Commit | Line | Data |
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252b5132 | 1 | /* ELF linker support. |
c8e5ddc8 | 2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* ELF linker code. */ | |
22 | ||
23 | /* This struct is used to pass information to routines called via | |
24 | elf_link_hash_traverse which must return failure. */ | |
25 | ||
26 | struct elf_info_failed | |
27 | { | |
28 | boolean failed; | |
29 | struct bfd_link_info *info; | |
bc2b6df7 | 30 | struct bfd_elf_version_tree *verdefs; |
252b5132 RH |
31 | }; |
32 | ||
a7b97311 AM |
33 | static boolean is_global_data_symbol_definition |
34 | PARAMS ((bfd *, Elf_Internal_Sym *)); | |
35 | static boolean elf_link_is_defined_archive_symbol | |
36 | PARAMS ((bfd *, carsym *)); | |
252b5132 RH |
37 | static boolean elf_link_add_object_symbols |
38 | PARAMS ((bfd *, struct bfd_link_info *)); | |
39 | static boolean elf_link_add_archive_symbols | |
40 | PARAMS ((bfd *, struct bfd_link_info *)); | |
41 | static boolean elf_merge_symbol | |
215007a6 L |
42 | PARAMS ((bfd *, struct bfd_link_info *, const char *, |
43 | Elf_Internal_Sym *, asection **, bfd_vma *, | |
44 | struct elf_link_hash_entry **, boolean *, boolean *, | |
45 | boolean *, boolean)); | |
46 | static boolean elf_add_default_symbol | |
47 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, | |
48 | const char *, Elf_Internal_Sym *, asection **, bfd_vma *, | |
49 | boolean *, boolean, boolean)); | |
252b5132 RH |
50 | static boolean elf_export_symbol |
51 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
2b0f7ef9 JJ |
52 | static boolean elf_finalize_dynstr |
53 | PARAMS ((bfd *, struct bfd_link_info *)); | |
252b5132 RH |
54 | static boolean elf_fix_symbol_flags |
55 | PARAMS ((struct elf_link_hash_entry *, struct elf_info_failed *)); | |
56 | static boolean elf_adjust_dynamic_symbol | |
57 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
58 | static boolean elf_link_find_version_dependencies | |
59 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
252b5132 RH |
60 | static boolean elf_link_assign_sym_version |
61 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
252b5132 RH |
62 | static boolean elf_collect_hash_codes |
63 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
3e932841 | 64 | static boolean elf_link_read_relocs_from_section |
6b5bd373 | 65 | PARAMS ((bfd *, Elf_Internal_Shdr *, PTR, Elf_Internal_Rela *)); |
a7b97311 AM |
66 | static size_t compute_bucket_count |
67 | PARAMS ((struct bfd_link_info *)); | |
41241523 | 68 | static boolean elf_link_output_relocs |
23bc299b MM |
69 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *)); |
70 | static boolean elf_link_size_reloc_section | |
71 | PARAMS ((bfd *, Elf_Internal_Shdr *, asection *)); | |
3e932841 KH |
72 | static void elf_link_adjust_relocs |
73 | PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned int, | |
31367b81 | 74 | struct elf_link_hash_entry **)); |
db6751f2 JJ |
75 | static int elf_link_sort_cmp1 |
76 | PARAMS ((const void *, const void *)); | |
77 | static int elf_link_sort_cmp2 | |
78 | PARAMS ((const void *, const void *)); | |
79 | static size_t elf_link_sort_relocs | |
80 | PARAMS ((bfd *, struct bfd_link_info *, asection **)); | |
73d074b4 DJ |
81 | static boolean elf_section_ignore_discarded_relocs |
82 | PARAMS ((asection *)); | |
252b5132 RH |
83 | |
84 | /* Given an ELF BFD, add symbols to the global hash table as | |
85 | appropriate. */ | |
86 | ||
87 | boolean | |
88 | elf_bfd_link_add_symbols (abfd, info) | |
89 | bfd *abfd; | |
90 | struct bfd_link_info *info; | |
91 | { | |
92 | switch (bfd_get_format (abfd)) | |
93 | { | |
94 | case bfd_object: | |
95 | return elf_link_add_object_symbols (abfd, info); | |
96 | case bfd_archive: | |
97 | return elf_link_add_archive_symbols (abfd, info); | |
98 | default: | |
99 | bfd_set_error (bfd_error_wrong_format); | |
100 | return false; | |
101 | } | |
102 | } | |
103 | \f | |
7da9d88f | 104 | /* Return true iff this is a non-common, definition of a non-function symbol. */ |
48dfb430 | 105 | static boolean |
7da9d88f | 106 | is_global_data_symbol_definition (abfd, sym) |
86033394 | 107 | bfd * abfd ATTRIBUTE_UNUSED; |
48dfb430 NC |
108 | Elf_Internal_Sym * sym; |
109 | { | |
110 | /* Local symbols do not count, but target specific ones might. */ | |
111 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
112 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
113 | return false; | |
114 | ||
7da9d88f NC |
115 | /* Function symbols do not count. */ |
116 | if (ELF_ST_TYPE (sym->st_info) == STT_FUNC) | |
117 | return false; | |
118 | ||
48dfb430 NC |
119 | /* If the section is undefined, then so is the symbol. */ |
120 | if (sym->st_shndx == SHN_UNDEF) | |
121 | return false; | |
3e932841 | 122 | |
48dfb430 NC |
123 | /* If the symbol is defined in the common section, then |
124 | it is a common definition and so does not count. */ | |
125 | if (sym->st_shndx == SHN_COMMON) | |
126 | return false; | |
127 | ||
128 | /* If the symbol is in a target specific section then we | |
129 | must rely upon the backend to tell us what it is. */ | |
130 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
131 | /* FIXME - this function is not coded yet: | |
3e932841 | 132 | |
48dfb430 | 133 | return _bfd_is_global_symbol_definition (abfd, sym); |
3e932841 | 134 | |
48dfb430 NC |
135 | Instead for now assume that the definition is not global, |
136 | Even if this is wrong, at least the linker will behave | |
137 | in the same way that it used to do. */ | |
138 | return false; | |
3e932841 | 139 | |
48dfb430 NC |
140 | return true; |
141 | } | |
142 | ||
a3a8c91d | 143 | /* Search the symbol table of the archive element of the archive ABFD |
4e8a9624 | 144 | whose archive map contains a mention of SYMDEF, and determine if |
a3a8c91d NC |
145 | the symbol is defined in this element. */ |
146 | static boolean | |
147 | elf_link_is_defined_archive_symbol (abfd, symdef) | |
148 | bfd * abfd; | |
149 | carsym * symdef; | |
150 | { | |
151 | Elf_Internal_Shdr * hdr; | |
dc810e39 AM |
152 | bfd_size_type symcount; |
153 | bfd_size_type extsymcount; | |
154 | bfd_size_type extsymoff; | |
6cdc0ccc AM |
155 | Elf_Internal_Sym *isymbuf; |
156 | Elf_Internal_Sym *isym; | |
157 | Elf_Internal_Sym *isymend; | |
158 | boolean result; | |
3e932841 | 159 | |
a3a8c91d NC |
160 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); |
161 | if (abfd == (bfd *) NULL) | |
162 | return false; | |
163 | ||
164 | if (! bfd_check_format (abfd, bfd_object)) | |
165 | return false; | |
166 | ||
48dfb430 NC |
167 | /* If we have already included the element containing this symbol in the |
168 | link then we do not need to include it again. Just claim that any symbol | |
169 | it contains is not a definition, so that our caller will not decide to | |
170 | (re)include this element. */ | |
171 | if (abfd->archive_pass) | |
172 | return false; | |
3e932841 | 173 | |
a3a8c91d NC |
174 | /* Select the appropriate symbol table. */ |
175 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
6cdc0ccc | 176 | hdr = &elf_tdata (abfd)->symtab_hdr; |
a3a8c91d | 177 | else |
6cdc0ccc | 178 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; |
a3a8c91d NC |
179 | |
180 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
181 | ||
182 | /* The sh_info field of the symtab header tells us where the | |
183 | external symbols start. We don't care about the local symbols. */ | |
184 | if (elf_bad_symtab (abfd)) | |
185 | { | |
186 | extsymcount = symcount; | |
187 | extsymoff = 0; | |
188 | } | |
189 | else | |
190 | { | |
191 | extsymcount = symcount - hdr->sh_info; | |
192 | extsymoff = hdr->sh_info; | |
193 | } | |
194 | ||
6cdc0ccc | 195 | if (extsymcount == 0) |
a3a8c91d NC |
196 | return false; |
197 | ||
6cdc0ccc AM |
198 | /* Read in the symbol table. */ |
199 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
200 | NULL, NULL, NULL); | |
201 | if (isymbuf == NULL) | |
202 | return false; | |
a3a8c91d NC |
203 | |
204 | /* Scan the symbol table looking for SYMDEF. */ | |
6cdc0ccc AM |
205 | result = false; |
206 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
a3a8c91d | 207 | { |
6cdc0ccc | 208 | const char *name; |
a3a8c91d | 209 | |
6cdc0ccc AM |
210 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
211 | isym->st_name); | |
a3a8c91d NC |
212 | if (name == (const char *) NULL) |
213 | break; | |
214 | ||
215 | if (strcmp (name, symdef->name) == 0) | |
216 | { | |
6cdc0ccc | 217 | result = is_global_data_symbol_definition (abfd, isym); |
a3a8c91d NC |
218 | break; |
219 | } | |
220 | } | |
221 | ||
6cdc0ccc | 222 | free (isymbuf); |
3e932841 | 223 | |
a3a8c91d NC |
224 | return result; |
225 | } | |
226 | \f | |
252b5132 RH |
227 | /* Add symbols from an ELF archive file to the linker hash table. We |
228 | don't use _bfd_generic_link_add_archive_symbols because of a | |
229 | problem which arises on UnixWare. The UnixWare libc.so is an | |
230 | archive which includes an entry libc.so.1 which defines a bunch of | |
231 | symbols. The libc.so archive also includes a number of other | |
232 | object files, which also define symbols, some of which are the same | |
233 | as those defined in libc.so.1. Correct linking requires that we | |
234 | consider each object file in turn, and include it if it defines any | |
235 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
236 | this; it looks through the list of undefined symbols, and includes | |
237 | any object file which defines them. When this algorithm is used on | |
238 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
239 | bunch of symbols. This means that some of the other objects in the | |
240 | archive are not included in the link, which is incorrect since they | |
241 | precede libc.so.1 in the archive. | |
242 | ||
243 | Fortunately, ELF archive handling is simpler than that done by | |
244 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
245 | oddities. In ELF, if we find a symbol in the archive map, and the | |
246 | symbol is currently undefined, we know that we must pull in that | |
247 | object file. | |
248 | ||
249 | Unfortunately, we do have to make multiple passes over the symbol | |
250 | table until nothing further is resolved. */ | |
251 | ||
252 | static boolean | |
253 | elf_link_add_archive_symbols (abfd, info) | |
254 | bfd *abfd; | |
255 | struct bfd_link_info *info; | |
256 | { | |
257 | symindex c; | |
258 | boolean *defined = NULL; | |
259 | boolean *included = NULL; | |
260 | carsym *symdefs; | |
261 | boolean loop; | |
dc810e39 | 262 | bfd_size_type amt; |
252b5132 RH |
263 | |
264 | if (! bfd_has_map (abfd)) | |
265 | { | |
266 | /* An empty archive is a special case. */ | |
267 | if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL) | |
268 | return true; | |
269 | bfd_set_error (bfd_error_no_armap); | |
270 | return false; | |
271 | } | |
272 | ||
273 | /* Keep track of all symbols we know to be already defined, and all | |
274 | files we know to be already included. This is to speed up the | |
275 | second and subsequent passes. */ | |
276 | c = bfd_ardata (abfd)->symdef_count; | |
277 | if (c == 0) | |
278 | return true; | |
dc810e39 AM |
279 | amt = c; |
280 | amt *= sizeof (boolean); | |
1126897b AM |
281 | defined = (boolean *) bfd_zmalloc (amt); |
282 | included = (boolean *) bfd_zmalloc (amt); | |
252b5132 RH |
283 | if (defined == (boolean *) NULL || included == (boolean *) NULL) |
284 | goto error_return; | |
252b5132 RH |
285 | |
286 | symdefs = bfd_ardata (abfd)->symdefs; | |
287 | ||
288 | do | |
289 | { | |
290 | file_ptr last; | |
291 | symindex i; | |
292 | carsym *symdef; | |
293 | carsym *symdefend; | |
294 | ||
295 | loop = false; | |
296 | last = -1; | |
297 | ||
298 | symdef = symdefs; | |
299 | symdefend = symdef + c; | |
300 | for (i = 0; symdef < symdefend; symdef++, i++) | |
301 | { | |
302 | struct elf_link_hash_entry *h; | |
303 | bfd *element; | |
304 | struct bfd_link_hash_entry *undefs_tail; | |
305 | symindex mark; | |
306 | ||
307 | if (defined[i] || included[i]) | |
308 | continue; | |
309 | if (symdef->file_offset == last) | |
310 | { | |
311 | included[i] = true; | |
312 | continue; | |
313 | } | |
314 | ||
315 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
316 | false, false, false); | |
317 | ||
318 | if (h == NULL) | |
319 | { | |
320 | char *p, *copy; | |
48fc70a2 | 321 | size_t len, first; |
252b5132 RH |
322 | |
323 | /* If this is a default version (the name contains @@), | |
48fc70a2 AM |
324 | look up the symbol again with only one `@' as well |
325 | as without the version. The effect is that references | |
326 | to the symbol with and without the version will be | |
327 | matched by the default symbol in the archive. */ | |
252b5132 RH |
328 | |
329 | p = strchr (symdef->name, ELF_VER_CHR); | |
330 | if (p == NULL || p[1] != ELF_VER_CHR) | |
331 | continue; | |
332 | ||
48fc70a2 AM |
333 | /* First check with only one `@'. */ |
334 | len = strlen (symdef->name); | |
335 | copy = bfd_alloc (abfd, (bfd_size_type) len); | |
252b5132 RH |
336 | if (copy == NULL) |
337 | goto error_return; | |
48fc70a2 AM |
338 | first = p - symdef->name + 1; |
339 | memcpy (copy, symdef->name, first); | |
340 | memcpy (copy + first, symdef->name + first + 1, len - first); | |
252b5132 RH |
341 | |
342 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
343 | false, false, false); | |
344 | ||
48fc70a2 | 345 | if (h == NULL) |
58821868 | 346 | { |
48fc70a2 AM |
347 | /* We also need to check references to the symbol |
348 | without the version. */ | |
349 | ||
350 | copy[first - 1] = '\0'; | |
351 | h = elf_link_hash_lookup (elf_hash_table (info), | |
352 | copy, false, false, false); | |
353 | } | |
354 | ||
252b5132 RH |
355 | bfd_release (abfd, copy); |
356 | } | |
357 | ||
358 | if (h == NULL) | |
359 | continue; | |
360 | ||
a3a8c91d NC |
361 | if (h->root.type == bfd_link_hash_common) |
362 | { | |
363 | /* We currently have a common symbol. The archive map contains | |
364 | a reference to this symbol, so we may want to include it. We | |
365 | only want to include it however, if this archive element | |
366 | contains a definition of the symbol, not just another common | |
367 | declaration of it. | |
368 | ||
369 | Unfortunately some archivers (including GNU ar) will put | |
370 | declarations of common symbols into their archive maps, as | |
371 | well as real definitions, so we cannot just go by the archive | |
372 | map alone. Instead we must read in the element's symbol | |
373 | table and check that to see what kind of symbol definition | |
374 | this is. */ | |
375 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
376 | continue; | |
377 | } | |
378 | else if (h->root.type != bfd_link_hash_undefined) | |
252b5132 RH |
379 | { |
380 | if (h->root.type != bfd_link_hash_undefweak) | |
381 | defined[i] = true; | |
382 | continue; | |
383 | } | |
384 | ||
385 | /* We need to include this archive member. */ | |
252b5132 RH |
386 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); |
387 | if (element == (bfd *) NULL) | |
388 | goto error_return; | |
389 | ||
390 | if (! bfd_check_format (element, bfd_object)) | |
391 | goto error_return; | |
392 | ||
393 | /* Doublecheck that we have not included this object | |
394 | already--it should be impossible, but there may be | |
395 | something wrong with the archive. */ | |
396 | if (element->archive_pass != 0) | |
397 | { | |
398 | bfd_set_error (bfd_error_bad_value); | |
399 | goto error_return; | |
400 | } | |
401 | element->archive_pass = 1; | |
402 | ||
403 | undefs_tail = info->hash->undefs_tail; | |
404 | ||
405 | if (! (*info->callbacks->add_archive_element) (info, element, | |
406 | symdef->name)) | |
407 | goto error_return; | |
408 | if (! elf_link_add_object_symbols (element, info)) | |
409 | goto error_return; | |
410 | ||
411 | /* If there are any new undefined symbols, we need to make | |
412 | another pass through the archive in order to see whether | |
413 | they can be defined. FIXME: This isn't perfect, because | |
414 | common symbols wind up on undefs_tail and because an | |
415 | undefined symbol which is defined later on in this pass | |
416 | does not require another pass. This isn't a bug, but it | |
417 | does make the code less efficient than it could be. */ | |
418 | if (undefs_tail != info->hash->undefs_tail) | |
419 | loop = true; | |
420 | ||
421 | /* Look backward to mark all symbols from this object file | |
422 | which we have already seen in this pass. */ | |
423 | mark = i; | |
424 | do | |
425 | { | |
426 | included[mark] = true; | |
427 | if (mark == 0) | |
428 | break; | |
429 | --mark; | |
430 | } | |
431 | while (symdefs[mark].file_offset == symdef->file_offset); | |
432 | ||
433 | /* We mark subsequent symbols from this object file as we go | |
434 | on through the loop. */ | |
435 | last = symdef->file_offset; | |
436 | } | |
437 | } | |
438 | while (loop); | |
439 | ||
440 | free (defined); | |
441 | free (included); | |
442 | ||
443 | return true; | |
444 | ||
445 | error_return: | |
446 | if (defined != (boolean *) NULL) | |
447 | free (defined); | |
448 | if (included != (boolean *) NULL) | |
449 | free (included); | |
450 | return false; | |
451 | } | |
452 | ||
453 | /* This function is called when we want to define a new symbol. It | |
454 | handles the various cases which arise when we find a definition in | |
455 | a dynamic object, or when there is already a definition in a | |
456 | dynamic object. The new symbol is described by NAME, SYM, PSEC, | |
457 | and PVALUE. We set SYM_HASH to the hash table entry. We set | |
458 | OVERRIDE if the old symbol is overriding a new definition. We set | |
459 | TYPE_CHANGE_OK if it is OK for the type to change. We set | |
460 | SIZE_CHANGE_OK if it is OK for the size to change. By OK to | |
461 | change, we mean that we shouldn't warn if the type or size does | |
456981d7 L |
462 | change. DT_NEEDED indicates if it comes from a DT_NEEDED entry of |
463 | a shared object. */ | |
252b5132 RH |
464 | |
465 | static boolean | |
466 | elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, | |
456981d7 | 467 | override, type_change_ok, size_change_ok, dt_needed) |
252b5132 RH |
468 | bfd *abfd; |
469 | struct bfd_link_info *info; | |
470 | const char *name; | |
471 | Elf_Internal_Sym *sym; | |
472 | asection **psec; | |
473 | bfd_vma *pvalue; | |
474 | struct elf_link_hash_entry **sym_hash; | |
475 | boolean *override; | |
476 | boolean *type_change_ok; | |
477 | boolean *size_change_ok; | |
456981d7 | 478 | boolean dt_needed; |
252b5132 RH |
479 | { |
480 | asection *sec; | |
481 | struct elf_link_hash_entry *h; | |
482 | int bind; | |
483 | bfd *oldbfd; | |
484 | boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
485 | ||
486 | *override = false; | |
487 | ||
488 | sec = *psec; | |
489 | bind = ELF_ST_BIND (sym->st_info); | |
490 | ||
491 | if (! bfd_is_und_section (sec)) | |
492 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, false, false); | |
493 | else | |
494 | h = ((struct elf_link_hash_entry *) | |
495 | bfd_wrapped_link_hash_lookup (abfd, info, name, true, false, false)); | |
496 | if (h == NULL) | |
497 | return false; | |
498 | *sym_hash = h; | |
499 | ||
500 | /* This code is for coping with dynamic objects, and is only useful | |
501 | if we are doing an ELF link. */ | |
502 | if (info->hash->creator != abfd->xvec) | |
503 | return true; | |
504 | ||
505 | /* For merging, we only care about real symbols. */ | |
506 | ||
507 | while (h->root.type == bfd_link_hash_indirect | |
508 | || h->root.type == bfd_link_hash_warning) | |
509 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
510 | ||
511 | /* If we just created the symbol, mark it as being an ELF symbol. | |
512 | Other than that, there is nothing to do--there is no merge issue | |
513 | with a newly defined symbol--so we just return. */ | |
514 | ||
515 | if (h->root.type == bfd_link_hash_new) | |
516 | { | |
517 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
518 | return true; | |
519 | } | |
520 | ||
521 | /* OLDBFD is a BFD associated with the existing symbol. */ | |
522 | ||
523 | switch (h->root.type) | |
524 | { | |
525 | default: | |
526 | oldbfd = NULL; | |
527 | break; | |
528 | ||
529 | case bfd_link_hash_undefined: | |
530 | case bfd_link_hash_undefweak: | |
531 | oldbfd = h->root.u.undef.abfd; | |
532 | break; | |
533 | ||
534 | case bfd_link_hash_defined: | |
535 | case bfd_link_hash_defweak: | |
536 | oldbfd = h->root.u.def.section->owner; | |
537 | break; | |
538 | ||
539 | case bfd_link_hash_common: | |
540 | oldbfd = h->root.u.c.p->section->owner; | |
541 | break; | |
542 | } | |
543 | ||
b4536acd ILT |
544 | /* In cases involving weak versioned symbols, we may wind up trying |
545 | to merge a symbol with itself. Catch that here, to avoid the | |
546 | confusion that results if we try to override a symbol with | |
accc7f69 ILT |
547 | itself. The additional tests catch cases like |
548 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
549 | dynamic object, which we do want to handle here. */ | |
550 | if (abfd == oldbfd | |
551 | && ((abfd->flags & DYNAMIC) == 0 | |
552 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
b4536acd ILT |
553 | return true; |
554 | ||
252b5132 RH |
555 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
556 | respectively, is from a dynamic object. */ | |
557 | ||
558 | if ((abfd->flags & DYNAMIC) != 0) | |
559 | newdyn = true; | |
560 | else | |
561 | newdyn = false; | |
562 | ||
0035bd7b ILT |
563 | if (oldbfd != NULL) |
564 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
252b5132 | 565 | else |
0035bd7b ILT |
566 | { |
567 | asection *hsec; | |
568 | ||
569 | /* This code handles the special SHN_MIPS_{TEXT,DATA} section | |
c44233aa | 570 | indices used by MIPS ELF. */ |
0035bd7b ILT |
571 | switch (h->root.type) |
572 | { | |
573 | default: | |
574 | hsec = NULL; | |
575 | break; | |
576 | ||
577 | case bfd_link_hash_defined: | |
578 | case bfd_link_hash_defweak: | |
579 | hsec = h->root.u.def.section; | |
580 | break; | |
581 | ||
582 | case bfd_link_hash_common: | |
583 | hsec = h->root.u.c.p->section; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (hsec == NULL) | |
588 | olddyn = false; | |
589 | else | |
590 | olddyn = (hsec->symbol->flags & BSF_DYNAMIC) != 0; | |
591 | } | |
252b5132 RH |
592 | |
593 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, | |
594 | respectively, appear to be a definition rather than reference. */ | |
595 | ||
596 | if (bfd_is_und_section (sec) || bfd_is_com_section (sec)) | |
597 | newdef = false; | |
598 | else | |
599 | newdef = true; | |
600 | ||
601 | if (h->root.type == bfd_link_hash_undefined | |
602 | || h->root.type == bfd_link_hash_undefweak | |
603 | || h->root.type == bfd_link_hash_common) | |
604 | olddef = false; | |
605 | else | |
606 | olddef = true; | |
607 | ||
608 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old | |
609 | symbol, respectively, appears to be a common symbol in a dynamic | |
610 | object. If a symbol appears in an uninitialized section, and is | |
611 | not weak, and is not a function, then it may be a common symbol | |
612 | which was resolved when the dynamic object was created. We want | |
613 | to treat such symbols specially, because they raise special | |
614 | considerations when setting the symbol size: if the symbol | |
615 | appears as a common symbol in a regular object, and the size in | |
616 | the regular object is larger, we must make sure that we use the | |
617 | larger size. This problematic case can always be avoided in C, | |
618 | but it must be handled correctly when using Fortran shared | |
619 | libraries. | |
620 | ||
621 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
622 | likewise for OLDDYNCOMMON and OLDDEF. | |
623 | ||
624 | Note that this test is just a heuristic, and that it is quite | |
625 | possible to have an uninitialized symbol in a shared object which | |
626 | is really a definition, rather than a common symbol. This could | |
627 | lead to some minor confusion when the symbol really is a common | |
628 | symbol in some regular object. However, I think it will be | |
629 | harmless. */ | |
630 | ||
631 | if (newdyn | |
632 | && newdef | |
633 | && (sec->flags & SEC_ALLOC) != 0 | |
634 | && (sec->flags & SEC_LOAD) == 0 | |
635 | && sym->st_size > 0 | |
636 | && bind != STB_WEAK | |
637 | && ELF_ST_TYPE (sym->st_info) != STT_FUNC) | |
638 | newdyncommon = true; | |
639 | else | |
640 | newdyncommon = false; | |
641 | ||
642 | if (olddyn | |
643 | && olddef | |
644 | && h->root.type == bfd_link_hash_defined | |
645 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
646 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 | |
647 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
648 | && h->size > 0 | |
649 | && h->type != STT_FUNC) | |
650 | olddyncommon = true; | |
651 | else | |
652 | olddyncommon = false; | |
653 | ||
654 | /* It's OK to change the type if either the existing symbol or the | |
456981d7 L |
655 | new symbol is weak unless it comes from a DT_NEEDED entry of |
656 | a shared object, in which case, the DT_NEEDED entry may not be | |
3e932841 | 657 | required at the run time. */ |
252b5132 | 658 | |
456981d7 | 659 | if ((! dt_needed && h->root.type == bfd_link_hash_defweak) |
252b5132 RH |
660 | || h->root.type == bfd_link_hash_undefweak |
661 | || bind == STB_WEAK) | |
662 | *type_change_ok = true; | |
663 | ||
664 | /* It's OK to change the size if either the existing symbol or the | |
665 | new symbol is weak, or if the old symbol is undefined. */ | |
666 | ||
667 | if (*type_change_ok | |
668 | || h->root.type == bfd_link_hash_undefined) | |
669 | *size_change_ok = true; | |
670 | ||
671 | /* If both the old and the new symbols look like common symbols in a | |
672 | dynamic object, set the size of the symbol to the larger of the | |
673 | two. */ | |
674 | ||
675 | if (olddyncommon | |
676 | && newdyncommon | |
677 | && sym->st_size != h->size) | |
678 | { | |
679 | /* Since we think we have two common symbols, issue a multiple | |
c44233aa AM |
680 | common warning if desired. Note that we only warn if the |
681 | size is different. If the size is the same, we simply let | |
682 | the old symbol override the new one as normally happens with | |
683 | symbols defined in dynamic objects. */ | |
252b5132 RH |
684 | |
685 | if (! ((*info->callbacks->multiple_common) | |
686 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
687 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
688 | return false; | |
689 | ||
690 | if (sym->st_size > h->size) | |
691 | h->size = sym->st_size; | |
692 | ||
693 | *size_change_ok = true; | |
694 | } | |
695 | ||
696 | /* If we are looking at a dynamic object, and we have found a | |
697 | definition, we need to see if the symbol was already defined by | |
698 | some other object. If so, we want to use the existing | |
699 | definition, and we do not want to report a multiple symbol | |
700 | definition error; we do this by clobbering *PSEC to be | |
701 | bfd_und_section_ptr. | |
702 | ||
703 | We treat a common symbol as a definition if the symbol in the | |
704 | shared library is a function, since common symbols always | |
705 | represent variables; this can cause confusion in principle, but | |
706 | any such confusion would seem to indicate an erroneous program or | |
707 | shared library. We also permit a common symbol in a regular | |
0525d26e ILT |
708 | object to override a weak symbol in a shared object. |
709 | ||
710 | We prefer a non-weak definition in a shared library to a weak | |
456981d7 L |
711 | definition in the executable unless it comes from a DT_NEEDED |
712 | entry of a shared object, in which case, the DT_NEEDED entry | |
3e932841 | 713 | may not be required at the run time. */ |
252b5132 RH |
714 | |
715 | if (newdyn | |
716 | && newdef | |
717 | && (olddef | |
718 | || (h->root.type == bfd_link_hash_common | |
719 | && (bind == STB_WEAK | |
0525d26e | 720 | || ELF_ST_TYPE (sym->st_info) == STT_FUNC))) |
3e932841 | 721 | && (h->root.type != bfd_link_hash_defweak |
456981d7 | 722 | || dt_needed |
0525d26e | 723 | || bind == STB_WEAK)) |
252b5132 RH |
724 | { |
725 | *override = true; | |
726 | newdef = false; | |
727 | newdyncommon = false; | |
728 | ||
729 | *psec = sec = bfd_und_section_ptr; | |
730 | *size_change_ok = true; | |
731 | ||
732 | /* If we get here when the old symbol is a common symbol, then | |
c44233aa AM |
733 | we are explicitly letting it override a weak symbol or |
734 | function in a dynamic object, and we don't want to warn about | |
735 | a type change. If the old symbol is a defined symbol, a type | |
736 | change warning may still be appropriate. */ | |
252b5132 RH |
737 | |
738 | if (h->root.type == bfd_link_hash_common) | |
739 | *type_change_ok = true; | |
740 | } | |
741 | ||
742 | /* Handle the special case of an old common symbol merging with a | |
743 | new symbol which looks like a common symbol in a shared object. | |
744 | We change *PSEC and *PVALUE to make the new symbol look like a | |
745 | common symbol, and let _bfd_generic_link_add_one_symbol will do | |
746 | the right thing. */ | |
747 | ||
748 | if (newdyncommon | |
749 | && h->root.type == bfd_link_hash_common) | |
750 | { | |
751 | *override = true; | |
752 | newdef = false; | |
753 | newdyncommon = false; | |
754 | *pvalue = sym->st_size; | |
755 | *psec = sec = bfd_com_section_ptr; | |
756 | *size_change_ok = true; | |
757 | } | |
758 | ||
759 | /* If the old symbol is from a dynamic object, and the new symbol is | |
760 | a definition which is not from a dynamic object, then the new | |
761 | symbol overrides the old symbol. Symbols from regular files | |
762 | always take precedence over symbols from dynamic objects, even if | |
763 | they are defined after the dynamic object in the link. | |
764 | ||
765 | As above, we again permit a common symbol in a regular object to | |
766 | override a definition in a shared object if the shared object | |
0525d26e ILT |
767 | symbol is a function or is weak. |
768 | ||
769 | As above, we permit a non-weak definition in a shared object to | |
770 | override a weak definition in a regular object. */ | |
252b5132 RH |
771 | |
772 | if (! newdyn | |
773 | && (newdef | |
774 | || (bfd_is_com_section (sec) | |
775 | && (h->root.type == bfd_link_hash_defweak | |
776 | || h->type == STT_FUNC))) | |
777 | && olddyn | |
778 | && olddef | |
0525d26e ILT |
779 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
780 | && (bind != STB_WEAK | |
781 | || h->root.type == bfd_link_hash_defweak)) | |
252b5132 RH |
782 | { |
783 | /* Change the hash table entry to undefined, and let | |
784 | _bfd_generic_link_add_one_symbol do the right thing with the | |
785 | new definition. */ | |
786 | ||
787 | h->root.type = bfd_link_hash_undefined; | |
788 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
789 | *size_change_ok = true; | |
790 | ||
791 | olddef = false; | |
792 | olddyncommon = false; | |
793 | ||
794 | /* We again permit a type change when a common symbol may be | |
c44233aa | 795 | overriding a function. */ |
252b5132 RH |
796 | |
797 | if (bfd_is_com_section (sec)) | |
798 | *type_change_ok = true; | |
799 | ||
800 | /* This union may have been set to be non-NULL when this symbol | |
801 | was seen in a dynamic object. We must force the union to be | |
802 | NULL, so that it is correct for a regular symbol. */ | |
803 | ||
804 | h->verinfo.vertree = NULL; | |
805 | ||
806 | /* In this special case, if H is the target of an indirection, | |
c44233aa AM |
807 | we want the caller to frob with H rather than with the |
808 | indirect symbol. That will permit the caller to redefine the | |
809 | target of the indirection, rather than the indirect symbol | |
810 | itself. FIXME: This will break the -y option if we store a | |
811 | symbol with a different name. */ | |
252b5132 RH |
812 | *sym_hash = h; |
813 | } | |
814 | ||
815 | /* Handle the special case of a new common symbol merging with an | |
816 | old symbol that looks like it might be a common symbol defined in | |
817 | a shared object. Note that we have already handled the case in | |
818 | which a new common symbol should simply override the definition | |
819 | in the shared library. */ | |
820 | ||
821 | if (! newdyn | |
822 | && bfd_is_com_section (sec) | |
823 | && olddyncommon) | |
824 | { | |
825 | /* It would be best if we could set the hash table entry to a | |
826 | common symbol, but we don't know what to use for the section | |
827 | or the alignment. */ | |
828 | if (! ((*info->callbacks->multiple_common) | |
829 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
830 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
831 | return false; | |
832 | ||
833 | /* If the predumed common symbol in the dynamic object is | |
c44233aa | 834 | larger, pretend that the new symbol has its size. */ |
252b5132 RH |
835 | |
836 | if (h->size > *pvalue) | |
837 | *pvalue = h->size; | |
838 | ||
839 | /* FIXME: We no longer know the alignment required by the symbol | |
840 | in the dynamic object, so we just wind up using the one from | |
841 | the regular object. */ | |
842 | ||
843 | olddef = false; | |
844 | olddyncommon = false; | |
845 | ||
846 | h->root.type = bfd_link_hash_undefined; | |
847 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
848 | ||
849 | *size_change_ok = true; | |
850 | *type_change_ok = true; | |
851 | ||
852 | h->verinfo.vertree = NULL; | |
853 | } | |
854 | ||
0525d26e ILT |
855 | /* Handle the special case of a weak definition in a regular object |
856 | followed by a non-weak definition in a shared object. In this | |
456981d7 L |
857 | case, we prefer the definition in the shared object unless it |
858 | comes from a DT_NEEDED entry of a shared object, in which case, | |
3e932841 | 859 | the DT_NEEDED entry may not be required at the run time. */ |
0525d26e | 860 | if (olddef |
456981d7 | 861 | && ! dt_needed |
0525d26e ILT |
862 | && h->root.type == bfd_link_hash_defweak |
863 | && newdef | |
864 | && newdyn | |
865 | && bind != STB_WEAK) | |
b4536acd ILT |
866 | { |
867 | /* To make this work we have to frob the flags so that the rest | |
c44233aa AM |
868 | of the code does not think we are using the regular |
869 | definition. */ | |
64df8d0b ILT |
870 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
871 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
872 | else if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0) | |
873 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC; | |
874 | h->elf_link_hash_flags &= ~ (ELF_LINK_HASH_DEF_REGULAR | |
875 | | ELF_LINK_HASH_DEF_DYNAMIC); | |
b4536acd ILT |
876 | |
877 | /* If H is the target of an indirection, we want the caller to | |
c44233aa AM |
878 | use H rather than the indirect symbol. Otherwise if we are |
879 | defining a new indirect symbol we will wind up attaching it | |
880 | to the entry we are overriding. */ | |
b4536acd ILT |
881 | *sym_hash = h; |
882 | } | |
0525d26e ILT |
883 | |
884 | /* Handle the special case of a non-weak definition in a shared | |
885 | object followed by a weak definition in a regular object. In | |
886 | this case we prefer to definition in the shared object. To make | |
887 | this work we have to tell the caller to not treat the new symbol | |
888 | as a definition. */ | |
889 | if (olddef | |
890 | && olddyn | |
891 | && h->root.type != bfd_link_hash_defweak | |
892 | && newdef | |
893 | && ! newdyn | |
894 | && bind == STB_WEAK) | |
895 | *override = true; | |
896 | ||
252b5132 RH |
897 | return true; |
898 | } | |
899 | ||
215007a6 L |
900 | /* This function is called to create an indirect symbol from the |
901 | default for the symbol with the default version if needed. The | |
902 | symbol is described by H, NAME, SYM, SEC, VALUE, and OVERRIDE. We | |
903 | set DYNSYM if the new indirect symbol is dynamic. DT_NEEDED | |
904 | indicates if it comes from a DT_NEEDED entry of a shared object. */ | |
905 | ||
906 | static boolean | |
907 | elf_add_default_symbol (abfd, info, h, name, sym, sec, value, | |
908 | dynsym, override, dt_needed) | |
909 | bfd *abfd; | |
910 | struct bfd_link_info *info; | |
911 | struct elf_link_hash_entry *h; | |
912 | const char *name; | |
913 | Elf_Internal_Sym *sym; | |
914 | asection **sec; | |
915 | bfd_vma *value; | |
916 | boolean *dynsym; | |
917 | boolean override; | |
918 | boolean dt_needed; | |
919 | { | |
920 | boolean type_change_ok; | |
921 | boolean size_change_ok; | |
922 | char *shortname; | |
923 | struct elf_link_hash_entry *hi; | |
924 | struct elf_backend_data *bed; | |
925 | boolean collect; | |
926 | boolean dynamic; | |
927 | char *p; | |
d4c88bbb | 928 | size_t len, shortlen; |
215007a6 L |
929 | |
930 | /* If this symbol has a version, and it is the default version, we | |
931 | create an indirect symbol from the default name to the fully | |
932 | decorated name. This will cause external references which do not | |
933 | specify a version to be bound to this version of the symbol. */ | |
934 | p = strchr (name, ELF_VER_CHR); | |
935 | if (p == NULL || p[1] != ELF_VER_CHR) | |
936 | return true; | |
937 | ||
938 | if (override) | |
939 | { | |
940 | /* We are overridden by an old defition. We need to check if we | |
d4c88bbb | 941 | need to create the indirect symbol from the default name. */ |
215007a6 L |
942 | hi = elf_link_hash_lookup (elf_hash_table (info), name, true, |
943 | false, false); | |
944 | BFD_ASSERT (hi != NULL); | |
945 | if (hi == h) | |
946 | return true; | |
947 | while (hi->root.type == bfd_link_hash_indirect | |
948 | || hi->root.type == bfd_link_hash_warning) | |
949 | { | |
950 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
951 | if (hi == h) | |
952 | return true; | |
953 | } | |
954 | } | |
955 | ||
956 | bed = get_elf_backend_data (abfd); | |
957 | collect = bed->collect; | |
958 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
959 | ||
d4c88bbb AM |
960 | shortlen = p - name; |
961 | shortname = bfd_hash_allocate (&info->hash->table, shortlen + 1); | |
215007a6 L |
962 | if (shortname == NULL) |
963 | return false; | |
d4c88bbb AM |
964 | memcpy (shortname, name, shortlen); |
965 | shortname[shortlen] = '\0'; | |
215007a6 L |
966 | |
967 | /* We are going to create a new symbol. Merge it with any existing | |
968 | symbol with this name. For the purposes of the merge, act as | |
969 | though we were defining the symbol we just defined, although we | |
970 | actually going to define an indirect symbol. */ | |
971 | type_change_ok = false; | |
972 | size_change_ok = false; | |
973 | if (! elf_merge_symbol (abfd, info, shortname, sym, sec, value, | |
974 | &hi, &override, &type_change_ok, | |
975 | &size_change_ok, dt_needed)) | |
976 | return false; | |
977 | ||
978 | if (! override) | |
979 | { | |
980 | if (! (_bfd_generic_link_add_one_symbol | |
981 | (info, abfd, shortname, BSF_INDIRECT, bfd_ind_section_ptr, | |
982 | (bfd_vma) 0, name, false, collect, | |
983 | (struct bfd_link_hash_entry **) &hi))) | |
984 | return false; | |
985 | } | |
986 | else | |
987 | { | |
988 | /* In this case the symbol named SHORTNAME is overriding the | |
989 | indirect symbol we want to add. We were planning on making | |
990 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
991 | is the name without a version. NAME is the fully versioned | |
992 | name, and it is the default version. | |
993 | ||
994 | Overriding means that we already saw a definition for the | |
995 | symbol SHORTNAME in a regular object, and it is overriding | |
996 | the symbol defined in the dynamic object. | |
997 | ||
998 | When this happens, we actually want to change NAME, the | |
999 | symbol we just added, to refer to SHORTNAME. This will cause | |
1000 | references to NAME in the shared object to become references | |
1001 | to SHORTNAME in the regular object. This is what we expect | |
1002 | when we override a function in a shared object: that the | |
1003 | references in the shared object will be mapped to the | |
1004 | definition in the regular object. */ | |
1005 | ||
1006 | while (hi->root.type == bfd_link_hash_indirect | |
1007 | || hi->root.type == bfd_link_hash_warning) | |
1008 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1009 | ||
1010 | h->root.type = bfd_link_hash_indirect; | |
1011 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
1012 | if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) | |
1013 | { | |
1014 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEF_DYNAMIC; | |
1015 | hi->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC; | |
1016 | if (hi->elf_link_hash_flags | |
1017 | & (ELF_LINK_HASH_REF_REGULAR | |
1018 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1019 | { | |
1020 | if (! _bfd_elf_link_record_dynamic_symbol (info, hi)) | |
1021 | return false; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | /* Now set HI to H, so that the following code will set the | |
c44233aa | 1026 | other fields correctly. */ |
215007a6 L |
1027 | hi = h; |
1028 | } | |
1029 | ||
1030 | /* If there is a duplicate definition somewhere, then HI may not | |
1031 | point to an indirect symbol. We will have reported an error to | |
1032 | the user in that case. */ | |
1033 | ||
1034 | if (hi->root.type == bfd_link_hash_indirect) | |
1035 | { | |
1036 | struct elf_link_hash_entry *ht; | |
1037 | ||
1038 | /* If the symbol became indirect, then we assume that we have | |
1039 | not seen a definition before. */ | |
1040 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1041 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1042 | | ELF_LINK_HASH_DEF_REGULAR)) == 0); | |
1043 | ||
1044 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1045 | (*bed->elf_backend_copy_indirect_symbol) (ht, hi); | |
1046 | ||
1047 | /* See if the new flags lead us to realize that the symbol must | |
1048 | be dynamic. */ | |
1049 | if (! *dynsym) | |
1050 | { | |
1051 | if (! dynamic) | |
1052 | { | |
1053 | if (info->shared | |
1054 | || ((hi->elf_link_hash_flags | |
1055 | & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
1056 | *dynsym = true; | |
1057 | } | |
1058 | else | |
1059 | { | |
1060 | if ((hi->elf_link_hash_flags | |
1061 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1062 | *dynsym = true; | |
1063 | } | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | /* We also need to define an indirection from the nondefault version | |
1068 | of the symbol. */ | |
1069 | ||
d4c88bbb AM |
1070 | len = strlen (name); |
1071 | shortname = bfd_hash_allocate (&info->hash->table, len); | |
215007a6 L |
1072 | if (shortname == NULL) |
1073 | return false; | |
d4c88bbb AM |
1074 | memcpy (shortname, name, shortlen); |
1075 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
215007a6 L |
1076 | |
1077 | /* Once again, merge with any existing symbol. */ | |
1078 | type_change_ok = false; | |
1079 | size_change_ok = false; | |
1080 | if (! elf_merge_symbol (abfd, info, shortname, sym, sec, value, | |
1081 | &hi, &override, &type_change_ok, | |
1082 | &size_change_ok, dt_needed)) | |
1083 | return false; | |
1084 | ||
1085 | if (override) | |
1086 | { | |
1087 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
1088 | the type of override we do in the case above. */ | |
1089 | (*_bfd_error_handler) | |
1090 | (_("%s: warning: unexpected redefinition of `%s'"), | |
1091 | bfd_archive_filename (abfd), shortname); | |
1092 | } | |
1093 | else | |
1094 | { | |
1095 | if (! (_bfd_generic_link_add_one_symbol | |
1096 | (info, abfd, shortname, BSF_INDIRECT, | |
1097 | bfd_ind_section_ptr, (bfd_vma) 0, name, false, | |
1098 | collect, (struct bfd_link_hash_entry **) &hi))) | |
1099 | return false; | |
1100 | ||
1101 | /* If there is a duplicate definition somewhere, then HI may not | |
1102 | point to an indirect symbol. We will have reported an error | |
1103 | to the user in that case. */ | |
1104 | ||
1105 | if (hi->root.type == bfd_link_hash_indirect) | |
1106 | { | |
1107 | /* If the symbol became indirect, then we assume that we have | |
1108 | not seen a definition before. */ | |
1109 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1110 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1111 | | ELF_LINK_HASH_DEF_REGULAR)) == 0); | |
1112 | ||
c44233aa | 1113 | (*bed->elf_backend_copy_indirect_symbol) (h, hi); |
215007a6 L |
1114 | |
1115 | /* See if the new flags lead us to realize that the symbol | |
1116 | must be dynamic. */ | |
1117 | if (! *dynsym) | |
1118 | { | |
1119 | if (! dynamic) | |
1120 | { | |
1121 | if (info->shared | |
1122 | || ((hi->elf_link_hash_flags | |
1123 | & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
1124 | *dynsym = true; | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | if ((hi->elf_link_hash_flags | |
1129 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1130 | *dynsym = true; | |
1131 | } | |
1132 | } | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | return true; | |
1137 | } | |
1138 | ||
252b5132 RH |
1139 | /* Add symbols from an ELF object file to the linker hash table. */ |
1140 | ||
1141 | static boolean | |
1142 | elf_link_add_object_symbols (abfd, info) | |
1143 | bfd *abfd; | |
1144 | struct bfd_link_info *info; | |
1145 | { | |
1146 | boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *, | |
1147 | const Elf_Internal_Sym *, | |
1148 | const char **, flagword *, | |
1149 | asection **, bfd_vma *)); | |
1150 | boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *, | |
1151 | asection *, const Elf_Internal_Rela *)); | |
1152 | boolean collect; | |
1153 | Elf_Internal_Shdr *hdr; | |
dc810e39 AM |
1154 | bfd_size_type symcount; |
1155 | bfd_size_type extsymcount; | |
1156 | bfd_size_type extsymoff; | |
252b5132 RH |
1157 | struct elf_link_hash_entry **sym_hash; |
1158 | boolean dynamic; | |
252b5132 RH |
1159 | Elf_External_Versym *extversym = NULL; |
1160 | Elf_External_Versym *ever; | |
252b5132 | 1161 | struct elf_link_hash_entry *weaks; |
6cdc0ccc AM |
1162 | Elf_Internal_Sym *isymbuf = NULL; |
1163 | Elf_Internal_Sym *isym; | |
1164 | Elf_Internal_Sym *isymend; | |
c61b8717 | 1165 | struct elf_backend_data *bed; |
74816898 | 1166 | boolean dt_needed; |
8ea2e4bd | 1167 | struct elf_link_hash_table * hash_table; |
dc810e39 | 1168 | bfd_size_type amt; |
8ea2e4bd NC |
1169 | |
1170 | hash_table = elf_hash_table (info); | |
252b5132 | 1171 | |
c61b8717 RH |
1172 | bed = get_elf_backend_data (abfd); |
1173 | add_symbol_hook = bed->elf_add_symbol_hook; | |
1174 | collect = bed->collect; | |
252b5132 RH |
1175 | |
1176 | if ((abfd->flags & DYNAMIC) == 0) | |
1177 | dynamic = false; | |
1178 | else | |
1179 | { | |
1180 | dynamic = true; | |
1181 | ||
1182 | /* You can't use -r against a dynamic object. Also, there's no | |
1183 | hope of using a dynamic object which does not exactly match | |
1184 | the format of the output file. */ | |
1185 | if (info->relocateable || info->hash->creator != abfd->xvec) | |
1186 | { | |
1187 | bfd_set_error (bfd_error_invalid_operation); | |
1188 | goto error_return; | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | /* As a GNU extension, any input sections which are named | |
1193 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
1194 | symbol. This differs from .gnu.warning sections, which generate | |
1195 | warnings when they are included in an output file. */ | |
1196 | if (! info->shared) | |
1197 | { | |
1198 | asection *s; | |
1199 | ||
1200 | for (s = abfd->sections; s != NULL; s = s->next) | |
1201 | { | |
1202 | const char *name; | |
1203 | ||
1204 | name = bfd_get_section_name (abfd, s); | |
1205 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
1206 | { | |
1207 | char *msg; | |
1208 | bfd_size_type sz; | |
1209 | ||
1210 | name += sizeof ".gnu.warning." - 1; | |
1211 | ||
1212 | /* If this is a shared object, then look up the symbol | |
1213 | in the hash table. If it is there, and it is already | |
1214 | been defined, then we will not be using the entry | |
1215 | from this shared object, so we don't need to warn. | |
1216 | FIXME: If we see the definition in a regular object | |
1217 | later on, we will warn, but we shouldn't. The only | |
1218 | fix is to keep track of what warnings we are supposed | |
1219 | to emit, and then handle them all at the end of the | |
1220 | link. */ | |
1221 | if (dynamic && abfd->xvec == info->hash->creator) | |
1222 | { | |
1223 | struct elf_link_hash_entry *h; | |
1224 | ||
8ea2e4bd | 1225 | h = elf_link_hash_lookup (hash_table, name, |
252b5132 RH |
1226 | false, false, true); |
1227 | ||
1228 | /* FIXME: What about bfd_link_hash_common? */ | |
1229 | if (h != NULL | |
1230 | && (h->root.type == bfd_link_hash_defined | |
1231 | || h->root.type == bfd_link_hash_defweak)) | |
1232 | { | |
1233 | /* We don't want to issue this warning. Clobber | |
c44233aa AM |
1234 | the section size so that the warning does not |
1235 | get copied into the output file. */ | |
252b5132 RH |
1236 | s->_raw_size = 0; |
1237 | continue; | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | sz = bfd_section_size (abfd, s); | |
1242 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
1243 | if (msg == NULL) | |
1244 | goto error_return; | |
1245 | ||
1246 | if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz)) | |
1247 | goto error_return; | |
1248 | ||
1249 | msg[sz] = '\0'; | |
1250 | ||
1251 | if (! (_bfd_generic_link_add_one_symbol | |
1252 | (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg, | |
1253 | false, collect, (struct bfd_link_hash_entry **) NULL))) | |
1254 | goto error_return; | |
1255 | ||
1256 | if (! info->relocateable) | |
1257 | { | |
1258 | /* Clobber the section size so that the warning does | |
c44233aa | 1259 | not get copied into the output file. */ |
252b5132 RH |
1260 | s->_raw_size = 0; |
1261 | } | |
1262 | } | |
1263 | } | |
1264 | } | |
1265 | ||
74816898 | 1266 | dt_needed = false; |
252b5132 RH |
1267 | if (! dynamic) |
1268 | { | |
1269 | /* If we are creating a shared library, create all the dynamic | |
c44233aa AM |
1270 | sections immediately. We need to attach them to something, |
1271 | so we attach them to this BFD, provided it is the right | |
1272 | format. FIXME: If there are no input BFD's of the same | |
1273 | format as the output, we can't make a shared library. */ | |
252b5132 | 1274 | if (info->shared |
8ea2e4bd NC |
1275 | && is_elf_hash_table (info) |
1276 | && ! hash_table->dynamic_sections_created | |
252b5132 RH |
1277 | && abfd->xvec == info->hash->creator) |
1278 | { | |
1279 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1280 | goto error_return; | |
1281 | } | |
1282 | } | |
8ea2e4bd NC |
1283 | else if (! is_elf_hash_table (info)) |
1284 | goto error_return; | |
252b5132 RH |
1285 | else |
1286 | { | |
1287 | asection *s; | |
1288 | boolean add_needed; | |
1289 | const char *name; | |
1290 | bfd_size_type oldsize; | |
1291 | bfd_size_type strindex; | |
1292 | ||
1293 | /* Find the name to use in a DT_NEEDED entry that refers to this | |
1294 | object. If the object has a DT_SONAME entry, we use it. | |
1295 | Otherwise, if the generic linker stuck something in | |
1296 | elf_dt_name, we use that. Otherwise, we just use the file | |
1297 | name. If the generic linker put a null string into | |
1298 | elf_dt_name, we don't make a DT_NEEDED entry at all, even if | |
1299 | there is a DT_SONAME entry. */ | |
1300 | add_needed = true; | |
7913c838 | 1301 | name = bfd_get_filename (abfd); |
252b5132 RH |
1302 | if (elf_dt_name (abfd) != NULL) |
1303 | { | |
1304 | name = elf_dt_name (abfd); | |
1305 | if (*name == '\0') | |
74816898 L |
1306 | { |
1307 | if (elf_dt_soname (abfd) != NULL) | |
c44233aa | 1308 | dt_needed = true; |
74816898 L |
1309 | |
1310 | add_needed = false; | |
1311 | } | |
252b5132 RH |
1312 | } |
1313 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
1314 | if (s != NULL) | |
1315 | { | |
6cdc0ccc | 1316 | Elf_External_Dyn *dynbuf = NULL; |
252b5132 RH |
1317 | Elf_External_Dyn *extdyn; |
1318 | Elf_External_Dyn *extdynend; | |
1319 | int elfsec; | |
dc810e39 | 1320 | unsigned long shlink; |
a963dc6a L |
1321 | int rpath; |
1322 | int runpath; | |
252b5132 | 1323 | |
dc810e39 | 1324 | dynbuf = (Elf_External_Dyn *) bfd_malloc (s->_raw_size); |
252b5132 RH |
1325 | if (dynbuf == NULL) |
1326 | goto error_return; | |
1327 | ||
1328 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
1329 | (file_ptr) 0, s->_raw_size)) | |
6cdc0ccc | 1330 | goto error_free_dyn; |
252b5132 RH |
1331 | |
1332 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
1333 | if (elfsec == -1) | |
6cdc0ccc | 1334 | goto error_free_dyn; |
dc810e39 | 1335 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; |
252b5132 RH |
1336 | |
1337 | extdyn = dynbuf; | |
1338 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
a963dc6a L |
1339 | rpath = 0; |
1340 | runpath = 0; | |
252b5132 RH |
1341 | for (; extdyn < extdynend; extdyn++) |
1342 | { | |
1343 | Elf_Internal_Dyn dyn; | |
1344 | ||
1345 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
1346 | if (dyn.d_tag == DT_SONAME) | |
1347 | { | |
dc810e39 AM |
1348 | unsigned int tagv = dyn.d_un.d_val; |
1349 | name = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1350 | if (name == NULL) |
6cdc0ccc | 1351 | goto error_free_dyn; |
252b5132 RH |
1352 | } |
1353 | if (dyn.d_tag == DT_NEEDED) | |
1354 | { | |
1355 | struct bfd_link_needed_list *n, **pn; | |
1356 | char *fnm, *anm; | |
dc810e39 | 1357 | unsigned int tagv = dyn.d_un.d_val; |
252b5132 | 1358 | |
dc810e39 AM |
1359 | amt = sizeof (struct bfd_link_needed_list); |
1360 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1361 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1362 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1363 | goto error_free_dyn; |
d4c88bbb AM |
1364 | amt = strlen (fnm) + 1; |
1365 | anm = bfd_alloc (abfd, amt); | |
252b5132 | 1366 | if (anm == NULL) |
6cdc0ccc | 1367 | goto error_free_dyn; |
d4c88bbb | 1368 | memcpy (anm, fnm, (size_t) amt); |
252b5132 RH |
1369 | n->name = anm; |
1370 | n->by = abfd; | |
1371 | n->next = NULL; | |
8ea2e4bd | 1372 | for (pn = & hash_table->needed; |
252b5132 RH |
1373 | *pn != NULL; |
1374 | pn = &(*pn)->next) | |
1375 | ; | |
1376 | *pn = n; | |
1377 | } | |
a963dc6a L |
1378 | if (dyn.d_tag == DT_RUNPATH) |
1379 | { | |
1380 | struct bfd_link_needed_list *n, **pn; | |
1381 | char *fnm, *anm; | |
dc810e39 | 1382 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a L |
1383 | |
1384 | /* When we see DT_RPATH before DT_RUNPATH, we have | |
512a2384 AM |
1385 | to clear runpath. Do _NOT_ bfd_release, as that |
1386 | frees all more recently bfd_alloc'd blocks as | |
1387 | well. */ | |
8ea2e4bd NC |
1388 | if (rpath && hash_table->runpath) |
1389 | hash_table->runpath = NULL; | |
a963dc6a | 1390 | |
dc810e39 AM |
1391 | amt = sizeof (struct bfd_link_needed_list); |
1392 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1393 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1394 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1395 | goto error_free_dyn; |
d4c88bbb AM |
1396 | amt = strlen (fnm) + 1; |
1397 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1398 | if (anm == NULL) |
6cdc0ccc | 1399 | goto error_free_dyn; |
d4c88bbb | 1400 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1401 | n->name = anm; |
1402 | n->by = abfd; | |
1403 | n->next = NULL; | |
8ea2e4bd | 1404 | for (pn = & hash_table->runpath; |
a963dc6a L |
1405 | *pn != NULL; |
1406 | pn = &(*pn)->next) | |
1407 | ; | |
1408 | *pn = n; | |
1409 | runpath = 1; | |
1410 | rpath = 0; | |
1411 | } | |
3e932841 | 1412 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ |
a963dc6a | 1413 | if (!runpath && dyn.d_tag == DT_RPATH) |
c44233aa | 1414 | { |
a963dc6a L |
1415 | struct bfd_link_needed_list *n, **pn; |
1416 | char *fnm, *anm; | |
dc810e39 | 1417 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a | 1418 | |
dc810e39 AM |
1419 | amt = sizeof (struct bfd_link_needed_list); |
1420 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1421 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1422 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1423 | goto error_free_dyn; |
d4c88bbb AM |
1424 | amt = strlen (fnm) + 1; |
1425 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1426 | if (anm == NULL) |
6cdc0ccc AM |
1427 | { |
1428 | error_free_dyn: | |
1429 | free (dynbuf); | |
1430 | goto error_return; | |
1431 | } | |
d4c88bbb | 1432 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1433 | n->name = anm; |
1434 | n->by = abfd; | |
1435 | n->next = NULL; | |
8ea2e4bd | 1436 | for (pn = & hash_table->runpath; |
a963dc6a L |
1437 | *pn != NULL; |
1438 | pn = &(*pn)->next) | |
1439 | ; | |
1440 | *pn = n; | |
1441 | rpath = 1; | |
1442 | } | |
252b5132 RH |
1443 | } |
1444 | ||
1445 | free (dynbuf); | |
252b5132 RH |
1446 | } |
1447 | ||
1448 | /* We do not want to include any of the sections in a dynamic | |
1449 | object in the output file. We hack by simply clobbering the | |
1450 | list of sections in the BFD. This could be handled more | |
1451 | cleanly by, say, a new section flag; the existing | |
1452 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
1453 | still implies that the section takes up space in the output | |
1454 | file. */ | |
c601ffdb | 1455 | bfd_section_list_clear (abfd); |
252b5132 RH |
1456 | |
1457 | /* If this is the first dynamic object found in the link, create | |
1458 | the special sections required for dynamic linking. */ | |
8ea2e4bd NC |
1459 | if (! hash_table->dynamic_sections_created) |
1460 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1461 | goto error_return; | |
252b5132 RH |
1462 | |
1463 | if (add_needed) | |
1464 | { | |
1465 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
2b0f7ef9 JJ |
1466 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
1467 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, name, false); | |
252b5132 RH |
1468 | if (strindex == (bfd_size_type) -1) |
1469 | goto error_return; | |
1470 | ||
2b0f7ef9 | 1471 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
252b5132 RH |
1472 | { |
1473 | asection *sdyn; | |
1474 | Elf_External_Dyn *dyncon, *dynconend; | |
1475 | ||
1476 | /* The hash table size did not change, which means that | |
1477 | the dynamic object name was already entered. If we | |
1478 | have already included this dynamic object in the | |
1479 | link, just ignore it. There is no reason to include | |
1480 | a particular dynamic object more than once. */ | |
8ea2e4bd | 1481 | sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic"); |
252b5132 RH |
1482 | BFD_ASSERT (sdyn != NULL); |
1483 | ||
1484 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
1485 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
1486 | sdyn->_raw_size); | |
1487 | for (; dyncon < dynconend; dyncon++) | |
1488 | { | |
1489 | Elf_Internal_Dyn dyn; | |
1490 | ||
8ea2e4bd | 1491 | elf_swap_dyn_in (hash_table->dynobj, dyncon, & dyn); |
252b5132 RH |
1492 | if (dyn.d_tag == DT_NEEDED |
1493 | && dyn.d_un.d_val == strindex) | |
1494 | { | |
2b0f7ef9 | 1495 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); |
252b5132 RH |
1496 | return true; |
1497 | } | |
1498 | } | |
1499 | } | |
1500 | ||
dc810e39 | 1501 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
252b5132 RH |
1502 | goto error_return; |
1503 | } | |
1504 | ||
1505 | /* Save the SONAME, if there is one, because sometimes the | |
c44233aa | 1506 | linker emulation code will need to know it. */ |
252b5132 | 1507 | if (*name == '\0') |
210ba1e8 | 1508 | name = basename (bfd_get_filename (abfd)); |
252b5132 RH |
1509 | elf_dt_name (abfd) = name; |
1510 | } | |
1511 | ||
6cdc0ccc AM |
1512 | /* If this is a dynamic object, we always link against the .dynsym |
1513 | symbol table, not the .symtab symbol table. The dynamic linker | |
1514 | will only see the .dynsym symbol table, so there is no reason to | |
1515 | look at .symtab for a dynamic object. */ | |
1516 | ||
1517 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
1518 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1519 | else | |
1520 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1521 | ||
1522 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
1523 | ||
1524 | /* The sh_info field of the symtab header tells us where the | |
1525 | external symbols start. We don't care about the local symbols at | |
1526 | this point. */ | |
1527 | if (elf_bad_symtab (abfd)) | |
1528 | { | |
1529 | extsymcount = symcount; | |
1530 | extsymoff = 0; | |
1531 | } | |
1532 | else | |
1533 | { | |
1534 | extsymcount = symcount - hdr->sh_info; | |
1535 | extsymoff = hdr->sh_info; | |
1536 | } | |
252b5132 | 1537 | |
6cdc0ccc AM |
1538 | sym_hash = NULL; |
1539 | if (extsymcount != 0) | |
9ad5cbcf | 1540 | { |
6cdc0ccc AM |
1541 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, |
1542 | NULL, NULL, NULL); | |
1543 | if (isymbuf == NULL) | |
9ad5cbcf | 1544 | goto error_return; |
6cdc0ccc AM |
1545 | |
1546 | /* We store a pointer to the hash table entry for each external | |
1547 | symbol. */ | |
1548 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
1549 | sym_hash = (struct elf_link_hash_entry **) bfd_alloc (abfd, amt); | |
1550 | if (sym_hash == NULL) | |
1551 | goto error_free_sym; | |
1552 | elf_sym_hashes (abfd) = sym_hash; | |
1553 | } | |
1554 | ||
1555 | if (dynamic) | |
1556 | { | |
1557 | /* Read in any version definitions. */ | |
1558 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
1559 | goto error_free_sym; | |
1560 | ||
1561 | /* Read in the symbol versions, but don't bother to convert them | |
1562 | to internal format. */ | |
1563 | if (elf_dynversym (abfd) != 0) | |
1564 | { | |
1565 | Elf_Internal_Shdr *versymhdr; | |
1566 | ||
1567 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1568 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
1569 | if (extversym == NULL) | |
1570 | goto error_free_sym; | |
1571 | amt = versymhdr->sh_size; | |
1572 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
1573 | || bfd_bread ((PTR) extversym, amt, abfd) != amt) | |
1574 | goto error_free_vers; | |
1575 | } | |
9ad5cbcf AM |
1576 | } |
1577 | ||
252b5132 RH |
1578 | weaks = NULL; |
1579 | ||
1580 | ever = extversym != NULL ? extversym + extsymoff : NULL; | |
6cdc0ccc AM |
1581 | for (isym = isymbuf, isymend = isymbuf + extsymcount; |
1582 | isym < isymend; | |
1583 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
252b5132 | 1584 | { |
252b5132 RH |
1585 | int bind; |
1586 | bfd_vma value; | |
1587 | asection *sec; | |
1588 | flagword flags; | |
1589 | const char *name; | |
1590 | struct elf_link_hash_entry *h; | |
1591 | boolean definition; | |
1592 | boolean size_change_ok, type_change_ok; | |
1593 | boolean new_weakdef; | |
1594 | unsigned int old_alignment; | |
215007a6 L |
1595 | boolean override; |
1596 | ||
1597 | override = false; | |
252b5132 | 1598 | |
252b5132 RH |
1599 | flags = BSF_NO_FLAGS; |
1600 | sec = NULL; | |
6cdc0ccc | 1601 | value = isym->st_value; |
252b5132 RH |
1602 | *sym_hash = NULL; |
1603 | ||
6cdc0ccc | 1604 | bind = ELF_ST_BIND (isym->st_info); |
252b5132 RH |
1605 | if (bind == STB_LOCAL) |
1606 | { | |
1607 | /* This should be impossible, since ELF requires that all | |
1608 | global symbols follow all local symbols, and that sh_info | |
1609 | point to the first global symbol. Unfortunatealy, Irix 5 | |
1610 | screws this up. */ | |
1611 | continue; | |
1612 | } | |
1613 | else if (bind == STB_GLOBAL) | |
1614 | { | |
6cdc0ccc AM |
1615 | if (isym->st_shndx != SHN_UNDEF |
1616 | && isym->st_shndx != SHN_COMMON) | |
252b5132 | 1617 | flags = BSF_GLOBAL; |
252b5132 RH |
1618 | } |
1619 | else if (bind == STB_WEAK) | |
1620 | flags = BSF_WEAK; | |
1621 | else | |
1622 | { | |
1623 | /* Leave it up to the processor backend. */ | |
1624 | } | |
1625 | ||
6cdc0ccc | 1626 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 1627 | sec = bfd_und_section_ptr; |
6cdc0ccc | 1628 | else if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 | 1629 | { |
6cdc0ccc | 1630 | sec = section_from_elf_index (abfd, isym->st_shndx); |
252b5132 RH |
1631 | if (sec == NULL) |
1632 | sec = bfd_abs_section_ptr; | |
1633 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1634 | value -= sec->vma; | |
1635 | } | |
6cdc0ccc | 1636 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 1637 | sec = bfd_abs_section_ptr; |
6cdc0ccc | 1638 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1639 | { |
1640 | sec = bfd_com_section_ptr; | |
1641 | /* What ELF calls the size we call the value. What ELF | |
1642 | calls the value we call the alignment. */ | |
6cdc0ccc | 1643 | value = isym->st_size; |
252b5132 RH |
1644 | } |
1645 | else | |
1646 | { | |
1647 | /* Leave it up to the processor backend. */ | |
1648 | } | |
1649 | ||
6cdc0ccc AM |
1650 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
1651 | isym->st_name); | |
252b5132 | 1652 | if (name == (const char *) NULL) |
6cdc0ccc | 1653 | goto error_free_vers; |
252b5132 | 1654 | |
6cdc0ccc AM |
1655 | if (isym->st_shndx == SHN_COMMON |
1656 | && ELF_ST_TYPE (isym->st_info) == STT_TLS) | |
13ae64f3 JJ |
1657 | { |
1658 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
1659 | ||
1660 | if (tcomm == NULL) | |
1661 | { | |
1662 | tcomm = bfd_make_section (abfd, ".tcommon"); | |
1663 | if (tcomm == NULL | |
1664 | || !bfd_set_section_flags (abfd, tcomm, (SEC_ALLOC | |
1665 | | SEC_IS_COMMON | |
1666 | | SEC_LINKER_CREATED | |
1667 | | SEC_THREAD_LOCAL))) | |
6cdc0ccc | 1668 | goto error_free_vers; |
13ae64f3 JJ |
1669 | } |
1670 | sec = tcomm; | |
1671 | } | |
1672 | else if (add_symbol_hook) | |
252b5132 | 1673 | { |
6cdc0ccc | 1674 | if (! (*add_symbol_hook) (abfd, info, isym, &name, &flags, &sec, |
252b5132 | 1675 | &value)) |
6cdc0ccc | 1676 | goto error_free_vers; |
252b5132 RH |
1677 | |
1678 | /* The hook function sets the name to NULL if this symbol | |
1679 | should be skipped for some reason. */ | |
1680 | if (name == (const char *) NULL) | |
1681 | continue; | |
1682 | } | |
1683 | ||
1684 | /* Sanity check that all possibilities were handled. */ | |
1685 | if (sec == (asection *) NULL) | |
1686 | { | |
1687 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1688 | goto error_free_vers; |
252b5132 RH |
1689 | } |
1690 | ||
1691 | if (bfd_is_und_section (sec) | |
1692 | || bfd_is_com_section (sec)) | |
1693 | definition = false; | |
1694 | else | |
1695 | definition = true; | |
1696 | ||
1697 | size_change_ok = false; | |
1698 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; | |
1699 | old_alignment = 0; | |
1700 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1701 | { | |
1702 | Elf_Internal_Versym iver; | |
1703 | unsigned int vernum = 0; | |
252b5132 RH |
1704 | |
1705 | if (ever != NULL) | |
1706 | { | |
1707 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
1708 | vernum = iver.vs_vers & VERSYM_VERSION; | |
1709 | ||
1710 | /* If this is a hidden symbol, or if it is not version | |
c44233aa AM |
1711 | 1, we append the version name to the symbol name. |
1712 | However, we do not modify a non-hidden absolute | |
1713 | symbol, because it might be the version symbol | |
1714 | itself. FIXME: What if it isn't? */ | |
252b5132 RH |
1715 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
1716 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
1717 | { | |
1718 | const char *verstr; | |
d4c88bbb | 1719 | size_t namelen, verlen, newlen; |
252b5132 RH |
1720 | char *newname, *p; |
1721 | ||
6cdc0ccc | 1722 | if (isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1723 | { |
1724 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) | |
1725 | { | |
1726 | (*_bfd_error_handler) | |
1727 | (_("%s: %s: invalid version %u (max %d)"), | |
8f615d07 | 1728 | bfd_archive_filename (abfd), name, vernum, |
252b5132 RH |
1729 | elf_tdata (abfd)->dynverdef_hdr.sh_info); |
1730 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1731 | goto error_free_vers; |
252b5132 RH |
1732 | } |
1733 | else if (vernum > 1) | |
1734 | verstr = | |
1735 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
1736 | else | |
1737 | verstr = ""; | |
1738 | } | |
1739 | else | |
1740 | { | |
1741 | /* We cannot simply test for the number of | |
1742 | entries in the VERNEED section since the | |
1743 | numbers for the needed versions do not start | |
1744 | at 0. */ | |
1745 | Elf_Internal_Verneed *t; | |
1746 | ||
1747 | verstr = NULL; | |
1748 | for (t = elf_tdata (abfd)->verref; | |
1749 | t != NULL; | |
1750 | t = t->vn_nextref) | |
1751 | { | |
1752 | Elf_Internal_Vernaux *a; | |
1753 | ||
1754 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1755 | { | |
1756 | if (a->vna_other == vernum) | |
1757 | { | |
1758 | verstr = a->vna_nodename; | |
1759 | break; | |
1760 | } | |
1761 | } | |
1762 | if (a != NULL) | |
1763 | break; | |
1764 | } | |
1765 | if (verstr == NULL) | |
1766 | { | |
1767 | (*_bfd_error_handler) | |
1768 | (_("%s: %s: invalid needed version %d"), | |
8f615d07 | 1769 | bfd_archive_filename (abfd), name, vernum); |
252b5132 | 1770 | bfd_set_error (bfd_error_bad_value); |
6cdc0ccc | 1771 | goto error_free_vers; |
252b5132 RH |
1772 | } |
1773 | } | |
1774 | ||
1775 | namelen = strlen (name); | |
d4c88bbb AM |
1776 | verlen = strlen (verstr); |
1777 | newlen = namelen + verlen + 2; | |
1778 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1779 | && isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1780 | ++newlen; |
1781 | ||
d4c88bbb | 1782 | newname = (char *) bfd_alloc (abfd, (bfd_size_type) newlen); |
252b5132 | 1783 | if (newname == NULL) |
6cdc0ccc | 1784 | goto error_free_vers; |
d4c88bbb | 1785 | memcpy (newname, name, namelen); |
252b5132 RH |
1786 | p = newname + namelen; |
1787 | *p++ = ELF_VER_CHR; | |
1287d1cc ILT |
1788 | /* If this is a defined non-hidden version symbol, |
1789 | we add another @ to the name. This indicates the | |
1790 | default version of the symbol. */ | |
1791 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1792 | && isym->st_shndx != SHN_UNDEF) |
252b5132 | 1793 | *p++ = ELF_VER_CHR; |
d4c88bbb | 1794 | memcpy (p, verstr, verlen + 1); |
252b5132 RH |
1795 | |
1796 | name = newname; | |
1797 | } | |
1798 | } | |
1799 | ||
6cdc0ccc | 1800 | if (! elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
252b5132 | 1801 | sym_hash, &override, &type_change_ok, |
456981d7 | 1802 | &size_change_ok, dt_needed)) |
6cdc0ccc | 1803 | goto error_free_vers; |
252b5132 RH |
1804 | |
1805 | if (override) | |
1806 | definition = false; | |
1807 | ||
1808 | h = *sym_hash; | |
1809 | while (h->root.type == bfd_link_hash_indirect | |
1810 | || h->root.type == bfd_link_hash_warning) | |
1811 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1812 | ||
1813 | /* Remember the old alignment if this is a common symbol, so | |
c44233aa AM |
1814 | that we don't reduce the alignment later on. We can't |
1815 | check later, because _bfd_generic_link_add_one_symbol | |
1816 | will set a default for the alignment which we want to | |
1817 | override. */ | |
252b5132 RH |
1818 | if (h->root.type == bfd_link_hash_common) |
1819 | old_alignment = h->root.u.c.p->alignment_power; | |
1820 | ||
1821 | if (elf_tdata (abfd)->verdef != NULL | |
1822 | && ! override | |
1823 | && vernum > 1 | |
1824 | && definition) | |
1825 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
1826 | } | |
1827 | ||
1828 | if (! (_bfd_generic_link_add_one_symbol | |
1829 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
1830 | false, collect, (struct bfd_link_hash_entry **) sym_hash))) | |
6cdc0ccc | 1831 | goto error_free_vers; |
252b5132 RH |
1832 | |
1833 | h = *sym_hash; | |
1834 | while (h->root.type == bfd_link_hash_indirect | |
1835 | || h->root.type == bfd_link_hash_warning) | |
1836 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1837 | *sym_hash = h; | |
1838 | ||
1839 | new_weakdef = false; | |
1840 | if (dynamic | |
1841 | && definition | |
1842 | && (flags & BSF_WEAK) != 0 | |
6cdc0ccc | 1843 | && ELF_ST_TYPE (isym->st_info) != STT_FUNC |
252b5132 RH |
1844 | && info->hash->creator->flavour == bfd_target_elf_flavour |
1845 | && h->weakdef == NULL) | |
1846 | { | |
1847 | /* Keep a list of all weak defined non function symbols from | |
1848 | a dynamic object, using the weakdef field. Later in this | |
1849 | function we will set the weakdef field to the correct | |
1850 | value. We only put non-function symbols from dynamic | |
1851 | objects on this list, because that happens to be the only | |
1852 | time we need to know the normal symbol corresponding to a | |
1853 | weak symbol, and the information is time consuming to | |
1854 | figure out. If the weakdef field is not already NULL, | |
1855 | then this symbol was already defined by some previous | |
1856 | dynamic object, and we will be using that previous | |
1857 | definition anyhow. */ | |
1858 | ||
1859 | h->weakdef = weaks; | |
1860 | weaks = h; | |
1861 | new_weakdef = true; | |
1862 | } | |
1863 | ||
1864 | /* Set the alignment of a common symbol. */ | |
6cdc0ccc | 1865 | if (isym->st_shndx == SHN_COMMON |
252b5132 RH |
1866 | && h->root.type == bfd_link_hash_common) |
1867 | { | |
1868 | unsigned int align; | |
1869 | ||
6cdc0ccc | 1870 | align = bfd_log2 (isym->st_value); |
724982f6 NC |
1871 | if (align > old_alignment |
1872 | /* Permit an alignment power of zero if an alignment of one | |
1873 | is specified and no other alignments have been specified. */ | |
6cdc0ccc | 1874 | || (isym->st_value == 1 && old_alignment == 0)) |
252b5132 RH |
1875 | h->root.u.c.p->alignment_power = align; |
1876 | } | |
1877 | ||
1878 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1879 | { | |
1880 | int old_flags; | |
1881 | boolean dynsym; | |
1882 | int new_flag; | |
1883 | ||
1884 | /* Remember the symbol size and type. */ | |
6cdc0ccc | 1885 | if (isym->st_size != 0 |
252b5132 RH |
1886 | && (definition || h->size == 0)) |
1887 | { | |
6cdc0ccc | 1888 | if (h->size != 0 && h->size != isym->st_size && ! size_change_ok) |
252b5132 RH |
1889 | (*_bfd_error_handler) |
1890 | (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"), | |
6cdc0ccc AM |
1891 | name, (unsigned long) h->size, |
1892 | (unsigned long) isym->st_size, bfd_archive_filename (abfd)); | |
252b5132 | 1893 | |
6cdc0ccc | 1894 | h->size = isym->st_size; |
252b5132 RH |
1895 | } |
1896 | ||
1897 | /* If this is a common symbol, then we always want H->SIZE | |
c44233aa AM |
1898 | to be the size of the common symbol. The code just above |
1899 | won't fix the size if a common symbol becomes larger. We | |
1900 | don't warn about a size change here, because that is | |
1901 | covered by --warn-common. */ | |
252b5132 RH |
1902 | if (h->root.type == bfd_link_hash_common) |
1903 | h->size = h->root.u.c.size; | |
1904 | ||
6cdc0ccc | 1905 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE |
252b5132 RH |
1906 | && (definition || h->type == STT_NOTYPE)) |
1907 | { | |
1908 | if (h->type != STT_NOTYPE | |
6cdc0ccc | 1909 | && h->type != ELF_ST_TYPE (isym->st_info) |
252b5132 RH |
1910 | && ! type_change_ok) |
1911 | (*_bfd_error_handler) | |
1912 | (_("Warning: type of symbol `%s' changed from %d to %d in %s"), | |
6cdc0ccc | 1913 | name, h->type, ELF_ST_TYPE (isym->st_info), |
8f615d07 | 1914 | bfd_archive_filename (abfd)); |
252b5132 | 1915 | |
6cdc0ccc | 1916 | h->type = ELF_ST_TYPE (isym->st_info); |
252b5132 RH |
1917 | } |
1918 | ||
7a13edea NC |
1919 | /* If st_other has a processor-specific meaning, specific code |
1920 | might be needed here. */ | |
6cdc0ccc | 1921 | if (isym->st_other != 0) |
7a13edea NC |
1922 | { |
1923 | /* Combine visibilities, using the most constraining one. */ | |
1924 | unsigned char hvis = ELF_ST_VISIBILITY (h->other); | |
6cdc0ccc | 1925 | unsigned char symvis = ELF_ST_VISIBILITY (isym->st_other); |
3e932841 | 1926 | |
7a13edea | 1927 | if (symvis && (hvis > symvis || hvis == 0)) |
6cdc0ccc | 1928 | h->other = isym->st_other; |
3e932841 | 1929 | |
7a13edea | 1930 | /* If neither has visibility, use the st_other of the |
c44233aa AM |
1931 | definition. This is an arbitrary choice, since the |
1932 | other bits have no general meaning. */ | |
7a13edea NC |
1933 | if (!symvis && !hvis |
1934 | && (definition || h->other == 0)) | |
6cdc0ccc | 1935 | h->other = isym->st_other; |
7a13edea | 1936 | } |
252b5132 RH |
1937 | |
1938 | /* Set a flag in the hash table entry indicating the type of | |
1939 | reference or definition we just found. Keep a count of | |
1940 | the number of dynamic symbols we find. A dynamic symbol | |
1941 | is one which is referenced or defined by both a regular | |
1942 | object and a shared object. */ | |
1943 | old_flags = h->elf_link_hash_flags; | |
1944 | dynsym = false; | |
1945 | if (! dynamic) | |
1946 | { | |
1947 | if (! definition) | |
1948 | { | |
1949 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1950 | if (bind != STB_WEAK) | |
1951 | new_flag |= ELF_LINK_HASH_REF_REGULAR_NONWEAK; | |
1952 | } | |
1953 | else | |
1954 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
1955 | if (info->shared | |
1956 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1957 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
1958 | dynsym = true; | |
1959 | } | |
1960 | else | |
1961 | { | |
1962 | if (! definition) | |
1963 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1964 | else | |
1965 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
1966 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
1967 | | ELF_LINK_HASH_REF_REGULAR)) != 0 | |
1968 | || (h->weakdef != NULL | |
1969 | && ! new_weakdef | |
1970 | && h->weakdef->dynindx != -1)) | |
1971 | dynsym = true; | |
1972 | } | |
1973 | ||
1974 | h->elf_link_hash_flags |= new_flag; | |
1975 | ||
215007a6 L |
1976 | /* Check to see if we need to add an indirect symbol for |
1977 | the default name. */ | |
051b8577 | 1978 | if (definition || h->root.type == bfd_link_hash_common) |
6cdc0ccc | 1979 | if (! elf_add_default_symbol (abfd, info, h, name, isym, |
215007a6 L |
1980 | &sec, &value, &dynsym, |
1981 | override, dt_needed)) | |
6cdc0ccc | 1982 | goto error_free_vers; |
252b5132 RH |
1983 | |
1984 | if (dynsym && h->dynindx == -1) | |
1985 | { | |
1986 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
6cdc0ccc | 1987 | goto error_free_vers; |
252b5132 RH |
1988 | if (h->weakdef != NULL |
1989 | && ! new_weakdef | |
1990 | && h->weakdef->dynindx == -1) | |
1991 | { | |
a7b97311 | 1992 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) |
6cdc0ccc | 1993 | goto error_free_vers; |
252b5132 RH |
1994 | } |
1995 | } | |
38048eb9 | 1996 | else if (dynsym && h->dynindx != -1) |
0444bdd4 L |
1997 | /* If the symbol already has a dynamic index, but |
1998 | visibility says it should not be visible, turn it into | |
1999 | a local symbol. */ | |
2000 | switch (ELF_ST_VISIBILITY (h->other)) | |
2001 | { | |
2002 | case STV_INTERNAL: | |
3e932841 | 2003 | case STV_HIDDEN: |
e5094212 | 2004 | (*bed->elf_backend_hide_symbol) (info, h, true); |
0444bdd4 L |
2005 | break; |
2006 | } | |
74816898 L |
2007 | |
2008 | if (dt_needed && definition | |
2009 | && (h->elf_link_hash_flags | |
2010 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
2011 | { | |
2012 | bfd_size_type oldsize; | |
2013 | bfd_size_type strindex; | |
2014 | ||
8ea2e4bd | 2015 | if (! is_elf_hash_table (info)) |
6cdc0ccc | 2016 | goto error_free_vers; |
8ea2e4bd | 2017 | |
74816898 | 2018 | /* The symbol from a DT_NEEDED object is referenced from |
c44233aa | 2019 | the regular object to create a dynamic executable. We |
3e932841 | 2020 | have to make sure there is a DT_NEEDED entry for it. */ |
74816898 L |
2021 | |
2022 | dt_needed = false; | |
2b0f7ef9 JJ |
2023 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
2024 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, | |
2025 | elf_dt_soname (abfd), false); | |
74816898 | 2026 | if (strindex == (bfd_size_type) -1) |
6cdc0ccc | 2027 | goto error_free_vers; |
74816898 | 2028 | |
2b0f7ef9 | 2029 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
74816898 L |
2030 | { |
2031 | asection *sdyn; | |
2032 | Elf_External_Dyn *dyncon, *dynconend; | |
2033 | ||
8ea2e4bd | 2034 | sdyn = bfd_get_section_by_name (hash_table->dynobj, |
74816898 L |
2035 | ".dynamic"); |
2036 | BFD_ASSERT (sdyn != NULL); | |
2037 | ||
2038 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
2039 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
2040 | sdyn->_raw_size); | |
2041 | for (; dyncon < dynconend; dyncon++) | |
2042 | { | |
2043 | Elf_Internal_Dyn dyn; | |
2044 | ||
8ea2e4bd | 2045 | elf_swap_dyn_in (hash_table->dynobj, |
74816898 L |
2046 | dyncon, &dyn); |
2047 | BFD_ASSERT (dyn.d_tag != DT_NEEDED || | |
2048 | dyn.d_un.d_val != strindex); | |
2049 | } | |
2050 | } | |
2051 | ||
dc810e39 | 2052 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
6cdc0ccc | 2053 | goto error_free_vers; |
74816898 | 2054 | } |
252b5132 RH |
2055 | } |
2056 | } | |
2057 | ||
6cdc0ccc AM |
2058 | if (extversym != NULL) |
2059 | { | |
2060 | free (extversym); | |
2061 | extversym = NULL; | |
2062 | } | |
2063 | ||
2064 | if (isymbuf != NULL) | |
2065 | free (isymbuf); | |
2066 | isymbuf = NULL; | |
2067 | ||
252b5132 RH |
2068 | /* Now set the weakdefs field correctly for all the weak defined |
2069 | symbols we found. The only way to do this is to search all the | |
2070 | symbols. Since we only need the information for non functions in | |
2071 | dynamic objects, that's the only time we actually put anything on | |
2072 | the list WEAKS. We need this information so that if a regular | |
2073 | object refers to a symbol defined weakly in a dynamic object, the | |
2074 | real symbol in the dynamic object is also put in the dynamic | |
2075 | symbols; we also must arrange for both symbols to point to the | |
2076 | same memory location. We could handle the general case of symbol | |
2077 | aliasing, but a general symbol alias can only be generated in | |
2078 | assembler code, handling it correctly would be very time | |
2079 | consuming, and other ELF linkers don't handle general aliasing | |
2080 | either. */ | |
2081 | while (weaks != NULL) | |
2082 | { | |
2083 | struct elf_link_hash_entry *hlook; | |
2084 | asection *slook; | |
2085 | bfd_vma vlook; | |
2086 | struct elf_link_hash_entry **hpp; | |
2087 | struct elf_link_hash_entry **hppend; | |
2088 | ||
2089 | hlook = weaks; | |
2090 | weaks = hlook->weakdef; | |
2091 | hlook->weakdef = NULL; | |
2092 | ||
2093 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
2094 | || hlook->root.type == bfd_link_hash_defweak | |
2095 | || hlook->root.type == bfd_link_hash_common | |
2096 | || hlook->root.type == bfd_link_hash_indirect); | |
2097 | slook = hlook->root.u.def.section; | |
2098 | vlook = hlook->root.u.def.value; | |
2099 | ||
2100 | hpp = elf_sym_hashes (abfd); | |
2101 | hppend = hpp + extsymcount; | |
2102 | for (; hpp < hppend; hpp++) | |
2103 | { | |
2104 | struct elf_link_hash_entry *h; | |
2105 | ||
2106 | h = *hpp; | |
2107 | if (h != NULL && h != hlook | |
2108 | && h->root.type == bfd_link_hash_defined | |
2109 | && h->root.u.def.section == slook | |
2110 | && h->root.u.def.value == vlook) | |
2111 | { | |
2112 | hlook->weakdef = h; | |
2113 | ||
2114 | /* If the weak definition is in the list of dynamic | |
2115 | symbols, make sure the real definition is put there | |
2116 | as well. */ | |
2117 | if (hlook->dynindx != -1 | |
2118 | && h->dynindx == -1) | |
2119 | { | |
2120 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
2121 | goto error_return; | |
2122 | } | |
2123 | ||
2124 | /* If the real definition is in the list of dynamic | |
c44233aa AM |
2125 | symbols, make sure the weak definition is put there |
2126 | as well. If we don't do this, then the dynamic | |
2127 | loader might not merge the entries for the real | |
2128 | definition and the weak definition. */ | |
252b5132 RH |
2129 | if (h->dynindx != -1 |
2130 | && hlook->dynindx == -1) | |
2131 | { | |
2132 | if (! _bfd_elf_link_record_dynamic_symbol (info, hlook)) | |
2133 | goto error_return; | |
2134 | } | |
252b5132 RH |
2135 | break; |
2136 | } | |
2137 | } | |
2138 | } | |
2139 | ||
252b5132 RH |
2140 | /* If this object is the same format as the output object, and it is |
2141 | not a shared library, then let the backend look through the | |
2142 | relocs. | |
2143 | ||
2144 | This is required to build global offset table entries and to | |
2145 | arrange for dynamic relocs. It is not required for the | |
2146 | particular common case of linking non PIC code, even when linking | |
2147 | against shared libraries, but unfortunately there is no way of | |
2148 | knowing whether an object file has been compiled PIC or not. | |
2149 | Looking through the relocs is not particularly time consuming. | |
2150 | The problem is that we must either (1) keep the relocs in memory, | |
2151 | which causes the linker to require additional runtime memory or | |
2152 | (2) read the relocs twice from the input file, which wastes time. | |
2153 | This would be a good case for using mmap. | |
2154 | ||
2155 | I have no idea how to handle linking PIC code into a file of a | |
2156 | different format. It probably can't be done. */ | |
2157 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
2158 | if (! dynamic | |
2159 | && abfd->xvec == info->hash->creator | |
2160 | && check_relocs != NULL) | |
2161 | { | |
2162 | asection *o; | |
2163 | ||
2164 | for (o = abfd->sections; o != NULL; o = o->next) | |
2165 | { | |
2166 | Elf_Internal_Rela *internal_relocs; | |
2167 | boolean ok; | |
2168 | ||
2169 | if ((o->flags & SEC_RELOC) == 0 | |
2170 | || o->reloc_count == 0 | |
2171 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2172 | && (o->flags & SEC_DEBUGGING) != 0) | |
2173 | || bfd_is_abs_section (o->output_section)) | |
2174 | continue; | |
2175 | ||
2176 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
2177 | (abfd, o, (PTR) NULL, | |
2178 | (Elf_Internal_Rela *) NULL, | |
2179 | info->keep_memory)); | |
2180 | if (internal_relocs == NULL) | |
2181 | goto error_return; | |
2182 | ||
2183 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
2184 | ||
6cdc0ccc | 2185 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
2186 | free (internal_relocs); |
2187 | ||
2188 | if (! ok) | |
2189 | goto error_return; | |
2190 | } | |
2191 | } | |
2192 | ||
2193 | /* If this is a non-traditional, non-relocateable link, try to | |
2194 | optimize the handling of the .stab/.stabstr sections. */ | |
2195 | if (! dynamic | |
2196 | && ! info->relocateable | |
2197 | && ! info->traditional_format | |
2198 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
8ea2e4bd | 2199 | && is_elf_hash_table (info) |
252b5132 RH |
2200 | && (info->strip != strip_all && info->strip != strip_debugger)) |
2201 | { | |
2202 | asection *stab, *stabstr; | |
2203 | ||
2204 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
2d653fc7 AM |
2205 | if (stab != NULL |
2206 | && (stab->flags & SEC_MERGE) == 0 | |
2207 | && !bfd_is_abs_section (stab->output_section)) | |
252b5132 RH |
2208 | { |
2209 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
2210 | ||
2211 | if (stabstr != NULL) | |
2212 | { | |
2213 | struct bfd_elf_section_data *secdata; | |
2214 | ||
2215 | secdata = elf_section_data (stab); | |
2216 | if (! _bfd_link_section_stabs (abfd, | |
8ea2e4bd | 2217 | & hash_table->stab_info, |
252b5132 | 2218 | stab, stabstr, |
65765700 | 2219 | &secdata->sec_info)) |
252b5132 | 2220 | goto error_return; |
65765700 JJ |
2221 | if (secdata->sec_info) |
2222 | secdata->sec_info_type = ELF_INFO_TYPE_STABS; | |
252b5132 RH |
2223 | } |
2224 | } | |
2225 | } | |
2226 | ||
8ea2e4bd NC |
2227 | if (! info->relocateable && ! dynamic |
2228 | && is_elf_hash_table (info)) | |
f5fa8ca2 JJ |
2229 | { |
2230 | asection *s; | |
2231 | ||
2232 | for (s = abfd->sections; s != NULL; s = s->next) | |
2d653fc7 AM |
2233 | if ((s->flags & SEC_MERGE) != 0 |
2234 | && !bfd_is_abs_section (s->output_section)) | |
65765700 JJ |
2235 | { |
2236 | struct bfd_elf_section_data *secdata; | |
2237 | ||
2238 | secdata = elf_section_data (s); | |
2239 | if (! _bfd_merge_section (abfd, | |
2240 | & hash_table->merge_info, | |
2241 | s, &secdata->sec_info)) | |
2242 | goto error_return; | |
2243 | else if (secdata->sec_info) | |
2244 | secdata->sec_info_type = ELF_INFO_TYPE_MERGE; | |
2245 | } | |
f5fa8ca2 JJ |
2246 | } |
2247 | ||
f5d44ba0 AM |
2248 | if (is_elf_hash_table (info)) |
2249 | { | |
2250 | /* Add this bfd to the loaded list. */ | |
2251 | struct elf_link_loaded_list *n; | |
2252 | ||
2253 | n = ((struct elf_link_loaded_list *) | |
2254 | bfd_alloc (abfd, sizeof (struct elf_link_loaded_list))); | |
2255 | if (n == NULL) | |
2256 | goto error_return; | |
2257 | n->abfd = abfd; | |
2258 | n->next = hash_table->loaded; | |
2259 | hash_table->loaded = n; | |
2260 | } | |
2261 | ||
252b5132 RH |
2262 | return true; |
2263 | ||
6cdc0ccc | 2264 | error_free_vers: |
252b5132 RH |
2265 | if (extversym != NULL) |
2266 | free (extversym); | |
6cdc0ccc AM |
2267 | error_free_sym: |
2268 | if (isymbuf != NULL) | |
2269 | free (isymbuf); | |
2270 | error_return: | |
252b5132 RH |
2271 | return false; |
2272 | } | |
2273 | ||
2274 | /* Create some sections which will be filled in with dynamic linking | |
2275 | information. ABFD is an input file which requires dynamic sections | |
2276 | to be created. The dynamic sections take up virtual memory space | |
2277 | when the final executable is run, so we need to create them before | |
2278 | addresses are assigned to the output sections. We work out the | |
2279 | actual contents and size of these sections later. */ | |
2280 | ||
2281 | boolean | |
2282 | elf_link_create_dynamic_sections (abfd, info) | |
2283 | bfd *abfd; | |
2284 | struct bfd_link_info *info; | |
2285 | { | |
2286 | flagword flags; | |
2287 | register asection *s; | |
2288 | struct elf_link_hash_entry *h; | |
2289 | struct elf_backend_data *bed; | |
2290 | ||
8ea2e4bd NC |
2291 | if (! is_elf_hash_table (info)) |
2292 | return false; | |
2293 | ||
252b5132 RH |
2294 | if (elf_hash_table (info)->dynamic_sections_created) |
2295 | return true; | |
2296 | ||
2297 | /* Make sure that all dynamic sections use the same input BFD. */ | |
2298 | if (elf_hash_table (info)->dynobj == NULL) | |
2299 | elf_hash_table (info)->dynobj = abfd; | |
2300 | else | |
2301 | abfd = elf_hash_table (info)->dynobj; | |
2302 | ||
2303 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
2304 | sections. */ | |
2305 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
2306 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2307 | ||
2308 | /* A dynamically linked executable has a .interp section, but a | |
2309 | shared library does not. */ | |
2310 | if (! info->shared) | |
2311 | { | |
2312 | s = bfd_make_section (abfd, ".interp"); | |
2313 | if (s == NULL | |
2314 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
2315 | return false; | |
2316 | } | |
2317 | ||
65765700 JJ |
2318 | if (! info->traditional_format |
2319 | && info->hash->creator->flavour == bfd_target_elf_flavour) | |
2320 | { | |
2321 | s = bfd_make_section (abfd, ".eh_frame_hdr"); | |
2322 | if (s == NULL | |
2323 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2324 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
2325 | return false; | |
2326 | } | |
2327 | ||
252b5132 RH |
2328 | /* Create sections to hold version informations. These are removed |
2329 | if they are not needed. */ | |
2330 | s = bfd_make_section (abfd, ".gnu.version_d"); | |
2331 | if (s == NULL | |
2332 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2333 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
2334 | return false; | |
2335 | ||
2336 | s = bfd_make_section (abfd, ".gnu.version"); | |
2337 | if (s == NULL | |
2338 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2339 | || ! bfd_set_section_alignment (abfd, s, 1)) | |
2340 | return false; | |
2341 | ||
2342 | s = bfd_make_section (abfd, ".gnu.version_r"); | |
2343 | if (s == NULL | |
2344 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2345 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
2346 | return false; | |
2347 | ||
2348 | s = bfd_make_section (abfd, ".dynsym"); | |
2349 | if (s == NULL | |
2350 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2351 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
2352 | return false; | |
2353 | ||
2354 | s = bfd_make_section (abfd, ".dynstr"); | |
2355 | if (s == NULL | |
2356 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
2357 | return false; | |
2358 | ||
2359 | /* Create a strtab to hold the dynamic symbol names. */ | |
2360 | if (elf_hash_table (info)->dynstr == NULL) | |
2361 | { | |
2b0f7ef9 | 2362 | elf_hash_table (info)->dynstr = _bfd_elf_strtab_init (); |
252b5132 RH |
2363 | if (elf_hash_table (info)->dynstr == NULL) |
2364 | return false; | |
2365 | } | |
2366 | ||
2367 | s = bfd_make_section (abfd, ".dynamic"); | |
2368 | if (s == NULL | |
2369 | || ! bfd_set_section_flags (abfd, s, flags) | |
2370 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
2371 | return false; | |
2372 | ||
2373 | /* The special symbol _DYNAMIC is always set to the start of the | |
2374 | .dynamic section. This call occurs before we have processed the | |
2375 | symbols for any dynamic object, so we don't have to worry about | |
2376 | overriding a dynamic definition. We could set _DYNAMIC in a | |
2377 | linker script, but we only want to define it if we are, in fact, | |
2378 | creating a .dynamic section. We don't want to define it if there | |
2379 | is no .dynamic section, since on some ELF platforms the start up | |
2380 | code examines it to decide how to initialize the process. */ | |
2381 | h = NULL; | |
2382 | if (! (_bfd_generic_link_add_one_symbol | |
2383 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
2384 | (const char *) NULL, false, get_elf_backend_data (abfd)->collect, | |
2385 | (struct bfd_link_hash_entry **) &h))) | |
2386 | return false; | |
2387 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2388 | h->type = STT_OBJECT; | |
2389 | ||
2390 | if (info->shared | |
2391 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
2392 | return false; | |
2393 | ||
c7ac6ff8 MM |
2394 | bed = get_elf_backend_data (abfd); |
2395 | ||
252b5132 RH |
2396 | s = bfd_make_section (abfd, ".hash"); |
2397 | if (s == NULL | |
2398 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2399 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
2400 | return false; | |
c7ac6ff8 | 2401 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; |
252b5132 RH |
2402 | |
2403 | /* Let the backend create the rest of the sections. This lets the | |
2404 | backend set the right flags. The backend will normally create | |
2405 | the .got and .plt sections. */ | |
252b5132 RH |
2406 | if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) |
2407 | return false; | |
2408 | ||
2409 | elf_hash_table (info)->dynamic_sections_created = true; | |
2410 | ||
2411 | return true; | |
2412 | } | |
2413 | ||
2414 | /* Add an entry to the .dynamic table. */ | |
2415 | ||
2416 | boolean | |
2417 | elf_add_dynamic_entry (info, tag, val) | |
2418 | struct bfd_link_info *info; | |
2419 | bfd_vma tag; | |
2420 | bfd_vma val; | |
2421 | { | |
2422 | Elf_Internal_Dyn dyn; | |
2423 | bfd *dynobj; | |
2424 | asection *s; | |
dc810e39 | 2425 | bfd_size_type newsize; |
252b5132 RH |
2426 | bfd_byte *newcontents; |
2427 | ||
8ea2e4bd NC |
2428 | if (! is_elf_hash_table (info)) |
2429 | return false; | |
2430 | ||
252b5132 RH |
2431 | dynobj = elf_hash_table (info)->dynobj; |
2432 | ||
2433 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2434 | BFD_ASSERT (s != NULL); | |
2435 | ||
2436 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
2437 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); | |
2438 | if (newcontents == NULL) | |
2439 | return false; | |
2440 | ||
2441 | dyn.d_tag = tag; | |
2442 | dyn.d_un.d_val = val; | |
2443 | elf_swap_dyn_out (dynobj, &dyn, | |
2444 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
2445 | ||
2446 | s->_raw_size = newsize; | |
2447 | s->contents = newcontents; | |
2448 | ||
2449 | return true; | |
2450 | } | |
2451 | \f | |
6b5bd373 MM |
2452 | /* Read and swap the relocs from the section indicated by SHDR. This |
2453 | may be either a REL or a RELA section. The relocations are | |
2454 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2455 | which should have already been allocated to contain enough space. | |
2456 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2457 | relocations should be stored. | |
2458 | ||
2459 | Returns false if something goes wrong. */ | |
2460 | ||
2461 | static boolean | |
2462 | elf_link_read_relocs_from_section (abfd, shdr, external_relocs, | |
2463 | internal_relocs) | |
2464 | bfd *abfd; | |
2465 | Elf_Internal_Shdr *shdr; | |
2466 | PTR external_relocs; | |
2467 | Elf_Internal_Rela *internal_relocs; | |
2468 | { | |
c7ac6ff8 | 2469 | struct elf_backend_data *bed; |
dc810e39 | 2470 | bfd_size_type amt; |
c7ac6ff8 | 2471 | |
6b5bd373 MM |
2472 | /* If there aren't any relocations, that's OK. */ |
2473 | if (!shdr) | |
2474 | return true; | |
2475 | ||
2476 | /* Position ourselves at the start of the section. */ | |
2477 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2478 | return false; | |
2479 | ||
2480 | /* Read the relocations. */ | |
dc810e39 | 2481 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) |
6b5bd373 MM |
2482 | return false; |
2483 | ||
c7ac6ff8 MM |
2484 | bed = get_elf_backend_data (abfd); |
2485 | ||
6b5bd373 MM |
2486 | /* Convert the external relocations to the internal format. */ |
2487 | if (shdr->sh_entsize == sizeof (Elf_External_Rel)) | |
2488 | { | |
2489 | Elf_External_Rel *erel; | |
2490 | Elf_External_Rel *erelend; | |
2491 | Elf_Internal_Rela *irela; | |
c7ac6ff8 | 2492 | Elf_Internal_Rel *irel; |
6b5bd373 MM |
2493 | |
2494 | erel = (Elf_External_Rel *) external_relocs; | |
d9bc7a44 | 2495 | erelend = erel + NUM_SHDR_ENTRIES (shdr); |
6b5bd373 | 2496 | irela = internal_relocs; |
dc810e39 AM |
2497 | amt = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rel); |
2498 | irel = bfd_alloc (abfd, amt); | |
c7ac6ff8 | 2499 | for (; erel < erelend; erel++, irela += bed->s->int_rels_per_ext_rel) |
6b5bd373 | 2500 | { |
4e8a9624 | 2501 | unsigned int i; |
c7ac6ff8 MM |
2502 | |
2503 | if (bed->s->swap_reloc_in) | |
2504 | (*bed->s->swap_reloc_in) (abfd, (bfd_byte *) erel, irel); | |
2505 | else | |
2506 | elf_swap_reloc_in (abfd, erel, irel); | |
6b5bd373 | 2507 | |
c7ac6ff8 MM |
2508 | for (i = 0; i < bed->s->int_rels_per_ext_rel; ++i) |
2509 | { | |
2510 | irela[i].r_offset = irel[i].r_offset; | |
2511 | irela[i].r_info = irel[i].r_info; | |
2512 | irela[i].r_addend = 0; | |
2513 | } | |
6b5bd373 MM |
2514 | } |
2515 | } | |
2516 | else | |
2517 | { | |
2518 | Elf_External_Rela *erela; | |
2519 | Elf_External_Rela *erelaend; | |
2520 | Elf_Internal_Rela *irela; | |
2521 | ||
2522 | BFD_ASSERT (shdr->sh_entsize == sizeof (Elf_External_Rela)); | |
2523 | ||
2524 | erela = (Elf_External_Rela *) external_relocs; | |
d9bc7a44 | 2525 | erelaend = erela + NUM_SHDR_ENTRIES (shdr); |
6b5bd373 | 2526 | irela = internal_relocs; |
c7ac6ff8 MM |
2527 | for (; erela < erelaend; erela++, irela += bed->s->int_rels_per_ext_rel) |
2528 | { | |
2529 | if (bed->s->swap_reloca_in) | |
2530 | (*bed->s->swap_reloca_in) (abfd, (bfd_byte *) erela, irela); | |
2531 | else | |
2532 | elf_swap_reloca_in (abfd, erela, irela); | |
2533 | } | |
6b5bd373 MM |
2534 | } |
2535 | ||
2536 | return true; | |
2537 | } | |
2538 | ||
23bc299b MM |
2539 | /* Read and swap the relocs for a section O. They may have been |
2540 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2541 | not NULL, they are used as buffers to read into. They are known to | |
2542 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2543 | the return value is allocated using either malloc or bfd_alloc, | |
2544 | according to the KEEP_MEMORY argument. If O has two relocation | |
2545 | sections (both REL and RELA relocations), then the REL_HDR | |
2546 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
2547 | REL_HDR2 relocations. */ | |
252b5132 RH |
2548 | |
2549 | Elf_Internal_Rela * | |
2550 | NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs, | |
2551 | keep_memory) | |
2552 | bfd *abfd; | |
2553 | asection *o; | |
2554 | PTR external_relocs; | |
2555 | Elf_Internal_Rela *internal_relocs; | |
2556 | boolean keep_memory; | |
2557 | { | |
2558 | Elf_Internal_Shdr *rel_hdr; | |
2559 | PTR alloc1 = NULL; | |
2560 | Elf_Internal_Rela *alloc2 = NULL; | |
c7ac6ff8 | 2561 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 RH |
2562 | |
2563 | if (elf_section_data (o)->relocs != NULL) | |
2564 | return elf_section_data (o)->relocs; | |
2565 | ||
2566 | if (o->reloc_count == 0) | |
2567 | return NULL; | |
2568 | ||
2569 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
2570 | ||
2571 | if (internal_relocs == NULL) | |
2572 | { | |
dc810e39 | 2573 | bfd_size_type size; |
252b5132 | 2574 | |
dc810e39 AM |
2575 | size = o->reloc_count; |
2576 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
252b5132 RH |
2577 | if (keep_memory) |
2578 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
2579 | else | |
2580 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); | |
2581 | if (internal_relocs == NULL) | |
2582 | goto error_return; | |
2583 | } | |
2584 | ||
2585 | if (external_relocs == NULL) | |
2586 | { | |
dc810e39 | 2587 | bfd_size_type size = rel_hdr->sh_size; |
6b5bd373 MM |
2588 | |
2589 | if (elf_section_data (o)->rel_hdr2) | |
dc810e39 | 2590 | size += elf_section_data (o)->rel_hdr2->sh_size; |
6b5bd373 | 2591 | alloc1 = (PTR) bfd_malloc (size); |
252b5132 RH |
2592 | if (alloc1 == NULL) |
2593 | goto error_return; | |
2594 | external_relocs = alloc1; | |
2595 | } | |
2596 | ||
6b5bd373 MM |
2597 | if (!elf_link_read_relocs_from_section (abfd, rel_hdr, |
2598 | external_relocs, | |
2599 | internal_relocs)) | |
2600 | goto error_return; | |
3e932841 KH |
2601 | if (!elf_link_read_relocs_from_section |
2602 | (abfd, | |
6b5bd373 | 2603 | elf_section_data (o)->rel_hdr2, |
2f5116e2 | 2604 | ((bfd_byte *) external_relocs) + rel_hdr->sh_size, |
d9bc7a44 | 2605 | internal_relocs + (NUM_SHDR_ENTRIES (rel_hdr) |
c7ac6ff8 | 2606 | * bed->s->int_rels_per_ext_rel))) |
252b5132 | 2607 | goto error_return; |
252b5132 RH |
2608 | |
2609 | /* Cache the results for next time, if we can. */ | |
2610 | if (keep_memory) | |
2611 | elf_section_data (o)->relocs = internal_relocs; | |
2612 | ||
2613 | if (alloc1 != NULL) | |
2614 | free (alloc1); | |
2615 | ||
2616 | /* Don't free alloc2, since if it was allocated we are passing it | |
2617 | back (under the name of internal_relocs). */ | |
2618 | ||
2619 | return internal_relocs; | |
2620 | ||
2621 | error_return: | |
2622 | if (alloc1 != NULL) | |
2623 | free (alloc1); | |
2624 | if (alloc2 != NULL) | |
2625 | free (alloc2); | |
2626 | return NULL; | |
2627 | } | |
2628 | \f | |
252b5132 RH |
2629 | /* Record an assignment to a symbol made by a linker script. We need |
2630 | this in case some dynamic object refers to this symbol. */ | |
2631 | ||
252b5132 RH |
2632 | boolean |
2633 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide) | |
7442e600 | 2634 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2635 | struct bfd_link_info *info; |
2636 | const char *name; | |
2637 | boolean provide; | |
2638 | { | |
2639 | struct elf_link_hash_entry *h; | |
2640 | ||
2641 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
2642 | return true; | |
2643 | ||
2644 | h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false); | |
2645 | if (h == NULL) | |
2646 | return false; | |
2647 | ||
2648 | if (h->root.type == bfd_link_hash_new) | |
a7b97311 | 2649 | h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
252b5132 RH |
2650 | |
2651 | /* If this symbol is being provided by the linker script, and it is | |
2652 | currently defined by a dynamic object, but not by a regular | |
2653 | object, then mark it as undefined so that the generic linker will | |
2654 | force the correct value. */ | |
2655 | if (provide | |
2656 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2657 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2658 | h->root.type = bfd_link_hash_undefined; | |
2659 | ||
2660 | /* If this symbol is not being provided by the linker script, and it is | |
2661 | currently defined by a dynamic object, but not by a regular object, | |
2662 | then clear out any version information because the symbol will not be | |
2663 | associated with the dynamic object any more. */ | |
2664 | if (!provide | |
2665 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2666 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2667 | h->verinfo.verdef = NULL; | |
2668 | ||
2669 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
994819d2 | 2670 | |
252b5132 RH |
2671 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC |
2672 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
2673 | || info->shared) | |
2674 | && h->dynindx == -1) | |
2675 | { | |
2676 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
2677 | return false; | |
2678 | ||
2679 | /* If this is a weak defined symbol, and we know a corresponding | |
2680 | real symbol from the same dynamic object, make sure the real | |
2681 | symbol is also made into a dynamic symbol. */ | |
2682 | if (h->weakdef != NULL | |
2683 | && h->weakdef->dynindx == -1) | |
2684 | { | |
2685 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
2686 | return false; | |
2687 | } | |
2688 | } | |
2689 | ||
2690 | return true; | |
2691 | } | |
2692 | \f | |
2693 | /* This structure is used to pass information to | |
2694 | elf_link_assign_sym_version. */ | |
2695 | ||
2696 | struct elf_assign_sym_version_info | |
2697 | { | |
2698 | /* Output BFD. */ | |
2699 | bfd *output_bfd; | |
2700 | /* General link information. */ | |
2701 | struct bfd_link_info *info; | |
2702 | /* Version tree. */ | |
2703 | struct bfd_elf_version_tree *verdefs; | |
252b5132 RH |
2704 | /* Whether we had a failure. */ |
2705 | boolean failed; | |
2706 | }; | |
2707 | ||
2708 | /* This structure is used to pass information to | |
2709 | elf_link_find_version_dependencies. */ | |
2710 | ||
2711 | struct elf_find_verdep_info | |
2712 | { | |
2713 | /* Output BFD. */ | |
2714 | bfd *output_bfd; | |
2715 | /* General link information. */ | |
2716 | struct bfd_link_info *info; | |
2717 | /* The number of dependencies. */ | |
2718 | unsigned int vers; | |
2719 | /* Whether we had a failure. */ | |
2720 | boolean failed; | |
2721 | }; | |
2722 | ||
2723 | /* Array used to determine the number of hash table buckets to use | |
2724 | based on the number of symbols there are. If there are fewer than | |
2725 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
2726 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
2727 | than 32771 buckets. */ | |
2728 | ||
2729 | static const size_t elf_buckets[] = | |
2730 | { | |
2731 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
2732 | 16411, 32771, 0 | |
2733 | }; | |
2734 | ||
2735 | /* Compute bucket count for hashing table. We do not use a static set | |
2736 | of possible tables sizes anymore. Instead we determine for all | |
2737 | possible reasonable sizes of the table the outcome (i.e., the | |
2738 | number of collisions etc) and choose the best solution. The | |
2739 | weighting functions are not too simple to allow the table to grow | |
2740 | without bounds. Instead one of the weighting factors is the size. | |
2741 | Therefore the result is always a good payoff between few collisions | |
2742 | (= short chain lengths) and table size. */ | |
2743 | static size_t | |
2744 | compute_bucket_count (info) | |
2745 | struct bfd_link_info *info; | |
2746 | { | |
2747 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; | |
7442e600 | 2748 | size_t best_size = 0; |
252b5132 RH |
2749 | unsigned long int *hashcodes; |
2750 | unsigned long int *hashcodesp; | |
2751 | unsigned long int i; | |
dc810e39 | 2752 | bfd_size_type amt; |
252b5132 RH |
2753 | |
2754 | /* Compute the hash values for all exported symbols. At the same | |
2755 | time store the values in an array so that we could use them for | |
2756 | optimizations. */ | |
dc810e39 AM |
2757 | amt = dynsymcount; |
2758 | amt *= sizeof (unsigned long int); | |
2759 | hashcodes = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2760 | if (hashcodes == NULL) |
2761 | return 0; | |
2762 | hashcodesp = hashcodes; | |
2763 | ||
2764 | /* Put all hash values in HASHCODES. */ | |
2765 | elf_link_hash_traverse (elf_hash_table (info), | |
2766 | elf_collect_hash_codes, &hashcodesp); | |
2767 | ||
58821868 AM |
2768 | /* We have a problem here. The following code to optimize the table |
2769 | size requires an integer type with more the 32 bits. If | |
2770 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
252b5132 | 2771 | #ifdef BFD_HOST_U_64_BIT |
82e51918 | 2772 | if (info->optimize) |
252b5132 RH |
2773 | { |
2774 | unsigned long int nsyms = hashcodesp - hashcodes; | |
2775 | size_t minsize; | |
2776 | size_t maxsize; | |
2777 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
2778 | unsigned long int *counts ; | |
2779 | ||
2780 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
2781 | that the hashing table must at least have NSYMS/4 and at most | |
2782 | 2*NSYMS buckets. */ | |
2783 | minsize = nsyms / 4; | |
2784 | if (minsize == 0) | |
2785 | minsize = 1; | |
2786 | best_size = maxsize = nsyms * 2; | |
2787 | ||
2788 | /* Create array where we count the collisions in. We must use bfd_malloc | |
2789 | since the size could be large. */ | |
dc810e39 AM |
2790 | amt = maxsize; |
2791 | amt *= sizeof (unsigned long int); | |
2792 | counts = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2793 | if (counts == NULL) |
2794 | { | |
2795 | free (hashcodes); | |
2796 | return 0; | |
2797 | } | |
2798 | ||
2799 | /* Compute the "optimal" size for the hash table. The criteria is a | |
2800 | minimal chain length. The minor criteria is (of course) the size | |
2801 | of the table. */ | |
2802 | for (i = minsize; i < maxsize; ++i) | |
2803 | { | |
2804 | /* Walk through the array of hashcodes and count the collisions. */ | |
2805 | BFD_HOST_U_64_BIT max; | |
2806 | unsigned long int j; | |
2807 | unsigned long int fact; | |
2808 | ||
2809 | memset (counts, '\0', i * sizeof (unsigned long int)); | |
2810 | ||
2811 | /* Determine how often each hash bucket is used. */ | |
2812 | for (j = 0; j < nsyms; ++j) | |
2813 | ++counts[hashcodes[j] % i]; | |
2814 | ||
2815 | /* For the weight function we need some information about the | |
2816 | pagesize on the target. This is information need not be 100% | |
2817 | accurate. Since this information is not available (so far) we | |
2818 | define it here to a reasonable default value. If it is crucial | |
2819 | to have a better value some day simply define this value. */ | |
2820 | # ifndef BFD_TARGET_PAGESIZE | |
2821 | # define BFD_TARGET_PAGESIZE (4096) | |
2822 | # endif | |
2823 | ||
2824 | /* We in any case need 2 + NSYMS entries for the size values and | |
2825 | the chains. */ | |
2826 | max = (2 + nsyms) * (ARCH_SIZE / 8); | |
2827 | ||
2828 | # if 1 | |
2829 | /* Variant 1: optimize for short chains. We add the squares | |
2830 | of all the chain lengths (which favous many small chain | |
2831 | over a few long chains). */ | |
2832 | for (j = 0; j < i; ++j) | |
2833 | max += counts[j] * counts[j]; | |
2834 | ||
2835 | /* This adds penalties for the overall size of the table. */ | |
2836 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2837 | max *= fact * fact; | |
2838 | # else | |
2839 | /* Variant 2: Optimize a lot more for small table. Here we | |
2840 | also add squares of the size but we also add penalties for | |
2841 | empty slots (the +1 term). */ | |
2842 | for (j = 0; j < i; ++j) | |
2843 | max += (1 + counts[j]) * (1 + counts[j]); | |
2844 | ||
2845 | /* The overall size of the table is considered, but not as | |
2846 | strong as in variant 1, where it is squared. */ | |
2847 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2848 | max *= fact; | |
2849 | # endif | |
2850 | ||
2851 | /* Compare with current best results. */ | |
2852 | if (max < best_chlen) | |
2853 | { | |
2854 | best_chlen = max; | |
2855 | best_size = i; | |
2856 | } | |
2857 | } | |
2858 | ||
2859 | free (counts); | |
2860 | } | |
2861 | else | |
2862 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
2863 | { | |
2864 | /* This is the fallback solution if no 64bit type is available or if we | |
2865 | are not supposed to spend much time on optimizations. We select the | |
2866 | bucket count using a fixed set of numbers. */ | |
2867 | for (i = 0; elf_buckets[i] != 0; i++) | |
2868 | { | |
2869 | best_size = elf_buckets[i]; | |
2870 | if (dynsymcount < elf_buckets[i + 1]) | |
2871 | break; | |
2872 | } | |
2873 | } | |
2874 | ||
2875 | /* Free the arrays we needed. */ | |
2876 | free (hashcodes); | |
2877 | ||
2878 | return best_size; | |
2879 | } | |
2880 | ||
2881 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
2882 | called by the ELF linker emulation before_allocation routine. We | |
2883 | must set the sizes of the sections before the linker sets the | |
2884 | addresses of the various sections. */ | |
2885 | ||
2886 | boolean | |
2887 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, | |
99293407 | 2888 | filter_shlib, |
252b5132 RH |
2889 | auxiliary_filters, info, sinterpptr, |
2890 | verdefs) | |
2891 | bfd *output_bfd; | |
2892 | const char *soname; | |
2893 | const char *rpath; | |
252b5132 RH |
2894 | const char *filter_shlib; |
2895 | const char * const *auxiliary_filters; | |
2896 | struct bfd_link_info *info; | |
2897 | asection **sinterpptr; | |
2898 | struct bfd_elf_version_tree *verdefs; | |
2899 | { | |
2900 | bfd_size_type soname_indx; | |
25e27870 | 2901 | bfd *dynobj; |
252b5132 | 2902 | struct elf_backend_data *bed; |
252b5132 RH |
2903 | struct elf_assign_sym_version_info asvinfo; |
2904 | ||
2905 | *sinterpptr = NULL; | |
2906 | ||
2907 | soname_indx = (bfd_size_type) -1; | |
2908 | ||
2909 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
2910 | return true; | |
2911 | ||
8ea2e4bd | 2912 | if (! is_elf_hash_table (info)) |
cc36acdf | 2913 | return true; |
8ea2e4bd | 2914 | |
51b64d56 AM |
2915 | /* Any syms created from now on start with -1 in |
2916 | got.refcount/offset and plt.refcount/offset. */ | |
2917 | elf_hash_table (info)->init_refcount = -1; | |
2918 | ||
252b5132 RH |
2919 | /* The backend may have to create some sections regardless of whether |
2920 | we're dynamic or not. */ | |
2921 | bed = get_elf_backend_data (output_bfd); | |
2922 | if (bed->elf_backend_always_size_sections | |
2923 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
2924 | return false; | |
2925 | ||
2926 | dynobj = elf_hash_table (info)->dynobj; | |
2927 | ||
2928 | /* If there were no dynamic objects in the link, there is nothing to | |
2929 | do here. */ | |
2930 | if (dynobj == NULL) | |
2931 | return true; | |
2932 | ||
68f69152 JJ |
2933 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
2934 | return false; | |
2935 | ||
252b5132 RH |
2936 | if (elf_hash_table (info)->dynamic_sections_created) |
2937 | { | |
2938 | struct elf_info_failed eif; | |
2939 | struct elf_link_hash_entry *h; | |
fc8c40a0 | 2940 | asection *dynstr; |
252b5132 RH |
2941 | |
2942 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
2943 | BFD_ASSERT (*sinterpptr != NULL || info->shared); | |
2944 | ||
2945 | if (soname != NULL) | |
2946 | { | |
2b0f7ef9 JJ |
2947 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
2948 | soname, true); | |
252b5132 | 2949 | if (soname_indx == (bfd_size_type) -1 |
dc810e39 AM |
2950 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SONAME, |
2951 | soname_indx)) | |
252b5132 RH |
2952 | return false; |
2953 | } | |
2954 | ||
2955 | if (info->symbolic) | |
2956 | { | |
dc810e39 AM |
2957 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMBOLIC, |
2958 | (bfd_vma) 0)) | |
252b5132 | 2959 | return false; |
d6cf2879 | 2960 | info->flags |= DF_SYMBOLIC; |
252b5132 RH |
2961 | } |
2962 | ||
2963 | if (rpath != NULL) | |
2964 | { | |
2965 | bfd_size_type indx; | |
2966 | ||
2b0f7ef9 JJ |
2967 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, |
2968 | true); | |
2969 | if (info->new_dtags) | |
2970 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, indx); | |
252b5132 | 2971 | if (indx == (bfd_size_type) -1 |
dc810e39 | 2972 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_RPATH, indx) |
c25373b7 | 2973 | || (info->new_dtags |
dc810e39 AM |
2974 | && ! elf_add_dynamic_entry (info, (bfd_vma) DT_RUNPATH, |
2975 | indx))) | |
252b5132 RH |
2976 | return false; |
2977 | } | |
2978 | ||
2979 | if (filter_shlib != NULL) | |
2980 | { | |
2981 | bfd_size_type indx; | |
2982 | ||
2b0f7ef9 JJ |
2983 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
2984 | filter_shlib, true); | |
252b5132 | 2985 | if (indx == (bfd_size_type) -1 |
dc810e39 | 2986 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_FILTER, indx)) |
252b5132 RH |
2987 | return false; |
2988 | } | |
2989 | ||
2990 | if (auxiliary_filters != NULL) | |
2991 | { | |
2992 | const char * const *p; | |
2993 | ||
2994 | for (p = auxiliary_filters; *p != NULL; p++) | |
2995 | { | |
2996 | bfd_size_type indx; | |
2997 | ||
2b0f7ef9 JJ |
2998 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
2999 | *p, true); | |
252b5132 | 3000 | if (indx == (bfd_size_type) -1 |
dc810e39 AM |
3001 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_AUXILIARY, |
3002 | indx)) | |
252b5132 RH |
3003 | return false; |
3004 | } | |
3005 | } | |
3006 | ||
391a809a | 3007 | eif.info = info; |
bc2b6df7 | 3008 | eif.verdefs = verdefs; |
391a809a AM |
3009 | eif.failed = false; |
3010 | ||
ea44b734 | 3011 | /* If we are supposed to export all symbols into the dynamic symbol |
c44233aa | 3012 | table (this is not the normal case), then do so. */ |
99293407 | 3013 | if (info->export_dynamic) |
ea44b734 | 3014 | { |
ea44b734 | 3015 | elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol, |
c44233aa | 3016 | (PTR) &eif); |
ea44b734 RH |
3017 | if (eif.failed) |
3018 | return false; | |
3019 | } | |
3020 | ||
252b5132 RH |
3021 | /* Attach all the symbols to their version information. */ |
3022 | asvinfo.output_bfd = output_bfd; | |
3023 | asvinfo.info = info; | |
3024 | asvinfo.verdefs = verdefs; | |
252b5132 RH |
3025 | asvinfo.failed = false; |
3026 | ||
3027 | elf_link_hash_traverse (elf_hash_table (info), | |
3028 | elf_link_assign_sym_version, | |
3029 | (PTR) &asvinfo); | |
3030 | if (asvinfo.failed) | |
3031 | return false; | |
3032 | ||
3033 | /* Find all symbols which were defined in a dynamic object and make | |
3034 | the backend pick a reasonable value for them. */ | |
252b5132 RH |
3035 | elf_link_hash_traverse (elf_hash_table (info), |
3036 | elf_adjust_dynamic_symbol, | |
3037 | (PTR) &eif); | |
3038 | if (eif.failed) | |
3039 | return false; | |
3040 | ||
3041 | /* Add some entries to the .dynamic section. We fill in some of the | |
3042 | values later, in elf_bfd_final_link, but we must add the entries | |
3043 | now so that we know the final size of the .dynamic section. */ | |
f0c2e336 MM |
3044 | |
3045 | /* If there are initialization and/or finalization functions to | |
3046 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
3047 | h = (info->init_function | |
3e932841 | 3048 | ? elf_link_hash_lookup (elf_hash_table (info), |
f0c2e336 MM |
3049 | info->init_function, false, |
3050 | false, false) | |
3051 | : NULL); | |
252b5132 RH |
3052 | if (h != NULL |
3053 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3054 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3055 | { | |
dc810e39 | 3056 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_INIT, (bfd_vma) 0)) |
252b5132 RH |
3057 | return false; |
3058 | } | |
f0c2e336 | 3059 | h = (info->fini_function |
3e932841 | 3060 | ? elf_link_hash_lookup (elf_hash_table (info), |
f0c2e336 MM |
3061 | info->fini_function, false, |
3062 | false, false) | |
3063 | : NULL); | |
252b5132 RH |
3064 | if (h != NULL |
3065 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3066 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3067 | { | |
dc810e39 | 3068 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FINI, (bfd_vma) 0)) |
252b5132 RH |
3069 | return false; |
3070 | } | |
f0c2e336 | 3071 | |
fa7ea4d8 AM |
3072 | if (bfd_get_section_by_name (output_bfd, ".preinit_array") != NULL) |
3073 | { | |
3074 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
3075 | if (info->shared) | |
3076 | { | |
3077 | bfd *sub; | |
3078 | asection *o; | |
3079 | ||
3080 | for (sub = info->input_bfds; sub != NULL; | |
3081 | sub = sub->link_next) | |
3082 | for (o = sub->sections; o != NULL; o = o->next) | |
3083 | if (elf_section_data (o)->this_hdr.sh_type | |
3084 | == SHT_PREINIT_ARRAY) | |
3085 | { | |
3086 | (*_bfd_error_handler) | |
3087 | (_("%s: .preinit_array section is not allowed in DSO"), | |
58821868 | 3088 | bfd_archive_filename (sub)); |
fa7ea4d8 AM |
3089 | break; |
3090 | } | |
60166579 | 3091 | |
36b4f6e7 | 3092 | bfd_set_error (bfd_error_nonrepresentable_section); |
60166579 | 3093 | return false; |
fa7ea4d8 AM |
3094 | } |
3095 | ||
3096 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAY, | |
3097 | (bfd_vma) 0) | |
3098 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAYSZ, | |
3099 | (bfd_vma) 0)) | |
3100 | return false; | |
3101 | } | |
3102 | if (bfd_get_section_by_name (output_bfd, ".init_array") != NULL) | |
3103 | { | |
3104 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAY, | |
3105 | (bfd_vma) 0) | |
3106 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAYSZ, | |
3107 | (bfd_vma) 0)) | |
3108 | return false; | |
3109 | } | |
3110 | if (bfd_get_section_by_name (output_bfd, ".fini_array") != NULL) | |
3111 | { | |
3112 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAY, | |
3113 | (bfd_vma) 0) | |
3114 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAYSZ, | |
3115 | (bfd_vma) 0)) | |
3116 | return false; | |
3117 | } | |
30831527 | 3118 | |
fc8c40a0 AM |
3119 | dynstr = bfd_get_section_by_name (dynobj, ".dynstr"); |
3120 | /* If .dynstr is excluded from the link, we don't want any of | |
3121 | these tags. Strictly, we should be checking each section | |
3122 | individually; This quick check covers for the case where | |
3123 | someone does a /DISCARD/ : { *(*) }. */ | |
3124 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
3125 | { | |
3126 | bfd_size_type strsize; | |
3127 | ||
2b0f7ef9 | 3128 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
dc810e39 AM |
3129 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_HASH, (bfd_vma) 0) |
3130 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRTAB, (bfd_vma) 0) | |
3131 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMTAB, (bfd_vma) 0) | |
3132 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRSZ, strsize) | |
3133 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMENT, | |
3134 | (bfd_vma) sizeof (Elf_External_Sym))) | |
fc8c40a0 AM |
3135 | return false; |
3136 | } | |
252b5132 RH |
3137 | } |
3138 | ||
3139 | /* The backend must work out the sizes of all the other dynamic | |
3140 | sections. */ | |
252b5132 RH |
3141 | if (bed->elf_backend_size_dynamic_sections |
3142 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
3143 | return false; | |
3144 | ||
3145 | if (elf_hash_table (info)->dynamic_sections_created) | |
3146 | { | |
dc810e39 | 3147 | bfd_size_type dynsymcount; |
252b5132 RH |
3148 | asection *s; |
3149 | size_t bucketcount = 0; | |
c7ac6ff8 | 3150 | size_t hash_entry_size; |
db6751f2 | 3151 | unsigned int dtagcount; |
252b5132 RH |
3152 | |
3153 | /* Set up the version definition section. */ | |
3154 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
3155 | BFD_ASSERT (s != NULL); | |
3156 | ||
3157 | /* We may have created additional version definitions if we are | |
c44233aa | 3158 | just linking a regular application. */ |
252b5132 RH |
3159 | verdefs = asvinfo.verdefs; |
3160 | ||
6b9b879a JJ |
3161 | /* Skip anonymous version tag. */ |
3162 | if (verdefs != NULL && verdefs->vernum == 0) | |
3163 | verdefs = verdefs->next; | |
3164 | ||
252b5132 | 3165 | if (verdefs == NULL) |
7f8d5fc9 | 3166 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3167 | else |
3168 | { | |
3169 | unsigned int cdefs; | |
3170 | bfd_size_type size; | |
3171 | struct bfd_elf_version_tree *t; | |
3172 | bfd_byte *p; | |
3173 | Elf_Internal_Verdef def; | |
3174 | Elf_Internal_Verdaux defaux; | |
3175 | ||
252b5132 RH |
3176 | cdefs = 0; |
3177 | size = 0; | |
3178 | ||
3179 | /* Make space for the base version. */ | |
3180 | size += sizeof (Elf_External_Verdef); | |
3181 | size += sizeof (Elf_External_Verdaux); | |
3182 | ++cdefs; | |
3183 | ||
3184 | for (t = verdefs; t != NULL; t = t->next) | |
3185 | { | |
3186 | struct bfd_elf_version_deps *n; | |
3187 | ||
3188 | size += sizeof (Elf_External_Verdef); | |
3189 | size += sizeof (Elf_External_Verdaux); | |
3190 | ++cdefs; | |
3191 | ||
3192 | for (n = t->deps; n != NULL; n = n->next) | |
3193 | size += sizeof (Elf_External_Verdaux); | |
3194 | } | |
3195 | ||
3196 | s->_raw_size = size; | |
3197 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3198 | if (s->contents == NULL && s->_raw_size != 0) | |
3199 | return false; | |
3200 | ||
3201 | /* Fill in the version definition section. */ | |
3202 | ||
3203 | p = s->contents; | |
3204 | ||
3205 | def.vd_version = VER_DEF_CURRENT; | |
3206 | def.vd_flags = VER_FLG_BASE; | |
3207 | def.vd_ndx = 1; | |
3208 | def.vd_cnt = 1; | |
3209 | def.vd_aux = sizeof (Elf_External_Verdef); | |
3210 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3211 | + sizeof (Elf_External_Verdaux)); | |
3212 | ||
3213 | if (soname_indx != (bfd_size_type) -1) | |
3214 | { | |
2b0f7ef9 JJ |
3215 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3216 | soname_indx); | |
3a99b017 | 3217 | def.vd_hash = bfd_elf_hash (soname); |
252b5132 RH |
3218 | defaux.vda_name = soname_indx; |
3219 | } | |
3220 | else | |
3221 | { | |
3222 | const char *name; | |
3223 | bfd_size_type indx; | |
3224 | ||
96fd004e | 3225 | name = basename (output_bfd->filename); |
3a99b017 | 3226 | def.vd_hash = bfd_elf_hash (name); |
2b0f7ef9 JJ |
3227 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
3228 | name, false); | |
252b5132 RH |
3229 | if (indx == (bfd_size_type) -1) |
3230 | return false; | |
3231 | defaux.vda_name = indx; | |
3232 | } | |
3233 | defaux.vda_next = 0; | |
3234 | ||
3235 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
a7b97311 | 3236 | (Elf_External_Verdef *) p); |
252b5132 RH |
3237 | p += sizeof (Elf_External_Verdef); |
3238 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3239 | (Elf_External_Verdaux *) p); | |
3240 | p += sizeof (Elf_External_Verdaux); | |
3241 | ||
3242 | for (t = verdefs; t != NULL; t = t->next) | |
3243 | { | |
3244 | unsigned int cdeps; | |
3245 | struct bfd_elf_version_deps *n; | |
3246 | struct elf_link_hash_entry *h; | |
3247 | ||
3248 | cdeps = 0; | |
3249 | for (n = t->deps; n != NULL; n = n->next) | |
3250 | ++cdeps; | |
3251 | ||
3252 | /* Add a symbol representing this version. */ | |
3253 | h = NULL; | |
3254 | if (! (_bfd_generic_link_add_one_symbol | |
3255 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
3256 | (bfd_vma) 0, (const char *) NULL, false, | |
3257 | get_elf_backend_data (dynobj)->collect, | |
3258 | (struct bfd_link_hash_entry **) &h))) | |
3259 | return false; | |
3260 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
3261 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3262 | h->type = STT_OBJECT; | |
3263 | h->verinfo.vertree = t; | |
3264 | ||
3265 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
3266 | return false; | |
3267 | ||
3268 | def.vd_version = VER_DEF_CURRENT; | |
3269 | def.vd_flags = 0; | |
3270 | if (t->globals == NULL && t->locals == NULL && ! t->used) | |
3271 | def.vd_flags |= VER_FLG_WEAK; | |
3272 | def.vd_ndx = t->vernum + 1; | |
3273 | def.vd_cnt = cdeps + 1; | |
3a99b017 | 3274 | def.vd_hash = bfd_elf_hash (t->name); |
252b5132 RH |
3275 | def.vd_aux = sizeof (Elf_External_Verdef); |
3276 | if (t->next != NULL) | |
3277 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3278 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
3279 | else | |
3280 | def.vd_next = 0; | |
3281 | ||
3282 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
3283 | (Elf_External_Verdef *) p); | |
3284 | p += sizeof (Elf_External_Verdef); | |
3285 | ||
3286 | defaux.vda_name = h->dynstr_index; | |
2b0f7ef9 JJ |
3287 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3288 | h->dynstr_index); | |
252b5132 RH |
3289 | if (t->deps == NULL) |
3290 | defaux.vda_next = 0; | |
3291 | else | |
3292 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3293 | t->name_indx = defaux.vda_name; | |
3294 | ||
3295 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3296 | (Elf_External_Verdaux *) p); | |
3297 | p += sizeof (Elf_External_Verdaux); | |
3298 | ||
3299 | for (n = t->deps; n != NULL; n = n->next) | |
3300 | { | |
3301 | if (n->version_needed == NULL) | |
3302 | { | |
3303 | /* This can happen if there was an error in the | |
3304 | version script. */ | |
3305 | defaux.vda_name = 0; | |
3306 | } | |
3307 | else | |
2b0f7ef9 JJ |
3308 | { |
3309 | defaux.vda_name = n->version_needed->name_indx; | |
3310 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
3311 | defaux.vda_name); | |
3312 | } | |
252b5132 RH |
3313 | if (n->next == NULL) |
3314 | defaux.vda_next = 0; | |
3315 | else | |
3316 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3317 | ||
3318 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3319 | (Elf_External_Verdaux *) p); | |
3320 | p += sizeof (Elf_External_Verdaux); | |
3321 | } | |
3322 | } | |
3323 | ||
dc810e39 AM |
3324 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEF, (bfd_vma) 0) |
3325 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEFNUM, | |
3326 | (bfd_vma) cdefs)) | |
252b5132 RH |
3327 | return false; |
3328 | ||
3329 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
3330 | } | |
3331 | ||
13ae64f3 | 3332 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) |
d6cf2879 | 3333 | { |
dc810e39 | 3334 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS, info->flags)) |
d6cf2879 L |
3335 | return false; |
3336 | } | |
3337 | ||
4d538889 | 3338 | if (info->flags_1) |
d6cf2879 L |
3339 | { |
3340 | if (! info->shared) | |
3341 | info->flags_1 &= ~ (DF_1_INITFIRST | |
3342 | | DF_1_NODELETE | |
3343 | | DF_1_NOOPEN); | |
dc810e39 AM |
3344 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS_1, |
3345 | info->flags_1)) | |
d6cf2879 L |
3346 | return false; |
3347 | } | |
3348 | ||
252b5132 RH |
3349 | /* Work out the size of the version reference section. */ |
3350 | ||
3351 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
3352 | BFD_ASSERT (s != NULL); | |
3353 | { | |
3354 | struct elf_find_verdep_info sinfo; | |
3355 | ||
3356 | sinfo.output_bfd = output_bfd; | |
3357 | sinfo.info = info; | |
3358 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
3359 | if (sinfo.vers == 0) | |
3360 | sinfo.vers = 1; | |
3361 | sinfo.failed = false; | |
3362 | ||
3363 | elf_link_hash_traverse (elf_hash_table (info), | |
3364 | elf_link_find_version_dependencies, | |
3365 | (PTR) &sinfo); | |
3366 | ||
3367 | if (elf_tdata (output_bfd)->verref == NULL) | |
7f8d5fc9 | 3368 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3369 | else |
3370 | { | |
3371 | Elf_Internal_Verneed *t; | |
3372 | unsigned int size; | |
3373 | unsigned int crefs; | |
3374 | bfd_byte *p; | |
3375 | ||
3376 | /* Build the version definition section. */ | |
3377 | size = 0; | |
3378 | crefs = 0; | |
3379 | for (t = elf_tdata (output_bfd)->verref; | |
3380 | t != NULL; | |
3381 | t = t->vn_nextref) | |
3382 | { | |
3383 | Elf_Internal_Vernaux *a; | |
3384 | ||
3385 | size += sizeof (Elf_External_Verneed); | |
3386 | ++crefs; | |
3387 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3388 | size += sizeof (Elf_External_Vernaux); | |
3389 | } | |
3390 | ||
3391 | s->_raw_size = size; | |
dc810e39 | 3392 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); |
252b5132 RH |
3393 | if (s->contents == NULL) |
3394 | return false; | |
3395 | ||
3396 | p = s->contents; | |
3397 | for (t = elf_tdata (output_bfd)->verref; | |
3398 | t != NULL; | |
3399 | t = t->vn_nextref) | |
3400 | { | |
3401 | unsigned int caux; | |
3402 | Elf_Internal_Vernaux *a; | |
3403 | bfd_size_type indx; | |
3404 | ||
3405 | caux = 0; | |
3406 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3407 | ++caux; | |
3408 | ||
3409 | t->vn_version = VER_NEED_CURRENT; | |
3410 | t->vn_cnt = caux; | |
2b0f7ef9 JJ |
3411 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
3412 | elf_dt_name (t->vn_bfd) != NULL | |
3413 | ? elf_dt_name (t->vn_bfd) | |
3414 | : basename (t->vn_bfd->filename), | |
3415 | false); | |
252b5132 RH |
3416 | if (indx == (bfd_size_type) -1) |
3417 | return false; | |
3418 | t->vn_file = indx; | |
3419 | t->vn_aux = sizeof (Elf_External_Verneed); | |
3420 | if (t->vn_nextref == NULL) | |
3421 | t->vn_next = 0; | |
3422 | else | |
3423 | t->vn_next = (sizeof (Elf_External_Verneed) | |
3424 | + caux * sizeof (Elf_External_Vernaux)); | |
3425 | ||
3426 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
3427 | (Elf_External_Verneed *) p); | |
3428 | p += sizeof (Elf_External_Verneed); | |
3429 | ||
3430 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3431 | { | |
3a99b017 | 3432 | a->vna_hash = bfd_elf_hash (a->vna_nodename); |
2b0f7ef9 JJ |
3433 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
3434 | a->vna_nodename, false); | |
252b5132 RH |
3435 | if (indx == (bfd_size_type) -1) |
3436 | return false; | |
3437 | a->vna_name = indx; | |
3438 | if (a->vna_nextptr == NULL) | |
3439 | a->vna_next = 0; | |
3440 | else | |
3441 | a->vna_next = sizeof (Elf_External_Vernaux); | |
3442 | ||
3443 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
3444 | (Elf_External_Vernaux *) p); | |
3445 | p += sizeof (Elf_External_Vernaux); | |
3446 | } | |
3447 | } | |
3448 | ||
dc810e39 AM |
3449 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEED, |
3450 | (bfd_vma) 0) | |
3451 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEEDNUM, | |
3452 | (bfd_vma) crefs)) | |
252b5132 RH |
3453 | return false; |
3454 | ||
3455 | elf_tdata (output_bfd)->cverrefs = crefs; | |
3456 | } | |
3457 | } | |
3458 | ||
3e932841 | 3459 | /* Assign dynsym indicies. In a shared library we generate a |
30b30c21 RH |
3460 | section symbol for each output section, which come first. |
3461 | Next come all of the back-end allocated local dynamic syms, | |
3462 | followed by the rest of the global symbols. */ | |
3463 | ||
3464 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); | |
252b5132 RH |
3465 | |
3466 | /* Work out the size of the symbol version section. */ | |
3467 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
3468 | BFD_ASSERT (s != NULL); | |
3469 | if (dynsymcount == 0 | |
3470 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
3471 | { | |
7f8d5fc9 | 3472 | _bfd_strip_section_from_output (info, s); |
42751cf3 MM |
3473 | /* The DYNSYMCOUNT might have changed if we were going to |
3474 | output a dynamic symbol table entry for S. */ | |
30b30c21 | 3475 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); |
252b5132 RH |
3476 | } |
3477 | else | |
3478 | { | |
3479 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); | |
3480 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); | |
3481 | if (s->contents == NULL) | |
3482 | return false; | |
3483 | ||
dc810e39 | 3484 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERSYM, (bfd_vma) 0)) |
252b5132 RH |
3485 | return false; |
3486 | } | |
3487 | ||
3488 | /* Set the size of the .dynsym and .hash sections. We counted | |
3489 | the number of dynamic symbols in elf_link_add_object_symbols. | |
3490 | We will build the contents of .dynsym and .hash when we build | |
3491 | the final symbol table, because until then we do not know the | |
3492 | correct value to give the symbols. We built the .dynstr | |
3493 | section as we went along in elf_link_add_object_symbols. */ | |
3494 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
3495 | BFD_ASSERT (s != NULL); | |
3496 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
3497 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3498 | if (s->contents == NULL && s->_raw_size != 0) | |
3499 | return false; | |
3500 | ||
fc8c40a0 AM |
3501 | if (dynsymcount != 0) |
3502 | { | |
3503 | Elf_Internal_Sym isym; | |
3504 | ||
3505 | /* The first entry in .dynsym is a dummy symbol. */ | |
3506 | isym.st_value = 0; | |
3507 | isym.st_size = 0; | |
3508 | isym.st_name = 0; | |
3509 | isym.st_info = 0; | |
3510 | isym.st_other = 0; | |
3511 | isym.st_shndx = 0; | |
9ad5cbcf | 3512 | elf_swap_symbol_out (output_bfd, &isym, (PTR) s->contents, (PTR) 0); |
fc8c40a0 | 3513 | } |
252b5132 RH |
3514 | |
3515 | /* Compute the size of the hashing table. As a side effect this | |
3516 | computes the hash values for all the names we export. */ | |
3517 | bucketcount = compute_bucket_count (info); | |
3518 | ||
3519 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
3520 | BFD_ASSERT (s != NULL); | |
c7ac6ff8 MM |
3521 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; |
3522 | s->_raw_size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
1126897b | 3523 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
252b5132 RH |
3524 | if (s->contents == NULL) |
3525 | return false; | |
252b5132 | 3526 | |
dc810e39 AM |
3527 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) bucketcount, |
3528 | s->contents); | |
3529 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) dynsymcount, | |
c7ac6ff8 | 3530 | s->contents + hash_entry_size); |
252b5132 RH |
3531 | |
3532 | elf_hash_table (info)->bucketcount = bucketcount; | |
3533 | ||
3534 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
3535 | BFD_ASSERT (s != NULL); | |
2b0f7ef9 JJ |
3536 | |
3537 | elf_finalize_dynstr (output_bfd, info); | |
3538 | ||
3539 | s->_raw_size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
252b5132 | 3540 | |
db6751f2 | 3541 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) |
dc810e39 | 3542 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NULL, (bfd_vma) 0)) |
db6751f2 | 3543 | return false; |
252b5132 RH |
3544 | } |
3545 | ||
3546 | return true; | |
3547 | } | |
3548 | \f | |
2b0f7ef9 JJ |
3549 | /* This function is used to adjust offsets into .dynstr for |
3550 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
c44233aa | 3551 | |
2b0f7ef9 JJ |
3552 | static boolean elf_adjust_dynstr_offsets |
3553 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
c44233aa | 3554 | |
2b0f7ef9 JJ |
3555 | static boolean |
3556 | elf_adjust_dynstr_offsets (h, data) | |
3557 | struct elf_link_hash_entry *h; | |
3558 | PTR data; | |
3559 | { | |
3560 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; | |
3561 | ||
e92d460e AM |
3562 | if (h->root.type == bfd_link_hash_warning) |
3563 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3564 | ||
2b0f7ef9 JJ |
3565 | if (h->dynindx != -1) |
3566 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3567 | return true; | |
3568 | } | |
3569 | ||
3570 | /* Assign string offsets in .dynstr, update all structures referencing | |
3571 | them. */ | |
3572 | ||
3573 | static boolean | |
3574 | elf_finalize_dynstr (output_bfd, info) | |
3575 | bfd *output_bfd; | |
3576 | struct bfd_link_info *info; | |
3577 | { | |
3578 | struct elf_link_local_dynamic_entry *entry; | |
3579 | struct elf_strtab_hash *dynstr = elf_hash_table (info)->dynstr; | |
3580 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
3581 | asection *sdyn; | |
3582 | bfd_size_type size; | |
3583 | Elf_External_Dyn *dyncon, *dynconend; | |
3584 | ||
3585 | _bfd_elf_strtab_finalize (dynstr); | |
3586 | size = _bfd_elf_strtab_size (dynstr); | |
3587 | ||
3588 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3589 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3590 | BFD_ASSERT (sdyn != NULL); | |
3591 | ||
3592 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
3593 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
3594 | sdyn->_raw_size); | |
3595 | for (; dyncon < dynconend; dyncon++) | |
3596 | { | |
3597 | Elf_Internal_Dyn dyn; | |
3598 | ||
3599 | elf_swap_dyn_in (dynobj, dyncon, & dyn); | |
3600 | switch (dyn.d_tag) | |
3601 | { | |
3602 | case DT_STRSZ: | |
3603 | dyn.d_un.d_val = size; | |
3604 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3605 | break; | |
3606 | case DT_NEEDED: | |
3607 | case DT_SONAME: | |
3608 | case DT_RPATH: | |
3609 | case DT_RUNPATH: | |
3610 | case DT_FILTER: | |
3611 | case DT_AUXILIARY: | |
3612 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); | |
3613 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3614 | break; | |
3615 | default: | |
3616 | break; | |
3617 | } | |
3618 | } | |
3619 | ||
3620 | /* Now update local dynamic symbols. */ | |
3621 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
3622 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3623 | entry->isym.st_name); | |
3624 | ||
3625 | /* And the rest of dynamic symbols. */ | |
3626 | elf_link_hash_traverse (elf_hash_table (info), | |
3627 | elf_adjust_dynstr_offsets, dynstr); | |
3628 | ||
3629 | /* Adjust version definitions. */ | |
3630 | if (elf_tdata (output_bfd)->cverdefs) | |
3631 | { | |
3632 | asection *s; | |
3633 | bfd_byte *p; | |
3634 | bfd_size_type i; | |
3635 | Elf_Internal_Verdef def; | |
3636 | Elf_Internal_Verdaux defaux; | |
c44233aa | 3637 | |
2b0f7ef9 JJ |
3638 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); |
3639 | p = (bfd_byte *) s->contents; | |
3640 | do | |
3641 | { | |
3642 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3643 | &def); | |
3644 | p += sizeof (Elf_External_Verdef); | |
3645 | for (i = 0; i < def.vd_cnt; ++i) | |
3646 | { | |
3647 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3648 | (Elf_External_Verdaux *) p, &defaux); | |
3649 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3650 | defaux.vda_name); | |
3651 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3652 | &defaux, (Elf_External_Verdaux *) p); | |
3653 | p += sizeof (Elf_External_Verdaux); | |
3654 | } | |
3655 | } | |
3656 | while (def.vd_next); | |
3657 | } | |
3658 | ||
3659 | /* Adjust version references. */ | |
3660 | if (elf_tdata (output_bfd)->verref) | |
3661 | { | |
3662 | asection *s; | |
3663 | bfd_byte *p; | |
3664 | bfd_size_type i; | |
3665 | Elf_Internal_Verneed need; | |
3666 | Elf_Internal_Vernaux needaux; | |
c44233aa | 3667 | |
2b0f7ef9 JJ |
3668 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); |
3669 | p = (bfd_byte *) s->contents; | |
3670 | do | |
3671 | { | |
3672 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3673 | &need); | |
3674 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3675 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3676 | (Elf_External_Verneed *) p); | |
3677 | p += sizeof (Elf_External_Verneed); | |
3678 | for (i = 0; i < need.vn_cnt; ++i) | |
3679 | { | |
3680 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3681 | (Elf_External_Vernaux *) p, &needaux); | |
3682 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3683 | needaux.vna_name); | |
3684 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3685 | &needaux, | |
3686 | (Elf_External_Vernaux *) p); | |
3687 | p += sizeof (Elf_External_Vernaux); | |
3688 | } | |
3689 | } | |
3690 | while (need.vn_next); | |
3691 | } | |
3692 | ||
3693 | return true; | |
3694 | } | |
3695 | ||
252b5132 RH |
3696 | /* Fix up the flags for a symbol. This handles various cases which |
3697 | can only be fixed after all the input files are seen. This is | |
3698 | currently called by both adjust_dynamic_symbol and | |
3699 | assign_sym_version, which is unnecessary but perhaps more robust in | |
3700 | the face of future changes. */ | |
3701 | ||
3702 | static boolean | |
3703 | elf_fix_symbol_flags (h, eif) | |
3704 | struct elf_link_hash_entry *h; | |
3705 | struct elf_info_failed *eif; | |
3706 | { | |
3707 | /* If this symbol was mentioned in a non-ELF file, try to set | |
3708 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
3709 | permit a non-ELF file to correctly refer to a symbol defined in | |
3710 | an ELF dynamic object. */ | |
3711 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0) | |
3712 | { | |
94b6c40a L |
3713 | while (h->root.type == bfd_link_hash_indirect) |
3714 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3715 | ||
252b5132 RH |
3716 | if (h->root.type != bfd_link_hash_defined |
3717 | && h->root.type != bfd_link_hash_defweak) | |
3718 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3719 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3720 | else | |
3721 | { | |
3722 | if (h->root.u.def.section->owner != NULL | |
3723 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
3724 | == bfd_target_elf_flavour)) | |
3725 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3726 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3727 | else | |
3728 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3729 | } | |
3730 | ||
3731 | if (h->dynindx == -1 | |
3732 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3733 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
3734 | { | |
3735 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
3736 | { | |
3737 | eif->failed = true; | |
3738 | return false; | |
3739 | } | |
3740 | } | |
3741 | } | |
3742 | else | |
3743 | { | |
3744 | /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol | |
c44233aa AM |
3745 | was first seen in a non-ELF file. Fortunately, if the symbol |
3746 | was first seen in an ELF file, we're probably OK unless the | |
3747 | symbol was defined in a non-ELF file. Catch that case here. | |
3748 | FIXME: We're still in trouble if the symbol was first seen in | |
3749 | a dynamic object, and then later in a non-ELF regular object. */ | |
252b5132 RH |
3750 | if ((h->root.type == bfd_link_hash_defined |
3751 | || h->root.type == bfd_link_hash_defweak) | |
3752 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3753 | && (h->root.u.def.section->owner != NULL | |
3754 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
3755 | != bfd_target_elf_flavour) | |
3756 | : (bfd_is_abs_section (h->root.u.def.section) | |
3757 | && (h->elf_link_hash_flags | |
3758 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0))) | |
3759 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3760 | } | |
3761 | ||
3762 | /* If this is a final link, and the symbol was defined as a common | |
3763 | symbol in a regular object file, and there was no definition in | |
3764 | any dynamic object, then the linker will have allocated space for | |
3765 | the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR | |
3766 | flag will not have been set. */ | |
3767 | if (h->root.type == bfd_link_hash_defined | |
3768 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3769 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 | |
3770 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
3771 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
3772 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3773 | ||
3774 | /* If -Bsymbolic was used (which means to bind references to global | |
3775 | symbols to the definition within the shared object), and this | |
3776 | symbol was defined in a regular object, then it actually doesn't | |
d954b040 HPN |
3777 | need a PLT entry, and we can accomplish that by forcing it local. |
3778 | Likewise, if the symbol has hidden or internal visibility. | |
3779 | FIXME: It might be that we also do not need a PLT for other | |
3780 | non-hidden visibilities, but we would have to tell that to the | |
3781 | backend specifically; we can't just clear PLT-related data here. */ | |
252b5132 RH |
3782 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 |
3783 | && eif->info->shared | |
8ea2e4bd | 3784 | && is_elf_hash_table (eif->info) |
d954b040 HPN |
3785 | && (eif->info->symbolic |
3786 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3787 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
252b5132 RH |
3788 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
3789 | { | |
391a809a | 3790 | struct elf_backend_data *bed; |
e5094212 | 3791 | boolean force_local; |
8ea2e4bd | 3792 | |
391a809a | 3793 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
e5094212 AM |
3794 | |
3795 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3796 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
3797 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
252b5132 RH |
3798 | } |
3799 | ||
fc4cc5bb ILT |
3800 | /* If this is a weak defined symbol in a dynamic object, and we know |
3801 | the real definition in the dynamic object, copy interesting flags | |
3802 | over to the real definition. */ | |
3803 | if (h->weakdef != NULL) | |
3804 | { | |
3805 | struct elf_link_hash_entry *weakdef; | |
3806 | ||
3807 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
3808 | || h->root.type == bfd_link_hash_defweak); | |
3809 | weakdef = h->weakdef; | |
3810 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined | |
3811 | || weakdef->root.type == bfd_link_hash_defweak); | |
3812 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
3813 | ||
3814 | /* If the real definition is defined by a regular object file, | |
3815 | don't do anything special. See the longer description in | |
3816 | elf_adjust_dynamic_symbol, below. */ | |
3817 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
3818 | h->weakdef = NULL; | |
3819 | else | |
0a991dfe AM |
3820 | { |
3821 | struct elf_backend_data *bed; | |
3822 | ||
3823 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); | |
3824 | (*bed->elf_backend_copy_indirect_symbol) (weakdef, h); | |
3825 | } | |
fc4cc5bb ILT |
3826 | } |
3827 | ||
252b5132 RH |
3828 | return true; |
3829 | } | |
3830 | ||
3831 | /* Make the backend pick a good value for a dynamic symbol. This is | |
3832 | called via elf_link_hash_traverse, and also calls itself | |
3833 | recursively. */ | |
3834 | ||
3835 | static boolean | |
3836 | elf_adjust_dynamic_symbol (h, data) | |
3837 | struct elf_link_hash_entry *h; | |
3838 | PTR data; | |
3839 | { | |
3840 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
3841 | bfd *dynobj; | |
3842 | struct elf_backend_data *bed; | |
3843 | ||
e92d460e AM |
3844 | if (h->root.type == bfd_link_hash_warning) |
3845 | { | |
3846 | h->plt.offset = (bfd_vma) -1; | |
3847 | h->got.offset = (bfd_vma) -1; | |
3848 | ||
3849 | /* When warning symbols are created, they **replace** the "real" | |
3850 | entry in the hash table, thus we never get to see the real | |
3851 | symbol in a hash traversal. So look at it now. */ | |
3852 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3853 | } | |
3854 | ||
252b5132 RH |
3855 | /* Ignore indirect symbols. These are added by the versioning code. */ |
3856 | if (h->root.type == bfd_link_hash_indirect) | |
3857 | return true; | |
3858 | ||
8ea2e4bd NC |
3859 | if (! is_elf_hash_table (eif->info)) |
3860 | return false; | |
3861 | ||
252b5132 RH |
3862 | /* Fix the symbol flags. */ |
3863 | if (! elf_fix_symbol_flags (h, eif)) | |
3864 | return false; | |
3865 | ||
3866 | /* If this symbol does not require a PLT entry, and it is not | |
3867 | defined by a dynamic object, or is not referenced by a regular | |
3868 | object, ignore it. We do have to handle a weak defined symbol, | |
3869 | even if no regular object refers to it, if we decided to add it | |
3870 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
3871 | about symbols which are defined by one dynamic object and | |
3872 | referenced by another one? */ | |
3873 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0 | |
3874 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
3875 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
3876 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 | |
3877 | && (h->weakdef == NULL || h->weakdef->dynindx == -1)))) | |
3878 | { | |
3879 | h->plt.offset = (bfd_vma) -1; | |
3880 | return true; | |
3881 | } | |
3882 | ||
3883 | /* If we've already adjusted this symbol, don't do it again. This | |
3884 | can happen via a recursive call. */ | |
3885 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
3886 | return true; | |
3887 | ||
3888 | /* Don't look at this symbol again. Note that we must set this | |
3889 | after checking the above conditions, because we may look at a | |
3890 | symbol once, decide not to do anything, and then get called | |
3891 | recursively later after REF_REGULAR is set below. */ | |
3892 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
3893 | ||
3894 | /* If this is a weak definition, and we know a real definition, and | |
3895 | the real symbol is not itself defined by a regular object file, | |
3896 | then get a good value for the real definition. We handle the | |
3897 | real symbol first, for the convenience of the backend routine. | |
3898 | ||
3899 | Note that there is a confusing case here. If the real definition | |
3900 | is defined by a regular object file, we don't get the real symbol | |
3901 | from the dynamic object, but we do get the weak symbol. If the | |
3902 | processor backend uses a COPY reloc, then if some routine in the | |
3903 | dynamic object changes the real symbol, we will not see that | |
3904 | change in the corresponding weak symbol. This is the way other | |
3905 | ELF linkers work as well, and seems to be a result of the shared | |
3906 | library model. | |
3907 | ||
3908 | I will clarify this issue. Most SVR4 shared libraries define the | |
3909 | variable _timezone and define timezone as a weak synonym. The | |
3910 | tzset call changes _timezone. If you write | |
3911 | extern int timezone; | |
3912 | int _timezone = 5; | |
3913 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
3914 | you might expect that, since timezone is a synonym for _timezone, | |
3915 | the same number will print both times. However, if the processor | |
3916 | backend uses a COPY reloc, then actually timezone will be copied | |
3917 | into your process image, and, since you define _timezone | |
3918 | yourself, _timezone will not. Thus timezone and _timezone will | |
3919 | wind up at different memory locations. The tzset call will set | |
3920 | _timezone, leaving timezone unchanged. */ | |
3921 | ||
3922 | if (h->weakdef != NULL) | |
3923 | { | |
fc4cc5bb ILT |
3924 | /* If we get to this point, we know there is an implicit |
3925 | reference by a regular object file via the weak symbol H. | |
3926 | FIXME: Is this really true? What if the traversal finds | |
3927 | H->WEAKDEF before it finds H? */ | |
3928 | h->weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
252b5132 | 3929 | |
fc4cc5bb ILT |
3930 | if (! elf_adjust_dynamic_symbol (h->weakdef, (PTR) eif)) |
3931 | return false; | |
252b5132 RH |
3932 | } |
3933 | ||
3934 | /* If a symbol has no type and no size and does not require a PLT | |
3935 | entry, then we are probably about to do the wrong thing here: we | |
3936 | are probably going to create a COPY reloc for an empty object. | |
3937 | This case can arise when a shared object is built with assembly | |
3938 | code, and the assembly code fails to set the symbol type. */ | |
3939 | if (h->size == 0 | |
3940 | && h->type == STT_NOTYPE | |
3941 | && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
3942 | (*_bfd_error_handler) | |
3943 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
58821868 | 3944 | h->root.root.string); |
252b5132 RH |
3945 | |
3946 | dynobj = elf_hash_table (eif->info)->dynobj; | |
3947 | bed = get_elf_backend_data (dynobj); | |
3948 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) | |
3949 | { | |
3950 | eif->failed = true; | |
3951 | return false; | |
3952 | } | |
3953 | ||
3954 | return true; | |
3955 | } | |
3956 | \f | |
3957 | /* This routine is used to export all defined symbols into the dynamic | |
3958 | symbol table. It is called via elf_link_hash_traverse. */ | |
3959 | ||
3960 | static boolean | |
3961 | elf_export_symbol (h, data) | |
3962 | struct elf_link_hash_entry *h; | |
3963 | PTR data; | |
3964 | { | |
3965 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
3966 | ||
3967 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
3968 | if (h->root.type == bfd_link_hash_indirect) | |
3969 | return true; | |
3970 | ||
e92d460e AM |
3971 | if (h->root.type == bfd_link_hash_warning) |
3972 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3973 | ||
252b5132 RH |
3974 | if (h->dynindx == -1 |
3975 | && (h->elf_link_hash_flags | |
3976 | & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
3977 | { | |
bc2b6df7 L |
3978 | struct bfd_elf_version_tree *t; |
3979 | struct bfd_elf_version_expr *d; | |
3980 | ||
3981 | for (t = eif->verdefs; t != NULL; t = t->next) | |
252b5132 | 3982 | { |
bc2b6df7 L |
3983 | if (t->globals != NULL) |
3984 | { | |
3985 | for (d = t->globals; d != NULL; d = d->next) | |
3986 | { | |
3987 | if ((*d->match) (d, h->root.root.string)) | |
3988 | goto doit; | |
3989 | } | |
3990 | } | |
3991 | ||
3992 | if (t->locals != NULL) | |
3993 | { | |
3994 | for (d = t->locals ; d != NULL; d = d->next) | |
3995 | { | |
3996 | if ((*d->match) (d, h->root.root.string)) | |
3997 | return true; | |
3998 | } | |
3999 | } | |
252b5132 | 4000 | } |
bc2b6df7 L |
4001 | |
4002 | if (!eif->verdefs) | |
c44233aa | 4003 | { |
58821868 | 4004 | doit: |
bc2b6df7 L |
4005 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
4006 | { | |
4007 | eif->failed = true; | |
4008 | return false; | |
4009 | } | |
c44233aa | 4010 | } |
252b5132 RH |
4011 | } |
4012 | ||
4013 | return true; | |
4014 | } | |
4015 | \f | |
4016 | /* Look through the symbols which are defined in other shared | |
4017 | libraries and referenced here. Update the list of version | |
4018 | dependencies. This will be put into the .gnu.version_r section. | |
4019 | This function is called via elf_link_hash_traverse. */ | |
4020 | ||
4021 | static boolean | |
4022 | elf_link_find_version_dependencies (h, data) | |
4023 | struct elf_link_hash_entry *h; | |
4024 | PTR data; | |
4025 | { | |
4026 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; | |
4027 | Elf_Internal_Verneed *t; | |
4028 | Elf_Internal_Vernaux *a; | |
dc810e39 | 4029 | bfd_size_type amt; |
252b5132 | 4030 | |
e92d460e AM |
4031 | if (h->root.type == bfd_link_hash_warning) |
4032 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4033 | ||
252b5132 RH |
4034 | /* We only care about symbols defined in shared objects with version |
4035 | information. */ | |
4036 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4037 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4038 | || h->dynindx == -1 | |
4039 | || h->verinfo.verdef == NULL) | |
4040 | return true; | |
4041 | ||
4042 | /* See if we already know about this version. */ | |
4043 | for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref) | |
4044 | { | |
4045 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
4046 | continue; | |
4047 | ||
4048 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
4049 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
4050 | return true; | |
4051 | ||
4052 | break; | |
4053 | } | |
4054 | ||
4055 | /* This is a new version. Add it to tree we are building. */ | |
4056 | ||
4057 | if (t == NULL) | |
4058 | { | |
dc810e39 AM |
4059 | amt = sizeof *t; |
4060 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4061 | if (t == NULL) |
4062 | { | |
4063 | rinfo->failed = true; | |
4064 | return false; | |
4065 | } | |
4066 | ||
4067 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
4068 | t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref; | |
4069 | elf_tdata (rinfo->output_bfd)->verref = t; | |
4070 | } | |
4071 | ||
dc810e39 AM |
4072 | amt = sizeof *a; |
4073 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4074 | |
4075 | /* Note that we are copying a string pointer here, and testing it | |
4076 | above. If bfd_elf_string_from_elf_section is ever changed to | |
4077 | discard the string data when low in memory, this will have to be | |
4078 | fixed. */ | |
4079 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
4080 | ||
4081 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
4082 | a->vna_nextptr = t->vn_auxptr; | |
4083 | ||
4084 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
4085 | ++rinfo->vers; | |
4086 | ||
4087 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
4088 | ||
4089 | t->vn_auxptr = a; | |
4090 | ||
4091 | return true; | |
4092 | } | |
4093 | ||
4094 | /* Figure out appropriate versions for all the symbols. We may not | |
4095 | have the version number script until we have read all of the input | |
4096 | files, so until that point we don't know which symbols should be | |
4097 | local. This function is called via elf_link_hash_traverse. */ | |
4098 | ||
4099 | static boolean | |
4100 | elf_link_assign_sym_version (h, data) | |
4101 | struct elf_link_hash_entry *h; | |
4102 | PTR data; | |
4103 | { | |
dc810e39 AM |
4104 | struct elf_assign_sym_version_info *sinfo; |
4105 | struct bfd_link_info *info; | |
c61b8717 | 4106 | struct elf_backend_data *bed; |
252b5132 RH |
4107 | struct elf_info_failed eif; |
4108 | char *p; | |
dc810e39 AM |
4109 | bfd_size_type amt; |
4110 | ||
4111 | sinfo = (struct elf_assign_sym_version_info *) data; | |
4112 | info = sinfo->info; | |
252b5132 | 4113 | |
e92d460e AM |
4114 | if (h->root.type == bfd_link_hash_warning) |
4115 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4116 | ||
252b5132 RH |
4117 | /* Fix the symbol flags. */ |
4118 | eif.failed = false; | |
4119 | eif.info = info; | |
4120 | if (! elf_fix_symbol_flags (h, &eif)) | |
4121 | { | |
4122 | if (eif.failed) | |
4123 | sinfo->failed = true; | |
4124 | return false; | |
4125 | } | |
4126 | ||
4127 | /* We only need version numbers for symbols defined in regular | |
4128 | objects. */ | |
4129 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
4130 | return true; | |
4131 | ||
c61b8717 | 4132 | bed = get_elf_backend_data (sinfo->output_bfd); |
252b5132 RH |
4133 | p = strchr (h->root.root.string, ELF_VER_CHR); |
4134 | if (p != NULL && h->verinfo.vertree == NULL) | |
4135 | { | |
4136 | struct bfd_elf_version_tree *t; | |
4137 | boolean hidden; | |
4138 | ||
4139 | hidden = true; | |
4140 | ||
4141 | /* There are two consecutive ELF_VER_CHR characters if this is | |
c44233aa | 4142 | not a hidden symbol. */ |
252b5132 RH |
4143 | ++p; |
4144 | if (*p == ELF_VER_CHR) | |
4145 | { | |
4146 | hidden = false; | |
4147 | ++p; | |
4148 | } | |
4149 | ||
4150 | /* If there is no version string, we can just return out. */ | |
4151 | if (*p == '\0') | |
4152 | { | |
4153 | if (hidden) | |
4154 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
4155 | return true; | |
4156 | } | |
4157 | ||
4158 | /* Look for the version. If we find it, it is no longer weak. */ | |
4159 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
4160 | { | |
4161 | if (strcmp (t->name, p) == 0) | |
4162 | { | |
dc810e39 | 4163 | size_t len; |
252b5132 RH |
4164 | char *alc; |
4165 | struct bfd_elf_version_expr *d; | |
4166 | ||
4167 | len = p - h->root.root.string; | |
e5094212 | 4168 | alc = bfd_malloc ((bfd_size_type) len); |
252b5132 | 4169 | if (alc == NULL) |
c44233aa | 4170 | return false; |
d4c88bbb | 4171 | memcpy (alc, h->root.root.string, len - 1); |
252b5132 RH |
4172 | alc[len - 1] = '\0'; |
4173 | if (alc[len - 2] == ELF_VER_CHR) | |
c44233aa | 4174 | alc[len - 2] = '\0'; |
252b5132 RH |
4175 | |
4176 | h->verinfo.vertree = t; | |
4177 | t->used = true; | |
4178 | d = NULL; | |
4179 | ||
4180 | if (t->globals != NULL) | |
4181 | { | |
4182 | for (d = t->globals; d != NULL; d = d->next) | |
4183 | if ((*d->match) (d, alc)) | |
4184 | break; | |
4185 | } | |
4186 | ||
4187 | /* See if there is anything to force this symbol to | |
c44233aa | 4188 | local scope. */ |
252b5132 RH |
4189 | if (d == NULL && t->locals != NULL) |
4190 | { | |
4191 | for (d = t->locals; d != NULL; d = d->next) | |
4192 | { | |
4193 | if ((*d->match) (d, alc)) | |
4194 | { | |
4195 | if (h->dynindx != -1 | |
4196 | && info->shared | |
99293407 | 4197 | && ! info->export_dynamic) |
252b5132 | 4198 | { |
e5094212 | 4199 | (*bed->elf_backend_hide_symbol) (info, h, true); |
252b5132 RH |
4200 | } |
4201 | ||
4202 | break; | |
4203 | } | |
4204 | } | |
4205 | } | |
4206 | ||
e5094212 | 4207 | free (alc); |
252b5132 RH |
4208 | break; |
4209 | } | |
4210 | } | |
4211 | ||
4212 | /* If we are building an application, we need to create a | |
c44233aa | 4213 | version node for this version. */ |
252b5132 RH |
4214 | if (t == NULL && ! info->shared) |
4215 | { | |
4216 | struct bfd_elf_version_tree **pp; | |
4217 | int version_index; | |
4218 | ||
4219 | /* If we aren't going to export this symbol, we don't need | |
c44233aa | 4220 | to worry about it. */ |
252b5132 RH |
4221 | if (h->dynindx == -1) |
4222 | return true; | |
4223 | ||
dc810e39 | 4224 | amt = sizeof *t; |
252b5132 | 4225 | t = ((struct bfd_elf_version_tree *) |
dc810e39 | 4226 | bfd_alloc (sinfo->output_bfd, amt)); |
252b5132 RH |
4227 | if (t == NULL) |
4228 | { | |
4229 | sinfo->failed = true; | |
4230 | return false; | |
4231 | } | |
4232 | ||
4233 | t->next = NULL; | |
4234 | t->name = p; | |
4235 | t->globals = NULL; | |
4236 | t->locals = NULL; | |
4237 | t->deps = NULL; | |
4238 | t->name_indx = (unsigned int) -1; | |
4239 | t->used = true; | |
4240 | ||
4241 | version_index = 1; | |
6b9b879a JJ |
4242 | /* Don't count anonymous version tag. */ |
4243 | if (sinfo->verdefs != NULL && sinfo->verdefs->vernum == 0) | |
4244 | version_index = 0; | |
252b5132 RH |
4245 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) |
4246 | ++version_index; | |
4247 | t->vernum = version_index; | |
4248 | ||
4249 | *pp = t; | |
4250 | ||
4251 | h->verinfo.vertree = t; | |
4252 | } | |
4253 | else if (t == NULL) | |
4254 | { | |
4255 | /* We could not find the version for a symbol when | |
c44233aa | 4256 | generating a shared archive. Return an error. */ |
252b5132 RH |
4257 | (*_bfd_error_handler) |
4258 | (_("%s: undefined versioned symbol name %s"), | |
4259 | bfd_get_filename (sinfo->output_bfd), h->root.root.string); | |
4260 | bfd_set_error (bfd_error_bad_value); | |
58821868 | 4261 | error_return: |
252b5132 RH |
4262 | sinfo->failed = true; |
4263 | return false; | |
4264 | } | |
4265 | ||
4266 | if (hidden) | |
4267 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
4268 | } | |
4269 | ||
4270 | /* If we don't have a version for this symbol, see if we can find | |
4271 | something. */ | |
4272 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
4273 | { | |
4274 | struct bfd_elf_version_tree *t; | |
58821868 | 4275 | struct bfd_elf_version_tree *local_ver; |
252b5132 RH |
4276 | struct bfd_elf_version_expr *d; |
4277 | ||
4278 | /* See if can find what version this symbol is in. If the | |
c44233aa AM |
4279 | symbol is supposed to be local, then don't actually register |
4280 | it. */ | |
58821868 | 4281 | local_ver = NULL; |
252b5132 RH |
4282 | for (t = sinfo->verdefs; t != NULL; t = t->next) |
4283 | { | |
4284 | if (t->globals != NULL) | |
4285 | { | |
4286 | for (d = t->globals; d != NULL; d = d->next) | |
4287 | { | |
4288 | if ((*d->match) (d, h->root.root.string)) | |
4289 | { | |
4290 | h->verinfo.vertree = t; | |
58821868 | 4291 | local_ver = NULL; |
252b5132 RH |
4292 | break; |
4293 | } | |
4294 | } | |
4295 | ||
4296 | if (d != NULL) | |
4297 | break; | |
4298 | } | |
4299 | ||
4300 | if (t->locals != NULL) | |
4301 | { | |
4302 | for (d = t->locals; d != NULL; d = d->next) | |
4303 | { | |
58821868 AM |
4304 | /* If the match is "*", keep looking for a more |
4305 | explicit, perhaps even global, match. */ | |
252b5132 | 4306 | if (d->pattern[0] == '*' && d->pattern[1] == '\0') |
58821868 | 4307 | local_ver = t; |
252b5132 RH |
4308 | else if ((*d->match) (d, h->root.root.string)) |
4309 | { | |
58821868 | 4310 | local_ver = t; |
252b5132 RH |
4311 | break; |
4312 | } | |
4313 | } | |
4314 | ||
4315 | if (d != NULL) | |
4316 | break; | |
4317 | } | |
4318 | } | |
4319 | ||
58821868 | 4320 | if (local_ver != NULL) |
252b5132 | 4321 | { |
58821868 | 4322 | h->verinfo.vertree = local_ver; |
252b5132 RH |
4323 | if (h->dynindx != -1 |
4324 | && info->shared | |
99293407 | 4325 | && ! info->export_dynamic) |
252b5132 | 4326 | { |
e5094212 | 4327 | (*bed->elf_backend_hide_symbol) (info, h, true); |
252b5132 RH |
4328 | } |
4329 | } | |
96a94295 L |
4330 | |
4331 | /* We need to check if a hidden versioned definition should | |
4332 | hide the default one. */ | |
4333 | if (h->dynindx != -1 && h->verinfo.vertree != NULL) | |
4334 | { | |
4335 | const char *verstr, *name; | |
4336 | size_t namelen, verlen, newlen; | |
4337 | char *newname; | |
4338 | struct elf_link_hash_entry *newh; | |
4339 | ||
4340 | name = h->root.root.string; | |
4341 | namelen = strlen (name); | |
4342 | verstr = h->verinfo.vertree->name; | |
4343 | verlen = strlen (verstr); | |
4344 | newlen = namelen + verlen + 2; | |
4345 | ||
4346 | newname = (char *) bfd_malloc ((bfd_size_type) newlen); | |
4347 | if (newname == NULL) | |
4348 | goto error_return; | |
4349 | memcpy (newname, name, namelen); | |
4350 | ||
4351 | /* Check the hidden versioned definition. */ | |
4352 | p = newname + namelen; | |
4353 | *p++ = ELF_VER_CHR; | |
4354 | memcpy (p, verstr, verlen + 1); | |
4355 | newh = elf_link_hash_lookup (elf_hash_table (info), newname, | |
58821868 | 4356 | false, false, false); |
96a94295 L |
4357 | |
4358 | if (newh | |
4359 | && (newh->root.type == bfd_link_hash_defined | |
4360 | || newh->root.type == bfd_link_hash_defweak)) | |
58821868 AM |
4361 | /* We found a hidden versioned definition. Hide the |
4362 | default one. */ | |
96a94295 L |
4363 | (*bed->elf_backend_hide_symbol) (info, h, true); |
4364 | ||
4365 | free (newname); | |
4366 | } | |
252b5132 RH |
4367 | } |
4368 | ||
4369 | return true; | |
4370 | } | |
252b5132 RH |
4371 | \f |
4372 | /* Final phase of ELF linker. */ | |
4373 | ||
4374 | /* A structure we use to avoid passing large numbers of arguments. */ | |
4375 | ||
4376 | struct elf_final_link_info | |
4377 | { | |
4378 | /* General link information. */ | |
4379 | struct bfd_link_info *info; | |
4380 | /* Output BFD. */ | |
4381 | bfd *output_bfd; | |
4382 | /* Symbol string table. */ | |
4383 | struct bfd_strtab_hash *symstrtab; | |
4384 | /* .dynsym section. */ | |
4385 | asection *dynsym_sec; | |
4386 | /* .hash section. */ | |
4387 | asection *hash_sec; | |
4388 | /* symbol version section (.gnu.version). */ | |
4389 | asection *symver_sec; | |
13ae64f3 JJ |
4390 | /* first SHF_TLS section (if any). */ |
4391 | asection *first_tls_sec; | |
252b5132 RH |
4392 | /* Buffer large enough to hold contents of any section. */ |
4393 | bfd_byte *contents; | |
4394 | /* Buffer large enough to hold external relocs of any section. */ | |
4395 | PTR external_relocs; | |
4396 | /* Buffer large enough to hold internal relocs of any section. */ | |
4397 | Elf_Internal_Rela *internal_relocs; | |
4398 | /* Buffer large enough to hold external local symbols of any input | |
4399 | BFD. */ | |
4400 | Elf_External_Sym *external_syms; | |
9ad5cbcf AM |
4401 | /* And a buffer for symbol section indices. */ |
4402 | Elf_External_Sym_Shndx *locsym_shndx; | |
252b5132 RH |
4403 | /* Buffer large enough to hold internal local symbols of any input |
4404 | BFD. */ | |
4405 | Elf_Internal_Sym *internal_syms; | |
4406 | /* Array large enough to hold a symbol index for each local symbol | |
4407 | of any input BFD. */ | |
4408 | long *indices; | |
4409 | /* Array large enough to hold a section pointer for each local | |
4410 | symbol of any input BFD. */ | |
4411 | asection **sections; | |
4412 | /* Buffer to hold swapped out symbols. */ | |
4413 | Elf_External_Sym *symbuf; | |
9ad5cbcf AM |
4414 | /* And one for symbol section indices. */ |
4415 | Elf_External_Sym_Shndx *symshndxbuf; | |
252b5132 RH |
4416 | /* Number of swapped out symbols in buffer. */ |
4417 | size_t symbuf_count; | |
4418 | /* Number of symbols which fit in symbuf. */ | |
4419 | size_t symbuf_size; | |
4420 | }; | |
4421 | ||
4422 | static boolean elf_link_output_sym | |
4423 | PARAMS ((struct elf_final_link_info *, const char *, | |
4424 | Elf_Internal_Sym *, asection *)); | |
4425 | static boolean elf_link_flush_output_syms | |
4426 | PARAMS ((struct elf_final_link_info *)); | |
4427 | static boolean elf_link_output_extsym | |
4428 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
f5fa8ca2 JJ |
4429 | static boolean elf_link_sec_merge_syms |
4430 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
f5d44ba0 AM |
4431 | static boolean elf_link_check_versioned_symbol |
4432 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
252b5132 RH |
4433 | static boolean elf_link_input_bfd |
4434 | PARAMS ((struct elf_final_link_info *, bfd *)); | |
4435 | static boolean elf_reloc_link_order | |
4436 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
4437 | struct bfd_link_order *)); | |
4438 | ||
4439 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
4440 | ||
4441 | struct elf_outext_info | |
4442 | { | |
4443 | boolean failed; | |
4444 | boolean localsyms; | |
4445 | struct elf_final_link_info *finfo; | |
4446 | }; | |
4447 | ||
23bc299b MM |
4448 | /* Compute the size of, and allocate space for, REL_HDR which is the |
4449 | section header for a section containing relocations for O. */ | |
4450 | ||
4451 | static boolean | |
4452 | elf_link_size_reloc_section (abfd, rel_hdr, o) | |
4453 | bfd *abfd; | |
4454 | Elf_Internal_Shdr *rel_hdr; | |
4455 | asection *o; | |
4456 | { | |
dc810e39 AM |
4457 | bfd_size_type reloc_count; |
4458 | bfd_size_type num_rel_hashes; | |
23bc299b | 4459 | |
b037af20 MM |
4460 | /* Figure out how many relocations there will be. */ |
4461 | if (rel_hdr == &elf_section_data (o)->rel_hdr) | |
4462 | reloc_count = elf_section_data (o)->rel_count; | |
4463 | else | |
4464 | reloc_count = elf_section_data (o)->rel_count2; | |
4465 | ||
9317eacc CM |
4466 | num_rel_hashes = o->reloc_count; |
4467 | if (num_rel_hashes < reloc_count) | |
4468 | num_rel_hashes = reloc_count; | |
dc810e39 | 4469 | |
b037af20 MM |
4470 | /* That allows us to calculate the size of the section. */ |
4471 | rel_hdr->sh_size = rel_hdr->sh_entsize * reloc_count; | |
23bc299b MM |
4472 | |
4473 | /* The contents field must last into write_object_contents, so we | |
755cfd29 NC |
4474 | allocate it with bfd_alloc rather than malloc. Also since we |
4475 | cannot be sure that the contents will actually be filled in, | |
4476 | we zero the allocated space. */ | |
4477 | rel_hdr->contents = (PTR) bfd_zalloc (abfd, rel_hdr->sh_size); | |
23bc299b MM |
4478 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
4479 | return false; | |
3e932841 | 4480 | |
b037af20 MM |
4481 | /* We only allocate one set of hash entries, so we only do it the |
4482 | first time we are called. */ | |
9317eacc CM |
4483 | if (elf_section_data (o)->rel_hashes == NULL |
4484 | && num_rel_hashes) | |
b037af20 | 4485 | { |
209f668e NC |
4486 | struct elf_link_hash_entry **p; |
4487 | ||
b037af20 | 4488 | p = ((struct elf_link_hash_entry **) |
9317eacc | 4489 | bfd_zmalloc (num_rel_hashes |
209f668e | 4490 | * sizeof (struct elf_link_hash_entry *))); |
9317eacc | 4491 | if (p == NULL) |
b037af20 | 4492 | return false; |
23bc299b | 4493 | |
b037af20 | 4494 | elf_section_data (o)->rel_hashes = p; |
b037af20 | 4495 | } |
23bc299b MM |
4496 | |
4497 | return true; | |
4498 | } | |
4499 | ||
31367b81 MM |
4500 | /* When performing a relocateable link, the input relocations are |
4501 | preserved. But, if they reference global symbols, the indices | |
4502 | referenced must be updated. Update all the relocations in | |
4503 | REL_HDR (there are COUNT of them), using the data in REL_HASH. */ | |
4504 | ||
4505 | static void | |
4506 | elf_link_adjust_relocs (abfd, rel_hdr, count, rel_hash) | |
4507 | bfd *abfd; | |
4508 | Elf_Internal_Shdr *rel_hdr; | |
4509 | unsigned int count; | |
4510 | struct elf_link_hash_entry **rel_hash; | |
4511 | { | |
4512 | unsigned int i; | |
32f0787a | 4513 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
209f668e NC |
4514 | Elf_Internal_Rel *irel; |
4515 | Elf_Internal_Rela *irela; | |
dc810e39 | 4516 | bfd_size_type amt = sizeof (Elf_Internal_Rel) * bed->s->int_rels_per_ext_rel; |
209f668e | 4517 | |
dc810e39 | 4518 | irel = (Elf_Internal_Rel *) bfd_zmalloc (amt); |
209f668e NC |
4519 | if (irel == NULL) |
4520 | { | |
4521 | (*_bfd_error_handler) (_("Error: out of memory")); | |
4522 | abort (); | |
4523 | } | |
4524 | ||
dc810e39 AM |
4525 | amt = sizeof (Elf_Internal_Rela) * bed->s->int_rels_per_ext_rel; |
4526 | irela = (Elf_Internal_Rela *) bfd_zmalloc (amt); | |
209f668e NC |
4527 | if (irela == NULL) |
4528 | { | |
4529 | (*_bfd_error_handler) (_("Error: out of memory")); | |
4530 | abort (); | |
4531 | } | |
31367b81 MM |
4532 | |
4533 | for (i = 0; i < count; i++, rel_hash++) | |
4534 | { | |
4535 | if (*rel_hash == NULL) | |
4536 | continue; | |
4537 | ||
4538 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
4539 | ||
4540 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) | |
4541 | { | |
4542 | Elf_External_Rel *erel; | |
209f668e | 4543 | unsigned int j; |
3e932841 | 4544 | |
31367b81 | 4545 | erel = (Elf_External_Rel *) rel_hdr->contents + i; |
32f0787a | 4546 | if (bed->s->swap_reloc_in) |
209f668e | 4547 | (*bed->s->swap_reloc_in) (abfd, (bfd_byte *) erel, irel); |
32f0787a | 4548 | else |
209f668e NC |
4549 | elf_swap_reloc_in (abfd, erel, irel); |
4550 | ||
4551 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
4552 | irel[j].r_info = ELF_R_INFO ((*rel_hash)->indx, | |
4553 | ELF_R_TYPE (irel[j].r_info)); | |
4554 | ||
32f0787a | 4555 | if (bed->s->swap_reloc_out) |
209f668e | 4556 | (*bed->s->swap_reloc_out) (abfd, irel, (bfd_byte *) erel); |
32f0787a | 4557 | else |
209f668e | 4558 | elf_swap_reloc_out (abfd, irel, erel); |
31367b81 MM |
4559 | } |
4560 | else | |
4561 | { | |
4562 | Elf_External_Rela *erela; | |
209f668e | 4563 | unsigned int j; |
3e932841 | 4564 | |
31367b81 MM |
4565 | BFD_ASSERT (rel_hdr->sh_entsize |
4566 | == sizeof (Elf_External_Rela)); | |
3e932841 | 4567 | |
31367b81 | 4568 | erela = (Elf_External_Rela *) rel_hdr->contents + i; |
32f0787a | 4569 | if (bed->s->swap_reloca_in) |
209f668e | 4570 | (*bed->s->swap_reloca_in) (abfd, (bfd_byte *) erela, irela); |
32f0787a | 4571 | else |
209f668e NC |
4572 | elf_swap_reloca_in (abfd, erela, irela); |
4573 | ||
4574 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
4575 | irela[j].r_info = ELF_R_INFO ((*rel_hash)->indx, | |
58821868 | 4576 | ELF_R_TYPE (irela[j].r_info)); |
209f668e | 4577 | |
32f0787a | 4578 | if (bed->s->swap_reloca_out) |
209f668e | 4579 | (*bed->s->swap_reloca_out) (abfd, irela, (bfd_byte *) erela); |
32f0787a | 4580 | else |
209f668e | 4581 | elf_swap_reloca_out (abfd, irela, erela); |
31367b81 MM |
4582 | } |
4583 | } | |
209f668e NC |
4584 | |
4585 | free (irel); | |
4586 | free (irela); | |
31367b81 MM |
4587 | } |
4588 | ||
58821868 AM |
4589 | struct elf_link_sort_rela |
4590 | { | |
db6751f2 JJ |
4591 | bfd_vma offset; |
4592 | enum elf_reloc_type_class type; | |
58821868 AM |
4593 | union |
4594 | { | |
db6751f2 JJ |
4595 | Elf_Internal_Rel rel; |
4596 | Elf_Internal_Rela rela; | |
4597 | } u; | |
4598 | }; | |
4599 | ||
4600 | static int | |
4601 | elf_link_sort_cmp1 (A, B) | |
4602 | const PTR A; | |
4603 | const PTR B; | |
4604 | { | |
f51e552e AM |
4605 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4606 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4607 | int relativea, relativeb; |
4608 | ||
4609 | relativea = a->type == reloc_class_relative; | |
4610 | relativeb = b->type == reloc_class_relative; | |
4611 | ||
4612 | if (relativea < relativeb) | |
db6751f2 | 4613 | return 1; |
fcfbdf31 JJ |
4614 | if (relativea > relativeb) |
4615 | return -1; | |
db6751f2 JJ |
4616 | if (ELF_R_SYM (a->u.rel.r_info) < ELF_R_SYM (b->u.rel.r_info)) |
4617 | return -1; | |
4618 | if (ELF_R_SYM (a->u.rel.r_info) > ELF_R_SYM (b->u.rel.r_info)) | |
4619 | return 1; | |
4620 | if (a->u.rel.r_offset < b->u.rel.r_offset) | |
4621 | return -1; | |
4622 | if (a->u.rel.r_offset > b->u.rel.r_offset) | |
4623 | return 1; | |
4624 | return 0; | |
4625 | } | |
4626 | ||
4627 | static int | |
4628 | elf_link_sort_cmp2 (A, B) | |
4629 | const PTR A; | |
4630 | const PTR B; | |
4631 | { | |
f51e552e AM |
4632 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4633 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4634 | int copya, copyb; |
4635 | ||
4636 | if (a->offset < b->offset) | |
4637 | return -1; | |
4638 | if (a->offset > b->offset) | |
4639 | return 1; | |
290394d6 JJ |
4640 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); |
4641 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
db6751f2 JJ |
4642 | if (copya < copyb) |
4643 | return -1; | |
4644 | if (copya > copyb) | |
4645 | return 1; | |
4646 | if (a->u.rel.r_offset < b->u.rel.r_offset) | |
4647 | return -1; | |
4648 | if (a->u.rel.r_offset > b->u.rel.r_offset) | |
4649 | return 1; | |
4650 | return 0; | |
4651 | } | |
4652 | ||
4653 | static size_t | |
4654 | elf_link_sort_relocs (abfd, info, psec) | |
4655 | bfd *abfd; | |
4656 | struct bfd_link_info *info; | |
4657 | asection **psec; | |
4658 | { | |
4659 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
4660 | asection *reldyn, *o; | |
4661 | boolean rel = false; | |
f51e552e AM |
4662 | bfd_size_type count, size; |
4663 | size_t i, j, ret; | |
db6751f2 JJ |
4664 | struct elf_link_sort_rela *rela; |
4665 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4666 | ||
4667 | reldyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
4668 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4669 | { | |
4670 | reldyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
4671 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4672 | return 0; | |
4673 | rel = true; | |
4674 | count = reldyn->_raw_size / sizeof (Elf_External_Rel); | |
4675 | } | |
4676 | else | |
4677 | count = reldyn->_raw_size / sizeof (Elf_External_Rela); | |
4678 | ||
4679 | size = 0; | |
4680 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4681 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4682 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4683 | && o->output_section == reldyn) | |
4684 | size += o->_raw_size; | |
4685 | ||
4686 | if (size != reldyn->_raw_size) | |
4687 | return 0; | |
4688 | ||
f51e552e | 4689 | rela = (struct elf_link_sort_rela *) bfd_zmalloc (sizeof (*rela) * count); |
db6751f2 JJ |
4690 | if (rela == NULL) |
4691 | { | |
4692 | (*info->callbacks->warning) | |
dc810e39 AM |
4693 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, |
4694 | (bfd_vma) 0); | |
db6751f2 JJ |
4695 | return 0; |
4696 | } | |
4697 | ||
4698 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4699 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4700 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4701 | && o->output_section == reldyn) | |
4702 | { | |
4703 | if (rel) | |
4704 | { | |
4705 | Elf_External_Rel *erel, *erelend; | |
4706 | struct elf_link_sort_rela *s; | |
4707 | ||
4708 | erel = (Elf_External_Rel *) o->contents; | |
f51e552e | 4709 | erelend = (Elf_External_Rel *) (o->contents + o->_raw_size); |
db6751f2 JJ |
4710 | s = rela + o->output_offset / sizeof (Elf_External_Rel); |
4711 | for (; erel < erelend; erel++, s++) | |
4712 | { | |
4713 | if (bed->s->swap_reloc_in) | |
4714 | (*bed->s->swap_reloc_in) (abfd, (bfd_byte *) erel, &s->u.rel); | |
4715 | else | |
4716 | elf_swap_reloc_in (abfd, erel, &s->u.rel); | |
4717 | ||
f51e552e | 4718 | s->type = (*bed->elf_backend_reloc_type_class) (&s->u.rela); |
dc810e39 | 4719 | } |
db6751f2 JJ |
4720 | } |
4721 | else | |
4722 | { | |
4723 | Elf_External_Rela *erela, *erelaend; | |
4724 | struct elf_link_sort_rela *s; | |
4725 | ||
4726 | erela = (Elf_External_Rela *) o->contents; | |
f51e552e | 4727 | erelaend = (Elf_External_Rela *) (o->contents + o->_raw_size); |
db6751f2 JJ |
4728 | s = rela + o->output_offset / sizeof (Elf_External_Rela); |
4729 | for (; erela < erelaend; erela++, s++) | |
4730 | { | |
4731 | if (bed->s->swap_reloca_in) | |
dc810e39 AM |
4732 | (*bed->s->swap_reloca_in) (dynobj, (bfd_byte *) erela, |
4733 | &s->u.rela); | |
db6751f2 JJ |
4734 | else |
4735 | elf_swap_reloca_in (dynobj, erela, &s->u.rela); | |
4736 | ||
f51e552e | 4737 | s->type = (*bed->elf_backend_reloc_type_class) (&s->u.rela); |
dc810e39 | 4738 | } |
db6751f2 JJ |
4739 | } |
4740 | } | |
4741 | ||
973ffd63 | 4742 | qsort (rela, (size_t) count, sizeof (*rela), elf_link_sort_cmp1); |
fcfbdf31 JJ |
4743 | for (ret = 0; ret < count && rela[ret].type == reloc_class_relative; ret++) |
4744 | ; | |
4745 | for (i = ret, j = ret; i < count; i++) | |
db6751f2 JJ |
4746 | { |
4747 | if (ELF_R_SYM (rela[i].u.rel.r_info) != ELF_R_SYM (rela[j].u.rel.r_info)) | |
4748 | j = i; | |
4749 | rela[i].offset = rela[j].u.rel.r_offset; | |
4750 | } | |
973ffd63 | 4751 | qsort (rela + ret, (size_t) count - ret, sizeof (*rela), elf_link_sort_cmp2); |
dc810e39 | 4752 | |
db6751f2 JJ |
4753 | for (o = dynobj->sections; o != NULL; o = o->next) |
4754 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4755 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4756 | && o->output_section == reldyn) | |
4757 | { | |
4758 | if (rel) | |
4759 | { | |
4760 | Elf_External_Rel *erel, *erelend; | |
4761 | struct elf_link_sort_rela *s; | |
4762 | ||
4763 | erel = (Elf_External_Rel *) o->contents; | |
df22989b | 4764 | erelend = (Elf_External_Rel *) (o->contents + o->_raw_size); |
db6751f2 JJ |
4765 | s = rela + o->output_offset / sizeof (Elf_External_Rel); |
4766 | for (; erel < erelend; erel++, s++) | |
4767 | { | |
4768 | if (bed->s->swap_reloc_out) | |
dc810e39 AM |
4769 | (*bed->s->swap_reloc_out) (abfd, &s->u.rel, |
4770 | (bfd_byte *) erel); | |
db6751f2 JJ |
4771 | else |
4772 | elf_swap_reloc_out (abfd, &s->u.rel, erel); | |
4773 | } | |
4774 | } | |
4775 | else | |
4776 | { | |
4777 | Elf_External_Rela *erela, *erelaend; | |
4778 | struct elf_link_sort_rela *s; | |
4779 | ||
4780 | erela = (Elf_External_Rela *) o->contents; | |
df22989b | 4781 | erelaend = (Elf_External_Rela *) (o->contents + o->_raw_size); |
db6751f2 JJ |
4782 | s = rela + o->output_offset / sizeof (Elf_External_Rela); |
4783 | for (; erela < erelaend; erela++, s++) | |
4784 | { | |
4785 | if (bed->s->swap_reloca_out) | |
dc810e39 AM |
4786 | (*bed->s->swap_reloca_out) (dynobj, &s->u.rela, |
4787 | (bfd_byte *) erela); | |
db6751f2 JJ |
4788 | else |
4789 | elf_swap_reloca_out (dynobj, &s->u.rela, erela); | |
dc810e39 | 4790 | } |
db6751f2 JJ |
4791 | } |
4792 | } | |
4793 | ||
4794 | free (rela); | |
4795 | *psec = reldyn; | |
4796 | return ret; | |
4797 | } | |
4798 | ||
252b5132 RH |
4799 | /* Do the final step of an ELF link. */ |
4800 | ||
4801 | boolean | |
4802 | elf_bfd_final_link (abfd, info) | |
4803 | bfd *abfd; | |
4804 | struct bfd_link_info *info; | |
4805 | { | |
4806 | boolean dynamic; | |
9317eacc | 4807 | boolean emit_relocs; |
252b5132 RH |
4808 | bfd *dynobj; |
4809 | struct elf_final_link_info finfo; | |
4810 | register asection *o; | |
4811 | register struct bfd_link_order *p; | |
4812 | register bfd *sub; | |
dc810e39 AM |
4813 | bfd_size_type max_contents_size; |
4814 | bfd_size_type max_external_reloc_size; | |
4815 | bfd_size_type max_internal_reloc_count; | |
4816 | bfd_size_type max_sym_count; | |
9ad5cbcf | 4817 | bfd_size_type max_sym_shndx_count; |
252b5132 RH |
4818 | file_ptr off; |
4819 | Elf_Internal_Sym elfsym; | |
4820 | unsigned int i; | |
4821 | Elf_Internal_Shdr *symtab_hdr; | |
4822 | Elf_Internal_Shdr *symstrtab_hdr; | |
4823 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4824 | struct elf_outext_info eoinfo; | |
f5fa8ca2 | 4825 | boolean merged; |
db6751f2 JJ |
4826 | size_t relativecount = 0; |
4827 | asection *reldyn = 0; | |
dc810e39 | 4828 | bfd_size_type amt; |
252b5132 | 4829 | |
8ea2e4bd NC |
4830 | if (! is_elf_hash_table (info)) |
4831 | return false; | |
4832 | ||
252b5132 RH |
4833 | if (info->shared) |
4834 | abfd->flags |= DYNAMIC; | |
4835 | ||
4836 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
4837 | dynobj = elf_hash_table (info)->dynobj; | |
4838 | ||
9317eacc | 4839 | emit_relocs = (info->relocateable |
c44233aa AM |
4840 | || info->emitrelocations |
4841 | || bed->elf_backend_emit_relocs); | |
9317eacc | 4842 | |
252b5132 RH |
4843 | finfo.info = info; |
4844 | finfo.output_bfd = abfd; | |
4845 | finfo.symstrtab = elf_stringtab_init (); | |
4846 | if (finfo.symstrtab == NULL) | |
4847 | return false; | |
4848 | ||
4849 | if (! dynamic) | |
4850 | { | |
4851 | finfo.dynsym_sec = NULL; | |
4852 | finfo.hash_sec = NULL; | |
4853 | finfo.symver_sec = NULL; | |
4854 | } | |
4855 | else | |
4856 | { | |
4857 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4858 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
4859 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
4860 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
4861 | /* Note that it is OK if symver_sec is NULL. */ | |
4862 | } | |
4863 | ||
4864 | finfo.contents = NULL; | |
4865 | finfo.external_relocs = NULL; | |
4866 | finfo.internal_relocs = NULL; | |
4867 | finfo.external_syms = NULL; | |
9ad5cbcf | 4868 | finfo.locsym_shndx = NULL; |
252b5132 RH |
4869 | finfo.internal_syms = NULL; |
4870 | finfo.indices = NULL; | |
4871 | finfo.sections = NULL; | |
4872 | finfo.symbuf = NULL; | |
9ad5cbcf | 4873 | finfo.symshndxbuf = NULL; |
252b5132 | 4874 | finfo.symbuf_count = 0; |
13ae64f3 JJ |
4875 | finfo.first_tls_sec = NULL; |
4876 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
4877 | if ((o->flags & SEC_THREAD_LOCAL) != 0 | |
4878 | && (o->flags & SEC_LOAD) != 0) | |
4879 | { | |
4880 | finfo.first_tls_sec = o; | |
4881 | break; | |
4882 | } | |
252b5132 RH |
4883 | |
4884 | /* Count up the number of relocations we will output for each output | |
4885 | section, so that we know the sizes of the reloc sections. We | |
4886 | also figure out some maximum sizes. */ | |
4887 | max_contents_size = 0; | |
4888 | max_external_reloc_size = 0; | |
4889 | max_internal_reloc_count = 0; | |
4890 | max_sym_count = 0; | |
9ad5cbcf | 4891 | max_sym_shndx_count = 0; |
f5fa8ca2 | 4892 | merged = false; |
252b5132 RH |
4893 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
4894 | { | |
4895 | o->reloc_count = 0; | |
4896 | ||
4897 | for (p = o->link_order_head; p != NULL; p = p->next) | |
4898 | { | |
4899 | if (p->type == bfd_section_reloc_link_order | |
4900 | || p->type == bfd_symbol_reloc_link_order) | |
4901 | ++o->reloc_count; | |
4902 | else if (p->type == bfd_indirect_link_order) | |
4903 | { | |
4904 | asection *sec; | |
4905 | ||
4906 | sec = p->u.indirect.section; | |
4907 | ||
4908 | /* Mark all sections which are to be included in the | |
4909 | link. This will normally be every section. We need | |
4910 | to do this so that we can identify any sections which | |
4911 | the linker has decided to not include. */ | |
4912 | sec->linker_mark = true; | |
4913 | ||
f5fa8ca2 JJ |
4914 | if (sec->flags & SEC_MERGE) |
4915 | merged = true; | |
4916 | ||
a712da20 | 4917 | if (info->relocateable || info->emitrelocations) |
252b5132 | 4918 | o->reloc_count += sec->reloc_count; |
c44233aa | 4919 | else if (bed->elf_backend_count_relocs) |
9317eacc CM |
4920 | { |
4921 | Elf_Internal_Rela * relocs; | |
4922 | ||
4923 | relocs = (NAME(_bfd_elf,link_read_relocs) | |
4924 | (abfd, sec, (PTR) NULL, | |
4925 | (Elf_Internal_Rela *) NULL, info->keep_memory)); | |
4926 | ||
c44233aa AM |
4927 | o->reloc_count |
4928 | += (*bed->elf_backend_count_relocs) (sec, relocs); | |
9317eacc | 4929 | |
6cdc0ccc | 4930 | if (elf_section_data (o)->relocs != relocs) |
9317eacc CM |
4931 | free (relocs); |
4932 | } | |
252b5132 RH |
4933 | |
4934 | if (sec->_raw_size > max_contents_size) | |
4935 | max_contents_size = sec->_raw_size; | |
4936 | if (sec->_cooked_size > max_contents_size) | |
4937 | max_contents_size = sec->_cooked_size; | |
4938 | ||
4939 | /* We are interested in just local symbols, not all | |
4940 | symbols. */ | |
4941 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
4942 | && (sec->owner->flags & DYNAMIC) == 0) | |
4943 | { | |
4944 | size_t sym_count; | |
4945 | ||
4946 | if (elf_bad_symtab (sec->owner)) | |
4947 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
4948 | / sizeof (Elf_External_Sym)); | |
4949 | else | |
4950 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
4951 | ||
4952 | if (sym_count > max_sym_count) | |
4953 | max_sym_count = sym_count; | |
4954 | ||
9ad5cbcf AM |
4955 | if (sym_count > max_sym_shndx_count |
4956 | && elf_symtab_shndx (sec->owner) != 0) | |
4957 | max_sym_shndx_count = sym_count; | |
4958 | ||
252b5132 RH |
4959 | if ((sec->flags & SEC_RELOC) != 0) |
4960 | { | |
4961 | size_t ext_size; | |
4962 | ||
4963 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
4964 | if (ext_size > max_external_reloc_size) | |
4965 | max_external_reloc_size = ext_size; | |
4966 | if (sec->reloc_count > max_internal_reloc_count) | |
4967 | max_internal_reloc_count = sec->reloc_count; | |
4968 | } | |
4969 | } | |
4970 | } | |
4971 | } | |
4972 | ||
4973 | if (o->reloc_count > 0) | |
4974 | o->flags |= SEC_RELOC; | |
4975 | else | |
4976 | { | |
4977 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
4978 | set it (this is probably a bug) and if it is set | |
4979 | assign_section_numbers will create a reloc section. */ | |
4980 | o->flags &=~ SEC_RELOC; | |
4981 | } | |
4982 | ||
4983 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
4984 | zero. This is done in elf_fake_sections as well, but forcing | |
4985 | the VMA to 0 here will ensure that relocs against these | |
4986 | sections are handled correctly. */ | |
4987 | if ((o->flags & SEC_ALLOC) == 0 | |
4988 | && ! o->user_set_vma) | |
4989 | o->vma = 0; | |
4990 | } | |
4991 | ||
f5fa8ca2 JJ |
4992 | if (! info->relocateable && merged) |
4993 | elf_link_hash_traverse (elf_hash_table (info), | |
4994 | elf_link_sec_merge_syms, (PTR) abfd); | |
4995 | ||
252b5132 RH |
4996 | /* Figure out the file positions for everything but the symbol table |
4997 | and the relocs. We set symcount to force assign_section_numbers | |
4998 | to create a symbol table. */ | |
4999 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
5000 | BFD_ASSERT (! abfd->output_has_begun); | |
5001 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
5002 | goto error_return; | |
5003 | ||
b037af20 MM |
5004 | /* Figure out how many relocations we will have in each section. |
5005 | Just using RELOC_COUNT isn't good enough since that doesn't | |
5006 | maintain a separate value for REL vs. RELA relocations. */ | |
9317eacc | 5007 | if (emit_relocs) |
b037af20 MM |
5008 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
5009 | for (o = sub->sections; o != NULL; o = o->next) | |
5010 | { | |
814fe68a | 5011 | asection *output_section; |
b037af20 | 5012 | |
814fe68a ILT |
5013 | if (! o->linker_mark) |
5014 | { | |
5015 | /* This section was omitted from the link. */ | |
5016 | continue; | |
5017 | } | |
5018 | ||
5019 | output_section = o->output_section; | |
5020 | ||
5021 | if (output_section != NULL | |
5022 | && (o->flags & SEC_RELOC) != 0) | |
b037af20 | 5023 | { |
3e932841 | 5024 | struct bfd_elf_section_data *esdi |
b037af20 | 5025 | = elf_section_data (o); |
3e932841 | 5026 | struct bfd_elf_section_data *esdo |
b037af20 | 5027 | = elf_section_data (output_section); |
ce006217 MM |
5028 | unsigned int *rel_count; |
5029 | unsigned int *rel_count2; | |
c119f9b8 AM |
5030 | bfd_size_type entsize; |
5031 | bfd_size_type entsize2; | |
b037af20 | 5032 | |
c119f9b8 | 5033 | /* We must be careful to add the relocations from the |
ce006217 | 5034 | input section to the right output count. */ |
c119f9b8 AM |
5035 | entsize = esdi->rel_hdr.sh_entsize; |
5036 | entsize2 = esdi->rel_hdr2 ? esdi->rel_hdr2->sh_entsize : 0; | |
5037 | BFD_ASSERT ((entsize == sizeof (Elf_External_Rel) | |
5038 | || entsize == sizeof (Elf_External_Rela)) | |
5039 | && entsize2 != entsize | |
5040 | && (entsize2 == 0 | |
5041 | || entsize2 == sizeof (Elf_External_Rel) | |
5042 | || entsize2 == sizeof (Elf_External_Rela))); | |
5043 | if (entsize == esdo->rel_hdr.sh_entsize) | |
ce006217 MM |
5044 | { |
5045 | rel_count = &esdo->rel_count; | |
5046 | rel_count2 = &esdo->rel_count2; | |
5047 | } | |
5048 | else | |
5049 | { | |
5050 | rel_count = &esdo->rel_count2; | |
5051 | rel_count2 = &esdo->rel_count; | |
5052 | } | |
3e932841 | 5053 | |
d9bc7a44 | 5054 | *rel_count += NUM_SHDR_ENTRIES (& esdi->rel_hdr); |
b037af20 | 5055 | if (esdi->rel_hdr2) |
d9bc7a44 | 5056 | *rel_count2 += NUM_SHDR_ENTRIES (esdi->rel_hdr2); |
9317eacc | 5057 | output_section->flags |= SEC_RELOC; |
b037af20 MM |
5058 | } |
5059 | } | |
5060 | ||
252b5132 RH |
5061 | /* That created the reloc sections. Set their sizes, and assign |
5062 | them file positions, and allocate some buffers. */ | |
5063 | for (o = abfd->sections; o != NULL; o = o->next) | |
5064 | { | |
5065 | if ((o->flags & SEC_RELOC) != 0) | |
5066 | { | |
23bc299b MM |
5067 | if (!elf_link_size_reloc_section (abfd, |
5068 | &elf_section_data (o)->rel_hdr, | |
5069 | o)) | |
252b5132 RH |
5070 | goto error_return; |
5071 | ||
23bc299b MM |
5072 | if (elf_section_data (o)->rel_hdr2 |
5073 | && !elf_link_size_reloc_section (abfd, | |
5074 | elf_section_data (o)->rel_hdr2, | |
5075 | o)) | |
252b5132 | 5076 | goto error_return; |
252b5132 | 5077 | } |
b037af20 MM |
5078 | |
5079 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
3e932841 | 5080 | to count upwards while actually outputting the relocations. */ |
b037af20 MM |
5081 | elf_section_data (o)->rel_count = 0; |
5082 | elf_section_data (o)->rel_count2 = 0; | |
252b5132 RH |
5083 | } |
5084 | ||
5085 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
5086 | ||
5087 | /* We have now assigned file positions for all the sections except | |
5088 | .symtab and .strtab. We start the .symtab section at the current | |
5089 | file position, and write directly to it. We build the .strtab | |
5090 | section in memory. */ | |
5091 | bfd_get_symcount (abfd) = 0; | |
5092 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5093 | /* sh_name is set in prep_headers. */ | |
5094 | symtab_hdr->sh_type = SHT_SYMTAB; | |
5095 | symtab_hdr->sh_flags = 0; | |
5096 | symtab_hdr->sh_addr = 0; | |
5097 | symtab_hdr->sh_size = 0; | |
5098 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); | |
5099 | /* sh_link is set in assign_section_numbers. */ | |
5100 | /* sh_info is set below. */ | |
5101 | /* sh_offset is set just below. */ | |
f0e1d18a | 5102 | symtab_hdr->sh_addralign = bed->s->file_align; |
252b5132 RH |
5103 | |
5104 | off = elf_tdata (abfd)->next_file_pos; | |
5105 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true); | |
5106 | ||
5107 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5108 | incorrect. We do not yet know the size of the .symtab section. | |
5109 | We correct next_file_pos below, after we do know the size. */ | |
5110 | ||
5111 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5112 | continuously seeking to the right position in the file. */ | |
5113 | if (! info->keep_memory || max_sym_count < 20) | |
5114 | finfo.symbuf_size = 20; | |
5115 | else | |
5116 | finfo.symbuf_size = max_sym_count; | |
dc810e39 AM |
5117 | amt = finfo.symbuf_size; |
5118 | amt *= sizeof (Elf_External_Sym); | |
5119 | finfo.symbuf = (Elf_External_Sym *) bfd_malloc (amt); | |
252b5132 RH |
5120 | if (finfo.symbuf == NULL) |
5121 | goto error_return; | |
9ad5cbcf AM |
5122 | if (elf_numsections (abfd) > SHN_LORESERVE) |
5123 | { | |
5124 | amt = finfo.symbuf_size; | |
5125 | amt *= sizeof (Elf_External_Sym_Shndx); | |
5126 | finfo.symshndxbuf = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
5127 | if (finfo.symshndxbuf == NULL) | |
5128 | goto error_return; | |
5129 | } | |
252b5132 RH |
5130 | |
5131 | /* Start writing out the symbol table. The first symbol is always a | |
5132 | dummy symbol. */ | |
9317eacc CM |
5133 | if (info->strip != strip_all |
5134 | || emit_relocs) | |
252b5132 RH |
5135 | { |
5136 | elfsym.st_value = 0; | |
5137 | elfsym.st_size = 0; | |
5138 | elfsym.st_info = 0; | |
5139 | elfsym.st_other = 0; | |
5140 | elfsym.st_shndx = SHN_UNDEF; | |
5141 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5142 | &elfsym, bfd_und_section_ptr)) | |
5143 | goto error_return; | |
5144 | } | |
5145 | ||
5146 | #if 0 | |
5147 | /* Some standard ELF linkers do this, but we don't because it causes | |
5148 | bootstrap comparison failures. */ | |
5149 | /* Output a file symbol for the output file as the second symbol. | |
5150 | We output this even if we are discarding local symbols, although | |
5151 | I'm not sure if this is correct. */ | |
5152 | elfsym.st_value = 0; | |
5153 | elfsym.st_size = 0; | |
5154 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5155 | elfsym.st_other = 0; | |
5156 | elfsym.st_shndx = SHN_ABS; | |
5157 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
5158 | &elfsym, bfd_abs_section_ptr)) | |
5159 | goto error_return; | |
5160 | #endif | |
5161 | ||
5162 | /* Output a symbol for each section. We output these even if we are | |
5163 | discarding local symbols, since they are used for relocs. These | |
5164 | symbols have no names. We store the index of each one in the | |
5165 | index field of the section, so that we can find it again when | |
5166 | outputting relocs. */ | |
9317eacc CM |
5167 | if (info->strip != strip_all |
5168 | || emit_relocs) | |
252b5132 RH |
5169 | { |
5170 | elfsym.st_size = 0; | |
5171 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5172 | elfsym.st_other = 0; | |
9ad5cbcf | 5173 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5174 | { |
5175 | o = section_from_elf_index (abfd, i); | |
5176 | if (o != NULL) | |
5177 | o->target_index = bfd_get_symcount (abfd); | |
5178 | elfsym.st_shndx = i; | |
7ad34365 | 5179 | if (info->relocateable || o == NULL) |
252b5132 RH |
5180 | elfsym.st_value = 0; |
5181 | else | |
5182 | elfsym.st_value = o->vma; | |
5183 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5184 | &elfsym, o)) | |
5185 | goto error_return; | |
9ad5cbcf AM |
5186 | if (i == SHN_LORESERVE) |
5187 | i += SHN_HIRESERVE + 1 - SHN_LORESERVE; | |
252b5132 RH |
5188 | } |
5189 | } | |
5190 | ||
5191 | /* Allocate some memory to hold information read in from the input | |
5192 | files. */ | |
9ad5cbcf AM |
5193 | if (max_contents_size != 0) |
5194 | { | |
5195 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
5196 | if (finfo.contents == NULL) | |
5197 | goto error_return; | |
5198 | } | |
5199 | ||
5200 | if (max_external_reloc_size != 0) | |
5201 | { | |
5202 | finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size); | |
5203 | if (finfo.external_relocs == NULL) | |
5204 | goto error_return; | |
5205 | } | |
5206 | ||
5207 | if (max_internal_reloc_count != 0) | |
5208 | { | |
5209 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
5210 | amt *= sizeof (Elf_Internal_Rela); | |
5211 | finfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); | |
5212 | if (finfo.internal_relocs == NULL) | |
5213 | goto error_return; | |
5214 | } | |
5215 | ||
5216 | if (max_sym_count != 0) | |
5217 | { | |
5218 | amt = max_sym_count * sizeof (Elf_External_Sym); | |
5219 | finfo.external_syms = (Elf_External_Sym *) bfd_malloc (amt); | |
5220 | if (finfo.external_syms == NULL) | |
5221 | goto error_return; | |
5222 | ||
5223 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
5224 | finfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); | |
5225 | if (finfo.internal_syms == NULL) | |
5226 | goto error_return; | |
5227 | ||
5228 | amt = max_sym_count * sizeof (long); | |
5229 | finfo.indices = (long *) bfd_malloc (amt); | |
5230 | if (finfo.indices == NULL) | |
5231 | goto error_return; | |
5232 | ||
5233 | amt = max_sym_count * sizeof (asection *); | |
5234 | finfo.sections = (asection **) bfd_malloc (amt); | |
5235 | if (finfo.sections == NULL) | |
5236 | goto error_return; | |
5237 | } | |
5238 | ||
5239 | if (max_sym_shndx_count != 0) | |
5240 | { | |
5241 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
5242 | finfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
5243 | if (finfo.locsym_shndx == NULL) | |
5244 | goto error_return; | |
5245 | } | |
252b5132 | 5246 | |
13ae64f3 JJ |
5247 | if (finfo.first_tls_sec) |
5248 | { | |
5249 | unsigned int align = 0; | |
5250 | bfd_vma base = finfo.first_tls_sec->vma, end = 0; | |
5251 | asection *sec; | |
5252 | ||
5253 | for (sec = finfo.first_tls_sec; | |
5254 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
5255 | sec = sec->next) | |
5256 | { | |
5257 | bfd_vma size = sec->_raw_size; | |
5258 | ||
5259 | if (bfd_get_section_alignment (abfd, sec) > align) | |
5260 | align = bfd_get_section_alignment (abfd, sec); | |
5261 | if (sec->_raw_size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
5262 | { | |
5263 | struct bfd_link_order *o; | |
5264 | ||
5265 | size = 0; | |
5266 | for (o = sec->link_order_head; o != NULL; o = o->next) | |
5267 | if (size < o->offset + o->size) | |
58821868 | 5268 | size = o->offset + o->size; |
13ae64f3 JJ |
5269 | } |
5270 | end = sec->vma + size; | |
5271 | } | |
5272 | elf_hash_table (info)->tls_segment | |
5273 | = bfd_zalloc (abfd, sizeof (struct elf_link_tls_segment)); | |
5274 | if (elf_hash_table (info)->tls_segment == NULL) | |
5275 | goto error_return; | |
5276 | elf_hash_table (info)->tls_segment->start = base; | |
5277 | elf_hash_table (info)->tls_segment->size = end - base; | |
5278 | elf_hash_table (info)->tls_segment->align = align; | |
5279 | } | |
5280 | ||
252b5132 RH |
5281 | /* Since ELF permits relocations to be against local symbols, we |
5282 | must have the local symbols available when we do the relocations. | |
5283 | Since we would rather only read the local symbols once, and we | |
5284 | would rather not keep them in memory, we handle all the | |
5285 | relocations for a single input file at the same time. | |
5286 | ||
5287 | Unfortunately, there is no way to know the total number of local | |
5288 | symbols until we have seen all of them, and the local symbol | |
5289 | indices precede the global symbol indices. This means that when | |
5290 | we are generating relocateable output, and we see a reloc against | |
5291 | a global symbol, we can not know the symbol index until we have | |
5292 | finished examining all the local symbols to see which ones we are | |
5293 | going to output. To deal with this, we keep the relocations in | |
5294 | memory, and don't output them until the end of the link. This is | |
5295 | an unfortunate waste of memory, but I don't see a good way around | |
5296 | it. Fortunately, it only happens when performing a relocateable | |
5297 | link, which is not the common case. FIXME: If keep_memory is set | |
5298 | we could write the relocs out and then read them again; I don't | |
5299 | know how bad the memory loss will be. */ | |
5300 | ||
5301 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
5302 | sub->output_has_begun = false; | |
5303 | for (o = abfd->sections; o != NULL; o = o->next) | |
5304 | { | |
5305 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5306 | { | |
5307 | if (p->type == bfd_indirect_link_order | |
a50c1845 | 5308 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) |
4ddafab0 | 5309 | == bfd_target_elf_flavour) |
a50c1845 | 5310 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) |
252b5132 | 5311 | { |
252b5132 RH |
5312 | if (! sub->output_has_begun) |
5313 | { | |
5314 | if (! elf_link_input_bfd (&finfo, sub)) | |
5315 | goto error_return; | |
5316 | sub->output_has_begun = true; | |
5317 | } | |
5318 | } | |
5319 | else if (p->type == bfd_section_reloc_link_order | |
5320 | || p->type == bfd_symbol_reloc_link_order) | |
5321 | { | |
5322 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5323 | goto error_return; | |
5324 | } | |
5325 | else | |
5326 | { | |
5327 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5328 | goto error_return; | |
5329 | } | |
5330 | } | |
5331 | } | |
5332 | ||
c44233aa AM |
5333 | /* Output any global symbols that got converted to local in a |
5334 | version script or due to symbol visibility. We do this in a | |
5335 | separate step since ELF requires all local symbols to appear | |
5336 | prior to any global symbols. FIXME: We should only do this if | |
5337 | some global symbols were, in fact, converted to become local. | |
5338 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
5339 | eoinfo.failed = false; | |
5340 | eoinfo.finfo = &finfo; | |
5341 | eoinfo.localsyms = true; | |
5342 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
5343 | (PTR) &eoinfo); | |
5344 | if (eoinfo.failed) | |
5345 | return false; | |
5346 | ||
252b5132 | 5347 | /* That wrote out all the local symbols. Finish up the symbol table |
5cc7c785 L |
5348 | with the global symbols. Even if we want to strip everything we |
5349 | can, we still need to deal with those global symbols that got | |
3e932841 | 5350 | converted to local in a version script. */ |
252b5132 | 5351 | |
30b30c21 | 5352 | /* The sh_info field records the index of the first non local symbol. */ |
252b5132 | 5353 | symtab_hdr->sh_info = bfd_get_symcount (abfd); |
30b30c21 | 5354 | |
fc8c40a0 AM |
5355 | if (dynamic |
5356 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
30b30c21 RH |
5357 | { |
5358 | Elf_Internal_Sym sym; | |
5359 | Elf_External_Sym *dynsym = | |
a7b97311 | 5360 | (Elf_External_Sym *) finfo.dynsym_sec->contents; |
71a40b32 | 5361 | long last_local = 0; |
30b30c21 RH |
5362 | |
5363 | /* Write out the section symbols for the output sections. */ | |
5364 | if (info->shared) | |
5365 | { | |
5366 | asection *s; | |
5367 | ||
5368 | sym.st_size = 0; | |
5369 | sym.st_name = 0; | |
5370 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5371 | sym.st_other = 0; | |
5372 | ||
5373 | for (s = abfd->sections; s != NULL; s = s->next) | |
5374 | { | |
5375 | int indx; | |
9ad5cbcf AM |
5376 | Elf_External_Sym *dest; |
5377 | ||
30b30c21 RH |
5378 | indx = elf_section_data (s)->this_idx; |
5379 | BFD_ASSERT (indx > 0); | |
5380 | sym.st_shndx = indx; | |
5381 | sym.st_value = s->vma; | |
9ad5cbcf AM |
5382 | dest = dynsym + elf_section_data (s)->dynindx; |
5383 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5384 | } |
5385 | ||
5386 | last_local = bfd_count_sections (abfd); | |
5387 | } | |
5388 | ||
5389 | /* Write out the local dynsyms. */ | |
5390 | if (elf_hash_table (info)->dynlocal) | |
5391 | { | |
5392 | struct elf_link_local_dynamic_entry *e; | |
5393 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
5394 | { | |
318da145 | 5395 | asection *s; |
9ad5cbcf | 5396 | Elf_External_Sym *dest; |
30b30c21 | 5397 | |
b037af20 MM |
5398 | sym.st_size = e->isym.st_size; |
5399 | sym.st_other = e->isym.st_other; | |
5400 | ||
1fa0ddb3 RH |
5401 | /* Copy the internal symbol as is. |
5402 | Note that we saved a word of storage and overwrote | |
c44233aa AM |
5403 | the original st_name with the dynstr_index. */ |
5404 | sym = e->isym; | |
30b30c21 | 5405 | |
c8e5ddc8 | 5406 | if (e->isym.st_shndx != SHN_UNDEF |
58821868 AM |
5407 | && (e->isym.st_shndx < SHN_LORESERVE |
5408 | || e->isym.st_shndx > SHN_HIRESERVE)) | |
587ff49e RH |
5409 | { |
5410 | s = bfd_section_from_elf_index (e->input_bfd, | |
5411 | e->isym.st_shndx); | |
5412 | ||
5413 | sym.st_shndx = | |
5414 | elf_section_data (s->output_section)->this_idx; | |
5415 | sym.st_value = (s->output_section->vma | |
5416 | + s->output_offset | |
5417 | + e->isym.st_value); | |
5418 | } | |
30b30c21 RH |
5419 | |
5420 | if (last_local < e->dynindx) | |
5421 | last_local = e->dynindx; | |
5422 | ||
9ad5cbcf AM |
5423 | dest = dynsym + e->dynindx; |
5424 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5425 | } |
5426 | } | |
5427 | ||
71a40b32 ILT |
5428 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = |
5429 | last_local + 1; | |
30b30c21 | 5430 | } |
252b5132 RH |
5431 | |
5432 | /* We get the global symbols from the hash table. */ | |
5433 | eoinfo.failed = false; | |
5434 | eoinfo.localsyms = false; | |
5435 | eoinfo.finfo = &finfo; | |
5436 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
5437 | (PTR) &eoinfo); | |
5438 | if (eoinfo.failed) | |
5439 | return false; | |
5440 | ||
587ff49e RH |
5441 | /* If backend needs to output some symbols not present in the hash |
5442 | table, do it now. */ | |
5443 | if (bed->elf_backend_output_arch_syms) | |
5444 | { | |
dc810e39 AM |
5445 | typedef boolean (*out_sym_func) PARAMS ((PTR, const char *, |
5446 | Elf_Internal_Sym *, | |
5447 | asection *)); | |
5448 | ||
5449 | if (! ((*bed->elf_backend_output_arch_syms) | |
5450 | (abfd, info, (PTR) &finfo, (out_sym_func) elf_link_output_sym))) | |
587ff49e | 5451 | return false; |
3e932841 | 5452 | } |
587ff49e | 5453 | |
252b5132 RH |
5454 | /* Flush all symbols to the file. */ |
5455 | if (! elf_link_flush_output_syms (&finfo)) | |
5456 | return false; | |
5457 | ||
5458 | /* Now we know the size of the symtab section. */ | |
5459 | off += symtab_hdr->sh_size; | |
5460 | ||
5461 | /* Finish up and write out the symbol string table (.strtab) | |
5462 | section. */ | |
5463 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5464 | /* sh_name was set in prep_headers. */ | |
5465 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5466 | symstrtab_hdr->sh_flags = 0; | |
5467 | symstrtab_hdr->sh_addr = 0; | |
5468 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
5469 | symstrtab_hdr->sh_entsize = 0; | |
5470 | symstrtab_hdr->sh_link = 0; | |
5471 | symstrtab_hdr->sh_info = 0; | |
5472 | /* sh_offset is set just below. */ | |
5473 | symstrtab_hdr->sh_addralign = 1; | |
5474 | ||
5475 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, true); | |
5476 | elf_tdata (abfd)->next_file_pos = off; | |
5477 | ||
5478 | if (bfd_get_symcount (abfd) > 0) | |
5479 | { | |
5480 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
5481 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
5482 | return false; | |
5483 | } | |
5484 | ||
5485 | /* Adjust the relocs to have the correct symbol indices. */ | |
5486 | for (o = abfd->sections; o != NULL; o = o->next) | |
5487 | { | |
252b5132 RH |
5488 | if ((o->flags & SEC_RELOC) == 0) |
5489 | continue; | |
5490 | ||
3e932841 | 5491 | elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr, |
31367b81 MM |
5492 | elf_section_data (o)->rel_count, |
5493 | elf_section_data (o)->rel_hashes); | |
5494 | if (elf_section_data (o)->rel_hdr2 != NULL) | |
5495 | elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2, | |
5496 | elf_section_data (o)->rel_count2, | |
3e932841 | 5497 | (elf_section_data (o)->rel_hashes |
31367b81 | 5498 | + elf_section_data (o)->rel_count)); |
252b5132 RH |
5499 | |
5500 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5501 | trying to swap the relocs out itself. */ | |
5502 | o->reloc_count = 0; | |
5503 | } | |
5504 | ||
db6751f2 JJ |
5505 | if (dynamic && info->combreloc && dynobj != NULL) |
5506 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
5507 | ||
252b5132 RH |
5508 | /* If we are linking against a dynamic object, or generating a |
5509 | shared library, finish up the dynamic linking information. */ | |
5510 | if (dynamic) | |
5511 | { | |
5512 | Elf_External_Dyn *dyncon, *dynconend; | |
5513 | ||
5514 | /* Fix up .dynamic entries. */ | |
5515 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5516 | BFD_ASSERT (o != NULL); | |
5517 | ||
5518 | dyncon = (Elf_External_Dyn *) o->contents; | |
5519 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5520 | for (; dyncon < dynconend; dyncon++) | |
5521 | { | |
5522 | Elf_Internal_Dyn dyn; | |
5523 | const char *name; | |
5524 | unsigned int type; | |
5525 | ||
5526 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5527 | ||
5528 | switch (dyn.d_tag) | |
5529 | { | |
5530 | default: | |
5531 | break; | |
db6751f2 JJ |
5532 | case DT_NULL: |
5533 | if (relativecount > 0 && dyncon + 1 < dynconend) | |
5534 | { | |
5535 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
5536 | { | |
5537 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
5538 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
5539 | default: break; | |
5540 | } | |
5541 | if (dyn.d_tag != DT_NULL) | |
5542 | { | |
5543 | dyn.d_un.d_val = relativecount; | |
5544 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5545 | relativecount = 0; | |
5546 | } | |
5547 | } | |
5548 | break; | |
252b5132 | 5549 | case DT_INIT: |
f0c2e336 | 5550 | name = info->init_function; |
252b5132 RH |
5551 | goto get_sym; |
5552 | case DT_FINI: | |
f0c2e336 | 5553 | name = info->fini_function; |
252b5132 RH |
5554 | get_sym: |
5555 | { | |
5556 | struct elf_link_hash_entry *h; | |
5557 | ||
5558 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
5559 | false, false, true); | |
5560 | if (h != NULL | |
5561 | && (h->root.type == bfd_link_hash_defined | |
5562 | || h->root.type == bfd_link_hash_defweak)) | |
5563 | { | |
5564 | dyn.d_un.d_val = h->root.u.def.value; | |
5565 | o = h->root.u.def.section; | |
5566 | if (o->output_section != NULL) | |
5567 | dyn.d_un.d_val += (o->output_section->vma | |
5568 | + o->output_offset); | |
5569 | else | |
5570 | { | |
5571 | /* The symbol is imported from another shared | |
5572 | library and does not apply to this one. */ | |
5573 | dyn.d_un.d_val = 0; | |
5574 | } | |
5575 | ||
5576 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5577 | } | |
5578 | } | |
5579 | break; | |
5580 | ||
30831527 RH |
5581 | case DT_PREINIT_ARRAYSZ: |
5582 | name = ".preinit_array"; | |
5583 | goto get_size; | |
5584 | case DT_INIT_ARRAYSZ: | |
5585 | name = ".init_array"; | |
5586 | goto get_size; | |
5587 | case DT_FINI_ARRAYSZ: | |
5588 | name = ".fini_array"; | |
5589 | get_size: | |
5590 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5591 | if (o == NULL) |
5592 | { | |
5593 | (*_bfd_error_handler) | |
5594 | (_("%s: could not find output section %s"), | |
5595 | bfd_get_filename (abfd), name); | |
5596 | goto error_return; | |
5597 | } | |
25e27870 L |
5598 | if (o->_raw_size == 0) |
5599 | (*_bfd_error_handler) | |
5600 | (_("warning: %s section has zero size"), name); | |
30831527 RH |
5601 | dyn.d_un.d_val = o->_raw_size; |
5602 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5603 | break; | |
5604 | ||
5605 | case DT_PREINIT_ARRAY: | |
5606 | name = ".preinit_array"; | |
5607 | goto get_vma; | |
5608 | case DT_INIT_ARRAY: | |
5609 | name = ".init_array"; | |
5610 | goto get_vma; | |
5611 | case DT_FINI_ARRAY: | |
5612 | name = ".fini_array"; | |
5613 | goto get_vma; | |
5614 | ||
252b5132 RH |
5615 | case DT_HASH: |
5616 | name = ".hash"; | |
5617 | goto get_vma; | |
5618 | case DT_STRTAB: | |
5619 | name = ".dynstr"; | |
5620 | goto get_vma; | |
5621 | case DT_SYMTAB: | |
5622 | name = ".dynsym"; | |
5623 | goto get_vma; | |
5624 | case DT_VERDEF: | |
5625 | name = ".gnu.version_d"; | |
5626 | goto get_vma; | |
5627 | case DT_VERNEED: | |
5628 | name = ".gnu.version_r"; | |
5629 | goto get_vma; | |
5630 | case DT_VERSYM: | |
5631 | name = ".gnu.version"; | |
5632 | get_vma: | |
5633 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5634 | if (o == NULL) |
5635 | { | |
5636 | (*_bfd_error_handler) | |
5637 | (_("%s: could not find output section %s"), | |
5638 | bfd_get_filename (abfd), name); | |
5639 | goto error_return; | |
5640 | } | |
252b5132 RH |
5641 | dyn.d_un.d_ptr = o->vma; |
5642 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5643 | break; | |
5644 | ||
5645 | case DT_REL: | |
5646 | case DT_RELA: | |
5647 | case DT_RELSZ: | |
5648 | case DT_RELASZ: | |
5649 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5650 | type = SHT_REL; | |
5651 | else | |
5652 | type = SHT_RELA; | |
5653 | dyn.d_un.d_val = 0; | |
9ad5cbcf | 5654 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5655 | { |
5656 | Elf_Internal_Shdr *hdr; | |
5657 | ||
5658 | hdr = elf_elfsections (abfd)[i]; | |
5659 | if (hdr->sh_type == type | |
5660 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5661 | { | |
5662 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5663 | dyn.d_un.d_val += hdr->sh_size; | |
5664 | else | |
5665 | { | |
5666 | if (dyn.d_un.d_val == 0 | |
5667 | || hdr->sh_addr < dyn.d_un.d_val) | |
5668 | dyn.d_un.d_val = hdr->sh_addr; | |
5669 | } | |
5670 | } | |
5671 | } | |
5672 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5673 | break; | |
5674 | } | |
5675 | } | |
5676 | } | |
5677 | ||
5678 | /* If we have created any dynamic sections, then output them. */ | |
5679 | if (dynobj != NULL) | |
5680 | { | |
5681 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
5682 | goto error_return; | |
5683 | ||
5684 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5685 | { | |
5686 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
fc8c40a0 AM |
5687 | || o->_raw_size == 0 |
5688 | || o->output_section == bfd_abs_section_ptr) | |
252b5132 RH |
5689 | continue; |
5690 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
5691 | { | |
5692 | /* At this point, we are only interested in sections | |
c44233aa | 5693 | created by elf_link_create_dynamic_sections. */ |
252b5132 RH |
5694 | continue; |
5695 | } | |
5696 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
5697 | != SHT_STRTAB) | |
5698 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
5699 | { | |
5700 | if (! bfd_set_section_contents (abfd, o->output_section, | |
dc810e39 AM |
5701 | o->contents, |
5702 | (file_ptr) o->output_offset, | |
252b5132 RH |
5703 | o->_raw_size)) |
5704 | goto error_return; | |
5705 | } | |
5706 | else | |
5707 | { | |
252b5132 | 5708 | /* The contents of the .dynstr section are actually in a |
c44233aa | 5709 | stringtab. */ |
252b5132 RH |
5710 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
5711 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
2b0f7ef9 JJ |
5712 | || ! _bfd_elf_strtab_emit (abfd, |
5713 | elf_hash_table (info)->dynstr)) | |
252b5132 RH |
5714 | goto error_return; |
5715 | } | |
5716 | } | |
5717 | } | |
5718 | ||
1126897b AM |
5719 | if (info->relocateable) |
5720 | { | |
5721 | boolean failed = false; | |
5722 | ||
5723 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
5724 | if (failed) | |
5725 | goto error_return; | |
5726 | } | |
5727 | ||
252b5132 RH |
5728 | /* If we have optimized stabs strings, output them. */ |
5729 | if (elf_hash_table (info)->stab_info != NULL) | |
5730 | { | |
5731 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
5732 | goto error_return; | |
5733 | } | |
5734 | ||
57a72197 | 5735 | if (info->eh_frame_hdr && elf_hash_table (info)->dynobj) |
65765700 JJ |
5736 | { |
5737 | o = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
5738 | ".eh_frame_hdr"); | |
5739 | if (o | |
5740 | && (elf_section_data (o)->sec_info_type | |
5741 | == ELF_INFO_TYPE_EH_FRAME_HDR)) | |
5742 | { | |
5743 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, o)) | |
5744 | goto error_return; | |
5745 | } | |
5746 | } | |
5747 | ||
252b5132 RH |
5748 | if (finfo.symstrtab != NULL) |
5749 | _bfd_stringtab_free (finfo.symstrtab); | |
5750 | if (finfo.contents != NULL) | |
5751 | free (finfo.contents); | |
5752 | if (finfo.external_relocs != NULL) | |
5753 | free (finfo.external_relocs); | |
5754 | if (finfo.internal_relocs != NULL) | |
5755 | free (finfo.internal_relocs); | |
5756 | if (finfo.external_syms != NULL) | |
5757 | free (finfo.external_syms); | |
9ad5cbcf AM |
5758 | if (finfo.locsym_shndx != NULL) |
5759 | free (finfo.locsym_shndx); | |
252b5132 RH |
5760 | if (finfo.internal_syms != NULL) |
5761 | free (finfo.internal_syms); | |
5762 | if (finfo.indices != NULL) | |
5763 | free (finfo.indices); | |
5764 | if (finfo.sections != NULL) | |
5765 | free (finfo.sections); | |
5766 | if (finfo.symbuf != NULL) | |
5767 | free (finfo.symbuf); | |
9ad5cbcf AM |
5768 | if (finfo.symshndxbuf != NULL) |
5769 | free (finfo.symbuf); | |
252b5132 RH |
5770 | for (o = abfd->sections; o != NULL; o = o->next) |
5771 | { | |
5772 | if ((o->flags & SEC_RELOC) != 0 | |
5773 | && elf_section_data (o)->rel_hashes != NULL) | |
c44233aa | 5774 | free (elf_section_data (o)->rel_hashes); |
252b5132 RH |
5775 | } |
5776 | ||
5777 | elf_tdata (abfd)->linker = true; | |
5778 | ||
5779 | return true; | |
5780 | ||
5781 | error_return: | |
5782 | if (finfo.symstrtab != NULL) | |
5783 | _bfd_stringtab_free (finfo.symstrtab); | |
5784 | if (finfo.contents != NULL) | |
5785 | free (finfo.contents); | |
5786 | if (finfo.external_relocs != NULL) | |
5787 | free (finfo.external_relocs); | |
5788 | if (finfo.internal_relocs != NULL) | |
5789 | free (finfo.internal_relocs); | |
5790 | if (finfo.external_syms != NULL) | |
5791 | free (finfo.external_syms); | |
9ad5cbcf AM |
5792 | if (finfo.locsym_shndx != NULL) |
5793 | free (finfo.locsym_shndx); | |
252b5132 RH |
5794 | if (finfo.internal_syms != NULL) |
5795 | free (finfo.internal_syms); | |
5796 | if (finfo.indices != NULL) | |
5797 | free (finfo.indices); | |
5798 | if (finfo.sections != NULL) | |
5799 | free (finfo.sections); | |
5800 | if (finfo.symbuf != NULL) | |
5801 | free (finfo.symbuf); | |
9ad5cbcf AM |
5802 | if (finfo.symshndxbuf != NULL) |
5803 | free (finfo.symbuf); | |
252b5132 RH |
5804 | for (o = abfd->sections; o != NULL; o = o->next) |
5805 | { | |
5806 | if ((o->flags & SEC_RELOC) != 0 | |
5807 | && elf_section_data (o)->rel_hashes != NULL) | |
5808 | free (elf_section_data (o)->rel_hashes); | |
5809 | } | |
5810 | ||
5811 | return false; | |
5812 | } | |
5813 | ||
5814 | /* Add a symbol to the output symbol table. */ | |
5815 | ||
5816 | static boolean | |
5817 | elf_link_output_sym (finfo, name, elfsym, input_sec) | |
5818 | struct elf_final_link_info *finfo; | |
5819 | const char *name; | |
5820 | Elf_Internal_Sym *elfsym; | |
5821 | asection *input_sec; | |
5822 | { | |
9ad5cbcf AM |
5823 | Elf_External_Sym *dest; |
5824 | Elf_External_Sym_Shndx *destshndx; | |
c44233aa | 5825 | |
252b5132 RH |
5826 | boolean (*output_symbol_hook) PARAMS ((bfd *, |
5827 | struct bfd_link_info *info, | |
5828 | const char *, | |
5829 | Elf_Internal_Sym *, | |
5830 | asection *)); | |
5831 | ||
5832 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
5833 | elf_backend_link_output_symbol_hook; | |
5834 | if (output_symbol_hook != NULL) | |
5835 | { | |
5836 | if (! ((*output_symbol_hook) | |
5837 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
5838 | return false; | |
5839 | } | |
5840 | ||
5841 | if (name == (const char *) NULL || *name == '\0') | |
5842 | elfsym->st_name = 0; | |
5843 | else if (input_sec->flags & SEC_EXCLUDE) | |
5844 | elfsym->st_name = 0; | |
5845 | else | |
5846 | { | |
5847 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
a7b97311 | 5848 | name, true, false); |
252b5132 RH |
5849 | if (elfsym->st_name == (unsigned long) -1) |
5850 | return false; | |
5851 | } | |
5852 | ||
5853 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5854 | { | |
5855 | if (! elf_link_flush_output_syms (finfo)) | |
5856 | return false; | |
5857 | } | |
5858 | ||
9ad5cbcf AM |
5859 | dest = finfo->symbuf + finfo->symbuf_count; |
5860 | destshndx = finfo->symshndxbuf; | |
5861 | if (destshndx != NULL) | |
5862 | destshndx += finfo->symbuf_count; | |
5863 | elf_swap_symbol_out (finfo->output_bfd, elfsym, (PTR) dest, (PTR) destshndx); | |
252b5132 RH |
5864 | ++finfo->symbuf_count; |
5865 | ||
5866 | ++ bfd_get_symcount (finfo->output_bfd); | |
5867 | ||
5868 | return true; | |
5869 | } | |
5870 | ||
5871 | /* Flush the output symbols to the file. */ | |
5872 | ||
5873 | static boolean | |
5874 | elf_link_flush_output_syms (finfo) | |
5875 | struct elf_final_link_info *finfo; | |
5876 | { | |
5877 | if (finfo->symbuf_count > 0) | |
5878 | { | |
9ad5cbcf | 5879 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
5880 | file_ptr pos; |
5881 | bfd_size_type amt; | |
252b5132 | 5882 | |
9ad5cbcf AM |
5883 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
5884 | pos = hdr->sh_offset + hdr->sh_size; | |
dc810e39 AM |
5885 | amt = finfo->symbuf_count * sizeof (Elf_External_Sym); |
5886 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
5887 | || bfd_bwrite ((PTR) finfo->symbuf, amt, finfo->output_bfd) != amt) | |
252b5132 RH |
5888 | return false; |
5889 | ||
9ad5cbcf AM |
5890 | hdr->sh_size += amt; |
5891 | ||
5892 | if (finfo->symshndxbuf != NULL) | |
5893 | { | |
5894 | hdr = &elf_tdata (finfo->output_bfd)->symtab_shndx_hdr; | |
5895 | pos = hdr->sh_offset + hdr->sh_size; | |
5896 | amt = finfo->symbuf_count * sizeof (Elf_External_Sym_Shndx); | |
5897 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
5898 | || (bfd_bwrite ((PTR) finfo->symshndxbuf, amt, finfo->output_bfd) | |
5899 | != amt)) | |
5900 | return false; | |
5901 | ||
5902 | hdr->sh_size += amt; | |
5903 | } | |
252b5132 RH |
5904 | |
5905 | finfo->symbuf_count = 0; | |
5906 | } | |
5907 | ||
5908 | return true; | |
5909 | } | |
5910 | ||
f5fa8ca2 JJ |
5911 | /* Adjust all external symbols pointing into SEC_MERGE sections |
5912 | to reflect the object merging within the sections. */ | |
5913 | ||
5914 | static boolean | |
5915 | elf_link_sec_merge_syms (h, data) | |
5916 | struct elf_link_hash_entry *h; | |
5917 | PTR data; | |
5918 | { | |
5919 | asection *sec; | |
5920 | ||
e92d460e AM |
5921 | if (h->root.type == bfd_link_hash_warning) |
5922 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5923 | ||
f5fa8ca2 JJ |
5924 | if ((h->root.type == bfd_link_hash_defined |
5925 | || h->root.type == bfd_link_hash_defweak) | |
5926 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
65765700 | 5927 | && elf_section_data (sec)->sec_info_type == ELF_INFO_TYPE_MERGE) |
f5fa8ca2 JJ |
5928 | { |
5929 | bfd *output_bfd = (bfd *) data; | |
5930 | ||
5931 | h->root.u.def.value = | |
5932 | _bfd_merged_section_offset (output_bfd, | |
5933 | &h->root.u.def.section, | |
65765700 | 5934 | elf_section_data (sec)->sec_info, |
f5fa8ca2 JJ |
5935 | h->root.u.def.value, (bfd_vma) 0); |
5936 | } | |
5937 | ||
5938 | return true; | |
5939 | } | |
5940 | ||
f5d44ba0 AM |
5941 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
5942 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
5943 | versioned symbol that would normally require an explicit version. */ | |
5944 | ||
5945 | static boolean | |
5946 | elf_link_check_versioned_symbol (info, h) | |
5947 | struct bfd_link_info *info; | |
5948 | struct elf_link_hash_entry *h; | |
5949 | { | |
5950 | bfd *undef_bfd = h->root.u.undef.abfd; | |
5951 | struct elf_link_loaded_list *loaded; | |
f5d44ba0 AM |
5952 | |
5953 | if ((undef_bfd->flags & DYNAMIC) == 0 | |
5954 | || info->hash->creator->flavour != bfd_target_elf_flavour | |
5955 | || elf_dt_soname (h->root.u.undef.abfd) == NULL) | |
5956 | return false; | |
5957 | ||
5958 | for (loaded = elf_hash_table (info)->loaded; | |
5959 | loaded != NULL; | |
5960 | loaded = loaded->next) | |
5961 | { | |
5962 | bfd *input; | |
5963 | Elf_Internal_Shdr *hdr; | |
5964 | bfd_size_type symcount; | |
5965 | bfd_size_type extsymcount; | |
5966 | bfd_size_type extsymoff; | |
5967 | Elf_Internal_Shdr *versymhdr; | |
6cdc0ccc AM |
5968 | Elf_Internal_Sym *isym; |
5969 | Elf_Internal_Sym *isymend; | |
5970 | Elf_Internal_Sym *isymbuf; | |
f5d44ba0 | 5971 | Elf_External_Versym *ever; |
6cdc0ccc | 5972 | Elf_External_Versym *extversym; |
f5d44ba0 AM |
5973 | |
5974 | input = loaded->abfd; | |
5975 | ||
5976 | /* We check each DSO for a possible hidden versioned definition. */ | |
5977 | if (input == undef_bfd | |
5978 | || (input->flags & DYNAMIC) == 0 | |
5979 | || elf_dynversym (input) == 0) | |
5980 | continue; | |
5981 | ||
5982 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
5983 | ||
5984 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
5985 | if (elf_bad_symtab (input)) | |
5986 | { | |
5987 | extsymcount = symcount; | |
5988 | extsymoff = 0; | |
5989 | } | |
5990 | else | |
5991 | { | |
5992 | extsymcount = symcount - hdr->sh_info; | |
5993 | extsymoff = hdr->sh_info; | |
5994 | } | |
5995 | ||
5996 | if (extsymcount == 0) | |
5997 | continue; | |
5998 | ||
6cdc0ccc AM |
5999 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, |
6000 | NULL, NULL, NULL); | |
6001 | if (isymbuf == NULL) | |
f5d44ba0 AM |
6002 | return false; |
6003 | ||
f5d44ba0 AM |
6004 | /* Read in any version definitions. */ |
6005 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
6006 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
6007 | if (extversym == NULL) | |
6008 | goto error_ret; | |
6009 | ||
6010 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
6011 | || (bfd_bread ((PTR) extversym, versymhdr->sh_size, input) | |
6012 | != versymhdr->sh_size)) | |
6013 | { | |
6014 | free (extversym); | |
6015 | error_ret: | |
6cdc0ccc | 6016 | free (isymbuf); |
f5d44ba0 AM |
6017 | return false; |
6018 | } | |
6019 | ||
6020 | ever = extversym + extsymoff; | |
6cdc0ccc AM |
6021 | isymend = isymbuf + extsymcount; |
6022 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
f5d44ba0 AM |
6023 | { |
6024 | const char *name; | |
f5d44ba0 AM |
6025 | Elf_Internal_Versym iver; |
6026 | ||
6cdc0ccc AM |
6027 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL |
6028 | || isym->st_shndx == SHN_UNDEF) | |
f5d44ba0 AM |
6029 | continue; |
6030 | ||
6031 | name = bfd_elf_string_from_elf_section (input, | |
6032 | hdr->sh_link, | |
6cdc0ccc | 6033 | isym->st_name); |
f5d44ba0 AM |
6034 | if (strcmp (name, h->root.root.string) != 0) |
6035 | continue; | |
6036 | ||
6037 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
6038 | ||
6039 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
6040 | { | |
6041 | /* If we have a non-hidden versioned sym, then it should | |
6042 | have provided a definition for the undefined sym. */ | |
6043 | abort (); | |
6044 | } | |
6045 | ||
6046 | if ((iver.vs_vers & VERSYM_VERSION) == 2) | |
6047 | { | |
6048 | /* This is the oldest (default) sym. We can use it. */ | |
6049 | free (extversym); | |
6cdc0ccc | 6050 | free (isymbuf); |
f5d44ba0 AM |
6051 | return true; |
6052 | } | |
6053 | } | |
6054 | ||
6055 | free (extversym); | |
6cdc0ccc | 6056 | free (isymbuf); |
f5d44ba0 AM |
6057 | } |
6058 | ||
6059 | return false; | |
6060 | } | |
6061 | ||
252b5132 RH |
6062 | /* Add an external symbol to the symbol table. This is called from |
6063 | the hash table traversal routine. When generating a shared object, | |
6064 | we go through the symbol table twice. The first time we output | |
6065 | anything that might have been forced to local scope in a version | |
6066 | script. The second time we output the symbols that are still | |
6067 | global symbols. */ | |
6068 | ||
6069 | static boolean | |
6070 | elf_link_output_extsym (h, data) | |
6071 | struct elf_link_hash_entry *h; | |
6072 | PTR data; | |
6073 | { | |
6074 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; | |
6075 | struct elf_final_link_info *finfo = eoinfo->finfo; | |
6076 | boolean strip; | |
6077 | Elf_Internal_Sym sym; | |
6078 | asection *input_sec; | |
6079 | ||
e92d460e AM |
6080 | if (h->root.type == bfd_link_hash_warning) |
6081 | { | |
6082 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6083 | if (h->root.type == bfd_link_hash_new) | |
6084 | return true; | |
6085 | } | |
6086 | ||
252b5132 RH |
6087 | /* Decide whether to output this symbol in this pass. */ |
6088 | if (eoinfo->localsyms) | |
6089 | { | |
6090 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
6091 | return true; | |
6092 | } | |
6093 | else | |
6094 | { | |
6095 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
6096 | return true; | |
6097 | } | |
6098 | ||
6099 | /* If we are not creating a shared library, and this symbol is | |
6100 | referenced by a shared library but is not defined anywhere, then | |
6101 | warn that it is undefined. If we do not do this, the runtime | |
6102 | linker will complain that the symbol is undefined when the | |
6103 | program is run. We don't have to worry about symbols that are | |
6104 | referenced by regular files, because we will already have issued | |
6105 | warnings for them. */ | |
6106 | if (! finfo->info->relocateable | |
b79e8c78 | 6107 | && ! finfo->info->allow_shlib_undefined |
e45bf863 | 6108 | && ! finfo->info->shared |
252b5132 RH |
6109 | && h->root.type == bfd_link_hash_undefined |
6110 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 | |
f5d44ba0 AM |
6111 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
6112 | && ! elf_link_check_versioned_symbol (finfo->info, h)) | |
252b5132 RH |
6113 | { |
6114 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6115 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
dc810e39 | 6116 | (asection *) NULL, (bfd_vma) 0, true))) |
252b5132 RH |
6117 | { |
6118 | eoinfo->failed = true; | |
6119 | return false; | |
6120 | } | |
6121 | } | |
6122 | ||
6123 | /* We don't want to output symbols that have never been mentioned by | |
6124 | a regular file, or that we have been told to strip. However, if | |
6125 | h->indx is set to -2, the symbol is used by a reloc and we must | |
6126 | output it. */ | |
6127 | if (h->indx == -2) | |
6128 | strip = false; | |
6129 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
6130 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
6131 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
6132 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
6133 | strip = true; | |
6134 | else if (finfo->info->strip == strip_all | |
6135 | || (finfo->info->strip == strip_some | |
6136 | && bfd_hash_lookup (finfo->info->keep_hash, | |
6137 | h->root.root.string, | |
6138 | false, false) == NULL)) | |
6139 | strip = true; | |
6140 | else | |
6141 | strip = false; | |
6142 | ||
6143 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
2bd171e0 ILT |
6144 | nothing else to do unless it is a forced local symbol. */ |
6145 | if (strip | |
6146 | && h->dynindx == -1 | |
6147 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
6148 | return true; |
6149 | ||
6150 | sym.st_value = 0; | |
6151 | sym.st_size = h->size; | |
6152 | sym.st_other = h->other; | |
6153 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
6154 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
6155 | else if (h->root.type == bfd_link_hash_undefweak | |
6156 | || h->root.type == bfd_link_hash_defweak) | |
6157 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
6158 | else | |
6159 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
6160 | ||
6161 | switch (h->root.type) | |
6162 | { | |
6163 | default: | |
6164 | case bfd_link_hash_new: | |
e92d460e | 6165 | case bfd_link_hash_warning: |
252b5132 RH |
6166 | abort (); |
6167 | return false; | |
6168 | ||
6169 | case bfd_link_hash_undefined: | |
252b5132 RH |
6170 | case bfd_link_hash_undefweak: |
6171 | input_sec = bfd_und_section_ptr; | |
6172 | sym.st_shndx = SHN_UNDEF; | |
6173 | break; | |
6174 | ||
6175 | case bfd_link_hash_defined: | |
6176 | case bfd_link_hash_defweak: | |
6177 | { | |
6178 | input_sec = h->root.u.def.section; | |
6179 | if (input_sec->output_section != NULL) | |
6180 | { | |
6181 | sym.st_shndx = | |
6182 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
6183 | input_sec->output_section); | |
9ad5cbcf | 6184 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
6185 | { |
6186 | (*_bfd_error_handler) | |
6187 | (_("%s: could not find output section %s for input section %s"), | |
6188 | bfd_get_filename (finfo->output_bfd), | |
6189 | input_sec->output_section->name, | |
6190 | input_sec->name); | |
6191 | eoinfo->failed = true; | |
6192 | return false; | |
6193 | } | |
6194 | ||
6195 | /* ELF symbols in relocateable files are section relative, | |
6196 | but in nonrelocateable files they are virtual | |
6197 | addresses. */ | |
6198 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
6199 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6200 | { |
6201 | sym.st_value += input_sec->output_section->vma; | |
6202 | if (h->type == STT_TLS) | |
6203 | { | |
6204 | /* STT_TLS symbols are relative to PT_TLS segment | |
6205 | base. */ | |
6206 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6207 | sym.st_value -= finfo->first_tls_sec->vma; | |
6208 | } | |
6209 | } | |
252b5132 RH |
6210 | } |
6211 | else | |
6212 | { | |
6213 | BFD_ASSERT (input_sec->owner == NULL | |
6214 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
6215 | sym.st_shndx = SHN_UNDEF; | |
6216 | input_sec = bfd_und_section_ptr; | |
6217 | } | |
6218 | } | |
6219 | break; | |
6220 | ||
6221 | case bfd_link_hash_common: | |
6222 | input_sec = h->root.u.c.p->section; | |
6223 | sym.st_shndx = SHN_COMMON; | |
6224 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
6225 | break; | |
6226 | ||
6227 | case bfd_link_hash_indirect: | |
6228 | /* These symbols are created by symbol versioning. They point | |
c44233aa AM |
6229 | to the decorated version of the name. For example, if the |
6230 | symbol foo@@GNU_1.2 is the default, which should be used when | |
6231 | foo is used with no version, then we add an indirect symbol | |
6232 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
6233 | since the indirected symbol is already in the hash table. */ | |
94b6c40a | 6234 | return true; |
252b5132 RH |
6235 | } |
6236 | ||
6237 | /* Give the processor backend a chance to tweak the symbol value, | |
6238 | and also to finish up anything that needs to be done for this | |
c44233aa AM |
6239 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for |
6240 | forced local syms when non-shared is due to a historical quirk. */ | |
252b5132 RH |
6241 | if ((h->dynindx != -1 |
6242 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
c44233aa AM |
6243 | && (finfo->info->shared |
6244 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
6245 | && elf_hash_table (finfo->info)->dynamic_sections_created) |
6246 | { | |
6247 | struct elf_backend_data *bed; | |
6248 | ||
6249 | bed = get_elf_backend_data (finfo->output_bfd); | |
6250 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
6251 | (finfo->output_bfd, finfo->info, h, &sym))) | |
6252 | { | |
6253 | eoinfo->failed = true; | |
6254 | return false; | |
6255 | } | |
6256 | } | |
6257 | ||
6258 | /* If we are marking the symbol as undefined, and there are no | |
6259 | non-weak references to this symbol from a regular object, then | |
91d3970e ILT |
6260 | mark the symbol as weak undefined; if there are non-weak |
6261 | references, mark the symbol as strong. We can't do this earlier, | |
252b5132 RH |
6262 | because it might not be marked as undefined until the |
6263 | finish_dynamic_symbol routine gets through with it. */ | |
6264 | if (sym.st_shndx == SHN_UNDEF | |
252b5132 | 6265 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 |
a7b97311 AM |
6266 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
6267 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
91d3970e ILT |
6268 | { |
6269 | int bindtype; | |
6270 | ||
6271 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0) | |
6272 | bindtype = STB_GLOBAL; | |
6273 | else | |
6274 | bindtype = STB_WEAK; | |
6275 | sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info)); | |
6276 | } | |
252b5132 | 6277 | |
32c092c3 | 6278 | /* If a symbol is not defined locally, we clear the visibility |
3e932841 | 6279 | field. */ |
2cd533b7 L |
6280 | if (! finfo->info->relocateable |
6281 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
a7b97311 | 6282 | sym.st_other ^= ELF_ST_VISIBILITY (sym.st_other); |
32c092c3 | 6283 | |
252b5132 | 6284 | /* If this symbol should be put in the .dynsym section, then put it |
f5d44ba0 AM |
6285 | there now. We already know the symbol index. We also fill in |
6286 | the entry in the .hash section. */ | |
252b5132 RH |
6287 | if (h->dynindx != -1 |
6288 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
6289 | { | |
6290 | size_t bucketcount; | |
6291 | size_t bucket; | |
c7ac6ff8 | 6292 | size_t hash_entry_size; |
252b5132 RH |
6293 | bfd_byte *bucketpos; |
6294 | bfd_vma chain; | |
dc810e39 | 6295 | Elf_External_Sym *esym; |
252b5132 RH |
6296 | |
6297 | sym.st_name = h->dynstr_index; | |
dc810e39 | 6298 | esym = (Elf_External_Sym *) finfo->dynsym_sec->contents + h->dynindx; |
9ad5cbcf | 6299 | elf_swap_symbol_out (finfo->output_bfd, &sym, (PTR) esym, (PTR) 0); |
252b5132 RH |
6300 | |
6301 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
6302 | bucket = h->elf_hash_value % bucketcount; | |
3e932841 | 6303 | hash_entry_size |
c7ac6ff8 | 6304 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; |
252b5132 | 6305 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
c7ac6ff8 MM |
6306 | + (bucket + 2) * hash_entry_size); |
6307 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
dc810e39 AM |
6308 | bfd_put (8 * hash_entry_size, finfo->output_bfd, (bfd_vma) h->dynindx, |
6309 | bucketpos); | |
c7ac6ff8 MM |
6310 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, |
6311 | ((bfd_byte *) finfo->hash_sec->contents | |
6312 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
252b5132 RH |
6313 | |
6314 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
6315 | { | |
6316 | Elf_Internal_Versym iversym; | |
dc810e39 | 6317 | Elf_External_Versym *eversym; |
252b5132 RH |
6318 | |
6319 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
6320 | { | |
6321 | if (h->verinfo.verdef == NULL) | |
6322 | iversym.vs_vers = 0; | |
6323 | else | |
6324 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
6325 | } | |
6326 | else | |
6327 | { | |
6328 | if (h->verinfo.vertree == NULL) | |
6329 | iversym.vs_vers = 1; | |
6330 | else | |
6331 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
6332 | } | |
6333 | ||
6334 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
6335 | iversym.vs_vers |= VERSYM_HIDDEN; | |
6336 | ||
dc810e39 AM |
6337 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; |
6338 | eversym += h->dynindx; | |
6339 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
252b5132 RH |
6340 | } |
6341 | } | |
6342 | ||
6343 | /* If we're stripping it, then it was just a dynamic symbol, and | |
6344 | there's nothing else to do. */ | |
6345 | if (strip) | |
6346 | return true; | |
6347 | ||
6348 | h->indx = bfd_get_symcount (finfo->output_bfd); | |
6349 | ||
6350 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) | |
6351 | { | |
6352 | eoinfo->failed = true; | |
6353 | return false; | |
6354 | } | |
6355 | ||
6356 | return true; | |
6357 | } | |
6358 | ||
23bc299b MM |
6359 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which |
6360 | originated from the section given by INPUT_REL_HDR) to the | |
6361 | OUTPUT_BFD. */ | |
6362 | ||
41241523 | 6363 | static boolean |
3e932841 | 6364 | elf_link_output_relocs (output_bfd, input_section, input_rel_hdr, |
23bc299b MM |
6365 | internal_relocs) |
6366 | bfd *output_bfd; | |
6367 | asection *input_section; | |
6368 | Elf_Internal_Shdr *input_rel_hdr; | |
6369 | Elf_Internal_Rela *internal_relocs; | |
6370 | { | |
6371 | Elf_Internal_Rela *irela; | |
6372 | Elf_Internal_Rela *irelaend; | |
6373 | Elf_Internal_Shdr *output_rel_hdr; | |
6374 | asection *output_section; | |
7442e600 | 6375 | unsigned int *rel_countp = NULL; |
32f0787a | 6376 | struct elf_backend_data *bed; |
dc810e39 | 6377 | bfd_size_type amt; |
23bc299b MM |
6378 | |
6379 | output_section = input_section->output_section; | |
6380 | output_rel_hdr = NULL; | |
6381 | ||
3e932841 | 6382 | if (elf_section_data (output_section)->rel_hdr.sh_entsize |
23bc299b MM |
6383 | == input_rel_hdr->sh_entsize) |
6384 | { | |
6385 | output_rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6386 | rel_countp = &elf_section_data (output_section)->rel_count; | |
6387 | } | |
6388 | else if (elf_section_data (output_section)->rel_hdr2 | |
6389 | && (elf_section_data (output_section)->rel_hdr2->sh_entsize | |
6390 | == input_rel_hdr->sh_entsize)) | |
6391 | { | |
6392 | output_rel_hdr = elf_section_data (output_section)->rel_hdr2; | |
6393 | rel_countp = &elf_section_data (output_section)->rel_count2; | |
6394 | } | |
41241523 TS |
6395 | else |
6396 | { | |
58821868 AM |
6397 | (*_bfd_error_handler) |
6398 | (_("%s: relocation size mismatch in %s section %s"), | |
6399 | bfd_get_filename (output_bfd), | |
6400 | bfd_archive_filename (input_section->owner), | |
6401 | input_section->name); | |
41241523 TS |
6402 | bfd_set_error (bfd_error_wrong_object_format); |
6403 | return false; | |
6404 | } | |
32f0787a UC |
6405 | |
6406 | bed = get_elf_backend_data (output_bfd); | |
23bc299b | 6407 | irela = internal_relocs; |
58821868 AM |
6408 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) |
6409 | * bed->s->int_rels_per_ext_rel); | |
209f668e | 6410 | |
23bc299b MM |
6411 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
6412 | { | |
6413 | Elf_External_Rel *erel; | |
209f668e | 6414 | Elf_Internal_Rel *irel; |
dc810e39 AM |
6415 | |
6416 | amt = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rel); | |
6417 | irel = (Elf_Internal_Rel *) bfd_zmalloc (amt); | |
209f668e NC |
6418 | if (irel == NULL) |
6419 | { | |
6420 | (*_bfd_error_handler) (_("Error: out of memory")); | |
6421 | abort (); | |
6422 | } | |
23bc299b MM |
6423 | |
6424 | erel = ((Elf_External_Rel *) output_rel_hdr->contents + *rel_countp); | |
209f668e | 6425 | for (; irela < irelaend; irela += bed->s->int_rels_per_ext_rel, erel++) |
23bc299b | 6426 | { |
4e8a9624 | 6427 | unsigned int i; |
dc810e39 | 6428 | |
209f668e NC |
6429 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
6430 | { | |
6431 | irel[i].r_offset = irela[i].r_offset; | |
6432 | irel[i].r_info = irela[i].r_info; | |
6433 | BFD_ASSERT (irela[i].r_addend == 0); | |
6434 | } | |
23bc299b | 6435 | |
32f0787a | 6436 | if (bed->s->swap_reloc_out) |
209f668e | 6437 | (*bed->s->swap_reloc_out) (output_bfd, irel, (PTR) erel); |
32f0787a | 6438 | else |
209f668e | 6439 | elf_swap_reloc_out (output_bfd, irel, erel); |
23bc299b | 6440 | } |
209f668e NC |
6441 | |
6442 | free (irel); | |
23bc299b MM |
6443 | } |
6444 | else | |
6445 | { | |
6446 | Elf_External_Rela *erela; | |
6447 | ||
209f668e NC |
6448 | BFD_ASSERT (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rela)); |
6449 | ||
23bc299b | 6450 | erela = ((Elf_External_Rela *) output_rel_hdr->contents + *rel_countp); |
209f668e | 6451 | for (; irela < irelaend; irela += bed->s->int_rels_per_ext_rel, erela++) |
32f0787a UC |
6452 | if (bed->s->swap_reloca_out) |
6453 | (*bed->s->swap_reloca_out) (output_bfd, irela, (PTR) erela); | |
6454 | else | |
6455 | elf_swap_reloca_out (output_bfd, irela, erela); | |
23bc299b MM |
6456 | } |
6457 | ||
6458 | /* Bump the counter, so that we know where to add the next set of | |
6459 | relocations. */ | |
d9bc7a44 | 6460 | *rel_countp += NUM_SHDR_ENTRIES (input_rel_hdr); |
41241523 TS |
6461 | |
6462 | return true; | |
23bc299b MM |
6463 | } |
6464 | ||
252b5132 RH |
6465 | /* Link an input file into the linker output file. This function |
6466 | handles all the sections and relocations of the input file at once. | |
6467 | This is so that we only have to read the local symbols once, and | |
6468 | don't have to keep them in memory. */ | |
6469 | ||
6470 | static boolean | |
6471 | elf_link_input_bfd (finfo, input_bfd) | |
6472 | struct elf_final_link_info *finfo; | |
6473 | bfd *input_bfd; | |
6474 | { | |
6475 | boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *, | |
6476 | bfd *, asection *, bfd_byte *, | |
6477 | Elf_Internal_Rela *, | |
6478 | Elf_Internal_Sym *, asection **)); | |
6479 | bfd *output_bfd; | |
6480 | Elf_Internal_Shdr *symtab_hdr; | |
6481 | size_t locsymcount; | |
6482 | size_t extsymoff; | |
6cdc0ccc | 6483 | Elf_Internal_Sym *isymbuf; |
252b5132 | 6484 | Elf_Internal_Sym *isym; |
6cdc0ccc | 6485 | Elf_Internal_Sym *isymend; |
252b5132 RH |
6486 | long *pindex; |
6487 | asection **ppsection; | |
6488 | asection *o; | |
c7ac6ff8 | 6489 | struct elf_backend_data *bed; |
9317eacc | 6490 | boolean emit_relocs; |
f8deed93 | 6491 | struct elf_link_hash_entry **sym_hashes; |
252b5132 RH |
6492 | |
6493 | output_bfd = finfo->output_bfd; | |
c7ac6ff8 MM |
6494 | bed = get_elf_backend_data (output_bfd); |
6495 | relocate_section = bed->elf_backend_relocate_section; | |
252b5132 RH |
6496 | |
6497 | /* If this is a dynamic object, we don't want to do anything here: | |
6498 | we don't want the local symbols, and we don't want the section | |
6499 | contents. */ | |
6500 | if ((input_bfd->flags & DYNAMIC) != 0) | |
6501 | return true; | |
6502 | ||
9317eacc | 6503 | emit_relocs = (finfo->info->relocateable |
c44233aa AM |
6504 | || finfo->info->emitrelocations |
6505 | || bed->elf_backend_emit_relocs); | |
9317eacc | 6506 | |
252b5132 RH |
6507 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
6508 | if (elf_bad_symtab (input_bfd)) | |
6509 | { | |
6510 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
6511 | extsymoff = 0; | |
6512 | } | |
6513 | else | |
6514 | { | |
6515 | locsymcount = symtab_hdr->sh_info; | |
6516 | extsymoff = symtab_hdr->sh_info; | |
6517 | } | |
6518 | ||
6519 | /* Read the local symbols. */ | |
6cdc0ccc AM |
6520 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
6521 | if (isymbuf == NULL && locsymcount != 0) | |
6522 | { | |
6523 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
6524 | finfo->internal_syms, | |
6525 | finfo->external_syms, | |
6526 | finfo->locsym_shndx); | |
6527 | if (isymbuf == NULL) | |
252b5132 RH |
6528 | return false; |
6529 | } | |
6530 | ||
6cdc0ccc AM |
6531 | /* Find local symbol sections and adjust values of symbols in |
6532 | SEC_MERGE sections. Write out those local symbols we know are | |
6533 | going into the output file. */ | |
6534 | isymend = isymbuf + locsymcount; | |
6535 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
6536 | isym < isymend; | |
6537 | isym++, pindex++, ppsection++) | |
252b5132 RH |
6538 | { |
6539 | asection *isec; | |
6540 | const char *name; | |
6541 | Elf_Internal_Sym osym; | |
6542 | ||
252b5132 RH |
6543 | *pindex = -1; |
6544 | ||
6545 | if (elf_bad_symtab (input_bfd)) | |
6546 | { | |
6547 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
6548 | { | |
6549 | *ppsection = NULL; | |
6550 | continue; | |
6551 | } | |
6552 | } | |
6553 | ||
6554 | if (isym->st_shndx == SHN_UNDEF) | |
862517b6 | 6555 | isec = bfd_und_section_ptr; |
9ad5cbcf AM |
6556 | else if (isym->st_shndx < SHN_LORESERVE |
6557 | || isym->st_shndx > SHN_HIRESERVE) | |
f5fa8ca2 JJ |
6558 | { |
6559 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
65765700 JJ |
6560 | if (isec |
6561 | && elf_section_data (isec)->sec_info_type == ELF_INFO_TYPE_MERGE | |
f5fa8ca2 JJ |
6562 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
6563 | isym->st_value = | |
6564 | _bfd_merged_section_offset (output_bfd, &isec, | |
65765700 | 6565 | elf_section_data (isec)->sec_info, |
f5fa8ca2 JJ |
6566 | isym->st_value, (bfd_vma) 0); |
6567 | } | |
252b5132 | 6568 | else if (isym->st_shndx == SHN_ABS) |
862517b6 | 6569 | isec = bfd_abs_section_ptr; |
252b5132 | 6570 | else if (isym->st_shndx == SHN_COMMON) |
862517b6 | 6571 | isec = bfd_com_section_ptr; |
252b5132 RH |
6572 | else |
6573 | { | |
6574 | /* Who knows? */ | |
6575 | isec = NULL; | |
6576 | } | |
6577 | ||
6578 | *ppsection = isec; | |
6579 | ||
6580 | /* Don't output the first, undefined, symbol. */ | |
6cdc0ccc | 6581 | if (ppsection == finfo->sections) |
252b5132 RH |
6582 | continue; |
6583 | ||
24376d1b AM |
6584 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
6585 | { | |
24376d1b AM |
6586 | /* We never output section symbols. Instead, we use the |
6587 | section symbol of the corresponding section in the output | |
6588 | file. */ | |
6589 | continue; | |
6590 | } | |
6591 | ||
252b5132 RH |
6592 | /* If we are stripping all symbols, we don't want to output this |
6593 | one. */ | |
6594 | if (finfo->info->strip == strip_all) | |
6595 | continue; | |
6596 | ||
252b5132 RH |
6597 | /* If we are discarding all local symbols, we don't want to |
6598 | output this one. If we are generating a relocateable output | |
6599 | file, then some of the local symbols may be required by | |
6600 | relocs; we output them below as we discover that they are | |
6601 | needed. */ | |
6602 | if (finfo->info->discard == discard_all) | |
6603 | continue; | |
6604 | ||
6605 | /* If this symbol is defined in a section which we are | |
c44233aa AM |
6606 | discarding, we don't need to keep it, but note that |
6607 | linker_mark is only reliable for sections that have contents. | |
6608 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
6609 | as well as linker_mark. */ | |
9ad5cbcf | 6610 | if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 RH |
6611 | && isec != NULL |
6612 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) | |
6613 | || (! finfo->info->relocateable | |
6614 | && (isec->flags & SEC_EXCLUDE) != 0))) | |
6615 | continue; | |
6616 | ||
6617 | /* Get the name of the symbol. */ | |
6618 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
6619 | isym->st_name); | |
6620 | if (name == NULL) | |
6621 | return false; | |
6622 | ||
6623 | /* See if we are discarding symbols with this name. */ | |
6624 | if ((finfo->info->strip == strip_some | |
6625 | && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false) | |
6626 | == NULL)) | |
f5fa8ca2 JJ |
6627 | || (((finfo->info->discard == discard_sec_merge |
6628 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocateable) | |
6629 | || finfo->info->discard == discard_l) | |
252b5132 RH |
6630 | && bfd_is_local_label_name (input_bfd, name))) |
6631 | continue; | |
6632 | ||
6633 | /* If we get here, we are going to output this symbol. */ | |
6634 | ||
6635 | osym = *isym; | |
6636 | ||
6637 | /* Adjust the section index for the output file. */ | |
6638 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
6639 | isec->output_section); | |
9ad5cbcf | 6640 | if (osym.st_shndx == SHN_BAD) |
252b5132 RH |
6641 | return false; |
6642 | ||
6643 | *pindex = bfd_get_symcount (output_bfd); | |
6644 | ||
6645 | /* ELF symbols in relocateable files are section relative, but | |
6646 | in executable files they are virtual addresses. Note that | |
6647 | this code assumes that all ELF sections have an associated | |
6648 | BFD section with a reasonable value for output_offset; below | |
6649 | we assume that they also have a reasonable value for | |
6650 | output_section. Any special sections must be set up to meet | |
6651 | these requirements. */ | |
6652 | osym.st_value += isec->output_offset; | |
6653 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6654 | { |
6655 | osym.st_value += isec->output_section->vma; | |
6656 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
6657 | { | |
6658 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
6659 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6660 | osym.st_value -= finfo->first_tls_sec->vma; | |
6661 | } | |
6662 | } | |
252b5132 RH |
6663 | |
6664 | if (! elf_link_output_sym (finfo, name, &osym, isec)) | |
6665 | return false; | |
6666 | } | |
6667 | ||
6668 | /* Relocate the contents of each section. */ | |
f8deed93 | 6669 | sym_hashes = elf_sym_hashes (input_bfd); |
252b5132 RH |
6670 | for (o = input_bfd->sections; o != NULL; o = o->next) |
6671 | { | |
6672 | bfd_byte *contents; | |
6673 | ||
6674 | if (! o->linker_mark) | |
6675 | { | |
6676 | /* This section was omitted from the link. */ | |
6677 | continue; | |
6678 | } | |
6679 | ||
6680 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
6681 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
6682 | continue; | |
6683 | ||
6684 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
6685 | { | |
6686 | /* Section was created by elf_link_create_dynamic_sections | |
6687 | or somesuch. */ | |
6688 | continue; | |
6689 | } | |
6690 | ||
6691 | /* Get the contents of the section. They have been cached by a | |
c44233aa AM |
6692 | relaxation routine. Note that o is a section in an input |
6693 | file, so the contents field will not have been set by any of | |
6694 | the routines which work on output files. */ | |
252b5132 RH |
6695 | if (elf_section_data (o)->this_hdr.contents != NULL) |
6696 | contents = elf_section_data (o)->this_hdr.contents; | |
6697 | else | |
6698 | { | |
6699 | contents = finfo->contents; | |
6700 | if (! bfd_get_section_contents (input_bfd, o, contents, | |
6701 | (file_ptr) 0, o->_raw_size)) | |
6702 | return false; | |
6703 | } | |
6704 | ||
6705 | if ((o->flags & SEC_RELOC) != 0) | |
6706 | { | |
6707 | Elf_Internal_Rela *internal_relocs; | |
6708 | ||
6709 | /* Get the swapped relocs. */ | |
6710 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
6711 | (input_bfd, o, finfo->external_relocs, | |
6712 | finfo->internal_relocs, false)); | |
6713 | if (internal_relocs == NULL | |
6714 | && o->reloc_count > 0) | |
6715 | return false; | |
6716 | ||
ec338859 AM |
6717 | /* Run through the relocs looking for any against symbols |
6718 | from discarded sections and section symbols from | |
6719 | removed link-once sections. Complain about relocs | |
6720 | against discarded sections. Zero relocs against removed | |
6721 | link-once sections. We should really complain if | |
6722 | anything in the final link tries to use it, but | |
6723 | DWARF-based exception handling might have an entry in | |
6724 | .eh_frame to describe a routine in the linkonce section, | |
6725 | and it turns out to be hard to remove the .eh_frame | |
6726 | entry too. FIXME. */ | |
73d074b4 DJ |
6727 | if (!finfo->info->relocateable |
6728 | && !elf_section_ignore_discarded_relocs (o)) | |
ec338859 AM |
6729 | { |
6730 | Elf_Internal_Rela *rel, *relend; | |
50b4d486 | 6731 | |
ec338859 AM |
6732 | rel = internal_relocs; |
6733 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
6734 | for ( ; rel < relend; rel++) | |
6735 | { | |
6736 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
6737 | ||
6738 | if (r_symndx >= locsymcount | |
6739 | || (elf_bad_symtab (input_bfd) | |
6740 | && finfo->sections[r_symndx] == NULL)) | |
6741 | { | |
6742 | struct elf_link_hash_entry *h; | |
6743 | ||
6744 | h = sym_hashes[r_symndx - extsymoff]; | |
6745 | while (h->root.type == bfd_link_hash_indirect | |
6746 | || h->root.type == bfd_link_hash_warning) | |
6747 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6748 | ||
6749 | /* Complain if the definition comes from a | |
6750 | discarded section. */ | |
6751 | if ((h->root.type == bfd_link_hash_defined | |
6752 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 6753 | && elf_discarded_section (h->root.u.def.section)) |
ec338859 | 6754 | { |
f8deed93 | 6755 | #if BFD_VERSION_DATE < 20031005 |
ec338859 AM |
6756 | if ((o->flags & SEC_DEBUGGING) != 0) |
6757 | { | |
f8deed93 | 6758 | #if BFD_VERSION_DATE > 20021005 |
ec338859 AM |
6759 | (*finfo->info->callbacks->warning) |
6760 | (finfo->info, | |
6761 | _("warning: relocation against removed section; zeroing"), | |
6762 | NULL, input_bfd, o, rel->r_offset); | |
f8deed93 | 6763 | #endif |
45e9217a | 6764 | BFD_ASSERT (r_symndx != 0); |
f8deed93 | 6765 | memset (rel, 0, sizeof (*rel)); |
ec338859 AM |
6766 | } |
6767 | else | |
f8deed93 | 6768 | #endif |
ec338859 AM |
6769 | { |
6770 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6771 | (finfo->info, h->root.root.string, | |
6772 | input_bfd, o, rel->r_offset, | |
6773 | true))) | |
6774 | return false; | |
6775 | } | |
6776 | } | |
6777 | } | |
6778 | else | |
6779 | { | |
f9f32305 | 6780 | asection *sec = finfo->sections[r_symndx]; |
50b4d486 | 6781 | |
ed4de5e2 | 6782 | if (sec != NULL && elf_discarded_section (sec)) |
f9f32305 | 6783 | { |
f8deed93 | 6784 | #if BFD_VERSION_DATE < 20031005 |
ad43ed4c L |
6785 | if ((o->flags & SEC_DEBUGGING) != 0 |
6786 | || (sec->flags & SEC_LINK_ONCE) != 0) | |
f9f32305 | 6787 | { |
50b4d486 | 6788 | #if BFD_VERSION_DATE > 20021005 |
f9f32305 AM |
6789 | (*finfo->info->callbacks->warning) |
6790 | (finfo->info, | |
6791 | _("warning: relocation against removed section"), | |
6792 | NULL, input_bfd, o, rel->r_offset); | |
50b4d486 | 6793 | #endif |
45e9217a | 6794 | BFD_ASSERT (r_symndx != 0); |
f9f32305 AM |
6795 | rel->r_info |
6796 | = ELF_R_INFO (0, ELF_R_TYPE (rel->r_info)); | |
6797 | rel->r_addend = 0; | |
6798 | } | |
6799 | else | |
f8deed93 | 6800 | #endif |
f9f32305 AM |
6801 | { |
6802 | boolean ok; | |
6803 | const char *msg | |
6804 | = _("local symbols in discarded section %s"); | |
6805 | bfd_size_type amt | |
6806 | = strlen (sec->name) + strlen (msg) - 1; | |
6807 | char *buf = (char *) bfd_malloc (amt); | |
6808 | ||
6809 | if (buf != NULL) | |
6810 | sprintf (buf, msg, sec->name); | |
6811 | else | |
6812 | buf = (char *) sec->name; | |
6813 | ok = (*finfo->info->callbacks | |
6814 | ->undefined_symbol) (finfo->info, buf, | |
6815 | input_bfd, o, | |
6816 | rel->r_offset, | |
6817 | true); | |
6818 | if (buf != sec->name) | |
6819 | free (buf); | |
6820 | if (!ok) | |
6821 | return false; | |
ec338859 AM |
6822 | } |
6823 | } | |
6824 | } | |
6825 | } | |
6826 | } | |
50b4d486 | 6827 | |
252b5132 RH |
6828 | /* Relocate the section by invoking a back end routine. |
6829 | ||
6830 | The back end routine is responsible for adjusting the | |
6831 | section contents as necessary, and (if using Rela relocs | |
6832 | and generating a relocateable output file) adjusting the | |
6833 | reloc addend as necessary. | |
6834 | ||
6835 | The back end routine does not have to worry about setting | |
6836 | the reloc address or the reloc symbol index. | |
6837 | ||
6838 | The back end routine is given a pointer to the swapped in | |
6839 | internal symbols, and can access the hash table entries | |
6840 | for the external symbols via elf_sym_hashes (input_bfd). | |
6841 | ||
6842 | When generating relocateable output, the back end routine | |
6843 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6844 | output symbol is going to be a section symbol | |
6845 | corresponding to the output section, which will require | |
6846 | the addend to be adjusted. */ | |
6847 | ||
6848 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6849 | input_bfd, o, contents, | |
6850 | internal_relocs, | |
6cdc0ccc | 6851 | isymbuf, |
252b5132 RH |
6852 | finfo->sections)) |
6853 | return false; | |
6854 | ||
9317eacc | 6855 | if (emit_relocs) |
252b5132 RH |
6856 | { |
6857 | Elf_Internal_Rela *irela; | |
6858 | Elf_Internal_Rela *irelaend; | |
6859 | struct elf_link_hash_entry **rel_hash; | |
c89583f8 | 6860 | Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2; |
4e8a9624 | 6861 | unsigned int next_erel; |
41241523 TS |
6862 | boolean (*reloc_emitter) PARAMS ((bfd *, asection *, |
6863 | Elf_Internal_Shdr *, | |
6864 | Elf_Internal_Rela *)); | |
b491616a AM |
6865 | boolean rela_normal; |
6866 | ||
6867 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
6868 | rela_normal = (bed->rela_normal | |
6869 | && (input_rel_hdr->sh_entsize | |
6870 | == sizeof (Elf_External_Rela))); | |
252b5132 RH |
6871 | |
6872 | /* Adjust the reloc addresses and symbol indices. */ | |
6873 | ||
6874 | irela = internal_relocs; | |
dc810e39 | 6875 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 6876 | rel_hash = (elf_section_data (o->output_section)->rel_hashes |
31367b81 MM |
6877 | + elf_section_data (o->output_section)->rel_count |
6878 | + elf_section_data (o->output_section)->rel_count2); | |
209f668e | 6879 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) |
252b5132 RH |
6880 | { |
6881 | unsigned long r_symndx; | |
252b5132 | 6882 | asection *sec; |
fad2542d | 6883 | Elf_Internal_Sym sym; |
252b5132 | 6884 | |
209f668e NC |
6885 | if (next_erel == bed->s->int_rels_per_ext_rel) |
6886 | { | |
6887 | rel_hash++; | |
6888 | next_erel = 0; | |
6889 | } | |
6890 | ||
252b5132 RH |
6891 | irela->r_offset += o->output_offset; |
6892 | ||
7ad34365 | 6893 | /* Relocs in an executable have to be virtual addresses. */ |
fd984e46 | 6894 | if (!finfo->info->relocateable) |
7ad34365 NC |
6895 | irela->r_offset += o->output_section->vma; |
6896 | ||
252b5132 RH |
6897 | r_symndx = ELF_R_SYM (irela->r_info); |
6898 | ||
6899 | if (r_symndx == 0) | |
6900 | continue; | |
6901 | ||
6902 | if (r_symndx >= locsymcount | |
6903 | || (elf_bad_symtab (input_bfd) | |
6904 | && finfo->sections[r_symndx] == NULL)) | |
6905 | { | |
6906 | struct elf_link_hash_entry *rh; | |
209f668e | 6907 | unsigned long indx; |
252b5132 RH |
6908 | |
6909 | /* This is a reloc against a global symbol. We | |
6910 | have not yet output all the local symbols, so | |
6911 | we do not know the symbol index of any global | |
6912 | symbol. We set the rel_hash entry for this | |
6913 | reloc to point to the global hash table entry | |
6914 | for this symbol. The symbol index is then | |
6915 | set at the end of elf_bfd_final_link. */ | |
6916 | indx = r_symndx - extsymoff; | |
6917 | rh = elf_sym_hashes (input_bfd)[indx]; | |
6918 | while (rh->root.type == bfd_link_hash_indirect | |
6919 | || rh->root.type == bfd_link_hash_warning) | |
6920 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
6921 | ||
6922 | /* Setting the index to -2 tells | |
6923 | elf_link_output_extsym that this symbol is | |
6924 | used by a reloc. */ | |
6925 | BFD_ASSERT (rh->indx < 0); | |
6926 | rh->indx = -2; | |
6927 | ||
6928 | *rel_hash = rh; | |
6929 | ||
6930 | continue; | |
6931 | } | |
6932 | ||
3e932841 | 6933 | /* This is a reloc against a local symbol. */ |
252b5132 RH |
6934 | |
6935 | *rel_hash = NULL; | |
fad2542d | 6936 | sym = isymbuf[r_symndx]; |
252b5132 | 6937 | sec = finfo->sections[r_symndx]; |
fad2542d | 6938 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
252b5132 RH |
6939 | { |
6940 | /* I suppose the backend ought to fill in the | |
6941 | section of any STT_SECTION symbol against a | |
6942 | processor specific section. If we have | |
6943 | discarded a section, the output_section will | |
6944 | be the absolute section. */ | |
b491616a AM |
6945 | if (bfd_is_abs_section (sec) |
6946 | || (sec != NULL | |
6947 | && bfd_is_abs_section (sec->output_section))) | |
252b5132 RH |
6948 | r_symndx = 0; |
6949 | else if (sec == NULL || sec->owner == NULL) | |
6950 | { | |
6951 | bfd_set_error (bfd_error_bad_value); | |
6952 | return false; | |
6953 | } | |
6954 | else | |
6955 | { | |
6956 | r_symndx = sec->output_section->target_index; | |
6957 | BFD_ASSERT (r_symndx != 0); | |
6958 | } | |
b491616a AM |
6959 | |
6960 | /* Adjust the addend according to where the | |
f5d44ba0 | 6961 | section winds up in the output section. */ |
b491616a AM |
6962 | if (rela_normal) |
6963 | irela->r_addend += sec->output_offset; | |
252b5132 RH |
6964 | } |
6965 | else | |
6966 | { | |
6967 | if (finfo->indices[r_symndx] == -1) | |
6968 | { | |
dc810e39 | 6969 | unsigned long shlink; |
252b5132 RH |
6970 | const char *name; |
6971 | asection *osec; | |
6972 | ||
6973 | if (finfo->info->strip == strip_all) | |
6974 | { | |
6975 | /* You can't do ld -r -s. */ | |
6976 | bfd_set_error (bfd_error_invalid_operation); | |
6977 | return false; | |
6978 | } | |
6979 | ||
6980 | /* This symbol was skipped earlier, but | |
6981 | since it is needed by a reloc, we | |
6982 | must output it now. */ | |
dc810e39 | 6983 | shlink = symtab_hdr->sh_link; |
a7b97311 | 6984 | name = (bfd_elf_string_from_elf_section |
fad2542d | 6985 | (input_bfd, shlink, sym.st_name)); |
252b5132 RH |
6986 | if (name == NULL) |
6987 | return false; | |
6988 | ||
6989 | osec = sec->output_section; | |
fad2542d | 6990 | sym.st_shndx = |
252b5132 RH |
6991 | _bfd_elf_section_from_bfd_section (output_bfd, |
6992 | osec); | |
fad2542d | 6993 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
6994 | return false; |
6995 | ||
fad2542d | 6996 | sym.st_value += sec->output_offset; |
252b5132 | 6997 | if (! finfo->info->relocateable) |
13ae64f3 | 6998 | { |
fad2542d AM |
6999 | sym.st_value += osec->vma; |
7000 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
13ae64f3 JJ |
7001 | { |
7002 | /* STT_TLS symbols are relative to PT_TLS | |
7003 | segment base. */ | |
7004 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
fad2542d | 7005 | sym.st_value -= finfo->first_tls_sec->vma; |
13ae64f3 JJ |
7006 | } |
7007 | } | |
252b5132 | 7008 | |
a7b97311 AM |
7009 | finfo->indices[r_symndx] |
7010 | = bfd_get_symcount (output_bfd); | |
252b5132 | 7011 | |
fad2542d | 7012 | if (! elf_link_output_sym (finfo, name, &sym, sec)) |
252b5132 RH |
7013 | return false; |
7014 | } | |
7015 | ||
7016 | r_symndx = finfo->indices[r_symndx]; | |
7017 | } | |
7018 | ||
7019 | irela->r_info = ELF_R_INFO (r_symndx, | |
7020 | ELF_R_TYPE (irela->r_info)); | |
7021 | } | |
7022 | ||
7023 | /* Swap out the relocs. */ | |
c44233aa AM |
7024 | if (bed->elf_backend_emit_relocs |
7025 | && !(finfo->info->relocateable | |
a7b97311 | 7026 | || finfo->info->emitrelocations)) |
c44233aa AM |
7027 | reloc_emitter = bed->elf_backend_emit_relocs; |
7028 | else | |
7029 | reloc_emitter = elf_link_output_relocs; | |
9317eacc | 7030 | |
c89583f8 AM |
7031 | if (input_rel_hdr->sh_size != 0 |
7032 | && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr, | |
7033 | internal_relocs)) | |
41241523 | 7034 | return false; |
9317eacc | 7035 | |
c89583f8 AM |
7036 | input_rel_hdr2 = elf_section_data (o)->rel_hdr2; |
7037 | if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0) | |
c44233aa AM |
7038 | { |
7039 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) | |
dc810e39 | 7040 | * bed->s->int_rels_per_ext_rel); |
c89583f8 | 7041 | if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2, |
41241523 TS |
7042 | internal_relocs)) |
7043 | return false; | |
c44233aa | 7044 | } |
252b5132 RH |
7045 | } |
7046 | } | |
7047 | ||
7048 | /* Write out the modified section contents. */ | |
73d074b4 | 7049 | if (bed->elf_backend_write_section |
f9f32305 | 7050 | && (*bed->elf_backend_write_section) (output_bfd, o, contents)) |
73d074b4 DJ |
7051 | { |
7052 | /* Section written out. */ | |
7053 | } | |
65765700 | 7054 | else switch (elf_section_data (o)->sec_info_type) |
f5fa8ca2 | 7055 | { |
65765700 | 7056 | case ELF_INFO_TYPE_STABS: |
f5fa8ca2 | 7057 | if (! (_bfd_write_section_stabs |
65765700 JJ |
7058 | (output_bfd, |
7059 | &elf_hash_table (finfo->info)->stab_info, | |
7060 | o, &elf_section_data (o)->sec_info, contents))) | |
f5fa8ca2 | 7061 | return false; |
65765700 JJ |
7062 | break; |
7063 | case ELF_INFO_TYPE_MERGE: | |
f5fa8ca2 | 7064 | if (! (_bfd_write_merged_section |
65765700 | 7065 | (output_bfd, o, elf_section_data (o)->sec_info))) |
252b5132 | 7066 | return false; |
65765700 JJ |
7067 | break; |
7068 | case ELF_INFO_TYPE_EH_FRAME: | |
7069 | { | |
7070 | asection *ehdrsec; | |
7071 | ||
7072 | ehdrsec | |
7073 | = bfd_get_section_by_name (elf_hash_table (finfo->info)->dynobj, | |
7074 | ".eh_frame_hdr"); | |
7075 | if (! (_bfd_elf_write_section_eh_frame (output_bfd, o, ehdrsec, | |
7076 | contents))) | |
7077 | return false; | |
7078 | } | |
7079 | break; | |
7080 | default: | |
7081 | { | |
7082 | bfd_size_type sec_size; | |
7083 | ||
7084 | sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size); | |
7085 | if (! (o->flags & SEC_EXCLUDE) | |
7086 | && ! bfd_set_section_contents (output_bfd, o->output_section, | |
7087 | contents, | |
7088 | (file_ptr) o->output_offset, | |
7089 | sec_size)) | |
7090 | return false; | |
7091 | } | |
7092 | break; | |
252b5132 RH |
7093 | } |
7094 | } | |
7095 | ||
7096 | return true; | |
7097 | } | |
7098 | ||
7099 | /* Generate a reloc when linking an ELF file. This is a reloc | |
7100 | requested by the linker, and does come from any input file. This | |
7101 | is used to build constructor and destructor tables when linking | |
7102 | with -Ur. */ | |
7103 | ||
7104 | static boolean | |
7105 | elf_reloc_link_order (output_bfd, info, output_section, link_order) | |
7106 | bfd *output_bfd; | |
7107 | struct bfd_link_info *info; | |
7108 | asection *output_section; | |
7109 | struct bfd_link_order *link_order; | |
7110 | { | |
7111 | reloc_howto_type *howto; | |
7112 | long indx; | |
7113 | bfd_vma offset; | |
7114 | bfd_vma addend; | |
7115 | struct elf_link_hash_entry **rel_hash_ptr; | |
7116 | Elf_Internal_Shdr *rel_hdr; | |
32f0787a | 7117 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
252b5132 RH |
7118 | |
7119 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
7120 | if (howto == NULL) | |
7121 | { | |
7122 | bfd_set_error (bfd_error_bad_value); | |
7123 | return false; | |
7124 | } | |
7125 | ||
7126 | addend = link_order->u.reloc.p->addend; | |
7127 | ||
7128 | /* Figure out the symbol index. */ | |
7129 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
31367b81 MM |
7130 | + elf_section_data (output_section)->rel_count |
7131 | + elf_section_data (output_section)->rel_count2); | |
252b5132 RH |
7132 | if (link_order->type == bfd_section_reloc_link_order) |
7133 | { | |
7134 | indx = link_order->u.reloc.p->u.section->target_index; | |
7135 | BFD_ASSERT (indx != 0); | |
7136 | *rel_hash_ptr = NULL; | |
7137 | } | |
7138 | else | |
7139 | { | |
7140 | struct elf_link_hash_entry *h; | |
7141 | ||
7142 | /* Treat a reloc against a defined symbol as though it were | |
c44233aa | 7143 | actually against the section. */ |
252b5132 RH |
7144 | h = ((struct elf_link_hash_entry *) |
7145 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
7146 | link_order->u.reloc.p->u.name, | |
7147 | false, false, true)); | |
7148 | if (h != NULL | |
7149 | && (h->root.type == bfd_link_hash_defined | |
7150 | || h->root.type == bfd_link_hash_defweak)) | |
7151 | { | |
7152 | asection *section; | |
7153 | ||
7154 | section = h->root.u.def.section; | |
7155 | indx = section->output_section->target_index; | |
7156 | *rel_hash_ptr = NULL; | |
7157 | /* It seems that we ought to add the symbol value to the | |
c44233aa AM |
7158 | addend here, but in practice it has already been added |
7159 | because it was passed to constructor_callback. */ | |
252b5132 RH |
7160 | addend += section->output_section->vma + section->output_offset; |
7161 | } | |
7162 | else if (h != NULL) | |
7163 | { | |
7164 | /* Setting the index to -2 tells elf_link_output_extsym that | |
7165 | this symbol is used by a reloc. */ | |
7166 | h->indx = -2; | |
7167 | *rel_hash_ptr = h; | |
7168 | indx = 0; | |
7169 | } | |
7170 | else | |
7171 | { | |
7172 | if (! ((*info->callbacks->unattached_reloc) | |
7173 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
7174 | (asection *) NULL, (bfd_vma) 0))) | |
7175 | return false; | |
7176 | indx = 0; | |
7177 | } | |
7178 | } | |
7179 | ||
7180 | /* If this is an inplace reloc, we must write the addend into the | |
7181 | object file. */ | |
7182 | if (howto->partial_inplace && addend != 0) | |
7183 | { | |
7184 | bfd_size_type size; | |
7185 | bfd_reloc_status_type rstat; | |
7186 | bfd_byte *buf; | |
7187 | boolean ok; | |
dc810e39 | 7188 | const char *sym_name; |
252b5132 RH |
7189 | |
7190 | size = bfd_get_reloc_size (howto); | |
7191 | buf = (bfd_byte *) bfd_zmalloc (size); | |
7192 | if (buf == (bfd_byte *) NULL) | |
7193 | return false; | |
dc810e39 | 7194 | rstat = _bfd_relocate_contents (howto, output_bfd, (bfd_vma) addend, buf); |
252b5132 RH |
7195 | switch (rstat) |
7196 | { | |
7197 | case bfd_reloc_ok: | |
7198 | break; | |
dc810e39 | 7199 | |
252b5132 RH |
7200 | default: |
7201 | case bfd_reloc_outofrange: | |
7202 | abort (); | |
dc810e39 | 7203 | |
252b5132 | 7204 | case bfd_reloc_overflow: |
dc810e39 AM |
7205 | if (link_order->type == bfd_section_reloc_link_order) |
7206 | sym_name = bfd_section_name (output_bfd, | |
7207 | link_order->u.reloc.p->u.section); | |
7208 | else | |
7209 | sym_name = link_order->u.reloc.p->u.name; | |
252b5132 | 7210 | if (! ((*info->callbacks->reloc_overflow) |
dc810e39 AM |
7211 | (info, sym_name, howto->name, addend, |
7212 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
252b5132 RH |
7213 | { |
7214 | free (buf); | |
7215 | return false; | |
7216 | } | |
7217 | break; | |
7218 | } | |
7219 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
7220 | (file_ptr) link_order->offset, size); | |
7221 | free (buf); | |
7222 | if (! ok) | |
7223 | return false; | |
7224 | } | |
7225 | ||
7226 | /* The address of a reloc is relative to the section in a | |
7227 | relocateable file, and is a virtual address in an executable | |
7228 | file. */ | |
7229 | offset = link_order->offset; | |
7230 | if (! info->relocateable) | |
7231 | offset += output_section->vma; | |
7232 | ||
7233 | rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
7234 | ||
7235 | if (rel_hdr->sh_type == SHT_REL) | |
7236 | { | |
dc810e39 | 7237 | bfd_size_type size; |
209f668e | 7238 | Elf_Internal_Rel *irel; |
252b5132 | 7239 | Elf_External_Rel *erel; |
4e8a9624 | 7240 | unsigned int i; |
dc810e39 AM |
7241 | |
7242 | size = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rel); | |
7243 | irel = (Elf_Internal_Rel *) bfd_zmalloc (size); | |
209f668e NC |
7244 | if (irel == NULL) |
7245 | return false; | |
dc810e39 | 7246 | |
209f668e NC |
7247 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
7248 | irel[i].r_offset = offset; | |
7249 | irel[0].r_info = ELF_R_INFO (indx, howto->type); | |
252b5132 | 7250 | |
252b5132 | 7251 | erel = ((Elf_External_Rel *) rel_hdr->contents |
0525d26e | 7252 | + elf_section_data (output_section)->rel_count); |
209f668e | 7253 | |
32f0787a | 7254 | if (bed->s->swap_reloc_out) |
209f668e | 7255 | (*bed->s->swap_reloc_out) (output_bfd, irel, (bfd_byte *) erel); |
32f0787a | 7256 | else |
209f668e NC |
7257 | elf_swap_reloc_out (output_bfd, irel, erel); |
7258 | ||
7259 | free (irel); | |
252b5132 RH |
7260 | } |
7261 | else | |
7262 | { | |
dc810e39 | 7263 | bfd_size_type size; |
209f668e | 7264 | Elf_Internal_Rela *irela; |
252b5132 | 7265 | Elf_External_Rela *erela; |
4e8a9624 | 7266 | unsigned int i; |
dc810e39 AM |
7267 | |
7268 | size = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
7269 | irela = (Elf_Internal_Rela *) bfd_zmalloc (size); | |
209f668e NC |
7270 | if (irela == NULL) |
7271 | return false; | |
7272 | ||
7273 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
7274 | irela[i].r_offset = offset; | |
7275 | irela[0].r_info = ELF_R_INFO (indx, howto->type); | |
7276 | irela[0].r_addend = addend; | |
252b5132 | 7277 | |
252b5132 | 7278 | erela = ((Elf_External_Rela *) rel_hdr->contents |
0525d26e | 7279 | + elf_section_data (output_section)->rel_count); |
209f668e | 7280 | |
32f0787a | 7281 | if (bed->s->swap_reloca_out) |
209f668e | 7282 | (*bed->s->swap_reloca_out) (output_bfd, irela, (bfd_byte *) erela); |
32f0787a | 7283 | else |
209f668e | 7284 | elf_swap_reloca_out (output_bfd, irela, erela); |
252b5132 RH |
7285 | } |
7286 | ||
0525d26e | 7287 | ++elf_section_data (output_section)->rel_count; |
252b5132 RH |
7288 | |
7289 | return true; | |
7290 | } | |
252b5132 RH |
7291 | \f |
7292 | /* Allocate a pointer to live in a linker created section. */ | |
7293 | ||
7294 | boolean | |
7295 | elf_create_pointer_linker_section (abfd, info, lsect, h, rel) | |
7296 | bfd *abfd; | |
7297 | struct bfd_link_info *info; | |
7298 | elf_linker_section_t *lsect; | |
7299 | struct elf_link_hash_entry *h; | |
7300 | const Elf_Internal_Rela *rel; | |
7301 | { | |
7302 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
7303 | elf_linker_section_pointers_t *linker_section_ptr; | |
dc810e39 AM |
7304 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7305 | bfd_size_type amt; | |
252b5132 RH |
7306 | |
7307 | BFD_ASSERT (lsect != NULL); | |
7308 | ||
a7b97311 | 7309 | /* Is this a global symbol? */ |
252b5132 RH |
7310 | if (h != NULL) |
7311 | { | |
a7b97311 | 7312 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7313 | if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer, |
7314 | rel->r_addend, | |
7315 | lsect->which)) | |
7316 | return true; | |
7317 | ||
7318 | ptr_linker_section_ptr = &h->linker_section_pointer; | |
7319 | /* Make sure this symbol is output as a dynamic symbol. */ | |
7320 | if (h->dynindx == -1) | |
7321 | { | |
7322 | if (! elf_link_record_dynamic_symbol (info, h)) | |
7323 | return false; | |
7324 | } | |
7325 | ||
7326 | if (lsect->rel_section) | |
7327 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7328 | } | |
a7b97311 | 7329 | else |
252b5132 | 7330 | { |
a7b97311 | 7331 | /* Allocation of a pointer to a local symbol. */ |
252b5132 RH |
7332 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
7333 | ||
a7b97311 | 7334 | /* Allocate a table to hold the local symbols if first time. */ |
252b5132 RH |
7335 | if (!ptr) |
7336 | { | |
7337 | unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; | |
7338 | register unsigned int i; | |
7339 | ||
dc810e39 AM |
7340 | amt = num_symbols; |
7341 | amt *= sizeof (elf_linker_section_pointers_t *); | |
7342 | ptr = (elf_linker_section_pointers_t **) bfd_alloc (abfd, amt); | |
252b5132 RH |
7343 | |
7344 | if (!ptr) | |
7345 | return false; | |
7346 | ||
7347 | elf_local_ptr_offsets (abfd) = ptr; | |
7348 | for (i = 0; i < num_symbols; i++) | |
a7b97311 | 7349 | ptr[i] = (elf_linker_section_pointers_t *) 0; |
252b5132 RH |
7350 | } |
7351 | ||
a7b97311 | 7352 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7353 | if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx], |
7354 | rel->r_addend, | |
7355 | lsect->which)) | |
7356 | return true; | |
7357 | ||
7358 | ptr_linker_section_ptr = &ptr[r_symndx]; | |
7359 | ||
7360 | if (info->shared) | |
7361 | { | |
7362 | /* If we are generating a shared object, we need to | |
7363 | output a R_<xxx>_RELATIVE reloc so that the | |
7364 | dynamic linker can adjust this GOT entry. */ | |
7365 | BFD_ASSERT (lsect->rel_section != NULL); | |
7366 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7367 | } | |
7368 | } | |
7369 | ||
a7b97311 AM |
7370 | /* Allocate space for a pointer in the linker section, and allocate |
7371 | a new pointer record from internal memory. */ | |
252b5132 | 7372 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
dc810e39 AM |
7373 | amt = sizeof (elf_linker_section_pointers_t); |
7374 | linker_section_ptr = (elf_linker_section_pointers_t *) bfd_alloc (abfd, amt); | |
252b5132 RH |
7375 | |
7376 | if (!linker_section_ptr) | |
7377 | return false; | |
7378 | ||
7379 | linker_section_ptr->next = *ptr_linker_section_ptr; | |
7380 | linker_section_ptr->addend = rel->r_addend; | |
7381 | linker_section_ptr->which = lsect->which; | |
7382 | linker_section_ptr->written_address_p = false; | |
7383 | *ptr_linker_section_ptr = linker_section_ptr; | |
7384 | ||
7385 | #if 0 | |
7386 | if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset) | |
7387 | { | |
a7b97311 AM |
7388 | linker_section_ptr->offset = (lsect->section->_raw_size |
7389 | - lsect->hole_size + (ARCH_SIZE / 8)); | |
252b5132 RH |
7390 | lsect->hole_offset += ARCH_SIZE / 8; |
7391 | lsect->sym_offset += ARCH_SIZE / 8; | |
a7b97311 | 7392 | if (lsect->sym_hash) |
252b5132 | 7393 | { |
a7b97311 | 7394 | /* Bump up symbol value if needed. */ |
252b5132 RH |
7395 | lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8; |
7396 | #ifdef DEBUG | |
7397 | fprintf (stderr, "Bump up %s by %ld, current value = %ld\n", | |
7398 | lsect->sym_hash->root.root.string, | |
a7b97311 AM |
7399 | (long) ARCH_SIZE / 8, |
7400 | (long) lsect->sym_hash->root.u.def.value); | |
252b5132 RH |
7401 | #endif |
7402 | } | |
7403 | } | |
7404 | else | |
7405 | #endif | |
7406 | linker_section_ptr->offset = lsect->section->_raw_size; | |
7407 | ||
7408 | lsect->section->_raw_size += ARCH_SIZE / 8; | |
7409 | ||
7410 | #ifdef DEBUG | |
a7b97311 AM |
7411 | fprintf (stderr, |
7412 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
7413 | lsect->name, (long) linker_section_ptr->offset, | |
7414 | (long) lsect->section->_raw_size); | |
252b5132 RH |
7415 | #endif |
7416 | ||
7417 | return true; | |
7418 | } | |
252b5132 RH |
7419 | \f |
7420 | #if ARCH_SIZE==64 | |
7421 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR) | |
7422 | #endif | |
7423 | #if ARCH_SIZE==32 | |
7424 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR) | |
7425 | #endif | |
7426 | ||
209f668e | 7427 | /* Fill in the address for a pointer generated in a linker section. */ |
252b5132 RH |
7428 | |
7429 | bfd_vma | |
a7b97311 AM |
7430 | elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, |
7431 | relocation, rel, relative_reloc) | |
252b5132 RH |
7432 | bfd *output_bfd; |
7433 | bfd *input_bfd; | |
7434 | struct bfd_link_info *info; | |
7435 | elf_linker_section_t *lsect; | |
7436 | struct elf_link_hash_entry *h; | |
7437 | bfd_vma relocation; | |
7438 | const Elf_Internal_Rela *rel; | |
7439 | int relative_reloc; | |
7440 | { | |
7441 | elf_linker_section_pointers_t *linker_section_ptr; | |
7442 | ||
7443 | BFD_ASSERT (lsect != NULL); | |
7444 | ||
a7b97311 | 7445 | if (h != NULL) |
252b5132 | 7446 | { |
a7b97311 AM |
7447 | /* Handle global symbol. */ |
7448 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section | |
7449 | (h->linker_section_pointer, | |
7450 | rel->r_addend, | |
7451 | lsect->which)); | |
252b5132 RH |
7452 | |
7453 | BFD_ASSERT (linker_section_ptr != NULL); | |
7454 | ||
7455 | if (! elf_hash_table (info)->dynamic_sections_created | |
7456 | || (info->shared | |
7457 | && info->symbolic | |
7458 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
7459 | { | |
7460 | /* This is actually a static link, or it is a | |
7461 | -Bsymbolic link and the symbol is defined | |
7462 | locally. We must initialize this entry in the | |
7463 | global section. | |
7464 | ||
7465 | When doing a dynamic link, we create a .rela.<xxx> | |
7466 | relocation entry to initialize the value. This | |
7467 | is done in the finish_dynamic_symbol routine. */ | |
7468 | if (!linker_section_ptr->written_address_p) | |
7469 | { | |
7470 | linker_section_ptr->written_address_p = true; | |
a7b97311 AM |
7471 | bfd_put_ptr (output_bfd, |
7472 | relocation + linker_section_ptr->addend, | |
7473 | (lsect->section->contents | |
7474 | + linker_section_ptr->offset)); | |
252b5132 RH |
7475 | } |
7476 | } | |
7477 | } | |
a7b97311 | 7478 | else |
252b5132 | 7479 | { |
a7b97311 | 7480 | /* Handle local symbol. */ |
252b5132 RH |
7481 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7482 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); | |
7483 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); | |
a7b97311 AM |
7484 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section |
7485 | (elf_local_ptr_offsets (input_bfd)[r_symndx], | |
7486 | rel->r_addend, | |
7487 | lsect->which)); | |
252b5132 RH |
7488 | |
7489 | BFD_ASSERT (linker_section_ptr != NULL); | |
7490 | ||
a7b97311 | 7491 | /* Write out pointer if it hasn't been rewritten out before. */ |
252b5132 RH |
7492 | if (!linker_section_ptr->written_address_p) |
7493 | { | |
7494 | linker_section_ptr->written_address_p = true; | |
7495 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, | |
7496 | lsect->section->contents + linker_section_ptr->offset); | |
7497 | ||
7498 | if (info->shared) | |
7499 | { | |
7500 | asection *srel = lsect->rel_section; | |
209f668e | 7501 | Elf_Internal_Rela *outrel; |
dc810e39 | 7502 | Elf_External_Rela *erel; |
209f668e NC |
7503 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
7504 | unsigned int i; | |
dc810e39 | 7505 | bfd_size_type amt; |
209f668e | 7506 | |
dc810e39 AM |
7507 | amt = sizeof (Elf_Internal_Rela) * bed->s->int_rels_per_ext_rel; |
7508 | outrel = (Elf_Internal_Rela *) bfd_zmalloc (amt); | |
209f668e NC |
7509 | if (outrel == NULL) |
7510 | { | |
7511 | (*_bfd_error_handler) (_("Error: out of memory")); | |
7512 | return 0; | |
7513 | } | |
252b5132 | 7514 | |
a7b97311 AM |
7515 | /* We need to generate a relative reloc for the dynamic |
7516 | linker. */ | |
252b5132 | 7517 | if (!srel) |
a7b97311 AM |
7518 | { |
7519 | srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
7520 | lsect->rel_name); | |
7521 | lsect->rel_section = srel; | |
7522 | } | |
252b5132 RH |
7523 | |
7524 | BFD_ASSERT (srel != NULL); | |
7525 | ||
209f668e NC |
7526 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
7527 | outrel[i].r_offset = (lsect->section->output_section->vma | |
7528 | + lsect->section->output_offset | |
7529 | + linker_section_ptr->offset); | |
7530 | outrel[0].r_info = ELF_R_INFO (0, relative_reloc); | |
7531 | outrel[0].r_addend = 0; | |
dc810e39 AM |
7532 | erel = (Elf_External_Rela *) lsect->section->contents; |
7533 | erel += elf_section_data (lsect->section)->rel_count; | |
7534 | elf_swap_reloca_out (output_bfd, outrel, erel); | |
0525d26e | 7535 | ++elf_section_data (lsect->section)->rel_count; |
dc810e39 | 7536 | |
209f668e | 7537 | free (outrel); |
252b5132 RH |
7538 | } |
7539 | } | |
7540 | } | |
7541 | ||
7542 | relocation = (lsect->section->output_offset | |
7543 | + linker_section_ptr->offset | |
7544 | - lsect->hole_offset | |
7545 | - lsect->sym_offset); | |
7546 | ||
7547 | #ifdef DEBUG | |
a7b97311 AM |
7548 | fprintf (stderr, |
7549 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
7550 | lsect->name, (long) relocation, (long) relocation); | |
252b5132 RH |
7551 | #endif |
7552 | ||
7553 | /* Subtract out the addend, because it will get added back in by the normal | |
7554 | processing. */ | |
7555 | return relocation - linker_section_ptr->addend; | |
7556 | } | |
7557 | \f | |
7558 | /* Garbage collect unused sections. */ | |
7559 | ||
7560 | static boolean elf_gc_mark | |
58821868 AM |
7561 | PARAMS ((struct bfd_link_info *, asection *, |
7562 | asection * (*) (asection *, struct bfd_link_info *, | |
7563 | Elf_Internal_Rela *, struct elf_link_hash_entry *, | |
7564 | Elf_Internal_Sym *))); | |
252b5132 RH |
7565 | |
7566 | static boolean elf_gc_sweep | |
58821868 AM |
7567 | PARAMS ((struct bfd_link_info *, |
7568 | boolean (*) (bfd *, struct bfd_link_info *, asection *, | |
7569 | const Elf_Internal_Rela *))); | |
252b5132 RH |
7570 | |
7571 | static boolean elf_gc_sweep_symbol | |
58821868 | 7572 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 RH |
7573 | |
7574 | static boolean elf_gc_allocate_got_offsets | |
58821868 | 7575 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 RH |
7576 | |
7577 | static boolean elf_gc_propagate_vtable_entries_used | |
58821868 | 7578 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 RH |
7579 | |
7580 | static boolean elf_gc_smash_unused_vtentry_relocs | |
58821868 | 7581 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 RH |
7582 | |
7583 | /* The mark phase of garbage collection. For a given section, mark | |
dbb410c3 AM |
7584 | it and any sections in this section's group, and all the sections |
7585 | which define symbols to which it refers. */ | |
252b5132 RH |
7586 | |
7587 | static boolean | |
7588 | elf_gc_mark (info, sec, gc_mark_hook) | |
7589 | struct bfd_link_info *info; | |
7590 | asection *sec; | |
58821868 AM |
7591 | asection * (*gc_mark_hook) PARAMS ((asection *, struct bfd_link_info *, |
7592 | Elf_Internal_Rela *, | |
7593 | struct elf_link_hash_entry *, | |
7594 | Elf_Internal_Sym *)); | |
252b5132 | 7595 | { |
dbb410c3 AM |
7596 | boolean ret; |
7597 | asection *group_sec; | |
252b5132 RH |
7598 | |
7599 | sec->gc_mark = 1; | |
7600 | ||
dbb410c3 AM |
7601 | /* Mark all the sections in the group. */ |
7602 | group_sec = elf_section_data (sec)->next_in_group; | |
7603 | if (group_sec && !group_sec->gc_mark) | |
7604 | if (!elf_gc_mark (info, group_sec, gc_mark_hook)) | |
7605 | return false; | |
252b5132 | 7606 | |
dbb410c3 AM |
7607 | /* Look through the section relocs. */ |
7608 | ret = true; | |
252b5132 RH |
7609 | if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0) |
7610 | { | |
7611 | Elf_Internal_Rela *relstart, *rel, *relend; | |
7612 | Elf_Internal_Shdr *symtab_hdr; | |
7613 | struct elf_link_hash_entry **sym_hashes; | |
7614 | size_t nlocsyms; | |
7615 | size_t extsymoff; | |
252b5132 | 7616 | bfd *input_bfd = sec->owner; |
c7ac6ff8 | 7617 | struct elf_backend_data *bed = get_elf_backend_data (input_bfd); |
6cdc0ccc | 7618 | Elf_Internal_Sym *isym = NULL; |
252b5132 RH |
7619 | |
7620 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
7621 | sym_hashes = elf_sym_hashes (input_bfd); | |
7622 | ||
7623 | /* Read the local symbols. */ | |
7624 | if (elf_bad_symtab (input_bfd)) | |
7625 | { | |
7626 | nlocsyms = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
c44233aa | 7627 | extsymoff = 0; |
252b5132 RH |
7628 | } |
7629 | else | |
7630 | extsymoff = nlocsyms = symtab_hdr->sh_info; | |
9ad5cbcf | 7631 | |
6cdc0ccc AM |
7632 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
7633 | if (isym == NULL && nlocsyms != 0) | |
9ad5cbcf | 7634 | { |
6cdc0ccc AM |
7635 | isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0, |
7636 | NULL, NULL, NULL); | |
7637 | if (isym == NULL) | |
9ad5cbcf AM |
7638 | return false; |
7639 | } | |
7640 | ||
252b5132 RH |
7641 | /* Read the relocations. */ |
7642 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
6cdc0ccc | 7643 | (input_bfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
252b5132 RH |
7644 | info->keep_memory)); |
7645 | if (relstart == NULL) | |
7646 | { | |
7647 | ret = false; | |
7648 | goto out1; | |
7649 | } | |
c7ac6ff8 | 7650 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7651 | |
7652 | for (rel = relstart; rel < relend; rel++) | |
7653 | { | |
7654 | unsigned long r_symndx; | |
7655 | asection *rsec; | |
7656 | struct elf_link_hash_entry *h; | |
252b5132 RH |
7657 | |
7658 | r_symndx = ELF_R_SYM (rel->r_info); | |
7659 | if (r_symndx == 0) | |
7660 | continue; | |
7661 | ||
6cdc0ccc AM |
7662 | if (r_symndx >= nlocsyms |
7663 | || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL) | |
252b5132 RH |
7664 | { |
7665 | h = sym_hashes[r_symndx - extsymoff]; | |
1e2f5b6e | 7666 | rsec = (*gc_mark_hook) (sec, info, rel, h, NULL); |
252b5132 RH |
7667 | } |
7668 | else | |
7669 | { | |
6cdc0ccc | 7670 | rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]); |
252b5132 RH |
7671 | } |
7672 | ||
7673 | if (rsec && !rsec->gc_mark) | |
b91afed7 AM |
7674 | { |
7675 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
7676 | rsec->gc_mark = 1; | |
7677 | else if (!elf_gc_mark (info, rsec, gc_mark_hook)) | |
7678 | { | |
7679 | ret = false; | |
7680 | goto out2; | |
7681 | } | |
7682 | } | |
252b5132 RH |
7683 | } |
7684 | ||
7685 | out2: | |
6cdc0ccc | 7686 | if (elf_section_data (sec)->relocs != relstart) |
252b5132 RH |
7687 | free (relstart); |
7688 | out1: | |
6cdc0ccc AM |
7689 | if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym) |
7690 | { | |
7691 | if (! info->keep_memory) | |
7692 | free (isym); | |
7693 | else | |
7694 | symtab_hdr->contents = (unsigned char *) isym; | |
7695 | } | |
252b5132 RH |
7696 | } |
7697 | ||
7698 | return ret; | |
7699 | } | |
7700 | ||
7701 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
7702 | ||
7703 | static boolean | |
7704 | elf_gc_sweep (info, gc_sweep_hook) | |
7705 | struct bfd_link_info *info; | |
58821868 AM |
7706 | boolean (*gc_sweep_hook) PARAMS ((bfd *, struct bfd_link_info *, |
7707 | asection *, const Elf_Internal_Rela *)); | |
252b5132 RH |
7708 | { |
7709 | bfd *sub; | |
7710 | ||
7711 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7712 | { | |
7713 | asection *o; | |
7714 | ||
f6af82bd AM |
7715 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) |
7716 | continue; | |
7717 | ||
252b5132 RH |
7718 | for (o = sub->sections; o != NULL; o = o->next) |
7719 | { | |
7720 | /* Keep special sections. Keep .debug sections. */ | |
7721 | if ((o->flags & SEC_LINKER_CREATED) | |
7722 | || (o->flags & SEC_DEBUGGING)) | |
7723 | o->gc_mark = 1; | |
7724 | ||
7725 | if (o->gc_mark) | |
7726 | continue; | |
7727 | ||
7728 | /* Skip sweeping sections already excluded. */ | |
7729 | if (o->flags & SEC_EXCLUDE) | |
7730 | continue; | |
7731 | ||
7732 | /* Since this is early in the link process, it is simple | |
7733 | to remove a section from the output. */ | |
7734 | o->flags |= SEC_EXCLUDE; | |
7735 | ||
7736 | /* But we also have to update some of the relocation | |
7737 | info we collected before. */ | |
7738 | if (gc_sweep_hook | |
7739 | && (o->flags & SEC_RELOC) && o->reloc_count > 0) | |
7740 | { | |
7741 | Elf_Internal_Rela *internal_relocs; | |
7742 | boolean r; | |
7743 | ||
7744 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
7745 | (o->owner, o, NULL, NULL, info->keep_memory)); | |
7746 | if (internal_relocs == NULL) | |
7747 | return false; | |
7748 | ||
3e932841 | 7749 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
252b5132 | 7750 | |
6cdc0ccc | 7751 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
7752 | free (internal_relocs); |
7753 | ||
7754 | if (!r) | |
7755 | return false; | |
7756 | } | |
7757 | } | |
7758 | } | |
7759 | ||
7760 | /* Remove the symbols that were in the swept sections from the dynamic | |
7761 | symbol table. GCFIXME: Anyone know how to get them out of the | |
7762 | static symbol table as well? */ | |
7763 | { | |
7764 | int i = 0; | |
7765 | ||
7766 | elf_link_hash_traverse (elf_hash_table (info), | |
7767 | elf_gc_sweep_symbol, | |
7768 | (PTR) &i); | |
7769 | ||
7770 | elf_hash_table (info)->dynsymcount = i; | |
7771 | } | |
7772 | ||
7773 | return true; | |
7774 | } | |
7775 | ||
7776 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
7777 | ||
7778 | static boolean | |
7779 | elf_gc_sweep_symbol (h, idxptr) | |
7780 | struct elf_link_hash_entry *h; | |
7781 | PTR idxptr; | |
7782 | { | |
7783 | int *idx = (int *) idxptr; | |
7784 | ||
e92d460e AM |
7785 | if (h->root.type == bfd_link_hash_warning) |
7786 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7787 | ||
252b5132 RH |
7788 | if (h->dynindx != -1 |
7789 | && ((h->root.type != bfd_link_hash_defined | |
7790 | && h->root.type != bfd_link_hash_defweak) | |
7791 | || h->root.u.def.section->gc_mark)) | |
7792 | h->dynindx = (*idx)++; | |
7793 | ||
7794 | return true; | |
7795 | } | |
7796 | ||
7797 | /* Propogate collected vtable information. This is called through | |
7798 | elf_link_hash_traverse. */ | |
7799 | ||
7800 | static boolean | |
7801 | elf_gc_propagate_vtable_entries_used (h, okp) | |
7802 | struct elf_link_hash_entry *h; | |
7803 | PTR okp; | |
7804 | { | |
e92d460e AM |
7805 | if (h->root.type == bfd_link_hash_warning) |
7806 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7807 | ||
3e932841 | 7808 | /* Those that are not vtables. */ |
252b5132 RH |
7809 | if (h->vtable_parent == NULL) |
7810 | return true; | |
7811 | ||
7812 | /* Those vtables that do not have parents, we cannot merge. */ | |
7813 | if (h->vtable_parent == (struct elf_link_hash_entry *) -1) | |
7814 | return true; | |
7815 | ||
7816 | /* If we've already been done, exit. */ | |
7817 | if (h->vtable_entries_used && h->vtable_entries_used[-1]) | |
7818 | return true; | |
7819 | ||
7820 | /* Make sure the parent's table is up to date. */ | |
7821 | elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp); | |
7822 | ||
7823 | if (h->vtable_entries_used == NULL) | |
7824 | { | |
7825 | /* None of this table's entries were referenced. Re-use the | |
7826 | parent's table. */ | |
7827 | h->vtable_entries_used = h->vtable_parent->vtable_entries_used; | |
7828 | h->vtable_entries_size = h->vtable_parent->vtable_entries_size; | |
7829 | } | |
7830 | else | |
7831 | { | |
7832 | size_t n; | |
7833 | boolean *cu, *pu; | |
7834 | ||
7835 | /* Or the parent's entries into ours. */ | |
7836 | cu = h->vtable_entries_used; | |
7837 | cu[-1] = true; | |
7838 | pu = h->vtable_parent->vtable_entries_used; | |
7839 | if (pu != NULL) | |
7840 | { | |
c44233aa AM |
7841 | asection *sec = h->root.u.def.section; |
7842 | struct elf_backend_data *bed = get_elf_backend_data (sec->owner); | |
7843 | int file_align = bed->s->file_align; | |
0d1ea5c0 CM |
7844 | |
7845 | n = h->vtable_parent->vtable_entries_size / file_align; | |
374b596d | 7846 | while (n--) |
252b5132 | 7847 | { |
374b596d NC |
7848 | if (*pu) |
7849 | *cu = true; | |
7850 | pu++; | |
7851 | cu++; | |
252b5132 RH |
7852 | } |
7853 | } | |
7854 | } | |
7855 | ||
7856 | return true; | |
7857 | } | |
7858 | ||
7859 | static boolean | |
7860 | elf_gc_smash_unused_vtentry_relocs (h, okp) | |
7861 | struct elf_link_hash_entry *h; | |
7862 | PTR okp; | |
7863 | { | |
7864 | asection *sec; | |
7865 | bfd_vma hstart, hend; | |
7866 | Elf_Internal_Rela *relstart, *relend, *rel; | |
c7ac6ff8 | 7867 | struct elf_backend_data *bed; |
0d1ea5c0 | 7868 | int file_align; |
252b5132 | 7869 | |
e92d460e AM |
7870 | if (h->root.type == bfd_link_hash_warning) |
7871 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7872 | ||
252b5132 RH |
7873 | /* Take care of both those symbols that do not describe vtables as |
7874 | well as those that are not loaded. */ | |
7875 | if (h->vtable_parent == NULL) | |
7876 | return true; | |
7877 | ||
7878 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
7879 | || h->root.type == bfd_link_hash_defweak); | |
7880 | ||
7881 | sec = h->root.u.def.section; | |
7882 | hstart = h->root.u.def.value; | |
7883 | hend = hstart + h->size; | |
7884 | ||
7885 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
7886 | (sec->owner, sec, NULL, (Elf_Internal_Rela *) NULL, true)); | |
7887 | if (!relstart) | |
a7b97311 | 7888 | return *(boolean *) okp = false; |
c7ac6ff8 | 7889 | bed = get_elf_backend_data (sec->owner); |
0d1ea5c0 CM |
7890 | file_align = bed->s->file_align; |
7891 | ||
c7ac6ff8 | 7892 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7893 | |
7894 | for (rel = relstart; rel < relend; ++rel) | |
7895 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
7896 | { | |
7897 | /* If the entry is in use, do nothing. */ | |
7898 | if (h->vtable_entries_used | |
7899 | && (rel->r_offset - hstart) < h->vtable_entries_size) | |
7900 | { | |
0d1ea5c0 | 7901 | bfd_vma entry = (rel->r_offset - hstart) / file_align; |
252b5132 RH |
7902 | if (h->vtable_entries_used[entry]) |
7903 | continue; | |
7904 | } | |
7905 | /* Otherwise, kill it. */ | |
7906 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
7907 | } | |
7908 | ||
7909 | return true; | |
7910 | } | |
7911 | ||
7912 | /* Do mark and sweep of unused sections. */ | |
7913 | ||
7914 | boolean | |
7915 | elf_gc_sections (abfd, info) | |
7916 | bfd *abfd; | |
7917 | struct bfd_link_info *info; | |
7918 | { | |
7919 | boolean ok = true; | |
7920 | bfd *sub; | |
7921 | asection * (*gc_mark_hook) | |
1e2f5b6e | 7922 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
c44233aa | 7923 | struct elf_link_hash_entry *h, Elf_Internal_Sym *)); |
252b5132 RH |
7924 | |
7925 | if (!get_elf_backend_data (abfd)->can_gc_sections | |
6d3e950b | 7926 | || info->relocateable || info->emitrelocations |
252b5132 RH |
7927 | || elf_hash_table (info)->dynamic_sections_created) |
7928 | return true; | |
7929 | ||
7930 | /* Apply transitive closure to the vtable entry usage info. */ | |
7931 | elf_link_hash_traverse (elf_hash_table (info), | |
7932 | elf_gc_propagate_vtable_entries_used, | |
7933 | (PTR) &ok); | |
7934 | if (!ok) | |
7935 | return false; | |
7936 | ||
7937 | /* Kill the vtable relocations that were not used. */ | |
7938 | elf_link_hash_traverse (elf_hash_table (info), | |
7939 | elf_gc_smash_unused_vtentry_relocs, | |
7940 | (PTR) &ok); | |
7941 | if (!ok) | |
7942 | return false; | |
7943 | ||
7944 | /* Grovel through relocs to find out who stays ... */ | |
7945 | ||
7946 | gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook; | |
7947 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7948 | { | |
7949 | asection *o; | |
f6af82bd AM |
7950 | |
7951 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
7952 | continue; | |
7953 | ||
252b5132 RH |
7954 | for (o = sub->sections; o != NULL; o = o->next) |
7955 | { | |
7956 | if (o->flags & SEC_KEEP) | |
c44233aa | 7957 | if (!elf_gc_mark (info, o, gc_mark_hook)) |
252b5132 RH |
7958 | return false; |
7959 | } | |
7960 | } | |
7961 | ||
7962 | /* ... and mark SEC_EXCLUDE for those that go. */ | |
a7b97311 | 7963 | if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook)) |
252b5132 RH |
7964 | return false; |
7965 | ||
7966 | return true; | |
7967 | } | |
7968 | \f | |
7969 | /* Called from check_relocs to record the existance of a VTINHERIT reloc. */ | |
7970 | ||
7971 | boolean | |
7972 | elf_gc_record_vtinherit (abfd, sec, h, offset) | |
7973 | bfd *abfd; | |
7974 | asection *sec; | |
7975 | struct elf_link_hash_entry *h; | |
7976 | bfd_vma offset; | |
7977 | { | |
7978 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
7979 | struct elf_link_hash_entry **search, *child; | |
7980 | bfd_size_type extsymcount; | |
7981 | ||
7982 | /* The sh_info field of the symtab header tells us where the | |
7983 | external symbols start. We don't care about the local symbols at | |
7984 | this point. */ | |
7985 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size/sizeof (Elf_External_Sym); | |
7986 | if (!elf_bad_symtab (abfd)) | |
7987 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
7988 | ||
7989 | sym_hashes = elf_sym_hashes (abfd); | |
7990 | sym_hashes_end = sym_hashes + extsymcount; | |
7991 | ||
7992 | /* Hunt down the child symbol, which is in this section at the same | |
7993 | offset as the relocation. */ | |
7994 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
7995 | { | |
7996 | if ((child = *search) != NULL | |
7997 | && (child->root.type == bfd_link_hash_defined | |
7998 | || child->root.type == bfd_link_hash_defweak) | |
7999 | && child->root.u.def.section == sec | |
8000 | && child->root.u.def.value == offset) | |
8001 | goto win; | |
8002 | } | |
8003 | ||
8004 | (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT", | |
8f615d07 | 8005 | bfd_archive_filename (abfd), sec->name, |
a7b97311 | 8006 | (unsigned long) offset); |
252b5132 RH |
8007 | bfd_set_error (bfd_error_invalid_operation); |
8008 | return false; | |
8009 | ||
dc810e39 | 8010 | win: |
252b5132 RH |
8011 | if (!h) |
8012 | { | |
8013 | /* This *should* only be the absolute section. It could potentially | |
8014 | be that someone has defined a non-global vtable though, which | |
8015 | would be bad. It isn't worth paging in the local symbols to be | |
8016 | sure though; that case should simply be handled by the assembler. */ | |
8017 | ||
8018 | child->vtable_parent = (struct elf_link_hash_entry *) -1; | |
8019 | } | |
8020 | else | |
8021 | child->vtable_parent = h; | |
8022 | ||
8023 | return true; | |
8024 | } | |
8025 | ||
8026 | /* Called from check_relocs to record the existance of a VTENTRY reloc. */ | |
8027 | ||
8028 | boolean | |
8029 | elf_gc_record_vtentry (abfd, sec, h, addend) | |
7442e600 ILT |
8030 | bfd *abfd ATTRIBUTE_UNUSED; |
8031 | asection *sec ATTRIBUTE_UNUSED; | |
252b5132 RH |
8032 | struct elf_link_hash_entry *h; |
8033 | bfd_vma addend; | |
8034 | { | |
0d1ea5c0 CM |
8035 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
8036 | int file_align = bed->s->file_align; | |
8037 | ||
252b5132 RH |
8038 | if (addend >= h->vtable_entries_size) |
8039 | { | |
8040 | size_t size, bytes; | |
8041 | boolean *ptr = h->vtable_entries_used; | |
8042 | ||
8043 | /* While the symbol is undefined, we have to be prepared to handle | |
8044 | a zero size. */ | |
8045 | if (h->root.type == bfd_link_hash_undefined) | |
8046 | size = addend; | |
8047 | else | |
8048 | { | |
8049 | size = h->size; | |
8050 | if (size < addend) | |
8051 | { | |
8052 | /* Oops! We've got a reference past the defined end of | |
8053 | the table. This is probably a bug -- shall we warn? */ | |
8054 | size = addend; | |
8055 | } | |
8056 | } | |
8057 | ||
8058 | /* Allocate one extra entry for use as a "done" flag for the | |
8059 | consolidation pass. */ | |
0d1ea5c0 | 8060 | bytes = (size / file_align + 1) * sizeof (boolean); |
252b5132 RH |
8061 | |
8062 | if (ptr) | |
8063 | { | |
dc810e39 | 8064 | ptr = bfd_realloc (ptr - 1, (bfd_size_type) bytes); |
3e932841 | 8065 | |
fed79cc6 NC |
8066 | if (ptr != NULL) |
8067 | { | |
8068 | size_t oldbytes; | |
252b5132 | 8069 | |
a7b97311 AM |
8070 | oldbytes = ((h->vtable_entries_size / file_align + 1) |
8071 | * sizeof (boolean)); | |
8072 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
fed79cc6 | 8073 | } |
252b5132 RH |
8074 | } |
8075 | else | |
dc810e39 | 8076 | ptr = bfd_zmalloc ((bfd_size_type) bytes); |
252b5132 | 8077 | |
fed79cc6 NC |
8078 | if (ptr == NULL) |
8079 | return false; | |
3e932841 | 8080 | |
252b5132 | 8081 | /* And arrange for that done flag to be at index -1. */ |
fed79cc6 | 8082 | h->vtable_entries_used = ptr + 1; |
252b5132 RH |
8083 | h->vtable_entries_size = size; |
8084 | } | |
3e932841 | 8085 | |
0d1ea5c0 | 8086 | h->vtable_entries_used[addend / file_align] = true; |
252b5132 RH |
8087 | |
8088 | return true; | |
8089 | } | |
8090 | ||
8091 | /* And an accompanying bit to work out final got entry offsets once | |
8092 | we're done. Should be called from final_link. */ | |
8093 | ||
8094 | boolean | |
8095 | elf_gc_common_finalize_got_offsets (abfd, info) | |
8096 | bfd *abfd; | |
8097 | struct bfd_link_info *info; | |
8098 | { | |
8099 | bfd *i; | |
8100 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8101 | bfd_vma gotoff; | |
8102 | ||
8103 | /* The GOT offset is relative to the .got section, but the GOT header is | |
8104 | put into the .got.plt section, if the backend uses it. */ | |
8105 | if (bed->want_got_plt) | |
8106 | gotoff = 0; | |
8107 | else | |
8108 | gotoff = bed->got_header_size; | |
8109 | ||
8110 | /* Do the local .got entries first. */ | |
8111 | for (i = info->input_bfds; i; i = i->link_next) | |
8112 | { | |
f6af82bd | 8113 | bfd_signed_vma *local_got; |
252b5132 RH |
8114 | bfd_size_type j, locsymcount; |
8115 | Elf_Internal_Shdr *symtab_hdr; | |
8116 | ||
f6af82bd AM |
8117 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
8118 | continue; | |
8119 | ||
8120 | local_got = elf_local_got_refcounts (i); | |
252b5132 RH |
8121 | if (!local_got) |
8122 | continue; | |
8123 | ||
8124 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
8125 | if (elf_bad_symtab (i)) | |
8126 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
8127 | else | |
8128 | locsymcount = symtab_hdr->sh_info; | |
8129 | ||
8130 | for (j = 0; j < locsymcount; ++j) | |
8131 | { | |
8132 | if (local_got[j] > 0) | |
8133 | { | |
8134 | local_got[j] = gotoff; | |
8135 | gotoff += ARCH_SIZE / 8; | |
8136 | } | |
8137 | else | |
8138 | local_got[j] = (bfd_vma) -1; | |
8139 | } | |
8140 | } | |
8141 | ||
dd5724d5 AM |
8142 | /* Then the global .got entries. .plt refcounts are handled by |
8143 | adjust_dynamic_symbol */ | |
252b5132 RH |
8144 | elf_link_hash_traverse (elf_hash_table (info), |
8145 | elf_gc_allocate_got_offsets, | |
8146 | (PTR) &gotoff); | |
8147 | return true; | |
8148 | } | |
8149 | ||
8150 | /* We need a special top-level link routine to convert got reference counts | |
8151 | to real got offsets. */ | |
8152 | ||
8153 | static boolean | |
8154 | elf_gc_allocate_got_offsets (h, offarg) | |
8155 | struct elf_link_hash_entry *h; | |
8156 | PTR offarg; | |
8157 | { | |
8158 | bfd_vma *off = (bfd_vma *) offarg; | |
8159 | ||
e92d460e AM |
8160 | if (h->root.type == bfd_link_hash_warning) |
8161 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8162 | ||
252b5132 RH |
8163 | if (h->got.refcount > 0) |
8164 | { | |
8165 | h->got.offset = off[0]; | |
8166 | off[0] += ARCH_SIZE / 8; | |
8167 | } | |
8168 | else | |
8169 | h->got.offset = (bfd_vma) -1; | |
8170 | ||
8171 | return true; | |
8172 | } | |
8173 | ||
8174 | /* Many folk need no more in the way of final link than this, once | |
8175 | got entry reference counting is enabled. */ | |
8176 | ||
8177 | boolean | |
8178 | elf_gc_common_final_link (abfd, info) | |
8179 | bfd *abfd; | |
8180 | struct bfd_link_info *info; | |
8181 | { | |
8182 | if (!elf_gc_common_finalize_got_offsets (abfd, info)) | |
8183 | return false; | |
8184 | ||
8185 | /* Invoke the regular ELF backend linker to do all the work. */ | |
8186 | return elf_bfd_final_link (abfd, info); | |
8187 | } | |
8188 | ||
8189 | /* This function will be called though elf_link_hash_traverse to store | |
8190 | all hash value of the exported symbols in an array. */ | |
8191 | ||
8192 | static boolean | |
8193 | elf_collect_hash_codes (h, data) | |
8194 | struct elf_link_hash_entry *h; | |
8195 | PTR data; | |
8196 | { | |
8197 | unsigned long **valuep = (unsigned long **) data; | |
8198 | const char *name; | |
8199 | char *p; | |
8200 | unsigned long ha; | |
8201 | char *alc = NULL; | |
8202 | ||
e92d460e AM |
8203 | if (h->root.type == bfd_link_hash_warning) |
8204 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8205 | ||
252b5132 RH |
8206 | /* Ignore indirect symbols. These are added by the versioning code. */ |
8207 | if (h->dynindx == -1) | |
8208 | return true; | |
8209 | ||
8210 | name = h->root.root.string; | |
8211 | p = strchr (name, ELF_VER_CHR); | |
8212 | if (p != NULL) | |
8213 | { | |
dc810e39 AM |
8214 | alc = bfd_malloc ((bfd_size_type) (p - name + 1)); |
8215 | memcpy (alc, name, (size_t) (p - name)); | |
252b5132 RH |
8216 | alc[p - name] = '\0'; |
8217 | name = alc; | |
8218 | } | |
8219 | ||
8220 | /* Compute the hash value. */ | |
8221 | ha = bfd_elf_hash (name); | |
8222 | ||
8223 | /* Store the found hash value in the array given as the argument. */ | |
8224 | *(*valuep)++ = ha; | |
8225 | ||
8226 | /* And store it in the struct so that we can put it in the hash table | |
8227 | later. */ | |
8228 | h->elf_hash_value = ha; | |
8229 | ||
8230 | if (alc != NULL) | |
8231 | free (alc); | |
8232 | ||
8233 | return true; | |
8234 | } | |
73d074b4 DJ |
8235 | |
8236 | boolean | |
8237 | elf_reloc_symbol_deleted_p (offset, cookie) | |
8238 | bfd_vma offset; | |
8239 | PTR cookie; | |
8240 | { | |
9ad5cbcf | 8241 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
73d074b4 DJ |
8242 | |
8243 | if (rcookie->bad_symtab) | |
8244 | rcookie->rel = rcookie->rels; | |
8245 | ||
8246 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
8247 | { | |
8248 | unsigned long r_symndx = ELF_R_SYM (rcookie->rel->r_info); | |
73d074b4 DJ |
8249 | |
8250 | if (! rcookie->bad_symtab) | |
8251 | if (rcookie->rel->r_offset > offset) | |
8252 | return false; | |
8253 | if (rcookie->rel->r_offset != offset) | |
8254 | continue; | |
8255 | ||
73d074b4 | 8256 | if (r_symndx >= rcookie->locsymcount |
6cdc0ccc | 8257 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) |
73d074b4 DJ |
8258 | { |
8259 | struct elf_link_hash_entry *h; | |
8260 | ||
8261 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
8262 | ||
8263 | while (h->root.type == bfd_link_hash_indirect | |
8264 | || h->root.type == bfd_link_hash_warning) | |
8265 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8266 | ||
8267 | if ((h->root.type == bfd_link_hash_defined | |
8268 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 8269 | && elf_discarded_section (h->root.u.def.section)) |
73d074b4 DJ |
8270 | return true; |
8271 | else | |
8272 | return false; | |
8273 | } | |
6cdc0ccc | 8274 | else |
73d074b4 DJ |
8275 | { |
8276 | /* It's not a relocation against a global symbol, | |
44421011 | 8277 | but it could be a relocation against a local |
73d074b4 DJ |
8278 | symbol for a discarded section. */ |
8279 | asection *isec; | |
6cdc0ccc | 8280 | Elf_Internal_Sym *isym; |
73d074b4 DJ |
8281 | |
8282 | /* Need to: get the symbol; get the section. */ | |
6cdc0ccc AM |
8283 | isym = &rcookie->locsyms[r_symndx]; |
8284 | if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
73d074b4 | 8285 | { |
6cdc0ccc | 8286 | isec = section_from_elf_index (rcookie->abfd, isym->st_shndx); |
ed4de5e2 | 8287 | if (isec != NULL && elf_discarded_section (isec)) |
73d074b4 DJ |
8288 | return true; |
8289 | } | |
8290 | } | |
8291 | return false; | |
8292 | } | |
8293 | return false; | |
8294 | } | |
8295 | ||
8296 | /* Discard unneeded references to discarded sections. | |
8297 | Returns true if any section's size was changed. */ | |
8298 | /* This function assumes that the relocations are in sorted order, | |
8299 | which is true for all known assemblers. */ | |
8300 | ||
8301 | boolean | |
65765700 JJ |
8302 | elf_bfd_discard_info (output_bfd, info) |
8303 | bfd *output_bfd; | |
73d074b4 DJ |
8304 | struct bfd_link_info *info; |
8305 | { | |
8306 | struct elf_reloc_cookie cookie; | |
65765700 | 8307 | asection *stab, *eh, *ehdr; |
73d074b4 | 8308 | Elf_Internal_Shdr *symtab_hdr; |
73d074b4 DJ |
8309 | struct elf_backend_data *bed; |
8310 | bfd *abfd; | |
8311 | boolean ret = false; | |
65765700 | 8312 | boolean strip = info->strip == strip_all || info->strip == strip_debugger; |
73d074b4 DJ |
8313 | |
8314 | if (info->relocateable | |
8315 | || info->traditional_format | |
8316 | || info->hash->creator->flavour != bfd_target_elf_flavour | |
65765700 | 8317 | || ! is_elf_hash_table (info)) |
73d074b4 | 8318 | return false; |
65765700 | 8319 | |
72dd6331 AM |
8320 | ehdr = NULL; |
8321 | if (elf_hash_table (info)->dynobj != NULL) | |
8322 | ehdr = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
8323 | ".eh_frame_hdr"); | |
65765700 | 8324 | |
73d074b4 DJ |
8325 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
8326 | { | |
163c1c30 L |
8327 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
8328 | continue; | |
8329 | ||
73d074b4 DJ |
8330 | bed = get_elf_backend_data (abfd); |
8331 | ||
8332 | if ((abfd->flags & DYNAMIC) != 0) | |
8333 | continue; | |
8334 | ||
65765700 JJ |
8335 | eh = NULL; |
8336 | if (ehdr) | |
8337 | { | |
8338 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); | |
2d653fc7 AM |
8339 | if (eh && (eh->_raw_size == 0 |
8340 | || bfd_is_abs_section (eh->output_section))) | |
65765700 JJ |
8341 | eh = NULL; |
8342 | } | |
8343 | ||
2d653fc7 AM |
8344 | stab = NULL; |
8345 | if (!strip) | |
8346 | { | |
8347 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
8348 | if (stab && (stab->_raw_size == 0 | |
8349 | || bfd_is_abs_section (stab->output_section))) | |
8350 | stab = NULL; | |
8351 | } | |
40b829d4 AM |
8352 | if ((! stab |
8353 | || elf_section_data(stab)->sec_info_type != ELF_INFO_TYPE_STABS) | |
65765700 JJ |
8354 | && ! eh |
8355 | && (strip || ! bed->elf_backend_discard_info)) | |
73d074b4 DJ |
8356 | continue; |
8357 | ||
8358 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
73d074b4 DJ |
8359 | cookie.abfd = abfd; |
8360 | cookie.sym_hashes = elf_sym_hashes (abfd); | |
8361 | cookie.bad_symtab = elf_bad_symtab (abfd); | |
8362 | if (cookie.bad_symtab) | |
8363 | { | |
8364 | cookie.locsymcount = | |
8365 | symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
8366 | cookie.extsymoff = 0; | |
8367 | } | |
8368 | else | |
8369 | { | |
8370 | cookie.locsymcount = symtab_hdr->sh_info; | |
8371 | cookie.extsymoff = symtab_hdr->sh_info; | |
8372 | } | |
8373 | ||
6cdc0ccc AM |
8374 | cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
8375 | if (cookie.locsyms == NULL && cookie.locsymcount != 0) | |
c44233aa | 8376 | { |
6cdc0ccc AM |
8377 | cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
8378 | cookie.locsymcount, 0, | |
8379 | NULL, NULL, NULL); | |
c44233aa | 8380 | if (cookie.locsyms == NULL) |
9ad5cbcf | 8381 | return false; |
9ad5cbcf | 8382 | } |
73d074b4 | 8383 | |
65765700 | 8384 | if (stab) |
73d074b4 DJ |
8385 | { |
8386 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) | |
6cdc0ccc | 8387 | (abfd, stab, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
73d074b4 DJ |
8388 | info->keep_memory)); |
8389 | if (cookie.rels) | |
8390 | { | |
8391 | cookie.rel = cookie.rels; | |
8392 | cookie.relend = | |
65765700 JJ |
8393 | cookie.rels + stab->reloc_count * bed->s->int_rels_per_ext_rel; |
8394 | if (_bfd_discard_section_stabs (abfd, stab, | |
8395 | elf_section_data (stab)->sec_info, | |
73d074b4 DJ |
8396 | elf_reloc_symbol_deleted_p, |
8397 | &cookie)) | |
8398 | ret = true; | |
6cdc0ccc | 8399 | if (elf_section_data (stab)->relocs != cookie.rels) |
73d074b4 DJ |
8400 | free (cookie.rels); |
8401 | } | |
8402 | } | |
8403 | ||
65765700 JJ |
8404 | if (eh) |
8405 | { | |
8406 | cookie.rels = NULL; | |
8407 | cookie.rel = NULL; | |
8408 | cookie.relend = NULL; | |
8409 | if (eh->reloc_count) | |
8410 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) | |
40b829d4 | 8411 | (abfd, eh, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
65765700 JJ |
8412 | info->keep_memory)); |
8413 | if (cookie.rels) | |
8414 | { | |
8415 | cookie.rel = cookie.rels; | |
8416 | cookie.relend = | |
8417 | cookie.rels + eh->reloc_count * bed->s->int_rels_per_ext_rel; | |
8418 | } | |
8419 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, ehdr, | |
8420 | elf_reloc_symbol_deleted_p, | |
8421 | &cookie)) | |
8422 | ret = true; | |
6cdc0ccc | 8423 | if (cookie.rels && elf_section_data (eh)->relocs != cookie.rels) |
65765700 JJ |
8424 | free (cookie.rels); |
8425 | } | |
8426 | ||
73d074b4 DJ |
8427 | if (bed->elf_backend_discard_info) |
8428 | { | |
8429 | if (bed->elf_backend_discard_info (abfd, &cookie, info)) | |
8430 | ret = true; | |
8431 | } | |
8432 | ||
6cdc0ccc AM |
8433 | if (cookie.locsyms != NULL |
8434 | && symtab_hdr->contents != (unsigned char *) cookie.locsyms) | |
8435 | { | |
8436 | if (! info->keep_memory) | |
8437 | free (cookie.locsyms); | |
8438 | else | |
8439 | symtab_hdr->contents = (unsigned char *) cookie.locsyms; | |
8440 | } | |
73d074b4 | 8441 | } |
65765700 | 8442 | |
40b829d4 | 8443 | if (ehdr && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info, ehdr)) |
65765700 | 8444 | ret = true; |
73d074b4 DJ |
8445 | return ret; |
8446 | } | |
8447 | ||
8448 | static boolean | |
8449 | elf_section_ignore_discarded_relocs (sec) | |
8450 | asection *sec; | |
8451 | { | |
40b829d4 AM |
8452 | struct elf_backend_data *bed; |
8453 | ||
65765700 JJ |
8454 | switch (elf_section_data (sec)->sec_info_type) |
8455 | { | |
8456 | case ELF_INFO_TYPE_STABS: | |
8457 | case ELF_INFO_TYPE_EH_FRAME: | |
8458 | return true; | |
8459 | default: | |
8460 | break; | |
8461 | } | |
40b829d4 AM |
8462 | |
8463 | bed = get_elf_backend_data (sec->owner); | |
8464 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
8465 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
73d074b4 | 8466 | return true; |
65765700 JJ |
8467 | |
8468 | return false; | |
73d074b4 | 8469 | } |