | 0 | STD_R0_0R1 | i << 21 | (-(12 - i) * 8 & 0xffff), p); |
6394 | 0 | p += 4; |
6395 | 0 | } |
6396 | 0 | bfd_put_32 (obfd, STDU_R1_0R1 | (-96 & 0xffff), p); |
6397 | 0 | p += 4; |
6398 | 0 | } |
6399 | 0 | return p; |
6400 | 0 | } |
6401 | | |
6402 | | /* Emit epilogue of wrapper preserving regs around a call to |
6403 | | __tls_get_addr_opt. */ |
6404 | | |
6405 | | static bfd_byte * |
6406 | | tls_get_addr_epilogue (bfd *obfd, bfd_byte *p, struct ppc_link_hash_table *htab) |
6407 | 0 | { |
6408 | 0 | unsigned int i; |
6409 | |
|
6410 | 0 | if (htab->opd_abi) |
6411 | 0 | { |
6412 | 0 | for (i = 4; i < 12; i++) |
6413 | 0 | { |
6414 | 0 | bfd_put_32 (obfd, LD_R0_0R1 | i << 21 | (128 - (13 - i) * 8), p); |
6415 | 0 | p += 4; |
6416 | 0 | } |
6417 | 0 | bfd_put_32 (obfd, ADDI_R1_R1 | 128, p); |
6418 | 0 | p += 4; |
6419 | 0 | } |
6420 | 0 | else |
6421 | 0 | { |
6422 | 0 | for (i = 4; i < 12; i++) |
6423 | 0 | { |
6424 | 0 | bfd_put_32 (obfd, LD_R0_0R1 | i << 21 | (96 - (12 - i) * 8), p); |
6425 | 0 | p += 4; |
6426 | 0 | } |
6427 | 0 | bfd_put_32 (obfd, ADDI_R1_R1 | 96, p); |
6428 | 0 | p += 4; |
6429 | 0 | } |
6430 | 0 | bfd_put_32 (obfd, LD_R0_0R1 | 16, p); |
6431 | 0 | p += 4; |
6432 | 0 | bfd_put_32 (obfd, MTLR_R0, p); |
6433 | 0 | p += 4; |
6434 | 0 | bfd_put_32 (obfd, BLR, p); |
6435 | 0 | p += 4; |
6436 | 0 | return p; |
6437 | 0 | } |
6438 | | |
6439 | | /* Called via elf_link_hash_traverse to transfer dynamic linking |
6440 | | information on function code symbol entries to their corresponding |
6441 | | function descriptor symbol entries. Must not be called twice for |
6442 | | any given code symbol. */ |
6443 | | |
6444 | | static bool |
6445 | | func_desc_adjust (struct elf_link_hash_entry *h, void *inf) |
6446 | 0 | { |
6447 | 0 | struct bfd_link_info *info; |
6448 | 0 | struct ppc_link_hash_table *htab; |
6449 | 0 | struct ppc_link_hash_entry *fh; |
6450 | 0 | struct ppc_link_hash_entry *fdh; |
6451 | 0 | bool force_local; |
6452 | |
|
6453 | 0 | fh = ppc_elf_hash_entry (h); |
6454 | 0 | if (fh->elf.root.type == bfd_link_hash_indirect) |
6455 | 0 | return true; |
6456 | | |
6457 | 0 | if (!fh->is_func) |
6458 | 0 | return true; |
6459 | | |
6460 | 0 | if (fh->elf.root.root.string[0] != '.' |
6461 | 0 | || fh->elf.root.root.string[1] == '\0') |
6462 | 0 | return true; |
6463 | | |
6464 | 0 | info = inf; |
6465 | 0 | htab = ppc_hash_table (info); |
6466 | 0 | if (htab == NULL) |
6467 | 0 | return false; |
6468 | | |
6469 | | /* Find the corresponding function descriptor symbol. */ |
6470 | 0 | fdh = lookup_fdh (fh, htab); |
6471 | | |
6472 | | /* Resolve undefined references to dot-symbols as the value |
6473 | | in the function descriptor, if we have one in a regular object. |
6474 | | This is to satisfy cases like ".quad .foo". Calls to functions |
6475 | | in dynamic objects are handled elsewhere. */ |
6476 | 0 | if ((fh->elf.root.type == bfd_link_hash_undefined |
6477 | 0 | || fh->elf.root.type == bfd_link_hash_undefweak) |
6478 | 0 | && (fdh->elf.root.type == bfd_link_hash_defined |
6479 | 0 | || fdh->elf.root.type == bfd_link_hash_defweak) |
6480 | 0 | && get_opd_info (fdh->elf.root.u.def.section) != NULL |
6481 | 0 | && opd_entry_value (fdh->elf.root.u.def.section, |
6482 | 0 | fdh->elf.root.u.def.value, |
6483 | 0 | &fh->elf.root.u.def.section, |
6484 | 0 | &fh->elf.root.u.def.value, false) != (bfd_vma) -1) |
6485 | 0 | { |
6486 | 0 | fh->elf.root.type = fdh->elf.root.type; |
6487 | 0 | fh->elf.forced_local = 1; |
6488 | 0 | fh->elf.def_regular = fdh->elf.def_regular; |
6489 | 0 | fh->elf.def_dynamic = fdh->elf.def_dynamic; |
6490 | 0 | } |
6491 | |
|
6492 | 0 | if (!fh->elf.dynamic) |
6493 | 0 | { |
6494 | 0 | struct plt_entry *ent; |
6495 | |
|
6496 | 0 | for (ent = fh->elf.plt.plist; ent != NULL; ent = ent->next) |
6497 | 0 | if (ent->plt.refcount > 0) |
6498 | 0 | break; |
6499 | 0 | if (ent == NULL) |
6500 | 0 | { |
6501 | 0 | if (fdh != NULL && fdh->fake) |
6502 | 0 | _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, true); |
6503 | 0 | return true; |
6504 | 0 | } |
6505 | 0 | } |
6506 | | |
6507 | | /* Create a descriptor as undefined if necessary. */ |
6508 | 0 | if (fdh == NULL |
6509 | 0 | && !bfd_link_executable (info) |
6510 | 0 | && (fh->elf.root.type == bfd_link_hash_undefined |
6511 | 0 | || fh->elf.root.type == bfd_link_hash_undefweak)) |
6512 | 0 | { |
6513 | 0 | fdh = make_fdh (info, fh); |
6514 | 0 | if (fdh == NULL) |
6515 | 0 | return false; |
6516 | 0 | } |
6517 | | |
6518 | | /* We can't support overriding of symbols on a fake descriptor. */ |
6519 | 0 | if (fdh != NULL |
6520 | 0 | && fdh->fake |
6521 | 0 | && (fh->elf.root.type == bfd_link_hash_defined |
6522 | 0 | || fh->elf.root.type == bfd_link_hash_defweak)) |
6523 | 0 | _bfd_elf_link_hash_hide_symbol (info, &fdh->elf, true); |
6524 | | |
6525 | | /* Transfer dynamic linking information to the function descriptor. */ |
6526 | 0 | if (fdh != NULL) |
6527 | 0 | { |
6528 | 0 | fdh->elf.ref_regular |= fh->elf.ref_regular; |
6529 | 0 | fdh->elf.ref_dynamic |= fh->elf.ref_dynamic; |
6530 | 0 | fdh->elf.ref_regular_nonweak |= fh->elf.ref_regular_nonweak; |
6531 | 0 | fdh->elf.non_got_ref |= fh->elf.non_got_ref; |
6532 | 0 | fdh->elf.dynamic |= fh->elf.dynamic; |
6533 | 0 | fdh->elf.needs_plt |= (fh->elf.needs_plt |
6534 | 0 | || fh->elf.type == STT_FUNC |
6535 | 0 | || fh->elf.type == STT_GNU_IFUNC); |
6536 | 0 | move_plt_plist (fh, fdh); |
6537 | |
|
6538 | 0 | if (!fdh->elf.forced_local |
6539 | 0 | && fh->elf.dynindx != -1) |
6540 | 0 | if (!bfd_elf_link_record_dynamic_symbol (info, &fdh->elf)) |
6541 | 0 | return false; |
6542 | 0 | } |
6543 | | |
6544 | | /* Now that the info is on the function descriptor, clear the |
6545 | | function code sym info. Any function code syms for which we |
6546 | | don't have a definition in a regular file, we force local. |
6547 | | This prevents a shared library from exporting syms that have |
6548 | | been imported from another library. Function code syms that |
6549 | | are really in the library we must leave global to prevent the |
6550 | | linker dragging in a definition from a static library. */ |
6551 | 0 | force_local = (!fh->elf.def_regular |
6552 | 0 | || fdh == NULL |
6553 | 0 | || !fdh->elf.def_regular |
6554 | 0 | || fdh->elf.forced_local); |
6555 | 0 | _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
6556 | |
|
6557 | 0 | return true; |
6558 | 0 | } |
6559 | | |
6560 | | static const struct sfpr_def_parms save_res_funcs[] = |
6561 | | { |
6562 | | { "_savegpr0_", 14, 31, savegpr0, savegpr0_tail }, |
6563 | | { "_restgpr0_", 14, 29, restgpr0, restgpr0_tail }, |
6564 | | { "_restgpr0_", 30, 31, restgpr0, restgpr0_tail }, |
6565 | | { "_savegpr1_", 14, 31, savegpr1, savegpr1_tail }, |
6566 | | { "_restgpr1_", 14, 31, restgpr1, restgpr1_tail }, |
6567 | | { "_savefpr_", 14, 31, savefpr, savefpr0_tail }, |
6568 | | { "_restfpr_", 14, 29, restfpr, restfpr0_tail }, |
6569 | | { "_restfpr_", 30, 31, restfpr, restfpr0_tail }, |
6570 | | { "._savef", 14, 31, savefpr, savefpr1_tail }, |
6571 | | { "._restf", 14, 31, restfpr, restfpr1_tail }, |
6572 | | { "_savevr_", 20, 31, savevr, savevr_tail }, |
6573 | | { "_restvr_", 20, 31, restvr, restvr_tail } |
6574 | | }; |
6575 | | |
6576 | | /* Called near the start of bfd_elf_size_dynamic_sections. We use |
6577 | | this hook to a) run the edit functions in this file, b) provide |
6578 | | some gcc support functions, and c) transfer dynamic linking |
6579 | | information gathered so far on function code symbol entries, to |
6580 | | their corresponding function descriptor symbol entries. */ |
6581 | | |
6582 | | static bool |
6583 | | ppc64_elf_edit (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) |
6584 | 0 | { |
6585 | 0 | struct ppc_link_hash_table *htab; |
6586 | |
|
6587 | 0 | htab = ppc_hash_table (info); |
6588 | 0 | if (htab == NULL) |
6589 | 0 | return false; |
6590 | | |
6591 | | /* Call back into the linker, which then runs the edit functions. */ |
6592 | 0 | htab->params->edit (); |
6593 | | |
6594 | | /* Provide any missing _save* and _rest* functions. */ |
6595 | 0 | if (htab->sfpr != NULL) |
6596 | 0 | { |
6597 | 0 | unsigned int i; |
6598 | |
|
6599 | 0 | htab->sfpr->size = 0; |
6600 | 0 | for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) |
6601 | 0 | if (!sfpr_define (info, &save_res_funcs[i], NULL)) |
6602 | 0 | return false; |
6603 | 0 | if (htab->sfpr->size == 0) |
6604 | 0 | htab->sfpr->flags |= SEC_EXCLUDE; |
6605 | 0 | } |
6606 | | |
6607 | 0 | if (bfd_link_relocatable (info)) |
6608 | 0 | return true; |
6609 | | |
6610 | 0 | if (htab->elf.hgot != NULL) |
6611 | 0 | { |
6612 | 0 | _bfd_elf_link_hash_hide_symbol (info, htab->elf.hgot, true); |
6613 | | /* Make .TOC. defined so as to prevent it being made dynamic. |
6614 | | The wrong value here is fixed later in ppc64_elf_set_toc. */ |
6615 | 0 | if (!htab->elf.hgot->def_regular |
6616 | 0 | || htab->elf.hgot->root.type != bfd_link_hash_defined) |
6617 | 0 | { |
6618 | 0 | htab->elf.hgot->root.type = bfd_link_hash_defined; |
6619 | 0 | htab->elf.hgot->root.u.def.value = 0; |
6620 | 0 | htab->elf.hgot->root.u.def.section = bfd_abs_section_ptr; |
6621 | 0 | htab->elf.hgot->def_regular = 1; |
6622 | 0 | htab->elf.hgot->root.linker_def = 1; |
6623 | 0 | } |
6624 | 0 | htab->elf.hgot->type = STT_OBJECT; |
6625 | 0 | htab->elf.hgot->other |
6626 | 0 | = (htab->elf.hgot->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; |
6627 | 0 | } |
6628 | |
|
6629 | 0 | return true; |
6630 | 0 | } |
6631 | | |
6632 | | /* Return true if we have dynamic relocs against H or any of its weak |
6633 | | aliases, that apply to read-only sections. Cannot be used after |
6634 | | size_dynamic_sections. */ |
6635 | | |
6636 | | static bool |
6637 | | alias_readonly_dynrelocs (struct elf_link_hash_entry *h) |
6638 | 0 | { |
6639 | 0 | struct ppc_link_hash_entry *eh = ppc_elf_hash_entry (h); |
6640 | 0 | do |
6641 | 0 | { |
6642 | 0 | if (_bfd_elf_readonly_dynrelocs (&eh->elf)) |
6643 | 0 | return true; |
6644 | 0 | eh = ppc_elf_hash_entry (eh->elf.u.alias); |
6645 | 0 | } |
6646 | 0 | while (eh != NULL && &eh->elf != h); |
6647 | | |
6648 | 0 | return false; |
6649 | 0 | } |
6650 | | |
6651 | | /* Return whether EH has pc-relative dynamic relocs. */ |
6652 | | |
6653 | | static bool |
6654 | | pc_dynrelocs (struct ppc_link_hash_entry *eh) |
6655 | 0 | { |
6656 | 0 | struct ppc_dyn_relocs *p; |
6657 | |
|
6658 | 0 | for (p = (struct ppc_dyn_relocs *) eh->elf.dyn_relocs; p != NULL; p = p->next) |
6659 | 0 | if (p->pc_count != 0) |
6660 | 0 | return true; |
6661 | 0 | return false; |
6662 | 0 | } |
6663 | | |
6664 | | /* Return true if a global entry stub will be created for H. Valid |
6665 | | for ELFv2 before plt entries have been allocated. */ |
6666 | | |
6667 | | static bool |
6668 | | global_entry_stub (struct elf_link_hash_entry *h) |
6669 | 0 | { |
6670 | 0 | struct plt_entry *pent; |
6671 | |
|
6672 | 0 | if (!h->pointer_equality_needed |
6673 | 0 | || h->def_regular) |
6674 | 0 | return false; |
6675 | | |
6676 | 0 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
6677 | 0 | if (pent->plt.refcount > 0 |
6678 | 0 | && pent->addend == 0) |
6679 | 0 | return true; |
6680 | | |
6681 | 0 | return false; |
6682 | 0 | } |
6683 | | |
6684 | | /* Adjust a symbol defined by a dynamic object and referenced by a |
6685 | | regular object. The current definition is in some section of the |
6686 | | dynamic object, but we're not including those sections. We have to |
6687 | | change the definition to something the rest of the link can |
6688 | | understand. */ |
6689 | | |
6690 | | static bool |
6691 | | ppc64_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
6692 | | struct elf_link_hash_entry *h) |
6693 | 0 | { |
6694 | 0 | struct ppc_link_hash_table *htab; |
6695 | 0 | asection *s, *srel; |
6696 | |
|
6697 | 0 | htab = ppc_hash_table (info); |
6698 | 0 | if (htab == NULL) |
6699 | 0 | return false; |
6700 | | |
6701 | | /* Deal with function syms. */ |
6702 | 0 | if (h->type == STT_FUNC |
6703 | 0 | || h->type == STT_GNU_IFUNC |
6704 | 0 | || h->needs_plt) |
6705 | 0 | { |
6706 | 0 | bool local = (ppc_elf_hash_entry (h)->save_res |
6707 | 0 | || SYMBOL_CALLS_LOCAL (info, h) |
6708 | 0 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
6709 | | /* Discard dyn_relocs when non-pic if we've decided that a |
6710 | | function symbol is local and not an ifunc. We keep dynamic |
6711 | | relocs for ifuncs when local rather than always emitting a |
6712 | | plt call stub for them and defining the symbol on the call |
6713 | | stub. We can't do that for ELFv1 anyway (a function symbol |
6714 | | is defined on a descriptor, not code) and it can be faster at |
6715 | | run-time due to not needing to bounce through a stub. The |
6716 | | dyn_relocs for ifuncs will be applied even in a static |
6717 | | executable. */ |
6718 | 0 | if (!bfd_link_pic (info) |
6719 | 0 | && h->type != STT_GNU_IFUNC |
6720 | 0 | && local) |
6721 | 0 | h->dyn_relocs = NULL; |
6722 | | |
6723 | | /* Clear procedure linkage table information for any symbol that |
6724 | | won't need a .plt entry. */ |
6725 | 0 | struct plt_entry *ent; |
6726 | 0 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
6727 | 0 | if (ent->plt.refcount > 0) |
6728 | 0 | break; |
6729 | 0 | if (ent == NULL |
6730 | 0 | || (h->type != STT_GNU_IFUNC |
6731 | 0 | && local |
6732 | 0 | && (htab->can_convert_all_inline_plt |
6733 | 0 | || (ppc_elf_hash_entry (h)->tls_mask |
6734 | 0 | & (TLS_TLS | PLT_KEEP)) != PLT_KEEP))) |
6735 | 0 | { |
6736 | 0 | h->plt.plist = NULL; |
6737 | 0 | h->needs_plt = 0; |
6738 | 0 | h->pointer_equality_needed = 0; |
6739 | 0 | } |
6740 | 0 | else if (abiversion (info->output_bfd) >= 2) |
6741 | 0 | { |
6742 | | /* Taking a function's address in a read/write section |
6743 | | doesn't require us to define the function symbol in the |
6744 | | executable on a global entry stub. A dynamic reloc can |
6745 | | be used instead. The reason we prefer a few more dynamic |
6746 | | relocs is that calling via a global entry stub costs a |
6747 | | few more instructions, and pointer_equality_needed causes |
6748 | | extra work in ld.so when resolving these symbols. */ |
6749 | 0 | if (global_entry_stub (h)) |
6750 | 0 | { |
6751 | 0 | if (!_bfd_elf_readonly_dynrelocs (h)) |
6752 | 0 | { |
6753 | 0 | h->pointer_equality_needed = 0; |
6754 | | /* If we haven't seen a branch reloc and the symbol |
6755 | | isn't an ifunc then we don't need a plt entry. */ |
6756 | 0 | if (!h->needs_plt) |
6757 | 0 | h->plt.plist = NULL; |
6758 | 0 | } |
6759 | 0 | else if (!bfd_link_pic (info)) |
6760 | | /* We are going to be defining the function symbol on the |
6761 | | plt stub, so no dyn_relocs needed when non-pic. */ |
6762 | 0 | h->dyn_relocs = NULL; |
6763 | 0 | } |
6764 | | |
6765 | | /* ELFv2 function symbols can't have copy relocs. */ |
6766 | 0 | return true; |
6767 | 0 | } |
6768 | 0 | else if (!h->needs_plt |
6769 | 0 | && !_bfd_elf_readonly_dynrelocs (h)) |
6770 | 0 | { |
6771 | | /* If we haven't seen a branch reloc and the symbol isn't an |
6772 | | ifunc then we don't need a plt entry. */ |
6773 | 0 | h->plt.plist = NULL; |
6774 | 0 | h->pointer_equality_needed = 0; |
6775 | 0 | return true; |
6776 | 0 | } |
6777 | 0 | } |
6778 | 0 | else |
6779 | 0 | h->plt.plist = NULL; |
6780 | | |
6781 | | /* If this is a weak symbol, and there is a real definition, the |
6782 | | processor independent code will have arranged for us to see the |
6783 | | real definition first, and we can just use the same value. */ |
6784 | 0 | if (h->is_weakalias) |
6785 | 0 | { |
6786 | 0 | struct elf_link_hash_entry *def = weakdef (h); |
6787 | 0 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
6788 | 0 | h->root.u.def.section = def->root.u.def.section; |
6789 | 0 | h->root.u.def.value = def->root.u.def.value; |
6790 | 0 | if (def->root.u.def.section == htab->elf.sdynbss |
6791 | 0 | || def->root.u.def.section == htab->elf.sdynrelro) |
6792 | 0 | h->dyn_relocs = NULL; |
6793 | 0 | return true; |
6794 | 0 | } |
6795 | | |
6796 | | /* If we are creating a shared library, we must presume that the |
6797 | | only references to the symbol are via the global offset table. |
6798 | | For such cases we need not do anything here; the relocations will |
6799 | | be handled correctly by relocate_section. */ |
6800 | 0 | if (!bfd_link_executable (info)) |
6801 | 0 | return true; |
6802 | | |
6803 | | /* If there are no references to this symbol that do not use the |
6804 | | GOT, we don't need to generate a copy reloc. */ |
6805 | 0 | if (!h->non_got_ref) |
6806 | 0 | return true; |
6807 | | |
6808 | | /* Don't generate a copy reloc for symbols defined in the executable. */ |
6809 | 0 | if (!h->def_dynamic || !h->ref_regular || h->def_regular |
6810 | | |
6811 | | /* If -z nocopyreloc was given, don't generate them either. */ |
6812 | 0 | || info->nocopyreloc |
6813 | | |
6814 | | /* If we don't find any dynamic relocs in read-only sections, then |
6815 | | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
6816 | 0 | || (ELIMINATE_COPY_RELOCS |
6817 | 0 | && !h->needs_copy |
6818 | 0 | && !alias_readonly_dynrelocs (h)) |
6819 | | |
6820 | | /* Protected variables do not work with .dynbss. The copy in |
6821 | | .dynbss won't be used by the shared library with the protected |
6822 | | definition for the variable. Text relocations are preferable |
6823 | | to an incorrect program. */ |
6824 | 0 | || h->protected_def) |
6825 | 0 | return true; |
6826 | | |
6827 | 0 | if (h->type == STT_FUNC |
6828 | 0 | || h->type == STT_GNU_IFUNC) |
6829 | 0 | { |
6830 | | /* .dynbss copies of function symbols only work if we have |
6831 | | ELFv1 dot-symbols. ELFv1 compilers since 2004 default to not |
6832 | | use dot-symbols and set the function symbol size to the text |
6833 | | size of the function rather than the size of the descriptor. |
6834 | | That's wrong for copying a descriptor. */ |
6835 | 0 | if (ppc_elf_hash_entry (h)->oh == NULL |
6836 | 0 | || !(h->size == 24 || h->size == 16)) |
6837 | 0 | return true; |
6838 | | |
6839 | | /* We should never get here, but unfortunately there are old |
6840 | | versions of gcc (circa gcc-3.2) that improperly for the |
6841 | | ELFv1 ABI put initialized function pointers, vtable refs and |
6842 | | suchlike in read-only sections. Allow them to proceed, but |
6843 | | warn that this might break at runtime. */ |
6844 | 0 | info->callbacks->einfo |
6845 | 0 | (_("%P: copy reloc against `%pT' requires lazy plt linking; " |
6846 | 0 | "avoid setting LD_BIND_NOW=1 or upgrade gcc\n"), |
6847 | 0 | h->root.root.string); |
6848 | 0 | } |
6849 | | |
6850 | | /* This is a reference to a symbol defined by a dynamic object which |
6851 | | is not a function. */ |
6852 | | |
6853 | | /* We must allocate the symbol in our .dynbss section, which will |
6854 | | become part of the .bss section of the executable. There will be |
6855 | | an entry for this symbol in the .dynsym section. The dynamic |
6856 | | object will contain position independent code, so all references |
6857 | | from the dynamic object to this symbol will go through the global |
6858 | | offset table. The dynamic linker will use the .dynsym entry to |
6859 | | determine the address it must put in the global offset table, so |
6860 | | both the dynamic object and the regular object will refer to the |
6861 | | same memory location for the variable. */ |
6862 | 0 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
6863 | 0 | { |
6864 | 0 | s = htab->elf.sdynrelro; |
6865 | 0 | srel = htab->elf.sreldynrelro; |
6866 | 0 | } |
6867 | 0 | else |
6868 | 0 | { |
6869 | 0 | s = htab->elf.sdynbss; |
6870 | 0 | srel = htab->elf.srelbss; |
6871 | 0 | } |
6872 | 0 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
6873 | 0 | { |
6874 | | /* We must generate a R_PPC64_COPY reloc to tell the dynamic |
6875 | | linker to copy the initial value out of the dynamic object |
6876 | | and into the runtime process image. */ |
6877 | 0 | srel->size += sizeof (Elf64_External_Rela); |
6878 | 0 | h->needs_copy = 1; |
6879 | 0 | } |
6880 | | |
6881 | | /* We no longer want dyn_relocs. */ |
6882 | 0 | h->dyn_relocs = NULL; |
6883 | 0 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
6884 | 0 | } |
6885 | | |
6886 | | /* If given a function descriptor symbol, hide both the function code |
6887 | | sym and the descriptor. */ |
6888 | | static void |
6889 | | ppc64_elf_hide_symbol (struct bfd_link_info *info, |
6890 | | struct elf_link_hash_entry *h, |
6891 | | bool force_local) |
6892 | 0 | { |
6893 | 0 | struct ppc_link_hash_entry *eh; |
6894 | 0 | _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
6895 | |
|
6896 | 0 | if (ppc_hash_table (info) == NULL) |
6897 | 0 | return; |
6898 | | |
6899 | 0 | eh = ppc_elf_hash_entry (h); |
6900 | 0 | if (eh->is_func_descriptor) |
6901 | 0 | { |
6902 | 0 | struct ppc_link_hash_entry *fh = eh->oh; |
6903 | |
|
6904 | 0 | if (fh == NULL) |
6905 | 0 | { |
6906 | 0 | const char *p, *q; |
6907 | 0 | struct elf_link_hash_table *htab = elf_hash_table (info); |
6908 | 0 | char save; |
6909 | | |
6910 | | /* We aren't supposed to use alloca in BFD because on |
6911 | | systems which do not have alloca the version in libiberty |
6912 | | calls xmalloc, which might cause the program to crash |
6913 | | when it runs out of memory. This function doesn't have a |
6914 | | return status, so there's no way to gracefully return an |
6915 | | error. So cheat. We know that string[-1] can be safely |
6916 | | accessed; It's either a string in an ELF string table, |
6917 | | or allocated in an objalloc structure. */ |
6918 | |
|
6919 | 0 | p = eh->elf.root.root.string - 1; |
6920 | 0 | save = *p; |
6921 | 0 | *(char *) p = '.'; |
6922 | 0 | fh = ppc_elf_hash_entry (elf_link_hash_lookup (htab, p, false, |
6923 | 0 | false, false)); |
6924 | 0 | *(char *) p = save; |
6925 | | |
6926 | | /* Unfortunately, if it so happens that the string we were |
6927 | | looking for was allocated immediately before this string, |
6928 | | then we overwrote the string terminator. That's the only |
6929 | | reason the lookup should fail. */ |
6930 | 0 | if (fh == NULL) |
6931 | 0 | { |
6932 | 0 | q = eh->elf.root.root.string + strlen (eh->elf.root.root.string); |
6933 | 0 | while (q >= eh->elf.root.root.string && *q == *p) |
6934 | 0 | --q, --p; |
6935 | 0 | if (q < eh->elf.root.root.string && *p == '.') |
6936 | 0 | fh = ppc_elf_hash_entry (elf_link_hash_lookup (htab, p, false, |
6937 | 0 | false, false)); |
6938 | 0 | } |
6939 | 0 | if (fh != NULL) |
6940 | 0 | { |
6941 | 0 | eh->oh = fh; |
6942 | 0 | fh->oh = eh; |
6943 | 0 | } |
6944 | 0 | } |
6945 | 0 | if (fh != NULL) |
6946 | 0 | _bfd_elf_link_hash_hide_symbol (info, &fh->elf, force_local); |
6947 | 0 | } |
6948 | 0 | } |
6949 | | |
6950 | | static bool |
6951 | | get_sym_h (struct elf_link_hash_entry **hp, |
6952 | | Elf_Internal_Sym **symp, |
6953 | | asection **symsecp, |
6954 | | unsigned char **tls_maskp, |
6955 | | Elf_Internal_Sym **locsymsp, |
6956 | | unsigned long r_symndx, |
6957 | | bfd *ibfd) |
6958 | 0 | { |
6959 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
6960 | |
|
6961 | 0 | if (r_symndx >= symtab_hdr->sh_info) |
6962 | 0 | { |
6963 | 0 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
6964 | 0 | struct elf_link_hash_entry *h; |
6965 | |
|
6966 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
6967 | 0 | h = elf_follow_link (h); |
6968 | |
|
6969 | 0 | if (hp != NULL) |
6970 | 0 | *hp = h; |
6971 | |
|
6972 | 0 | if (symp != NULL) |
6973 | 0 | *symp = NULL; |
6974 | |
|
6975 | 0 | if (symsecp != NULL) |
6976 | 0 | { |
6977 | 0 | asection *symsec = NULL; |
6978 | 0 | if (h->root.type == bfd_link_hash_defined |
6979 | 0 | || h->root.type == bfd_link_hash_defweak) |
6980 | 0 | symsec = h->root.u.def.section; |
6981 | 0 | *symsecp = symsec; |
6982 | 0 | } |
6983 | |
|
6984 | 0 | if (tls_maskp != NULL) |
6985 | 0 | *tls_maskp = &ppc_elf_hash_entry (h)->tls_mask; |
6986 | 0 | } |
6987 | 0 | else |
6988 | 0 | { |
6989 | 0 | Elf_Internal_Sym *sym; |
6990 | 0 | Elf_Internal_Sym *locsyms = *locsymsp; |
6991 | |
|
6992 | 0 | if (locsyms == NULL) |
6993 | 0 | { |
6994 | 0 | locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
6995 | 0 | if (locsyms == NULL) |
6996 | 0 | locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
6997 | 0 | symtab_hdr->sh_info, |
6998 | 0 | 0, NULL, NULL, NULL); |
6999 | 0 | if (locsyms == NULL) |
7000 | 0 | return false; |
7001 | 0 | *locsymsp = locsyms; |
7002 | 0 | } |
7003 | 0 | sym = locsyms + r_symndx; |
7004 | |
|
7005 | 0 | if (hp != NULL) |
7006 | 0 | *hp = NULL; |
7007 | |
|
7008 | 0 | if (symp != NULL) |
7009 | 0 | *symp = sym; |
7010 | |
|
7011 | 0 | if (symsecp != NULL) |
7012 | 0 | *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
7013 | |
|
7014 | 0 | if (tls_maskp != NULL) |
7015 | 0 | { |
7016 | 0 | struct got_entry **lgot_ents; |
7017 | 0 | unsigned char *tls_mask; |
7018 | |
|
7019 | 0 | tls_mask = NULL; |
7020 | 0 | lgot_ents = elf_local_got_ents (ibfd); |
7021 | 0 | if (lgot_ents != NULL) |
7022 | 0 | { |
7023 | 0 | struct plt_entry **local_plt = (struct plt_entry **) |
7024 | 0 | (lgot_ents + symtab_hdr->sh_info); |
7025 | 0 | unsigned char *lgot_masks = (unsigned char *) |
7026 | 0 | (local_plt + symtab_hdr->sh_info); |
7027 | 0 | tls_mask = &lgot_masks[r_symndx]; |
7028 | 0 | } |
7029 | 0 | *tls_maskp = tls_mask; |
7030 | 0 | } |
7031 | 0 | } |
7032 | 0 | return true; |
7033 | 0 | } |
7034 | | |
7035 | | /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on |
7036 | | error, 2 on a toc GD type suitable for optimization, 3 on a toc LD |
7037 | | type suitable for optimization, and 1 otherwise. */ |
7038 | | |
7039 | | static int |
7040 | | get_tls_mask (unsigned char **tls_maskp, |
7041 | | unsigned long *toc_symndx, |
7042 | | bfd_vma *toc_addend, |
7043 | | Elf_Internal_Sym **locsymsp, |
7044 | | const Elf_Internal_Rela *rel, |
7045 | | bfd *ibfd) |
7046 | 0 | { |
7047 | 0 | unsigned long r_symndx; |
7048 | 0 | int next_r; |
7049 | 0 | struct elf_link_hash_entry *h; |
7050 | 0 | Elf_Internal_Sym *sym; |
7051 | 0 | asection *sec; |
7052 | 0 | bfd_vma off; |
7053 | |
|
7054 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
7055 | 0 | if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
7056 | 0 | return 0; |
7057 | | |
7058 | 0 | if ((*tls_maskp != NULL |
7059 | 0 | && (**tls_maskp & TLS_TLS) != 0 |
7060 | 0 | && **tls_maskp != (TLS_TLS | TLS_MARK)) |
7061 | 0 | || sec == NULL |
7062 | 0 | || ppc64_elf_section_data (sec) == NULL |
7063 | 0 | || ppc64_elf_section_data (sec)->sec_type != sec_toc) |
7064 | 0 | return 1; |
7065 | | |
7066 | | /* Look inside a TOC section too. */ |
7067 | 0 | if (h != NULL) |
7068 | 0 | { |
7069 | 0 | BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
7070 | 0 | off = h->root.u.def.value; |
7071 | 0 | } |
7072 | 0 | else |
7073 | 0 | off = sym->st_value; |
7074 | 0 | off += rel->r_addend; |
7075 | 0 | BFD_ASSERT (off % 8 == 0); |
7076 | 0 | r_symndx = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8]; |
7077 | 0 | next_r = ppc64_elf_section_data (sec)->u.toc.symndx[off / 8 + 1]; |
7078 | 0 | if (toc_symndx != NULL) |
7079 | 0 | *toc_symndx = r_symndx; |
7080 | 0 | if (toc_addend != NULL) |
7081 | 0 | *toc_addend = ppc64_elf_section_data (sec)->u.toc.add[off / 8]; |
7082 | 0 | if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
7083 | 0 | return 0; |
7084 | 0 | if ((h == NULL || is_static_defined (h)) |
7085 | 0 | && (next_r == -1 || next_r == -2)) |
7086 | 0 | return 1 - next_r; |
7087 | 0 | return 1; |
7088 | 0 | } |
7089 | | |
7090 | | /* Find (or create) an entry in the tocsave hash table. */ |
7091 | | |
7092 | | static struct tocsave_entry * |
7093 | | tocsave_find (struct ppc_link_hash_table *htab, |
7094 | | enum insert_option insert, |
7095 | | Elf_Internal_Sym **local_syms, |
7096 | | const Elf_Internal_Rela *irela, |
7097 | | bfd *ibfd) |
7098 | 0 | { |
7099 | 0 | unsigned long r_indx; |
7100 | 0 | struct elf_link_hash_entry *h; |
7101 | 0 | Elf_Internal_Sym *sym; |
7102 | 0 | struct tocsave_entry ent, *p; |
7103 | 0 | hashval_t hash; |
7104 | 0 | struct tocsave_entry **slot; |
7105 | |
|
7106 | 0 | r_indx = ELF64_R_SYM (irela->r_info); |
7107 | 0 | if (!get_sym_h (&h, &sym, &ent.sec, NULL, local_syms, r_indx, ibfd)) |
7108 | 0 | return NULL; |
7109 | 0 | if (ent.sec == NULL || ent.sec->output_section == NULL) |
7110 | 0 | { |
7111 | 0 | _bfd_error_handler |
7112 | 0 | (_("%pB: undefined symbol on R_PPC64_TOCSAVE relocation"), ibfd); |
7113 | 0 | return NULL; |
7114 | 0 | } |
7115 | | |
7116 | 0 | if (h != NULL) |
7117 | 0 | ent.offset = h->root.u.def.value; |
7118 | 0 | else |
7119 | 0 | ent.offset = sym->st_value; |
7120 | 0 | ent.offset += irela->r_addend; |
7121 | |
|
7122 | 0 | hash = tocsave_htab_hash (&ent); |
7123 | 0 | slot = ((struct tocsave_entry **) |
7124 | 0 | htab_find_slot_with_hash (htab->tocsave_htab, &ent, hash, insert)); |
7125 | 0 | if (slot == NULL) |
7126 | 0 | return NULL; |
7127 | | |
7128 | 0 | if (*slot == NULL) |
7129 | 0 | { |
7130 | 0 | p = (struct tocsave_entry *) bfd_alloc (ibfd, sizeof (*p)); |
7131 | 0 | if (p == NULL) |
7132 | 0 | return NULL; |
7133 | 0 | *p = ent; |
7134 | 0 | *slot = p; |
7135 | 0 | } |
7136 | 0 | return *slot; |
7137 | 0 | } |
7138 | | |
7139 | | /* Adjust all global syms defined in opd sections. In gcc generated |
7140 | | code for the old ABI, these will already have been done. */ |
7141 | | |
7142 | | static bool |
7143 | | adjust_opd_syms (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) |
7144 | 0 | { |
7145 | 0 | struct ppc_link_hash_entry *eh; |
7146 | 0 | asection *sym_sec; |
7147 | 0 | struct _opd_sec_data *opd; |
7148 | |
|
7149 | 0 | if (h->root.type == bfd_link_hash_indirect) |
7150 | 0 | return true; |
7151 | | |
7152 | 0 | if (h->root.type != bfd_link_hash_defined |
7153 | 0 | && h->root.type != bfd_link_hash_defweak) |
7154 | 0 | return true; |
7155 | | |
7156 | 0 | eh = ppc_elf_hash_entry (h); |
7157 | 0 | if (eh->adjust_done) |
7158 | 0 | return true; |
7159 | | |
7160 | 0 | sym_sec = eh->elf.root.u.def.section; |
7161 | 0 | opd = get_opd_info (sym_sec); |
7162 | 0 | if (opd != NULL && opd->adjust != NULL) |
7163 | 0 | { |
7164 | 0 | long adjust = opd->adjust[OPD_NDX (eh->elf.root.u.def.value)]; |
7165 | 0 | if (adjust == -1) |
7166 | 0 | { |
7167 | | /* This entry has been deleted. */ |
7168 | 0 | asection *dsec = ppc64_elf_tdata (sym_sec->owner)->deleted_section; |
7169 | 0 | if (dsec == NULL) |
7170 | 0 | { |
7171 | 0 | for (dsec = sym_sec->owner->sections; dsec; dsec = dsec->next) |
7172 | 0 | if (discarded_section (dsec)) |
7173 | 0 | { |
7174 | 0 | ppc64_elf_tdata (sym_sec->owner)->deleted_section = dsec; |
7175 | 0 | break; |
7176 | 0 | } |
7177 | 0 | } |
7178 | 0 | eh->elf.root.u.def.value = 0; |
7179 | 0 | eh->elf.root.u.def.section = dsec; |
7180 | 0 | } |
7181 | 0 | else |
7182 | 0 | eh->elf.root.u.def.value += adjust; |
7183 | 0 | eh->adjust_done = 1; |
7184 | 0 | } |
7185 | 0 | return true; |
7186 | 0 | } |
7187 | | |
7188 | | /* Handles decrementing dynamic reloc counts for the reloc specified by |
7189 | | R_INFO in section SEC. If LOCAL_SYMS is NULL, then H and SYM |
7190 | | have already been determined. */ |
7191 | | |
7192 | | static bool |
7193 | | dec_dynrel_count (const Elf_Internal_Rela *rel, |
7194 | | asection *sec, |
7195 | | struct bfd_link_info *info, |
7196 | | Elf_Internal_Sym **local_syms, |
7197 | | struct elf_link_hash_entry *h, |
7198 | | Elf_Internal_Sym *sym) |
7199 | 0 | { |
7200 | 0 | enum elf_ppc64_reloc_type r_type; |
7201 | 0 | asection *sym_sec = NULL; |
7202 | | |
7203 | | /* Can this reloc be dynamic? This switch, and later tests here |
7204 | | should be kept in sync with the code in check_relocs. */ |
7205 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
7206 | 0 | switch (r_type) |
7207 | 0 | { |
7208 | 0 | default: |
7209 | 0 | return true; |
7210 | | |
7211 | 0 | case R_PPC64_TOC16: |
7212 | 0 | case R_PPC64_TOC16_DS: |
7213 | 0 | case R_PPC64_TOC16_LO: |
7214 | 0 | case R_PPC64_TOC16_HI: |
7215 | 0 | case R_PPC64_TOC16_HA: |
7216 | 0 | case R_PPC64_TOC16_LO_DS: |
7217 | 0 | if (h == NULL) |
7218 | 0 | return true; |
7219 | 0 | break; |
7220 | | |
7221 | 0 | case R_PPC64_TPREL16: |
7222 | 0 | case R_PPC64_TPREL16_LO: |
7223 | 0 | case R_PPC64_TPREL16_HI: |
7224 | 0 | case R_PPC64_TPREL16_HA: |
7225 | 0 | case R_PPC64_TPREL16_DS: |
7226 | 0 | case R_PPC64_TPREL16_LO_DS: |
7227 | 0 | case R_PPC64_TPREL16_HIGH: |
7228 | 0 | case R_PPC64_TPREL16_HIGHA: |
7229 | 0 | case R_PPC64_TPREL16_HIGHER: |
7230 | 0 | case R_PPC64_TPREL16_HIGHERA: |
7231 | 0 | case R_PPC64_TPREL16_HIGHEST: |
7232 | 0 | case R_PPC64_TPREL16_HIGHESTA: |
7233 | 0 | case R_PPC64_TPREL64: |
7234 | 0 | case R_PPC64_TPREL34: |
7235 | 0 | case R_PPC64_DTPMOD64: |
7236 | 0 | case R_PPC64_DTPREL64: |
7237 | 0 | case R_PPC64_ADDR64: |
7238 | 0 | case R_PPC64_REL30: |
7239 | 0 | case R_PPC64_REL32: |
7240 | 0 | case R_PPC64_REL64: |
7241 | 0 | case R_PPC64_ADDR14: |
7242 | 0 | case R_PPC64_ADDR14_BRNTAKEN: |
7243 | 0 | case R_PPC64_ADDR14_BRTAKEN: |
7244 | 0 | case R_PPC64_ADDR16: |
7245 | 0 | case R_PPC64_ADDR16_DS: |
7246 | 0 | case R_PPC64_ADDR16_HA: |
7247 | 0 | case R_PPC64_ADDR16_HI: |
7248 | 0 | case R_PPC64_ADDR16_HIGH: |
7249 | 0 | case R_PPC64_ADDR16_HIGHA: |
7250 | 0 | case R_PPC64_ADDR16_HIGHER: |
7251 | 0 | case R_PPC64_ADDR16_HIGHERA: |
7252 | 0 | case R_PPC64_ADDR16_HIGHEST: |
7253 | 0 | case R_PPC64_ADDR16_HIGHESTA: |
7254 | 0 | case R_PPC64_ADDR16_LO: |
7255 | 0 | case R_PPC64_ADDR16_LO_DS: |
7256 | 0 | case R_PPC64_ADDR24: |
7257 | 0 | case R_PPC64_ADDR32: |
7258 | 0 | case R_PPC64_UADDR16: |
7259 | 0 | case R_PPC64_UADDR32: |
7260 | 0 | case R_PPC64_UADDR64: |
7261 | 0 | case R_PPC64_TOC: |
7262 | 0 | case R_PPC64_D34: |
7263 | 0 | case R_PPC64_D34_LO: |
7264 | 0 | case R_PPC64_D34_HI30: |
7265 | 0 | case R_PPC64_D34_HA30: |
7266 | 0 | case R_PPC64_ADDR16_HIGHER34: |
7267 | 0 | case R_PPC64_ADDR16_HIGHERA34: |
7268 | 0 | case R_PPC64_ADDR16_HIGHEST34: |
7269 | 0 | case R_PPC64_ADDR16_HIGHESTA34: |
7270 | 0 | case R_PPC64_D28: |
7271 | 0 | break; |
7272 | 0 | } |
7273 | | |
7274 | 0 | if (local_syms != NULL) |
7275 | 0 | { |
7276 | 0 | unsigned long r_symndx; |
7277 | 0 | bfd *ibfd = sec->owner; |
7278 | |
|
7279 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
7280 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, local_syms, r_symndx, ibfd)) |
7281 | 0 | return false; |
7282 | 0 | } |
7283 | | |
7284 | 0 | if ((h != NULL |
7285 | 0 | && !SYMBOL_REFERENCES_LOCAL (info, h)) |
7286 | 0 | || (bfd_link_pic (info) |
7287 | 0 | && (h != NULL |
7288 | 0 | ? !bfd_is_abs_symbol (&h->root) |
7289 | 0 | : sym_sec != bfd_abs_section_ptr) |
7290 | 0 | && must_be_dyn_reloc (info, r_type)) |
7291 | 0 | || (!bfd_link_pic (info) |
7292 | 0 | && (h != NULL |
7293 | 0 | ? h->type == STT_GNU_IFUNC |
7294 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))) |
7295 | 0 | ; |
7296 | 0 | else |
7297 | 0 | return true; |
7298 | | |
7299 | 0 | if (h != NULL) |
7300 | 0 | { |
7301 | 0 | struct ppc_dyn_relocs *p; |
7302 | 0 | struct ppc_dyn_relocs **pp; |
7303 | 0 | pp = (struct ppc_dyn_relocs **) &h->dyn_relocs; |
7304 | | |
7305 | | /* elf_gc_sweep may have already removed all dyn relocs associated |
7306 | | with local syms for a given section. Also, symbol flags are |
7307 | | changed by elf_gc_sweep_symbol, confusing the test above. Don't |
7308 | | report a dynreloc miscount. */ |
7309 | 0 | if (*pp == NULL && info->gc_sections) |
7310 | 0 | return true; |
7311 | | |
7312 | 0 | while ((p = *pp) != NULL) |
7313 | 0 | { |
7314 | 0 | if (p->sec == sec) |
7315 | 0 | { |
7316 | 0 | if (!must_be_dyn_reloc (info, r_type)) |
7317 | 0 | p->pc_count -= 1; |
7318 | 0 | if (maybe_relr (r_type, rel, sec)) |
7319 | 0 | p->rel_count -= 1; |
7320 | 0 | p->count -= 1; |
7321 | 0 | if (p->count == 0) |
7322 | 0 | *pp = p->next; |
7323 | 0 | return true; |
7324 | 0 | } |
7325 | 0 | pp = &p->next; |
7326 | 0 | } |
7327 | 0 | } |
7328 | 0 | else |
7329 | 0 | { |
7330 | 0 | struct ppc_local_dyn_relocs *p; |
7331 | 0 | struct ppc_local_dyn_relocs **pp; |
7332 | 0 | void *vpp; |
7333 | 0 | bool is_ifunc; |
7334 | |
|
7335 | 0 | if (local_syms == NULL) |
7336 | 0 | sym_sec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
7337 | 0 | if (sym_sec == NULL) |
7338 | 0 | sym_sec = sec; |
7339 | |
|
7340 | 0 | vpp = &elf_section_data (sym_sec)->local_dynrel; |
7341 | 0 | pp = (struct ppc_local_dyn_relocs **) vpp; |
7342 | |
|
7343 | 0 | if (*pp == NULL && info->gc_sections) |
7344 | 0 | return true; |
7345 | | |
7346 | 0 | is_ifunc = ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC; |
7347 | 0 | while ((p = *pp) != NULL) |
7348 | 0 | { |
7349 | 0 | if (p->sec == sec && p->ifunc == is_ifunc) |
7350 | 0 | { |
7351 | 0 | if (maybe_relr (r_type, rel, sec)) |
7352 | 0 | p->rel_count -= 1; |
7353 | 0 | p->count -= 1; |
7354 | 0 | if (p->count == 0) |
7355 | 0 | *pp = p->next; |
7356 | 0 | return true; |
7357 | 0 | } |
7358 | 0 | pp = &p->next; |
7359 | 0 | } |
7360 | 0 | } |
7361 | | |
7362 | | /* xgettext:c-format */ |
7363 | 0 | _bfd_error_handler (_("dynreloc miscount for %pB, section %pA"), |
7364 | 0 | sec->owner, sec); |
7365 | 0 | bfd_set_error (bfd_error_bad_value); |
7366 | 0 | return false; |
7367 | 0 | } |
7368 | | |
7369 | | /* Remove unused Official Procedure Descriptor entries. Currently we |
7370 | | only remove those associated with functions in discarded link-once |
7371 | | sections, or weakly defined functions that have been overridden. It |
7372 | | would be possible to remove many more entries for statically linked |
7373 | | applications. */ |
7374 | | |
7375 | | bool |
7376 | | ppc64_elf_edit_opd (struct bfd_link_info *info) |
7377 | 0 | { |
7378 | 0 | bfd *ibfd; |
7379 | 0 | bool some_edited = false; |
7380 | 0 | asection *need_pad = NULL; |
7381 | 0 | struct ppc_link_hash_table *htab; |
7382 | |
|
7383 | 0 | htab = ppc_hash_table (info); |
7384 | 0 | if (htab == NULL) |
7385 | 0 | return false; |
7386 | | |
7387 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7388 | 0 | { |
7389 | 0 | asection *sec; |
7390 | 0 | Elf_Internal_Rela *relstart, *rel, *relend; |
7391 | 0 | Elf_Internal_Shdr *symtab_hdr; |
7392 | 0 | Elf_Internal_Sym *local_syms; |
7393 | 0 | struct _opd_sec_data *opd; |
7394 | 0 | bool need_edit, add_aux_fields, broken; |
7395 | 0 | bfd_size_type cnt_16b = 0; |
7396 | |
|
7397 | 0 | if (!is_ppc64_elf (ibfd)) |
7398 | 0 | continue; |
7399 | | |
7400 | 0 | sec = bfd_get_section_by_name (ibfd, ".opd"); |
7401 | 0 | if (sec == NULL |
7402 | 0 | || sec->size == 0 |
7403 | 0 | || (sec->flags & SEC_HAS_CONTENTS) == 0) |
7404 | 0 | continue; |
7405 | | |
7406 | 0 | if (sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
7407 | 0 | continue; |
7408 | | |
7409 | 0 | if (sec->output_section == bfd_abs_section_ptr) |
7410 | 0 | continue; |
7411 | | |
7412 | | /* Look through the section relocs. */ |
7413 | 0 | if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) |
7414 | 0 | continue; |
7415 | | |
7416 | 0 | local_syms = NULL; |
7417 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
7418 | | |
7419 | | /* Read the relocations. */ |
7420 | 0 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
7421 | 0 | info->keep_memory); |
7422 | 0 | if (relstart == NULL) |
7423 | 0 | return false; |
7424 | | |
7425 | | /* First run through the relocs to check they are sane, and to |
7426 | | determine whether we need to edit this opd section. */ |
7427 | 0 | need_edit = false; |
7428 | 0 | broken = false; |
7429 | 0 | need_pad = sec; |
7430 | 0 | relend = relstart + sec->reloc_count; |
7431 | 0 | for (rel = relstart; rel < relend; ) |
7432 | 0 | { |
7433 | 0 | enum elf_ppc64_reloc_type r_type; |
7434 | 0 | unsigned long r_symndx; |
7435 | 0 | asection *sym_sec; |
7436 | 0 | struct elf_link_hash_entry *h; |
7437 | 0 | Elf_Internal_Sym *sym; |
7438 | 0 | bfd_vma offset; |
7439 | | |
7440 | | /* .opd contains an array of 16 or 24 byte entries. We're |
7441 | | only interested in the reloc pointing to a function entry |
7442 | | point. */ |
7443 | 0 | offset = rel->r_offset; |
7444 | 0 | if (rel + 1 == relend |
7445 | 0 | || rel[1].r_offset != offset + 8) |
7446 | 0 | { |
7447 | | /* If someone messes with .opd alignment then after a |
7448 | | "ld -r" we might have padding in the middle of .opd. |
7449 | | Also, there's nothing to prevent someone putting |
7450 | | something silly in .opd with the assembler. No .opd |
7451 | | optimization for them! */ |
7452 | 0 | broken_opd: |
7453 | 0 | _bfd_error_handler |
7454 | 0 | (_("%pB: .opd is not a regular array of opd entries"), ibfd); |
7455 | 0 | broken = true; |
7456 | 0 | break; |
7457 | 0 | } |
7458 | | |
7459 | 0 | if ((r_type = ELF64_R_TYPE (rel->r_info)) != R_PPC64_ADDR64 |
7460 | 0 | || (r_type = ELF64_R_TYPE ((rel + 1)->r_info)) != R_PPC64_TOC) |
7461 | 0 | { |
7462 | 0 | _bfd_error_handler |
7463 | | /* xgettext:c-format */ |
7464 | 0 | (_("%pB: unexpected reloc type %u in .opd section"), |
7465 | 0 | ibfd, r_type); |
7466 | 0 | broken = true; |
7467 | 0 | break; |
7468 | 0 | } |
7469 | | |
7470 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
7471 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
7472 | 0 | r_symndx, ibfd)) |
7473 | 0 | goto error_ret; |
7474 | | |
7475 | 0 | if (sym_sec == NULL || sym_sec->owner == NULL) |
7476 | 0 | { |
7477 | 0 | const char *sym_name; |
7478 | 0 | if (h != NULL) |
7479 | 0 | sym_name = h->root.root.string; |
7480 | 0 | else |
7481 | 0 | sym_name = bfd_elf_sym_name (ibfd, symtab_hdr, sym, |
7482 | 0 | sym_sec); |
7483 | |
|
7484 | 0 | _bfd_error_handler |
7485 | | /* xgettext:c-format */ |
7486 | 0 | (_("%pB: undefined sym `%s' in .opd section"), |
7487 | 0 | ibfd, sym_name); |
7488 | 0 | broken = true; |
7489 | 0 | break; |
7490 | 0 | } |
7491 | | |
7492 | | /* opd entries are always for functions defined in the |
7493 | | current input bfd. If the symbol isn't defined in the |
7494 | | input bfd, then we won't be using the function in this |
7495 | | bfd; It must be defined in a linkonce section in another |
7496 | | bfd, or is weak. It's also possible that we are |
7497 | | discarding the function due to a linker script /DISCARD/, |
7498 | | which we test for via the output_section. */ |
7499 | 0 | if (sym_sec->owner != ibfd |
7500 | 0 | || sym_sec->output_section == bfd_abs_section_ptr) |
7501 | 0 | need_edit = true; |
7502 | |
|
7503 | 0 | rel += 2; |
7504 | 0 | if (rel + 1 == relend |
7505 | 0 | || (rel + 2 < relend |
7506 | 0 | && ELF64_R_TYPE (rel[2].r_info) == R_PPC64_TOC)) |
7507 | 0 | ++rel; |
7508 | |
|
7509 | 0 | if (rel == relend) |
7510 | 0 | { |
7511 | 0 | if (sec->size == offset + 24) |
7512 | 0 | { |
7513 | 0 | need_pad = NULL; |
7514 | 0 | break; |
7515 | 0 | } |
7516 | 0 | if (sec->size == offset + 16) |
7517 | 0 | { |
7518 | 0 | cnt_16b++; |
7519 | 0 | break; |
7520 | 0 | } |
7521 | 0 | goto broken_opd; |
7522 | 0 | } |
7523 | 0 | else if (rel + 1 < relend |
7524 | 0 | && ELF64_R_TYPE (rel[0].r_info) == R_PPC64_ADDR64 |
7525 | 0 | && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOC) |
7526 | 0 | { |
7527 | 0 | if (rel[0].r_offset == offset + 16) |
7528 | 0 | cnt_16b++; |
7529 | 0 | else if (rel[0].r_offset != offset + 24) |
7530 | 0 | goto broken_opd; |
7531 | 0 | } |
7532 | 0 | else |
7533 | 0 | goto broken_opd; |
7534 | 0 | } |
7535 | | |
7536 | 0 | add_aux_fields = htab->params->non_overlapping_opd && cnt_16b > 0; |
7537 | |
|
7538 | 0 | if (!broken && (need_edit || add_aux_fields)) |
7539 | 0 | { |
7540 | 0 | Elf_Internal_Rela *write_rel; |
7541 | 0 | Elf_Internal_Shdr *rel_hdr; |
7542 | 0 | bfd_byte *rptr, *wptr; |
7543 | 0 | bfd_byte *new_contents; |
7544 | 0 | bfd_size_type amt; |
7545 | |
|
7546 | 0 | new_contents = NULL; |
7547 | 0 | amt = OPD_NDX (sec->size) * sizeof (long); |
7548 | 0 | opd = &ppc64_elf_section_data (sec)->u.opd; |
7549 | 0 | opd->adjust = bfd_zalloc (sec->owner, amt); |
7550 | 0 | if (opd->adjust == NULL) |
7551 | 0 | return false; |
7552 | | |
7553 | | /* This seems a waste of time as input .opd sections are all |
7554 | | zeros as generated by gcc, but I suppose there's no reason |
7555 | | this will always be so. We might start putting something in |
7556 | | the third word of .opd entries. */ |
7557 | 0 | if ((sec->flags & SEC_IN_MEMORY) == 0) |
7558 | 0 | { |
7559 | 0 | bfd_byte *loc; |
7560 | 0 | if (!bfd_malloc_and_get_section (ibfd, sec, &loc)) |
7561 | 0 | { |
7562 | 0 | free (loc); |
7563 | 0 | error_ret: |
7564 | 0 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
7565 | 0 | free (local_syms); |
7566 | 0 | if (elf_section_data (sec)->relocs != relstart) |
7567 | 0 | free (relstart); |
7568 | 0 | return false; |
7569 | 0 | } |
7570 | 0 | sec->contents = loc; |
7571 | 0 | sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
7572 | 0 | } |
7573 | | |
7574 | 0 | elf_section_data (sec)->relocs = relstart; |
7575 | |
|
7576 | 0 | new_contents = sec->contents; |
7577 | 0 | if (add_aux_fields) |
7578 | 0 | { |
7579 | 0 | new_contents = bfd_malloc (sec->size + cnt_16b * 8); |
7580 | 0 | if (new_contents == NULL) |
7581 | 0 | return false; |
7582 | 0 | need_pad = NULL; |
7583 | 0 | } |
7584 | 0 | wptr = new_contents; |
7585 | 0 | rptr = sec->contents; |
7586 | 0 | write_rel = relstart; |
7587 | 0 | for (rel = relstart; rel < relend; ) |
7588 | 0 | { |
7589 | 0 | unsigned long r_symndx; |
7590 | 0 | asection *sym_sec; |
7591 | 0 | struct elf_link_hash_entry *h; |
7592 | 0 | struct ppc_link_hash_entry *fdh = NULL; |
7593 | 0 | Elf_Internal_Sym *sym; |
7594 | 0 | long opd_ent_size; |
7595 | 0 | Elf_Internal_Rela *next_rel; |
7596 | 0 | bool skip; |
7597 | |
|
7598 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
7599 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
7600 | 0 | r_symndx, ibfd)) |
7601 | 0 | goto error_ret; |
7602 | | |
7603 | 0 | next_rel = rel + 2; |
7604 | 0 | if (next_rel + 1 == relend |
7605 | 0 | || (next_rel + 2 < relend |
7606 | 0 | && ELF64_R_TYPE (next_rel[2].r_info) == R_PPC64_TOC)) |
7607 | 0 | ++next_rel; |
7608 | | |
7609 | | /* See if the .opd entry is full 24 byte or |
7610 | | 16 byte (with fd_aux entry overlapped with next |
7611 | | fd_func). */ |
7612 | 0 | opd_ent_size = 24; |
7613 | 0 | if (next_rel == relend) |
7614 | 0 | { |
7615 | 0 | if (sec->size == rel->r_offset + 16) |
7616 | 0 | opd_ent_size = 16; |
7617 | 0 | } |
7618 | 0 | else if (next_rel->r_offset == rel->r_offset + 16) |
7619 | 0 | opd_ent_size = 16; |
7620 | |
|
7621 | 0 | if (h != NULL |
7622 | 0 | && h->root.root.string[0] == '.') |
7623 | 0 | { |
7624 | 0 | fdh = ppc_elf_hash_entry (h)->oh; |
7625 | 0 | if (fdh != NULL) |
7626 | 0 | { |
7627 | 0 | fdh = ppc_follow_link (fdh); |
7628 | 0 | if (fdh->elf.root.type != bfd_link_hash_defined |
7629 | 0 | && fdh->elf.root.type != bfd_link_hash_defweak) |
7630 | 0 | fdh = NULL; |
7631 | 0 | } |
7632 | 0 | } |
7633 | |
|
7634 | 0 | skip = (sym_sec->owner != ibfd |
7635 | 0 | || sym_sec->output_section == bfd_abs_section_ptr); |
7636 | 0 | if (skip) |
7637 | 0 | { |
7638 | 0 | if (fdh != NULL && sym_sec->owner == ibfd) |
7639 | 0 | { |
7640 | | /* Arrange for the function descriptor sym |
7641 | | to be dropped. */ |
7642 | 0 | fdh->elf.root.u.def.value = 0; |
7643 | 0 | fdh->elf.root.u.def.section = sym_sec; |
7644 | 0 | } |
7645 | 0 | opd->adjust[OPD_NDX (rel->r_offset)] = -1; |
7646 | |
|
7647 | 0 | if (NO_OPD_RELOCS || bfd_link_relocatable (info)) |
7648 | 0 | rel = next_rel; |
7649 | 0 | else |
7650 | 0 | while (1) |
7651 | 0 | { |
7652 | 0 | if (!dec_dynrel_count (rel, sec, info, |
7653 | 0 | NULL, h, sym)) |
7654 | 0 | goto error_ret; |
7655 | | |
7656 | 0 | if (++rel == next_rel) |
7657 | 0 | break; |
7658 | | |
7659 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
7660 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
7661 | 0 | r_symndx, ibfd)) |
7662 | 0 | goto error_ret; |
7663 | 0 | } |
7664 | 0 | } |
7665 | 0 | else |
7666 | 0 | { |
7667 | | /* We'll be keeping this opd entry. */ |
7668 | 0 | long adjust; |
7669 | |
|
7670 | 0 | if (fdh != NULL) |
7671 | 0 | { |
7672 | | /* Redefine the function descriptor symbol to |
7673 | | this location in the opd section. It is |
7674 | | necessary to update the value here rather |
7675 | | than using an array of adjustments as we do |
7676 | | for local symbols, because various places |
7677 | | in the generic ELF code use the value |
7678 | | stored in u.def.value. */ |
7679 | 0 | fdh->elf.root.u.def.value = wptr - new_contents; |
7680 | 0 | fdh->adjust_done = 1; |
7681 | 0 | } |
7682 | | |
7683 | | /* Local syms are a bit tricky. We could |
7684 | | tweak them as they can be cached, but |
7685 | | we'd need to look through the local syms |
7686 | | for the function descriptor sym which we |
7687 | | don't have at the moment. So keep an |
7688 | | array of adjustments. */ |
7689 | 0 | adjust = (wptr - new_contents) - (rptr - sec->contents); |
7690 | 0 | opd->adjust[OPD_NDX (rel->r_offset)] = adjust; |
7691 | |
|
7692 | 0 | if (wptr != rptr) |
7693 | 0 | memcpy (wptr, rptr, opd_ent_size); |
7694 | 0 | wptr += opd_ent_size; |
7695 | 0 | if (add_aux_fields && opd_ent_size == 16) |
7696 | 0 | { |
7697 | 0 | memset (wptr, '\0', 8); |
7698 | 0 | wptr += 8; |
7699 | 0 | } |
7700 | | |
7701 | | /* We need to adjust any reloc offsets to point to the |
7702 | | new opd entries. */ |
7703 | 0 | for ( ; rel != next_rel; ++rel) |
7704 | 0 | { |
7705 | 0 | rel->r_offset += adjust; |
7706 | 0 | if (write_rel != rel) |
7707 | 0 | memcpy (write_rel, rel, sizeof (*rel)); |
7708 | 0 | ++write_rel; |
7709 | 0 | } |
7710 | 0 | } |
7711 | | |
7712 | 0 | rptr += opd_ent_size; |
7713 | 0 | } |
7714 | | |
7715 | 0 | sec->size = wptr - new_contents; |
7716 | 0 | sec->reloc_count = write_rel - relstart; |
7717 | 0 | if (add_aux_fields) |
7718 | 0 | { |
7719 | 0 | free (sec->contents); |
7720 | 0 | sec->contents = new_contents; |
7721 | 0 | } |
7722 | | |
7723 | | /* Fudge the header size too, as this is used later in |
7724 | | elf_bfd_final_link if we are emitting relocs. */ |
7725 | 0 | rel_hdr = _bfd_elf_single_rel_hdr (sec); |
7726 | 0 | rel_hdr->sh_size = sec->reloc_count * rel_hdr->sh_entsize; |
7727 | 0 | some_edited = true; |
7728 | 0 | } |
7729 | 0 | else if (elf_section_data (sec)->relocs != relstart) |
7730 | 0 | free (relstart); |
7731 | | |
7732 | 0 | if (local_syms != NULL |
7733 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
7734 | 0 | { |
7735 | 0 | if (!info->keep_memory) |
7736 | 0 | free (local_syms); |
7737 | 0 | else |
7738 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
7739 | 0 | } |
7740 | 0 | } |
7741 | | |
7742 | 0 | if (some_edited) |
7743 | 0 | elf_link_hash_traverse (elf_hash_table (info), adjust_opd_syms, NULL); |
7744 | | |
7745 | | /* If we are doing a final link and the last .opd entry is just 16 byte |
7746 | | long, add a 8 byte padding after it. */ |
7747 | 0 | if (need_pad != NULL && !bfd_link_relocatable (info)) |
7748 | 0 | { |
7749 | 0 | bfd_byte *p; |
7750 | |
|
7751 | 0 | if ((need_pad->flags & SEC_IN_MEMORY) == 0) |
7752 | 0 | { |
7753 | 0 | BFD_ASSERT (need_pad->size > 0); |
7754 | |
|
7755 | 0 | p = bfd_malloc (need_pad->size + 8); |
7756 | 0 | if (p == NULL) |
7757 | 0 | return false; |
7758 | | |
7759 | 0 | if (!bfd_get_section_contents (need_pad->owner, need_pad, |
7760 | 0 | p, 0, need_pad->size)) |
7761 | 0 | return false; |
7762 | | |
7763 | 0 | need_pad->contents = p; |
7764 | 0 | need_pad->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
7765 | 0 | } |
7766 | 0 | else |
7767 | 0 | { |
7768 | 0 | p = bfd_realloc (need_pad->contents, need_pad->size + 8); |
7769 | 0 | if (p == NULL) |
7770 | 0 | return false; |
7771 | | |
7772 | 0 | need_pad->contents = p; |
7773 | 0 | } |
7774 | | |
7775 | 0 | memset (need_pad->contents + need_pad->size, 0, 8); |
7776 | 0 | need_pad->size += 8; |
7777 | 0 | } |
7778 | | |
7779 | 0 | return true; |
7780 | 0 | } |
7781 | | |
7782 | | /* Analyze inline PLT call relocations to see whether calls to locally |
7783 | | defined functions can be converted to direct calls. */ |
7784 | | |
7785 | | bool |
7786 | | ppc64_elf_inline_plt (struct bfd_link_info *info) |
7787 | 0 | { |
7788 | 0 | struct ppc_link_hash_table *htab; |
7789 | 0 | bfd *ibfd; |
7790 | 0 | asection *sec; |
7791 | 0 | bfd_vma low_vma, high_vma, limit; |
7792 | |
|
7793 | 0 | htab = ppc_hash_table (info); |
7794 | 0 | if (htab == NULL) |
7795 | 0 | return false; |
7796 | | |
7797 | | /* A bl insn can reach -0x2000000 to 0x1fffffc. The limit is |
7798 | | reduced somewhat to cater for possible stubs that might be added |
7799 | | between the call and its destination. */ |
7800 | 0 | if (htab->params->group_size < 0) |
7801 | 0 | { |
7802 | 0 | limit = -htab->params->group_size; |
7803 | 0 | if (limit == 1) |
7804 | 0 | limit = 0x1e00000; |
7805 | 0 | } |
7806 | 0 | else |
7807 | 0 | { |
7808 | 0 | limit = htab->params->group_size; |
7809 | 0 | if (limit == 1) |
7810 | 0 | limit = 0x1c00000; |
7811 | 0 | } |
7812 | |
|
7813 | 0 | low_vma = -1; |
7814 | 0 | high_vma = 0; |
7815 | 0 | for (sec = info->output_bfd->sections; sec != NULL; sec = sec->next) |
7816 | 0 | if ((sec->flags & (SEC_ALLOC | SEC_CODE)) == (SEC_ALLOC | SEC_CODE)) |
7817 | 0 | { |
7818 | 0 | if (low_vma > sec->vma) |
7819 | 0 | low_vma = sec->vma; |
7820 | 0 | if (high_vma < sec->vma + sec->size) |
7821 | 0 | high_vma = sec->vma + sec->size; |
7822 | 0 | } |
7823 | | |
7824 | | /* If a "bl" can reach anywhere in local code sections, then we can |
7825 | | convert all inline PLT sequences to direct calls when the symbol |
7826 | | is local. */ |
7827 | 0 | if (high_vma - low_vma < limit) |
7828 | 0 | { |
7829 | 0 | htab->can_convert_all_inline_plt = 1; |
7830 | 0 | return true; |
7831 | 0 | } |
7832 | | |
7833 | | /* Otherwise, go looking through relocs for cases where a direct |
7834 | | call won't reach. Mark the symbol on any such reloc to disable |
7835 | | the optimization and keep the PLT entry as it seems likely that |
7836 | | this will be better than creating trampolines. Note that this |
7837 | | will disable the optimization for all inline PLT calls to a |
7838 | | particular symbol, not just those that won't reach. The |
7839 | | difficulty in doing a more precise optimization is that the |
7840 | | linker needs to make a decision depending on whether a |
7841 | | particular R_PPC64_PLTCALL insn can be turned into a direct |
7842 | | call, for each of the R_PPC64_PLTSEQ and R_PPC64_PLT16* insns in |
7843 | | the sequence, and there is nothing that ties those relocs |
7844 | | together except their symbol. */ |
7845 | | |
7846 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7847 | 0 | { |
7848 | 0 | Elf_Internal_Shdr *symtab_hdr; |
7849 | 0 | Elf_Internal_Sym *local_syms; |
7850 | |
|
7851 | 0 | if (!is_ppc64_elf (ibfd)) |
7852 | 0 | continue; |
7853 | | |
7854 | 0 | local_syms = NULL; |
7855 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
7856 | |
|
7857 | 0 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
7858 | 0 | if (ppc64_elf_section_data (sec)->has_pltcall |
7859 | 0 | && !bfd_is_abs_section (sec->output_section)) |
7860 | 0 | { |
7861 | 0 | Elf_Internal_Rela *relstart, *rel, *relend; |
7862 | | |
7863 | | /* Read the relocations. */ |
7864 | 0 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
7865 | 0 | info->keep_memory); |
7866 | 0 | if (relstart == NULL) |
7867 | 0 | return false; |
7868 | | |
7869 | 0 | relend = relstart + sec->reloc_count; |
7870 | 0 | for (rel = relstart; rel < relend; rel++) |
7871 | 0 | { |
7872 | 0 | enum elf_ppc64_reloc_type r_type; |
7873 | 0 | unsigned long r_symndx; |
7874 | 0 | asection *sym_sec; |
7875 | 0 | struct elf_link_hash_entry *h; |
7876 | 0 | Elf_Internal_Sym *sym; |
7877 | 0 | unsigned char *tls_maskp; |
7878 | |
|
7879 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
7880 | 0 | if (r_type != R_PPC64_PLTCALL |
7881 | 0 | && r_type != R_PPC64_PLTCALL_NOTOC) |
7882 | 0 | continue; |
7883 | | |
7884 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
7885 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, &tls_maskp, &local_syms, |
7886 | 0 | r_symndx, ibfd)) |
7887 | 0 | { |
7888 | 0 | if (elf_section_data (sec)->relocs != relstart) |
7889 | 0 | free (relstart); |
7890 | 0 | if (symtab_hdr->contents != (bfd_byte *) local_syms) |
7891 | 0 | free (local_syms); |
7892 | 0 | return false; |
7893 | 0 | } |
7894 | | |
7895 | 0 | if (sym_sec != NULL && sym_sec->output_section != NULL) |
7896 | 0 | { |
7897 | 0 | bfd_vma from, to; |
7898 | 0 | if (h != NULL) |
7899 | 0 | to = h->root.u.def.value; |
7900 | 0 | else |
7901 | 0 | to = sym->st_value; |
7902 | 0 | to += (rel->r_addend |
7903 | 0 | + sym_sec->output_offset |
7904 | 0 | + sym_sec->output_section->vma); |
7905 | 0 | from = (rel->r_offset |
7906 | 0 | + sec->output_offset |
7907 | 0 | + sec->output_section->vma); |
7908 | 0 | if (to - from + limit < 2 * limit |
7909 | 0 | && !(r_type == R_PPC64_PLTCALL_NOTOC |
7910 | 0 | && (((h ? h->other : sym->st_other) |
7911 | 0 | & STO_PPC64_LOCAL_MASK) |
7912 | 0 | > 1 << STO_PPC64_LOCAL_BIT))) |
7913 | 0 | *tls_maskp &= ~PLT_KEEP; |
7914 | 0 | } |
7915 | 0 | } |
7916 | 0 | if (elf_section_data (sec)->relocs != relstart) |
7917 | 0 | free (relstart); |
7918 | 0 | } |
7919 | | |
7920 | 0 | if (local_syms != NULL |
7921 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
7922 | 0 | { |
7923 | 0 | if (!info->keep_memory) |
7924 | 0 | free (local_syms); |
7925 | 0 | else |
7926 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
7927 | 0 | } |
7928 | 0 | } |
7929 | | |
7930 | 0 | return true; |
7931 | 0 | } |
7932 | | |
7933 | | /* Set htab->tls_get_addr and various other info specific to TLS. |
7934 | | This needs to run before dynamic symbols are processed in |
7935 | | bfd_elf_size_dynamic_sections. */ |
7936 | | |
7937 | | bool |
7938 | | ppc64_elf_tls_setup (struct bfd_link_info *info) |
7939 | 0 | { |
7940 | 0 | struct ppc_link_hash_table *htab; |
7941 | 0 | struct elf_link_hash_entry *tga, *tga_fd, *desc, *desc_fd; |
7942 | |
|
7943 | 0 | htab = ppc_hash_table (info); |
7944 | 0 | if (htab == NULL) |
7945 | 0 | return false; |
7946 | | |
7947 | | /* Move dynamic linking info to the function descriptor sym. */ |
7948 | 0 | if (htab->need_func_desc_adj) |
7949 | 0 | { |
7950 | 0 | elf_link_hash_traverse (&htab->elf, func_desc_adjust, info); |
7951 | 0 | htab->need_func_desc_adj = 0; |
7952 | 0 | } |
7953 | |
|
7954 | 0 | if (abiversion (info->output_bfd) == 1) |
7955 | 0 | htab->opd_abi = 1; |
7956 | |
|
7957 | 0 | if (htab->params->no_multi_toc) |
7958 | 0 | htab->do_multi_toc = 0; |
7959 | 0 | else if (!htab->do_multi_toc) |
7960 | 0 | htab->params->no_multi_toc = 1; |
7961 | | |
7962 | | /* Default to --no-plt-localentry, as this option can cause problems |
7963 | | with symbol interposition. For example, glibc libpthread.so and |
7964 | | libc.so duplicate many pthread symbols, with a fallback |
7965 | | implementation in libc.so. In some cases the fallback does more |
7966 | | work than the pthread implementation. __pthread_condattr_destroy |
7967 | | is one such symbol: the libpthread.so implementation is |
7968 | | localentry:0 while the libc.so implementation is localentry:8. |
7969 | | An app that "cleverly" uses dlopen to only load necessary |
7970 | | libraries at runtime may omit loading libpthread.so when not |
7971 | | running multi-threaded, which then results in the libc.so |
7972 | | fallback symbols being used and ld.so complaining. Now there |
7973 | | are workarounds in ld (see non_zero_localentry) to detect the |
7974 | | pthread situation, but that may not be the only case where |
7975 | | --plt-localentry can cause trouble. */ |
7976 | 0 | if (htab->params->plt_localentry0 < 0) |
7977 | 0 | htab->params->plt_localentry0 = 0; |
7978 | 0 | if (htab->params->plt_localentry0 && htab->has_power10_relocs) |
7979 | 0 | { |
7980 | | /* The issue is that __glink_PLTresolve saves r2, which is done |
7981 | | because glibc ld.so _dl_runtime_resolve restores r2 to support |
7982 | | a glibc plt call optimisation where global entry code is |
7983 | | skipped on calls that resolve to the same binary. The |
7984 | | __glink_PLTresolve save of r2 is incompatible with code |
7985 | | making tail calls, because the tail call might go via the |
7986 | | resolver and thus overwrite the proper saved r2. */ |
7987 | 0 | _bfd_error_handler (_("warning: --plt-localentry is incompatible with " |
7988 | 0 | "power10 pc-relative code")); |
7989 | 0 | htab->params->plt_localentry0 = 0; |
7990 | 0 | } |
7991 | 0 | if (htab->params->plt_localentry0 |
7992 | 0 | && elf_link_hash_lookup (&htab->elf, "GLIBC_2.26", |
7993 | 0 | false, false, false) == NULL) |
7994 | 0 | _bfd_error_handler |
7995 | 0 | (_("warning: --plt-localentry is especially dangerous without " |
7996 | 0 | "ld.so support to detect ABI violations")); |
7997 | |
|
7998 | 0 | tga = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr", |
7999 | 0 | false, false, true); |
8000 | 0 | htab->tls_get_addr = ppc_elf_hash_entry (tga); |
8001 | 0 | tga_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr", |
8002 | 0 | false, false, true); |
8003 | 0 | htab->tls_get_addr_fd = ppc_elf_hash_entry (tga_fd); |
8004 | |
|
8005 | 0 | desc = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_desc", |
8006 | 0 | false, false, true); |
8007 | 0 | htab->tga_desc = ppc_elf_hash_entry (desc); |
8008 | 0 | desc_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_desc", |
8009 | 0 | false, false, true); |
8010 | 0 | htab->tga_desc_fd = ppc_elf_hash_entry (desc_fd); |
8011 | |
|
8012 | 0 | if (htab->params->tls_get_addr_opt) |
8013 | 0 | { |
8014 | 0 | struct elf_link_hash_entry *opt, *opt_fd; |
8015 | |
|
8016 | 0 | opt = elf_link_hash_lookup (&htab->elf, ".__tls_get_addr_opt", |
8017 | 0 | false, false, true); |
8018 | 0 | opt_fd = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt", |
8019 | 0 | false, false, true); |
8020 | 0 | if (opt_fd != NULL |
8021 | 0 | && (opt_fd->root.type == bfd_link_hash_defined |
8022 | 0 | || opt_fd->root.type == bfd_link_hash_defweak)) |
8023 | 0 | { |
8024 | | /* If glibc supports an optimized __tls_get_addr call stub, |
8025 | | signalled by the presence of __tls_get_addr_opt, and we'll |
8026 | | be calling __tls_get_addr via a plt call stub, then |
8027 | | make __tls_get_addr point to __tls_get_addr_opt. */ |
8028 | 0 | if (!(htab->elf.dynamic_sections_created |
8029 | 0 | && tga_fd != NULL |
8030 | 0 | && (tga_fd->type == STT_FUNC |
8031 | 0 | || tga_fd->needs_plt) |
8032 | 0 | && !(SYMBOL_CALLS_LOCAL (info, tga_fd) |
8033 | 0 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, tga_fd)))) |
8034 | 0 | tga_fd = NULL; |
8035 | 0 | if (!(htab->elf.dynamic_sections_created |
8036 | 0 | && desc_fd != NULL |
8037 | 0 | && (desc_fd->type == STT_FUNC |
8038 | 0 | || desc_fd->needs_plt) |
8039 | 0 | && !(SYMBOL_CALLS_LOCAL (info, desc_fd) |
8040 | 0 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, desc_fd)))) |
8041 | 0 | desc_fd = NULL; |
8042 | |
|
8043 | 0 | if (tga_fd != NULL || desc_fd != NULL) |
8044 | 0 | { |
8045 | 0 | struct plt_entry *ent = NULL; |
8046 | |
|
8047 | 0 | if (tga_fd != NULL) |
8048 | 0 | for (ent = tga_fd->plt.plist; ent != NULL; ent = ent->next) |
8049 | 0 | if (ent->plt.refcount > 0) |
8050 | 0 | break; |
8051 | 0 | if (ent == NULL && desc_fd != NULL) |
8052 | 0 | for (ent = desc_fd->plt.plist; ent != NULL; ent = ent->next) |
8053 | 0 | if (ent->plt.refcount > 0) |
8054 | 0 | break; |
8055 | 0 | if (ent != NULL) |
8056 | 0 | { |
8057 | 0 | if (tga_fd != NULL) |
8058 | 0 | { |
8059 | 0 | tga_fd->root.type = bfd_link_hash_indirect; |
8060 | 0 | tga_fd->root.u.i.link = &opt_fd->root; |
8061 | 0 | tga_fd->root.u.i.warning = NULL; |
8062 | 0 | ppc64_elf_copy_indirect_symbol (info, opt_fd, tga_fd); |
8063 | 0 | } |
8064 | 0 | if (desc_fd != NULL) |
8065 | 0 | { |
8066 | 0 | desc_fd->root.type = bfd_link_hash_indirect; |
8067 | 0 | desc_fd->root.u.i.link = &opt_fd->root; |
8068 | 0 | desc_fd->root.u.i.warning = NULL; |
8069 | 0 | ppc64_elf_copy_indirect_symbol (info, opt_fd, desc_fd); |
8070 | 0 | } |
8071 | 0 | opt_fd->mark = 1; |
8072 | 0 | if (opt_fd->dynindx != -1) |
8073 | 0 | { |
8074 | | /* Use __tls_get_addr_opt in dynamic relocations. */ |
8075 | 0 | opt_fd->dynindx = -1; |
8076 | 0 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, |
8077 | 0 | opt_fd->dynstr_index); |
8078 | 0 | if (!bfd_elf_link_record_dynamic_symbol (info, opt_fd)) |
8079 | 0 | return false; |
8080 | 0 | } |
8081 | 0 | if (tga_fd != NULL) |
8082 | 0 | { |
8083 | 0 | htab->tls_get_addr_fd = ppc_elf_hash_entry (opt_fd); |
8084 | 0 | tga = elf_hash_entry (htab->tls_get_addr); |
8085 | 0 | if (opt != NULL && tga != NULL) |
8086 | 0 | { |
8087 | 0 | tga->root.type = bfd_link_hash_indirect; |
8088 | 0 | tga->root.u.i.link = &opt->root; |
8089 | 0 | tga->root.u.i.warning = NULL; |
8090 | 0 | ppc64_elf_copy_indirect_symbol (info, opt, tga); |
8091 | 0 | opt->mark = 1; |
8092 | 0 | _bfd_elf_link_hash_hide_symbol (info, opt, |
8093 | 0 | tga->forced_local); |
8094 | 0 | htab->tls_get_addr = ppc_elf_hash_entry (opt); |
8095 | 0 | } |
8096 | 0 | htab->tls_get_addr_fd->oh = htab->tls_get_addr; |
8097 | 0 | htab->tls_get_addr_fd->is_func_descriptor = 1; |
8098 | 0 | if (htab->tls_get_addr != NULL) |
8099 | 0 | { |
8100 | 0 | htab->tls_get_addr->oh = htab->tls_get_addr_fd; |
8101 | 0 | htab->tls_get_addr->is_func = 1; |
8102 | 0 | } |
8103 | 0 | } |
8104 | 0 | if (desc_fd != NULL) |
8105 | 0 | { |
8106 | 0 | htab->tga_desc_fd = ppc_elf_hash_entry (opt_fd); |
8107 | 0 | if (opt != NULL && desc != NULL) |
8108 | 0 | { |
8109 | 0 | desc->root.type = bfd_link_hash_indirect; |
8110 | 0 | desc->root.u.i.link = &opt->root; |
8111 | 0 | desc->root.u.i.warning = NULL; |
8112 | 0 | ppc64_elf_copy_indirect_symbol (info, opt, desc); |
8113 | 0 | opt->mark = 1; |
8114 | 0 | _bfd_elf_link_hash_hide_symbol (info, opt, |
8115 | 0 | desc->forced_local); |
8116 | 0 | htab->tga_desc = ppc_elf_hash_entry (opt); |
8117 | 0 | } |
8118 | 0 | htab->tga_desc_fd->oh = htab->tga_desc; |
8119 | 0 | htab->tga_desc_fd->is_func_descriptor = 1; |
8120 | 0 | if (htab->tga_desc != NULL) |
8121 | 0 | { |
8122 | 0 | htab->tga_desc->oh = htab->tga_desc_fd; |
8123 | 0 | htab->tga_desc->is_func = 1; |
8124 | 0 | } |
8125 | 0 | } |
8126 | 0 | } |
8127 | 0 | } |
8128 | 0 | } |
8129 | 0 | else if (htab->params->tls_get_addr_opt < 0) |
8130 | 0 | htab->params->tls_get_addr_opt = 0; |
8131 | 0 | } |
8132 | | |
8133 | 0 | if (htab->tga_desc_fd != NULL |
8134 | 0 | && htab->params->tls_get_addr_opt |
8135 | 0 | && htab->params->no_tls_get_addr_regsave == -1) |
8136 | 0 | htab->params->no_tls_get_addr_regsave = 0; |
8137 | |
|
8138 | 0 | return true; |
8139 | 0 | } |
8140 | | |
8141 | | /* Return TRUE iff REL is a branch reloc with a global symbol matching |
8142 | | any of HASH1, HASH2, HASH3, or HASH4. */ |
8143 | | |
8144 | | static bool |
8145 | | branch_reloc_hash_match (bfd *ibfd, |
8146 | | Elf_Internal_Rela *rel, |
8147 | | struct ppc_link_hash_entry *hash1, |
8148 | | struct ppc_link_hash_entry *hash2, |
8149 | | struct ppc_link_hash_entry *hash3, |
8150 | | struct ppc_link_hash_entry *hash4) |
8151 | 0 | { |
8152 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd); |
8153 | 0 | enum elf_ppc64_reloc_type r_type = ELF64_R_TYPE (rel->r_info); |
8154 | 0 | unsigned int r_symndx = ELF64_R_SYM (rel->r_info); |
8155 | |
|
8156 | 0 | if (r_symndx >= symtab_hdr->sh_info && is_branch_reloc (r_type)) |
8157 | 0 | { |
8158 | 0 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
8159 | 0 | struct elf_link_hash_entry *h; |
8160 | |
|
8161 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
8162 | 0 | h = elf_follow_link (h); |
8163 | 0 | if (h == elf_hash_entry (hash1) |
8164 | 0 | || h == elf_hash_entry (hash2) |
8165 | 0 | || h == elf_hash_entry (hash3) |
8166 | 0 | || h == elf_hash_entry (hash4)) |
8167 | 0 | return true; |
8168 | 0 | } |
8169 | 0 | return false; |
8170 | 0 | } |
8171 | | |
8172 | | /* Run through all the TLS relocs looking for optimization |
8173 | | opportunities. The linker has been hacked (see ppc64elf.em) to do |
8174 | | a preliminary section layout so that we know the TLS segment |
8175 | | offsets. We can't optimize earlier because some optimizations need |
8176 | | to know the tp offset, and we need to optimize before allocating |
8177 | | dynamic relocations. */ |
8178 | | |
8179 | | bool |
8180 | | ppc64_elf_tls_optimize (struct bfd_link_info *info) |
8181 | 0 | { |
8182 | 0 | bfd *ibfd; |
8183 | 0 | asection *sec; |
8184 | 0 | struct ppc_link_hash_table *htab; |
8185 | 0 | unsigned char *toc_ref; |
8186 | 0 | int pass; |
8187 | |
|
8188 | 0 | if (!bfd_link_executable (info)) |
8189 | 0 | return true; |
8190 | | |
8191 | 0 | htab = ppc_hash_table (info); |
8192 | 0 | if (htab == NULL) |
8193 | 0 | return false; |
8194 | | |
8195 | 0 | htab->do_tls_opt = 1; |
8196 | | |
8197 | | /* Make two passes over the relocs. On the first pass, mark toc |
8198 | | entries involved with tls relocs, and check that tls relocs |
8199 | | involved in setting up a tls_get_addr call are indeed followed by |
8200 | | such a call. If they are not, we can't do any tls optimization. |
8201 | | On the second pass twiddle tls_mask flags to notify |
8202 | | relocate_section that optimization can be done, and adjust got |
8203 | | and plt refcounts. */ |
8204 | 0 | toc_ref = NULL; |
8205 | 0 | for (pass = 0; pass < 2; ++pass) |
8206 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
8207 | 0 | { |
8208 | 0 | Elf_Internal_Sym *locsyms = NULL; |
8209 | 0 | asection *toc = bfd_get_section_by_name (ibfd, ".toc"); |
8210 | |
|
8211 | 0 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
8212 | 0 | if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
8213 | 0 | { |
8214 | 0 | Elf_Internal_Rela *relstart, *rel, *relend; |
8215 | 0 | bool found_tls_get_addr_arg = 0; |
8216 | | |
8217 | | /* Read the relocations. */ |
8218 | 0 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
8219 | 0 | info->keep_memory); |
8220 | 0 | if (relstart == NULL) |
8221 | 0 | { |
8222 | 0 | free (toc_ref); |
8223 | 0 | return false; |
8224 | 0 | } |
8225 | | |
8226 | 0 | relend = relstart + sec->reloc_count; |
8227 | 0 | for (rel = relstart; rel < relend; rel++) |
8228 | 0 | { |
8229 | 0 | enum elf_ppc64_reloc_type r_type; |
8230 | 0 | unsigned long r_symndx; |
8231 | 0 | struct elf_link_hash_entry *h; |
8232 | 0 | Elf_Internal_Sym *sym; |
8233 | 0 | asection *sym_sec; |
8234 | 0 | unsigned char *tls_mask; |
8235 | 0 | unsigned int tls_set, tls_clear, tls_type = 0; |
8236 | 0 | bfd_vma value; |
8237 | 0 | bool ok_tprel, is_local; |
8238 | 0 | long toc_ref_index = 0; |
8239 | 0 | int expecting_tls_get_addr = 0; |
8240 | 0 | bool ret = false; |
8241 | |
|
8242 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
8243 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, |
8244 | 0 | r_symndx, ibfd)) |
8245 | 0 | { |
8246 | 0 | err_free_rel: |
8247 | 0 | if (elf_section_data (sec)->relocs != relstart) |
8248 | 0 | free (relstart); |
8249 | 0 | free (toc_ref); |
8250 | 0 | if (elf_symtab_hdr (ibfd).contents |
8251 | 0 | != (unsigned char *) locsyms) |
8252 | 0 | free (locsyms); |
8253 | 0 | return ret; |
8254 | 0 | } |
8255 | | |
8256 | 0 | if (h != NULL) |
8257 | 0 | { |
8258 | 0 | if (h->root.type == bfd_link_hash_defined |
8259 | 0 | || h->root.type == bfd_link_hash_defweak) |
8260 | 0 | value = h->root.u.def.value; |
8261 | 0 | else if (h->root.type == bfd_link_hash_undefweak) |
8262 | 0 | value = 0; |
8263 | 0 | else |
8264 | 0 | { |
8265 | 0 | found_tls_get_addr_arg = 0; |
8266 | 0 | continue; |
8267 | 0 | } |
8268 | 0 | } |
8269 | 0 | else |
8270 | | /* Symbols referenced by TLS relocs must be of type |
8271 | | STT_TLS. So no need for .opd local sym adjust. */ |
8272 | 0 | value = sym->st_value; |
8273 | | |
8274 | 0 | ok_tprel = false; |
8275 | 0 | is_local = SYMBOL_REFERENCES_LOCAL (info, h); |
8276 | 0 | if (is_local) |
8277 | 0 | { |
8278 | 0 | if (h != NULL |
8279 | 0 | && h->root.type == bfd_link_hash_undefweak) |
8280 | 0 | ok_tprel = true; |
8281 | 0 | else if (sym_sec != NULL |
8282 | 0 | && sym_sec->output_section != NULL) |
8283 | 0 | { |
8284 | 0 | value += sym_sec->output_offset; |
8285 | 0 | value += sym_sec->output_section->vma; |
8286 | 0 | value -= htab->elf.tls_sec->vma + TP_OFFSET; |
8287 | | /* Note that even though the prefix insns |
8288 | | allow a 1<<33 offset we use the same test |
8289 | | as for addis;addi. There may be a mix of |
8290 | | pcrel and non-pcrel code and the decision |
8291 | | to optimise is per symbol, not per TLS |
8292 | | sequence. */ |
8293 | 0 | ok_tprel = value + 0x80008000ULL < 1ULL << 32; |
8294 | 0 | } |
8295 | 0 | } |
8296 | |
|
8297 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
8298 | | /* If this section has old-style __tls_get_addr calls |
8299 | | without marker relocs, then check that each |
8300 | | __tls_get_addr call reloc is preceded by a reloc |
8301 | | that conceivably belongs to the __tls_get_addr arg |
8302 | | setup insn. If we don't find matching arg setup |
8303 | | relocs, don't do any tls optimization. */ |
8304 | 0 | if (pass == 0 |
8305 | 0 | && sec->nomark_tls_get_addr |
8306 | 0 | && h != NULL |
8307 | 0 | && is_tls_get_addr (h, htab) |
8308 | 0 | && !found_tls_get_addr_arg |
8309 | 0 | && is_branch_reloc (r_type)) |
8310 | 0 | { |
8311 | 0 | info->callbacks->minfo (_("%H __tls_get_addr lost arg, " |
8312 | 0 | "TLS optimization disabled\n"), |
8313 | 0 | ibfd, sec, rel->r_offset); |
8314 | 0 | ret = true; |
8315 | 0 | goto err_free_rel; |
8316 | 0 | } |
8317 | | |
8318 | 0 | found_tls_get_addr_arg = 0; |
8319 | 0 | switch (r_type) |
8320 | 0 | { |
8321 | 0 | case R_PPC64_GOT_TLSLD16: |
8322 | 0 | case R_PPC64_GOT_TLSLD16_LO: |
8323 | 0 | case R_PPC64_GOT_TLSLD_PCREL34: |
8324 | 0 | expecting_tls_get_addr = 1; |
8325 | 0 | found_tls_get_addr_arg = 1; |
8326 | | /* Fall through. */ |
8327 | |
|
8328 | 0 | case R_PPC64_GOT_TLSLD16_HI: |
8329 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
8330 | | /* These relocs should never be against a symbol |
8331 | | defined in a shared lib. Leave them alone if |
8332 | | that turns out to be the case. */ |
8333 | 0 | if (!is_local) |
8334 | 0 | continue; |
8335 | | |
8336 | | /* LD -> LE */ |
8337 | 0 | tls_set = 0; |
8338 | 0 | tls_clear = TLS_LD; |
8339 | 0 | tls_type = TLS_TLS | TLS_LD; |
8340 | 0 | break; |
8341 | | |
8342 | 0 | case R_PPC64_GOT_TLSGD16: |
8343 | 0 | case R_PPC64_GOT_TLSGD16_LO: |
8344 | 0 | case R_PPC64_GOT_TLSGD_PCREL34: |
8345 | 0 | expecting_tls_get_addr = 1; |
8346 | 0 | found_tls_get_addr_arg = 1; |
8347 | | /* Fall through. */ |
8348 | |
|
8349 | 0 | case R_PPC64_GOT_TLSGD16_HI: |
8350 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
8351 | 0 | if (ok_tprel) |
8352 | | /* GD -> LE */ |
8353 | 0 | tls_set = 0; |
8354 | 0 | else |
8355 | | /* GD -> IE */ |
8356 | 0 | tls_set = TLS_TLS | TLS_GDIE; |
8357 | 0 | tls_clear = TLS_GD; |
8358 | 0 | tls_type = TLS_TLS | TLS_GD; |
8359 | 0 | break; |
8360 | | |
8361 | 0 | case R_PPC64_GOT_TPREL_PCREL34: |
8362 | 0 | case R_PPC64_GOT_TPREL16_DS: |
8363 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
8364 | 0 | case R_PPC64_GOT_TPREL16_HI: |
8365 | 0 | case R_PPC64_GOT_TPREL16_HA: |
8366 | 0 | if (ok_tprel) |
8367 | 0 | { |
8368 | | /* IE -> LE */ |
8369 | 0 | tls_set = 0; |
8370 | 0 | tls_clear = TLS_TPREL; |
8371 | 0 | tls_type = TLS_TLS | TLS_TPREL; |
8372 | 0 | break; |
8373 | 0 | } |
8374 | 0 | continue; |
8375 | | |
8376 | 0 | case R_PPC64_TLSLD: |
8377 | 0 | if (!is_local) |
8378 | 0 | continue; |
8379 | | /* Fall through. */ |
8380 | 0 | case R_PPC64_TLSGD: |
8381 | 0 | if (rel + 1 < relend |
8382 | 0 | && is_plt_seq_reloc (ELF64_R_TYPE (rel[1].r_info))) |
8383 | 0 | { |
8384 | 0 | if (pass != 0 |
8385 | 0 | && (ELF64_R_TYPE (rel[1].r_info) |
8386 | 0 | != R_PPC64_PLTSEQ) |
8387 | 0 | && (ELF64_R_TYPE (rel[1].r_info) |
8388 | 0 | != R_PPC64_PLTSEQ_NOTOC)) |
8389 | 0 | { |
8390 | 0 | r_symndx = ELF64_R_SYM (rel[1].r_info); |
8391 | 0 | if (!get_sym_h (&h, NULL, NULL, NULL, &locsyms, |
8392 | 0 | r_symndx, ibfd)) |
8393 | 0 | goto err_free_rel; |
8394 | 0 | if (h != NULL) |
8395 | 0 | { |
8396 | 0 | struct plt_entry *ent = NULL; |
8397 | |
|
8398 | 0 | for (ent = h->plt.plist; |
8399 | 0 | ent != NULL; |
8400 | 0 | ent = ent->next) |
8401 | 0 | if (ent->addend == rel[1].r_addend) |
8402 | 0 | break; |
8403 | |
|
8404 | 0 | if (ent != NULL |
8405 | 0 | && ent->plt.refcount > 0) |
8406 | 0 | ent->plt.refcount -= 1; |
8407 | 0 | } |
8408 | 0 | } |
8409 | 0 | continue; |
8410 | 0 | } |
8411 | 0 | found_tls_get_addr_arg = 1; |
8412 | | /* Fall through. */ |
8413 | |
|
8414 | 0 | case R_PPC64_TLS: |
8415 | 0 | case R_PPC64_TOC16: |
8416 | 0 | case R_PPC64_TOC16_LO: |
8417 | 0 | if (sym_sec == NULL || sym_sec != toc) |
8418 | 0 | continue; |
8419 | | |
8420 | | /* Mark this toc entry as referenced by a TLS |
8421 | | code sequence. We can do that now in the |
8422 | | case of R_PPC64_TLS, and after checking for |
8423 | | tls_get_addr for the TOC16 relocs. */ |
8424 | 0 | if (toc_ref == NULL) |
8425 | 0 | toc_ref |
8426 | 0 | = bfd_zmalloc (toc->output_section->rawsize / 8); |
8427 | 0 | if (toc_ref == NULL) |
8428 | 0 | goto err_free_rel; |
8429 | | |
8430 | 0 | if (h != NULL) |
8431 | 0 | value = h->root.u.def.value; |
8432 | 0 | else |
8433 | 0 | value = sym->st_value; |
8434 | 0 | value += rel->r_addend; |
8435 | 0 | if (value % 8 != 0) |
8436 | 0 | continue; |
8437 | 0 | BFD_ASSERT (value < toc->size |
8438 | 0 | && toc->output_offset % 8 == 0); |
8439 | 0 | toc_ref_index = (value + toc->output_offset) / 8; |
8440 | 0 | if (r_type == R_PPC64_TLS |
8441 | 0 | || r_type == R_PPC64_TLSGD |
8442 | 0 | || r_type == R_PPC64_TLSLD) |
8443 | 0 | { |
8444 | 0 | toc_ref[toc_ref_index] = 1; |
8445 | 0 | continue; |
8446 | 0 | } |
8447 | | |
8448 | 0 | if (pass != 0 && toc_ref[toc_ref_index] == 0) |
8449 | 0 | continue; |
8450 | | |
8451 | 0 | tls_set = 0; |
8452 | 0 | tls_clear = 0; |
8453 | 0 | expecting_tls_get_addr = 2; |
8454 | 0 | break; |
8455 | | |
8456 | 0 | case R_PPC64_TPREL64: |
8457 | 0 | if (pass == 0 |
8458 | 0 | || sec != toc |
8459 | 0 | || toc_ref == NULL |
8460 | 0 | || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) |
8461 | 0 | continue; |
8462 | 0 | if (ok_tprel) |
8463 | 0 | { |
8464 | | /* IE -> LE */ |
8465 | 0 | tls_set = TLS_EXPLICIT; |
8466 | 0 | tls_clear = TLS_TPREL; |
8467 | 0 | break; |
8468 | 0 | } |
8469 | 0 | continue; |
8470 | | |
8471 | 0 | case R_PPC64_DTPMOD64: |
8472 | 0 | if (pass == 0 |
8473 | 0 | || sec != toc |
8474 | 0 | || toc_ref == NULL |
8475 | 0 | || !toc_ref[(rel->r_offset + toc->output_offset) / 8]) |
8476 | 0 | continue; |
8477 | 0 | if (rel + 1 < relend |
8478 | 0 | && (rel[1].r_info |
8479 | 0 | == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) |
8480 | 0 | && rel[1].r_offset == rel->r_offset + 8) |
8481 | 0 | { |
8482 | 0 | if (ok_tprel) |
8483 | | /* GD -> LE */ |
8484 | 0 | tls_set = TLS_EXPLICIT | TLS_GD; |
8485 | 0 | else |
8486 | | /* GD -> IE */ |
8487 | 0 | tls_set = TLS_EXPLICIT | TLS_GD | TLS_GDIE; |
8488 | 0 | tls_clear = TLS_GD; |
8489 | 0 | } |
8490 | 0 | else |
8491 | 0 | { |
8492 | 0 | if (!is_local) |
8493 | 0 | continue; |
8494 | | |
8495 | | /* LD -> LE */ |
8496 | 0 | tls_set = TLS_EXPLICIT; |
8497 | 0 | tls_clear = TLS_LD; |
8498 | 0 | } |
8499 | 0 | break; |
8500 | | |
8501 | 0 | case R_PPC64_TPREL16_HA: |
8502 | 0 | if (pass == 0) |
8503 | 0 | { |
8504 | 0 | unsigned char buf[4]; |
8505 | 0 | unsigned int insn; |
8506 | 0 | bfd_vma off = rel->r_offset & ~3; |
8507 | 0 | if (!bfd_get_section_contents (ibfd, sec, buf, |
8508 | 0 | off, 4)) |
8509 | 0 | goto err_free_rel; |
8510 | 0 | insn = bfd_get_32 (ibfd, buf); |
8511 | | /* addis rt,13,imm */ |
8512 | 0 | if ((insn & ((0x3fu << 26) | 0x1f << 16)) |
8513 | 0 | != ((15u << 26) | (13 << 16))) |
8514 | 0 | { |
8515 | | /* xgettext:c-format */ |
8516 | 0 | info->callbacks->minfo |
8517 | 0 | (_("%H: warning: %s unexpected insn %#x.\n"), |
8518 | 0 | ibfd, sec, off, "R_PPC64_TPREL16_HA", insn); |
8519 | 0 | htab->do_tls_opt = 0; |
8520 | 0 | } |
8521 | 0 | } |
8522 | 0 | continue; |
8523 | | |
8524 | 0 | case R_PPC64_TPREL16_HI: |
8525 | 0 | case R_PPC64_TPREL16_HIGH: |
8526 | 0 | case R_PPC64_TPREL16_HIGHA: |
8527 | 0 | case R_PPC64_TPREL16_HIGHER: |
8528 | 0 | case R_PPC64_TPREL16_HIGHERA: |
8529 | 0 | case R_PPC64_TPREL16_HIGHEST: |
8530 | 0 | case R_PPC64_TPREL16_HIGHESTA: |
8531 | | /* These can all be used in sequences along with |
8532 | | TPREL16_LO or TPREL16_LO_DS in ways we aren't |
8533 | | able to verify easily. */ |
8534 | 0 | htab->do_tls_opt = 0; |
8535 | 0 | continue; |
8536 | | |
8537 | 0 | default: |
8538 | 0 | continue; |
8539 | 0 | } |
8540 | | |
8541 | 0 | if (pass == 0) |
8542 | 0 | { |
8543 | 0 | if (!expecting_tls_get_addr |
8544 | 0 | || !sec->nomark_tls_get_addr) |
8545 | 0 | continue; |
8546 | | |
8547 | 0 | if (rel + 1 < relend |
8548 | 0 | && branch_reloc_hash_match (ibfd, rel + 1, |
8549 | 0 | htab->tls_get_addr_fd, |
8550 | 0 | htab->tga_desc_fd, |
8551 | 0 | htab->tls_get_addr, |
8552 | 0 | htab->tga_desc)) |
8553 | 0 | { |
8554 | 0 | if (expecting_tls_get_addr == 2) |
8555 | 0 | { |
8556 | | /* Check for toc tls entries. */ |
8557 | 0 | unsigned char *toc_tls; |
8558 | 0 | int retval; |
8559 | |
|
8560 | 0 | retval = get_tls_mask (&toc_tls, NULL, NULL, |
8561 | 0 | &locsyms, |
8562 | 0 | rel, ibfd); |
8563 | 0 | if (retval == 0) |
8564 | 0 | goto err_free_rel; |
8565 | 0 | if (toc_tls != NULL) |
8566 | 0 | { |
8567 | 0 | if ((*toc_tls & TLS_TLS) != 0 |
8568 | 0 | && ((*toc_tls & (TLS_GD | TLS_LD)) != 0)) |
8569 | 0 | found_tls_get_addr_arg = 1; |
8570 | 0 | if (retval > 1) |
8571 | 0 | toc_ref[toc_ref_index] = 1; |
8572 | 0 | } |
8573 | 0 | } |
8574 | 0 | continue; |
8575 | 0 | } |
8576 | | |
8577 | | /* Uh oh, we didn't find the expected call. We |
8578 | | could just mark this symbol to exclude it |
8579 | | from tls optimization but it's safer to skip |
8580 | | the entire optimization. */ |
8581 | | /* xgettext:c-format */ |
8582 | 0 | info->callbacks->minfo (_("%H arg lost __tls_get_addr, " |
8583 | 0 | "TLS optimization disabled\n"), |
8584 | 0 | ibfd, sec, rel->r_offset); |
8585 | 0 | ret = true; |
8586 | 0 | goto err_free_rel; |
8587 | 0 | } |
8588 | | |
8589 | | /* If we don't have old-style __tls_get_addr calls |
8590 | | without TLSGD/TLSLD marker relocs, and we haven't |
8591 | | found a new-style __tls_get_addr call with a |
8592 | | marker for this symbol, then we either have a |
8593 | | broken object file or an -mlongcall style |
8594 | | indirect call to __tls_get_addr without a marker. |
8595 | | Disable optimization in this case. */ |
8596 | 0 | if ((tls_clear & (TLS_GD | TLS_LD)) != 0 |
8597 | 0 | && (tls_set & TLS_EXPLICIT) == 0 |
8598 | 0 | && !sec->nomark_tls_get_addr |
8599 | 0 | && ((*tls_mask & (TLS_TLS | TLS_MARK)) |
8600 | 0 | != (TLS_TLS | TLS_MARK))) |
8601 | 0 | continue; |
8602 | | |
8603 | 0 | if (expecting_tls_get_addr == 1 + !sec->nomark_tls_get_addr) |
8604 | 0 | { |
8605 | 0 | struct plt_entry *ent = NULL; |
8606 | |
|
8607 | 0 | if (htab->tls_get_addr_fd != NULL) |
8608 | 0 | for (ent = htab->tls_get_addr_fd->elf.plt.plist; |
8609 | 0 | ent != NULL; |
8610 | 0 | ent = ent->next) |
8611 | 0 | if (ent->addend == 0) |
8612 | 0 | break; |
8613 | |
|
8614 | 0 | if (ent == NULL && htab->tga_desc_fd != NULL) |
8615 | 0 | for (ent = htab->tga_desc_fd->elf.plt.plist; |
8616 | 0 | ent != NULL; |
8617 | 0 | ent = ent->next) |
8618 | 0 | if (ent->addend == 0) |
8619 | 0 | break; |
8620 | |
|
8621 | 0 | if (ent == NULL && htab->tls_get_addr != NULL) |
8622 | 0 | for (ent = htab->tls_get_addr->elf.plt.plist; |
8623 | 0 | ent != NULL; |
8624 | 0 | ent = ent->next) |
8625 | 0 | if (ent->addend == 0) |
8626 | 0 | break; |
8627 | |
|
8628 | 0 | if (ent == NULL && htab->tga_desc != NULL) |
8629 | 0 | for (ent = htab->tga_desc->elf.plt.plist; |
8630 | 0 | ent != NULL; |
8631 | 0 | ent = ent->next) |
8632 | 0 | if (ent->addend == 0) |
8633 | 0 | break; |
8634 | |
|
8635 | 0 | if (ent != NULL |
8636 | 0 | && ent->plt.refcount > 0) |
8637 | 0 | ent->plt.refcount -= 1; |
8638 | 0 | } |
8639 | |
|
8640 | 0 | if (tls_clear == 0) |
8641 | 0 | continue; |
8642 | | |
8643 | 0 | if ((tls_set & TLS_EXPLICIT) == 0) |
8644 | 0 | { |
8645 | 0 | struct got_entry *ent; |
8646 | | |
8647 | | /* Adjust got entry for this reloc. */ |
8648 | 0 | if (h != NULL) |
8649 | 0 | ent = h->got.glist; |
8650 | 0 | else |
8651 | 0 | ent = elf_local_got_ents (ibfd)[r_symndx]; |
8652 | |
|
8653 | 0 | for (; ent != NULL; ent = ent->next) |
8654 | 0 | if (ent->addend == rel->r_addend |
8655 | 0 | && ent->owner == ibfd |
8656 | 0 | && ent->tls_type == tls_type) |
8657 | 0 | break; |
8658 | 0 | if (ent == NULL) |
8659 | 0 | abort (); |
8660 | | |
8661 | 0 | if (tls_set == 0) |
8662 | 0 | { |
8663 | | /* We managed to get rid of a got entry. */ |
8664 | 0 | if (ent->got.refcount > 0) |
8665 | 0 | ent->got.refcount -= 1; |
8666 | 0 | } |
8667 | 0 | } |
8668 | 0 | else |
8669 | 0 | { |
8670 | | /* If we got rid of a DTPMOD/DTPREL reloc pair then |
8671 | | we'll lose one or two dyn relocs. */ |
8672 | 0 | if (!dec_dynrel_count (rel, sec, info, |
8673 | 0 | NULL, h, sym)) |
8674 | 0 | return false; |
8675 | | |
8676 | 0 | if (tls_set == (TLS_EXPLICIT | TLS_GD)) |
8677 | 0 | { |
8678 | 0 | if (!dec_dynrel_count (rel + 1, sec, info, |
8679 | 0 | NULL, h, sym)) |
8680 | 0 | return false; |
8681 | 0 | } |
8682 | 0 | } |
8683 | | |
8684 | 0 | *tls_mask |= tls_set & 0xff; |
8685 | 0 | *tls_mask &= ~tls_clear; |
8686 | 0 | } |
8687 | | |
8688 | 0 | if (elf_section_data (sec)->relocs != relstart) |
8689 | 0 | free (relstart); |
8690 | 0 | } |
8691 | | |
8692 | 0 | if (locsyms != NULL |
8693 | 0 | && (elf_symtab_hdr (ibfd).contents != (unsigned char *) locsyms)) |
8694 | 0 | { |
8695 | 0 | if (!info->keep_memory) |
8696 | 0 | free (locsyms); |
8697 | 0 | else |
8698 | 0 | elf_symtab_hdr (ibfd).contents = (unsigned char *) locsyms; |
8699 | 0 | } |
8700 | 0 | } |
8701 | | |
8702 | 0 | free (toc_ref); |
8703 | 0 | return true; |
8704 | 0 | } |
8705 | | |
8706 | | /* Called via elf_link_hash_traverse from ppc64_elf_edit_toc to adjust |
8707 | | the values of any global symbols in a toc section that has been |
8708 | | edited. Globals in toc sections should be a rarity, so this function |
8709 | | sets a flag if any are found in toc sections other than the one just |
8710 | | edited, so that further hash table traversals can be avoided. */ |
8711 | | |
8712 | | struct adjust_toc_info |
8713 | | { |
8714 | | asection *toc; |
8715 | | unsigned long *skip; |
8716 | | bool global_toc_syms; |
8717 | | }; |
8718 | | |
8719 | | enum toc_skip_enum { ref_from_discarded = 1, can_optimize = 2 }; |
8720 | | |
8721 | | static bool |
8722 | | adjust_toc_syms (struct elf_link_hash_entry *h, void *inf) |
8723 | 0 | { |
8724 | 0 | struct ppc_link_hash_entry *eh; |
8725 | 0 | struct adjust_toc_info *toc_inf = (struct adjust_toc_info *) inf; |
8726 | 0 | unsigned long i; |
8727 | |
|
8728 | 0 | if (h->root.type != bfd_link_hash_defined |
8729 | 0 | && h->root.type != bfd_link_hash_defweak) |
8730 | 0 | return true; |
8731 | | |
8732 | 0 | eh = ppc_elf_hash_entry (h); |
8733 | 0 | if (eh->adjust_done) |
8734 | 0 | return true; |
8735 | | |
8736 | 0 | if (eh->elf.root.u.def.section == toc_inf->toc) |
8737 | 0 | { |
8738 | 0 | if (eh->elf.root.u.def.value > toc_inf->toc->rawsize) |
8739 | 0 | i = toc_inf->toc->rawsize >> 3; |
8740 | 0 | else |
8741 | 0 | i = eh->elf.root.u.def.value >> 3; |
8742 | |
|
8743 | 0 | if ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0) |
8744 | 0 | { |
8745 | 0 | _bfd_error_handler |
8746 | 0 | (_("%s defined on removed toc entry"), eh->elf.root.root.string); |
8747 | 0 | do |
8748 | 0 | ++i; |
8749 | 0 | while ((toc_inf->skip[i] & (ref_from_discarded | can_optimize)) != 0); |
8750 | 0 | eh->elf.root.u.def.value = (bfd_vma) i << 3; |
8751 | 0 | } |
8752 | |
|
8753 | 0 | eh->elf.root.u.def.value -= toc_inf->skip[i]; |
8754 | 0 | eh->adjust_done = 1; |
8755 | 0 | } |
8756 | 0 | else if (strcmp (eh->elf.root.u.def.section->name, ".toc") == 0) |
8757 | 0 | toc_inf->global_toc_syms = true; |
8758 | |
|
8759 | 0 | return true; |
8760 | 0 | } |
8761 | | |
8762 | | /* Return TRUE iff INSN with a relocation of R_TYPE is one we expect |
8763 | | on a _LO variety toc/got reloc. */ |
8764 | | |
8765 | | static bool |
8766 | | ok_lo_toc_insn (unsigned int insn, enum elf_ppc64_reloc_type r_type) |
8767 | 0 | { |
8768 | 0 | return ((insn & (0x3fu << 26)) == 12u << 26 /* addic */ |
8769 | 0 | || (insn & (0x3fu << 26)) == 14u << 26 /* addi */ |
8770 | 0 | || (insn & (0x3fu << 26)) == 32u << 26 /* lwz */ |
8771 | 0 | || (insn & (0x3fu << 26)) == 34u << 26 /* lbz */ |
8772 | 0 | || (insn & (0x3fu << 26)) == 36u << 26 /* stw */ |
8773 | 0 | || (insn & (0x3fu << 26)) == 38u << 26 /* stb */ |
8774 | 0 | || (insn & (0x3fu << 26)) == 40u << 26 /* lhz */ |
8775 | 0 | || (insn & (0x3fu << 26)) == 42u << 26 /* lha */ |
8776 | 0 | || (insn & (0x3fu << 26)) == 44u << 26 /* sth */ |
8777 | 0 | || (insn & (0x3fu << 26)) == 46u << 26 /* lmw */ |
8778 | 0 | || (insn & (0x3fu << 26)) == 47u << 26 /* stmw */ |
8779 | 0 | || (insn & (0x3fu << 26)) == 48u << 26 /* lfs */ |
8780 | 0 | || (insn & (0x3fu << 26)) == 50u << 26 /* lfd */ |
8781 | 0 | || (insn & (0x3fu << 26)) == 52u << 26 /* stfs */ |
8782 | 0 | || (insn & (0x3fu << 26)) == 54u << 26 /* stfd */ |
8783 | 0 | || (insn & (0x3fu << 26)) == 56u << 26 /* lq,lfq */ |
8784 | 0 | || ((insn & (0x3fu << 26)) == 57u << 26 /* lxsd,lxssp,lfdp */ |
8785 | | /* Exclude lfqu by testing reloc. If relocs are ever |
8786 | | defined for the reduced D field in psq_lu then those |
8787 | | will need testing too. */ |
8788 | 0 | && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO) |
8789 | 0 | || ((insn & (0x3fu << 26)) == 58u << 26 /* ld,lwa */ |
8790 | 0 | && (insn & 1) == 0) |
8791 | 0 | || (insn & (0x3fu << 26)) == 60u << 26 /* stfq */ |
8792 | 0 | || ((insn & (0x3fu << 26)) == 61u << 26 /* lxv,stx{v,sd,ssp},stfdp */ |
8793 | | /* Exclude stfqu. psq_stu as above for psq_lu. */ |
8794 | 0 | && r_type != R_PPC64_TOC16_LO && r_type != R_PPC64_GOT16_LO) |
8795 | 0 | || ((insn & (0x3fu << 26)) == 62u << 26 /* std,stq */ |
8796 | 0 | && (insn & 1) == 0)); |
8797 | 0 | } |
8798 | | |
8799 | | /* PCREL_OPT in one instance flags to the linker that a pair of insns: |
8800 | | pld ra,symbol@got@pcrel |
8801 | | load/store rt,off(ra) |
8802 | | or |
8803 | | pla ra,symbol@pcrel |
8804 | | load/store rt,off(ra) |
8805 | | may be translated to |
8806 | | pload/pstore rt,symbol+off@pcrel |
8807 | | nop. |
8808 | | This function returns true if the optimization is possible, placing |
8809 | | the prefix insn in *PINSN1, a NOP in *PINSN2 and the offset in *POFF. |
8810 | | |
8811 | | On entry to this function, the linker has already determined that |
8812 | | the pld can be replaced with pla: *PINSN1 is that pla insn, |
8813 | | while *PINSN2 is the second instruction. */ |
8814 | | |
8815 | | static bool |
8816 | | xlate_pcrel_opt (uint64_t *pinsn1, uint64_t *pinsn2, bfd_signed_vma *poff) |
8817 | 0 | { |
8818 | 0 | uint64_t insn1 = *pinsn1; |
8819 | 0 | uint64_t insn2 = *pinsn2; |
8820 | 0 | bfd_signed_vma off; |
8821 | |
|
8822 | 0 | if ((insn2 & (63ULL << 58)) == 1ULL << 58) |
8823 | 0 | { |
8824 | | /* Check that regs match. */ |
8825 | 0 | if (((insn2 >> 16) & 31) != ((insn1 >> 21) & 31)) |
8826 | 0 | return false; |
8827 | | |
8828 | | /* P8LS or PMLS form, non-pcrel. */ |
8829 | 0 | if ((insn2 & (-1ULL << 50) & ~(1ULL << 56)) != (1ULL << 58)) |
8830 | 0 | return false; |
8831 | | |
8832 | 0 | *pinsn1 = (insn2 & ~(31 << 16) & ~0x3ffff0000ffffULL) | (1ULL << 52); |
8833 | 0 | *pinsn2 = PNOP; |
8834 | 0 | off = ((insn2 >> 16) & 0x3ffff0000ULL) | (insn2 & 0xffff); |
8835 | 0 | *poff = (off ^ 0x200000000ULL) - 0x200000000ULL; |
8836 | 0 | return true; |
8837 | 0 | } |
8838 | | |
8839 | 0 | insn2 >>= 32; |
8840 | | |
8841 | | /* Check that regs match. */ |
8842 | 0 | if (((insn2 >> 16) & 31) != ((insn1 >> 21) & 31)) |
8843 | 0 | return false; |
8844 | | |
8845 | 0 | switch ((insn2 >> 26) & 63) |
8846 | 0 | { |
8847 | 0 | default: |
8848 | 0 | return false; |
8849 | | |
8850 | 0 | case 32: /* lwz */ |
8851 | 0 | case 34: /* lbz */ |
8852 | 0 | case 36: /* stw */ |
8853 | 0 | case 38: /* stb */ |
8854 | 0 | case 40: /* lhz */ |
8855 | 0 | case 42: /* lha */ |
8856 | 0 | case 44: /* sth */ |
8857 | 0 | case 48: /* lfs */ |
8858 | 0 | case 50: /* lfd */ |
8859 | 0 | case 52: /* stfs */ |
8860 | 0 | case 54: /* stfd */ |
8861 | | /* These are the PMLS cases, where we just need to tack a prefix |
8862 | | on the insn. */ |
8863 | 0 | insn1 = ((1ULL << 58) | (2ULL << 56) | (1ULL << 52) |
8864 | 0 | | (insn2 & ((63ULL << 26) | (31ULL << 21)))); |
8865 | 0 | off = insn2 & 0xffff; |
8866 | 0 | break; |
8867 | | |
8868 | 0 | case 58: /* lwa, ld */ |
8869 | 0 | if ((insn2 & 1) != 0) |
8870 | 0 | return false; |
8871 | 0 | insn1 = ((1ULL << 58) | (1ULL << 52) |
8872 | 0 | | (insn2 & 2 ? 41ULL << 26 : 57ULL << 26) |
8873 | 0 | | (insn2 & (31ULL << 21))); |
8874 | 0 | off = insn2 & 0xfffc; |
8875 | 0 | break; |
8876 | | |
8877 | 0 | case 57: /* lxsd, lxssp */ |
8878 | 0 | if ((insn2 & 3) < 2) |
8879 | 0 | return false; |
8880 | 0 | insn1 = ((1ULL << 58) | (1ULL << 52) |
8881 | 0 | | ((40ULL | (insn2 & 3)) << 26) |
8882 | 0 | | (insn2 & (31ULL << 21))); |
8883 | 0 | off = insn2 & 0xfffc; |
8884 | 0 | break; |
8885 | | |
8886 | 0 | case 61: /* stxsd, stxssp, lxv, stxv */ |
8887 | 0 | if ((insn2 & 3) == 0) |
8888 | 0 | return false; |
8889 | 0 | else if ((insn2 & 3) >= 2) |
8890 | 0 | { |
8891 | 0 | insn1 = ((1ULL << 58) | (1ULL << 52) |
8892 | 0 | | ((44ULL | (insn2 & 3)) << 26) |
8893 | 0 | | (insn2 & (31ULL << 21))); |
8894 | 0 | off = insn2 & 0xfffc; |
8895 | 0 | } |
8896 | 0 | else |
8897 | 0 | { |
8898 | 0 | insn1 = ((1ULL << 58) | (1ULL << 52) |
8899 | 0 | | ((50ULL | (insn2 & 4) | ((insn2 & 8) >> 3)) << 26) |
8900 | 0 | | (insn2 & (31ULL << 21))); |
8901 | 0 | off = insn2 & 0xfff0; |
8902 | 0 | } |
8903 | 0 | break; |
8904 | | |
8905 | 0 | case 56: /* lq */ |
8906 | 0 | insn1 = ((1ULL << 58) | (1ULL << 52) |
8907 | 0 | | (insn2 & ((63ULL << 26) | (31ULL << 21)))); |
8908 | 0 | off = insn2 & 0xffff; |
8909 | 0 | break; |
8910 | | |
8911 | 0 | case 6: /* lxvp, stxvp */ |
8912 | 0 | if ((insn2 & 0xe) != 0) |
8913 | 0 | return false; |
8914 | 0 | insn1 = ((1ULL << 58) | (1ULL << 52) |
8915 | 0 | | ((insn2 & 1) == 0 ? 58ULL << 26 : 62ULL << 26) |
8916 | 0 | | (insn2 & (31ULL << 21))); |
8917 | 0 | off = insn2 & 0xfff0; |
8918 | 0 | break; |
8919 | | |
8920 | 0 | case 62: /* std, stq */ |
8921 | 0 | if ((insn2 & 1) != 0) |
8922 | 0 | return false; |
8923 | 0 | insn1 = ((1ULL << 58) | (1ULL << 52) |
8924 | 0 | | ((insn2 & 2) == 0 ? 61ULL << 26 : 60ULL << 26) |
8925 | 0 | | (insn2 & (31ULL << 21))); |
8926 | 0 | off = insn2 & 0xfffc; |
8927 | 0 | break; |
8928 | 0 | } |
8929 | | |
8930 | 0 | *pinsn1 = insn1; |
8931 | 0 | *pinsn2 = (uint64_t) NOP << 32; |
8932 | 0 | *poff = (off ^ 0x8000) - 0x8000; |
8933 | 0 | return true; |
8934 | 0 | } |
8935 | | |
8936 | | /* Examine all relocs referencing .toc sections in order to remove |
8937 | | unused .toc entries. */ |
8938 | | |
8939 | | bool |
8940 | | ppc64_elf_edit_toc (struct bfd_link_info *info) |
8941 | 0 | { |
8942 | 0 | bfd *ibfd; |
8943 | 0 | struct adjust_toc_info toc_inf; |
8944 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
8945 | |
|
8946 | 0 | htab->do_toc_opt = 1; |
8947 | 0 | toc_inf.global_toc_syms = true; |
8948 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
8949 | 0 | { |
8950 | 0 | asection *toc, *sec; |
8951 | 0 | Elf_Internal_Shdr *symtab_hdr; |
8952 | 0 | Elf_Internal_Sym *local_syms; |
8953 | 0 | Elf_Internal_Rela *relstart, *rel, *toc_relocs; |
8954 | 0 | unsigned long *skip, *drop; |
8955 | 0 | unsigned char *used; |
8956 | 0 | unsigned char *keep, last, some_unused; |
8957 | |
|
8958 | 0 | if (!is_ppc64_elf (ibfd)) |
8959 | 0 | continue; |
8960 | | |
8961 | 0 | toc = bfd_get_section_by_name (ibfd, ".toc"); |
8962 | 0 | if (toc == NULL |
8963 | 0 | || toc->size == 0 |
8964 | 0 | || (toc->flags & SEC_HAS_CONTENTS) == 0 |
8965 | 0 | || toc->sec_info_type == SEC_INFO_TYPE_JUST_SYMS |
8966 | 0 | || discarded_section (toc)) |
8967 | 0 | continue; |
8968 | | |
8969 | 0 | toc_relocs = NULL; |
8970 | 0 | local_syms = NULL; |
8971 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
8972 | | |
8973 | | /* Look at sections dropped from the final link. */ |
8974 | 0 | skip = NULL; |
8975 | 0 | relstart = NULL; |
8976 | 0 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
8977 | 0 | { |
8978 | 0 | if (sec->reloc_count == 0 |
8979 | 0 | || !discarded_section (sec) |
8980 | 0 | || get_opd_info (sec) |
8981 | 0 | || (sec->flags & SEC_ALLOC) == 0 |
8982 | 0 | || (sec->flags & SEC_DEBUGGING) != 0) |
8983 | 0 | continue; |
8984 | | |
8985 | 0 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, false); |
8986 | 0 | if (relstart == NULL) |
8987 | 0 | goto error_ret; |
8988 | | |
8989 | | /* Run through the relocs to see which toc entries might be |
8990 | | unused. */ |
8991 | 0 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
8992 | 0 | { |
8993 | 0 | enum elf_ppc64_reloc_type r_type; |
8994 | 0 | unsigned long r_symndx; |
8995 | 0 | asection *sym_sec; |
8996 | 0 | struct elf_link_hash_entry *h; |
8997 | 0 | Elf_Internal_Sym *sym; |
8998 | 0 | bfd_vma val; |
8999 | |
|
9000 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
9001 | 0 | switch (r_type) |
9002 | 0 | { |
9003 | 0 | default: |
9004 | 0 | continue; |
9005 | | |
9006 | 0 | case R_PPC64_TOC16: |
9007 | 0 | case R_PPC64_TOC16_LO: |
9008 | 0 | case R_PPC64_TOC16_HI: |
9009 | 0 | case R_PPC64_TOC16_HA: |
9010 | 0 | case R_PPC64_TOC16_DS: |
9011 | 0 | case R_PPC64_TOC16_LO_DS: |
9012 | 0 | break; |
9013 | 0 | } |
9014 | | |
9015 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
9016 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
9017 | 0 | r_symndx, ibfd)) |
9018 | 0 | goto error_ret; |
9019 | | |
9020 | 0 | if (sym_sec != toc) |
9021 | 0 | continue; |
9022 | | |
9023 | 0 | if (h != NULL) |
9024 | 0 | val = h->root.u.def.value; |
9025 | 0 | else |
9026 | 0 | val = sym->st_value; |
9027 | 0 | val += rel->r_addend; |
9028 | |
|
9029 | 0 | if (val >= toc->size) |
9030 | 0 | continue; |
9031 | | |
9032 | | /* Anything in the toc ought to be aligned to 8 bytes. |
9033 | | If not, don't mark as unused. */ |
9034 | 0 | if (val & 7) |
9035 | 0 | continue; |
9036 | | |
9037 | 0 | if (skip == NULL) |
9038 | 0 | { |
9039 | 0 | skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); |
9040 | 0 | if (skip == NULL) |
9041 | 0 | goto error_ret; |
9042 | 0 | } |
9043 | | |
9044 | 0 | skip[val >> 3] = ref_from_discarded; |
9045 | 0 | } |
9046 | | |
9047 | 0 | if (elf_section_data (sec)->relocs != relstart) |
9048 | 0 | free (relstart); |
9049 | 0 | } |
9050 | | |
9051 | | /* For largetoc loads of address constants, we can convert |
9052 | | . addis rx,2,addr@got@ha |
9053 | | . ld ry,addr@got@l(rx) |
9054 | | to |
9055 | | . addis rx,2,addr@toc@ha |
9056 | | . addi ry,rx,addr@toc@l |
9057 | | when addr is within 2G of the toc pointer. This then means |
9058 | | that the word storing "addr" in the toc is no longer needed. */ |
9059 | | |
9060 | 0 | if (!ppc64_elf_tdata (ibfd)->has_small_toc_reloc |
9061 | 0 | && toc->output_section->rawsize < (bfd_vma) 1 << 31 |
9062 | 0 | && toc->reloc_count != 0) |
9063 | 0 | { |
9064 | | /* Read toc relocs. */ |
9065 | 0 | toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, |
9066 | 0 | info->keep_memory); |
9067 | 0 | if (toc_relocs == NULL) |
9068 | 0 | goto error_ret; |
9069 | | |
9070 | 0 | for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) |
9071 | 0 | { |
9072 | 0 | enum elf_ppc64_reloc_type r_type; |
9073 | 0 | unsigned long r_symndx; |
9074 | 0 | asection *sym_sec; |
9075 | 0 | struct elf_link_hash_entry *h; |
9076 | 0 | Elf_Internal_Sym *sym; |
9077 | 0 | bfd_vma val, addr; |
9078 | |
|
9079 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
9080 | 0 | if (r_type != R_PPC64_ADDR64) |
9081 | 0 | continue; |
9082 | | |
9083 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
9084 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
9085 | 0 | r_symndx, ibfd)) |
9086 | 0 | goto error_ret; |
9087 | | |
9088 | 0 | if (sym_sec == NULL |
9089 | 0 | || sym_sec->output_section == NULL |
9090 | 0 | || discarded_section (sym_sec)) |
9091 | 0 | continue; |
9092 | | |
9093 | 0 | if (!SYMBOL_REFERENCES_LOCAL (info, h) |
9094 | 0 | || (bfd_link_pic (info) |
9095 | 0 | && sym_sec == bfd_abs_section_ptr)) |
9096 | 0 | continue; |
9097 | | |
9098 | 0 | if (h != NULL) |
9099 | 0 | { |
9100 | 0 | if (h->type == STT_GNU_IFUNC) |
9101 | 0 | continue; |
9102 | 0 | val = h->root.u.def.value; |
9103 | 0 | } |
9104 | 0 | else |
9105 | 0 | { |
9106 | 0 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
9107 | 0 | continue; |
9108 | 0 | val = sym->st_value; |
9109 | 0 | } |
9110 | 0 | val += rel->r_addend; |
9111 | 0 | val += sym_sec->output_section->vma + sym_sec->output_offset; |
9112 | | |
9113 | | /* We don't yet know the exact toc pointer value, but we |
9114 | | know it will be somewhere in the toc section. Don't |
9115 | | optimize if the difference from any possible toc |
9116 | | pointer is outside [ff..f80008000, 7fff7fff]. */ |
9117 | 0 | addr = toc->output_section->vma + TOC_BASE_OFF; |
9118 | 0 | if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) |
9119 | 0 | continue; |
9120 | | |
9121 | 0 | addr = toc->output_section->vma + toc->output_section->rawsize; |
9122 | 0 | if (val - addr + (bfd_vma) 0x80008000 >= (bfd_vma) 1 << 32) |
9123 | 0 | continue; |
9124 | | |
9125 | 0 | if (skip == NULL) |
9126 | 0 | { |
9127 | 0 | skip = bfd_zmalloc (sizeof (*skip) * (toc->size + 15) / 8); |
9128 | 0 | if (skip == NULL) |
9129 | 0 | goto error_ret; |
9130 | 0 | } |
9131 | | |
9132 | 0 | skip[rel->r_offset >> 3] |
9133 | 0 | |= can_optimize | ((rel - toc_relocs) << 2); |
9134 | 0 | } |
9135 | 0 | } |
9136 | | |
9137 | 0 | if (skip == NULL) |
9138 | 0 | continue; |
9139 | | |
9140 | 0 | used = bfd_zmalloc (sizeof (*used) * (toc->size + 7) / 8); |
9141 | 0 | if (used == NULL) |
9142 | 0 | { |
9143 | 0 | error_ret: |
9144 | 0 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
9145 | 0 | free (local_syms); |
9146 | 0 | if (sec != NULL |
9147 | 0 | && elf_section_data (sec)->relocs != relstart) |
9148 | 0 | free (relstart); |
9149 | 0 | if (elf_section_data (toc)->relocs != toc_relocs) |
9150 | 0 | free (toc_relocs); |
9151 | 0 | free (skip); |
9152 | 0 | return false; |
9153 | 0 | } |
9154 | | |
9155 | | /* Now check all kept sections that might reference the toc. |
9156 | | Check the toc itself last. */ |
9157 | 0 | for (sec = (ibfd->sections == toc && toc->next ? toc->next |
9158 | 0 | : ibfd->sections); |
9159 | 0 | sec != NULL; |
9160 | 0 | sec = (sec == toc ? NULL |
9161 | 0 | : sec->next == NULL ? toc |
9162 | 0 | : sec->next == toc && toc->next ? toc->next |
9163 | 0 | : sec->next)) |
9164 | 0 | { |
9165 | 0 | int repeat; |
9166 | |
|
9167 | 0 | if (sec->reloc_count == 0 |
9168 | 0 | || discarded_section (sec) |
9169 | 0 | || get_opd_info (sec) |
9170 | 0 | || (sec->flags & SEC_ALLOC) == 0 |
9171 | 0 | || (sec->flags & SEC_DEBUGGING) != 0) |
9172 | 0 | continue; |
9173 | | |
9174 | 0 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
9175 | 0 | info->keep_memory); |
9176 | 0 | if (relstart == NULL) |
9177 | 0 | { |
9178 | 0 | free (used); |
9179 | 0 | goto error_ret; |
9180 | 0 | } |
9181 | | |
9182 | | /* Mark toc entries referenced as used. */ |
9183 | 0 | do |
9184 | 0 | { |
9185 | 0 | repeat = 0; |
9186 | 0 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
9187 | 0 | { |
9188 | 0 | enum elf_ppc64_reloc_type r_type; |
9189 | 0 | unsigned long r_symndx; |
9190 | 0 | asection *sym_sec; |
9191 | 0 | struct elf_link_hash_entry *h; |
9192 | 0 | Elf_Internal_Sym *sym; |
9193 | 0 | bfd_vma val; |
9194 | |
|
9195 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
9196 | 0 | switch (r_type) |
9197 | 0 | { |
9198 | 0 | case R_PPC64_TOC16: |
9199 | 0 | case R_PPC64_TOC16_LO: |
9200 | 0 | case R_PPC64_TOC16_HI: |
9201 | 0 | case R_PPC64_TOC16_HA: |
9202 | 0 | case R_PPC64_TOC16_DS: |
9203 | 0 | case R_PPC64_TOC16_LO_DS: |
9204 | | /* In case we're taking addresses of toc entries. */ |
9205 | 0 | case R_PPC64_ADDR64: |
9206 | 0 | break; |
9207 | | |
9208 | 0 | default: |
9209 | 0 | continue; |
9210 | 0 | } |
9211 | | |
9212 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
9213 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
9214 | 0 | r_symndx, ibfd)) |
9215 | 0 | { |
9216 | 0 | free (used); |
9217 | 0 | goto error_ret; |
9218 | 0 | } |
9219 | | |
9220 | 0 | if (sym_sec != toc) |
9221 | 0 | continue; |
9222 | | |
9223 | 0 | if (h != NULL) |
9224 | 0 | val = h->root.u.def.value; |
9225 | 0 | else |
9226 | 0 | val = sym->st_value; |
9227 | 0 | val += rel->r_addend; |
9228 | |
|
9229 | 0 | if (val >= toc->size) |
9230 | 0 | continue; |
9231 | | |
9232 | 0 | if ((skip[val >> 3] & can_optimize) != 0) |
9233 | 0 | { |
9234 | 0 | bfd_vma off; |
9235 | 0 | unsigned char opc; |
9236 | |
|
9237 | 0 | switch (r_type) |
9238 | 0 | { |
9239 | 0 | case R_PPC64_TOC16_HA: |
9240 | 0 | break; |
9241 | | |
9242 | 0 | case R_PPC64_TOC16_LO_DS: |
9243 | 0 | off = rel->r_offset; |
9244 | 0 | off += (bfd_big_endian (ibfd) ? -2 : 3); |
9245 | 0 | if (!bfd_get_section_contents (ibfd, sec, &opc, |
9246 | 0 | off, 1)) |
9247 | 0 | { |
9248 | 0 | free (used); |
9249 | 0 | goto error_ret; |
9250 | 0 | } |
9251 | 0 | if ((opc & (0x3f << 2)) == (58u << 2)) |
9252 | 0 | break; |
9253 | | /* Fall through. */ |
9254 | | |
9255 | 0 | default: |
9256 | | /* Wrong sort of reloc, or not a ld. We may |
9257 | | as well clear ref_from_discarded too. */ |
9258 | 0 | skip[val >> 3] = 0; |
9259 | 0 | } |
9260 | 0 | } |
9261 | | |
9262 | 0 | if (sec != toc) |
9263 | 0 | used[val >> 3] = 1; |
9264 | | /* For the toc section, we only mark as used if this |
9265 | | entry itself isn't unused. */ |
9266 | 0 | else if ((used[rel->r_offset >> 3] |
9267 | 0 | || !(skip[rel->r_offset >> 3] & ref_from_discarded)) |
9268 | 0 | && !used[val >> 3]) |
9269 | 0 | { |
9270 | | /* Do all the relocs again, to catch reference |
9271 | | chains. */ |
9272 | 0 | repeat = 1; |
9273 | 0 | used[val >> 3] = 1; |
9274 | 0 | } |
9275 | 0 | } |
9276 | 0 | } |
9277 | 0 | while (repeat); |
9278 | | |
9279 | 0 | if (elf_section_data (sec)->relocs != relstart) |
9280 | 0 | free (relstart); |
9281 | 0 | } |
9282 | | |
9283 | | /* Merge the used and skip arrays. Assume that TOC |
9284 | | doublewords not appearing as either used or unused belong |
9285 | | to an entry more than one doubleword in size. */ |
9286 | 0 | for (drop = skip, keep = used, last = 0, some_unused = 0; |
9287 | 0 | drop < skip + (toc->size + 7) / 8; |
9288 | 0 | ++drop, ++keep) |
9289 | 0 | { |
9290 | 0 | if (*keep) |
9291 | 0 | { |
9292 | 0 | *drop &= ~ref_from_discarded; |
9293 | 0 | if ((*drop & can_optimize) != 0) |
9294 | 0 | some_unused = 1; |
9295 | 0 | last = 0; |
9296 | 0 | } |
9297 | 0 | else if ((*drop & ref_from_discarded) != 0) |
9298 | 0 | { |
9299 | 0 | some_unused = 1; |
9300 | 0 | last = ref_from_discarded; |
9301 | 0 | } |
9302 | 0 | else |
9303 | 0 | *drop = last; |
9304 | 0 | } |
9305 | |
|
9306 | 0 | free (used); |
9307 | |
|
9308 | 0 | if (some_unused) |
9309 | 0 | { |
9310 | 0 | bfd_byte *contents, *src; |
9311 | 0 | unsigned long off; |
9312 | 0 | Elf_Internal_Sym *sym; |
9313 | 0 | bool local_toc_syms = false; |
9314 | | |
9315 | | /* Shuffle the toc contents, and at the same time convert the |
9316 | | skip array from booleans into offsets. */ |
9317 | 0 | if (!bfd_malloc_and_get_section (ibfd, toc, &contents)) |
9318 | 0 | goto error_ret; |
9319 | | |
9320 | 0 | elf_section_data (toc)->this_hdr.contents = contents; |
9321 | |
|
9322 | 0 | for (src = contents, off = 0, drop = skip; |
9323 | 0 | src < contents + toc->size; |
9324 | 0 | src += 8, ++drop) |
9325 | 0 | { |
9326 | 0 | if ((*drop & (can_optimize | ref_from_discarded)) != 0) |
9327 | 0 | off += 8; |
9328 | 0 | else if (off != 0) |
9329 | 0 | { |
9330 | 0 | *drop = off; |
9331 | 0 | memcpy (src - off, src, 8); |
9332 | 0 | } |
9333 | 0 | } |
9334 | 0 | *drop = off; |
9335 | 0 | toc->rawsize = toc->size; |
9336 | 0 | toc->size = src - contents - off; |
9337 | | |
9338 | | /* Adjust addends for relocs against the toc section sym, |
9339 | | and optimize any accesses we can. */ |
9340 | 0 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
9341 | 0 | { |
9342 | 0 | if (sec->reloc_count == 0 |
9343 | 0 | || discarded_section (sec)) |
9344 | 0 | continue; |
9345 | | |
9346 | 0 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
9347 | 0 | info->keep_memory); |
9348 | 0 | if (relstart == NULL) |
9349 | 0 | goto error_ret; |
9350 | | |
9351 | 0 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
9352 | 0 | { |
9353 | 0 | enum elf_ppc64_reloc_type r_type; |
9354 | 0 | unsigned long r_symndx; |
9355 | 0 | asection *sym_sec; |
9356 | 0 | struct elf_link_hash_entry *h; |
9357 | 0 | bfd_vma val; |
9358 | |
|
9359 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
9360 | 0 | switch (r_type) |
9361 | 0 | { |
9362 | 0 | default: |
9363 | 0 | continue; |
9364 | | |
9365 | 0 | case R_PPC64_TOC16: |
9366 | 0 | case R_PPC64_TOC16_LO: |
9367 | 0 | case R_PPC64_TOC16_HI: |
9368 | 0 | case R_PPC64_TOC16_HA: |
9369 | 0 | case R_PPC64_TOC16_DS: |
9370 | 0 | case R_PPC64_TOC16_LO_DS: |
9371 | 0 | case R_PPC64_ADDR64: |
9372 | 0 | break; |
9373 | 0 | } |
9374 | | |
9375 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
9376 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
9377 | 0 | r_symndx, ibfd)) |
9378 | 0 | goto error_ret; |
9379 | | |
9380 | 0 | if (sym_sec != toc) |
9381 | 0 | continue; |
9382 | | |
9383 | 0 | if (h != NULL) |
9384 | 0 | val = h->root.u.def.value; |
9385 | 0 | else |
9386 | 0 | { |
9387 | 0 | val = sym->st_value; |
9388 | 0 | if (val != 0) |
9389 | 0 | local_toc_syms = true; |
9390 | 0 | } |
9391 | |
|
9392 | 0 | val += rel->r_addend; |
9393 | |
|
9394 | 0 | if (val > toc->rawsize) |
9395 | 0 | val = toc->rawsize; |
9396 | 0 | else if ((skip[val >> 3] & ref_from_discarded) != 0) |
9397 | 0 | continue; |
9398 | 0 | else if ((skip[val >> 3] & can_optimize) != 0) |
9399 | 0 | { |
9400 | 0 | Elf_Internal_Rela *tocrel |
9401 | 0 | = toc_relocs + (skip[val >> 3] >> 2); |
9402 | 0 | unsigned long tsym = ELF64_R_SYM (tocrel->r_info); |
9403 | |
|
9404 | 0 | switch (r_type) |
9405 | 0 | { |
9406 | 0 | case R_PPC64_TOC16_HA: |
9407 | 0 | rel->r_info = ELF64_R_INFO (tsym, R_PPC64_TOC16_HA); |
9408 | 0 | break; |
9409 | | |
9410 | 0 | case R_PPC64_TOC16_LO_DS: |
9411 | 0 | rel->r_info = ELF64_R_INFO (tsym, R_PPC64_LO_DS_OPT); |
9412 | 0 | break; |
9413 | | |
9414 | 0 | default: |
9415 | 0 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
9416 | 0 | ppc_howto_init (); |
9417 | 0 | info->callbacks->einfo |
9418 | | /* xgettext:c-format */ |
9419 | 0 | (_("%H: %s references " |
9420 | 0 | "optimized away TOC entry\n"), |
9421 | 0 | ibfd, sec, rel->r_offset, |
9422 | 0 | ppc64_elf_howto_table[r_type]->name); |
9423 | 0 | bfd_set_error (bfd_error_bad_value); |
9424 | 0 | goto error_ret; |
9425 | 0 | } |
9426 | 0 | rel->r_addend = tocrel->r_addend; |
9427 | 0 | elf_section_data (sec)->relocs = relstart; |
9428 | 0 | continue; |
9429 | 0 | } |
9430 | | |
9431 | 0 | if (h != NULL || sym->st_value != 0) |
9432 | 0 | continue; |
9433 | | |
9434 | 0 | rel->r_addend -= skip[val >> 3]; |
9435 | 0 | elf_section_data (sec)->relocs = relstart; |
9436 | 0 | } |
9437 | | |
9438 | 0 | if (elf_section_data (sec)->relocs != relstart) |
9439 | 0 | free (relstart); |
9440 | 0 | } |
9441 | | |
9442 | | /* We shouldn't have local or global symbols defined in the TOC, |
9443 | | but handle them anyway. */ |
9444 | 0 | if (local_syms != NULL) |
9445 | 0 | for (sym = local_syms; |
9446 | 0 | sym < local_syms + symtab_hdr->sh_info; |
9447 | 0 | ++sym) |
9448 | 0 | if (sym->st_value != 0 |
9449 | 0 | && bfd_section_from_elf_index (ibfd, sym->st_shndx) == toc) |
9450 | 0 | { |
9451 | 0 | unsigned long i; |
9452 | |
|
9453 | 0 | if (sym->st_value > toc->rawsize) |
9454 | 0 | i = toc->rawsize >> 3; |
9455 | 0 | else |
9456 | 0 | i = sym->st_value >> 3; |
9457 | |
|
9458 | 0 | if ((skip[i] & (ref_from_discarded | can_optimize)) != 0) |
9459 | 0 | { |
9460 | 0 | if (local_toc_syms) |
9461 | 0 | _bfd_error_handler |
9462 | 0 | (_("%s defined on removed toc entry"), |
9463 | 0 | bfd_elf_sym_name (ibfd, symtab_hdr, sym, NULL)); |
9464 | 0 | do |
9465 | 0 | ++i; |
9466 | 0 | while ((skip[i] & (ref_from_discarded | can_optimize))); |
9467 | 0 | sym->st_value = (bfd_vma) i << 3; |
9468 | 0 | } |
9469 | |
|
9470 | 0 | sym->st_value -= skip[i]; |
9471 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
9472 | 0 | } |
9473 | | |
9474 | | /* Adjust any global syms defined in this toc input section. */ |
9475 | 0 | if (toc_inf.global_toc_syms) |
9476 | 0 | { |
9477 | 0 | toc_inf.toc = toc; |
9478 | 0 | toc_inf.skip = skip; |
9479 | 0 | toc_inf.global_toc_syms = false; |
9480 | 0 | elf_link_hash_traverse (elf_hash_table (info), adjust_toc_syms, |
9481 | 0 | &toc_inf); |
9482 | 0 | } |
9483 | |
|
9484 | 0 | if (toc->reloc_count != 0) |
9485 | 0 | { |
9486 | 0 | Elf_Internal_Shdr *rel_hdr; |
9487 | 0 | Elf_Internal_Rela *wrel; |
9488 | 0 | bfd_size_type sz; |
9489 | | |
9490 | | /* Remove unused toc relocs, and adjust those we keep. */ |
9491 | 0 | if (toc_relocs == NULL) |
9492 | 0 | toc_relocs = _bfd_elf_link_read_relocs (ibfd, toc, NULL, NULL, |
9493 | 0 | info->keep_memory); |
9494 | 0 | if (toc_relocs == NULL) |
9495 | 0 | goto error_ret; |
9496 | | |
9497 | 0 | wrel = toc_relocs; |
9498 | 0 | for (rel = toc_relocs; rel < toc_relocs + toc->reloc_count; ++rel) |
9499 | 0 | if ((skip[rel->r_offset >> 3] |
9500 | 0 | & (ref_from_discarded | can_optimize)) == 0) |
9501 | 0 | { |
9502 | 0 | wrel->r_offset = rel->r_offset - skip[rel->r_offset >> 3]; |
9503 | 0 | wrel->r_info = rel->r_info; |
9504 | 0 | wrel->r_addend = rel->r_addend; |
9505 | 0 | ++wrel; |
9506 | 0 | } |
9507 | 0 | else if (!dec_dynrel_count (rel, toc, info, |
9508 | 0 | &local_syms, NULL, NULL)) |
9509 | 0 | goto error_ret; |
9510 | | |
9511 | 0 | elf_section_data (toc)->relocs = toc_relocs; |
9512 | 0 | toc->reloc_count = wrel - toc_relocs; |
9513 | 0 | rel_hdr = _bfd_elf_single_rel_hdr (toc); |
9514 | 0 | sz = rel_hdr->sh_entsize; |
9515 | 0 | rel_hdr->sh_size = toc->reloc_count * sz; |
9516 | 0 | } |
9517 | 0 | } |
9518 | 0 | else if (elf_section_data (toc)->relocs != toc_relocs) |
9519 | 0 | free (toc_relocs); |
9520 | | |
9521 | 0 | if (local_syms != NULL |
9522 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
9523 | 0 | { |
9524 | 0 | if (!info->keep_memory) |
9525 | 0 | free (local_syms); |
9526 | 0 | else |
9527 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
9528 | 0 | } |
9529 | 0 | free (skip); |
9530 | 0 | } |
9531 | | |
9532 | | /* Look for cases where we can change an indirect GOT access to |
9533 | | a GOT relative or PC relative access, possibly reducing the |
9534 | | number of GOT entries. */ |
9535 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
9536 | 0 | { |
9537 | 0 | asection *sec; |
9538 | 0 | Elf_Internal_Shdr *symtab_hdr; |
9539 | 0 | Elf_Internal_Sym *local_syms; |
9540 | 0 | Elf_Internal_Rela *relstart, *rel; |
9541 | 0 | bfd_vma got; |
9542 | |
|
9543 | 0 | if (!is_ppc64_elf (ibfd)) |
9544 | 0 | continue; |
9545 | | |
9546 | 0 | if (!ppc64_elf_tdata (ibfd)->has_optrel) |
9547 | 0 | continue; |
9548 | | |
9549 | 0 | sec = ppc64_elf_tdata (ibfd)->got; |
9550 | 0 | got = 0; |
9551 | 0 | if (sec != NULL) |
9552 | 0 | got = sec->output_section->vma + sec->output_offset + 0x8000; |
9553 | |
|
9554 | 0 | local_syms = NULL; |
9555 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
9556 | |
|
9557 | 0 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
9558 | 0 | { |
9559 | 0 | if (sec->reloc_count == 0 |
9560 | 0 | || !ppc64_elf_section_data (sec)->has_optrel |
9561 | 0 | || discarded_section (sec)) |
9562 | 0 | continue; |
9563 | | |
9564 | 0 | relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL, |
9565 | 0 | info->keep_memory); |
9566 | 0 | if (relstart == NULL) |
9567 | 0 | { |
9568 | 0 | got_error_ret: |
9569 | 0 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
9570 | 0 | free (local_syms); |
9571 | 0 | if (sec != NULL |
9572 | 0 | && elf_section_data (sec)->relocs != relstart) |
9573 | 0 | free (relstart); |
9574 | 0 | return false; |
9575 | 0 | } |
9576 | | |
9577 | 0 | for (rel = relstart; rel < relstart + sec->reloc_count; ++rel) |
9578 | 0 | { |
9579 | 0 | enum elf_ppc64_reloc_type r_type; |
9580 | 0 | unsigned long r_symndx; |
9581 | 0 | Elf_Internal_Sym *sym; |
9582 | 0 | asection *sym_sec; |
9583 | 0 | struct elf_link_hash_entry *h; |
9584 | 0 | struct got_entry *ent; |
9585 | 0 | bfd_vma val, pc; |
9586 | 0 | unsigned char buf[8]; |
9587 | 0 | unsigned int insn; |
9588 | 0 | enum {no_check, check_lo, check_ha} insn_check; |
9589 | |
|
9590 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
9591 | 0 | switch (r_type) |
9592 | 0 | { |
9593 | 0 | default: |
9594 | 0 | insn_check = no_check; |
9595 | 0 | break; |
9596 | | |
9597 | 0 | case R_PPC64_PLT16_HA: |
9598 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
9599 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
9600 | 0 | case R_PPC64_GOT_TPREL16_HA: |
9601 | 0 | case R_PPC64_GOT_DTPREL16_HA: |
9602 | 0 | case R_PPC64_GOT16_HA: |
9603 | 0 | case R_PPC64_TOC16_HA: |
9604 | 0 | insn_check = check_ha; |
9605 | 0 | break; |
9606 | | |
9607 | 0 | case R_PPC64_PLT16_LO: |
9608 | 0 | case R_PPC64_PLT16_LO_DS: |
9609 | 0 | case R_PPC64_GOT_TLSLD16_LO: |
9610 | 0 | case R_PPC64_GOT_TLSGD16_LO: |
9611 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
9612 | 0 | case R_PPC64_GOT_DTPREL16_LO_DS: |
9613 | 0 | case R_PPC64_GOT16_LO: |
9614 | 0 | case R_PPC64_GOT16_LO_DS: |
9615 | 0 | case R_PPC64_TOC16_LO: |
9616 | 0 | case R_PPC64_TOC16_LO_DS: |
9617 | 0 | insn_check = check_lo; |
9618 | 0 | break; |
9619 | 0 | } |
9620 | | |
9621 | 0 | if (insn_check != no_check) |
9622 | 0 | { |
9623 | 0 | bfd_vma off = rel->r_offset & ~3; |
9624 | |
|
9625 | 0 | if (!bfd_get_section_contents (ibfd, sec, buf, off, 4)) |
9626 | 0 | goto got_error_ret; |
9627 | | |
9628 | 0 | insn = bfd_get_32 (ibfd, buf); |
9629 | 0 | if (insn_check == check_lo |
9630 | 0 | ? !ok_lo_toc_insn (insn, r_type) |
9631 | 0 | : ((insn & ((0x3fu << 26) | 0x1f << 16)) |
9632 | 0 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) |
9633 | 0 | { |
9634 | 0 | char str[12]; |
9635 | |
|
9636 | 0 | ppc64_elf_tdata (ibfd)->unexpected_toc_insn = 1; |
9637 | 0 | sprintf (str, "%#08x", insn); |
9638 | 0 | info->callbacks->einfo |
9639 | | /* xgettext:c-format */ |
9640 | 0 | (_("%H: got/toc optimization is not supported for" |
9641 | 0 | " %s instruction\n"), |
9642 | 0 | ibfd, sec, rel->r_offset & ~3, str); |
9643 | 0 | continue; |
9644 | 0 | } |
9645 | 0 | } |
9646 | | |
9647 | 0 | switch (r_type) |
9648 | 0 | { |
9649 | | /* Note that we don't delete GOT entries for |
9650 | | R_PPC64_GOT16_DS since we'd need a lot more |
9651 | | analysis. For starters, the preliminary layout is |
9652 | | before the GOT, PLT, dynamic sections and stubs are |
9653 | | laid out. Then we'd need to allow for changes in |
9654 | | distance between sections caused by alignment. */ |
9655 | 0 | default: |
9656 | 0 | continue; |
9657 | | |
9658 | 0 | case R_PPC64_GOT16_HA: |
9659 | 0 | case R_PPC64_GOT16_LO_DS: |
9660 | 0 | case R_PPC64_GOT_PCREL34: |
9661 | 0 | break; |
9662 | 0 | } |
9663 | | |
9664 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
9665 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
9666 | 0 | r_symndx, ibfd)) |
9667 | 0 | goto got_error_ret; |
9668 | | |
9669 | 0 | if (sym_sec == NULL |
9670 | 0 | || sym_sec->output_section == NULL |
9671 | 0 | || discarded_section (sym_sec)) |
9672 | 0 | continue; |
9673 | | |
9674 | 0 | if ((h ? h->type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC) |
9675 | 0 | continue; |
9676 | | |
9677 | 0 | if (!SYMBOL_REFERENCES_LOCAL (info, h) |
9678 | 0 | || (bfd_link_pic (info) |
9679 | 0 | && sym_sec == bfd_abs_section_ptr)) |
9680 | 0 | continue; |
9681 | | |
9682 | 0 | if (h != NULL) |
9683 | 0 | val = h->root.u.def.value; |
9684 | 0 | else |
9685 | 0 | val = sym->st_value; |
9686 | 0 | val += rel->r_addend; |
9687 | 0 | val += sym_sec->output_section->vma + sym_sec->output_offset; |
9688 | | |
9689 | | /* Fudge factor to allow for the fact that the preliminary layout |
9690 | | isn't exact. Reduce limits by this factor. */ |
9691 | 0 | #define LIMIT_ADJUST(LIMIT) ((LIMIT) - (LIMIT) / 16) |
9692 | |
|
9693 | 0 | switch (r_type) |
9694 | 0 | { |
9695 | 0 | default: |
9696 | 0 | continue; |
9697 | | |
9698 | 0 | case R_PPC64_GOT16_HA: |
9699 | 0 | if (val - got + LIMIT_ADJUST (0x80008000ULL) |
9700 | 0 | >= LIMIT_ADJUST (0x100000000ULL)) |
9701 | 0 | continue; |
9702 | | |
9703 | 0 | if (!bfd_get_section_contents (ibfd, sec, buf, |
9704 | 0 | rel->r_offset & ~3, 4)) |
9705 | 0 | goto got_error_ret; |
9706 | 0 | insn = bfd_get_32 (ibfd, buf); |
9707 | 0 | if (((insn & ((0x3fu << 26) | 0x1f << 16)) |
9708 | 0 | != ((15u << 26) | (2 << 16)) /* addis rt,2,imm */)) |
9709 | 0 | continue; |
9710 | 0 | break; |
9711 | | |
9712 | 0 | case R_PPC64_GOT16_LO_DS: |
9713 | 0 | if (val - got + LIMIT_ADJUST (0x80008000ULL) |
9714 | 0 | >= LIMIT_ADJUST (0x100000000ULL)) |
9715 | 0 | continue; |
9716 | 0 | if (!bfd_get_section_contents (ibfd, sec, buf, |
9717 | 0 | rel->r_offset & ~3, 4)) |
9718 | 0 | goto got_error_ret; |
9719 | 0 | insn = bfd_get_32 (ibfd, buf); |
9720 | 0 | if ((insn & (0x3fu << 26 | 0x3)) != 58u << 26 /* ld */) |
9721 | 0 | continue; |
9722 | 0 | break; |
9723 | | |
9724 | 0 | case R_PPC64_GOT_PCREL34: |
9725 | 0 | pc = rel->r_offset; |
9726 | 0 | pc += sec->output_section->vma + sec->output_offset; |
9727 | 0 | if (val - pc + LIMIT_ADJUST (1ULL << 33) |
9728 | 0 | >= LIMIT_ADJUST (1ULL << 34)) |
9729 | 0 | continue; |
9730 | 0 | if (!bfd_get_section_contents (ibfd, sec, buf, |
9731 | 0 | rel->r_offset & ~3, 8)) |
9732 | 0 | goto got_error_ret; |
9733 | 0 | insn = bfd_get_32 (ibfd, buf); |
9734 | 0 | if ((insn & (-1u << 18)) != ((1u << 26) | (1u << 20))) |
9735 | 0 | continue; |
9736 | 0 | insn = bfd_get_32 (ibfd, buf + 4); |
9737 | 0 | if ((insn & (0x3fu << 26)) != 57u << 26) |
9738 | 0 | continue; |
9739 | 0 | break; |
9740 | 0 | } |
9741 | 0 | #undef LIMIT_ADJUST |
9742 | | |
9743 | 0 | if (h != NULL) |
9744 | 0 | ent = h->got.glist; |
9745 | 0 | else |
9746 | 0 | { |
9747 | 0 | struct got_entry **local_got_ents = elf_local_got_ents (ibfd); |
9748 | 0 | ent = local_got_ents[r_symndx]; |
9749 | 0 | } |
9750 | 0 | for (; ent != NULL; ent = ent->next) |
9751 | 0 | if (ent->addend == rel->r_addend |
9752 | 0 | && ent->owner == ibfd |
9753 | 0 | && ent->tls_type == 0) |
9754 | 0 | break; |
9755 | 0 | BFD_ASSERT (ent && ent->got.refcount > 0); |
9756 | 0 | ent->got.refcount -= 1; |
9757 | 0 | } |
9758 | | |
9759 | 0 | if (elf_section_data (sec)->relocs != relstart) |
9760 | 0 | free (relstart); |
9761 | 0 | } |
9762 | | |
9763 | 0 | if (local_syms != NULL |
9764 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
9765 | 0 | { |
9766 | 0 | if (!info->keep_memory) |
9767 | 0 | free (local_syms); |
9768 | 0 | else |
9769 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
9770 | 0 | } |
9771 | 0 | } |
9772 | | |
9773 | 0 | return true; |
9774 | 0 | } |
9775 | | |
9776 | | /* Return true iff input section I references the TOC using |
9777 | | instructions limited to +/-32k offsets. */ |
9778 | | |
9779 | | bool |
9780 | | ppc64_elf_has_small_toc_reloc (asection *i) |
9781 | 0 | { |
9782 | 0 | return (is_ppc64_elf (i->owner) |
9783 | 0 | && ppc64_elf_tdata (i->owner)->has_small_toc_reloc); |
9784 | 0 | } |
9785 | | |
9786 | | /* Allocate space for one GOT entry. */ |
9787 | | |
9788 | | static void |
9789 | | allocate_got (struct elf_link_hash_entry *h, |
9790 | | struct bfd_link_info *info, |
9791 | | struct got_entry *gent) |
9792 | 0 | { |
9793 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
9794 | 0 | struct ppc_link_hash_entry *eh = ppc_elf_hash_entry (h); |
9795 | 0 | int entsize = (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD) |
9796 | 0 | ? 16 : 8); |
9797 | 0 | int rentsize = (gent->tls_type & eh->tls_mask & TLS_GD |
9798 | 0 | ? 2 : 1) * sizeof (Elf64_External_Rela); |
9799 | 0 | asection *got = ppc64_elf_tdata (gent->owner)->got; |
9800 | |
|
9801 | 0 | gent->got.offset = got->size; |
9802 | 0 | got->size += entsize; |
9803 | |
|
9804 | 0 | if (h->type == STT_GNU_IFUNC) |
9805 | 0 | { |
9806 | 0 | htab->elf.irelplt->size += rentsize; |
9807 | 0 | htab->got_reli_size += rentsize; |
9808 | 0 | } |
9809 | 0 | else if (((bfd_link_pic (info) |
9810 | 0 | && (gent->tls_type == 0 |
9811 | 0 | ? !info->enable_dt_relr |
9812 | 0 | : !(bfd_link_executable (info) |
9813 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h))) |
9814 | 0 | && !bfd_is_abs_symbol (&h->root)) |
9815 | 0 | || (htab->elf.dynamic_sections_created |
9816 | 0 | && h->dynindx != -1 |
9817 | 0 | && !SYMBOL_REFERENCES_LOCAL (info, h))) |
9818 | 0 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
9819 | 0 | { |
9820 | 0 | asection *relgot = ppc64_elf_tdata (gent->owner)->relgot; |
9821 | 0 | relgot->size += rentsize; |
9822 | 0 | } |
9823 | 0 | } |
9824 | | |
9825 | | /* This function merges got entries in the same toc group. */ |
9826 | | |
9827 | | static void |
9828 | | merge_got_entries (struct got_entry **pent) |
9829 | 0 | { |
9830 | 0 | struct got_entry *ent, *ent2; |
9831 | |
|
9832 | 0 | for (ent = *pent; ent != NULL; ent = ent->next) |
9833 | 0 | if (!ent->is_indirect) |
9834 | 0 | for (ent2 = ent->next; ent2 != NULL; ent2 = ent2->next) |
9835 | 0 | if (!ent2->is_indirect |
9836 | 0 | && ent2->addend == ent->addend |
9837 | 0 | && ent2->tls_type == ent->tls_type |
9838 | 0 | && elf_gp (ent2->owner) == elf_gp (ent->owner)) |
9839 | 0 | { |
9840 | 0 | ent2->is_indirect = true; |
9841 | 0 | ent2->got.ent = ent; |
9842 | 0 | } |
9843 | 0 | } |
9844 | | |
9845 | | /* If H is undefined, make it dynamic if that makes sense. */ |
9846 | | |
9847 | | static bool |
9848 | | ensure_undef_dynamic (struct bfd_link_info *info, |
9849 | | struct elf_link_hash_entry *h) |
9850 | 0 | { |
9851 | 0 | struct elf_link_hash_table *htab = elf_hash_table (info); |
9852 | |
|
9853 | 0 | if (htab->dynamic_sections_created |
9854 | 0 | && ((info->dynamic_undefined_weak != 0 |
9855 | 0 | && h->root.type == bfd_link_hash_undefweak) |
9856 | 0 | || h->root.type == bfd_link_hash_undefined) |
9857 | 0 | && h->dynindx == -1 |
9858 | 0 | && !h->forced_local |
9859 | 0 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
9860 | 0 | return bfd_elf_link_record_dynamic_symbol (info, h); |
9861 | 0 | return true; |
9862 | 0 | } |
9863 | | |
9864 | | /* Choose whether to use htab->iplt or htab->pltlocal rather than the |
9865 | | usual htab->elf.splt section for a PLT entry. */ |
9866 | | |
9867 | | static inline |
9868 | | bool use_local_plt (struct bfd_link_info *info, |
9869 | | struct elf_link_hash_entry *h) |
9870 | 0 | { |
9871 | 0 | return (h == NULL |
9872 | 0 | || h->dynindx == -1 |
9873 | 0 | || !elf_hash_table (info)->dynamic_sections_created); |
9874 | 0 | } |
9875 | | |
9876 | | /* Allocate space in .plt, .got and associated reloc sections for |
9877 | | dynamic relocs. */ |
9878 | | |
9879 | | static bool |
9880 | | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
9881 | 0 | { |
9882 | 0 | struct bfd_link_info *info; |
9883 | 0 | struct ppc_link_hash_table *htab; |
9884 | 0 | asection *s; |
9885 | 0 | struct ppc_link_hash_entry *eh; |
9886 | 0 | struct got_entry **pgent, *gent; |
9887 | |
|
9888 | 0 | if (h->root.type == bfd_link_hash_indirect) |
9889 | 0 | return true; |
9890 | | |
9891 | 0 | info = (struct bfd_link_info *) inf; |
9892 | 0 | htab = ppc_hash_table (info); |
9893 | 0 | if (htab == NULL) |
9894 | 0 | return false; |
9895 | | |
9896 | 0 | eh = ppc_elf_hash_entry (h); |
9897 | | /* Run through the TLS GD got entries first if we're changing them |
9898 | | to TPREL. */ |
9899 | 0 | if ((eh->tls_mask & (TLS_TLS | TLS_GDIE)) == (TLS_TLS | TLS_GDIE)) |
9900 | 0 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
9901 | 0 | if (gent->got.refcount > 0 |
9902 | 0 | && (gent->tls_type & TLS_GD) != 0) |
9903 | 0 | { |
9904 | | /* This was a GD entry that has been converted to TPREL. If |
9905 | | there happens to be a TPREL entry we can use that one. */ |
9906 | 0 | struct got_entry *ent; |
9907 | 0 | for (ent = h->got.glist; ent != NULL; ent = ent->next) |
9908 | 0 | if (ent->got.refcount > 0 |
9909 | 0 | && (ent->tls_type & TLS_TPREL) != 0 |
9910 | 0 | && ent->addend == gent->addend |
9911 | 0 | && ent->owner == gent->owner) |
9912 | 0 | { |
9913 | 0 | gent->got.refcount = 0; |
9914 | 0 | break; |
9915 | 0 | } |
9916 | | |
9917 | | /* If not, then we'll be using our own TPREL entry. */ |
9918 | 0 | if (gent->got.refcount != 0) |
9919 | 0 | gent->tls_type = TLS_TLS | TLS_TPREL; |
9920 | 0 | } |
9921 | | |
9922 | | /* Remove any list entry that won't generate a word in the GOT before |
9923 | | we call merge_got_entries. Otherwise we risk merging to empty |
9924 | | entries. */ |
9925 | 0 | pgent = &h->got.glist; |
9926 | 0 | while ((gent = *pgent) != NULL) |
9927 | 0 | if (gent->got.refcount > 0) |
9928 | 0 | { |
9929 | 0 | if ((gent->tls_type & TLS_LD) != 0 |
9930 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
9931 | 0 | { |
9932 | 0 | ppc64_tlsld_got (gent->owner)->got.refcount += 1; |
9933 | 0 | *pgent = gent->next; |
9934 | 0 | } |
9935 | 0 | else |
9936 | 0 | pgent = &gent->next; |
9937 | 0 | } |
9938 | 0 | else |
9939 | 0 | *pgent = gent->next; |
9940 | |
|
9941 | 0 | if (!htab->do_multi_toc) |
9942 | 0 | merge_got_entries (&h->got.glist); |
9943 | |
|
9944 | 0 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
9945 | 0 | if (!gent->is_indirect) |
9946 | 0 | { |
9947 | | /* Ensure we catch all the cases where this symbol should |
9948 | | be made dynamic. */ |
9949 | 0 | if (!ensure_undef_dynamic (info, h)) |
9950 | 0 | return false; |
9951 | | |
9952 | 0 | if (!is_ppc64_elf (gent->owner)) |
9953 | 0 | abort (); |
9954 | | |
9955 | 0 | allocate_got (h, info, gent); |
9956 | 0 | } |
9957 | | |
9958 | | /* If no dynamic sections we can't have dynamic relocs, except for |
9959 | | IFUNCs which are handled even in static executables. */ |
9960 | 0 | if (!htab->elf.dynamic_sections_created |
9961 | 0 | && h->type != STT_GNU_IFUNC) |
9962 | 0 | h->dyn_relocs = NULL; |
9963 | | |
9964 | | /* Discard relocs on undefined symbols that must be local. */ |
9965 | 0 | else if (h->root.type == bfd_link_hash_undefined |
9966 | 0 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
9967 | 0 | h->dyn_relocs = NULL; |
9968 | | |
9969 | | /* Also discard relocs on undefined weak syms with non-default |
9970 | | visibility, or when dynamic_undefined_weak says so. */ |
9971 | 0 | else if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
9972 | 0 | h->dyn_relocs = NULL; |
9973 | |
|
9974 | 0 | if (h->dyn_relocs != NULL) |
9975 | 0 | { |
9976 | 0 | struct ppc_dyn_relocs *p, **pp; |
9977 | | |
9978 | | /* In the shared -Bsymbolic case, discard space allocated for |
9979 | | dynamic pc-relative relocs against symbols which turn out to |
9980 | | be defined in regular objects. For the normal shared case, |
9981 | | discard space for relocs that have become local due to symbol |
9982 | | visibility changes. */ |
9983 | 0 | if (bfd_link_pic (info)) |
9984 | 0 | { |
9985 | | /* Relocs that use pc_count are those that appear on a call |
9986 | | insn, or certain REL relocs (see must_be_dyn_reloc) that |
9987 | | can be generated via assembly. We want calls to |
9988 | | protected symbols to resolve directly to the function |
9989 | | rather than going via the plt. If people want function |
9990 | | pointer comparisons to work as expected then they should |
9991 | | avoid writing weird assembly. */ |
9992 | 0 | if (SYMBOL_CALLS_LOCAL (info, h)) |
9993 | 0 | { |
9994 | 0 | for (pp = (struct ppc_dyn_relocs **) &h->dyn_relocs; |
9995 | 0 | (p = *pp) != NULL; |
9996 | 0 | ) |
9997 | 0 | { |
9998 | 0 | p->count -= p->pc_count; |
9999 | 0 | p->pc_count = 0; |
10000 | 0 | if (p->count == 0) |
10001 | 0 | *pp = p->next; |
10002 | 0 | else |
10003 | 0 | pp = &p->next; |
10004 | 0 | } |
10005 | 0 | } |
10006 | |
|
10007 | 0 | if (h->dyn_relocs != NULL) |
10008 | 0 | { |
10009 | | /* Ensure we catch all the cases where this symbol |
10010 | | should be made dynamic. */ |
10011 | 0 | if (!ensure_undef_dynamic (info, h)) |
10012 | 0 | return false; |
10013 | 0 | } |
10014 | 0 | } |
10015 | | |
10016 | | /* For a fixed position executable, discard space for |
10017 | | relocs against symbols which are not dynamic. */ |
10018 | 0 | else if (h->type != STT_GNU_IFUNC) |
10019 | 0 | { |
10020 | 0 | if ((h->dynamic_adjusted |
10021 | 0 | || (h->ref_regular |
10022 | 0 | && h->root.type == bfd_link_hash_undefweak |
10023 | 0 | && (info->dynamic_undefined_weak > 0 |
10024 | 0 | || !_bfd_elf_readonly_dynrelocs (h)))) |
10025 | 0 | && !h->def_regular |
10026 | 0 | && !ELF_COMMON_DEF_P (h)) |
10027 | 0 | { |
10028 | | /* Ensure we catch all the cases where this symbol |
10029 | | should be made dynamic. */ |
10030 | 0 | if (!ensure_undef_dynamic (info, h)) |
10031 | 0 | return false; |
10032 | | |
10033 | | /* But if that didn't work out, discard dynamic relocs. */ |
10034 | 0 | if (h->dynindx == -1) |
10035 | 0 | h->dyn_relocs = NULL; |
10036 | 0 | } |
10037 | 0 | else |
10038 | 0 | h->dyn_relocs = NULL; |
10039 | 0 | } |
10040 | | |
10041 | | /* Finally, allocate space. */ |
10042 | 0 | for (p = (struct ppc_dyn_relocs *) h->dyn_relocs; p != NULL; p = p->next) |
10043 | 0 | if (!discarded_section (p->sec)) |
10044 | 0 | { |
10045 | 0 | unsigned int count; |
10046 | 0 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
10047 | 0 | if (eh->elf.type == STT_GNU_IFUNC) |
10048 | 0 | sreloc = htab->elf.irelplt; |
10049 | 0 | count = p->count; |
10050 | 0 | if (info->enable_dt_relr |
10051 | 0 | && ((!NO_OPD_RELOCS |
10052 | 0 | && ppc64_elf_section_data (p->sec)->sec_type == sec_opd) |
10053 | 0 | || (eh->elf.type != STT_GNU_IFUNC |
10054 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h)))) |
10055 | 0 | count -= p->rel_count; |
10056 | 0 | sreloc->size += count * sizeof (Elf64_External_Rela); |
10057 | 0 | } |
10058 | 0 | } |
10059 | | |
10060 | | /* We might need a PLT entry when the symbol |
10061 | | a) is dynamic, or |
10062 | | b) is an ifunc, or |
10063 | | c) has plt16 relocs and has been processed by adjust_dynamic_symbol, or |
10064 | | d) has plt16 relocs and we are linking statically. */ |
10065 | 0 | if ((htab->elf.dynamic_sections_created && h->dynindx != -1) |
10066 | 0 | || h->type == STT_GNU_IFUNC |
10067 | 0 | || (h->needs_plt && h->dynamic_adjusted) |
10068 | 0 | || (h->needs_plt |
10069 | 0 | && h->def_regular |
10070 | 0 | && !htab->elf.dynamic_sections_created |
10071 | 0 | && !htab->can_convert_all_inline_plt |
10072 | 0 | && (ppc_elf_hash_entry (h)->tls_mask |
10073 | 0 | & (TLS_TLS | PLT_KEEP)) == PLT_KEEP)) |
10074 | 0 | { |
10075 | 0 | struct plt_entry *pent; |
10076 | 0 | bool doneone = false; |
10077 | 0 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
10078 | 0 | if (pent->plt.refcount > 0) |
10079 | 0 | { |
10080 | 0 | if (!ensure_undef_dynamic (info, h)) |
10081 | 0 | return false; |
10082 | | |
10083 | 0 | if (use_local_plt (info, h)) |
10084 | 0 | { |
10085 | 0 | if (h->type == STT_GNU_IFUNC) |
10086 | 0 | { |
10087 | 0 | s = htab->elf.iplt; |
10088 | 0 | pent->plt.offset = s->size; |
10089 | 0 | s->size += PLT_ENTRY_SIZE (htab); |
10090 | 0 | s = htab->elf.irelplt; |
10091 | 0 | } |
10092 | 0 | else |
10093 | 0 | { |
10094 | 0 | s = htab->pltlocal; |
10095 | 0 | pent->plt.offset = s->size; |
10096 | 0 | s->size += LOCAL_PLT_ENTRY_SIZE (htab); |
10097 | 0 | s = NULL; |
10098 | 0 | if (bfd_link_pic (info) |
10099 | 0 | && !(info->enable_dt_relr && !htab->opd_abi)) |
10100 | 0 | s = htab->relpltlocal; |
10101 | 0 | } |
10102 | 0 | } |
10103 | 0 | else |
10104 | 0 | { |
10105 | | /* If this is the first .plt entry, make room for the special |
10106 | | first entry. */ |
10107 | 0 | s = htab->elf.splt; |
10108 | 0 | if (s->size == 0) |
10109 | 0 | s->size += PLT_INITIAL_ENTRY_SIZE (htab); |
10110 | |
|
10111 | 0 | pent->plt.offset = s->size; |
10112 | | |
10113 | | /* Make room for this entry. */ |
10114 | 0 | s->size += PLT_ENTRY_SIZE (htab); |
10115 | | |
10116 | | /* Make room for the .glink code. */ |
10117 | 0 | s = htab->glink; |
10118 | 0 | if (s->size == 0) |
10119 | 0 | s->size += GLINK_PLTRESOLVE_SIZE (htab); |
10120 | 0 | if (htab->opd_abi) |
10121 | 0 | { |
10122 | | /* We need bigger stubs past index 32767. */ |
10123 | 0 | if (s->size >= GLINK_PLTRESOLVE_SIZE (htab) + 32768*2*4) |
10124 | 0 | s->size += 4; |
10125 | 0 | s->size += 2*4; |
10126 | 0 | } |
10127 | 0 | else |
10128 | 0 | s->size += 4; |
10129 | | |
10130 | | /* We also need to make an entry in the .rela.plt section. */ |
10131 | 0 | s = htab->elf.srelplt; |
10132 | 0 | } |
10133 | 0 | if (s != NULL) |
10134 | 0 | s->size += sizeof (Elf64_External_Rela); |
10135 | 0 | doneone = true; |
10136 | 0 | } |
10137 | 0 | else |
10138 | 0 | pent->plt.offset = (bfd_vma) -1; |
10139 | 0 | if (!doneone) |
10140 | 0 | { |
10141 | 0 | h->plt.plist = NULL; |
10142 | 0 | h->needs_plt = 0; |
10143 | 0 | } |
10144 | 0 | } |
10145 | 0 | else |
10146 | 0 | { |
10147 | 0 | h->plt.plist = NULL; |
10148 | 0 | h->needs_plt = 0; |
10149 | 0 | } |
10150 | | |
10151 | 0 | return true; |
10152 | 0 | } |
10153 | | |
10154 | 0 | #define PPC_LO(v) ((v) & 0xffff) |
10155 | 0 | #define PPC_HI(v) (((v) >> 16) & 0xffff) |
10156 | 0 | #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
10157 | | #define D34(v) \ |
10158 | 0 | ((((v) & 0x3ffff0000ULL) << 16) | (v & 0xffff)) |
10159 | | #define HA34(v) ((v + (1ULL << 33)) >> 34) |
10160 | | |
10161 | | /* Called via elf_link_hash_traverse from ppc64_elf_late_size_sections |
10162 | | to set up space for global entry stubs. These are put in glink, |
10163 | | after the branch table. */ |
10164 | | |
10165 | | static bool |
10166 | | size_global_entry_stubs (struct elf_link_hash_entry *h, void *inf) |
10167 | 0 | { |
10168 | 0 | struct bfd_link_info *info; |
10169 | 0 | struct ppc_link_hash_table *htab; |
10170 | 0 | struct plt_entry *pent; |
10171 | 0 | asection *s, *plt; |
10172 | |
|
10173 | 0 | if (h->root.type == bfd_link_hash_indirect) |
10174 | 0 | return true; |
10175 | | |
10176 | 0 | if (!h->pointer_equality_needed) |
10177 | 0 | return true; |
10178 | | |
10179 | 0 | if (h->def_regular) |
10180 | 0 | return true; |
10181 | | |
10182 | 0 | info = inf; |
10183 | 0 | htab = ppc_hash_table (info); |
10184 | 0 | if (htab == NULL) |
10185 | 0 | return false; |
10186 | | |
10187 | 0 | s = htab->global_entry; |
10188 | 0 | plt = htab->elf.splt; |
10189 | 0 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
10190 | 0 | if (pent->plt.offset != (bfd_vma) -1 |
10191 | 0 | && pent->addend == 0) |
10192 | 0 | { |
10193 | | /* For ELFv2, if this symbol is not defined in a regular file |
10194 | | and we are not generating a shared library or pie, then we |
10195 | | need to define the symbol in the executable on a call stub. |
10196 | | This is to avoid text relocations. */ |
10197 | 0 | bfd_vma off, stub_align, stub_off, stub_size; |
10198 | 0 | unsigned int align_power; |
10199 | |
|
10200 | 0 | stub_size = 16; |
10201 | 0 | stub_off = s->size; |
10202 | 0 | if (htab->params->plt_stub_align >= 0) |
10203 | 0 | align_power = htab->params->plt_stub_align; |
10204 | 0 | else |
10205 | 0 | align_power = -htab->params->plt_stub_align; |
10206 | | /* Setting section alignment is delayed until we know it is |
10207 | | non-empty. Otherwise the .text output section will be |
10208 | | aligned at least to plt_stub_align even when no global |
10209 | | entry stubs are needed. */ |
10210 | 0 | if (!bfd_link_align_section (s, align_power)) |
10211 | 0 | return false; |
10212 | 0 | stub_align = (bfd_vma) 1 << align_power; |
10213 | 0 | if (htab->params->plt_stub_align >= 0 |
10214 | 0 | || ((((stub_off + stub_size - 1) & -stub_align) |
10215 | 0 | - (stub_off & -stub_align)) |
10216 | 0 | > ((stub_size - 1) & -stub_align))) |
10217 | 0 | stub_off = (stub_off + stub_align - 1) & -stub_align; |
10218 | 0 | off = pent->plt.offset + plt->output_offset + plt->output_section->vma; |
10219 | 0 | off -= stub_off + s->output_offset + s->output_section->vma; |
10220 | | /* Note that for --plt-stub-align negative we have a possible |
10221 | | dependency between stub offset and size. Break that |
10222 | | dependency by assuming the max stub size when calculating |
10223 | | the stub offset. */ |
10224 | 0 | if (PPC_HA (off) == 0) |
10225 | 0 | stub_size -= 4; |
10226 | 0 | h->root.type = bfd_link_hash_defined; |
10227 | 0 | h->root.u.def.section = s; |
10228 | 0 | h->root.u.def.value = stub_off; |
10229 | 0 | s->size = stub_off + stub_size; |
10230 | 0 | break; |
10231 | 0 | } |
10232 | 0 | return true; |
10233 | 0 | } |
10234 | | |
10235 | | /* Set the sizes of the dynamic sections. */ |
10236 | | |
10237 | | static bool |
10238 | | ppc64_elf_late_size_sections (bfd *output_bfd, |
10239 | | struct bfd_link_info *info) |
10240 | 0 | { |
10241 | 0 | struct ppc_link_hash_table *htab; |
10242 | 0 | bfd *dynobj; |
10243 | 0 | asection *s; |
10244 | 0 | bool relocs; |
10245 | 0 | bfd *ibfd; |
10246 | 0 | struct got_entry *first_tlsld; |
10247 | |
|
10248 | 0 | htab = ppc_hash_table (info); |
10249 | 0 | if (htab == NULL) |
10250 | 0 | return false; |
10251 | | |
10252 | 0 | dynobj = htab->elf.dynobj; |
10253 | 0 | if (dynobj == NULL) |
10254 | 0 | return true; |
10255 | | |
10256 | 0 | if (htab->elf.dynamic_sections_created) |
10257 | 0 | { |
10258 | | /* Set the contents of the .interp section to the interpreter. */ |
10259 | 0 | if (bfd_link_executable (info) && !info->nointerp) |
10260 | 0 | { |
10261 | 0 | s = bfd_get_linker_section (dynobj, ".interp"); |
10262 | 0 | if (s == NULL) |
10263 | 0 | abort (); |
10264 | 0 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
10265 | 0 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
10266 | 0 | s->alloced = 1; |
10267 | 0 | } |
10268 | 0 | } |
10269 | | |
10270 | | /* Set up .got offsets for local syms, and space for local dynamic |
10271 | | relocs. */ |
10272 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
10273 | 0 | { |
10274 | 0 | struct got_entry **lgot_ents; |
10275 | 0 | struct got_entry **end_lgot_ents; |
10276 | 0 | struct plt_entry **local_plt; |
10277 | 0 | struct plt_entry **end_local_plt; |
10278 | 0 | unsigned char *lgot_masks; |
10279 | 0 | bfd_size_type locsymcount; |
10280 | 0 | Elf_Internal_Shdr *symtab_hdr; |
10281 | 0 | Elf_Internal_Sym *local_syms; |
10282 | 0 | Elf_Internal_Sym *isym; |
10283 | |
|
10284 | 0 | if (!is_ppc64_elf (ibfd)) |
10285 | 0 | continue; |
10286 | | |
10287 | 0 | for (s = ibfd->sections; s != NULL; s = s->next) |
10288 | 0 | { |
10289 | 0 | struct ppc_local_dyn_relocs *p; |
10290 | |
|
10291 | 0 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
10292 | 0 | { |
10293 | 0 | if (discarded_section (p->sec)) |
10294 | 0 | { |
10295 | | /* Input section has been discarded, either because |
10296 | | it is a copy of a linkonce section or due to |
10297 | | linker script /DISCARD/, so we'll be discarding |
10298 | | the relocs too. */ |
10299 | 0 | } |
10300 | 0 | else if (p->count != 0) |
10301 | 0 | { |
10302 | 0 | unsigned int count; |
10303 | 0 | asection *srel; |
10304 | |
|
10305 | 0 | count = p->count; |
10306 | 0 | if (info->enable_dt_relr |
10307 | 0 | && ((!NO_OPD_RELOCS |
10308 | 0 | && (ppc64_elf_section_data (p->sec)->sec_type |
10309 | 0 | == sec_opd)) |
10310 | 0 | || !p->ifunc)) |
10311 | 0 | count -= p->rel_count; |
10312 | 0 | srel = elf_section_data (p->sec)->sreloc; |
10313 | 0 | if (p->ifunc) |
10314 | 0 | srel = htab->elf.irelplt; |
10315 | 0 | srel->size += count * sizeof (Elf64_External_Rela); |
10316 | 0 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
10317 | 0 | info->flags |= DF_TEXTREL; |
10318 | 0 | } |
10319 | 0 | } |
10320 | 0 | } |
10321 | |
|
10322 | 0 | lgot_ents = elf_local_got_ents (ibfd); |
10323 | 0 | if (!lgot_ents) |
10324 | 0 | continue; |
10325 | | |
10326 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
10327 | 0 | locsymcount = symtab_hdr->sh_info; |
10328 | 0 | end_lgot_ents = lgot_ents + locsymcount; |
10329 | 0 | local_plt = (struct plt_entry **) end_lgot_ents; |
10330 | 0 | end_local_plt = local_plt + locsymcount; |
10331 | 0 | lgot_masks = (unsigned char *) end_local_plt; |
10332 | 0 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
10333 | 0 | if (local_syms == NULL && locsymcount != 0) |
10334 | 0 | { |
10335 | 0 | local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, locsymcount, |
10336 | 0 | 0, NULL, NULL, NULL); |
10337 | 0 | if (local_syms == NULL) |
10338 | 0 | return false; |
10339 | 0 | } |
10340 | 0 | s = ppc64_elf_tdata (ibfd)->got; |
10341 | 0 | for (isym = local_syms; |
10342 | 0 | lgot_ents < end_lgot_ents; |
10343 | 0 | ++lgot_ents, ++lgot_masks, isym++) |
10344 | 0 | { |
10345 | 0 | struct got_entry **pent, *ent; |
10346 | |
|
10347 | 0 | pent = lgot_ents; |
10348 | 0 | while ((ent = *pent) != NULL) |
10349 | 0 | if (ent->got.refcount > 0) |
10350 | 0 | { |
10351 | 0 | if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) |
10352 | 0 | { |
10353 | 0 | ppc64_tlsld_got (ibfd)->got.refcount += 1; |
10354 | 0 | *pent = ent->next; |
10355 | 0 | } |
10356 | 0 | else |
10357 | 0 | { |
10358 | 0 | unsigned int ent_size = 8; |
10359 | 0 | unsigned int rel_size = sizeof (Elf64_External_Rela); |
10360 | |
|
10361 | 0 | ent->got.offset = s->size; |
10362 | 0 | if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) |
10363 | 0 | { |
10364 | 0 | ent_size *= 2; |
10365 | 0 | rel_size *= 2; |
10366 | 0 | } |
10367 | 0 | s->size += ent_size; |
10368 | 0 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
10369 | 0 | { |
10370 | 0 | htab->elf.irelplt->size += rel_size; |
10371 | 0 | htab->got_reli_size += rel_size; |
10372 | 0 | } |
10373 | 0 | else if (bfd_link_pic (info) |
10374 | 0 | && (ent->tls_type == 0 |
10375 | 0 | ? !info->enable_dt_relr |
10376 | 0 | : !bfd_link_executable (info)) |
10377 | 0 | && isym->st_shndx != SHN_ABS) |
10378 | 0 | { |
10379 | 0 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
10380 | 0 | srel->size += rel_size; |
10381 | 0 | } |
10382 | 0 | pent = &ent->next; |
10383 | 0 | } |
10384 | 0 | } |
10385 | 0 | else |
10386 | 0 | *pent = ent->next; |
10387 | 0 | } |
10388 | 0 | if (local_syms != NULL |
10389 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
10390 | 0 | { |
10391 | 0 | if (!info->keep_memory) |
10392 | 0 | free (local_syms); |
10393 | 0 | else |
10394 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
10395 | 0 | } |
10396 | | |
10397 | | /* Allocate space for plt calls to local syms. */ |
10398 | 0 | lgot_masks = (unsigned char *) end_local_plt; |
10399 | 0 | for (; local_plt < end_local_plt; ++local_plt, ++lgot_masks) |
10400 | 0 | { |
10401 | 0 | struct plt_entry *ent; |
10402 | |
|
10403 | 0 | for (ent = *local_plt; ent != NULL; ent = ent->next) |
10404 | 0 | if (ent->plt.refcount > 0) |
10405 | 0 | { |
10406 | 0 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
10407 | 0 | { |
10408 | 0 | s = htab->elf.iplt; |
10409 | 0 | ent->plt.offset = s->size; |
10410 | 0 | s->size += PLT_ENTRY_SIZE (htab); |
10411 | 0 | htab->elf.irelplt->size += sizeof (Elf64_External_Rela); |
10412 | 0 | } |
10413 | 0 | else if (htab->can_convert_all_inline_plt |
10414 | 0 | || (*lgot_masks & (TLS_TLS | PLT_KEEP)) != PLT_KEEP) |
10415 | 0 | ent->plt.offset = (bfd_vma) -1; |
10416 | 0 | else |
10417 | 0 | { |
10418 | 0 | s = htab->pltlocal; |
10419 | 0 | ent->plt.offset = s->size; |
10420 | 0 | s->size += LOCAL_PLT_ENTRY_SIZE (htab); |
10421 | 0 | if (bfd_link_pic (info) |
10422 | 0 | && !(info->enable_dt_relr && !htab->opd_abi)) |
10423 | 0 | htab->relpltlocal->size += sizeof (Elf64_External_Rela); |
10424 | 0 | } |
10425 | 0 | } |
10426 | 0 | else |
10427 | 0 | ent->plt.offset = (bfd_vma) -1; |
10428 | 0 | } |
10429 | 0 | } |
10430 | | |
10431 | | /* Allocate global sym .plt and .got entries, and space for global |
10432 | | sym dynamic relocs. */ |
10433 | 0 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
10434 | |
|
10435 | 0 | if (!htab->opd_abi && !bfd_link_pic (info)) |
10436 | 0 | elf_link_hash_traverse (&htab->elf, size_global_entry_stubs, info); |
10437 | |
|
10438 | 0 | first_tlsld = NULL; |
10439 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
10440 | 0 | { |
10441 | 0 | struct got_entry *ent; |
10442 | |
|
10443 | 0 | if (!is_ppc64_elf (ibfd)) |
10444 | 0 | continue; |
10445 | | |
10446 | 0 | ent = ppc64_tlsld_got (ibfd); |
10447 | 0 | if (ent->got.refcount > 0) |
10448 | 0 | { |
10449 | 0 | if (!htab->do_multi_toc && first_tlsld != NULL) |
10450 | 0 | { |
10451 | 0 | ent->is_indirect = true; |
10452 | 0 | ent->got.ent = first_tlsld; |
10453 | 0 | } |
10454 | 0 | else |
10455 | 0 | { |
10456 | 0 | if (first_tlsld == NULL) |
10457 | 0 | first_tlsld = ent; |
10458 | 0 | s = ppc64_elf_tdata (ibfd)->got; |
10459 | 0 | ent->got.offset = s->size; |
10460 | 0 | ent->owner = ibfd; |
10461 | 0 | s->size += 16; |
10462 | 0 | if (bfd_link_dll (info)) |
10463 | 0 | { |
10464 | 0 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
10465 | 0 | srel->size += sizeof (Elf64_External_Rela); |
10466 | 0 | } |
10467 | 0 | } |
10468 | 0 | } |
10469 | 0 | else |
10470 | 0 | ent->got.offset = (bfd_vma) -1; |
10471 | 0 | } |
10472 | | |
10473 | | /* We now have determined the sizes of the various dynamic sections. |
10474 | | Allocate memory for them. */ |
10475 | 0 | relocs = false; |
10476 | 0 | for (s = dynobj->sections; s != NULL; s = s->next) |
10477 | 0 | { |
10478 | 0 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
10479 | 0 | continue; |
10480 | | |
10481 | 0 | if (s == htab->brlt || s == htab->relbrlt || s == htab->elf.srelrdyn) |
10482 | | /* These haven't been allocated yet; don't strip. */ |
10483 | 0 | continue; |
10484 | 0 | else if (s == htab->elf.sgot |
10485 | 0 | || s == htab->elf.splt |
10486 | 0 | || s == htab->elf.iplt |
10487 | 0 | || s == htab->pltlocal |
10488 | 0 | || s == htab->glink |
10489 | 0 | || s == htab->global_entry |
10490 | 0 | || s == htab->elf.sdynbss |
10491 | 0 | || s == htab->elf.sdynrelro) |
10492 | 0 | { |
10493 | | /* Strip this section if we don't need it; see the |
10494 | | comment below. */ |
10495 | 0 | } |
10496 | 0 | else if (s == htab->glink_eh_frame) |
10497 | 0 | { |
10498 | 0 | if (!bfd_is_abs_section (s->output_section)) |
10499 | | /* Not sized yet. */ |
10500 | 0 | continue; |
10501 | 0 | } |
10502 | 0 | else if (startswith (s->name, ".rela")) |
10503 | 0 | { |
10504 | 0 | if (s->size != 0) |
10505 | 0 | { |
10506 | 0 | if (s != htab->elf.srelplt) |
10507 | 0 | relocs = true; |
10508 | | |
10509 | | /* We use the reloc_count field as a counter if we need |
10510 | | to copy relocs into the output file. */ |
10511 | 0 | s->reloc_count = 0; |
10512 | 0 | } |
10513 | 0 | } |
10514 | 0 | else |
10515 | 0 | { |
10516 | | /* It's not one of our sections, so don't allocate space. */ |
10517 | 0 | continue; |
10518 | 0 | } |
10519 | | |
10520 | 0 | if (s->size == 0) |
10521 | 0 | { |
10522 | | /* If we don't need this section, strip it from the |
10523 | | output file. This is mostly to handle .rela.bss and |
10524 | | .rela.plt. We must create both sections in |
10525 | | create_dynamic_sections, because they must be created |
10526 | | before the linker maps input sections to output |
10527 | | sections. The linker does that before |
10528 | | adjust_dynamic_symbol is called, and it is that |
10529 | | function which decides whether anything needs to go |
10530 | | into these sections. */ |
10531 | 0 | s->flags |= SEC_EXCLUDE; |
10532 | 0 | continue; |
10533 | 0 | } |
10534 | | |
10535 | 0 | if (bfd_is_abs_section (s->output_section)) |
10536 | 0 | _bfd_error_handler (_("warning: discarding dynamic section %s"), |
10537 | 0 | s->name); |
10538 | |
|
10539 | 0 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
10540 | 0 | continue; |
10541 | | |
10542 | | /* Allocate memory for the section contents. We use bfd_zalloc |
10543 | | here in case unused entries are not reclaimed before the |
10544 | | section's contents are written out. This should not happen, |
10545 | | but this way if it does we get a R_PPC64_NONE reloc in .rela |
10546 | | sections instead of garbage. |
10547 | | We also rely on the section contents being zero when writing |
10548 | | the GOT and .dynrelro. */ |
10549 | 0 | s->contents = bfd_zalloc (dynobj, s->size); |
10550 | 0 | if (s->contents == NULL) |
10551 | 0 | return false; |
10552 | 0 | s->alloced = 1; |
10553 | 0 | } |
10554 | | |
10555 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
10556 | 0 | { |
10557 | 0 | if (!is_ppc64_elf (ibfd)) |
10558 | 0 | continue; |
10559 | | |
10560 | 0 | s = ppc64_elf_tdata (ibfd)->got; |
10561 | 0 | if (s != NULL && s != htab->elf.sgot) |
10562 | 0 | { |
10563 | 0 | if (s->size == 0) |
10564 | 0 | s->flags |= SEC_EXCLUDE; |
10565 | 0 | else |
10566 | 0 | { |
10567 | 0 | s->contents = bfd_zalloc (ibfd, s->size); |
10568 | 0 | if (s->contents == NULL) |
10569 | 0 | return false; |
10570 | 0 | s->alloced = 1; |
10571 | 0 | } |
10572 | 0 | } |
10573 | 0 | s = ppc64_elf_tdata (ibfd)->relgot; |
10574 | 0 | if (s != NULL) |
10575 | 0 | { |
10576 | 0 | if (s->size == 0) |
10577 | 0 | s->flags |= SEC_EXCLUDE; |
10578 | 0 | else |
10579 | 0 | { |
10580 | 0 | s->contents = bfd_zalloc (ibfd, s->size); |
10581 | 0 | if (s->contents == NULL) |
10582 | 0 | return false; |
10583 | 0 | s->alloced = 1; |
10584 | 0 | relocs = true; |
10585 | 0 | s->reloc_count = 0; |
10586 | 0 | } |
10587 | 0 | } |
10588 | 0 | } |
10589 | | |
10590 | 0 | if (htab->elf.dynamic_sections_created) |
10591 | 0 | { |
10592 | 0 | bool tls_opt; |
10593 | | |
10594 | | /* Add some entries to the .dynamic section. We fill in the |
10595 | | values later, in ppc64_elf_finish_dynamic_sections, but we |
10596 | | must add the entries now so that we get the correct size for |
10597 | | the .dynamic section. The DT_DEBUG entry is filled in by the |
10598 | | dynamic linker and used by the debugger. */ |
10599 | 0 | #define add_dynamic_entry(TAG, VAL) \ |
10600 | 0 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
10601 | |
|
10602 | 0 | if (bfd_link_executable (info)) |
10603 | 0 | { |
10604 | 0 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
10605 | 0 | return false; |
10606 | 0 | } |
10607 | | |
10608 | 0 | if (htab->elf.splt != NULL && htab->elf.splt->size != 0) |
10609 | 0 | { |
10610 | 0 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
10611 | 0 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
10612 | 0 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
10613 | 0 | || !add_dynamic_entry (DT_JMPREL, 0) |
10614 | 0 | || !add_dynamic_entry (DT_PPC64_GLINK, 0)) |
10615 | 0 | return false; |
10616 | 0 | } |
10617 | | |
10618 | 0 | if (NO_OPD_RELOCS && abiversion (output_bfd) <= 1) |
10619 | 0 | { |
10620 | 0 | if (!add_dynamic_entry (DT_PPC64_OPD, 0) |
10621 | 0 | || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) |
10622 | 0 | return false; |
10623 | 0 | } |
10624 | | |
10625 | 0 | tls_opt = (htab->params->tls_get_addr_opt |
10626 | 0 | && ((htab->tls_get_addr_fd != NULL |
10627 | 0 | && htab->tls_get_addr_fd->elf.plt.plist != NULL) |
10628 | 0 | || (htab->tga_desc_fd != NULL |
10629 | 0 | && htab->tga_desc_fd->elf.plt.plist != NULL))); |
10630 | 0 | if (tls_opt || !htab->opd_abi) |
10631 | 0 | { |
10632 | 0 | if (!add_dynamic_entry (DT_PPC64_OPT, tls_opt ? PPC64_OPT_TLS : 0)) |
10633 | 0 | return false; |
10634 | 0 | } |
10635 | | |
10636 | 0 | if (relocs) |
10637 | 0 | { |
10638 | 0 | if (!add_dynamic_entry (DT_RELA, 0) |
10639 | 0 | || !add_dynamic_entry (DT_RELASZ, 0) |
10640 | 0 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
10641 | 0 | return false; |
10642 | | |
10643 | | /* If any dynamic relocs apply to a read-only section, |
10644 | | then we need a DT_TEXTREL entry. */ |
10645 | 0 | if ((info->flags & DF_TEXTREL) == 0) |
10646 | 0 | elf_link_hash_traverse (&htab->elf, |
10647 | 0 | _bfd_elf_maybe_set_textrel, info); |
10648 | |
|
10649 | 0 | if ((info->flags & DF_TEXTREL) != 0) |
10650 | 0 | { |
10651 | 0 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
10652 | 0 | return false; |
10653 | 0 | } |
10654 | 0 | } |
10655 | 0 | } |
10656 | 0 | #undef add_dynamic_entry |
10657 | | |
10658 | 0 | return true; |
10659 | 0 | } |
10660 | | |
10661 | | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
10662 | | |
10663 | | static bool |
10664 | | ppc64_elf_hash_symbol (struct elf_link_hash_entry *h) |
10665 | 0 | { |
10666 | 0 | if (h->plt.plist != NULL |
10667 | 0 | && !h->def_regular |
10668 | 0 | && !h->pointer_equality_needed) |
10669 | 0 | return false; |
10670 | | |
10671 | 0 | return _bfd_elf_hash_symbol (h); |
10672 | 0 | } |
10673 | | |
10674 | | /* Determine the type of stub needed, if any, for a call. */ |
10675 | | |
10676 | | static inline enum ppc_stub_main_type |
10677 | | ppc_type_of_stub (asection *input_sec, |
10678 | | const Elf_Internal_Rela *rel, |
10679 | | struct ppc_link_hash_entry **hash, |
10680 | | struct plt_entry **plt_ent, |
10681 | | bfd_vma destination, |
10682 | | unsigned long local_off) |
10683 | 0 | { |
10684 | 0 | struct ppc_link_hash_entry *h = *hash; |
10685 | 0 | bfd_vma location; |
10686 | 0 | bfd_vma branch_offset; |
10687 | 0 | bfd_vma max_branch_offset; |
10688 | 0 | enum elf_ppc64_reloc_type r_type; |
10689 | |
|
10690 | 0 | if (h != NULL) |
10691 | 0 | { |
10692 | 0 | struct plt_entry *ent; |
10693 | 0 | struct ppc_link_hash_entry *fdh = h; |
10694 | 0 | if (h->oh != NULL |
10695 | 0 | && h->oh->is_func_descriptor) |
10696 | 0 | { |
10697 | 0 | fdh = ppc_follow_link (h->oh); |
10698 | 0 | *hash = fdh; |
10699 | 0 | } |
10700 | |
|
10701 | 0 | for (ent = fdh->elf.plt.plist; ent != NULL; ent = ent->next) |
10702 | 0 | if (ent->addend == rel->r_addend |
10703 | 0 | && ent->plt.offset != (bfd_vma) -1) |
10704 | 0 | { |
10705 | 0 | *plt_ent = ent; |
10706 | 0 | return ppc_stub_plt_call; |
10707 | 0 | } |
10708 | | |
10709 | | /* Here, we know we don't have a plt entry. If we don't have a |
10710 | | either a defined function descriptor or a defined entry symbol |
10711 | | in a regular object file, then it is pointless trying to make |
10712 | | any other type of stub. */ |
10713 | 0 | if (!is_static_defined (&fdh->elf) |
10714 | 0 | && !is_static_defined (&h->elf)) |
10715 | 0 | return ppc_stub_none; |
10716 | 0 | } |
10717 | 0 | else if (elf_local_got_ents (input_sec->owner) != NULL) |
10718 | 0 | { |
10719 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_sec->owner); |
10720 | 0 | struct plt_entry **local_plt = (struct plt_entry **) |
10721 | 0 | elf_local_got_ents (input_sec->owner) + symtab_hdr->sh_info; |
10722 | 0 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
10723 | |
|
10724 | 0 | if (local_plt[r_symndx] != NULL) |
10725 | 0 | { |
10726 | 0 | struct plt_entry *ent; |
10727 | |
|
10728 | 0 | for (ent = local_plt[r_symndx]; ent != NULL; ent = ent->next) |
10729 | 0 | if (ent->addend == rel->r_addend |
10730 | 0 | && ent->plt.offset != (bfd_vma) -1) |
10731 | 0 | { |
10732 | 0 | *plt_ent = ent; |
10733 | 0 | return ppc_stub_plt_call; |
10734 | 0 | } |
10735 | 0 | } |
10736 | 0 | } |
10737 | | |
10738 | | /* Determine where the call point is. */ |
10739 | 0 | location = (input_sec->output_offset |
10740 | 0 | + input_sec->output_section->vma |
10741 | 0 | + rel->r_offset); |
10742 | |
|
10743 | 0 | branch_offset = destination - location; |
10744 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
10745 | | |
10746 | | /* Determine if a long branch stub is needed. */ |
10747 | 0 | max_branch_offset = 1 << 25; |
10748 | 0 | if (r_type == R_PPC64_REL14 |
10749 | 0 | || r_type == R_PPC64_REL14_BRTAKEN |
10750 | 0 | || r_type == R_PPC64_REL14_BRNTAKEN) |
10751 | 0 | max_branch_offset = 1 << 15; |
10752 | |
|
10753 | 0 | if (branch_offset + max_branch_offset >= 2 * max_branch_offset - local_off) |
10754 | | /* We need a stub. Figure out whether a long_branch or plt_branch |
10755 | | is needed later. */ |
10756 | 0 | return ppc_stub_long_branch; |
10757 | | |
10758 | 0 | return ppc_stub_none; |
10759 | 0 | } |
10760 | | |
10761 | | /* Gets the address of a label (1:) in r11 and builds an offset in r12, |
10762 | | then adds it to r11 (LOAD false) or loads r12 from r11+r12 (LOAD true). |
10763 | | . mflr %r12 |
10764 | | . bcl 20,31,1f |
10765 | | .1: mflr %r11 |
10766 | | . mtlr %r12 |
10767 | | . lis %r12,xxx-1b@highest |
10768 | | . ori %r12,%r12,xxx-1b@higher |
10769 | | . sldi %r12,%r12,32 |
10770 | | . oris %r12,%r12,xxx-1b@high |
10771 | | . ori %r12,%r12,xxx-1b@l |
10772 | | . add/ldx %r12,%r11,%r12 */ |
10773 | | |
10774 | | static bfd_byte * |
10775 | | build_offset (bfd *abfd, bfd_byte *p, bfd_vma off, bool load) |
10776 | 0 | { |
10777 | 0 | bfd_put_32 (abfd, MFLR_R12, p); |
10778 | 0 | p += 4; |
10779 | 0 | bfd_put_32 (abfd, BCL_20_31, p); |
10780 | 0 | p += 4; |
10781 | 0 | bfd_put_32 (abfd, MFLR_R11, p); |
10782 | 0 | p += 4; |
10783 | 0 | bfd_put_32 (abfd, MTLR_R12, p); |
10784 | 0 | p += 4; |
10785 | 0 | if (off + 0x8000 < 0x10000) |
10786 | 0 | { |
10787 | 0 | if (load) |
10788 | 0 | bfd_put_32 (abfd, LD_R12_0R11 + PPC_LO (off), p); |
10789 | 0 | else |
10790 | 0 | bfd_put_32 (abfd, ADDI_R12_R11 + PPC_LO (off), p); |
10791 | 0 | p += 4; |
10792 | 0 | } |
10793 | 0 | else if (off + 0x80008000ULL < 0x100000000ULL) |
10794 | 0 | { |
10795 | 0 | bfd_put_32 (abfd, ADDIS_R12_R11 + PPC_HA (off), p); |
10796 | 0 | p += 4; |
10797 | 0 | if (load) |
10798 | 0 | bfd_put_32 (abfd, LD_R12_0R12 + PPC_LO (off), p); |
10799 | 0 | else |
10800 | 0 | bfd_put_32 (abfd, ADDI_R12_R12 + PPC_LO (off), p); |
10801 | 0 | p += 4; |
10802 | 0 | } |
10803 | 0 | else |
10804 | 0 | { |
10805 | 0 | if (off + 0x800000000000ULL < 0x1000000000000ULL) |
10806 | 0 | { |
10807 | 0 | bfd_put_32 (abfd, LI_R12_0 + ((off >> 32) & 0xffff), p); |
10808 | 0 | p += 4; |
10809 | 0 | } |
10810 | 0 | else |
10811 | 0 | { |
10812 | 0 | bfd_put_32 (abfd, LIS_R12 + ((off >> 48) & 0xffff), p); |
10813 | 0 | p += 4; |
10814 | 0 | if (((off >> 32) & 0xffff) != 0) |
10815 | 0 | { |
10816 | 0 | bfd_put_32 (abfd, ORI_R12_R12_0 + ((off >> 32) & 0xffff), p); |
10817 | 0 | p += 4; |
10818 | 0 | } |
10819 | 0 | } |
10820 | 0 | if (((off >> 32) & 0xffffffffULL) != 0) |
10821 | 0 | { |
10822 | 0 | bfd_put_32 (abfd, SLDI_R12_R12_32, p); |
10823 | 0 | p += 4; |
10824 | 0 | } |
10825 | 0 | if (PPC_HI (off) != 0) |
10826 | 0 | { |
10827 | 0 | bfd_put_32 (abfd, ORIS_R12_R12_0 + PPC_HI (off), p); |
10828 | 0 | p += 4; |
10829 | 0 | } |
10830 | 0 | if (PPC_LO (off) != 0) |
10831 | 0 | { |
10832 | 0 | bfd_put_32 (abfd, ORI_R12_R12_0 + PPC_LO (off), p); |
10833 | 0 | p += 4; |
10834 | 0 | } |
10835 | 0 | if (load) |
10836 | 0 | bfd_put_32 (abfd, LDX_R12_R11_R12, p); |
10837 | 0 | else |
10838 | 0 | bfd_put_32 (abfd, ADD_R12_R11_R12, p); |
10839 | 0 | p += 4; |
10840 | 0 | } |
10841 | 0 | return p; |
10842 | 0 | } |
10843 | | |
10844 | | static unsigned int |
10845 | | size_offset (bfd_vma off) |
10846 | 0 | { |
10847 | 0 | unsigned int size; |
10848 | 0 | if (off + 0x8000 < 0x10000) |
10849 | 0 | size = 4; |
10850 | 0 | else if (off + 0x80008000ULL < 0x100000000ULL) |
10851 | 0 | size = 8; |
10852 | 0 | else |
10853 | 0 | { |
10854 | 0 | if (off + 0x800000000000ULL < 0x1000000000000ULL) |
10855 | 0 | size = 4; |
10856 | 0 | else |
10857 | 0 | { |
10858 | 0 | size = 4; |
10859 | 0 | if (((off >> 32) & 0xffff) != 0) |
10860 | 0 | size += 4; |
10861 | 0 | } |
10862 | 0 | if (((off >> 32) & 0xffffffffULL) != 0) |
10863 | 0 | size += 4; |
10864 | 0 | if (PPC_HI (off) != 0) |
10865 | 0 | size += 4; |
10866 | 0 | if (PPC_LO (off) != 0) |
10867 | 0 | size += 4; |
10868 | 0 | size += 4; |
10869 | 0 | } |
10870 | 0 | return size + 16; |
10871 | 0 | } |
10872 | | |
10873 | | static unsigned int |
10874 | | num_relocs_for_offset (bfd_vma off) |
10875 | 0 | { |
10876 | 0 | unsigned int num_rel; |
10877 | 0 | if (off + 0x8000 < 0x10000) |
10878 | 0 | num_rel = 1; |
10879 | 0 | else if (off + 0x80008000ULL < 0x100000000ULL) |
10880 | 0 | num_rel = 2; |
10881 | 0 | else |
10882 | 0 | { |
10883 | 0 | num_rel = 1; |
10884 | 0 | if (off + 0x800000000000ULL >= 0x1000000000000ULL |
10885 | 0 | && ((off >> 32) & 0xffff) != 0) |
10886 | 0 | num_rel += 1; |
10887 | 0 | if (PPC_HI (off) != 0) |
10888 | 0 | num_rel += 1; |
10889 | 0 | if (PPC_LO (off) != 0) |
10890 | 0 | num_rel += 1; |
10891 | 0 | } |
10892 | 0 | return num_rel; |
10893 | 0 | } |
10894 | | |
10895 | | static Elf_Internal_Rela * |
10896 | | emit_relocs_for_offset (struct bfd_link_info *info, Elf_Internal_Rela *r, |
10897 | | bfd_vma roff, bfd_vma targ, bfd_vma off) |
10898 | 0 | { |
10899 | 0 | bfd_vma relative_targ = targ - (roff - 8); |
10900 | 0 | if (bfd_big_endian (info->output_bfd)) |
10901 | 0 | roff += 2; |
10902 | 0 | r->r_offset = roff; |
10903 | 0 | r->r_addend = relative_targ + roff; |
10904 | 0 | if (off + 0x8000 < 0x10000) |
10905 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16); |
10906 | 0 | else if (off + 0x80008000ULL < 0x100000000ULL) |
10907 | 0 | { |
10908 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HA); |
10909 | 0 | ++r; |
10910 | 0 | roff += 4; |
10911 | 0 | r->r_offset = roff; |
10912 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO); |
10913 | 0 | r->r_addend = relative_targ + roff; |
10914 | 0 | } |
10915 | 0 | else |
10916 | 0 | { |
10917 | 0 | if (off + 0x800000000000ULL < 0x1000000000000ULL) |
10918 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER); |
10919 | 0 | else |
10920 | 0 | { |
10921 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHEST); |
10922 | 0 | if (((off >> 32) & 0xffff) != 0) |
10923 | 0 | { |
10924 | 0 | ++r; |
10925 | 0 | roff += 4; |
10926 | 0 | r->r_offset = roff; |
10927 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHER); |
10928 | 0 | r->r_addend = relative_targ + roff; |
10929 | 0 | } |
10930 | 0 | } |
10931 | 0 | if (((off >> 32) & 0xffffffffULL) != 0) |
10932 | 0 | roff += 4; |
10933 | 0 | if (PPC_HI (off) != 0) |
10934 | 0 | { |
10935 | 0 | ++r; |
10936 | 0 | roff += 4; |
10937 | 0 | r->r_offset = roff; |
10938 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGH); |
10939 | 0 | r->r_addend = relative_targ + roff; |
10940 | 0 | } |
10941 | 0 | if (PPC_LO (off) != 0) |
10942 | 0 | { |
10943 | 0 | ++r; |
10944 | 0 | roff += 4; |
10945 | 0 | r->r_offset = roff; |
10946 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_LO); |
10947 | 0 | r->r_addend = relative_targ + roff; |
10948 | 0 | } |
10949 | 0 | } |
10950 | 0 | return r; |
10951 | 0 | } |
10952 | | |
10953 | | static bfd_byte * |
10954 | | build_power10_offset (bfd *abfd, bfd_byte *p, bfd_vma off, int odd, |
10955 | | bool load) |
10956 | 0 | { |
10957 | 0 | uint64_t insn; |
10958 | 0 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
10959 | 0 | { |
10960 | 0 | off -= odd; |
10961 | 0 | if (odd) |
10962 | 0 | { |
10963 | 0 | bfd_put_32 (abfd, NOP, p); |
10964 | 0 | p += 4; |
10965 | 0 | } |
10966 | 0 | if (load) |
10967 | 0 | insn = PLD_R12_PC; |
10968 | 0 | else |
10969 | 0 | insn = PADDI_R12_PC; |
10970 | 0 | insn |= D34 (off); |
10971 | 0 | bfd_put_32 (abfd, insn >> 32, p); |
10972 | 0 | p += 4; |
10973 | 0 | bfd_put_32 (abfd, insn, p); |
10974 | 0 | } |
10975 | | /* The minimum value for paddi is -0x200000000. The minimum value |
10976 | | for li is -0x8000, which when shifted by 34 and added gives a |
10977 | | minimum value of -0x2000200000000. The maximum value is |
10978 | | 0x1ffffffff+0x7fff<<34 which is 0x2000200000000-1. */ |
10979 | 0 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
10980 | 0 | { |
10981 | 0 | off -= 8 - odd; |
10982 | 0 | bfd_put_32 (abfd, LI_R11_0 | (HA34 (off) & 0xffff), p); |
10983 | 0 | p += 4; |
10984 | 0 | if (!odd) |
10985 | 0 | { |
10986 | 0 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
10987 | 0 | p += 4; |
10988 | 0 | } |
10989 | 0 | insn = PADDI_R12_PC | D34 (off); |
10990 | 0 | bfd_put_32 (abfd, insn >> 32, p); |
10991 | 0 | p += 4; |
10992 | 0 | bfd_put_32 (abfd, insn, p); |
10993 | 0 | p += 4; |
10994 | 0 | if (odd) |
10995 | 0 | { |
10996 | 0 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
10997 | 0 | p += 4; |
10998 | 0 | } |
10999 | 0 | if (load) |
11000 | 0 | bfd_put_32 (abfd, LDX_R12_R11_R12, p); |
11001 | 0 | else |
11002 | 0 | bfd_put_32 (abfd, ADD_R12_R11_R12, p); |
11003 | 0 | } |
11004 | 0 | else |
11005 | 0 | { |
11006 | 0 | off -= odd + 8; |
11007 | 0 | bfd_put_32 (abfd, LIS_R11 | ((HA34 (off) >> 16) & 0x3fff), p); |
11008 | 0 | p += 4; |
11009 | 0 | bfd_put_32 (abfd, ORI_R11_R11_0 | (HA34 (off) & 0xffff), p); |
11010 | 0 | p += 4; |
11011 | 0 | if (odd) |
11012 | 0 | { |
11013 | 0 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
11014 | 0 | p += 4; |
11015 | 0 | } |
11016 | 0 | insn = PADDI_R12_PC | D34 (off); |
11017 | 0 | bfd_put_32 (abfd, insn >> 32, p); |
11018 | 0 | p += 4; |
11019 | 0 | bfd_put_32 (abfd, insn, p); |
11020 | 0 | p += 4; |
11021 | 0 | if (!odd) |
11022 | 0 | { |
11023 | 0 | bfd_put_32 (abfd, SLDI_R11_R11_34, p); |
11024 | 0 | p += 4; |
11025 | 0 | } |
11026 | 0 | if (load) |
11027 | 0 | bfd_put_32 (abfd, LDX_R12_R11_R12, p); |
11028 | 0 | else |
11029 | 0 | bfd_put_32 (abfd, ADD_R12_R11_R12, p); |
11030 | 0 | } |
11031 | 0 | p += 4; |
11032 | 0 | return p; |
11033 | 0 | } |
11034 | | |
11035 | | static unsigned int |
11036 | | size_power10_offset (bfd_vma off, int odd) |
11037 | 0 | { |
11038 | 0 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
11039 | 0 | return odd + 8; |
11040 | 0 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
11041 | 0 | return 20; |
11042 | 0 | else |
11043 | 0 | return 24; |
11044 | 0 | } |
11045 | | |
11046 | | static unsigned int |
11047 | | num_relocs_for_power10_offset (bfd_vma off, int odd) |
11048 | 0 | { |
11049 | 0 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
11050 | 0 | return 1; |
11051 | 0 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
11052 | 0 | return 2; |
11053 | 0 | else |
11054 | 0 | return 3; |
11055 | 0 | } |
11056 | | |
11057 | | static Elf_Internal_Rela * |
11058 | | emit_relocs_for_power10_offset (struct bfd_link_info *info, |
11059 | | Elf_Internal_Rela *r, bfd_vma roff, |
11060 | | bfd_vma targ, bfd_vma off, int odd) |
11061 | 0 | { |
11062 | 0 | if (off - odd + (1ULL << 33) < 1ULL << 34) |
11063 | 0 | roff += odd; |
11064 | 0 | else if (off - (8 - odd) + (0x20002ULL << 32) < 0x40004ULL << 32) |
11065 | 0 | { |
11066 | 0 | int d_offset = bfd_big_endian (info->output_bfd) ? 2 : 0; |
11067 | 0 | r->r_offset = roff + d_offset; |
11068 | 0 | r->r_addend = targ + 8 - odd - d_offset; |
11069 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHERA34); |
11070 | 0 | ++r; |
11071 | 0 | roff += 8 - odd; |
11072 | 0 | } |
11073 | 0 | else |
11074 | 0 | { |
11075 | 0 | int d_offset = bfd_big_endian (info->output_bfd) ? 2 : 0; |
11076 | 0 | r->r_offset = roff + d_offset; |
11077 | 0 | r->r_addend = targ + 8 + odd - d_offset; |
11078 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHESTA34); |
11079 | 0 | ++r; |
11080 | 0 | roff += 4; |
11081 | 0 | r->r_offset = roff + d_offset; |
11082 | 0 | r->r_addend = targ + 4 + odd - d_offset; |
11083 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL16_HIGHERA34); |
11084 | 0 | ++r; |
11085 | 0 | roff += 4 + odd; |
11086 | 0 | } |
11087 | 0 | r->r_offset = roff; |
11088 | 0 | r->r_addend = targ; |
11089 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_PCREL34); |
11090 | 0 | return r; |
11091 | 0 | } |
11092 | | |
11093 | | /* Emit .eh_frame opcode to advance pc by DELTA. */ |
11094 | | |
11095 | | static bfd_byte * |
11096 | | eh_advance (bfd *abfd, bfd_byte *eh, unsigned int delta) |
11097 | 0 | { |
11098 | 0 | delta /= 4; |
11099 | 0 | if (delta < 64) |
11100 | 0 | *eh++ = DW_CFA_advance_loc + delta; |
11101 | 0 | else if (delta < 256) |
11102 | 0 | { |
11103 | 0 | *eh++ = DW_CFA_advance_loc1; |
11104 | 0 | *eh++ = delta; |
11105 | 0 | } |
11106 | 0 | else if (delta < 65536) |
11107 | 0 | { |
11108 | 0 | *eh++ = DW_CFA_advance_loc2; |
11109 | 0 | bfd_put_16 (abfd, delta, eh); |
11110 | 0 | eh += 2; |
11111 | 0 | } |
11112 | 0 | else |
11113 | 0 | { |
11114 | 0 | *eh++ = DW_CFA_advance_loc4; |
11115 | 0 | bfd_put_32 (abfd, delta, eh); |
11116 | 0 | eh += 4; |
11117 | 0 | } |
11118 | 0 | return eh; |
11119 | 0 | } |
11120 | | |
11121 | | /* Size of required .eh_frame opcode to advance pc by DELTA. */ |
11122 | | |
11123 | | static unsigned int |
11124 | | eh_advance_size (unsigned int delta) |
11125 | 0 | { |
11126 | 0 | if (delta < 64 * 4) |
11127 | | /* DW_CFA_advance_loc+[1..63]. */ |
11128 | 0 | return 1; |
11129 | 0 | if (delta < 256 * 4) |
11130 | | /* DW_CFA_advance_loc1, byte. */ |
11131 | 0 | return 2; |
11132 | 0 | if (delta < 65536 * 4) |
11133 | | /* DW_CFA_advance_loc2, 2 bytes. */ |
11134 | 0 | return 3; |
11135 | | /* DW_CFA_advance_loc4, 4 bytes. */ |
11136 | 0 | return 5; |
11137 | 0 | } |
11138 | | |
11139 | | /* With power7 weakly ordered memory model, it is possible for ld.so |
11140 | | to update a plt entry in one thread and have another thread see a |
11141 | | stale zero toc entry. To avoid this we need some sort of acquire |
11142 | | barrier in the call stub. One solution is to make the load of the |
11143 | | toc word seem to appear to depend on the load of the function entry |
11144 | | word. Another solution is to test for r2 being zero, and branch to |
11145 | | the appropriate glink entry if so. |
11146 | | |
11147 | | . fake dep barrier compare |
11148 | | . ld 12,xxx(2) ld 12,xxx(2) |
11149 | | . mtctr 12 mtctr 12 |
11150 | | . xor 11,12,12 ld 2,xxx+8(2) |
11151 | | . add 2,2,11 cmpldi 2,0 |
11152 | | . ld 2,xxx+8(2) bnectr+ |
11153 | | . bctr b <glink_entry> |
11154 | | |
11155 | | The solution involving the compare turns out to be faster, so |
11156 | | that's what we use unless the branch won't reach. */ |
11157 | | |
11158 | 0 | #define ALWAYS_USE_FAKE_DEP 0 |
11159 | 0 | #define ALWAYS_EMIT_R2SAVE 0 |
11160 | | |
11161 | | static inline unsigned int |
11162 | | plt_stub_size (struct ppc_link_hash_table *htab, |
11163 | | struct ppc_stub_hash_entry *stub_entry, |
11164 | | bfd_vma off, |
11165 | | unsigned int odd) |
11166 | 0 | { |
11167 | 0 | unsigned size; |
11168 | |
|
11169 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
11170 | 0 | { |
11171 | 0 | size = 8 + size_power10_offset (off, odd); |
11172 | 0 | if (stub_entry->type.r2save) |
11173 | 0 | size += 4; |
11174 | 0 | } |
11175 | 0 | else if (stub_entry->type.sub == ppc_stub_p9notoc) |
11176 | 0 | { |
11177 | 0 | size = 8 + size_offset (off - 8); |
11178 | 0 | if (stub_entry->type.r2save) |
11179 | 0 | size += 4; |
11180 | 0 | } |
11181 | 0 | else |
11182 | 0 | { |
11183 | 0 | size = 12; |
11184 | 0 | if (ALWAYS_EMIT_R2SAVE || stub_entry->type.r2save) |
11185 | 0 | size += 4; |
11186 | 0 | if (PPC_HA (off) != 0) |
11187 | 0 | size += 4; |
11188 | 0 | if (htab->opd_abi) |
11189 | 0 | { |
11190 | 0 | size += 4; |
11191 | 0 | if (htab->params->plt_static_chain) |
11192 | 0 | size += 4; |
11193 | 0 | if (htab->params->plt_thread_safe |
11194 | 0 | && htab->elf.dynamic_sections_created |
11195 | 0 | && stub_entry->h != NULL |
11196 | 0 | && stub_entry->h->elf.dynindx != -1) |
11197 | 0 | size += 8; |
11198 | 0 | if (PPC_HA (off + 8 + 8 * htab->params->plt_static_chain) |
11199 | 0 | != PPC_HA (off)) |
11200 | 0 | size += 4; |
11201 | 0 | } |
11202 | 0 | } |
11203 | 0 | if (stub_entry->h != NULL |
11204 | 0 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
11205 | 0 | && htab->params->tls_get_addr_opt) |
11206 | 0 | { |
11207 | 0 | if (!htab->params->no_tls_get_addr_regsave) |
11208 | 0 | { |
11209 | 0 | size += 30 * 4; |
11210 | 0 | if (stub_entry->type.r2save) |
11211 | 0 | size += 4; |
11212 | 0 | } |
11213 | 0 | else |
11214 | 0 | { |
11215 | 0 | size += 7 * 4; |
11216 | 0 | if (stub_entry->type.r2save) |
11217 | 0 | size += 6 * 4; |
11218 | 0 | } |
11219 | 0 | } |
11220 | 0 | return size; |
11221 | 0 | } |
11222 | | |
11223 | | /* Depending on the sign of plt_stub_align: |
11224 | | If positive, return the padding to align to a 2**plt_stub_align |
11225 | | boundary. |
11226 | | If negative, if this stub would cross fewer 2**plt_stub_align |
11227 | | boundaries if we align, then return the padding needed to do so. */ |
11228 | | |
11229 | | static inline unsigned int |
11230 | | plt_stub_pad (int plt_stub_align, |
11231 | | bfd_vma stub_off, |
11232 | | unsigned int stub_size) |
11233 | 0 | { |
11234 | 0 | unsigned int stub_align; |
11235 | |
|
11236 | 0 | if (plt_stub_align >= 0) |
11237 | 0 | stub_align = 1u << plt_stub_align; |
11238 | 0 | else |
11239 | 0 | { |
11240 | 0 | stub_align = 1u << -plt_stub_align; |
11241 | 0 | if (((stub_off + stub_size - 1) & -stub_align) - (stub_off & -stub_align) |
11242 | 0 | <= ((stub_size - 1) & -stub_align)) |
11243 | 0 | return 0; |
11244 | 0 | } |
11245 | 0 | return stub_align - 1 - ((stub_off - 1) & (stub_align - 1)); |
11246 | 0 | } |
11247 | | |
11248 | | /* Build a toc using .plt call stub. */ |
11249 | | |
11250 | | static inline bfd_byte * |
11251 | | build_plt_stub (struct ppc_link_hash_table *htab, |
11252 | | struct ppc_stub_hash_entry *stub_entry, |
11253 | | bfd_byte *p, bfd_vma offset, Elf_Internal_Rela *r) |
11254 | 0 | { |
11255 | 0 | bfd *obfd = htab->params->stub_bfd; |
11256 | 0 | bool plt_load_toc = htab->opd_abi; |
11257 | 0 | bool plt_static_chain = htab->params->plt_static_chain; |
11258 | 0 | bool plt_thread_safe = (htab->params->plt_thread_safe |
11259 | 0 | && htab->elf.dynamic_sections_created |
11260 | 0 | && stub_entry->h != NULL |
11261 | 0 | && stub_entry->h->elf.dynindx != -1); |
11262 | 0 | bool use_fake_dep = plt_thread_safe; |
11263 | 0 | bfd_vma cmp_branch_off = 0; |
11264 | |
|
11265 | 0 | if (!ALWAYS_USE_FAKE_DEP |
11266 | 0 | && plt_load_toc |
11267 | 0 | && plt_thread_safe |
11268 | 0 | && !(stub_entry->h != NULL |
11269 | 0 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
11270 | 0 | && htab->params->tls_get_addr_opt)) |
11271 | 0 | { |
11272 | 0 | bfd_vma pltoff = stub_entry->plt_ent->plt.offset & ~1; |
11273 | 0 | bfd_vma pltindex = ((pltoff - PLT_INITIAL_ENTRY_SIZE (htab)) |
11274 | 0 | / PLT_ENTRY_SIZE (htab)); |
11275 | 0 | bfd_vma glinkoff = GLINK_PLTRESOLVE_SIZE (htab) + pltindex * 8; |
11276 | 0 | bfd_vma to, from; |
11277 | |
|
11278 | 0 | if (pltindex > 32768) |
11279 | 0 | glinkoff += (pltindex - 32768) * 4; |
11280 | 0 | to = (glinkoff |
11281 | 0 | + htab->glink->output_offset |
11282 | 0 | + htab->glink->output_section->vma); |
11283 | 0 | from = (p - stub_entry->group->stub_sec->contents |
11284 | 0 | + 4 * (ALWAYS_EMIT_R2SAVE || stub_entry->type.r2save) |
11285 | 0 | + 4 * (PPC_HA (offset) != 0) |
11286 | 0 | + 4 * (PPC_HA (offset + 8 + 8 * plt_static_chain) |
11287 | 0 | != PPC_HA (offset)) |
11288 | 0 | + 4 * (plt_static_chain != 0) |
11289 | 0 | + 20 |
11290 | 0 | + stub_entry->group->stub_sec->output_offset |
11291 | 0 | + stub_entry->group->stub_sec->output_section->vma); |
11292 | 0 | cmp_branch_off = to - from; |
11293 | 0 | use_fake_dep = cmp_branch_off + (1 << 25) >= (1 << 26); |
11294 | 0 | } |
11295 | |
|
11296 | 0 | if (PPC_HA (offset) != 0) |
11297 | 0 | { |
11298 | 0 | if (r != NULL) |
11299 | 0 | { |
11300 | 0 | if (ALWAYS_EMIT_R2SAVE || stub_entry->type.r2save) |
11301 | 0 | r[0].r_offset += 4; |
11302 | 0 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); |
11303 | 0 | r[1].r_offset = r[0].r_offset + 4; |
11304 | 0 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
11305 | 0 | r[1].r_addend = r[0].r_addend; |
11306 | 0 | if (plt_load_toc) |
11307 | 0 | { |
11308 | 0 | if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
11309 | 0 | { |
11310 | 0 | r[2].r_offset = r[1].r_offset + 4; |
11311 | 0 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO); |
11312 | 0 | r[2].r_addend = r[0].r_addend; |
11313 | 0 | } |
11314 | 0 | else |
11315 | 0 | { |
11316 | 0 | r[2].r_offset = r[1].r_offset + 8 + 8 * use_fake_dep; |
11317 | 0 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
11318 | 0 | r[2].r_addend = r[0].r_addend + 8; |
11319 | 0 | if (plt_static_chain) |
11320 | 0 | { |
11321 | 0 | r[3].r_offset = r[2].r_offset + 4; |
11322 | 0 | r[3].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
11323 | 0 | r[3].r_addend = r[0].r_addend + 16; |
11324 | 0 | } |
11325 | 0 | } |
11326 | 0 | } |
11327 | 0 | } |
11328 | 0 | if (ALWAYS_EMIT_R2SAVE || stub_entry->type.r2save) |
11329 | 0 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; |
11330 | 0 | if (plt_load_toc) |
11331 | 0 | { |
11332 | 0 | bfd_put_32 (obfd, ADDIS_R11_R2 | PPC_HA (offset), p), p += 4; |
11333 | 0 | bfd_put_32 (obfd, LD_R12_0R11 | PPC_LO (offset), p), p += 4; |
11334 | 0 | } |
11335 | 0 | else |
11336 | 0 | { |
11337 | 0 | bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; |
11338 | 0 | bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (offset), p), p += 4; |
11339 | 0 | } |
11340 | 0 | if (plt_load_toc |
11341 | 0 | && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
11342 | 0 | { |
11343 | 0 | bfd_put_32 (obfd, ADDI_R11_R11 | PPC_LO (offset), p), p += 4; |
11344 | 0 | offset = 0; |
11345 | 0 | } |
11346 | 0 | bfd_put_32 (obfd, MTCTR_R12, p), p += 4; |
11347 | 0 | if (plt_load_toc) |
11348 | 0 | { |
11349 | 0 | if (use_fake_dep) |
11350 | 0 | { |
11351 | 0 | bfd_put_32 (obfd, XOR_R2_R12_R12, p), p += 4; |
11352 | 0 | bfd_put_32 (obfd, ADD_R11_R11_R2, p), p += 4; |
11353 | 0 | } |
11354 | 0 | bfd_put_32 (obfd, LD_R2_0R11 | PPC_LO (offset + 8), p), p += 4; |
11355 | 0 | if (plt_static_chain) |
11356 | 0 | bfd_put_32 (obfd, LD_R11_0R11 | PPC_LO (offset + 16), p), p += 4; |
11357 | 0 | } |
11358 | 0 | } |
11359 | 0 | else |
11360 | 0 | { |
11361 | 0 | if (r != NULL) |
11362 | 0 | { |
11363 | 0 | if (ALWAYS_EMIT_R2SAVE || stub_entry->type.r2save) |
11364 | 0 | r[0].r_offset += 4; |
11365 | 0 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
11366 | 0 | if (plt_load_toc) |
11367 | 0 | { |
11368 | 0 | if (PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
11369 | 0 | { |
11370 | 0 | r[1].r_offset = r[0].r_offset + 4; |
11371 | 0 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16); |
11372 | 0 | r[1].r_addend = r[0].r_addend; |
11373 | 0 | } |
11374 | 0 | else |
11375 | 0 | { |
11376 | 0 | r[1].r_offset = r[0].r_offset + 8 + 8 * use_fake_dep; |
11377 | 0 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
11378 | 0 | r[1].r_addend = r[0].r_addend + 8 + 8 * plt_static_chain; |
11379 | 0 | if (plt_static_chain) |
11380 | 0 | { |
11381 | 0 | r[2].r_offset = r[1].r_offset + 4; |
11382 | 0 | r[2].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
11383 | 0 | r[2].r_addend = r[0].r_addend + 8; |
11384 | 0 | } |
11385 | 0 | } |
11386 | 0 | } |
11387 | 0 | } |
11388 | 0 | if (ALWAYS_EMIT_R2SAVE || stub_entry->type.r2save) |
11389 | 0 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p), p += 4; |
11390 | 0 | bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (offset), p), p += 4; |
11391 | 0 | if (plt_load_toc |
11392 | 0 | && PPC_HA (offset + 8 + 8 * plt_static_chain) != PPC_HA (offset)) |
11393 | 0 | { |
11394 | 0 | bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (offset), p), p += 4; |
11395 | 0 | offset = 0; |
11396 | 0 | } |
11397 | 0 | bfd_put_32 (obfd, MTCTR_R12, p), p += 4; |
11398 | 0 | if (plt_load_toc) |
11399 | 0 | { |
11400 | 0 | if (use_fake_dep) |
11401 | 0 | { |
11402 | 0 | bfd_put_32 (obfd, XOR_R11_R12_R12, p), p += 4; |
11403 | 0 | bfd_put_32 (obfd, ADD_R2_R2_R11, p), p += 4; |
11404 | 0 | } |
11405 | 0 | if (plt_static_chain) |
11406 | 0 | bfd_put_32 (obfd, LD_R11_0R2 | PPC_LO (offset + 16), p), p += 4; |
11407 | 0 | bfd_put_32 (obfd, LD_R2_0R2 | PPC_LO (offset + 8), p), p += 4; |
11408 | 0 | } |
11409 | 0 | } |
11410 | 0 | if (plt_load_toc && plt_thread_safe && !use_fake_dep) |
11411 | 0 | { |
11412 | 0 | bfd_put_32 (obfd, CMPLDI_R2_0, p), p += 4; |
11413 | 0 | bfd_put_32 (obfd, BNECTR_P4, p), p += 4; |
11414 | 0 | bfd_put_32 (obfd, B_DOT | (cmp_branch_off & 0x3fffffc), p), p += 4; |
11415 | 0 | } |
11416 | 0 | else |
11417 | 0 | bfd_put_32 (obfd, BCTR, p), p += 4; |
11418 | 0 | return p; |
11419 | 0 | } |
11420 | | |
11421 | | /* Build a special .plt call stub for __tls_get_addr. */ |
11422 | | |
11423 | | #define LD_R0_0R3 0xe8030000 |
11424 | | #define LD_R12_0R3 0xe9830000 |
11425 | | #define MR_R0_R3 0x7c601b78 |
11426 | | #define CMPDI_R0_0 0x2c200000 |
11427 | | #define ADD_R3_R12_R13 0x7c6c6a14 |
11428 | | #define BEQLR 0x4d820020 |
11429 | | #define MR_R3_R0 0x7c030378 |
11430 | | #define BCTRL 0x4e800421 |
11431 | | |
11432 | | static bfd_byte * |
11433 | | build_tls_get_addr_head (struct ppc_link_hash_table *htab, |
11434 | | struct ppc_stub_hash_entry *stub_entry, |
11435 | | bfd_byte *p) |
11436 | 0 | { |
11437 | 0 | bfd *obfd = htab->params->stub_bfd; |
11438 | |
|
11439 | 0 | bfd_put_32 (obfd, LD_R0_0R3 + 0, p), p += 4; |
11440 | 0 | bfd_put_32 (obfd, LD_R12_0R3 + 8, p), p += 4; |
11441 | 0 | bfd_put_32 (obfd, CMPDI_R0_0, p), p += 4; |
11442 | 0 | bfd_put_32 (obfd, MR_R0_R3, p), p += 4; |
11443 | 0 | bfd_put_32 (obfd, ADD_R3_R12_R13, p), p += 4; |
11444 | 0 | bfd_put_32 (obfd, BEQLR, p), p += 4; |
11445 | 0 | bfd_put_32 (obfd, MR_R3_R0, p), p += 4; |
11446 | |
|
11447 | 0 | if (!htab->params->no_tls_get_addr_regsave) |
11448 | 0 | p = tls_get_addr_prologue (obfd, p, htab); |
11449 | 0 | else if (stub_entry->type.r2save) |
11450 | 0 | { |
11451 | 0 | bfd_put_32 (obfd, MFLR_R0, p); |
11452 | 0 | p += 4; |
11453 | 0 | bfd_put_32 (obfd, STD_R0_0R1 + STK_LINKER (htab), p); |
11454 | 0 | p += 4; |
11455 | 0 | } |
11456 | 0 | return p; |
11457 | 0 | } |
11458 | | |
11459 | | static bfd_byte * |
11460 | | build_tls_get_addr_tail (struct ppc_link_hash_table *htab, |
11461 | | struct ppc_stub_hash_entry *stub_entry, |
11462 | | bfd_byte *p, |
11463 | | bfd_byte *loc) |
11464 | 0 | { |
11465 | 0 | bfd *obfd = htab->params->stub_bfd; |
11466 | |
|
11467 | 0 | if (!htab->params->no_tls_get_addr_regsave) |
11468 | 0 | { |
11469 | 0 | bfd_put_32 (obfd, BCTRL, p - 4); |
11470 | |
|
11471 | 0 | if (stub_entry->type.r2save) |
11472 | 0 | { |
11473 | 0 | bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p); |
11474 | 0 | p += 4; |
11475 | 0 | } |
11476 | 0 | p = tls_get_addr_epilogue (obfd, p, htab); |
11477 | 0 | } |
11478 | 0 | else if (stub_entry->type.r2save) |
11479 | 0 | { |
11480 | 0 | bfd_put_32 (obfd, BCTRL, p - 4); |
11481 | |
|
11482 | 0 | bfd_put_32 (obfd, LD_R2_0R1 + STK_TOC (htab), p); |
11483 | 0 | p += 4; |
11484 | 0 | bfd_put_32 (obfd, LD_R0_0R1 + STK_LINKER (htab), p); |
11485 | 0 | p += 4; |
11486 | 0 | bfd_put_32 (obfd, MTLR_R0, p); |
11487 | 0 | p += 4; |
11488 | 0 | bfd_put_32 (obfd, BLR, p); |
11489 | 0 | p += 4; |
11490 | 0 | } |
11491 | |
|
11492 | 0 | if (htab->glink_eh_frame != NULL |
11493 | 0 | && htab->glink_eh_frame->size != 0) |
11494 | 0 | { |
11495 | 0 | bfd_byte *base, *eh; |
11496 | |
|
11497 | 0 | base = htab->glink_eh_frame->contents + stub_entry->group->eh_base + 17; |
11498 | 0 | eh = base + stub_entry->group->eh_size; |
11499 | |
|
11500 | 0 | if (!htab->params->no_tls_get_addr_regsave) |
11501 | 0 | { |
11502 | 0 | unsigned int cfa_updt, delta, i; |
11503 | | |
11504 | | /* After the bctrl, lr has been modified so we need to emit |
11505 | | .eh_frame info saying the return address is on the stack. In |
11506 | | fact we must put the EH info at or before the call rather |
11507 | | than after it, because the EH info for a call needs to be |
11508 | | specified by that point. |
11509 | | See libgcc/unwind-dw2.c execute_cfa_program. |
11510 | | Any stack pointer update must be described immediately after |
11511 | | the instruction making the change, and since the stdu occurs |
11512 | | after saving regs we put all the reg saves and the cfa |
11513 | | change there. */ |
11514 | 0 | cfa_updt = stub_entry->stub_offset + 18 * 4; |
11515 | 0 | delta = cfa_updt - stub_entry->group->lr_restore; |
11516 | 0 | stub_entry->group->lr_restore |
11517 | 0 | = stub_entry->stub_offset + (p - loc) - 4; |
11518 | 0 | eh = eh_advance (htab->elf.dynobj, eh, delta); |
11519 | 0 | *eh++ = DW_CFA_def_cfa_offset; |
11520 | 0 | if (htab->opd_abi) |
11521 | 0 | { |
11522 | 0 | *eh++ = 128; |
11523 | 0 | *eh++ = 1; |
11524 | 0 | } |
11525 | 0 | else |
11526 | 0 | *eh++ = 96; |
11527 | 0 | *eh++ = DW_CFA_offset_extended_sf; |
11528 | 0 | *eh++ = 65; |
11529 | 0 | *eh++ = (-16 / 8) & 0x7f; |
11530 | 0 | for (i = 4; i < 12; i++) |
11531 | 0 | { |
11532 | 0 | *eh++ = DW_CFA_offset + i; |
11533 | 0 | *eh++ = (htab->opd_abi ? 13 : 12) - i; |
11534 | 0 | } |
11535 | 0 | *eh++ = (DW_CFA_advance_loc |
11536 | 0 | + (stub_entry->group->lr_restore - 8 - cfa_updt) / 4); |
11537 | 0 | *eh++ = DW_CFA_def_cfa_offset; |
11538 | 0 | *eh++ = 0; |
11539 | 0 | for (i = 4; i < 12; i++) |
11540 | 0 | *eh++ = DW_CFA_restore + i; |
11541 | 0 | *eh++ = DW_CFA_advance_loc + 2; |
11542 | 0 | *eh++ = DW_CFA_restore_extended; |
11543 | 0 | *eh++ = 65; |
11544 | 0 | stub_entry->group->eh_size = eh - base; |
11545 | 0 | } |
11546 | 0 | else if (stub_entry->type.r2save) |
11547 | 0 | { |
11548 | 0 | unsigned int lr_used, delta; |
11549 | |
|
11550 | 0 | lr_used = stub_entry->stub_offset + (p - 20 - loc); |
11551 | 0 | delta = lr_used - stub_entry->group->lr_restore; |
11552 | 0 | stub_entry->group->lr_restore = lr_used + 16; |
11553 | 0 | eh = eh_advance (htab->elf.dynobj, eh, delta); |
11554 | 0 | *eh++ = DW_CFA_offset_extended_sf; |
11555 | 0 | *eh++ = 65; |
11556 | 0 | *eh++ = -(STK_LINKER (htab) / 8) & 0x7f; |
11557 | 0 | *eh++ = DW_CFA_advance_loc + 4; |
11558 | 0 | *eh++ = DW_CFA_restore_extended; |
11559 | 0 | *eh++ = 65; |
11560 | 0 | stub_entry->group->eh_size = eh - base; |
11561 | 0 | } |
11562 | 0 | } |
11563 | 0 | return p; |
11564 | 0 | } |
11565 | | |
11566 | | static Elf_Internal_Rela * |
11567 | | get_relocs (asection *sec, int count) |
11568 | 0 | { |
11569 | 0 | Elf_Internal_Rela *relocs; |
11570 | 0 | struct bfd_elf_section_data *elfsec_data; |
11571 | |
|
11572 | 0 | elfsec_data = elf_section_data (sec); |
11573 | 0 | relocs = elfsec_data->relocs; |
11574 | 0 | if (relocs == NULL) |
11575 | 0 | { |
11576 | 0 | bfd_size_type relsize; |
11577 | 0 | relsize = sec->reloc_count * sizeof (*relocs); |
11578 | 0 | relocs = bfd_malloc (relsize); |
11579 | 0 | if (relocs == NULL) |
11580 | 0 | return NULL; |
11581 | 0 | elfsec_data->relocs = relocs; |
11582 | 0 | elfsec_data->rela.hdr = bfd_zalloc (sec->owner, |
11583 | 0 | sizeof (Elf_Internal_Shdr)); |
11584 | 0 | if (elfsec_data->rela.hdr == NULL) |
11585 | 0 | return NULL; |
11586 | 0 | elfsec_data->rela.hdr->sh_size = (sec->reloc_count |
11587 | 0 | * sizeof (Elf64_External_Rela)); |
11588 | 0 | elfsec_data->rela.hdr->sh_entsize = sizeof (Elf64_External_Rela); |
11589 | 0 | sec->reloc_count = 0; |
11590 | 0 | } |
11591 | 0 | relocs += sec->reloc_count; |
11592 | 0 | sec->reloc_count += count; |
11593 | 0 | return relocs; |
11594 | 0 | } |
11595 | | |
11596 | | static bool |
11597 | | swap_reloc_out (bfd *obfd, Elf_Internal_Rela *rel, bfd_byte *loc, asection *s) |
11598 | 0 | { |
11599 | 0 | if ((size_t) (loc - s->contents) >= s->size) |
11600 | 0 | return false; |
11601 | 0 | bfd_elf64_swap_reloca_out (obfd, rel, loc); |
11602 | 0 | return true; |
11603 | 0 | } |
11604 | | |
11605 | | static bool |
11606 | | count_and_swap_reloc_out (bfd *obfd, Elf_Internal_Rela *rel, asection *s) |
11607 | 0 | { |
11608 | 0 | bfd_byte *loc = s->contents; |
11609 | 0 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); |
11610 | 0 | return swap_reloc_out (obfd, rel, loc, s); |
11611 | 0 | } |
11612 | | |
11613 | | |
11614 | | /* Convert the relocs R[0] thru R[-NUM_REL+1], which are all no-symbol |
11615 | | forms, to the equivalent relocs against the global symbol given by |
11616 | | STUB_ENTRY->H. */ |
11617 | | |
11618 | | static bool |
11619 | | use_global_in_relocs (struct ppc_link_hash_table *htab, |
11620 | | struct ppc_stub_hash_entry *stub_entry, |
11621 | | Elf_Internal_Rela *r, unsigned int num_rel) |
11622 | 0 | { |
11623 | 0 | struct elf_link_hash_entry **hashes; |
11624 | 0 | unsigned long symndx; |
11625 | 0 | struct ppc_link_hash_entry *h; |
11626 | 0 | bfd_vma symval; |
11627 | | |
11628 | | /* Relocs are always against symbols in their own object file. Fake |
11629 | | up global sym hashes for the stub bfd (which has no symbols). */ |
11630 | 0 | hashes = elf_sym_hashes (htab->params->stub_bfd); |
11631 | 0 | if (hashes == NULL) |
11632 | 0 | { |
11633 | 0 | bfd_size_type hsize; |
11634 | | |
11635 | | /* When called the first time, stub_globals will contain the |
11636 | | total number of symbols seen during stub sizing. After |
11637 | | allocating, stub_globals is used as an index to fill the |
11638 | | hashes array. */ |
11639 | 0 | hsize = (htab->stub_globals + 1) * sizeof (*hashes); |
11640 | 0 | hashes = bfd_zalloc (htab->params->stub_bfd, hsize); |
11641 | 0 | if (hashes == NULL) |
11642 | 0 | return false; |
11643 | 0 | elf_sym_hashes (htab->params->stub_bfd) = hashes; |
11644 | 0 | htab->stub_globals = 1; |
11645 | 0 | } |
11646 | 0 | symndx = htab->stub_globals++; |
11647 | 0 | h = stub_entry->h; |
11648 | 0 | hashes[symndx] = &h->elf; |
11649 | 0 | if (h->oh != NULL && h->oh->is_func) |
11650 | 0 | h = ppc_follow_link (h->oh); |
11651 | 0 | BFD_ASSERT (h->elf.root.type == bfd_link_hash_defined |
11652 | 0 | || h->elf.root.type == bfd_link_hash_defweak); |
11653 | 0 | symval = defined_sym_val (&h->elf); |
11654 | 0 | while (num_rel-- != 0) |
11655 | 0 | { |
11656 | 0 | r->r_info = ELF64_R_INFO (symndx, ELF64_R_TYPE (r->r_info)); |
11657 | 0 | if (h->elf.root.u.def.section != stub_entry->target_section) |
11658 | 0 | { |
11659 | | /* H is an opd symbol. The addend must be zero, and the |
11660 | | branch reloc is the only one we can convert. */ |
11661 | 0 | r->r_addend = 0; |
11662 | 0 | break; |
11663 | 0 | } |
11664 | 0 | else |
11665 | 0 | r->r_addend -= symval; |
11666 | 0 | --r; |
11667 | 0 | } |
11668 | 0 | return true; |
11669 | 0 | } |
11670 | | |
11671 | | static bfd_vma |
11672 | | get_r2off (struct bfd_link_info *info, |
11673 | | struct ppc_stub_hash_entry *stub_entry) |
11674 | 0 | { |
11675 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
11676 | 0 | bfd_vma r2off = htab->sec_info[stub_entry->target_section->id].toc_off; |
11677 | |
|
11678 | 0 | if (r2off == 0) |
11679 | 0 | { |
11680 | | /* Support linking -R objects. Get the toc pointer from the |
11681 | | opd entry. */ |
11682 | 0 | char buf[8]; |
11683 | 0 | if (!htab->opd_abi) |
11684 | 0 | return r2off; |
11685 | 0 | asection *opd = stub_entry->h->elf.root.u.def.section; |
11686 | 0 | bfd_vma opd_off = stub_entry->h->elf.root.u.def.value; |
11687 | |
|
11688 | 0 | if (strcmp (opd->name, ".opd") != 0 |
11689 | 0 | || opd->reloc_count != 0) |
11690 | 0 | { |
11691 | 0 | info->callbacks->einfo |
11692 | 0 | (_("%P: cannot find opd entry toc for `%pT'\n"), |
11693 | 0 | stub_entry->h->elf.root.root.string); |
11694 | 0 | bfd_set_error (bfd_error_bad_value); |
11695 | 0 | return (bfd_vma) -1; |
11696 | 0 | } |
11697 | 0 | if (!bfd_get_section_contents (opd->owner, opd, buf, opd_off + 8, 8)) |
11698 | 0 | return (bfd_vma) -1; |
11699 | 0 | r2off = bfd_get_64 (opd->owner, buf); |
11700 | 0 | r2off -= elf_gp (info->output_bfd); |
11701 | 0 | } |
11702 | 0 | r2off -= htab->sec_info[stub_entry->group->link_sec->id].toc_off; |
11703 | 0 | return r2off; |
11704 | 0 | } |
11705 | | |
11706 | | /* Debug dump. */ |
11707 | | |
11708 | | static void |
11709 | | dump_stub (const char *header, |
11710 | | struct ppc_stub_hash_entry *stub_entry, |
11711 | | size_t end_offset) |
11712 | 0 | { |
11713 | 0 | const char *t1, *t2, *t3; |
11714 | 0 | switch (stub_entry->type.main) |
11715 | 0 | { |
11716 | 0 | case ppc_stub_none: t1 = "none"; break; |
11717 | 0 | case ppc_stub_long_branch: t1 = "long_branch"; break; |
11718 | 0 | case ppc_stub_plt_branch: t1 = "plt_branch"; break; |
11719 | 0 | case ppc_stub_plt_call: t1 = "plt_call"; break; |
11720 | 0 | case ppc_stub_global_entry: t1 = "global_entry"; break; |
11721 | 0 | case ppc_stub_save_res: t1 = "save_res"; break; |
11722 | 0 | default: t1 = "???"; break; |
11723 | 0 | } |
11724 | 0 | switch (stub_entry->type.sub) |
11725 | 0 | { |
11726 | 0 | case ppc_stub_toc: t2 = "toc"; break; |
11727 | 0 | case ppc_stub_notoc: t2 = "notoc"; break; |
11728 | 0 | case ppc_stub_p9notoc: t2 = "p9notoc"; break; |
11729 | 0 | default: t2 = "???"; break; |
11730 | 0 | } |
11731 | 0 | t3 = stub_entry->type.r2save ? "r2save" : ""; |
11732 | 0 | fprintf (stderr, "%s id = %u type = %s:%s:%s\n", |
11733 | 0 | header, stub_entry->id, t1, t2, t3); |
11734 | 0 | fprintf (stderr, "name = %s\n", stub_entry->root.string); |
11735 | 0 | fprintf (stderr, "offset = 0x%" PRIx64 ":", stub_entry->stub_offset); |
11736 | 0 | for (size_t i = stub_entry->stub_offset; i < end_offset; i += 4) |
11737 | 0 | { |
11738 | 0 | asection *stub_sec = stub_entry->group->stub_sec; |
11739 | 0 | uint32_t *p = (uint32_t *) (stub_sec->contents + i); |
11740 | 0 | fprintf (stderr, " %08x", (uint32_t) bfd_get_32 (stub_sec->owner, p)); |
11741 | 0 | } |
11742 | 0 | fprintf (stderr, "\n"); |
11743 | 0 | } |
11744 | | |
11745 | | static bool |
11746 | | ppc_build_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
11747 | 0 | { |
11748 | 0 | struct ppc_stub_hash_entry *stub_entry; |
11749 | 0 | struct ppc_branch_hash_entry *br_entry; |
11750 | 0 | struct bfd_link_info *info; |
11751 | 0 | struct ppc_link_hash_table *htab; |
11752 | 0 | bfd *obfd; |
11753 | 0 | bfd_byte *loc; |
11754 | 0 | bfd_byte *p, *relp; |
11755 | 0 | bfd_vma targ, off; |
11756 | 0 | Elf_Internal_Rela *r; |
11757 | 0 | asection *plt; |
11758 | 0 | int num_rel; |
11759 | 0 | int odd; |
11760 | 0 | bool is_tga; |
11761 | | |
11762 | | /* Massage our args to the form they really have. */ |
11763 | 0 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
11764 | 0 | info = in_arg; |
11765 | |
|
11766 | 0 | htab = ppc_hash_table (info); |
11767 | 0 | if (htab == NULL) |
11768 | 0 | return false; |
11769 | | |
11770 | 0 | struct _ppc64_elf_section_data *esd |
11771 | 0 | = ppc64_elf_section_data (stub_entry->group->stub_sec); |
11772 | 0 | ++htab->stub_id; |
11773 | 0 | if (stub_entry->id != htab->stub_id |
11774 | 0 | || (stub_entry->type.main != ppc_stub_save_res |
11775 | 0 | && stub_entry->stub_offset < stub_entry->group->stub_sec->size)) |
11776 | 0 | { |
11777 | 0 | BFD_ASSERT (0); |
11778 | 0 | if (stub_entry->id != htab->stub_id) |
11779 | 0 | fprintf (stderr, "Expected id %u, got %u\n", |
11780 | 0 | htab->stub_id, stub_entry->id); |
11781 | 0 | if (stub_entry->stub_offset < stub_entry->group->stub_sec->size) |
11782 | 0 | fprintf (stderr, "Expected offset >= %" PRIx64 ", got %" |
11783 | 0 | PRIx64 "\n", stub_entry->group->stub_sec->size, |
11784 | 0 | stub_entry->stub_offset); |
11785 | 0 | if (esd->sec_type == sec_stub) |
11786 | 0 | dump_stub ("Previous:", esd->u.last_ent, stub_entry->stub_offset); |
11787 | 0 | dump_stub ("Current:", stub_entry, 0); |
11788 | 0 | } |
11789 | 0 | if (esd->sec_type == sec_normal) |
11790 | 0 | esd->sec_type = sec_stub; |
11791 | 0 | if (esd->sec_type == sec_stub) |
11792 | 0 | esd->u.last_ent = stub_entry; |
11793 | 0 | loc = stub_entry->group->stub_sec->contents + stub_entry->stub_offset; |
11794 | |
|
11795 | 0 | htab->stub_count[stub_entry->type.main - 1] += 1; |
11796 | 0 | if (stub_entry->type.main == ppc_stub_long_branch |
11797 | 0 | && stub_entry->type.sub == ppc_stub_toc) |
11798 | 0 | { |
11799 | | /* Branches are relative. This is where we are going to. */ |
11800 | 0 | targ = (stub_entry->target_value |
11801 | 0 | + stub_entry->target_section->output_offset |
11802 | 0 | + stub_entry->target_section->output_section->vma); |
11803 | 0 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
11804 | | |
11805 | | /* And this is where we are coming from. */ |
11806 | 0 | off = (stub_entry->stub_offset |
11807 | 0 | + stub_entry->group->stub_sec->output_offset |
11808 | 0 | + stub_entry->group->stub_sec->output_section->vma); |
11809 | 0 | off = targ - off; |
11810 | |
|
11811 | 0 | p = loc; |
11812 | 0 | obfd = htab->params->stub_bfd; |
11813 | 0 | if (stub_entry->type.r2save) |
11814 | 0 | { |
11815 | 0 | bfd_vma r2off = get_r2off (info, stub_entry); |
11816 | |
|
11817 | 0 | if (r2off == (bfd_vma) -1) |
11818 | 0 | { |
11819 | 0 | htab->stub_error = true; |
11820 | 0 | return false; |
11821 | 0 | } |
11822 | 0 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p); |
11823 | 0 | p += 4; |
11824 | 0 | if (PPC_HA (r2off) != 0) |
11825 | 0 | { |
11826 | 0 | bfd_put_32 (obfd, ADDIS_R2_R2 | PPC_HA (r2off), p); |
11827 | 0 | p += 4; |
11828 | 0 | } |
11829 | 0 | if (PPC_LO (r2off) != 0) |
11830 | 0 | { |
11831 | 0 | bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (r2off), p); |
11832 | 0 | p += 4; |
11833 | 0 | } |
11834 | 0 | off -= p - loc; |
11835 | 0 | } |
11836 | 0 | bfd_put_32 (obfd, B_DOT | (off & 0x3fffffc), p); |
11837 | 0 | p += 4; |
11838 | |
|
11839 | 0 | if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
11840 | 0 | { |
11841 | 0 | _bfd_error_handler |
11842 | 0 | (_("long branch stub `%s' offset overflow"), |
11843 | 0 | stub_entry->root.string); |
11844 | 0 | htab->stub_error = true; |
11845 | 0 | return false; |
11846 | 0 | } |
11847 | | |
11848 | 0 | if (info->emitrelocations) |
11849 | 0 | { |
11850 | 0 | r = get_relocs (stub_entry->group->stub_sec, 1); |
11851 | 0 | if (r == NULL) |
11852 | 0 | return false; |
11853 | 0 | r->r_offset = p - 4 - stub_entry->group->stub_sec->contents; |
11854 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); |
11855 | 0 | r->r_addend = targ; |
11856 | 0 | if (stub_entry->h != NULL |
11857 | 0 | && !use_global_in_relocs (htab, stub_entry, r, 1)) |
11858 | 0 | return false; |
11859 | 0 | } |
11860 | 0 | } |
11861 | 0 | else if (stub_entry->type.main == ppc_stub_plt_branch |
11862 | 0 | && stub_entry->type.sub == ppc_stub_toc) |
11863 | 0 | { |
11864 | 0 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
11865 | 0 | stub_entry->root.string + 9, |
11866 | 0 | false, false); |
11867 | 0 | if (br_entry == NULL) |
11868 | 0 | { |
11869 | 0 | _bfd_error_handler (_("can't find branch stub `%s'"), |
11870 | 0 | stub_entry->root.string); |
11871 | 0 | htab->stub_error = true; |
11872 | 0 | return false; |
11873 | 0 | } |
11874 | | |
11875 | 0 | targ = (stub_entry->target_value |
11876 | 0 | + stub_entry->target_section->output_offset |
11877 | 0 | + stub_entry->target_section->output_section->vma); |
11878 | 0 | if (!stub_entry->type.r2save) |
11879 | 0 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
11880 | |
|
11881 | 0 | bfd_put_64 (htab->brlt->owner, targ, |
11882 | 0 | htab->brlt->contents + br_entry->offset); |
11883 | |
|
11884 | 0 | if (br_entry->iter == htab->stub_iteration) |
11885 | 0 | { |
11886 | 0 | br_entry->iter = 0; |
11887 | |
|
11888 | 0 | if (htab->relbrlt != NULL && !info->enable_dt_relr) |
11889 | 0 | { |
11890 | | /* Create a reloc for the branch lookup table entry. */ |
11891 | 0 | Elf_Internal_Rela rela; |
11892 | |
|
11893 | 0 | rela.r_offset = (br_entry->offset |
11894 | 0 | + htab->brlt->output_offset |
11895 | 0 | + htab->brlt->output_section->vma); |
11896 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
11897 | 0 | rela.r_addend = targ; |
11898 | |
|
11899 | 0 | BFD_ASSERT (count_and_swap_reloc_out (htab->relbrlt->owner, &rela, |
11900 | 0 | htab->relbrlt)); |
11901 | 0 | } |
11902 | 0 | else if (info->emitrelocations) |
11903 | 0 | { |
11904 | 0 | r = get_relocs (htab->brlt, 1); |
11905 | 0 | if (r == NULL) |
11906 | 0 | return false; |
11907 | | /* brlt, being SEC_LINKER_CREATED does not go through the |
11908 | | normal reloc processing. Symbols and offsets are not |
11909 | | translated from input file to output file form, so |
11910 | | set up the offset per the output file. */ |
11911 | 0 | r->r_offset = (br_entry->offset |
11912 | 0 | + htab->brlt->output_offset |
11913 | 0 | + htab->brlt->output_section->vma); |
11914 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
11915 | 0 | r->r_addend = targ; |
11916 | 0 | } |
11917 | 0 | } |
11918 | | |
11919 | 0 | targ = (br_entry->offset |
11920 | 0 | + htab->brlt->output_offset |
11921 | 0 | + htab->brlt->output_section->vma); |
11922 | |
|
11923 | 0 | off = (elf_gp (info->output_bfd) |
11924 | 0 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
11925 | 0 | off = targ - off; |
11926 | |
|
11927 | 0 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
11928 | 0 | { |
11929 | 0 | info->callbacks->einfo |
11930 | 0 | (_("%P: linkage table error against `%pT'\n"), |
11931 | 0 | stub_entry->root.string); |
11932 | 0 | bfd_set_error (bfd_error_bad_value); |
11933 | 0 | htab->stub_error = true; |
11934 | 0 | return false; |
11935 | 0 | } |
11936 | | |
11937 | 0 | if (info->emitrelocations) |
11938 | 0 | { |
11939 | 0 | r = get_relocs (stub_entry->group->stub_sec, 1 + (PPC_HA (off) != 0)); |
11940 | 0 | if (r == NULL) |
11941 | 0 | return false; |
11942 | 0 | r[0].r_offset = loc - stub_entry->group->stub_sec->contents; |
11943 | 0 | if (bfd_big_endian (info->output_bfd)) |
11944 | 0 | r[0].r_offset += 2; |
11945 | 0 | if (stub_entry->type.r2save) |
11946 | 0 | r[0].r_offset += 4; |
11947 | 0 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_DS); |
11948 | 0 | r[0].r_addend = targ; |
11949 | 0 | if (PPC_HA (off) != 0) |
11950 | 0 | { |
11951 | 0 | r[0].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_HA); |
11952 | 0 | r[1].r_offset = r[0].r_offset + 4; |
11953 | 0 | r[1].r_info = ELF64_R_INFO (0, R_PPC64_TOC16_LO_DS); |
11954 | 0 | r[1].r_addend = r[0].r_addend; |
11955 | 0 | } |
11956 | 0 | } |
11957 | | |
11958 | 0 | p = loc; |
11959 | 0 | obfd = htab->params->stub_bfd; |
11960 | 0 | if (!stub_entry->type.r2save) |
11961 | 0 | { |
11962 | 0 | if (PPC_HA (off) != 0) |
11963 | 0 | { |
11964 | 0 | bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (off), p); |
11965 | 0 | p += 4; |
11966 | 0 | bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (off), p); |
11967 | 0 | } |
11968 | 0 | else |
11969 | 0 | bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (off), p); |
11970 | 0 | } |
11971 | 0 | else |
11972 | 0 | { |
11973 | 0 | bfd_vma r2off = get_r2off (info, stub_entry); |
11974 | |
|
11975 | 0 | if (r2off == (bfd_vma) -1) |
11976 | 0 | { |
11977 | 0 | htab->stub_error = true; |
11978 | 0 | return false; |
11979 | 0 | } |
11980 | | |
11981 | 0 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p); |
11982 | 0 | p += 4; |
11983 | 0 | if (PPC_HA (off) != 0) |
11984 | 0 | { |
11985 | 0 | bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (off), p); |
11986 | 0 | p += 4; |
11987 | 0 | bfd_put_32 (obfd, LD_R12_0R12 | PPC_LO (off), p); |
11988 | 0 | } |
11989 | 0 | else |
11990 | 0 | bfd_put_32 (obfd, LD_R12_0R2 | PPC_LO (off), p); |
11991 | |
|
11992 | 0 | if (PPC_HA (r2off) != 0) |
11993 | 0 | { |
11994 | 0 | p += 4; |
11995 | 0 | bfd_put_32 (obfd, ADDIS_R2_R2 | PPC_HA (r2off), p); |
11996 | 0 | } |
11997 | 0 | if (PPC_LO (r2off) != 0) |
11998 | 0 | { |
11999 | 0 | p += 4; |
12000 | 0 | bfd_put_32 (obfd, ADDI_R2_R2 | PPC_LO (r2off), p); |
12001 | 0 | } |
12002 | 0 | } |
12003 | 0 | p += 4; |
12004 | 0 | bfd_put_32 (obfd, MTCTR_R12, p); |
12005 | 0 | p += 4; |
12006 | 0 | bfd_put_32 (obfd, BCTR, p); |
12007 | 0 | p += 4; |
12008 | 0 | } |
12009 | 0 | else if (stub_entry->type.sub >= ppc_stub_notoc) |
12010 | 0 | { |
12011 | 0 | bool is_plt = stub_entry->type.main == ppc_stub_plt_call; |
12012 | 0 | p = loc; |
12013 | 0 | off = (stub_entry->stub_offset |
12014 | 0 | + stub_entry->group->stub_sec->output_offset |
12015 | 0 | + stub_entry->group->stub_sec->output_section->vma); |
12016 | 0 | obfd = htab->params->stub_bfd; |
12017 | 0 | is_tga = (is_plt |
12018 | 0 | && stub_entry->h != NULL |
12019 | 0 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
12020 | 0 | && htab->params->tls_get_addr_opt); |
12021 | 0 | if (is_tga) |
12022 | 0 | { |
12023 | 0 | p = build_tls_get_addr_head (htab, stub_entry, p); |
12024 | 0 | off += p - loc; |
12025 | 0 | } |
12026 | 0 | if (stub_entry->type.r2save) |
12027 | 0 | { |
12028 | 0 | off += 4; |
12029 | 0 | bfd_put_32 (obfd, STD_R2_0R1 + STK_TOC (htab), p); |
12030 | 0 | p += 4; |
12031 | 0 | } |
12032 | 0 | if (is_plt) |
12033 | 0 | { |
12034 | 0 | targ = stub_entry->plt_ent->plt.offset & ~1; |
12035 | 0 | if (targ >= (bfd_vma) -2) |
12036 | 0 | abort (); |
12037 | | |
12038 | 0 | plt = htab->elf.splt; |
12039 | 0 | if (use_local_plt (info, elf_hash_entry (stub_entry->h))) |
12040 | 0 | { |
12041 | 0 | if (stub_entry->symtype == STT_GNU_IFUNC) |
12042 | 0 | plt = htab->elf.iplt; |
12043 | 0 | else |
12044 | 0 | plt = htab->pltlocal; |
12045 | 0 | } |
12046 | 0 | targ += plt->output_offset + plt->output_section->vma; |
12047 | 0 | } |
12048 | 0 | else |
12049 | 0 | targ = (stub_entry->target_value |
12050 | 0 | + stub_entry->target_section->output_offset |
12051 | 0 | + stub_entry->target_section->output_section->vma); |
12052 | 0 | odd = off & 4; |
12053 | 0 | off = targ - off; |
12054 | |
|
12055 | 0 | relp = p; |
12056 | 0 | num_rel = 0; |
12057 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
12058 | 0 | p = build_power10_offset (obfd, p, off, odd, is_plt); |
12059 | 0 | else |
12060 | 0 | { |
12061 | 0 | if (htab->glink_eh_frame != NULL |
12062 | 0 | && htab->glink_eh_frame->size != 0) |
12063 | 0 | { |
12064 | 0 | bfd_byte *base, *eh; |
12065 | 0 | unsigned int lr_used, delta; |
12066 | |
|
12067 | 0 | base = (htab->glink_eh_frame->contents |
12068 | 0 | + stub_entry->group->eh_base + 17); |
12069 | 0 | eh = base + stub_entry->group->eh_size; |
12070 | 0 | lr_used = stub_entry->stub_offset + (p - loc) + 8; |
12071 | 0 | delta = lr_used - stub_entry->group->lr_restore; |
12072 | 0 | stub_entry->group->lr_restore = lr_used + 8; |
12073 | 0 | eh = eh_advance (htab->elf.dynobj, eh, delta); |
12074 | 0 | *eh++ = DW_CFA_register; |
12075 | 0 | *eh++ = 65; |
12076 | 0 | *eh++ = 12; |
12077 | 0 | *eh++ = DW_CFA_advance_loc + 2; |
12078 | 0 | *eh++ = DW_CFA_restore_extended; |
12079 | 0 | *eh++ = 65; |
12080 | 0 | stub_entry->group->eh_size = eh - base; |
12081 | 0 | } |
12082 | | |
12083 | | /* The notoc stubs calculate their target (either a PLT entry or |
12084 | | the global entry point of a function) relative to the PC |
12085 | | returned by the "bcl" two instructions past the start of the |
12086 | | sequence emitted by build_offset. The offset is therefore 8 |
12087 | | less than calculated from the start of the sequence. */ |
12088 | 0 | off -= 8; |
12089 | 0 | p = build_offset (obfd, p, off, is_plt); |
12090 | 0 | } |
12091 | |
|
12092 | 0 | if (stub_entry->type.main == ppc_stub_long_branch) |
12093 | 0 | { |
12094 | 0 | bfd_vma from; |
12095 | 0 | num_rel = 1; |
12096 | 0 | from = (stub_entry->stub_offset |
12097 | 0 | + stub_entry->group->stub_sec->output_offset |
12098 | 0 | + stub_entry->group->stub_sec->output_section->vma |
12099 | 0 | + (p - loc)); |
12100 | 0 | bfd_put_32 (obfd, B_DOT | ((targ - from) & 0x3fffffc), p); |
12101 | 0 | } |
12102 | 0 | else |
12103 | 0 | { |
12104 | 0 | bfd_put_32 (obfd, MTCTR_R12, p); |
12105 | 0 | p += 4; |
12106 | 0 | bfd_put_32 (obfd, BCTR, p); |
12107 | 0 | } |
12108 | 0 | p += 4; |
12109 | |
|
12110 | 0 | if (is_tga) |
12111 | 0 | p = build_tls_get_addr_tail (htab, stub_entry, p, loc); |
12112 | |
|
12113 | 0 | if (info->emitrelocations) |
12114 | 0 | { |
12115 | 0 | bfd_vma roff = relp - stub_entry->group->stub_sec->contents; |
12116 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
12117 | 0 | num_rel += num_relocs_for_power10_offset (off, odd); |
12118 | 0 | else |
12119 | 0 | { |
12120 | 0 | num_rel += num_relocs_for_offset (off); |
12121 | 0 | roff += 16; |
12122 | 0 | } |
12123 | 0 | r = get_relocs (stub_entry->group->stub_sec, num_rel); |
12124 | 0 | if (r == NULL) |
12125 | 0 | return false; |
12126 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
12127 | 0 | r = emit_relocs_for_power10_offset (info, r, roff, targ, off, odd); |
12128 | 0 | else |
12129 | 0 | r = emit_relocs_for_offset (info, r, roff, targ, off); |
12130 | 0 | if (stub_entry->type.main == ppc_stub_long_branch) |
12131 | 0 | { |
12132 | 0 | ++r; |
12133 | 0 | roff = p - 4 - stub_entry->group->stub_sec->contents; |
12134 | 0 | r->r_offset = roff; |
12135 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL24); |
12136 | 0 | r->r_addend = targ; |
12137 | 0 | if (stub_entry->h != NULL |
12138 | 0 | && !use_global_in_relocs (htab, stub_entry, r, num_rel)) |
12139 | 0 | return false; |
12140 | 0 | } |
12141 | 0 | } |
12142 | 0 | } |
12143 | 0 | else if (stub_entry->type.main == ppc_stub_plt_call) |
12144 | 0 | { |
12145 | 0 | if (stub_entry->h != NULL |
12146 | 0 | && stub_entry->h->is_func_descriptor |
12147 | 0 | && stub_entry->h->oh != NULL) |
12148 | 0 | { |
12149 | 0 | struct ppc_link_hash_entry *fh = ppc_follow_link (stub_entry->h->oh); |
12150 | | |
12151 | | /* If the old-ABI "dot-symbol" is undefined make it weak so |
12152 | | we don't get a link error from RELOC_FOR_GLOBAL_SYMBOL. */ |
12153 | 0 | if (fh->elf.root.type == bfd_link_hash_undefined |
12154 | 0 | && (stub_entry->h->elf.root.type == bfd_link_hash_defined |
12155 | 0 | || stub_entry->h->elf.root.type == bfd_link_hash_defweak)) |
12156 | 0 | fh->elf.root.type = bfd_link_hash_undefweak; |
12157 | 0 | } |
12158 | | |
12159 | | /* Now build the stub. */ |
12160 | 0 | targ = stub_entry->plt_ent->plt.offset & ~1; |
12161 | 0 | if (targ >= (bfd_vma) -2) |
12162 | 0 | abort (); |
12163 | | |
12164 | 0 | plt = htab->elf.splt; |
12165 | 0 | if (use_local_plt (info, elf_hash_entry (stub_entry->h))) |
12166 | 0 | { |
12167 | 0 | if (stub_entry->symtype == STT_GNU_IFUNC) |
12168 | 0 | plt = htab->elf.iplt; |
12169 | 0 | else |
12170 | 0 | plt = htab->pltlocal; |
12171 | 0 | } |
12172 | 0 | targ += plt->output_offset + plt->output_section->vma; |
12173 | |
|
12174 | 0 | off = (elf_gp (info->output_bfd) |
12175 | 0 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
12176 | 0 | off = targ - off; |
12177 | |
|
12178 | 0 | if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
12179 | 0 | { |
12180 | 0 | info->callbacks->einfo |
12181 | | /* xgettext:c-format */ |
12182 | 0 | (_("%P: linkage table error against `%pT'\n"), |
12183 | 0 | stub_entry->h != NULL |
12184 | 0 | ? stub_entry->h->elf.root.root.string |
12185 | 0 | : "<local sym>"); |
12186 | 0 | bfd_set_error (bfd_error_bad_value); |
12187 | 0 | htab->stub_error = true; |
12188 | 0 | return false; |
12189 | 0 | } |
12190 | | |
12191 | 0 | r = NULL; |
12192 | 0 | if (info->emitrelocations) |
12193 | 0 | { |
12194 | 0 | r = get_relocs (stub_entry->group->stub_sec, |
12195 | 0 | ((PPC_HA (off) != 0) |
12196 | 0 | + (htab->opd_abi |
12197 | 0 | ? 2 + (htab->params->plt_static_chain |
12198 | 0 | && PPC_HA (off + 16) == PPC_HA (off)) |
12199 | 0 | : 1))); |
12200 | 0 | if (r == NULL) |
12201 | 0 | return false; |
12202 | 0 | r[0].r_offset = loc - stub_entry->group->stub_sec->contents; |
12203 | 0 | if (bfd_big_endian (info->output_bfd)) |
12204 | 0 | r[0].r_offset += 2; |
12205 | 0 | r[0].r_addend = targ; |
12206 | 0 | } |
12207 | 0 | p = loc; |
12208 | 0 | obfd = htab->params->stub_bfd; |
12209 | 0 | is_tga = (stub_entry->h != NULL |
12210 | 0 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
12211 | 0 | && htab->params->tls_get_addr_opt); |
12212 | 0 | if (is_tga) |
12213 | 0 | { |
12214 | 0 | p = build_tls_get_addr_head (htab, stub_entry, p); |
12215 | 0 | if (r != NULL) |
12216 | 0 | r[0].r_offset += p - loc; |
12217 | 0 | } |
12218 | 0 | p = build_plt_stub (htab, stub_entry, p, off, r); |
12219 | 0 | if (is_tga) |
12220 | 0 | p = build_tls_get_addr_tail (htab, stub_entry, p, loc); |
12221 | 0 | } |
12222 | 0 | else if (stub_entry->type.main == ppc_stub_save_res) |
12223 | 0 | return true; |
12224 | 0 | else |
12225 | 0 | { |
12226 | 0 | BFD_FAIL (); |
12227 | 0 | return false; |
12228 | 0 | } |
12229 | | |
12230 | 0 | stub_entry->group->stub_sec->size = stub_entry->stub_offset + (p - loc); |
12231 | |
|
12232 | 0 | if (htab->params->emit_stub_syms) |
12233 | 0 | { |
12234 | 0 | struct elf_link_hash_entry *h; |
12235 | 0 | size_t len1, len2; |
12236 | 0 | char *name; |
12237 | 0 | const char *const stub_str[] = { "long_branch", |
12238 | 0 | "plt_branch", |
12239 | 0 | "plt_call" }; |
12240 | |
|
12241 | 0 | len1 = strlen (stub_str[stub_entry->type.main - 1]); |
12242 | 0 | len2 = strlen (stub_entry->root.string); |
12243 | 0 | name = bfd_alloc (info->output_bfd, len1 + len2 + 2); |
12244 | 0 | if (name == NULL) |
12245 | 0 | return false; |
12246 | 0 | memcpy (name, stub_entry->root.string, 9); |
12247 | 0 | memcpy (name + 9, stub_str[stub_entry->type.main - 1], len1); |
12248 | 0 | memcpy (name + len1 + 9, stub_entry->root.string + 8, len2 - 8 + 1); |
12249 | 0 | h = elf_link_hash_lookup (&htab->elf, name, true, false, false); |
12250 | 0 | if (h == NULL) |
12251 | 0 | return false; |
12252 | 0 | if (h->root.type == bfd_link_hash_new) |
12253 | 0 | { |
12254 | 0 | h->root.type = bfd_link_hash_defined; |
12255 | 0 | h->root.u.def.section = stub_entry->group->stub_sec; |
12256 | 0 | h->root.u.def.value = stub_entry->stub_offset; |
12257 | 0 | h->ref_regular = 1; |
12258 | 0 | h->def_regular = 1; |
12259 | 0 | h->ref_regular_nonweak = 1; |
12260 | 0 | h->forced_local = 1; |
12261 | 0 | h->non_elf = 0; |
12262 | 0 | h->root.linker_def = 1; |
12263 | 0 | } |
12264 | 0 | } |
12265 | | |
12266 | 0 | return true; |
12267 | 0 | } |
12268 | | |
12269 | | /* As above, but don't actually build the stub. Just bump offset so |
12270 | | we know stub section sizes, and select plt_branch stubs where |
12271 | | long_branch stubs won't do. */ |
12272 | | |
12273 | | static bool |
12274 | | ppc_size_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg) |
12275 | 0 | { |
12276 | 0 | struct ppc_stub_hash_entry *stub_entry; |
12277 | 0 | struct bfd_link_info *info; |
12278 | 0 | struct ppc_link_hash_table *htab; |
12279 | 0 | asection *plt; |
12280 | 0 | bfd_vma targ, off, r2off; |
12281 | 0 | unsigned int size, pad, extra, lr_used, delta, odd; |
12282 | 0 | bfd_vma stub_offset; |
12283 | | |
12284 | | /* Massage our args to the form they really have. */ |
12285 | 0 | stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
12286 | 0 | info = in_arg; |
12287 | |
|
12288 | 0 | htab = ppc_hash_table (info); |
12289 | 0 | if (htab == NULL) |
12290 | 0 | return false; |
12291 | | |
12292 | | /* Fail if the target section could not be assigned to an output |
12293 | | section. The user should fix his linker script. */ |
12294 | 0 | if (stub_entry->target_section != NULL |
12295 | 0 | && stub_entry->target_section->output_section == NULL |
12296 | 0 | && info->non_contiguous_regions) |
12297 | 0 | info->callbacks->fatal (_("%P: Could not assign `%pA' to an output section. " |
12298 | 0 | "Retry without --enable-non-contiguous-regions.\n"), |
12299 | 0 | stub_entry->target_section); |
12300 | | |
12301 | | /* Same for the group. */ |
12302 | 0 | if (stub_entry->group->stub_sec != NULL |
12303 | 0 | && stub_entry->group->stub_sec->output_section == NULL |
12304 | 0 | && info->non_contiguous_regions) |
12305 | 0 | info->callbacks->fatal (_("%P: Could not assign `%pA' to an output section. " |
12306 | 0 | "Retry without --enable-non-contiguous-regions.\n"), |
12307 | 0 | stub_entry->group->stub_sec); |
12308 | | |
12309 | | /* Make a note of the offset within the stubs for this entry. */ |
12310 | 0 | stub_offset = stub_entry->group->stub_sec->size; |
12311 | 0 | if (htab->stub_iteration > STUB_SHRINK_ITER |
12312 | 0 | && stub_entry->stub_offset > stub_offset) |
12313 | 0 | stub_offset = stub_entry->stub_offset; |
12314 | 0 | stub_entry->id = ++htab->stub_id; |
12315 | |
|
12316 | 0 | if (stub_entry->h != NULL |
12317 | 0 | && stub_entry->h->save_res |
12318 | 0 | && stub_entry->h->elf.root.type == bfd_link_hash_defined |
12319 | 0 | && stub_entry->h->elf.root.u.def.section == htab->sfpr) |
12320 | 0 | { |
12321 | | /* Don't make stubs to out-of-line register save/restore |
12322 | | functions. Instead, emit copies of the functions. */ |
12323 | 0 | stub_entry->group->needs_save_res = 1; |
12324 | 0 | stub_entry->type.main = ppc_stub_save_res; |
12325 | 0 | stub_entry->type.sub = ppc_stub_toc; |
12326 | 0 | stub_entry->type.r2save = 0; |
12327 | 0 | return true; |
12328 | 0 | } |
12329 | | |
12330 | 0 | if (stub_entry->type.main == ppc_stub_plt_branch) |
12331 | 0 | { |
12332 | | /* Reset the stub type from the plt branch variant in case we now |
12333 | | can reach with a shorter stub. */ |
12334 | 0 | stub_entry->type.main = ppc_stub_long_branch; |
12335 | 0 | } |
12336 | |
|
12337 | 0 | if (stub_entry->type.main == ppc_stub_long_branch |
12338 | 0 | && stub_entry->type.sub == ppc_stub_toc) |
12339 | 0 | { |
12340 | 0 | targ = (stub_entry->target_value |
12341 | 0 | + stub_entry->target_section->output_offset |
12342 | 0 | + stub_entry->target_section->output_section->vma); |
12343 | 0 | targ += PPC64_LOCAL_ENTRY_OFFSET (stub_entry->other); |
12344 | 0 | off = (stub_offset |
12345 | 0 | + stub_entry->group->stub_sec->output_offset |
12346 | 0 | + stub_entry->group->stub_sec->output_section->vma); |
12347 | |
|
12348 | 0 | size = 4; |
12349 | 0 | r2off = 0; |
12350 | 0 | if (stub_entry->type.r2save) |
12351 | 0 | { |
12352 | 0 | r2off = get_r2off (info, stub_entry); |
12353 | 0 | if (r2off == (bfd_vma) -1) |
12354 | 0 | { |
12355 | 0 | htab->stub_error = true; |
12356 | 0 | return false; |
12357 | 0 | } |
12358 | 0 | size = 8; |
12359 | 0 | if (PPC_HA (r2off) != 0) |
12360 | 0 | size += 4; |
12361 | 0 | if (PPC_LO (r2off) != 0) |
12362 | 0 | size += 4; |
12363 | 0 | off += size - 4; |
12364 | 0 | } |
12365 | 0 | off = targ - off; |
12366 | | |
12367 | | /* If the branch offset is too big, use a ppc_stub_plt_branch. |
12368 | | Do the same for -R objects without function descriptors. */ |
12369 | 0 | if ((stub_entry->type.r2save |
12370 | 0 | && r2off == 0 |
12371 | 0 | && htab->sec_info[stub_entry->target_section->id].toc_off == 0) |
12372 | 0 | || off + (1 << 25) >= (bfd_vma) (1 << 26)) |
12373 | 0 | { |
12374 | 0 | struct ppc_branch_hash_entry *br_entry; |
12375 | |
|
12376 | 0 | br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
12377 | 0 | stub_entry->root.string + 9, |
12378 | 0 | true, false); |
12379 | 0 | if (br_entry == NULL) |
12380 | 0 | { |
12381 | 0 | _bfd_error_handler (_("can't build branch stub `%s'"), |
12382 | 0 | stub_entry->root.string); |
12383 | 0 | htab->stub_error = true; |
12384 | 0 | return false; |
12385 | 0 | } |
12386 | | |
12387 | 0 | if (br_entry->iter != htab->stub_iteration) |
12388 | 0 | { |
12389 | 0 | br_entry->iter = htab->stub_iteration; |
12390 | 0 | br_entry->offset = htab->brlt->size; |
12391 | 0 | htab->brlt->size += 8; |
12392 | |
|
12393 | 0 | if (htab->relbrlt != NULL && !info->enable_dt_relr) |
12394 | 0 | htab->relbrlt->size += sizeof (Elf64_External_Rela); |
12395 | 0 | else if (info->emitrelocations) |
12396 | 0 | { |
12397 | 0 | htab->brlt->reloc_count += 1; |
12398 | 0 | htab->brlt->flags |= SEC_RELOC; |
12399 | 0 | } |
12400 | 0 | } |
12401 | |
|
12402 | 0 | targ = (br_entry->offset |
12403 | 0 | + htab->brlt->output_offset |
12404 | 0 | + htab->brlt->output_section->vma); |
12405 | 0 | off = (elf_gp (info->output_bfd) |
12406 | 0 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
12407 | 0 | off = targ - off; |
12408 | |
|
12409 | 0 | if (info->emitrelocations) |
12410 | 0 | { |
12411 | 0 | stub_entry->group->stub_sec->reloc_count |
12412 | 0 | += 1 + (PPC_HA (off) != 0); |
12413 | 0 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
12414 | 0 | } |
12415 | |
|
12416 | 0 | stub_entry->type.main = ppc_stub_plt_branch; |
12417 | 0 | if (!stub_entry->type.r2save) |
12418 | 0 | { |
12419 | 0 | size = 12; |
12420 | 0 | if (PPC_HA (off) != 0) |
12421 | 0 | size = 16; |
12422 | 0 | } |
12423 | 0 | else |
12424 | 0 | { |
12425 | 0 | size = 16; |
12426 | 0 | if (PPC_HA (off) != 0) |
12427 | 0 | size += 4; |
12428 | |
|
12429 | 0 | if (PPC_HA (r2off) != 0) |
12430 | 0 | size += 4; |
12431 | 0 | if (PPC_LO (r2off) != 0) |
12432 | 0 | size += 4; |
12433 | 0 | } |
12434 | 0 | pad = plt_stub_pad (htab->params->plt_stub_align, stub_offset, size); |
12435 | 0 | stub_offset += pad; |
12436 | 0 | } |
12437 | 0 | else if (info->emitrelocations) |
12438 | 0 | { |
12439 | 0 | stub_entry->group->stub_sec->reloc_count += 1; |
12440 | 0 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
12441 | 0 | } |
12442 | 0 | } |
12443 | 0 | else if (stub_entry->type.main == ppc_stub_long_branch) |
12444 | 0 | { |
12445 | 0 | off = (stub_offset |
12446 | 0 | + stub_entry->group->stub_sec->output_offset |
12447 | 0 | + stub_entry->group->stub_sec->output_section->vma); |
12448 | 0 | size = 0; |
12449 | 0 | if (stub_entry->type.r2save) |
12450 | 0 | size = 4; |
12451 | 0 | off += size; |
12452 | 0 | targ = (stub_entry->target_value |
12453 | 0 | + stub_entry->target_section->output_offset |
12454 | 0 | + stub_entry->target_section->output_section->vma); |
12455 | 0 | odd = off & 4; |
12456 | 0 | off = targ - off; |
12457 | |
|
12458 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
12459 | 0 | extra = size_power10_offset (off, odd); |
12460 | 0 | else |
12461 | 0 | extra = size_offset (off - 8); |
12462 | | /* Include branch insn plus those in the offset sequence. */ |
12463 | 0 | size += 4 + extra; |
12464 | | |
12465 | | /* If the branch can't reach, use a plt_branch. |
12466 | | The branch insn is at the end, or "extra" bytes along. So |
12467 | | its offset will be "extra" bytes less that that already |
12468 | | calculated. */ |
12469 | 0 | if (off - extra + (1 << 25) >= (bfd_vma) (1 << 26)) |
12470 | 0 | { |
12471 | 0 | stub_entry->type.main = ppc_stub_plt_branch; |
12472 | 0 | size += 4; |
12473 | 0 | pad = plt_stub_pad (htab->params->plt_stub_align, stub_offset, size); |
12474 | 0 | if (pad != 0) |
12475 | 0 | { |
12476 | 0 | stub_offset += pad; |
12477 | 0 | off -= pad; |
12478 | 0 | odd ^= pad & 4; |
12479 | 0 | size -= extra; |
12480 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
12481 | 0 | extra = size_power10_offset (off, odd); |
12482 | 0 | else |
12483 | 0 | extra = size_offset (off - 8); |
12484 | 0 | size += extra; |
12485 | 0 | } |
12486 | 0 | } |
12487 | 0 | else if (info->emitrelocations) |
12488 | 0 | stub_entry->group->stub_sec->reloc_count +=1; |
12489 | |
|
12490 | 0 | if (info->emitrelocations) |
12491 | 0 | { |
12492 | 0 | unsigned int num_rel; |
12493 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
12494 | 0 | num_rel = num_relocs_for_power10_offset (off, odd); |
12495 | 0 | else |
12496 | 0 | num_rel = num_relocs_for_offset (off - 8); |
12497 | 0 | stub_entry->group->stub_sec->reloc_count += num_rel; |
12498 | 0 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
12499 | 0 | } |
12500 | |
|
12501 | 0 | if (stub_entry->type.sub != ppc_stub_notoc) |
12502 | 0 | { |
12503 | | /* After the bcl, lr has been modified so we need to emit |
12504 | | .eh_frame info saying the return address is in r12. */ |
12505 | 0 | lr_used = stub_offset + 8; |
12506 | 0 | if (stub_entry->type.r2save) |
12507 | 0 | lr_used += 4; |
12508 | | /* The eh_frame info will consist of a DW_CFA_advance_loc or |
12509 | | variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2, |
12510 | | DW_CFA_restore_extended 65. */ |
12511 | 0 | delta = lr_used - stub_entry->group->lr_restore; |
12512 | 0 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; |
12513 | 0 | stub_entry->group->lr_restore = lr_used + 8; |
12514 | 0 | } |
12515 | 0 | } |
12516 | 0 | else if (stub_entry->type.sub >= ppc_stub_notoc) |
12517 | 0 | { |
12518 | 0 | BFD_ASSERT (stub_entry->type.main == ppc_stub_plt_call); |
12519 | 0 | lr_used = 0; |
12520 | 0 | if (stub_entry->h != NULL |
12521 | 0 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
12522 | 0 | && htab->params->tls_get_addr_opt) |
12523 | 0 | { |
12524 | 0 | lr_used += 7 * 4; |
12525 | 0 | if (!htab->params->no_tls_get_addr_regsave) |
12526 | 0 | lr_used += 11 * 4; |
12527 | 0 | else if (stub_entry->type.r2save) |
12528 | 0 | lr_used += 2 * 4; |
12529 | 0 | } |
12530 | 0 | if (stub_entry->type.r2save) |
12531 | 0 | lr_used += 4; |
12532 | 0 | targ = stub_entry->plt_ent->plt.offset & ~1; |
12533 | 0 | if (targ >= (bfd_vma) -2) |
12534 | 0 | abort (); |
12535 | | |
12536 | 0 | plt = htab->elf.splt; |
12537 | 0 | if (use_local_plt (info, elf_hash_entry (stub_entry->h))) |
12538 | 0 | { |
12539 | 0 | if (stub_entry->symtype == STT_GNU_IFUNC) |
12540 | 0 | plt = htab->elf.iplt; |
12541 | 0 | else |
12542 | 0 | plt = htab->pltlocal; |
12543 | 0 | } |
12544 | 0 | targ += plt->output_offset + plt->output_section->vma; |
12545 | 0 | off = (stub_offset |
12546 | 0 | + stub_entry->group->stub_sec->output_offset |
12547 | 0 | + stub_entry->group->stub_sec->output_section->vma |
12548 | 0 | + lr_used); |
12549 | 0 | odd = off & 4; |
12550 | 0 | off = targ - off; |
12551 | |
|
12552 | 0 | size = plt_stub_size (htab, stub_entry, off, odd); |
12553 | 0 | pad = plt_stub_pad (htab->params->plt_stub_align, stub_offset, size); |
12554 | 0 | if (pad != 0) |
12555 | 0 | { |
12556 | 0 | stub_offset += pad; |
12557 | 0 | off -= pad; |
12558 | 0 | odd ^= pad & 4; |
12559 | 0 | size = plt_stub_size (htab, stub_entry, off, odd); |
12560 | 0 | } |
12561 | |
|
12562 | 0 | if (info->emitrelocations) |
12563 | 0 | { |
12564 | 0 | unsigned int num_rel; |
12565 | 0 | if (stub_entry->type.sub == ppc_stub_notoc) |
12566 | 0 | num_rel = num_relocs_for_power10_offset (off, odd); |
12567 | 0 | else |
12568 | 0 | num_rel = num_relocs_for_offset (off - 8); |
12569 | 0 | stub_entry->group->stub_sec->reloc_count += num_rel; |
12570 | 0 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
12571 | 0 | } |
12572 | |
|
12573 | 0 | if (stub_entry->type.sub != ppc_stub_notoc) |
12574 | 0 | { |
12575 | | /* After the bcl, lr has been modified so we need to emit |
12576 | | .eh_frame info saying the return address is in r12. */ |
12577 | 0 | lr_used += stub_offset + 8; |
12578 | | /* The eh_frame info will consist of a DW_CFA_advance_loc or |
12579 | | variant, DW_CFA_register, 65, 12, DW_CFA_advance_loc+2, |
12580 | | DW_CFA_restore_extended 65. */ |
12581 | 0 | delta = lr_used - stub_entry->group->lr_restore; |
12582 | 0 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; |
12583 | 0 | stub_entry->group->lr_restore = lr_used + 8; |
12584 | 0 | } |
12585 | 0 | if (stub_entry->h != NULL |
12586 | 0 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
12587 | 0 | && htab->params->tls_get_addr_opt) |
12588 | 0 | { |
12589 | 0 | if (!htab->params->no_tls_get_addr_regsave) |
12590 | 0 | { |
12591 | 0 | unsigned int cfa_updt = stub_offset + 18 * 4; |
12592 | 0 | delta = cfa_updt - stub_entry->group->lr_restore; |
12593 | 0 | stub_entry->group->eh_size += eh_advance_size (delta); |
12594 | 0 | stub_entry->group->eh_size += htab->opd_abi ? 36 : 35; |
12595 | 0 | stub_entry->group->lr_restore = stub_offset + size - 4; |
12596 | 0 | } |
12597 | 0 | else if (stub_entry->type.r2save) |
12598 | 0 | { |
12599 | 0 | lr_used = stub_offset + size - 20; |
12600 | 0 | delta = lr_used - stub_entry->group->lr_restore; |
12601 | 0 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; |
12602 | 0 | stub_entry->group->lr_restore = stub_offset + size - 4; |
12603 | 0 | } |
12604 | 0 | } |
12605 | 0 | } |
12606 | 0 | else if (stub_entry->type.main == ppc_stub_plt_call) |
12607 | 0 | { |
12608 | 0 | targ = stub_entry->plt_ent->plt.offset & ~(bfd_vma) 1; |
12609 | 0 | if (targ >= (bfd_vma) -2) |
12610 | 0 | abort (); |
12611 | 0 | plt = htab->elf.splt; |
12612 | 0 | if (use_local_plt (info, elf_hash_entry (stub_entry->h))) |
12613 | 0 | { |
12614 | 0 | if (stub_entry->symtype == STT_GNU_IFUNC) |
12615 | 0 | plt = htab->elf.iplt; |
12616 | 0 | else |
12617 | 0 | plt = htab->pltlocal; |
12618 | 0 | } |
12619 | 0 | targ += plt->output_offset + plt->output_section->vma; |
12620 | |
|
12621 | 0 | off = (elf_gp (info->output_bfd) |
12622 | 0 | + htab->sec_info[stub_entry->group->link_sec->id].toc_off); |
12623 | 0 | off = targ - off; |
12624 | |
|
12625 | 0 | size = plt_stub_size (htab, stub_entry, off, 0); |
12626 | 0 | pad = plt_stub_pad (htab->params->plt_stub_align, stub_offset, size); |
12627 | 0 | stub_offset += pad; |
12628 | |
|
12629 | 0 | if (info->emitrelocations) |
12630 | 0 | { |
12631 | 0 | stub_entry->group->stub_sec->reloc_count |
12632 | 0 | += ((PPC_HA (off) != 0) |
12633 | 0 | + (htab->opd_abi |
12634 | 0 | ? 2 + (htab->params->plt_static_chain |
12635 | 0 | && PPC_HA (off + 16) == PPC_HA (off)) |
12636 | 0 | : 1)); |
12637 | 0 | stub_entry->group->stub_sec->flags |= SEC_RELOC; |
12638 | 0 | } |
12639 | |
|
12640 | 0 | if (stub_entry->h != NULL |
12641 | 0 | && is_tls_get_addr (&stub_entry->h->elf, htab) |
12642 | 0 | && htab->params->tls_get_addr_opt |
12643 | 0 | && stub_entry->type.r2save) |
12644 | 0 | { |
12645 | 0 | if (!htab->params->no_tls_get_addr_regsave) |
12646 | 0 | { |
12647 | | /* Adjustments to r1 need to be described. */ |
12648 | 0 | unsigned int cfa_updt = stub_offset + 18 * 4; |
12649 | 0 | delta = cfa_updt - stub_entry->group->lr_restore; |
12650 | 0 | stub_entry->group->eh_size += eh_advance_size (delta); |
12651 | 0 | stub_entry->group->eh_size += htab->opd_abi ? 36 : 35; |
12652 | 0 | } |
12653 | 0 | else |
12654 | 0 | { |
12655 | 0 | lr_used = stub_offset + size - 20; |
12656 | | /* The eh_frame info will consist of a DW_CFA_advance_loc |
12657 | | or variant, DW_CFA_offset_externed_sf, 65, -stackoff, |
12658 | | DW_CFA_advance_loc+4, DW_CFA_restore_extended, 65. */ |
12659 | 0 | delta = lr_used - stub_entry->group->lr_restore; |
12660 | 0 | stub_entry->group->eh_size += eh_advance_size (delta) + 6; |
12661 | 0 | } |
12662 | 0 | stub_entry->group->lr_restore = stub_offset + size - 4; |
12663 | 0 | } |
12664 | 0 | } |
12665 | 0 | else |
12666 | 0 | { |
12667 | 0 | BFD_FAIL (); |
12668 | 0 | return false; |
12669 | 0 | } |
12670 | | |
12671 | 0 | if (stub_entry->stub_offset != stub_offset) |
12672 | 0 | htab->stub_changed = true; |
12673 | 0 | stub_entry->stub_offset = stub_offset; |
12674 | 0 | stub_entry->group->stub_sec->size = stub_offset + size; |
12675 | 0 | return true; |
12676 | 0 | } |
12677 | | |
12678 | | /* Set up various things so that we can make a list of input sections |
12679 | | for each output section included in the link. Returns -1 on error, |
12680 | | 0 when no stubs will be needed, and 1 on success. */ |
12681 | | |
12682 | | int |
12683 | | ppc64_elf_setup_section_lists (struct bfd_link_info *info) |
12684 | 0 | { |
12685 | 0 | unsigned int id; |
12686 | 0 | size_t amt; |
12687 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
12688 | |
|
12689 | 0 | if (htab == NULL) |
12690 | 0 | return -1; |
12691 | | |
12692 | | /* The access to _bfd_section_id here is unlocked, so for the time |
12693 | | being this function cannot be called in multi-threaded mode. */ |
12694 | 0 | BFD_ASSERT (!_bfd_threading_enabled ()); |
12695 | |
|
12696 | 0 | htab->sec_info_arr_size = _bfd_section_id; |
12697 | 0 | amt = sizeof (*htab->sec_info) * (htab->sec_info_arr_size); |
12698 | 0 | htab->sec_info = bfd_zalloc (info->output_bfd, amt); |
12699 | 0 | if (htab->sec_info == NULL) |
12700 | 0 | return -1; |
12701 | | |
12702 | | /* Set toc_off for com, und, abs and ind sections. */ |
12703 | 0 | for (id = 0; id < 3; id++) |
12704 | 0 | htab->sec_info[id].toc_off = TOC_BASE_OFF; |
12705 | |
|
12706 | 0 | return 1; |
12707 | 0 | } |
12708 | | |
12709 | | /* Set up for first pass at multitoc partitioning. */ |
12710 | | |
12711 | | void |
12712 | | ppc64_elf_start_multitoc_partition (struct bfd_link_info *info) |
12713 | 0 | { |
12714 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
12715 | |
|
12716 | 0 | htab->toc_curr = ppc64_elf_set_toc (info, info->output_bfd); |
12717 | 0 | htab->toc_bfd = NULL; |
12718 | 0 | htab->toc_first_sec = NULL; |
12719 | 0 | } |
12720 | | |
12721 | | /* The linker repeatedly calls this function for each TOC input section |
12722 | | and linker generated GOT section. Group input bfds such that the toc |
12723 | | within a group is less than 64k in size. */ |
12724 | | |
12725 | | bool |
12726 | | ppc64_elf_next_toc_section (struct bfd_link_info *info, asection *isec) |
12727 | 0 | { |
12728 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
12729 | 0 | bfd_vma addr, off, limit; |
12730 | |
|
12731 | 0 | if (htab == NULL) |
12732 | 0 | return false; |
12733 | | |
12734 | 0 | if (!htab->second_toc_pass) |
12735 | 0 | { |
12736 | | /* Keep track of the first .toc or .got section for this input bfd. */ |
12737 | 0 | bool new_bfd = htab->toc_bfd != isec->owner; |
12738 | |
|
12739 | 0 | if (new_bfd) |
12740 | 0 | { |
12741 | 0 | htab->toc_bfd = isec->owner; |
12742 | 0 | htab->toc_first_sec = isec; |
12743 | 0 | } |
12744 | |
|
12745 | 0 | addr = isec->output_offset + isec->output_section->vma; |
12746 | 0 | off = addr - htab->toc_curr; |
12747 | 0 | limit = 0x80008000; |
12748 | 0 | if (ppc64_elf_tdata (isec->owner)->has_small_toc_reloc) |
12749 | 0 | limit = 0x10000; |
12750 | 0 | if (off + isec->size > limit) |
12751 | 0 | { |
12752 | 0 | addr = (htab->toc_first_sec->output_offset |
12753 | 0 | + htab->toc_first_sec->output_section->vma); |
12754 | 0 | htab->toc_curr = addr; |
12755 | 0 | htab->toc_curr &= -TOC_BASE_ALIGN; |
12756 | 0 | } |
12757 | | |
12758 | | /* toc_curr is the base address of this toc group. Set elf_gp |
12759 | | for the input section to be the offset relative to the |
12760 | | output toc base plus 0x8000. Making the input elf_gp an |
12761 | | offset allows us to move the toc as a whole without |
12762 | | recalculating input elf_gp. */ |
12763 | 0 | off = htab->toc_curr - elf_gp (info->output_bfd); |
12764 | 0 | off += TOC_BASE_OFF; |
12765 | | |
12766 | | /* Die if someone uses a linker script that doesn't keep input |
12767 | | file .toc and .got together. */ |
12768 | 0 | if (new_bfd |
12769 | 0 | && elf_gp (isec->owner) != 0 |
12770 | 0 | && elf_gp (isec->owner) != off) |
12771 | 0 | return false; |
12772 | | |
12773 | 0 | elf_gp (isec->owner) = off; |
12774 | 0 | return true; |
12775 | 0 | } |
12776 | | |
12777 | | /* During the second pass toc_first_sec points to the start of |
12778 | | a toc group, and toc_curr is used to track the old elf_gp. |
12779 | | We use toc_bfd to ensure we only look at each bfd once. */ |
12780 | 0 | if (htab->toc_bfd == isec->owner) |
12781 | 0 | return true; |
12782 | 0 | htab->toc_bfd = isec->owner; |
12783 | |
|
12784 | 0 | if (htab->toc_first_sec == NULL |
12785 | 0 | || htab->toc_curr != elf_gp (isec->owner)) |
12786 | 0 | { |
12787 | 0 | htab->toc_curr = elf_gp (isec->owner); |
12788 | 0 | htab->toc_first_sec = isec; |
12789 | 0 | } |
12790 | 0 | addr = (htab->toc_first_sec->output_offset |
12791 | 0 | + htab->toc_first_sec->output_section->vma); |
12792 | 0 | off = addr - elf_gp (info->output_bfd) + TOC_BASE_OFF; |
12793 | 0 | elf_gp (isec->owner) = off; |
12794 | |
|
12795 | 0 | return true; |
12796 | 0 | } |
12797 | | |
12798 | | /* Called via elf_link_hash_traverse to merge GOT entries for global |
12799 | | symbol H. */ |
12800 | | |
12801 | | static bool |
12802 | | merge_global_got (struct elf_link_hash_entry *h, void *inf ATTRIBUTE_UNUSED) |
12803 | 0 | { |
12804 | 0 | if (h->root.type == bfd_link_hash_indirect) |
12805 | 0 | return true; |
12806 | | |
12807 | 0 | merge_got_entries (&h->got.glist); |
12808 | |
|
12809 | 0 | return true; |
12810 | 0 | } |
12811 | | |
12812 | | /* Called via elf_link_hash_traverse to allocate GOT entries for global |
12813 | | symbol H. */ |
12814 | | |
12815 | | static bool |
12816 | | reallocate_got (struct elf_link_hash_entry *h, void *inf) |
12817 | 0 | { |
12818 | 0 | struct got_entry *gent; |
12819 | |
|
12820 | 0 | if (h->root.type == bfd_link_hash_indirect) |
12821 | 0 | return true; |
12822 | | |
12823 | 0 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
12824 | 0 | if (!gent->is_indirect) |
12825 | 0 | allocate_got (h, (struct bfd_link_info *) inf, gent); |
12826 | 0 | return true; |
12827 | 0 | } |
12828 | | |
12829 | | /* Called on the first multitoc pass after the last call to |
12830 | | ppc64_elf_next_toc_section. This function removes duplicate GOT |
12831 | | entries. */ |
12832 | | |
12833 | | bool |
12834 | | ppc64_elf_layout_multitoc (struct bfd_link_info *info) |
12835 | 0 | { |
12836 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
12837 | 0 | struct bfd *ibfd, *ibfd2; |
12838 | 0 | bool done_something; |
12839 | |
|
12840 | 0 | htab->multi_toc_needed = htab->toc_curr != elf_gp (info->output_bfd); |
12841 | |
|
12842 | 0 | if (!htab->do_multi_toc) |
12843 | 0 | return false; |
12844 | | |
12845 | | /* Merge global sym got entries within a toc group. */ |
12846 | 0 | elf_link_hash_traverse (&htab->elf, merge_global_got, info); |
12847 | | |
12848 | | /* And tlsld_got. */ |
12849 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
12850 | 0 | { |
12851 | 0 | struct got_entry *ent, *ent2; |
12852 | |
|
12853 | 0 | if (!is_ppc64_elf (ibfd)) |
12854 | 0 | continue; |
12855 | | |
12856 | 0 | ent = ppc64_tlsld_got (ibfd); |
12857 | 0 | if (!ent->is_indirect |
12858 | 0 | && ent->got.offset != (bfd_vma) -1) |
12859 | 0 | { |
12860 | 0 | for (ibfd2 = ibfd->link.next; ibfd2 != NULL; ibfd2 = ibfd2->link.next) |
12861 | 0 | { |
12862 | 0 | if (!is_ppc64_elf (ibfd2)) |
12863 | 0 | continue; |
12864 | | |
12865 | 0 | ent2 = ppc64_tlsld_got (ibfd2); |
12866 | 0 | if (!ent2->is_indirect |
12867 | 0 | && ent2->got.offset != (bfd_vma) -1 |
12868 | 0 | && elf_gp (ibfd2) == elf_gp (ibfd)) |
12869 | 0 | { |
12870 | 0 | ent2->is_indirect = true; |
12871 | 0 | ent2->got.ent = ent; |
12872 | 0 | } |
12873 | 0 | } |
12874 | 0 | } |
12875 | 0 | } |
12876 | | |
12877 | | /* Zap sizes of got sections. */ |
12878 | 0 | htab->elf.irelplt->rawsize = htab->elf.irelplt->size; |
12879 | 0 | htab->elf.irelplt->size -= htab->got_reli_size; |
12880 | 0 | htab->got_reli_size = 0; |
12881 | |
|
12882 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
12883 | 0 | { |
12884 | 0 | asection *got, *relgot; |
12885 | |
|
12886 | 0 | if (!is_ppc64_elf (ibfd)) |
12887 | 0 | continue; |
12888 | | |
12889 | 0 | got = ppc64_elf_tdata (ibfd)->got; |
12890 | 0 | if (got != NULL) |
12891 | 0 | { |
12892 | 0 | got->rawsize = got->size; |
12893 | 0 | got->size = 0; |
12894 | 0 | relgot = ppc64_elf_tdata (ibfd)->relgot; |
12895 | 0 | relgot->rawsize = relgot->size; |
12896 | 0 | relgot->size = 0; |
12897 | 0 | } |
12898 | 0 | } |
12899 | | |
12900 | | /* Now reallocate the got, local syms first. We don't need to |
12901 | | allocate section contents again since we never increase size. */ |
12902 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
12903 | 0 | { |
12904 | 0 | struct got_entry **lgot_ents; |
12905 | 0 | struct got_entry **end_lgot_ents; |
12906 | 0 | struct plt_entry **local_plt; |
12907 | 0 | struct plt_entry **end_local_plt; |
12908 | 0 | unsigned char *lgot_masks; |
12909 | 0 | bfd_size_type locsymcount; |
12910 | 0 | Elf_Internal_Shdr *symtab_hdr; |
12911 | 0 | asection *s; |
12912 | 0 | Elf_Internal_Sym *local_syms; |
12913 | 0 | Elf_Internal_Sym *isym; |
12914 | |
|
12915 | 0 | if (!is_ppc64_elf (ibfd)) |
12916 | 0 | continue; |
12917 | | |
12918 | 0 | lgot_ents = elf_local_got_ents (ibfd); |
12919 | 0 | if (!lgot_ents) |
12920 | 0 | continue; |
12921 | | |
12922 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
12923 | 0 | locsymcount = symtab_hdr->sh_info; |
12924 | 0 | end_lgot_ents = lgot_ents + locsymcount; |
12925 | 0 | local_plt = (struct plt_entry **) end_lgot_ents; |
12926 | 0 | end_local_plt = local_plt + locsymcount; |
12927 | 0 | lgot_masks = (unsigned char *) end_local_plt; |
12928 | 0 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
12929 | 0 | if (local_syms == NULL && locsymcount != 0) |
12930 | 0 | { |
12931 | 0 | local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, locsymcount, |
12932 | 0 | 0, NULL, NULL, NULL); |
12933 | 0 | if (local_syms == NULL) |
12934 | 0 | return false; |
12935 | 0 | } |
12936 | 0 | s = ppc64_elf_tdata (ibfd)->got; |
12937 | 0 | for (isym = local_syms; |
12938 | 0 | lgot_ents < end_lgot_ents; |
12939 | 0 | ++lgot_ents, ++lgot_masks, isym++) |
12940 | 0 | { |
12941 | 0 | struct got_entry *ent; |
12942 | |
|
12943 | 0 | for (ent = *lgot_ents; ent != NULL; ent = ent->next) |
12944 | 0 | { |
12945 | 0 | unsigned int ent_size = 8; |
12946 | 0 | unsigned int rel_size = sizeof (Elf64_External_Rela); |
12947 | |
|
12948 | 0 | ent->got.offset = s->size; |
12949 | 0 | if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) |
12950 | 0 | { |
12951 | 0 | ent_size *= 2; |
12952 | 0 | rel_size *= 2; |
12953 | 0 | } |
12954 | 0 | s->size += ent_size; |
12955 | 0 | if ((*lgot_masks & (TLS_TLS | PLT_IFUNC)) == PLT_IFUNC) |
12956 | 0 | { |
12957 | 0 | htab->elf.irelplt->size += rel_size; |
12958 | 0 | htab->got_reli_size += rel_size; |
12959 | 0 | } |
12960 | 0 | else if (bfd_link_pic (info) |
12961 | 0 | && (ent->tls_type == 0 |
12962 | 0 | ? !info->enable_dt_relr |
12963 | 0 | : !bfd_link_executable (info)) |
12964 | 0 | && isym->st_shndx != SHN_ABS) |
12965 | 0 | { |
12966 | 0 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
12967 | 0 | srel->size += rel_size; |
12968 | 0 | } |
12969 | 0 | } |
12970 | 0 | } |
12971 | 0 | } |
12972 | | |
12973 | 0 | elf_link_hash_traverse (&htab->elf, reallocate_got, info); |
12974 | |
|
12975 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
12976 | 0 | { |
12977 | 0 | struct got_entry *ent; |
12978 | |
|
12979 | 0 | if (!is_ppc64_elf (ibfd)) |
12980 | 0 | continue; |
12981 | | |
12982 | 0 | ent = ppc64_tlsld_got (ibfd); |
12983 | 0 | if (!ent->is_indirect |
12984 | 0 | && ent->got.offset != (bfd_vma) -1) |
12985 | 0 | { |
12986 | 0 | asection *s = ppc64_elf_tdata (ibfd)->got; |
12987 | 0 | ent->got.offset = s->size; |
12988 | 0 | s->size += 16; |
12989 | 0 | if (bfd_link_dll (info)) |
12990 | 0 | { |
12991 | 0 | asection *srel = ppc64_elf_tdata (ibfd)->relgot; |
12992 | 0 | srel->size += sizeof (Elf64_External_Rela); |
12993 | 0 | } |
12994 | 0 | } |
12995 | 0 | } |
12996 | |
|
12997 | 0 | done_something = htab->elf.irelplt->rawsize != htab->elf.irelplt->size; |
12998 | 0 | if (!done_something) |
12999 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
13000 | 0 | { |
13001 | 0 | asection *got; |
13002 | |
|
13003 | 0 | if (!is_ppc64_elf (ibfd)) |
13004 | 0 | continue; |
13005 | | |
13006 | 0 | got = ppc64_elf_tdata (ibfd)->got; |
13007 | 0 | if (got != NULL) |
13008 | 0 | { |
13009 | 0 | done_something = got->rawsize != got->size; |
13010 | 0 | if (done_something) |
13011 | 0 | break; |
13012 | 0 | } |
13013 | 0 | } |
13014 | |
|
13015 | 0 | if (done_something) |
13016 | 0 | (*htab->params->layout_sections_again) (); |
13017 | | |
13018 | | /* Set up for second pass over toc sections to recalculate elf_gp |
13019 | | on input sections. */ |
13020 | 0 | htab->toc_bfd = NULL; |
13021 | 0 | htab->toc_first_sec = NULL; |
13022 | 0 | htab->second_toc_pass = true; |
13023 | 0 | return done_something; |
13024 | 0 | } |
13025 | | |
13026 | | /* Called after second pass of multitoc partitioning. */ |
13027 | | |
13028 | | void |
13029 | | ppc64_elf_finish_multitoc_partition (struct bfd_link_info *info) |
13030 | 0 | { |
13031 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
13032 | | |
13033 | | /* After the second pass, toc_curr tracks the TOC offset used |
13034 | | for code sections below in ppc64_elf_next_input_section. */ |
13035 | 0 | htab->toc_curr = TOC_BASE_OFF; |
13036 | 0 | } |
13037 | | |
13038 | | /* No toc references were found in ISEC. If the code in ISEC makes no |
13039 | | calls, then there's no need to use toc adjusting stubs when branching |
13040 | | into ISEC. Actually, indirect calls from ISEC are OK as they will |
13041 | | load r2. Returns -1 on error, 0 for no stub needed, 1 for stub |
13042 | | needed, and 2 if a cyclical call-graph was found but no other reason |
13043 | | for a stub was detected. If called from the top level, a return of |
13044 | | 2 means the same as a return of 0. */ |
13045 | | |
13046 | | static int |
13047 | | toc_adjusting_stub_needed (struct bfd_link_info *info, asection *isec) |
13048 | 0 | { |
13049 | 0 | int ret; |
13050 | | |
13051 | | /* Mark this section as checked. */ |
13052 | 0 | isec->call_check_done = 1; |
13053 | | |
13054 | | /* We know none of our code bearing sections will need toc stubs. */ |
13055 | 0 | if ((isec->flags & SEC_LINKER_CREATED) != 0) |
13056 | 0 | return 0; |
13057 | | |
13058 | 0 | if (isec->size == 0) |
13059 | 0 | return 0; |
13060 | | |
13061 | 0 | if (isec->output_section == NULL) |
13062 | 0 | return 0; |
13063 | | |
13064 | 0 | ret = 0; |
13065 | 0 | if (isec->reloc_count != 0) |
13066 | 0 | { |
13067 | 0 | Elf_Internal_Rela *relstart, *rel; |
13068 | 0 | Elf_Internal_Sym *local_syms; |
13069 | 0 | struct ppc_link_hash_table *htab; |
13070 | |
|
13071 | 0 | relstart = _bfd_elf_link_read_relocs (isec->owner, isec, NULL, NULL, |
13072 | 0 | info->keep_memory); |
13073 | 0 | if (relstart == NULL) |
13074 | 0 | return -1; |
13075 | | |
13076 | | /* Look for branches to outside of this section. */ |
13077 | 0 | local_syms = NULL; |
13078 | 0 | htab = ppc_hash_table (info); |
13079 | 0 | if (htab == NULL) |
13080 | 0 | return -1; |
13081 | | |
13082 | 0 | for (rel = relstart; rel < relstart + isec->reloc_count; ++rel) |
13083 | 0 | { |
13084 | 0 | enum elf_ppc64_reloc_type r_type; |
13085 | 0 | unsigned long r_symndx; |
13086 | 0 | struct elf_link_hash_entry *h; |
13087 | 0 | struct ppc_link_hash_entry *eh; |
13088 | 0 | Elf_Internal_Sym *sym; |
13089 | 0 | asection *sym_sec; |
13090 | 0 | struct _opd_sec_data *opd; |
13091 | 0 | bfd_vma sym_value; |
13092 | 0 | bfd_vma dest; |
13093 | |
|
13094 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
13095 | 0 | if (r_type != R_PPC64_REL24 |
13096 | 0 | && r_type != R_PPC64_REL24_NOTOC |
13097 | 0 | && r_type != R_PPC64_REL24_P9NOTOC |
13098 | 0 | && r_type != R_PPC64_REL14 |
13099 | 0 | && r_type != R_PPC64_REL14_BRTAKEN |
13100 | 0 | && r_type != R_PPC64_REL14_BRNTAKEN |
13101 | 0 | && r_type != R_PPC64_PLTCALL |
13102 | 0 | && r_type != R_PPC64_PLTCALL_NOTOC) |
13103 | 0 | continue; |
13104 | | |
13105 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
13106 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, r_symndx, |
13107 | 0 | isec->owner)) |
13108 | 0 | { |
13109 | 0 | ret = -1; |
13110 | 0 | break; |
13111 | 0 | } |
13112 | | |
13113 | | /* Calls to dynamic lib functions go through a plt call stub |
13114 | | that uses r2. */ |
13115 | 0 | eh = ppc_elf_hash_entry (h); |
13116 | 0 | if (eh != NULL |
13117 | 0 | && (eh->elf.plt.plist != NULL |
13118 | 0 | || (eh->oh != NULL |
13119 | 0 | && ppc_follow_link (eh->oh)->elf.plt.plist != NULL))) |
13120 | 0 | { |
13121 | 0 | ret = 1; |
13122 | 0 | break; |
13123 | 0 | } |
13124 | | |
13125 | 0 | if (sym_sec == NULL) |
13126 | | /* Ignore other undefined symbols. */ |
13127 | 0 | continue; |
13128 | | |
13129 | | /* Assume branches to other sections not included in the |
13130 | | link need stubs too, to cover -R and absolute syms. */ |
13131 | 0 | if (sym_sec->output_section == NULL) |
13132 | 0 | { |
13133 | 0 | ret = 1; |
13134 | 0 | break; |
13135 | 0 | } |
13136 | | |
13137 | 0 | if (h == NULL) |
13138 | 0 | sym_value = sym->st_value; |
13139 | 0 | else |
13140 | 0 | { |
13141 | 0 | if (h->root.type != bfd_link_hash_defined |
13142 | 0 | && h->root.type != bfd_link_hash_defweak) |
13143 | 0 | abort (); |
13144 | 0 | sym_value = h->root.u.def.value; |
13145 | 0 | } |
13146 | 0 | sym_value += rel->r_addend; |
13147 | | |
13148 | | /* If this branch reloc uses an opd sym, find the code section. */ |
13149 | 0 | opd = get_opd_info (sym_sec); |
13150 | 0 | if (opd != NULL) |
13151 | 0 | { |
13152 | 0 | if (h == NULL && opd->adjust != NULL) |
13153 | 0 | { |
13154 | 0 | long adjust; |
13155 | |
|
13156 | 0 | adjust = opd->adjust[OPD_NDX (sym_value)]; |
13157 | 0 | if (adjust == -1) |
13158 | | /* Assume deleted functions won't ever be called. */ |
13159 | 0 | continue; |
13160 | 0 | sym_value += adjust; |
13161 | 0 | } |
13162 | | |
13163 | 0 | dest = opd_entry_value (sym_sec, sym_value, |
13164 | 0 | &sym_sec, NULL, false); |
13165 | 0 | if (dest == (bfd_vma) -1) |
13166 | 0 | continue; |
13167 | 0 | } |
13168 | 0 | else |
13169 | 0 | dest = (sym_value |
13170 | 0 | + sym_sec->output_offset |
13171 | 0 | + sym_sec->output_section->vma); |
13172 | | |
13173 | | /* Ignore branch to self. */ |
13174 | 0 | if (sym_sec == isec) |
13175 | 0 | continue; |
13176 | | |
13177 | | /* If the called function uses the toc, we need a stub. */ |
13178 | 0 | if (sym_sec->has_toc_reloc |
13179 | 0 | || sym_sec->makes_toc_func_call) |
13180 | 0 | { |
13181 | 0 | ret = 1; |
13182 | 0 | break; |
13183 | 0 | } |
13184 | | |
13185 | | /* Assume any branch that needs a long branch stub might in fact |
13186 | | need a plt_branch stub. A plt_branch stub uses r2. */ |
13187 | 0 | else if (dest - (isec->output_offset |
13188 | 0 | + isec->output_section->vma |
13189 | 0 | + rel->r_offset) + (1 << 25) |
13190 | 0 | >= (2u << 25) - PPC64_LOCAL_ENTRY_OFFSET (h |
13191 | 0 | ? h->other |
13192 | 0 | : sym->st_other)) |
13193 | 0 | { |
13194 | 0 | ret = 1; |
13195 | 0 | break; |
13196 | 0 | } |
13197 | | |
13198 | | /* If calling back to a section in the process of being |
13199 | | tested, we can't say for sure that no toc adjusting stubs |
13200 | | are needed, so don't return zero. */ |
13201 | 0 | else if (sym_sec->call_check_in_progress) |
13202 | 0 | ret = 2; |
13203 | | |
13204 | | /* Branches to another section that itself doesn't have any TOC |
13205 | | references are OK. Recursively call ourselves to check. */ |
13206 | 0 | else if (!sym_sec->call_check_done) |
13207 | 0 | { |
13208 | 0 | int recur; |
13209 | | |
13210 | | /* Mark current section as indeterminate, so that other |
13211 | | sections that call back to current won't be marked as |
13212 | | known. */ |
13213 | 0 | isec->call_check_in_progress = 1; |
13214 | 0 | recur = toc_adjusting_stub_needed (info, sym_sec); |
13215 | 0 | isec->call_check_in_progress = 0; |
13216 | |
|
13217 | 0 | if (recur != 0) |
13218 | 0 | { |
13219 | 0 | ret = recur; |
13220 | 0 | if (recur != 2) |
13221 | 0 | break; |
13222 | 0 | } |
13223 | 0 | } |
13224 | 0 | } |
13225 | | |
13226 | 0 | if (elf_symtab_hdr (isec->owner).contents |
13227 | 0 | != (unsigned char *) local_syms) |
13228 | 0 | free (local_syms); |
13229 | 0 | if (elf_section_data (isec)->relocs != relstart) |
13230 | 0 | free (relstart); |
13231 | 0 | } |
13232 | | |
13233 | 0 | if ((ret & 1) == 0 |
13234 | 0 | && isec->map_head.s != NULL |
13235 | 0 | && (strcmp (isec->output_section->name, ".init") == 0 |
13236 | 0 | || strcmp (isec->output_section->name, ".fini") == 0)) |
13237 | 0 | { |
13238 | 0 | if (isec->map_head.s->has_toc_reloc |
13239 | 0 | || isec->map_head.s->makes_toc_func_call) |
13240 | 0 | ret = 1; |
13241 | 0 | else if (!isec->map_head.s->call_check_done) |
13242 | 0 | { |
13243 | 0 | int recur; |
13244 | 0 | isec->call_check_in_progress = 1; |
13245 | 0 | recur = toc_adjusting_stub_needed (info, isec->map_head.s); |
13246 | 0 | isec->call_check_in_progress = 0; |
13247 | 0 | if (recur != 0) |
13248 | 0 | ret = recur; |
13249 | 0 | } |
13250 | 0 | } |
13251 | |
|
13252 | 0 | if (ret == 1) |
13253 | 0 | isec->makes_toc_func_call = 1; |
13254 | |
|
13255 | 0 | return ret; |
13256 | 0 | } |
13257 | | |
13258 | | /* The linker repeatedly calls this function for each input section, |
13259 | | in the order that input sections are linked into output sections. |
13260 | | Build lists of input sections to determine groupings between which |
13261 | | we may insert linker stubs. */ |
13262 | | |
13263 | | bool |
13264 | | ppc64_elf_next_input_section (struct bfd_link_info *info, asection *isec) |
13265 | 0 | { |
13266 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
13267 | |
|
13268 | 0 | if (htab == NULL) |
13269 | 0 | return false; |
13270 | | |
13271 | 0 | if ((isec->output_section->flags & SEC_CODE) != 0 |
13272 | 0 | && isec->output_section->id < htab->sec_info_arr_size) |
13273 | 0 | { |
13274 | | /* This happens to make the list in reverse order, |
13275 | | which is what we want. */ |
13276 | 0 | htab->sec_info[isec->id].u.list |
13277 | 0 | = htab->sec_info[isec->output_section->id].u.list; |
13278 | 0 | htab->sec_info[isec->output_section->id].u.list = isec; |
13279 | 0 | } |
13280 | |
|
13281 | 0 | if (htab->multi_toc_needed) |
13282 | 0 | { |
13283 | | /* Analyse sections that aren't already flagged as needing a |
13284 | | valid toc pointer. Exclude .fixup for the linux kernel. |
13285 | | .fixup contains branches, but only back to the function that |
13286 | | hit an exception. */ |
13287 | 0 | if (!(isec->has_toc_reloc |
13288 | 0 | || (isec->flags & SEC_CODE) == 0 |
13289 | 0 | || strcmp (isec->name, ".fixup") == 0 |
13290 | 0 | || isec->call_check_done)) |
13291 | 0 | { |
13292 | 0 | if (toc_adjusting_stub_needed (info, isec) < 0) |
13293 | 0 | return false; |
13294 | 0 | } |
13295 | | /* Make all sections use the TOC assigned for this object file. |
13296 | | This will be wrong for pasted sections; We fix that in |
13297 | | check_pasted_section(). */ |
13298 | 0 | if (elf_gp (isec->owner) != 0) |
13299 | 0 | htab->toc_curr = elf_gp (isec->owner); |
13300 | 0 | } |
13301 | | |
13302 | 0 | htab->sec_info[isec->id].toc_off = htab->toc_curr; |
13303 | 0 | return true; |
13304 | 0 | } |
13305 | | |
13306 | | /* Check that all .init and .fini sections use the same toc, if they |
13307 | | have toc relocs. */ |
13308 | | |
13309 | | static bool |
13310 | | check_pasted_section (struct bfd_link_info *info, const char *name) |
13311 | 0 | { |
13312 | 0 | asection *o = bfd_get_section_by_name (info->output_bfd, name); |
13313 | |
|
13314 | 0 | if (o != NULL) |
13315 | 0 | { |
13316 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
13317 | 0 | bfd_vma toc_off = 0; |
13318 | 0 | asection *i; |
13319 | |
|
13320 | 0 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
13321 | 0 | if (i->has_toc_reloc) |
13322 | 0 | { |
13323 | 0 | if (toc_off == 0) |
13324 | 0 | toc_off = htab->sec_info[i->id].toc_off; |
13325 | 0 | else if (toc_off != htab->sec_info[i->id].toc_off) |
13326 | 0 | return false; |
13327 | 0 | } |
13328 | | |
13329 | 0 | if (toc_off == 0) |
13330 | 0 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
13331 | 0 | if (i->makes_toc_func_call) |
13332 | 0 | { |
13333 | 0 | toc_off = htab->sec_info[i->id].toc_off; |
13334 | 0 | break; |
13335 | 0 | } |
13336 | | |
13337 | | /* Make sure the whole pasted function uses the same toc offset. */ |
13338 | 0 | if (toc_off != 0) |
13339 | 0 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
13340 | 0 | htab->sec_info[i->id].toc_off = toc_off; |
13341 | 0 | } |
13342 | 0 | return true; |
13343 | 0 | } |
13344 | | |
13345 | | bool |
13346 | | ppc64_elf_check_init_fini (struct bfd_link_info *info) |
13347 | 0 | { |
13348 | 0 | bool ret1 = check_pasted_section (info, ".init"); |
13349 | 0 | bool ret2 = check_pasted_section (info, ".fini"); |
13350 | |
|
13351 | 0 | return ret1 && ret2; |
13352 | 0 | } |
13353 | | |
13354 | | /* See whether we can group stub sections together. Grouping stub |
13355 | | sections may result in fewer stubs. More importantly, we need to |
13356 | | put all .init* and .fini* stubs at the beginning of the .init or |
13357 | | .fini output sections respectively, because glibc splits the |
13358 | | _init and _fini functions into multiple parts. Putting a stub in |
13359 | | the middle of a function is not a good idea. */ |
13360 | | |
13361 | | static bool |
13362 | | group_sections (struct bfd_link_info *info, |
13363 | | bfd_size_type stub_group_size, |
13364 | | bool stubs_always_before_branch) |
13365 | 0 | { |
13366 | 0 | struct ppc_link_hash_table *htab; |
13367 | 0 | asection *osec; |
13368 | 0 | bool suppress_size_errors; |
13369 | |
|
13370 | 0 | htab = ppc_hash_table (info); |
13371 | 0 | if (htab == NULL) |
13372 | 0 | return false; |
13373 | | |
13374 | 0 | suppress_size_errors = false; |
13375 | 0 | if (stub_group_size == 1) |
13376 | 0 | { |
13377 | | /* Default values. */ |
13378 | 0 | if (stubs_always_before_branch) |
13379 | 0 | stub_group_size = 0x1e00000; |
13380 | 0 | else |
13381 | 0 | stub_group_size = 0x1c00000; |
13382 | 0 | suppress_size_errors = true; |
13383 | 0 | } |
13384 | |
|
13385 | 0 | for (osec = info->output_bfd->sections; osec != NULL; osec = osec->next) |
13386 | 0 | { |
13387 | 0 | asection *tail; |
13388 | |
|
13389 | 0 | if (osec->id >= htab->sec_info_arr_size) |
13390 | 0 | continue; |
13391 | | |
13392 | 0 | tail = htab->sec_info[osec->id].u.list; |
13393 | 0 | while (tail != NULL) |
13394 | 0 | { |
13395 | 0 | asection *curr; |
13396 | 0 | asection *prev; |
13397 | 0 | bfd_size_type total; |
13398 | 0 | bool big_sec; |
13399 | 0 | bfd_vma curr_toc; |
13400 | 0 | struct map_stub *group; |
13401 | 0 | bfd_size_type group_size; |
13402 | |
|
13403 | 0 | curr = tail; |
13404 | 0 | total = tail->size; |
13405 | 0 | group_size = (ppc64_elf_section_data (tail) != NULL |
13406 | 0 | && ppc64_elf_section_data (tail)->has_14bit_branch |
13407 | 0 | ? stub_group_size >> 10 : stub_group_size); |
13408 | |
|
13409 | 0 | big_sec = total > group_size; |
13410 | 0 | if (big_sec && !suppress_size_errors) |
13411 | | /* xgettext:c-format */ |
13412 | 0 | _bfd_error_handler (_("%pB section %pA exceeds stub group size"), |
13413 | 0 | tail->owner, tail); |
13414 | 0 | curr_toc = htab->sec_info[tail->id].toc_off; |
13415 | |
|
13416 | 0 | while ((prev = htab->sec_info[curr->id].u.list) != NULL |
13417 | 0 | && ((total += curr->output_offset - prev->output_offset) |
13418 | 0 | < (ppc64_elf_section_data (prev) != NULL |
13419 | 0 | && ppc64_elf_section_data (prev)->has_14bit_branch |
13420 | 0 | ? (group_size = stub_group_size >> 10) : group_size)) |
13421 | 0 | && htab->sec_info[prev->id].toc_off == curr_toc) |
13422 | 0 | curr = prev; |
13423 | | |
13424 | | /* OK, the size from the start of CURR to the end is less |
13425 | | than group_size and thus can be handled by one stub |
13426 | | section. (or the tail section is itself larger than |
13427 | | group_size, in which case we may be toast.) We should |
13428 | | really be keeping track of the total size of stubs added |
13429 | | here, as stubs contribute to the final output section |
13430 | | size. That's a little tricky, and this way will only |
13431 | | break if stubs added make the total size more than 2^25, |
13432 | | ie. for the default stub_group_size, if stubs total more |
13433 | | than 2097152 bytes, or nearly 75000 plt call stubs. */ |
13434 | 0 | group = bfd_alloc (curr->owner, sizeof (*group)); |
13435 | 0 | if (group == NULL) |
13436 | 0 | return false; |
13437 | 0 | group->link_sec = curr; |
13438 | 0 | group->stub_sec = NULL; |
13439 | 0 | group->needs_save_res = 0; |
13440 | 0 | group->lr_restore = 0; |
13441 | 0 | group->eh_size = 0; |
13442 | 0 | group->eh_base = 0; |
13443 | 0 | group->next = htab->group; |
13444 | 0 | htab->group = group; |
13445 | 0 | do |
13446 | 0 | { |
13447 | 0 | prev = htab->sec_info[tail->id].u.list; |
13448 | | /* Set up this stub group. */ |
13449 | 0 | htab->sec_info[tail->id].u.group = group; |
13450 | 0 | } |
13451 | 0 | while (tail != curr && (tail = prev) != NULL); |
13452 | | |
13453 | | /* But wait, there's more! Input sections up to group_size |
13454 | | bytes before the stub section can be handled by it too. |
13455 | | Don't do this if we have a really large section after the |
13456 | | stubs, as adding more stubs increases the chance that |
13457 | | branches may not reach into the stub section. */ |
13458 | 0 | if (!stubs_always_before_branch && !big_sec) |
13459 | 0 | { |
13460 | 0 | total = 0; |
13461 | 0 | while (prev != NULL |
13462 | 0 | && ((total += tail->output_offset - prev->output_offset) |
13463 | 0 | < (ppc64_elf_section_data (prev) != NULL |
13464 | 0 | && ppc64_elf_section_data (prev)->has_14bit_branch |
13465 | 0 | ? (group_size = stub_group_size >> 10) |
13466 | 0 | : group_size)) |
13467 | 0 | && htab->sec_info[prev->id].toc_off == curr_toc) |
13468 | 0 | { |
13469 | 0 | tail = prev; |
13470 | 0 | prev = htab->sec_info[tail->id].u.list; |
13471 | 0 | htab->sec_info[tail->id].u.group = group; |
13472 | 0 | } |
13473 | 0 | } |
13474 | 0 | tail = prev; |
13475 | 0 | } |
13476 | 0 | } |
13477 | 0 | return true; |
13478 | 0 | } |
13479 | | |
13480 | | static const unsigned char glink_eh_frame_cie[] = |
13481 | | { |
13482 | | 0, 0, 0, 16, /* length. */ |
13483 | | 0, 0, 0, 0, /* id. */ |
13484 | | 1, /* CIE version. */ |
13485 | | 'z', 'R', 0, /* Augmentation string. */ |
13486 | | 4, /* Code alignment. */ |
13487 | | 0x78, /* Data alignment. */ |
13488 | | 65, /* RA reg. */ |
13489 | | 1, /* Augmentation size. */ |
13490 | | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding. */ |
13491 | | DW_CFA_def_cfa, 1, 0 /* def_cfa: r1 offset 0. */ |
13492 | | }; |
13493 | | |
13494 | | /* Stripping output sections is normally done before dynamic section |
13495 | | symbols have been allocated. This function is called later, and |
13496 | | handles cases like htab->brlt which is mapped to its own output |
13497 | | section. */ |
13498 | | |
13499 | | static void |
13500 | | maybe_strip_output (struct bfd_link_info *info, asection *isec) |
13501 | 0 | { |
13502 | 0 | if (isec->size == 0 |
13503 | 0 | && isec->output_section->size == 0 |
13504 | 0 | && !(isec->output_section->flags & SEC_KEEP) |
13505 | 0 | && !bfd_section_removed_from_list (info->output_bfd, |
13506 | 0 | isec->output_section) |
13507 | 0 | && elf_section_data (isec->output_section)->dynindx == 0) |
13508 | 0 | { |
13509 | 0 | isec->output_section->flags |= SEC_EXCLUDE; |
13510 | 0 | bfd_section_list_remove (info->output_bfd, isec->output_section); |
13511 | 0 | info->output_bfd->section_count--; |
13512 | 0 | } |
13513 | 0 | } |
13514 | | |
13515 | | /* Stash R_PPC64_RELATIVE reloc at input section SEC, r_offset OFF to |
13516 | | the array of such relocs. */ |
13517 | | |
13518 | | static bool |
13519 | | append_relr_off (struct ppc_link_hash_table *htab, asection *sec, bfd_vma off) |
13520 | 0 | { |
13521 | 0 | if (htab->relr_count >= htab->relr_alloc) |
13522 | 0 | { |
13523 | 0 | if (htab->relr_alloc == 0) |
13524 | 0 | htab->relr_alloc = 4096; |
13525 | 0 | else |
13526 | 0 | htab->relr_alloc *= 2; |
13527 | 0 | htab->relr = bfd_realloc (htab->relr, |
13528 | 0 | htab->relr_alloc * sizeof (*htab->relr)); |
13529 | 0 | if (htab->relr == NULL) |
13530 | 0 | return false; |
13531 | 0 | } |
13532 | 0 | htab->relr[htab->relr_count].sec = sec; |
13533 | 0 | htab->relr[htab->relr_count].off = off; |
13534 | 0 | htab->relr_count++; |
13535 | 0 | return true; |
13536 | 0 | } |
13537 | | |
13538 | | /* qsort comparator for bfd_vma args. */ |
13539 | | |
13540 | | static int |
13541 | | compare_relr_address (const void *arg1, const void *arg2) |
13542 | 0 | { |
13543 | 0 | bfd_vma a = *(bfd_vma *) arg1; |
13544 | 0 | bfd_vma b = *(bfd_vma *) arg2; |
13545 | 0 | return a < b ? -1 : a > b ? 1 : 0; |
13546 | 0 | } |
13547 | | |
13548 | | /* Produce a malloc'd sorted array of reloc addresses from the info |
13549 | | stored by append_relr_off. */ |
13550 | | |
13551 | | static bfd_vma * |
13552 | | sort_relr (struct ppc_link_hash_table *htab) |
13553 | 0 | { |
13554 | 0 | bfd_vma *addr = bfd_malloc (htab->relr_count * sizeof (*addr)); |
13555 | 0 | if (addr == NULL) |
13556 | 0 | return NULL; |
13557 | | |
13558 | 0 | for (size_t i = 0; i < htab->relr_count; i++) |
13559 | 0 | addr[i] = (htab->relr[i].sec->output_section->vma |
13560 | 0 | + htab->relr[i].sec->output_offset |
13561 | 0 | + htab->relr[i].off); |
13562 | |
|
13563 | 0 | if (htab->relr_count > 1) |
13564 | 0 | qsort (addr, htab->relr_count, sizeof (*addr), compare_relr_address); |
13565 | |
|
13566 | 0 | return addr; |
13567 | 0 | } |
13568 | | |
13569 | | /* Look over GOT and PLT entries saved on elf_local_got_ents for all |
13570 | | input files, stashing info about needed relative relocs. */ |
13571 | | |
13572 | | static bool |
13573 | | got_and_plt_relr_for_local_syms (struct bfd_link_info *info) |
13574 | 0 | { |
13575 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
13576 | 0 | bfd *ibfd; |
13577 | |
|
13578 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
13579 | 0 | { |
13580 | 0 | struct got_entry **lgot_ents, **lgot, **end_lgot_ents; |
13581 | 0 | struct plt_entry **local_plt, **lplt, **end_local_plt; |
13582 | 0 | Elf_Internal_Shdr *symtab_hdr; |
13583 | 0 | bfd_size_type locsymcount; |
13584 | 0 | Elf_Internal_Sym *local_syms; |
13585 | 0 | Elf_Internal_Sym *isym; |
13586 | 0 | struct plt_entry *pent; |
13587 | 0 | struct got_entry *gent; |
13588 | |
|
13589 | 0 | if (!is_ppc64_elf (ibfd)) |
13590 | 0 | continue; |
13591 | | |
13592 | 0 | lgot_ents = elf_local_got_ents (ibfd); |
13593 | 0 | if (!lgot_ents) |
13594 | 0 | continue; |
13595 | | |
13596 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
13597 | 0 | locsymcount = symtab_hdr->sh_info; |
13598 | 0 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; |
13599 | 0 | if (local_syms == NULL && locsymcount != 0) |
13600 | 0 | { |
13601 | 0 | local_syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, locsymcount, |
13602 | 0 | 0, NULL, NULL, NULL); |
13603 | 0 | if (local_syms == NULL) |
13604 | 0 | return false; |
13605 | 0 | } |
13606 | 0 | end_lgot_ents = lgot_ents + locsymcount; |
13607 | 0 | local_plt = (struct plt_entry **) end_lgot_ents; |
13608 | 0 | end_local_plt = local_plt + locsymcount; |
13609 | 0 | for (lgot = lgot_ents, isym = local_syms; |
13610 | 0 | lgot < end_lgot_ents; |
13611 | 0 | ++lgot, ++isym) |
13612 | 0 | for (gent = *lgot; gent != NULL; gent = gent->next) |
13613 | 0 | if (!gent->is_indirect |
13614 | 0 | && gent->tls_type == 0 |
13615 | 0 | && gent->got.offset != (bfd_vma) -1 |
13616 | 0 | && isym->st_shndx != SHN_ABS) |
13617 | 0 | { |
13618 | 0 | asection *got = ppc64_elf_tdata (gent->owner)->got; |
13619 | 0 | if (!append_relr_off (htab, got, gent->got.offset)) |
13620 | 0 | { |
13621 | 0 | htab->stub_error = true; |
13622 | 0 | return false; |
13623 | 0 | } |
13624 | 0 | } |
13625 | | |
13626 | 0 | if (!htab->opd_abi) |
13627 | 0 | for (lplt = local_plt, isym = local_syms; |
13628 | 0 | lplt < end_local_plt; |
13629 | 0 | ++lplt, ++isym) |
13630 | 0 | for (pent = *lplt; pent != NULL; pent = pent->next) |
13631 | 0 | if (pent->plt.offset != (bfd_vma) -1 |
13632 | 0 | && ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC) |
13633 | 0 | { |
13634 | 0 | if (!append_relr_off (htab, htab->pltlocal, pent->plt.offset)) |
13635 | 0 | { |
13636 | 0 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
13637 | 0 | free (local_syms); |
13638 | 0 | return false; |
13639 | 0 | } |
13640 | 0 | } |
13641 | | |
13642 | 0 | if (local_syms != NULL |
13643 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
13644 | 0 | { |
13645 | 0 | if (!info->keep_memory) |
13646 | 0 | free (local_syms); |
13647 | 0 | else |
13648 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
13649 | 0 | } |
13650 | 0 | } |
13651 | 0 | return true; |
13652 | 0 | } |
13653 | | |
13654 | | /* Stash info about needed GOT and PLT entry relative relocs for |
13655 | | global symbol H. */ |
13656 | | |
13657 | | static bool |
13658 | | got_and_plt_relr (struct elf_link_hash_entry *h, void *inf) |
13659 | 0 | { |
13660 | 0 | struct bfd_link_info *info; |
13661 | 0 | struct ppc_link_hash_table *htab; |
13662 | 0 | struct plt_entry *pent; |
13663 | 0 | struct got_entry *gent; |
13664 | |
|
13665 | 0 | if (h->root.type == bfd_link_hash_indirect) |
13666 | 0 | return true; |
13667 | | |
13668 | 0 | info = (struct bfd_link_info *) inf; |
13669 | 0 | htab = ppc_hash_table (info); |
13670 | 0 | if (htab == NULL) |
13671 | 0 | return false; |
13672 | | |
13673 | 0 | if (h->type != STT_GNU_IFUNC |
13674 | 0 | && h->def_regular |
13675 | 0 | && (h->root.type == bfd_link_hash_defined |
13676 | 0 | || h->root.type == bfd_link_hash_defweak)) |
13677 | 0 | { |
13678 | 0 | if ((!htab->elf.dynamic_sections_created |
13679 | 0 | || h->dynindx == -1 |
13680 | 0 | || SYMBOL_REFERENCES_LOCAL (info, h)) |
13681 | 0 | && !bfd_is_abs_symbol (&h->root)) |
13682 | 0 | for (gent = h->got.glist; gent != NULL; gent = gent->next) |
13683 | 0 | if (!gent->is_indirect |
13684 | 0 | && gent->tls_type == 0 |
13685 | 0 | && gent->got.offset != (bfd_vma) -1) |
13686 | 0 | { |
13687 | 0 | asection *got = ppc64_elf_tdata (gent->owner)->got; |
13688 | 0 | if (!append_relr_off (htab, got, gent->got.offset)) |
13689 | 0 | { |
13690 | 0 | htab->stub_error = true; |
13691 | 0 | return false; |
13692 | 0 | } |
13693 | 0 | } |
13694 | | |
13695 | 0 | if (!htab->opd_abi |
13696 | 0 | && use_local_plt (info, h)) |
13697 | 0 | for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
13698 | 0 | if (pent->plt.offset != (bfd_vma) -1) |
13699 | 0 | { |
13700 | 0 | if (!append_relr_off (htab, htab->pltlocal, pent->plt.offset)) |
13701 | 0 | { |
13702 | 0 | htab->stub_error = true; |
13703 | 0 | return false; |
13704 | 0 | } |
13705 | 0 | } |
13706 | 0 | } |
13707 | 0 | return true; |
13708 | 0 | } |
13709 | | |
13710 | | /* Determine and set the size of the stub section for a final link. |
13711 | | |
13712 | | The basic idea here is to examine all the relocations looking for |
13713 | | PC-relative calls to a target that is unreachable with a "bl" |
13714 | | instruction. */ |
13715 | | |
13716 | | bool |
13717 | | ppc64_elf_size_stubs (struct bfd_link_info *info) |
13718 | 0 | { |
13719 | 0 | bfd_size_type stub_group_size; |
13720 | 0 | bool stubs_always_before_branch; |
13721 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
13722 | |
|
13723 | 0 | if (htab == NULL) |
13724 | 0 | return false; |
13725 | | |
13726 | 0 | if (htab->params->power10_stubs == -1 && !htab->has_power10_relocs) |
13727 | 0 | htab->params->power10_stubs = 0; |
13728 | |
|
13729 | 0 | if (htab->params->plt_thread_safe == -1 && !bfd_link_executable (info)) |
13730 | 0 | htab->params->plt_thread_safe = 1; |
13731 | 0 | if (!htab->opd_abi) |
13732 | 0 | htab->params->plt_thread_safe = 0; |
13733 | 0 | else if (htab->params->plt_thread_safe == -1) |
13734 | 0 | { |
13735 | 0 | static const char *const thread_starter[] = |
13736 | 0 | { |
13737 | 0 | "pthread_create", |
13738 | | /* libstdc++ */ |
13739 | 0 | "_ZNSt6thread15_M_start_threadESt10shared_ptrINS_10_Impl_baseEE", |
13740 | | /* librt */ |
13741 | 0 | "aio_init", "aio_read", "aio_write", "aio_fsync", "lio_listio", |
13742 | 0 | "mq_notify", "create_timer", |
13743 | | /* libanl */ |
13744 | 0 | "getaddrinfo_a", |
13745 | | /* libgomp */ |
13746 | 0 | "GOMP_parallel", |
13747 | 0 | "GOMP_parallel_start", |
13748 | 0 | "GOMP_parallel_loop_static", |
13749 | 0 | "GOMP_parallel_loop_static_start", |
13750 | 0 | "GOMP_parallel_loop_dynamic", |
13751 | 0 | "GOMP_parallel_loop_dynamic_start", |
13752 | 0 | "GOMP_parallel_loop_guided", |
13753 | 0 | "GOMP_parallel_loop_guided_start", |
13754 | 0 | "GOMP_parallel_loop_runtime", |
13755 | 0 | "GOMP_parallel_loop_runtime_start", |
13756 | 0 | "GOMP_parallel_sections", |
13757 | 0 | "GOMP_parallel_sections_start", |
13758 | | /* libgo */ |
13759 | 0 | "__go_go", |
13760 | 0 | }; |
13761 | 0 | unsigned i; |
13762 | |
|
13763 | 0 | for (i = 0; i < ARRAY_SIZE (thread_starter); i++) |
13764 | 0 | { |
13765 | 0 | struct elf_link_hash_entry *h; |
13766 | 0 | h = elf_link_hash_lookup (&htab->elf, thread_starter[i], |
13767 | 0 | false, false, true); |
13768 | 0 | htab->params->plt_thread_safe = h != NULL && h->ref_regular; |
13769 | 0 | if (htab->params->plt_thread_safe) |
13770 | 0 | break; |
13771 | 0 | } |
13772 | 0 | } |
13773 | 0 | stubs_always_before_branch = htab->params->group_size < 0; |
13774 | 0 | if (htab->params->group_size < 0) |
13775 | 0 | stub_group_size = -htab->params->group_size; |
13776 | 0 | else |
13777 | 0 | stub_group_size = htab->params->group_size; |
13778 | |
|
13779 | 0 | if (!group_sections (info, stub_group_size, stubs_always_before_branch)) |
13780 | 0 | return false; |
13781 | | |
13782 | 0 | htab->tga_group = NULL; |
13783 | 0 | if (!htab->params->no_tls_get_addr_regsave |
13784 | 0 | && htab->tga_desc_fd != NULL |
13785 | 0 | && (htab->tga_desc_fd->elf.root.type == bfd_link_hash_undefined |
13786 | 0 | || htab->tga_desc_fd->elf.root.type == bfd_link_hash_undefweak) |
13787 | 0 | && htab->tls_get_addr_fd != NULL |
13788 | 0 | && is_static_defined (&htab->tls_get_addr_fd->elf)) |
13789 | 0 | { |
13790 | 0 | asection *sym_sec, *code_sec, *stub_sec; |
13791 | 0 | bfd_vma sym_value; |
13792 | 0 | struct _opd_sec_data *opd; |
13793 | |
|
13794 | 0 | sym_sec = htab->tls_get_addr_fd->elf.root.u.def.section; |
13795 | 0 | sym_value = defined_sym_val (&htab->tls_get_addr_fd->elf); |
13796 | 0 | code_sec = sym_sec; |
13797 | 0 | opd = get_opd_info (sym_sec); |
13798 | 0 | if (opd != NULL) |
13799 | 0 | opd_entry_value (sym_sec, sym_value, &code_sec, NULL, false); |
13800 | 0 | htab->tga_group = htab->sec_info[code_sec->id].u.group; |
13801 | 0 | stub_sec = (*htab->params->add_stub_section) (".tga_desc.stub", |
13802 | 0 | htab->tga_group->link_sec); |
13803 | 0 | if (stub_sec == NULL) |
13804 | 0 | return false; |
13805 | 0 | htab->tga_group->stub_sec = stub_sec; |
13806 | |
|
13807 | 0 | htab->tga_desc_fd->elf.root.type = bfd_link_hash_defined; |
13808 | 0 | htab->tga_desc_fd->elf.root.u.def.section = stub_sec; |
13809 | 0 | htab->tga_desc_fd->elf.root.u.def.value = 0; |
13810 | 0 | htab->tga_desc_fd->elf.type = STT_FUNC; |
13811 | 0 | htab->tga_desc_fd->elf.def_regular = 1; |
13812 | 0 | htab->tga_desc_fd->elf.non_elf = 0; |
13813 | 0 | _bfd_elf_link_hash_hide_symbol (info, &htab->tga_desc_fd->elf, true); |
13814 | 0 | } |
13815 | | |
13816 | | /* Loop until no stubs added. After iteration 20 of this loop we may |
13817 | | exit on a stub section shrinking. */ |
13818 | | |
13819 | 0 | while (1) |
13820 | 0 | { |
13821 | 0 | bfd *input_bfd; |
13822 | 0 | unsigned int bfd_indx; |
13823 | 0 | struct map_stub *group; |
13824 | |
|
13825 | 0 | htab->stub_iteration += 1; |
13826 | 0 | htab->relr_count = 0; |
13827 | |
|
13828 | 0 | for (input_bfd = info->input_bfds, bfd_indx = 0; |
13829 | 0 | input_bfd != NULL; |
13830 | 0 | input_bfd = input_bfd->link.next, bfd_indx++) |
13831 | 0 | { |
13832 | 0 | Elf_Internal_Shdr *symtab_hdr; |
13833 | 0 | asection *section; |
13834 | 0 | Elf_Internal_Sym *local_syms = NULL; |
13835 | |
|
13836 | 0 | if (!is_ppc64_elf (input_bfd)) |
13837 | 0 | continue; |
13838 | | |
13839 | | /* We'll need the symbol table in a second. */ |
13840 | 0 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
13841 | 0 | if (symtab_hdr->sh_info == 0) |
13842 | 0 | continue; |
13843 | | |
13844 | | /* Walk over each section attached to the input bfd. */ |
13845 | 0 | for (section = input_bfd->sections; |
13846 | 0 | section != NULL; |
13847 | 0 | section = section->next) |
13848 | 0 | { |
13849 | 0 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
13850 | 0 | bool is_opd; |
13851 | | |
13852 | | /* If there aren't any relocs, then there's nothing more |
13853 | | to do. */ |
13854 | 0 | if ((section->flags & SEC_RELOC) == 0 |
13855 | 0 | || (section->flags & SEC_ALLOC) == 0 |
13856 | 0 | || (section->flags & SEC_LOAD) == 0 |
13857 | 0 | || section->reloc_count == 0) |
13858 | 0 | continue; |
13859 | | |
13860 | 0 | if (!info->enable_dt_relr |
13861 | 0 | && (section->flags & SEC_CODE) == 0) |
13862 | 0 | continue; |
13863 | | |
13864 | | /* If this section is a link-once section that will be |
13865 | | discarded, then don't create any stubs. */ |
13866 | 0 | if (section->output_section == NULL |
13867 | 0 | || section->output_section->owner != info->output_bfd) |
13868 | 0 | continue; |
13869 | | |
13870 | | /* Get the relocs. */ |
13871 | 0 | internal_relocs |
13872 | 0 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, |
13873 | 0 | info->keep_memory); |
13874 | 0 | if (internal_relocs == NULL) |
13875 | 0 | goto error_ret_free_local; |
13876 | | |
13877 | 0 | is_opd = ppc64_elf_section_data (section)->sec_type == sec_opd; |
13878 | | |
13879 | | /* Now examine each relocation. */ |
13880 | 0 | irela = internal_relocs; |
13881 | 0 | irelaend = irela + section->reloc_count; |
13882 | 0 | for (; irela < irelaend; irela++) |
13883 | 0 | { |
13884 | 0 | enum elf_ppc64_reloc_type r_type; |
13885 | 0 | unsigned int r_indx; |
13886 | 0 | struct ppc_stub_type stub_type; |
13887 | 0 | struct ppc_stub_hash_entry *stub_entry; |
13888 | 0 | asection *sym_sec, *code_sec; |
13889 | 0 | bfd_vma sym_value, code_value; |
13890 | 0 | bfd_vma destination; |
13891 | 0 | unsigned long local_off; |
13892 | 0 | bool ok_dest; |
13893 | 0 | struct ppc_link_hash_entry *hash; |
13894 | 0 | struct ppc_link_hash_entry *fdh; |
13895 | 0 | struct elf_link_hash_entry *h; |
13896 | 0 | Elf_Internal_Sym *sym; |
13897 | 0 | char *stub_name; |
13898 | 0 | const asection *id_sec; |
13899 | 0 | struct _opd_sec_data *opd; |
13900 | 0 | struct plt_entry *plt_ent; |
13901 | |
|
13902 | 0 | r_type = ELF64_R_TYPE (irela->r_info); |
13903 | 0 | r_indx = ELF64_R_SYM (irela->r_info); |
13904 | |
|
13905 | 0 | if (r_type >= R_PPC64_max) |
13906 | 0 | { |
13907 | 0 | bfd_set_error (bfd_error_bad_value); |
13908 | 0 | goto error_ret_free_internal; |
13909 | 0 | } |
13910 | | |
13911 | | /* Only look for stubs on branch instructions. */ |
13912 | 0 | switch (r_type) |
13913 | 0 | { |
13914 | 0 | default: |
13915 | 0 | if (info->enable_dt_relr |
13916 | 0 | && maybe_relr (r_type, irela, section)) |
13917 | 0 | break; |
13918 | 0 | continue; |
13919 | | |
13920 | 0 | case R_PPC64_REL24: |
13921 | 0 | case R_PPC64_REL24_NOTOC: |
13922 | 0 | case R_PPC64_REL24_P9NOTOC: |
13923 | 0 | case R_PPC64_REL14: |
13924 | 0 | case R_PPC64_REL14_BRTAKEN: |
13925 | 0 | case R_PPC64_REL14_BRNTAKEN: |
13926 | 0 | if ((section->flags & SEC_CODE) != 0) |
13927 | 0 | break; |
13928 | 0 | continue; |
13929 | 0 | } |
13930 | | |
13931 | | /* Now determine the call target, its name, value, |
13932 | | section. */ |
13933 | 0 | if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
13934 | 0 | r_indx, input_bfd)) |
13935 | 0 | goto error_ret_free_internal; |
13936 | | |
13937 | 0 | if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
13938 | 0 | { |
13939 | | /* Only locally defined symbols can possibly use |
13940 | | relative relocations. */ |
13941 | 0 | bfd_vma r_offset; |
13942 | 0 | if ((sym_sec == NULL |
13943 | 0 | || sym_sec->output_section == NULL) |
13944 | | /* No symbol is OK too. */ |
13945 | 0 | && !(sym != NULL && sym->st_shndx == 0) |
13946 | | /* Hack for __ehdr_start, which is undefined |
13947 | | at this point. */ |
13948 | 0 | && !(h != NULL && h->root.linker_def)) |
13949 | 0 | continue; |
13950 | 0 | if (NO_OPD_RELOCS && is_opd) |
13951 | 0 | continue; |
13952 | 0 | if (!is_opd |
13953 | 0 | && r_type == R_PPC64_ADDR64) |
13954 | 0 | { |
13955 | 0 | if (h != NULL |
13956 | 0 | ? h->type == STT_GNU_IFUNC |
13957 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
13958 | 0 | continue; |
13959 | 0 | if (h != NULL |
13960 | 0 | ? bfd_is_abs_symbol (&h->root) |
13961 | 0 | : sym->st_shndx == SHN_ABS) |
13962 | 0 | continue; |
13963 | 0 | if (h != NULL |
13964 | 0 | && !SYMBOL_REFERENCES_LOCAL (info, h)) |
13965 | 0 | continue; |
13966 | 0 | } |
13967 | 0 | r_offset = _bfd_elf_section_offset (info->output_bfd, |
13968 | 0 | info, |
13969 | 0 | section, |
13970 | 0 | irela->r_offset); |
13971 | 0 | if (r_offset >= (bfd_vma) -2) |
13972 | 0 | continue; |
13973 | 0 | if (!append_relr_off (htab, section, r_offset)) |
13974 | 0 | goto error_ret_free_internal; |
13975 | 0 | continue; |
13976 | 0 | } |
13977 | | |
13978 | 0 | hash = ppc_elf_hash_entry (h); |
13979 | 0 | ok_dest = false; |
13980 | 0 | fdh = NULL; |
13981 | 0 | sym_value = 0; |
13982 | 0 | if (hash == NULL) |
13983 | 0 | { |
13984 | 0 | sym_value = sym->st_value; |
13985 | 0 | if (sym_sec != NULL |
13986 | 0 | && sym_sec->output_section != NULL) |
13987 | 0 | ok_dest = true; |
13988 | 0 | } |
13989 | 0 | else if (hash->elf.root.type == bfd_link_hash_defined |
13990 | 0 | || hash->elf.root.type == bfd_link_hash_defweak) |
13991 | 0 | { |
13992 | 0 | sym_value = hash->elf.root.u.def.value; |
13993 | 0 | if (sym_sec->output_section != NULL) |
13994 | 0 | ok_dest = true; |
13995 | 0 | } |
13996 | 0 | else if (hash->elf.root.type == bfd_link_hash_undefweak |
13997 | 0 | || hash->elf.root.type == bfd_link_hash_undefined) |
13998 | 0 | { |
13999 | | /* Recognise an old ABI func code entry sym, and |
14000 | | use the func descriptor sym instead if it is |
14001 | | defined. */ |
14002 | 0 | if (hash->elf.root.root.string[0] == '.' |
14003 | 0 | && hash->oh != NULL) |
14004 | 0 | { |
14005 | 0 | fdh = ppc_follow_link (hash->oh); |
14006 | 0 | if (fdh->elf.root.type == bfd_link_hash_defined |
14007 | 0 | || fdh->elf.root.type == bfd_link_hash_defweak) |
14008 | 0 | { |
14009 | 0 | sym_sec = fdh->elf.root.u.def.section; |
14010 | 0 | sym_value = fdh->elf.root.u.def.value; |
14011 | 0 | if (sym_sec->output_section != NULL) |
14012 | 0 | ok_dest = true; |
14013 | 0 | } |
14014 | 0 | else |
14015 | 0 | fdh = NULL; |
14016 | 0 | } |
14017 | 0 | } |
14018 | 0 | else |
14019 | 0 | { |
14020 | 0 | bfd_set_error (bfd_error_bad_value); |
14021 | 0 | goto error_ret_free_internal; |
14022 | 0 | } |
14023 | | |
14024 | 0 | destination = 0; |
14025 | 0 | local_off = 0; |
14026 | 0 | if (ok_dest) |
14027 | 0 | { |
14028 | 0 | sym_value += irela->r_addend; |
14029 | 0 | destination = (sym_value |
14030 | 0 | + sym_sec->output_offset |
14031 | 0 | + sym_sec->output_section->vma); |
14032 | 0 | local_off = PPC64_LOCAL_ENTRY_OFFSET (hash |
14033 | 0 | ? hash->elf.other |
14034 | 0 | : sym->st_other); |
14035 | 0 | } |
14036 | |
|
14037 | 0 | code_sec = sym_sec; |
14038 | 0 | code_value = sym_value; |
14039 | 0 | opd = get_opd_info (sym_sec); |
14040 | 0 | if (opd != NULL) |
14041 | 0 | { |
14042 | 0 | bfd_vma dest; |
14043 | |
|
14044 | 0 | if (hash == NULL && opd->adjust != NULL) |
14045 | 0 | { |
14046 | 0 | long adjust = opd->adjust[OPD_NDX (sym_value)]; |
14047 | 0 | if (adjust == -1) |
14048 | 0 | continue; |
14049 | 0 | code_value += adjust; |
14050 | 0 | sym_value += adjust; |
14051 | 0 | } |
14052 | 0 | dest = opd_entry_value (sym_sec, sym_value, |
14053 | 0 | &code_sec, &code_value, false); |
14054 | 0 | if (dest != (bfd_vma) -1) |
14055 | 0 | { |
14056 | 0 | destination = dest; |
14057 | 0 | if (fdh != NULL) |
14058 | 0 | { |
14059 | | /* Fixup old ABI sym to point at code |
14060 | | entry. */ |
14061 | 0 | hash->elf.root.type = bfd_link_hash_defweak; |
14062 | 0 | hash->elf.root.u.def.section = code_sec; |
14063 | 0 | hash->elf.root.u.def.value = code_value; |
14064 | 0 | } |
14065 | 0 | } |
14066 | 0 | } |
14067 | | |
14068 | | /* Determine what (if any) linker stub is needed. */ |
14069 | 0 | plt_ent = NULL; |
14070 | 0 | stub_type.main = ppc_type_of_stub (section, irela, &hash, |
14071 | 0 | &plt_ent, destination, |
14072 | 0 | local_off); |
14073 | 0 | stub_type.sub = ppc_stub_toc; |
14074 | 0 | stub_type.r2save = 0; |
14075 | |
|
14076 | 0 | if (r_type == R_PPC64_REL24_NOTOC |
14077 | 0 | || r_type == R_PPC64_REL24_P9NOTOC) |
14078 | 0 | { |
14079 | 0 | enum ppc_stub_sub_type notoc = ppc_stub_notoc; |
14080 | 0 | if (htab->params->power10_stubs == 0 |
14081 | 0 | || (r_type == R_PPC64_REL24_P9NOTOC |
14082 | 0 | && htab->params->power10_stubs != 1)) |
14083 | 0 | notoc = ppc_stub_p9notoc; |
14084 | 0 | if (stub_type.main == ppc_stub_plt_call) |
14085 | 0 | stub_type.sub = notoc; |
14086 | 0 | else if (stub_type.main == ppc_stub_long_branch |
14087 | 0 | || (code_sec != NULL |
14088 | 0 | && code_sec->output_section != NULL |
14089 | 0 | && (((hash ? hash->elf.other : sym->st_other) |
14090 | 0 | & STO_PPC64_LOCAL_MASK) |
14091 | 0 | > 1 << STO_PPC64_LOCAL_BIT))) |
14092 | 0 | { |
14093 | 0 | stub_type.main = ppc_stub_long_branch; |
14094 | 0 | stub_type.sub = notoc; |
14095 | 0 | stub_type.r2save = 0; |
14096 | 0 | } |
14097 | 0 | } |
14098 | 0 | else if (stub_type.main != ppc_stub_plt_call) |
14099 | 0 | { |
14100 | | /* Check whether we need a TOC adjusting stub. |
14101 | | Since the linker pastes together pieces from |
14102 | | different object files when creating the |
14103 | | _init and _fini functions, it may be that a |
14104 | | call to what looks like a local sym is in |
14105 | | fact a call needing a TOC adjustment. */ |
14106 | 0 | if ((code_sec != NULL |
14107 | 0 | && code_sec->output_section != NULL |
14108 | 0 | && (code_sec->has_toc_reloc |
14109 | 0 | || code_sec->makes_toc_func_call) |
14110 | 0 | && (htab->sec_info[code_sec->id].toc_off |
14111 | 0 | != htab->sec_info[section->id].toc_off)) |
14112 | 0 | || (((hash ? hash->elf.other : sym->st_other) |
14113 | 0 | & STO_PPC64_LOCAL_MASK) |
14114 | 0 | == 1 << STO_PPC64_LOCAL_BIT)) |
14115 | 0 | { |
14116 | 0 | stub_type.main = ppc_stub_long_branch; |
14117 | 0 | stub_type.sub = ppc_stub_toc; |
14118 | 0 | stub_type.r2save = 1; |
14119 | 0 | } |
14120 | 0 | } |
14121 | |
|
14122 | 0 | if (stub_type.main == ppc_stub_none) |
14123 | 0 | continue; |
14124 | | |
14125 | | /* __tls_get_addr calls might be eliminated. */ |
14126 | 0 | if (stub_type.main != ppc_stub_plt_call |
14127 | 0 | && hash != NULL |
14128 | 0 | && is_tls_get_addr (&hash->elf, htab) |
14129 | 0 | && section->has_tls_reloc |
14130 | 0 | && irela != internal_relocs) |
14131 | 0 | { |
14132 | | /* Get tls info. */ |
14133 | 0 | unsigned char *tls_mask; |
14134 | |
|
14135 | 0 | if (!get_tls_mask (&tls_mask, NULL, NULL, &local_syms, |
14136 | 0 | irela - 1, input_bfd)) |
14137 | 0 | goto error_ret_free_internal; |
14138 | 0 | if ((*tls_mask & TLS_TLS) != 0 |
14139 | 0 | && (*tls_mask & (TLS_GD | TLS_LD)) == 0) |
14140 | 0 | continue; |
14141 | 0 | } |
14142 | | |
14143 | 0 | if (stub_type.main == ppc_stub_plt_call |
14144 | 0 | && stub_type.sub == ppc_stub_toc) |
14145 | 0 | { |
14146 | 0 | if (!htab->opd_abi |
14147 | 0 | && htab->params->plt_localentry0 != 0 |
14148 | 0 | && is_elfv2_localentry0 (&hash->elf)) |
14149 | 0 | htab->has_plt_localentry0 = 1; |
14150 | 0 | else if (irela + 1 < irelaend |
14151 | 0 | && irela[1].r_offset == irela->r_offset + 4 |
14152 | 0 | && (ELF64_R_TYPE (irela[1].r_info) |
14153 | 0 | == R_PPC64_TOCSAVE)) |
14154 | 0 | { |
14155 | 0 | if (!tocsave_find (htab, INSERT, |
14156 | 0 | &local_syms, irela + 1, input_bfd)) |
14157 | 0 | goto error_ret_free_internal; |
14158 | 0 | } |
14159 | 0 | else |
14160 | 0 | stub_type.r2save = 1; |
14161 | 0 | } |
14162 | | |
14163 | | /* Support for grouping stub sections. */ |
14164 | 0 | id_sec = htab->sec_info[section->id].u.group->link_sec; |
14165 | | |
14166 | | /* Get the name of this stub. */ |
14167 | 0 | stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); |
14168 | 0 | if (!stub_name) |
14169 | 0 | goto error_ret_free_internal; |
14170 | | |
14171 | 0 | stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
14172 | 0 | stub_name, false, false); |
14173 | 0 | if (stub_entry != NULL) |
14174 | 0 | { |
14175 | 0 | free (stub_name); |
14176 | 0 | if (!ppc_merge_stub (htab, stub_entry, stub_type, r_type)) |
14177 | 0 | { |
14178 | | /* xgettext:c-format */ |
14179 | 0 | _bfd_error_handler |
14180 | 0 | (_("%pB: cannot create stub entry %s"), |
14181 | 0 | section->owner, stub_entry->root.string); |
14182 | 0 | goto error_ret_free_internal; |
14183 | 0 | } |
14184 | 0 | continue; |
14185 | 0 | } |
14186 | | |
14187 | 0 | stub_entry = ppc_add_stub (stub_name, section, info); |
14188 | 0 | free (stub_name); |
14189 | 0 | if (stub_entry == NULL) |
14190 | 0 | { |
14191 | 0 | error_ret_free_internal: |
14192 | 0 | if (elf_section_data (section)->relocs == NULL) |
14193 | 0 | free (internal_relocs); |
14194 | 0 | error_ret_free_local: |
14195 | 0 | if (symtab_hdr->contents |
14196 | 0 | != (unsigned char *) local_syms) |
14197 | 0 | free (local_syms); |
14198 | 0 | return false; |
14199 | 0 | } |
14200 | | |
14201 | 0 | stub_entry->type = stub_type; |
14202 | 0 | if (stub_type.main == ppc_stub_plt_call) |
14203 | 0 | { |
14204 | 0 | stub_entry->target_value = sym_value; |
14205 | 0 | stub_entry->target_section = sym_sec; |
14206 | 0 | } |
14207 | 0 | else |
14208 | 0 | { |
14209 | 0 | stub_entry->target_value = code_value; |
14210 | 0 | stub_entry->target_section = code_sec; |
14211 | 0 | } |
14212 | 0 | stub_entry->h = hash; |
14213 | 0 | stub_entry->plt_ent = plt_ent; |
14214 | 0 | stub_entry->symtype |
14215 | 0 | = hash ? hash->elf.type : ELF_ST_TYPE (sym->st_info); |
14216 | 0 | stub_entry->other = hash ? hash->elf.other : sym->st_other; |
14217 | |
|
14218 | 0 | if (hash != NULL |
14219 | 0 | && (hash->elf.root.type == bfd_link_hash_defined |
14220 | 0 | || hash->elf.root.type == bfd_link_hash_defweak)) |
14221 | 0 | htab->stub_globals += 1; |
14222 | 0 | } |
14223 | | |
14224 | | /* We're done with the internal relocs, free them. */ |
14225 | 0 | if (elf_section_data (section)->relocs != internal_relocs) |
14226 | 0 | free (internal_relocs); |
14227 | 0 | } |
14228 | | |
14229 | 0 | if (local_syms != NULL |
14230 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
14231 | 0 | { |
14232 | 0 | if (!info->keep_memory) |
14233 | 0 | free (local_syms); |
14234 | 0 | else |
14235 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
14236 | 0 | } |
14237 | 0 | } |
14238 | | |
14239 | | /* We may have added some stubs. Find out the new size of the |
14240 | | stub sections. */ |
14241 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14242 | 0 | { |
14243 | 0 | group->lr_restore = 0; |
14244 | 0 | group->eh_size = 0; |
14245 | 0 | if (group->stub_sec != NULL) |
14246 | 0 | { |
14247 | 0 | asection *stub_sec = group->stub_sec; |
14248 | |
|
14249 | 0 | stub_sec->rawsize = stub_sec->size; |
14250 | 0 | stub_sec->size = 0; |
14251 | 0 | stub_sec->reloc_count = 0; |
14252 | 0 | stub_sec->flags &= ~SEC_RELOC; |
14253 | 0 | } |
14254 | 0 | } |
14255 | 0 | if (htab->tga_group != NULL) |
14256 | 0 | { |
14257 | | /* See emit_tga_desc and emit_tga_desc_eh_frame. */ |
14258 | 0 | htab->tga_group->eh_size |
14259 | 0 | = 1 + 2 + (htab->opd_abi != 0) + 3 + 8 * 2 + 3 + 8 + 3; |
14260 | 0 | htab->tga_group->lr_restore = 23 * 4; |
14261 | 0 | htab->tga_group->stub_sec->size = 24 * 4; |
14262 | 0 | } |
14263 | |
|
14264 | 0 | htab->brlt->rawsize = htab->brlt->size; |
14265 | 0 | htab->brlt->size = 0; |
14266 | 0 | htab->brlt->reloc_count = 0; |
14267 | 0 | htab->brlt->flags &= ~SEC_RELOC; |
14268 | 0 | if (htab->relbrlt != NULL) |
14269 | 0 | htab->relbrlt->size = 0; |
14270 | |
|
14271 | 0 | if (htab->elf.srelrdyn != NULL) |
14272 | 0 | { |
14273 | 0 | htab->elf.srelrdyn->rawsize = htab->elf.srelrdyn->size; |
14274 | 0 | htab->elf.srelrdyn->size = 0; |
14275 | 0 | } |
14276 | |
|
14277 | 0 | htab->stub_changed = false; |
14278 | 0 | htab->stub_id = 0; |
14279 | 0 | bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, info); |
14280 | |
|
14281 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14282 | 0 | if (group->needs_save_res) |
14283 | 0 | group->stub_sec->size += htab->sfpr->size; |
14284 | |
|
14285 | 0 | if (info->emitrelocations |
14286 | 0 | && htab->glink != NULL && htab->glink->size != 0) |
14287 | 0 | { |
14288 | 0 | htab->glink->reloc_count = 1; |
14289 | 0 | htab->glink->flags |= SEC_RELOC; |
14290 | 0 | } |
14291 | |
|
14292 | 0 | if (htab->glink_eh_frame != NULL |
14293 | 0 | && !bfd_is_abs_section (htab->glink_eh_frame->output_section) |
14294 | 0 | && htab->glink_eh_frame->output_section->size > 8) |
14295 | 0 | { |
14296 | 0 | size_t size = 0, align = 4; |
14297 | |
|
14298 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14299 | 0 | if (group->eh_size != 0) |
14300 | 0 | size += (group->eh_size + 17 + align - 1) & -align; |
14301 | 0 | if (htab->glink != NULL && htab->glink->size != 0) |
14302 | 0 | size += (24 + align - 1) & -align; |
14303 | 0 | if (size != 0) |
14304 | 0 | size += (sizeof (glink_eh_frame_cie) + align - 1) & -align; |
14305 | 0 | align = 1ul << htab->glink_eh_frame->output_section->alignment_power; |
14306 | 0 | size = (size + align - 1) & -align; |
14307 | 0 | htab->glink_eh_frame->rawsize = htab->glink_eh_frame->size; |
14308 | 0 | htab->glink_eh_frame->size = size; |
14309 | 0 | } |
14310 | |
|
14311 | 0 | if (htab->params->plt_stub_align != 0) |
14312 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14313 | 0 | if (group->stub_sec != NULL) |
14314 | 0 | { |
14315 | 0 | int align = abs (htab->params->plt_stub_align); |
14316 | 0 | group->stub_sec->size |
14317 | 0 | = (group->stub_sec->size + (1 << align) - 1) & -(1 << align); |
14318 | 0 | } |
14319 | |
|
14320 | 0 | if (htab->elf.srelrdyn != NULL) |
14321 | 0 | { |
14322 | 0 | bfd_vma r_offset; |
14323 | |
|
14324 | 0 | for (r_offset = 0; r_offset < htab->brlt->size; r_offset += 8) |
14325 | 0 | if (!append_relr_off (htab, htab->brlt, r_offset)) |
14326 | 0 | return false; |
14327 | | |
14328 | 0 | if (!got_and_plt_relr_for_local_syms (info)) |
14329 | 0 | return false; |
14330 | 0 | elf_link_hash_traverse (&htab->elf, got_and_plt_relr, info); |
14331 | 0 | if (htab->stub_error) |
14332 | 0 | return false; |
14333 | | |
14334 | 0 | bfd_vma *relr_addr = sort_relr (htab); |
14335 | 0 | if (htab->relr_count != 0 && relr_addr == NULL) |
14336 | 0 | return false; |
14337 | | |
14338 | 0 | size_t i = 0; |
14339 | 0 | while (i < htab->relr_count) |
14340 | 0 | { |
14341 | 0 | bfd_vma base = relr_addr[i]; |
14342 | 0 | htab->elf.srelrdyn->size += 8; |
14343 | 0 | i++; |
14344 | | /* Handle possible duplicate address. This can happen |
14345 | | as sections increase in size when adding stubs. */ |
14346 | 0 | while (i < htab->relr_count |
14347 | 0 | && relr_addr[i] == base) |
14348 | 0 | i++; |
14349 | 0 | base += 8; |
14350 | 0 | while (1) |
14351 | 0 | { |
14352 | 0 | size_t start_i = i; |
14353 | 0 | while (i < htab->relr_count |
14354 | 0 | && relr_addr[i] - base < 63 * 8 |
14355 | 0 | && (relr_addr[i] - base) % 8 == 0) |
14356 | 0 | i++; |
14357 | 0 | if (i == start_i) |
14358 | 0 | break; |
14359 | 0 | htab->elf.srelrdyn->size += 8; |
14360 | 0 | base += 63 * 8; |
14361 | 0 | } |
14362 | 0 | } |
14363 | 0 | free (relr_addr); |
14364 | 0 | } |
14365 | | |
14366 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14367 | 0 | if (group->stub_sec != NULL |
14368 | 0 | && group->stub_sec->rawsize != group->stub_sec->size |
14369 | 0 | && (htab->stub_iteration <= STUB_SHRINK_ITER |
14370 | 0 | || group->stub_sec->rawsize < group->stub_sec->size)) |
14371 | 0 | break; |
14372 | |
|
14373 | 0 | if (group == NULL |
14374 | 0 | && (!htab->stub_changed |
14375 | 0 | || htab->stub_iteration > STUB_SHRINK_ITER) |
14376 | 0 | && (htab->brlt->rawsize == htab->brlt->size |
14377 | 0 | || (htab->stub_iteration > STUB_SHRINK_ITER |
14378 | 0 | && htab->brlt->rawsize > htab->brlt->size)) |
14379 | 0 | && (htab->elf.srelrdyn == NULL |
14380 | 0 | || htab->elf.srelrdyn->rawsize == htab->elf.srelrdyn->size |
14381 | 0 | || (htab->stub_iteration > STUB_SHRINK_ITER |
14382 | 0 | && htab->elf.srelrdyn->rawsize > htab->elf.srelrdyn->size)) |
14383 | 0 | && (htab->glink_eh_frame == NULL |
14384 | 0 | || htab->glink_eh_frame->rawsize == htab->glink_eh_frame->size) |
14385 | 0 | && (htab->tga_group == NULL |
14386 | 0 | || htab->stub_iteration > 1)) |
14387 | 0 | break; |
14388 | | |
14389 | 0 | if (htab->stub_iteration > STUB_SHRINK_ITER) |
14390 | 0 | { |
14391 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14392 | 0 | if (group->stub_sec != NULL |
14393 | 0 | && group->stub_sec->size < group->stub_sec->rawsize) |
14394 | 0 | group->stub_sec->size = group->stub_sec->rawsize; |
14395 | |
|
14396 | 0 | if (htab->brlt->size < htab->brlt->rawsize) |
14397 | 0 | htab->brlt->size = htab->brlt->rawsize; |
14398 | |
|
14399 | 0 | if (htab->elf.srelrdyn != NULL |
14400 | 0 | && htab->elf.srelrdyn->size < htab->elf.srelrdyn->rawsize) |
14401 | 0 | htab->elf.srelrdyn->size = htab->elf.srelrdyn->rawsize; |
14402 | 0 | } |
14403 | | |
14404 | | /* Ask the linker to do its stuff. */ |
14405 | 0 | (*htab->params->layout_sections_again) (); |
14406 | 0 | } |
14407 | | |
14408 | 0 | if (htab->glink_eh_frame != NULL |
14409 | 0 | && htab->glink_eh_frame->size != 0) |
14410 | 0 | { |
14411 | 0 | bfd_vma val; |
14412 | 0 | bfd_byte *p, *last_fde; |
14413 | 0 | size_t last_fde_len, size, align, pad; |
14414 | 0 | struct map_stub *group; |
14415 | | |
14416 | | /* It is necessary to at least have a rough outline of the |
14417 | | linker generated CIEs and FDEs written before |
14418 | | bfd_elf_discard_info is run, in order for these FDEs to be |
14419 | | indexed in .eh_frame_hdr. */ |
14420 | 0 | p = bfd_zalloc (htab->glink_eh_frame->owner, htab->glink_eh_frame->size); |
14421 | 0 | if (p == NULL) |
14422 | 0 | return false; |
14423 | 0 | htab->glink_eh_frame->contents = p; |
14424 | 0 | htab->glink_eh_frame->alloced = 1; |
14425 | 0 | last_fde = p; |
14426 | 0 | align = 4; |
14427 | |
|
14428 | 0 | memcpy (p, glink_eh_frame_cie, sizeof (glink_eh_frame_cie)); |
14429 | | /* CIE length (rewrite in case little-endian). */ |
14430 | 0 | last_fde_len = ((sizeof (glink_eh_frame_cie) + align - 1) & -align) - 4; |
14431 | 0 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
14432 | 0 | p += last_fde_len + 4; |
14433 | |
|
14434 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14435 | 0 | if (group->eh_size != 0) |
14436 | 0 | { |
14437 | 0 | group->eh_base = p - htab->glink_eh_frame->contents; |
14438 | 0 | last_fde = p; |
14439 | 0 | last_fde_len = ((group->eh_size + 17 + align - 1) & -align) - 4; |
14440 | | /* FDE length. */ |
14441 | 0 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
14442 | 0 | p += 4; |
14443 | | /* CIE pointer. */ |
14444 | 0 | val = p - htab->glink_eh_frame->contents; |
14445 | 0 | bfd_put_32 (htab->elf.dynobj, val, p); |
14446 | 0 | p += 4; |
14447 | | /* Offset to stub section, written later. */ |
14448 | 0 | p += 4; |
14449 | | /* stub section size. */ |
14450 | 0 | bfd_put_32 (htab->elf.dynobj, group->stub_sec->size, p); |
14451 | 0 | p += 4; |
14452 | | /* Augmentation. */ |
14453 | 0 | p += 1; |
14454 | | /* Make sure we don't have all nops. This is enough for |
14455 | | elf-eh-frame.c to detect the last non-nop opcode. */ |
14456 | 0 | p[group->eh_size - 1] = DW_CFA_advance_loc + 1; |
14457 | 0 | p = last_fde + last_fde_len + 4; |
14458 | 0 | } |
14459 | 0 | if (htab->glink != NULL && htab->glink->size != 0) |
14460 | 0 | { |
14461 | 0 | last_fde = p; |
14462 | 0 | last_fde_len = ((24 + align - 1) & -align) - 4; |
14463 | | /* FDE length. */ |
14464 | 0 | bfd_put_32 (htab->elf.dynobj, last_fde_len, p); |
14465 | 0 | p += 4; |
14466 | | /* CIE pointer. */ |
14467 | 0 | val = p - htab->glink_eh_frame->contents; |
14468 | 0 | bfd_put_32 (htab->elf.dynobj, val, p); |
14469 | 0 | p += 4; |
14470 | | /* Offset to .glink, written later. */ |
14471 | 0 | p += 4; |
14472 | | /* .glink size. */ |
14473 | 0 | bfd_put_32 (htab->elf.dynobj, htab->glink->size - 8, p); |
14474 | 0 | p += 4; |
14475 | | /* Augmentation. */ |
14476 | 0 | p += 1; |
14477 | |
|
14478 | 0 | *p++ = DW_CFA_advance_loc + (htab->has_plt_localentry0 ? 3 : 2); |
14479 | 0 | *p++ = DW_CFA_register; |
14480 | 0 | *p++ = 65; |
14481 | 0 | *p++ = htab->opd_abi ? 12 : 0; |
14482 | 0 | *p++ = DW_CFA_advance_loc + (htab->opd_abi ? 4 : 2); |
14483 | 0 | *p++ = DW_CFA_restore_extended; |
14484 | 0 | *p++ = 65; |
14485 | 0 | p += ((24 + align - 1) & -align) - 24; |
14486 | 0 | } |
14487 | | /* Subsume any padding into the last FDE if user .eh_frame |
14488 | | sections are aligned more than glink_eh_frame. Otherwise any |
14489 | | zero padding will be seen as a terminator. */ |
14490 | 0 | align = 1ul << htab->glink_eh_frame->output_section->alignment_power; |
14491 | 0 | size = p - htab->glink_eh_frame->contents; |
14492 | 0 | pad = ((size + align - 1) & -align) - size; |
14493 | 0 | htab->glink_eh_frame->size = size + pad; |
14494 | 0 | bfd_put_32 (htab->elf.dynobj, last_fde_len + pad, last_fde); |
14495 | 0 | } |
14496 | | |
14497 | 0 | maybe_strip_output (info, htab->brlt); |
14498 | 0 | if (htab->relbrlt != NULL) |
14499 | 0 | maybe_strip_output (info, htab->relbrlt); |
14500 | 0 | if (htab->glink_eh_frame != NULL) |
14501 | 0 | maybe_strip_output (info, htab->glink_eh_frame); |
14502 | 0 | if (htab->elf.srelrdyn != NULL) |
14503 | 0 | maybe_strip_output (info, htab->elf.srelrdyn); |
14504 | |
|
14505 | 0 | return true; |
14506 | 0 | } |
14507 | | |
14508 | | /* Called after we have determined section placement. If sections |
14509 | | move, we'll be called again. Provide a value for TOCstart. */ |
14510 | | |
14511 | | bfd_vma |
14512 | | ppc64_elf_set_toc (struct bfd_link_info *info, bfd *obfd) |
14513 | 25 | { |
14514 | 25 | asection *s; |
14515 | 25 | bfd_vma TOCstart, adjust; |
14516 | | |
14517 | 25 | if (info != NULL) |
14518 | 0 | { |
14519 | 0 | struct elf_link_hash_entry *h; |
14520 | 0 | struct elf_link_hash_table *htab = elf_hash_table (info); |
14521 | |
|
14522 | 0 | if (is_elf_hash_table (&htab->root) |
14523 | 0 | && htab->hgot != NULL) |
14524 | 0 | h = htab->hgot; |
14525 | 0 | else |
14526 | 0 | { |
14527 | 0 | h = (struct elf_link_hash_entry *) |
14528 | 0 | bfd_link_hash_lookup (&htab->root, ".TOC.", false, false, true); |
14529 | 0 | if (is_elf_hash_table (&htab->root)) |
14530 | 0 | htab->hgot = h; |
14531 | 0 | } |
14532 | 0 | if (h != NULL |
14533 | 0 | && h->root.type == bfd_link_hash_defined |
14534 | 0 | && !h->root.linker_def |
14535 | 0 | && (!is_elf_hash_table (&htab->root) |
14536 | 0 | || h->def_regular)) |
14537 | 0 | { |
14538 | 0 | TOCstart = defined_sym_val (h) - TOC_BASE_OFF; |
14539 | 0 | _bfd_set_gp_value (obfd, TOCstart); |
14540 | 0 | return TOCstart; |
14541 | 0 | } |
14542 | 0 | } |
14543 | | |
14544 | | /* The TOC consists of sections .got, .toc, .tocbss, .plt in that |
14545 | | order. The TOC starts where the first of these sections starts. */ |
14546 | 25 | s = bfd_get_section_by_name (obfd, ".got"); |
14547 | 25 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
14548 | 25 | s = bfd_get_section_by_name (obfd, ".toc"); |
14549 | 25 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
14550 | 25 | s = bfd_get_section_by_name (obfd, ".tocbss"); |
14551 | 25 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
14552 | 25 | s = bfd_get_section_by_name (obfd, ".plt"); |
14553 | 25 | if (s == NULL || (s->flags & SEC_EXCLUDE) != 0) |
14554 | 25 | { |
14555 | | /* This may happen for |
14556 | | o references to TOC base (SYM@toc / TOC[tc0]) without a |
14557 | | .toc directive |
14558 | | o bad linker script |
14559 | | o --gc-sections and empty TOC sections |
14560 | | |
14561 | | FIXME: Warn user? */ |
14562 | | |
14563 | | /* Look for a likely section. We probably won't even be |
14564 | | using TOCstart. */ |
14565 | 499 | for (s = obfd->sections; s != NULL; s = s->next) |
14566 | 474 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY |
14567 | 474 | | SEC_EXCLUDE)) |
14568 | 474 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
14569 | 0 | break; |
14570 | 25 | if (s == NULL) |
14571 | 499 | for (s = obfd->sections; s != NULL; s = s->next) |
14572 | 474 | if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_EXCLUDE)) |
14573 | 474 | == (SEC_ALLOC | SEC_SMALL_DATA)) |
14574 | 0 | break; |
14575 | 25 | if (s == NULL) |
14576 | 39 | for (s = obfd->sections; s != NULL; s = s->next) |
14577 | 39 | if ((s->flags & (SEC_ALLOC | SEC_READONLY | SEC_EXCLUDE)) |
14578 | 39 | == SEC_ALLOC) |
14579 | 25 | break; |
14580 | 25 | if (s == NULL) |
14581 | 0 | for (s = obfd->sections; s != NULL; s = s->next) |
14582 | 0 | if ((s->flags & (SEC_ALLOC | SEC_EXCLUDE)) == SEC_ALLOC) |
14583 | 0 | break; |
14584 | 25 | } |
14585 | | |
14586 | 25 | TOCstart = 0; |
14587 | 25 | if (s != NULL) |
14588 | 25 | TOCstart = s->output_section->vma + s->output_offset; |
14589 | | |
14590 | | /* Force alignment. */ |
14591 | 25 | adjust = TOCstart & (TOC_BASE_ALIGN - 1); |
14592 | 25 | TOCstart -= adjust; |
14593 | 25 | _bfd_set_gp_value (obfd, TOCstart); |
14594 | | |
14595 | 25 | if (info != NULL && s != NULL) |
14596 | 0 | { |
14597 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
14598 | |
|
14599 | 0 | if (htab != NULL) |
14600 | 0 | { |
14601 | 0 | if (htab->elf.hgot != NULL) |
14602 | 0 | { |
14603 | 0 | htab->elf.hgot->root.u.def.value = TOC_BASE_OFF - adjust; |
14604 | 0 | htab->elf.hgot->root.u.def.section = s; |
14605 | 0 | } |
14606 | 0 | } |
14607 | 0 | else |
14608 | 0 | { |
14609 | 0 | struct bfd_link_hash_entry *bh = NULL; |
14610 | 0 | _bfd_generic_link_add_one_symbol (info, obfd, ".TOC.", BSF_GLOBAL, |
14611 | 0 | s, TOC_BASE_OFF - adjust, |
14612 | 0 | NULL, false, false, &bh); |
14613 | 0 | } |
14614 | 0 | } |
14615 | 25 | return TOCstart; |
14616 | 25 | } |
14617 | | |
14618 | | /* Called via elf_link_hash_traverse from ppc64_elf_build_stubs to |
14619 | | write out any global entry stubs, and PLT relocations. */ |
14620 | | |
14621 | | static bool |
14622 | | build_global_entry_stubs_and_plt (struct elf_link_hash_entry *h, void *inf) |
14623 | 0 | { |
14624 | 0 | struct bfd_link_info *info; |
14625 | 0 | struct ppc_link_hash_table *htab; |
14626 | 0 | struct plt_entry *ent; |
14627 | 0 | asection *s; |
14628 | |
|
14629 | 0 | if (h->root.type == bfd_link_hash_indirect) |
14630 | 0 | return true; |
14631 | | |
14632 | 0 | info = inf; |
14633 | 0 | htab = ppc_hash_table (info); |
14634 | 0 | if (htab == NULL) |
14635 | 0 | return false; |
14636 | | |
14637 | 0 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
14638 | 0 | if (ent->plt.offset != (bfd_vma) -1) |
14639 | 0 | { |
14640 | | /* This symbol has an entry in the procedure linkage |
14641 | | table. Set it up. */ |
14642 | 0 | Elf_Internal_Rela rela; |
14643 | 0 | asection *plt, *relplt; |
14644 | 0 | bfd_byte *loc; |
14645 | |
|
14646 | 0 | if (use_local_plt (info, h)) |
14647 | 0 | { |
14648 | 0 | if (!(h->def_regular |
14649 | 0 | && (h->root.type == bfd_link_hash_defined |
14650 | 0 | || h->root.type == bfd_link_hash_defweak))) |
14651 | 0 | continue; |
14652 | 0 | if (h->type == STT_GNU_IFUNC) |
14653 | 0 | { |
14654 | 0 | plt = htab->elf.iplt; |
14655 | 0 | relplt = htab->elf.irelplt; |
14656 | 0 | htab->elf.ifunc_resolvers = true; |
14657 | 0 | if (htab->opd_abi) |
14658 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); |
14659 | 0 | else |
14660 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
14661 | 0 | } |
14662 | 0 | else |
14663 | 0 | { |
14664 | 0 | plt = htab->pltlocal; |
14665 | 0 | relplt = NULL; |
14666 | 0 | if (bfd_link_pic (info) |
14667 | 0 | && !(info->enable_dt_relr && !htab->opd_abi)) |
14668 | 0 | { |
14669 | 0 | relplt = htab->relpltlocal; |
14670 | 0 | if (htab->opd_abi) |
14671 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT); |
14672 | 0 | else |
14673 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
14674 | 0 | } |
14675 | 0 | } |
14676 | 0 | rela.r_addend = defined_sym_val (h) + ent->addend; |
14677 | |
|
14678 | 0 | if (relplt == NULL) |
14679 | 0 | { |
14680 | 0 | loc = plt->contents + ent->plt.offset; |
14681 | 0 | bfd_put_64 (info->output_bfd, rela.r_addend, loc); |
14682 | 0 | if (htab->opd_abi) |
14683 | 0 | { |
14684 | 0 | bfd_vma toc = elf_gp (info->output_bfd); |
14685 | 0 | toc += htab->sec_info[h->root.u.def.section->id].toc_off; |
14686 | 0 | bfd_put_64 (info->output_bfd, toc, loc + 8); |
14687 | 0 | } |
14688 | 0 | } |
14689 | 0 | else |
14690 | 0 | { |
14691 | 0 | rela.r_offset = (plt->output_section->vma |
14692 | 0 | + plt->output_offset |
14693 | 0 | + ent->plt.offset); |
14694 | 0 | BFD_ASSERT (count_and_swap_reloc_out (info->output_bfd, &rela, |
14695 | 0 | relplt)); |
14696 | 0 | } |
14697 | 0 | } |
14698 | 0 | else |
14699 | 0 | { |
14700 | 0 | rela.r_offset = (htab->elf.splt->output_section->vma |
14701 | 0 | + htab->elf.splt->output_offset |
14702 | 0 | + ent->plt.offset); |
14703 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); |
14704 | 0 | rela.r_addend = ent->addend; |
14705 | 0 | loc = (htab->elf.srelplt->contents |
14706 | 0 | + ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE (htab)) |
14707 | 0 | / PLT_ENTRY_SIZE (htab) * sizeof (Elf64_External_Rela))); |
14708 | 0 | if (h->type == STT_GNU_IFUNC && is_static_defined (h)) |
14709 | 0 | htab->elf.ifunc_resolvers = true; |
14710 | 0 | BFD_ASSERT (swap_reloc_out (info->output_bfd, &rela, |
14711 | 0 | loc, htab->elf.srelplt)); |
14712 | 0 | } |
14713 | 0 | } |
14714 | |
|
14715 | 0 | if (!h->pointer_equality_needed) |
14716 | 0 | return true; |
14717 | | |
14718 | 0 | if (h->def_regular) |
14719 | 0 | return true; |
14720 | | |
14721 | 0 | s = htab->global_entry; |
14722 | 0 | if (s == NULL || s->size == 0) |
14723 | 0 | return true; |
14724 | | |
14725 | 0 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
14726 | 0 | if (ent->plt.offset != (bfd_vma) -1 |
14727 | 0 | && ent->addend == 0) |
14728 | 0 | { |
14729 | 0 | bfd_byte *p; |
14730 | 0 | asection *plt; |
14731 | 0 | bfd_vma off; |
14732 | |
|
14733 | 0 | p = s->contents + h->root.u.def.value; |
14734 | 0 | plt = htab->elf.splt; |
14735 | 0 | if (use_local_plt (info, h)) |
14736 | 0 | { |
14737 | 0 | if (h->type == STT_GNU_IFUNC) |
14738 | 0 | plt = htab->elf.iplt; |
14739 | 0 | else |
14740 | 0 | plt = htab->pltlocal; |
14741 | 0 | } |
14742 | 0 | off = ent->plt.offset + plt->output_offset + plt->output_section->vma; |
14743 | 0 | off -= h->root.u.def.value + s->output_offset + s->output_section->vma; |
14744 | |
|
14745 | 0 | if (off + 0x80008000 > 0xffffffff || (off & 3) != 0) |
14746 | 0 | { |
14747 | 0 | info->callbacks->einfo |
14748 | 0 | (_("%P: linkage table error against `%pT'\n"), |
14749 | 0 | h->root.root.string); |
14750 | 0 | bfd_set_error (bfd_error_bad_value); |
14751 | 0 | htab->stub_error = true; |
14752 | 0 | } |
14753 | |
|
14754 | 0 | htab->stub_count[ppc_stub_global_entry - 1] += 1; |
14755 | 0 | if (htab->params->emit_stub_syms) |
14756 | 0 | { |
14757 | 0 | size_t len = strlen (h->root.root.string); |
14758 | 0 | char *name = bfd_alloc (info->output_bfd, |
14759 | 0 | sizeof "12345678.global_entry." + len); |
14760 | |
|
14761 | 0 | if (name == NULL) |
14762 | 0 | return false; |
14763 | | |
14764 | 0 | sprintf (name, "%08x.global_entry.%s", s->id, h->root.root.string); |
14765 | 0 | h = elf_link_hash_lookup (&htab->elf, name, true, false, false); |
14766 | 0 | if (h == NULL) |
14767 | 0 | return false; |
14768 | 0 | if (h->root.type == bfd_link_hash_new) |
14769 | 0 | { |
14770 | 0 | h->root.type = bfd_link_hash_defined; |
14771 | 0 | h->root.u.def.section = s; |
14772 | 0 | h->root.u.def.value = p - s->contents; |
14773 | 0 | h->ref_regular = 1; |
14774 | 0 | h->def_regular = 1; |
14775 | 0 | h->ref_regular_nonweak = 1; |
14776 | 0 | h->forced_local = 1; |
14777 | 0 | h->non_elf = 0; |
14778 | 0 | h->root.linker_def = 1; |
14779 | 0 | } |
14780 | 0 | } |
14781 | | |
14782 | 0 | if (PPC_HA (off) != 0) |
14783 | 0 | { |
14784 | 0 | bfd_put_32 (s->owner, ADDIS_R12_R12 | PPC_HA (off), p); |
14785 | 0 | p += 4; |
14786 | 0 | } |
14787 | 0 | bfd_put_32 (s->owner, LD_R12_0R12 | PPC_LO (off), p); |
14788 | 0 | p += 4; |
14789 | 0 | bfd_put_32 (s->owner, MTCTR_R12, p); |
14790 | 0 | p += 4; |
14791 | 0 | bfd_put_32 (s->owner, BCTR, p); |
14792 | 0 | break; |
14793 | 0 | } |
14794 | 0 | return true; |
14795 | 0 | } |
14796 | | |
14797 | | /* Write PLT relocs for locals. */ |
14798 | | |
14799 | | static bool |
14800 | | write_plt_relocs_for_local_syms (struct bfd_link_info *info) |
14801 | 0 | { |
14802 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
14803 | 0 | bfd *ibfd; |
14804 | |
|
14805 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
14806 | 0 | { |
14807 | 0 | struct got_entry **lgot_ents, **end_lgot_ents; |
14808 | 0 | struct plt_entry **local_plt, **lplt, **end_local_plt; |
14809 | 0 | Elf_Internal_Shdr *symtab_hdr; |
14810 | 0 | bfd_size_type locsymcount; |
14811 | 0 | Elf_Internal_Sym *local_syms = NULL; |
14812 | 0 | struct plt_entry *ent; |
14813 | |
|
14814 | 0 | if (!is_ppc64_elf (ibfd)) |
14815 | 0 | continue; |
14816 | | |
14817 | 0 | lgot_ents = elf_local_got_ents (ibfd); |
14818 | 0 | if (!lgot_ents) |
14819 | 0 | continue; |
14820 | | |
14821 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
14822 | 0 | locsymcount = symtab_hdr->sh_info; |
14823 | 0 | end_lgot_ents = lgot_ents + locsymcount; |
14824 | 0 | local_plt = (struct plt_entry **) end_lgot_ents; |
14825 | 0 | end_local_plt = local_plt + locsymcount; |
14826 | 0 | for (lplt = local_plt; lplt < end_local_plt; ++lplt) |
14827 | 0 | for (ent = *lplt; ent != NULL; ent = ent->next) |
14828 | 0 | if (ent->plt.offset != (bfd_vma) -1) |
14829 | 0 | { |
14830 | 0 | Elf_Internal_Sym *sym; |
14831 | 0 | asection *sym_sec; |
14832 | 0 | asection *plt, *relplt; |
14833 | 0 | bfd_vma val; |
14834 | |
|
14835 | 0 | if (!get_sym_h (NULL, &sym, &sym_sec, NULL, &local_syms, |
14836 | 0 | lplt - local_plt, ibfd)) |
14837 | 0 | { |
14838 | 0 | if (symtab_hdr->contents != (unsigned char *) local_syms) |
14839 | 0 | free (local_syms); |
14840 | 0 | return false; |
14841 | 0 | } |
14842 | | |
14843 | 0 | val = sym->st_value + ent->addend; |
14844 | 0 | if (sym_sec != NULL && sym_sec->output_section != NULL) |
14845 | 0 | val += sym_sec->output_offset + sym_sec->output_section->vma; |
14846 | |
|
14847 | 0 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
14848 | 0 | { |
14849 | 0 | htab->elf.ifunc_resolvers = true; |
14850 | 0 | plt = htab->elf.iplt; |
14851 | 0 | relplt = htab->elf.irelplt; |
14852 | 0 | } |
14853 | 0 | else |
14854 | 0 | { |
14855 | 0 | plt = htab->pltlocal; |
14856 | 0 | relplt = NULL; |
14857 | 0 | if (bfd_link_pic (info) |
14858 | 0 | && !(info->enable_dt_relr && !htab->opd_abi)) |
14859 | 0 | relplt = htab->relpltlocal; |
14860 | 0 | } |
14861 | |
|
14862 | 0 | if (relplt == NULL) |
14863 | 0 | { |
14864 | 0 | bfd_byte *loc = plt->contents + ent->plt.offset; |
14865 | 0 | bfd_put_64 (info->output_bfd, val, loc); |
14866 | 0 | if (htab->opd_abi) |
14867 | 0 | { |
14868 | 0 | bfd_vma toc = elf_gp (ibfd); |
14869 | 0 | bfd_put_64 (info->output_bfd, toc, loc + 8); |
14870 | 0 | } |
14871 | 0 | } |
14872 | 0 | else |
14873 | 0 | { |
14874 | 0 | Elf_Internal_Rela rela; |
14875 | 0 | rela.r_offset = (ent->plt.offset |
14876 | 0 | + plt->output_offset |
14877 | 0 | + plt->output_section->vma); |
14878 | 0 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
14879 | 0 | { |
14880 | 0 | if (htab->opd_abi) |
14881 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_IREL); |
14882 | 0 | else |
14883 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
14884 | 0 | } |
14885 | 0 | else |
14886 | 0 | { |
14887 | 0 | if (htab->opd_abi) |
14888 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_JMP_SLOT); |
14889 | 0 | else |
14890 | 0 | rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
14891 | 0 | } |
14892 | 0 | rela.r_addend = val; |
14893 | 0 | BFD_ASSERT (count_and_swap_reloc_out (info->output_bfd, |
14894 | 0 | &rela, relplt)); |
14895 | 0 | } |
14896 | 0 | } |
14897 | | |
14898 | 0 | if (local_syms != NULL |
14899 | 0 | && symtab_hdr->contents != (unsigned char *) local_syms) |
14900 | 0 | { |
14901 | 0 | if (!info->keep_memory) |
14902 | 0 | free (local_syms); |
14903 | 0 | else |
14904 | 0 | symtab_hdr->contents = (unsigned char *) local_syms; |
14905 | 0 | } |
14906 | 0 | } |
14907 | 0 | return true; |
14908 | 0 | } |
14909 | | |
14910 | | /* Emit the static wrapper function preserving registers around a |
14911 | | __tls_get_addr_opt call. */ |
14912 | | |
14913 | | static bool |
14914 | | emit_tga_desc (struct ppc_link_hash_table *htab) |
14915 | 0 | { |
14916 | 0 | asection *stub_sec = htab->tga_group->stub_sec; |
14917 | 0 | unsigned int cfa_updt = 11 * 4; |
14918 | 0 | bfd_byte *p; |
14919 | 0 | bfd_vma to, from, delta; |
14920 | |
|
14921 | 0 | BFD_ASSERT (htab->tga_desc_fd->elf.root.type == bfd_link_hash_defined |
14922 | 0 | && htab->tga_desc_fd->elf.root.u.def.section == stub_sec |
14923 | 0 | && htab->tga_desc_fd->elf.root.u.def.value == 0); |
14924 | 0 | to = defined_sym_val (&htab->tls_get_addr_fd->elf); |
14925 | 0 | from = defined_sym_val (&htab->tga_desc_fd->elf) + cfa_updt; |
14926 | 0 | delta = to - from; |
14927 | 0 | if (delta + (1 << 25) >= 1 << 26) |
14928 | 0 | { |
14929 | 0 | _bfd_error_handler (_("__tls_get_addr call offset overflow")); |
14930 | 0 | htab->stub_error = true; |
14931 | 0 | return false; |
14932 | 0 | } |
14933 | | |
14934 | 0 | p = stub_sec->contents; |
14935 | 0 | p = tls_get_addr_prologue (htab->elf.dynobj, p, htab); |
14936 | 0 | bfd_put_32 (stub_sec->owner, B_DOT | 1 | (delta & 0x3fffffc), p); |
14937 | 0 | p += 4; |
14938 | 0 | p = tls_get_addr_epilogue (htab->elf.dynobj, p, htab); |
14939 | 0 | return stub_sec->size == (bfd_size_type) (p - stub_sec->contents); |
14940 | 0 | } |
14941 | | |
14942 | | /* Emit eh_frame describing the static wrapper function. */ |
14943 | | |
14944 | | static bfd_byte * |
14945 | | emit_tga_desc_eh_frame (struct ppc_link_hash_table *htab, bfd_byte *p) |
14946 | 0 | { |
14947 | 0 | unsigned int cfa_updt = 11 * 4; |
14948 | 0 | unsigned int i; |
14949 | |
|
14950 | 0 | *p++ = DW_CFA_advance_loc + cfa_updt / 4; |
14951 | 0 | *p++ = DW_CFA_def_cfa_offset; |
14952 | 0 | if (htab->opd_abi) |
14953 | 0 | { |
14954 | 0 | *p++ = 128; |
14955 | 0 | *p++ = 1; |
14956 | 0 | } |
14957 | 0 | else |
14958 | 0 | *p++ = 96; |
14959 | 0 | *p++ = DW_CFA_offset_extended_sf; |
14960 | 0 | *p++ = 65; |
14961 | 0 | *p++ = (-16 / 8) & 0x7f; |
14962 | 0 | for (i = 4; i < 12; i++) |
14963 | 0 | { |
14964 | 0 | *p++ = DW_CFA_offset + i; |
14965 | 0 | *p++ = (htab->opd_abi ? 13 : 12) - i; |
14966 | 0 | } |
14967 | 0 | *p++ = DW_CFA_advance_loc + 10; |
14968 | 0 | *p++ = DW_CFA_def_cfa_offset; |
14969 | 0 | *p++ = 0; |
14970 | 0 | for (i = 4; i < 12; i++) |
14971 | 0 | *p++ = DW_CFA_restore + i; |
14972 | 0 | *p++ = DW_CFA_advance_loc + 2; |
14973 | 0 | *p++ = DW_CFA_restore_extended; |
14974 | 0 | *p++ = 65; |
14975 | 0 | return p; |
14976 | 0 | } |
14977 | | |
14978 | | /* Build all the stubs associated with the current output file. |
14979 | | The stubs are kept in a hash table attached to the main linker |
14980 | | hash table. This function is called via gldelf64ppc_finish. */ |
14981 | | |
14982 | | bool |
14983 | | ppc64_elf_build_stubs (struct bfd_link_info *info, |
14984 | | char **stats) |
14985 | 0 | { |
14986 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
14987 | 0 | struct map_stub *group; |
14988 | 0 | asection *stub_sec; |
14989 | 0 | bfd_byte *p; |
14990 | 0 | int stub_sec_count = 0; |
14991 | |
|
14992 | 0 | if (htab == NULL) |
14993 | 0 | return false; |
14994 | | |
14995 | | /* Allocate memory to hold the linker stubs. */ |
14996 | 0 | for (group = htab->group; group != NULL; group = group->next) |
14997 | 0 | { |
14998 | 0 | group->eh_size = 0; |
14999 | 0 | group->lr_restore = 0; |
15000 | 0 | if ((stub_sec = group->stub_sec) != NULL |
15001 | 0 | && stub_sec->size != 0) |
15002 | 0 | { |
15003 | 0 | stub_sec->contents = bfd_zalloc (htab->params->stub_bfd, |
15004 | 0 | stub_sec->size); |
15005 | 0 | if (stub_sec->contents == NULL) |
15006 | 0 | return false; |
15007 | 0 | stub_sec->alloced = 1; |
15008 | 0 | stub_sec->size = 0; |
15009 | 0 | } |
15010 | 0 | } |
15011 | | |
15012 | 0 | if (htab->glink != NULL && htab->glink->size != 0) |
15013 | 0 | { |
15014 | 0 | unsigned int indx; |
15015 | 0 | bfd_vma plt0; |
15016 | | |
15017 | | /* Build the .glink plt call stub. */ |
15018 | 0 | if (htab->params->emit_stub_syms) |
15019 | 0 | { |
15020 | 0 | struct elf_link_hash_entry *h; |
15021 | 0 | h = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve", |
15022 | 0 | true, false, false); |
15023 | 0 | if (h == NULL) |
15024 | 0 | return false; |
15025 | 0 | if (h->root.type == bfd_link_hash_new) |
15026 | 0 | { |
15027 | 0 | h->root.type = bfd_link_hash_defined; |
15028 | 0 | h->root.u.def.section = htab->glink; |
15029 | 0 | h->root.u.def.value = 8; |
15030 | 0 | h->ref_regular = 1; |
15031 | 0 | h->def_regular = 1; |
15032 | 0 | h->ref_regular_nonweak = 1; |
15033 | 0 | h->forced_local = 1; |
15034 | 0 | h->non_elf = 0; |
15035 | 0 | h->root.linker_def = 1; |
15036 | 0 | } |
15037 | 0 | } |
15038 | 0 | plt0 = (htab->elf.splt->output_section->vma |
15039 | 0 | + htab->elf.splt->output_offset |
15040 | 0 | - 16); |
15041 | 0 | if (info->emitrelocations) |
15042 | 0 | { |
15043 | 0 | Elf_Internal_Rela *r = get_relocs (htab->glink, 1); |
15044 | 0 | if (r == NULL) |
15045 | 0 | return false; |
15046 | 0 | r->r_offset = (htab->glink->output_offset |
15047 | 0 | + htab->glink->output_section->vma); |
15048 | 0 | r->r_info = ELF64_R_INFO (0, R_PPC64_REL64); |
15049 | 0 | r->r_addend = plt0; |
15050 | 0 | } |
15051 | 0 | p = htab->glink->contents; |
15052 | 0 | plt0 -= htab->glink->output_section->vma + htab->glink->output_offset; |
15053 | 0 | bfd_put_64 (htab->glink->owner, plt0, p); |
15054 | 0 | p += 8; |
15055 | 0 | if (htab->opd_abi) |
15056 | 0 | { |
15057 | 0 | bfd_put_32 (htab->glink->owner, MFLR_R12, p); |
15058 | 0 | p += 4; |
15059 | 0 | bfd_put_32 (htab->glink->owner, BCL_20_31, p); |
15060 | 0 | p += 4; |
15061 | 0 | bfd_put_32 (htab->glink->owner, MFLR_R11, p); |
15062 | 0 | p += 4; |
15063 | 0 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | (-16 & 0xfffc), p); |
15064 | 0 | p += 4; |
15065 | 0 | bfd_put_32 (htab->glink->owner, MTLR_R12, p); |
15066 | 0 | p += 4; |
15067 | 0 | bfd_put_32 (htab->glink->owner, ADD_R11_R2_R11, p); |
15068 | 0 | p += 4; |
15069 | 0 | bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); |
15070 | 0 | p += 4; |
15071 | 0 | bfd_put_32 (htab->glink->owner, LD_R2_0R11 | 8, p); |
15072 | 0 | p += 4; |
15073 | 0 | bfd_put_32 (htab->glink->owner, MTCTR_R12, p); |
15074 | 0 | p += 4; |
15075 | 0 | bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 16, p); |
15076 | 0 | p += 4; |
15077 | 0 | } |
15078 | 0 | else |
15079 | 0 | { |
15080 | 0 | unsigned int insn; |
15081 | | |
15082 | | /* 0: |
15083 | | . .quad plt0-1f # plt0 entry relative to 1: |
15084 | | # |
15085 | | # We get here with r12 initially @ a glink branch |
15086 | | # Load the address of _dl_runtime_resolve from plt0 and |
15087 | | # jump to it, with r0 set to the index of the PLT entry |
15088 | | # to be resolved and r11 the link map. |
15089 | | __glink_PLTresolve: |
15090 | | . std %r2,24(%r1) # optional |
15091 | | . mflr %r0 |
15092 | | . bcl 20,31,1f |
15093 | | 1: |
15094 | | . mflr %r11 |
15095 | | . mtlr %r0 |
15096 | | . ld %r0,(0b-1b)(%r11) |
15097 | | . sub %r12,%r12,%r11 |
15098 | | . add %r11,%r0,%r11 |
15099 | | . addi %r0,%r12,1b-2f |
15100 | | . ld %r12,0(%r11) |
15101 | | . srdi %r0,%r0,2 |
15102 | | . mtctr %r12 |
15103 | | . ld %r11,8(%r11) |
15104 | | . bctr |
15105 | | 2: |
15106 | | . b __glink_PLTresolve |
15107 | | . ... |
15108 | | . b __glink_PLTresolve */ |
15109 | |
|
15110 | 0 | if (htab->has_plt_localentry0) |
15111 | 0 | { |
15112 | 0 | bfd_put_32 (htab->glink->owner, STD_R2_0R1 + 24, p); |
15113 | 0 | p += 4; |
15114 | 0 | } |
15115 | 0 | bfd_put_32 (htab->glink->owner, MFLR_R0, p); |
15116 | 0 | p += 4; |
15117 | 0 | bfd_put_32 (htab->glink->owner, BCL_20_31, p); |
15118 | 0 | p += 4; |
15119 | 0 | bfd_put_32 (htab->glink->owner, MFLR_R11, p); |
15120 | 0 | p += 4; |
15121 | 0 | bfd_put_32 (htab->glink->owner, MTLR_R0, p); |
15122 | 0 | p += 4; |
15123 | 0 | if (htab->has_plt_localentry0) |
15124 | 0 | insn = LD_R0_0R11 | (-20 & 0xfffc); |
15125 | 0 | else |
15126 | 0 | insn = LD_R0_0R11 | (-16 & 0xfffc); |
15127 | 0 | bfd_put_32 (htab->glink->owner, insn, p); |
15128 | 0 | p += 4; |
15129 | 0 | bfd_put_32 (htab->glink->owner, SUB_R12_R12_R11, p); |
15130 | 0 | p += 4; |
15131 | 0 | bfd_put_32 (htab->glink->owner, ADD_R11_R0_R11, p); |
15132 | 0 | p += 4; |
15133 | 0 | bfd_put_32 (htab->glink->owner, ADDI_R0_R12 | (-44 & 0xffff), p); |
15134 | 0 | p += 4; |
15135 | 0 | bfd_put_32 (htab->glink->owner, LD_R12_0R11, p); |
15136 | 0 | p += 4; |
15137 | 0 | bfd_put_32 (htab->glink->owner, SRDI_R0_R0_2, p); |
15138 | 0 | p += 4; |
15139 | 0 | bfd_put_32 (htab->glink->owner, MTCTR_R12, p); |
15140 | 0 | p += 4; |
15141 | 0 | bfd_put_32 (htab->glink->owner, LD_R11_0R11 | 8, p); |
15142 | 0 | p += 4; |
15143 | 0 | } |
15144 | 0 | bfd_put_32 (htab->glink->owner, BCTR, p); |
15145 | 0 | p += 4; |
15146 | 0 | BFD_ASSERT (p == htab->glink->contents + GLINK_PLTRESOLVE_SIZE (htab)); |
15147 | | |
15148 | | /* Build the .glink lazy link call stubs. */ |
15149 | 0 | indx = 0; |
15150 | 0 | while (p < htab->glink->contents + htab->glink->size) |
15151 | 0 | { |
15152 | 0 | if (htab->opd_abi) |
15153 | 0 | { |
15154 | 0 | if (indx < 0x8000) |
15155 | 0 | { |
15156 | 0 | bfd_put_32 (htab->glink->owner, LI_R0_0 | indx, p); |
15157 | 0 | p += 4; |
15158 | 0 | } |
15159 | 0 | else |
15160 | 0 | { |
15161 | 0 | bfd_put_32 (htab->glink->owner, LIS_R0_0 | PPC_HI (indx), p); |
15162 | 0 | p += 4; |
15163 | 0 | bfd_put_32 (htab->glink->owner, ORI_R0_R0_0 | PPC_LO (indx), |
15164 | 0 | p); |
15165 | 0 | p += 4; |
15166 | 0 | } |
15167 | 0 | } |
15168 | 0 | bfd_put_32 (htab->glink->owner, |
15169 | 0 | B_DOT | ((htab->glink->contents - p + 8) & 0x3fffffc), p); |
15170 | 0 | indx++; |
15171 | 0 | p += 4; |
15172 | 0 | } |
15173 | 0 | } |
15174 | | |
15175 | 0 | if (htab->tga_group != NULL) |
15176 | 0 | { |
15177 | 0 | htab->tga_group->lr_restore = 23 * 4; |
15178 | 0 | htab->tga_group->stub_sec->size = 24 * 4; |
15179 | 0 | if (!emit_tga_desc (htab)) |
15180 | 0 | return false; |
15181 | 0 | if (htab->glink_eh_frame != NULL |
15182 | 0 | && htab->glink_eh_frame->size != 0) |
15183 | 0 | { |
15184 | 0 | size_t align = 4; |
15185 | |
|
15186 | 0 | p = htab->glink_eh_frame->contents; |
15187 | 0 | p += (sizeof (glink_eh_frame_cie) + align - 1) & -align; |
15188 | 0 | p += 17; |
15189 | 0 | htab->tga_group->eh_size = emit_tga_desc_eh_frame (htab, p) - p; |
15190 | 0 | } |
15191 | 0 | } |
15192 | | |
15193 | | /* Build .glink global entry stubs, and PLT relocs for globals. */ |
15194 | 0 | elf_link_hash_traverse (&htab->elf, build_global_entry_stubs_and_plt, info); |
15195 | |
|
15196 | 0 | if (!write_plt_relocs_for_local_syms (info)) |
15197 | 0 | return false; |
15198 | | |
15199 | 0 | if (htab->brlt != NULL && htab->brlt->size != 0) |
15200 | 0 | { |
15201 | 0 | htab->brlt->contents = bfd_zalloc (htab->brlt->owner, |
15202 | 0 | htab->brlt->size); |
15203 | 0 | if (htab->brlt->contents == NULL) |
15204 | 0 | return false; |
15205 | 0 | htab->brlt->alloced = 1; |
15206 | 0 | } |
15207 | 0 | if (htab->relbrlt != NULL && htab->relbrlt->size != 0) |
15208 | 0 | { |
15209 | 0 | htab->relbrlt->contents = bfd_zalloc (htab->relbrlt->owner, |
15210 | 0 | htab->relbrlt->size); |
15211 | 0 | if (htab->relbrlt->contents == NULL) |
15212 | 0 | return false; |
15213 | 0 | htab->relbrlt->alloced = 1; |
15214 | 0 | } |
15215 | | |
15216 | | /* Build the stubs as directed by the stub hash table. */ |
15217 | 0 | htab->stub_id = 0; |
15218 | 0 | bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); |
15219 | |
|
15220 | 0 | for (group = htab->group; group != NULL; group = group->next) |
15221 | 0 | if (group->needs_save_res) |
15222 | 0 | group->stub_sec->size += htab->sfpr->size; |
15223 | |
|
15224 | 0 | if (htab->relbrlt != NULL) |
15225 | 0 | htab->relbrlt->reloc_count = 0; |
15226 | |
|
15227 | 0 | if (htab->params->plt_stub_align != 0) |
15228 | 0 | for (group = htab->group; group != NULL; group = group->next) |
15229 | 0 | if ((stub_sec = group->stub_sec) != NULL) |
15230 | 0 | { |
15231 | 0 | int align = abs (htab->params->plt_stub_align); |
15232 | 0 | stub_sec->size = (stub_sec->size + (1 << align) - 1) & -(1 << align); |
15233 | 0 | } |
15234 | |
|
15235 | 0 | for (group = htab->group; group != NULL; group = group->next) |
15236 | 0 | if (group->needs_save_res) |
15237 | 0 | { |
15238 | 0 | stub_sec = group->stub_sec; |
15239 | 0 | memcpy (stub_sec->contents + stub_sec->size - htab->sfpr->size, |
15240 | 0 | htab->sfpr->contents, htab->sfpr->size); |
15241 | 0 | if (htab->params->emit_stub_syms) |
15242 | 0 | { |
15243 | 0 | unsigned int i; |
15244 | |
|
15245 | 0 | for (i = 0; i < ARRAY_SIZE (save_res_funcs); i++) |
15246 | 0 | if (!sfpr_define (info, &save_res_funcs[i], stub_sec)) |
15247 | 0 | return false; |
15248 | 0 | } |
15249 | 0 | } |
15250 | | |
15251 | 0 | if (htab->glink_eh_frame != NULL |
15252 | 0 | && htab->glink_eh_frame->size != 0) |
15253 | 0 | { |
15254 | 0 | bfd_vma val; |
15255 | 0 | size_t align = 4; |
15256 | |
|
15257 | 0 | p = htab->glink_eh_frame->contents; |
15258 | 0 | p += (sizeof (glink_eh_frame_cie) + align - 1) & -align; |
15259 | |
|
15260 | 0 | for (group = htab->group; group != NULL; group = group->next) |
15261 | 0 | if (group->eh_size != 0) |
15262 | 0 | { |
15263 | | /* Offset to stub section. */ |
15264 | 0 | val = (group->stub_sec->output_section->vma |
15265 | 0 | + group->stub_sec->output_offset); |
15266 | 0 | val -= (htab->glink_eh_frame->output_section->vma |
15267 | 0 | + htab->glink_eh_frame->output_offset |
15268 | 0 | + (p + 8 - htab->glink_eh_frame->contents)); |
15269 | 0 | if (val + 0x80000000 > 0xffffffff) |
15270 | 0 | { |
15271 | 0 | _bfd_error_handler |
15272 | 0 | (_("%s offset too large for .eh_frame sdata4 encoding"), |
15273 | 0 | group->stub_sec->name); |
15274 | 0 | return false; |
15275 | 0 | } |
15276 | 0 | bfd_put_32 (htab->elf.dynobj, val, p + 8); |
15277 | 0 | p += (group->eh_size + 17 + 3) & -4; |
15278 | 0 | } |
15279 | 0 | if (htab->glink != NULL && htab->glink->size != 0) |
15280 | 0 | { |
15281 | | /* Offset to .glink. */ |
15282 | 0 | val = (htab->glink->output_section->vma |
15283 | 0 | + htab->glink->output_offset |
15284 | 0 | + 8); |
15285 | 0 | val -= (htab->glink_eh_frame->output_section->vma |
15286 | 0 | + htab->glink_eh_frame->output_offset |
15287 | 0 | + (p + 8 - htab->glink_eh_frame->contents)); |
15288 | 0 | if (val + 0x80000000 > 0xffffffff) |
15289 | 0 | { |
15290 | 0 | _bfd_error_handler |
15291 | 0 | (_("%s offset too large for .eh_frame sdata4 encoding"), |
15292 | 0 | htab->glink->name); |
15293 | 0 | return false; |
15294 | 0 | } |
15295 | 0 | bfd_put_32 (htab->elf.dynobj, val, p + 8); |
15296 | 0 | p += (24 + align - 1) & -align; |
15297 | 0 | } |
15298 | 0 | } |
15299 | | |
15300 | 0 | if (htab->elf.srelrdyn != NULL && htab->elf.srelrdyn->size != 0) |
15301 | 0 | { |
15302 | 0 | htab->elf.srelrdyn->contents |
15303 | 0 | = bfd_alloc (htab->elf.dynobj, htab->elf.srelrdyn->size); |
15304 | 0 | if (htab->elf.srelrdyn->contents == NULL) |
15305 | 0 | return false; |
15306 | 0 | htab->elf.srelrdyn->alloced = 1; |
15307 | |
|
15308 | 0 | bfd_vma *relr_addr = sort_relr (htab); |
15309 | 0 | if (htab->relr_count != 0 && relr_addr == NULL) |
15310 | 0 | return false; |
15311 | | |
15312 | 0 | size_t i = 0; |
15313 | 0 | bfd_byte *loc = htab->elf.srelrdyn->contents; |
15314 | 0 | while (i < htab->relr_count) |
15315 | 0 | { |
15316 | 0 | bfd_vma base = relr_addr[i]; |
15317 | 0 | BFD_ASSERT ((base & ((1 << RELR_ALIGN) - 1)) == 0); |
15318 | 0 | bfd_put_64 (htab->elf.dynobj, base, loc); |
15319 | 0 | loc += 8; |
15320 | 0 | i++; |
15321 | 0 | while (i < htab->relr_count |
15322 | 0 | && relr_addr[i] == base) |
15323 | 0 | { |
15324 | 0 | htab->stub_error = true; |
15325 | 0 | i++; |
15326 | 0 | } |
15327 | 0 | base += 8; |
15328 | 0 | while (1) |
15329 | 0 | { |
15330 | 0 | bfd_vma bits = 0; |
15331 | 0 | while (i < htab->relr_count |
15332 | 0 | && relr_addr[i] - base < 63 * 8 |
15333 | 0 | && (relr_addr[i] - base) % 8 == 0) |
15334 | 0 | { |
15335 | 0 | bits |= (bfd_vma) 1 << ((relr_addr[i] - base) / 8); |
15336 | 0 | i++; |
15337 | 0 | } |
15338 | 0 | if (bits == 0) |
15339 | 0 | break; |
15340 | 0 | bfd_put_64 (htab->elf.dynobj, (bits << 1) | 1, loc); |
15341 | 0 | loc += 8; |
15342 | 0 | base += 63 * 8; |
15343 | 0 | } |
15344 | 0 | } |
15345 | 0 | free (relr_addr); |
15346 | | /* Pad any excess with 1's, a do-nothing encoding. */ |
15347 | 0 | while ((size_t) (loc - htab->elf.srelrdyn->contents) |
15348 | 0 | < htab->elf.srelrdyn->size) |
15349 | 0 | { |
15350 | 0 | bfd_put_64 (htab->elf.dynobj, 1, loc); |
15351 | 0 | loc += 8; |
15352 | 0 | } |
15353 | 0 | } |
15354 | 0 | free (htab->relr); |
15355 | 0 | htab->relr = NULL; |
15356 | |
|
15357 | 0 | for (group = htab->group; group != NULL; group = group->next) |
15358 | 0 | if ((stub_sec = group->stub_sec) != NULL) |
15359 | 0 | { |
15360 | 0 | stub_sec_count += 1; |
15361 | 0 | if (stub_sec->rawsize != stub_sec->size |
15362 | 0 | && (htab->stub_iteration <= STUB_SHRINK_ITER |
15363 | 0 | || stub_sec->rawsize < stub_sec->size)) |
15364 | 0 | break; |
15365 | 0 | } |
15366 | |
|
15367 | 0 | if (group != NULL) |
15368 | 0 | htab->stub_error = true; |
15369 | |
|
15370 | 0 | if (htab->stub_error) |
15371 | 0 | { |
15372 | 0 | _bfd_error_handler (_("stubs don't match calculated size")); |
15373 | 0 | return false; |
15374 | 0 | } |
15375 | | |
15376 | 0 | if (stats != NULL) |
15377 | 0 | { |
15378 | 0 | char *groupmsg; |
15379 | 0 | if (asprintf (&groupmsg, |
15380 | 0 | ngettext ("linker stubs in %u group", |
15381 | 0 | "linker stubs in %u groups", |
15382 | 0 | stub_sec_count), |
15383 | 0 | stub_sec_count) < 0) |
15384 | 0 | *stats = NULL; |
15385 | 0 | else |
15386 | 0 | { |
15387 | 0 | if (asprintf (stats, _("%s, iter %u\n" |
15388 | 0 | " branch %lu\n" |
15389 | 0 | " long branch %lu\n" |
15390 | 0 | " plt call %lu\n" |
15391 | 0 | " global entry %lu"), |
15392 | 0 | groupmsg, htab->stub_iteration, |
15393 | 0 | htab->stub_count[ppc_stub_long_branch - 1], |
15394 | 0 | htab->stub_count[ppc_stub_plt_branch - 1], |
15395 | 0 | htab->stub_count[ppc_stub_plt_call - 1], |
15396 | 0 | htab->stub_count[ppc_stub_global_entry - 1]) < 0) |
15397 | 0 | *stats = NULL; |
15398 | 0 | free (groupmsg); |
15399 | 0 | } |
15400 | 0 | } |
15401 | 0 | return true; |
15402 | 0 | } |
15403 | | |
15404 | | /* What to do when ld finds relocations against symbols defined in |
15405 | | discarded sections. */ |
15406 | | |
15407 | | static unsigned int |
15408 | | ppc64_elf_action_discarded (asection *sec) |
15409 | 0 | { |
15410 | 0 | if (strcmp (".opd", sec->name) == 0) |
15411 | 0 | return 0; |
15412 | | |
15413 | 0 | if (strcmp (".toc", sec->name) == 0) |
15414 | 0 | return 0; |
15415 | | |
15416 | 0 | if (strcmp (".toc1", sec->name) == 0) |
15417 | 0 | return 0; |
15418 | | |
15419 | 0 | return _bfd_elf_default_action_discarded (sec); |
15420 | 0 | } |
15421 | | |
15422 | | /* These are the dynamic relocations supported by glibc. */ |
15423 | | |
15424 | | static bool |
15425 | | ppc64_glibc_dynamic_reloc (enum elf_ppc64_reloc_type r_type) |
15426 | 0 | { |
15427 | 0 | switch (r_type) |
15428 | 0 | { |
15429 | 0 | case R_PPC64_RELATIVE: |
15430 | 0 | case R_PPC64_NONE: |
15431 | 0 | case R_PPC64_ADDR64: |
15432 | 0 | case R_PPC64_GLOB_DAT: |
15433 | 0 | case R_PPC64_IRELATIVE: |
15434 | 0 | case R_PPC64_JMP_IREL: |
15435 | 0 | case R_PPC64_JMP_SLOT: |
15436 | 0 | case R_PPC64_DTPMOD64: |
15437 | 0 | case R_PPC64_DTPREL64: |
15438 | 0 | case R_PPC64_TPREL64: |
15439 | 0 | case R_PPC64_TPREL16_LO_DS: |
15440 | 0 | case R_PPC64_TPREL16_DS: |
15441 | 0 | case R_PPC64_TPREL16: |
15442 | 0 | case R_PPC64_TPREL16_LO: |
15443 | 0 | case R_PPC64_TPREL16_HI: |
15444 | 0 | case R_PPC64_TPREL16_HIGH: |
15445 | 0 | case R_PPC64_TPREL16_HA: |
15446 | 0 | case R_PPC64_TPREL16_HIGHA: |
15447 | 0 | case R_PPC64_TPREL16_HIGHER: |
15448 | 0 | case R_PPC64_TPREL16_HIGHEST: |
15449 | 0 | case R_PPC64_TPREL16_HIGHERA: |
15450 | 0 | case R_PPC64_TPREL16_HIGHESTA: |
15451 | 0 | case R_PPC64_ADDR16_LO_DS: |
15452 | 0 | case R_PPC64_ADDR16_LO: |
15453 | 0 | case R_PPC64_ADDR16_HI: |
15454 | 0 | case R_PPC64_ADDR16_HIGH: |
15455 | 0 | case R_PPC64_ADDR16_HA: |
15456 | 0 | case R_PPC64_ADDR16_HIGHA: |
15457 | 0 | case R_PPC64_REL30: |
15458 | 0 | case R_PPC64_COPY: |
15459 | 0 | case R_PPC64_UADDR64: |
15460 | 0 | case R_PPC64_UADDR32: |
15461 | 0 | case R_PPC64_ADDR32: |
15462 | 0 | case R_PPC64_ADDR24: |
15463 | 0 | case R_PPC64_ADDR16: |
15464 | 0 | case R_PPC64_UADDR16: |
15465 | 0 | case R_PPC64_ADDR16_DS: |
15466 | 0 | case R_PPC64_ADDR16_HIGHER: |
15467 | 0 | case R_PPC64_ADDR16_HIGHEST: |
15468 | 0 | case R_PPC64_ADDR16_HIGHERA: |
15469 | 0 | case R_PPC64_ADDR16_HIGHESTA: |
15470 | 0 | case R_PPC64_ADDR14: |
15471 | 0 | case R_PPC64_ADDR14_BRTAKEN: |
15472 | 0 | case R_PPC64_ADDR14_BRNTAKEN: |
15473 | 0 | case R_PPC64_REL32: |
15474 | 0 | case R_PPC64_REL64: |
15475 | 0 | return true; |
15476 | | |
15477 | 0 | default: |
15478 | 0 | return false; |
15479 | 0 | } |
15480 | 0 | } |
15481 | | |
15482 | | /* The RELOCATE_SECTION function is called by the ELF backend linker |
15483 | | to handle the relocations for a section. |
15484 | | |
15485 | | The relocs are always passed as Rela structures; if the section |
15486 | | actually uses Rel structures, the r_addend field will always be |
15487 | | zero. |
15488 | | |
15489 | | This function is responsible for adjust the section contents as |
15490 | | necessary, and (if using Rela relocs and generating a |
15491 | | relocatable output file) adjusting the reloc addend as |
15492 | | necessary. |
15493 | | |
15494 | | This function does not have to worry about setting the reloc |
15495 | | address or the reloc symbol index. |
15496 | | |
15497 | | LOCAL_SYMS is a pointer to the swapped in local symbols. |
15498 | | |
15499 | | LOCAL_SECTIONS is an array giving the section in the input file |
15500 | | corresponding to the st_shndx field of each local symbol. |
15501 | | |
15502 | | The global hash table entry for the global symbols can be found |
15503 | | via elf_sym_hashes (input_bfd). |
15504 | | |
15505 | | When generating relocatable output, this function must handle |
15506 | | STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
15507 | | going to be the section symbol corresponding to the output |
15508 | | section, which means that the addend must be adjusted |
15509 | | accordingly. */ |
15510 | | |
15511 | | static int |
15512 | | ppc64_elf_relocate_section (bfd *output_bfd, |
15513 | | struct bfd_link_info *info, |
15514 | | bfd *input_bfd, |
15515 | | asection *input_section, |
15516 | | bfd_byte *contents, |
15517 | | Elf_Internal_Rela *relocs, |
15518 | | Elf_Internal_Sym *local_syms, |
15519 | | asection **local_sections) |
15520 | 0 | { |
15521 | 0 | struct ppc_link_hash_table *htab; |
15522 | 0 | Elf_Internal_Shdr *symtab_hdr; |
15523 | 0 | struct elf_link_hash_entry **sym_hashes; |
15524 | 0 | Elf_Internal_Rela *rel; |
15525 | 0 | Elf_Internal_Rela *wrel; |
15526 | 0 | Elf_Internal_Rela *relend; |
15527 | 0 | Elf_Internal_Rela outrel; |
15528 | 0 | bfd_byte *loc; |
15529 | 0 | struct got_entry **local_got_ents; |
15530 | 0 | bfd_vma TOCstart; |
15531 | 0 | bool ret = true; |
15532 | 0 | bool is_opd; |
15533 | | /* Assume 'at' branch hints. */ |
15534 | 0 | bool is_isa_v2 = true; |
15535 | 0 | bool warned_dynamic = false; |
15536 | 0 | bfd_vma d_offset = (bfd_big_endian (input_bfd) ? 2 : 0); |
15537 | | |
15538 | | /* Initialize howto table if needed. */ |
15539 | 0 | if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
15540 | 0 | ppc_howto_init (); |
15541 | |
|
15542 | 0 | htab = ppc_hash_table (info); |
15543 | 0 | if (htab == NULL) |
15544 | 0 | return false; |
15545 | | |
15546 | | /* Don't relocate stub sections. */ |
15547 | 0 | if (input_section->owner == htab->params->stub_bfd) |
15548 | 0 | return true; |
15549 | | |
15550 | 0 | if (!is_ppc64_elf (input_bfd)) |
15551 | 0 | { |
15552 | 0 | bfd_set_error (bfd_error_wrong_format); |
15553 | 0 | return false; |
15554 | 0 | } |
15555 | | |
15556 | 0 | local_got_ents = elf_local_got_ents (input_bfd); |
15557 | 0 | TOCstart = elf_gp (output_bfd); |
15558 | 0 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
15559 | 0 | sym_hashes = elf_sym_hashes (input_bfd); |
15560 | 0 | is_opd = ppc64_elf_section_data (input_section)->sec_type == sec_opd; |
15561 | |
|
15562 | 0 | rel = wrel = relocs; |
15563 | 0 | relend = relocs + input_section->reloc_count; |
15564 | 0 | for (; rel < relend; wrel++, rel++) |
15565 | 0 | { |
15566 | 0 | enum elf_ppc64_reloc_type r_type; |
15567 | 0 | bfd_vma addend; |
15568 | 0 | bfd_reloc_status_type r; |
15569 | 0 | Elf_Internal_Sym *sym; |
15570 | 0 | asection *sec; |
15571 | 0 | struct elf_link_hash_entry *h_elf; |
15572 | 0 | struct ppc_link_hash_entry *h; |
15573 | 0 | struct ppc_link_hash_entry *fdh; |
15574 | 0 | const char *sym_name; |
15575 | 0 | unsigned long r_symndx, toc_symndx; |
15576 | 0 | bfd_vma toc_addend; |
15577 | 0 | unsigned char tls_mask, tls_gd, tls_type; |
15578 | 0 | unsigned char sym_type; |
15579 | 0 | bfd_vma relocation; |
15580 | 0 | bool unresolved_reloc, save_unresolved_reloc; |
15581 | 0 | bool warned; |
15582 | 0 | enum { DEST_NORMAL, DEST_OPD, DEST_STUB } reloc_dest; |
15583 | 0 | unsigned int insn; |
15584 | 0 | unsigned int mask; |
15585 | 0 | struct ppc_stub_hash_entry *stub_entry; |
15586 | 0 | bfd_vma max_br_offset; |
15587 | 0 | bfd_vma from; |
15588 | 0 | Elf_Internal_Rela orig_rel; |
15589 | 0 | reloc_howto_type *howto; |
15590 | 0 | struct reloc_howto_struct alt_howto; |
15591 | 0 | uint64_t pinsn; |
15592 | 0 | bfd_vma offset; |
15593 | |
|
15594 | 0 | again: |
15595 | 0 | orig_rel = *rel; |
15596 | |
|
15597 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
15598 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
15599 | | |
15600 | | /* For old style R_PPC64_TOC relocs with a zero symbol, use the |
15601 | | symbol of the previous ADDR64 reloc. The symbol gives us the |
15602 | | proper TOC base to use. */ |
15603 | 0 | if (rel->r_info == ELF64_R_INFO (0, R_PPC64_TOC) |
15604 | 0 | && wrel != relocs |
15605 | 0 | && ELF64_R_TYPE (wrel[-1].r_info) == R_PPC64_ADDR64 |
15606 | 0 | && is_opd) |
15607 | 0 | r_symndx = ELF64_R_SYM (wrel[-1].r_info); |
15608 | |
|
15609 | 0 | sym = NULL; |
15610 | 0 | sec = NULL; |
15611 | 0 | h_elf = NULL; |
15612 | 0 | sym_name = NULL; |
15613 | 0 | unresolved_reloc = false; |
15614 | 0 | warned = false; |
15615 | |
|
15616 | 0 | if (r_symndx < symtab_hdr->sh_info) |
15617 | 0 | { |
15618 | | /* It's a local symbol. */ |
15619 | 0 | struct _opd_sec_data *opd; |
15620 | |
|
15621 | 0 | sym = local_syms + r_symndx; |
15622 | 0 | sec = local_sections[r_symndx]; |
15623 | 0 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec); |
15624 | 0 | sym_type = ELF64_ST_TYPE (sym->st_info); |
15625 | 0 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
15626 | 0 | opd = get_opd_info (sec); |
15627 | 0 | if (opd != NULL && opd->adjust != NULL) |
15628 | 0 | { |
15629 | 0 | long adjust = opd->adjust[OPD_NDX (sym->st_value |
15630 | 0 | + rel->r_addend)]; |
15631 | 0 | if (adjust == -1) |
15632 | 0 | relocation = 0; |
15633 | 0 | else |
15634 | 0 | { |
15635 | | /* If this is a relocation against the opd section sym |
15636 | | and we have edited .opd, adjust the reloc addend so |
15637 | | that ld -r and ld --emit-relocs output is correct. |
15638 | | If it is a reloc against some other .opd symbol, |
15639 | | then the symbol value will be adjusted later. */ |
15640 | 0 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
15641 | 0 | rel->r_addend += adjust; |
15642 | 0 | else |
15643 | 0 | relocation += adjust; |
15644 | 0 | } |
15645 | 0 | } |
15646 | 0 | } |
15647 | 0 | else |
15648 | 0 | { |
15649 | 0 | bool ignored; |
15650 | |
|
15651 | 0 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
15652 | 0 | r_symndx, symtab_hdr, sym_hashes, |
15653 | 0 | h_elf, sec, relocation, |
15654 | 0 | unresolved_reloc, warned, ignored); |
15655 | 0 | sym_name = h_elf->root.root.string; |
15656 | 0 | sym_type = h_elf->type; |
15657 | 0 | if (sec != NULL |
15658 | 0 | && sec->owner == output_bfd |
15659 | 0 | && strcmp (sec->name, ".opd") == 0) |
15660 | 0 | { |
15661 | | /* This is a symbol defined in a linker script. All |
15662 | | such are defined in output sections, even those |
15663 | | defined by simple assignment from a symbol defined in |
15664 | | an input section. Transfer the symbol to an |
15665 | | appropriate input .opd section, so that a branch to |
15666 | | this symbol will be mapped to the location specified |
15667 | | by the opd entry. */ |
15668 | 0 | struct bfd_link_order *lo; |
15669 | 0 | for (lo = sec->map_head.link_order; lo != NULL; lo = lo->next) |
15670 | 0 | if (lo->type == bfd_indirect_link_order) |
15671 | 0 | { |
15672 | 0 | asection *isec = lo->u.indirect.section; |
15673 | 0 | if (h_elf->root.u.def.value >= isec->output_offset |
15674 | 0 | && h_elf->root.u.def.value < (isec->output_offset |
15675 | 0 | + isec->size)) |
15676 | 0 | { |
15677 | 0 | h_elf->root.u.def.value -= isec->output_offset; |
15678 | 0 | h_elf->root.u.def.section = isec; |
15679 | 0 | sec = isec; |
15680 | 0 | break; |
15681 | 0 | } |
15682 | 0 | } |
15683 | 0 | } |
15684 | 0 | } |
15685 | 0 | h = ppc_elf_hash_entry (h_elf); |
15686 | |
|
15687 | 0 | if (sec != NULL && discarded_section (sec)) |
15688 | 0 | { |
15689 | 0 | _bfd_clear_contents (ppc64_elf_howto_table[r_type], |
15690 | 0 | input_bfd, input_section, |
15691 | 0 | contents, rel->r_offset); |
15692 | 0 | wrel->r_offset = rel->r_offset; |
15693 | 0 | wrel->r_info = 0; |
15694 | 0 | wrel->r_addend = 0; |
15695 | | |
15696 | | /* For ld -r, remove relocations in debug sections against |
15697 | | symbols defined in discarded sections. Not done for |
15698 | | non-debug to preserve relocs in .eh_frame which the |
15699 | | eh_frame editing code expects to be present. */ |
15700 | 0 | if (bfd_link_relocatable (info) |
15701 | 0 | && (input_section->flags & SEC_DEBUGGING)) |
15702 | 0 | wrel--; |
15703 | |
|
15704 | 0 | continue; |
15705 | 0 | } |
15706 | | |
15707 | 0 | if (bfd_link_relocatable (info)) |
15708 | 0 | goto copy_reloc; |
15709 | | |
15710 | 0 | if (h != NULL && &h->elf == htab->elf.hgot) |
15711 | 0 | { |
15712 | 0 | relocation = TOCstart + htab->sec_info[input_section->id].toc_off; |
15713 | 0 | sec = bfd_abs_section_ptr; |
15714 | 0 | unresolved_reloc = false; |
15715 | 0 | } |
15716 | | |
15717 | | /* TLS optimizations. Replace instruction sequences and relocs |
15718 | | based on information we collected in tls_optimize. We edit |
15719 | | RELOCS so that --emit-relocs will output something sensible |
15720 | | for the final instruction stream. */ |
15721 | 0 | tls_mask = 0; |
15722 | 0 | tls_gd = 0; |
15723 | 0 | toc_symndx = 0; |
15724 | 0 | if (h != NULL) |
15725 | 0 | tls_mask = h->tls_mask; |
15726 | 0 | else if (local_got_ents != NULL) |
15727 | 0 | { |
15728 | 0 | struct plt_entry **local_plt = (struct plt_entry **) |
15729 | 0 | (local_got_ents + symtab_hdr->sh_info); |
15730 | 0 | unsigned char *lgot_masks = (unsigned char *) |
15731 | 0 | (local_plt + symtab_hdr->sh_info); |
15732 | 0 | tls_mask = lgot_masks[r_symndx]; |
15733 | 0 | } |
15734 | 0 | if (((tls_mask & TLS_TLS) == 0 || tls_mask == (TLS_TLS | TLS_MARK)) |
15735 | 0 | && (r_type == R_PPC64_TLS |
15736 | 0 | || r_type == R_PPC64_TLSGD |
15737 | 0 | || r_type == R_PPC64_TLSLD)) |
15738 | 0 | { |
15739 | | /* Check for toc tls entries. */ |
15740 | 0 | unsigned char *toc_tls; |
15741 | |
|
15742 | 0 | if (!get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, |
15743 | 0 | &local_syms, rel, input_bfd)) |
15744 | 0 | return false; |
15745 | | |
15746 | 0 | if (toc_tls) |
15747 | 0 | tls_mask = *toc_tls; |
15748 | 0 | } |
15749 | | |
15750 | | /* Check that tls relocs are used with tls syms, and non-tls |
15751 | | relocs are used with non-tls syms. */ |
15752 | 0 | if (r_symndx != STN_UNDEF |
15753 | 0 | && r_type != R_PPC64_NONE |
15754 | 0 | && (h == NULL |
15755 | 0 | || h->elf.root.type == bfd_link_hash_defined |
15756 | 0 | || h->elf.root.type == bfd_link_hash_defweak) |
15757 | 0 | && IS_PPC64_TLS_RELOC (r_type) != (sym_type == STT_TLS)) |
15758 | 0 | { |
15759 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15760 | 0 | && (r_type == R_PPC64_TLS |
15761 | 0 | || r_type == R_PPC64_TLSGD |
15762 | 0 | || r_type == R_PPC64_TLSLD)) |
15763 | | /* R_PPC64_TLS is OK against a symbol in the TOC. */ |
15764 | 0 | ; |
15765 | 0 | else |
15766 | 0 | info->callbacks->einfo |
15767 | 0 | (!IS_PPC64_TLS_RELOC (r_type) |
15768 | | /* xgettext:c-format */ |
15769 | 0 | ? _("%H: %s used with TLS symbol `%pT'\n") |
15770 | | /* xgettext:c-format */ |
15771 | 0 | : _("%H: %s used with non-TLS symbol `%pT'\n"), |
15772 | 0 | input_bfd, input_section, rel->r_offset, |
15773 | 0 | ppc64_elf_howto_table[r_type]->name, |
15774 | 0 | sym_name); |
15775 | 0 | } |
15776 | | |
15777 | | /* Ensure reloc mapping code below stays sane. */ |
15778 | 0 | if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 |
15779 | 0 | || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 |
15780 | 0 | || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) |
15781 | 0 | || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) |
15782 | 0 | || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) |
15783 | 0 | || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) |
15784 | 0 | || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) |
15785 | 0 | || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) |
15786 | 0 | || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) |
15787 | 0 | || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) |
15788 | 0 | abort (); |
15789 | | |
15790 | 0 | switch (r_type) |
15791 | 0 | { |
15792 | 0 | default: |
15793 | 0 | break; |
15794 | | |
15795 | 0 | case R_PPC64_LO_DS_OPT: |
15796 | 0 | if (offset_in_range (input_section, rel->r_offset - d_offset, 4)) |
15797 | 0 | { |
15798 | 0 | insn = bfd_get_32 (input_bfd, |
15799 | 0 | contents + rel->r_offset - d_offset); |
15800 | 0 | if ((insn & (0x3fu << 26)) != 58u << 26) |
15801 | 0 | abort (); |
15802 | 0 | insn += (14u << 26) - (58u << 26); |
15803 | 0 | bfd_put_32 (input_bfd, insn, |
15804 | 0 | contents + rel->r_offset - d_offset); |
15805 | 0 | r_type = R_PPC64_TOC16_LO; |
15806 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
15807 | 0 | } |
15808 | 0 | break; |
15809 | | |
15810 | 0 | case R_PPC64_TOC16: |
15811 | 0 | case R_PPC64_TOC16_LO: |
15812 | 0 | case R_PPC64_TOC16_DS: |
15813 | 0 | case R_PPC64_TOC16_LO_DS: |
15814 | 0 | { |
15815 | | /* Check for toc tls entries. */ |
15816 | 0 | unsigned char *toc_tls; |
15817 | 0 | int retval; |
15818 | |
|
15819 | 0 | retval = get_tls_mask (&toc_tls, &toc_symndx, &toc_addend, |
15820 | 0 | &local_syms, rel, input_bfd); |
15821 | 0 | if (retval == 0) |
15822 | 0 | return false; |
15823 | | |
15824 | 0 | if (toc_tls) |
15825 | 0 | { |
15826 | 0 | tls_mask = *toc_tls; |
15827 | 0 | if (r_type == R_PPC64_TOC16_DS |
15828 | 0 | || r_type == R_PPC64_TOC16_LO_DS) |
15829 | 0 | { |
15830 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15831 | 0 | && (tls_mask & (TLS_DTPREL | TLS_TPREL)) == 0) |
15832 | 0 | goto toctprel; |
15833 | 0 | } |
15834 | 0 | else |
15835 | 0 | { |
15836 | | /* If we found a GD reloc pair, then we might be |
15837 | | doing a GD->IE transition. */ |
15838 | 0 | if (retval == 2) |
15839 | 0 | { |
15840 | 0 | tls_gd = TLS_GDIE; |
15841 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15842 | 0 | && (tls_mask & TLS_GD) == 0) |
15843 | 0 | goto tls_ldgd_opt; |
15844 | 0 | } |
15845 | 0 | else if (retval == 3) |
15846 | 0 | { |
15847 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15848 | 0 | && (tls_mask & TLS_LD) == 0) |
15849 | 0 | goto tls_ldgd_opt; |
15850 | 0 | } |
15851 | 0 | } |
15852 | 0 | } |
15853 | 0 | } |
15854 | 0 | break; |
15855 | | |
15856 | 0 | case R_PPC64_GOT_TPREL16_HI: |
15857 | 0 | case R_PPC64_GOT_TPREL16_HA: |
15858 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15859 | 0 | && (tls_mask & TLS_TPREL) == 0 |
15860 | 0 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) |
15861 | 0 | { |
15862 | 0 | rel->r_offset -= d_offset; |
15863 | 0 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
15864 | 0 | r_type = R_PPC64_NONE; |
15865 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
15866 | 0 | } |
15867 | 0 | break; |
15868 | | |
15869 | 0 | case R_PPC64_GOT_TPREL16_DS: |
15870 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
15871 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15872 | 0 | && (tls_mask & TLS_TPREL) == 0 |
15873 | 0 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) |
15874 | 0 | { |
15875 | 0 | toctprel: |
15876 | 0 | insn = bfd_get_32 (input_bfd, |
15877 | 0 | contents + rel->r_offset - d_offset); |
15878 | 0 | insn &= 31 << 21; |
15879 | 0 | insn |= 0x3c0d0000; /* addis 0,13,0 */ |
15880 | 0 | bfd_put_32 (input_bfd, insn, |
15881 | 0 | contents + rel->r_offset - d_offset); |
15882 | 0 | r_type = R_PPC64_TPREL16_HA; |
15883 | 0 | if (toc_symndx != 0) |
15884 | 0 | { |
15885 | 0 | rel->r_info = ELF64_R_INFO (toc_symndx, r_type); |
15886 | 0 | rel->r_addend = toc_addend; |
15887 | | /* We changed the symbol. Start over in order to |
15888 | | get h, sym, sec etc. right. */ |
15889 | 0 | goto again; |
15890 | 0 | } |
15891 | 0 | else |
15892 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
15893 | 0 | } |
15894 | 0 | break; |
15895 | | |
15896 | 0 | case R_PPC64_GOT_TPREL_PCREL34: |
15897 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15898 | 0 | && (tls_mask & TLS_TPREL) == 0 |
15899 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
15900 | 0 | { |
15901 | | /* pld ra,sym@got@tprel@pcrel -> paddi ra,r13,sym@tprel */ |
15902 | 0 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
15903 | 0 | pinsn <<= 32; |
15904 | 0 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
15905 | 0 | pinsn += ((2ULL << 56) + (-1ULL << 52) |
15906 | 0 | + (14ULL << 26) - (57ULL << 26) + (13ULL << 16)); |
15907 | 0 | bfd_put_32 (input_bfd, pinsn >> 32, |
15908 | 0 | contents + rel->r_offset); |
15909 | 0 | bfd_put_32 (input_bfd, pinsn & 0xffffffff, |
15910 | 0 | contents + rel->r_offset + 4); |
15911 | 0 | r_type = R_PPC64_TPREL34; |
15912 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
15913 | 0 | } |
15914 | 0 | break; |
15915 | | |
15916 | 0 | case R_PPC64_TLS: |
15917 | 0 | if ((tls_mask & TLS_TLS) != 0 |
15918 | 0 | && (tls_mask & TLS_TPREL) == 0 |
15919 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
15920 | 0 | { |
15921 | 0 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
15922 | 0 | insn = _bfd_elf_ppc_at_tls_transform (insn, 13); |
15923 | 0 | if (insn == 0) |
15924 | 0 | break; |
15925 | 0 | if ((rel->r_offset & 3) == 0) |
15926 | 0 | { |
15927 | 0 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
15928 | | /* Was PPC64_TLS which sits on insn boundary, now |
15929 | | PPC64_TPREL16_LO which is at low-order half-word. */ |
15930 | 0 | rel->r_offset += d_offset; |
15931 | 0 | r_type = R_PPC64_TPREL16_LO; |
15932 | 0 | if (toc_symndx != 0) |
15933 | 0 | { |
15934 | 0 | rel->r_info = ELF64_R_INFO (toc_symndx, r_type); |
15935 | 0 | rel->r_addend = toc_addend; |
15936 | | /* We changed the symbol. Start over in order to |
15937 | | get h, sym, sec etc. right. */ |
15938 | 0 | goto again; |
15939 | 0 | } |
15940 | 0 | else |
15941 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
15942 | 0 | } |
15943 | 0 | else if ((rel->r_offset & 3) == 1) |
15944 | 0 | { |
15945 | | /* For pcrel IE to LE we already have the full |
15946 | | offset and thus don't need an addi here. A nop |
15947 | | or mr will do. */ |
15948 | 0 | if ((insn & (0x3fu << 26)) == 14 << 26) |
15949 | 0 | { |
15950 | | /* Extract regs from addi rt,ra,si. */ |
15951 | 0 | unsigned int rt = (insn >> 21) & 0x1f; |
15952 | 0 | unsigned int ra = (insn >> 16) & 0x1f; |
15953 | 0 | if (rt == ra) |
15954 | 0 | insn = NOP; |
15955 | 0 | else |
15956 | 0 | { |
15957 | | /* Build or ra,rs,rb with rb==rs, ie. mr ra,rs. */ |
15958 | 0 | insn = (rt << 16) | (ra << 21) | (ra << 11); |
15959 | 0 | insn |= (31u << 26) | (444u << 1); |
15960 | 0 | } |
15961 | 0 | } |
15962 | 0 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset - 1); |
15963 | 0 | } |
15964 | 0 | } |
15965 | 0 | break; |
15966 | | |
15967 | 0 | case R_PPC64_GOT_TLSGD16_HI: |
15968 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
15969 | 0 | tls_gd = TLS_GDIE; |
15970 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
15971 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
15972 | 0 | goto tls_gdld_hi; |
15973 | 0 | break; |
15974 | | |
15975 | 0 | case R_PPC64_GOT_TLSLD16_HI: |
15976 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
15977 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
15978 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
15979 | 0 | { |
15980 | 0 | tls_gdld_hi: |
15981 | 0 | if ((tls_mask & tls_gd) != 0) |
15982 | 0 | r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) |
15983 | 0 | + R_PPC64_GOT_TPREL16_DS); |
15984 | 0 | else |
15985 | 0 | { |
15986 | 0 | rel->r_offset -= d_offset; |
15987 | 0 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
15988 | 0 | r_type = R_PPC64_NONE; |
15989 | 0 | } |
15990 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
15991 | 0 | } |
15992 | 0 | break; |
15993 | | |
15994 | 0 | case R_PPC64_GOT_TLSGD16: |
15995 | 0 | case R_PPC64_GOT_TLSGD16_LO: |
15996 | 0 | tls_gd = TLS_GDIE; |
15997 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
15998 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
15999 | 0 | goto tls_ldgd_opt; |
16000 | 0 | break; |
16001 | | |
16002 | 0 | case R_PPC64_GOT_TLSLD16: |
16003 | 0 | case R_PPC64_GOT_TLSLD16_LO: |
16004 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
16005 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
16006 | 0 | { |
16007 | 0 | unsigned int insn1, insn2; |
16008 | |
|
16009 | 0 | tls_ldgd_opt: |
16010 | 0 | offset = (bfd_vma) -1; |
16011 | | /* If not using the newer R_PPC64_TLSGD/LD to mark |
16012 | | __tls_get_addr calls, we must trust that the call |
16013 | | stays with its arg setup insns, ie. that the next |
16014 | | reloc is the __tls_get_addr call associated with |
16015 | | the current reloc. Edit both insns. */ |
16016 | 0 | if (input_section->nomark_tls_get_addr |
16017 | 0 | && rel + 1 < relend |
16018 | 0 | && branch_reloc_hash_match (input_bfd, rel + 1, |
16019 | 0 | htab->tls_get_addr_fd, |
16020 | 0 | htab->tga_desc_fd, |
16021 | 0 | htab->tls_get_addr, |
16022 | 0 | htab->tga_desc)) |
16023 | 0 | offset = rel[1].r_offset; |
16024 | | /* We read the low GOT_TLS (or TOC16) insn because we |
16025 | | need to keep the destination reg. It may be |
16026 | | something other than the usual r3, and moved to r3 |
16027 | | before the call by intervening code. */ |
16028 | 0 | insn1 = bfd_get_32 (input_bfd, |
16029 | 0 | contents + rel->r_offset - d_offset); |
16030 | 0 | if ((tls_mask & tls_gd) != 0) |
16031 | 0 | { |
16032 | | /* IE */ |
16033 | 0 | insn1 &= (0x1f << 21) | (0x1f << 16); |
16034 | 0 | insn1 |= 58u << 26; /* ld */ |
16035 | 0 | insn2 = 0x7c636a14; /* add 3,3,13 */ |
16036 | 0 | if (offset != (bfd_vma) -1) |
16037 | 0 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
16038 | 0 | if (r_type == R_PPC64_TOC16 |
16039 | 0 | || r_type == R_PPC64_TOC16_LO) |
16040 | 0 | r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; |
16041 | 0 | else |
16042 | 0 | r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 1)) & 1) |
16043 | 0 | + R_PPC64_GOT_TPREL16_DS); |
16044 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16045 | 0 | } |
16046 | 0 | else |
16047 | 0 | { |
16048 | | /* LE */ |
16049 | 0 | insn1 &= 0x1f << 21; |
16050 | 0 | insn1 |= 0x3c0d0000; /* addis r,13,0 */ |
16051 | 0 | insn2 = 0x38630000; /* addi 3,3,0 */ |
16052 | 0 | if (tls_gd == 0) |
16053 | 0 | { |
16054 | | /* Was an LD reloc. */ |
16055 | 0 | r_symndx = STN_UNDEF; |
16056 | 0 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
16057 | 0 | } |
16058 | 0 | else if (toc_symndx != 0) |
16059 | 0 | { |
16060 | 0 | r_symndx = toc_symndx; |
16061 | 0 | rel->r_addend = toc_addend; |
16062 | 0 | } |
16063 | 0 | r_type = R_PPC64_TPREL16_HA; |
16064 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16065 | 0 | if (offset != (bfd_vma) -1) |
16066 | 0 | { |
16067 | 0 | rel[1].r_info = ELF64_R_INFO (r_symndx, |
16068 | 0 | R_PPC64_TPREL16_LO); |
16069 | 0 | rel[1].r_offset = offset + d_offset; |
16070 | 0 | rel[1].r_addend = rel->r_addend; |
16071 | 0 | } |
16072 | 0 | } |
16073 | 0 | bfd_put_32 (input_bfd, insn1, |
16074 | 0 | contents + rel->r_offset - d_offset); |
16075 | 0 | if (offset != (bfd_vma) -1 |
16076 | 0 | && offset_in_range (input_section, offset, 4)) |
16077 | 0 | { |
16078 | 0 | bfd_put_32 (input_bfd, insn2, contents + offset); |
16079 | 0 | if (offset_in_range (input_section, offset + 4, 4)) |
16080 | 0 | { |
16081 | 0 | insn2 = bfd_get_32 (input_bfd, contents + offset + 4); |
16082 | 0 | if (insn2 == LD_R2_0R1 + STK_TOC (htab)) |
16083 | 0 | bfd_put_32 (input_bfd, NOP, contents + offset + 4); |
16084 | 0 | } |
16085 | 0 | } |
16086 | 0 | if ((tls_mask & tls_gd) == 0 |
16087 | 0 | && (tls_gd == 0 || toc_symndx != 0)) |
16088 | 0 | { |
16089 | | /* We changed the symbol. Start over in order |
16090 | | to get h, sym, sec etc. right. */ |
16091 | 0 | goto again; |
16092 | 0 | } |
16093 | 0 | } |
16094 | 0 | break; |
16095 | | |
16096 | 0 | case R_PPC64_GOT_TLSGD_PCREL34: |
16097 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
16098 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
16099 | 0 | { |
16100 | 0 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
16101 | 0 | pinsn <<= 32; |
16102 | 0 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
16103 | 0 | if ((tls_mask & TLS_GDIE) != 0) |
16104 | 0 | { |
16105 | | /* IE, pla -> pld */ |
16106 | 0 | pinsn += (-2ULL << 56) + (57ULL << 26) - (14ULL << 26); |
16107 | 0 | r_type = R_PPC64_GOT_TPREL_PCREL34; |
16108 | 0 | } |
16109 | 0 | else |
16110 | 0 | { |
16111 | | /* LE, pla pcrel -> paddi r13 */ |
16112 | 0 | pinsn += (-1ULL << 52) + (13ULL << 16); |
16113 | 0 | r_type = R_PPC64_TPREL34; |
16114 | 0 | } |
16115 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16116 | 0 | bfd_put_32 (input_bfd, pinsn >> 32, |
16117 | 0 | contents + rel->r_offset); |
16118 | 0 | bfd_put_32 (input_bfd, pinsn & 0xffffffff, |
16119 | 0 | contents + rel->r_offset + 4); |
16120 | 0 | } |
16121 | 0 | break; |
16122 | | |
16123 | 0 | case R_PPC64_GOT_TLSLD_PCREL34: |
16124 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
16125 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
16126 | 0 | { |
16127 | 0 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
16128 | 0 | pinsn <<= 32; |
16129 | 0 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
16130 | 0 | pinsn += (-1ULL << 52) + (13ULL << 16); |
16131 | 0 | bfd_put_32 (input_bfd, pinsn >> 32, |
16132 | 0 | contents + rel->r_offset); |
16133 | 0 | bfd_put_32 (input_bfd, pinsn & 0xffffffff, |
16134 | 0 | contents + rel->r_offset + 4); |
16135 | 0 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
16136 | 0 | r_symndx = STN_UNDEF; |
16137 | 0 | r_type = R_PPC64_TPREL34; |
16138 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16139 | 0 | goto again; |
16140 | 0 | } |
16141 | 0 | break; |
16142 | | |
16143 | 0 | case R_PPC64_TLSGD: |
16144 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_GD) == 0 |
16145 | 0 | && rel + 1 < relend |
16146 | 0 | && offset_in_range (input_section, rel->r_offset, |
16147 | 0 | is_8byte_reloc (ELF64_R_TYPE (rel[1].r_info)) |
16148 | 0 | ? 8 : 4)) |
16149 | 0 | { |
16150 | 0 | unsigned int insn2; |
16151 | 0 | enum elf_ppc64_reloc_type r_type1 = ELF64_R_TYPE (rel[1].r_info); |
16152 | |
|
16153 | 0 | offset = rel->r_offset; |
16154 | 0 | if (is_plt_seq_reloc (r_type1)) |
16155 | 0 | { |
16156 | 0 | bfd_put_32 (output_bfd, NOP, contents + offset); |
16157 | 0 | if (r_type1 == R_PPC64_PLT_PCREL34 |
16158 | 0 | || r_type1 == R_PPC64_PLT_PCREL34_NOTOC) |
16159 | 0 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
16160 | 0 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
16161 | 0 | break; |
16162 | 0 | } |
16163 | | |
16164 | 0 | if (r_type1 == R_PPC64_PLTCALL) |
16165 | 0 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
16166 | |
|
16167 | 0 | if ((tls_mask & TLS_GDIE) != 0) |
16168 | 0 | { |
16169 | | /* IE */ |
16170 | 0 | r_type = R_PPC64_NONE; |
16171 | 0 | insn2 = 0x7c636a14; /* add 3,3,13 */ |
16172 | 0 | } |
16173 | 0 | else |
16174 | 0 | { |
16175 | | /* LE */ |
16176 | 0 | if (toc_symndx != 0) |
16177 | 0 | { |
16178 | 0 | r_symndx = toc_symndx; |
16179 | 0 | rel->r_addend = toc_addend; |
16180 | 0 | } |
16181 | 0 | if (r_type1 == R_PPC64_REL24_NOTOC |
16182 | 0 | || r_type1 == R_PPC64_REL24_P9NOTOC |
16183 | 0 | || r_type1 == R_PPC64_PLTCALL_NOTOC) |
16184 | 0 | { |
16185 | 0 | r_type = R_PPC64_NONE; |
16186 | 0 | insn2 = NOP; |
16187 | 0 | } |
16188 | 0 | else |
16189 | 0 | { |
16190 | 0 | rel->r_offset = offset + d_offset; |
16191 | 0 | r_type = R_PPC64_TPREL16_LO; |
16192 | 0 | insn2 = 0x38630000; /* addi 3,3,0 */ |
16193 | 0 | } |
16194 | 0 | } |
16195 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16196 | | /* Zap the reloc on the _tls_get_addr call too. */ |
16197 | 0 | BFD_ASSERT (offset == rel[1].r_offset); |
16198 | 0 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
16199 | 0 | bfd_put_32 (input_bfd, insn2, contents + offset); |
16200 | 0 | if ((tls_mask & TLS_GDIE) == 0 |
16201 | 0 | && toc_symndx != 0 |
16202 | 0 | && r_type != R_PPC64_NONE) |
16203 | 0 | goto again; |
16204 | 0 | } |
16205 | 0 | break; |
16206 | | |
16207 | 0 | case R_PPC64_TLSLD: |
16208 | 0 | if ((tls_mask & TLS_TLS) != 0 && (tls_mask & TLS_LD) == 0 |
16209 | 0 | && rel + 1 < relend |
16210 | 0 | && offset_in_range (input_section, rel->r_offset, |
16211 | 0 | is_8byte_reloc (ELF64_R_TYPE (rel[1].r_info)) |
16212 | 0 | ? 8 : 4)) |
16213 | 0 | { |
16214 | 0 | unsigned int insn2; |
16215 | 0 | enum elf_ppc64_reloc_type r_type1 = ELF64_R_TYPE (rel[1].r_info); |
16216 | |
|
16217 | 0 | offset = rel->r_offset; |
16218 | 0 | if (is_plt_seq_reloc (r_type1)) |
16219 | 0 | { |
16220 | 0 | bfd_put_32 (output_bfd, NOP, contents + offset); |
16221 | 0 | if (r_type1 == R_PPC64_PLT_PCREL34 |
16222 | 0 | || r_type1 == R_PPC64_PLT_PCREL34_NOTOC) |
16223 | 0 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
16224 | 0 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
16225 | 0 | break; |
16226 | 0 | } |
16227 | | |
16228 | 0 | if (r_type1 == R_PPC64_PLTCALL) |
16229 | 0 | bfd_put_32 (output_bfd, NOP, contents + offset + 4); |
16230 | |
|
16231 | 0 | if (r_type1 == R_PPC64_REL24_NOTOC |
16232 | 0 | || r_type1 == R_PPC64_REL24_P9NOTOC |
16233 | 0 | || r_type1 == R_PPC64_PLTCALL_NOTOC) |
16234 | 0 | { |
16235 | 0 | r_type = R_PPC64_NONE; |
16236 | 0 | insn2 = NOP; |
16237 | 0 | } |
16238 | 0 | else |
16239 | 0 | { |
16240 | 0 | rel->r_offset = offset + d_offset; |
16241 | 0 | r_symndx = STN_UNDEF; |
16242 | 0 | r_type = R_PPC64_TPREL16_LO; |
16243 | 0 | rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET; |
16244 | 0 | insn2 = 0x38630000; /* addi 3,3,0 */ |
16245 | 0 | } |
16246 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16247 | | /* Zap the reloc on the _tls_get_addr call too. */ |
16248 | 0 | BFD_ASSERT (offset == rel[1].r_offset); |
16249 | 0 | rel[1].r_info = ELF64_R_INFO (STN_UNDEF, R_PPC64_NONE); |
16250 | 0 | bfd_put_32 (input_bfd, insn2, contents + offset); |
16251 | 0 | if (r_type != R_PPC64_NONE) |
16252 | 0 | goto again; |
16253 | 0 | } |
16254 | 0 | break; |
16255 | | |
16256 | 0 | case R_PPC64_DTPMOD64: |
16257 | 0 | if (rel + 1 < relend |
16258 | 0 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
16259 | 0 | && rel[1].r_offset == rel->r_offset + 8) |
16260 | 0 | { |
16261 | 0 | if ((tls_mask & TLS_GD) == 0 |
16262 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
16263 | 0 | { |
16264 | 0 | rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); |
16265 | 0 | if ((tls_mask & TLS_GDIE) != 0) |
16266 | 0 | r_type = R_PPC64_TPREL64; |
16267 | 0 | else |
16268 | 0 | { |
16269 | 0 | bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
16270 | 0 | r_type = R_PPC64_NONE; |
16271 | 0 | } |
16272 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16273 | 0 | } |
16274 | 0 | } |
16275 | 0 | else |
16276 | 0 | { |
16277 | 0 | if ((tls_mask & TLS_LD) == 0 |
16278 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
16279 | 0 | { |
16280 | 0 | bfd_put_64 (output_bfd, 1, contents + rel->r_offset); |
16281 | 0 | r_type = R_PPC64_NONE; |
16282 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16283 | 0 | } |
16284 | 0 | } |
16285 | 0 | break; |
16286 | | |
16287 | 0 | case R_PPC64_TPREL64: |
16288 | 0 | if ((tls_mask & TLS_TPREL) == 0) |
16289 | 0 | { |
16290 | 0 | r_type = R_PPC64_NONE; |
16291 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16292 | 0 | } |
16293 | 0 | break; |
16294 | | |
16295 | 0 | case R_PPC64_ENTRY: |
16296 | 0 | relocation = TOCstart + htab->sec_info[input_section->id].toc_off; |
16297 | 0 | if (!bfd_link_pic (info) |
16298 | 0 | && !info->traditional_format |
16299 | 0 | && relocation + 0x80008000 <= 0xffffffff |
16300 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
16301 | 0 | { |
16302 | 0 | unsigned int insn1, insn2; |
16303 | |
|
16304 | 0 | insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
16305 | 0 | insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
16306 | 0 | if ((insn1 & ~0xfffc) == LD_R2_0R12 |
16307 | 0 | && insn2 == ADD_R2_R2_R12) |
16308 | 0 | { |
16309 | 0 | bfd_put_32 (input_bfd, |
16310 | 0 | LIS_R2 + PPC_HA (relocation), |
16311 | 0 | contents + rel->r_offset); |
16312 | 0 | bfd_put_32 (input_bfd, |
16313 | 0 | ADDI_R2_R2 + PPC_LO (relocation), |
16314 | 0 | contents + rel->r_offset + 4); |
16315 | 0 | } |
16316 | 0 | } |
16317 | 0 | else |
16318 | 0 | { |
16319 | 0 | relocation -= (rel->r_offset |
16320 | 0 | + input_section->output_offset |
16321 | 0 | + input_section->output_section->vma); |
16322 | 0 | if (relocation + 0x80008000 <= 0xffffffff |
16323 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
16324 | 0 | { |
16325 | 0 | unsigned int insn1, insn2; |
16326 | |
|
16327 | 0 | insn1 = bfd_get_32 (input_bfd, contents + rel->r_offset); |
16328 | 0 | insn2 = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
16329 | 0 | if ((insn1 & ~0xfffc) == LD_R2_0R12 |
16330 | 0 | && insn2 == ADD_R2_R2_R12) |
16331 | 0 | { |
16332 | 0 | bfd_put_32 (input_bfd, |
16333 | 0 | ADDIS_R2_R12 + PPC_HA (relocation), |
16334 | 0 | contents + rel->r_offset); |
16335 | 0 | bfd_put_32 (input_bfd, |
16336 | 0 | ADDI_R2_R2 + PPC_LO (relocation), |
16337 | 0 | contents + rel->r_offset + 4); |
16338 | 0 | } |
16339 | 0 | } |
16340 | 0 | } |
16341 | 0 | break; |
16342 | | |
16343 | 0 | case R_PPC64_REL16_HA: |
16344 | | /* If we are generating a non-PIC executable, edit |
16345 | | . 0: addis 2,12,.TOC.-0b@ha |
16346 | | . addi 2,2,.TOC.-0b@l |
16347 | | used by ELFv2 global entry points to set up r2, to |
16348 | | . lis 2,.TOC.@ha |
16349 | | . addi 2,2,.TOC.@l |
16350 | | if .TOC. is in range. */ |
16351 | 0 | if (!bfd_link_pic (info) |
16352 | 0 | && !info->traditional_format |
16353 | 0 | && !htab->opd_abi |
16354 | 0 | && rel->r_addend == d_offset |
16355 | 0 | && h != NULL && &h->elf == htab->elf.hgot |
16356 | 0 | && rel + 1 < relend |
16357 | 0 | && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_REL16_LO) |
16358 | 0 | && rel[1].r_offset == rel->r_offset + 4 |
16359 | 0 | && rel[1].r_addend == rel->r_addend + 4 |
16360 | 0 | && relocation + 0x80008000 <= 0xffffffff |
16361 | 0 | && offset_in_range (input_section, rel->r_offset - d_offset, 8)) |
16362 | 0 | { |
16363 | 0 | unsigned int insn1, insn2; |
16364 | 0 | offset = rel->r_offset - d_offset; |
16365 | 0 | insn1 = bfd_get_32 (input_bfd, contents + offset); |
16366 | 0 | insn2 = bfd_get_32 (input_bfd, contents + offset + 4); |
16367 | 0 | if ((insn1 & 0xffff0000) == ADDIS_R2_R12 |
16368 | 0 | && (insn2 & 0xffff0000) == ADDI_R2_R2) |
16369 | 0 | { |
16370 | 0 | r_type = R_PPC64_ADDR16_HA; |
16371 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16372 | 0 | rel->r_addend -= d_offset; |
16373 | 0 | rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_ADDR16_LO); |
16374 | 0 | rel[1].r_addend -= d_offset + 4; |
16375 | 0 | bfd_put_32 (input_bfd, LIS_R2, contents + offset); |
16376 | 0 | } |
16377 | 0 | } |
16378 | 0 | break; |
16379 | 0 | } |
16380 | | |
16381 | | /* Handle other relocations that tweak non-addend part of insn. */ |
16382 | 0 | insn = 0; |
16383 | 0 | max_br_offset = 1 << 25; |
16384 | 0 | addend = rel->r_addend; |
16385 | 0 | reloc_dest = DEST_NORMAL; |
16386 | 0 | switch (r_type) |
16387 | 0 | { |
16388 | 0 | default: |
16389 | 0 | break; |
16390 | | |
16391 | 0 | case R_PPC64_TOCSAVE: |
16392 | 0 | if (relocation + addend == (rel->r_offset |
16393 | 0 | + input_section->output_offset |
16394 | 0 | + input_section->output_section->vma) |
16395 | 0 | && tocsave_find (htab, NO_INSERT, |
16396 | 0 | &local_syms, rel, input_bfd) |
16397 | 0 | && offset_in_range (input_section, rel->r_offset, 4)) |
16398 | 0 | { |
16399 | 0 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
16400 | 0 | if (insn == NOP |
16401 | 0 | || insn == CROR_151515 || insn == CROR_313131) |
16402 | 0 | bfd_put_32 (input_bfd, |
16403 | 0 | STD_R2_0R1 + STK_TOC (htab), |
16404 | 0 | contents + rel->r_offset); |
16405 | 0 | } |
16406 | 0 | break; |
16407 | | |
16408 | | /* Branch taken prediction relocations. */ |
16409 | 0 | case R_PPC64_ADDR14_BRTAKEN: |
16410 | 0 | case R_PPC64_REL14_BRTAKEN: |
16411 | 0 | insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
16412 | | /* Fall through. */ |
16413 | | |
16414 | | /* Branch not taken prediction relocations. */ |
16415 | 0 | case R_PPC64_ADDR14_BRNTAKEN: |
16416 | 0 | case R_PPC64_REL14_BRNTAKEN: |
16417 | 0 | if (!offset_in_range (input_section, rel->r_offset, 4)) |
16418 | 0 | break; |
16419 | 0 | insn |= bfd_get_32 (input_bfd, |
16420 | 0 | contents + rel->r_offset) & ~(0x01 << 21); |
16421 | | /* Fall through. */ |
16422 | |
|
16423 | 0 | case R_PPC64_REL14: |
16424 | 0 | max_br_offset = 1 << 15; |
16425 | | /* Fall through. */ |
16426 | |
|
16427 | 0 | case R_PPC64_REL24: |
16428 | 0 | case R_PPC64_REL24_NOTOC: |
16429 | 0 | case R_PPC64_REL24_P9NOTOC: |
16430 | 0 | case R_PPC64_PLTCALL: |
16431 | 0 | case R_PPC64_PLTCALL_NOTOC: |
16432 | | /* Calls to functions with a different TOC, such as calls to |
16433 | | shared objects, need to alter the TOC pointer. This is |
16434 | | done using a linkage stub. A REL24 branching to these |
16435 | | linkage stubs needs to be followed by a nop, as the nop |
16436 | | will be replaced with an instruction to restore the TOC |
16437 | | base pointer. */ |
16438 | 0 | fdh = h; |
16439 | 0 | if (h != NULL |
16440 | 0 | && h->oh != NULL |
16441 | 0 | && h->oh->is_func_descriptor) |
16442 | 0 | fdh = ppc_follow_link (h->oh); |
16443 | 0 | stub_entry = ppc_get_stub_entry (input_section, sec, fdh, &orig_rel, |
16444 | 0 | htab); |
16445 | 0 | if ((r_type == R_PPC64_PLTCALL |
16446 | 0 | || r_type == R_PPC64_PLTCALL_NOTOC) |
16447 | 0 | && stub_entry != NULL |
16448 | 0 | && stub_entry->type.main == ppc_stub_plt_call) |
16449 | 0 | stub_entry = NULL; |
16450 | |
|
16451 | 0 | if (stub_entry != NULL |
16452 | 0 | && (stub_entry->type.main == ppc_stub_plt_call |
16453 | 0 | || stub_entry->type.r2save)) |
16454 | 0 | { |
16455 | 0 | bool can_plt_call = false; |
16456 | |
|
16457 | 0 | if (r_type == R_PPC64_REL24_NOTOC |
16458 | 0 | || r_type == R_PPC64_REL24_P9NOTOC) |
16459 | 0 | { |
16460 | | /* NOTOC calls don't need to restore r2. */ |
16461 | 0 | can_plt_call = true; |
16462 | 0 | } |
16463 | 0 | else if (stub_entry->type.main == ppc_stub_plt_call |
16464 | 0 | && !htab->opd_abi |
16465 | 0 | && htab->params->plt_localentry0 != 0 |
16466 | 0 | && h != NULL |
16467 | 0 | && is_elfv2_localentry0 (&h->elf)) |
16468 | 0 | { |
16469 | | /* The function doesn't use or change r2. */ |
16470 | 0 | can_plt_call = true; |
16471 | 0 | } |
16472 | | |
16473 | | /* All of these stubs may modify r2, so there must be a |
16474 | | branch and link followed by a nop. The nop is |
16475 | | replaced by an insn to restore r2. */ |
16476 | 0 | else if (offset_in_range (input_section, rel->r_offset, 8)) |
16477 | 0 | { |
16478 | 0 | unsigned long br; |
16479 | |
|
16480 | 0 | br = bfd_get_32 (input_bfd, |
16481 | 0 | contents + rel->r_offset); |
16482 | 0 | if ((br & 1) != 0) |
16483 | 0 | { |
16484 | 0 | unsigned long nop; |
16485 | |
|
16486 | 0 | nop = bfd_get_32 (input_bfd, |
16487 | 0 | contents + rel->r_offset + 4); |
16488 | 0 | if (nop == LD_R2_0R1 + STK_TOC (htab)) |
16489 | 0 | can_plt_call = true; |
16490 | 0 | else if (nop == NOP |
16491 | 0 | || nop == CROR_151515 |
16492 | 0 | || nop == CROR_313131) |
16493 | 0 | { |
16494 | 0 | if (h != NULL |
16495 | 0 | && is_tls_get_addr (&h->elf, htab) |
16496 | 0 | && htab->params->tls_get_addr_opt) |
16497 | 0 | { |
16498 | | /* Special stub used, leave nop alone. */ |
16499 | 0 | } |
16500 | 0 | else |
16501 | 0 | bfd_put_32 (input_bfd, |
16502 | 0 | LD_R2_0R1 + STK_TOC (htab), |
16503 | 0 | contents + rel->r_offset + 4); |
16504 | 0 | can_plt_call = true; |
16505 | 0 | } |
16506 | 0 | } |
16507 | 0 | } |
16508 | |
|
16509 | 0 | if (!can_plt_call && h != NULL) |
16510 | 0 | { |
16511 | 0 | const char *name = h->elf.root.root.string; |
16512 | |
|
16513 | 0 | if (*name == '.') |
16514 | 0 | ++name; |
16515 | |
|
16516 | 0 | if (startswith (name, "__libc_start_main") |
16517 | 0 | && (name[17] == 0 || name[17] == '@')) |
16518 | 0 | { |
16519 | | /* Allow crt1 branch to go via a toc adjusting |
16520 | | stub. Other calls that never return could do |
16521 | | the same, if we could detect such. */ |
16522 | 0 | can_plt_call = true; |
16523 | 0 | } |
16524 | 0 | } |
16525 | |
|
16526 | 0 | if (!can_plt_call) |
16527 | 0 | { |
16528 | | /* g++ as of 20130507 emits self-calls without a |
16529 | | following nop. This is arguably wrong since we |
16530 | | have conflicting information. On the one hand a |
16531 | | global symbol and on the other a local call |
16532 | | sequence, but don't error for this special case. |
16533 | | It isn't possible to cheaply verify we have |
16534 | | exactly such a call. Allow all calls to the same |
16535 | | section. */ |
16536 | 0 | asection *code_sec = sec; |
16537 | |
|
16538 | 0 | if (get_opd_info (sec) != NULL) |
16539 | 0 | { |
16540 | 0 | bfd_vma off = (relocation + addend |
16541 | 0 | - sec->output_section->vma |
16542 | 0 | - sec->output_offset); |
16543 | |
|
16544 | 0 | opd_entry_value (sec, off, &code_sec, NULL, false); |
16545 | 0 | } |
16546 | 0 | if (code_sec == input_section) |
16547 | 0 | can_plt_call = true; |
16548 | 0 | } |
16549 | |
|
16550 | 0 | if (!can_plt_call) |
16551 | 0 | { |
16552 | 0 | if (stub_entry->type.main == ppc_stub_plt_call) |
16553 | 0 | info->callbacks->einfo |
16554 | | /* xgettext:c-format */ |
16555 | 0 | (_("%H: call to `%pT' lacks nop, can't restore toc; " |
16556 | 0 | "(plt call stub)\n"), |
16557 | 0 | input_bfd, input_section, rel->r_offset, sym_name); |
16558 | 0 | else |
16559 | 0 | info->callbacks->einfo |
16560 | | /* xgettext:c-format */ |
16561 | 0 | (_("%H: call to `%pT' lacks nop, can't restore toc; " |
16562 | 0 | "(toc save/adjust stub)\n"), |
16563 | 0 | input_bfd, input_section, rel->r_offset, sym_name); |
16564 | |
|
16565 | 0 | bfd_set_error (bfd_error_bad_value); |
16566 | 0 | ret = false; |
16567 | 0 | } |
16568 | |
|
16569 | 0 | if (can_plt_call |
16570 | 0 | && stub_entry->type.main == ppc_stub_plt_call) |
16571 | 0 | unresolved_reloc = false; |
16572 | 0 | } |
16573 | |
|
16574 | 0 | if ((stub_entry == NULL |
16575 | 0 | || stub_entry->type.main == ppc_stub_long_branch |
16576 | 0 | || stub_entry->type.main == ppc_stub_plt_branch) |
16577 | 0 | && get_opd_info (sec) != NULL) |
16578 | 0 | { |
16579 | | /* The branch destination is the value of the opd entry. */ |
16580 | 0 | bfd_vma off = (relocation + addend |
16581 | 0 | - sec->output_section->vma |
16582 | 0 | - sec->output_offset); |
16583 | 0 | bfd_vma dest = opd_entry_value (sec, off, NULL, NULL, false); |
16584 | 0 | if (dest != (bfd_vma) -1) |
16585 | 0 | { |
16586 | 0 | relocation = dest; |
16587 | 0 | addend = 0; |
16588 | 0 | reloc_dest = DEST_OPD; |
16589 | 0 | } |
16590 | 0 | } |
16591 | | |
16592 | | /* If the branch is out of reach we ought to have a long |
16593 | | branch stub. */ |
16594 | 0 | from = (rel->r_offset |
16595 | 0 | + input_section->output_offset |
16596 | 0 | + input_section->output_section->vma); |
16597 | |
|
16598 | 0 | relocation += PPC64_LOCAL_ENTRY_OFFSET (fdh |
16599 | 0 | ? fdh->elf.other |
16600 | 0 | : sym->st_other); |
16601 | |
|
16602 | 0 | if (stub_entry != NULL |
16603 | 0 | && (stub_entry->type.main == ppc_stub_long_branch |
16604 | 0 | || stub_entry->type.main == ppc_stub_plt_branch)) |
16605 | 0 | { |
16606 | 0 | if (stub_entry->type.sub == ppc_stub_toc |
16607 | 0 | && !stub_entry->type.r2save |
16608 | 0 | && (r_type == R_PPC64_ADDR14_BRTAKEN |
16609 | 0 | || r_type == R_PPC64_ADDR14_BRNTAKEN |
16610 | 0 | || (relocation + addend - from + max_br_offset |
16611 | 0 | < 2 * max_br_offset))) |
16612 | | /* Don't use the stub if this branch is in range. */ |
16613 | 0 | stub_entry = NULL; |
16614 | |
|
16615 | 0 | if (stub_entry != NULL |
16616 | 0 | && stub_entry->type.sub >= ppc_stub_notoc |
16617 | 0 | && ((r_type != R_PPC64_REL24_NOTOC |
16618 | 0 | && r_type != R_PPC64_REL24_P9NOTOC) |
16619 | 0 | || ((fdh ? fdh->elf.other : sym->st_other) |
16620 | 0 | & STO_PPC64_LOCAL_MASK) <= 1 << STO_PPC64_LOCAL_BIT) |
16621 | 0 | && (relocation + addend - from + max_br_offset |
16622 | 0 | < 2 * max_br_offset)) |
16623 | 0 | stub_entry = NULL; |
16624 | |
|
16625 | 0 | if (stub_entry != NULL |
16626 | 0 | && stub_entry->type.r2save |
16627 | 0 | && (r_type == R_PPC64_REL24_NOTOC |
16628 | 0 | || r_type == R_PPC64_REL24_P9NOTOC) |
16629 | 0 | && (relocation + addend - from + max_br_offset |
16630 | 0 | < 2 * max_br_offset)) |
16631 | 0 | stub_entry = NULL; |
16632 | 0 | } |
16633 | |
|
16634 | 0 | if (stub_entry != NULL) |
16635 | 0 | { |
16636 | | /* Munge up the value and addend so that we call the stub |
16637 | | rather than the procedure directly. */ |
16638 | 0 | asection *stub_sec = stub_entry->group->stub_sec; |
16639 | |
|
16640 | 0 | if (stub_entry->type.main == ppc_stub_save_res) |
16641 | 0 | relocation += (stub_sec->output_offset |
16642 | 0 | + stub_sec->output_section->vma |
16643 | 0 | + stub_sec->size - htab->sfpr->size |
16644 | 0 | - htab->sfpr->output_offset |
16645 | 0 | - htab->sfpr->output_section->vma); |
16646 | 0 | else |
16647 | 0 | relocation = (stub_entry->stub_offset |
16648 | 0 | + stub_sec->output_offset |
16649 | 0 | + stub_sec->output_section->vma); |
16650 | 0 | addend = 0; |
16651 | 0 | reloc_dest = DEST_STUB; |
16652 | |
|
16653 | 0 | if (((stub_entry->type.r2save |
16654 | 0 | && (r_type == R_PPC64_REL24_NOTOC |
16655 | 0 | || r_type == R_PPC64_REL24_P9NOTOC)) |
16656 | 0 | || ((stub_entry->type.main == ppc_stub_plt_call |
16657 | 0 | && (ALWAYS_EMIT_R2SAVE || stub_entry->type.r2save)) |
16658 | 0 | && rel + 1 < relend |
16659 | 0 | && rel[1].r_offset == rel->r_offset + 4 |
16660 | 0 | && ELF64_R_TYPE (rel[1].r_info) == R_PPC64_TOCSAVE)) |
16661 | 0 | && !(stub_entry->type.main == ppc_stub_plt_call |
16662 | 0 | && htab->params->tls_get_addr_opt |
16663 | 0 | && h != NULL |
16664 | 0 | && is_tls_get_addr (&h->elf, htab))) |
16665 | 0 | { |
16666 | | /* Skip over the r2 store at the start of the stub. */ |
16667 | 0 | relocation += 4; |
16668 | 0 | } |
16669 | |
|
16670 | 0 | if ((r_type == R_PPC64_REL24_NOTOC |
16671 | 0 | || r_type == R_PPC64_REL24_P9NOTOC) |
16672 | 0 | && stub_entry->type.main == ppc_stub_plt_call |
16673 | 0 | && stub_entry->type.sub >= ppc_stub_notoc) |
16674 | 0 | htab->notoc_plt = 1; |
16675 | 0 | } |
16676 | |
|
16677 | 0 | if (insn != 0) |
16678 | 0 | { |
16679 | 0 | if (is_isa_v2) |
16680 | 0 | { |
16681 | | /* Set 'a' bit. This is 0b00010 in BO field for branch |
16682 | | on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
16683 | | for branch on CTR insns (BO == 1a00t or 1a01t). */ |
16684 | 0 | if ((insn & (0x14 << 21)) == (0x04 << 21)) |
16685 | 0 | insn |= 0x02 << 21; |
16686 | 0 | else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
16687 | 0 | insn |= 0x08 << 21; |
16688 | 0 | else |
16689 | 0 | break; |
16690 | 0 | } |
16691 | 0 | else |
16692 | 0 | { |
16693 | | /* Invert 'y' bit if not the default. */ |
16694 | 0 | if ((bfd_signed_vma) (relocation + addend - from) < 0) |
16695 | 0 | insn ^= 0x01 << 21; |
16696 | 0 | } |
16697 | | |
16698 | 0 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
16699 | 0 | } |
16700 | | |
16701 | | /* NOP out calls to undefined weak functions. |
16702 | | We can thus call a weak function without first |
16703 | | checking whether the function is defined. */ |
16704 | 0 | else if (h != NULL |
16705 | 0 | && h->elf.root.type == bfd_link_hash_undefweak |
16706 | 0 | && h->elf.dynindx == -1 |
16707 | 0 | && (r_type == R_PPC64_REL24 |
16708 | 0 | || r_type == R_PPC64_REL24_NOTOC |
16709 | 0 | || r_type == R_PPC64_REL24_P9NOTOC) |
16710 | 0 | && relocation == 0 |
16711 | 0 | && addend == 0 |
16712 | 0 | && offset_in_range (input_section, rel->r_offset, 4)) |
16713 | 0 | { |
16714 | 0 | bfd_put_32 (input_bfd, NOP, contents + rel->r_offset); |
16715 | 0 | goto copy_reloc; |
16716 | 0 | } |
16717 | 0 | break; |
16718 | | |
16719 | 0 | case R_PPC64_GOT16_DS: |
16720 | 0 | if ((h ? h->elf.type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC |
16721 | 0 | || (bfd_link_pic (info) |
16722 | 0 | && sec == bfd_abs_section_ptr) |
16723 | 0 | || !htab->do_toc_opt) |
16724 | 0 | break; |
16725 | 0 | from = TOCstart + htab->sec_info[input_section->id].toc_off; |
16726 | 0 | if (relocation + addend - from + 0x8000 < 0x10000 |
16727 | 0 | && sec != NULL |
16728 | 0 | && sec->output_section != NULL |
16729 | 0 | && !discarded_section (sec) |
16730 | 0 | && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
16731 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
16732 | 0 | { |
16733 | 0 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
16734 | 0 | if ((insn & (0x3fu << 26 | 0x3)) == 58u << 26 /* ld */) |
16735 | 0 | { |
16736 | 0 | insn += (14u << 26) - (58u << 26); |
16737 | 0 | bfd_put_32 (input_bfd, insn, contents + (rel->r_offset & ~3)); |
16738 | 0 | r_type = R_PPC64_TOC16; |
16739 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16740 | 0 | } |
16741 | 0 | } |
16742 | 0 | break; |
16743 | | |
16744 | 0 | case R_PPC64_GOT16_LO_DS: |
16745 | 0 | case R_PPC64_GOT16_HA: |
16746 | 0 | if ((h ? h->elf.type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC |
16747 | 0 | || (bfd_link_pic (info) |
16748 | 0 | && sec == bfd_abs_section_ptr) |
16749 | 0 | || !htab->do_toc_opt) |
16750 | 0 | break; |
16751 | 0 | from = TOCstart + htab->sec_info[input_section->id].toc_off; |
16752 | 0 | if (relocation + addend - from + 0x80008000ULL < 0x100000000ULL |
16753 | 0 | && sec != NULL |
16754 | 0 | && sec->output_section != NULL |
16755 | 0 | && !discarded_section (sec) |
16756 | 0 | && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
16757 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
16758 | 0 | { |
16759 | 0 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
16760 | 0 | if (r_type == R_PPC64_GOT16_LO_DS |
16761 | 0 | && (insn & (0x3fu << 26 | 0x3)) == 58u << 26 /* ld */) |
16762 | 0 | { |
16763 | 0 | insn += (14u << 26) - (58u << 26); |
16764 | 0 | bfd_put_32 (input_bfd, insn, contents + (rel->r_offset & ~3)); |
16765 | 0 | r_type = R_PPC64_TOC16_LO; |
16766 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16767 | 0 | } |
16768 | 0 | else if (r_type == R_PPC64_GOT16_HA |
16769 | 0 | && (insn & (0x3fu << 26)) == 15u << 26 /* addis */) |
16770 | 0 | { |
16771 | 0 | r_type = R_PPC64_TOC16_HA; |
16772 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16773 | 0 | } |
16774 | 0 | } |
16775 | 0 | break; |
16776 | | |
16777 | 0 | case R_PPC64_GOT_PCREL34: |
16778 | 0 | if ((h ? h->elf.type : ELF_ST_TYPE (sym->st_info)) == STT_GNU_IFUNC |
16779 | 0 | || (bfd_link_pic (info) |
16780 | 0 | && sec == bfd_abs_section_ptr) |
16781 | 0 | || !htab->do_toc_opt) |
16782 | 0 | break; |
16783 | 0 | from = (rel->r_offset |
16784 | 0 | + input_section->output_section->vma |
16785 | 0 | + input_section->output_offset); |
16786 | 0 | if (!(relocation - from + (1ULL << 33) < 1ULL << 34 |
16787 | 0 | && sec != NULL |
16788 | 0 | && sec->output_section != NULL |
16789 | 0 | && !discarded_section (sec) |
16790 | 0 | && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
16791 | 0 | && offset_in_range (input_section, rel->r_offset, 8))) |
16792 | 0 | break; |
16793 | | |
16794 | 0 | offset = rel->r_offset; |
16795 | 0 | pinsn = bfd_get_32 (input_bfd, contents + offset); |
16796 | 0 | pinsn <<= 32; |
16797 | 0 | pinsn |= bfd_get_32 (input_bfd, contents + offset + 4); |
16798 | 0 | if ((pinsn & ((-1ULL << 50) | (63ULL << 26))) |
16799 | 0 | != ((1ULL << 58) | (1ULL << 52) | (57ULL << 26) /* pld */)) |
16800 | 0 | break; |
16801 | | |
16802 | | /* Replace with paddi. */ |
16803 | 0 | pinsn += (2ULL << 56) + (14ULL << 26) - (57ULL << 26); |
16804 | 0 | r_type = R_PPC64_PCREL34; |
16805 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
16806 | 0 | bfd_put_32 (input_bfd, pinsn >> 32, contents + offset); |
16807 | 0 | bfd_put_32 (input_bfd, pinsn, contents + offset + 4); |
16808 | | /* Fall through. */ |
16809 | |
|
16810 | 0 | case R_PPC64_PCREL34: |
16811 | 0 | if (!htab->params->no_pcrel_opt |
16812 | 0 | && rel + 1 < relend |
16813 | 0 | && rel[1].r_offset == rel->r_offset |
16814 | 0 | && rel[1].r_info == ELF64_R_INFO (0, R_PPC64_PCREL_OPT) |
16815 | 0 | && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, &h->elf)) |
16816 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
16817 | 0 | { |
16818 | 0 | offset = rel->r_offset; |
16819 | 0 | pinsn = bfd_get_32 (input_bfd, contents + offset); |
16820 | 0 | pinsn <<= 32; |
16821 | 0 | pinsn |= bfd_get_32 (input_bfd, contents + offset + 4); |
16822 | 0 | if ((pinsn & ((-1ULL << 50) | (63ULL << 26))) |
16823 | 0 | == ((1ULL << 58) | (2ULL << 56) | (1ULL << 52) |
16824 | 0 | | (14ULL << 26) /* paddi */)) |
16825 | 0 | { |
16826 | 0 | bfd_vma off2 = rel[1].r_addend; |
16827 | 0 | if (off2 == 0) |
16828 | | /* zero means next insn. */ |
16829 | 0 | off2 = 8; |
16830 | 0 | off2 += offset; |
16831 | 0 | if (offset_in_range (input_section, off2, 4)) |
16832 | 0 | { |
16833 | 0 | uint64_t pinsn2; |
16834 | 0 | bfd_signed_vma addend_off; |
16835 | 0 | pinsn2 = bfd_get_32 (input_bfd, contents + off2); |
16836 | 0 | pinsn2 <<= 32; |
16837 | 0 | if ((pinsn2 & (63ULL << 58)) == 1ULL << 58) |
16838 | 0 | { |
16839 | 0 | if (!offset_in_range (input_section, off2, 8)) |
16840 | 0 | break; |
16841 | 0 | pinsn2 |= bfd_get_32 (input_bfd, |
16842 | 0 | contents + off2 + 4); |
16843 | 0 | } |
16844 | 0 | if (xlate_pcrel_opt (&pinsn, &pinsn2, &addend_off)) |
16845 | 0 | { |
16846 | 0 | addend += addend_off; |
16847 | 0 | rel->r_addend = addend; |
16848 | 0 | bfd_put_32 (input_bfd, pinsn >> 32, |
16849 | 0 | contents + offset); |
16850 | 0 | bfd_put_32 (input_bfd, pinsn, |
16851 | 0 | contents + offset + 4); |
16852 | 0 | bfd_put_32 (input_bfd, pinsn2 >> 32, |
16853 | 0 | contents + off2); |
16854 | 0 | if ((pinsn2 & (63ULL << 58)) == 1ULL << 58) |
16855 | 0 | bfd_put_32 (input_bfd, pinsn2, |
16856 | 0 | contents + off2 + 4); |
16857 | 0 | } |
16858 | 0 | } |
16859 | 0 | } |
16860 | 0 | } |
16861 | 0 | break; |
16862 | 0 | } |
16863 | | |
16864 | 0 | tls_type = 0; |
16865 | 0 | save_unresolved_reloc = unresolved_reloc; |
16866 | 0 | switch (r_type) |
16867 | 0 | { |
16868 | 0 | default: |
16869 | | /* xgettext:c-format */ |
16870 | 0 | _bfd_error_handler (_("%pB: %s unsupported"), |
16871 | 0 | input_bfd, ppc64_elf_howto_table[r_type]->name); |
16872 | |
|
16873 | 0 | bfd_set_error (bfd_error_bad_value); |
16874 | 0 | ret = false; |
16875 | 0 | goto copy_reloc; |
16876 | | |
16877 | 0 | case R_PPC64_NONE: |
16878 | 0 | case R_PPC64_TLS: |
16879 | 0 | case R_PPC64_TLSGD: |
16880 | 0 | case R_PPC64_TLSLD: |
16881 | 0 | case R_PPC64_TOCSAVE: |
16882 | 0 | case R_PPC64_GNU_VTINHERIT: |
16883 | 0 | case R_PPC64_GNU_VTENTRY: |
16884 | 0 | case R_PPC64_ENTRY: |
16885 | 0 | case R_PPC64_PCREL_OPT: |
16886 | 0 | goto copy_reloc; |
16887 | | |
16888 | | /* GOT16 relocations. Like an ADDR16 using the symbol's |
16889 | | address in the GOT as relocation value instead of the |
16890 | | symbol's value itself. Also, create a GOT entry for the |
16891 | | symbol and put the symbol value there. */ |
16892 | 0 | case R_PPC64_GOT_TLSGD16: |
16893 | 0 | case R_PPC64_GOT_TLSGD16_LO: |
16894 | 0 | case R_PPC64_GOT_TLSGD16_HI: |
16895 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
16896 | 0 | case R_PPC64_GOT_TLSGD_PCREL34: |
16897 | 0 | tls_type = TLS_TLS | TLS_GD; |
16898 | 0 | goto dogot; |
16899 | | |
16900 | 0 | case R_PPC64_GOT_TLSLD16: |
16901 | 0 | case R_PPC64_GOT_TLSLD16_LO: |
16902 | 0 | case R_PPC64_GOT_TLSLD16_HI: |
16903 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
16904 | 0 | case R_PPC64_GOT_TLSLD_PCREL34: |
16905 | 0 | tls_type = TLS_TLS | TLS_LD; |
16906 | 0 | goto dogot; |
16907 | | |
16908 | 0 | case R_PPC64_GOT_TPREL16_DS: |
16909 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
16910 | 0 | case R_PPC64_GOT_TPREL16_HI: |
16911 | 0 | case R_PPC64_GOT_TPREL16_HA: |
16912 | 0 | case R_PPC64_GOT_TPREL_PCREL34: |
16913 | 0 | tls_type = TLS_TLS | TLS_TPREL; |
16914 | 0 | goto dogot; |
16915 | | |
16916 | 0 | case R_PPC64_GOT_DTPREL16_DS: |
16917 | 0 | case R_PPC64_GOT_DTPREL16_LO_DS: |
16918 | 0 | case R_PPC64_GOT_DTPREL16_HI: |
16919 | 0 | case R_PPC64_GOT_DTPREL16_HA: |
16920 | 0 | case R_PPC64_GOT_DTPREL_PCREL34: |
16921 | 0 | tls_type = TLS_TLS | TLS_DTPREL; |
16922 | 0 | goto dogot; |
16923 | | |
16924 | 0 | case R_PPC64_GOT16: |
16925 | 0 | case R_PPC64_GOT16_LO: |
16926 | 0 | case R_PPC64_GOT16_HI: |
16927 | 0 | case R_PPC64_GOT16_HA: |
16928 | 0 | case R_PPC64_GOT16_DS: |
16929 | 0 | case R_PPC64_GOT16_LO_DS: |
16930 | 0 | case R_PPC64_GOT_PCREL34: |
16931 | 0 | dogot: |
16932 | 0 | { |
16933 | | /* Relocation is to the entry for this symbol in the global |
16934 | | offset table. */ |
16935 | 0 | asection *got; |
16936 | 0 | bfd_vma *offp; |
16937 | 0 | bfd_vma off; |
16938 | 0 | unsigned long indx = 0; |
16939 | 0 | struct got_entry *ent; |
16940 | |
|
16941 | 0 | if (tls_type == (TLS_TLS | TLS_LD) |
16942 | 0 | && (h == NULL || SYMBOL_REFERENCES_LOCAL (info, &h->elf))) |
16943 | 0 | ent = ppc64_tlsld_got (input_bfd); |
16944 | 0 | else |
16945 | 0 | { |
16946 | 0 | if (h != NULL) |
16947 | 0 | { |
16948 | 0 | if (!htab->elf.dynamic_sections_created |
16949 | 0 | || h->elf.dynindx == -1 |
16950 | 0 | || SYMBOL_REFERENCES_LOCAL (info, &h->elf) |
16951 | 0 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)) |
16952 | | /* This is actually a static link, or it is a |
16953 | | -Bsymbolic link and the symbol is defined |
16954 | | locally, or the symbol was forced to be local |
16955 | | because of a version file. */ |
16956 | 0 | ; |
16957 | 0 | else |
16958 | 0 | { |
16959 | 0 | indx = h->elf.dynindx; |
16960 | 0 | unresolved_reloc = false; |
16961 | 0 | } |
16962 | 0 | ent = h->elf.got.glist; |
16963 | 0 | } |
16964 | 0 | else |
16965 | 0 | { |
16966 | 0 | if (local_got_ents == NULL) |
16967 | 0 | abort (); |
16968 | 0 | ent = local_got_ents[r_symndx]; |
16969 | 0 | } |
16970 | | |
16971 | 0 | for (; ent != NULL; ent = ent->next) |
16972 | 0 | if (ent->addend == orig_rel.r_addend |
16973 | 0 | && ent->owner == input_bfd |
16974 | 0 | && ent->tls_type == tls_type) |
16975 | 0 | break; |
16976 | 0 | } |
16977 | | |
16978 | 0 | if (ent == NULL) |
16979 | 0 | abort (); |
16980 | 0 | if (ent->is_indirect) |
16981 | 0 | ent = ent->got.ent; |
16982 | 0 | offp = &ent->got.offset; |
16983 | 0 | got = ppc64_elf_tdata (ent->owner)->got; |
16984 | 0 | if (got == NULL) |
16985 | 0 | abort (); |
16986 | | |
16987 | | /* The offset must always be a multiple of 8. We use the |
16988 | | least significant bit to record whether we have already |
16989 | | processed this entry. */ |
16990 | 0 | off = *offp; |
16991 | 0 | if ((off & 1) != 0) |
16992 | 0 | off &= ~1; |
16993 | 0 | else |
16994 | 0 | { |
16995 | | /* Generate relocs for the dynamic linker, except in |
16996 | | the case of TLSLD where we'll use one entry per |
16997 | | module. */ |
16998 | 0 | asection *relgot; |
16999 | 0 | bool ifunc; |
17000 | |
|
17001 | 0 | *offp = off | 1; |
17002 | 0 | relgot = NULL; |
17003 | 0 | ifunc = (h != NULL |
17004 | 0 | ? h->elf.type == STT_GNU_IFUNC |
17005 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC); |
17006 | 0 | if (ifunc) |
17007 | 0 | { |
17008 | 0 | relgot = htab->elf.irelplt; |
17009 | 0 | if (indx == 0 || is_static_defined (&h->elf)) |
17010 | 0 | htab->elf.ifunc_resolvers = true; |
17011 | 0 | } |
17012 | 0 | else if (indx != 0 |
17013 | 0 | || (bfd_link_pic (info) |
17014 | 0 | && (h == NULL |
17015 | 0 | || !UNDEFWEAK_NO_DYNAMIC_RELOC (info, &h->elf)) |
17016 | 0 | && !(tls_type != 0 |
17017 | 0 | && bfd_link_executable (info) |
17018 | 0 | && (h == NULL |
17019 | 0 | || SYMBOL_REFERENCES_LOCAL (info, |
17020 | 0 | &h->elf))) |
17021 | 0 | && (h != NULL |
17022 | 0 | ? !bfd_is_abs_symbol (&h->elf.root) |
17023 | 0 | : sym->st_shndx != SHN_ABS))) |
17024 | | |
17025 | 0 | relgot = ppc64_elf_tdata (ent->owner)->relgot; |
17026 | 0 | if (relgot != NULL) |
17027 | 0 | { |
17028 | 0 | outrel.r_offset = (got->output_section->vma |
17029 | 0 | + got->output_offset |
17030 | 0 | + off); |
17031 | 0 | outrel.r_addend = orig_rel.r_addend; |
17032 | 0 | if (tls_type & (TLS_LD | TLS_GD)) |
17033 | 0 | { |
17034 | 0 | outrel.r_addend = 0; |
17035 | 0 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); |
17036 | 0 | if (tls_type == (TLS_TLS | TLS_GD)) |
17037 | 0 | { |
17038 | 0 | BFD_ASSERT (count_and_swap_reloc_out (output_bfd, |
17039 | 0 | &outrel, |
17040 | 0 | relgot)); |
17041 | 0 | outrel.r_offset += 8; |
17042 | 0 | outrel.r_addend = orig_rel.r_addend; |
17043 | 0 | outrel.r_info |
17044 | 0 | = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
17045 | 0 | } |
17046 | 0 | } |
17047 | 0 | else if (tls_type == (TLS_TLS | TLS_DTPREL)) |
17048 | 0 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
17049 | 0 | else if (tls_type == (TLS_TLS | TLS_TPREL)) |
17050 | 0 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); |
17051 | 0 | else if (indx != 0) |
17052 | 0 | outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); |
17053 | 0 | else |
17054 | 0 | { |
17055 | 0 | if (ifunc) |
17056 | 0 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
17057 | 0 | else |
17058 | 0 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
17059 | | |
17060 | | /* Write the .got section contents for the sake |
17061 | | of prelink. */ |
17062 | 0 | loc = got->contents + off; |
17063 | 0 | bfd_put_64 (output_bfd, outrel.r_addend + relocation, |
17064 | 0 | loc); |
17065 | 0 | } |
17066 | |
|
17067 | 0 | if (indx == 0 && tls_type != (TLS_TLS | TLS_LD)) |
17068 | 0 | { |
17069 | 0 | outrel.r_addend += relocation; |
17070 | 0 | if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
17071 | 0 | { |
17072 | 0 | if (htab->elf.tls_sec == NULL) |
17073 | 0 | outrel.r_addend = 0; |
17074 | 0 | else |
17075 | 0 | outrel.r_addend -= htab->elf.tls_sec->vma; |
17076 | 0 | } |
17077 | 0 | } |
17078 | 0 | if (!(info->enable_dt_relr |
17079 | 0 | && ELF64_R_TYPE (outrel.r_info) == R_PPC64_RELATIVE)) |
17080 | 0 | BFD_ASSERT (count_and_swap_reloc_out (output_bfd, |
17081 | 0 | &outrel, relgot)); |
17082 | 0 | } |
17083 | | |
17084 | | /* Init the .got section contents here if we're not |
17085 | | emitting a reloc. */ |
17086 | 0 | else |
17087 | 0 | { |
17088 | 0 | relocation += orig_rel.r_addend; |
17089 | 0 | if (tls_type != 0) |
17090 | 0 | { |
17091 | 0 | if (htab->elf.tls_sec == NULL) |
17092 | 0 | relocation = 0; |
17093 | 0 | else |
17094 | 0 | { |
17095 | 0 | if (tls_type & TLS_LD) |
17096 | 0 | relocation = 0; |
17097 | 0 | else |
17098 | 0 | relocation -= htab->elf.tls_sec->vma + DTP_OFFSET; |
17099 | 0 | if (tls_type & TLS_TPREL) |
17100 | 0 | relocation += DTP_OFFSET - TP_OFFSET; |
17101 | 0 | } |
17102 | |
|
17103 | 0 | if (tls_type & (TLS_GD | TLS_LD)) |
17104 | 0 | { |
17105 | 0 | bfd_put_64 (output_bfd, relocation, |
17106 | 0 | got->contents + off + 8); |
17107 | 0 | relocation = 1; |
17108 | 0 | } |
17109 | 0 | } |
17110 | 0 | bfd_put_64 (output_bfd, relocation, |
17111 | 0 | got->contents + off); |
17112 | 0 | } |
17113 | 0 | } |
17114 | |
|
17115 | 0 | if (off >= (bfd_vma) -2) |
17116 | 0 | abort (); |
17117 | | |
17118 | 0 | relocation = got->output_section->vma + got->output_offset + off; |
17119 | 0 | addend = 0; |
17120 | 0 | if (!(r_type == R_PPC64_GOT_PCREL34 |
17121 | 0 | || r_type == R_PPC64_GOT_TLSGD_PCREL34 |
17122 | 0 | || r_type == R_PPC64_GOT_TLSLD_PCREL34 |
17123 | 0 | || r_type == R_PPC64_GOT_TPREL_PCREL34 |
17124 | 0 | || r_type == R_PPC64_GOT_DTPREL_PCREL34)) |
17125 | 0 | addend = -(TOCstart + htab->sec_info[input_section->id].toc_off); |
17126 | 0 | } |
17127 | 0 | break; |
17128 | | |
17129 | 0 | case R_PPC64_PLT16_HA: |
17130 | 0 | case R_PPC64_PLT16_HI: |
17131 | 0 | case R_PPC64_PLT16_LO: |
17132 | 0 | case R_PPC64_PLT16_LO_DS: |
17133 | 0 | case R_PPC64_PLT_PCREL34: |
17134 | 0 | case R_PPC64_PLT_PCREL34_NOTOC: |
17135 | 0 | case R_PPC64_PLT32: |
17136 | 0 | case R_PPC64_PLT64: |
17137 | 0 | case R_PPC64_PLTSEQ: |
17138 | 0 | case R_PPC64_PLTSEQ_NOTOC: |
17139 | 0 | case R_PPC64_PLTCALL: |
17140 | 0 | case R_PPC64_PLTCALL_NOTOC: |
17141 | | /* Relocation is to the entry for this symbol in the |
17142 | | procedure linkage table. */ |
17143 | 0 | unresolved_reloc = true; |
17144 | 0 | { |
17145 | 0 | struct plt_entry **plt_list = NULL; |
17146 | 0 | if (h != NULL) |
17147 | 0 | plt_list = &h->elf.plt.plist; |
17148 | 0 | else if (local_got_ents != NULL) |
17149 | 0 | { |
17150 | 0 | struct plt_entry **local_plt = (struct plt_entry **) |
17151 | 0 | (local_got_ents + symtab_hdr->sh_info); |
17152 | 0 | plt_list = local_plt + r_symndx; |
17153 | 0 | } |
17154 | 0 | if (plt_list) |
17155 | 0 | { |
17156 | 0 | struct plt_entry *ent; |
17157 | |
|
17158 | 0 | for (ent = *plt_list; ent != NULL; ent = ent->next) |
17159 | 0 | if (ent->plt.offset != (bfd_vma) -1 |
17160 | 0 | && ent->addend == orig_rel.r_addend) |
17161 | 0 | { |
17162 | 0 | asection *plt; |
17163 | 0 | bfd_vma got; |
17164 | |
|
17165 | 0 | plt = htab->elf.splt; |
17166 | 0 | if (use_local_plt (info, elf_hash_entry (h))) |
17167 | 0 | { |
17168 | 0 | if (h != NULL |
17169 | 0 | ? h->elf.type == STT_GNU_IFUNC |
17170 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
17171 | 0 | plt = htab->elf.iplt; |
17172 | 0 | else |
17173 | 0 | plt = htab->pltlocal; |
17174 | 0 | } |
17175 | 0 | relocation = (plt->output_section->vma |
17176 | 0 | + plt->output_offset |
17177 | 0 | + ent->plt.offset); |
17178 | 0 | if (r_type == R_PPC64_PLT16_HA |
17179 | 0 | || r_type == R_PPC64_PLT16_HI |
17180 | 0 | || r_type == R_PPC64_PLT16_LO |
17181 | 0 | || r_type == R_PPC64_PLT16_LO_DS) |
17182 | 0 | { |
17183 | 0 | got = (elf_gp (output_bfd) |
17184 | 0 | + htab->sec_info[input_section->id].toc_off); |
17185 | 0 | relocation -= got; |
17186 | 0 | } |
17187 | 0 | addend = 0; |
17188 | 0 | unresolved_reloc = false; |
17189 | 0 | break; |
17190 | 0 | } |
17191 | 0 | } |
17192 | 0 | } |
17193 | 0 | break; |
17194 | | |
17195 | 0 | case R_PPC64_TOC: |
17196 | | /* Relocation value is TOC base. */ |
17197 | 0 | relocation = TOCstart; |
17198 | 0 | if (r_symndx == STN_UNDEF) |
17199 | 0 | relocation += htab->sec_info[input_section->id].toc_off; |
17200 | 0 | else if (unresolved_reloc) |
17201 | 0 | ; |
17202 | 0 | else if (sec != NULL && sec->id < htab->sec_info_arr_size) |
17203 | 0 | relocation += htab->sec_info[sec->id].toc_off; |
17204 | 0 | else |
17205 | 0 | unresolved_reloc = true; |
17206 | 0 | if (unresolved_reloc |
17207 | 0 | || (!is_opd |
17208 | 0 | && h != NULL |
17209 | 0 | && !SYMBOL_REFERENCES_LOCAL (info, &h->elf))) |
17210 | 0 | info->callbacks->einfo |
17211 | | /* xgettext:c-format */ |
17212 | 0 | (_("%H: %s against %pT is not supported\n"), |
17213 | 0 | input_bfd, input_section, rel->r_offset, |
17214 | 0 | ppc64_elf_howto_table[r_type]->name, sym_name); |
17215 | 0 | goto dodyn; |
17216 | | |
17217 | | /* TOC16 relocs. We want the offset relative to the TOC base, |
17218 | | which is the address of the start of the TOC plus 0x8000. |
17219 | | The TOC consists of sections .got, .toc, .tocbss, and .plt, |
17220 | | in this order. */ |
17221 | 0 | case R_PPC64_TOC16: |
17222 | 0 | case R_PPC64_TOC16_LO: |
17223 | 0 | case R_PPC64_TOC16_HI: |
17224 | 0 | case R_PPC64_TOC16_DS: |
17225 | 0 | case R_PPC64_TOC16_LO_DS: |
17226 | 0 | case R_PPC64_TOC16_HA: |
17227 | 0 | addend -= TOCstart + htab->sec_info[input_section->id].toc_off; |
17228 | 0 | if (h != NULL) |
17229 | 0 | goto dodyn; |
17230 | 0 | break; |
17231 | | |
17232 | | /* Relocate against the beginning of the section. */ |
17233 | 0 | case R_PPC64_SECTOFF: |
17234 | 0 | case R_PPC64_SECTOFF_LO: |
17235 | 0 | case R_PPC64_SECTOFF_HI: |
17236 | 0 | case R_PPC64_SECTOFF_DS: |
17237 | 0 | case R_PPC64_SECTOFF_LO_DS: |
17238 | 0 | case R_PPC64_SECTOFF_HA: |
17239 | 0 | if (sec != NULL) |
17240 | 0 | addend -= sec->output_section->vma; |
17241 | 0 | break; |
17242 | | |
17243 | 0 | case R_PPC64_REL16: |
17244 | 0 | case R_PPC64_REL16_LO: |
17245 | 0 | case R_PPC64_REL16_HI: |
17246 | 0 | case R_PPC64_REL16_HA: |
17247 | 0 | case R_PPC64_REL16_HIGH: |
17248 | 0 | case R_PPC64_REL16_HIGHA: |
17249 | 0 | case R_PPC64_REL16_HIGHER: |
17250 | 0 | case R_PPC64_REL16_HIGHERA: |
17251 | 0 | case R_PPC64_REL16_HIGHEST: |
17252 | 0 | case R_PPC64_REL16_HIGHESTA: |
17253 | 0 | case R_PPC64_REL16_HIGHER34: |
17254 | 0 | case R_PPC64_REL16_HIGHERA34: |
17255 | 0 | case R_PPC64_REL16_HIGHEST34: |
17256 | 0 | case R_PPC64_REL16_HIGHESTA34: |
17257 | 0 | case R_PPC64_REL16DX_HA: |
17258 | 0 | case R_PPC64_REL14: |
17259 | 0 | case R_PPC64_REL14_BRNTAKEN: |
17260 | 0 | case R_PPC64_REL14_BRTAKEN: |
17261 | 0 | case R_PPC64_REL24: |
17262 | 0 | case R_PPC64_REL24_NOTOC: |
17263 | 0 | case R_PPC64_REL24_P9NOTOC: |
17264 | 0 | case R_PPC64_PCREL34: |
17265 | 0 | case R_PPC64_PCREL28: |
17266 | 0 | break; |
17267 | | |
17268 | 0 | case R_PPC64_TPREL16: |
17269 | 0 | case R_PPC64_TPREL16_LO: |
17270 | 0 | case R_PPC64_TPREL16_HI: |
17271 | 0 | case R_PPC64_TPREL16_HA: |
17272 | 0 | case R_PPC64_TPREL16_DS: |
17273 | 0 | case R_PPC64_TPREL16_LO_DS: |
17274 | 0 | case R_PPC64_TPREL16_HIGH: |
17275 | 0 | case R_PPC64_TPREL16_HIGHA: |
17276 | 0 | case R_PPC64_TPREL16_HIGHER: |
17277 | 0 | case R_PPC64_TPREL16_HIGHERA: |
17278 | 0 | case R_PPC64_TPREL16_HIGHEST: |
17279 | 0 | case R_PPC64_TPREL16_HIGHESTA: |
17280 | 0 | if (h != NULL |
17281 | 0 | && h->elf.root.type == bfd_link_hash_undefweak |
17282 | 0 | && h->elf.dynindx == -1 |
17283 | 0 | && offset_in_range (input_section, rel->r_offset - d_offset, 4)) |
17284 | 0 | { |
17285 | | /* Make this relocation against an undefined weak symbol |
17286 | | resolve to zero. This is really just a tweak, since |
17287 | | code using weak externs ought to check that they are |
17288 | | defined before using them. */ |
17289 | 0 | bfd_byte *p = contents + rel->r_offset - d_offset; |
17290 | |
|
17291 | 0 | insn = bfd_get_32 (input_bfd, p); |
17292 | 0 | insn = _bfd_elf_ppc_at_tprel_transform (insn, 13); |
17293 | 0 | if (insn != 0) |
17294 | 0 | bfd_put_32 (input_bfd, insn, p); |
17295 | 0 | break; |
17296 | 0 | } |
17297 | | /* Fall through. */ |
17298 | | |
17299 | 0 | case R_PPC64_TPREL34: |
17300 | 0 | if (htab->elf.tls_sec != NULL) |
17301 | 0 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
17302 | | /* The TPREL16 relocs shouldn't really be used in shared |
17303 | | libs or with non-local symbols as that will result in |
17304 | | DT_TEXTREL being set, but support them anyway. */ |
17305 | 0 | goto dodyn; |
17306 | | |
17307 | 0 | case R_PPC64_DTPREL16: |
17308 | 0 | case R_PPC64_DTPREL16_LO: |
17309 | 0 | case R_PPC64_DTPREL16_HI: |
17310 | 0 | case R_PPC64_DTPREL16_HA: |
17311 | 0 | case R_PPC64_DTPREL16_DS: |
17312 | 0 | case R_PPC64_DTPREL16_LO_DS: |
17313 | 0 | case R_PPC64_DTPREL16_HIGH: |
17314 | 0 | case R_PPC64_DTPREL16_HIGHA: |
17315 | 0 | case R_PPC64_DTPREL16_HIGHER: |
17316 | 0 | case R_PPC64_DTPREL16_HIGHERA: |
17317 | 0 | case R_PPC64_DTPREL16_HIGHEST: |
17318 | 0 | case R_PPC64_DTPREL16_HIGHESTA: |
17319 | 0 | case R_PPC64_DTPREL34: |
17320 | 0 | if (htab->elf.tls_sec != NULL) |
17321 | 0 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
17322 | 0 | break; |
17323 | | |
17324 | 0 | case R_PPC64_ADDR64_LOCAL: |
17325 | 0 | addend += PPC64_LOCAL_ENTRY_OFFSET (h != NULL |
17326 | 0 | ? h->elf.other |
17327 | 0 | : sym->st_other); |
17328 | 0 | break; |
17329 | | |
17330 | 0 | case R_PPC64_DTPMOD64: |
17331 | 0 | relocation = 1; |
17332 | 0 | addend = 0; |
17333 | 0 | goto dodyn; |
17334 | | |
17335 | 0 | case R_PPC64_TPREL64: |
17336 | 0 | if (htab->elf.tls_sec != NULL) |
17337 | 0 | addend -= htab->elf.tls_sec->vma + TP_OFFSET; |
17338 | 0 | goto dodyn; |
17339 | | |
17340 | 0 | case R_PPC64_DTPREL64: |
17341 | 0 | if (htab->elf.tls_sec != NULL) |
17342 | 0 | addend -= htab->elf.tls_sec->vma + DTP_OFFSET; |
17343 | | /* Fall through. */ |
17344 | | |
17345 | | /* Relocations that may need to be propagated if this is a |
17346 | | dynamic object. */ |
17347 | 0 | case R_PPC64_REL30: |
17348 | 0 | case R_PPC64_REL32: |
17349 | 0 | case R_PPC64_REL64: |
17350 | 0 | case R_PPC64_ADDR14: |
17351 | 0 | case R_PPC64_ADDR14_BRNTAKEN: |
17352 | 0 | case R_PPC64_ADDR14_BRTAKEN: |
17353 | 0 | case R_PPC64_ADDR16: |
17354 | 0 | case R_PPC64_ADDR16_DS: |
17355 | 0 | case R_PPC64_ADDR16_HA: |
17356 | 0 | case R_PPC64_ADDR16_HI: |
17357 | 0 | case R_PPC64_ADDR16_HIGH: |
17358 | 0 | case R_PPC64_ADDR16_HIGHA: |
17359 | 0 | case R_PPC64_ADDR16_HIGHER: |
17360 | 0 | case R_PPC64_ADDR16_HIGHERA: |
17361 | 0 | case R_PPC64_ADDR16_HIGHEST: |
17362 | 0 | case R_PPC64_ADDR16_HIGHESTA: |
17363 | 0 | case R_PPC64_ADDR16_LO: |
17364 | 0 | case R_PPC64_ADDR16_LO_DS: |
17365 | 0 | case R_PPC64_ADDR16_HIGHER34: |
17366 | 0 | case R_PPC64_ADDR16_HIGHERA34: |
17367 | 0 | case R_PPC64_ADDR16_HIGHEST34: |
17368 | 0 | case R_PPC64_ADDR16_HIGHESTA34: |
17369 | 0 | case R_PPC64_ADDR24: |
17370 | 0 | case R_PPC64_ADDR32: |
17371 | 0 | case R_PPC64_ADDR64: |
17372 | 0 | case R_PPC64_UADDR16: |
17373 | 0 | case R_PPC64_UADDR32: |
17374 | 0 | case R_PPC64_UADDR64: |
17375 | 0 | case R_PPC64_D34: |
17376 | 0 | case R_PPC64_D34_LO: |
17377 | 0 | case R_PPC64_D34_HI30: |
17378 | 0 | case R_PPC64_D34_HA30: |
17379 | 0 | case R_PPC64_D28: |
17380 | 0 | dodyn: |
17381 | 0 | if ((input_section->flags & SEC_ALLOC) == 0) |
17382 | 0 | break; |
17383 | | |
17384 | 0 | if (NO_OPD_RELOCS && is_opd) |
17385 | 0 | break; |
17386 | | |
17387 | 0 | if (bfd_link_pic (info) |
17388 | 0 | ? ((h == NULL |
17389 | 0 | || h->elf.dyn_relocs != NULL) |
17390 | 0 | && ((h != NULL && pc_dynrelocs (h)) |
17391 | 0 | || must_be_dyn_reloc (info, r_type))) |
17392 | 0 | : (h != NULL |
17393 | 0 | ? h->elf.dyn_relocs != NULL |
17394 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) |
17395 | 0 | { |
17396 | 0 | bool skip, relocate; |
17397 | 0 | asection *sreloc; |
17398 | 0 | bfd_vma out_off; |
17399 | 0 | long indx = 0; |
17400 | | |
17401 | | /* When generating a dynamic object, these relocations |
17402 | | are copied into the output file to be resolved at run |
17403 | | time. */ |
17404 | |
|
17405 | 0 | skip = false; |
17406 | 0 | relocate = false; |
17407 | |
|
17408 | 0 | out_off = _bfd_elf_section_offset (output_bfd, info, |
17409 | 0 | input_section, rel->r_offset); |
17410 | 0 | if (out_off == (bfd_vma) -1) |
17411 | 0 | skip = true; |
17412 | 0 | else if (out_off == (bfd_vma) -2) |
17413 | 0 | skip = true, relocate = true; |
17414 | 0 | out_off += (input_section->output_section->vma |
17415 | 0 | + input_section->output_offset); |
17416 | 0 | outrel.r_offset = out_off; |
17417 | 0 | outrel.r_addend = rel->r_addend; |
17418 | | |
17419 | | /* Optimize unaligned reloc use. */ |
17420 | 0 | if ((r_type == R_PPC64_ADDR64 && (out_off & 7) != 0) |
17421 | 0 | || (r_type == R_PPC64_UADDR64 && (out_off & 7) == 0)) |
17422 | 0 | r_type ^= R_PPC64_ADDR64 ^ R_PPC64_UADDR64; |
17423 | 0 | else if ((r_type == R_PPC64_ADDR32 && (out_off & 3) != 0) |
17424 | 0 | || (r_type == R_PPC64_UADDR32 && (out_off & 3) == 0)) |
17425 | 0 | r_type ^= R_PPC64_ADDR32 ^ R_PPC64_UADDR32; |
17426 | 0 | else if ((r_type == R_PPC64_ADDR16 && (out_off & 1) != 0) |
17427 | 0 | || (r_type == R_PPC64_UADDR16 && (out_off & 1) == 0)) |
17428 | 0 | r_type ^= R_PPC64_ADDR16 ^ R_PPC64_UADDR16; |
17429 | |
|
17430 | 0 | if (skip) |
17431 | 0 | memset (&outrel, 0, sizeof outrel); |
17432 | 0 | else if (h != NULL |
17433 | 0 | && !SYMBOL_REFERENCES_LOCAL (info, &h->elf) |
17434 | 0 | && !is_opd |
17435 | 0 | && r_type != R_PPC64_TOC) |
17436 | 0 | { |
17437 | 0 | indx = h->elf.dynindx; |
17438 | 0 | BFD_ASSERT (indx != -1); |
17439 | 0 | outrel.r_info = ELF64_R_INFO (indx, r_type); |
17440 | 0 | } |
17441 | 0 | else |
17442 | 0 | { |
17443 | | /* This symbol is local, or marked to become local, |
17444 | | or this is an opd section reloc which must point |
17445 | | at a local function. */ |
17446 | 0 | outrel.r_addend += relocation; |
17447 | 0 | if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
17448 | 0 | { |
17449 | 0 | if (is_opd && h != NULL) |
17450 | 0 | { |
17451 | | /* Lie about opd entries. This case occurs |
17452 | | when building shared libraries and we |
17453 | | reference a function in another shared |
17454 | | lib. The same thing happens for a weak |
17455 | | definition in an application that's |
17456 | | overridden by a strong definition in a |
17457 | | shared lib. (I believe this is a generic |
17458 | | bug in binutils handling of weak syms.) |
17459 | | In these cases we won't use the opd |
17460 | | entry in this lib. */ |
17461 | 0 | unresolved_reloc = false; |
17462 | 0 | } |
17463 | 0 | if (!is_opd |
17464 | 0 | && r_type == R_PPC64_ADDR64 |
17465 | 0 | && (h != NULL |
17466 | 0 | ? h->elf.type == STT_GNU_IFUNC |
17467 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)) |
17468 | 0 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_IRELATIVE); |
17469 | 0 | else |
17470 | 0 | { |
17471 | 0 | outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
17472 | | |
17473 | | /* We need to relocate .opd contents for ld.so. |
17474 | | Prelink also wants simple and consistent rules |
17475 | | for relocs. This make all RELATIVE relocs have |
17476 | | *r_offset equal to r_addend. */ |
17477 | 0 | relocate = true; |
17478 | 0 | } |
17479 | 0 | } |
17480 | 0 | else |
17481 | 0 | { |
17482 | 0 | if (h != NULL |
17483 | 0 | ? h->elf.type == STT_GNU_IFUNC |
17484 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
17485 | 0 | { |
17486 | 0 | info->callbacks->einfo |
17487 | | /* xgettext:c-format */ |
17488 | 0 | (_("%H: %s for indirect " |
17489 | 0 | "function `%pT' unsupported\n"), |
17490 | 0 | input_bfd, input_section, rel->r_offset, |
17491 | 0 | ppc64_elf_howto_table[r_type]->name, |
17492 | 0 | sym_name); |
17493 | 0 | ret = false; |
17494 | 0 | } |
17495 | 0 | else if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) |
17496 | 0 | ; |
17497 | 0 | else if (sec == NULL || sec->owner == NULL) |
17498 | 0 | { |
17499 | 0 | bfd_set_error (bfd_error_bad_value); |
17500 | 0 | return false; |
17501 | 0 | } |
17502 | 0 | else |
17503 | 0 | { |
17504 | 0 | asection *osec = sec->output_section; |
17505 | |
|
17506 | 0 | if ((osec->flags & SEC_THREAD_LOCAL) != 0) |
17507 | 0 | { |
17508 | | /* TLS symbol values are relative to the |
17509 | | TLS segment. Dynamic relocations for |
17510 | | local TLS symbols therefore can't be |
17511 | | reduced to a relocation against their |
17512 | | section symbol because it holds the |
17513 | | address of the section, not a value |
17514 | | relative to the TLS segment. We could |
17515 | | change the .tdata dynamic section symbol |
17516 | | to be zero value but STN_UNDEF works |
17517 | | and is used elsewhere, eg. for TPREL64 |
17518 | | GOT relocs against local TLS symbols. */ |
17519 | 0 | osec = htab->elf.tls_sec; |
17520 | 0 | indx = 0; |
17521 | 0 | } |
17522 | 0 | else |
17523 | 0 | { |
17524 | 0 | indx = elf_section_data (osec)->dynindx; |
17525 | 0 | if (indx == 0) |
17526 | 0 | { |
17527 | 0 | if ((osec->flags & SEC_READONLY) == 0 |
17528 | 0 | && htab->elf.data_index_section != NULL) |
17529 | 0 | osec = htab->elf.data_index_section; |
17530 | 0 | else |
17531 | 0 | osec = htab->elf.text_index_section; |
17532 | 0 | indx = elf_section_data (osec)->dynindx; |
17533 | 0 | } |
17534 | 0 | BFD_ASSERT (indx != 0); |
17535 | 0 | } |
17536 | | |
17537 | | /* We are turning this relocation into one |
17538 | | against a section symbol, so subtract out |
17539 | | the output section's address but not the |
17540 | | offset of the input section in the output |
17541 | | section. */ |
17542 | 0 | outrel.r_addend -= osec->vma; |
17543 | 0 | } |
17544 | | |
17545 | 0 | outrel.r_info = ELF64_R_INFO (indx, r_type); |
17546 | 0 | } |
17547 | 0 | } |
17548 | | |
17549 | 0 | if (!(info->enable_dt_relr |
17550 | 0 | && ELF64_R_TYPE (outrel.r_info) == R_PPC64_RELATIVE |
17551 | 0 | && maybe_relr (ELF64_R_TYPE (orig_rel.r_info), |
17552 | 0 | rel, input_section))) |
17553 | 0 | { |
17554 | 0 | sreloc = elf_section_data (input_section)->sreloc; |
17555 | 0 | if (h != NULL |
17556 | 0 | ? h->elf.type == STT_GNU_IFUNC |
17557 | 0 | : ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
17558 | 0 | { |
17559 | 0 | sreloc = htab->elf.irelplt; |
17560 | 0 | if (indx == 0 || is_static_defined (&h->elf)) |
17561 | 0 | htab->elf.ifunc_resolvers = true; |
17562 | 0 | } |
17563 | 0 | if (sreloc == NULL) |
17564 | 0 | abort (); |
17565 | | |
17566 | 0 | BFD_ASSERT (count_and_swap_reloc_out (output_bfd, &outrel, |
17567 | 0 | sreloc)); |
17568 | 0 | } |
17569 | | |
17570 | 0 | if (!warned_dynamic |
17571 | 0 | && !ppc64_glibc_dynamic_reloc (ELF64_R_TYPE (outrel.r_info))) |
17572 | 0 | { |
17573 | 0 | info->callbacks->einfo |
17574 | | /* xgettext:c-format */ |
17575 | 0 | (_("%X%P: %pB: %s against %pT " |
17576 | 0 | "is not supported by glibc as a dynamic relocation\n"), |
17577 | 0 | input_bfd, |
17578 | 0 | ppc64_elf_howto_table[ELF64_R_TYPE (outrel.r_info)]->name, |
17579 | 0 | sym_name); |
17580 | 0 | warned_dynamic = true; |
17581 | 0 | } |
17582 | | |
17583 | | /* If this reloc is against an external symbol, it will |
17584 | | be computed at runtime, so there's no need to do |
17585 | | anything now. However, for the sake of prelink ensure |
17586 | | that the section contents are a known value. */ |
17587 | 0 | if (!relocate) |
17588 | 0 | { |
17589 | 0 | unresolved_reloc = false; |
17590 | | /* The value chosen here is quite arbitrary as ld.so |
17591 | | ignores section contents except for the special |
17592 | | case of .opd where the contents might be accessed |
17593 | | before relocation. Choose zero, as that won't |
17594 | | cause reloc overflow. */ |
17595 | 0 | relocation = 0; |
17596 | 0 | addend = 0; |
17597 | | /* Use *r_offset == r_addend for R_PPC64_ADDR64 relocs |
17598 | | to improve backward compatibility with older |
17599 | | versions of ld. */ |
17600 | 0 | if (r_type == R_PPC64_ADDR64) |
17601 | 0 | addend = outrel.r_addend; |
17602 | | /* Adjust pc_relative relocs to have zero in *r_offset. */ |
17603 | 0 | else if (ppc64_elf_howto_table[r_type]->pc_relative) |
17604 | 0 | addend = outrel.r_offset; |
17605 | 0 | } |
17606 | 0 | } |
17607 | 0 | break; |
17608 | | |
17609 | 0 | case R_PPC64_COPY: |
17610 | 0 | case R_PPC64_GLOB_DAT: |
17611 | 0 | case R_PPC64_JMP_SLOT: |
17612 | 0 | case R_PPC64_JMP_IREL: |
17613 | 0 | case R_PPC64_RELATIVE: |
17614 | | /* We shouldn't ever see these dynamic relocs in relocatable |
17615 | | files. */ |
17616 | | /* Fall through. */ |
17617 | |
|
17618 | 0 | case R_PPC64_PLTGOT16: |
17619 | 0 | case R_PPC64_PLTGOT16_DS: |
17620 | 0 | case R_PPC64_PLTGOT16_HA: |
17621 | 0 | case R_PPC64_PLTGOT16_HI: |
17622 | 0 | case R_PPC64_PLTGOT16_LO: |
17623 | 0 | case R_PPC64_PLTGOT16_LO_DS: |
17624 | 0 | case R_PPC64_PLTREL32: |
17625 | 0 | case R_PPC64_PLTREL64: |
17626 | | /* These ones haven't been implemented yet. */ |
17627 | |
|
17628 | 0 | info->callbacks->einfo |
17629 | | /* xgettext:c-format */ |
17630 | 0 | (_("%P: %pB: %s is not supported for `%pT'\n"), |
17631 | 0 | input_bfd, |
17632 | 0 | ppc64_elf_howto_table[r_type]->name, sym_name); |
17633 | |
|
17634 | 0 | bfd_set_error (bfd_error_invalid_operation); |
17635 | 0 | ret = false; |
17636 | 0 | goto copy_reloc; |
17637 | 0 | } |
17638 | | |
17639 | | /* Multi-instruction sequences that access the TOC can be |
17640 | | optimized, eg. addis ra,r2,0; addi rb,ra,x; |
17641 | | to nop; addi rb,r2,x; */ |
17642 | 0 | switch (r_type) |
17643 | 0 | { |
17644 | 0 | default: |
17645 | 0 | break; |
17646 | | |
17647 | 0 | case R_PPC64_GOT_TLSLD16_HI: |
17648 | 0 | case R_PPC64_GOT_TLSGD16_HI: |
17649 | 0 | case R_PPC64_GOT_TPREL16_HI: |
17650 | 0 | case R_PPC64_GOT_DTPREL16_HI: |
17651 | 0 | case R_PPC64_GOT16_HI: |
17652 | 0 | case R_PPC64_TOC16_HI: |
17653 | | /* These relocs would only be useful if building up an |
17654 | | offset to later add to r2, perhaps in an indexed |
17655 | | addressing mode instruction. Don't try to optimize. |
17656 | | Unfortunately, the possibility of someone building up an |
17657 | | offset like this or even with the HA relocs, means that |
17658 | | we need to check the high insn when optimizing the low |
17659 | | insn. */ |
17660 | 0 | break; |
17661 | | |
17662 | 0 | case R_PPC64_PLTCALL_NOTOC: |
17663 | 0 | if (!unresolved_reloc) |
17664 | 0 | htab->notoc_plt = 1; |
17665 | | /* Fall through. */ |
17666 | 0 | case R_PPC64_PLTCALL: |
17667 | 0 | if (unresolved_reloc |
17668 | 0 | && offset_in_range (input_section, rel->r_offset, |
17669 | 0 | r_type == R_PPC64_PLTCALL ? 8 : 4)) |
17670 | 0 | { |
17671 | | /* No plt entry. Make this into a direct call. */ |
17672 | 0 | bfd_byte *p = contents + rel->r_offset; |
17673 | 0 | insn = bfd_get_32 (input_bfd, p); |
17674 | 0 | insn &= 1; |
17675 | 0 | bfd_put_32 (input_bfd, B_DOT | insn, p); |
17676 | 0 | if (r_type == R_PPC64_PLTCALL) |
17677 | 0 | bfd_put_32 (input_bfd, NOP, p + 4); |
17678 | 0 | unresolved_reloc = save_unresolved_reloc; |
17679 | 0 | r_type = R_PPC64_REL24; |
17680 | 0 | } |
17681 | 0 | break; |
17682 | | |
17683 | 0 | case R_PPC64_PLTSEQ_NOTOC: |
17684 | 0 | case R_PPC64_PLTSEQ: |
17685 | 0 | if (unresolved_reloc) |
17686 | 0 | { |
17687 | 0 | unresolved_reloc = false; |
17688 | 0 | goto nop_it; |
17689 | 0 | } |
17690 | 0 | break; |
17691 | | |
17692 | 0 | case R_PPC64_PLT_PCREL34_NOTOC: |
17693 | 0 | if (!unresolved_reloc) |
17694 | 0 | htab->notoc_plt = 1; |
17695 | | /* Fall through. */ |
17696 | 0 | case R_PPC64_PLT_PCREL34: |
17697 | 0 | if (unresolved_reloc |
17698 | 0 | && offset_in_range (input_section, rel->r_offset, 8)) |
17699 | 0 | { |
17700 | 0 | bfd_byte *p = contents + rel->r_offset; |
17701 | 0 | bfd_put_32 (input_bfd, PNOP >> 32, p); |
17702 | 0 | bfd_put_32 (input_bfd, PNOP, p + 4); |
17703 | 0 | unresolved_reloc = false; |
17704 | 0 | goto copy_reloc; |
17705 | 0 | } |
17706 | 0 | break; |
17707 | | |
17708 | 0 | case R_PPC64_PLT16_HA: |
17709 | 0 | if (unresolved_reloc) |
17710 | 0 | { |
17711 | 0 | unresolved_reloc = false; |
17712 | 0 | goto nop_it; |
17713 | 0 | } |
17714 | | /* Fall through. */ |
17715 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
17716 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
17717 | 0 | case R_PPC64_GOT_TPREL16_HA: |
17718 | 0 | case R_PPC64_GOT_DTPREL16_HA: |
17719 | 0 | case R_PPC64_GOT16_HA: |
17720 | 0 | case R_PPC64_TOC16_HA: |
17721 | 0 | if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 |
17722 | 0 | && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn |
17723 | 0 | && !(bfd_link_pic (info) |
17724 | 0 | && (h != NULL |
17725 | 0 | ? bfd_is_abs_symbol (&h->elf.root) |
17726 | 0 | : sec == bfd_abs_section_ptr))) |
17727 | 0 | { |
17728 | 0 | bfd_byte *p; |
17729 | 0 | nop_it: |
17730 | 0 | if (offset_in_range (input_section, rel->r_offset & ~3, 4)) |
17731 | 0 | { |
17732 | 0 | p = contents + (rel->r_offset & ~3); |
17733 | 0 | bfd_put_32 (input_bfd, NOP, p); |
17734 | 0 | goto copy_reloc; |
17735 | 0 | } |
17736 | 0 | } |
17737 | 0 | break; |
17738 | | |
17739 | 0 | case R_PPC64_PLT16_LO: |
17740 | 0 | case R_PPC64_PLT16_LO_DS: |
17741 | 0 | if (unresolved_reloc) |
17742 | 0 | { |
17743 | 0 | unresolved_reloc = false; |
17744 | 0 | goto nop_it; |
17745 | 0 | } |
17746 | | /* Fall through. */ |
17747 | 0 | case R_PPC64_GOT_TLSLD16_LO: |
17748 | 0 | case R_PPC64_GOT_TLSGD16_LO: |
17749 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
17750 | 0 | case R_PPC64_GOT_DTPREL16_LO_DS: |
17751 | 0 | case R_PPC64_GOT16_LO: |
17752 | 0 | case R_PPC64_GOT16_LO_DS: |
17753 | 0 | case R_PPC64_TOC16_LO: |
17754 | 0 | case R_PPC64_TOC16_LO_DS: |
17755 | 0 | if (htab->do_toc_opt && relocation + addend + 0x8000 < 0x10000 |
17756 | 0 | && !ppc64_elf_tdata (input_bfd)->unexpected_toc_insn |
17757 | 0 | && !(bfd_link_pic (info) |
17758 | 0 | && (h != NULL |
17759 | 0 | ? bfd_is_abs_symbol (&h->elf.root) |
17760 | 0 | : sec == bfd_abs_section_ptr)) |
17761 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
17762 | 0 | { |
17763 | 0 | bfd_byte *p = contents + (rel->r_offset & ~3); |
17764 | 0 | insn = bfd_get_32 (input_bfd, p); |
17765 | 0 | if ((insn & (0x3fu << 26)) == 12u << 26 /* addic */) |
17766 | 0 | { |
17767 | | /* Transform addic to addi when we change reg. */ |
17768 | 0 | insn &= ~((0x3fu << 26) | (0x1f << 16)); |
17769 | 0 | insn |= (14u << 26) | (2 << 16); |
17770 | 0 | } |
17771 | 0 | else |
17772 | 0 | { |
17773 | 0 | insn &= ~(0x1f << 16); |
17774 | 0 | insn |= 2 << 16; |
17775 | 0 | } |
17776 | 0 | bfd_put_32 (input_bfd, insn, p); |
17777 | 0 | } |
17778 | 0 | break; |
17779 | | |
17780 | 0 | case R_PPC64_TPREL16_HA: |
17781 | 0 | if (htab->do_tls_opt |
17782 | 0 | && relocation + addend + 0x8000 < 0x10000 |
17783 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
17784 | 0 | { |
17785 | 0 | bfd_byte *p = contents + (rel->r_offset & ~3); |
17786 | 0 | bfd_put_32 (input_bfd, NOP, p); |
17787 | 0 | goto copy_reloc; |
17788 | 0 | } |
17789 | 0 | break; |
17790 | | |
17791 | 0 | case R_PPC64_TPREL16_LO: |
17792 | 0 | case R_PPC64_TPREL16_LO_DS: |
17793 | 0 | if (htab->do_tls_opt |
17794 | 0 | && relocation + addend + 0x8000 < 0x10000 |
17795 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
17796 | 0 | { |
17797 | 0 | bfd_byte *p = contents + (rel->r_offset & ~3); |
17798 | 0 | insn = bfd_get_32 (input_bfd, p); |
17799 | 0 | insn &= ~(0x1f << 16); |
17800 | 0 | insn |= 13 << 16; |
17801 | 0 | bfd_put_32 (input_bfd, insn, p); |
17802 | 0 | } |
17803 | 0 | break; |
17804 | 0 | } |
17805 | | |
17806 | | /* Do any further special processing. */ |
17807 | 0 | switch (r_type) |
17808 | 0 | { |
17809 | 0 | default: |
17810 | 0 | break; |
17811 | | |
17812 | 0 | case R_PPC64_REL16_HA: |
17813 | 0 | case R_PPC64_REL16_HIGHA: |
17814 | 0 | case R_PPC64_REL16_HIGHERA: |
17815 | 0 | case R_PPC64_REL16_HIGHESTA: |
17816 | 0 | case R_PPC64_REL16DX_HA: |
17817 | 0 | case R_PPC64_ADDR16_HA: |
17818 | 0 | case R_PPC64_ADDR16_HIGHA: |
17819 | 0 | case R_PPC64_ADDR16_HIGHERA: |
17820 | 0 | case R_PPC64_ADDR16_HIGHESTA: |
17821 | 0 | case R_PPC64_TOC16_HA: |
17822 | 0 | case R_PPC64_SECTOFF_HA: |
17823 | 0 | case R_PPC64_TPREL16_HA: |
17824 | 0 | case R_PPC64_TPREL16_HIGHA: |
17825 | 0 | case R_PPC64_TPREL16_HIGHERA: |
17826 | 0 | case R_PPC64_TPREL16_HIGHESTA: |
17827 | 0 | case R_PPC64_DTPREL16_HA: |
17828 | 0 | case R_PPC64_DTPREL16_HIGHA: |
17829 | 0 | case R_PPC64_DTPREL16_HIGHERA: |
17830 | 0 | case R_PPC64_DTPREL16_HIGHESTA: |
17831 | | /* It's just possible that this symbol is a weak symbol |
17832 | | that's not actually defined anywhere. In that case, |
17833 | | 'sec' would be NULL, and we should leave the symbol |
17834 | | alone (it will be set to zero elsewhere in the link). */ |
17835 | 0 | if (sec == NULL) |
17836 | 0 | break; |
17837 | | /* Fall through. */ |
17838 | | |
17839 | 0 | case R_PPC64_GOT16_HA: |
17840 | 0 | case R_PPC64_PLTGOT16_HA: |
17841 | 0 | case R_PPC64_PLT16_HA: |
17842 | 0 | case R_PPC64_GOT_TLSGD16_HA: |
17843 | 0 | case R_PPC64_GOT_TLSLD16_HA: |
17844 | 0 | case R_PPC64_GOT_TPREL16_HA: |
17845 | 0 | case R_PPC64_GOT_DTPREL16_HA: |
17846 | | /* Add 0x10000 if sign bit in 0:15 is set. |
17847 | | Bits 0:15 are not used. */ |
17848 | 0 | addend += 0x8000; |
17849 | 0 | break; |
17850 | | |
17851 | 0 | case R_PPC64_D34_HA30: |
17852 | 0 | case R_PPC64_ADDR16_HIGHERA34: |
17853 | 0 | case R_PPC64_ADDR16_HIGHESTA34: |
17854 | 0 | case R_PPC64_REL16_HIGHERA34: |
17855 | 0 | case R_PPC64_REL16_HIGHESTA34: |
17856 | 0 | if (sec != NULL) |
17857 | 0 | addend += 1ULL << 33; |
17858 | 0 | break; |
17859 | | |
17860 | 0 | case R_PPC64_ADDR16_DS: |
17861 | 0 | case R_PPC64_ADDR16_LO_DS: |
17862 | 0 | case R_PPC64_GOT16_DS: |
17863 | 0 | case R_PPC64_GOT16_LO_DS: |
17864 | 0 | case R_PPC64_PLT16_LO_DS: |
17865 | 0 | case R_PPC64_SECTOFF_DS: |
17866 | 0 | case R_PPC64_SECTOFF_LO_DS: |
17867 | 0 | case R_PPC64_TOC16_DS: |
17868 | 0 | case R_PPC64_TOC16_LO_DS: |
17869 | 0 | case R_PPC64_PLTGOT16_DS: |
17870 | 0 | case R_PPC64_PLTGOT16_LO_DS: |
17871 | 0 | case R_PPC64_GOT_TPREL16_DS: |
17872 | 0 | case R_PPC64_GOT_TPREL16_LO_DS: |
17873 | 0 | case R_PPC64_GOT_DTPREL16_DS: |
17874 | 0 | case R_PPC64_GOT_DTPREL16_LO_DS: |
17875 | 0 | case R_PPC64_TPREL16_DS: |
17876 | 0 | case R_PPC64_TPREL16_LO_DS: |
17877 | 0 | case R_PPC64_DTPREL16_DS: |
17878 | 0 | case R_PPC64_DTPREL16_LO_DS: |
17879 | 0 | if (!offset_in_range (input_section, rel->r_offset & ~3, 4)) |
17880 | 0 | break; |
17881 | 0 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
17882 | 0 | mask = 3; |
17883 | | /* If this reloc is against an lq, lxv, or stxv insn, then |
17884 | | the value must be a multiple of 16. This is somewhat of |
17885 | | a hack, but the "correct" way to do this by defining _DQ |
17886 | | forms of all the _DS relocs bloats all reloc switches in |
17887 | | this file. It doesn't make much sense to use these |
17888 | | relocs in data, so testing the insn should be safe. */ |
17889 | 0 | if ((insn & (0x3fu << 26)) == (56u << 26) |
17890 | 0 | || ((insn & (0x3fu << 26)) == (61u << 26) && (insn & 3) == 1)) |
17891 | 0 | mask = 15; |
17892 | 0 | relocation += addend; |
17893 | 0 | addend = insn & (mask ^ 3); |
17894 | 0 | if ((relocation & mask) != 0) |
17895 | 0 | { |
17896 | 0 | relocation ^= relocation & mask; |
17897 | 0 | info->callbacks->einfo |
17898 | | /* xgettext:c-format */ |
17899 | 0 | (_("%H: error: %s not a multiple of %u\n"), |
17900 | 0 | input_bfd, input_section, rel->r_offset, |
17901 | 0 | ppc64_elf_howto_table[r_type]->name, |
17902 | 0 | mask + 1); |
17903 | 0 | bfd_set_error (bfd_error_bad_value); |
17904 | 0 | ret = false; |
17905 | 0 | goto copy_reloc; |
17906 | 0 | } |
17907 | 0 | break; |
17908 | 0 | } |
17909 | | |
17910 | | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
17911 | | because such sections are not SEC_ALLOC and thus ld.so will |
17912 | | not process them. */ |
17913 | 0 | howto = ppc64_elf_howto_table[(int) r_type]; |
17914 | 0 | if (unresolved_reloc |
17915 | 0 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
17916 | 0 | && h->elf.def_dynamic) |
17917 | 0 | && _bfd_elf_section_offset (output_bfd, info, input_section, |
17918 | 0 | rel->r_offset) != (bfd_vma) -1) |
17919 | 0 | { |
17920 | 0 | info->callbacks->einfo |
17921 | | /* xgettext:c-format */ |
17922 | 0 | (_("%H: unresolvable %s against `%pT'\n"), |
17923 | 0 | input_bfd, input_section, rel->r_offset, |
17924 | 0 | howto->name, |
17925 | 0 | h->elf.root.root.string); |
17926 | 0 | ret = false; |
17927 | 0 | } |
17928 | | |
17929 | | /* 16-bit fields in insns mostly have signed values, but a |
17930 | | few insns have 16-bit unsigned values. Really, we should |
17931 | | have different reloc types. */ |
17932 | 0 | if (howto->complain_on_overflow != complain_overflow_dont |
17933 | 0 | && howto->dst_mask == 0xffff |
17934 | 0 | && (input_section->flags & SEC_CODE) != 0 |
17935 | 0 | && offset_in_range (input_section, rel->r_offset & ~3, 4)) |
17936 | 0 | { |
17937 | 0 | enum complain_overflow complain = complain_overflow_signed; |
17938 | |
|
17939 | 0 | insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
17940 | 0 | if ((insn & (0x3fu << 26)) == 10u << 26 /* cmpli */) |
17941 | 0 | complain = complain_overflow_bitfield; |
17942 | 0 | else if (howto->rightshift == 0 |
17943 | 0 | ? ((insn & (0x3fu << 26)) == 28u << 26 /* andi */ |
17944 | 0 | || (insn & (0x3fu << 26)) == 24u << 26 /* ori */ |
17945 | 0 | || (insn & (0x3fu << 26)) == 26u << 26 /* xori */) |
17946 | 0 | : ((insn & (0x3fu << 26)) == 29u << 26 /* andis */ |
17947 | 0 | || (insn & (0x3fu << 26)) == 25u << 26 /* oris */ |
17948 | 0 | || (insn & (0x3fu << 26)) == 27u << 26 /* xoris */)) |
17949 | 0 | complain = complain_overflow_unsigned; |
17950 | 0 | if (howto->complain_on_overflow != complain) |
17951 | 0 | { |
17952 | 0 | alt_howto = *howto; |
17953 | 0 | alt_howto.complain_on_overflow = complain; |
17954 | 0 | howto = &alt_howto; |
17955 | 0 | } |
17956 | 0 | } |
17957 | |
|
17958 | 0 | switch (r_type) |
17959 | 0 | { |
17960 | | /* Split field relocs aren't handled by _bfd_final_link_relocate. */ |
17961 | 0 | case R_PPC64_D34: |
17962 | 0 | case R_PPC64_D34_LO: |
17963 | 0 | case R_PPC64_D34_HI30: |
17964 | 0 | case R_PPC64_D34_HA30: |
17965 | 0 | case R_PPC64_PCREL34: |
17966 | 0 | case R_PPC64_GOT_PCREL34: |
17967 | 0 | case R_PPC64_TPREL34: |
17968 | 0 | case R_PPC64_DTPREL34: |
17969 | 0 | case R_PPC64_GOT_TLSGD_PCREL34: |
17970 | 0 | case R_PPC64_GOT_TLSLD_PCREL34: |
17971 | 0 | case R_PPC64_GOT_TPREL_PCREL34: |
17972 | 0 | case R_PPC64_GOT_DTPREL_PCREL34: |
17973 | 0 | case R_PPC64_PLT_PCREL34: |
17974 | 0 | case R_PPC64_PLT_PCREL34_NOTOC: |
17975 | 0 | case R_PPC64_D28: |
17976 | 0 | case R_PPC64_PCREL28: |
17977 | 0 | if (!offset_in_range (input_section, rel->r_offset, 8)) |
17978 | 0 | r = bfd_reloc_outofrange; |
17979 | 0 | else |
17980 | 0 | { |
17981 | 0 | relocation += addend; |
17982 | 0 | if (howto->pc_relative) |
17983 | 0 | relocation -= (rel->r_offset |
17984 | 0 | + input_section->output_offset |
17985 | 0 | + input_section->output_section->vma); |
17986 | 0 | relocation >>= howto->rightshift; |
17987 | |
|
17988 | 0 | pinsn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
17989 | 0 | pinsn <<= 32; |
17990 | 0 | pinsn |= bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
17991 | |
|
17992 | 0 | pinsn &= ~howto->dst_mask; |
17993 | 0 | pinsn |= (((relocation << 16) | (relocation & 0xffff)) |
17994 | 0 | & howto->dst_mask); |
17995 | 0 | bfd_put_32 (input_bfd, pinsn >> 32, contents + rel->r_offset); |
17996 | 0 | bfd_put_32 (input_bfd, pinsn, contents + rel->r_offset + 4); |
17997 | 0 | r = bfd_reloc_ok; |
17998 | 0 | if (howto->complain_on_overflow == complain_overflow_signed |
17999 | 0 | && (relocation + (1ULL << (howto->bitsize - 1)) |
18000 | 0 | >= 1ULL << howto->bitsize)) |
18001 | 0 | r = bfd_reloc_overflow; |
18002 | 0 | } |
18003 | 0 | break; |
18004 | | |
18005 | 0 | case R_PPC64_REL16DX_HA: |
18006 | 0 | if (!offset_in_range (input_section, rel->r_offset, 4)) |
18007 | 0 | r = bfd_reloc_outofrange; |
18008 | 0 | else |
18009 | 0 | { |
18010 | 0 | relocation += addend; |
18011 | 0 | relocation -= (rel->r_offset |
18012 | 0 | + input_section->output_offset |
18013 | 0 | + input_section->output_section->vma); |
18014 | 0 | relocation = (bfd_signed_vma) relocation >> 16; |
18015 | 0 | insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
18016 | 0 | insn &= ~0x1fffc1; |
18017 | 0 | insn |= (relocation & 0xffc1) | ((relocation & 0x3e) << 15); |
18018 | 0 | bfd_put_32 (input_bfd, insn, contents + rel->r_offset); |
18019 | 0 | r = bfd_reloc_ok; |
18020 | 0 | if (relocation + 0x8000 > 0xffff) |
18021 | 0 | r = bfd_reloc_overflow; |
18022 | 0 | } |
18023 | 0 | break; |
18024 | | |
18025 | 0 | default: |
18026 | 0 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
18027 | 0 | contents, rel->r_offset, |
18028 | 0 | relocation, addend); |
18029 | 0 | } |
18030 | | |
18031 | 0 | if (r != bfd_reloc_ok) |
18032 | 0 | { |
18033 | 0 | char *more_info = NULL; |
18034 | 0 | const char *reloc_name = howto->name; |
18035 | |
|
18036 | 0 | if (reloc_dest != DEST_NORMAL) |
18037 | 0 | { |
18038 | 0 | more_info = bfd_malloc (strlen (reloc_name) + 8); |
18039 | 0 | if (more_info != NULL) |
18040 | 0 | { |
18041 | 0 | strcpy (more_info, reloc_name); |
18042 | 0 | strcat (more_info, (reloc_dest == DEST_OPD |
18043 | 0 | ? " (OPD)" : " (stub)")); |
18044 | 0 | reloc_name = more_info; |
18045 | 0 | } |
18046 | 0 | } |
18047 | |
|
18048 | 0 | if (r == bfd_reloc_overflow) |
18049 | 0 | { |
18050 | | /* On code like "if (foo) foo();" don't report overflow |
18051 | | on a branch to zero when foo is undefined. */ |
18052 | 0 | if (!warned |
18053 | 0 | && (reloc_dest == DEST_STUB |
18054 | 0 | || !(h != NULL |
18055 | 0 | && (h->elf.root.type == bfd_link_hash_undefweak |
18056 | 0 | || h->elf.root.type == bfd_link_hash_undefined) |
18057 | 0 | && is_branch_reloc (r_type)))) |
18058 | 0 | info->callbacks->reloc_overflow |
18059 | 0 | (info, (struct bfd_link_hash_entry *) h, sym_name, |
18060 | 0 | reloc_name, orig_rel.r_addend, input_bfd, input_section, |
18061 | 0 | rel->r_offset); |
18062 | 0 | } |
18063 | 0 | else |
18064 | 0 | { |
18065 | 0 | info->callbacks->einfo |
18066 | | /* xgettext:c-format */ |
18067 | 0 | (_("%H: %s against `%pT': error %d\n"), |
18068 | 0 | input_bfd, input_section, rel->r_offset, |
18069 | 0 | reloc_name, sym_name, (int) r); |
18070 | 0 | ret = false; |
18071 | 0 | } |
18072 | 0 | free (more_info); |
18073 | 0 | } |
18074 | 0 | copy_reloc: |
18075 | 0 | if (wrel != rel) |
18076 | 0 | *wrel = *rel; |
18077 | 0 | } |
18078 | | |
18079 | 0 | if (wrel != rel) |
18080 | 0 | { |
18081 | 0 | Elf_Internal_Shdr *rel_hdr; |
18082 | 0 | size_t deleted = rel - wrel; |
18083 | |
|
18084 | 0 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); |
18085 | 0 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; |
18086 | 0 | if (rel_hdr->sh_size == 0) |
18087 | 0 | { |
18088 | | /* It is too late to remove an empty reloc section. Leave |
18089 | | one NONE reloc. |
18090 | | ??? What is wrong with an empty section??? */ |
18091 | 0 | rel_hdr->sh_size = rel_hdr->sh_entsize; |
18092 | 0 | deleted -= 1; |
18093 | 0 | } |
18094 | 0 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); |
18095 | 0 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; |
18096 | 0 | input_section->reloc_count -= deleted; |
18097 | 0 | } |
18098 | | |
18099 | | /* If we're emitting relocations, then shortly after this function |
18100 | | returns, reloc offsets and addends for this section will be |
18101 | | adjusted. Worse, reloc symbol indices will be for the output |
18102 | | file rather than the input. Save a copy of the relocs for |
18103 | | opd_entry_value. */ |
18104 | 0 | if (is_opd |
18105 | 0 | && (info->emitrelocations || bfd_link_relocatable (info)) |
18106 | 0 | && input_section->reloc_count != 0) |
18107 | 0 | { |
18108 | 0 | bfd_size_type amt; |
18109 | 0 | amt = input_section->reloc_count * sizeof (Elf_Internal_Rela); |
18110 | 0 | rel = bfd_alloc (input_bfd, amt); |
18111 | 0 | ppc64_elf_section_data (input_section)->u.opd.u.relocs = rel; |
18112 | 0 | if (rel == NULL) |
18113 | 0 | return false; |
18114 | 0 | memcpy (rel, relocs, amt); |
18115 | 0 | } |
18116 | 0 | return ret; |
18117 | 0 | } |
18118 | | |
18119 | | /* Adjust the value of any local symbols in opd sections. */ |
18120 | | |
18121 | | static int |
18122 | | ppc64_elf_output_symbol_hook (struct bfd_link_info *info, |
18123 | | const char *name ATTRIBUTE_UNUSED, |
18124 | | Elf_Internal_Sym *elfsym, |
18125 | | asection *input_sec, |
18126 | | struct elf_link_hash_entry *h) |
18127 | 0 | { |
18128 | 0 | struct _opd_sec_data *opd; |
18129 | 0 | long adjust; |
18130 | 0 | bfd_vma value; |
18131 | |
|
18132 | 0 | if (h != NULL) |
18133 | 0 | return 1; |
18134 | | |
18135 | 0 | opd = get_opd_info (input_sec); |
18136 | 0 | if (opd == NULL || opd->adjust == NULL) |
18137 | 0 | return 1; |
18138 | | |
18139 | 0 | value = elfsym->st_value - input_sec->output_offset; |
18140 | 0 | if (!bfd_link_relocatable (info)) |
18141 | 0 | value -= input_sec->output_section->vma; |
18142 | |
|
18143 | 0 | adjust = opd->adjust[OPD_NDX (value)]; |
18144 | 0 | if (adjust == -1) |
18145 | 0 | return 2; |
18146 | | |
18147 | 0 | elfsym->st_value += adjust; |
18148 | 0 | return 1; |
18149 | 0 | } |
18150 | | |
18151 | | /* Finish up dynamic symbol handling. We set the contents of various |
18152 | | dynamic sections here. */ |
18153 | | |
18154 | | static bool |
18155 | | ppc64_elf_finish_dynamic_symbol (bfd *output_bfd, |
18156 | | struct bfd_link_info *info, |
18157 | | struct elf_link_hash_entry *h, |
18158 | | Elf_Internal_Sym *sym) |
18159 | 0 | { |
18160 | 0 | struct ppc_link_hash_table *htab; |
18161 | 0 | struct plt_entry *ent; |
18162 | |
|
18163 | 0 | htab = ppc_hash_table (info); |
18164 | |
|
18165 | 0 | if (!htab->opd_abi && !h->def_regular) |
18166 | 0 | for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
18167 | 0 | if (ent->plt.offset != (bfd_vma) -1) |
18168 | 0 | { |
18169 | | /* Mark the symbol as undefined, rather than as |
18170 | | defined in glink. Leave the value if there were |
18171 | | any relocations where pointer equality matters |
18172 | | (this is a clue for the dynamic linker, to make |
18173 | | function pointer comparisons work between an |
18174 | | application and shared library), otherwise set it |
18175 | | to zero. */ |
18176 | 0 | sym->st_shndx = SHN_UNDEF; |
18177 | 0 | if (!h->pointer_equality_needed) |
18178 | 0 | sym->st_value = 0; |
18179 | 0 | else if (!h->ref_regular_nonweak) |
18180 | 0 | { |
18181 | | /* This breaks function pointer comparisons, but |
18182 | | that is better than breaking tests for a NULL |
18183 | | function pointer. */ |
18184 | 0 | sym->st_value = 0; |
18185 | 0 | } |
18186 | 0 | break; |
18187 | 0 | } |
18188 | |
|
18189 | 0 | if (h->needs_copy |
18190 | 0 | && (h->root.type == bfd_link_hash_defined |
18191 | 0 | || h->root.type == bfd_link_hash_defweak) |
18192 | 0 | && (h->root.u.def.section == htab->elf.sdynbss |
18193 | 0 | || h->root.u.def.section == htab->elf.sdynrelro)) |
18194 | 0 | { |
18195 | | /* This symbol needs a copy reloc. Set it up. */ |
18196 | 0 | Elf_Internal_Rela rela; |
18197 | 0 | asection *srel; |
18198 | |
|
18199 | 0 | if (h->dynindx == -1) |
18200 | 0 | abort (); |
18201 | | |
18202 | 0 | rela.r_offset = defined_sym_val (h); |
18203 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); |
18204 | 0 | rela.r_addend = 0; |
18205 | 0 | if (h->root.u.def.section == htab->elf.sdynrelro) |
18206 | 0 | srel = htab->elf.sreldynrelro; |
18207 | 0 | else |
18208 | 0 | srel = htab->elf.srelbss; |
18209 | 0 | BFD_ASSERT (count_and_swap_reloc_out (output_bfd, &rela, srel)); |
18210 | 0 | } |
18211 | | |
18212 | 0 | return true; |
18213 | 0 | } |
18214 | | |
18215 | | /* Used to decide how to sort relocs in an optimal manner for the |
18216 | | dynamic linker, before writing them out. */ |
18217 | | |
18218 | | static enum elf_reloc_type_class |
18219 | | ppc64_elf_reloc_type_class (const struct bfd_link_info *info, |
18220 | | const asection *rel_sec, |
18221 | | const Elf_Internal_Rela *rela) |
18222 | 0 | { |
18223 | 0 | enum elf_ppc64_reloc_type r_type; |
18224 | 0 | struct ppc_link_hash_table *htab = ppc_hash_table (info); |
18225 | |
|
18226 | 0 | if (rel_sec == htab->elf.irelplt) |
18227 | 0 | return reloc_class_ifunc; |
18228 | | |
18229 | 0 | r_type = ELF64_R_TYPE (rela->r_info); |
18230 | 0 | switch (r_type) |
18231 | 0 | { |
18232 | 0 | case R_PPC64_RELATIVE: |
18233 | 0 | return reloc_class_relative; |
18234 | 0 | case R_PPC64_JMP_SLOT: |
18235 | 0 | return reloc_class_plt; |
18236 | 0 | case R_PPC64_COPY: |
18237 | 0 | return reloc_class_copy; |
18238 | 0 | default: |
18239 | 0 | return reloc_class_normal; |
18240 | 0 | } |
18241 | 0 | } |
18242 | | |
18243 | | /* Finish up the dynamic sections. */ |
18244 | | |
18245 | | static bool |
18246 | | ppc64_elf_finish_dynamic_sections (bfd *output_bfd, |
18247 | | struct bfd_link_info *info) |
18248 | 0 | { |
18249 | 0 | struct ppc_link_hash_table *htab; |
18250 | 0 | bfd *dynobj; |
18251 | 0 | asection *sdyn; |
18252 | |
|
18253 | 0 | htab = ppc_hash_table (info); |
18254 | 0 | if (htab == NULL) |
18255 | 0 | return false; |
18256 | | |
18257 | 0 | dynobj = htab->elf.dynobj; |
18258 | 0 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
18259 | |
|
18260 | 0 | if (htab->elf.dynamic_sections_created) |
18261 | 0 | { |
18262 | 0 | Elf64_External_Dyn *dyncon, *dynconend; |
18263 | |
|
18264 | 0 | if (sdyn == NULL || htab->elf.sgot == NULL) |
18265 | 0 | abort (); |
18266 | | |
18267 | 0 | dyncon = (Elf64_External_Dyn *) sdyn->contents; |
18268 | 0 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
18269 | 0 | for (; dyncon < dynconend; dyncon++) |
18270 | 0 | { |
18271 | 0 | Elf_Internal_Dyn dyn; |
18272 | 0 | asection *s; |
18273 | |
|
18274 | 0 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
18275 | |
|
18276 | 0 | switch (dyn.d_tag) |
18277 | 0 | { |
18278 | 0 | default: |
18279 | 0 | continue; |
18280 | | |
18281 | 0 | case DT_PPC64_GLINK: |
18282 | 0 | s = htab->glink; |
18283 | 0 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
18284 | | /* We stupidly defined DT_PPC64_GLINK to be the start |
18285 | | of glink rather than the first entry point, which is |
18286 | | what ld.so needs, and now have a bigger stub to |
18287 | | support automatic multiple TOCs. */ |
18288 | 0 | dyn.d_un.d_ptr += GLINK_PLTRESOLVE_SIZE (htab) - 8 * 4; |
18289 | 0 | break; |
18290 | | |
18291 | 0 | case DT_PPC64_OPD: |
18292 | 0 | s = bfd_get_section_by_name (output_bfd, ".opd"); |
18293 | 0 | if (s == NULL) |
18294 | 0 | continue; |
18295 | 0 | dyn.d_un.d_ptr = s->vma; |
18296 | 0 | break; |
18297 | | |
18298 | 0 | case DT_PPC64_OPT: |
18299 | 0 | if ((htab->do_multi_toc && htab->multi_toc_needed) |
18300 | 0 | || htab->notoc_plt) |
18301 | 0 | dyn.d_un.d_val |= PPC64_OPT_MULTI_TOC; |
18302 | 0 | if (htab->has_plt_localentry0) |
18303 | 0 | dyn.d_un.d_val |= PPC64_OPT_LOCALENTRY; |
18304 | 0 | break; |
18305 | | |
18306 | 0 | case DT_PPC64_OPDSZ: |
18307 | 0 | s = bfd_get_section_by_name (output_bfd, ".opd"); |
18308 | 0 | if (s == NULL) |
18309 | 0 | continue; |
18310 | 0 | dyn.d_un.d_val = s->size; |
18311 | 0 | break; |
18312 | | |
18313 | 0 | case DT_PLTGOT: |
18314 | 0 | s = htab->elf.splt; |
18315 | 0 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
18316 | 0 | break; |
18317 | | |
18318 | 0 | case DT_JMPREL: |
18319 | 0 | s = htab->elf.srelplt; |
18320 | 0 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
18321 | 0 | break; |
18322 | | |
18323 | 0 | case DT_PLTRELSZ: |
18324 | 0 | dyn.d_un.d_val = htab->elf.srelplt->size; |
18325 | 0 | break; |
18326 | | |
18327 | 0 | case DT_TEXTREL: |
18328 | 0 | if (htab->elf.ifunc_resolvers) |
18329 | 0 | info->callbacks->einfo |
18330 | 0 | (_("%P: warning: text relocations and GNU indirect " |
18331 | 0 | "functions may result in a segfault at runtime\n")); |
18332 | 0 | continue; |
18333 | 0 | } |
18334 | | |
18335 | 0 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
18336 | 0 | } |
18337 | 0 | } |
18338 | | |
18339 | 0 | if (htab->elf.sgot != NULL && htab->elf.sgot->size != 0 |
18340 | 0 | && htab->elf.sgot->output_section != bfd_abs_section_ptr) |
18341 | 0 | { |
18342 | | /* Fill in the first entry in the global offset table. |
18343 | | We use it to hold the link-time TOCbase. */ |
18344 | 0 | bfd_put_64 (output_bfd, |
18345 | 0 | elf_gp (output_bfd) + TOC_BASE_OFF, |
18346 | 0 | htab->elf.sgot->contents); |
18347 | | |
18348 | | /* Set .got entry size. */ |
18349 | 0 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize |
18350 | 0 | = 8; |
18351 | 0 | } |
18352 | |
|
18353 | 0 | if (htab->elf.splt != NULL && htab->elf.splt->size != 0 |
18354 | 0 | && htab->elf.splt->output_section != bfd_abs_section_ptr) |
18355 | 0 | { |
18356 | | /* Set .plt entry size. */ |
18357 | 0 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize |
18358 | 0 | = PLT_ENTRY_SIZE (htab); |
18359 | 0 | } |
18360 | | |
18361 | | /* brlt is SEC_LINKER_CREATED, so we need to write out relocs for |
18362 | | brlt ourselves if emitrelocations. */ |
18363 | 0 | if (htab->brlt != NULL |
18364 | 0 | && htab->brlt->reloc_count != 0 |
18365 | 0 | && !_bfd_elf_link_output_relocs (output_bfd, |
18366 | 0 | htab->brlt, |
18367 | 0 | elf_section_data (htab->brlt)->rela.hdr, |
18368 | 0 | elf_section_data (htab->brlt)->relocs, |
18369 | 0 | NULL)) |
18370 | 0 | return false; |
18371 | | |
18372 | 0 | if (htab->glink != NULL |
18373 | 0 | && htab->glink->reloc_count != 0 |
18374 | 0 | && !_bfd_elf_link_output_relocs (output_bfd, |
18375 | 0 | htab->glink, |
18376 | 0 | elf_section_data (htab->glink)->rela.hdr, |
18377 | 0 | elf_section_data (htab->glink)->relocs, |
18378 | 0 | NULL)) |
18379 | 0 | return false; |
18380 | | |
18381 | | |
18382 | 0 | if (htab->glink_eh_frame != NULL |
18383 | 0 | && htab->glink_eh_frame->size != 0 |
18384 | 0 | && htab->glink_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME |
18385 | 0 | && !_bfd_elf_write_section_eh_frame (output_bfd, info, |
18386 | 0 | htab->glink_eh_frame, |
18387 | 0 | htab->glink_eh_frame->contents)) |
18388 | 0 | return false; |
18389 | | |
18390 | | /* We need to handle writing out multiple GOT sections ourselves, |
18391 | | since we didn't add them to DYNOBJ. We know dynobj is the first |
18392 | | bfd. */ |
18393 | 0 | while ((dynobj = dynobj->link.next) != NULL) |
18394 | 0 | { |
18395 | 0 | asection *s; |
18396 | |
|
18397 | 0 | if (!is_ppc64_elf (dynobj)) |
18398 | 0 | continue; |
18399 | | |
18400 | 0 | s = ppc64_elf_tdata (dynobj)->got; |
18401 | 0 | if (s != NULL |
18402 | 0 | && s->size != 0 |
18403 | 0 | && s->output_section != bfd_abs_section_ptr |
18404 | 0 | && !bfd_set_section_contents (output_bfd, s->output_section, |
18405 | 0 | s->contents, s->output_offset, |
18406 | 0 | s->size)) |
18407 | 0 | return false; |
18408 | 0 | s = ppc64_elf_tdata (dynobj)->relgot; |
18409 | 0 | if (s != NULL |
18410 | 0 | && s->size != 0 |
18411 | 0 | && s->output_section != bfd_abs_section_ptr |
18412 | 0 | && !bfd_set_section_contents (output_bfd, s->output_section, |
18413 | 0 | s->contents, s->output_offset, |
18414 | 0 | s->size)) |
18415 | 0 | return false; |
18416 | 0 | } |
18417 | | |
18418 | 0 | return true; |
18419 | 0 | } |
18420 | | |
18421 | | static bool |
18422 | | ppc64_elf_free_cached_info (bfd *abfd) |
18423 | 19.4k | { |
18424 | 19.4k | if (abfd->sections) |
18425 | 2.95k | for (asection *opd = bfd_get_section_by_name (abfd, ".opd"); |
18426 | 2.95k | opd != NULL; |
18427 | 2.95k | opd = bfd_get_next_section_by_name (NULL, opd)) |
18428 | 0 | if (opd->reloc_count == 0) |
18429 | 0 | free (ppc64_elf_section_data (opd)->u.opd.u.contents); |
18430 | | |
18431 | 19.4k | return _bfd_elf_free_cached_info (abfd); |
18432 | 19.4k | } |
18433 | | |
18434 | | #include "elf64-target.h" |
18435 | | |
18436 | | /* FreeBSD support */ |
18437 | | |
18438 | | #undef TARGET_LITTLE_SYM |
18439 | | #define TARGET_LITTLE_SYM powerpc_elf64_fbsd_le_vec |
18440 | | #undef TARGET_LITTLE_NAME |
18441 | | #define TARGET_LITTLE_NAME "elf64-powerpcle-freebsd" |
18442 | | |
18443 | | #undef TARGET_BIG_SYM |
18444 | | #define TARGET_BIG_SYM powerpc_elf64_fbsd_vec |
18445 | | #undef TARGET_BIG_NAME |
18446 | | #define TARGET_BIG_NAME "elf64-powerpc-freebsd" |
18447 | | |
18448 | | #undef ELF_OSABI |
18449 | | #define ELF_OSABI ELFOSABI_FREEBSD |
18450 | | |
18451 | | #undef elf64_bed |
18452 | | #define elf64_bed elf64_powerpc_fbsd_bed |
18453 | | |
18454 | | #include "elf64-target.h" |