/src/binutils-gdb/bfd/elf32-lm32.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* Lattice Mico32-specific support for 32-bit ELF |
2 | | Copyright (C) 2008-2025 Free Software Foundation, Inc. |
3 | | Contributed by Jon Beniston <jon@beniston.com> |
4 | | |
5 | | This file is part of BFD, the Binary File Descriptor library. |
6 | | |
7 | | This program is free software; you can redistribute it and/or modify |
8 | | it under the terms of the GNU General Public License as published by |
9 | | the Free Software Foundation; either version 3 of the License, or |
10 | | (at your option) any later version. |
11 | | |
12 | | This program is distributed in the hope that it will be useful, |
13 | | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | | GNU General Public License for more details. |
16 | | |
17 | | You should have received a copy of the GNU General Public License |
18 | | along with this program; if not, write to the Free Software |
19 | | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | | MA 02110-1301, USA. */ |
21 | | |
22 | | #include "sysdep.h" |
23 | | #include "bfd.h" |
24 | | #include "libbfd.h" |
25 | | #include "elf-bfd.h" |
26 | | #include "elf/lm32.h" |
27 | | |
28 | 0 | #define DEFAULT_STACK_SIZE 0x20000 |
29 | | |
30 | 0 | #define PLT_ENTRY_SIZE 20 |
31 | | |
32 | | #define PLT0_ENTRY_WORD0 0 |
33 | | #define PLT0_ENTRY_WORD1 0 |
34 | | #define PLT0_ENTRY_WORD2 0 |
35 | | #define PLT0_ENTRY_WORD3 0 |
36 | | #define PLT0_ENTRY_WORD4 0 |
37 | | |
38 | | #define PLT0_PIC_ENTRY_WORD0 0 |
39 | | #define PLT0_PIC_ENTRY_WORD1 0 |
40 | | #define PLT0_PIC_ENTRY_WORD2 0 |
41 | | #define PLT0_PIC_ENTRY_WORD3 0 |
42 | | #define PLT0_PIC_ENTRY_WORD4 0 |
43 | | |
44 | 0 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" |
45 | | |
46 | | extern const bfd_target lm32_elf32_fdpic_vec; |
47 | | |
48 | 0 | #define IS_FDPIC(bfd) ((bfd)->xvec == &lm32_elf32_fdpic_vec) |
49 | | |
50 | | static bfd_reloc_status_type lm32_elf_gprel_reloc |
51 | | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
52 | | |
53 | | /* lm32 ELF linker hash table. */ |
54 | | |
55 | | struct elf_lm32_link_hash_table |
56 | | { |
57 | | struct elf_link_hash_table root; |
58 | | |
59 | | /* Short-cuts to get to dynamic linker sections. */ |
60 | | asection *sfixup32; |
61 | | asection *sdynbss; |
62 | | asection *srelbss; |
63 | | |
64 | | int relocs32; |
65 | | }; |
66 | | |
67 | | /* Get the lm32 ELF linker hash table from a link_info structure. */ |
68 | | |
69 | | #define lm32_elf_hash_table(p) \ |
70 | 0 | ((is_elf_hash_table ((p)->hash) \ |
71 | 0 | && elf_hash_table_id (elf_hash_table (p)) == LM32_ELF_DATA) \ |
72 | 0 | ? (struct elf_lm32_link_hash_table *) (p)->hash : NULL) |
73 | | |
74 | | #define lm32fdpic_got_section(info) \ |
75 | | (lm32_elf_hash_table (info)->root.sgot) |
76 | | #define lm32fdpic_gotrel_section(info) \ |
77 | | (lm32_elf_hash_table (info)->root.srelgot) |
78 | | #define lm32fdpic_fixup32_section(info) \ |
79 | 0 | (lm32_elf_hash_table (info)->sfixup32) |
80 | | |
81 | | struct weak_symbol_list |
82 | | { |
83 | | const char *name; |
84 | | struct weak_symbol_list *next; |
85 | | }; |
86 | | |
87 | | /* Create an lm32 ELF linker hash table. */ |
88 | | |
89 | | static struct bfd_link_hash_table * |
90 | | lm32_elf_link_hash_table_create (bfd *abfd) |
91 | 0 | { |
92 | 0 | struct elf_lm32_link_hash_table *ret; |
93 | 0 | size_t amt = sizeof (struct elf_lm32_link_hash_table); |
94 | |
|
95 | 0 | ret = bfd_zmalloc (amt); |
96 | 0 | if (ret == NULL) |
97 | 0 | return NULL; |
98 | | |
99 | 0 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
100 | 0 | _bfd_elf_link_hash_newfunc, |
101 | 0 | sizeof (struct elf_link_hash_entry))) |
102 | 0 | { |
103 | 0 | free (ret); |
104 | 0 | return NULL; |
105 | 0 | } |
106 | | |
107 | 0 | return &ret->root.root; |
108 | 0 | } |
109 | | |
110 | | /* Add a fixup to the ROFIXUP section. */ |
111 | | |
112 | | static bfd_vma |
113 | | _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation) |
114 | 0 | { |
115 | 0 | bfd_vma fixup_offset; |
116 | |
|
117 | 0 | if (rofixup->flags & SEC_EXCLUDE) |
118 | 0 | return -1; |
119 | | |
120 | 0 | fixup_offset = rofixup->reloc_count * 4; |
121 | 0 | if (rofixup->contents) |
122 | 0 | { |
123 | 0 | BFD_ASSERT (fixup_offset < rofixup->size); |
124 | 0 | if (fixup_offset < rofixup->size) |
125 | 0 | bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset); |
126 | 0 | } |
127 | 0 | rofixup->reloc_count++; |
128 | |
|
129 | 0 | return fixup_offset; |
130 | 0 | } |
131 | | |
132 | | /* Create .rofixup sections in DYNOBJ, and set up |
133 | | shortcuts to them in our hash table. */ |
134 | | |
135 | | static bool |
136 | | create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) |
137 | 0 | { |
138 | 0 | struct elf_lm32_link_hash_table *htab; |
139 | 0 | htab = lm32_elf_hash_table (info); |
140 | |
|
141 | 0 | if (htab == NULL) |
142 | 0 | return false; |
143 | | |
144 | | /* Fixup section for R_LM32_32 relocs. */ |
145 | 0 | lm32fdpic_fixup32_section (info) |
146 | 0 | = bfd_make_section_anyway_with_flags (dynobj, |
147 | 0 | ".rofixup", |
148 | 0 | (SEC_ALLOC |
149 | 0 | | SEC_LOAD |
150 | 0 | | SEC_HAS_CONTENTS |
151 | 0 | | SEC_IN_MEMORY |
152 | 0 | | SEC_LINKER_CREATED |
153 | 0 | | SEC_READONLY)); |
154 | 0 | if (lm32fdpic_fixup32_section (info) == NULL |
155 | 0 | || !bfd_set_section_alignment (lm32fdpic_fixup32_section (info), 2)) |
156 | 0 | return false; |
157 | | |
158 | 0 | return true; |
159 | 0 | } |
160 | | |
161 | | static reloc_howto_type lm32_elf_howto_table [] = |
162 | | { |
163 | | /* This reloc does nothing. */ |
164 | | HOWTO (R_LM32_NONE, /* type */ |
165 | | 0, /* rightshift */ |
166 | | 0, /* size */ |
167 | | 0, /* bitsize */ |
168 | | false, /* pc_relative */ |
169 | | 0, /* bitpos */ |
170 | | complain_overflow_dont, /* complain_on_overflow */ |
171 | | bfd_elf_generic_reloc, /* special_function */ |
172 | | "R_LM32_NONE", /* name */ |
173 | | false, /* partial_inplace */ |
174 | | 0, /* src_mask */ |
175 | | 0, /* dst_mask */ |
176 | | false), /* pcrel_offset */ |
177 | | |
178 | | /* An 8 bit absolute relocation. */ |
179 | | HOWTO (R_LM32_8, /* type */ |
180 | | 0, /* rightshift */ |
181 | | 1, /* size */ |
182 | | 8, /* bitsize */ |
183 | | false, /* pc_relative */ |
184 | | 0, /* bitpos */ |
185 | | complain_overflow_bitfield,/* complain_on_overflow */ |
186 | | bfd_elf_generic_reloc, /* special_function */ |
187 | | "R_LM32_8", /* name */ |
188 | | false, /* partial_inplace */ |
189 | | 0, /* src_mask */ |
190 | | 0xff, /* dst_mask */ |
191 | | false), /* pcrel_offset */ |
192 | | |
193 | | /* A 16 bit absolute relocation. */ |
194 | | HOWTO (R_LM32_16, /* type */ |
195 | | 0, /* rightshift */ |
196 | | 2, /* size */ |
197 | | 16, /* bitsize */ |
198 | | false, /* pc_relative */ |
199 | | 0, /* bitpos */ |
200 | | complain_overflow_bitfield,/* complain_on_overflow */ |
201 | | bfd_elf_generic_reloc, /* special_function */ |
202 | | "R_LM32_16", /* name */ |
203 | | false, /* partial_inplace */ |
204 | | 0, /* src_mask */ |
205 | | 0xffff, /* dst_mask */ |
206 | | false), /* pcrel_offset */ |
207 | | |
208 | | /* A 32 bit absolute relocation. */ |
209 | | HOWTO (R_LM32_32, /* type */ |
210 | | 0, /* rightshift */ |
211 | | 4, /* size */ |
212 | | 32, /* bitsize */ |
213 | | false, /* pc_relative */ |
214 | | 0, /* bitpos */ |
215 | | complain_overflow_bitfield,/* complain_on_overflow */ |
216 | | bfd_elf_generic_reloc, /* special_function */ |
217 | | "R_LM32_32", /* name */ |
218 | | false, /* partial_inplace */ |
219 | | 0, /* src_mask */ |
220 | | 0xffffffff, /* dst_mask */ |
221 | | false), /* pcrel_offset */ |
222 | | |
223 | | HOWTO (R_LM32_HI16, /* type */ |
224 | | 16, /* rightshift */ |
225 | | 4, /* size */ |
226 | | 16, /* bitsize */ |
227 | | false, /* pc_relative */ |
228 | | 0, /* bitpos */ |
229 | | complain_overflow_bitfield,/* complain_on_overflow */ |
230 | | bfd_elf_generic_reloc, /* special_function */ |
231 | | "R_LM32_HI16", /* name */ |
232 | | false, /* partial_inplace */ |
233 | | 0, /* src_mask */ |
234 | | 0xffff, /* dst_mask */ |
235 | | false), /* pcrel_offset */ |
236 | | |
237 | | HOWTO (R_LM32_LO16, /* type */ |
238 | | 0, /* rightshift */ |
239 | | 4, /* size */ |
240 | | 16, /* bitsize */ |
241 | | false, /* pc_relative */ |
242 | | 0, /* bitpos */ |
243 | | complain_overflow_dont, /* complain_on_overflow */ |
244 | | bfd_elf_generic_reloc, /* special_function */ |
245 | | "R_LM32_LO16", /* name */ |
246 | | false, /* partial_inplace */ |
247 | | 0, /* src_mask */ |
248 | | 0xffff, /* dst_mask */ |
249 | | false), /* pcrel_offset */ |
250 | | |
251 | | HOWTO (R_LM32_GPREL16, /* type */ |
252 | | 0, /* rightshift */ |
253 | | 4, /* size */ |
254 | | 16, /* bitsize */ |
255 | | false, /* pc_relative */ |
256 | | 0, /* bitpos */ |
257 | | complain_overflow_dont, /* complain_on_overflow */ |
258 | | lm32_elf_gprel_reloc, /* special_function */ |
259 | | "R_LM32_GPREL16", /* name */ |
260 | | false, /* partial_inplace */ |
261 | | 0, /* src_mask */ |
262 | | 0xffff, /* dst_mask */ |
263 | | false), /* pcrel_offset */ |
264 | | |
265 | | HOWTO (R_LM32_CALL, /* type */ |
266 | | 2, /* rightshift */ |
267 | | 4, /* size */ |
268 | | 26, /* bitsize */ |
269 | | true, /* pc_relative */ |
270 | | 0, /* bitpos */ |
271 | | complain_overflow_signed, /* complain_on_overflow */ |
272 | | bfd_elf_generic_reloc, /* special_function */ |
273 | | "R_LM32_CALL", /* name */ |
274 | | false, /* partial_inplace */ |
275 | | 0, /* src_mask */ |
276 | | 0x3ffffff, /* dst_mask */ |
277 | | true), /* pcrel_offset */ |
278 | | |
279 | | HOWTO (R_LM32_BRANCH, /* type */ |
280 | | 2, /* rightshift */ |
281 | | 4, /* size */ |
282 | | 16, /* bitsize */ |
283 | | true, /* pc_relative */ |
284 | | 0, /* bitpos */ |
285 | | complain_overflow_signed, /* complain_on_overflow */ |
286 | | bfd_elf_generic_reloc, /* special_function */ |
287 | | "R_LM32_BRANCH", /* name */ |
288 | | false, /* partial_inplace */ |
289 | | 0, /* src_mask */ |
290 | | 0xffff, /* dst_mask */ |
291 | | true), /* pcrel_offset */ |
292 | | |
293 | | /* GNU extension to record C++ vtable hierarchy. */ |
294 | | HOWTO (R_LM32_GNU_VTINHERIT, /* type */ |
295 | | 0, /* rightshift */ |
296 | | 4, /* size */ |
297 | | 0, /* bitsize */ |
298 | | false, /* pc_relative */ |
299 | | 0, /* bitpos */ |
300 | | complain_overflow_dont, /* complain_on_overflow */ |
301 | | NULL, /* special_function */ |
302 | | "R_LM32_GNU_VTINHERIT", /* name */ |
303 | | false, /* partial_inplace */ |
304 | | 0, /* src_mask */ |
305 | | 0, /* dst_mask */ |
306 | | false), /* pcrel_offset */ |
307 | | |
308 | | /* GNU extension to record C++ vtable member usage. */ |
309 | | HOWTO (R_LM32_GNU_VTENTRY, /* type */ |
310 | | 0, /* rightshift */ |
311 | | 4, /* size */ |
312 | | 0, /* bitsize */ |
313 | | false, /* pc_relative */ |
314 | | 0, /* bitpos */ |
315 | | complain_overflow_dont, /* complain_on_overflow */ |
316 | | _bfd_elf_rel_vtable_reloc_fn,/* special_function */ |
317 | | "R_LM32_GNU_VTENTRY", /* name */ |
318 | | false, /* partial_inplace */ |
319 | | 0, /* src_mask */ |
320 | | 0, /* dst_mask */ |
321 | | false), /* pcrel_offset */ |
322 | | |
323 | | HOWTO (R_LM32_16_GOT, /* type */ |
324 | | 0, /* rightshift */ |
325 | | 4, /* size */ |
326 | | 16, /* bitsize */ |
327 | | false, /* pc_relative */ |
328 | | 0, /* bitpos */ |
329 | | complain_overflow_signed, /* complain_on_overflow */ |
330 | | bfd_elf_generic_reloc, /* special_function */ |
331 | | "R_LM32_16_GOT", /* name */ |
332 | | false, /* partial_inplace */ |
333 | | 0, /* src_mask */ |
334 | | 0xffff, /* dst_mask */ |
335 | | false), /* pcrel_offset */ |
336 | | |
337 | | HOWTO (R_LM32_GOTOFF_HI16, /* type */ |
338 | | 16, /* rightshift */ |
339 | | 4, /* size */ |
340 | | 16, /* bitsize */ |
341 | | false, /* pc_relative */ |
342 | | 0, /* bitpos */ |
343 | | complain_overflow_dont, /* complain_on_overflow */ |
344 | | bfd_elf_generic_reloc, /* special_function */ |
345 | | "R_LM32_GOTOFF_HI16", /* name */ |
346 | | false, /* partial_inplace */ |
347 | | 0xffff, /* src_mask */ |
348 | | 0xffff, /* dst_mask */ |
349 | | false), /* pcrel_offset */ |
350 | | |
351 | | HOWTO (R_LM32_GOTOFF_LO16, /* type */ |
352 | | 0, /* rightshift */ |
353 | | 4, /* size */ |
354 | | 16, /* bitsize */ |
355 | | false, /* pc_relative */ |
356 | | 0, /* bitpos */ |
357 | | complain_overflow_dont, /* complain_on_overflow */ |
358 | | bfd_elf_generic_reloc, /* special_function */ |
359 | | "R_LM32_GOTOFF_LO16", /* name */ |
360 | | false, /* partial_inplace */ |
361 | | 0xffff, /* src_mask */ |
362 | | 0xffff, /* dst_mask */ |
363 | | false), /* pcrel_offset */ |
364 | | |
365 | | HOWTO (R_LM32_COPY, /* type */ |
366 | | 0, /* rightshift */ |
367 | | 4, /* size */ |
368 | | 32, /* bitsize */ |
369 | | false, /* pc_relative */ |
370 | | 0, /* bitpos */ |
371 | | complain_overflow_bitfield, /* complain_on_overflow */ |
372 | | bfd_elf_generic_reloc, /* special_function */ |
373 | | "R_LM32_COPY", /* name */ |
374 | | false, /* partial_inplace */ |
375 | | 0xffffffff, /* src_mask */ |
376 | | 0xffffffff, /* dst_mask */ |
377 | | false), /* pcrel_offset */ |
378 | | |
379 | | HOWTO (R_LM32_GLOB_DAT, /* type */ |
380 | | 0, /* rightshift */ |
381 | | 4, /* size */ |
382 | | 32, /* bitsize */ |
383 | | false, /* pc_relative */ |
384 | | 0, /* bitpos */ |
385 | | complain_overflow_bitfield, /* complain_on_overflow */ |
386 | | bfd_elf_generic_reloc, /* special_function */ |
387 | | "R_LM32_GLOB_DAT", /* name */ |
388 | | false, /* partial_inplace */ |
389 | | 0xffffffff, /* src_mask */ |
390 | | 0xffffffff, /* dst_mask */ |
391 | | false), /* pcrel_offset */ |
392 | | |
393 | | HOWTO (R_LM32_JMP_SLOT, /* type */ |
394 | | 0, /* rightshift */ |
395 | | 4, /* size */ |
396 | | 32, /* bitsize */ |
397 | | false, /* pc_relative */ |
398 | | 0, /* bitpos */ |
399 | | complain_overflow_bitfield, /* complain_on_overflow */ |
400 | | bfd_elf_generic_reloc, /* special_function */ |
401 | | "R_LM32_JMP_SLOT", /* name */ |
402 | | false, /* partial_inplace */ |
403 | | 0xffffffff, /* src_mask */ |
404 | | 0xffffffff, /* dst_mask */ |
405 | | false), /* pcrel_offset */ |
406 | | |
407 | | HOWTO (R_LM32_RELATIVE, /* type */ |
408 | | 0, /* rightshift */ |
409 | | 4, /* size */ |
410 | | 32, /* bitsize */ |
411 | | false, /* pc_relative */ |
412 | | 0, /* bitpos */ |
413 | | complain_overflow_bitfield, /* complain_on_overflow */ |
414 | | bfd_elf_generic_reloc, /* special_function */ |
415 | | "R_LM32_RELATIVE", /* name */ |
416 | | false, /* partial_inplace */ |
417 | | 0xffffffff, /* src_mask */ |
418 | | 0xffffffff, /* dst_mask */ |
419 | | false), /* pcrel_offset */ |
420 | | |
421 | | }; |
422 | | |
423 | | /* Map BFD reloc types to lm32 ELF reloc types. */ |
424 | | |
425 | | struct lm32_reloc_map |
426 | | { |
427 | | bfd_reloc_code_real_type bfd_reloc_val; |
428 | | unsigned char elf_reloc_val; |
429 | | }; |
430 | | |
431 | | static const struct lm32_reloc_map lm32_reloc_map[] = |
432 | | { |
433 | | { BFD_RELOC_NONE, R_LM32_NONE }, |
434 | | { BFD_RELOC_8, R_LM32_8 }, |
435 | | { BFD_RELOC_16, R_LM32_16 }, |
436 | | { BFD_RELOC_32, R_LM32_32 }, |
437 | | { BFD_RELOC_HI16, R_LM32_HI16 }, |
438 | | { BFD_RELOC_LO16, R_LM32_LO16 }, |
439 | | { BFD_RELOC_GPREL16, R_LM32_GPREL16 }, |
440 | | { BFD_RELOC_LM32_CALL, R_LM32_CALL }, |
441 | | { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH }, |
442 | | { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT }, |
443 | | { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY }, |
444 | | { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT }, |
445 | | { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 }, |
446 | | { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 }, |
447 | | { BFD_RELOC_LM32_COPY, R_LM32_COPY }, |
448 | | { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT }, |
449 | | { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT }, |
450 | | { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE }, |
451 | | }; |
452 | | |
453 | | static reloc_howto_type * |
454 | | lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
455 | | bfd_reloc_code_real_type code) |
456 | 0 | { |
457 | 0 | unsigned int i; |
458 | |
|
459 | 0 | for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++) |
460 | 0 | if (lm32_reloc_map[i].bfd_reloc_val == code) |
461 | 0 | return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val]; |
462 | 0 | return NULL; |
463 | 0 | } |
464 | | |
465 | | static reloc_howto_type * |
466 | | lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
467 | | const char *r_name) |
468 | 0 | { |
469 | 0 | unsigned int i; |
470 | |
|
471 | 0 | for (i = 0; |
472 | 0 | i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]); |
473 | 0 | i++) |
474 | 0 | if (lm32_elf_howto_table[i].name != NULL |
475 | 0 | && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0) |
476 | 0 | return &lm32_elf_howto_table[i]; |
477 | | |
478 | 0 | return NULL; |
479 | 0 | } |
480 | | |
481 | | |
482 | | /* Set the howto pointer for an Lattice Mico32 ELF reloc. */ |
483 | | |
484 | | static bool |
485 | | lm32_info_to_howto_rela (bfd *abfd, |
486 | | arelent *cache_ptr, |
487 | | Elf_Internal_Rela *dst) |
488 | 0 | { |
489 | 0 | unsigned int r_type; |
490 | |
|
491 | 0 | r_type = ELF32_R_TYPE (dst->r_info); |
492 | 0 | if (r_type >= (unsigned int) R_LM32_max) |
493 | 0 | { |
494 | | /* xgettext:c-format */ |
495 | 0 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
496 | 0 | abfd, r_type); |
497 | 0 | bfd_set_error (bfd_error_bad_value); |
498 | 0 | return false; |
499 | 0 | } |
500 | 0 | cache_ptr->howto = &lm32_elf_howto_table[r_type]; |
501 | 0 | return true; |
502 | 0 | } |
503 | | |
504 | | /* Set the right machine number for an Lattice Mico32 ELF file. */ |
505 | | |
506 | | static bool |
507 | | lm32_elf_object_p (bfd *abfd) |
508 | 489 | { |
509 | 489 | return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32); |
510 | 489 | } |
511 | | |
512 | | /* Set machine type flags just before file is written out. */ |
513 | | |
514 | | static bool |
515 | | lm32_elf_final_write_processing (bfd *abfd) |
516 | 0 | { |
517 | 0 | elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32; |
518 | 0 | elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH; |
519 | 0 | switch (bfd_get_mach (abfd)) |
520 | 0 | { |
521 | 0 | case bfd_mach_lm32: |
522 | 0 | elf_elfheader (abfd)->e_flags |= E_LM32_MACH; |
523 | 0 | break; |
524 | 0 | default: |
525 | 0 | abort (); |
526 | 0 | } |
527 | 0 | return _bfd_elf_final_write_processing (abfd); |
528 | 0 | } |
529 | | |
530 | | /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
531 | | dangerous relocation. */ |
532 | | |
533 | | static bool |
534 | | lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) |
535 | 0 | { |
536 | 0 | unsigned int count; |
537 | 0 | asymbol **sym; |
538 | 0 | unsigned int i; |
539 | | |
540 | | /* If we've already figured out what GP will be, just return it. */ |
541 | 0 | *pgp = _bfd_get_gp_value (output_bfd); |
542 | 0 | if (*pgp) |
543 | 0 | return true; |
544 | | |
545 | 0 | count = bfd_get_symcount (output_bfd); |
546 | 0 | sym = bfd_get_outsymbols (output_bfd); |
547 | | |
548 | | /* The linker script will have created a symbol named `_gp' with the |
549 | | appropriate value. */ |
550 | 0 | if (sym == NULL) |
551 | 0 | i = count; |
552 | 0 | else |
553 | 0 | { |
554 | 0 | for (i = 0; i < count; i++, sym++) |
555 | 0 | { |
556 | 0 | const char *name; |
557 | |
|
558 | 0 | name = bfd_asymbol_name (*sym); |
559 | 0 | if (*name == '_' && strcmp (name, "_gp") == 0) |
560 | 0 | { |
561 | 0 | *pgp = bfd_asymbol_value (*sym); |
562 | 0 | _bfd_set_gp_value (output_bfd, *pgp); |
563 | 0 | break; |
564 | 0 | } |
565 | 0 | } |
566 | 0 | } |
567 | |
|
568 | 0 | if (i >= count) |
569 | 0 | { |
570 | | /* Only get the error once. */ |
571 | 0 | *pgp = 4; |
572 | 0 | _bfd_set_gp_value (output_bfd, *pgp); |
573 | 0 | return false; |
574 | 0 | } |
575 | | |
576 | 0 | return true; |
577 | 0 | } |
578 | | |
579 | | /* We have to figure out the gp value, so that we can adjust the |
580 | | symbol value correctly. We look up the symbol _gp in the output |
581 | | BFD. If we can't find it, we're stuck. We cache it in the ELF |
582 | | target data. We don't need to adjust the symbol value for an |
583 | | external symbol if we are producing relocatable output. */ |
584 | | |
585 | | static bfd_reloc_status_type |
586 | | lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bool relocatable, |
587 | | char **error_message, bfd_vma *pgp) |
588 | 0 | { |
589 | 0 | if (bfd_is_und_section (symbol->section) && !relocatable) |
590 | 0 | { |
591 | 0 | *pgp = 0; |
592 | 0 | return bfd_reloc_undefined; |
593 | 0 | } |
594 | | |
595 | 0 | *pgp = _bfd_get_gp_value (output_bfd); |
596 | 0 | if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) |
597 | 0 | { |
598 | 0 | if (relocatable) |
599 | 0 | { |
600 | | /* Make up a value. */ |
601 | 0 | *pgp = symbol->section->output_section->vma + 0x4000; |
602 | 0 | _bfd_set_gp_value (output_bfd, *pgp); |
603 | 0 | } |
604 | 0 | else if (!lm32_elf_assign_gp (output_bfd, pgp)) |
605 | 0 | { |
606 | 0 | *error_message = |
607 | 0 | (char *) |
608 | 0 | _("global pointer relative relocation when _gp not defined"); |
609 | 0 | return bfd_reloc_dangerous; |
610 | 0 | } |
611 | 0 | } |
612 | | |
613 | 0 | return bfd_reloc_ok; |
614 | 0 | } |
615 | | |
616 | | static bfd_reloc_status_type |
617 | | lm32_elf_do_gprel_relocate (bfd *abfd, |
618 | | reloc_howto_type *howto, |
619 | | asection *input_section ATTRIBUTE_UNUSED, |
620 | | bfd_byte *data, |
621 | | bfd_vma offset, |
622 | | bfd_vma symbol_value, |
623 | | bfd_vma addend) |
624 | 0 | { |
625 | 0 | return _bfd_final_link_relocate (howto, abfd, input_section, |
626 | 0 | data, offset, symbol_value, addend); |
627 | 0 | } |
628 | | |
629 | | static bfd_reloc_status_type |
630 | | lm32_elf_gprel_reloc (bfd *abfd, |
631 | | arelent *reloc_entry, |
632 | | asymbol *symbol, |
633 | | void *data, |
634 | | asection *input_section, |
635 | | bfd *output_bfd, |
636 | | char **msg) |
637 | 0 | { |
638 | 0 | bfd_vma relocation; |
639 | 0 | bfd_vma gp; |
640 | 0 | bfd_reloc_status_type r; |
641 | |
|
642 | 0 | if (output_bfd != (bfd *) NULL |
643 | 0 | && (symbol->flags & BSF_SECTION_SYM) == 0 |
644 | 0 | && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
645 | 0 | { |
646 | 0 | reloc_entry->address += input_section->output_offset; |
647 | 0 | return bfd_reloc_ok; |
648 | 0 | } |
649 | | |
650 | 0 | if (output_bfd != NULL) |
651 | 0 | return bfd_reloc_ok; |
652 | | |
653 | 0 | relocation = symbol->value |
654 | 0 | + symbol->section->output_section->vma + symbol->section->output_offset; |
655 | |
|
656 | 0 | if ((r = |
657 | 0 | lm32_elf_final_gp (abfd, symbol, false, msg, &gp)) == bfd_reloc_ok) |
658 | 0 | { |
659 | 0 | relocation = relocation + reloc_entry->addend - gp; |
660 | 0 | reloc_entry->addend = 0; |
661 | 0 | if ((signed) relocation < -32768 || (signed) relocation > 32767) |
662 | 0 | { |
663 | 0 | *msg = _("global pointer relative address out of range"); |
664 | 0 | r = bfd_reloc_outofrange; |
665 | 0 | } |
666 | 0 | else |
667 | 0 | { |
668 | 0 | r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto, |
669 | 0 | input_section, |
670 | 0 | data, reloc_entry->address, |
671 | 0 | relocation, reloc_entry->addend); |
672 | 0 | } |
673 | 0 | } |
674 | |
|
675 | 0 | return r; |
676 | 0 | } |
677 | | |
678 | | /* Find the segment number in which OSEC, and output section, is |
679 | | located. */ |
680 | | |
681 | | static unsigned |
682 | | _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec) |
683 | 0 | { |
684 | 0 | struct elf_segment_map *m; |
685 | 0 | Elf_Internal_Phdr *p; |
686 | | |
687 | | /* Find the segment that contains the output_section. */ |
688 | 0 | for (m = elf_seg_map (output_bfd), p = elf_tdata (output_bfd)->phdr; |
689 | 0 | m != NULL; |
690 | 0 | m = m->next, p++) |
691 | 0 | { |
692 | 0 | int i; |
693 | |
|
694 | 0 | for (i = m->count - 1; i >= 0; i--) |
695 | 0 | if (m->sections[i] == osec) |
696 | 0 | break; |
697 | |
|
698 | 0 | if (i >= 0) |
699 | 0 | break; |
700 | 0 | } |
701 | |
|
702 | 0 | return p - elf_tdata (output_bfd)->phdr; |
703 | 0 | } |
704 | | |
705 | | /* Determine if an output section is read-only. */ |
706 | | |
707 | | inline static bool |
708 | | _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec) |
709 | 0 | { |
710 | 0 | unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec); |
711 | |
|
712 | 0 | return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); |
713 | 0 | } |
714 | | |
715 | | /* Relocate a section */ |
716 | | |
717 | | static int |
718 | | lm32_elf_relocate_section (bfd *output_bfd, |
719 | | struct bfd_link_info *info, |
720 | | bfd *input_bfd, |
721 | | asection *input_section, |
722 | | bfd_byte *contents, |
723 | | Elf_Internal_Rela *relocs, |
724 | | Elf_Internal_Sym *local_syms, |
725 | | asection **local_sections) |
726 | 0 | { |
727 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
728 | 0 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
729 | 0 | Elf_Internal_Rela *rel, *relend; |
730 | 0 | struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info); |
731 | 0 | bfd_vma *local_got_offsets; |
732 | 0 | asection *sgot; |
733 | |
|
734 | 0 | if (htab == NULL) |
735 | 0 | return false; |
736 | | |
737 | 0 | local_got_offsets = elf_local_got_offsets (input_bfd); |
738 | |
|
739 | 0 | sgot = htab->root.sgot; |
740 | |
|
741 | 0 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
742 | 0 | sym_hashes = elf_sym_hashes (input_bfd); |
743 | |
|
744 | 0 | rel = relocs; |
745 | 0 | relend = relocs + input_section->reloc_count; |
746 | 0 | for (; rel < relend; rel++) |
747 | 0 | { |
748 | 0 | reloc_howto_type *howto; |
749 | 0 | unsigned int r_type; |
750 | 0 | unsigned long r_symndx; |
751 | 0 | Elf_Internal_Sym *sym; |
752 | 0 | asection *sec; |
753 | 0 | struct elf_link_hash_entry *h; |
754 | 0 | bfd_vma relocation; |
755 | 0 | bfd_vma gp; |
756 | 0 | bfd_reloc_status_type r; |
757 | 0 | const char *name = NULL; |
758 | |
|
759 | 0 | r_symndx = ELF32_R_SYM (rel->r_info); |
760 | 0 | r_type = ELF32_R_TYPE (rel->r_info); |
761 | |
|
762 | 0 | if (r_type == R_LM32_GNU_VTENTRY |
763 | 0 | || r_type == R_LM32_GNU_VTINHERIT ) |
764 | 0 | continue; |
765 | | |
766 | 0 | h = NULL; |
767 | 0 | sym = NULL; |
768 | 0 | sec = NULL; |
769 | |
|
770 | 0 | howto = lm32_elf_howto_table + r_type; |
771 | |
|
772 | 0 | if (r_symndx < symtab_hdr->sh_info) |
773 | 0 | { |
774 | | /* It's a local symbol. */ |
775 | 0 | sym = local_syms + r_symndx; |
776 | 0 | sec = local_sections[r_symndx]; |
777 | 0 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
778 | 0 | name = bfd_elf_string_from_elf_section |
779 | 0 | (input_bfd, symtab_hdr->sh_link, sym->st_name); |
780 | 0 | name = name == NULL ? bfd_section_name (sec) : name; |
781 | 0 | } |
782 | 0 | else |
783 | 0 | { |
784 | | /* It's a global symbol. */ |
785 | 0 | bool unresolved_reloc; |
786 | 0 | bool warned, ignored; |
787 | |
|
788 | 0 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
789 | 0 | r_symndx, symtab_hdr, sym_hashes, |
790 | 0 | h, sec, relocation, |
791 | 0 | unresolved_reloc, warned, ignored); |
792 | 0 | name = h->root.root.string; |
793 | 0 | } |
794 | | |
795 | 0 | if (sec != NULL && discarded_section (sec)) |
796 | 0 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
797 | 0 | rel, 1, relend, howto, 0, contents); |
798 | |
|
799 | 0 | if (bfd_link_relocatable (info)) |
800 | 0 | { |
801 | | /* This is a relocatable link. We don't have to change |
802 | | anything, unless the reloc is against a section symbol, |
803 | | in which case we have to adjust according to where the |
804 | | section symbol winds up in the output section. */ |
805 | 0 | if (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
806 | 0 | continue; |
807 | | |
808 | | /* If partial_inplace, we need to store any additional addend |
809 | | back in the section. */ |
810 | 0 | if (! howto->partial_inplace) |
811 | 0 | continue; |
812 | | |
813 | | /* Shouldn't reach here. */ |
814 | 0 | abort (); |
815 | 0 | r = bfd_reloc_ok; |
816 | 0 | } |
817 | 0 | else |
818 | 0 | { |
819 | 0 | switch (howto->type) |
820 | 0 | { |
821 | 0 | case R_LM32_GPREL16: |
822 | 0 | if (!lm32_elf_assign_gp (output_bfd, &gp)) |
823 | 0 | r = bfd_reloc_dangerous; |
824 | 0 | else |
825 | 0 | { |
826 | 0 | relocation = relocation + rel->r_addend - gp; |
827 | 0 | rel->r_addend = 0; |
828 | 0 | if ((signed)relocation < -32768 || (signed)relocation > 32767) |
829 | 0 | r = bfd_reloc_outofrange; |
830 | 0 | else |
831 | 0 | { |
832 | 0 | r = _bfd_final_link_relocate (howto, input_bfd, |
833 | 0 | input_section, contents, |
834 | 0 | rel->r_offset, relocation, |
835 | 0 | rel->r_addend); |
836 | 0 | } |
837 | 0 | } |
838 | 0 | break; |
839 | 0 | case R_LM32_16_GOT: |
840 | | /* Relocation is to the entry for this symbol in the global |
841 | | offset table. */ |
842 | 0 | BFD_ASSERT (sgot != NULL); |
843 | 0 | if (h != NULL) |
844 | 0 | { |
845 | 0 | bool dyn; |
846 | 0 | bfd_vma off; |
847 | |
|
848 | 0 | off = h->got.offset; |
849 | 0 | BFD_ASSERT (off != (bfd_vma) -1); |
850 | |
|
851 | 0 | dyn = htab->root.dynamic_sections_created; |
852 | 0 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
853 | 0 | bfd_link_pic (info), |
854 | 0 | h) |
855 | 0 | || (bfd_link_pic (info) |
856 | 0 | && (info->symbolic |
857 | 0 | || h->dynindx == -1 |
858 | 0 | || h->forced_local) |
859 | 0 | && h->def_regular)) |
860 | 0 | { |
861 | | /* This is actually a static link, or it is a |
862 | | -Bsymbolic link and the symbol is defined |
863 | | locally, or the symbol was forced to be local |
864 | | because of a version file. We must initialize |
865 | | this entry in the global offset table. Since the |
866 | | offset must always be a multiple of 4, we use the |
867 | | least significant bit to record whether we have |
868 | | initialized it already. |
869 | | |
870 | | When doing a dynamic link, we create a .rela.got |
871 | | relocation entry to initialize the value. This |
872 | | is done in the finish_dynamic_symbol routine. */ |
873 | 0 | if ((off & 1) != 0) |
874 | 0 | off &= ~1; |
875 | 0 | else |
876 | 0 | { |
877 | | /* Write entry in GOT */ |
878 | 0 | bfd_put_32 (output_bfd, relocation, |
879 | 0 | sgot->contents + off); |
880 | | /* Create entry in .rofixup pointing to GOT entry. */ |
881 | 0 | if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) |
882 | 0 | { |
883 | 0 | _lm32fdpic_add_rofixup (output_bfd, |
884 | 0 | lm32fdpic_fixup32_section |
885 | 0 | (info), |
886 | 0 | sgot->output_section->vma |
887 | 0 | + sgot->output_offset |
888 | 0 | + off); |
889 | 0 | } |
890 | | /* Mark GOT entry as having been written. */ |
891 | 0 | h->got.offset |= 1; |
892 | 0 | } |
893 | 0 | } |
894 | |
|
895 | 0 | relocation = sgot->output_offset + off; |
896 | 0 | } |
897 | 0 | else |
898 | 0 | { |
899 | 0 | bfd_vma off; |
900 | 0 | bfd_byte *loc; |
901 | |
|
902 | 0 | BFD_ASSERT (local_got_offsets != NULL |
903 | 0 | && local_got_offsets[r_symndx] != (bfd_vma) -1); |
904 | | |
905 | | /* Get offset into GOT table. */ |
906 | 0 | off = local_got_offsets[r_symndx]; |
907 | | |
908 | | /* The offset must always be a multiple of 4. We use |
909 | | the least significant bit to record whether we have |
910 | | already processed this entry. */ |
911 | 0 | if ((off & 1) != 0) |
912 | 0 | off &= ~1; |
913 | 0 | else |
914 | 0 | { |
915 | | /* Write entry in GOT. */ |
916 | 0 | bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
917 | | /* Create entry in .rofixup pointing to GOT entry. */ |
918 | 0 | if (IS_FDPIC (output_bfd)) |
919 | 0 | { |
920 | 0 | _lm32fdpic_add_rofixup (output_bfd, |
921 | 0 | lm32fdpic_fixup32_section |
922 | 0 | (info), |
923 | 0 | sgot->output_section->vma |
924 | 0 | + sgot->output_offset |
925 | 0 | + off); |
926 | 0 | } |
927 | |
|
928 | 0 | if (bfd_link_pic (info)) |
929 | 0 | { |
930 | 0 | asection *srelgot; |
931 | 0 | Elf_Internal_Rela outrel; |
932 | | |
933 | | /* We need to generate a R_LM32_RELATIVE reloc |
934 | | for the dynamic linker. */ |
935 | 0 | srelgot = htab->root.srelgot; |
936 | 0 | BFD_ASSERT (srelgot != NULL); |
937 | |
|
938 | 0 | outrel.r_offset = (sgot->output_section->vma |
939 | 0 | + sgot->output_offset |
940 | 0 | + off); |
941 | 0 | outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
942 | 0 | outrel.r_addend = relocation; |
943 | 0 | loc = srelgot->contents; |
944 | 0 | loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); |
945 | 0 | bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); |
946 | 0 | ++srelgot->reloc_count; |
947 | 0 | } |
948 | |
|
949 | 0 | local_got_offsets[r_symndx] |= 1; |
950 | 0 | } |
951 | | |
952 | |
|
953 | 0 | relocation = sgot->output_offset + off; |
954 | 0 | } |
955 | | |
956 | | /* Addend should be zero. */ |
957 | 0 | if (rel->r_addend != 0) |
958 | 0 | _bfd_error_handler |
959 | 0 | (_("internal error: addend should be zero for %s"), |
960 | 0 | "R_LM32_16_GOT"); |
961 | |
|
962 | 0 | r = _bfd_final_link_relocate (howto, |
963 | 0 | input_bfd, |
964 | 0 | input_section, |
965 | 0 | contents, |
966 | 0 | rel->r_offset, |
967 | 0 | relocation, |
968 | 0 | rel->r_addend); |
969 | 0 | break; |
970 | | |
971 | 0 | case R_LM32_GOTOFF_LO16: |
972 | 0 | case R_LM32_GOTOFF_HI16: |
973 | | /* Relocation is offset from GOT. */ |
974 | 0 | BFD_ASSERT (sgot != NULL); |
975 | 0 | relocation -= sgot->output_section->vma; |
976 | | /* Account for sign-extension. */ |
977 | 0 | if ((r_type == R_LM32_GOTOFF_HI16) |
978 | 0 | && ((relocation + rel->r_addend) & 0x8000)) |
979 | 0 | rel->r_addend += 0x10000; |
980 | 0 | r = _bfd_final_link_relocate (howto, |
981 | 0 | input_bfd, |
982 | 0 | input_section, |
983 | 0 | contents, |
984 | 0 | rel->r_offset, |
985 | 0 | relocation, |
986 | 0 | rel->r_addend); |
987 | 0 | break; |
988 | | |
989 | 0 | case R_LM32_32: |
990 | 0 | if (IS_FDPIC (output_bfd)) |
991 | 0 | { |
992 | 0 | if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) |
993 | 0 | { |
994 | | /* Only create .rofixup entries for relocs in loadable sections. */ |
995 | 0 | if ((bfd_section_flags (input_section->output_section) |
996 | 0 | & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
997 | | |
998 | 0 | { |
999 | | /* Check address to be modified is writable. */ |
1000 | 0 | if (_lm32fdpic_osec_readonly_p (output_bfd, |
1001 | 0 | input_section |
1002 | 0 | ->output_section)) |
1003 | 0 | { |
1004 | 0 | info->callbacks->warning |
1005 | 0 | (info, |
1006 | 0 | _("cannot emit dynamic relocations in read-only section"), |
1007 | 0 | name, input_bfd, input_section, rel->r_offset); |
1008 | 0 | return false; |
1009 | 0 | } |
1010 | | /* Create entry in .rofixup section. */ |
1011 | 0 | _lm32fdpic_add_rofixup (output_bfd, |
1012 | 0 | lm32fdpic_fixup32_section (info), |
1013 | 0 | input_section->output_section->vma |
1014 | 0 | + input_section->output_offset |
1015 | 0 | + rel->r_offset); |
1016 | 0 | } |
1017 | 0 | } |
1018 | 0 | } |
1019 | | /* Fall through. */ |
1020 | | |
1021 | 0 | default: |
1022 | 0 | r = _bfd_final_link_relocate (howto, |
1023 | 0 | input_bfd, |
1024 | 0 | input_section, |
1025 | 0 | contents, |
1026 | 0 | rel->r_offset, |
1027 | 0 | relocation, |
1028 | 0 | rel->r_addend); |
1029 | 0 | break; |
1030 | 0 | } |
1031 | 0 | } |
1032 | | |
1033 | 0 | if (r != bfd_reloc_ok) |
1034 | 0 | { |
1035 | 0 | const char *msg = NULL; |
1036 | 0 | arelent bfd_reloc; |
1037 | |
|
1038 | 0 | if (! lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel)) |
1039 | 0 | continue; |
1040 | 0 | howto = bfd_reloc.howto; |
1041 | |
|
1042 | 0 | if (h != NULL) |
1043 | 0 | name = h->root.root.string; |
1044 | 0 | else |
1045 | 0 | { |
1046 | 0 | name = (bfd_elf_string_from_elf_section |
1047 | 0 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); |
1048 | 0 | if (name == NULL || *name == '\0') |
1049 | 0 | name = bfd_section_name (sec); |
1050 | 0 | } |
1051 | |
|
1052 | 0 | switch (r) |
1053 | 0 | { |
1054 | 0 | case bfd_reloc_overflow: |
1055 | 0 | if ((h != NULL) |
1056 | 0 | && (h->root.type == bfd_link_hash_undefweak)) |
1057 | 0 | break; |
1058 | 0 | (*info->callbacks->reloc_overflow) |
1059 | 0 | (info, (h ? &h->root : NULL), name, howto->name, |
1060 | 0 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
1061 | 0 | break; |
1062 | | |
1063 | 0 | case bfd_reloc_undefined: |
1064 | 0 | (*info->callbacks->undefined_symbol) |
1065 | 0 | (info, name, input_bfd, input_section, rel->r_offset, true); |
1066 | 0 | break; |
1067 | | |
1068 | 0 | case bfd_reloc_outofrange: |
1069 | 0 | msg = _("internal error: out of range error"); |
1070 | 0 | goto common_error; |
1071 | | |
1072 | 0 | case bfd_reloc_notsupported: |
1073 | 0 | msg = _("internal error: unsupported relocation error"); |
1074 | 0 | goto common_error; |
1075 | | |
1076 | 0 | case bfd_reloc_dangerous: |
1077 | 0 | msg = _("internal error: dangerous error"); |
1078 | 0 | goto common_error; |
1079 | | |
1080 | 0 | default: |
1081 | 0 | msg = _("internal error: unknown error"); |
1082 | | /* fall through */ |
1083 | |
|
1084 | 0 | common_error: |
1085 | 0 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
1086 | 0 | input_section, rel->r_offset); |
1087 | 0 | break; |
1088 | 0 | } |
1089 | 0 | } |
1090 | 0 | } |
1091 | | |
1092 | 0 | return true; |
1093 | 0 | } |
1094 | | |
1095 | | static asection * |
1096 | | lm32_elf_gc_mark_hook (asection *sec, |
1097 | | struct bfd_link_info *info, |
1098 | | Elf_Internal_Rela *rel, |
1099 | | struct elf_link_hash_entry *h, |
1100 | | Elf_Internal_Sym *sym) |
1101 | 0 | { |
1102 | 0 | if (h != NULL) |
1103 | 0 | switch (ELF32_R_TYPE (rel->r_info)) |
1104 | 0 | { |
1105 | 0 | case R_LM32_GNU_VTINHERIT: |
1106 | 0 | case R_LM32_GNU_VTENTRY: |
1107 | 0 | return NULL; |
1108 | 0 | } |
1109 | | |
1110 | 0 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
1111 | 0 | } |
1112 | | |
1113 | | /* Look through the relocs for a section during the first phase. */ |
1114 | | |
1115 | | static bool |
1116 | | lm32_elf_check_relocs (bfd *abfd, |
1117 | | struct bfd_link_info *info, |
1118 | | asection *sec, |
1119 | | const Elf_Internal_Rela *relocs) |
1120 | 0 | { |
1121 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1122 | 0 | struct elf_link_hash_entry **sym_hashes; |
1123 | 0 | const Elf_Internal_Rela *rel; |
1124 | 0 | const Elf_Internal_Rela *rel_end; |
1125 | 0 | struct elf_lm32_link_hash_table *htab; |
1126 | 0 | bfd *dynobj; |
1127 | |
|
1128 | 0 | if (bfd_link_relocatable (info)) |
1129 | 0 | return true; |
1130 | | |
1131 | 0 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1132 | 0 | sym_hashes = elf_sym_hashes (abfd); |
1133 | |
|
1134 | 0 | htab = lm32_elf_hash_table (info); |
1135 | 0 | if (htab == NULL) |
1136 | 0 | return false; |
1137 | | |
1138 | 0 | dynobj = htab->root.dynobj; |
1139 | |
|
1140 | 0 | rel_end = relocs + sec->reloc_count; |
1141 | 0 | for (rel = relocs; rel < rel_end; rel++) |
1142 | 0 | { |
1143 | 0 | int r_type; |
1144 | 0 | struct elf_link_hash_entry *h; |
1145 | 0 | unsigned long r_symndx; |
1146 | |
|
1147 | 0 | r_symndx = ELF32_R_SYM (rel->r_info); |
1148 | 0 | r_type = ELF32_R_TYPE (rel->r_info); |
1149 | 0 | if (r_symndx < symtab_hdr->sh_info) |
1150 | 0 | h = NULL; |
1151 | 0 | else |
1152 | 0 | { |
1153 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1154 | 0 | while (h->root.type == bfd_link_hash_indirect |
1155 | 0 | || h->root.type == bfd_link_hash_warning) |
1156 | 0 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1157 | 0 | } |
1158 | | |
1159 | | /* Some relocs require a global offset table. */ |
1160 | 0 | if (htab->root.sgot == NULL) |
1161 | 0 | { |
1162 | 0 | switch (r_type) |
1163 | 0 | { |
1164 | 0 | case R_LM32_16_GOT: |
1165 | 0 | case R_LM32_GOTOFF_HI16: |
1166 | 0 | case R_LM32_GOTOFF_LO16: |
1167 | 0 | if (dynobj == NULL) |
1168 | 0 | htab->root.dynobj = dynobj = abfd; |
1169 | 0 | if (!_bfd_elf_create_got_section (dynobj, info)) |
1170 | 0 | return false; |
1171 | 0 | break; |
1172 | 0 | } |
1173 | 0 | } |
1174 | | |
1175 | | /* Some relocs require a rofixup table. */ |
1176 | 0 | if (IS_FDPIC (abfd)) |
1177 | 0 | { |
1178 | 0 | switch (r_type) |
1179 | 0 | { |
1180 | 0 | case R_LM32_32: |
1181 | | /* FDPIC requires a GOT if there is a .rofixup section |
1182 | | (Normal ELF doesn't). */ |
1183 | 0 | if (dynobj == NULL) |
1184 | 0 | htab->root.dynobj = dynobj = abfd; |
1185 | 0 | if (!_bfd_elf_create_got_section (dynobj, info)) |
1186 | 0 | return false; |
1187 | | /* Create .rofixup section */ |
1188 | 0 | if (htab->sfixup32 == NULL) |
1189 | 0 | { |
1190 | 0 | if (! create_rofixup_section (dynobj, info)) |
1191 | 0 | return false; |
1192 | 0 | } |
1193 | 0 | break; |
1194 | 0 | case R_LM32_16_GOT: |
1195 | 0 | case R_LM32_GOTOFF_HI16: |
1196 | 0 | case R_LM32_GOTOFF_LO16: |
1197 | | /* Create .rofixup section. */ |
1198 | 0 | if (htab->sfixup32 == NULL) |
1199 | 0 | { |
1200 | 0 | if (dynobj == NULL) |
1201 | 0 | htab->root.dynobj = dynobj = abfd; |
1202 | 0 | if (! create_rofixup_section (dynobj, info)) |
1203 | 0 | return false; |
1204 | 0 | } |
1205 | 0 | break; |
1206 | 0 | } |
1207 | 0 | } |
1208 | | |
1209 | 0 | switch (r_type) |
1210 | 0 | { |
1211 | 0 | case R_LM32_16_GOT: |
1212 | 0 | if (h != NULL) |
1213 | 0 | h->got.refcount += 1; |
1214 | 0 | else |
1215 | 0 | { |
1216 | 0 | bfd_signed_vma *local_got_refcounts; |
1217 | | |
1218 | | /* This is a global offset table entry for a local symbol. */ |
1219 | 0 | local_got_refcounts = elf_local_got_refcounts (abfd); |
1220 | 0 | if (local_got_refcounts == NULL) |
1221 | 0 | { |
1222 | 0 | bfd_size_type size; |
1223 | |
|
1224 | 0 | size = symtab_hdr->sh_info; |
1225 | 0 | size *= sizeof (bfd_signed_vma); |
1226 | 0 | local_got_refcounts = bfd_zalloc (abfd, size); |
1227 | 0 | if (local_got_refcounts == NULL) |
1228 | 0 | return false; |
1229 | 0 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
1230 | 0 | } |
1231 | 0 | local_got_refcounts[r_symndx] += 1; |
1232 | 0 | } |
1233 | 0 | break; |
1234 | | |
1235 | | /* This relocation describes the C++ object vtable hierarchy. |
1236 | | Reconstruct it for later use during GC. */ |
1237 | 0 | case R_LM32_GNU_VTINHERIT: |
1238 | 0 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
1239 | 0 | return false; |
1240 | 0 | break; |
1241 | | |
1242 | | /* This relocation describes which C++ vtable entries are actually |
1243 | | used. Record for later use during GC. */ |
1244 | 0 | case R_LM32_GNU_VTENTRY: |
1245 | 0 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
1246 | 0 | return false; |
1247 | 0 | break; |
1248 | |
|
1249 | 0 | } |
1250 | 0 | } |
1251 | | |
1252 | 0 | return true; |
1253 | 0 | } |
1254 | | |
1255 | | /* Finish up the dynamic sections. */ |
1256 | | |
1257 | | static bool |
1258 | | lm32_elf_finish_dynamic_sections (bfd *output_bfd, |
1259 | | struct bfd_link_info *info) |
1260 | 0 | { |
1261 | 0 | struct elf_lm32_link_hash_table *htab; |
1262 | 0 | bfd *dynobj; |
1263 | 0 | asection *sdyn; |
1264 | 0 | asection *sgot; |
1265 | |
|
1266 | 0 | htab = lm32_elf_hash_table (info); |
1267 | 0 | if (htab == NULL) |
1268 | 0 | return false; |
1269 | | |
1270 | 0 | dynobj = htab->root.dynobj; |
1271 | |
|
1272 | 0 | sgot = htab->root.sgotplt; |
1273 | 0 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
1274 | |
|
1275 | 0 | if (htab->root.dynamic_sections_created) |
1276 | 0 | { |
1277 | 0 | asection *splt; |
1278 | 0 | Elf32_External_Dyn *dyncon, *dynconend; |
1279 | |
|
1280 | 0 | BFD_ASSERT (sgot != NULL && sdyn != NULL); |
1281 | |
|
1282 | 0 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
1283 | 0 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
1284 | |
|
1285 | 0 | for (; dyncon < dynconend; dyncon++) |
1286 | 0 | { |
1287 | 0 | Elf_Internal_Dyn dyn; |
1288 | 0 | asection *s; |
1289 | |
|
1290 | 0 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
1291 | |
|
1292 | 0 | switch (dyn.d_tag) |
1293 | 0 | { |
1294 | 0 | default: |
1295 | 0 | break; |
1296 | | |
1297 | 0 | case DT_PLTGOT: |
1298 | 0 | s = htab->root.sgotplt; |
1299 | 0 | goto get_vma; |
1300 | 0 | case DT_JMPREL: |
1301 | 0 | s = htab->root.srelplt; |
1302 | 0 | get_vma: |
1303 | 0 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
1304 | 0 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
1305 | 0 | break; |
1306 | | |
1307 | 0 | case DT_PLTRELSZ: |
1308 | 0 | s = htab->root.srelplt; |
1309 | 0 | dyn.d_un.d_val = s->size; |
1310 | 0 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
1311 | 0 | break; |
1312 | 0 | } |
1313 | 0 | } |
1314 | | |
1315 | | /* Fill in the first entry in the procedure linkage table. */ |
1316 | 0 | splt = htab->root.splt; |
1317 | 0 | if (splt && splt->size > 0) |
1318 | 0 | { |
1319 | 0 | if (bfd_link_pic (info)) |
1320 | 0 | { |
1321 | 0 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); |
1322 | 0 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); |
1323 | 0 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); |
1324 | 0 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); |
1325 | 0 | bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); |
1326 | 0 | } |
1327 | 0 | else |
1328 | 0 | { |
1329 | 0 | unsigned long addr; |
1330 | | /* addr = .got + 4 */ |
1331 | 0 | addr = sgot->output_section->vma + sgot->output_offset + 4; |
1332 | 0 | bfd_put_32 (output_bfd, |
1333 | 0 | PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), |
1334 | 0 | splt->contents); |
1335 | 0 | bfd_put_32 (output_bfd, |
1336 | 0 | PLT0_ENTRY_WORD1 | (addr & 0xffff), |
1337 | 0 | splt->contents + 4); |
1338 | 0 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); |
1339 | 0 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); |
1340 | 0 | bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); |
1341 | 0 | } |
1342 | |
|
1343 | 0 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
1344 | 0 | PLT_ENTRY_SIZE; |
1345 | 0 | } |
1346 | 0 | } |
1347 | | |
1348 | | /* Fill in the first three entries in the global offset table. */ |
1349 | 0 | if (sgot && sgot->size > 0) |
1350 | 0 | { |
1351 | 0 | if (sdyn == NULL) |
1352 | 0 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
1353 | 0 | else |
1354 | 0 | bfd_put_32 (output_bfd, |
1355 | 0 | sdyn->output_section->vma + sdyn->output_offset, |
1356 | 0 | sgot->contents); |
1357 | 0 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
1358 | 0 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
1359 | | |
1360 | | /* FIXME: This can be null if create_dynamic_sections wasn't called. */ |
1361 | 0 | if (elf_section_data (sgot->output_section) != NULL) |
1362 | 0 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
1363 | 0 | } |
1364 | |
|
1365 | 0 | if (lm32fdpic_fixup32_section (info)) |
1366 | 0 | { |
1367 | 0 | struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; |
1368 | 0 | bfd_vma got_value = hgot->root.u.def.value |
1369 | 0 | + hgot->root.u.def.section->output_section->vma |
1370 | 0 | + hgot->root.u.def.section->output_offset; |
1371 | 0 | struct bfd_link_hash_entry *hend; |
1372 | | |
1373 | | /* Last entry is pointer to GOT. */ |
1374 | 0 | _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); |
1375 | | |
1376 | | /* Check we wrote enough entries. */ |
1377 | 0 | if (lm32fdpic_fixup32_section (info)->size |
1378 | 0 | != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) |
1379 | 0 | { |
1380 | 0 | _bfd_error_handler |
1381 | 0 | ("LINKER BUG: .rofixup section size mismatch: size/4 %" PRId64 |
1382 | 0 | " != relocs %d", |
1383 | 0 | (int64_t) (lm32fdpic_fixup32_section (info)->size / 4), |
1384 | 0 | lm32fdpic_fixup32_section (info)->reloc_count); |
1385 | 0 | return false; |
1386 | 0 | } |
1387 | | |
1388 | 0 | hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", |
1389 | 0 | false, false, true); |
1390 | 0 | if (hend |
1391 | 0 | && (hend->type == bfd_link_hash_defined |
1392 | 0 | || hend->type == bfd_link_hash_defweak) |
1393 | 0 | && hend->u.def.section->output_section != NULL) |
1394 | 0 | { |
1395 | 0 | bfd_vma value = |
1396 | 0 | lm32fdpic_fixup32_section (info)->output_section->vma |
1397 | 0 | + lm32fdpic_fixup32_section (info)->output_offset |
1398 | 0 | + lm32fdpic_fixup32_section (info)->size |
1399 | 0 | - hend->u.def.section->output_section->vma |
1400 | 0 | - hend->u.def.section->output_offset; |
1401 | 0 | BFD_ASSERT (hend->u.def.value == value); |
1402 | 0 | if (hend->u.def.value != value) |
1403 | 0 | { |
1404 | 0 | _bfd_error_handler |
1405 | 0 | ("LINKER BUG: .rofixup section hend->u.def.value != value: %" |
1406 | 0 | PRId64 " != %" PRId64, |
1407 | 0 | (int64_t) hend->u.def.value, (int64_t) value); |
1408 | 0 | return false; |
1409 | 0 | } |
1410 | 0 | } |
1411 | 0 | } |
1412 | | |
1413 | 0 | return true; |
1414 | 0 | } |
1415 | | |
1416 | | /* Finish up dynamic symbol handling. We set the contents of various |
1417 | | dynamic sections here. */ |
1418 | | |
1419 | | static bool |
1420 | | lm32_elf_finish_dynamic_symbol (bfd *output_bfd, |
1421 | | struct bfd_link_info *info, |
1422 | | struct elf_link_hash_entry *h, |
1423 | | Elf_Internal_Sym *sym) |
1424 | 0 | { |
1425 | 0 | struct elf_lm32_link_hash_table *htab; |
1426 | 0 | bfd_byte *loc; |
1427 | |
|
1428 | 0 | htab = lm32_elf_hash_table (info); |
1429 | |
|
1430 | 0 | if (h->plt.offset != (bfd_vma) -1) |
1431 | 0 | { |
1432 | 0 | asection *splt; |
1433 | 0 | asection *sgot; |
1434 | 0 | asection *srela; |
1435 | |
|
1436 | 0 | bfd_vma plt_index; |
1437 | 0 | bfd_vma got_offset; |
1438 | 0 | Elf_Internal_Rela rela; |
1439 | | |
1440 | | /* This symbol has an entry in the procedure linkage table. Set |
1441 | | it up. */ |
1442 | 0 | BFD_ASSERT (h->dynindx != -1); |
1443 | |
|
1444 | 0 | splt = htab->root.splt; |
1445 | 0 | sgot = htab->root.sgotplt; |
1446 | 0 | srela = htab->root.srelplt; |
1447 | 0 | BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
1448 | | |
1449 | | /* Get the index in the procedure linkage table which |
1450 | | corresponds to this symbol. This is the index of this symbol |
1451 | | in all the symbols for which we are making plt entries. The |
1452 | | first entry in the procedure linkage table is reserved. */ |
1453 | 0 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
1454 | | |
1455 | | /* Get the offset into the .got table of the entry that |
1456 | | corresponds to this function. Each .got entry is 4 bytes. |
1457 | | The first three are reserved. */ |
1458 | 0 | got_offset = (plt_index + 3) * 4; |
1459 | | |
1460 | | /* Fill in the entry in the procedure linkage table. */ |
1461 | 0 | if (! bfd_link_pic (info)) |
1462 | 0 | { |
1463 | | /* TODO */ |
1464 | 0 | } |
1465 | 0 | else |
1466 | 0 | { |
1467 | | /* TODO */ |
1468 | 0 | } |
1469 | | |
1470 | | /* Fill in the entry in the global offset table. */ |
1471 | 0 | bfd_put_32 (output_bfd, |
1472 | 0 | (splt->output_section->vma |
1473 | 0 | + splt->output_offset |
1474 | 0 | + h->plt.offset |
1475 | 0 | + 12), /* same offset */ |
1476 | 0 | sgot->contents + got_offset); |
1477 | | |
1478 | | /* Fill in the entry in the .rela.plt section. */ |
1479 | 0 | rela.r_offset = (sgot->output_section->vma |
1480 | 0 | + sgot->output_offset |
1481 | 0 | + got_offset); |
1482 | 0 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); |
1483 | 0 | rela.r_addend = 0; |
1484 | 0 | loc = srela->contents; |
1485 | 0 | loc += plt_index * sizeof (Elf32_External_Rela); |
1486 | 0 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
1487 | |
|
1488 | 0 | if (!h->def_regular) |
1489 | 0 | { |
1490 | | /* Mark the symbol as undefined, rather than as defined in |
1491 | | the .plt section. Leave the value alone. */ |
1492 | 0 | sym->st_shndx = SHN_UNDEF; |
1493 | 0 | } |
1494 | |
|
1495 | 0 | } |
1496 | |
|
1497 | 0 | if (h->got.offset != (bfd_vma) -1) |
1498 | 0 | { |
1499 | 0 | asection *sgot; |
1500 | 0 | asection *srela; |
1501 | 0 | Elf_Internal_Rela rela; |
1502 | | |
1503 | | /* This symbol has an entry in the global offset table. Set it |
1504 | | up. */ |
1505 | 0 | sgot = htab->root.sgot; |
1506 | 0 | srela = htab->root.srelgot; |
1507 | 0 | BFD_ASSERT (sgot != NULL && srela != NULL); |
1508 | |
|
1509 | 0 | rela.r_offset = (sgot->output_section->vma |
1510 | 0 | + sgot->output_offset |
1511 | 0 | + (h->got.offset &~ 1)); |
1512 | | |
1513 | | /* If this is a -Bsymbolic link, and the symbol is defined |
1514 | | locally, we just want to emit a RELATIVE reloc. Likewise if |
1515 | | the symbol was forced to be local because of a version file. |
1516 | | The entry in the global offset table will already have been |
1517 | | initialized in the relocate_section function. */ |
1518 | 0 | if (bfd_link_pic (info) |
1519 | 0 | && (info->symbolic |
1520 | 0 | || h->dynindx == -1 |
1521 | 0 | || h->forced_local) |
1522 | 0 | && h->def_regular) |
1523 | 0 | { |
1524 | 0 | rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
1525 | 0 | rela.r_addend = (h->root.u.def.value |
1526 | 0 | + h->root.u.def.section->output_section->vma |
1527 | 0 | + h->root.u.def.section->output_offset); |
1528 | 0 | } |
1529 | 0 | else |
1530 | 0 | { |
1531 | 0 | BFD_ASSERT ((h->got.offset & 1) == 0); |
1532 | 0 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
1533 | 0 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); |
1534 | 0 | rela.r_addend = 0; |
1535 | 0 | } |
1536 | |
|
1537 | 0 | loc = srela->contents; |
1538 | 0 | loc += srela->reloc_count * sizeof (Elf32_External_Rela); |
1539 | 0 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
1540 | 0 | ++srela->reloc_count; |
1541 | 0 | } |
1542 | |
|
1543 | 0 | if (h->needs_copy) |
1544 | 0 | { |
1545 | 0 | asection *s; |
1546 | 0 | Elf_Internal_Rela rela; |
1547 | | |
1548 | | /* This symbols needs a copy reloc. Set it up. */ |
1549 | 0 | BFD_ASSERT (h->dynindx != -1 |
1550 | 0 | && (h->root.type == bfd_link_hash_defined |
1551 | 0 | || h->root.type == bfd_link_hash_defweak)); |
1552 | |
|
1553 | 0 | s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss"); |
1554 | 0 | BFD_ASSERT (s != NULL); |
1555 | |
|
1556 | 0 | rela.r_offset = (h->root.u.def.value |
1557 | 0 | + h->root.u.def.section->output_section->vma |
1558 | 0 | + h->root.u.def.section->output_offset); |
1559 | 0 | rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY); |
1560 | 0 | rela.r_addend = 0; |
1561 | 0 | loc = s->contents; |
1562 | 0 | loc += s->reloc_count * sizeof (Elf32_External_Rela); |
1563 | 0 | bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
1564 | 0 | ++s->reloc_count; |
1565 | 0 | } |
1566 | | |
1567 | | /* Mark some specially defined symbols as absolute. */ |
1568 | 0 | if (h == htab->root.hdynamic || h == htab->root.hgot) |
1569 | 0 | sym->st_shndx = SHN_ABS; |
1570 | |
|
1571 | 0 | return true; |
1572 | 0 | } |
1573 | | |
1574 | | static enum elf_reloc_type_class |
1575 | | lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
1576 | | const asection *rel_sec ATTRIBUTE_UNUSED, |
1577 | | const Elf_Internal_Rela *rela) |
1578 | 0 | { |
1579 | 0 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
1580 | 0 | { |
1581 | 0 | case R_LM32_RELATIVE: return reloc_class_relative; |
1582 | 0 | case R_LM32_JMP_SLOT: return reloc_class_plt; |
1583 | 0 | case R_LM32_COPY: return reloc_class_copy; |
1584 | 0 | default: return reloc_class_normal; |
1585 | 0 | } |
1586 | 0 | } |
1587 | | |
1588 | | /* Adjust a symbol defined by a dynamic object and referenced by a |
1589 | | regular object. The current definition is in some section of the |
1590 | | dynamic object, but we're not including those sections. We have to |
1591 | | change the definition to something the rest of the link can |
1592 | | understand. */ |
1593 | | |
1594 | | static bool |
1595 | | lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
1596 | | struct elf_link_hash_entry *h) |
1597 | 0 | { |
1598 | 0 | struct elf_lm32_link_hash_table *htab; |
1599 | 0 | bfd *dynobj; |
1600 | 0 | asection *s; |
1601 | |
|
1602 | 0 | dynobj = elf_hash_table (info)->dynobj; |
1603 | | |
1604 | | /* Make sure we know what is going on here. */ |
1605 | 0 | BFD_ASSERT (dynobj != NULL |
1606 | 0 | && (h->needs_plt |
1607 | 0 | || h->is_weakalias |
1608 | 0 | || (h->def_dynamic |
1609 | 0 | && h->ref_regular |
1610 | 0 | && !h->def_regular))); |
1611 | | |
1612 | | /* If this is a function, put it in the procedure linkage table. We |
1613 | | will fill in the contents of the procedure linkage table later, |
1614 | | when we know the address of the .got section. */ |
1615 | 0 | if (h->type == STT_FUNC |
1616 | 0 | || h->needs_plt) |
1617 | 0 | { |
1618 | 0 | if (! bfd_link_pic (info) |
1619 | 0 | && !h->def_dynamic |
1620 | 0 | && !h->ref_dynamic |
1621 | 0 | && h->root.type != bfd_link_hash_undefweak |
1622 | 0 | && h->root.type != bfd_link_hash_undefined) |
1623 | 0 | { |
1624 | | /* This case can occur if we saw a PLT reloc in an input |
1625 | | file, but the symbol was never referred to by a dynamic |
1626 | | object. In such a case, we don't actually need to build |
1627 | | a procedure linkage table, and we can just do a PCREL |
1628 | | reloc instead. */ |
1629 | 0 | h->plt.offset = (bfd_vma) -1; |
1630 | 0 | h->needs_plt = 0; |
1631 | 0 | } |
1632 | |
|
1633 | 0 | return true; |
1634 | 0 | } |
1635 | 0 | else |
1636 | 0 | h->plt.offset = (bfd_vma) -1; |
1637 | | |
1638 | | /* If this is a weak symbol, and there is a real definition, the |
1639 | | processor independent code will have arranged for us to see the |
1640 | | real definition first, and we can just use the same value. */ |
1641 | 0 | if (h->is_weakalias) |
1642 | 0 | { |
1643 | 0 | struct elf_link_hash_entry *def = weakdef (h); |
1644 | 0 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
1645 | 0 | h->root.u.def.section = def->root.u.def.section; |
1646 | 0 | h->root.u.def.value = def->root.u.def.value; |
1647 | 0 | return true; |
1648 | 0 | } |
1649 | | |
1650 | | /* This is a reference to a symbol defined by a dynamic object which |
1651 | | is not a function. */ |
1652 | | |
1653 | | /* If we are creating a shared library, we must presume that the |
1654 | | only references to the symbol are via the global offset table. |
1655 | | For such cases we need not do anything here; the relocations will |
1656 | | be handled correctly by relocate_section. */ |
1657 | 0 | if (bfd_link_pic (info)) |
1658 | 0 | return true; |
1659 | | |
1660 | | /* If there are no references to this symbol that do not use the |
1661 | | GOT, we don't need to generate a copy reloc. */ |
1662 | 0 | if (!h->non_got_ref) |
1663 | 0 | return true; |
1664 | | |
1665 | | /* If -z nocopyreloc was given, we won't generate them either. */ |
1666 | 0 | if (0 && info->nocopyreloc) |
1667 | 0 | { |
1668 | 0 | h->non_got_ref = 0; |
1669 | 0 | return true; |
1670 | 0 | } |
1671 | | |
1672 | | /* If we don't find any dynamic relocs in read-only sections, then |
1673 | | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
1674 | 0 | if (0 && !_bfd_elf_readonly_dynrelocs (h)) |
1675 | 0 | { |
1676 | 0 | h->non_got_ref = 0; |
1677 | 0 | return true; |
1678 | 0 | } |
1679 | | |
1680 | | /* We must allocate the symbol in our .dynbss section, which will |
1681 | | become part of the .bss section of the executable. There will be |
1682 | | an entry for this symbol in the .dynsym section. The dynamic |
1683 | | object will contain position independent code, so all references |
1684 | | from the dynamic object to this symbol will go through the global |
1685 | | offset table. The dynamic linker will use the .dynsym entry to |
1686 | | determine the address it must put in the global offset table, so |
1687 | | both the dynamic object and the regular object will refer to the |
1688 | | same memory location for the variable. */ |
1689 | | |
1690 | 0 | htab = lm32_elf_hash_table (info); |
1691 | 0 | if (htab == NULL) |
1692 | 0 | return false; |
1693 | | |
1694 | 0 | s = htab->sdynbss; |
1695 | 0 | BFD_ASSERT (s != NULL); |
1696 | | |
1697 | | /* We must generate a R_LM32_COPY reloc to tell the dynamic linker |
1698 | | to copy the initial value out of the dynamic object and into the |
1699 | | runtime process image. We need to remember the offset into the |
1700 | | .rela.bss section we are going to use. */ |
1701 | 0 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
1702 | 0 | { |
1703 | 0 | asection *srel; |
1704 | |
|
1705 | 0 | srel = htab->srelbss; |
1706 | 0 | BFD_ASSERT (srel != NULL); |
1707 | 0 | srel->size += sizeof (Elf32_External_Rela); |
1708 | 0 | h->needs_copy = 1; |
1709 | 0 | } |
1710 | |
|
1711 | 0 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
1712 | 0 | } |
1713 | | |
1714 | | /* Allocate space in .plt, .got and associated reloc sections for |
1715 | | dynamic relocs. */ |
1716 | | |
1717 | | static bool |
1718 | | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
1719 | 0 | { |
1720 | 0 | struct bfd_link_info *info; |
1721 | 0 | struct elf_lm32_link_hash_table *htab; |
1722 | 0 | struct elf_dyn_relocs *p; |
1723 | |
|
1724 | 0 | if (h->root.type == bfd_link_hash_indirect) |
1725 | 0 | return true; |
1726 | | |
1727 | 0 | info = (struct bfd_link_info *) inf; |
1728 | 0 | htab = lm32_elf_hash_table (info); |
1729 | 0 | if (htab == NULL) |
1730 | 0 | return false; |
1731 | | |
1732 | 0 | if (htab->root.dynamic_sections_created |
1733 | 0 | && h->plt.refcount > 0) |
1734 | 0 | { |
1735 | | /* Make sure this symbol is output as a dynamic symbol. |
1736 | | Undefined weak syms won't yet be marked as dynamic. */ |
1737 | 0 | if (h->dynindx == -1 |
1738 | 0 | && !h->forced_local) |
1739 | 0 | { |
1740 | 0 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
1741 | 0 | return false; |
1742 | 0 | } |
1743 | | |
1744 | 0 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) |
1745 | 0 | { |
1746 | 0 | asection *s = htab->root.splt; |
1747 | | |
1748 | | /* If this is the first .plt entry, make room for the special |
1749 | | first entry. */ |
1750 | 0 | if (s->size == 0) |
1751 | 0 | s->size += PLT_ENTRY_SIZE; |
1752 | |
|
1753 | 0 | h->plt.offset = s->size; |
1754 | | |
1755 | | /* If this symbol is not defined in a regular file, and we are |
1756 | | not generating a shared library, then set the symbol to this |
1757 | | location in the .plt. This is required to make function |
1758 | | pointers compare as equal between the normal executable and |
1759 | | the shared library. */ |
1760 | 0 | if (! bfd_link_pic (info) |
1761 | 0 | && !h->def_regular) |
1762 | 0 | { |
1763 | 0 | h->root.u.def.section = s; |
1764 | 0 | h->root.u.def.value = h->plt.offset; |
1765 | 0 | } |
1766 | | |
1767 | | /* Make room for this entry. */ |
1768 | 0 | s->size += PLT_ENTRY_SIZE; |
1769 | | |
1770 | | /* We also need to make an entry in the .got.plt section, which |
1771 | | will be placed in the .got section by the linker script. */ |
1772 | 0 | htab->root.sgotplt->size += 4; |
1773 | | |
1774 | | /* We also need to make an entry in the .rel.plt section. */ |
1775 | 0 | htab->root.srelplt->size += sizeof (Elf32_External_Rela); |
1776 | 0 | } |
1777 | 0 | else |
1778 | 0 | { |
1779 | 0 | h->plt.offset = (bfd_vma) -1; |
1780 | 0 | h->needs_plt = 0; |
1781 | 0 | } |
1782 | 0 | } |
1783 | 0 | else |
1784 | 0 | { |
1785 | 0 | h->plt.offset = (bfd_vma) -1; |
1786 | 0 | h->needs_plt = 0; |
1787 | 0 | } |
1788 | | |
1789 | 0 | if (h->got.refcount > 0) |
1790 | 0 | { |
1791 | 0 | asection *s; |
1792 | 0 | bool dyn; |
1793 | | |
1794 | | /* Make sure this symbol is output as a dynamic symbol. |
1795 | | Undefined weak syms won't yet be marked as dynamic. */ |
1796 | 0 | if (h->dynindx == -1 |
1797 | 0 | && !h->forced_local) |
1798 | 0 | { |
1799 | 0 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
1800 | 0 | return false; |
1801 | 0 | } |
1802 | | |
1803 | 0 | s = htab->root.sgot; |
1804 | |
|
1805 | 0 | h->got.offset = s->size; |
1806 | 0 | s->size += 4; |
1807 | 0 | dyn = htab->root.dynamic_sections_created; |
1808 | 0 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) |
1809 | 0 | htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
1810 | 0 | } |
1811 | 0 | else |
1812 | 0 | h->got.offset = (bfd_vma) -1; |
1813 | | |
1814 | 0 | if (h->dyn_relocs == NULL) |
1815 | 0 | return true; |
1816 | | |
1817 | | /* In the shared -Bsymbolic case, discard space allocated for |
1818 | | dynamic pc-relative relocs against symbols which turn out to be |
1819 | | defined in regular objects. For the normal shared case, discard |
1820 | | space for pc-relative relocs that have become local due to symbol |
1821 | | visibility changes. */ |
1822 | | |
1823 | 0 | if (bfd_link_pic (info)) |
1824 | 0 | { |
1825 | 0 | if (h->def_regular |
1826 | 0 | && (h->forced_local |
1827 | 0 | || info->symbolic)) |
1828 | 0 | { |
1829 | 0 | struct elf_dyn_relocs **pp; |
1830 | |
|
1831 | 0 | for (pp = &h->dyn_relocs; (p = *pp) != NULL;) |
1832 | 0 | { |
1833 | 0 | p->count -= p->pc_count; |
1834 | 0 | p->pc_count = 0; |
1835 | 0 | if (p->count == 0) |
1836 | 0 | *pp = p->next; |
1837 | 0 | else |
1838 | 0 | pp = &p->next; |
1839 | 0 | } |
1840 | 0 | } |
1841 | | |
1842 | | /* Also discard relocs on undefined weak syms with non-default |
1843 | | visibility. */ |
1844 | 0 | if (h->dyn_relocs != NULL |
1845 | 0 | && h->root.type == bfd_link_hash_undefweak) |
1846 | 0 | { |
1847 | 0 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
1848 | 0 | h->dyn_relocs = NULL; |
1849 | | |
1850 | | /* Make sure undefined weak symbols are output as a dynamic |
1851 | | symbol in PIEs. */ |
1852 | 0 | else if (h->dynindx == -1 |
1853 | 0 | && !h->forced_local) |
1854 | 0 | { |
1855 | 0 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
1856 | 0 | return false; |
1857 | 0 | } |
1858 | 0 | } |
1859 | 0 | } |
1860 | 0 | else |
1861 | 0 | { |
1862 | | /* For the non-shared case, discard space for relocs against |
1863 | | symbols which turn out to need copy relocs or are not |
1864 | | dynamic. */ |
1865 | |
|
1866 | 0 | if (!h->non_got_ref |
1867 | 0 | && ((h->def_dynamic |
1868 | 0 | && !h->def_regular) |
1869 | 0 | || (htab->root.dynamic_sections_created |
1870 | 0 | && (h->root.type == bfd_link_hash_undefweak |
1871 | 0 | || h->root.type == bfd_link_hash_undefined)))) |
1872 | 0 | { |
1873 | | /* Make sure this symbol is output as a dynamic symbol. |
1874 | | Undefined weak syms won't yet be marked as dynamic. */ |
1875 | 0 | if (h->dynindx == -1 |
1876 | 0 | && !h->forced_local) |
1877 | 0 | { |
1878 | 0 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
1879 | 0 | return false; |
1880 | 0 | } |
1881 | | |
1882 | | /* If that succeeded, we know we'll be keeping all the |
1883 | | relocs. */ |
1884 | 0 | if (h->dynindx != -1) |
1885 | 0 | goto keep; |
1886 | 0 | } |
1887 | | |
1888 | 0 | h->dyn_relocs = NULL; |
1889 | |
|
1890 | 0 | keep: ; |
1891 | 0 | } |
1892 | | |
1893 | | /* Finally, allocate space. */ |
1894 | 0 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
1895 | 0 | { |
1896 | 0 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
1897 | 0 | sreloc->size += p->count * sizeof (Elf32_External_Rela); |
1898 | 0 | } |
1899 | |
|
1900 | 0 | return true; |
1901 | 0 | } |
1902 | | |
1903 | | /* Set the sizes of the dynamic sections. */ |
1904 | | |
1905 | | static bool |
1906 | | lm32_elf_late_size_sections (bfd *output_bfd, |
1907 | | struct bfd_link_info *info) |
1908 | 0 | { |
1909 | 0 | struct elf_lm32_link_hash_table *htab; |
1910 | 0 | bfd *dynobj; |
1911 | 0 | asection *s; |
1912 | 0 | bool relocs; |
1913 | 0 | bfd *ibfd; |
1914 | |
|
1915 | 0 | htab = lm32_elf_hash_table (info); |
1916 | 0 | if (htab == NULL) |
1917 | 0 | return false; |
1918 | | |
1919 | 0 | dynobj = htab->root.dynobj; |
1920 | 0 | if (dynobj == NULL) |
1921 | 0 | return true; |
1922 | | |
1923 | 0 | if (htab->root.dynamic_sections_created) |
1924 | 0 | { |
1925 | | /* Set the contents of the .interp section to the interpreter. */ |
1926 | 0 | if (bfd_link_executable (info) && !info->nointerp) |
1927 | 0 | { |
1928 | 0 | s = bfd_get_linker_section (dynobj, ".interp"); |
1929 | 0 | BFD_ASSERT (s != NULL); |
1930 | 0 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
1931 | 0 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1932 | 0 | s->alloced = 1; |
1933 | 0 | } |
1934 | 0 | } |
1935 | | |
1936 | | /* Set up .got offsets for local syms, and space for local dynamic |
1937 | | relocs. */ |
1938 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
1939 | 0 | { |
1940 | 0 | bfd_signed_vma *local_got; |
1941 | 0 | bfd_signed_vma *end_local_got; |
1942 | 0 | bfd_size_type locsymcount; |
1943 | 0 | Elf_Internal_Shdr *symtab_hdr; |
1944 | 0 | asection *srel; |
1945 | |
|
1946 | 0 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
1947 | 0 | continue; |
1948 | | |
1949 | 0 | for (s = ibfd->sections; s != NULL; s = s->next) |
1950 | 0 | { |
1951 | 0 | struct elf_dyn_relocs *p; |
1952 | |
|
1953 | 0 | for (p = ((struct elf_dyn_relocs *) |
1954 | 0 | elf_section_data (s)->local_dynrel); |
1955 | 0 | p != NULL; |
1956 | 0 | p = p->next) |
1957 | 0 | { |
1958 | 0 | if (! bfd_is_abs_section (p->sec) |
1959 | 0 | && bfd_is_abs_section (p->sec->output_section)) |
1960 | 0 | { |
1961 | | /* Input section has been discarded, either because |
1962 | | it is a copy of a linkonce section or due to |
1963 | | linker script /DISCARD/, so we'll be discarding |
1964 | | the relocs too. */ |
1965 | 0 | } |
1966 | 0 | else if (p->count != 0) |
1967 | 0 | { |
1968 | 0 | srel = elf_section_data (p->sec)->sreloc; |
1969 | 0 | srel->size += p->count * sizeof (Elf32_External_Rela); |
1970 | 0 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1971 | 0 | info->flags |= DF_TEXTREL; |
1972 | 0 | } |
1973 | 0 | } |
1974 | 0 | } |
1975 | |
|
1976 | 0 | local_got = elf_local_got_refcounts (ibfd); |
1977 | 0 | if (!local_got) |
1978 | 0 | continue; |
1979 | | |
1980 | 0 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
1981 | 0 | locsymcount = symtab_hdr->sh_info; |
1982 | 0 | end_local_got = local_got + locsymcount; |
1983 | 0 | s = htab->root.sgot; |
1984 | 0 | srel = htab->root.srelgot; |
1985 | 0 | for (; local_got < end_local_got; ++local_got) |
1986 | 0 | { |
1987 | 0 | if (*local_got > 0) |
1988 | 0 | { |
1989 | 0 | *local_got = s->size; |
1990 | 0 | s->size += 4; |
1991 | 0 | if (bfd_link_pic (info)) |
1992 | 0 | srel->size += sizeof (Elf32_External_Rela); |
1993 | 0 | } |
1994 | 0 | else |
1995 | 0 | *local_got = (bfd_vma) -1; |
1996 | 0 | } |
1997 | 0 | } |
1998 | | |
1999 | | /* Allocate global sym .plt and .got entries, and space for global |
2000 | | sym dynamic relocs. */ |
2001 | 0 | elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info); |
2002 | | |
2003 | | /* We now have determined the sizes of the various dynamic sections. |
2004 | | Allocate memory for them. */ |
2005 | 0 | relocs = false; |
2006 | 0 | for (s = dynobj->sections; s != NULL; s = s->next) |
2007 | 0 | { |
2008 | 0 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
2009 | 0 | continue; |
2010 | | |
2011 | 0 | if (s == htab->root.splt |
2012 | 0 | || s == htab->root.sgot |
2013 | 0 | || s == htab->root.sgotplt |
2014 | 0 | || s == htab->sdynbss) |
2015 | 0 | { |
2016 | | /* Strip this section if we don't need it; see the |
2017 | | comment below. */ |
2018 | 0 | } |
2019 | 0 | else if (startswith (bfd_section_name (s), ".rela")) |
2020 | 0 | { |
2021 | 0 | if (s->size != 0 && s != htab->root.srelplt) |
2022 | 0 | relocs = true; |
2023 | | |
2024 | | /* We use the reloc_count field as a counter if we need |
2025 | | to copy relocs into the output file. */ |
2026 | 0 | s->reloc_count = 0; |
2027 | 0 | } |
2028 | 0 | else |
2029 | | /* It's not one of our sections, so don't allocate space. */ |
2030 | 0 | continue; |
2031 | | |
2032 | 0 | if (s->size == 0) |
2033 | 0 | { |
2034 | | /* If we don't need this section, strip it from the |
2035 | | output file. This is mostly to handle .rela.bss and |
2036 | | .rela.plt. We must create both sections in |
2037 | | create_dynamic_sections, because they must be created |
2038 | | before the linker maps input sections to output |
2039 | | sections. The linker does that before |
2040 | | adjust_dynamic_symbol is called, and it is that |
2041 | | function which decides whether anything needs to go |
2042 | | into these sections. */ |
2043 | 0 | s->flags |= SEC_EXCLUDE; |
2044 | 0 | continue; |
2045 | 0 | } |
2046 | | |
2047 | 0 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2048 | 0 | continue; |
2049 | | |
2050 | | /* Allocate memory for the section contents. We use bfd_zalloc |
2051 | | here in case unused entries are not reclaimed before the |
2052 | | section's contents are written out. This should not happen, |
2053 | | but this way if it does, we get a R_LM32_NONE reloc instead |
2054 | | of garbage. */ |
2055 | 0 | s->contents = bfd_zalloc (dynobj, s->size); |
2056 | 0 | if (s->contents == NULL) |
2057 | 0 | return false; |
2058 | 0 | s->alloced = 1; |
2059 | 0 | } |
2060 | | |
2061 | 0 | if (!_bfd_elf_add_dynamic_tags (output_bfd, info, relocs)) |
2062 | 0 | return false; |
2063 | | |
2064 | | /* Allocate .rofixup section. */ |
2065 | 0 | if (IS_FDPIC (output_bfd)) |
2066 | 0 | { |
2067 | 0 | struct weak_symbol_list *list_start = NULL, *list_end = NULL; |
2068 | 0 | int rgot_weak_count = 0; |
2069 | 0 | int r32_count = 0; |
2070 | 0 | int rgot_count ATTRIBUTE_UNUSED = 0; |
2071 | | /* Look for deleted sections. */ |
2072 | 0 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
2073 | 0 | { |
2074 | 0 | for (s = ibfd->sections; s != NULL; s = s->next) |
2075 | 0 | { |
2076 | 0 | if (s->reloc_count) |
2077 | 0 | { |
2078 | | /* Count relocs that need .rofixup entires. */ |
2079 | 0 | Elf_Internal_Rela *internal_relocs, *end; |
2080 | 0 | internal_relocs = elf_section_data (s)->relocs; |
2081 | 0 | if (internal_relocs == NULL) |
2082 | 0 | internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, false)); |
2083 | 0 | if (internal_relocs != NULL) |
2084 | 0 | { |
2085 | 0 | end = internal_relocs + s->reloc_count; |
2086 | 0 | while (internal_relocs < end) |
2087 | 0 | { |
2088 | 0 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
2089 | 0 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
2090 | 0 | unsigned long r_symndx; |
2091 | 0 | struct elf_link_hash_entry *h; |
2092 | |
|
2093 | 0 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
2094 | 0 | sym_hashes = elf_sym_hashes (ibfd); |
2095 | 0 | r_symndx = ELF32_R_SYM (internal_relocs->r_info); |
2096 | 0 | h = NULL; |
2097 | 0 | if (r_symndx < symtab_hdr->sh_info) |
2098 | 0 | { |
2099 | 0 | } |
2100 | 0 | else |
2101 | 0 | { |
2102 | 0 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
2103 | 0 | while (h->root.type == bfd_link_hash_indirect |
2104 | 0 | || h->root.type == bfd_link_hash_warning) |
2105 | 0 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
2106 | 0 | } |
2107 | | |
2108 | | /* Don't generate entries for weak symbols. */ |
2109 | 0 | if (!h || (h && h->root.type != bfd_link_hash_undefweak)) |
2110 | 0 | { |
2111 | 0 | if (!discarded_section (s) && !((bfd_section_flags (s) & SEC_ALLOC) == 0)) |
2112 | 0 | { |
2113 | 0 | switch (ELF32_R_TYPE (internal_relocs->r_info)) |
2114 | 0 | { |
2115 | 0 | case R_LM32_32: |
2116 | 0 | r32_count++; |
2117 | 0 | break; |
2118 | 0 | case R_LM32_16_GOT: |
2119 | 0 | rgot_count++; |
2120 | 0 | break; |
2121 | 0 | } |
2122 | 0 | } |
2123 | 0 | } |
2124 | 0 | else |
2125 | 0 | { |
2126 | 0 | struct weak_symbol_list *current, *new_entry; |
2127 | | /* Is this symbol already in the list? */ |
2128 | 0 | for (current = list_start; current; current = current->next) |
2129 | 0 | { |
2130 | 0 | if (!strcmp (current->name, h->root.root.string)) |
2131 | 0 | break; |
2132 | 0 | } |
2133 | 0 | if (!current && !discarded_section (s) && (bfd_section_flags (s) & SEC_ALLOC)) |
2134 | 0 | { |
2135 | | /* Will this have an entry in the GOT. */ |
2136 | 0 | if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) |
2137 | 0 | { |
2138 | | /* Create a new entry. */ |
2139 | 0 | new_entry = malloc (sizeof (struct weak_symbol_list)); |
2140 | 0 | if (!new_entry) |
2141 | 0 | return false; |
2142 | 0 | new_entry->name = h->root.root.string; |
2143 | 0 | new_entry->next = NULL; |
2144 | | /* Add to list */ |
2145 | 0 | if (list_start == NULL) |
2146 | 0 | { |
2147 | 0 | list_start = new_entry; |
2148 | 0 | list_end = new_entry; |
2149 | 0 | } |
2150 | 0 | else |
2151 | 0 | { |
2152 | 0 | list_end->next = new_entry; |
2153 | 0 | list_end = new_entry; |
2154 | 0 | } |
2155 | | /* Increase count of undefined weak symbols in the got. */ |
2156 | 0 | rgot_weak_count++; |
2157 | 0 | } |
2158 | 0 | } |
2159 | 0 | } |
2160 | 0 | internal_relocs++; |
2161 | 0 | } |
2162 | 0 | } |
2163 | 0 | else |
2164 | 0 | return false; |
2165 | 0 | } |
2166 | 0 | } |
2167 | 0 | } |
2168 | | /* Free list. */ |
2169 | 0 | while (list_start) |
2170 | 0 | { |
2171 | 0 | list_end = list_start->next; |
2172 | 0 | free (list_start); |
2173 | 0 | list_start = list_end; |
2174 | 0 | } |
2175 | | |
2176 | | /* Size sections. */ |
2177 | 0 | lm32fdpic_fixup32_section (info)->size |
2178 | 0 | = (r32_count + (htab->root.sgot->size / 4) - rgot_weak_count + 1) * 4; |
2179 | 0 | if (lm32fdpic_fixup32_section (info)->size == 0) |
2180 | 0 | lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; |
2181 | 0 | else |
2182 | 0 | { |
2183 | 0 | lm32fdpic_fixup32_section (info)->contents = |
2184 | 0 | bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); |
2185 | 0 | if (lm32fdpic_fixup32_section (info)->contents == NULL) |
2186 | 0 | return false; |
2187 | 0 | lm32fdpic_fixup32_section (info)->alloced = 1; |
2188 | 0 | } |
2189 | 0 | } |
2190 | | |
2191 | 0 | return true; |
2192 | 0 | } |
2193 | | |
2194 | | /* Create dynamic sections when linking against a dynamic object. */ |
2195 | | |
2196 | | static bool |
2197 | | lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
2198 | 0 | { |
2199 | 0 | struct elf_lm32_link_hash_table *htab; |
2200 | 0 | flagword flags, pltflags; |
2201 | 0 | asection *s; |
2202 | 0 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
2203 | 0 | int ptralign = 2; /* 32bit */ |
2204 | |
|
2205 | 0 | htab = lm32_elf_hash_table (info); |
2206 | 0 | if (htab == NULL) |
2207 | 0 | return false; |
2208 | | |
2209 | | /* Make sure we have a GOT - For the case where we have a dynamic object |
2210 | | but none of the relocs in check_relocs */ |
2211 | 0 | if (!_bfd_elf_create_got_section (abfd, info)) |
2212 | 0 | return false; |
2213 | 0 | if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) |
2214 | 0 | { |
2215 | 0 | if (! create_rofixup_section (abfd, info)) |
2216 | 0 | return false; |
2217 | 0 | } |
2218 | | |
2219 | | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
2220 | | .rel[a].bss sections. */ |
2221 | 0 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
2222 | 0 | | SEC_LINKER_CREATED); |
2223 | |
|
2224 | 0 | pltflags = flags; |
2225 | 0 | pltflags |= SEC_CODE; |
2226 | 0 | if (bed->plt_not_loaded) |
2227 | 0 | pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); |
2228 | 0 | if (bed->plt_readonly) |
2229 | 0 | pltflags |= SEC_READONLY; |
2230 | |
|
2231 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
2232 | 0 | htab->root.splt = s; |
2233 | 0 | if (s == NULL |
2234 | 0 | || !bfd_set_section_alignment (s, bed->plt_alignment)) |
2235 | 0 | return false; |
2236 | | |
2237 | 0 | if (bed->want_plt_sym) |
2238 | 0 | { |
2239 | | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
2240 | | .plt section. */ |
2241 | 0 | struct bfd_link_hash_entry *bh = NULL; |
2242 | 0 | struct elf_link_hash_entry *h; |
2243 | |
|
2244 | 0 | if (! (_bfd_generic_link_add_one_symbol |
2245 | 0 | (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, |
2246 | 0 | (bfd_vma) 0, NULL, false, |
2247 | 0 | get_elf_backend_data (abfd)->collect, &bh))) |
2248 | 0 | return false; |
2249 | 0 | h = (struct elf_link_hash_entry *) bh; |
2250 | 0 | h->def_regular = 1; |
2251 | 0 | h->type = STT_OBJECT; |
2252 | 0 | htab->root.hplt = h; |
2253 | |
|
2254 | 0 | if (bfd_link_pic (info) |
2255 | 0 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
2256 | 0 | return false; |
2257 | 0 | } |
2258 | | |
2259 | 0 | s = bfd_make_section_anyway_with_flags (abfd, |
2260 | 0 | bed->default_use_rela_p |
2261 | 0 | ? ".rela.plt" : ".rel.plt", |
2262 | 0 | flags | SEC_READONLY); |
2263 | 0 | htab->root.srelplt = s; |
2264 | 0 | if (s == NULL |
2265 | 0 | || !bfd_set_section_alignment (s, ptralign)) |
2266 | 0 | return false; |
2267 | | |
2268 | 0 | if (htab->root.sgot == NULL |
2269 | 0 | && !_bfd_elf_create_got_section (abfd, info)) |
2270 | 0 | return false; |
2271 | | |
2272 | 0 | if (bed->want_dynbss) |
2273 | 0 | { |
2274 | | /* The .dynbss section is a place to put symbols which are defined |
2275 | | by dynamic objects, are referenced by regular objects, and are |
2276 | | not functions. We must allocate space for them in the process |
2277 | | image and use a R_*_COPY reloc to tell the dynamic linker to |
2278 | | initialize them at run time. The linker script puts the .dynbss |
2279 | | section into the .bss section of the final image. */ |
2280 | 0 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
2281 | 0 | SEC_ALLOC | SEC_LINKER_CREATED); |
2282 | 0 | htab->sdynbss = s; |
2283 | 0 | if (s == NULL) |
2284 | 0 | return false; |
2285 | | /* The .rel[a].bss section holds copy relocs. This section is not |
2286 | | normally needed. We need to create it here, though, so that the |
2287 | | linker will map it to an output section. We can't just create it |
2288 | | only if we need it, because we will not know whether we need it |
2289 | | until we have seen all the input files, and the first time the |
2290 | | main linker code calls BFD after examining all the input files |
2291 | | (size_dynamic_sections) the input sections have already been |
2292 | | mapped to the output sections. If the section turns out not to |
2293 | | be needed, we can discard it later. We will never need this |
2294 | | section when generating a shared object, since they do not use |
2295 | | copy relocs. */ |
2296 | 0 | if (! bfd_link_pic (info)) |
2297 | 0 | { |
2298 | 0 | s = bfd_make_section_anyway_with_flags (abfd, |
2299 | 0 | (bed->default_use_rela_p |
2300 | 0 | ? ".rela.bss" : ".rel.bss"), |
2301 | 0 | flags | SEC_READONLY); |
2302 | 0 | htab->srelbss = s; |
2303 | 0 | if (s == NULL |
2304 | 0 | || !bfd_set_section_alignment (s, ptralign)) |
2305 | 0 | return false; |
2306 | 0 | } |
2307 | 0 | } |
2308 | | |
2309 | 0 | return true; |
2310 | 0 | } |
2311 | | |
2312 | | static bool |
2313 | | lm32_elf_early_size_sections (bfd *output_bfd, struct bfd_link_info *info) |
2314 | 0 | { |
2315 | 0 | if (!bfd_link_relocatable (info)) |
2316 | 0 | { |
2317 | 0 | if (!bfd_elf_stack_segment_size (output_bfd, info, |
2318 | 0 | "__stacksize", DEFAULT_STACK_SIZE)) |
2319 | 0 | return false; |
2320 | | |
2321 | 0 | asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); |
2322 | 0 | if (sec) |
2323 | 0 | sec->size = info->stacksize >= 0 ? info->stacksize : 0; |
2324 | 0 | } |
2325 | | |
2326 | 0 | return true; |
2327 | 0 | } |
2328 | | |
2329 | | static bool |
2330 | | lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
2331 | 0 | { |
2332 | 0 | unsigned i; |
2333 | |
|
2334 | 0 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
2335 | 0 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
2336 | 0 | return true; |
2337 | | |
2338 | 0 | if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd)) |
2339 | 0 | return false; |
2340 | | |
2341 | 0 | if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr |
2342 | 0 | || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) |
2343 | 0 | return true; |
2344 | | |
2345 | | /* Copy the stack size. */ |
2346 | 0 | for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) |
2347 | 0 | if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) |
2348 | 0 | { |
2349 | 0 | Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; |
2350 | |
|
2351 | 0 | for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) |
2352 | 0 | if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) |
2353 | 0 | { |
2354 | 0 | memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); |
2355 | | |
2356 | | /* Rewrite the phdrs, since we're only called after they were first written. */ |
2357 | 0 | if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) |
2358 | 0 | ->s->sizeof_ehdr, SEEK_SET) != 0 |
2359 | 0 | || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, |
2360 | 0 | elf_elfheader (obfd)->e_phnum) != 0) |
2361 | 0 | return false; |
2362 | 0 | break; |
2363 | 0 | } |
2364 | | |
2365 | 0 | break; |
2366 | 0 | } |
2367 | | |
2368 | 0 | return true; |
2369 | 0 | } |
2370 | | |
2371 | | |
2372 | | #define ELF_ARCH bfd_arch_lm32 |
2373 | | #define ELF_TARGET_ID LM32_ELF_DATA |
2374 | | #define ELF_MACHINE_CODE EM_LATTICEMICO32 |
2375 | | #define ELF_MAXPAGESIZE 0x1000 |
2376 | | |
2377 | | #define TARGET_BIG_SYM lm32_elf32_vec |
2378 | | #define TARGET_BIG_NAME "elf32-lm32" |
2379 | | |
2380 | | #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup |
2381 | | #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup |
2382 | | #define elf_info_to_howto lm32_info_to_howto_rela |
2383 | | #define elf_info_to_howto_rel NULL |
2384 | | #define elf_backend_rela_normal 1 |
2385 | | #define elf_backend_object_p lm32_elf_object_p |
2386 | | #define elf_backend_final_write_processing lm32_elf_final_write_processing |
2387 | | #define elf_backend_stack_align 8 |
2388 | | #define elf_backend_can_gc_sections 1 |
2389 | | #define elf_backend_can_refcount 1 |
2390 | | #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook |
2391 | | #define elf_backend_plt_readonly 1 |
2392 | | #define elf_backend_want_got_plt 1 |
2393 | | #define elf_backend_want_plt_sym 0 |
2394 | | #define elf_backend_got_header_size 12 |
2395 | | #define elf_backend_dtrel_excludes_plt 1 |
2396 | | #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create |
2397 | | #define elf_backend_check_relocs lm32_elf_check_relocs |
2398 | | #define elf_backend_reloc_type_class lm32_elf_reloc_type_class |
2399 | | #define elf_backend_late_size_sections lm32_elf_late_size_sections |
2400 | | #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all |
2401 | | #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections |
2402 | | #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections |
2403 | | #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol |
2404 | | #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol |
2405 | | #define elf_backend_relocate_section lm32_elf_relocate_section |
2406 | | |
2407 | | #include "elf32-target.h" |
2408 | | |
2409 | | #undef ELF_MAXPAGESIZE |
2410 | | #define ELF_MAXPAGESIZE 0x4000 |
2411 | | |
2412 | | |
2413 | | #undef TARGET_BIG_SYM |
2414 | | #define TARGET_BIG_SYM lm32_elf32_fdpic_vec |
2415 | | #undef TARGET_BIG_NAME |
2416 | | #define TARGET_BIG_NAME "elf32-lm32fdpic" |
2417 | | #undef elf32_bed |
2418 | | #define elf32_bed elf32_lm32fdpic_bed |
2419 | | |
2420 | | #undef elf_backend_early_size_sections |
2421 | | #define elf_backend_early_size_sections lm32_elf_early_size_sections |
2422 | | #undef bfd_elf32_bfd_copy_private_bfd_data |
2423 | | #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data |
2424 | | |
2425 | | #include "elf32-target.h" |