/src/binutils-gdb/bfd/elf64-loongarch.c
Line | Count | Source (jump to first uncovered line) |
1 | | #line 1 "elfnn-loongarch.c" |
2 | | /* LoongArch-specific support for 64-bit ELF. |
3 | | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
4 | | Contributed by Loongson Ltd. |
5 | | |
6 | | This file is part of BFD, the Binary File Descriptor library. |
7 | | |
8 | | This program is free software; you can redistribute it and/or modify |
9 | | it under the terms of the GNU General Public License as published by |
10 | | the Free Software Foundation; either version 3 of the License, or |
11 | | (at your option) any later version. |
12 | | |
13 | | This program is distributed in the hope that it will be useful, |
14 | | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | | GNU General Public License for more details. |
17 | | |
18 | | You should have received a copy of the GNU General Public License |
19 | | along with this program; see the file COPYING3. If not, |
20 | | see <http://www.gnu.org/licenses/>. */ |
21 | | |
22 | | #include "ansidecl.h" |
23 | | #include "sysdep.h" |
24 | | #include "bfd.h" |
25 | | #include "libbfd.h" |
26 | 0 | #define ARCH_SIZE 64 |
27 | | #include "elf-bfd.h" |
28 | | #include "objalloc.h" |
29 | | #include "elf/loongarch.h" |
30 | | #include "elfxx-loongarch.h" |
31 | | #include "opcode/loongarch.h" |
32 | | |
33 | | static bool |
34 | | loongarch_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, |
35 | | Elf_Internal_Rela *dst) |
36 | 98 | { |
37 | 98 | cache_ptr->howto = loongarch_elf_rtype_to_howto (abfd, |
38 | 98 | ELF64_R_TYPE (dst->r_info)); |
39 | 98 | return cache_ptr->howto != NULL; |
40 | 98 | } |
41 | | |
42 | | /* LoongArch ELF linker hash entry. */ |
43 | | struct loongarch_elf_link_hash_entry |
44 | | { |
45 | | struct elf_link_hash_entry elf; |
46 | | |
47 | 0 | #define GOT_UNKNOWN 0 |
48 | 0 | #define GOT_NORMAL 1 |
49 | 0 | #define GOT_TLS_GD 2 |
50 | 0 | #define GOT_TLS_IE 4 |
51 | 0 | #define GOT_TLS_LE 8 |
52 | 0 | #define GOT_TLS_GDESC 16 |
53 | | |
54 | | #define GOT_TLS_GD_BOTH_P(tls_type) \ |
55 | 0 | ((tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_GDESC)) |
56 | | #define GOT_TLS_GD_ANY_P(tls_type) \ |
57 | 0 | ((tls_type & GOT_TLS_GD) || (tls_type & GOT_TLS_GDESC)) |
58 | | char tls_type; |
59 | | }; |
60 | | |
61 | | #define loongarch_elf_hash_entry(ent) \ |
62 | 0 | ((struct loongarch_elf_link_hash_entry *) (ent)) |
63 | | |
64 | | struct _bfd_loongarch_elf_obj_tdata |
65 | | { |
66 | | struct elf_obj_tdata root; |
67 | | |
68 | | /* The tls_type for each local got entry. */ |
69 | | char *local_got_tls_type; |
70 | | }; |
71 | | |
72 | | #define _bfd_loongarch_elf_tdata(abfd) \ |
73 | 0 | ((struct _bfd_loongarch_elf_obj_tdata *) (abfd)->tdata.any) |
74 | | |
75 | | #define _bfd_loongarch_elf_local_got_tls_type(abfd) \ |
76 | 0 | (_bfd_loongarch_elf_tdata (abfd)->local_got_tls_type) |
77 | | |
78 | | #define _bfd_loongarch_elf_tls_type(abfd, h, symndx) \ |
79 | 0 | (*((h) != NULL \ |
80 | 0 | ? &loongarch_elf_hash_entry (h)->tls_type \ |
81 | 0 | : &_bfd_loongarch_elf_local_got_tls_type (abfd)[symndx])) |
82 | | |
83 | | #define is_loongarch_elf(bfd) \ |
84 | 0 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ |
85 | 0 | && elf_tdata (bfd) != NULL \ |
86 | 0 | && elf_object_id (bfd) == LARCH_ELF_DATA) |
87 | | |
88 | | struct loongarch_elf_link_hash_table |
89 | | { |
90 | | struct elf_link_hash_table elf; |
91 | | |
92 | | /* Short-cuts to get to dynamic linker sections. */ |
93 | | asection *sdyntdata; |
94 | | |
95 | | /* Small local sym to section mapping cache. */ |
96 | | struct sym_cache sym_cache; |
97 | | |
98 | | /* Used by local STT_GNU_IFUNC symbols. */ |
99 | | htab_t loc_hash_table; |
100 | | void *loc_hash_memory; |
101 | | |
102 | | /* The max alignment of output sections. */ |
103 | | bfd_vma max_alignment; |
104 | | |
105 | | /* The data segment phase, don't relax the section |
106 | | when it is exp_seg_relro_adjust. */ |
107 | | int *data_segment_phase; |
108 | | }; |
109 | | |
110 | | /* Get the LoongArch ELF linker hash table from a link_info structure. */ |
111 | | #define loongarch_elf_hash_table(p) \ |
112 | 0 | (elf_hash_table_id (elf_hash_table (p)) == LARCH_ELF_DATA \ |
113 | 0 | ? ((struct loongarch_elf_link_hash_table *) ((p)->hash)) \ |
114 | 0 | : NULL) |
115 | | |
116 | 0 | #define MINUS_ONE ((bfd_vma) 0 - 1) |
117 | | |
118 | 0 | #define sec_addr(sec) ((sec)->output_section->vma + (sec)->output_offset) |
119 | | |
120 | 0 | #define LARCH_ELF_LOG_WORD_BYTES (ARCH_SIZE == 32 ? 2 : 3) |
121 | 0 | #define LARCH_ELF_WORD_BYTES (1 << LARCH_ELF_LOG_WORD_BYTES) |
122 | | |
123 | 0 | #define PLT_HEADER_INSNS 8 |
124 | 0 | #define PLT_HEADER_SIZE (PLT_HEADER_INSNS * 4) |
125 | | |
126 | 0 | #define PLT_ENTRY_INSNS 4 |
127 | 0 | #define PLT_ENTRY_SIZE (PLT_ENTRY_INSNS * 4) |
128 | | |
129 | 0 | #define GOT_ENTRY_SIZE (LARCH_ELF_WORD_BYTES) |
130 | | |
131 | | /* Reserve two entries of GOTPLT for ld.so, one is used for PLT |
132 | | resolver _dl_runtime_resolve, the other is used for link map. */ |
133 | 0 | #define GOTPLT_HEADER_SIZE (GOT_ENTRY_SIZE * 2) |
134 | | |
135 | | #define elf_backend_want_got_plt 1 |
136 | | |
137 | | #define elf_backend_plt_readonly 1 |
138 | | |
139 | | #define elf_backend_want_plt_sym 1 |
140 | | #define elf_backend_plt_alignment 4 |
141 | | #define elf_backend_can_gc_sections 1 |
142 | | #define elf_backend_can_refcount 1 |
143 | | #define elf_backend_want_got_sym 1 |
144 | | |
145 | | #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 1) |
146 | | |
147 | | #define elf_backend_want_dynrelro 1 |
148 | | #define elf_backend_rela_normal 1 |
149 | | #define elf_backend_default_execstack 0 |
150 | | |
151 | | #define IS_LOONGARCH_TLS_TRANS_RELOC(R_TYPE) \ |
152 | 0 | ((R_TYPE) == R_LARCH_TLS_DESC_PC_HI20 \ |
153 | 0 | || (R_TYPE) == R_LARCH_TLS_DESC_PC_LO12 \ |
154 | 0 | || (R_TYPE) == R_LARCH_TLS_DESC_LD \ |
155 | 0 | || (R_TYPE) == R_LARCH_TLS_DESC_CALL \ |
156 | 0 | || (R_TYPE) == R_LARCH_TLS_IE_PC_HI20 \ |
157 | 0 | || (R_TYPE) == R_LARCH_TLS_IE_PC_LO12) |
158 | | |
159 | | #define IS_OUTDATED_TLS_LE_RELOC(R_TYPE) \ |
160 | | ((R_TYPE) == R_LARCH_TLS_LE_HI20 \ |
161 | | || (R_TYPE) == R_LARCH_TLS_LE_LO12 \ |
162 | | || (R_TYPE) == R_LARCH_TLS_LE64_LO20 \ |
163 | | || (R_TYPE) == R_LARCH_TLS_LE64_HI12) |
164 | | |
165 | | /* If TLS GD/IE need dynamic relocations, INDX will be the dynamic indx, |
166 | | and set NEED_RELOC to true used in allocate_dynrelocs and |
167 | | loongarch_elf_relocate_section for TLS GD/IE. */ |
168 | | #define LARCH_TLS_GD_IE_NEED_DYN_RELOC(INFO, DYN, H, INDX, NEED_RELOC) \ |
169 | 0 | do \ |
170 | 0 | { \ |
171 | 0 | if ((H) != NULL \ |
172 | 0 | && (H)->dynindx != -1 \ |
173 | 0 | && WILL_CALL_FINISH_DYNAMIC_SYMBOL ((DYN), \ |
174 | 0 | bfd_link_pic (INFO), (H))) \ |
175 | 0 | (INDX) = (H)->dynindx; \ |
176 | 0 | if (((H) == NULL \ |
177 | 0 | || ELF_ST_VISIBILITY ((H)->other) == STV_DEFAULT \ |
178 | 0 | || (H)->root.type != bfd_link_hash_undefweak) \ |
179 | 0 | && (!bfd_link_executable (INFO) \ |
180 | 0 | || (INDX) != 0)) \ |
181 | 0 | (NEED_RELOC) = true; \ |
182 | 0 | } \ |
183 | 0 | while (0) |
184 | | |
185 | | |
186 | | /* Generate a PLT header. */ |
187 | | |
188 | | static bool |
189 | | loongarch_make_plt_header (bfd_vma got_plt_addr, bfd_vma plt_header_addr, |
190 | | uint32_t *entry) |
191 | 0 | { |
192 | 0 | bfd_vma pcrel = got_plt_addr - plt_header_addr; |
193 | 0 | bfd_vma hi, lo; |
194 | |
|
195 | 0 | if (pcrel + 0x80000800 > 0xffffffff) |
196 | 0 | { |
197 | 0 | _bfd_error_handler (_("%#" PRIx64 " invaild imm"), (uint64_t) pcrel); |
198 | 0 | bfd_set_error (bfd_error_bad_value); |
199 | 0 | return false; |
200 | 0 | } |
201 | 0 | hi = ((pcrel + 0x800) >> 12) & 0xfffff; |
202 | 0 | lo = pcrel & 0xfff; |
203 | | |
204 | | /* pcaddu12i $t2, %hi(%pcrel(.got.plt)) |
205 | | sub.[wd] $t1, $t1, $t3 |
206 | | ld.[wd] $t3, $t2, %lo(%pcrel(.got.plt)) # _dl_runtime_resolve |
207 | | addi.[wd] $t1, $t1, -(PLT_HEADER_SIZE + 12) |
208 | | addi.[wd] $t0, $t2, %lo(%pcrel(.got.plt)) |
209 | | srli.[wd] $t1, $t1, log2(16 / GOT_ENTRY_SIZE) |
210 | | ld.[wd] $t0, $t0, GOT_ENTRY_SIZE |
211 | | jirl $r0, $t3, 0 */ |
212 | |
|
213 | 0 | if (GOT_ENTRY_SIZE == 8) |
214 | 0 | { |
215 | 0 | entry[0] = 0x1c00000e | (hi & 0xfffff) << 5; |
216 | 0 | entry[1] = 0x0011bdad; |
217 | 0 | entry[2] = 0x28c001cf | (lo & 0xfff) << 10; |
218 | 0 | entry[3] = 0x02c001ad | ((-(PLT_HEADER_SIZE + 12)) & 0xfff) << 10; |
219 | 0 | entry[4] = 0x02c001cc | (lo & 0xfff) << 10; |
220 | 0 | entry[5] = 0x004501ad | (4 - LARCH_ELF_LOG_WORD_BYTES) << 10; |
221 | 0 | entry[6] = 0x28c0018c | GOT_ENTRY_SIZE << 10; |
222 | 0 | entry[7] = 0x4c0001e0; |
223 | 0 | } |
224 | 0 | else |
225 | 0 | { |
226 | 0 | entry[0] = 0x1c00000e | (hi & 0xfffff) << 5; |
227 | 0 | entry[1] = 0x00113dad; |
228 | 0 | entry[2] = 0x288001cf | (lo & 0xfff) << 10; |
229 | 0 | entry[3] = 0x028001ad | ((-(PLT_HEADER_SIZE + 12)) & 0xfff) << 10; |
230 | 0 | entry[4] = 0x028001cc | (lo & 0xfff) << 10; |
231 | 0 | entry[5] = 0x004481ad | (4 - LARCH_ELF_LOG_WORD_BYTES) << 10; |
232 | 0 | entry[6] = 0x2880018c | GOT_ENTRY_SIZE << 10; |
233 | 0 | entry[7] = 0x4c0001e0; |
234 | 0 | } |
235 | 0 | return true; |
236 | 0 | } |
237 | | |
238 | | /* Generate a PLT entry. */ |
239 | | |
240 | | static bool |
241 | | loongarch_make_plt_entry (bfd_vma got_plt_entry_addr, bfd_vma plt_entry_addr, |
242 | | uint32_t *entry) |
243 | 0 | { |
244 | 0 | bfd_vma pcrel = got_plt_entry_addr - plt_entry_addr; |
245 | 0 | bfd_vma hi, lo; |
246 | |
|
247 | 0 | if (pcrel + 0x80000800 > 0xffffffff) |
248 | 0 | { |
249 | 0 | _bfd_error_handler (_("%#" PRIx64 " invaild imm"), (uint64_t) pcrel); |
250 | 0 | bfd_set_error (bfd_error_bad_value); |
251 | 0 | return false; |
252 | 0 | } |
253 | 0 | hi = ((pcrel + 0x800) >> 12) & 0xfffff; |
254 | 0 | lo = pcrel & 0xfff; |
255 | |
|
256 | 0 | entry[0] = 0x1c00000f | (hi & 0xfffff) << 5; |
257 | 0 | entry[1] = ((GOT_ENTRY_SIZE == 8 ? 0x28c001ef : 0x288001ef) |
258 | 0 | | (lo & 0xfff) << 10); |
259 | 0 | entry[2] = 0x4c0001ed; /* jirl $r13, $15, 0 */ |
260 | 0 | entry[3] = 0x03400000; /* nop */ |
261 | |
|
262 | 0 | return true; |
263 | 0 | } |
264 | | |
265 | | /* Create an entry in an LoongArch ELF linker hash table. */ |
266 | | |
267 | | static struct bfd_hash_entry * |
268 | | link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
269 | | const char *string) |
270 | 0 | { |
271 | 0 | struct loongarch_elf_link_hash_entry *eh; |
272 | | |
273 | | /* Allocate the structure if it has not already been allocated by a |
274 | | subclass. */ |
275 | 0 | if (entry == NULL) |
276 | 0 | { |
277 | 0 | entry = bfd_hash_allocate (table, sizeof (*eh)); |
278 | 0 | if (entry == NULL) |
279 | 0 | return entry; |
280 | 0 | } |
281 | | |
282 | | /* Call the allocation method of the superclass. */ |
283 | 0 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
284 | 0 | if (entry != NULL) |
285 | 0 | { |
286 | 0 | eh = (struct loongarch_elf_link_hash_entry *) entry; |
287 | 0 | eh->tls_type = GOT_UNKNOWN; |
288 | 0 | } |
289 | |
|
290 | 0 | return entry; |
291 | 0 | } |
292 | | |
293 | | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
294 | | for local symbol so that we can handle local STT_GNU_IFUNC symbols |
295 | | as global symbol. We reuse indx and dynstr_index for local symbol |
296 | | hash since they aren't used by global symbols in this backend. */ |
297 | | |
298 | | static hashval_t |
299 | | elf64_loongarch_local_htab_hash (const void *ptr) |
300 | 0 | { |
301 | 0 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) ptr; |
302 | 0 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
303 | 0 | } |
304 | | |
305 | | /* Compare local hash entries. */ |
306 | | |
307 | | static int |
308 | | elf64_loongarch_local_htab_eq (const void *ptr1, const void *ptr2) |
309 | 0 | { |
310 | 0 | struct elf_link_hash_entry *h1 = (struct elf_link_hash_entry *) ptr1; |
311 | 0 | struct elf_link_hash_entry *h2 = (struct elf_link_hash_entry *) ptr2; |
312 | |
|
313 | 0 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; |
314 | 0 | } |
315 | | |
316 | | /* Find and/or create a hash entry for local symbol. */ |
317 | | static struct elf_link_hash_entry * |
318 | | elf64_loongarch_get_local_sym_hash (struct loongarch_elf_link_hash_table *htab, |
319 | | bfd *abfd, const Elf_Internal_Rela *rel, |
320 | | bool create) |
321 | 0 | { |
322 | 0 | struct loongarch_elf_link_hash_entry e, *ret; |
323 | 0 | asection *sec = abfd->sections; |
324 | 0 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, ELF64_R_SYM (rel->r_info)); |
325 | 0 | void **slot; |
326 | |
|
327 | 0 | e.elf.indx = sec->id; |
328 | 0 | e.elf.dynstr_index = ELF64_R_SYM (rel->r_info); |
329 | 0 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
330 | 0 | create ? INSERT : NO_INSERT); |
331 | |
|
332 | 0 | if (!slot) |
333 | 0 | return NULL; |
334 | | |
335 | 0 | if (*slot) |
336 | 0 | { |
337 | 0 | ret = (struct loongarch_elf_link_hash_entry *) *slot; |
338 | 0 | return &ret->elf; |
339 | 0 | } |
340 | | |
341 | 0 | ret = ((struct loongarch_elf_link_hash_entry *) |
342 | 0 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
343 | 0 | sizeof (struct loongarch_elf_link_hash_entry))); |
344 | 0 | if (ret) |
345 | 0 | { |
346 | 0 | memset (ret, 0, sizeof (*ret)); |
347 | 0 | ret->elf.indx = sec->id; |
348 | 0 | ret->elf.pointer_equality_needed = 0; |
349 | 0 | ret->elf.dynstr_index = ELF64_R_SYM (rel->r_info); |
350 | 0 | ret->elf.dynindx = -1; |
351 | 0 | ret->elf.needs_plt = 0; |
352 | 0 | ret->elf.plt.refcount = -1; |
353 | 0 | ret->elf.got.refcount = -1; |
354 | 0 | ret->elf.def_dynamic = 0; |
355 | 0 | ret->elf.def_regular = 1; |
356 | 0 | ret->elf.ref_dynamic = 0; /* This should be always 0 for local. */ |
357 | 0 | ret->elf.ref_regular = 0; |
358 | 0 | ret->elf.forced_local = 1; |
359 | 0 | ret->elf.root.type = bfd_link_hash_defined; |
360 | 0 | *slot = ret; |
361 | 0 | } |
362 | 0 | return &ret->elf; |
363 | 0 | } |
364 | | |
365 | | /* Destroy an LoongArch elf linker hash table. */ |
366 | | |
367 | | static void |
368 | | elf64_loongarch_link_hash_table_free (bfd *obfd) |
369 | 0 | { |
370 | 0 | struct loongarch_elf_link_hash_table *ret; |
371 | 0 | ret = (struct loongarch_elf_link_hash_table *) obfd->link.hash; |
372 | |
|
373 | 0 | if (ret->loc_hash_table) |
374 | 0 | htab_delete (ret->loc_hash_table); |
375 | 0 | if (ret->loc_hash_memory) |
376 | 0 | objalloc_free ((struct objalloc *) ret->loc_hash_memory); |
377 | |
|
378 | 0 | _bfd_elf_link_hash_table_free (obfd); |
379 | 0 | } |
380 | | |
381 | | /* Create a LoongArch ELF linker hash table. */ |
382 | | |
383 | | static struct bfd_link_hash_table * |
384 | | loongarch_elf_link_hash_table_create (bfd *abfd) |
385 | 0 | { |
386 | 0 | struct loongarch_elf_link_hash_table *ret; |
387 | 0 | bfd_size_type amt = sizeof (struct loongarch_elf_link_hash_table); |
388 | |
|
389 | 0 | ret = (struct loongarch_elf_link_hash_table *) bfd_zmalloc (amt); |
390 | 0 | if (ret == NULL) |
391 | 0 | return NULL; |
392 | | |
393 | 0 | if (!_bfd_elf_link_hash_table_init |
394 | 0 | (&ret->elf, abfd, link_hash_newfunc, |
395 | 0 | sizeof (struct loongarch_elf_link_hash_entry), LARCH_ELF_DATA)) |
396 | 0 | { |
397 | 0 | free (ret); |
398 | 0 | return NULL; |
399 | 0 | } |
400 | | |
401 | 0 | ret->max_alignment = MINUS_ONE; |
402 | |
|
403 | 0 | ret->loc_hash_table = htab_try_create (1024, elf64_loongarch_local_htab_hash, |
404 | 0 | elf64_loongarch_local_htab_eq, NULL); |
405 | 0 | ret->loc_hash_memory = objalloc_create (); |
406 | 0 | if (!ret->loc_hash_table || !ret->loc_hash_memory) |
407 | 0 | { |
408 | 0 | elf64_loongarch_link_hash_table_free (abfd); |
409 | 0 | return NULL; |
410 | 0 | } |
411 | 0 | ret->elf.root.hash_table_free = elf64_loongarch_link_hash_table_free; |
412 | |
|
413 | 0 | return &ret->elf.root; |
414 | 0 | } |
415 | | |
416 | | /* Merge backend specific data from an object file to the output |
417 | | object file when linking. */ |
418 | | |
419 | | static bool |
420 | | elf64_loongarch_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
421 | 0 | { |
422 | 0 | bfd *obfd = info->output_bfd; |
423 | 0 | flagword in_flags = elf_elfheader (ibfd)->e_flags; |
424 | 0 | flagword out_flags = elf_elfheader (obfd)->e_flags; |
425 | |
|
426 | 0 | if (!is_loongarch_elf (ibfd) || !is_loongarch_elf (obfd)) |
427 | 0 | return true; |
428 | | |
429 | 0 | if (strcmp (bfd_get_target (ibfd), bfd_get_target (obfd)) != 0) |
430 | 0 | { |
431 | 0 | _bfd_error_handler (_("%pB: ABI is incompatible with that of " |
432 | 0 | "the selected emulation:\n" |
433 | 0 | " target emulation `%s' does not match `%s'"), |
434 | 0 | ibfd, bfd_get_target (ibfd), bfd_get_target (obfd)); |
435 | 0 | return false; |
436 | 0 | } |
437 | | |
438 | 0 | if (!_bfd_elf_merge_object_attributes (ibfd, info)) |
439 | 0 | return false; |
440 | | |
441 | | /* If the input BFD is not a dynamic object and it does not contain any |
442 | | non-data sections, do not account its ABI. For example, various |
443 | | packages produces such data-only relocatable objects with |
444 | | `ld -r -b binary` or `objcopy`, and these objects have zero e_flags. |
445 | | But they are compatible with all ABIs. */ |
446 | 0 | if (!(ibfd->flags & DYNAMIC)) |
447 | 0 | { |
448 | 0 | asection *sec; |
449 | 0 | bool have_code_sections = false; |
450 | 0 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
451 | 0 | if ((bfd_section_flags (sec) |
452 | 0 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
453 | 0 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
454 | 0 | { |
455 | 0 | have_code_sections = true; |
456 | 0 | break; |
457 | 0 | } |
458 | 0 | if (!have_code_sections) |
459 | 0 | return true; |
460 | 0 | } |
461 | | |
462 | 0 | if (!elf_flags_init (obfd)) |
463 | 0 | { |
464 | 0 | elf_flags_init (obfd) = true; |
465 | 0 | elf_elfheader (obfd)->e_flags = in_flags; |
466 | 0 | return true; |
467 | 0 | } |
468 | 0 | else if (out_flags != in_flags) |
469 | 0 | { |
470 | 0 | if ((EF_LOONGARCH_IS_OBJ_V0 (out_flags) |
471 | 0 | && EF_LOONGARCH_IS_OBJ_V1 (in_flags)) |
472 | 0 | || (EF_LOONGARCH_IS_OBJ_V0 (in_flags) |
473 | 0 | && EF_LOONGARCH_IS_OBJ_V1 (out_flags))) |
474 | 0 | { |
475 | 0 | elf_elfheader (obfd)->e_flags |= EF_LOONGARCH_OBJABI_V1; |
476 | 0 | out_flags = elf_elfheader (obfd)->e_flags; |
477 | 0 | in_flags = out_flags; |
478 | 0 | } |
479 | 0 | } |
480 | | |
481 | | /* Disallow linking different ABIs. */ |
482 | | /* Only check relocation version. |
483 | | The obj_v0 is compatible with obj_v1. */ |
484 | 0 | if (EF_LOONGARCH_ABI(out_flags ^ in_flags) & EF_LOONGARCH_ABI_MASK) |
485 | 0 | { |
486 | 0 | _bfd_error_handler (_("%pB: can't link different ABI object."), ibfd); |
487 | 0 | goto fail; |
488 | 0 | } |
489 | | |
490 | 0 | return true; |
491 | | |
492 | 0 | fail: |
493 | 0 | bfd_set_error (bfd_error_bad_value); |
494 | 0 | return false; |
495 | 0 | } |
496 | | |
497 | | /* Create the .got section. */ |
498 | | |
499 | | static bool |
500 | | loongarch_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
501 | 0 | { |
502 | 0 | flagword flags; |
503 | 0 | char *name; |
504 | 0 | asection *s, *s_got; |
505 | 0 | struct elf_link_hash_entry *h; |
506 | 0 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
507 | 0 | struct elf_link_hash_table *htab = elf_hash_table (info); |
508 | | |
509 | | /* This function may be called more than once. */ |
510 | 0 | if (htab->sgot != NULL) |
511 | 0 | return true; |
512 | | |
513 | 0 | flags = bed->dynamic_sec_flags; |
514 | 0 | name = bed->rela_plts_and_copies_p ? ".rela.got" : ".rel.got"; |
515 | 0 | s = bfd_make_section_anyway_with_flags (abfd, name, flags | SEC_READONLY); |
516 | |
|
517 | 0 | if (s == NULL || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
518 | 0 | return false; |
519 | 0 | htab->srelgot = s; |
520 | |
|
521 | 0 | s = s_got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
522 | 0 | if (s == NULL || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
523 | 0 | return false; |
524 | 0 | htab->sgot = s; |
525 | | |
526 | | /* The first bit of the global offset table is the header. */ |
527 | 0 | s->size += bed->got_header_size; |
528 | |
|
529 | 0 | if (bed->want_got_plt) |
530 | 0 | { |
531 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
532 | 0 | if (s == NULL || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
533 | 0 | return false; |
534 | 0 | htab->sgotplt = s; |
535 | | |
536 | | /* Reserve room for the header. */ |
537 | 0 | s->size = GOTPLT_HEADER_SIZE; |
538 | 0 | } |
539 | | |
540 | 0 | if (bed->want_got_sym) |
541 | 0 | { |
542 | | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got |
543 | | section. We don't do this in the linker script because we don't want |
544 | | to define the symbol if we are not creating a global offset table. */ |
545 | 0 | h = _bfd_elf_define_linkage_sym (abfd, info, s_got, |
546 | 0 | "_GLOBAL_OFFSET_TABLE_"); |
547 | 0 | elf_hash_table (info)->hgot = h; |
548 | 0 | if (h == NULL) |
549 | 0 | return false; |
550 | 0 | } |
551 | 0 | return true; |
552 | 0 | } |
553 | | |
554 | | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
555 | | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our |
556 | | hash table. */ |
557 | | |
558 | | static bool |
559 | | loongarch_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
560 | 0 | { |
561 | 0 | struct loongarch_elf_link_hash_table *htab; |
562 | |
|
563 | 0 | htab = loongarch_elf_hash_table (info); |
564 | 0 | BFD_ASSERT (htab != NULL); |
565 | |
|
566 | 0 | if (!loongarch_elf_create_got_section (dynobj, info)) |
567 | 0 | return false; |
568 | | |
569 | 0 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
570 | 0 | return false; |
571 | | |
572 | 0 | if (!bfd_link_pic (info)) |
573 | 0 | htab->sdyntdata |
574 | 0 | = bfd_make_section_anyway_with_flags (dynobj, ".tdata.dyn", |
575 | 0 | SEC_ALLOC | SEC_THREAD_LOCAL); |
576 | |
|
577 | 0 | if (!htab->elf.splt || !htab->elf.srelplt || !htab->elf.sdynbss |
578 | 0 | || (!bfd_link_pic (info) && (!htab->elf.srelbss || !htab->sdyntdata))) |
579 | 0 | abort (); |
580 | | |
581 | 0 | return true; |
582 | 0 | } |
583 | | |
584 | | static bool |
585 | | loongarch_elf_record_tls_and_got_reference (bfd *abfd, |
586 | | struct bfd_link_info *info, |
587 | | struct elf_link_hash_entry *h, |
588 | | unsigned long symndx, |
589 | | char tls_type) |
590 | 0 | { |
591 | 0 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); |
592 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
593 | | |
594 | | /* This is a global offset table entry for a local symbol. */ |
595 | 0 | if (elf_local_got_refcounts (abfd) == NULL) |
596 | 0 | { |
597 | 0 | bfd_size_type size = |
598 | 0 | symtab_hdr->sh_info * (sizeof (bfd_vma) + sizeof (tls_type)); |
599 | 0 | if (!(elf_local_got_refcounts (abfd) = bfd_zalloc (abfd, size))) |
600 | 0 | return false; |
601 | 0 | _bfd_loongarch_elf_local_got_tls_type (abfd) = |
602 | 0 | (char *) (elf_local_got_refcounts (abfd) + symtab_hdr->sh_info); |
603 | 0 | } |
604 | | |
605 | 0 | switch (tls_type) |
606 | 0 | { |
607 | 0 | case GOT_NORMAL: |
608 | 0 | case GOT_TLS_GD: |
609 | 0 | case GOT_TLS_IE: |
610 | 0 | case GOT_TLS_GDESC: |
611 | | /* Need GOT. */ |
612 | 0 | if (htab->elf.sgot == NULL |
613 | 0 | && !loongarch_elf_create_got_section (htab->elf.dynobj, info)) |
614 | 0 | return false; |
615 | 0 | if (h) |
616 | 0 | { |
617 | 0 | if (h->got.refcount < 0) |
618 | 0 | h->got.refcount = 0; |
619 | 0 | h->got.refcount++; |
620 | 0 | } |
621 | 0 | else |
622 | 0 | elf_local_got_refcounts (abfd)[symndx]++; |
623 | 0 | break; |
624 | 0 | case GOT_TLS_LE: |
625 | | /* No need for GOT. */ |
626 | 0 | break; |
627 | 0 | default: |
628 | 0 | _bfd_error_handler (_("Internal error: unreachable.")); |
629 | 0 | return false; |
630 | 0 | } |
631 | | |
632 | 0 | char *new_tls_type = &_bfd_loongarch_elf_tls_type (abfd, h, symndx); |
633 | 0 | *new_tls_type |= tls_type; |
634 | | |
635 | | /* If a symbol is accessed by both IE and DESC, relax DESC to IE. */ |
636 | 0 | if ((*new_tls_type & GOT_TLS_IE) && (*new_tls_type & GOT_TLS_GDESC)) |
637 | 0 | *new_tls_type &= ~ (GOT_TLS_GDESC); |
638 | 0 | if ((*new_tls_type & GOT_NORMAL) && (*new_tls_type & ~GOT_NORMAL)) |
639 | 0 | { |
640 | 0 | _bfd_error_handler (_("%pB: `%s' accessed both as normal and " |
641 | 0 | "thread local symbol"), |
642 | 0 | abfd, |
643 | 0 | h ? h->root.root.string : "<local>"); |
644 | 0 | return false; |
645 | 0 | } |
646 | | |
647 | 0 | return true; |
648 | 0 | } |
649 | | |
650 | | static unsigned int |
651 | | loongarch_reloc_got_type (unsigned int r_type) |
652 | 0 | { |
653 | 0 | switch (r_type) |
654 | 0 | { |
655 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
656 | 0 | case R_LARCH_TLS_DESC_PC_LO12: |
657 | 0 | case R_LARCH_TLS_DESC_LD: |
658 | 0 | case R_LARCH_TLS_DESC_CALL: |
659 | 0 | return GOT_TLS_GDESC; |
660 | | |
661 | 0 | case R_LARCH_TLS_IE_PC_HI20: |
662 | 0 | case R_LARCH_TLS_IE_PC_LO12: |
663 | 0 | return GOT_TLS_IE; |
664 | | |
665 | 0 | default: |
666 | 0 | break; |
667 | 0 | } |
668 | 0 | return GOT_UNKNOWN; |
669 | 0 | } |
670 | | |
671 | | /* Return true if tls type transition can be performed. */ |
672 | | static bool |
673 | | loongarch_can_trans_tls (bfd *input_bfd, |
674 | | struct bfd_link_info *info, |
675 | | struct elf_link_hash_entry *h, |
676 | | unsigned int r_symndx, |
677 | | unsigned int r_type) |
678 | 0 | { |
679 | 0 | char symbol_tls_type; |
680 | 0 | unsigned int reloc_got_type; |
681 | | |
682 | | /* Only TLS DESC/IE in normal code mode will perform type |
683 | | transition. */ |
684 | 0 | if (! IS_LOONGARCH_TLS_TRANS_RELOC (r_type)) |
685 | 0 | return false; |
686 | | |
687 | | /* Obtaining tls got type here may occur before |
688 | | loongarch_elf_record_tls_and_got_reference, so it is necessary |
689 | | to ensure that tls got type has been initialized, otherwise it |
690 | | is set to GOT_UNKNOWN. */ |
691 | 0 | symbol_tls_type = GOT_UNKNOWN; |
692 | 0 | if (_bfd_loongarch_elf_local_got_tls_type (input_bfd) || h) |
693 | 0 | symbol_tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); |
694 | |
|
695 | 0 | reloc_got_type = loongarch_reloc_got_type (r_type); |
696 | |
|
697 | 0 | if (symbol_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) |
698 | 0 | return true; |
699 | | |
700 | 0 | if (! bfd_link_executable (info)) |
701 | 0 | return false; |
702 | | |
703 | 0 | if (h && h->root.type == bfd_link_hash_undefweak) |
704 | 0 | return false; |
705 | | |
706 | 0 | return true; |
707 | 0 | } |
708 | | |
709 | | /* The type of relocation that can be transitioned. */ |
710 | | static unsigned int |
711 | | loongarch_tls_transition_without_check (struct bfd_link_info *info, |
712 | | unsigned int r_type, |
713 | | struct elf_link_hash_entry *h) |
714 | 0 | { |
715 | 0 | bool local_exec = bfd_link_executable (info) |
716 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h); |
717 | |
|
718 | 0 | switch (r_type) |
719 | 0 | { |
720 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
721 | 0 | return (local_exec |
722 | 0 | ? R_LARCH_TLS_LE_HI20 |
723 | 0 | : R_LARCH_TLS_IE_PC_HI20); |
724 | | |
725 | 0 | case R_LARCH_TLS_DESC_PC_LO12: |
726 | 0 | return (local_exec |
727 | 0 | ? R_LARCH_TLS_LE_LO12 |
728 | 0 | : R_LARCH_TLS_IE_PC_LO12); |
729 | | |
730 | 0 | case R_LARCH_TLS_DESC_LD: |
731 | 0 | case R_LARCH_TLS_DESC_CALL: |
732 | 0 | return R_LARCH_NONE; |
733 | | |
734 | 0 | case R_LARCH_TLS_IE_PC_HI20: |
735 | 0 | return local_exec ? R_LARCH_TLS_LE_HI20 : r_type; |
736 | | |
737 | 0 | case R_LARCH_TLS_IE_PC_LO12: |
738 | 0 | return local_exec ? R_LARCH_TLS_LE_LO12 : r_type; |
739 | | |
740 | 0 | default: |
741 | 0 | break; |
742 | 0 | } |
743 | | |
744 | 0 | return r_type; |
745 | 0 | } |
746 | | |
747 | | static unsigned int |
748 | | loongarch_tls_transition (bfd *input_bfd, |
749 | | struct bfd_link_info *info, |
750 | | struct elf_link_hash_entry *h, |
751 | | unsigned int r_symndx, |
752 | | unsigned int r_type) |
753 | 0 | { |
754 | 0 | if (! loongarch_can_trans_tls (input_bfd, info, h, r_symndx, r_type)) |
755 | 0 | return r_type; |
756 | | |
757 | 0 | return loongarch_tls_transition_without_check (info, r_type, h); |
758 | 0 | } |
759 | | |
760 | | /* Look through the relocs for a section during the first phase, and |
761 | | allocate space in the global offset table or procedure linkage |
762 | | table. */ |
763 | | |
764 | | static bool |
765 | | bad_static_reloc (bfd *abfd, const Elf_Internal_Rela *rel, asection *sec, |
766 | | unsigned r_type, struct elf_link_hash_entry *h, |
767 | | Elf_Internal_Sym *isym) |
768 | 0 | { |
769 | | /* We propably can improve the information to tell users that they should |
770 | | be recompile the code with -fPIC or -fPIE, just like what x86 does. */ |
771 | 0 | reloc_howto_type * r = loongarch_elf_rtype_to_howto (abfd, r_type); |
772 | 0 | const char *name = NULL; |
773 | |
|
774 | 0 | if (h) |
775 | 0 | name = h->root.root.string; |
776 | 0 | else if (isym) |
777 | 0 | name = bfd_elf_string_from_elf_section (abfd, |
778 | 0 | elf_symtab_hdr (abfd).sh_link, |
779 | 0 | isym->st_name); |
780 | 0 | if (name == NULL || *name == '\0') |
781 | 0 | name ="<nameless>"; |
782 | |
|
783 | 0 | (*_bfd_error_handler) |
784 | 0 | (_("%pB:(%pA+%#lx): relocation %s against `%s` can not be used when making " |
785 | 0 | "a shared object; recompile with -fPIC"), |
786 | 0 | abfd, sec, (long) rel->r_offset, r ? r->name : _("<unknown>"), name); |
787 | 0 | bfd_set_error (bfd_error_bad_value); |
788 | 0 | return false; |
789 | 0 | } |
790 | | |
791 | | static bool |
792 | | loongarch_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
793 | | asection *sec, const Elf_Internal_Rela *relocs) |
794 | 0 | { |
795 | 0 | struct loongarch_elf_link_hash_table *htab; |
796 | 0 | Elf_Internal_Shdr *symtab_hdr; |
797 | 0 | struct elf_link_hash_entry **sym_hashes; |
798 | 0 | const Elf_Internal_Rela *rel; |
799 | 0 | asection *sreloc = NULL; |
800 | |
|
801 | 0 | if (bfd_link_relocatable (info)) |
802 | 0 | return true; |
803 | | |
804 | 0 | htab = loongarch_elf_hash_table (info); |
805 | 0 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
806 | 0 | sym_hashes = elf_sym_hashes (abfd); |
807 | |
|
808 | 0 | if (htab->elf.dynobj == NULL) |
809 | 0 | htab->elf.dynobj = abfd; |
810 | |
|
811 | 0 | for (rel = relocs; rel < relocs + sec->reloc_count; rel++) |
812 | 0 | { |
813 | 0 | unsigned int r_type; |
814 | 0 | unsigned int r_symndx; |
815 | 0 | struct elf_link_hash_entry *h; |
816 | 0 | Elf_Internal_Sym *isym = NULL; |
817 | |
|
818 | 0 | r_symndx = ELF64_R_SYM (rel->r_info); |
819 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
820 | |
|
821 | 0 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
822 | 0 | { |
823 | 0 | _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx); |
824 | 0 | return false; |
825 | 0 | } |
826 | | |
827 | 0 | if (r_symndx < symtab_hdr->sh_info) |
828 | 0 | { |
829 | | /* A local symbol. */ |
830 | 0 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, r_symndx); |
831 | 0 | if (isym == NULL) |
832 | 0 | return false; |
833 | | |
834 | 0 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
835 | 0 | { |
836 | 0 | h = elf64_loongarch_get_local_sym_hash (htab, abfd, rel, true); |
837 | 0 | if (h == NULL) |
838 | 0 | return false; |
839 | | |
840 | 0 | h->type = STT_GNU_IFUNC; |
841 | 0 | h->ref_regular = 1; |
842 | 0 | } |
843 | 0 | else |
844 | 0 | h = NULL; |
845 | 0 | } |
846 | 0 | else |
847 | 0 | { |
848 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
849 | 0 | while (h->root.type == bfd_link_hash_indirect |
850 | 0 | || h->root.type == bfd_link_hash_warning) |
851 | 0 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
852 | 0 | } |
853 | | |
854 | | /* It is referenced by a non-shared object. */ |
855 | 0 | if (h != NULL) |
856 | 0 | h->ref_regular = 1; |
857 | |
|
858 | 0 | if (h && h->type == STT_GNU_IFUNC) |
859 | 0 | { |
860 | 0 | if (htab->elf.dynobj == NULL) |
861 | 0 | htab->elf.dynobj = abfd; |
862 | | |
863 | | /* Create 'irelifunc' in PIC object. */ |
864 | 0 | if (bfd_link_pic (info) |
865 | 0 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) |
866 | 0 | return false; |
867 | | /* If '.plt' not represent, create '.iplt' to deal with ifunc. */ |
868 | 0 | else if (!htab->elf.splt |
869 | 0 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) |
870 | 0 | return false; |
871 | | /* Create the ifunc sections, iplt and ipltgot, for static |
872 | | executables. */ |
873 | 0 | if ((r_type == R_LARCH_64 || r_type == R_LARCH_32) |
874 | 0 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) |
875 | 0 | return false; |
876 | | |
877 | 0 | if (h->plt.refcount < 0) |
878 | 0 | h->plt.refcount = 0; |
879 | 0 | h->plt.refcount++; |
880 | 0 | h->needs_plt = 1; |
881 | |
|
882 | 0 | elf_tdata (info->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_ifunc; |
883 | 0 | } |
884 | | |
885 | 0 | int need_dynreloc = 0; |
886 | 0 | int only_need_pcrel = 0; |
887 | | |
888 | | /* Type transitions are only possible with relocations accompanied |
889 | | by R_LARCH_RELAX. */ |
890 | 0 | if (rel + 1 != relocs + sec->reloc_count |
891 | 0 | && ELF64_R_TYPE (rel[1].r_info) == R_LARCH_RELAX) |
892 | 0 | r_type = loongarch_tls_transition (abfd, info, h, r_symndx, r_type); |
893 | 0 | switch (r_type) |
894 | 0 | { |
895 | 0 | case R_LARCH_GOT_PC_HI20: |
896 | 0 | case R_LARCH_GOT_HI20: |
897 | 0 | case R_LARCH_SOP_PUSH_GPREL: |
898 | | /* For la.global. */ |
899 | 0 | if (h) |
900 | 0 | h->pointer_equality_needed = 1; |
901 | 0 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, |
902 | 0 | r_symndx, |
903 | 0 | GOT_NORMAL)) |
904 | 0 | return false; |
905 | 0 | break; |
906 | | |
907 | 0 | case R_LARCH_TLS_LD_PC_HI20: |
908 | 0 | case R_LARCH_TLS_LD_HI20: |
909 | 0 | case R_LARCH_TLS_GD_PC_HI20: |
910 | 0 | case R_LARCH_TLS_GD_HI20: |
911 | 0 | case R_LARCH_SOP_PUSH_TLS_GD: |
912 | 0 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, |
913 | 0 | r_symndx, |
914 | 0 | GOT_TLS_GD)) |
915 | 0 | return false; |
916 | 0 | break; |
917 | | |
918 | 0 | case R_LARCH_TLS_IE_PC_HI20: |
919 | 0 | case R_LARCH_TLS_IE_HI20: |
920 | 0 | case R_LARCH_SOP_PUSH_TLS_GOT: |
921 | 0 | if (bfd_link_pic (info)) |
922 | | /* May fail for lazy-bind. */ |
923 | 0 | info->flags |= DF_STATIC_TLS; |
924 | |
|
925 | 0 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, |
926 | 0 | r_symndx, |
927 | 0 | GOT_TLS_IE)) |
928 | 0 | return false; |
929 | 0 | break; |
930 | | |
931 | 0 | case R_LARCH_TLS_LE_HI20: |
932 | 0 | case R_LARCH_TLS_LE_HI20_R: |
933 | 0 | case R_LARCH_SOP_PUSH_TLS_TPREL: |
934 | 0 | if (!bfd_link_executable (info)) |
935 | 0 | return bad_static_reloc (abfd, rel, sec, r_type, h, isym); |
936 | | |
937 | 0 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, |
938 | 0 | r_symndx, |
939 | 0 | GOT_TLS_LE)) |
940 | 0 | return false; |
941 | 0 | break; |
942 | | |
943 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
944 | 0 | case R_LARCH_TLS_DESC_HI20: |
945 | 0 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, |
946 | 0 | r_symndx, |
947 | 0 | GOT_TLS_GDESC)) |
948 | 0 | return false; |
949 | 0 | break; |
950 | | |
951 | 0 | case R_LARCH_ABS_HI20: |
952 | 0 | case R_LARCH_SOP_PUSH_ABSOLUTE: |
953 | 0 | if (bfd_link_pic (info)) |
954 | 0 | return bad_static_reloc (abfd, rel, sec, r_type, h, isym); |
955 | | |
956 | 0 | if (h != NULL) |
957 | | /* If this reloc is in a read-only section, we might |
958 | | need a copy reloc. We can't check reliably at this |
959 | | stage whether the section is read-only, as input |
960 | | sections have not yet been mapped to output sections. |
961 | | Tentatively set the flag for now, and correct in |
962 | | adjust_dynamic_symbol. */ |
963 | 0 | h->non_got_ref = 1; |
964 | 0 | break; |
965 | | |
966 | | /* For normal cmodel, pcalau12i + addi.d/w used to data. |
967 | | For first version medium cmodel, pcalau12i + jirl are used to |
968 | | function call, it need to creat PLT entry for STT_FUNC and |
969 | | STT_GNU_IFUNC type symbol. */ |
970 | 0 | case R_LARCH_PCALA_HI20: |
971 | 0 | if (h != NULL && (STT_FUNC == h->type || STT_GNU_IFUNC == h->type)) |
972 | 0 | { |
973 | | /* For pcalau12i + jirl. */ |
974 | 0 | h->needs_plt = 1; |
975 | 0 | if (h->plt.refcount < 0) |
976 | 0 | h->plt.refcount = 0; |
977 | 0 | h->plt.refcount++; |
978 | |
|
979 | 0 | h->non_got_ref = 1; |
980 | 0 | h->pointer_equality_needed = 1; |
981 | 0 | } |
982 | |
|
983 | 0 | break; |
984 | | |
985 | 0 | case R_LARCH_B16: |
986 | 0 | case R_LARCH_B21: |
987 | 0 | case R_LARCH_B26: |
988 | 0 | case R_LARCH_CALL36: |
989 | 0 | if (h != NULL) |
990 | 0 | { |
991 | 0 | h->needs_plt = 1; |
992 | 0 | if (!bfd_link_pic (info)) |
993 | 0 | h->non_got_ref = 1; |
994 | | |
995 | | /* We try to create PLT stub for all non-local function. */ |
996 | 0 | if (h->plt.refcount < 0) |
997 | 0 | h->plt.refcount = 0; |
998 | 0 | h->plt.refcount++; |
999 | 0 | } |
1000 | |
|
1001 | 0 | break; |
1002 | | |
1003 | 0 | case R_LARCH_SOP_PUSH_PCREL: |
1004 | 0 | if (h != NULL) |
1005 | 0 | { |
1006 | 0 | if (!bfd_link_pic (info)) |
1007 | 0 | h->non_got_ref = 1; |
1008 | | |
1009 | | /* We try to create PLT stub for all non-local function. */ |
1010 | 0 | if (h->plt.refcount < 0) |
1011 | 0 | h->plt.refcount = 0; |
1012 | 0 | h->plt.refcount++; |
1013 | 0 | h->pointer_equality_needed = 1; |
1014 | 0 | } |
1015 | |
|
1016 | 0 | break; |
1017 | | |
1018 | 0 | case R_LARCH_SOP_PUSH_PLT_PCREL: |
1019 | | /* This symbol requires a procedure linkage table entry. We |
1020 | | actually build the entry in adjust_dynamic_symbol, |
1021 | | because this might be a case of linking PIC code without |
1022 | | linking in any dynamic objects, in which case we don't |
1023 | | need to generate a procedure linkage table after all. */ |
1024 | 0 | if (h != NULL) |
1025 | 0 | { |
1026 | 0 | h->needs_plt = 1; |
1027 | 0 | if (h->plt.refcount < 0) |
1028 | 0 | h->plt.refcount = 0; |
1029 | 0 | h->plt.refcount++; |
1030 | 0 | } |
1031 | 0 | break; |
1032 | | |
1033 | 0 | case R_LARCH_TLS_DTPREL32: |
1034 | 0 | case R_LARCH_TLS_DTPREL64: |
1035 | 0 | need_dynreloc = 1; |
1036 | 0 | only_need_pcrel = 1; |
1037 | 0 | break; |
1038 | | |
1039 | 0 | case R_LARCH_JUMP_SLOT: |
1040 | 0 | case R_LARCH_32: |
1041 | 0 | case R_LARCH_64: |
1042 | |
|
1043 | 0 | need_dynreloc = 1; |
1044 | | |
1045 | | /* If resolved symbol is defined in this object, |
1046 | | 1. Under pie, the symbol is known. We convert it |
1047 | | into R_LARCH_RELATIVE and need load-addr still. |
1048 | | 2. Under pde, the symbol is known and we can discard R_LARCH_64. |
1049 | | 3. Under dll, R_LARCH_64 can't be changed normally, since |
1050 | | its defination could be covered by the one in executable. |
1051 | | For symbolic, we convert it into R_LARCH_RELATIVE. |
1052 | | Thus, only under pde, it needs pcrel only. We discard it. */ |
1053 | 0 | only_need_pcrel = bfd_link_pde (info); |
1054 | |
|
1055 | 0 | if (h != NULL |
1056 | 0 | && (!bfd_link_pic (info) |
1057 | 0 | || h->type == STT_GNU_IFUNC)) |
1058 | 0 | { |
1059 | | /* This reloc might not bind locally. */ |
1060 | 0 | h->non_got_ref = 1; |
1061 | 0 | h->pointer_equality_needed = 1; |
1062 | |
|
1063 | 0 | if (!h->def_regular |
1064 | 0 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) |
1065 | 0 | { |
1066 | | /* We may need a .plt entry if the symbol is a function |
1067 | | defined in a shared lib or is a function referenced |
1068 | | from the code or read-only section. */ |
1069 | 0 | h->plt.refcount += 1; |
1070 | 0 | } |
1071 | 0 | } |
1072 | 0 | break; |
1073 | | |
1074 | 0 | case R_LARCH_GNU_VTINHERIT: |
1075 | 0 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
1076 | 0 | return false; |
1077 | 0 | break; |
1078 | | |
1079 | 0 | case R_LARCH_GNU_VTENTRY: |
1080 | 0 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
1081 | 0 | return false; |
1082 | 0 | break; |
1083 | | |
1084 | 0 | default: |
1085 | 0 | break; |
1086 | 0 | } |
1087 | | |
1088 | | /* Record some info for sizing and allocating dynamic entry. */ |
1089 | 0 | if (need_dynreloc && (sec->flags & SEC_ALLOC)) |
1090 | 0 | { |
1091 | | /* When creating a shared object, we must copy these |
1092 | | relocs into the output file. We create a reloc |
1093 | | section in dynobj and make room for the reloc. */ |
1094 | 0 | struct elf_dyn_relocs *p; |
1095 | 0 | struct elf_dyn_relocs **head; |
1096 | |
|
1097 | 0 | if (sreloc == NULL) |
1098 | 0 | { |
1099 | 0 | sreloc |
1100 | 0 | = _bfd_elf_make_dynamic_reloc_section (sec, htab->elf.dynobj, |
1101 | 0 | LARCH_ELF_LOG_WORD_BYTES, |
1102 | 0 | abfd, /*rela?*/ true); |
1103 | 0 | if (sreloc == NULL) |
1104 | 0 | return false; |
1105 | 0 | } |
1106 | | |
1107 | | /* If this is a global symbol, we count the number of |
1108 | | relocations we need for this symbol. */ |
1109 | 0 | if (h != NULL) |
1110 | 0 | head = &h->dyn_relocs; |
1111 | 0 | else |
1112 | 0 | { |
1113 | | /* Track dynamic relocs needed for local syms too. |
1114 | | We really need local syms available to do this |
1115 | | easily. Oh well. */ |
1116 | |
|
1117 | 0 | asection *s; |
1118 | 0 | void *vpp; |
1119 | |
|
1120 | 0 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); |
1121 | 0 | if (s == NULL) |
1122 | 0 | s = sec; |
1123 | |
|
1124 | 0 | vpp = &elf_section_data (s)->local_dynrel; |
1125 | 0 | head = (struct elf_dyn_relocs **) vpp; |
1126 | 0 | } |
1127 | |
|
1128 | 0 | p = *head; |
1129 | 0 | if (p == NULL || p->sec != sec) |
1130 | 0 | { |
1131 | 0 | bfd_size_type amt = sizeof *p; |
1132 | 0 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, amt); |
1133 | 0 | if (p == NULL) |
1134 | 0 | return false; |
1135 | 0 | p->next = *head; |
1136 | 0 | *head = p; |
1137 | 0 | p->sec = sec; |
1138 | 0 | p->count = 0; |
1139 | 0 | p->pc_count = 0; |
1140 | 0 | } |
1141 | | |
1142 | 0 | p->count++; |
1143 | 0 | p->pc_count += only_need_pcrel; |
1144 | 0 | } |
1145 | 0 | } |
1146 | | |
1147 | 0 | return true; |
1148 | 0 | } |
1149 | | |
1150 | | /* Find dynamic relocs for H that apply to read-only sections. */ |
1151 | | |
1152 | | static asection * |
1153 | | readonly_dynrelocs (struct elf_link_hash_entry *h) |
1154 | 0 | { |
1155 | 0 | struct elf_dyn_relocs *p; |
1156 | |
|
1157 | 0 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
1158 | 0 | { |
1159 | 0 | asection *s = p->sec->output_section; |
1160 | |
|
1161 | 0 | if (s != NULL && (s->flags & SEC_READONLY) != 0) |
1162 | 0 | return p->sec; |
1163 | 0 | } |
1164 | 0 | return NULL; |
1165 | 0 | } |
1166 | | |
1167 | | /* Adjust a symbol defined by a dynamic object and referenced by a |
1168 | | regular object. The current definition is in some section of the |
1169 | | dynamic object, but we're not including those sections. We have to |
1170 | | change the definition to something the rest of the link can |
1171 | | understand. */ |
1172 | | static bool |
1173 | | loongarch_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
1174 | | struct elf_link_hash_entry *h) |
1175 | 0 | { |
1176 | 0 | struct loongarch_elf_link_hash_table *htab; |
1177 | 0 | bfd *dynobj; |
1178 | |
|
1179 | 0 | htab = loongarch_elf_hash_table (info); |
1180 | 0 | BFD_ASSERT (htab != NULL); |
1181 | |
|
1182 | 0 | dynobj = htab->elf.dynobj; |
1183 | | |
1184 | | /* Make sure we know what is going on here. */ |
1185 | 0 | BFD_ASSERT (dynobj != NULL |
1186 | 0 | && (h->needs_plt |
1187 | 0 | || h->type == STT_GNU_IFUNC |
1188 | 0 | || h->is_weakalias |
1189 | 0 | || (h->def_dynamic |
1190 | 0 | && h->ref_regular |
1191 | 0 | && !h->def_regular))); |
1192 | | |
1193 | | /* If this is a function, put it in the procedure linkage table. We |
1194 | | will fill in the contents of the procedure linkage table later |
1195 | | (although we could actually do it here). */ |
1196 | 0 | if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) |
1197 | 0 | { |
1198 | 0 | if (h->plt.refcount <= 0 |
1199 | 0 | || (h->type != STT_GNU_IFUNC |
1200 | 0 | && (SYMBOL_REFERENCES_LOCAL (info, h) |
1201 | 0 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
1202 | 0 | && h->root.type == bfd_link_hash_undefweak)))) |
1203 | 0 | { |
1204 | | /* This case can occur if we saw a R_LARCH_SOP_PUSH_PLT_PCREL reloc |
1205 | | in an input file, but the symbol was never referred to by a |
1206 | | dynamic object, or if all references were garbage collected. |
1207 | | In such a case, we don't actually need to build a PLT entry. */ |
1208 | 0 | h->plt.offset = MINUS_ONE; |
1209 | 0 | h->needs_plt = 0; |
1210 | 0 | } |
1211 | |
|
1212 | 0 | return true; |
1213 | 0 | } |
1214 | 0 | else |
1215 | 0 | h->plt.offset = MINUS_ONE; |
1216 | | |
1217 | | /* If this is a weak symbol, and there is a real definition, the |
1218 | | processor independent code will have arranged for us to see the |
1219 | | real definition first, and we can just use the same value. */ |
1220 | 0 | if (h->is_weakalias) |
1221 | 0 | { |
1222 | 0 | struct elf_link_hash_entry *def = weakdef (h); |
1223 | 0 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
1224 | 0 | h->root.u.def.section = def->root.u.def.section; |
1225 | 0 | h->root.u.def.value = def->root.u.def.value; |
1226 | 0 | return true; |
1227 | 0 | } |
1228 | | |
1229 | | /* R_LARCH_COPY is not adept glibc, not to generate. */ |
1230 | | /* Can not print anything, because make check ld. */ |
1231 | 0 | return true; |
1232 | 0 | } |
1233 | | |
1234 | | /* Allocate space in .plt, .got and associated reloc sections for |
1235 | | dynamic relocs. */ |
1236 | | |
1237 | | static bool |
1238 | | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
1239 | 0 | { |
1240 | 0 | struct bfd_link_info *info; |
1241 | 0 | struct loongarch_elf_link_hash_table *htab; |
1242 | 0 | struct elf_dyn_relocs *p; |
1243 | |
|
1244 | 0 | if (h->root.type == bfd_link_hash_indirect) |
1245 | 0 | return true; |
1246 | | |
1247 | 0 | if (h->type == STT_GNU_IFUNC |
1248 | 0 | && h->def_regular) |
1249 | 0 | return true; |
1250 | | |
1251 | 0 | info = (struct bfd_link_info *) inf; |
1252 | 0 | htab = loongarch_elf_hash_table (info); |
1253 | 0 | bool dyn = htab->elf.dynamic_sections_created; |
1254 | 0 | BFD_ASSERT (htab != NULL); |
1255 | |
|
1256 | 0 | do |
1257 | 0 | { |
1258 | 0 | asection *plt, *gotplt, *relplt; |
1259 | |
|
1260 | 0 | if (!h->needs_plt) |
1261 | 0 | break; |
1262 | | |
1263 | 0 | h->needs_plt = 0; |
1264 | |
|
1265 | 0 | if (htab->elf.splt) |
1266 | 0 | { |
1267 | 0 | if (h->dynindx == -1 && !h->forced_local && dyn |
1268 | 0 | && h->root.type == bfd_link_hash_undefweak) |
1269 | 0 | { |
1270 | 0 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
1271 | 0 | return false; |
1272 | 0 | } |
1273 | | |
1274 | 0 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h) |
1275 | 0 | && h->type != STT_GNU_IFUNC) |
1276 | 0 | break; |
1277 | | |
1278 | 0 | plt = htab->elf.splt; |
1279 | 0 | gotplt = htab->elf.sgotplt; |
1280 | 0 | relplt = htab->elf.srelplt; |
1281 | 0 | } |
1282 | 0 | else if (htab->elf.iplt) |
1283 | 0 | { |
1284 | | /* .iplt only for IFUNC. */ |
1285 | 0 | if (h->type != STT_GNU_IFUNC) |
1286 | 0 | break; |
1287 | | |
1288 | 0 | plt = htab->elf.iplt; |
1289 | 0 | gotplt = htab->elf.igotplt; |
1290 | 0 | relplt = htab->elf.irelplt; |
1291 | 0 | } |
1292 | 0 | else |
1293 | 0 | break; |
1294 | | |
1295 | 0 | if (plt->size == 0) |
1296 | 0 | plt->size = PLT_HEADER_SIZE; |
1297 | |
|
1298 | 0 | h->plt.offset = plt->size; |
1299 | 0 | plt->size += PLT_ENTRY_SIZE; |
1300 | 0 | gotplt->size += GOT_ENTRY_SIZE; |
1301 | 0 | relplt->size += sizeof (Elf64_External_Rela); |
1302 | | |
1303 | | /* If this symbol is not defined in a regular file, and we are |
1304 | | not generating a shared library, then set the symbol to this |
1305 | | location in the .plt. This is required to make function |
1306 | | pointers compare as equal between the normal executable and |
1307 | | the shared library. */ |
1308 | 0 | if (!bfd_link_pic (info) |
1309 | 0 | && !h->def_regular) |
1310 | 0 | { |
1311 | 0 | h->root.u.def.section = plt; |
1312 | 0 | h->root.u.def.value = h->plt.offset; |
1313 | 0 | } |
1314 | |
|
1315 | 0 | h->needs_plt = 1; |
1316 | 0 | } |
1317 | 0 | while (0); |
1318 | | |
1319 | 0 | if (!h->needs_plt) |
1320 | 0 | h->plt.offset = MINUS_ONE; |
1321 | |
|
1322 | 0 | if (0 < h->got.refcount) |
1323 | 0 | { |
1324 | 0 | asection *s; |
1325 | 0 | int tls_type = loongarch_elf_hash_entry (h)->tls_type; |
1326 | | |
1327 | | /* Make sure this symbol is output as a dynamic symbol. |
1328 | | Undefined weak syms won't yet be marked as dynamic. */ |
1329 | 0 | if (h->dynindx == -1 && !h->forced_local && dyn |
1330 | 0 | && h->root.type == bfd_link_hash_undefweak) |
1331 | 0 | { |
1332 | 0 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
1333 | 0 | return false; |
1334 | 0 | } |
1335 | | |
1336 | 0 | s = htab->elf.sgot; |
1337 | 0 | h->got.offset = s->size; |
1338 | 0 | if (tls_type & (GOT_TLS_GD | GOT_TLS_IE | GOT_TLS_GDESC)) |
1339 | 0 | { |
1340 | 0 | int indx = 0; |
1341 | 0 | bool need_reloc = false; |
1342 | 0 | LARCH_TLS_GD_IE_NEED_DYN_RELOC (info, dyn, h, indx, |
1343 | 0 | need_reloc); |
1344 | | /* TLS_GD needs two dynamic relocs and two GOT slots. */ |
1345 | 0 | if (tls_type & GOT_TLS_GD) |
1346 | 0 | { |
1347 | 0 | s->size += 2 * GOT_ENTRY_SIZE; |
1348 | 0 | if (need_reloc) |
1349 | 0 | htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); |
1350 | 0 | } |
1351 | | |
1352 | | /* TLS_IE needs one dynamic reloc and one GOT slot. */ |
1353 | 0 | if (tls_type & GOT_TLS_IE) |
1354 | 0 | { |
1355 | 0 | s->size += GOT_ENTRY_SIZE; |
1356 | 0 | if (need_reloc) |
1357 | 0 | htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela); |
1358 | 0 | } |
1359 | | |
1360 | | /* TLS_DESC needs one dynamic reloc and two GOT slot. */ |
1361 | 0 | if (tls_type & GOT_TLS_GDESC) |
1362 | 0 | { |
1363 | 0 | s->size += GOT_ENTRY_SIZE * 2; |
1364 | 0 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
1365 | 0 | } |
1366 | 0 | } |
1367 | | |
1368 | 0 | else |
1369 | 0 | { |
1370 | 0 | s->size += GOT_ENTRY_SIZE; |
1371 | 0 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1372 | 0 | || h->root.type != bfd_link_hash_undefweak) |
1373 | 0 | && (bfd_link_pic (info) |
1374 | 0 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), |
1375 | 0 | h)) |
1376 | 0 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
1377 | | /* Undefined weak symbol in static PIE resolves to 0 without |
1378 | | any dynamic relocations. */ |
1379 | 0 | htab->elf.srelgot->size += sizeof (Elf64_External_Rela); |
1380 | 0 | } |
1381 | 0 | } |
1382 | 0 | else |
1383 | 0 | h->got.offset = MINUS_ONE; |
1384 | | |
1385 | 0 | if (h->dyn_relocs == NULL) |
1386 | 0 | return true; |
1387 | | |
1388 | | /* Extra dynamic relocate, |
1389 | | * R_LARCH_64 |
1390 | | * R_LARCH_TLS_DTPREL64 |
1391 | | * R_LARCH_JUMP_SLOT |
1392 | | * R_LARCH_64. */ |
1393 | | |
1394 | 0 | if (SYMBOL_CALLS_LOCAL (info, h)) |
1395 | 0 | { |
1396 | 0 | struct elf_dyn_relocs **pp; |
1397 | |
|
1398 | 0 | for (pp = &h->dyn_relocs; (p = *pp) != NULL;) |
1399 | 0 | { |
1400 | 0 | p->count -= p->pc_count; |
1401 | 0 | p->pc_count = 0; |
1402 | 0 | if (p->count == 0) |
1403 | 0 | *pp = p->next; |
1404 | 0 | else |
1405 | 0 | pp = &p->next; |
1406 | 0 | } |
1407 | 0 | } |
1408 | |
|
1409 | 0 | if (h->root.type == bfd_link_hash_undefweak) |
1410 | 0 | { |
1411 | 0 | if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) |
1412 | 0 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
1413 | 0 | || (!bfd_link_pic (info) && h->non_got_ref)) |
1414 | 0 | h->dyn_relocs = NULL; |
1415 | 0 | else if (h->dynindx == -1 && !h->forced_local) |
1416 | 0 | { |
1417 | | /* Make sure this symbol is output as a dynamic symbol. |
1418 | | Undefined weak syms won't yet be marked as dynamic. */ |
1419 | 0 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
1420 | 0 | return false; |
1421 | | |
1422 | 0 | if (h->dynindx == -1) |
1423 | 0 | h->dyn_relocs = NULL; |
1424 | 0 | } |
1425 | 0 | } |
1426 | | |
1427 | 0 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
1428 | 0 | { |
1429 | 0 | if (discarded_section (p->sec)) |
1430 | 0 | continue; |
1431 | 0 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
1432 | 0 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
1433 | 0 | } |
1434 | |
|
1435 | 0 | return true; |
1436 | 0 | } |
1437 | | |
1438 | | /* A modified version of _bfd_elf_allocate_ifunc_dyn_relocs. |
1439 | | For local def and ref ifunc, |
1440 | | dynamic relocations are stored in |
1441 | | 1. rela.srelgot section in dynamic object (dll or exec). |
1442 | | 2. rela.irelplt section in static executable. |
1443 | | Unlike _bfd_elf_allocate_ifunc_dyn_relocs, rela.srelgot is used |
1444 | | instead of rela.srelplt. Glibc ELF loader will not support |
1445 | | R_LARCH_IRELATIVE relocation in rela.plt. */ |
1446 | | |
1447 | | static bool |
1448 | | local_allocate_ifunc_dyn_relocs (struct bfd_link_info *info, |
1449 | | struct elf_link_hash_entry *h, |
1450 | | struct elf_dyn_relocs **head, |
1451 | | unsigned int plt_entry_size, |
1452 | | unsigned int plt_header_size, |
1453 | | unsigned int got_entry_size, |
1454 | | bool avoid_plt) |
1455 | 0 | { |
1456 | 0 | asection *plt, *gotplt, *relplt; |
1457 | 0 | struct elf_dyn_relocs *p; |
1458 | 0 | unsigned int sizeof_reloc; |
1459 | 0 | const struct elf_backend_data *bed; |
1460 | 0 | struct elf_link_hash_table *htab; |
1461 | | /* If AVOID_PLT is TRUE, don't use PLT if possible. */ |
1462 | 0 | bool use_plt = !avoid_plt || h->plt.refcount > 0; |
1463 | 0 | bool need_dynreloc = !use_plt || bfd_link_pic (info); |
1464 | | |
1465 | | /* When a PIC object references a STT_GNU_IFUNC symbol defined |
1466 | | in executable or it isn't referenced via PLT, the address of |
1467 | | the resolved function may be used. But in non-PIC executable, |
1468 | | the address of its plt slot may be used. Pointer equality may |
1469 | | not work correctly. PIE or non-PLT reference should be used if |
1470 | | pointer equality is required here. |
1471 | | |
1472 | | If STT_GNU_IFUNC symbol is defined in position-dependent executable, |
1473 | | backend should change it to the normal function and set its address |
1474 | | to its PLT entry which should be resolved by R_*_IRELATIVE at |
1475 | | run-time. All external references should be resolved to its PLT in |
1476 | | executable. */ |
1477 | 0 | if (!need_dynreloc |
1478 | 0 | && !(bfd_link_pde (info) && h->def_regular) |
1479 | 0 | && (h->dynindx != -1 |
1480 | 0 | || info->export_dynamic) |
1481 | 0 | && h->pointer_equality_needed) |
1482 | 0 | { |
1483 | 0 | info->callbacks->einfo |
1484 | | /* xgettext:c-format. */ |
1485 | 0 | (_("%F%P: dynamic STT_GNU_IFUNC symbol `%s' with pointer " |
1486 | 0 | "equality in `%pB' can not be used when making an " |
1487 | 0 | "executable; recompile with -fPIE and relink with -pie\n"), |
1488 | 0 | h->root.root.string, |
1489 | 0 | h->root.u.def.section->owner); |
1490 | 0 | bfd_set_error (bfd_error_bad_value); |
1491 | 0 | return false; |
1492 | 0 | } |
1493 | | |
1494 | 0 | htab = elf_hash_table (info); |
1495 | | |
1496 | | /* When the symbol is marked with regular reference, if PLT isn't used |
1497 | | or we are building a PIC object, we must keep dynamic relocation |
1498 | | if there is non-GOT reference and use PLT if there is PC-relative |
1499 | | reference. */ |
1500 | 0 | if (need_dynreloc && h->ref_regular) |
1501 | 0 | { |
1502 | 0 | bool keep = false; |
1503 | 0 | for (p = *head; p != NULL; p = p->next) |
1504 | 0 | if (p->count) |
1505 | 0 | { |
1506 | 0 | h->non_got_ref = 1; |
1507 | | /* Need dynamic relocations for non-GOT reference. */ |
1508 | 0 | keep = true; |
1509 | 0 | if (p->pc_count) |
1510 | 0 | { |
1511 | | /* Must use PLT for PC-relative reference. */ |
1512 | 0 | use_plt = true; |
1513 | 0 | need_dynreloc = bfd_link_pic (info); |
1514 | 0 | break; |
1515 | 0 | } |
1516 | 0 | } |
1517 | 0 | if (keep) |
1518 | 0 | goto keep; |
1519 | 0 | } |
1520 | | |
1521 | | /* Support garbage collection against STT_GNU_IFUNC symbols. */ |
1522 | 0 | if (h->plt.refcount <= 0 && h->got.refcount <= 0) |
1523 | 0 | { |
1524 | 0 | h->got = htab->init_got_offset; |
1525 | 0 | h->plt = htab->init_plt_offset; |
1526 | 0 | *head = NULL; |
1527 | 0 | return true; |
1528 | 0 | } |
1529 | | |
1530 | | /* Return and discard space for dynamic relocations against it if |
1531 | | it is never referenced. */ |
1532 | 0 | if (!h->ref_regular) |
1533 | 0 | { |
1534 | 0 | if (h->plt.refcount > 0 |
1535 | 0 | || h->got.refcount > 0) |
1536 | 0 | abort (); |
1537 | 0 | h->got = htab->init_got_offset; |
1538 | 0 | h->plt = htab->init_plt_offset; |
1539 | 0 | *head = NULL; |
1540 | 0 | return true; |
1541 | 0 | } |
1542 | | |
1543 | 0 | keep: |
1544 | 0 | bed = get_elf_backend_data (info->output_bfd); |
1545 | 0 | if (bed->rela_plts_and_copies_p) |
1546 | 0 | sizeof_reloc = bed->s->sizeof_rela; |
1547 | 0 | else |
1548 | 0 | sizeof_reloc = bed->s->sizeof_rel; |
1549 | | |
1550 | | /* When building a static executable, use iplt, igot.plt and |
1551 | | rela.iplt sections for STT_GNU_IFUNC symbols. */ |
1552 | 0 | if (htab->splt != NULL) |
1553 | 0 | { |
1554 | 0 | plt = htab->splt; |
1555 | 0 | gotplt = htab->sgotplt; |
1556 | | /* Change dynamic info of ifunc gotplt from srelplt to srelgot. */ |
1557 | 0 | relplt = htab->srelgot; |
1558 | | |
1559 | | /* If this is the first plt entry and PLT is used, make room for |
1560 | | the special first entry. */ |
1561 | 0 | if (plt->size == 0 && use_plt) |
1562 | 0 | plt->size += plt_header_size; |
1563 | 0 | } |
1564 | 0 | else |
1565 | 0 | { |
1566 | 0 | plt = htab->iplt; |
1567 | 0 | gotplt = htab->igotplt; |
1568 | 0 | relplt = htab->irelplt; |
1569 | 0 | } |
1570 | |
|
1571 | 0 | if (use_plt) |
1572 | 0 | { |
1573 | | /* Don't update value of STT_GNU_IFUNC symbol to PLT. We need |
1574 | | the original value for R_*_IRELATIVE. */ |
1575 | 0 | h->plt.offset = plt->size; |
1576 | | |
1577 | | /* Make room for this entry in the plt/iplt section. */ |
1578 | 0 | plt->size += plt_entry_size; |
1579 | | |
1580 | | /* We also need to make an entry in the got.plt/got.iplt section, |
1581 | | which will be placed in the got section by the linker script. */ |
1582 | 0 | gotplt->size += got_entry_size; |
1583 | 0 | } |
1584 | | |
1585 | | /* We also need to make an entry in the rela.plt/.rela.iplt |
1586 | | section for GOTPLT relocation if PLT is used. */ |
1587 | 0 | if (use_plt) |
1588 | 0 | { |
1589 | 0 | relplt->size += sizeof_reloc; |
1590 | 0 | relplt->reloc_count++; |
1591 | 0 | } |
1592 | | |
1593 | | /* We need dynamic relocation for STT_GNU_IFUNC symbol only when |
1594 | | there is a non-GOT reference in a PIC object or PLT isn't used. */ |
1595 | 0 | if (!need_dynreloc || !h->non_got_ref) |
1596 | 0 | *head = NULL; |
1597 | | |
1598 | | /* Finally, allocate space. */ |
1599 | 0 | p = *head; |
1600 | 0 | if (p != NULL) |
1601 | 0 | { |
1602 | 0 | bfd_size_type count = 0; |
1603 | 0 | do |
1604 | 0 | { |
1605 | 0 | count += p->count; |
1606 | 0 | p = p->next; |
1607 | 0 | } |
1608 | 0 | while (p != NULL); |
1609 | |
|
1610 | 0 | htab->ifunc_resolvers = count != 0; |
1611 | | |
1612 | | /* Dynamic relocations are stored in |
1613 | | 1. rela.srelgot section in PIC object. |
1614 | | 2. rela.srelgot section in dynamic executable. |
1615 | | 3. rela.irelplt section in static executable. */ |
1616 | 0 | if (htab->splt != NULL) |
1617 | 0 | htab->srelgot->size += count * sizeof_reloc; |
1618 | 0 | else |
1619 | 0 | { |
1620 | 0 | relplt->size += count * sizeof_reloc; |
1621 | 0 | relplt->reloc_count += count; |
1622 | 0 | } |
1623 | 0 | } |
1624 | | |
1625 | | /* For STT_GNU_IFUNC symbol, got.plt has the real function address |
1626 | | and got has the PLT entry adddress. We will load the GOT entry |
1627 | | with the PLT entry in finish_dynamic_symbol if it is used. For |
1628 | | branch, it uses got.plt. For symbol value, if PLT is used, |
1629 | | 1. Use got.plt in a PIC object if it is forced local or not |
1630 | | dynamic. |
1631 | | 2. Use got.plt in a non-PIC object if pointer equality isn't |
1632 | | needed. |
1633 | | 3. Use got.plt in PIE. |
1634 | | 4. Use got.plt if got isn't used. |
1635 | | 5. Otherwise use got so that it can be shared among different |
1636 | | objects at run-time. |
1637 | | If PLT isn't used, always use got for symbol value. |
1638 | | We only need to relocate got entry in PIC object or in dynamic |
1639 | | executable without PLT. */ |
1640 | 0 | if (use_plt |
1641 | 0 | && (h->got.refcount <= 0 |
1642 | 0 | || (bfd_link_pic (info) |
1643 | 0 | && (h->dynindx == -1 |
1644 | 0 | || h->forced_local)) |
1645 | 0 | || ( |
1646 | 0 | !h->pointer_equality_needed) |
1647 | 0 | || htab->sgot == NULL)) |
1648 | 0 | { |
1649 | | /* Use got.plt. */ |
1650 | 0 | h->got.offset = (bfd_vma) -1; |
1651 | 0 | } |
1652 | 0 | else |
1653 | 0 | { |
1654 | 0 | if (!use_plt) |
1655 | 0 | { |
1656 | | /* PLT isn't used. */ |
1657 | 0 | h->plt.offset = (bfd_vma) -1; |
1658 | 0 | } |
1659 | 0 | if (h->got.refcount <= 0) |
1660 | 0 | { |
1661 | | /* GOT isn't need when there are only relocations for static |
1662 | | pointers. */ |
1663 | 0 | h->got.offset = (bfd_vma) -1; |
1664 | 0 | } |
1665 | 0 | else |
1666 | 0 | { |
1667 | 0 | h->got.offset = htab->sgot->size; |
1668 | 0 | htab->sgot->size += got_entry_size; |
1669 | | /* Need to relocate the GOT entry in a PIC object or PLT isn't |
1670 | | used. Otherwise, the GOT entry will be filled with the PLT |
1671 | | entry and dynamic GOT relocation isn't needed. */ |
1672 | 0 | if (need_dynreloc) |
1673 | 0 | { |
1674 | | /* For non-static executable, dynamic GOT relocation is in |
1675 | | rela.got section, but for static executable, it is |
1676 | | in rela.iplt section. */ |
1677 | 0 | if (htab->splt != NULL) |
1678 | 0 | htab->srelgot->size += sizeof_reloc; |
1679 | 0 | else |
1680 | 0 | { |
1681 | 0 | relplt->size += sizeof_reloc; |
1682 | 0 | relplt->reloc_count++; |
1683 | 0 | } |
1684 | 0 | } |
1685 | 0 | } |
1686 | 0 | } |
1687 | |
|
1688 | 0 | return true; |
1689 | 0 | } |
1690 | | |
1691 | | /* Allocate space in .plt, .got and associated reloc sections for |
1692 | | ifunc dynamic relocs. */ |
1693 | | |
1694 | | static bool |
1695 | | elf64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
1696 | 0 | { |
1697 | 0 | struct bfd_link_info *info; |
1698 | | /* An example of a bfd_link_hash_indirect symbol is versioned |
1699 | | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) |
1700 | | -> __gxx_personality_v0(bfd_link_hash_defined) |
1701 | | |
1702 | | There is no need to process bfd_link_hash_indirect symbols here |
1703 | | because we will also be presented with the concrete instance of |
1704 | | the symbol and loongarch_elf_copy_indirect_symbol () will have been |
1705 | | called to copy all relevant data from the generic to the concrete |
1706 | | symbol instance. */ |
1707 | 0 | if (h->root.type == bfd_link_hash_indirect) |
1708 | 0 | return true; |
1709 | | |
1710 | 0 | if (h->root.type == bfd_link_hash_warning) |
1711 | 0 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1712 | |
|
1713 | 0 | info = (struct bfd_link_info *) inf; |
1714 | | |
1715 | | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
1716 | | here if it is defined and referenced in a non-shared object. */ |
1717 | 0 | if (h->type == STT_GNU_IFUNC && h->def_regular) |
1718 | 0 | { |
1719 | 0 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
1720 | 0 | return local_allocate_ifunc_dyn_relocs (info, h, |
1721 | 0 | &h->dyn_relocs, |
1722 | 0 | PLT_ENTRY_SIZE, |
1723 | 0 | PLT_HEADER_SIZE, |
1724 | 0 | GOT_ENTRY_SIZE, |
1725 | 0 | false); |
1726 | 0 | else |
1727 | 0 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
1728 | 0 | &h->dyn_relocs, |
1729 | 0 | PLT_ENTRY_SIZE, |
1730 | 0 | PLT_HEADER_SIZE, |
1731 | 0 | GOT_ENTRY_SIZE, |
1732 | 0 | false); |
1733 | 0 | } |
1734 | | |
1735 | 0 | return true; |
1736 | 0 | } |
1737 | | |
1738 | | /* Allocate space in .plt, .got and associated reloc sections for |
1739 | | ifunc dynamic relocs. */ |
1740 | | |
1741 | | static int |
1742 | | elf64_allocate_local_ifunc_dynrelocs (void **slot, void *inf) |
1743 | 0 | { |
1744 | 0 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) *slot; |
1745 | |
|
1746 | 0 | if (h->type != STT_GNU_IFUNC |
1747 | 0 | || !h->def_regular |
1748 | 0 | || !h->ref_regular |
1749 | 0 | || !h->forced_local |
1750 | 0 | || h->root.type != bfd_link_hash_defined) |
1751 | 0 | abort (); |
1752 | | |
1753 | 0 | return elf64_allocate_ifunc_dynrelocs (h, inf); |
1754 | 0 | } |
1755 | | |
1756 | | /* Set DF_TEXTREL if we find any dynamic relocs that apply to |
1757 | | read-only sections. */ |
1758 | | |
1759 | | static bool |
1760 | | maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) |
1761 | 0 | { |
1762 | 0 | asection *sec; |
1763 | |
|
1764 | 0 | if (h->root.type == bfd_link_hash_indirect) |
1765 | 0 | return true; |
1766 | | |
1767 | 0 | sec = readonly_dynrelocs (h); |
1768 | 0 | if (sec != NULL) |
1769 | 0 | { |
1770 | 0 | struct bfd_link_info *info = (struct bfd_link_info *) info_p; |
1771 | |
|
1772 | 0 | info->flags |= DF_TEXTREL; |
1773 | 0 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' in " |
1774 | 0 | "read-only section `%pA'\n"), |
1775 | 0 | sec->owner, h->root.root.string, sec); |
1776 | | |
1777 | | /* Not an error, just cut short the traversal. */ |
1778 | 0 | return false; |
1779 | 0 | } |
1780 | 0 | return true; |
1781 | 0 | } |
1782 | | |
1783 | | static bool |
1784 | | loongarch_elf_late_size_sections (bfd *output_bfd, |
1785 | | struct bfd_link_info *info) |
1786 | 0 | { |
1787 | 0 | struct loongarch_elf_link_hash_table *htab; |
1788 | 0 | bfd *dynobj; |
1789 | 0 | asection *s; |
1790 | 0 | bfd *ibfd; |
1791 | |
|
1792 | 0 | htab = loongarch_elf_hash_table (info); |
1793 | 0 | BFD_ASSERT (htab != NULL); |
1794 | 0 | dynobj = htab->elf.dynobj; |
1795 | 0 | if (dynobj == NULL) |
1796 | 0 | return true; |
1797 | | |
1798 | 0 | if (htab->elf.dynamic_sections_created) |
1799 | 0 | { |
1800 | | /* Set the contents of the .interp section to the interpreter. */ |
1801 | 0 | if (bfd_link_executable (info) && !info->nointerp) |
1802 | 0 | { |
1803 | 0 | const char *interpreter; |
1804 | 0 | s = bfd_get_linker_section (dynobj, ".interp"); |
1805 | 0 | BFD_ASSERT (s != NULL); |
1806 | |
|
1807 | 0 | if (elf_elfheader (output_bfd)->e_ident[EI_CLASS] == ELFCLASS32) |
1808 | 0 | interpreter = "/lib32/ld.so.1"; |
1809 | 0 | else if (elf_elfheader (output_bfd)->e_ident[EI_CLASS] == ELFCLASS64) |
1810 | 0 | interpreter = "/lib64/ld.so.1"; |
1811 | 0 | else |
1812 | 0 | interpreter = "/lib/ld.so.1"; |
1813 | |
|
1814 | 0 | s->contents = (unsigned char *) interpreter; |
1815 | 0 | s->size = strlen (interpreter) + 1; |
1816 | 0 | } |
1817 | 0 | } |
1818 | | |
1819 | | /* Set up .got offsets for local syms, and space for local dynamic |
1820 | | relocs. */ |
1821 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
1822 | 0 | { |
1823 | 0 | bfd_signed_vma *local_got; |
1824 | 0 | bfd_signed_vma *end_local_got; |
1825 | 0 | char *local_tls_type; |
1826 | 0 | bfd_size_type locsymcount; |
1827 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1828 | 0 | asection *srel; |
1829 | |
|
1830 | 0 | if (!is_loongarch_elf (ibfd)) |
1831 | 0 | continue; |
1832 | | |
1833 | 0 | for (s = ibfd->sections; s != NULL; s = s->next) |
1834 | 0 | { |
1835 | 0 | struct elf_dyn_relocs *p; |
1836 | |
|
1837 | 0 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) |
1838 | 0 | { |
1839 | 0 | p->count -= p->pc_count; |
1840 | 0 | if (!bfd_is_abs_section (p->sec) |
1841 | 0 | && bfd_is_abs_section (p->sec->output_section)) |
1842 | 0 | { |
1843 | | /* Input section has been discarded, either because |
1844 | | it is a copy of a linkonce section or due to |
1845 | | linker script /DISCARD/, so we'll be discarding |
1846 | | the relocs too. */ |
1847 | 0 | } |
1848 | 0 | else if (0 < p->count) |
1849 | 0 | { |
1850 | 0 | srel = elf_section_data (p->sec)->sreloc; |
1851 | 0 | srel->size += p->count * sizeof (Elf64_External_Rela); |
1852 | 0 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1853 | 0 | info->flags |= DF_TEXTREL; |
1854 | 0 | } |
1855 | 0 | } |
1856 | 0 | } |
1857 | |
|
1858 | 0 | local_got = elf_local_got_refcounts (ibfd); |
1859 | 0 | if (!local_got) |
1860 | 0 | continue; |
1861 | | |
1862 | 0 | symtab_hdr = &elf_symtab_hdr (ibfd); |
1863 | 0 | locsymcount = symtab_hdr->sh_info; |
1864 | 0 | end_local_got = local_got + locsymcount; |
1865 | 0 | local_tls_type = _bfd_loongarch_elf_local_got_tls_type (ibfd); |
1866 | 0 | s = htab->elf.sgot; |
1867 | 0 | srel = htab->elf.srelgot; |
1868 | 0 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
1869 | 0 | { |
1870 | 0 | if (0 < *local_got) |
1871 | 0 | { |
1872 | 0 | *local_got = s->size; |
1873 | 0 | if (*local_tls_type & (GOT_TLS_GD | GOT_TLS_IE | GOT_TLS_GDESC)) |
1874 | 0 | { |
1875 | | /* TLS gd use two got. */ |
1876 | 0 | if (*local_tls_type & GOT_TLS_GD) |
1877 | 0 | { |
1878 | 0 | s->size += 2 * GOT_ENTRY_SIZE; |
1879 | 0 | if (!bfd_link_executable (info)) |
1880 | 0 | srel->size += sizeof (Elf64_External_Rela); |
1881 | 0 | } |
1882 | | |
1883 | | /* TLS_DESC use two got. */ |
1884 | 0 | if (*local_tls_type & GOT_TLS_GDESC) |
1885 | 0 | { |
1886 | 0 | s->size += 2 * GOT_ENTRY_SIZE; |
1887 | 0 | srel->size += sizeof (Elf64_External_Rela); |
1888 | 0 | } |
1889 | | |
1890 | | /* TLS ie and use one got. */ |
1891 | 0 | if (*local_tls_type & GOT_TLS_IE) |
1892 | 0 | { |
1893 | 0 | s->size += GOT_ENTRY_SIZE; |
1894 | 0 | if (!bfd_link_executable (info)) |
1895 | 0 | srel->size += sizeof (Elf64_External_Rela); |
1896 | 0 | } |
1897 | 0 | } |
1898 | 0 | else |
1899 | 0 | { |
1900 | 0 | s->size += GOT_ENTRY_SIZE; |
1901 | 0 | srel->size += sizeof (Elf64_External_Rela); |
1902 | 0 | } |
1903 | 0 | } |
1904 | 0 | else |
1905 | 0 | *local_got = MINUS_ONE; |
1906 | 0 | } |
1907 | 0 | } |
1908 | | |
1909 | | /* Allocate global sym .plt and .got entries, and space for global |
1910 | | sym dynamic relocs. */ |
1911 | 0 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
1912 | | |
1913 | | /* Allocate global ifunc sym .plt and .got entries, and space for global |
1914 | | ifunc sym dynamic relocs. */ |
1915 | 0 | elf_link_hash_traverse (&htab->elf, elf64_allocate_ifunc_dynrelocs, info); |
1916 | | |
1917 | | /* Allocate .plt and .got entries, and space for local ifunc symbols. */ |
1918 | 0 | htab_traverse (htab->loc_hash_table, |
1919 | 0 | elf64_allocate_local_ifunc_dynrelocs, info); |
1920 | | |
1921 | | /* Don't allocate .got.plt section if there are no PLT. */ |
1922 | 0 | if (htab->elf.sgotplt && htab->elf.sgotplt->size == GOTPLT_HEADER_SIZE |
1923 | 0 | && (htab->elf.splt == NULL || htab->elf.splt->size == 0)) |
1924 | 0 | htab->elf.sgotplt->size = 0; |
1925 | | |
1926 | | /* The check_relocs and adjust_dynamic_symbol entry points have |
1927 | | determined the sizes of the various dynamic sections. Allocate |
1928 | | memory for them. */ |
1929 | 0 | for (s = dynobj->sections; s != NULL; s = s->next) |
1930 | 0 | { |
1931 | 0 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
1932 | 0 | continue; |
1933 | | |
1934 | 0 | if (s == htab->elf.splt || s == htab->elf.iplt || s == htab->elf.sgot |
1935 | 0 | || s == htab->elf.sgotplt || s == htab->elf.igotplt |
1936 | 0 | || s == htab->elf.sdynbss || s == htab->elf.sdynrelro) |
1937 | 0 | { |
1938 | | /* Strip this section if we don't need it; see the |
1939 | | comment below. */ |
1940 | 0 | } |
1941 | 0 | else if (strncmp (s->name, ".rela", 5) == 0) |
1942 | 0 | { |
1943 | 0 | if (s->size != 0) |
1944 | 0 | { |
1945 | | /* We use the reloc_count field as a counter if we need |
1946 | | to copy relocs into the output file. */ |
1947 | 0 | s->reloc_count = 0; |
1948 | 0 | } |
1949 | 0 | } |
1950 | 0 | else |
1951 | 0 | { |
1952 | | /* It's not one of our sections. */ |
1953 | 0 | continue; |
1954 | 0 | } |
1955 | | |
1956 | 0 | if (s->size == 0) |
1957 | 0 | { |
1958 | | /* If we don't need this section, strip it from the |
1959 | | output file. This is mostly to handle .rela.bss and |
1960 | | .rela.plt. We must create both sections in |
1961 | | create_dynamic_sections, because they must be created |
1962 | | before the linker maps input sections to output |
1963 | | sections. The linker does that before |
1964 | | adjust_dynamic_symbol is called, and it is that |
1965 | | function which decides whether anything needs to go |
1966 | | into these sections. */ |
1967 | 0 | s->flags |= SEC_EXCLUDE; |
1968 | 0 | continue; |
1969 | 0 | } |
1970 | | |
1971 | 0 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
1972 | 0 | continue; |
1973 | | |
1974 | | /* Allocate memory for the section contents. Zero the memory |
1975 | | for the benefit of .rela.plt, which has 4 unused entries |
1976 | | at the beginning, and we don't want garbage. */ |
1977 | 0 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
1978 | 0 | if (s->contents == NULL) |
1979 | 0 | return false; |
1980 | 0 | } |
1981 | | |
1982 | 0 | if (elf_hash_table (info)->dynamic_sections_created) |
1983 | 0 | { |
1984 | | /* Add some entries to the .dynamic section. We fill in the |
1985 | | values later, in loongarch_elf_finish_dynamic_sections, but we |
1986 | | must add the entries now so that we get the correct size for |
1987 | | the .dynamic section. The DT_DEBUG entry is filled in by the |
1988 | | dynamic linker and used by the debugger. */ |
1989 | 0 | #define add_dynamic_entry(TAG, VAL) _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
1990 | |
|
1991 | 0 | if (bfd_link_executable (info)) |
1992 | 0 | { |
1993 | 0 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
1994 | 0 | return false; |
1995 | 0 | } |
1996 | | |
1997 | 0 | if (htab->elf.srelplt->size != 0) |
1998 | 0 | { |
1999 | 0 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2000 | 0 | || !add_dynamic_entry (DT_PLTRELSZ, 0) |
2001 | 0 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
2002 | 0 | || !add_dynamic_entry (DT_JMPREL, 0)) |
2003 | 0 | return false; |
2004 | 0 | } |
2005 | | |
2006 | 0 | if (!add_dynamic_entry (DT_RELA, 0) |
2007 | 0 | || !add_dynamic_entry (DT_RELASZ, 0) |
2008 | 0 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
2009 | 0 | return false; |
2010 | | |
2011 | | /* If any dynamic relocs apply to a read-only section, |
2012 | | then we need a DT_TEXTREL entry. */ |
2013 | 0 | if ((info->flags & DF_TEXTREL) == 0) |
2014 | 0 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); |
2015 | |
|
2016 | 0 | if (info->flags & DF_TEXTREL) |
2017 | 0 | { |
2018 | 0 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
2019 | 0 | return false; |
2020 | | /* Clear the DF_TEXTREL flag. It will be set again if we |
2021 | | write out an actual text relocation; we may not, because |
2022 | | at this point we do not know whether e.g. any .eh_frame |
2023 | | absolute relocations have been converted to PC-relative. */ |
2024 | 0 | info->flags &= ~DF_TEXTREL; |
2025 | 0 | } |
2026 | 0 | } |
2027 | 0 | #undef add_dynamic_entry |
2028 | | |
2029 | 0 | return true; |
2030 | 0 | } |
2031 | | |
2032 | 0 | #define LARCH_LD_STACK_DEPTH 16 |
2033 | | static int64_t larch_opc_stack[LARCH_LD_STACK_DEPTH]; |
2034 | | static size_t larch_stack_top = 0; |
2035 | | |
2036 | | static bfd_reloc_status_type |
2037 | | loongarch_push (int64_t val) |
2038 | 0 | { |
2039 | 0 | if (LARCH_LD_STACK_DEPTH <= larch_stack_top) |
2040 | 0 | return bfd_reloc_outofrange; |
2041 | 0 | larch_opc_stack[larch_stack_top++] = val; |
2042 | 0 | return bfd_reloc_ok; |
2043 | 0 | } |
2044 | | |
2045 | | static bfd_reloc_status_type |
2046 | | loongarch_pop (int64_t *val) |
2047 | 0 | { |
2048 | 0 | if (larch_stack_top == 0) |
2049 | 0 | return bfd_reloc_outofrange; |
2050 | 0 | BFD_ASSERT (val); |
2051 | 0 | *val = larch_opc_stack[--larch_stack_top]; |
2052 | 0 | return bfd_reloc_ok; |
2053 | 0 | } |
2054 | | |
2055 | | static bfd_reloc_status_type |
2056 | | loongarch_top (int64_t *val) |
2057 | 0 | { |
2058 | 0 | if (larch_stack_top == 0) |
2059 | 0 | return bfd_reloc_outofrange; |
2060 | 0 | BFD_ASSERT (val); |
2061 | 0 | *val = larch_opc_stack[larch_stack_top - 1]; |
2062 | 0 | return bfd_reloc_ok; |
2063 | 0 | } |
2064 | | |
2065 | | static void |
2066 | | loongarch_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) |
2067 | 0 | { |
2068 | 0 | BFD_ASSERT (s && s->contents); |
2069 | 0 | const struct elf_backend_data *bed; |
2070 | 0 | bfd_byte *loc; |
2071 | |
|
2072 | 0 | bed = get_elf_backend_data (abfd); |
2073 | 0 | if (!(s->size > s->reloc_count * bed->s->sizeof_rela)) |
2074 | 0 | BFD_ASSERT (s->size > s->reloc_count * bed->s->sizeof_rela); |
2075 | 0 | loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); |
2076 | 0 | bed->s->swap_reloca_out (abfd, rel, loc); |
2077 | 0 | } |
2078 | | |
2079 | | /* Check rel->r_offset in range of contents. */ |
2080 | | static bfd_reloc_status_type |
2081 | | loongarch_check_offset (const Elf_Internal_Rela *rel, |
2082 | | const asection *input_section) |
2083 | 0 | { |
2084 | 0 | if (0 == strcmp(input_section->name, ".text") |
2085 | 0 | && rel->r_offset > input_section->size) |
2086 | 0 | return bfd_reloc_overflow; |
2087 | | |
2088 | 0 | return bfd_reloc_ok; |
2089 | 0 | } |
2090 | | |
2091 | | #define LARCH_RELOC_PERFORM_3OP(op1, op2, op3) \ |
2092 | 0 | ({ \ |
2093 | 0 | bfd_reloc_status_type ret = loongarch_pop (&op2); \ |
2094 | 0 | if (ret == bfd_reloc_ok) \ |
2095 | 0 | { \ |
2096 | 0 | ret = loongarch_pop (&op1); \ |
2097 | 0 | if (ret == bfd_reloc_ok) \ |
2098 | 0 | ret = loongarch_push (op3); \ |
2099 | 0 | } \ |
2100 | 0 | ret; \ |
2101 | 0 | }) |
2102 | | |
2103 | | /* Write immediate to instructions. */ |
2104 | | |
2105 | | static bfd_reloc_status_type |
2106 | | loongarch_reloc_rewrite_imm_insn (const Elf_Internal_Rela *rel, |
2107 | | const asection *input_section ATTRIBUTE_UNUSED, |
2108 | | reloc_howto_type *howto, bfd *input_bfd, |
2109 | | bfd_byte *contents, bfd_vma reloc_val) |
2110 | 0 | { |
2111 | | /* Adjust the immediate based on alignment and |
2112 | | its position in the instruction. */ |
2113 | 0 | if (!loongarch_adjust_reloc_bitsfield (input_bfd, howto, &reloc_val)) |
2114 | 0 | return bfd_reloc_overflow; |
2115 | | |
2116 | 0 | int bits = bfd_get_reloc_size (howto) * 8; |
2117 | 0 | uint64_t insn = bfd_get (bits, input_bfd, contents + rel->r_offset); |
2118 | | |
2119 | | /* Write immediate to instruction. */ |
2120 | 0 | insn = (insn & ~howto->dst_mask) | (reloc_val & howto->dst_mask); |
2121 | |
|
2122 | 0 | bfd_put (bits, input_bfd, insn, contents + rel->r_offset); |
2123 | | |
2124 | 0 | return bfd_reloc_ok; |
2125 | 0 | } |
2126 | | |
2127 | | static bfd_reloc_status_type |
2128 | | perform_relocation (const Elf_Internal_Rela *rel, asection *input_section, |
2129 | | reloc_howto_type *howto, bfd_vma value, |
2130 | | bfd *input_bfd, bfd_byte *contents) |
2131 | 0 | { |
2132 | 0 | int64_t opr1, opr2, opr3; |
2133 | 0 | bfd_reloc_status_type r = bfd_reloc_ok; |
2134 | 0 | int bits = bfd_get_reloc_size (howto) * 8; |
2135 | |
|
2136 | 0 | switch (ELF64_R_TYPE (rel->r_info)) |
2137 | 0 | { |
2138 | 0 | case R_LARCH_SOP_PUSH_PCREL: |
2139 | 0 | case R_LARCH_SOP_PUSH_ABSOLUTE: |
2140 | 0 | case R_LARCH_SOP_PUSH_GPREL: |
2141 | 0 | case R_LARCH_SOP_PUSH_TLS_TPREL: |
2142 | 0 | case R_LARCH_SOP_PUSH_TLS_GOT: |
2143 | 0 | case R_LARCH_SOP_PUSH_TLS_GD: |
2144 | 0 | case R_LARCH_SOP_PUSH_PLT_PCREL: |
2145 | 0 | r = loongarch_push (value); |
2146 | 0 | break; |
2147 | | |
2148 | 0 | case R_LARCH_SOP_PUSH_DUP: |
2149 | 0 | r = loongarch_pop (&opr1); |
2150 | 0 | if (r == bfd_reloc_ok) |
2151 | 0 | { |
2152 | 0 | r = loongarch_push (opr1); |
2153 | 0 | if (r == bfd_reloc_ok) |
2154 | 0 | r = loongarch_push (opr1); |
2155 | 0 | } |
2156 | 0 | break; |
2157 | | |
2158 | 0 | case R_LARCH_SOP_ASSERT: |
2159 | 0 | r = loongarch_pop (&opr1); |
2160 | 0 | if (r != bfd_reloc_ok || !opr1) |
2161 | 0 | r = bfd_reloc_notsupported; |
2162 | 0 | break; |
2163 | | |
2164 | 0 | case R_LARCH_SOP_NOT: |
2165 | 0 | r = loongarch_pop (&opr1); |
2166 | 0 | if (r == bfd_reloc_ok) |
2167 | 0 | r = loongarch_push (!opr1); |
2168 | 0 | break; |
2169 | | |
2170 | 0 | case R_LARCH_SOP_SUB: |
2171 | 0 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 - opr2); |
2172 | 0 | break; |
2173 | | |
2174 | 0 | case R_LARCH_SOP_SL: |
2175 | 0 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 << opr2); |
2176 | 0 | break; |
2177 | | |
2178 | 0 | case R_LARCH_SOP_SR: |
2179 | 0 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 >> opr2); |
2180 | 0 | break; |
2181 | | |
2182 | 0 | case R_LARCH_SOP_AND: |
2183 | 0 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 & opr2); |
2184 | 0 | break; |
2185 | | |
2186 | 0 | case R_LARCH_SOP_ADD: |
2187 | 0 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 + opr2); |
2188 | 0 | break; |
2189 | | |
2190 | 0 | case R_LARCH_SOP_IF_ELSE: |
2191 | 0 | r = loongarch_pop (&opr3); |
2192 | 0 | if (r == bfd_reloc_ok) |
2193 | 0 | { |
2194 | 0 | r = loongarch_pop (&opr2); |
2195 | 0 | if (r == bfd_reloc_ok) |
2196 | 0 | { |
2197 | 0 | r = loongarch_pop (&opr1); |
2198 | 0 | if (r == bfd_reloc_ok) |
2199 | 0 | r = loongarch_push (opr1 ? opr2 : opr3); |
2200 | 0 | } |
2201 | 0 | } |
2202 | 0 | break; |
2203 | | |
2204 | 0 | case R_LARCH_SOP_POP_32_S_10_5: |
2205 | 0 | case R_LARCH_SOP_POP_32_S_10_12: |
2206 | 0 | case R_LARCH_SOP_POP_32_S_10_16: |
2207 | 0 | case R_LARCH_SOP_POP_32_S_10_16_S2: |
2208 | 0 | case R_LARCH_SOP_POP_32_S_0_5_10_16_S2: |
2209 | 0 | case R_LARCH_SOP_POP_32_S_0_10_10_16_S2: |
2210 | 0 | case R_LARCH_SOP_POP_32_S_5_20: |
2211 | 0 | case R_LARCH_SOP_POP_32_U_10_12: |
2212 | 0 | case R_LARCH_SOP_POP_32_U: |
2213 | 0 | r = loongarch_pop (&opr1); |
2214 | 0 | if (r != bfd_reloc_ok) |
2215 | 0 | break; |
2216 | 0 | r = loongarch_check_offset (rel, input_section); |
2217 | 0 | if (r != bfd_reloc_ok) |
2218 | 0 | break; |
2219 | | |
2220 | 0 | r = loongarch_reloc_rewrite_imm_insn (rel, input_section, |
2221 | 0 | howto, input_bfd, |
2222 | 0 | contents, (bfd_vma)opr1); |
2223 | 0 | break; |
2224 | | |
2225 | 0 | case R_LARCH_TLS_DTPREL32: |
2226 | 0 | case R_LARCH_32: |
2227 | 0 | case R_LARCH_TLS_DTPREL64: |
2228 | 0 | case R_LARCH_64: |
2229 | 0 | r = loongarch_check_offset (rel, input_section); |
2230 | 0 | if (r != bfd_reloc_ok) |
2231 | 0 | break; |
2232 | | |
2233 | 0 | bfd_put (bits, input_bfd, value, contents + rel->r_offset); |
2234 | 0 | break; |
2235 | | |
2236 | | /* LoongArch only has add/sub reloc pair, not has set/sub reloc pair. |
2237 | | Because set/sub reloc pair not support multi-thread. While add/sub |
2238 | | reloc pair process order not affect the final result. |
2239 | | |
2240 | | For add/sub reloc, the original value will be involved in the |
2241 | | calculation. In order not to add/sub extra value, we write 0 to symbol |
2242 | | address at assembly time. |
2243 | | |
2244 | | add/sub reloc bits determined by the value after symbol subtraction, |
2245 | | not symbol value. |
2246 | | |
2247 | | add/sub reloc save part of the symbol value, so we only need to |
2248 | | save howto->dst_mask bits. */ |
2249 | 0 | case R_LARCH_ADD6: |
2250 | 0 | case R_LARCH_SUB6: |
2251 | 0 | { |
2252 | 0 | bfd_vma word = bfd_get (howto->bitsize, input_bfd, |
2253 | 0 | contents + rel->r_offset); |
2254 | 0 | word = (word & ~howto->dst_mask) | (value & howto->dst_mask); |
2255 | 0 | bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset); |
2256 | 0 | r = bfd_reloc_ok; |
2257 | 0 | break; |
2258 | 0 | } |
2259 | | |
2260 | | /* Not need to read the original value, just write the new value. */ |
2261 | 0 | case R_LARCH_ADD8: |
2262 | 0 | case R_LARCH_ADD16: |
2263 | 0 | case R_LARCH_ADD24: |
2264 | 0 | case R_LARCH_ADD32: |
2265 | 0 | case R_LARCH_ADD64: |
2266 | 0 | case R_LARCH_SUB8: |
2267 | 0 | case R_LARCH_SUB16: |
2268 | 0 | case R_LARCH_SUB24: |
2269 | 0 | case R_LARCH_SUB32: |
2270 | 0 | case R_LARCH_SUB64: |
2271 | 0 | { |
2272 | | /* Because add/sub reloc is processed separately, |
2273 | | so the high bits is invalid. */ |
2274 | 0 | bfd_vma word = value & howto->dst_mask; |
2275 | 0 | bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset); |
2276 | 0 | r = bfd_reloc_ok; |
2277 | 0 | break; |
2278 | 0 | } |
2279 | | |
2280 | 0 | case R_LARCH_ADD_ULEB128: |
2281 | 0 | case R_LARCH_SUB_ULEB128: |
2282 | 0 | { |
2283 | 0 | unsigned int len = 0; |
2284 | | /* Before write uleb128, first read it to get it's length. */ |
2285 | 0 | _bfd_read_unsigned_leb128 (input_bfd, contents + rel->r_offset, &len); |
2286 | 0 | loongarch_write_unsigned_leb128 (contents + rel->r_offset, len, value); |
2287 | 0 | r = bfd_reloc_ok; |
2288 | 0 | break; |
2289 | 0 | } |
2290 | | |
2291 | | /* For eh_frame and debug info. */ |
2292 | 0 | case R_LARCH_32_PCREL: |
2293 | 0 | case R_LARCH_64_PCREL: |
2294 | 0 | { |
2295 | 0 | value -= sec_addr (input_section) + rel->r_offset; |
2296 | 0 | value += rel->r_addend; |
2297 | 0 | bfd_vma word = bfd_get (howto->bitsize, input_bfd, |
2298 | 0 | contents + rel->r_offset); |
2299 | 0 | word = (word & ~howto->dst_mask) | (value & howto->dst_mask); |
2300 | 0 | bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset); |
2301 | 0 | r = bfd_reloc_ok; |
2302 | 0 | break; |
2303 | 0 | } |
2304 | | |
2305 | | /* New reloc type. |
2306 | | R_LARCH_B16 ~ R_LARCH_TLS_GD_HI20. */ |
2307 | 0 | case R_LARCH_B16: |
2308 | 0 | case R_LARCH_B21: |
2309 | 0 | case R_LARCH_B26: |
2310 | 0 | case R_LARCH_ABS_HI20: |
2311 | 0 | case R_LARCH_ABS_LO12: |
2312 | 0 | case R_LARCH_ABS64_LO20: |
2313 | 0 | case R_LARCH_ABS64_HI12: |
2314 | 0 | case R_LARCH_PCALA_HI20: |
2315 | 0 | case R_LARCH_PCALA_LO12: |
2316 | 0 | case R_LARCH_PCALA64_LO20: |
2317 | 0 | case R_LARCH_PCALA64_HI12: |
2318 | 0 | case R_LARCH_GOT_PC_HI20: |
2319 | 0 | case R_LARCH_GOT_PC_LO12: |
2320 | 0 | case R_LARCH_GOT64_PC_LO20: |
2321 | 0 | case R_LARCH_GOT64_PC_HI12: |
2322 | 0 | case R_LARCH_GOT_HI20: |
2323 | 0 | case R_LARCH_GOT_LO12: |
2324 | 0 | case R_LARCH_GOT64_LO20: |
2325 | 0 | case R_LARCH_GOT64_HI12: |
2326 | 0 | case R_LARCH_TLS_LE_HI20: |
2327 | 0 | case R_LARCH_TLS_LE_LO12: |
2328 | 0 | case R_LARCH_TLS_LE_HI20_R: |
2329 | 0 | case R_LARCH_TLS_LE_LO12_R: |
2330 | 0 | case R_LARCH_TLS_LE64_LO20: |
2331 | 0 | case R_LARCH_TLS_LE64_HI12: |
2332 | 0 | case R_LARCH_TLS_IE_PC_HI20: |
2333 | 0 | case R_LARCH_TLS_IE_PC_LO12: |
2334 | 0 | case R_LARCH_TLS_IE64_PC_LO20: |
2335 | 0 | case R_LARCH_TLS_IE64_PC_HI12: |
2336 | 0 | case R_LARCH_TLS_IE_HI20: |
2337 | 0 | case R_LARCH_TLS_IE_LO12: |
2338 | 0 | case R_LARCH_TLS_IE64_LO20: |
2339 | 0 | case R_LARCH_TLS_IE64_HI12: |
2340 | 0 | case R_LARCH_TLS_LD_PC_HI20: |
2341 | 0 | case R_LARCH_TLS_LD_HI20: |
2342 | 0 | case R_LARCH_TLS_GD_PC_HI20: |
2343 | 0 | case R_LARCH_TLS_GD_HI20: |
2344 | 0 | case R_LARCH_PCREL20_S2: |
2345 | 0 | case R_LARCH_CALL36: |
2346 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
2347 | 0 | case R_LARCH_TLS_DESC_PC_LO12: |
2348 | 0 | case R_LARCH_TLS_DESC64_PC_LO20: |
2349 | 0 | case R_LARCH_TLS_DESC64_PC_HI12: |
2350 | 0 | case R_LARCH_TLS_DESC_HI20: |
2351 | 0 | case R_LARCH_TLS_DESC_LO12: |
2352 | 0 | case R_LARCH_TLS_DESC64_LO20: |
2353 | 0 | case R_LARCH_TLS_DESC64_HI12: |
2354 | 0 | case R_LARCH_TLS_LD_PCREL20_S2: |
2355 | 0 | case R_LARCH_TLS_GD_PCREL20_S2: |
2356 | 0 | case R_LARCH_TLS_DESC_PCREL20_S2: |
2357 | 0 | r = loongarch_check_offset (rel, input_section); |
2358 | 0 | if (r != bfd_reloc_ok) |
2359 | 0 | break; |
2360 | | |
2361 | 0 | r = loongarch_reloc_rewrite_imm_insn (rel, input_section, |
2362 | 0 | howto, input_bfd, |
2363 | 0 | contents, value); |
2364 | 0 | break; |
2365 | | |
2366 | 0 | case R_LARCH_TLS_DESC_LD: |
2367 | 0 | case R_LARCH_TLS_DESC_CALL: |
2368 | 0 | r = bfd_reloc_ok; |
2369 | 0 | break; |
2370 | | |
2371 | 0 | case R_LARCH_RELAX: |
2372 | 0 | case R_LARCH_TLS_LE_ADD_R: |
2373 | 0 | break; |
2374 | | |
2375 | 0 | default: |
2376 | 0 | r = bfd_reloc_notsupported; |
2377 | 0 | } |
2378 | 0 | return r; |
2379 | 0 | } |
2380 | | |
2381 | 0 | #define LARCH_RECENT_RELOC_QUEUE_LENGTH 72 |
2382 | | static struct |
2383 | | { |
2384 | | bfd *bfd; |
2385 | | asection *section; |
2386 | | bfd_vma r_offset; |
2387 | | int r_type; |
2388 | | bfd_vma relocation; |
2389 | | Elf_Internal_Sym *sym; |
2390 | | struct elf_link_hash_entry *h; |
2391 | | bfd_vma addend; |
2392 | | int64_t top_then; |
2393 | | } larch_reloc_queue[LARCH_RECENT_RELOC_QUEUE_LENGTH]; |
2394 | | static size_t larch_reloc_queue_head = 0; |
2395 | | static size_t larch_reloc_queue_tail = 0; |
2396 | | |
2397 | | static const char * |
2398 | | loongarch_sym_name (bfd *input_bfd, struct elf_link_hash_entry *h, |
2399 | | Elf_Internal_Sym *sym) |
2400 | 0 | { |
2401 | 0 | const char *ret = NULL; |
2402 | 0 | if (sym) |
2403 | 0 | ret = bfd_elf_string_from_elf_section (input_bfd, |
2404 | 0 | elf_symtab_hdr (input_bfd).sh_link, |
2405 | 0 | sym->st_name); |
2406 | 0 | else if (h) |
2407 | 0 | ret = h->root.root.string; |
2408 | |
|
2409 | 0 | if (ret == NULL || *ret == '\0') |
2410 | 0 | ret = "<nameless>"; |
2411 | 0 | return ret; |
2412 | 0 | } |
2413 | | |
2414 | | static void |
2415 | | loongarch_record_one_reloc (bfd *abfd, asection *section, int r_type, |
2416 | | bfd_vma r_offset, Elf_Internal_Sym *sym, |
2417 | | struct elf_link_hash_entry *h, bfd_vma addend) |
2418 | 0 | { |
2419 | 0 | if ((larch_reloc_queue_head == 0 |
2420 | 0 | && larch_reloc_queue_tail == LARCH_RECENT_RELOC_QUEUE_LENGTH - 1) |
2421 | 0 | || larch_reloc_queue_head == larch_reloc_queue_tail + 1) |
2422 | 0 | larch_reloc_queue_head = |
2423 | 0 | (larch_reloc_queue_head + 1) % LARCH_RECENT_RELOC_QUEUE_LENGTH; |
2424 | 0 | larch_reloc_queue[larch_reloc_queue_tail].bfd = abfd; |
2425 | 0 | larch_reloc_queue[larch_reloc_queue_tail].section = section; |
2426 | 0 | larch_reloc_queue[larch_reloc_queue_tail].r_offset = r_offset; |
2427 | 0 | larch_reloc_queue[larch_reloc_queue_tail].r_type = r_type; |
2428 | 0 | larch_reloc_queue[larch_reloc_queue_tail].sym = sym; |
2429 | 0 | larch_reloc_queue[larch_reloc_queue_tail].h = h; |
2430 | 0 | larch_reloc_queue[larch_reloc_queue_tail].addend = addend; |
2431 | 0 | loongarch_top (&larch_reloc_queue[larch_reloc_queue_tail].top_then); |
2432 | 0 | larch_reloc_queue_tail = |
2433 | 0 | (larch_reloc_queue_tail + 1) % LARCH_RECENT_RELOC_QUEUE_LENGTH; |
2434 | 0 | } |
2435 | | |
2436 | | static void |
2437 | | loongarch_dump_reloc_record (void (*p) (const char *fmt, ...)) |
2438 | 0 | { |
2439 | 0 | size_t i = larch_reloc_queue_head; |
2440 | 0 | bfd *a_bfd = NULL; |
2441 | 0 | asection *section = NULL; |
2442 | 0 | bfd_vma r_offset = 0; |
2443 | 0 | int inited = 0; |
2444 | 0 | p ("Dump relocate record:\n"); |
2445 | 0 | p ("stack top\t\trelocation name\t\tsymbol"); |
2446 | 0 | while (i != larch_reloc_queue_tail) |
2447 | 0 | { |
2448 | 0 | if (a_bfd != larch_reloc_queue[i].bfd |
2449 | 0 | || section != larch_reloc_queue[i].section |
2450 | 0 | || r_offset != larch_reloc_queue[i].r_offset) |
2451 | 0 | { |
2452 | 0 | a_bfd = larch_reloc_queue[i].bfd; |
2453 | 0 | section = larch_reloc_queue[i].section; |
2454 | 0 | r_offset = larch_reloc_queue[i].r_offset; |
2455 | 0 | p ("\nat %pB(%pA+0x%v):\n", larch_reloc_queue[i].bfd, |
2456 | 0 | larch_reloc_queue[i].section, larch_reloc_queue[i].r_offset); |
2457 | 0 | } |
2458 | |
|
2459 | 0 | if (!inited) |
2460 | 0 | inited = 1, p ("...\n"); |
2461 | |
|
2462 | 0 | reloc_howto_type *howto = |
2463 | 0 | loongarch_elf_rtype_to_howto (larch_reloc_queue[i].bfd, |
2464 | 0 | larch_reloc_queue[i].r_type); |
2465 | 0 | p ("0x%V %s\t`%s'", (bfd_vma) larch_reloc_queue[i].top_then, |
2466 | 0 | howto ? howto->name : "<unknown reloc>", |
2467 | 0 | loongarch_sym_name (larch_reloc_queue[i].bfd, larch_reloc_queue[i].h, |
2468 | 0 | larch_reloc_queue[i].sym)); |
2469 | |
|
2470 | 0 | long addend = larch_reloc_queue[i].addend; |
2471 | 0 | if (addend < 0) |
2472 | 0 | p (" - %ld", -addend); |
2473 | 0 | else if (0 < addend) |
2474 | 0 | p (" + %ld(0x%v)", addend, larch_reloc_queue[i].addend); |
2475 | |
|
2476 | 0 | p ("\n"); |
2477 | 0 | i = (i + 1) % LARCH_RECENT_RELOC_QUEUE_LENGTH; |
2478 | 0 | } |
2479 | 0 | p ("\n" |
2480 | 0 | "-- Record dump end --\n\n"); |
2481 | 0 | } |
2482 | | |
2483 | | static bool |
2484 | | loongarch_reloc_is_fatal (struct bfd_link_info *info, |
2485 | | bfd *input_bfd, |
2486 | | asection *input_section, |
2487 | | Elf_Internal_Rela *rel, |
2488 | | reloc_howto_type *howto, |
2489 | | bfd_reloc_status_type rtype, |
2490 | | bool is_undefweak, |
2491 | | const char *name, |
2492 | | const char *msg) |
2493 | 0 | { |
2494 | 0 | bool fatal = true; |
2495 | 0 | switch (rtype) |
2496 | 0 | { |
2497 | | /* 'dangerous' means we do it but can't promise it's ok |
2498 | | 'unsupport' means out of ability of relocation type |
2499 | | 'undefined' means we can't deal with the undefined symbol. */ |
2500 | 0 | case bfd_reloc_undefined: |
2501 | 0 | info->callbacks->undefined_symbol (info, name, input_bfd, input_section, |
2502 | 0 | rel->r_offset, true); |
2503 | 0 | info->callbacks->info ("%X%pB(%pA+0x%v): error: %s against %s`%s':\n%s\n", |
2504 | 0 | input_bfd, input_section, rel->r_offset, |
2505 | 0 | howto->name, |
2506 | 0 | is_undefweak ? "[undefweak] " : "", name, msg); |
2507 | 0 | break; |
2508 | 0 | case bfd_reloc_dangerous: |
2509 | 0 | info->callbacks->info ("%pB(%pA+0x%v): warning: %s against %s`%s':\n%s\n", |
2510 | 0 | input_bfd, input_section, rel->r_offset, |
2511 | 0 | howto->name, |
2512 | 0 | is_undefweak ? "[undefweak] " : "", name, msg); |
2513 | 0 | fatal = false; |
2514 | 0 | break; |
2515 | 0 | case bfd_reloc_notsupported: |
2516 | 0 | info->callbacks->info ("%X%pB(%pA+0x%v): error: %s against %s`%s':\n%s\n", |
2517 | 0 | input_bfd, input_section, rel->r_offset, |
2518 | 0 | howto->name, |
2519 | 0 | is_undefweak ? "[undefweak] " : "", name, msg); |
2520 | 0 | break; |
2521 | 0 | default: |
2522 | 0 | break; |
2523 | 0 | } |
2524 | 0 | return fatal; |
2525 | 0 | } |
2526 | | |
2527 | | /* If lo12 immediate > 0x7ff, because sign-extend caused by addi.d/ld.d, |
2528 | | hi20 immediate need to add 0x1. |
2529 | | For example: pc 0x120000000, symbol 0x120000812 |
2530 | | lo12 immediate is 0x812, 0x120000812 & 0xfff = 0x812 |
2531 | | hi20 immediate is 1, because lo12 imm > 0x7ff, symbol need to add 0x1000 |
2532 | | (((0x120000812 + 0x1000) & ~0xfff) - (0x120000000 & ~0xfff)) >> 12 = 0x1 |
2533 | | |
2534 | | At run: |
2535 | | pcalau12i $t0, hi20 (0x1) |
2536 | | $t0 = 0x120000000 + (0x1 << 12) = 0x120001000 |
2537 | | addi.d $t0, $t0, lo12 (0x812) |
2538 | | $t0 = 0x120001000 + 0xfffffffffffff812 (-(0x1000 - 0x812) = -0x7ee) |
2539 | | = 0x120001000 - 0x7ee (0x1000 - 0x7ee = 0x812) |
2540 | | = 0x120000812 |
2541 | | Without hi20 add 0x1000, the result 0x120000000 - 0x7ee = 0x11ffff812 is |
2542 | | error. |
2543 | | 0x1000 + sign-extend-to64(0x8xx) = 0x8xx. */ |
2544 | | #define RELOCATE_CALC_PC32_HI20(relocation, pc) \ |
2545 | 0 | ({ \ |
2546 | 0 | bfd_vma __lo = (relocation) & ((bfd_vma)0xfff); \ |
2547 | 0 | relocation = (relocation & ~(bfd_vma)0xfff) \ |
2548 | 0 | - (pc & ~(bfd_vma)0xfff); \ |
2549 | 0 | if (__lo > 0x7ff) \ |
2550 | 0 | relocation += 0x1000; \ |
2551 | 0 | }) |
2552 | | |
2553 | | /* Handle problems caused by symbol extensions in TLS LE, The processing |
2554 | | is similar to the macro RELOCATE_CALC_PC32_HI20 method. */ |
2555 | | #define RELOCATE_TLS_TP32_HI20(relocation) \ |
2556 | 0 | ({ \ |
2557 | 0 | bfd_vma __lo = (relocation) & ((bfd_vma)0xfff); \ |
2558 | 0 | if (__lo > 0x7ff) \ |
2559 | 0 | relocation += 0x800; \ |
2560 | 0 | relocation = relocation & ~(bfd_vma)0xfff; \ |
2561 | 0 | }) |
2562 | | |
2563 | | /* For example: pc is 0x11000010000100, symbol is 0x1812348ffff812 |
2564 | | offset = (0x1812348ffff812 & ~0xfff) - (0x11000010000100 & ~0xfff) |
2565 | | = 0x712347ffff000 |
2566 | | lo12: 0x1812348ffff812 & 0xfff = 0x812 |
2567 | | hi20: 0x7ffff + 0x1(lo12 > 0x7ff) = 0x80000 |
2568 | | lo20: 0x71234 - 0x1(lo12 > 0x7ff) + 0x1(hi20 > 0x7ffff) |
2569 | | hi12: 0x0 |
2570 | | |
2571 | | pcalau12i $t1, hi20 (0x80000) |
2572 | | $t1 = 0x11000010000100 + sign-extend(0x80000 << 12) |
2573 | | = 0x11000010000100 + 0xffffffff80000000 |
2574 | | = 0x10ffff90000000 |
2575 | | addi.d $t0, $zero, lo12 (0x812) |
2576 | | $t0 = 0xfffffffffffff812 (if lo12 > 0x7ff, because sign-extend, |
2577 | | lo20 need to sub 0x1) |
2578 | | lu32i.d $t0, lo20 (0x71234) |
2579 | | $t0 = {0x71234, 0xfffff812} |
2580 | | = 0x71234fffff812 |
2581 | | lu52i.d $t0, hi12 (0x0) |
2582 | | $t0 = {0x0, 0x71234fffff812} |
2583 | | = 0x71234fffff812 |
2584 | | add.d $t1, $t1, $t0 |
2585 | | $t1 = 0x10ffff90000000 + 0x71234fffff812 |
2586 | | = 0x1812348ffff812. */ |
2587 | | #define RELOCATE_CALC_PC64_HI32(relocation, pc) \ |
2588 | 0 | ({ \ |
2589 | 0 | bfd_vma __lo = (relocation & (bfd_vma)0xfff); \ |
2590 | 0 | relocation = (relocation & ~(bfd_vma)0xfff) \ |
2591 | 0 | - ((pc) & ~(bfd_vma)0xfff); \ |
2592 | 0 | if (__lo > 0x7ff) \ |
2593 | 0 | relocation += (0x1000 - 0x100000000); \ |
2594 | 0 | if (relocation & 0x80000000) \ |
2595 | 0 | relocation += 0x100000000; \ |
2596 | 0 | }) |
2597 | | |
2598 | | |
2599 | | /* Compute the tp/dtp offset of a tls symbol. |
2600 | | It is dtp offset in dynamic tls model (gd/ld) and tp |
2601 | | offset in static tls model (ie/le). Both offsets are |
2602 | | calculated the same way on LoongArch, so the same |
2603 | | function is used. */ |
2604 | | static bfd_vma |
2605 | | tlsoff (struct bfd_link_info *info, bfd_vma addr) |
2606 | 0 | { |
2607 | | /* If tls_sec is NULL, we should have signalled an error already. */ |
2608 | 0 | if (elf_hash_table (info)->tls_sec == NULL) |
2609 | 0 | return 0; |
2610 | 0 | return addr - elf_hash_table (info)->tls_sec->vma; |
2611 | 0 | } |
2612 | | |
2613 | | |
2614 | | static int |
2615 | | loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
2616 | | bfd *input_bfd, asection *input_section, |
2617 | | bfd_byte *contents, Elf_Internal_Rela *relocs, |
2618 | | Elf_Internal_Sym *local_syms, |
2619 | | asection **local_sections) |
2620 | 0 | { |
2621 | 0 | Elf_Internal_Rela *rel; |
2622 | 0 | Elf_Internal_Rela *relend; |
2623 | 0 | bool fatal = false; |
2624 | 0 | asection *sreloc = elf_section_data (input_section)->sreloc; |
2625 | 0 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); |
2626 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_bfd); |
2627 | 0 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
2628 | 0 | bfd_vma *local_got_offsets = elf_local_got_offsets (input_bfd); |
2629 | 0 | bool is_pic = bfd_link_pic (info); |
2630 | 0 | bool is_dyn = elf_hash_table (info)->dynamic_sections_created; |
2631 | 0 | asection *plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
2632 | 0 | asection *got = htab->elf.sgot; |
2633 | |
|
2634 | 0 | relend = relocs + input_section->reloc_count; |
2635 | 0 | for (rel = relocs; rel < relend; rel++) |
2636 | 0 | { |
2637 | 0 | unsigned int r_type = ELF64_R_TYPE (rel->r_info); |
2638 | 0 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
2639 | 0 | bfd_vma pc = sec_addr (input_section) + rel->r_offset; |
2640 | 0 | reloc_howto_type *howto = NULL; |
2641 | 0 | asection *sec = NULL; |
2642 | 0 | Elf_Internal_Sym *sym = NULL; |
2643 | 0 | struct elf_link_hash_entry *h = NULL; |
2644 | 0 | const char *name; |
2645 | 0 | bfd_reloc_status_type r = bfd_reloc_ok; |
2646 | 0 | bool is_ie, is_desc, is_undefweak, unresolved_reloc, defined_local; |
2647 | 0 | bool resolved_local, resolved_dynly, resolved_to_const; |
2648 | 0 | char tls_type; |
2649 | 0 | bfd_vma relocation, off, ie_off, desc_off; |
2650 | 0 | int i, j; |
2651 | | |
2652 | | /* When an unrecognized relocation is encountered, which usually |
2653 | | occurs when using a newer assembler but an older linker, an error |
2654 | | should be reported instead of continuing to the next relocation. */ |
2655 | 0 | howto = loongarch_elf_rtype_to_howto (input_bfd, r_type); |
2656 | 0 | if (howto == NULL) |
2657 | 0 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
2658 | | |
2659 | 0 | if (r_type == R_LARCH_GNU_VTINHERIT || r_type == R_LARCH_GNU_VTENTRY) |
2660 | 0 | continue; |
2661 | | |
2662 | | /* This is a final link. */ |
2663 | 0 | if (r_symndx < symtab_hdr->sh_info) |
2664 | 0 | { |
2665 | 0 | is_undefweak = false; |
2666 | 0 | unresolved_reloc = false; |
2667 | 0 | sym = local_syms + r_symndx; |
2668 | 0 | sec = local_sections[r_symndx]; |
2669 | 0 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
2670 | | |
2671 | | /* Relocate against local STT_GNU_IFUNC symbol. */ |
2672 | 0 | if (!bfd_link_relocatable (info) |
2673 | 0 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
2674 | 0 | { |
2675 | 0 | h = elf64_loongarch_get_local_sym_hash (htab, input_bfd, rel, |
2676 | 0 | false); |
2677 | 0 | if (h == NULL) |
2678 | 0 | abort (); |
2679 | | |
2680 | | /* Set STT_GNU_IFUNC symbol value. */ |
2681 | 0 | h->root.u.def.value = sym->st_value; |
2682 | 0 | h->root.u.def.section = sec; |
2683 | 0 | } |
2684 | 0 | defined_local = true; |
2685 | 0 | resolved_local = true; |
2686 | 0 | resolved_dynly = false; |
2687 | 0 | resolved_to_const = false; |
2688 | | |
2689 | | /* Calc in funtion elf_link_input_bfd, |
2690 | | * if #define elf_backend_rela_normal to 1. */ |
2691 | 0 | if (bfd_link_relocatable (info) |
2692 | 0 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
2693 | 0 | continue; |
2694 | 0 | } |
2695 | 0 | else |
2696 | 0 | { |
2697 | 0 | bool warned, ignored; |
2698 | |
|
2699 | 0 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2700 | 0 | r_symndx, symtab_hdr, sym_hashes, |
2701 | 0 | h, sec, relocation, |
2702 | 0 | unresolved_reloc, warned, ignored); |
2703 | | /* Here means symbol isn't local symbol only and 'h != NULL'. */ |
2704 | | |
2705 | | /* The 'unresolved_syms_in_objects' specify how to deal with undefined |
2706 | | symbol. And 'dynamic_undefined_weak' specify what to do when |
2707 | | meeting undefweak. */ |
2708 | | |
2709 | 0 | if ((is_undefweak = h->root.type == bfd_link_hash_undefweak)) |
2710 | 0 | { |
2711 | 0 | defined_local = false; |
2712 | 0 | resolved_local = false; |
2713 | 0 | resolved_to_const = (!is_dyn || h->dynindx == -1 |
2714 | 0 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); |
2715 | 0 | resolved_dynly = !resolved_local && !resolved_to_const; |
2716 | 0 | } |
2717 | 0 | else if (warned) |
2718 | 0 | { |
2719 | | /* Symbol undefined offen means failed already. I don't know why |
2720 | | 'warned' here but I guess it want to continue relocating as if |
2721 | | no error occures to find other errors as more as possible. */ |
2722 | | |
2723 | | /* To avoid generating warning messages about truncated |
2724 | | relocations, set the relocation's address to be the same as |
2725 | | the start of this section. */ |
2726 | 0 | relocation = (input_section->output_section |
2727 | 0 | ? input_section->output_section->vma |
2728 | 0 | : 0); |
2729 | |
|
2730 | 0 | defined_local = relocation != 0; |
2731 | 0 | resolved_local = defined_local; |
2732 | 0 | resolved_to_const = !resolved_local; |
2733 | 0 | resolved_dynly = false; |
2734 | 0 | } |
2735 | 0 | else |
2736 | 0 | { |
2737 | 0 | defined_local = !unresolved_reloc && !ignored; |
2738 | 0 | resolved_local = |
2739 | 0 | defined_local && SYMBOL_REFERENCES_LOCAL (info, h); |
2740 | 0 | resolved_dynly = !resolved_local; |
2741 | 0 | resolved_to_const = !resolved_local && !resolved_dynly; |
2742 | 0 | } |
2743 | 0 | } |
2744 | | |
2745 | 0 | name = loongarch_sym_name (input_bfd, h, sym); |
2746 | |
|
2747 | 0 | if (sec != NULL && discarded_section (sec)) |
2748 | 0 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, rel, |
2749 | 0 | 1, relend, howto, 0, contents); |
2750 | |
|
2751 | 0 | if (bfd_link_relocatable (info)) |
2752 | 0 | continue; |
2753 | | |
2754 | | /* The r_symndx will be STN_UNDEF (zero) only for relocs against symbols |
2755 | | from removed linkonce sections, or sections discarded by a linker |
2756 | | script. Also for R_*_SOP_PUSH_ABSOLUTE and PCREL to specify const. */ |
2757 | 0 | if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) |
2758 | 0 | { |
2759 | 0 | defined_local = false; |
2760 | 0 | resolved_local = false; |
2761 | 0 | resolved_dynly = false; |
2762 | 0 | resolved_to_const = true; |
2763 | 0 | } |
2764 | | |
2765 | | /* The ifunc reference generate plt. */ |
2766 | 0 | if (h && h->type == STT_GNU_IFUNC && h->plt.offset != MINUS_ONE) |
2767 | 0 | { |
2768 | 0 | defined_local = true; |
2769 | 0 | resolved_local = true; |
2770 | 0 | resolved_dynly = false; |
2771 | 0 | resolved_to_const = false; |
2772 | 0 | relocation = sec_addr (plt) + h->plt.offset; |
2773 | 0 | } |
2774 | |
|
2775 | 0 | unresolved_reloc = resolved_dynly; |
2776 | |
|
2777 | 0 | BFD_ASSERT (resolved_local + resolved_dynly + resolved_to_const == 1); |
2778 | | |
2779 | | /* BFD_ASSERT (!resolved_dynly || (h && h->dynindx != -1));. */ |
2780 | |
|
2781 | 0 | BFD_ASSERT (!resolved_local || defined_local); |
2782 | |
|
2783 | 0 | is_desc = false; |
2784 | 0 | is_ie = false; |
2785 | 0 | switch (r_type) |
2786 | 0 | { |
2787 | 0 | case R_LARCH_MARK_PCREL: |
2788 | 0 | case R_LARCH_MARK_LA: |
2789 | 0 | case R_LARCH_NONE: |
2790 | 0 | r = bfd_reloc_continue; |
2791 | 0 | unresolved_reloc = false; |
2792 | 0 | break; |
2793 | | |
2794 | 0 | case R_LARCH_32: |
2795 | 0 | case R_LARCH_64: |
2796 | 0 | if (resolved_dynly || (is_pic && resolved_local)) |
2797 | 0 | { |
2798 | 0 | Elf_Internal_Rela outrel; |
2799 | | |
2800 | | /* When generating a shared object, these relocations are copied |
2801 | | into the output file to be resolved at run time. */ |
2802 | |
|
2803 | 0 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, |
2804 | 0 | input_section, |
2805 | 0 | rel->r_offset); |
2806 | |
|
2807 | 0 | unresolved_reloc = (!((bfd_vma) -2 <= outrel.r_offset) |
2808 | 0 | && (input_section->flags & SEC_ALLOC)); |
2809 | |
|
2810 | 0 | outrel.r_offset += sec_addr (input_section); |
2811 | | |
2812 | | /* A pointer point to a ifunc symbol. */ |
2813 | 0 | if (h && h->type == STT_GNU_IFUNC) |
2814 | 0 | { |
2815 | 0 | if (h->dynindx == -1) |
2816 | 0 | { |
2817 | 0 | outrel.r_info = ELF64_R_INFO (0, R_LARCH_IRELATIVE); |
2818 | 0 | outrel.r_addend = (h->root.u.def.value |
2819 | 0 | + h->root.u.def.section->output_section->vma |
2820 | 0 | + h->root.u.def.section->output_offset); |
2821 | 0 | } |
2822 | 0 | else |
2823 | 0 | { |
2824 | 0 | outrel.r_info = ELF64_R_INFO (h->dynindx, R_LARCH_64); |
2825 | 0 | outrel.r_addend = 0; |
2826 | 0 | } |
2827 | |
|
2828 | 0 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
2829 | 0 | { |
2830 | |
|
2831 | 0 | if (htab->elf.splt != NULL) |
2832 | 0 | sreloc = htab->elf.srelgot; |
2833 | 0 | else |
2834 | 0 | sreloc = htab->elf.irelplt; |
2835 | 0 | } |
2836 | 0 | else |
2837 | 0 | { |
2838 | |
|
2839 | 0 | if (bfd_link_pic (info)) |
2840 | 0 | sreloc = htab->elf.irelifunc; |
2841 | 0 | else if (htab->elf.splt != NULL) |
2842 | 0 | sreloc = htab->elf.srelgot; |
2843 | 0 | else |
2844 | 0 | sreloc = htab->elf.irelplt; |
2845 | 0 | } |
2846 | 0 | } |
2847 | 0 | else if (resolved_dynly) |
2848 | 0 | { |
2849 | 0 | if (h->dynindx == -1) |
2850 | 0 | outrel.r_info = ELF64_R_INFO (0, r_type); |
2851 | 0 | else |
2852 | 0 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
2853 | |
|
2854 | 0 | outrel.r_addend = rel->r_addend; |
2855 | 0 | } |
2856 | 0 | else |
2857 | 0 | { |
2858 | 0 | outrel.r_info = ELF64_R_INFO (0, R_LARCH_RELATIVE); |
2859 | 0 | outrel.r_addend = relocation + rel->r_addend; |
2860 | 0 | } |
2861 | | |
2862 | | /* No alloc space of func allocate_dynrelocs. */ |
2863 | 0 | if (unresolved_reloc |
2864 | 0 | && !(h && (h->is_weakalias || !h->dyn_relocs))) |
2865 | 0 | loongarch_elf_append_rela (output_bfd, sreloc, &outrel); |
2866 | 0 | } |
2867 | |
|
2868 | 0 | relocation += rel->r_addend; |
2869 | 0 | break; |
2870 | | |
2871 | 0 | case R_LARCH_ADD6: |
2872 | 0 | case R_LARCH_ADD8: |
2873 | 0 | case R_LARCH_ADD16: |
2874 | 0 | case R_LARCH_ADD24: |
2875 | 0 | case R_LARCH_ADD32: |
2876 | 0 | case R_LARCH_ADD64: |
2877 | 0 | { |
2878 | 0 | bfd_vma old_value = bfd_get (howto->bitsize, input_bfd, |
2879 | 0 | contents + rel->r_offset); |
2880 | 0 | relocation = old_value + relocation + rel->r_addend; |
2881 | 0 | break; |
2882 | 0 | } |
2883 | | |
2884 | 0 | case R_LARCH_SUB6: |
2885 | 0 | case R_LARCH_SUB8: |
2886 | 0 | case R_LARCH_SUB16: |
2887 | 0 | case R_LARCH_SUB24: |
2888 | 0 | case R_LARCH_SUB32: |
2889 | 0 | case R_LARCH_SUB64: |
2890 | 0 | { |
2891 | 0 | bfd_vma old_value = bfd_get (howto->bitsize, input_bfd, |
2892 | 0 | contents + rel->r_offset); |
2893 | 0 | relocation = old_value - relocation - rel->r_addend; |
2894 | 0 | break; |
2895 | 0 | } |
2896 | | |
2897 | 0 | case R_LARCH_ADD_ULEB128: |
2898 | 0 | case R_LARCH_SUB_ULEB128: |
2899 | 0 | { |
2900 | | /* Get the value and length of the uleb128 data. */ |
2901 | 0 | unsigned int len = 0; |
2902 | 0 | bfd_vma old_value = _bfd_read_unsigned_leb128 (input_bfd, |
2903 | 0 | contents + rel->r_offset, &len); |
2904 | |
|
2905 | 0 | if (R_LARCH_ADD_ULEB128 == ELF64_R_TYPE (rel->r_info)) |
2906 | 0 | relocation = old_value + relocation + rel->r_addend; |
2907 | 0 | else if (R_LARCH_SUB_ULEB128 == ELF64_R_TYPE (rel->r_info)) |
2908 | 0 | relocation = old_value - relocation - rel->r_addend; |
2909 | |
|
2910 | 0 | bfd_vma mask = (1 << (7 * len)) - 1; |
2911 | 0 | relocation &= mask; |
2912 | 0 | break; |
2913 | 0 | } |
2914 | | |
2915 | 0 | case R_LARCH_TLS_DTPREL32: |
2916 | 0 | case R_LARCH_TLS_DTPREL64: |
2917 | 0 | if (resolved_dynly) |
2918 | 0 | { |
2919 | 0 | Elf_Internal_Rela outrel; |
2920 | |
|
2921 | 0 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, |
2922 | 0 | input_section, |
2923 | 0 | rel->r_offset); |
2924 | 0 | unresolved_reloc = (!((bfd_vma) -2 <= outrel.r_offset) |
2925 | 0 | && (input_section->flags & SEC_ALLOC)); |
2926 | 0 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
2927 | 0 | outrel.r_offset += sec_addr (input_section); |
2928 | 0 | outrel.r_addend = rel->r_addend; |
2929 | 0 | if (unresolved_reloc) |
2930 | 0 | loongarch_elf_append_rela (output_bfd, sreloc, &outrel); |
2931 | 0 | break; |
2932 | 0 | } |
2933 | | |
2934 | 0 | if (resolved_to_const) |
2935 | 0 | fatal = loongarch_reloc_is_fatal (info, input_bfd, input_section, |
2936 | 0 | rel, howto, |
2937 | 0 | bfd_reloc_notsupported, |
2938 | 0 | is_undefweak, name, |
2939 | 0 | "Internal:"); |
2940 | 0 | if (resolved_local) |
2941 | 0 | { |
2942 | 0 | if (!elf_hash_table (info)->tls_sec) |
2943 | 0 | { |
2944 | 0 | fatal = loongarch_reloc_is_fatal (info, input_bfd, |
2945 | 0 | input_section, rel, howto, bfd_reloc_notsupported, |
2946 | 0 | is_undefweak, name, "TLS section not be created"); |
2947 | 0 | } |
2948 | 0 | else |
2949 | 0 | relocation = tlsoff (info, relocation); |
2950 | 0 | } |
2951 | 0 | else |
2952 | 0 | { |
2953 | 0 | fatal = loongarch_reloc_is_fatal (info, input_bfd, |
2954 | 0 | input_section, rel, howto, bfd_reloc_undefined, |
2955 | 0 | is_undefweak, name, |
2956 | 0 | "TLS LE just can be resolved local only."); |
2957 | 0 | } |
2958 | |
|
2959 | 0 | break; |
2960 | | |
2961 | 0 | case R_LARCH_SOP_PUSH_TLS_TPREL: |
2962 | 0 | if (resolved_local) |
2963 | 0 | { |
2964 | 0 | if (!elf_hash_table (info)->tls_sec) |
2965 | 0 | fatal = (loongarch_reloc_is_fatal |
2966 | 0 | (info, input_bfd, input_section, rel, howto, |
2967 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
2968 | 0 | "TLS section not be created")); |
2969 | 0 | else |
2970 | 0 | relocation -= elf_hash_table (info)->tls_sec->vma; |
2971 | 0 | } |
2972 | 0 | else |
2973 | 0 | fatal = (loongarch_reloc_is_fatal |
2974 | 0 | (info, input_bfd, input_section, rel, howto, |
2975 | 0 | bfd_reloc_undefined, is_undefweak, name, |
2976 | 0 | "TLS LE just can be resolved local only.")); |
2977 | 0 | break; |
2978 | | |
2979 | 0 | case R_LARCH_SOP_PUSH_ABSOLUTE: |
2980 | 0 | if (is_undefweak) |
2981 | 0 | { |
2982 | 0 | if (resolved_dynly) |
2983 | 0 | fatal = (loongarch_reloc_is_fatal |
2984 | 0 | (info, input_bfd, input_section, rel, howto, |
2985 | 0 | bfd_reloc_dangerous, is_undefweak, name, |
2986 | 0 | "Someone require us to resolve undefweak " |
2987 | 0 | "symbol dynamically. \n" |
2988 | 0 | "But this reloc can't be done. " |
2989 | 0 | "I think I can't throw error " |
2990 | 0 | "for this\n" |
2991 | 0 | "so I resolved it to 0. " |
2992 | 0 | "I suggest to re-compile with '-fpic'.")); |
2993 | |
|
2994 | 0 | relocation = 0; |
2995 | 0 | unresolved_reloc = false; |
2996 | 0 | break; |
2997 | 0 | } |
2998 | | |
2999 | 0 | if (resolved_to_const) |
3000 | 0 | { |
3001 | 0 | relocation += rel->r_addend; |
3002 | 0 | break; |
3003 | 0 | } |
3004 | | |
3005 | 0 | if (is_pic) |
3006 | 0 | { |
3007 | 0 | fatal = (loongarch_reloc_is_fatal |
3008 | 0 | (info, input_bfd, input_section, rel, howto, |
3009 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3010 | 0 | "Under PIC we don't know load address. Re-compile " |
3011 | 0 | "with '-fpic'?")); |
3012 | 0 | break; |
3013 | 0 | } |
3014 | | |
3015 | 0 | if (resolved_dynly) |
3016 | 0 | { |
3017 | 0 | if (!(plt && h && h->plt.offset != MINUS_ONE)) |
3018 | 0 | { |
3019 | 0 | fatal = (loongarch_reloc_is_fatal |
3020 | 0 | (info, input_bfd, input_section, rel, howto, |
3021 | 0 | bfd_reloc_undefined, is_undefweak, name, |
3022 | 0 | "Can't be resolved dynamically. Try to re-compile " |
3023 | 0 | "with '-fpic'?")); |
3024 | 0 | break; |
3025 | 0 | } |
3026 | | |
3027 | 0 | if (rel->r_addend != 0) |
3028 | 0 | { |
3029 | 0 | fatal = (loongarch_reloc_is_fatal |
3030 | 0 | (info, input_bfd, input_section, rel, howto, |
3031 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3032 | 0 | "Shouldn't be with r_addend.")); |
3033 | 0 | break; |
3034 | 0 | } |
3035 | | |
3036 | 0 | relocation = sec_addr (plt) + h->plt.offset; |
3037 | 0 | unresolved_reloc = false; |
3038 | 0 | break; |
3039 | 0 | } |
3040 | | |
3041 | 0 | if (resolved_local) |
3042 | 0 | { |
3043 | 0 | relocation += rel->r_addend; |
3044 | 0 | break; |
3045 | 0 | } |
3046 | | |
3047 | 0 | break; |
3048 | | |
3049 | 0 | case R_LARCH_SOP_PUSH_PCREL: |
3050 | 0 | case R_LARCH_SOP_PUSH_PLT_PCREL: |
3051 | 0 | unresolved_reloc = false; |
3052 | |
|
3053 | 0 | if (is_undefweak) |
3054 | 0 | { |
3055 | 0 | i = 0, j = 0; |
3056 | 0 | relocation = 0; |
3057 | 0 | if (resolved_dynly) |
3058 | 0 | { |
3059 | 0 | if (h && h->plt.offset != MINUS_ONE) |
3060 | 0 | i = 1, j = 2; |
3061 | 0 | else |
3062 | 0 | fatal = (loongarch_reloc_is_fatal |
3063 | 0 | (info, input_bfd, input_section, rel, howto, |
3064 | 0 | bfd_reloc_dangerous, is_undefweak, name, |
3065 | 0 | "Undefweak need to be resolved dynamically, " |
3066 | 0 | "but PLT stub doesn't represent.")); |
3067 | 0 | } |
3068 | 0 | } |
3069 | 0 | else |
3070 | 0 | { |
3071 | 0 | if (!(defined_local || (h && h->plt.offset != MINUS_ONE))) |
3072 | 0 | { |
3073 | 0 | fatal = (loongarch_reloc_is_fatal |
3074 | 0 | (info, input_bfd, input_section, rel, howto, |
3075 | 0 | bfd_reloc_undefined, is_undefweak, name, |
3076 | 0 | "PLT stub does not represent and " |
3077 | 0 | "symbol not defined.")); |
3078 | 0 | break; |
3079 | 0 | } |
3080 | | |
3081 | 0 | if (resolved_local) |
3082 | 0 | i = 0, j = 2; |
3083 | 0 | else /* if (resolved_dynly) */ |
3084 | 0 | { |
3085 | 0 | if (!(h && h->plt.offset != MINUS_ONE)) |
3086 | 0 | fatal = (loongarch_reloc_is_fatal |
3087 | 0 | (info, input_bfd, input_section, rel, howto, |
3088 | 0 | bfd_reloc_dangerous, is_undefweak, name, |
3089 | 0 | "Internal: PLT stub doesn't represent. " |
3090 | 0 | "Resolve it with pcrel")); |
3091 | 0 | i = 1, j = 3; |
3092 | 0 | } |
3093 | 0 | } |
3094 | | |
3095 | 0 | for (; i < j; i++) |
3096 | 0 | { |
3097 | 0 | if ((i & 1) == 0 && defined_local) |
3098 | 0 | { |
3099 | 0 | relocation -= pc; |
3100 | 0 | relocation += rel->r_addend; |
3101 | 0 | break; |
3102 | 0 | } |
3103 | | |
3104 | 0 | if ((i & 1) && h && h->plt.offset != MINUS_ONE) |
3105 | 0 | { |
3106 | 0 | if (rel->r_addend != 0) |
3107 | 0 | { |
3108 | 0 | fatal = (loongarch_reloc_is_fatal |
3109 | 0 | (info, input_bfd, input_section, rel, howto, |
3110 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3111 | 0 | "PLT shouldn't be with r_addend.")); |
3112 | 0 | break; |
3113 | 0 | } |
3114 | 0 | relocation = sec_addr (plt) + h->plt.offset - pc; |
3115 | 0 | break; |
3116 | 0 | } |
3117 | 0 | } |
3118 | 0 | break; |
3119 | | |
3120 | 0 | case R_LARCH_SOP_PUSH_GPREL: |
3121 | 0 | unresolved_reloc = false; |
3122 | |
|
3123 | 0 | if (rel->r_addend != 0) |
3124 | 0 | { |
3125 | 0 | fatal = (loongarch_reloc_is_fatal |
3126 | 0 | (info, input_bfd, input_section, rel, howto, |
3127 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3128 | 0 | "Shouldn't be with r_addend.")); |
3129 | 0 | break; |
3130 | 0 | } |
3131 | | |
3132 | 0 | if (h != NULL) |
3133 | 0 | { |
3134 | 0 | off = h->got.offset & (~1); |
3135 | |
|
3136 | 0 | if (h->got.offset == MINUS_ONE && h->type != STT_GNU_IFUNC) |
3137 | 0 | { |
3138 | 0 | fatal = (loongarch_reloc_is_fatal |
3139 | 0 | (info, input_bfd, input_section, rel, howto, |
3140 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3141 | 0 | "Internal: GOT entry doesn't represent.")); |
3142 | 0 | break; |
3143 | 0 | } |
3144 | | |
3145 | | /* Hidden symbol not has .got entry, only .got.plt entry |
3146 | | so gprel is (plt - got). */ |
3147 | 0 | if (h->got.offset == MINUS_ONE && h->type == STT_GNU_IFUNC) |
3148 | 0 | { |
3149 | 0 | if (h->plt.offset == (bfd_vma) -1) |
3150 | 0 | { |
3151 | 0 | abort(); |
3152 | 0 | } |
3153 | | |
3154 | 0 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
3155 | 0 | off = plt_index * GOT_ENTRY_SIZE; |
3156 | |
|
3157 | 0 | if (htab->elf.splt != NULL) |
3158 | 0 | { |
3159 | | /* Section .plt header is 2 times of plt entry. */ |
3160 | 0 | off = sec_addr (htab->elf.sgotplt) + off |
3161 | 0 | - sec_addr (htab->elf.sgot); |
3162 | 0 | } |
3163 | 0 | else |
3164 | 0 | { |
3165 | | /* Section iplt not has plt header. */ |
3166 | 0 | off = sec_addr (htab->elf.igotplt) + off |
3167 | 0 | - sec_addr (htab->elf.sgot); |
3168 | 0 | } |
3169 | 0 | } |
3170 | | |
3171 | 0 | if ((h->got.offset & 1) == 0) |
3172 | 0 | { |
3173 | 0 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (is_dyn, |
3174 | 0 | bfd_link_pic (info), h) |
3175 | 0 | && ((bfd_link_pic (info) |
3176 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h)))) |
3177 | 0 | { |
3178 | | /* This is actually a static link, or it is a |
3179 | | -Bsymbolic link and the symbol is defined |
3180 | | locally, or the symbol was forced to be local |
3181 | | because of a version file. We must initialize |
3182 | | this entry in the global offset table. Since the |
3183 | | offset must always be a multiple of the word size, |
3184 | | we use the least significant bit to record whether |
3185 | | we have initialized it already. |
3186 | | |
3187 | | When doing a dynamic link, we create a rela.got |
3188 | | relocation entry to initialize the value. This |
3189 | | is done in the finish_dynamic_symbol routine. */ |
3190 | |
|
3191 | 0 | if (resolved_dynly) |
3192 | 0 | { |
3193 | 0 | fatal = (loongarch_reloc_is_fatal |
3194 | 0 | (info, input_bfd, input_section, rel, howto, |
3195 | 0 | bfd_reloc_dangerous, is_undefweak, name, |
3196 | 0 | "Internal: here shouldn't dynamic.")); |
3197 | 0 | } |
3198 | |
|
3199 | 0 | if (!(defined_local || resolved_to_const)) |
3200 | 0 | { |
3201 | 0 | fatal = (loongarch_reloc_is_fatal |
3202 | 0 | (info, input_bfd, input_section, rel, howto, |
3203 | 0 | bfd_reloc_undefined, is_undefweak, name, |
3204 | 0 | "Internal: ")); |
3205 | 0 | break; |
3206 | 0 | } |
3207 | | |
3208 | 0 | asection *s; |
3209 | 0 | Elf_Internal_Rela outrel; |
3210 | | /* We need to generate a R_LARCH_RELATIVE reloc |
3211 | | for the dynamic linker. */ |
3212 | 0 | s = htab->elf.srelgot; |
3213 | 0 | if (!s) |
3214 | 0 | { |
3215 | 0 | fatal = loongarch_reloc_is_fatal |
3216 | 0 | (info, input_bfd, |
3217 | 0 | input_section, rel, howto, |
3218 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3219 | 0 | "Internal: '.rel.got' not represent"); |
3220 | 0 | break; |
3221 | 0 | } |
3222 | | |
3223 | 0 | outrel.r_offset = sec_addr (got) + off; |
3224 | 0 | outrel.r_info = ELF64_R_INFO (0, R_LARCH_RELATIVE); |
3225 | 0 | outrel.r_addend = relocation; /* Link-time addr. */ |
3226 | 0 | loongarch_elf_append_rela (output_bfd, s, &outrel); |
3227 | 0 | } |
3228 | 0 | bfd_put_64 (output_bfd, relocation, got->contents + off); |
3229 | 0 | h->got.offset |= 1; |
3230 | 0 | } |
3231 | 0 | } |
3232 | 0 | else |
3233 | 0 | { |
3234 | 0 | if (!local_got_offsets) |
3235 | 0 | { |
3236 | 0 | fatal = (loongarch_reloc_is_fatal |
3237 | 0 | (info, input_bfd, input_section, rel, howto, |
3238 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3239 | 0 | "Internal: local got offsets not reporesent.")); |
3240 | 0 | break; |
3241 | 0 | } |
3242 | | |
3243 | 0 | off = local_got_offsets[r_symndx] & (~1); |
3244 | |
|
3245 | 0 | if (local_got_offsets[r_symndx] == MINUS_ONE) |
3246 | 0 | { |
3247 | 0 | fatal = (loongarch_reloc_is_fatal |
3248 | 0 | (info, input_bfd, input_section, rel, howto, |
3249 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3250 | 0 | "Internal: GOT entry doesn't represent.")); |
3251 | 0 | break; |
3252 | 0 | } |
3253 | | |
3254 | | /* The offset must always be a multiple of the word size. |
3255 | | So, we can use the least significant bit to record |
3256 | | whether we have already processed this entry. */ |
3257 | 0 | if ((local_got_offsets[r_symndx] & 1) == 0) |
3258 | 0 | { |
3259 | 0 | if (is_pic) |
3260 | 0 | { |
3261 | 0 | asection *s; |
3262 | 0 | Elf_Internal_Rela outrel; |
3263 | | /* We need to generate a R_LARCH_RELATIVE reloc |
3264 | | for the dynamic linker. */ |
3265 | 0 | s = htab->elf.srelgot; |
3266 | 0 | if (!s) |
3267 | 0 | { |
3268 | 0 | fatal = (loongarch_reloc_is_fatal |
3269 | 0 | (info, input_bfd, input_section, rel, howto, |
3270 | 0 | bfd_reloc_notsupported, is_undefweak, name, |
3271 | 0 | "Internal: '.rel.got' not represent")); |
3272 | 0 | break; |
3273 | 0 | } |
3274 | | |
3275 | 0 | outrel.r_offset = sec_addr (got) + off; |
3276 | 0 | outrel.r_info = ELF64_R_INFO (0, R_LARCH_RELATIVE); |
3277 | 0 | outrel.r_addend = relocation; /* Link-time addr. */ |
3278 | 0 | loongarch_elf_append_rela (output_bfd, s, &outrel); |
3279 | 0 | } |
3280 | | |
3281 | 0 | bfd_put_64 (output_bfd, relocation, got->contents + off); |
3282 | 0 | local_got_offsets[r_symndx] |= 1; |
3283 | 0 | } |
3284 | 0 | } |
3285 | 0 | relocation = off; |
3286 | |
|
3287 | 0 | break; |
3288 | | |
3289 | 0 | case R_LARCH_SOP_PUSH_TLS_GOT: |
3290 | 0 | case R_LARCH_SOP_PUSH_TLS_GD: |
3291 | 0 | { |
3292 | 0 | unresolved_reloc = false; |
3293 | 0 | if (r_type == R_LARCH_SOP_PUSH_TLS_GOT) |
3294 | 0 | is_ie = true; |
3295 | |
|
3296 | 0 | bfd_vma got_off = 0; |
3297 | 0 | if (h != NULL) |
3298 | 0 | { |
3299 | 0 | got_off = h->got.offset; |
3300 | 0 | h->got.offset |= 1; |
3301 | 0 | } |
3302 | 0 | else |
3303 | 0 | { |
3304 | 0 | got_off = local_got_offsets[r_symndx]; |
3305 | 0 | local_got_offsets[r_symndx] |= 1; |
3306 | 0 | } |
3307 | |
|
3308 | 0 | BFD_ASSERT (got_off != MINUS_ONE); |
3309 | |
|
3310 | 0 | ie_off = 0; |
3311 | 0 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); |
3312 | 0 | if ((tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_IE)) |
3313 | 0 | ie_off = 2 * GOT_ENTRY_SIZE; |
3314 | |
|
3315 | 0 | if ((got_off & 1) == 0) |
3316 | 0 | { |
3317 | 0 | Elf_Internal_Rela rela; |
3318 | 0 | asection *srel = htab->elf.srelgot; |
3319 | 0 | bfd_vma tls_block_off = 0; |
3320 | |
|
3321 | 0 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
3322 | 0 | { |
3323 | 0 | BFD_ASSERT (elf_hash_table (info)->tls_sec); |
3324 | 0 | tls_block_off = relocation |
3325 | 0 | - elf_hash_table (info)->tls_sec->vma; |
3326 | 0 | } |
3327 | |
|
3328 | 0 | if (tls_type & GOT_TLS_GD) |
3329 | 0 | { |
3330 | 0 | rela.r_offset = sec_addr (got) + got_off; |
3331 | 0 | rela.r_addend = 0; |
3332 | 0 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
3333 | 0 | { |
3334 | | /* Local sym, used in exec, set module id 1. */ |
3335 | 0 | if (bfd_link_executable (info)) |
3336 | 0 | bfd_put_64 (output_bfd, 1, got->contents + got_off); |
3337 | 0 | else |
3338 | 0 | { |
3339 | 0 | rela.r_info = ELF64_R_INFO (0, |
3340 | 0 | R_LARCH_TLS_DTPMOD64); |
3341 | 0 | loongarch_elf_append_rela (output_bfd, srel, &rela); |
3342 | 0 | } |
3343 | |
|
3344 | 0 | bfd_put_64 (output_bfd, tls_block_off, |
3345 | 0 | got->contents + got_off + GOT_ENTRY_SIZE); |
3346 | 0 | } |
3347 | | /* Dynamic resolved. */ |
3348 | 0 | else |
3349 | 0 | { |
3350 | | /* Dynamic relocate module id. */ |
3351 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, |
3352 | 0 | R_LARCH_TLS_DTPMOD64); |
3353 | 0 | loongarch_elf_append_rela (output_bfd, srel, &rela); |
3354 | | |
3355 | | /* Dynamic relocate offset of block. */ |
3356 | 0 | rela.r_offset += GOT_ENTRY_SIZE; |
3357 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, |
3358 | 0 | R_LARCH_TLS_DTPREL64); |
3359 | 0 | loongarch_elf_append_rela (output_bfd, srel, &rela); |
3360 | 0 | } |
3361 | 0 | } |
3362 | 0 | if (tls_type & GOT_TLS_IE) |
3363 | 0 | { |
3364 | 0 | rela.r_offset = sec_addr (got) + got_off + ie_off; |
3365 | 0 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
3366 | 0 | { |
3367 | | /* Local sym, used in exec, set module id 1. */ |
3368 | 0 | if (!bfd_link_executable (info)) |
3369 | 0 | { |
3370 | 0 | rela.r_info = ELF64_R_INFO (0, R_LARCH_TLS_TPREL64); |
3371 | 0 | rela.r_addend = tls_block_off; |
3372 | 0 | loongarch_elf_append_rela (output_bfd, srel, &rela); |
3373 | 0 | } |
3374 | |
|
3375 | 0 | bfd_put_64 (output_bfd, tls_block_off, |
3376 | 0 | got->contents + got_off + ie_off); |
3377 | 0 | } |
3378 | | /* Dynamic resolved. */ |
3379 | 0 | else |
3380 | 0 | { |
3381 | | /* Dynamic relocate offset of block. */ |
3382 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, |
3383 | 0 | R_LARCH_TLS_TPREL64); |
3384 | 0 | rela.r_addend = 0; |
3385 | 0 | loongarch_elf_append_rela (output_bfd, srel, &rela); |
3386 | 0 | } |
3387 | 0 | } |
3388 | 0 | } |
3389 | |
|
3390 | 0 | relocation = (got_off & (~(bfd_vma)1)) + (is_ie ? ie_off : 0); |
3391 | 0 | } |
3392 | 0 | break; |
3393 | | |
3394 | | /* New reloc types. */ |
3395 | 0 | case R_LARCH_B16: |
3396 | 0 | case R_LARCH_B21: |
3397 | 0 | case R_LARCH_B26: |
3398 | 0 | case R_LARCH_CALL36: |
3399 | 0 | unresolved_reloc = false; |
3400 | 0 | if (is_undefweak) |
3401 | 0 | { |
3402 | 0 | relocation = 0; |
3403 | 0 | } |
3404 | |
|
3405 | 0 | if (resolved_local) |
3406 | 0 | { |
3407 | 0 | relocation -= pc; |
3408 | 0 | relocation += rel->r_addend; |
3409 | 0 | } |
3410 | 0 | else if (resolved_dynly) |
3411 | 0 | { |
3412 | 0 | BFD_ASSERT (h |
3413 | 0 | && (h->plt.offset != MINUS_ONE |
3414 | 0 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
3415 | 0 | && rel->r_addend == 0); |
3416 | 0 | if (h && h->plt.offset == MINUS_ONE |
3417 | 0 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
3418 | 0 | { |
3419 | 0 | relocation -= pc; |
3420 | 0 | relocation += rel->r_addend; |
3421 | 0 | } |
3422 | 0 | else |
3423 | 0 | relocation = sec_addr (plt) + h->plt.offset - pc; |
3424 | 0 | } |
3425 | |
|
3426 | 0 | break; |
3427 | | |
3428 | 0 | case R_LARCH_ABS_HI20: |
3429 | 0 | case R_LARCH_ABS_LO12: |
3430 | 0 | case R_LARCH_ABS64_LO20: |
3431 | 0 | case R_LARCH_ABS64_HI12: |
3432 | |
|
3433 | 0 | if (is_undefweak) |
3434 | 0 | { |
3435 | 0 | BFD_ASSERT (resolved_dynly); |
3436 | 0 | relocation = 0; |
3437 | 0 | break; |
3438 | 0 | } |
3439 | 0 | else if (resolved_to_const || resolved_local) |
3440 | 0 | { |
3441 | 0 | relocation += rel->r_addend; |
3442 | 0 | } |
3443 | 0 | else if (resolved_dynly) |
3444 | 0 | { |
3445 | 0 | unresolved_reloc = false; |
3446 | 0 | BFD_ASSERT ((plt && h && h->plt.offset != MINUS_ONE) |
3447 | 0 | && rel->r_addend == 0); |
3448 | 0 | relocation = sec_addr (plt) + h->plt.offset; |
3449 | 0 | } |
3450 | | |
3451 | 0 | break; |
3452 | | |
3453 | 0 | case R_LARCH_PCREL20_S2: |
3454 | 0 | unresolved_reloc = false; |
3455 | 0 | if (h && h->plt.offset != MINUS_ONE) |
3456 | 0 | relocation = sec_addr (plt) + h->plt.offset; |
3457 | 0 | else |
3458 | 0 | relocation += rel->r_addend; |
3459 | 0 | relocation -= pc; |
3460 | 0 | break; |
3461 | | |
3462 | 0 | case R_LARCH_PCALA_HI20: |
3463 | 0 | unresolved_reloc = false; |
3464 | 0 | if (h && h->plt.offset != MINUS_ONE) |
3465 | 0 | relocation = sec_addr (plt) + h->plt.offset; |
3466 | 0 | else |
3467 | 0 | relocation += rel->r_addend; |
3468 | |
|
3469 | 0 | RELOCATE_CALC_PC32_HI20 (relocation, pc); |
3470 | 0 | break; |
3471 | | |
3472 | 0 | case R_LARCH_TLS_LE_HI20_R: |
3473 | 0 | relocation += rel->r_addend; |
3474 | 0 | relocation = tlsoff (info, relocation); |
3475 | 0 | RELOCATE_TLS_TP32_HI20 (relocation); |
3476 | 0 | break; |
3477 | | |
3478 | 0 | case R_LARCH_PCALA_LO12: |
3479 | | /* Not support if sym_addr in 2k page edge. |
3480 | | pcalau12i pc_hi20 (sym_addr) |
3481 | | ld.w/d pc_lo12 (sym_addr) |
3482 | | ld.w/d pc_lo12 (sym_addr + x) |
3483 | | ... |
3484 | | can not calc correct address |
3485 | | if sym_addr < 0x800 && sym_addr + x >= 0x800. */ |
3486 | |
|
3487 | 0 | if (h && h->plt.offset != MINUS_ONE) |
3488 | 0 | relocation = sec_addr (plt) + h->plt.offset; |
3489 | 0 | else |
3490 | 0 | relocation += rel->r_addend; |
3491 | | |
3492 | | /* For 2G jump, generate pcalau12i, jirl. */ |
3493 | | /* If use jirl, turns to R_LARCH_B16. */ |
3494 | 0 | uint32_t insn = bfd_get (32, input_bfd, contents + rel->r_offset); |
3495 | 0 | if ((insn & 0x4c000000) == 0x4c000000) |
3496 | 0 | { |
3497 | 0 | relocation &= 0xfff; |
3498 | | /* Signed extend. */ |
3499 | 0 | relocation = (relocation ^ 0x800) - 0x800; |
3500 | |
|
3501 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, R_LARCH_B16); |
3502 | 0 | howto = loongarch_elf_rtype_to_howto (input_bfd, R_LARCH_B16); |
3503 | 0 | } |
3504 | 0 | break; |
3505 | | |
3506 | 0 | case R_LARCH_PCALA64_HI12: |
3507 | 0 | pc -= 4; |
3508 | | /* Fall through. */ |
3509 | 0 | case R_LARCH_PCALA64_LO20: |
3510 | 0 | if (h && h->plt.offset != MINUS_ONE) |
3511 | 0 | relocation = sec_addr (plt) + h->plt.offset; |
3512 | 0 | else |
3513 | 0 | relocation += rel->r_addend; |
3514 | |
|
3515 | 0 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); |
3516 | |
|
3517 | 0 | break; |
3518 | | |
3519 | 0 | case R_LARCH_GOT_PC_HI20: |
3520 | 0 | case R_LARCH_GOT_HI20: |
3521 | | /* Calc got offset. */ |
3522 | 0 | { |
3523 | 0 | unresolved_reloc = false; |
3524 | 0 | BFD_ASSERT (rel->r_addend == 0); |
3525 | |
|
3526 | 0 | bfd_vma got_off = 0; |
3527 | 0 | if (h != NULL) |
3528 | 0 | { |
3529 | | /* GOT ref or ifunc. */ |
3530 | 0 | BFD_ASSERT (h->got.offset != MINUS_ONE |
3531 | 0 | || h->type == STT_GNU_IFUNC); |
3532 | |
|
3533 | 0 | got_off = h->got.offset & (~(bfd_vma)1); |
3534 | | /* Hidden symbol not has got entry, |
3535 | | * only got.plt entry so it is (plt - got). */ |
3536 | 0 | if (h->got.offset == MINUS_ONE && h->type == STT_GNU_IFUNC) |
3537 | 0 | { |
3538 | 0 | bfd_vma idx; |
3539 | 0 | if (htab->elf.splt != NULL) |
3540 | 0 | { |
3541 | 0 | idx = (h->plt.offset - PLT_HEADER_SIZE) |
3542 | 0 | / PLT_ENTRY_SIZE; |
3543 | 0 | got_off = sec_addr (htab->elf.sgotplt) |
3544 | 0 | + GOTPLT_HEADER_SIZE |
3545 | 0 | + (idx * GOT_ENTRY_SIZE) |
3546 | 0 | - sec_addr (htab->elf.sgot); |
3547 | 0 | } |
3548 | 0 | else |
3549 | 0 | { |
3550 | 0 | idx = h->plt.offset / PLT_ENTRY_SIZE; |
3551 | 0 | got_off = sec_addr (htab->elf.sgotplt) |
3552 | 0 | + (idx * GOT_ENTRY_SIZE) |
3553 | 0 | - sec_addr (htab->elf.sgot); |
3554 | 0 | } |
3555 | 0 | } |
3556 | |
|
3557 | 0 | if ((h->got.offset & 1) == 0) |
3558 | 0 | { |
3559 | | /* We need to generate a R_LARCH_RELATIVE reloc once |
3560 | | * in loongarch_elf_finish_dynamic_symbol or now, |
3561 | | * call finish_dyn && nopic |
3562 | | * or !call finish_dyn && pic. */ |
3563 | 0 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (is_dyn, |
3564 | 0 | bfd_link_pic (info), |
3565 | 0 | h) |
3566 | 0 | && bfd_link_pic (info) |
3567 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
3568 | 0 | { |
3569 | 0 | Elf_Internal_Rela rela; |
3570 | 0 | rela.r_offset = sec_addr (got) + got_off; |
3571 | 0 | rela.r_info = ELF64_R_INFO (0, R_LARCH_RELATIVE); |
3572 | 0 | rela.r_addend = relocation; |
3573 | 0 | loongarch_elf_append_rela (output_bfd, |
3574 | 0 | htab->elf.srelgot, &rela); |
3575 | 0 | } |
3576 | 0 | h->got.offset |= 1; |
3577 | 0 | bfd_put_64 (output_bfd, relocation, |
3578 | 0 | got->contents + got_off); |
3579 | 0 | } |
3580 | 0 | } |
3581 | 0 | else |
3582 | 0 | { |
3583 | 0 | BFD_ASSERT (local_got_offsets |
3584 | 0 | && local_got_offsets[r_symndx] != MINUS_ONE); |
3585 | |
|
3586 | 0 | got_off = local_got_offsets[r_symndx] & (~(bfd_vma)1); |
3587 | 0 | if ((local_got_offsets[r_symndx] & 1) == 0) |
3588 | 0 | { |
3589 | 0 | if (bfd_link_pic (info)) |
3590 | 0 | { |
3591 | 0 | Elf_Internal_Rela rela; |
3592 | 0 | rela.r_offset = sec_addr (got) + got_off; |
3593 | 0 | rela.r_info = ELF64_R_INFO (0, R_LARCH_RELATIVE); |
3594 | 0 | rela.r_addend = relocation; |
3595 | 0 | loongarch_elf_append_rela (output_bfd, |
3596 | 0 | htab->elf.srelgot, &rela); |
3597 | 0 | } |
3598 | 0 | local_got_offsets[r_symndx] |= 1; |
3599 | 0 | } |
3600 | 0 | bfd_put_64 (output_bfd, relocation, got->contents + got_off); |
3601 | 0 | } |
3602 | |
|
3603 | 0 | relocation = got_off + sec_addr (got); |
3604 | 0 | } |
3605 | |
|
3606 | 0 | if (r_type == R_LARCH_GOT_PC_HI20) |
3607 | 0 | RELOCATE_CALC_PC32_HI20 (relocation, pc); |
3608 | |
|
3609 | 0 | break; |
3610 | | |
3611 | 0 | case R_LARCH_GOT_PC_LO12: |
3612 | 0 | case R_LARCH_GOT64_PC_LO20: |
3613 | 0 | case R_LARCH_GOT64_PC_HI12: |
3614 | 0 | case R_LARCH_GOT_LO12: |
3615 | 0 | case R_LARCH_GOT64_LO20: |
3616 | 0 | case R_LARCH_GOT64_HI12: |
3617 | 0 | { |
3618 | 0 | unresolved_reloc = false; |
3619 | 0 | bfd_vma got_off; |
3620 | 0 | if (h) |
3621 | 0 | got_off = h->got.offset & (~(bfd_vma)1); |
3622 | 0 | else |
3623 | 0 | got_off = local_got_offsets[r_symndx] & (~(bfd_vma)1); |
3624 | |
|
3625 | 0 | if (h && h->got.offset == MINUS_ONE && h->type == STT_GNU_IFUNC) |
3626 | 0 | { |
3627 | 0 | bfd_vma idx; |
3628 | 0 | if (htab->elf.splt != NULL) |
3629 | 0 | idx = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
3630 | 0 | else |
3631 | 0 | idx = h->plt.offset / PLT_ENTRY_SIZE; |
3632 | |
|
3633 | 0 | got_off = sec_addr (htab->elf.sgotplt) |
3634 | 0 | + GOTPLT_HEADER_SIZE |
3635 | 0 | + (idx * GOT_ENTRY_SIZE) |
3636 | 0 | - sec_addr (htab->elf.sgot); |
3637 | 0 | } |
3638 | |
|
3639 | 0 | relocation = got_off + sec_addr (got); |
3640 | 0 | } |
3641 | |
|
3642 | 0 | if (r_type == R_LARCH_GOT64_PC_HI12) |
3643 | 0 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 12); |
3644 | 0 | else if (r_type == R_LARCH_GOT64_PC_LO20) |
3645 | 0 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); |
3646 | |
|
3647 | 0 | break; |
3648 | | |
3649 | 0 | case R_LARCH_TLS_LE_HI20: |
3650 | 0 | case R_LARCH_TLS_LE_LO12: |
3651 | 0 | case R_LARCH_TLS_LE_LO12_R: |
3652 | 0 | case R_LARCH_TLS_LE64_LO20: |
3653 | 0 | case R_LARCH_TLS_LE64_HI12: |
3654 | 0 | BFD_ASSERT (resolved_local && elf_hash_table (info)->tls_sec); |
3655 | |
|
3656 | 0 | relocation += rel->r_addend; |
3657 | 0 | relocation = tlsoff (info, relocation); |
3658 | 0 | break; |
3659 | | |
3660 | | /* TLS IE LD/GD process separately is troublesome. |
3661 | | When a symbol is both ie and LD/GD, h->got.off |= 1 |
3662 | | make only one type be relocated. We must use |
3663 | | h->got.offset |= 1 and h->got.offset |= 2 |
3664 | | diff IE and LD/GD. And all (got_off & (~(bfd_vma)1)) |
3665 | | (IE LD/GD and reusable GOT reloc) must change to |
3666 | | (got_off & (~(bfd_vma)3)), beause we use lowest 2 bits |
3667 | | as a tag. |
3668 | | Now, LD and GD is both GOT_TLS_GD type, LD seems to |
3669 | | can be omitted. */ |
3670 | 0 | case R_LARCH_TLS_IE_PC_HI20: |
3671 | 0 | case R_LARCH_TLS_IE_HI20: |
3672 | 0 | case R_LARCH_TLS_LD_PC_HI20: |
3673 | 0 | case R_LARCH_TLS_LD_HI20: |
3674 | 0 | case R_LARCH_TLS_GD_PC_HI20: |
3675 | 0 | case R_LARCH_TLS_GD_HI20: |
3676 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
3677 | 0 | case R_LARCH_TLS_DESC_HI20: |
3678 | 0 | case R_LARCH_TLS_LD_PCREL20_S2: |
3679 | 0 | case R_LARCH_TLS_GD_PCREL20_S2: |
3680 | 0 | case R_LARCH_TLS_DESC_PCREL20_S2: |
3681 | 0 | BFD_ASSERT (rel->r_addend == 0); |
3682 | 0 | unresolved_reloc = false; |
3683 | |
|
3684 | 0 | if (r_type == R_LARCH_TLS_IE_PC_HI20 |
3685 | 0 | || r_type == R_LARCH_TLS_IE_HI20) |
3686 | 0 | is_ie = true; |
3687 | |
|
3688 | 0 | if (r_type == R_LARCH_TLS_DESC_PC_HI20 |
3689 | 0 | || r_type == R_LARCH_TLS_DESC_HI20 |
3690 | 0 | || r_type == R_LARCH_TLS_DESC_PCREL20_S2) |
3691 | 0 | is_desc = true; |
3692 | |
|
3693 | 0 | bfd_vma got_off = 0; |
3694 | 0 | if (h != NULL) |
3695 | 0 | { |
3696 | 0 | got_off = h->got.offset; |
3697 | 0 | h->got.offset |= 1; |
3698 | 0 | } |
3699 | 0 | else |
3700 | 0 | { |
3701 | 0 | got_off = local_got_offsets[r_symndx]; |
3702 | 0 | local_got_offsets[r_symndx] |= 1; |
3703 | 0 | } |
3704 | |
|
3705 | 0 | BFD_ASSERT (got_off != MINUS_ONE); |
3706 | |
|
3707 | 0 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); |
3708 | | |
3709 | | /* If a tls variable is accessed in multiple ways, GD uses |
3710 | | the first two slots of GOT, desc follows with two slots, |
3711 | | and IE uses one slot at the end. */ |
3712 | 0 | off = 0; |
3713 | 0 | if (tls_type & GOT_TLS_GD) |
3714 | 0 | off += 2 * GOT_ENTRY_SIZE; |
3715 | 0 | desc_off = off; |
3716 | 0 | if (tls_type & GOT_TLS_GDESC) |
3717 | 0 | off += 2 * GOT_ENTRY_SIZE; |
3718 | 0 | ie_off = off; |
3719 | |
|
3720 | 0 | if ((got_off & 1) == 0) |
3721 | 0 | { |
3722 | 0 | Elf_Internal_Rela rela; |
3723 | 0 | asection *relgot = htab->elf.srelgot; |
3724 | |
|
3725 | 0 | int indx = 0; |
3726 | 0 | bool need_reloc = false; |
3727 | 0 | LARCH_TLS_GD_IE_NEED_DYN_RELOC (info, is_dyn, h, indx, |
3728 | 0 | need_reloc); |
3729 | |
|
3730 | 0 | if (tls_type & GOT_TLS_GD) |
3731 | 0 | { |
3732 | 0 | if (need_reloc) |
3733 | 0 | { |
3734 | | /* Dynamic resolved Module ID. */ |
3735 | 0 | rela.r_offset = sec_addr (got) + got_off; |
3736 | 0 | rela.r_addend = 0; |
3737 | 0 | rela.r_info = ELF64_R_INFO (indx,R_LARCH_TLS_DTPMOD64); |
3738 | 0 | bfd_put_64 (output_bfd, 0, got->contents + got_off); |
3739 | 0 | loongarch_elf_append_rela (output_bfd, relgot, &rela); |
3740 | |
|
3741 | 0 | if (indx == 0) |
3742 | 0 | { |
3743 | | /* Local symbol, tp offset has been known. */ |
3744 | 0 | BFD_ASSERT (! unresolved_reloc); |
3745 | 0 | bfd_put_64 (output_bfd, |
3746 | 0 | tlsoff (info, relocation), |
3747 | 0 | (got->contents + got_off + GOT_ENTRY_SIZE)); |
3748 | 0 | } |
3749 | 0 | else |
3750 | 0 | { |
3751 | | /* Dynamic resolved block offset. */ |
3752 | 0 | bfd_put_64 (output_bfd, 0, |
3753 | 0 | got->contents + got_off + GOT_ENTRY_SIZE); |
3754 | 0 | rela.r_info = ELF64_R_INFO (indx, |
3755 | 0 | R_LARCH_TLS_DTPREL64); |
3756 | 0 | rela.r_offset += GOT_ENTRY_SIZE; |
3757 | 0 | loongarch_elf_append_rela (output_bfd, relgot, &rela); |
3758 | 0 | } |
3759 | 0 | } |
3760 | 0 | else |
3761 | 0 | { |
3762 | | /* In a static link or an executable link with the symbol |
3763 | | binding locally. Mark it as belonging to module 1. */ |
3764 | 0 | bfd_put_64 (output_bfd, 1, got->contents + got_off); |
3765 | 0 | bfd_put_64 (output_bfd, tlsoff (info, relocation), |
3766 | 0 | got->contents + got_off + GOT_ENTRY_SIZE); |
3767 | 0 | } |
3768 | 0 | } |
3769 | 0 | if (tls_type & GOT_TLS_GDESC) |
3770 | 0 | { |
3771 | | /* Unless it is a static link, DESC always emits a |
3772 | | dynamic relocation. */ |
3773 | 0 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3774 | 0 | rela.r_offset = sec_addr (got) + got_off + desc_off; |
3775 | 0 | rela.r_addend = 0; |
3776 | 0 | if (indx == 0) |
3777 | 0 | rela.r_addend = tlsoff (info, relocation); |
3778 | |
|
3779 | 0 | rela.r_info = ELF64_R_INFO (indx, R_LARCH_TLS_DESC64); |
3780 | 0 | loongarch_elf_append_rela (output_bfd, relgot, &rela); |
3781 | 0 | bfd_put_64 (output_bfd, 0, |
3782 | 0 | got->contents + got_off + desc_off); |
3783 | 0 | } |
3784 | 0 | if (tls_type & GOT_TLS_IE) |
3785 | 0 | { |
3786 | 0 | if (need_reloc) |
3787 | 0 | { |
3788 | 0 | bfd_put_64 (output_bfd, 0, |
3789 | 0 | got->contents + got_off + ie_off); |
3790 | 0 | rela.r_offset = sec_addr (got) + got_off + ie_off; |
3791 | 0 | rela.r_addend = 0; |
3792 | |
|
3793 | 0 | if (indx == 0) |
3794 | 0 | rela.r_addend = tlsoff (info, relocation); |
3795 | 0 | rela.r_info = ELF64_R_INFO (indx, R_LARCH_TLS_TPREL64); |
3796 | 0 | loongarch_elf_append_rela (output_bfd, relgot, &rela); |
3797 | 0 | } |
3798 | 0 | else |
3799 | 0 | { |
3800 | | /* In a static link or an executable link with the symbol |
3801 | | bindinglocally, compute offset directly. */ |
3802 | 0 | bfd_put_64 (output_bfd, tlsoff (info, relocation), |
3803 | 0 | got->contents + got_off + ie_off); |
3804 | 0 | } |
3805 | 0 | } |
3806 | 0 | } |
3807 | 0 | relocation = (got_off & (~(bfd_vma)1)) + sec_addr (got); |
3808 | 0 | if (is_desc) |
3809 | 0 | relocation += desc_off; |
3810 | 0 | else if (is_ie) |
3811 | 0 | relocation += ie_off; |
3812 | |
|
3813 | 0 | if (r_type == R_LARCH_TLS_LD_PC_HI20 |
3814 | 0 | || r_type == R_LARCH_TLS_GD_PC_HI20 |
3815 | 0 | || r_type == R_LARCH_TLS_IE_PC_HI20 |
3816 | 0 | || r_type == R_LARCH_TLS_DESC_PC_HI20) |
3817 | 0 | RELOCATE_CALC_PC32_HI20 (relocation, pc); |
3818 | 0 | else if (r_type == R_LARCH_TLS_LD_PCREL20_S2 |
3819 | 0 | || r_type == R_LARCH_TLS_GD_PCREL20_S2 |
3820 | 0 | || r_type == R_LARCH_TLS_DESC_PCREL20_S2) |
3821 | 0 | relocation -= pc; |
3822 | | /* else {} ABS relocations. */ |
3823 | 0 | break; |
3824 | | |
3825 | 0 | case R_LARCH_TLS_DESC_PC_LO12: |
3826 | 0 | case R_LARCH_TLS_DESC64_PC_LO20: |
3827 | 0 | case R_LARCH_TLS_DESC64_PC_HI12: |
3828 | 0 | case R_LARCH_TLS_DESC_LO12: |
3829 | 0 | case R_LARCH_TLS_DESC64_LO20: |
3830 | 0 | case R_LARCH_TLS_DESC64_HI12: |
3831 | 0 | { |
3832 | 0 | unresolved_reloc = false; |
3833 | |
|
3834 | 0 | if (h) |
3835 | 0 | relocation = sec_addr (got) + (h->got.offset & (~(bfd_vma)1)); |
3836 | 0 | else |
3837 | 0 | relocation = sec_addr (got) |
3838 | 0 | + (local_got_offsets[r_symndx] & (~(bfd_vma)1)); |
3839 | |
|
3840 | 0 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); |
3841 | | /* Use both TLS_GD and TLS_DESC. */ |
3842 | 0 | if (GOT_TLS_GD_BOTH_P (tls_type)) |
3843 | 0 | relocation += 2 * GOT_ENTRY_SIZE; |
3844 | |
|
3845 | 0 | if (r_type == R_LARCH_TLS_DESC64_PC_LO20) |
3846 | 0 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); |
3847 | 0 | else if (r_type == R_LARCH_TLS_DESC64_PC_HI12) |
3848 | 0 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 12); |
3849 | |
|
3850 | 0 | break; |
3851 | 0 | } |
3852 | | |
3853 | 0 | case R_LARCH_TLS_DESC_LD: |
3854 | 0 | case R_LARCH_TLS_DESC_CALL: |
3855 | 0 | unresolved_reloc = false; |
3856 | 0 | break; |
3857 | | |
3858 | 0 | case R_LARCH_TLS_IE_PC_LO12: |
3859 | 0 | case R_LARCH_TLS_IE64_PC_LO20: |
3860 | 0 | case R_LARCH_TLS_IE64_PC_HI12: |
3861 | 0 | case R_LARCH_TLS_IE_LO12: |
3862 | 0 | case R_LARCH_TLS_IE64_LO20: |
3863 | 0 | case R_LARCH_TLS_IE64_HI12: |
3864 | 0 | unresolved_reloc = false; |
3865 | |
|
3866 | 0 | if (h) |
3867 | 0 | relocation = sec_addr (got) + (h->got.offset & (~(bfd_vma)1)); |
3868 | 0 | else |
3869 | 0 | relocation = sec_addr (got) |
3870 | 0 | + (local_got_offsets[r_symndx] & (~(bfd_vma)1)); |
3871 | |
|
3872 | 0 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); |
3873 | | /* Use TLS_GD TLS_DESC and TLS_IE. */ |
3874 | 0 | if (GOT_TLS_GD_BOTH_P (tls_type) && (tls_type & GOT_TLS_IE)) |
3875 | 0 | relocation += 4 * GOT_ENTRY_SIZE; |
3876 | | /* Use GOT_TLS_GD_ANY_P (tls_type) and TLS_IE. */ |
3877 | 0 | else if (GOT_TLS_GD_ANY_P (tls_type) && (tls_type & GOT_TLS_IE)) |
3878 | 0 | relocation += 2 * GOT_ENTRY_SIZE; |
3879 | |
|
3880 | 0 | if (r_type == R_LARCH_TLS_IE64_PC_LO20) |
3881 | 0 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); |
3882 | 0 | else if (r_type == R_LARCH_TLS_IE64_PC_HI12) |
3883 | 0 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 12); |
3884 | |
|
3885 | 0 | break; |
3886 | | |
3887 | 0 | case R_LARCH_RELAX: |
3888 | 0 | case R_LARCH_ALIGN: |
3889 | 0 | r = bfd_reloc_continue; |
3890 | 0 | unresolved_reloc = false; |
3891 | 0 | break; |
3892 | | |
3893 | 0 | default: |
3894 | 0 | break; |
3895 | 0 | } |
3896 | | |
3897 | 0 | if (fatal) |
3898 | 0 | break; |
3899 | | |
3900 | 0 | do |
3901 | 0 | { |
3902 | | /* 'unresolved_reloc' means we haven't done it yet. |
3903 | | We need help of dynamic linker to fix this memory location up. */ |
3904 | 0 | if (!unresolved_reloc) |
3905 | 0 | break; |
3906 | | |
3907 | 0 | if (_bfd_elf_section_offset (output_bfd, info, input_section, |
3908 | 0 | rel->r_offset) == MINUS_ONE) |
3909 | | /* WHY? May because it's invalid so skip checking. |
3910 | | But why dynamic reloc a invalid section? */ |
3911 | 0 | break; |
3912 | | |
3913 | 0 | if (input_section->output_section->flags & SEC_DEBUGGING) |
3914 | 0 | { |
3915 | 0 | fatal = (loongarch_reloc_is_fatal |
3916 | 0 | (info, input_bfd, input_section, rel, howto, |
3917 | 0 | bfd_reloc_dangerous, is_undefweak, name, |
3918 | 0 | "Seems dynamic linker not process " |
3919 | 0 | "sections 'SEC_DEBUGGING'.")); |
3920 | 0 | } |
3921 | 0 | if (!is_dyn) |
3922 | 0 | break; |
3923 | | |
3924 | 0 | if ((info->flags & DF_TEXTREL) == 0) |
3925 | 0 | if (input_section->output_section->flags & SEC_READONLY) |
3926 | 0 | info->flags |= DF_TEXTREL; |
3927 | 0 | } |
3928 | 0 | while (0); |
3929 | | |
3930 | 0 | if (fatal) |
3931 | 0 | break; |
3932 | | |
3933 | 0 | loongarch_record_one_reloc (input_bfd, input_section, r_type, |
3934 | 0 | rel->r_offset, sym, h, rel->r_addend); |
3935 | |
|
3936 | 0 | if (r != bfd_reloc_continue) |
3937 | 0 | r = perform_relocation (rel, input_section, howto, relocation, |
3938 | 0 | input_bfd, contents); |
3939 | |
|
3940 | 0 | switch (r) |
3941 | 0 | { |
3942 | 0 | case bfd_reloc_dangerous: |
3943 | 0 | case bfd_reloc_continue: |
3944 | 0 | case bfd_reloc_ok: |
3945 | 0 | continue; |
3946 | | |
3947 | 0 | case bfd_reloc_overflow: |
3948 | | /* Overflow value can't be filled in. */ |
3949 | 0 | loongarch_dump_reloc_record (info->callbacks->info); |
3950 | 0 | info->callbacks->reloc_overflow |
3951 | 0 | (info, h ? &h->root : NULL, name, howto->name, rel->r_addend, |
3952 | 0 | input_bfd, input_section, rel->r_offset); |
3953 | 0 | break; |
3954 | | |
3955 | 0 | case bfd_reloc_outofrange: |
3956 | | /* Stack state incorrect. */ |
3957 | 0 | loongarch_dump_reloc_record (info->callbacks->info); |
3958 | 0 | info->callbacks->info |
3959 | 0 | ("%X%H: Internal stack state is incorrect.\n" |
3960 | 0 | "Want to push to full stack or pop from empty stack?\n", |
3961 | 0 | input_bfd, input_section, rel->r_offset); |
3962 | 0 | break; |
3963 | | |
3964 | 0 | case bfd_reloc_notsupported: |
3965 | 0 | info->callbacks->info ("%X%H: Unknown relocation type.\n", input_bfd, |
3966 | 0 | input_section, rel->r_offset); |
3967 | 0 | break; |
3968 | | |
3969 | 0 | default: |
3970 | 0 | info->callbacks->info ("%X%H: Internal: unknown error.\n", input_bfd, |
3971 | 0 | input_section, rel->r_offset); |
3972 | 0 | break; |
3973 | 0 | } |
3974 | | |
3975 | 0 | fatal = true; |
3976 | 0 | } |
3977 | | |
3978 | 0 | return !fatal; |
3979 | 0 | } |
3980 | | |
3981 | | static bool |
3982 | | loongarch_relax_delete_bytes (bfd *abfd, |
3983 | | asection *sec, |
3984 | | bfd_vma addr, |
3985 | | size_t count, |
3986 | | struct bfd_link_info *link_info) |
3987 | 0 | { |
3988 | 0 | unsigned int i, symcount; |
3989 | 0 | bfd_vma toaddr = sec->size; |
3990 | 0 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (abfd); |
3991 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
3992 | 0 | unsigned int sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
3993 | 0 | struct bfd_elf_section_data *data = elf_section_data (sec); |
3994 | 0 | bfd_byte *contents = data->this_hdr.contents; |
3995 | | |
3996 | | /* Actually delete the bytes. */ |
3997 | 0 | sec->size -= count; |
3998 | 0 | memmove (contents + addr, contents + addr + count, toaddr - addr - count); |
3999 | | |
4000 | | /* Adjust the location of all of the relocs. Note that we need not |
4001 | | adjust the addends, since all PC-relative references must be against |
4002 | | symbols, which we will adjust below. */ |
4003 | 0 | for (i = 0; i < sec->reloc_count; i++) |
4004 | 0 | if (data->relocs[i].r_offset > addr && data->relocs[i].r_offset < toaddr) |
4005 | 0 | data->relocs[i].r_offset -= count; |
4006 | | |
4007 | | /* Adjust the local symbols defined in this section. */ |
4008 | 0 | for (i = 0; i < symtab_hdr->sh_info; i++) |
4009 | 0 | { |
4010 | 0 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *) symtab_hdr->contents + i; |
4011 | 0 | if (sym->st_shndx == sec_shndx) |
4012 | 0 | { |
4013 | | /* If the symbol is in the range of memory we just moved, we |
4014 | | have to adjust its value. */ |
4015 | 0 | if (sym->st_value > addr && sym->st_value <= toaddr) |
4016 | 0 | sym->st_value -= count; |
4017 | | |
4018 | | /* If the symbol *spans* the bytes we just deleted (i.e. its |
4019 | | *end* is in the moved bytes but its *start* isn't), then we |
4020 | | must adjust its size. |
4021 | | |
4022 | | This test needs to use the original value of st_value, otherwise |
4023 | | we might accidentally decrease size when deleting bytes right |
4024 | | before the symbol. But since deleted relocs can't span across |
4025 | | symbols, we can't have both a st_value and a st_size decrease, |
4026 | | so it is simpler to just use an else. */ |
4027 | 0 | else if (sym->st_value <= addr |
4028 | 0 | && sym->st_value + sym->st_size > addr |
4029 | 0 | && sym->st_value + sym->st_size <= toaddr) |
4030 | 0 | sym->st_size -= count; |
4031 | 0 | } |
4032 | 0 | } |
4033 | | |
4034 | | /* Now adjust the global symbols defined in this section. */ |
4035 | 0 | symcount = ((symtab_hdr->sh_size / sizeof (Elf64_External_Sym)) |
4036 | 0 | - symtab_hdr->sh_info); |
4037 | |
|
4038 | 0 | for (i = 0; i < symcount; i++) |
4039 | 0 | { |
4040 | 0 | struct elf_link_hash_entry *sym_hash = sym_hashes[i]; |
4041 | | |
4042 | | /* The '--wrap SYMBOL' option is causing a pain when the object file, |
4043 | | containing the definition of __wrap_SYMBOL, includes a direct |
4044 | | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference |
4045 | | the same symbol (which is __wrap_SYMBOL), but still exist as two |
4046 | | different symbols in 'sym_hashes', we don't want to adjust |
4047 | | the global symbol __wrap_SYMBOL twice. |
4048 | | |
4049 | | The same problem occurs with symbols that are versioned_hidden, as |
4050 | | foo becomes an alias for foo@BAR, and hence they need the same |
4051 | | treatment. */ |
4052 | 0 | if (link_info->wrap_hash != NULL |
4053 | 0 | || sym_hash->versioned != unversioned) |
4054 | 0 | { |
4055 | 0 | struct elf_link_hash_entry **cur_sym_hashes; |
4056 | | |
4057 | | /* Loop only over the symbols which have already been checked. */ |
4058 | 0 | for (cur_sym_hashes = sym_hashes; cur_sym_hashes < &sym_hashes[i]; |
4059 | 0 | cur_sym_hashes++) |
4060 | 0 | { |
4061 | | /* If the current symbol is identical to 'sym_hash', that means |
4062 | | the symbol was already adjusted (or at least checked). */ |
4063 | 0 | if (*cur_sym_hashes == sym_hash) |
4064 | 0 | break; |
4065 | 0 | } |
4066 | | /* Don't adjust the symbol again. */ |
4067 | 0 | if (cur_sym_hashes < &sym_hashes[i]) |
4068 | 0 | continue; |
4069 | 0 | } |
4070 | | |
4071 | 0 | if ((sym_hash->root.type == bfd_link_hash_defined |
4072 | 0 | || sym_hash->root.type == bfd_link_hash_defweak) |
4073 | 0 | && sym_hash->root.u.def.section == sec) |
4074 | 0 | { |
4075 | | /* As above, adjust the value if needed. */ |
4076 | 0 | if (sym_hash->root.u.def.value > addr |
4077 | 0 | && sym_hash->root.u.def.value <= toaddr) |
4078 | 0 | sym_hash->root.u.def.value -= count; |
4079 | | |
4080 | | /* As above, adjust the size if needed. */ |
4081 | 0 | else if (sym_hash->root.u.def.value <= addr |
4082 | 0 | && sym_hash->root.u.def.value + sym_hash->size > addr |
4083 | 0 | && sym_hash->root.u.def.value + sym_hash->size <= toaddr) |
4084 | 0 | sym_hash->size -= count; |
4085 | 0 | } |
4086 | 0 | } |
4087 | |
|
4088 | 0 | return true; |
4089 | 0 | } |
4090 | | |
4091 | | /* Start perform TLS type transition. |
4092 | | Currently there are three cases of relocation handled here: |
4093 | | DESC -> IE, DEC -> LE and IE -> LE. */ |
4094 | | static bool |
4095 | | loongarch_tls_perform_trans (bfd *abfd, asection *sec, |
4096 | | Elf_Internal_Rela *rel, |
4097 | | struct elf_link_hash_entry *h, |
4098 | | struct bfd_link_info *info) |
4099 | 0 | { |
4100 | 0 | unsigned long insn; |
4101 | 0 | bool local_exec = bfd_link_executable (info) |
4102 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h); |
4103 | 0 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; |
4104 | 0 | unsigned long r_type = ELF64_R_TYPE (rel->r_info); |
4105 | 0 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
4106 | |
|
4107 | 0 | switch (r_type) |
4108 | 0 | { |
4109 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
4110 | 0 | if (local_exec) |
4111 | 0 | { |
4112 | | /* DESC -> LE relaxation: |
4113 | | pcalalau12i $a0,%desc_pc_hi20(var) => |
4114 | | lu12i.w $a0,%le_hi20(var) |
4115 | | */ |
4116 | 0 | bfd_put (32, abfd, LARCH_LU12I_W | LARCH_RD_A0, |
4117 | 0 | contents + rel->r_offset); |
4118 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, R_LARCH_TLS_LE_HI20); |
4119 | 0 | } |
4120 | 0 | else |
4121 | 0 | { |
4122 | | /* DESC -> IE relaxation: |
4123 | | pcalalau12i $a0,%desc_pc_hi20(var) => |
4124 | | pcalalau12i $a0,%ie_pc_hi20(var) |
4125 | | */ |
4126 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, R_LARCH_TLS_IE_PC_HI20); |
4127 | 0 | } |
4128 | 0 | return true; |
4129 | | |
4130 | 0 | case R_LARCH_TLS_DESC_PC_LO12: |
4131 | 0 | if (local_exec) |
4132 | 0 | { |
4133 | | /* DESC -> LE relaxation: |
4134 | | addi.d $a0,$a0,%desc_pc_lo12(var) => |
4135 | | ori $a0,$a0,le_lo12(var) |
4136 | | */ |
4137 | 0 | insn = LARCH_ORI | LARCH_RD_RJ_A0; |
4138 | 0 | bfd_put (32, abfd, LARCH_ORI | LARCH_RD_RJ_A0, |
4139 | 0 | contents + rel->r_offset); |
4140 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, R_LARCH_TLS_LE_LO12); |
4141 | 0 | } |
4142 | 0 | else |
4143 | 0 | { |
4144 | | /* DESC -> IE relaxation: |
4145 | | addi.d $a0,$a0,%desc_pc_lo12(var) => |
4146 | | ld.d $a0,$a0,%ie_pc_lo12(var) |
4147 | | */ |
4148 | 0 | bfd_put (32, abfd, LARCH_LD_D | LARCH_RD_RJ_A0, |
4149 | 0 | contents + rel->r_offset); |
4150 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, R_LARCH_TLS_IE_PC_LO12); |
4151 | 0 | } |
4152 | 0 | return true; |
4153 | | |
4154 | 0 | case R_LARCH_TLS_DESC_LD: |
4155 | 0 | case R_LARCH_TLS_DESC_CALL: |
4156 | | /* DESC -> LE/IE relaxation: |
4157 | | ld.d $ra,$a0,%desc_ld(var) => NOP |
4158 | | jirl $ra,$ra,%desc_call(var) => NOP |
4159 | | */ |
4160 | 0 | rel->r_info = ELF64_R_INFO (0, R_LARCH_NONE); |
4161 | 0 | bfd_put (32, abfd, LARCH_NOP, contents + rel->r_offset); |
4162 | | /* link with -relax option will delete NOP. */ |
4163 | 0 | if (!info->disable_target_specific_optimizations) |
4164 | 0 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, 4, info); |
4165 | 0 | return true; |
4166 | | |
4167 | 0 | case R_LARCH_TLS_IE_PC_HI20: |
4168 | 0 | if (local_exec) |
4169 | 0 | { |
4170 | | /* IE -> LE relaxation: |
4171 | | pcalalau12i $rd,%ie_pc_hi20(var) => |
4172 | | lu12i.w $rd,%le_hi20(var) |
4173 | | */ |
4174 | 0 | insn = bfd_getl32 (contents + rel->r_offset); |
4175 | 0 | bfd_put (32, abfd, LARCH_LU12I_W | (insn & 0x1f), |
4176 | 0 | contents + rel->r_offset); |
4177 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, R_LARCH_TLS_LE_HI20); |
4178 | 0 | } |
4179 | 0 | return true; |
4180 | | |
4181 | 0 | case R_LARCH_TLS_IE_PC_LO12: |
4182 | 0 | if (local_exec) |
4183 | 0 | { |
4184 | | /* IE -> LE relaxation: |
4185 | | ld.d $rd,$rj,%%ie_pc_lo12(var) => |
4186 | | ori $rd,$rj,le_lo12(var) |
4187 | | */ |
4188 | 0 | insn = bfd_getl32 (contents + rel->r_offset); |
4189 | 0 | bfd_put (32, abfd, LARCH_ORI | (insn & 0x3ff), |
4190 | 0 | contents + rel->r_offset); |
4191 | 0 | rel->r_info = ELF64_R_INFO (r_symndx, R_LARCH_TLS_LE_LO12); |
4192 | 0 | } |
4193 | 0 | return true; |
4194 | 0 | } |
4195 | | |
4196 | 0 | return false; |
4197 | 0 | } |
4198 | | |
4199 | | |
4200 | | /* Relax tls le, mainly relax the process of getting TLS le symbolic addresses. |
4201 | | there are three situations in which an assembly instruction sequence needs to |
4202 | | be relaxed: |
4203 | | symbol address = tp + offset (symbol),offset (symbol) = le_hi20_r + le_lo12_r |
4204 | | |
4205 | | Case 1: |
4206 | | in this case, the rd register in the st.{w/d} instruction does not store the |
4207 | | full tls symbolic address, but tp + le_hi20_r, which is a part of the tls |
4208 | | symbolic address, and then obtains the rd + le_lo12_r address through the |
4209 | | st.w instruction feature. |
4210 | | this is the full tls symbolic address (tp + le_hi20_r + le_lo12_r). |
4211 | | |
4212 | | before relax: after relax: |
4213 | | |
4214 | | lu12i.w $rd,%le_hi20_r (sym) ==> (instruction deleted) |
4215 | | add.{w/d} $rd,$rd,$tp,%le_add_r (sym) ==> (instruction deleted) |
4216 | | st.{w/d} $rs,$rd,%le_lo12_r (sym) ==> st.{w/d} $rs,$tp,%le_lo12_r (sym) |
4217 | | |
4218 | | Case 2: |
4219 | | in this case, ld.{w/d} is similar to st.{w/d} in case1. |
4220 | | |
4221 | | before relax: after relax: |
4222 | | |
4223 | | lu12i.w $rd,%le_hi20_r (sym) ==> (instruction deleted) |
4224 | | add.{w/d} $rd,$rd,$tp,%le_add_r (sym) ==> (instruction deleted) |
4225 | | ld.{w/d} $rs,$rd,%le_lo12_r (sym) ==> ld.{w/d} $rs,$tp,%le_lo12_r (sym) |
4226 | | |
4227 | | Case 3: |
4228 | | in this case,the rs register in addi.{w/d} stores the full address of the tls |
4229 | | symbol (tp + le_hi20_r + le_lo12_r). |
4230 | | |
4231 | | before relax: after relax: |
4232 | | |
4233 | | lu12i.w $rd,%le_hi20_r (sym) ==> (instruction deleted) |
4234 | | add.{w/d} $rd,$rd,$tp,%le_add_r (sym) ==> (instruction deleted) |
4235 | | addi.{w/d} $rs,$rd,%le_lo12_r (sym) ==> addi.{w/d} $rs,$tp,%le_lo12_r (sym) |
4236 | | |
4237 | | |
4238 | | For relocation of all old LE instruction sequences, whether it is |
4239 | | a normal code model or an extreme code model, relaxation will be |
4240 | | performed when the relaxation conditions are met. |
4241 | | |
4242 | | nomal code model: |
4243 | | lu12i.w $rd,%le_hi20(sym) => (deleted) |
4244 | | ori $rd,$rd,le_lo12(sym) => ori $rd,$zero,le_lo12(sym) |
4245 | | |
4246 | | extreme code model: |
4247 | | lu12i.w $rd,%le_hi20(sym) => (deleted) |
4248 | | ori $rd,$rd,%le_lo12(sym) => ori $rd,$zero,le_lo12(sym) |
4249 | | lu32i.d $rd,%le64_lo20(sym) => (deleted) |
4250 | | lu52i.d $rd,$rd,%le64_hi12(sym) => (deleted) |
4251 | | */ |
4252 | | static bool |
4253 | | loongarch_relax_tls_le (bfd *abfd, asection *sec, |
4254 | | Elf_Internal_Rela *rel, |
4255 | | struct bfd_link_info *link_info, |
4256 | | bfd_vma symval) |
4257 | 0 | { |
4258 | 0 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; |
4259 | 0 | uint32_t insn = bfd_get (32, abfd, contents + rel->r_offset); |
4260 | 0 | static uint32_t insn_rj,insn_rd; |
4261 | 0 | symval = symval - elf_hash_table (link_info)->tls_sec->vma; |
4262 | | /* The old LE instruction sequence can be relaxed when the symbol offset |
4263 | | is smaller than the 12-bit range. */ |
4264 | 0 | if (ELF64_R_TYPE ((rel + 1)->r_info) == R_LARCH_RELAX && (symval <= 0xfff)) |
4265 | 0 | { |
4266 | 0 | switch (ELF64_R_TYPE (rel->r_info)) |
4267 | 0 | { |
4268 | | /*if offset < 0x800, then perform the new le instruction |
4269 | | sequence relax. */ |
4270 | 0 | case R_LARCH_TLS_LE_HI20_R: |
4271 | 0 | case R_LARCH_TLS_LE_ADD_R: |
4272 | | /* delete insn. */ |
4273 | 0 | if (symval < 0x800) |
4274 | 0 | { |
4275 | 0 | rel->r_info = ELF64_R_INFO (0, R_LARCH_NONE); |
4276 | 0 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, |
4277 | 0 | 4, link_info); |
4278 | 0 | } |
4279 | 0 | break; |
4280 | | |
4281 | 0 | case R_LARCH_TLS_LE_LO12_R: |
4282 | 0 | if (symval < 0x800) |
4283 | 0 | { |
4284 | | /* Change rj to $tp. */ |
4285 | 0 | insn_rj = 0x2 << 5; |
4286 | | /* Get rd register. */ |
4287 | 0 | insn_rd = insn & 0x1f; |
4288 | | /* Write symbol offset. */ |
4289 | 0 | symval <<= 10; |
4290 | | /* Writes the modified instruction. */ |
4291 | 0 | insn = insn & 0xffc00000; |
4292 | 0 | insn = insn | symval | insn_rj | insn_rd; |
4293 | 0 | bfd_put (32, abfd, insn, contents + rel->r_offset); |
4294 | 0 | } |
4295 | 0 | break; |
4296 | | |
4297 | 0 | case R_LARCH_TLS_LE_HI20: |
4298 | 0 | case R_LARCH_TLS_LE64_LO20: |
4299 | 0 | case R_LARCH_TLS_LE64_HI12: |
4300 | 0 | rel->r_info = ELF64_R_INFO (0, R_LARCH_NONE); |
4301 | 0 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, |
4302 | 0 | 4, link_info); |
4303 | 0 | break; |
4304 | | |
4305 | 0 | case R_LARCH_TLS_LE_LO12: |
4306 | 0 | bfd_put (32, abfd, LARCH_ORI | (insn & 0x1f), |
4307 | 0 | contents + rel->r_offset); |
4308 | 0 | break; |
4309 | | |
4310 | 0 | default: |
4311 | 0 | break; |
4312 | 0 | } |
4313 | 0 | } |
4314 | 0 | return true; |
4315 | 0 | } |
4316 | | |
4317 | | /* Relax pcalau12i,addi.d => pcaddi. */ |
4318 | | static bool |
4319 | | loongarch_relax_pcala_addi (bfd *abfd, asection *sec, asection *sym_sec, |
4320 | | Elf_Internal_Rela *rel_hi, bfd_vma symval, |
4321 | | struct bfd_link_info *info, bool *again, |
4322 | | bfd_vma max_alignment) |
4323 | 0 | { |
4324 | 0 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; |
4325 | 0 | Elf_Internal_Rela *rel_lo = rel_hi + 2; |
4326 | 0 | uint32_t pca = bfd_get (32, abfd, contents + rel_hi->r_offset); |
4327 | 0 | uint32_t add = bfd_get (32, abfd, contents + rel_lo->r_offset); |
4328 | 0 | uint32_t rd = pca & 0x1f; |
4329 | | |
4330 | | /* This section's output_offset need to subtract the bytes of instructions |
4331 | | relaxed by the previous sections, so it needs to be updated beforehand. |
4332 | | size_input_section already took care of updating it after relaxation, |
4333 | | so we additionally update once here. */ |
4334 | 0 | sec->output_offset = sec->output_section->size; |
4335 | 0 | bfd_vma pc = sec_addr (sec) + rel_hi->r_offset; |
4336 | | |
4337 | | /* If pc and symbol not in the same segment, add/sub segment alignment. |
4338 | | FIXME: if there are multiple readonly segments? How to determine if |
4339 | | two sections are in the same segment. */ |
4340 | 0 | if (!(sym_sec->flags & SEC_READONLY)) |
4341 | 0 | { |
4342 | 0 | max_alignment = info->maxpagesize > max_alignment ? info->maxpagesize |
4343 | 0 | : max_alignment; |
4344 | 0 | if (symval > pc) |
4345 | 0 | pc -= max_alignment; |
4346 | 0 | else if (symval < pc) |
4347 | 0 | pc += max_alignment; |
4348 | 0 | } |
4349 | 0 | else |
4350 | 0 | if (symval > pc) |
4351 | 0 | pc -= max_alignment; |
4352 | 0 | else if (symval < pc) |
4353 | 0 | pc += max_alignment; |
4354 | |
|
4355 | 0 | const uint32_t addi_d = 0x02c00000; |
4356 | 0 | const uint32_t pcaddi = 0x18000000; |
4357 | | |
4358 | | /* Is pcalau12i + addi.d insns? */ |
4359 | 0 | if ((ELF64_R_TYPE (rel_lo->r_info) != R_LARCH_PCALA_LO12) |
4360 | 0 | || (ELF64_R_TYPE ((rel_lo + 1)->r_info) != R_LARCH_RELAX) |
4361 | 0 | || (ELF64_R_TYPE ((rel_hi + 1)->r_info) != R_LARCH_RELAX) |
4362 | 0 | || (rel_hi->r_offset + 4 != rel_lo->r_offset) |
4363 | 0 | || ((add & addi_d) != addi_d) |
4364 | | /* Is pcalau12i $rd + addi.d $rd,$rd? */ |
4365 | 0 | || ((add & 0x1f) != rd) |
4366 | 0 | || (((add >> 5) & 0x1f) != rd) |
4367 | | /* Can be relaxed to pcaddi? */ |
4368 | 0 | || (symval & 0x3) /* 4 bytes align. */ |
4369 | 0 | || ((bfd_signed_vma)(symval - pc) < (bfd_signed_vma)(int32_t)0xffe00000) |
4370 | 0 | || ((bfd_signed_vma)(symval - pc) > (bfd_signed_vma)(int32_t)0x1ffffc)) |
4371 | 0 | return false; |
4372 | | |
4373 | | /* Continue next relax trip. */ |
4374 | 0 | *again = true; |
4375 | |
|
4376 | 0 | pca = pcaddi | rd; |
4377 | 0 | bfd_put (32, abfd, pca, contents + rel_hi->r_offset); |
4378 | | |
4379 | | /* Adjust relocations. */ |
4380 | 0 | rel_hi->r_info = ELF64_R_INFO (ELF64_R_SYM (rel_hi->r_info), |
4381 | 0 | R_LARCH_PCREL20_S2); |
4382 | 0 | rel_lo->r_info = ELF64_R_INFO (0, R_LARCH_NONE); |
4383 | |
|
4384 | 0 | loongarch_relax_delete_bytes (abfd, sec, rel_lo->r_offset, 4, info); |
4385 | |
|
4386 | 0 | return true; |
4387 | 0 | } |
4388 | | |
4389 | | /* call36 f -> bl f |
4390 | | tail36 $t0, f -> b f. */ |
4391 | | static bool |
4392 | | loongarch_relax_call36 (bfd *abfd, asection *sec, |
4393 | | Elf_Internal_Rela *rel, bfd_vma symval, |
4394 | | struct bfd_link_info *info, bool *again, |
4395 | | bfd_vma max_alignment) |
4396 | 0 | { |
4397 | 0 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; |
4398 | 0 | uint32_t jirl = bfd_get (32, abfd, contents + rel->r_offset + 4); |
4399 | 0 | uint32_t rd = jirl & 0x1f; |
4400 | | |
4401 | | /* This section's output_offset need to subtract the bytes of instructions |
4402 | | relaxed by the previous sections, so it needs to be updated beforehand. |
4403 | | size_input_section already took care of updating it after relaxation, |
4404 | | so we additionally update once here. */ |
4405 | 0 | sec->output_offset = sec->output_section->size; |
4406 | 0 | bfd_vma pc = sec_addr (sec) + rel->r_offset; |
4407 | | |
4408 | | /* If pc and symbol not in the same segment, add/sub segment alignment. |
4409 | | FIXME: if there are multiple readonly segments? How to determine if |
4410 | | two sections are in the same segment. */ |
4411 | 0 | if (symval > pc) |
4412 | 0 | pc -= (max_alignment > 4 ? max_alignment : 0); |
4413 | 0 | else if (symval < pc) |
4414 | 0 | pc += (max_alignment > 4 ? max_alignment : 0); |
4415 | |
|
4416 | 0 | const uint32_t jirl_opcode = 0x4c000000; |
4417 | | |
4418 | | /* Is pcalau12i + addi.d insns? */ |
4419 | 0 | if ((ELF64_R_TYPE ((rel + 1)->r_info) != R_LARCH_RELAX) |
4420 | 0 | || ((jirl & jirl_opcode) != jirl_opcode) |
4421 | 0 | || ((bfd_signed_vma)(symval - pc) < (bfd_signed_vma)(int32_t)0xf8000000) |
4422 | 0 | || ((bfd_signed_vma)(symval - pc) > (bfd_signed_vma)(int32_t)0x7fffffc)) |
4423 | 0 | return false; |
4424 | | |
4425 | | /* Continue next relax trip. */ |
4426 | 0 | *again = true; |
4427 | |
|
4428 | 0 | const uint32_t bl = 0x54000000; |
4429 | 0 | const uint32_t b = 0x50000000; |
4430 | |
|
4431 | 0 | if (rd) |
4432 | 0 | bfd_put (32, abfd, bl, contents + rel->r_offset); |
4433 | 0 | else |
4434 | 0 | bfd_put (32, abfd, b, contents + rel->r_offset); |
4435 | | |
4436 | | /* Adjust relocations. */ |
4437 | 0 | rel->r_info = ELF64_R_INFO (ELF64_R_SYM (rel->r_info), R_LARCH_B26); |
4438 | | /* Delete jirl instruction. */ |
4439 | 0 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset + 4, 4, info); |
4440 | 0 | return true; |
4441 | 0 | } |
4442 | | |
4443 | | /* Relax pcalau12i,ld.d => pcalau12i,addi.d. */ |
4444 | | static bool |
4445 | | loongarch_relax_pcala_ld (bfd *abfd, asection *sec, |
4446 | | Elf_Internal_Rela *rel_hi) |
4447 | 0 | { |
4448 | 0 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; |
4449 | 0 | Elf_Internal_Rela *rel_lo = rel_hi + 2; |
4450 | 0 | uint32_t pca = bfd_get (32, abfd, contents + rel_hi->r_offset); |
4451 | 0 | uint32_t ld = bfd_get (32, abfd, contents + rel_lo->r_offset); |
4452 | 0 | uint32_t rd = pca & 0x1f; |
4453 | 0 | const uint32_t ld_d = 0x28c00000; |
4454 | 0 | uint32_t addi_d = 0x02c00000; |
4455 | |
|
4456 | 0 | if ((ELF64_R_TYPE (rel_lo->r_info) != R_LARCH_GOT_PC_LO12) |
4457 | 0 | || (ELF64_R_TYPE ((rel_lo + 1)->r_info) != R_LARCH_RELAX) |
4458 | 0 | || (ELF64_R_TYPE ((rel_hi + 1)->r_info) != R_LARCH_RELAX) |
4459 | 0 | || (rel_hi->r_offset + 4 != rel_lo->r_offset) |
4460 | 0 | || ((ld & 0x1f) != rd) |
4461 | 0 | || (((ld >> 5) & 0x1f) != rd) |
4462 | 0 | || ((ld & ld_d) != ld_d)) |
4463 | 0 | return false; |
4464 | | |
4465 | 0 | addi_d = addi_d | (rd << 5) | rd; |
4466 | 0 | bfd_put (32, abfd, addi_d, contents + rel_lo->r_offset); |
4467 | | |
4468 | 0 | rel_hi->r_info = ELF64_R_INFO (ELF64_R_SYM (rel_hi->r_info), |
4469 | 0 | R_LARCH_PCALA_HI20); |
4470 | 0 | rel_lo->r_info = ELF64_R_INFO (ELF64_R_SYM (rel_lo->r_info), |
4471 | 0 | R_LARCH_PCALA_LO12); |
4472 | 0 | return true; |
4473 | 0 | } |
4474 | | |
4475 | | /* Called by after_allocation to set the information of data segment |
4476 | | before relaxing. */ |
4477 | | |
4478 | | void |
4479 | | bfd_elf64_loongarch_set_data_segment_info (struct bfd_link_info *info, |
4480 | | int *data_segment_phase) |
4481 | 0 | { |
4482 | 0 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); |
4483 | 0 | htab->data_segment_phase = data_segment_phase; |
4484 | 0 | } |
4485 | | |
4486 | | /* Implement R_LARCH_ALIGN by deleting excess alignment NOPs. |
4487 | | Once we've handled an R_LARCH_ALIGN, we can't relax anything else. */ |
4488 | | static bool |
4489 | | loongarch_relax_align (bfd *abfd, asection *sec, |
4490 | | asection *sym_sec, |
4491 | | struct bfd_link_info *link_info, |
4492 | | Elf_Internal_Rela *rel, |
4493 | | bfd_vma symval) |
4494 | 0 | { |
4495 | 0 | bfd_vma addend, max = 0, alignment = 1; |
4496 | |
|
4497 | 0 | int sym_index = ELF64_R_SYM (rel->r_info); |
4498 | 0 | if (sym_index > 0) |
4499 | 0 | { |
4500 | 0 | alignment = 1 << (rel->r_addend & 0xff); |
4501 | 0 | max = rel->r_addend >> 8; |
4502 | 0 | } |
4503 | 0 | else |
4504 | 0 | alignment = rel->r_addend + 4; |
4505 | |
|
4506 | 0 | addend = alignment - 4; /* The bytes of NOPs added by R_LARCH_ALIGN. */ |
4507 | 0 | symval -= addend; /* The address of first NOP added by R_LARCH_ALIGN. */ |
4508 | 0 | bfd_vma aligned_addr = ((symval - 1) & ~(alignment - 1)) + alignment; |
4509 | 0 | bfd_vma need_nop_bytes = aligned_addr - symval; /* */ |
4510 | | |
4511 | | /* Make sure there are enough NOPs to actually achieve the alignment. */ |
4512 | 0 | if (addend < need_nop_bytes) |
4513 | 0 | { |
4514 | 0 | _bfd_error_handler |
4515 | 0 | (_("%pB(%pA+%#" PRIx64 "): %" PRId64 " bytes required for alignment " |
4516 | 0 | "to %" PRId64 "-byte boundary, but only %" PRId64 " present"), |
4517 | 0 | abfd, sym_sec, (uint64_t) rel->r_offset, |
4518 | 0 | (int64_t) need_nop_bytes, (int64_t) alignment, (int64_t) addend); |
4519 | 0 | bfd_set_error (bfd_error_bad_value); |
4520 | 0 | return false; |
4521 | 0 | } |
4522 | | |
4523 | | /* Once we've handled an R_LARCH_ALIGN in a section, |
4524 | | we can't relax anything else in this section. */ |
4525 | 0 | sec->sec_flg0 = true; |
4526 | 0 | rel->r_info = ELF64_R_INFO (0, R_LARCH_NONE); |
4527 | | |
4528 | | /* If skipping more bytes than the specified maximum, |
4529 | | then the alignment is not done at all and delete all NOPs. */ |
4530 | 0 | if (max > 0 && need_nop_bytes > max) |
4531 | 0 | return loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, |
4532 | 0 | addend, link_info); |
4533 | | |
4534 | | /* If the number of NOPs is already correct, there's nothing to do. */ |
4535 | 0 | if (need_nop_bytes == addend) |
4536 | 0 | return true; |
4537 | | |
4538 | | /* Delete the excess NOPs. */ |
4539 | 0 | return loongarch_relax_delete_bytes (abfd, sec, |
4540 | 0 | rel->r_offset + need_nop_bytes, |
4541 | 0 | addend - need_nop_bytes, link_info); |
4542 | 0 | } |
4543 | | |
4544 | | /* Relax pcalau12i + addi.d of TLS LD/GD/DESC to pcaddi. */ |
4545 | | static bool |
4546 | | loongarch_relax_tls_ld_gd_desc (bfd *abfd, asection *sec, asection *sym_sec, |
4547 | | Elf_Internal_Rela *rel_hi, bfd_vma symval, |
4548 | | struct bfd_link_info *info, bool *again, |
4549 | | bfd_vma max_alignment) |
4550 | 0 | { |
4551 | 0 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; |
4552 | 0 | Elf_Internal_Rela *rel_lo = rel_hi + 2; |
4553 | 0 | uint32_t pca = bfd_get (32, abfd, contents + rel_hi->r_offset); |
4554 | 0 | uint32_t add = bfd_get (32, abfd, contents + rel_lo->r_offset); |
4555 | 0 | uint32_t rd = pca & 0x1f; |
4556 | | |
4557 | | /* This section's output_offset need to subtract the bytes of instructions |
4558 | | relaxed by the previous sections, so it needs to be updated beforehand. |
4559 | | size_input_section already took care of updating it after relaxation, |
4560 | | so we additionally update once here. */ |
4561 | 0 | sec->output_offset = sec->output_section->size; |
4562 | 0 | bfd_vma pc = sec_addr (sec) + rel_hi->r_offset; |
4563 | | |
4564 | | /* If pc and symbol not in the same segment, add/sub segment alignment. |
4565 | | FIXME: if there are multiple readonly segments? */ |
4566 | 0 | if (!(sym_sec->flags & SEC_READONLY)) |
4567 | 0 | { |
4568 | 0 | max_alignment = info->maxpagesize > max_alignment ? info->maxpagesize |
4569 | 0 | : max_alignment; |
4570 | 0 | if (symval > pc) |
4571 | 0 | pc -= max_alignment; |
4572 | 0 | else if (symval < pc) |
4573 | 0 | pc += max_alignment; |
4574 | 0 | } |
4575 | 0 | else |
4576 | 0 | if (symval > pc) |
4577 | 0 | pc -= max_alignment; |
4578 | 0 | else if (symval < pc) |
4579 | 0 | pc += max_alignment; |
4580 | |
|
4581 | 0 | const uint32_t addi_d = 0x02c00000; |
4582 | 0 | const uint32_t pcaddi = 0x18000000; |
4583 | | |
4584 | | /* Is pcalau12i + addi.d insns? */ |
4585 | 0 | if ((ELF64_R_TYPE (rel_lo->r_info) != R_LARCH_GOT_PC_LO12 |
4586 | 0 | && ELF64_R_TYPE (rel_lo->r_info) != R_LARCH_TLS_DESC_PC_LO12) |
4587 | 0 | || (ELF64_R_TYPE ((rel_lo + 1)->r_info) != R_LARCH_RELAX) |
4588 | 0 | || (ELF64_R_TYPE ((rel_hi + 1)->r_info) != R_LARCH_RELAX) |
4589 | 0 | || (rel_hi->r_offset + 4 != rel_lo->r_offset) |
4590 | 0 | || ((add & addi_d) != addi_d) |
4591 | | /* Is pcalau12i $rd + addi.d $rd,$rd? */ |
4592 | 0 | || ((add & 0x1f) != rd) |
4593 | 0 | || (((add >> 5) & 0x1f) != rd) |
4594 | | /* Can be relaxed to pcaddi? */ |
4595 | 0 | || (symval & 0x3) /* 4 bytes align. */ |
4596 | 0 | || ((bfd_signed_vma)(symval - pc) < (bfd_signed_vma)(int32_t)0xffe00000) |
4597 | 0 | || ((bfd_signed_vma)(symval - pc) > (bfd_signed_vma)(int32_t)0x1ffffc)) |
4598 | 0 | return false; |
4599 | | |
4600 | | /* Continue next relax trip. */ |
4601 | 0 | *again = true; |
4602 | |
|
4603 | 0 | pca = pcaddi | rd; |
4604 | 0 | bfd_put (32, abfd, pca, contents + rel_hi->r_offset); |
4605 | | |
4606 | | /* Adjust relocations. */ |
4607 | 0 | switch (ELF64_R_TYPE (rel_hi->r_info)) |
4608 | 0 | { |
4609 | 0 | case R_LARCH_TLS_LD_PC_HI20: |
4610 | 0 | rel_hi->r_info = ELF64_R_INFO (ELF64_R_SYM (rel_hi->r_info), |
4611 | 0 | R_LARCH_TLS_LD_PCREL20_S2); |
4612 | 0 | break; |
4613 | 0 | case R_LARCH_TLS_GD_PC_HI20: |
4614 | 0 | rel_hi->r_info = ELF64_R_INFO (ELF64_R_SYM (rel_hi->r_info), |
4615 | 0 | R_LARCH_TLS_GD_PCREL20_S2); |
4616 | 0 | break; |
4617 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
4618 | 0 | rel_hi->r_info = ELF64_R_INFO (ELF64_R_SYM (rel_hi->r_info), |
4619 | 0 | R_LARCH_TLS_DESC_PCREL20_S2); |
4620 | 0 | break; |
4621 | 0 | default: |
4622 | 0 | break; |
4623 | 0 | } |
4624 | 0 | rel_lo->r_info = ELF64_R_INFO (0, R_LARCH_NONE); |
4625 | |
|
4626 | 0 | loongarch_relax_delete_bytes (abfd, sec, rel_lo->r_offset, 4, info); |
4627 | |
|
4628 | 0 | return true; |
4629 | 0 | } |
4630 | | |
4631 | | /* Traverse all output sections and return the max alignment. */ |
4632 | | |
4633 | | static bfd_vma |
4634 | | loongarch_get_max_alignment (asection *sec) |
4635 | 0 | { |
4636 | 0 | asection *o; |
4637 | 0 | unsigned int max_alignment_power = 0; |
4638 | |
|
4639 | 0 | for (o = sec->output_section->owner->sections; o != NULL; o = o->next) |
4640 | 0 | if (o->alignment_power > max_alignment_power) |
4641 | 0 | max_alignment_power = o->alignment_power; |
4642 | |
|
4643 | 0 | return (bfd_vma) 1 << max_alignment_power; |
4644 | 0 | } |
4645 | | |
4646 | | static bool |
4647 | | loongarch_elf_relax_section (bfd *abfd, asection *sec, |
4648 | | struct bfd_link_info *info, |
4649 | | bool *again) |
4650 | 0 | { |
4651 | 0 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); |
4652 | 0 | struct bfd_elf_section_data *data = elf_section_data (sec); |
4653 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (abfd); |
4654 | 0 | Elf_Internal_Rela *relocs; |
4655 | 0 | *again = false; |
4656 | 0 | bfd_vma max_alignment = 0; |
4657 | |
|
4658 | 0 | if (bfd_link_relocatable (info) |
4659 | 0 | || sec->sec_flg0 |
4660 | 0 | || (sec->flags & SEC_RELOC) == 0 |
4661 | 0 | || sec->reloc_count == 0 |
4662 | 0 | || (info->disable_target_specific_optimizations |
4663 | 0 | && info->relax_pass == 0) |
4664 | | /* The exp_seg_relro_adjust is enum phase_enum (0x4), |
4665 | | and defined in ld/ldexp.h. */ |
4666 | 0 | || *(htab->data_segment_phase) == 4) |
4667 | 0 | return true; |
4668 | | |
4669 | 0 | if (data->relocs) |
4670 | 0 | relocs = data->relocs; |
4671 | 0 | else if (!(relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
4672 | 0 | info->keep_memory))) |
4673 | 0 | return true; |
4674 | | |
4675 | 0 | if (!data->this_hdr.contents |
4676 | 0 | && !bfd_malloc_and_get_section (abfd, sec, &data->this_hdr.contents)) |
4677 | 0 | return true; |
4678 | | |
4679 | 0 | if (symtab_hdr->sh_info != 0 |
4680 | 0 | && !symtab_hdr->contents |
4681 | 0 | && !(symtab_hdr->contents = |
4682 | 0 | (unsigned char *) bfd_elf_get_elf_syms (abfd, symtab_hdr, |
4683 | 0 | symtab_hdr->sh_info, |
4684 | 0 | 0, NULL, NULL, NULL))) |
4685 | 0 | return true; |
4686 | | |
4687 | 0 | data->relocs = relocs; |
4688 | | |
4689 | | /* Estimate the maximum alignment for all output sections once time |
4690 | | should be enough. */ |
4691 | 0 | max_alignment = htab->max_alignment; |
4692 | 0 | if (max_alignment == (bfd_vma) -1) |
4693 | 0 | { |
4694 | 0 | max_alignment = loongarch_get_max_alignment (sec); |
4695 | 0 | htab->max_alignment = max_alignment; |
4696 | 0 | } |
4697 | |
|
4698 | 0 | for (unsigned int i = 0; i < sec->reloc_count; i++) |
4699 | 0 | { |
4700 | 0 | char symtype; |
4701 | 0 | bfd_vma symval; |
4702 | 0 | asection *sym_sec; |
4703 | 0 | bool local_got = false; |
4704 | 0 | Elf_Internal_Rela *rel = relocs + i; |
4705 | 0 | struct elf_link_hash_entry *h = NULL; |
4706 | 0 | unsigned long r_type = ELF64_R_TYPE (rel->r_info); |
4707 | 0 | unsigned long r_symndx = ELF64_R_SYM (rel->r_info); |
4708 | | |
4709 | | /* Four kind of relocations: |
4710 | | Normal: symval is the symbol address. |
4711 | | R_LARCH_ALIGN: symval is the address of the last NOP instruction |
4712 | | added by this relocation, and then adds 4 more. |
4713 | | R_LARCH_CALL36: symval is the symbol address for local symbols, |
4714 | | or the PLT entry address of the symbol. (Todo) |
4715 | | R_LARCHL_TLS_LD/GD/DESC_PC_HI20: symval is the GOT entry address |
4716 | | of the symbol if transition is not possible. */ |
4717 | 0 | if (r_symndx < symtab_hdr->sh_info) |
4718 | 0 | { |
4719 | 0 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *)symtab_hdr->contents |
4720 | 0 | + r_symndx; |
4721 | 0 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
4722 | 0 | continue; |
4723 | | |
4724 | | /* Only TLS instruction sequences that are accompanied by |
4725 | | R_LARCH_RELAX and cannot perform type transition can be |
4726 | | relaxed. */ |
4727 | 0 | if (R_LARCH_TLS_LD_PC_HI20 == r_type |
4728 | 0 | || R_LARCH_TLS_GD_PC_HI20 == r_type |
4729 | 0 | || (R_LARCH_TLS_DESC_PC_HI20 == r_type |
4730 | 0 | && (i + 1 != sec->reloc_count) |
4731 | 0 | && ELF64_R_TYPE (rel[1].r_info) == R_LARCH_RELAX |
4732 | 0 | && ! loongarch_can_trans_tls (abfd, info, h, |
4733 | 0 | r_symndx, r_type))) |
4734 | 0 | { |
4735 | 0 | sym_sec = htab->elf.sgot; |
4736 | 0 | symval = elf_local_got_offsets (abfd)[r_symndx]; |
4737 | 0 | char tls_type = _bfd_loongarch_elf_tls_type (abfd, h, |
4738 | 0 | r_symndx); |
4739 | 0 | if (R_LARCH_TLS_DESC_PC_HI20 == r_type |
4740 | 0 | && GOT_TLS_GD_BOTH_P (tls_type)) |
4741 | 0 | symval += 2 * GOT_ENTRY_SIZE; |
4742 | 0 | } |
4743 | 0 | else if (sym->st_shndx == SHN_UNDEF || R_LARCH_ALIGN == r_type) |
4744 | 0 | { |
4745 | 0 | sym_sec = sec; |
4746 | 0 | symval = rel->r_offset; |
4747 | 0 | } |
4748 | 0 | else |
4749 | 0 | { |
4750 | 0 | sym_sec = elf_elfsections (abfd)[sym->st_shndx]->bfd_section; |
4751 | 0 | symval = sym->st_value; |
4752 | 0 | } |
4753 | 0 | symtype = ELF_ST_TYPE (sym->st_info); |
4754 | 0 | } |
4755 | 0 | else |
4756 | 0 | { |
4757 | 0 | r_symndx = ELF64_R_SYM (rel->r_info) - symtab_hdr->sh_info; |
4758 | 0 | h = elf_sym_hashes (abfd)[r_symndx]; |
4759 | |
|
4760 | 0 | while (h->root.type == bfd_link_hash_indirect |
4761 | 0 | || h->root.type == bfd_link_hash_warning) |
4762 | 0 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
4763 | | |
4764 | | /* Disable the relaxation for ifunc. */ |
4765 | 0 | if (h != NULL && h->type == STT_GNU_IFUNC) |
4766 | 0 | continue; |
4767 | | |
4768 | | /* The GOT entry of tls symbols must in current execute file or |
4769 | | shared object. */ |
4770 | 0 | if (R_LARCH_TLS_LD_PC_HI20 == r_type |
4771 | 0 | || R_LARCH_TLS_GD_PC_HI20 == r_type |
4772 | 0 | || (R_LARCH_TLS_DESC_PC_HI20 == r_type |
4773 | 0 | && (i + 1 != sec->reloc_count) |
4774 | 0 | && ELF64_R_TYPE (rel[1].r_info) == R_LARCH_RELAX |
4775 | 0 | && !loongarch_can_trans_tls (abfd, info, h, |
4776 | 0 | r_symndx, r_type))) |
4777 | 0 | { |
4778 | 0 | sym_sec = htab->elf.sgot; |
4779 | 0 | symval = h->got.offset; |
4780 | 0 | char tls_type = _bfd_loongarch_elf_tls_type (abfd, h, |
4781 | 0 | r_symndx); |
4782 | 0 | if (R_LARCH_TLS_DESC_PC_HI20 == r_type |
4783 | 0 | && GOT_TLS_GD_BOTH_P (tls_type)) |
4784 | 0 | symval += 2 * GOT_ENTRY_SIZE; |
4785 | 0 | } |
4786 | 0 | else if ((h->root.type == bfd_link_hash_defined |
4787 | 0 | || h->root.type == bfd_link_hash_defweak) |
4788 | 0 | && h->root.u.def.section != NULL |
4789 | 0 | && h->root.u.def.section->output_section != NULL) |
4790 | 0 | { |
4791 | 0 | symval = h->root.u.def.value; |
4792 | 0 | sym_sec = h->root.u.def.section; |
4793 | 0 | } |
4794 | 0 | else |
4795 | 0 | continue; |
4796 | | |
4797 | 0 | if (h && SYMBOL_REFERENCES_LOCAL (info, h)) |
4798 | 0 | local_got = true; |
4799 | 0 | symtype = h->type; |
4800 | 0 | } |
4801 | | |
4802 | 0 | if (sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE |
4803 | 0 | && (sym_sec->flags & SEC_MERGE)) |
4804 | 0 | { |
4805 | 0 | if (symtype == STT_SECTION) |
4806 | 0 | symval += rel->r_addend; |
4807 | |
|
4808 | 0 | symval = _bfd_merged_section_offset (abfd, &sym_sec, |
4809 | 0 | elf_section_data (sym_sec)->sec_info, |
4810 | 0 | symval); |
4811 | |
|
4812 | 0 | if (symtype != STT_SECTION) |
4813 | 0 | symval += rel->r_addend; |
4814 | 0 | } |
4815 | | /* For R_LARCH_ALIGN, symval is sec_addr (sec) + rel->r_offset |
4816 | | + (alingmeng - 4). |
4817 | | If r_symndx is 0, alignmeng-4 is r_addend. |
4818 | | If r_symndx > 0, alignment-4 is 2^(r_addend & 0xff)-4. */ |
4819 | 0 | else if (R_LARCH_ALIGN == r_type) |
4820 | 0 | if (r_symndx > 0) |
4821 | 0 | symval += ((1 << (rel->r_addend & 0xff)) - 4); |
4822 | 0 | else |
4823 | 0 | symval += rel->r_addend; |
4824 | 0 | else |
4825 | 0 | symval += rel->r_addend; |
4826 | |
|
4827 | 0 | symval += sec_addr (sym_sec); |
4828 | | |
4829 | | /* If the conditions for tls type transition are met, type |
4830 | | transition is performed instead of relax. |
4831 | | During the transition from DESC->IE/LE, there are 2 situations |
4832 | | depending on the different configurations of the relax/norelax |
4833 | | option. |
4834 | | If the -relax option is used, the extra nops will be removed, |
4835 | | and this transition is performed in pass 0. |
4836 | | If the --no-relax option is used, nop will be retained, and |
4837 | | this transition is performed in pass 1. */ |
4838 | 0 | if (IS_LOONGARCH_TLS_TRANS_RELOC (r_type) |
4839 | 0 | && (i + 1 != sec->reloc_count) |
4840 | 0 | && ELF64_R_TYPE (rel[1].r_info) == R_LARCH_RELAX |
4841 | 0 | && loongarch_can_trans_tls (abfd, info, h, r_symndx, r_type)) |
4842 | 0 | { |
4843 | 0 | loongarch_tls_perform_trans (abfd, sec, rel, h, info); |
4844 | 0 | r_type = ELF64_R_TYPE (rel->r_info); |
4845 | 0 | } |
4846 | |
|
4847 | 0 | switch (r_type) |
4848 | 0 | { |
4849 | 0 | case R_LARCH_ALIGN: |
4850 | 0 | if (1 == info->relax_pass) |
4851 | 0 | loongarch_relax_align (abfd, sec, sym_sec, info, rel, symval); |
4852 | 0 | break; |
4853 | | |
4854 | 0 | case R_LARCH_DELETE: |
4855 | 0 | if (1 == info->relax_pass) |
4856 | 0 | { |
4857 | 0 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, 4, info); |
4858 | 0 | rel->r_info = ELF64_R_INFO (0, R_LARCH_NONE); |
4859 | 0 | } |
4860 | 0 | break; |
4861 | 0 | case R_LARCH_CALL36: |
4862 | 0 | if (0 == info->relax_pass && (i + 2) <= sec->reloc_count) |
4863 | 0 | loongarch_relax_call36 (abfd, sec, rel, symval, info, again, |
4864 | 0 | max_alignment); |
4865 | 0 | break; |
4866 | | |
4867 | 0 | case R_LARCH_TLS_LE_HI20_R: |
4868 | 0 | case R_LARCH_TLS_LE_LO12_R: |
4869 | 0 | case R_LARCH_TLS_LE_ADD_R: |
4870 | 0 | case R_LARCH_TLS_LE_HI20: |
4871 | 0 | case R_LARCH_TLS_LE_LO12: |
4872 | 0 | case R_LARCH_TLS_LE64_LO20: |
4873 | 0 | case R_LARCH_TLS_LE64_HI12: |
4874 | 0 | if (0 == info->relax_pass && (i + 2) <= sec->reloc_count) |
4875 | 0 | loongarch_relax_tls_le (abfd, sec, rel, info, symval); |
4876 | 0 | break; |
4877 | | |
4878 | 0 | case R_LARCH_PCALA_HI20: |
4879 | 0 | if (0 == info->relax_pass && (i + 4) <= sec->reloc_count) |
4880 | 0 | loongarch_relax_pcala_addi (abfd, sec, sym_sec, rel, symval, |
4881 | 0 | info, again, max_alignment); |
4882 | 0 | break; |
4883 | | |
4884 | 0 | case R_LARCH_GOT_PC_HI20: |
4885 | 0 | if (local_got && 0 == info->relax_pass |
4886 | 0 | && (i + 4) <= sec->reloc_count) |
4887 | 0 | { |
4888 | 0 | if (loongarch_relax_pcala_ld (abfd, sec, rel)) |
4889 | 0 | loongarch_relax_pcala_addi (abfd, sec, sym_sec, rel, symval, |
4890 | 0 | info, again, max_alignment); |
4891 | 0 | } |
4892 | 0 | break; |
4893 | | |
4894 | 0 | case R_LARCH_TLS_LD_PC_HI20: |
4895 | 0 | case R_LARCH_TLS_GD_PC_HI20: |
4896 | 0 | case R_LARCH_TLS_DESC_PC_HI20: |
4897 | 0 | if (0 == info->relax_pass && (i + 4) <= sec->reloc_count) |
4898 | 0 | loongarch_relax_tls_ld_gd_desc (abfd, sec, sym_sec, rel, symval, |
4899 | 0 | info, again, max_alignment); |
4900 | 0 | break; |
4901 | | |
4902 | 0 | default: |
4903 | 0 | break; |
4904 | 0 | } |
4905 | 0 | } |
4906 | | |
4907 | 0 | return true; |
4908 | 0 | } |
4909 | | |
4910 | | /* Finish up dynamic symbol handling. We set the contents of various |
4911 | | dynamic sections here. */ |
4912 | | |
4913 | | static bool |
4914 | | loongarch_elf_finish_dynamic_symbol (bfd *output_bfd, |
4915 | | struct bfd_link_info *info, |
4916 | | struct elf_link_hash_entry *h, |
4917 | | Elf_Internal_Sym *sym) |
4918 | 0 | { |
4919 | 0 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); |
4920 | 0 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
4921 | |
|
4922 | 0 | if (h->plt.offset != MINUS_ONE) |
4923 | 0 | { |
4924 | 0 | size_t i, plt_idx; |
4925 | 0 | asection *plt, *gotplt, *relplt; |
4926 | 0 | bfd_vma got_address; |
4927 | 0 | uint32_t plt_entry[PLT_ENTRY_INSNS]; |
4928 | 0 | bfd_byte *loc; |
4929 | 0 | Elf_Internal_Rela rela; |
4930 | |
|
4931 | 0 | if (htab->elf.splt) |
4932 | 0 | { |
4933 | 0 | BFD_ASSERT ((h->type == STT_GNU_IFUNC |
4934 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4935 | 0 | || h->dynindx != -1); |
4936 | |
|
4937 | 0 | plt = htab->elf.splt; |
4938 | 0 | gotplt = htab->elf.sgotplt; |
4939 | 0 | if (h->type == STT_GNU_IFUNC && SYMBOL_REFERENCES_LOCAL (info, h)) |
4940 | 0 | relplt = htab->elf.srelgot; |
4941 | 0 | else |
4942 | 0 | relplt = htab->elf.srelplt; |
4943 | 0 | plt_idx = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
4944 | 0 | got_address = |
4945 | 0 | sec_addr (gotplt) + GOTPLT_HEADER_SIZE + plt_idx * GOT_ENTRY_SIZE; |
4946 | 0 | } |
4947 | 0 | else /* if (htab->elf.iplt) */ |
4948 | 0 | { |
4949 | 0 | BFD_ASSERT (h->type == STT_GNU_IFUNC |
4950 | 0 | && SYMBOL_REFERENCES_LOCAL (info, h)); |
4951 | |
|
4952 | 0 | plt = htab->elf.iplt; |
4953 | 0 | gotplt = htab->elf.igotplt; |
4954 | 0 | relplt = htab->elf.irelplt; |
4955 | 0 | plt_idx = h->plt.offset / PLT_ENTRY_SIZE; |
4956 | 0 | got_address = sec_addr (gotplt) + plt_idx * GOT_ENTRY_SIZE; |
4957 | 0 | } |
4958 | | |
4959 | | /* Find out where the .plt entry should go. */ |
4960 | 0 | loc = plt->contents + h->plt.offset; |
4961 | | |
4962 | | /* Fill in the PLT entry itself. */ |
4963 | 0 | if (!loongarch_make_plt_entry (got_address, |
4964 | 0 | sec_addr (plt) + h->plt.offset, |
4965 | 0 | plt_entry)) |
4966 | 0 | return false; |
4967 | | |
4968 | 0 | for (i = 0; i < PLT_ENTRY_INSNS; i++) |
4969 | 0 | bfd_put_32 (output_bfd, plt_entry[i], loc + 4 * i); |
4970 | | |
4971 | | /* Fill in the initial value of the got.plt entry. */ |
4972 | 0 | loc = gotplt->contents + (got_address - sec_addr (gotplt)); |
4973 | 0 | bfd_put_64 (output_bfd, sec_addr (plt), loc); |
4974 | |
|
4975 | 0 | rela.r_offset = got_address; |
4976 | | |
4977 | | /* TRUE if this is a PLT reference to a local IFUNC. */ |
4978 | 0 | if (PLT_LOCAL_IFUNC_P (info, h) |
4979 | 0 | && (relplt == htab->elf.srelgot |
4980 | 0 | || relplt == htab->elf.irelplt)) |
4981 | 0 | { |
4982 | 0 | rela.r_info = ELF64_R_INFO (0, R_LARCH_IRELATIVE); |
4983 | 0 | rela.r_addend = (h->root.u.def.value |
4984 | 0 | + h->root.u.def.section->output_section->vma |
4985 | 0 | + h->root.u.def.section->output_offset); |
4986 | |
|
4987 | 0 | loongarch_elf_append_rela (output_bfd, relplt, &rela); |
4988 | 0 | } |
4989 | 0 | else |
4990 | 0 | { |
4991 | | /* Fill in the entry in the rela.plt section. */ |
4992 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, R_LARCH_JUMP_SLOT); |
4993 | 0 | rela.r_addend = 0; |
4994 | 0 | loc = relplt->contents + plt_idx * sizeof (Elf64_External_Rela); |
4995 | 0 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
4996 | 0 | } |
4997 | |
|
4998 | 0 | if (!h->def_regular) |
4999 | 0 | { |
5000 | | /* Mark the symbol as undefined, rather than as defined in |
5001 | | the .plt section. Leave the value alone. */ |
5002 | 0 | sym->st_shndx = SHN_UNDEF; |
5003 | | /* If the symbol is weak, we do need to clear the value. |
5004 | | Otherwise, the PLT entry would provide a definition for |
5005 | | the symbol even if the symbol wasn't defined anywhere, |
5006 | | and so the symbol would never be NULL. */ |
5007 | 0 | if (!h->ref_regular_nonweak) |
5008 | 0 | sym->st_value = 0; |
5009 | 0 | } |
5010 | 0 | } |
5011 | | |
5012 | 0 | if (h->got.offset != MINUS_ONE |
5013 | | /* TLS got entry have been handled in elf_relocate_section. */ |
5014 | 0 | && !(loongarch_elf_hash_entry (h)->tls_type |
5015 | 0 | & (GOT_TLS_GD | GOT_TLS_IE | GOT_TLS_GDESC)) |
5016 | | /* Have allocated got entry but not allocated rela before. */ |
5017 | 0 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
5018 | 0 | { |
5019 | 0 | asection *sgot, *srela; |
5020 | 0 | Elf_Internal_Rela rela; |
5021 | 0 | bfd_vma off = h->got.offset & ~(bfd_vma)1; |
5022 | | |
5023 | | /* This symbol has an entry in the GOT. Set it up. */ |
5024 | 0 | sgot = htab->elf.sgot; |
5025 | 0 | srela = htab->elf.srelgot; |
5026 | 0 | BFD_ASSERT (sgot && srela); |
5027 | |
|
5028 | 0 | rela.r_offset = sec_addr (sgot) + off; |
5029 | |
|
5030 | 0 | if (h->def_regular |
5031 | 0 | && h->type == STT_GNU_IFUNC) |
5032 | 0 | { |
5033 | 0 | if(h->plt.offset == MINUS_ONE) |
5034 | 0 | { |
5035 | 0 | if (htab->elf.splt == NULL) |
5036 | 0 | srela = htab->elf.irelplt; |
5037 | |
|
5038 | 0 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
5039 | 0 | { |
5040 | 0 | asection *sec = h->root.u.def.section; |
5041 | 0 | rela.r_info = ELF64_R_INFO (0, R_LARCH_IRELATIVE); |
5042 | 0 | rela.r_addend = h->root.u.def.value + sec->output_section->vma |
5043 | 0 | + sec->output_offset; |
5044 | 0 | bfd_put_64 (output_bfd, 0, sgot->contents + off); |
5045 | 0 | } |
5046 | 0 | else |
5047 | 0 | { |
5048 | 0 | BFD_ASSERT (h->dynindx != -1); |
5049 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, R_LARCH_64); |
5050 | 0 | rela.r_addend = 0; |
5051 | 0 | bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + off); |
5052 | 0 | } |
5053 | 0 | } |
5054 | 0 | else if(bfd_link_pic (info)) |
5055 | 0 | { |
5056 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, R_LARCH_64); |
5057 | 0 | rela.r_addend = 0; |
5058 | 0 | bfd_put_64 (output_bfd, rela.r_addend, sgot->contents + off); |
5059 | 0 | } |
5060 | 0 | else |
5061 | 0 | { |
5062 | 0 | asection *plt; |
5063 | | /* For non-shared object, we can't use .got.plt, which |
5064 | | contains the real function address if we need pointer |
5065 | | equality. We load the GOT entry with the PLT entry. */ |
5066 | 0 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
5067 | 0 | bfd_put_64 (output_bfd, |
5068 | 0 | (plt->output_section->vma |
5069 | 0 | + plt->output_offset |
5070 | 0 | + h->plt.offset), |
5071 | 0 | sgot->contents + off); |
5072 | 0 | return true; |
5073 | 0 | } |
5074 | 0 | } |
5075 | 0 | else if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) |
5076 | 0 | { |
5077 | 0 | asection *sec = h->root.u.def.section; |
5078 | 0 | rela.r_info = ELF64_R_INFO (0, R_LARCH_RELATIVE); |
5079 | 0 | rela.r_addend = (h->root.u.def.value + sec->output_section->vma |
5080 | 0 | + sec->output_offset); |
5081 | 0 | } |
5082 | 0 | else |
5083 | 0 | { |
5084 | 0 | BFD_ASSERT (h->dynindx != -1); |
5085 | 0 | rela.r_info = ELF64_R_INFO (h->dynindx, R_LARCH_64); |
5086 | 0 | rela.r_addend = 0; |
5087 | 0 | } |
5088 | | |
5089 | 0 | loongarch_elf_append_rela (output_bfd, srela, &rela); |
5090 | 0 | } |
5091 | | |
5092 | | /* Mark some specially defined symbols as absolute. */ |
5093 | 0 | if (h == htab->elf.hdynamic || h == htab->elf.hgot || h == htab->elf.hplt) |
5094 | 0 | sym->st_shndx = SHN_ABS; |
5095 | |
|
5096 | 0 | return true; |
5097 | 0 | } |
5098 | | |
5099 | | /* Finish up the dynamic sections. */ |
5100 | | |
5101 | | static bool |
5102 | | loongarch_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, bfd *dynobj, |
5103 | | asection *sdyn) |
5104 | 0 | { |
5105 | 0 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); |
5106 | 0 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
5107 | 0 | size_t dynsize = bed->s->sizeof_dyn, skipped_size = 0; |
5108 | 0 | bfd_byte *dyncon, *dynconend; |
5109 | |
|
5110 | 0 | dynconend = sdyn->contents + sdyn->size; |
5111 | 0 | for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize) |
5112 | 0 | { |
5113 | 0 | Elf_Internal_Dyn dyn; |
5114 | 0 | asection *s; |
5115 | 0 | int skipped = 0; |
5116 | |
|
5117 | 0 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); |
5118 | |
|
5119 | 0 | switch (dyn.d_tag) |
5120 | 0 | { |
5121 | 0 | case DT_PLTGOT: |
5122 | 0 | s = htab->elf.sgotplt; |
5123 | 0 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
5124 | 0 | break; |
5125 | 0 | case DT_JMPREL: |
5126 | 0 | s = htab->elf.srelplt; |
5127 | 0 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
5128 | 0 | break; |
5129 | 0 | case DT_PLTRELSZ: |
5130 | 0 | s = htab->elf.srelplt; |
5131 | 0 | dyn.d_un.d_val = s->size; |
5132 | 0 | break; |
5133 | 0 | case DT_TEXTREL: |
5134 | 0 | if ((info->flags & DF_TEXTREL) == 0) |
5135 | 0 | skipped = 1; |
5136 | 0 | break; |
5137 | 0 | case DT_FLAGS: |
5138 | 0 | if ((info->flags & DF_TEXTREL) == 0) |
5139 | 0 | dyn.d_un.d_val &= ~DF_TEXTREL; |
5140 | 0 | break; |
5141 | 0 | } |
5142 | 0 | if (skipped) |
5143 | 0 | skipped_size += dynsize; |
5144 | 0 | else |
5145 | 0 | bed->s->swap_dyn_out (output_bfd, &dyn, dyncon - skipped_size); |
5146 | 0 | } |
5147 | | /* Wipe out any trailing entries if we shifted down a dynamic tag. */ |
5148 | 0 | memset (dyncon - skipped_size, 0, skipped_size); |
5149 | 0 | return true; |
5150 | 0 | } |
5151 | | |
5152 | | /* Finish up local dynamic symbol handling. We set the contents of |
5153 | | various dynamic sections here. */ |
5154 | | |
5155 | | static int |
5156 | | elf64_loongarch_finish_local_dynamic_symbol (void **slot, void *inf) |
5157 | 0 | { |
5158 | 0 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) *slot; |
5159 | 0 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
5160 | |
|
5161 | 0 | return loongarch_elf_finish_dynamic_symbol (info->output_bfd, info, h, NULL); |
5162 | 0 | } |
5163 | | |
5164 | | /* Value of struct elf_backend_data->elf_backend_output_arch_local_syms, |
5165 | | this function is called before elf_link_sort_relocs. |
5166 | | So relocation R_LARCH_IRELATIVE for local ifunc can be append to |
5167 | | .rela.dyn (.rela.got) by loongarch_elf_append_rela. */ |
5168 | | |
5169 | | static bool |
5170 | | elf_loongarch_output_arch_local_syms |
5171 | | (bfd *output_bfd ATTRIBUTE_UNUSED, |
5172 | | struct bfd_link_info *info, |
5173 | | void *flaginfo ATTRIBUTE_UNUSED, |
5174 | | int (*func) (void *, const char *, |
5175 | | Elf_Internal_Sym *, |
5176 | | asection *, |
5177 | | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) |
5178 | 0 | { |
5179 | 0 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); |
5180 | 0 | if (htab == NULL) |
5181 | 0 | return false; |
5182 | | |
5183 | | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5184 | 0 | htab_traverse (htab->loc_hash_table, |
5185 | 0 | elf64_loongarch_finish_local_dynamic_symbol, |
5186 | 0 | info); |
5187 | |
|
5188 | 0 | return true; |
5189 | 0 | } |
5190 | | |
5191 | | static bool |
5192 | | loongarch_elf_finish_dynamic_sections (bfd *output_bfd, |
5193 | | struct bfd_link_info *info) |
5194 | 0 | { |
5195 | 0 | bfd *dynobj; |
5196 | 0 | asection *sdyn, *plt, *gotplt = NULL; |
5197 | 0 | struct loongarch_elf_link_hash_table *htab; |
5198 | |
|
5199 | 0 | htab = loongarch_elf_hash_table (info); |
5200 | 0 | BFD_ASSERT (htab); |
5201 | 0 | dynobj = htab->elf.dynobj; |
5202 | 0 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5203 | |
|
5204 | 0 | if (elf_hash_table (info)->dynamic_sections_created) |
5205 | 0 | { |
5206 | 0 | BFD_ASSERT (htab->elf.splt && sdyn); |
5207 | |
|
5208 | 0 | if (!loongarch_finish_dyn (output_bfd, info, dynobj, sdyn)) |
5209 | 0 | return false; |
5210 | 0 | } |
5211 | | |
5212 | 0 | plt = htab->elf.splt; |
5213 | 0 | gotplt = htab->elf.sgotplt; |
5214 | |
|
5215 | 0 | if (plt && 0 < plt->size) |
5216 | 0 | { |
5217 | 0 | size_t i; |
5218 | 0 | uint32_t plt_header[PLT_HEADER_INSNS]; |
5219 | 0 | if (!loongarch_make_plt_header (sec_addr (gotplt), sec_addr (plt), |
5220 | 0 | plt_header)) |
5221 | 0 | return false; |
5222 | | |
5223 | 0 | for (i = 0; i < PLT_HEADER_INSNS; i++) |
5224 | 0 | bfd_put_32 (output_bfd, plt_header[i], plt->contents + 4 * i); |
5225 | |
|
5226 | 0 | elf_section_data (plt->output_section)->this_hdr.sh_entsize = |
5227 | 0 | PLT_ENTRY_SIZE; |
5228 | 0 | } |
5229 | | |
5230 | 0 | if (htab->elf.sgotplt) |
5231 | 0 | { |
5232 | 0 | asection *output_section = htab->elf.sgotplt->output_section; |
5233 | |
|
5234 | 0 | if (bfd_is_abs_section (output_section)) |
5235 | 0 | { |
5236 | 0 | _bfd_error_handler (_("discarded output section: `%pA'"), |
5237 | 0 | htab->elf.sgotplt); |
5238 | 0 | return false; |
5239 | 0 | } |
5240 | | |
5241 | 0 | if (0 < htab->elf.sgotplt->size) |
5242 | 0 | { |
5243 | | /* Write the first two entries in .got.plt, needed for the dynamic |
5244 | | linker. */ |
5245 | 0 | bfd_put_64 (output_bfd, MINUS_ONE, htab->elf.sgotplt->contents); |
5246 | |
|
5247 | 0 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
5248 | 0 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
5249 | 0 | } |
5250 | |
|
5251 | 0 | elf_section_data (output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
5252 | 0 | } |
5253 | | |
5254 | 0 | if (htab->elf.sgot) |
5255 | 0 | { |
5256 | 0 | asection *output_section = htab->elf.sgot->output_section; |
5257 | |
|
5258 | 0 | if (0 < htab->elf.sgot->size) |
5259 | 0 | { |
5260 | | /* Set the first entry in the global offset table to the address of |
5261 | | the dynamic section. */ |
5262 | 0 | bfd_vma val = sdyn ? sec_addr (sdyn) : 0; |
5263 | 0 | bfd_put_64 (output_bfd, val, htab->elf.sgot->contents); |
5264 | 0 | } |
5265 | |
|
5266 | 0 | elf_section_data (output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; |
5267 | 0 | } |
5268 | |
|
5269 | 0 | return true; |
5270 | 0 | } |
5271 | | |
5272 | | /* Return address for Ith PLT stub in section PLT, for relocation REL |
5273 | | or (bfd_vma) -1 if it should not be included. */ |
5274 | | |
5275 | | static bfd_vma |
5276 | | loongarch_elf_plt_sym_val (bfd_vma i, const asection *plt, |
5277 | | const arelent *rel ATTRIBUTE_UNUSED) |
5278 | 0 | { |
5279 | 0 | return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE; |
5280 | 0 | } |
5281 | | |
5282 | | static enum elf_reloc_type_class |
5283 | | loongarch_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
5284 | | const asection *rel_sec ATTRIBUTE_UNUSED, |
5285 | | const Elf_Internal_Rela *rela) |
5286 | 0 | { |
5287 | 0 | struct loongarch_elf_link_hash_table *htab; |
5288 | 0 | htab = loongarch_elf_hash_table (info); |
5289 | |
|
5290 | 0 | if (htab->elf.dynsym != NULL && htab->elf.dynsym->contents != NULL) |
5291 | 0 | { |
5292 | | /* Check relocation against STT_GNU_IFUNC symbol if there are |
5293 | | dynamic symbols. */ |
5294 | 0 | bfd *abfd = info->output_bfd; |
5295 | 0 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
5296 | 0 | unsigned long r_symndx = ELF64_R_SYM (rela->r_info); |
5297 | 0 | if (r_symndx != STN_UNDEF) |
5298 | 0 | { |
5299 | 0 | Elf_Internal_Sym sym; |
5300 | 0 | if (!bed->s->swap_symbol_in (abfd, |
5301 | 0 | htab->elf.dynsym->contents |
5302 | 0 | + r_symndx * bed->s->sizeof_sym, |
5303 | 0 | 0, &sym)) |
5304 | 0 | { |
5305 | | /* xgettext:c-format */ |
5306 | 0 | _bfd_error_handler (_("%pB symbol number %lu references" |
5307 | 0 | " nonexistent SHT_SYMTAB_SHNDX section"), |
5308 | 0 | abfd, r_symndx); |
5309 | | /* Ideally an error class should be returned here. */ |
5310 | 0 | } |
5311 | 0 | else if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5312 | 0 | return reloc_class_ifunc; |
5313 | 0 | } |
5314 | 0 | } |
5315 | | |
5316 | 0 | switch (ELF64_R_TYPE (rela->r_info)) |
5317 | 0 | { |
5318 | 0 | case R_LARCH_IRELATIVE: |
5319 | 0 | return reloc_class_ifunc; |
5320 | 0 | case R_LARCH_RELATIVE: |
5321 | 0 | return reloc_class_relative; |
5322 | 0 | case R_LARCH_JUMP_SLOT: |
5323 | 0 | return reloc_class_plt; |
5324 | 0 | case R_LARCH_COPY: |
5325 | 0 | return reloc_class_copy; |
5326 | 0 | default: |
5327 | 0 | return reloc_class_normal; |
5328 | 0 | } |
5329 | 0 | } |
5330 | | |
5331 | | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
5332 | | |
5333 | | static void |
5334 | | loongarch_elf_copy_indirect_symbol (struct bfd_link_info *info, |
5335 | | struct elf_link_hash_entry *dir, |
5336 | | struct elf_link_hash_entry *ind) |
5337 | 0 | { |
5338 | 0 | struct elf_link_hash_entry *edir, *eind; |
5339 | |
|
5340 | 0 | edir = dir; |
5341 | 0 | eind = ind; |
5342 | |
|
5343 | 0 | if (eind->dyn_relocs != NULL) |
5344 | 0 | { |
5345 | 0 | if (edir->dyn_relocs != NULL) |
5346 | 0 | { |
5347 | 0 | struct elf_dyn_relocs **pp; |
5348 | 0 | struct elf_dyn_relocs *p; |
5349 | | |
5350 | | /* Add reloc counts against the indirect sym to the direct sym |
5351 | | list. Merge any entries against the same section. */ |
5352 | 0 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) |
5353 | 0 | { |
5354 | 0 | struct elf_dyn_relocs *q; |
5355 | |
|
5356 | 0 | for (q = edir->dyn_relocs; q != NULL; q = q->next) |
5357 | 0 | if (q->sec == p->sec) |
5358 | 0 | { |
5359 | 0 | q->pc_count += p->pc_count; |
5360 | 0 | q->count += p->count; |
5361 | 0 | *pp = p->next; |
5362 | 0 | break; |
5363 | 0 | } |
5364 | 0 | if (q == NULL) |
5365 | 0 | pp = &p->next; |
5366 | 0 | } |
5367 | 0 | *pp = edir->dyn_relocs; |
5368 | 0 | } |
5369 | |
|
5370 | 0 | edir->dyn_relocs = eind->dyn_relocs; |
5371 | 0 | eind->dyn_relocs = NULL; |
5372 | 0 | } |
5373 | |
|
5374 | 0 | if (ind->root.type == bfd_link_hash_indirect && dir->got.refcount < 0) |
5375 | 0 | { |
5376 | 0 | loongarch_elf_hash_entry(edir)->tls_type |
5377 | 0 | = loongarch_elf_hash_entry(eind)->tls_type; |
5378 | 0 | loongarch_elf_hash_entry(eind)->tls_type = GOT_UNKNOWN; |
5379 | 0 | } |
5380 | 0 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
5381 | 0 | } |
5382 | | |
5383 | 0 | #define PRSTATUS_SIZE 0x1d8 |
5384 | | #define PRSTATUS_OFFSET_PR_CURSIG 0xc |
5385 | | #define PRSTATUS_OFFSET_PR_PID 0x20 |
5386 | 0 | #define ELF_GREGSET_T_SIZE 0x168 |
5387 | 0 | #define PRSTATUS_OFFSET_PR_REG 0x70 |
5388 | | |
5389 | | /* Support for core dump NOTE sections. */ |
5390 | | |
5391 | | static bool |
5392 | | loongarch_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
5393 | 0 | { |
5394 | 0 | switch (note->descsz) |
5395 | 0 | { |
5396 | 0 | default: |
5397 | 0 | return false; |
5398 | | |
5399 | | /* The sizeof (struct elf_prstatus) on Linux/LoongArch. */ |
5400 | 0 | case PRSTATUS_SIZE: |
5401 | | /* pr_cursig */ |
5402 | 0 | elf_tdata (abfd)->core->signal = |
5403 | 0 | bfd_get_16 (abfd, note->descdata + PRSTATUS_OFFSET_PR_CURSIG); |
5404 | | |
5405 | | /* pr_pid */ |
5406 | 0 | elf_tdata (abfd)->core->lwpid = |
5407 | 0 | bfd_get_32 (abfd, note->descdata + PRSTATUS_OFFSET_PR_PID); |
5408 | 0 | break; |
5409 | 0 | } |
5410 | | |
5411 | | /* Make a ".reg/999" section. */ |
5412 | 0 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", ELF_GREGSET_T_SIZE, |
5413 | 0 | note->descpos |
5414 | 0 | + PRSTATUS_OFFSET_PR_REG); |
5415 | 0 | } |
5416 | | |
5417 | 0 | #define PRPSINFO_SIZE 0x88 |
5418 | | #define PRPSINFO_OFFSET_PR_PID 0x18 |
5419 | 0 | #define PRPSINFO_OFFSET_PR_FNAME 0x28 |
5420 | 0 | #define PRPSINFO_SIZEOF_PR_FNAME 0x10 |
5421 | 0 | #define PRPSINFO_OFFSET_PR_PS_ARGS 0x38 |
5422 | 0 | #define PRPSINFO_SIZEOF_PR_PS_ARGS 0x50 |
5423 | | |
5424 | | static bool |
5425 | | loongarch_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
5426 | 0 | { |
5427 | 0 | switch (note->descsz) |
5428 | 0 | { |
5429 | 0 | default: |
5430 | 0 | return false; |
5431 | | |
5432 | | /* The sizeof (prpsinfo_t) on Linux/LoongArch. */ |
5433 | 0 | case PRPSINFO_SIZE: |
5434 | | /* pr_pid */ |
5435 | 0 | elf_tdata (abfd)->core->pid = |
5436 | 0 | bfd_get_32 (abfd, note->descdata + PRPSINFO_OFFSET_PR_PID); |
5437 | | |
5438 | | /* pr_fname */ |
5439 | 0 | elf_tdata (abfd)->core->program = |
5440 | 0 | _bfd_elfcore_strndup (abfd, note->descdata + PRPSINFO_OFFSET_PR_FNAME, |
5441 | 0 | PRPSINFO_SIZEOF_PR_FNAME); |
5442 | | |
5443 | | /* pr_psargs */ |
5444 | 0 | elf_tdata (abfd)->core->command = |
5445 | 0 | _bfd_elfcore_strndup (abfd, note->descdata + PRPSINFO_OFFSET_PR_PS_ARGS, |
5446 | 0 | PRPSINFO_SIZEOF_PR_PS_ARGS); |
5447 | 0 | break; |
5448 | 0 | } |
5449 | | |
5450 | | /* Note that for some reason, a spurious space is tacked |
5451 | | onto the end of the args in some (at least one anyway) |
5452 | | implementations, so strip it off if it exists. */ |
5453 | | |
5454 | 0 | { |
5455 | 0 | char *command = elf_tdata (abfd)->core->command; |
5456 | 0 | int n = strlen (command); |
5457 | |
|
5458 | 0 | if (0 < n && command[n - 1] == ' ') |
5459 | 0 | command[n - 1] = '\0'; |
5460 | 0 | } |
5461 | |
|
5462 | 0 | return true; |
5463 | 0 | } |
5464 | | |
5465 | | /* Set the right mach type. */ |
5466 | | static bool |
5467 | | loongarch_elf_object_p (bfd *abfd) |
5468 | 1.00k | { |
5469 | | /* There are only two mach types in LoongArch currently. */ |
5470 | 1.00k | if (strcmp (abfd->xvec->name, "elf64-loongarch") == 0) |
5471 | 1.00k | bfd_default_set_arch_mach (abfd, bfd_arch_loongarch, bfd_mach_loongarch64); |
5472 | 0 | else |
5473 | 0 | bfd_default_set_arch_mach (abfd, bfd_arch_loongarch, bfd_mach_loongarch32); |
5474 | 1.00k | return true; |
5475 | 1.00k | } |
5476 | | |
5477 | | static asection * |
5478 | | loongarch_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info, |
5479 | | Elf_Internal_Rela *rel, |
5480 | | struct elf_link_hash_entry *h, |
5481 | | Elf_Internal_Sym *sym) |
5482 | 0 | { |
5483 | 0 | if (h != NULL) |
5484 | 0 | switch (ELF64_R_TYPE (rel->r_info)) |
5485 | 0 | { |
5486 | 0 | case R_LARCH_GNU_VTINHERIT: |
5487 | 0 | case R_LARCH_GNU_VTENTRY: |
5488 | 0 | return NULL; |
5489 | 0 | } |
5490 | | |
5491 | 0 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
5492 | 0 | } |
5493 | | |
5494 | | /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For |
5495 | | executable PLT slots where the executable never takes the address of those |
5496 | | functions, the function symbols are not added to the hash table. */ |
5497 | | |
5498 | | static bool |
5499 | | elf_loongarch64_hash_symbol (struct elf_link_hash_entry *h) |
5500 | 0 | { |
5501 | 0 | if (h->plt.offset != (bfd_vma) -1 |
5502 | 0 | && !h->def_regular |
5503 | 0 | && !h->pointer_equality_needed) |
5504 | 0 | return false; |
5505 | | |
5506 | 0 | return _bfd_elf_hash_symbol (h); |
5507 | 0 | } |
5508 | | |
5509 | | /* If a relocation is rela_normal and the symbol associated with the |
5510 | | relocation is STT_SECTION type, the addend of the relocation would add |
5511 | | sec->output_offset when partial linking (ld -r). |
5512 | | See elf_backend_data.rela_normal and elf_link_input_bfd(). |
5513 | | The addend of R_LARCH_ALIGN is used to represent the first and third |
5514 | | expression of .align, it should be a constant when linking. */ |
5515 | | |
5516 | | static bool |
5517 | | loongarch_elf_is_rela_normal (Elf_Internal_Rela *rel) |
5518 | 0 | { |
5519 | 0 | if (R_LARCH_ALIGN == ELF64_R_TYPE (rel->r_info)) |
5520 | 0 | return false; |
5521 | 0 | return true; |
5522 | 0 | } |
5523 | | |
5524 | | #define TARGET_LITTLE_SYM loongarch_elf64_vec |
5525 | | #define TARGET_LITTLE_NAME "elf64-loongarch" |
5526 | | #define ELF_ARCH bfd_arch_loongarch |
5527 | | #define ELF_TARGET_ID LARCH_ELF_DATA |
5528 | | #define ELF_MACHINE_CODE EM_LOONGARCH |
5529 | | #define ELF_MAXPAGESIZE 0x4000 |
5530 | | #define bfd_elf64_bfd_reloc_type_lookup loongarch_reloc_type_lookup |
5531 | | #define bfd_elf64_bfd_link_hash_table_create \ |
5532 | | loongarch_elf_link_hash_table_create |
5533 | | #define bfd_elf64_bfd_reloc_name_lookup loongarch_reloc_name_lookup |
5534 | | #define elf_info_to_howto_rel NULL /* Fall through to elf_info_to_howto. */ |
5535 | | #define elf_info_to_howto loongarch_info_to_howto_rela |
5536 | | #define bfd_elf64_bfd_merge_private_bfd_data \ |
5537 | | elf64_loongarch_merge_private_bfd_data |
5538 | | |
5539 | | #define elf_backend_reloc_type_class loongarch_reloc_type_class |
5540 | | #define elf_backend_copy_indirect_symbol loongarch_elf_copy_indirect_symbol |
5541 | | #define elf_backend_create_dynamic_sections \ |
5542 | | loongarch_elf_create_dynamic_sections |
5543 | | #define elf_backend_check_relocs loongarch_elf_check_relocs |
5544 | | #define elf_backend_adjust_dynamic_symbol loongarch_elf_adjust_dynamic_symbol |
5545 | | #define elf_backend_late_size_sections loongarch_elf_late_size_sections |
5546 | | #define elf_backend_relocate_section loongarch_elf_relocate_section |
5547 | | #define elf_backend_finish_dynamic_symbol loongarch_elf_finish_dynamic_symbol |
5548 | | #define elf_backend_output_arch_local_syms \ |
5549 | | elf_loongarch_output_arch_local_syms |
5550 | | #define elf_backend_finish_dynamic_sections \ |
5551 | | loongarch_elf_finish_dynamic_sections |
5552 | | #define elf_backend_object_p loongarch_elf_object_p |
5553 | | #define elf_backend_gc_mark_hook loongarch_elf_gc_mark_hook |
5554 | | #define elf_backend_plt_sym_val loongarch_elf_plt_sym_val |
5555 | | #define elf_backend_grok_prstatus loongarch_elf_grok_prstatus |
5556 | | #define elf_backend_grok_psinfo loongarch_elf_grok_psinfo |
5557 | | #define elf_backend_hash_symbol elf_loongarch64_hash_symbol |
5558 | | #define bfd_elf64_bfd_relax_section loongarch_elf_relax_section |
5559 | | #define elf_backend_is_rela_normal loongarch_elf_is_rela_normal |
5560 | | |
5561 | | #define elf_backend_dtrel_excludes_plt 1 |
5562 | | |
5563 | | #include "elf64-target.h" |