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252b5132 | 1 | /* ELF linker support. |
79349b09 | 2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 | 4 | |
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
ae9a127f NC |
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 2 of the License, or | |
10 | (at your option) any later version. | |
252b5132 | 11 | |
ae9a127f NC |
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. | |
252b5132 | 16 | |
ae9a127f NC |
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
252b5132 RH |
20 | |
21 | /* ELF linker code. */ | |
22 | ||
268b6b39 | 23 | static bfd_boolean elf_section_ignore_discarded_relocs (asection *); |
252b5132 | 24 | |
252b5132 RH |
25 | /* Final phase of ELF linker. */ |
26 | ||
27 | /* A structure we use to avoid passing large numbers of arguments. */ | |
28 | ||
29 | struct elf_final_link_info | |
30 | { | |
31 | /* General link information. */ | |
32 | struct bfd_link_info *info; | |
33 | /* Output BFD. */ | |
34 | bfd *output_bfd; | |
35 | /* Symbol string table. */ | |
36 | struct bfd_strtab_hash *symstrtab; | |
37 | /* .dynsym section. */ | |
38 | asection *dynsym_sec; | |
39 | /* .hash section. */ | |
40 | asection *hash_sec; | |
41 | /* symbol version section (.gnu.version). */ | |
42 | asection *symver_sec; | |
43 | /* Buffer large enough to hold contents of any section. */ | |
44 | bfd_byte *contents; | |
45 | /* Buffer large enough to hold external relocs of any section. */ | |
268b6b39 | 46 | void *external_relocs; |
252b5132 RH |
47 | /* Buffer large enough to hold internal relocs of any section. */ |
48 | Elf_Internal_Rela *internal_relocs; | |
49 | /* Buffer large enough to hold external local symbols of any input | |
50 | BFD. */ | |
140f6c8e | 51 | bfd_byte *external_syms; |
9ad5cbcf AM |
52 | /* And a buffer for symbol section indices. */ |
53 | Elf_External_Sym_Shndx *locsym_shndx; | |
252b5132 RH |
54 | /* Buffer large enough to hold internal local symbols of any input |
55 | BFD. */ | |
56 | Elf_Internal_Sym *internal_syms; | |
57 | /* Array large enough to hold a symbol index for each local symbol | |
58 | of any input BFD. */ | |
59 | long *indices; | |
60 | /* Array large enough to hold a section pointer for each local | |
61 | symbol of any input BFD. */ | |
62 | asection **sections; | |
63 | /* Buffer to hold swapped out symbols. */ | |
140f6c8e | 64 | bfd_byte *symbuf; |
9ad5cbcf AM |
65 | /* And one for symbol section indices. */ |
66 | Elf_External_Sym_Shndx *symshndxbuf; | |
252b5132 RH |
67 | /* Number of swapped out symbols in buffer. */ |
68 | size_t symbuf_count; | |
69 | /* Number of symbols which fit in symbuf. */ | |
70 | size_t symbuf_size; | |
c97e73dd AM |
71 | /* And same for symshndxbuf. */ |
72 | size_t shndxbuf_size; | |
252b5132 RH |
73 | }; |
74 | ||
b34976b6 | 75 | static bfd_boolean elf_link_output_sym |
754021d0 AM |
76 | (struct elf_final_link_info *, const char *, Elf_Internal_Sym *, asection *, |
77 | struct elf_link_hash_entry *); | |
b34976b6 | 78 | static bfd_boolean elf_link_flush_output_syms |
140f6c8e | 79 | (struct elf_final_link_info *, const struct elf_backend_data *); |
b34976b6 | 80 | static bfd_boolean elf_link_output_extsym |
268b6b39 | 81 | (struct elf_link_hash_entry *, void *); |
b34976b6 | 82 | static bfd_boolean elf_link_input_bfd |
268b6b39 | 83 | (struct elf_final_link_info *, bfd *); |
b34976b6 | 84 | static bfd_boolean elf_reloc_link_order |
268b6b39 | 85 | (bfd *, struct bfd_link_info *, asection *, struct bfd_link_order *); |
252b5132 RH |
86 | |
87 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
88 | ||
89 | struct elf_outext_info | |
90 | { | |
b34976b6 AM |
91 | bfd_boolean failed; |
92 | bfd_boolean localsyms; | |
252b5132 RH |
93 | struct elf_final_link_info *finfo; |
94 | }; | |
95 | ||
1049f94e | 96 | /* When performing a relocatable link, the input relocations are |
31367b81 MM |
97 | preserved. But, if they reference global symbols, the indices |
98 | referenced must be updated. Update all the relocations in | |
99 | REL_HDR (there are COUNT of them), using the data in REL_HASH. */ | |
100 | ||
101 | static void | |
268b6b39 AM |
102 | elf_link_adjust_relocs (bfd *abfd, |
103 | Elf_Internal_Shdr *rel_hdr, | |
104 | unsigned int count, | |
105 | struct elf_link_hash_entry **rel_hash) | |
31367b81 MM |
106 | { |
107 | unsigned int i; | |
9c5bfbb7 | 108 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
947216bf | 109 | bfd_byte *erela; |
268b6b39 AM |
110 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
111 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
140f6c8e AM |
112 | bfd_vma r_type_mask; |
113 | int r_sym_shift; | |
209f668e | 114 | |
140f6c8e | 115 | if (rel_hdr->sh_entsize == bed->s->sizeof_rel) |
209f668e | 116 | { |
947216bf AM |
117 | swap_in = bed->s->swap_reloc_in; |
118 | swap_out = bed->s->swap_reloc_out; | |
209f668e | 119 | } |
140f6c8e | 120 | else if (rel_hdr->sh_entsize == bed->s->sizeof_rela) |
209f668e | 121 | { |
947216bf AM |
122 | swap_in = bed->s->swap_reloca_in; |
123 | swap_out = bed->s->swap_reloca_out; | |
209f668e | 124 | } |
947216bf AM |
125 | else |
126 | abort (); | |
127 | ||
128 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
129 | abort (); | |
31367b81 | 130 | |
140f6c8e AM |
131 | if (bed->s->arch_size == 32) |
132 | { | |
133 | r_type_mask = 0xff; | |
134 | r_sym_shift = 8; | |
135 | } | |
136 | else | |
137 | { | |
138 | r_type_mask = 0xffffffff; | |
139 | r_sym_shift = 32; | |
140 | } | |
141 | ||
947216bf AM |
142 | erela = rel_hdr->contents; |
143 | for (i = 0; i < count; i++, rel_hash++, erela += rel_hdr->sh_entsize) | |
31367b81 | 144 | { |
947216bf AM |
145 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; |
146 | unsigned int j; | |
147 | ||
31367b81 MM |
148 | if (*rel_hash == NULL) |
149 | continue; | |
150 | ||
151 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
152 | ||
947216bf AM |
153 | (*swap_in) (abfd, erela, irela); |
154 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
140f6c8e AM |
155 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift |
156 | | (irela[j].r_info & r_type_mask)); | |
947216bf | 157 | (*swap_out) (abfd, irela, erela); |
31367b81 MM |
158 | } |
159 | } | |
160 | ||
58821868 AM |
161 | struct elf_link_sort_rela |
162 | { | |
140f6c8e AM |
163 | union { |
164 | bfd_vma offset; | |
165 | bfd_vma sym_mask; | |
166 | } u; | |
db6751f2 | 167 | enum elf_reloc_type_class type; |
947216bf AM |
168 | /* We use this as an array of size int_rels_per_ext_rel. */ |
169 | Elf_Internal_Rela rela[1]; | |
db6751f2 JJ |
170 | }; |
171 | ||
172 | static int | |
268b6b39 | 173 | elf_link_sort_cmp1 (const void *A, const void *B) |
db6751f2 | 174 | { |
268b6b39 AM |
175 | const struct elf_link_sort_rela *a = A; |
176 | const struct elf_link_sort_rela *b = B; | |
db6751f2 JJ |
177 | int relativea, relativeb; |
178 | ||
179 | relativea = a->type == reloc_class_relative; | |
180 | relativeb = b->type == reloc_class_relative; | |
181 | ||
182 | if (relativea < relativeb) | |
db6751f2 | 183 | return 1; |
fcfbdf31 JJ |
184 | if (relativea > relativeb) |
185 | return -1; | |
140f6c8e | 186 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) |
db6751f2 | 187 | return -1; |
140f6c8e | 188 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) |
db6751f2 | 189 | return 1; |
947216bf | 190 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 191 | return -1; |
947216bf | 192 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
193 | return 1; |
194 | return 0; | |
195 | } | |
196 | ||
197 | static int | |
268b6b39 | 198 | elf_link_sort_cmp2 (const void *A, const void *B) |
db6751f2 | 199 | { |
268b6b39 AM |
200 | const struct elf_link_sort_rela *a = A; |
201 | const struct elf_link_sort_rela *b = B; | |
db6751f2 JJ |
202 | int copya, copyb; |
203 | ||
140f6c8e | 204 | if (a->u.offset < b->u.offset) |
db6751f2 | 205 | return -1; |
140f6c8e | 206 | if (a->u.offset > b->u.offset) |
db6751f2 | 207 | return 1; |
290394d6 JJ |
208 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); |
209 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
db6751f2 JJ |
210 | if (copya < copyb) |
211 | return -1; | |
212 | if (copya > copyb) | |
213 | return 1; | |
947216bf | 214 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 215 | return -1; |
947216bf | 216 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
217 | return 1; |
218 | return 0; | |
219 | } | |
220 | ||
221 | static size_t | |
268b6b39 | 222 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) |
db6751f2 | 223 | { |
e717da7e | 224 | asection *reldyn; |
f51e552e | 225 | bfd_size_type count, size; |
947216bf AM |
226 | size_t i, ret, sort_elt, ext_size; |
227 | bfd_byte *sort, *s_non_relative, *p; | |
228 | struct elf_link_sort_rela *sq; | |
9c5bfbb7 | 229 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
033fd5f9 | 230 | int i2e = bed->s->int_rels_per_ext_rel; |
268b6b39 AM |
231 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
232 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
e717da7e | 233 | struct bfd_link_order *lo; |
140f6c8e | 234 | bfd_vma r_sym_mask; |
db6751f2 JJ |
235 | |
236 | reldyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
237 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
238 | { | |
239 | reldyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
240 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
241 | return 0; | |
140f6c8e | 242 | ext_size = bed->s->sizeof_rel; |
947216bf AM |
243 | swap_in = bed->s->swap_reloc_in; |
244 | swap_out = bed->s->swap_reloc_out; | |
db6751f2 JJ |
245 | } |
246 | else | |
947216bf | 247 | { |
140f6c8e | 248 | ext_size = bed->s->sizeof_rela; |
947216bf AM |
249 | swap_in = bed->s->swap_reloca_in; |
250 | swap_out = bed->s->swap_reloca_out; | |
251 | } | |
252 | count = reldyn->_raw_size / ext_size; | |
db6751f2 JJ |
253 | |
254 | size = 0; | |
e717da7e AM |
255 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
256 | if (lo->type == bfd_indirect_link_order) | |
257 | { | |
258 | asection *o = lo->u.indirect.section; | |
259 | size += o->_raw_size; | |
260 | } | |
db6751f2 JJ |
261 | |
262 | if (size != reldyn->_raw_size) | |
263 | return 0; | |
264 | ||
947216bf AM |
265 | sort_elt = (sizeof (struct elf_link_sort_rela) |
266 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
267 | sort = bfd_zmalloc (sort_elt * count); | |
268 | if (sort == NULL) | |
db6751f2 JJ |
269 | { |
270 | (*info->callbacks->warning) | |
268b6b39 | 271 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); |
db6751f2 JJ |
272 | return 0; |
273 | } | |
274 | ||
140f6c8e AM |
275 | if (bed->s->arch_size == 32) |
276 | r_sym_mask = ~(bfd_vma) 0xff; | |
277 | else | |
278 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
279 | ||
e717da7e AM |
280 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
281 | if (lo->type == bfd_indirect_link_order) | |
db6751f2 | 282 | { |
947216bf | 283 | bfd_byte *erel, *erelend; |
e717da7e | 284 | asection *o = lo->u.indirect.section; |
db6751f2 | 285 | |
947216bf AM |
286 | erel = o->contents; |
287 | erelend = o->contents + o->_raw_size; | |
288 | p = sort + o->output_offset / ext_size * sort_elt; | |
289 | while (erel < erelend) | |
db6751f2 | 290 | { |
947216bf AM |
291 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
292 | (*swap_in) (abfd, erel, s->rela); | |
293 | s->type = (*bed->elf_backend_reloc_type_class) (s->rela); | |
140f6c8e | 294 | s->u.sym_mask = r_sym_mask; |
947216bf AM |
295 | p += sort_elt; |
296 | erel += ext_size; | |
db6751f2 JJ |
297 | } |
298 | } | |
299 | ||
268b6b39 | 300 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); |
947216bf AM |
301 | |
302 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
db6751f2 | 303 | { |
947216bf AM |
304 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
305 | if (s->type != reloc_class_relative) | |
306 | break; | |
db6751f2 | 307 | } |
947216bf AM |
308 | ret = i; |
309 | s_non_relative = p; | |
310 | ||
311 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
312 | for (; i < count; i++, p += sort_elt) | |
313 | { | |
314 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
140f6c8e | 315 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) |
947216bf | 316 | sq = sp; |
140f6c8e | 317 | sp->u.offset = sq->rela->r_offset; |
947216bf AM |
318 | } |
319 | ||
268b6b39 | 320 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); |
dc810e39 | 321 | |
e717da7e AM |
322 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
323 | if (lo->type == bfd_indirect_link_order) | |
db6751f2 | 324 | { |
947216bf | 325 | bfd_byte *erel, *erelend; |
e717da7e | 326 | asection *o = lo->u.indirect.section; |
db6751f2 | 327 | |
947216bf AM |
328 | erel = o->contents; |
329 | erelend = o->contents + o->_raw_size; | |
330 | p = sort + o->output_offset / ext_size * sort_elt; | |
331 | while (erel < erelend) | |
db6751f2 | 332 | { |
947216bf AM |
333 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
334 | (*swap_out) (abfd, s->rela, erel); | |
335 | p += sort_elt; | |
336 | erel += ext_size; | |
db6751f2 JJ |
337 | } |
338 | } | |
339 | ||
5ed6aba4 | 340 | free (sort); |
db6751f2 JJ |
341 | *psec = reldyn; |
342 | return ret; | |
343 | } | |
344 | ||
252b5132 RH |
345 | /* Do the final step of an ELF link. */ |
346 | ||
b34976b6 | 347 | bfd_boolean |
268b6b39 | 348 | elf_bfd_final_link (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 349 | { |
b34976b6 AM |
350 | bfd_boolean dynamic; |
351 | bfd_boolean emit_relocs; | |
252b5132 RH |
352 | bfd *dynobj; |
353 | struct elf_final_link_info finfo; | |
354 | register asection *o; | |
355 | register struct bfd_link_order *p; | |
356 | register bfd *sub; | |
dc810e39 AM |
357 | bfd_size_type max_contents_size; |
358 | bfd_size_type max_external_reloc_size; | |
359 | bfd_size_type max_internal_reloc_count; | |
360 | bfd_size_type max_sym_count; | |
9ad5cbcf | 361 | bfd_size_type max_sym_shndx_count; |
252b5132 RH |
362 | file_ptr off; |
363 | Elf_Internal_Sym elfsym; | |
364 | unsigned int i; | |
365 | Elf_Internal_Shdr *symtab_hdr; | |
c97e73dd | 366 | Elf_Internal_Shdr *symtab_shndx_hdr; |
252b5132 | 367 | Elf_Internal_Shdr *symstrtab_hdr; |
9c5bfbb7 | 368 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 | 369 | struct elf_outext_info eoinfo; |
b34976b6 | 370 | bfd_boolean merged; |
db6751f2 JJ |
371 | size_t relativecount = 0; |
372 | asection *reldyn = 0; | |
dc810e39 | 373 | bfd_size_type amt; |
252b5132 | 374 | |
0eddce27 | 375 | if (! is_elf_hash_table (info->hash)) |
b34976b6 | 376 | return FALSE; |
8ea2e4bd | 377 | |
252b5132 RH |
378 | if (info->shared) |
379 | abfd->flags |= DYNAMIC; | |
380 | ||
381 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
382 | dynobj = elf_hash_table (info)->dynobj; | |
383 | ||
1049f94e | 384 | emit_relocs = (info->relocatable |
c44233aa AM |
385 | || info->emitrelocations |
386 | || bed->elf_backend_emit_relocs); | |
9317eacc | 387 | |
252b5132 RH |
388 | finfo.info = info; |
389 | finfo.output_bfd = abfd; | |
140f6c8e | 390 | finfo.symstrtab = _bfd_elf_stringtab_init (); |
252b5132 | 391 | if (finfo.symstrtab == NULL) |
b34976b6 | 392 | return FALSE; |
252b5132 RH |
393 | |
394 | if (! dynamic) | |
395 | { | |
396 | finfo.dynsym_sec = NULL; | |
397 | finfo.hash_sec = NULL; | |
398 | finfo.symver_sec = NULL; | |
399 | } | |
400 | else | |
401 | { | |
402 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
403 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
404 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
405 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
406 | /* Note that it is OK if symver_sec is NULL. */ | |
407 | } | |
408 | ||
409 | finfo.contents = NULL; | |
410 | finfo.external_relocs = NULL; | |
411 | finfo.internal_relocs = NULL; | |
412 | finfo.external_syms = NULL; | |
9ad5cbcf | 413 | finfo.locsym_shndx = NULL; |
252b5132 RH |
414 | finfo.internal_syms = NULL; |
415 | finfo.indices = NULL; | |
416 | finfo.sections = NULL; | |
417 | finfo.symbuf = NULL; | |
9ad5cbcf | 418 | finfo.symshndxbuf = NULL; |
252b5132 | 419 | finfo.symbuf_count = 0; |
c97e73dd | 420 | finfo.shndxbuf_size = 0; |
252b5132 RH |
421 | |
422 | /* Count up the number of relocations we will output for each output | |
423 | section, so that we know the sizes of the reloc sections. We | |
424 | also figure out some maximum sizes. */ | |
425 | max_contents_size = 0; | |
426 | max_external_reloc_size = 0; | |
427 | max_internal_reloc_count = 0; | |
428 | max_sym_count = 0; | |
9ad5cbcf | 429 | max_sym_shndx_count = 0; |
b34976b6 | 430 | merged = FALSE; |
268b6b39 | 431 | for (o = abfd->sections; o != NULL; o = o->next) |
252b5132 | 432 | { |
3f9a32bd | 433 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
252b5132 RH |
434 | o->reloc_count = 0; |
435 | ||
436 | for (p = o->link_order_head; p != NULL; p = p->next) | |
437 | { | |
3f9a32bd AM |
438 | unsigned int reloc_count = 0; |
439 | struct bfd_elf_section_data *esdi = NULL; | |
440 | unsigned int *rel_count1; | |
441 | ||
252b5132 RH |
442 | if (p->type == bfd_section_reloc_link_order |
443 | || p->type == bfd_symbol_reloc_link_order) | |
3f9a32bd | 444 | reloc_count = 1; |
252b5132 RH |
445 | else if (p->type == bfd_indirect_link_order) |
446 | { | |
447 | asection *sec; | |
448 | ||
449 | sec = p->u.indirect.section; | |
3f9a32bd | 450 | esdi = elf_section_data (sec); |
252b5132 RH |
451 | |
452 | /* Mark all sections which are to be included in the | |
453 | link. This will normally be every section. We need | |
454 | to do this so that we can identify any sections which | |
455 | the linker has decided to not include. */ | |
b34976b6 | 456 | sec->linker_mark = TRUE; |
252b5132 | 457 | |
f5fa8ca2 | 458 | if (sec->flags & SEC_MERGE) |
b34976b6 | 459 | merged = TRUE; |
f5fa8ca2 | 460 | |
1049f94e | 461 | if (info->relocatable || info->emitrelocations) |
3f9a32bd | 462 | reloc_count = sec->reloc_count; |
c44233aa | 463 | else if (bed->elf_backend_count_relocs) |
9317eacc CM |
464 | { |
465 | Elf_Internal_Rela * relocs; | |
466 | ||
268b6b39 AM |
467 | relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
468 | info->keep_memory); | |
9317eacc | 469 | |
3f9a32bd | 470 | reloc_count = (*bed->elf_backend_count_relocs) (sec, relocs); |
9317eacc | 471 | |
6cdc0ccc | 472 | if (elf_section_data (o)->relocs != relocs) |
9317eacc CM |
473 | free (relocs); |
474 | } | |
252b5132 RH |
475 | |
476 | if (sec->_raw_size > max_contents_size) | |
477 | max_contents_size = sec->_raw_size; | |
478 | if (sec->_cooked_size > max_contents_size) | |
479 | max_contents_size = sec->_cooked_size; | |
480 | ||
481 | /* We are interested in just local symbols, not all | |
482 | symbols. */ | |
483 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
484 | && (sec->owner->flags & DYNAMIC) == 0) | |
485 | { | |
486 | size_t sym_count; | |
487 | ||
488 | if (elf_bad_symtab (sec->owner)) | |
489 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
140f6c8e | 490 | / bed->s->sizeof_sym); |
252b5132 RH |
491 | else |
492 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
493 | ||
494 | if (sym_count > max_sym_count) | |
495 | max_sym_count = sym_count; | |
496 | ||
9ad5cbcf AM |
497 | if (sym_count > max_sym_shndx_count |
498 | && elf_symtab_shndx (sec->owner) != 0) | |
499 | max_sym_shndx_count = sym_count; | |
500 | ||
252b5132 RH |
501 | if ((sec->flags & SEC_RELOC) != 0) |
502 | { | |
503 | size_t ext_size; | |
504 | ||
505 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
506 | if (ext_size > max_external_reloc_size) | |
507 | max_external_reloc_size = ext_size; | |
508 | if (sec->reloc_count > max_internal_reloc_count) | |
509 | max_internal_reloc_count = sec->reloc_count; | |
510 | } | |
511 | } | |
512 | } | |
3f9a32bd AM |
513 | |
514 | if (reloc_count == 0) | |
515 | continue; | |
516 | ||
517 | o->reloc_count += reloc_count; | |
518 | ||
519 | /* MIPS may have a mix of REL and RELA relocs on sections. | |
520 | To support this curious ABI we keep reloc counts in | |
521 | elf_section_data too. We must be careful to add the | |
522 | relocations from the input section to the right output | |
523 | count. FIXME: Get rid of one count. We have | |
524 | o->reloc_count == esdo->rel_count + esdo->rel_count2. */ | |
525 | rel_count1 = &esdo->rel_count; | |
526 | if (esdi != NULL) | |
527 | { | |
528 | bfd_boolean same_size; | |
529 | bfd_size_type entsize1; | |
530 | ||
531 | entsize1 = esdi->rel_hdr.sh_entsize; | |
140f6c8e AM |
532 | BFD_ASSERT (entsize1 == bed->s->sizeof_rel |
533 | || entsize1 == bed->s->sizeof_rela); | |
534 | same_size = !o->use_rela_p == (entsize1 == bed->s->sizeof_rel); | |
3f9a32bd AM |
535 | |
536 | if (!same_size) | |
537 | rel_count1 = &esdo->rel_count2; | |
538 | ||
539 | if (esdi->rel_hdr2 != NULL) | |
540 | { | |
541 | bfd_size_type entsize2 = esdi->rel_hdr2->sh_entsize; | |
542 | unsigned int alt_count; | |
543 | unsigned int *rel_count2; | |
544 | ||
545 | BFD_ASSERT (entsize2 != entsize1 | |
140f6c8e AM |
546 | && (entsize2 == bed->s->sizeof_rel |
547 | || entsize2 == bed->s->sizeof_rela)); | |
3f9a32bd AM |
548 | |
549 | rel_count2 = &esdo->rel_count2; | |
550 | if (!same_size) | |
551 | rel_count2 = &esdo->rel_count; | |
552 | ||
553 | /* The following is probably too simplistic if the | |
554 | backend counts output relocs unusually. */ | |
555 | BFD_ASSERT (bed->elf_backend_count_relocs == NULL); | |
556 | alt_count = NUM_SHDR_ENTRIES (esdi->rel_hdr2); | |
557 | *rel_count2 += alt_count; | |
558 | reloc_count -= alt_count; | |
559 | } | |
560 | } | |
561 | *rel_count1 += reloc_count; | |
252b5132 RH |
562 | } |
563 | ||
564 | if (o->reloc_count > 0) | |
565 | o->flags |= SEC_RELOC; | |
566 | else | |
567 | { | |
568 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
569 | set it (this is probably a bug) and if it is set | |
570 | assign_section_numbers will create a reloc section. */ | |
571 | o->flags &=~ SEC_RELOC; | |
572 | } | |
573 | ||
574 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
575 | zero. This is done in elf_fake_sections as well, but forcing | |
576 | the VMA to 0 here will ensure that relocs against these | |
577 | sections are handled correctly. */ | |
578 | if ((o->flags & SEC_ALLOC) == 0 | |
579 | && ! o->user_set_vma) | |
580 | o->vma = 0; | |
581 | } | |
582 | ||
1049f94e | 583 | if (! info->relocatable && merged) |
f5fa8ca2 | 584 | elf_link_hash_traverse (elf_hash_table (info), |
268b6b39 | 585 | _bfd_elf_link_sec_merge_syms, abfd); |
f5fa8ca2 | 586 | |
252b5132 RH |
587 | /* Figure out the file positions for everything but the symbol table |
588 | and the relocs. We set symcount to force assign_section_numbers | |
589 | to create a symbol table. */ | |
590 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
591 | BFD_ASSERT (! abfd->output_has_begun); | |
592 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
593 | goto error_return; | |
594 | ||
595 | /* That created the reloc sections. Set their sizes, and assign | |
596 | them file positions, and allocate some buffers. */ | |
597 | for (o = abfd->sections; o != NULL; o = o->next) | |
598 | { | |
599 | if ((o->flags & SEC_RELOC) != 0) | |
600 | { | |
45d6a902 AM |
601 | if (!(_bfd_elf_link_size_reloc_section |
602 | (abfd, &elf_section_data (o)->rel_hdr, o))) | |
252b5132 RH |
603 | goto error_return; |
604 | ||
23bc299b | 605 | if (elf_section_data (o)->rel_hdr2 |
45d6a902 AM |
606 | && !(_bfd_elf_link_size_reloc_section |
607 | (abfd, elf_section_data (o)->rel_hdr2, o))) | |
252b5132 | 608 | goto error_return; |
252b5132 | 609 | } |
b037af20 MM |
610 | |
611 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
3e932841 | 612 | to count upwards while actually outputting the relocations. */ |
b037af20 MM |
613 | elf_section_data (o)->rel_count = 0; |
614 | elf_section_data (o)->rel_count2 = 0; | |
252b5132 RH |
615 | } |
616 | ||
617 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
618 | ||
619 | /* We have now assigned file positions for all the sections except | |
620 | .symtab and .strtab. We start the .symtab section at the current | |
621 | file position, and write directly to it. We build the .strtab | |
622 | section in memory. */ | |
623 | bfd_get_symcount (abfd) = 0; | |
624 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
625 | /* sh_name is set in prep_headers. */ | |
626 | symtab_hdr->sh_type = SHT_SYMTAB; | |
c97e73dd | 627 | /* sh_flags, sh_addr and sh_size all start off zero. */ |
140f6c8e | 628 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; |
252b5132 RH |
629 | /* sh_link is set in assign_section_numbers. */ |
630 | /* sh_info is set below. */ | |
631 | /* sh_offset is set just below. */ | |
45d6a902 | 632 | symtab_hdr->sh_addralign = 1 << bed->s->log_file_align; |
252b5132 RH |
633 | |
634 | off = elf_tdata (abfd)->next_file_pos; | |
b34976b6 | 635 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); |
252b5132 RH |
636 | |
637 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
638 | incorrect. We do not yet know the size of the .symtab section. | |
639 | We correct next_file_pos below, after we do know the size. */ | |
640 | ||
641 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
642 | continuously seeking to the right position in the file. */ | |
643 | if (! info->keep_memory || max_sym_count < 20) | |
644 | finfo.symbuf_size = 20; | |
645 | else | |
646 | finfo.symbuf_size = max_sym_count; | |
dc810e39 | 647 | amt = finfo.symbuf_size; |
140f6c8e | 648 | amt *= bed->s->sizeof_sym; |
268b6b39 | 649 | finfo.symbuf = bfd_malloc (amt); |
252b5132 RH |
650 | if (finfo.symbuf == NULL) |
651 | goto error_return; | |
9ad5cbcf AM |
652 | if (elf_numsections (abfd) > SHN_LORESERVE) |
653 | { | |
c97e73dd AM |
654 | /* Wild guess at number of output symbols. realloc'd as needed. */ |
655 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
656 | finfo.shndxbuf_size = amt; | |
9ad5cbcf | 657 | amt *= sizeof (Elf_External_Sym_Shndx); |
268b6b39 | 658 | finfo.symshndxbuf = bfd_zmalloc (amt); |
9ad5cbcf AM |
659 | if (finfo.symshndxbuf == NULL) |
660 | goto error_return; | |
661 | } | |
252b5132 RH |
662 | |
663 | /* Start writing out the symbol table. The first symbol is always a | |
664 | dummy symbol. */ | |
9317eacc CM |
665 | if (info->strip != strip_all |
666 | || emit_relocs) | |
252b5132 RH |
667 | { |
668 | elfsym.st_value = 0; | |
669 | elfsym.st_size = 0; | |
670 | elfsym.st_info = 0; | |
671 | elfsym.st_other = 0; | |
672 | elfsym.st_shndx = SHN_UNDEF; | |
754021d0 AM |
673 | if (! elf_link_output_sym (&finfo, NULL, &elfsym, bfd_und_section_ptr, |
674 | NULL)) | |
252b5132 RH |
675 | goto error_return; |
676 | } | |
677 | ||
678 | #if 0 | |
679 | /* Some standard ELF linkers do this, but we don't because it causes | |
680 | bootstrap comparison failures. */ | |
681 | /* Output a file symbol for the output file as the second symbol. | |
682 | We output this even if we are discarding local symbols, although | |
683 | I'm not sure if this is correct. */ | |
684 | elfsym.st_value = 0; | |
685 | elfsym.st_size = 0; | |
686 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
687 | elfsym.st_other = 0; | |
688 | elfsym.st_shndx = SHN_ABS; | |
689 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
754021d0 | 690 | &elfsym, bfd_abs_section_ptr, NULL)) |
252b5132 RH |
691 | goto error_return; |
692 | #endif | |
693 | ||
694 | /* Output a symbol for each section. We output these even if we are | |
695 | discarding local symbols, since they are used for relocs. These | |
696 | symbols have no names. We store the index of each one in the | |
697 | index field of the section, so that we can find it again when | |
698 | outputting relocs. */ | |
9317eacc CM |
699 | if (info->strip != strip_all |
700 | || emit_relocs) | |
252b5132 RH |
701 | { |
702 | elfsym.st_size = 0; | |
703 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
704 | elfsym.st_other = 0; | |
9ad5cbcf | 705 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 | 706 | { |
140f6c8e | 707 | o = bfd_section_from_elf_index (abfd, i); |
252b5132 RH |
708 | if (o != NULL) |
709 | o->target_index = bfd_get_symcount (abfd); | |
710 | elfsym.st_shndx = i; | |
1049f94e | 711 | if (info->relocatable || o == NULL) |
252b5132 RH |
712 | elfsym.st_value = 0; |
713 | else | |
714 | elfsym.st_value = o->vma; | |
754021d0 | 715 | if (! elf_link_output_sym (&finfo, NULL, &elfsym, o, NULL)) |
252b5132 | 716 | goto error_return; |
c97e73dd | 717 | if (i == SHN_LORESERVE - 1) |
9ad5cbcf | 718 | i += SHN_HIRESERVE + 1 - SHN_LORESERVE; |
252b5132 RH |
719 | } |
720 | } | |
721 | ||
722 | /* Allocate some memory to hold information read in from the input | |
723 | files. */ | |
9ad5cbcf AM |
724 | if (max_contents_size != 0) |
725 | { | |
268b6b39 | 726 | finfo.contents = bfd_malloc (max_contents_size); |
9ad5cbcf AM |
727 | if (finfo.contents == NULL) |
728 | goto error_return; | |
729 | } | |
730 | ||
731 | if (max_external_reloc_size != 0) | |
732 | { | |
268b6b39 | 733 | finfo.external_relocs = bfd_malloc (max_external_reloc_size); |
9ad5cbcf AM |
734 | if (finfo.external_relocs == NULL) |
735 | goto error_return; | |
736 | } | |
737 | ||
738 | if (max_internal_reloc_count != 0) | |
739 | { | |
740 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
741 | amt *= sizeof (Elf_Internal_Rela); | |
268b6b39 | 742 | finfo.internal_relocs = bfd_malloc (amt); |
9ad5cbcf AM |
743 | if (finfo.internal_relocs == NULL) |
744 | goto error_return; | |
745 | } | |
746 | ||
747 | if (max_sym_count != 0) | |
748 | { | |
140f6c8e | 749 | amt = max_sym_count * bed->s->sizeof_sym; |
268b6b39 | 750 | finfo.external_syms = bfd_malloc (amt); |
9ad5cbcf AM |
751 | if (finfo.external_syms == NULL) |
752 | goto error_return; | |
753 | ||
754 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
268b6b39 | 755 | finfo.internal_syms = bfd_malloc (amt); |
9ad5cbcf AM |
756 | if (finfo.internal_syms == NULL) |
757 | goto error_return; | |
758 | ||
759 | amt = max_sym_count * sizeof (long); | |
268b6b39 | 760 | finfo.indices = bfd_malloc (amt); |
9ad5cbcf AM |
761 | if (finfo.indices == NULL) |
762 | goto error_return; | |
763 | ||
764 | amt = max_sym_count * sizeof (asection *); | |
268b6b39 | 765 | finfo.sections = bfd_malloc (amt); |
9ad5cbcf AM |
766 | if (finfo.sections == NULL) |
767 | goto error_return; | |
768 | } | |
769 | ||
770 | if (max_sym_shndx_count != 0) | |
771 | { | |
772 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
268b6b39 | 773 | finfo.locsym_shndx = bfd_malloc (amt); |
9ad5cbcf AM |
774 | if (finfo.locsym_shndx == NULL) |
775 | goto error_return; | |
776 | } | |
252b5132 | 777 | |
e1918d23 | 778 | if (elf_hash_table (info)->tls_sec) |
13ae64f3 | 779 | { |
e1918d23 | 780 | bfd_vma base, end = 0; |
13ae64f3 JJ |
781 | asection *sec; |
782 | ||
e1918d23 | 783 | for (sec = elf_hash_table (info)->tls_sec; |
13ae64f3 JJ |
784 | sec && (sec->flags & SEC_THREAD_LOCAL); |
785 | sec = sec->next) | |
786 | { | |
787 | bfd_vma size = sec->_raw_size; | |
788 | ||
e1918d23 | 789 | if (size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0) |
13ae64f3 JJ |
790 | { |
791 | struct bfd_link_order *o; | |
792 | ||
13ae64f3 JJ |
793 | for (o = sec->link_order_head; o != NULL; o = o->next) |
794 | if (size < o->offset + o->size) | |
58821868 | 795 | size = o->offset + o->size; |
13ae64f3 JJ |
796 | } |
797 | end = sec->vma + size; | |
798 | } | |
e1918d23 AM |
799 | base = elf_hash_table (info)->tls_sec->vma; |
800 | end = align_power (end, elf_hash_table (info)->tls_sec->alignment_power); | |
801 | elf_hash_table (info)->tls_size = end - base; | |
13ae64f3 JJ |
802 | } |
803 | ||
252b5132 RH |
804 | /* Since ELF permits relocations to be against local symbols, we |
805 | must have the local symbols available when we do the relocations. | |
806 | Since we would rather only read the local symbols once, and we | |
807 | would rather not keep them in memory, we handle all the | |
808 | relocations for a single input file at the same time. | |
809 | ||
810 | Unfortunately, there is no way to know the total number of local | |
811 | symbols until we have seen all of them, and the local symbol | |
812 | indices precede the global symbol indices. This means that when | |
1049f94e | 813 | we are generating relocatable output, and we see a reloc against |
252b5132 RH |
814 | a global symbol, we can not know the symbol index until we have |
815 | finished examining all the local symbols to see which ones we are | |
816 | going to output. To deal with this, we keep the relocations in | |
817 | memory, and don't output them until the end of the link. This is | |
818 | an unfortunate waste of memory, but I don't see a good way around | |
1049f94e | 819 | it. Fortunately, it only happens when performing a relocatable |
252b5132 RH |
820 | link, which is not the common case. FIXME: If keep_memory is set |
821 | we could write the relocs out and then read them again; I don't | |
822 | know how bad the memory loss will be. */ | |
823 | ||
824 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
b34976b6 | 825 | sub->output_has_begun = FALSE; |
252b5132 RH |
826 | for (o = abfd->sections; o != NULL; o = o->next) |
827 | { | |
828 | for (p = o->link_order_head; p != NULL; p = p->next) | |
829 | { | |
830 | if (p->type == bfd_indirect_link_order | |
a50c1845 | 831 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) |
4ddafab0 | 832 | == bfd_target_elf_flavour) |
a50c1845 | 833 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) |
252b5132 | 834 | { |
252b5132 RH |
835 | if (! sub->output_has_begun) |
836 | { | |
837 | if (! elf_link_input_bfd (&finfo, sub)) | |
838 | goto error_return; | |
b34976b6 | 839 | sub->output_has_begun = TRUE; |
252b5132 RH |
840 | } |
841 | } | |
842 | else if (p->type == bfd_section_reloc_link_order | |
843 | || p->type == bfd_symbol_reloc_link_order) | |
844 | { | |
845 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
846 | goto error_return; | |
847 | } | |
848 | else | |
849 | { | |
850 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
851 | goto error_return; | |
852 | } | |
853 | } | |
854 | } | |
855 | ||
c44233aa AM |
856 | /* Output any global symbols that got converted to local in a |
857 | version script or due to symbol visibility. We do this in a | |
858 | separate step since ELF requires all local symbols to appear | |
859 | prior to any global symbols. FIXME: We should only do this if | |
860 | some global symbols were, in fact, converted to become local. | |
861 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
b34976b6 | 862 | eoinfo.failed = FALSE; |
c44233aa | 863 | eoinfo.finfo = &finfo; |
b34976b6 | 864 | eoinfo.localsyms = TRUE; |
c44233aa | 865 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
268b6b39 | 866 | &eoinfo); |
c44233aa | 867 | if (eoinfo.failed) |
b34976b6 | 868 | return FALSE; |
c44233aa | 869 | |
252b5132 | 870 | /* That wrote out all the local symbols. Finish up the symbol table |
5cc7c785 L |
871 | with the global symbols. Even if we want to strip everything we |
872 | can, we still need to deal with those global symbols that got | |
3e932841 | 873 | converted to local in a version script. */ |
252b5132 | 874 | |
30b30c21 | 875 | /* The sh_info field records the index of the first non local symbol. */ |
252b5132 | 876 | symtab_hdr->sh_info = bfd_get_symcount (abfd); |
30b30c21 | 877 | |
fc8c40a0 AM |
878 | if (dynamic |
879 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
30b30c21 RH |
880 | { |
881 | Elf_Internal_Sym sym; | |
140f6c8e | 882 | bfd_byte *dynsym = finfo.dynsym_sec->contents; |
71a40b32 | 883 | long last_local = 0; |
30b30c21 RH |
884 | |
885 | /* Write out the section symbols for the output sections. */ | |
886 | if (info->shared) | |
887 | { | |
888 | asection *s; | |
889 | ||
890 | sym.st_size = 0; | |
891 | sym.st_name = 0; | |
892 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
893 | sym.st_other = 0; | |
894 | ||
895 | for (s = abfd->sections; s != NULL; s = s->next) | |
896 | { | |
897 | int indx; | |
140f6c8e AM |
898 | bfd_byte *dest; |
899 | long dynindx; | |
9ad5cbcf | 900 | |
30b30c21 | 901 | indx = elf_section_data (s)->this_idx; |
140f6c8e | 902 | dynindx = elf_section_data (s)->dynindx; |
30b30c21 RH |
903 | BFD_ASSERT (indx > 0); |
904 | sym.st_shndx = indx; | |
905 | sym.st_value = s->vma; | |
140f6c8e AM |
906 | dest = dynsym + dynindx * bed->s->sizeof_sym; |
907 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
30b30c21 RH |
908 | } |
909 | ||
910 | last_local = bfd_count_sections (abfd); | |
911 | } | |
912 | ||
913 | /* Write out the local dynsyms. */ | |
914 | if (elf_hash_table (info)->dynlocal) | |
915 | { | |
916 | struct elf_link_local_dynamic_entry *e; | |
917 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
918 | { | |
318da145 | 919 | asection *s; |
140f6c8e | 920 | bfd_byte *dest; |
30b30c21 | 921 | |
b037af20 MM |
922 | sym.st_size = e->isym.st_size; |
923 | sym.st_other = e->isym.st_other; | |
924 | ||
1fa0ddb3 RH |
925 | /* Copy the internal symbol as is. |
926 | Note that we saved a word of storage and overwrote | |
c44233aa AM |
927 | the original st_name with the dynstr_index. */ |
928 | sym = e->isym; | |
30b30c21 | 929 | |
c8e5ddc8 | 930 | if (e->isym.st_shndx != SHN_UNDEF |
58821868 AM |
931 | && (e->isym.st_shndx < SHN_LORESERVE |
932 | || e->isym.st_shndx > SHN_HIRESERVE)) | |
587ff49e RH |
933 | { |
934 | s = bfd_section_from_elf_index (e->input_bfd, | |
935 | e->isym.st_shndx); | |
936 | ||
937 | sym.st_shndx = | |
938 | elf_section_data (s->output_section)->this_idx; | |
939 | sym.st_value = (s->output_section->vma | |
940 | + s->output_offset | |
941 | + e->isym.st_value); | |
942 | } | |
30b30c21 RH |
943 | |
944 | if (last_local < e->dynindx) | |
945 | last_local = e->dynindx; | |
946 | ||
140f6c8e AM |
947 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; |
948 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
30b30c21 RH |
949 | } |
950 | } | |
951 | ||
71a40b32 ILT |
952 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = |
953 | last_local + 1; | |
30b30c21 | 954 | } |
252b5132 RH |
955 | |
956 | /* We get the global symbols from the hash table. */ | |
b34976b6 AM |
957 | eoinfo.failed = FALSE; |
958 | eoinfo.localsyms = FALSE; | |
252b5132 RH |
959 | eoinfo.finfo = &finfo; |
960 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
268b6b39 | 961 | &eoinfo); |
252b5132 | 962 | if (eoinfo.failed) |
b34976b6 | 963 | return FALSE; |
252b5132 | 964 | |
587ff49e RH |
965 | /* If backend needs to output some symbols not present in the hash |
966 | table, do it now. */ | |
967 | if (bed->elf_backend_output_arch_syms) | |
968 | { | |
b34976b6 | 969 | typedef bfd_boolean (*out_sym_func) |
754021d0 AM |
970 | (void *, const char *, Elf_Internal_Sym *, asection *, |
971 | struct elf_link_hash_entry *); | |
dc810e39 AM |
972 | |
973 | if (! ((*bed->elf_backend_output_arch_syms) | |
268b6b39 | 974 | (abfd, info, &finfo, (out_sym_func) elf_link_output_sym))) |
b34976b6 | 975 | return FALSE; |
3e932841 | 976 | } |
587ff49e | 977 | |
252b5132 | 978 | /* Flush all symbols to the file. */ |
140f6c8e | 979 | if (! elf_link_flush_output_syms (&finfo, bed)) |
b34976b6 | 980 | return FALSE; |
252b5132 RH |
981 | |
982 | /* Now we know the size of the symtab section. */ | |
983 | off += symtab_hdr->sh_size; | |
984 | ||
c97e73dd AM |
985 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
986 | if (symtab_shndx_hdr->sh_name != 0) | |
987 | { | |
988 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
989 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
990 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
991 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
992 | symtab_shndx_hdr->sh_size = amt; | |
993 | ||
994 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
b34976b6 | 995 | off, TRUE); |
c97e73dd AM |
996 | |
997 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
268b6b39 | 998 | || (bfd_bwrite (finfo.symshndxbuf, amt, abfd) != amt)) |
b34976b6 | 999 | return FALSE; |
c97e73dd AM |
1000 | } |
1001 | ||
1002 | ||
252b5132 RH |
1003 | /* Finish up and write out the symbol string table (.strtab) |
1004 | section. */ | |
1005 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
1006 | /* sh_name was set in prep_headers. */ | |
1007 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
1008 | symstrtab_hdr->sh_flags = 0; | |
1009 | symstrtab_hdr->sh_addr = 0; | |
1010 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
1011 | symstrtab_hdr->sh_entsize = 0; | |
1012 | symstrtab_hdr->sh_link = 0; | |
1013 | symstrtab_hdr->sh_info = 0; | |
1014 | /* sh_offset is set just below. */ | |
1015 | symstrtab_hdr->sh_addralign = 1; | |
1016 | ||
b34976b6 | 1017 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); |
252b5132 RH |
1018 | elf_tdata (abfd)->next_file_pos = off; |
1019 | ||
1020 | if (bfd_get_symcount (abfd) > 0) | |
1021 | { | |
1022 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
1023 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
b34976b6 | 1024 | return FALSE; |
252b5132 RH |
1025 | } |
1026 | ||
1027 | /* Adjust the relocs to have the correct symbol indices. */ | |
1028 | for (o = abfd->sections; o != NULL; o = o->next) | |
1029 | { | |
252b5132 RH |
1030 | if ((o->flags & SEC_RELOC) == 0) |
1031 | continue; | |
1032 | ||
3e932841 | 1033 | elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr, |
31367b81 MM |
1034 | elf_section_data (o)->rel_count, |
1035 | elf_section_data (o)->rel_hashes); | |
1036 | if (elf_section_data (o)->rel_hdr2 != NULL) | |
1037 | elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2, | |
1038 | elf_section_data (o)->rel_count2, | |
3e932841 | 1039 | (elf_section_data (o)->rel_hashes |
31367b81 | 1040 | + elf_section_data (o)->rel_count)); |
252b5132 RH |
1041 | |
1042 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
1043 | trying to swap the relocs out itself. */ | |
1044 | o->reloc_count = 0; | |
1045 | } | |
1046 | ||
db6751f2 JJ |
1047 | if (dynamic && info->combreloc && dynobj != NULL) |
1048 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
1049 | ||
252b5132 RH |
1050 | /* If we are linking against a dynamic object, or generating a |
1051 | shared library, finish up the dynamic linking information. */ | |
1052 | if (dynamic) | |
1053 | { | |
140f6c8e | 1054 | bfd_byte *dyncon, *dynconend; |
252b5132 RH |
1055 | |
1056 | /* Fix up .dynamic entries. */ | |
1057 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1058 | BFD_ASSERT (o != NULL); | |
1059 | ||
140f6c8e AM |
1060 | dyncon = o->contents; |
1061 | dynconend = o->contents + o->_raw_size; | |
1062 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
252b5132 RH |
1063 | { |
1064 | Elf_Internal_Dyn dyn; | |
1065 | const char *name; | |
1066 | unsigned int type; | |
1067 | ||
140f6c8e | 1068 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); |
252b5132 RH |
1069 | |
1070 | switch (dyn.d_tag) | |
1071 | { | |
1072 | default: | |
140f6c8e | 1073 | continue; |
db6751f2 | 1074 | case DT_NULL: |
140f6c8e | 1075 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) |
db6751f2 JJ |
1076 | { |
1077 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
1078 | { | |
1079 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
1080 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
140f6c8e | 1081 | default: continue; |
db6751f2 | 1082 | } |
140f6c8e AM |
1083 | dyn.d_un.d_val = relativecount; |
1084 | relativecount = 0; | |
1085 | break; | |
db6751f2 | 1086 | } |
140f6c8e AM |
1087 | continue; |
1088 | ||
252b5132 | 1089 | case DT_INIT: |
f0c2e336 | 1090 | name = info->init_function; |
252b5132 RH |
1091 | goto get_sym; |
1092 | case DT_FINI: | |
f0c2e336 | 1093 | name = info->fini_function; |
252b5132 RH |
1094 | get_sym: |
1095 | { | |
1096 | struct elf_link_hash_entry *h; | |
1097 | ||
1098 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 1099 | FALSE, FALSE, TRUE); |
252b5132 RH |
1100 | if (h != NULL |
1101 | && (h->root.type == bfd_link_hash_defined | |
1102 | || h->root.type == bfd_link_hash_defweak)) | |
1103 | { | |
1104 | dyn.d_un.d_val = h->root.u.def.value; | |
1105 | o = h->root.u.def.section; | |
1106 | if (o->output_section != NULL) | |
1107 | dyn.d_un.d_val += (o->output_section->vma | |
1108 | + o->output_offset); | |
1109 | else | |
1110 | { | |
1111 | /* The symbol is imported from another shared | |
1112 | library and does not apply to this one. */ | |
1113 | dyn.d_un.d_val = 0; | |
1114 | } | |
140f6c8e | 1115 | break; |
252b5132 RH |
1116 | } |
1117 | } | |
140f6c8e | 1118 | continue; |
252b5132 | 1119 | |
30831527 RH |
1120 | case DT_PREINIT_ARRAYSZ: |
1121 | name = ".preinit_array"; | |
1122 | goto get_size; | |
1123 | case DT_INIT_ARRAYSZ: | |
1124 | name = ".init_array"; | |
1125 | goto get_size; | |
1126 | case DT_FINI_ARRAYSZ: | |
1127 | name = ".fini_array"; | |
1128 | get_size: | |
1129 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
1130 | if (o == NULL) |
1131 | { | |
1132 | (*_bfd_error_handler) | |
1133 | (_("%s: could not find output section %s"), | |
1134 | bfd_get_filename (abfd), name); | |
1135 | goto error_return; | |
1136 | } | |
25e27870 L |
1137 | if (o->_raw_size == 0) |
1138 | (*_bfd_error_handler) | |
1139 | (_("warning: %s section has zero size"), name); | |
30831527 | 1140 | dyn.d_un.d_val = o->_raw_size; |
30831527 RH |
1141 | break; |
1142 | ||
1143 | case DT_PREINIT_ARRAY: | |
1144 | name = ".preinit_array"; | |
1145 | goto get_vma; | |
1146 | case DT_INIT_ARRAY: | |
1147 | name = ".init_array"; | |
1148 | goto get_vma; | |
1149 | case DT_FINI_ARRAY: | |
1150 | name = ".fini_array"; | |
1151 | goto get_vma; | |
1152 | ||
252b5132 RH |
1153 | case DT_HASH: |
1154 | name = ".hash"; | |
1155 | goto get_vma; | |
1156 | case DT_STRTAB: | |
1157 | name = ".dynstr"; | |
1158 | goto get_vma; | |
1159 | case DT_SYMTAB: | |
1160 | name = ".dynsym"; | |
1161 | goto get_vma; | |
1162 | case DT_VERDEF: | |
1163 | name = ".gnu.version_d"; | |
1164 | goto get_vma; | |
1165 | case DT_VERNEED: | |
1166 | name = ".gnu.version_r"; | |
1167 | goto get_vma; | |
1168 | case DT_VERSYM: | |
1169 | name = ".gnu.version"; | |
1170 | get_vma: | |
1171 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
1172 | if (o == NULL) |
1173 | { | |
1174 | (*_bfd_error_handler) | |
1175 | (_("%s: could not find output section %s"), | |
1176 | bfd_get_filename (abfd), name); | |
1177 | goto error_return; | |
1178 | } | |
252b5132 | 1179 | dyn.d_un.d_ptr = o->vma; |
252b5132 RH |
1180 | break; |
1181 | ||
1182 | case DT_REL: | |
1183 | case DT_RELA: | |
1184 | case DT_RELSZ: | |
1185 | case DT_RELASZ: | |
1186 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
1187 | type = SHT_REL; | |
1188 | else | |
1189 | type = SHT_RELA; | |
1190 | dyn.d_un.d_val = 0; | |
9ad5cbcf | 1191 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
1192 | { |
1193 | Elf_Internal_Shdr *hdr; | |
1194 | ||
1195 | hdr = elf_elfsections (abfd)[i]; | |
1196 | if (hdr->sh_type == type | |
1197 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
1198 | { | |
1199 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
1200 | dyn.d_un.d_val += hdr->sh_size; | |
1201 | else | |
1202 | { | |
1203 | if (dyn.d_un.d_val == 0 | |
1204 | || hdr->sh_addr < dyn.d_un.d_val) | |
1205 | dyn.d_un.d_val = hdr->sh_addr; | |
1206 | } | |
1207 | } | |
1208 | } | |
252b5132 RH |
1209 | break; |
1210 | } | |
140f6c8e | 1211 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); |
252b5132 RH |
1212 | } |
1213 | } | |
1214 | ||
1215 | /* If we have created any dynamic sections, then output them. */ | |
1216 | if (dynobj != NULL) | |
1217 | { | |
1218 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
1219 | goto error_return; | |
1220 | ||
1221 | for (o = dynobj->sections; o != NULL; o = o->next) | |
1222 | { | |
1223 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
fc8c40a0 AM |
1224 | || o->_raw_size == 0 |
1225 | || o->output_section == bfd_abs_section_ptr) | |
252b5132 RH |
1226 | continue; |
1227 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
1228 | { | |
1229 | /* At this point, we are only interested in sections | |
45d6a902 | 1230 | created by _bfd_elf_link_create_dynamic_sections. */ |
252b5132 RH |
1231 | continue; |
1232 | } | |
1233 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
1234 | != SHT_STRTAB) | |
1235 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
1236 | { | |
1237 | if (! bfd_set_section_contents (abfd, o->output_section, | |
dc810e39 AM |
1238 | o->contents, |
1239 | (file_ptr) o->output_offset, | |
252b5132 RH |
1240 | o->_raw_size)) |
1241 | goto error_return; | |
1242 | } | |
1243 | else | |
1244 | { | |
252b5132 | 1245 | /* The contents of the .dynstr section are actually in a |
c44233aa | 1246 | stringtab. */ |
252b5132 RH |
1247 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
1248 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
2b0f7ef9 JJ |
1249 | || ! _bfd_elf_strtab_emit (abfd, |
1250 | elf_hash_table (info)->dynstr)) | |
252b5132 RH |
1251 | goto error_return; |
1252 | } | |
1253 | } | |
1254 | } | |
1255 | ||
1049f94e | 1256 | if (info->relocatable) |
1126897b | 1257 | { |
b34976b6 | 1258 | bfd_boolean failed = FALSE; |
1126897b AM |
1259 | |
1260 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
1261 | if (failed) | |
1262 | goto error_return; | |
1263 | } | |
1264 | ||
252b5132 RH |
1265 | /* If we have optimized stabs strings, output them. */ |
1266 | if (elf_hash_table (info)->stab_info != NULL) | |
1267 | { | |
1268 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
1269 | goto error_return; | |
1270 | } | |
1271 | ||
126495ed | 1272 | if (info->eh_frame_hdr) |
65765700 | 1273 | { |
126495ed AM |
1274 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
1275 | goto error_return; | |
65765700 JJ |
1276 | } |
1277 | ||
252b5132 RH |
1278 | if (finfo.symstrtab != NULL) |
1279 | _bfd_stringtab_free (finfo.symstrtab); | |
1280 | if (finfo.contents != NULL) | |
1281 | free (finfo.contents); | |
1282 | if (finfo.external_relocs != NULL) | |
1283 | free (finfo.external_relocs); | |
1284 | if (finfo.internal_relocs != NULL) | |
1285 | free (finfo.internal_relocs); | |
1286 | if (finfo.external_syms != NULL) | |
1287 | free (finfo.external_syms); | |
9ad5cbcf AM |
1288 | if (finfo.locsym_shndx != NULL) |
1289 | free (finfo.locsym_shndx); | |
252b5132 RH |
1290 | if (finfo.internal_syms != NULL) |
1291 | free (finfo.internal_syms); | |
1292 | if (finfo.indices != NULL) | |
1293 | free (finfo.indices); | |
1294 | if (finfo.sections != NULL) | |
1295 | free (finfo.sections); | |
1296 | if (finfo.symbuf != NULL) | |
1297 | free (finfo.symbuf); | |
9ad5cbcf | 1298 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 1299 | free (finfo.symshndxbuf); |
252b5132 RH |
1300 | for (o = abfd->sections; o != NULL; o = o->next) |
1301 | { | |
1302 | if ((o->flags & SEC_RELOC) != 0 | |
1303 | && elf_section_data (o)->rel_hashes != NULL) | |
c44233aa | 1304 | free (elf_section_data (o)->rel_hashes); |
252b5132 RH |
1305 | } |
1306 | ||
b34976b6 | 1307 | elf_tdata (abfd)->linker = TRUE; |
252b5132 | 1308 | |
b34976b6 | 1309 | return TRUE; |
252b5132 RH |
1310 | |
1311 | error_return: | |
1312 | if (finfo.symstrtab != NULL) | |
1313 | _bfd_stringtab_free (finfo.symstrtab); | |
1314 | if (finfo.contents != NULL) | |
1315 | free (finfo.contents); | |
1316 | if (finfo.external_relocs != NULL) | |
1317 | free (finfo.external_relocs); | |
1318 | if (finfo.internal_relocs != NULL) | |
1319 | free (finfo.internal_relocs); | |
1320 | if (finfo.external_syms != NULL) | |
1321 | free (finfo.external_syms); | |
9ad5cbcf AM |
1322 | if (finfo.locsym_shndx != NULL) |
1323 | free (finfo.locsym_shndx); | |
252b5132 RH |
1324 | if (finfo.internal_syms != NULL) |
1325 | free (finfo.internal_syms); | |
1326 | if (finfo.indices != NULL) | |
1327 | free (finfo.indices); | |
1328 | if (finfo.sections != NULL) | |
1329 | free (finfo.sections); | |
1330 | if (finfo.symbuf != NULL) | |
1331 | free (finfo.symbuf); | |
9ad5cbcf | 1332 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 1333 | free (finfo.symshndxbuf); |
252b5132 RH |
1334 | for (o = abfd->sections; o != NULL; o = o->next) |
1335 | { | |
1336 | if ((o->flags & SEC_RELOC) != 0 | |
1337 | && elf_section_data (o)->rel_hashes != NULL) | |
1338 | free (elf_section_data (o)->rel_hashes); | |
1339 | } | |
1340 | ||
b34976b6 | 1341 | return FALSE; |
252b5132 RH |
1342 | } |
1343 | ||
1344 | /* Add a symbol to the output symbol table. */ | |
1345 | ||
b34976b6 | 1346 | static bfd_boolean |
268b6b39 AM |
1347 | elf_link_output_sym (struct elf_final_link_info *finfo, |
1348 | const char *name, | |
1349 | Elf_Internal_Sym *elfsym, | |
754021d0 AM |
1350 | asection *input_sec, |
1351 | struct elf_link_hash_entry *h) | |
252b5132 | 1352 | { |
140f6c8e | 1353 | bfd_byte *dest; |
9ad5cbcf | 1354 | Elf_External_Sym_Shndx *destshndx; |
b34976b6 | 1355 | bfd_boolean (*output_symbol_hook) |
754021d0 AM |
1356 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
1357 | struct elf_link_hash_entry *); | |
140f6c8e | 1358 | const struct elf_backend_data *bed; |
252b5132 | 1359 | |
140f6c8e AM |
1360 | bed = get_elf_backend_data (finfo->output_bfd); |
1361 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; | |
252b5132 RH |
1362 | if (output_symbol_hook != NULL) |
1363 | { | |
754021d0 | 1364 | if (! (*output_symbol_hook) (finfo->info, name, elfsym, input_sec, h)) |
b34976b6 | 1365 | return FALSE; |
252b5132 RH |
1366 | } |
1367 | ||
268b6b39 | 1368 | if (name == NULL || *name == '\0') |
252b5132 RH |
1369 | elfsym->st_name = 0; |
1370 | else if (input_sec->flags & SEC_EXCLUDE) | |
1371 | elfsym->st_name = 0; | |
1372 | else | |
1373 | { | |
1374 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
b34976b6 | 1375 | name, TRUE, FALSE); |
252b5132 | 1376 | if (elfsym->st_name == (unsigned long) -1) |
b34976b6 | 1377 | return FALSE; |
252b5132 RH |
1378 | } |
1379 | ||
1380 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
1381 | { | |
140f6c8e | 1382 | if (! elf_link_flush_output_syms (finfo, bed)) |
b34976b6 | 1383 | return FALSE; |
252b5132 RH |
1384 | } |
1385 | ||
140f6c8e | 1386 | dest = finfo->symbuf + finfo->symbuf_count * bed->s->sizeof_sym; |
9ad5cbcf AM |
1387 | destshndx = finfo->symshndxbuf; |
1388 | if (destshndx != NULL) | |
c97e73dd AM |
1389 | { |
1390 | if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size) | |
1391 | { | |
1392 | bfd_size_type amt; | |
252b5132 | 1393 | |
c97e73dd AM |
1394 | amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); |
1395 | finfo->symshndxbuf = destshndx = bfd_realloc (destshndx, amt * 2); | |
1396 | if (destshndx == NULL) | |
b34976b6 | 1397 | return FALSE; |
c97e73dd AM |
1398 | memset ((char *) destshndx + amt, 0, amt); |
1399 | finfo->shndxbuf_size *= 2; | |
1400 | } | |
1401 | destshndx += bfd_get_symcount (finfo->output_bfd); | |
1402 | } | |
1403 | ||
140f6c8e | 1404 | bed->s->swap_symbol_out (finfo->output_bfd, elfsym, dest, destshndx); |
c97e73dd AM |
1405 | finfo->symbuf_count += 1; |
1406 | bfd_get_symcount (finfo->output_bfd) += 1; | |
252b5132 | 1407 | |
b34976b6 | 1408 | return TRUE; |
252b5132 RH |
1409 | } |
1410 | ||
1411 | /* Flush the output symbols to the file. */ | |
1412 | ||
b34976b6 | 1413 | static bfd_boolean |
140f6c8e AM |
1414 | elf_link_flush_output_syms (struct elf_final_link_info *finfo, |
1415 | const struct elf_backend_data *bed) | |
252b5132 RH |
1416 | { |
1417 | if (finfo->symbuf_count > 0) | |
1418 | { | |
9ad5cbcf | 1419 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
1420 | file_ptr pos; |
1421 | bfd_size_type amt; | |
252b5132 | 1422 | |
9ad5cbcf AM |
1423 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
1424 | pos = hdr->sh_offset + hdr->sh_size; | |
140f6c8e | 1425 | amt = finfo->symbuf_count * bed->s->sizeof_sym; |
dc810e39 | 1426 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 |
268b6b39 | 1427 | || bfd_bwrite (finfo->symbuf, amt, finfo->output_bfd) != amt) |
b34976b6 | 1428 | return FALSE; |
252b5132 | 1429 | |
9ad5cbcf | 1430 | hdr->sh_size += amt; |
252b5132 RH |
1431 | finfo->symbuf_count = 0; |
1432 | } | |
1433 | ||
b34976b6 | 1434 | return TRUE; |
252b5132 RH |
1435 | } |
1436 | ||
f5d44ba0 AM |
1437 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
1438 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
71552942 L |
1439 | versioned symbol that would normally require an explicit version. |
1440 | We also handle the case that a DSO references a hidden symbol | |
1441 | which may be satisfied by a versioned symbol in another DSO. */ | |
f5d44ba0 | 1442 | |
b34976b6 | 1443 | static bfd_boolean |
268b6b39 | 1444 | elf_link_check_versioned_symbol (struct bfd_link_info *info, |
140f6c8e | 1445 | const struct elf_backend_data *bed, |
268b6b39 | 1446 | struct elf_link_hash_entry *h) |
f5d44ba0 | 1447 | { |
71552942 | 1448 | bfd *abfd; |
f5d44ba0 | 1449 | struct elf_link_loaded_list *loaded; |
f5d44ba0 | 1450 | |
0eddce27 | 1451 | if (!is_elf_hash_table (info->hash)) |
b34976b6 | 1452 | return FALSE; |
f5d44ba0 | 1453 | |
71552942 L |
1454 | switch (h->root.type) |
1455 | { | |
1456 | default: | |
1457 | abfd = NULL; | |
1458 | break; | |
1459 | ||
1460 | case bfd_link_hash_undefined: | |
1461 | case bfd_link_hash_undefweak: | |
1462 | abfd = h->root.u.undef.abfd; | |
4a43e768 AM |
1463 | if ((abfd->flags & DYNAMIC) == 0 |
1464 | || elf_dyn_lib_class (abfd) != DYN_DT_NEEDED) | |
71552942 L |
1465 | return FALSE; |
1466 | break; | |
1467 | ||
1468 | case bfd_link_hash_defined: | |
1469 | case bfd_link_hash_defweak: | |
1470 | abfd = h->root.u.def.section->owner; | |
1471 | break; | |
1472 | ||
1473 | case bfd_link_hash_common: | |
1474 | abfd = h->root.u.c.p->section->owner; | |
1475 | break; | |
1476 | } | |
1477 | BFD_ASSERT (abfd != NULL); | |
1478 | ||
f5d44ba0 AM |
1479 | for (loaded = elf_hash_table (info)->loaded; |
1480 | loaded != NULL; | |
1481 | loaded = loaded->next) | |
1482 | { | |
1483 | bfd *input; | |
1484 | Elf_Internal_Shdr *hdr; | |
1485 | bfd_size_type symcount; | |
1486 | bfd_size_type extsymcount; | |
1487 | bfd_size_type extsymoff; | |
1488 | Elf_Internal_Shdr *versymhdr; | |
6cdc0ccc AM |
1489 | Elf_Internal_Sym *isym; |
1490 | Elf_Internal_Sym *isymend; | |
1491 | Elf_Internal_Sym *isymbuf; | |
f5d44ba0 | 1492 | Elf_External_Versym *ever; |
6cdc0ccc | 1493 | Elf_External_Versym *extversym; |
f5d44ba0 AM |
1494 | |
1495 | input = loaded->abfd; | |
1496 | ||
1497 | /* We check each DSO for a possible hidden versioned definition. */ | |
71552942 | 1498 | if (input == abfd |
f5d44ba0 AM |
1499 | || (input->flags & DYNAMIC) == 0 |
1500 | || elf_dynversym (input) == 0) | |
1501 | continue; | |
1502 | ||
1503 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
1504 | ||
140f6c8e | 1505 | symcount = hdr->sh_size / bed->s->sizeof_sym; |
f5d44ba0 AM |
1506 | if (elf_bad_symtab (input)) |
1507 | { | |
1508 | extsymcount = symcount; | |
1509 | extsymoff = 0; | |
1510 | } | |
1511 | else | |
1512 | { | |
1513 | extsymcount = symcount - hdr->sh_info; | |
1514 | extsymoff = hdr->sh_info; | |
1515 | } | |
1516 | ||
1517 | if (extsymcount == 0) | |
1518 | continue; | |
1519 | ||
6cdc0ccc AM |
1520 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, |
1521 | NULL, NULL, NULL); | |
1522 | if (isymbuf == NULL) | |
b34976b6 | 1523 | return FALSE; |
f5d44ba0 | 1524 | |
f5d44ba0 AM |
1525 | /* Read in any version definitions. */ |
1526 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
268b6b39 | 1527 | extversym = bfd_malloc (versymhdr->sh_size); |
f5d44ba0 AM |
1528 | if (extversym == NULL) |
1529 | goto error_ret; | |
1530 | ||
1531 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
268b6b39 | 1532 | || (bfd_bread (extversym, versymhdr->sh_size, input) |
f5d44ba0 AM |
1533 | != versymhdr->sh_size)) |
1534 | { | |
1535 | free (extversym); | |
1536 | error_ret: | |
6cdc0ccc | 1537 | free (isymbuf); |
b34976b6 | 1538 | return FALSE; |
f5d44ba0 AM |
1539 | } |
1540 | ||
1541 | ever = extversym + extsymoff; | |
6cdc0ccc AM |
1542 | isymend = isymbuf + extsymcount; |
1543 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
f5d44ba0 AM |
1544 | { |
1545 | const char *name; | |
f5d44ba0 | 1546 | Elf_Internal_Versym iver; |
a15d9d3a | 1547 | unsigned short version_index; |
f5d44ba0 | 1548 | |
6cdc0ccc AM |
1549 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL |
1550 | || isym->st_shndx == SHN_UNDEF) | |
f5d44ba0 AM |
1551 | continue; |
1552 | ||
1553 | name = bfd_elf_string_from_elf_section (input, | |
1554 | hdr->sh_link, | |
6cdc0ccc | 1555 | isym->st_name); |
f5d44ba0 AM |
1556 | if (strcmp (name, h->root.root.string) != 0) |
1557 | continue; | |
1558 | ||
1559 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
1560 | ||
1561 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
1562 | { | |
1563 | /* If we have a non-hidden versioned sym, then it should | |
1564 | have provided a definition for the undefined sym. */ | |
1565 | abort (); | |
1566 | } | |
1567 | ||
a15d9d3a L |
1568 | version_index = iver.vs_vers & VERSYM_VERSION; |
1569 | if (version_index == 1 || version_index == 2) | |
f5d44ba0 | 1570 | { |
a15d9d3a | 1571 | /* This is the base or first version. We can use it. */ |
f5d44ba0 | 1572 | free (extversym); |
6cdc0ccc | 1573 | free (isymbuf); |
b34976b6 | 1574 | return TRUE; |
f5d44ba0 AM |
1575 | } |
1576 | } | |
1577 | ||
1578 | free (extversym); | |
6cdc0ccc | 1579 | free (isymbuf); |
f5d44ba0 AM |
1580 | } |
1581 | ||
b34976b6 | 1582 | return FALSE; |
f5d44ba0 AM |
1583 | } |
1584 | ||
252b5132 RH |
1585 | /* Add an external symbol to the symbol table. This is called from |
1586 | the hash table traversal routine. When generating a shared object, | |
1587 | we go through the symbol table twice. The first time we output | |
1588 | anything that might have been forced to local scope in a version | |
1589 | script. The second time we output the symbols that are still | |
1590 | global symbols. */ | |
1591 | ||
b34976b6 | 1592 | static bfd_boolean |
268b6b39 | 1593 | elf_link_output_extsym (struct elf_link_hash_entry *h, void *data) |
252b5132 | 1594 | { |
268b6b39 | 1595 | struct elf_outext_info *eoinfo = data; |
252b5132 | 1596 | struct elf_final_link_info *finfo = eoinfo->finfo; |
b34976b6 | 1597 | bfd_boolean strip; |
252b5132 RH |
1598 | Elf_Internal_Sym sym; |
1599 | asection *input_sec; | |
140f6c8e | 1600 | const struct elf_backend_data *bed; |
252b5132 | 1601 | |
e92d460e AM |
1602 | if (h->root.type == bfd_link_hash_warning) |
1603 | { | |
1604 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1605 | if (h->root.type == bfd_link_hash_new) | |
b34976b6 | 1606 | return TRUE; |
e92d460e AM |
1607 | } |
1608 | ||
252b5132 RH |
1609 | /* Decide whether to output this symbol in this pass. */ |
1610 | if (eoinfo->localsyms) | |
1611 | { | |
1612 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 1613 | return TRUE; |
252b5132 RH |
1614 | } |
1615 | else | |
1616 | { | |
1617 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
b34976b6 | 1618 | return TRUE; |
252b5132 RH |
1619 | } |
1620 | ||
140f6c8e AM |
1621 | bed = get_elf_backend_data (finfo->output_bfd); |
1622 | ||
560e09e9 NC |
1623 | /* If we have an undefined symbol reference here then it must have |
1624 | come from a shared library that is being linked in. (Undefined | |
1625 | references in regular files have already been handled). If we | |
1626 | are reporting errors for this situation then do so now. */ | |
1627 | if (h->root.type == bfd_link_hash_undefined | |
252b5132 | 1628 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 |
f5d44ba0 | 1629 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
140f6c8e | 1630 | && ! elf_link_check_versioned_symbol (finfo->info, bed, h) |
560e09e9 | 1631 | && finfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) |
252b5132 RH |
1632 | { |
1633 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
1634 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
560e09e9 | 1635 | NULL, 0, finfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR))) |
252b5132 | 1636 | { |
b34976b6 AM |
1637 | eoinfo->failed = TRUE; |
1638 | return FALSE; | |
252b5132 RH |
1639 | } |
1640 | } | |
1641 | ||
1b1fe8fe L |
1642 | /* We should also warn if a forced local symbol is referenced from |
1643 | shared libraries. */ | |
1049f94e | 1644 | if (! finfo->info->relocatable |
560e09e9 | 1645 | && (! finfo->info->shared) |
1b1fe8fe | 1646 | && (h->elf_link_hash_flags |
560e09e9 | 1647 | & (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_DYNAMIC_DEF | ELF_LINK_DYNAMIC_WEAK)) |
71552942 | 1648 | == (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC) |
140f6c8e | 1649 | && ! elf_link_check_versioned_symbol (finfo->info, bed, h)) |
1b1fe8fe L |
1650 | { |
1651 | (*_bfd_error_handler) | |
1652 | (_("%s: %s symbol `%s' in %s is referenced by DSO"), | |
1653 | bfd_get_filename (finfo->output_bfd), | |
1654 | ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
1655 | ? "internal" | |
1656 | : ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
1657 | ? "hidden" : "local", | |
1658 | h->root.root.string, | |
1659 | bfd_archive_filename (h->root.u.def.section->owner)); | |
1660 | eoinfo->failed = TRUE; | |
1661 | return FALSE; | |
1662 | } | |
1663 | ||
252b5132 RH |
1664 | /* We don't want to output symbols that have never been mentioned by |
1665 | a regular file, or that we have been told to strip. However, if | |
1666 | h->indx is set to -2, the symbol is used by a reloc and we must | |
1667 | output it. */ | |
1668 | if (h->indx == -2) | |
b34976b6 | 1669 | strip = FALSE; |
252b5132 RH |
1670 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
1671 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
1672 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
1673 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
b34976b6 | 1674 | strip = TRUE; |
75828352 AM |
1675 | else if (finfo->info->strip == strip_all) |
1676 | strip = TRUE; | |
1677 | else if (finfo->info->strip == strip_some | |
1678 | && bfd_hash_lookup (finfo->info->keep_hash, | |
1679 | h->root.root.string, FALSE, FALSE) == NULL) | |
1680 | strip = TRUE; | |
1681 | else if (finfo->info->strip_discarded | |
1682 | && (h->root.type == bfd_link_hash_defined | |
1683 | || h->root.type == bfd_link_hash_defweak) | |
1684 | && elf_discarded_section (h->root.u.def.section)) | |
b34976b6 | 1685 | strip = TRUE; |
252b5132 | 1686 | else |
b34976b6 | 1687 | strip = FALSE; |
252b5132 RH |
1688 | |
1689 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
2bd171e0 ILT |
1690 | nothing else to do unless it is a forced local symbol. */ |
1691 | if (strip | |
1692 | && h->dynindx == -1 | |
1693 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 1694 | return TRUE; |
252b5132 RH |
1695 | |
1696 | sym.st_value = 0; | |
1697 | sym.st_size = h->size; | |
1698 | sym.st_other = h->other; | |
1699 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
1700 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
1701 | else if (h->root.type == bfd_link_hash_undefweak | |
1702 | || h->root.type == bfd_link_hash_defweak) | |
1703 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
1704 | else | |
1705 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
1706 | ||
1707 | switch (h->root.type) | |
1708 | { | |
1709 | default: | |
1710 | case bfd_link_hash_new: | |
e92d460e | 1711 | case bfd_link_hash_warning: |
252b5132 | 1712 | abort (); |
b34976b6 | 1713 | return FALSE; |
252b5132 RH |
1714 | |
1715 | case bfd_link_hash_undefined: | |
252b5132 RH |
1716 | case bfd_link_hash_undefweak: |
1717 | input_sec = bfd_und_section_ptr; | |
1718 | sym.st_shndx = SHN_UNDEF; | |
1719 | break; | |
1720 | ||
1721 | case bfd_link_hash_defined: | |
1722 | case bfd_link_hash_defweak: | |
1723 | { | |
1724 | input_sec = h->root.u.def.section; | |
1725 | if (input_sec->output_section != NULL) | |
1726 | { | |
1727 | sym.st_shndx = | |
1728 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
1729 | input_sec->output_section); | |
9ad5cbcf | 1730 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
1731 | { |
1732 | (*_bfd_error_handler) | |
1733 | (_("%s: could not find output section %s for input section %s"), | |
1734 | bfd_get_filename (finfo->output_bfd), | |
1735 | input_sec->output_section->name, | |
1736 | input_sec->name); | |
b34976b6 AM |
1737 | eoinfo->failed = TRUE; |
1738 | return FALSE; | |
252b5132 RH |
1739 | } |
1740 | ||
1049f94e AM |
1741 | /* ELF symbols in relocatable files are section relative, |
1742 | but in nonrelocatable files they are virtual | |
252b5132 RH |
1743 | addresses. */ |
1744 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
1049f94e | 1745 | if (! finfo->info->relocatable) |
13ae64f3 JJ |
1746 | { |
1747 | sym.st_value += input_sec->output_section->vma; | |
1748 | if (h->type == STT_TLS) | |
1749 | { | |
1750 | /* STT_TLS symbols are relative to PT_TLS segment | |
1751 | base. */ | |
e1918d23 AM |
1752 | BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL); |
1753 | sym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma; | |
13ae64f3 JJ |
1754 | } |
1755 | } | |
252b5132 RH |
1756 | } |
1757 | else | |
1758 | { | |
1759 | BFD_ASSERT (input_sec->owner == NULL | |
1760 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
1761 | sym.st_shndx = SHN_UNDEF; | |
1762 | input_sec = bfd_und_section_ptr; | |
1763 | } | |
1764 | } | |
1765 | break; | |
1766 | ||
1767 | case bfd_link_hash_common: | |
1768 | input_sec = h->root.u.c.p->section; | |
1769 | sym.st_shndx = SHN_COMMON; | |
1770 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
1771 | break; | |
1772 | ||
1773 | case bfd_link_hash_indirect: | |
1774 | /* These symbols are created by symbol versioning. They point | |
c44233aa AM |
1775 | to the decorated version of the name. For example, if the |
1776 | symbol foo@@GNU_1.2 is the default, which should be used when | |
1777 | foo is used with no version, then we add an indirect symbol | |
1778 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
1779 | since the indirected symbol is already in the hash table. */ | |
b34976b6 | 1780 | return TRUE; |
252b5132 RH |
1781 | } |
1782 | ||
1783 | /* Give the processor backend a chance to tweak the symbol value, | |
1784 | and also to finish up anything that needs to be done for this | |
c44233aa AM |
1785 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for |
1786 | forced local syms when non-shared is due to a historical quirk. */ | |
252b5132 RH |
1787 | if ((h->dynindx != -1 |
1788 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
ef5aade5 L |
1789 | && ((finfo->info->shared |
1790 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1791 | || h->root.type != bfd_link_hash_undefweak)) | |
c44233aa | 1792 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
252b5132 RH |
1793 | && elf_hash_table (finfo->info)->dynamic_sections_created) |
1794 | { | |
252b5132 RH |
1795 | if (! ((*bed->elf_backend_finish_dynamic_symbol) |
1796 | (finfo->output_bfd, finfo->info, h, &sym))) | |
1797 | { | |
b34976b6 AM |
1798 | eoinfo->failed = TRUE; |
1799 | return FALSE; | |
252b5132 RH |
1800 | } |
1801 | } | |
1802 | ||
1803 | /* If we are marking the symbol as undefined, and there are no | |
1804 | non-weak references to this symbol from a regular object, then | |
91d3970e ILT |
1805 | mark the symbol as weak undefined; if there are non-weak |
1806 | references, mark the symbol as strong. We can't do this earlier, | |
252b5132 RH |
1807 | because it might not be marked as undefined until the |
1808 | finish_dynamic_symbol routine gets through with it. */ | |
1809 | if (sym.st_shndx == SHN_UNDEF | |
252b5132 | 1810 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 |
a7b97311 AM |
1811 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
1812 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
91d3970e ILT |
1813 | { |
1814 | int bindtype; | |
1815 | ||
1816 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0) | |
1817 | bindtype = STB_GLOBAL; | |
1818 | else | |
1819 | bindtype = STB_WEAK; | |
1820 | sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info)); | |
1821 | } | |
252b5132 | 1822 | |
1b1fe8fe L |
1823 | /* If a non-weak symbol with non-default visibility is not defined |
1824 | locally, it is a fatal error. */ | |
1049f94e | 1825 | if (! finfo->info->relocatable |
9c7a29a3 | 1826 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
1b1fe8fe | 1827 | && ELF_ST_BIND (sym.st_info) != STB_WEAK |
22d5e339 | 1828 | && h->root.type == bfd_link_hash_undefined |
2cd533b7 | 1829 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
1b1fe8fe L |
1830 | { |
1831 | (*_bfd_error_handler) | |
1832 | (_("%s: %s symbol `%s' isn't defined"), | |
1833 | bfd_get_filename (finfo->output_bfd), | |
1834 | ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED | |
1835 | ? "protected" | |
1836 | : ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL | |
1837 | ? "internal" : "hidden", | |
1838 | h->root.root.string); | |
1839 | eoinfo->failed = TRUE; | |
1840 | return FALSE; | |
1841 | } | |
32c092c3 | 1842 | |
252b5132 | 1843 | /* If this symbol should be put in the .dynsym section, then put it |
f5d44ba0 AM |
1844 | there now. We already know the symbol index. We also fill in |
1845 | the entry in the .hash section. */ | |
252b5132 RH |
1846 | if (h->dynindx != -1 |
1847 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
1848 | { | |
1849 | size_t bucketcount; | |
1850 | size_t bucket; | |
c7ac6ff8 | 1851 | size_t hash_entry_size; |
252b5132 RH |
1852 | bfd_byte *bucketpos; |
1853 | bfd_vma chain; | |
140f6c8e | 1854 | bfd_byte *esym; |
252b5132 RH |
1855 | |
1856 | sym.st_name = h->dynstr_index; | |
140f6c8e AM |
1857 | esym = finfo->dynsym_sec->contents + h->dynindx * bed->s->sizeof_sym; |
1858 | bed->s->swap_symbol_out (finfo->output_bfd, &sym, esym, 0); | |
252b5132 RH |
1859 | |
1860 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
1861 | bucket = h->elf_hash_value % bucketcount; | |
3e932841 | 1862 | hash_entry_size |
c7ac6ff8 | 1863 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; |
252b5132 | 1864 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
c7ac6ff8 MM |
1865 | + (bucket + 2) * hash_entry_size); |
1866 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
268b6b39 | 1867 | bfd_put (8 * hash_entry_size, finfo->output_bfd, h->dynindx, bucketpos); |
c7ac6ff8 MM |
1868 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, |
1869 | ((bfd_byte *) finfo->hash_sec->contents | |
1870 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
252b5132 RH |
1871 | |
1872 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
1873 | { | |
1874 | Elf_Internal_Versym iversym; | |
dc810e39 | 1875 | Elf_External_Versym *eversym; |
252b5132 RH |
1876 | |
1877 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1878 | { | |
1879 | if (h->verinfo.verdef == NULL) | |
1880 | iversym.vs_vers = 0; | |
1881 | else | |
1882 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
1883 | } | |
1884 | else | |
1885 | { | |
1886 | if (h->verinfo.vertree == NULL) | |
1887 | iversym.vs_vers = 1; | |
1888 | else | |
1889 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
1890 | } | |
1891 | ||
1892 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
1893 | iversym.vs_vers |= VERSYM_HIDDEN; | |
1894 | ||
dc810e39 AM |
1895 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; |
1896 | eversym += h->dynindx; | |
1897 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
252b5132 RH |
1898 | } |
1899 | } | |
1900 | ||
1901 | /* If we're stripping it, then it was just a dynamic symbol, and | |
1902 | there's nothing else to do. */ | |
7330fb86 | 1903 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) |
b34976b6 | 1904 | return TRUE; |
252b5132 RH |
1905 | |
1906 | h->indx = bfd_get_symcount (finfo->output_bfd); | |
1907 | ||
754021d0 | 1908 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec, h)) |
252b5132 | 1909 | { |
b34976b6 AM |
1910 | eoinfo->failed = TRUE; |
1911 | return FALSE; | |
252b5132 RH |
1912 | } |
1913 | ||
b34976b6 | 1914 | return TRUE; |
252b5132 RH |
1915 | } |
1916 | ||
1917 | /* Link an input file into the linker output file. This function | |
1918 | handles all the sections and relocations of the input file at once. | |
1919 | This is so that we only have to read the local symbols once, and | |
1920 | don't have to keep them in memory. */ | |
1921 | ||
b34976b6 | 1922 | static bfd_boolean |
268b6b39 | 1923 | elf_link_input_bfd (struct elf_final_link_info *finfo, bfd *input_bfd) |
252b5132 | 1924 | { |
b34976b6 | 1925 | bfd_boolean (*relocate_section) |
268b6b39 AM |
1926 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
1927 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
252b5132 RH |
1928 | bfd *output_bfd; |
1929 | Elf_Internal_Shdr *symtab_hdr; | |
1930 | size_t locsymcount; | |
1931 | size_t extsymoff; | |
6cdc0ccc | 1932 | Elf_Internal_Sym *isymbuf; |
252b5132 | 1933 | Elf_Internal_Sym *isym; |
6cdc0ccc | 1934 | Elf_Internal_Sym *isymend; |
252b5132 RH |
1935 | long *pindex; |
1936 | asection **ppsection; | |
1937 | asection *o; | |
9c5bfbb7 | 1938 | const struct elf_backend_data *bed; |
b34976b6 | 1939 | bfd_boolean emit_relocs; |
f8deed93 | 1940 | struct elf_link_hash_entry **sym_hashes; |
252b5132 RH |
1941 | |
1942 | output_bfd = finfo->output_bfd; | |
c7ac6ff8 MM |
1943 | bed = get_elf_backend_data (output_bfd); |
1944 | relocate_section = bed->elf_backend_relocate_section; | |
252b5132 RH |
1945 | |
1946 | /* If this is a dynamic object, we don't want to do anything here: | |
1947 | we don't want the local symbols, and we don't want the section | |
1948 | contents. */ | |
1949 | if ((input_bfd->flags & DYNAMIC) != 0) | |
b34976b6 | 1950 | return TRUE; |
252b5132 | 1951 | |
1049f94e | 1952 | emit_relocs = (finfo->info->relocatable |
c44233aa AM |
1953 | || finfo->info->emitrelocations |
1954 | || bed->elf_backend_emit_relocs); | |
9317eacc | 1955 | |
252b5132 RH |
1956 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1957 | if (elf_bad_symtab (input_bfd)) | |
1958 | { | |
140f6c8e | 1959 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; |
252b5132 RH |
1960 | extsymoff = 0; |
1961 | } | |
1962 | else | |
1963 | { | |
1964 | locsymcount = symtab_hdr->sh_info; | |
1965 | extsymoff = symtab_hdr->sh_info; | |
1966 | } | |
1967 | ||
1968 | /* Read the local symbols. */ | |
6cdc0ccc AM |
1969 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
1970 | if (isymbuf == NULL && locsymcount != 0) | |
1971 | { | |
1972 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
1973 | finfo->internal_syms, | |
1974 | finfo->external_syms, | |
1975 | finfo->locsym_shndx); | |
1976 | if (isymbuf == NULL) | |
b34976b6 | 1977 | return FALSE; |
252b5132 RH |
1978 | } |
1979 | ||
6cdc0ccc AM |
1980 | /* Find local symbol sections and adjust values of symbols in |
1981 | SEC_MERGE sections. Write out those local symbols we know are | |
1982 | going into the output file. */ | |
1983 | isymend = isymbuf + locsymcount; | |
1984 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
1985 | isym < isymend; | |
1986 | isym++, pindex++, ppsection++) | |
252b5132 RH |
1987 | { |
1988 | asection *isec; | |
1989 | const char *name; | |
1990 | Elf_Internal_Sym osym; | |
1991 | ||
252b5132 RH |
1992 | *pindex = -1; |
1993 | ||
1994 | if (elf_bad_symtab (input_bfd)) | |
1995 | { | |
1996 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
1997 | { | |
1998 | *ppsection = NULL; | |
1999 | continue; | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | if (isym->st_shndx == SHN_UNDEF) | |
862517b6 | 2004 | isec = bfd_und_section_ptr; |
9ad5cbcf AM |
2005 | else if (isym->st_shndx < SHN_LORESERVE |
2006 | || isym->st_shndx > SHN_HIRESERVE) | |
f5fa8ca2 | 2007 | { |
140f6c8e | 2008 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
65765700 | 2009 | if (isec |
68bfbfcc | 2010 | && isec->sec_info_type == ELF_INFO_TYPE_MERGE |
f5fa8ca2 JJ |
2011 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
2012 | isym->st_value = | |
2013 | _bfd_merged_section_offset (output_bfd, &isec, | |
65765700 | 2014 | elf_section_data (isec)->sec_info, |
268b6b39 | 2015 | isym->st_value, 0); |
f5fa8ca2 | 2016 | } |
252b5132 | 2017 | else if (isym->st_shndx == SHN_ABS) |
862517b6 | 2018 | isec = bfd_abs_section_ptr; |
252b5132 | 2019 | else if (isym->st_shndx == SHN_COMMON) |
862517b6 | 2020 | isec = bfd_com_section_ptr; |
252b5132 RH |
2021 | else |
2022 | { | |
2023 | /* Who knows? */ | |
2024 | isec = NULL; | |
2025 | } | |
2026 | ||
2027 | *ppsection = isec; | |
2028 | ||
2029 | /* Don't output the first, undefined, symbol. */ | |
6cdc0ccc | 2030 | if (ppsection == finfo->sections) |
252b5132 RH |
2031 | continue; |
2032 | ||
24376d1b AM |
2033 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
2034 | { | |
24376d1b AM |
2035 | /* We never output section symbols. Instead, we use the |
2036 | section symbol of the corresponding section in the output | |
2037 | file. */ | |
2038 | continue; | |
2039 | } | |
2040 | ||
252b5132 RH |
2041 | /* If we are stripping all symbols, we don't want to output this |
2042 | one. */ | |
2043 | if (finfo->info->strip == strip_all) | |
2044 | continue; | |
2045 | ||
252b5132 | 2046 | /* If we are discarding all local symbols, we don't want to |
1049f94e | 2047 | output this one. If we are generating a relocatable output |
252b5132 RH |
2048 | file, then some of the local symbols may be required by |
2049 | relocs; we output them below as we discover that they are | |
2050 | needed. */ | |
2051 | if (finfo->info->discard == discard_all) | |
2052 | continue; | |
2053 | ||
2054 | /* If this symbol is defined in a section which we are | |
c44233aa AM |
2055 | discarding, we don't need to keep it, but note that |
2056 | linker_mark is only reliable for sections that have contents. | |
2057 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
2058 | as well as linker_mark. */ | |
9ad5cbcf | 2059 | if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 RH |
2060 | && isec != NULL |
2061 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) | |
1049f94e | 2062 | || (! finfo->info->relocatable |
252b5132 RH |
2063 | && (isec->flags & SEC_EXCLUDE) != 0))) |
2064 | continue; | |
2065 | ||
2066 | /* Get the name of the symbol. */ | |
2067 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
2068 | isym->st_name); | |
2069 | if (name == NULL) | |
b34976b6 | 2070 | return FALSE; |
252b5132 RH |
2071 | |
2072 | /* See if we are discarding symbols with this name. */ | |
2073 | if ((finfo->info->strip == strip_some | |
b34976b6 | 2074 | && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) |
252b5132 | 2075 | == NULL)) |
f5fa8ca2 | 2076 | || (((finfo->info->discard == discard_sec_merge |
1049f94e | 2077 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocatable) |
f5fa8ca2 | 2078 | || finfo->info->discard == discard_l) |
252b5132 RH |
2079 | && bfd_is_local_label_name (input_bfd, name))) |
2080 | continue; | |
2081 | ||
2082 | /* If we get here, we are going to output this symbol. */ | |
2083 | ||
2084 | osym = *isym; | |
2085 | ||
2086 | /* Adjust the section index for the output file. */ | |
2087 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
2088 | isec->output_section); | |
9ad5cbcf | 2089 | if (osym.st_shndx == SHN_BAD) |
b34976b6 | 2090 | return FALSE; |
252b5132 RH |
2091 | |
2092 | *pindex = bfd_get_symcount (output_bfd); | |
2093 | ||
1049f94e | 2094 | /* ELF symbols in relocatable files are section relative, but |
252b5132 RH |
2095 | in executable files they are virtual addresses. Note that |
2096 | this code assumes that all ELF sections have an associated | |
2097 | BFD section with a reasonable value for output_offset; below | |
2098 | we assume that they also have a reasonable value for | |
2099 | output_section. Any special sections must be set up to meet | |
2100 | these requirements. */ | |
2101 | osym.st_value += isec->output_offset; | |
1049f94e | 2102 | if (! finfo->info->relocatable) |
13ae64f3 JJ |
2103 | { |
2104 | osym.st_value += isec->output_section->vma; | |
2105 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
2106 | { | |
2107 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
e1918d23 AM |
2108 | BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL); |
2109 | osym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma; | |
13ae64f3 JJ |
2110 | } |
2111 | } | |
252b5132 | 2112 | |
754021d0 | 2113 | if (! elf_link_output_sym (finfo, name, &osym, isec, NULL)) |
b34976b6 | 2114 | return FALSE; |
252b5132 RH |
2115 | } |
2116 | ||
2117 | /* Relocate the contents of each section. */ | |
f8deed93 | 2118 | sym_hashes = elf_sym_hashes (input_bfd); |
252b5132 RH |
2119 | for (o = input_bfd->sections; o != NULL; o = o->next) |
2120 | { | |
2121 | bfd_byte *contents; | |
2122 | ||
2123 | if (! o->linker_mark) | |
2124 | { | |
2125 | /* This section was omitted from the link. */ | |
2126 | continue; | |
2127 | } | |
2128 | ||
2129 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
2130 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
2131 | continue; | |
2132 | ||
2133 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
2134 | { | |
45d6a902 | 2135 | /* Section was created by _bfd_elf_link_create_dynamic_sections |
252b5132 RH |
2136 | or somesuch. */ |
2137 | continue; | |
2138 | } | |
2139 | ||
2140 | /* Get the contents of the section. They have been cached by a | |
c44233aa AM |
2141 | relaxation routine. Note that o is a section in an input |
2142 | file, so the contents field will not have been set by any of | |
2143 | the routines which work on output files. */ | |
252b5132 RH |
2144 | if (elf_section_data (o)->this_hdr.contents != NULL) |
2145 | contents = elf_section_data (o)->this_hdr.contents; | |
2146 | else | |
2147 | { | |
2148 | contents = finfo->contents; | |
268b6b39 AM |
2149 | if (! bfd_get_section_contents (input_bfd, o, contents, 0, |
2150 | o->_raw_size)) | |
b34976b6 | 2151 | return FALSE; |
252b5132 RH |
2152 | } |
2153 | ||
2154 | if ((o->flags & SEC_RELOC) != 0) | |
2155 | { | |
2156 | Elf_Internal_Rela *internal_relocs; | |
140f6c8e AM |
2157 | bfd_vma r_type_mask; |
2158 | int r_sym_shift; | |
252b5132 RH |
2159 | |
2160 | /* Get the swapped relocs. */ | |
45d6a902 AM |
2161 | internal_relocs |
2162 | = _bfd_elf_link_read_relocs (input_bfd, o, finfo->external_relocs, | |
2163 | finfo->internal_relocs, FALSE); | |
252b5132 RH |
2164 | if (internal_relocs == NULL |
2165 | && o->reloc_count > 0) | |
b34976b6 | 2166 | return FALSE; |
252b5132 | 2167 | |
140f6c8e AM |
2168 | if (bed->s->arch_size == 32) |
2169 | { | |
2170 | r_type_mask = 0xff; | |
2171 | r_sym_shift = 8; | |
2172 | } | |
2173 | else | |
2174 | { | |
2175 | r_type_mask = 0xffffffff; | |
2176 | r_sym_shift = 32; | |
2177 | } | |
2178 | ||
ec338859 AM |
2179 | /* Run through the relocs looking for any against symbols |
2180 | from discarded sections and section symbols from | |
2181 | removed link-once sections. Complain about relocs | |
2182 | against discarded sections. Zero relocs against removed | |
f97b9cb8 L |
2183 | link-once sections. Preserve debug information as much |
2184 | as we can. */ | |
2185 | if (!elf_section_ignore_discarded_relocs (o)) | |
ec338859 AM |
2186 | { |
2187 | Elf_Internal_Rela *rel, *relend; | |
50b4d486 | 2188 | |
ec338859 AM |
2189 | rel = internal_relocs; |
2190 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
2191 | for ( ; rel < relend; rel++) | |
2192 | { | |
140f6c8e | 2193 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
f97b9cb8 | 2194 | asection *sec; |
ec338859 AM |
2195 | |
2196 | if (r_symndx >= locsymcount | |
2197 | || (elf_bad_symtab (input_bfd) | |
2198 | && finfo->sections[r_symndx] == NULL)) | |
2199 | { | |
2200 | struct elf_link_hash_entry *h; | |
2201 | ||
2202 | h = sym_hashes[r_symndx - extsymoff]; | |
2203 | while (h->root.type == bfd_link_hash_indirect | |
2204 | || h->root.type == bfd_link_hash_warning) | |
2205 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2206 | ||
2207 | /* Complain if the definition comes from a | |
2208 | discarded section. */ | |
f97b9cb8 | 2209 | sec = h->root.u.def.section; |
ec338859 AM |
2210 | if ((h->root.type == bfd_link_hash_defined |
2211 | || h->root.type == bfd_link_hash_defweak) | |
f97b9cb8 | 2212 | && elf_discarded_section (sec)) |
ec338859 | 2213 | { |
ec338859 AM |
2214 | if ((o->flags & SEC_DEBUGGING) != 0) |
2215 | { | |
45e9217a | 2216 | BFD_ASSERT (r_symndx != 0); |
f97b9cb8 L |
2217 | /* Try to preserve debug information. */ |
2218 | if ((o->flags & SEC_DEBUGGING) != 0 | |
2219 | && sec->kept_section != NULL | |
6e35c4da | 2220 | && sec->_raw_size == sec->kept_section->_raw_size) |
f97b9cb8 L |
2221 | h->root.u.def.section |
2222 | = sec->kept_section; | |
2223 | else | |
2224 | memset (rel, 0, sizeof (*rel)); | |
ec338859 AM |
2225 | } |
2226 | else | |
6f6f27f8 L |
2227 | finfo->info->callbacks->error_handler |
2228 | (LD_DEFINITION_IN_DISCARDED_SECTION, | |
2229 | _("%T: discarded in section `%s' from %s\n"), | |
2230 | h->root.root.string, | |
2231 | h->root.root.string, | |
2232 | h->root.u.def.section->name, | |
2233 | bfd_archive_filename (h->root.u.def.section->owner)); | |
ec338859 AM |
2234 | } |
2235 | } | |
2236 | else | |
2237 | { | |
f97b9cb8 | 2238 | sec = finfo->sections[r_symndx]; |
50b4d486 | 2239 | |
ed4de5e2 | 2240 | if (sec != NULL && elf_discarded_section (sec)) |
f9f32305 | 2241 | { |
ad43ed4c L |
2242 | if ((o->flags & SEC_DEBUGGING) != 0 |
2243 | || (sec->flags & SEC_LINK_ONCE) != 0) | |
f9f32305 | 2244 | { |
45e9217a | 2245 | BFD_ASSERT (r_symndx != 0); |
f97b9cb8 L |
2246 | /* Try to preserve debug information. */ |
2247 | if ((o->flags & SEC_DEBUGGING) != 0 | |
2248 | && sec->kept_section != NULL | |
6e35c4da | 2249 | && sec->_raw_size == sec->kept_section->_raw_size) |
f97b9cb8 L |
2250 | finfo->sections[r_symndx] |
2251 | = sec->kept_section; | |
2252 | else | |
2253 | { | |
140f6c8e | 2254 | rel->r_info &= r_type_mask; |
f97b9cb8 L |
2255 | rel->r_addend = 0; |
2256 | } | |
f9f32305 AM |
2257 | } |
2258 | else | |
f9f32305 | 2259 | { |
6f6f27f8 L |
2260 | static int count; |
2261 | int ok; | |
2262 | char *buf; | |
2263 | ||
2264 | ok = asprintf (&buf, "local symbol %d", | |
2265 | count++); | |
2266 | if (ok <= 0) | |
2267 | buf = (char *) "local symbol"; | |
2268 | finfo->info->callbacks->error_handler | |
2269 | (LD_DEFINITION_IN_DISCARDED_SECTION, | |
2270 | _("%T: discarded in section `%s' from %s\n"), | |
2271 | buf, buf, sec->name, | |
2272 | bfd_archive_filename (input_bfd)); | |
2273 | if (ok != -1) | |
f9f32305 | 2274 | free (buf); |
ec338859 AM |
2275 | } |
2276 | } | |
2277 | } | |
2278 | } | |
2279 | } | |
50b4d486 | 2280 | |
252b5132 RH |
2281 | /* Relocate the section by invoking a back end routine. |
2282 | ||
2283 | The back end routine is responsible for adjusting the | |
2284 | section contents as necessary, and (if using Rela relocs | |
1049f94e | 2285 | and generating a relocatable output file) adjusting the |
252b5132 RH |
2286 | reloc addend as necessary. |
2287 | ||
2288 | The back end routine does not have to worry about setting | |
2289 | the reloc address or the reloc symbol index. | |
2290 | ||
2291 | The back end routine is given a pointer to the swapped in | |
2292 | internal symbols, and can access the hash table entries | |
2293 | for the external symbols via elf_sym_hashes (input_bfd). | |
2294 | ||
1049f94e | 2295 | When generating relocatable output, the back end routine |
252b5132 RH |
2296 | must handle STB_LOCAL/STT_SECTION symbols specially. The |
2297 | output symbol is going to be a section symbol | |
2298 | corresponding to the output section, which will require | |
2299 | the addend to be adjusted. */ | |
2300 | ||
2301 | if (! (*relocate_section) (output_bfd, finfo->info, | |
2302 | input_bfd, o, contents, | |
2303 | internal_relocs, | |
6cdc0ccc | 2304 | isymbuf, |
252b5132 | 2305 | finfo->sections)) |
b34976b6 | 2306 | return FALSE; |
252b5132 | 2307 | |
9317eacc | 2308 | if (emit_relocs) |
252b5132 RH |
2309 | { |
2310 | Elf_Internal_Rela *irela; | |
2311 | Elf_Internal_Rela *irelaend; | |
73722af0 | 2312 | bfd_vma last_offset; |
252b5132 | 2313 | struct elf_link_hash_entry **rel_hash; |
c89583f8 | 2314 | Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2; |
4e8a9624 | 2315 | unsigned int next_erel; |
b34976b6 | 2316 | bfd_boolean (*reloc_emitter) |
268b6b39 | 2317 | (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *); |
b34976b6 | 2318 | bfd_boolean rela_normal; |
b491616a AM |
2319 | |
2320 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
2321 | rela_normal = (bed->rela_normal | |
2322 | && (input_rel_hdr->sh_entsize | |
140f6c8e | 2323 | == bed->s->sizeof_rela)); |
252b5132 RH |
2324 | |
2325 | /* Adjust the reloc addresses and symbol indices. */ | |
2326 | ||
2327 | irela = internal_relocs; | |
dc810e39 | 2328 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 2329 | rel_hash = (elf_section_data (o->output_section)->rel_hashes |
31367b81 MM |
2330 | + elf_section_data (o->output_section)->rel_count |
2331 | + elf_section_data (o->output_section)->rel_count2); | |
73722af0 | 2332 | last_offset = o->output_offset; |
1049f94e | 2333 | if (!finfo->info->relocatable) |
73722af0 | 2334 | last_offset += o->output_section->vma; |
209f668e | 2335 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) |
252b5132 RH |
2336 | { |
2337 | unsigned long r_symndx; | |
252b5132 | 2338 | asection *sec; |
fad2542d | 2339 | Elf_Internal_Sym sym; |
252b5132 | 2340 | |
209f668e NC |
2341 | if (next_erel == bed->s->int_rels_per_ext_rel) |
2342 | { | |
2343 | rel_hash++; | |
2344 | next_erel = 0; | |
2345 | } | |
2346 | ||
d6fe2dc1 AM |
2347 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
2348 | finfo->info, o, | |
2349 | irela->r_offset); | |
2350 | if (irela->r_offset >= (bfd_vma) -2) | |
2351 | { | |
73722af0 AM |
2352 | /* This is a reloc for a deleted entry or somesuch. |
2353 | Turn it into an R_*_NONE reloc, at the same | |
2354 | offset as the last reloc. elf_eh_frame.c and | |
2355 | elf_bfd_discard_info rely on reloc offsets | |
b34976b6 | 2356 | being ordered. */ |
73722af0 AM |
2357 | irela->r_offset = last_offset; |
2358 | irela->r_info = 0; | |
2359 | irela->r_addend = 0; | |
d6fe2dc1 AM |
2360 | continue; |
2361 | } | |
2362 | ||
252b5132 RH |
2363 | irela->r_offset += o->output_offset; |
2364 | ||
7ad34365 | 2365 | /* Relocs in an executable have to be virtual addresses. */ |
1049f94e | 2366 | if (!finfo->info->relocatable) |
7ad34365 NC |
2367 | irela->r_offset += o->output_section->vma; |
2368 | ||
73722af0 | 2369 | last_offset = irela->r_offset; |
252b5132 | 2370 | |
140f6c8e | 2371 | r_symndx = irela->r_info >> r_sym_shift; |
73722af0 | 2372 | if (r_symndx == STN_UNDEF) |
252b5132 RH |
2373 | continue; |
2374 | ||
2375 | if (r_symndx >= locsymcount | |
2376 | || (elf_bad_symtab (input_bfd) | |
2377 | && finfo->sections[r_symndx] == NULL)) | |
2378 | { | |
2379 | struct elf_link_hash_entry *rh; | |
209f668e | 2380 | unsigned long indx; |
252b5132 RH |
2381 | |
2382 | /* This is a reloc against a global symbol. We | |
2383 | have not yet output all the local symbols, so | |
2384 | we do not know the symbol index of any global | |
2385 | symbol. We set the rel_hash entry for this | |
2386 | reloc to point to the global hash table entry | |
2387 | for this symbol. The symbol index is then | |
2388 | set at the end of elf_bfd_final_link. */ | |
2389 | indx = r_symndx - extsymoff; | |
2390 | rh = elf_sym_hashes (input_bfd)[indx]; | |
2391 | while (rh->root.type == bfd_link_hash_indirect | |
2392 | || rh->root.type == bfd_link_hash_warning) | |
2393 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
2394 | ||
2395 | /* Setting the index to -2 tells | |
2396 | elf_link_output_extsym that this symbol is | |
2397 | used by a reloc. */ | |
2398 | BFD_ASSERT (rh->indx < 0); | |
2399 | rh->indx = -2; | |
2400 | ||
2401 | *rel_hash = rh; | |
2402 | ||
2403 | continue; | |
2404 | } | |
2405 | ||
3e932841 | 2406 | /* This is a reloc against a local symbol. */ |
252b5132 RH |
2407 | |
2408 | *rel_hash = NULL; | |
fad2542d | 2409 | sym = isymbuf[r_symndx]; |
252b5132 | 2410 | sec = finfo->sections[r_symndx]; |
fad2542d | 2411 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
252b5132 RH |
2412 | { |
2413 | /* I suppose the backend ought to fill in the | |
2414 | section of any STT_SECTION symbol against a | |
2415 | processor specific section. If we have | |
2416 | discarded a section, the output_section will | |
2417 | be the absolute section. */ | |
b491616a AM |
2418 | if (bfd_is_abs_section (sec) |
2419 | || (sec != NULL | |
2420 | && bfd_is_abs_section (sec->output_section))) | |
252b5132 RH |
2421 | r_symndx = 0; |
2422 | else if (sec == NULL || sec->owner == NULL) | |
2423 | { | |
2424 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2425 | return FALSE; |
252b5132 RH |
2426 | } |
2427 | else | |
2428 | { | |
2429 | r_symndx = sec->output_section->target_index; | |
2430 | BFD_ASSERT (r_symndx != 0); | |
2431 | } | |
b491616a AM |
2432 | |
2433 | /* Adjust the addend according to where the | |
f5d44ba0 | 2434 | section winds up in the output section. */ |
b491616a AM |
2435 | if (rela_normal) |
2436 | irela->r_addend += sec->output_offset; | |
252b5132 RH |
2437 | } |
2438 | else | |
2439 | { | |
2440 | if (finfo->indices[r_symndx] == -1) | |
2441 | { | |
dc810e39 | 2442 | unsigned long shlink; |
252b5132 RH |
2443 | const char *name; |
2444 | asection *osec; | |
2445 | ||
2446 | if (finfo->info->strip == strip_all) | |
2447 | { | |
2448 | /* You can't do ld -r -s. */ | |
2449 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 2450 | return FALSE; |
252b5132 RH |
2451 | } |
2452 | ||
2453 | /* This symbol was skipped earlier, but | |
2454 | since it is needed by a reloc, we | |
2455 | must output it now. */ | |
dc810e39 | 2456 | shlink = symtab_hdr->sh_link; |
a7b97311 | 2457 | name = (bfd_elf_string_from_elf_section |
fad2542d | 2458 | (input_bfd, shlink, sym.st_name)); |
252b5132 | 2459 | if (name == NULL) |
b34976b6 | 2460 | return FALSE; |
252b5132 RH |
2461 | |
2462 | osec = sec->output_section; | |
fad2542d | 2463 | sym.st_shndx = |
252b5132 RH |
2464 | _bfd_elf_section_from_bfd_section (output_bfd, |
2465 | osec); | |
fad2542d | 2466 | if (sym.st_shndx == SHN_BAD) |
b34976b6 | 2467 | return FALSE; |
252b5132 | 2468 | |
fad2542d | 2469 | sym.st_value += sec->output_offset; |
1049f94e | 2470 | if (! finfo->info->relocatable) |
13ae64f3 | 2471 | { |
fad2542d AM |
2472 | sym.st_value += osec->vma; |
2473 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
13ae64f3 JJ |
2474 | { |
2475 | /* STT_TLS symbols are relative to PT_TLS | |
2476 | segment base. */ | |
e1918d23 AM |
2477 | BFD_ASSERT (elf_hash_table (finfo->info) |
2478 | ->tls_sec != NULL); | |
2479 | sym.st_value -= (elf_hash_table (finfo->info) | |
2480 | ->tls_sec->vma); | |
13ae64f3 JJ |
2481 | } |
2482 | } | |
252b5132 | 2483 | |
a7b97311 AM |
2484 | finfo->indices[r_symndx] |
2485 | = bfd_get_symcount (output_bfd); | |
252b5132 | 2486 | |
754021d0 AM |
2487 | if (! elf_link_output_sym (finfo, name, &sym, sec, |
2488 | NULL)) | |
b34976b6 | 2489 | return FALSE; |
252b5132 RH |
2490 | } |
2491 | ||
2492 | r_symndx = finfo->indices[r_symndx]; | |
2493 | } | |
2494 | ||
140f6c8e AM |
2495 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift |
2496 | | (irela->r_info & r_type_mask)); | |
252b5132 RH |
2497 | } |
2498 | ||
2499 | /* Swap out the relocs. */ | |
c44233aa | 2500 | if (bed->elf_backend_emit_relocs |
1049f94e | 2501 | && !(finfo->info->relocatable |
a7b97311 | 2502 | || finfo->info->emitrelocations)) |
c44233aa AM |
2503 | reloc_emitter = bed->elf_backend_emit_relocs; |
2504 | else | |
45d6a902 | 2505 | reloc_emitter = _bfd_elf_link_output_relocs; |
9317eacc | 2506 | |
c89583f8 AM |
2507 | if (input_rel_hdr->sh_size != 0 |
2508 | && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr, | |
2509 | internal_relocs)) | |
b34976b6 | 2510 | return FALSE; |
9317eacc | 2511 | |
c89583f8 AM |
2512 | input_rel_hdr2 = elf_section_data (o)->rel_hdr2; |
2513 | if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0) | |
c44233aa AM |
2514 | { |
2515 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) | |
dc810e39 | 2516 | * bed->s->int_rels_per_ext_rel); |
c89583f8 | 2517 | if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2, |
41241523 | 2518 | internal_relocs)) |
b34976b6 | 2519 | return FALSE; |
c44233aa | 2520 | } |
252b5132 RH |
2521 | } |
2522 | } | |
2523 | ||
2524 | /* Write out the modified section contents. */ | |
73d074b4 | 2525 | if (bed->elf_backend_write_section |
f9f32305 | 2526 | && (*bed->elf_backend_write_section) (output_bfd, o, contents)) |
73d074b4 DJ |
2527 | { |
2528 | /* Section written out. */ | |
2529 | } | |
68bfbfcc | 2530 | else switch (o->sec_info_type) |
f5fa8ca2 | 2531 | { |
65765700 | 2532 | case ELF_INFO_TYPE_STABS: |
f5fa8ca2 | 2533 | if (! (_bfd_write_section_stabs |
65765700 JJ |
2534 | (output_bfd, |
2535 | &elf_hash_table (finfo->info)->stab_info, | |
2536 | o, &elf_section_data (o)->sec_info, contents))) | |
b34976b6 | 2537 | return FALSE; |
65765700 JJ |
2538 | break; |
2539 | case ELF_INFO_TYPE_MERGE: | |
126495ed AM |
2540 | if (! _bfd_write_merged_section (output_bfd, o, |
2541 | elf_section_data (o)->sec_info)) | |
b34976b6 | 2542 | return FALSE; |
65765700 JJ |
2543 | break; |
2544 | case ELF_INFO_TYPE_EH_FRAME: | |
2545 | { | |
126495ed AM |
2546 | if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info, |
2547 | o, contents)) | |
b34976b6 | 2548 | return FALSE; |
65765700 JJ |
2549 | } |
2550 | break; | |
2551 | default: | |
2552 | { | |
2553 | bfd_size_type sec_size; | |
2554 | ||
2555 | sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size); | |
2556 | if (! (o->flags & SEC_EXCLUDE) | |
2557 | && ! bfd_set_section_contents (output_bfd, o->output_section, | |
2558 | contents, | |
2559 | (file_ptr) o->output_offset, | |
2560 | sec_size)) | |
b34976b6 | 2561 | return FALSE; |
65765700 JJ |
2562 | } |
2563 | break; | |
252b5132 RH |
2564 | } |
2565 | } | |
2566 | ||
b34976b6 | 2567 | return TRUE; |
252b5132 RH |
2568 | } |
2569 | ||
2570 | /* Generate a reloc when linking an ELF file. This is a reloc | |
2571 | requested by the linker, and does come from any input file. This | |
2572 | is used to build constructor and destructor tables when linking | |
2573 | with -Ur. */ | |
2574 | ||
b34976b6 | 2575 | static bfd_boolean |
268b6b39 AM |
2576 | elf_reloc_link_order (bfd *output_bfd, |
2577 | struct bfd_link_info *info, | |
2578 | asection *output_section, | |
2579 | struct bfd_link_order *link_order) | |
252b5132 RH |
2580 | { |
2581 | reloc_howto_type *howto; | |
2582 | long indx; | |
2583 | bfd_vma offset; | |
2584 | bfd_vma addend; | |
2585 | struct elf_link_hash_entry **rel_hash_ptr; | |
2586 | Elf_Internal_Shdr *rel_hdr; | |
9c5bfbb7 | 2587 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
947216bf AM |
2588 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; |
2589 | bfd_byte *erel; | |
2590 | unsigned int i; | |
252b5132 RH |
2591 | |
2592 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
2593 | if (howto == NULL) | |
2594 | { | |
2595 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2596 | return FALSE; |
252b5132 RH |
2597 | } |
2598 | ||
2599 | addend = link_order->u.reloc.p->addend; | |
2600 | ||
2601 | /* Figure out the symbol index. */ | |
2602 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
31367b81 MM |
2603 | + elf_section_data (output_section)->rel_count |
2604 | + elf_section_data (output_section)->rel_count2); | |
252b5132 RH |
2605 | if (link_order->type == bfd_section_reloc_link_order) |
2606 | { | |
2607 | indx = link_order->u.reloc.p->u.section->target_index; | |
2608 | BFD_ASSERT (indx != 0); | |
2609 | *rel_hash_ptr = NULL; | |
2610 | } | |
2611 | else | |
2612 | { | |
2613 | struct elf_link_hash_entry *h; | |
2614 | ||
2615 | /* Treat a reloc against a defined symbol as though it were | |
c44233aa | 2616 | actually against the section. */ |
252b5132 RH |
2617 | h = ((struct elf_link_hash_entry *) |
2618 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
2619 | link_order->u.reloc.p->u.name, | |
b34976b6 | 2620 | FALSE, FALSE, TRUE)); |
252b5132 RH |
2621 | if (h != NULL |
2622 | && (h->root.type == bfd_link_hash_defined | |
2623 | || h->root.type == bfd_link_hash_defweak)) | |
2624 | { | |
2625 | asection *section; | |
2626 | ||
2627 | section = h->root.u.def.section; | |
2628 | indx = section->output_section->target_index; | |
2629 | *rel_hash_ptr = NULL; | |
2630 | /* It seems that we ought to add the symbol value to the | |
c44233aa AM |
2631 | addend here, but in practice it has already been added |
2632 | because it was passed to constructor_callback. */ | |
252b5132 RH |
2633 | addend += section->output_section->vma + section->output_offset; |
2634 | } | |
2635 | else if (h != NULL) | |
2636 | { | |
2637 | /* Setting the index to -2 tells elf_link_output_extsym that | |
2638 | this symbol is used by a reloc. */ | |
2639 | h->indx = -2; | |
2640 | *rel_hash_ptr = h; | |
2641 | indx = 0; | |
2642 | } | |
2643 | else | |
2644 | { | |
2645 | if (! ((*info->callbacks->unattached_reloc) | |
268b6b39 | 2646 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) |
b34976b6 | 2647 | return FALSE; |
252b5132 RH |
2648 | indx = 0; |
2649 | } | |
2650 | } | |
2651 | ||
2652 | /* If this is an inplace reloc, we must write the addend into the | |
2653 | object file. */ | |
2654 | if (howto->partial_inplace && addend != 0) | |
2655 | { | |
2656 | bfd_size_type size; | |
2657 | bfd_reloc_status_type rstat; | |
2658 | bfd_byte *buf; | |
b34976b6 | 2659 | bfd_boolean ok; |
dc810e39 | 2660 | const char *sym_name; |
252b5132 RH |
2661 | |
2662 | size = bfd_get_reloc_size (howto); | |
268b6b39 AM |
2663 | buf = bfd_zmalloc (size); |
2664 | if (buf == NULL) | |
b34976b6 | 2665 | return FALSE; |
268b6b39 | 2666 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
252b5132 RH |
2667 | switch (rstat) |
2668 | { | |
2669 | case bfd_reloc_ok: | |
2670 | break; | |
dc810e39 | 2671 | |
252b5132 RH |
2672 | default: |
2673 | case bfd_reloc_outofrange: | |
2674 | abort (); | |
dc810e39 | 2675 | |
252b5132 | 2676 | case bfd_reloc_overflow: |
dc810e39 AM |
2677 | if (link_order->type == bfd_section_reloc_link_order) |
2678 | sym_name = bfd_section_name (output_bfd, | |
2679 | link_order->u.reloc.p->u.section); | |
2680 | else | |
2681 | sym_name = link_order->u.reloc.p->u.name; | |
252b5132 | 2682 | if (! ((*info->callbacks->reloc_overflow) |
268b6b39 | 2683 | (info, sym_name, howto->name, addend, NULL, NULL, 0))) |
252b5132 RH |
2684 | { |
2685 | free (buf); | |
b34976b6 | 2686 | return FALSE; |
252b5132 RH |
2687 | } |
2688 | break; | |
2689 | } | |
268b6b39 AM |
2690 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
2691 | link_order->offset, size); | |
252b5132 RH |
2692 | free (buf); |
2693 | if (! ok) | |
b34976b6 | 2694 | return FALSE; |
252b5132 RH |
2695 | } |
2696 | ||
2697 | /* The address of a reloc is relative to the section in a | |
1049f94e | 2698 | relocatable file, and is a virtual address in an executable |
252b5132 RH |
2699 | file. */ |
2700 | offset = link_order->offset; | |
1049f94e | 2701 | if (! info->relocatable) |
252b5132 RH |
2702 | offset += output_section->vma; |
2703 | ||
947216bf AM |
2704 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
2705 | { | |
2706 | irel[i].r_offset = offset; | |
2707 | irel[i].r_info = 0; | |
2708 | irel[i].r_addend = 0; | |
2709 | } | |
140f6c8e AM |
2710 | if (bed->s->arch_size == 32) |
2711 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
2712 | else | |
2713 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
252b5132 | 2714 | |
947216bf AM |
2715 | rel_hdr = &elf_section_data (output_section)->rel_hdr; |
2716 | erel = rel_hdr->contents; | |
252b5132 RH |
2717 | if (rel_hdr->sh_type == SHT_REL) |
2718 | { | |
947216bf | 2719 | erel += (elf_section_data (output_section)->rel_count |
140f6c8e | 2720 | * bed->s->sizeof_rel); |
947216bf | 2721 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
252b5132 RH |
2722 | } |
2723 | else | |
2724 | { | |
947216bf AM |
2725 | irel[0].r_addend = addend; |
2726 | erel += (elf_section_data (output_section)->rel_count | |
140f6c8e | 2727 | * bed->s->sizeof_rela); |
947216bf | 2728 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
252b5132 RH |
2729 | } |
2730 | ||
0525d26e | 2731 | ++elf_section_data (output_section)->rel_count; |
252b5132 | 2732 | |
b34976b6 | 2733 | return TRUE; |
252b5132 | 2734 | } |
252b5132 | 2735 | \f |
252b5132 RH |
2736 | /* Garbage collect unused sections. */ |
2737 | ||
b34976b6 | 2738 | static bfd_boolean elf_gc_sweep_symbol |
268b6b39 | 2739 | (struct elf_link_hash_entry *, void *); |
252b5132 | 2740 | |
b34976b6 | 2741 | static bfd_boolean elf_gc_allocate_got_offsets |
268b6b39 | 2742 | (struct elf_link_hash_entry *, void *); |
252b5132 RH |
2743 | |
2744 | /* The mark phase of garbage collection. For a given section, mark | |
dbb410c3 AM |
2745 | it and any sections in this section's group, and all the sections |
2746 | which define symbols to which it refers. */ | |
252b5132 | 2747 | |
b34976b6 | 2748 | typedef asection * (*gc_mark_hook_fn) |
268b6b39 AM |
2749 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
2750 | struct elf_link_hash_entry *, Elf_Internal_Sym *); | |
b34976b6 AM |
2751 | |
2752 | static bfd_boolean | |
268b6b39 AM |
2753 | elf_gc_mark (struct bfd_link_info *info, |
2754 | asection *sec, | |
2755 | gc_mark_hook_fn gc_mark_hook) | |
252b5132 | 2756 | { |
b34976b6 | 2757 | bfd_boolean ret; |
dbb410c3 | 2758 | asection *group_sec; |
252b5132 RH |
2759 | |
2760 | sec->gc_mark = 1; | |
2761 | ||
dbb410c3 AM |
2762 | /* Mark all the sections in the group. */ |
2763 | group_sec = elf_section_data (sec)->next_in_group; | |
2764 | if (group_sec && !group_sec->gc_mark) | |
2765 | if (!elf_gc_mark (info, group_sec, gc_mark_hook)) | |
b34976b6 | 2766 | return FALSE; |
252b5132 | 2767 | |
dbb410c3 | 2768 | /* Look through the section relocs. */ |
b34976b6 | 2769 | ret = TRUE; |
252b5132 RH |
2770 | if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0) |
2771 | { | |
2772 | Elf_Internal_Rela *relstart, *rel, *relend; | |
2773 | Elf_Internal_Shdr *symtab_hdr; | |
2774 | struct elf_link_hash_entry **sym_hashes; | |
2775 | size_t nlocsyms; | |
2776 | size_t extsymoff; | |
252b5132 | 2777 | bfd *input_bfd = sec->owner; |
9c5bfbb7 | 2778 | const struct elf_backend_data *bed = get_elf_backend_data (input_bfd); |
6cdc0ccc | 2779 | Elf_Internal_Sym *isym = NULL; |
140f6c8e | 2780 | int r_sym_shift; |
252b5132 RH |
2781 | |
2782 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2783 | sym_hashes = elf_sym_hashes (input_bfd); | |
2784 | ||
2785 | /* Read the local symbols. */ | |
2786 | if (elf_bad_symtab (input_bfd)) | |
2787 | { | |
140f6c8e | 2788 | nlocsyms = symtab_hdr->sh_size / bed->s->sizeof_sym; |
c44233aa | 2789 | extsymoff = 0; |
252b5132 RH |
2790 | } |
2791 | else | |
2792 | extsymoff = nlocsyms = symtab_hdr->sh_info; | |
9ad5cbcf | 2793 | |
6cdc0ccc AM |
2794 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
2795 | if (isym == NULL && nlocsyms != 0) | |
9ad5cbcf | 2796 | { |
6cdc0ccc AM |
2797 | isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0, |
2798 | NULL, NULL, NULL); | |
2799 | if (isym == NULL) | |
b34976b6 | 2800 | return FALSE; |
9ad5cbcf AM |
2801 | } |
2802 | ||
252b5132 | 2803 | /* Read the relocations. */ |
268b6b39 | 2804 | relstart = _bfd_elf_link_read_relocs (input_bfd, sec, NULL, NULL, |
45d6a902 | 2805 | info->keep_memory); |
252b5132 RH |
2806 | if (relstart == NULL) |
2807 | { | |
b34976b6 | 2808 | ret = FALSE; |
252b5132 RH |
2809 | goto out1; |
2810 | } | |
c7ac6ff8 | 2811 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 2812 | |
140f6c8e AM |
2813 | if (bed->s->arch_size == 32) |
2814 | r_sym_shift = 8; | |
2815 | else | |
2816 | r_sym_shift = 32; | |
2817 | ||
252b5132 RH |
2818 | for (rel = relstart; rel < relend; rel++) |
2819 | { | |
2820 | unsigned long r_symndx; | |
2821 | asection *rsec; | |
2822 | struct elf_link_hash_entry *h; | |
252b5132 | 2823 | |
140f6c8e | 2824 | r_symndx = rel->r_info >> r_sym_shift; |
252b5132 RH |
2825 | if (r_symndx == 0) |
2826 | continue; | |
2827 | ||
6cdc0ccc AM |
2828 | if (r_symndx >= nlocsyms |
2829 | || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL) | |
252b5132 RH |
2830 | { |
2831 | h = sym_hashes[r_symndx - extsymoff]; | |
1e2f5b6e | 2832 | rsec = (*gc_mark_hook) (sec, info, rel, h, NULL); |
252b5132 RH |
2833 | } |
2834 | else | |
2835 | { | |
6cdc0ccc | 2836 | rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]); |
252b5132 RH |
2837 | } |
2838 | ||
2839 | if (rsec && !rsec->gc_mark) | |
b91afed7 AM |
2840 | { |
2841 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
2842 | rsec->gc_mark = 1; | |
2843 | else if (!elf_gc_mark (info, rsec, gc_mark_hook)) | |
2844 | { | |
b34976b6 | 2845 | ret = FALSE; |
b91afed7 AM |
2846 | goto out2; |
2847 | } | |
2848 | } | |
252b5132 RH |
2849 | } |
2850 | ||
2851 | out2: | |
6cdc0ccc | 2852 | if (elf_section_data (sec)->relocs != relstart) |
252b5132 RH |
2853 | free (relstart); |
2854 | out1: | |
6cdc0ccc AM |
2855 | if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym) |
2856 | { | |
2857 | if (! info->keep_memory) | |
2858 | free (isym); | |
2859 | else | |
2860 | symtab_hdr->contents = (unsigned char *) isym; | |
2861 | } | |
252b5132 RH |
2862 | } |
2863 | ||
2864 | return ret; | |
2865 | } | |
2866 | ||
2867 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
2868 | ||
b34976b6 | 2869 | typedef bfd_boolean (*gc_sweep_hook_fn) |
268b6b39 | 2870 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
b34976b6 AM |
2871 | |
2872 | static bfd_boolean | |
268b6b39 | 2873 | elf_gc_sweep (struct bfd_link_info *info, gc_sweep_hook_fn gc_sweep_hook) |
252b5132 RH |
2874 | { |
2875 | bfd *sub; | |
2876 | ||
2877 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
2878 | { | |
2879 | asection *o; | |
2880 | ||
f6af82bd AM |
2881 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) |
2882 | continue; | |
2883 | ||
252b5132 RH |
2884 | for (o = sub->sections; o != NULL; o = o->next) |
2885 | { | |
2886 | /* Keep special sections. Keep .debug sections. */ | |
2887 | if ((o->flags & SEC_LINKER_CREATED) | |
2888 | || (o->flags & SEC_DEBUGGING)) | |
2889 | o->gc_mark = 1; | |
2890 | ||
2891 | if (o->gc_mark) | |
2892 | continue; | |
2893 | ||
2894 | /* Skip sweeping sections already excluded. */ | |
2895 | if (o->flags & SEC_EXCLUDE) | |
2896 | continue; | |
2897 | ||
2898 | /* Since this is early in the link process, it is simple | |
2899 | to remove a section from the output. */ | |
2900 | o->flags |= SEC_EXCLUDE; | |
2901 | ||
2902 | /* But we also have to update some of the relocation | |
2903 | info we collected before. */ | |
2904 | if (gc_sweep_hook | |
2905 | && (o->flags & SEC_RELOC) && o->reloc_count > 0) | |
2906 | { | |
2907 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2908 | bfd_boolean r; |
252b5132 | 2909 | |
45d6a902 | 2910 | internal_relocs |
268b6b39 | 2911 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, |
45d6a902 | 2912 | info->keep_memory); |
252b5132 | 2913 | if (internal_relocs == NULL) |
b34976b6 | 2914 | return FALSE; |
252b5132 | 2915 | |
3e932841 | 2916 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
252b5132 | 2917 | |
6cdc0ccc | 2918 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
2919 | free (internal_relocs); |
2920 | ||
2921 | if (!r) | |
b34976b6 | 2922 | return FALSE; |
252b5132 RH |
2923 | } |
2924 | } | |
2925 | } | |
2926 | ||
2927 | /* Remove the symbols that were in the swept sections from the dynamic | |
2928 | symbol table. GCFIXME: Anyone know how to get them out of the | |
2929 | static symbol table as well? */ | |
2930 | { | |
2931 | int i = 0; | |
2932 | ||
268b6b39 | 2933 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, &i); |
252b5132 RH |
2934 | |
2935 | elf_hash_table (info)->dynsymcount = i; | |
2936 | } | |
2937 | ||
b34976b6 | 2938 | return TRUE; |
252b5132 RH |
2939 | } |
2940 | ||
2941 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
2942 | ||
b34976b6 | 2943 | static bfd_boolean |
268b6b39 | 2944 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *idxptr) |
252b5132 | 2945 | { |
268b6b39 | 2946 | int *idx = idxptr; |
252b5132 | 2947 | |
e92d460e AM |
2948 | if (h->root.type == bfd_link_hash_warning) |
2949 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2950 | ||
252b5132 RH |
2951 | if (h->dynindx != -1 |
2952 | && ((h->root.type != bfd_link_hash_defined | |
2953 | && h->root.type != bfd_link_hash_defweak) | |
2954 | || h->root.u.def.section->gc_mark)) | |
2955 | h->dynindx = (*idx)++; | |
2956 | ||
b34976b6 | 2957 | return TRUE; |
252b5132 RH |
2958 | } |
2959 | ||
4cc11e76 | 2960 | /* Propagate collected vtable information. This is called through |
252b5132 RH |
2961 | elf_link_hash_traverse. */ |
2962 | ||
b34976b6 | 2963 | static bfd_boolean |
268b6b39 | 2964 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) |
252b5132 | 2965 | { |
e92d460e AM |
2966 | if (h->root.type == bfd_link_hash_warning) |
2967 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2968 | ||
3e932841 | 2969 | /* Those that are not vtables. */ |
252b5132 | 2970 | if (h->vtable_parent == NULL) |
b34976b6 | 2971 | return TRUE; |
252b5132 RH |
2972 | |
2973 | /* Those vtables that do not have parents, we cannot merge. */ | |
2974 | if (h->vtable_parent == (struct elf_link_hash_entry *) -1) | |
b34976b6 | 2975 | return TRUE; |
252b5132 RH |
2976 | |
2977 | /* If we've already been done, exit. */ | |
2978 | if (h->vtable_entries_used && h->vtable_entries_used[-1]) | |
b34976b6 | 2979 | return TRUE; |
252b5132 RH |
2980 | |
2981 | /* Make sure the parent's table is up to date. */ | |
2982 | elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp); | |
2983 | ||
2984 | if (h->vtable_entries_used == NULL) | |
2985 | { | |
2986 | /* None of this table's entries were referenced. Re-use the | |
2987 | parent's table. */ | |
2988 | h->vtable_entries_used = h->vtable_parent->vtable_entries_used; | |
2989 | h->vtable_entries_size = h->vtable_parent->vtable_entries_size; | |
2990 | } | |
2991 | else | |
2992 | { | |
2993 | size_t n; | |
b34976b6 | 2994 | bfd_boolean *cu, *pu; |
252b5132 RH |
2995 | |
2996 | /* Or the parent's entries into ours. */ | |
2997 | cu = h->vtable_entries_used; | |
b34976b6 | 2998 | cu[-1] = TRUE; |
252b5132 RH |
2999 | pu = h->vtable_parent->vtable_entries_used; |
3000 | if (pu != NULL) | |
3001 | { | |
9c5bfbb7 AM |
3002 | const struct elf_backend_data *bed; |
3003 | unsigned int log_file_align; | |
0d1ea5c0 | 3004 | |
9c5bfbb7 AM |
3005 | bed = get_elf_backend_data (h->root.u.def.section->owner); |
3006 | log_file_align = bed->s->log_file_align; | |
45d6a902 | 3007 | n = h->vtable_parent->vtable_entries_size >> log_file_align; |
374b596d | 3008 | while (n--) |
252b5132 | 3009 | { |
374b596d | 3010 | if (*pu) |
b34976b6 | 3011 | *cu = TRUE; |
374b596d NC |
3012 | pu++; |
3013 | cu++; | |
252b5132 RH |
3014 | } |
3015 | } | |
3016 | } | |
3017 | ||
b34976b6 | 3018 | return TRUE; |
252b5132 RH |
3019 | } |
3020 | ||
b34976b6 | 3021 | static bfd_boolean |
268b6b39 | 3022 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) |
252b5132 RH |
3023 | { |
3024 | asection *sec; | |
3025 | bfd_vma hstart, hend; | |
3026 | Elf_Internal_Rela *relstart, *relend, *rel; | |
9c5bfbb7 | 3027 | const struct elf_backend_data *bed; |
45d6a902 | 3028 | unsigned int log_file_align; |
252b5132 | 3029 | |
e92d460e AM |
3030 | if (h->root.type == bfd_link_hash_warning) |
3031 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3032 | ||
252b5132 RH |
3033 | /* Take care of both those symbols that do not describe vtables as |
3034 | well as those that are not loaded. */ | |
3035 | if (h->vtable_parent == NULL) | |
b34976b6 | 3036 | return TRUE; |
252b5132 RH |
3037 | |
3038 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
3039 | || h->root.type == bfd_link_hash_defweak); | |
3040 | ||
3041 | sec = h->root.u.def.section; | |
3042 | hstart = h->root.u.def.value; | |
3043 | hend = hstart + h->size; | |
3044 | ||
268b6b39 | 3045 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); |
252b5132 | 3046 | if (!relstart) |
b34976b6 | 3047 | return *(bfd_boolean *) okp = FALSE; |
c7ac6ff8 | 3048 | bed = get_elf_backend_data (sec->owner); |
45d6a902 | 3049 | log_file_align = bed->s->log_file_align; |
0d1ea5c0 | 3050 | |
c7ac6ff8 | 3051 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
3052 | |
3053 | for (rel = relstart; rel < relend; ++rel) | |
3054 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
3055 | { | |
3056 | /* If the entry is in use, do nothing. */ | |
3057 | if (h->vtable_entries_used | |
3058 | && (rel->r_offset - hstart) < h->vtable_entries_size) | |
3059 | { | |
45d6a902 | 3060 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; |
252b5132 RH |
3061 | if (h->vtable_entries_used[entry]) |
3062 | continue; | |
3063 | } | |
3064 | /* Otherwise, kill it. */ | |
3065 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
3066 | } | |
3067 | ||
b34976b6 | 3068 | return TRUE; |
252b5132 RH |
3069 | } |
3070 | ||
3071 | /* Do mark and sweep of unused sections. */ | |
3072 | ||
b34976b6 | 3073 | bfd_boolean |
268b6b39 | 3074 | elf_gc_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 3075 | { |
b34976b6 | 3076 | bfd_boolean ok = TRUE; |
252b5132 RH |
3077 | bfd *sub; |
3078 | asection * (*gc_mark_hook) | |
268b6b39 AM |
3079 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
3080 | struct elf_link_hash_entry *h, Elf_Internal_Sym *); | |
252b5132 RH |
3081 | |
3082 | if (!get_elf_backend_data (abfd)->can_gc_sections | |
0eddce27 AM |
3083 | || info->relocatable |
3084 | || info->emitrelocations | |
3085 | || !is_elf_hash_table (info->hash) | |
252b5132 | 3086 | || elf_hash_table (info)->dynamic_sections_created) |
2627de83 AM |
3087 | { |
3088 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
3089 | return TRUE; | |
3090 | } | |
252b5132 RH |
3091 | |
3092 | /* Apply transitive closure to the vtable entry usage info. */ | |
3093 | elf_link_hash_traverse (elf_hash_table (info), | |
3094 | elf_gc_propagate_vtable_entries_used, | |
268b6b39 | 3095 | &ok); |
252b5132 | 3096 | if (!ok) |
b34976b6 | 3097 | return FALSE; |
252b5132 RH |
3098 | |
3099 | /* Kill the vtable relocations that were not used. */ | |
3100 | elf_link_hash_traverse (elf_hash_table (info), | |
3101 | elf_gc_smash_unused_vtentry_relocs, | |
268b6b39 | 3102 | &ok); |
252b5132 | 3103 | if (!ok) |
b34976b6 | 3104 | return FALSE; |
252b5132 RH |
3105 | |
3106 | /* Grovel through relocs to find out who stays ... */ | |
3107 | ||
3108 | gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook; | |
3109 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3110 | { | |
3111 | asection *o; | |
f6af82bd AM |
3112 | |
3113 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
3114 | continue; | |
3115 | ||
252b5132 RH |
3116 | for (o = sub->sections; o != NULL; o = o->next) |
3117 | { | |
3118 | if (o->flags & SEC_KEEP) | |
c44233aa | 3119 | if (!elf_gc_mark (info, o, gc_mark_hook)) |
b34976b6 | 3120 | return FALSE; |
252b5132 RH |
3121 | } |
3122 | } | |
3123 | ||
3124 | /* ... and mark SEC_EXCLUDE for those that go. */ | |
a7b97311 | 3125 | if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook)) |
b34976b6 | 3126 | return FALSE; |
252b5132 | 3127 | |
b34976b6 | 3128 | return TRUE; |
252b5132 RH |
3129 | } |
3130 | \f | |
4cc11e76 | 3131 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ |
252b5132 | 3132 | |
b34976b6 | 3133 | bfd_boolean |
268b6b39 AM |
3134 | elf_gc_record_vtinherit (bfd *abfd, |
3135 | asection *sec, | |
3136 | struct elf_link_hash_entry *h, | |
3137 | bfd_vma offset) | |
252b5132 RH |
3138 | { |
3139 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
3140 | struct elf_link_hash_entry **search, *child; | |
3141 | bfd_size_type extsymcount; | |
140f6c8e | 3142 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 RH |
3143 | |
3144 | /* The sh_info field of the symtab header tells us where the | |
3145 | external symbols start. We don't care about the local symbols at | |
3146 | this point. */ | |
140f6c8e | 3147 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; |
252b5132 RH |
3148 | if (!elf_bad_symtab (abfd)) |
3149 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
3150 | ||
3151 | sym_hashes = elf_sym_hashes (abfd); | |
3152 | sym_hashes_end = sym_hashes + extsymcount; | |
3153 | ||
3154 | /* Hunt down the child symbol, which is in this section at the same | |
3155 | offset as the relocation. */ | |
3156 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
3157 | { | |
3158 | if ((child = *search) != NULL | |
3159 | && (child->root.type == bfd_link_hash_defined | |
3160 | || child->root.type == bfd_link_hash_defweak) | |
3161 | && child->root.u.def.section == sec | |
3162 | && child->root.u.def.value == offset) | |
3163 | goto win; | |
3164 | } | |
3165 | ||
3166 | (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT", | |
8f615d07 | 3167 | bfd_archive_filename (abfd), sec->name, |
a7b97311 | 3168 | (unsigned long) offset); |
252b5132 | 3169 | bfd_set_error (bfd_error_invalid_operation); |
b34976b6 | 3170 | return FALSE; |
252b5132 | 3171 | |
dc810e39 | 3172 | win: |
252b5132 RH |
3173 | if (!h) |
3174 | { | |
3175 | /* This *should* only be the absolute section. It could potentially | |
3176 | be that someone has defined a non-global vtable though, which | |
3177 | would be bad. It isn't worth paging in the local symbols to be | |
3178 | sure though; that case should simply be handled by the assembler. */ | |
3179 | ||
3180 | child->vtable_parent = (struct elf_link_hash_entry *) -1; | |
3181 | } | |
3182 | else | |
3183 | child->vtable_parent = h; | |
3184 | ||
b34976b6 | 3185 | return TRUE; |
252b5132 RH |
3186 | } |
3187 | ||
4cc11e76 | 3188 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ |
252b5132 | 3189 | |
b34976b6 | 3190 | bfd_boolean |
268b6b39 AM |
3191 | elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, |
3192 | asection *sec ATTRIBUTE_UNUSED, | |
3193 | struct elf_link_hash_entry *h, | |
3194 | bfd_vma addend) | |
252b5132 | 3195 | { |
9c5bfbb7 | 3196 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
45d6a902 | 3197 | unsigned int log_file_align = bed->s->log_file_align; |
0d1ea5c0 | 3198 | |
64c456e1 | 3199 | if (addend >= h->vtable_entries_size) |
252b5132 | 3200 | { |
64c456e1 | 3201 | size_t size, bytes, file_align; |
b34976b6 | 3202 | bfd_boolean *ptr = h->vtable_entries_used; |
252b5132 RH |
3203 | |
3204 | /* While the symbol is undefined, we have to be prepared to handle | |
3205 | a zero size. */ | |
64c456e1 | 3206 | file_align = 1 << log_file_align; |
252b5132 | 3207 | if (h->root.type == bfd_link_hash_undefined) |
64c456e1 | 3208 | size = addend + file_align; |
252b5132 RH |
3209 | else |
3210 | { | |
3211 | size = h->size; | |
64c456e1 | 3212 | if (addend >= size) |
252b5132 RH |
3213 | { |
3214 | /* Oops! We've got a reference past the defined end of | |
3215 | the table. This is probably a bug -- shall we warn? */ | |
64c456e1 | 3216 | size = addend + file_align; |
252b5132 RH |
3217 | } |
3218 | } | |
64c456e1 | 3219 | size = (size + file_align - 1) & -file_align; |
252b5132 RH |
3220 | |
3221 | /* Allocate one extra entry for use as a "done" flag for the | |
64c456e1 AM |
3222 | consolidation pass. */ |
3223 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
252b5132 RH |
3224 | |
3225 | if (ptr) | |
3226 | { | |
268b6b39 | 3227 | ptr = bfd_realloc (ptr - 1, bytes); |
3e932841 | 3228 | |
fed79cc6 NC |
3229 | if (ptr != NULL) |
3230 | { | |
3231 | size_t oldbytes; | |
252b5132 | 3232 | |
45d6a902 | 3233 | oldbytes = (((h->vtable_entries_size >> log_file_align) + 1) |
b34976b6 | 3234 | * sizeof (bfd_boolean)); |
a7b97311 | 3235 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
fed79cc6 | 3236 | } |
252b5132 RH |
3237 | } |
3238 | else | |
268b6b39 | 3239 | ptr = bfd_zmalloc (bytes); |
252b5132 | 3240 | |
fed79cc6 | 3241 | if (ptr == NULL) |
b34976b6 | 3242 | return FALSE; |
3e932841 | 3243 | |
252b5132 | 3244 | /* And arrange for that done flag to be at index -1. */ |
fed79cc6 | 3245 | h->vtable_entries_used = ptr + 1; |
252b5132 RH |
3246 | h->vtable_entries_size = size; |
3247 | } | |
3e932841 | 3248 | |
45d6a902 | 3249 | h->vtable_entries_used[addend >> log_file_align] = TRUE; |
252b5132 | 3250 | |
b34976b6 | 3251 | return TRUE; |
252b5132 RH |
3252 | } |
3253 | ||
140f6c8e AM |
3254 | struct alloc_got_off_arg { |
3255 | bfd_vma gotoff; | |
3256 | unsigned int got_elt_size; | |
3257 | }; | |
3258 | ||
252b5132 RH |
3259 | /* And an accompanying bit to work out final got entry offsets once |
3260 | we're done. Should be called from final_link. */ | |
3261 | ||
b34976b6 | 3262 | bfd_boolean |
268b6b39 AM |
3263 | elf_gc_common_finalize_got_offsets (bfd *abfd, |
3264 | struct bfd_link_info *info) | |
252b5132 RH |
3265 | { |
3266 | bfd *i; | |
9c5bfbb7 | 3267 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 | 3268 | bfd_vma gotoff; |
140f6c8e AM |
3269 | unsigned int got_elt_size = bed->s->arch_size / 8; |
3270 | struct alloc_got_off_arg gofarg; | |
252b5132 | 3271 | |
0eddce27 AM |
3272 | if (! is_elf_hash_table (info->hash)) |
3273 | return FALSE; | |
3274 | ||
252b5132 RH |
3275 | /* The GOT offset is relative to the .got section, but the GOT header is |
3276 | put into the .got.plt section, if the backend uses it. */ | |
3277 | if (bed->want_got_plt) | |
3278 | gotoff = 0; | |
3279 | else | |
3280 | gotoff = bed->got_header_size; | |
3281 | ||
3282 | /* Do the local .got entries first. */ | |
3283 | for (i = info->input_bfds; i; i = i->link_next) | |
3284 | { | |
f6af82bd | 3285 | bfd_signed_vma *local_got; |
252b5132 RH |
3286 | bfd_size_type j, locsymcount; |
3287 | Elf_Internal_Shdr *symtab_hdr; | |
3288 | ||
f6af82bd AM |
3289 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
3290 | continue; | |
3291 | ||
3292 | local_got = elf_local_got_refcounts (i); | |
252b5132 RH |
3293 | if (!local_got) |
3294 | continue; | |
3295 | ||
3296 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
3297 | if (elf_bad_symtab (i)) | |
140f6c8e | 3298 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; |
252b5132 RH |
3299 | else |
3300 | locsymcount = symtab_hdr->sh_info; | |
3301 | ||
3302 | for (j = 0; j < locsymcount; ++j) | |
3303 | { | |
3304 | if (local_got[j] > 0) | |
3305 | { | |
3306 | local_got[j] = gotoff; | |
140f6c8e | 3307 | gotoff += got_elt_size; |
252b5132 RH |
3308 | } |
3309 | else | |
3310 | local_got[j] = (bfd_vma) -1; | |
3311 | } | |
3312 | } | |
3313 | ||
dd5724d5 AM |
3314 | /* Then the global .got entries. .plt refcounts are handled by |
3315 | adjust_dynamic_symbol */ | |
140f6c8e AM |
3316 | gofarg.gotoff = gotoff; |
3317 | gofarg.got_elt_size = got_elt_size; | |
252b5132 RH |
3318 | elf_link_hash_traverse (elf_hash_table (info), |
3319 | elf_gc_allocate_got_offsets, | |
140f6c8e | 3320 | &gofarg); |
b34976b6 | 3321 | return TRUE; |
252b5132 RH |
3322 | } |
3323 | ||
3324 | /* We need a special top-level link routine to convert got reference counts | |
3325 | to real got offsets. */ | |
3326 | ||
b34976b6 | 3327 | static bfd_boolean |
140f6c8e | 3328 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) |
252b5132 | 3329 | { |
140f6c8e | 3330 | struct alloc_got_off_arg *gofarg = arg; |
252b5132 | 3331 | |
e92d460e AM |
3332 | if (h->root.type == bfd_link_hash_warning) |
3333 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3334 | ||
252b5132 RH |
3335 | if (h->got.refcount > 0) |
3336 | { | |
140f6c8e AM |
3337 | h->got.offset = gofarg->gotoff; |
3338 | gofarg->gotoff += gofarg->got_elt_size; | |
252b5132 RH |
3339 | } |
3340 | else | |
3341 | h->got.offset = (bfd_vma) -1; | |
3342 | ||
b34976b6 | 3343 | return TRUE; |
252b5132 RH |
3344 | } |
3345 | ||
3346 | /* Many folk need no more in the way of final link than this, once | |
3347 | got entry reference counting is enabled. */ | |
3348 | ||
b34976b6 | 3349 | bfd_boolean |
268b6b39 | 3350 | elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
3351 | { |
3352 | if (!elf_gc_common_finalize_got_offsets (abfd, info)) | |
b34976b6 | 3353 | return FALSE; |
252b5132 RH |
3354 | |
3355 | /* Invoke the regular ELF backend linker to do all the work. */ | |
3356 | return elf_bfd_final_link (abfd, info); | |
3357 | } | |
3358 | ||
b34976b6 | 3359 | bfd_boolean |
268b6b39 | 3360 | elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) |
73d074b4 | 3361 | { |
268b6b39 | 3362 | struct elf_reloc_cookie *rcookie = cookie; |
73d074b4 DJ |
3363 | |
3364 | if (rcookie->bad_symtab) | |
3365 | rcookie->rel = rcookie->rels; | |
3366 | ||
3367 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
3368 | { | |
d6fe2dc1 | 3369 | unsigned long r_symndx; |
73d074b4 DJ |
3370 | |
3371 | if (! rcookie->bad_symtab) | |
3372 | if (rcookie->rel->r_offset > offset) | |
b34976b6 | 3373 | return FALSE; |
73d074b4 DJ |
3374 | if (rcookie->rel->r_offset != offset) |
3375 | continue; | |
3376 | ||
140f6c8e | 3377 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; |
d6fe2dc1 | 3378 | if (r_symndx == SHN_UNDEF) |
b34976b6 | 3379 | return TRUE; |
d6fe2dc1 | 3380 | |
73d074b4 | 3381 | if (r_symndx >= rcookie->locsymcount |
6cdc0ccc | 3382 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) |
73d074b4 DJ |
3383 | { |
3384 | struct elf_link_hash_entry *h; | |
3385 | ||
3386 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
3387 | ||
3388 | while (h->root.type == bfd_link_hash_indirect | |
3389 | || h->root.type == bfd_link_hash_warning) | |
3390 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3391 | ||
3392 | if ((h->root.type == bfd_link_hash_defined | |
3393 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 3394 | && elf_discarded_section (h->root.u.def.section)) |
b34976b6 | 3395 | return TRUE; |
73d074b4 | 3396 | else |
b34976b6 | 3397 | return FALSE; |
73d074b4 | 3398 | } |
6cdc0ccc | 3399 | else |
73d074b4 DJ |
3400 | { |
3401 | /* It's not a relocation against a global symbol, | |
44421011 | 3402 | but it could be a relocation against a local |
73d074b4 DJ |
3403 | symbol for a discarded section. */ |
3404 | asection *isec; | |
6cdc0ccc | 3405 | Elf_Internal_Sym *isym; |
73d074b4 DJ |
3406 | |
3407 | /* Need to: get the symbol; get the section. */ | |
6cdc0ccc AM |
3408 | isym = &rcookie->locsyms[r_symndx]; |
3409 | if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
73d074b4 | 3410 | { |
140f6c8e | 3411 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
ed4de5e2 | 3412 | if (isec != NULL && elf_discarded_section (isec)) |
b34976b6 | 3413 | return TRUE; |
73d074b4 DJ |
3414 | } |
3415 | } | |
b34976b6 | 3416 | return FALSE; |
73d074b4 | 3417 | } |
b34976b6 | 3418 | return FALSE; |
73d074b4 DJ |
3419 | } |
3420 | ||
3421 | /* Discard unneeded references to discarded sections. | |
b34976b6 | 3422 | Returns TRUE if any section's size was changed. */ |
73d074b4 | 3423 | /* This function assumes that the relocations are in sorted order, |
ab3acfbe | 3424 | which is true for all known assemblers. */ |
73d074b4 | 3425 | |
b34976b6 | 3426 | bfd_boolean |
268b6b39 | 3427 | elf_bfd_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
73d074b4 DJ |
3428 | { |
3429 | struct elf_reloc_cookie cookie; | |
126495ed | 3430 | asection *stab, *eh; |
73d074b4 | 3431 | Elf_Internal_Shdr *symtab_hdr; |
9c5bfbb7 | 3432 | const struct elf_backend_data *bed; |
73d074b4 | 3433 | bfd *abfd; |
99eb2ac8 | 3434 | unsigned int count; |
b34976b6 | 3435 | bfd_boolean ret = FALSE; |
73d074b4 | 3436 | |
d6fe2dc1 | 3437 | if (info->traditional_format |
0eddce27 | 3438 | || !is_elf_hash_table (info->hash)) |
b34976b6 | 3439 | return FALSE; |
65765700 | 3440 | |
73d074b4 DJ |
3441 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
3442 | { | |
163c1c30 L |
3443 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
3444 | continue; | |
3445 | ||
73d074b4 DJ |
3446 | bed = get_elf_backend_data (abfd); |
3447 | ||
3448 | if ((abfd->flags & DYNAMIC) != 0) | |
3449 | continue; | |
3450 | ||
126495ed | 3451 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); |
1049f94e | 3452 | if (info->relocatable |
2d36fe5f AH |
3453 | || (eh != NULL |
3454 | && (eh->_raw_size == 0 | |
3455 | || bfd_is_abs_section (eh->output_section)))) | |
126495ed | 3456 | eh = NULL; |
65765700 | 3457 | |
99eb2ac8 AM |
3458 | stab = bfd_get_section_by_name (abfd, ".stab"); |
3459 | if (stab != NULL | |
3460 | && (stab->_raw_size == 0 | |
3461 | || bfd_is_abs_section (stab->output_section) | |
68bfbfcc | 3462 | || stab->sec_info_type != ELF_INFO_TYPE_STABS)) |
99eb2ac8 AM |
3463 | stab = NULL; |
3464 | ||
3465 | if (stab == NULL | |
3466 | && eh == NULL | |
3467 | && bed->elf_backend_discard_info == NULL) | |
73d074b4 DJ |
3468 | continue; |
3469 | ||
3470 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
73d074b4 DJ |
3471 | cookie.abfd = abfd; |
3472 | cookie.sym_hashes = elf_sym_hashes (abfd); | |
3473 | cookie.bad_symtab = elf_bad_symtab (abfd); | |
3474 | if (cookie.bad_symtab) | |
3475 | { | |
140f6c8e | 3476 | cookie.locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; |
73d074b4 DJ |
3477 | cookie.extsymoff = 0; |
3478 | } | |
3479 | else | |
3480 | { | |
3481 | cookie.locsymcount = symtab_hdr->sh_info; | |
3482 | cookie.extsymoff = symtab_hdr->sh_info; | |
3483 | } | |
3484 | ||
140f6c8e AM |
3485 | if (bed->s->arch_size == 32) |
3486 | cookie.r_sym_shift = 8; | |
3487 | else | |
3488 | cookie.r_sym_shift = 32; | |
3489 | ||
6cdc0ccc AM |
3490 | cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
3491 | if (cookie.locsyms == NULL && cookie.locsymcount != 0) | |
c44233aa | 3492 | { |
6cdc0ccc AM |
3493 | cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
3494 | cookie.locsymcount, 0, | |
3495 | NULL, NULL, NULL); | |
c44233aa | 3496 | if (cookie.locsyms == NULL) |
b34976b6 | 3497 | return FALSE; |
9ad5cbcf | 3498 | } |
73d074b4 | 3499 | |
99eb2ac8 | 3500 | if (stab != NULL) |
73d074b4 | 3501 | { |
99eb2ac8 AM |
3502 | cookie.rels = NULL; |
3503 | count = stab->reloc_count; | |
3504 | if (count != 0) | |
268b6b39 AM |
3505 | cookie.rels = _bfd_elf_link_read_relocs (abfd, stab, NULL, NULL, |
3506 | info->keep_memory); | |
99eb2ac8 | 3507 | if (cookie.rels != NULL) |
73d074b4 DJ |
3508 | { |
3509 | cookie.rel = cookie.rels; | |
99eb2ac8 AM |
3510 | cookie.relend = cookie.rels; |
3511 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
65765700 JJ |
3512 | if (_bfd_discard_section_stabs (abfd, stab, |
3513 | elf_section_data (stab)->sec_info, | |
73d074b4 DJ |
3514 | elf_reloc_symbol_deleted_p, |
3515 | &cookie)) | |
b34976b6 | 3516 | ret = TRUE; |
6cdc0ccc | 3517 | if (elf_section_data (stab)->relocs != cookie.rels) |
73d074b4 DJ |
3518 | free (cookie.rels); |
3519 | } | |
3520 | } | |
3521 | ||
99eb2ac8 | 3522 | if (eh != NULL) |
65765700 JJ |
3523 | { |
3524 | cookie.rels = NULL; | |
99eb2ac8 AM |
3525 | count = eh->reloc_count; |
3526 | if (count != 0) | |
268b6b39 AM |
3527 | cookie.rels = _bfd_elf_link_read_relocs (abfd, eh, NULL, NULL, |
3528 | info->keep_memory); | |
99eb2ac8 AM |
3529 | cookie.rel = cookie.rels; |
3530 | cookie.relend = cookie.rels; | |
3531 | if (cookie.rels != NULL) | |
3532 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
3533 | ||
126495ed | 3534 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
65765700 JJ |
3535 | elf_reloc_symbol_deleted_p, |
3536 | &cookie)) | |
b34976b6 | 3537 | ret = TRUE; |
99eb2ac8 AM |
3538 | |
3539 | if (cookie.rels != NULL | |
3540 | && elf_section_data (eh)->relocs != cookie.rels) | |
65765700 JJ |
3541 | free (cookie.rels); |
3542 | } | |
3543 | ||
99eb2ac8 AM |
3544 | if (bed->elf_backend_discard_info != NULL |
3545 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
b34976b6 | 3546 | ret = TRUE; |
73d074b4 | 3547 | |
6cdc0ccc AM |
3548 | if (cookie.locsyms != NULL |
3549 | && symtab_hdr->contents != (unsigned char *) cookie.locsyms) | |
3550 | { | |
3551 | if (! info->keep_memory) | |
3552 | free (cookie.locsyms); | |
3553 | else | |
3554 | symtab_hdr->contents = (unsigned char *) cookie.locsyms; | |
3555 | } | |
73d074b4 | 3556 | } |
65765700 | 3557 | |
126495ed | 3558 | if (info->eh_frame_hdr |
1049f94e | 3559 | && !info->relocatable |
126495ed | 3560 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
b34976b6 | 3561 | ret = TRUE; |
99eb2ac8 | 3562 | |
73d074b4 DJ |
3563 | return ret; |
3564 | } | |
3565 | ||
b34976b6 | 3566 | static bfd_boolean |
268b6b39 | 3567 | elf_section_ignore_discarded_relocs (asection *sec) |
73d074b4 | 3568 | { |
9c5bfbb7 | 3569 | const struct elf_backend_data *bed; |
40b829d4 | 3570 | |
68bfbfcc | 3571 | switch (sec->sec_info_type) |
65765700 JJ |
3572 | { |
3573 | case ELF_INFO_TYPE_STABS: | |
3574 | case ELF_INFO_TYPE_EH_FRAME: | |
b34976b6 | 3575 | return TRUE; |
65765700 JJ |
3576 | default: |
3577 | break; | |
3578 | } | |
40b829d4 AM |
3579 | |
3580 | bed = get_elf_backend_data (sec->owner); | |
3581 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
3582 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
b34976b6 | 3583 | return TRUE; |
65765700 | 3584 | |
b34976b6 | 3585 | return FALSE; |
73d074b4 | 3586 | } |