Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF linker support. |
79349b09 | 2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 | 4 | |
ae9a127f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
ae9a127f NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
252b5132 | 11 | |
ae9a127f NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
ae9a127f NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
252b5132 RH |
20 | |
21 | /* ELF linker code. */ | |
22 | ||
29ca8dc5 NS |
23 | #include "safe-ctype.h" |
24 | ||
268b6b39 | 25 | static bfd_boolean elf_link_add_object_symbols (bfd *, struct bfd_link_info *); |
268b6b39 AM |
26 | static bfd_boolean elf_finalize_dynstr (bfd *, struct bfd_link_info *); |
27 | static bfd_boolean elf_collect_hash_codes (struct elf_link_hash_entry *, | |
28 | void *); | |
29 | static bfd_boolean elf_section_ignore_discarded_relocs (asection *); | |
252b5132 RH |
30 | |
31 | /* Given an ELF BFD, add symbols to the global hash table as | |
32 | appropriate. */ | |
33 | ||
b34976b6 | 34 | bfd_boolean |
268b6b39 | 35 | elf_bfd_link_add_symbols (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
36 | { |
37 | switch (bfd_get_format (abfd)) | |
38 | { | |
39 | case bfd_object: | |
40 | return elf_link_add_object_symbols (abfd, info); | |
41 | case bfd_archive: | |
0ad989f9 | 42 | return _bfd_elf_link_add_archive_symbols (abfd, info); |
252b5132 RH |
43 | default: |
44 | bfd_set_error (bfd_error_wrong_format); | |
b34976b6 | 45 | return FALSE; |
252b5132 RH |
46 | } |
47 | } | |
48 | \f | |
b60d7a1a L |
49 | /* Sort symbol by value and section. */ |
50 | static int | |
51 | sort_symbol (const void *arg1, const void *arg2) | |
52 | { | |
53 | const struct elf_link_hash_entry *h1 | |
54 | = *(const struct elf_link_hash_entry **) arg1; | |
55 | const struct elf_link_hash_entry *h2 | |
56 | = *(const struct elf_link_hash_entry **) arg2; | |
57 | bfd_signed_vma vdiff = h1->root.u.def.value - h2->root.u.def.value; | |
58 | ||
59 | if (vdiff) | |
60 | return vdiff > 0 ? 1 : -1; | |
61 | else | |
62 | { | |
63 | long sdiff = h1->root.u.def.section - h2->root.u.def.section; | |
64 | if (sdiff) | |
65 | return sdiff > 0 ? 1 : -1; | |
66 | else | |
67 | return 0; | |
68 | } | |
69 | } | |
70 | ||
4a43e768 AM |
71 | /* Add a DT_NEEDED entry for this dynamic object. Returns -1 on error, |
72 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ | |
73 | ||
74 | static int | |
75 | add_dt_needed_tag (struct bfd_link_info *info, const char *soname, | |
76 | bfd_boolean do_it) | |
77 | { | |
78 | struct elf_link_hash_table *hash_table; | |
79 | bfd_size_type oldsize; | |
80 | bfd_size_type strindex; | |
81 | ||
82 | hash_table = elf_hash_table (info); | |
83 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); | |
84 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); | |
85 | if (strindex == (bfd_size_type) -1) | |
86 | return -1; | |
87 | ||
88 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) | |
89 | { | |
90 | asection *sdyn; | |
91 | Elf_External_Dyn *dyncon, *dynconend; | |
92 | ||
93 | sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic"); | |
94 | BFD_ASSERT (sdyn != NULL); | |
95 | ||
96 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
97 | dynconend = (Elf_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
98 | for (; dyncon < dynconend; dyncon++) | |
99 | { | |
100 | Elf_Internal_Dyn dyn; | |
101 | ||
102 | elf_swap_dyn_in (hash_table->dynobj, dyncon, & dyn); | |
103 | if (dyn.d_tag == DT_NEEDED | |
104 | && dyn.d_un.d_val == strindex) | |
105 | { | |
106 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
107 | return 1; | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | if (do_it) | |
113 | { | |
114 | if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex)) | |
115 | return -1; | |
116 | } | |
117 | else | |
118 | /* We were just checking for existence of the tag. */ | |
119 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
45d6a902 | 124 | /* Add symbols from an ELF object file to the linker hash table. */ |
252b5132 | 125 | |
b34976b6 | 126 | static bfd_boolean |
268b6b39 | 127 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 128 | { |
45d6a902 | 129 | bfd_boolean (*add_symbol_hook) |
268b6b39 AM |
130 | (bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, |
131 | const char **, flagword *, asection **, bfd_vma *); | |
45d6a902 | 132 | bfd_boolean (*check_relocs) |
268b6b39 | 133 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
45d6a902 AM |
134 | bfd_boolean collect; |
135 | Elf_Internal_Shdr *hdr; | |
136 | bfd_size_type symcount; | |
137 | bfd_size_type extsymcount; | |
138 | bfd_size_type extsymoff; | |
139 | struct elf_link_hash_entry **sym_hash; | |
140 | bfd_boolean dynamic; | |
141 | Elf_External_Versym *extversym = NULL; | |
142 | Elf_External_Versym *ever; | |
143 | struct elf_link_hash_entry *weaks; | |
144 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
145 | bfd_size_type nondeflt_vers_cnt = 0; | |
146 | Elf_Internal_Sym *isymbuf = NULL; | |
147 | Elf_Internal_Sym *isym; | |
148 | Elf_Internal_Sym *isymend; | |
9c5bfbb7 | 149 | const struct elf_backend_data *bed; |
45d6a902 | 150 | bfd_boolean dt_needed; |
79349b09 | 151 | bfd_boolean add_needed; |
45d6a902 AM |
152 | struct elf_link_hash_table * hash_table; |
153 | bfd_size_type amt; | |
252b5132 | 154 | |
45d6a902 | 155 | hash_table = elf_hash_table (info); |
252b5132 | 156 | |
45d6a902 AM |
157 | bed = get_elf_backend_data (abfd); |
158 | add_symbol_hook = bed->elf_add_symbol_hook; | |
159 | collect = bed->collect; | |
252b5132 | 160 | |
45d6a902 AM |
161 | if ((abfd->flags & DYNAMIC) == 0) |
162 | dynamic = FALSE; | |
252b5132 | 163 | else |
252b5132 | 164 | { |
45d6a902 | 165 | dynamic = TRUE; |
252b5132 | 166 | |
45d6a902 AM |
167 | /* You can't use -r against a dynamic object. Also, there's no |
168 | hope of using a dynamic object which does not exactly match | |
169 | the format of the output file. */ | |
0eddce27 AM |
170 | if (info->relocatable |
171 | || !is_elf_hash_table (hash_table) | |
172 | || hash_table->root.creator != abfd->xvec) | |
45d6a902 AM |
173 | { |
174 | bfd_set_error (bfd_error_invalid_operation); | |
175 | goto error_return; | |
176 | } | |
252b5132 RH |
177 | } |
178 | ||
45d6a902 AM |
179 | /* As a GNU extension, any input sections which are named |
180 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
181 | symbol. This differs from .gnu.warning sections, which generate | |
182 | warnings when they are included in an output file. */ | |
36af4a4e | 183 | if (info->executable) |
45d6a902 AM |
184 | { |
185 | asection *s; | |
b4536acd | 186 | |
45d6a902 AM |
187 | for (s = abfd->sections; s != NULL; s = s->next) |
188 | { | |
189 | const char *name; | |
252b5132 | 190 | |
45d6a902 AM |
191 | name = bfd_get_section_name (abfd, s); |
192 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
193 | { | |
194 | char *msg; | |
195 | bfd_size_type sz; | |
8c675694 NC |
196 | bfd_size_type prefix_len; |
197 | const char * gnu_warning_prefix = _("warning: "); | |
252b5132 | 198 | |
45d6a902 | 199 | name += sizeof ".gnu.warning." - 1; |
0035bd7b | 200 | |
45d6a902 AM |
201 | /* If this is a shared object, then look up the symbol |
202 | in the hash table. If it is there, and it is already | |
203 | been defined, then we will not be using the entry | |
204 | from this shared object, so we don't need to warn. | |
205 | FIXME: If we see the definition in a regular object | |
206 | later on, we will warn, but we shouldn't. The only | |
207 | fix is to keep track of what warnings we are supposed | |
208 | to emit, and then handle them all at the end of the | |
209 | link. */ | |
0eddce27 | 210 | if (dynamic) |
45d6a902 AM |
211 | { |
212 | struct elf_link_hash_entry *h; | |
0035bd7b | 213 | |
45d6a902 AM |
214 | h = elf_link_hash_lookup (hash_table, name, |
215 | FALSE, FALSE, TRUE); | |
0035bd7b | 216 | |
45d6a902 AM |
217 | /* FIXME: What about bfd_link_hash_common? */ |
218 | if (h != NULL | |
219 | && (h->root.type == bfd_link_hash_defined | |
220 | || h->root.type == bfd_link_hash_defweak)) | |
221 | { | |
222 | /* We don't want to issue this warning. Clobber | |
223 | the section size so that the warning does not | |
224 | get copied into the output file. */ | |
225 | s->_raw_size = 0; | |
226 | continue; | |
227 | } | |
228 | } | |
0035bd7b | 229 | |
45d6a902 | 230 | sz = bfd_section_size (abfd, s); |
8c675694 NC |
231 | prefix_len = strlen (gnu_warning_prefix); |
232 | msg = bfd_alloc (abfd, prefix_len + sz + 1); | |
45d6a902 AM |
233 | if (msg == NULL) |
234 | goto error_return; | |
252b5132 | 235 | |
8c675694 NC |
236 | strcpy (msg, gnu_warning_prefix); |
237 | if (! bfd_get_section_contents (abfd, s, msg + prefix_len, 0, sz)) | |
45d6a902 | 238 | goto error_return; |
252b5132 | 239 | |
8c675694 | 240 | msg[prefix_len + sz] = '\0'; |
252b5132 | 241 | |
45d6a902 | 242 | if (! (_bfd_generic_link_add_one_symbol |
268b6b39 AM |
243 | (info, abfd, name, BSF_WARNING, s, 0, msg, |
244 | FALSE, collect, NULL))) | |
45d6a902 | 245 | goto error_return; |
252b5132 | 246 | |
1049f94e | 247 | if (! info->relocatable) |
45d6a902 AM |
248 | { |
249 | /* Clobber the section size so that the warning does | |
250 | not get copied into the output file. */ | |
251 | s->_raw_size = 0; | |
252 | } | |
1b1fe8fe | 253 | } |
d31e3dfe | 254 | } |
1b1fe8fe L |
255 | } |
256 | ||
45d6a902 | 257 | dt_needed = FALSE; |
4a43e768 | 258 | add_needed = TRUE; |
45d6a902 | 259 | if (! dynamic) |
c424e0e9 | 260 | { |
45d6a902 AM |
261 | /* If we are creating a shared library, create all the dynamic |
262 | sections immediately. We need to attach them to something, | |
263 | so we attach them to this BFD, provided it is the right | |
264 | format. FIXME: If there are no input BFD's of the same | |
265 | format as the output, we can't make a shared library. */ | |
266 | if (info->shared | |
0eddce27 AM |
267 | && is_elf_hash_table (hash_table) |
268 | && hash_table->root.creator == abfd->xvec | |
269 | && ! hash_table->dynamic_sections_created) | |
c424e0e9 | 270 | { |
45d6a902 AM |
271 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) |
272 | goto error_return; | |
c424e0e9 L |
273 | } |
274 | } | |
0eddce27 | 275 | else if (!is_elf_hash_table (hash_table)) |
45d6a902 | 276 | goto error_return; |
c424e0e9 | 277 | else |
c424e0e9 | 278 | { |
45d6a902 | 279 | asection *s; |
4a43e768 | 280 | const char *soname = NULL; |
45d6a902 | 281 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
4a43e768 | 282 | int ret; |
252b5132 | 283 | |
45d6a902 AM |
284 | /* ld --just-symbols and dynamic objects don't mix very well. |
285 | Test for --just-symbols by looking at info set up by | |
286 | _bfd_elf_link_just_syms. */ | |
287 | if ((s = abfd->sections) != NULL | |
288 | && s->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) | |
289 | goto error_return; | |
252b5132 | 290 | |
4a43e768 AM |
291 | /* If this dynamic lib was specified on the command line with |
292 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
293 | tag unless the lib is actually used. | |
294 | For libs brought in by another lib's DT_NEEDED we do the same, | |
295 | and also modify handling of weak syms. */ | |
296 | switch elf_dyn_lib_class (abfd) | |
297 | { | |
298 | case DYN_NORMAL: | |
299 | break; | |
300 | case DYN_DT_NEEDED: | |
301 | dt_needed = TRUE; | |
302 | /* Fall thru */ | |
303 | case DYN_AS_NEEDED: | |
304 | add_needed = FALSE; | |
45d6a902 | 305 | } |
4a43e768 | 306 | |
45d6a902 AM |
307 | s = bfd_get_section_by_name (abfd, ".dynamic"); |
308 | if (s != NULL) | |
309 | { | |
310 | Elf_External_Dyn *dynbuf = NULL; | |
311 | Elf_External_Dyn *extdyn; | |
312 | Elf_External_Dyn *extdynend; | |
313 | int elfsec; | |
314 | unsigned long shlink; | |
252b5132 | 315 | |
268b6b39 | 316 | dynbuf = bfd_malloc (s->_raw_size); |
45d6a902 AM |
317 | if (dynbuf == NULL) |
318 | goto error_return; | |
252b5132 | 319 | |
268b6b39 | 320 | if (! bfd_get_section_contents (abfd, s, dynbuf, 0, s->_raw_size)) |
45d6a902 | 321 | goto error_free_dyn; |
252b5132 | 322 | |
45d6a902 AM |
323 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); |
324 | if (elfsec == -1) | |
325 | goto error_free_dyn; | |
326 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
252b5132 | 327 | |
45d6a902 AM |
328 | extdyn = dynbuf; |
329 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
330 | for (; extdyn < extdynend; extdyn++) | |
331 | { | |
332 | Elf_Internal_Dyn dyn; | |
252b5132 | 333 | |
45d6a902 AM |
334 | elf_swap_dyn_in (abfd, extdyn, &dyn); |
335 | if (dyn.d_tag == DT_SONAME) | |
336 | { | |
337 | unsigned int tagv = dyn.d_un.d_val; | |
4a43e768 AM |
338 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
339 | if (soname == NULL) | |
45d6a902 AM |
340 | goto error_free_dyn; |
341 | } | |
342 | if (dyn.d_tag == DT_NEEDED) | |
343 | { | |
344 | struct bfd_link_needed_list *n, **pn; | |
345 | char *fnm, *anm; | |
346 | unsigned int tagv = dyn.d_un.d_val; | |
252b5132 | 347 | |
45d6a902 | 348 | amt = sizeof (struct bfd_link_needed_list); |
268b6b39 | 349 | n = bfd_alloc (abfd, amt); |
45d6a902 AM |
350 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
351 | if (n == NULL || fnm == NULL) | |
352 | goto error_free_dyn; | |
353 | amt = strlen (fnm) + 1; | |
354 | anm = bfd_alloc (abfd, amt); | |
355 | if (anm == NULL) | |
356 | goto error_free_dyn; | |
268b6b39 | 357 | memcpy (anm, fnm, amt); |
45d6a902 AM |
358 | n->name = anm; |
359 | n->by = abfd; | |
360 | n->next = NULL; | |
361 | for (pn = & hash_table->needed; | |
362 | *pn != NULL; | |
363 | pn = &(*pn)->next) | |
364 | ; | |
365 | *pn = n; | |
366 | } | |
367 | if (dyn.d_tag == DT_RUNPATH) | |
368 | { | |
369 | struct bfd_link_needed_list *n, **pn; | |
370 | char *fnm, *anm; | |
371 | unsigned int tagv = dyn.d_un.d_val; | |
252b5132 | 372 | |
45d6a902 | 373 | amt = sizeof (struct bfd_link_needed_list); |
268b6b39 | 374 | n = bfd_alloc (abfd, amt); |
45d6a902 AM |
375 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
376 | if (n == NULL || fnm == NULL) | |
377 | goto error_free_dyn; | |
378 | amt = strlen (fnm) + 1; | |
379 | anm = bfd_alloc (abfd, amt); | |
380 | if (anm == NULL) | |
381 | goto error_free_dyn; | |
268b6b39 | 382 | memcpy (anm, fnm, amt); |
45d6a902 AM |
383 | n->name = anm; |
384 | n->by = abfd; | |
385 | n->next = NULL; | |
386 | for (pn = & runpath; | |
387 | *pn != NULL; | |
388 | pn = &(*pn)->next) | |
389 | ; | |
390 | *pn = n; | |
391 | } | |
392 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
393 | if (!runpath && dyn.d_tag == DT_RPATH) | |
394 | { | |
395 | struct bfd_link_needed_list *n, **pn; | |
396 | char *fnm, *anm; | |
397 | unsigned int tagv = dyn.d_un.d_val; | |
252b5132 | 398 | |
45d6a902 | 399 | amt = sizeof (struct bfd_link_needed_list); |
268b6b39 | 400 | n = bfd_alloc (abfd, amt); |
45d6a902 AM |
401 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
402 | if (n == NULL || fnm == NULL) | |
403 | goto error_free_dyn; | |
404 | amt = strlen (fnm) + 1; | |
405 | anm = bfd_alloc (abfd, amt); | |
406 | if (anm == NULL) | |
407 | { | |
408 | error_free_dyn: | |
409 | free (dynbuf); | |
410 | goto error_return; | |
411 | } | |
268b6b39 | 412 | memcpy (anm, fnm, amt); |
45d6a902 AM |
413 | n->name = anm; |
414 | n->by = abfd; | |
415 | n->next = NULL; | |
416 | for (pn = & rpath; | |
417 | *pn != NULL; | |
418 | pn = &(*pn)->next) | |
419 | ; | |
420 | *pn = n; | |
421 | } | |
422 | } | |
252b5132 | 423 | |
45d6a902 AM |
424 | free (dynbuf); |
425 | } | |
252b5132 | 426 | |
45d6a902 AM |
427 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that |
428 | frees all more recently bfd_alloc'd blocks as well. */ | |
429 | if (runpath) | |
430 | rpath = runpath; | |
3c0a515d | 431 | |
45d6a902 | 432 | if (rpath) |
3c0a515d | 433 | { |
45d6a902 AM |
434 | struct bfd_link_needed_list **pn; |
435 | for (pn = & hash_table->runpath; | |
436 | *pn != NULL; | |
437 | pn = &(*pn)->next) | |
438 | ; | |
439 | *pn = rpath; | |
3c0a515d | 440 | } |
252b5132 | 441 | |
45d6a902 AM |
442 | /* We do not want to include any of the sections in a dynamic |
443 | object in the output file. We hack by simply clobbering the | |
444 | list of sections in the BFD. This could be handled more | |
445 | cleanly by, say, a new section flag; the existing | |
446 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
447 | still implies that the section takes up space in the output | |
448 | file. */ | |
449 | bfd_section_list_clear (abfd); | |
0525d26e | 450 | |
45d6a902 AM |
451 | /* If this is the first dynamic object found in the link, create |
452 | the special sections required for dynamic linking. */ | |
0eddce27 AM |
453 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) |
454 | goto error_return; | |
0525d26e | 455 | |
4a43e768 AM |
456 | /* Find the name to use in a DT_NEEDED entry that refers to this |
457 | object. If the object has a DT_SONAME entry, we use it. | |
458 | Otherwise, if the generic linker stuck something in | |
459 | elf_dt_name, we use that. Otherwise, we just use the file | |
460 | name. */ | |
461 | if (soname == NULL || *soname == '\0') | |
45d6a902 | 462 | { |
4a43e768 AM |
463 | soname = elf_dt_name (abfd); |
464 | if (soname == NULL || *soname == '\0') | |
465 | soname = bfd_get_filename (abfd); | |
466 | } | |
215007a6 | 467 | |
4a43e768 AM |
468 | /* Save the SONAME because sometimes the linker emulation code |
469 | will need to know it. */ | |
470 | elf_dt_name (abfd) = soname; | |
45d6a902 | 471 | |
4a43e768 AM |
472 | ret = add_dt_needed_tag (info, soname, add_needed); |
473 | if (ret < 0) | |
474 | goto error_return; | |
45d6a902 | 475 | |
4a43e768 AM |
476 | /* If we have already included this dynamic object in the |
477 | link, just ignore it. There is no reason to include a | |
478 | particular dynamic object more than once. */ | |
479 | if (ret > 0) | |
480 | return TRUE; | |
215007a6 L |
481 | } |
482 | ||
45d6a902 AM |
483 | /* If this is a dynamic object, we always link against the .dynsym |
484 | symbol table, not the .symtab symbol table. The dynamic linker | |
485 | will only see the .dynsym symbol table, so there is no reason to | |
486 | look at .symtab for a dynamic object. */ | |
215007a6 | 487 | |
45d6a902 AM |
488 | if (! dynamic || elf_dynsymtab (abfd) == 0) |
489 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
490 | else | |
491 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
215007a6 | 492 | |
45d6a902 | 493 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); |
d31e3dfe | 494 | |
45d6a902 AM |
495 | /* The sh_info field of the symtab header tells us where the |
496 | external symbols start. We don't care about the local symbols at | |
497 | this point. */ | |
498 | if (elf_bad_symtab (abfd)) | |
215007a6 | 499 | { |
45d6a902 AM |
500 | extsymcount = symcount; |
501 | extsymoff = 0; | |
215007a6 L |
502 | } |
503 | else | |
504 | { | |
45d6a902 AM |
505 | extsymcount = symcount - hdr->sh_info; |
506 | extsymoff = hdr->sh_info; | |
215007a6 L |
507 | } |
508 | ||
45d6a902 AM |
509 | sym_hash = NULL; |
510 | if (extsymcount != 0) | |
215007a6 | 511 | { |
45d6a902 AM |
512 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, |
513 | NULL, NULL, NULL); | |
514 | if (isymbuf == NULL) | |
515 | goto error_return; | |
215007a6 | 516 | |
45d6a902 AM |
517 | /* We store a pointer to the hash table entry for each external |
518 | symbol. */ | |
519 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
268b6b39 | 520 | sym_hash = bfd_alloc (abfd, amt); |
45d6a902 AM |
521 | if (sym_hash == NULL) |
522 | goto error_free_sym; | |
523 | elf_sym_hashes (abfd) = sym_hash; | |
524 | } | |
215007a6 | 525 | |
45d6a902 AM |
526 | if (dynamic) |
527 | { | |
528 | /* Read in any version definitions. */ | |
529 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
530 | goto error_free_sym; | |
215007a6 | 531 | |
45d6a902 AM |
532 | /* Read in the symbol versions, but don't bother to convert them |
533 | to internal format. */ | |
534 | if (elf_dynversym (abfd) != 0) | |
215007a6 | 535 | { |
45d6a902 AM |
536 | Elf_Internal_Shdr *versymhdr; |
537 | ||
538 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
268b6b39 | 539 | extversym = bfd_malloc (versymhdr->sh_size); |
45d6a902 AM |
540 | if (extversym == NULL) |
541 | goto error_free_sym; | |
542 | amt = versymhdr->sh_size; | |
543 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
268b6b39 | 544 | || bfd_bread (extversym, amt, abfd) != amt) |
45d6a902 | 545 | goto error_free_vers; |
215007a6 L |
546 | } |
547 | } | |
548 | ||
45d6a902 | 549 | weaks = NULL; |
215007a6 | 550 | |
45d6a902 AM |
551 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
552 | for (isym = isymbuf, isymend = isymbuf + extsymcount; | |
553 | isym < isymend; | |
554 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
555 | { | |
556 | int bind; | |
557 | bfd_vma value; | |
558 | asection *sec; | |
559 | flagword flags; | |
560 | const char *name; | |
561 | struct elf_link_hash_entry *h; | |
562 | bfd_boolean definition; | |
563 | bfd_boolean size_change_ok; | |
564 | bfd_boolean type_change_ok; | |
565 | bfd_boolean new_weakdef; | |
566 | bfd_boolean override; | |
567 | unsigned int old_alignment; | |
568 | bfd *old_bfd; | |
215007a6 | 569 | |
45d6a902 | 570 | override = FALSE; |
d31e3dfe | 571 | |
45d6a902 AM |
572 | flags = BSF_NO_FLAGS; |
573 | sec = NULL; | |
574 | value = isym->st_value; | |
575 | *sym_hash = NULL; | |
215007a6 | 576 | |
45d6a902 AM |
577 | bind = ELF_ST_BIND (isym->st_info); |
578 | if (bind == STB_LOCAL) | |
579 | { | |
580 | /* This should be impossible, since ELF requires that all | |
581 | global symbols follow all local symbols, and that sh_info | |
4cc11e76 | 582 | point to the first global symbol. Unfortunately, Irix 5 |
45d6a902 AM |
583 | screws this up. */ |
584 | continue; | |
585 | } | |
586 | else if (bind == STB_GLOBAL) | |
587 | { | |
588 | if (isym->st_shndx != SHN_UNDEF | |
589 | && isym->st_shndx != SHN_COMMON) | |
590 | flags = BSF_GLOBAL; | |
591 | } | |
592 | else if (bind == STB_WEAK) | |
593 | flags = BSF_WEAK; | |
594 | else | |
595 | { | |
596 | /* Leave it up to the processor backend. */ | |
597 | } | |
215007a6 | 598 | |
45d6a902 AM |
599 | if (isym->st_shndx == SHN_UNDEF) |
600 | sec = bfd_und_section_ptr; | |
601 | else if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
602 | { | |
603 | sec = section_from_elf_index (abfd, isym->st_shndx); | |
604 | if (sec == NULL) | |
605 | sec = bfd_abs_section_ptr; | |
606 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
607 | value -= sec->vma; | |
608 | } | |
609 | else if (isym->st_shndx == SHN_ABS) | |
610 | sec = bfd_abs_section_ptr; | |
611 | else if (isym->st_shndx == SHN_COMMON) | |
612 | { | |
613 | sec = bfd_com_section_ptr; | |
614 | /* What ELF calls the size we call the value. What ELF | |
615 | calls the value we call the alignment. */ | |
616 | value = isym->st_size; | |
617 | } | |
618 | else | |
215007a6 | 619 | { |
45d6a902 AM |
620 | /* Leave it up to the processor backend. */ |
621 | } | |
622 | ||
623 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
624 | isym->st_name); | |
268b6b39 | 625 | if (name == NULL) |
45d6a902 | 626 | goto error_free_vers; |
215007a6 | 627 | |
45d6a902 AM |
628 | if (isym->st_shndx == SHN_COMMON |
629 | && ELF_ST_TYPE (isym->st_info) == STT_TLS) | |
630 | { | |
631 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
215007a6 | 632 | |
45d6a902 | 633 | if (tcomm == NULL) |
215007a6 | 634 | { |
45d6a902 AM |
635 | tcomm = bfd_make_section (abfd, ".tcommon"); |
636 | if (tcomm == NULL | |
637 | || !bfd_set_section_flags (abfd, tcomm, (SEC_ALLOC | |
638 | | SEC_IS_COMMON | |
639 | | SEC_LINKER_CREATED | |
640 | | SEC_THREAD_LOCAL))) | |
641 | goto error_free_vers; | |
215007a6 | 642 | } |
45d6a902 | 643 | sec = tcomm; |
215007a6 | 644 | } |
45d6a902 AM |
645 | else if (add_symbol_hook) |
646 | { | |
647 | if (! (*add_symbol_hook) (abfd, info, isym, &name, &flags, &sec, | |
648 | &value)) | |
649 | goto error_free_vers; | |
252b5132 | 650 | |
45d6a902 AM |
651 | /* The hook function sets the name to NULL if this symbol |
652 | should be skipped for some reason. */ | |
268b6b39 | 653 | if (name == NULL) |
45d6a902 AM |
654 | continue; |
655 | } | |
252b5132 | 656 | |
45d6a902 | 657 | /* Sanity check that all possibilities were handled. */ |
268b6b39 | 658 | if (sec == NULL) |
252b5132 | 659 | { |
45d6a902 AM |
660 | bfd_set_error (bfd_error_bad_value); |
661 | goto error_free_vers; | |
252b5132 | 662 | } |
252b5132 | 663 | |
45d6a902 AM |
664 | if (bfd_is_und_section (sec) |
665 | || bfd_is_com_section (sec)) | |
666 | definition = FALSE; | |
667 | else | |
668 | definition = TRUE; | |
252b5132 | 669 | |
45d6a902 AM |
670 | size_change_ok = FALSE; |
671 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; | |
672 | old_alignment = 0; | |
673 | old_bfd = NULL; | |
674 | ||
0eddce27 | 675 | if (is_elf_hash_table (hash_table)) |
252b5132 | 676 | { |
45d6a902 AM |
677 | Elf_Internal_Versym iver; |
678 | unsigned int vernum = 0; | |
679 | bfd_boolean skip; | |
252b5132 | 680 | |
45d6a902 | 681 | if (ever != NULL) |
252b5132 | 682 | { |
45d6a902 AM |
683 | _bfd_elf_swap_versym_in (abfd, ever, &iver); |
684 | vernum = iver.vs_vers & VERSYM_VERSION; | |
252b5132 | 685 | |
45d6a902 AM |
686 | /* If this is a hidden symbol, or if it is not version |
687 | 1, we append the version name to the symbol name. | |
688 | However, we do not modify a non-hidden absolute | |
689 | symbol, because it might be the version symbol | |
690 | itself. FIXME: What if it isn't? */ | |
691 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 | |
692 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
252b5132 | 693 | { |
45d6a902 AM |
694 | const char *verstr; |
695 | size_t namelen, verlen, newlen; | |
696 | char *newname, *p; | |
252b5132 | 697 | |
45d6a902 | 698 | if (isym->st_shndx != SHN_UNDEF) |
252b5132 | 699 | { |
45d6a902 AM |
700 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) |
701 | { | |
702 | (*_bfd_error_handler) | |
703 | (_("%s: %s: invalid version %u (max %d)"), | |
704 | bfd_archive_filename (abfd), name, vernum, | |
705 | elf_tdata (abfd)->dynverdef_hdr.sh_info); | |
706 | bfd_set_error (bfd_error_bad_value); | |
707 | goto error_free_vers; | |
708 | } | |
709 | else if (vernum > 1) | |
710 | verstr = | |
711 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
712 | else | |
713 | verstr = ""; | |
6cdc0ccc | 714 | } |
45d6a902 AM |
715 | else |
716 | { | |
717 | /* We cannot simply test for the number of | |
718 | entries in the VERNEED section since the | |
719 | numbers for the needed versions do not start | |
720 | at 0. */ | |
721 | Elf_Internal_Verneed *t; | |
252b5132 | 722 | |
45d6a902 AM |
723 | verstr = NULL; |
724 | for (t = elf_tdata (abfd)->verref; | |
725 | t != NULL; | |
726 | t = t->vn_nextref) | |
727 | { | |
728 | Elf_Internal_Vernaux *a; | |
252b5132 | 729 | |
45d6a902 AM |
730 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
731 | { | |
732 | if (a->vna_other == vernum) | |
733 | { | |
734 | verstr = a->vna_nodename; | |
735 | break; | |
736 | } | |
737 | } | |
738 | if (a != NULL) | |
739 | break; | |
740 | } | |
741 | if (verstr == NULL) | |
742 | { | |
743 | (*_bfd_error_handler) | |
744 | (_("%s: %s: invalid needed version %d"), | |
745 | bfd_archive_filename (abfd), name, vernum); | |
746 | bfd_set_error (bfd_error_bad_value); | |
747 | goto error_free_vers; | |
748 | } | |
749 | } | |
252b5132 | 750 | |
45d6a902 AM |
751 | namelen = strlen (name); |
752 | verlen = strlen (verstr); | |
753 | newlen = namelen + verlen + 2; | |
754 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
755 | && isym->st_shndx != SHN_UNDEF) | |
756 | ++newlen; | |
252b5132 | 757 | |
268b6b39 | 758 | newname = bfd_alloc (abfd, newlen); |
45d6a902 AM |
759 | if (newname == NULL) |
760 | goto error_free_vers; | |
761 | memcpy (newname, name, namelen); | |
762 | p = newname + namelen; | |
763 | *p++ = ELF_VER_CHR; | |
764 | /* If this is a defined non-hidden version symbol, | |
765 | we add another @ to the name. This indicates the | |
766 | default version of the symbol. */ | |
767 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
768 | && isym->st_shndx != SHN_UNDEF) | |
769 | *p++ = ELF_VER_CHR; | |
770 | memcpy (p, verstr, verlen + 1); | |
252b5132 | 771 | |
45d6a902 AM |
772 | name = newname; |
773 | } | |
774 | } | |
252b5132 | 775 | |
45d6a902 AM |
776 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
777 | sym_hash, &skip, &override, | |
778 | &type_change_ok, &size_change_ok, | |
779 | dt_needed)) | |
780 | goto error_free_vers; | |
252b5132 | 781 | |
45d6a902 AM |
782 | if (skip) |
783 | continue; | |
252b5132 | 784 | |
45d6a902 AM |
785 | if (override) |
786 | definition = FALSE; | |
252b5132 | 787 | |
45d6a902 AM |
788 | h = *sym_hash; |
789 | while (h->root.type == bfd_link_hash_indirect | |
790 | || h->root.type == bfd_link_hash_warning) | |
791 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
252b5132 | 792 | |
45d6a902 AM |
793 | /* Remember the old alignment if this is a common symbol, so |
794 | that we don't reduce the alignment later on. We can't | |
795 | check later, because _bfd_generic_link_add_one_symbol | |
796 | will set a default for the alignment which we want to | |
797 | override. We also remember the old bfd where the existing | |
798 | definition comes from. */ | |
799 | switch (h->root.type) | |
800 | { | |
801 | default: | |
802 | break; | |
252b5132 | 803 | |
45d6a902 AM |
804 | case bfd_link_hash_defined: |
805 | case bfd_link_hash_defweak: | |
806 | old_bfd = h->root.u.def.section->owner; | |
807 | break; | |
79349b09 | 808 | |
45d6a902 AM |
809 | case bfd_link_hash_common: |
810 | old_bfd = h->root.u.c.p->section->owner; | |
811 | old_alignment = h->root.u.c.p->alignment_power; | |
812 | break; | |
813 | } | |
252b5132 | 814 | |
45d6a902 AM |
815 | if (elf_tdata (abfd)->verdef != NULL |
816 | && ! override | |
817 | && vernum > 1 | |
818 | && definition) | |
819 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
820 | } | |
252b5132 | 821 | |
45d6a902 | 822 | if (! (_bfd_generic_link_add_one_symbol |
268b6b39 AM |
823 | (info, abfd, name, flags, sec, value, NULL, FALSE, collect, |
824 | (struct bfd_link_hash_entry **) sym_hash))) | |
45d6a902 | 825 | goto error_free_vers; |
252b5132 | 826 | |
45d6a902 AM |
827 | h = *sym_hash; |
828 | while (h->root.type == bfd_link_hash_indirect | |
829 | || h->root.type == bfd_link_hash_warning) | |
830 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
831 | *sym_hash = h; | |
252b5132 | 832 | |
45d6a902 AM |
833 | new_weakdef = FALSE; |
834 | if (dynamic | |
835 | && definition | |
836 | && (flags & BSF_WEAK) != 0 | |
837 | && ELF_ST_TYPE (isym->st_info) != STT_FUNC | |
0eddce27 | 838 | && is_elf_hash_table (hash_table) |
45d6a902 AM |
839 | && h->weakdef == NULL) |
840 | { | |
841 | /* Keep a list of all weak defined non function symbols from | |
842 | a dynamic object, using the weakdef field. Later in this | |
843 | function we will set the weakdef field to the correct | |
844 | value. We only put non-function symbols from dynamic | |
845 | objects on this list, because that happens to be the only | |
846 | time we need to know the normal symbol corresponding to a | |
847 | weak symbol, and the information is time consuming to | |
848 | figure out. If the weakdef field is not already NULL, | |
849 | then this symbol was already defined by some previous | |
850 | dynamic object, and we will be using that previous | |
851 | definition anyhow. */ | |
252b5132 | 852 | |
45d6a902 AM |
853 | h->weakdef = weaks; |
854 | weaks = h; | |
855 | new_weakdef = TRUE; | |
252b5132 RH |
856 | } |
857 | ||
45d6a902 AM |
858 | /* Set the alignment of a common symbol. */ |
859 | if (isym->st_shndx == SHN_COMMON | |
860 | && h->root.type == bfd_link_hash_common) | |
252b5132 | 861 | { |
45d6a902 AM |
862 | unsigned int align; |
863 | ||
864 | align = bfd_log2 (isym->st_value); | |
865 | if (align > old_alignment | |
866 | /* Permit an alignment power of zero if an alignment of one | |
867 | is specified and no other alignments have been specified. */ | |
868 | || (isym->st_value == 1 && old_alignment == 0)) | |
869 | h->root.u.c.p->alignment_power = align; | |
870 | else | |
871 | h->root.u.c.p->alignment_power = old_alignment; | |
252b5132 | 872 | } |
252b5132 | 873 | |
0eddce27 | 874 | if (is_elf_hash_table (hash_table)) |
45d6a902 AM |
875 | { |
876 | int old_flags; | |
877 | bfd_boolean dynsym; | |
878 | int new_flag; | |
879 | ||
880 | /* Check the alignment when a common symbol is involved. This | |
4cc11e76 | 881 | can change when a common symbol is overridden by a normal |
45d6a902 AM |
882 | definition or a common symbol is ignored due to the old |
883 | normal definition. We need to make sure the maximum | |
884 | alignment is maintained. */ | |
885 | if ((old_alignment || isym->st_shndx == SHN_COMMON) | |
886 | && h->root.type != bfd_link_hash_common) | |
887 | { | |
888 | unsigned int common_align; | |
889 | unsigned int normal_align; | |
890 | unsigned int symbol_align; | |
891 | bfd *normal_bfd; | |
892 | bfd *common_bfd; | |
893 | ||
894 | symbol_align = ffs (h->root.u.def.value) - 1; | |
40a0491a AM |
895 | if (h->root.u.def.section->owner != NULL |
896 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
45d6a902 AM |
897 | { |
898 | normal_align = h->root.u.def.section->alignment_power; | |
899 | if (normal_align > symbol_align) | |
900 | normal_align = symbol_align; | |
901 | } | |
902 | else | |
903 | normal_align = symbol_align; | |
904 | ||
905 | if (old_alignment) | |
906 | { | |
907 | common_align = old_alignment; | |
908 | common_bfd = old_bfd; | |
909 | normal_bfd = abfd; | |
910 | } | |
911 | else | |
912 | { | |
913 | common_align = bfd_log2 (isym->st_value); | |
914 | common_bfd = abfd; | |
915 | normal_bfd = old_bfd; | |
916 | } | |
917 | ||
918 | if (normal_align < common_align) | |
919 | (*_bfd_error_handler) | |
920 | (_("Warning: alignment %u of symbol `%s' in %s is smaller than %u in %s"), | |
921 | 1 << normal_align, | |
922 | name, | |
923 | bfd_archive_filename (normal_bfd), | |
924 | 1 << common_align, | |
925 | bfd_archive_filename (common_bfd)); | |
926 | } | |
252b5132 | 927 | |
45d6a902 AM |
928 | /* Remember the symbol size and type. */ |
929 | if (isym->st_size != 0 | |
930 | && (definition || h->size == 0)) | |
931 | { | |
932 | if (h->size != 0 && h->size != isym->st_size && ! size_change_ok) | |
933 | (*_bfd_error_handler) | |
934 | (_("Warning: size of symbol `%s' changed from %lu in %s to %lu in %s"), | |
935 | name, (unsigned long) h->size, | |
936 | bfd_archive_filename (old_bfd), | |
937 | (unsigned long) isym->st_size, | |
938 | bfd_archive_filename (abfd)); | |
252b5132 | 939 | |
45d6a902 AM |
940 | h->size = isym->st_size; |
941 | } | |
252b5132 | 942 | |
45d6a902 AM |
943 | /* If this is a common symbol, then we always want H->SIZE |
944 | to be the size of the common symbol. The code just above | |
945 | won't fix the size if a common symbol becomes larger. We | |
946 | don't warn about a size change here, because that is | |
947 | covered by --warn-common. */ | |
948 | if (h->root.type == bfd_link_hash_common) | |
949 | h->size = h->root.u.c.size; | |
252b5132 | 950 | |
45d6a902 AM |
951 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE |
952 | && (definition || h->type == STT_NOTYPE)) | |
953 | { | |
954 | if (h->type != STT_NOTYPE | |
955 | && h->type != ELF_ST_TYPE (isym->st_info) | |
956 | && ! type_change_ok) | |
957 | (*_bfd_error_handler) | |
958 | (_("Warning: type of symbol `%s' changed from %d to %d in %s"), | |
959 | name, h->type, ELF_ST_TYPE (isym->st_info), | |
960 | bfd_archive_filename (abfd)); | |
252b5132 | 961 | |
45d6a902 AM |
962 | h->type = ELF_ST_TYPE (isym->st_info); |
963 | } | |
252b5132 | 964 | |
45d6a902 AM |
965 | /* If st_other has a processor-specific meaning, specific |
966 | code might be needed here. We never merge the visibility | |
967 | attribute with the one from a dynamic object. */ | |
9bf7216d KK |
968 | if (bed->elf_backend_merge_symbol_attribute) |
969 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
970 | dynamic); | |
971 | ||
45d6a902 AM |
972 | if (isym->st_other != 0 && !dynamic) |
973 | { | |
974 | unsigned char hvis, symvis, other, nvis; | |
252b5132 | 975 | |
45d6a902 AM |
976 | /* Take the balance of OTHER from the definition. */ |
977 | other = (definition ? isym->st_other : h->other); | |
978 | other &= ~ ELF_ST_VISIBILITY (-1); | |
8ea2e4bd | 979 | |
45d6a902 AM |
980 | /* Combine visibilities, using the most constraining one. */ |
981 | hvis = ELF_ST_VISIBILITY (h->other); | |
982 | symvis = ELF_ST_VISIBILITY (isym->st_other); | |
983 | if (! hvis) | |
984 | nvis = symvis; | |
985 | else if (! symvis) | |
986 | nvis = hvis; | |
987 | else | |
988 | nvis = hvis < symvis ? hvis : symvis; | |
51b64d56 | 989 | |
45d6a902 AM |
990 | h->other = other | nvis; |
991 | } | |
252b5132 | 992 | |
45d6a902 AM |
993 | /* Set a flag in the hash table entry indicating the type of |
994 | reference or definition we just found. Keep a count of | |
995 | the number of dynamic symbols we find. A dynamic symbol | |
996 | is one which is referenced or defined by both a regular | |
997 | object and a shared object. */ | |
998 | old_flags = h->elf_link_hash_flags; | |
999 | dynsym = FALSE; | |
1000 | if (! dynamic) | |
1001 | { | |
1002 | if (! definition) | |
1003 | { | |
1004 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1005 | if (bind != STB_WEAK) | |
1006 | new_flag |= ELF_LINK_HASH_REF_REGULAR_NONWEAK; | |
1007 | } | |
1008 | else | |
1009 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
36af4a4e | 1010 | if (! info->executable |
45d6a902 AM |
1011 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC |
1012 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
1013 | dynsym = TRUE; | |
1014 | } | |
1015 | else | |
1016 | { | |
1017 | if (! definition) | |
1018 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1019 | else | |
1020 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
1021 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
1022 | | ELF_LINK_HASH_REF_REGULAR)) != 0 | |
1023 | || (h->weakdef != NULL | |
1024 | && ! new_weakdef | |
1025 | && h->weakdef->dynindx != -1)) | |
1026 | dynsym = TRUE; | |
1027 | } | |
252b5132 | 1028 | |
45d6a902 | 1029 | h->elf_link_hash_flags |= new_flag; |
252b5132 | 1030 | |
45d6a902 AM |
1031 | /* Check to see if we need to add an indirect symbol for |
1032 | the default name. */ | |
1033 | if (definition || h->root.type == bfd_link_hash_common) | |
1034 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
1035 | &sec, &value, &dynsym, | |
1036 | override, dt_needed)) | |
1037 | goto error_free_vers; | |
68f69152 | 1038 | |
45d6a902 AM |
1039 | if (definition && !dynamic) |
1040 | { | |
1041 | char *p = strchr (name, ELF_VER_CHR); | |
1042 | if (p != NULL && p[1] != ELF_VER_CHR) | |
1043 | { | |
1044 | /* Queue non-default versions so that .symver x, x@FOO | |
1045 | aliases can be checked. */ | |
1046 | if (! nondeflt_vers) | |
1047 | { | |
1048 | amt = (isymend - isym + 1) | |
1049 | * sizeof (struct elf_link_hash_entry *); | |
1050 | nondeflt_vers = bfd_malloc (amt); | |
1051 | } | |
1052 | nondeflt_vers [nondeflt_vers_cnt++] = h; | |
1053 | } | |
1054 | } | |
252b5132 | 1055 | |
45d6a902 AM |
1056 | if (dynsym && h->dynindx == -1) |
1057 | { | |
1058 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
1059 | goto error_free_vers; | |
1060 | if (h->weakdef != NULL | |
1061 | && ! new_weakdef | |
1062 | && h->weakdef->dynindx == -1) | |
1063 | { | |
1064 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
1065 | goto error_free_vers; | |
1066 | } | |
1067 | } | |
1068 | else if (dynsym && h->dynindx != -1) | |
1069 | /* If the symbol already has a dynamic index, but | |
1070 | visibility says it should not be visible, turn it into | |
1071 | a local symbol. */ | |
1072 | switch (ELF_ST_VISIBILITY (h->other)) | |
1073 | { | |
1074 | case STV_INTERNAL: | |
1075 | case STV_HIDDEN: | |
1076 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1077 | break; | |
1078 | } | |
252b5132 | 1079 | |
4a43e768 | 1080 | if (!add_needed && definition |
45d6a902 AM |
1081 | && (h->elf_link_hash_flags |
1082 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
1083 | { | |
4a43e768 | 1084 | int ret; |
252b5132 | 1085 | |
4a43e768 AM |
1086 | /* A symbol from a library loaded via DT_NEEDED of some |
1087 | other library is referenced by a regular object. | |
1088 | Add a DT_NEEDED entry for it. */ | |
79349b09 | 1089 | add_needed = TRUE; |
4a43e768 AM |
1090 | ret = add_dt_needed_tag (info, elf_dt_name (abfd), add_needed); |
1091 | if (ret < 0) | |
45d6a902 | 1092 | goto error_free_vers; |
252b5132 | 1093 | |
4a43e768 | 1094 | BFD_ASSERT (ret == 0); |
252b5132 RH |
1095 | } |
1096 | } | |
45d6a902 | 1097 | } |
252b5132 | 1098 | |
45d6a902 AM |
1099 | /* Now that all the symbols from this input file are created, handle |
1100 | .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */ | |
1101 | if (nondeflt_vers != NULL) | |
1102 | { | |
1103 | bfd_size_type cnt, symidx; | |
391a809a | 1104 | |
45d6a902 | 1105 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) |
ea44b734 | 1106 | { |
45d6a902 AM |
1107 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; |
1108 | char *shortname, *p; | |
ea44b734 | 1109 | |
45d6a902 AM |
1110 | p = strchr (h->root.root.string, ELF_VER_CHR); |
1111 | if (p == NULL | |
1112 | || (h->root.type != bfd_link_hash_defined | |
1113 | && h->root.type != bfd_link_hash_defweak)) | |
1114 | continue; | |
31941635 | 1115 | |
45d6a902 AM |
1116 | amt = p - h->root.root.string; |
1117 | shortname = bfd_malloc (amt + 1); | |
1118 | memcpy (shortname, h->root.root.string, amt); | |
1119 | shortname[amt] = '\0'; | |
31941635 | 1120 | |
45d6a902 | 1121 | hi = (struct elf_link_hash_entry *) |
0eddce27 | 1122 | bfd_link_hash_lookup (&hash_table->root, shortname, |
45d6a902 AM |
1123 | FALSE, FALSE, FALSE); |
1124 | if (hi != NULL | |
1125 | && hi->root.type == h->root.type | |
1126 | && hi->root.u.def.value == h->root.u.def.value | |
1127 | && hi->root.u.def.section == h->root.u.def.section) | |
1128 | { | |
1129 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
1130 | hi->root.type = bfd_link_hash_indirect; | |
1131 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
1132 | (*bed->elf_backend_copy_indirect_symbol) (bed, h, hi); | |
1133 | sym_hash = elf_sym_hashes (abfd); | |
1134 | if (sym_hash) | |
1135 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
1136 | if (sym_hash[symidx] == hi) | |
1137 | { | |
1138 | sym_hash[symidx] = h; | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | free (shortname); | |
1143 | } | |
1144 | free (nondeflt_vers); | |
1145 | nondeflt_vers = NULL; | |
1146 | } | |
31941635 | 1147 | |
45d6a902 AM |
1148 | if (extversym != NULL) |
1149 | { | |
1150 | free (extversym); | |
1151 | extversym = NULL; | |
1152 | } | |
31941635 | 1153 | |
45d6a902 AM |
1154 | if (isymbuf != NULL) |
1155 | free (isymbuf); | |
1156 | isymbuf = NULL; | |
31941635 | 1157 | |
45d6a902 AM |
1158 | /* Now set the weakdefs field correctly for all the weak defined |
1159 | symbols we found. The only way to do this is to search all the | |
1160 | symbols. Since we only need the information for non functions in | |
1161 | dynamic objects, that's the only time we actually put anything on | |
1162 | the list WEAKS. We need this information so that if a regular | |
1163 | object refers to a symbol defined weakly in a dynamic object, the | |
1164 | real symbol in the dynamic object is also put in the dynamic | |
1165 | symbols; we also must arrange for both symbols to point to the | |
1166 | same memory location. We could handle the general case of symbol | |
1167 | aliasing, but a general symbol alias can only be generated in | |
1168 | assembler code, handling it correctly would be very time | |
1169 | consuming, and other ELF linkers don't handle general aliasing | |
1170 | either. */ | |
b60d7a1a | 1171 | if (weaks != NULL) |
45d6a902 | 1172 | { |
45d6a902 AM |
1173 | struct elf_link_hash_entry **hpp; |
1174 | struct elf_link_hash_entry **hppend; | |
b60d7a1a L |
1175 | struct elf_link_hash_entry **sorted_sym_hash; |
1176 | struct elf_link_hash_entry *h; | |
1177 | size_t sym_count; | |
252b5132 | 1178 | |
b60d7a1a L |
1179 | /* Since we have to search the whole symbol list for each weak |
1180 | defined symbol, search time for N weak defined symbols will be | |
1181 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
1182 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
1183 | sorted_sym_hash = bfd_malloc (amt); | |
1184 | if (sorted_sym_hash == NULL) | |
1185 | goto error_return; | |
1186 | sym_hash = sorted_sym_hash; | |
45d6a902 AM |
1187 | hpp = elf_sym_hashes (abfd); |
1188 | hppend = hpp + extsymcount; | |
b60d7a1a | 1189 | sym_count = 0; |
45d6a902 | 1190 | for (; hpp < hppend; hpp++) |
31941635 | 1191 | { |
45d6a902 | 1192 | h = *hpp; |
b60d7a1a | 1193 | if (h != NULL |
45d6a902 | 1194 | && h->root.type == bfd_link_hash_defined |
b60d7a1a | 1195 | && h->type != STT_FUNC) |
31941635 | 1196 | { |
b60d7a1a L |
1197 | *sym_hash = h; |
1198 | sym_hash++; | |
1199 | sym_count++; | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | qsort (sorted_sym_hash, sym_count, | |
1204 | sizeof (struct elf_link_hash_entry *), | |
1205 | sort_symbol); | |
252b5132 | 1206 | |
b60d7a1a L |
1207 | while (weaks != NULL) |
1208 | { | |
1209 | struct elf_link_hash_entry *hlook; | |
1210 | asection *slook; | |
1211 | bfd_vma vlook; | |
1212 | long ilook; | |
1213 | size_t i, j, idx; | |
1214 | ||
1215 | hlook = weaks; | |
1216 | weaks = hlook->weakdef; | |
1217 | hlook->weakdef = NULL; | |
1218 | ||
1219 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
1220 | || hlook->root.type == bfd_link_hash_defweak | |
1221 | || hlook->root.type == bfd_link_hash_common | |
1222 | || hlook->root.type == bfd_link_hash_indirect); | |
1223 | slook = hlook->root.u.def.section; | |
1224 | vlook = hlook->root.u.def.value; | |
1225 | ||
1226 | ilook = -1; | |
1227 | i = 0; | |
1228 | j = sym_count; | |
1229 | while (i < j) | |
1230 | { | |
1231 | bfd_signed_vma vdiff; | |
1232 | idx = (i + j) / 2; | |
1233 | h = sorted_sym_hash [idx]; | |
1234 | vdiff = vlook - h->root.u.def.value; | |
1235 | if (vdiff < 0) | |
1236 | j = idx; | |
1237 | else if (vdiff > 0) | |
1238 | i = idx + 1; | |
1239 | else | |
45d6a902 | 1240 | { |
b60d7a1a L |
1241 | long sdiff = slook - h->root.u.def.section; |
1242 | if (sdiff < 0) | |
1243 | j = idx; | |
1244 | else if (sdiff > 0) | |
1245 | i = idx + 1; | |
1246 | else | |
1247 | { | |
1248 | ilook = idx; | |
1249 | break; | |
1250 | } | |
45d6a902 | 1251 | } |
b60d7a1a L |
1252 | } |
1253 | ||
1254 | /* We didn't find a value/section match. */ | |
1255 | if (ilook == -1) | |
1256 | continue; | |
1257 | ||
1258 | for (i = ilook; i < sym_count; i++) | |
1259 | { | |
1260 | h = sorted_sym_hash [i]; | |
f0c2e336 | 1261 | |
b60d7a1a L |
1262 | /* Stop if value or section doesn't match. */ |
1263 | if (h->root.u.def.value != vlook | |
1264 | || h->root.u.def.section != slook) | |
1265 | break; | |
1266 | else if (h != hlook) | |
45d6a902 | 1267 | { |
b60d7a1a L |
1268 | hlook->weakdef = h; |
1269 | ||
1270 | /* If the weak definition is in the list of dynamic | |
1271 | symbols, make sure the real definition is put | |
1272 | there as well. */ | |
1273 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
1274 | { | |
1275 | if (! _bfd_elf_link_record_dynamic_symbol (info, | |
1276 | h)) | |
1277 | goto error_return; | |
1278 | } | |
1279 | ||
1280 | /* If the real definition is in the list of dynamic | |
1281 | symbols, make sure the weak definition is put | |
1282 | there as well. If we don't do this, then the | |
1283 | dynamic loader might not merge the entries for the | |
1284 | real definition and the weak definition. */ | |
1285 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
1286 | { | |
1287 | if (! _bfd_elf_link_record_dynamic_symbol (info, | |
1288 | hlook)) | |
1289 | goto error_return; | |
1290 | } | |
1291 | break; | |
45d6a902 | 1292 | } |
45d6a902 | 1293 | } |
252b5132 | 1294 | } |
b60d7a1a L |
1295 | |
1296 | free (sorted_sym_hash); | |
45d6a902 | 1297 | } |
f0c2e336 | 1298 | |
45d6a902 AM |
1299 | /* If this object is the same format as the output object, and it is |
1300 | not a shared library, then let the backend look through the | |
1301 | relocs. | |
fa7ea4d8 | 1302 | |
45d6a902 AM |
1303 | This is required to build global offset table entries and to |
1304 | arrange for dynamic relocs. It is not required for the | |
1305 | particular common case of linking non PIC code, even when linking | |
1306 | against shared libraries, but unfortunately there is no way of | |
1307 | knowing whether an object file has been compiled PIC or not. | |
1308 | Looking through the relocs is not particularly time consuming. | |
1309 | The problem is that we must either (1) keep the relocs in memory, | |
1310 | which causes the linker to require additional runtime memory or | |
1311 | (2) read the relocs twice from the input file, which wastes time. | |
1312 | This would be a good case for using mmap. | |
60166579 | 1313 | |
45d6a902 AM |
1314 | I have no idea how to handle linking PIC code into a file of a |
1315 | different format. It probably can't be done. */ | |
1316 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
1317 | if (! dynamic | |
0eddce27 AM |
1318 | && is_elf_hash_table (hash_table) |
1319 | && hash_table->root.creator == abfd->xvec | |
45d6a902 AM |
1320 | && check_relocs != NULL) |
1321 | { | |
1322 | asection *o; | |
fa7ea4d8 | 1323 | |
45d6a902 | 1324 | for (o = abfd->sections; o != NULL; o = o->next) |
fa7ea4d8 | 1325 | { |
45d6a902 AM |
1326 | Elf_Internal_Rela *internal_relocs; |
1327 | bfd_boolean ok; | |
1328 | ||
1329 | if ((o->flags & SEC_RELOC) == 0 | |
1330 | || o->reloc_count == 0 | |
1331 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
1332 | && (o->flags & SEC_DEBUGGING) != 0) | |
1333 | || bfd_is_abs_section (o->output_section)) | |
1334 | continue; | |
1335 | ||
268b6b39 AM |
1336 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, |
1337 | info->keep_memory); | |
45d6a902 AM |
1338 | if (internal_relocs == NULL) |
1339 | goto error_return; | |
1340 | ||
1341 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
1342 | ||
1343 | if (elf_section_data (o)->relocs != internal_relocs) | |
1344 | free (internal_relocs); | |
1345 | ||
1346 | if (! ok) | |
1347 | goto error_return; | |
fa7ea4d8 | 1348 | } |
45d6a902 | 1349 | } |
30831527 | 1350 | |
45d6a902 AM |
1351 | /* If this is a non-traditional link, try to optimize the handling |
1352 | of the .stab/.stabstr sections. */ | |
1353 | if (! dynamic | |
1354 | && ! info->traditional_format | |
0eddce27 | 1355 | && is_elf_hash_table (hash_table) |
45d6a902 AM |
1356 | && (info->strip != strip_all && info->strip != strip_debugger)) |
1357 | { | |
29ca8dc5 | 1358 | asection *stabstr; |
79349b09 | 1359 | |
29ca8dc5 NS |
1360 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); |
1361 | if (stabstr != NULL) | |
fc8c40a0 | 1362 | { |
29ca8dc5 NS |
1363 | bfd_size_type string_offset = 0; |
1364 | asection *stab; | |
1365 | ||
1366 | for (stab = abfd->sections; stab; stab = stab->next) | |
1367 | if (strncmp (".stab", stab->name, 5) == 0 | |
1368 | && (!stab->name[5] || | |
1369 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
1370 | && (stab->flags & SEC_MERGE) == 0 | |
1371 | && !bfd_is_abs_section (stab->output_section)) | |
1372 | { | |
1373 | struct bfd_elf_section_data *secdata; | |
79349b09 | 1374 | |
29ca8dc5 NS |
1375 | secdata = elf_section_data (stab); |
1376 | if (! _bfd_link_section_stabs (abfd, | |
1377 | & hash_table->stab_info, | |
1378 | stab, stabstr, | |
1379 | &secdata->sec_info, | |
1380 | &string_offset)) | |
1381 | goto error_return; | |
1382 | if (secdata->sec_info) | |
1383 | stab->sec_info_type = ELF_INFO_TYPE_STABS; | |
45d6a902 | 1384 | } |
fc8c40a0 | 1385 | } |
252b5132 RH |
1386 | } |
1387 | ||
0eddce27 AM |
1388 | if (! info->relocatable |
1389 | && ! dynamic | |
1390 | && is_elf_hash_table (hash_table)) | |
252b5132 | 1391 | { |
252b5132 | 1392 | asection *s; |
252b5132 | 1393 | |
45d6a902 AM |
1394 | for (s = abfd->sections; s != NULL; s = s->next) |
1395 | if ((s->flags & SEC_MERGE) != 0 | |
1396 | && !bfd_is_abs_section (s->output_section)) | |
1397 | { | |
1398 | struct bfd_elf_section_data *secdata; | |
252b5132 | 1399 | |
45d6a902 AM |
1400 | secdata = elf_section_data (s); |
1401 | if (! _bfd_merge_section (abfd, | |
1402 | & hash_table->merge_info, | |
1403 | s, &secdata->sec_info)) | |
1404 | goto error_return; | |
1405 | else if (secdata->sec_info) | |
1406 | s->sec_info_type = ELF_INFO_TYPE_MERGE; | |
1407 | } | |
1408 | } | |
252b5132 | 1409 | |
0eddce27 | 1410 | if (is_elf_hash_table (hash_table)) |
45d6a902 AM |
1411 | { |
1412 | /* Add this bfd to the loaded list. */ | |
1413 | struct elf_link_loaded_list *n; | |
6b9b879a | 1414 | |
268b6b39 | 1415 | n = bfd_alloc (abfd, sizeof (struct elf_link_loaded_list)); |
45d6a902 AM |
1416 | if (n == NULL) |
1417 | goto error_return; | |
1418 | n->abfd = abfd; | |
1419 | n->next = hash_table->loaded; | |
1420 | hash_table->loaded = n; | |
1421 | } | |
252b5132 | 1422 | |
45d6a902 | 1423 | return TRUE; |
252b5132 | 1424 | |
45d6a902 AM |
1425 | error_free_vers: |
1426 | if (nondeflt_vers != NULL) | |
1427 | free (nondeflt_vers); | |
1428 | if (extversym != NULL) | |
1429 | free (extversym); | |
1430 | error_free_sym: | |
1431 | if (isymbuf != NULL) | |
1432 | free (isymbuf); | |
1433 | error_return: | |
1434 | return FALSE; | |
1435 | } | |
252b5132 | 1436 | |
45d6a902 | 1437 | /* Add an entry to the .dynamic table. */ |
252b5132 | 1438 | |
45d6a902 | 1439 | bfd_boolean |
268b6b39 | 1440 | elf_add_dynamic_entry (struct bfd_link_info *info, bfd_vma tag, bfd_vma val) |
45d6a902 AM |
1441 | { |
1442 | Elf_Internal_Dyn dyn; | |
1443 | bfd *dynobj; | |
1444 | asection *s; | |
1445 | bfd_size_type newsize; | |
1446 | bfd_byte *newcontents; | |
252b5132 | 1447 | |
0eddce27 | 1448 | if (! is_elf_hash_table (info->hash)) |
45d6a902 | 1449 | return FALSE; |
252b5132 | 1450 | |
45d6a902 AM |
1451 | dynobj = elf_hash_table (info)->dynobj; |
1452 | ||
1453 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1454 | BFD_ASSERT (s != NULL); | |
1455 | ||
1456 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
268b6b39 | 1457 | newcontents = bfd_realloc (s->contents, newsize); |
45d6a902 AM |
1458 | if (newcontents == NULL) |
1459 | return FALSE; | |
1460 | ||
1461 | dyn.d_tag = tag; | |
1462 | dyn.d_un.d_val = val; | |
1463 | elf_swap_dyn_out (dynobj, &dyn, | |
1464 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
1465 | ||
1466 | s->_raw_size = newsize; | |
1467 | s->contents = newcontents; | |
1468 | ||
1469 | return TRUE; | |
1470 | } | |
1471 | \f | |
1472 | /* Array used to determine the number of hash table buckets to use | |
1473 | based on the number of symbols there are. If there are fewer than | |
1474 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
1475 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
1476 | than 32771 buckets. */ | |
252b5132 | 1477 | |
45d6a902 AM |
1478 | static const size_t elf_buckets[] = |
1479 | { | |
1480 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
1481 | 16411, 32771, 0 | |
1482 | }; | |
252b5132 | 1483 | |
45d6a902 AM |
1484 | /* Compute bucket count for hashing table. We do not use a static set |
1485 | of possible tables sizes anymore. Instead we determine for all | |
1486 | possible reasonable sizes of the table the outcome (i.e., the | |
1487 | number of collisions etc) and choose the best solution. The | |
1488 | weighting functions are not too simple to allow the table to grow | |
1489 | without bounds. Instead one of the weighting factors is the size. | |
1490 | Therefore the result is always a good payoff between few collisions | |
1491 | (= short chain lengths) and table size. */ | |
1492 | static size_t | |
268b6b39 | 1493 | compute_bucket_count (struct bfd_link_info *info) |
45d6a902 AM |
1494 | { |
1495 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; | |
1496 | size_t best_size = 0; | |
1497 | unsigned long int *hashcodes; | |
1498 | unsigned long int *hashcodesp; | |
1499 | unsigned long int i; | |
1500 | bfd_size_type amt; | |
252b5132 | 1501 | |
45d6a902 AM |
1502 | /* Compute the hash values for all exported symbols. At the same |
1503 | time store the values in an array so that we could use them for | |
1504 | optimizations. */ | |
1505 | amt = dynsymcount; | |
1506 | amt *= sizeof (unsigned long int); | |
268b6b39 | 1507 | hashcodes = bfd_malloc (amt); |
45d6a902 AM |
1508 | if (hashcodes == NULL) |
1509 | return 0; | |
1510 | hashcodesp = hashcodes; | |
252b5132 | 1511 | |
45d6a902 AM |
1512 | /* Put all hash values in HASHCODES. */ |
1513 | elf_link_hash_traverse (elf_hash_table (info), | |
1514 | elf_collect_hash_codes, &hashcodesp); | |
252b5132 | 1515 | |
45d6a902 AM |
1516 | /* We have a problem here. The following code to optimize the table |
1517 | size requires an integer type with more the 32 bits. If | |
1518 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
1519 | #ifdef BFD_HOST_U_64_BIT | |
1520 | if (info->optimize) | |
1521 | { | |
1522 | unsigned long int nsyms = hashcodesp - hashcodes; | |
1523 | size_t minsize; | |
1524 | size_t maxsize; | |
1525 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
1526 | unsigned long int *counts ; | |
252b5132 | 1527 | |
45d6a902 AM |
1528 | /* Possible optimization parameters: if we have NSYMS symbols we say |
1529 | that the hashing table must at least have NSYMS/4 and at most | |
1530 | 2*NSYMS buckets. */ | |
1531 | minsize = nsyms / 4; | |
1532 | if (minsize == 0) | |
1533 | minsize = 1; | |
1534 | best_size = maxsize = nsyms * 2; | |
252b5132 | 1535 | |
45d6a902 AM |
1536 | /* Create array where we count the collisions in. We must use bfd_malloc |
1537 | since the size could be large. */ | |
1538 | amt = maxsize; | |
1539 | amt *= sizeof (unsigned long int); | |
268b6b39 | 1540 | counts = bfd_malloc (amt); |
45d6a902 AM |
1541 | if (counts == NULL) |
1542 | { | |
1543 | free (hashcodes); | |
1544 | return 0; | |
1545 | } | |
252b5132 | 1546 | |
45d6a902 AM |
1547 | /* Compute the "optimal" size for the hash table. The criteria is a |
1548 | minimal chain length. The minor criteria is (of course) the size | |
1549 | of the table. */ | |
1550 | for (i = minsize; i < maxsize; ++i) | |
1551 | { | |
1552 | /* Walk through the array of hashcodes and count the collisions. */ | |
1553 | BFD_HOST_U_64_BIT max; | |
1554 | unsigned long int j; | |
1555 | unsigned long int fact; | |
252b5132 | 1556 | |
45d6a902 | 1557 | memset (counts, '\0', i * sizeof (unsigned long int)); |
252b5132 | 1558 | |
45d6a902 AM |
1559 | /* Determine how often each hash bucket is used. */ |
1560 | for (j = 0; j < nsyms; ++j) | |
1561 | ++counts[hashcodes[j] % i]; | |
252b5132 | 1562 | |
45d6a902 AM |
1563 | /* For the weight function we need some information about the |
1564 | pagesize on the target. This is information need not be 100% | |
1565 | accurate. Since this information is not available (so far) we | |
1566 | define it here to a reasonable default value. If it is crucial | |
1567 | to have a better value some day simply define this value. */ | |
1568 | # ifndef BFD_TARGET_PAGESIZE | |
1569 | # define BFD_TARGET_PAGESIZE (4096) | |
1570 | # endif | |
252b5132 | 1571 | |
45d6a902 AM |
1572 | /* We in any case need 2 + NSYMS entries for the size values and |
1573 | the chains. */ | |
1574 | max = (2 + nsyms) * (ARCH_SIZE / 8); | |
252b5132 | 1575 | |
45d6a902 AM |
1576 | # if 1 |
1577 | /* Variant 1: optimize for short chains. We add the squares | |
4cc11e76 | 1578 | of all the chain lengths (which favors many small chain |
45d6a902 AM |
1579 | over a few long chains). */ |
1580 | for (j = 0; j < i; ++j) | |
1581 | max += counts[j] * counts[j]; | |
252b5132 | 1582 | |
45d6a902 AM |
1583 | /* This adds penalties for the overall size of the table. */ |
1584 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
1585 | max *= fact * fact; | |
1586 | # else | |
1587 | /* Variant 2: Optimize a lot more for small table. Here we | |
1588 | also add squares of the size but we also add penalties for | |
1589 | empty slots (the +1 term). */ | |
1590 | for (j = 0; j < i; ++j) | |
1591 | max += (1 + counts[j]) * (1 + counts[j]); | |
252b5132 | 1592 | |
45d6a902 AM |
1593 | /* The overall size of the table is considered, but not as |
1594 | strong as in variant 1, where it is squared. */ | |
1595 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
1596 | max *= fact; | |
1597 | # endif | |
252b5132 | 1598 | |
45d6a902 AM |
1599 | /* Compare with current best results. */ |
1600 | if (max < best_chlen) | |
1601 | { | |
1602 | best_chlen = max; | |
1603 | best_size = i; | |
252b5132 | 1604 | } |
d6cf2879 L |
1605 | } |
1606 | ||
45d6a902 AM |
1607 | free (counts); |
1608 | } | |
1609 | else | |
1610 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
1611 | { | |
1612 | /* This is the fallback solution if no 64bit type is available or if we | |
1613 | are not supposed to spend much time on optimizations. We select the | |
1614 | bucket count using a fixed set of numbers. */ | |
1615 | for (i = 0; elf_buckets[i] != 0; i++) | |
d6cf2879 | 1616 | { |
45d6a902 AM |
1617 | best_size = elf_buckets[i]; |
1618 | if (dynsymcount < elf_buckets[i + 1]) | |
1619 | break; | |
d6cf2879 | 1620 | } |
45d6a902 | 1621 | } |
d6cf2879 | 1622 | |
45d6a902 AM |
1623 | /* Free the arrays we needed. */ |
1624 | free (hashcodes); | |
252b5132 | 1625 | |
45d6a902 AM |
1626 | return best_size; |
1627 | } | |
252b5132 | 1628 | |
45d6a902 AM |
1629 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
1630 | called by the ELF linker emulation before_allocation routine. We | |
1631 | must set the sizes of the sections before the linker sets the | |
1632 | addresses of the various sections. */ | |
252b5132 | 1633 | |
45d6a902 | 1634 | bfd_boolean |
268b6b39 AM |
1635 | NAME(bfd_elf,size_dynamic_sections) (bfd *output_bfd, |
1636 | const char *soname, | |
1637 | const char *rpath, | |
1638 | const char *filter_shlib, | |
1639 | const char * const *auxiliary_filters, | |
1640 | struct bfd_link_info *info, | |
1641 | asection **sinterpptr, | |
1642 | struct bfd_elf_version_tree *verdefs) | |
45d6a902 AM |
1643 | { |
1644 | bfd_size_type soname_indx; | |
1645 | bfd *dynobj; | |
9c5bfbb7 | 1646 | const struct elf_backend_data *bed; |
45d6a902 | 1647 | struct elf_assign_sym_version_info asvinfo; |
252b5132 | 1648 | |
45d6a902 | 1649 | *sinterpptr = NULL; |
252b5132 | 1650 | |
45d6a902 | 1651 | soname_indx = (bfd_size_type) -1; |
252b5132 | 1652 | |
0eddce27 | 1653 | if (!is_elf_hash_table (info->hash)) |
45d6a902 | 1654 | return TRUE; |
252b5132 | 1655 | |
9ee5e499 JJ |
1656 | if (info->execstack) |
1657 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X; | |
1658 | else if (info->noexecstack) | |
1659 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W; | |
1660 | else | |
1661 | { | |
1662 | bfd *inputobj; | |
1663 | asection *notesec = NULL; | |
1664 | int exec = 0; | |
1665 | ||
1666 | for (inputobj = info->input_bfds; | |
1667 | inputobj; | |
1668 | inputobj = inputobj->link_next) | |
1669 | { | |
1670 | asection *s; | |
1671 | ||
1672 | if (inputobj->flags & DYNAMIC) | |
1673 | continue; | |
1674 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); | |
1675 | if (s) | |
1676 | { | |
1677 | if (s->flags & SEC_CODE) | |
1678 | exec = PF_X; | |
1679 | notesec = s; | |
1680 | } | |
1681 | else | |
1682 | exec = PF_X; | |
1683 | } | |
1684 | if (notesec) | |
1685 | { | |
1686 | elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | exec; | |
1049f94e | 1687 | if (exec && info->relocatable |
9ee5e499 JJ |
1688 | && notesec->output_section != bfd_abs_section_ptr) |
1689 | notesec->output_section->flags |= SEC_CODE; | |
1690 | } | |
1691 | } | |
1692 | ||
45d6a902 AM |
1693 | /* Any syms created from now on start with -1 in |
1694 | got.refcount/offset and plt.refcount/offset. */ | |
1695 | elf_hash_table (info)->init_refcount = elf_hash_table (info)->init_offset; | |
252b5132 | 1696 | |
45d6a902 AM |
1697 | /* The backend may have to create some sections regardless of whether |
1698 | we're dynamic or not. */ | |
1699 | bed = get_elf_backend_data (output_bfd); | |
1700 | if (bed->elf_backend_always_size_sections | |
1701 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
1702 | return FALSE; | |
252b5132 | 1703 | |
45d6a902 | 1704 | dynobj = elf_hash_table (info)->dynobj; |
252b5132 | 1705 | |
45d6a902 AM |
1706 | /* If there were no dynamic objects in the link, there is nothing to |
1707 | do here. */ | |
1708 | if (dynobj == NULL) | |
1709 | return TRUE; | |
252b5132 | 1710 | |
45d6a902 AM |
1711 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
1712 | return FALSE; | |
252b5132 | 1713 | |
45d6a902 AM |
1714 | if (elf_hash_table (info)->dynamic_sections_created) |
1715 | { | |
1716 | struct elf_info_failed eif; | |
1717 | struct elf_link_hash_entry *h; | |
1718 | asection *dynstr; | |
1719 | struct bfd_elf_version_tree *t; | |
1720 | struct bfd_elf_version_expr *d; | |
1721 | bfd_boolean all_defined; | |
30b30c21 | 1722 | |
45d6a902 | 1723 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); |
893c4fe2 | 1724 | BFD_ASSERT (*sinterpptr != NULL || !info->executable); |
252b5132 | 1725 | |
45d6a902 | 1726 | if (soname != NULL) |
252b5132 | 1727 | { |
45d6a902 AM |
1728 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
1729 | soname, TRUE); | |
1730 | if (soname_indx == (bfd_size_type) -1 | |
268b6b39 | 1731 | || ! elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) |
45d6a902 | 1732 | return FALSE; |
252b5132 | 1733 | } |
45d6a902 AM |
1734 | |
1735 | if (info->symbolic) | |
252b5132 | 1736 | { |
268b6b39 | 1737 | if (! elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) |
b34976b6 | 1738 | return FALSE; |
45d6a902 AM |
1739 | info->flags |= DF_SYMBOLIC; |
1740 | } | |
252b5132 | 1741 | |
45d6a902 AM |
1742 | if (rpath != NULL) |
1743 | { | |
1744 | bfd_size_type indx; | |
1745 | ||
1746 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
1747 | TRUE); | |
1748 | if (info->new_dtags) | |
1749 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, indx); | |
1750 | if (indx == (bfd_size_type) -1 | |
268b6b39 | 1751 | || ! elf_add_dynamic_entry (info, DT_RPATH, indx) |
45d6a902 | 1752 | || (info->new_dtags |
268b6b39 | 1753 | && ! elf_add_dynamic_entry (info, DT_RUNPATH, indx))) |
b34976b6 | 1754 | return FALSE; |
252b5132 RH |
1755 | } |
1756 | ||
45d6a902 | 1757 | if (filter_shlib != NULL) |
fc8c40a0 | 1758 | { |
45d6a902 | 1759 | bfd_size_type indx; |
fc8c40a0 | 1760 | |
45d6a902 AM |
1761 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
1762 | filter_shlib, TRUE); | |
1763 | if (indx == (bfd_size_type) -1 | |
268b6b39 | 1764 | || ! elf_add_dynamic_entry (info, DT_FILTER, indx)) |
45d6a902 | 1765 | return FALSE; |
fc8c40a0 | 1766 | } |
252b5132 | 1767 | |
45d6a902 AM |
1768 | if (auxiliary_filters != NULL) |
1769 | { | |
1770 | const char * const *p; | |
252b5132 | 1771 | |
45d6a902 AM |
1772 | for (p = auxiliary_filters; *p != NULL; p++) |
1773 | { | |
1774 | bfd_size_type indx; | |
1775 | ||
1776 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
1777 | *p, TRUE); | |
1778 | if (indx == (bfd_size_type) -1 | |
268b6b39 | 1779 | || ! elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) |
45d6a902 AM |
1780 | return FALSE; |
1781 | } | |
1782 | } | |
1783 | ||
1784 | eif.info = info; | |
1785 | eif.verdefs = verdefs; | |
1786 | eif.failed = FALSE; | |
252b5132 | 1787 | |
45d6a902 AM |
1788 | /* If we are supposed to export all symbols into the dynamic symbol |
1789 | table (this is not the normal case), then do so. */ | |
1790 | if (info->export_dynamic) | |
1791 | { | |
1792 | elf_link_hash_traverse (elf_hash_table (info), | |
1793 | _bfd_elf_export_symbol, | |
268b6b39 | 1794 | &eif); |
45d6a902 AM |
1795 | if (eif.failed) |
1796 | return FALSE; | |
1797 | } | |
252b5132 | 1798 | |
4cc11e76 | 1799 | /* Make all global versions with definition. */ |
45d6a902 | 1800 | for (t = verdefs; t != NULL; t = t->next) |
108ba305 | 1801 | for (d = t->globals.list; d != NULL; d = d->next) |
5e35cbc2 | 1802 | if (!d->symver && d->symbol) |
45d6a902 AM |
1803 | { |
1804 | const char *verstr, *name; | |
1805 | size_t namelen, verlen, newlen; | |
1806 | char *newname, *p; | |
1807 | struct elf_link_hash_entry *newh; | |
252b5132 | 1808 | |
5e35cbc2 | 1809 | name = d->symbol; |
45d6a902 AM |
1810 | namelen = strlen (name); |
1811 | verstr = t->name; | |
1812 | verlen = strlen (verstr); | |
1813 | newlen = namelen + verlen + 3; | |
2b0f7ef9 | 1814 | |
268b6b39 | 1815 | newname = bfd_malloc (newlen); |
45d6a902 AM |
1816 | if (newname == NULL) |
1817 | return FALSE; | |
1818 | memcpy (newname, name, namelen); | |
2b0f7ef9 | 1819 | |
45d6a902 AM |
1820 | /* Check the hidden versioned definition. */ |
1821 | p = newname + namelen; | |
1822 | *p++ = ELF_VER_CHR; | |
1823 | memcpy (p, verstr, verlen + 1); | |
1824 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
1825 | newname, FALSE, FALSE, | |
1826 | FALSE); | |
1827 | if (newh == NULL | |
1828 | || (newh->root.type != bfd_link_hash_defined | |
1829 | && newh->root.type != bfd_link_hash_defweak)) | |
1830 | { | |
1831 | /* Check the default versioned definition. */ | |
1832 | *p++ = ELF_VER_CHR; | |
1833 | memcpy (p, verstr, verlen + 1); | |
1834 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
1835 | newname, FALSE, FALSE, | |
1836 | FALSE); | |
1837 | } | |
1838 | free (newname); | |
252b5132 | 1839 | |
45d6a902 AM |
1840 | /* Mark this version if there is a definition and it is |
1841 | not defined in a shared object. */ | |
1842 | if (newh != NULL | |
1843 | && ((newh->elf_link_hash_flags | |
1844 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0) | |
1845 | && (newh->root.type == bfd_link_hash_defined | |
1846 | || newh->root.type == bfd_link_hash_defweak)) | |
1847 | d->symver = 1; | |
1848 | } | |
252b5132 | 1849 | |
45d6a902 AM |
1850 | /* Attach all the symbols to their version information. */ |
1851 | asvinfo.output_bfd = output_bfd; | |
1852 | asvinfo.info = info; | |
1853 | asvinfo.verdefs = verdefs; | |
1854 | asvinfo.failed = FALSE; | |
c44233aa | 1855 | |
45d6a902 AM |
1856 | elf_link_hash_traverse (elf_hash_table (info), |
1857 | _bfd_elf_link_assign_sym_version, | |
268b6b39 | 1858 | &asvinfo); |
45d6a902 AM |
1859 | if (asvinfo.failed) |
1860 | return FALSE; | |
c44233aa | 1861 | |
45d6a902 AM |
1862 | if (!info->allow_undefined_version) |
1863 | { | |
4cc11e76 | 1864 | /* Check if all global versions have a definition. */ |
45d6a902 AM |
1865 | all_defined = TRUE; |
1866 | for (t = verdefs; t != NULL; t = t->next) | |
108ba305 | 1867 | for (d = t->globals.list; d != NULL; d = d->next) |
3e0e1ef1 | 1868 | if (!d->symver && !d->script) |
45d6a902 AM |
1869 | { |
1870 | (*_bfd_error_handler) | |
1871 | (_("%s: undefined version: %s"), | |
1872 | d->pattern, t->name); | |
1873 | all_defined = FALSE; | |
1874 | } | |
2b0f7ef9 | 1875 | |
45d6a902 AM |
1876 | if (!all_defined) |
1877 | { | |
1878 | bfd_set_error (bfd_error_bad_value); | |
1879 | return FALSE; | |
1880 | } | |
1881 | } | |
e92d460e | 1882 | |
45d6a902 AM |
1883 | /* Find all symbols which were defined in a dynamic object and make |
1884 | the backend pick a reasonable value for them. */ | |
1885 | elf_link_hash_traverse (elf_hash_table (info), | |
1886 | _bfd_elf_adjust_dynamic_symbol, | |
268b6b39 | 1887 | &eif); |
45d6a902 AM |
1888 | if (eif.failed) |
1889 | return FALSE; | |
2b0f7ef9 | 1890 | |
45d6a902 AM |
1891 | /* Add some entries to the .dynamic section. We fill in some of the |
1892 | values later, in elf_bfd_final_link, but we must add the entries | |
1893 | now so that we know the final size of the .dynamic section. */ | |
2b0f7ef9 | 1894 | |
45d6a902 AM |
1895 | /* If there are initialization and/or finalization functions to |
1896 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
1897 | h = (info->init_function | |
1898 | ? elf_link_hash_lookup (elf_hash_table (info), | |
1899 | info->init_function, FALSE, | |
1900 | FALSE, FALSE) | |
1901 | : NULL); | |
1902 | if (h != NULL | |
1903 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
1904 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
1905 | { | |
268b6b39 | 1906 | if (! elf_add_dynamic_entry (info, DT_INIT, 0)) |
45d6a902 AM |
1907 | return FALSE; |
1908 | } | |
1909 | h = (info->fini_function | |
1910 | ? elf_link_hash_lookup (elf_hash_table (info), | |
1911 | info->fini_function, FALSE, | |
1912 | FALSE, FALSE) | |
1913 | : NULL); | |
1914 | if (h != NULL | |
1915 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
1916 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
1917 | { | |
268b6b39 | 1918 | if (! elf_add_dynamic_entry (info, DT_FINI, 0)) |
45d6a902 AM |
1919 | return FALSE; |
1920 | } | |
2b0f7ef9 | 1921 | |
45d6a902 AM |
1922 | if (bfd_get_section_by_name (output_bfd, ".preinit_array") != NULL) |
1923 | { | |
1924 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
36af4a4e | 1925 | if (! info->executable) |
45d6a902 AM |
1926 | { |
1927 | bfd *sub; | |
1928 | asection *o; | |
2b0f7ef9 | 1929 | |
45d6a902 AM |
1930 | for (sub = info->input_bfds; sub != NULL; |
1931 | sub = sub->link_next) | |
1932 | for (o = sub->sections; o != NULL; o = o->next) | |
1933 | if (elf_section_data (o)->this_hdr.sh_type | |
1934 | == SHT_PREINIT_ARRAY) | |
1935 | { | |
1936 | (*_bfd_error_handler) | |
1937 | (_("%s: .preinit_array section is not allowed in DSO"), | |
1938 | bfd_archive_filename (sub)); | |
1939 | break; | |
1940 | } | |
2b0f7ef9 | 1941 | |
45d6a902 AM |
1942 | bfd_set_error (bfd_error_nonrepresentable_section); |
1943 | return FALSE; | |
1944 | } | |
2b0f7ef9 | 1945 | |
268b6b39 AM |
1946 | if (!elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) |
1947 | || !elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
45d6a902 AM |
1948 | return FALSE; |
1949 | } | |
1950 | if (bfd_get_section_by_name (output_bfd, ".init_array") != NULL) | |
2b0f7ef9 | 1951 | { |
268b6b39 AM |
1952 | if (!elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) |
1953 | || !elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
45d6a902 AM |
1954 | return FALSE; |
1955 | } | |
1956 | if (bfd_get_section_by_name (output_bfd, ".fini_array") != NULL) | |
1957 | { | |
268b6b39 AM |
1958 | if (!elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) |
1959 | || !elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
45d6a902 | 1960 | return FALSE; |
2b0f7ef9 | 1961 | } |
2b0f7ef9 | 1962 | |
45d6a902 AM |
1963 | dynstr = bfd_get_section_by_name (dynobj, ".dynstr"); |
1964 | /* If .dynstr is excluded from the link, we don't want any of | |
1965 | these tags. Strictly, we should be checking each section | |
1966 | individually; This quick check covers for the case where | |
1967 | someone does a /DISCARD/ : { *(*) }. */ | |
1968 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
1969 | { | |
1970 | bfd_size_type strsize; | |
1971 | ||
1972 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
268b6b39 AM |
1973 | if (! elf_add_dynamic_entry (info, DT_HASH, 0) |
1974 | || ! elf_add_dynamic_entry (info, DT_STRTAB, 0) | |
1975 | || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
1976 | || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
1977 | || ! elf_add_dynamic_entry (info, DT_SYMENT, | |
1978 | sizeof (Elf_External_Sym))) | |
45d6a902 AM |
1979 | return FALSE; |
1980 | } | |
1981 | } | |
2b0f7ef9 | 1982 | |
45d6a902 AM |
1983 | /* The backend must work out the sizes of all the other dynamic |
1984 | sections. */ | |
1985 | if (bed->elf_backend_size_dynamic_sections | |
1986 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
1987 | return FALSE; | |
2b0f7ef9 | 1988 | |
45d6a902 | 1989 | if (elf_hash_table (info)->dynamic_sections_created) |
2b0f7ef9 | 1990 | { |
45d6a902 | 1991 | bfd_size_type dynsymcount; |
2b0f7ef9 | 1992 | asection *s; |
45d6a902 AM |
1993 | size_t bucketcount = 0; |
1994 | size_t hash_entry_size; | |
1995 | unsigned int dtagcount; | |
c44233aa | 1996 | |
45d6a902 | 1997 | /* Set up the version definition section. */ |
2b0f7ef9 | 1998 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); |
45d6a902 | 1999 | BFD_ASSERT (s != NULL); |
2b0f7ef9 | 2000 | |
45d6a902 AM |
2001 | /* We may have created additional version definitions if we are |
2002 | just linking a regular application. */ | |
2003 | verdefs = asvinfo.verdefs; | |
c44233aa | 2004 | |
45d6a902 AM |
2005 | /* Skip anonymous version tag. */ |
2006 | if (verdefs != NULL && verdefs->vernum == 0) | |
2007 | verdefs = verdefs->next; | |
2008 | ||
2009 | if (verdefs == NULL) | |
2010 | _bfd_strip_section_from_output (info, s); | |
2011 | else | |
2b0f7ef9 | 2012 | { |
45d6a902 AM |
2013 | unsigned int cdefs; |
2014 | bfd_size_type size; | |
2015 | struct bfd_elf_version_tree *t; | |
2016 | bfd_byte *p; | |
2017 | Elf_Internal_Verdef def; | |
2018 | Elf_Internal_Verdaux defaux; | |
2019 | ||
2020 | cdefs = 0; | |
2021 | size = 0; | |
2022 | ||
2023 | /* Make space for the base version. */ | |
2024 | size += sizeof (Elf_External_Verdef); | |
2025 | size += sizeof (Elf_External_Verdaux); | |
2026 | ++cdefs; | |
2027 | ||
2028 | for (t = verdefs; t != NULL; t = t->next) | |
2b0f7ef9 | 2029 | { |
45d6a902 AM |
2030 | struct bfd_elf_version_deps *n; |
2031 | ||
2032 | size += sizeof (Elf_External_Verdef); | |
2033 | size += sizeof (Elf_External_Verdaux); | |
2034 | ++cdefs; | |
2035 | ||
2036 | for (n = t->deps; n != NULL; n = n->next) | |
2037 | size += sizeof (Elf_External_Verdaux); | |
2b0f7ef9 | 2038 | } |
2b0f7ef9 | 2039 | |
45d6a902 | 2040 | s->_raw_size = size; |
268b6b39 | 2041 | s->contents = bfd_alloc (output_bfd, s->_raw_size); |
45d6a902 AM |
2042 | if (s->contents == NULL && s->_raw_size != 0) |
2043 | return FALSE; | |
2b0f7ef9 | 2044 | |
45d6a902 | 2045 | /* Fill in the version definition section. */ |
252b5132 | 2046 | |
45d6a902 | 2047 | p = s->contents; |
94b6c40a | 2048 | |
45d6a902 AM |
2049 | def.vd_version = VER_DEF_CURRENT; |
2050 | def.vd_flags = VER_FLG_BASE; | |
2051 | def.vd_ndx = 1; | |
2052 | def.vd_cnt = 1; | |
2053 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2054 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2055 | + sizeof (Elf_External_Verdaux)); | |
252b5132 | 2056 | |
45d6a902 | 2057 | if (soname_indx != (bfd_size_type) -1) |
252b5132 | 2058 | { |
45d6a902 AM |
2059 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
2060 | soname_indx); | |
2061 | def.vd_hash = bfd_elf_hash (soname); | |
2062 | defaux.vda_name = soname_indx; | |
252b5132 | 2063 | } |
45d6a902 AM |
2064 | else |
2065 | { | |
2066 | const char *name; | |
2067 | bfd_size_type indx; | |
252b5132 | 2068 | |
45d6a902 AM |
2069 | name = basename (output_bfd->filename); |
2070 | def.vd_hash = bfd_elf_hash (name); | |
2071 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
2072 | name, FALSE); | |
2073 | if (indx == (bfd_size_type) -1) | |
2074 | return FALSE; | |
2075 | defaux.vda_name = indx; | |
2076 | } | |
2077 | defaux.vda_next = 0; | |
8ea2e4bd | 2078 | |
45d6a902 AM |
2079 | _bfd_elf_swap_verdef_out (output_bfd, &def, |
2080 | (Elf_External_Verdef *) p); | |
2081 | p += sizeof (Elf_External_Verdef); | |
2082 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2083 | (Elf_External_Verdaux *) p); | |
2084 | p += sizeof (Elf_External_Verdaux); | |
e5094212 | 2085 | |
45d6a902 AM |
2086 | for (t = verdefs; t != NULL; t = t->next) |
2087 | { | |
2088 | unsigned int cdeps; | |
2089 | struct bfd_elf_version_deps *n; | |
2090 | struct elf_link_hash_entry *h; | |
2091 | struct bfd_link_hash_entry *bh; | |
252b5132 | 2092 | |
45d6a902 AM |
2093 | cdeps = 0; |
2094 | for (n = t->deps; n != NULL; n = n->next) | |
2095 | ++cdeps; | |
ef5aade5 | 2096 | |
45d6a902 AM |
2097 | /* Add a symbol representing this version. */ |
2098 | bh = NULL; | |
2099 | if (! (_bfd_generic_link_add_one_symbol | |
2100 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
268b6b39 | 2101 | 0, NULL, FALSE, |
45d6a902 AM |
2102 | get_elf_backend_data (dynobj)->collect, &bh))) |
2103 | return FALSE; | |
2104 | h = (struct elf_link_hash_entry *) bh; | |
2105 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; | |
2106 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
2107 | h->type = STT_OBJECT; | |
2108 | h->verinfo.vertree = t; | |
fc4cc5bb | 2109 | |
45d6a902 AM |
2110 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) |
2111 | return FALSE; | |
2112 | ||
2113 | def.vd_version = VER_DEF_CURRENT; | |
2114 | def.vd_flags = 0; | |
108ba305 | 2115 | if (t->globals.list == NULL && t->locals.list == NULL && ! t->used) |
45d6a902 AM |
2116 | def.vd_flags |= VER_FLG_WEAK; |
2117 | def.vd_ndx = t->vernum + 1; | |
2118 | def.vd_cnt = cdeps + 1; | |
2119 | def.vd_hash = bfd_elf_hash (t->name); | |
2120 | def.vd_aux = sizeof (Elf_External_Verdef); | |
2121 | if (t->next != NULL) | |
2122 | def.vd_next = (sizeof (Elf_External_Verdef) | |
2123 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
2124 | else | |
2125 | def.vd_next = 0; | |
2126 | ||
2127 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
2128 | (Elf_External_Verdef *) p); | |
2129 | p += sizeof (Elf_External_Verdef); | |
2130 | ||
2131 | defaux.vda_name = h->dynstr_index; | |
2132 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
2133 | h->dynstr_index); | |
2134 | if (t->deps == NULL) | |
2135 | defaux.vda_next = 0; | |
2136 | else | |
2137 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2138 | t->name_indx = defaux.vda_name; | |
2139 | ||
2140 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2141 | (Elf_External_Verdaux *) p); | |
2142 | p += sizeof (Elf_External_Verdaux); | |
2143 | ||
2144 | for (n = t->deps; n != NULL; n = n->next) | |
2145 | { | |
2146 | if (n->version_needed == NULL) | |
2147 | { | |
2148 | /* This can happen if there was an error in the | |
2149 | version script. */ | |
2150 | defaux.vda_name = 0; | |
2151 | } | |
2152 | else | |
2153 | { | |
2154 | defaux.vda_name = n->version_needed->name_indx; | |
2155 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
2156 | defaux.vda_name); | |
2157 | } | |
2158 | if (n->next == NULL) | |
2159 | defaux.vda_next = 0; | |
2160 | else | |
2161 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
2162 | ||
2163 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
2164 | (Elf_External_Verdaux *) p); | |
2165 | p += sizeof (Elf_External_Verdaux); | |
2166 | } | |
2167 | } | |
2168 | ||
268b6b39 AM |
2169 | if (! elf_add_dynamic_entry (info, DT_VERDEF, 0) |
2170 | || ! elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
45d6a902 AM |
2171 | return FALSE; |
2172 | ||
2173 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
2174 | } | |
8e67855b | 2175 | |
45d6a902 | 2176 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) |
0a991dfe | 2177 | { |
268b6b39 | 2178 | if (! elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) |
45d6a902 AM |
2179 | return FALSE; |
2180 | } | |
646411fb JJ |
2181 | else if (info->flags & DF_BIND_NOW) |
2182 | { | |
2183 | if (! elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
2184 | return FALSE; | |
2185 | } | |
0a991dfe | 2186 | |
45d6a902 AM |
2187 | if (info->flags_1) |
2188 | { | |
36af4a4e | 2189 | if (info->executable) |
45d6a902 AM |
2190 | info->flags_1 &= ~ (DF_1_INITFIRST |
2191 | | DF_1_NODELETE | |
2192 | | DF_1_NOOPEN); | |
268b6b39 | 2193 | if (! elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) |
45d6a902 | 2194 | return FALSE; |
0a991dfe | 2195 | } |
fc4cc5bb | 2196 | |
45d6a902 | 2197 | /* Work out the size of the version reference section. */ |
252b5132 | 2198 | |
45d6a902 AM |
2199 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); |
2200 | BFD_ASSERT (s != NULL); | |
2201 | { | |
2202 | struct elf_find_verdep_info sinfo; | |
252b5132 | 2203 | |
45d6a902 AM |
2204 | sinfo.output_bfd = output_bfd; |
2205 | sinfo.info = info; | |
2206 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
2207 | if (sinfo.vers == 0) | |
2208 | sinfo.vers = 1; | |
2209 | sinfo.failed = FALSE; | |
252b5132 | 2210 | |
45d6a902 AM |
2211 | elf_link_hash_traverse (elf_hash_table (info), |
2212 | _bfd_elf_link_find_version_dependencies, | |
268b6b39 | 2213 | &sinfo); |
5cab59f6 | 2214 | |
45d6a902 AM |
2215 | if (elf_tdata (output_bfd)->verref == NULL) |
2216 | _bfd_strip_section_from_output (info, s); | |
2217 | else | |
2218 | { | |
2219 | Elf_Internal_Verneed *t; | |
2220 | unsigned int size; | |
2221 | unsigned int crefs; | |
2222 | bfd_byte *p; | |
e92d460e | 2223 | |
45d6a902 AM |
2224 | /* Build the version definition section. */ |
2225 | size = 0; | |
2226 | crefs = 0; | |
2227 | for (t = elf_tdata (output_bfd)->verref; | |
2228 | t != NULL; | |
2229 | t = t->vn_nextref) | |
2230 | { | |
2231 | Elf_Internal_Vernaux *a; | |
e92d460e | 2232 | |
45d6a902 AM |
2233 | size += sizeof (Elf_External_Verneed); |
2234 | ++crefs; | |
2235 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2236 | size += sizeof (Elf_External_Vernaux); | |
2237 | } | |
252b5132 | 2238 | |
45d6a902 | 2239 | s->_raw_size = size; |
268b6b39 | 2240 | s->contents = bfd_alloc (output_bfd, s->_raw_size); |
45d6a902 AM |
2241 | if (s->contents == NULL) |
2242 | return FALSE; | |
252b5132 | 2243 | |
45d6a902 AM |
2244 | p = s->contents; |
2245 | for (t = elf_tdata (output_bfd)->verref; | |
2246 | t != NULL; | |
2247 | t = t->vn_nextref) | |
2248 | { | |
2249 | unsigned int caux; | |
2250 | Elf_Internal_Vernaux *a; | |
2251 | bfd_size_type indx; | |
252b5132 | 2252 | |
45d6a902 AM |
2253 | caux = 0; |
2254 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
2255 | ++caux; | |
252b5132 | 2256 | |
45d6a902 AM |
2257 | t->vn_version = VER_NEED_CURRENT; |
2258 | t->vn_cnt = caux; | |
2259 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
2260 | elf_dt_name (t->vn_bfd) != NULL | |
2261 | ? elf_dt_name (t->vn_bfd) | |
2262 | : basename (t->vn_bfd->filename), | |
2263 | FALSE); | |
2264 | if (indx == (bfd_size_type) -1) | |
2265 | return FALSE; | |
2266 | t->vn_file = indx; | |
2267 | t->vn_aux = sizeof (Elf_External_Verneed); | |
2268 | if (t->vn_nextref == NULL) | |
2269 | t->vn_next = 0; | |
2270 | else | |
2271 | t->vn_next = (sizeof (Elf_External_Verneed) | |
2272 | + caux * sizeof (Elf_External_Vernaux)); | |
252b5132 | 2273 | |
45d6a902 AM |
2274 | _bfd_elf_swap_verneed_out (output_bfd, t, |
2275 | (Elf_External_Verneed *) p); | |
2276 | p += sizeof (Elf_External_Verneed); | |
252b5132 | 2277 | |
45d6a902 AM |
2278 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
2279 | { | |
2280 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
2281 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
2282 | a->vna_nodename, FALSE); | |
2283 | if (indx == (bfd_size_type) -1) | |
2284 | return FALSE; | |
2285 | a->vna_name = indx; | |
2286 | if (a->vna_nextptr == NULL) | |
2287 | a->vna_next = 0; | |
2288 | else | |
2289 | a->vna_next = sizeof (Elf_External_Vernaux); | |
252b5132 | 2290 | |
45d6a902 AM |
2291 | _bfd_elf_swap_vernaux_out (output_bfd, a, |
2292 | (Elf_External_Vernaux *) p); | |
2293 | p += sizeof (Elf_External_Vernaux); | |
2294 | } | |
2295 | } | |
252b5132 | 2296 | |
268b6b39 AM |
2297 | if (! elf_add_dynamic_entry (info, DT_VERNEED, 0) |
2298 | || ! elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
45d6a902 | 2299 | return FALSE; |
252b5132 | 2300 | |
45d6a902 AM |
2301 | elf_tdata (output_bfd)->cverrefs = crefs; |
2302 | } | |
2303 | } | |
252b5132 | 2304 | |
45d6a902 AM |
2305 | /* Assign dynsym indicies. In a shared library we generate a |
2306 | section symbol for each output section, which come first. | |
2307 | Next come all of the back-end allocated local dynamic syms, | |
2308 | followed by the rest of the global symbols. */ | |
e92d460e | 2309 | |
45d6a902 | 2310 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); |
bc2b6df7 | 2311 | |
45d6a902 AM |
2312 | /* Work out the size of the symbol version section. */ |
2313 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
2314 | BFD_ASSERT (s != NULL); | |
2315 | if (dynsymcount == 0 | |
2316 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
252b5132 | 2317 | { |
45d6a902 AM |
2318 | _bfd_strip_section_from_output (info, s); |
2319 | /* The DYNSYMCOUNT might have changed if we were going to | |
2320 | output a dynamic symbol table entry for S. */ | |
2321 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); | |
252b5132 | 2322 | } |
45d6a902 | 2323 | else |
c44233aa | 2324 | { |
45d6a902 | 2325 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); |
268b6b39 | 2326 | s->contents = bfd_zalloc (output_bfd, s->_raw_size); |
45d6a902 AM |
2327 | if (s->contents == NULL) |
2328 | return FALSE; | |
252b5132 | 2329 | |
268b6b39 | 2330 | if (! elf_add_dynamic_entry (info, DT_VERSYM, 0)) |
45d6a902 AM |
2331 | return FALSE; |
2332 | } | |
252b5132 | 2333 | |
45d6a902 AM |
2334 | /* Set the size of the .dynsym and .hash sections. We counted |
2335 | the number of dynamic symbols in elf_link_add_object_symbols. | |
2336 | We will build the contents of .dynsym and .hash when we build | |
2337 | the final symbol table, because until then we do not know the | |
2338 | correct value to give the symbols. We built the .dynstr | |
2339 | section as we went along in elf_link_add_object_symbols. */ | |
2340 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
2341 | BFD_ASSERT (s != NULL); | |
2342 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
268b6b39 | 2343 | s->contents = bfd_alloc (output_bfd, s->_raw_size); |
45d6a902 AM |
2344 | if (s->contents == NULL && s->_raw_size != 0) |
2345 | return FALSE; | |
252b5132 | 2346 | |
45d6a902 | 2347 | if (dynsymcount != 0) |
252b5132 | 2348 | { |
45d6a902 AM |
2349 | Elf_Internal_Sym isym; |
2350 | ||
2351 | /* The first entry in .dynsym is a dummy symbol. */ | |
2352 | isym.st_value = 0; | |
2353 | isym.st_size = 0; | |
2354 | isym.st_name = 0; | |
2355 | isym.st_info = 0; | |
2356 | isym.st_other = 0; | |
2357 | isym.st_shndx = 0; | |
268b6b39 | 2358 | elf_swap_symbol_out (output_bfd, &isym, s->contents, 0); |
252b5132 RH |
2359 | } |
2360 | ||
45d6a902 AM |
2361 | /* Compute the size of the hashing table. As a side effect this |
2362 | computes the hash values for all the names we export. */ | |
2363 | bucketcount = compute_bucket_count (info); | |
2364 | ||
2365 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
2366 | BFD_ASSERT (s != NULL); | |
2367 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
2368 | s->_raw_size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
268b6b39 | 2369 | s->contents = bfd_zalloc (output_bfd, s->_raw_size); |
45d6a902 AM |
2370 | if (s->contents == NULL) |
2371 | return FALSE; | |
252b5132 | 2372 | |
268b6b39 AM |
2373 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); |
2374 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
45d6a902 | 2375 | s->contents + hash_entry_size); |
252b5132 | 2376 | |
45d6a902 | 2377 | elf_hash_table (info)->bucketcount = bucketcount; |
252b5132 | 2378 | |
45d6a902 AM |
2379 | s = bfd_get_section_by_name (dynobj, ".dynstr"); |
2380 | BFD_ASSERT (s != NULL); | |
252b5132 | 2381 | |
45d6a902 | 2382 | elf_finalize_dynstr (output_bfd, info); |
252b5132 | 2383 | |
45d6a902 | 2384 | s->_raw_size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
252b5132 | 2385 | |
45d6a902 | 2386 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) |
268b6b39 | 2387 | if (! elf_add_dynamic_entry (info, DT_NULL, 0)) |
45d6a902 AM |
2388 | return FALSE; |
2389 | } | |
252b5132 | 2390 | |
b34976b6 | 2391 | return TRUE; |
252b5132 | 2392 | } |
45d6a902 AM |
2393 | \f |
2394 | /* This function is used to adjust offsets into .dynstr for | |
2395 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
252b5132 | 2396 | |
b34976b6 | 2397 | static bfd_boolean |
268b6b39 | 2398 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) |
252b5132 | 2399 | { |
268b6b39 | 2400 | struct elf_strtab_hash *dynstr = data; |
252b5132 | 2401 | |
e92d460e AM |
2402 | if (h->root.type == bfd_link_hash_warning) |
2403 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2404 | ||
45d6a902 AM |
2405 | if (h->dynindx != -1) |
2406 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
2407 | return TRUE; | |
2408 | } | |
252b5132 | 2409 | |
45d6a902 AM |
2410 | /* Assign string offsets in .dynstr, update all structures referencing |
2411 | them. */ | |
252b5132 | 2412 | |
45d6a902 | 2413 | static bfd_boolean |
268b6b39 | 2414 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) |
45d6a902 AM |
2415 | { |
2416 | struct elf_link_local_dynamic_entry *entry; | |
2417 | struct elf_strtab_hash *dynstr = elf_hash_table (info)->dynstr; | |
2418 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
2419 | asection *sdyn; | |
2420 | bfd_size_type size; | |
2421 | Elf_External_Dyn *dyncon, *dynconend; | |
252b5132 | 2422 | |
45d6a902 AM |
2423 | _bfd_elf_strtab_finalize (dynstr); |
2424 | size = _bfd_elf_strtab_size (dynstr); | |
252b5132 | 2425 | |
45d6a902 AM |
2426 | /* Update all .dynamic entries referencing .dynstr strings. */ |
2427 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2428 | BFD_ASSERT (sdyn != NULL); | |
252b5132 | 2429 | |
45d6a902 AM |
2430 | dyncon = (Elf_External_Dyn *) sdyn->contents; |
2431 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
2432 | sdyn->_raw_size); | |
2433 | for (; dyncon < dynconend; dyncon++) | |
2434 | { | |
2435 | Elf_Internal_Dyn dyn; | |
252b5132 | 2436 | |
45d6a902 AM |
2437 | elf_swap_dyn_in (dynobj, dyncon, & dyn); |
2438 | switch (dyn.d_tag) | |
252b5132 | 2439 | { |
45d6a902 AM |
2440 | case DT_STRSZ: |
2441 | dyn.d_un.d_val = size; | |
2442 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
2443 | break; | |
2444 | case DT_NEEDED: | |
2445 | case DT_SONAME: | |
2446 | case DT_RPATH: | |
2447 | case DT_RUNPATH: | |
2448 | case DT_FILTER: | |
2449 | case DT_AUXILIARY: | |
2450 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); | |
2451 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
2452 | break; | |
2453 | default: | |
2454 | break; | |
2455 | } | |
2456 | } | |
252b5132 | 2457 | |
45d6a902 AM |
2458 | /* Now update local dynamic symbols. */ |
2459 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
2460 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
2461 | entry->isym.st_name); | |
252b5132 | 2462 | |
45d6a902 AM |
2463 | /* And the rest of dynamic symbols. */ |
2464 | elf_link_hash_traverse (elf_hash_table (info), | |
2465 | elf_adjust_dynstr_offsets, dynstr); | |
252b5132 | 2466 | |
45d6a902 AM |
2467 | /* Adjust version definitions. */ |
2468 | if (elf_tdata (output_bfd)->cverdefs) | |
2469 | { | |
2470 | asection *s; | |
2471 | bfd_byte *p; | |
2472 | bfd_size_type i; | |
2473 | Elf_Internal_Verdef def; | |
2474 | Elf_Internal_Verdaux defaux; | |
252b5132 | 2475 | |
45d6a902 AM |
2476 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); |
2477 | p = (bfd_byte *) s->contents; | |
2478 | do | |
252b5132 | 2479 | { |
45d6a902 AM |
2480 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, |
2481 | &def); | |
2482 | p += sizeof (Elf_External_Verdef); | |
2483 | for (i = 0; i < def.vd_cnt; ++i) | |
252b5132 | 2484 | { |
45d6a902 AM |
2485 | _bfd_elf_swap_verdaux_in (output_bfd, |
2486 | (Elf_External_Verdaux *) p, &defaux); | |
2487 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
2488 | defaux.vda_name); | |
2489 | _bfd_elf_swap_verdaux_out (output_bfd, | |
2490 | &defaux, (Elf_External_Verdaux *) p); | |
2491 | p += sizeof (Elf_External_Verdaux); | |
252b5132 | 2492 | } |
252b5132 | 2493 | } |
45d6a902 | 2494 | while (def.vd_next); |
252b5132 RH |
2495 | } |
2496 | ||
45d6a902 AM |
2497 | /* Adjust version references. */ |
2498 | if (elf_tdata (output_bfd)->verref) | |
252b5132 | 2499 | { |
45d6a902 AM |
2500 | asection *s; |
2501 | bfd_byte *p; | |
2502 | bfd_size_type i; | |
2503 | Elf_Internal_Verneed need; | |
2504 | Elf_Internal_Vernaux needaux; | |
252b5132 | 2505 | |
45d6a902 AM |
2506 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); |
2507 | p = (bfd_byte *) s->contents; | |
2508 | do | |
252b5132 | 2509 | { |
45d6a902 AM |
2510 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, |
2511 | &need); | |
2512 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
2513 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
2514 | (Elf_External_Verneed *) p); | |
2515 | p += sizeof (Elf_External_Verneed); | |
2516 | for (i = 0; i < need.vn_cnt; ++i) | |
252b5132 | 2517 | { |
45d6a902 AM |
2518 | _bfd_elf_swap_vernaux_in (output_bfd, |
2519 | (Elf_External_Vernaux *) p, &needaux); | |
2520 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
2521 | needaux.vna_name); | |
2522 | _bfd_elf_swap_vernaux_out (output_bfd, | |
2523 | &needaux, | |
2524 | (Elf_External_Vernaux *) p); | |
2525 | p += sizeof (Elf_External_Vernaux); | |
252b5132 RH |
2526 | } |
2527 | } | |
45d6a902 | 2528 | while (need.vn_next); |
252b5132 RH |
2529 | } |
2530 | ||
b34976b6 | 2531 | return TRUE; |
252b5132 | 2532 | } |
252b5132 RH |
2533 | \f |
2534 | /* Final phase of ELF linker. */ | |
2535 | ||
2536 | /* A structure we use to avoid passing large numbers of arguments. */ | |
2537 | ||
2538 | struct elf_final_link_info | |
2539 | { | |
2540 | /* General link information. */ | |
2541 | struct bfd_link_info *info; | |
2542 | /* Output BFD. */ | |
2543 | bfd *output_bfd; | |
2544 | /* Symbol string table. */ | |
2545 | struct bfd_strtab_hash *symstrtab; | |
2546 | /* .dynsym section. */ | |
2547 | asection *dynsym_sec; | |
2548 | /* .hash section. */ | |
2549 | asection *hash_sec; | |
2550 | /* symbol version section (.gnu.version). */ | |
2551 | asection *symver_sec; | |
2552 | /* Buffer large enough to hold contents of any section. */ | |
2553 | bfd_byte *contents; | |
2554 | /* Buffer large enough to hold external relocs of any section. */ | |
268b6b39 | 2555 | void *external_relocs; |
252b5132 RH |
2556 | /* Buffer large enough to hold internal relocs of any section. */ |
2557 | Elf_Internal_Rela *internal_relocs; | |
2558 | /* Buffer large enough to hold external local symbols of any input | |
2559 | BFD. */ | |
2560 | Elf_External_Sym *external_syms; | |
9ad5cbcf AM |
2561 | /* And a buffer for symbol section indices. */ |
2562 | Elf_External_Sym_Shndx *locsym_shndx; | |
252b5132 RH |
2563 | /* Buffer large enough to hold internal local symbols of any input |
2564 | BFD. */ | |
2565 | Elf_Internal_Sym *internal_syms; | |
2566 | /* Array large enough to hold a symbol index for each local symbol | |
2567 | of any input BFD. */ | |
2568 | long *indices; | |
2569 | /* Array large enough to hold a section pointer for each local | |
2570 | symbol of any input BFD. */ | |
2571 | asection **sections; | |
2572 | /* Buffer to hold swapped out symbols. */ | |
2573 | Elf_External_Sym *symbuf; | |
9ad5cbcf AM |
2574 | /* And one for symbol section indices. */ |
2575 | Elf_External_Sym_Shndx *symshndxbuf; | |
252b5132 RH |
2576 | /* Number of swapped out symbols in buffer. */ |
2577 | size_t symbuf_count; | |
2578 | /* Number of symbols which fit in symbuf. */ | |
2579 | size_t symbuf_size; | |
c97e73dd AM |
2580 | /* And same for symshndxbuf. */ |
2581 | size_t shndxbuf_size; | |
252b5132 RH |
2582 | }; |
2583 | ||
b34976b6 | 2584 | static bfd_boolean elf_link_output_sym |
754021d0 AM |
2585 | (struct elf_final_link_info *, const char *, Elf_Internal_Sym *, asection *, |
2586 | struct elf_link_hash_entry *); | |
b34976b6 | 2587 | static bfd_boolean elf_link_flush_output_syms |
268b6b39 | 2588 | (struct elf_final_link_info *); |
b34976b6 | 2589 | static bfd_boolean elf_link_output_extsym |
268b6b39 | 2590 | (struct elf_link_hash_entry *, void *); |
b34976b6 | 2591 | static bfd_boolean elf_link_input_bfd |
268b6b39 | 2592 | (struct elf_final_link_info *, bfd *); |
b34976b6 | 2593 | static bfd_boolean elf_reloc_link_order |
268b6b39 | 2594 | (bfd *, struct bfd_link_info *, asection *, struct bfd_link_order *); |
252b5132 RH |
2595 | |
2596 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
2597 | ||
2598 | struct elf_outext_info | |
2599 | { | |
b34976b6 AM |
2600 | bfd_boolean failed; |
2601 | bfd_boolean localsyms; | |
252b5132 RH |
2602 | struct elf_final_link_info *finfo; |
2603 | }; | |
2604 | ||
1049f94e | 2605 | /* When performing a relocatable link, the input relocations are |
31367b81 MM |
2606 | preserved. But, if they reference global symbols, the indices |
2607 | referenced must be updated. Update all the relocations in | |
2608 | REL_HDR (there are COUNT of them), using the data in REL_HASH. */ | |
2609 | ||
2610 | static void | |
268b6b39 AM |
2611 | elf_link_adjust_relocs (bfd *abfd, |
2612 | Elf_Internal_Shdr *rel_hdr, | |
2613 | unsigned int count, | |
2614 | struct elf_link_hash_entry **rel_hash) | |
31367b81 MM |
2615 | { |
2616 | unsigned int i; | |
9c5bfbb7 | 2617 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
947216bf | 2618 | bfd_byte *erela; |
268b6b39 AM |
2619 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
2620 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
209f668e | 2621 | |
947216bf | 2622 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
209f668e | 2623 | { |
947216bf AM |
2624 | swap_in = bed->s->swap_reloc_in; |
2625 | swap_out = bed->s->swap_reloc_out; | |
209f668e | 2626 | } |
947216bf | 2627 | else if (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) |
209f668e | 2628 | { |
947216bf AM |
2629 | swap_in = bed->s->swap_reloca_in; |
2630 | swap_out = bed->s->swap_reloca_out; | |
209f668e | 2631 | } |
947216bf AM |
2632 | else |
2633 | abort (); | |
2634 | ||
2635 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
2636 | abort (); | |
31367b81 | 2637 | |
947216bf AM |
2638 | erela = rel_hdr->contents; |
2639 | for (i = 0; i < count; i++, rel_hash++, erela += rel_hdr->sh_entsize) | |
31367b81 | 2640 | { |
947216bf AM |
2641 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; |
2642 | unsigned int j; | |
2643 | ||
31367b81 MM |
2644 | if (*rel_hash == NULL) |
2645 | continue; | |
2646 | ||
2647 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
2648 | ||
947216bf AM |
2649 | (*swap_in) (abfd, erela, irela); |
2650 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
2651 | irela[j].r_info = ELF_R_INFO ((*rel_hash)->indx, | |
2652 | ELF_R_TYPE (irela[j].r_info)); | |
2653 | (*swap_out) (abfd, irela, erela); | |
31367b81 MM |
2654 | } |
2655 | } | |
2656 | ||
58821868 AM |
2657 | struct elf_link_sort_rela |
2658 | { | |
db6751f2 JJ |
2659 | bfd_vma offset; |
2660 | enum elf_reloc_type_class type; | |
947216bf AM |
2661 | /* We use this as an array of size int_rels_per_ext_rel. */ |
2662 | Elf_Internal_Rela rela[1]; | |
db6751f2 JJ |
2663 | }; |
2664 | ||
2665 | static int | |
268b6b39 | 2666 | elf_link_sort_cmp1 (const void *A, const void *B) |
db6751f2 | 2667 | { |
268b6b39 AM |
2668 | const struct elf_link_sort_rela *a = A; |
2669 | const struct elf_link_sort_rela *b = B; | |
db6751f2 JJ |
2670 | int relativea, relativeb; |
2671 | ||
2672 | relativea = a->type == reloc_class_relative; | |
2673 | relativeb = b->type == reloc_class_relative; | |
2674 | ||
2675 | if (relativea < relativeb) | |
db6751f2 | 2676 | return 1; |
fcfbdf31 JJ |
2677 | if (relativea > relativeb) |
2678 | return -1; | |
947216bf | 2679 | if (ELF_R_SYM (a->rela->r_info) < ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 2680 | return -1; |
947216bf | 2681 | if (ELF_R_SYM (a->rela->r_info) > ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 2682 | return 1; |
947216bf | 2683 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 2684 | return -1; |
947216bf | 2685 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
2686 | return 1; |
2687 | return 0; | |
2688 | } | |
2689 | ||
2690 | static int | |
268b6b39 | 2691 | elf_link_sort_cmp2 (const void *A, const void *B) |
db6751f2 | 2692 | { |
268b6b39 AM |
2693 | const struct elf_link_sort_rela *a = A; |
2694 | const struct elf_link_sort_rela *b = B; | |
db6751f2 JJ |
2695 | int copya, copyb; |
2696 | ||
2697 | if (a->offset < b->offset) | |
2698 | return -1; | |
2699 | if (a->offset > b->offset) | |
2700 | return 1; | |
290394d6 JJ |
2701 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); |
2702 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
db6751f2 JJ |
2703 | if (copya < copyb) |
2704 | return -1; | |
2705 | if (copya > copyb) | |
2706 | return 1; | |
947216bf | 2707 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 2708 | return -1; |
947216bf | 2709 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
2710 | return 1; |
2711 | return 0; | |
2712 | } | |
2713 | ||
2714 | static size_t | |
268b6b39 | 2715 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) |
db6751f2 | 2716 | { |
e717da7e | 2717 | asection *reldyn; |
f51e552e | 2718 | bfd_size_type count, size; |
947216bf AM |
2719 | size_t i, ret, sort_elt, ext_size; |
2720 | bfd_byte *sort, *s_non_relative, *p; | |
2721 | struct elf_link_sort_rela *sq; | |
9c5bfbb7 | 2722 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
033fd5f9 | 2723 | int i2e = bed->s->int_rels_per_ext_rel; |
268b6b39 AM |
2724 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
2725 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
e717da7e | 2726 | struct bfd_link_order *lo; |
db6751f2 JJ |
2727 | |
2728 | reldyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
2729 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
2730 | { | |
2731 | reldyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
2732 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
2733 | return 0; | |
947216bf AM |
2734 | ext_size = sizeof (Elf_External_Rel); |
2735 | swap_in = bed->s->swap_reloc_in; | |
2736 | swap_out = bed->s->swap_reloc_out; | |
db6751f2 JJ |
2737 | } |
2738 | else | |
947216bf AM |
2739 | { |
2740 | ext_size = sizeof (Elf_External_Rela); | |
2741 | swap_in = bed->s->swap_reloca_in; | |
2742 | swap_out = bed->s->swap_reloca_out; | |
2743 | } | |
2744 | count = reldyn->_raw_size / ext_size; | |
db6751f2 JJ |
2745 | |
2746 | size = 0; | |
e717da7e AM |
2747 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
2748 | if (lo->type == bfd_indirect_link_order) | |
2749 | { | |
2750 | asection *o = lo->u.indirect.section; | |
2751 | size += o->_raw_size; | |
2752 | } | |
db6751f2 JJ |
2753 | |
2754 | if (size != reldyn->_raw_size) | |
2755 | return 0; | |
2756 | ||
947216bf AM |
2757 | sort_elt = (sizeof (struct elf_link_sort_rela) |
2758 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
2759 | sort = bfd_zmalloc (sort_elt * count); | |
2760 | if (sort == NULL) | |
db6751f2 JJ |
2761 | { |
2762 | (*info->callbacks->warning) | |
268b6b39 | 2763 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); |
db6751f2 JJ |
2764 | return 0; |
2765 | } | |
2766 | ||
e717da7e AM |
2767 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
2768 | if (lo->type == bfd_indirect_link_order) | |
db6751f2 | 2769 | { |
947216bf | 2770 | bfd_byte *erel, *erelend; |
e717da7e | 2771 | asection *o = lo->u.indirect.section; |
db6751f2 | 2772 | |
947216bf AM |
2773 | erel = o->contents; |
2774 | erelend = o->contents + o->_raw_size; | |
2775 | p = sort + o->output_offset / ext_size * sort_elt; | |
2776 | while (erel < erelend) | |
db6751f2 | 2777 | { |
947216bf AM |
2778 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
2779 | (*swap_in) (abfd, erel, s->rela); | |
2780 | s->type = (*bed->elf_backend_reloc_type_class) (s->rela); | |
2781 | p += sort_elt; | |
2782 | erel += ext_size; | |
db6751f2 JJ |
2783 | } |
2784 | } | |
2785 | ||
268b6b39 | 2786 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); |
947216bf AM |
2787 | |
2788 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
db6751f2 | 2789 | { |
947216bf AM |
2790 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
2791 | if (s->type != reloc_class_relative) | |
2792 | break; | |
db6751f2 | 2793 | } |
947216bf AM |
2794 | ret = i; |
2795 | s_non_relative = p; | |
2796 | ||
2797 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
2798 | for (; i < count; i++, p += sort_elt) | |
2799 | { | |
2800 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
2801 | if (ELF_R_SYM (sp->rela->r_info) != ELF_R_SYM (sq->rela->r_info)) | |
2802 | sq = sp; | |
2803 | sp->offset = sq->rela->r_offset; | |
2804 | } | |
2805 | ||
268b6b39 | 2806 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); |
dc810e39 | 2807 | |
e717da7e AM |
2808 | for (lo = reldyn->link_order_head; lo != NULL; lo = lo->next) |
2809 | if (lo->type == bfd_indirect_link_order) | |
db6751f2 | 2810 | { |
947216bf | 2811 | bfd_byte *erel, *erelend; |
e717da7e | 2812 | asection *o = lo->u.indirect.section; |
db6751f2 | 2813 | |
947216bf AM |
2814 | erel = o->contents; |
2815 | erelend = o->contents + o->_raw_size; | |
2816 | p = sort + o->output_offset / ext_size * sort_elt; | |
2817 | while (erel < erelend) | |
db6751f2 | 2818 | { |
947216bf AM |
2819 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
2820 | (*swap_out) (abfd, s->rela, erel); | |
2821 | p += sort_elt; | |
2822 | erel += ext_size; | |
db6751f2 JJ |
2823 | } |
2824 | } | |
2825 | ||
5ed6aba4 | 2826 | free (sort); |
db6751f2 JJ |
2827 | *psec = reldyn; |
2828 | return ret; | |
2829 | } | |
2830 | ||
252b5132 RH |
2831 | /* Do the final step of an ELF link. */ |
2832 | ||
b34976b6 | 2833 | bfd_boolean |
268b6b39 | 2834 | elf_bfd_final_link (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 2835 | { |
b34976b6 AM |
2836 | bfd_boolean dynamic; |
2837 | bfd_boolean emit_relocs; | |
252b5132 RH |
2838 | bfd *dynobj; |
2839 | struct elf_final_link_info finfo; | |
2840 | register asection *o; | |
2841 | register struct bfd_link_order *p; | |
2842 | register bfd *sub; | |
dc810e39 AM |
2843 | bfd_size_type max_contents_size; |
2844 | bfd_size_type max_external_reloc_size; | |
2845 | bfd_size_type max_internal_reloc_count; | |
2846 | bfd_size_type max_sym_count; | |
9ad5cbcf | 2847 | bfd_size_type max_sym_shndx_count; |
252b5132 RH |
2848 | file_ptr off; |
2849 | Elf_Internal_Sym elfsym; | |
2850 | unsigned int i; | |
2851 | Elf_Internal_Shdr *symtab_hdr; | |
c97e73dd | 2852 | Elf_Internal_Shdr *symtab_shndx_hdr; |
252b5132 | 2853 | Elf_Internal_Shdr *symstrtab_hdr; |
9c5bfbb7 | 2854 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 | 2855 | struct elf_outext_info eoinfo; |
b34976b6 | 2856 | bfd_boolean merged; |
db6751f2 JJ |
2857 | size_t relativecount = 0; |
2858 | asection *reldyn = 0; | |
dc810e39 | 2859 | bfd_size_type amt; |
252b5132 | 2860 | |
0eddce27 | 2861 | if (! is_elf_hash_table (info->hash)) |
b34976b6 | 2862 | return FALSE; |
8ea2e4bd | 2863 | |
252b5132 RH |
2864 | if (info->shared) |
2865 | abfd->flags |= DYNAMIC; | |
2866 | ||
2867 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
2868 | dynobj = elf_hash_table (info)->dynobj; | |
2869 | ||
1049f94e | 2870 | emit_relocs = (info->relocatable |
c44233aa AM |
2871 | || info->emitrelocations |
2872 | || bed->elf_backend_emit_relocs); | |
9317eacc | 2873 | |
252b5132 RH |
2874 | finfo.info = info; |
2875 | finfo.output_bfd = abfd; | |
2876 | finfo.symstrtab = elf_stringtab_init (); | |
2877 | if (finfo.symstrtab == NULL) | |
b34976b6 | 2878 | return FALSE; |
252b5132 RH |
2879 | |
2880 | if (! dynamic) | |
2881 | { | |
2882 | finfo.dynsym_sec = NULL; | |
2883 | finfo.hash_sec = NULL; | |
2884 | finfo.symver_sec = NULL; | |
2885 | } | |
2886 | else | |
2887 | { | |
2888 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
2889 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
2890 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
2891 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
2892 | /* Note that it is OK if symver_sec is NULL. */ | |
2893 | } | |
2894 | ||
2895 | finfo.contents = NULL; | |
2896 | finfo.external_relocs = NULL; | |
2897 | finfo.internal_relocs = NULL; | |
2898 | finfo.external_syms = NULL; | |
9ad5cbcf | 2899 | finfo.locsym_shndx = NULL; |
252b5132 RH |
2900 | finfo.internal_syms = NULL; |
2901 | finfo.indices = NULL; | |
2902 | finfo.sections = NULL; | |
2903 | finfo.symbuf = NULL; | |
9ad5cbcf | 2904 | finfo.symshndxbuf = NULL; |
252b5132 | 2905 | finfo.symbuf_count = 0; |
c97e73dd | 2906 | finfo.shndxbuf_size = 0; |
252b5132 RH |
2907 | |
2908 | /* Count up the number of relocations we will output for each output | |
2909 | section, so that we know the sizes of the reloc sections. We | |
2910 | also figure out some maximum sizes. */ | |
2911 | max_contents_size = 0; | |
2912 | max_external_reloc_size = 0; | |
2913 | max_internal_reloc_count = 0; | |
2914 | max_sym_count = 0; | |
9ad5cbcf | 2915 | max_sym_shndx_count = 0; |
b34976b6 | 2916 | merged = FALSE; |
268b6b39 | 2917 | for (o = abfd->sections; o != NULL; o = o->next) |
252b5132 | 2918 | { |
3f9a32bd | 2919 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
252b5132 RH |
2920 | o->reloc_count = 0; |
2921 | ||
2922 | for (p = o->link_order_head; p != NULL; p = p->next) | |
2923 | { | |
3f9a32bd AM |
2924 | unsigned int reloc_count = 0; |
2925 | struct bfd_elf_section_data *esdi = NULL; | |
2926 | unsigned int *rel_count1; | |
2927 | ||
252b5132 RH |
2928 | if (p->type == bfd_section_reloc_link_order |
2929 | || p->type == bfd_symbol_reloc_link_order) | |
3f9a32bd | 2930 | reloc_count = 1; |
252b5132 RH |
2931 | else if (p->type == bfd_indirect_link_order) |
2932 | { | |
2933 | asection *sec; | |
2934 | ||
2935 | sec = p->u.indirect.section; | |
3f9a32bd | 2936 | esdi = elf_section_data (sec); |
252b5132 RH |
2937 | |
2938 | /* Mark all sections which are to be included in the | |
2939 | link. This will normally be every section. We need | |
2940 | to do this so that we can identify any sections which | |
2941 | the linker has decided to not include. */ | |
b34976b6 | 2942 | sec->linker_mark = TRUE; |
252b5132 | 2943 | |
f5fa8ca2 | 2944 | if (sec->flags & SEC_MERGE) |
b34976b6 | 2945 | merged = TRUE; |
f5fa8ca2 | 2946 | |
1049f94e | 2947 | if (info->relocatable || info->emitrelocations) |
3f9a32bd | 2948 | reloc_count = sec->reloc_count; |
c44233aa | 2949 | else if (bed->elf_backend_count_relocs) |
9317eacc CM |
2950 | { |
2951 | Elf_Internal_Rela * relocs; | |
2952 | ||
268b6b39 AM |
2953 | relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, |
2954 | info->keep_memory); | |
9317eacc | 2955 | |
3f9a32bd | 2956 | reloc_count = (*bed->elf_backend_count_relocs) (sec, relocs); |
9317eacc | 2957 | |
6cdc0ccc | 2958 | if (elf_section_data (o)->relocs != relocs) |
9317eacc CM |
2959 | free (relocs); |
2960 | } | |
252b5132 RH |
2961 | |
2962 | if (sec->_raw_size > max_contents_size) | |
2963 | max_contents_size = sec->_raw_size; | |
2964 | if (sec->_cooked_size > max_contents_size) | |
2965 | max_contents_size = sec->_cooked_size; | |
2966 | ||
2967 | /* We are interested in just local symbols, not all | |
2968 | symbols. */ | |
2969 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
2970 | && (sec->owner->flags & DYNAMIC) == 0) | |
2971 | { | |
2972 | size_t sym_count; | |
2973 | ||
2974 | if (elf_bad_symtab (sec->owner)) | |
2975 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
2976 | / sizeof (Elf_External_Sym)); | |
2977 | else | |
2978 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
2979 | ||
2980 | if (sym_count > max_sym_count) | |
2981 | max_sym_count = sym_count; | |
2982 | ||
9ad5cbcf AM |
2983 | if (sym_count > max_sym_shndx_count |
2984 | && elf_symtab_shndx (sec->owner) != 0) | |
2985 | max_sym_shndx_count = sym_count; | |
2986 | ||
252b5132 RH |
2987 | if ((sec->flags & SEC_RELOC) != 0) |
2988 | { | |
2989 | size_t ext_size; | |
2990 | ||
2991 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
2992 | if (ext_size > max_external_reloc_size) | |
2993 | max_external_reloc_size = ext_size; | |
2994 | if (sec->reloc_count > max_internal_reloc_count) | |
2995 | max_internal_reloc_count = sec->reloc_count; | |
2996 | } | |
2997 | } | |
2998 | } | |
3f9a32bd AM |
2999 | |
3000 | if (reloc_count == 0) | |
3001 | continue; | |
3002 | ||
3003 | o->reloc_count += reloc_count; | |
3004 | ||
3005 | /* MIPS may have a mix of REL and RELA relocs on sections. | |
3006 | To support this curious ABI we keep reloc counts in | |
3007 | elf_section_data too. We must be careful to add the | |
3008 | relocations from the input section to the right output | |
3009 | count. FIXME: Get rid of one count. We have | |
3010 | o->reloc_count == esdo->rel_count + esdo->rel_count2. */ | |
3011 | rel_count1 = &esdo->rel_count; | |
3012 | if (esdi != NULL) | |
3013 | { | |
3014 | bfd_boolean same_size; | |
3015 | bfd_size_type entsize1; | |
3016 | ||
3017 | entsize1 = esdi->rel_hdr.sh_entsize; | |
3018 | BFD_ASSERT (entsize1 == sizeof (Elf_External_Rel) | |
3019 | || entsize1 == sizeof (Elf_External_Rela)); | |
3020 | same_size = (!o->use_rela_p | |
3021 | == (entsize1 == sizeof (Elf_External_Rel))); | |
3022 | ||
3023 | if (!same_size) | |
3024 | rel_count1 = &esdo->rel_count2; | |
3025 | ||
3026 | if (esdi->rel_hdr2 != NULL) | |
3027 | { | |
3028 | bfd_size_type entsize2 = esdi->rel_hdr2->sh_entsize; | |
3029 | unsigned int alt_count; | |
3030 | unsigned int *rel_count2; | |
3031 | ||
3032 | BFD_ASSERT (entsize2 != entsize1 | |
3033 | && (entsize2 == sizeof (Elf_External_Rel) | |
3034 | || entsize2 == sizeof (Elf_External_Rela))); | |
3035 | ||
3036 | rel_count2 = &esdo->rel_count2; | |
3037 | if (!same_size) | |
3038 | rel_count2 = &esdo->rel_count; | |
3039 | ||
3040 | /* The following is probably too simplistic if the | |
3041 | backend counts output relocs unusually. */ | |
3042 | BFD_ASSERT (bed->elf_backend_count_relocs == NULL); | |
3043 | alt_count = NUM_SHDR_ENTRIES (esdi->rel_hdr2); | |
3044 | *rel_count2 += alt_count; | |
3045 | reloc_count -= alt_count; | |
3046 | } | |
3047 | } | |
3048 | *rel_count1 += reloc_count; | |
252b5132 RH |
3049 | } |
3050 | ||
3051 | if (o->reloc_count > 0) | |
3052 | o->flags |= SEC_RELOC; | |
3053 | else | |
3054 | { | |
3055 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
3056 | set it (this is probably a bug) and if it is set | |
3057 | assign_section_numbers will create a reloc section. */ | |
3058 | o->flags &=~ SEC_RELOC; | |
3059 | } | |
3060 | ||
3061 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
3062 | zero. This is done in elf_fake_sections as well, but forcing | |
3063 | the VMA to 0 here will ensure that relocs against these | |
3064 | sections are handled correctly. */ | |
3065 | if ((o->flags & SEC_ALLOC) == 0 | |
3066 | && ! o->user_set_vma) | |
3067 | o->vma = 0; | |
3068 | } | |
3069 | ||
1049f94e | 3070 | if (! info->relocatable && merged) |
f5fa8ca2 | 3071 | elf_link_hash_traverse (elf_hash_table (info), |
268b6b39 | 3072 | _bfd_elf_link_sec_merge_syms, abfd); |
f5fa8ca2 | 3073 | |
252b5132 RH |
3074 | /* Figure out the file positions for everything but the symbol table |
3075 | and the relocs. We set symcount to force assign_section_numbers | |
3076 | to create a symbol table. */ | |
3077 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
3078 | BFD_ASSERT (! abfd->output_has_begun); | |
3079 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
3080 | goto error_return; | |
3081 | ||
3082 | /* That created the reloc sections. Set their sizes, and assign | |
3083 | them file positions, and allocate some buffers. */ | |
3084 | for (o = abfd->sections; o != NULL; o = o->next) | |
3085 | { | |
3086 | if ((o->flags & SEC_RELOC) != 0) | |
3087 | { | |
45d6a902 AM |
3088 | if (!(_bfd_elf_link_size_reloc_section |
3089 | (abfd, &elf_section_data (o)->rel_hdr, o))) | |
252b5132 RH |
3090 | goto error_return; |
3091 | ||
23bc299b | 3092 | if (elf_section_data (o)->rel_hdr2 |
45d6a902 AM |
3093 | && !(_bfd_elf_link_size_reloc_section |
3094 | (abfd, elf_section_data (o)->rel_hdr2, o))) | |
252b5132 | 3095 | goto error_return; |
252b5132 | 3096 | } |
b037af20 MM |
3097 | |
3098 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
3e932841 | 3099 | to count upwards while actually outputting the relocations. */ |
b037af20 MM |
3100 | elf_section_data (o)->rel_count = 0; |
3101 | elf_section_data (o)->rel_count2 = 0; | |
252b5132 RH |
3102 | } |
3103 | ||
3104 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
3105 | ||
3106 | /* We have now assigned file positions for all the sections except | |
3107 | .symtab and .strtab. We start the .symtab section at the current | |
3108 | file position, and write directly to it. We build the .strtab | |
3109 | section in memory. */ | |
3110 | bfd_get_symcount (abfd) = 0; | |
3111 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3112 | /* sh_name is set in prep_headers. */ | |
3113 | symtab_hdr->sh_type = SHT_SYMTAB; | |
c97e73dd | 3114 | /* sh_flags, sh_addr and sh_size all start off zero. */ |
252b5132 RH |
3115 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
3116 | /* sh_link is set in assign_section_numbers. */ | |
3117 | /* sh_info is set below. */ | |
3118 | /* sh_offset is set just below. */ | |
45d6a902 | 3119 | symtab_hdr->sh_addralign = 1 << bed->s->log_file_align; |
252b5132 RH |
3120 | |
3121 | off = elf_tdata (abfd)->next_file_pos; | |
b34976b6 | 3122 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); |
252b5132 RH |
3123 | |
3124 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
3125 | incorrect. We do not yet know the size of the .symtab section. | |
3126 | We correct next_file_pos below, after we do know the size. */ | |
3127 | ||
3128 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
3129 | continuously seeking to the right position in the file. */ | |
3130 | if (! info->keep_memory || max_sym_count < 20) | |
3131 | finfo.symbuf_size = 20; | |
3132 | else | |
3133 | finfo.symbuf_size = max_sym_count; | |
dc810e39 AM |
3134 | amt = finfo.symbuf_size; |
3135 | amt *= sizeof (Elf_External_Sym); | |
268b6b39 | 3136 | finfo.symbuf = bfd_malloc (amt); |
252b5132 RH |
3137 | if (finfo.symbuf == NULL) |
3138 | goto error_return; | |
9ad5cbcf AM |
3139 | if (elf_numsections (abfd) > SHN_LORESERVE) |
3140 | { | |
c97e73dd AM |
3141 | /* Wild guess at number of output symbols. realloc'd as needed. */ |
3142 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
3143 | finfo.shndxbuf_size = amt; | |
9ad5cbcf | 3144 | amt *= sizeof (Elf_External_Sym_Shndx); |
268b6b39 | 3145 | finfo.symshndxbuf = bfd_zmalloc (amt); |
9ad5cbcf AM |
3146 | if (finfo.symshndxbuf == NULL) |
3147 | goto error_return; | |
3148 | } | |
252b5132 RH |
3149 | |
3150 | /* Start writing out the symbol table. The first symbol is always a | |
3151 | dummy symbol. */ | |
9317eacc CM |
3152 | if (info->strip != strip_all |
3153 | || emit_relocs) | |
252b5132 RH |
3154 | { |
3155 | elfsym.st_value = 0; | |
3156 | elfsym.st_size = 0; | |
3157 | elfsym.st_info = 0; | |
3158 | elfsym.st_other = 0; | |
3159 | elfsym.st_shndx = SHN_UNDEF; | |
754021d0 AM |
3160 | if (! elf_link_output_sym (&finfo, NULL, &elfsym, bfd_und_section_ptr, |
3161 | NULL)) | |
252b5132 RH |
3162 | goto error_return; |
3163 | } | |
3164 | ||
3165 | #if 0 | |
3166 | /* Some standard ELF linkers do this, but we don't because it causes | |
3167 | bootstrap comparison failures. */ | |
3168 | /* Output a file symbol for the output file as the second symbol. | |
3169 | We output this even if we are discarding local symbols, although | |
3170 | I'm not sure if this is correct. */ | |
3171 | elfsym.st_value = 0; | |
3172 | elfsym.st_size = 0; | |
3173 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
3174 | elfsym.st_other = 0; | |
3175 | elfsym.st_shndx = SHN_ABS; | |
3176 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
754021d0 | 3177 | &elfsym, bfd_abs_section_ptr, NULL)) |
252b5132 RH |
3178 | goto error_return; |
3179 | #endif | |
3180 | ||
3181 | /* Output a symbol for each section. We output these even if we are | |
3182 | discarding local symbols, since they are used for relocs. These | |
3183 | symbols have no names. We store the index of each one in the | |
3184 | index field of the section, so that we can find it again when | |
3185 | outputting relocs. */ | |
9317eacc CM |
3186 | if (info->strip != strip_all |
3187 | || emit_relocs) | |
252b5132 RH |
3188 | { |
3189 | elfsym.st_size = 0; | |
3190 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
3191 | elfsym.st_other = 0; | |
9ad5cbcf | 3192 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
3193 | { |
3194 | o = section_from_elf_index (abfd, i); | |
3195 | if (o != NULL) | |
3196 | o->target_index = bfd_get_symcount (abfd); | |
3197 | elfsym.st_shndx = i; | |
1049f94e | 3198 | if (info->relocatable || o == NULL) |
252b5132 RH |
3199 | elfsym.st_value = 0; |
3200 | else | |
3201 | elfsym.st_value = o->vma; | |
754021d0 | 3202 | if (! elf_link_output_sym (&finfo, NULL, &elfsym, o, NULL)) |
252b5132 | 3203 | goto error_return; |
c97e73dd | 3204 | if (i == SHN_LORESERVE - 1) |
9ad5cbcf | 3205 | i += SHN_HIRESERVE + 1 - SHN_LORESERVE; |
252b5132 RH |
3206 | } |
3207 | } | |
3208 | ||
3209 | /* Allocate some memory to hold information read in from the input | |
3210 | files. */ | |
9ad5cbcf AM |
3211 | if (max_contents_size != 0) |
3212 | { | |
268b6b39 | 3213 | finfo.contents = bfd_malloc (max_contents_size); |
9ad5cbcf AM |
3214 | if (finfo.contents == NULL) |
3215 | goto error_return; | |
3216 | } | |
3217 | ||
3218 | if (max_external_reloc_size != 0) | |
3219 | { | |
268b6b39 | 3220 | finfo.external_relocs = bfd_malloc (max_external_reloc_size); |
9ad5cbcf AM |
3221 | if (finfo.external_relocs == NULL) |
3222 | goto error_return; | |
3223 | } | |
3224 | ||
3225 | if (max_internal_reloc_count != 0) | |
3226 | { | |
3227 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
3228 | amt *= sizeof (Elf_Internal_Rela); | |
268b6b39 | 3229 | finfo.internal_relocs = bfd_malloc (amt); |
9ad5cbcf AM |
3230 | if (finfo.internal_relocs == NULL) |
3231 | goto error_return; | |
3232 | } | |
3233 | ||
3234 | if (max_sym_count != 0) | |
3235 | { | |
3236 | amt = max_sym_count * sizeof (Elf_External_Sym); | |
268b6b39 | 3237 | finfo.external_syms = bfd_malloc (amt); |
9ad5cbcf AM |
3238 | if (finfo.external_syms == NULL) |
3239 | goto error_return; | |
3240 | ||
3241 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
268b6b39 | 3242 | finfo.internal_syms = bfd_malloc (amt); |
9ad5cbcf AM |
3243 | if (finfo.internal_syms == NULL) |
3244 | goto error_return; | |
3245 | ||
3246 | amt = max_sym_count * sizeof (long); | |
268b6b39 | 3247 | finfo.indices = bfd_malloc (amt); |
9ad5cbcf AM |
3248 | if (finfo.indices == NULL) |
3249 | goto error_return; | |
3250 | ||
3251 | amt = max_sym_count * sizeof (asection *); | |
268b6b39 | 3252 | finfo.sections = bfd_malloc (amt); |
9ad5cbcf AM |
3253 | if (finfo.sections == NULL) |
3254 | goto error_return; | |
3255 | } | |
3256 | ||
3257 | if (max_sym_shndx_count != 0) | |
3258 | { | |
3259 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
268b6b39 | 3260 | finfo.locsym_shndx = bfd_malloc (amt); |
9ad5cbcf AM |
3261 | if (finfo.locsym_shndx == NULL) |
3262 | goto error_return; | |
3263 | } | |
252b5132 | 3264 | |
e1918d23 | 3265 | if (elf_hash_table (info)->tls_sec) |
13ae64f3 | 3266 | { |
e1918d23 | 3267 | bfd_vma base, end = 0; |
13ae64f3 JJ |
3268 | asection *sec; |
3269 | ||
e1918d23 | 3270 | for (sec = elf_hash_table (info)->tls_sec; |
13ae64f3 JJ |
3271 | sec && (sec->flags & SEC_THREAD_LOCAL); |
3272 | sec = sec->next) | |
3273 | { | |
3274 | bfd_vma size = sec->_raw_size; | |
3275 | ||
e1918d23 | 3276 | if (size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0) |
13ae64f3 JJ |
3277 | { |
3278 | struct bfd_link_order *o; | |
3279 | ||
13ae64f3 JJ |
3280 | for (o = sec->link_order_head; o != NULL; o = o->next) |
3281 | if (size < o->offset + o->size) | |
58821868 | 3282 | size = o->offset + o->size; |
13ae64f3 JJ |
3283 | } |
3284 | end = sec->vma + size; | |
3285 | } | |
e1918d23 AM |
3286 | base = elf_hash_table (info)->tls_sec->vma; |
3287 | end = align_power (end, elf_hash_table (info)->tls_sec->alignment_power); | |
3288 | elf_hash_table (info)->tls_size = end - base; | |
13ae64f3 JJ |
3289 | } |
3290 | ||
252b5132 RH |
3291 | /* Since ELF permits relocations to be against local symbols, we |
3292 | must have the local symbols available when we do the relocations. | |
3293 | Since we would rather only read the local symbols once, and we | |
3294 | would rather not keep them in memory, we handle all the | |
3295 | relocations for a single input file at the same time. | |
3296 | ||
3297 | Unfortunately, there is no way to know the total number of local | |
3298 | symbols until we have seen all of them, and the local symbol | |
3299 | indices precede the global symbol indices. This means that when | |
1049f94e | 3300 | we are generating relocatable output, and we see a reloc against |
252b5132 RH |
3301 | a global symbol, we can not know the symbol index until we have |
3302 | finished examining all the local symbols to see which ones we are | |
3303 | going to output. To deal with this, we keep the relocations in | |
3304 | memory, and don't output them until the end of the link. This is | |
3305 | an unfortunate waste of memory, but I don't see a good way around | |
1049f94e | 3306 | it. Fortunately, it only happens when performing a relocatable |
252b5132 RH |
3307 | link, which is not the common case. FIXME: If keep_memory is set |
3308 | we could write the relocs out and then read them again; I don't | |
3309 | know how bad the memory loss will be. */ | |
3310 | ||
3311 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
b34976b6 | 3312 | sub->output_has_begun = FALSE; |
252b5132 RH |
3313 | for (o = abfd->sections; o != NULL; o = o->next) |
3314 | { | |
3315 | for (p = o->link_order_head; p != NULL; p = p->next) | |
3316 | { | |
3317 | if (p->type == bfd_indirect_link_order | |
a50c1845 | 3318 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) |
4ddafab0 | 3319 | == bfd_target_elf_flavour) |
a50c1845 | 3320 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) |
252b5132 | 3321 | { |
252b5132 RH |
3322 | if (! sub->output_has_begun) |
3323 | { | |
3324 | if (! elf_link_input_bfd (&finfo, sub)) | |
3325 | goto error_return; | |
b34976b6 | 3326 | sub->output_has_begun = TRUE; |
252b5132 RH |
3327 | } |
3328 | } | |
3329 | else if (p->type == bfd_section_reloc_link_order | |
3330 | || p->type == bfd_symbol_reloc_link_order) | |
3331 | { | |
3332 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
3333 | goto error_return; | |
3334 | } | |
3335 | else | |
3336 | { | |
3337 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
3338 | goto error_return; | |
3339 | } | |
3340 | } | |
3341 | } | |
3342 | ||
c44233aa AM |
3343 | /* Output any global symbols that got converted to local in a |
3344 | version script or due to symbol visibility. We do this in a | |
3345 | separate step since ELF requires all local symbols to appear | |
3346 | prior to any global symbols. FIXME: We should only do this if | |
3347 | some global symbols were, in fact, converted to become local. | |
3348 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
b34976b6 | 3349 | eoinfo.failed = FALSE; |
c44233aa | 3350 | eoinfo.finfo = &finfo; |
b34976b6 | 3351 | eoinfo.localsyms = TRUE; |
c44233aa | 3352 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
268b6b39 | 3353 | &eoinfo); |
c44233aa | 3354 | if (eoinfo.failed) |
b34976b6 | 3355 | return FALSE; |
c44233aa | 3356 | |
252b5132 | 3357 | /* That wrote out all the local symbols. Finish up the symbol table |
5cc7c785 L |
3358 | with the global symbols. Even if we want to strip everything we |
3359 | can, we still need to deal with those global symbols that got | |
3e932841 | 3360 | converted to local in a version script. */ |
252b5132 | 3361 | |
30b30c21 | 3362 | /* The sh_info field records the index of the first non local symbol. */ |
252b5132 | 3363 | symtab_hdr->sh_info = bfd_get_symcount (abfd); |
30b30c21 | 3364 | |
fc8c40a0 AM |
3365 | if (dynamic |
3366 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
30b30c21 RH |
3367 | { |
3368 | Elf_Internal_Sym sym; | |
3369 | Elf_External_Sym *dynsym = | |
a7b97311 | 3370 | (Elf_External_Sym *) finfo.dynsym_sec->contents; |
71a40b32 | 3371 | long last_local = 0; |
30b30c21 RH |
3372 | |
3373 | /* Write out the section symbols for the output sections. */ | |
3374 | if (info->shared) | |
3375 | { | |
3376 | asection *s; | |
3377 | ||
3378 | sym.st_size = 0; | |
3379 | sym.st_name = 0; | |
3380 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
3381 | sym.st_other = 0; | |
3382 | ||
3383 | for (s = abfd->sections; s != NULL; s = s->next) | |
3384 | { | |
3385 | int indx; | |
9ad5cbcf AM |
3386 | Elf_External_Sym *dest; |
3387 | ||
30b30c21 RH |
3388 | indx = elf_section_data (s)->this_idx; |
3389 | BFD_ASSERT (indx > 0); | |
3390 | sym.st_shndx = indx; | |
3391 | sym.st_value = s->vma; | |
9ad5cbcf | 3392 | dest = dynsym + elf_section_data (s)->dynindx; |
268b6b39 | 3393 | elf_swap_symbol_out (abfd, &sym, dest, 0); |
30b30c21 RH |
3394 | } |
3395 | ||
3396 | last_local = bfd_count_sections (abfd); | |
3397 | } | |
3398 | ||
3399 | /* Write out the local dynsyms. */ | |
3400 | if (elf_hash_table (info)->dynlocal) | |
3401 | { | |
3402 | struct elf_link_local_dynamic_entry *e; | |
3403 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
3404 | { | |
318da145 | 3405 | asection *s; |
9ad5cbcf | 3406 | Elf_External_Sym *dest; |
30b30c21 | 3407 | |
b037af20 MM |
3408 | sym.st_size = e->isym.st_size; |
3409 | sym.st_other = e->isym.st_other; | |
3410 | ||
1fa0ddb3 RH |
3411 | /* Copy the internal symbol as is. |
3412 | Note that we saved a word of storage and overwrote | |
c44233aa AM |
3413 | the original st_name with the dynstr_index. */ |
3414 | sym = e->isym; | |
30b30c21 | 3415 | |
c8e5ddc8 | 3416 | if (e->isym.st_shndx != SHN_UNDEF |
58821868 AM |
3417 | && (e->isym.st_shndx < SHN_LORESERVE |
3418 | || e->isym.st_shndx > SHN_HIRESERVE)) | |
587ff49e RH |
3419 | { |
3420 | s = bfd_section_from_elf_index (e->input_bfd, | |
3421 | e->isym.st_shndx); | |
3422 | ||
3423 | sym.st_shndx = | |
3424 | elf_section_data (s->output_section)->this_idx; | |
3425 | sym.st_value = (s->output_section->vma | |
3426 | + s->output_offset | |
3427 | + e->isym.st_value); | |
3428 | } | |
30b30c21 RH |
3429 | |
3430 | if (last_local < e->dynindx) | |
3431 | last_local = e->dynindx; | |
3432 | ||
9ad5cbcf | 3433 | dest = dynsym + e->dynindx; |
268b6b39 | 3434 | elf_swap_symbol_out (abfd, &sym, dest, 0); |
30b30c21 RH |
3435 | } |
3436 | } | |
3437 | ||
71a40b32 ILT |
3438 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = |
3439 | last_local + 1; | |
30b30c21 | 3440 | } |
252b5132 RH |
3441 | |
3442 | /* We get the global symbols from the hash table. */ | |
b34976b6 AM |
3443 | eoinfo.failed = FALSE; |
3444 | eoinfo.localsyms = FALSE; | |
252b5132 RH |
3445 | eoinfo.finfo = &finfo; |
3446 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
268b6b39 | 3447 | &eoinfo); |
252b5132 | 3448 | if (eoinfo.failed) |
b34976b6 | 3449 | return FALSE; |
252b5132 | 3450 | |
587ff49e RH |
3451 | /* If backend needs to output some symbols not present in the hash |
3452 | table, do it now. */ | |
3453 | if (bed->elf_backend_output_arch_syms) | |
3454 | { | |
b34976b6 | 3455 | typedef bfd_boolean (*out_sym_func) |
754021d0 AM |
3456 | (void *, const char *, Elf_Internal_Sym *, asection *, |
3457 | struct elf_link_hash_entry *); | |
dc810e39 AM |
3458 | |
3459 | if (! ((*bed->elf_backend_output_arch_syms) | |
268b6b39 | 3460 | (abfd, info, &finfo, (out_sym_func) elf_link_output_sym))) |
b34976b6 | 3461 | return FALSE; |
3e932841 | 3462 | } |
587ff49e | 3463 | |
252b5132 RH |
3464 | /* Flush all symbols to the file. */ |
3465 | if (! elf_link_flush_output_syms (&finfo)) | |
b34976b6 | 3466 | return FALSE; |
252b5132 RH |
3467 | |
3468 | /* Now we know the size of the symtab section. */ | |
3469 | off += symtab_hdr->sh_size; | |
3470 | ||
c97e73dd AM |
3471 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
3472 | if (symtab_shndx_hdr->sh_name != 0) | |
3473 | { | |
3474 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
3475 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
3476 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
3477 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
3478 | symtab_shndx_hdr->sh_size = amt; | |
3479 | ||
3480 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
b34976b6 | 3481 | off, TRUE); |
c97e73dd AM |
3482 | |
3483 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
268b6b39 | 3484 | || (bfd_bwrite (finfo.symshndxbuf, amt, abfd) != amt)) |
b34976b6 | 3485 | return FALSE; |
c97e73dd AM |
3486 | } |
3487 | ||
3488 | ||
252b5132 RH |
3489 | /* Finish up and write out the symbol string table (.strtab) |
3490 | section. */ | |
3491 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
3492 | /* sh_name was set in prep_headers. */ | |
3493 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
3494 | symstrtab_hdr->sh_flags = 0; | |
3495 | symstrtab_hdr->sh_addr = 0; | |
3496 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
3497 | symstrtab_hdr->sh_entsize = 0; | |
3498 | symstrtab_hdr->sh_link = 0; | |
3499 | symstrtab_hdr->sh_info = 0; | |
3500 | /* sh_offset is set just below. */ | |
3501 | symstrtab_hdr->sh_addralign = 1; | |
3502 | ||
b34976b6 | 3503 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); |
252b5132 RH |
3504 | elf_tdata (abfd)->next_file_pos = off; |
3505 | ||
3506 | if (bfd_get_symcount (abfd) > 0) | |
3507 | { | |
3508 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
3509 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
b34976b6 | 3510 | return FALSE; |
252b5132 RH |
3511 | } |
3512 | ||
3513 | /* Adjust the relocs to have the correct symbol indices. */ | |
3514 | for (o = abfd->sections; o != NULL; o = o->next) | |
3515 | { | |
252b5132 RH |
3516 | if ((o->flags & SEC_RELOC) == 0) |
3517 | continue; | |
3518 | ||
3e932841 | 3519 | elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr, |
31367b81 MM |
3520 | elf_section_data (o)->rel_count, |
3521 | elf_section_data (o)->rel_hashes); | |
3522 | if (elf_section_data (o)->rel_hdr2 != NULL) | |
3523 | elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2, | |
3524 | elf_section_data (o)->rel_count2, | |
3e932841 | 3525 | (elf_section_data (o)->rel_hashes |
31367b81 | 3526 | + elf_section_data (o)->rel_count)); |
252b5132 RH |
3527 | |
3528 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
3529 | trying to swap the relocs out itself. */ | |
3530 | o->reloc_count = 0; | |
3531 | } | |
3532 | ||
db6751f2 JJ |
3533 | if (dynamic && info->combreloc && dynobj != NULL) |
3534 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
3535 | ||
252b5132 RH |
3536 | /* If we are linking against a dynamic object, or generating a |
3537 | shared library, finish up the dynamic linking information. */ | |
3538 | if (dynamic) | |
3539 | { | |
3540 | Elf_External_Dyn *dyncon, *dynconend; | |
3541 | ||
3542 | /* Fix up .dynamic entries. */ | |
3543 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3544 | BFD_ASSERT (o != NULL); | |
3545 | ||
3546 | dyncon = (Elf_External_Dyn *) o->contents; | |
3547 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
3548 | for (; dyncon < dynconend; dyncon++) | |
3549 | { | |
3550 | Elf_Internal_Dyn dyn; | |
3551 | const char *name; | |
3552 | unsigned int type; | |
3553 | ||
3554 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
3555 | ||
3556 | switch (dyn.d_tag) | |
3557 | { | |
3558 | default: | |
3559 | break; | |
db6751f2 JJ |
3560 | case DT_NULL: |
3561 | if (relativecount > 0 && dyncon + 1 < dynconend) | |
3562 | { | |
3563 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
3564 | { | |
3565 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
3566 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
3567 | default: break; | |
3568 | } | |
3569 | if (dyn.d_tag != DT_NULL) | |
3570 | { | |
3571 | dyn.d_un.d_val = relativecount; | |
3572 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3573 | relativecount = 0; | |
3574 | } | |
3575 | } | |
3576 | break; | |
252b5132 | 3577 | case DT_INIT: |
f0c2e336 | 3578 | name = info->init_function; |
252b5132 RH |
3579 | goto get_sym; |
3580 | case DT_FINI: | |
f0c2e336 | 3581 | name = info->fini_function; |
252b5132 RH |
3582 | get_sym: |
3583 | { | |
3584 | struct elf_link_hash_entry *h; | |
3585 | ||
3586 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 3587 | FALSE, FALSE, TRUE); |
252b5132 RH |
3588 | if (h != NULL |
3589 | && (h->root.type == bfd_link_hash_defined | |
3590 | || h->root.type == bfd_link_hash_defweak)) | |
3591 | { | |
3592 | dyn.d_un.d_val = h->root.u.def.value; | |
3593 | o = h->root.u.def.section; | |
3594 | if (o->output_section != NULL) | |
3595 | dyn.d_un.d_val += (o->output_section->vma | |
3596 | + o->output_offset); | |
3597 | else | |
3598 | { | |
3599 | /* The symbol is imported from another shared | |
3600 | library and does not apply to this one. */ | |
3601 | dyn.d_un.d_val = 0; | |
3602 | } | |
3603 | ||
3604 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3605 | } | |
3606 | } | |
3607 | break; | |
3608 | ||
30831527 RH |
3609 | case DT_PREINIT_ARRAYSZ: |
3610 | name = ".preinit_array"; | |
3611 | goto get_size; | |
3612 | case DT_INIT_ARRAYSZ: | |
3613 | name = ".init_array"; | |
3614 | goto get_size; | |
3615 | case DT_FINI_ARRAYSZ: | |
3616 | name = ".fini_array"; | |
3617 | get_size: | |
3618 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
3619 | if (o == NULL) |
3620 | { | |
3621 | (*_bfd_error_handler) | |
3622 | (_("%s: could not find output section %s"), | |
3623 | bfd_get_filename (abfd), name); | |
3624 | goto error_return; | |
3625 | } | |
25e27870 L |
3626 | if (o->_raw_size == 0) |
3627 | (*_bfd_error_handler) | |
3628 | (_("warning: %s section has zero size"), name); | |
30831527 RH |
3629 | dyn.d_un.d_val = o->_raw_size; |
3630 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3631 | break; | |
3632 | ||
3633 | case DT_PREINIT_ARRAY: | |
3634 | name = ".preinit_array"; | |
3635 | goto get_vma; | |
3636 | case DT_INIT_ARRAY: | |
3637 | name = ".init_array"; | |
3638 | goto get_vma; | |
3639 | case DT_FINI_ARRAY: | |
3640 | name = ".fini_array"; | |
3641 | goto get_vma; | |
3642 | ||
252b5132 RH |
3643 | case DT_HASH: |
3644 | name = ".hash"; | |
3645 | goto get_vma; | |
3646 | case DT_STRTAB: | |
3647 | name = ".dynstr"; | |
3648 | goto get_vma; | |
3649 | case DT_SYMTAB: | |
3650 | name = ".dynsym"; | |
3651 | goto get_vma; | |
3652 | case DT_VERDEF: | |
3653 | name = ".gnu.version_d"; | |
3654 | goto get_vma; | |
3655 | case DT_VERNEED: | |
3656 | name = ".gnu.version_r"; | |
3657 | goto get_vma; | |
3658 | case DT_VERSYM: | |
3659 | name = ".gnu.version"; | |
3660 | get_vma: | |
3661 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
3662 | if (o == NULL) |
3663 | { | |
3664 | (*_bfd_error_handler) | |
3665 | (_("%s: could not find output section %s"), | |
3666 | bfd_get_filename (abfd), name); | |
3667 | goto error_return; | |
3668 | } | |
252b5132 RH |
3669 | dyn.d_un.d_ptr = o->vma; |
3670 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3671 | break; | |
3672 | ||
3673 | case DT_REL: | |
3674 | case DT_RELA: | |
3675 | case DT_RELSZ: | |
3676 | case DT_RELASZ: | |
3677 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
3678 | type = SHT_REL; | |
3679 | else | |
3680 | type = SHT_RELA; | |
3681 | dyn.d_un.d_val = 0; | |
9ad5cbcf | 3682 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
3683 | { |
3684 | Elf_Internal_Shdr *hdr; | |
3685 | ||
3686 | hdr = elf_elfsections (abfd)[i]; | |
3687 | if (hdr->sh_type == type | |
3688 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
3689 | { | |
3690 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
3691 | dyn.d_un.d_val += hdr->sh_size; | |
3692 | else | |
3693 | { | |
3694 | if (dyn.d_un.d_val == 0 | |
3695 | || hdr->sh_addr < dyn.d_un.d_val) | |
3696 | dyn.d_un.d_val = hdr->sh_addr; | |
3697 | } | |
3698 | } | |
3699 | } | |
3700 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
3701 | break; | |
3702 | } | |
3703 | } | |
3704 | } | |
3705 | ||
3706 | /* If we have created any dynamic sections, then output them. */ | |
3707 | if (dynobj != NULL) | |
3708 | { | |
3709 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
3710 | goto error_return; | |
3711 | ||
3712 | for (o = dynobj->sections; o != NULL; o = o->next) | |
3713 | { | |
3714 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
fc8c40a0 AM |
3715 | || o->_raw_size == 0 |
3716 | || o->output_section == bfd_abs_section_ptr) | |
252b5132 RH |
3717 | continue; |
3718 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
3719 | { | |
3720 | /* At this point, we are only interested in sections | |
45d6a902 | 3721 | created by _bfd_elf_link_create_dynamic_sections. */ |
252b5132 RH |
3722 | continue; |
3723 | } | |
3724 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
3725 | != SHT_STRTAB) | |
3726 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
3727 | { | |
3728 | if (! bfd_set_section_contents (abfd, o->output_section, | |
dc810e39 AM |
3729 | o->contents, |
3730 | (file_ptr) o->output_offset, | |
252b5132 RH |
3731 | o->_raw_size)) |
3732 | goto error_return; | |
3733 | } | |
3734 | else | |
3735 | { | |
252b5132 | 3736 | /* The contents of the .dynstr section are actually in a |
c44233aa | 3737 | stringtab. */ |
252b5132 RH |
3738 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
3739 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
2b0f7ef9 JJ |
3740 | || ! _bfd_elf_strtab_emit (abfd, |
3741 | elf_hash_table (info)->dynstr)) | |
252b5132 RH |
3742 | goto error_return; |
3743 | } | |
3744 | } | |
3745 | } | |
3746 | ||
1049f94e | 3747 | if (info->relocatable) |
1126897b | 3748 | { |
b34976b6 | 3749 | bfd_boolean failed = FALSE; |
1126897b AM |
3750 | |
3751 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
3752 | if (failed) | |
3753 | goto error_return; | |
3754 | } | |
3755 | ||
252b5132 RH |
3756 | /* If we have optimized stabs strings, output them. */ |
3757 | if (elf_hash_table (info)->stab_info != NULL) | |
3758 | { | |
3759 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
3760 | goto error_return; | |
3761 | } | |
3762 | ||
126495ed | 3763 | if (info->eh_frame_hdr) |
65765700 | 3764 | { |
126495ed AM |
3765 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
3766 | goto error_return; | |
65765700 JJ |
3767 | } |
3768 | ||
252b5132 RH |
3769 | if (finfo.symstrtab != NULL) |
3770 | _bfd_stringtab_free (finfo.symstrtab); | |
3771 | if (finfo.contents != NULL) | |
3772 | free (finfo.contents); | |
3773 | if (finfo.external_relocs != NULL) | |
3774 | free (finfo.external_relocs); | |
3775 | if (finfo.internal_relocs != NULL) | |
3776 | free (finfo.internal_relocs); | |
3777 | if (finfo.external_syms != NULL) | |
3778 | free (finfo.external_syms); | |
9ad5cbcf AM |
3779 | if (finfo.locsym_shndx != NULL) |
3780 | free (finfo.locsym_shndx); | |
252b5132 RH |
3781 | if (finfo.internal_syms != NULL) |
3782 | free (finfo.internal_syms); | |
3783 | if (finfo.indices != NULL) | |
3784 | free (finfo.indices); | |
3785 | if (finfo.sections != NULL) | |
3786 | free (finfo.sections); | |
3787 | if (finfo.symbuf != NULL) | |
3788 | free (finfo.symbuf); | |
9ad5cbcf | 3789 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 3790 | free (finfo.symshndxbuf); |
252b5132 RH |
3791 | for (o = abfd->sections; o != NULL; o = o->next) |
3792 | { | |
3793 | if ((o->flags & SEC_RELOC) != 0 | |
3794 | && elf_section_data (o)->rel_hashes != NULL) | |
c44233aa | 3795 | free (elf_section_data (o)->rel_hashes); |
252b5132 RH |
3796 | } |
3797 | ||
b34976b6 | 3798 | elf_tdata (abfd)->linker = TRUE; |
252b5132 | 3799 | |
b34976b6 | 3800 | return TRUE; |
252b5132 RH |
3801 | |
3802 | error_return: | |
3803 | if (finfo.symstrtab != NULL) | |
3804 | _bfd_stringtab_free (finfo.symstrtab); | |
3805 | if (finfo.contents != NULL) | |
3806 | free (finfo.contents); | |
3807 | if (finfo.external_relocs != NULL) | |
3808 | free (finfo.external_relocs); | |
3809 | if (finfo.internal_relocs != NULL) | |
3810 | free (finfo.internal_relocs); | |
3811 | if (finfo.external_syms != NULL) | |
3812 | free (finfo.external_syms); | |
9ad5cbcf AM |
3813 | if (finfo.locsym_shndx != NULL) |
3814 | free (finfo.locsym_shndx); | |
252b5132 RH |
3815 | if (finfo.internal_syms != NULL) |
3816 | free (finfo.internal_syms); | |
3817 | if (finfo.indices != NULL) | |
3818 | free (finfo.indices); | |
3819 | if (finfo.sections != NULL) | |
3820 | free (finfo.sections); | |
3821 | if (finfo.symbuf != NULL) | |
3822 | free (finfo.symbuf); | |
9ad5cbcf | 3823 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 3824 | free (finfo.symshndxbuf); |
252b5132 RH |
3825 | for (o = abfd->sections; o != NULL; o = o->next) |
3826 | { | |
3827 | if ((o->flags & SEC_RELOC) != 0 | |
3828 | && elf_section_data (o)->rel_hashes != NULL) | |
3829 | free (elf_section_data (o)->rel_hashes); | |
3830 | } | |
3831 | ||
b34976b6 | 3832 | return FALSE; |
252b5132 RH |
3833 | } |
3834 | ||
3835 | /* Add a symbol to the output symbol table. */ | |
3836 | ||
b34976b6 | 3837 | static bfd_boolean |
268b6b39 AM |
3838 | elf_link_output_sym (struct elf_final_link_info *finfo, |
3839 | const char *name, | |
3840 | Elf_Internal_Sym *elfsym, | |
754021d0 AM |
3841 | asection *input_sec, |
3842 | struct elf_link_hash_entry *h) | |
252b5132 | 3843 | { |
9ad5cbcf AM |
3844 | Elf_External_Sym *dest; |
3845 | Elf_External_Sym_Shndx *destshndx; | |
b34976b6 | 3846 | bfd_boolean (*output_symbol_hook) |
754021d0 AM |
3847 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
3848 | struct elf_link_hash_entry *); | |
252b5132 RH |
3849 | |
3850 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
3851 | elf_backend_link_output_symbol_hook; | |
3852 | if (output_symbol_hook != NULL) | |
3853 | { | |
754021d0 | 3854 | if (! (*output_symbol_hook) (finfo->info, name, elfsym, input_sec, h)) |
b34976b6 | 3855 | return FALSE; |
252b5132 RH |
3856 | } |
3857 | ||
268b6b39 | 3858 | if (name == NULL || *name == '\0') |
252b5132 RH |
3859 | elfsym->st_name = 0; |
3860 | else if (input_sec->flags & SEC_EXCLUDE) | |
3861 | elfsym->st_name = 0; | |
3862 | else | |
3863 | { | |
3864 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
b34976b6 | 3865 | name, TRUE, FALSE); |
252b5132 | 3866 | if (elfsym->st_name == (unsigned long) -1) |
b34976b6 | 3867 | return FALSE; |
252b5132 RH |
3868 | } |
3869 | ||
3870 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
3871 | { | |
3872 | if (! elf_link_flush_output_syms (finfo)) | |
b34976b6 | 3873 | return FALSE; |
252b5132 RH |
3874 | } |
3875 | ||
9ad5cbcf AM |
3876 | dest = finfo->symbuf + finfo->symbuf_count; |
3877 | destshndx = finfo->symshndxbuf; | |
3878 | if (destshndx != NULL) | |
c97e73dd AM |
3879 | { |
3880 | if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size) | |
3881 | { | |
3882 | bfd_size_type amt; | |
252b5132 | 3883 | |
c97e73dd AM |
3884 | amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); |
3885 | finfo->symshndxbuf = destshndx = bfd_realloc (destshndx, amt * 2); | |
3886 | if (destshndx == NULL) | |
b34976b6 | 3887 | return FALSE; |
c97e73dd AM |
3888 | memset ((char *) destshndx + amt, 0, amt); |
3889 | finfo->shndxbuf_size *= 2; | |
3890 | } | |
3891 | destshndx += bfd_get_symcount (finfo->output_bfd); | |
3892 | } | |
3893 | ||
268b6b39 | 3894 | elf_swap_symbol_out (finfo->output_bfd, elfsym, dest, destshndx); |
c97e73dd AM |
3895 | finfo->symbuf_count += 1; |
3896 | bfd_get_symcount (finfo->output_bfd) += 1; | |
252b5132 | 3897 | |
b34976b6 | 3898 | return TRUE; |
252b5132 RH |
3899 | } |
3900 | ||
3901 | /* Flush the output symbols to the file. */ | |
3902 | ||
b34976b6 | 3903 | static bfd_boolean |
268b6b39 | 3904 | elf_link_flush_output_syms (struct elf_final_link_info *finfo) |
252b5132 RH |
3905 | { |
3906 | if (finfo->symbuf_count > 0) | |
3907 | { | |
9ad5cbcf | 3908 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
3909 | file_ptr pos; |
3910 | bfd_size_type amt; | |
252b5132 | 3911 | |
9ad5cbcf AM |
3912 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
3913 | pos = hdr->sh_offset + hdr->sh_size; | |
dc810e39 AM |
3914 | amt = finfo->symbuf_count * sizeof (Elf_External_Sym); |
3915 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
268b6b39 | 3916 | || bfd_bwrite (finfo->symbuf, amt, finfo->output_bfd) != amt) |
b34976b6 | 3917 | return FALSE; |
252b5132 | 3918 | |
9ad5cbcf | 3919 | hdr->sh_size += amt; |
252b5132 RH |
3920 | finfo->symbuf_count = 0; |
3921 | } | |
3922 | ||
b34976b6 | 3923 | return TRUE; |
252b5132 RH |
3924 | } |
3925 | ||
f5d44ba0 AM |
3926 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
3927 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
71552942 L |
3928 | versioned symbol that would normally require an explicit version. |
3929 | We also handle the case that a DSO references a hidden symbol | |
3930 | which may be satisfied by a versioned symbol in another DSO. */ | |
f5d44ba0 | 3931 | |
b34976b6 | 3932 | static bfd_boolean |
268b6b39 AM |
3933 | elf_link_check_versioned_symbol (struct bfd_link_info *info, |
3934 | struct elf_link_hash_entry *h) | |
f5d44ba0 | 3935 | { |
71552942 | 3936 | bfd *abfd; |
f5d44ba0 | 3937 | struct elf_link_loaded_list *loaded; |
f5d44ba0 | 3938 | |
0eddce27 | 3939 | if (!is_elf_hash_table (info->hash)) |
b34976b6 | 3940 | return FALSE; |
f5d44ba0 | 3941 | |
71552942 L |
3942 | switch (h->root.type) |
3943 | { | |
3944 | default: | |
3945 | abfd = NULL; | |
3946 | break; | |
3947 | ||
3948 | case bfd_link_hash_undefined: | |
3949 | case bfd_link_hash_undefweak: | |
3950 | abfd = h->root.u.undef.abfd; | |
4a43e768 AM |
3951 | if ((abfd->flags & DYNAMIC) == 0 |
3952 | || elf_dyn_lib_class (abfd) != DYN_DT_NEEDED) | |
71552942 L |
3953 | return FALSE; |
3954 | break; | |
3955 | ||
3956 | case bfd_link_hash_defined: | |
3957 | case bfd_link_hash_defweak: | |
3958 | abfd = h->root.u.def.section->owner; | |
3959 | break; | |
3960 | ||
3961 | case bfd_link_hash_common: | |
3962 | abfd = h->root.u.c.p->section->owner; | |
3963 | break; | |
3964 | } | |
3965 | BFD_ASSERT (abfd != NULL); | |
3966 | ||
f5d44ba0 AM |
3967 | for (loaded = elf_hash_table (info)->loaded; |
3968 | loaded != NULL; | |
3969 | loaded = loaded->next) | |
3970 | { | |
3971 | bfd *input; | |
3972 | Elf_Internal_Shdr *hdr; | |
3973 | bfd_size_type symcount; | |
3974 | bfd_size_type extsymcount; | |
3975 | bfd_size_type extsymoff; | |
3976 | Elf_Internal_Shdr *versymhdr; | |
6cdc0ccc AM |
3977 | Elf_Internal_Sym *isym; |
3978 | Elf_Internal_Sym *isymend; | |
3979 | Elf_Internal_Sym *isymbuf; | |
f5d44ba0 | 3980 | Elf_External_Versym *ever; |
6cdc0ccc | 3981 | Elf_External_Versym *extversym; |
f5d44ba0 AM |
3982 | |
3983 | input = loaded->abfd; | |
3984 | ||
3985 | /* We check each DSO for a possible hidden versioned definition. */ | |
71552942 | 3986 | if (input == abfd |
f5d44ba0 AM |
3987 | || (input->flags & DYNAMIC) == 0 |
3988 | || elf_dynversym (input) == 0) | |
3989 | continue; | |
3990 | ||
3991 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
3992 | ||
3993 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
3994 | if (elf_bad_symtab (input)) | |
3995 | { | |
3996 | extsymcount = symcount; | |
3997 | extsymoff = 0; | |
3998 | } | |
3999 | else | |
4000 | { | |
4001 | extsymcount = symcount - hdr->sh_info; | |
4002 | extsymoff = hdr->sh_info; | |
4003 | } | |
4004 | ||
4005 | if (extsymcount == 0) | |
4006 | continue; | |
4007 | ||
6cdc0ccc AM |
4008 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, |
4009 | NULL, NULL, NULL); | |
4010 | if (isymbuf == NULL) | |
b34976b6 | 4011 | return FALSE; |
f5d44ba0 | 4012 | |
f5d44ba0 AM |
4013 | /* Read in any version definitions. */ |
4014 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
268b6b39 | 4015 | extversym = bfd_malloc (versymhdr->sh_size); |
f5d44ba0 AM |
4016 | if (extversym == NULL) |
4017 | goto error_ret; | |
4018 | ||
4019 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
268b6b39 | 4020 | || (bfd_bread (extversym, versymhdr->sh_size, input) |
f5d44ba0 AM |
4021 | != versymhdr->sh_size)) |
4022 | { | |
4023 | free (extversym); | |
4024 | error_ret: | |
6cdc0ccc | 4025 | free (isymbuf); |
b34976b6 | 4026 | return FALSE; |
f5d44ba0 AM |
4027 | } |
4028 | ||
4029 | ever = extversym + extsymoff; | |
6cdc0ccc AM |
4030 | isymend = isymbuf + extsymcount; |
4031 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
f5d44ba0 AM |
4032 | { |
4033 | const char *name; | |
f5d44ba0 | 4034 | Elf_Internal_Versym iver; |
a15d9d3a | 4035 | unsigned short version_index; |
f5d44ba0 | 4036 | |
6cdc0ccc AM |
4037 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL |
4038 | || isym->st_shndx == SHN_UNDEF) | |
f5d44ba0 AM |
4039 | continue; |
4040 | ||
4041 | name = bfd_elf_string_from_elf_section (input, | |
4042 | hdr->sh_link, | |
6cdc0ccc | 4043 | isym->st_name); |
f5d44ba0 AM |
4044 | if (strcmp (name, h->root.root.string) != 0) |
4045 | continue; | |
4046 | ||
4047 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
4048 | ||
4049 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
4050 | { | |
4051 | /* If we have a non-hidden versioned sym, then it should | |
4052 | have provided a definition for the undefined sym. */ | |
4053 | abort (); | |
4054 | } | |
4055 | ||
a15d9d3a L |
4056 | version_index = iver.vs_vers & VERSYM_VERSION; |
4057 | if (version_index == 1 || version_index == 2) | |
f5d44ba0 | 4058 | { |
a15d9d3a | 4059 | /* This is the base or first version. We can use it. */ |
f5d44ba0 | 4060 | free (extversym); |
6cdc0ccc | 4061 | free (isymbuf); |
b34976b6 | 4062 | return TRUE; |
f5d44ba0 AM |
4063 | } |
4064 | } | |
4065 | ||
4066 | free (extversym); | |
6cdc0ccc | 4067 | free (isymbuf); |
f5d44ba0 AM |
4068 | } |
4069 | ||
b34976b6 | 4070 | return FALSE; |
f5d44ba0 AM |
4071 | } |
4072 | ||
252b5132 RH |
4073 | /* Add an external symbol to the symbol table. This is called from |
4074 | the hash table traversal routine. When generating a shared object, | |
4075 | we go through the symbol table twice. The first time we output | |
4076 | anything that might have been forced to local scope in a version | |
4077 | script. The second time we output the symbols that are still | |
4078 | global symbols. */ | |
4079 | ||
b34976b6 | 4080 | static bfd_boolean |
268b6b39 | 4081 | elf_link_output_extsym (struct elf_link_hash_entry *h, void *data) |
252b5132 | 4082 | { |
268b6b39 | 4083 | struct elf_outext_info *eoinfo = data; |
252b5132 | 4084 | struct elf_final_link_info *finfo = eoinfo->finfo; |
b34976b6 | 4085 | bfd_boolean strip; |
252b5132 RH |
4086 | Elf_Internal_Sym sym; |
4087 | asection *input_sec; | |
4088 | ||
e92d460e AM |
4089 | if (h->root.type == bfd_link_hash_warning) |
4090 | { | |
4091 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4092 | if (h->root.type == bfd_link_hash_new) | |
b34976b6 | 4093 | return TRUE; |
e92d460e AM |
4094 | } |
4095 | ||
252b5132 RH |
4096 | /* Decide whether to output this symbol in this pass. */ |
4097 | if (eoinfo->localsyms) | |
4098 | { | |
4099 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 4100 | return TRUE; |
252b5132 RH |
4101 | } |
4102 | else | |
4103 | { | |
4104 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
b34976b6 | 4105 | return TRUE; |
252b5132 RH |
4106 | } |
4107 | ||
560e09e9 NC |
4108 | /* If we have an undefined symbol reference here then it must have |
4109 | come from a shared library that is being linked in. (Undefined | |
4110 | references in regular files have already been handled). If we | |
4111 | are reporting errors for this situation then do so now. */ | |
4112 | if (h->root.type == bfd_link_hash_undefined | |
252b5132 | 4113 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 |
f5d44ba0 | 4114 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
560e09e9 NC |
4115 | && ! elf_link_check_versioned_symbol (finfo->info, h) |
4116 | && finfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
252b5132 RH |
4117 | { |
4118 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
4119 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
560e09e9 | 4120 | NULL, 0, finfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR))) |
252b5132 | 4121 | { |
b34976b6 AM |
4122 | eoinfo->failed = TRUE; |
4123 | return FALSE; | |
252b5132 RH |
4124 | } |
4125 | } | |
4126 | ||
1b1fe8fe L |
4127 | /* We should also warn if a forced local symbol is referenced from |
4128 | shared libraries. */ | |
1049f94e | 4129 | if (! finfo->info->relocatable |
560e09e9 | 4130 | && (! finfo->info->shared) |
1b1fe8fe | 4131 | && (h->elf_link_hash_flags |
560e09e9 | 4132 | & (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_DYNAMIC_DEF | ELF_LINK_DYNAMIC_WEAK)) |
71552942 L |
4133 | == (ELF_LINK_FORCED_LOCAL | ELF_LINK_HASH_REF_DYNAMIC) |
4134 | && ! elf_link_check_versioned_symbol (finfo->info, h)) | |
1b1fe8fe L |
4135 | { |
4136 | (*_bfd_error_handler) | |
4137 | (_("%s: %s symbol `%s' in %s is referenced by DSO"), | |
4138 | bfd_get_filename (finfo->output_bfd), | |
4139 | ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
4140 | ? "internal" | |
4141 | : ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
4142 | ? "hidden" : "local", | |
4143 | h->root.root.string, | |
4144 | bfd_archive_filename (h->root.u.def.section->owner)); | |
4145 | eoinfo->failed = TRUE; | |
4146 | return FALSE; | |
4147 | } | |
4148 | ||
252b5132 RH |
4149 | /* We don't want to output symbols that have never been mentioned by |
4150 | a regular file, or that we have been told to strip. However, if | |
4151 | h->indx is set to -2, the symbol is used by a reloc and we must | |
4152 | output it. */ | |
4153 | if (h->indx == -2) | |
b34976b6 | 4154 | strip = FALSE; |
252b5132 RH |
4155 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
4156 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
4157 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
4158 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
b34976b6 | 4159 | strip = TRUE; |
75828352 AM |
4160 | else if (finfo->info->strip == strip_all) |
4161 | strip = TRUE; | |
4162 | else if (finfo->info->strip == strip_some | |
4163 | && bfd_hash_lookup (finfo->info->keep_hash, | |
4164 | h->root.root.string, FALSE, FALSE) == NULL) | |
4165 | strip = TRUE; | |
4166 | else if (finfo->info->strip_discarded | |
4167 | && (h->root.type == bfd_link_hash_defined | |
4168 | || h->root.type == bfd_link_hash_defweak) | |
4169 | && elf_discarded_section (h->root.u.def.section)) | |
b34976b6 | 4170 | strip = TRUE; |
252b5132 | 4171 | else |
b34976b6 | 4172 | strip = FALSE; |
252b5132 RH |
4173 | |
4174 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
2bd171e0 ILT |
4175 | nothing else to do unless it is a forced local symbol. */ |
4176 | if (strip | |
4177 | && h->dynindx == -1 | |
4178 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 4179 | return TRUE; |
252b5132 RH |
4180 | |
4181 | sym.st_value = 0; | |
4182 | sym.st_size = h->size; | |
4183 | sym.st_other = h->other; | |
4184 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
4185 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
4186 | else if (h->root.type == bfd_link_hash_undefweak | |
4187 | || h->root.type == bfd_link_hash_defweak) | |
4188 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
4189 | else | |
4190 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
4191 | ||
4192 | switch (h->root.type) | |
4193 | { | |
4194 | default: | |
4195 | case bfd_link_hash_new: | |
e92d460e | 4196 | case bfd_link_hash_warning: |
252b5132 | 4197 | abort (); |
b34976b6 | 4198 | return FALSE; |
252b5132 RH |
4199 | |
4200 | case bfd_link_hash_undefined: | |
252b5132 RH |
4201 | case bfd_link_hash_undefweak: |
4202 | input_sec = bfd_und_section_ptr; | |
4203 | sym.st_shndx = SHN_UNDEF; | |
4204 | break; | |
4205 | ||
4206 | case bfd_link_hash_defined: | |
4207 | case bfd_link_hash_defweak: | |
4208 | { | |
4209 | input_sec = h->root.u.def.section; | |
4210 | if (input_sec->output_section != NULL) | |
4211 | { | |
4212 | sym.st_shndx = | |
4213 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
4214 | input_sec->output_section); | |
9ad5cbcf | 4215 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
4216 | { |
4217 | (*_bfd_error_handler) | |
4218 | (_("%s: could not find output section %s for input section %s"), | |
4219 | bfd_get_filename (finfo->output_bfd), | |
4220 | input_sec->output_section->name, | |
4221 | input_sec->name); | |
b34976b6 AM |
4222 | eoinfo->failed = TRUE; |
4223 | return FALSE; | |
252b5132 RH |
4224 | } |
4225 | ||
1049f94e AM |
4226 | /* ELF symbols in relocatable files are section relative, |
4227 | but in nonrelocatable files they are virtual | |
252b5132 RH |
4228 | addresses. */ |
4229 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
1049f94e | 4230 | if (! finfo->info->relocatable) |
13ae64f3 JJ |
4231 | { |
4232 | sym.st_value += input_sec->output_section->vma; | |
4233 | if (h->type == STT_TLS) | |
4234 | { | |
4235 | /* STT_TLS symbols are relative to PT_TLS segment | |
4236 | base. */ | |
e1918d23 AM |
4237 | BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL); |
4238 | sym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma; | |
13ae64f3 JJ |
4239 | } |
4240 | } | |
252b5132 RH |
4241 | } |
4242 | else | |
4243 | { | |
4244 | BFD_ASSERT (input_sec->owner == NULL | |
4245 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
4246 | sym.st_shndx = SHN_UNDEF; | |
4247 | input_sec = bfd_und_section_ptr; | |
4248 | } | |
4249 | } | |
4250 | break; | |
4251 | ||
4252 | case bfd_link_hash_common: | |
4253 | input_sec = h->root.u.c.p->section; | |
4254 | sym.st_shndx = SHN_COMMON; | |
4255 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
4256 | break; | |
4257 | ||
4258 | case bfd_link_hash_indirect: | |
4259 | /* These symbols are created by symbol versioning. They point | |
c44233aa AM |
4260 | to the decorated version of the name. For example, if the |
4261 | symbol foo@@GNU_1.2 is the default, which should be used when | |
4262 | foo is used with no version, then we add an indirect symbol | |
4263 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
4264 | since the indirected symbol is already in the hash table. */ | |
b34976b6 | 4265 | return TRUE; |
252b5132 RH |
4266 | } |
4267 | ||
4268 | /* Give the processor backend a chance to tweak the symbol value, | |
4269 | and also to finish up anything that needs to be done for this | |
c44233aa AM |
4270 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for |
4271 | forced local syms when non-shared is due to a historical quirk. */ | |
252b5132 RH |
4272 | if ((h->dynindx != -1 |
4273 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
ef5aade5 L |
4274 | && ((finfo->info->shared |
4275 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
4276 | || h->root.type != bfd_link_hash_undefweak)) | |
c44233aa | 4277 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
252b5132 RH |
4278 | && elf_hash_table (finfo->info)->dynamic_sections_created) |
4279 | { | |
9c5bfbb7 | 4280 | const struct elf_backend_data *bed; |
252b5132 RH |
4281 | |
4282 | bed = get_elf_backend_data (finfo->output_bfd); | |
4283 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
4284 | (finfo->output_bfd, finfo->info, h, &sym))) | |
4285 | { | |
b34976b6 AM |
4286 | eoinfo->failed = TRUE; |
4287 | return FALSE; | |
252b5132 RH |
4288 | } |
4289 | } | |
4290 | ||
4291 | /* If we are marking the symbol as undefined, and there are no | |
4292 | non-weak references to this symbol from a regular object, then | |
91d3970e ILT |
4293 | mark the symbol as weak undefined; if there are non-weak |
4294 | references, mark the symbol as strong. We can't do this earlier, | |
252b5132 RH |
4295 | because it might not be marked as undefined until the |
4296 | finish_dynamic_symbol routine gets through with it. */ | |
4297 | if (sym.st_shndx == SHN_UNDEF | |
252b5132 | 4298 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 |
a7b97311 AM |
4299 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
4300 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
91d3970e ILT |
4301 | { |
4302 | int bindtype; | |
4303 | ||
4304 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0) | |
4305 | bindtype = STB_GLOBAL; | |
4306 | else | |
4307 | bindtype = STB_WEAK; | |
4308 | sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info)); | |
4309 | } | |
252b5132 | 4310 | |
1b1fe8fe L |
4311 | /* If a non-weak symbol with non-default visibility is not defined |
4312 | locally, it is a fatal error. */ | |
1049f94e | 4313 | if (! finfo->info->relocatable |
9c7a29a3 | 4314 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
1b1fe8fe | 4315 | && ELF_ST_BIND (sym.st_info) != STB_WEAK |
22d5e339 | 4316 | && h->root.type == bfd_link_hash_undefined |
2cd533b7 | 4317 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
1b1fe8fe L |
4318 | { |
4319 | (*_bfd_error_handler) | |
4320 | (_("%s: %s symbol `%s' isn't defined"), | |
4321 | bfd_get_filename (finfo->output_bfd), | |
4322 | ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED | |
4323 | ? "protected" | |
4324 | : ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL | |
4325 | ? "internal" : "hidden", | |
4326 | h->root.root.string); | |
4327 | eoinfo->failed = TRUE; | |
4328 | return FALSE; | |
4329 | } | |
32c092c3 | 4330 | |
252b5132 | 4331 | /* If this symbol should be put in the .dynsym section, then put it |
f5d44ba0 AM |
4332 | there now. We already know the symbol index. We also fill in |
4333 | the entry in the .hash section. */ | |
252b5132 RH |
4334 | if (h->dynindx != -1 |
4335 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
4336 | { | |
4337 | size_t bucketcount; | |
4338 | size_t bucket; | |
c7ac6ff8 | 4339 | size_t hash_entry_size; |
252b5132 RH |
4340 | bfd_byte *bucketpos; |
4341 | bfd_vma chain; | |
dc810e39 | 4342 | Elf_External_Sym *esym; |
252b5132 RH |
4343 | |
4344 | sym.st_name = h->dynstr_index; | |
dc810e39 | 4345 | esym = (Elf_External_Sym *) finfo->dynsym_sec->contents + h->dynindx; |
268b6b39 | 4346 | elf_swap_symbol_out (finfo->output_bfd, &sym, esym, 0); |
252b5132 RH |
4347 | |
4348 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
4349 | bucket = h->elf_hash_value % bucketcount; | |
3e932841 | 4350 | hash_entry_size |
c7ac6ff8 | 4351 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; |
252b5132 | 4352 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
c7ac6ff8 MM |
4353 | + (bucket + 2) * hash_entry_size); |
4354 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
268b6b39 | 4355 | bfd_put (8 * hash_entry_size, finfo->output_bfd, h->dynindx, bucketpos); |
c7ac6ff8 MM |
4356 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, |
4357 | ((bfd_byte *) finfo->hash_sec->contents | |
4358 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
252b5132 RH |
4359 | |
4360 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
4361 | { | |
4362 | Elf_Internal_Versym iversym; | |
dc810e39 | 4363 | Elf_External_Versym *eversym; |
252b5132 RH |
4364 | |
4365 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
4366 | { | |
4367 | if (h->verinfo.verdef == NULL) | |
4368 | iversym.vs_vers = 0; | |
4369 | else | |
4370 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
4371 | } | |
4372 | else | |
4373 | { | |
4374 | if (h->verinfo.vertree == NULL) | |
4375 | iversym.vs_vers = 1; | |
4376 | else | |
4377 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
4378 | } | |
4379 | ||
4380 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
4381 | iversym.vs_vers |= VERSYM_HIDDEN; | |
4382 | ||
dc810e39 AM |
4383 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; |
4384 | eversym += h->dynindx; | |
4385 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
252b5132 RH |
4386 | } |
4387 | } | |
4388 | ||
4389 | /* If we're stripping it, then it was just a dynamic symbol, and | |
4390 | there's nothing else to do. */ | |
7330fb86 | 4391 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) |
b34976b6 | 4392 | return TRUE; |
252b5132 RH |
4393 | |
4394 | h->indx = bfd_get_symcount (finfo->output_bfd); | |
4395 | ||
754021d0 | 4396 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec, h)) |
252b5132 | 4397 | { |
b34976b6 AM |
4398 | eoinfo->failed = TRUE; |
4399 | return FALSE; | |
252b5132 RH |
4400 | } |
4401 | ||
b34976b6 | 4402 | return TRUE; |
252b5132 RH |
4403 | } |
4404 | ||
4405 | /* Link an input file into the linker output file. This function | |
4406 | handles all the sections and relocations of the input file at once. | |
4407 | This is so that we only have to read the local symbols once, and | |
4408 | don't have to keep them in memory. */ | |
4409 | ||
b34976b6 | 4410 | static bfd_boolean |
268b6b39 | 4411 | elf_link_input_bfd (struct elf_final_link_info *finfo, bfd *input_bfd) |
252b5132 | 4412 | { |
b34976b6 | 4413 | bfd_boolean (*relocate_section) |
268b6b39 AM |
4414 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
4415 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
252b5132 RH |
4416 | bfd *output_bfd; |
4417 | Elf_Internal_Shdr *symtab_hdr; | |
4418 | size_t locsymcount; | |
4419 | size_t extsymoff; | |
6cdc0ccc | 4420 | Elf_Internal_Sym *isymbuf; |
252b5132 | 4421 | Elf_Internal_Sym *isym; |
6cdc0ccc | 4422 | Elf_Internal_Sym *isymend; |
252b5132 RH |
4423 | long *pindex; |
4424 | asection **ppsection; | |
4425 | asection *o; | |
9c5bfbb7 | 4426 | const struct elf_backend_data *bed; |
b34976b6 | 4427 | bfd_boolean emit_relocs; |
f8deed93 | 4428 | struct elf_link_hash_entry **sym_hashes; |
252b5132 RH |
4429 | |
4430 | output_bfd = finfo->output_bfd; | |
c7ac6ff8 MM |
4431 | bed = get_elf_backend_data (output_bfd); |
4432 | relocate_section = bed->elf_backend_relocate_section; | |
252b5132 RH |
4433 | |
4434 | /* If this is a dynamic object, we don't want to do anything here: | |
4435 | we don't want the local symbols, and we don't want the section | |
4436 | contents. */ | |
4437 | if ((input_bfd->flags & DYNAMIC) != 0) | |
b34976b6 | 4438 | return TRUE; |
252b5132 | 4439 | |
1049f94e | 4440 | emit_relocs = (finfo->info->relocatable |
c44233aa AM |
4441 | || finfo->info->emitrelocations |
4442 | || bed->elf_backend_emit_relocs); | |
9317eacc | 4443 | |
252b5132 RH |
4444 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
4445 | if (elf_bad_symtab (input_bfd)) | |
4446 | { | |
4447 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
4448 | extsymoff = 0; | |
4449 | } | |
4450 | else | |
4451 | { | |
4452 | locsymcount = symtab_hdr->sh_info; | |
4453 | extsymoff = symtab_hdr->sh_info; | |
4454 | } | |
4455 | ||
4456 | /* Read the local symbols. */ | |
6cdc0ccc AM |
4457 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
4458 | if (isymbuf == NULL && locsymcount != 0) | |
4459 | { | |
4460 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
4461 | finfo->internal_syms, | |
4462 | finfo->external_syms, | |
4463 | finfo->locsym_shndx); | |
4464 | if (isymbuf == NULL) | |
b34976b6 | 4465 | return FALSE; |
252b5132 RH |
4466 | } |
4467 | ||
6cdc0ccc AM |
4468 | /* Find local symbol sections and adjust values of symbols in |
4469 | SEC_MERGE sections. Write out those local symbols we know are | |
4470 | going into the output file. */ | |
4471 | isymend = isymbuf + locsymcount; | |
4472 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
4473 | isym < isymend; | |
4474 | isym++, pindex++, ppsection++) | |
252b5132 RH |
4475 | { |
4476 | asection *isec; | |
4477 | const char *name; | |
4478 | Elf_Internal_Sym osym; | |
4479 | ||
252b5132 RH |
4480 | *pindex = -1; |
4481 | ||
4482 | if (elf_bad_symtab (input_bfd)) | |
4483 | { | |
4484 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
4485 | { | |
4486 | *ppsection = NULL; | |
4487 | continue; | |
4488 | } | |
4489 | } | |
4490 | ||
4491 | if (isym->st_shndx == SHN_UNDEF) | |
862517b6 | 4492 | isec = bfd_und_section_ptr; |
9ad5cbcf AM |
4493 | else if (isym->st_shndx < SHN_LORESERVE |
4494 | || isym->st_shndx > SHN_HIRESERVE) | |
f5fa8ca2 JJ |
4495 | { |
4496 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
65765700 | 4497 | if (isec |
68bfbfcc | 4498 | && isec->sec_info_type == ELF_INFO_TYPE_MERGE |
f5fa8ca2 JJ |
4499 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
4500 | isym->st_value = | |
4501 | _bfd_merged_section_offset (output_bfd, &isec, | |
65765700 | 4502 | elf_section_data (isec)->sec_info, |
268b6b39 | 4503 | isym->st_value, 0); |
f5fa8ca2 | 4504 | } |
252b5132 | 4505 | else if (isym->st_shndx == SHN_ABS) |
862517b6 | 4506 | isec = bfd_abs_section_ptr; |
252b5132 | 4507 | else if (isym->st_shndx == SHN_COMMON) |
862517b6 | 4508 | isec = bfd_com_section_ptr; |
252b5132 RH |
4509 | else |
4510 | { | |
4511 | /* Who knows? */ | |
4512 | isec = NULL; | |
4513 | } | |
4514 | ||
4515 | *ppsection = isec; | |
4516 | ||
4517 | /* Don't output the first, undefined, symbol. */ | |
6cdc0ccc | 4518 | if (ppsection == finfo->sections) |
252b5132 RH |
4519 | continue; |
4520 | ||
24376d1b AM |
4521 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
4522 | { | |
24376d1b AM |
4523 | /* We never output section symbols. Instead, we use the |
4524 | section symbol of the corresponding section in the output | |
4525 | file. */ | |
4526 | continue; | |
4527 | } | |
4528 | ||
252b5132 RH |
4529 | /* If we are stripping all symbols, we don't want to output this |
4530 | one. */ | |
4531 | if (finfo->info->strip == strip_all) | |
4532 | continue; | |
4533 | ||
252b5132 | 4534 | /* If we are discarding all local symbols, we don't want to |
1049f94e | 4535 | output this one. If we are generating a relocatable output |
252b5132 RH |
4536 | file, then some of the local symbols may be required by |
4537 | relocs; we output them below as we discover that they are | |
4538 | needed. */ | |
4539 | if (finfo->info->discard == discard_all) | |
4540 | continue; | |
4541 | ||
4542 | /* If this symbol is defined in a section which we are | |
c44233aa AM |
4543 | discarding, we don't need to keep it, but note that |
4544 | linker_mark is only reliable for sections that have contents. | |
4545 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
4546 | as well as linker_mark. */ | |
9ad5cbcf | 4547 | if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 RH |
4548 | && isec != NULL |
4549 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) | |
1049f94e | 4550 | || (! finfo->info->relocatable |
252b5132 RH |
4551 | && (isec->flags & SEC_EXCLUDE) != 0))) |
4552 | continue; | |
4553 | ||
4554 | /* Get the name of the symbol. */ | |
4555 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
4556 | isym->st_name); | |
4557 | if (name == NULL) | |
b34976b6 | 4558 | return FALSE; |
252b5132 RH |
4559 | |
4560 | /* See if we are discarding symbols with this name. */ | |
4561 | if ((finfo->info->strip == strip_some | |
b34976b6 | 4562 | && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) |
252b5132 | 4563 | == NULL)) |
f5fa8ca2 | 4564 | || (((finfo->info->discard == discard_sec_merge |
1049f94e | 4565 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocatable) |
f5fa8ca2 | 4566 | || finfo->info->discard == discard_l) |
252b5132 RH |
4567 | && bfd_is_local_label_name (input_bfd, name))) |
4568 | continue; | |
4569 | ||
4570 | /* If we get here, we are going to output this symbol. */ | |
4571 | ||
4572 | osym = *isym; | |
4573 | ||
4574 | /* Adjust the section index for the output file. */ | |
4575 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
4576 | isec->output_section); | |
9ad5cbcf | 4577 | if (osym.st_shndx == SHN_BAD) |
b34976b6 | 4578 | return FALSE; |
252b5132 RH |
4579 | |
4580 | *pindex = bfd_get_symcount (output_bfd); | |
4581 | ||
1049f94e | 4582 | /* ELF symbols in relocatable files are section relative, but |
252b5132 RH |
4583 | in executable files they are virtual addresses. Note that |
4584 | this code assumes that all ELF sections have an associated | |
4585 | BFD section with a reasonable value for output_offset; below | |
4586 | we assume that they also have a reasonable value for | |
4587 | output_section. Any special sections must be set up to meet | |
4588 | these requirements. */ | |
4589 | osym.st_value += isec->output_offset; | |
1049f94e | 4590 | if (! finfo->info->relocatable) |
13ae64f3 JJ |
4591 | { |
4592 | osym.st_value += isec->output_section->vma; | |
4593 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
4594 | { | |
4595 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
e1918d23 AM |
4596 | BFD_ASSERT (elf_hash_table (finfo->info)->tls_sec != NULL); |
4597 | osym.st_value -= elf_hash_table (finfo->info)->tls_sec->vma; | |
13ae64f3 JJ |
4598 | } |
4599 | } | |
252b5132 | 4600 | |
754021d0 | 4601 | if (! elf_link_output_sym (finfo, name, &osym, isec, NULL)) |
b34976b6 | 4602 | return FALSE; |
252b5132 RH |
4603 | } |
4604 | ||
4605 | /* Relocate the contents of each section. */ | |
f8deed93 | 4606 | sym_hashes = elf_sym_hashes (input_bfd); |
252b5132 RH |
4607 | for (o = input_bfd->sections; o != NULL; o = o->next) |
4608 | { | |
4609 | bfd_byte *contents; | |
4610 | ||
4611 | if (! o->linker_mark) | |
4612 | { | |
4613 | /* This section was omitted from the link. */ | |
4614 | continue; | |
4615 | } | |
4616 | ||
4617 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
4618 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
4619 | continue; | |
4620 | ||
4621 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
4622 | { | |
45d6a902 | 4623 | /* Section was created by _bfd_elf_link_create_dynamic_sections |
252b5132 RH |
4624 | or somesuch. */ |
4625 | continue; | |
4626 | } | |
4627 | ||
4628 | /* Get the contents of the section. They have been cached by a | |
c44233aa AM |
4629 | relaxation routine. Note that o is a section in an input |
4630 | file, so the contents field will not have been set by any of | |
4631 | the routines which work on output files. */ | |
252b5132 RH |
4632 | if (elf_section_data (o)->this_hdr.contents != NULL) |
4633 | contents = elf_section_data (o)->this_hdr.contents; | |
4634 | else | |
4635 | { | |
4636 | contents = finfo->contents; | |
268b6b39 AM |
4637 | if (! bfd_get_section_contents (input_bfd, o, contents, 0, |
4638 | o->_raw_size)) | |
b34976b6 | 4639 | return FALSE; |
252b5132 RH |
4640 | } |
4641 | ||
4642 | if ((o->flags & SEC_RELOC) != 0) | |
4643 | { | |
4644 | Elf_Internal_Rela *internal_relocs; | |
4645 | ||
4646 | /* Get the swapped relocs. */ | |
45d6a902 AM |
4647 | internal_relocs |
4648 | = _bfd_elf_link_read_relocs (input_bfd, o, finfo->external_relocs, | |
4649 | finfo->internal_relocs, FALSE); | |
252b5132 RH |
4650 | if (internal_relocs == NULL |
4651 | && o->reloc_count > 0) | |
b34976b6 | 4652 | return FALSE; |
252b5132 | 4653 | |
ec338859 AM |
4654 | /* Run through the relocs looking for any against symbols |
4655 | from discarded sections and section symbols from | |
4656 | removed link-once sections. Complain about relocs | |
4657 | against discarded sections. Zero relocs against removed | |
f97b9cb8 L |
4658 | link-once sections. Preserve debug information as much |
4659 | as we can. */ | |
4660 | if (!elf_section_ignore_discarded_relocs (o)) | |
ec338859 AM |
4661 | { |
4662 | Elf_Internal_Rela *rel, *relend; | |
50b4d486 | 4663 | |
ec338859 AM |
4664 | rel = internal_relocs; |
4665 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
4666 | for ( ; rel < relend; rel++) | |
4667 | { | |
4668 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
f97b9cb8 | 4669 | asection *sec; |
ec338859 AM |
4670 | |
4671 | if (r_symndx >= locsymcount | |
4672 | || (elf_bad_symtab (input_bfd) | |
4673 | && finfo->sections[r_symndx] == NULL)) | |
4674 | { | |
4675 | struct elf_link_hash_entry *h; | |
4676 | ||
4677 | h = sym_hashes[r_symndx - extsymoff]; | |
4678 | while (h->root.type == bfd_link_hash_indirect | |
4679 | || h->root.type == bfd_link_hash_warning) | |
4680 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4681 | ||
4682 | /* Complain if the definition comes from a | |
4683 | discarded section. */ | |
f97b9cb8 | 4684 | sec = h->root.u.def.section; |
ec338859 AM |
4685 | if ((h->root.type == bfd_link_hash_defined |
4686 | || h->root.type == bfd_link_hash_defweak) | |
f97b9cb8 | 4687 | && elf_discarded_section (sec)) |
ec338859 | 4688 | { |
ec338859 AM |
4689 | if ((o->flags & SEC_DEBUGGING) != 0) |
4690 | { | |
45e9217a | 4691 | BFD_ASSERT (r_symndx != 0); |
f97b9cb8 L |
4692 | /* Try to preserve debug information. */ |
4693 | if ((o->flags & SEC_DEBUGGING) != 0 | |
4694 | && sec->kept_section != NULL | |
6e35c4da | 4695 | && sec->_raw_size == sec->kept_section->_raw_size) |
f97b9cb8 L |
4696 | h->root.u.def.section |
4697 | = sec->kept_section; | |
4698 | else | |
4699 | memset (rel, 0, sizeof (*rel)); | |
ec338859 AM |
4700 | } |
4701 | else | |
6f6f27f8 L |
4702 | finfo->info->callbacks->error_handler |
4703 | (LD_DEFINITION_IN_DISCARDED_SECTION, | |
4704 | _("%T: discarded in section `%s' from %s\n"), | |
4705 | h->root.root.string, | |
4706 | h->root.root.string, | |
4707 | h->root.u.def.section->name, | |
4708 | bfd_archive_filename (h->root.u.def.section->owner)); | |
ec338859 AM |
4709 | } |
4710 | } | |
4711 | else | |
4712 | { | |
f97b9cb8 | 4713 | sec = finfo->sections[r_symndx]; |
50b4d486 | 4714 | |
ed4de5e2 | 4715 | if (sec != NULL && elf_discarded_section (sec)) |
f9f32305 | 4716 | { |
ad43ed4c L |
4717 | if ((o->flags & SEC_DEBUGGING) != 0 |
4718 | || (sec->flags & SEC_LINK_ONCE) != 0) | |
f9f32305 | 4719 | { |
45e9217a | 4720 | BFD_ASSERT (r_symndx != 0); |
f97b9cb8 L |
4721 | /* Try to preserve debug information. */ |
4722 | if ((o->flags & SEC_DEBUGGING) != 0 | |
4723 | && sec->kept_section != NULL | |
6e35c4da | 4724 | && sec->_raw_size == sec->kept_section->_raw_size) |
f97b9cb8 L |
4725 | finfo->sections[r_symndx] |
4726 | = sec->kept_section; | |
4727 | else | |
4728 | { | |
4729 | rel->r_info | |
4730 | = ELF_R_INFO (0, ELF_R_TYPE (rel->r_info)); | |
4731 | rel->r_addend = 0; | |
4732 | } | |
f9f32305 AM |
4733 | } |
4734 | else | |
f9f32305 | 4735 | { |
6f6f27f8 L |
4736 | static int count; |
4737 | int ok; | |
4738 | char *buf; | |
4739 | ||
4740 | ok = asprintf (&buf, "local symbol %d", | |
4741 | count++); | |
4742 | if (ok <= 0) | |
4743 | buf = (char *) "local symbol"; | |
4744 | finfo->info->callbacks->error_handler | |
4745 | (LD_DEFINITION_IN_DISCARDED_SECTION, | |
4746 | _("%T: discarded in section `%s' from %s\n"), | |
4747 | buf, buf, sec->name, | |
4748 | bfd_archive_filename (input_bfd)); | |
4749 | if (ok != -1) | |
f9f32305 | 4750 | free (buf); |
ec338859 AM |
4751 | } |
4752 | } | |
4753 | } | |
4754 | } | |
4755 | } | |
50b4d486 | 4756 | |
252b5132 RH |
4757 | /* Relocate the section by invoking a back end routine. |
4758 | ||
4759 | The back end routine is responsible for adjusting the | |
4760 | section contents as necessary, and (if using Rela relocs | |
1049f94e | 4761 | and generating a relocatable output file) adjusting the |
252b5132 RH |
4762 | reloc addend as necessary. |
4763 | ||
4764 | The back end routine does not have to worry about setting | |
4765 | the reloc address or the reloc symbol index. | |
4766 | ||
4767 | The back end routine is given a pointer to the swapped in | |
4768 | internal symbols, and can access the hash table entries | |
4769 | for the external symbols via elf_sym_hashes (input_bfd). | |
4770 | ||
1049f94e | 4771 | When generating relocatable output, the back end routine |
252b5132 RH |
4772 | must handle STB_LOCAL/STT_SECTION symbols specially. The |
4773 | output symbol is going to be a section symbol | |
4774 | corresponding to the output section, which will require | |
4775 | the addend to be adjusted. */ | |
4776 | ||
4777 | if (! (*relocate_section) (output_bfd, finfo->info, | |
4778 | input_bfd, o, contents, | |
4779 | internal_relocs, | |
6cdc0ccc | 4780 | isymbuf, |
252b5132 | 4781 | finfo->sections)) |
b34976b6 | 4782 | return FALSE; |
252b5132 | 4783 | |
9317eacc | 4784 | if (emit_relocs) |
252b5132 RH |
4785 | { |
4786 | Elf_Internal_Rela *irela; | |
4787 | Elf_Internal_Rela *irelaend; | |
73722af0 | 4788 | bfd_vma last_offset; |
252b5132 | 4789 | struct elf_link_hash_entry **rel_hash; |
c89583f8 | 4790 | Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2; |
4e8a9624 | 4791 | unsigned int next_erel; |
b34976b6 | 4792 | bfd_boolean (*reloc_emitter) |
268b6b39 | 4793 | (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *); |
b34976b6 | 4794 | bfd_boolean rela_normal; |
b491616a AM |
4795 | |
4796 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
4797 | rela_normal = (bed->rela_normal | |
4798 | && (input_rel_hdr->sh_entsize | |
4799 | == sizeof (Elf_External_Rela))); | |
252b5132 RH |
4800 | |
4801 | /* Adjust the reloc addresses and symbol indices. */ | |
4802 | ||
4803 | irela = internal_relocs; | |
dc810e39 | 4804 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 4805 | rel_hash = (elf_section_data (o->output_section)->rel_hashes |
31367b81 MM |
4806 | + elf_section_data (o->output_section)->rel_count |
4807 | + elf_section_data (o->output_section)->rel_count2); | |
73722af0 | 4808 | last_offset = o->output_offset; |
1049f94e | 4809 | if (!finfo->info->relocatable) |
73722af0 | 4810 | last_offset += o->output_section->vma; |
209f668e | 4811 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) |
252b5132 RH |
4812 | { |
4813 | unsigned long r_symndx; | |
252b5132 | 4814 | asection *sec; |
fad2542d | 4815 | Elf_Internal_Sym sym; |
252b5132 | 4816 | |
209f668e NC |
4817 | if (next_erel == bed->s->int_rels_per_ext_rel) |
4818 | { | |
4819 | rel_hash++; | |
4820 | next_erel = 0; | |
4821 | } | |
4822 | ||
d6fe2dc1 AM |
4823 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
4824 | finfo->info, o, | |
4825 | irela->r_offset); | |
4826 | if (irela->r_offset >= (bfd_vma) -2) | |
4827 | { | |
73722af0 AM |
4828 | /* This is a reloc for a deleted entry or somesuch. |
4829 | Turn it into an R_*_NONE reloc, at the same | |
4830 | offset as the last reloc. elf_eh_frame.c and | |
4831 | elf_bfd_discard_info rely on reloc offsets | |
b34976b6 | 4832 | being ordered. */ |
73722af0 AM |
4833 | irela->r_offset = last_offset; |
4834 | irela->r_info = 0; | |
4835 | irela->r_addend = 0; | |
d6fe2dc1 AM |
4836 | continue; |
4837 | } | |
4838 | ||
252b5132 RH |
4839 | irela->r_offset += o->output_offset; |
4840 | ||
7ad34365 | 4841 | /* Relocs in an executable have to be virtual addresses. */ |
1049f94e | 4842 | if (!finfo->info->relocatable) |
7ad34365 NC |
4843 | irela->r_offset += o->output_section->vma; |
4844 | ||
73722af0 | 4845 | last_offset = irela->r_offset; |
252b5132 | 4846 | |
73722af0 AM |
4847 | r_symndx = ELF_R_SYM (irela->r_info); |
4848 | if (r_symndx == STN_UNDEF) | |
252b5132 RH |
4849 | continue; |
4850 | ||
4851 | if (r_symndx >= locsymcount | |
4852 | || (elf_bad_symtab (input_bfd) | |
4853 | && finfo->sections[r_symndx] == NULL)) | |
4854 | { | |
4855 | struct elf_link_hash_entry *rh; | |
209f668e | 4856 | unsigned long indx; |
252b5132 RH |
4857 | |
4858 | /* This is a reloc against a global symbol. We | |
4859 | have not yet output all the local symbols, so | |
4860 | we do not know the symbol index of any global | |
4861 | symbol. We set the rel_hash entry for this | |
4862 | reloc to point to the global hash table entry | |
4863 | for this symbol. The symbol index is then | |
4864 | set at the end of elf_bfd_final_link. */ | |
4865 | indx = r_symndx - extsymoff; | |
4866 | rh = elf_sym_hashes (input_bfd)[indx]; | |
4867 | while (rh->root.type == bfd_link_hash_indirect | |
4868 | || rh->root.type == bfd_link_hash_warning) | |
4869 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
4870 | ||
4871 | /* Setting the index to -2 tells | |
4872 | elf_link_output_extsym that this symbol is | |
4873 | used by a reloc. */ | |
4874 | BFD_ASSERT (rh->indx < 0); | |
4875 | rh->indx = -2; | |
4876 | ||
4877 | *rel_hash = rh; | |
4878 | ||
4879 | continue; | |
4880 | } | |
4881 | ||
3e932841 | 4882 | /* This is a reloc against a local symbol. */ |
252b5132 RH |
4883 | |
4884 | *rel_hash = NULL; | |
fad2542d | 4885 | sym = isymbuf[r_symndx]; |
252b5132 | 4886 | sec = finfo->sections[r_symndx]; |
fad2542d | 4887 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
252b5132 RH |
4888 | { |
4889 | /* I suppose the backend ought to fill in the | |
4890 | section of any STT_SECTION symbol against a | |
4891 | processor specific section. If we have | |
4892 | discarded a section, the output_section will | |
4893 | be the absolute section. */ | |
b491616a AM |
4894 | if (bfd_is_abs_section (sec) |
4895 | || (sec != NULL | |
4896 | && bfd_is_abs_section (sec->output_section))) | |
252b5132 RH |
4897 | r_symndx = 0; |
4898 | else if (sec == NULL || sec->owner == NULL) | |
4899 | { | |
4900 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 4901 | return FALSE; |
252b5132 RH |
4902 | } |
4903 | else | |
4904 | { | |
4905 | r_symndx = sec->output_section->target_index; | |
4906 | BFD_ASSERT (r_symndx != 0); | |
4907 | } | |
b491616a AM |
4908 | |
4909 | /* Adjust the addend according to where the | |
f5d44ba0 | 4910 | section winds up in the output section. */ |
b491616a AM |
4911 | if (rela_normal) |
4912 | irela->r_addend += sec->output_offset; | |
252b5132 RH |
4913 | } |
4914 | else | |
4915 | { | |
4916 | if (finfo->indices[r_symndx] == -1) | |
4917 | { | |
dc810e39 | 4918 | unsigned long shlink; |
252b5132 RH |
4919 | const char *name; |
4920 | asection *osec; | |
4921 | ||
4922 | if (finfo->info->strip == strip_all) | |
4923 | { | |
4924 | /* You can't do ld -r -s. */ | |
4925 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 4926 | return FALSE; |
252b5132 RH |
4927 | } |
4928 | ||
4929 | /* This symbol was skipped earlier, but | |
4930 | since it is needed by a reloc, we | |
4931 | must output it now. */ | |
dc810e39 | 4932 | shlink = symtab_hdr->sh_link; |
a7b97311 | 4933 | name = (bfd_elf_string_from_elf_section |
fad2542d | 4934 | (input_bfd, shlink, sym.st_name)); |
252b5132 | 4935 | if (name == NULL) |
b34976b6 | 4936 | return FALSE; |
252b5132 RH |
4937 | |
4938 | osec = sec->output_section; | |
fad2542d | 4939 | sym.st_shndx = |
252b5132 RH |
4940 | _bfd_elf_section_from_bfd_section (output_bfd, |
4941 | osec); | |
fad2542d | 4942 | if (sym.st_shndx == SHN_BAD) |
b34976b6 | 4943 | return FALSE; |
252b5132 | 4944 | |
fad2542d | 4945 | sym.st_value += sec->output_offset; |
1049f94e | 4946 | if (! finfo->info->relocatable) |
13ae64f3 | 4947 | { |
fad2542d AM |
4948 | sym.st_value += osec->vma; |
4949 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
13ae64f3 JJ |
4950 | { |
4951 | /* STT_TLS symbols are relative to PT_TLS | |
4952 | segment base. */ | |
e1918d23 AM |
4953 | BFD_ASSERT (elf_hash_table (finfo->info) |
4954 | ->tls_sec != NULL); | |
4955 | sym.st_value -= (elf_hash_table (finfo->info) | |
4956 | ->tls_sec->vma); | |
13ae64f3 JJ |
4957 | } |
4958 | } | |
252b5132 | 4959 | |
a7b97311 AM |
4960 | finfo->indices[r_symndx] |
4961 | = bfd_get_symcount (output_bfd); | |
252b5132 | 4962 | |
754021d0 AM |
4963 | if (! elf_link_output_sym (finfo, name, &sym, sec, |
4964 | NULL)) | |
b34976b6 | 4965 | return FALSE; |
252b5132 RH |
4966 | } |
4967 | ||
4968 | r_symndx = finfo->indices[r_symndx]; | |
4969 | } | |
4970 | ||
4971 | irela->r_info = ELF_R_INFO (r_symndx, | |
4972 | ELF_R_TYPE (irela->r_info)); | |
4973 | } | |
4974 | ||
4975 | /* Swap out the relocs. */ | |
c44233aa | 4976 | if (bed->elf_backend_emit_relocs |
1049f94e | 4977 | && !(finfo->info->relocatable |
a7b97311 | 4978 | || finfo->info->emitrelocations)) |
c44233aa AM |
4979 | reloc_emitter = bed->elf_backend_emit_relocs; |
4980 | else | |
45d6a902 | 4981 | reloc_emitter = _bfd_elf_link_output_relocs; |
9317eacc | 4982 | |
c89583f8 AM |
4983 | if (input_rel_hdr->sh_size != 0 |
4984 | && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr, | |
4985 | internal_relocs)) | |
b34976b6 | 4986 | return FALSE; |
9317eacc | 4987 | |
c89583f8 AM |
4988 | input_rel_hdr2 = elf_section_data (o)->rel_hdr2; |
4989 | if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0) | |
c44233aa AM |
4990 | { |
4991 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) | |
dc810e39 | 4992 | * bed->s->int_rels_per_ext_rel); |
c89583f8 | 4993 | if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2, |
41241523 | 4994 | internal_relocs)) |
b34976b6 | 4995 | return FALSE; |
c44233aa | 4996 | } |
252b5132 RH |
4997 | } |
4998 | } | |
4999 | ||
5000 | /* Write out the modified section contents. */ | |
73d074b4 | 5001 | if (bed->elf_backend_write_section |
f9f32305 | 5002 | && (*bed->elf_backend_write_section) (output_bfd, o, contents)) |
73d074b4 DJ |
5003 | { |
5004 | /* Section written out. */ | |
5005 | } | |
68bfbfcc | 5006 | else switch (o->sec_info_type) |
f5fa8ca2 | 5007 | { |
65765700 | 5008 | case ELF_INFO_TYPE_STABS: |
f5fa8ca2 | 5009 | if (! (_bfd_write_section_stabs |
65765700 JJ |
5010 | (output_bfd, |
5011 | &elf_hash_table (finfo->info)->stab_info, | |
5012 | o, &elf_section_data (o)->sec_info, contents))) | |
b34976b6 | 5013 | return FALSE; |
65765700 JJ |
5014 | break; |
5015 | case ELF_INFO_TYPE_MERGE: | |
126495ed AM |
5016 | if (! _bfd_write_merged_section (output_bfd, o, |
5017 | elf_section_data (o)->sec_info)) | |
b34976b6 | 5018 | return FALSE; |
65765700 JJ |
5019 | break; |
5020 | case ELF_INFO_TYPE_EH_FRAME: | |
5021 | { | |
126495ed AM |
5022 | if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info, |
5023 | o, contents)) | |
b34976b6 | 5024 | return FALSE; |
65765700 JJ |
5025 | } |
5026 | break; | |
5027 | default: | |
5028 | { | |
5029 | bfd_size_type sec_size; | |
5030 | ||
5031 | sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size); | |
5032 | if (! (o->flags & SEC_EXCLUDE) | |
5033 | && ! bfd_set_section_contents (output_bfd, o->output_section, | |
5034 | contents, | |
5035 | (file_ptr) o->output_offset, | |
5036 | sec_size)) | |
b34976b6 | 5037 | return FALSE; |
65765700 JJ |
5038 | } |
5039 | break; | |
252b5132 RH |
5040 | } |
5041 | } | |
5042 | ||
b34976b6 | 5043 | return TRUE; |
252b5132 RH |
5044 | } |
5045 | ||
5046 | /* Generate a reloc when linking an ELF file. This is a reloc | |
5047 | requested by the linker, and does come from any input file. This | |
5048 | is used to build constructor and destructor tables when linking | |
5049 | with -Ur. */ | |
5050 | ||
b34976b6 | 5051 | static bfd_boolean |
268b6b39 AM |
5052 | elf_reloc_link_order (bfd *output_bfd, |
5053 | struct bfd_link_info *info, | |
5054 | asection *output_section, | |
5055 | struct bfd_link_order *link_order) | |
252b5132 RH |
5056 | { |
5057 | reloc_howto_type *howto; | |
5058 | long indx; | |
5059 | bfd_vma offset; | |
5060 | bfd_vma addend; | |
5061 | struct elf_link_hash_entry **rel_hash_ptr; | |
5062 | Elf_Internal_Shdr *rel_hdr; | |
9c5bfbb7 | 5063 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
947216bf AM |
5064 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; |
5065 | bfd_byte *erel; | |
5066 | unsigned int i; | |
252b5132 RH |
5067 | |
5068 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
5069 | if (howto == NULL) | |
5070 | { | |
5071 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 5072 | return FALSE; |
252b5132 RH |
5073 | } |
5074 | ||
5075 | addend = link_order->u.reloc.p->addend; | |
5076 | ||
5077 | /* Figure out the symbol index. */ | |
5078 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
31367b81 MM |
5079 | + elf_section_data (output_section)->rel_count |
5080 | + elf_section_data (output_section)->rel_count2); | |
252b5132 RH |
5081 | if (link_order->type == bfd_section_reloc_link_order) |
5082 | { | |
5083 | indx = link_order->u.reloc.p->u.section->target_index; | |
5084 | BFD_ASSERT (indx != 0); | |
5085 | *rel_hash_ptr = NULL; | |
5086 | } | |
5087 | else | |
5088 | { | |
5089 | struct elf_link_hash_entry *h; | |
5090 | ||
5091 | /* Treat a reloc against a defined symbol as though it were | |
c44233aa | 5092 | actually against the section. */ |
252b5132 RH |
5093 | h = ((struct elf_link_hash_entry *) |
5094 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
5095 | link_order->u.reloc.p->u.name, | |
b34976b6 | 5096 | FALSE, FALSE, TRUE)); |
252b5132 RH |
5097 | if (h != NULL |
5098 | && (h->root.type == bfd_link_hash_defined | |
5099 | || h->root.type == bfd_link_hash_defweak)) | |
5100 | { | |
5101 | asection *section; | |
5102 | ||
5103 | section = h->root.u.def.section; | |
5104 | indx = section->output_section->target_index; | |
5105 | *rel_hash_ptr = NULL; | |
5106 | /* It seems that we ought to add the symbol value to the | |
c44233aa AM |
5107 | addend here, but in practice it has already been added |
5108 | because it was passed to constructor_callback. */ | |
252b5132 RH |
5109 | addend += section->output_section->vma + section->output_offset; |
5110 | } | |
5111 | else if (h != NULL) | |
5112 | { | |
5113 | /* Setting the index to -2 tells elf_link_output_extsym that | |
5114 | this symbol is used by a reloc. */ | |
5115 | h->indx = -2; | |
5116 | *rel_hash_ptr = h; | |
5117 | indx = 0; | |
5118 | } | |
5119 | else | |
5120 | { | |
5121 | if (! ((*info->callbacks->unattached_reloc) | |
268b6b39 | 5122 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) |
b34976b6 | 5123 | return FALSE; |
252b5132 RH |
5124 | indx = 0; |
5125 | } | |
5126 | } | |
5127 | ||
5128 | /* If this is an inplace reloc, we must write the addend into the | |
5129 | object file. */ | |
5130 | if (howto->partial_inplace && addend != 0) | |
5131 | { | |
5132 | bfd_size_type size; | |
5133 | bfd_reloc_status_type rstat; | |
5134 | bfd_byte *buf; | |
b34976b6 | 5135 | bfd_boolean ok; |
dc810e39 | 5136 | const char *sym_name; |
252b5132 RH |
5137 | |
5138 | size = bfd_get_reloc_size (howto); | |
268b6b39 AM |
5139 | buf = bfd_zmalloc (size); |
5140 | if (buf == NULL) | |
b34976b6 | 5141 | return FALSE; |
268b6b39 | 5142 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); |
252b5132 RH |
5143 | switch (rstat) |
5144 | { | |
5145 | case bfd_reloc_ok: | |
5146 | break; | |
dc810e39 | 5147 | |
252b5132 RH |
5148 | default: |
5149 | case bfd_reloc_outofrange: | |
5150 | abort (); | |
dc810e39 | 5151 | |
252b5132 | 5152 | case bfd_reloc_overflow: |
dc810e39 AM |
5153 | if (link_order->type == bfd_section_reloc_link_order) |
5154 | sym_name = bfd_section_name (output_bfd, | |
5155 | link_order->u.reloc.p->u.section); | |
5156 | else | |
5157 | sym_name = link_order->u.reloc.p->u.name; | |
252b5132 | 5158 | if (! ((*info->callbacks->reloc_overflow) |
268b6b39 | 5159 | (info, sym_name, howto->name, addend, NULL, NULL, 0))) |
252b5132 RH |
5160 | { |
5161 | free (buf); | |
b34976b6 | 5162 | return FALSE; |
252b5132 RH |
5163 | } |
5164 | break; | |
5165 | } | |
268b6b39 AM |
5166 | ok = bfd_set_section_contents (output_bfd, output_section, buf, |
5167 | link_order->offset, size); | |
252b5132 RH |
5168 | free (buf); |
5169 | if (! ok) | |
b34976b6 | 5170 | return FALSE; |
252b5132 RH |
5171 | } |
5172 | ||
5173 | /* The address of a reloc is relative to the section in a | |
1049f94e | 5174 | relocatable file, and is a virtual address in an executable |
252b5132 RH |
5175 | file. */ |
5176 | offset = link_order->offset; | |
1049f94e | 5177 | if (! info->relocatable) |
252b5132 RH |
5178 | offset += output_section->vma; |
5179 | ||
947216bf AM |
5180 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
5181 | { | |
5182 | irel[i].r_offset = offset; | |
5183 | irel[i].r_info = 0; | |
5184 | irel[i].r_addend = 0; | |
5185 | } | |
5186 | irel[0].r_info = ELF_R_INFO (indx, howto->type); | |
252b5132 | 5187 | |
947216bf AM |
5188 | rel_hdr = &elf_section_data (output_section)->rel_hdr; |
5189 | erel = rel_hdr->contents; | |
252b5132 RH |
5190 | if (rel_hdr->sh_type == SHT_REL) |
5191 | { | |
947216bf AM |
5192 | erel += (elf_section_data (output_section)->rel_count |
5193 | * sizeof (Elf_External_Rel)); | |
5194 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); | |
252b5132 RH |
5195 | } |
5196 | else | |
5197 | { | |
947216bf AM |
5198 | irel[0].r_addend = addend; |
5199 | erel += (elf_section_data (output_section)->rel_count | |
5200 | * sizeof (Elf_External_Rela)); | |
5201 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); | |
252b5132 RH |
5202 | } |
5203 | ||
0525d26e | 5204 | ++elf_section_data (output_section)->rel_count; |
252b5132 | 5205 | |
b34976b6 | 5206 | return TRUE; |
252b5132 | 5207 | } |
252b5132 | 5208 | \f |
252b5132 RH |
5209 | /* Garbage collect unused sections. */ |
5210 | ||
b34976b6 | 5211 | static bfd_boolean elf_gc_sweep_symbol |
268b6b39 | 5212 | (struct elf_link_hash_entry *, void *); |
252b5132 | 5213 | |
b34976b6 | 5214 | static bfd_boolean elf_gc_allocate_got_offsets |
268b6b39 | 5215 | (struct elf_link_hash_entry *, void *); |
252b5132 RH |
5216 | |
5217 | /* The mark phase of garbage collection. For a given section, mark | |
dbb410c3 AM |
5218 | it and any sections in this section's group, and all the sections |
5219 | which define symbols to which it refers. */ | |
252b5132 | 5220 | |
b34976b6 | 5221 | typedef asection * (*gc_mark_hook_fn) |
268b6b39 AM |
5222 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
5223 | struct elf_link_hash_entry *, Elf_Internal_Sym *); | |
b34976b6 AM |
5224 | |
5225 | static bfd_boolean | |
268b6b39 AM |
5226 | elf_gc_mark (struct bfd_link_info *info, |
5227 | asection *sec, | |
5228 | gc_mark_hook_fn gc_mark_hook) | |
252b5132 | 5229 | { |
b34976b6 | 5230 | bfd_boolean ret; |
dbb410c3 | 5231 | asection *group_sec; |
252b5132 RH |
5232 | |
5233 | sec->gc_mark = 1; | |
5234 | ||
dbb410c3 AM |
5235 | /* Mark all the sections in the group. */ |
5236 | group_sec = elf_section_data (sec)->next_in_group; | |
5237 | if (group_sec && !group_sec->gc_mark) | |
5238 | if (!elf_gc_mark (info, group_sec, gc_mark_hook)) | |
b34976b6 | 5239 | return FALSE; |
252b5132 | 5240 | |
dbb410c3 | 5241 | /* Look through the section relocs. */ |
b34976b6 | 5242 | ret = TRUE; |
252b5132 RH |
5243 | if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0) |
5244 | { | |
5245 | Elf_Internal_Rela *relstart, *rel, *relend; | |
5246 | Elf_Internal_Shdr *symtab_hdr; | |
5247 | struct elf_link_hash_entry **sym_hashes; | |
5248 | size_t nlocsyms; | |
5249 | size_t extsymoff; | |
252b5132 | 5250 | bfd *input_bfd = sec->owner; |
9c5bfbb7 | 5251 | const struct elf_backend_data *bed = get_elf_backend_data (input_bfd); |
6cdc0ccc | 5252 | Elf_Internal_Sym *isym = NULL; |
252b5132 RH |
5253 | |
5254 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
5255 | sym_hashes = elf_sym_hashes (input_bfd); | |
5256 | ||
5257 | /* Read the local symbols. */ | |
5258 | if (elf_bad_symtab (input_bfd)) | |
5259 | { | |
5260 | nlocsyms = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
c44233aa | 5261 | extsymoff = 0; |
252b5132 RH |
5262 | } |
5263 | else | |
5264 | extsymoff = nlocsyms = symtab_hdr->sh_info; | |
9ad5cbcf | 5265 | |
6cdc0ccc AM |
5266 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
5267 | if (isym == NULL && nlocsyms != 0) | |
9ad5cbcf | 5268 | { |
6cdc0ccc AM |
5269 | isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0, |
5270 | NULL, NULL, NULL); | |
5271 | if (isym == NULL) | |
b34976b6 | 5272 | return FALSE; |
9ad5cbcf AM |
5273 | } |
5274 | ||
252b5132 | 5275 | /* Read the relocations. */ |
268b6b39 | 5276 | relstart = _bfd_elf_link_read_relocs (input_bfd, sec, NULL, NULL, |
45d6a902 | 5277 | info->keep_memory); |
252b5132 RH |
5278 | if (relstart == NULL) |
5279 | { | |
b34976b6 | 5280 | ret = FALSE; |
252b5132 RH |
5281 | goto out1; |
5282 | } | |
c7ac6ff8 | 5283 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
5284 | |
5285 | for (rel = relstart; rel < relend; rel++) | |
5286 | { | |
5287 | unsigned long r_symndx; | |
5288 | asection *rsec; | |
5289 | struct elf_link_hash_entry *h; | |
252b5132 RH |
5290 | |
5291 | r_symndx = ELF_R_SYM (rel->r_info); | |
5292 | if (r_symndx == 0) | |
5293 | continue; | |
5294 | ||
6cdc0ccc AM |
5295 | if (r_symndx >= nlocsyms |
5296 | || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL) | |
252b5132 RH |
5297 | { |
5298 | h = sym_hashes[r_symndx - extsymoff]; | |
1e2f5b6e | 5299 | rsec = (*gc_mark_hook) (sec, info, rel, h, NULL); |
252b5132 RH |
5300 | } |
5301 | else | |
5302 | { | |
6cdc0ccc | 5303 | rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]); |
252b5132 RH |
5304 | } |
5305 | ||
5306 | if (rsec && !rsec->gc_mark) | |
b91afed7 AM |
5307 | { |
5308 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
5309 | rsec->gc_mark = 1; | |
5310 | else if (!elf_gc_mark (info, rsec, gc_mark_hook)) | |
5311 | { | |
b34976b6 | 5312 | ret = FALSE; |
b91afed7 AM |
5313 | goto out2; |
5314 | } | |
5315 | } | |
252b5132 RH |
5316 | } |
5317 | ||
5318 | out2: | |
6cdc0ccc | 5319 | if (elf_section_data (sec)->relocs != relstart) |
252b5132 RH |
5320 | free (relstart); |
5321 | out1: | |
6cdc0ccc AM |
5322 | if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym) |
5323 | { | |
5324 | if (! info->keep_memory) | |
5325 | free (isym); | |
5326 | else | |
5327 | symtab_hdr->contents = (unsigned char *) isym; | |
5328 | } | |
252b5132 RH |
5329 | } |
5330 | ||
5331 | return ret; | |
5332 | } | |
5333 | ||
5334 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
5335 | ||
b34976b6 | 5336 | typedef bfd_boolean (*gc_sweep_hook_fn) |
268b6b39 | 5337 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
b34976b6 AM |
5338 | |
5339 | static bfd_boolean | |
268b6b39 | 5340 | elf_gc_sweep (struct bfd_link_info *info, gc_sweep_hook_fn gc_sweep_hook) |
252b5132 RH |
5341 | { |
5342 | bfd *sub; | |
5343 | ||
5344 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
5345 | { | |
5346 | asection *o; | |
5347 | ||
f6af82bd AM |
5348 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) |
5349 | continue; | |
5350 | ||
252b5132 RH |
5351 | for (o = sub->sections; o != NULL; o = o->next) |
5352 | { | |
5353 | /* Keep special sections. Keep .debug sections. */ | |
5354 | if ((o->flags & SEC_LINKER_CREATED) | |
5355 | || (o->flags & SEC_DEBUGGING)) | |
5356 | o->gc_mark = 1; | |
5357 | ||
5358 | if (o->gc_mark) | |
5359 | continue; | |
5360 | ||
5361 | /* Skip sweeping sections already excluded. */ | |
5362 | if (o->flags & SEC_EXCLUDE) | |
5363 | continue; | |
5364 | ||
5365 | /* Since this is early in the link process, it is simple | |
5366 | to remove a section from the output. */ | |
5367 | o->flags |= SEC_EXCLUDE; | |
5368 | ||
5369 | /* But we also have to update some of the relocation | |
5370 | info we collected before. */ | |
5371 | if (gc_sweep_hook | |
5372 | && (o->flags & SEC_RELOC) && o->reloc_count > 0) | |
5373 | { | |
5374 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 5375 | bfd_boolean r; |
252b5132 | 5376 | |
45d6a902 | 5377 | internal_relocs |
268b6b39 | 5378 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, |
45d6a902 | 5379 | info->keep_memory); |
252b5132 | 5380 | if (internal_relocs == NULL) |
b34976b6 | 5381 | return FALSE; |
252b5132 | 5382 | |
3e932841 | 5383 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
252b5132 | 5384 | |
6cdc0ccc | 5385 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
5386 | free (internal_relocs); |
5387 | ||
5388 | if (!r) | |
b34976b6 | 5389 | return FALSE; |
252b5132 RH |
5390 | } |
5391 | } | |
5392 | } | |
5393 | ||
5394 | /* Remove the symbols that were in the swept sections from the dynamic | |
5395 | symbol table. GCFIXME: Anyone know how to get them out of the | |
5396 | static symbol table as well? */ | |
5397 | { | |
5398 | int i = 0; | |
5399 | ||
268b6b39 | 5400 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, &i); |
252b5132 RH |
5401 | |
5402 | elf_hash_table (info)->dynsymcount = i; | |
5403 | } | |
5404 | ||
b34976b6 | 5405 | return TRUE; |
252b5132 RH |
5406 | } |
5407 | ||
5408 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
5409 | ||
b34976b6 | 5410 | static bfd_boolean |
268b6b39 | 5411 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *idxptr) |
252b5132 | 5412 | { |
268b6b39 | 5413 | int *idx = idxptr; |
252b5132 | 5414 | |
e92d460e AM |
5415 | if (h->root.type == bfd_link_hash_warning) |
5416 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5417 | ||
252b5132 RH |
5418 | if (h->dynindx != -1 |
5419 | && ((h->root.type != bfd_link_hash_defined | |
5420 | && h->root.type != bfd_link_hash_defweak) | |
5421 | || h->root.u.def.section->gc_mark)) | |
5422 | h->dynindx = (*idx)++; | |
5423 | ||
b34976b6 | 5424 | return TRUE; |
252b5132 RH |
5425 | } |
5426 | ||
4cc11e76 | 5427 | /* Propagate collected vtable information. This is called through |
252b5132 RH |
5428 | elf_link_hash_traverse. */ |
5429 | ||
b34976b6 | 5430 | static bfd_boolean |
268b6b39 | 5431 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) |
252b5132 | 5432 | { |
e92d460e AM |
5433 | if (h->root.type == bfd_link_hash_warning) |
5434 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5435 | ||
3e932841 | 5436 | /* Those that are not vtables. */ |
252b5132 | 5437 | if (h->vtable_parent == NULL) |
b34976b6 | 5438 | return TRUE; |
252b5132 RH |
5439 | |
5440 | /* Those vtables that do not have parents, we cannot merge. */ | |
5441 | if (h->vtable_parent == (struct elf_link_hash_entry *) -1) | |
b34976b6 | 5442 | return TRUE; |
252b5132 RH |
5443 | |
5444 | /* If we've already been done, exit. */ | |
5445 | if (h->vtable_entries_used && h->vtable_entries_used[-1]) | |
b34976b6 | 5446 | return TRUE; |
252b5132 RH |
5447 | |
5448 | /* Make sure the parent's table is up to date. */ | |
5449 | elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp); | |
5450 | ||
5451 | if (h->vtable_entries_used == NULL) | |
5452 | { | |
5453 | /* None of this table's entries were referenced. Re-use the | |
5454 | parent's table. */ | |
5455 | h->vtable_entries_used = h->vtable_parent->vtable_entries_used; | |
5456 | h->vtable_entries_size = h->vtable_parent->vtable_entries_size; | |
5457 | } | |
5458 | else | |
5459 | { | |
5460 | size_t n; | |
b34976b6 | 5461 | bfd_boolean *cu, *pu; |
252b5132 RH |
5462 | |
5463 | /* Or the parent's entries into ours. */ | |
5464 | cu = h->vtable_entries_used; | |
b34976b6 | 5465 | cu[-1] = TRUE; |
252b5132 RH |
5466 | pu = h->vtable_parent->vtable_entries_used; |
5467 | if (pu != NULL) | |
5468 | { | |
9c5bfbb7 AM |
5469 | const struct elf_backend_data *bed; |
5470 | unsigned int log_file_align; | |
0d1ea5c0 | 5471 | |
9c5bfbb7 AM |
5472 | bed = get_elf_backend_data (h->root.u.def.section->owner); |
5473 | log_file_align = bed->s->log_file_align; | |
45d6a902 | 5474 | n = h->vtable_parent->vtable_entries_size >> log_file_align; |
374b596d | 5475 | while (n--) |
252b5132 | 5476 | { |
374b596d | 5477 | if (*pu) |
b34976b6 | 5478 | *cu = TRUE; |
374b596d NC |
5479 | pu++; |
5480 | cu++; | |
252b5132 RH |
5481 | } |
5482 | } | |
5483 | } | |
5484 | ||
b34976b6 | 5485 | return TRUE; |
252b5132 RH |
5486 | } |
5487 | ||
b34976b6 | 5488 | static bfd_boolean |
268b6b39 | 5489 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) |
252b5132 RH |
5490 | { |
5491 | asection *sec; | |
5492 | bfd_vma hstart, hend; | |
5493 | Elf_Internal_Rela *relstart, *relend, *rel; | |
9c5bfbb7 | 5494 | const struct elf_backend_data *bed; |
45d6a902 | 5495 | unsigned int log_file_align; |
252b5132 | 5496 | |
e92d460e AM |
5497 | if (h->root.type == bfd_link_hash_warning) |
5498 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5499 | ||
252b5132 RH |
5500 | /* Take care of both those symbols that do not describe vtables as |
5501 | well as those that are not loaded. */ | |
5502 | if (h->vtable_parent == NULL) | |
b34976b6 | 5503 | return TRUE; |
252b5132 RH |
5504 | |
5505 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
5506 | || h->root.type == bfd_link_hash_defweak); | |
5507 | ||
5508 | sec = h->root.u.def.section; | |
5509 | hstart = h->root.u.def.value; | |
5510 | hend = hstart + h->size; | |
5511 | ||
268b6b39 | 5512 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); |
252b5132 | 5513 | if (!relstart) |
b34976b6 | 5514 | return *(bfd_boolean *) okp = FALSE; |
c7ac6ff8 | 5515 | bed = get_elf_backend_data (sec->owner); |
45d6a902 | 5516 | log_file_align = bed->s->log_file_align; |
0d1ea5c0 | 5517 | |
c7ac6ff8 | 5518 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
5519 | |
5520 | for (rel = relstart; rel < relend; ++rel) | |
5521 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
5522 | { | |
5523 | /* If the entry is in use, do nothing. */ | |
5524 | if (h->vtable_entries_used | |
5525 | && (rel->r_offset - hstart) < h->vtable_entries_size) | |
5526 | { | |
45d6a902 | 5527 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; |
252b5132 RH |
5528 | if (h->vtable_entries_used[entry]) |
5529 | continue; | |
5530 | } | |
5531 | /* Otherwise, kill it. */ | |
5532 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
5533 | } | |
5534 | ||
b34976b6 | 5535 | return TRUE; |
252b5132 RH |
5536 | } |
5537 | ||
5538 | /* Do mark and sweep of unused sections. */ | |
5539 | ||
b34976b6 | 5540 | bfd_boolean |
268b6b39 | 5541 | elf_gc_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 5542 | { |
b34976b6 | 5543 | bfd_boolean ok = TRUE; |
252b5132 RH |
5544 | bfd *sub; |
5545 | asection * (*gc_mark_hook) | |
268b6b39 AM |
5546 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
5547 | struct elf_link_hash_entry *h, Elf_Internal_Sym *); | |
252b5132 RH |
5548 | |
5549 | if (!get_elf_backend_data (abfd)->can_gc_sections | |
0eddce27 AM |
5550 | || info->relocatable |
5551 | || info->emitrelocations | |
5552 | || !is_elf_hash_table (info->hash) | |
252b5132 | 5553 | || elf_hash_table (info)->dynamic_sections_created) |
2627de83 AM |
5554 | { |
5555 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
5556 | return TRUE; | |
5557 | } | |
252b5132 RH |
5558 | |
5559 | /* Apply transitive closure to the vtable entry usage info. */ | |
5560 | elf_link_hash_traverse (elf_hash_table (info), | |
5561 | elf_gc_propagate_vtable_entries_used, | |
268b6b39 | 5562 | &ok); |
252b5132 | 5563 | if (!ok) |
b34976b6 | 5564 | return FALSE; |
252b5132 RH |
5565 | |
5566 | /* Kill the vtable relocations that were not used. */ | |
5567 | elf_link_hash_traverse (elf_hash_table (info), | |
5568 | elf_gc_smash_unused_vtentry_relocs, | |
268b6b39 | 5569 | &ok); |
252b5132 | 5570 | if (!ok) |
b34976b6 | 5571 | return FALSE; |
252b5132 RH |
5572 | |
5573 | /* Grovel through relocs to find out who stays ... */ | |
5574 | ||
5575 | gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook; | |
5576 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
5577 | { | |
5578 | asection *o; | |
f6af82bd AM |
5579 | |
5580 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
5581 | continue; | |
5582 | ||
252b5132 RH |
5583 | for (o = sub->sections; o != NULL; o = o->next) |
5584 | { | |
5585 | if (o->flags & SEC_KEEP) | |
c44233aa | 5586 | if (!elf_gc_mark (info, o, gc_mark_hook)) |
b34976b6 | 5587 | return FALSE; |
252b5132 RH |
5588 | } |
5589 | } | |
5590 | ||
5591 | /* ... and mark SEC_EXCLUDE for those that go. */ | |
a7b97311 | 5592 | if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook)) |
b34976b6 | 5593 | return FALSE; |
252b5132 | 5594 | |
b34976b6 | 5595 | return TRUE; |
252b5132 RH |
5596 | } |
5597 | \f | |
4cc11e76 | 5598 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ |
252b5132 | 5599 | |
b34976b6 | 5600 | bfd_boolean |
268b6b39 AM |
5601 | elf_gc_record_vtinherit (bfd *abfd, |
5602 | asection *sec, | |
5603 | struct elf_link_hash_entry *h, | |
5604 | bfd_vma offset) | |
252b5132 RH |
5605 | { |
5606 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
5607 | struct elf_link_hash_entry **search, *child; | |
5608 | bfd_size_type extsymcount; | |
5609 | ||
5610 | /* The sh_info field of the symtab header tells us where the | |
5611 | external symbols start. We don't care about the local symbols at | |
5612 | this point. */ | |
5613 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size/sizeof (Elf_External_Sym); | |
5614 | if (!elf_bad_symtab (abfd)) | |
5615 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
5616 | ||
5617 | sym_hashes = elf_sym_hashes (abfd); | |
5618 | sym_hashes_end = sym_hashes + extsymcount; | |
5619 | ||
5620 | /* Hunt down the child symbol, which is in this section at the same | |
5621 | offset as the relocation. */ | |
5622 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
5623 | { | |
5624 | if ((child = *search) != NULL | |
5625 | && (child->root.type == bfd_link_hash_defined | |
5626 | || child->root.type == bfd_link_hash_defweak) | |
5627 | && child->root.u.def.section == sec | |
5628 | && child->root.u.def.value == offset) | |
5629 | goto win; | |
5630 | } | |
5631 | ||
5632 | (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT", | |
8f615d07 | 5633 | bfd_archive_filename (abfd), sec->name, |
a7b97311 | 5634 | (unsigned long) offset); |
252b5132 | 5635 | bfd_set_error (bfd_error_invalid_operation); |
b34976b6 | 5636 | return FALSE; |
252b5132 | 5637 | |
dc810e39 | 5638 | win: |
252b5132 RH |
5639 | if (!h) |
5640 | { | |
5641 | /* This *should* only be the absolute section. It could potentially | |
5642 | be that someone has defined a non-global vtable though, which | |
5643 | would be bad. It isn't worth paging in the local symbols to be | |
5644 | sure though; that case should simply be handled by the assembler. */ | |
5645 | ||
5646 | child->vtable_parent = (struct elf_link_hash_entry *) -1; | |
5647 | } | |
5648 | else | |
5649 | child->vtable_parent = h; | |
5650 | ||
b34976b6 | 5651 | return TRUE; |
252b5132 RH |
5652 | } |
5653 | ||
4cc11e76 | 5654 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ |
252b5132 | 5655 | |
b34976b6 | 5656 | bfd_boolean |
268b6b39 AM |
5657 | elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, |
5658 | asection *sec ATTRIBUTE_UNUSED, | |
5659 | struct elf_link_hash_entry *h, | |
5660 | bfd_vma addend) | |
252b5132 | 5661 | { |
9c5bfbb7 | 5662 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
45d6a902 | 5663 | unsigned int log_file_align = bed->s->log_file_align; |
0d1ea5c0 | 5664 | |
64c456e1 | 5665 | if (addend >= h->vtable_entries_size) |
252b5132 | 5666 | { |
64c456e1 | 5667 | size_t size, bytes, file_align; |
b34976b6 | 5668 | bfd_boolean *ptr = h->vtable_entries_used; |
252b5132 RH |
5669 | |
5670 | /* While the symbol is undefined, we have to be prepared to handle | |
5671 | a zero size. */ | |
64c456e1 | 5672 | file_align = 1 << log_file_align; |
252b5132 | 5673 | if (h->root.type == bfd_link_hash_undefined) |
64c456e1 | 5674 | size = addend + file_align; |
252b5132 RH |
5675 | else |
5676 | { | |
5677 | size = h->size; | |
64c456e1 | 5678 | if (addend >= size) |
252b5132 RH |
5679 | { |
5680 | /* Oops! We've got a reference past the defined end of | |
5681 | the table. This is probably a bug -- shall we warn? */ | |
64c456e1 | 5682 | size = addend + file_align; |
252b5132 RH |
5683 | } |
5684 | } | |
64c456e1 | 5685 | size = (size + file_align - 1) & -file_align; |
252b5132 RH |
5686 | |
5687 | /* Allocate one extra entry for use as a "done" flag for the | |
64c456e1 AM |
5688 | consolidation pass. */ |
5689 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
252b5132 RH |
5690 | |
5691 | if (ptr) | |
5692 | { | |
268b6b39 | 5693 | ptr = bfd_realloc (ptr - 1, bytes); |
3e932841 | 5694 | |
fed79cc6 NC |
5695 | if (ptr != NULL) |
5696 | { | |
5697 | size_t oldbytes; | |
252b5132 | 5698 | |
45d6a902 | 5699 | oldbytes = (((h->vtable_entries_size >> log_file_align) + 1) |
b34976b6 | 5700 | * sizeof (bfd_boolean)); |
a7b97311 | 5701 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
fed79cc6 | 5702 | } |
252b5132 RH |
5703 | } |
5704 | else | |
268b6b39 | 5705 | ptr = bfd_zmalloc (bytes); |
252b5132 | 5706 | |
fed79cc6 | 5707 | if (ptr == NULL) |
b34976b6 | 5708 | return FALSE; |
3e932841 | 5709 | |
252b5132 | 5710 | /* And arrange for that done flag to be at index -1. */ |
fed79cc6 | 5711 | h->vtable_entries_used = ptr + 1; |
252b5132 RH |
5712 | h->vtable_entries_size = size; |
5713 | } | |
3e932841 | 5714 | |
45d6a902 | 5715 | h->vtable_entries_used[addend >> log_file_align] = TRUE; |
252b5132 | 5716 | |
b34976b6 | 5717 | return TRUE; |
252b5132 RH |
5718 | } |
5719 | ||
5720 | /* And an accompanying bit to work out final got entry offsets once | |
5721 | we're done. Should be called from final_link. */ | |
5722 | ||
b34976b6 | 5723 | bfd_boolean |
268b6b39 AM |
5724 | elf_gc_common_finalize_got_offsets (bfd *abfd, |
5725 | struct bfd_link_info *info) | |
252b5132 RH |
5726 | { |
5727 | bfd *i; | |
9c5bfbb7 | 5728 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 RH |
5729 | bfd_vma gotoff; |
5730 | ||
0eddce27 AM |
5731 | if (! is_elf_hash_table (info->hash)) |
5732 | return FALSE; | |
5733 | ||
252b5132 RH |
5734 | /* The GOT offset is relative to the .got section, but the GOT header is |
5735 | put into the .got.plt section, if the backend uses it. */ | |
5736 | if (bed->want_got_plt) | |
5737 | gotoff = 0; | |
5738 | else | |
5739 | gotoff = bed->got_header_size; | |
5740 | ||
5741 | /* Do the local .got entries first. */ | |
5742 | for (i = info->input_bfds; i; i = i->link_next) | |
5743 | { | |
f6af82bd | 5744 | bfd_signed_vma *local_got; |
252b5132 RH |
5745 | bfd_size_type j, locsymcount; |
5746 | Elf_Internal_Shdr *symtab_hdr; | |
5747 | ||
f6af82bd AM |
5748 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
5749 | continue; | |
5750 | ||
5751 | local_got = elf_local_got_refcounts (i); | |
252b5132 RH |
5752 | if (!local_got) |
5753 | continue; | |
5754 | ||
5755 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
5756 | if (elf_bad_symtab (i)) | |
5757 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
5758 | else | |
5759 | locsymcount = symtab_hdr->sh_info; | |
5760 | ||
5761 | for (j = 0; j < locsymcount; ++j) | |
5762 | { | |
5763 | if (local_got[j] > 0) | |
5764 | { | |
5765 | local_got[j] = gotoff; | |
5766 | gotoff += ARCH_SIZE / 8; | |
5767 | } | |
5768 | else | |
5769 | local_got[j] = (bfd_vma) -1; | |
5770 | } | |
5771 | } | |
5772 | ||
dd5724d5 AM |
5773 | /* Then the global .got entries. .plt refcounts are handled by |
5774 | adjust_dynamic_symbol */ | |
252b5132 RH |
5775 | elf_link_hash_traverse (elf_hash_table (info), |
5776 | elf_gc_allocate_got_offsets, | |
268b6b39 | 5777 | &gotoff); |
b34976b6 | 5778 | return TRUE; |
252b5132 RH |
5779 | } |
5780 | ||
5781 | /* We need a special top-level link routine to convert got reference counts | |
5782 | to real got offsets. */ | |
5783 | ||
b34976b6 | 5784 | static bfd_boolean |
268b6b39 | 5785 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *offarg) |
252b5132 | 5786 | { |
268b6b39 | 5787 | bfd_vma *off = offarg; |
252b5132 | 5788 | |
e92d460e AM |
5789 | if (h->root.type == bfd_link_hash_warning) |
5790 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5791 | ||
252b5132 RH |
5792 | if (h->got.refcount > 0) |
5793 | { | |
5794 | h->got.offset = off[0]; | |
5795 | off[0] += ARCH_SIZE / 8; | |
5796 | } | |
5797 | else | |
5798 | h->got.offset = (bfd_vma) -1; | |
5799 | ||
b34976b6 | 5800 | return TRUE; |
252b5132 RH |
5801 | } |
5802 | ||
5803 | /* Many folk need no more in the way of final link than this, once | |
5804 | got entry reference counting is enabled. */ | |
5805 | ||
b34976b6 | 5806 | bfd_boolean |
268b6b39 | 5807 | elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
5808 | { |
5809 | if (!elf_gc_common_finalize_got_offsets (abfd, info)) | |
b34976b6 | 5810 | return FALSE; |
252b5132 RH |
5811 | |
5812 | /* Invoke the regular ELF backend linker to do all the work. */ | |
5813 | return elf_bfd_final_link (abfd, info); | |
5814 | } | |
5815 | ||
5816 | /* This function will be called though elf_link_hash_traverse to store | |
5817 | all hash value of the exported symbols in an array. */ | |
5818 | ||
b34976b6 | 5819 | static bfd_boolean |
268b6b39 | 5820 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) |
252b5132 | 5821 | { |
268b6b39 | 5822 | unsigned long **valuep = data; |
252b5132 RH |
5823 | const char *name; |
5824 | char *p; | |
5825 | unsigned long ha; | |
5826 | char *alc = NULL; | |
5827 | ||
e92d460e AM |
5828 | if (h->root.type == bfd_link_hash_warning) |
5829 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5830 | ||
252b5132 RH |
5831 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5832 | if (h->dynindx == -1) | |
b34976b6 | 5833 | return TRUE; |
252b5132 RH |
5834 | |
5835 | name = h->root.root.string; | |
5836 | p = strchr (name, ELF_VER_CHR); | |
5837 | if (p != NULL) | |
5838 | { | |
268b6b39 AM |
5839 | alc = bfd_malloc (p - name + 1); |
5840 | memcpy (alc, name, p - name); | |
252b5132 RH |
5841 | alc[p - name] = '\0'; |
5842 | name = alc; | |
5843 | } | |
5844 | ||
5845 | /* Compute the hash value. */ | |
5846 | ha = bfd_elf_hash (name); | |
5847 | ||
5848 | /* Store the found hash value in the array given as the argument. */ | |
5849 | *(*valuep)++ = ha; | |
5850 | ||
5851 | /* And store it in the struct so that we can put it in the hash table | |
5852 | later. */ | |
5853 | h->elf_hash_value = ha; | |
5854 | ||
5855 | if (alc != NULL) | |
5856 | free (alc); | |
5857 | ||
b34976b6 | 5858 | return TRUE; |
252b5132 | 5859 | } |
73d074b4 | 5860 | |
b34976b6 | 5861 | bfd_boolean |
268b6b39 | 5862 | elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) |
73d074b4 | 5863 | { |
268b6b39 | 5864 | struct elf_reloc_cookie *rcookie = cookie; |
73d074b4 DJ |
5865 | |
5866 | if (rcookie->bad_symtab) | |
5867 | rcookie->rel = rcookie->rels; | |
5868 | ||
5869 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
5870 | { | |
d6fe2dc1 | 5871 | unsigned long r_symndx; |
73d074b4 DJ |
5872 | |
5873 | if (! rcookie->bad_symtab) | |
5874 | if (rcookie->rel->r_offset > offset) | |
b34976b6 | 5875 | return FALSE; |
73d074b4 DJ |
5876 | if (rcookie->rel->r_offset != offset) |
5877 | continue; | |
5878 | ||
d6fe2dc1 AM |
5879 | r_symndx = ELF_R_SYM (rcookie->rel->r_info); |
5880 | if (r_symndx == SHN_UNDEF) | |
b34976b6 | 5881 | return TRUE; |
d6fe2dc1 | 5882 | |
73d074b4 | 5883 | if (r_symndx >= rcookie->locsymcount |
6cdc0ccc | 5884 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) |
73d074b4 DJ |
5885 | { |
5886 | struct elf_link_hash_entry *h; | |
5887 | ||
5888 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
5889 | ||
5890 | while (h->root.type == bfd_link_hash_indirect | |
5891 | || h->root.type == bfd_link_hash_warning) | |
5892 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5893 | ||
5894 | if ((h->root.type == bfd_link_hash_defined | |
5895 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 5896 | && elf_discarded_section (h->root.u.def.section)) |
b34976b6 | 5897 | return TRUE; |
73d074b4 | 5898 | else |
b34976b6 | 5899 | return FALSE; |
73d074b4 | 5900 | } |
6cdc0ccc | 5901 | else |
73d074b4 DJ |
5902 | { |
5903 | /* It's not a relocation against a global symbol, | |
44421011 | 5904 | but it could be a relocation against a local |
73d074b4 DJ |
5905 | symbol for a discarded section. */ |
5906 | asection *isec; | |
6cdc0ccc | 5907 | Elf_Internal_Sym *isym; |
73d074b4 DJ |
5908 | |
5909 | /* Need to: get the symbol; get the section. */ | |
6cdc0ccc AM |
5910 | isym = &rcookie->locsyms[r_symndx]; |
5911 | if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
73d074b4 | 5912 | { |
6cdc0ccc | 5913 | isec = section_from_elf_index (rcookie->abfd, isym->st_shndx); |
ed4de5e2 | 5914 | if (isec != NULL && elf_discarded_section (isec)) |
b34976b6 | 5915 | return TRUE; |
73d074b4 DJ |
5916 | } |
5917 | } | |
b34976b6 | 5918 | return FALSE; |
73d074b4 | 5919 | } |
b34976b6 | 5920 | return FALSE; |
73d074b4 DJ |
5921 | } |
5922 | ||
5923 | /* Discard unneeded references to discarded sections. | |
b34976b6 | 5924 | Returns TRUE if any section's size was changed. */ |
73d074b4 | 5925 | /* This function assumes that the relocations are in sorted order, |
ab3acfbe | 5926 | which is true for all known assemblers. */ |
73d074b4 | 5927 | |
b34976b6 | 5928 | bfd_boolean |
268b6b39 | 5929 | elf_bfd_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
73d074b4 DJ |
5930 | { |
5931 | struct elf_reloc_cookie cookie; | |
126495ed | 5932 | asection *stab, *eh; |
73d074b4 | 5933 | Elf_Internal_Shdr *symtab_hdr; |
9c5bfbb7 | 5934 | const struct elf_backend_data *bed; |
73d074b4 | 5935 | bfd *abfd; |
99eb2ac8 | 5936 | unsigned int count; |
b34976b6 | 5937 | bfd_boolean ret = FALSE; |
73d074b4 | 5938 | |
d6fe2dc1 | 5939 | if (info->traditional_format |
0eddce27 | 5940 | || !is_elf_hash_table (info->hash)) |
b34976b6 | 5941 | return FALSE; |
65765700 | 5942 | |
73d074b4 DJ |
5943 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
5944 | { | |
163c1c30 L |
5945 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
5946 | continue; | |
5947 | ||
73d074b4 DJ |
5948 | bed = get_elf_backend_data (abfd); |
5949 | ||
5950 | if ((abfd->flags & DYNAMIC) != 0) | |
5951 | continue; | |
5952 | ||
126495ed | 5953 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); |
1049f94e | 5954 | if (info->relocatable |
2d36fe5f AH |
5955 | || (eh != NULL |
5956 | && (eh->_raw_size == 0 | |
5957 | || bfd_is_abs_section (eh->output_section)))) | |
126495ed | 5958 | eh = NULL; |
65765700 | 5959 | |
99eb2ac8 AM |
5960 | stab = bfd_get_section_by_name (abfd, ".stab"); |
5961 | if (stab != NULL | |
5962 | && (stab->_raw_size == 0 | |
5963 | || bfd_is_abs_section (stab->output_section) | |
68bfbfcc | 5964 | || stab->sec_info_type != ELF_INFO_TYPE_STABS)) |
99eb2ac8 AM |
5965 | stab = NULL; |
5966 | ||
5967 | if (stab == NULL | |
5968 | && eh == NULL | |
5969 | && bed->elf_backend_discard_info == NULL) | |
73d074b4 DJ |
5970 | continue; |
5971 | ||
5972 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
73d074b4 DJ |
5973 | cookie.abfd = abfd; |
5974 | cookie.sym_hashes = elf_sym_hashes (abfd); | |
5975 | cookie.bad_symtab = elf_bad_symtab (abfd); | |
5976 | if (cookie.bad_symtab) | |
5977 | { | |
99eb2ac8 | 5978 | cookie.locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); |
73d074b4 DJ |
5979 | cookie.extsymoff = 0; |
5980 | } | |
5981 | else | |
5982 | { | |
5983 | cookie.locsymcount = symtab_hdr->sh_info; | |
5984 | cookie.extsymoff = symtab_hdr->sh_info; | |
5985 | } | |
5986 | ||
6cdc0ccc AM |
5987 | cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
5988 | if (cookie.locsyms == NULL && cookie.locsymcount != 0) | |
c44233aa | 5989 | { |
6cdc0ccc AM |
5990 | cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
5991 | cookie.locsymcount, 0, | |
5992 | NULL, NULL, NULL); | |
c44233aa | 5993 | if (cookie.locsyms == NULL) |
b34976b6 | 5994 | return FALSE; |
9ad5cbcf | 5995 | } |
73d074b4 | 5996 | |
99eb2ac8 | 5997 | if (stab != NULL) |
73d074b4 | 5998 | { |
99eb2ac8 AM |
5999 | cookie.rels = NULL; |
6000 | count = stab->reloc_count; | |
6001 | if (count != 0) | |
268b6b39 AM |
6002 | cookie.rels = _bfd_elf_link_read_relocs (abfd, stab, NULL, NULL, |
6003 | info->keep_memory); | |
99eb2ac8 | 6004 | if (cookie.rels != NULL) |
73d074b4 DJ |
6005 | { |
6006 | cookie.rel = cookie.rels; | |
99eb2ac8 AM |
6007 | cookie.relend = cookie.rels; |
6008 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
65765700 JJ |
6009 | if (_bfd_discard_section_stabs (abfd, stab, |
6010 | elf_section_data (stab)->sec_info, | |
73d074b4 DJ |
6011 | elf_reloc_symbol_deleted_p, |
6012 | &cookie)) | |
b34976b6 | 6013 | ret = TRUE; |
6cdc0ccc | 6014 | if (elf_section_data (stab)->relocs != cookie.rels) |
73d074b4 DJ |
6015 | free (cookie.rels); |
6016 | } | |
6017 | } | |
6018 | ||
99eb2ac8 | 6019 | if (eh != NULL) |
65765700 JJ |
6020 | { |
6021 | cookie.rels = NULL; | |
99eb2ac8 AM |
6022 | count = eh->reloc_count; |
6023 | if (count != 0) | |
268b6b39 AM |
6024 | cookie.rels = _bfd_elf_link_read_relocs (abfd, eh, NULL, NULL, |
6025 | info->keep_memory); | |
99eb2ac8 AM |
6026 | cookie.rel = cookie.rels; |
6027 | cookie.relend = cookie.rels; | |
6028 | if (cookie.rels != NULL) | |
6029 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
6030 | ||
126495ed | 6031 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
65765700 JJ |
6032 | elf_reloc_symbol_deleted_p, |
6033 | &cookie)) | |
b34976b6 | 6034 | ret = TRUE; |
99eb2ac8 AM |
6035 | |
6036 | if (cookie.rels != NULL | |
6037 | && elf_section_data (eh)->relocs != cookie.rels) | |
65765700 JJ |
6038 | free (cookie.rels); |
6039 | } | |
6040 | ||
99eb2ac8 AM |
6041 | if (bed->elf_backend_discard_info != NULL |
6042 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
b34976b6 | 6043 | ret = TRUE; |
73d074b4 | 6044 | |
6cdc0ccc AM |
6045 | if (cookie.locsyms != NULL |
6046 | && symtab_hdr->contents != (unsigned char *) cookie.locsyms) | |
6047 | { | |
6048 | if (! info->keep_memory) | |
6049 | free (cookie.locsyms); | |
6050 | else | |
6051 | symtab_hdr->contents = (unsigned char *) cookie.locsyms; | |
6052 | } | |
73d074b4 | 6053 | } |
65765700 | 6054 | |
126495ed | 6055 | if (info->eh_frame_hdr |
1049f94e | 6056 | && !info->relocatable |
126495ed | 6057 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
b34976b6 | 6058 | ret = TRUE; |
99eb2ac8 | 6059 | |
73d074b4 DJ |
6060 | return ret; |
6061 | } | |
6062 | ||
b34976b6 | 6063 | static bfd_boolean |
268b6b39 | 6064 | elf_section_ignore_discarded_relocs (asection *sec) |
73d074b4 | 6065 | { |
9c5bfbb7 | 6066 | const struct elf_backend_data *bed; |
40b829d4 | 6067 | |
68bfbfcc | 6068 | switch (sec->sec_info_type) |
65765700 JJ |
6069 | { |
6070 | case ELF_INFO_TYPE_STABS: | |
6071 | case ELF_INFO_TYPE_EH_FRAME: | |
b34976b6 | 6072 | return TRUE; |
65765700 JJ |
6073 | default: |
6074 | break; | |
6075 | } | |
40b829d4 AM |
6076 | |
6077 | bed = get_elf_backend_data (sec->owner); | |
6078 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
6079 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
b34976b6 | 6080 | return TRUE; |
65765700 | 6081 | |
b34976b6 | 6082 | return FALSE; |
73d074b4 | 6083 | } |