Commit | Line | Data |
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8afe83be | 1 | /* ELF linker support. |
56f3b62c | 2 | Copyright 1995, 1996, 1997 Free Software Foundation, Inc. |
8afe83be KR |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
943fbd5b | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
452a5efb | 19 | |
ede4eed4 KR |
20 | /* ELF linker code. */ |
21 | ||
22 | static boolean elf_link_add_object_symbols | |
23 | PARAMS ((bfd *, struct bfd_link_info *)); | |
24 | static boolean elf_link_add_archive_symbols | |
25 | PARAMS ((bfd *, struct bfd_link_info *)); | |
ede4eed4 KR |
26 | static boolean elf_export_symbol |
27 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
28 | static boolean elf_adjust_dynamic_symbol | |
29 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
d044b40a ILT |
30 | static boolean elf_link_find_version_dependencies |
31 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
32 | static boolean elf_link_find_version_dependencies | |
33 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
34 | static boolean elf_link_assign_sym_version | |
35 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
36 | static boolean elf_link_renumber_dynsyms | |
37 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
ede4eed4 KR |
38 | |
39 | /* This struct is used to pass information to routines called via | |
40 | elf_link_hash_traverse which must return failure. */ | |
41 | ||
42 | struct elf_info_failed | |
43 | { | |
44 | boolean failed; | |
45 | struct bfd_link_info *info; | |
ff12f303 | 46 | }; |
ede4eed4 KR |
47 | |
48 | /* Given an ELF BFD, add symbols to the global hash table as | |
49 | appropriate. */ | |
50 | ||
51 | boolean | |
52 | elf_bfd_link_add_symbols (abfd, info) | |
53 | bfd *abfd; | |
54 | struct bfd_link_info *info; | |
55 | { | |
ede4eed4 KR |
56 | switch (bfd_get_format (abfd)) |
57 | { | |
58 | case bfd_object: | |
59 | return elf_link_add_object_symbols (abfd, info); | |
60 | case bfd_archive: | |
ede4eed4 KR |
61 | return elf_link_add_archive_symbols (abfd, info); |
62 | default: | |
63 | bfd_set_error (bfd_error_wrong_format); | |
64 | return false; | |
65 | } | |
66 | } | |
3b3753b8 | 67 | \f |
ede4eed4 KR |
68 | |
69 | /* Add symbols from an ELF archive file to the linker hash table. We | |
70 | don't use _bfd_generic_link_add_archive_symbols because of a | |
71 | problem which arises on UnixWare. The UnixWare libc.so is an | |
72 | archive which includes an entry libc.so.1 which defines a bunch of | |
73 | symbols. The libc.so archive also includes a number of other | |
74 | object files, which also define symbols, some of which are the same | |
75 | as those defined in libc.so.1. Correct linking requires that we | |
76 | consider each object file in turn, and include it if it defines any | |
77 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
78 | this; it looks through the list of undefined symbols, and includes | |
79 | any object file which defines them. When this algorithm is used on | |
80 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
81 | bunch of symbols. This means that some of the other objects in the | |
82 | archive are not included in the link, which is incorrect since they | |
83 | precede libc.so.1 in the archive. | |
84 | ||
85 | Fortunately, ELF archive handling is simpler than that done by | |
86 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
87 | oddities. In ELF, if we find a symbol in the archive map, and the | |
88 | symbol is currently undefined, we know that we must pull in that | |
89 | object file. | |
90 | ||
91 | Unfortunately, we do have to make multiple passes over the symbol | |
92 | table until nothing further is resolved. */ | |
93 | ||
94 | static boolean | |
95 | elf_link_add_archive_symbols (abfd, info) | |
96 | bfd *abfd; | |
97 | struct bfd_link_info *info; | |
98 | { | |
99 | symindex c; | |
100 | boolean *defined = NULL; | |
101 | boolean *included = NULL; | |
102 | carsym *symdefs; | |
103 | boolean loop; | |
104 | ||
105 | if (! bfd_has_map (abfd)) | |
106 | { | |
107 | /* An empty archive is a special case. */ | |
108 | if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL) | |
109 | return true; | |
110 | bfd_set_error (bfd_error_no_armap); | |
111 | return false; | |
112 | } | |
113 | ||
114 | /* Keep track of all symbols we know to be already defined, and all | |
115 | files we know to be already included. This is to speed up the | |
116 | second and subsequent passes. */ | |
117 | c = bfd_ardata (abfd)->symdef_count; | |
118 | if (c == 0) | |
119 | return true; | |
58142f10 ILT |
120 | defined = (boolean *) bfd_malloc (c * sizeof (boolean)); |
121 | included = (boolean *) bfd_malloc (c * sizeof (boolean)); | |
ede4eed4 | 122 | if (defined == (boolean *) NULL || included == (boolean *) NULL) |
58142f10 | 123 | goto error_return; |
ede4eed4 KR |
124 | memset (defined, 0, c * sizeof (boolean)); |
125 | memset (included, 0, c * sizeof (boolean)); | |
126 | ||
127 | symdefs = bfd_ardata (abfd)->symdefs; | |
128 | ||
129 | do | |
130 | { | |
131 | file_ptr last; | |
132 | symindex i; | |
133 | carsym *symdef; | |
134 | carsym *symdefend; | |
135 | ||
136 | loop = false; | |
137 | last = -1; | |
138 | ||
139 | symdef = symdefs; | |
140 | symdefend = symdef + c; | |
141 | for (i = 0; symdef < symdefend; symdef++, i++) | |
142 | { | |
143 | struct elf_link_hash_entry *h; | |
144 | bfd *element; | |
145 | struct bfd_link_hash_entry *undefs_tail; | |
146 | symindex mark; | |
147 | ||
148 | if (defined[i] || included[i]) | |
149 | continue; | |
150 | if (symdef->file_offset == last) | |
151 | { | |
152 | included[i] = true; | |
153 | continue; | |
154 | } | |
155 | ||
156 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
157 | false, false, false); | |
d044b40a ILT |
158 | |
159 | if (h == NULL) | |
160 | { | |
161 | char *p, *copy; | |
162 | ||
163 | /* If this is a default version (the name contains @@), | |
164 | look up the symbol again without the version. The | |
165 | effect is that references to the symbol without the | |
166 | version will be matched by the default symbol in the | |
167 | archive. */ | |
168 | ||
169 | p = strchr (symdef->name, ELF_VER_CHR); | |
170 | if (p == NULL || p[1] != ELF_VER_CHR) | |
171 | continue; | |
172 | ||
173 | copy = bfd_alloc (abfd, p - symdef->name + 1); | |
174 | if (copy == NULL) | |
175 | goto error_return; | |
176 | memcpy (copy, symdef->name, p - symdef->name); | |
177 | copy[p - symdef->name] = '\0'; | |
178 | ||
179 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
180 | false, false, false); | |
181 | ||
182 | bfd_release (abfd, copy); | |
183 | } | |
184 | ||
185 | if (h == NULL) | |
ede4eed4 | 186 | continue; |
d044b40a | 187 | |
ede4eed4 KR |
188 | if (h->root.type != bfd_link_hash_undefined) |
189 | { | |
68807a39 ILT |
190 | if (h->root.type != bfd_link_hash_undefweak) |
191 | defined[i] = true; | |
ede4eed4 KR |
192 | continue; |
193 | } | |
194 | ||
195 | /* We need to include this archive member. */ | |
196 | ||
197 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
198 | if (element == (bfd *) NULL) | |
199 | goto error_return; | |
200 | ||
201 | if (! bfd_check_format (element, bfd_object)) | |
202 | goto error_return; | |
203 | ||
204 | /* Doublecheck that we have not included this object | |
205 | already--it should be impossible, but there may be | |
206 | something wrong with the archive. */ | |
207 | if (element->archive_pass != 0) | |
208 | { | |
209 | bfd_set_error (bfd_error_bad_value); | |
210 | goto error_return; | |
211 | } | |
212 | element->archive_pass = 1; | |
213 | ||
214 | undefs_tail = info->hash->undefs_tail; | |
215 | ||
216 | if (! (*info->callbacks->add_archive_element) (info, element, | |
217 | symdef->name)) | |
218 | goto error_return; | |
219 | if (! elf_link_add_object_symbols (element, info)) | |
220 | goto error_return; | |
221 | ||
222 | /* If there are any new undefined symbols, we need to make | |
223 | another pass through the archive in order to see whether | |
224 | they can be defined. FIXME: This isn't perfect, because | |
225 | common symbols wind up on undefs_tail and because an | |
226 | undefined symbol which is defined later on in this pass | |
227 | does not require another pass. This isn't a bug, but it | |
228 | does make the code less efficient than it could be. */ | |
229 | if (undefs_tail != info->hash->undefs_tail) | |
230 | loop = true; | |
231 | ||
232 | /* Look backward to mark all symbols from this object file | |
233 | which we have already seen in this pass. */ | |
234 | mark = i; | |
235 | do | |
236 | { | |
237 | included[mark] = true; | |
238 | if (mark == 0) | |
239 | break; | |
240 | --mark; | |
241 | } | |
242 | while (symdefs[mark].file_offset == symdef->file_offset); | |
243 | ||
244 | /* We mark subsequent symbols from this object file as we go | |
245 | on through the loop. */ | |
246 | last = symdef->file_offset; | |
247 | } | |
248 | } | |
249 | while (loop); | |
250 | ||
251 | free (defined); | |
252 | free (included); | |
253 | ||
254 | return true; | |
255 | ||
256 | error_return: | |
257 | if (defined != (boolean *) NULL) | |
258 | free (defined); | |
259 | if (included != (boolean *) NULL) | |
260 | free (included); | |
261 | return false; | |
262 | } | |
263 | ||
264 | /* Add symbols from an ELF object file to the linker hash table. */ | |
265 | ||
266 | static boolean | |
267 | elf_link_add_object_symbols (abfd, info) | |
268 | bfd *abfd; | |
269 | struct bfd_link_info *info; | |
270 | { | |
271 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
272 | const Elf_Internal_Sym *, | |
273 | const char **, flagword *, | |
274 | asection **, bfd_vma *)); | |
275 | boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *, | |
276 | asection *, const Elf_Internal_Rela *)); | |
277 | boolean collect; | |
278 | Elf_Internal_Shdr *hdr; | |
279 | size_t symcount; | |
280 | size_t extsymcount; | |
281 | size_t extsymoff; | |
282 | Elf_External_Sym *buf = NULL; | |
283 | struct elf_link_hash_entry **sym_hash; | |
284 | boolean dynamic; | |
d044b40a ILT |
285 | bfd_byte *dynver = NULL; |
286 | Elf_External_Versym *extversym = NULL; | |
287 | Elf_External_Versym *ever; | |
ede4eed4 KR |
288 | Elf_External_Dyn *dynbuf = NULL; |
289 | struct elf_link_hash_entry *weaks; | |
290 | Elf_External_Sym *esym; | |
291 | Elf_External_Sym *esymend; | |
292 | ||
293 | add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook; | |
294 | collect = get_elf_backend_data (abfd)->collect; | |
295 | ||
d044b40a ILT |
296 | if ((abfd->flags & DYNAMIC) == 0) |
297 | dynamic = false; | |
298 | else | |
299 | { | |
300 | dynamic = true; | |
301 | ||
302 | /* You can't use -r against a dynamic object. Also, there's no | |
303 | hope of using a dynamic object which does not exactly match | |
304 | the format of the output file. */ | |
305 | if (info->relocateable || info->hash->creator != abfd->xvec) | |
306 | { | |
307 | bfd_set_error (bfd_error_invalid_operation); | |
308 | goto error_return; | |
309 | } | |
310 | } | |
311 | ||
0cb70568 ILT |
312 | /* As a GNU extension, any input sections which are named |
313 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
314 | symbol. This differs from .gnu.warning sections, which generate | |
315 | warnings when they are included in an output file. */ | |
316 | if (! info->shared) | |
317 | { | |
318 | asection *s; | |
319 | ||
320 | for (s = abfd->sections; s != NULL; s = s->next) | |
321 | { | |
322 | const char *name; | |
323 | ||
324 | name = bfd_get_section_name (abfd, s); | |
325 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
326 | { | |
327 | char *msg; | |
328 | bfd_size_type sz; | |
329 | ||
54626f1a ILT |
330 | name += sizeof ".gnu.warning." - 1; |
331 | ||
332 | /* If this is a shared object, then look up the symbol | |
333 | in the hash table. If it is there, and it is already | |
334 | been defined, then we will not be using the entry | |
335 | from this shared object, so we don't need to warn. | |
336 | FIXME: If we see the definition in a regular object | |
337 | later on, we will warn, but we shouldn't. The only | |
338 | fix is to keep track of what warnings we are supposed | |
339 | to emit, and then handle them all at the end of the | |
340 | link. */ | |
d044b40a | 341 | if (dynamic && abfd->xvec == info->hash->creator) |
54626f1a ILT |
342 | { |
343 | struct elf_link_hash_entry *h; | |
344 | ||
345 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
346 | false, false, true); | |
347 | ||
348 | /* FIXME: What about bfd_link_hash_common? */ | |
349 | if (h != NULL | |
350 | && (h->root.type == bfd_link_hash_defined | |
351 | || h->root.type == bfd_link_hash_defweak)) | |
352 | { | |
353 | /* We don't want to issue this warning. Clobber | |
354 | the section size so that the warning does not | |
355 | get copied into the output file. */ | |
356 | s->_raw_size = 0; | |
357 | continue; | |
358 | } | |
359 | } | |
360 | ||
0cb70568 ILT |
361 | sz = bfd_section_size (abfd, s); |
362 | msg = (char *) bfd_alloc (abfd, sz); | |
363 | if (msg == NULL) | |
a9713b91 | 364 | goto error_return; |
0cb70568 ILT |
365 | |
366 | if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz)) | |
367 | goto error_return; | |
368 | ||
369 | if (! (_bfd_generic_link_add_one_symbol | |
54626f1a ILT |
370 | (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg, |
371 | false, collect, (struct bfd_link_hash_entry **) NULL))) | |
0cb70568 ILT |
372 | goto error_return; |
373 | ||
374 | if (! info->relocateable) | |
375 | { | |
376 | /* Clobber the section size so that the warning does | |
377 | not get copied into the output file. */ | |
378 | s->_raw_size = 0; | |
379 | } | |
380 | } | |
381 | } | |
382 | } | |
383 | ||
d044b40a ILT |
384 | /* If this is a dynamic object, we always link against the .dynsym |
385 | symbol table, not the .symtab symbol table. The dynamic linker | |
386 | will only see the .dynsym symbol table, so there is no reason to | |
387 | look at .symtab for a dynamic object. */ | |
388 | ||
389 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
390 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
391 | else | |
392 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
393 | ||
394 | if (dynamic) | |
ede4eed4 | 395 | { |
d044b40a ILT |
396 | /* Read in any version definitions. */ |
397 | ||
398 | if (elf_dynverdef (abfd) != 0) | |
399 | { | |
400 | Elf_Internal_Shdr *verdefhdr; | |
401 | bfd_byte *dynver; | |
402 | int i; | |
403 | const Elf_External_Verdef *extverdef; | |
404 | Elf_Internal_Verdef *intverdef; | |
405 | ||
406 | verdefhdr = &elf_tdata (abfd)->dynverdef_hdr; | |
407 | elf_tdata (abfd)->verdef = | |
408 | ((Elf_Internal_Verdef *) | |
409 | bfd_zalloc (abfd, | |
410 | verdefhdr->sh_info * sizeof (Elf_Internal_Verdef))); | |
411 | if (elf_tdata (abfd)->verdef == NULL) | |
412 | goto error_return; | |
413 | ||
414 | dynver = (bfd_byte *) bfd_malloc (verdefhdr->sh_size); | |
415 | if (dynver == NULL) | |
416 | goto error_return; | |
417 | ||
418 | if (bfd_seek (abfd, verdefhdr->sh_offset, SEEK_SET) != 0 | |
d2f0374f UD |
419 | || (bfd_read ((PTR) dynver, 1, verdefhdr->sh_size, abfd) |
420 | != verdefhdr->sh_size)) | |
d044b40a ILT |
421 | goto error_return; |
422 | ||
423 | extverdef = (const Elf_External_Verdef *) dynver; | |
424 | intverdef = elf_tdata (abfd)->verdef; | |
425 | for (i = 0; i < verdefhdr->sh_info; i++, intverdef++) | |
426 | { | |
427 | const Elf_External_Verdaux *extverdaux; | |
428 | Elf_Internal_Verdaux intverdaux; | |
429 | ||
430 | _bfd_elf_swap_verdef_in (abfd, extverdef, intverdef); | |
431 | ||
432 | /* Pick up the name of the version. */ | |
433 | extverdaux = ((const Elf_External_Verdaux *) | |
d2f0374f | 434 | ((bfd_byte *) extverdef + intverdef->vd_aux)); |
d044b40a ILT |
435 | _bfd_elf_swap_verdaux_in (abfd, extverdaux, &intverdaux); |
436 | ||
437 | intverdef->vd_bfd = abfd; | |
438 | intverdef->vd_nodename = | |
439 | bfd_elf_string_from_elf_section (abfd, verdefhdr->sh_link, | |
440 | intverdaux.vda_name); | |
441 | ||
442 | extverdef = ((const Elf_External_Verdef *) | |
d2f0374f | 443 | ((bfd_byte *) extverdef + intverdef->vd_next)); |
d044b40a ILT |
444 | } |
445 | ||
446 | free (dynver); | |
447 | dynver = NULL; | |
448 | } | |
449 | ||
450 | /* Read in the symbol versions, but don't bother to convert them | |
451 | to internal format. */ | |
452 | if (elf_dynversym (abfd) != 0) | |
453 | { | |
454 | Elf_Internal_Shdr *versymhdr; | |
455 | ||
456 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
457 | extversym = (Elf_External_Versym *) bfd_malloc (hdr->sh_size); | |
458 | if (extversym == NULL) | |
459 | goto error_return; | |
460 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
461 | || (bfd_read ((PTR) extversym, 1, versymhdr->sh_size, abfd) | |
462 | != versymhdr->sh_size)) | |
463 | goto error_return; | |
464 | } | |
ede4eed4 KR |
465 | } |
466 | ||
ede4eed4 KR |
467 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
468 | ||
469 | /* The sh_info field of the symtab header tells us where the | |
470 | external symbols start. We don't care about the local symbols at | |
471 | this point. */ | |
472 | if (elf_bad_symtab (abfd)) | |
473 | { | |
474 | extsymcount = symcount; | |
475 | extsymoff = 0; | |
476 | } | |
477 | else | |
478 | { | |
479 | extsymcount = symcount - hdr->sh_info; | |
480 | extsymoff = hdr->sh_info; | |
481 | } | |
482 | ||
58142f10 ILT |
483 | buf = ((Elf_External_Sym *) |
484 | bfd_malloc (extsymcount * sizeof (Elf_External_Sym))); | |
ede4eed4 | 485 | if (buf == NULL && extsymcount != 0) |
58142f10 | 486 | goto error_return; |
ede4eed4 KR |
487 | |
488 | /* We store a pointer to the hash table entry for each external | |
489 | symbol. */ | |
490 | sym_hash = ((struct elf_link_hash_entry **) | |
491 | bfd_alloc (abfd, | |
492 | extsymcount * sizeof (struct elf_link_hash_entry *))); | |
493 | if (sym_hash == NULL) | |
a9713b91 | 494 | goto error_return; |
ede4eed4 KR |
495 | elf_sym_hashes (abfd) = sym_hash; |
496 | ||
d044b40a | 497 | if (! dynamic) |
ede4eed4 | 498 | { |
ede4eed4 KR |
499 | /* If we are creating a shared library, create all the dynamic |
500 | sections immediately. We need to attach them to something, | |
501 | so we attach them to this BFD, provided it is the right | |
502 | format. FIXME: If there are no input BFD's of the same | |
503 | format as the output, we can't make a shared library. */ | |
504 | if (info->shared | |
505 | && ! elf_hash_table (info)->dynamic_sections_created | |
506 | && abfd->xvec == info->hash->creator) | |
507 | { | |
508 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
509 | goto error_return; | |
510 | } | |
511 | } | |
512 | else | |
513 | { | |
514 | asection *s; | |
515 | boolean add_needed; | |
516 | const char *name; | |
517 | bfd_size_type oldsize; | |
518 | bfd_size_type strindex; | |
519 | ||
ede4eed4 KR |
520 | /* Find the name to use in a DT_NEEDED entry that refers to this |
521 | object. If the object has a DT_SONAME entry, we use it. | |
522 | Otherwise, if the generic linker stuck something in | |
60a49e7f ILT |
523 | elf_dt_name, we use that. Otherwise, we just use the file |
524 | name. If the generic linker put a null string into | |
525 | elf_dt_name, we don't make a DT_NEEDED entry at all, even if | |
526 | there is a DT_SONAME entry. */ | |
ede4eed4 KR |
527 | add_needed = true; |
528 | name = bfd_get_filename (abfd); | |
60a49e7f | 529 | if (elf_dt_name (abfd) != NULL) |
ede4eed4 | 530 | { |
60a49e7f | 531 | name = elf_dt_name (abfd); |
ede4eed4 KR |
532 | if (*name == '\0') |
533 | add_needed = false; | |
534 | } | |
535 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
536 | if (s != NULL) | |
537 | { | |
538 | Elf_External_Dyn *extdyn; | |
539 | Elf_External_Dyn *extdynend; | |
540 | int elfsec; | |
541 | unsigned long link; | |
542 | ||
58142f10 | 543 | dynbuf = (Elf_External_Dyn *) bfd_malloc ((size_t) s->_raw_size); |
ede4eed4 | 544 | if (dynbuf == NULL) |
58142f10 | 545 | goto error_return; |
ede4eed4 KR |
546 | |
547 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
548 | (file_ptr) 0, s->_raw_size)) | |
549 | goto error_return; | |
550 | ||
551 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
552 | if (elfsec == -1) | |
553 | goto error_return; | |
554 | link = elf_elfsections (abfd)[elfsec]->sh_link; | |
555 | ||
556 | extdyn = dynbuf; | |
557 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
558 | for (; extdyn < extdynend; extdyn++) | |
559 | { | |
560 | Elf_Internal_Dyn dyn; | |
561 | ||
562 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
60a49e7f | 563 | if (dyn.d_tag == DT_SONAME) |
ede4eed4 KR |
564 | { |
565 | name = bfd_elf_string_from_elf_section (abfd, link, | |
566 | dyn.d_un.d_val); | |
567 | if (name == NULL) | |
568 | goto error_return; | |
569 | } | |
570 | if (dyn.d_tag == DT_NEEDED) | |
571 | { | |
54406786 | 572 | struct bfd_link_needed_list *n, **pn; |
ede4eed4 KR |
573 | char *fnm, *anm; |
574 | ||
54406786 ILT |
575 | n = ((struct bfd_link_needed_list *) |
576 | bfd_alloc (abfd, sizeof (struct bfd_link_needed_list))); | |
ede4eed4 KR |
577 | fnm = bfd_elf_string_from_elf_section (abfd, link, |
578 | dyn.d_un.d_val); | |
579 | if (n == NULL || fnm == NULL) | |
580 | goto error_return; | |
581 | anm = bfd_alloc (abfd, strlen (fnm) + 1); | |
582 | if (anm == NULL) | |
583 | goto error_return; | |
584 | strcpy (anm, fnm); | |
585 | n->name = anm; | |
586 | n->by = abfd; | |
587 | n->next = NULL; | |
588 | for (pn = &elf_hash_table (info)->needed; | |
589 | *pn != NULL; | |
590 | pn = &(*pn)->next) | |
591 | ; | |
592 | *pn = n; | |
593 | } | |
594 | } | |
595 | ||
596 | free (dynbuf); | |
597 | dynbuf = NULL; | |
598 | } | |
599 | ||
600 | /* We do not want to include any of the sections in a dynamic | |
601 | object in the output file. We hack by simply clobbering the | |
602 | list of sections in the BFD. This could be handled more | |
603 | cleanly by, say, a new section flag; the existing | |
604 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
605 | still implies that the section takes up space in the output | |
606 | file. */ | |
607 | abfd->sections = NULL; | |
010d9f2d | 608 | abfd->section_count = 0; |
ede4eed4 KR |
609 | |
610 | /* If this is the first dynamic object found in the link, create | |
611 | the special sections required for dynamic linking. */ | |
612 | if (! elf_hash_table (info)->dynamic_sections_created) | |
613 | { | |
614 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
615 | goto error_return; | |
616 | } | |
617 | ||
618 | if (add_needed) | |
619 | { | |
620 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
621 | oldsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
622 | strindex = _bfd_stringtab_add (elf_hash_table (info)->dynstr, name, | |
623 | true, false); | |
624 | if (strindex == (bfd_size_type) -1) | |
625 | goto error_return; | |
626 | ||
627 | if (oldsize == _bfd_stringtab_size (elf_hash_table (info)->dynstr)) | |
628 | { | |
629 | asection *sdyn; | |
630 | Elf_External_Dyn *dyncon, *dynconend; | |
631 | ||
632 | /* The hash table size did not change, which means that | |
633 | the dynamic object name was already entered. If we | |
634 | have already included this dynamic object in the | |
635 | link, just ignore it. There is no reason to include | |
636 | a particular dynamic object more than once. */ | |
637 | sdyn = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
638 | ".dynamic"); | |
639 | BFD_ASSERT (sdyn != NULL); | |
640 | ||
641 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
642 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
643 | sdyn->_raw_size); | |
644 | for (; dyncon < dynconend; dyncon++) | |
645 | { | |
646 | Elf_Internal_Dyn dyn; | |
647 | ||
648 | elf_swap_dyn_in (elf_hash_table (info)->dynobj, dyncon, | |
649 | &dyn); | |
650 | if (dyn.d_tag == DT_NEEDED | |
651 | && dyn.d_un.d_val == strindex) | |
652 | { | |
653 | if (buf != NULL) | |
654 | free (buf); | |
d044b40a ILT |
655 | if (extversym != NULL) |
656 | free (extversym); | |
ede4eed4 KR |
657 | return true; |
658 | } | |
659 | } | |
660 | } | |
661 | ||
662 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
663 | goto error_return; | |
664 | } | |
60a49e7f ILT |
665 | |
666 | /* Save the SONAME, if there is one, because sometimes the | |
667 | linker emulation code will need to know it. */ | |
668 | if (*name == '\0') | |
669 | name = bfd_get_filename (abfd); | |
670 | elf_dt_name (abfd) = name; | |
ede4eed4 KR |
671 | } |
672 | ||
673 | if (bfd_seek (abfd, | |
674 | hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym), | |
675 | SEEK_SET) != 0 | |
676 | || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd) | |
677 | != extsymcount * sizeof (Elf_External_Sym))) | |
678 | goto error_return; | |
679 | ||
680 | weaks = NULL; | |
681 | ||
e549b1d2 | 682 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
ede4eed4 | 683 | esymend = buf + extsymcount; |
d044b40a ILT |
684 | for (esym = buf; |
685 | esym < esymend; | |
686 | esym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
ede4eed4 KR |
687 | { |
688 | Elf_Internal_Sym sym; | |
689 | int bind; | |
690 | bfd_vma value; | |
691 | asection *sec; | |
692 | flagword flags; | |
693 | const char *name; | |
0cb70568 | 694 | struct elf_link_hash_entry *h; |
ede4eed4 | 695 | boolean definition; |
ee9f09cd | 696 | boolean size_change_ok, type_change_ok; |
452a5efb | 697 | boolean new_weakdef; |
ede4eed4 KR |
698 | |
699 | elf_swap_symbol_in (abfd, esym, &sym); | |
700 | ||
701 | flags = BSF_NO_FLAGS; | |
702 | sec = NULL; | |
703 | value = sym.st_value; | |
704 | *sym_hash = NULL; | |
705 | ||
706 | bind = ELF_ST_BIND (sym.st_info); | |
707 | if (bind == STB_LOCAL) | |
708 | { | |
709 | /* This should be impossible, since ELF requires that all | |
710 | global symbols follow all local symbols, and that sh_info | |
711 | point to the first global symbol. Unfortunatealy, Irix 5 | |
712 | screws this up. */ | |
713 | continue; | |
714 | } | |
715 | else if (bind == STB_GLOBAL) | |
716 | { | |
717 | if (sym.st_shndx != SHN_UNDEF | |
718 | && sym.st_shndx != SHN_COMMON) | |
719 | flags = BSF_GLOBAL; | |
720 | else | |
721 | flags = 0; | |
722 | } | |
723 | else if (bind == STB_WEAK) | |
724 | flags = BSF_WEAK; | |
725 | else | |
726 | { | |
727 | /* Leave it up to the processor backend. */ | |
728 | } | |
729 | ||
730 | if (sym.st_shndx == SHN_UNDEF) | |
731 | sec = bfd_und_section_ptr; | |
732 | else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE) | |
733 | { | |
734 | sec = section_from_elf_index (abfd, sym.st_shndx); | |
735 | if (sec != NULL) | |
736 | value -= sec->vma; | |
737 | else | |
738 | sec = bfd_abs_section_ptr; | |
739 | } | |
740 | else if (sym.st_shndx == SHN_ABS) | |
741 | sec = bfd_abs_section_ptr; | |
742 | else if (sym.st_shndx == SHN_COMMON) | |
743 | { | |
744 | sec = bfd_com_section_ptr; | |
745 | /* What ELF calls the size we call the value. What ELF | |
746 | calls the value we call the alignment. */ | |
747 | value = sym.st_size; | |
748 | } | |
749 | else | |
750 | { | |
751 | /* Leave it up to the processor backend. */ | |
752 | } | |
753 | ||
754 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name); | |
755 | if (name == (const char *) NULL) | |
756 | goto error_return; | |
757 | ||
758 | if (add_symbol_hook) | |
759 | { | |
760 | if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec, | |
761 | &value)) | |
762 | goto error_return; | |
763 | ||
764 | /* The hook function sets the name to NULL if this symbol | |
765 | should be skipped for some reason. */ | |
766 | if (name == (const char *) NULL) | |
767 | continue; | |
768 | } | |
769 | ||
770 | /* Sanity check that all possibilities were handled. */ | |
771 | if (sec == (asection *) NULL) | |
772 | { | |
773 | bfd_set_error (bfd_error_bad_value); | |
774 | goto error_return; | |
775 | } | |
776 | ||
777 | if (bfd_is_und_section (sec) | |
778 | || bfd_is_com_section (sec)) | |
779 | definition = false; | |
780 | else | |
781 | definition = true; | |
782 | ||
ee9f09cd | 783 | size_change_ok = false; |
5b3b9ff6 | 784 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; |
ede4eed4 KR |
785 | if (info->hash->creator->flavour == bfd_target_elf_flavour) |
786 | { | |
d044b40a ILT |
787 | Elf_Internal_Versym iver; |
788 | int vernum; | |
789 | boolean override; | |
790 | ||
791 | if (ever != NULL) | |
792 | { | |
793 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
794 | vernum = iver.vs_vers & VERSYM_VERSION; | |
795 | ||
796 | /* If this is a hidden symbol, or if it is not version | |
797 | 1, we append the version name to the symbol name. | |
798 | However, we do not modify a non-hidden absolute | |
799 | symbol, because it might be the version symbol | |
800 | itself. FIXME: What if it isn't? */ | |
801 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 | |
802 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
803 | { | |
804 | const char *verstr; | |
805 | int namelen, newlen; | |
806 | char *newname, *p; | |
807 | ||
e549b1d2 ILT |
808 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) |
809 | { | |
810 | (*_bfd_error_handler) | |
811 | ("%s: %s: invalid version %d (max %d)", | |
812 | abfd->filename, name, vernum, | |
813 | elf_tdata (abfd)->dynverdef_hdr.sh_info); | |
814 | bfd_set_error (bfd_error_bad_value); | |
815 | goto error_return; | |
816 | } | |
817 | else if (vernum > 1) | |
d044b40a ILT |
818 | verstr = elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; |
819 | else | |
820 | verstr = ""; | |
821 | ||
822 | namelen = strlen (name); | |
823 | newlen = namelen + strlen (verstr) + 2; | |
824 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
825 | ++newlen; | |
826 | ||
827 | newname = (char *) bfd_alloc (abfd, newlen); | |
828 | if (newname == NULL) | |
829 | goto error_return; | |
830 | strcpy (newname, name); | |
831 | p = newname + namelen; | |
832 | *p++ = ELF_VER_CHR; | |
833 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
834 | *p++ = ELF_VER_CHR; | |
835 | strcpy (p, verstr); | |
836 | ||
837 | name = newname; | |
838 | } | |
839 | } | |
840 | ||
ede4eed4 KR |
841 | /* We need to look up the symbol now in order to get some of |
842 | the dynamic object handling right. We pass the hash | |
843 | table entry in to _bfd_generic_link_add_one_symbol so | |
844 | that it does not have to look it up again. */ | |
8881b321 ILT |
845 | if (! bfd_is_und_section (sec)) |
846 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
847 | true, false, false); | |
848 | else | |
849 | h = ((struct elf_link_hash_entry *) | |
850 | bfd_wrapped_link_hash_lookup (abfd, info, name, true, | |
851 | false, false)); | |
ede4eed4 KR |
852 | if (h == NULL) |
853 | goto error_return; | |
854 | *sym_hash = h; | |
855 | ||
869b7d80 ILT |
856 | if (h->root.type == bfd_link_hash_new) |
857 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
858 | ||
0cb70568 ILT |
859 | while (h->root.type == bfd_link_hash_indirect |
860 | || h->root.type == bfd_link_hash_warning) | |
861 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
862 | ||
ee9f09cd | 863 | /* It's OK to change the type if it used to be a weak |
37897db0 ILT |
864 | definition, or if the current definition is weak (and |
865 | hence might be ignored). */ | |
5b3b9ff6 | 866 | if (h->root.type == bfd_link_hash_defweak |
37897db0 ILT |
867 | || h->root.type == bfd_link_hash_undefweak |
868 | || bind == STB_WEAK) | |
5b3b9ff6 | 869 | type_change_ok = true; |
ee9f09cd ILT |
870 | |
871 | /* It's OK to change the size if it used to be a weak | |
872 | definition, or if it used to be undefined, or if we will | |
5b3b9ff6 ILT |
873 | be overriding an old definition. */ |
874 | if (type_change_ok | |
875 | || h->root.type == bfd_link_hash_undefined) | |
876 | size_change_ok = true; | |
8235c112 | 877 | |
d044b40a ILT |
878 | override = false; |
879 | ||
ede4eed4 KR |
880 | /* If we are looking at a dynamic object, and this is a |
881 | definition, we need to see if it has already been defined | |
882 | by some other object. If it has, we want to use the | |
883 | existing definition, and we do not want to report a | |
884 | multiple symbol definition error; we do this by | |
4596421b ILT |
885 | clobbering sec to be bfd_und_section_ptr. We treat a |
886 | common symbol as a definition if the symbol in the shared | |
887 | library is a function, since common symbols always | |
888 | represent variables; this can cause confusion in | |
889 | principle, but any such confusion would seem to indicate | |
890 | an erroneous program or shared library. */ | |
ede4eed4 KR |
891 | if (dynamic && definition) |
892 | { | |
893 | if (h->root.type == bfd_link_hash_defined | |
3d7c42c9 ILT |
894 | || h->root.type == bfd_link_hash_defweak |
895 | || (h->root.type == bfd_link_hash_common | |
4596421b ILT |
896 | && (bind == STB_WEAK |
897 | || ELF_ST_TYPE (sym.st_info) == STT_FUNC))) | |
3d7c42c9 | 898 | { |
d044b40a | 899 | override = true; |
3d7c42c9 ILT |
900 | sec = bfd_und_section_ptr; |
901 | definition = false; | |
ee9f09cd | 902 | size_change_ok = true; |
4596421b ILT |
903 | if (h->root.type == bfd_link_hash_common) |
904 | type_change_ok = true; | |
3d7c42c9 | 905 | } |
ede4eed4 KR |
906 | } |
907 | ||
908 | /* Similarly, if we are not looking at a dynamic object, and | |
909 | we have a definition, we want to override any definition | |
910 | we may have from a dynamic object. Symbols from regular | |
911 | files always take precedence over symbols from dynamic | |
912 | objects, even if they are defined after the dynamic | |
913 | object in the link. */ | |
914 | if (! dynamic | |
4596421b ILT |
915 | && (definition |
916 | || (bfd_is_com_section (sec) | |
917 | && (h->root.type == bfd_link_hash_defweak | |
918 | || h->type == STT_FUNC))) | |
ede4eed4 KR |
919 | && (h->root.type == bfd_link_hash_defined |
920 | || h->root.type == bfd_link_hash_defweak) | |
921 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
d044b40a | 922 | && (h->root.u.def.section->owner->flags & DYNAMIC) != 0) |
ede4eed4 | 923 | { |
d044b40a | 924 | override = true; |
ede4eed4 KR |
925 | /* Change the hash table entry to undefined, and let |
926 | _bfd_generic_link_add_one_symbol do the right thing | |
927 | with the new definition. */ | |
928 | h->root.type = bfd_link_hash_undefined; | |
929 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
ee9f09cd | 930 | size_change_ok = true; |
4596421b ILT |
931 | if (bfd_is_com_section (sec)) |
932 | type_change_ok = true; | |
d044b40a ILT |
933 | |
934 | /* This union may have been set to be non-NULL when this | |
935 | symbol was seen in a dynamic object. We must force | |
936 | the union to be NULL, so that it is correct for a | |
937 | regular symbol. */ | |
938 | h->verinfo.vertree = NULL; | |
ede4eed4 | 939 | } |
d044b40a ILT |
940 | |
941 | if (ever != NULL | |
942 | && ! override | |
943 | && vernum > 1 | |
944 | && (h->verinfo.verdef == NULL || definition)) | |
945 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
ede4eed4 KR |
946 | } |
947 | ||
948 | if (! (_bfd_generic_link_add_one_symbol | |
949 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
950 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
951 | goto error_return; | |
952 | ||
0cb70568 ILT |
953 | h = *sym_hash; |
954 | while (h->root.type == bfd_link_hash_indirect | |
955 | || h->root.type == bfd_link_hash_warning) | |
956 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
957 | *sym_hash = h; | |
958 | ||
452a5efb | 959 | new_weakdef = false; |
ede4eed4 KR |
960 | if (dynamic |
961 | && definition | |
962 | && (flags & BSF_WEAK) != 0 | |
963 | && ELF_ST_TYPE (sym.st_info) != STT_FUNC | |
964 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
0cb70568 | 965 | && h->weakdef == NULL) |
ede4eed4 KR |
966 | { |
967 | /* Keep a list of all weak defined non function symbols from | |
968 | a dynamic object, using the weakdef field. Later in this | |
969 | function we will set the weakdef field to the correct | |
970 | value. We only put non-function symbols from dynamic | |
971 | objects on this list, because that happens to be the only | |
972 | time we need to know the normal symbol corresponding to a | |
973 | weak symbol, and the information is time consuming to | |
974 | figure out. If the weakdef field is not already NULL, | |
975 | then this symbol was already defined by some previous | |
976 | dynamic object, and we will be using that previous | |
977 | definition anyhow. */ | |
978 | ||
0cb70568 ILT |
979 | h->weakdef = weaks; |
980 | weaks = h; | |
452a5efb | 981 | new_weakdef = true; |
ede4eed4 KR |
982 | } |
983 | ||
984 | /* Get the alignment of a common symbol. */ | |
985 | if (sym.st_shndx == SHN_COMMON | |
0cb70568 ILT |
986 | && h->root.type == bfd_link_hash_common) |
987 | h->root.u.c.p->alignment_power = bfd_log2 (sym.st_value); | |
ede4eed4 KR |
988 | |
989 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
990 | { | |
991 | int old_flags; | |
992 | boolean dynsym; | |
993 | int new_flag; | |
994 | ||
995 | /* Remember the symbol size and type. */ | |
3d7c42c9 ILT |
996 | if (sym.st_size != 0 |
997 | && (definition || h->size == 0)) | |
ede4eed4 | 998 | { |
ee9f09cd | 999 | if (h->size != 0 && h->size != sym.st_size && ! size_change_ok) |
3d7c42c9 ILT |
1000 | (*_bfd_error_handler) |
1001 | ("Warning: size of symbol `%s' changed from %lu to %lu in %s", | |
1002 | name, (unsigned long) h->size, (unsigned long) sym.st_size, | |
1003 | bfd_get_filename (abfd)); | |
1004 | ||
ede4eed4 KR |
1005 | h->size = sym.st_size; |
1006 | } | |
3d7c42c9 ILT |
1007 | if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE |
1008 | && (definition || h->type == STT_NOTYPE)) | |
ede4eed4 | 1009 | { |
3d7c42c9 | 1010 | if (h->type != STT_NOTYPE |
8235c112 | 1011 | && h->type != ELF_ST_TYPE (sym.st_info) |
ee9f09cd | 1012 | && ! type_change_ok) |
3d7c42c9 ILT |
1013 | (*_bfd_error_handler) |
1014 | ("Warning: type of symbol `%s' changed from %d to %d in %s", | |
1015 | name, h->type, ELF_ST_TYPE (sym.st_info), | |
1016 | bfd_get_filename (abfd)); | |
1017 | ||
ede4eed4 KR |
1018 | h->type = ELF_ST_TYPE (sym.st_info); |
1019 | } | |
1020 | ||
6c02f1a0 ILT |
1021 | if (sym.st_other != 0 |
1022 | && (definition || h->other == 0)) | |
1023 | h->other = sym.st_other; | |
1024 | ||
ede4eed4 KR |
1025 | /* Set a flag in the hash table entry indicating the type of |
1026 | reference or definition we just found. Keep a count of | |
1027 | the number of dynamic symbols we find. A dynamic symbol | |
1028 | is one which is referenced or defined by both a regular | |
440f3914 | 1029 | object and a shared object. */ |
ede4eed4 KR |
1030 | old_flags = h->elf_link_hash_flags; |
1031 | dynsym = false; | |
1032 | if (! dynamic) | |
1033 | { | |
1034 | if (! definition) | |
1035 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1036 | else | |
1037 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
1038 | if (info->shared | |
1039 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1040 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
1041 | dynsym = true; | |
1042 | } | |
1043 | else | |
1044 | { | |
1045 | if (! definition) | |
1046 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1047 | else | |
1048 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
0db6249c | 1049 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR |
1c4794f5 ILT |
1050 | | ELF_LINK_HASH_REF_REGULAR)) != 0 |
1051 | || (h->weakdef != NULL | |
440f3914 ILT |
1052 | && ! new_weakdef |
1053 | && h->weakdef->dynindx != -1)) | |
ede4eed4 KR |
1054 | dynsym = true; |
1055 | } | |
1056 | ||
1057 | h->elf_link_hash_flags |= new_flag; | |
d044b40a ILT |
1058 | |
1059 | /* If this symbol has a version, and it is the default | |
1060 | version, we create an indirect symbol from the default | |
1061 | name to the fully decorated name. This will cause | |
1062 | external references which do not specify a version to be | |
1063 | bound to this version of the symbol. */ | |
1064 | if (definition) | |
1065 | { | |
1066 | char *p; | |
1067 | ||
1068 | p = strchr (name, ELF_VER_CHR); | |
1069 | if (p != NULL && p[1] == ELF_VER_CHR) | |
1070 | { | |
1071 | char *shortname; | |
52c92c7f | 1072 | struct elf_link_hash_entry *hold; |
d044b40a ILT |
1073 | |
1074 | shortname = bfd_hash_allocate (&info->hash->table, | |
1075 | p - name + 1); | |
1076 | if (shortname == NULL) | |
1077 | goto error_return; | |
1078 | strncpy (shortname, name, p - name); | |
1079 | shortname[p - name] = '\0'; | |
1080 | ||
52c92c7f ILT |
1081 | /* First look to see if we have an existing symbol |
1082 | with this name. */ | |
1083 | hold = elf_link_hash_lookup (elf_hash_table (info), | |
1084 | shortname, false, false, | |
1085 | false); | |
1086 | ||
1087 | /* If we are looking at a normal object, and the | |
1088 | symbol was seen in a shared object, clobber the | |
1089 | definition in the shared object. */ | |
1090 | if (hold != NULL | |
1091 | && ! dynamic | |
1092 | && (hold->root.type == bfd_link_hash_defined | |
1093 | || hold->root.type == bfd_link_hash_defweak) | |
1094 | && (hold->elf_link_hash_flags | |
1095 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1096 | && ((hold->root.u.def.section->owner->flags & DYNAMIC) | |
1097 | != 0)) | |
1098 | { | |
1099 | /* Change the hash table entry to undefined, so | |
1100 | that _bfd_generic_link_add_one_symbol will do | |
1101 | the right thing. */ | |
1102 | hold->root.type = bfd_link_hash_undefined; | |
1103 | hold->root.u.undef.abfd = | |
1104 | hold->root.u.def.section->owner; | |
1105 | hold->verinfo.vertree = NULL; | |
1106 | hold = NULL; | |
1107 | } | |
d044b40a | 1108 | |
52c92c7f ILT |
1109 | /* If we are looking at a shared object, and we have |
1110 | already seen this symbol defined elsewhere, then | |
1111 | don't try to define it again. */ | |
1112 | if (hold != NULL | |
1113 | && dynamic | |
1114 | && (hold->root.type == bfd_link_hash_defined | |
1115 | || hold->root.type == bfd_link_hash_defweak | |
1116 | || hold->root.type == bfd_link_hash_indirect | |
1117 | || (hold->root.type == bfd_link_hash_common | |
1118 | && (bind == STB_WEAK | |
1119 | || ELF_ST_TYPE (sym.st_info) == STT_FUNC)))) | |
1120 | { | |
1121 | /* Don't add an indirect symbol. */ | |
1122 | } | |
1123 | else | |
d6bfcdb5 | 1124 | { |
52c92c7f ILT |
1125 | struct elf_link_hash_entry *hi; |
1126 | ||
1127 | hi = NULL; | |
1128 | if (! (_bfd_generic_link_add_one_symbol | |
1129 | (info, abfd, shortname, BSF_INDIRECT, | |
1130 | bfd_ind_section_ptr, (bfd_vma) 0, name, false, | |
1131 | collect, (struct bfd_link_hash_entry **) &hi))) | |
1132 | goto error_return; | |
1133 | ||
1134 | /* If there is a duplicate definition somewhere, | |
1135 | then HI may not point to an indirect symbol. | |
1136 | We will have reported an error to the user in | |
1137 | that case. */ | |
1138 | ||
1139 | if (hi->root.type == bfd_link_hash_indirect) | |
1140 | { | |
1141 | hi->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
e549b1d2 ILT |
1142 | |
1143 | /* If the symbol became indirect, then we | |
1144 | assume that we have not seen a definition | |
1145 | before. */ | |
1146 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1147 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1148 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1149 | == 0); | |
1150 | ||
1151 | /* Copy down any references that we may have | |
1152 | already seen to the symbol which just | |
1153 | became indirect. */ | |
1154 | h->elf_link_hash_flags |= | |
1155 | (hi->elf_link_hash_flags | |
1156 | & (ELF_LINK_HASH_REF_DYNAMIC | |
1157 | | ELF_LINK_HASH_REF_REGULAR)); | |
1158 | ||
1159 | /* Copy over the global table offset entry. | |
1160 | This may have been already set up by a | |
1161 | check_relocs routine. */ | |
1162 | if (h->got_offset == (bfd_vma) -1) | |
1163 | { | |
1164 | h->got_offset = hi->got_offset; | |
1165 | hi->got_offset = (bfd_vma) -1; | |
1166 | } | |
1167 | BFD_ASSERT (hi->got_offset == (bfd_vma) -1); | |
1168 | ||
1169 | if (h->dynindx == -1) | |
1170 | { | |
1171 | h->dynindx = hi->dynindx; | |
1172 | h->dynstr_index = hi->dynstr_index; | |
1173 | hi->dynindx = -1; | |
1174 | hi->dynstr_index = 0; | |
1175 | } | |
1176 | BFD_ASSERT (hi->dynindx == -1); | |
1177 | ||
1178 | /* FIXME: There may be other information to | |
1179 | copy over for particular targets. */ | |
1180 | ||
1181 | /* See if the new flags lead us to realize | |
1182 | that the symbol must be dynamic. */ | |
1183 | if (! dynsym) | |
1184 | { | |
1185 | if (! dynamic) | |
1186 | { | |
1187 | if (info->shared | |
1188 | || ((hi->elf_link_hash_flags | |
1189 | & ELF_LINK_HASH_REF_DYNAMIC) | |
1190 | != 0)) | |
1191 | dynsym = true; | |
1192 | } | |
1193 | else | |
1194 | { | |
1195 | if ((hi->elf_link_hash_flags | |
1196 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1197 | dynsym = true; | |
1198 | } | |
1199 | } | |
52c92c7f | 1200 | } |
d6bfcdb5 ILT |
1201 | } |
1202 | ||
1203 | /* We also need to define an indirection from the | |
1204 | nondefault version of the symbol. */ | |
1205 | ||
1206 | shortname = bfd_hash_allocate (&info->hash->table, | |
1207 | strlen (name)); | |
1208 | if (shortname == NULL) | |
1209 | goto error_return; | |
1210 | strncpy (shortname, name, p - name); | |
1211 | strcpy (shortname + (p - name), p + 1); | |
1212 | ||
52c92c7f ILT |
1213 | /* First look to see if we have an existing symbol |
1214 | with this name. */ | |
1215 | hold = elf_link_hash_lookup (elf_hash_table (info), | |
1216 | shortname, false, false, | |
1217 | false); | |
1218 | ||
1219 | /* If we are looking at a normal object, and the | |
1220 | symbol was seen in a shared object, clobber the | |
1221 | definition in the shared object. */ | |
1222 | if (hold != NULL | |
1223 | && ! dynamic | |
1224 | && (hold->root.type == bfd_link_hash_defined | |
1225 | || hold->root.type == bfd_link_hash_defweak) | |
1226 | && (hold->elf_link_hash_flags | |
1227 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1228 | && ((hold->root.u.def.section->owner->flags & DYNAMIC) | |
1229 | != 0)) | |
1230 | { | |
1231 | /* Change the hash table entry to undefined, so | |
1232 | that _bfd_generic_link_add_one_symbol will do | |
1233 | the right thing. */ | |
1234 | hold->root.type = bfd_link_hash_undefined; | |
1235 | hold->root.u.undef.abfd = | |
1236 | hold->root.u.def.section->owner; | |
1237 | hold->verinfo.vertree = NULL; | |
1238 | hold = NULL; | |
1239 | } | |
d6bfcdb5 | 1240 | |
52c92c7f ILT |
1241 | /* If we are looking at a shared object, and we have |
1242 | already seen this symbol defined elsewhere, then | |
1243 | don't try to define it again. */ | |
1244 | if (hold != NULL | |
1245 | && dynamic | |
1246 | && (hold->root.type == bfd_link_hash_defined | |
1247 | || hold->root.type == bfd_link_hash_defweak | |
1248 | || hold->root.type == bfd_link_hash_indirect | |
1249 | || (hold->root.type == bfd_link_hash_common | |
1250 | && (bind == STB_WEAK | |
1251 | || ELF_ST_TYPE (sym.st_info) == STT_FUNC)))) | |
d6bfcdb5 | 1252 | { |
52c92c7f ILT |
1253 | /* Don't add an indirect symbol. */ |
1254 | } | |
1255 | else | |
1256 | { | |
1257 | struct elf_link_hash_entry *hi; | |
1258 | ||
1259 | hi = NULL; | |
1260 | if (! (_bfd_generic_link_add_one_symbol | |
1261 | (info, abfd, shortname, BSF_INDIRECT, | |
1262 | bfd_ind_section_ptr, (bfd_vma) 0, name, false, | |
1263 | collect, (struct bfd_link_hash_entry **) &hi))) | |
1264 | goto error_return; | |
1265 | ||
1266 | /* If there is a duplicate definition somewhere, | |
1267 | then HI may not point to an indirect symbol. | |
1268 | We will have reported an error to the user in | |
1269 | that case. */ | |
1270 | ||
1271 | if (hi->root.type == bfd_link_hash_indirect) | |
1272 | { | |
1273 | hi->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
e549b1d2 ILT |
1274 | |
1275 | /* If the symbol became indirect, then we | |
1276 | assume that we have not seen a definition | |
1277 | before. */ | |
1278 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1279 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1280 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1281 | == 0); | |
1282 | ||
1283 | /* Copy down any references that we may have | |
1284 | already seen to the symbol which just | |
1285 | became indirect. */ | |
1286 | h->elf_link_hash_flags |= | |
1287 | (hi->elf_link_hash_flags | |
1288 | & (ELF_LINK_HASH_REF_DYNAMIC | |
1289 | | ELF_LINK_HASH_REF_REGULAR)); | |
1290 | ||
1291 | /* Copy over the global table offset entry. | |
1292 | This may have been already set up by a | |
1293 | check_relocs routine. */ | |
1294 | if (h->got_offset == (bfd_vma) -1) | |
1295 | { | |
1296 | h->got_offset = hi->got_offset; | |
1297 | hi->got_offset = (bfd_vma) -1; | |
1298 | } | |
1299 | BFD_ASSERT (hi->got_offset == (bfd_vma) -1); | |
1300 | ||
1301 | if (h->dynindx == -1) | |
1302 | { | |
1303 | h->dynindx = hi->dynindx; | |
1304 | h->dynstr_index = hi->dynstr_index; | |
1305 | hi->dynindx = -1; | |
1306 | hi->dynstr_index = 0; | |
1307 | } | |
1308 | BFD_ASSERT (hi->dynindx == -1); | |
1309 | ||
1310 | /* FIXME: There may be other information to | |
1311 | copy over for particular targets. */ | |
1312 | ||
1313 | /* See if the new flags lead us to realize | |
1314 | that the symbol must be dynamic. */ | |
1315 | if (! dynsym) | |
1316 | { | |
1317 | if (! dynamic) | |
1318 | { | |
1319 | if (info->shared | |
1320 | || ((hi->elf_link_hash_flags | |
1321 | & ELF_LINK_HASH_REF_DYNAMIC) | |
1322 | != 0)) | |
1323 | dynsym = true; | |
1324 | } | |
1325 | else | |
1326 | { | |
1327 | if ((hi->elf_link_hash_flags | |
1328 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1329 | dynsym = true; | |
1330 | } | |
1331 | } | |
52c92c7f | 1332 | } |
d6bfcdb5 | 1333 | } |
d044b40a ILT |
1334 | } |
1335 | } | |
1336 | ||
ede4eed4 KR |
1337 | if (dynsym && h->dynindx == -1) |
1338 | { | |
1339 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1340 | goto error_return; | |
452a5efb ILT |
1341 | if (h->weakdef != NULL |
1342 | && ! new_weakdef | |
1343 | && h->weakdef->dynindx == -1) | |
1344 | { | |
1345 | if (! _bfd_elf_link_record_dynamic_symbol (info, | |
1346 | h->weakdef)) | |
1347 | goto error_return; | |
1348 | } | |
ede4eed4 KR |
1349 | } |
1350 | } | |
1351 | } | |
1352 | ||
1353 | /* Now set the weakdefs field correctly for all the weak defined | |
1354 | symbols we found. The only way to do this is to search all the | |
1355 | symbols. Since we only need the information for non functions in | |
1356 | dynamic objects, that's the only time we actually put anything on | |
1357 | the list WEAKS. We need this information so that if a regular | |
1358 | object refers to a symbol defined weakly in a dynamic object, the | |
1359 | real symbol in the dynamic object is also put in the dynamic | |
1360 | symbols; we also must arrange for both symbols to point to the | |
1361 | same memory location. We could handle the general case of symbol | |
1362 | aliasing, but a general symbol alias can only be generated in | |
1363 | assembler code, handling it correctly would be very time | |
1364 | consuming, and other ELF linkers don't handle general aliasing | |
1365 | either. */ | |
1366 | while (weaks != NULL) | |
1367 | { | |
1368 | struct elf_link_hash_entry *hlook; | |
1369 | asection *slook; | |
1370 | bfd_vma vlook; | |
1371 | struct elf_link_hash_entry **hpp; | |
1372 | struct elf_link_hash_entry **hppend; | |
1373 | ||
1374 | hlook = weaks; | |
1375 | weaks = hlook->weakdef; | |
1376 | hlook->weakdef = NULL; | |
1377 | ||
1378 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
1379 | || hlook->root.type == bfd_link_hash_defweak | |
1380 | || hlook->root.type == bfd_link_hash_common | |
1381 | || hlook->root.type == bfd_link_hash_indirect); | |
1382 | slook = hlook->root.u.def.section; | |
1383 | vlook = hlook->root.u.def.value; | |
1384 | ||
1385 | hpp = elf_sym_hashes (abfd); | |
1386 | hppend = hpp + extsymcount; | |
1387 | for (; hpp < hppend; hpp++) | |
1388 | { | |
1389 | struct elf_link_hash_entry *h; | |
1390 | ||
1391 | h = *hpp; | |
1392 | if (h != NULL && h != hlook | |
d2bb6c79 | 1393 | && h->root.type == bfd_link_hash_defined |
ede4eed4 KR |
1394 | && h->root.u.def.section == slook |
1395 | && h->root.u.def.value == vlook) | |
1396 | { | |
1397 | hlook->weakdef = h; | |
1398 | ||
1399 | /* If the weak definition is in the list of dynamic | |
1400 | symbols, make sure the real definition is put there | |
1401 | as well. */ | |
1402 | if (hlook->dynindx != -1 | |
1403 | && h->dynindx == -1) | |
1404 | { | |
1405 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1406 | goto error_return; | |
1407 | } | |
1408 | ||
440f3914 ILT |
1409 | /* If the real definition is in the list of dynamic |
1410 | symbols, make sure the weak definition is put there | |
1411 | as well. If we don't do this, then the dynamic | |
1412 | loader might not merge the entries for the real | |
1413 | definition and the weak definition. */ | |
1414 | if (h->dynindx != -1 | |
1415 | && hlook->dynindx == -1) | |
1416 | { | |
1417 | if (! _bfd_elf_link_record_dynamic_symbol (info, hlook)) | |
1418 | goto error_return; | |
1419 | } | |
1420 | ||
ede4eed4 KR |
1421 | break; |
1422 | } | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | if (buf != NULL) | |
1427 | { | |
1428 | free (buf); | |
1429 | buf = NULL; | |
1430 | } | |
1431 | ||
d044b40a ILT |
1432 | if (extversym != NULL) |
1433 | { | |
1434 | free (extversym); | |
1435 | extversym = NULL; | |
1436 | } | |
1437 | ||
ede4eed4 KR |
1438 | /* If this object is the same format as the output object, and it is |
1439 | not a shared library, then let the backend look through the | |
1440 | relocs. | |
1441 | ||
1442 | This is required to build global offset table entries and to | |
1443 | arrange for dynamic relocs. It is not required for the | |
1444 | particular common case of linking non PIC code, even when linking | |
1445 | against shared libraries, but unfortunately there is no way of | |
1446 | knowing whether an object file has been compiled PIC or not. | |
1447 | Looking through the relocs is not particularly time consuming. | |
1448 | The problem is that we must either (1) keep the relocs in memory, | |
1449 | which causes the linker to require additional runtime memory or | |
1450 | (2) read the relocs twice from the input file, which wastes time. | |
1451 | This would be a good case for using mmap. | |
1452 | ||
1453 | I have no idea how to handle linking PIC code into a file of a | |
1454 | different format. It probably can't be done. */ | |
1455 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
1456 | if (! dynamic | |
1457 | && abfd->xvec == info->hash->creator | |
1458 | && check_relocs != NULL) | |
1459 | { | |
1460 | asection *o; | |
1461 | ||
1462 | for (o = abfd->sections; o != NULL; o = o->next) | |
1463 | { | |
1464 | Elf_Internal_Rela *internal_relocs; | |
1465 | boolean ok; | |
1466 | ||
1467 | if ((o->flags & SEC_RELOC) == 0 | |
1468 | || o->reloc_count == 0) | |
ede4eed4 KR |
1469 | continue; |
1470 | ||
c86158e5 ILT |
1471 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) |
1472 | (abfd, o, (PTR) NULL, | |
1473 | (Elf_Internal_Rela *) NULL, | |
1474 | info->keep_memory)); | |
ede4eed4 KR |
1475 | if (internal_relocs == NULL) |
1476 | goto error_return; | |
1477 | ||
1478 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
1479 | ||
1480 | if (! info->keep_memory) | |
1481 | free (internal_relocs); | |
1482 | ||
1483 | if (! ok) | |
1484 | goto error_return; | |
1485 | } | |
1486 | } | |
1487 | ||
1726b8f0 ILT |
1488 | /* If this is a non-traditional, non-relocateable link, try to |
1489 | optimize the handling of the .stab/.stabstr sections. */ | |
1490 | if (! dynamic | |
1491 | && ! info->relocateable | |
1492 | && ! info->traditional_format | |
1493 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
1494 | && (info->strip != strip_all && info->strip != strip_debugger)) | |
1495 | { | |
1496 | asection *stab, *stabstr; | |
1497 | ||
1498 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
1499 | if (stab != NULL) | |
1500 | { | |
1501 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
1502 | ||
1503 | if (stabstr != NULL) | |
1504 | { | |
1505 | struct bfd_elf_section_data *secdata; | |
1506 | ||
1507 | secdata = elf_section_data (stab); | |
1508 | if (! _bfd_link_section_stabs (abfd, | |
1509 | &elf_hash_table (info)->stab_info, | |
1510 | stab, stabstr, | |
1511 | &secdata->stab_info)) | |
1512 | goto error_return; | |
1513 | } | |
1514 | } | |
1515 | } | |
1516 | ||
ede4eed4 KR |
1517 | return true; |
1518 | ||
1519 | error_return: | |
1520 | if (buf != NULL) | |
1521 | free (buf); | |
1522 | if (dynbuf != NULL) | |
1523 | free (dynbuf); | |
d044b40a ILT |
1524 | if (dynver != NULL) |
1525 | free (dynver); | |
1526 | if (extversym != NULL) | |
1527 | free (extversym); | |
ede4eed4 KR |
1528 | return false; |
1529 | } | |
1530 | ||
1531 | /* Create some sections which will be filled in with dynamic linking | |
1532 | information. ABFD is an input file which requires dynamic sections | |
1533 | to be created. The dynamic sections take up virtual memory space | |
1534 | when the final executable is run, so we need to create them before | |
1535 | addresses are assigned to the output sections. We work out the | |
1536 | actual contents and size of these sections later. */ | |
1537 | ||
1538 | boolean | |
1539 | elf_link_create_dynamic_sections (abfd, info) | |
1540 | bfd *abfd; | |
1541 | struct bfd_link_info *info; | |
1542 | { | |
1543 | flagword flags; | |
1544 | register asection *s; | |
1545 | struct elf_link_hash_entry *h; | |
1546 | struct elf_backend_data *bed; | |
1547 | ||
1548 | if (elf_hash_table (info)->dynamic_sections_created) | |
1549 | return true; | |
1550 | ||
1551 | /* Make sure that all dynamic sections use the same input BFD. */ | |
1552 | if (elf_hash_table (info)->dynobj == NULL) | |
1553 | elf_hash_table (info)->dynobj = abfd; | |
1554 | else | |
1555 | abfd = elf_hash_table (info)->dynobj; | |
1556 | ||
1557 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
1558 | sections. */ | |
ff12f303 ILT |
1559 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
1560 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
ede4eed4 KR |
1561 | |
1562 | /* A dynamically linked executable has a .interp section, but a | |
1563 | shared library does not. */ | |
1564 | if (! info->shared) | |
1565 | { | |
1566 | s = bfd_make_section (abfd, ".interp"); | |
1567 | if (s == NULL | |
1568 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
1569 | return false; | |
1570 | } | |
1571 | ||
d044b40a ILT |
1572 | /* Create sections to hold version informations. These are removed |
1573 | if they are not needed. */ | |
1574 | s = bfd_make_section (abfd, ".gnu.version_d"); | |
1575 | if (s == NULL | |
1576 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1577 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
1578 | return false; | |
1579 | ||
1580 | s = bfd_make_section (abfd, ".gnu.version"); | |
1581 | if (s == NULL | |
1582 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1583 | || ! bfd_set_section_alignment (abfd, s, 1)) | |
1584 | return false; | |
1585 | ||
1586 | s = bfd_make_section (abfd, ".gnu.version_r"); | |
1587 | if (s == NULL | |
1588 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1589 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
1590 | return false; | |
1591 | ||
ede4eed4 KR |
1592 | s = bfd_make_section (abfd, ".dynsym"); |
1593 | if (s == NULL | |
1594 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1595 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1596 | return false; | |
1597 | ||
1598 | s = bfd_make_section (abfd, ".dynstr"); | |
1599 | if (s == NULL | |
1600 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
1601 | return false; | |
1602 | ||
1603 | /* Create a strtab to hold the dynamic symbol names. */ | |
1604 | if (elf_hash_table (info)->dynstr == NULL) | |
1605 | { | |
1606 | elf_hash_table (info)->dynstr = elf_stringtab_init (); | |
1607 | if (elf_hash_table (info)->dynstr == NULL) | |
1608 | return false; | |
1609 | } | |
1610 | ||
1611 | s = bfd_make_section (abfd, ".dynamic"); | |
1612 | if (s == NULL | |
1613 | || ! bfd_set_section_flags (abfd, s, flags) | |
1614 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1615 | return false; | |
1616 | ||
1617 | /* The special symbol _DYNAMIC is always set to the start of the | |
1618 | .dynamic section. This call occurs before we have processed the | |
1619 | symbols for any dynamic object, so we don't have to worry about | |
1620 | overriding a dynamic definition. We could set _DYNAMIC in a | |
1621 | linker script, but we only want to define it if we are, in fact, | |
1622 | creating a .dynamic section. We don't want to define it if there | |
1623 | is no .dynamic section, since on some ELF platforms the start up | |
1624 | code examines it to decide how to initialize the process. */ | |
1625 | h = NULL; | |
1626 | if (! (_bfd_generic_link_add_one_symbol | |
1627 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
1628 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
1629 | (struct bfd_link_hash_entry **) &h))) | |
1630 | return false; | |
1631 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
1632 | h->type = STT_OBJECT; | |
1633 | ||
1634 | if (info->shared | |
1635 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1636 | return false; | |
1637 | ||
1638 | s = bfd_make_section (abfd, ".hash"); | |
1639 | if (s == NULL | |
1640 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
1641 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
1642 | return false; | |
1643 | ||
1644 | /* Let the backend create the rest of the sections. This lets the | |
1645 | backend set the right flags. The backend will normally create | |
1646 | the .got and .plt sections. */ | |
1647 | bed = get_elf_backend_data (abfd); | |
1648 | if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
1649 | return false; | |
1650 | ||
1651 | elf_hash_table (info)->dynamic_sections_created = true; | |
1652 | ||
1653 | return true; | |
1654 | } | |
1655 | ||
1656 | /* Add an entry to the .dynamic table. */ | |
1657 | ||
1658 | boolean | |
1659 | elf_add_dynamic_entry (info, tag, val) | |
1660 | struct bfd_link_info *info; | |
1661 | bfd_vma tag; | |
1662 | bfd_vma val; | |
1663 | { | |
1664 | Elf_Internal_Dyn dyn; | |
1665 | bfd *dynobj; | |
1666 | asection *s; | |
1667 | size_t newsize; | |
1668 | bfd_byte *newcontents; | |
1669 | ||
1670 | dynobj = elf_hash_table (info)->dynobj; | |
1671 | ||
1672 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1673 | BFD_ASSERT (s != NULL); | |
1674 | ||
1675 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
58142f10 | 1676 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
ede4eed4 | 1677 | if (newcontents == NULL) |
58142f10 | 1678 | return false; |
ede4eed4 KR |
1679 | |
1680 | dyn.d_tag = tag; | |
1681 | dyn.d_un.d_val = val; | |
1682 | elf_swap_dyn_out (dynobj, &dyn, | |
1683 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
1684 | ||
1685 | s->_raw_size = newsize; | |
1686 | s->contents = newcontents; | |
1687 | ||
1688 | return true; | |
1689 | } | |
3b3753b8 | 1690 | \f |
ede4eed4 KR |
1691 | |
1692 | /* Read and swap the relocs for a section. They may have been cached. | |
1693 | If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL, | |
1694 | they are used as buffers to read into. They are known to be large | |
1695 | enough. If the INTERNAL_RELOCS relocs argument is NULL, the return | |
1696 | value is allocated using either malloc or bfd_alloc, according to | |
1697 | the KEEP_MEMORY argument. */ | |
1698 | ||
c86158e5 ILT |
1699 | Elf_Internal_Rela * |
1700 | NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs, | |
1701 | keep_memory) | |
ede4eed4 KR |
1702 | bfd *abfd; |
1703 | asection *o; | |
1704 | PTR external_relocs; | |
1705 | Elf_Internal_Rela *internal_relocs; | |
1706 | boolean keep_memory; | |
1707 | { | |
1708 | Elf_Internal_Shdr *rel_hdr; | |
1709 | PTR alloc1 = NULL; | |
1710 | Elf_Internal_Rela *alloc2 = NULL; | |
1711 | ||
1712 | if (elf_section_data (o)->relocs != NULL) | |
1713 | return elf_section_data (o)->relocs; | |
1714 | ||
1715 | if (o->reloc_count == 0) | |
1716 | return NULL; | |
1717 | ||
1718 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
1719 | ||
1720 | if (internal_relocs == NULL) | |
1721 | { | |
1722 | size_t size; | |
1723 | ||
1724 | size = o->reloc_count * sizeof (Elf_Internal_Rela); | |
1725 | if (keep_memory) | |
1726 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
1727 | else | |
58142f10 | 1728 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
ede4eed4 | 1729 | if (internal_relocs == NULL) |
58142f10 | 1730 | goto error_return; |
ede4eed4 KR |
1731 | } |
1732 | ||
1733 | if (external_relocs == NULL) | |
1734 | { | |
58142f10 | 1735 | alloc1 = (PTR) bfd_malloc ((size_t) rel_hdr->sh_size); |
ede4eed4 | 1736 | if (alloc1 == NULL) |
58142f10 | 1737 | goto error_return; |
ede4eed4 KR |
1738 | external_relocs = alloc1; |
1739 | } | |
1740 | ||
1741 | if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0) | |
1742 | || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd) | |
1743 | != rel_hdr->sh_size)) | |
1744 | goto error_return; | |
1745 | ||
1746 | /* Swap in the relocs. For convenience, we always produce an | |
1747 | Elf_Internal_Rela array; if the relocs are Rel, we set the addend | |
1748 | to 0. */ | |
1749 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
1750 | { | |
1751 | Elf_External_Rel *erel; | |
1752 | Elf_External_Rel *erelend; | |
1753 | Elf_Internal_Rela *irela; | |
1754 | ||
1755 | erel = (Elf_External_Rel *) external_relocs; | |
1756 | erelend = erel + o->reloc_count; | |
1757 | irela = internal_relocs; | |
1758 | for (; erel < erelend; erel++, irela++) | |
1759 | { | |
1760 | Elf_Internal_Rel irel; | |
1761 | ||
1762 | elf_swap_reloc_in (abfd, erel, &irel); | |
1763 | irela->r_offset = irel.r_offset; | |
1764 | irela->r_info = irel.r_info; | |
1765 | irela->r_addend = 0; | |
1766 | } | |
1767 | } | |
1768 | else | |
1769 | { | |
1770 | Elf_External_Rela *erela; | |
1771 | Elf_External_Rela *erelaend; | |
1772 | Elf_Internal_Rela *irela; | |
1773 | ||
1774 | BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)); | |
1775 | ||
1776 | erela = (Elf_External_Rela *) external_relocs; | |
1777 | erelaend = erela + o->reloc_count; | |
1778 | irela = internal_relocs; | |
1779 | for (; erela < erelaend; erela++, irela++) | |
1780 | elf_swap_reloca_in (abfd, erela, irela); | |
1781 | } | |
1782 | ||
1783 | /* Cache the results for next time, if we can. */ | |
1784 | if (keep_memory) | |
1785 | elf_section_data (o)->relocs = internal_relocs; | |
ff12f303 | 1786 | |
ede4eed4 KR |
1787 | if (alloc1 != NULL) |
1788 | free (alloc1); | |
1789 | ||
1790 | /* Don't free alloc2, since if it was allocated we are passing it | |
1791 | back (under the name of internal_relocs). */ | |
1792 | ||
1793 | return internal_relocs; | |
1794 | ||
1795 | error_return: | |
1796 | if (alloc1 != NULL) | |
1797 | free (alloc1); | |
1798 | if (alloc2 != NULL) | |
1799 | free (alloc2); | |
1800 | return NULL; | |
1801 | } | |
3b3753b8 | 1802 | \f |
ede4eed4 KR |
1803 | |
1804 | /* Record an assignment to a symbol made by a linker script. We need | |
1805 | this in case some dynamic object refers to this symbol. */ | |
1806 | ||
1807 | /*ARGSUSED*/ | |
1808 | boolean | |
1809 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide) | |
1810 | bfd *output_bfd; | |
1811 | struct bfd_link_info *info; | |
1812 | const char *name; | |
1813 | boolean provide; | |
1814 | { | |
1815 | struct elf_link_hash_entry *h; | |
1816 | ||
1817 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
1818 | return true; | |
1819 | ||
1820 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false); | |
1821 | if (h == NULL) | |
1822 | return false; | |
1823 | ||
869b7d80 ILT |
1824 | if (h->root.type == bfd_link_hash_new) |
1825 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
1826 | ||
ede4eed4 KR |
1827 | /* If this symbol is being provided by the linker script, and it is |
1828 | currently defined by a dynamic object, but not by a regular | |
1829 | object, then mark it as undefined so that the generic linker will | |
1830 | force the correct value. */ | |
1831 | if (provide | |
1832 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
1833 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
1834 | h->root.type = bfd_link_hash_undefined; | |
1835 | ||
1836 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
1837 | h->type = STT_OBJECT; | |
1838 | ||
1839 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1840 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
1841 | || info->shared) | |
1842 | && h->dynindx == -1) | |
1843 | { | |
1844 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1845 | return false; | |
1846 | ||
1847 | /* If this is a weak defined symbol, and we know a corresponding | |
1848 | real symbol from the same dynamic object, make sure the real | |
1849 | symbol is also made into a dynamic symbol. */ | |
1850 | if (h->weakdef != NULL | |
1851 | && h->weakdef->dynindx == -1) | |
1852 | { | |
1853 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
1854 | return false; | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | return true; | |
1859 | } | |
3b3753b8 | 1860 | \f |
d044b40a ILT |
1861 | /* This structure is used to pass information to |
1862 | elf_link_assign_sym_version. */ | |
1863 | ||
1864 | struct elf_assign_sym_version_info | |
1865 | { | |
1866 | /* Output BFD. */ | |
1867 | bfd *output_bfd; | |
1868 | /* General link information. */ | |
1869 | struct bfd_link_info *info; | |
1870 | /* Version tree. */ | |
1871 | struct bfd_elf_version_tree *verdefs; | |
1872 | /* Whether we are exporting all dynamic symbols. */ | |
1873 | boolean export_dynamic; | |
1874 | /* Whether we removed any symbols from the dynamic symbol table. */ | |
1875 | boolean removed_dynamic; | |
1876 | /* Whether we had a failure. */ | |
1877 | boolean failed; | |
1878 | }; | |
1879 | ||
1880 | /* This structure is used to pass information to | |
1881 | elf_link_find_version_dependencies. */ | |
1882 | ||
1883 | struct elf_find_verdep_info | |
1884 | { | |
1885 | /* Output BFD. */ | |
1886 | bfd *output_bfd; | |
1887 | /* General link information. */ | |
1888 | struct bfd_link_info *info; | |
1889 | /* The number of dependencies. */ | |
1890 | unsigned int vers; | |
1891 | /* Whether we had a failure. */ | |
1892 | boolean failed; | |
1893 | }; | |
ede4eed4 KR |
1894 | |
1895 | /* Array used to determine the number of hash table buckets to use | |
1896 | based on the number of symbols there are. If there are fewer than | |
1897 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
1898 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
6b8ec6f3 | 1899 | than 32771 buckets. */ |
ede4eed4 KR |
1900 | |
1901 | static const size_t elf_buckets[] = | |
1902 | { | |
6b8ec6f3 ILT |
1903 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, |
1904 | 16411, 32771, 0 | |
ede4eed4 KR |
1905 | }; |
1906 | ||
1907 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
1908 | called by the ELF linker emulation before_allocation routine. We | |
1909 | must set the sizes of the sections before the linker sets the | |
1910 | addresses of the various sections. */ | |
1911 | ||
1912 | boolean | |
1913 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, | |
148437ec | 1914 | export_dynamic, filter_shlib, |
d044b40a ILT |
1915 | auxiliary_filters, info, sinterpptr, |
1916 | verdefs) | |
ede4eed4 KR |
1917 | bfd *output_bfd; |
1918 | const char *soname; | |
1919 | const char *rpath; | |
1920 | boolean export_dynamic; | |
148437ec | 1921 | const char *filter_shlib; |
db109ca2 | 1922 | const char * const *auxiliary_filters; |
ede4eed4 KR |
1923 | struct bfd_link_info *info; |
1924 | asection **sinterpptr; | |
d044b40a | 1925 | struct bfd_elf_version_tree *verdefs; |
ede4eed4 | 1926 | { |
d044b40a | 1927 | bfd_size_type soname_indx; |
ede4eed4 KR |
1928 | bfd *dynobj; |
1929 | struct elf_backend_data *bed; | |
e549b1d2 | 1930 | bfd_size_type old_dynsymcount; |
ede4eed4 KR |
1931 | |
1932 | *sinterpptr = NULL; | |
1933 | ||
d044b40a ILT |
1934 | soname_indx = -1; |
1935 | ||
ede4eed4 KR |
1936 | if (info->hash->creator->flavour != bfd_target_elf_flavour) |
1937 | return true; | |
1938 | ||
ff12f303 ILT |
1939 | /* The backend may have to create some sections regardless of whether |
1940 | we're dynamic or not. */ | |
1941 | bed = get_elf_backend_data (output_bfd); | |
1942 | if (bed->elf_backend_always_size_sections | |
1943 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
1944 | return false; | |
1945 | ||
ede4eed4 KR |
1946 | dynobj = elf_hash_table (info)->dynobj; |
1947 | ||
1948 | /* If there were no dynamic objects in the link, there is nothing to | |
1949 | do here. */ | |
1950 | if (dynobj == NULL) | |
1951 | return true; | |
1952 | ||
1953 | /* If we are supposed to export all symbols into the dynamic symbol | |
1954 | table (this is not the normal case), then do so. */ | |
1955 | if (export_dynamic) | |
1956 | { | |
1957 | struct elf_info_failed eif; | |
1958 | ||
1959 | eif.failed = false; | |
1960 | eif.info = info; | |
1961 | elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol, | |
1962 | (PTR) &eif); | |
1963 | if (eif.failed) | |
1964 | return false; | |
1965 | } | |
1966 | ||
1967 | if (elf_hash_table (info)->dynamic_sections_created) | |
1968 | { | |
1969 | struct elf_info_failed eif; | |
73a68447 | 1970 | struct elf_link_hash_entry *h; |
ede4eed4 KR |
1971 | bfd_size_type strsize; |
1972 | ||
1973 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
1974 | BFD_ASSERT (*sinterpptr != NULL || info->shared); | |
1975 | ||
1976 | if (soname != NULL) | |
1977 | { | |
d044b40a ILT |
1978 | soname_indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, |
1979 | soname, true, true); | |
1980 | if (soname_indx == (bfd_size_type) -1 | |
1981 | || ! elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
ede4eed4 | 1982 | return false; |
ff12f303 | 1983 | } |
ede4eed4 | 1984 | |
951fe66d ILT |
1985 | if (info->symbolic) |
1986 | { | |
1987 | if (! elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
1988 | return false; | |
1989 | } | |
1990 | ||
ede4eed4 KR |
1991 | if (rpath != NULL) |
1992 | { | |
1993 | bfd_size_type indx; | |
1994 | ||
1995 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, rpath, | |
1996 | true, true); | |
1997 | if (indx == (bfd_size_type) -1 | |
1998 | || ! elf_add_dynamic_entry (info, DT_RPATH, indx)) | |
1999 | return false; | |
2000 | } | |
2001 | ||
148437ec ILT |
2002 | if (filter_shlib != NULL) |
2003 | { | |
2004 | bfd_size_type indx; | |
2005 | ||
2006 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2007 | filter_shlib, true, true); | |
2008 | if (indx == (bfd_size_type) -1 | |
2009 | || ! elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
2010 | return false; | |
2011 | } | |
2012 | ||
db109ca2 | 2013 | if (auxiliary_filters != NULL) |
148437ec | 2014 | { |
db109ca2 | 2015 | const char * const *p; |
148437ec | 2016 | |
db109ca2 ILT |
2017 | for (p = auxiliary_filters; *p != NULL; p++) |
2018 | { | |
2019 | bfd_size_type indx; | |
2020 | ||
2021 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2022 | *p, true, true); | |
2023 | if (indx == (bfd_size_type) -1 | |
2024 | || ! elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
2025 | return false; | |
2026 | } | |
148437ec ILT |
2027 | } |
2028 | ||
ede4eed4 KR |
2029 | /* Find all symbols which were defined in a dynamic object and make |
2030 | the backend pick a reasonable value for them. */ | |
2031 | eif.failed = false; | |
2032 | eif.info = info; | |
2033 | elf_link_hash_traverse (elf_hash_table (info), | |
2034 | elf_adjust_dynamic_symbol, | |
2035 | (PTR) &eif); | |
2036 | if (eif.failed) | |
2037 | return false; | |
2038 | ||
2039 | /* Add some entries to the .dynamic section. We fill in some of the | |
2040 | values later, in elf_bfd_final_link, but we must add the entries | |
2041 | now so that we know the final size of the .dynamic section. */ | |
73a68447 ILT |
2042 | h = elf_link_hash_lookup (elf_hash_table (info), "_init", false, |
2043 | false, false); | |
2044 | if (h != NULL | |
2045 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
2046 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
ede4eed4 KR |
2047 | { |
2048 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) | |
2049 | return false; | |
2050 | } | |
73a68447 ILT |
2051 | h = elf_link_hash_lookup (elf_hash_table (info), "_fini", false, |
2052 | false, false); | |
2053 | if (h != NULL | |
2054 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
2055 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
ede4eed4 KR |
2056 | { |
2057 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) | |
2058 | return false; | |
2059 | } | |
2060 | strsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
2061 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) | |
2062 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
2063 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
2064 | || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
2065 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
2066 | sizeof (Elf_External_Sym))) | |
2067 | return false; | |
2068 | } | |
2069 | ||
2070 | /* The backend must work out the sizes of all the other dynamic | |
2071 | sections. */ | |
e549b1d2 | 2072 | old_dynsymcount = elf_hash_table (info)->dynsymcount; |
ede4eed4 KR |
2073 | if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
2074 | return false; | |
2075 | ||
2076 | if (elf_hash_table (info)->dynamic_sections_created) | |
2077 | { | |
2078 | size_t dynsymcount; | |
2079 | asection *s; | |
2080 | size_t i; | |
2081 | size_t bucketcount = 0; | |
2082 | Elf_Internal_Sym isym; | |
d6bfcdb5 | 2083 | struct elf_assign_sym_version_info sinfo; |
ede4eed4 | 2084 | |
d044b40a ILT |
2085 | /* Set up the version definition section. */ |
2086 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
2087 | BFD_ASSERT (s != NULL); | |
d6bfcdb5 ILT |
2088 | |
2089 | /* Attach all the symbols to their version information. This | |
2090 | may cause some symbols to be unexported. */ | |
2091 | sinfo.output_bfd = output_bfd; | |
2092 | sinfo.info = info; | |
2093 | sinfo.verdefs = verdefs; | |
2094 | sinfo.export_dynamic = export_dynamic; | |
2095 | sinfo.removed_dynamic = false; | |
2096 | sinfo.failed = false; | |
2097 | ||
2098 | elf_link_hash_traverse (elf_hash_table (info), | |
2099 | elf_link_assign_sym_version, | |
2100 | (PTR) &sinfo); | |
2101 | if (sinfo.failed) | |
2102 | return false; | |
2103 | ||
2104 | /* We may have created additional version definitions if we are | |
2105 | just linking a regular application. */ | |
2106 | verdefs = sinfo.verdefs; | |
2107 | ||
d044b40a ILT |
2108 | if (verdefs == NULL) |
2109 | { | |
d044b40a ILT |
2110 | asection **spp; |
2111 | ||
d044b40a ILT |
2112 | /* Don't include this section in the output file. */ |
2113 | for (spp = &output_bfd->sections; | |
2114 | *spp != s->output_section; | |
2115 | spp = &(*spp)->next) | |
2116 | ; | |
2117 | *spp = s->output_section->next; | |
2118 | --output_bfd->section_count; | |
2119 | } | |
2120 | else | |
2121 | { | |
d044b40a ILT |
2122 | unsigned int cdefs; |
2123 | bfd_size_type size; | |
2124 | struct bfd_elf_version_tree *t; | |
2125 | bfd_byte *p; | |
2126 | Elf_Internal_Verdef def; | |
2127 | Elf_Internal_Verdaux defaux; | |
2128 | ||
d044b40a ILT |
2129 | if (sinfo.removed_dynamic) |
2130 | { | |
2131 | /* Some dynamic symbols were changed to be local | |
e549b1d2 ILT |
2132 | symbols. In this case, we renumber all of the |
2133 | dynamic symbols, so that we don't have a hole. If | |
2134 | the backend changed dynsymcount, then assume that the | |
2135 | new symbols are at the start. This is the case on | |
2136 | the MIPS. FIXME: The names of the removed symbols | |
2137 | will still be in the dynamic string table, wasting | |
2138 | space. */ | |
2139 | elf_hash_table (info)->dynsymcount = | |
2140 | 1 + (elf_hash_table (info)->dynsymcount - old_dynsymcount); | |
d044b40a ILT |
2141 | elf_link_hash_traverse (elf_hash_table (info), |
2142 | elf_link_renumber_dynsyms, | |
2143 | (PTR) info); | |
2144 | } | |
2145 | ||
2146 | cdefs = 0; | |
2147 | size = 0; | |
2148 | ||
2149 | /* Make space for the base version. */ | |
2150 | size += sizeof (Elf_External_Verdef); | |
2151 | size += sizeof (Elf_External_Verdaux); | |
2152 | ++cdefs; | |
2153 | ||
2154 | for (t = verdefs; t != NULL; t = t->next) | |
2155 | { | |
2156 | struct bfd_elf_version_deps *n; | |
2157 | ||
2158 | size += sizeof (Elf_External_Verdef); | |
2159 | size += sizeof (Elf_External_Verdaux); | |
2160 | ++cdefs; | |
2161 | ||
2162 | for (n = t->deps; n != NULL; n = n->next) | |
2163 | size += sizeof (Elf_External_Verdaux); | |
2164 | } | |
2165 | ||
2166 | s->_raw_size = size; | |
2167 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2168 | if (s->contents == NULL && s->_raw_size != 0) | |
2169 | return false; | |
2170 | ||
2171 | /* Fill in the version definition section. */ | |
2172 | ||
2173 | p = s->contents; | |
2174 | ||
2175 | def.vd_version = VER_DEF_CURRENT; | |
2176 | def.vd_flags = VER_FLG_BASE; | |
2177 | def.vd_ndx = 1; | |
2178 | def.vd_cnt = 1; | |
2179 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2180 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2181 | + sizeof (Elf_External_Verdaux)); | |
2182 | ||
2183 | if (soname_indx != -1) | |
2184 | { | |
2185 | def.vd_hash = bfd_elf_hash ((const unsigned char *) soname); | |
2186 | defaux.vda_name = soname_indx; | |
2187 | } | |
2188 | else | |
2189 | { | |
2190 | const char *name; | |
2191 | bfd_size_type indx; | |
2192 | ||
2193 | name = output_bfd->filename; | |
2194 | def.vd_hash = bfd_elf_hash ((const unsigned char *) name); | |
2195 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2196 | name, true, false); | |
2197 | if (indx == (bfd_size_type) -1) | |
2198 | return false; | |
2199 | defaux.vda_name = indx; | |
2200 | } | |
2201 | defaux.vda_next = 0; | |
2202 | ||
2203 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
2204 | (Elf_External_Verdef *)p); | |
2205 | p += sizeof (Elf_External_Verdef); | |
2206 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2207 | (Elf_External_Verdaux *) p); | |
2208 | p += sizeof (Elf_External_Verdaux); | |
2209 | ||
2210 | for (t = verdefs; t != NULL; t = t->next) | |
2211 | { | |
2212 | unsigned int cdeps; | |
2213 | struct bfd_elf_version_deps *n; | |
2214 | struct elf_link_hash_entry *h; | |
2215 | ||
2216 | cdeps = 0; | |
2217 | for (n = t->deps; n != NULL; n = n->next) | |
2218 | ++cdeps; | |
2219 | ||
2220 | /* Add a symbol representing this version. */ | |
2221 | h = NULL; | |
2222 | if (! (_bfd_generic_link_add_one_symbol | |
2223 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
2224 | (bfd_vma) 0, (const char *) NULL, false, | |
2225 | get_elf_backend_data (dynobj)->collect, | |
2226 | (struct bfd_link_hash_entry **) &h))) | |
2227 | return false; | |
2228 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
2229 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2230 | h->type = STT_OBJECT; | |
2231 | h->verinfo.vertree = t; | |
2232 | ||
d6bfcdb5 ILT |
2233 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) |
2234 | return false; | |
d044b40a ILT |
2235 | |
2236 | def.vd_version = VER_DEF_CURRENT; | |
2237 | def.vd_flags = 0; | |
2238 | if (t->globals == NULL && t->locals == NULL && ! t->used) | |
2239 | def.vd_flags |= VER_FLG_WEAK; | |
2240 | def.vd_ndx = t->vernum + 1; | |
2241 | def.vd_cnt = cdeps + 1; | |
2242 | def.vd_hash = bfd_elf_hash ((const unsigned char *) t->name); | |
2243 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2244 | if (t->next != NULL) | |
2245 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2246 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
2247 | else | |
2248 | def.vd_next = 0; | |
2249 | ||
2250 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
2251 | (Elf_External_Verdef *) p); | |
2252 | p += sizeof (Elf_External_Verdef); | |
2253 | ||
2254 | defaux.vda_name = h->dynstr_index; | |
2255 | if (t->deps == NULL) | |
2256 | defaux.vda_next = 0; | |
2257 | else | |
2258 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2259 | t->name_indx = defaux.vda_name; | |
2260 | ||
2261 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2262 | (Elf_External_Verdaux *) p); | |
2263 | p += sizeof (Elf_External_Verdaux); | |
2264 | ||
2265 | for (n = t->deps; n != NULL; n = n->next) | |
2266 | { | |
2267 | defaux.vda_name = n->version_needed->name_indx; | |
2268 | if (n->next == NULL) | |
2269 | defaux.vda_next = 0; | |
2270 | else | |
2271 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2272 | ||
2273 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2274 | (Elf_External_Verdaux *) p); | |
2275 | p += sizeof (Elf_External_Verdaux); | |
2276 | } | |
2277 | } | |
2278 | ||
2279 | if (! elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
2280 | || ! elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
2281 | return false; | |
2282 | ||
2283 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
2284 | } | |
2285 | ||
2286 | /* Work out the size of the version reference section. */ | |
2287 | ||
2288 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
2289 | BFD_ASSERT (s != NULL); | |
2290 | { | |
2291 | struct elf_find_verdep_info sinfo; | |
2292 | ||
2293 | sinfo.output_bfd = output_bfd; | |
2294 | sinfo.info = info; | |
2295 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
2296 | if (sinfo.vers == 0) | |
2297 | sinfo.vers = 1; | |
2298 | sinfo.failed = false; | |
2299 | ||
2300 | elf_link_hash_traverse (elf_hash_table (info), | |
2301 | elf_link_find_version_dependencies, | |
2302 | (PTR) &sinfo); | |
2303 | ||
2304 | if (elf_tdata (output_bfd)->verref == NULL) | |
2305 | { | |
2306 | asection **spp; | |
2307 | ||
2308 | /* We don't have any version definitions, so we can just | |
2309 | remove the section. */ | |
2310 | ||
2311 | for (spp = &output_bfd->sections; | |
2312 | *spp != s->output_section; | |
2313 | spp = &(*spp)->next) | |
2314 | ; | |
2315 | *spp = s->output_section->next; | |
2316 | --output_bfd->section_count; | |
2317 | } | |
2318 | else | |
2319 | { | |
2320 | Elf_Internal_Verneed *t; | |
2321 | unsigned int size; | |
2322 | unsigned int crefs; | |
2323 | bfd_byte *p; | |
2324 | ||
2325 | /* Build the version definition section. */ | |
d6bfcdb5 ILT |
2326 | size = 0; |
2327 | crefs = 0; | |
d044b40a ILT |
2328 | for (t = elf_tdata (output_bfd)->verref; |
2329 | t != NULL; | |
2330 | t = t->vn_nextref) | |
2331 | { | |
2332 | Elf_Internal_Vernaux *a; | |
2333 | ||
2334 | size += sizeof (Elf_External_Verneed); | |
2335 | ++crefs; | |
2336 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2337 | size += sizeof (Elf_External_Vernaux); | |
2338 | } | |
2339 | ||
2340 | s->_raw_size = size; | |
2341 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, size); | |
2342 | if (s->contents == NULL) | |
2343 | return false; | |
2344 | ||
2345 | p = s->contents; | |
2346 | for (t = elf_tdata (output_bfd)->verref; | |
2347 | t != NULL; | |
2348 | t = t->vn_nextref) | |
2349 | { | |
2350 | unsigned int caux; | |
2351 | Elf_Internal_Vernaux *a; | |
2352 | bfd_size_type indx; | |
2353 | ||
2354 | caux = 0; | |
2355 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2356 | ++caux; | |
2357 | ||
2358 | t->vn_version = VER_NEED_CURRENT; | |
2359 | t->vn_cnt = caux; | |
2360 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2361 | t->vn_bfd->filename, true, false); | |
2362 | if (indx == (bfd_size_type) -1) | |
2363 | return false; | |
2364 | t->vn_file = indx; | |
2365 | t->vn_aux = sizeof (Elf_External_Verneed); | |
2366 | if (t->vn_nextref == NULL) | |
2367 | t->vn_next = 0; | |
2368 | else | |
2369 | t->vn_next = (sizeof (Elf_External_Verneed) | |
2370 | + caux * sizeof (Elf_External_Vernaux)); | |
2371 | ||
2372 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
2373 | (Elf_External_Verneed *) p); | |
2374 | p += sizeof (Elf_External_Verneed); | |
2375 | ||
2376 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2377 | { | |
2378 | a->vna_hash = bfd_elf_hash ((const unsigned char *) | |
2379 | a->vna_nodename); | |
2380 | indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, | |
2381 | a->vna_nodename, true, false); | |
2382 | if (indx == (bfd_size_type) -1) | |
2383 | return false; | |
2384 | a->vna_name = indx; | |
2385 | if (a->vna_nextptr == NULL) | |
2386 | a->vna_next = 0; | |
2387 | else | |
2388 | a->vna_next = sizeof (Elf_External_Vernaux); | |
2389 | ||
2390 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
2391 | (Elf_External_Vernaux *) p); | |
2392 | p += sizeof (Elf_External_Vernaux); | |
2393 | } | |
2394 | } | |
2395 | ||
2396 | if (! elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
2397 | || ! elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
2398 | return false; | |
2399 | ||
2400 | elf_tdata (output_bfd)->cverrefs = crefs; | |
2401 | } | |
2402 | } | |
2403 | ||
2404 | dynsymcount = elf_hash_table (info)->dynsymcount; | |
2405 | ||
2406 | /* Work out the size of the symbol version section. */ | |
2407 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
2408 | BFD_ASSERT (s != NULL); | |
2409 | if (dynsymcount == 0 | |
2410 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
2411 | { | |
2412 | asection **spp; | |
2413 | ||
2414 | /* We don't need any symbol versions; just discard the | |
2415 | section. */ | |
2416 | for (spp = &output_bfd->sections; | |
2417 | *spp != s->output_section; | |
2418 | spp = &(*spp)->next) | |
2419 | ; | |
2420 | *spp = s->output_section->next; | |
2421 | --output_bfd->section_count; | |
2422 | } | |
2423 | else | |
2424 | { | |
d044b40a | 2425 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); |
e549b1d2 | 2426 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
d044b40a ILT |
2427 | if (s->contents == NULL) |
2428 | return false; | |
2429 | ||
d044b40a ILT |
2430 | if (! elf_add_dynamic_entry (info, DT_VERSYM, 0)) |
2431 | return false; | |
2432 | } | |
2433 | ||
ede4eed4 KR |
2434 | /* Set the size of the .dynsym and .hash sections. We counted |
2435 | the number of dynamic symbols in elf_link_add_object_symbols. | |
2436 | We will build the contents of .dynsym and .hash when we build | |
2437 | the final symbol table, because until then we do not know the | |
2438 | correct value to give the symbols. We built the .dynstr | |
2439 | section as we went along in elf_link_add_object_symbols. */ | |
ede4eed4 KR |
2440 | s = bfd_get_section_by_name (dynobj, ".dynsym"); |
2441 | BFD_ASSERT (s != NULL); | |
2442 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
2443 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2444 | if (s->contents == NULL && s->_raw_size != 0) | |
a9713b91 | 2445 | return false; |
ede4eed4 KR |
2446 | |
2447 | /* The first entry in .dynsym is a dummy symbol. */ | |
2448 | isym.st_value = 0; | |
2449 | isym.st_size = 0; | |
2450 | isym.st_name = 0; | |
2451 | isym.st_info = 0; | |
2452 | isym.st_other = 0; | |
2453 | isym.st_shndx = 0; | |
2454 | elf_swap_symbol_out (output_bfd, &isym, | |
cf9fb9f2 | 2455 | (PTR) (Elf_External_Sym *) s->contents); |
ede4eed4 KR |
2456 | |
2457 | for (i = 0; elf_buckets[i] != 0; i++) | |
2458 | { | |
2459 | bucketcount = elf_buckets[i]; | |
2460 | if (dynsymcount < elf_buckets[i + 1]) | |
2461 | break; | |
2462 | } | |
2463 | ||
2464 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
2465 | BFD_ASSERT (s != NULL); | |
2466 | s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8); | |
2467 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
2468 | if (s->contents == NULL) | |
a9713b91 | 2469 | return false; |
3fe22b98 | 2470 | memset (s->contents, 0, (size_t) s->_raw_size); |
ede4eed4 KR |
2471 | |
2472 | put_word (output_bfd, bucketcount, s->contents); | |
2473 | put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8)); | |
2474 | ||
2475 | elf_hash_table (info)->bucketcount = bucketcount; | |
2476 | ||
2477 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
2478 | BFD_ASSERT (s != NULL); | |
2479 | s->_raw_size = _bfd_stringtab_size (elf_hash_table (info)->dynstr); | |
2480 | ||
2481 | if (! elf_add_dynamic_entry (info, DT_NULL, 0)) | |
2482 | return false; | |
2483 | } | |
2484 | ||
2485 | return true; | |
2486 | } | |
3b3753b8 | 2487 | \f |
ede4eed4 KR |
2488 | /* Make the backend pick a good value for a dynamic symbol. This is |
2489 | called via elf_link_hash_traverse, and also calls itself | |
2490 | recursively. */ | |
2491 | ||
2492 | static boolean | |
2493 | elf_adjust_dynamic_symbol (h, data) | |
2494 | struct elf_link_hash_entry *h; | |
2495 | PTR data; | |
2496 | { | |
2497 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
2498 | bfd *dynobj; | |
2499 | struct elf_backend_data *bed; | |
2500 | ||
e549b1d2 | 2501 | /* Ignore indirect symbols. These are added by the versioning code. */ |
d044b40a ILT |
2502 | if (h->root.type == bfd_link_hash_indirect) |
2503 | return true; | |
2504 | ||
869b7d80 ILT |
2505 | /* If this symbol was mentioned in a non-ELF file, try to set |
2506 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2507 | permit a non-ELF file to correctly refer to a symbol defined in | |
2508 | an ELF dynamic object. */ | |
2509 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0) | |
2510 | { | |
2511 | if (h->root.type != bfd_link_hash_defined | |
2512 | && h->root.type != bfd_link_hash_defweak) | |
2513 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
2514 | else | |
2515 | { | |
e303e2e3 ILT |
2516 | if (h->root.u.def.section->owner != NULL |
2517 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2518 | == bfd_target_elf_flavour)) | |
869b7d80 ILT |
2519 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; |
2520 | else | |
2521 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2522 | } | |
2523 | ||
2524 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2525 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
2526 | { | |
2527 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
2528 | { | |
2529 | eif->failed = true; | |
2530 | return false; | |
2531 | } | |
2532 | } | |
2533 | } | |
2534 | ||
ce6a7731 ILT |
2535 | /* If this is a final link, and the symbol was defined as a common |
2536 | symbol in a regular object file, and there was no definition in | |
2537 | any dynamic object, then the linker will have allocated space for | |
2538 | the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR | |
2539 | flag will not have been set. */ | |
2540 | if (h->root.type == bfd_link_hash_defined | |
2541 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
2542 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 | |
2543 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
2544 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
2545 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2546 | ||
951fe66d ILT |
2547 | /* If -Bsymbolic was used (which means to bind references to global |
2548 | symbols to the definition within the shared object), and this | |
2549 | symbol was defined in a regular object, then it actually doesn't | |
2550 | need a PLT entry. */ | |
2551 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 | |
2552 | && eif->info->shared | |
2553 | && eif->info->symbolic | |
2554 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
2555 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_NEEDS_PLT; | |
2556 | ||
ede4eed4 KR |
2557 | /* If this symbol does not require a PLT entry, and it is not |
2558 | defined by a dynamic object, or is not referenced by a regular | |
452a5efb ILT |
2559 | object, ignore it. We do have to handle a weak defined symbol, |
2560 | even if no regular object refers to it, if we decided to add it | |
2561 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2562 | about symbols which are defined by one dynamic object and | |
2563 | referenced by another one? */ | |
ede4eed4 KR |
2564 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0 |
2565 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
2566 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
452a5efb ILT |
2567 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
2568 | && (h->weakdef == NULL || h->weakdef->dynindx == -1)))) | |
ede4eed4 KR |
2569 | return true; |
2570 | ||
2571 | /* If we've already adjusted this symbol, don't do it again. This | |
2572 | can happen via a recursive call. */ | |
2573 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
2574 | return true; | |
2575 | ||
2576 | /* Don't look at this symbol again. Note that we must set this | |
2577 | after checking the above conditions, because we may look at a | |
2578 | symbol once, decide not to do anything, and then get called | |
2579 | recursively later after REF_REGULAR is set below. */ | |
2580 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
2581 | ||
2582 | /* If this is a weak definition, and we know a real definition, and | |
2583 | the real symbol is not itself defined by a regular object file, | |
2584 | then get a good value for the real definition. We handle the | |
2585 | real symbol first, for the convenience of the backend routine. | |
2586 | ||
2587 | Note that there is a confusing case here. If the real definition | |
2588 | is defined by a regular object file, we don't get the real symbol | |
2589 | from the dynamic object, but we do get the weak symbol. If the | |
2590 | processor backend uses a COPY reloc, then if some routine in the | |
2591 | dynamic object changes the real symbol, we will not see that | |
2592 | change in the corresponding weak symbol. This is the way other | |
2593 | ELF linkers work as well, and seems to be a result of the shared | |
2594 | library model. | |
2595 | ||
2596 | I will clarify this issue. Most SVR4 shared libraries define the | |
2597 | variable _timezone and define timezone as a weak synonym. The | |
2598 | tzset call changes _timezone. If you write | |
2599 | extern int timezone; | |
2600 | int _timezone = 5; | |
2601 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2602 | you might expect that, since timezone is a synonym for _timezone, | |
2603 | the same number will print both times. However, if the processor | |
2604 | backend uses a COPY reloc, then actually timezone will be copied | |
2605 | into your process image, and, since you define _timezone | |
2606 | yourself, _timezone will not. Thus timezone and _timezone will | |
2607 | wind up at different memory locations. The tzset call will set | |
2608 | _timezone, leaving timezone unchanged. */ | |
2609 | ||
2610 | if (h->weakdef != NULL) | |
2611 | { | |
2612 | struct elf_link_hash_entry *weakdef; | |
2613 | ||
2614 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2615 | || h->root.type == bfd_link_hash_defweak); | |
2616 | weakdef = h->weakdef; | |
2617 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined | |
2618 | || weakdef->root.type == bfd_link_hash_defweak); | |
2619 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
2620 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
2621 | { | |
2622 | /* This symbol is defined by a regular object file, so we | |
2623 | will not do anything special. Clear weakdef for the | |
2624 | convenience of the processor backend. */ | |
2625 | h->weakdef = NULL; | |
2626 | } | |
2627 | else | |
2628 | { | |
2629 | /* There is an implicit reference by a regular object file | |
2630 | via the weak symbol. */ | |
2631 | weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
2632 | if (! elf_adjust_dynamic_symbol (weakdef, (PTR) eif)) | |
2633 | return false; | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2638 | bed = get_elf_backend_data (dynobj); | |
2639 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) | |
2640 | { | |
2641 | eif->failed = true; | |
2642 | return false; | |
2643 | } | |
2644 | ||
2645 | return true; | |
2646 | } | |
2647 | \f | |
d044b40a ILT |
2648 | /* This routine is used to export all defined symbols into the dynamic |
2649 | symbol table. It is called via elf_link_hash_traverse. */ | |
2650 | ||
2651 | static boolean | |
2652 | elf_export_symbol (h, data) | |
2653 | struct elf_link_hash_entry *h; | |
2654 | PTR data; | |
2655 | { | |
2656 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
2657 | ||
e549b1d2 ILT |
2658 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2659 | if (h->root.type == bfd_link_hash_indirect) | |
2660 | return true; | |
2661 | ||
d044b40a ILT |
2662 | if (h->dynindx == -1 |
2663 | && (h->elf_link_hash_flags | |
2664 | & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
2665 | { | |
2666 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
2667 | { | |
2668 | eif->failed = true; | |
2669 | return false; | |
2670 | } | |
2671 | } | |
2672 | ||
2673 | return true; | |
2674 | } | |
2675 | \f | |
2676 | /* Look through the symbols which are defined in other shared | |
2677 | libraries and referenced here. Update the list of version | |
2678 | dependencies. This will be put into the .gnu.version_r section. | |
2679 | This function is called via elf_link_hash_traverse. */ | |
2680 | ||
2681 | static boolean | |
2682 | elf_link_find_version_dependencies (h, data) | |
2683 | struct elf_link_hash_entry *h; | |
2684 | PTR data; | |
2685 | { | |
2686 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; | |
2687 | Elf_Internal_Verneed *t; | |
2688 | Elf_Internal_Vernaux *a; | |
2689 | ||
2690 | /* We only care about symbols defined in shared objects with version | |
2691 | information. */ | |
2692 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
a48ef404 | 2693 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 |
d044b40a ILT |
2694 | || h->dynindx == -1 |
2695 | || h->verinfo.verdef == NULL) | |
2696 | return true; | |
2697 | ||
2698 | /* See if we already know about this version. */ | |
2699 | for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref) | |
2700 | { | |
2701 | if (t->vn_bfd == h->verinfo.verdef->vd_bfd) | |
2702 | continue; | |
2703 | ||
2704 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2705 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
2706 | return true; | |
2707 | ||
2708 | break; | |
2709 | } | |
2710 | ||
2711 | /* This is a new version. Add it to tree we are building. */ | |
2712 | ||
2713 | if (t == NULL) | |
2714 | { | |
2715 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, sizeof *t); | |
2716 | if (t == NULL) | |
2717 | { | |
2718 | rinfo->failed = true; | |
2719 | return false; | |
2720 | } | |
2721 | ||
2722 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
2723 | t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref; | |
2724 | elf_tdata (rinfo->output_bfd)->verref = t; | |
2725 | } | |
2726 | ||
2727 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, sizeof *a); | |
2728 | ||
2729 | /* Note that we are copying a string pointer here, and testing it | |
2730 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2731 | discard the string data when low in memory, this will have to be | |
2732 | fixed. */ | |
2733 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2734 | ||
2735 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2736 | a->vna_nextptr = t->vn_auxptr; | |
2737 | ||
2738 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2739 | ++rinfo->vers; | |
2740 | ||
2741 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2742 | ||
2743 | t->vn_auxptr = a; | |
2744 | ||
2745 | return true; | |
2746 | } | |
2747 | ||
2748 | /* Figure out appropriate versions for all the symbols. We may not | |
2749 | have the version number script until we have read all of the input | |
2750 | files, so until that point we don't know which symbols should be | |
2751 | local. This function is called via elf_link_hash_traverse. */ | |
2752 | ||
2753 | static boolean | |
2754 | elf_link_assign_sym_version (h, data) | |
2755 | struct elf_link_hash_entry *h; | |
2756 | PTR data; | |
2757 | { | |
2758 | struct elf_assign_sym_version_info *sinfo = | |
2759 | (struct elf_assign_sym_version_info *) data; | |
2760 | struct bfd_link_info *info = sinfo->info; | |
2761 | char *p; | |
2762 | ||
2763 | /* We only need version numbers for symbols defined in regular | |
2764 | objects. */ | |
2765 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2766 | return true; | |
2767 | ||
2768 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
2769 | if (p != NULL && h->verinfo.vertree == NULL) | |
2770 | { | |
2771 | struct bfd_elf_version_tree *t; | |
2772 | boolean hidden; | |
2773 | ||
2774 | hidden = true; | |
2775 | ||
2776 | /* There are two consecutive ELF_VER_CHR characters if this is | |
2777 | not a hidden symbol. */ | |
2778 | ++p; | |
2779 | if (*p == ELF_VER_CHR) | |
2780 | { | |
2781 | hidden = false; | |
2782 | ++p; | |
2783 | } | |
2784 | ||
2785 | /* If there is no version string, we can just return out. */ | |
2786 | if (*p == '\0') | |
2787 | { | |
2788 | if (hidden) | |
2789 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
2790 | return true; | |
2791 | } | |
2792 | ||
2793 | /* Look for the version. If we find it, it is no longer weak. */ | |
2794 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
2795 | { | |
2796 | if (strcmp (t->name, p) == 0) | |
2797 | { | |
2798 | h->verinfo.vertree = t; | |
2799 | t->used = true; | |
d6bfcdb5 ILT |
2800 | |
2801 | /* See if there is anything to force this symbol to | |
2802 | local scope. */ | |
2803 | if (t->locals != NULL) | |
2804 | { | |
2805 | int len; | |
2806 | char *alc; | |
2807 | struct bfd_elf_version_expr *d; | |
2808 | ||
2809 | len = p - h->root.root.string; | |
2810 | alc = bfd_alloc (sinfo->output_bfd, len); | |
2811 | if (alc == NULL) | |
2812 | return false; | |
2813 | strncpy (alc, h->root.root.string, len - 1); | |
2814 | alc[len - 1] = '\0'; | |
2815 | if (alc[len - 2] == ELF_VER_CHR) | |
2816 | alc[len - 2] = '\0'; | |
2817 | ||
2818 | for (d = t->locals; d != NULL; d = d->next) | |
2819 | { | |
2820 | if ((d->match[0] == '*' && d->match[1] == '\0') | |
2821 | || fnmatch (d->match, alc, 0) == 0) | |
2822 | { | |
2823 | if (h->dynindx != -1 | |
2824 | && info->shared | |
2825 | && ! sinfo->export_dynamic | |
2826 | && (h->elf_link_hash_flags | |
2827 | & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
2828 | { | |
2829 | sinfo->removed_dynamic = true; | |
52c92c7f | 2830 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
d6bfcdb5 ILT |
2831 | h->dynindx = -1; |
2832 | /* FIXME: The name of the symbol has | |
2833 | already been recorded in the dynamic | |
2834 | string table section. */ | |
2835 | } | |
2836 | ||
2837 | break; | |
2838 | } | |
2839 | } | |
2840 | ||
2841 | bfd_release (sinfo->output_bfd, alc); | |
2842 | } | |
2843 | ||
d044b40a ILT |
2844 | break; |
2845 | } | |
2846 | } | |
2847 | ||
d6bfcdb5 ILT |
2848 | /* If we are building an application, we need to create a |
2849 | version node for this version. */ | |
2850 | if (t == NULL && ! info->shared) | |
2851 | { | |
2852 | struct bfd_elf_version_tree **pp; | |
2853 | int version_index; | |
2854 | ||
2855 | /* If we aren't going to export this symbol, we don't need | |
2856 | to worry about it. */ | |
2857 | if (h->dynindx == -1) | |
2858 | return true; | |
2859 | ||
2860 | t = ((struct bfd_elf_version_tree *) | |
2861 | bfd_alloc (sinfo->output_bfd, sizeof *t)); | |
2862 | if (t == NULL) | |
2863 | { | |
2864 | sinfo->failed = true; | |
2865 | return false; | |
2866 | } | |
2867 | ||
2868 | t->next = NULL; | |
2869 | t->name = p; | |
2870 | t->globals = NULL; | |
2871 | t->locals = NULL; | |
2872 | t->deps = NULL; | |
2873 | t->name_indx = (unsigned int) -1; | |
2874 | t->used = true; | |
2875 | ||
2876 | version_index = 1; | |
2877 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) | |
2878 | ++version_index; | |
2879 | t->vernum = version_index; | |
2880 | ||
2881 | *pp = t; | |
2882 | ||
2883 | h->verinfo.vertree = t; | |
2884 | } | |
2885 | else if (t == NULL) | |
d044b40a | 2886 | { |
d6bfcdb5 ILT |
2887 | /* We could not find the version for a symbol when |
2888 | generating a shared archive. Return an error. */ | |
d044b40a | 2889 | (*_bfd_error_handler) |
52c92c7f ILT |
2890 | ("%s: undefined version name %s", |
2891 | bfd_get_filename (sinfo->output_bfd), h->root.root.string); | |
d044b40a ILT |
2892 | bfd_set_error (bfd_error_bad_value); |
2893 | sinfo->failed = true; | |
2894 | return false; | |
2895 | } | |
2896 | ||
2897 | if (hidden) | |
2898 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
2899 | } | |
2900 | ||
2901 | /* If we don't have a version for this symbol, see if we can find | |
2902 | something. */ | |
2903 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
2904 | { | |
2905 | struct bfd_elf_version_tree *t; | |
2906 | struct bfd_elf_version_tree *deflt; | |
2907 | struct bfd_elf_version_expr *d; | |
2908 | ||
2909 | /* See if can find what version this symbol is in. If the | |
2910 | symbol is supposed to eb local, then don't actually register | |
2911 | it. */ | |
2912 | deflt = NULL; | |
2913 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
2914 | { | |
2915 | if (t->globals != NULL) | |
2916 | { | |
2917 | for (d = t->globals; d != NULL; d = d->next) | |
2918 | { | |
2919 | if (fnmatch (d->match, h->root.root.string, 0) == 0) | |
2920 | { | |
2921 | h->verinfo.vertree = t; | |
2922 | break; | |
2923 | } | |
2924 | } | |
2925 | ||
2926 | if (d != NULL) | |
2927 | break; | |
2928 | } | |
2929 | ||
2930 | if (t->locals != NULL) | |
2931 | { | |
2932 | for (d = t->locals; d != NULL; d = d->next) | |
2933 | { | |
2934 | if (d->match[0] == '*' && d->match[1] == '\0') | |
2935 | deflt = t; | |
2936 | else if (fnmatch (d->match, h->root.root.string, 0) == 0) | |
2937 | { | |
2938 | h->verinfo.vertree = t; | |
2939 | if (h->dynindx != -1 | |
2940 | && info->shared | |
2941 | && ! sinfo->export_dynamic | |
2942 | && (h->elf_link_hash_flags | |
2943 | & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
2944 | { | |
2945 | sinfo->removed_dynamic = true; | |
52c92c7f | 2946 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
d044b40a ILT |
2947 | h->dynindx = -1; |
2948 | /* FIXME: The name of the symbol has already | |
2949 | been recorded in the dynamic string table | |
2950 | section. */ | |
2951 | } | |
2952 | break; | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | if (d != NULL) | |
2957 | break; | |
2958 | } | |
2959 | } | |
2960 | ||
2961 | if (deflt != NULL && h->verinfo.vertree == NULL) | |
2962 | { | |
2963 | h->verinfo.vertree = deflt; | |
2964 | if (h->dynindx != -1 | |
2965 | && info->shared | |
2966 | && ! sinfo->export_dynamic | |
2967 | && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
2968 | { | |
2969 | sinfo->removed_dynamic = true; | |
52c92c7f | 2970 | h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL; |
d044b40a ILT |
2971 | h->dynindx = -1; |
2972 | /* FIXME: The name of the symbol has already been | |
2973 | recorded in the dynamic string table section. */ | |
2974 | } | |
2975 | } | |
2976 | } | |
2977 | ||
2978 | return true; | |
2979 | } | |
2980 | ||
2981 | /* This function is used to renumber the dynamic symbols, if some of | |
2982 | them are removed because they are marked as local. This is called | |
2983 | via elf_link_hash_traverse. */ | |
2984 | ||
2985 | static boolean | |
2986 | elf_link_renumber_dynsyms (h, data) | |
2987 | struct elf_link_hash_entry *h; | |
2988 | PTR data; | |
2989 | { | |
2990 | struct bfd_link_info *info = (struct bfd_link_info *) data; | |
2991 | ||
2992 | if (h->dynindx != -1) | |
2993 | { | |
2994 | h->dynindx = elf_hash_table (info)->dynsymcount; | |
2995 | ++elf_hash_table (info)->dynsymcount; | |
2996 | } | |
2997 | ||
2998 | return true; | |
2999 | } | |
3000 | \f | |
ede4eed4 KR |
3001 | /* Final phase of ELF linker. */ |
3002 | ||
3003 | /* A structure we use to avoid passing large numbers of arguments. */ | |
3004 | ||
3005 | struct elf_final_link_info | |
3006 | { | |
3007 | /* General link information. */ | |
3008 | struct bfd_link_info *info; | |
3009 | /* Output BFD. */ | |
3010 | bfd *output_bfd; | |
3011 | /* Symbol string table. */ | |
3012 | struct bfd_strtab_hash *symstrtab; | |
3013 | /* .dynsym section. */ | |
3014 | asection *dynsym_sec; | |
3015 | /* .hash section. */ | |
3016 | asection *hash_sec; | |
d044b40a ILT |
3017 | /* symbol version section (.gnu.version). */ |
3018 | asection *symver_sec; | |
ede4eed4 KR |
3019 | /* Buffer large enough to hold contents of any section. */ |
3020 | bfd_byte *contents; | |
3021 | /* Buffer large enough to hold external relocs of any section. */ | |
3022 | PTR external_relocs; | |
3023 | /* Buffer large enough to hold internal relocs of any section. */ | |
3024 | Elf_Internal_Rela *internal_relocs; | |
3025 | /* Buffer large enough to hold external local symbols of any input | |
3026 | BFD. */ | |
3027 | Elf_External_Sym *external_syms; | |
3028 | /* Buffer large enough to hold internal local symbols of any input | |
3029 | BFD. */ | |
3030 | Elf_Internal_Sym *internal_syms; | |
3031 | /* Array large enough to hold a symbol index for each local symbol | |
3032 | of any input BFD. */ | |
3033 | long *indices; | |
3034 | /* Array large enough to hold a section pointer for each local | |
3035 | symbol of any input BFD. */ | |
3036 | asection **sections; | |
3037 | /* Buffer to hold swapped out symbols. */ | |
3038 | Elf_External_Sym *symbuf; | |
3039 | /* Number of swapped out symbols in buffer. */ | |
3040 | size_t symbuf_count; | |
3041 | /* Number of symbols which fit in symbuf. */ | |
3042 | size_t symbuf_size; | |
3043 | }; | |
3044 | ||
3045 | static boolean elf_link_output_sym | |
3046 | PARAMS ((struct elf_final_link_info *, const char *, | |
3047 | Elf_Internal_Sym *, asection *)); | |
3048 | static boolean elf_link_flush_output_syms | |
3049 | PARAMS ((struct elf_final_link_info *)); | |
3050 | static boolean elf_link_output_extsym | |
3051 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
3052 | static boolean elf_link_input_bfd | |
3053 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
3054 | static boolean elf_reloc_link_order | |
3055 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
3056 | struct bfd_link_order *)); | |
3057 | ||
52c92c7f | 3058 | /* This struct is used to pass information to elf_link_output_extsym. */ |
ede4eed4 | 3059 | |
52c92c7f | 3060 | struct elf_outext_info |
ede4eed4 KR |
3061 | { |
3062 | boolean failed; | |
52c92c7f | 3063 | boolean localsyms; |
ede4eed4 | 3064 | struct elf_final_link_info *finfo; |
ff12f303 | 3065 | }; |
ede4eed4 KR |
3066 | |
3067 | /* Do the final step of an ELF link. */ | |
3068 | ||
3069 | boolean | |
3070 | elf_bfd_final_link (abfd, info) | |
3071 | bfd *abfd; | |
3072 | struct bfd_link_info *info; | |
3073 | { | |
3074 | boolean dynamic; | |
3075 | bfd *dynobj; | |
3076 | struct elf_final_link_info finfo; | |
3077 | register asection *o; | |
3078 | register struct bfd_link_order *p; | |
3079 | register bfd *sub; | |
3080 | size_t max_contents_size; | |
3081 | size_t max_external_reloc_size; | |
3082 | size_t max_internal_reloc_count; | |
3083 | size_t max_sym_count; | |
3084 | file_ptr off; | |
3085 | Elf_Internal_Sym elfsym; | |
3086 | unsigned int i; | |
3087 | Elf_Internal_Shdr *symtab_hdr; | |
3088 | Elf_Internal_Shdr *symstrtab_hdr; | |
3089 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
52c92c7f | 3090 | struct elf_outext_info eoinfo; |
ede4eed4 KR |
3091 | |
3092 | if (info->shared) | |
3093 | abfd->flags |= DYNAMIC; | |
3094 | ||
3095 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
3096 | dynobj = elf_hash_table (info)->dynobj; | |
3097 | ||
3098 | finfo.info = info; | |
3099 | finfo.output_bfd = abfd; | |
3100 | finfo.symstrtab = elf_stringtab_init (); | |
3101 | if (finfo.symstrtab == NULL) | |
3102 | return false; | |
d044b40a | 3103 | |
ede4eed4 KR |
3104 | if (! dynamic) |
3105 | { | |
3106 | finfo.dynsym_sec = NULL; | |
3107 | finfo.hash_sec = NULL; | |
d044b40a | 3108 | finfo.symver_sec = NULL; |
ede4eed4 KR |
3109 | } |
3110 | else | |
3111 | { | |
3112 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
3113 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
3114 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
d044b40a ILT |
3115 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); |
3116 | /* Note that it is OK if symver_sec is NULL. */ | |
ede4eed4 | 3117 | } |
d044b40a | 3118 | |
ede4eed4 KR |
3119 | finfo.contents = NULL; |
3120 | finfo.external_relocs = NULL; | |
3121 | finfo.internal_relocs = NULL; | |
3122 | finfo.external_syms = NULL; | |
3123 | finfo.internal_syms = NULL; | |
3124 | finfo.indices = NULL; | |
3125 | finfo.sections = NULL; | |
3126 | finfo.symbuf = NULL; | |
3127 | finfo.symbuf_count = 0; | |
3128 | ||
3129 | /* Count up the number of relocations we will output for each output | |
3130 | section, so that we know the sizes of the reloc sections. We | |
3131 | also figure out some maximum sizes. */ | |
3132 | max_contents_size = 0; | |
3133 | max_external_reloc_size = 0; | |
3134 | max_internal_reloc_count = 0; | |
3135 | max_sym_count = 0; | |
3136 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
3137 | { | |
3138 | o->reloc_count = 0; | |
3139 | ||
3140 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3141 | { | |
3142 | if (p->type == bfd_section_reloc_link_order | |
3143 | || p->type == bfd_symbol_reloc_link_order) | |
3144 | ++o->reloc_count; | |
3145 | else if (p->type == bfd_indirect_link_order) | |
3146 | { | |
3147 | asection *sec; | |
3148 | ||
3149 | sec = p->u.indirect.section; | |
3150 | ||
7ec49f91 ILT |
3151 | /* Mark all sections which are to be included in the |
3152 | link. This will normally be every section. We need | |
3153 | to do this so that we can identify any sections which | |
3154 | the linker has decided to not include. */ | |
ff0e4a93 | 3155 | sec->linker_mark = true; |
7ec49f91 | 3156 | |
ede4eed4 KR |
3157 | if (info->relocateable) |
3158 | o->reloc_count += sec->reloc_count; | |
3159 | ||
3160 | if (sec->_raw_size > max_contents_size) | |
3161 | max_contents_size = sec->_raw_size; | |
3162 | if (sec->_cooked_size > max_contents_size) | |
3163 | max_contents_size = sec->_cooked_size; | |
3164 | ||
3165 | /* We are interested in just local symbols, not all | |
3166 | symbols. */ | |
d044b40a ILT |
3167 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour |
3168 | && (sec->owner->flags & DYNAMIC) == 0) | |
ede4eed4 KR |
3169 | { |
3170 | size_t sym_count; | |
3171 | ||
3172 | if (elf_bad_symtab (sec->owner)) | |
3173 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
3174 | / sizeof (Elf_External_Sym)); | |
3175 | else | |
3176 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
3177 | ||
3178 | if (sym_count > max_sym_count) | |
3179 | max_sym_count = sym_count; | |
3180 | ||
3181 | if ((sec->flags & SEC_RELOC) != 0) | |
3182 | { | |
3183 | size_t ext_size; | |
3184 | ||
3185 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
3186 | if (ext_size > max_external_reloc_size) | |
3187 | max_external_reloc_size = ext_size; | |
3188 | if (sec->reloc_count > max_internal_reloc_count) | |
3189 | max_internal_reloc_count = sec->reloc_count; | |
3190 | } | |
3191 | } | |
3192 | } | |
3193 | } | |
3194 | ||
3195 | if (o->reloc_count > 0) | |
3196 | o->flags |= SEC_RELOC; | |
3197 | else | |
3198 | { | |
3199 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
3200 | set it (this is probably a bug) and if it is set | |
3201 | assign_section_numbers will create a reloc section. */ | |
3202 | o->flags &=~ SEC_RELOC; | |
3203 | } | |
3204 | ||
3205 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
3206 | zero. This is done in elf_fake_sections as well, but forcing | |
3207 | the VMA to 0 here will ensure that relocs against these | |
3208 | sections are handled correctly. */ | |
2e0567eb ILT |
3209 | if ((o->flags & SEC_ALLOC) == 0 |
3210 | && ! o->user_set_vma) | |
ede4eed4 KR |
3211 | o->vma = 0; |
3212 | } | |
3213 | ||
3214 | /* Figure out the file positions for everything but the symbol table | |
3215 | and the relocs. We set symcount to force assign_section_numbers | |
3216 | to create a symbol table. */ | |
3217 | abfd->symcount = info->strip == strip_all ? 0 : 1; | |
3218 | BFD_ASSERT (! abfd->output_has_begun); | |
3219 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
3220 | goto error_return; | |
3221 | ||
3222 | /* That created the reloc sections. Set their sizes, and assign | |
3223 | them file positions, and allocate some buffers. */ | |
3224 | for (o = abfd->sections; o != NULL; o = o->next) | |
3225 | { | |
3226 | if ((o->flags & SEC_RELOC) != 0) | |
3227 | { | |
3228 | Elf_Internal_Shdr *rel_hdr; | |
3229 | register struct elf_link_hash_entry **p, **pend; | |
3230 | ||
3231 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
3232 | ||
3233 | rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count; | |
3234 | ||
3235 | /* The contents field must last into write_object_contents, | |
3236 | so we allocate it with bfd_alloc rather than malloc. */ | |
3237 | rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size); | |
3238 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) | |
a9713b91 | 3239 | goto error_return; |
ede4eed4 KR |
3240 | |
3241 | p = ((struct elf_link_hash_entry **) | |
58142f10 ILT |
3242 | bfd_malloc (o->reloc_count |
3243 | * sizeof (struct elf_link_hash_entry *))); | |
ede4eed4 | 3244 | if (p == NULL && o->reloc_count != 0) |
58142f10 | 3245 | goto error_return; |
ede4eed4 KR |
3246 | elf_section_data (o)->rel_hashes = p; |
3247 | pend = p + o->reloc_count; | |
3248 | for (; p < pend; p++) | |
3249 | *p = NULL; | |
3250 | ||
3251 | /* Use the reloc_count field as an index when outputting the | |
3252 | relocs. */ | |
3253 | o->reloc_count = 0; | |
3254 | } | |
3255 | } | |
3256 | ||
3257 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
3258 | ||
3259 | /* We have now assigned file positions for all the sections except | |
3260 | .symtab and .strtab. We start the .symtab section at the current | |
3261 | file position, and write directly to it. We build the .strtab | |
ab276dfa | 3262 | section in memory. */ |
ede4eed4 KR |
3263 | abfd->symcount = 0; |
3264 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3265 | /* sh_name is set in prep_headers. */ | |
3266 | symtab_hdr->sh_type = SHT_SYMTAB; | |
3267 | symtab_hdr->sh_flags = 0; | |
3268 | symtab_hdr->sh_addr = 0; | |
3269 | symtab_hdr->sh_size = 0; | |
3270 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
3271 | /* sh_link is set in assign_section_numbers. */ | |
3272 | /* sh_info is set below. */ | |
3273 | /* sh_offset is set just below. */ | |
3274 | symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */ | |
3275 | ||
3276 | off = elf_tdata (abfd)->next_file_pos; | |
3277 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true); | |
3278 | ||
3279 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
3280 | incorrect. We do not yet know the size of the .symtab section. | |
3281 | We correct next_file_pos below, after we do know the size. */ | |
3282 | ||
3283 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
3284 | continuously seeking to the right position in the file. */ | |
3285 | if (! info->keep_memory || max_sym_count < 20) | |
3286 | finfo.symbuf_size = 20; | |
3287 | else | |
3288 | finfo.symbuf_size = max_sym_count; | |
3289 | finfo.symbuf = ((Elf_External_Sym *) | |
58142f10 | 3290 | bfd_malloc (finfo.symbuf_size * sizeof (Elf_External_Sym))); |
ede4eed4 | 3291 | if (finfo.symbuf == NULL) |
58142f10 | 3292 | goto error_return; |
ede4eed4 KR |
3293 | |
3294 | /* Start writing out the symbol table. The first symbol is always a | |
3295 | dummy symbol. */ | |
28c16b55 ILT |
3296 | if (info->strip != strip_all || info->relocateable) |
3297 | { | |
3298 | elfsym.st_value = 0; | |
3299 | elfsym.st_size = 0; | |
3300 | elfsym.st_info = 0; | |
3301 | elfsym.st_other = 0; | |
3302 | elfsym.st_shndx = SHN_UNDEF; | |
3303 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
3304 | &elfsym, bfd_und_section_ptr)) | |
3305 | goto error_return; | |
3306 | } | |
ede4eed4 KR |
3307 | |
3308 | #if 0 | |
3309 | /* Some standard ELF linkers do this, but we don't because it causes | |
3310 | bootstrap comparison failures. */ | |
3311 | /* Output a file symbol for the output file as the second symbol. | |
3312 | We output this even if we are discarding local symbols, although | |
3313 | I'm not sure if this is correct. */ | |
3314 | elfsym.st_value = 0; | |
3315 | elfsym.st_size = 0; | |
3316 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
3317 | elfsym.st_other = 0; | |
3318 | elfsym.st_shndx = SHN_ABS; | |
3319 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
3320 | &elfsym, bfd_abs_section_ptr)) | |
3321 | goto error_return; | |
3322 | #endif | |
3323 | ||
3324 | /* Output a symbol for each section. We output these even if we are | |
3325 | discarding local symbols, since they are used for relocs. These | |
3326 | symbols have no names. We store the index of each one in the | |
3327 | index field of the section, so that we can find it again when | |
3328 | outputting relocs. */ | |
28c16b55 | 3329 | if (info->strip != strip_all || info->relocateable) |
ede4eed4 | 3330 | { |
28c16b55 ILT |
3331 | elfsym.st_size = 0; |
3332 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
3333 | elfsym.st_other = 0; | |
3334 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
3335 | { | |
3336 | o = section_from_elf_index (abfd, i); | |
3337 | if (o != NULL) | |
3338 | o->target_index = abfd->symcount; | |
3339 | elfsym.st_shndx = i; | |
34bc6ffc ILT |
3340 | if (info->relocateable || o == NULL) |
3341 | elfsym.st_value = 0; | |
3342 | else | |
3343 | elfsym.st_value = o->vma; | |
28c16b55 ILT |
3344 | if (! elf_link_output_sym (&finfo, (const char *) NULL, |
3345 | &elfsym, o)) | |
3346 | goto error_return; | |
3347 | } | |
ede4eed4 KR |
3348 | } |
3349 | ||
3350 | /* Allocate some memory to hold information read in from the input | |
3351 | files. */ | |
58142f10 ILT |
3352 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
3353 | finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size); | |
ede4eed4 | 3354 | finfo.internal_relocs = ((Elf_Internal_Rela *) |
58142f10 ILT |
3355 | bfd_malloc (max_internal_reloc_count |
3356 | * sizeof (Elf_Internal_Rela))); | |
ede4eed4 | 3357 | finfo.external_syms = ((Elf_External_Sym *) |
58142f10 ILT |
3358 | bfd_malloc (max_sym_count |
3359 | * sizeof (Elf_External_Sym))); | |
ede4eed4 | 3360 | finfo.internal_syms = ((Elf_Internal_Sym *) |
58142f10 ILT |
3361 | bfd_malloc (max_sym_count |
3362 | * sizeof (Elf_Internal_Sym))); | |
3363 | finfo.indices = (long *) bfd_malloc (max_sym_count * sizeof (long)); | |
3364 | finfo.sections = ((asection **) | |
3365 | bfd_malloc (max_sym_count * sizeof (asection *))); | |
ede4eed4 KR |
3366 | if ((finfo.contents == NULL && max_contents_size != 0) |
3367 | || (finfo.external_relocs == NULL && max_external_reloc_size != 0) | |
3368 | || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0) | |
3369 | || (finfo.external_syms == NULL && max_sym_count != 0) | |
3370 | || (finfo.internal_syms == NULL && max_sym_count != 0) | |
3371 | || (finfo.indices == NULL && max_sym_count != 0) | |
3372 | || (finfo.sections == NULL && max_sym_count != 0)) | |
58142f10 | 3373 | goto error_return; |
ede4eed4 KR |
3374 | |
3375 | /* Since ELF permits relocations to be against local symbols, we | |
3376 | must have the local symbols available when we do the relocations. | |
3377 | Since we would rather only read the local symbols once, and we | |
3378 | would rather not keep them in memory, we handle all the | |
3379 | relocations for a single input file at the same time. | |
3380 | ||
3381 | Unfortunately, there is no way to know the total number of local | |
3382 | symbols until we have seen all of them, and the local symbol | |
3383 | indices precede the global symbol indices. This means that when | |
3384 | we are generating relocateable output, and we see a reloc against | |
3385 | a global symbol, we can not know the symbol index until we have | |
3386 | finished examining all the local symbols to see which ones we are | |
3387 | going to output. To deal with this, we keep the relocations in | |
3388 | memory, and don't output them until the end of the link. This is | |
3389 | an unfortunate waste of memory, but I don't see a good way around | |
3390 | it. Fortunately, it only happens when performing a relocateable | |
3391 | link, which is not the common case. FIXME: If keep_memory is set | |
3392 | we could write the relocs out and then read them again; I don't | |
3393 | know how bad the memory loss will be. */ | |
3394 | ||
3395 | for (sub = info->input_bfds; sub != NULL; sub = sub->next) | |
3396 | sub->output_has_begun = false; | |
3397 | for (o = abfd->sections; o != NULL; o = o->next) | |
3398 | { | |
3399 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3400 | { | |
3401 | if (p->type == bfd_indirect_link_order | |
3402 | && (bfd_get_flavour (p->u.indirect.section->owner) | |
3403 | == bfd_target_elf_flavour)) | |
3404 | { | |
3405 | sub = p->u.indirect.section->owner; | |
3406 | if (! sub->output_has_begun) | |
3407 | { | |
3408 | if (! elf_link_input_bfd (&finfo, sub)) | |
3409 | goto error_return; | |
3410 | sub->output_has_begun = true; | |
3411 | } | |
3412 | } | |
3413 | else if (p->type == bfd_section_reloc_link_order | |
3414 | || p->type == bfd_symbol_reloc_link_order) | |
3415 | { | |
3416 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
3417 | goto error_return; | |
3418 | } | |
3419 | else | |
3420 | { | |
3421 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
3422 | goto error_return; | |
3423 | } | |
3424 | } | |
3425 | } | |
3426 | ||
3427 | /* That wrote out all the local symbols. Finish up the symbol table | |
3428 | with the global symbols. */ | |
3429 | ||
52c92c7f ILT |
3430 | if (info->strip != strip_all && info->shared) |
3431 | { | |
3432 | /* Output any global symbols that got converted to local in a | |
3433 | version script. We do this in a separate step since ELF | |
3434 | requires all local symbols to appear prior to any global | |
3435 | symbols. FIXME: We should only do this if some global | |
3436 | symbols were, in fact, converted to become local. FIXME: | |
3437 | Will this work correctly with the Irix 5 linker? */ | |
3438 | eoinfo.failed = false; | |
3439 | eoinfo.finfo = &finfo; | |
3440 | eoinfo.localsyms = true; | |
3441 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
3442 | (PTR) &eoinfo); | |
3443 | if (eoinfo.failed) | |
3444 | return false; | |
3445 | } | |
3446 | ||
ede4eed4 KR |
3447 | /* The sh_info field records the index of the first non local |
3448 | symbol. */ | |
3449 | symtab_hdr->sh_info = abfd->symcount; | |
3450 | if (dynamic) | |
3451 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1; | |
3452 | ||
3453 | /* We get the global symbols from the hash table. */ | |
52c92c7f ILT |
3454 | eoinfo.failed = false; |
3455 | eoinfo.localsyms = false; | |
3456 | eoinfo.finfo = &finfo; | |
ede4eed4 | 3457 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
52c92c7f ILT |
3458 | (PTR) &eoinfo); |
3459 | if (eoinfo.failed) | |
ede4eed4 KR |
3460 | return false; |
3461 | ||
3462 | /* Flush all symbols to the file. */ | |
3463 | if (! elf_link_flush_output_syms (&finfo)) | |
3464 | return false; | |
3465 | ||
3466 | /* Now we know the size of the symtab section. */ | |
3467 | off += symtab_hdr->sh_size; | |
3468 | ||
3469 | /* Finish up and write out the symbol string table (.strtab) | |
3470 | section. */ | |
3471 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
3472 | /* sh_name was set in prep_headers. */ | |
3473 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
3474 | symstrtab_hdr->sh_flags = 0; | |
3475 | symstrtab_hdr->sh_addr = 0; | |
3476 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
3477 | symstrtab_hdr->sh_entsize = 0; | |
3478 | symstrtab_hdr->sh_link = 0; | |
3479 | symstrtab_hdr->sh_info = 0; | |
3480 | /* sh_offset is set just below. */ | |
3481 | symstrtab_hdr->sh_addralign = 1; | |
3482 | ||
3483 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, true); | |
3484 | elf_tdata (abfd)->next_file_pos = off; | |
3485 | ||
28c16b55 ILT |
3486 | if (abfd->symcount > 0) |
3487 | { | |
3488 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
3489 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
3490 | return false; | |
3491 | } | |
ede4eed4 KR |
3492 | |
3493 | /* Adjust the relocs to have the correct symbol indices. */ | |
3494 | for (o = abfd->sections; o != NULL; o = o->next) | |
3495 | { | |
3496 | struct elf_link_hash_entry **rel_hash; | |
3497 | Elf_Internal_Shdr *rel_hdr; | |
3498 | ||
3499 | if ((o->flags & SEC_RELOC) == 0) | |
3500 | continue; | |
3501 | ||
3502 | rel_hash = elf_section_data (o)->rel_hashes; | |
3503 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
3504 | for (i = 0; i < o->reloc_count; i++, rel_hash++) | |
3505 | { | |
3506 | if (*rel_hash == NULL) | |
3507 | continue; | |
ff12f303 | 3508 | |
ede4eed4 KR |
3509 | BFD_ASSERT ((*rel_hash)->indx >= 0); |
3510 | ||
3511 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
3512 | { | |
3513 | Elf_External_Rel *erel; | |
3514 | Elf_Internal_Rel irel; | |
3515 | ||
3516 | erel = (Elf_External_Rel *) rel_hdr->contents + i; | |
3517 | elf_swap_reloc_in (abfd, erel, &irel); | |
3518 | irel.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
3519 | ELF_R_TYPE (irel.r_info)); | |
3520 | elf_swap_reloc_out (abfd, &irel, erel); | |
3521 | } | |
3522 | else | |
3523 | { | |
3524 | Elf_External_Rela *erela; | |
3525 | Elf_Internal_Rela irela; | |
3526 | ||
3527 | BFD_ASSERT (rel_hdr->sh_entsize | |
3528 | == sizeof (Elf_External_Rela)); | |
3529 | ||
3530 | erela = (Elf_External_Rela *) rel_hdr->contents + i; | |
3531 | elf_swap_reloca_in (abfd, erela, &irela); | |
3532 | irela.r_info = ELF_R_INFO ((*rel_hash)->indx, | |
3533 | ELF_R_TYPE (irela.r_info)); | |
3534 | elf_swap_reloca_out (abfd, &irela, erela); | |
3535 | } | |
3536 | } | |
3537 | ||
3538 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
3539 | trying to swap the relocs out itself. */ | |
3540 | o->reloc_count = 0; | |
3541 | } | |
3542 | ||
3543 | /* If we are linking against a dynamic object, or generating a | |
3544 | shared library, finish up the dynamic linking information. */ | |
3545 | if (dynamic) | |
3546 | { | |
3547 | Elf_External_Dyn *dyncon, *dynconend; | |
3548 | ||
3549 | /* Fix up .dynamic entries. */ | |
3550 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3551 | BFD_ASSERT (o != NULL); | |
3552 | ||
3553 | dyncon = (Elf_External_Dyn *) o->contents; | |
3554 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
3555 | for (; dyncon < dynconend; dyncon++) | |
3556 | { | |
3557 | Elf_Internal_Dyn dyn; | |
3558 | const char *name; | |
3559 | unsigned int type; | |
3560 | ||
3561 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
3562 | ||
3563 | switch (dyn.d_tag) | |
3564 | { | |
3565 | default: | |
3566 | break; | |
3567 | ||
3568 | /* SVR4 linkers seem to set DT_INIT and DT_FINI based on | |
3569 | magic _init and _fini symbols. This is pretty ugly, | |
3570 | but we are compatible. */ | |
3571 | case DT_INIT: | |
3572 | name = "_init"; | |
3573 | goto get_sym; | |
3574 | case DT_FINI: | |
3575 | name = "_fini"; | |
3576 | get_sym: | |
3577 | { | |
3578 | struct elf_link_hash_entry *h; | |
3579 | ||
3580 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
3581 | false, false, true); | |
d6f672b8 ILT |
3582 | if (h != NULL |
3583 | && (h->root.type == bfd_link_hash_defined | |
3584 | || h->root.type == bfd_link_hash_defweak)) | |
ede4eed4 KR |
3585 | { |
3586 | dyn.d_un.d_val = h->root.u.def.value; | |
3587 | o = h->root.u.def.section; | |
3588 | if (o->output_section != NULL) | |
3589 | dyn.d_un.d_val += (o->output_section->vma | |
3590 | + o->output_offset); | |
3591 | else | |
d6f672b8 ILT |
3592 | { |
3593 | /* The symbol is imported from another shared | |
3594 | library and does not apply to this one. */ | |
3595 | dyn.d_un.d_val = 0; | |
3596 | } | |
3597 | ||
3598 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
ede4eed4 | 3599 | } |
ede4eed4 KR |
3600 | } |
3601 | break; | |
3602 | ||
3603 | case DT_HASH: | |
3604 | name = ".hash"; | |
3605 | goto get_vma; | |
3606 | case DT_STRTAB: | |
3607 | name = ".dynstr"; | |
3608 | goto get_vma; | |
3609 | case DT_SYMTAB: | |
3610 | name = ".dynsym"; | |
d044b40a ILT |
3611 | goto get_vma; |
3612 | case DT_VERDEF: | |
3613 | name = ".gnu.version_d"; | |
3614 | goto get_vma; | |
3615 | case DT_VERNEED: | |
3616 | name = ".gnu.version_r"; | |
3617 | goto get_vma; | |
3618 | case DT_VERSYM: | |
3619 | name = ".gnu.version"; | |
ede4eed4 KR |
3620 | get_vma: |
3621 | o = bfd_get_section_by_name (abfd, name); | |
3622 | BFD_ASSERT (o != NULL); | |
3623 | dyn.d_un.d_ptr = o->vma; | |
3624 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3625 | break; | |
3626 | ||
3627 | case DT_REL: | |
3628 | case DT_RELA: | |
3629 | case DT_RELSZ: | |
3630 | case DT_RELASZ: | |
3631 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
3632 | type = SHT_REL; | |
3633 | else | |
3634 | type = SHT_RELA; | |
3635 | dyn.d_un.d_val = 0; | |
3636 | for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++) | |
3637 | { | |
3638 | Elf_Internal_Shdr *hdr; | |
3639 | ||
3640 | hdr = elf_elfsections (abfd)[i]; | |
3641 | if (hdr->sh_type == type | |
3642 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
3643 | { | |
3644 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
3645 | dyn.d_un.d_val += hdr->sh_size; | |
3646 | else | |
3647 | { | |
3648 | if (dyn.d_un.d_val == 0 | |
3649 | || hdr->sh_addr < dyn.d_un.d_val) | |
3650 | dyn.d_un.d_val = hdr->sh_addr; | |
3651 | } | |
3652 | } | |
3653 | } | |
3654 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3655 | break; | |
3656 | } | |
3657 | } | |
3658 | } | |
3659 | ||
3660 | /* If we have created any dynamic sections, then output them. */ | |
3661 | if (dynobj != NULL) | |
3662 | { | |
3663 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
3664 | goto error_return; | |
3665 | ||
3666 | for (o = dynobj->sections; o != NULL; o = o->next) | |
3667 | { | |
3668 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
3669 | || o->_raw_size == 0) | |
3670 | continue; | |
ff12f303 | 3671 | if ((o->flags & SEC_LINKER_CREATED) == 0) |
ede4eed4 KR |
3672 | { |
3673 | /* At this point, we are only interested in sections | |
ff12f303 | 3674 | created by elf_link_create_dynamic_sections. */ |
ede4eed4 KR |
3675 | continue; |
3676 | } | |
3677 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
3678 | != SHT_STRTAB) | |
3679 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
3680 | { | |
3681 | if (! bfd_set_section_contents (abfd, o->output_section, | |
3682 | o->contents, o->output_offset, | |
3683 | o->_raw_size)) | |
3684 | goto error_return; | |
3685 | } | |
3686 | else | |
3687 | { | |
3688 | file_ptr off; | |
3689 | ||
3690 | /* The contents of the .dynstr section are actually in a | |
3691 | stringtab. */ | |
3692 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; | |
3693 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
3694 | || ! _bfd_stringtab_emit (abfd, | |
3695 | elf_hash_table (info)->dynstr)) | |
3696 | goto error_return; | |
3697 | } | |
3698 | } | |
3699 | } | |
3700 | ||
1726b8f0 ILT |
3701 | /* If we have optimized stabs strings, output them. */ |
3702 | if (elf_hash_table (info)->stab_info != NULL) | |
3703 | { | |
3704 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
3705 | goto error_return; | |
3706 | } | |
3707 | ||
ede4eed4 KR |
3708 | if (finfo.symstrtab != NULL) |
3709 | _bfd_stringtab_free (finfo.symstrtab); | |
3710 | if (finfo.contents != NULL) | |
3711 | free (finfo.contents); | |
3712 | if (finfo.external_relocs != NULL) | |
3713 | free (finfo.external_relocs); | |
3714 | if (finfo.internal_relocs != NULL) | |
3715 | free (finfo.internal_relocs); | |
3716 | if (finfo.external_syms != NULL) | |
3717 | free (finfo.external_syms); | |
3718 | if (finfo.internal_syms != NULL) | |
3719 | free (finfo.internal_syms); | |
3720 | if (finfo.indices != NULL) | |
3721 | free (finfo.indices); | |
3722 | if (finfo.sections != NULL) | |
3723 | free (finfo.sections); | |
3724 | if (finfo.symbuf != NULL) | |
3725 | free (finfo.symbuf); | |
3726 | for (o = abfd->sections; o != NULL; o = o->next) | |
3727 | { | |
3728 | if ((o->flags & SEC_RELOC) != 0 | |
3729 | && elf_section_data (o)->rel_hashes != NULL) | |
3730 | free (elf_section_data (o)->rel_hashes); | |
3731 | } | |
3732 | ||
3733 | elf_tdata (abfd)->linker = true; | |
3734 | ||
3735 | return true; | |
3736 | ||
3737 | error_return: | |
3738 | if (finfo.symstrtab != NULL) | |
3739 | _bfd_stringtab_free (finfo.symstrtab); | |
3740 | if (finfo.contents != NULL) | |
3741 | free (finfo.contents); | |
3742 | if (finfo.external_relocs != NULL) | |
3743 | free (finfo.external_relocs); | |
3744 | if (finfo.internal_relocs != NULL) | |
3745 | free (finfo.internal_relocs); | |
3746 | if (finfo.external_syms != NULL) | |
3747 | free (finfo.external_syms); | |
3748 | if (finfo.internal_syms != NULL) | |
3749 | free (finfo.internal_syms); | |
3750 | if (finfo.indices != NULL) | |
3751 | free (finfo.indices); | |
3752 | if (finfo.sections != NULL) | |
3753 | free (finfo.sections); | |
3754 | if (finfo.symbuf != NULL) | |
3755 | free (finfo.symbuf); | |
3756 | for (o = abfd->sections; o != NULL; o = o->next) | |
3757 | { | |
3758 | if ((o->flags & SEC_RELOC) != 0 | |
3759 | && elf_section_data (o)->rel_hashes != NULL) | |
3760 | free (elf_section_data (o)->rel_hashes); | |
3761 | } | |
3762 | ||
3763 | return false; | |
3764 | } | |
3765 | ||
3766 | /* Add a symbol to the output symbol table. */ | |
3767 | ||
3768 | static boolean | |
3769 | elf_link_output_sym (finfo, name, elfsym, input_sec) | |
3770 | struct elf_final_link_info *finfo; | |
3771 | const char *name; | |
3772 | Elf_Internal_Sym *elfsym; | |
3773 | asection *input_sec; | |
3774 | { | |
3775 | boolean (*output_symbol_hook) PARAMS ((bfd *, | |
3776 | struct bfd_link_info *info, | |
3777 | const char *, | |
3778 | Elf_Internal_Sym *, | |
3779 | asection *)); | |
3780 | ||
3781 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
3782 | elf_backend_link_output_symbol_hook; | |
3783 | if (output_symbol_hook != NULL) | |
3784 | { | |
3785 | if (! ((*output_symbol_hook) | |
3786 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
3787 | return false; | |
3788 | } | |
3789 | ||
3790 | if (name == (const char *) NULL || *name == '\0') | |
3791 | elfsym->st_name = 0; | |
3792 | else | |
3793 | { | |
3794 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
3795 | name, true, | |
3796 | false); | |
3797 | if (elfsym->st_name == (unsigned long) -1) | |
3798 | return false; | |
3799 | } | |
3800 | ||
3801 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
3802 | { | |
3803 | if (! elf_link_flush_output_syms (finfo)) | |
3804 | return false; | |
3805 | } | |
3806 | ||
3807 | elf_swap_symbol_out (finfo->output_bfd, elfsym, | |
cf9fb9f2 | 3808 | (PTR) (finfo->symbuf + finfo->symbuf_count)); |
ede4eed4 KR |
3809 | ++finfo->symbuf_count; |
3810 | ||
3811 | ++finfo->output_bfd->symcount; | |
3812 | ||
3813 | return true; | |
3814 | } | |
3815 | ||
3816 | /* Flush the output symbols to the file. */ | |
3817 | ||
3818 | static boolean | |
3819 | elf_link_flush_output_syms (finfo) | |
3820 | struct elf_final_link_info *finfo; | |
3821 | { | |
28c16b55 ILT |
3822 | if (finfo->symbuf_count > 0) |
3823 | { | |
3824 | Elf_Internal_Shdr *symtab; | |
ede4eed4 | 3825 | |
28c16b55 | 3826 | symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
ede4eed4 | 3827 | |
28c16b55 ILT |
3828 | if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size, |
3829 | SEEK_SET) != 0 | |
3830 | || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count, | |
3831 | sizeof (Elf_External_Sym), finfo->output_bfd) | |
3832 | != finfo->symbuf_count * sizeof (Elf_External_Sym))) | |
3833 | return false; | |
ede4eed4 | 3834 | |
28c16b55 | 3835 | symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym); |
ede4eed4 | 3836 | |
28c16b55 ILT |
3837 | finfo->symbuf_count = 0; |
3838 | } | |
ede4eed4 KR |
3839 | |
3840 | return true; | |
3841 | } | |
3842 | ||
3843 | /* Add an external symbol to the symbol table. This is called from | |
52c92c7f ILT |
3844 | the hash table traversal routine. When generating a shared object, |
3845 | we go through the symbol table twice. The first time we output | |
3846 | anything that might have been forced to local scope in a version | |
3847 | script. The second time we output the symbols that are still | |
3848 | global symbols. */ | |
ede4eed4 KR |
3849 | |
3850 | static boolean | |
3851 | elf_link_output_extsym (h, data) | |
3852 | struct elf_link_hash_entry *h; | |
3853 | PTR data; | |
3854 | { | |
52c92c7f ILT |
3855 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
3856 | struct elf_final_link_info *finfo = eoinfo->finfo; | |
ede4eed4 KR |
3857 | boolean strip; |
3858 | Elf_Internal_Sym sym; | |
3859 | asection *input_sec; | |
3860 | ||
52c92c7f ILT |
3861 | /* Decide whether to output this symbol in this pass. */ |
3862 | if (eoinfo->localsyms) | |
3863 | { | |
3864 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3865 | return true; | |
3866 | } | |
3867 | else | |
3868 | { | |
3869 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
3870 | return true; | |
3871 | } | |
3872 | ||
ede4eed4 KR |
3873 | /* If we are not creating a shared library, and this symbol is |
3874 | referenced by a shared library but is not defined anywhere, then | |
3875 | warn that it is undefined. If we do not do this, the runtime | |
3876 | linker will complain that the symbol is undefined when the | |
3877 | program is run. We don't have to worry about symbols that are | |
3878 | referenced by regular files, because we will already have issued | |
252239f8 | 3879 | warnings for them. */ |
ede4eed4 KR |
3880 | if (! finfo->info->relocateable |
3881 | && ! finfo->info->shared | |
3882 | && h->root.type == bfd_link_hash_undefined | |
3883 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 | |
252239f8 | 3884 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) |
ede4eed4 KR |
3885 | { |
3886 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
3887 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
3888 | (asection *) NULL, 0))) | |
3889 | { | |
52c92c7f | 3890 | eoinfo->failed = true; |
ede4eed4 KR |
3891 | return false; |
3892 | } | |
3893 | } | |
3894 | ||
3895 | /* We don't want to output symbols that have never been mentioned by | |
3896 | a regular file, or that we have been told to strip. However, if | |
3897 | h->indx is set to -2, the symbol is used by a reloc and we must | |
3898 | output it. */ | |
3899 | if (h->indx == -2) | |
3900 | strip = false; | |
3901 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3902 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
3903 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3904 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
3905 | strip = true; | |
3906 | else if (finfo->info->strip == strip_all | |
3907 | || (finfo->info->strip == strip_some | |
3908 | && bfd_hash_lookup (finfo->info->keep_hash, | |
3909 | h->root.root.string, | |
3910 | false, false) == NULL)) | |
3911 | strip = true; | |
3912 | else | |
3913 | strip = false; | |
3914 | ||
3915 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
3916 | nothing else to do. */ | |
3917 | if (strip && h->dynindx == -1) | |
3918 | return true; | |
3919 | ||
3920 | sym.st_value = 0; | |
3921 | sym.st_size = h->size; | |
6c02f1a0 | 3922 | sym.st_other = h->other; |
52c92c7f ILT |
3923 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) |
3924 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
3925 | else if (h->root.type == bfd_link_hash_undefweak | |
3926 | || h->root.type == bfd_link_hash_defweak) | |
ede4eed4 KR |
3927 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); |
3928 | else | |
3929 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
3930 | ||
3931 | switch (h->root.type) | |
3932 | { | |
3933 | default: | |
3934 | case bfd_link_hash_new: | |
3935 | abort (); | |
3936 | return false; | |
3937 | ||
3938 | case bfd_link_hash_undefined: | |
3939 | input_sec = bfd_und_section_ptr; | |
3940 | sym.st_shndx = SHN_UNDEF; | |
3941 | break; | |
3942 | ||
3943 | case bfd_link_hash_undefweak: | |
3944 | input_sec = bfd_und_section_ptr; | |
3945 | sym.st_shndx = SHN_UNDEF; | |
3946 | break; | |
3947 | ||
3948 | case bfd_link_hash_defined: | |
3949 | case bfd_link_hash_defweak: | |
3950 | { | |
3951 | input_sec = h->root.u.def.section; | |
3952 | if (input_sec->output_section != NULL) | |
3953 | { | |
3954 | sym.st_shndx = | |
3955 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
3956 | input_sec->output_section); | |
3957 | if (sym.st_shndx == (unsigned short) -1) | |
3958 | { | |
52c92c7f | 3959 | eoinfo->failed = true; |
ede4eed4 KR |
3960 | return false; |
3961 | } | |
3962 | ||
3963 | /* ELF symbols in relocateable files are section relative, | |
3964 | but in nonrelocateable files they are virtual | |
3965 | addresses. */ | |
3966 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
3967 | if (! finfo->info->relocateable) | |
3968 | sym.st_value += input_sec->output_section->vma; | |
3969 | } | |
3970 | else | |
3971 | { | |
e549b1d2 ILT |
3972 | BFD_ASSERT (input_sec->owner == NULL |
3973 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
ede4eed4 KR |
3974 | sym.st_shndx = SHN_UNDEF; |
3975 | input_sec = bfd_und_section_ptr; | |
3976 | } | |
3977 | } | |
3978 | break; | |
3979 | ||
3980 | case bfd_link_hash_common: | |
3981 | input_sec = bfd_com_section_ptr; | |
3982 | sym.st_shndx = SHN_COMMON; | |
3983 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
3984 | break; | |
3985 | ||
3986 | case bfd_link_hash_indirect: | |
d044b40a ILT |
3987 | /* These symbols are created by symbol versioning. They point |
3988 | to the decorated version of the name. For example, if the | |
3989 | symbol foo@@GNU_1.2 is the default, which should be used when | |
3990 | foo is used with no version, then we add an indirect symbol | |
d6bfcdb5 ILT |
3991 | foo which points to foo@@GNU_1.2. We ignore these symbols, |
3992 | since the indirected symbol is already in the hash table. If | |
3993 | the indirect symbol is non-ELF, fall through and output it. */ | |
3994 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) == 0) | |
d044b40a ILT |
3995 | return true; |
3996 | ||
3997 | /* Fall through. */ | |
ede4eed4 | 3998 | case bfd_link_hash_warning: |
d044b40a ILT |
3999 | /* We can't represent these symbols in ELF, although a warning |
4000 | symbol may have come from a .gnu.warning.SYMBOL section. We | |
1f4ae0d6 ILT |
4001 | just put the target symbol in the hash table. If the target |
4002 | symbol does not really exist, don't do anything. */ | |
4003 | if (h->root.u.i.link->type == bfd_link_hash_new) | |
4004 | return true; | |
0cb70568 ILT |
4005 | return (elf_link_output_extsym |
4006 | ((struct elf_link_hash_entry *) h->root.u.i.link, data)); | |
ede4eed4 KR |
4007 | } |
4008 | ||
4009 | /* If this symbol should be put in the .dynsym section, then put it | |
4010 | there now. We have already know the symbol index. We also fill | |
4011 | in the entry in the .hash section. */ | |
4012 | if (h->dynindx != -1 | |
4013 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
4014 | { | |
4015 | struct elf_backend_data *bed; | |
d044b40a ILT |
4016 | char *p, *copy; |
4017 | const char *name; | |
ede4eed4 KR |
4018 | size_t bucketcount; |
4019 | size_t bucket; | |
4020 | bfd_byte *bucketpos; | |
4021 | bfd_vma chain; | |
4022 | ||
4023 | sym.st_name = h->dynstr_index; | |
4024 | ||
4025 | /* Give the processor backend a chance to tweak the symbol | |
4026 | value, and also to finish up anything that needs to be done | |
4027 | for this symbol. */ | |
4028 | bed = get_elf_backend_data (finfo->output_bfd); | |
4029 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
4030 | (finfo->output_bfd, finfo->info, h, &sym))) | |
4031 | { | |
52c92c7f | 4032 | eoinfo->failed = true; |
ede4eed4 KR |
4033 | return false; |
4034 | } | |
4035 | ||
4036 | elf_swap_symbol_out (finfo->output_bfd, &sym, | |
cf9fb9f2 ILT |
4037 | (PTR) (((Elf_External_Sym *) |
4038 | finfo->dynsym_sec->contents) | |
4039 | + h->dynindx)); | |
ede4eed4 | 4040 | |
d044b40a ILT |
4041 | /* We didn't include the version string in the dynamic string |
4042 | table, so we must not consider it in the hash table. */ | |
4043 | name = h->root.root.string; | |
4044 | p = strchr (name, ELF_VER_CHR); | |
4045 | if (p == NULL) | |
4046 | copy = NULL; | |
4047 | else | |
4048 | { | |
4049 | copy = bfd_alloc (finfo->output_bfd, p - name + 1); | |
4050 | strncpy (copy, name, p - name); | |
4051 | copy[p - name] = '\0'; | |
4052 | name = copy; | |
4053 | } | |
4054 | ||
ede4eed4 | 4055 | bucketcount = elf_hash_table (finfo->info)->bucketcount; |
d044b40a | 4056 | bucket = bfd_elf_hash ((const unsigned char *) name) % bucketcount; |
ede4eed4 KR |
4057 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
4058 | + (bucket + 2) * (ARCH_SIZE / 8)); | |
4059 | chain = get_word (finfo->output_bfd, bucketpos); | |
4060 | put_word (finfo->output_bfd, h->dynindx, bucketpos); | |
4061 | put_word (finfo->output_bfd, chain, | |
4062 | ((bfd_byte *) finfo->hash_sec->contents | |
4063 | + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8))); | |
d044b40a ILT |
4064 | |
4065 | if (copy != NULL) | |
4066 | bfd_release (finfo->output_bfd, copy); | |
4067 | ||
4068 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
4069 | { | |
4070 | Elf_Internal_Versym iversym; | |
4071 | ||
4072 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
4073 | { | |
4074 | if (h->verinfo.verdef == NULL) | |
4075 | iversym.vs_vers = 0; | |
4076 | else | |
4077 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
4078 | } | |
4079 | else | |
4080 | { | |
4081 | if (h->verinfo.vertree == NULL) | |
4082 | iversym.vs_vers = 1; | |
4083 | else | |
4084 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
4085 | } | |
4086 | ||
4087 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
4088 | iversym.vs_vers |= VERSYM_HIDDEN; | |
4089 | ||
4090 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, | |
4091 | (((Elf_External_Versym *) | |
4092 | finfo->symver_sec->contents) | |
4093 | + h->dynindx)); | |
4094 | } | |
ede4eed4 KR |
4095 | } |
4096 | ||
4097 | /* If we're stripping it, then it was just a dynamic symbol, and | |
4098 | there's nothing else to do. */ | |
4099 | if (strip) | |
4100 | return true; | |
4101 | ||
4102 | h->indx = finfo->output_bfd->symcount; | |
4103 | ||
4104 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) | |
4105 | { | |
52c92c7f | 4106 | eoinfo->failed = true; |
ede4eed4 KR |
4107 | return false; |
4108 | } | |
4109 | ||
4110 | return true; | |
4111 | } | |
4112 | ||
4113 | /* Link an input file into the linker output file. This function | |
4114 | handles all the sections and relocations of the input file at once. | |
4115 | This is so that we only have to read the local symbols once, and | |
4116 | don't have to keep them in memory. */ | |
4117 | ||
4118 | static boolean | |
4119 | elf_link_input_bfd (finfo, input_bfd) | |
4120 | struct elf_final_link_info *finfo; | |
4121 | bfd *input_bfd; | |
4122 | { | |
4123 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
4124 | bfd *, asection *, bfd_byte *, | |
4125 | Elf_Internal_Rela *, | |
4126 | Elf_Internal_Sym *, asection **)); | |
4127 | bfd *output_bfd; | |
4128 | Elf_Internal_Shdr *symtab_hdr; | |
4129 | size_t locsymcount; | |
4130 | size_t extsymoff; | |
c86158e5 | 4131 | Elf_External_Sym *external_syms; |
ede4eed4 KR |
4132 | Elf_External_Sym *esym; |
4133 | Elf_External_Sym *esymend; | |
4134 | Elf_Internal_Sym *isym; | |
4135 | long *pindex; | |
4136 | asection **ppsection; | |
4137 | asection *o; | |
4138 | ||
4139 | output_bfd = finfo->output_bfd; | |
4140 | relocate_section = | |
4141 | get_elf_backend_data (output_bfd)->elf_backend_relocate_section; | |
4142 | ||
4143 | /* If this is a dynamic object, we don't want to do anything here: | |
4144 | we don't want the local symbols, and we don't want the section | |
4145 | contents. */ | |
d044b40a | 4146 | if ((input_bfd->flags & DYNAMIC) != 0) |
ede4eed4 KR |
4147 | return true; |
4148 | ||
4149 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
4150 | if (elf_bad_symtab (input_bfd)) | |
4151 | { | |
4152 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
4153 | extsymoff = 0; | |
4154 | } | |
4155 | else | |
4156 | { | |
4157 | locsymcount = symtab_hdr->sh_info; | |
4158 | extsymoff = symtab_hdr->sh_info; | |
4159 | } | |
4160 | ||
4161 | /* Read the local symbols. */ | |
c86158e5 ILT |
4162 | if (symtab_hdr->contents != NULL) |
4163 | external_syms = (Elf_External_Sym *) symtab_hdr->contents; | |
4164 | else if (locsymcount == 0) | |
4165 | external_syms = NULL; | |
4166 | else | |
4167 | { | |
4168 | external_syms = finfo->external_syms; | |
4169 | if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0 | |
4170 | || (bfd_read (external_syms, sizeof (Elf_External_Sym), | |
ede4eed4 | 4171 | locsymcount, input_bfd) |
c86158e5 ILT |
4172 | != locsymcount * sizeof (Elf_External_Sym))) |
4173 | return false; | |
4174 | } | |
ede4eed4 KR |
4175 | |
4176 | /* Swap in the local symbols and write out the ones which we know | |
4177 | are going into the output file. */ | |
c86158e5 | 4178 | esym = external_syms; |
ede4eed4 KR |
4179 | esymend = esym + locsymcount; |
4180 | isym = finfo->internal_syms; | |
4181 | pindex = finfo->indices; | |
4182 | ppsection = finfo->sections; | |
4183 | for (; esym < esymend; esym++, isym++, pindex++, ppsection++) | |
4184 | { | |
4185 | asection *isec; | |
4186 | const char *name; | |
4187 | Elf_Internal_Sym osym; | |
4188 | ||
4189 | elf_swap_symbol_in (input_bfd, esym, isym); | |
4190 | *pindex = -1; | |
4191 | ||
4192 | if (elf_bad_symtab (input_bfd)) | |
4193 | { | |
4194 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
4195 | { | |
4196 | *ppsection = NULL; | |
4197 | continue; | |
4198 | } | |
4199 | } | |
4200 | ||
4201 | if (isym->st_shndx == SHN_UNDEF) | |
4202 | isec = bfd_und_section_ptr; | |
4203 | else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE) | |
4204 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
4205 | else if (isym->st_shndx == SHN_ABS) | |
4206 | isec = bfd_abs_section_ptr; | |
4207 | else if (isym->st_shndx == SHN_COMMON) | |
4208 | isec = bfd_com_section_ptr; | |
4209 | else | |
4210 | { | |
4211 | /* Who knows? */ | |
4212 | isec = NULL; | |
4213 | } | |
4214 | ||
4215 | *ppsection = isec; | |
4216 | ||
4217 | /* Don't output the first, undefined, symbol. */ | |
c86158e5 | 4218 | if (esym == external_syms) |
ede4eed4 KR |
4219 | continue; |
4220 | ||
4221 | /* If we are stripping all symbols, we don't want to output this | |
4222 | one. */ | |
4223 | if (finfo->info->strip == strip_all) | |
4224 | continue; | |
4225 | ||
4226 | /* We never output section symbols. Instead, we use the section | |
4227 | symbol of the corresponding section in the output file. */ | |
4228 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
4229 | continue; | |
4230 | ||
4231 | /* If we are discarding all local symbols, we don't want to | |
4232 | output this one. If we are generating a relocateable output | |
4233 | file, then some of the local symbols may be required by | |
4234 | relocs; we output them below as we discover that they are | |
4235 | needed. */ | |
4236 | if (finfo->info->discard == discard_all) | |
4237 | continue; | |
4238 | ||
258b1f5d | 4239 | /* If this symbol is defined in a section which we are |
fa802cb0 ILT |
4240 | discarding, we don't need to keep it, but note that |
4241 | linker_mark is only reliable for sections that have contents. | |
4242 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
4243 | as well as linker_mark. */ | |
258b1f5d ILT |
4244 | if (isym->st_shndx > 0 |
4245 | && isym->st_shndx < SHN_LORESERVE | |
4246 | && isec != NULL | |
fa802cb0 | 4247 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) |
258b1f5d ILT |
4248 | || (! finfo->info->relocateable |
4249 | && (isec->flags & SEC_EXCLUDE) != 0))) | |
4250 | continue; | |
4251 | ||
ede4eed4 KR |
4252 | /* Get the name of the symbol. */ |
4253 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
258b1f5d | 4254 | isym->st_name); |
ede4eed4 KR |
4255 | if (name == NULL) |
4256 | return false; | |
4257 | ||
4258 | /* See if we are discarding symbols with this name. */ | |
4259 | if ((finfo->info->strip == strip_some | |
4260 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
4261 | == NULL)) | |
4262 | || (finfo->info->discard == discard_l | |
e316f514 | 4263 | && bfd_is_local_label_name (input_bfd, name))) |
ede4eed4 KR |
4264 | continue; |
4265 | ||
4266 | /* If we get here, we are going to output this symbol. */ | |
4267 | ||
4268 | osym = *isym; | |
4269 | ||
4270 | /* Adjust the section index for the output file. */ | |
4271 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
4272 | isec->output_section); | |
4273 | if (osym.st_shndx == (unsigned short) -1) | |
4274 | return false; | |
4275 | ||
4276 | *pindex = output_bfd->symcount; | |
4277 | ||
4278 | /* ELF symbols in relocateable files are section relative, but | |
4279 | in executable files they are virtual addresses. Note that | |
4280 | this code assumes that all ELF sections have an associated | |
4281 | BFD section with a reasonable value for output_offset; below | |
4282 | we assume that they also have a reasonable value for | |
4283 | output_section. Any special sections must be set up to meet | |
4284 | these requirements. */ | |
4285 | osym.st_value += isec->output_offset; | |
4286 | if (! finfo->info->relocateable) | |
4287 | osym.st_value += isec->output_section->vma; | |
4288 | ||
4289 | if (! elf_link_output_sym (finfo, name, &osym, isec)) | |
4290 | return false; | |
4291 | } | |
4292 | ||
4293 | /* Relocate the contents of each section. */ | |
4294 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
4295 | { | |
c86158e5 ILT |
4296 | bfd_byte *contents; |
4297 | ||
ff0e4a93 | 4298 | if (! o->linker_mark) |
7ec49f91 ILT |
4299 | { |
4300 | /* This section was omitted from the link. */ | |
4301 | continue; | |
4302 | } | |
4303 | ||
1726b8f0 ILT |
4304 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
4305 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
ede4eed4 KR |
4306 | continue; |
4307 | ||
ff12f303 | 4308 | if ((o->flags & SEC_LINKER_CREATED) != 0) |
ede4eed4 | 4309 | { |
ff12f303 ILT |
4310 | /* Section was created by elf_link_create_dynamic_sections |
4311 | or somesuch. */ | |
ede4eed4 KR |
4312 | continue; |
4313 | } | |
4314 | ||
c86158e5 ILT |
4315 | /* Get the contents of the section. They have been cached by a |
4316 | relaxation routine. Note that o is a section in an input | |
4317 | file, so the contents field will not have been set by any of | |
4318 | the routines which work on output files. */ | |
4319 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
4320 | contents = elf_section_data (o)->this_hdr.contents; | |
4321 | else | |
4322 | { | |
4323 | contents = finfo->contents; | |
4324 | if (! bfd_get_section_contents (input_bfd, o, contents, | |
4325 | (file_ptr) 0, o->_raw_size)) | |
4326 | return false; | |
4327 | } | |
ede4eed4 KR |
4328 | |
4329 | if ((o->flags & SEC_RELOC) != 0) | |
4330 | { | |
4331 | Elf_Internal_Rela *internal_relocs; | |
4332 | ||
4333 | /* Get the swapped relocs. */ | |
c86158e5 ILT |
4334 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) |
4335 | (input_bfd, o, finfo->external_relocs, | |
4336 | finfo->internal_relocs, false)); | |
ede4eed4 KR |
4337 | if (internal_relocs == NULL |
4338 | && o->reloc_count > 0) | |
4339 | return false; | |
4340 | ||
4341 | /* Relocate the section by invoking a back end routine. | |
4342 | ||
4343 | The back end routine is responsible for adjusting the | |
4344 | section contents as necessary, and (if using Rela relocs | |
4345 | and generating a relocateable output file) adjusting the | |
4346 | reloc addend as necessary. | |
4347 | ||
4348 | The back end routine does not have to worry about setting | |
4349 | the reloc address or the reloc symbol index. | |
4350 | ||
4351 | The back end routine is given a pointer to the swapped in | |
4352 | internal symbols, and can access the hash table entries | |
4353 | for the external symbols via elf_sym_hashes (input_bfd). | |
4354 | ||
4355 | When generating relocateable output, the back end routine | |
4356 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
4357 | output symbol is going to be a section symbol | |
4358 | corresponding to the output section, which will require | |
4359 | the addend to be adjusted. */ | |
4360 | ||
4361 | if (! (*relocate_section) (output_bfd, finfo->info, | |
c86158e5 | 4362 | input_bfd, o, contents, |
ede4eed4 KR |
4363 | internal_relocs, |
4364 | finfo->internal_syms, | |
4365 | finfo->sections)) | |
4366 | return false; | |
4367 | ||
4368 | if (finfo->info->relocateable) | |
4369 | { | |
4370 | Elf_Internal_Rela *irela; | |
4371 | Elf_Internal_Rela *irelaend; | |
4372 | struct elf_link_hash_entry **rel_hash; | |
4373 | Elf_Internal_Shdr *input_rel_hdr; | |
4374 | Elf_Internal_Shdr *output_rel_hdr; | |
4375 | ||
4376 | /* Adjust the reloc addresses and symbol indices. */ | |
4377 | ||
4378 | irela = internal_relocs; | |
4379 | irelaend = irela + o->reloc_count; | |
4380 | rel_hash = (elf_section_data (o->output_section)->rel_hashes | |
4381 | + o->output_section->reloc_count); | |
4382 | for (; irela < irelaend; irela++, rel_hash++) | |
4383 | { | |
ae115e51 | 4384 | unsigned long r_symndx; |
ede4eed4 KR |
4385 | Elf_Internal_Sym *isym; |
4386 | asection *sec; | |
4387 | ||
4388 | irela->r_offset += o->output_offset; | |
4389 | ||
4390 | r_symndx = ELF_R_SYM (irela->r_info); | |
4391 | ||
4392 | if (r_symndx == 0) | |
4393 | continue; | |
4394 | ||
4395 | if (r_symndx >= locsymcount | |
4396 | || (elf_bad_symtab (input_bfd) | |
4397 | && finfo->sections[r_symndx] == NULL)) | |
4398 | { | |
4399 | long indx; | |
4400 | ||
4401 | /* This is a reloc against a global symbol. We | |
4402 | have not yet output all the local symbols, so | |
4403 | we do not know the symbol index of any global | |
4404 | symbol. We set the rel_hash entry for this | |
4405 | reloc to point to the global hash table entry | |
4406 | for this symbol. The symbol index is then | |
4407 | set at the end of elf_bfd_final_link. */ | |
4408 | indx = r_symndx - extsymoff; | |
4409 | *rel_hash = elf_sym_hashes (input_bfd)[indx]; | |
4410 | ||
4411 | /* Setting the index to -2 tells | |
4412 | elf_link_output_extsym that this symbol is | |
4413 | used by a reloc. */ | |
4414 | BFD_ASSERT ((*rel_hash)->indx < 0); | |
4415 | (*rel_hash)->indx = -2; | |
4416 | ||
4417 | continue; | |
4418 | } | |
4419 | ||
4420 | /* This is a reloc against a local symbol. */ | |
4421 | ||
4422 | *rel_hash = NULL; | |
4423 | isym = finfo->internal_syms + r_symndx; | |
4424 | sec = finfo->sections[r_symndx]; | |
4425 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
4426 | { | |
4427 | /* I suppose the backend ought to fill in the | |
4428 | section of any STT_SECTION symbol against a | |
ba4a4594 ILT |
4429 | processor specific section. If we have |
4430 | discarded a section, the output_section will | |
4431 | be the absolute section. */ | |
4432 | if (sec != NULL | |
4433 | && (bfd_is_abs_section (sec) | |
4434 | || (sec->output_section != NULL | |
4435 | && bfd_is_abs_section (sec->output_section)))) | |
ede4eed4 KR |
4436 | r_symndx = 0; |
4437 | else if (sec == NULL || sec->owner == NULL) | |
4438 | { | |
4439 | bfd_set_error (bfd_error_bad_value); | |
4440 | return false; | |
4441 | } | |
4442 | else | |
4443 | { | |
4444 | r_symndx = sec->output_section->target_index; | |
4445 | BFD_ASSERT (r_symndx != 0); | |
4446 | } | |
4447 | } | |
4448 | else | |
4449 | { | |
4450 | if (finfo->indices[r_symndx] == -1) | |
4451 | { | |
4452 | unsigned long link; | |
4453 | const char *name; | |
4454 | asection *osec; | |
4455 | ||
4456 | if (finfo->info->strip == strip_all) | |
4457 | { | |
4458 | /* You can't do ld -r -s. */ | |
4459 | bfd_set_error (bfd_error_invalid_operation); | |
4460 | return false; | |
4461 | } | |
4462 | ||
4463 | /* This symbol was skipped earlier, but | |
4464 | since it is needed by a reloc, we | |
4465 | must output it now. */ | |
4466 | link = symtab_hdr->sh_link; | |
4467 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4468 | link, | |
4469 | isym->st_name); | |
4470 | if (name == NULL) | |
4471 | return false; | |
4472 | ||
4473 | osec = sec->output_section; | |
4474 | isym->st_shndx = | |
4475 | _bfd_elf_section_from_bfd_section (output_bfd, | |
4476 | osec); | |
4477 | if (isym->st_shndx == (unsigned short) -1) | |
4478 | return false; | |
4479 | ||
4480 | isym->st_value += sec->output_offset; | |
4481 | if (! finfo->info->relocateable) | |
4482 | isym->st_value += osec->vma; | |
4483 | ||
4484 | finfo->indices[r_symndx] = output_bfd->symcount; | |
4485 | ||
4486 | if (! elf_link_output_sym (finfo, name, isym, sec)) | |
4487 | return false; | |
4488 | } | |
4489 | ||
4490 | r_symndx = finfo->indices[r_symndx]; | |
4491 | } | |
4492 | ||
4493 | irela->r_info = ELF_R_INFO (r_symndx, | |
4494 | ELF_R_TYPE (irela->r_info)); | |
4495 | } | |
4496 | ||
4497 | /* Swap out the relocs. */ | |
4498 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
4499 | output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr; | |
4500 | BFD_ASSERT (output_rel_hdr->sh_entsize | |
4501 | == input_rel_hdr->sh_entsize); | |
4502 | irela = internal_relocs; | |
4503 | irelaend = irela + o->reloc_count; | |
4504 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
4505 | { | |
4506 | Elf_External_Rel *erel; | |
4507 | ||
4508 | erel = ((Elf_External_Rel *) output_rel_hdr->contents | |
4509 | + o->output_section->reloc_count); | |
4510 | for (; irela < irelaend; irela++, erel++) | |
4511 | { | |
4512 | Elf_Internal_Rel irel; | |
4513 | ||
4514 | irel.r_offset = irela->r_offset; | |
4515 | irel.r_info = irela->r_info; | |
4516 | BFD_ASSERT (irela->r_addend == 0); | |
4517 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
4518 | } | |
4519 | } | |
4520 | else | |
4521 | { | |
4522 | Elf_External_Rela *erela; | |
4523 | ||
4524 | BFD_ASSERT (input_rel_hdr->sh_entsize | |
4525 | == sizeof (Elf_External_Rela)); | |
4526 | erela = ((Elf_External_Rela *) output_rel_hdr->contents | |
4527 | + o->output_section->reloc_count); | |
4528 | for (; irela < irelaend; irela++, erela++) | |
4529 | elf_swap_reloca_out (output_bfd, irela, erela); | |
4530 | } | |
4531 | ||
4532 | o->output_section->reloc_count += o->reloc_count; | |
4533 | } | |
4534 | } | |
4535 | ||
4536 | /* Write out the modified section contents. */ | |
1726b8f0 ILT |
4537 | if (elf_section_data (o)->stab_info == NULL) |
4538 | { | |
4539 | if (! bfd_set_section_contents (output_bfd, o->output_section, | |
c86158e5 | 4540 | contents, o->output_offset, |
1726b8f0 ILT |
4541 | (o->_cooked_size != 0 |
4542 | ? o->_cooked_size | |
4543 | : o->_raw_size))) | |
4544 | return false; | |
4545 | } | |
4546 | else | |
4547 | { | |
3cd5cf3d ILT |
4548 | if (! (_bfd_write_section_stabs |
4549 | (output_bfd, &elf_hash_table (finfo->info)->stab_info, | |
4550 | o, &elf_section_data (o)->stab_info, contents))) | |
1726b8f0 ILT |
4551 | return false; |
4552 | } | |
ede4eed4 KR |
4553 | } |
4554 | ||
4555 | return true; | |
4556 | } | |
4557 | ||
4558 | /* Generate a reloc when linking an ELF file. This is a reloc | |
4559 | requested by the linker, and does come from any input file. This | |
4560 | is used to build constructor and destructor tables when linking | |
4561 | with -Ur. */ | |
4562 | ||
4563 | static boolean | |
4564 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
4565 | bfd *output_bfd; | |
4566 | struct bfd_link_info *info; | |
4567 | asection *output_section; | |
4568 | struct bfd_link_order *link_order; | |
4569 | { | |
4570 | reloc_howto_type *howto; | |
4571 | long indx; | |
4572 | bfd_vma offset; | |
5b3b9ff6 | 4573 | bfd_vma addend; |
ede4eed4 KR |
4574 | struct elf_link_hash_entry **rel_hash_ptr; |
4575 | Elf_Internal_Shdr *rel_hdr; | |
4576 | ||
4577 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
4578 | if (howto == NULL) | |
4579 | { | |
4580 | bfd_set_error (bfd_error_bad_value); | |
4581 | return false; | |
4582 | } | |
4583 | ||
5b3b9ff6 ILT |
4584 | addend = link_order->u.reloc.p->addend; |
4585 | ||
4586 | /* Figure out the symbol index. */ | |
4587 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
4588 | + output_section->reloc_count); | |
4589 | if (link_order->type == bfd_section_reloc_link_order) | |
4590 | { | |
4591 | indx = link_order->u.reloc.p->u.section->target_index; | |
4592 | BFD_ASSERT (indx != 0); | |
4593 | *rel_hash_ptr = NULL; | |
4594 | } | |
4595 | else | |
4596 | { | |
4597 | struct elf_link_hash_entry *h; | |
4598 | ||
4599 | /* Treat a reloc against a defined symbol as though it were | |
4600 | actually against the section. */ | |
8881b321 ILT |
4601 | h = ((struct elf_link_hash_entry *) |
4602 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
4603 | link_order->u.reloc.p->u.name, | |
4604 | false, false, true)); | |
5b3b9ff6 ILT |
4605 | if (h != NULL |
4606 | && (h->root.type == bfd_link_hash_defined | |
4607 | || h->root.type == bfd_link_hash_defweak)) | |
4608 | { | |
4609 | asection *section; | |
4610 | ||
4611 | section = h->root.u.def.section; | |
4612 | indx = section->output_section->target_index; | |
4613 | *rel_hash_ptr = NULL; | |
4614 | /* It seems that we ought to add the symbol value to the | |
4615 | addend here, but in practice it has already been added | |
4616 | because it was passed to constructor_callback. */ | |
4617 | addend += section->output_section->vma + section->output_offset; | |
4618 | } | |
4619 | else if (h != NULL) | |
4620 | { | |
4621 | /* Setting the index to -2 tells elf_link_output_extsym that | |
4622 | this symbol is used by a reloc. */ | |
4623 | h->indx = -2; | |
4624 | *rel_hash_ptr = h; | |
4625 | indx = 0; | |
4626 | } | |
4627 | else | |
4628 | { | |
4629 | if (! ((*info->callbacks->unattached_reloc) | |
4630 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
4631 | (asection *) NULL, (bfd_vma) 0))) | |
4632 | return false; | |
4633 | indx = 0; | |
4634 | } | |
4635 | } | |
4636 | ||
ede4eed4 KR |
4637 | /* If this is an inplace reloc, we must write the addend into the |
4638 | object file. */ | |
5b3b9ff6 | 4639 | if (howto->partial_inplace && addend != 0) |
ede4eed4 KR |
4640 | { |
4641 | bfd_size_type size; | |
4642 | bfd_reloc_status_type rstat; | |
4643 | bfd_byte *buf; | |
4644 | boolean ok; | |
4645 | ||
4646 | size = bfd_get_reloc_size (howto); | |
4647 | buf = (bfd_byte *) bfd_zmalloc (size); | |
4648 | if (buf == (bfd_byte *) NULL) | |
a9713b91 | 4649 | return false; |
5b3b9ff6 | 4650 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
ede4eed4 KR |
4651 | switch (rstat) |
4652 | { | |
4653 | case bfd_reloc_ok: | |
4654 | break; | |
4655 | default: | |
4656 | case bfd_reloc_outofrange: | |
4657 | abort (); | |
4658 | case bfd_reloc_overflow: | |
4659 | if (! ((*info->callbacks->reloc_overflow) | |
4660 | (info, | |
4661 | (link_order->type == bfd_section_reloc_link_order | |
4662 | ? bfd_section_name (output_bfd, | |
4663 | link_order->u.reloc.p->u.section) | |
4664 | : link_order->u.reloc.p->u.name), | |
5b3b9ff6 ILT |
4665 | howto->name, addend, (bfd *) NULL, (asection *) NULL, |
4666 | (bfd_vma) 0))) | |
ede4eed4 KR |
4667 | { |
4668 | free (buf); | |
4669 | return false; | |
4670 | } | |
4671 | break; | |
4672 | } | |
4673 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
4674 | (file_ptr) link_order->offset, size); | |
4675 | free (buf); | |
4676 | if (! ok) | |
4677 | return false; | |
4678 | } | |
4679 | ||
ede4eed4 KR |
4680 | /* The address of a reloc is relative to the section in a |
4681 | relocateable file, and is a virtual address in an executable | |
4682 | file. */ | |
4683 | offset = link_order->offset; | |
4684 | if (! info->relocateable) | |
4685 | offset += output_section->vma; | |
4686 | ||
4687 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
4688 | ||
4689 | if (rel_hdr->sh_type == SHT_REL) | |
4690 | { | |
4691 | Elf_Internal_Rel irel; | |
4692 | Elf_External_Rel *erel; | |
4693 | ||
4694 | irel.r_offset = offset; | |
4695 | irel.r_info = ELF_R_INFO (indx, howto->type); | |
4696 | erel = ((Elf_External_Rel *) rel_hdr->contents | |
4697 | + output_section->reloc_count); | |
4698 | elf_swap_reloc_out (output_bfd, &irel, erel); | |
4699 | } | |
4700 | else | |
4701 | { | |
4702 | Elf_Internal_Rela irela; | |
4703 | Elf_External_Rela *erela; | |
4704 | ||
4705 | irela.r_offset = offset; | |
4706 | irela.r_info = ELF_R_INFO (indx, howto->type); | |
5b3b9ff6 | 4707 | irela.r_addend = addend; |
ede4eed4 KR |
4708 | erela = ((Elf_External_Rela *) rel_hdr->contents |
4709 | + output_section->reloc_count); | |
4710 | elf_swap_reloca_out (output_bfd, &irela, erela); | |
4711 | } | |
4712 | ||
4713 | ++output_section->reloc_count; | |
4714 | ||
4715 | return true; | |
4716 | } | |
4717 | ||
3b3753b8 MM |
4718 | \f |
4719 | /* Allocate a pointer to live in a linker created section. */ | |
4720 | ||
4721 | boolean | |
4722 | elf_create_pointer_linker_section (abfd, info, lsect, h, rel) | |
4723 | bfd *abfd; | |
4724 | struct bfd_link_info *info; | |
4725 | elf_linker_section_t *lsect; | |
4726 | struct elf_link_hash_entry *h; | |
4727 | const Elf_Internal_Rela *rel; | |
4728 | { | |
4729 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
4730 | elf_linker_section_pointers_t *linker_section_ptr; | |
4731 | unsigned long r_symndx = ELF_R_SYM (rel->r_info);; | |
4732 | ||
4733 | BFD_ASSERT (lsect != NULL); | |
4734 | ||
4735 | /* Is this a global symbol? */ | |
4736 | if (h != NULL) | |
4737 | { | |
4738 | /* Has this symbol already been allocated, if so, our work is done */ | |
4739 | if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer, | |
4740 | rel->r_addend, | |
4741 | lsect->which)) | |
4742 | return true; | |
4743 | ||
4744 | ptr_linker_section_ptr = &h->linker_section_pointer; | |
4745 | /* Make sure this symbol is output as a dynamic symbol. */ | |
4746 | if (h->dynindx == -1) | |
4747 | { | |
4748 | if (! elf_link_record_dynamic_symbol (info, h)) | |
4749 | return false; | |
4750 | } | |
4751 | ||
eb82bc60 MM |
4752 | if (lsect->rel_section) |
4753 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
3b3753b8 MM |
4754 | } |
4755 | ||
4756 | else /* Allocation of a pointer to a local symbol */ | |
4757 | { | |
4758 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); | |
4759 | ||
4760 | /* Allocate a table to hold the local symbols if first time */ | |
4761 | if (!ptr) | |
4762 | { | |
4763 | int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; | |
4764 | register unsigned int i; | |
4765 | ||
4766 | ptr = (elf_linker_section_pointers_t **) | |
4767 | bfd_alloc (abfd, num_symbols * sizeof (elf_linker_section_pointers_t *)); | |
4768 | ||
4769 | if (!ptr) | |
4770 | return false; | |
4771 | ||
4772 | elf_local_ptr_offsets (abfd) = ptr; | |
4773 | for (i = 0; i < num_symbols; i++) | |
4774 | ptr[i] = (elf_linker_section_pointers_t *)0; | |
4775 | } | |
4776 | ||
4777 | /* Has this symbol already been allocated, if so, our work is done */ | |
4778 | if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx], | |
4779 | rel->r_addend, | |
4780 | lsect->which)) | |
4781 | return true; | |
4782 | ||
4783 | ptr_linker_section_ptr = &ptr[r_symndx]; | |
4784 | ||
4785 | if (info->shared) | |
4786 | { | |
4787 | /* If we are generating a shared object, we need to | |
05f927dd | 4788 | output a R_<xxx>_RELATIVE reloc so that the |
3b3753b8 MM |
4789 | dynamic linker can adjust this GOT entry. */ |
4790 | BFD_ASSERT (lsect->rel_section != NULL); | |
4791 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
4792 | } | |
4793 | } | |
4794 | ||
4795 | /* Allocate space for a pointer in the linker section, and allocate a new pointer record | |
4796 | from internal memory. */ | |
4797 | BFD_ASSERT (ptr_linker_section_ptr != NULL); | |
4798 | linker_section_ptr = (elf_linker_section_pointers_t *) | |
4799 | bfd_alloc (abfd, sizeof (elf_linker_section_pointers_t)); | |
4800 | ||
4801 | if (!linker_section_ptr) | |
4802 | return false; | |
4803 | ||
4804 | linker_section_ptr->next = *ptr_linker_section_ptr; | |
4805 | linker_section_ptr->addend = rel->r_addend; | |
4806 | linker_section_ptr->which = lsect->which; | |
4807 | linker_section_ptr->written_address_p = false; | |
4808 | *ptr_linker_section_ptr = linker_section_ptr; | |
4809 | ||
cb73f5d7 | 4810 | #if 0 |
3b3753b8 MM |
4811 | if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset) |
4812 | { | |
cb73f5d7 | 4813 | linker_section_ptr->offset = lsect->section->_raw_size - lsect->hole_size + (ARCH_SIZE / 8); |
3b3753b8 MM |
4814 | lsect->hole_offset += ARCH_SIZE / 8; |
4815 | lsect->sym_offset += ARCH_SIZE / 8; | |
4816 | if (lsect->sym_hash) /* Bump up symbol value if needed */ | |
4a4953f5 MM |
4817 | { |
4818 | lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8; | |
4819 | #ifdef DEBUG | |
4820 | fprintf (stderr, "Bump up %s by %ld, current value = %ld\n", | |
4821 | lsect->sym_hash->root.root.string, | |
4822 | (long)ARCH_SIZE / 8, | |
4823 | (long)lsect->sym_hash->root.u.def.value); | |
4824 | #endif | |
4825 | } | |
3b3753b8 MM |
4826 | } |
4827 | else | |
cb73f5d7 | 4828 | #endif |
3b3753b8 MM |
4829 | linker_section_ptr->offset = lsect->section->_raw_size; |
4830 | ||
4831 | lsect->section->_raw_size += ARCH_SIZE / 8; | |
4832 | ||
4833 | #ifdef DEBUG | |
4834 | fprintf (stderr, "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
4835 | lsect->name, (long)linker_section_ptr->offset, (long)lsect->section->_raw_size); | |
4836 | #endif | |
4837 | ||
4838 | return true; | |
4839 | } | |
4840 | ||
4841 | \f | |
4842 | #if ARCH_SIZE==64 | |
4843 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR) | |
4844 | #endif | |
4845 | #if ARCH_SIZE==32 | |
4846 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR) | |
4847 | #endif | |
4848 | ||
4849 | /* Fill in the address for a pointer generated in alinker section. */ | |
4850 | ||
4851 | bfd_vma | |
4852 | elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, relocation, rel, relative_reloc) | |
4853 | bfd *output_bfd; | |
4854 | bfd *input_bfd; | |
4855 | struct bfd_link_info *info; | |
4856 | elf_linker_section_t *lsect; | |
4857 | struct elf_link_hash_entry *h; | |
4858 | bfd_vma relocation; | |
4859 | const Elf_Internal_Rela *rel; | |
4860 | int relative_reloc; | |
4861 | { | |
4862 | elf_linker_section_pointers_t *linker_section_ptr; | |
4863 | ||
4864 | BFD_ASSERT (lsect != NULL); | |
4865 | ||
3b3753b8 MM |
4866 | if (h != NULL) /* global symbol */ |
4867 | { | |
4868 | linker_section_ptr = _bfd_elf_find_pointer_linker_section (h->linker_section_pointer, | |
4869 | rel->r_addend, | |
4870 | lsect->which); | |
4871 | ||
4872 | BFD_ASSERT (linker_section_ptr != NULL); | |
4873 | ||
4874 | if (! elf_hash_table (info)->dynamic_sections_created | |
4875 | || (info->shared | |
4876 | && info->symbolic | |
4877 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
4878 | { | |
4879 | /* This is actually a static link, or it is a | |
4880 | -Bsymbolic link and the symbol is defined | |
4881 | locally. We must initialize this entry in the | |
4882 | global section. | |
4883 | ||
4884 | When doing a dynamic link, we create a .rela.<xxx> | |
4885 | relocation entry to initialize the value. This | |
4886 | is done in the finish_dynamic_symbol routine. */ | |
4887 | if (!linker_section_ptr->written_address_p) | |
4888 | { | |
4889 | linker_section_ptr->written_address_p = true; | |
4890 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, | |
4891 | lsect->section->contents + linker_section_ptr->offset); | |
4892 | } | |
4893 | } | |
4894 | } | |
4895 | else /* local symbol */ | |
4896 | { | |
4897 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
4898 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); | |
4899 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); | |
4900 | linker_section_ptr = _bfd_elf_find_pointer_linker_section (elf_local_ptr_offsets (input_bfd)[r_symndx], | |
4901 | rel->r_addend, | |
4902 | lsect->which); | |
4903 | ||
4904 | BFD_ASSERT (linker_section_ptr != NULL); | |
4905 | ||
4906 | /* Write out pointer if it hasn't been rewritten out before */ | |
4907 | if (!linker_section_ptr->written_address_p) | |
4908 | { | |
4909 | linker_section_ptr->written_address_p = true; | |
4910 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, | |
4911 | lsect->section->contents + linker_section_ptr->offset); | |
4912 | ||
4913 | if (info->shared) | |
4914 | { | |
4915 | asection *srel = lsect->rel_section; | |
4916 | Elf_Internal_Rela outrel; | |
4917 | ||
4918 | /* We need to generate a relative reloc for the dynamic linker. */ | |
4919 | if (!srel) | |
4920 | lsect->rel_section = srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
4921 | lsect->rel_name); | |
4922 | ||
4923 | BFD_ASSERT (srel != NULL); | |
4924 | ||
4925 | outrel.r_offset = (lsect->section->output_section->vma | |
4926 | + lsect->section->output_offset | |
4927 | + linker_section_ptr->offset); | |
4928 | outrel.r_info = ELF_R_INFO (0, relative_reloc); | |
4929 | outrel.r_addend = 0; | |
4930 | elf_swap_reloca_out (output_bfd, &outrel, | |
5a5bac64 | 4931 | (((Elf_External_Rela *) |
3b3753b8 MM |
4932 | lsect->section->contents) |
4933 | + lsect->section->reloc_count)); | |
4934 | ++lsect->section->reloc_count; | |
4935 | } | |
4936 | } | |
4937 | } | |
4938 | ||
4939 | relocation = (lsect->section->output_offset | |
4940 | + linker_section_ptr->offset | |
4941 | - lsect->hole_offset | |
4942 | - lsect->sym_offset); | |
4943 | ||
4944 | #ifdef DEBUG | |
4945 | fprintf (stderr, "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
4946 | lsect->name, (long)relocation, (long)relocation); | |
4947 | #endif | |
4948 | ||
4949 | /* Subtract out the addend, because it will get added back in by the normal | |
4950 | processing. */ | |
4951 | return relocation - linker_section_ptr->addend; | |
4952 | } |