Commit | Line | Data |
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252b5132 | 1 | /* ELF linker support. |
68bfbfcc | 2 | Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
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 | ||
23 | /* This struct is used to pass information to routines called via | |
24 | elf_link_hash_traverse which must return failure. */ | |
25 | ||
26 | struct elf_info_failed | |
27 | { | |
b34976b6 | 28 | bfd_boolean failed; |
252b5132 | 29 | struct bfd_link_info *info; |
bc2b6df7 | 30 | struct bfd_elf_version_tree *verdefs; |
252b5132 RH |
31 | }; |
32 | ||
b34976b6 | 33 | static bfd_boolean is_global_data_symbol_definition |
a7b97311 | 34 | PARAMS ((bfd *, Elf_Internal_Sym *)); |
b34976b6 | 35 | static bfd_boolean elf_link_is_defined_archive_symbol |
a7b97311 | 36 | PARAMS ((bfd *, carsym *)); |
b34976b6 | 37 | static bfd_boolean elf_link_add_object_symbols |
252b5132 | 38 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 39 | static bfd_boolean elf_link_add_archive_symbols |
252b5132 | 40 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 41 | static bfd_boolean elf_merge_symbol |
215007a6 L |
42 | PARAMS ((bfd *, struct bfd_link_info *, const char *, |
43 | Elf_Internal_Sym *, asection **, bfd_vma *, | |
b34976b6 AM |
44 | struct elf_link_hash_entry **, bfd_boolean *, bfd_boolean *, |
45 | bfd_boolean *, bfd_boolean)); | |
46 | static bfd_boolean elf_add_default_symbol | |
215007a6 L |
47 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
48 | const char *, Elf_Internal_Sym *, asection **, bfd_vma *, | |
b34976b6 AM |
49 | bfd_boolean *, bfd_boolean, bfd_boolean)); |
50 | static bfd_boolean elf_export_symbol | |
252b5132 | 51 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 52 | static bfd_boolean elf_finalize_dynstr |
2b0f7ef9 | 53 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 54 | static bfd_boolean elf_fix_symbol_flags |
252b5132 | 55 | PARAMS ((struct elf_link_hash_entry *, struct elf_info_failed *)); |
b34976b6 | 56 | static bfd_boolean elf_adjust_dynamic_symbol |
252b5132 | 57 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 58 | static bfd_boolean elf_link_find_version_dependencies |
252b5132 | 59 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 60 | static bfd_boolean elf_link_assign_sym_version |
252b5132 | 61 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 62 | static bfd_boolean elf_collect_hash_codes |
252b5132 | 63 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 64 | static bfd_boolean elf_link_read_relocs_from_section |
6b5bd373 | 65 | PARAMS ((bfd *, Elf_Internal_Shdr *, PTR, Elf_Internal_Rela *)); |
a7b97311 AM |
66 | static size_t compute_bucket_count |
67 | PARAMS ((struct bfd_link_info *)); | |
b34976b6 | 68 | static bfd_boolean elf_link_output_relocs |
23bc299b | 69 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *)); |
b34976b6 | 70 | static bfd_boolean elf_link_size_reloc_section |
23bc299b | 71 | PARAMS ((bfd *, Elf_Internal_Shdr *, asection *)); |
3e932841 KH |
72 | static void elf_link_adjust_relocs |
73 | PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned int, | |
31367b81 | 74 | struct elf_link_hash_entry **)); |
db6751f2 JJ |
75 | static int elf_link_sort_cmp1 |
76 | PARAMS ((const void *, const void *)); | |
77 | static int elf_link_sort_cmp2 | |
78 | PARAMS ((const void *, const void *)); | |
79 | static size_t elf_link_sort_relocs | |
80 | PARAMS ((bfd *, struct bfd_link_info *, asection **)); | |
b34976b6 | 81 | static bfd_boolean elf_section_ignore_discarded_relocs |
73d074b4 | 82 | PARAMS ((asection *)); |
252b5132 RH |
83 | |
84 | /* Given an ELF BFD, add symbols to the global hash table as | |
85 | appropriate. */ | |
86 | ||
b34976b6 | 87 | bfd_boolean |
252b5132 RH |
88 | elf_bfd_link_add_symbols (abfd, info) |
89 | bfd *abfd; | |
90 | struct bfd_link_info *info; | |
91 | { | |
92 | switch (bfd_get_format (abfd)) | |
93 | { | |
94 | case bfd_object: | |
95 | return elf_link_add_object_symbols (abfd, info); | |
96 | case bfd_archive: | |
97 | return elf_link_add_archive_symbols (abfd, info); | |
98 | default: | |
99 | bfd_set_error (bfd_error_wrong_format); | |
b34976b6 | 100 | return FALSE; |
252b5132 RH |
101 | } |
102 | } | |
103 | \f | |
b34976b6 AM |
104 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ |
105 | static bfd_boolean | |
7da9d88f | 106 | is_global_data_symbol_definition (abfd, sym) |
86033394 | 107 | bfd * abfd ATTRIBUTE_UNUSED; |
48dfb430 NC |
108 | Elf_Internal_Sym * sym; |
109 | { | |
110 | /* Local symbols do not count, but target specific ones might. */ | |
111 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
112 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
b34976b6 | 113 | return FALSE; |
48dfb430 | 114 | |
7da9d88f NC |
115 | /* Function symbols do not count. */ |
116 | if (ELF_ST_TYPE (sym->st_info) == STT_FUNC) | |
b34976b6 | 117 | return FALSE; |
7da9d88f | 118 | |
48dfb430 NC |
119 | /* If the section is undefined, then so is the symbol. */ |
120 | if (sym->st_shndx == SHN_UNDEF) | |
b34976b6 | 121 | return FALSE; |
3e932841 | 122 | |
48dfb430 NC |
123 | /* If the symbol is defined in the common section, then |
124 | it is a common definition and so does not count. */ | |
125 | if (sym->st_shndx == SHN_COMMON) | |
b34976b6 | 126 | return FALSE; |
48dfb430 NC |
127 | |
128 | /* If the symbol is in a target specific section then we | |
129 | must rely upon the backend to tell us what it is. */ | |
130 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
131 | /* FIXME - this function is not coded yet: | |
3e932841 | 132 | |
48dfb430 | 133 | return _bfd_is_global_symbol_definition (abfd, sym); |
3e932841 | 134 | |
48dfb430 NC |
135 | Instead for now assume that the definition is not global, |
136 | Even if this is wrong, at least the linker will behave | |
137 | in the same way that it used to do. */ | |
b34976b6 | 138 | return FALSE; |
3e932841 | 139 | |
b34976b6 | 140 | return TRUE; |
48dfb430 NC |
141 | } |
142 | ||
a3a8c91d | 143 | /* Search the symbol table of the archive element of the archive ABFD |
4e8a9624 | 144 | whose archive map contains a mention of SYMDEF, and determine if |
a3a8c91d | 145 | the symbol is defined in this element. */ |
b34976b6 | 146 | static bfd_boolean |
a3a8c91d NC |
147 | elf_link_is_defined_archive_symbol (abfd, symdef) |
148 | bfd * abfd; | |
149 | carsym * symdef; | |
150 | { | |
151 | Elf_Internal_Shdr * hdr; | |
dc810e39 AM |
152 | bfd_size_type symcount; |
153 | bfd_size_type extsymcount; | |
154 | bfd_size_type extsymoff; | |
6cdc0ccc AM |
155 | Elf_Internal_Sym *isymbuf; |
156 | Elf_Internal_Sym *isym; | |
157 | Elf_Internal_Sym *isymend; | |
b34976b6 | 158 | bfd_boolean result; |
3e932841 | 159 | |
a3a8c91d NC |
160 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); |
161 | if (abfd == (bfd *) NULL) | |
b34976b6 | 162 | return FALSE; |
a3a8c91d NC |
163 | |
164 | if (! bfd_check_format (abfd, bfd_object)) | |
b34976b6 | 165 | return FALSE; |
a3a8c91d | 166 | |
48dfb430 NC |
167 | /* If we have already included the element containing this symbol in the |
168 | link then we do not need to include it again. Just claim that any symbol | |
169 | it contains is not a definition, so that our caller will not decide to | |
170 | (re)include this element. */ | |
171 | if (abfd->archive_pass) | |
b34976b6 | 172 | return FALSE; |
3e932841 | 173 | |
a3a8c91d NC |
174 | /* Select the appropriate symbol table. */ |
175 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
6cdc0ccc | 176 | hdr = &elf_tdata (abfd)->symtab_hdr; |
a3a8c91d | 177 | else |
6cdc0ccc | 178 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; |
a3a8c91d NC |
179 | |
180 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
181 | ||
182 | /* The sh_info field of the symtab header tells us where the | |
183 | external symbols start. We don't care about the local symbols. */ | |
184 | if (elf_bad_symtab (abfd)) | |
185 | { | |
186 | extsymcount = symcount; | |
187 | extsymoff = 0; | |
188 | } | |
189 | else | |
190 | { | |
191 | extsymcount = symcount - hdr->sh_info; | |
192 | extsymoff = hdr->sh_info; | |
193 | } | |
194 | ||
6cdc0ccc | 195 | if (extsymcount == 0) |
b34976b6 | 196 | return FALSE; |
a3a8c91d | 197 | |
6cdc0ccc AM |
198 | /* Read in the symbol table. */ |
199 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
200 | NULL, NULL, NULL); | |
201 | if (isymbuf == NULL) | |
b34976b6 | 202 | return FALSE; |
a3a8c91d NC |
203 | |
204 | /* Scan the symbol table looking for SYMDEF. */ | |
b34976b6 | 205 | result = FALSE; |
6cdc0ccc | 206 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) |
a3a8c91d | 207 | { |
6cdc0ccc | 208 | const char *name; |
a3a8c91d | 209 | |
6cdc0ccc AM |
210 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
211 | isym->st_name); | |
a3a8c91d NC |
212 | if (name == (const char *) NULL) |
213 | break; | |
214 | ||
215 | if (strcmp (name, symdef->name) == 0) | |
216 | { | |
6cdc0ccc | 217 | result = is_global_data_symbol_definition (abfd, isym); |
a3a8c91d NC |
218 | break; |
219 | } | |
220 | } | |
221 | ||
6cdc0ccc | 222 | free (isymbuf); |
3e932841 | 223 | |
a3a8c91d NC |
224 | return result; |
225 | } | |
226 | \f | |
252b5132 RH |
227 | /* Add symbols from an ELF archive file to the linker hash table. We |
228 | don't use _bfd_generic_link_add_archive_symbols because of a | |
229 | problem which arises on UnixWare. The UnixWare libc.so is an | |
230 | archive which includes an entry libc.so.1 which defines a bunch of | |
231 | symbols. The libc.so archive also includes a number of other | |
232 | object files, which also define symbols, some of which are the same | |
233 | as those defined in libc.so.1. Correct linking requires that we | |
234 | consider each object file in turn, and include it if it defines any | |
235 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
236 | this; it looks through the list of undefined symbols, and includes | |
237 | any object file which defines them. When this algorithm is used on | |
238 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
239 | bunch of symbols. This means that some of the other objects in the | |
240 | archive are not included in the link, which is incorrect since they | |
241 | precede libc.so.1 in the archive. | |
242 | ||
243 | Fortunately, ELF archive handling is simpler than that done by | |
244 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
245 | oddities. In ELF, if we find a symbol in the archive map, and the | |
246 | symbol is currently undefined, we know that we must pull in that | |
247 | object file. | |
248 | ||
249 | Unfortunately, we do have to make multiple passes over the symbol | |
250 | table until nothing further is resolved. */ | |
251 | ||
b34976b6 | 252 | static bfd_boolean |
252b5132 RH |
253 | elf_link_add_archive_symbols (abfd, info) |
254 | bfd *abfd; | |
255 | struct bfd_link_info *info; | |
256 | { | |
257 | symindex c; | |
b34976b6 AM |
258 | bfd_boolean *defined = NULL; |
259 | bfd_boolean *included = NULL; | |
252b5132 | 260 | carsym *symdefs; |
b34976b6 | 261 | bfd_boolean loop; |
dc810e39 | 262 | bfd_size_type amt; |
252b5132 RH |
263 | |
264 | if (! bfd_has_map (abfd)) | |
265 | { | |
266 | /* An empty archive is a special case. */ | |
267 | if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL) | |
b34976b6 | 268 | return TRUE; |
252b5132 | 269 | bfd_set_error (bfd_error_no_armap); |
b34976b6 | 270 | return FALSE; |
252b5132 RH |
271 | } |
272 | ||
273 | /* Keep track of all symbols we know to be already defined, and all | |
274 | files we know to be already included. This is to speed up the | |
275 | second and subsequent passes. */ | |
276 | c = bfd_ardata (abfd)->symdef_count; | |
277 | if (c == 0) | |
b34976b6 | 278 | return TRUE; |
dc810e39 | 279 | amt = c; |
b34976b6 AM |
280 | amt *= sizeof (bfd_boolean); |
281 | defined = (bfd_boolean *) bfd_zmalloc (amt); | |
282 | included = (bfd_boolean *) bfd_zmalloc (amt); | |
283 | if (defined == (bfd_boolean *) NULL || included == (bfd_boolean *) NULL) | |
252b5132 | 284 | goto error_return; |
252b5132 RH |
285 | |
286 | symdefs = bfd_ardata (abfd)->symdefs; | |
287 | ||
288 | do | |
289 | { | |
290 | file_ptr last; | |
291 | symindex i; | |
292 | carsym *symdef; | |
293 | carsym *symdefend; | |
294 | ||
b34976b6 | 295 | loop = FALSE; |
252b5132 RH |
296 | last = -1; |
297 | ||
298 | symdef = symdefs; | |
299 | symdefend = symdef + c; | |
300 | for (i = 0; symdef < symdefend; symdef++, i++) | |
301 | { | |
302 | struct elf_link_hash_entry *h; | |
303 | bfd *element; | |
304 | struct bfd_link_hash_entry *undefs_tail; | |
305 | symindex mark; | |
306 | ||
307 | if (defined[i] || included[i]) | |
308 | continue; | |
309 | if (symdef->file_offset == last) | |
310 | { | |
b34976b6 | 311 | included[i] = TRUE; |
252b5132 RH |
312 | continue; |
313 | } | |
314 | ||
315 | h = elf_link_hash_lookup (elf_hash_table (info), symdef->name, | |
b34976b6 | 316 | FALSE, FALSE, FALSE); |
252b5132 RH |
317 | |
318 | if (h == NULL) | |
319 | { | |
320 | char *p, *copy; | |
48fc70a2 | 321 | size_t len, first; |
252b5132 RH |
322 | |
323 | /* If this is a default version (the name contains @@), | |
48fc70a2 AM |
324 | look up the symbol again with only one `@' as well |
325 | as without the version. The effect is that references | |
326 | to the symbol with and without the version will be | |
327 | matched by the default symbol in the archive. */ | |
252b5132 RH |
328 | |
329 | p = strchr (symdef->name, ELF_VER_CHR); | |
330 | if (p == NULL || p[1] != ELF_VER_CHR) | |
331 | continue; | |
332 | ||
48fc70a2 AM |
333 | /* First check with only one `@'. */ |
334 | len = strlen (symdef->name); | |
335 | copy = bfd_alloc (abfd, (bfd_size_type) len); | |
252b5132 RH |
336 | if (copy == NULL) |
337 | goto error_return; | |
48fc70a2 AM |
338 | first = p - symdef->name + 1; |
339 | memcpy (copy, symdef->name, first); | |
340 | memcpy (copy + first, symdef->name + first + 1, len - first); | |
252b5132 RH |
341 | |
342 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
b34976b6 | 343 | FALSE, FALSE, FALSE); |
252b5132 | 344 | |
48fc70a2 | 345 | if (h == NULL) |
58821868 | 346 | { |
48fc70a2 AM |
347 | /* We also need to check references to the symbol |
348 | without the version. */ | |
349 | ||
350 | copy[first - 1] = '\0'; | |
351 | h = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 | 352 | copy, FALSE, FALSE, FALSE); |
48fc70a2 AM |
353 | } |
354 | ||
252b5132 RH |
355 | bfd_release (abfd, copy); |
356 | } | |
357 | ||
358 | if (h == NULL) | |
359 | continue; | |
360 | ||
a3a8c91d NC |
361 | if (h->root.type == bfd_link_hash_common) |
362 | { | |
363 | /* We currently have a common symbol. The archive map contains | |
364 | a reference to this symbol, so we may want to include it. We | |
365 | only want to include it however, if this archive element | |
366 | contains a definition of the symbol, not just another common | |
367 | declaration of it. | |
368 | ||
369 | Unfortunately some archivers (including GNU ar) will put | |
370 | declarations of common symbols into their archive maps, as | |
371 | well as real definitions, so we cannot just go by the archive | |
372 | map alone. Instead we must read in the element's symbol | |
373 | table and check that to see what kind of symbol definition | |
374 | this is. */ | |
375 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
376 | continue; | |
377 | } | |
378 | else if (h->root.type != bfd_link_hash_undefined) | |
252b5132 RH |
379 | { |
380 | if (h->root.type != bfd_link_hash_undefweak) | |
b34976b6 | 381 | defined[i] = TRUE; |
252b5132 RH |
382 | continue; |
383 | } | |
384 | ||
385 | /* We need to include this archive member. */ | |
252b5132 RH |
386 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); |
387 | if (element == (bfd *) NULL) | |
388 | goto error_return; | |
389 | ||
390 | if (! bfd_check_format (element, bfd_object)) | |
391 | goto error_return; | |
392 | ||
393 | /* Doublecheck that we have not included this object | |
394 | already--it should be impossible, but there may be | |
395 | something wrong with the archive. */ | |
396 | if (element->archive_pass != 0) | |
397 | { | |
398 | bfd_set_error (bfd_error_bad_value); | |
399 | goto error_return; | |
400 | } | |
401 | element->archive_pass = 1; | |
402 | ||
403 | undefs_tail = info->hash->undefs_tail; | |
404 | ||
405 | if (! (*info->callbacks->add_archive_element) (info, element, | |
406 | symdef->name)) | |
407 | goto error_return; | |
408 | if (! elf_link_add_object_symbols (element, info)) | |
409 | goto error_return; | |
410 | ||
411 | /* If there are any new undefined symbols, we need to make | |
412 | another pass through the archive in order to see whether | |
413 | they can be defined. FIXME: This isn't perfect, because | |
414 | common symbols wind up on undefs_tail and because an | |
415 | undefined symbol which is defined later on in this pass | |
416 | does not require another pass. This isn't a bug, but it | |
417 | does make the code less efficient than it could be. */ | |
418 | if (undefs_tail != info->hash->undefs_tail) | |
b34976b6 | 419 | loop = TRUE; |
252b5132 RH |
420 | |
421 | /* Look backward to mark all symbols from this object file | |
422 | which we have already seen in this pass. */ | |
423 | mark = i; | |
424 | do | |
425 | { | |
b34976b6 | 426 | included[mark] = TRUE; |
252b5132 RH |
427 | if (mark == 0) |
428 | break; | |
429 | --mark; | |
430 | } | |
431 | while (symdefs[mark].file_offset == symdef->file_offset); | |
432 | ||
433 | /* We mark subsequent symbols from this object file as we go | |
434 | on through the loop. */ | |
435 | last = symdef->file_offset; | |
436 | } | |
437 | } | |
438 | while (loop); | |
439 | ||
440 | free (defined); | |
441 | free (included); | |
442 | ||
b34976b6 | 443 | return TRUE; |
252b5132 RH |
444 | |
445 | error_return: | |
b34976b6 | 446 | if (defined != (bfd_boolean *) NULL) |
252b5132 | 447 | free (defined); |
b34976b6 | 448 | if (included != (bfd_boolean *) NULL) |
252b5132 | 449 | free (included); |
b34976b6 | 450 | return FALSE; |
252b5132 RH |
451 | } |
452 | ||
453 | /* This function is called when we want to define a new symbol. It | |
454 | handles the various cases which arise when we find a definition in | |
455 | a dynamic object, or when there is already a definition in a | |
456 | dynamic object. The new symbol is described by NAME, SYM, PSEC, | |
457 | and PVALUE. We set SYM_HASH to the hash table entry. We set | |
458 | OVERRIDE if the old symbol is overriding a new definition. We set | |
459 | TYPE_CHANGE_OK if it is OK for the type to change. We set | |
460 | SIZE_CHANGE_OK if it is OK for the size to change. By OK to | |
461 | change, we mean that we shouldn't warn if the type or size does | |
456981d7 L |
462 | change. DT_NEEDED indicates if it comes from a DT_NEEDED entry of |
463 | a shared object. */ | |
252b5132 | 464 | |
b34976b6 | 465 | static bfd_boolean |
252b5132 | 466 | elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash, |
456981d7 | 467 | override, type_change_ok, size_change_ok, dt_needed) |
252b5132 RH |
468 | bfd *abfd; |
469 | struct bfd_link_info *info; | |
470 | const char *name; | |
471 | Elf_Internal_Sym *sym; | |
472 | asection **psec; | |
473 | bfd_vma *pvalue; | |
474 | struct elf_link_hash_entry **sym_hash; | |
b34976b6 AM |
475 | bfd_boolean *override; |
476 | bfd_boolean *type_change_ok; | |
477 | bfd_boolean *size_change_ok; | |
478 | bfd_boolean dt_needed; | |
252b5132 RH |
479 | { |
480 | asection *sec; | |
481 | struct elf_link_hash_entry *h; | |
482 | int bind; | |
483 | bfd *oldbfd; | |
b34976b6 | 484 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; |
252b5132 | 485 | |
b34976b6 | 486 | *override = FALSE; |
252b5132 RH |
487 | |
488 | sec = *psec; | |
489 | bind = ELF_ST_BIND (sym->st_info); | |
490 | ||
491 | if (! bfd_is_und_section (sec)) | |
b34976b6 | 492 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); |
252b5132 RH |
493 | else |
494 | h = ((struct elf_link_hash_entry *) | |
b34976b6 | 495 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); |
252b5132 | 496 | if (h == NULL) |
b34976b6 | 497 | return FALSE; |
252b5132 RH |
498 | *sym_hash = h; |
499 | ||
500 | /* This code is for coping with dynamic objects, and is only useful | |
501 | if we are doing an ELF link. */ | |
502 | if (info->hash->creator != abfd->xvec) | |
b34976b6 | 503 | return TRUE; |
252b5132 RH |
504 | |
505 | /* For merging, we only care about real symbols. */ | |
506 | ||
507 | while (h->root.type == bfd_link_hash_indirect | |
508 | || h->root.type == bfd_link_hash_warning) | |
509 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
510 | ||
511 | /* If we just created the symbol, mark it as being an ELF symbol. | |
512 | Other than that, there is nothing to do--there is no merge issue | |
513 | with a newly defined symbol--so we just return. */ | |
514 | ||
515 | if (h->root.type == bfd_link_hash_new) | |
516 | { | |
517 | h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF; | |
b34976b6 | 518 | return TRUE; |
252b5132 RH |
519 | } |
520 | ||
521 | /* OLDBFD is a BFD associated with the existing symbol. */ | |
522 | ||
523 | switch (h->root.type) | |
524 | { | |
525 | default: | |
526 | oldbfd = NULL; | |
527 | break; | |
528 | ||
529 | case bfd_link_hash_undefined: | |
530 | case bfd_link_hash_undefweak: | |
531 | oldbfd = h->root.u.undef.abfd; | |
532 | break; | |
533 | ||
534 | case bfd_link_hash_defined: | |
535 | case bfd_link_hash_defweak: | |
536 | oldbfd = h->root.u.def.section->owner; | |
537 | break; | |
538 | ||
539 | case bfd_link_hash_common: | |
540 | oldbfd = h->root.u.c.p->section->owner; | |
541 | break; | |
542 | } | |
543 | ||
b4536acd ILT |
544 | /* In cases involving weak versioned symbols, we may wind up trying |
545 | to merge a symbol with itself. Catch that here, to avoid the | |
546 | confusion that results if we try to override a symbol with | |
accc7f69 ILT |
547 | itself. The additional tests catch cases like |
548 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
549 | dynamic object, which we do want to handle here. */ | |
550 | if (abfd == oldbfd | |
551 | && ((abfd->flags & DYNAMIC) == 0 | |
552 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
b34976b6 | 553 | return TRUE; |
b4536acd | 554 | |
252b5132 RH |
555 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
556 | respectively, is from a dynamic object. */ | |
557 | ||
558 | if ((abfd->flags & DYNAMIC) != 0) | |
b34976b6 | 559 | newdyn = TRUE; |
252b5132 | 560 | else |
b34976b6 | 561 | newdyn = FALSE; |
252b5132 | 562 | |
0035bd7b ILT |
563 | if (oldbfd != NULL) |
564 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
252b5132 | 565 | else |
0035bd7b ILT |
566 | { |
567 | asection *hsec; | |
568 | ||
569 | /* This code handles the special SHN_MIPS_{TEXT,DATA} section | |
c44233aa | 570 | indices used by MIPS ELF. */ |
0035bd7b ILT |
571 | switch (h->root.type) |
572 | { | |
573 | default: | |
574 | hsec = NULL; | |
575 | break; | |
576 | ||
577 | case bfd_link_hash_defined: | |
578 | case bfd_link_hash_defweak: | |
579 | hsec = h->root.u.def.section; | |
580 | break; | |
581 | ||
582 | case bfd_link_hash_common: | |
583 | hsec = h->root.u.c.p->section; | |
584 | break; | |
585 | } | |
586 | ||
587 | if (hsec == NULL) | |
b34976b6 | 588 | olddyn = FALSE; |
0035bd7b ILT |
589 | else |
590 | olddyn = (hsec->symbol->flags & BSF_DYNAMIC) != 0; | |
591 | } | |
252b5132 RH |
592 | |
593 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, | |
594 | respectively, appear to be a definition rather than reference. */ | |
595 | ||
596 | if (bfd_is_und_section (sec) || bfd_is_com_section (sec)) | |
b34976b6 | 597 | newdef = FALSE; |
252b5132 | 598 | else |
b34976b6 | 599 | newdef = TRUE; |
252b5132 RH |
600 | |
601 | if (h->root.type == bfd_link_hash_undefined | |
602 | || h->root.type == bfd_link_hash_undefweak | |
603 | || h->root.type == bfd_link_hash_common) | |
b34976b6 | 604 | olddef = FALSE; |
252b5132 | 605 | else |
b34976b6 | 606 | olddef = TRUE; |
252b5132 RH |
607 | |
608 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old | |
609 | symbol, respectively, appears to be a common symbol in a dynamic | |
610 | object. If a symbol appears in an uninitialized section, and is | |
611 | not weak, and is not a function, then it may be a common symbol | |
612 | which was resolved when the dynamic object was created. We want | |
613 | to treat such symbols specially, because they raise special | |
614 | considerations when setting the symbol size: if the symbol | |
615 | appears as a common symbol in a regular object, and the size in | |
616 | the regular object is larger, we must make sure that we use the | |
617 | larger size. This problematic case can always be avoided in C, | |
618 | but it must be handled correctly when using Fortran shared | |
619 | libraries. | |
620 | ||
621 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
622 | likewise for OLDDYNCOMMON and OLDDEF. | |
623 | ||
624 | Note that this test is just a heuristic, and that it is quite | |
625 | possible to have an uninitialized symbol in a shared object which | |
626 | is really a definition, rather than a common symbol. This could | |
627 | lead to some minor confusion when the symbol really is a common | |
628 | symbol in some regular object. However, I think it will be | |
629 | harmless. */ | |
630 | ||
631 | if (newdyn | |
632 | && newdef | |
633 | && (sec->flags & SEC_ALLOC) != 0 | |
634 | && (sec->flags & SEC_LOAD) == 0 | |
635 | && sym->st_size > 0 | |
636 | && bind != STB_WEAK | |
637 | && ELF_ST_TYPE (sym->st_info) != STT_FUNC) | |
b34976b6 | 638 | newdyncommon = TRUE; |
252b5132 | 639 | else |
b34976b6 | 640 | newdyncommon = FALSE; |
252b5132 RH |
641 | |
642 | if (olddyn | |
643 | && olddef | |
644 | && h->root.type == bfd_link_hash_defined | |
645 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
646 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 | |
647 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
648 | && h->size > 0 | |
649 | && h->type != STT_FUNC) | |
b34976b6 | 650 | olddyncommon = TRUE; |
252b5132 | 651 | else |
b34976b6 | 652 | olddyncommon = FALSE; |
252b5132 RH |
653 | |
654 | /* It's OK to change the type if either the existing symbol or the | |
456981d7 L |
655 | new symbol is weak unless it comes from a DT_NEEDED entry of |
656 | a shared object, in which case, the DT_NEEDED entry may not be | |
3e932841 | 657 | required at the run time. */ |
252b5132 | 658 | |
456981d7 | 659 | if ((! dt_needed && h->root.type == bfd_link_hash_defweak) |
252b5132 RH |
660 | || h->root.type == bfd_link_hash_undefweak |
661 | || bind == STB_WEAK) | |
b34976b6 | 662 | *type_change_ok = TRUE; |
252b5132 RH |
663 | |
664 | /* It's OK to change the size if either the existing symbol or the | |
665 | new symbol is weak, or if the old symbol is undefined. */ | |
666 | ||
667 | if (*type_change_ok | |
668 | || h->root.type == bfd_link_hash_undefined) | |
b34976b6 | 669 | *size_change_ok = TRUE; |
252b5132 RH |
670 | |
671 | /* If both the old and the new symbols look like common symbols in a | |
672 | dynamic object, set the size of the symbol to the larger of the | |
673 | two. */ | |
674 | ||
675 | if (olddyncommon | |
676 | && newdyncommon | |
677 | && sym->st_size != h->size) | |
678 | { | |
679 | /* Since we think we have two common symbols, issue a multiple | |
c44233aa AM |
680 | common warning if desired. Note that we only warn if the |
681 | size is different. If the size is the same, we simply let | |
682 | the old symbol override the new one as normally happens with | |
683 | symbols defined in dynamic objects. */ | |
252b5132 RH |
684 | |
685 | if (! ((*info->callbacks->multiple_common) | |
686 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
687 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
b34976b6 | 688 | return FALSE; |
252b5132 RH |
689 | |
690 | if (sym->st_size > h->size) | |
691 | h->size = sym->st_size; | |
692 | ||
b34976b6 | 693 | *size_change_ok = TRUE; |
252b5132 RH |
694 | } |
695 | ||
696 | /* If we are looking at a dynamic object, and we have found a | |
697 | definition, we need to see if the symbol was already defined by | |
698 | some other object. If so, we want to use the existing | |
699 | definition, and we do not want to report a multiple symbol | |
700 | definition error; we do this by clobbering *PSEC to be | |
701 | bfd_und_section_ptr. | |
702 | ||
703 | We treat a common symbol as a definition if the symbol in the | |
704 | shared library is a function, since common symbols always | |
705 | represent variables; this can cause confusion in principle, but | |
706 | any such confusion would seem to indicate an erroneous program or | |
707 | shared library. We also permit a common symbol in a regular | |
0525d26e ILT |
708 | object to override a weak symbol in a shared object. |
709 | ||
710 | We prefer a non-weak definition in a shared library to a weak | |
456981d7 L |
711 | definition in the executable unless it comes from a DT_NEEDED |
712 | entry of a shared object, in which case, the DT_NEEDED entry | |
3e932841 | 713 | may not be required at the run time. */ |
252b5132 RH |
714 | |
715 | if (newdyn | |
716 | && newdef | |
717 | && (olddef | |
718 | || (h->root.type == bfd_link_hash_common | |
719 | && (bind == STB_WEAK | |
0525d26e | 720 | || ELF_ST_TYPE (sym->st_info) == STT_FUNC))) |
3e932841 | 721 | && (h->root.type != bfd_link_hash_defweak |
456981d7 | 722 | || dt_needed |
0525d26e | 723 | || bind == STB_WEAK)) |
252b5132 | 724 | { |
b34976b6 AM |
725 | *override = TRUE; |
726 | newdef = FALSE; | |
727 | newdyncommon = FALSE; | |
252b5132 RH |
728 | |
729 | *psec = sec = bfd_und_section_ptr; | |
b34976b6 | 730 | *size_change_ok = TRUE; |
252b5132 RH |
731 | |
732 | /* If we get here when the old symbol is a common symbol, then | |
c44233aa AM |
733 | we are explicitly letting it override a weak symbol or |
734 | function in a dynamic object, and we don't want to warn about | |
735 | a type change. If the old symbol is a defined symbol, a type | |
736 | change warning may still be appropriate. */ | |
252b5132 RH |
737 | |
738 | if (h->root.type == bfd_link_hash_common) | |
b34976b6 | 739 | *type_change_ok = TRUE; |
252b5132 RH |
740 | } |
741 | ||
742 | /* Handle the special case of an old common symbol merging with a | |
743 | new symbol which looks like a common symbol in a shared object. | |
744 | We change *PSEC and *PVALUE to make the new symbol look like a | |
745 | common symbol, and let _bfd_generic_link_add_one_symbol will do | |
746 | the right thing. */ | |
747 | ||
748 | if (newdyncommon | |
749 | && h->root.type == bfd_link_hash_common) | |
750 | { | |
b34976b6 AM |
751 | *override = TRUE; |
752 | newdef = FALSE; | |
753 | newdyncommon = FALSE; | |
252b5132 RH |
754 | *pvalue = sym->st_size; |
755 | *psec = sec = bfd_com_section_ptr; | |
b34976b6 | 756 | *size_change_ok = TRUE; |
252b5132 RH |
757 | } |
758 | ||
759 | /* If the old symbol is from a dynamic object, and the new symbol is | |
760 | a definition which is not from a dynamic object, then the new | |
761 | symbol overrides the old symbol. Symbols from regular files | |
762 | always take precedence over symbols from dynamic objects, even if | |
763 | they are defined after the dynamic object in the link. | |
764 | ||
765 | As above, we again permit a common symbol in a regular object to | |
766 | override a definition in a shared object if the shared object | |
0525d26e ILT |
767 | symbol is a function or is weak. |
768 | ||
769 | As above, we permit a non-weak definition in a shared object to | |
770 | override a weak definition in a regular object. */ | |
252b5132 RH |
771 | |
772 | if (! newdyn | |
773 | && (newdef | |
774 | || (bfd_is_com_section (sec) | |
775 | && (h->root.type == bfd_link_hash_defweak | |
776 | || h->type == STT_FUNC))) | |
777 | && olddyn | |
778 | && olddef | |
0525d26e ILT |
779 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
780 | && (bind != STB_WEAK | |
781 | || h->root.type == bfd_link_hash_defweak)) | |
252b5132 RH |
782 | { |
783 | /* Change the hash table entry to undefined, and let | |
784 | _bfd_generic_link_add_one_symbol do the right thing with the | |
785 | new definition. */ | |
786 | ||
787 | h->root.type = bfd_link_hash_undefined; | |
788 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
b34976b6 | 789 | *size_change_ok = TRUE; |
252b5132 | 790 | |
b34976b6 AM |
791 | olddef = FALSE; |
792 | olddyncommon = FALSE; | |
252b5132 RH |
793 | |
794 | /* We again permit a type change when a common symbol may be | |
c44233aa | 795 | overriding a function. */ |
252b5132 RH |
796 | |
797 | if (bfd_is_com_section (sec)) | |
b34976b6 | 798 | *type_change_ok = TRUE; |
252b5132 RH |
799 | |
800 | /* This union may have been set to be non-NULL when this symbol | |
801 | was seen in a dynamic object. We must force the union to be | |
802 | NULL, so that it is correct for a regular symbol. */ | |
803 | ||
804 | h->verinfo.vertree = NULL; | |
805 | ||
806 | /* In this special case, if H is the target of an indirection, | |
c44233aa AM |
807 | we want the caller to frob with H rather than with the |
808 | indirect symbol. That will permit the caller to redefine the | |
809 | target of the indirection, rather than the indirect symbol | |
810 | itself. FIXME: This will break the -y option if we store a | |
811 | symbol with a different name. */ | |
252b5132 RH |
812 | *sym_hash = h; |
813 | } | |
814 | ||
815 | /* Handle the special case of a new common symbol merging with an | |
816 | old symbol that looks like it might be a common symbol defined in | |
817 | a shared object. Note that we have already handled the case in | |
818 | which a new common symbol should simply override the definition | |
819 | in the shared library. */ | |
820 | ||
821 | if (! newdyn | |
822 | && bfd_is_com_section (sec) | |
823 | && olddyncommon) | |
824 | { | |
825 | /* It would be best if we could set the hash table entry to a | |
826 | common symbol, but we don't know what to use for the section | |
827 | or the alignment. */ | |
828 | if (! ((*info->callbacks->multiple_common) | |
829 | (info, h->root.root.string, oldbfd, bfd_link_hash_common, | |
830 | h->size, abfd, bfd_link_hash_common, sym->st_size))) | |
b34976b6 | 831 | return FALSE; |
252b5132 RH |
832 | |
833 | /* If the predumed common symbol in the dynamic object is | |
c44233aa | 834 | larger, pretend that the new symbol has its size. */ |
252b5132 RH |
835 | |
836 | if (h->size > *pvalue) | |
837 | *pvalue = h->size; | |
838 | ||
839 | /* FIXME: We no longer know the alignment required by the symbol | |
840 | in the dynamic object, so we just wind up using the one from | |
841 | the regular object. */ | |
842 | ||
b34976b6 AM |
843 | olddef = FALSE; |
844 | olddyncommon = FALSE; | |
252b5132 RH |
845 | |
846 | h->root.type = bfd_link_hash_undefined; | |
847 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
848 | ||
b34976b6 AM |
849 | *size_change_ok = TRUE; |
850 | *type_change_ok = TRUE; | |
252b5132 RH |
851 | |
852 | h->verinfo.vertree = NULL; | |
853 | } | |
854 | ||
0525d26e ILT |
855 | /* Handle the special case of a weak definition in a regular object |
856 | followed by a non-weak definition in a shared object. In this | |
456981d7 L |
857 | case, we prefer the definition in the shared object unless it |
858 | comes from a DT_NEEDED entry of a shared object, in which case, | |
3e932841 | 859 | the DT_NEEDED entry may not be required at the run time. */ |
0525d26e | 860 | if (olddef |
456981d7 | 861 | && ! dt_needed |
0525d26e ILT |
862 | && h->root.type == bfd_link_hash_defweak |
863 | && newdef | |
864 | && newdyn | |
865 | && bind != STB_WEAK) | |
b4536acd ILT |
866 | { |
867 | /* To make this work we have to frob the flags so that the rest | |
c44233aa AM |
868 | of the code does not think we are using the regular |
869 | definition. */ | |
64df8d0b ILT |
870 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
871 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
872 | else if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0) | |
873 | h->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC; | |
874 | h->elf_link_hash_flags &= ~ (ELF_LINK_HASH_DEF_REGULAR | |
875 | | ELF_LINK_HASH_DEF_DYNAMIC); | |
b4536acd ILT |
876 | |
877 | /* If H is the target of an indirection, we want the caller to | |
c44233aa AM |
878 | use H rather than the indirect symbol. Otherwise if we are |
879 | defining a new indirect symbol we will wind up attaching it | |
880 | to the entry we are overriding. */ | |
b4536acd ILT |
881 | *sym_hash = h; |
882 | } | |
0525d26e ILT |
883 | |
884 | /* Handle the special case of a non-weak definition in a shared | |
885 | object followed by a weak definition in a regular object. In | |
886 | this case we prefer to definition in the shared object. To make | |
887 | this work we have to tell the caller to not treat the new symbol | |
888 | as a definition. */ | |
889 | if (olddef | |
890 | && olddyn | |
891 | && h->root.type != bfd_link_hash_defweak | |
892 | && newdef | |
893 | && ! newdyn | |
894 | && bind == STB_WEAK) | |
b34976b6 | 895 | *override = TRUE; |
0525d26e | 896 | |
b34976b6 | 897 | return TRUE; |
252b5132 RH |
898 | } |
899 | ||
215007a6 L |
900 | /* This function is called to create an indirect symbol from the |
901 | default for the symbol with the default version if needed. The | |
871da94f | 902 | symbol is described by H, NAME, SYM, PSEC, VALUE, and OVERRIDE. We |
215007a6 L |
903 | set DYNSYM if the new indirect symbol is dynamic. DT_NEEDED |
904 | indicates if it comes from a DT_NEEDED entry of a shared object. */ | |
905 | ||
b34976b6 | 906 | static bfd_boolean |
871da94f | 907 | elf_add_default_symbol (abfd, info, h, name, sym, psec, value, |
215007a6 L |
908 | dynsym, override, dt_needed) |
909 | bfd *abfd; | |
910 | struct bfd_link_info *info; | |
911 | struct elf_link_hash_entry *h; | |
912 | const char *name; | |
913 | Elf_Internal_Sym *sym; | |
871da94f | 914 | asection **psec; |
215007a6 | 915 | bfd_vma *value; |
b34976b6 AM |
916 | bfd_boolean *dynsym; |
917 | bfd_boolean override; | |
918 | bfd_boolean dt_needed; | |
215007a6 | 919 | { |
b34976b6 AM |
920 | bfd_boolean type_change_ok; |
921 | bfd_boolean size_change_ok; | |
215007a6 L |
922 | char *shortname; |
923 | struct elf_link_hash_entry *hi; | |
14a793b2 | 924 | struct bfd_link_hash_entry *bh; |
215007a6 | 925 | struct elf_backend_data *bed; |
b34976b6 AM |
926 | bfd_boolean collect; |
927 | bfd_boolean dynamic; | |
215007a6 | 928 | char *p; |
d4c88bbb | 929 | size_t len, shortlen; |
871da94f | 930 | asection *sec; |
215007a6 L |
931 | |
932 | /* If this symbol has a version, and it is the default version, we | |
933 | create an indirect symbol from the default name to the fully | |
934 | decorated name. This will cause external references which do not | |
935 | specify a version to be bound to this version of the symbol. */ | |
936 | p = strchr (name, ELF_VER_CHR); | |
937 | if (p == NULL || p[1] != ELF_VER_CHR) | |
b34976b6 | 938 | return TRUE; |
215007a6 L |
939 | |
940 | if (override) | |
941 | { | |
942 | /* We are overridden by an old defition. We need to check if we | |
d4c88bbb | 943 | need to create the indirect symbol from the default name. */ |
b34976b6 AM |
944 | hi = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, |
945 | FALSE, FALSE); | |
215007a6 L |
946 | BFD_ASSERT (hi != NULL); |
947 | if (hi == h) | |
b34976b6 | 948 | return TRUE; |
215007a6 L |
949 | while (hi->root.type == bfd_link_hash_indirect |
950 | || hi->root.type == bfd_link_hash_warning) | |
951 | { | |
952 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
953 | if (hi == h) | |
b34976b6 | 954 | return TRUE; |
215007a6 L |
955 | } |
956 | } | |
957 | ||
958 | bed = get_elf_backend_data (abfd); | |
959 | collect = bed->collect; | |
960 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
961 | ||
d4c88bbb AM |
962 | shortlen = p - name; |
963 | shortname = bfd_hash_allocate (&info->hash->table, shortlen + 1); | |
215007a6 | 964 | if (shortname == NULL) |
b34976b6 | 965 | return FALSE; |
d4c88bbb AM |
966 | memcpy (shortname, name, shortlen); |
967 | shortname[shortlen] = '\0'; | |
215007a6 L |
968 | |
969 | /* We are going to create a new symbol. Merge it with any existing | |
970 | symbol with this name. For the purposes of the merge, act as | |
971 | though we were defining the symbol we just defined, although we | |
972 | actually going to define an indirect symbol. */ | |
b34976b6 AM |
973 | type_change_ok = FALSE; |
974 | size_change_ok = FALSE; | |
871da94f L |
975 | sec = *psec; |
976 | if (! elf_merge_symbol (abfd, info, shortname, sym, &sec, value, | |
215007a6 L |
977 | &hi, &override, &type_change_ok, |
978 | &size_change_ok, dt_needed)) | |
b34976b6 | 979 | return FALSE; |
215007a6 L |
980 | |
981 | if (! override) | |
982 | { | |
14a793b2 | 983 | bh = &hi->root; |
215007a6 L |
984 | if (! (_bfd_generic_link_add_one_symbol |
985 | (info, abfd, shortname, BSF_INDIRECT, bfd_ind_section_ptr, | |
b34976b6 AM |
986 | (bfd_vma) 0, name, FALSE, collect, &bh))) |
987 | return FALSE; | |
14a793b2 | 988 | hi = (struct elf_link_hash_entry *) bh; |
215007a6 L |
989 | } |
990 | else | |
991 | { | |
992 | /* In this case the symbol named SHORTNAME is overriding the | |
993 | indirect symbol we want to add. We were planning on making | |
994 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
995 | is the name without a version. NAME is the fully versioned | |
996 | name, and it is the default version. | |
997 | ||
998 | Overriding means that we already saw a definition for the | |
999 | symbol SHORTNAME in a regular object, and it is overriding | |
1000 | the symbol defined in the dynamic object. | |
1001 | ||
1002 | When this happens, we actually want to change NAME, the | |
1003 | symbol we just added, to refer to SHORTNAME. This will cause | |
1004 | references to NAME in the shared object to become references | |
1005 | to SHORTNAME in the regular object. This is what we expect | |
1006 | when we override a function in a shared object: that the | |
1007 | references in the shared object will be mapped to the | |
1008 | definition in the regular object. */ | |
1009 | ||
1010 | while (hi->root.type == bfd_link_hash_indirect | |
1011 | || hi->root.type == bfd_link_hash_warning) | |
1012 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1013 | ||
1014 | h->root.type = bfd_link_hash_indirect; | |
1015 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
1016 | if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) | |
1017 | { | |
1018 | h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEF_DYNAMIC; | |
1019 | hi->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC; | |
1020 | if (hi->elf_link_hash_flags | |
1021 | & (ELF_LINK_HASH_REF_REGULAR | |
1022 | | ELF_LINK_HASH_DEF_REGULAR)) | |
1023 | { | |
1024 | if (! _bfd_elf_link_record_dynamic_symbol (info, hi)) | |
b34976b6 | 1025 | return FALSE; |
215007a6 L |
1026 | } |
1027 | } | |
1028 | ||
1029 | /* Now set HI to H, so that the following code will set the | |
c44233aa | 1030 | other fields correctly. */ |
215007a6 L |
1031 | hi = h; |
1032 | } | |
1033 | ||
1034 | /* If there is a duplicate definition somewhere, then HI may not | |
1035 | point to an indirect symbol. We will have reported an error to | |
1036 | the user in that case. */ | |
1037 | ||
1038 | if (hi->root.type == bfd_link_hash_indirect) | |
1039 | { | |
1040 | struct elf_link_hash_entry *ht; | |
1041 | ||
1042 | /* If the symbol became indirect, then we assume that we have | |
1043 | not seen a definition before. */ | |
1044 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1045 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1046 | | ELF_LINK_HASH_DEF_REGULAR)) == 0); | |
1047 | ||
1048 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
b48fa14c | 1049 | (*bed->elf_backend_copy_indirect_symbol) (bed, ht, hi); |
215007a6 L |
1050 | |
1051 | /* See if the new flags lead us to realize that the symbol must | |
1052 | be dynamic. */ | |
1053 | if (! *dynsym) | |
1054 | { | |
1055 | if (! dynamic) | |
1056 | { | |
1057 | if (info->shared | |
1058 | || ((hi->elf_link_hash_flags | |
1059 | & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
b34976b6 | 1060 | *dynsym = TRUE; |
215007a6 L |
1061 | } |
1062 | else | |
1063 | { | |
1064 | if ((hi->elf_link_hash_flags | |
1065 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
b34976b6 | 1066 | *dynsym = TRUE; |
215007a6 L |
1067 | } |
1068 | } | |
1069 | } | |
1070 | ||
1071 | /* We also need to define an indirection from the nondefault version | |
1072 | of the symbol. */ | |
1073 | ||
d4c88bbb AM |
1074 | len = strlen (name); |
1075 | shortname = bfd_hash_allocate (&info->hash->table, len); | |
215007a6 | 1076 | if (shortname == NULL) |
b34976b6 | 1077 | return FALSE; |
d4c88bbb AM |
1078 | memcpy (shortname, name, shortlen); |
1079 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
215007a6 L |
1080 | |
1081 | /* Once again, merge with any existing symbol. */ | |
b34976b6 AM |
1082 | type_change_ok = FALSE; |
1083 | size_change_ok = FALSE; | |
871da94f L |
1084 | sec = *psec; |
1085 | if (! elf_merge_symbol (abfd, info, shortname, sym, &sec, value, | |
215007a6 L |
1086 | &hi, &override, &type_change_ok, |
1087 | &size_change_ok, dt_needed)) | |
b34976b6 | 1088 | return FALSE; |
215007a6 L |
1089 | |
1090 | if (override) | |
1091 | { | |
1092 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
d8bbe778 L |
1093 | the type of override we do in the case above unless it is |
1094 | overridden by a versioned definiton. */ | |
1095 | if (hi->root.type != bfd_link_hash_defined | |
1096 | && hi->root.type != bfd_link_hash_defweak) | |
1097 | (*_bfd_error_handler) | |
1098 | (_("%s: warning: unexpected redefinition of indirect versioned symbol `%s'"), | |
1099 | bfd_archive_filename (abfd), shortname); | |
215007a6 L |
1100 | } |
1101 | else | |
1102 | { | |
14a793b2 | 1103 | bh = &hi->root; |
215007a6 L |
1104 | if (! (_bfd_generic_link_add_one_symbol |
1105 | (info, abfd, shortname, BSF_INDIRECT, | |
b34976b6 AM |
1106 | bfd_ind_section_ptr, (bfd_vma) 0, name, FALSE, collect, &bh))) |
1107 | return FALSE; | |
14a793b2 | 1108 | hi = (struct elf_link_hash_entry *) bh; |
215007a6 L |
1109 | |
1110 | /* If there is a duplicate definition somewhere, then HI may not | |
1111 | point to an indirect symbol. We will have reported an error | |
1112 | to the user in that case. */ | |
1113 | ||
1114 | if (hi->root.type == bfd_link_hash_indirect) | |
1115 | { | |
1116 | /* If the symbol became indirect, then we assume that we have | |
1117 | not seen a definition before. */ | |
1118 | BFD_ASSERT ((hi->elf_link_hash_flags | |
1119 | & (ELF_LINK_HASH_DEF_DYNAMIC | |
1120 | | ELF_LINK_HASH_DEF_REGULAR)) == 0); | |
1121 | ||
b48fa14c | 1122 | (*bed->elf_backend_copy_indirect_symbol) (bed, h, hi); |
215007a6 L |
1123 | |
1124 | /* See if the new flags lead us to realize that the symbol | |
1125 | must be dynamic. */ | |
1126 | if (! *dynsym) | |
1127 | { | |
1128 | if (! dynamic) | |
1129 | { | |
1130 | if (info->shared | |
1131 | || ((hi->elf_link_hash_flags | |
1132 | & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
b34976b6 | 1133 | *dynsym = TRUE; |
215007a6 L |
1134 | } |
1135 | else | |
1136 | { | |
1137 | if ((hi->elf_link_hash_flags | |
1138 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
b34976b6 | 1139 | *dynsym = TRUE; |
215007a6 L |
1140 | } |
1141 | } | |
1142 | } | |
1143 | } | |
1144 | ||
b34976b6 | 1145 | return TRUE; |
215007a6 L |
1146 | } |
1147 | ||
252b5132 RH |
1148 | /* Add symbols from an ELF object file to the linker hash table. */ |
1149 | ||
b34976b6 | 1150 | static bfd_boolean |
252b5132 RH |
1151 | elf_link_add_object_symbols (abfd, info) |
1152 | bfd *abfd; | |
1153 | struct bfd_link_info *info; | |
1154 | { | |
b34976b6 AM |
1155 | bfd_boolean (*add_symbol_hook) |
1156 | PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *, | |
1157 | const char **, flagword *, asection **, bfd_vma *)); | |
1158 | bfd_boolean (*check_relocs) | |
1159 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
1160 | const Elf_Internal_Rela *)); | |
1161 | bfd_boolean collect; | |
252b5132 | 1162 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
1163 | bfd_size_type symcount; |
1164 | bfd_size_type extsymcount; | |
1165 | bfd_size_type extsymoff; | |
252b5132 | 1166 | struct elf_link_hash_entry **sym_hash; |
b34976b6 | 1167 | bfd_boolean dynamic; |
252b5132 RH |
1168 | Elf_External_Versym *extversym = NULL; |
1169 | Elf_External_Versym *ever; | |
252b5132 | 1170 | struct elf_link_hash_entry *weaks; |
9147e853 JJ |
1171 | struct elf_link_hash_entry **nondeflt_vers = NULL; |
1172 | bfd_size_type nondeflt_vers_cnt = 0; | |
6cdc0ccc AM |
1173 | Elf_Internal_Sym *isymbuf = NULL; |
1174 | Elf_Internal_Sym *isym; | |
1175 | Elf_Internal_Sym *isymend; | |
c61b8717 | 1176 | struct elf_backend_data *bed; |
b34976b6 | 1177 | bfd_boolean dt_needed; |
8ea2e4bd | 1178 | struct elf_link_hash_table * hash_table; |
dc810e39 | 1179 | bfd_size_type amt; |
8ea2e4bd NC |
1180 | |
1181 | hash_table = elf_hash_table (info); | |
252b5132 | 1182 | |
c61b8717 RH |
1183 | bed = get_elf_backend_data (abfd); |
1184 | add_symbol_hook = bed->elf_add_symbol_hook; | |
1185 | collect = bed->collect; | |
252b5132 RH |
1186 | |
1187 | if ((abfd->flags & DYNAMIC) == 0) | |
b34976b6 | 1188 | dynamic = FALSE; |
252b5132 RH |
1189 | else |
1190 | { | |
b34976b6 | 1191 | dynamic = TRUE; |
252b5132 RH |
1192 | |
1193 | /* You can't use -r against a dynamic object. Also, there's no | |
1194 | hope of using a dynamic object which does not exactly match | |
1195 | the format of the output file. */ | |
1196 | if (info->relocateable || info->hash->creator != abfd->xvec) | |
1197 | { | |
1198 | bfd_set_error (bfd_error_invalid_operation); | |
1199 | goto error_return; | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | /* As a GNU extension, any input sections which are named | |
1204 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
1205 | symbol. This differs from .gnu.warning sections, which generate | |
1206 | warnings when they are included in an output file. */ | |
1207 | if (! info->shared) | |
1208 | { | |
1209 | asection *s; | |
1210 | ||
1211 | for (s = abfd->sections; s != NULL; s = s->next) | |
1212 | { | |
1213 | const char *name; | |
1214 | ||
1215 | name = bfd_get_section_name (abfd, s); | |
1216 | if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0) | |
1217 | { | |
1218 | char *msg; | |
1219 | bfd_size_type sz; | |
1220 | ||
1221 | name += sizeof ".gnu.warning." - 1; | |
1222 | ||
1223 | /* If this is a shared object, then look up the symbol | |
1224 | in the hash table. If it is there, and it is already | |
1225 | been defined, then we will not be using the entry | |
1226 | from this shared object, so we don't need to warn. | |
1227 | FIXME: If we see the definition in a regular object | |
1228 | later on, we will warn, but we shouldn't. The only | |
1229 | fix is to keep track of what warnings we are supposed | |
1230 | to emit, and then handle them all at the end of the | |
1231 | link. */ | |
1232 | if (dynamic && abfd->xvec == info->hash->creator) | |
1233 | { | |
1234 | struct elf_link_hash_entry *h; | |
1235 | ||
8ea2e4bd | 1236 | h = elf_link_hash_lookup (hash_table, name, |
b34976b6 | 1237 | FALSE, FALSE, TRUE); |
252b5132 RH |
1238 | |
1239 | /* FIXME: What about bfd_link_hash_common? */ | |
1240 | if (h != NULL | |
1241 | && (h->root.type == bfd_link_hash_defined | |
1242 | || h->root.type == bfd_link_hash_defweak)) | |
1243 | { | |
1244 | /* We don't want to issue this warning. Clobber | |
c44233aa AM |
1245 | the section size so that the warning does not |
1246 | get copied into the output file. */ | |
252b5132 RH |
1247 | s->_raw_size = 0; |
1248 | continue; | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | sz = bfd_section_size (abfd, s); | |
1253 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
1254 | if (msg == NULL) | |
1255 | goto error_return; | |
1256 | ||
1257 | if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz)) | |
1258 | goto error_return; | |
1259 | ||
1260 | msg[sz] = '\0'; | |
1261 | ||
1262 | if (! (_bfd_generic_link_add_one_symbol | |
1263 | (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg, | |
b34976b6 | 1264 | FALSE, collect, (struct bfd_link_hash_entry **) NULL))) |
252b5132 RH |
1265 | goto error_return; |
1266 | ||
1267 | if (! info->relocateable) | |
1268 | { | |
1269 | /* Clobber the section size so that the warning does | |
c44233aa | 1270 | not get copied into the output file. */ |
252b5132 RH |
1271 | s->_raw_size = 0; |
1272 | } | |
1273 | } | |
1274 | } | |
1275 | } | |
1276 | ||
b34976b6 | 1277 | dt_needed = FALSE; |
252b5132 RH |
1278 | if (! dynamic) |
1279 | { | |
1280 | /* If we are creating a shared library, create all the dynamic | |
c44233aa AM |
1281 | sections immediately. We need to attach them to something, |
1282 | so we attach them to this BFD, provided it is the right | |
1283 | format. FIXME: If there are no input BFD's of the same | |
1284 | format as the output, we can't make a shared library. */ | |
252b5132 | 1285 | if (info->shared |
8ea2e4bd NC |
1286 | && is_elf_hash_table (info) |
1287 | && ! hash_table->dynamic_sections_created | |
252b5132 RH |
1288 | && abfd->xvec == info->hash->creator) |
1289 | { | |
1290 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1291 | goto error_return; | |
1292 | } | |
1293 | } | |
8ea2e4bd NC |
1294 | else if (! is_elf_hash_table (info)) |
1295 | goto error_return; | |
252b5132 RH |
1296 | else |
1297 | { | |
1298 | asection *s; | |
b34976b6 | 1299 | bfd_boolean add_needed; |
252b5132 RH |
1300 | const char *name; |
1301 | bfd_size_type oldsize; | |
1302 | bfd_size_type strindex; | |
5d603aa9 | 1303 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
252b5132 | 1304 | |
366f2964 AM |
1305 | /* ld --just-symbols and dynamic objects don't mix very well. |
1306 | Test for --just-symbols by looking at info set up by | |
1307 | _bfd_elf_link_just_syms. */ | |
1308 | if ((s = abfd->sections) != NULL | |
68bfbfcc | 1309 | && s->sec_info_type == ELF_INFO_TYPE_JUST_SYMS) |
366f2964 AM |
1310 | goto error_return; |
1311 | ||
252b5132 RH |
1312 | /* Find the name to use in a DT_NEEDED entry that refers to this |
1313 | object. If the object has a DT_SONAME entry, we use it. | |
1314 | Otherwise, if the generic linker stuck something in | |
1315 | elf_dt_name, we use that. Otherwise, we just use the file | |
1316 | name. If the generic linker put a null string into | |
1317 | elf_dt_name, we don't make a DT_NEEDED entry at all, even if | |
1318 | there is a DT_SONAME entry. */ | |
b34976b6 | 1319 | add_needed = TRUE; |
7913c838 | 1320 | name = bfd_get_filename (abfd); |
252b5132 RH |
1321 | if (elf_dt_name (abfd) != NULL) |
1322 | { | |
1323 | name = elf_dt_name (abfd); | |
1324 | if (*name == '\0') | |
74816898 L |
1325 | { |
1326 | if (elf_dt_soname (abfd) != NULL) | |
b34976b6 | 1327 | dt_needed = TRUE; |
74816898 | 1328 | |
b34976b6 | 1329 | add_needed = FALSE; |
74816898 | 1330 | } |
252b5132 RH |
1331 | } |
1332 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
1333 | if (s != NULL) | |
1334 | { | |
6cdc0ccc | 1335 | Elf_External_Dyn *dynbuf = NULL; |
252b5132 RH |
1336 | Elf_External_Dyn *extdyn; |
1337 | Elf_External_Dyn *extdynend; | |
1338 | int elfsec; | |
dc810e39 | 1339 | unsigned long shlink; |
252b5132 | 1340 | |
dc810e39 | 1341 | dynbuf = (Elf_External_Dyn *) bfd_malloc (s->_raw_size); |
252b5132 RH |
1342 | if (dynbuf == NULL) |
1343 | goto error_return; | |
1344 | ||
1345 | if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf, | |
1346 | (file_ptr) 0, s->_raw_size)) | |
6cdc0ccc | 1347 | goto error_free_dyn; |
252b5132 RH |
1348 | |
1349 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
1350 | if (elfsec == -1) | |
6cdc0ccc | 1351 | goto error_free_dyn; |
dc810e39 | 1352 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; |
252b5132 RH |
1353 | |
1354 | extdyn = dynbuf; | |
1355 | extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn); | |
1356 | for (; extdyn < extdynend; extdyn++) | |
1357 | { | |
1358 | Elf_Internal_Dyn dyn; | |
1359 | ||
1360 | elf_swap_dyn_in (abfd, extdyn, &dyn); | |
1361 | if (dyn.d_tag == DT_SONAME) | |
1362 | { | |
dc810e39 AM |
1363 | unsigned int tagv = dyn.d_un.d_val; |
1364 | name = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1365 | if (name == NULL) |
6cdc0ccc | 1366 | goto error_free_dyn; |
252b5132 RH |
1367 | } |
1368 | if (dyn.d_tag == DT_NEEDED) | |
1369 | { | |
1370 | struct bfd_link_needed_list *n, **pn; | |
1371 | char *fnm, *anm; | |
dc810e39 | 1372 | unsigned int tagv = dyn.d_un.d_val; |
252b5132 | 1373 | |
dc810e39 AM |
1374 | amt = sizeof (struct bfd_link_needed_list); |
1375 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1376 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
252b5132 | 1377 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1378 | goto error_free_dyn; |
d4c88bbb AM |
1379 | amt = strlen (fnm) + 1; |
1380 | anm = bfd_alloc (abfd, amt); | |
252b5132 | 1381 | if (anm == NULL) |
6cdc0ccc | 1382 | goto error_free_dyn; |
d4c88bbb | 1383 | memcpy (anm, fnm, (size_t) amt); |
252b5132 RH |
1384 | n->name = anm; |
1385 | n->by = abfd; | |
1386 | n->next = NULL; | |
8ea2e4bd | 1387 | for (pn = & hash_table->needed; |
252b5132 RH |
1388 | *pn != NULL; |
1389 | pn = &(*pn)->next) | |
1390 | ; | |
1391 | *pn = n; | |
1392 | } | |
a963dc6a L |
1393 | if (dyn.d_tag == DT_RUNPATH) |
1394 | { | |
1395 | struct bfd_link_needed_list *n, **pn; | |
1396 | char *fnm, *anm; | |
dc810e39 | 1397 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a | 1398 | |
dc810e39 AM |
1399 | amt = sizeof (struct bfd_link_needed_list); |
1400 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1401 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1402 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1403 | goto error_free_dyn; |
d4c88bbb AM |
1404 | amt = strlen (fnm) + 1; |
1405 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1406 | if (anm == NULL) |
6cdc0ccc | 1407 | goto error_free_dyn; |
d4c88bbb | 1408 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1409 | n->name = anm; |
1410 | n->by = abfd; | |
1411 | n->next = NULL; | |
5d603aa9 | 1412 | for (pn = & runpath; |
a963dc6a L |
1413 | *pn != NULL; |
1414 | pn = &(*pn)->next) | |
1415 | ; | |
1416 | *pn = n; | |
a963dc6a | 1417 | } |
3e932841 | 1418 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ |
a963dc6a | 1419 | if (!runpath && dyn.d_tag == DT_RPATH) |
c44233aa | 1420 | { |
a963dc6a L |
1421 | struct bfd_link_needed_list *n, **pn; |
1422 | char *fnm, *anm; | |
dc810e39 | 1423 | unsigned int tagv = dyn.d_un.d_val; |
a963dc6a | 1424 | |
dc810e39 AM |
1425 | amt = sizeof (struct bfd_link_needed_list); |
1426 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); | |
1427 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
a963dc6a | 1428 | if (n == NULL || fnm == NULL) |
6cdc0ccc | 1429 | goto error_free_dyn; |
d4c88bbb AM |
1430 | amt = strlen (fnm) + 1; |
1431 | anm = bfd_alloc (abfd, amt); | |
a963dc6a | 1432 | if (anm == NULL) |
6cdc0ccc AM |
1433 | { |
1434 | error_free_dyn: | |
1435 | free (dynbuf); | |
1436 | goto error_return; | |
1437 | } | |
d4c88bbb | 1438 | memcpy (anm, fnm, (size_t) amt); |
a963dc6a L |
1439 | n->name = anm; |
1440 | n->by = abfd; | |
1441 | n->next = NULL; | |
5d603aa9 | 1442 | for (pn = & rpath; |
a963dc6a L |
1443 | *pn != NULL; |
1444 | pn = &(*pn)->next) | |
1445 | ; | |
1446 | *pn = n; | |
a963dc6a | 1447 | } |
252b5132 RH |
1448 | } |
1449 | ||
1450 | free (dynbuf); | |
252b5132 RH |
1451 | } |
1452 | ||
5d603aa9 L |
1453 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that |
1454 | frees all more recently bfd_alloc'd blocks as well. */ | |
1455 | if (runpath) | |
1456 | rpath = runpath; | |
1457 | ||
1458 | if (rpath) | |
1459 | { | |
1460 | struct bfd_link_needed_list **pn; | |
1461 | for (pn = & hash_table->runpath; | |
1462 | *pn != NULL; | |
1463 | pn = &(*pn)->next) | |
1464 | ; | |
1465 | *pn = rpath; | |
1466 | } | |
1467 | ||
252b5132 RH |
1468 | /* We do not want to include any of the sections in a dynamic |
1469 | object in the output file. We hack by simply clobbering the | |
1470 | list of sections in the BFD. This could be handled more | |
1471 | cleanly by, say, a new section flag; the existing | |
1472 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
1473 | still implies that the section takes up space in the output | |
1474 | file. */ | |
c601ffdb | 1475 | bfd_section_list_clear (abfd); |
252b5132 RH |
1476 | |
1477 | /* If this is the first dynamic object found in the link, create | |
1478 | the special sections required for dynamic linking. */ | |
8ea2e4bd NC |
1479 | if (! hash_table->dynamic_sections_created) |
1480 | if (! elf_link_create_dynamic_sections (abfd, info)) | |
1481 | goto error_return; | |
252b5132 RH |
1482 | |
1483 | if (add_needed) | |
1484 | { | |
1485 | /* Add a DT_NEEDED entry for this dynamic object. */ | |
2b0f7ef9 | 1486 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
b34976b6 | 1487 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, name, FALSE); |
252b5132 RH |
1488 | if (strindex == (bfd_size_type) -1) |
1489 | goto error_return; | |
1490 | ||
2b0f7ef9 | 1491 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
252b5132 RH |
1492 | { |
1493 | asection *sdyn; | |
1494 | Elf_External_Dyn *dyncon, *dynconend; | |
1495 | ||
1496 | /* The hash table size did not change, which means that | |
1497 | the dynamic object name was already entered. If we | |
1498 | have already included this dynamic object in the | |
1499 | link, just ignore it. There is no reason to include | |
1500 | a particular dynamic object more than once. */ | |
8ea2e4bd | 1501 | sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic"); |
252b5132 RH |
1502 | BFD_ASSERT (sdyn != NULL); |
1503 | ||
1504 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
1505 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
1506 | sdyn->_raw_size); | |
1507 | for (; dyncon < dynconend; dyncon++) | |
1508 | { | |
1509 | Elf_Internal_Dyn dyn; | |
1510 | ||
8ea2e4bd | 1511 | elf_swap_dyn_in (hash_table->dynobj, dyncon, & dyn); |
252b5132 RH |
1512 | if (dyn.d_tag == DT_NEEDED |
1513 | && dyn.d_un.d_val == strindex) | |
1514 | { | |
2b0f7ef9 | 1515 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); |
b34976b6 | 1516 | return TRUE; |
252b5132 RH |
1517 | } |
1518 | } | |
1519 | } | |
1520 | ||
dc810e39 | 1521 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
252b5132 RH |
1522 | goto error_return; |
1523 | } | |
1524 | ||
1525 | /* Save the SONAME, if there is one, because sometimes the | |
c44233aa | 1526 | linker emulation code will need to know it. */ |
252b5132 | 1527 | if (*name == '\0') |
210ba1e8 | 1528 | name = basename (bfd_get_filename (abfd)); |
252b5132 RH |
1529 | elf_dt_name (abfd) = name; |
1530 | } | |
1531 | ||
6cdc0ccc AM |
1532 | /* If this is a dynamic object, we always link against the .dynsym |
1533 | symbol table, not the .symtab symbol table. The dynamic linker | |
1534 | will only see the .dynsym symbol table, so there is no reason to | |
1535 | look at .symtab for a dynamic object. */ | |
1536 | ||
1537 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
1538 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
1539 | else | |
1540 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
1541 | ||
1542 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
1543 | ||
1544 | /* The sh_info field of the symtab header tells us where the | |
1545 | external symbols start. We don't care about the local symbols at | |
1546 | this point. */ | |
1547 | if (elf_bad_symtab (abfd)) | |
1548 | { | |
1549 | extsymcount = symcount; | |
1550 | extsymoff = 0; | |
1551 | } | |
1552 | else | |
1553 | { | |
1554 | extsymcount = symcount - hdr->sh_info; | |
1555 | extsymoff = hdr->sh_info; | |
1556 | } | |
252b5132 | 1557 | |
6cdc0ccc AM |
1558 | sym_hash = NULL; |
1559 | if (extsymcount != 0) | |
9ad5cbcf | 1560 | { |
6cdc0ccc AM |
1561 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, |
1562 | NULL, NULL, NULL); | |
1563 | if (isymbuf == NULL) | |
9ad5cbcf | 1564 | goto error_return; |
6cdc0ccc AM |
1565 | |
1566 | /* We store a pointer to the hash table entry for each external | |
1567 | symbol. */ | |
1568 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
1569 | sym_hash = (struct elf_link_hash_entry **) bfd_alloc (abfd, amt); | |
1570 | if (sym_hash == NULL) | |
1571 | goto error_free_sym; | |
1572 | elf_sym_hashes (abfd) = sym_hash; | |
1573 | } | |
1574 | ||
1575 | if (dynamic) | |
1576 | { | |
1577 | /* Read in any version definitions. */ | |
1578 | if (! _bfd_elf_slurp_version_tables (abfd)) | |
1579 | goto error_free_sym; | |
1580 | ||
1581 | /* Read in the symbol versions, but don't bother to convert them | |
1582 | to internal format. */ | |
1583 | if (elf_dynversym (abfd) != 0) | |
1584 | { | |
1585 | Elf_Internal_Shdr *versymhdr; | |
1586 | ||
1587 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
1588 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
1589 | if (extversym == NULL) | |
1590 | goto error_free_sym; | |
1591 | amt = versymhdr->sh_size; | |
1592 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
1593 | || bfd_bread ((PTR) extversym, amt, abfd) != amt) | |
1594 | goto error_free_vers; | |
1595 | } | |
9ad5cbcf AM |
1596 | } |
1597 | ||
252b5132 RH |
1598 | weaks = NULL; |
1599 | ||
1600 | ever = extversym != NULL ? extversym + extsymoff : NULL; | |
6cdc0ccc AM |
1601 | for (isym = isymbuf, isymend = isymbuf + extsymcount; |
1602 | isym < isymend; | |
1603 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
252b5132 | 1604 | { |
252b5132 RH |
1605 | int bind; |
1606 | bfd_vma value; | |
1607 | asection *sec; | |
1608 | flagword flags; | |
1609 | const char *name; | |
1610 | struct elf_link_hash_entry *h; | |
b34976b6 AM |
1611 | bfd_boolean definition; |
1612 | bfd_boolean size_change_ok, type_change_ok; | |
1613 | bfd_boolean new_weakdef; | |
252b5132 | 1614 | unsigned int old_alignment; |
b34976b6 | 1615 | bfd_boolean override; |
215007a6 | 1616 | |
b34976b6 | 1617 | override = FALSE; |
252b5132 | 1618 | |
252b5132 RH |
1619 | flags = BSF_NO_FLAGS; |
1620 | sec = NULL; | |
6cdc0ccc | 1621 | value = isym->st_value; |
252b5132 RH |
1622 | *sym_hash = NULL; |
1623 | ||
6cdc0ccc | 1624 | bind = ELF_ST_BIND (isym->st_info); |
252b5132 RH |
1625 | if (bind == STB_LOCAL) |
1626 | { | |
1627 | /* This should be impossible, since ELF requires that all | |
1628 | global symbols follow all local symbols, and that sh_info | |
1629 | point to the first global symbol. Unfortunatealy, Irix 5 | |
1630 | screws this up. */ | |
1631 | continue; | |
1632 | } | |
1633 | else if (bind == STB_GLOBAL) | |
1634 | { | |
6cdc0ccc AM |
1635 | if (isym->st_shndx != SHN_UNDEF |
1636 | && isym->st_shndx != SHN_COMMON) | |
252b5132 | 1637 | flags = BSF_GLOBAL; |
252b5132 RH |
1638 | } |
1639 | else if (bind == STB_WEAK) | |
1640 | flags = BSF_WEAK; | |
1641 | else | |
1642 | { | |
1643 | /* Leave it up to the processor backend. */ | |
1644 | } | |
1645 | ||
6cdc0ccc | 1646 | if (isym->st_shndx == SHN_UNDEF) |
252b5132 | 1647 | sec = bfd_und_section_ptr; |
6cdc0ccc | 1648 | else if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 | 1649 | { |
6cdc0ccc | 1650 | sec = section_from_elf_index (abfd, isym->st_shndx); |
252b5132 RH |
1651 | if (sec == NULL) |
1652 | sec = bfd_abs_section_ptr; | |
1653 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) | |
1654 | value -= sec->vma; | |
1655 | } | |
6cdc0ccc | 1656 | else if (isym->st_shndx == SHN_ABS) |
252b5132 | 1657 | sec = bfd_abs_section_ptr; |
6cdc0ccc | 1658 | else if (isym->st_shndx == SHN_COMMON) |
252b5132 RH |
1659 | { |
1660 | sec = bfd_com_section_ptr; | |
1661 | /* What ELF calls the size we call the value. What ELF | |
1662 | calls the value we call the alignment. */ | |
6cdc0ccc | 1663 | value = isym->st_size; |
252b5132 RH |
1664 | } |
1665 | else | |
1666 | { | |
1667 | /* Leave it up to the processor backend. */ | |
1668 | } | |
1669 | ||
6cdc0ccc AM |
1670 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, |
1671 | isym->st_name); | |
252b5132 | 1672 | if (name == (const char *) NULL) |
6cdc0ccc | 1673 | goto error_free_vers; |
252b5132 | 1674 | |
6cdc0ccc AM |
1675 | if (isym->st_shndx == SHN_COMMON |
1676 | && ELF_ST_TYPE (isym->st_info) == STT_TLS) | |
13ae64f3 JJ |
1677 | { |
1678 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
1679 | ||
1680 | if (tcomm == NULL) | |
1681 | { | |
1682 | tcomm = bfd_make_section (abfd, ".tcommon"); | |
1683 | if (tcomm == NULL | |
1684 | || !bfd_set_section_flags (abfd, tcomm, (SEC_ALLOC | |
1685 | | SEC_IS_COMMON | |
1686 | | SEC_LINKER_CREATED | |
1687 | | SEC_THREAD_LOCAL))) | |
6cdc0ccc | 1688 | goto error_free_vers; |
13ae64f3 JJ |
1689 | } |
1690 | sec = tcomm; | |
1691 | } | |
1692 | else if (add_symbol_hook) | |
252b5132 | 1693 | { |
6cdc0ccc | 1694 | if (! (*add_symbol_hook) (abfd, info, isym, &name, &flags, &sec, |
252b5132 | 1695 | &value)) |
6cdc0ccc | 1696 | goto error_free_vers; |
252b5132 RH |
1697 | |
1698 | /* The hook function sets the name to NULL if this symbol | |
1699 | should be skipped for some reason. */ | |
1700 | if (name == (const char *) NULL) | |
1701 | continue; | |
1702 | } | |
1703 | ||
1704 | /* Sanity check that all possibilities were handled. */ | |
1705 | if (sec == (asection *) NULL) | |
1706 | { | |
1707 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1708 | goto error_free_vers; |
252b5132 RH |
1709 | } |
1710 | ||
1711 | if (bfd_is_und_section (sec) | |
1712 | || bfd_is_com_section (sec)) | |
b34976b6 | 1713 | definition = FALSE; |
252b5132 | 1714 | else |
b34976b6 | 1715 | definition = TRUE; |
252b5132 | 1716 | |
b34976b6 | 1717 | size_change_ok = FALSE; |
252b5132 RH |
1718 | type_change_ok = get_elf_backend_data (abfd)->type_change_ok; |
1719 | old_alignment = 0; | |
1720 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1721 | { | |
1722 | Elf_Internal_Versym iver; | |
1723 | unsigned int vernum = 0; | |
252b5132 RH |
1724 | |
1725 | if (ever != NULL) | |
1726 | { | |
1727 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
1728 | vernum = iver.vs_vers & VERSYM_VERSION; | |
1729 | ||
1730 | /* If this is a hidden symbol, or if it is not version | |
c44233aa AM |
1731 | 1, we append the version name to the symbol name. |
1732 | However, we do not modify a non-hidden absolute | |
1733 | symbol, because it might be the version symbol | |
1734 | itself. FIXME: What if it isn't? */ | |
252b5132 RH |
1735 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
1736 | || (vernum > 1 && ! bfd_is_abs_section (sec))) | |
1737 | { | |
1738 | const char *verstr; | |
d4c88bbb | 1739 | size_t namelen, verlen, newlen; |
252b5132 RH |
1740 | char *newname, *p; |
1741 | ||
6cdc0ccc | 1742 | if (isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1743 | { |
1744 | if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info) | |
1745 | { | |
1746 | (*_bfd_error_handler) | |
1747 | (_("%s: %s: invalid version %u (max %d)"), | |
8f615d07 | 1748 | bfd_archive_filename (abfd), name, vernum, |
252b5132 RH |
1749 | elf_tdata (abfd)->dynverdef_hdr.sh_info); |
1750 | bfd_set_error (bfd_error_bad_value); | |
6cdc0ccc | 1751 | goto error_free_vers; |
252b5132 RH |
1752 | } |
1753 | else if (vernum > 1) | |
1754 | verstr = | |
1755 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
1756 | else | |
1757 | verstr = ""; | |
1758 | } | |
1759 | else | |
1760 | { | |
1761 | /* We cannot simply test for the number of | |
1762 | entries in the VERNEED section since the | |
1763 | numbers for the needed versions do not start | |
1764 | at 0. */ | |
1765 | Elf_Internal_Verneed *t; | |
1766 | ||
1767 | verstr = NULL; | |
1768 | for (t = elf_tdata (abfd)->verref; | |
1769 | t != NULL; | |
1770 | t = t->vn_nextref) | |
1771 | { | |
1772 | Elf_Internal_Vernaux *a; | |
1773 | ||
1774 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1775 | { | |
1776 | if (a->vna_other == vernum) | |
1777 | { | |
1778 | verstr = a->vna_nodename; | |
1779 | break; | |
1780 | } | |
1781 | } | |
1782 | if (a != NULL) | |
1783 | break; | |
1784 | } | |
1785 | if (verstr == NULL) | |
1786 | { | |
1787 | (*_bfd_error_handler) | |
1788 | (_("%s: %s: invalid needed version %d"), | |
8f615d07 | 1789 | bfd_archive_filename (abfd), name, vernum); |
252b5132 | 1790 | bfd_set_error (bfd_error_bad_value); |
6cdc0ccc | 1791 | goto error_free_vers; |
252b5132 RH |
1792 | } |
1793 | } | |
1794 | ||
1795 | namelen = strlen (name); | |
d4c88bbb AM |
1796 | verlen = strlen (verstr); |
1797 | newlen = namelen + verlen + 2; | |
1798 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1799 | && isym->st_shndx != SHN_UNDEF) |
252b5132 RH |
1800 | ++newlen; |
1801 | ||
d4c88bbb | 1802 | newname = (char *) bfd_alloc (abfd, (bfd_size_type) newlen); |
252b5132 | 1803 | if (newname == NULL) |
6cdc0ccc | 1804 | goto error_free_vers; |
d4c88bbb | 1805 | memcpy (newname, name, namelen); |
252b5132 RH |
1806 | p = newname + namelen; |
1807 | *p++ = ELF_VER_CHR; | |
1287d1cc ILT |
1808 | /* If this is a defined non-hidden version symbol, |
1809 | we add another @ to the name. This indicates the | |
1810 | default version of the symbol. */ | |
1811 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
6cdc0ccc | 1812 | && isym->st_shndx != SHN_UNDEF) |
252b5132 | 1813 | *p++ = ELF_VER_CHR; |
d4c88bbb | 1814 | memcpy (p, verstr, verlen + 1); |
252b5132 RH |
1815 | |
1816 | name = newname; | |
1817 | } | |
1818 | } | |
1819 | ||
6cdc0ccc | 1820 | if (! elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
252b5132 | 1821 | sym_hash, &override, &type_change_ok, |
456981d7 | 1822 | &size_change_ok, dt_needed)) |
6cdc0ccc | 1823 | goto error_free_vers; |
252b5132 RH |
1824 | |
1825 | if (override) | |
b34976b6 | 1826 | definition = FALSE; |
252b5132 RH |
1827 | |
1828 | h = *sym_hash; | |
1829 | while (h->root.type == bfd_link_hash_indirect | |
1830 | || h->root.type == bfd_link_hash_warning) | |
1831 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1832 | ||
1833 | /* Remember the old alignment if this is a common symbol, so | |
c44233aa AM |
1834 | that we don't reduce the alignment later on. We can't |
1835 | check later, because _bfd_generic_link_add_one_symbol | |
1836 | will set a default for the alignment which we want to | |
1837 | override. */ | |
252b5132 RH |
1838 | if (h->root.type == bfd_link_hash_common) |
1839 | old_alignment = h->root.u.c.p->alignment_power; | |
1840 | ||
1841 | if (elf_tdata (abfd)->verdef != NULL | |
1842 | && ! override | |
1843 | && vernum > 1 | |
1844 | && definition) | |
1845 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
1846 | } | |
1847 | ||
1848 | if (! (_bfd_generic_link_add_one_symbol | |
1849 | (info, abfd, name, flags, sec, value, (const char *) NULL, | |
b34976b6 | 1850 | FALSE, collect, (struct bfd_link_hash_entry **) sym_hash))) |
6cdc0ccc | 1851 | goto error_free_vers; |
252b5132 RH |
1852 | |
1853 | h = *sym_hash; | |
1854 | while (h->root.type == bfd_link_hash_indirect | |
1855 | || h->root.type == bfd_link_hash_warning) | |
1856 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1857 | *sym_hash = h; | |
1858 | ||
b34976b6 | 1859 | new_weakdef = FALSE; |
252b5132 RH |
1860 | if (dynamic |
1861 | && definition | |
1862 | && (flags & BSF_WEAK) != 0 | |
6cdc0ccc | 1863 | && ELF_ST_TYPE (isym->st_info) != STT_FUNC |
252b5132 RH |
1864 | && info->hash->creator->flavour == bfd_target_elf_flavour |
1865 | && h->weakdef == NULL) | |
1866 | { | |
1867 | /* Keep a list of all weak defined non function symbols from | |
1868 | a dynamic object, using the weakdef field. Later in this | |
1869 | function we will set the weakdef field to the correct | |
1870 | value. We only put non-function symbols from dynamic | |
1871 | objects on this list, because that happens to be the only | |
1872 | time we need to know the normal symbol corresponding to a | |
1873 | weak symbol, and the information is time consuming to | |
1874 | figure out. If the weakdef field is not already NULL, | |
1875 | then this symbol was already defined by some previous | |
1876 | dynamic object, and we will be using that previous | |
1877 | definition anyhow. */ | |
1878 | ||
1879 | h->weakdef = weaks; | |
1880 | weaks = h; | |
b34976b6 | 1881 | new_weakdef = TRUE; |
252b5132 RH |
1882 | } |
1883 | ||
1884 | /* Set the alignment of a common symbol. */ | |
6cdc0ccc | 1885 | if (isym->st_shndx == SHN_COMMON |
252b5132 RH |
1886 | && h->root.type == bfd_link_hash_common) |
1887 | { | |
1888 | unsigned int align; | |
1889 | ||
6cdc0ccc | 1890 | align = bfd_log2 (isym->st_value); |
724982f6 NC |
1891 | if (align > old_alignment |
1892 | /* Permit an alignment power of zero if an alignment of one | |
1893 | is specified and no other alignments have been specified. */ | |
6cdc0ccc | 1894 | || (isym->st_value == 1 && old_alignment == 0)) |
252b5132 RH |
1895 | h->root.u.c.p->alignment_power = align; |
1896 | } | |
1897 | ||
1898 | if (info->hash->creator->flavour == bfd_target_elf_flavour) | |
1899 | { | |
1900 | int old_flags; | |
b34976b6 | 1901 | bfd_boolean dynsym; |
252b5132 RH |
1902 | int new_flag; |
1903 | ||
1904 | /* Remember the symbol size and type. */ | |
6cdc0ccc | 1905 | if (isym->st_size != 0 |
252b5132 RH |
1906 | && (definition || h->size == 0)) |
1907 | { | |
6cdc0ccc | 1908 | if (h->size != 0 && h->size != isym->st_size && ! size_change_ok) |
252b5132 RH |
1909 | (*_bfd_error_handler) |
1910 | (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"), | |
6cdc0ccc AM |
1911 | name, (unsigned long) h->size, |
1912 | (unsigned long) isym->st_size, bfd_archive_filename (abfd)); | |
252b5132 | 1913 | |
6cdc0ccc | 1914 | h->size = isym->st_size; |
252b5132 RH |
1915 | } |
1916 | ||
1917 | /* If this is a common symbol, then we always want H->SIZE | |
c44233aa AM |
1918 | to be the size of the common symbol. The code just above |
1919 | won't fix the size if a common symbol becomes larger. We | |
1920 | don't warn about a size change here, because that is | |
1921 | covered by --warn-common. */ | |
252b5132 RH |
1922 | if (h->root.type == bfd_link_hash_common) |
1923 | h->size = h->root.u.c.size; | |
1924 | ||
6cdc0ccc | 1925 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE |
252b5132 RH |
1926 | && (definition || h->type == STT_NOTYPE)) |
1927 | { | |
1928 | if (h->type != STT_NOTYPE | |
6cdc0ccc | 1929 | && h->type != ELF_ST_TYPE (isym->st_info) |
252b5132 RH |
1930 | && ! type_change_ok) |
1931 | (*_bfd_error_handler) | |
1932 | (_("Warning: type of symbol `%s' changed from %d to %d in %s"), | |
6cdc0ccc | 1933 | name, h->type, ELF_ST_TYPE (isym->st_info), |
8f615d07 | 1934 | bfd_archive_filename (abfd)); |
252b5132 | 1935 | |
6cdc0ccc | 1936 | h->type = ELF_ST_TYPE (isym->st_info); |
252b5132 RH |
1937 | } |
1938 | ||
7a13edea NC |
1939 | /* If st_other has a processor-specific meaning, specific code |
1940 | might be needed here. */ | |
6cdc0ccc | 1941 | if (isym->st_other != 0) |
7a13edea | 1942 | { |
5941afc1 | 1943 | unsigned char hvis, symvis, other, nvis; |
7c25b72c RH |
1944 | |
1945 | /* Take the balance of OTHER from the definition. */ | |
1946 | other = (definition ? isym->st_other : h->other); | |
1947 | other &= ~ ELF_ST_VISIBILITY (-1); | |
1948 | ||
7a13edea | 1949 | /* Combine visibilities, using the most constraining one. */ |
7c25b72c RH |
1950 | hvis = ELF_ST_VISIBILITY (h->other); |
1951 | symvis = ELF_ST_VISIBILITY (isym->st_other); | |
5941afc1 L |
1952 | if (! hvis) |
1953 | nvis = symvis; | |
1954 | else if (! symvis) | |
1955 | nvis = hvis; | |
1956 | else | |
1957 | nvis = hvis < symvis ? hvis : symvis; | |
7c25b72c | 1958 | |
5941afc1 | 1959 | h->other = other | nvis; |
7a13edea | 1960 | } |
252b5132 RH |
1961 | |
1962 | /* Set a flag in the hash table entry indicating the type of | |
1963 | reference or definition we just found. Keep a count of | |
1964 | the number of dynamic symbols we find. A dynamic symbol | |
1965 | is one which is referenced or defined by both a regular | |
1966 | object and a shared object. */ | |
1967 | old_flags = h->elf_link_hash_flags; | |
b34976b6 | 1968 | dynsym = FALSE; |
252b5132 RH |
1969 | if (! dynamic) |
1970 | { | |
1971 | if (! definition) | |
1972 | { | |
1973 | new_flag = ELF_LINK_HASH_REF_REGULAR; | |
1974 | if (bind != STB_WEAK) | |
1975 | new_flag |= ELF_LINK_HASH_REF_REGULAR_NONWEAK; | |
1976 | } | |
1977 | else | |
1978 | new_flag = ELF_LINK_HASH_DEF_REGULAR; | |
1979 | if (info->shared | |
1980 | || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC | |
1981 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0) | |
b34976b6 | 1982 | dynsym = TRUE; |
252b5132 RH |
1983 | } |
1984 | else | |
1985 | { | |
1986 | if (! definition) | |
1987 | new_flag = ELF_LINK_HASH_REF_DYNAMIC; | |
1988 | else | |
1989 | new_flag = ELF_LINK_HASH_DEF_DYNAMIC; | |
1990 | if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR | |
1991 | | ELF_LINK_HASH_REF_REGULAR)) != 0 | |
1992 | || (h->weakdef != NULL | |
1993 | && ! new_weakdef | |
1994 | && h->weakdef->dynindx != -1)) | |
b34976b6 | 1995 | dynsym = TRUE; |
252b5132 RH |
1996 | } |
1997 | ||
1998 | h->elf_link_hash_flags |= new_flag; | |
1999 | ||
215007a6 L |
2000 | /* Check to see if we need to add an indirect symbol for |
2001 | the default name. */ | |
051b8577 | 2002 | if (definition || h->root.type == bfd_link_hash_common) |
6cdc0ccc | 2003 | if (! elf_add_default_symbol (abfd, info, h, name, isym, |
215007a6 L |
2004 | &sec, &value, &dynsym, |
2005 | override, dt_needed)) | |
6cdc0ccc | 2006 | goto error_free_vers; |
252b5132 | 2007 | |
9147e853 JJ |
2008 | if (definition && (abfd->flags & DYNAMIC) == 0) |
2009 | { | |
2010 | char *p = strchr (name, ELF_VER_CHR); | |
2011 | if (p != NULL && p[1] != ELF_VER_CHR) | |
2012 | { | |
2013 | /* Queue non-default versions so that .symver x, x@FOO | |
2014 | aliases can be checked. */ | |
2015 | if (! nondeflt_vers) | |
2016 | { | |
2017 | amt = (isymend - isym + 1) | |
2018 | * sizeof (struct elf_link_hash_entry *); | |
2019 | nondeflt_vers = bfd_malloc (amt); | |
2020 | } | |
2021 | nondeflt_vers [nondeflt_vers_cnt++] = h; | |
2022 | } | |
2023 | } | |
2024 | ||
252b5132 RH |
2025 | if (dynsym && h->dynindx == -1) |
2026 | { | |
2027 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
6cdc0ccc | 2028 | goto error_free_vers; |
252b5132 RH |
2029 | if (h->weakdef != NULL |
2030 | && ! new_weakdef | |
2031 | && h->weakdef->dynindx == -1) | |
2032 | { | |
a7b97311 | 2033 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) |
6cdc0ccc | 2034 | goto error_free_vers; |
252b5132 RH |
2035 | } |
2036 | } | |
38048eb9 | 2037 | else if (dynsym && h->dynindx != -1) |
0444bdd4 L |
2038 | /* If the symbol already has a dynamic index, but |
2039 | visibility says it should not be visible, turn it into | |
2040 | a local symbol. */ | |
2041 | switch (ELF_ST_VISIBILITY (h->other)) | |
2042 | { | |
2043 | case STV_INTERNAL: | |
3e932841 | 2044 | case STV_HIDDEN: |
b34976b6 | 2045 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
0444bdd4 L |
2046 | break; |
2047 | } | |
74816898 L |
2048 | |
2049 | if (dt_needed && definition | |
2050 | && (h->elf_link_hash_flags | |
2051 | & ELF_LINK_HASH_REF_REGULAR) != 0) | |
2052 | { | |
2053 | bfd_size_type oldsize; | |
2054 | bfd_size_type strindex; | |
2055 | ||
8ea2e4bd | 2056 | if (! is_elf_hash_table (info)) |
6cdc0ccc | 2057 | goto error_free_vers; |
8ea2e4bd | 2058 | |
74816898 | 2059 | /* The symbol from a DT_NEEDED object is referenced from |
c44233aa | 2060 | the regular object to create a dynamic executable. We |
3e932841 | 2061 | have to make sure there is a DT_NEEDED entry for it. */ |
74816898 | 2062 | |
b34976b6 | 2063 | dt_needed = FALSE; |
2b0f7ef9 JJ |
2064 | oldsize = _bfd_elf_strtab_size (hash_table->dynstr); |
2065 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, | |
b34976b6 | 2066 | elf_dt_soname (abfd), FALSE); |
74816898 | 2067 | if (strindex == (bfd_size_type) -1) |
6cdc0ccc | 2068 | goto error_free_vers; |
74816898 | 2069 | |
2b0f7ef9 | 2070 | if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr)) |
74816898 L |
2071 | { |
2072 | asection *sdyn; | |
2073 | Elf_External_Dyn *dyncon, *dynconend; | |
2074 | ||
8ea2e4bd | 2075 | sdyn = bfd_get_section_by_name (hash_table->dynobj, |
74816898 L |
2076 | ".dynamic"); |
2077 | BFD_ASSERT (sdyn != NULL); | |
2078 | ||
2079 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
2080 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
2081 | sdyn->_raw_size); | |
2082 | for (; dyncon < dynconend; dyncon++) | |
2083 | { | |
2084 | Elf_Internal_Dyn dyn; | |
2085 | ||
8ea2e4bd | 2086 | elf_swap_dyn_in (hash_table->dynobj, |
74816898 L |
2087 | dyncon, &dyn); |
2088 | BFD_ASSERT (dyn.d_tag != DT_NEEDED || | |
2089 | dyn.d_un.d_val != strindex); | |
2090 | } | |
2091 | } | |
2092 | ||
dc810e39 | 2093 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex)) |
6cdc0ccc | 2094 | goto error_free_vers; |
74816898 | 2095 | } |
252b5132 RH |
2096 | } |
2097 | } | |
2098 | ||
9147e853 JJ |
2099 | /* Now that all the symbols from this input file are created, handle |
2100 | .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */ | |
2101 | if (nondeflt_vers != NULL) | |
2102 | { | |
2103 | bfd_size_type cnt, symidx; | |
2104 | ||
2105 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
2106 | { | |
2107 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
2108 | char *shortname, *p; | |
2109 | ||
2110 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
2111 | if (p == NULL | |
2112 | || (h->root.type != bfd_link_hash_defined | |
2113 | && h->root.type != bfd_link_hash_defweak)) | |
2114 | continue; | |
2115 | ||
2116 | amt = p - h->root.root.string; | |
2117 | shortname = bfd_malloc (amt + 1); | |
2118 | memcpy (shortname, h->root.root.string, amt); | |
2119 | shortname[amt] = '\0'; | |
2120 | ||
2121 | hi = (struct elf_link_hash_entry *) | |
2122 | bfd_link_hash_lookup (info->hash, shortname, | |
2123 | FALSE, FALSE, FALSE); | |
2124 | if (hi != NULL | |
2125 | && hi->root.type == h->root.type | |
2126 | && hi->root.u.def.value == h->root.u.def.value | |
2127 | && hi->root.u.def.section == h->root.u.def.section) | |
2128 | { | |
2129 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
2130 | hi->root.type = bfd_link_hash_indirect; | |
2131 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
2132 | (*bed->elf_backend_copy_indirect_symbol) (bed, h, hi); | |
2133 | sym_hash = elf_sym_hashes (abfd); | |
2134 | if (sym_hash) | |
2135 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
2136 | if (sym_hash[symidx] == hi) | |
2137 | { | |
2138 | sym_hash[symidx] = h; | |
2139 | break; | |
2140 | } | |
2141 | } | |
2142 | free (shortname); | |
2143 | } | |
2144 | free (nondeflt_vers); | |
2145 | nondeflt_vers = NULL; | |
2146 | } | |
2147 | ||
6cdc0ccc AM |
2148 | if (extversym != NULL) |
2149 | { | |
2150 | free (extversym); | |
2151 | extversym = NULL; | |
2152 | } | |
2153 | ||
2154 | if (isymbuf != NULL) | |
2155 | free (isymbuf); | |
2156 | isymbuf = NULL; | |
2157 | ||
252b5132 RH |
2158 | /* Now set the weakdefs field correctly for all the weak defined |
2159 | symbols we found. The only way to do this is to search all the | |
2160 | symbols. Since we only need the information for non functions in | |
2161 | dynamic objects, that's the only time we actually put anything on | |
2162 | the list WEAKS. We need this information so that if a regular | |
2163 | object refers to a symbol defined weakly in a dynamic object, the | |
2164 | real symbol in the dynamic object is also put in the dynamic | |
2165 | symbols; we also must arrange for both symbols to point to the | |
2166 | same memory location. We could handle the general case of symbol | |
2167 | aliasing, but a general symbol alias can only be generated in | |
2168 | assembler code, handling it correctly would be very time | |
2169 | consuming, and other ELF linkers don't handle general aliasing | |
2170 | either. */ | |
2171 | while (weaks != NULL) | |
2172 | { | |
2173 | struct elf_link_hash_entry *hlook; | |
2174 | asection *slook; | |
2175 | bfd_vma vlook; | |
2176 | struct elf_link_hash_entry **hpp; | |
2177 | struct elf_link_hash_entry **hppend; | |
2178 | ||
2179 | hlook = weaks; | |
2180 | weaks = hlook->weakdef; | |
2181 | hlook->weakdef = NULL; | |
2182 | ||
2183 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
2184 | || hlook->root.type == bfd_link_hash_defweak | |
2185 | || hlook->root.type == bfd_link_hash_common | |
2186 | || hlook->root.type == bfd_link_hash_indirect); | |
2187 | slook = hlook->root.u.def.section; | |
2188 | vlook = hlook->root.u.def.value; | |
2189 | ||
2190 | hpp = elf_sym_hashes (abfd); | |
2191 | hppend = hpp + extsymcount; | |
2192 | for (; hpp < hppend; hpp++) | |
2193 | { | |
2194 | struct elf_link_hash_entry *h; | |
2195 | ||
2196 | h = *hpp; | |
2197 | if (h != NULL && h != hlook | |
2198 | && h->root.type == bfd_link_hash_defined | |
2199 | && h->root.u.def.section == slook | |
2200 | && h->root.u.def.value == vlook) | |
2201 | { | |
2202 | hlook->weakdef = h; | |
2203 | ||
2204 | /* If the weak definition is in the list of dynamic | |
2205 | symbols, make sure the real definition is put there | |
2206 | as well. */ | |
2207 | if (hlook->dynindx != -1 | |
2208 | && h->dynindx == -1) | |
2209 | { | |
2210 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
2211 | goto error_return; | |
2212 | } | |
2213 | ||
2214 | /* If the real definition is in the list of dynamic | |
c44233aa AM |
2215 | symbols, make sure the weak definition is put there |
2216 | as well. If we don't do this, then the dynamic | |
2217 | loader might not merge the entries for the real | |
2218 | definition and the weak definition. */ | |
252b5132 RH |
2219 | if (h->dynindx != -1 |
2220 | && hlook->dynindx == -1) | |
2221 | { | |
2222 | if (! _bfd_elf_link_record_dynamic_symbol (info, hlook)) | |
2223 | goto error_return; | |
2224 | } | |
252b5132 RH |
2225 | break; |
2226 | } | |
2227 | } | |
2228 | } | |
2229 | ||
252b5132 RH |
2230 | /* If this object is the same format as the output object, and it is |
2231 | not a shared library, then let the backend look through the | |
2232 | relocs. | |
2233 | ||
2234 | This is required to build global offset table entries and to | |
2235 | arrange for dynamic relocs. It is not required for the | |
2236 | particular common case of linking non PIC code, even when linking | |
2237 | against shared libraries, but unfortunately there is no way of | |
2238 | knowing whether an object file has been compiled PIC or not. | |
2239 | Looking through the relocs is not particularly time consuming. | |
2240 | The problem is that we must either (1) keep the relocs in memory, | |
2241 | which causes the linker to require additional runtime memory or | |
2242 | (2) read the relocs twice from the input file, which wastes time. | |
2243 | This would be a good case for using mmap. | |
2244 | ||
2245 | I have no idea how to handle linking PIC code into a file of a | |
2246 | different format. It probably can't be done. */ | |
2247 | check_relocs = get_elf_backend_data (abfd)->check_relocs; | |
2248 | if (! dynamic | |
2249 | && abfd->xvec == info->hash->creator | |
2250 | && check_relocs != NULL) | |
2251 | { | |
2252 | asection *o; | |
2253 | ||
2254 | for (o = abfd->sections; o != NULL; o = o->next) | |
2255 | { | |
2256 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2257 | bfd_boolean ok; |
252b5132 RH |
2258 | |
2259 | if ((o->flags & SEC_RELOC) == 0 | |
2260 | || o->reloc_count == 0 | |
2261 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2262 | && (o->flags & SEC_DEBUGGING) != 0) | |
2263 | || bfd_is_abs_section (o->output_section)) | |
2264 | continue; | |
2265 | ||
2266 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
2267 | (abfd, o, (PTR) NULL, | |
2268 | (Elf_Internal_Rela *) NULL, | |
2269 | info->keep_memory)); | |
2270 | if (internal_relocs == NULL) | |
2271 | goto error_return; | |
2272 | ||
2273 | ok = (*check_relocs) (abfd, info, o, internal_relocs); | |
2274 | ||
6cdc0ccc | 2275 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
2276 | free (internal_relocs); |
2277 | ||
2278 | if (! ok) | |
2279 | goto error_return; | |
2280 | } | |
2281 | } | |
2282 | ||
d6fe2dc1 AM |
2283 | /* If this is a non-traditional link, try to optimize the handling |
2284 | of the .stab/.stabstr sections. */ | |
252b5132 | 2285 | if (! dynamic |
252b5132 RH |
2286 | && ! info->traditional_format |
2287 | && info->hash->creator->flavour == bfd_target_elf_flavour | |
8ea2e4bd | 2288 | && is_elf_hash_table (info) |
252b5132 RH |
2289 | && (info->strip != strip_all && info->strip != strip_debugger)) |
2290 | { | |
2291 | asection *stab, *stabstr; | |
2292 | ||
2293 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
2d653fc7 AM |
2294 | if (stab != NULL |
2295 | && (stab->flags & SEC_MERGE) == 0 | |
2296 | && !bfd_is_abs_section (stab->output_section)) | |
252b5132 RH |
2297 | { |
2298 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
2299 | ||
2300 | if (stabstr != NULL) | |
2301 | { | |
2302 | struct bfd_elf_section_data *secdata; | |
2303 | ||
2304 | secdata = elf_section_data (stab); | |
2305 | if (! _bfd_link_section_stabs (abfd, | |
8ea2e4bd | 2306 | & hash_table->stab_info, |
252b5132 | 2307 | stab, stabstr, |
65765700 | 2308 | &secdata->sec_info)) |
252b5132 | 2309 | goto error_return; |
65765700 | 2310 | if (secdata->sec_info) |
68bfbfcc | 2311 | stab->sec_info_type = ELF_INFO_TYPE_STABS; |
252b5132 RH |
2312 | } |
2313 | } | |
2314 | } | |
2315 | ||
8ea2e4bd NC |
2316 | if (! info->relocateable && ! dynamic |
2317 | && is_elf_hash_table (info)) | |
f5fa8ca2 JJ |
2318 | { |
2319 | asection *s; | |
2320 | ||
2321 | for (s = abfd->sections; s != NULL; s = s->next) | |
2d653fc7 AM |
2322 | if ((s->flags & SEC_MERGE) != 0 |
2323 | && !bfd_is_abs_section (s->output_section)) | |
65765700 JJ |
2324 | { |
2325 | struct bfd_elf_section_data *secdata; | |
2326 | ||
2327 | secdata = elf_section_data (s); | |
2328 | if (! _bfd_merge_section (abfd, | |
2329 | & hash_table->merge_info, | |
2330 | s, &secdata->sec_info)) | |
2331 | goto error_return; | |
2332 | else if (secdata->sec_info) | |
68bfbfcc | 2333 | s->sec_info_type = ELF_INFO_TYPE_MERGE; |
65765700 | 2334 | } |
f5fa8ca2 JJ |
2335 | } |
2336 | ||
f5d44ba0 AM |
2337 | if (is_elf_hash_table (info)) |
2338 | { | |
2339 | /* Add this bfd to the loaded list. */ | |
2340 | struct elf_link_loaded_list *n; | |
2341 | ||
2342 | n = ((struct elf_link_loaded_list *) | |
2343 | bfd_alloc (abfd, sizeof (struct elf_link_loaded_list))); | |
2344 | if (n == NULL) | |
2345 | goto error_return; | |
2346 | n->abfd = abfd; | |
2347 | n->next = hash_table->loaded; | |
2348 | hash_table->loaded = n; | |
2349 | } | |
2350 | ||
b34976b6 | 2351 | return TRUE; |
252b5132 | 2352 | |
6cdc0ccc | 2353 | error_free_vers: |
9147e853 JJ |
2354 | if (nondeflt_vers != NULL) |
2355 | free (nondeflt_vers); | |
252b5132 RH |
2356 | if (extversym != NULL) |
2357 | free (extversym); | |
6cdc0ccc AM |
2358 | error_free_sym: |
2359 | if (isymbuf != NULL) | |
2360 | free (isymbuf); | |
2361 | error_return: | |
b34976b6 | 2362 | return FALSE; |
252b5132 RH |
2363 | } |
2364 | ||
2365 | /* Create some sections which will be filled in with dynamic linking | |
2366 | information. ABFD is an input file which requires dynamic sections | |
2367 | to be created. The dynamic sections take up virtual memory space | |
2368 | when the final executable is run, so we need to create them before | |
2369 | addresses are assigned to the output sections. We work out the | |
2370 | actual contents and size of these sections later. */ | |
2371 | ||
b34976b6 | 2372 | bfd_boolean |
252b5132 RH |
2373 | elf_link_create_dynamic_sections (abfd, info) |
2374 | bfd *abfd; | |
2375 | struct bfd_link_info *info; | |
2376 | { | |
2377 | flagword flags; | |
2378 | register asection *s; | |
2379 | struct elf_link_hash_entry *h; | |
14a793b2 | 2380 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
2381 | struct elf_backend_data *bed; |
2382 | ||
8ea2e4bd | 2383 | if (! is_elf_hash_table (info)) |
b34976b6 | 2384 | return FALSE; |
8ea2e4bd | 2385 | |
252b5132 | 2386 | if (elf_hash_table (info)->dynamic_sections_created) |
b34976b6 | 2387 | return TRUE; |
252b5132 RH |
2388 | |
2389 | /* Make sure that all dynamic sections use the same input BFD. */ | |
2390 | if (elf_hash_table (info)->dynobj == NULL) | |
2391 | elf_hash_table (info)->dynobj = abfd; | |
2392 | else | |
2393 | abfd = elf_hash_table (info)->dynobj; | |
2394 | ||
2395 | /* Note that we set the SEC_IN_MEMORY flag for all of these | |
2396 | sections. */ | |
2397 | flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
2398 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
2399 | ||
2400 | /* A dynamically linked executable has a .interp section, but a | |
2401 | shared library does not. */ | |
2402 | if (! info->shared) | |
2403 | { | |
2404 | s = bfd_make_section (abfd, ".interp"); | |
2405 | if (s == NULL | |
2406 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
b34976b6 | 2407 | return FALSE; |
252b5132 RH |
2408 | } |
2409 | ||
65765700 JJ |
2410 | if (! info->traditional_format |
2411 | && info->hash->creator->flavour == bfd_target_elf_flavour) | |
2412 | { | |
2413 | s = bfd_make_section (abfd, ".eh_frame_hdr"); | |
2414 | if (s == NULL | |
2415 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2416 | || ! bfd_set_section_alignment (abfd, s, 2)) | |
b34976b6 | 2417 | return FALSE; |
126495ed | 2418 | elf_hash_table (info)->eh_info.hdr_sec = s; |
65765700 JJ |
2419 | } |
2420 | ||
252b5132 RH |
2421 | /* Create sections to hold version informations. These are removed |
2422 | if they are not needed. */ | |
2423 | s = bfd_make_section (abfd, ".gnu.version_d"); | |
2424 | if (s == NULL | |
2425 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2426 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2427 | return FALSE; |
252b5132 RH |
2428 | |
2429 | s = bfd_make_section (abfd, ".gnu.version"); | |
2430 | if (s == NULL | |
2431 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2432 | || ! bfd_set_section_alignment (abfd, s, 1)) | |
b34976b6 | 2433 | return FALSE; |
252b5132 RH |
2434 | |
2435 | s = bfd_make_section (abfd, ".gnu.version_r"); | |
2436 | if (s == NULL | |
2437 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2438 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2439 | return FALSE; |
252b5132 RH |
2440 | |
2441 | s = bfd_make_section (abfd, ".dynsym"); | |
2442 | if (s == NULL | |
2443 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2444 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2445 | return FALSE; |
252b5132 RH |
2446 | |
2447 | s = bfd_make_section (abfd, ".dynstr"); | |
2448 | if (s == NULL | |
2449 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)) | |
b34976b6 | 2450 | return FALSE; |
252b5132 RH |
2451 | |
2452 | /* Create a strtab to hold the dynamic symbol names. */ | |
2453 | if (elf_hash_table (info)->dynstr == NULL) | |
2454 | { | |
2b0f7ef9 | 2455 | elf_hash_table (info)->dynstr = _bfd_elf_strtab_init (); |
252b5132 | 2456 | if (elf_hash_table (info)->dynstr == NULL) |
b34976b6 | 2457 | return FALSE; |
252b5132 RH |
2458 | } |
2459 | ||
2460 | s = bfd_make_section (abfd, ".dynamic"); | |
2461 | if (s == NULL | |
2462 | || ! bfd_set_section_flags (abfd, s, flags) | |
2463 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2464 | return FALSE; |
252b5132 RH |
2465 | |
2466 | /* The special symbol _DYNAMIC is always set to the start of the | |
2467 | .dynamic section. This call occurs before we have processed the | |
2468 | symbols for any dynamic object, so we don't have to worry about | |
2469 | overriding a dynamic definition. We could set _DYNAMIC in a | |
2470 | linker script, but we only want to define it if we are, in fact, | |
2471 | creating a .dynamic section. We don't want to define it if there | |
2472 | is no .dynamic section, since on some ELF platforms the start up | |
2473 | code examines it to decide how to initialize the process. */ | |
14a793b2 | 2474 | bh = NULL; |
252b5132 RH |
2475 | if (! (_bfd_generic_link_add_one_symbol |
2476 | (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0, | |
b34976b6 AM |
2477 | (const char *) 0, FALSE, get_elf_backend_data (abfd)->collect, &bh))) |
2478 | return FALSE; | |
14a793b2 | 2479 | h = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
2480 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
2481 | h->type = STT_OBJECT; | |
2482 | ||
2483 | if (info->shared | |
2484 | && ! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2485 | return FALSE; |
252b5132 | 2486 | |
c7ac6ff8 MM |
2487 | bed = get_elf_backend_data (abfd); |
2488 | ||
252b5132 RH |
2489 | s = bfd_make_section (abfd, ".hash"); |
2490 | if (s == NULL | |
2491 | || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY) | |
2492 | || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN)) | |
b34976b6 | 2493 | return FALSE; |
c7ac6ff8 | 2494 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; |
252b5132 RH |
2495 | |
2496 | /* Let the backend create the rest of the sections. This lets the | |
2497 | backend set the right flags. The backend will normally create | |
2498 | the .got and .plt sections. */ | |
252b5132 | 2499 | if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) |
b34976b6 | 2500 | return FALSE; |
252b5132 | 2501 | |
b34976b6 | 2502 | elf_hash_table (info)->dynamic_sections_created = TRUE; |
252b5132 | 2503 | |
b34976b6 | 2504 | return TRUE; |
252b5132 RH |
2505 | } |
2506 | ||
2507 | /* Add an entry to the .dynamic table. */ | |
2508 | ||
b34976b6 | 2509 | bfd_boolean |
252b5132 RH |
2510 | elf_add_dynamic_entry (info, tag, val) |
2511 | struct bfd_link_info *info; | |
2512 | bfd_vma tag; | |
2513 | bfd_vma val; | |
2514 | { | |
2515 | Elf_Internal_Dyn dyn; | |
2516 | bfd *dynobj; | |
2517 | asection *s; | |
dc810e39 | 2518 | bfd_size_type newsize; |
252b5132 RH |
2519 | bfd_byte *newcontents; |
2520 | ||
8ea2e4bd | 2521 | if (! is_elf_hash_table (info)) |
b34976b6 | 2522 | return FALSE; |
8ea2e4bd | 2523 | |
252b5132 RH |
2524 | dynobj = elf_hash_table (info)->dynobj; |
2525 | ||
2526 | s = bfd_get_section_by_name (dynobj, ".dynamic"); | |
2527 | BFD_ASSERT (s != NULL); | |
2528 | ||
2529 | newsize = s->_raw_size + sizeof (Elf_External_Dyn); | |
2530 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); | |
2531 | if (newcontents == NULL) | |
b34976b6 | 2532 | return FALSE; |
252b5132 RH |
2533 | |
2534 | dyn.d_tag = tag; | |
2535 | dyn.d_un.d_val = val; | |
2536 | elf_swap_dyn_out (dynobj, &dyn, | |
2537 | (Elf_External_Dyn *) (newcontents + s->_raw_size)); | |
2538 | ||
2539 | s->_raw_size = newsize; | |
2540 | s->contents = newcontents; | |
2541 | ||
b34976b6 | 2542 | return TRUE; |
252b5132 RH |
2543 | } |
2544 | \f | |
6b5bd373 MM |
2545 | /* Read and swap the relocs from the section indicated by SHDR. This |
2546 | may be either a REL or a RELA section. The relocations are | |
2547 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2548 | which should have already been allocated to contain enough space. | |
2549 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2550 | relocations should be stored. | |
2551 | ||
b34976b6 | 2552 | Returns FALSE if something goes wrong. */ |
6b5bd373 | 2553 | |
b34976b6 | 2554 | static bfd_boolean |
6b5bd373 MM |
2555 | elf_link_read_relocs_from_section (abfd, shdr, external_relocs, |
2556 | internal_relocs) | |
2557 | bfd *abfd; | |
2558 | Elf_Internal_Shdr *shdr; | |
2559 | PTR external_relocs; | |
2560 | Elf_Internal_Rela *internal_relocs; | |
2561 | { | |
c7ac6ff8 | 2562 | struct elf_backend_data *bed; |
947216bf AM |
2563 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); |
2564 | const bfd_byte *erela; | |
2565 | const bfd_byte *erelaend; | |
2566 | Elf_Internal_Rela *irela; | |
c7ac6ff8 | 2567 | |
6b5bd373 MM |
2568 | /* If there aren't any relocations, that's OK. */ |
2569 | if (!shdr) | |
b34976b6 | 2570 | return TRUE; |
6b5bd373 MM |
2571 | |
2572 | /* Position ourselves at the start of the section. */ | |
2573 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
b34976b6 | 2574 | return FALSE; |
6b5bd373 MM |
2575 | |
2576 | /* Read the relocations. */ | |
dc810e39 | 2577 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) |
b34976b6 | 2578 | return FALSE; |
6b5bd373 | 2579 | |
c7ac6ff8 MM |
2580 | bed = get_elf_backend_data (abfd); |
2581 | ||
6b5bd373 MM |
2582 | /* Convert the external relocations to the internal format. */ |
2583 | if (shdr->sh_entsize == sizeof (Elf_External_Rel)) | |
947216bf AM |
2584 | swap_in = bed->s->swap_reloc_in; |
2585 | else if (shdr->sh_entsize == sizeof (Elf_External_Rela)) | |
2586 | swap_in = bed->s->swap_reloca_in; | |
6b5bd373 | 2587 | else |
4fabe71e AM |
2588 | { |
2589 | bfd_set_error (bfd_error_wrong_format); | |
2590 | return FALSE; | |
2591 | } | |
6b5bd373 | 2592 | |
947216bf AM |
2593 | erela = external_relocs; |
2594 | erelaend = erela + NUM_SHDR_ENTRIES (shdr) * shdr->sh_entsize; | |
2595 | irela = internal_relocs; | |
2596 | while (erela < erelaend) | |
2597 | { | |
2598 | (*swap_in) (abfd, erela, irela); | |
2599 | irela += bed->s->int_rels_per_ext_rel; | |
2600 | erela += shdr->sh_entsize; | |
6b5bd373 MM |
2601 | } |
2602 | ||
b34976b6 | 2603 | return TRUE; |
6b5bd373 MM |
2604 | } |
2605 | ||
23bc299b MM |
2606 | /* Read and swap the relocs for a section O. They may have been |
2607 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2608 | not NULL, they are used as buffers to read into. They are known to | |
2609 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2610 | the return value is allocated using either malloc or bfd_alloc, | |
2611 | according to the KEEP_MEMORY argument. If O has two relocation | |
2612 | sections (both REL and RELA relocations), then the REL_HDR | |
2613 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
2614 | REL_HDR2 relocations. */ | |
252b5132 RH |
2615 | |
2616 | Elf_Internal_Rela * | |
2617 | NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs, | |
2618 | keep_memory) | |
2619 | bfd *abfd; | |
2620 | asection *o; | |
2621 | PTR external_relocs; | |
2622 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2623 | bfd_boolean keep_memory; |
252b5132 RH |
2624 | { |
2625 | Elf_Internal_Shdr *rel_hdr; | |
2626 | PTR alloc1 = NULL; | |
2627 | Elf_Internal_Rela *alloc2 = NULL; | |
c7ac6ff8 | 2628 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
252b5132 RH |
2629 | |
2630 | if (elf_section_data (o)->relocs != NULL) | |
2631 | return elf_section_data (o)->relocs; | |
2632 | ||
2633 | if (o->reloc_count == 0) | |
2634 | return NULL; | |
2635 | ||
2636 | rel_hdr = &elf_section_data (o)->rel_hdr; | |
2637 | ||
2638 | if (internal_relocs == NULL) | |
2639 | { | |
dc810e39 | 2640 | bfd_size_type size; |
252b5132 | 2641 | |
dc810e39 AM |
2642 | size = o->reloc_count; |
2643 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
252b5132 RH |
2644 | if (keep_memory) |
2645 | internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size); | |
2646 | else | |
2647 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); | |
2648 | if (internal_relocs == NULL) | |
2649 | goto error_return; | |
2650 | } | |
2651 | ||
2652 | if (external_relocs == NULL) | |
2653 | { | |
dc810e39 | 2654 | bfd_size_type size = rel_hdr->sh_size; |
6b5bd373 MM |
2655 | |
2656 | if (elf_section_data (o)->rel_hdr2) | |
dc810e39 | 2657 | size += elf_section_data (o)->rel_hdr2->sh_size; |
6b5bd373 | 2658 | alloc1 = (PTR) bfd_malloc (size); |
252b5132 RH |
2659 | if (alloc1 == NULL) |
2660 | goto error_return; | |
2661 | external_relocs = alloc1; | |
2662 | } | |
2663 | ||
6b5bd373 MM |
2664 | if (!elf_link_read_relocs_from_section (abfd, rel_hdr, |
2665 | external_relocs, | |
2666 | internal_relocs)) | |
2667 | goto error_return; | |
3e932841 KH |
2668 | if (!elf_link_read_relocs_from_section |
2669 | (abfd, | |
6b5bd373 | 2670 | elf_section_data (o)->rel_hdr2, |
2f5116e2 | 2671 | ((bfd_byte *) external_relocs) + rel_hdr->sh_size, |
d9bc7a44 | 2672 | internal_relocs + (NUM_SHDR_ENTRIES (rel_hdr) |
c7ac6ff8 | 2673 | * bed->s->int_rels_per_ext_rel))) |
252b5132 | 2674 | goto error_return; |
252b5132 RH |
2675 | |
2676 | /* Cache the results for next time, if we can. */ | |
2677 | if (keep_memory) | |
2678 | elf_section_data (o)->relocs = internal_relocs; | |
2679 | ||
2680 | if (alloc1 != NULL) | |
2681 | free (alloc1); | |
2682 | ||
2683 | /* Don't free alloc2, since if it was allocated we are passing it | |
2684 | back (under the name of internal_relocs). */ | |
2685 | ||
2686 | return internal_relocs; | |
2687 | ||
2688 | error_return: | |
2689 | if (alloc1 != NULL) | |
2690 | free (alloc1); | |
2691 | if (alloc2 != NULL) | |
2692 | free (alloc2); | |
2693 | return NULL; | |
2694 | } | |
2695 | \f | |
252b5132 RH |
2696 | /* Record an assignment to a symbol made by a linker script. We need |
2697 | this in case some dynamic object refers to this symbol. */ | |
2698 | ||
b34976b6 | 2699 | bfd_boolean |
252b5132 | 2700 | NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide) |
7442e600 | 2701 | bfd *output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
2702 | struct bfd_link_info *info; |
2703 | const char *name; | |
b34976b6 | 2704 | bfd_boolean provide; |
252b5132 RH |
2705 | { |
2706 | struct elf_link_hash_entry *h; | |
2707 | ||
2708 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
b34976b6 | 2709 | return TRUE; |
252b5132 | 2710 | |
b34976b6 | 2711 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, TRUE, FALSE); |
252b5132 | 2712 | if (h == NULL) |
b34976b6 | 2713 | return FALSE; |
252b5132 RH |
2714 | |
2715 | if (h->root.type == bfd_link_hash_new) | |
a7b97311 | 2716 | h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
252b5132 RH |
2717 | |
2718 | /* If this symbol is being provided by the linker script, and it is | |
2719 | currently defined by a dynamic object, but not by a regular | |
2720 | object, then mark it as undefined so that the generic linker will | |
2721 | force the correct value. */ | |
2722 | if (provide | |
2723 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2724 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2725 | h->root.type = bfd_link_hash_undefined; | |
2726 | ||
2727 | /* If this symbol is not being provided by the linker script, and it is | |
2728 | currently defined by a dynamic object, but not by a regular object, | |
2729 | then clear out any version information because the symbol will not be | |
2730 | associated with the dynamic object any more. */ | |
2731 | if (!provide | |
2732 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
2733 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
2734 | h->verinfo.verdef = NULL; | |
2735 | ||
2736 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
994819d2 | 2737 | |
252b5132 RH |
2738 | if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC |
2739 | | ELF_LINK_HASH_REF_DYNAMIC)) != 0 | |
2740 | || info->shared) | |
2741 | && h->dynindx == -1) | |
2742 | { | |
2743 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 2744 | return FALSE; |
252b5132 RH |
2745 | |
2746 | /* If this is a weak defined symbol, and we know a corresponding | |
2747 | real symbol from the same dynamic object, make sure the real | |
2748 | symbol is also made into a dynamic symbol. */ | |
2749 | if (h->weakdef != NULL | |
2750 | && h->weakdef->dynindx == -1) | |
2751 | { | |
2752 | if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef)) | |
b34976b6 | 2753 | return FALSE; |
252b5132 RH |
2754 | } |
2755 | } | |
2756 | ||
b34976b6 | 2757 | return TRUE; |
252b5132 RH |
2758 | } |
2759 | \f | |
2760 | /* This structure is used to pass information to | |
2761 | elf_link_assign_sym_version. */ | |
2762 | ||
2763 | struct elf_assign_sym_version_info | |
2764 | { | |
2765 | /* Output BFD. */ | |
2766 | bfd *output_bfd; | |
2767 | /* General link information. */ | |
2768 | struct bfd_link_info *info; | |
2769 | /* Version tree. */ | |
2770 | struct bfd_elf_version_tree *verdefs; | |
252b5132 | 2771 | /* Whether we had a failure. */ |
b34976b6 | 2772 | bfd_boolean failed; |
252b5132 RH |
2773 | }; |
2774 | ||
2775 | /* This structure is used to pass information to | |
2776 | elf_link_find_version_dependencies. */ | |
2777 | ||
2778 | struct elf_find_verdep_info | |
2779 | { | |
2780 | /* Output BFD. */ | |
2781 | bfd *output_bfd; | |
2782 | /* General link information. */ | |
2783 | struct bfd_link_info *info; | |
2784 | /* The number of dependencies. */ | |
2785 | unsigned int vers; | |
2786 | /* Whether we had a failure. */ | |
b34976b6 | 2787 | bfd_boolean failed; |
252b5132 RH |
2788 | }; |
2789 | ||
2790 | /* Array used to determine the number of hash table buckets to use | |
2791 | based on the number of symbols there are. If there are fewer than | |
2792 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
2793 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
2794 | than 32771 buckets. */ | |
2795 | ||
2796 | static const size_t elf_buckets[] = | |
2797 | { | |
2798 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
2799 | 16411, 32771, 0 | |
2800 | }; | |
2801 | ||
2802 | /* Compute bucket count for hashing table. We do not use a static set | |
2803 | of possible tables sizes anymore. Instead we determine for all | |
2804 | possible reasonable sizes of the table the outcome (i.e., the | |
2805 | number of collisions etc) and choose the best solution. The | |
2806 | weighting functions are not too simple to allow the table to grow | |
2807 | without bounds. Instead one of the weighting factors is the size. | |
2808 | Therefore the result is always a good payoff between few collisions | |
2809 | (= short chain lengths) and table size. */ | |
2810 | static size_t | |
2811 | compute_bucket_count (info) | |
2812 | struct bfd_link_info *info; | |
2813 | { | |
2814 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; | |
7442e600 | 2815 | size_t best_size = 0; |
252b5132 RH |
2816 | unsigned long int *hashcodes; |
2817 | unsigned long int *hashcodesp; | |
2818 | unsigned long int i; | |
dc810e39 | 2819 | bfd_size_type amt; |
252b5132 RH |
2820 | |
2821 | /* Compute the hash values for all exported symbols. At the same | |
2822 | time store the values in an array so that we could use them for | |
2823 | optimizations. */ | |
dc810e39 AM |
2824 | amt = dynsymcount; |
2825 | amt *= sizeof (unsigned long int); | |
2826 | hashcodes = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2827 | if (hashcodes == NULL) |
2828 | return 0; | |
2829 | hashcodesp = hashcodes; | |
2830 | ||
2831 | /* Put all hash values in HASHCODES. */ | |
2832 | elf_link_hash_traverse (elf_hash_table (info), | |
2833 | elf_collect_hash_codes, &hashcodesp); | |
2834 | ||
58821868 AM |
2835 | /* We have a problem here. The following code to optimize the table |
2836 | size requires an integer type with more the 32 bits. If | |
2837 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
252b5132 | 2838 | #ifdef BFD_HOST_U_64_BIT |
82e51918 | 2839 | if (info->optimize) |
252b5132 RH |
2840 | { |
2841 | unsigned long int nsyms = hashcodesp - hashcodes; | |
2842 | size_t minsize; | |
2843 | size_t maxsize; | |
2844 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
2845 | unsigned long int *counts ; | |
2846 | ||
2847 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
2848 | that the hashing table must at least have NSYMS/4 and at most | |
2849 | 2*NSYMS buckets. */ | |
2850 | minsize = nsyms / 4; | |
2851 | if (minsize == 0) | |
2852 | minsize = 1; | |
2853 | best_size = maxsize = nsyms * 2; | |
2854 | ||
2855 | /* Create array where we count the collisions in. We must use bfd_malloc | |
2856 | since the size could be large. */ | |
dc810e39 AM |
2857 | amt = maxsize; |
2858 | amt *= sizeof (unsigned long int); | |
2859 | counts = (unsigned long int *) bfd_malloc (amt); | |
252b5132 RH |
2860 | if (counts == NULL) |
2861 | { | |
2862 | free (hashcodes); | |
2863 | return 0; | |
2864 | } | |
2865 | ||
2866 | /* Compute the "optimal" size for the hash table. The criteria is a | |
2867 | minimal chain length. The minor criteria is (of course) the size | |
2868 | of the table. */ | |
2869 | for (i = minsize; i < maxsize; ++i) | |
2870 | { | |
2871 | /* Walk through the array of hashcodes and count the collisions. */ | |
2872 | BFD_HOST_U_64_BIT max; | |
2873 | unsigned long int j; | |
2874 | unsigned long int fact; | |
2875 | ||
2876 | memset (counts, '\0', i * sizeof (unsigned long int)); | |
2877 | ||
2878 | /* Determine how often each hash bucket is used. */ | |
2879 | for (j = 0; j < nsyms; ++j) | |
2880 | ++counts[hashcodes[j] % i]; | |
2881 | ||
2882 | /* For the weight function we need some information about the | |
2883 | pagesize on the target. This is information need not be 100% | |
2884 | accurate. Since this information is not available (so far) we | |
2885 | define it here to a reasonable default value. If it is crucial | |
2886 | to have a better value some day simply define this value. */ | |
2887 | # ifndef BFD_TARGET_PAGESIZE | |
2888 | # define BFD_TARGET_PAGESIZE (4096) | |
2889 | # endif | |
2890 | ||
2891 | /* We in any case need 2 + NSYMS entries for the size values and | |
2892 | the chains. */ | |
2893 | max = (2 + nsyms) * (ARCH_SIZE / 8); | |
2894 | ||
2895 | # if 1 | |
2896 | /* Variant 1: optimize for short chains. We add the squares | |
2897 | of all the chain lengths (which favous many small chain | |
2898 | over a few long chains). */ | |
2899 | for (j = 0; j < i; ++j) | |
2900 | max += counts[j] * counts[j]; | |
2901 | ||
2902 | /* This adds penalties for the overall size of the table. */ | |
2903 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2904 | max *= fact * fact; | |
2905 | # else | |
2906 | /* Variant 2: Optimize a lot more for small table. Here we | |
2907 | also add squares of the size but we also add penalties for | |
2908 | empty slots (the +1 term). */ | |
2909 | for (j = 0; j < i; ++j) | |
2910 | max += (1 + counts[j]) * (1 + counts[j]); | |
2911 | ||
2912 | /* The overall size of the table is considered, but not as | |
2913 | strong as in variant 1, where it is squared. */ | |
2914 | fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1; | |
2915 | max *= fact; | |
2916 | # endif | |
2917 | ||
2918 | /* Compare with current best results. */ | |
2919 | if (max < best_chlen) | |
2920 | { | |
2921 | best_chlen = max; | |
2922 | best_size = i; | |
2923 | } | |
2924 | } | |
2925 | ||
2926 | free (counts); | |
2927 | } | |
2928 | else | |
2929 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
2930 | { | |
2931 | /* This is the fallback solution if no 64bit type is available or if we | |
2932 | are not supposed to spend much time on optimizations. We select the | |
2933 | bucket count using a fixed set of numbers. */ | |
2934 | for (i = 0; elf_buckets[i] != 0; i++) | |
2935 | { | |
2936 | best_size = elf_buckets[i]; | |
2937 | if (dynsymcount < elf_buckets[i + 1]) | |
2938 | break; | |
2939 | } | |
2940 | } | |
2941 | ||
2942 | /* Free the arrays we needed. */ | |
2943 | free (hashcodes); | |
2944 | ||
2945 | return best_size; | |
2946 | } | |
2947 | ||
2948 | /* Set up the sizes and contents of the ELF dynamic sections. This is | |
2949 | called by the ELF linker emulation before_allocation routine. We | |
2950 | must set the sizes of the sections before the linker sets the | |
2951 | addresses of the various sections. */ | |
2952 | ||
b34976b6 | 2953 | bfd_boolean |
252b5132 | 2954 | NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath, |
99293407 | 2955 | filter_shlib, |
252b5132 RH |
2956 | auxiliary_filters, info, sinterpptr, |
2957 | verdefs) | |
2958 | bfd *output_bfd; | |
2959 | const char *soname; | |
2960 | const char *rpath; | |
252b5132 RH |
2961 | const char *filter_shlib; |
2962 | const char * const *auxiliary_filters; | |
2963 | struct bfd_link_info *info; | |
2964 | asection **sinterpptr; | |
2965 | struct bfd_elf_version_tree *verdefs; | |
2966 | { | |
2967 | bfd_size_type soname_indx; | |
25e27870 | 2968 | bfd *dynobj; |
252b5132 | 2969 | struct elf_backend_data *bed; |
252b5132 RH |
2970 | struct elf_assign_sym_version_info asvinfo; |
2971 | ||
2972 | *sinterpptr = NULL; | |
2973 | ||
2974 | soname_indx = (bfd_size_type) -1; | |
2975 | ||
2976 | if (info->hash->creator->flavour != bfd_target_elf_flavour) | |
b34976b6 | 2977 | return TRUE; |
252b5132 | 2978 | |
8ea2e4bd | 2979 | if (! is_elf_hash_table (info)) |
b34976b6 | 2980 | return TRUE; |
8ea2e4bd | 2981 | |
51b64d56 AM |
2982 | /* Any syms created from now on start with -1 in |
2983 | got.refcount/offset and plt.refcount/offset. */ | |
5cab59f6 | 2984 | elf_hash_table (info)->init_refcount = elf_hash_table (info)->init_offset; |
51b64d56 | 2985 | |
252b5132 RH |
2986 | /* The backend may have to create some sections regardless of whether |
2987 | we're dynamic or not. */ | |
2988 | bed = get_elf_backend_data (output_bfd); | |
2989 | if (bed->elf_backend_always_size_sections | |
2990 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
b34976b6 | 2991 | return FALSE; |
252b5132 RH |
2992 | |
2993 | dynobj = elf_hash_table (info)->dynobj; | |
2994 | ||
2995 | /* If there were no dynamic objects in the link, there is nothing to | |
2996 | do here. */ | |
2997 | if (dynobj == NULL) | |
b34976b6 | 2998 | return TRUE; |
252b5132 | 2999 | |
68f69152 | 3000 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
b34976b6 | 3001 | return FALSE; |
68f69152 | 3002 | |
252b5132 RH |
3003 | if (elf_hash_table (info)->dynamic_sections_created) |
3004 | { | |
3005 | struct elf_info_failed eif; | |
3006 | struct elf_link_hash_entry *h; | |
fc8c40a0 | 3007 | asection *dynstr; |
31941635 L |
3008 | struct bfd_elf_version_tree *t; |
3009 | struct bfd_elf_version_expr *d; | |
b34976b6 | 3010 | bfd_boolean all_defined; |
252b5132 RH |
3011 | |
3012 | *sinterpptr = bfd_get_section_by_name (dynobj, ".interp"); | |
3013 | BFD_ASSERT (*sinterpptr != NULL || info->shared); | |
3014 | ||
3015 | if (soname != NULL) | |
3016 | { | |
2b0f7ef9 | 3017 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3018 | soname, TRUE); |
252b5132 | 3019 | if (soname_indx == (bfd_size_type) -1 |
dc810e39 AM |
3020 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SONAME, |
3021 | soname_indx)) | |
b34976b6 | 3022 | return FALSE; |
252b5132 RH |
3023 | } |
3024 | ||
3025 | if (info->symbolic) | |
3026 | { | |
dc810e39 AM |
3027 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMBOLIC, |
3028 | (bfd_vma) 0)) | |
b34976b6 | 3029 | return FALSE; |
d6cf2879 | 3030 | info->flags |= DF_SYMBOLIC; |
252b5132 RH |
3031 | } |
3032 | ||
3033 | if (rpath != NULL) | |
3034 | { | |
3035 | bfd_size_type indx; | |
3036 | ||
2b0f7ef9 | 3037 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, |
b34976b6 | 3038 | TRUE); |
2b0f7ef9 JJ |
3039 | if (info->new_dtags) |
3040 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, indx); | |
252b5132 | 3041 | if (indx == (bfd_size_type) -1 |
dc810e39 | 3042 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_RPATH, indx) |
c25373b7 | 3043 | || (info->new_dtags |
dc810e39 AM |
3044 | && ! elf_add_dynamic_entry (info, (bfd_vma) DT_RUNPATH, |
3045 | indx))) | |
b34976b6 | 3046 | return FALSE; |
252b5132 RH |
3047 | } |
3048 | ||
3049 | if (filter_shlib != NULL) | |
3050 | { | |
3051 | bfd_size_type indx; | |
3052 | ||
2b0f7ef9 | 3053 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3054 | filter_shlib, TRUE); |
252b5132 | 3055 | if (indx == (bfd_size_type) -1 |
dc810e39 | 3056 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_FILTER, indx)) |
b34976b6 | 3057 | return FALSE; |
252b5132 RH |
3058 | } |
3059 | ||
3060 | if (auxiliary_filters != NULL) | |
3061 | { | |
3062 | const char * const *p; | |
3063 | ||
3064 | for (p = auxiliary_filters; *p != NULL; p++) | |
3065 | { | |
3066 | bfd_size_type indx; | |
3067 | ||
2b0f7ef9 | 3068 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3069 | *p, TRUE); |
252b5132 | 3070 | if (indx == (bfd_size_type) -1 |
dc810e39 AM |
3071 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_AUXILIARY, |
3072 | indx)) | |
b34976b6 | 3073 | return FALSE; |
252b5132 RH |
3074 | } |
3075 | } | |
3076 | ||
391a809a | 3077 | eif.info = info; |
bc2b6df7 | 3078 | eif.verdefs = verdefs; |
b34976b6 | 3079 | eif.failed = FALSE; |
391a809a | 3080 | |
ea44b734 | 3081 | /* If we are supposed to export all symbols into the dynamic symbol |
c44233aa | 3082 | table (this is not the normal case), then do so. */ |
99293407 | 3083 | if (info->export_dynamic) |
ea44b734 | 3084 | { |
ea44b734 | 3085 | elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol, |
c44233aa | 3086 | (PTR) &eif); |
ea44b734 | 3087 | if (eif.failed) |
b34976b6 | 3088 | return FALSE; |
ea44b734 RH |
3089 | } |
3090 | ||
31941635 L |
3091 | /* Make all global versions with definiton. */ |
3092 | for (t = verdefs; t != NULL; t = t->next) | |
3093 | for (d = t->globals; d != NULL; d = d->next) | |
3094 | if (!d->symver && strchr (d->pattern, '*') == NULL) | |
3095 | { | |
3096 | const char *verstr, *name; | |
3097 | size_t namelen, verlen, newlen; | |
3098 | char *newname, *p; | |
3099 | struct elf_link_hash_entry *newh; | |
3100 | ||
3101 | name = d->pattern; | |
3102 | namelen = strlen (name); | |
3103 | verstr = t->name; | |
3104 | verlen = strlen (verstr); | |
b34976b6 | 3105 | newlen = namelen + verlen + 3; |
31941635 L |
3106 | |
3107 | newname = (char *) bfd_malloc ((bfd_size_type) newlen); | |
3108 | if (newname == NULL) | |
b34976b6 | 3109 | return FALSE; |
31941635 L |
3110 | memcpy (newname, name, namelen); |
3111 | ||
3112 | /* Check the hidden versioned definition. */ | |
3113 | p = newname + namelen; | |
3114 | *p++ = ELF_VER_CHR; | |
3115 | memcpy (p, verstr, verlen + 1); | |
3116 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 AM |
3117 | newname, FALSE, FALSE, |
3118 | FALSE); | |
31941635 L |
3119 | if (newh == NULL |
3120 | || (newh->root.type != bfd_link_hash_defined | |
3121 | && newh->root.type != bfd_link_hash_defweak)) | |
3122 | { | |
3123 | /* Check the default versioned definition. */ | |
3124 | *p++ = ELF_VER_CHR; | |
3125 | memcpy (p, verstr, verlen + 1); | |
3126 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
b34976b6 AM |
3127 | newname, FALSE, FALSE, |
3128 | FALSE); | |
31941635 L |
3129 | } |
3130 | free (newname); | |
3131 | ||
c828c771 L |
3132 | /* Mark this version if there is a definition and it is |
3133 | not defined in a shared object. */ | |
31941635 | 3134 | if (newh != NULL |
c828c771 L |
3135 | && ((newh->elf_link_hash_flags |
3136 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0) | |
31941635 L |
3137 | && (newh->root.type == bfd_link_hash_defined |
3138 | || newh->root.type == bfd_link_hash_defweak)) | |
3139 | d->symver = 1; | |
3140 | } | |
3141 | ||
252b5132 RH |
3142 | /* Attach all the symbols to their version information. */ |
3143 | asvinfo.output_bfd = output_bfd; | |
3144 | asvinfo.info = info; | |
3145 | asvinfo.verdefs = verdefs; | |
b34976b6 | 3146 | asvinfo.failed = FALSE; |
252b5132 RH |
3147 | |
3148 | elf_link_hash_traverse (elf_hash_table (info), | |
3149 | elf_link_assign_sym_version, | |
3150 | (PTR) &asvinfo); | |
3151 | if (asvinfo.failed) | |
b34976b6 | 3152 | return FALSE; |
252b5132 | 3153 | |
31941635 L |
3154 | if (!info->allow_undefined_version) |
3155 | { | |
3156 | /* Check if all global versions have a definiton. */ | |
b34976b6 | 3157 | all_defined = TRUE; |
31941635 L |
3158 | for (t = verdefs; t != NULL; t = t->next) |
3159 | for (d = t->globals; d != NULL; d = d->next) | |
3160 | if (!d->symver && !d->script | |
3161 | && strchr (d->pattern, '*') == NULL) | |
3162 | { | |
3163 | (*_bfd_error_handler) | |
3164 | (_("%s: undefined version: %s"), | |
3165 | d->pattern, t->name); | |
b34976b6 | 3166 | all_defined = FALSE; |
31941635 L |
3167 | } |
3168 | ||
3169 | if (!all_defined) | |
3170 | { | |
3171 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3172 | return FALSE; |
31941635 L |
3173 | } |
3174 | } | |
3175 | ||
252b5132 RH |
3176 | /* Find all symbols which were defined in a dynamic object and make |
3177 | the backend pick a reasonable value for them. */ | |
252b5132 RH |
3178 | elf_link_hash_traverse (elf_hash_table (info), |
3179 | elf_adjust_dynamic_symbol, | |
3180 | (PTR) &eif); | |
3181 | if (eif.failed) | |
b34976b6 | 3182 | return FALSE; |
252b5132 RH |
3183 | |
3184 | /* Add some entries to the .dynamic section. We fill in some of the | |
3185 | values later, in elf_bfd_final_link, but we must add the entries | |
3186 | now so that we know the final size of the .dynamic section. */ | |
f0c2e336 MM |
3187 | |
3188 | /* If there are initialization and/or finalization functions to | |
3189 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
3190 | h = (info->init_function | |
3e932841 | 3191 | ? elf_link_hash_lookup (elf_hash_table (info), |
b34976b6 AM |
3192 | info->init_function, FALSE, |
3193 | FALSE, FALSE) | |
f0c2e336 | 3194 | : NULL); |
252b5132 RH |
3195 | if (h != NULL |
3196 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3197 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3198 | { | |
dc810e39 | 3199 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_INIT, (bfd_vma) 0)) |
b34976b6 | 3200 | return FALSE; |
252b5132 | 3201 | } |
f0c2e336 | 3202 | h = (info->fini_function |
3e932841 | 3203 | ? elf_link_hash_lookup (elf_hash_table (info), |
b34976b6 AM |
3204 | info->fini_function, FALSE, |
3205 | FALSE, FALSE) | |
f0c2e336 | 3206 | : NULL); |
252b5132 RH |
3207 | if (h != NULL |
3208 | && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR | |
3209 | | ELF_LINK_HASH_DEF_REGULAR)) != 0) | |
3210 | { | |
dc810e39 | 3211 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FINI, (bfd_vma) 0)) |
b34976b6 | 3212 | return FALSE; |
252b5132 | 3213 | } |
f0c2e336 | 3214 | |
fa7ea4d8 AM |
3215 | if (bfd_get_section_by_name (output_bfd, ".preinit_array") != NULL) |
3216 | { | |
3217 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
3218 | if (info->shared) | |
3219 | { | |
3220 | bfd *sub; | |
3221 | asection *o; | |
3222 | ||
3223 | for (sub = info->input_bfds; sub != NULL; | |
3224 | sub = sub->link_next) | |
3225 | for (o = sub->sections; o != NULL; o = o->next) | |
3226 | if (elf_section_data (o)->this_hdr.sh_type | |
3227 | == SHT_PREINIT_ARRAY) | |
3228 | { | |
3229 | (*_bfd_error_handler) | |
3230 | (_("%s: .preinit_array section is not allowed in DSO"), | |
58821868 | 3231 | bfd_archive_filename (sub)); |
fa7ea4d8 AM |
3232 | break; |
3233 | } | |
60166579 | 3234 | |
36b4f6e7 | 3235 | bfd_set_error (bfd_error_nonrepresentable_section); |
b34976b6 | 3236 | return FALSE; |
fa7ea4d8 AM |
3237 | } |
3238 | ||
3239 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAY, | |
3240 | (bfd_vma) 0) | |
3241 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAYSZ, | |
3242 | (bfd_vma) 0)) | |
b34976b6 | 3243 | return FALSE; |
fa7ea4d8 AM |
3244 | } |
3245 | if (bfd_get_section_by_name (output_bfd, ".init_array") != NULL) | |
3246 | { | |
3247 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAY, | |
3248 | (bfd_vma) 0) | |
3249 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAYSZ, | |
3250 | (bfd_vma) 0)) | |
b34976b6 | 3251 | return FALSE; |
fa7ea4d8 AM |
3252 | } |
3253 | if (bfd_get_section_by_name (output_bfd, ".fini_array") != NULL) | |
3254 | { | |
3255 | if (!elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAY, | |
3256 | (bfd_vma) 0) | |
3257 | || !elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAYSZ, | |
3258 | (bfd_vma) 0)) | |
b34976b6 | 3259 | return FALSE; |
fa7ea4d8 | 3260 | } |
30831527 | 3261 | |
fc8c40a0 AM |
3262 | dynstr = bfd_get_section_by_name (dynobj, ".dynstr"); |
3263 | /* If .dynstr is excluded from the link, we don't want any of | |
3264 | these tags. Strictly, we should be checking each section | |
3265 | individually; This quick check covers for the case where | |
3266 | someone does a /DISCARD/ : { *(*) }. */ | |
3267 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
3268 | { | |
3269 | bfd_size_type strsize; | |
3270 | ||
2b0f7ef9 | 3271 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
dc810e39 AM |
3272 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_HASH, (bfd_vma) 0) |
3273 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRTAB, (bfd_vma) 0) | |
3274 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMTAB, (bfd_vma) 0) | |
3275 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRSZ, strsize) | |
3276 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMENT, | |
3277 | (bfd_vma) sizeof (Elf_External_Sym))) | |
b34976b6 | 3278 | return FALSE; |
fc8c40a0 | 3279 | } |
252b5132 RH |
3280 | } |
3281 | ||
3282 | /* The backend must work out the sizes of all the other dynamic | |
3283 | sections. */ | |
252b5132 RH |
3284 | if (bed->elf_backend_size_dynamic_sections |
3285 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) | |
b34976b6 | 3286 | return FALSE; |
252b5132 RH |
3287 | |
3288 | if (elf_hash_table (info)->dynamic_sections_created) | |
3289 | { | |
dc810e39 | 3290 | bfd_size_type dynsymcount; |
252b5132 RH |
3291 | asection *s; |
3292 | size_t bucketcount = 0; | |
c7ac6ff8 | 3293 | size_t hash_entry_size; |
db6751f2 | 3294 | unsigned int dtagcount; |
252b5132 RH |
3295 | |
3296 | /* Set up the version definition section. */ | |
3297 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); | |
3298 | BFD_ASSERT (s != NULL); | |
3299 | ||
3300 | /* We may have created additional version definitions if we are | |
c44233aa | 3301 | just linking a regular application. */ |
252b5132 RH |
3302 | verdefs = asvinfo.verdefs; |
3303 | ||
6b9b879a JJ |
3304 | /* Skip anonymous version tag. */ |
3305 | if (verdefs != NULL && verdefs->vernum == 0) | |
3306 | verdefs = verdefs->next; | |
3307 | ||
252b5132 | 3308 | if (verdefs == NULL) |
7f8d5fc9 | 3309 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3310 | else |
3311 | { | |
3312 | unsigned int cdefs; | |
3313 | bfd_size_type size; | |
3314 | struct bfd_elf_version_tree *t; | |
3315 | bfd_byte *p; | |
3316 | Elf_Internal_Verdef def; | |
3317 | Elf_Internal_Verdaux defaux; | |
3318 | ||
252b5132 RH |
3319 | cdefs = 0; |
3320 | size = 0; | |
3321 | ||
3322 | /* Make space for the base version. */ | |
3323 | size += sizeof (Elf_External_Verdef); | |
3324 | size += sizeof (Elf_External_Verdaux); | |
3325 | ++cdefs; | |
3326 | ||
3327 | for (t = verdefs; t != NULL; t = t->next) | |
3328 | { | |
3329 | struct bfd_elf_version_deps *n; | |
3330 | ||
3331 | size += sizeof (Elf_External_Verdef); | |
3332 | size += sizeof (Elf_External_Verdaux); | |
3333 | ++cdefs; | |
3334 | ||
3335 | for (n = t->deps; n != NULL; n = n->next) | |
3336 | size += sizeof (Elf_External_Verdaux); | |
3337 | } | |
3338 | ||
3339 | s->_raw_size = size; | |
3340 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3341 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3342 | return FALSE; |
252b5132 RH |
3343 | |
3344 | /* Fill in the version definition section. */ | |
3345 | ||
3346 | p = s->contents; | |
3347 | ||
3348 | def.vd_version = VER_DEF_CURRENT; | |
3349 | def.vd_flags = VER_FLG_BASE; | |
3350 | def.vd_ndx = 1; | |
3351 | def.vd_cnt = 1; | |
3352 | def.vd_aux = sizeof (Elf_External_Verdef); | |
3353 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3354 | + sizeof (Elf_External_Verdaux)); | |
3355 | ||
3356 | if (soname_indx != (bfd_size_type) -1) | |
3357 | { | |
2b0f7ef9 JJ |
3358 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3359 | soname_indx); | |
3a99b017 | 3360 | def.vd_hash = bfd_elf_hash (soname); |
252b5132 RH |
3361 | defaux.vda_name = soname_indx; |
3362 | } | |
3363 | else | |
3364 | { | |
3365 | const char *name; | |
3366 | bfd_size_type indx; | |
3367 | ||
96fd004e | 3368 | name = basename (output_bfd->filename); |
3a99b017 | 3369 | def.vd_hash = bfd_elf_hash (name); |
2b0f7ef9 | 3370 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3371 | name, FALSE); |
252b5132 | 3372 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3373 | return FALSE; |
252b5132 RH |
3374 | defaux.vda_name = indx; |
3375 | } | |
3376 | defaux.vda_next = 0; | |
3377 | ||
3378 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
a7b97311 | 3379 | (Elf_External_Verdef *) p); |
252b5132 RH |
3380 | p += sizeof (Elf_External_Verdef); |
3381 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3382 | (Elf_External_Verdaux *) p); | |
3383 | p += sizeof (Elf_External_Verdaux); | |
3384 | ||
3385 | for (t = verdefs; t != NULL; t = t->next) | |
3386 | { | |
3387 | unsigned int cdeps; | |
3388 | struct bfd_elf_version_deps *n; | |
3389 | struct elf_link_hash_entry *h; | |
14a793b2 | 3390 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
3391 | |
3392 | cdeps = 0; | |
3393 | for (n = t->deps; n != NULL; n = n->next) | |
3394 | ++cdeps; | |
3395 | ||
3396 | /* Add a symbol representing this version. */ | |
14a793b2 | 3397 | bh = NULL; |
252b5132 RH |
3398 | if (! (_bfd_generic_link_add_one_symbol |
3399 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
b34976b6 | 3400 | (bfd_vma) 0, (const char *) NULL, FALSE, |
14a793b2 | 3401 | get_elf_backend_data (dynobj)->collect, &bh))) |
b34976b6 | 3402 | return FALSE; |
14a793b2 | 3403 | h = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
3404 | h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF; |
3405 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3406 | h->type = STT_OBJECT; | |
3407 | h->verinfo.vertree = t; | |
3408 | ||
3409 | if (! _bfd_elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 3410 | return FALSE; |
252b5132 RH |
3411 | |
3412 | def.vd_version = VER_DEF_CURRENT; | |
3413 | def.vd_flags = 0; | |
3414 | if (t->globals == NULL && t->locals == NULL && ! t->used) | |
3415 | def.vd_flags |= VER_FLG_WEAK; | |
3416 | def.vd_ndx = t->vernum + 1; | |
3417 | def.vd_cnt = cdeps + 1; | |
3a99b017 | 3418 | def.vd_hash = bfd_elf_hash (t->name); |
252b5132 RH |
3419 | def.vd_aux = sizeof (Elf_External_Verdef); |
3420 | if (t->next != NULL) | |
3421 | def.vd_next = (sizeof (Elf_External_Verdef) | |
3422 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
3423 | else | |
3424 | def.vd_next = 0; | |
3425 | ||
3426 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
3427 | (Elf_External_Verdef *) p); | |
3428 | p += sizeof (Elf_External_Verdef); | |
3429 | ||
3430 | defaux.vda_name = h->dynstr_index; | |
2b0f7ef9 JJ |
3431 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, |
3432 | h->dynstr_index); | |
252b5132 RH |
3433 | if (t->deps == NULL) |
3434 | defaux.vda_next = 0; | |
3435 | else | |
3436 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3437 | t->name_indx = defaux.vda_name; | |
3438 | ||
3439 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3440 | (Elf_External_Verdaux *) p); | |
3441 | p += sizeof (Elf_External_Verdaux); | |
3442 | ||
3443 | for (n = t->deps; n != NULL; n = n->next) | |
3444 | { | |
3445 | if (n->version_needed == NULL) | |
3446 | { | |
3447 | /* This can happen if there was an error in the | |
3448 | version script. */ | |
3449 | defaux.vda_name = 0; | |
3450 | } | |
3451 | else | |
2b0f7ef9 JJ |
3452 | { |
3453 | defaux.vda_name = n->version_needed->name_indx; | |
3454 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
3455 | defaux.vda_name); | |
3456 | } | |
252b5132 RH |
3457 | if (n->next == NULL) |
3458 | defaux.vda_next = 0; | |
3459 | else | |
3460 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
3461 | ||
3462 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
3463 | (Elf_External_Verdaux *) p); | |
3464 | p += sizeof (Elf_External_Verdaux); | |
3465 | } | |
3466 | } | |
3467 | ||
dc810e39 AM |
3468 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEF, (bfd_vma) 0) |
3469 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEFNUM, | |
3470 | (bfd_vma) cdefs)) | |
b34976b6 | 3471 | return FALSE; |
252b5132 RH |
3472 | |
3473 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
3474 | } | |
3475 | ||
13ae64f3 | 3476 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) |
d6cf2879 | 3477 | { |
dc810e39 | 3478 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS, info->flags)) |
b34976b6 | 3479 | return FALSE; |
d6cf2879 L |
3480 | } |
3481 | ||
4d538889 | 3482 | if (info->flags_1) |
d6cf2879 L |
3483 | { |
3484 | if (! info->shared) | |
3485 | info->flags_1 &= ~ (DF_1_INITFIRST | |
3486 | | DF_1_NODELETE | |
3487 | | DF_1_NOOPEN); | |
dc810e39 AM |
3488 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS_1, |
3489 | info->flags_1)) | |
b34976b6 | 3490 | return FALSE; |
d6cf2879 L |
3491 | } |
3492 | ||
252b5132 RH |
3493 | /* Work out the size of the version reference section. */ |
3494 | ||
3495 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); | |
3496 | BFD_ASSERT (s != NULL); | |
3497 | { | |
3498 | struct elf_find_verdep_info sinfo; | |
3499 | ||
3500 | sinfo.output_bfd = output_bfd; | |
3501 | sinfo.info = info; | |
3502 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
3503 | if (sinfo.vers == 0) | |
3504 | sinfo.vers = 1; | |
b34976b6 | 3505 | sinfo.failed = FALSE; |
252b5132 RH |
3506 | |
3507 | elf_link_hash_traverse (elf_hash_table (info), | |
3508 | elf_link_find_version_dependencies, | |
3509 | (PTR) &sinfo); | |
3510 | ||
3511 | if (elf_tdata (output_bfd)->verref == NULL) | |
7f8d5fc9 | 3512 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3513 | else |
3514 | { | |
3515 | Elf_Internal_Verneed *t; | |
3516 | unsigned int size; | |
3517 | unsigned int crefs; | |
3518 | bfd_byte *p; | |
3519 | ||
3520 | /* Build the version definition section. */ | |
3521 | size = 0; | |
3522 | crefs = 0; | |
3523 | for (t = elf_tdata (output_bfd)->verref; | |
3524 | t != NULL; | |
3525 | t = t->vn_nextref) | |
3526 | { | |
3527 | Elf_Internal_Vernaux *a; | |
3528 | ||
3529 | size += sizeof (Elf_External_Verneed); | |
3530 | ++crefs; | |
3531 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3532 | size += sizeof (Elf_External_Vernaux); | |
3533 | } | |
3534 | ||
3535 | s->_raw_size = size; | |
dc810e39 | 3536 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); |
252b5132 | 3537 | if (s->contents == NULL) |
b34976b6 | 3538 | return FALSE; |
252b5132 RH |
3539 | |
3540 | p = s->contents; | |
3541 | for (t = elf_tdata (output_bfd)->verref; | |
3542 | t != NULL; | |
3543 | t = t->vn_nextref) | |
3544 | { | |
3545 | unsigned int caux; | |
3546 | Elf_Internal_Vernaux *a; | |
3547 | bfd_size_type indx; | |
3548 | ||
3549 | caux = 0; | |
3550 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3551 | ++caux; | |
3552 | ||
3553 | t->vn_version = VER_NEED_CURRENT; | |
3554 | t->vn_cnt = caux; | |
2b0f7ef9 JJ |
3555 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
3556 | elf_dt_name (t->vn_bfd) != NULL | |
3557 | ? elf_dt_name (t->vn_bfd) | |
3558 | : basename (t->vn_bfd->filename), | |
b34976b6 | 3559 | FALSE); |
252b5132 | 3560 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3561 | return FALSE; |
252b5132 RH |
3562 | t->vn_file = indx; |
3563 | t->vn_aux = sizeof (Elf_External_Verneed); | |
3564 | if (t->vn_nextref == NULL) | |
3565 | t->vn_next = 0; | |
3566 | else | |
3567 | t->vn_next = (sizeof (Elf_External_Verneed) | |
3568 | + caux * sizeof (Elf_External_Vernaux)); | |
3569 | ||
3570 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
3571 | (Elf_External_Verneed *) p); | |
3572 | p += sizeof (Elf_External_Verneed); | |
3573 | ||
3574 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
3575 | { | |
3a99b017 | 3576 | a->vna_hash = bfd_elf_hash (a->vna_nodename); |
2b0f7ef9 | 3577 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, |
b34976b6 | 3578 | a->vna_nodename, FALSE); |
252b5132 | 3579 | if (indx == (bfd_size_type) -1) |
b34976b6 | 3580 | return FALSE; |
252b5132 RH |
3581 | a->vna_name = indx; |
3582 | if (a->vna_nextptr == NULL) | |
3583 | a->vna_next = 0; | |
3584 | else | |
3585 | a->vna_next = sizeof (Elf_External_Vernaux); | |
3586 | ||
3587 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
3588 | (Elf_External_Vernaux *) p); | |
3589 | p += sizeof (Elf_External_Vernaux); | |
3590 | } | |
3591 | } | |
3592 | ||
dc810e39 AM |
3593 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEED, |
3594 | (bfd_vma) 0) | |
3595 | || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEEDNUM, | |
3596 | (bfd_vma) crefs)) | |
b34976b6 | 3597 | return FALSE; |
252b5132 RH |
3598 | |
3599 | elf_tdata (output_bfd)->cverrefs = crefs; | |
3600 | } | |
3601 | } | |
3602 | ||
3e932841 | 3603 | /* Assign dynsym indicies. In a shared library we generate a |
30b30c21 RH |
3604 | section symbol for each output section, which come first. |
3605 | Next come all of the back-end allocated local dynamic syms, | |
3606 | followed by the rest of the global symbols. */ | |
3607 | ||
3608 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); | |
252b5132 RH |
3609 | |
3610 | /* Work out the size of the symbol version section. */ | |
3611 | s = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
3612 | BFD_ASSERT (s != NULL); | |
3613 | if (dynsymcount == 0 | |
3614 | || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL)) | |
3615 | { | |
7f8d5fc9 | 3616 | _bfd_strip_section_from_output (info, s); |
42751cf3 MM |
3617 | /* The DYNSYMCOUNT might have changed if we were going to |
3618 | output a dynamic symbol table entry for S. */ | |
30b30c21 | 3619 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info); |
252b5132 RH |
3620 | } |
3621 | else | |
3622 | { | |
3623 | s->_raw_size = dynsymcount * sizeof (Elf_External_Versym); | |
3624 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); | |
3625 | if (s->contents == NULL) | |
b34976b6 | 3626 | return FALSE; |
252b5132 | 3627 | |
dc810e39 | 3628 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERSYM, (bfd_vma) 0)) |
b34976b6 | 3629 | return FALSE; |
252b5132 RH |
3630 | } |
3631 | ||
3632 | /* Set the size of the .dynsym and .hash sections. We counted | |
3633 | the number of dynamic symbols in elf_link_add_object_symbols. | |
3634 | We will build the contents of .dynsym and .hash when we build | |
3635 | the final symbol table, because until then we do not know the | |
3636 | correct value to give the symbols. We built the .dynstr | |
3637 | section as we went along in elf_link_add_object_symbols. */ | |
3638 | s = bfd_get_section_by_name (dynobj, ".dynsym"); | |
3639 | BFD_ASSERT (s != NULL); | |
3640 | s->_raw_size = dynsymcount * sizeof (Elf_External_Sym); | |
3641 | s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size); | |
3642 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3643 | return FALSE; |
252b5132 | 3644 | |
fc8c40a0 AM |
3645 | if (dynsymcount != 0) |
3646 | { | |
3647 | Elf_Internal_Sym isym; | |
3648 | ||
3649 | /* The first entry in .dynsym is a dummy symbol. */ | |
3650 | isym.st_value = 0; | |
3651 | isym.st_size = 0; | |
3652 | isym.st_name = 0; | |
3653 | isym.st_info = 0; | |
3654 | isym.st_other = 0; | |
3655 | isym.st_shndx = 0; | |
9ad5cbcf | 3656 | elf_swap_symbol_out (output_bfd, &isym, (PTR) s->contents, (PTR) 0); |
fc8c40a0 | 3657 | } |
252b5132 RH |
3658 | |
3659 | /* Compute the size of the hashing table. As a side effect this | |
3660 | computes the hash values for all the names we export. */ | |
3661 | bucketcount = compute_bucket_count (info); | |
3662 | ||
3663 | s = bfd_get_section_by_name (dynobj, ".hash"); | |
3664 | BFD_ASSERT (s != NULL); | |
c7ac6ff8 MM |
3665 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; |
3666 | s->_raw_size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
1126897b | 3667 | s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size); |
252b5132 | 3668 | if (s->contents == NULL) |
b34976b6 | 3669 | return FALSE; |
252b5132 | 3670 | |
dc810e39 AM |
3671 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) bucketcount, |
3672 | s->contents); | |
3673 | bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) dynsymcount, | |
c7ac6ff8 | 3674 | s->contents + hash_entry_size); |
252b5132 RH |
3675 | |
3676 | elf_hash_table (info)->bucketcount = bucketcount; | |
3677 | ||
3678 | s = bfd_get_section_by_name (dynobj, ".dynstr"); | |
3679 | BFD_ASSERT (s != NULL); | |
2b0f7ef9 JJ |
3680 | |
3681 | elf_finalize_dynstr (output_bfd, info); | |
3682 | ||
3683 | s->_raw_size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
252b5132 | 3684 | |
db6751f2 | 3685 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) |
dc810e39 | 3686 | if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NULL, (bfd_vma) 0)) |
b34976b6 | 3687 | return FALSE; |
252b5132 RH |
3688 | } |
3689 | ||
b34976b6 | 3690 | return TRUE; |
252b5132 RH |
3691 | } |
3692 | \f | |
2b0f7ef9 JJ |
3693 | /* This function is used to adjust offsets into .dynstr for |
3694 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
c44233aa | 3695 | |
b34976b6 AM |
3696 | static bfd_boolean elf_adjust_dynstr_offsets |
3697 | PARAMS ((struct elf_link_hash_entry *, PTR)); | |
c44233aa | 3698 | |
b34976b6 | 3699 | static bfd_boolean |
2b0f7ef9 JJ |
3700 | elf_adjust_dynstr_offsets (h, data) |
3701 | struct elf_link_hash_entry *h; | |
3702 | PTR data; | |
3703 | { | |
3704 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; | |
3705 | ||
e92d460e AM |
3706 | if (h->root.type == bfd_link_hash_warning) |
3707 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3708 | ||
2b0f7ef9 JJ |
3709 | if (h->dynindx != -1) |
3710 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
b34976b6 | 3711 | return TRUE; |
2b0f7ef9 JJ |
3712 | } |
3713 | ||
3714 | /* Assign string offsets in .dynstr, update all structures referencing | |
3715 | them. */ | |
3716 | ||
b34976b6 | 3717 | static bfd_boolean |
2b0f7ef9 JJ |
3718 | elf_finalize_dynstr (output_bfd, info) |
3719 | bfd *output_bfd; | |
3720 | struct bfd_link_info *info; | |
3721 | { | |
3722 | struct elf_link_local_dynamic_entry *entry; | |
3723 | struct elf_strtab_hash *dynstr = elf_hash_table (info)->dynstr; | |
3724 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
3725 | asection *sdyn; | |
3726 | bfd_size_type size; | |
3727 | Elf_External_Dyn *dyncon, *dynconend; | |
3728 | ||
3729 | _bfd_elf_strtab_finalize (dynstr); | |
3730 | size = _bfd_elf_strtab_size (dynstr); | |
3731 | ||
3732 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3733 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3734 | BFD_ASSERT (sdyn != NULL); | |
3735 | ||
3736 | dyncon = (Elf_External_Dyn *) sdyn->contents; | |
3737 | dynconend = (Elf_External_Dyn *) (sdyn->contents + | |
3738 | sdyn->_raw_size); | |
3739 | for (; dyncon < dynconend; dyncon++) | |
3740 | { | |
3741 | Elf_Internal_Dyn dyn; | |
3742 | ||
3743 | elf_swap_dyn_in (dynobj, dyncon, & dyn); | |
3744 | switch (dyn.d_tag) | |
3745 | { | |
3746 | case DT_STRSZ: | |
3747 | dyn.d_un.d_val = size; | |
3748 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3749 | break; | |
3750 | case DT_NEEDED: | |
3751 | case DT_SONAME: | |
3752 | case DT_RPATH: | |
3753 | case DT_RUNPATH: | |
3754 | case DT_FILTER: | |
3755 | case DT_AUXILIARY: | |
3756 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); | |
3757 | elf_swap_dyn_out (dynobj, & dyn, dyncon); | |
3758 | break; | |
3759 | default: | |
3760 | break; | |
3761 | } | |
3762 | } | |
3763 | ||
3764 | /* Now update local dynamic symbols. */ | |
3765 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
3766 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3767 | entry->isym.st_name); | |
3768 | ||
3769 | /* And the rest of dynamic symbols. */ | |
3770 | elf_link_hash_traverse (elf_hash_table (info), | |
3771 | elf_adjust_dynstr_offsets, dynstr); | |
3772 | ||
3773 | /* Adjust version definitions. */ | |
3774 | if (elf_tdata (output_bfd)->cverdefs) | |
3775 | { | |
3776 | asection *s; | |
3777 | bfd_byte *p; | |
3778 | bfd_size_type i; | |
3779 | Elf_Internal_Verdef def; | |
3780 | Elf_Internal_Verdaux defaux; | |
c44233aa | 3781 | |
2b0f7ef9 JJ |
3782 | s = bfd_get_section_by_name (dynobj, ".gnu.version_d"); |
3783 | p = (bfd_byte *) s->contents; | |
3784 | do | |
3785 | { | |
3786 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3787 | &def); | |
3788 | p += sizeof (Elf_External_Verdef); | |
3789 | for (i = 0; i < def.vd_cnt; ++i) | |
3790 | { | |
3791 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3792 | (Elf_External_Verdaux *) p, &defaux); | |
3793 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3794 | defaux.vda_name); | |
3795 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3796 | &defaux, (Elf_External_Verdaux *) p); | |
3797 | p += sizeof (Elf_External_Verdaux); | |
3798 | } | |
3799 | } | |
3800 | while (def.vd_next); | |
3801 | } | |
3802 | ||
3803 | /* Adjust version references. */ | |
3804 | if (elf_tdata (output_bfd)->verref) | |
3805 | { | |
3806 | asection *s; | |
3807 | bfd_byte *p; | |
3808 | bfd_size_type i; | |
3809 | Elf_Internal_Verneed need; | |
3810 | Elf_Internal_Vernaux needaux; | |
c44233aa | 3811 | |
2b0f7ef9 JJ |
3812 | s = bfd_get_section_by_name (dynobj, ".gnu.version_r"); |
3813 | p = (bfd_byte *) s->contents; | |
3814 | do | |
3815 | { | |
3816 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3817 | &need); | |
3818 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3819 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3820 | (Elf_External_Verneed *) p); | |
3821 | p += sizeof (Elf_External_Verneed); | |
3822 | for (i = 0; i < need.vn_cnt; ++i) | |
3823 | { | |
3824 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3825 | (Elf_External_Vernaux *) p, &needaux); | |
3826 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3827 | needaux.vna_name); | |
3828 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3829 | &needaux, | |
3830 | (Elf_External_Vernaux *) p); | |
3831 | p += sizeof (Elf_External_Vernaux); | |
3832 | } | |
3833 | } | |
3834 | while (need.vn_next); | |
3835 | } | |
3836 | ||
b34976b6 | 3837 | return TRUE; |
2b0f7ef9 JJ |
3838 | } |
3839 | ||
252b5132 RH |
3840 | /* Fix up the flags for a symbol. This handles various cases which |
3841 | can only be fixed after all the input files are seen. This is | |
3842 | currently called by both adjust_dynamic_symbol and | |
3843 | assign_sym_version, which is unnecessary but perhaps more robust in | |
3844 | the face of future changes. */ | |
3845 | ||
b34976b6 | 3846 | static bfd_boolean |
252b5132 RH |
3847 | elf_fix_symbol_flags (h, eif) |
3848 | struct elf_link_hash_entry *h; | |
3849 | struct elf_info_failed *eif; | |
3850 | { | |
3851 | /* If this symbol was mentioned in a non-ELF file, try to set | |
3852 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
3853 | permit a non-ELF file to correctly refer to a symbol defined in | |
3854 | an ELF dynamic object. */ | |
3855 | if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0) | |
3856 | { | |
94b6c40a L |
3857 | while (h->root.type == bfd_link_hash_indirect) |
3858 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3859 | ||
252b5132 RH |
3860 | if (h->root.type != bfd_link_hash_defined |
3861 | && h->root.type != bfd_link_hash_defweak) | |
3862 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3863 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3864 | else | |
3865 | { | |
3866 | if (h->root.u.def.section->owner != NULL | |
3867 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
3868 | == bfd_target_elf_flavour)) | |
3869 | h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR | |
3870 | | ELF_LINK_HASH_REF_REGULAR_NONWEAK); | |
3871 | else | |
3872 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3873 | } | |
3874 | ||
3875 | if (h->dynindx == -1 | |
3876 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3877 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) | |
3878 | { | |
3879 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) | |
3880 | { | |
b34976b6 AM |
3881 | eif->failed = TRUE; |
3882 | return FALSE; | |
252b5132 RH |
3883 | } |
3884 | } | |
3885 | } | |
3886 | else | |
3887 | { | |
3888 | /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol | |
c44233aa AM |
3889 | was first seen in a non-ELF file. Fortunately, if the symbol |
3890 | was first seen in an ELF file, we're probably OK unless the | |
3891 | symbol was defined in a non-ELF file. Catch that case here. | |
3892 | FIXME: We're still in trouble if the symbol was first seen in | |
3893 | a dynamic object, and then later in a non-ELF regular object. */ | |
252b5132 RH |
3894 | if ((h->root.type == bfd_link_hash_defined |
3895 | || h->root.type == bfd_link_hash_defweak) | |
3896 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3897 | && (h->root.u.def.section->owner != NULL | |
3898 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
3899 | != bfd_target_elf_flavour) | |
3900 | : (bfd_is_abs_section (h->root.u.def.section) | |
3901 | && (h->elf_link_hash_flags | |
3902 | & ELF_LINK_HASH_DEF_DYNAMIC) == 0))) | |
3903 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3904 | } | |
3905 | ||
3906 | /* If this is a final link, and the symbol was defined as a common | |
3907 | symbol in a regular object file, and there was no definition in | |
3908 | any dynamic object, then the linker will have allocated space for | |
3909 | the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR | |
3910 | flag will not have been set. */ | |
3911 | if (h->root.type == bfd_link_hash_defined | |
3912 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
3913 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 | |
3914 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
3915 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
3916 | h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; | |
3917 | ||
3918 | /* If -Bsymbolic was used (which means to bind references to global | |
3919 | symbols to the definition within the shared object), and this | |
3920 | symbol was defined in a regular object, then it actually doesn't | |
d954b040 HPN |
3921 | need a PLT entry, and we can accomplish that by forcing it local. |
3922 | Likewise, if the symbol has hidden or internal visibility. | |
3923 | FIXME: It might be that we also do not need a PLT for other | |
3924 | non-hidden visibilities, but we would have to tell that to the | |
3925 | backend specifically; we can't just clear PLT-related data here. */ | |
252b5132 RH |
3926 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 |
3927 | && eif->info->shared | |
8ea2e4bd | 3928 | && is_elf_hash_table (eif->info) |
d954b040 HPN |
3929 | && (eif->info->symbolic |
3930 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3931 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
252b5132 RH |
3932 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) |
3933 | { | |
391a809a | 3934 | struct elf_backend_data *bed; |
b34976b6 | 3935 | bfd_boolean force_local; |
8ea2e4bd | 3936 | |
391a809a | 3937 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
e5094212 AM |
3938 | |
3939 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL | |
3940 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
3941 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
252b5132 RH |
3942 | } |
3943 | ||
fc4cc5bb ILT |
3944 | /* If this is a weak defined symbol in a dynamic object, and we know |
3945 | the real definition in the dynamic object, copy interesting flags | |
3946 | over to the real definition. */ | |
3947 | if (h->weakdef != NULL) | |
3948 | { | |
3949 | struct elf_link_hash_entry *weakdef; | |
3950 | ||
8e67855b NC |
3951 | weakdef = h->weakdef; |
3952 | if (h->root.type == bfd_link_hash_indirect) | |
3953 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3954 | ||
fc4cc5bb ILT |
3955 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
3956 | || h->root.type == bfd_link_hash_defweak); | |
fc4cc5bb ILT |
3957 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
3958 | || weakdef->root.type == bfd_link_hash_defweak); | |
3959 | BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC); | |
3960 | ||
3961 | /* If the real definition is defined by a regular object file, | |
3962 | don't do anything special. See the longer description in | |
3963 | elf_adjust_dynamic_symbol, below. */ | |
3964 | if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0) | |
3965 | h->weakdef = NULL; | |
3966 | else | |
0a991dfe AM |
3967 | { |
3968 | struct elf_backend_data *bed; | |
3969 | ||
3970 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); | |
b48fa14c | 3971 | (*bed->elf_backend_copy_indirect_symbol) (bed, weakdef, h); |
0a991dfe | 3972 | } |
fc4cc5bb ILT |
3973 | } |
3974 | ||
b34976b6 | 3975 | return TRUE; |
252b5132 RH |
3976 | } |
3977 | ||
3978 | /* Make the backend pick a good value for a dynamic symbol. This is | |
3979 | called via elf_link_hash_traverse, and also calls itself | |
3980 | recursively. */ | |
3981 | ||
b34976b6 | 3982 | static bfd_boolean |
252b5132 RH |
3983 | elf_adjust_dynamic_symbol (h, data) |
3984 | struct elf_link_hash_entry *h; | |
3985 | PTR data; | |
3986 | { | |
3987 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
3988 | bfd *dynobj; | |
3989 | struct elf_backend_data *bed; | |
3990 | ||
5cab59f6 AM |
3991 | if (! is_elf_hash_table (eif->info)) |
3992 | return FALSE; | |
3993 | ||
e92d460e AM |
3994 | if (h->root.type == bfd_link_hash_warning) |
3995 | { | |
5cab59f6 AM |
3996 | h->plt = elf_hash_table (eif->info)->init_offset; |
3997 | h->got = elf_hash_table (eif->info)->init_offset; | |
e92d460e AM |
3998 | |
3999 | /* When warning symbols are created, they **replace** the "real" | |
4000 | entry in the hash table, thus we never get to see the real | |
4001 | symbol in a hash traversal. So look at it now. */ | |
4002 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4003 | } | |
4004 | ||
252b5132 RH |
4005 | /* Ignore indirect symbols. These are added by the versioning code. */ |
4006 | if (h->root.type == bfd_link_hash_indirect) | |
b34976b6 | 4007 | return TRUE; |
252b5132 RH |
4008 | |
4009 | /* Fix the symbol flags. */ | |
4010 | if (! elf_fix_symbol_flags (h, eif)) | |
b34976b6 | 4011 | return FALSE; |
252b5132 RH |
4012 | |
4013 | /* If this symbol does not require a PLT entry, and it is not | |
4014 | defined by a dynamic object, or is not referenced by a regular | |
4015 | object, ignore it. We do have to handle a weak defined symbol, | |
4016 | even if no regular object refers to it, if we decided to add it | |
4017 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
4018 | about symbols which are defined by one dynamic object and | |
4019 | referenced by another one? */ | |
4020 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0 | |
4021 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4022 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4023 | || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 | |
4024 | && (h->weakdef == NULL || h->weakdef->dynindx == -1)))) | |
4025 | { | |
5cab59f6 | 4026 | h->plt = elf_hash_table (eif->info)->init_offset; |
b34976b6 | 4027 | return TRUE; |
252b5132 RH |
4028 | } |
4029 | ||
4030 | /* If we've already adjusted this symbol, don't do it again. This | |
4031 | can happen via a recursive call. */ | |
4032 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) | |
b34976b6 | 4033 | return TRUE; |
252b5132 RH |
4034 | |
4035 | /* Don't look at this symbol again. Note that we must set this | |
4036 | after checking the above conditions, because we may look at a | |
4037 | symbol once, decide not to do anything, and then get called | |
4038 | recursively later after REF_REGULAR is set below. */ | |
4039 | h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED; | |
4040 | ||
4041 | /* If this is a weak definition, and we know a real definition, and | |
4042 | the real symbol is not itself defined by a regular object file, | |
4043 | then get a good value for the real definition. We handle the | |
4044 | real symbol first, for the convenience of the backend routine. | |
4045 | ||
4046 | Note that there is a confusing case here. If the real definition | |
4047 | is defined by a regular object file, we don't get the real symbol | |
4048 | from the dynamic object, but we do get the weak symbol. If the | |
4049 | processor backend uses a COPY reloc, then if some routine in the | |
4050 | dynamic object changes the real symbol, we will not see that | |
4051 | change in the corresponding weak symbol. This is the way other | |
4052 | ELF linkers work as well, and seems to be a result of the shared | |
4053 | library model. | |
4054 | ||
4055 | I will clarify this issue. Most SVR4 shared libraries define the | |
4056 | variable _timezone and define timezone as a weak synonym. The | |
4057 | tzset call changes _timezone. If you write | |
4058 | extern int timezone; | |
4059 | int _timezone = 5; | |
4060 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
4061 | you might expect that, since timezone is a synonym for _timezone, | |
4062 | the same number will print both times. However, if the processor | |
4063 | backend uses a COPY reloc, then actually timezone will be copied | |
4064 | into your process image, and, since you define _timezone | |
4065 | yourself, _timezone will not. Thus timezone and _timezone will | |
4066 | wind up at different memory locations. The tzset call will set | |
4067 | _timezone, leaving timezone unchanged. */ | |
4068 | ||
4069 | if (h->weakdef != NULL) | |
4070 | { | |
fc4cc5bb ILT |
4071 | /* If we get to this point, we know there is an implicit |
4072 | reference by a regular object file via the weak symbol H. | |
4073 | FIXME: Is this really true? What if the traversal finds | |
4074 | H->WEAKDEF before it finds H? */ | |
4075 | h->weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR; | |
252b5132 | 4076 | |
fc4cc5bb | 4077 | if (! elf_adjust_dynamic_symbol (h->weakdef, (PTR) eif)) |
b34976b6 | 4078 | return FALSE; |
252b5132 RH |
4079 | } |
4080 | ||
4081 | /* If a symbol has no type and no size and does not require a PLT | |
4082 | entry, then we are probably about to do the wrong thing here: we | |
4083 | are probably going to create a COPY reloc for an empty object. | |
4084 | This case can arise when a shared object is built with assembly | |
4085 | code, and the assembly code fails to set the symbol type. */ | |
4086 | if (h->size == 0 | |
4087 | && h->type == STT_NOTYPE | |
4088 | && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0) | |
4089 | (*_bfd_error_handler) | |
4090 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
58821868 | 4091 | h->root.root.string); |
252b5132 RH |
4092 | |
4093 | dynobj = elf_hash_table (eif->info)->dynobj; | |
4094 | bed = get_elf_backend_data (dynobj); | |
4095 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) | |
4096 | { | |
b34976b6 AM |
4097 | eif->failed = TRUE; |
4098 | return FALSE; | |
252b5132 RH |
4099 | } |
4100 | ||
b34976b6 | 4101 | return TRUE; |
252b5132 RH |
4102 | } |
4103 | \f | |
4104 | /* This routine is used to export all defined symbols into the dynamic | |
4105 | symbol table. It is called via elf_link_hash_traverse. */ | |
4106 | ||
b34976b6 | 4107 | static bfd_boolean |
252b5132 RH |
4108 | elf_export_symbol (h, data) |
4109 | struct elf_link_hash_entry *h; | |
4110 | PTR data; | |
4111 | { | |
4112 | struct elf_info_failed *eif = (struct elf_info_failed *) data; | |
4113 | ||
4114 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
4115 | if (h->root.type == bfd_link_hash_indirect) | |
b34976b6 | 4116 | return TRUE; |
252b5132 | 4117 | |
e92d460e AM |
4118 | if (h->root.type == bfd_link_hash_warning) |
4119 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4120 | ||
252b5132 RH |
4121 | if (h->dynindx == -1 |
4122 | && (h->elf_link_hash_flags | |
4123 | & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0) | |
4124 | { | |
bc2b6df7 L |
4125 | struct bfd_elf_version_tree *t; |
4126 | struct bfd_elf_version_expr *d; | |
4127 | ||
4128 | for (t = eif->verdefs; t != NULL; t = t->next) | |
252b5132 | 4129 | { |
bc2b6df7 L |
4130 | if (t->globals != NULL) |
4131 | { | |
4132 | for (d = t->globals; d != NULL; d = d->next) | |
4133 | { | |
4134 | if ((*d->match) (d, h->root.root.string)) | |
4135 | goto doit; | |
4136 | } | |
4137 | } | |
4138 | ||
4139 | if (t->locals != NULL) | |
4140 | { | |
4141 | for (d = t->locals ; d != NULL; d = d->next) | |
4142 | { | |
4143 | if ((*d->match) (d, h->root.root.string)) | |
b34976b6 | 4144 | return TRUE; |
bc2b6df7 L |
4145 | } |
4146 | } | |
252b5132 | 4147 | } |
bc2b6df7 L |
4148 | |
4149 | if (!eif->verdefs) | |
c44233aa | 4150 | { |
58821868 | 4151 | doit: |
bc2b6df7 L |
4152 | if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
4153 | { | |
b34976b6 AM |
4154 | eif->failed = TRUE; |
4155 | return FALSE; | |
bc2b6df7 | 4156 | } |
c44233aa | 4157 | } |
252b5132 RH |
4158 | } |
4159 | ||
b34976b6 | 4160 | return TRUE; |
252b5132 RH |
4161 | } |
4162 | \f | |
4163 | /* Look through the symbols which are defined in other shared | |
4164 | libraries and referenced here. Update the list of version | |
4165 | dependencies. This will be put into the .gnu.version_r section. | |
4166 | This function is called via elf_link_hash_traverse. */ | |
4167 | ||
b34976b6 | 4168 | static bfd_boolean |
252b5132 RH |
4169 | elf_link_find_version_dependencies (h, data) |
4170 | struct elf_link_hash_entry *h; | |
4171 | PTR data; | |
4172 | { | |
4173 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; | |
4174 | Elf_Internal_Verneed *t; | |
4175 | Elf_Internal_Vernaux *a; | |
dc810e39 | 4176 | bfd_size_type amt; |
252b5132 | 4177 | |
e92d460e AM |
4178 | if (h->root.type == bfd_link_hash_warning) |
4179 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4180 | ||
252b5132 RH |
4181 | /* We only care about symbols defined in shared objects with version |
4182 | information. */ | |
4183 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 | |
4184 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 | |
4185 | || h->dynindx == -1 | |
4186 | || h->verinfo.verdef == NULL) | |
b34976b6 | 4187 | return TRUE; |
252b5132 RH |
4188 | |
4189 | /* See if we already know about this version. */ | |
4190 | for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref) | |
4191 | { | |
4192 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
4193 | continue; | |
4194 | ||
4195 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
4196 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
b34976b6 | 4197 | return TRUE; |
252b5132 RH |
4198 | |
4199 | break; | |
4200 | } | |
4201 | ||
4202 | /* This is a new version. Add it to tree we are building. */ | |
4203 | ||
4204 | if (t == NULL) | |
4205 | { | |
dc810e39 AM |
4206 | amt = sizeof *t; |
4207 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4208 | if (t == NULL) |
4209 | { | |
b34976b6 AM |
4210 | rinfo->failed = TRUE; |
4211 | return FALSE; | |
252b5132 RH |
4212 | } |
4213 | ||
4214 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
4215 | t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref; | |
4216 | elf_tdata (rinfo->output_bfd)->verref = t; | |
4217 | } | |
4218 | ||
dc810e39 AM |
4219 | amt = sizeof *a; |
4220 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, amt); | |
252b5132 RH |
4221 | |
4222 | /* Note that we are copying a string pointer here, and testing it | |
4223 | above. If bfd_elf_string_from_elf_section is ever changed to | |
4224 | discard the string data when low in memory, this will have to be | |
4225 | fixed. */ | |
4226 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
4227 | ||
4228 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
4229 | a->vna_nextptr = t->vn_auxptr; | |
4230 | ||
4231 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
4232 | ++rinfo->vers; | |
4233 | ||
4234 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
4235 | ||
4236 | t->vn_auxptr = a; | |
4237 | ||
b34976b6 | 4238 | return TRUE; |
252b5132 RH |
4239 | } |
4240 | ||
4241 | /* Figure out appropriate versions for all the symbols. We may not | |
4242 | have the version number script until we have read all of the input | |
4243 | files, so until that point we don't know which symbols should be | |
4244 | local. This function is called via elf_link_hash_traverse. */ | |
4245 | ||
b34976b6 | 4246 | static bfd_boolean |
252b5132 RH |
4247 | elf_link_assign_sym_version (h, data) |
4248 | struct elf_link_hash_entry *h; | |
4249 | PTR data; | |
4250 | { | |
dc810e39 AM |
4251 | struct elf_assign_sym_version_info *sinfo; |
4252 | struct bfd_link_info *info; | |
c61b8717 | 4253 | struct elf_backend_data *bed; |
252b5132 RH |
4254 | struct elf_info_failed eif; |
4255 | char *p; | |
dc810e39 AM |
4256 | bfd_size_type amt; |
4257 | ||
4258 | sinfo = (struct elf_assign_sym_version_info *) data; | |
4259 | info = sinfo->info; | |
252b5132 | 4260 | |
e92d460e AM |
4261 | if (h->root.type == bfd_link_hash_warning) |
4262 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4263 | ||
252b5132 | 4264 | /* Fix the symbol flags. */ |
b34976b6 | 4265 | eif.failed = FALSE; |
252b5132 RH |
4266 | eif.info = info; |
4267 | if (! elf_fix_symbol_flags (h, &eif)) | |
4268 | { | |
4269 | if (eif.failed) | |
b34976b6 AM |
4270 | sinfo->failed = TRUE; |
4271 | return FALSE; | |
252b5132 RH |
4272 | } |
4273 | ||
4274 | /* We only need version numbers for symbols defined in regular | |
4275 | objects. */ | |
4276 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
b34976b6 | 4277 | return TRUE; |
252b5132 | 4278 | |
c61b8717 | 4279 | bed = get_elf_backend_data (sinfo->output_bfd); |
252b5132 RH |
4280 | p = strchr (h->root.root.string, ELF_VER_CHR); |
4281 | if (p != NULL && h->verinfo.vertree == NULL) | |
4282 | { | |
4283 | struct bfd_elf_version_tree *t; | |
b34976b6 | 4284 | bfd_boolean hidden; |
252b5132 | 4285 | |
b34976b6 | 4286 | hidden = TRUE; |
252b5132 RH |
4287 | |
4288 | /* There are two consecutive ELF_VER_CHR characters if this is | |
c44233aa | 4289 | not a hidden symbol. */ |
252b5132 RH |
4290 | ++p; |
4291 | if (*p == ELF_VER_CHR) | |
4292 | { | |
b34976b6 | 4293 | hidden = FALSE; |
252b5132 RH |
4294 | ++p; |
4295 | } | |
4296 | ||
4297 | /* If there is no version string, we can just return out. */ | |
4298 | if (*p == '\0') | |
4299 | { | |
4300 | if (hidden) | |
4301 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
b34976b6 | 4302 | return TRUE; |
252b5132 RH |
4303 | } |
4304 | ||
4305 | /* Look for the version. If we find it, it is no longer weak. */ | |
4306 | for (t = sinfo->verdefs; t != NULL; t = t->next) | |
4307 | { | |
4308 | if (strcmp (t->name, p) == 0) | |
4309 | { | |
dc810e39 | 4310 | size_t len; |
252b5132 RH |
4311 | char *alc; |
4312 | struct bfd_elf_version_expr *d; | |
4313 | ||
4314 | len = p - h->root.root.string; | |
e5094212 | 4315 | alc = bfd_malloc ((bfd_size_type) len); |
252b5132 | 4316 | if (alc == NULL) |
b34976b6 | 4317 | return FALSE; |
d4c88bbb | 4318 | memcpy (alc, h->root.root.string, len - 1); |
252b5132 RH |
4319 | alc[len - 1] = '\0'; |
4320 | if (alc[len - 2] == ELF_VER_CHR) | |
c44233aa | 4321 | alc[len - 2] = '\0'; |
252b5132 RH |
4322 | |
4323 | h->verinfo.vertree = t; | |
b34976b6 | 4324 | t->used = TRUE; |
252b5132 RH |
4325 | d = NULL; |
4326 | ||
4327 | if (t->globals != NULL) | |
4328 | { | |
4329 | for (d = t->globals; d != NULL; d = d->next) | |
4330 | if ((*d->match) (d, alc)) | |
4331 | break; | |
4332 | } | |
4333 | ||
4334 | /* See if there is anything to force this symbol to | |
c44233aa | 4335 | local scope. */ |
252b5132 RH |
4336 | if (d == NULL && t->locals != NULL) |
4337 | { | |
4338 | for (d = t->locals; d != NULL; d = d->next) | |
4339 | { | |
4340 | if ((*d->match) (d, alc)) | |
4341 | { | |
4342 | if (h->dynindx != -1 | |
4343 | && info->shared | |
99293407 | 4344 | && ! info->export_dynamic) |
252b5132 | 4345 | { |
b34976b6 | 4346 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4347 | } |
4348 | ||
4349 | break; | |
4350 | } | |
4351 | } | |
4352 | } | |
4353 | ||
e5094212 | 4354 | free (alc); |
252b5132 RH |
4355 | break; |
4356 | } | |
4357 | } | |
4358 | ||
4359 | /* If we are building an application, we need to create a | |
c44233aa | 4360 | version node for this version. */ |
252b5132 RH |
4361 | if (t == NULL && ! info->shared) |
4362 | { | |
4363 | struct bfd_elf_version_tree **pp; | |
4364 | int version_index; | |
4365 | ||
4366 | /* If we aren't going to export this symbol, we don't need | |
c44233aa | 4367 | to worry about it. */ |
252b5132 | 4368 | if (h->dynindx == -1) |
b34976b6 | 4369 | return TRUE; |
252b5132 | 4370 | |
dc810e39 | 4371 | amt = sizeof *t; |
252b5132 | 4372 | t = ((struct bfd_elf_version_tree *) |
dc810e39 | 4373 | bfd_alloc (sinfo->output_bfd, amt)); |
252b5132 RH |
4374 | if (t == NULL) |
4375 | { | |
b34976b6 AM |
4376 | sinfo->failed = TRUE; |
4377 | return FALSE; | |
252b5132 RH |
4378 | } |
4379 | ||
4380 | t->next = NULL; | |
4381 | t->name = p; | |
4382 | t->globals = NULL; | |
4383 | t->locals = NULL; | |
4384 | t->deps = NULL; | |
4385 | t->name_indx = (unsigned int) -1; | |
b34976b6 | 4386 | t->used = TRUE; |
252b5132 RH |
4387 | |
4388 | version_index = 1; | |
6b9b879a JJ |
4389 | /* Don't count anonymous version tag. */ |
4390 | if (sinfo->verdefs != NULL && sinfo->verdefs->vernum == 0) | |
4391 | version_index = 0; | |
252b5132 RH |
4392 | for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next) |
4393 | ++version_index; | |
4394 | t->vernum = version_index; | |
4395 | ||
4396 | *pp = t; | |
4397 | ||
4398 | h->verinfo.vertree = t; | |
4399 | } | |
4400 | else if (t == NULL) | |
4401 | { | |
4402 | /* We could not find the version for a symbol when | |
c44233aa | 4403 | generating a shared archive. Return an error. */ |
252b5132 RH |
4404 | (*_bfd_error_handler) |
4405 | (_("%s: undefined versioned symbol name %s"), | |
4406 | bfd_get_filename (sinfo->output_bfd), h->root.root.string); | |
4407 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 AM |
4408 | sinfo->failed = TRUE; |
4409 | return FALSE; | |
252b5132 RH |
4410 | } |
4411 | ||
4412 | if (hidden) | |
4413 | h->elf_link_hash_flags |= ELF_LINK_HIDDEN; | |
4414 | } | |
4415 | ||
4416 | /* If we don't have a version for this symbol, see if we can find | |
4417 | something. */ | |
4418 | if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL) | |
4419 | { | |
4420 | struct bfd_elf_version_tree *t; | |
58821868 | 4421 | struct bfd_elf_version_tree *local_ver; |
252b5132 RH |
4422 | struct bfd_elf_version_expr *d; |
4423 | ||
4424 | /* See if can find what version this symbol is in. If the | |
c44233aa AM |
4425 | symbol is supposed to be local, then don't actually register |
4426 | it. */ | |
58821868 | 4427 | local_ver = NULL; |
252b5132 RH |
4428 | for (t = sinfo->verdefs; t != NULL; t = t->next) |
4429 | { | |
4430 | if (t->globals != NULL) | |
4431 | { | |
b34976b6 | 4432 | bfd_boolean matched; |
31941635 | 4433 | |
b34976b6 | 4434 | matched = FALSE; |
252b5132 RH |
4435 | for (d = t->globals; d != NULL; d = d->next) |
4436 | { | |
4437 | if ((*d->match) (d, h->root.root.string)) | |
4438 | { | |
31941635 | 4439 | if (d->symver) |
b34976b6 | 4440 | matched = TRUE; |
31941635 L |
4441 | else |
4442 | { | |
4443 | /* There is a version without definition. Make | |
4444 | the symbol the default definition for this | |
4445 | version. */ | |
4446 | h->verinfo.vertree = t; | |
4447 | local_ver = NULL; | |
4448 | d->script = 1; | |
4449 | break; | |
4450 | } | |
252b5132 RH |
4451 | } |
4452 | } | |
4453 | ||
4454 | if (d != NULL) | |
4455 | break; | |
31941635 L |
4456 | else if (matched) |
4457 | /* There is no undefined version for this symbol. Hide the | |
4458 | default one. */ | |
b34976b6 | 4459 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4460 | } |
4461 | ||
4462 | if (t->locals != NULL) | |
4463 | { | |
4464 | for (d = t->locals; d != NULL; d = d->next) | |
4465 | { | |
58821868 AM |
4466 | /* If the match is "*", keep looking for a more |
4467 | explicit, perhaps even global, match. */ | |
252b5132 | 4468 | if (d->pattern[0] == '*' && d->pattern[1] == '\0') |
58821868 | 4469 | local_ver = t; |
252b5132 RH |
4470 | else if ((*d->match) (d, h->root.root.string)) |
4471 | { | |
58821868 | 4472 | local_ver = t; |
252b5132 RH |
4473 | break; |
4474 | } | |
4475 | } | |
4476 | ||
4477 | if (d != NULL) | |
4478 | break; | |
4479 | } | |
4480 | } | |
4481 | ||
58821868 | 4482 | if (local_ver != NULL) |
252b5132 | 4483 | { |
58821868 | 4484 | h->verinfo.vertree = local_ver; |
252b5132 RH |
4485 | if (h->dynindx != -1 |
4486 | && info->shared | |
99293407 | 4487 | && ! info->export_dynamic) |
252b5132 | 4488 | { |
b34976b6 | 4489 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
252b5132 RH |
4490 | } |
4491 | } | |
4492 | } | |
4493 | ||
b34976b6 | 4494 | return TRUE; |
252b5132 | 4495 | } |
252b5132 RH |
4496 | \f |
4497 | /* Final phase of ELF linker. */ | |
4498 | ||
4499 | /* A structure we use to avoid passing large numbers of arguments. */ | |
4500 | ||
4501 | struct elf_final_link_info | |
4502 | { | |
4503 | /* General link information. */ | |
4504 | struct bfd_link_info *info; | |
4505 | /* Output BFD. */ | |
4506 | bfd *output_bfd; | |
4507 | /* Symbol string table. */ | |
4508 | struct bfd_strtab_hash *symstrtab; | |
4509 | /* .dynsym section. */ | |
4510 | asection *dynsym_sec; | |
4511 | /* .hash section. */ | |
4512 | asection *hash_sec; | |
4513 | /* symbol version section (.gnu.version). */ | |
4514 | asection *symver_sec; | |
13ae64f3 JJ |
4515 | /* first SHF_TLS section (if any). */ |
4516 | asection *first_tls_sec; | |
252b5132 RH |
4517 | /* Buffer large enough to hold contents of any section. */ |
4518 | bfd_byte *contents; | |
4519 | /* Buffer large enough to hold external relocs of any section. */ | |
4520 | PTR external_relocs; | |
4521 | /* Buffer large enough to hold internal relocs of any section. */ | |
4522 | Elf_Internal_Rela *internal_relocs; | |
4523 | /* Buffer large enough to hold external local symbols of any input | |
4524 | BFD. */ | |
4525 | Elf_External_Sym *external_syms; | |
9ad5cbcf AM |
4526 | /* And a buffer for symbol section indices. */ |
4527 | Elf_External_Sym_Shndx *locsym_shndx; | |
252b5132 RH |
4528 | /* Buffer large enough to hold internal local symbols of any input |
4529 | BFD. */ | |
4530 | Elf_Internal_Sym *internal_syms; | |
4531 | /* Array large enough to hold a symbol index for each local symbol | |
4532 | of any input BFD. */ | |
4533 | long *indices; | |
4534 | /* Array large enough to hold a section pointer for each local | |
4535 | symbol of any input BFD. */ | |
4536 | asection **sections; | |
4537 | /* Buffer to hold swapped out symbols. */ | |
4538 | Elf_External_Sym *symbuf; | |
9ad5cbcf AM |
4539 | /* And one for symbol section indices. */ |
4540 | Elf_External_Sym_Shndx *symshndxbuf; | |
252b5132 RH |
4541 | /* Number of swapped out symbols in buffer. */ |
4542 | size_t symbuf_count; | |
4543 | /* Number of symbols which fit in symbuf. */ | |
4544 | size_t symbuf_size; | |
c97e73dd AM |
4545 | /* And same for symshndxbuf. */ |
4546 | size_t shndxbuf_size; | |
252b5132 RH |
4547 | }; |
4548 | ||
b34976b6 | 4549 | static bfd_boolean elf_link_output_sym |
252b5132 RH |
4550 | PARAMS ((struct elf_final_link_info *, const char *, |
4551 | Elf_Internal_Sym *, asection *)); | |
b34976b6 | 4552 | static bfd_boolean elf_link_flush_output_syms |
252b5132 | 4553 | PARAMS ((struct elf_final_link_info *)); |
b34976b6 | 4554 | static bfd_boolean elf_link_output_extsym |
252b5132 | 4555 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 4556 | static bfd_boolean elf_link_sec_merge_syms |
f5fa8ca2 | 4557 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 4558 | static bfd_boolean elf_link_check_versioned_symbol |
f5d44ba0 | 4559 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 4560 | static bfd_boolean elf_link_input_bfd |
252b5132 | 4561 | PARAMS ((struct elf_final_link_info *, bfd *)); |
b34976b6 | 4562 | static bfd_boolean elf_reloc_link_order |
252b5132 RH |
4563 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
4564 | struct bfd_link_order *)); | |
4565 | ||
4566 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
4567 | ||
4568 | struct elf_outext_info | |
4569 | { | |
b34976b6 AM |
4570 | bfd_boolean failed; |
4571 | bfd_boolean localsyms; | |
252b5132 RH |
4572 | struct elf_final_link_info *finfo; |
4573 | }; | |
4574 | ||
23bc299b MM |
4575 | /* Compute the size of, and allocate space for, REL_HDR which is the |
4576 | section header for a section containing relocations for O. */ | |
4577 | ||
b34976b6 | 4578 | static bfd_boolean |
23bc299b MM |
4579 | elf_link_size_reloc_section (abfd, rel_hdr, o) |
4580 | bfd *abfd; | |
4581 | Elf_Internal_Shdr *rel_hdr; | |
4582 | asection *o; | |
4583 | { | |
dc810e39 AM |
4584 | bfd_size_type reloc_count; |
4585 | bfd_size_type num_rel_hashes; | |
23bc299b | 4586 | |
b037af20 MM |
4587 | /* Figure out how many relocations there will be. */ |
4588 | if (rel_hdr == &elf_section_data (o)->rel_hdr) | |
4589 | reloc_count = elf_section_data (o)->rel_count; | |
4590 | else | |
4591 | reloc_count = elf_section_data (o)->rel_count2; | |
4592 | ||
9317eacc CM |
4593 | num_rel_hashes = o->reloc_count; |
4594 | if (num_rel_hashes < reloc_count) | |
4595 | num_rel_hashes = reloc_count; | |
dc810e39 | 4596 | |
b037af20 MM |
4597 | /* That allows us to calculate the size of the section. */ |
4598 | rel_hdr->sh_size = rel_hdr->sh_entsize * reloc_count; | |
23bc299b MM |
4599 | |
4600 | /* The contents field must last into write_object_contents, so we | |
755cfd29 NC |
4601 | allocate it with bfd_alloc rather than malloc. Also since we |
4602 | cannot be sure that the contents will actually be filled in, | |
4603 | we zero the allocated space. */ | |
4604 | rel_hdr->contents = (PTR) bfd_zalloc (abfd, rel_hdr->sh_size); | |
23bc299b | 4605 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
b34976b6 | 4606 | return FALSE; |
3e932841 | 4607 | |
b037af20 MM |
4608 | /* We only allocate one set of hash entries, so we only do it the |
4609 | first time we are called. */ | |
9317eacc CM |
4610 | if (elf_section_data (o)->rel_hashes == NULL |
4611 | && num_rel_hashes) | |
b037af20 | 4612 | { |
209f668e NC |
4613 | struct elf_link_hash_entry **p; |
4614 | ||
b037af20 | 4615 | p = ((struct elf_link_hash_entry **) |
9317eacc | 4616 | bfd_zmalloc (num_rel_hashes |
209f668e | 4617 | * sizeof (struct elf_link_hash_entry *))); |
9317eacc | 4618 | if (p == NULL) |
b34976b6 | 4619 | return FALSE; |
23bc299b | 4620 | |
b037af20 | 4621 | elf_section_data (o)->rel_hashes = p; |
b037af20 | 4622 | } |
23bc299b | 4623 | |
b34976b6 | 4624 | return TRUE; |
23bc299b MM |
4625 | } |
4626 | ||
31367b81 MM |
4627 | /* When performing a relocateable link, the input relocations are |
4628 | preserved. But, if they reference global symbols, the indices | |
4629 | referenced must be updated. Update all the relocations in | |
4630 | REL_HDR (there are COUNT of them), using the data in REL_HASH. */ | |
4631 | ||
4632 | static void | |
4633 | elf_link_adjust_relocs (abfd, rel_hdr, count, rel_hash) | |
4634 | bfd *abfd; | |
4635 | Elf_Internal_Shdr *rel_hdr; | |
4636 | unsigned int count; | |
4637 | struct elf_link_hash_entry **rel_hash; | |
4638 | { | |
4639 | unsigned int i; | |
32f0787a | 4640 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
947216bf AM |
4641 | bfd_byte *erela; |
4642 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); | |
4643 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); | |
209f668e | 4644 | |
947216bf | 4645 | if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
209f668e | 4646 | { |
947216bf AM |
4647 | swap_in = bed->s->swap_reloc_in; |
4648 | swap_out = bed->s->swap_reloc_out; | |
209f668e | 4649 | } |
947216bf | 4650 | else if (rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) |
209f668e | 4651 | { |
947216bf AM |
4652 | swap_in = bed->s->swap_reloca_in; |
4653 | swap_out = bed->s->swap_reloca_out; | |
209f668e | 4654 | } |
947216bf AM |
4655 | else |
4656 | abort (); | |
4657 | ||
4658 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
4659 | abort (); | |
31367b81 | 4660 | |
947216bf AM |
4661 | erela = rel_hdr->contents; |
4662 | for (i = 0; i < count; i++, rel_hash++, erela += rel_hdr->sh_entsize) | |
31367b81 | 4663 | { |
947216bf AM |
4664 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; |
4665 | unsigned int j; | |
4666 | ||
31367b81 MM |
4667 | if (*rel_hash == NULL) |
4668 | continue; | |
4669 | ||
4670 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
4671 | ||
947216bf AM |
4672 | (*swap_in) (abfd, erela, irela); |
4673 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
4674 | irela[j].r_info = ELF_R_INFO ((*rel_hash)->indx, | |
4675 | ELF_R_TYPE (irela[j].r_info)); | |
4676 | (*swap_out) (abfd, irela, erela); | |
31367b81 MM |
4677 | } |
4678 | } | |
4679 | ||
58821868 AM |
4680 | struct elf_link_sort_rela |
4681 | { | |
db6751f2 JJ |
4682 | bfd_vma offset; |
4683 | enum elf_reloc_type_class type; | |
947216bf AM |
4684 | /* We use this as an array of size int_rels_per_ext_rel. */ |
4685 | Elf_Internal_Rela rela[1]; | |
db6751f2 JJ |
4686 | }; |
4687 | ||
4688 | static int | |
4689 | elf_link_sort_cmp1 (A, B) | |
4690 | const PTR A; | |
4691 | const PTR B; | |
4692 | { | |
f51e552e AM |
4693 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4694 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4695 | int relativea, relativeb; |
4696 | ||
4697 | relativea = a->type == reloc_class_relative; | |
4698 | relativeb = b->type == reloc_class_relative; | |
4699 | ||
4700 | if (relativea < relativeb) | |
db6751f2 | 4701 | return 1; |
fcfbdf31 JJ |
4702 | if (relativea > relativeb) |
4703 | return -1; | |
947216bf | 4704 | if (ELF_R_SYM (a->rela->r_info) < ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 4705 | return -1; |
947216bf | 4706 | if (ELF_R_SYM (a->rela->r_info) > ELF_R_SYM (b->rela->r_info)) |
db6751f2 | 4707 | return 1; |
947216bf | 4708 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 4709 | return -1; |
947216bf | 4710 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
4711 | return 1; |
4712 | return 0; | |
4713 | } | |
4714 | ||
4715 | static int | |
4716 | elf_link_sort_cmp2 (A, B) | |
4717 | const PTR A; | |
4718 | const PTR B; | |
4719 | { | |
f51e552e AM |
4720 | struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A; |
4721 | struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B; | |
db6751f2 JJ |
4722 | int copya, copyb; |
4723 | ||
4724 | if (a->offset < b->offset) | |
4725 | return -1; | |
4726 | if (a->offset > b->offset) | |
4727 | return 1; | |
290394d6 JJ |
4728 | copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt); |
4729 | copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt); | |
db6751f2 JJ |
4730 | if (copya < copyb) |
4731 | return -1; | |
4732 | if (copya > copyb) | |
4733 | return 1; | |
947216bf | 4734 | if (a->rela->r_offset < b->rela->r_offset) |
db6751f2 | 4735 | return -1; |
947216bf | 4736 | if (a->rela->r_offset > b->rela->r_offset) |
db6751f2 JJ |
4737 | return 1; |
4738 | return 0; | |
4739 | } | |
4740 | ||
4741 | static size_t | |
4742 | elf_link_sort_relocs (abfd, info, psec) | |
4743 | bfd *abfd; | |
4744 | struct bfd_link_info *info; | |
4745 | asection **psec; | |
4746 | { | |
4747 | bfd *dynobj = elf_hash_table (info)->dynobj; | |
4748 | asection *reldyn, *o; | |
f51e552e | 4749 | bfd_size_type count, size; |
947216bf AM |
4750 | size_t i, ret, sort_elt, ext_size; |
4751 | bfd_byte *sort, *s_non_relative, *p; | |
4752 | struct elf_link_sort_rela *sq; | |
db6751f2 | 4753 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
033fd5f9 | 4754 | int i2e = bed->s->int_rels_per_ext_rel; |
947216bf AM |
4755 | void (*swap_in) PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *)); |
4756 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); | |
db6751f2 JJ |
4757 | |
4758 | reldyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
4759 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4760 | { | |
4761 | reldyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
4762 | if (reldyn == NULL || reldyn->_raw_size == 0) | |
4763 | return 0; | |
947216bf AM |
4764 | ext_size = sizeof (Elf_External_Rel); |
4765 | swap_in = bed->s->swap_reloc_in; | |
4766 | swap_out = bed->s->swap_reloc_out; | |
db6751f2 JJ |
4767 | } |
4768 | else | |
947216bf AM |
4769 | { |
4770 | ext_size = sizeof (Elf_External_Rela); | |
4771 | swap_in = bed->s->swap_reloca_in; | |
4772 | swap_out = bed->s->swap_reloca_out; | |
4773 | } | |
4774 | count = reldyn->_raw_size / ext_size; | |
db6751f2 JJ |
4775 | |
4776 | size = 0; | |
4777 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4778 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4779 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4780 | && o->output_section == reldyn) | |
4781 | size += o->_raw_size; | |
4782 | ||
4783 | if (size != reldyn->_raw_size) | |
4784 | return 0; | |
4785 | ||
947216bf AM |
4786 | sort_elt = (sizeof (struct elf_link_sort_rela) |
4787 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
4788 | sort = bfd_zmalloc (sort_elt * count); | |
4789 | if (sort == NULL) | |
db6751f2 JJ |
4790 | { |
4791 | (*info->callbacks->warning) | |
dc810e39 AM |
4792 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, |
4793 | (bfd_vma) 0); | |
db6751f2 JJ |
4794 | return 0; |
4795 | } | |
4796 | ||
4797 | for (o = dynobj->sections; o != NULL; o = o->next) | |
4798 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4799 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4800 | && o->output_section == reldyn) | |
4801 | { | |
947216bf | 4802 | bfd_byte *erel, *erelend; |
db6751f2 | 4803 | |
947216bf AM |
4804 | erel = o->contents; |
4805 | erelend = o->contents + o->_raw_size; | |
4806 | p = sort + o->output_offset / ext_size * sort_elt; | |
4807 | while (erel < erelend) | |
db6751f2 | 4808 | { |
947216bf AM |
4809 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4810 | (*swap_in) (abfd, erel, s->rela); | |
4811 | s->type = (*bed->elf_backend_reloc_type_class) (s->rela); | |
4812 | p += sort_elt; | |
4813 | erel += ext_size; | |
db6751f2 JJ |
4814 | } |
4815 | } | |
4816 | ||
947216bf AM |
4817 | qsort (sort, (size_t) count, sort_elt, elf_link_sort_cmp1); |
4818 | ||
4819 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
db6751f2 | 4820 | { |
947216bf AM |
4821 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4822 | if (s->type != reloc_class_relative) | |
4823 | break; | |
db6751f2 | 4824 | } |
947216bf AM |
4825 | ret = i; |
4826 | s_non_relative = p; | |
4827 | ||
4828 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
4829 | for (; i < count; i++, p += sort_elt) | |
4830 | { | |
4831 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
4832 | if (ELF_R_SYM (sp->rela->r_info) != ELF_R_SYM (sq->rela->r_info)) | |
4833 | sq = sp; | |
4834 | sp->offset = sq->rela->r_offset; | |
4835 | } | |
4836 | ||
4837 | qsort (s_non_relative, (size_t) count - ret, sort_elt, elf_link_sort_cmp2); | |
dc810e39 | 4838 | |
db6751f2 JJ |
4839 | for (o = dynobj->sections; o != NULL; o = o->next) |
4840 | if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)) | |
4841 | == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED) | |
4842 | && o->output_section == reldyn) | |
4843 | { | |
947216bf | 4844 | bfd_byte *erel, *erelend; |
db6751f2 | 4845 | |
947216bf AM |
4846 | erel = o->contents; |
4847 | erelend = o->contents + o->_raw_size; | |
4848 | p = sort + o->output_offset / ext_size * sort_elt; | |
4849 | while (erel < erelend) | |
db6751f2 | 4850 | { |
947216bf AM |
4851 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; |
4852 | (*swap_out) (abfd, s->rela, erel); | |
4853 | p += sort_elt; | |
4854 | erel += ext_size; | |
db6751f2 JJ |
4855 | } |
4856 | } | |
4857 | ||
db6751f2 JJ |
4858 | *psec = reldyn; |
4859 | return ret; | |
4860 | } | |
4861 | ||
252b5132 RH |
4862 | /* Do the final step of an ELF link. */ |
4863 | ||
b34976b6 | 4864 | bfd_boolean |
252b5132 RH |
4865 | elf_bfd_final_link (abfd, info) |
4866 | bfd *abfd; | |
4867 | struct bfd_link_info *info; | |
4868 | { | |
b34976b6 AM |
4869 | bfd_boolean dynamic; |
4870 | bfd_boolean emit_relocs; | |
252b5132 RH |
4871 | bfd *dynobj; |
4872 | struct elf_final_link_info finfo; | |
4873 | register asection *o; | |
4874 | register struct bfd_link_order *p; | |
4875 | register bfd *sub; | |
dc810e39 AM |
4876 | bfd_size_type max_contents_size; |
4877 | bfd_size_type max_external_reloc_size; | |
4878 | bfd_size_type max_internal_reloc_count; | |
4879 | bfd_size_type max_sym_count; | |
9ad5cbcf | 4880 | bfd_size_type max_sym_shndx_count; |
252b5132 RH |
4881 | file_ptr off; |
4882 | Elf_Internal_Sym elfsym; | |
4883 | unsigned int i; | |
4884 | Elf_Internal_Shdr *symtab_hdr; | |
c97e73dd | 4885 | Elf_Internal_Shdr *symtab_shndx_hdr; |
252b5132 RH |
4886 | Elf_Internal_Shdr *symstrtab_hdr; |
4887 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
4888 | struct elf_outext_info eoinfo; | |
b34976b6 | 4889 | bfd_boolean merged; |
db6751f2 JJ |
4890 | size_t relativecount = 0; |
4891 | asection *reldyn = 0; | |
dc810e39 | 4892 | bfd_size_type amt; |
252b5132 | 4893 | |
8ea2e4bd | 4894 | if (! is_elf_hash_table (info)) |
b34976b6 | 4895 | return FALSE; |
8ea2e4bd | 4896 | |
252b5132 RH |
4897 | if (info->shared) |
4898 | abfd->flags |= DYNAMIC; | |
4899 | ||
4900 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
4901 | dynobj = elf_hash_table (info)->dynobj; | |
4902 | ||
9317eacc | 4903 | emit_relocs = (info->relocateable |
c44233aa AM |
4904 | || info->emitrelocations |
4905 | || bed->elf_backend_emit_relocs); | |
9317eacc | 4906 | |
252b5132 RH |
4907 | finfo.info = info; |
4908 | finfo.output_bfd = abfd; | |
4909 | finfo.symstrtab = elf_stringtab_init (); | |
4910 | if (finfo.symstrtab == NULL) | |
b34976b6 | 4911 | return FALSE; |
252b5132 RH |
4912 | |
4913 | if (! dynamic) | |
4914 | { | |
4915 | finfo.dynsym_sec = NULL; | |
4916 | finfo.hash_sec = NULL; | |
4917 | finfo.symver_sec = NULL; | |
4918 | } | |
4919 | else | |
4920 | { | |
4921 | finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym"); | |
4922 | finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash"); | |
4923 | BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL); | |
4924 | finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version"); | |
4925 | /* Note that it is OK if symver_sec is NULL. */ | |
4926 | } | |
4927 | ||
4928 | finfo.contents = NULL; | |
4929 | finfo.external_relocs = NULL; | |
4930 | finfo.internal_relocs = NULL; | |
4931 | finfo.external_syms = NULL; | |
9ad5cbcf | 4932 | finfo.locsym_shndx = NULL; |
252b5132 RH |
4933 | finfo.internal_syms = NULL; |
4934 | finfo.indices = NULL; | |
4935 | finfo.sections = NULL; | |
4936 | finfo.symbuf = NULL; | |
9ad5cbcf | 4937 | finfo.symshndxbuf = NULL; |
252b5132 | 4938 | finfo.symbuf_count = 0; |
c97e73dd | 4939 | finfo.shndxbuf_size = 0; |
13ae64f3 JJ |
4940 | finfo.first_tls_sec = NULL; |
4941 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) | |
4942 | if ((o->flags & SEC_THREAD_LOCAL) != 0 | |
4943 | && (o->flags & SEC_LOAD) != 0) | |
4944 | { | |
4945 | finfo.first_tls_sec = o; | |
4946 | break; | |
4947 | } | |
252b5132 RH |
4948 | |
4949 | /* Count up the number of relocations we will output for each output | |
4950 | section, so that we know the sizes of the reloc sections. We | |
4951 | also figure out some maximum sizes. */ | |
4952 | max_contents_size = 0; | |
4953 | max_external_reloc_size = 0; | |
4954 | max_internal_reloc_count = 0; | |
4955 | max_sym_count = 0; | |
9ad5cbcf | 4956 | max_sym_shndx_count = 0; |
b34976b6 | 4957 | merged = FALSE; |
252b5132 RH |
4958 | for (o = abfd->sections; o != (asection *) NULL; o = o->next) |
4959 | { | |
3f9a32bd | 4960 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
252b5132 RH |
4961 | o->reloc_count = 0; |
4962 | ||
4963 | for (p = o->link_order_head; p != NULL; p = p->next) | |
4964 | { | |
3f9a32bd AM |
4965 | unsigned int reloc_count = 0; |
4966 | struct bfd_elf_section_data *esdi = NULL; | |
4967 | unsigned int *rel_count1; | |
4968 | ||
252b5132 RH |
4969 | if (p->type == bfd_section_reloc_link_order |
4970 | || p->type == bfd_symbol_reloc_link_order) | |
3f9a32bd | 4971 | reloc_count = 1; |
252b5132 RH |
4972 | else if (p->type == bfd_indirect_link_order) |
4973 | { | |
4974 | asection *sec; | |
4975 | ||
4976 | sec = p->u.indirect.section; | |
3f9a32bd | 4977 | esdi = elf_section_data (sec); |
252b5132 RH |
4978 | |
4979 | /* Mark all sections which are to be included in the | |
4980 | link. This will normally be every section. We need | |
4981 | to do this so that we can identify any sections which | |
4982 | the linker has decided to not include. */ | |
b34976b6 | 4983 | sec->linker_mark = TRUE; |
252b5132 | 4984 | |
f5fa8ca2 | 4985 | if (sec->flags & SEC_MERGE) |
b34976b6 | 4986 | merged = TRUE; |
f5fa8ca2 | 4987 | |
a712da20 | 4988 | if (info->relocateable || info->emitrelocations) |
3f9a32bd | 4989 | reloc_count = sec->reloc_count; |
c44233aa | 4990 | else if (bed->elf_backend_count_relocs) |
9317eacc CM |
4991 | { |
4992 | Elf_Internal_Rela * relocs; | |
4993 | ||
4994 | relocs = (NAME(_bfd_elf,link_read_relocs) | |
4995 | (abfd, sec, (PTR) NULL, | |
4996 | (Elf_Internal_Rela *) NULL, info->keep_memory)); | |
4997 | ||
3f9a32bd | 4998 | reloc_count = (*bed->elf_backend_count_relocs) (sec, relocs); |
9317eacc | 4999 | |
6cdc0ccc | 5000 | if (elf_section_data (o)->relocs != relocs) |
9317eacc CM |
5001 | free (relocs); |
5002 | } | |
252b5132 RH |
5003 | |
5004 | if (sec->_raw_size > max_contents_size) | |
5005 | max_contents_size = sec->_raw_size; | |
5006 | if (sec->_cooked_size > max_contents_size) | |
5007 | max_contents_size = sec->_cooked_size; | |
5008 | ||
5009 | /* We are interested in just local symbols, not all | |
5010 | symbols. */ | |
5011 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
5012 | && (sec->owner->flags & DYNAMIC) == 0) | |
5013 | { | |
5014 | size_t sym_count; | |
5015 | ||
5016 | if (elf_bad_symtab (sec->owner)) | |
5017 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
5018 | / sizeof (Elf_External_Sym)); | |
5019 | else | |
5020 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
5021 | ||
5022 | if (sym_count > max_sym_count) | |
5023 | max_sym_count = sym_count; | |
5024 | ||
9ad5cbcf AM |
5025 | if (sym_count > max_sym_shndx_count |
5026 | && elf_symtab_shndx (sec->owner) != 0) | |
5027 | max_sym_shndx_count = sym_count; | |
5028 | ||
252b5132 RH |
5029 | if ((sec->flags & SEC_RELOC) != 0) |
5030 | { | |
5031 | size_t ext_size; | |
5032 | ||
5033 | ext_size = elf_section_data (sec)->rel_hdr.sh_size; | |
5034 | if (ext_size > max_external_reloc_size) | |
5035 | max_external_reloc_size = ext_size; | |
5036 | if (sec->reloc_count > max_internal_reloc_count) | |
5037 | max_internal_reloc_count = sec->reloc_count; | |
5038 | } | |
5039 | } | |
5040 | } | |
3f9a32bd AM |
5041 | |
5042 | if (reloc_count == 0) | |
5043 | continue; | |
5044 | ||
5045 | o->reloc_count += reloc_count; | |
5046 | ||
5047 | /* MIPS may have a mix of REL and RELA relocs on sections. | |
5048 | To support this curious ABI we keep reloc counts in | |
5049 | elf_section_data too. We must be careful to add the | |
5050 | relocations from the input section to the right output | |
5051 | count. FIXME: Get rid of one count. We have | |
5052 | o->reloc_count == esdo->rel_count + esdo->rel_count2. */ | |
5053 | rel_count1 = &esdo->rel_count; | |
5054 | if (esdi != NULL) | |
5055 | { | |
5056 | bfd_boolean same_size; | |
5057 | bfd_size_type entsize1; | |
5058 | ||
5059 | entsize1 = esdi->rel_hdr.sh_entsize; | |
5060 | BFD_ASSERT (entsize1 == sizeof (Elf_External_Rel) | |
5061 | || entsize1 == sizeof (Elf_External_Rela)); | |
5062 | same_size = (!o->use_rela_p | |
5063 | == (entsize1 == sizeof (Elf_External_Rel))); | |
5064 | ||
5065 | if (!same_size) | |
5066 | rel_count1 = &esdo->rel_count2; | |
5067 | ||
5068 | if (esdi->rel_hdr2 != NULL) | |
5069 | { | |
5070 | bfd_size_type entsize2 = esdi->rel_hdr2->sh_entsize; | |
5071 | unsigned int alt_count; | |
5072 | unsigned int *rel_count2; | |
5073 | ||
5074 | BFD_ASSERT (entsize2 != entsize1 | |
5075 | && (entsize2 == sizeof (Elf_External_Rel) | |
5076 | || entsize2 == sizeof (Elf_External_Rela))); | |
5077 | ||
5078 | rel_count2 = &esdo->rel_count2; | |
5079 | if (!same_size) | |
5080 | rel_count2 = &esdo->rel_count; | |
5081 | ||
5082 | /* The following is probably too simplistic if the | |
5083 | backend counts output relocs unusually. */ | |
5084 | BFD_ASSERT (bed->elf_backend_count_relocs == NULL); | |
5085 | alt_count = NUM_SHDR_ENTRIES (esdi->rel_hdr2); | |
5086 | *rel_count2 += alt_count; | |
5087 | reloc_count -= alt_count; | |
5088 | } | |
5089 | } | |
5090 | *rel_count1 += reloc_count; | |
252b5132 RH |
5091 | } |
5092 | ||
5093 | if (o->reloc_count > 0) | |
5094 | o->flags |= SEC_RELOC; | |
5095 | else | |
5096 | { | |
5097 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
5098 | set it (this is probably a bug) and if it is set | |
5099 | assign_section_numbers will create a reloc section. */ | |
5100 | o->flags &=~ SEC_RELOC; | |
5101 | } | |
5102 | ||
5103 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
5104 | zero. This is done in elf_fake_sections as well, but forcing | |
5105 | the VMA to 0 here will ensure that relocs against these | |
5106 | sections are handled correctly. */ | |
5107 | if ((o->flags & SEC_ALLOC) == 0 | |
5108 | && ! o->user_set_vma) | |
5109 | o->vma = 0; | |
5110 | } | |
5111 | ||
f5fa8ca2 JJ |
5112 | if (! info->relocateable && merged) |
5113 | elf_link_hash_traverse (elf_hash_table (info), | |
5114 | elf_link_sec_merge_syms, (PTR) abfd); | |
5115 | ||
252b5132 RH |
5116 | /* Figure out the file positions for everything but the symbol table |
5117 | and the relocs. We set symcount to force assign_section_numbers | |
5118 | to create a symbol table. */ | |
5119 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
5120 | BFD_ASSERT (! abfd->output_has_begun); | |
5121 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
5122 | goto error_return; | |
5123 | ||
5124 | /* That created the reloc sections. Set their sizes, and assign | |
5125 | them file positions, and allocate some buffers. */ | |
5126 | for (o = abfd->sections; o != NULL; o = o->next) | |
5127 | { | |
5128 | if ((o->flags & SEC_RELOC) != 0) | |
5129 | { | |
23bc299b MM |
5130 | if (!elf_link_size_reloc_section (abfd, |
5131 | &elf_section_data (o)->rel_hdr, | |
5132 | o)) | |
252b5132 RH |
5133 | goto error_return; |
5134 | ||
23bc299b MM |
5135 | if (elf_section_data (o)->rel_hdr2 |
5136 | && !elf_link_size_reloc_section (abfd, | |
5137 | elf_section_data (o)->rel_hdr2, | |
5138 | o)) | |
252b5132 | 5139 | goto error_return; |
252b5132 | 5140 | } |
b037af20 MM |
5141 | |
5142 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
3e932841 | 5143 | to count upwards while actually outputting the relocations. */ |
b037af20 MM |
5144 | elf_section_data (o)->rel_count = 0; |
5145 | elf_section_data (o)->rel_count2 = 0; | |
252b5132 RH |
5146 | } |
5147 | ||
5148 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
5149 | ||
5150 | /* We have now assigned file positions for all the sections except | |
5151 | .symtab and .strtab. We start the .symtab section at the current | |
5152 | file position, and write directly to it. We build the .strtab | |
5153 | section in memory. */ | |
5154 | bfd_get_symcount (abfd) = 0; | |
5155 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
5156 | /* sh_name is set in prep_headers. */ | |
5157 | symtab_hdr->sh_type = SHT_SYMTAB; | |
c97e73dd | 5158 | /* sh_flags, sh_addr and sh_size all start off zero. */ |
252b5132 RH |
5159 | symtab_hdr->sh_entsize = sizeof (Elf_External_Sym); |
5160 | /* sh_link is set in assign_section_numbers. */ | |
5161 | /* sh_info is set below. */ | |
5162 | /* sh_offset is set just below. */ | |
f0e1d18a | 5163 | symtab_hdr->sh_addralign = bed->s->file_align; |
252b5132 RH |
5164 | |
5165 | off = elf_tdata (abfd)->next_file_pos; | |
b34976b6 | 5166 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); |
252b5132 RH |
5167 | |
5168 | /* Note that at this point elf_tdata (abfd)->next_file_pos is | |
5169 | incorrect. We do not yet know the size of the .symtab section. | |
5170 | We correct next_file_pos below, after we do know the size. */ | |
5171 | ||
5172 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
5173 | continuously seeking to the right position in the file. */ | |
5174 | if (! info->keep_memory || max_sym_count < 20) | |
5175 | finfo.symbuf_size = 20; | |
5176 | else | |
5177 | finfo.symbuf_size = max_sym_count; | |
dc810e39 AM |
5178 | amt = finfo.symbuf_size; |
5179 | amt *= sizeof (Elf_External_Sym); | |
5180 | finfo.symbuf = (Elf_External_Sym *) bfd_malloc (amt); | |
252b5132 RH |
5181 | if (finfo.symbuf == NULL) |
5182 | goto error_return; | |
9ad5cbcf AM |
5183 | if (elf_numsections (abfd) > SHN_LORESERVE) |
5184 | { | |
c97e73dd AM |
5185 | /* Wild guess at number of output symbols. realloc'd as needed. */ |
5186 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
5187 | finfo.shndxbuf_size = amt; | |
9ad5cbcf | 5188 | amt *= sizeof (Elf_External_Sym_Shndx); |
c97e73dd | 5189 | finfo.symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
9ad5cbcf AM |
5190 | if (finfo.symshndxbuf == NULL) |
5191 | goto error_return; | |
5192 | } | |
252b5132 RH |
5193 | |
5194 | /* Start writing out the symbol table. The first symbol is always a | |
5195 | dummy symbol. */ | |
9317eacc CM |
5196 | if (info->strip != strip_all |
5197 | || emit_relocs) | |
252b5132 RH |
5198 | { |
5199 | elfsym.st_value = 0; | |
5200 | elfsym.st_size = 0; | |
5201 | elfsym.st_info = 0; | |
5202 | elfsym.st_other = 0; | |
5203 | elfsym.st_shndx = SHN_UNDEF; | |
5204 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5205 | &elfsym, bfd_und_section_ptr)) | |
5206 | goto error_return; | |
5207 | } | |
5208 | ||
5209 | #if 0 | |
5210 | /* Some standard ELF linkers do this, but we don't because it causes | |
5211 | bootstrap comparison failures. */ | |
5212 | /* Output a file symbol for the output file as the second symbol. | |
5213 | We output this even if we are discarding local symbols, although | |
5214 | I'm not sure if this is correct. */ | |
5215 | elfsym.st_value = 0; | |
5216 | elfsym.st_size = 0; | |
5217 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
5218 | elfsym.st_other = 0; | |
5219 | elfsym.st_shndx = SHN_ABS; | |
5220 | if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd), | |
5221 | &elfsym, bfd_abs_section_ptr)) | |
5222 | goto error_return; | |
5223 | #endif | |
5224 | ||
5225 | /* Output a symbol for each section. We output these even if we are | |
5226 | discarding local symbols, since they are used for relocs. These | |
5227 | symbols have no names. We store the index of each one in the | |
5228 | index field of the section, so that we can find it again when | |
5229 | outputting relocs. */ | |
9317eacc CM |
5230 | if (info->strip != strip_all |
5231 | || emit_relocs) | |
252b5132 RH |
5232 | { |
5233 | elfsym.st_size = 0; | |
5234 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5235 | elfsym.st_other = 0; | |
9ad5cbcf | 5236 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5237 | { |
5238 | o = section_from_elf_index (abfd, i); | |
5239 | if (o != NULL) | |
5240 | o->target_index = bfd_get_symcount (abfd); | |
5241 | elfsym.st_shndx = i; | |
7ad34365 | 5242 | if (info->relocateable || o == NULL) |
252b5132 RH |
5243 | elfsym.st_value = 0; |
5244 | else | |
5245 | elfsym.st_value = o->vma; | |
5246 | if (! elf_link_output_sym (&finfo, (const char *) NULL, | |
5247 | &elfsym, o)) | |
5248 | goto error_return; | |
c97e73dd | 5249 | if (i == SHN_LORESERVE - 1) |
9ad5cbcf | 5250 | i += SHN_HIRESERVE + 1 - SHN_LORESERVE; |
252b5132 RH |
5251 | } |
5252 | } | |
5253 | ||
5254 | /* Allocate some memory to hold information read in from the input | |
5255 | files. */ | |
9ad5cbcf AM |
5256 | if (max_contents_size != 0) |
5257 | { | |
5258 | finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); | |
5259 | if (finfo.contents == NULL) | |
5260 | goto error_return; | |
5261 | } | |
5262 | ||
5263 | if (max_external_reloc_size != 0) | |
5264 | { | |
5265 | finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size); | |
5266 | if (finfo.external_relocs == NULL) | |
5267 | goto error_return; | |
5268 | } | |
5269 | ||
5270 | if (max_internal_reloc_count != 0) | |
5271 | { | |
5272 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
5273 | amt *= sizeof (Elf_Internal_Rela); | |
5274 | finfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); | |
5275 | if (finfo.internal_relocs == NULL) | |
5276 | goto error_return; | |
5277 | } | |
5278 | ||
5279 | if (max_sym_count != 0) | |
5280 | { | |
5281 | amt = max_sym_count * sizeof (Elf_External_Sym); | |
5282 | finfo.external_syms = (Elf_External_Sym *) bfd_malloc (amt); | |
5283 | if (finfo.external_syms == NULL) | |
5284 | goto error_return; | |
5285 | ||
5286 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
5287 | finfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); | |
5288 | if (finfo.internal_syms == NULL) | |
5289 | goto error_return; | |
5290 | ||
5291 | amt = max_sym_count * sizeof (long); | |
5292 | finfo.indices = (long *) bfd_malloc (amt); | |
5293 | if (finfo.indices == NULL) | |
5294 | goto error_return; | |
5295 | ||
5296 | amt = max_sym_count * sizeof (asection *); | |
5297 | finfo.sections = (asection **) bfd_malloc (amt); | |
5298 | if (finfo.sections == NULL) | |
5299 | goto error_return; | |
5300 | } | |
5301 | ||
5302 | if (max_sym_shndx_count != 0) | |
5303 | { | |
5304 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
5305 | finfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); | |
5306 | if (finfo.locsym_shndx == NULL) | |
5307 | goto error_return; | |
5308 | } | |
252b5132 | 5309 | |
13ae64f3 JJ |
5310 | if (finfo.first_tls_sec) |
5311 | { | |
5312 | unsigned int align = 0; | |
5313 | bfd_vma base = finfo.first_tls_sec->vma, end = 0; | |
5314 | asection *sec; | |
5315 | ||
5316 | for (sec = finfo.first_tls_sec; | |
5317 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
5318 | sec = sec->next) | |
5319 | { | |
5320 | bfd_vma size = sec->_raw_size; | |
5321 | ||
5322 | if (bfd_get_section_alignment (abfd, sec) > align) | |
5323 | align = bfd_get_section_alignment (abfd, sec); | |
5324 | if (sec->_raw_size == 0 && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
5325 | { | |
5326 | struct bfd_link_order *o; | |
5327 | ||
5328 | size = 0; | |
5329 | for (o = sec->link_order_head; o != NULL; o = o->next) | |
5330 | if (size < o->offset + o->size) | |
58821868 | 5331 | size = o->offset + o->size; |
13ae64f3 JJ |
5332 | } |
5333 | end = sec->vma + size; | |
5334 | } | |
5335 | elf_hash_table (info)->tls_segment | |
5336 | = bfd_zalloc (abfd, sizeof (struct elf_link_tls_segment)); | |
5337 | if (elf_hash_table (info)->tls_segment == NULL) | |
5338 | goto error_return; | |
5339 | elf_hash_table (info)->tls_segment->start = base; | |
5340 | elf_hash_table (info)->tls_segment->size = end - base; | |
5341 | elf_hash_table (info)->tls_segment->align = align; | |
5342 | } | |
5343 | ||
252b5132 RH |
5344 | /* Since ELF permits relocations to be against local symbols, we |
5345 | must have the local symbols available when we do the relocations. | |
5346 | Since we would rather only read the local symbols once, and we | |
5347 | would rather not keep them in memory, we handle all the | |
5348 | relocations for a single input file at the same time. | |
5349 | ||
5350 | Unfortunately, there is no way to know the total number of local | |
5351 | symbols until we have seen all of them, and the local symbol | |
5352 | indices precede the global symbol indices. This means that when | |
5353 | we are generating relocateable output, and we see a reloc against | |
5354 | a global symbol, we can not know the symbol index until we have | |
5355 | finished examining all the local symbols to see which ones we are | |
5356 | going to output. To deal with this, we keep the relocations in | |
5357 | memory, and don't output them until the end of the link. This is | |
5358 | an unfortunate waste of memory, but I don't see a good way around | |
5359 | it. Fortunately, it only happens when performing a relocateable | |
5360 | link, which is not the common case. FIXME: If keep_memory is set | |
5361 | we could write the relocs out and then read them again; I don't | |
5362 | know how bad the memory loss will be. */ | |
5363 | ||
5364 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
b34976b6 | 5365 | sub->output_has_begun = FALSE; |
252b5132 RH |
5366 | for (o = abfd->sections; o != NULL; o = o->next) |
5367 | { | |
5368 | for (p = o->link_order_head; p != NULL; p = p->next) | |
5369 | { | |
5370 | if (p->type == bfd_indirect_link_order | |
a50c1845 | 5371 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) |
4ddafab0 | 5372 | == bfd_target_elf_flavour) |
a50c1845 | 5373 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) |
252b5132 | 5374 | { |
252b5132 RH |
5375 | if (! sub->output_has_begun) |
5376 | { | |
5377 | if (! elf_link_input_bfd (&finfo, sub)) | |
5378 | goto error_return; | |
b34976b6 | 5379 | sub->output_has_begun = TRUE; |
252b5132 RH |
5380 | } |
5381 | } | |
5382 | else if (p->type == bfd_section_reloc_link_order | |
5383 | || p->type == bfd_symbol_reloc_link_order) | |
5384 | { | |
5385 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
5386 | goto error_return; | |
5387 | } | |
5388 | else | |
5389 | { | |
5390 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
5391 | goto error_return; | |
5392 | } | |
5393 | } | |
5394 | } | |
5395 | ||
c44233aa AM |
5396 | /* Output any global symbols that got converted to local in a |
5397 | version script or due to symbol visibility. We do this in a | |
5398 | separate step since ELF requires all local symbols to appear | |
5399 | prior to any global symbols. FIXME: We should only do this if | |
5400 | some global symbols were, in fact, converted to become local. | |
5401 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
b34976b6 | 5402 | eoinfo.failed = FALSE; |
c44233aa | 5403 | eoinfo.finfo = &finfo; |
b34976b6 | 5404 | eoinfo.localsyms = TRUE; |
c44233aa AM |
5405 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, |
5406 | (PTR) &eoinfo); | |
5407 | if (eoinfo.failed) | |
b34976b6 | 5408 | return FALSE; |
c44233aa | 5409 | |
252b5132 | 5410 | /* That wrote out all the local symbols. Finish up the symbol table |
5cc7c785 L |
5411 | with the global symbols. Even if we want to strip everything we |
5412 | can, we still need to deal with those global symbols that got | |
3e932841 | 5413 | converted to local in a version script. */ |
252b5132 | 5414 | |
30b30c21 | 5415 | /* The sh_info field records the index of the first non local symbol. */ |
252b5132 | 5416 | symtab_hdr->sh_info = bfd_get_symcount (abfd); |
30b30c21 | 5417 | |
fc8c40a0 AM |
5418 | if (dynamic |
5419 | && finfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
30b30c21 RH |
5420 | { |
5421 | Elf_Internal_Sym sym; | |
5422 | Elf_External_Sym *dynsym = | |
a7b97311 | 5423 | (Elf_External_Sym *) finfo.dynsym_sec->contents; |
71a40b32 | 5424 | long last_local = 0; |
30b30c21 RH |
5425 | |
5426 | /* Write out the section symbols for the output sections. */ | |
5427 | if (info->shared) | |
5428 | { | |
5429 | asection *s; | |
5430 | ||
5431 | sym.st_size = 0; | |
5432 | sym.st_name = 0; | |
5433 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
5434 | sym.st_other = 0; | |
5435 | ||
5436 | for (s = abfd->sections; s != NULL; s = s->next) | |
5437 | { | |
5438 | int indx; | |
9ad5cbcf AM |
5439 | Elf_External_Sym *dest; |
5440 | ||
30b30c21 RH |
5441 | indx = elf_section_data (s)->this_idx; |
5442 | BFD_ASSERT (indx > 0); | |
5443 | sym.st_shndx = indx; | |
5444 | sym.st_value = s->vma; | |
9ad5cbcf AM |
5445 | dest = dynsym + elf_section_data (s)->dynindx; |
5446 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5447 | } |
5448 | ||
5449 | last_local = bfd_count_sections (abfd); | |
5450 | } | |
5451 | ||
5452 | /* Write out the local dynsyms. */ | |
5453 | if (elf_hash_table (info)->dynlocal) | |
5454 | { | |
5455 | struct elf_link_local_dynamic_entry *e; | |
5456 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
5457 | { | |
318da145 | 5458 | asection *s; |
9ad5cbcf | 5459 | Elf_External_Sym *dest; |
30b30c21 | 5460 | |
b037af20 MM |
5461 | sym.st_size = e->isym.st_size; |
5462 | sym.st_other = e->isym.st_other; | |
5463 | ||
1fa0ddb3 RH |
5464 | /* Copy the internal symbol as is. |
5465 | Note that we saved a word of storage and overwrote | |
c44233aa AM |
5466 | the original st_name with the dynstr_index. */ |
5467 | sym = e->isym; | |
30b30c21 | 5468 | |
c8e5ddc8 | 5469 | if (e->isym.st_shndx != SHN_UNDEF |
58821868 AM |
5470 | && (e->isym.st_shndx < SHN_LORESERVE |
5471 | || e->isym.st_shndx > SHN_HIRESERVE)) | |
587ff49e RH |
5472 | { |
5473 | s = bfd_section_from_elf_index (e->input_bfd, | |
5474 | e->isym.st_shndx); | |
5475 | ||
5476 | sym.st_shndx = | |
5477 | elf_section_data (s->output_section)->this_idx; | |
5478 | sym.st_value = (s->output_section->vma | |
5479 | + s->output_offset | |
5480 | + e->isym.st_value); | |
5481 | } | |
30b30c21 RH |
5482 | |
5483 | if (last_local < e->dynindx) | |
5484 | last_local = e->dynindx; | |
5485 | ||
9ad5cbcf AM |
5486 | dest = dynsym + e->dynindx; |
5487 | elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0); | |
30b30c21 RH |
5488 | } |
5489 | } | |
5490 | ||
71a40b32 ILT |
5491 | elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = |
5492 | last_local + 1; | |
30b30c21 | 5493 | } |
252b5132 RH |
5494 | |
5495 | /* We get the global symbols from the hash table. */ | |
b34976b6 AM |
5496 | eoinfo.failed = FALSE; |
5497 | eoinfo.localsyms = FALSE; | |
252b5132 RH |
5498 | eoinfo.finfo = &finfo; |
5499 | elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym, | |
5500 | (PTR) &eoinfo); | |
5501 | if (eoinfo.failed) | |
b34976b6 | 5502 | return FALSE; |
252b5132 | 5503 | |
587ff49e RH |
5504 | /* If backend needs to output some symbols not present in the hash |
5505 | table, do it now. */ | |
5506 | if (bed->elf_backend_output_arch_syms) | |
5507 | { | |
b34976b6 AM |
5508 | typedef bfd_boolean (*out_sym_func) |
5509 | PARAMS ((PTR, const char *, Elf_Internal_Sym *, asection *)); | |
dc810e39 AM |
5510 | |
5511 | if (! ((*bed->elf_backend_output_arch_syms) | |
5512 | (abfd, info, (PTR) &finfo, (out_sym_func) elf_link_output_sym))) | |
b34976b6 | 5513 | return FALSE; |
3e932841 | 5514 | } |
587ff49e | 5515 | |
252b5132 RH |
5516 | /* Flush all symbols to the file. */ |
5517 | if (! elf_link_flush_output_syms (&finfo)) | |
b34976b6 | 5518 | return FALSE; |
252b5132 RH |
5519 | |
5520 | /* Now we know the size of the symtab section. */ | |
5521 | off += symtab_hdr->sh_size; | |
5522 | ||
c97e73dd AM |
5523 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; |
5524 | if (symtab_shndx_hdr->sh_name != 0) | |
5525 | { | |
5526 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
5527 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
5528 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
5529 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
5530 | symtab_shndx_hdr->sh_size = amt; | |
5531 | ||
5532 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
b34976b6 | 5533 | off, TRUE); |
c97e73dd AM |
5534 | |
5535 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
5536 | || (bfd_bwrite ((PTR) finfo.symshndxbuf, amt, abfd) != amt)) | |
b34976b6 | 5537 | return FALSE; |
c97e73dd AM |
5538 | } |
5539 | ||
5540 | ||
252b5132 RH |
5541 | /* Finish up and write out the symbol string table (.strtab) |
5542 | section. */ | |
5543 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
5544 | /* sh_name was set in prep_headers. */ | |
5545 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
5546 | symstrtab_hdr->sh_flags = 0; | |
5547 | symstrtab_hdr->sh_addr = 0; | |
5548 | symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab); | |
5549 | symstrtab_hdr->sh_entsize = 0; | |
5550 | symstrtab_hdr->sh_link = 0; | |
5551 | symstrtab_hdr->sh_info = 0; | |
5552 | /* sh_offset is set just below. */ | |
5553 | symstrtab_hdr->sh_addralign = 1; | |
5554 | ||
b34976b6 | 5555 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); |
252b5132 RH |
5556 | elf_tdata (abfd)->next_file_pos = off; |
5557 | ||
5558 | if (bfd_get_symcount (abfd) > 0) | |
5559 | { | |
5560 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
5561 | || ! _bfd_stringtab_emit (abfd, finfo.symstrtab)) | |
b34976b6 | 5562 | return FALSE; |
252b5132 RH |
5563 | } |
5564 | ||
5565 | /* Adjust the relocs to have the correct symbol indices. */ | |
5566 | for (o = abfd->sections; o != NULL; o = o->next) | |
5567 | { | |
252b5132 RH |
5568 | if ((o->flags & SEC_RELOC) == 0) |
5569 | continue; | |
5570 | ||
3e932841 | 5571 | elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr, |
31367b81 MM |
5572 | elf_section_data (o)->rel_count, |
5573 | elf_section_data (o)->rel_hashes); | |
5574 | if (elf_section_data (o)->rel_hdr2 != NULL) | |
5575 | elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2, | |
5576 | elf_section_data (o)->rel_count2, | |
3e932841 | 5577 | (elf_section_data (o)->rel_hashes |
31367b81 | 5578 | + elf_section_data (o)->rel_count)); |
252b5132 RH |
5579 | |
5580 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
5581 | trying to swap the relocs out itself. */ | |
5582 | o->reloc_count = 0; | |
5583 | } | |
5584 | ||
db6751f2 JJ |
5585 | if (dynamic && info->combreloc && dynobj != NULL) |
5586 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
5587 | ||
252b5132 RH |
5588 | /* If we are linking against a dynamic object, or generating a |
5589 | shared library, finish up the dynamic linking information. */ | |
5590 | if (dynamic) | |
5591 | { | |
5592 | Elf_External_Dyn *dyncon, *dynconend; | |
5593 | ||
5594 | /* Fix up .dynamic entries. */ | |
5595 | o = bfd_get_section_by_name (dynobj, ".dynamic"); | |
5596 | BFD_ASSERT (o != NULL); | |
5597 | ||
5598 | dyncon = (Elf_External_Dyn *) o->contents; | |
5599 | dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size); | |
5600 | for (; dyncon < dynconend; dyncon++) | |
5601 | { | |
5602 | Elf_Internal_Dyn dyn; | |
5603 | const char *name; | |
5604 | unsigned int type; | |
5605 | ||
5606 | elf_swap_dyn_in (dynobj, dyncon, &dyn); | |
5607 | ||
5608 | switch (dyn.d_tag) | |
5609 | { | |
5610 | default: | |
5611 | break; | |
db6751f2 JJ |
5612 | case DT_NULL: |
5613 | if (relativecount > 0 && dyncon + 1 < dynconend) | |
5614 | { | |
5615 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
5616 | { | |
5617 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
5618 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
5619 | default: break; | |
5620 | } | |
5621 | if (dyn.d_tag != DT_NULL) | |
5622 | { | |
5623 | dyn.d_un.d_val = relativecount; | |
5624 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5625 | relativecount = 0; | |
5626 | } | |
5627 | } | |
5628 | break; | |
252b5132 | 5629 | case DT_INIT: |
f0c2e336 | 5630 | name = info->init_function; |
252b5132 RH |
5631 | goto get_sym; |
5632 | case DT_FINI: | |
f0c2e336 | 5633 | name = info->fini_function; |
252b5132 RH |
5634 | get_sym: |
5635 | { | |
5636 | struct elf_link_hash_entry *h; | |
5637 | ||
5638 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 5639 | FALSE, FALSE, TRUE); |
252b5132 RH |
5640 | if (h != NULL |
5641 | && (h->root.type == bfd_link_hash_defined | |
5642 | || h->root.type == bfd_link_hash_defweak)) | |
5643 | { | |
5644 | dyn.d_un.d_val = h->root.u.def.value; | |
5645 | o = h->root.u.def.section; | |
5646 | if (o->output_section != NULL) | |
5647 | dyn.d_un.d_val += (o->output_section->vma | |
5648 | + o->output_offset); | |
5649 | else | |
5650 | { | |
5651 | /* The symbol is imported from another shared | |
5652 | library and does not apply to this one. */ | |
5653 | dyn.d_un.d_val = 0; | |
5654 | } | |
5655 | ||
5656 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5657 | } | |
5658 | } | |
5659 | break; | |
5660 | ||
30831527 RH |
5661 | case DT_PREINIT_ARRAYSZ: |
5662 | name = ".preinit_array"; | |
5663 | goto get_size; | |
5664 | case DT_INIT_ARRAYSZ: | |
5665 | name = ".init_array"; | |
5666 | goto get_size; | |
5667 | case DT_FINI_ARRAYSZ: | |
5668 | name = ".fini_array"; | |
5669 | get_size: | |
5670 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5671 | if (o == NULL) |
5672 | { | |
5673 | (*_bfd_error_handler) | |
5674 | (_("%s: could not find output section %s"), | |
5675 | bfd_get_filename (abfd), name); | |
5676 | goto error_return; | |
5677 | } | |
25e27870 L |
5678 | if (o->_raw_size == 0) |
5679 | (*_bfd_error_handler) | |
5680 | (_("warning: %s section has zero size"), name); | |
30831527 RH |
5681 | dyn.d_un.d_val = o->_raw_size; |
5682 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5683 | break; | |
5684 | ||
5685 | case DT_PREINIT_ARRAY: | |
5686 | name = ".preinit_array"; | |
5687 | goto get_vma; | |
5688 | case DT_INIT_ARRAY: | |
5689 | name = ".init_array"; | |
5690 | goto get_vma; | |
5691 | case DT_FINI_ARRAY: | |
5692 | name = ".fini_array"; | |
5693 | goto get_vma; | |
5694 | ||
252b5132 RH |
5695 | case DT_HASH: |
5696 | name = ".hash"; | |
5697 | goto get_vma; | |
5698 | case DT_STRTAB: | |
5699 | name = ".dynstr"; | |
5700 | goto get_vma; | |
5701 | case DT_SYMTAB: | |
5702 | name = ".dynsym"; | |
5703 | goto get_vma; | |
5704 | case DT_VERDEF: | |
5705 | name = ".gnu.version_d"; | |
5706 | goto get_vma; | |
5707 | case DT_VERNEED: | |
5708 | name = ".gnu.version_r"; | |
5709 | goto get_vma; | |
5710 | case DT_VERSYM: | |
5711 | name = ".gnu.version"; | |
5712 | get_vma: | |
5713 | o = bfd_get_section_by_name (abfd, name); | |
2cb69dd3 JL |
5714 | if (o == NULL) |
5715 | { | |
5716 | (*_bfd_error_handler) | |
5717 | (_("%s: could not find output section %s"), | |
5718 | bfd_get_filename (abfd), name); | |
5719 | goto error_return; | |
5720 | } | |
252b5132 RH |
5721 | dyn.d_un.d_ptr = o->vma; |
5722 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5723 | break; | |
5724 | ||
5725 | case DT_REL: | |
5726 | case DT_RELA: | |
5727 | case DT_RELSZ: | |
5728 | case DT_RELASZ: | |
5729 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
5730 | type = SHT_REL; | |
5731 | else | |
5732 | type = SHT_RELA; | |
5733 | dyn.d_un.d_val = 0; | |
9ad5cbcf | 5734 | for (i = 1; i < elf_numsections (abfd); i++) |
252b5132 RH |
5735 | { |
5736 | Elf_Internal_Shdr *hdr; | |
5737 | ||
5738 | hdr = elf_elfsections (abfd)[i]; | |
5739 | if (hdr->sh_type == type | |
5740 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
5741 | { | |
5742 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
5743 | dyn.d_un.d_val += hdr->sh_size; | |
5744 | else | |
5745 | { | |
5746 | if (dyn.d_un.d_val == 0 | |
5747 | || hdr->sh_addr < dyn.d_un.d_val) | |
5748 | dyn.d_un.d_val = hdr->sh_addr; | |
5749 | } | |
5750 | } | |
5751 | } | |
5752 | elf_swap_dyn_out (dynobj, &dyn, dyncon); | |
5753 | break; | |
5754 | } | |
5755 | } | |
5756 | } | |
5757 | ||
5758 | /* If we have created any dynamic sections, then output them. */ | |
5759 | if (dynobj != NULL) | |
5760 | { | |
5761 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
5762 | goto error_return; | |
5763 | ||
5764 | for (o = dynobj->sections; o != NULL; o = o->next) | |
5765 | { | |
5766 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
fc8c40a0 AM |
5767 | || o->_raw_size == 0 |
5768 | || o->output_section == bfd_abs_section_ptr) | |
252b5132 RH |
5769 | continue; |
5770 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
5771 | { | |
5772 | /* At this point, we are only interested in sections | |
c44233aa | 5773 | created by elf_link_create_dynamic_sections. */ |
252b5132 RH |
5774 | continue; |
5775 | } | |
5776 | if ((elf_section_data (o->output_section)->this_hdr.sh_type | |
5777 | != SHT_STRTAB) | |
5778 | || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0) | |
5779 | { | |
5780 | if (! bfd_set_section_contents (abfd, o->output_section, | |
dc810e39 AM |
5781 | o->contents, |
5782 | (file_ptr) o->output_offset, | |
252b5132 RH |
5783 | o->_raw_size)) |
5784 | goto error_return; | |
5785 | } | |
5786 | else | |
5787 | { | |
252b5132 | 5788 | /* The contents of the .dynstr section are actually in a |
c44233aa | 5789 | stringtab. */ |
252b5132 RH |
5790 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
5791 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
2b0f7ef9 JJ |
5792 | || ! _bfd_elf_strtab_emit (abfd, |
5793 | elf_hash_table (info)->dynstr)) | |
252b5132 RH |
5794 | goto error_return; |
5795 | } | |
5796 | } | |
5797 | } | |
5798 | ||
1126897b AM |
5799 | if (info->relocateable) |
5800 | { | |
b34976b6 | 5801 | bfd_boolean failed = FALSE; |
1126897b AM |
5802 | |
5803 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
5804 | if (failed) | |
5805 | goto error_return; | |
5806 | } | |
5807 | ||
252b5132 RH |
5808 | /* If we have optimized stabs strings, output them. */ |
5809 | if (elf_hash_table (info)->stab_info != NULL) | |
5810 | { | |
5811 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
5812 | goto error_return; | |
5813 | } | |
5814 | ||
126495ed | 5815 | if (info->eh_frame_hdr) |
65765700 | 5816 | { |
126495ed AM |
5817 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
5818 | goto error_return; | |
65765700 JJ |
5819 | } |
5820 | ||
252b5132 RH |
5821 | if (finfo.symstrtab != NULL) |
5822 | _bfd_stringtab_free (finfo.symstrtab); | |
5823 | if (finfo.contents != NULL) | |
5824 | free (finfo.contents); | |
5825 | if (finfo.external_relocs != NULL) | |
5826 | free (finfo.external_relocs); | |
5827 | if (finfo.internal_relocs != NULL) | |
5828 | free (finfo.internal_relocs); | |
5829 | if (finfo.external_syms != NULL) | |
5830 | free (finfo.external_syms); | |
9ad5cbcf AM |
5831 | if (finfo.locsym_shndx != NULL) |
5832 | free (finfo.locsym_shndx); | |
252b5132 RH |
5833 | if (finfo.internal_syms != NULL) |
5834 | free (finfo.internal_syms); | |
5835 | if (finfo.indices != NULL) | |
5836 | free (finfo.indices); | |
5837 | if (finfo.sections != NULL) | |
5838 | free (finfo.sections); | |
5839 | if (finfo.symbuf != NULL) | |
5840 | free (finfo.symbuf); | |
9ad5cbcf | 5841 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 5842 | free (finfo.symshndxbuf); |
252b5132 RH |
5843 | for (o = abfd->sections; o != NULL; o = o->next) |
5844 | { | |
5845 | if ((o->flags & SEC_RELOC) != 0 | |
5846 | && elf_section_data (o)->rel_hashes != NULL) | |
c44233aa | 5847 | free (elf_section_data (o)->rel_hashes); |
252b5132 RH |
5848 | } |
5849 | ||
b34976b6 | 5850 | elf_tdata (abfd)->linker = TRUE; |
252b5132 | 5851 | |
b34976b6 | 5852 | return TRUE; |
252b5132 RH |
5853 | |
5854 | error_return: | |
5855 | if (finfo.symstrtab != NULL) | |
5856 | _bfd_stringtab_free (finfo.symstrtab); | |
5857 | if (finfo.contents != NULL) | |
5858 | free (finfo.contents); | |
5859 | if (finfo.external_relocs != NULL) | |
5860 | free (finfo.external_relocs); | |
5861 | if (finfo.internal_relocs != NULL) | |
5862 | free (finfo.internal_relocs); | |
5863 | if (finfo.external_syms != NULL) | |
5864 | free (finfo.external_syms); | |
9ad5cbcf AM |
5865 | if (finfo.locsym_shndx != NULL) |
5866 | free (finfo.locsym_shndx); | |
252b5132 RH |
5867 | if (finfo.internal_syms != NULL) |
5868 | free (finfo.internal_syms); | |
5869 | if (finfo.indices != NULL) | |
5870 | free (finfo.indices); | |
5871 | if (finfo.sections != NULL) | |
5872 | free (finfo.sections); | |
5873 | if (finfo.symbuf != NULL) | |
5874 | free (finfo.symbuf); | |
9ad5cbcf | 5875 | if (finfo.symshndxbuf != NULL) |
c97e73dd | 5876 | free (finfo.symshndxbuf); |
252b5132 RH |
5877 | for (o = abfd->sections; o != NULL; o = o->next) |
5878 | { | |
5879 | if ((o->flags & SEC_RELOC) != 0 | |
5880 | && elf_section_data (o)->rel_hashes != NULL) | |
5881 | free (elf_section_data (o)->rel_hashes); | |
5882 | } | |
5883 | ||
b34976b6 | 5884 | return FALSE; |
252b5132 RH |
5885 | } |
5886 | ||
5887 | /* Add a symbol to the output symbol table. */ | |
5888 | ||
b34976b6 | 5889 | static bfd_boolean |
252b5132 RH |
5890 | elf_link_output_sym (finfo, name, elfsym, input_sec) |
5891 | struct elf_final_link_info *finfo; | |
5892 | const char *name; | |
5893 | Elf_Internal_Sym *elfsym; | |
5894 | asection *input_sec; | |
5895 | { | |
9ad5cbcf AM |
5896 | Elf_External_Sym *dest; |
5897 | Elf_External_Sym_Shndx *destshndx; | |
b34976b6 AM |
5898 | bfd_boolean (*output_symbol_hook) |
5899 | PARAMS ((bfd *, struct bfd_link_info *info, const char *, | |
5900 | Elf_Internal_Sym *, asection *)); | |
252b5132 RH |
5901 | |
5902 | output_symbol_hook = get_elf_backend_data (finfo->output_bfd)-> | |
5903 | elf_backend_link_output_symbol_hook; | |
5904 | if (output_symbol_hook != NULL) | |
5905 | { | |
5906 | if (! ((*output_symbol_hook) | |
5907 | (finfo->output_bfd, finfo->info, name, elfsym, input_sec))) | |
b34976b6 | 5908 | return FALSE; |
252b5132 RH |
5909 | } |
5910 | ||
5911 | if (name == (const char *) NULL || *name == '\0') | |
5912 | elfsym->st_name = 0; | |
5913 | else if (input_sec->flags & SEC_EXCLUDE) | |
5914 | elfsym->st_name = 0; | |
5915 | else | |
5916 | { | |
5917 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab, | |
b34976b6 | 5918 | name, TRUE, FALSE); |
252b5132 | 5919 | if (elfsym->st_name == (unsigned long) -1) |
b34976b6 | 5920 | return FALSE; |
252b5132 RH |
5921 | } |
5922 | ||
5923 | if (finfo->symbuf_count >= finfo->symbuf_size) | |
5924 | { | |
5925 | if (! elf_link_flush_output_syms (finfo)) | |
b34976b6 | 5926 | return FALSE; |
252b5132 RH |
5927 | } |
5928 | ||
9ad5cbcf AM |
5929 | dest = finfo->symbuf + finfo->symbuf_count; |
5930 | destshndx = finfo->symshndxbuf; | |
5931 | if (destshndx != NULL) | |
c97e73dd AM |
5932 | { |
5933 | if (bfd_get_symcount (finfo->output_bfd) >= finfo->shndxbuf_size) | |
5934 | { | |
5935 | bfd_size_type amt; | |
252b5132 | 5936 | |
c97e73dd AM |
5937 | amt = finfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); |
5938 | finfo->symshndxbuf = destshndx = bfd_realloc (destshndx, amt * 2); | |
5939 | if (destshndx == NULL) | |
b34976b6 | 5940 | return FALSE; |
c97e73dd AM |
5941 | memset ((char *) destshndx + amt, 0, amt); |
5942 | finfo->shndxbuf_size *= 2; | |
5943 | } | |
5944 | destshndx += bfd_get_symcount (finfo->output_bfd); | |
5945 | } | |
5946 | ||
5947 | elf_swap_symbol_out (finfo->output_bfd, elfsym, (PTR) dest, (PTR) destshndx); | |
5948 | finfo->symbuf_count += 1; | |
5949 | bfd_get_symcount (finfo->output_bfd) += 1; | |
252b5132 | 5950 | |
b34976b6 | 5951 | return TRUE; |
252b5132 RH |
5952 | } |
5953 | ||
5954 | /* Flush the output symbols to the file. */ | |
5955 | ||
b34976b6 | 5956 | static bfd_boolean |
252b5132 RH |
5957 | elf_link_flush_output_syms (finfo) |
5958 | struct elf_final_link_info *finfo; | |
5959 | { | |
5960 | if (finfo->symbuf_count > 0) | |
5961 | { | |
9ad5cbcf | 5962 | Elf_Internal_Shdr *hdr; |
dc810e39 AM |
5963 | file_ptr pos; |
5964 | bfd_size_type amt; | |
252b5132 | 5965 | |
9ad5cbcf AM |
5966 | hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr; |
5967 | pos = hdr->sh_offset + hdr->sh_size; | |
dc810e39 AM |
5968 | amt = finfo->symbuf_count * sizeof (Elf_External_Sym); |
5969 | if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0 | |
5970 | || bfd_bwrite ((PTR) finfo->symbuf, amt, finfo->output_bfd) != amt) | |
b34976b6 | 5971 | return FALSE; |
252b5132 | 5972 | |
9ad5cbcf | 5973 | hdr->sh_size += amt; |
252b5132 RH |
5974 | finfo->symbuf_count = 0; |
5975 | } | |
5976 | ||
b34976b6 | 5977 | return TRUE; |
252b5132 RH |
5978 | } |
5979 | ||
f5fa8ca2 JJ |
5980 | /* Adjust all external symbols pointing into SEC_MERGE sections |
5981 | to reflect the object merging within the sections. */ | |
5982 | ||
b34976b6 | 5983 | static bfd_boolean |
f5fa8ca2 JJ |
5984 | elf_link_sec_merge_syms (h, data) |
5985 | struct elf_link_hash_entry *h; | |
5986 | PTR data; | |
5987 | { | |
5988 | asection *sec; | |
5989 | ||
e92d460e AM |
5990 | if (h->root.type == bfd_link_hash_warning) |
5991 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5992 | ||
f5fa8ca2 JJ |
5993 | if ((h->root.type == bfd_link_hash_defined |
5994 | || h->root.type == bfd_link_hash_defweak) | |
5995 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
68bfbfcc | 5996 | && sec->sec_info_type == ELF_INFO_TYPE_MERGE) |
f5fa8ca2 JJ |
5997 | { |
5998 | bfd *output_bfd = (bfd *) data; | |
5999 | ||
6000 | h->root.u.def.value = | |
6001 | _bfd_merged_section_offset (output_bfd, | |
6002 | &h->root.u.def.section, | |
65765700 | 6003 | elf_section_data (sec)->sec_info, |
f5fa8ca2 JJ |
6004 | h->root.u.def.value, (bfd_vma) 0); |
6005 | } | |
6006 | ||
b34976b6 | 6007 | return TRUE; |
f5fa8ca2 JJ |
6008 | } |
6009 | ||
f5d44ba0 AM |
6010 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
6011 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
6012 | versioned symbol that would normally require an explicit version. */ | |
6013 | ||
b34976b6 | 6014 | static bfd_boolean |
f5d44ba0 AM |
6015 | elf_link_check_versioned_symbol (info, h) |
6016 | struct bfd_link_info *info; | |
6017 | struct elf_link_hash_entry *h; | |
6018 | { | |
6019 | bfd *undef_bfd = h->root.u.undef.abfd; | |
6020 | struct elf_link_loaded_list *loaded; | |
f5d44ba0 AM |
6021 | |
6022 | if ((undef_bfd->flags & DYNAMIC) == 0 | |
6023 | || info->hash->creator->flavour != bfd_target_elf_flavour | |
6024 | || elf_dt_soname (h->root.u.undef.abfd) == NULL) | |
b34976b6 | 6025 | return FALSE; |
f5d44ba0 AM |
6026 | |
6027 | for (loaded = elf_hash_table (info)->loaded; | |
6028 | loaded != NULL; | |
6029 | loaded = loaded->next) | |
6030 | { | |
6031 | bfd *input; | |
6032 | Elf_Internal_Shdr *hdr; | |
6033 | bfd_size_type symcount; | |
6034 | bfd_size_type extsymcount; | |
6035 | bfd_size_type extsymoff; | |
6036 | Elf_Internal_Shdr *versymhdr; | |
6cdc0ccc AM |
6037 | Elf_Internal_Sym *isym; |
6038 | Elf_Internal_Sym *isymend; | |
6039 | Elf_Internal_Sym *isymbuf; | |
f5d44ba0 | 6040 | Elf_External_Versym *ever; |
6cdc0ccc | 6041 | Elf_External_Versym *extversym; |
f5d44ba0 AM |
6042 | |
6043 | input = loaded->abfd; | |
6044 | ||
6045 | /* We check each DSO for a possible hidden versioned definition. */ | |
6046 | if (input == undef_bfd | |
6047 | || (input->flags & DYNAMIC) == 0 | |
6048 | || elf_dynversym (input) == 0) | |
6049 | continue; | |
6050 | ||
6051 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
6052 | ||
6053 | symcount = hdr->sh_size / sizeof (Elf_External_Sym); | |
6054 | if (elf_bad_symtab (input)) | |
6055 | { | |
6056 | extsymcount = symcount; | |
6057 | extsymoff = 0; | |
6058 | } | |
6059 | else | |
6060 | { | |
6061 | extsymcount = symcount - hdr->sh_info; | |
6062 | extsymoff = hdr->sh_info; | |
6063 | } | |
6064 | ||
6065 | if (extsymcount == 0) | |
6066 | continue; | |
6067 | ||
6cdc0ccc AM |
6068 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, |
6069 | NULL, NULL, NULL); | |
6070 | if (isymbuf == NULL) | |
b34976b6 | 6071 | return FALSE; |
f5d44ba0 | 6072 | |
f5d44ba0 AM |
6073 | /* Read in any version definitions. */ |
6074 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
6075 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); | |
6076 | if (extversym == NULL) | |
6077 | goto error_ret; | |
6078 | ||
6079 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
6080 | || (bfd_bread ((PTR) extversym, versymhdr->sh_size, input) | |
6081 | != versymhdr->sh_size)) | |
6082 | { | |
6083 | free (extversym); | |
6084 | error_ret: | |
6cdc0ccc | 6085 | free (isymbuf); |
b34976b6 | 6086 | return FALSE; |
f5d44ba0 AM |
6087 | } |
6088 | ||
6089 | ever = extversym + extsymoff; | |
6cdc0ccc AM |
6090 | isymend = isymbuf + extsymcount; |
6091 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
f5d44ba0 AM |
6092 | { |
6093 | const char *name; | |
f5d44ba0 AM |
6094 | Elf_Internal_Versym iver; |
6095 | ||
6cdc0ccc AM |
6096 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL |
6097 | || isym->st_shndx == SHN_UNDEF) | |
f5d44ba0 AM |
6098 | continue; |
6099 | ||
6100 | name = bfd_elf_string_from_elf_section (input, | |
6101 | hdr->sh_link, | |
6cdc0ccc | 6102 | isym->st_name); |
f5d44ba0 AM |
6103 | if (strcmp (name, h->root.root.string) != 0) |
6104 | continue; | |
6105 | ||
6106 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
6107 | ||
6108 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0) | |
6109 | { | |
6110 | /* If we have a non-hidden versioned sym, then it should | |
6111 | have provided a definition for the undefined sym. */ | |
6112 | abort (); | |
6113 | } | |
6114 | ||
6115 | if ((iver.vs_vers & VERSYM_VERSION) == 2) | |
6116 | { | |
6117 | /* This is the oldest (default) sym. We can use it. */ | |
6118 | free (extversym); | |
6cdc0ccc | 6119 | free (isymbuf); |
b34976b6 | 6120 | return TRUE; |
f5d44ba0 AM |
6121 | } |
6122 | } | |
6123 | ||
6124 | free (extversym); | |
6cdc0ccc | 6125 | free (isymbuf); |
f5d44ba0 AM |
6126 | } |
6127 | ||
b34976b6 | 6128 | return FALSE; |
f5d44ba0 AM |
6129 | } |
6130 | ||
252b5132 RH |
6131 | /* Add an external symbol to the symbol table. This is called from |
6132 | the hash table traversal routine. When generating a shared object, | |
6133 | we go through the symbol table twice. The first time we output | |
6134 | anything that might have been forced to local scope in a version | |
6135 | script. The second time we output the symbols that are still | |
6136 | global symbols. */ | |
6137 | ||
b34976b6 | 6138 | static bfd_boolean |
252b5132 RH |
6139 | elf_link_output_extsym (h, data) |
6140 | struct elf_link_hash_entry *h; | |
6141 | PTR data; | |
6142 | { | |
6143 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; | |
6144 | struct elf_final_link_info *finfo = eoinfo->finfo; | |
b34976b6 | 6145 | bfd_boolean strip; |
252b5132 RH |
6146 | Elf_Internal_Sym sym; |
6147 | asection *input_sec; | |
6148 | ||
e92d460e AM |
6149 | if (h->root.type == bfd_link_hash_warning) |
6150 | { | |
6151 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6152 | if (h->root.type == bfd_link_hash_new) | |
b34976b6 | 6153 | return TRUE; |
e92d460e AM |
6154 | } |
6155 | ||
252b5132 RH |
6156 | /* Decide whether to output this symbol in this pass. */ |
6157 | if (eoinfo->localsyms) | |
6158 | { | |
6159 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 6160 | return TRUE; |
252b5132 RH |
6161 | } |
6162 | else | |
6163 | { | |
6164 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
b34976b6 | 6165 | return TRUE; |
252b5132 RH |
6166 | } |
6167 | ||
6168 | /* If we are not creating a shared library, and this symbol is | |
6169 | referenced by a shared library but is not defined anywhere, then | |
6170 | warn that it is undefined. If we do not do this, the runtime | |
6171 | linker will complain that the symbol is undefined when the | |
6172 | program is run. We don't have to worry about symbols that are | |
6173 | referenced by regular files, because we will already have issued | |
6174 | warnings for them. */ | |
6175 | if (! finfo->info->relocateable | |
ae9a127f | 6176 | && (! finfo->info->shared || ! finfo->info->allow_shlib_undefined) |
252b5132 RH |
6177 | && h->root.type == bfd_link_hash_undefined |
6178 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0 | |
f5d44ba0 AM |
6179 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0 |
6180 | && ! elf_link_check_versioned_symbol (finfo->info, h)) | |
252b5132 RH |
6181 | { |
6182 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6183 | (finfo->info, h->root.root.string, h->root.u.undef.abfd, | |
b34976b6 | 6184 | (asection *) NULL, (bfd_vma) 0, TRUE))) |
252b5132 | 6185 | { |
b34976b6 AM |
6186 | eoinfo->failed = TRUE; |
6187 | return FALSE; | |
252b5132 RH |
6188 | } |
6189 | } | |
6190 | ||
6191 | /* We don't want to output symbols that have never been mentioned by | |
6192 | a regular file, or that we have been told to strip. However, if | |
6193 | h->indx is set to -2, the symbol is used by a reloc and we must | |
6194 | output it. */ | |
6195 | if (h->indx == -2) | |
b34976b6 | 6196 | strip = FALSE; |
252b5132 RH |
6197 | else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
6198 | || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0) | |
6199 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 | |
6200 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0) | |
b34976b6 | 6201 | strip = TRUE; |
75828352 AM |
6202 | else if (finfo->info->strip == strip_all) |
6203 | strip = TRUE; | |
6204 | else if (finfo->info->strip == strip_some | |
6205 | && bfd_hash_lookup (finfo->info->keep_hash, | |
6206 | h->root.root.string, FALSE, FALSE) == NULL) | |
6207 | strip = TRUE; | |
6208 | else if (finfo->info->strip_discarded | |
6209 | && (h->root.type == bfd_link_hash_defined | |
6210 | || h->root.type == bfd_link_hash_defweak) | |
6211 | && elf_discarded_section (h->root.u.def.section)) | |
b34976b6 | 6212 | strip = TRUE; |
252b5132 | 6213 | else |
b34976b6 | 6214 | strip = FALSE; |
252b5132 RH |
6215 | |
6216 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
2bd171e0 ILT |
6217 | nothing else to do unless it is a forced local symbol. */ |
6218 | if (strip | |
6219 | && h->dynindx == -1 | |
6220 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
b34976b6 | 6221 | return TRUE; |
252b5132 RH |
6222 | |
6223 | sym.st_value = 0; | |
6224 | sym.st_size = h->size; | |
6225 | sym.st_other = h->other; | |
6226 | if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
6227 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
6228 | else if (h->root.type == bfd_link_hash_undefweak | |
6229 | || h->root.type == bfd_link_hash_defweak) | |
6230 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
6231 | else | |
6232 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
6233 | ||
6234 | switch (h->root.type) | |
6235 | { | |
6236 | default: | |
6237 | case bfd_link_hash_new: | |
e92d460e | 6238 | case bfd_link_hash_warning: |
252b5132 | 6239 | abort (); |
b34976b6 | 6240 | return FALSE; |
252b5132 RH |
6241 | |
6242 | case bfd_link_hash_undefined: | |
252b5132 RH |
6243 | case bfd_link_hash_undefweak: |
6244 | input_sec = bfd_und_section_ptr; | |
6245 | sym.st_shndx = SHN_UNDEF; | |
6246 | break; | |
6247 | ||
6248 | case bfd_link_hash_defined: | |
6249 | case bfd_link_hash_defweak: | |
6250 | { | |
6251 | input_sec = h->root.u.def.section; | |
6252 | if (input_sec->output_section != NULL) | |
6253 | { | |
6254 | sym.st_shndx = | |
6255 | _bfd_elf_section_from_bfd_section (finfo->output_bfd, | |
6256 | input_sec->output_section); | |
9ad5cbcf | 6257 | if (sym.st_shndx == SHN_BAD) |
252b5132 RH |
6258 | { |
6259 | (*_bfd_error_handler) | |
6260 | (_("%s: could not find output section %s for input section %s"), | |
6261 | bfd_get_filename (finfo->output_bfd), | |
6262 | input_sec->output_section->name, | |
6263 | input_sec->name); | |
b34976b6 AM |
6264 | eoinfo->failed = TRUE; |
6265 | return FALSE; | |
252b5132 RH |
6266 | } |
6267 | ||
6268 | /* ELF symbols in relocateable files are section relative, | |
6269 | but in nonrelocateable files they are virtual | |
6270 | addresses. */ | |
6271 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
6272 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6273 | { |
6274 | sym.st_value += input_sec->output_section->vma; | |
6275 | if (h->type == STT_TLS) | |
6276 | { | |
6277 | /* STT_TLS symbols are relative to PT_TLS segment | |
6278 | base. */ | |
6279 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6280 | sym.st_value -= finfo->first_tls_sec->vma; | |
6281 | } | |
6282 | } | |
252b5132 RH |
6283 | } |
6284 | else | |
6285 | { | |
6286 | BFD_ASSERT (input_sec->owner == NULL | |
6287 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
6288 | sym.st_shndx = SHN_UNDEF; | |
6289 | input_sec = bfd_und_section_ptr; | |
6290 | } | |
6291 | } | |
6292 | break; | |
6293 | ||
6294 | case bfd_link_hash_common: | |
6295 | input_sec = h->root.u.c.p->section; | |
6296 | sym.st_shndx = SHN_COMMON; | |
6297 | sym.st_value = 1 << h->root.u.c.p->alignment_power; | |
6298 | break; | |
6299 | ||
6300 | case bfd_link_hash_indirect: | |
6301 | /* These symbols are created by symbol versioning. They point | |
c44233aa AM |
6302 | to the decorated version of the name. For example, if the |
6303 | symbol foo@@GNU_1.2 is the default, which should be used when | |
6304 | foo is used with no version, then we add an indirect symbol | |
6305 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
6306 | since the indirected symbol is already in the hash table. */ | |
b34976b6 | 6307 | return TRUE; |
252b5132 RH |
6308 | } |
6309 | ||
6310 | /* Give the processor backend a chance to tweak the symbol value, | |
6311 | and also to finish up anything that needs to be done for this | |
c44233aa AM |
6312 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for |
6313 | forced local syms when non-shared is due to a historical quirk. */ | |
252b5132 RH |
6314 | if ((h->dynindx != -1 |
6315 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0) | |
c44233aa AM |
6316 | && (finfo->info->shared |
6317 | || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
252b5132 RH |
6318 | && elf_hash_table (finfo->info)->dynamic_sections_created) |
6319 | { | |
6320 | struct elf_backend_data *bed; | |
6321 | ||
6322 | bed = get_elf_backend_data (finfo->output_bfd); | |
6323 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
6324 | (finfo->output_bfd, finfo->info, h, &sym))) | |
6325 | { | |
b34976b6 AM |
6326 | eoinfo->failed = TRUE; |
6327 | return FALSE; | |
252b5132 RH |
6328 | } |
6329 | } | |
6330 | ||
6331 | /* If we are marking the symbol as undefined, and there are no | |
6332 | non-weak references to this symbol from a regular object, then | |
91d3970e ILT |
6333 | mark the symbol as weak undefined; if there are non-weak |
6334 | references, mark the symbol as strong. We can't do this earlier, | |
252b5132 RH |
6335 | because it might not be marked as undefined until the |
6336 | finish_dynamic_symbol routine gets through with it. */ | |
6337 | if (sym.st_shndx == SHN_UNDEF | |
252b5132 | 6338 | && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0 |
a7b97311 AM |
6339 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
6340 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
91d3970e ILT |
6341 | { |
6342 | int bindtype; | |
6343 | ||
6344 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0) | |
6345 | bindtype = STB_GLOBAL; | |
6346 | else | |
6347 | bindtype = STB_WEAK; | |
6348 | sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info)); | |
6349 | } | |
252b5132 | 6350 | |
7c25b72c | 6351 | /* If a symbol is not defined locally, we clear the visibility field. */ |
2cd533b7 L |
6352 | if (! finfo->info->relocateable |
6353 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
7c25b72c | 6354 | sym.st_other &= ~ ELF_ST_VISIBILITY (-1); |
32c092c3 | 6355 | |
252b5132 | 6356 | /* If this symbol should be put in the .dynsym section, then put it |
f5d44ba0 AM |
6357 | there now. We already know the symbol index. We also fill in |
6358 | the entry in the .hash section. */ | |
252b5132 RH |
6359 | if (h->dynindx != -1 |
6360 | && elf_hash_table (finfo->info)->dynamic_sections_created) | |
6361 | { | |
6362 | size_t bucketcount; | |
6363 | size_t bucket; | |
c7ac6ff8 | 6364 | size_t hash_entry_size; |
252b5132 RH |
6365 | bfd_byte *bucketpos; |
6366 | bfd_vma chain; | |
dc810e39 | 6367 | Elf_External_Sym *esym; |
252b5132 RH |
6368 | |
6369 | sym.st_name = h->dynstr_index; | |
dc810e39 | 6370 | esym = (Elf_External_Sym *) finfo->dynsym_sec->contents + h->dynindx; |
9ad5cbcf | 6371 | elf_swap_symbol_out (finfo->output_bfd, &sym, (PTR) esym, (PTR) 0); |
252b5132 RH |
6372 | |
6373 | bucketcount = elf_hash_table (finfo->info)->bucketcount; | |
6374 | bucket = h->elf_hash_value % bucketcount; | |
3e932841 | 6375 | hash_entry_size |
c7ac6ff8 | 6376 | = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize; |
252b5132 | 6377 | bucketpos = ((bfd_byte *) finfo->hash_sec->contents |
c7ac6ff8 MM |
6378 | + (bucket + 2) * hash_entry_size); |
6379 | chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos); | |
dc810e39 AM |
6380 | bfd_put (8 * hash_entry_size, finfo->output_bfd, (bfd_vma) h->dynindx, |
6381 | bucketpos); | |
c7ac6ff8 MM |
6382 | bfd_put (8 * hash_entry_size, finfo->output_bfd, chain, |
6383 | ((bfd_byte *) finfo->hash_sec->contents | |
6384 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); | |
252b5132 RH |
6385 | |
6386 | if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL) | |
6387 | { | |
6388 | Elf_Internal_Versym iversym; | |
dc810e39 | 6389 | Elf_External_Versym *eversym; |
252b5132 RH |
6390 | |
6391 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
6392 | { | |
6393 | if (h->verinfo.verdef == NULL) | |
6394 | iversym.vs_vers = 0; | |
6395 | else | |
6396 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
6397 | } | |
6398 | else | |
6399 | { | |
6400 | if (h->verinfo.vertree == NULL) | |
6401 | iversym.vs_vers = 1; | |
6402 | else | |
6403 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
6404 | } | |
6405 | ||
6406 | if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0) | |
6407 | iversym.vs_vers |= VERSYM_HIDDEN; | |
6408 | ||
dc810e39 AM |
6409 | eversym = (Elf_External_Versym *) finfo->symver_sec->contents; |
6410 | eversym += h->dynindx; | |
6411 | _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym); | |
252b5132 RH |
6412 | } |
6413 | } | |
6414 | ||
6415 | /* If we're stripping it, then it was just a dynamic symbol, and | |
6416 | there's nothing else to do. */ | |
7330fb86 | 6417 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) |
b34976b6 | 6418 | return TRUE; |
252b5132 RH |
6419 | |
6420 | h->indx = bfd_get_symcount (finfo->output_bfd); | |
6421 | ||
6422 | if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec)) | |
6423 | { | |
b34976b6 AM |
6424 | eoinfo->failed = TRUE; |
6425 | return FALSE; | |
252b5132 RH |
6426 | } |
6427 | ||
b34976b6 | 6428 | return TRUE; |
252b5132 RH |
6429 | } |
6430 | ||
23bc299b MM |
6431 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which |
6432 | originated from the section given by INPUT_REL_HDR) to the | |
6433 | OUTPUT_BFD. */ | |
6434 | ||
b34976b6 | 6435 | static bfd_boolean |
3e932841 | 6436 | elf_link_output_relocs (output_bfd, input_section, input_rel_hdr, |
23bc299b MM |
6437 | internal_relocs) |
6438 | bfd *output_bfd; | |
6439 | asection *input_section; | |
6440 | Elf_Internal_Shdr *input_rel_hdr; | |
6441 | Elf_Internal_Rela *internal_relocs; | |
6442 | { | |
6443 | Elf_Internal_Rela *irela; | |
6444 | Elf_Internal_Rela *irelaend; | |
947216bf | 6445 | bfd_byte *erel; |
23bc299b MM |
6446 | Elf_Internal_Shdr *output_rel_hdr; |
6447 | asection *output_section; | |
7442e600 | 6448 | unsigned int *rel_countp = NULL; |
32f0787a | 6449 | struct elf_backend_data *bed; |
947216bf | 6450 | void (*swap_out) PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *)); |
23bc299b MM |
6451 | |
6452 | output_section = input_section->output_section; | |
6453 | output_rel_hdr = NULL; | |
6454 | ||
3e932841 | 6455 | if (elf_section_data (output_section)->rel_hdr.sh_entsize |
23bc299b MM |
6456 | == input_rel_hdr->sh_entsize) |
6457 | { | |
6458 | output_rel_hdr = &elf_section_data (output_section)->rel_hdr; | |
6459 | rel_countp = &elf_section_data (output_section)->rel_count; | |
6460 | } | |
6461 | else if (elf_section_data (output_section)->rel_hdr2 | |
6462 | && (elf_section_data (output_section)->rel_hdr2->sh_entsize | |
6463 | == input_rel_hdr->sh_entsize)) | |
6464 | { | |
6465 | output_rel_hdr = elf_section_data (output_section)->rel_hdr2; | |
6466 | rel_countp = &elf_section_data (output_section)->rel_count2; | |
6467 | } | |
41241523 TS |
6468 | else |
6469 | { | |
58821868 AM |
6470 | (*_bfd_error_handler) |
6471 | (_("%s: relocation size mismatch in %s section %s"), | |
6472 | bfd_get_filename (output_bfd), | |
6473 | bfd_archive_filename (input_section->owner), | |
6474 | input_section->name); | |
41241523 | 6475 | bfd_set_error (bfd_error_wrong_object_format); |
b34976b6 | 6476 | return FALSE; |
41241523 | 6477 | } |
32f0787a UC |
6478 | |
6479 | bed = get_elf_backend_data (output_bfd); | |
947216bf AM |
6480 | if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel)) |
6481 | swap_out = bed->s->swap_reloc_out; | |
6482 | else if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rela)) | |
6483 | swap_out = bed->s->swap_reloca_out; | |
6484 | else | |
6485 | abort (); | |
6486 | ||
6487 | erel = output_rel_hdr->contents; | |
6488 | erel += *rel_countp * input_rel_hdr->sh_entsize; | |
23bc299b | 6489 | irela = internal_relocs; |
58821868 AM |
6490 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) |
6491 | * bed->s->int_rels_per_ext_rel); | |
947216bf | 6492 | while (irela < irelaend) |
23bc299b | 6493 | { |
947216bf AM |
6494 | (*swap_out) (output_bfd, irela, erel); |
6495 | irela += bed->s->int_rels_per_ext_rel; | |
6496 | erel += input_rel_hdr->sh_entsize; | |
23bc299b MM |
6497 | } |
6498 | ||
6499 | /* Bump the counter, so that we know where to add the next set of | |
6500 | relocations. */ | |
d9bc7a44 | 6501 | *rel_countp += NUM_SHDR_ENTRIES (input_rel_hdr); |
41241523 | 6502 | |
b34976b6 | 6503 | return TRUE; |
23bc299b MM |
6504 | } |
6505 | ||
252b5132 RH |
6506 | /* Link an input file into the linker output file. This function |
6507 | handles all the sections and relocations of the input file at once. | |
6508 | This is so that we only have to read the local symbols once, and | |
6509 | don't have to keep them in memory. */ | |
6510 | ||
b34976b6 | 6511 | static bfd_boolean |
252b5132 RH |
6512 | elf_link_input_bfd (finfo, input_bfd) |
6513 | struct elf_final_link_info *finfo; | |
6514 | bfd *input_bfd; | |
6515 | { | |
b34976b6 AM |
6516 | bfd_boolean (*relocate_section) |
6517 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, | |
6518 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
252b5132 RH |
6519 | bfd *output_bfd; |
6520 | Elf_Internal_Shdr *symtab_hdr; | |
6521 | size_t locsymcount; | |
6522 | size_t extsymoff; | |
6cdc0ccc | 6523 | Elf_Internal_Sym *isymbuf; |
252b5132 | 6524 | Elf_Internal_Sym *isym; |
6cdc0ccc | 6525 | Elf_Internal_Sym *isymend; |
252b5132 RH |
6526 | long *pindex; |
6527 | asection **ppsection; | |
6528 | asection *o; | |
c7ac6ff8 | 6529 | struct elf_backend_data *bed; |
b34976b6 | 6530 | bfd_boolean emit_relocs; |
f8deed93 | 6531 | struct elf_link_hash_entry **sym_hashes; |
252b5132 RH |
6532 | |
6533 | output_bfd = finfo->output_bfd; | |
c7ac6ff8 MM |
6534 | bed = get_elf_backend_data (output_bfd); |
6535 | relocate_section = bed->elf_backend_relocate_section; | |
252b5132 RH |
6536 | |
6537 | /* If this is a dynamic object, we don't want to do anything here: | |
6538 | we don't want the local symbols, and we don't want the section | |
6539 | contents. */ | |
6540 | if ((input_bfd->flags & DYNAMIC) != 0) | |
b34976b6 | 6541 | return TRUE; |
252b5132 | 6542 | |
9317eacc | 6543 | emit_relocs = (finfo->info->relocateable |
c44233aa AM |
6544 | || finfo->info->emitrelocations |
6545 | || bed->elf_backend_emit_relocs); | |
9317eacc | 6546 | |
252b5132 RH |
6547 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
6548 | if (elf_bad_symtab (input_bfd)) | |
6549 | { | |
6550 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
6551 | extsymoff = 0; | |
6552 | } | |
6553 | else | |
6554 | { | |
6555 | locsymcount = symtab_hdr->sh_info; | |
6556 | extsymoff = symtab_hdr->sh_info; | |
6557 | } | |
6558 | ||
6559 | /* Read the local symbols. */ | |
6cdc0ccc AM |
6560 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
6561 | if (isymbuf == NULL && locsymcount != 0) | |
6562 | { | |
6563 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
6564 | finfo->internal_syms, | |
6565 | finfo->external_syms, | |
6566 | finfo->locsym_shndx); | |
6567 | if (isymbuf == NULL) | |
b34976b6 | 6568 | return FALSE; |
252b5132 RH |
6569 | } |
6570 | ||
6cdc0ccc AM |
6571 | /* Find local symbol sections and adjust values of symbols in |
6572 | SEC_MERGE sections. Write out those local symbols we know are | |
6573 | going into the output file. */ | |
6574 | isymend = isymbuf + locsymcount; | |
6575 | for (isym = isymbuf, pindex = finfo->indices, ppsection = finfo->sections; | |
6576 | isym < isymend; | |
6577 | isym++, pindex++, ppsection++) | |
252b5132 RH |
6578 | { |
6579 | asection *isec; | |
6580 | const char *name; | |
6581 | Elf_Internal_Sym osym; | |
6582 | ||
252b5132 RH |
6583 | *pindex = -1; |
6584 | ||
6585 | if (elf_bad_symtab (input_bfd)) | |
6586 | { | |
6587 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
6588 | { | |
6589 | *ppsection = NULL; | |
6590 | continue; | |
6591 | } | |
6592 | } | |
6593 | ||
6594 | if (isym->st_shndx == SHN_UNDEF) | |
862517b6 | 6595 | isec = bfd_und_section_ptr; |
9ad5cbcf AM |
6596 | else if (isym->st_shndx < SHN_LORESERVE |
6597 | || isym->st_shndx > SHN_HIRESERVE) | |
f5fa8ca2 JJ |
6598 | { |
6599 | isec = section_from_elf_index (input_bfd, isym->st_shndx); | |
65765700 | 6600 | if (isec |
68bfbfcc | 6601 | && isec->sec_info_type == ELF_INFO_TYPE_MERGE |
f5fa8ca2 JJ |
6602 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
6603 | isym->st_value = | |
6604 | _bfd_merged_section_offset (output_bfd, &isec, | |
65765700 | 6605 | elf_section_data (isec)->sec_info, |
f5fa8ca2 JJ |
6606 | isym->st_value, (bfd_vma) 0); |
6607 | } | |
252b5132 | 6608 | else if (isym->st_shndx == SHN_ABS) |
862517b6 | 6609 | isec = bfd_abs_section_ptr; |
252b5132 | 6610 | else if (isym->st_shndx == SHN_COMMON) |
862517b6 | 6611 | isec = bfd_com_section_ptr; |
252b5132 RH |
6612 | else |
6613 | { | |
6614 | /* Who knows? */ | |
6615 | isec = NULL; | |
6616 | } | |
6617 | ||
6618 | *ppsection = isec; | |
6619 | ||
6620 | /* Don't output the first, undefined, symbol. */ | |
6cdc0ccc | 6621 | if (ppsection == finfo->sections) |
252b5132 RH |
6622 | continue; |
6623 | ||
24376d1b AM |
6624 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) |
6625 | { | |
24376d1b AM |
6626 | /* We never output section symbols. Instead, we use the |
6627 | section symbol of the corresponding section in the output | |
6628 | file. */ | |
6629 | continue; | |
6630 | } | |
6631 | ||
252b5132 RH |
6632 | /* If we are stripping all symbols, we don't want to output this |
6633 | one. */ | |
6634 | if (finfo->info->strip == strip_all) | |
6635 | continue; | |
6636 | ||
252b5132 RH |
6637 | /* If we are discarding all local symbols, we don't want to |
6638 | output this one. If we are generating a relocateable output | |
6639 | file, then some of the local symbols may be required by | |
6640 | relocs; we output them below as we discover that they are | |
6641 | needed. */ | |
6642 | if (finfo->info->discard == discard_all) | |
6643 | continue; | |
6644 | ||
6645 | /* If this symbol is defined in a section which we are | |
c44233aa AM |
6646 | discarding, we don't need to keep it, but note that |
6647 | linker_mark is only reliable for sections that have contents. | |
6648 | For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE | |
6649 | as well as linker_mark. */ | |
9ad5cbcf | 6650 | if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) |
252b5132 RH |
6651 | && isec != NULL |
6652 | && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0) | |
6653 | || (! finfo->info->relocateable | |
6654 | && (isec->flags & SEC_EXCLUDE) != 0))) | |
6655 | continue; | |
6656 | ||
6657 | /* Get the name of the symbol. */ | |
6658 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
6659 | isym->st_name); | |
6660 | if (name == NULL) | |
b34976b6 | 6661 | return FALSE; |
252b5132 RH |
6662 | |
6663 | /* See if we are discarding symbols with this name. */ | |
6664 | if ((finfo->info->strip == strip_some | |
b34976b6 | 6665 | && (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE, FALSE) |
252b5132 | 6666 | == NULL)) |
f5fa8ca2 JJ |
6667 | || (((finfo->info->discard == discard_sec_merge |
6668 | && (isec->flags & SEC_MERGE) && ! finfo->info->relocateable) | |
6669 | || finfo->info->discard == discard_l) | |
252b5132 RH |
6670 | && bfd_is_local_label_name (input_bfd, name))) |
6671 | continue; | |
6672 | ||
6673 | /* If we get here, we are going to output this symbol. */ | |
6674 | ||
6675 | osym = *isym; | |
6676 | ||
6677 | /* Adjust the section index for the output file. */ | |
6678 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
6679 | isec->output_section); | |
9ad5cbcf | 6680 | if (osym.st_shndx == SHN_BAD) |
b34976b6 | 6681 | return FALSE; |
252b5132 RH |
6682 | |
6683 | *pindex = bfd_get_symcount (output_bfd); | |
6684 | ||
6685 | /* ELF symbols in relocateable files are section relative, but | |
6686 | in executable files they are virtual addresses. Note that | |
6687 | this code assumes that all ELF sections have an associated | |
6688 | BFD section with a reasonable value for output_offset; below | |
6689 | we assume that they also have a reasonable value for | |
6690 | output_section. Any special sections must be set up to meet | |
6691 | these requirements. */ | |
6692 | osym.st_value += isec->output_offset; | |
6693 | if (! finfo->info->relocateable) | |
13ae64f3 JJ |
6694 | { |
6695 | osym.st_value += isec->output_section->vma; | |
6696 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
6697 | { | |
6698 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
6699 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
6700 | osym.st_value -= finfo->first_tls_sec->vma; | |
6701 | } | |
6702 | } | |
252b5132 RH |
6703 | |
6704 | if (! elf_link_output_sym (finfo, name, &osym, isec)) | |
b34976b6 | 6705 | return FALSE; |
252b5132 RH |
6706 | } |
6707 | ||
6708 | /* Relocate the contents of each section. */ | |
f8deed93 | 6709 | sym_hashes = elf_sym_hashes (input_bfd); |
252b5132 RH |
6710 | for (o = input_bfd->sections; o != NULL; o = o->next) |
6711 | { | |
6712 | bfd_byte *contents; | |
6713 | ||
6714 | if (! o->linker_mark) | |
6715 | { | |
6716 | /* This section was omitted from the link. */ | |
6717 | continue; | |
6718 | } | |
6719 | ||
6720 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
6721 | || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0)) | |
6722 | continue; | |
6723 | ||
6724 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
6725 | { | |
6726 | /* Section was created by elf_link_create_dynamic_sections | |
6727 | or somesuch. */ | |
6728 | continue; | |
6729 | } | |
6730 | ||
6731 | /* Get the contents of the section. They have been cached by a | |
c44233aa AM |
6732 | relaxation routine. Note that o is a section in an input |
6733 | file, so the contents field will not have been set by any of | |
6734 | the routines which work on output files. */ | |
252b5132 RH |
6735 | if (elf_section_data (o)->this_hdr.contents != NULL) |
6736 | contents = elf_section_data (o)->this_hdr.contents; | |
6737 | else | |
6738 | { | |
6739 | contents = finfo->contents; | |
6740 | if (! bfd_get_section_contents (input_bfd, o, contents, | |
6741 | (file_ptr) 0, o->_raw_size)) | |
b34976b6 | 6742 | return FALSE; |
252b5132 RH |
6743 | } |
6744 | ||
6745 | if ((o->flags & SEC_RELOC) != 0) | |
6746 | { | |
6747 | Elf_Internal_Rela *internal_relocs; | |
6748 | ||
6749 | /* Get the swapped relocs. */ | |
6750 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
6751 | (input_bfd, o, finfo->external_relocs, | |
b34976b6 | 6752 | finfo->internal_relocs, FALSE)); |
252b5132 RH |
6753 | if (internal_relocs == NULL |
6754 | && o->reloc_count > 0) | |
b34976b6 | 6755 | return FALSE; |
252b5132 | 6756 | |
ec338859 AM |
6757 | /* Run through the relocs looking for any against symbols |
6758 | from discarded sections and section symbols from | |
6759 | removed link-once sections. Complain about relocs | |
6760 | against discarded sections. Zero relocs against removed | |
126495ed | 6761 | link-once sections. */ |
73d074b4 DJ |
6762 | if (!finfo->info->relocateable |
6763 | && !elf_section_ignore_discarded_relocs (o)) | |
ec338859 AM |
6764 | { |
6765 | Elf_Internal_Rela *rel, *relend; | |
50b4d486 | 6766 | |
ec338859 AM |
6767 | rel = internal_relocs; |
6768 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
6769 | for ( ; rel < relend; rel++) | |
6770 | { | |
6771 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); | |
6772 | ||
6773 | if (r_symndx >= locsymcount | |
6774 | || (elf_bad_symtab (input_bfd) | |
6775 | && finfo->sections[r_symndx] == NULL)) | |
6776 | { | |
6777 | struct elf_link_hash_entry *h; | |
6778 | ||
6779 | h = sym_hashes[r_symndx - extsymoff]; | |
6780 | while (h->root.type == bfd_link_hash_indirect | |
6781 | || h->root.type == bfd_link_hash_warning) | |
6782 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
6783 | ||
6784 | /* Complain if the definition comes from a | |
6785 | discarded section. */ | |
6786 | if ((h->root.type == bfd_link_hash_defined | |
6787 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 6788 | && elf_discarded_section (h->root.u.def.section)) |
ec338859 | 6789 | { |
ec338859 AM |
6790 | if ((o->flags & SEC_DEBUGGING) != 0) |
6791 | { | |
45e9217a | 6792 | BFD_ASSERT (r_symndx != 0); |
f8deed93 | 6793 | memset (rel, 0, sizeof (*rel)); |
ec338859 AM |
6794 | } |
6795 | else | |
ec338859 AM |
6796 | { |
6797 | if (! ((*finfo->info->callbacks->undefined_symbol) | |
6798 | (finfo->info, h->root.root.string, | |
6799 | input_bfd, o, rel->r_offset, | |
b34976b6 AM |
6800 | TRUE))) |
6801 | return FALSE; | |
ec338859 AM |
6802 | } |
6803 | } | |
6804 | } | |
6805 | else | |
6806 | { | |
f9f32305 | 6807 | asection *sec = finfo->sections[r_symndx]; |
50b4d486 | 6808 | |
ed4de5e2 | 6809 | if (sec != NULL && elf_discarded_section (sec)) |
f9f32305 | 6810 | { |
ad43ed4c L |
6811 | if ((o->flags & SEC_DEBUGGING) != 0 |
6812 | || (sec->flags & SEC_LINK_ONCE) != 0) | |
f9f32305 | 6813 | { |
45e9217a | 6814 | BFD_ASSERT (r_symndx != 0); |
f9f32305 AM |
6815 | rel->r_info |
6816 | = ELF_R_INFO (0, ELF_R_TYPE (rel->r_info)); | |
6817 | rel->r_addend = 0; | |
6818 | } | |
6819 | else | |
f9f32305 | 6820 | { |
b34976b6 | 6821 | bfd_boolean ok; |
f9f32305 AM |
6822 | const char *msg |
6823 | = _("local symbols in discarded section %s"); | |
6824 | bfd_size_type amt | |
6825 | = strlen (sec->name) + strlen (msg) - 1; | |
6826 | char *buf = (char *) bfd_malloc (amt); | |
6827 | ||
6828 | if (buf != NULL) | |
6829 | sprintf (buf, msg, sec->name); | |
6830 | else | |
6831 | buf = (char *) sec->name; | |
6832 | ok = (*finfo->info->callbacks | |
6833 | ->undefined_symbol) (finfo->info, buf, | |
6834 | input_bfd, o, | |
6835 | rel->r_offset, | |
b34976b6 | 6836 | TRUE); |
f9f32305 AM |
6837 | if (buf != sec->name) |
6838 | free (buf); | |
6839 | if (!ok) | |
b34976b6 | 6840 | return FALSE; |
ec338859 AM |
6841 | } |
6842 | } | |
6843 | } | |
6844 | } | |
6845 | } | |
50b4d486 | 6846 | |
252b5132 RH |
6847 | /* Relocate the section by invoking a back end routine. |
6848 | ||
6849 | The back end routine is responsible for adjusting the | |
6850 | section contents as necessary, and (if using Rela relocs | |
6851 | and generating a relocateable output file) adjusting the | |
6852 | reloc addend as necessary. | |
6853 | ||
6854 | The back end routine does not have to worry about setting | |
6855 | the reloc address or the reloc symbol index. | |
6856 | ||
6857 | The back end routine is given a pointer to the swapped in | |
6858 | internal symbols, and can access the hash table entries | |
6859 | for the external symbols via elf_sym_hashes (input_bfd). | |
6860 | ||
6861 | When generating relocateable output, the back end routine | |
6862 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
6863 | output symbol is going to be a section symbol | |
6864 | corresponding to the output section, which will require | |
6865 | the addend to be adjusted. */ | |
6866 | ||
6867 | if (! (*relocate_section) (output_bfd, finfo->info, | |
6868 | input_bfd, o, contents, | |
6869 | internal_relocs, | |
6cdc0ccc | 6870 | isymbuf, |
252b5132 | 6871 | finfo->sections)) |
b34976b6 | 6872 | return FALSE; |
252b5132 | 6873 | |
9317eacc | 6874 | if (emit_relocs) |
252b5132 RH |
6875 | { |
6876 | Elf_Internal_Rela *irela; | |
6877 | Elf_Internal_Rela *irelaend; | |
73722af0 | 6878 | bfd_vma last_offset; |
252b5132 | 6879 | struct elf_link_hash_entry **rel_hash; |
c89583f8 | 6880 | Elf_Internal_Shdr *input_rel_hdr, *input_rel_hdr2; |
4e8a9624 | 6881 | unsigned int next_erel; |
b34976b6 AM |
6882 | bfd_boolean (*reloc_emitter) |
6883 | PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, | |
6884 | Elf_Internal_Rela *)); | |
6885 | bfd_boolean rela_normal; | |
b491616a AM |
6886 | |
6887 | input_rel_hdr = &elf_section_data (o)->rel_hdr; | |
6888 | rela_normal = (bed->rela_normal | |
6889 | && (input_rel_hdr->sh_entsize | |
6890 | == sizeof (Elf_External_Rela))); | |
252b5132 RH |
6891 | |
6892 | /* Adjust the reloc addresses and symbol indices. */ | |
6893 | ||
6894 | irela = internal_relocs; | |
dc810e39 | 6895 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 | 6896 | rel_hash = (elf_section_data (o->output_section)->rel_hashes |
31367b81 MM |
6897 | + elf_section_data (o->output_section)->rel_count |
6898 | + elf_section_data (o->output_section)->rel_count2); | |
73722af0 AM |
6899 | last_offset = o->output_offset; |
6900 | if (!finfo->info->relocateable) | |
6901 | last_offset += o->output_section->vma; | |
209f668e | 6902 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) |
252b5132 RH |
6903 | { |
6904 | unsigned long r_symndx; | |
252b5132 | 6905 | asection *sec; |
fad2542d | 6906 | Elf_Internal_Sym sym; |
252b5132 | 6907 | |
209f668e NC |
6908 | if (next_erel == bed->s->int_rels_per_ext_rel) |
6909 | { | |
6910 | rel_hash++; | |
6911 | next_erel = 0; | |
6912 | } | |
6913 | ||
d6fe2dc1 AM |
6914 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
6915 | finfo->info, o, | |
6916 | irela->r_offset); | |
6917 | if (irela->r_offset >= (bfd_vma) -2) | |
6918 | { | |
73722af0 AM |
6919 | /* This is a reloc for a deleted entry or somesuch. |
6920 | Turn it into an R_*_NONE reloc, at the same | |
6921 | offset as the last reloc. elf_eh_frame.c and | |
6922 | elf_bfd_discard_info rely on reloc offsets | |
b34976b6 | 6923 | being ordered. */ |
73722af0 AM |
6924 | irela->r_offset = last_offset; |
6925 | irela->r_info = 0; | |
6926 | irela->r_addend = 0; | |
d6fe2dc1 AM |
6927 | continue; |
6928 | } | |
6929 | ||
252b5132 RH |
6930 | irela->r_offset += o->output_offset; |
6931 | ||
7ad34365 | 6932 | /* Relocs in an executable have to be virtual addresses. */ |
fd984e46 | 6933 | if (!finfo->info->relocateable) |
7ad34365 NC |
6934 | irela->r_offset += o->output_section->vma; |
6935 | ||
73722af0 | 6936 | last_offset = irela->r_offset; |
252b5132 | 6937 | |
73722af0 AM |
6938 | r_symndx = ELF_R_SYM (irela->r_info); |
6939 | if (r_symndx == STN_UNDEF) | |
252b5132 RH |
6940 | continue; |
6941 | ||
6942 | if (r_symndx >= locsymcount | |
6943 | || (elf_bad_symtab (input_bfd) | |
6944 | && finfo->sections[r_symndx] == NULL)) | |
6945 | { | |
6946 | struct elf_link_hash_entry *rh; | |
209f668e | 6947 | unsigned long indx; |
252b5132 RH |
6948 | |
6949 | /* This is a reloc against a global symbol. We | |
6950 | have not yet output all the local symbols, so | |
6951 | we do not know the symbol index of any global | |
6952 | symbol. We set the rel_hash entry for this | |
6953 | reloc to point to the global hash table entry | |
6954 | for this symbol. The symbol index is then | |
6955 | set at the end of elf_bfd_final_link. */ | |
6956 | indx = r_symndx - extsymoff; | |
6957 | rh = elf_sym_hashes (input_bfd)[indx]; | |
6958 | while (rh->root.type == bfd_link_hash_indirect | |
6959 | || rh->root.type == bfd_link_hash_warning) | |
6960 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
6961 | ||
6962 | /* Setting the index to -2 tells | |
6963 | elf_link_output_extsym that this symbol is | |
6964 | used by a reloc. */ | |
6965 | BFD_ASSERT (rh->indx < 0); | |
6966 | rh->indx = -2; | |
6967 | ||
6968 | *rel_hash = rh; | |
6969 | ||
6970 | continue; | |
6971 | } | |
6972 | ||
3e932841 | 6973 | /* This is a reloc against a local symbol. */ |
252b5132 RH |
6974 | |
6975 | *rel_hash = NULL; | |
fad2542d | 6976 | sym = isymbuf[r_symndx]; |
252b5132 | 6977 | sec = finfo->sections[r_symndx]; |
fad2542d | 6978 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
252b5132 RH |
6979 | { |
6980 | /* I suppose the backend ought to fill in the | |
6981 | section of any STT_SECTION symbol against a | |
6982 | processor specific section. If we have | |
6983 | discarded a section, the output_section will | |
6984 | be the absolute section. */ | |
b491616a AM |
6985 | if (bfd_is_abs_section (sec) |
6986 | || (sec != NULL | |
6987 | && bfd_is_abs_section (sec->output_section))) | |
252b5132 RH |
6988 | r_symndx = 0; |
6989 | else if (sec == NULL || sec->owner == NULL) | |
6990 | { | |
6991 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 6992 | return FALSE; |
252b5132 RH |
6993 | } |
6994 | else | |
6995 | { | |
6996 | r_symndx = sec->output_section->target_index; | |
6997 | BFD_ASSERT (r_symndx != 0); | |
6998 | } | |
b491616a AM |
6999 | |
7000 | /* Adjust the addend according to where the | |
f5d44ba0 | 7001 | section winds up in the output section. */ |
b491616a AM |
7002 | if (rela_normal) |
7003 | irela->r_addend += sec->output_offset; | |
252b5132 RH |
7004 | } |
7005 | else | |
7006 | { | |
7007 | if (finfo->indices[r_symndx] == -1) | |
7008 | { | |
dc810e39 | 7009 | unsigned long shlink; |
252b5132 RH |
7010 | const char *name; |
7011 | asection *osec; | |
7012 | ||
7013 | if (finfo->info->strip == strip_all) | |
7014 | { | |
7015 | /* You can't do ld -r -s. */ | |
7016 | bfd_set_error (bfd_error_invalid_operation); | |
b34976b6 | 7017 | return FALSE; |
252b5132 RH |
7018 | } |
7019 | ||
7020 | /* This symbol was skipped earlier, but | |
7021 | since it is needed by a reloc, we | |
7022 | must output it now. */ | |
dc810e39 | 7023 | shlink = symtab_hdr->sh_link; |
a7b97311 | 7024 | name = (bfd_elf_string_from_elf_section |
fad2542d | 7025 | (input_bfd, shlink, sym.st_name)); |
252b5132 | 7026 | if (name == NULL) |
b34976b6 | 7027 | return FALSE; |
252b5132 RH |
7028 | |
7029 | osec = sec->output_section; | |
fad2542d | 7030 | sym.st_shndx = |
252b5132 RH |
7031 | _bfd_elf_section_from_bfd_section (output_bfd, |
7032 | osec); | |
fad2542d | 7033 | if (sym.st_shndx == SHN_BAD) |
b34976b6 | 7034 | return FALSE; |
252b5132 | 7035 | |
fad2542d | 7036 | sym.st_value += sec->output_offset; |
252b5132 | 7037 | if (! finfo->info->relocateable) |
13ae64f3 | 7038 | { |
fad2542d AM |
7039 | sym.st_value += osec->vma; |
7040 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
13ae64f3 JJ |
7041 | { |
7042 | /* STT_TLS symbols are relative to PT_TLS | |
7043 | segment base. */ | |
7044 | BFD_ASSERT (finfo->first_tls_sec != NULL); | |
fad2542d | 7045 | sym.st_value -= finfo->first_tls_sec->vma; |
13ae64f3 JJ |
7046 | } |
7047 | } | |
252b5132 | 7048 | |
a7b97311 AM |
7049 | finfo->indices[r_symndx] |
7050 | = bfd_get_symcount (output_bfd); | |
252b5132 | 7051 | |
fad2542d | 7052 | if (! elf_link_output_sym (finfo, name, &sym, sec)) |
b34976b6 | 7053 | return FALSE; |
252b5132 RH |
7054 | } |
7055 | ||
7056 | r_symndx = finfo->indices[r_symndx]; | |
7057 | } | |
7058 | ||
7059 | irela->r_info = ELF_R_INFO (r_symndx, | |
7060 | ELF_R_TYPE (irela->r_info)); | |
7061 | } | |
7062 | ||
7063 | /* Swap out the relocs. */ | |
c44233aa AM |
7064 | if (bed->elf_backend_emit_relocs |
7065 | && !(finfo->info->relocateable | |
a7b97311 | 7066 | || finfo->info->emitrelocations)) |
c44233aa AM |
7067 | reloc_emitter = bed->elf_backend_emit_relocs; |
7068 | else | |
7069 | reloc_emitter = elf_link_output_relocs; | |
9317eacc | 7070 | |
c89583f8 AM |
7071 | if (input_rel_hdr->sh_size != 0 |
7072 | && ! (*reloc_emitter) (output_bfd, o, input_rel_hdr, | |
7073 | internal_relocs)) | |
b34976b6 | 7074 | return FALSE; |
9317eacc | 7075 | |
c89583f8 AM |
7076 | input_rel_hdr2 = elf_section_data (o)->rel_hdr2; |
7077 | if (input_rel_hdr2 && input_rel_hdr2->sh_size != 0) | |
c44233aa AM |
7078 | { |
7079 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) | |
dc810e39 | 7080 | * bed->s->int_rels_per_ext_rel); |
c89583f8 | 7081 | if (! (*reloc_emitter) (output_bfd, o, input_rel_hdr2, |
41241523 | 7082 | internal_relocs)) |
b34976b6 | 7083 | return FALSE; |
c44233aa | 7084 | } |
252b5132 RH |
7085 | } |
7086 | } | |
7087 | ||
7088 | /* Write out the modified section contents. */ | |
73d074b4 | 7089 | if (bed->elf_backend_write_section |
f9f32305 | 7090 | && (*bed->elf_backend_write_section) (output_bfd, o, contents)) |
73d074b4 DJ |
7091 | { |
7092 | /* Section written out. */ | |
7093 | } | |
68bfbfcc | 7094 | else switch (o->sec_info_type) |
f5fa8ca2 | 7095 | { |
65765700 | 7096 | case ELF_INFO_TYPE_STABS: |
f5fa8ca2 | 7097 | if (! (_bfd_write_section_stabs |
65765700 JJ |
7098 | (output_bfd, |
7099 | &elf_hash_table (finfo->info)->stab_info, | |
7100 | o, &elf_section_data (o)->sec_info, contents))) | |
b34976b6 | 7101 | return FALSE; |
65765700 JJ |
7102 | break; |
7103 | case ELF_INFO_TYPE_MERGE: | |
126495ed AM |
7104 | if (! _bfd_write_merged_section (output_bfd, o, |
7105 | elf_section_data (o)->sec_info)) | |
b34976b6 | 7106 | return FALSE; |
65765700 JJ |
7107 | break; |
7108 | case ELF_INFO_TYPE_EH_FRAME: | |
7109 | { | |
126495ed AM |
7110 | if (! _bfd_elf_write_section_eh_frame (output_bfd, finfo->info, |
7111 | o, contents)) | |
b34976b6 | 7112 | return FALSE; |
65765700 JJ |
7113 | } |
7114 | break; | |
7115 | default: | |
7116 | { | |
7117 | bfd_size_type sec_size; | |
7118 | ||
7119 | sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size); | |
7120 | if (! (o->flags & SEC_EXCLUDE) | |
7121 | && ! bfd_set_section_contents (output_bfd, o->output_section, | |
7122 | contents, | |
7123 | (file_ptr) o->output_offset, | |
7124 | sec_size)) | |
b34976b6 | 7125 | return FALSE; |
65765700 JJ |
7126 | } |
7127 | break; | |
252b5132 RH |
7128 | } |
7129 | } | |
7130 | ||
b34976b6 | 7131 | return TRUE; |
252b5132 RH |
7132 | } |
7133 | ||
7134 | /* Generate a reloc when linking an ELF file. This is a reloc | |
7135 | requested by the linker, and does come from any input file. This | |
7136 | is used to build constructor and destructor tables when linking | |
7137 | with -Ur. */ | |
7138 | ||
b34976b6 | 7139 | static bfd_boolean |
252b5132 RH |
7140 | elf_reloc_link_order (output_bfd, info, output_section, link_order) |
7141 | bfd *output_bfd; | |
7142 | struct bfd_link_info *info; | |
7143 | asection *output_section; | |
7144 | struct bfd_link_order *link_order; | |
7145 | { | |
7146 | reloc_howto_type *howto; | |
7147 | long indx; | |
7148 | bfd_vma offset; | |
7149 | bfd_vma addend; | |
7150 | struct elf_link_hash_entry **rel_hash_ptr; | |
7151 | Elf_Internal_Shdr *rel_hdr; | |
32f0787a | 7152 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
947216bf AM |
7153 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; |
7154 | bfd_byte *erel; | |
7155 | unsigned int i; | |
252b5132 RH |
7156 | |
7157 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
7158 | if (howto == NULL) | |
7159 | { | |
7160 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 7161 | return FALSE; |
252b5132 RH |
7162 | } |
7163 | ||
7164 | addend = link_order->u.reloc.p->addend; | |
7165 | ||
7166 | /* Figure out the symbol index. */ | |
7167 | rel_hash_ptr = (elf_section_data (output_section)->rel_hashes | |
31367b81 MM |
7168 | + elf_section_data (output_section)->rel_count |
7169 | + elf_section_data (output_section)->rel_count2); | |
252b5132 RH |
7170 | if (link_order->type == bfd_section_reloc_link_order) |
7171 | { | |
7172 | indx = link_order->u.reloc.p->u.section->target_index; | |
7173 | BFD_ASSERT (indx != 0); | |
7174 | *rel_hash_ptr = NULL; | |
7175 | } | |
7176 | else | |
7177 | { | |
7178 | struct elf_link_hash_entry *h; | |
7179 | ||
7180 | /* Treat a reloc against a defined symbol as though it were | |
c44233aa | 7181 | actually against the section. */ |
252b5132 RH |
7182 | h = ((struct elf_link_hash_entry *) |
7183 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
7184 | link_order->u.reloc.p->u.name, | |
b34976b6 | 7185 | FALSE, FALSE, TRUE)); |
252b5132 RH |
7186 | if (h != NULL |
7187 | && (h->root.type == bfd_link_hash_defined | |
7188 | || h->root.type == bfd_link_hash_defweak)) | |
7189 | { | |
7190 | asection *section; | |
7191 | ||
7192 | section = h->root.u.def.section; | |
7193 | indx = section->output_section->target_index; | |
7194 | *rel_hash_ptr = NULL; | |
7195 | /* It seems that we ought to add the symbol value to the | |
c44233aa AM |
7196 | addend here, but in practice it has already been added |
7197 | because it was passed to constructor_callback. */ | |
252b5132 RH |
7198 | addend += section->output_section->vma + section->output_offset; |
7199 | } | |
7200 | else if (h != NULL) | |
7201 | { | |
7202 | /* Setting the index to -2 tells elf_link_output_extsym that | |
7203 | this symbol is used by a reloc. */ | |
7204 | h->indx = -2; | |
7205 | *rel_hash_ptr = h; | |
7206 | indx = 0; | |
7207 | } | |
7208 | else | |
7209 | { | |
7210 | if (! ((*info->callbacks->unattached_reloc) | |
7211 | (info, link_order->u.reloc.p->u.name, (bfd *) NULL, | |
7212 | (asection *) NULL, (bfd_vma) 0))) | |
b34976b6 | 7213 | return FALSE; |
252b5132 RH |
7214 | indx = 0; |
7215 | } | |
7216 | } | |
7217 | ||
7218 | /* If this is an inplace reloc, we must write the addend into the | |
7219 | object file. */ | |
7220 | if (howto->partial_inplace && addend != 0) | |
7221 | { | |
7222 | bfd_size_type size; | |
7223 | bfd_reloc_status_type rstat; | |
7224 | bfd_byte *buf; | |
b34976b6 | 7225 | bfd_boolean ok; |
dc810e39 | 7226 | const char *sym_name; |
252b5132 RH |
7227 | |
7228 | size = bfd_get_reloc_size (howto); | |
7229 | buf = (bfd_byte *) bfd_zmalloc (size); | |
7230 | if (buf == (bfd_byte *) NULL) | |
b34976b6 | 7231 | return FALSE; |
dc810e39 | 7232 | rstat = _bfd_relocate_contents (howto, output_bfd, (bfd_vma) addend, buf); |
252b5132 RH |
7233 | switch (rstat) |
7234 | { | |
7235 | case bfd_reloc_ok: | |
7236 | break; | |
dc810e39 | 7237 | |
252b5132 RH |
7238 | default: |
7239 | case bfd_reloc_outofrange: | |
7240 | abort (); | |
dc810e39 | 7241 | |
252b5132 | 7242 | case bfd_reloc_overflow: |
dc810e39 AM |
7243 | if (link_order->type == bfd_section_reloc_link_order) |
7244 | sym_name = bfd_section_name (output_bfd, | |
7245 | link_order->u.reloc.p->u.section); | |
7246 | else | |
7247 | sym_name = link_order->u.reloc.p->u.name; | |
252b5132 | 7248 | if (! ((*info->callbacks->reloc_overflow) |
dc810e39 AM |
7249 | (info, sym_name, howto->name, addend, |
7250 | (bfd *) NULL, (asection *) NULL, (bfd_vma) 0))) | |
252b5132 RH |
7251 | { |
7252 | free (buf); | |
b34976b6 | 7253 | return FALSE; |
252b5132 RH |
7254 | } |
7255 | break; | |
7256 | } | |
7257 | ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf, | |
7258 | (file_ptr) link_order->offset, size); | |
7259 | free (buf); | |
7260 | if (! ok) | |
b34976b6 | 7261 | return FALSE; |
252b5132 RH |
7262 | } |
7263 | ||
7264 | /* The address of a reloc is relative to the section in a | |
7265 | relocateable file, and is a virtual address in an executable | |
7266 | file. */ | |
7267 | offset = link_order->offset; | |
7268 | if (! info->relocateable) | |
7269 | offset += output_section->vma; | |
7270 | ||
947216bf AM |
7271 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
7272 | { | |
7273 | irel[i].r_offset = offset; | |
7274 | irel[i].r_info = 0; | |
7275 | irel[i].r_addend = 0; | |
7276 | } | |
7277 | irel[0].r_info = ELF_R_INFO (indx, howto->type); | |
252b5132 | 7278 | |
947216bf AM |
7279 | rel_hdr = &elf_section_data (output_section)->rel_hdr; |
7280 | erel = rel_hdr->contents; | |
252b5132 RH |
7281 | if (rel_hdr->sh_type == SHT_REL) |
7282 | { | |
947216bf AM |
7283 | erel += (elf_section_data (output_section)->rel_count |
7284 | * sizeof (Elf_External_Rel)); | |
7285 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); | |
252b5132 RH |
7286 | } |
7287 | else | |
7288 | { | |
947216bf AM |
7289 | irel[0].r_addend = addend; |
7290 | erel += (elf_section_data (output_section)->rel_count | |
7291 | * sizeof (Elf_External_Rela)); | |
7292 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); | |
252b5132 RH |
7293 | } |
7294 | ||
0525d26e | 7295 | ++elf_section_data (output_section)->rel_count; |
252b5132 | 7296 | |
b34976b6 | 7297 | return TRUE; |
252b5132 | 7298 | } |
252b5132 RH |
7299 | \f |
7300 | /* Allocate a pointer to live in a linker created section. */ | |
7301 | ||
b34976b6 | 7302 | bfd_boolean |
252b5132 RH |
7303 | elf_create_pointer_linker_section (abfd, info, lsect, h, rel) |
7304 | bfd *abfd; | |
7305 | struct bfd_link_info *info; | |
7306 | elf_linker_section_t *lsect; | |
7307 | struct elf_link_hash_entry *h; | |
7308 | const Elf_Internal_Rela *rel; | |
7309 | { | |
7310 | elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL; | |
7311 | elf_linker_section_pointers_t *linker_section_ptr; | |
dc810e39 AM |
7312 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7313 | bfd_size_type amt; | |
252b5132 RH |
7314 | |
7315 | BFD_ASSERT (lsect != NULL); | |
7316 | ||
a7b97311 | 7317 | /* Is this a global symbol? */ |
252b5132 RH |
7318 | if (h != NULL) |
7319 | { | |
a7b97311 | 7320 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7321 | if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer, |
7322 | rel->r_addend, | |
7323 | lsect->which)) | |
b34976b6 | 7324 | return TRUE; |
252b5132 RH |
7325 | |
7326 | ptr_linker_section_ptr = &h->linker_section_pointer; | |
7327 | /* Make sure this symbol is output as a dynamic symbol. */ | |
7328 | if (h->dynindx == -1) | |
7329 | { | |
7330 | if (! elf_link_record_dynamic_symbol (info, h)) | |
b34976b6 | 7331 | return FALSE; |
252b5132 RH |
7332 | } |
7333 | ||
7334 | if (lsect->rel_section) | |
7335 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7336 | } | |
a7b97311 | 7337 | else |
252b5132 | 7338 | { |
a7b97311 | 7339 | /* Allocation of a pointer to a local symbol. */ |
252b5132 RH |
7340 | elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd); |
7341 | ||
a7b97311 | 7342 | /* Allocate a table to hold the local symbols if first time. */ |
252b5132 RH |
7343 | if (!ptr) |
7344 | { | |
7345 | unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info; | |
7346 | register unsigned int i; | |
7347 | ||
dc810e39 AM |
7348 | amt = num_symbols; |
7349 | amt *= sizeof (elf_linker_section_pointers_t *); | |
7350 | ptr = (elf_linker_section_pointers_t **) bfd_alloc (abfd, amt); | |
252b5132 RH |
7351 | |
7352 | if (!ptr) | |
b34976b6 | 7353 | return FALSE; |
252b5132 RH |
7354 | |
7355 | elf_local_ptr_offsets (abfd) = ptr; | |
7356 | for (i = 0; i < num_symbols; i++) | |
a7b97311 | 7357 | ptr[i] = (elf_linker_section_pointers_t *) 0; |
252b5132 RH |
7358 | } |
7359 | ||
a7b97311 | 7360 | /* Has this symbol already been allocated? If so, our work is done. */ |
252b5132 RH |
7361 | if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx], |
7362 | rel->r_addend, | |
7363 | lsect->which)) | |
b34976b6 | 7364 | return TRUE; |
252b5132 RH |
7365 | |
7366 | ptr_linker_section_ptr = &ptr[r_symndx]; | |
7367 | ||
7368 | if (info->shared) | |
7369 | { | |
7370 | /* If we are generating a shared object, we need to | |
7371 | output a R_<xxx>_RELATIVE reloc so that the | |
7372 | dynamic linker can adjust this GOT entry. */ | |
7373 | BFD_ASSERT (lsect->rel_section != NULL); | |
7374 | lsect->rel_section->_raw_size += sizeof (Elf_External_Rela); | |
7375 | } | |
7376 | } | |
7377 | ||
a7b97311 AM |
7378 | /* Allocate space for a pointer in the linker section, and allocate |
7379 | a new pointer record from internal memory. */ | |
252b5132 | 7380 | BFD_ASSERT (ptr_linker_section_ptr != NULL); |
dc810e39 AM |
7381 | amt = sizeof (elf_linker_section_pointers_t); |
7382 | linker_section_ptr = (elf_linker_section_pointers_t *) bfd_alloc (abfd, amt); | |
252b5132 RH |
7383 | |
7384 | if (!linker_section_ptr) | |
b34976b6 | 7385 | return FALSE; |
252b5132 RH |
7386 | |
7387 | linker_section_ptr->next = *ptr_linker_section_ptr; | |
7388 | linker_section_ptr->addend = rel->r_addend; | |
7389 | linker_section_ptr->which = lsect->which; | |
b34976b6 | 7390 | linker_section_ptr->written_address_p = FALSE; |
252b5132 RH |
7391 | *ptr_linker_section_ptr = linker_section_ptr; |
7392 | ||
7393 | #if 0 | |
7394 | if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset) | |
7395 | { | |
a7b97311 AM |
7396 | linker_section_ptr->offset = (lsect->section->_raw_size |
7397 | - lsect->hole_size + (ARCH_SIZE / 8)); | |
252b5132 RH |
7398 | lsect->hole_offset += ARCH_SIZE / 8; |
7399 | lsect->sym_offset += ARCH_SIZE / 8; | |
a7b97311 | 7400 | if (lsect->sym_hash) |
252b5132 | 7401 | { |
a7b97311 | 7402 | /* Bump up symbol value if needed. */ |
252b5132 RH |
7403 | lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8; |
7404 | #ifdef DEBUG | |
7405 | fprintf (stderr, "Bump up %s by %ld, current value = %ld\n", | |
7406 | lsect->sym_hash->root.root.string, | |
a7b97311 AM |
7407 | (long) ARCH_SIZE / 8, |
7408 | (long) lsect->sym_hash->root.u.def.value); | |
252b5132 RH |
7409 | #endif |
7410 | } | |
7411 | } | |
7412 | else | |
7413 | #endif | |
7414 | linker_section_ptr->offset = lsect->section->_raw_size; | |
7415 | ||
7416 | lsect->section->_raw_size += ARCH_SIZE / 8; | |
7417 | ||
7418 | #ifdef DEBUG | |
a7b97311 AM |
7419 | fprintf (stderr, |
7420 | "Create pointer in linker section %s, offset = %ld, section size = %ld\n", | |
7421 | lsect->name, (long) linker_section_ptr->offset, | |
7422 | (long) lsect->section->_raw_size); | |
252b5132 RH |
7423 | #endif |
7424 | ||
b34976b6 | 7425 | return TRUE; |
252b5132 | 7426 | } |
252b5132 RH |
7427 | \f |
7428 | #if ARCH_SIZE==64 | |
7429 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR) | |
7430 | #endif | |
7431 | #if ARCH_SIZE==32 | |
7432 | #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR) | |
7433 | #endif | |
7434 | ||
209f668e | 7435 | /* Fill in the address for a pointer generated in a linker section. */ |
252b5132 RH |
7436 | |
7437 | bfd_vma | |
a7b97311 AM |
7438 | elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h, |
7439 | relocation, rel, relative_reloc) | |
252b5132 RH |
7440 | bfd *output_bfd; |
7441 | bfd *input_bfd; | |
7442 | struct bfd_link_info *info; | |
7443 | elf_linker_section_t *lsect; | |
7444 | struct elf_link_hash_entry *h; | |
7445 | bfd_vma relocation; | |
7446 | const Elf_Internal_Rela *rel; | |
7447 | int relative_reloc; | |
7448 | { | |
7449 | elf_linker_section_pointers_t *linker_section_ptr; | |
7450 | ||
7451 | BFD_ASSERT (lsect != NULL); | |
7452 | ||
a7b97311 | 7453 | if (h != NULL) |
252b5132 | 7454 | { |
a7b97311 AM |
7455 | /* Handle global symbol. */ |
7456 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section | |
7457 | (h->linker_section_pointer, | |
7458 | rel->r_addend, | |
7459 | lsect->which)); | |
252b5132 RH |
7460 | |
7461 | BFD_ASSERT (linker_section_ptr != NULL); | |
7462 | ||
7463 | if (! elf_hash_table (info)->dynamic_sections_created | |
7464 | || (info->shared | |
7465 | && info->symbolic | |
7466 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))) | |
7467 | { | |
7468 | /* This is actually a static link, or it is a | |
7469 | -Bsymbolic link and the symbol is defined | |
7470 | locally. We must initialize this entry in the | |
7471 | global section. | |
7472 | ||
7473 | When doing a dynamic link, we create a .rela.<xxx> | |
7474 | relocation entry to initialize the value. This | |
7475 | is done in the finish_dynamic_symbol routine. */ | |
7476 | if (!linker_section_ptr->written_address_p) | |
7477 | { | |
b34976b6 | 7478 | linker_section_ptr->written_address_p = TRUE; |
a7b97311 AM |
7479 | bfd_put_ptr (output_bfd, |
7480 | relocation + linker_section_ptr->addend, | |
7481 | (lsect->section->contents | |
7482 | + linker_section_ptr->offset)); | |
252b5132 RH |
7483 | } |
7484 | } | |
7485 | } | |
a7b97311 | 7486 | else |
252b5132 | 7487 | { |
a7b97311 | 7488 | /* Handle local symbol. */ |
252b5132 RH |
7489 | unsigned long r_symndx = ELF_R_SYM (rel->r_info); |
7490 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL); | |
7491 | BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL); | |
a7b97311 AM |
7492 | linker_section_ptr = (_bfd_elf_find_pointer_linker_section |
7493 | (elf_local_ptr_offsets (input_bfd)[r_symndx], | |
7494 | rel->r_addend, | |
7495 | lsect->which)); | |
252b5132 RH |
7496 | |
7497 | BFD_ASSERT (linker_section_ptr != NULL); | |
7498 | ||
a7b97311 | 7499 | /* Write out pointer if it hasn't been rewritten out before. */ |
252b5132 RH |
7500 | if (!linker_section_ptr->written_address_p) |
7501 | { | |
b34976b6 | 7502 | linker_section_ptr->written_address_p = TRUE; |
252b5132 RH |
7503 | bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend, |
7504 | lsect->section->contents + linker_section_ptr->offset); | |
7505 | ||
7506 | if (info->shared) | |
7507 | { | |
7508 | asection *srel = lsect->rel_section; | |
947216bf AM |
7509 | Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL]; |
7510 | bfd_byte *erel; | |
209f668e NC |
7511 | struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
7512 | unsigned int i; | |
252b5132 | 7513 | |
a7b97311 AM |
7514 | /* We need to generate a relative reloc for the dynamic |
7515 | linker. */ | |
252b5132 | 7516 | if (!srel) |
a7b97311 AM |
7517 | { |
7518 | srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj, | |
7519 | lsect->rel_name); | |
7520 | lsect->rel_section = srel; | |
7521 | } | |
252b5132 RH |
7522 | |
7523 | BFD_ASSERT (srel != NULL); | |
7524 | ||
209f668e | 7525 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) |
947216bf AM |
7526 | { |
7527 | outrel[i].r_offset = (lsect->section->output_section->vma | |
7528 | + lsect->section->output_offset | |
7529 | + linker_section_ptr->offset); | |
7530 | outrel[i].r_info = 0; | |
7531 | outrel[i].r_addend = 0; | |
7532 | } | |
209f668e | 7533 | outrel[0].r_info = ELF_R_INFO (0, relative_reloc); |
947216bf AM |
7534 | erel = lsect->section->contents; |
7535 | erel += (elf_section_data (lsect->section)->rel_count++ | |
7536 | * sizeof (Elf_External_Rela)); | |
dc810e39 | 7537 | elf_swap_reloca_out (output_bfd, outrel, erel); |
252b5132 RH |
7538 | } |
7539 | } | |
7540 | } | |
7541 | ||
7542 | relocation = (lsect->section->output_offset | |
7543 | + linker_section_ptr->offset | |
7544 | - lsect->hole_offset | |
7545 | - lsect->sym_offset); | |
7546 | ||
7547 | #ifdef DEBUG | |
a7b97311 AM |
7548 | fprintf (stderr, |
7549 | "Finish pointer in linker section %s, offset = %ld (0x%lx)\n", | |
7550 | lsect->name, (long) relocation, (long) relocation); | |
252b5132 RH |
7551 | #endif |
7552 | ||
7553 | /* Subtract out the addend, because it will get added back in by the normal | |
7554 | processing. */ | |
7555 | return relocation - linker_section_ptr->addend; | |
7556 | } | |
7557 | \f | |
7558 | /* Garbage collect unused sections. */ | |
7559 | ||
b34976b6 | 7560 | static bfd_boolean elf_gc_mark |
58821868 AM |
7561 | PARAMS ((struct bfd_link_info *, asection *, |
7562 | asection * (*) (asection *, struct bfd_link_info *, | |
7563 | Elf_Internal_Rela *, struct elf_link_hash_entry *, | |
7564 | Elf_Internal_Sym *))); | |
252b5132 | 7565 | |
b34976b6 | 7566 | static bfd_boolean elf_gc_sweep |
58821868 | 7567 | PARAMS ((struct bfd_link_info *, |
b34976b6 AM |
7568 | bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *, |
7569 | const Elf_Internal_Rela *))); | |
252b5132 | 7570 | |
b34976b6 | 7571 | static bfd_boolean elf_gc_sweep_symbol |
58821868 | 7572 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7573 | |
b34976b6 | 7574 | static bfd_boolean elf_gc_allocate_got_offsets |
58821868 | 7575 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7576 | |
b34976b6 | 7577 | static bfd_boolean elf_gc_propagate_vtable_entries_used |
58821868 | 7578 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 | 7579 | |
b34976b6 | 7580 | static bfd_boolean elf_gc_smash_unused_vtentry_relocs |
58821868 | 7581 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
252b5132 RH |
7582 | |
7583 | /* The mark phase of garbage collection. For a given section, mark | |
dbb410c3 AM |
7584 | it and any sections in this section's group, and all the sections |
7585 | which define symbols to which it refers. */ | |
252b5132 | 7586 | |
b34976b6 AM |
7587 | typedef asection * (*gc_mark_hook_fn) |
7588 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, | |
7589 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); | |
7590 | ||
7591 | static bfd_boolean | |
252b5132 RH |
7592 | elf_gc_mark (info, sec, gc_mark_hook) |
7593 | struct bfd_link_info *info; | |
7594 | asection *sec; | |
b34976b6 | 7595 | gc_mark_hook_fn gc_mark_hook; |
252b5132 | 7596 | { |
b34976b6 | 7597 | bfd_boolean ret; |
dbb410c3 | 7598 | asection *group_sec; |
252b5132 RH |
7599 | |
7600 | sec->gc_mark = 1; | |
7601 | ||
dbb410c3 AM |
7602 | /* Mark all the sections in the group. */ |
7603 | group_sec = elf_section_data (sec)->next_in_group; | |
7604 | if (group_sec && !group_sec->gc_mark) | |
7605 | if (!elf_gc_mark (info, group_sec, gc_mark_hook)) | |
b34976b6 | 7606 | return FALSE; |
252b5132 | 7607 | |
dbb410c3 | 7608 | /* Look through the section relocs. */ |
b34976b6 | 7609 | ret = TRUE; |
252b5132 RH |
7610 | if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0) |
7611 | { | |
7612 | Elf_Internal_Rela *relstart, *rel, *relend; | |
7613 | Elf_Internal_Shdr *symtab_hdr; | |
7614 | struct elf_link_hash_entry **sym_hashes; | |
7615 | size_t nlocsyms; | |
7616 | size_t extsymoff; | |
252b5132 | 7617 | bfd *input_bfd = sec->owner; |
c7ac6ff8 | 7618 | struct elf_backend_data *bed = get_elf_backend_data (input_bfd); |
6cdc0ccc | 7619 | Elf_Internal_Sym *isym = NULL; |
252b5132 RH |
7620 | |
7621 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
7622 | sym_hashes = elf_sym_hashes (input_bfd); | |
7623 | ||
7624 | /* Read the local symbols. */ | |
7625 | if (elf_bad_symtab (input_bfd)) | |
7626 | { | |
7627 | nlocsyms = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
c44233aa | 7628 | extsymoff = 0; |
252b5132 RH |
7629 | } |
7630 | else | |
7631 | extsymoff = nlocsyms = symtab_hdr->sh_info; | |
9ad5cbcf | 7632 | |
6cdc0ccc AM |
7633 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
7634 | if (isym == NULL && nlocsyms != 0) | |
9ad5cbcf | 7635 | { |
6cdc0ccc AM |
7636 | isym = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, nlocsyms, 0, |
7637 | NULL, NULL, NULL); | |
7638 | if (isym == NULL) | |
b34976b6 | 7639 | return FALSE; |
9ad5cbcf AM |
7640 | } |
7641 | ||
252b5132 RH |
7642 | /* Read the relocations. */ |
7643 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
6cdc0ccc | 7644 | (input_bfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
252b5132 RH |
7645 | info->keep_memory)); |
7646 | if (relstart == NULL) | |
7647 | { | |
b34976b6 | 7648 | ret = FALSE; |
252b5132 RH |
7649 | goto out1; |
7650 | } | |
c7ac6ff8 | 7651 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7652 | |
7653 | for (rel = relstart; rel < relend; rel++) | |
7654 | { | |
7655 | unsigned long r_symndx; | |
7656 | asection *rsec; | |
7657 | struct elf_link_hash_entry *h; | |
252b5132 RH |
7658 | |
7659 | r_symndx = ELF_R_SYM (rel->r_info); | |
7660 | if (r_symndx == 0) | |
7661 | continue; | |
7662 | ||
6cdc0ccc AM |
7663 | if (r_symndx >= nlocsyms |
7664 | || ELF_ST_BIND (isym[r_symndx].st_info) != STB_LOCAL) | |
252b5132 RH |
7665 | { |
7666 | h = sym_hashes[r_symndx - extsymoff]; | |
1e2f5b6e | 7667 | rsec = (*gc_mark_hook) (sec, info, rel, h, NULL); |
252b5132 RH |
7668 | } |
7669 | else | |
7670 | { | |
6cdc0ccc | 7671 | rsec = (*gc_mark_hook) (sec, info, rel, NULL, &isym[r_symndx]); |
252b5132 RH |
7672 | } |
7673 | ||
7674 | if (rsec && !rsec->gc_mark) | |
b91afed7 AM |
7675 | { |
7676 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour) | |
7677 | rsec->gc_mark = 1; | |
7678 | else if (!elf_gc_mark (info, rsec, gc_mark_hook)) | |
7679 | { | |
b34976b6 | 7680 | ret = FALSE; |
b91afed7 AM |
7681 | goto out2; |
7682 | } | |
7683 | } | |
252b5132 RH |
7684 | } |
7685 | ||
7686 | out2: | |
6cdc0ccc | 7687 | if (elf_section_data (sec)->relocs != relstart) |
252b5132 RH |
7688 | free (relstart); |
7689 | out1: | |
6cdc0ccc AM |
7690 | if (isym != NULL && symtab_hdr->contents != (unsigned char *) isym) |
7691 | { | |
7692 | if (! info->keep_memory) | |
7693 | free (isym); | |
7694 | else | |
7695 | symtab_hdr->contents = (unsigned char *) isym; | |
7696 | } | |
252b5132 RH |
7697 | } |
7698 | ||
7699 | return ret; | |
7700 | } | |
7701 | ||
7702 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
7703 | ||
b34976b6 AM |
7704 | typedef bfd_boolean (*gc_sweep_hook_fn) |
7705 | PARAMS ((bfd *, struct bfd_link_info *, asection *, | |
7706 | const Elf_Internal_Rela *)); | |
7707 | ||
7708 | static bfd_boolean | |
252b5132 RH |
7709 | elf_gc_sweep (info, gc_sweep_hook) |
7710 | struct bfd_link_info *info; | |
b34976b6 | 7711 | gc_sweep_hook_fn gc_sweep_hook; |
252b5132 RH |
7712 | { |
7713 | bfd *sub; | |
7714 | ||
7715 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7716 | { | |
7717 | asection *o; | |
7718 | ||
f6af82bd AM |
7719 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) |
7720 | continue; | |
7721 | ||
252b5132 RH |
7722 | for (o = sub->sections; o != NULL; o = o->next) |
7723 | { | |
7724 | /* Keep special sections. Keep .debug sections. */ | |
7725 | if ((o->flags & SEC_LINKER_CREATED) | |
7726 | || (o->flags & SEC_DEBUGGING)) | |
7727 | o->gc_mark = 1; | |
7728 | ||
7729 | if (o->gc_mark) | |
7730 | continue; | |
7731 | ||
7732 | /* Skip sweeping sections already excluded. */ | |
7733 | if (o->flags & SEC_EXCLUDE) | |
7734 | continue; | |
7735 | ||
7736 | /* Since this is early in the link process, it is simple | |
7737 | to remove a section from the output. */ | |
7738 | o->flags |= SEC_EXCLUDE; | |
7739 | ||
7740 | /* But we also have to update some of the relocation | |
7741 | info we collected before. */ | |
7742 | if (gc_sweep_hook | |
7743 | && (o->flags & SEC_RELOC) && o->reloc_count > 0) | |
7744 | { | |
7745 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 7746 | bfd_boolean r; |
252b5132 RH |
7747 | |
7748 | internal_relocs = (NAME(_bfd_elf,link_read_relocs) | |
7749 | (o->owner, o, NULL, NULL, info->keep_memory)); | |
7750 | if (internal_relocs == NULL) | |
b34976b6 | 7751 | return FALSE; |
252b5132 | 7752 | |
3e932841 | 7753 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); |
252b5132 | 7754 | |
6cdc0ccc | 7755 | if (elf_section_data (o)->relocs != internal_relocs) |
252b5132 RH |
7756 | free (internal_relocs); |
7757 | ||
7758 | if (!r) | |
b34976b6 | 7759 | return FALSE; |
252b5132 RH |
7760 | } |
7761 | } | |
7762 | } | |
7763 | ||
7764 | /* Remove the symbols that were in the swept sections from the dynamic | |
7765 | symbol table. GCFIXME: Anyone know how to get them out of the | |
7766 | static symbol table as well? */ | |
7767 | { | |
7768 | int i = 0; | |
7769 | ||
7770 | elf_link_hash_traverse (elf_hash_table (info), | |
7771 | elf_gc_sweep_symbol, | |
7772 | (PTR) &i); | |
7773 | ||
7774 | elf_hash_table (info)->dynsymcount = i; | |
7775 | } | |
7776 | ||
b34976b6 | 7777 | return TRUE; |
252b5132 RH |
7778 | } |
7779 | ||
7780 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ | |
7781 | ||
b34976b6 | 7782 | static bfd_boolean |
252b5132 RH |
7783 | elf_gc_sweep_symbol (h, idxptr) |
7784 | struct elf_link_hash_entry *h; | |
7785 | PTR idxptr; | |
7786 | { | |
7787 | int *idx = (int *) idxptr; | |
7788 | ||
e92d460e AM |
7789 | if (h->root.type == bfd_link_hash_warning) |
7790 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7791 | ||
252b5132 RH |
7792 | if (h->dynindx != -1 |
7793 | && ((h->root.type != bfd_link_hash_defined | |
7794 | && h->root.type != bfd_link_hash_defweak) | |
7795 | || h->root.u.def.section->gc_mark)) | |
7796 | h->dynindx = (*idx)++; | |
7797 | ||
b34976b6 | 7798 | return TRUE; |
252b5132 RH |
7799 | } |
7800 | ||
7801 | /* Propogate collected vtable information. This is called through | |
7802 | elf_link_hash_traverse. */ | |
7803 | ||
b34976b6 | 7804 | static bfd_boolean |
252b5132 RH |
7805 | elf_gc_propagate_vtable_entries_used (h, okp) |
7806 | struct elf_link_hash_entry *h; | |
7807 | PTR okp; | |
7808 | { | |
e92d460e AM |
7809 | if (h->root.type == bfd_link_hash_warning) |
7810 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7811 | ||
3e932841 | 7812 | /* Those that are not vtables. */ |
252b5132 | 7813 | if (h->vtable_parent == NULL) |
b34976b6 | 7814 | return TRUE; |
252b5132 RH |
7815 | |
7816 | /* Those vtables that do not have parents, we cannot merge. */ | |
7817 | if (h->vtable_parent == (struct elf_link_hash_entry *) -1) | |
b34976b6 | 7818 | return TRUE; |
252b5132 RH |
7819 | |
7820 | /* If we've already been done, exit. */ | |
7821 | if (h->vtable_entries_used && h->vtable_entries_used[-1]) | |
b34976b6 | 7822 | return TRUE; |
252b5132 RH |
7823 | |
7824 | /* Make sure the parent's table is up to date. */ | |
7825 | elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp); | |
7826 | ||
7827 | if (h->vtable_entries_used == NULL) | |
7828 | { | |
7829 | /* None of this table's entries were referenced. Re-use the | |
7830 | parent's table. */ | |
7831 | h->vtable_entries_used = h->vtable_parent->vtable_entries_used; | |
7832 | h->vtable_entries_size = h->vtable_parent->vtable_entries_size; | |
7833 | } | |
7834 | else | |
7835 | { | |
7836 | size_t n; | |
b34976b6 | 7837 | bfd_boolean *cu, *pu; |
252b5132 RH |
7838 | |
7839 | /* Or the parent's entries into ours. */ | |
7840 | cu = h->vtable_entries_used; | |
b34976b6 | 7841 | cu[-1] = TRUE; |
252b5132 RH |
7842 | pu = h->vtable_parent->vtable_entries_used; |
7843 | if (pu != NULL) | |
7844 | { | |
c44233aa AM |
7845 | asection *sec = h->root.u.def.section; |
7846 | struct elf_backend_data *bed = get_elf_backend_data (sec->owner); | |
7847 | int file_align = bed->s->file_align; | |
0d1ea5c0 CM |
7848 | |
7849 | n = h->vtable_parent->vtable_entries_size / file_align; | |
374b596d | 7850 | while (n--) |
252b5132 | 7851 | { |
374b596d | 7852 | if (*pu) |
b34976b6 | 7853 | *cu = TRUE; |
374b596d NC |
7854 | pu++; |
7855 | cu++; | |
252b5132 RH |
7856 | } |
7857 | } | |
7858 | } | |
7859 | ||
b34976b6 | 7860 | return TRUE; |
252b5132 RH |
7861 | } |
7862 | ||
b34976b6 | 7863 | static bfd_boolean |
252b5132 RH |
7864 | elf_gc_smash_unused_vtentry_relocs (h, okp) |
7865 | struct elf_link_hash_entry *h; | |
7866 | PTR okp; | |
7867 | { | |
7868 | asection *sec; | |
7869 | bfd_vma hstart, hend; | |
7870 | Elf_Internal_Rela *relstart, *relend, *rel; | |
c7ac6ff8 | 7871 | struct elf_backend_data *bed; |
0d1ea5c0 | 7872 | int file_align; |
252b5132 | 7873 | |
e92d460e AM |
7874 | if (h->root.type == bfd_link_hash_warning) |
7875 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7876 | ||
252b5132 RH |
7877 | /* Take care of both those symbols that do not describe vtables as |
7878 | well as those that are not loaded. */ | |
7879 | if (h->vtable_parent == NULL) | |
b34976b6 | 7880 | return TRUE; |
252b5132 RH |
7881 | |
7882 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
7883 | || h->root.type == bfd_link_hash_defweak); | |
7884 | ||
7885 | sec = h->root.u.def.section; | |
7886 | hstart = h->root.u.def.value; | |
7887 | hend = hstart + h->size; | |
7888 | ||
7889 | relstart = (NAME(_bfd_elf,link_read_relocs) | |
b34976b6 | 7890 | (sec->owner, sec, NULL, (Elf_Internal_Rela *) NULL, TRUE)); |
252b5132 | 7891 | if (!relstart) |
b34976b6 | 7892 | return *(bfd_boolean *) okp = FALSE; |
c7ac6ff8 | 7893 | bed = get_elf_backend_data (sec->owner); |
0d1ea5c0 CM |
7894 | file_align = bed->s->file_align; |
7895 | ||
c7ac6ff8 | 7896 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; |
252b5132 RH |
7897 | |
7898 | for (rel = relstart; rel < relend; ++rel) | |
7899 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
7900 | { | |
7901 | /* If the entry is in use, do nothing. */ | |
7902 | if (h->vtable_entries_used | |
7903 | && (rel->r_offset - hstart) < h->vtable_entries_size) | |
7904 | { | |
0d1ea5c0 | 7905 | bfd_vma entry = (rel->r_offset - hstart) / file_align; |
252b5132 RH |
7906 | if (h->vtable_entries_used[entry]) |
7907 | continue; | |
7908 | } | |
7909 | /* Otherwise, kill it. */ | |
7910 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
7911 | } | |
7912 | ||
b34976b6 | 7913 | return TRUE; |
252b5132 RH |
7914 | } |
7915 | ||
7916 | /* Do mark and sweep of unused sections. */ | |
7917 | ||
b34976b6 | 7918 | bfd_boolean |
252b5132 RH |
7919 | elf_gc_sections (abfd, info) |
7920 | bfd *abfd; | |
7921 | struct bfd_link_info *info; | |
7922 | { | |
b34976b6 | 7923 | bfd_boolean ok = TRUE; |
252b5132 RH |
7924 | bfd *sub; |
7925 | asection * (*gc_mark_hook) | |
1e2f5b6e | 7926 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
c44233aa | 7927 | struct elf_link_hash_entry *h, Elf_Internal_Sym *)); |
252b5132 RH |
7928 | |
7929 | if (!get_elf_backend_data (abfd)->can_gc_sections | |
6d3e950b | 7930 | || info->relocateable || info->emitrelocations |
252b5132 | 7931 | || elf_hash_table (info)->dynamic_sections_created) |
b34976b6 | 7932 | return TRUE; |
252b5132 RH |
7933 | |
7934 | /* Apply transitive closure to the vtable entry usage info. */ | |
7935 | elf_link_hash_traverse (elf_hash_table (info), | |
7936 | elf_gc_propagate_vtable_entries_used, | |
7937 | (PTR) &ok); | |
7938 | if (!ok) | |
b34976b6 | 7939 | return FALSE; |
252b5132 RH |
7940 | |
7941 | /* Kill the vtable relocations that were not used. */ | |
7942 | elf_link_hash_traverse (elf_hash_table (info), | |
7943 | elf_gc_smash_unused_vtentry_relocs, | |
7944 | (PTR) &ok); | |
7945 | if (!ok) | |
b34976b6 | 7946 | return FALSE; |
252b5132 RH |
7947 | |
7948 | /* Grovel through relocs to find out who stays ... */ | |
7949 | ||
7950 | gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook; | |
7951 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
7952 | { | |
7953 | asection *o; | |
f6af82bd AM |
7954 | |
7955 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
7956 | continue; | |
7957 | ||
252b5132 RH |
7958 | for (o = sub->sections; o != NULL; o = o->next) |
7959 | { | |
7960 | if (o->flags & SEC_KEEP) | |
c44233aa | 7961 | if (!elf_gc_mark (info, o, gc_mark_hook)) |
b34976b6 | 7962 | return FALSE; |
252b5132 RH |
7963 | } |
7964 | } | |
7965 | ||
7966 | /* ... and mark SEC_EXCLUDE for those that go. */ | |
a7b97311 | 7967 | if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook)) |
b34976b6 | 7968 | return FALSE; |
252b5132 | 7969 | |
b34976b6 | 7970 | return TRUE; |
252b5132 RH |
7971 | } |
7972 | \f | |
7973 | /* Called from check_relocs to record the existance of a VTINHERIT reloc. */ | |
7974 | ||
b34976b6 | 7975 | bfd_boolean |
252b5132 RH |
7976 | elf_gc_record_vtinherit (abfd, sec, h, offset) |
7977 | bfd *abfd; | |
7978 | asection *sec; | |
7979 | struct elf_link_hash_entry *h; | |
7980 | bfd_vma offset; | |
7981 | { | |
7982 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
7983 | struct elf_link_hash_entry **search, *child; | |
7984 | bfd_size_type extsymcount; | |
7985 | ||
7986 | /* The sh_info field of the symtab header tells us where the | |
7987 | external symbols start. We don't care about the local symbols at | |
7988 | this point. */ | |
7989 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size/sizeof (Elf_External_Sym); | |
7990 | if (!elf_bad_symtab (abfd)) | |
7991 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
7992 | ||
7993 | sym_hashes = elf_sym_hashes (abfd); | |
7994 | sym_hashes_end = sym_hashes + extsymcount; | |
7995 | ||
7996 | /* Hunt down the child symbol, which is in this section at the same | |
7997 | offset as the relocation. */ | |
7998 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
7999 | { | |
8000 | if ((child = *search) != NULL | |
8001 | && (child->root.type == bfd_link_hash_defined | |
8002 | || child->root.type == bfd_link_hash_defweak) | |
8003 | && child->root.u.def.section == sec | |
8004 | && child->root.u.def.value == offset) | |
8005 | goto win; | |
8006 | } | |
8007 | ||
8008 | (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT", | |
8f615d07 | 8009 | bfd_archive_filename (abfd), sec->name, |
a7b97311 | 8010 | (unsigned long) offset); |
252b5132 | 8011 | bfd_set_error (bfd_error_invalid_operation); |
b34976b6 | 8012 | return FALSE; |
252b5132 | 8013 | |
dc810e39 | 8014 | win: |
252b5132 RH |
8015 | if (!h) |
8016 | { | |
8017 | /* This *should* only be the absolute section. It could potentially | |
8018 | be that someone has defined a non-global vtable though, which | |
8019 | would be bad. It isn't worth paging in the local symbols to be | |
8020 | sure though; that case should simply be handled by the assembler. */ | |
8021 | ||
8022 | child->vtable_parent = (struct elf_link_hash_entry *) -1; | |
8023 | } | |
8024 | else | |
8025 | child->vtable_parent = h; | |
8026 | ||
b34976b6 | 8027 | return TRUE; |
252b5132 RH |
8028 | } |
8029 | ||
8030 | /* Called from check_relocs to record the existance of a VTENTRY reloc. */ | |
8031 | ||
b34976b6 | 8032 | bfd_boolean |
252b5132 | 8033 | elf_gc_record_vtentry (abfd, sec, h, addend) |
7442e600 ILT |
8034 | bfd *abfd ATTRIBUTE_UNUSED; |
8035 | asection *sec ATTRIBUTE_UNUSED; | |
252b5132 RH |
8036 | struct elf_link_hash_entry *h; |
8037 | bfd_vma addend; | |
8038 | { | |
0d1ea5c0 CM |
8039 | struct elf_backend_data *bed = get_elf_backend_data (abfd); |
8040 | int file_align = bed->s->file_align; | |
8041 | ||
252b5132 RH |
8042 | if (addend >= h->vtable_entries_size) |
8043 | { | |
8044 | size_t size, bytes; | |
b34976b6 | 8045 | bfd_boolean *ptr = h->vtable_entries_used; |
252b5132 RH |
8046 | |
8047 | /* While the symbol is undefined, we have to be prepared to handle | |
8048 | a zero size. */ | |
8049 | if (h->root.type == bfd_link_hash_undefined) | |
8050 | size = addend; | |
8051 | else | |
8052 | { | |
8053 | size = h->size; | |
8054 | if (size < addend) | |
8055 | { | |
8056 | /* Oops! We've got a reference past the defined end of | |
8057 | the table. This is probably a bug -- shall we warn? */ | |
8058 | size = addend; | |
8059 | } | |
8060 | } | |
8061 | ||
8062 | /* Allocate one extra entry for use as a "done" flag for the | |
8063 | consolidation pass. */ | |
b34976b6 | 8064 | bytes = (size / file_align + 1) * sizeof (bfd_boolean); |
252b5132 RH |
8065 | |
8066 | if (ptr) | |
8067 | { | |
dc810e39 | 8068 | ptr = bfd_realloc (ptr - 1, (bfd_size_type) bytes); |
3e932841 | 8069 | |
fed79cc6 NC |
8070 | if (ptr != NULL) |
8071 | { | |
8072 | size_t oldbytes; | |
252b5132 | 8073 | |
a7b97311 | 8074 | oldbytes = ((h->vtable_entries_size / file_align + 1) |
b34976b6 | 8075 | * sizeof (bfd_boolean)); |
a7b97311 | 8076 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); |
fed79cc6 | 8077 | } |
252b5132 RH |
8078 | } |
8079 | else | |
dc810e39 | 8080 | ptr = bfd_zmalloc ((bfd_size_type) bytes); |
252b5132 | 8081 | |
fed79cc6 | 8082 | if (ptr == NULL) |
b34976b6 | 8083 | return FALSE; |
3e932841 | 8084 | |
252b5132 | 8085 | /* And arrange for that done flag to be at index -1. */ |
fed79cc6 | 8086 | h->vtable_entries_used = ptr + 1; |
252b5132 RH |
8087 | h->vtable_entries_size = size; |
8088 | } | |
3e932841 | 8089 | |
b34976b6 | 8090 | h->vtable_entries_used[addend / file_align] = TRUE; |
252b5132 | 8091 | |
b34976b6 | 8092 | return TRUE; |
252b5132 RH |
8093 | } |
8094 | ||
8095 | /* And an accompanying bit to work out final got entry offsets once | |
8096 | we're done. Should be called from final_link. */ | |
8097 | ||
b34976b6 | 8098 | bfd_boolean |
252b5132 RH |
8099 | elf_gc_common_finalize_got_offsets (abfd, info) |
8100 | bfd *abfd; | |
8101 | struct bfd_link_info *info; | |
8102 | { | |
8103 | bfd *i; | |
8104 | struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8105 | bfd_vma gotoff; | |
8106 | ||
8107 | /* The GOT offset is relative to the .got section, but the GOT header is | |
8108 | put into the .got.plt section, if the backend uses it. */ | |
8109 | if (bed->want_got_plt) | |
8110 | gotoff = 0; | |
8111 | else | |
8112 | gotoff = bed->got_header_size; | |
8113 | ||
8114 | /* Do the local .got entries first. */ | |
8115 | for (i = info->input_bfds; i; i = i->link_next) | |
8116 | { | |
f6af82bd | 8117 | bfd_signed_vma *local_got; |
252b5132 RH |
8118 | bfd_size_type j, locsymcount; |
8119 | Elf_Internal_Shdr *symtab_hdr; | |
8120 | ||
f6af82bd AM |
8121 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) |
8122 | continue; | |
8123 | ||
8124 | local_got = elf_local_got_refcounts (i); | |
252b5132 RH |
8125 | if (!local_got) |
8126 | continue; | |
8127 | ||
8128 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
8129 | if (elf_bad_symtab (i)) | |
8130 | locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); | |
8131 | else | |
8132 | locsymcount = symtab_hdr->sh_info; | |
8133 | ||
8134 | for (j = 0; j < locsymcount; ++j) | |
8135 | { | |
8136 | if (local_got[j] > 0) | |
8137 | { | |
8138 | local_got[j] = gotoff; | |
8139 | gotoff += ARCH_SIZE / 8; | |
8140 | } | |
8141 | else | |
8142 | local_got[j] = (bfd_vma) -1; | |
8143 | } | |
8144 | } | |
8145 | ||
dd5724d5 AM |
8146 | /* Then the global .got entries. .plt refcounts are handled by |
8147 | adjust_dynamic_symbol */ | |
252b5132 RH |
8148 | elf_link_hash_traverse (elf_hash_table (info), |
8149 | elf_gc_allocate_got_offsets, | |
8150 | (PTR) &gotoff); | |
b34976b6 | 8151 | return TRUE; |
252b5132 RH |
8152 | } |
8153 | ||
8154 | /* We need a special top-level link routine to convert got reference counts | |
8155 | to real got offsets. */ | |
8156 | ||
b34976b6 | 8157 | static bfd_boolean |
252b5132 RH |
8158 | elf_gc_allocate_got_offsets (h, offarg) |
8159 | struct elf_link_hash_entry *h; | |
8160 | PTR offarg; | |
8161 | { | |
8162 | bfd_vma *off = (bfd_vma *) offarg; | |
8163 | ||
e92d460e AM |
8164 | if (h->root.type == bfd_link_hash_warning) |
8165 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8166 | ||
252b5132 RH |
8167 | if (h->got.refcount > 0) |
8168 | { | |
8169 | h->got.offset = off[0]; | |
8170 | off[0] += ARCH_SIZE / 8; | |
8171 | } | |
8172 | else | |
8173 | h->got.offset = (bfd_vma) -1; | |
8174 | ||
b34976b6 | 8175 | return TRUE; |
252b5132 RH |
8176 | } |
8177 | ||
8178 | /* Many folk need no more in the way of final link than this, once | |
8179 | got entry reference counting is enabled. */ | |
8180 | ||
b34976b6 | 8181 | bfd_boolean |
252b5132 RH |
8182 | elf_gc_common_final_link (abfd, info) |
8183 | bfd *abfd; | |
8184 | struct bfd_link_info *info; | |
8185 | { | |
8186 | if (!elf_gc_common_finalize_got_offsets (abfd, info)) | |
b34976b6 | 8187 | return FALSE; |
252b5132 RH |
8188 | |
8189 | /* Invoke the regular ELF backend linker to do all the work. */ | |
8190 | return elf_bfd_final_link (abfd, info); | |
8191 | } | |
8192 | ||
8193 | /* This function will be called though elf_link_hash_traverse to store | |
8194 | all hash value of the exported symbols in an array. */ | |
8195 | ||
b34976b6 | 8196 | static bfd_boolean |
252b5132 RH |
8197 | elf_collect_hash_codes (h, data) |
8198 | struct elf_link_hash_entry *h; | |
8199 | PTR data; | |
8200 | { | |
8201 | unsigned long **valuep = (unsigned long **) data; | |
8202 | const char *name; | |
8203 | char *p; | |
8204 | unsigned long ha; | |
8205 | char *alc = NULL; | |
8206 | ||
e92d460e AM |
8207 | if (h->root.type == bfd_link_hash_warning) |
8208 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8209 | ||
252b5132 RH |
8210 | /* Ignore indirect symbols. These are added by the versioning code. */ |
8211 | if (h->dynindx == -1) | |
b34976b6 | 8212 | return TRUE; |
252b5132 RH |
8213 | |
8214 | name = h->root.root.string; | |
8215 | p = strchr (name, ELF_VER_CHR); | |
8216 | if (p != NULL) | |
8217 | { | |
dc810e39 AM |
8218 | alc = bfd_malloc ((bfd_size_type) (p - name + 1)); |
8219 | memcpy (alc, name, (size_t) (p - name)); | |
252b5132 RH |
8220 | alc[p - name] = '\0'; |
8221 | name = alc; | |
8222 | } | |
8223 | ||
8224 | /* Compute the hash value. */ | |
8225 | ha = bfd_elf_hash (name); | |
8226 | ||
8227 | /* Store the found hash value in the array given as the argument. */ | |
8228 | *(*valuep)++ = ha; | |
8229 | ||
8230 | /* And store it in the struct so that we can put it in the hash table | |
8231 | later. */ | |
8232 | h->elf_hash_value = ha; | |
8233 | ||
8234 | if (alc != NULL) | |
8235 | free (alc); | |
8236 | ||
b34976b6 | 8237 | return TRUE; |
252b5132 | 8238 | } |
73d074b4 | 8239 | |
b34976b6 | 8240 | bfd_boolean |
73d074b4 DJ |
8241 | elf_reloc_symbol_deleted_p (offset, cookie) |
8242 | bfd_vma offset; | |
8243 | PTR cookie; | |
8244 | { | |
9ad5cbcf | 8245 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
73d074b4 DJ |
8246 | |
8247 | if (rcookie->bad_symtab) | |
8248 | rcookie->rel = rcookie->rels; | |
8249 | ||
8250 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
8251 | { | |
d6fe2dc1 | 8252 | unsigned long r_symndx; |
73d074b4 DJ |
8253 | |
8254 | if (! rcookie->bad_symtab) | |
8255 | if (rcookie->rel->r_offset > offset) | |
b34976b6 | 8256 | return FALSE; |
73d074b4 DJ |
8257 | if (rcookie->rel->r_offset != offset) |
8258 | continue; | |
8259 | ||
d6fe2dc1 AM |
8260 | r_symndx = ELF_R_SYM (rcookie->rel->r_info); |
8261 | if (r_symndx == SHN_UNDEF) | |
b34976b6 | 8262 | return TRUE; |
d6fe2dc1 | 8263 | |
73d074b4 | 8264 | if (r_symndx >= rcookie->locsymcount |
6cdc0ccc | 8265 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) |
73d074b4 DJ |
8266 | { |
8267 | struct elf_link_hash_entry *h; | |
8268 | ||
8269 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
8270 | ||
8271 | while (h->root.type == bfd_link_hash_indirect | |
8272 | || h->root.type == bfd_link_hash_warning) | |
8273 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8274 | ||
8275 | if ((h->root.type == bfd_link_hash_defined | |
8276 | || h->root.type == bfd_link_hash_defweak) | |
ed4de5e2 | 8277 | && elf_discarded_section (h->root.u.def.section)) |
b34976b6 | 8278 | return TRUE; |
73d074b4 | 8279 | else |
b34976b6 | 8280 | return FALSE; |
73d074b4 | 8281 | } |
6cdc0ccc | 8282 | else |
73d074b4 DJ |
8283 | { |
8284 | /* It's not a relocation against a global symbol, | |
44421011 | 8285 | but it could be a relocation against a local |
73d074b4 DJ |
8286 | symbol for a discarded section. */ |
8287 | asection *isec; | |
6cdc0ccc | 8288 | Elf_Internal_Sym *isym; |
73d074b4 DJ |
8289 | |
8290 | /* Need to: get the symbol; get the section. */ | |
6cdc0ccc AM |
8291 | isym = &rcookie->locsyms[r_symndx]; |
8292 | if (isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE) | |
73d074b4 | 8293 | { |
6cdc0ccc | 8294 | isec = section_from_elf_index (rcookie->abfd, isym->st_shndx); |
ed4de5e2 | 8295 | if (isec != NULL && elf_discarded_section (isec)) |
b34976b6 | 8296 | return TRUE; |
73d074b4 DJ |
8297 | } |
8298 | } | |
b34976b6 | 8299 | return FALSE; |
73d074b4 | 8300 | } |
b34976b6 | 8301 | return FALSE; |
73d074b4 DJ |
8302 | } |
8303 | ||
8304 | /* Discard unneeded references to discarded sections. | |
b34976b6 | 8305 | Returns TRUE if any section's size was changed. */ |
73d074b4 | 8306 | /* This function assumes that the relocations are in sorted order, |
ab3acfbe | 8307 | which is true for all known assemblers. */ |
73d074b4 | 8308 | |
b34976b6 | 8309 | bfd_boolean |
65765700 JJ |
8310 | elf_bfd_discard_info (output_bfd, info) |
8311 | bfd *output_bfd; | |
73d074b4 DJ |
8312 | struct bfd_link_info *info; |
8313 | { | |
8314 | struct elf_reloc_cookie cookie; | |
126495ed | 8315 | asection *stab, *eh; |
73d074b4 | 8316 | Elf_Internal_Shdr *symtab_hdr; |
73d074b4 DJ |
8317 | struct elf_backend_data *bed; |
8318 | bfd *abfd; | |
99eb2ac8 | 8319 | unsigned int count; |
b34976b6 | 8320 | bfd_boolean ret = FALSE; |
73d074b4 | 8321 | |
d6fe2dc1 | 8322 | if (info->traditional_format |
73d074b4 | 8323 | || info->hash->creator->flavour != bfd_target_elf_flavour |
65765700 | 8324 | || ! is_elf_hash_table (info)) |
b34976b6 | 8325 | return FALSE; |
65765700 | 8326 | |
73d074b4 DJ |
8327 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
8328 | { | |
163c1c30 L |
8329 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
8330 | continue; | |
8331 | ||
73d074b4 DJ |
8332 | bed = get_elf_backend_data (abfd); |
8333 | ||
8334 | if ((abfd->flags & DYNAMIC) != 0) | |
8335 | continue; | |
8336 | ||
126495ed | 8337 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); |
2d36fe5f AH |
8338 | if (info->relocateable |
8339 | || (eh != NULL | |
8340 | && (eh->_raw_size == 0 | |
8341 | || bfd_is_abs_section (eh->output_section)))) | |
126495ed | 8342 | eh = NULL; |
65765700 | 8343 | |
99eb2ac8 AM |
8344 | stab = bfd_get_section_by_name (abfd, ".stab"); |
8345 | if (stab != NULL | |
8346 | && (stab->_raw_size == 0 | |
8347 | || bfd_is_abs_section (stab->output_section) | |
68bfbfcc | 8348 | || stab->sec_info_type != ELF_INFO_TYPE_STABS)) |
99eb2ac8 AM |
8349 | stab = NULL; |
8350 | ||
8351 | if (stab == NULL | |
8352 | && eh == NULL | |
8353 | && bed->elf_backend_discard_info == NULL) | |
73d074b4 DJ |
8354 | continue; |
8355 | ||
8356 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
73d074b4 DJ |
8357 | cookie.abfd = abfd; |
8358 | cookie.sym_hashes = elf_sym_hashes (abfd); | |
8359 | cookie.bad_symtab = elf_bad_symtab (abfd); | |
8360 | if (cookie.bad_symtab) | |
8361 | { | |
99eb2ac8 | 8362 | cookie.locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym); |
73d074b4 DJ |
8363 | cookie.extsymoff = 0; |
8364 | } | |
8365 | else | |
8366 | { | |
8367 | cookie.locsymcount = symtab_hdr->sh_info; | |
8368 | cookie.extsymoff = symtab_hdr->sh_info; | |
8369 | } | |
8370 | ||
6cdc0ccc AM |
8371 | cookie.locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
8372 | if (cookie.locsyms == NULL && cookie.locsymcount != 0) | |
c44233aa | 8373 | { |
6cdc0ccc AM |
8374 | cookie.locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
8375 | cookie.locsymcount, 0, | |
8376 | NULL, NULL, NULL); | |
c44233aa | 8377 | if (cookie.locsyms == NULL) |
b34976b6 | 8378 | return FALSE; |
9ad5cbcf | 8379 | } |
73d074b4 | 8380 | |
99eb2ac8 | 8381 | if (stab != NULL) |
73d074b4 | 8382 | { |
99eb2ac8 AM |
8383 | cookie.rels = NULL; |
8384 | count = stab->reloc_count; | |
8385 | if (count != 0) | |
8386 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) | |
8387 | (abfd, stab, (PTR) NULL, (Elf_Internal_Rela *) NULL, | |
8388 | info->keep_memory)); | |
8389 | if (cookie.rels != NULL) | |
73d074b4 DJ |
8390 | { |
8391 | cookie.rel = cookie.rels; | |
99eb2ac8 AM |
8392 | cookie.relend = cookie.rels; |
8393 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
65765700 JJ |
8394 | if (_bfd_discard_section_stabs (abfd, stab, |
8395 | elf_section_data (stab)->sec_info, | |
73d074b4 DJ |
8396 | elf_reloc_symbol_deleted_p, |
8397 | &cookie)) | |
b34976b6 | 8398 | ret = TRUE; |
6cdc0ccc | 8399 | if (elf_section_data (stab)->relocs != cookie.rels) |
73d074b4 DJ |
8400 | free (cookie.rels); |
8401 | } | |
8402 | } | |
8403 | ||
99eb2ac8 | 8404 | if (eh != NULL) |
65765700 JJ |
8405 | { |
8406 | cookie.rels = NULL; | |
99eb2ac8 AM |
8407 | count = eh->reloc_count; |
8408 | if (count != 0) | |
65765700 | 8409 | cookie.rels = (NAME(_bfd_elf,link_read_relocs) |
40b829d4 | 8410 | (abfd, eh, (PTR) NULL, (Elf_Internal_Rela *) NULL, |
65765700 | 8411 | info->keep_memory)); |
99eb2ac8 AM |
8412 | cookie.rel = cookie.rels; |
8413 | cookie.relend = cookie.rels; | |
8414 | if (cookie.rels != NULL) | |
8415 | cookie.relend += count * bed->s->int_rels_per_ext_rel; | |
8416 | ||
126495ed | 8417 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
65765700 JJ |
8418 | elf_reloc_symbol_deleted_p, |
8419 | &cookie)) | |
b34976b6 | 8420 | ret = TRUE; |
99eb2ac8 AM |
8421 | |
8422 | if (cookie.rels != NULL | |
8423 | && elf_section_data (eh)->relocs != cookie.rels) | |
65765700 JJ |
8424 | free (cookie.rels); |
8425 | } | |
8426 | ||
99eb2ac8 AM |
8427 | if (bed->elf_backend_discard_info != NULL |
8428 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
b34976b6 | 8429 | ret = TRUE; |
73d074b4 | 8430 | |
6cdc0ccc AM |
8431 | if (cookie.locsyms != NULL |
8432 | && symtab_hdr->contents != (unsigned char *) cookie.locsyms) | |
8433 | { | |
8434 | if (! info->keep_memory) | |
8435 | free (cookie.locsyms); | |
8436 | else | |
8437 | symtab_hdr->contents = (unsigned char *) cookie.locsyms; | |
8438 | } | |
73d074b4 | 8439 | } |
65765700 | 8440 | |
126495ed | 8441 | if (info->eh_frame_hdr |
2d36fe5f | 8442 | && !info->relocateable |
126495ed | 8443 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
b34976b6 | 8444 | ret = TRUE; |
99eb2ac8 | 8445 | |
73d074b4 DJ |
8446 | return ret; |
8447 | } | |
8448 | ||
b34976b6 | 8449 | static bfd_boolean |
73d074b4 DJ |
8450 | elf_section_ignore_discarded_relocs (sec) |
8451 | asection *sec; | |
8452 | { | |
40b829d4 AM |
8453 | struct elf_backend_data *bed; |
8454 | ||
68bfbfcc | 8455 | switch (sec->sec_info_type) |
65765700 JJ |
8456 | { |
8457 | case ELF_INFO_TYPE_STABS: | |
8458 | case ELF_INFO_TYPE_EH_FRAME: | |
b34976b6 | 8459 | return TRUE; |
65765700 JJ |
8460 | default: |
8461 | break; | |
8462 | } | |
40b829d4 AM |
8463 | |
8464 | bed = get_elf_backend_data (sec->owner); | |
8465 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
8466 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
b34976b6 | 8467 | return TRUE; |
65765700 | 8468 | |
b34976b6 | 8469 | return FALSE; |
73d074b4 | 8470 | } |