Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ELF linking support for BFD. |
b90efa5b | 2 | Copyright (C) 1995-2015 Free Software Foundation, Inc. |
252b5132 | 3 | |
8fdd7217 | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
8fdd7217 NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8fdd7217 | 9 | (at your option) any later version. |
252b5132 | 10 | |
8fdd7217 NC |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
252b5132 | 15 | |
8fdd7217 NC |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
53df40a4 | 23 | #include "bfd_stdint.h" |
252b5132 RH |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #define ARCH_SIZE 0 | |
27 | #include "elf-bfd.h" | |
4ad4eba5 | 28 | #include "safe-ctype.h" |
ccf2f652 | 29 | #include "libiberty.h" |
66eb6687 | 30 | #include "objalloc.h" |
252b5132 | 31 | |
28caa186 AM |
32 | /* This struct is used to pass information to routines called via |
33 | elf_link_hash_traverse which must return failure. */ | |
34 | ||
35 | struct elf_info_failed | |
36 | { | |
37 | struct bfd_link_info *info; | |
28caa186 AM |
38 | bfd_boolean failed; |
39 | }; | |
40 | ||
41 | /* This structure is used to pass information to | |
42 | _bfd_elf_link_find_version_dependencies. */ | |
43 | ||
44 | struct elf_find_verdep_info | |
45 | { | |
46 | /* General link information. */ | |
47 | struct bfd_link_info *info; | |
48 | /* The number of dependencies. */ | |
49 | unsigned int vers; | |
50 | /* Whether we had a failure. */ | |
51 | bfd_boolean failed; | |
52 | }; | |
53 | ||
54 | static bfd_boolean _bfd_elf_fix_symbol_flags | |
55 | (struct elf_link_hash_entry *, struct elf_info_failed *); | |
56 | ||
2f0c68f2 CM |
57 | asection * |
58 | _bfd_elf_section_for_symbol (struct elf_reloc_cookie *cookie, | |
59 | unsigned long r_symndx, | |
60 | bfd_boolean discard) | |
61 | { | |
62 | if (r_symndx >= cookie->locsymcount | |
63 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
64 | { | |
65 | struct elf_link_hash_entry *h; | |
66 | ||
67 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
68 | ||
69 | while (h->root.type == bfd_link_hash_indirect | |
70 | || h->root.type == bfd_link_hash_warning) | |
71 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
72 | ||
73 | if ((h->root.type == bfd_link_hash_defined | |
74 | || h->root.type == bfd_link_hash_defweak) | |
75 | && discarded_section (h->root.u.def.section)) | |
76 | return h->root.u.def.section; | |
77 | else | |
78 | return NULL; | |
79 | } | |
80 | else | |
81 | { | |
82 | /* It's not a relocation against a global symbol, | |
83 | but it could be a relocation against a local | |
84 | symbol for a discarded section. */ | |
85 | asection *isec; | |
86 | Elf_Internal_Sym *isym; | |
87 | ||
88 | /* Need to: get the symbol; get the section. */ | |
89 | isym = &cookie->locsyms[r_symndx]; | |
90 | isec = bfd_section_from_elf_index (cookie->abfd, isym->st_shndx); | |
91 | if (isec != NULL | |
92 | && discard ? discarded_section (isec) : 1) | |
93 | return isec; | |
94 | } | |
95 | return NULL; | |
96 | } | |
97 | ||
d98685ac AM |
98 | /* Define a symbol in a dynamic linkage section. */ |
99 | ||
100 | struct elf_link_hash_entry * | |
101 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
102 | struct bfd_link_info *info, | |
103 | asection *sec, | |
104 | const char *name) | |
105 | { | |
106 | struct elf_link_hash_entry *h; | |
107 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 108 | const struct elf_backend_data *bed; |
d98685ac AM |
109 | |
110 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
111 | if (h != NULL) | |
112 | { | |
113 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
114 | This is a symptom of a larger problem: Absolute symbols | |
115 | defined in shared libraries can't be overridden, because we | |
116 | lose the link to the bfd which is via the symbol section. */ | |
117 | h->root.type = bfd_link_hash_new; | |
118 | } | |
119 | ||
120 | bh = &h->root; | |
cf18fda4 | 121 | bed = get_elf_backend_data (abfd); |
d98685ac | 122 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, |
cf18fda4 | 123 | sec, 0, NULL, FALSE, bed->collect, |
d98685ac AM |
124 | &bh)) |
125 | return NULL; | |
126 | h = (struct elf_link_hash_entry *) bh; | |
127 | h->def_regular = 1; | |
e28df02b | 128 | h->non_elf = 0; |
12b2843a | 129 | h->root.linker_def = 1; |
d98685ac | 130 | h->type = STT_OBJECT; |
00b7642b AM |
131 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
132 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
d98685ac | 133 | |
ccabcbe5 | 134 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
d98685ac AM |
135 | return h; |
136 | } | |
137 | ||
b34976b6 | 138 | bfd_boolean |
268b6b39 | 139 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
140 | { |
141 | flagword flags; | |
aad5d350 | 142 | asection *s; |
252b5132 | 143 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 144 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 145 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
146 | |
147 | /* This function may be called more than once. */ | |
3d4d4302 AM |
148 | s = bfd_get_linker_section (abfd, ".got"); |
149 | if (s != NULL) | |
b34976b6 | 150 | return TRUE; |
252b5132 | 151 | |
e5a52504 | 152 | flags = bed->dynamic_sec_flags; |
252b5132 | 153 | |
14b2f831 AM |
154 | s = bfd_make_section_anyway_with_flags (abfd, |
155 | (bed->rela_plts_and_copies_p | |
156 | ? ".rela.got" : ".rel.got"), | |
157 | (bed->dynamic_sec_flags | |
158 | | SEC_READONLY)); | |
6de2ae4a L |
159 | if (s == NULL |
160 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
161 | return FALSE; | |
162 | htab->srelgot = s; | |
252b5132 | 163 | |
14b2f831 | 164 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
64e77c6d L |
165 | if (s == NULL |
166 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
167 | return FALSE; | |
168 | htab->sgot = s; | |
169 | ||
252b5132 RH |
170 | if (bed->want_got_plt) |
171 | { | |
14b2f831 | 172 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
252b5132 | 173 | if (s == NULL |
6de2ae4a L |
174 | || !bfd_set_section_alignment (abfd, s, |
175 | bed->s->log_file_align)) | |
b34976b6 | 176 | return FALSE; |
6de2ae4a | 177 | htab->sgotplt = s; |
252b5132 RH |
178 | } |
179 | ||
64e77c6d L |
180 | /* The first bit of the global offset table is the header. */ |
181 | s->size += bed->got_header_size; | |
182 | ||
2517a57f AM |
183 | if (bed->want_got_sym) |
184 | { | |
185 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
186 | (or .got.plt) section. We don't do this in the linker script | |
187 | because we don't want to define the symbol if we are not creating | |
188 | a global offset table. */ | |
6de2ae4a L |
189 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
190 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 191 | elf_hash_table (info)->hgot = h; |
d98685ac AM |
192 | if (h == NULL) |
193 | return FALSE; | |
2517a57f | 194 | } |
252b5132 | 195 | |
b34976b6 | 196 | return TRUE; |
252b5132 RH |
197 | } |
198 | \f | |
7e9f0867 AM |
199 | /* Create a strtab to hold the dynamic symbol names. */ |
200 | static bfd_boolean | |
201 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) | |
202 | { | |
203 | struct elf_link_hash_table *hash_table; | |
204 | ||
205 | hash_table = elf_hash_table (info); | |
206 | if (hash_table->dynobj == NULL) | |
207 | hash_table->dynobj = abfd; | |
208 | ||
209 | if (hash_table->dynstr == NULL) | |
210 | { | |
211 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
212 | if (hash_table->dynstr == NULL) | |
213 | return FALSE; | |
214 | } | |
215 | return TRUE; | |
216 | } | |
217 | ||
45d6a902 AM |
218 | /* Create some sections which will be filled in with dynamic linking |
219 | information. ABFD is an input file which requires dynamic sections | |
220 | to be created. The dynamic sections take up virtual memory space | |
221 | when the final executable is run, so we need to create them before | |
222 | addresses are assigned to the output sections. We work out the | |
223 | actual contents and size of these sections later. */ | |
252b5132 | 224 | |
b34976b6 | 225 | bfd_boolean |
268b6b39 | 226 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 227 | { |
45d6a902 | 228 | flagword flags; |
91d6fa6a | 229 | asection *s; |
9c5bfbb7 | 230 | const struct elf_backend_data *bed; |
9637f6ef | 231 | struct elf_link_hash_entry *h; |
252b5132 | 232 | |
0eddce27 | 233 | if (! is_elf_hash_table (info->hash)) |
45d6a902 AM |
234 | return FALSE; |
235 | ||
236 | if (elf_hash_table (info)->dynamic_sections_created) | |
237 | return TRUE; | |
238 | ||
7e9f0867 AM |
239 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
240 | return FALSE; | |
45d6a902 | 241 | |
7e9f0867 | 242 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
243 | bed = get_elf_backend_data (abfd); |
244 | ||
245 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
246 | |
247 | /* A dynamically linked executable has a .interp section, but a | |
248 | shared library does not. */ | |
9b8b325a | 249 | if (bfd_link_executable (info) && !info->nointerp) |
252b5132 | 250 | { |
14b2f831 AM |
251 | s = bfd_make_section_anyway_with_flags (abfd, ".interp", |
252 | flags | SEC_READONLY); | |
3496cb2a | 253 | if (s == NULL) |
45d6a902 AM |
254 | return FALSE; |
255 | } | |
bb0deeff | 256 | |
45d6a902 AM |
257 | /* Create sections to hold version informations. These are removed |
258 | if they are not needed. */ | |
14b2f831 AM |
259 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_d", |
260 | flags | SEC_READONLY); | |
45d6a902 | 261 | if (s == NULL |
45d6a902 AM |
262 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
263 | return FALSE; | |
264 | ||
14b2f831 AM |
265 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version", |
266 | flags | SEC_READONLY); | |
45d6a902 | 267 | if (s == NULL |
45d6a902 AM |
268 | || ! bfd_set_section_alignment (abfd, s, 1)) |
269 | return FALSE; | |
270 | ||
14b2f831 AM |
271 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_r", |
272 | flags | SEC_READONLY); | |
45d6a902 | 273 | if (s == NULL |
45d6a902 AM |
274 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
275 | return FALSE; | |
276 | ||
14b2f831 AM |
277 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsym", |
278 | flags | SEC_READONLY); | |
45d6a902 | 279 | if (s == NULL |
45d6a902 AM |
280 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
281 | return FALSE; | |
cae1fbbb | 282 | elf_hash_table (info)->dynsym = s; |
45d6a902 | 283 | |
14b2f831 AM |
284 | s = bfd_make_section_anyway_with_flags (abfd, ".dynstr", |
285 | flags | SEC_READONLY); | |
3496cb2a | 286 | if (s == NULL) |
45d6a902 AM |
287 | return FALSE; |
288 | ||
14b2f831 | 289 | s = bfd_make_section_anyway_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 290 | if (s == NULL |
45d6a902 AM |
291 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
292 | return FALSE; | |
293 | ||
294 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
295 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
296 | only want to define it if we are, in fact, creating a .dynamic | |
297 | section. We don't want to define it if there is no .dynamic | |
298 | section, since on some ELF platforms the start up code examines it | |
299 | to decide how to initialize the process. */ | |
9637f6ef L |
300 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"); |
301 | elf_hash_table (info)->hdynamic = h; | |
302 | if (h == NULL) | |
45d6a902 AM |
303 | return FALSE; |
304 | ||
fdc90cb4 JJ |
305 | if (info->emit_hash) |
306 | { | |
14b2f831 AM |
307 | s = bfd_make_section_anyway_with_flags (abfd, ".hash", |
308 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
309 | if (s == NULL |
310 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
311 | return FALSE; | |
312 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; | |
313 | } | |
314 | ||
315 | if (info->emit_gnu_hash) | |
316 | { | |
14b2f831 AM |
317 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.hash", |
318 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
319 | if (s == NULL |
320 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
321 | return FALSE; | |
322 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: | |
323 | 4 32-bit words followed by variable count of 64-bit words, then | |
324 | variable count of 32-bit words. */ | |
325 | if (bed->s->arch_size == 64) | |
326 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
327 | else | |
328 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
329 | } | |
45d6a902 AM |
330 | |
331 | /* Let the backend create the rest of the sections. This lets the | |
332 | backend set the right flags. The backend will normally create | |
333 | the .got and .plt sections. */ | |
894891db NC |
334 | if (bed->elf_backend_create_dynamic_sections == NULL |
335 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
45d6a902 AM |
336 | return FALSE; |
337 | ||
338 | elf_hash_table (info)->dynamic_sections_created = TRUE; | |
339 | ||
340 | return TRUE; | |
341 | } | |
342 | ||
343 | /* Create dynamic sections when linking against a dynamic object. */ | |
344 | ||
345 | bfd_boolean | |
268b6b39 | 346 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
347 | { |
348 | flagword flags, pltflags; | |
7325306f | 349 | struct elf_link_hash_entry *h; |
45d6a902 | 350 | asection *s; |
9c5bfbb7 | 351 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 352 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 353 | |
252b5132 RH |
354 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
355 | .rel[a].bss sections. */ | |
e5a52504 | 356 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
357 | |
358 | pltflags = flags; | |
252b5132 | 359 | if (bed->plt_not_loaded) |
6df4d94c MM |
360 | /* We do not clear SEC_ALLOC here because we still want the OS to |
361 | allocate space for the section; it's just that there's nothing | |
362 | to read in from the object file. */ | |
5d1634d7 | 363 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
364 | else |
365 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
366 | if (bed->plt_readonly) |
367 | pltflags |= SEC_READONLY; | |
368 | ||
14b2f831 | 369 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
252b5132 | 370 | if (s == NULL |
252b5132 | 371 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
b34976b6 | 372 | return FALSE; |
6de2ae4a | 373 | htab->splt = s; |
252b5132 | 374 | |
d98685ac AM |
375 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
376 | .plt section. */ | |
7325306f RS |
377 | if (bed->want_plt_sym) |
378 | { | |
379 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
380 | "_PROCEDURE_LINKAGE_TABLE_"); | |
381 | elf_hash_table (info)->hplt = h; | |
382 | if (h == NULL) | |
383 | return FALSE; | |
384 | } | |
252b5132 | 385 | |
14b2f831 AM |
386 | s = bfd_make_section_anyway_with_flags (abfd, |
387 | (bed->rela_plts_and_copies_p | |
388 | ? ".rela.plt" : ".rel.plt"), | |
389 | flags | SEC_READONLY); | |
252b5132 | 390 | if (s == NULL |
45d6a902 | 391 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 392 | return FALSE; |
6de2ae4a | 393 | htab->srelplt = s; |
252b5132 RH |
394 | |
395 | if (! _bfd_elf_create_got_section (abfd, info)) | |
b34976b6 | 396 | return FALSE; |
252b5132 | 397 | |
3018b441 RH |
398 | if (bed->want_dynbss) |
399 | { | |
400 | /* The .dynbss section is a place to put symbols which are defined | |
401 | by dynamic objects, are referenced by regular objects, and are | |
402 | not functions. We must allocate space for them in the process | |
403 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
404 | initialize them at run time. The linker script puts the .dynbss | |
405 | section into the .bss section of the final image. */ | |
14b2f831 AM |
406 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
407 | (SEC_ALLOC | SEC_LINKER_CREATED)); | |
3496cb2a | 408 | if (s == NULL) |
b34976b6 | 409 | return FALSE; |
252b5132 | 410 | |
3018b441 | 411 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
412 | normally needed. We need to create it here, though, so that the |
413 | linker will map it to an output section. We can't just create it | |
414 | only if we need it, because we will not know whether we need it | |
415 | until we have seen all the input files, and the first time the | |
416 | main linker code calls BFD after examining all the input files | |
417 | (size_dynamic_sections) the input sections have already been | |
418 | mapped to the output sections. If the section turns out not to | |
419 | be needed, we can discard it later. We will never need this | |
420 | section when generating a shared object, since they do not use | |
421 | copy relocs. */ | |
0e1862bb | 422 | if (! bfd_link_pic (info)) |
3018b441 | 423 | { |
14b2f831 AM |
424 | s = bfd_make_section_anyway_with_flags (abfd, |
425 | (bed->rela_plts_and_copies_p | |
426 | ? ".rela.bss" : ".rel.bss"), | |
427 | flags | SEC_READONLY); | |
3018b441 | 428 | if (s == NULL |
45d6a902 | 429 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 430 | return FALSE; |
3018b441 | 431 | } |
252b5132 RH |
432 | } |
433 | ||
b34976b6 | 434 | return TRUE; |
252b5132 RH |
435 | } |
436 | \f | |
252b5132 RH |
437 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
438 | read the input files, since we need to have a list of all of them | |
439 | before we can determine the final sizes of the output sections. | |
440 | Note that we may actually call this function even though we are not | |
441 | going to output any dynamic symbols; in some cases we know that a | |
442 | symbol should be in the dynamic symbol table, but only if there is | |
443 | one. */ | |
444 | ||
b34976b6 | 445 | bfd_boolean |
c152c796 AM |
446 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
447 | struct elf_link_hash_entry *h) | |
252b5132 RH |
448 | { |
449 | if (h->dynindx == -1) | |
450 | { | |
2b0f7ef9 | 451 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 452 | char *p; |
252b5132 | 453 | const char *name; |
252b5132 RH |
454 | bfd_size_type indx; |
455 | ||
7a13edea NC |
456 | /* XXX: The ABI draft says the linker must turn hidden and |
457 | internal symbols into STB_LOCAL symbols when producing the | |
458 | DSO. However, if ld.so honors st_other in the dynamic table, | |
459 | this would not be necessary. */ | |
460 | switch (ELF_ST_VISIBILITY (h->other)) | |
461 | { | |
462 | case STV_INTERNAL: | |
463 | case STV_HIDDEN: | |
9d6eee78 L |
464 | if (h->root.type != bfd_link_hash_undefined |
465 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 466 | { |
f5385ebf | 467 | h->forced_local = 1; |
67687978 PB |
468 | if (!elf_hash_table (info)->is_relocatable_executable) |
469 | return TRUE; | |
7a13edea | 470 | } |
0444bdd4 | 471 | |
7a13edea NC |
472 | default: |
473 | break; | |
474 | } | |
475 | ||
252b5132 RH |
476 | h->dynindx = elf_hash_table (info)->dynsymcount; |
477 | ++elf_hash_table (info)->dynsymcount; | |
478 | ||
479 | dynstr = elf_hash_table (info)->dynstr; | |
480 | if (dynstr == NULL) | |
481 | { | |
482 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 483 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 484 | if (dynstr == NULL) |
b34976b6 | 485 | return FALSE; |
252b5132 RH |
486 | } |
487 | ||
488 | /* We don't put any version information in the dynamic string | |
aad5d350 | 489 | table. */ |
252b5132 RH |
490 | name = h->root.root.string; |
491 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
492 | if (p != NULL) |
493 | /* We know that the p points into writable memory. In fact, | |
494 | there are only a few symbols that have read-only names, being | |
495 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
496 | by the backends. Most symbols will have names pointing into | |
497 | an ELF string table read from a file, or to objalloc memory. */ | |
498 | *p = 0; | |
499 | ||
500 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
501 | ||
502 | if (p != NULL) | |
503 | *p = ELF_VER_CHR; | |
252b5132 RH |
504 | |
505 | if (indx == (bfd_size_type) -1) | |
b34976b6 | 506 | return FALSE; |
252b5132 RH |
507 | h->dynstr_index = indx; |
508 | } | |
509 | ||
b34976b6 | 510 | return TRUE; |
252b5132 | 511 | } |
45d6a902 | 512 | \f |
55255dae L |
513 | /* Mark a symbol dynamic. */ |
514 | ||
28caa186 | 515 | static void |
55255dae | 516 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
517 | struct elf_link_hash_entry *h, |
518 | Elf_Internal_Sym *sym) | |
55255dae | 519 | { |
40b36307 | 520 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 521 | |
40b36307 | 522 | /* It may be called more than once on the same H. */ |
0e1862bb | 523 | if(h->dynamic || bfd_link_relocatable (info)) |
55255dae L |
524 | return; |
525 | ||
40b36307 L |
526 | if ((info->dynamic_data |
527 | && (h->type == STT_OBJECT | |
528 | || (sym != NULL | |
529 | && ELF_ST_TYPE (sym->st_info) == STT_OBJECT))) | |
a0c8462f | 530 | || (d != NULL |
40b36307 L |
531 | && h->root.type == bfd_link_hash_new |
532 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
55255dae L |
533 | h->dynamic = 1; |
534 | } | |
535 | ||
45d6a902 AM |
536 | /* Record an assignment to a symbol made by a linker script. We need |
537 | this in case some dynamic object refers to this symbol. */ | |
538 | ||
539 | bfd_boolean | |
fe21a8fc L |
540 | bfd_elf_record_link_assignment (bfd *output_bfd, |
541 | struct bfd_link_info *info, | |
268b6b39 | 542 | const char *name, |
fe21a8fc L |
543 | bfd_boolean provide, |
544 | bfd_boolean hidden) | |
45d6a902 | 545 | { |
00cbee0a | 546 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 547 | struct elf_link_hash_table *htab; |
00cbee0a | 548 | const struct elf_backend_data *bed; |
45d6a902 | 549 | |
0eddce27 | 550 | if (!is_elf_hash_table (info->hash)) |
45d6a902 AM |
551 | return TRUE; |
552 | ||
4ea42fb7 AM |
553 | htab = elf_hash_table (info); |
554 | h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE); | |
45d6a902 | 555 | if (h == NULL) |
4ea42fb7 | 556 | return provide; |
45d6a902 | 557 | |
00cbee0a | 558 | switch (h->root.type) |
77cfaee6 | 559 | { |
00cbee0a L |
560 | case bfd_link_hash_defined: |
561 | case bfd_link_hash_defweak: | |
562 | case bfd_link_hash_common: | |
563 | break; | |
564 | case bfd_link_hash_undefweak: | |
565 | case bfd_link_hash_undefined: | |
566 | /* Since we're defining the symbol, don't let it seem to have not | |
567 | been defined. record_dynamic_symbol and size_dynamic_sections | |
568 | may depend on this. */ | |
4ea42fb7 | 569 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
570 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
571 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
572 | break; |
573 | case bfd_link_hash_new: | |
40b36307 | 574 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); |
55255dae | 575 | h->non_elf = 0; |
00cbee0a L |
576 | break; |
577 | case bfd_link_hash_indirect: | |
578 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 579 | the versioned symbol point to this one. */ |
00cbee0a L |
580 | bed = get_elf_backend_data (output_bfd); |
581 | hv = h; | |
582 | while (hv->root.type == bfd_link_hash_indirect | |
583 | || hv->root.type == bfd_link_hash_warning) | |
584 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
585 | /* We don't need to update h->root.u since linker will set them | |
586 | later. */ | |
587 | h->root.type = bfd_link_hash_undefined; | |
588 | hv->root.type = bfd_link_hash_indirect; | |
589 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
590 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
591 | break; | |
592 | case bfd_link_hash_warning: | |
593 | abort (); | |
594 | break; | |
55255dae | 595 | } |
45d6a902 AM |
596 | |
597 | /* If this symbol is being provided by the linker script, and it is | |
598 | currently defined by a dynamic object, but not by a regular | |
599 | object, then mark it as undefined so that the generic linker will | |
600 | force the correct value. */ | |
601 | if (provide | |
f5385ebf AM |
602 | && h->def_dynamic |
603 | && !h->def_regular) | |
45d6a902 AM |
604 | h->root.type = bfd_link_hash_undefined; |
605 | ||
606 | /* If this symbol is not being provided by the linker script, and it is | |
607 | currently defined by a dynamic object, but not by a regular object, | |
608 | then clear out any version information because the symbol will not be | |
609 | associated with the dynamic object any more. */ | |
610 | if (!provide | |
f5385ebf AM |
611 | && h->def_dynamic |
612 | && !h->def_regular) | |
45d6a902 AM |
613 | h->verinfo.verdef = NULL; |
614 | ||
f5385ebf | 615 | h->def_regular = 1; |
45d6a902 | 616 | |
eb8476a6 | 617 | if (hidden) |
fe21a8fc | 618 | { |
91d6fa6a | 619 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
620 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
621 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
fe21a8fc L |
622 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
623 | } | |
624 | ||
6fa3860b PB |
625 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
626 | and executables. */ | |
0e1862bb | 627 | if (!bfd_link_relocatable (info) |
6fa3860b PB |
628 | && h->dynindx != -1 |
629 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
630 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
631 | h->forced_local = 1; | |
632 | ||
f5385ebf AM |
633 | if ((h->def_dynamic |
634 | || h->ref_dynamic | |
0e1862bb | 635 | || bfd_link_pic (info) |
3cbc1e5e | 636 | || (bfd_link_pde (info) |
0e1862bb | 637 | && elf_hash_table (info)->is_relocatable_executable)) |
45d6a902 AM |
638 | && h->dynindx == -1) |
639 | { | |
c152c796 | 640 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
45d6a902 AM |
641 | return FALSE; |
642 | ||
643 | /* If this is a weak defined symbol, and we know a corresponding | |
644 | real symbol from the same dynamic object, make sure the real | |
645 | symbol is also made into a dynamic symbol. */ | |
f6e332e6 AM |
646 | if (h->u.weakdef != NULL |
647 | && h->u.weakdef->dynindx == -1) | |
45d6a902 | 648 | { |
f6e332e6 | 649 | if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
45d6a902 AM |
650 | return FALSE; |
651 | } | |
652 | } | |
653 | ||
654 | return TRUE; | |
655 | } | |
42751cf3 | 656 | |
8c58d23b AM |
657 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
658 | success, and 2 on a failure caused by attempting to record a symbol | |
659 | in a discarded section, eg. a discarded link-once section symbol. */ | |
660 | ||
661 | int | |
c152c796 AM |
662 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
663 | bfd *input_bfd, | |
664 | long input_indx) | |
8c58d23b AM |
665 | { |
666 | bfd_size_type amt; | |
667 | struct elf_link_local_dynamic_entry *entry; | |
668 | struct elf_link_hash_table *eht; | |
669 | struct elf_strtab_hash *dynstr; | |
670 | unsigned long dynstr_index; | |
671 | char *name; | |
672 | Elf_External_Sym_Shndx eshndx; | |
673 | char esym[sizeof (Elf64_External_Sym)]; | |
674 | ||
0eddce27 | 675 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
676 | return 0; |
677 | ||
678 | /* See if the entry exists already. */ | |
679 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
680 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
681 | return 1; | |
682 | ||
683 | amt = sizeof (*entry); | |
a50b1753 | 684 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
685 | if (entry == NULL) |
686 | return 0; | |
687 | ||
688 | /* Go find the symbol, so that we can find it's name. */ | |
689 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 690 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
691 | { |
692 | bfd_release (input_bfd, entry); | |
693 | return 0; | |
694 | } | |
695 | ||
696 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 697 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
698 | { |
699 | asection *s; | |
700 | ||
701 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
702 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
703 | { | |
704 | /* We can still bfd_release here as nothing has done another | |
705 | bfd_alloc. We can't do this later in this function. */ | |
706 | bfd_release (input_bfd, entry); | |
707 | return 2; | |
708 | } | |
709 | } | |
710 | ||
711 | name = (bfd_elf_string_from_elf_section | |
712 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
713 | entry->isym.st_name)); | |
714 | ||
715 | dynstr = elf_hash_table (info)->dynstr; | |
716 | if (dynstr == NULL) | |
717 | { | |
718 | /* Create a strtab to hold the dynamic symbol names. */ | |
719 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
720 | if (dynstr == NULL) | |
721 | return 0; | |
722 | } | |
723 | ||
b34976b6 | 724 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, FALSE); |
8c58d23b AM |
725 | if (dynstr_index == (unsigned long) -1) |
726 | return 0; | |
727 | entry->isym.st_name = dynstr_index; | |
728 | ||
729 | eht = elf_hash_table (info); | |
730 | ||
731 | entry->next = eht->dynlocal; | |
732 | eht->dynlocal = entry; | |
733 | entry->input_bfd = input_bfd; | |
734 | entry->input_indx = input_indx; | |
735 | eht->dynsymcount++; | |
736 | ||
737 | /* Whatever binding the symbol had before, it's now local. */ | |
738 | entry->isym.st_info | |
739 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
740 | ||
741 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
742 | ||
743 | return 1; | |
744 | } | |
745 | ||
30b30c21 | 746 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 747 | |
30b30c21 | 748 | long |
268b6b39 AM |
749 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
750 | bfd *input_bfd, | |
751 | long input_indx) | |
30b30c21 RH |
752 | { |
753 | struct elf_link_local_dynamic_entry *e; | |
754 | ||
755 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
756 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
757 | return e->dynindx; | |
758 | return -1; | |
759 | } | |
760 | ||
761 | /* This function is used to renumber the dynamic symbols, if some of | |
762 | them are removed because they are marked as local. This is called | |
763 | via elf_link_hash_traverse. */ | |
764 | ||
b34976b6 | 765 | static bfd_boolean |
268b6b39 AM |
766 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
767 | void *data) | |
42751cf3 | 768 | { |
a50b1753 | 769 | size_t *count = (size_t *) data; |
30b30c21 | 770 | |
6fa3860b PB |
771 | if (h->forced_local) |
772 | return TRUE; | |
773 | ||
774 | if (h->dynindx != -1) | |
775 | h->dynindx = ++(*count); | |
776 | ||
777 | return TRUE; | |
778 | } | |
779 | ||
780 | ||
781 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
782 | STB_LOCAL binding. */ | |
783 | ||
784 | static bfd_boolean | |
785 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, | |
786 | void *data) | |
787 | { | |
a50b1753 | 788 | size_t *count = (size_t *) data; |
6fa3860b | 789 | |
6fa3860b PB |
790 | if (!h->forced_local) |
791 | return TRUE; | |
792 | ||
42751cf3 | 793 | if (h->dynindx != -1) |
30b30c21 RH |
794 | h->dynindx = ++(*count); |
795 | ||
b34976b6 | 796 | return TRUE; |
42751cf3 | 797 | } |
30b30c21 | 798 | |
aee6f5b4 AO |
799 | /* Return true if the dynamic symbol for a given section should be |
800 | omitted when creating a shared library. */ | |
801 | bfd_boolean | |
802 | _bfd_elf_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
803 | struct bfd_link_info *info, | |
804 | asection *p) | |
805 | { | |
74541ad4 | 806 | struct elf_link_hash_table *htab; |
ca55926c | 807 | asection *ip; |
74541ad4 | 808 | |
aee6f5b4 AO |
809 | switch (elf_section_data (p)->this_hdr.sh_type) |
810 | { | |
811 | case SHT_PROGBITS: | |
812 | case SHT_NOBITS: | |
813 | /* If sh_type is yet undecided, assume it could be | |
814 | SHT_PROGBITS/SHT_NOBITS. */ | |
815 | case SHT_NULL: | |
74541ad4 AM |
816 | htab = elf_hash_table (info); |
817 | if (p == htab->tls_sec) | |
818 | return FALSE; | |
819 | ||
820 | if (htab->text_index_section != NULL) | |
821 | return p != htab->text_index_section && p != htab->data_index_section; | |
822 | ||
ca55926c | 823 | return (htab->dynobj != NULL |
3d4d4302 | 824 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
ca55926c | 825 | && ip->output_section == p); |
aee6f5b4 AO |
826 | |
827 | /* There shouldn't be section relative relocations | |
828 | against any other section. */ | |
829 | default: | |
830 | return TRUE; | |
831 | } | |
832 | } | |
833 | ||
062e2358 | 834 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
835 | symbol for each output section, which come first. Next come symbols |
836 | which have been forced to local binding. Then all of the back-end | |
837 | allocated local dynamic syms, followed by the rest of the global | |
838 | symbols. */ | |
30b30c21 | 839 | |
554220db AM |
840 | static unsigned long |
841 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
842 | struct bfd_link_info *info, | |
843 | unsigned long *section_sym_count) | |
30b30c21 RH |
844 | { |
845 | unsigned long dynsymcount = 0; | |
846 | ||
0e1862bb L |
847 | if (bfd_link_pic (info) |
848 | || elf_hash_table (info)->is_relocatable_executable) | |
30b30c21 | 849 | { |
aee6f5b4 | 850 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
851 | asection *p; |
852 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 853 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 AO |
854 | && (p->flags & SEC_ALLOC) != 0 |
855 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) | |
856 | elf_section_data (p)->dynindx = ++dynsymcount; | |
74541ad4 AM |
857 | else |
858 | elf_section_data (p)->dynindx = 0; | |
30b30c21 | 859 | } |
554220db | 860 | *section_sym_count = dynsymcount; |
30b30c21 | 861 | |
6fa3860b PB |
862 | elf_link_hash_traverse (elf_hash_table (info), |
863 | elf_link_renumber_local_hash_table_dynsyms, | |
864 | &dynsymcount); | |
865 | ||
30b30c21 RH |
866 | if (elf_hash_table (info)->dynlocal) |
867 | { | |
868 | struct elf_link_local_dynamic_entry *p; | |
869 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
870 | p->dynindx = ++dynsymcount; | |
871 | } | |
872 | ||
873 | elf_link_hash_traverse (elf_hash_table (info), | |
874 | elf_link_renumber_hash_table_dynsyms, | |
875 | &dynsymcount); | |
876 | ||
877 | /* There is an unused NULL entry at the head of the table which | |
878 | we must account for in our count. Unless there weren't any | |
879 | symbols, which means we'll have no table at all. */ | |
880 | if (dynsymcount != 0) | |
881 | ++dynsymcount; | |
882 | ||
ccabcbe5 AM |
883 | elf_hash_table (info)->dynsymcount = dynsymcount; |
884 | return dynsymcount; | |
30b30c21 | 885 | } |
252b5132 | 886 | |
54ac0771 L |
887 | /* Merge st_other field. */ |
888 | ||
889 | static void | |
890 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
b8417128 | 891 | const Elf_Internal_Sym *isym, asection *sec, |
cd3416da | 892 | bfd_boolean definition, bfd_boolean dynamic) |
54ac0771 L |
893 | { |
894 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
895 | ||
896 | /* If st_other has a processor-specific meaning, specific | |
cd3416da | 897 | code might be needed here. */ |
54ac0771 L |
898 | if (bed->elf_backend_merge_symbol_attribute) |
899 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
900 | dynamic); | |
901 | ||
cd3416da | 902 | if (!dynamic) |
54ac0771 | 903 | { |
cd3416da AM |
904 | unsigned symvis = ELF_ST_VISIBILITY (isym->st_other); |
905 | unsigned hvis = ELF_ST_VISIBILITY (h->other); | |
54ac0771 | 906 | |
cd3416da AM |
907 | /* Keep the most constraining visibility. Leave the remainder |
908 | of the st_other field to elf_backend_merge_symbol_attribute. */ | |
909 | if (symvis - 1 < hvis - 1) | |
910 | h->other = symvis | (h->other & ~ELF_ST_VISIBILITY (-1)); | |
54ac0771 | 911 | } |
b8417128 AM |
912 | else if (definition |
913 | && ELF_ST_VISIBILITY (isym->st_other) != STV_DEFAULT | |
914 | && (sec->flags & SEC_READONLY) == 0) | |
6cabe1ea | 915 | h->protected_def = 1; |
54ac0771 L |
916 | } |
917 | ||
4f3fedcf AM |
918 | /* This function is called when we want to merge a new symbol with an |
919 | existing symbol. It handles the various cases which arise when we | |
920 | find a definition in a dynamic object, or when there is already a | |
921 | definition in a dynamic object. The new symbol is described by | |
922 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
923 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
924 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
925 | of an old common symbol. We set OVERRIDE if the old symbol is | |
926 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
927 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
928 | to change. By OK to change, we mean that we shouldn't warn if the | |
929 | type or size does change. */ | |
45d6a902 | 930 | |
8a56bd02 | 931 | static bfd_boolean |
268b6b39 AM |
932 | _bfd_elf_merge_symbol (bfd *abfd, |
933 | struct bfd_link_info *info, | |
934 | const char *name, | |
935 | Elf_Internal_Sym *sym, | |
936 | asection **psec, | |
937 | bfd_vma *pvalue, | |
4f3fedcf AM |
938 | struct elf_link_hash_entry **sym_hash, |
939 | bfd **poldbfd, | |
37a9e49a | 940 | bfd_boolean *pold_weak, |
af44c138 | 941 | unsigned int *pold_alignment, |
268b6b39 AM |
942 | bfd_boolean *skip, |
943 | bfd_boolean *override, | |
944 | bfd_boolean *type_change_ok, | |
6e33951e L |
945 | bfd_boolean *size_change_ok, |
946 | bfd_boolean *matched) | |
252b5132 | 947 | { |
7479dfd4 | 948 | asection *sec, *oldsec; |
45d6a902 | 949 | struct elf_link_hash_entry *h; |
90c984fc | 950 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
951 | struct elf_link_hash_entry *flip; |
952 | int bind; | |
953 | bfd *oldbfd; | |
954 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
0a36a439 | 955 | bfd_boolean newweak, oldweak, newfunc, oldfunc; |
a4d8e49b | 956 | const struct elf_backend_data *bed; |
6e33951e | 957 | char *new_version; |
45d6a902 AM |
958 | |
959 | *skip = FALSE; | |
960 | *override = FALSE; | |
961 | ||
962 | sec = *psec; | |
963 | bind = ELF_ST_BIND (sym->st_info); | |
964 | ||
965 | if (! bfd_is_und_section (sec)) | |
966 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); | |
967 | else | |
968 | h = ((struct elf_link_hash_entry *) | |
969 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); | |
970 | if (h == NULL) | |
971 | return FALSE; | |
972 | *sym_hash = h; | |
252b5132 | 973 | |
88ba32a0 L |
974 | bed = get_elf_backend_data (abfd); |
975 | ||
6e33951e | 976 | /* NEW_VERSION is the symbol version of the new symbol. */ |
422f1182 | 977 | if (h->versioned != unversioned) |
6e33951e | 978 | { |
422f1182 L |
979 | /* Symbol version is unknown or versioned. */ |
980 | new_version = strrchr (name, ELF_VER_CHR); | |
981 | if (new_version) | |
982 | { | |
983 | if (h->versioned == unknown) | |
984 | { | |
985 | if (new_version > name && new_version[-1] != ELF_VER_CHR) | |
986 | h->versioned = versioned_hidden; | |
987 | else | |
988 | h->versioned = versioned; | |
989 | } | |
990 | new_version += 1; | |
991 | if (new_version[0] == '\0') | |
992 | new_version = NULL; | |
993 | } | |
994 | else | |
995 | h->versioned = unversioned; | |
6e33951e | 996 | } |
422f1182 L |
997 | else |
998 | new_version = NULL; | |
6e33951e | 999 | |
90c984fc L |
1000 | /* For merging, we only care about real symbols. But we need to make |
1001 | sure that indirect symbol dynamic flags are updated. */ | |
1002 | hi = h; | |
45d6a902 AM |
1003 | while (h->root.type == bfd_link_hash_indirect |
1004 | || h->root.type == bfd_link_hash_warning) | |
1005 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1006 | ||
6e33951e L |
1007 | if (!*matched) |
1008 | { | |
1009 | if (hi == h || h->root.type == bfd_link_hash_new) | |
1010 | *matched = TRUE; | |
1011 | else | |
1012 | { | |
1013 | /* OLD_HIDDEN is true if the existing symbol is only visibile | |
1014 | to the symbol with the same symbol version. NEW_HIDDEN is | |
1015 | true if the new symbol is only visibile to the symbol with | |
1016 | the same symbol version. */ | |
422f1182 L |
1017 | bfd_boolean old_hidden = h->versioned == versioned_hidden; |
1018 | bfd_boolean new_hidden = hi->versioned == versioned_hidden; | |
6e33951e L |
1019 | if (!old_hidden && !new_hidden) |
1020 | /* The new symbol matches the existing symbol if both | |
1021 | aren't hidden. */ | |
1022 | *matched = TRUE; | |
1023 | else | |
1024 | { | |
1025 | /* OLD_VERSION is the symbol version of the existing | |
1026 | symbol. */ | |
422f1182 L |
1027 | char *old_version; |
1028 | ||
1029 | if (h->versioned >= versioned) | |
1030 | old_version = strrchr (h->root.root.string, | |
1031 | ELF_VER_CHR) + 1; | |
1032 | else | |
1033 | old_version = NULL; | |
6e33951e L |
1034 | |
1035 | /* The new symbol matches the existing symbol if they | |
1036 | have the same symbol version. */ | |
1037 | *matched = (old_version == new_version | |
1038 | || (old_version != NULL | |
1039 | && new_version != NULL | |
1040 | && strcmp (old_version, new_version) == 0)); | |
1041 | } | |
1042 | } | |
1043 | } | |
1044 | ||
934bce08 AM |
1045 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
1046 | existing symbol. */ | |
1047 | ||
1048 | oldbfd = NULL; | |
1049 | oldsec = NULL; | |
1050 | switch (h->root.type) | |
1051 | { | |
1052 | default: | |
1053 | break; | |
1054 | ||
1055 | case bfd_link_hash_undefined: | |
1056 | case bfd_link_hash_undefweak: | |
1057 | oldbfd = h->root.u.undef.abfd; | |
1058 | break; | |
1059 | ||
1060 | case bfd_link_hash_defined: | |
1061 | case bfd_link_hash_defweak: | |
1062 | oldbfd = h->root.u.def.section->owner; | |
1063 | oldsec = h->root.u.def.section; | |
1064 | break; | |
1065 | ||
1066 | case bfd_link_hash_common: | |
1067 | oldbfd = h->root.u.c.p->section->owner; | |
1068 | oldsec = h->root.u.c.p->section; | |
1069 | if (pold_alignment) | |
1070 | *pold_alignment = h->root.u.c.p->alignment_power; | |
1071 | break; | |
1072 | } | |
1073 | if (poldbfd && *poldbfd == NULL) | |
1074 | *poldbfd = oldbfd; | |
1075 | ||
1076 | /* Differentiate strong and weak symbols. */ | |
1077 | newweak = bind == STB_WEAK; | |
1078 | oldweak = (h->root.type == bfd_link_hash_defweak | |
1079 | || h->root.type == bfd_link_hash_undefweak); | |
1080 | if (pold_weak) | |
1081 | *pold_weak = oldweak; | |
1082 | ||
1083 | /* This code is for coping with dynamic objects, and is only useful | |
1084 | if we are doing an ELF link. */ | |
1085 | if (!(*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
1086 | return TRUE; | |
1087 | ||
40b36307 | 1088 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1089 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1090 | symbols. */ |
1091 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1092 | ||
ee659f1f AM |
1093 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1094 | respectively, is from a dynamic object. */ | |
1095 | ||
1096 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1097 | ||
1098 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1099 | syms and defined syms in dynamic libraries respectively. | |
1100 | ref_dynamic on the other hand can be set for a symbol defined in | |
1101 | a dynamic library, and def_dynamic may not be set; When the | |
1102 | definition in a dynamic lib is overridden by a definition in the | |
1103 | executable use of the symbol in the dynamic lib becomes a | |
1104 | reference to the executable symbol. */ | |
1105 | if (newdyn) | |
1106 | { | |
1107 | if (bfd_is_und_section (sec)) | |
1108 | { | |
1109 | if (bind != STB_WEAK) | |
1110 | { | |
1111 | h->ref_dynamic_nonweak = 1; | |
1112 | hi->ref_dynamic_nonweak = 1; | |
1113 | } | |
1114 | } | |
1115 | else | |
1116 | { | |
6e33951e L |
1117 | /* Update the existing symbol only if they match. */ |
1118 | if (*matched) | |
1119 | h->dynamic_def = 1; | |
ee659f1f AM |
1120 | hi->dynamic_def = 1; |
1121 | } | |
1122 | } | |
1123 | ||
45d6a902 AM |
1124 | /* If we just created the symbol, mark it as being an ELF symbol. |
1125 | Other than that, there is nothing to do--there is no merge issue | |
1126 | with a newly defined symbol--so we just return. */ | |
1127 | ||
1128 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1129 | { |
f5385ebf | 1130 | h->non_elf = 0; |
45d6a902 AM |
1131 | return TRUE; |
1132 | } | |
252b5132 | 1133 | |
45d6a902 AM |
1134 | /* In cases involving weak versioned symbols, we may wind up trying |
1135 | to merge a symbol with itself. Catch that here, to avoid the | |
1136 | confusion that results if we try to override a symbol with | |
1137 | itself. The additional tests catch cases like | |
1138 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1139 | dynamic object, which we do want to handle here. */ | |
1140 | if (abfd == oldbfd | |
895fa45f | 1141 | && (newweak || oldweak) |
45d6a902 | 1142 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1143 | || !h->def_regular)) |
45d6a902 AM |
1144 | return TRUE; |
1145 | ||
707bba77 | 1146 | olddyn = FALSE; |
45d6a902 AM |
1147 | if (oldbfd != NULL) |
1148 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1149 | else if (oldsec != NULL) |
45d6a902 | 1150 | { |
707bba77 | 1151 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1152 | indices used by MIPS ELF. */ |
707bba77 | 1153 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1154 | } |
252b5132 | 1155 | |
45d6a902 AM |
1156 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1157 | respectively, appear to be a definition rather than reference. */ | |
1158 | ||
707bba77 | 1159 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1160 | |
707bba77 AM |
1161 | olddef = (h->root.type != bfd_link_hash_undefined |
1162 | && h->root.type != bfd_link_hash_undefweak | |
1163 | && h->root.type != bfd_link_hash_common); | |
45d6a902 | 1164 | |
0a36a439 L |
1165 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1166 | respectively, appear to be a function. */ | |
1167 | ||
1168 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1169 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1170 | ||
1171 | oldfunc = (h->type != STT_NOTYPE | |
1172 | && bed->is_function_type (h->type)); | |
1173 | ||
580a2b6e L |
1174 | /* When we try to create a default indirect symbol from the dynamic |
1175 | definition with the default version, we skip it if its type and | |
40101021 | 1176 | the type of existing regular definition mismatch. */ |
580a2b6e | 1177 | if (pold_alignment == NULL |
580a2b6e L |
1178 | && newdyn |
1179 | && newdef | |
1180 | && !olddyn | |
4584ec12 L |
1181 | && (((olddef || h->root.type == bfd_link_hash_common) |
1182 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1183 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1184 | && h->type != STT_NOTYPE | |
1185 | && !(newfunc && oldfunc)) | |
1186 | || (olddef | |
1187 | && ((h->type == STT_GNU_IFUNC) | |
1188 | != (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))))) | |
580a2b6e L |
1189 | { |
1190 | *skip = TRUE; | |
1191 | return TRUE; | |
1192 | } | |
1193 | ||
4c34aff8 AM |
1194 | /* Check TLS symbols. We don't check undefined symbols introduced |
1195 | by "ld -u" which have no type (and oldbfd NULL), and we don't | |
1196 | check symbols from plugins because they also have no type. */ | |
1197 | if (oldbfd != NULL | |
1198 | && (oldbfd->flags & BFD_PLUGIN) == 0 | |
1199 | && (abfd->flags & BFD_PLUGIN) == 0 | |
1200 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1201 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1202 | { |
1203 | bfd *ntbfd, *tbfd; | |
1204 | bfd_boolean ntdef, tdef; | |
1205 | asection *ntsec, *tsec; | |
1206 | ||
1207 | if (h->type == STT_TLS) | |
1208 | { | |
3b36f7e6 | 1209 | ntbfd = abfd; |
7479dfd4 L |
1210 | ntsec = sec; |
1211 | ntdef = newdef; | |
1212 | tbfd = oldbfd; | |
1213 | tsec = oldsec; | |
1214 | tdef = olddef; | |
1215 | } | |
1216 | else | |
1217 | { | |
1218 | ntbfd = oldbfd; | |
1219 | ntsec = oldsec; | |
1220 | ntdef = olddef; | |
1221 | tbfd = abfd; | |
1222 | tsec = sec; | |
1223 | tdef = newdef; | |
1224 | } | |
1225 | ||
1226 | if (tdef && ntdef) | |
1227 | (*_bfd_error_handler) | |
191c0c42 AM |
1228 | (_("%s: TLS definition in %B section %A " |
1229 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1230 | tbfd, tsec, ntbfd, ntsec, h->root.root.string); |
1231 | else if (!tdef && !ntdef) | |
1232 | (*_bfd_error_handler) | |
191c0c42 AM |
1233 | (_("%s: TLS reference in %B " |
1234 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1235 | tbfd, ntbfd, h->root.root.string); |
1236 | else if (tdef) | |
1237 | (*_bfd_error_handler) | |
191c0c42 AM |
1238 | (_("%s: TLS definition in %B section %A " |
1239 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1240 | tbfd, tsec, ntbfd, h->root.root.string); |
1241 | else | |
1242 | (*_bfd_error_handler) | |
191c0c42 AM |
1243 | (_("%s: TLS reference in %B " |
1244 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1245 | tbfd, ntbfd, ntsec, h->root.root.string); |
1246 | ||
1247 | bfd_set_error (bfd_error_bad_value); | |
1248 | return FALSE; | |
1249 | } | |
1250 | ||
45d6a902 AM |
1251 | /* If the old symbol has non-default visibility, we ignore the new |
1252 | definition from a dynamic object. */ | |
1253 | if (newdyn | |
9c7a29a3 | 1254 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1255 | && !bfd_is_und_section (sec)) |
1256 | { | |
1257 | *skip = TRUE; | |
1258 | /* Make sure this symbol is dynamic. */ | |
f5385ebf | 1259 | h->ref_dynamic = 1; |
90c984fc | 1260 | hi->ref_dynamic = 1; |
45d6a902 AM |
1261 | /* A protected symbol has external availability. Make sure it is |
1262 | recorded as dynamic. | |
1263 | ||
1264 | FIXME: Should we check type and size for protected symbol? */ | |
1265 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1266 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 AM |
1267 | else |
1268 | return TRUE; | |
1269 | } | |
1270 | else if (!newdyn | |
9c7a29a3 | 1271 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1272 | && h->def_dynamic) |
45d6a902 AM |
1273 | { |
1274 | /* If the new symbol with non-default visibility comes from a | |
1275 | relocatable file and the old definition comes from a dynamic | |
1276 | object, we remove the old definition. */ | |
6c9b78e6 | 1277 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1278 | { |
1279 | /* Handle the case where the old dynamic definition is | |
1280 | default versioned. We need to copy the symbol info from | |
1281 | the symbol with default version to the normal one if it | |
1282 | was referenced before. */ | |
1283 | if (h->ref_regular) | |
1284 | { | |
6c9b78e6 | 1285 | hi->root.type = h->root.type; |
d2dee3b2 | 1286 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1287 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1288 | |
6c9b78e6 | 1289 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1290 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1291 | { |
aed81c4e MR |
1292 | /* If the new symbol is hidden or internal, completely undo |
1293 | any dynamic link state. */ | |
1294 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1295 | h->forced_local = 0; | |
1296 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1297 | } |
1298 | else | |
aed81c4e MR |
1299 | h->ref_dynamic = 1; |
1300 | ||
1301 | h->def_dynamic = 0; | |
aed81c4e MR |
1302 | /* FIXME: Should we check type and size for protected symbol? */ |
1303 | h->size = 0; | |
1304 | h->type = 0; | |
1305 | ||
6c9b78e6 | 1306 | h = hi; |
d2dee3b2 L |
1307 | } |
1308 | else | |
6c9b78e6 | 1309 | h = hi; |
d2dee3b2 | 1310 | } |
1de1a317 | 1311 | |
f5eda473 AM |
1312 | /* If the old symbol was undefined before, then it will still be |
1313 | on the undefs list. If the new symbol is undefined or | |
1314 | common, we can't make it bfd_link_hash_new here, because new | |
1315 | undefined or common symbols will be added to the undefs list | |
1316 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1317 | added twice to the undefs list. Also, if the new symbol is | |
1318 | undefweak then we don't want to lose the strong undef. */ | |
1319 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1320 | { |
1de1a317 | 1321 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1322 | h->root.u.undef.abfd = abfd; |
1323 | } | |
1324 | else | |
1325 | { | |
1326 | h->root.type = bfd_link_hash_new; | |
1327 | h->root.u.undef.abfd = NULL; | |
1328 | } | |
1329 | ||
f5eda473 | 1330 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1331 | { |
f5eda473 AM |
1332 | /* If the new symbol is hidden or internal, completely undo |
1333 | any dynamic link state. */ | |
1334 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1335 | h->forced_local = 0; | |
1336 | h->ref_dynamic = 0; | |
45d6a902 | 1337 | } |
f5eda473 AM |
1338 | else |
1339 | h->ref_dynamic = 1; | |
1340 | h->def_dynamic = 0; | |
45d6a902 AM |
1341 | /* FIXME: Should we check type and size for protected symbol? */ |
1342 | h->size = 0; | |
1343 | h->type = 0; | |
1344 | return TRUE; | |
1345 | } | |
14a793b2 | 1346 | |
15b43f48 AM |
1347 | /* If a new weak symbol definition comes from a regular file and the |
1348 | old symbol comes from a dynamic library, we treat the new one as | |
1349 | strong. Similarly, an old weak symbol definition from a regular | |
1350 | file is treated as strong when the new symbol comes from a dynamic | |
1351 | library. Further, an old weak symbol from a dynamic library is | |
1352 | treated as strong if the new symbol is from a dynamic library. | |
1353 | This reflects the way glibc's ld.so works. | |
1354 | ||
1355 | Do this before setting *type_change_ok or *size_change_ok so that | |
1356 | we warn properly when dynamic library symbols are overridden. */ | |
1357 | ||
1358 | if (newdef && !newdyn && olddyn) | |
0f8a2703 | 1359 | newweak = FALSE; |
15b43f48 | 1360 | if (olddef && newdyn) |
0f8a2703 AM |
1361 | oldweak = FALSE; |
1362 | ||
d334575b | 1363 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1364 | if (newfunc && oldfunc) |
fcb93ecf PB |
1365 | *type_change_ok = TRUE; |
1366 | ||
79349b09 AM |
1367 | /* It's OK to change the type if either the existing symbol or the |
1368 | new symbol is weak. A type change is also OK if the old symbol | |
1369 | is undefined and the new symbol is defined. */ | |
252b5132 | 1370 | |
79349b09 AM |
1371 | if (oldweak |
1372 | || newweak | |
1373 | || (newdef | |
1374 | && h->root.type == bfd_link_hash_undefined)) | |
1375 | *type_change_ok = TRUE; | |
1376 | ||
1377 | /* It's OK to change the size if either the existing symbol or the | |
1378 | new symbol is weak, or if the old symbol is undefined. */ | |
1379 | ||
1380 | if (*type_change_ok | |
1381 | || h->root.type == bfd_link_hash_undefined) | |
1382 | *size_change_ok = TRUE; | |
45d6a902 | 1383 | |
45d6a902 AM |
1384 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1385 | symbol, respectively, appears to be a common symbol in a dynamic | |
1386 | object. If a symbol appears in an uninitialized section, and is | |
1387 | not weak, and is not a function, then it may be a common symbol | |
1388 | which was resolved when the dynamic object was created. We want | |
1389 | to treat such symbols specially, because they raise special | |
1390 | considerations when setting the symbol size: if the symbol | |
1391 | appears as a common symbol in a regular object, and the size in | |
1392 | the regular object is larger, we must make sure that we use the | |
1393 | larger size. This problematic case can always be avoided in C, | |
1394 | but it must be handled correctly when using Fortran shared | |
1395 | libraries. | |
1396 | ||
1397 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1398 | likewise for OLDDYNCOMMON and OLDDEF. | |
1399 | ||
1400 | Note that this test is just a heuristic, and that it is quite | |
1401 | possible to have an uninitialized symbol in a shared object which | |
1402 | is really a definition, rather than a common symbol. This could | |
1403 | lead to some minor confusion when the symbol really is a common | |
1404 | symbol in some regular object. However, I think it will be | |
1405 | harmless. */ | |
1406 | ||
1407 | if (newdyn | |
1408 | && newdef | |
79349b09 | 1409 | && !newweak |
45d6a902 AM |
1410 | && (sec->flags & SEC_ALLOC) != 0 |
1411 | && (sec->flags & SEC_LOAD) == 0 | |
1412 | && sym->st_size > 0 | |
0a36a439 | 1413 | && !newfunc) |
45d6a902 AM |
1414 | newdyncommon = TRUE; |
1415 | else | |
1416 | newdyncommon = FALSE; | |
1417 | ||
1418 | if (olddyn | |
1419 | && olddef | |
1420 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1421 | && h->def_dynamic |
45d6a902 AM |
1422 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1423 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1424 | && h->size > 0 | |
0a36a439 | 1425 | && !oldfunc) |
45d6a902 AM |
1426 | olddyncommon = TRUE; |
1427 | else | |
1428 | olddyncommon = FALSE; | |
1429 | ||
a4d8e49b L |
1430 | /* We now know everything about the old and new symbols. We ask the |
1431 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1432 | if (bed->merge_symbol != NULL) |
1433 | { | |
1434 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
1435 | return FALSE; | |
1436 | sec = *psec; | |
1437 | } | |
a4d8e49b | 1438 | |
45d6a902 AM |
1439 | /* If both the old and the new symbols look like common symbols in a |
1440 | dynamic object, set the size of the symbol to the larger of the | |
1441 | two. */ | |
1442 | ||
1443 | if (olddyncommon | |
1444 | && newdyncommon | |
1445 | && sym->st_size != h->size) | |
1446 | { | |
1447 | /* Since we think we have two common symbols, issue a multiple | |
1448 | common warning if desired. Note that we only warn if the | |
1449 | size is different. If the size is the same, we simply let | |
1450 | the old symbol override the new one as normally happens with | |
1451 | symbols defined in dynamic objects. */ | |
1452 | ||
1453 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1454 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 | 1455 | return FALSE; |
252b5132 | 1456 | |
45d6a902 AM |
1457 | if (sym->st_size > h->size) |
1458 | h->size = sym->st_size; | |
252b5132 | 1459 | |
45d6a902 | 1460 | *size_change_ok = TRUE; |
252b5132 RH |
1461 | } |
1462 | ||
45d6a902 AM |
1463 | /* If we are looking at a dynamic object, and we have found a |
1464 | definition, we need to see if the symbol was already defined by | |
1465 | some other object. If so, we want to use the existing | |
1466 | definition, and we do not want to report a multiple symbol | |
1467 | definition error; we do this by clobbering *PSEC to be | |
1468 | bfd_und_section_ptr. | |
1469 | ||
1470 | We treat a common symbol as a definition if the symbol in the | |
1471 | shared library is a function, since common symbols always | |
1472 | represent variables; this can cause confusion in principle, but | |
1473 | any such confusion would seem to indicate an erroneous program or | |
1474 | shared library. We also permit a common symbol in a regular | |
79349b09 | 1475 | object to override a weak symbol in a shared object. */ |
45d6a902 AM |
1476 | |
1477 | if (newdyn | |
1478 | && newdef | |
77cfaee6 | 1479 | && (olddef |
45d6a902 | 1480 | || (h->root.type == bfd_link_hash_common |
0a36a439 | 1481 | && (newweak || newfunc)))) |
45d6a902 AM |
1482 | { |
1483 | *override = TRUE; | |
1484 | newdef = FALSE; | |
1485 | newdyncommon = FALSE; | |
252b5132 | 1486 | |
45d6a902 AM |
1487 | *psec = sec = bfd_und_section_ptr; |
1488 | *size_change_ok = TRUE; | |
252b5132 | 1489 | |
45d6a902 AM |
1490 | /* If we get here when the old symbol is a common symbol, then |
1491 | we are explicitly letting it override a weak symbol or | |
1492 | function in a dynamic object, and we don't want to warn about | |
1493 | a type change. If the old symbol is a defined symbol, a type | |
1494 | change warning may still be appropriate. */ | |
252b5132 | 1495 | |
45d6a902 AM |
1496 | if (h->root.type == bfd_link_hash_common) |
1497 | *type_change_ok = TRUE; | |
1498 | } | |
1499 | ||
1500 | /* Handle the special case of an old common symbol merging with a | |
1501 | new symbol which looks like a common symbol in a shared object. | |
1502 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1503 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1504 | right thing. */ | |
45d6a902 AM |
1505 | |
1506 | if (newdyncommon | |
1507 | && h->root.type == bfd_link_hash_common) | |
1508 | { | |
1509 | *override = TRUE; | |
1510 | newdef = FALSE; | |
1511 | newdyncommon = FALSE; | |
1512 | *pvalue = sym->st_size; | |
a4d8e49b | 1513 | *psec = sec = bed->common_section (oldsec); |
45d6a902 AM |
1514 | *size_change_ok = TRUE; |
1515 | } | |
1516 | ||
c5e2cead | 1517 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1518 | if (newdef && olddef && newweak) |
54ac0771 | 1519 | { |
35ed3f94 | 1520 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1521 | if (!(oldbfd != NULL |
1522 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1523 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c AM |
1524 | { |
1525 | newdef = FALSE; | |
1526 | *skip = TRUE; | |
1527 | } | |
54ac0771 L |
1528 | |
1529 | /* Merge st_other. If the symbol already has a dynamic index, | |
1530 | but visibility says it should not be visible, turn it into a | |
1531 | local symbol. */ | |
b8417128 | 1532 | elf_merge_st_other (abfd, h, sym, sec, newdef, newdyn); |
54ac0771 L |
1533 | if (h->dynindx != -1) |
1534 | switch (ELF_ST_VISIBILITY (h->other)) | |
1535 | { | |
1536 | case STV_INTERNAL: | |
1537 | case STV_HIDDEN: | |
1538 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1539 | break; | |
1540 | } | |
1541 | } | |
c5e2cead | 1542 | |
45d6a902 AM |
1543 | /* If the old symbol is from a dynamic object, and the new symbol is |
1544 | a definition which is not from a dynamic object, then the new | |
1545 | symbol overrides the old symbol. Symbols from regular files | |
1546 | always take precedence over symbols from dynamic objects, even if | |
1547 | they are defined after the dynamic object in the link. | |
1548 | ||
1549 | As above, we again permit a common symbol in a regular object to | |
1550 | override a definition in a shared object if the shared object | |
0f8a2703 | 1551 | symbol is a function or is weak. */ |
45d6a902 AM |
1552 | |
1553 | flip = NULL; | |
77cfaee6 | 1554 | if (!newdyn |
45d6a902 AM |
1555 | && (newdef |
1556 | || (bfd_is_com_section (sec) | |
0a36a439 | 1557 | && (oldweak || oldfunc))) |
45d6a902 AM |
1558 | && olddyn |
1559 | && olddef | |
f5385ebf | 1560 | && h->def_dynamic) |
45d6a902 AM |
1561 | { |
1562 | /* Change the hash table entry to undefined, and let | |
1563 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1564 | new definition. */ | |
1565 | ||
1566 | h->root.type = bfd_link_hash_undefined; | |
1567 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1568 | *size_change_ok = TRUE; | |
1569 | ||
1570 | olddef = FALSE; | |
1571 | olddyncommon = FALSE; | |
1572 | ||
1573 | /* We again permit a type change when a common symbol may be | |
1574 | overriding a function. */ | |
1575 | ||
1576 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1577 | { |
1578 | if (oldfunc) | |
1579 | { | |
1580 | /* If a common symbol overrides a function, make sure | |
1581 | that it isn't defined dynamically nor has type | |
1582 | function. */ | |
1583 | h->def_dynamic = 0; | |
1584 | h->type = STT_NOTYPE; | |
1585 | } | |
1586 | *type_change_ok = TRUE; | |
1587 | } | |
45d6a902 | 1588 | |
6c9b78e6 AM |
1589 | if (hi->root.type == bfd_link_hash_indirect) |
1590 | flip = hi; | |
45d6a902 AM |
1591 | else |
1592 | /* This union may have been set to be non-NULL when this symbol | |
1593 | was seen in a dynamic object. We must force the union to be | |
1594 | NULL, so that it is correct for a regular symbol. */ | |
1595 | h->verinfo.vertree = NULL; | |
1596 | } | |
1597 | ||
1598 | /* Handle the special case of a new common symbol merging with an | |
1599 | old symbol that looks like it might be a common symbol defined in | |
1600 | a shared object. Note that we have already handled the case in | |
1601 | which a new common symbol should simply override the definition | |
1602 | in the shared library. */ | |
1603 | ||
1604 | if (! newdyn | |
1605 | && bfd_is_com_section (sec) | |
1606 | && olddyncommon) | |
1607 | { | |
1608 | /* It would be best if we could set the hash table entry to a | |
1609 | common symbol, but we don't know what to use for the section | |
1610 | or the alignment. */ | |
1611 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1612 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 AM |
1613 | return FALSE; |
1614 | ||
4cc11e76 | 1615 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1616 | larger, pretend that the new symbol has its size. */ |
1617 | ||
1618 | if (h->size > *pvalue) | |
1619 | *pvalue = h->size; | |
1620 | ||
af44c138 L |
1621 | /* We need to remember the alignment required by the symbol |
1622 | in the dynamic object. */ | |
1623 | BFD_ASSERT (pold_alignment); | |
1624 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 AM |
1625 | |
1626 | olddef = FALSE; | |
1627 | olddyncommon = FALSE; | |
1628 | ||
1629 | h->root.type = bfd_link_hash_undefined; | |
1630 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1631 | ||
1632 | *size_change_ok = TRUE; | |
1633 | *type_change_ok = TRUE; | |
1634 | ||
6c9b78e6 AM |
1635 | if (hi->root.type == bfd_link_hash_indirect) |
1636 | flip = hi; | |
45d6a902 AM |
1637 | else |
1638 | h->verinfo.vertree = NULL; | |
1639 | } | |
1640 | ||
1641 | if (flip != NULL) | |
1642 | { | |
1643 | /* Handle the case where we had a versioned symbol in a dynamic | |
1644 | library and now find a definition in a normal object. In this | |
1645 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1646 | flip->root.type = h->root.type; |
00cbee0a | 1647 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1648 | h->root.type = bfd_link_hash_indirect; |
1649 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1650 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1651 | if (h->def_dynamic) |
45d6a902 | 1652 | { |
f5385ebf AM |
1653 | h->def_dynamic = 0; |
1654 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1655 | } |
1656 | } | |
1657 | ||
45d6a902 AM |
1658 | return TRUE; |
1659 | } | |
1660 | ||
1661 | /* This function is called to create an indirect symbol from the | |
1662 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1663 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1664 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1665 | |
28caa186 | 1666 | static bfd_boolean |
268b6b39 AM |
1667 | _bfd_elf_add_default_symbol (bfd *abfd, |
1668 | struct bfd_link_info *info, | |
1669 | struct elf_link_hash_entry *h, | |
1670 | const char *name, | |
1671 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1672 | asection *sec, |
1673 | bfd_vma value, | |
1674 | bfd **poldbfd, | |
e3c9d234 | 1675 | bfd_boolean *dynsym) |
45d6a902 AM |
1676 | { |
1677 | bfd_boolean type_change_ok; | |
1678 | bfd_boolean size_change_ok; | |
1679 | bfd_boolean skip; | |
1680 | char *shortname; | |
1681 | struct elf_link_hash_entry *hi; | |
1682 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1683 | const struct elf_backend_data *bed; |
45d6a902 AM |
1684 | bfd_boolean collect; |
1685 | bfd_boolean dynamic; | |
e3c9d234 | 1686 | bfd_boolean override; |
45d6a902 AM |
1687 | char *p; |
1688 | size_t len, shortlen; | |
ffd65175 | 1689 | asection *tmp_sec; |
6e33951e | 1690 | bfd_boolean matched; |
45d6a902 | 1691 | |
422f1182 L |
1692 | if (h->versioned == unversioned || h->versioned == versioned_hidden) |
1693 | return TRUE; | |
1694 | ||
45d6a902 AM |
1695 | /* If this symbol has a version, and it is the default version, we |
1696 | create an indirect symbol from the default name to the fully | |
1697 | decorated name. This will cause external references which do not | |
1698 | specify a version to be bound to this version of the symbol. */ | |
1699 | p = strchr (name, ELF_VER_CHR); | |
422f1182 L |
1700 | if (h->versioned == unknown) |
1701 | { | |
1702 | if (p == NULL) | |
1703 | { | |
1704 | h->versioned = unversioned; | |
1705 | return TRUE; | |
1706 | } | |
1707 | else | |
1708 | { | |
1709 | if (p[1] != ELF_VER_CHR) | |
1710 | { | |
1711 | h->versioned = versioned_hidden; | |
1712 | return TRUE; | |
1713 | } | |
1714 | else | |
1715 | h->versioned = versioned; | |
1716 | } | |
1717 | } | |
45d6a902 | 1718 | |
45d6a902 AM |
1719 | bed = get_elf_backend_data (abfd); |
1720 | collect = bed->collect; | |
1721 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1722 | ||
1723 | shortlen = p - name; | |
a50b1753 | 1724 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 AM |
1725 | if (shortname == NULL) |
1726 | return FALSE; | |
1727 | memcpy (shortname, name, shortlen); | |
1728 | shortname[shortlen] = '\0'; | |
1729 | ||
1730 | /* We are going to create a new symbol. Merge it with any existing | |
1731 | symbol with this name. For the purposes of the merge, act as | |
1732 | though we were defining the symbol we just defined, although we | |
1733 | actually going to define an indirect symbol. */ | |
1734 | type_change_ok = FALSE; | |
1735 | size_change_ok = FALSE; | |
6e33951e | 1736 | matched = TRUE; |
ffd65175 AM |
1737 | tmp_sec = sec; |
1738 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
4f3fedcf | 1739 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1740 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1741 | return FALSE; |
1742 | ||
1743 | if (skip) | |
1744 | goto nondefault; | |
1745 | ||
1746 | if (! override) | |
1747 | { | |
c6e8a9a8 | 1748 | /* Add the default symbol if not performing a relocatable link. */ |
0e1862bb | 1749 | if (! bfd_link_relocatable (info)) |
c6e8a9a8 L |
1750 | { |
1751 | bh = &hi->root; | |
1752 | if (! (_bfd_generic_link_add_one_symbol | |
1753 | (info, abfd, shortname, BSF_INDIRECT, | |
1754 | bfd_ind_section_ptr, | |
1755 | 0, name, FALSE, collect, &bh))) | |
1756 | return FALSE; | |
1757 | hi = (struct elf_link_hash_entry *) bh; | |
1758 | } | |
45d6a902 AM |
1759 | } |
1760 | else | |
1761 | { | |
1762 | /* In this case the symbol named SHORTNAME is overriding the | |
1763 | indirect symbol we want to add. We were planning on making | |
1764 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1765 | is the name without a version. NAME is the fully versioned | |
1766 | name, and it is the default version. | |
1767 | ||
1768 | Overriding means that we already saw a definition for the | |
1769 | symbol SHORTNAME in a regular object, and it is overriding | |
1770 | the symbol defined in the dynamic object. | |
1771 | ||
1772 | When this happens, we actually want to change NAME, the | |
1773 | symbol we just added, to refer to SHORTNAME. This will cause | |
1774 | references to NAME in the shared object to become references | |
1775 | to SHORTNAME in the regular object. This is what we expect | |
1776 | when we override a function in a shared object: that the | |
1777 | references in the shared object will be mapped to the | |
1778 | definition in the regular object. */ | |
1779 | ||
1780 | while (hi->root.type == bfd_link_hash_indirect | |
1781 | || hi->root.type == bfd_link_hash_warning) | |
1782 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1783 | ||
1784 | h->root.type = bfd_link_hash_indirect; | |
1785 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 1786 | if (h->def_dynamic) |
45d6a902 | 1787 | { |
f5385ebf AM |
1788 | h->def_dynamic = 0; |
1789 | hi->ref_dynamic = 1; | |
1790 | if (hi->ref_regular | |
1791 | || hi->def_regular) | |
45d6a902 | 1792 | { |
c152c796 | 1793 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
45d6a902 AM |
1794 | return FALSE; |
1795 | } | |
1796 | } | |
1797 | ||
1798 | /* Now set HI to H, so that the following code will set the | |
1799 | other fields correctly. */ | |
1800 | hi = h; | |
1801 | } | |
1802 | ||
fab4a87f L |
1803 | /* Check if HI is a warning symbol. */ |
1804 | if (hi->root.type == bfd_link_hash_warning) | |
1805 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1806 | ||
45d6a902 AM |
1807 | /* If there is a duplicate definition somewhere, then HI may not |
1808 | point to an indirect symbol. We will have reported an error to | |
1809 | the user in that case. */ | |
1810 | ||
1811 | if (hi->root.type == bfd_link_hash_indirect) | |
1812 | { | |
1813 | struct elf_link_hash_entry *ht; | |
1814 | ||
45d6a902 | 1815 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 1816 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 1817 | |
68c88cd4 AM |
1818 | /* A reference to the SHORTNAME symbol from a dynamic library |
1819 | will be satisfied by the versioned symbol at runtime. In | |
1820 | effect, we have a reference to the versioned symbol. */ | |
1821 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
1822 | hi->dynamic_def |= ht->dynamic_def; | |
1823 | ||
45d6a902 AM |
1824 | /* See if the new flags lead us to realize that the symbol must |
1825 | be dynamic. */ | |
1826 | if (! *dynsym) | |
1827 | { | |
1828 | if (! dynamic) | |
1829 | { | |
0e1862bb | 1830 | if (! bfd_link_executable (info) |
90c984fc | 1831 | || hi->def_dynamic |
f5385ebf | 1832 | || hi->ref_dynamic) |
45d6a902 AM |
1833 | *dynsym = TRUE; |
1834 | } | |
1835 | else | |
1836 | { | |
f5385ebf | 1837 | if (hi->ref_regular) |
45d6a902 AM |
1838 | *dynsym = TRUE; |
1839 | } | |
1840 | } | |
1841 | } | |
1842 | ||
1843 | /* We also need to define an indirection from the nondefault version | |
1844 | of the symbol. */ | |
1845 | ||
1846 | nondefault: | |
1847 | len = strlen (name); | |
a50b1753 | 1848 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 AM |
1849 | if (shortname == NULL) |
1850 | return FALSE; | |
1851 | memcpy (shortname, name, shortlen); | |
1852 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
1853 | ||
1854 | /* Once again, merge with any existing symbol. */ | |
1855 | type_change_ok = FALSE; | |
1856 | size_change_ok = FALSE; | |
ffd65175 AM |
1857 | tmp_sec = sec; |
1858 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
115c6d5c | 1859 | &hi, poldbfd, NULL, NULL, &skip, &override, |
6e33951e | 1860 | &type_change_ok, &size_change_ok, &matched)) |
45d6a902 AM |
1861 | return FALSE; |
1862 | ||
1863 | if (skip) | |
1864 | return TRUE; | |
1865 | ||
1866 | if (override) | |
1867 | { | |
1868 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
1869 | the type of override we do in the case above unless it is | |
4cc11e76 | 1870 | overridden by a versioned definition. */ |
45d6a902 AM |
1871 | if (hi->root.type != bfd_link_hash_defined |
1872 | && hi->root.type != bfd_link_hash_defweak) | |
1873 | (*_bfd_error_handler) | |
d003868e AM |
1874 | (_("%B: unexpected redefinition of indirect versioned symbol `%s'"), |
1875 | abfd, shortname); | |
45d6a902 AM |
1876 | } |
1877 | else | |
1878 | { | |
1879 | bh = &hi->root; | |
1880 | if (! (_bfd_generic_link_add_one_symbol | |
1881 | (info, abfd, shortname, BSF_INDIRECT, | |
268b6b39 | 1882 | bfd_ind_section_ptr, 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1883 | return FALSE; |
1884 | hi = (struct elf_link_hash_entry *) bh; | |
1885 | ||
1886 | /* If there is a duplicate definition somewhere, then HI may not | |
1887 | point to an indirect symbol. We will have reported an error | |
1888 | to the user in that case. */ | |
1889 | ||
1890 | if (hi->root.type == bfd_link_hash_indirect) | |
1891 | { | |
fcfa13d2 | 1892 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
68c88cd4 AM |
1893 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; |
1894 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 AM |
1895 | |
1896 | /* See if the new flags lead us to realize that the symbol | |
1897 | must be dynamic. */ | |
1898 | if (! *dynsym) | |
1899 | { | |
1900 | if (! dynamic) | |
1901 | { | |
0e1862bb | 1902 | if (! bfd_link_executable (info) |
f5385ebf | 1903 | || hi->ref_dynamic) |
45d6a902 AM |
1904 | *dynsym = TRUE; |
1905 | } | |
1906 | else | |
1907 | { | |
f5385ebf | 1908 | if (hi->ref_regular) |
45d6a902 AM |
1909 | *dynsym = TRUE; |
1910 | } | |
1911 | } | |
1912 | } | |
1913 | } | |
1914 | ||
1915 | return TRUE; | |
1916 | } | |
1917 | \f | |
1918 | /* This routine is used to export all defined symbols into the dynamic | |
1919 | symbol table. It is called via elf_link_hash_traverse. */ | |
1920 | ||
28caa186 | 1921 | static bfd_boolean |
268b6b39 | 1922 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 1923 | { |
a50b1753 | 1924 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
1925 | |
1926 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
1927 | if (h->root.type == bfd_link_hash_indirect) | |
1928 | return TRUE; | |
1929 | ||
7686d77d AM |
1930 | /* Ignore this if we won't export it. */ |
1931 | if (!eif->info->export_dynamic && !h->dynamic) | |
1932 | return TRUE; | |
45d6a902 AM |
1933 | |
1934 | if (h->dynindx == -1 | |
fd91d419 L |
1935 | && (h->def_regular || h->ref_regular) |
1936 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
1937 | h->root.root.string)) | |
45d6a902 | 1938 | { |
fd91d419 | 1939 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 1940 | { |
fd91d419 L |
1941 | eif->failed = TRUE; |
1942 | return FALSE; | |
45d6a902 AM |
1943 | } |
1944 | } | |
1945 | ||
1946 | return TRUE; | |
1947 | } | |
1948 | \f | |
1949 | /* Look through the symbols which are defined in other shared | |
1950 | libraries and referenced here. Update the list of version | |
1951 | dependencies. This will be put into the .gnu.version_r section. | |
1952 | This function is called via elf_link_hash_traverse. */ | |
1953 | ||
28caa186 | 1954 | static bfd_boolean |
268b6b39 AM |
1955 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
1956 | void *data) | |
45d6a902 | 1957 | { |
a50b1753 | 1958 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
1959 | Elf_Internal_Verneed *t; |
1960 | Elf_Internal_Vernaux *a; | |
1961 | bfd_size_type amt; | |
1962 | ||
45d6a902 AM |
1963 | /* We only care about symbols defined in shared objects with version |
1964 | information. */ | |
f5385ebf AM |
1965 | if (!h->def_dynamic |
1966 | || h->def_regular | |
45d6a902 | 1967 | || h->dynindx == -1 |
7b20f099 AM |
1968 | || h->verinfo.verdef == NULL |
1969 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
1970 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
45d6a902 AM |
1971 | return TRUE; |
1972 | ||
1973 | /* See if we already know about this version. */ | |
28caa186 AM |
1974 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
1975 | t != NULL; | |
1976 | t = t->vn_nextref) | |
45d6a902 AM |
1977 | { |
1978 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
1979 | continue; | |
1980 | ||
1981 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1982 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
1983 | return TRUE; | |
1984 | ||
1985 | break; | |
1986 | } | |
1987 | ||
1988 | /* This is a new version. Add it to tree we are building. */ | |
1989 | ||
1990 | if (t == NULL) | |
1991 | { | |
1992 | amt = sizeof *t; | |
a50b1753 | 1993 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
1994 | if (t == NULL) |
1995 | { | |
1996 | rinfo->failed = TRUE; | |
1997 | return FALSE; | |
1998 | } | |
1999 | ||
2000 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
2001 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
2002 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
2003 | } |
2004 | ||
2005 | amt = sizeof *a; | |
a50b1753 | 2006 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
2007 | if (a == NULL) |
2008 | { | |
2009 | rinfo->failed = TRUE; | |
2010 | return FALSE; | |
2011 | } | |
45d6a902 AM |
2012 | |
2013 | /* Note that we are copying a string pointer here, and testing it | |
2014 | above. If bfd_elf_string_from_elf_section is ever changed to | |
2015 | discard the string data when low in memory, this will have to be | |
2016 | fixed. */ | |
2017 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
2018 | ||
2019 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
2020 | a->vna_nextptr = t->vn_auxptr; | |
2021 | ||
2022 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
2023 | ++rinfo->vers; | |
2024 | ||
2025 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
2026 | ||
2027 | t->vn_auxptr = a; | |
2028 | ||
2029 | return TRUE; | |
2030 | } | |
2031 | ||
2032 | /* Figure out appropriate versions for all the symbols. We may not | |
2033 | have the version number script until we have read all of the input | |
2034 | files, so until that point we don't know which symbols should be | |
2035 | local. This function is called via elf_link_hash_traverse. */ | |
2036 | ||
28caa186 | 2037 | static bfd_boolean |
268b6b39 | 2038 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2039 | { |
28caa186 | 2040 | struct elf_info_failed *sinfo; |
45d6a902 | 2041 | struct bfd_link_info *info; |
9c5bfbb7 | 2042 | const struct elf_backend_data *bed; |
45d6a902 AM |
2043 | struct elf_info_failed eif; |
2044 | char *p; | |
2045 | bfd_size_type amt; | |
2046 | ||
a50b1753 | 2047 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
2048 | info = sinfo->info; |
2049 | ||
45d6a902 AM |
2050 | /* Fix the symbol flags. */ |
2051 | eif.failed = FALSE; | |
2052 | eif.info = info; | |
2053 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
2054 | { | |
2055 | if (eif.failed) | |
2056 | sinfo->failed = TRUE; | |
2057 | return FALSE; | |
2058 | } | |
2059 | ||
2060 | /* We only need version numbers for symbols defined in regular | |
2061 | objects. */ | |
f5385ebf | 2062 | if (!h->def_regular) |
45d6a902 AM |
2063 | return TRUE; |
2064 | ||
28caa186 | 2065 | bed = get_elf_backend_data (info->output_bfd); |
45d6a902 AM |
2066 | p = strchr (h->root.root.string, ELF_VER_CHR); |
2067 | if (p != NULL && h->verinfo.vertree == NULL) | |
2068 | { | |
2069 | struct bfd_elf_version_tree *t; | |
45d6a902 | 2070 | |
45d6a902 AM |
2071 | ++p; |
2072 | if (*p == ELF_VER_CHR) | |
6e33951e | 2073 | ++p; |
45d6a902 AM |
2074 | |
2075 | /* If there is no version string, we can just return out. */ | |
2076 | if (*p == '\0') | |
6e33951e | 2077 | return TRUE; |
45d6a902 AM |
2078 | |
2079 | /* Look for the version. If we find it, it is no longer weak. */ | |
fd91d419 | 2080 | for (t = sinfo->info->version_info; t != NULL; t = t->next) |
45d6a902 AM |
2081 | { |
2082 | if (strcmp (t->name, p) == 0) | |
2083 | { | |
2084 | size_t len; | |
2085 | char *alc; | |
2086 | struct bfd_elf_version_expr *d; | |
2087 | ||
2088 | len = p - h->root.root.string; | |
a50b1753 | 2089 | alc = (char *) bfd_malloc (len); |
45d6a902 | 2090 | if (alc == NULL) |
14b1c01e AM |
2091 | { |
2092 | sinfo->failed = TRUE; | |
2093 | return FALSE; | |
2094 | } | |
45d6a902 AM |
2095 | memcpy (alc, h->root.root.string, len - 1); |
2096 | alc[len - 1] = '\0'; | |
2097 | if (alc[len - 2] == ELF_VER_CHR) | |
2098 | alc[len - 2] = '\0'; | |
2099 | ||
2100 | h->verinfo.vertree = t; | |
2101 | t->used = TRUE; | |
2102 | d = NULL; | |
2103 | ||
108ba305 JJ |
2104 | if (t->globals.list != NULL) |
2105 | d = (*t->match) (&t->globals, NULL, alc); | |
45d6a902 AM |
2106 | |
2107 | /* See if there is anything to force this symbol to | |
2108 | local scope. */ | |
108ba305 | 2109 | if (d == NULL && t->locals.list != NULL) |
45d6a902 | 2110 | { |
108ba305 JJ |
2111 | d = (*t->match) (&t->locals, NULL, alc); |
2112 | if (d != NULL | |
2113 | && h->dynindx != -1 | |
108ba305 JJ |
2114 | && ! info->export_dynamic) |
2115 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2116 | } |
2117 | ||
2118 | free (alc); | |
2119 | break; | |
2120 | } | |
2121 | } | |
2122 | ||
2123 | /* If we are building an application, we need to create a | |
2124 | version node for this version. */ | |
0e1862bb | 2125 | if (t == NULL && bfd_link_executable (info)) |
45d6a902 AM |
2126 | { |
2127 | struct bfd_elf_version_tree **pp; | |
2128 | int version_index; | |
2129 | ||
2130 | /* If we aren't going to export this symbol, we don't need | |
2131 | to worry about it. */ | |
2132 | if (h->dynindx == -1) | |
2133 | return TRUE; | |
2134 | ||
2135 | amt = sizeof *t; | |
a50b1753 | 2136 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, amt); |
45d6a902 AM |
2137 | if (t == NULL) |
2138 | { | |
2139 | sinfo->failed = TRUE; | |
2140 | return FALSE; | |
2141 | } | |
2142 | ||
45d6a902 | 2143 | t->name = p; |
45d6a902 AM |
2144 | t->name_indx = (unsigned int) -1; |
2145 | t->used = TRUE; | |
2146 | ||
2147 | version_index = 1; | |
2148 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2149 | if (sinfo->info->version_info != NULL |
2150 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2151 | version_index = 0; |
fd91d419 L |
2152 | for (pp = &sinfo->info->version_info; |
2153 | *pp != NULL; | |
2154 | pp = &(*pp)->next) | |
45d6a902 AM |
2155 | ++version_index; |
2156 | t->vernum = version_index; | |
2157 | ||
2158 | *pp = t; | |
2159 | ||
2160 | h->verinfo.vertree = t; | |
2161 | } | |
2162 | else if (t == NULL) | |
2163 | { | |
2164 | /* We could not find the version for a symbol when | |
2165 | generating a shared archive. Return an error. */ | |
2166 | (*_bfd_error_handler) | |
c55fe096 | 2167 | (_("%B: version node not found for symbol %s"), |
28caa186 | 2168 | info->output_bfd, h->root.root.string); |
45d6a902 AM |
2169 | bfd_set_error (bfd_error_bad_value); |
2170 | sinfo->failed = TRUE; | |
2171 | return FALSE; | |
2172 | } | |
45d6a902 AM |
2173 | } |
2174 | ||
2175 | /* If we don't have a version for this symbol, see if we can find | |
2176 | something. */ | |
fd91d419 | 2177 | if (h->verinfo.vertree == NULL && sinfo->info->version_info != NULL) |
45d6a902 | 2178 | { |
1e8fa21e | 2179 | bfd_boolean hide; |
ae5a3597 | 2180 | |
fd91d419 L |
2181 | h->verinfo.vertree |
2182 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2183 | h->root.root.string, &hide); | |
1e8fa21e AM |
2184 | if (h->verinfo.vertree != NULL && hide) |
2185 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2186 | } |
2187 | ||
2188 | return TRUE; | |
2189 | } | |
2190 | \f | |
45d6a902 AM |
2191 | /* Read and swap the relocs from the section indicated by SHDR. This |
2192 | may be either a REL or a RELA section. The relocations are | |
2193 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2194 | which should have already been allocated to contain enough space. | |
2195 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2196 | relocations should be stored. | |
2197 | ||
2198 | Returns FALSE if something goes wrong. */ | |
2199 | ||
2200 | static bfd_boolean | |
268b6b39 | 2201 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2202 | asection *sec, |
268b6b39 AM |
2203 | Elf_Internal_Shdr *shdr, |
2204 | void *external_relocs, | |
2205 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2206 | { |
9c5bfbb7 | 2207 | const struct elf_backend_data *bed; |
268b6b39 | 2208 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2209 | const bfd_byte *erela; |
2210 | const bfd_byte *erelaend; | |
2211 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2212 | Elf_Internal_Shdr *symtab_hdr; |
2213 | size_t nsyms; | |
45d6a902 | 2214 | |
45d6a902 AM |
2215 | /* Position ourselves at the start of the section. */ |
2216 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2217 | return FALSE; | |
2218 | ||
2219 | /* Read the relocations. */ | |
2220 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
2221 | return FALSE; | |
2222 | ||
243ef1e0 | 2223 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2224 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2225 | |
45d6a902 AM |
2226 | bed = get_elf_backend_data (abfd); |
2227 | ||
2228 | /* Convert the external relocations to the internal format. */ | |
2229 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2230 | swap_in = bed->s->swap_reloc_in; | |
2231 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2232 | swap_in = bed->s->swap_reloca_in; | |
2233 | else | |
2234 | { | |
2235 | bfd_set_error (bfd_error_wrong_format); | |
2236 | return FALSE; | |
2237 | } | |
2238 | ||
a50b1753 | 2239 | erela = (const bfd_byte *) external_relocs; |
51992aec | 2240 | erelaend = erela + shdr->sh_size; |
45d6a902 AM |
2241 | irela = internal_relocs; |
2242 | while (erela < erelaend) | |
2243 | { | |
243ef1e0 L |
2244 | bfd_vma r_symndx; |
2245 | ||
45d6a902 | 2246 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2247 | r_symndx = ELF32_R_SYM (irela->r_info); |
2248 | if (bed->s->arch_size == 64) | |
2249 | r_symndx >>= 24; | |
ce98a316 NC |
2250 | if (nsyms > 0) |
2251 | { | |
2252 | if ((size_t) r_symndx >= nsyms) | |
2253 | { | |
2254 | (*_bfd_error_handler) | |
2255 | (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)" | |
2256 | " for offset 0x%lx in section `%A'"), | |
2257 | abfd, sec, | |
2258 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
2259 | bfd_set_error (bfd_error_bad_value); | |
2260 | return FALSE; | |
2261 | } | |
2262 | } | |
cf35638d | 2263 | else if (r_symndx != STN_UNDEF) |
243ef1e0 L |
2264 | { |
2265 | (*_bfd_error_handler) | |
ce98a316 NC |
2266 | (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'" |
2267 | " when the object file has no symbol table"), | |
d003868e AM |
2268 | abfd, sec, |
2269 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
243ef1e0 L |
2270 | bfd_set_error (bfd_error_bad_value); |
2271 | return FALSE; | |
2272 | } | |
45d6a902 AM |
2273 | irela += bed->s->int_rels_per_ext_rel; |
2274 | erela += shdr->sh_entsize; | |
2275 | } | |
2276 | ||
2277 | return TRUE; | |
2278 | } | |
2279 | ||
2280 | /* Read and swap the relocs for a section O. They may have been | |
2281 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2282 | not NULL, they are used as buffers to read into. They are known to | |
2283 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2284 | the return value is allocated using either malloc or bfd_alloc, | |
2285 | according to the KEEP_MEMORY argument. If O has two relocation | |
2286 | sections (both REL and RELA relocations), then the REL_HDR | |
2287 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2288 | RELA_HDR relocations. */ |
45d6a902 AM |
2289 | |
2290 | Elf_Internal_Rela * | |
268b6b39 AM |
2291 | _bfd_elf_link_read_relocs (bfd *abfd, |
2292 | asection *o, | |
2293 | void *external_relocs, | |
2294 | Elf_Internal_Rela *internal_relocs, | |
2295 | bfd_boolean keep_memory) | |
45d6a902 | 2296 | { |
268b6b39 | 2297 | void *alloc1 = NULL; |
45d6a902 | 2298 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2299 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2300 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2301 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2302 | |
d4730f92 BS |
2303 | if (esdo->relocs != NULL) |
2304 | return esdo->relocs; | |
45d6a902 AM |
2305 | |
2306 | if (o->reloc_count == 0) | |
2307 | return NULL; | |
2308 | ||
45d6a902 AM |
2309 | if (internal_relocs == NULL) |
2310 | { | |
2311 | bfd_size_type size; | |
2312 | ||
2313 | size = o->reloc_count; | |
2314 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
2315 | if (keep_memory) | |
a50b1753 | 2316 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2317 | else |
a50b1753 | 2318 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2319 | if (internal_relocs == NULL) |
2320 | goto error_return; | |
2321 | } | |
2322 | ||
2323 | if (external_relocs == NULL) | |
2324 | { | |
d4730f92 BS |
2325 | bfd_size_type size = 0; |
2326 | ||
2327 | if (esdo->rel.hdr) | |
2328 | size += esdo->rel.hdr->sh_size; | |
2329 | if (esdo->rela.hdr) | |
2330 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2331 | |
268b6b39 | 2332 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2333 | if (alloc1 == NULL) |
2334 | goto error_return; | |
2335 | external_relocs = alloc1; | |
2336 | } | |
2337 | ||
d4730f92 BS |
2338 | internal_rela_relocs = internal_relocs; |
2339 | if (esdo->rel.hdr) | |
2340 | { | |
2341 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2342 | external_relocs, | |
2343 | internal_relocs)) | |
2344 | goto error_return; | |
2345 | external_relocs = (((bfd_byte *) external_relocs) | |
2346 | + esdo->rel.hdr->sh_size); | |
2347 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2348 | * bed->s->int_rels_per_ext_rel); | |
2349 | } | |
2350 | ||
2351 | if (esdo->rela.hdr | |
2352 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2353 | external_relocs, | |
2354 | internal_rela_relocs))) | |
45d6a902 AM |
2355 | goto error_return; |
2356 | ||
2357 | /* Cache the results for next time, if we can. */ | |
2358 | if (keep_memory) | |
d4730f92 | 2359 | esdo->relocs = internal_relocs; |
45d6a902 AM |
2360 | |
2361 | if (alloc1 != NULL) | |
2362 | free (alloc1); | |
2363 | ||
2364 | /* Don't free alloc2, since if it was allocated we are passing it | |
2365 | back (under the name of internal_relocs). */ | |
2366 | ||
2367 | return internal_relocs; | |
2368 | ||
2369 | error_return: | |
2370 | if (alloc1 != NULL) | |
2371 | free (alloc1); | |
2372 | if (alloc2 != NULL) | |
4dd07732 AM |
2373 | { |
2374 | if (keep_memory) | |
2375 | bfd_release (abfd, alloc2); | |
2376 | else | |
2377 | free (alloc2); | |
2378 | } | |
45d6a902 AM |
2379 | return NULL; |
2380 | } | |
2381 | ||
2382 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2383 | section header for a section containing relocations for O. */ | |
2384 | ||
28caa186 | 2385 | static bfd_boolean |
268b6b39 | 2386 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
d4730f92 | 2387 | struct bfd_elf_section_reloc_data *reldata) |
45d6a902 | 2388 | { |
d4730f92 | 2389 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2390 | |
2391 | /* That allows us to calculate the size of the section. */ | |
d4730f92 | 2392 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2393 | |
2394 | /* The contents field must last into write_object_contents, so we | |
2395 | allocate it with bfd_alloc rather than malloc. Also since we | |
2396 | cannot be sure that the contents will actually be filled in, | |
2397 | we zero the allocated space. */ | |
a50b1753 | 2398 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 AM |
2399 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
2400 | return FALSE; | |
2401 | ||
d4730f92 | 2402 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2403 | { |
2404 | struct elf_link_hash_entry **p; | |
2405 | ||
ca4be51c AM |
2406 | p = ((struct elf_link_hash_entry **) |
2407 | bfd_zmalloc (reldata->count * sizeof (*p))); | |
45d6a902 AM |
2408 | if (p == NULL) |
2409 | return FALSE; | |
2410 | ||
d4730f92 | 2411 | reldata->hashes = p; |
45d6a902 AM |
2412 | } |
2413 | ||
2414 | return TRUE; | |
2415 | } | |
2416 | ||
2417 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2418 | originated from the section given by INPUT_REL_HDR) to the | |
2419 | OUTPUT_BFD. */ | |
2420 | ||
2421 | bfd_boolean | |
268b6b39 AM |
2422 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2423 | asection *input_section, | |
2424 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2425 | Elf_Internal_Rela *internal_relocs, |
2426 | struct elf_link_hash_entry **rel_hash | |
2427 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2428 | { |
2429 | Elf_Internal_Rela *irela; | |
2430 | Elf_Internal_Rela *irelaend; | |
2431 | bfd_byte *erel; | |
d4730f92 | 2432 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2433 | asection *output_section; |
9c5bfbb7 | 2434 | const struct elf_backend_data *bed; |
268b6b39 | 2435 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2436 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2437 | |
2438 | output_section = input_section->output_section; | |
45d6a902 | 2439 | |
d4730f92 BS |
2440 | bed = get_elf_backend_data (output_bfd); |
2441 | esdo = elf_section_data (output_section); | |
2442 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2443 | { |
d4730f92 BS |
2444 | output_reldata = &esdo->rel; |
2445 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2446 | } |
d4730f92 BS |
2447 | else if (esdo->rela.hdr |
2448 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2449 | { |
d4730f92 BS |
2450 | output_reldata = &esdo->rela; |
2451 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2452 | } |
2453 | else | |
2454 | { | |
2455 | (*_bfd_error_handler) | |
d003868e AM |
2456 | (_("%B: relocation size mismatch in %B section %A"), |
2457 | output_bfd, input_section->owner, input_section); | |
297d8443 | 2458 | bfd_set_error (bfd_error_wrong_format); |
45d6a902 AM |
2459 | return FALSE; |
2460 | } | |
2461 | ||
d4730f92 BS |
2462 | erel = output_reldata->hdr->contents; |
2463 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2464 | irela = internal_relocs; |
2465 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2466 | * bed->s->int_rels_per_ext_rel); | |
2467 | while (irela < irelaend) | |
2468 | { | |
2469 | (*swap_out) (output_bfd, irela, erel); | |
2470 | irela += bed->s->int_rels_per_ext_rel; | |
2471 | erel += input_rel_hdr->sh_entsize; | |
2472 | } | |
2473 | ||
2474 | /* Bump the counter, so that we know where to add the next set of | |
2475 | relocations. */ | |
d4730f92 | 2476 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 AM |
2477 | |
2478 | return TRUE; | |
2479 | } | |
2480 | \f | |
508c3946 L |
2481 | /* Make weak undefined symbols in PIE dynamic. */ |
2482 | ||
2483 | bfd_boolean | |
2484 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, | |
2485 | struct elf_link_hash_entry *h) | |
2486 | { | |
0e1862bb | 2487 | if (bfd_link_pie (info) |
508c3946 L |
2488 | && h->dynindx == -1 |
2489 | && h->root.type == bfd_link_hash_undefweak) | |
2490 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2491 | ||
2492 | return TRUE; | |
2493 | } | |
2494 | ||
45d6a902 AM |
2495 | /* Fix up the flags for a symbol. This handles various cases which |
2496 | can only be fixed after all the input files are seen. This is | |
2497 | currently called by both adjust_dynamic_symbol and | |
2498 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2499 | the face of future changes. */ | |
2500 | ||
28caa186 | 2501 | static bfd_boolean |
268b6b39 AM |
2502 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2503 | struct elf_info_failed *eif) | |
45d6a902 | 2504 | { |
33774f08 | 2505 | const struct elf_backend_data *bed; |
508c3946 | 2506 | |
45d6a902 AM |
2507 | /* If this symbol was mentioned in a non-ELF file, try to set |
2508 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2509 | permit a non-ELF file to correctly refer to a symbol defined in | |
2510 | an ELF dynamic object. */ | |
f5385ebf | 2511 | if (h->non_elf) |
45d6a902 AM |
2512 | { |
2513 | while (h->root.type == bfd_link_hash_indirect) | |
2514 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2515 | ||
2516 | if (h->root.type != bfd_link_hash_defined | |
2517 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2518 | { |
2519 | h->ref_regular = 1; | |
2520 | h->ref_regular_nonweak = 1; | |
2521 | } | |
45d6a902 AM |
2522 | else |
2523 | { | |
2524 | if (h->root.u.def.section->owner != NULL | |
2525 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2526 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2527 | { |
2528 | h->ref_regular = 1; | |
2529 | h->ref_regular_nonweak = 1; | |
2530 | } | |
45d6a902 | 2531 | else |
f5385ebf | 2532 | h->def_regular = 1; |
45d6a902 AM |
2533 | } |
2534 | ||
2535 | if (h->dynindx == -1 | |
f5385ebf AM |
2536 | && (h->def_dynamic |
2537 | || h->ref_dynamic)) | |
45d6a902 | 2538 | { |
c152c796 | 2539 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
2540 | { |
2541 | eif->failed = TRUE; | |
2542 | return FALSE; | |
2543 | } | |
2544 | } | |
2545 | } | |
2546 | else | |
2547 | { | |
f5385ebf | 2548 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2549 | was first seen in a non-ELF file. Fortunately, if the symbol |
2550 | was first seen in an ELF file, we're probably OK unless the | |
2551 | symbol was defined in a non-ELF file. Catch that case here. | |
2552 | FIXME: We're still in trouble if the symbol was first seen in | |
2553 | a dynamic object, and then later in a non-ELF regular object. */ | |
2554 | if ((h->root.type == bfd_link_hash_defined | |
2555 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2556 | && !h->def_regular |
45d6a902 AM |
2557 | && (h->root.u.def.section->owner != NULL |
2558 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2559 | != bfd_target_elf_flavour) | |
2560 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2561 | && !h->def_dynamic))) |
2562 | h->def_regular = 1; | |
45d6a902 AM |
2563 | } |
2564 | ||
508c3946 | 2565 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2566 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2567 | if (bed->elf_backend_fixup_symbol | |
2568 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
2569 | return FALSE; | |
508c3946 | 2570 | |
45d6a902 AM |
2571 | /* If this is a final link, and the symbol was defined as a common |
2572 | symbol in a regular object file, and there was no definition in | |
2573 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2574 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2575 | flag will not have been set. */ |
2576 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2577 | && !h->def_regular |
2578 | && h->ref_regular | |
2579 | && !h->def_dynamic | |
96f29d96 | 2580 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2581 | h->def_regular = 1; |
45d6a902 AM |
2582 | |
2583 | /* If -Bsymbolic was used (which means to bind references to global | |
2584 | symbols to the definition within the shared object), and this | |
2585 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2586 | need a PLT entry. Likewise, if the symbol has non-default |
2587 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2588 | will force it local. */ |
f5385ebf | 2589 | if (h->needs_plt |
0e1862bb | 2590 | && bfd_link_pic (eif->info) |
0eddce27 | 2591 | && is_elf_hash_table (eif->info->hash) |
55255dae | 2592 | && (SYMBOLIC_BIND (eif->info, h) |
c1be741f | 2593 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
f5385ebf | 2594 | && h->def_regular) |
45d6a902 | 2595 | { |
45d6a902 AM |
2596 | bfd_boolean force_local; |
2597 | ||
45d6a902 AM |
2598 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2599 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2600 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2601 | } | |
2602 | ||
2603 | /* If a weak undefined symbol has non-default visibility, we also | |
2604 | hide it from the dynamic linker. */ | |
9c7a29a3 | 2605 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 | 2606 | && h->root.type == bfd_link_hash_undefweak) |
33774f08 | 2607 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); |
45d6a902 AM |
2608 | |
2609 | /* If this is a weak defined symbol in a dynamic object, and we know | |
2610 | the real definition in the dynamic object, copy interesting flags | |
2611 | over to the real definition. */ | |
f6e332e6 | 2612 | if (h->u.weakdef != NULL) |
45d6a902 | 2613 | { |
45d6a902 AM |
2614 | /* If the real definition is defined by a regular object file, |
2615 | don't do anything special. See the longer description in | |
2616 | _bfd_elf_adjust_dynamic_symbol, below. */ | |
4e6b54a6 | 2617 | if (h->u.weakdef->def_regular) |
f6e332e6 | 2618 | h->u.weakdef = NULL; |
45d6a902 | 2619 | else |
a26587ba | 2620 | { |
4e6b54a6 AM |
2621 | struct elf_link_hash_entry *weakdef = h->u.weakdef; |
2622 | ||
2623 | while (h->root.type == bfd_link_hash_indirect) | |
2624 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2625 | ||
2626 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2627 | || h->root.type == bfd_link_hash_defweak); | |
2628 | BFD_ASSERT (weakdef->def_dynamic); | |
a26587ba RS |
2629 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
2630 | || weakdef->root.type == bfd_link_hash_defweak); | |
2631 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, weakdef, h); | |
2632 | } | |
45d6a902 AM |
2633 | } |
2634 | ||
2635 | return TRUE; | |
2636 | } | |
2637 | ||
2638 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2639 | called via elf_link_hash_traverse, and also calls itself | |
2640 | recursively. */ | |
2641 | ||
28caa186 | 2642 | static bfd_boolean |
268b6b39 | 2643 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2644 | { |
a50b1753 | 2645 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 | 2646 | bfd *dynobj; |
9c5bfbb7 | 2647 | const struct elf_backend_data *bed; |
45d6a902 | 2648 | |
0eddce27 | 2649 | if (! is_elf_hash_table (eif->info->hash)) |
45d6a902 AM |
2650 | return FALSE; |
2651 | ||
45d6a902 AM |
2652 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2653 | if (h->root.type == bfd_link_hash_indirect) | |
2654 | return TRUE; | |
2655 | ||
2656 | /* Fix the symbol flags. */ | |
2657 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
2658 | return FALSE; | |
2659 | ||
2660 | /* If this symbol does not require a PLT entry, and it is not | |
2661 | defined by a dynamic object, or is not referenced by a regular | |
2662 | object, ignore it. We do have to handle a weak defined symbol, | |
2663 | even if no regular object refers to it, if we decided to add it | |
2664 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2665 | about symbols which are defined by one dynamic object and | |
2666 | referenced by another one? */ | |
f5385ebf | 2667 | if (!h->needs_plt |
91e21fb7 | 2668 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
2669 | && (h->def_regular |
2670 | || !h->def_dynamic | |
2671 | || (!h->ref_regular | |
f6e332e6 | 2672 | && (h->u.weakdef == NULL || h->u.weakdef->dynindx == -1)))) |
45d6a902 | 2673 | { |
a6aa5195 | 2674 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
45d6a902 AM |
2675 | return TRUE; |
2676 | } | |
2677 | ||
2678 | /* If we've already adjusted this symbol, don't do it again. This | |
2679 | can happen via a recursive call. */ | |
f5385ebf | 2680 | if (h->dynamic_adjusted) |
45d6a902 AM |
2681 | return TRUE; |
2682 | ||
2683 | /* Don't look at this symbol again. Note that we must set this | |
2684 | after checking the above conditions, because we may look at a | |
2685 | symbol once, decide not to do anything, and then get called | |
2686 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 2687 | h->dynamic_adjusted = 1; |
45d6a902 AM |
2688 | |
2689 | /* If this is a weak definition, and we know a real definition, and | |
2690 | the real symbol is not itself defined by a regular object file, | |
2691 | then get a good value for the real definition. We handle the | |
2692 | real symbol first, for the convenience of the backend routine. | |
2693 | ||
2694 | Note that there is a confusing case here. If the real definition | |
2695 | is defined by a regular object file, we don't get the real symbol | |
2696 | from the dynamic object, but we do get the weak symbol. If the | |
2697 | processor backend uses a COPY reloc, then if some routine in the | |
2698 | dynamic object changes the real symbol, we will not see that | |
2699 | change in the corresponding weak symbol. This is the way other | |
2700 | ELF linkers work as well, and seems to be a result of the shared | |
2701 | library model. | |
2702 | ||
2703 | I will clarify this issue. Most SVR4 shared libraries define the | |
2704 | variable _timezone and define timezone as a weak synonym. The | |
2705 | tzset call changes _timezone. If you write | |
2706 | extern int timezone; | |
2707 | int _timezone = 5; | |
2708 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2709 | you might expect that, since timezone is a synonym for _timezone, | |
2710 | the same number will print both times. However, if the processor | |
2711 | backend uses a COPY reloc, then actually timezone will be copied | |
2712 | into your process image, and, since you define _timezone | |
2713 | yourself, _timezone will not. Thus timezone and _timezone will | |
2714 | wind up at different memory locations. The tzset call will set | |
2715 | _timezone, leaving timezone unchanged. */ | |
2716 | ||
f6e332e6 | 2717 | if (h->u.weakdef != NULL) |
45d6a902 | 2718 | { |
ec24dc88 AM |
2719 | /* If we get to this point, there is an implicit reference to |
2720 | H->U.WEAKDEF by a regular object file via the weak symbol H. */ | |
f6e332e6 | 2721 | h->u.weakdef->ref_regular = 1; |
45d6a902 | 2722 | |
ec24dc88 AM |
2723 | /* Ensure that the backend adjust_dynamic_symbol function sees |
2724 | H->U.WEAKDEF before H by recursively calling ourselves. */ | |
f6e332e6 | 2725 | if (! _bfd_elf_adjust_dynamic_symbol (h->u.weakdef, eif)) |
45d6a902 AM |
2726 | return FALSE; |
2727 | } | |
2728 | ||
2729 | /* If a symbol has no type and no size and does not require a PLT | |
2730 | entry, then we are probably about to do the wrong thing here: we | |
2731 | are probably going to create a COPY reloc for an empty object. | |
2732 | This case can arise when a shared object is built with assembly | |
2733 | code, and the assembly code fails to set the symbol type. */ | |
2734 | if (h->size == 0 | |
2735 | && h->type == STT_NOTYPE | |
f5385ebf | 2736 | && !h->needs_plt) |
45d6a902 AM |
2737 | (*_bfd_error_handler) |
2738 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
2739 | h->root.root.string); | |
2740 | ||
2741 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2742 | bed = get_elf_backend_data (dynobj); | |
e7c33416 | 2743 | |
45d6a902 AM |
2744 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
2745 | { | |
2746 | eif->failed = TRUE; | |
2747 | return FALSE; | |
2748 | } | |
2749 | ||
2750 | return TRUE; | |
2751 | } | |
2752 | ||
027297b7 L |
2753 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
2754 | DYNBSS. */ | |
2755 | ||
2756 | bfd_boolean | |
6cabe1ea AM |
2757 | _bfd_elf_adjust_dynamic_copy (struct bfd_link_info *info, |
2758 | struct elf_link_hash_entry *h, | |
027297b7 L |
2759 | asection *dynbss) |
2760 | { | |
91ac5911 | 2761 | unsigned int power_of_two; |
027297b7 L |
2762 | bfd_vma mask; |
2763 | asection *sec = h->root.u.def.section; | |
2764 | ||
2765 | /* The section aligment of definition is the maximum alignment | |
91ac5911 L |
2766 | requirement of symbols defined in the section. Since we don't |
2767 | know the symbol alignment requirement, we start with the | |
2768 | maximum alignment and check low bits of the symbol address | |
2769 | for the minimum alignment. */ | |
2770 | power_of_two = bfd_get_section_alignment (sec->owner, sec); | |
2771 | mask = ((bfd_vma) 1 << power_of_two) - 1; | |
2772 | while ((h->root.u.def.value & mask) != 0) | |
2773 | { | |
2774 | mask >>= 1; | |
2775 | --power_of_two; | |
2776 | } | |
027297b7 | 2777 | |
91ac5911 L |
2778 | if (power_of_two > bfd_get_section_alignment (dynbss->owner, |
2779 | dynbss)) | |
027297b7 L |
2780 | { |
2781 | /* Adjust the section alignment if needed. */ | |
2782 | if (! bfd_set_section_alignment (dynbss->owner, dynbss, | |
91ac5911 | 2783 | power_of_two)) |
027297b7 L |
2784 | return FALSE; |
2785 | } | |
2786 | ||
91ac5911 | 2787 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
2788 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
2789 | ||
2790 | /* Define the symbol as being at this point in DYNBSS. */ | |
2791 | h->root.u.def.section = dynbss; | |
2792 | h->root.u.def.value = dynbss->size; | |
2793 | ||
2794 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
2795 | dynbss->size += h->size; | |
2796 | ||
f7483970 L |
2797 | /* No error if extern_protected_data is true. */ |
2798 | if (h->protected_def | |
889c2a67 L |
2799 | && (!info->extern_protected_data |
2800 | || (info->extern_protected_data < 0 | |
2801 | && !get_elf_backend_data (dynbss->owner)->extern_protected_data))) | |
d07a1b05 AM |
2802 | info->callbacks->einfo |
2803 | (_("%P: copy reloc against protected `%T' is dangerous\n"), | |
2804 | h->root.root.string); | |
6cabe1ea | 2805 | |
027297b7 L |
2806 | return TRUE; |
2807 | } | |
2808 | ||
45d6a902 AM |
2809 | /* Adjust all external symbols pointing into SEC_MERGE sections |
2810 | to reflect the object merging within the sections. */ | |
2811 | ||
28caa186 | 2812 | static bfd_boolean |
268b6b39 | 2813 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
2814 | { |
2815 | asection *sec; | |
2816 | ||
45d6a902 AM |
2817 | if ((h->root.type == bfd_link_hash_defined |
2818 | || h->root.type == bfd_link_hash_defweak) | |
2819 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 2820 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 2821 | { |
a50b1753 | 2822 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
2823 | |
2824 | h->root.u.def.value = | |
2825 | _bfd_merged_section_offset (output_bfd, | |
2826 | &h->root.u.def.section, | |
2827 | elf_section_data (sec)->sec_info, | |
753731ee | 2828 | h->root.u.def.value); |
45d6a902 AM |
2829 | } |
2830 | ||
2831 | return TRUE; | |
2832 | } | |
986a241f RH |
2833 | |
2834 | /* Returns false if the symbol referred to by H should be considered | |
2835 | to resolve local to the current module, and true if it should be | |
2836 | considered to bind dynamically. */ | |
2837 | ||
2838 | bfd_boolean | |
268b6b39 AM |
2839 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
2840 | struct bfd_link_info *info, | |
89a2ee5a | 2841 | bfd_boolean not_local_protected) |
986a241f RH |
2842 | { |
2843 | bfd_boolean binding_stays_local_p; | |
fcb93ecf PB |
2844 | const struct elf_backend_data *bed; |
2845 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
2846 | |
2847 | if (h == NULL) | |
2848 | return FALSE; | |
2849 | ||
2850 | while (h->root.type == bfd_link_hash_indirect | |
2851 | || h->root.type == bfd_link_hash_warning) | |
2852 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2853 | ||
2854 | /* If it was forced local, then clearly it's not dynamic. */ | |
2855 | if (h->dynindx == -1) | |
2856 | return FALSE; | |
f5385ebf | 2857 | if (h->forced_local) |
986a241f RH |
2858 | return FALSE; |
2859 | ||
2860 | /* Identify the cases where name binding rules say that a | |
2861 | visible symbol resolves locally. */ | |
0e1862bb L |
2862 | binding_stays_local_p = (bfd_link_executable (info) |
2863 | || SYMBOLIC_BIND (info, h)); | |
986a241f RH |
2864 | |
2865 | switch (ELF_ST_VISIBILITY (h->other)) | |
2866 | { | |
2867 | case STV_INTERNAL: | |
2868 | case STV_HIDDEN: | |
2869 | return FALSE; | |
2870 | ||
2871 | case STV_PROTECTED: | |
fcb93ecf PB |
2872 | hash_table = elf_hash_table (info); |
2873 | if (!is_elf_hash_table (hash_table)) | |
2874 | return FALSE; | |
2875 | ||
2876 | bed = get_elf_backend_data (hash_table->dynobj); | |
2877 | ||
986a241f RH |
2878 | /* Proper resolution for function pointer equality may require |
2879 | that these symbols perhaps be resolved dynamically, even though | |
2880 | we should be resolving them to the current module. */ | |
89a2ee5a | 2881 | if (!not_local_protected || !bed->is_function_type (h->type)) |
986a241f RH |
2882 | binding_stays_local_p = TRUE; |
2883 | break; | |
2884 | ||
2885 | default: | |
986a241f RH |
2886 | break; |
2887 | } | |
2888 | ||
aa37626c | 2889 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 2890 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
aa37626c L |
2891 | return TRUE; |
2892 | ||
986a241f RH |
2893 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
2894 | us that it remains local. */ | |
2895 | return !binding_stays_local_p; | |
2896 | } | |
f6c52c13 AM |
2897 | |
2898 | /* Return true if the symbol referred to by H should be considered | |
2899 | to resolve local to the current module, and false otherwise. Differs | |
2900 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 2901 | undefined symbols. The two functions are virtually identical except |
89a2ee5a AM |
2902 | for the place where forced_local and dynindx == -1 are tested. If |
2903 | either of those tests are true, _bfd_elf_dynamic_symbol_p will say | |
2904 | the symbol is local, while _bfd_elf_symbol_refs_local_p will say | |
2905 | the symbol is local only for defined symbols. | |
2906 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as | |
2907 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
2908 | treatment of undefined weak symbols. For those that do not make | |
2909 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 AM |
2910 | |
2911 | bfd_boolean | |
268b6b39 AM |
2912 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
2913 | struct bfd_link_info *info, | |
2914 | bfd_boolean local_protected) | |
f6c52c13 | 2915 | { |
fcb93ecf PB |
2916 | const struct elf_backend_data *bed; |
2917 | struct elf_link_hash_table *hash_table; | |
2918 | ||
f6c52c13 AM |
2919 | /* If it's a local sym, of course we resolve locally. */ |
2920 | if (h == NULL) | |
2921 | return TRUE; | |
2922 | ||
d95edcac L |
2923 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
2924 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
2925 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
2926 | return TRUE; | |
2927 | ||
7e2294f9 AO |
2928 | /* Common symbols that become definitions don't get the DEF_REGULAR |
2929 | flag set, so test it first, and don't bail out. */ | |
2930 | if (ELF_COMMON_DEF_P (h)) | |
2931 | /* Do nothing. */; | |
f6c52c13 | 2932 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
2933 | resolve locally. The sym is either undefined or dynamic. */ |
2934 | else if (!h->def_regular) | |
f6c52c13 AM |
2935 | return FALSE; |
2936 | ||
2937 | /* Forced local symbols resolve locally. */ | |
f5385ebf | 2938 | if (h->forced_local) |
f6c52c13 AM |
2939 | return TRUE; |
2940 | ||
2941 | /* As do non-dynamic symbols. */ | |
2942 | if (h->dynindx == -1) | |
2943 | return TRUE; | |
2944 | ||
2945 | /* At this point, we know the symbol is defined and dynamic. In an | |
2946 | executable it must resolve locally, likewise when building symbolic | |
2947 | shared libraries. */ | |
0e1862bb | 2948 | if (bfd_link_executable (info) || SYMBOLIC_BIND (info, h)) |
f6c52c13 AM |
2949 | return TRUE; |
2950 | ||
2951 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
2952 | with default visibility might not resolve locally. */ | |
2953 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2954 | return FALSE; | |
2955 | ||
fcb93ecf PB |
2956 | hash_table = elf_hash_table (info); |
2957 | if (!is_elf_hash_table (hash_table)) | |
2958 | return TRUE; | |
2959 | ||
2960 | bed = get_elf_backend_data (hash_table->dynobj); | |
2961 | ||
f7483970 L |
2962 | /* If extern_protected_data is false, STV_PROTECTED non-function |
2963 | symbols are local. */ | |
889c2a67 L |
2964 | if ((!info->extern_protected_data |
2965 | || (info->extern_protected_data < 0 | |
2966 | && !bed->extern_protected_data)) | |
2967 | && !bed->is_function_type (h->type)) | |
1c16dfa5 L |
2968 | return TRUE; |
2969 | ||
f6c52c13 | 2970 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
2971 | symbols be treated as dynamic symbols. If the address of a |
2972 | function not defined in an executable is set to that function's | |
2973 | plt entry in the executable, then the address of the function in | |
2974 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
2975 | return local_protected; |
2976 | } | |
e1918d23 AM |
2977 | |
2978 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
2979 | aligned. Returns the first TLS output section. */ | |
2980 | ||
2981 | struct bfd_section * | |
2982 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
2983 | { | |
2984 | struct bfd_section *sec, *tls; | |
2985 | unsigned int align = 0; | |
2986 | ||
2987 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
2988 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
2989 | break; | |
2990 | tls = sec; | |
2991 | ||
2992 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
2993 | if (sec->alignment_power > align) | |
2994 | align = sec->alignment_power; | |
2995 | ||
2996 | elf_hash_table (info)->tls_sec = tls; | |
2997 | ||
2998 | /* Ensure the alignment of the first section is the largest alignment, | |
2999 | so that the tls segment starts aligned. */ | |
3000 | if (tls != NULL) | |
3001 | tls->alignment_power = align; | |
3002 | ||
3003 | return tls; | |
3004 | } | |
0ad989f9 L |
3005 | |
3006 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
3007 | static bfd_boolean | |
3008 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, | |
3009 | Elf_Internal_Sym *sym) | |
3010 | { | |
a4d8e49b L |
3011 | const struct elf_backend_data *bed; |
3012 | ||
0ad989f9 L |
3013 | /* Local symbols do not count, but target specific ones might. */ |
3014 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
3015 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
3016 | return FALSE; | |
3017 | ||
fcb93ecf | 3018 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 3019 | /* Function symbols do not count. */ |
fcb93ecf | 3020 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0ad989f9 L |
3021 | return FALSE; |
3022 | ||
3023 | /* If the section is undefined, then so is the symbol. */ | |
3024 | if (sym->st_shndx == SHN_UNDEF) | |
3025 | return FALSE; | |
3026 | ||
3027 | /* If the symbol is defined in the common section, then | |
3028 | it is a common definition and so does not count. */ | |
a4d8e49b | 3029 | if (bed->common_definition (sym)) |
0ad989f9 L |
3030 | return FALSE; |
3031 | ||
3032 | /* If the symbol is in a target specific section then we | |
3033 | must rely upon the backend to tell us what it is. */ | |
3034 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
3035 | /* FIXME - this function is not coded yet: | |
3036 | ||
3037 | return _bfd_is_global_symbol_definition (abfd, sym); | |
3038 | ||
3039 | Instead for now assume that the definition is not global, | |
3040 | Even if this is wrong, at least the linker will behave | |
3041 | in the same way that it used to do. */ | |
3042 | return FALSE; | |
3043 | ||
3044 | return TRUE; | |
3045 | } | |
3046 | ||
3047 | /* Search the symbol table of the archive element of the archive ABFD | |
3048 | whose archive map contains a mention of SYMDEF, and determine if | |
3049 | the symbol is defined in this element. */ | |
3050 | static bfd_boolean | |
3051 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) | |
3052 | { | |
3053 | Elf_Internal_Shdr * hdr; | |
3054 | bfd_size_type symcount; | |
3055 | bfd_size_type extsymcount; | |
3056 | bfd_size_type extsymoff; | |
3057 | Elf_Internal_Sym *isymbuf; | |
3058 | Elf_Internal_Sym *isym; | |
3059 | Elf_Internal_Sym *isymend; | |
3060 | bfd_boolean result; | |
3061 | ||
3062 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
3063 | if (abfd == NULL) | |
3064 | return FALSE; | |
3065 | ||
f0bf6bfd L |
3066 | /* Return FALSE if the object has been claimed by plugin. */ |
3067 | if (abfd->plugin_format == bfd_plugin_yes) | |
3068 | return FALSE; | |
3069 | ||
0ad989f9 L |
3070 | if (! bfd_check_format (abfd, bfd_object)) |
3071 | return FALSE; | |
3072 | ||
0ad989f9 L |
3073 | /* Select the appropriate symbol table. */ |
3074 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
3075 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3076 | else | |
3077 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3078 | ||
3079 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
3080 | ||
3081 | /* The sh_info field of the symtab header tells us where the | |
3082 | external symbols start. We don't care about the local symbols. */ | |
3083 | if (elf_bad_symtab (abfd)) | |
3084 | { | |
3085 | extsymcount = symcount; | |
3086 | extsymoff = 0; | |
3087 | } | |
3088 | else | |
3089 | { | |
3090 | extsymcount = symcount - hdr->sh_info; | |
3091 | extsymoff = hdr->sh_info; | |
3092 | } | |
3093 | ||
3094 | if (extsymcount == 0) | |
3095 | return FALSE; | |
3096 | ||
3097 | /* Read in the symbol table. */ | |
3098 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3099 | NULL, NULL, NULL); | |
3100 | if (isymbuf == NULL) | |
3101 | return FALSE; | |
3102 | ||
3103 | /* Scan the symbol table looking for SYMDEF. */ | |
3104 | result = FALSE; | |
3105 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
3106 | { | |
3107 | const char *name; | |
3108 | ||
3109 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3110 | isym->st_name); | |
3111 | if (name == NULL) | |
3112 | break; | |
3113 | ||
3114 | if (strcmp (name, symdef->name) == 0) | |
3115 | { | |
3116 | result = is_global_data_symbol_definition (abfd, isym); | |
3117 | break; | |
3118 | } | |
3119 | } | |
3120 | ||
3121 | free (isymbuf); | |
3122 | ||
3123 | return result; | |
3124 | } | |
3125 | \f | |
5a580b3a AM |
3126 | /* Add an entry to the .dynamic table. */ |
3127 | ||
3128 | bfd_boolean | |
3129 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, | |
3130 | bfd_vma tag, | |
3131 | bfd_vma val) | |
3132 | { | |
3133 | struct elf_link_hash_table *hash_table; | |
3134 | const struct elf_backend_data *bed; | |
3135 | asection *s; | |
3136 | bfd_size_type newsize; | |
3137 | bfd_byte *newcontents; | |
3138 | Elf_Internal_Dyn dyn; | |
3139 | ||
3140 | hash_table = elf_hash_table (info); | |
3141 | if (! is_elf_hash_table (hash_table)) | |
3142 | return FALSE; | |
3143 | ||
3144 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3145 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3146 | BFD_ASSERT (s != NULL); |
3147 | ||
eea6121a | 3148 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3149 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a AM |
3150 | if (newcontents == NULL) |
3151 | return FALSE; | |
3152 | ||
3153 | dyn.d_tag = tag; | |
3154 | dyn.d_un.d_val = val; | |
eea6121a | 3155 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3156 | |
eea6121a | 3157 | s->size = newsize; |
5a580b3a AM |
3158 | s->contents = newcontents; |
3159 | ||
3160 | return TRUE; | |
3161 | } | |
3162 | ||
3163 | /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true, | |
3164 | otherwise just check whether one already exists. Returns -1 on error, | |
3165 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ | |
3166 | ||
4ad4eba5 | 3167 | static int |
7e9f0867 AM |
3168 | elf_add_dt_needed_tag (bfd *abfd, |
3169 | struct bfd_link_info *info, | |
4ad4eba5 AM |
3170 | const char *soname, |
3171 | bfd_boolean do_it) | |
5a580b3a AM |
3172 | { |
3173 | struct elf_link_hash_table *hash_table; | |
5a580b3a AM |
3174 | bfd_size_type strindex; |
3175 | ||
7e9f0867 AM |
3176 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3177 | return -1; | |
3178 | ||
5a580b3a | 3179 | hash_table = elf_hash_table (info); |
5a580b3a AM |
3180 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); |
3181 | if (strindex == (bfd_size_type) -1) | |
3182 | return -1; | |
3183 | ||
02be4619 | 3184 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3185 | { |
3186 | asection *sdyn; | |
3187 | const struct elf_backend_data *bed; | |
3188 | bfd_byte *extdyn; | |
3189 | ||
3190 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3191 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3192 | if (sdyn != NULL) |
3193 | for (extdyn = sdyn->contents; | |
3194 | extdyn < sdyn->contents + sdyn->size; | |
3195 | extdyn += bed->s->sizeof_dyn) | |
3196 | { | |
3197 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3198 | |
7e9f0867 AM |
3199 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3200 | if (dyn.d_tag == DT_NEEDED | |
3201 | && dyn.d_un.d_val == strindex) | |
3202 | { | |
3203 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3204 | return 1; | |
3205 | } | |
3206 | } | |
5a580b3a AM |
3207 | } |
3208 | ||
3209 | if (do_it) | |
3210 | { | |
7e9f0867 AM |
3211 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3212 | return -1; | |
3213 | ||
5a580b3a AM |
3214 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3215 | return -1; | |
3216 | } | |
3217 | else | |
3218 | /* We were just checking for existence of the tag. */ | |
3219 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3220 | ||
3221 | return 0; | |
3222 | } | |
3223 | ||
010e5ae2 AM |
3224 | static bfd_boolean |
3225 | on_needed_list (const char *soname, struct bfd_link_needed_list *needed) | |
3226 | { | |
3227 | for (; needed != NULL; needed = needed->next) | |
1240be6b AM |
3228 | if ((elf_dyn_lib_class (needed->by) & DYN_AS_NEEDED) == 0 |
3229 | && strcmp (soname, needed->name) == 0) | |
010e5ae2 AM |
3230 | return TRUE; |
3231 | ||
3232 | return FALSE; | |
3233 | } | |
3234 | ||
14160578 | 3235 | /* Sort symbol by value, section, and size. */ |
4ad4eba5 AM |
3236 | static int |
3237 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3238 | { |
3239 | const struct elf_link_hash_entry *h1; | |
3240 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3241 | bfd_signed_vma vdiff; |
5a580b3a AM |
3242 | |
3243 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3244 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3245 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3246 | if (vdiff != 0) | |
3247 | return vdiff > 0 ? 1 : -1; | |
3248 | else | |
3249 | { | |
d3435ae8 | 3250 | int sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; |
10b7e05b NC |
3251 | if (sdiff != 0) |
3252 | return sdiff > 0 ? 1 : -1; | |
3253 | } | |
14160578 AM |
3254 | vdiff = h1->size - h2->size; |
3255 | return vdiff == 0 ? 0 : vdiff > 0 ? 1 : -1; | |
5a580b3a | 3256 | } |
4ad4eba5 | 3257 | |
5a580b3a AM |
3258 | /* This function is used to adjust offsets into .dynstr for |
3259 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3260 | ||
3261 | static bfd_boolean | |
3262 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) | |
3263 | { | |
a50b1753 | 3264 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3265 | |
5a580b3a AM |
3266 | if (h->dynindx != -1) |
3267 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3268 | return TRUE; | |
3269 | } | |
3270 | ||
3271 | /* Assign string offsets in .dynstr, update all structures referencing | |
3272 | them. */ | |
3273 | ||
4ad4eba5 AM |
3274 | static bfd_boolean |
3275 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
5a580b3a AM |
3276 | { |
3277 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3278 | struct elf_link_local_dynamic_entry *entry; | |
3279 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3280 | bfd *dynobj = hash_table->dynobj; | |
3281 | asection *sdyn; | |
3282 | bfd_size_type size; | |
3283 | const struct elf_backend_data *bed; | |
3284 | bfd_byte *extdyn; | |
3285 | ||
3286 | _bfd_elf_strtab_finalize (dynstr); | |
3287 | size = _bfd_elf_strtab_size (dynstr); | |
3288 | ||
3289 | bed = get_elf_backend_data (dynobj); | |
3d4d4302 | 3290 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3291 | BFD_ASSERT (sdyn != NULL); |
3292 | ||
3293 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3294 | for (extdyn = sdyn->contents; | |
eea6121a | 3295 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3296 | extdyn += bed->s->sizeof_dyn) |
3297 | { | |
3298 | Elf_Internal_Dyn dyn; | |
3299 | ||
3300 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3301 | switch (dyn.d_tag) | |
3302 | { | |
3303 | case DT_STRSZ: | |
3304 | dyn.d_un.d_val = size; | |
3305 | break; | |
3306 | case DT_NEEDED: | |
3307 | case DT_SONAME: | |
3308 | case DT_RPATH: | |
3309 | case DT_RUNPATH: | |
3310 | case DT_FILTER: | |
3311 | case DT_AUXILIARY: | |
7ee314fa AM |
3312 | case DT_AUDIT: |
3313 | case DT_DEPAUDIT: | |
5a580b3a AM |
3314 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3315 | break; | |
3316 | default: | |
3317 | continue; | |
3318 | } | |
3319 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3320 | } | |
3321 | ||
3322 | /* Now update local dynamic symbols. */ | |
3323 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3324 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3325 | entry->isym.st_name); | |
3326 | ||
3327 | /* And the rest of dynamic symbols. */ | |
3328 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3329 | ||
3330 | /* Adjust version definitions. */ | |
3331 | if (elf_tdata (output_bfd)->cverdefs) | |
3332 | { | |
3333 | asection *s; | |
3334 | bfd_byte *p; | |
3335 | bfd_size_type i; | |
3336 | Elf_Internal_Verdef def; | |
3337 | Elf_Internal_Verdaux defaux; | |
3338 | ||
3d4d4302 | 3339 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3340 | p = s->contents; |
3341 | do | |
3342 | { | |
3343 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3344 | &def); | |
3345 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3346 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3347 | continue; | |
5a580b3a AM |
3348 | for (i = 0; i < def.vd_cnt; ++i) |
3349 | { | |
3350 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3351 | (Elf_External_Verdaux *) p, &defaux); | |
3352 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3353 | defaux.vda_name); | |
3354 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3355 | &defaux, (Elf_External_Verdaux *) p); | |
3356 | p += sizeof (Elf_External_Verdaux); | |
3357 | } | |
3358 | } | |
3359 | while (def.vd_next); | |
3360 | } | |
3361 | ||
3362 | /* Adjust version references. */ | |
3363 | if (elf_tdata (output_bfd)->verref) | |
3364 | { | |
3365 | asection *s; | |
3366 | bfd_byte *p; | |
3367 | bfd_size_type i; | |
3368 | Elf_Internal_Verneed need; | |
3369 | Elf_Internal_Vernaux needaux; | |
3370 | ||
3d4d4302 | 3371 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3372 | p = s->contents; |
3373 | do | |
3374 | { | |
3375 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3376 | &need); | |
3377 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3378 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3379 | (Elf_External_Verneed *) p); | |
3380 | p += sizeof (Elf_External_Verneed); | |
3381 | for (i = 0; i < need.vn_cnt; ++i) | |
3382 | { | |
3383 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3384 | (Elf_External_Vernaux *) p, &needaux); | |
3385 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3386 | needaux.vna_name); | |
3387 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3388 | &needaux, | |
3389 | (Elf_External_Vernaux *) p); | |
3390 | p += sizeof (Elf_External_Vernaux); | |
3391 | } | |
3392 | } | |
3393 | while (need.vn_next); | |
3394 | } | |
3395 | ||
3396 | return TRUE; | |
3397 | } | |
3398 | \f | |
13285a1b AM |
3399 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3400 | The default is to only match when the INPUT and OUTPUT are exactly | |
3401 | the same target. */ | |
3402 | ||
3403 | bfd_boolean | |
3404 | _bfd_elf_default_relocs_compatible (const bfd_target *input, | |
3405 | const bfd_target *output) | |
3406 | { | |
3407 | return input == output; | |
3408 | } | |
3409 | ||
3410 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3411 | This version is used when different targets for the same architecture | |
3412 | are virtually identical. */ | |
3413 | ||
3414 | bfd_boolean | |
3415 | _bfd_elf_relocs_compatible (const bfd_target *input, | |
3416 | const bfd_target *output) | |
3417 | { | |
3418 | const struct elf_backend_data *obed, *ibed; | |
3419 | ||
3420 | if (input == output) | |
3421 | return TRUE; | |
3422 | ||
3423 | ibed = xvec_get_elf_backend_data (input); | |
3424 | obed = xvec_get_elf_backend_data (output); | |
3425 | ||
3426 | if (ibed->arch != obed->arch) | |
3427 | return FALSE; | |
3428 | ||
3429 | /* If both backends are using this function, deem them compatible. */ | |
3430 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3431 | } | |
3432 | ||
e5034e59 AM |
3433 | /* Make a special call to the linker "notice" function to tell it that |
3434 | we are about to handle an as-needed lib, or have finished | |
1b786873 | 3435 | processing the lib. */ |
e5034e59 AM |
3436 | |
3437 | bfd_boolean | |
3438 | _bfd_elf_notice_as_needed (bfd *ibfd, | |
3439 | struct bfd_link_info *info, | |
3440 | enum notice_asneeded_action act) | |
3441 | { | |
46135103 | 3442 | return (*info->callbacks->notice) (info, NULL, NULL, ibfd, NULL, act, 0); |
e5034e59 AM |
3443 | } |
3444 | ||
4ad4eba5 AM |
3445 | /* Add symbols from an ELF object file to the linker hash table. */ |
3446 | ||
3447 | static bfd_boolean | |
3448 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) | |
3449 | { | |
a0c402a5 | 3450 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 AM |
3451 | Elf_Internal_Shdr *hdr; |
3452 | bfd_size_type symcount; | |
3453 | bfd_size_type extsymcount; | |
3454 | bfd_size_type extsymoff; | |
3455 | struct elf_link_hash_entry **sym_hash; | |
3456 | bfd_boolean dynamic; | |
3457 | Elf_External_Versym *extversym = NULL; | |
3458 | Elf_External_Versym *ever; | |
3459 | struct elf_link_hash_entry *weaks; | |
3460 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
3461 | bfd_size_type nondeflt_vers_cnt = 0; | |
3462 | Elf_Internal_Sym *isymbuf = NULL; | |
3463 | Elf_Internal_Sym *isym; | |
3464 | Elf_Internal_Sym *isymend; | |
3465 | const struct elf_backend_data *bed; | |
3466 | bfd_boolean add_needed; | |
66eb6687 | 3467 | struct elf_link_hash_table *htab; |
4ad4eba5 | 3468 | bfd_size_type amt; |
66eb6687 | 3469 | void *alloc_mark = NULL; |
4f87808c AM |
3470 | struct bfd_hash_entry **old_table = NULL; |
3471 | unsigned int old_size = 0; | |
3472 | unsigned int old_count = 0; | |
66eb6687 | 3473 | void *old_tab = NULL; |
66eb6687 AM |
3474 | void *old_ent; |
3475 | struct bfd_link_hash_entry *old_undefs = NULL; | |
3476 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
3477 | long old_dynsymcount = 0; | |
a4542f1b | 3478 | bfd_size_type old_dynstr_size = 0; |
66eb6687 | 3479 | size_t tabsize = 0; |
db6a5d5f | 3480 | asection *s; |
29a9f53e | 3481 | bfd_boolean just_syms; |
4ad4eba5 | 3482 | |
66eb6687 | 3483 | htab = elf_hash_table (info); |
4ad4eba5 | 3484 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
3485 | |
3486 | if ((abfd->flags & DYNAMIC) == 0) | |
3487 | dynamic = FALSE; | |
3488 | else | |
3489 | { | |
3490 | dynamic = TRUE; | |
3491 | ||
3492 | /* You can't use -r against a dynamic object. Also, there's no | |
3493 | hope of using a dynamic object which does not exactly match | |
3494 | the format of the output file. */ | |
0e1862bb | 3495 | if (bfd_link_relocatable (info) |
66eb6687 | 3496 | || !is_elf_hash_table (htab) |
f13a99db | 3497 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 3498 | { |
0e1862bb | 3499 | if (bfd_link_relocatable (info)) |
9a0789ec NC |
3500 | bfd_set_error (bfd_error_invalid_operation); |
3501 | else | |
3502 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
3503 | goto error_return; |
3504 | } | |
3505 | } | |
3506 | ||
a0c402a5 L |
3507 | ehdr = elf_elfheader (abfd); |
3508 | if (info->warn_alternate_em | |
3509 | && bed->elf_machine_code != ehdr->e_machine | |
3510 | && ((bed->elf_machine_alt1 != 0 | |
3511 | && ehdr->e_machine == bed->elf_machine_alt1) | |
3512 | || (bed->elf_machine_alt2 != 0 | |
3513 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
3514 | info->callbacks->einfo | |
3515 | (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"), | |
3516 | ehdr->e_machine, abfd, bed->elf_machine_code); | |
3517 | ||
4ad4eba5 AM |
3518 | /* As a GNU extension, any input sections which are named |
3519 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
3520 | symbol. This differs from .gnu.warning sections, which generate | |
3521 | warnings when they are included in an output file. */ | |
dd98f8d2 | 3522 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 3523 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 3524 | { |
db6a5d5f | 3525 | const char *name; |
4ad4eba5 | 3526 | |
db6a5d5f AM |
3527 | name = bfd_get_section_name (abfd, s); |
3528 | if (CONST_STRNEQ (name, ".gnu.warning.")) | |
4ad4eba5 | 3529 | { |
db6a5d5f AM |
3530 | char *msg; |
3531 | bfd_size_type sz; | |
3532 | ||
3533 | name += sizeof ".gnu.warning." - 1; | |
3534 | ||
3535 | /* If this is a shared object, then look up the symbol | |
3536 | in the hash table. If it is there, and it is already | |
3537 | been defined, then we will not be using the entry | |
3538 | from this shared object, so we don't need to warn. | |
3539 | FIXME: If we see the definition in a regular object | |
3540 | later on, we will warn, but we shouldn't. The only | |
3541 | fix is to keep track of what warnings we are supposed | |
3542 | to emit, and then handle them all at the end of the | |
3543 | link. */ | |
3544 | if (dynamic) | |
4ad4eba5 | 3545 | { |
db6a5d5f AM |
3546 | struct elf_link_hash_entry *h; |
3547 | ||
3548 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); | |
3549 | ||
3550 | /* FIXME: What about bfd_link_hash_common? */ | |
3551 | if (h != NULL | |
3552 | && (h->root.type == bfd_link_hash_defined | |
3553 | || h->root.type == bfd_link_hash_defweak)) | |
3554 | continue; | |
3555 | } | |
4ad4eba5 | 3556 | |
db6a5d5f AM |
3557 | sz = s->size; |
3558 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
3559 | if (msg == NULL) | |
3560 | goto error_return; | |
4ad4eba5 | 3561 | |
db6a5d5f AM |
3562 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
3563 | goto error_return; | |
4ad4eba5 | 3564 | |
db6a5d5f | 3565 | msg[sz] = '\0'; |
4ad4eba5 | 3566 | |
db6a5d5f AM |
3567 | if (! (_bfd_generic_link_add_one_symbol |
3568 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
3569 | FALSE, bed->collect, NULL))) | |
3570 | goto error_return; | |
4ad4eba5 | 3571 | |
0e1862bb | 3572 | if (bfd_link_executable (info)) |
db6a5d5f AM |
3573 | { |
3574 | /* Clobber the section size so that the warning does | |
3575 | not get copied into the output file. */ | |
3576 | s->size = 0; | |
11d2f718 | 3577 | |
db6a5d5f AM |
3578 | /* Also set SEC_EXCLUDE, so that symbols defined in |
3579 | the warning section don't get copied to the output. */ | |
3580 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
3581 | } |
3582 | } | |
3583 | } | |
3584 | ||
29a9f53e L |
3585 | just_syms = ((s = abfd->sections) != NULL |
3586 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS); | |
3587 | ||
4ad4eba5 AM |
3588 | add_needed = TRUE; |
3589 | if (! dynamic) | |
3590 | { | |
3591 | /* If we are creating a shared library, create all the dynamic | |
3592 | sections immediately. We need to attach them to something, | |
3593 | so we attach them to this BFD, provided it is the right | |
29a9f53e L |
3594 | format and is not from ld --just-symbols. FIXME: If there |
3595 | are no input BFD's of the same format as the output, we can't | |
3596 | make a shared library. */ | |
3597 | if (!just_syms | |
0e1862bb | 3598 | && bfd_link_pic (info) |
66eb6687 | 3599 | && is_elf_hash_table (htab) |
f13a99db | 3600 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 3601 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
3602 | { |
3603 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
3604 | goto error_return; | |
3605 | } | |
3606 | } | |
66eb6687 | 3607 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
3608 | goto error_return; |
3609 | else | |
3610 | { | |
4ad4eba5 | 3611 | const char *soname = NULL; |
7ee314fa | 3612 | char *audit = NULL; |
4ad4eba5 AM |
3613 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
3614 | int ret; | |
3615 | ||
3616 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 3617 | ld shouldn't allow it. */ |
29a9f53e | 3618 | if (just_syms) |
92fd189d | 3619 | abort (); |
4ad4eba5 AM |
3620 | |
3621 | /* If this dynamic lib was specified on the command line with | |
3622 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
3623 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
3624 | in by another lib's DT_NEEDED. When --no-add-needed is used |
3625 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
3626 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
3627 | all. */ | |
3628 | add_needed = (elf_dyn_lib_class (abfd) | |
3629 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
3630 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
3631 | |
3632 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
3633 | if (s != NULL) | |
3634 | { | |
3635 | bfd_byte *dynbuf; | |
3636 | bfd_byte *extdyn; | |
cb33740c | 3637 | unsigned int elfsec; |
4ad4eba5 AM |
3638 | unsigned long shlink; |
3639 | ||
eea6121a | 3640 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 L |
3641 | { |
3642 | error_free_dyn: | |
3643 | free (dynbuf); | |
3644 | goto error_return; | |
3645 | } | |
4ad4eba5 AM |
3646 | |
3647 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 3648 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
3649 | goto error_free_dyn; |
3650 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
3651 | ||
3652 | for (extdyn = dynbuf; | |
eea6121a | 3653 | extdyn < dynbuf + s->size; |
4ad4eba5 AM |
3654 | extdyn += bed->s->sizeof_dyn) |
3655 | { | |
3656 | Elf_Internal_Dyn dyn; | |
3657 | ||
3658 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
3659 | if (dyn.d_tag == DT_SONAME) | |
3660 | { | |
3661 | unsigned int tagv = dyn.d_un.d_val; | |
3662 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3663 | if (soname == NULL) | |
3664 | goto error_free_dyn; | |
3665 | } | |
3666 | if (dyn.d_tag == DT_NEEDED) | |
3667 | { | |
3668 | struct bfd_link_needed_list *n, **pn; | |
3669 | char *fnm, *anm; | |
3670 | unsigned int tagv = dyn.d_un.d_val; | |
3671 | ||
3672 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3673 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3674 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3675 | if (n == NULL || fnm == NULL) | |
3676 | goto error_free_dyn; | |
3677 | amt = strlen (fnm) + 1; | |
a50b1753 | 3678 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3679 | if (anm == NULL) |
3680 | goto error_free_dyn; | |
3681 | memcpy (anm, fnm, amt); | |
3682 | n->name = anm; | |
3683 | n->by = abfd; | |
3684 | n->next = NULL; | |
66eb6687 | 3685 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3686 | ; |
3687 | *pn = n; | |
3688 | } | |
3689 | if (dyn.d_tag == DT_RUNPATH) | |
3690 | { | |
3691 | struct bfd_link_needed_list *n, **pn; | |
3692 | char *fnm, *anm; | |
3693 | unsigned int tagv = dyn.d_un.d_val; | |
3694 | ||
3695 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3696 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3697 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3698 | if (n == NULL || fnm == NULL) | |
3699 | goto error_free_dyn; | |
3700 | amt = strlen (fnm) + 1; | |
a50b1753 | 3701 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3702 | if (anm == NULL) |
3703 | goto error_free_dyn; | |
3704 | memcpy (anm, fnm, amt); | |
3705 | n->name = anm; | |
3706 | n->by = abfd; | |
3707 | n->next = NULL; | |
3708 | for (pn = & runpath; | |
3709 | *pn != NULL; | |
3710 | pn = &(*pn)->next) | |
3711 | ; | |
3712 | *pn = n; | |
3713 | } | |
3714 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
3715 | if (!runpath && dyn.d_tag == DT_RPATH) | |
3716 | { | |
3717 | struct bfd_link_needed_list *n, **pn; | |
3718 | char *fnm, *anm; | |
3719 | unsigned int tagv = dyn.d_un.d_val; | |
3720 | ||
3721 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3722 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3723 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3724 | if (n == NULL || fnm == NULL) | |
3725 | goto error_free_dyn; | |
3726 | amt = strlen (fnm) + 1; | |
a50b1753 | 3727 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 3728 | if (anm == NULL) |
f8703194 | 3729 | goto error_free_dyn; |
4ad4eba5 AM |
3730 | memcpy (anm, fnm, amt); |
3731 | n->name = anm; | |
3732 | n->by = abfd; | |
3733 | n->next = NULL; | |
3734 | for (pn = & rpath; | |
3735 | *pn != NULL; | |
3736 | pn = &(*pn)->next) | |
3737 | ; | |
3738 | *pn = n; | |
3739 | } | |
7ee314fa AM |
3740 | if (dyn.d_tag == DT_AUDIT) |
3741 | { | |
3742 | unsigned int tagv = dyn.d_un.d_val; | |
3743 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3744 | } | |
4ad4eba5 AM |
3745 | } |
3746 | ||
3747 | free (dynbuf); | |
3748 | } | |
3749 | ||
3750 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
3751 | frees all more recently bfd_alloc'd blocks as well. */ | |
3752 | if (runpath) | |
3753 | rpath = runpath; | |
3754 | ||
3755 | if (rpath) | |
3756 | { | |
3757 | struct bfd_link_needed_list **pn; | |
66eb6687 | 3758 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3759 | ; |
3760 | *pn = rpath; | |
3761 | } | |
3762 | ||
3763 | /* We do not want to include any of the sections in a dynamic | |
3764 | object in the output file. We hack by simply clobbering the | |
3765 | list of sections in the BFD. This could be handled more | |
3766 | cleanly by, say, a new section flag; the existing | |
3767 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
3768 | still implies that the section takes up space in the output | |
3769 | file. */ | |
3770 | bfd_section_list_clear (abfd); | |
3771 | ||
4ad4eba5 AM |
3772 | /* Find the name to use in a DT_NEEDED entry that refers to this |
3773 | object. If the object has a DT_SONAME entry, we use it. | |
3774 | Otherwise, if the generic linker stuck something in | |
3775 | elf_dt_name, we use that. Otherwise, we just use the file | |
3776 | name. */ | |
3777 | if (soname == NULL || *soname == '\0') | |
3778 | { | |
3779 | soname = elf_dt_name (abfd); | |
3780 | if (soname == NULL || *soname == '\0') | |
3781 | soname = bfd_get_filename (abfd); | |
3782 | } | |
3783 | ||
3784 | /* Save the SONAME because sometimes the linker emulation code | |
3785 | will need to know it. */ | |
3786 | elf_dt_name (abfd) = soname; | |
3787 | ||
7e9f0867 | 3788 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
3789 | if (ret < 0) |
3790 | goto error_return; | |
3791 | ||
3792 | /* If we have already included this dynamic object in the | |
3793 | link, just ignore it. There is no reason to include a | |
3794 | particular dynamic object more than once. */ | |
3795 | if (ret > 0) | |
3796 | return TRUE; | |
7ee314fa AM |
3797 | |
3798 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 3799 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
3800 | } |
3801 | ||
3802 | /* If this is a dynamic object, we always link against the .dynsym | |
3803 | symbol table, not the .symtab symbol table. The dynamic linker | |
3804 | will only see the .dynsym symbol table, so there is no reason to | |
3805 | look at .symtab for a dynamic object. */ | |
3806 | ||
3807 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
3808 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3809 | else | |
3810 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3811 | ||
3812 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
3813 | ||
3814 | /* The sh_info field of the symtab header tells us where the | |
3815 | external symbols start. We don't care about the local symbols at | |
3816 | this point. */ | |
3817 | if (elf_bad_symtab (abfd)) | |
3818 | { | |
3819 | extsymcount = symcount; | |
3820 | extsymoff = 0; | |
3821 | } | |
3822 | else | |
3823 | { | |
3824 | extsymcount = symcount - hdr->sh_info; | |
3825 | extsymoff = hdr->sh_info; | |
3826 | } | |
3827 | ||
f45794cb | 3828 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 3829 | if (extsymcount != 0) |
4ad4eba5 AM |
3830 | { |
3831 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3832 | NULL, NULL, NULL); | |
3833 | if (isymbuf == NULL) | |
3834 | goto error_return; | |
3835 | ||
4ad4eba5 | 3836 | if (sym_hash == NULL) |
012b2306 AM |
3837 | { |
3838 | /* We store a pointer to the hash table entry for each | |
3839 | external symbol. */ | |
3840 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
3841 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); | |
3842 | if (sym_hash == NULL) | |
3843 | goto error_free_sym; | |
3844 | elf_sym_hashes (abfd) = sym_hash; | |
3845 | } | |
4ad4eba5 AM |
3846 | } |
3847 | ||
3848 | if (dynamic) | |
3849 | { | |
3850 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
3851 | if (!_bfd_elf_slurp_version_tables (abfd, |
3852 | info->default_imported_symver)) | |
4ad4eba5 AM |
3853 | goto error_free_sym; |
3854 | ||
3855 | /* Read in the symbol versions, but don't bother to convert them | |
3856 | to internal format. */ | |
3857 | if (elf_dynversym (abfd) != 0) | |
3858 | { | |
3859 | Elf_Internal_Shdr *versymhdr; | |
3860 | ||
3861 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
a50b1753 | 3862 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
4ad4eba5 AM |
3863 | if (extversym == NULL) |
3864 | goto error_free_sym; | |
3865 | amt = versymhdr->sh_size; | |
3866 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
3867 | || bfd_bread (extversym, amt, abfd) != amt) | |
3868 | goto error_free_vers; | |
3869 | } | |
3870 | } | |
3871 | ||
66eb6687 AM |
3872 | /* If we are loading an as-needed shared lib, save the symbol table |
3873 | state before we start adding symbols. If the lib turns out | |
3874 | to be unneeded, restore the state. */ | |
3875 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
3876 | { | |
3877 | unsigned int i; | |
3878 | size_t entsize; | |
3879 | ||
3880 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
3881 | { | |
3882 | struct bfd_hash_entry *p; | |
2de92251 | 3883 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3884 | |
3885 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
3886 | { |
3887 | h = (struct elf_link_hash_entry *) p; | |
3888 | entsize += htab->root.table.entsize; | |
3889 | if (h->root.type == bfd_link_hash_warning) | |
3890 | entsize += htab->root.table.entsize; | |
3891 | } | |
66eb6687 AM |
3892 | } |
3893 | ||
3894 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 3895 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
3896 | if (old_tab == NULL) |
3897 | goto error_free_vers; | |
3898 | ||
3899 | /* Remember the current objalloc pointer, so that all mem for | |
3900 | symbols added can later be reclaimed. */ | |
3901 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
3902 | if (alloc_mark == NULL) | |
3903 | goto error_free_vers; | |
3904 | ||
5061a885 AM |
3905 | /* Make a special call to the linker "notice" function to |
3906 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 3907 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 3908 | goto error_free_vers; |
5061a885 | 3909 | |
f45794cb AM |
3910 | /* Clone the symbol table. Remember some pointers into the |
3911 | symbol table, and dynamic symbol count. */ | |
3912 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 3913 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
3914 | old_undefs = htab->root.undefs; |
3915 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
3916 | old_table = htab->root.table.table; |
3917 | old_size = htab->root.table.size; | |
3918 | old_count = htab->root.table.count; | |
66eb6687 | 3919 | old_dynsymcount = htab->dynsymcount; |
a4542f1b | 3920 | old_dynstr_size = _bfd_elf_strtab_size (htab->dynstr); |
66eb6687 AM |
3921 | |
3922 | for (i = 0; i < htab->root.table.size; i++) | |
3923 | { | |
3924 | struct bfd_hash_entry *p; | |
2de92251 | 3925 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3926 | |
3927 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
3928 | { | |
3929 | memcpy (old_ent, p, htab->root.table.entsize); | |
3930 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
3931 | h = (struct elf_link_hash_entry *) p; |
3932 | if (h->root.type == bfd_link_hash_warning) | |
3933 | { | |
3934 | memcpy (old_ent, h->root.u.i.link, htab->root.table.entsize); | |
3935 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
3936 | } | |
66eb6687 AM |
3937 | } |
3938 | } | |
3939 | } | |
4ad4eba5 | 3940 | |
66eb6687 | 3941 | weaks = NULL; |
4ad4eba5 AM |
3942 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
3943 | for (isym = isymbuf, isymend = isymbuf + extsymcount; | |
3944 | isym < isymend; | |
3945 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
3946 | { | |
3947 | int bind; | |
3948 | bfd_vma value; | |
af44c138 | 3949 | asection *sec, *new_sec; |
4ad4eba5 AM |
3950 | flagword flags; |
3951 | const char *name; | |
3952 | struct elf_link_hash_entry *h; | |
90c984fc | 3953 | struct elf_link_hash_entry *hi; |
4ad4eba5 AM |
3954 | bfd_boolean definition; |
3955 | bfd_boolean size_change_ok; | |
3956 | bfd_boolean type_change_ok; | |
3957 | bfd_boolean new_weakdef; | |
37a9e49a L |
3958 | bfd_boolean new_weak; |
3959 | bfd_boolean old_weak; | |
4ad4eba5 | 3960 | bfd_boolean override; |
a4d8e49b | 3961 | bfd_boolean common; |
4ad4eba5 AM |
3962 | unsigned int old_alignment; |
3963 | bfd *old_bfd; | |
6e33951e | 3964 | bfd_boolean matched; |
4ad4eba5 AM |
3965 | |
3966 | override = FALSE; | |
3967 | ||
3968 | flags = BSF_NO_FLAGS; | |
3969 | sec = NULL; | |
3970 | value = isym->st_value; | |
a4d8e49b | 3971 | common = bed->common_definition (isym); |
4ad4eba5 AM |
3972 | |
3973 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 3974 | switch (bind) |
4ad4eba5 | 3975 | { |
3e7a7d11 | 3976 | case STB_LOCAL: |
4ad4eba5 AM |
3977 | /* This should be impossible, since ELF requires that all |
3978 | global symbols follow all local symbols, and that sh_info | |
3979 | point to the first global symbol. Unfortunately, Irix 5 | |
3980 | screws this up. */ | |
3981 | continue; | |
3e7a7d11 NC |
3982 | |
3983 | case STB_GLOBAL: | |
a4d8e49b | 3984 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 3985 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
3986 | break; |
3987 | ||
3988 | case STB_WEAK: | |
3989 | flags = BSF_WEAK; | |
3990 | break; | |
3991 | ||
3992 | case STB_GNU_UNIQUE: | |
3993 | flags = BSF_GNU_UNIQUE; | |
3994 | break; | |
3995 | ||
3996 | default: | |
4ad4eba5 | 3997 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 3998 | break; |
4ad4eba5 AM |
3999 | } |
4000 | ||
4001 | if (isym->st_shndx == SHN_UNDEF) | |
4002 | sec = bfd_und_section_ptr; | |
cb33740c AM |
4003 | else if (isym->st_shndx == SHN_ABS) |
4004 | sec = bfd_abs_section_ptr; | |
4005 | else if (isym->st_shndx == SHN_COMMON) | |
4006 | { | |
4007 | sec = bfd_com_section_ptr; | |
4008 | /* What ELF calls the size we call the value. What ELF | |
4009 | calls the value we call the alignment. */ | |
4010 | value = isym->st_size; | |
4011 | } | |
4012 | else | |
4ad4eba5 AM |
4013 | { |
4014 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
4015 | if (sec == NULL) | |
4016 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 4017 | else if (discarded_section (sec)) |
529fcb95 | 4018 | { |
e5d08002 L |
4019 | /* Symbols from discarded section are undefined. We keep |
4020 | its visibility. */ | |
529fcb95 PB |
4021 | sec = bfd_und_section_ptr; |
4022 | isym->st_shndx = SHN_UNDEF; | |
4023 | } | |
4ad4eba5 AM |
4024 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
4025 | value -= sec->vma; | |
4026 | } | |
4ad4eba5 AM |
4027 | |
4028 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
4029 | isym->st_name); | |
4030 | if (name == NULL) | |
4031 | goto error_free_vers; | |
4032 | ||
4033 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
4034 | && (abfd->flags & BFD_PLUGIN) != 0) |
4035 | { | |
4036 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
4037 | ||
4038 | if (xc == NULL) | |
4039 | { | |
4040 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
4041 | | SEC_EXCLUDE); | |
4042 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
4043 | if (xc == NULL) | |
4044 | goto error_free_vers; | |
4045 | } | |
4046 | sec = xc; | |
4047 | } | |
4048 | else if (isym->st_shndx == SHN_COMMON | |
4049 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
0e1862bb | 4050 | && !bfd_link_relocatable (info)) |
4ad4eba5 AM |
4051 | { |
4052 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
4053 | ||
4054 | if (tcomm == NULL) | |
4055 | { | |
02d00247 AM |
4056 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
4057 | | SEC_LINKER_CREATED); | |
4058 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 4059 | if (tcomm == NULL) |
4ad4eba5 AM |
4060 | goto error_free_vers; |
4061 | } | |
4062 | sec = tcomm; | |
4063 | } | |
66eb6687 | 4064 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 4065 | { |
66eb6687 AM |
4066 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
4067 | &sec, &value)) | |
4ad4eba5 AM |
4068 | goto error_free_vers; |
4069 | ||
4070 | /* The hook function sets the name to NULL if this symbol | |
4071 | should be skipped for some reason. */ | |
4072 | if (name == NULL) | |
4073 | continue; | |
4074 | } | |
4075 | ||
4076 | /* Sanity check that all possibilities were handled. */ | |
4077 | if (sec == NULL) | |
4078 | { | |
4079 | bfd_set_error (bfd_error_bad_value); | |
4080 | goto error_free_vers; | |
4081 | } | |
4082 | ||
191c0c42 AM |
4083 | /* Silently discard TLS symbols from --just-syms. There's |
4084 | no way to combine a static TLS block with a new TLS block | |
4085 | for this executable. */ | |
4086 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
4087 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
4088 | continue; | |
4089 | ||
4ad4eba5 AM |
4090 | if (bfd_is_und_section (sec) |
4091 | || bfd_is_com_section (sec)) | |
4092 | definition = FALSE; | |
4093 | else | |
4094 | definition = TRUE; | |
4095 | ||
4096 | size_change_ok = FALSE; | |
66eb6687 | 4097 | type_change_ok = bed->type_change_ok; |
37a9e49a | 4098 | old_weak = FALSE; |
6e33951e | 4099 | matched = FALSE; |
4ad4eba5 AM |
4100 | old_alignment = 0; |
4101 | old_bfd = NULL; | |
af44c138 | 4102 | new_sec = sec; |
4ad4eba5 | 4103 | |
66eb6687 | 4104 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
4105 | { |
4106 | Elf_Internal_Versym iver; | |
4107 | unsigned int vernum = 0; | |
4108 | bfd_boolean skip; | |
4109 | ||
fc0e6df6 | 4110 | if (ever == NULL) |
4ad4eba5 | 4111 | { |
fc0e6df6 PB |
4112 | if (info->default_imported_symver) |
4113 | /* Use the default symbol version created earlier. */ | |
4114 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
4115 | else | |
4116 | iver.vs_vers = 0; | |
4117 | } | |
4118 | else | |
4119 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4120 | ||
4121 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4122 | ||
4123 | /* If this is a hidden symbol, or if it is not version | |
4124 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4125 | However, we do not modify a non-hidden absolute symbol |
4126 | if it is not a function, because it might be the version | |
4127 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4128 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4129 | || (vernum > 1 |
4130 | && (!bfd_is_abs_section (sec) | |
4131 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4132 | { |
4133 | const char *verstr; | |
4134 | size_t namelen, verlen, newlen; | |
4135 | char *newname, *p; | |
4136 | ||
4137 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4138 | { |
fc0e6df6 PB |
4139 | if (vernum > elf_tdata (abfd)->cverdefs) |
4140 | verstr = NULL; | |
4141 | else if (vernum > 1) | |
4142 | verstr = | |
4143 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4144 | else | |
4145 | verstr = ""; | |
4ad4eba5 | 4146 | |
fc0e6df6 | 4147 | if (verstr == NULL) |
4ad4eba5 | 4148 | { |
fc0e6df6 PB |
4149 | (*_bfd_error_handler) |
4150 | (_("%B: %s: invalid version %u (max %d)"), | |
4151 | abfd, name, vernum, | |
4152 | elf_tdata (abfd)->cverdefs); | |
4153 | bfd_set_error (bfd_error_bad_value); | |
4154 | goto error_free_vers; | |
4ad4eba5 | 4155 | } |
fc0e6df6 PB |
4156 | } |
4157 | else | |
4158 | { | |
4159 | /* We cannot simply test for the number of | |
4160 | entries in the VERNEED section since the | |
4161 | numbers for the needed versions do not start | |
4162 | at 0. */ | |
4163 | Elf_Internal_Verneed *t; | |
4164 | ||
4165 | verstr = NULL; | |
4166 | for (t = elf_tdata (abfd)->verref; | |
4167 | t != NULL; | |
4168 | t = t->vn_nextref) | |
4ad4eba5 | 4169 | { |
fc0e6df6 | 4170 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4171 | |
fc0e6df6 PB |
4172 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4173 | { | |
4174 | if (a->vna_other == vernum) | |
4ad4eba5 | 4175 | { |
fc0e6df6 PB |
4176 | verstr = a->vna_nodename; |
4177 | break; | |
4ad4eba5 | 4178 | } |
4ad4eba5 | 4179 | } |
fc0e6df6 PB |
4180 | if (a != NULL) |
4181 | break; | |
4182 | } | |
4183 | if (verstr == NULL) | |
4184 | { | |
4185 | (*_bfd_error_handler) | |
4186 | (_("%B: %s: invalid needed version %d"), | |
4187 | abfd, name, vernum); | |
4188 | bfd_set_error (bfd_error_bad_value); | |
4189 | goto error_free_vers; | |
4ad4eba5 | 4190 | } |
4ad4eba5 | 4191 | } |
fc0e6df6 PB |
4192 | |
4193 | namelen = strlen (name); | |
4194 | verlen = strlen (verstr); | |
4195 | newlen = namelen + verlen + 2; | |
4196 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4197 | && isym->st_shndx != SHN_UNDEF) | |
4198 | ++newlen; | |
4199 | ||
a50b1753 | 4200 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4201 | if (newname == NULL) |
4202 | goto error_free_vers; | |
4203 | memcpy (newname, name, namelen); | |
4204 | p = newname + namelen; | |
4205 | *p++ = ELF_VER_CHR; | |
4206 | /* If this is a defined non-hidden version symbol, | |
4207 | we add another @ to the name. This indicates the | |
4208 | default version of the symbol. */ | |
4209 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4210 | && isym->st_shndx != SHN_UNDEF) | |
4211 | *p++ = ELF_VER_CHR; | |
4212 | memcpy (p, verstr, verlen + 1); | |
4213 | ||
4214 | name = newname; | |
4ad4eba5 AM |
4215 | } |
4216 | ||
cd3416da AM |
4217 | /* If this symbol has default visibility and the user has |
4218 | requested we not re-export it, then mark it as hidden. */ | |
4219 | if (definition | |
4220 | && !dynamic | |
ce875075 | 4221 | && abfd->no_export |
cd3416da AM |
4222 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) |
4223 | isym->st_other = (STV_HIDDEN | |
4224 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
4225 | ||
4f3fedcf AM |
4226 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4227 | sym_hash, &old_bfd, &old_weak, | |
4228 | &old_alignment, &skip, &override, | |
6e33951e L |
4229 | &type_change_ok, &size_change_ok, |
4230 | &matched)) | |
4ad4eba5 AM |
4231 | goto error_free_vers; |
4232 | ||
4233 | if (skip) | |
4234 | continue; | |
4235 | ||
6e33951e L |
4236 | /* Override a definition only if the new symbol matches the |
4237 | existing one. */ | |
4238 | if (override && matched) | |
4ad4eba5 AM |
4239 | definition = FALSE; |
4240 | ||
4241 | h = *sym_hash; | |
4242 | while (h->root.type == bfd_link_hash_indirect | |
4243 | || h->root.type == bfd_link_hash_warning) | |
4244 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4245 | ||
4ad4eba5 | 4246 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4247 | && vernum > 1 |
4248 | && definition) | |
4249 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4250 | } | |
4251 | ||
4252 | if (! (_bfd_generic_link_add_one_symbol | |
66eb6687 | 4253 | (info, abfd, name, flags, sec, value, NULL, FALSE, bed->collect, |
4ad4eba5 AM |
4254 | (struct bfd_link_hash_entry **) sym_hash))) |
4255 | goto error_free_vers; | |
4256 | ||
4257 | h = *sym_hash; | |
90c984fc L |
4258 | /* We need to make sure that indirect symbol dynamic flags are |
4259 | updated. */ | |
4260 | hi = h; | |
4ad4eba5 AM |
4261 | while (h->root.type == bfd_link_hash_indirect |
4262 | || h->root.type == bfd_link_hash_warning) | |
4263 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4264 | |
4ad4eba5 AM |
4265 | *sym_hash = h; |
4266 | ||
37a9e49a | 4267 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4268 | new_weakdef = FALSE; |
4269 | if (dynamic | |
4270 | && definition | |
37a9e49a | 4271 | && new_weak |
fcb93ecf | 4272 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4273 | && is_elf_hash_table (htab) |
f6e332e6 | 4274 | && h->u.weakdef == NULL) |
4ad4eba5 AM |
4275 | { |
4276 | /* Keep a list of all weak defined non function symbols from | |
4277 | a dynamic object, using the weakdef field. Later in this | |
4278 | function we will set the weakdef field to the correct | |
4279 | value. We only put non-function symbols from dynamic | |
4280 | objects on this list, because that happens to be the only | |
4281 | time we need to know the normal symbol corresponding to a | |
4282 | weak symbol, and the information is time consuming to | |
4283 | figure out. If the weakdef field is not already NULL, | |
4284 | then this symbol was already defined by some previous | |
4285 | dynamic object, and we will be using that previous | |
4286 | definition anyhow. */ | |
4287 | ||
f6e332e6 | 4288 | h->u.weakdef = weaks; |
4ad4eba5 AM |
4289 | weaks = h; |
4290 | new_weakdef = TRUE; | |
4291 | } | |
4292 | ||
4293 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 4294 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
4295 | && h->root.type == bfd_link_hash_common) |
4296 | { | |
4297 | unsigned int align; | |
4298 | ||
a4d8e49b | 4299 | if (common) |
af44c138 L |
4300 | align = bfd_log2 (isym->st_value); |
4301 | else | |
4302 | { | |
4303 | /* The new symbol is a common symbol in a shared object. | |
4304 | We need to get the alignment from the section. */ | |
4305 | align = new_sec->alignment_power; | |
4306 | } | |
595213d4 | 4307 | if (align > old_alignment) |
4ad4eba5 AM |
4308 | h->root.u.c.p->alignment_power = align; |
4309 | else | |
4310 | h->root.u.c.p->alignment_power = old_alignment; | |
4311 | } | |
4312 | ||
66eb6687 | 4313 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 4314 | { |
4f3fedcf AM |
4315 | /* Set a flag in the hash table entry indicating the type of |
4316 | reference or definition we just found. A dynamic symbol | |
4317 | is one which is referenced or defined by both a regular | |
4318 | object and a shared object. */ | |
4319 | bfd_boolean dynsym = FALSE; | |
4320 | ||
4321 | /* Plugin symbols aren't normal. Don't set def_regular or | |
4322 | ref_regular for them, or make them dynamic. */ | |
4323 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4324 | ; | |
4325 | else if (! dynamic) | |
4326 | { | |
4327 | if (! definition) | |
4328 | { | |
4329 | h->ref_regular = 1; | |
4330 | if (bind != STB_WEAK) | |
4331 | h->ref_regular_nonweak = 1; | |
4332 | } | |
4333 | else | |
4334 | { | |
4335 | h->def_regular = 1; | |
4336 | if (h->def_dynamic) | |
4337 | { | |
4338 | h->def_dynamic = 0; | |
4339 | h->ref_dynamic = 1; | |
4340 | } | |
4341 | } | |
4342 | ||
4343 | /* If the indirect symbol has been forced local, don't | |
4344 | make the real symbol dynamic. */ | |
4345 | if ((h == hi || !hi->forced_local) | |
0e1862bb | 4346 | && (bfd_link_dll (info) |
4f3fedcf AM |
4347 | || h->def_dynamic |
4348 | || h->ref_dynamic)) | |
4349 | dynsym = TRUE; | |
4350 | } | |
4351 | else | |
4352 | { | |
4353 | if (! definition) | |
4354 | { | |
4355 | h->ref_dynamic = 1; | |
4356 | hi->ref_dynamic = 1; | |
4357 | } | |
4358 | else | |
4359 | { | |
4360 | h->def_dynamic = 1; | |
4361 | hi->def_dynamic = 1; | |
4362 | } | |
4363 | ||
4364 | /* If the indirect symbol has been forced local, don't | |
4365 | make the real symbol dynamic. */ | |
4366 | if ((h == hi || !hi->forced_local) | |
4367 | && (h->def_regular | |
4368 | || h->ref_regular | |
4369 | || (h->u.weakdef != NULL | |
4370 | && ! new_weakdef | |
4371 | && h->u.weakdef->dynindx != -1))) | |
4372 | dynsym = TRUE; | |
4373 | } | |
4374 | ||
4375 | /* Check to see if we need to add an indirect symbol for | |
4376 | the default name. */ | |
4377 | if (definition | |
4378 | || (!override && h->root.type == bfd_link_hash_common)) | |
4379 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
4380 | sec, value, &old_bfd, &dynsym)) | |
4381 | goto error_free_vers; | |
4ad4eba5 AM |
4382 | |
4383 | /* Check the alignment when a common symbol is involved. This | |
4384 | can change when a common symbol is overridden by a normal | |
4385 | definition or a common symbol is ignored due to the old | |
4386 | normal definition. We need to make sure the maximum | |
4387 | alignment is maintained. */ | |
a4d8e49b | 4388 | if ((old_alignment || common) |
4ad4eba5 AM |
4389 | && h->root.type != bfd_link_hash_common) |
4390 | { | |
4391 | unsigned int common_align; | |
4392 | unsigned int normal_align; | |
4393 | unsigned int symbol_align; | |
4394 | bfd *normal_bfd; | |
4395 | bfd *common_bfd; | |
4396 | ||
3a81e825 AM |
4397 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
4398 | || h->root.type == bfd_link_hash_defweak); | |
4399 | ||
4ad4eba5 AM |
4400 | symbol_align = ffs (h->root.u.def.value) - 1; |
4401 | if (h->root.u.def.section->owner != NULL | |
4402 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
4403 | { | |
4404 | normal_align = h->root.u.def.section->alignment_power; | |
4405 | if (normal_align > symbol_align) | |
4406 | normal_align = symbol_align; | |
4407 | } | |
4408 | else | |
4409 | normal_align = symbol_align; | |
4410 | ||
4411 | if (old_alignment) | |
4412 | { | |
4413 | common_align = old_alignment; | |
4414 | common_bfd = old_bfd; | |
4415 | normal_bfd = abfd; | |
4416 | } | |
4417 | else | |
4418 | { | |
4419 | common_align = bfd_log2 (isym->st_value); | |
4420 | common_bfd = abfd; | |
4421 | normal_bfd = old_bfd; | |
4422 | } | |
4423 | ||
4424 | if (normal_align < common_align) | |
d07676f8 NC |
4425 | { |
4426 | /* PR binutils/2735 */ | |
4427 | if (normal_bfd == NULL) | |
4428 | (*_bfd_error_handler) | |
4f3fedcf AM |
4429 | (_("Warning: alignment %u of common symbol `%s' in %B is" |
4430 | " greater than the alignment (%u) of its section %A"), | |
d07676f8 NC |
4431 | common_bfd, h->root.u.def.section, |
4432 | 1 << common_align, name, 1 << normal_align); | |
4433 | else | |
4434 | (*_bfd_error_handler) | |
4435 | (_("Warning: alignment %u of symbol `%s' in %B" | |
4436 | " is smaller than %u in %B"), | |
4437 | normal_bfd, common_bfd, | |
4438 | 1 << normal_align, name, 1 << common_align); | |
4439 | } | |
4ad4eba5 AM |
4440 | } |
4441 | ||
83ad0046 | 4442 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
4443 | if (isym->st_size != 0 |
4444 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
4445 | && (definition || h->size == 0)) |
4446 | { | |
83ad0046 L |
4447 | if (h->size != 0 |
4448 | && h->size != isym->st_size | |
4449 | && ! size_change_ok) | |
4ad4eba5 | 4450 | (*_bfd_error_handler) |
d003868e AM |
4451 | (_("Warning: size of symbol `%s' changed" |
4452 | " from %lu in %B to %lu in %B"), | |
4453 | old_bfd, abfd, | |
4ad4eba5 | 4454 | name, (unsigned long) h->size, |
d003868e | 4455 | (unsigned long) isym->st_size); |
4ad4eba5 AM |
4456 | |
4457 | h->size = isym->st_size; | |
4458 | } | |
4459 | ||
4460 | /* If this is a common symbol, then we always want H->SIZE | |
4461 | to be the size of the common symbol. The code just above | |
4462 | won't fix the size if a common symbol becomes larger. We | |
4463 | don't warn about a size change here, because that is | |
4f3fedcf | 4464 | covered by --warn-common. Allow changes between different |
fcb93ecf | 4465 | function types. */ |
4ad4eba5 AM |
4466 | if (h->root.type == bfd_link_hash_common) |
4467 | h->size = h->root.u.c.size; | |
4468 | ||
4469 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
4470 | && ((definition && !new_weak) |
4471 | || (old_weak && h->root.type == bfd_link_hash_common) | |
4472 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 4473 | { |
2955ec4c L |
4474 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
4475 | ||
4476 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
4477 | symbol. */ | |
4478 | if (type == STT_GNU_IFUNC | |
4479 | && (abfd->flags & DYNAMIC) != 0) | |
4480 | type = STT_FUNC; | |
4ad4eba5 | 4481 | |
2955ec4c L |
4482 | if (h->type != type) |
4483 | { | |
4484 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
4485 | (*_bfd_error_handler) | |
4486 | (_("Warning: type of symbol `%s' changed" | |
4487 | " from %d to %d in %B"), | |
4488 | abfd, name, h->type, type); | |
4489 | ||
4490 | h->type = type; | |
4491 | } | |
4ad4eba5 AM |
4492 | } |
4493 | ||
54ac0771 | 4494 | /* Merge st_other field. */ |
b8417128 | 4495 | elf_merge_st_other (abfd, h, isym, sec, definition, dynamic); |
4ad4eba5 | 4496 | |
c3df8c14 | 4497 | /* We don't want to make debug symbol dynamic. */ |
0e1862bb L |
4498 | if (definition |
4499 | && (sec->flags & SEC_DEBUGGING) | |
4500 | && !bfd_link_relocatable (info)) | |
c3df8c14 AM |
4501 | dynsym = FALSE; |
4502 | ||
4f3fedcf AM |
4503 | /* Nor should we make plugin symbols dynamic. */ |
4504 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4505 | dynsym = FALSE; | |
4506 | ||
35fc36a8 | 4507 | if (definition) |
35399224 L |
4508 | { |
4509 | h->target_internal = isym->st_target_internal; | |
4510 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
4511 | } | |
35fc36a8 | 4512 | |
4ad4eba5 AM |
4513 | if (definition && !dynamic) |
4514 | { | |
4515 | char *p = strchr (name, ELF_VER_CHR); | |
4516 | if (p != NULL && p[1] != ELF_VER_CHR) | |
4517 | { | |
4518 | /* Queue non-default versions so that .symver x, x@FOO | |
4519 | aliases can be checked. */ | |
66eb6687 | 4520 | if (!nondeflt_vers) |
4ad4eba5 | 4521 | { |
66eb6687 AM |
4522 | amt = ((isymend - isym + 1) |
4523 | * sizeof (struct elf_link_hash_entry *)); | |
ca4be51c AM |
4524 | nondeflt_vers |
4525 | = (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
4526 | if (!nondeflt_vers) |
4527 | goto error_free_vers; | |
4ad4eba5 | 4528 | } |
66eb6687 | 4529 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
4530 | } |
4531 | } | |
4532 | ||
4533 | if (dynsym && h->dynindx == -1) | |
4534 | { | |
c152c796 | 4535 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 4536 | goto error_free_vers; |
f6e332e6 | 4537 | if (h->u.weakdef != NULL |
4ad4eba5 | 4538 | && ! new_weakdef |
f6e332e6 | 4539 | && h->u.weakdef->dynindx == -1) |
4ad4eba5 | 4540 | { |
66eb6687 | 4541 | if (!bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
4ad4eba5 AM |
4542 | goto error_free_vers; |
4543 | } | |
4544 | } | |
4545 | else if (dynsym && h->dynindx != -1) | |
4546 | /* If the symbol already has a dynamic index, but | |
4547 | visibility says it should not be visible, turn it into | |
4548 | a local symbol. */ | |
4549 | switch (ELF_ST_VISIBILITY (h->other)) | |
4550 | { | |
4551 | case STV_INTERNAL: | |
4552 | case STV_HIDDEN: | |
4553 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
4554 | dynsym = FALSE; | |
4555 | break; | |
4556 | } | |
4557 | ||
3d5bef4c | 4558 | /* Don't add DT_NEEDED for references from the dummy bfd. */ |
4ad4eba5 AM |
4559 | if (!add_needed |
4560 | && definition | |
010e5ae2 | 4561 | && ((dynsym |
ffa9430d | 4562 | && h->ref_regular_nonweak |
4f3fedcf AM |
4563 | && (old_bfd == NULL |
4564 | || (old_bfd->flags & BFD_PLUGIN) == 0)) | |
ffa9430d | 4565 | || (h->ref_dynamic_nonweak |
010e5ae2 AM |
4566 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
4567 | && !on_needed_list (elf_dt_name (abfd), htab->needed)))) | |
4ad4eba5 AM |
4568 | { |
4569 | int ret; | |
4570 | const char *soname = elf_dt_name (abfd); | |
4571 | ||
16e4ecc0 AM |
4572 | info->callbacks->minfo ("%!", soname, old_bfd, |
4573 | h->root.root.string); | |
4574 | ||
4ad4eba5 AM |
4575 | /* A symbol from a library loaded via DT_NEEDED of some |
4576 | other library is referenced by a regular object. | |
e56f61be | 4577 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
4578 | --no-add-needed is used and the reference was not |
4579 | a weak one. */ | |
4f3fedcf | 4580 | if (old_bfd != NULL |
b918acf9 | 4581 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be L |
4582 | { |
4583 | (*_bfd_error_handler) | |
3cbc5de0 | 4584 | (_("%B: undefined reference to symbol '%s'"), |
4f3fedcf | 4585 | old_bfd, name); |
ff5ac77b | 4586 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
4587 | goto error_free_vers; |
4588 | } | |
4589 | ||
a50b1753 | 4590 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
ca4be51c | 4591 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); |
a5db907e | 4592 | |
4ad4eba5 | 4593 | add_needed = TRUE; |
7e9f0867 | 4594 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
4595 | if (ret < 0) |
4596 | goto error_free_vers; | |
4597 | ||
4598 | BFD_ASSERT (ret == 0); | |
4599 | } | |
4600 | } | |
4601 | } | |
4602 | ||
66eb6687 AM |
4603 | if (extversym != NULL) |
4604 | { | |
4605 | free (extversym); | |
4606 | extversym = NULL; | |
4607 | } | |
4608 | ||
4609 | if (isymbuf != NULL) | |
4610 | { | |
4611 | free (isymbuf); | |
4612 | isymbuf = NULL; | |
4613 | } | |
4614 | ||
4615 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4616 | { | |
4617 | unsigned int i; | |
4618 | ||
4619 | /* Restore the symbol table. */ | |
f45794cb AM |
4620 | old_ent = (char *) old_tab + tabsize; |
4621 | memset (elf_sym_hashes (abfd), 0, | |
4622 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
4623 | htab->root.table.table = old_table; |
4624 | htab->root.table.size = old_size; | |
4625 | htab->root.table.count = old_count; | |
66eb6687 | 4626 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
4627 | htab->root.undefs = old_undefs; |
4628 | htab->root.undefs_tail = old_undefs_tail; | |
d45f8bda | 4629 | _bfd_elf_strtab_restore_size (htab->dynstr, old_dynstr_size); |
66eb6687 AM |
4630 | for (i = 0; i < htab->root.table.size; i++) |
4631 | { | |
4632 | struct bfd_hash_entry *p; | |
4633 | struct elf_link_hash_entry *h; | |
3e0882af L |
4634 | bfd_size_type size; |
4635 | unsigned int alignment_power; | |
66eb6687 AM |
4636 | |
4637 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4638 | { | |
4639 | h = (struct elf_link_hash_entry *) p; | |
2de92251 AM |
4640 | if (h->root.type == bfd_link_hash_warning) |
4641 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
a4542f1b AM |
4642 | if (h->dynindx >= old_dynsymcount |
4643 | && h->dynstr_index < old_dynstr_size) | |
66eb6687 | 4644 | _bfd_elf_strtab_delref (htab->dynstr, h->dynstr_index); |
2de92251 | 4645 | |
3e0882af L |
4646 | /* Preserve the maximum alignment and size for common |
4647 | symbols even if this dynamic lib isn't on DT_NEEDED | |
a4542f1b | 4648 | since it can still be loaded at run time by another |
3e0882af L |
4649 | dynamic lib. */ |
4650 | if (h->root.type == bfd_link_hash_common) | |
4651 | { | |
4652 | size = h->root.u.c.size; | |
4653 | alignment_power = h->root.u.c.p->alignment_power; | |
4654 | } | |
4655 | else | |
4656 | { | |
4657 | size = 0; | |
4658 | alignment_power = 0; | |
4659 | } | |
66eb6687 AM |
4660 | memcpy (p, old_ent, htab->root.table.entsize); |
4661 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4662 | h = (struct elf_link_hash_entry *) p; |
4663 | if (h->root.type == bfd_link_hash_warning) | |
4664 | { | |
4665 | memcpy (h->root.u.i.link, old_ent, htab->root.table.entsize); | |
4666 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
a4542f1b | 4667 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
2de92251 | 4668 | } |
a4542f1b | 4669 | if (h->root.type == bfd_link_hash_common) |
3e0882af L |
4670 | { |
4671 | if (size > h->root.u.c.size) | |
4672 | h->root.u.c.size = size; | |
4673 | if (alignment_power > h->root.u.c.p->alignment_power) | |
4674 | h->root.u.c.p->alignment_power = alignment_power; | |
4675 | } | |
66eb6687 AM |
4676 | } |
4677 | } | |
4678 | ||
5061a885 AM |
4679 | /* Make a special call to the linker "notice" function to |
4680 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 4681 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 4682 | goto error_free_vers; |
5061a885 | 4683 | |
66eb6687 AM |
4684 | free (old_tab); |
4685 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
4686 | alloc_mark); | |
4687 | if (nondeflt_vers != NULL) | |
4688 | free (nondeflt_vers); | |
4689 | return TRUE; | |
4690 | } | |
2de92251 | 4691 | |
66eb6687 AM |
4692 | if (old_tab != NULL) |
4693 | { | |
e5034e59 | 4694 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 4695 | goto error_free_vers; |
66eb6687 AM |
4696 | free (old_tab); |
4697 | old_tab = NULL; | |
4698 | } | |
4699 | ||
c6e8a9a8 L |
4700 | /* Now that all the symbols from this input file are created, if |
4701 | not performing a relocatable link, handle .symver foo, foo@BAR | |
4702 | such that any relocs against foo become foo@BAR. */ | |
0e1862bb | 4703 | if (!bfd_link_relocatable (info) && nondeflt_vers != NULL) |
4ad4eba5 AM |
4704 | { |
4705 | bfd_size_type cnt, symidx; | |
4706 | ||
4707 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
4708 | { | |
4709 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
4710 | char *shortname, *p; | |
4711 | ||
4712 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
4713 | if (p == NULL | |
4714 | || (h->root.type != bfd_link_hash_defined | |
4715 | && h->root.type != bfd_link_hash_defweak)) | |
4716 | continue; | |
4717 | ||
4718 | amt = p - h->root.root.string; | |
a50b1753 | 4719 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
4720 | if (!shortname) |
4721 | goto error_free_vers; | |
4ad4eba5 AM |
4722 | memcpy (shortname, h->root.root.string, amt); |
4723 | shortname[amt] = '\0'; | |
4724 | ||
4725 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 4726 | bfd_link_hash_lookup (&htab->root, shortname, |
4ad4eba5 AM |
4727 | FALSE, FALSE, FALSE); |
4728 | if (hi != NULL | |
4729 | && hi->root.type == h->root.type | |
4730 | && hi->root.u.def.value == h->root.u.def.value | |
4731 | && hi->root.u.def.section == h->root.u.def.section) | |
4732 | { | |
4733 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
4734 | hi->root.type = bfd_link_hash_indirect; | |
4735 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 4736 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
4737 | sym_hash = elf_sym_hashes (abfd); |
4738 | if (sym_hash) | |
4739 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
4740 | if (sym_hash[symidx] == hi) | |
4741 | { | |
4742 | sym_hash[symidx] = h; | |
4743 | break; | |
4744 | } | |
4745 | } | |
4746 | free (shortname); | |
4747 | } | |
4748 | free (nondeflt_vers); | |
4749 | nondeflt_vers = NULL; | |
4750 | } | |
4751 | ||
4ad4eba5 AM |
4752 | /* Now set the weakdefs field correctly for all the weak defined |
4753 | symbols we found. The only way to do this is to search all the | |
4754 | symbols. Since we only need the information for non functions in | |
4755 | dynamic objects, that's the only time we actually put anything on | |
4756 | the list WEAKS. We need this information so that if a regular | |
4757 | object refers to a symbol defined weakly in a dynamic object, the | |
4758 | real symbol in the dynamic object is also put in the dynamic | |
4759 | symbols; we also must arrange for both symbols to point to the | |
4760 | same memory location. We could handle the general case of symbol | |
4761 | aliasing, but a general symbol alias can only be generated in | |
4762 | assembler code, handling it correctly would be very time | |
4763 | consuming, and other ELF linkers don't handle general aliasing | |
4764 | either. */ | |
4765 | if (weaks != NULL) | |
4766 | { | |
4767 | struct elf_link_hash_entry **hpp; | |
4768 | struct elf_link_hash_entry **hppend; | |
4769 | struct elf_link_hash_entry **sorted_sym_hash; | |
4770 | struct elf_link_hash_entry *h; | |
4771 | size_t sym_count; | |
4772 | ||
4773 | /* Since we have to search the whole symbol list for each weak | |
4774 | defined symbol, search time for N weak defined symbols will be | |
4775 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
4776 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
a50b1753 | 4777 | sorted_sym_hash = (struct elf_link_hash_entry **) bfd_malloc (amt); |
4ad4eba5 AM |
4778 | if (sorted_sym_hash == NULL) |
4779 | goto error_return; | |
4780 | sym_hash = sorted_sym_hash; | |
4781 | hpp = elf_sym_hashes (abfd); | |
4782 | hppend = hpp + extsymcount; | |
4783 | sym_count = 0; | |
4784 | for (; hpp < hppend; hpp++) | |
4785 | { | |
4786 | h = *hpp; | |
4787 | if (h != NULL | |
4788 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 4789 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
4790 | { |
4791 | *sym_hash = h; | |
4792 | sym_hash++; | |
4793 | sym_count++; | |
4794 | } | |
4795 | } | |
4796 | ||
4797 | qsort (sorted_sym_hash, sym_count, | |
4798 | sizeof (struct elf_link_hash_entry *), | |
4799 | elf_sort_symbol); | |
4800 | ||
4801 | while (weaks != NULL) | |
4802 | { | |
4803 | struct elf_link_hash_entry *hlook; | |
4804 | asection *slook; | |
4805 | bfd_vma vlook; | |
ed54588d | 4806 | size_t i, j, idx = 0; |
4ad4eba5 AM |
4807 | |
4808 | hlook = weaks; | |
f6e332e6 AM |
4809 | weaks = hlook->u.weakdef; |
4810 | hlook->u.weakdef = NULL; | |
4ad4eba5 AM |
4811 | |
4812 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
4813 | || hlook->root.type == bfd_link_hash_defweak | |
4814 | || hlook->root.type == bfd_link_hash_common | |
4815 | || hlook->root.type == bfd_link_hash_indirect); | |
4816 | slook = hlook->root.u.def.section; | |
4817 | vlook = hlook->root.u.def.value; | |
4818 | ||
4ad4eba5 AM |
4819 | i = 0; |
4820 | j = sym_count; | |
14160578 | 4821 | while (i != j) |
4ad4eba5 AM |
4822 | { |
4823 | bfd_signed_vma vdiff; | |
4824 | idx = (i + j) / 2; | |
14160578 | 4825 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
4826 | vdiff = vlook - h->root.u.def.value; |
4827 | if (vdiff < 0) | |
4828 | j = idx; | |
4829 | else if (vdiff > 0) | |
4830 | i = idx + 1; | |
4831 | else | |
4832 | { | |
d3435ae8 | 4833 | int sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
4834 | if (sdiff < 0) |
4835 | j = idx; | |
4836 | else if (sdiff > 0) | |
4837 | i = idx + 1; | |
4838 | else | |
14160578 | 4839 | break; |
4ad4eba5 AM |
4840 | } |
4841 | } | |
4842 | ||
4843 | /* We didn't find a value/section match. */ | |
14160578 | 4844 | if (i == j) |
4ad4eba5 AM |
4845 | continue; |
4846 | ||
14160578 AM |
4847 | /* With multiple aliases, or when the weak symbol is already |
4848 | strongly defined, we have multiple matching symbols and | |
4849 | the binary search above may land on any of them. Step | |
4850 | one past the matching symbol(s). */ | |
4851 | while (++idx != j) | |
4852 | { | |
4853 | h = sorted_sym_hash[idx]; | |
4854 | if (h->root.u.def.section != slook | |
4855 | || h->root.u.def.value != vlook) | |
4856 | break; | |
4857 | } | |
4858 | ||
4859 | /* Now look back over the aliases. Since we sorted by size | |
4860 | as well as value and section, we'll choose the one with | |
4861 | the largest size. */ | |
4862 | while (idx-- != i) | |
4ad4eba5 | 4863 | { |
14160578 | 4864 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
4865 | |
4866 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
4867 | if (h->root.u.def.section != slook |
4868 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
4869 | break; |
4870 | else if (h != hlook) | |
4871 | { | |
f6e332e6 | 4872 | hlook->u.weakdef = h; |
4ad4eba5 AM |
4873 | |
4874 | /* If the weak definition is in the list of dynamic | |
4875 | symbols, make sure the real definition is put | |
4876 | there as well. */ | |
4877 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
4878 | { | |
c152c796 | 4879 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
4880 | { |
4881 | err_free_sym_hash: | |
4882 | free (sorted_sym_hash); | |
4883 | goto error_return; | |
4884 | } | |
4ad4eba5 AM |
4885 | } |
4886 | ||
4887 | /* If the real definition is in the list of dynamic | |
4888 | symbols, make sure the weak definition is put | |
4889 | there as well. If we don't do this, then the | |
4890 | dynamic loader might not merge the entries for the | |
4891 | real definition and the weak definition. */ | |
4892 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
4893 | { | |
c152c796 | 4894 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 4895 | goto err_free_sym_hash; |
4ad4eba5 AM |
4896 | } |
4897 | break; | |
4898 | } | |
4899 | } | |
4900 | } | |
4901 | ||
4902 | free (sorted_sym_hash); | |
4903 | } | |
4904 | ||
33177bb1 AM |
4905 | if (bed->check_directives |
4906 | && !(*bed->check_directives) (abfd, info)) | |
4907 | return FALSE; | |
85fbca6a | 4908 | |
4ad4eba5 AM |
4909 | /* If this object is the same format as the output object, and it is |
4910 | not a shared library, then let the backend look through the | |
4911 | relocs. | |
4912 | ||
4913 | This is required to build global offset table entries and to | |
4914 | arrange for dynamic relocs. It is not required for the | |
4915 | particular common case of linking non PIC code, even when linking | |
4916 | against shared libraries, but unfortunately there is no way of | |
4917 | knowing whether an object file has been compiled PIC or not. | |
4918 | Looking through the relocs is not particularly time consuming. | |
4919 | The problem is that we must either (1) keep the relocs in memory, | |
4920 | which causes the linker to require additional runtime memory or | |
4921 | (2) read the relocs twice from the input file, which wastes time. | |
4922 | This would be a good case for using mmap. | |
4923 | ||
4924 | I have no idea how to handle linking PIC code into a file of a | |
4925 | different format. It probably can't be done. */ | |
4ad4eba5 | 4926 | if (! dynamic |
66eb6687 | 4927 | && is_elf_hash_table (htab) |
13285a1b | 4928 | && bed->check_relocs != NULL |
39334f3a | 4929 | && elf_object_id (abfd) == elf_hash_table_id (htab) |
f13a99db | 4930 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) |
4ad4eba5 AM |
4931 | { |
4932 | asection *o; | |
4933 | ||
4934 | for (o = abfd->sections; o != NULL; o = o->next) | |
4935 | { | |
4936 | Elf_Internal_Rela *internal_relocs; | |
4937 | bfd_boolean ok; | |
4938 | ||
4939 | if ((o->flags & SEC_RELOC) == 0 | |
4940 | || o->reloc_count == 0 | |
4941 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
4942 | && (o->flags & SEC_DEBUGGING) != 0) | |
4943 | || bfd_is_abs_section (o->output_section)) | |
4944 | continue; | |
4945 | ||
4946 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
4947 | info->keep_memory); | |
4948 | if (internal_relocs == NULL) | |
4949 | goto error_return; | |
4950 | ||
66eb6687 | 4951 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); |
4ad4eba5 AM |
4952 | |
4953 | if (elf_section_data (o)->relocs != internal_relocs) | |
4954 | free (internal_relocs); | |
4955 | ||
4956 | if (! ok) | |
4957 | goto error_return; | |
4958 | } | |
4959 | } | |
4960 | ||
4961 | /* If this is a non-traditional link, try to optimize the handling | |
4962 | of the .stab/.stabstr sections. */ | |
4963 | if (! dynamic | |
4964 | && ! info->traditional_format | |
66eb6687 | 4965 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
4966 | && (info->strip != strip_all && info->strip != strip_debugger)) |
4967 | { | |
4968 | asection *stabstr; | |
4969 | ||
4970 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
4971 | if (stabstr != NULL) | |
4972 | { | |
4973 | bfd_size_type string_offset = 0; | |
4974 | asection *stab; | |
4975 | ||
4976 | for (stab = abfd->sections; stab; stab = stab->next) | |
0112cd26 | 4977 | if (CONST_STRNEQ (stab->name, ".stab") |
4ad4eba5 AM |
4978 | && (!stab->name[5] || |
4979 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
4980 | && (stab->flags & SEC_MERGE) == 0 | |
4981 | && !bfd_is_abs_section (stab->output_section)) | |
4982 | { | |
4983 | struct bfd_elf_section_data *secdata; | |
4984 | ||
4985 | secdata = elf_section_data (stab); | |
66eb6687 AM |
4986 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
4987 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
4988 | &string_offset)) |
4989 | goto error_return; | |
4990 | if (secdata->sec_info) | |
dbaa2011 | 4991 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
4992 | } |
4993 | } | |
4994 | } | |
4995 | ||
66eb6687 | 4996 | if (is_elf_hash_table (htab) && add_needed) |
4ad4eba5 AM |
4997 | { |
4998 | /* Add this bfd to the loaded list. */ | |
4999 | struct elf_link_loaded_list *n; | |
5000 | ||
ca4be51c | 5001 | n = (struct elf_link_loaded_list *) bfd_alloc (abfd, sizeof (*n)); |
4ad4eba5 AM |
5002 | if (n == NULL) |
5003 | goto error_return; | |
5004 | n->abfd = abfd; | |
66eb6687 AM |
5005 | n->next = htab->loaded; |
5006 | htab->loaded = n; | |
4ad4eba5 AM |
5007 | } |
5008 | ||
5009 | return TRUE; | |
5010 | ||
5011 | error_free_vers: | |
66eb6687 AM |
5012 | if (old_tab != NULL) |
5013 | free (old_tab); | |
4ad4eba5 AM |
5014 | if (nondeflt_vers != NULL) |
5015 | free (nondeflt_vers); | |
5016 | if (extversym != NULL) | |
5017 | free (extversym); | |
5018 | error_free_sym: | |
5019 | if (isymbuf != NULL) | |
5020 | free (isymbuf); | |
5021 | error_return: | |
5022 | return FALSE; | |
5023 | } | |
5024 | ||
8387904d AM |
5025 | /* Return the linker hash table entry of a symbol that might be |
5026 | satisfied by an archive symbol. Return -1 on error. */ | |
5027 | ||
5028 | struct elf_link_hash_entry * | |
5029 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
5030 | struct bfd_link_info *info, | |
5031 | const char *name) | |
5032 | { | |
5033 | struct elf_link_hash_entry *h; | |
5034 | char *p, *copy; | |
5035 | size_t len, first; | |
5036 | ||
2a41f396 | 5037 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, TRUE); |
8387904d AM |
5038 | if (h != NULL) |
5039 | return h; | |
5040 | ||
5041 | /* If this is a default version (the name contains @@), look up the | |
5042 | symbol again with only one `@' as well as without the version. | |
5043 | The effect is that references to the symbol with and without the | |
5044 | version will be matched by the default symbol in the archive. */ | |
5045 | ||
5046 | p = strchr (name, ELF_VER_CHR); | |
5047 | if (p == NULL || p[1] != ELF_VER_CHR) | |
5048 | return h; | |
5049 | ||
5050 | /* First check with only one `@'. */ | |
5051 | len = strlen (name); | |
a50b1753 | 5052 | copy = (char *) bfd_alloc (abfd, len); |
8387904d AM |
5053 | if (copy == NULL) |
5054 | return (struct elf_link_hash_entry *) 0 - 1; | |
5055 | ||
5056 | first = p - name + 1; | |
5057 | memcpy (copy, name, first); | |
5058 | memcpy (copy + first, name + first + 1, len - first); | |
5059 | ||
2a41f396 | 5060 | h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, TRUE); |
8387904d AM |
5061 | if (h == NULL) |
5062 | { | |
5063 | /* We also need to check references to the symbol without the | |
5064 | version. */ | |
5065 | copy[first - 1] = '\0'; | |
5066 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
2a41f396 | 5067 | FALSE, FALSE, TRUE); |
8387904d AM |
5068 | } |
5069 | ||
5070 | bfd_release (abfd, copy); | |
5071 | return h; | |
5072 | } | |
5073 | ||
0ad989f9 | 5074 | /* Add symbols from an ELF archive file to the linker hash table. We |
13e570f8 AM |
5075 | don't use _bfd_generic_link_add_archive_symbols because we need to |
5076 | handle versioned symbols. | |
0ad989f9 L |
5077 | |
5078 | Fortunately, ELF archive handling is simpler than that done by | |
5079 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
5080 | oddities. In ELF, if we find a symbol in the archive map, and the | |
5081 | symbol is currently undefined, we know that we must pull in that | |
5082 | object file. | |
5083 | ||
5084 | Unfortunately, we do have to make multiple passes over the symbol | |
5085 | table until nothing further is resolved. */ | |
5086 | ||
4ad4eba5 AM |
5087 | static bfd_boolean |
5088 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) | |
0ad989f9 L |
5089 | { |
5090 | symindex c; | |
13e570f8 | 5091 | unsigned char *included = NULL; |
0ad989f9 L |
5092 | carsym *symdefs; |
5093 | bfd_boolean loop; | |
5094 | bfd_size_type amt; | |
8387904d AM |
5095 | const struct elf_backend_data *bed; |
5096 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
5097 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
5098 | |
5099 | if (! bfd_has_map (abfd)) | |
5100 | { | |
5101 | /* An empty archive is a special case. */ | |
5102 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
5103 | return TRUE; | |
5104 | bfd_set_error (bfd_error_no_armap); | |
5105 | return FALSE; | |
5106 | } | |
5107 | ||
5108 | /* Keep track of all symbols we know to be already defined, and all | |
5109 | files we know to be already included. This is to speed up the | |
5110 | second and subsequent passes. */ | |
5111 | c = bfd_ardata (abfd)->symdef_count; | |
5112 | if (c == 0) | |
5113 | return TRUE; | |
5114 | amt = c; | |
13e570f8 AM |
5115 | amt *= sizeof (*included); |
5116 | included = (unsigned char *) bfd_zmalloc (amt); | |
5117 | if (included == NULL) | |
5118 | return FALSE; | |
0ad989f9 L |
5119 | |
5120 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5121 | bed = get_elf_backend_data (abfd); |
5122 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5123 | |
5124 | do | |
5125 | { | |
5126 | file_ptr last; | |
5127 | symindex i; | |
5128 | carsym *symdef; | |
5129 | carsym *symdefend; | |
5130 | ||
5131 | loop = FALSE; | |
5132 | last = -1; | |
5133 | ||
5134 | symdef = symdefs; | |
5135 | symdefend = symdef + c; | |
5136 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5137 | { | |
5138 | struct elf_link_hash_entry *h; | |
5139 | bfd *element; | |
5140 | struct bfd_link_hash_entry *undefs_tail; | |
5141 | symindex mark; | |
5142 | ||
13e570f8 | 5143 | if (included[i]) |
0ad989f9 L |
5144 | continue; |
5145 | if (symdef->file_offset == last) | |
5146 | { | |
5147 | included[i] = TRUE; | |
5148 | continue; | |
5149 | } | |
5150 | ||
8387904d AM |
5151 | h = archive_symbol_lookup (abfd, info, symdef->name); |
5152 | if (h == (struct elf_link_hash_entry *) 0 - 1) | |
5153 | goto error_return; | |
0ad989f9 L |
5154 | |
5155 | if (h == NULL) | |
5156 | continue; | |
5157 | ||
5158 | if (h->root.type == bfd_link_hash_common) | |
5159 | { | |
5160 | /* We currently have a common symbol. The archive map contains | |
5161 | a reference to this symbol, so we may want to include it. We | |
5162 | only want to include it however, if this archive element | |
5163 | contains a definition of the symbol, not just another common | |
5164 | declaration of it. | |
5165 | ||
5166 | Unfortunately some archivers (including GNU ar) will put | |
5167 | declarations of common symbols into their archive maps, as | |
5168 | well as real definitions, so we cannot just go by the archive | |
5169 | map alone. Instead we must read in the element's symbol | |
5170 | table and check that to see what kind of symbol definition | |
5171 | this is. */ | |
5172 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5173 | continue; | |
5174 | } | |
5175 | else if (h->root.type != bfd_link_hash_undefined) | |
5176 | { | |
5177 | if (h->root.type != bfd_link_hash_undefweak) | |
13e570f8 AM |
5178 | /* Symbol must be defined. Don't check it again. */ |
5179 | included[i] = TRUE; | |
0ad989f9 L |
5180 | continue; |
5181 | } | |
5182 | ||
5183 | /* We need to include this archive member. */ | |
5184 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5185 | if (element == NULL) | |
5186 | goto error_return; | |
5187 | ||
5188 | if (! bfd_check_format (element, bfd_object)) | |
5189 | goto error_return; | |
5190 | ||
0ad989f9 L |
5191 | undefs_tail = info->hash->undefs_tail; |
5192 | ||
0e144ba7 AM |
5193 | if (!(*info->callbacks |
5194 | ->add_archive_element) (info, element, symdef->name, &element)) | |
0ad989f9 | 5195 | goto error_return; |
0e144ba7 | 5196 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5197 | goto error_return; |
5198 | ||
5199 | /* If there are any new undefined symbols, we need to make | |
5200 | another pass through the archive in order to see whether | |
5201 | they can be defined. FIXME: This isn't perfect, because | |
5202 | common symbols wind up on undefs_tail and because an | |
5203 | undefined symbol which is defined later on in this pass | |
5204 | does not require another pass. This isn't a bug, but it | |
5205 | does make the code less efficient than it could be. */ | |
5206 | if (undefs_tail != info->hash->undefs_tail) | |
5207 | loop = TRUE; | |
5208 | ||
5209 | /* Look backward to mark all symbols from this object file | |
5210 | which we have already seen in this pass. */ | |
5211 | mark = i; | |
5212 | do | |
5213 | { | |
5214 | included[mark] = TRUE; | |
5215 | if (mark == 0) | |
5216 | break; | |
5217 | --mark; | |
5218 | } | |
5219 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5220 | ||
5221 | /* We mark subsequent symbols from this object file as we go | |
5222 | on through the loop. */ | |
5223 | last = symdef->file_offset; | |
5224 | } | |
5225 | } | |
5226 | while (loop); | |
5227 | ||
0ad989f9 L |
5228 | free (included); |
5229 | ||
5230 | return TRUE; | |
5231 | ||
5232 | error_return: | |
0ad989f9 L |
5233 | if (included != NULL) |
5234 | free (included); | |
5235 | return FALSE; | |
5236 | } | |
4ad4eba5 AM |
5237 | |
5238 | /* Given an ELF BFD, add symbols to the global hash table as | |
5239 | appropriate. */ | |
5240 | ||
5241 | bfd_boolean | |
5242 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) | |
5243 | { | |
5244 | switch (bfd_get_format (abfd)) | |
5245 | { | |
5246 | case bfd_object: | |
5247 | return elf_link_add_object_symbols (abfd, info); | |
5248 | case bfd_archive: | |
5249 | return elf_link_add_archive_symbols (abfd, info); | |
5250 | default: | |
5251 | bfd_set_error (bfd_error_wrong_format); | |
5252 | return FALSE; | |
5253 | } | |
5254 | } | |
5a580b3a | 5255 | \f |
14b1c01e AM |
5256 | struct hash_codes_info |
5257 | { | |
5258 | unsigned long *hashcodes; | |
5259 | bfd_boolean error; | |
5260 | }; | |
a0c8462f | 5261 | |
5a580b3a AM |
5262 | /* This function will be called though elf_link_hash_traverse to store |
5263 | all hash value of the exported symbols in an array. */ | |
5264 | ||
5265 | static bfd_boolean | |
5266 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5267 | { | |
a50b1753 | 5268 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a | 5269 | const char *name; |
5a580b3a AM |
5270 | unsigned long ha; |
5271 | char *alc = NULL; | |
5272 | ||
5a580b3a AM |
5273 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5274 | if (h->dynindx == -1) | |
5275 | return TRUE; | |
5276 | ||
5277 | name = h->root.root.string; | |
422f1182 | 5278 | if (h->versioned >= versioned) |
5a580b3a | 5279 | { |
422f1182 L |
5280 | char *p = strchr (name, ELF_VER_CHR); |
5281 | if (p != NULL) | |
14b1c01e | 5282 | { |
422f1182 L |
5283 | alc = (char *) bfd_malloc (p - name + 1); |
5284 | if (alc == NULL) | |
5285 | { | |
5286 | inf->error = TRUE; | |
5287 | return FALSE; | |
5288 | } | |
5289 | memcpy (alc, name, p - name); | |
5290 | alc[p - name] = '\0'; | |
5291 | name = alc; | |
14b1c01e | 5292 | } |
5a580b3a AM |
5293 | } |
5294 | ||
5295 | /* Compute the hash value. */ | |
5296 | ha = bfd_elf_hash (name); | |
5297 | ||
5298 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 5299 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
5300 | |
5301 | /* And store it in the struct so that we can put it in the hash table | |
5302 | later. */ | |
f6e332e6 | 5303 | h->u.elf_hash_value = ha; |
5a580b3a AM |
5304 | |
5305 | if (alc != NULL) | |
5306 | free (alc); | |
5307 | ||
5308 | return TRUE; | |
5309 | } | |
5310 | ||
fdc90cb4 JJ |
5311 | struct collect_gnu_hash_codes |
5312 | { | |
5313 | bfd *output_bfd; | |
5314 | const struct elf_backend_data *bed; | |
5315 | unsigned long int nsyms; | |
5316 | unsigned long int maskbits; | |
5317 | unsigned long int *hashcodes; | |
5318 | unsigned long int *hashval; | |
5319 | unsigned long int *indx; | |
5320 | unsigned long int *counts; | |
5321 | bfd_vma *bitmask; | |
5322 | bfd_byte *contents; | |
5323 | long int min_dynindx; | |
5324 | unsigned long int bucketcount; | |
5325 | unsigned long int symindx; | |
5326 | long int local_indx; | |
5327 | long int shift1, shift2; | |
5328 | unsigned long int mask; | |
14b1c01e | 5329 | bfd_boolean error; |
fdc90cb4 JJ |
5330 | }; |
5331 | ||
5332 | /* This function will be called though elf_link_hash_traverse to store | |
5333 | all hash value of the exported symbols in an array. */ | |
5334 | ||
5335 | static bfd_boolean | |
5336 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5337 | { | |
a50b1753 | 5338 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 | 5339 | const char *name; |
fdc90cb4 JJ |
5340 | unsigned long ha; |
5341 | char *alc = NULL; | |
5342 | ||
fdc90cb4 JJ |
5343 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5344 | if (h->dynindx == -1) | |
5345 | return TRUE; | |
5346 | ||
5347 | /* Ignore also local symbols and undefined symbols. */ | |
5348 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5349 | return TRUE; | |
5350 | ||
5351 | name = h->root.root.string; | |
422f1182 | 5352 | if (h->versioned >= versioned) |
fdc90cb4 | 5353 | { |
422f1182 L |
5354 | char *p = strchr (name, ELF_VER_CHR); |
5355 | if (p != NULL) | |
14b1c01e | 5356 | { |
422f1182 L |
5357 | alc = (char *) bfd_malloc (p - name + 1); |
5358 | if (alc == NULL) | |
5359 | { | |
5360 | s->error = TRUE; | |
5361 | return FALSE; | |
5362 | } | |
5363 | memcpy (alc, name, p - name); | |
5364 | alc[p - name] = '\0'; | |
5365 | name = alc; | |
14b1c01e | 5366 | } |
fdc90cb4 JJ |
5367 | } |
5368 | ||
5369 | /* Compute the hash value. */ | |
5370 | ha = bfd_elf_gnu_hash (name); | |
5371 | ||
5372 | /* Store the found hash value in the array for compute_bucket_count, | |
5373 | and also for .dynsym reordering purposes. */ | |
5374 | s->hashcodes[s->nsyms] = ha; | |
5375 | s->hashval[h->dynindx] = ha; | |
5376 | ++s->nsyms; | |
5377 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
5378 | s->min_dynindx = h->dynindx; | |
5379 | ||
5380 | if (alc != NULL) | |
5381 | free (alc); | |
5382 | ||
5383 | return TRUE; | |
5384 | } | |
5385 | ||
5386 | /* This function will be called though elf_link_hash_traverse to do | |
5387 | final dynaminc symbol renumbering. */ | |
5388 | ||
5389 | static bfd_boolean | |
5390 | elf_renumber_gnu_hash_syms (struct elf_link_hash_entry *h, void *data) | |
5391 | { | |
a50b1753 | 5392 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5393 | unsigned long int bucket; |
5394 | unsigned long int val; | |
5395 | ||
fdc90cb4 JJ |
5396 | /* Ignore indirect symbols. */ |
5397 | if (h->dynindx == -1) | |
5398 | return TRUE; | |
5399 | ||
5400 | /* Ignore also local symbols and undefined symbols. */ | |
5401 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5402 | { | |
5403 | if (h->dynindx >= s->min_dynindx) | |
5404 | h->dynindx = s->local_indx++; | |
5405 | return TRUE; | |
5406 | } | |
5407 | ||
5408 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
5409 | val = (s->hashval[h->dynindx] >> s->shift1) | |
5410 | & ((s->maskbits >> s->shift1) - 1); | |
5411 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
5412 | s->bitmask[val] | |
5413 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
5414 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
5415 | if (s->counts[bucket] == 1) | |
5416 | /* Last element terminates the chain. */ | |
5417 | val |= 1; | |
5418 | bfd_put_32 (s->output_bfd, val, | |
5419 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
5420 | --s->counts[bucket]; | |
5421 | h->dynindx = s->indx[bucket]++; | |
5422 | return TRUE; | |
5423 | } | |
5424 | ||
5425 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
5426 | ||
5427 | bfd_boolean | |
5428 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) | |
5429 | { | |
5430 | return !(h->forced_local | |
5431 | || h->root.type == bfd_link_hash_undefined | |
5432 | || h->root.type == bfd_link_hash_undefweak | |
5433 | || ((h->root.type == bfd_link_hash_defined | |
5434 | || h->root.type == bfd_link_hash_defweak) | |
5435 | && h->root.u.def.section->output_section == NULL)); | |
5436 | } | |
5437 | ||
5a580b3a AM |
5438 | /* Array used to determine the number of hash table buckets to use |
5439 | based on the number of symbols there are. If there are fewer than | |
5440 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
5441 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
5442 | than 32771 buckets. */ | |
5443 | ||
5444 | static const size_t elf_buckets[] = | |
5445 | { | |
5446 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
5447 | 16411, 32771, 0 | |
5448 | }; | |
5449 | ||
5450 | /* Compute bucket count for hashing table. We do not use a static set | |
5451 | of possible tables sizes anymore. Instead we determine for all | |
5452 | possible reasonable sizes of the table the outcome (i.e., the | |
5453 | number of collisions etc) and choose the best solution. The | |
5454 | weighting functions are not too simple to allow the table to grow | |
5455 | without bounds. Instead one of the weighting factors is the size. | |
5456 | Therefore the result is always a good payoff between few collisions | |
5457 | (= short chain lengths) and table size. */ | |
5458 | static size_t | |
b20dd2ce | 5459 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
5460 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
5461 | unsigned long int nsyms, | |
5462 | int gnu_hash) | |
5a580b3a | 5463 | { |
5a580b3a | 5464 | size_t best_size = 0; |
5a580b3a | 5465 | unsigned long int i; |
5a580b3a | 5466 | |
5a580b3a AM |
5467 | /* We have a problem here. The following code to optimize the table |
5468 | size requires an integer type with more the 32 bits. If | |
5469 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
5470 | #ifdef BFD_HOST_U_64_BIT | |
5471 | if (info->optimize) | |
5472 | { | |
5a580b3a AM |
5473 | size_t minsize; |
5474 | size_t maxsize; | |
5475 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 5476 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 5477 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 5478 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 5479 | unsigned long int *counts; |
d40f3da9 | 5480 | bfd_size_type amt; |
0883b6e0 | 5481 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
5482 | |
5483 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
5484 | that the hashing table must at least have NSYMS/4 and at most | |
5485 | 2*NSYMS buckets. */ | |
5486 | minsize = nsyms / 4; | |
5487 | if (minsize == 0) | |
5488 | minsize = 1; | |
5489 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
5490 | if (gnu_hash) |
5491 | { | |
5492 | if (minsize < 2) | |
5493 | minsize = 2; | |
5494 | if ((best_size & 31) == 0) | |
5495 | ++best_size; | |
5496 | } | |
5a580b3a AM |
5497 | |
5498 | /* Create array where we count the collisions in. We must use bfd_malloc | |
5499 | since the size could be large. */ | |
5500 | amt = maxsize; | |
5501 | amt *= sizeof (unsigned long int); | |
a50b1753 | 5502 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 5503 | if (counts == NULL) |
fdc90cb4 | 5504 | return 0; |
5a580b3a AM |
5505 | |
5506 | /* Compute the "optimal" size for the hash table. The criteria is a | |
5507 | minimal chain length. The minor criteria is (of course) the size | |
5508 | of the table. */ | |
5509 | for (i = minsize; i < maxsize; ++i) | |
5510 | { | |
5511 | /* Walk through the array of hashcodes and count the collisions. */ | |
5512 | BFD_HOST_U_64_BIT max; | |
5513 | unsigned long int j; | |
5514 | unsigned long int fact; | |
5515 | ||
fdc90cb4 JJ |
5516 | if (gnu_hash && (i & 31) == 0) |
5517 | continue; | |
5518 | ||
5a580b3a AM |
5519 | memset (counts, '\0', i * sizeof (unsigned long int)); |
5520 | ||
5521 | /* Determine how often each hash bucket is used. */ | |
5522 | for (j = 0; j < nsyms; ++j) | |
5523 | ++counts[hashcodes[j] % i]; | |
5524 | ||
5525 | /* For the weight function we need some information about the | |
5526 | pagesize on the target. This is information need not be 100% | |
5527 | accurate. Since this information is not available (so far) we | |
5528 | define it here to a reasonable default value. If it is crucial | |
5529 | to have a better value some day simply define this value. */ | |
5530 | # ifndef BFD_TARGET_PAGESIZE | |
5531 | # define BFD_TARGET_PAGESIZE (4096) | |
5532 | # endif | |
5533 | ||
fdc90cb4 JJ |
5534 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
5535 | and the chains. */ | |
5536 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
5537 | |
5538 | # if 1 | |
5539 | /* Variant 1: optimize for short chains. We add the squares | |
5540 | of all the chain lengths (which favors many small chain | |
5541 | over a few long chains). */ | |
5542 | for (j = 0; j < i; ++j) | |
5543 | max += counts[j] * counts[j]; | |
5544 | ||
5545 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 5546 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5547 | max *= fact * fact; |
5548 | # else | |
5549 | /* Variant 2: Optimize a lot more for small table. Here we | |
5550 | also add squares of the size but we also add penalties for | |
5551 | empty slots (the +1 term). */ | |
5552 | for (j = 0; j < i; ++j) | |
5553 | max += (1 + counts[j]) * (1 + counts[j]); | |
5554 | ||
5555 | /* The overall size of the table is considered, but not as | |
5556 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 5557 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5558 | max *= fact; |
5559 | # endif | |
5560 | ||
5561 | /* Compare with current best results. */ | |
5562 | if (max < best_chlen) | |
5563 | { | |
5564 | best_chlen = max; | |
5565 | best_size = i; | |
ca4be51c | 5566 | no_improvement_count = 0; |
5a580b3a | 5567 | } |
0883b6e0 NC |
5568 | /* PR 11843: Avoid futile long searches for the best bucket size |
5569 | when there are a large number of symbols. */ | |
5570 | else if (++no_improvement_count == 100) | |
5571 | break; | |
5a580b3a AM |
5572 | } |
5573 | ||
5574 | free (counts); | |
5575 | } | |
5576 | else | |
5577 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
5578 | { | |
5579 | /* This is the fallback solution if no 64bit type is available or if we | |
5580 | are not supposed to spend much time on optimizations. We select the | |
5581 | bucket count using a fixed set of numbers. */ | |
5582 | for (i = 0; elf_buckets[i] != 0; i++) | |
5583 | { | |
5584 | best_size = elf_buckets[i]; | |
fdc90cb4 | 5585 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
5586 | break; |
5587 | } | |
fdc90cb4 JJ |
5588 | if (gnu_hash && best_size < 2) |
5589 | best_size = 2; | |
5a580b3a AM |
5590 | } |
5591 | ||
5a580b3a AM |
5592 | return best_size; |
5593 | } | |
5594 | ||
d0bf826b AM |
5595 | /* Size any SHT_GROUP section for ld -r. */ |
5596 | ||
5597 | bfd_boolean | |
5598 | _bfd_elf_size_group_sections (struct bfd_link_info *info) | |
5599 | { | |
5600 | bfd *ibfd; | |
5601 | ||
c72f2fb2 | 5602 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
d0bf826b AM |
5603 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour |
5604 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) | |
5605 | return FALSE; | |
5606 | return TRUE; | |
5607 | } | |
5608 | ||
04c3a755 NS |
5609 | /* Set a default stack segment size. The value in INFO wins. If it |
5610 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
5611 | undefined it is initialized. */ | |
5612 | ||
5613 | bfd_boolean | |
5614 | bfd_elf_stack_segment_size (bfd *output_bfd, | |
5615 | struct bfd_link_info *info, | |
5616 | const char *legacy_symbol, | |
5617 | bfd_vma default_size) | |
5618 | { | |
5619 | struct elf_link_hash_entry *h = NULL; | |
5620 | ||
5621 | /* Look for legacy symbol. */ | |
5622 | if (legacy_symbol) | |
5623 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
5624 | FALSE, FALSE, FALSE); | |
5625 | if (h && (h->root.type == bfd_link_hash_defined | |
5626 | || h->root.type == bfd_link_hash_defweak) | |
5627 | && h->def_regular | |
5628 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
5629 | { | |
5630 | /* The symbol has no type if specified on the command line. */ | |
5631 | h->type = STT_OBJECT; | |
5632 | if (info->stacksize) | |
5633 | (*_bfd_error_handler) (_("%B: stack size specified and %s set"), | |
5634 | output_bfd, legacy_symbol); | |
5635 | else if (h->root.u.def.section != bfd_abs_section_ptr) | |
5636 | (*_bfd_error_handler) (_("%B: %s not absolute"), | |
5637 | output_bfd, legacy_symbol); | |
5638 | else | |
5639 | info->stacksize = h->root.u.def.value; | |
5640 | } | |
5641 | ||
5642 | if (!info->stacksize) | |
5643 | /* If the user didn't set a size, or explicitly inhibit the | |
5644 | size, set it now. */ | |
5645 | info->stacksize = default_size; | |
5646 | ||
5647 | /* Provide the legacy symbol, if it is referenced. */ | |
5648 | if (h && (h->root.type == bfd_link_hash_undefined | |
5649 | || h->root.type == bfd_link_hash_undefweak)) | |
5650 | { | |
5651 | struct bfd_link_hash_entry *bh = NULL; | |
5652 | ||
5653 | if (!(_bfd_generic_link_add_one_symbol | |
5654 | (info, output_bfd, legacy_symbol, | |
5655 | BSF_GLOBAL, bfd_abs_section_ptr, | |
5656 | info->stacksize >= 0 ? info->stacksize : 0, | |
5657 | NULL, FALSE, get_elf_backend_data (output_bfd)->collect, &bh))) | |
5658 | return FALSE; | |
5659 | ||
5660 | h = (struct elf_link_hash_entry *) bh; | |
5661 | h->def_regular = 1; | |
5662 | h->type = STT_OBJECT; | |
5663 | } | |
5664 | ||
5665 | return TRUE; | |
5666 | } | |
5667 | ||
5a580b3a AM |
5668 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
5669 | called by the ELF linker emulation before_allocation routine. We | |
5670 | must set the sizes of the sections before the linker sets the | |
5671 | addresses of the various sections. */ | |
5672 | ||
5673 | bfd_boolean | |
5674 | bfd_elf_size_dynamic_sections (bfd *output_bfd, | |
5675 | const char *soname, | |
5676 | const char *rpath, | |
5677 | const char *filter_shlib, | |
7ee314fa AM |
5678 | const char *audit, |
5679 | const char *depaudit, | |
5a580b3a AM |
5680 | const char * const *auxiliary_filters, |
5681 | struct bfd_link_info *info, | |
fd91d419 | 5682 | asection **sinterpptr) |
5a580b3a AM |
5683 | { |
5684 | bfd_size_type soname_indx; | |
5685 | bfd *dynobj; | |
5686 | const struct elf_backend_data *bed; | |
28caa186 | 5687 | struct elf_info_failed asvinfo; |
5a580b3a AM |
5688 | |
5689 | *sinterpptr = NULL; | |
5690 | ||
5691 | soname_indx = (bfd_size_type) -1; | |
5692 | ||
5693 | if (!is_elf_hash_table (info->hash)) | |
5694 | return TRUE; | |
5695 | ||
6bfdb61b | 5696 | bed = get_elf_backend_data (output_bfd); |
04c3a755 NS |
5697 | |
5698 | /* Any syms created from now on start with -1 in | |
5699 | got.refcount/offset and plt.refcount/offset. */ | |
5700 | elf_hash_table (info)->init_got_refcount | |
5701 | = elf_hash_table (info)->init_got_offset; | |
5702 | elf_hash_table (info)->init_plt_refcount | |
5703 | = elf_hash_table (info)->init_plt_offset; | |
5704 | ||
0e1862bb | 5705 | if (bfd_link_relocatable (info) |
04c3a755 NS |
5706 | && !_bfd_elf_size_group_sections (info)) |
5707 | return FALSE; | |
5708 | ||
5709 | /* The backend may have to create some sections regardless of whether | |
5710 | we're dynamic or not. */ | |
5711 | if (bed->elf_backend_always_size_sections | |
5712 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
5713 | return FALSE; | |
5714 | ||
5715 | /* Determine any GNU_STACK segment requirements, after the backend | |
5716 | has had a chance to set a default segment size. */ | |
5a580b3a | 5717 | if (info->execstack) |
12bd6957 | 5718 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; |
5a580b3a | 5719 | else if (info->noexecstack) |
12bd6957 | 5720 | elf_stack_flags (output_bfd) = PF_R | PF_W; |
5a580b3a AM |
5721 | else |
5722 | { | |
5723 | bfd *inputobj; | |
5724 | asection *notesec = NULL; | |
5725 | int exec = 0; | |
5726 | ||
5727 | for (inputobj = info->input_bfds; | |
5728 | inputobj; | |
c72f2fb2 | 5729 | inputobj = inputobj->link.next) |
5a580b3a AM |
5730 | { |
5731 | asection *s; | |
5732 | ||
a92c088a L |
5733 | if (inputobj->flags |
5734 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
5a580b3a AM |
5735 | continue; |
5736 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); | |
5737 | if (s) | |
5738 | { | |
5739 | if (s->flags & SEC_CODE) | |
5740 | exec = PF_X; | |
5741 | notesec = s; | |
5742 | } | |
6bfdb61b | 5743 | else if (bed->default_execstack) |
5a580b3a AM |
5744 | exec = PF_X; |
5745 | } | |
04c3a755 | 5746 | if (notesec || info->stacksize > 0) |
12bd6957 | 5747 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; |
0e1862bb | 5748 | if (notesec && exec && bfd_link_relocatable (info) |
04c3a755 NS |
5749 | && notesec->output_section != bfd_abs_section_ptr) |
5750 | notesec->output_section->flags |= SEC_CODE; | |
5a580b3a AM |
5751 | } |
5752 | ||
5a580b3a AM |
5753 | dynobj = elf_hash_table (info)->dynobj; |
5754 | ||
9a2a56cc | 5755 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a AM |
5756 | { |
5757 | struct elf_info_failed eif; | |
5758 | struct elf_link_hash_entry *h; | |
5759 | asection *dynstr; | |
5760 | struct bfd_elf_version_tree *t; | |
5761 | struct bfd_elf_version_expr *d; | |
046183de | 5762 | asection *s; |
5a580b3a AM |
5763 | bfd_boolean all_defined; |
5764 | ||
3d4d4302 | 5765 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); |
9b8b325a | 5766 | BFD_ASSERT (*sinterpptr != NULL || !bfd_link_executable (info) || info->nointerp); |
5a580b3a AM |
5767 | |
5768 | if (soname != NULL) | |
5769 | { | |
5770 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5771 | soname, TRUE); | |
5772 | if (soname_indx == (bfd_size_type) -1 | |
5773 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
5774 | return FALSE; | |
5775 | } | |
5776 | ||
5777 | if (info->symbolic) | |
5778 | { | |
5779 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
5780 | return FALSE; | |
5781 | info->flags |= DF_SYMBOLIC; | |
5782 | } | |
5783 | ||
5784 | if (rpath != NULL) | |
5785 | { | |
5786 | bfd_size_type indx; | |
b1b00fcc | 5787 | bfd_vma tag; |
5a580b3a AM |
5788 | |
5789 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
5790 | TRUE); | |
b1b00fcc | 5791 | if (indx == (bfd_size_type) -1) |
5a580b3a AM |
5792 | return FALSE; |
5793 | ||
b1b00fcc MF |
5794 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; |
5795 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
5796 | return FALSE; | |
5a580b3a AM |
5797 | } |
5798 | ||
5799 | if (filter_shlib != NULL) | |
5800 | { | |
5801 | bfd_size_type indx; | |
5802 | ||
5803 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5804 | filter_shlib, TRUE); | |
5805 | if (indx == (bfd_size_type) -1 | |
5806 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
5807 | return FALSE; | |
5808 | } | |
5809 | ||
5810 | if (auxiliary_filters != NULL) | |
5811 | { | |
5812 | const char * const *p; | |
5813 | ||
5814 | for (p = auxiliary_filters; *p != NULL; p++) | |
5815 | { | |
5816 | bfd_size_type indx; | |
5817 | ||
5818 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5819 | *p, TRUE); | |
5820 | if (indx == (bfd_size_type) -1 | |
5821 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
5822 | return FALSE; | |
5823 | } | |
5824 | } | |
5825 | ||
7ee314fa AM |
5826 | if (audit != NULL) |
5827 | { | |
5828 | bfd_size_type indx; | |
5829 | ||
5830 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
5831 | TRUE); | |
5832 | if (indx == (bfd_size_type) -1 | |
5833 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
5834 | return FALSE; | |
5835 | } | |
5836 | ||
5837 | if (depaudit != NULL) | |
5838 | { | |
5839 | bfd_size_type indx; | |
5840 | ||
5841 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
5842 | TRUE); | |
5843 | if (indx == (bfd_size_type) -1 | |
5844 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
5845 | return FALSE; | |
5846 | } | |
5847 | ||
5a580b3a | 5848 | eif.info = info; |
5a580b3a AM |
5849 | eif.failed = FALSE; |
5850 | ||
5851 | /* If we are supposed to export all symbols into the dynamic symbol | |
5852 | table (this is not the normal case), then do so. */ | |
55255dae | 5853 | if (info->export_dynamic |
0e1862bb | 5854 | || (bfd_link_executable (info) && info->dynamic)) |
5a580b3a AM |
5855 | { |
5856 | elf_link_hash_traverse (elf_hash_table (info), | |
5857 | _bfd_elf_export_symbol, | |
5858 | &eif); | |
5859 | if (eif.failed) | |
5860 | return FALSE; | |
5861 | } | |
5862 | ||
5863 | /* Make all global versions with definition. */ | |
fd91d419 | 5864 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 5865 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 5866 | if (!d->symver && d->literal) |
5a580b3a AM |
5867 | { |
5868 | const char *verstr, *name; | |
5869 | size_t namelen, verlen, newlen; | |
93252b1c | 5870 | char *newname, *p, leading_char; |
5a580b3a AM |
5871 | struct elf_link_hash_entry *newh; |
5872 | ||
93252b1c | 5873 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 5874 | name = d->pattern; |
93252b1c | 5875 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
5876 | verstr = t->name; |
5877 | verlen = strlen (verstr); | |
5878 | newlen = namelen + verlen + 3; | |
5879 | ||
a50b1753 | 5880 | newname = (char *) bfd_malloc (newlen); |
5a580b3a AM |
5881 | if (newname == NULL) |
5882 | return FALSE; | |
93252b1c MF |
5883 | newname[0] = leading_char; |
5884 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
5885 | |
5886 | /* Check the hidden versioned definition. */ | |
5887 | p = newname + namelen; | |
5888 | *p++ = ELF_VER_CHR; | |
5889 | memcpy (p, verstr, verlen + 1); | |
5890 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5891 | newname, FALSE, FALSE, | |
5892 | FALSE); | |
5893 | if (newh == NULL | |
5894 | || (newh->root.type != bfd_link_hash_defined | |
5895 | && newh->root.type != bfd_link_hash_defweak)) | |
5896 | { | |
5897 | /* Check the default versioned definition. */ | |
5898 | *p++ = ELF_VER_CHR; | |
5899 | memcpy (p, verstr, verlen + 1); | |
5900 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5901 | newname, FALSE, FALSE, | |
5902 | FALSE); | |
5903 | } | |
5904 | free (newname); | |
5905 | ||
5906 | /* Mark this version if there is a definition and it is | |
5907 | not defined in a shared object. */ | |
5908 | if (newh != NULL | |
f5385ebf | 5909 | && !newh->def_dynamic |
5a580b3a AM |
5910 | && (newh->root.type == bfd_link_hash_defined |
5911 | || newh->root.type == bfd_link_hash_defweak)) | |
5912 | d->symver = 1; | |
5913 | } | |
5914 | ||
5915 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 5916 | asvinfo.info = info; |
5a580b3a AM |
5917 | asvinfo.failed = FALSE; |
5918 | ||
5919 | elf_link_hash_traverse (elf_hash_table (info), | |
5920 | _bfd_elf_link_assign_sym_version, | |
5921 | &asvinfo); | |
5922 | if (asvinfo.failed) | |
5923 | return FALSE; | |
5924 | ||
5925 | if (!info->allow_undefined_version) | |
5926 | { | |
5927 | /* Check if all global versions have a definition. */ | |
5928 | all_defined = TRUE; | |
fd91d419 | 5929 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 5930 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 5931 | if (d->literal && !d->symver && !d->script) |
5a580b3a AM |
5932 | { |
5933 | (*_bfd_error_handler) | |
5934 | (_("%s: undefined version: %s"), | |
5935 | d->pattern, t->name); | |
5936 | all_defined = FALSE; | |
5937 | } | |
5938 | ||
5939 | if (!all_defined) | |
5940 | { | |
5941 | bfd_set_error (bfd_error_bad_value); | |
5942 | return FALSE; | |
5943 | } | |
5944 | } | |
5945 | ||
5946 | /* Find all symbols which were defined in a dynamic object and make | |
5947 | the backend pick a reasonable value for them. */ | |
5948 | elf_link_hash_traverse (elf_hash_table (info), | |
5949 | _bfd_elf_adjust_dynamic_symbol, | |
5950 | &eif); | |
5951 | if (eif.failed) | |
5952 | return FALSE; | |
5953 | ||
5954 | /* Add some entries to the .dynamic section. We fill in some of the | |
ee75fd95 | 5955 | values later, in bfd_elf_final_link, but we must add the entries |
5a580b3a AM |
5956 | now so that we know the final size of the .dynamic section. */ |
5957 | ||
5958 | /* If there are initialization and/or finalization functions to | |
5959 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
5960 | h = (info->init_function | |
5961 | ? elf_link_hash_lookup (elf_hash_table (info), | |
5962 | info->init_function, FALSE, | |
5963 | FALSE, FALSE) | |
5964 | : NULL); | |
5965 | if (h != NULL | |
f5385ebf AM |
5966 | && (h->ref_regular |
5967 | || h->def_regular)) | |
5a580b3a AM |
5968 | { |
5969 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
5970 | return FALSE; | |
5971 | } | |
5972 | h = (info->fini_function | |
5973 | ? elf_link_hash_lookup (elf_hash_table (info), | |
5974 | info->fini_function, FALSE, | |
5975 | FALSE, FALSE) | |
5976 | : NULL); | |
5977 | if (h != NULL | |
f5385ebf AM |
5978 | && (h->ref_regular |
5979 | || h->def_regular)) | |
5a580b3a AM |
5980 | { |
5981 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
5982 | return FALSE; | |
5983 | } | |
5984 | ||
046183de AM |
5985 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); |
5986 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
5987 | { |
5988 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
0e1862bb | 5989 | if (! bfd_link_executable (info)) |
5a580b3a AM |
5990 | { |
5991 | bfd *sub; | |
5992 | asection *o; | |
5993 | ||
5994 | for (sub = info->input_bfds; sub != NULL; | |
c72f2fb2 | 5995 | sub = sub->link.next) |
3fcd97f1 JJ |
5996 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
5997 | for (o = sub->sections; o != NULL; o = o->next) | |
5998 | if (elf_section_data (o)->this_hdr.sh_type | |
5999 | == SHT_PREINIT_ARRAY) | |
6000 | { | |
6001 | (*_bfd_error_handler) | |
6002 | (_("%B: .preinit_array section is not allowed in DSO"), | |
6003 | sub); | |
6004 | break; | |
6005 | } | |
5a580b3a AM |
6006 | |
6007 | bfd_set_error (bfd_error_nonrepresentable_section); | |
6008 | return FALSE; | |
6009 | } | |
6010 | ||
6011 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
6012 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
6013 | return FALSE; | |
6014 | } | |
046183de AM |
6015 | s = bfd_get_section_by_name (output_bfd, ".init_array"); |
6016 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6017 | { |
6018 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
6019 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
6020 | return FALSE; | |
6021 | } | |
046183de AM |
6022 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); |
6023 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
6024 | { |
6025 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
6026 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
6027 | return FALSE; | |
6028 | } | |
6029 | ||
3d4d4302 | 6030 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6031 | /* If .dynstr is excluded from the link, we don't want any of |
6032 | these tags. Strictly, we should be checking each section | |
6033 | individually; This quick check covers for the case where | |
6034 | someone does a /DISCARD/ : { *(*) }. */ | |
6035 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
6036 | { | |
6037 | bfd_size_type strsize; | |
6038 | ||
6039 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
fdc90cb4 JJ |
6040 | if ((info->emit_hash |
6041 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
6042 | || (info->emit_gnu_hash | |
6043 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0)) | |
5a580b3a AM |
6044 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
6045 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
6046 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
6047 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
6048 | bed->s->sizeof_sym)) | |
6049 | return FALSE; | |
6050 | } | |
6051 | } | |
6052 | ||
de231f20 CM |
6053 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
6054 | return FALSE; | |
6055 | ||
5a580b3a AM |
6056 | /* The backend must work out the sizes of all the other dynamic |
6057 | sections. */ | |
9a2a56cc AM |
6058 | if (dynobj != NULL |
6059 | && bed->elf_backend_size_dynamic_sections != NULL | |
5a580b3a AM |
6060 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
6061 | return FALSE; | |
6062 | ||
9a2a56cc | 6063 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a | 6064 | { |
554220db | 6065 | unsigned long section_sym_count; |
fd91d419 | 6066 | struct bfd_elf_version_tree *verdefs; |
5a580b3a | 6067 | asection *s; |
5a580b3a AM |
6068 | |
6069 | /* Set up the version definition section. */ | |
3d4d4302 | 6070 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
6071 | BFD_ASSERT (s != NULL); |
6072 | ||
6073 | /* We may have created additional version definitions if we are | |
6074 | just linking a regular application. */ | |
fd91d419 | 6075 | verdefs = info->version_info; |
5a580b3a AM |
6076 | |
6077 | /* Skip anonymous version tag. */ | |
6078 | if (verdefs != NULL && verdefs->vernum == 0) | |
6079 | verdefs = verdefs->next; | |
6080 | ||
3e3b46e5 | 6081 | if (verdefs == NULL && !info->create_default_symver) |
8423293d | 6082 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6083 | else |
6084 | { | |
6085 | unsigned int cdefs; | |
6086 | bfd_size_type size; | |
6087 | struct bfd_elf_version_tree *t; | |
6088 | bfd_byte *p; | |
6089 | Elf_Internal_Verdef def; | |
6090 | Elf_Internal_Verdaux defaux; | |
3e3b46e5 PB |
6091 | struct bfd_link_hash_entry *bh; |
6092 | struct elf_link_hash_entry *h; | |
6093 | const char *name; | |
5a580b3a AM |
6094 | |
6095 | cdefs = 0; | |
6096 | size = 0; | |
6097 | ||
6098 | /* Make space for the base version. */ | |
6099 | size += sizeof (Elf_External_Verdef); | |
6100 | size += sizeof (Elf_External_Verdaux); | |
6101 | ++cdefs; | |
6102 | ||
3e3b46e5 PB |
6103 | /* Make space for the default version. */ |
6104 | if (info->create_default_symver) | |
6105 | { | |
6106 | size += sizeof (Elf_External_Verdef); | |
6107 | ++cdefs; | |
6108 | } | |
6109 | ||
5a580b3a AM |
6110 | for (t = verdefs; t != NULL; t = t->next) |
6111 | { | |
6112 | struct bfd_elf_version_deps *n; | |
6113 | ||
a6cc6b3b RO |
6114 | /* Don't emit base version twice. */ |
6115 | if (t->vernum == 0) | |
6116 | continue; | |
6117 | ||
5a580b3a AM |
6118 | size += sizeof (Elf_External_Verdef); |
6119 | size += sizeof (Elf_External_Verdaux); | |
6120 | ++cdefs; | |
6121 | ||
6122 | for (n = t->deps; n != NULL; n = n->next) | |
6123 | size += sizeof (Elf_External_Verdaux); | |
6124 | } | |
6125 | ||
eea6121a | 6126 | s->size = size; |
a50b1753 | 6127 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6128 | if (s->contents == NULL && s->size != 0) |
5a580b3a AM |
6129 | return FALSE; |
6130 | ||
6131 | /* Fill in the version definition section. */ | |
6132 | ||
6133 | p = s->contents; | |
6134 | ||
6135 | def.vd_version = VER_DEF_CURRENT; | |
6136 | def.vd_flags = VER_FLG_BASE; | |
6137 | def.vd_ndx = 1; | |
6138 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6139 | if (info->create_default_symver) |
6140 | { | |
6141 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6142 | def.vd_next = sizeof (Elf_External_Verdef); | |
6143 | } | |
6144 | else | |
6145 | { | |
6146 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6147 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6148 | + sizeof (Elf_External_Verdaux)); | |
6149 | } | |
5a580b3a AM |
6150 | |
6151 | if (soname_indx != (bfd_size_type) -1) | |
6152 | { | |
6153 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6154 | soname_indx); | |
6155 | def.vd_hash = bfd_elf_hash (soname); | |
6156 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6157 | name = soname; |
5a580b3a AM |
6158 | } |
6159 | else | |
6160 | { | |
5a580b3a AM |
6161 | bfd_size_type indx; |
6162 | ||
06084812 | 6163 | name = lbasename (output_bfd->filename); |
5a580b3a AM |
6164 | def.vd_hash = bfd_elf_hash (name); |
6165 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6166 | name, FALSE); | |
6167 | if (indx == (bfd_size_type) -1) | |
6168 | return FALSE; | |
6169 | defaux.vda_name = indx; | |
6170 | } | |
6171 | defaux.vda_next = 0; | |
6172 | ||
6173 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6174 | (Elf_External_Verdef *) p); | |
6175 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6176 | if (info->create_default_symver) |
6177 | { | |
6178 | /* Add a symbol representing this version. */ | |
6179 | bh = NULL; | |
6180 | if (! (_bfd_generic_link_add_one_symbol | |
6181 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6182 | 0, NULL, FALSE, | |
6183 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6184 | return FALSE; | |
6185 | h = (struct elf_link_hash_entry *) bh; | |
6186 | h->non_elf = 0; | |
6187 | h->def_regular = 1; | |
6188 | h->type = STT_OBJECT; | |
6189 | h->verinfo.vertree = NULL; | |
6190 | ||
6191 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
6192 | return FALSE; | |
6193 | ||
6194 | /* Create a duplicate of the base version with the same | |
6195 | aux block, but different flags. */ | |
6196 | def.vd_flags = 0; | |
6197 | def.vd_ndx = 2; | |
6198 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6199 | if (verdefs) | |
6200 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6201 | + sizeof (Elf_External_Verdaux)); | |
6202 | else | |
6203 | def.vd_next = 0; | |
6204 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6205 | (Elf_External_Verdef *) p); | |
6206 | p += sizeof (Elf_External_Verdef); | |
6207 | } | |
5a580b3a AM |
6208 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6209 | (Elf_External_Verdaux *) p); | |
6210 | p += sizeof (Elf_External_Verdaux); | |
6211 | ||
6212 | for (t = verdefs; t != NULL; t = t->next) | |
6213 | { | |
6214 | unsigned int cdeps; | |
6215 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6216 | |
a6cc6b3b RO |
6217 | /* Don't emit the base version twice. */ |
6218 | if (t->vernum == 0) | |
6219 | continue; | |
6220 | ||
5a580b3a AM |
6221 | cdeps = 0; |
6222 | for (n = t->deps; n != NULL; n = n->next) | |
6223 | ++cdeps; | |
6224 | ||
6225 | /* Add a symbol representing this version. */ | |
6226 | bh = NULL; | |
6227 | if (! (_bfd_generic_link_add_one_symbol | |
6228 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6229 | 0, NULL, FALSE, | |
6230 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6231 | return FALSE; | |
6232 | h = (struct elf_link_hash_entry *) bh; | |
f5385ebf AM |
6233 | h->non_elf = 0; |
6234 | h->def_regular = 1; | |
5a580b3a AM |
6235 | h->type = STT_OBJECT; |
6236 | h->verinfo.vertree = t; | |
6237 | ||
c152c796 | 6238 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5a580b3a AM |
6239 | return FALSE; |
6240 | ||
6241 | def.vd_version = VER_DEF_CURRENT; | |
6242 | def.vd_flags = 0; | |
6243 | if (t->globals.list == NULL | |
6244 | && t->locals.list == NULL | |
6245 | && ! t->used) | |
6246 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6247 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6248 | def.vd_cnt = cdeps + 1; |
6249 | def.vd_hash = bfd_elf_hash (t->name); | |
6250 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6251 | def.vd_next = 0; | |
a6cc6b3b RO |
6252 | |
6253 | /* If a basever node is next, it *must* be the last node in | |
6254 | the chain, otherwise Verdef construction breaks. */ | |
6255 | if (t->next != NULL && t->next->vernum == 0) | |
6256 | BFD_ASSERT (t->next->next == NULL); | |
6257 | ||
6258 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6259 | def.vd_next = (sizeof (Elf_External_Verdef) |
6260 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6261 | ||
6262 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6263 | (Elf_External_Verdef *) p); | |
6264 | p += sizeof (Elf_External_Verdef); | |
6265 | ||
6266 | defaux.vda_name = h->dynstr_index; | |
6267 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6268 | h->dynstr_index); | |
6269 | defaux.vda_next = 0; | |
6270 | if (t->deps != NULL) | |
6271 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6272 | t->name_indx = defaux.vda_name; | |
6273 | ||
6274 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6275 | (Elf_External_Verdaux *) p); | |
6276 | p += sizeof (Elf_External_Verdaux); | |
6277 | ||
6278 | for (n = t->deps; n != NULL; n = n->next) | |
6279 | { | |
6280 | if (n->version_needed == NULL) | |
6281 | { | |
6282 | /* This can happen if there was an error in the | |
6283 | version script. */ | |
6284 | defaux.vda_name = 0; | |
6285 | } | |
6286 | else | |
6287 | { | |
6288 | defaux.vda_name = n->version_needed->name_indx; | |
6289 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6290 | defaux.vda_name); | |
6291 | } | |
6292 | if (n->next == NULL) | |
6293 | defaux.vda_next = 0; | |
6294 | else | |
6295 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6296 | ||
6297 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6298 | (Elf_External_Verdaux *) p); | |
6299 | p += sizeof (Elf_External_Verdaux); | |
6300 | } | |
6301 | } | |
6302 | ||
6303 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
6304 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
6305 | return FALSE; | |
6306 | ||
6307 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
6308 | } | |
6309 | ||
6310 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
6311 | { | |
6312 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
6313 | return FALSE; | |
6314 | } | |
6315 | else if (info->flags & DF_BIND_NOW) | |
6316 | { | |
6317 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
6318 | return FALSE; | |
6319 | } | |
6320 | ||
6321 | if (info->flags_1) | |
6322 | { | |
0e1862bb | 6323 | if (bfd_link_executable (info)) |
5a580b3a AM |
6324 | info->flags_1 &= ~ (DF_1_INITFIRST |
6325 | | DF_1_NODELETE | |
6326 | | DF_1_NOOPEN); | |
6327 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
6328 | return FALSE; | |
6329 | } | |
6330 | ||
6331 | /* Work out the size of the version reference section. */ | |
6332 | ||
3d4d4302 | 6333 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
6334 | BFD_ASSERT (s != NULL); |
6335 | { | |
6336 | struct elf_find_verdep_info sinfo; | |
6337 | ||
5a580b3a AM |
6338 | sinfo.info = info; |
6339 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6340 | if (sinfo.vers == 0) | |
6341 | sinfo.vers = 1; | |
6342 | sinfo.failed = FALSE; | |
6343 | ||
6344 | elf_link_hash_traverse (elf_hash_table (info), | |
6345 | _bfd_elf_link_find_version_dependencies, | |
6346 | &sinfo); | |
14b1c01e AM |
6347 | if (sinfo.failed) |
6348 | return FALSE; | |
5a580b3a AM |
6349 | |
6350 | if (elf_tdata (output_bfd)->verref == NULL) | |
8423293d | 6351 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6352 | else |
6353 | { | |
6354 | Elf_Internal_Verneed *t; | |
6355 | unsigned int size; | |
6356 | unsigned int crefs; | |
6357 | bfd_byte *p; | |
6358 | ||
a6cc6b3b | 6359 | /* Build the version dependency section. */ |
5a580b3a AM |
6360 | size = 0; |
6361 | crefs = 0; | |
6362 | for (t = elf_tdata (output_bfd)->verref; | |
6363 | t != NULL; | |
6364 | t = t->vn_nextref) | |
6365 | { | |
6366 | Elf_Internal_Vernaux *a; | |
6367 | ||
6368 | size += sizeof (Elf_External_Verneed); | |
6369 | ++crefs; | |
6370 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6371 | size += sizeof (Elf_External_Vernaux); | |
6372 | } | |
6373 | ||
eea6121a | 6374 | s->size = size; |
a50b1753 | 6375 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
5a580b3a AM |
6376 | if (s->contents == NULL) |
6377 | return FALSE; | |
6378 | ||
6379 | p = s->contents; | |
6380 | for (t = elf_tdata (output_bfd)->verref; | |
6381 | t != NULL; | |
6382 | t = t->vn_nextref) | |
6383 | { | |
6384 | unsigned int caux; | |
6385 | Elf_Internal_Vernaux *a; | |
6386 | bfd_size_type indx; | |
6387 | ||
6388 | caux = 0; | |
6389 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6390 | ++caux; | |
6391 | ||
6392 | t->vn_version = VER_NEED_CURRENT; | |
6393 | t->vn_cnt = caux; | |
6394 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6395 | elf_dt_name (t->vn_bfd) != NULL | |
6396 | ? elf_dt_name (t->vn_bfd) | |
06084812 | 6397 | : lbasename (t->vn_bfd->filename), |
5a580b3a AM |
6398 | FALSE); |
6399 | if (indx == (bfd_size_type) -1) | |
6400 | return FALSE; | |
6401 | t->vn_file = indx; | |
6402 | t->vn_aux = sizeof (Elf_External_Verneed); | |
6403 | if (t->vn_nextref == NULL) | |
6404 | t->vn_next = 0; | |
6405 | else | |
6406 | t->vn_next = (sizeof (Elf_External_Verneed) | |
6407 | + caux * sizeof (Elf_External_Vernaux)); | |
6408 | ||
6409 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
6410 | (Elf_External_Verneed *) p); | |
6411 | p += sizeof (Elf_External_Verneed); | |
6412 | ||
6413 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6414 | { | |
6415 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6416 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6417 | a->vna_nodename, FALSE); | |
6418 | if (indx == (bfd_size_type) -1) | |
6419 | return FALSE; | |
6420 | a->vna_name = indx; | |
6421 | if (a->vna_nextptr == NULL) | |
6422 | a->vna_next = 0; | |
6423 | else | |
6424 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6425 | ||
6426 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6427 | (Elf_External_Vernaux *) p); | |
6428 | p += sizeof (Elf_External_Vernaux); | |
6429 | } | |
6430 | } | |
6431 | ||
6432 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
6433 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
6434 | return FALSE; | |
6435 | ||
6436 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6437 | } | |
6438 | } | |
6439 | ||
8423293d AM |
6440 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
6441 | && elf_tdata (output_bfd)->cverdefs == 0) | |
6442 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
6443 | §ion_sym_count) == 0) | |
6444 | { | |
3d4d4302 | 6445 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
6446 | s->flags |= SEC_EXCLUDE; |
6447 | } | |
6448 | } | |
6449 | return TRUE; | |
6450 | } | |
6451 | ||
74541ad4 AM |
6452 | /* Find the first non-excluded output section. We'll use its |
6453 | section symbol for some emitted relocs. */ | |
6454 | void | |
6455 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
6456 | { | |
6457 | asection *s; | |
6458 | ||
6459 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
6460 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
6461 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) | |
6462 | { | |
6463 | elf_hash_table (info)->text_index_section = s; | |
6464 | break; | |
6465 | } | |
6466 | } | |
6467 | ||
6468 | /* Find two non-excluded output sections, one for code, one for data. | |
6469 | We'll use their section symbols for some emitted relocs. */ | |
6470 | void | |
6471 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
6472 | { | |
6473 | asection *s; | |
6474 | ||
266b05cf DJ |
6475 | /* Data first, since setting text_index_section changes |
6476 | _bfd_elf_link_omit_section_dynsym. */ | |
74541ad4 | 6477 | for (s = output_bfd->sections; s != NULL; s = s->next) |
266b05cf | 6478 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
74541ad4 AM |
6479 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6480 | { | |
266b05cf | 6481 | elf_hash_table (info)->data_index_section = s; |
74541ad4 AM |
6482 | break; |
6483 | } | |
6484 | ||
6485 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
266b05cf DJ |
6486 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) |
6487 | == (SEC_ALLOC | SEC_READONLY)) | |
74541ad4 AM |
6488 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6489 | { | |
266b05cf | 6490 | elf_hash_table (info)->text_index_section = s; |
74541ad4 AM |
6491 | break; |
6492 | } | |
6493 | ||
6494 | if (elf_hash_table (info)->text_index_section == NULL) | |
6495 | elf_hash_table (info)->text_index_section | |
6496 | = elf_hash_table (info)->data_index_section; | |
6497 | } | |
6498 | ||
8423293d AM |
6499 | bfd_boolean |
6500 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
6501 | { | |
74541ad4 AM |
6502 | const struct elf_backend_data *bed; |
6503 | ||
8423293d AM |
6504 | if (!is_elf_hash_table (info->hash)) |
6505 | return TRUE; | |
6506 | ||
74541ad4 AM |
6507 | bed = get_elf_backend_data (output_bfd); |
6508 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
6509 | ||
8423293d AM |
6510 | if (elf_hash_table (info)->dynamic_sections_created) |
6511 | { | |
6512 | bfd *dynobj; | |
8423293d AM |
6513 | asection *s; |
6514 | bfd_size_type dynsymcount; | |
6515 | unsigned long section_sym_count; | |
8423293d AM |
6516 | unsigned int dtagcount; |
6517 | ||
6518 | dynobj = elf_hash_table (info)->dynobj; | |
6519 | ||
5a580b3a AM |
6520 | /* Assign dynsym indicies. In a shared library we generate a |
6521 | section symbol for each output section, which come first. | |
6522 | Next come all of the back-end allocated local dynamic syms, | |
6523 | followed by the rest of the global symbols. */ | |
6524 | ||
554220db AM |
6525 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, |
6526 | §ion_sym_count); | |
5a580b3a AM |
6527 | |
6528 | /* Work out the size of the symbol version section. */ | |
3d4d4302 | 6529 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 6530 | BFD_ASSERT (s != NULL); |
8423293d AM |
6531 | if (dynsymcount != 0 |
6532 | && (s->flags & SEC_EXCLUDE) == 0) | |
5a580b3a | 6533 | { |
eea6121a | 6534 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 6535 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a AM |
6536 | if (s->contents == NULL) |
6537 | return FALSE; | |
6538 | ||
6539 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
6540 | return FALSE; | |
6541 | } | |
6542 | ||
6543 | /* Set the size of the .dynsym and .hash sections. We counted | |
6544 | the number of dynamic symbols in elf_link_add_object_symbols. | |
6545 | We will build the contents of .dynsym and .hash when we build | |
6546 | the final symbol table, because until then we do not know the | |
6547 | correct value to give the symbols. We built the .dynstr | |
6548 | section as we went along in elf_link_add_object_symbols. */ | |
cae1fbbb | 6549 | s = elf_hash_table (info)->dynsym; |
5a580b3a | 6550 | BFD_ASSERT (s != NULL); |
eea6121a | 6551 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a AM |
6552 | |
6553 | if (dynsymcount != 0) | |
6554 | { | |
a50b1753 | 6555 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
554220db AM |
6556 | if (s->contents == NULL) |
6557 | return FALSE; | |
5a580b3a | 6558 | |
554220db AM |
6559 | /* The first entry in .dynsym is a dummy symbol. |
6560 | Clear all the section syms, in case we don't output them all. */ | |
6561 | ++section_sym_count; | |
6562 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a AM |
6563 | } |
6564 | ||
fdc90cb4 JJ |
6565 | elf_hash_table (info)->bucketcount = 0; |
6566 | ||
5a580b3a AM |
6567 | /* Compute the size of the hashing table. As a side effect this |
6568 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
6569 | if (info->emit_hash) |
6570 | { | |
6571 | unsigned long int *hashcodes; | |
14b1c01e | 6572 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
6573 | bfd_size_type amt; |
6574 | unsigned long int nsyms; | |
6575 | size_t bucketcount; | |
6576 | size_t hash_entry_size; | |
6577 | ||
6578 | /* Compute the hash values for all exported symbols. At the same | |
6579 | time store the values in an array so that we could use them for | |
6580 | optimizations. */ | |
6581 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 6582 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6583 | if (hashcodes == NULL) |
6584 | return FALSE; | |
14b1c01e AM |
6585 | hashinf.hashcodes = hashcodes; |
6586 | hashinf.error = FALSE; | |
5a580b3a | 6587 | |
fdc90cb4 JJ |
6588 | /* Put all hash values in HASHCODES. */ |
6589 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
6590 | elf_collect_hash_codes, &hashinf); |
6591 | if (hashinf.error) | |
4dd07732 AM |
6592 | { |
6593 | free (hashcodes); | |
6594 | return FALSE; | |
6595 | } | |
5a580b3a | 6596 | |
14b1c01e | 6597 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
6598 | bucketcount |
6599 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
6600 | free (hashcodes); | |
6601 | ||
6602 | if (bucketcount == 0) | |
6603 | return FALSE; | |
5a580b3a | 6604 | |
fdc90cb4 JJ |
6605 | elf_hash_table (info)->bucketcount = bucketcount; |
6606 | ||
3d4d4302 | 6607 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
6608 | BFD_ASSERT (s != NULL); |
6609 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
6610 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 6611 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6612 | if (s->contents == NULL) |
6613 | return FALSE; | |
6614 | ||
6615 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
6616 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
6617 | s->contents + hash_entry_size); | |
6618 | } | |
6619 | ||
6620 | if (info->emit_gnu_hash) | |
6621 | { | |
6622 | size_t i, cnt; | |
6623 | unsigned char *contents; | |
6624 | struct collect_gnu_hash_codes cinfo; | |
6625 | bfd_size_type amt; | |
6626 | size_t bucketcount; | |
6627 | ||
6628 | memset (&cinfo, 0, sizeof (cinfo)); | |
6629 | ||
6630 | /* Compute the hash values for all exported symbols. At the same | |
6631 | time store the values in an array so that we could use them for | |
6632 | optimizations. */ | |
6633 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 6634 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6635 | if (cinfo.hashcodes == NULL) |
6636 | return FALSE; | |
6637 | ||
6638 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
6639 | cinfo.min_dynindx = -1; | |
6640 | cinfo.output_bfd = output_bfd; | |
6641 | cinfo.bed = bed; | |
6642 | ||
6643 | /* Put all hash values in HASHCODES. */ | |
6644 | elf_link_hash_traverse (elf_hash_table (info), | |
6645 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 6646 | if (cinfo.error) |
4dd07732 AM |
6647 | { |
6648 | free (cinfo.hashcodes); | |
6649 | return FALSE; | |
6650 | } | |
fdc90cb4 JJ |
6651 | |
6652 | bucketcount | |
6653 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
6654 | ||
6655 | if (bucketcount == 0) | |
6656 | { | |
6657 | free (cinfo.hashcodes); | |
6658 | return FALSE; | |
6659 | } | |
6660 | ||
3d4d4302 | 6661 | s = bfd_get_linker_section (dynobj, ".gnu.hash"); |
fdc90cb4 JJ |
6662 | BFD_ASSERT (s != NULL); |
6663 | ||
6664 | if (cinfo.nsyms == 0) | |
6665 | { | |
6666 | /* Empty .gnu.hash section is special. */ | |
6667 | BFD_ASSERT (cinfo.min_dynindx == -1); | |
6668 | free (cinfo.hashcodes); | |
6669 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 6670 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6671 | if (contents == NULL) |
6672 | return FALSE; | |
6673 | s->contents = contents; | |
6674 | /* 1 empty bucket. */ | |
6675 | bfd_put_32 (output_bfd, 1, contents); | |
6676 | /* SYMIDX above the special symbol 0. */ | |
6677 | bfd_put_32 (output_bfd, 1, contents + 4); | |
6678 | /* Just one word for bitmask. */ | |
6679 | bfd_put_32 (output_bfd, 1, contents + 8); | |
6680 | /* Only hash fn bloom filter. */ | |
6681 | bfd_put_32 (output_bfd, 0, contents + 12); | |
6682 | /* No hashes are valid - empty bitmask. */ | |
6683 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
6684 | /* No hashes in the only bucket. */ | |
6685 | bfd_put_32 (output_bfd, 0, | |
6686 | contents + 16 + bed->s->arch_size / 8); | |
6687 | } | |
6688 | else | |
6689 | { | |
9e6619e2 | 6690 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 6691 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 6692 | |
9e6619e2 AM |
6693 | x = cinfo.nsyms; |
6694 | maskbitslog2 = 1; | |
6695 | while ((x >>= 1) != 0) | |
6696 | ++maskbitslog2; | |
fdc90cb4 JJ |
6697 | if (maskbitslog2 < 3) |
6698 | maskbitslog2 = 5; | |
6699 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
6700 | maskbitslog2 = maskbitslog2 + 3; | |
6701 | else | |
6702 | maskbitslog2 = maskbitslog2 + 2; | |
6703 | if (bed->s->arch_size == 64) | |
6704 | { | |
6705 | if (maskbitslog2 == 5) | |
6706 | maskbitslog2 = 6; | |
6707 | cinfo.shift1 = 6; | |
6708 | } | |
6709 | else | |
6710 | cinfo.shift1 = 5; | |
6711 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 6712 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
6713 | cinfo.maskbits = 1 << maskbitslog2; |
6714 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
6715 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
6716 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 6717 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
6718 | if (cinfo.bitmask == NULL) |
6719 | { | |
6720 | free (cinfo.hashcodes); | |
6721 | return FALSE; | |
6722 | } | |
6723 | ||
a50b1753 | 6724 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
6725 | cinfo.indx = cinfo.counts + bucketcount; |
6726 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
6727 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
6728 | ||
6729 | /* Determine how often each hash bucket is used. */ | |
6730 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
6731 | for (i = 0; i < cinfo.nsyms; ++i) | |
6732 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
6733 | ||
6734 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
6735 | if (cinfo.counts[i] != 0) | |
6736 | { | |
6737 | cinfo.indx[i] = cnt; | |
6738 | cnt += cinfo.counts[i]; | |
6739 | } | |
6740 | BFD_ASSERT (cnt == dynsymcount); | |
6741 | cinfo.bucketcount = bucketcount; | |
6742 | cinfo.local_indx = cinfo.min_dynindx; | |
6743 | ||
6744 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
6745 | s->size += cinfo.maskbits / 8; | |
a50b1753 | 6746 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6747 | if (contents == NULL) |
6748 | { | |
6749 | free (cinfo.bitmask); | |
6750 | free (cinfo.hashcodes); | |
6751 | return FALSE; | |
6752 | } | |
6753 | ||
6754 | s->contents = contents; | |
6755 | bfd_put_32 (output_bfd, bucketcount, contents); | |
6756 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
6757 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
6758 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
6759 | contents += 16 + cinfo.maskbits / 8; | |
6760 | ||
6761 | for (i = 0; i < bucketcount; ++i) | |
6762 | { | |
6763 | if (cinfo.counts[i] == 0) | |
6764 | bfd_put_32 (output_bfd, 0, contents); | |
6765 | else | |
6766 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
6767 | contents += 4; | |
6768 | } | |
6769 | ||
6770 | cinfo.contents = contents; | |
6771 | ||
6772 | /* Renumber dynamic symbols, populate .gnu.hash section. */ | |
6773 | elf_link_hash_traverse (elf_hash_table (info), | |
6774 | elf_renumber_gnu_hash_syms, &cinfo); | |
6775 | ||
6776 | contents = s->contents + 16; | |
6777 | for (i = 0; i < maskwords; ++i) | |
6778 | { | |
6779 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
6780 | contents); | |
6781 | contents += bed->s->arch_size / 8; | |
6782 | } | |
6783 | ||
6784 | free (cinfo.bitmask); | |
6785 | free (cinfo.hashcodes); | |
6786 | } | |
6787 | } | |
5a580b3a | 6788 | |
3d4d4302 | 6789 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6790 | BFD_ASSERT (s != NULL); |
6791 | ||
4ad4eba5 | 6792 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 6793 | |
eea6121a | 6794 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
6795 | |
6796 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
6797 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
6798 | return FALSE; | |
6799 | } | |
6800 | ||
6801 | return TRUE; | |
6802 | } | |
4d269e42 | 6803 | \f |
4d269e42 AM |
6804 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
6805 | ||
6806 | static void | |
6807 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
6808 | asection *sec) | |
6809 | { | |
dbaa2011 AM |
6810 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
6811 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
6812 | } |
6813 | ||
6814 | /* Finish SHF_MERGE section merging. */ | |
6815 | ||
6816 | bfd_boolean | |
630993ec | 6817 | _bfd_elf_merge_sections (bfd *obfd, struct bfd_link_info *info) |
4d269e42 AM |
6818 | { |
6819 | bfd *ibfd; | |
6820 | asection *sec; | |
9865bd0d | 6821 | const struct elf_backend_data *bed; |
4d269e42 AM |
6822 | |
6823 | if (!is_elf_hash_table (info->hash)) | |
6824 | return FALSE; | |
6825 | ||
9865bd0d | 6826 | bed = get_elf_backend_data (obfd); |
c72f2fb2 | 6827 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
630993ec AM |
6828 | if ((ibfd->flags & DYNAMIC) == 0 |
6829 | && bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
9865bd0d L |
6830 | && (elf_elfheader (ibfd)->e_ident[EI_CLASS] == bed->s->elfclass) |
6831 | && (bed->elf_machine_code == elf_elfheader (ibfd)->e_machine | |
6832 | || (bed->elf_machine_alt1 != 0 | |
6833 | && (bed->elf_machine_alt1 | |
6834 | == elf_elfheader (ibfd)->e_machine)) | |
6835 | || (bed->elf_machine_alt2 != 0 | |
6836 | && (bed->elf_machine_alt2 | |
6837 | == elf_elfheader (ibfd)->e_machine)))) | |
4d269e42 AM |
6838 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
6839 | if ((sec->flags & SEC_MERGE) != 0 | |
6840 | && !bfd_is_abs_section (sec->output_section)) | |
6841 | { | |
6842 | struct bfd_elf_section_data *secdata; | |
6843 | ||
6844 | secdata = elf_section_data (sec); | |
630993ec | 6845 | if (! _bfd_add_merge_section (obfd, |
4d269e42 AM |
6846 | &elf_hash_table (info)->merge_info, |
6847 | sec, &secdata->sec_info)) | |
6848 | return FALSE; | |
6849 | else if (secdata->sec_info) | |
dbaa2011 | 6850 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
6851 | } |
6852 | ||
6853 | if (elf_hash_table (info)->merge_info != NULL) | |
630993ec | 6854 | _bfd_merge_sections (obfd, info, elf_hash_table (info)->merge_info, |
4d269e42 AM |
6855 | merge_sections_remove_hook); |
6856 | return TRUE; | |
6857 | } | |
6858 | ||
6859 | /* Create an entry in an ELF linker hash table. */ | |
6860 | ||
6861 | struct bfd_hash_entry * | |
6862 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
6863 | struct bfd_hash_table *table, | |
6864 | const char *string) | |
6865 | { | |
6866 | /* Allocate the structure if it has not already been allocated by a | |
6867 | subclass. */ | |
6868 | if (entry == NULL) | |
6869 | { | |
a50b1753 | 6870 | entry = (struct bfd_hash_entry *) |
ca4be51c | 6871 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); |
4d269e42 AM |
6872 | if (entry == NULL) |
6873 | return entry; | |
6874 | } | |
6875 | ||
6876 | /* Call the allocation method of the superclass. */ | |
6877 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
6878 | if (entry != NULL) | |
6879 | { | |
6880 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
6881 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
6882 | ||
6883 | /* Set local fields. */ | |
6884 | ret->indx = -1; | |
6885 | ret->dynindx = -1; | |
6886 | ret->got = htab->init_got_refcount; | |
6887 | ret->plt = htab->init_plt_refcount; | |
6888 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
6889 | - offsetof (struct elf_link_hash_entry, size))); | |
6890 | /* Assume that we have been called by a non-ELF symbol reader. | |
6891 | This flag is then reset by the code which reads an ELF input | |
6892 | file. This ensures that a symbol created by a non-ELF symbol | |
6893 | reader will have the flag set correctly. */ | |
6894 | ret->non_elf = 1; | |
6895 | } | |
6896 | ||
6897 | return entry; | |
6898 | } | |
6899 | ||
6900 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
6901 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
6902 | ||
6903 | void | |
6904 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
6905 | struct elf_link_hash_entry *dir, | |
6906 | struct elf_link_hash_entry *ind) | |
6907 | { | |
6908 | struct elf_link_hash_table *htab; | |
6909 | ||
6910 | /* Copy down any references that we may have already seen to the | |
6e33951e L |
6911 | symbol which just became indirect if DIR isn't a hidden versioned |
6912 | symbol. */ | |
4d269e42 | 6913 | |
422f1182 | 6914 | if (dir->versioned != versioned_hidden) |
6e33951e L |
6915 | { |
6916 | dir->ref_dynamic |= ind->ref_dynamic; | |
6917 | dir->ref_regular |= ind->ref_regular; | |
6918 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
6919 | dir->non_got_ref |= ind->non_got_ref; | |
6920 | dir->needs_plt |= ind->needs_plt; | |
6921 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
6922 | } | |
4d269e42 AM |
6923 | |
6924 | if (ind->root.type != bfd_link_hash_indirect) | |
6925 | return; | |
6926 | ||
6927 | /* Copy over the global and procedure linkage table refcount entries. | |
6928 | These may have been already set up by a check_relocs routine. */ | |
6929 | htab = elf_hash_table (info); | |
6930 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
6931 | { | |
6932 | if (dir->got.refcount < 0) | |
6933 | dir->got.refcount = 0; | |
6934 | dir->got.refcount += ind->got.refcount; | |
6935 | ind->got.refcount = htab->init_got_refcount.refcount; | |
6936 | } | |
6937 | ||
6938 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
6939 | { | |
6940 | if (dir->plt.refcount < 0) | |
6941 | dir->plt.refcount = 0; | |
6942 | dir->plt.refcount += ind->plt.refcount; | |
6943 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
6944 | } | |
6945 | ||
6946 | if (ind->dynindx != -1) | |
6947 | { | |
6948 | if (dir->dynindx != -1) | |
6949 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
6950 | dir->dynindx = ind->dynindx; | |
6951 | dir->dynstr_index = ind->dynstr_index; | |
6952 | ind->dynindx = -1; | |
6953 | ind->dynstr_index = 0; | |
6954 | } | |
6955 | } | |
6956 | ||
6957 | void | |
6958 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
6959 | struct elf_link_hash_entry *h, | |
6960 | bfd_boolean force_local) | |
6961 | { | |
3aa14d16 L |
6962 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
6963 | if (h->type != STT_GNU_IFUNC) | |
6964 | { | |
6965 | h->plt = elf_hash_table (info)->init_plt_offset; | |
6966 | h->needs_plt = 0; | |
6967 | } | |
4d269e42 AM |
6968 | if (force_local) |
6969 | { | |
6970 | h->forced_local = 1; | |
6971 | if (h->dynindx != -1) | |
6972 | { | |
6973 | h->dynindx = -1; | |
6974 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
6975 | h->dynstr_index); | |
6976 | } | |
6977 | } | |
6978 | } | |
6979 | ||
7bf52ea2 AM |
6980 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
6981 | caller. */ | |
4d269e42 AM |
6982 | |
6983 | bfd_boolean | |
6984 | _bfd_elf_link_hash_table_init | |
6985 | (struct elf_link_hash_table *table, | |
6986 | bfd *abfd, | |
6987 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
6988 | struct bfd_hash_table *, | |
6989 | const char *), | |
4dfe6ac6 NC |
6990 | unsigned int entsize, |
6991 | enum elf_target_id target_id) | |
4d269e42 AM |
6992 | { |
6993 | bfd_boolean ret; | |
6994 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; | |
6995 | ||
4d269e42 AM |
6996 | table->init_got_refcount.refcount = can_refcount - 1; |
6997 | table->init_plt_refcount.refcount = can_refcount - 1; | |
6998 | table->init_got_offset.offset = -(bfd_vma) 1; | |
6999 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
7000 | /* The first dynamic symbol is a dummy. */ | |
7001 | table->dynsymcount = 1; | |
7002 | ||
7003 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 7004 | |
4d269e42 | 7005 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 7006 | table->hash_table_id = target_id; |
4d269e42 AM |
7007 | |
7008 | return ret; | |
7009 | } | |
7010 | ||
7011 | /* Create an ELF linker hash table. */ | |
7012 | ||
7013 | struct bfd_link_hash_table * | |
7014 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
7015 | { | |
7016 | struct elf_link_hash_table *ret; | |
7017 | bfd_size_type amt = sizeof (struct elf_link_hash_table); | |
7018 | ||
7bf52ea2 | 7019 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
7020 | if (ret == NULL) |
7021 | return NULL; | |
7022 | ||
7023 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
7024 | sizeof (struct elf_link_hash_entry), |
7025 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
7026 | { |
7027 | free (ret); | |
7028 | return NULL; | |
7029 | } | |
d495ab0d | 7030 | ret->root.hash_table_free = _bfd_elf_link_hash_table_free; |
4d269e42 AM |
7031 | |
7032 | return &ret->root; | |
7033 | } | |
7034 | ||
9f7c3e5e AM |
7035 | /* Destroy an ELF linker hash table. */ |
7036 | ||
7037 | void | |
d495ab0d | 7038 | _bfd_elf_link_hash_table_free (bfd *obfd) |
9f7c3e5e | 7039 | { |
d495ab0d AM |
7040 | struct elf_link_hash_table *htab; |
7041 | ||
7042 | htab = (struct elf_link_hash_table *) obfd->link.hash; | |
9f7c3e5e AM |
7043 | if (htab->dynstr != NULL) |
7044 | _bfd_elf_strtab_free (htab->dynstr); | |
7045 | _bfd_merge_sections_free (htab->merge_info); | |
d495ab0d | 7046 | _bfd_generic_link_hash_table_free (obfd); |
9f7c3e5e AM |
7047 | } |
7048 | ||
4d269e42 AM |
7049 | /* This is a hook for the ELF emulation code in the generic linker to |
7050 | tell the backend linker what file name to use for the DT_NEEDED | |
7051 | entry for a dynamic object. */ | |
7052 | ||
7053 | void | |
7054 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
7055 | { | |
7056 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7057 | && bfd_get_format (abfd) == bfd_object) | |
7058 | elf_dt_name (abfd) = name; | |
7059 | } | |
7060 | ||
7061 | int | |
7062 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
7063 | { | |
7064 | int lib_class; | |
7065 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7066 | && bfd_get_format (abfd) == bfd_object) | |
7067 | lib_class = elf_dyn_lib_class (abfd); | |
7068 | else | |
7069 | lib_class = 0; | |
7070 | return lib_class; | |
7071 | } | |
7072 | ||
7073 | void | |
7074 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
7075 | { | |
7076 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7077 | && bfd_get_format (abfd) == bfd_object) | |
7078 | elf_dyn_lib_class (abfd) = lib_class; | |
7079 | } | |
7080 | ||
7081 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
7082 | the linker ELF emulation code. */ | |
7083 | ||
7084 | struct bfd_link_needed_list * | |
7085 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7086 | struct bfd_link_info *info) | |
7087 | { | |
7088 | if (! is_elf_hash_table (info->hash)) | |
7089 | return NULL; | |
7090 | return elf_hash_table (info)->needed; | |
7091 | } | |
7092 | ||
7093 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
7094 | hook for the linker ELF emulation code. */ | |
7095 | ||
7096 | struct bfd_link_needed_list * | |
7097 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
7098 | struct bfd_link_info *info) | |
7099 | { | |
7100 | if (! is_elf_hash_table (info->hash)) | |
7101 | return NULL; | |
7102 | return elf_hash_table (info)->runpath; | |
7103 | } | |
7104 | ||
7105 | /* Get the name actually used for a dynamic object for a link. This | |
7106 | is the SONAME entry if there is one. Otherwise, it is the string | |
7107 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
7108 | ||
7109 | const char * | |
7110 | bfd_elf_get_dt_soname (bfd *abfd) | |
7111 | { | |
7112 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
7113 | && bfd_get_format (abfd) == bfd_object) | |
7114 | return elf_dt_name (abfd); | |
7115 | return NULL; | |
7116 | } | |
7117 | ||
7118 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
7119 | the ELF linker emulation code. */ | |
7120 | ||
7121 | bfd_boolean | |
7122 | bfd_elf_get_bfd_needed_list (bfd *abfd, | |
7123 | struct bfd_link_needed_list **pneeded) | |
7124 | { | |
7125 | asection *s; | |
7126 | bfd_byte *dynbuf = NULL; | |
cb33740c | 7127 | unsigned int elfsec; |
4d269e42 AM |
7128 | unsigned long shlink; |
7129 | bfd_byte *extdyn, *extdynend; | |
7130 | size_t extdynsize; | |
7131 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
7132 | ||
7133 | *pneeded = NULL; | |
7134 | ||
7135 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
7136 | || bfd_get_format (abfd) != bfd_object) | |
7137 | return TRUE; | |
7138 | ||
7139 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
7140 | if (s == NULL || s->size == 0) | |
7141 | return TRUE; | |
7142 | ||
7143 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
7144 | goto error_return; | |
7145 | ||
7146 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 7147 | if (elfsec == SHN_BAD) |
4d269e42 AM |
7148 | goto error_return; |
7149 | ||
7150 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 7151 | |
4d269e42 AM |
7152 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
7153 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
7154 | ||
7155 | extdyn = dynbuf; | |
7156 | extdynend = extdyn + s->size; | |
7157 | for (; extdyn < extdynend; extdyn += extdynsize) | |
7158 | { | |
7159 | Elf_Internal_Dyn dyn; | |
7160 | ||
7161 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
7162 | ||
7163 | if (dyn.d_tag == DT_NULL) | |
7164 | break; | |
7165 | ||
7166 | if (dyn.d_tag == DT_NEEDED) | |
7167 | { | |
7168 | const char *string; | |
7169 | struct bfd_link_needed_list *l; | |
7170 | unsigned int tagv = dyn.d_un.d_val; | |
7171 | bfd_size_type amt; | |
7172 | ||
7173 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
7174 | if (string == NULL) | |
7175 | goto error_return; | |
7176 | ||
7177 | amt = sizeof *l; | |
a50b1753 | 7178 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
7179 | if (l == NULL) |
7180 | goto error_return; | |
7181 | ||
7182 | l->by = abfd; | |
7183 | l->name = string; | |
7184 | l->next = *pneeded; | |
7185 | *pneeded = l; | |
7186 | } | |
7187 | } | |
7188 | ||
7189 | free (dynbuf); | |
7190 | ||
7191 | return TRUE; | |
7192 | ||
7193 | error_return: | |
7194 | if (dynbuf != NULL) | |
7195 | free (dynbuf); | |
7196 | return FALSE; | |
7197 | } | |
7198 | ||
7199 | struct elf_symbuf_symbol | |
7200 | { | |
7201 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
7202 | unsigned char st_info; /* Type and binding attributes */ | |
7203 | unsigned char st_other; /* Visibilty, and target specific */ | |
7204 | }; | |
7205 | ||
7206 | struct elf_symbuf_head | |
7207 | { | |
7208 | struct elf_symbuf_symbol *ssym; | |
7209 | bfd_size_type count; | |
7210 | unsigned int st_shndx; | |
7211 | }; | |
7212 | ||
7213 | struct elf_symbol | |
7214 | { | |
7215 | union | |
7216 | { | |
7217 | Elf_Internal_Sym *isym; | |
7218 | struct elf_symbuf_symbol *ssym; | |
7219 | } u; | |
7220 | const char *name; | |
7221 | }; | |
7222 | ||
7223 | /* Sort references to symbols by ascending section number. */ | |
7224 | ||
7225 | static int | |
7226 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
7227 | { | |
7228 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
7229 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
7230 | ||
7231 | return s1->st_shndx - s2->st_shndx; | |
7232 | } | |
7233 | ||
7234 | static int | |
7235 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
7236 | { | |
7237 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
7238 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
7239 | return strcmp (s1->name, s2->name); | |
7240 | } | |
7241 | ||
7242 | static struct elf_symbuf_head * | |
7243 | elf_create_symbuf (bfd_size_type symcount, Elf_Internal_Sym *isymbuf) | |
7244 | { | |
14b1c01e | 7245 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
7246 | struct elf_symbuf_symbol *ssym; |
7247 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
3ae181ee | 7248 | bfd_size_type i, shndx_count, total_size; |
4d269e42 | 7249 | |
a50b1753 | 7250 | indbuf = (Elf_Internal_Sym **) bfd_malloc2 (symcount, sizeof (*indbuf)); |
4d269e42 AM |
7251 | if (indbuf == NULL) |
7252 | return NULL; | |
7253 | ||
7254 | for (ind = indbuf, i = 0; i < symcount; i++) | |
7255 | if (isymbuf[i].st_shndx != SHN_UNDEF) | |
7256 | *ind++ = &isymbuf[i]; | |
7257 | indbufend = ind; | |
7258 | ||
7259 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
7260 | elf_sort_elf_symbol); | |
7261 | ||
7262 | shndx_count = 0; | |
7263 | if (indbufend > indbuf) | |
7264 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
7265 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
7266 | shndx_count++; | |
7267 | ||
3ae181ee L |
7268 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
7269 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 7270 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
7271 | if (ssymbuf == NULL) |
7272 | { | |
7273 | free (indbuf); | |
7274 | return NULL; | |
7275 | } | |
7276 | ||
3ae181ee | 7277 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
7278 | ssymbuf->ssym = NULL; |
7279 | ssymbuf->count = shndx_count; | |
7280 | ssymbuf->st_shndx = 0; | |
7281 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
7282 | { | |
7283 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
7284 | { | |
7285 | ssymhead++; | |
7286 | ssymhead->ssym = ssym; | |
7287 | ssymhead->count = 0; | |
7288 | ssymhead->st_shndx = (*ind)->st_shndx; | |
7289 | } | |
7290 | ssym->st_name = (*ind)->st_name; | |
7291 | ssym->st_info = (*ind)->st_info; | |
7292 | ssym->st_other = (*ind)->st_other; | |
7293 | ssymhead->count++; | |
7294 | } | |
3ae181ee L |
7295 | BFD_ASSERT ((bfd_size_type) (ssymhead - ssymbuf) == shndx_count |
7296 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) | |
7297 | == total_size)); | |
4d269e42 AM |
7298 | |
7299 | free (indbuf); | |
7300 | return ssymbuf; | |
7301 | } | |
7302 | ||
7303 | /* Check if 2 sections define the same set of local and global | |
7304 | symbols. */ | |
7305 | ||
8f317e31 | 7306 | static bfd_boolean |
4d269e42 AM |
7307 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
7308 | struct bfd_link_info *info) | |
7309 | { | |
7310 | bfd *bfd1, *bfd2; | |
7311 | const struct elf_backend_data *bed1, *bed2; | |
7312 | Elf_Internal_Shdr *hdr1, *hdr2; | |
7313 | bfd_size_type symcount1, symcount2; | |
7314 | Elf_Internal_Sym *isymbuf1, *isymbuf2; | |
7315 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
7316 | Elf_Internal_Sym *isym, *isymend; | |
7317 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
7318 | bfd_size_type count1, count2, i; | |
cb33740c | 7319 | unsigned int shndx1, shndx2; |
4d269e42 AM |
7320 | bfd_boolean result; |
7321 | ||
7322 | bfd1 = sec1->owner; | |
7323 | bfd2 = sec2->owner; | |
7324 | ||
4d269e42 AM |
7325 | /* Both sections have to be in ELF. */ |
7326 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
7327 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
7328 | return FALSE; | |
7329 | ||
7330 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
7331 | return FALSE; | |
7332 | ||
4d269e42 AM |
7333 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
7334 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 7335 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
4d269e42 AM |
7336 | return FALSE; |
7337 | ||
7338 | bed1 = get_elf_backend_data (bfd1); | |
7339 | bed2 = get_elf_backend_data (bfd2); | |
7340 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
7341 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
7342 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
7343 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
7344 | ||
7345 | if (symcount1 == 0 || symcount2 == 0) | |
7346 | return FALSE; | |
7347 | ||
7348 | result = FALSE; | |
7349 | isymbuf1 = NULL; | |
7350 | isymbuf2 = NULL; | |
a50b1753 NC |
7351 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
7352 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 AM |
7353 | |
7354 | if (ssymbuf1 == NULL) | |
7355 | { | |
7356 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
7357 | NULL, NULL, NULL); | |
7358 | if (isymbuf1 == NULL) | |
7359 | goto done; | |
7360 | ||
7361 | if (!info->reduce_memory_overheads) | |
7362 | elf_tdata (bfd1)->symbuf = ssymbuf1 | |
7363 | = elf_create_symbuf (symcount1, isymbuf1); | |
7364 | } | |
7365 | ||
7366 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
7367 | { | |
7368 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
7369 | NULL, NULL, NULL); | |
7370 | if (isymbuf2 == NULL) | |
7371 | goto done; | |
7372 | ||
7373 | if (ssymbuf1 != NULL && !info->reduce_memory_overheads) | |
7374 | elf_tdata (bfd2)->symbuf = ssymbuf2 | |
7375 | = elf_create_symbuf (symcount2, isymbuf2); | |
7376 | } | |
7377 | ||
7378 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
7379 | { | |
7380 | /* Optimized faster version. */ | |
7381 | bfd_size_type lo, hi, mid; | |
7382 | struct elf_symbol *symp; | |
7383 | struct elf_symbuf_symbol *ssym, *ssymend; | |
7384 | ||
7385 | lo = 0; | |
7386 | hi = ssymbuf1->count; | |
7387 | ssymbuf1++; | |
7388 | count1 = 0; | |
7389 | while (lo < hi) | |
7390 | { | |
7391 | mid = (lo + hi) / 2; | |
cb33740c | 7392 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 7393 | hi = mid; |
cb33740c | 7394 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
7395 | lo = mid + 1; |
7396 | else | |
7397 | { | |
7398 | count1 = ssymbuf1[mid].count; | |
7399 | ssymbuf1 += mid; | |
7400 | break; | |
7401 | } | |
7402 | } | |
7403 | ||
7404 | lo = 0; | |
7405 | hi = ssymbuf2->count; | |
7406 | ssymbuf2++; | |
7407 | count2 = 0; | |
7408 | while (lo < hi) | |
7409 | { | |
7410 | mid = (lo + hi) / 2; | |
cb33740c | 7411 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 7412 | hi = mid; |
cb33740c | 7413 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
7414 | lo = mid + 1; |
7415 | else | |
7416 | { | |
7417 | count2 = ssymbuf2[mid].count; | |
7418 | ssymbuf2 += mid; | |
7419 | break; | |
7420 | } | |
7421 | } | |
7422 | ||
7423 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7424 | goto done; | |
7425 | ||
ca4be51c AM |
7426 | symtable1 |
7427 | = (struct elf_symbol *) bfd_malloc (count1 * sizeof (*symtable1)); | |
7428 | symtable2 | |
7429 | = (struct elf_symbol *) bfd_malloc (count2 * sizeof (*symtable2)); | |
4d269e42 AM |
7430 | if (symtable1 == NULL || symtable2 == NULL) |
7431 | goto done; | |
7432 | ||
7433 | symp = symtable1; | |
7434 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1; | |
7435 | ssym < ssymend; ssym++, symp++) | |
7436 | { | |
7437 | symp->u.ssym = ssym; | |
7438 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
7439 | hdr1->sh_link, | |
7440 | ssym->st_name); | |
7441 | } | |
7442 | ||
7443 | symp = symtable2; | |
7444 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2; | |
7445 | ssym < ssymend; ssym++, symp++) | |
7446 | { | |
7447 | symp->u.ssym = ssym; | |
7448 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
7449 | hdr2->sh_link, | |
7450 | ssym->st_name); | |
7451 | } | |
7452 | ||
7453 | /* Sort symbol by name. */ | |
7454 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7455 | elf_sym_name_compare); | |
7456 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7457 | elf_sym_name_compare); | |
7458 | ||
7459 | for (i = 0; i < count1; i++) | |
7460 | /* Two symbols must have the same binding, type and name. */ | |
7461 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
7462 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
7463 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7464 | goto done; | |
7465 | ||
7466 | result = TRUE; | |
7467 | goto done; | |
7468 | } | |
7469 | ||
a50b1753 NC |
7470 | symtable1 = (struct elf_symbol *) |
7471 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
7472 | symtable2 = (struct elf_symbol *) | |
7473 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7474 | if (symtable1 == NULL || symtable2 == NULL) |
7475 | goto done; | |
7476 | ||
7477 | /* Count definitions in the section. */ | |
7478 | count1 = 0; | |
7479 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
cb33740c | 7480 | if (isym->st_shndx == shndx1) |
4d269e42 AM |
7481 | symtable1[count1++].u.isym = isym; |
7482 | ||
7483 | count2 = 0; | |
7484 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
cb33740c | 7485 | if (isym->st_shndx == shndx2) |
4d269e42 AM |
7486 | symtable2[count2++].u.isym = isym; |
7487 | ||
7488 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7489 | goto done; | |
7490 | ||
7491 | for (i = 0; i < count1; i++) | |
7492 | symtable1[i].name | |
7493 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
7494 | symtable1[i].u.isym->st_name); | |
7495 | ||
7496 | for (i = 0; i < count2; i++) | |
7497 | symtable2[i].name | |
7498 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
7499 | symtable2[i].u.isym->st_name); | |
7500 | ||
7501 | /* Sort symbol by name. */ | |
7502 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7503 | elf_sym_name_compare); | |
7504 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7505 | elf_sym_name_compare); | |
7506 | ||
7507 | for (i = 0; i < count1; i++) | |
7508 | /* Two symbols must have the same binding, type and name. */ | |
7509 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
7510 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
7511 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7512 | goto done; | |
7513 | ||
7514 | result = TRUE; | |
7515 | ||
7516 | done: | |
7517 | if (symtable1) | |
7518 | free (symtable1); | |
7519 | if (symtable2) | |
7520 | free (symtable2); | |
7521 | if (isymbuf1) | |
7522 | free (isymbuf1); | |
7523 | if (isymbuf2) | |
7524 | free (isymbuf2); | |
7525 | ||
7526 | return result; | |
7527 | } | |
7528 | ||
7529 | /* Return TRUE if 2 section types are compatible. */ | |
7530 | ||
7531 | bfd_boolean | |
7532 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, | |
7533 | bfd *bbfd, const asection *bsec) | |
7534 | { | |
7535 | if (asec == NULL | |
7536 | || bsec == NULL | |
7537 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
7538 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
7539 | return TRUE; | |
7540 | ||
7541 | return elf_section_type (asec) == elf_section_type (bsec); | |
7542 | } | |
7543 | \f | |
c152c796 AM |
7544 | /* Final phase of ELF linker. */ |
7545 | ||
7546 | /* A structure we use to avoid passing large numbers of arguments. */ | |
7547 | ||
7548 | struct elf_final_link_info | |
7549 | { | |
7550 | /* General link information. */ | |
7551 | struct bfd_link_info *info; | |
7552 | /* Output BFD. */ | |
7553 | bfd *output_bfd; | |
7554 | /* Symbol string table. */ | |
ef10c3ac | 7555 | struct elf_strtab_hash *symstrtab; |
c152c796 AM |
7556 | /* .hash section. */ |
7557 | asection *hash_sec; | |
7558 | /* symbol version section (.gnu.version). */ | |
7559 | asection *symver_sec; | |
7560 | /* Buffer large enough to hold contents of any section. */ | |
7561 | bfd_byte *contents; | |
7562 | /* Buffer large enough to hold external relocs of any section. */ | |
7563 | void *external_relocs; | |
7564 | /* Buffer large enough to hold internal relocs of any section. */ | |
7565 | Elf_Internal_Rela *internal_relocs; | |
7566 | /* Buffer large enough to hold external local symbols of any input | |
7567 | BFD. */ | |
7568 | bfd_byte *external_syms; | |
7569 | /* And a buffer for symbol section indices. */ | |
7570 | Elf_External_Sym_Shndx *locsym_shndx; | |
7571 | /* Buffer large enough to hold internal local symbols of any input | |
7572 | BFD. */ | |
7573 | Elf_Internal_Sym *internal_syms; | |
7574 | /* Array large enough to hold a symbol index for each local symbol | |
7575 | of any input BFD. */ | |
7576 | long *indices; | |
7577 | /* Array large enough to hold a section pointer for each local | |
7578 | symbol of any input BFD. */ | |
7579 | asection **sections; | |
ef10c3ac | 7580 | /* Buffer for SHT_SYMTAB_SHNDX section. */ |
c152c796 | 7581 | Elf_External_Sym_Shndx *symshndxbuf; |
ffbc01cc AM |
7582 | /* Number of STT_FILE syms seen. */ |
7583 | size_t filesym_count; | |
c152c796 AM |
7584 | }; |
7585 | ||
7586 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
7587 | ||
7588 | struct elf_outext_info | |
7589 | { | |
7590 | bfd_boolean failed; | |
7591 | bfd_boolean localsyms; | |
34a79995 | 7592 | bfd_boolean file_sym_done; |
8b127cbc | 7593 | struct elf_final_link_info *flinfo; |
c152c796 AM |
7594 | }; |
7595 | ||
d9352518 DB |
7596 | |
7597 | /* Support for evaluating a complex relocation. | |
7598 | ||
7599 | Complex relocations are generalized, self-describing relocations. The | |
7600 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 7601 | relocations themselves. |
d9352518 DB |
7602 | |
7603 | The relocations are use a reserved elf-wide relocation type code (R_RELC | |
7604 | external / BFD_RELOC_RELC internal) and an encoding of relocation field | |
7605 | information (start bit, end bit, word width, etc) into the addend. This | |
7606 | information is extracted from CGEN-generated operand tables within gas. | |
7607 | ||
7608 | Complex symbols are mangled symbols (BSF_RELC external / STT_RELC | |
7609 | internal) representing prefix-notation expressions, including but not | |
7610 | limited to those sorts of expressions normally encoded as addends in the | |
7611 | addend field. The symbol mangling format is: | |
7612 | ||
7613 | <node> := <literal> | |
7614 | | <unary-operator> ':' <node> | |
7615 | | <binary-operator> ':' <node> ':' <node> | |
7616 | ; | |
7617 | ||
7618 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
7619 | | 'S' <digits=N> ':' <N character section name> | |
7620 | | '#' <hexdigits> | |
7621 | ; | |
7622 | ||
7623 | <binary-operator> := as in C | |
7624 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
7625 | ||
7626 | static void | |
a0c8462f AM |
7627 | set_symbol_value (bfd *bfd_with_globals, |
7628 | Elf_Internal_Sym *isymbuf, | |
7629 | size_t locsymcount, | |
7630 | size_t symidx, | |
7631 | bfd_vma val) | |
d9352518 | 7632 | { |
8977835c AM |
7633 | struct elf_link_hash_entry **sym_hashes; |
7634 | struct elf_link_hash_entry *h; | |
7635 | size_t extsymoff = locsymcount; | |
d9352518 | 7636 | |
8977835c | 7637 | if (symidx < locsymcount) |
d9352518 | 7638 | { |
8977835c AM |
7639 | Elf_Internal_Sym *sym; |
7640 | ||
7641 | sym = isymbuf + symidx; | |
7642 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
7643 | { | |
7644 | /* It is a local symbol: move it to the | |
7645 | "absolute" section and give it a value. */ | |
7646 | sym->st_shndx = SHN_ABS; | |
7647 | sym->st_value = val; | |
7648 | return; | |
7649 | } | |
7650 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
7651 | extsymoff = 0; | |
d9352518 | 7652 | } |
8977835c AM |
7653 | |
7654 | /* It is a global symbol: set its link type | |
7655 | to "defined" and give it a value. */ | |
7656 | ||
7657 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
7658 | h = sym_hashes [symidx - extsymoff]; | |
7659 | while (h->root.type == bfd_link_hash_indirect | |
7660 | || h->root.type == bfd_link_hash_warning) | |
7661 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7662 | h->root.type = bfd_link_hash_defined; | |
7663 | h->root.u.def.value = val; | |
7664 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
7665 | } |
7666 | ||
a0c8462f AM |
7667 | static bfd_boolean |
7668 | resolve_symbol (const char *name, | |
7669 | bfd *input_bfd, | |
8b127cbc | 7670 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7671 | bfd_vma *result, |
7672 | Elf_Internal_Sym *isymbuf, | |
7673 | size_t locsymcount) | |
d9352518 | 7674 | { |
a0c8462f AM |
7675 | Elf_Internal_Sym *sym; |
7676 | struct bfd_link_hash_entry *global_entry; | |
7677 | const char *candidate = NULL; | |
7678 | Elf_Internal_Shdr *symtab_hdr; | |
7679 | size_t i; | |
7680 | ||
d9352518 DB |
7681 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
7682 | ||
7683 | for (i = 0; i < locsymcount; ++ i) | |
7684 | { | |
8977835c | 7685 | sym = isymbuf + i; |
d9352518 DB |
7686 | |
7687 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
7688 | continue; | |
7689 | ||
7690 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
7691 | symtab_hdr->sh_link, | |
7692 | sym->st_name); | |
7693 | #ifdef DEBUG | |
0f02bbd9 AM |
7694 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
7695 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
7696 | #endif |
7697 | if (candidate && strcmp (candidate, name) == 0) | |
7698 | { | |
8b127cbc | 7699 | asection *sec = flinfo->sections [i]; |
d9352518 | 7700 | |
0f02bbd9 AM |
7701 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
7702 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 7703 | #ifdef DEBUG |
0f02bbd9 AM |
7704 | printf ("Found symbol with value %8.8lx\n", |
7705 | (unsigned long) *result); | |
d9352518 DB |
7706 | #endif |
7707 | return TRUE; | |
7708 | } | |
7709 | } | |
7710 | ||
7711 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 7712 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
a0c8462f | 7713 | FALSE, FALSE, TRUE); |
d9352518 DB |
7714 | if (!global_entry) |
7715 | return FALSE; | |
a0c8462f | 7716 | |
d9352518 DB |
7717 | if (global_entry->type == bfd_link_hash_defined |
7718 | || global_entry->type == bfd_link_hash_defweak) | |
7719 | { | |
a0c8462f AM |
7720 | *result = (global_entry->u.def.value |
7721 | + global_entry->u.def.section->output_section->vma | |
7722 | + global_entry->u.def.section->output_offset); | |
d9352518 | 7723 | #ifdef DEBUG |
0f02bbd9 AM |
7724 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
7725 | global_entry->root.string, (unsigned long) *result); | |
d9352518 DB |
7726 | #endif |
7727 | return TRUE; | |
a0c8462f | 7728 | } |
d9352518 | 7729 | |
d9352518 DB |
7730 | return FALSE; |
7731 | } | |
7732 | ||
7733 | static bfd_boolean | |
a0c8462f AM |
7734 | resolve_section (const char *name, |
7735 | asection *sections, | |
7736 | bfd_vma *result) | |
d9352518 | 7737 | { |
a0c8462f AM |
7738 | asection *curr; |
7739 | unsigned int len; | |
d9352518 | 7740 | |
a0c8462f | 7741 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7742 | if (strcmp (curr->name, name) == 0) |
7743 | { | |
7744 | *result = curr->vma; | |
7745 | return TRUE; | |
7746 | } | |
7747 | ||
7748 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
a0c8462f | 7749 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7750 | { |
7751 | len = strlen (curr->name); | |
a0c8462f | 7752 | if (len > strlen (name)) |
d9352518 DB |
7753 | continue; |
7754 | ||
7755 | if (strncmp (curr->name, name, len) == 0) | |
7756 | { | |
7757 | if (strncmp (".end", name + len, 4) == 0) | |
7758 | { | |
7759 | *result = curr->vma + curr->size; | |
7760 | return TRUE; | |
7761 | } | |
7762 | ||
7763 | /* Insert more pseudo-section names here, if you like. */ | |
7764 | } | |
7765 | } | |
a0c8462f | 7766 | |
d9352518 DB |
7767 | return FALSE; |
7768 | } | |
7769 | ||
7770 | static void | |
a0c8462f | 7771 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 7772 | { |
a0c8462f AM |
7773 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
7774 | reftype, name); | |
d9352518 DB |
7775 | } |
7776 | ||
7777 | static bfd_boolean | |
a0c8462f AM |
7778 | eval_symbol (bfd_vma *result, |
7779 | const char **symp, | |
7780 | bfd *input_bfd, | |
8b127cbc | 7781 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7782 | bfd_vma dot, |
7783 | Elf_Internal_Sym *isymbuf, | |
7784 | size_t locsymcount, | |
7785 | int signed_p) | |
d9352518 | 7786 | { |
4b93929b NC |
7787 | size_t len; |
7788 | size_t symlen; | |
a0c8462f AM |
7789 | bfd_vma a; |
7790 | bfd_vma b; | |
4b93929b | 7791 | char symbuf[4096]; |
0f02bbd9 | 7792 | const char *sym = *symp; |
a0c8462f AM |
7793 | const char *symend; |
7794 | bfd_boolean symbol_is_section = FALSE; | |
d9352518 DB |
7795 | |
7796 | len = strlen (sym); | |
7797 | symend = sym + len; | |
7798 | ||
4b93929b | 7799 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
7800 | { |
7801 | bfd_set_error (bfd_error_invalid_operation); | |
7802 | return FALSE; | |
7803 | } | |
a0c8462f | 7804 | |
d9352518 DB |
7805 | switch (* sym) |
7806 | { | |
7807 | case '.': | |
0f02bbd9 AM |
7808 | *result = dot; |
7809 | *symp = sym + 1; | |
d9352518 DB |
7810 | return TRUE; |
7811 | ||
7812 | case '#': | |
0f02bbd9 AM |
7813 | ++sym; |
7814 | *result = strtoul (sym, (char **) symp, 16); | |
d9352518 DB |
7815 | return TRUE; |
7816 | ||
7817 | case 'S': | |
7818 | symbol_is_section = TRUE; | |
a0c8462f | 7819 | case 's': |
0f02bbd9 AM |
7820 | ++sym; |
7821 | symlen = strtol (sym, (char **) symp, 10); | |
7822 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 7823 | |
4b93929b | 7824 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
7825 | { |
7826 | bfd_set_error (bfd_error_invalid_operation); | |
7827 | return FALSE; | |
7828 | } | |
7829 | ||
7830 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 7831 | symbuf[symlen] = '\0'; |
0f02bbd9 | 7832 | *symp = sym + symlen; |
a0c8462f AM |
7833 | |
7834 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
7835 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
7836 | interpretation here; section means "try section first", not "must be a | |
7837 | section", and likewise with symbol. */ | |
7838 | ||
a0c8462f | 7839 | if (symbol_is_section) |
d9352518 | 7840 | { |
8b127cbc AM |
7841 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result) |
7842 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, | |
8977835c | 7843 | isymbuf, locsymcount)) |
d9352518 DB |
7844 | { |
7845 | undefined_reference ("section", symbuf); | |
7846 | return FALSE; | |
7847 | } | |
a0c8462f AM |
7848 | } |
7849 | else | |
d9352518 | 7850 | { |
8b127cbc | 7851 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 7852 | isymbuf, locsymcount) |
8b127cbc | 7853 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
8977835c | 7854 | result)) |
d9352518 DB |
7855 | { |
7856 | undefined_reference ("symbol", symbuf); | |
7857 | return FALSE; | |
7858 | } | |
7859 | } | |
7860 | ||
7861 | return TRUE; | |
a0c8462f | 7862 | |
d9352518 DB |
7863 | /* All that remains are operators. */ |
7864 | ||
7865 | #define UNARY_OP(op) \ | |
7866 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7867 | { \ | |
7868 | sym += strlen (#op); \ | |
a0c8462f AM |
7869 | if (*sym == ':') \ |
7870 | ++sym; \ | |
0f02bbd9 | 7871 | *symp = sym; \ |
8b127cbc | 7872 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7873 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7874 | return FALSE; \ |
7875 | if (signed_p) \ | |
0f02bbd9 | 7876 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
7877 | else \ |
7878 | *result = op a; \ | |
d9352518 DB |
7879 | return TRUE; \ |
7880 | } | |
7881 | ||
7882 | #define BINARY_OP(op) \ | |
7883 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7884 | { \ | |
7885 | sym += strlen (#op); \ | |
a0c8462f AM |
7886 | if (*sym == ':') \ |
7887 | ++sym; \ | |
0f02bbd9 | 7888 | *symp = sym; \ |
8b127cbc | 7889 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7890 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f | 7891 | return FALSE; \ |
0f02bbd9 | 7892 | ++*symp; \ |
8b127cbc | 7893 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7894 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7895 | return FALSE; \ |
7896 | if (signed_p) \ | |
0f02bbd9 | 7897 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
7898 | else \ |
7899 | *result = a op b; \ | |
d9352518 DB |
7900 | return TRUE; \ |
7901 | } | |
7902 | ||
7903 | default: | |
7904 | UNARY_OP (0-); | |
7905 | BINARY_OP (<<); | |
7906 | BINARY_OP (>>); | |
7907 | BINARY_OP (==); | |
7908 | BINARY_OP (!=); | |
7909 | BINARY_OP (<=); | |
7910 | BINARY_OP (>=); | |
7911 | BINARY_OP (&&); | |
7912 | BINARY_OP (||); | |
7913 | UNARY_OP (~); | |
7914 | UNARY_OP (!); | |
7915 | BINARY_OP (*); | |
7916 | BINARY_OP (/); | |
7917 | BINARY_OP (%); | |
7918 | BINARY_OP (^); | |
7919 | BINARY_OP (|); | |
7920 | BINARY_OP (&); | |
7921 | BINARY_OP (+); | |
7922 | BINARY_OP (-); | |
7923 | BINARY_OP (<); | |
7924 | BINARY_OP (>); | |
7925 | #undef UNARY_OP | |
7926 | #undef BINARY_OP | |
7927 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
7928 | bfd_set_error (bfd_error_invalid_operation); | |
7929 | return FALSE; | |
7930 | } | |
7931 | } | |
7932 | ||
d9352518 | 7933 | static void |
a0c8462f AM |
7934 | put_value (bfd_vma size, |
7935 | unsigned long chunksz, | |
7936 | bfd *input_bfd, | |
7937 | bfd_vma x, | |
7938 | bfd_byte *location) | |
d9352518 DB |
7939 | { |
7940 | location += (size - chunksz); | |
7941 | ||
41cd1ad1 | 7942 | for (; size; size -= chunksz, location -= chunksz) |
d9352518 DB |
7943 | { |
7944 | switch (chunksz) | |
7945 | { | |
d9352518 DB |
7946 | case 1: |
7947 | bfd_put_8 (input_bfd, x, location); | |
41cd1ad1 | 7948 | x >>= 8; |
d9352518 DB |
7949 | break; |
7950 | case 2: | |
7951 | bfd_put_16 (input_bfd, x, location); | |
41cd1ad1 | 7952 | x >>= 16; |
d9352518 DB |
7953 | break; |
7954 | case 4: | |
7955 | bfd_put_32 (input_bfd, x, location); | |
65164438 NC |
7956 | /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */ |
7957 | x >>= 16; | |
7958 | x >>= 16; | |
d9352518 | 7959 | break; |
d9352518 | 7960 | #ifdef BFD64 |
41cd1ad1 | 7961 | case 8: |
d9352518 | 7962 | bfd_put_64 (input_bfd, x, location); |
41cd1ad1 NC |
7963 | /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */ |
7964 | x >>= 32; | |
7965 | x >>= 32; | |
7966 | break; | |
d9352518 | 7967 | #endif |
41cd1ad1 NC |
7968 | default: |
7969 | abort (); | |
d9352518 DB |
7970 | break; |
7971 | } | |
7972 | } | |
7973 | } | |
7974 | ||
a0c8462f AM |
7975 | static bfd_vma |
7976 | get_value (bfd_vma size, | |
7977 | unsigned long chunksz, | |
7978 | bfd *input_bfd, | |
7979 | bfd_byte *location) | |
d9352518 | 7980 | { |
9b239e0e | 7981 | int shift; |
d9352518 DB |
7982 | bfd_vma x = 0; |
7983 | ||
9b239e0e NC |
7984 | /* Sanity checks. */ |
7985 | BFD_ASSERT (chunksz <= sizeof (x) | |
7986 | && size >= chunksz | |
7987 | && chunksz != 0 | |
7988 | && (size % chunksz) == 0 | |
7989 | && input_bfd != NULL | |
7990 | && location != NULL); | |
7991 | ||
7992 | if (chunksz == sizeof (x)) | |
7993 | { | |
7994 | BFD_ASSERT (size == chunksz); | |
7995 | ||
7996 | /* Make sure that we do not perform an undefined shift operation. | |
7997 | We know that size == chunksz so there will only be one iteration | |
7998 | of the loop below. */ | |
7999 | shift = 0; | |
8000 | } | |
8001 | else | |
8002 | shift = 8 * chunksz; | |
8003 | ||
a0c8462f | 8004 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
8005 | { |
8006 | switch (chunksz) | |
8007 | { | |
d9352518 | 8008 | case 1: |
9b239e0e | 8009 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
8010 | break; |
8011 | case 2: | |
9b239e0e | 8012 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
8013 | break; |
8014 | case 4: | |
9b239e0e | 8015 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 8016 | break; |
d9352518 | 8017 | #ifdef BFD64 |
9b239e0e NC |
8018 | case 8: |
8019 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 8020 | break; |
9b239e0e NC |
8021 | #endif |
8022 | default: | |
8023 | abort (); | |
d9352518 DB |
8024 | } |
8025 | } | |
8026 | return x; | |
8027 | } | |
8028 | ||
a0c8462f AM |
8029 | static void |
8030 | decode_complex_addend (unsigned long *start, /* in bits */ | |
8031 | unsigned long *oplen, /* in bits */ | |
8032 | unsigned long *len, /* in bits */ | |
8033 | unsigned long *wordsz, /* in bytes */ | |
8034 | unsigned long *chunksz, /* in bytes */ | |
8035 | unsigned long *lsb0_p, | |
8036 | unsigned long *signed_p, | |
8037 | unsigned long *trunc_p, | |
8038 | unsigned long encoded) | |
d9352518 DB |
8039 | { |
8040 | * start = encoded & 0x3F; | |
8041 | * len = (encoded >> 6) & 0x3F; | |
8042 | * oplen = (encoded >> 12) & 0x3F; | |
8043 | * wordsz = (encoded >> 18) & 0xF; | |
8044 | * chunksz = (encoded >> 22) & 0xF; | |
8045 | * lsb0_p = (encoded >> 27) & 1; | |
8046 | * signed_p = (encoded >> 28) & 1; | |
8047 | * trunc_p = (encoded >> 29) & 1; | |
8048 | } | |
8049 | ||
cdfeee4f | 8050 | bfd_reloc_status_type |
0f02bbd9 | 8051 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
cdfeee4f | 8052 | asection *input_section ATTRIBUTE_UNUSED, |
0f02bbd9 AM |
8053 | bfd_byte *contents, |
8054 | Elf_Internal_Rela *rel, | |
8055 | bfd_vma relocation) | |
d9352518 | 8056 | { |
0f02bbd9 AM |
8057 | bfd_vma shift, x, mask; |
8058 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 8059 | bfd_reloc_status_type r; |
d9352518 DB |
8060 | |
8061 | /* Perform this reloc, since it is complex. | |
8062 | (this is not to say that it necessarily refers to a complex | |
8063 | symbol; merely that it is a self-describing CGEN based reloc. | |
8064 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 8065 | word size, etc) encoded within it.). */ |
d9352518 | 8066 | |
a0c8462f AM |
8067 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
8068 | &chunksz, &lsb0_p, &signed_p, | |
8069 | &trunc_p, rel->r_addend); | |
d9352518 DB |
8070 | |
8071 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
8072 | ||
8073 | if (lsb0_p) | |
8074 | shift = (start + 1) - len; | |
8075 | else | |
8076 | shift = (8 * wordsz) - (start + len); | |
8077 | ||
5dabe785 | 8078 | /* FIXME: octets_per_byte. */ |
a0c8462f | 8079 | x = get_value (wordsz, chunksz, input_bfd, contents + rel->r_offset); |
d9352518 DB |
8080 | |
8081 | #ifdef DEBUG | |
8082 | printf ("Doing complex reloc: " | |
8083 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
8084 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
8085 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
8086 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
8087 | oplen, (unsigned long) x, (unsigned long) mask, |
8088 | (unsigned long) relocation); | |
d9352518 DB |
8089 | #endif |
8090 | ||
cdfeee4f | 8091 | r = bfd_reloc_ok; |
d9352518 | 8092 | if (! trunc_p) |
cdfeee4f AM |
8093 | /* Now do an overflow check. */ |
8094 | r = bfd_check_overflow ((signed_p | |
8095 | ? complain_overflow_signed | |
8096 | : complain_overflow_unsigned), | |
8097 | len, 0, (8 * wordsz), | |
8098 | relocation); | |
a0c8462f | 8099 | |
d9352518 DB |
8100 | /* Do the deed. */ |
8101 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
8102 | ||
8103 | #ifdef DEBUG | |
8104 | printf (" relocation: %8.8lx\n" | |
8105 | " shifted mask: %8.8lx\n" | |
8106 | " shifted/masked reloc: %8.8lx\n" | |
8107 | " result: %8.8lx\n", | |
9ccb8af9 AM |
8108 | (unsigned long) relocation, (unsigned long) (mask << shift), |
8109 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 8110 | #endif |
5dabe785 | 8111 | /* FIXME: octets_per_byte. */ |
d9352518 | 8112 | put_value (wordsz, chunksz, input_bfd, x, contents + rel->r_offset); |
cdfeee4f | 8113 | return r; |
d9352518 DB |
8114 | } |
8115 | ||
0e287786 AM |
8116 | /* Functions to read r_offset from external (target order) reloc |
8117 | entry. Faster than bfd_getl32 et al, because we let the compiler | |
8118 | know the value is aligned. */ | |
53df40a4 | 8119 | |
0e287786 AM |
8120 | static bfd_vma |
8121 | ext32l_r_offset (const void *p) | |
53df40a4 AM |
8122 | { |
8123 | union aligned32 | |
8124 | { | |
8125 | uint32_t v; | |
8126 | unsigned char c[4]; | |
8127 | }; | |
8128 | const union aligned32 *a | |
0e287786 | 8129 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8130 | |
8131 | uint32_t aval = ( (uint32_t) a->c[0] | |
8132 | | (uint32_t) a->c[1] << 8 | |
8133 | | (uint32_t) a->c[2] << 16 | |
8134 | | (uint32_t) a->c[3] << 24); | |
0e287786 | 8135 | return aval; |
53df40a4 AM |
8136 | } |
8137 | ||
0e287786 AM |
8138 | static bfd_vma |
8139 | ext32b_r_offset (const void *p) | |
53df40a4 AM |
8140 | { |
8141 | union aligned32 | |
8142 | { | |
8143 | uint32_t v; | |
8144 | unsigned char c[4]; | |
8145 | }; | |
8146 | const union aligned32 *a | |
0e287786 | 8147 | = (const union aligned32 *) &((const Elf32_External_Rel *) p)->r_offset; |
53df40a4 AM |
8148 | |
8149 | uint32_t aval = ( (uint32_t) a->c[0] << 24 | |
8150 | | (uint32_t) a->c[1] << 16 | |
8151 | | (uint32_t) a->c[2] << 8 | |
8152 | | (uint32_t) a->c[3]); | |
0e287786 | 8153 | return aval; |
53df40a4 AM |
8154 | } |
8155 | ||
8156 | #ifdef BFD_HOST_64_BIT | |
0e287786 AM |
8157 | static bfd_vma |
8158 | ext64l_r_offset (const void *p) | |
53df40a4 AM |
8159 | { |
8160 | union aligned64 | |
8161 | { | |
8162 | uint64_t v; | |
8163 | unsigned char c[8]; | |
8164 | }; | |
8165 | const union aligned64 *a | |
0e287786 | 8166 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8167 | |
8168 | uint64_t aval = ( (uint64_t) a->c[0] | |
8169 | | (uint64_t) a->c[1] << 8 | |
8170 | | (uint64_t) a->c[2] << 16 | |
8171 | | (uint64_t) a->c[3] << 24 | |
8172 | | (uint64_t) a->c[4] << 32 | |
8173 | | (uint64_t) a->c[5] << 40 | |
8174 | | (uint64_t) a->c[6] << 48 | |
8175 | | (uint64_t) a->c[7] << 56); | |
0e287786 | 8176 | return aval; |
53df40a4 AM |
8177 | } |
8178 | ||
0e287786 AM |
8179 | static bfd_vma |
8180 | ext64b_r_offset (const void *p) | |
53df40a4 AM |
8181 | { |
8182 | union aligned64 | |
8183 | { | |
8184 | uint64_t v; | |
8185 | unsigned char c[8]; | |
8186 | }; | |
8187 | const union aligned64 *a | |
0e287786 | 8188 | = (const union aligned64 *) &((const Elf64_External_Rel *) p)->r_offset; |
53df40a4 AM |
8189 | |
8190 | uint64_t aval = ( (uint64_t) a->c[0] << 56 | |
8191 | | (uint64_t) a->c[1] << 48 | |
8192 | | (uint64_t) a->c[2] << 40 | |
8193 | | (uint64_t) a->c[3] << 32 | |
8194 | | (uint64_t) a->c[4] << 24 | |
8195 | | (uint64_t) a->c[5] << 16 | |
8196 | | (uint64_t) a->c[6] << 8 | |
8197 | | (uint64_t) a->c[7]); | |
0e287786 | 8198 | return aval; |
53df40a4 AM |
8199 | } |
8200 | #endif | |
8201 | ||
c152c796 AM |
8202 | /* When performing a relocatable link, the input relocations are |
8203 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
8204 | referenced must be updated. Update all the relocations found in |
8205 | RELDATA. */ | |
c152c796 | 8206 | |
bca6d0e3 | 8207 | static bfd_boolean |
c152c796 | 8208 | elf_link_adjust_relocs (bfd *abfd, |
28dbcedc AM |
8209 | struct bfd_elf_section_reloc_data *reldata, |
8210 | bfd_boolean sort) | |
c152c796 AM |
8211 | { |
8212 | unsigned int i; | |
8213 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8214 | bfd_byte *erela; | |
8215 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8216 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8217 | bfd_vma r_type_mask; | |
8218 | int r_sym_shift; | |
d4730f92 BS |
8219 | unsigned int count = reldata->count; |
8220 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 8221 | |
d4730f92 | 8222 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
8223 | { |
8224 | swap_in = bed->s->swap_reloc_in; | |
8225 | swap_out = bed->s->swap_reloc_out; | |
8226 | } | |
d4730f92 | 8227 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
8228 | { |
8229 | swap_in = bed->s->swap_reloca_in; | |
8230 | swap_out = bed->s->swap_reloca_out; | |
8231 | } | |
8232 | else | |
8233 | abort (); | |
8234 | ||
8235 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
8236 | abort (); | |
8237 | ||
8238 | if (bed->s->arch_size == 32) | |
8239 | { | |
8240 | r_type_mask = 0xff; | |
8241 | r_sym_shift = 8; | |
8242 | } | |
8243 | else | |
8244 | { | |
8245 | r_type_mask = 0xffffffff; | |
8246 | r_sym_shift = 32; | |
8247 | } | |
8248 | ||
d4730f92 BS |
8249 | erela = reldata->hdr->contents; |
8250 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
8251 | { |
8252 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
8253 | unsigned int j; | |
8254 | ||
8255 | if (*rel_hash == NULL) | |
8256 | continue; | |
8257 | ||
8258 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
8259 | ||
8260 | (*swap_in) (abfd, erela, irela); | |
8261 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
8262 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
8263 | | (irela[j].r_info & r_type_mask)); | |
8264 | (*swap_out) (abfd, irela, erela); | |
8265 | } | |
53df40a4 | 8266 | |
0e287786 | 8267 | if (sort && count != 0) |
53df40a4 | 8268 | { |
0e287786 AM |
8269 | bfd_vma (*ext_r_off) (const void *); |
8270 | bfd_vma r_off; | |
8271 | size_t elt_size; | |
8272 | bfd_byte *base, *end, *p, *loc; | |
bca6d0e3 | 8273 | bfd_byte *buf = NULL; |
28dbcedc AM |
8274 | |
8275 | if (bed->s->arch_size == 32) | |
8276 | { | |
8277 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) | |
0e287786 | 8278 | ext_r_off = ext32l_r_offset; |
28dbcedc | 8279 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8280 | ext_r_off = ext32b_r_offset; |
28dbcedc AM |
8281 | else |
8282 | abort (); | |
8283 | } | |
53df40a4 | 8284 | else |
28dbcedc | 8285 | { |
53df40a4 | 8286 | #ifdef BFD_HOST_64_BIT |
28dbcedc | 8287 | if (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE) |
0e287786 | 8288 | ext_r_off = ext64l_r_offset; |
28dbcedc | 8289 | else if (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG) |
0e287786 | 8290 | ext_r_off = ext64b_r_offset; |
28dbcedc | 8291 | else |
53df40a4 | 8292 | #endif |
28dbcedc AM |
8293 | abort (); |
8294 | } | |
0e287786 | 8295 | |
bca6d0e3 AM |
8296 | /* Must use a stable sort here. A modified insertion sort, |
8297 | since the relocs are mostly sorted already. */ | |
0e287786 AM |
8298 | elt_size = reldata->hdr->sh_entsize; |
8299 | base = reldata->hdr->contents; | |
8300 | end = base + count * elt_size; | |
bca6d0e3 | 8301 | if (elt_size > sizeof (Elf64_External_Rela)) |
0e287786 AM |
8302 | abort (); |
8303 | ||
8304 | /* Ensure the first element is lowest. This acts as a sentinel, | |
8305 | speeding the main loop below. */ | |
8306 | r_off = (*ext_r_off) (base); | |
8307 | for (p = loc = base; (p += elt_size) < end; ) | |
8308 | { | |
8309 | bfd_vma r_off2 = (*ext_r_off) (p); | |
8310 | if (r_off > r_off2) | |
8311 | { | |
8312 | r_off = r_off2; | |
8313 | loc = p; | |
8314 | } | |
8315 | } | |
8316 | if (loc != base) | |
8317 | { | |
8318 | /* Don't just swap *base and *loc as that changes the order | |
8319 | of the original base[0] and base[1] if they happen to | |
8320 | have the same r_offset. */ | |
bca6d0e3 AM |
8321 | bfd_byte onebuf[sizeof (Elf64_External_Rela)]; |
8322 | memcpy (onebuf, loc, elt_size); | |
0e287786 | 8323 | memmove (base + elt_size, base, loc - base); |
bca6d0e3 | 8324 | memcpy (base, onebuf, elt_size); |
0e287786 AM |
8325 | } |
8326 | ||
b29b8669 | 8327 | for (p = base + elt_size; (p += elt_size) < end; ) |
0e287786 AM |
8328 | { |
8329 | /* base to p is sorted, *p is next to insert. */ | |
8330 | r_off = (*ext_r_off) (p); | |
8331 | /* Search the sorted region for location to insert. */ | |
8332 | loc = p - elt_size; | |
8333 | while (r_off < (*ext_r_off) (loc)) | |
8334 | loc -= elt_size; | |
8335 | loc += elt_size; | |
8336 | if (loc != p) | |
8337 | { | |
bca6d0e3 AM |
8338 | /* Chances are there is a run of relocs to insert here, |
8339 | from one of more input files. Files are not always | |
8340 | linked in order due to the way elf_link_input_bfd is | |
8341 | called. See pr17666. */ | |
8342 | size_t sortlen = p - loc; | |
8343 | bfd_vma r_off2 = (*ext_r_off) (loc); | |
8344 | size_t runlen = elt_size; | |
8345 | size_t buf_size = 96 * 1024; | |
8346 | while (p + runlen < end | |
8347 | && (sortlen <= buf_size | |
8348 | || runlen + elt_size <= buf_size) | |
8349 | && r_off2 > (*ext_r_off) (p + runlen)) | |
8350 | runlen += elt_size; | |
8351 | if (buf == NULL) | |
8352 | { | |
8353 | buf = bfd_malloc (buf_size); | |
8354 | if (buf == NULL) | |
8355 | return FALSE; | |
8356 | } | |
8357 | if (runlen < sortlen) | |
8358 | { | |
8359 | memcpy (buf, p, runlen); | |
8360 | memmove (loc + runlen, loc, sortlen); | |
8361 | memcpy (loc, buf, runlen); | |
8362 | } | |
8363 | else | |
8364 | { | |
8365 | memcpy (buf, loc, sortlen); | |
8366 | memmove (loc, p, runlen); | |
8367 | memcpy (loc + runlen, buf, sortlen); | |
8368 | } | |
b29b8669 | 8369 | p += runlen - elt_size; |
0e287786 AM |
8370 | } |
8371 | } | |
8372 | /* Hashes are no longer valid. */ | |
28dbcedc AM |
8373 | free (reldata->hashes); |
8374 | reldata->hashes = NULL; | |
bca6d0e3 | 8375 | free (buf); |
53df40a4 | 8376 | } |
bca6d0e3 | 8377 | return TRUE; |
c152c796 AM |
8378 | } |
8379 | ||
8380 | struct elf_link_sort_rela | |
8381 | { | |
8382 | union { | |
8383 | bfd_vma offset; | |
8384 | bfd_vma sym_mask; | |
8385 | } u; | |
8386 | enum elf_reloc_type_class type; | |
8387 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
8388 | Elf_Internal_Rela rela[1]; | |
8389 | }; | |
8390 | ||
8391 | static int | |
8392 | elf_link_sort_cmp1 (const void *A, const void *B) | |
8393 | { | |
a50b1753 NC |
8394 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8395 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
8396 | int relativea, relativeb; |
8397 | ||
8398 | relativea = a->type == reloc_class_relative; | |
8399 | relativeb = b->type == reloc_class_relative; | |
8400 | ||
8401 | if (relativea < relativeb) | |
8402 | return 1; | |
8403 | if (relativea > relativeb) | |
8404 | return -1; | |
8405 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
8406 | return -1; | |
8407 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
8408 | return 1; | |
8409 | if (a->rela->r_offset < b->rela->r_offset) | |
8410 | return -1; | |
8411 | if (a->rela->r_offset > b->rela->r_offset) | |
8412 | return 1; | |
8413 | return 0; | |
8414 | } | |
8415 | ||
8416 | static int | |
8417 | elf_link_sort_cmp2 (const void *A, const void *B) | |
8418 | { | |
a50b1753 NC |
8419 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8420 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 8421 | |
7e612e98 | 8422 | if (a->type < b->type) |
c152c796 | 8423 | return -1; |
7e612e98 | 8424 | if (a->type > b->type) |
c152c796 | 8425 | return 1; |
7e612e98 | 8426 | if (a->u.offset < b->u.offset) |
c152c796 | 8427 | return -1; |
7e612e98 | 8428 | if (a->u.offset > b->u.offset) |
c152c796 AM |
8429 | return 1; |
8430 | if (a->rela->r_offset < b->rela->r_offset) | |
8431 | return -1; | |
8432 | if (a->rela->r_offset > b->rela->r_offset) | |
8433 | return 1; | |
8434 | return 0; | |
8435 | } | |
8436 | ||
8437 | static size_t | |
8438 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
8439 | { | |
3410fea8 | 8440 | asection *dynamic_relocs; |
fc66a176 L |
8441 | asection *rela_dyn; |
8442 | asection *rel_dyn; | |
c152c796 AM |
8443 | bfd_size_type count, size; |
8444 | size_t i, ret, sort_elt, ext_size; | |
8445 | bfd_byte *sort, *s_non_relative, *p; | |
8446 | struct elf_link_sort_rela *sq; | |
8447 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8448 | int i2e = bed->s->int_rels_per_ext_rel; | |
8449 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8450 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8451 | struct bfd_link_order *lo; | |
8452 | bfd_vma r_sym_mask; | |
3410fea8 | 8453 | bfd_boolean use_rela; |
c152c796 | 8454 | |
3410fea8 NC |
8455 | /* Find a dynamic reloc section. */ |
8456 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
8457 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
8458 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
8459 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 8460 | { |
3410fea8 NC |
8461 | bfd_boolean use_rela_initialised = FALSE; |
8462 | ||
8463 | /* This is just here to stop gcc from complaining. | |
8464 | It's initialization checking code is not perfect. */ | |
8465 | use_rela = TRUE; | |
8466 | ||
8467 | /* Both sections are present. Examine the sizes | |
8468 | of the indirect sections to help us choose. */ | |
8469 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8470 | if (lo->type == bfd_indirect_link_order) | |
8471 | { | |
8472 | asection *o = lo->u.indirect.section; | |
8473 | ||
8474 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8475 | { | |
8476 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8477 | /* Section size is divisible by both rel and rela sizes. | |
8478 | It is of no help to us. */ | |
8479 | ; | |
8480 | else | |
8481 | { | |
8482 | /* Section size is only divisible by rela. */ | |
8483 | if (use_rela_initialised && (use_rela == FALSE)) | |
8484 | { | |
8485 | _bfd_error_handler | |
8486 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8487 | bfd_set_error (bfd_error_invalid_operation); | |
8488 | return 0; | |
8489 | } | |
8490 | else | |
8491 | { | |
8492 | use_rela = TRUE; | |
8493 | use_rela_initialised = TRUE; | |
8494 | } | |
8495 | } | |
8496 | } | |
8497 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8498 | { | |
8499 | /* Section size is only divisible by rel. */ | |
8500 | if (use_rela_initialised && (use_rela == TRUE)) | |
8501 | { | |
8502 | _bfd_error_handler | |
8503 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8504 | bfd_set_error (bfd_error_invalid_operation); | |
8505 | return 0; | |
8506 | } | |
8507 | else | |
8508 | { | |
8509 | use_rela = FALSE; | |
8510 | use_rela_initialised = TRUE; | |
8511 | } | |
8512 | } | |
8513 | else | |
8514 | { | |
8515 | /* The section size is not divisible by either - something is wrong. */ | |
8516 | _bfd_error_handler | |
8517 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8518 | bfd_set_error (bfd_error_invalid_operation); | |
8519 | return 0; | |
8520 | } | |
8521 | } | |
8522 | ||
8523 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8524 | if (lo->type == bfd_indirect_link_order) | |
8525 | { | |
8526 | asection *o = lo->u.indirect.section; | |
8527 | ||
8528 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8529 | { | |
8530 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8531 | /* Section size is divisible by both rel and rela sizes. | |
8532 | It is of no help to us. */ | |
8533 | ; | |
8534 | else | |
8535 | { | |
8536 | /* Section size is only divisible by rela. */ | |
8537 | if (use_rela_initialised && (use_rela == FALSE)) | |
8538 | { | |
8539 | _bfd_error_handler | |
8540 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8541 | bfd_set_error (bfd_error_invalid_operation); | |
8542 | return 0; | |
8543 | } | |
8544 | else | |
8545 | { | |
8546 | use_rela = TRUE; | |
8547 | use_rela_initialised = TRUE; | |
8548 | } | |
8549 | } | |
8550 | } | |
8551 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8552 | { | |
8553 | /* Section size is only divisible by rel. */ | |
8554 | if (use_rela_initialised && (use_rela == TRUE)) | |
8555 | { | |
8556 | _bfd_error_handler | |
8557 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8558 | bfd_set_error (bfd_error_invalid_operation); | |
8559 | return 0; | |
8560 | } | |
8561 | else | |
8562 | { | |
8563 | use_rela = FALSE; | |
8564 | use_rela_initialised = TRUE; | |
8565 | } | |
8566 | } | |
8567 | else | |
8568 | { | |
8569 | /* The section size is not divisible by either - something is wrong. */ | |
8570 | _bfd_error_handler | |
8571 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8572 | bfd_set_error (bfd_error_invalid_operation); | |
8573 | return 0; | |
8574 | } | |
8575 | } | |
8576 | ||
8577 | if (! use_rela_initialised) | |
8578 | /* Make a guess. */ | |
8579 | use_rela = TRUE; | |
c152c796 | 8580 | } |
fc66a176 L |
8581 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
8582 | use_rela = TRUE; | |
8583 | else if (rel_dyn != NULL && rel_dyn->size > 0) | |
3410fea8 | 8584 | use_rela = FALSE; |
c152c796 | 8585 | else |
fc66a176 | 8586 | return 0; |
3410fea8 NC |
8587 | |
8588 | if (use_rela) | |
c152c796 | 8589 | { |
3410fea8 | 8590 | dynamic_relocs = rela_dyn; |
c152c796 AM |
8591 | ext_size = bed->s->sizeof_rela; |
8592 | swap_in = bed->s->swap_reloca_in; | |
8593 | swap_out = bed->s->swap_reloca_out; | |
8594 | } | |
3410fea8 NC |
8595 | else |
8596 | { | |
8597 | dynamic_relocs = rel_dyn; | |
8598 | ext_size = bed->s->sizeof_rel; | |
8599 | swap_in = bed->s->swap_reloc_in; | |
8600 | swap_out = bed->s->swap_reloc_out; | |
8601 | } | |
c152c796 AM |
8602 | |
8603 | size = 0; | |
3410fea8 | 8604 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 8605 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 8606 | size += lo->u.indirect.section->size; |
c152c796 | 8607 | |
3410fea8 | 8608 | if (size != dynamic_relocs->size) |
c152c796 AM |
8609 | return 0; |
8610 | ||
8611 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
8612 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
8613 | |
8614 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
8615 | if (count == 0) |
8616 | return 0; | |
a50b1753 | 8617 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 8618 | |
c152c796 AM |
8619 | if (sort == NULL) |
8620 | { | |
8621 | (*info->callbacks->warning) | |
8622 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); | |
8623 | return 0; | |
8624 | } | |
8625 | ||
8626 | if (bed->s->arch_size == 32) | |
8627 | r_sym_mask = ~(bfd_vma) 0xff; | |
8628 | else | |
8629 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
8630 | ||
3410fea8 | 8631 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8632 | if (lo->type == bfd_indirect_link_order) |
8633 | { | |
8634 | bfd_byte *erel, *erelend; | |
8635 | asection *o = lo->u.indirect.section; | |
8636 | ||
1da212d6 AM |
8637 | if (o->contents == NULL && o->size != 0) |
8638 | { | |
8639 | /* This is a reloc section that is being handled as a normal | |
8640 | section. See bfd_section_from_shdr. We can't combine | |
8641 | relocs in this case. */ | |
8642 | free (sort); | |
8643 | return 0; | |
8644 | } | |
c152c796 | 8645 | erel = o->contents; |
eea6121a | 8646 | erelend = o->contents + o->size; |
5dabe785 | 8647 | /* FIXME: octets_per_byte. */ |
c152c796 | 8648 | p = sort + o->output_offset / ext_size * sort_elt; |
3410fea8 | 8649 | |
c152c796 AM |
8650 | while (erel < erelend) |
8651 | { | |
8652 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 8653 | |
c152c796 | 8654 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 8655 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
8656 | s->u.sym_mask = r_sym_mask; |
8657 | p += sort_elt; | |
8658 | erel += ext_size; | |
8659 | } | |
8660 | } | |
8661 | ||
8662 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
8663 | ||
8664 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
8665 | { | |
8666 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8667 | if (s->type != reloc_class_relative) | |
8668 | break; | |
8669 | } | |
8670 | ret = i; | |
8671 | s_non_relative = p; | |
8672 | ||
8673 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
8674 | for (; i < count; i++, p += sort_elt) | |
8675 | { | |
8676 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
8677 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
8678 | sq = sp; | |
8679 | sp->u.offset = sq->rela->r_offset; | |
8680 | } | |
8681 | ||
8682 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
8683 | ||
3410fea8 | 8684 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8685 | if (lo->type == bfd_indirect_link_order) |
8686 | { | |
8687 | bfd_byte *erel, *erelend; | |
8688 | asection *o = lo->u.indirect.section; | |
8689 | ||
8690 | erel = o->contents; | |
eea6121a | 8691 | erelend = o->contents + o->size; |
5dabe785 | 8692 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
8693 | p = sort + o->output_offset / ext_size * sort_elt; |
8694 | while (erel < erelend) | |
8695 | { | |
8696 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8697 | (*swap_out) (abfd, s->rela, erel); | |
8698 | p += sort_elt; | |
8699 | erel += ext_size; | |
8700 | } | |
8701 | } | |
8702 | ||
8703 | free (sort); | |
3410fea8 | 8704 | *psec = dynamic_relocs; |
c152c796 AM |
8705 | return ret; |
8706 | } | |
8707 | ||
ef10c3ac | 8708 | /* Add a symbol to the output symbol string table. */ |
c152c796 | 8709 | |
6e0b88f1 | 8710 | static int |
ef10c3ac L |
8711 | elf_link_output_symstrtab (struct elf_final_link_info *flinfo, |
8712 | const char *name, | |
8713 | Elf_Internal_Sym *elfsym, | |
8714 | asection *input_sec, | |
8715 | struct elf_link_hash_entry *h) | |
c152c796 | 8716 | { |
6e0b88f1 | 8717 | int (*output_symbol_hook) |
c152c796 AM |
8718 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
8719 | struct elf_link_hash_entry *); | |
ef10c3ac | 8720 | struct elf_link_hash_table *hash_table; |
c152c796 | 8721 | const struct elf_backend_data *bed; |
ef10c3ac | 8722 | bfd_size_type strtabsize; |
c152c796 | 8723 | |
8539e4e8 AM |
8724 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); |
8725 | ||
8b127cbc | 8726 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
8727 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
8728 | if (output_symbol_hook != NULL) | |
8729 | { | |
8b127cbc | 8730 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
8731 | if (ret != 1) |
8732 | return ret; | |
c152c796 AM |
8733 | } |
8734 | ||
ef10c3ac L |
8735 | if (name == NULL |
8736 | || *name == '\0' | |
8737 | || (input_sec->flags & SEC_EXCLUDE)) | |
8738 | elfsym->st_name = (unsigned long) -1; | |
c152c796 AM |
8739 | else |
8740 | { | |
ef10c3ac L |
8741 | /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize |
8742 | to get the final offset for st_name. */ | |
8743 | elfsym->st_name | |
8744 | = (unsigned long) _bfd_elf_strtab_add (flinfo->symstrtab, | |
8745 | name, FALSE); | |
c152c796 | 8746 | if (elfsym->st_name == (unsigned long) -1) |
6e0b88f1 | 8747 | return 0; |
c152c796 AM |
8748 | } |
8749 | ||
ef10c3ac L |
8750 | hash_table = elf_hash_table (flinfo->info); |
8751 | strtabsize = hash_table->strtabsize; | |
8752 | if (strtabsize <= hash_table->strtabcount) | |
c152c796 | 8753 | { |
ef10c3ac L |
8754 | strtabsize += strtabsize; |
8755 | hash_table->strtabsize = strtabsize; | |
8756 | strtabsize *= sizeof (*hash_table->strtab); | |
8757 | hash_table->strtab | |
8758 | = (struct elf_sym_strtab *) bfd_realloc (hash_table->strtab, | |
8759 | strtabsize); | |
8760 | if (hash_table->strtab == NULL) | |
6e0b88f1 | 8761 | return 0; |
c152c796 | 8762 | } |
ef10c3ac L |
8763 | hash_table->strtab[hash_table->strtabcount].sym = *elfsym; |
8764 | hash_table->strtab[hash_table->strtabcount].dest_index | |
8765 | = hash_table->strtabcount; | |
8766 | hash_table->strtab[hash_table->strtabcount].destshndx_index | |
8767 | = flinfo->symshndxbuf ? bfd_get_symcount (flinfo->output_bfd) : 0; | |
8768 | ||
8769 | bfd_get_symcount (flinfo->output_bfd) += 1; | |
8770 | hash_table->strtabcount += 1; | |
8771 | ||
8772 | return 1; | |
8773 | } | |
8774 | ||
8775 | /* Swap symbols out to the symbol table and flush the output symbols to | |
8776 | the file. */ | |
8777 | ||
8778 | static bfd_boolean | |
8779 | elf_link_swap_symbols_out (struct elf_final_link_info *flinfo) | |
8780 | { | |
8781 | struct elf_link_hash_table *hash_table = elf_hash_table (flinfo->info); | |
8782 | bfd_size_type amt, i; | |
8783 | const struct elf_backend_data *bed; | |
8784 | bfd_byte *symbuf; | |
8785 | Elf_Internal_Shdr *hdr; | |
8786 | file_ptr pos; | |
8787 | bfd_boolean ret; | |
8788 | ||
8789 | if (!hash_table->strtabcount) | |
8790 | return TRUE; | |
8791 | ||
8792 | BFD_ASSERT (elf_onesymtab (flinfo->output_bfd)); | |
8793 | ||
8794 | bed = get_elf_backend_data (flinfo->output_bfd); | |
c152c796 | 8795 | |
ef10c3ac L |
8796 | amt = bed->s->sizeof_sym * hash_table->strtabcount; |
8797 | symbuf = (bfd_byte *) bfd_malloc (amt); | |
8798 | if (symbuf == NULL) | |
8799 | return FALSE; | |
1b786873 | 8800 | |
ef10c3ac | 8801 | if (flinfo->symshndxbuf) |
c152c796 | 8802 | { |
ef10c3ac L |
8803 | amt = (sizeof (Elf_External_Sym_Shndx) |
8804 | * (bfd_get_symcount (flinfo->output_bfd))); | |
8805 | flinfo->symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); | |
8806 | if (flinfo->symshndxbuf == NULL) | |
c152c796 | 8807 | { |
ef10c3ac L |
8808 | free (symbuf); |
8809 | return FALSE; | |
c152c796 | 8810 | } |
c152c796 AM |
8811 | } |
8812 | ||
ef10c3ac L |
8813 | for (i = 0; i < hash_table->strtabcount; i++) |
8814 | { | |
8815 | struct elf_sym_strtab *elfsym = &hash_table->strtab[i]; | |
8816 | if (elfsym->sym.st_name == (unsigned long) -1) | |
8817 | elfsym->sym.st_name = 0; | |
8818 | else | |
8819 | elfsym->sym.st_name | |
8820 | = (unsigned long) _bfd_elf_strtab_offset (flinfo->symstrtab, | |
8821 | elfsym->sym.st_name); | |
8822 | bed->s->swap_symbol_out (flinfo->output_bfd, &elfsym->sym, | |
8823 | ((bfd_byte *) symbuf | |
8824 | + (elfsym->dest_index | |
8825 | * bed->s->sizeof_sym)), | |
8826 | (flinfo->symshndxbuf | |
8827 | + elfsym->destshndx_index)); | |
8828 | } | |
8829 | ||
8830 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; | |
8831 | pos = hdr->sh_offset + hdr->sh_size; | |
8832 | amt = hash_table->strtabcount * bed->s->sizeof_sym; | |
8833 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) == 0 | |
8834 | && bfd_bwrite (symbuf, amt, flinfo->output_bfd) == amt) | |
8835 | { | |
8836 | hdr->sh_size += amt; | |
8837 | ret = TRUE; | |
8838 | } | |
8839 | else | |
8840 | ret = FALSE; | |
c152c796 | 8841 | |
ef10c3ac L |
8842 | free (symbuf); |
8843 | ||
8844 | free (hash_table->strtab); | |
8845 | hash_table->strtab = NULL; | |
8846 | ||
8847 | return ret; | |
c152c796 AM |
8848 | } |
8849 | ||
c0d5a53d L |
8850 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
8851 | ||
8852 | static bfd_boolean | |
8853 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) | |
8854 | { | |
4fbb74a6 AM |
8855 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
8856 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
8857 | { |
8858 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 8859 | beyond 64k. */ |
c0d5a53d L |
8860 | (*_bfd_error_handler) |
8861 | (_("%B: Too many sections: %d (>= %d)"), | |
4fbb74a6 | 8862 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d L |
8863 | bfd_set_error (bfd_error_nonrepresentable_section); |
8864 | return FALSE; | |
8865 | } | |
8866 | return TRUE; | |
8867 | } | |
8868 | ||
c152c796 AM |
8869 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
8870 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
8871 | versioned symbol that would normally require an explicit version. | |
8872 | We also handle the case that a DSO references a hidden symbol | |
8873 | which may be satisfied by a versioned symbol in another DSO. */ | |
8874 | ||
8875 | static bfd_boolean | |
8876 | elf_link_check_versioned_symbol (struct bfd_link_info *info, | |
8877 | const struct elf_backend_data *bed, | |
8878 | struct elf_link_hash_entry *h) | |
8879 | { | |
8880 | bfd *abfd; | |
8881 | struct elf_link_loaded_list *loaded; | |
8882 | ||
8883 | if (!is_elf_hash_table (info->hash)) | |
8884 | return FALSE; | |
8885 | ||
90c984fc L |
8886 | /* Check indirect symbol. */ |
8887 | while (h->root.type == bfd_link_hash_indirect) | |
8888 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8889 | ||
c152c796 AM |
8890 | switch (h->root.type) |
8891 | { | |
8892 | default: | |
8893 | abfd = NULL; | |
8894 | break; | |
8895 | ||
8896 | case bfd_link_hash_undefined: | |
8897 | case bfd_link_hash_undefweak: | |
8898 | abfd = h->root.u.undef.abfd; | |
8899 | if ((abfd->flags & DYNAMIC) == 0 | |
e56f61be | 8900 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
c152c796 AM |
8901 | return FALSE; |
8902 | break; | |
8903 | ||
8904 | case bfd_link_hash_defined: | |
8905 | case bfd_link_hash_defweak: | |
8906 | abfd = h->root.u.def.section->owner; | |
8907 | break; | |
8908 | ||
8909 | case bfd_link_hash_common: | |
8910 | abfd = h->root.u.c.p->section->owner; | |
8911 | break; | |
8912 | } | |
8913 | BFD_ASSERT (abfd != NULL); | |
8914 | ||
8915 | for (loaded = elf_hash_table (info)->loaded; | |
8916 | loaded != NULL; | |
8917 | loaded = loaded->next) | |
8918 | { | |
8919 | bfd *input; | |
8920 | Elf_Internal_Shdr *hdr; | |
8921 | bfd_size_type symcount; | |
8922 | bfd_size_type extsymcount; | |
8923 | bfd_size_type extsymoff; | |
8924 | Elf_Internal_Shdr *versymhdr; | |
8925 | Elf_Internal_Sym *isym; | |
8926 | Elf_Internal_Sym *isymend; | |
8927 | Elf_Internal_Sym *isymbuf; | |
8928 | Elf_External_Versym *ever; | |
8929 | Elf_External_Versym *extversym; | |
8930 | ||
8931 | input = loaded->abfd; | |
8932 | ||
8933 | /* We check each DSO for a possible hidden versioned definition. */ | |
8934 | if (input == abfd | |
8935 | || (input->flags & DYNAMIC) == 0 | |
8936 | || elf_dynversym (input) == 0) | |
8937 | continue; | |
8938 | ||
8939 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
8940 | ||
8941 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
8942 | if (elf_bad_symtab (input)) | |
8943 | { | |
8944 | extsymcount = symcount; | |
8945 | extsymoff = 0; | |
8946 | } | |
8947 | else | |
8948 | { | |
8949 | extsymcount = symcount - hdr->sh_info; | |
8950 | extsymoff = hdr->sh_info; | |
8951 | } | |
8952 | ||
8953 | if (extsymcount == 0) | |
8954 | continue; | |
8955 | ||
8956 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
8957 | NULL, NULL, NULL); | |
8958 | if (isymbuf == NULL) | |
8959 | return FALSE; | |
8960 | ||
8961 | /* Read in any version definitions. */ | |
8962 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
a50b1753 | 8963 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
c152c796 AM |
8964 | if (extversym == NULL) |
8965 | goto error_ret; | |
8966 | ||
8967 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
8968 | || (bfd_bread (extversym, versymhdr->sh_size, input) | |
8969 | != versymhdr->sh_size)) | |
8970 | { | |
8971 | free (extversym); | |
8972 | error_ret: | |
8973 | free (isymbuf); | |
8974 | return FALSE; | |
8975 | } | |
8976 | ||
8977 | ever = extversym + extsymoff; | |
8978 | isymend = isymbuf + extsymcount; | |
8979 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
8980 | { | |
8981 | const char *name; | |
8982 | Elf_Internal_Versym iver; | |
8983 | unsigned short version_index; | |
8984 | ||
8985 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
8986 | || isym->st_shndx == SHN_UNDEF) | |
8987 | continue; | |
8988 | ||
8989 | name = bfd_elf_string_from_elf_section (input, | |
8990 | hdr->sh_link, | |
8991 | isym->st_name); | |
8992 | if (strcmp (name, h->root.root.string) != 0) | |
8993 | continue; | |
8994 | ||
8995 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
8996 | ||
d023c380 L |
8997 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
8998 | && !(h->def_regular | |
8999 | && h->forced_local)) | |
c152c796 AM |
9000 | { |
9001 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
9002 | have provided a definition for the undefined sym unless |
9003 | it is defined in a non-shared object and forced local. | |
9004 | */ | |
c152c796 AM |
9005 | abort (); |
9006 | } | |
9007 | ||
9008 | version_index = iver.vs_vers & VERSYM_VERSION; | |
9009 | if (version_index == 1 || version_index == 2) | |
9010 | { | |
9011 | /* This is the base or first version. We can use it. */ | |
9012 | free (extversym); | |
9013 | free (isymbuf); | |
9014 | return TRUE; | |
9015 | } | |
9016 | } | |
9017 | ||
9018 | free (extversym); | |
9019 | free (isymbuf); | |
9020 | } | |
9021 | ||
9022 | return FALSE; | |
9023 | } | |
9024 | ||
9025 | /* Add an external symbol to the symbol table. This is called from | |
9026 | the hash table traversal routine. When generating a shared object, | |
9027 | we go through the symbol table twice. The first time we output | |
9028 | anything that might have been forced to local scope in a version | |
9029 | script. The second time we output the symbols that are still | |
9030 | global symbols. */ | |
9031 | ||
9032 | static bfd_boolean | |
7686d77d | 9033 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 9034 | { |
7686d77d | 9035 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 9036 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 9037 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
c152c796 AM |
9038 | bfd_boolean strip; |
9039 | Elf_Internal_Sym sym; | |
9040 | asection *input_sec; | |
9041 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
9042 | long indx; |
9043 | int ret; | |
6e33951e L |
9044 | /* A symbol is bound locally if it is forced local or it is locally |
9045 | defined, hidden versioned, not referenced by shared library and | |
9046 | not exported when linking executable. */ | |
9047 | bfd_boolean local_bind = (h->forced_local | |
0e1862bb | 9048 | || (bfd_link_executable (flinfo->info) |
6e33951e L |
9049 | && !flinfo->info->export_dynamic |
9050 | && !h->dynamic | |
9051 | && !h->ref_dynamic | |
9052 | && h->def_regular | |
422f1182 | 9053 | && h->versioned == versioned_hidden)); |
c152c796 AM |
9054 | |
9055 | if (h->root.type == bfd_link_hash_warning) | |
9056 | { | |
9057 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9058 | if (h->root.type == bfd_link_hash_new) | |
9059 | return TRUE; | |
9060 | } | |
9061 | ||
9062 | /* Decide whether to output this symbol in this pass. */ | |
9063 | if (eoinfo->localsyms) | |
9064 | { | |
6e33951e | 9065 | if (!local_bind) |
c152c796 AM |
9066 | return TRUE; |
9067 | } | |
9068 | else | |
9069 | { | |
6e33951e | 9070 | if (local_bind) |
c152c796 AM |
9071 | return TRUE; |
9072 | } | |
9073 | ||
8b127cbc | 9074 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 9075 | |
12ac1cf5 | 9076 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 9077 | { |
12ac1cf5 NC |
9078 | /* If we have an undefined symbol reference here then it must have |
9079 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
9080 | references in regular files have already been handled unless |
9081 | they are in unreferenced sections which are removed by garbage | |
9082 | collection). */ | |
12ac1cf5 NC |
9083 | bfd_boolean ignore_undef = FALSE; |
9084 | ||
9085 | /* Some symbols may be special in that the fact that they're | |
9086 | undefined can be safely ignored - let backend determine that. */ | |
9087 | if (bed->elf_backend_ignore_undef_symbol) | |
9088 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
9089 | ||
9090 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 9091 | if (!ignore_undef |
12ac1cf5 | 9092 | && h->ref_dynamic |
8b127cbc AM |
9093 | && (!h->ref_regular || flinfo->info->gc_sections) |
9094 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
9095 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
9096 | { | |
9097 | if (!(flinfo->info->callbacks->undefined_symbol | |
9098 | (flinfo->info, h->root.root.string, | |
9099 | h->ref_regular ? NULL : h->root.u.undef.abfd, | |
9100 | NULL, 0, | |
9101 | (flinfo->info->unresolved_syms_in_shared_libs | |
9102 | == RM_GENERATE_ERROR)))) | |
12ac1cf5 | 9103 | { |
17d078c5 | 9104 | bfd_set_error (bfd_error_bad_value); |
12ac1cf5 NC |
9105 | eoinfo->failed = TRUE; |
9106 | return FALSE; | |
9107 | } | |
c152c796 AM |
9108 | } |
9109 | } | |
9110 | ||
9111 | /* We should also warn if a forced local symbol is referenced from | |
9112 | shared libraries. */ | |
0e1862bb | 9113 | if (bfd_link_executable (flinfo->info) |
f5385ebf AM |
9114 | && h->forced_local |
9115 | && h->ref_dynamic | |
371a5866 | 9116 | && h->def_regular |
f5385ebf | 9117 | && !h->dynamic_def |
ee659f1f | 9118 | && h->ref_dynamic_nonweak |
8b127cbc | 9119 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 9120 | { |
17d078c5 AM |
9121 | bfd *def_bfd; |
9122 | const char *msg; | |
90c984fc L |
9123 | struct elf_link_hash_entry *hi = h; |
9124 | ||
9125 | /* Check indirect symbol. */ | |
9126 | while (hi->root.type == bfd_link_hash_indirect) | |
9127 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
9128 | |
9129 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
9130 | msg = _("%B: internal symbol `%s' in %B is referenced by DSO"); | |
9131 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
9132 | msg = _("%B: hidden symbol `%s' in %B is referenced by DSO"); | |
9133 | else | |
9134 | msg = _("%B: local symbol `%s' in %B is referenced by DSO"); | |
8b127cbc | 9135 | def_bfd = flinfo->output_bfd; |
90c984fc L |
9136 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
9137 | def_bfd = hi->root.u.def.section->owner; | |
8b127cbc | 9138 | (*_bfd_error_handler) (msg, flinfo->output_bfd, def_bfd, |
17d078c5 AM |
9139 | h->root.root.string); |
9140 | bfd_set_error (bfd_error_bad_value); | |
c152c796 AM |
9141 | eoinfo->failed = TRUE; |
9142 | return FALSE; | |
9143 | } | |
9144 | ||
9145 | /* We don't want to output symbols that have never been mentioned by | |
9146 | a regular file, or that we have been told to strip. However, if | |
9147 | h->indx is set to -2, the symbol is used by a reloc and we must | |
9148 | output it. */ | |
d983c8c5 | 9149 | strip = FALSE; |
c152c796 | 9150 | if (h->indx == -2) |
d983c8c5 | 9151 | ; |
f5385ebf | 9152 | else if ((h->def_dynamic |
77cfaee6 AM |
9153 | || h->ref_dynamic |
9154 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
9155 | && !h->def_regular |
9156 | && !h->ref_regular) | |
c152c796 | 9157 | strip = TRUE; |
8b127cbc | 9158 | else if (flinfo->info->strip == strip_all) |
c152c796 | 9159 | strip = TRUE; |
8b127cbc AM |
9160 | else if (flinfo->info->strip == strip_some |
9161 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
c152c796 AM |
9162 | h->root.root.string, FALSE, FALSE) == NULL) |
9163 | strip = TRUE; | |
d56d55e7 AM |
9164 | else if ((h->root.type == bfd_link_hash_defined |
9165 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 9166 | && ((flinfo->info->strip_discarded |
dbaa2011 | 9167 | && discarded_section (h->root.u.def.section)) |
ca4be51c AM |
9168 | || ((h->root.u.def.section->flags & SEC_LINKER_CREATED) == 0 |
9169 | && h->root.u.def.section->owner != NULL | |
d56d55e7 | 9170 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) |
c152c796 | 9171 | strip = TRUE; |
9e2278f5 AM |
9172 | else if ((h->root.type == bfd_link_hash_undefined |
9173 | || h->root.type == bfd_link_hash_undefweak) | |
9174 | && h->root.u.undef.abfd != NULL | |
9175 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
9176 | strip = TRUE; | |
c152c796 AM |
9177 | |
9178 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
d983c8c5 AM |
9179 | nothing else to do. However, if it is a forced local symbol or |
9180 | an ifunc symbol we need to give the backend finish_dynamic_symbol | |
9181 | function a chance to make it dynamic. */ | |
c152c796 AM |
9182 | if (strip |
9183 | && h->dynindx == -1 | |
57ca8ac7 | 9184 | && h->type != STT_GNU_IFUNC |
f5385ebf | 9185 | && !h->forced_local) |
c152c796 AM |
9186 | return TRUE; |
9187 | ||
9188 | sym.st_value = 0; | |
9189 | sym.st_size = h->size; | |
9190 | sym.st_other = h->other; | |
6e33951e | 9191 | if (local_bind) |
935bd1e0 L |
9192 | { |
9193 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
9194 | /* Turn off visibility on local symbol. */ | |
9195 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
9196 | } | |
02acbe22 L |
9197 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ |
9198 | else if (h->unique_global && h->def_regular) | |
3e7a7d11 | 9199 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, h->type); |
c152c796 AM |
9200 | else if (h->root.type == bfd_link_hash_undefweak |
9201 | || h->root.type == bfd_link_hash_defweak) | |
9202 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
9203 | else | |
9204 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
35fc36a8 | 9205 | sym.st_target_internal = h->target_internal; |
c152c796 AM |
9206 | |
9207 | switch (h->root.type) | |
9208 | { | |
9209 | default: | |
9210 | case bfd_link_hash_new: | |
9211 | case bfd_link_hash_warning: | |
9212 | abort (); | |
9213 | return FALSE; | |
9214 | ||
9215 | case bfd_link_hash_undefined: | |
9216 | case bfd_link_hash_undefweak: | |
9217 | input_sec = bfd_und_section_ptr; | |
9218 | sym.st_shndx = SHN_UNDEF; | |
9219 | break; | |
9220 | ||
9221 | case bfd_link_hash_defined: | |
9222 | case bfd_link_hash_defweak: | |
9223 | { | |
9224 | input_sec = h->root.u.def.section; | |
9225 | if (input_sec->output_section != NULL) | |
9226 | { | |
9227 | sym.st_shndx = | |
8b127cbc | 9228 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
9229 | input_sec->output_section); |
9230 | if (sym.st_shndx == SHN_BAD) | |
9231 | { | |
9232 | (*_bfd_error_handler) | |
d003868e | 9233 | (_("%B: could not find output section %A for input section %A"), |
8b127cbc | 9234 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 9235 | bfd_set_error (bfd_error_nonrepresentable_section); |
c152c796 AM |
9236 | eoinfo->failed = TRUE; |
9237 | return FALSE; | |
9238 | } | |
9239 | ||
9240 | /* ELF symbols in relocatable files are section relative, | |
9241 | but in nonrelocatable files they are virtual | |
9242 | addresses. */ | |
9243 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
0e1862bb | 9244 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
9245 | { |
9246 | sym.st_value += input_sec->output_section->vma; | |
9247 | if (h->type == STT_TLS) | |
9248 | { | |
8b127cbc | 9249 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
9250 | if (tls_sec != NULL) |
9251 | sym.st_value -= tls_sec->vma; | |
c152c796 AM |
9252 | } |
9253 | } | |
9254 | } | |
9255 | else | |
9256 | { | |
9257 | BFD_ASSERT (input_sec->owner == NULL | |
9258 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
9259 | sym.st_shndx = SHN_UNDEF; | |
9260 | input_sec = bfd_und_section_ptr; | |
9261 | } | |
9262 | } | |
9263 | break; | |
9264 | ||
9265 | case bfd_link_hash_common: | |
9266 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 9267 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
9268 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
9269 | break; | |
9270 | ||
9271 | case bfd_link_hash_indirect: | |
9272 | /* These symbols are created by symbol versioning. They point | |
9273 | to the decorated version of the name. For example, if the | |
9274 | symbol foo@@GNU_1.2 is the default, which should be used when | |
9275 | foo is used with no version, then we add an indirect symbol | |
9276 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
9277 | since the indirected symbol is already in the hash table. */ | |
9278 | return TRUE; | |
9279 | } | |
9280 | ||
9281 | /* Give the processor backend a chance to tweak the symbol value, | |
9282 | and also to finish up anything that needs to be done for this | |
9283 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 9284 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 9285 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 9286 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 9287 | && h->def_regular |
0e1862bb | 9288 | && !bfd_link_relocatable (flinfo->info)) |
3aa14d16 L |
9289 | || ((h->dynindx != -1 |
9290 | || h->forced_local) | |
0e1862bb | 9291 | && ((bfd_link_pic (flinfo->info) |
3aa14d16 L |
9292 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
9293 | || h->root.type != bfd_link_hash_undefweak)) | |
9294 | || !h->forced_local) | |
8b127cbc | 9295 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
9296 | { |
9297 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 9298 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 AM |
9299 | { |
9300 | eoinfo->failed = TRUE; | |
9301 | return FALSE; | |
9302 | } | |
9303 | } | |
9304 | ||
9305 | /* If we are marking the symbol as undefined, and there are no | |
9306 | non-weak references to this symbol from a regular object, then | |
9307 | mark the symbol as weak undefined; if there are non-weak | |
9308 | references, mark the symbol as strong. We can't do this earlier, | |
9309 | because it might not be marked as undefined until the | |
9310 | finish_dynamic_symbol routine gets through with it. */ | |
9311 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 9312 | && h->ref_regular |
c152c796 AM |
9313 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
9314 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
9315 | { | |
9316 | int bindtype; | |
2955ec4c L |
9317 | unsigned int type = ELF_ST_TYPE (sym.st_info); |
9318 | ||
9319 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
9320 | if (type == STT_GNU_IFUNC) | |
9321 | type = STT_FUNC; | |
c152c796 | 9322 | |
f5385ebf | 9323 | if (h->ref_regular_nonweak) |
c152c796 AM |
9324 | bindtype = STB_GLOBAL; |
9325 | else | |
9326 | bindtype = STB_WEAK; | |
2955ec4c | 9327 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
9328 | } |
9329 | ||
bda987c2 CD |
9330 | /* If this is a symbol defined in a dynamic library, don't use the |
9331 | symbol size from the dynamic library. Relinking an executable | |
9332 | against a new library may introduce gratuitous changes in the | |
9333 | executable's symbols if we keep the size. */ | |
9334 | if (sym.st_shndx == SHN_UNDEF | |
9335 | && !h->def_regular | |
9336 | && h->def_dynamic) | |
9337 | sym.st_size = 0; | |
9338 | ||
c152c796 AM |
9339 | /* If a non-weak symbol with non-default visibility is not defined |
9340 | locally, it is a fatal error. */ | |
0e1862bb | 9341 | if (!bfd_link_relocatable (flinfo->info) |
c152c796 AM |
9342 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
9343 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
9344 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 9345 | && !h->def_regular) |
c152c796 | 9346 | { |
17d078c5 AM |
9347 | const char *msg; |
9348 | ||
9349 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
9350 | msg = _("%B: protected symbol `%s' isn't defined"); | |
9351 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) | |
9352 | msg = _("%B: internal symbol `%s' isn't defined"); | |
9353 | else | |
9354 | msg = _("%B: hidden symbol `%s' isn't defined"); | |
8b127cbc | 9355 | (*_bfd_error_handler) (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 9356 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
9357 | eoinfo->failed = TRUE; |
9358 | return FALSE; | |
9359 | } | |
9360 | ||
9361 | /* If this symbol should be put in the .dynsym section, then put it | |
9362 | there now. We already know the symbol index. We also fill in | |
9363 | the entry in the .hash section. */ | |
cae1fbbb | 9364 | if (elf_hash_table (flinfo->info)->dynsym != NULL |
202e2356 | 9365 | && h->dynindx != -1 |
8b127cbc | 9366 | && elf_hash_table (flinfo->info)->dynamic_sections_created) |
c152c796 | 9367 | { |
c152c796 AM |
9368 | bfd_byte *esym; |
9369 | ||
90c984fc L |
9370 | /* Since there is no version information in the dynamic string, |
9371 | if there is no version info in symbol version section, we will | |
1659f720 | 9372 | have a run-time problem if not linking executable, referenced |
6e33951e L |
9373 | by shared library, not locally defined, or not bound locally. |
9374 | */ | |
1659f720 | 9375 | if (h->verinfo.verdef == NULL |
6e33951e | 9376 | && !local_bind |
0e1862bb | 9377 | && (!bfd_link_executable (flinfo->info) |
1659f720 L |
9378 | || h->ref_dynamic |
9379 | || !h->def_regular)) | |
90c984fc L |
9380 | { |
9381 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
9382 | ||
9383 | if (p && p [1] != '\0') | |
9384 | { | |
9385 | (*_bfd_error_handler) | |
9386 | (_("%B: No symbol version section for versioned symbol `%s'"), | |
9387 | flinfo->output_bfd, h->root.root.string); | |
9388 | eoinfo->failed = TRUE; | |
9389 | return FALSE; | |
9390 | } | |
9391 | } | |
9392 | ||
c152c796 | 9393 | sym.st_name = h->dynstr_index; |
cae1fbbb L |
9394 | esym = (elf_hash_table (flinfo->info)->dynsym->contents |
9395 | + h->dynindx * bed->s->sizeof_sym); | |
8b127cbc | 9396 | if (!check_dynsym (flinfo->output_bfd, &sym)) |
c0d5a53d L |
9397 | { |
9398 | eoinfo->failed = TRUE; | |
9399 | return FALSE; | |
9400 | } | |
8b127cbc | 9401 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 9402 | |
8b127cbc | 9403 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
9404 | { |
9405 | size_t hash_entry_size; | |
9406 | bfd_byte *bucketpos; | |
9407 | bfd_vma chain; | |
41198d0c L |
9408 | size_t bucketcount; |
9409 | size_t bucket; | |
9410 | ||
8b127cbc | 9411 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 9412 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
9413 | |
9414 | hash_entry_size | |
8b127cbc AM |
9415 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
9416 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 9417 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
9418 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
9419 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
9420 | bucketpos); | |
9421 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
9422 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
9423 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
9424 | } | |
c152c796 | 9425 | |
8b127cbc | 9426 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
9427 | { |
9428 | Elf_Internal_Versym iversym; | |
9429 | Elf_External_Versym *eversym; | |
9430 | ||
f5385ebf | 9431 | if (!h->def_regular) |
c152c796 | 9432 | { |
7b20f099 AM |
9433 | if (h->verinfo.verdef == NULL |
9434 | || (elf_dyn_lib_class (h->verinfo.verdef->vd_bfd) | |
9435 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | DYN_NO_NEEDED))) | |
c152c796 AM |
9436 | iversym.vs_vers = 0; |
9437 | else | |
9438 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
9439 | } | |
9440 | else | |
9441 | { | |
9442 | if (h->verinfo.vertree == NULL) | |
9443 | iversym.vs_vers = 1; | |
9444 | else | |
9445 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 9446 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 9447 | iversym.vs_vers++; |
c152c796 AM |
9448 | } |
9449 | ||
422f1182 | 9450 | /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is |
6e33951e | 9451 | defined locally. */ |
422f1182 | 9452 | if (h->versioned == versioned_hidden && h->def_regular) |
c152c796 AM |
9453 | iversym.vs_vers |= VERSYM_HIDDEN; |
9454 | ||
8b127cbc | 9455 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 9456 | eversym += h->dynindx; |
8b127cbc | 9457 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
9458 | } |
9459 | } | |
9460 | ||
d983c8c5 AM |
9461 | /* If the symbol is undefined, and we didn't output it to .dynsym, |
9462 | strip it from .symtab too. Obviously we can't do this for | |
9463 | relocatable output or when needed for --emit-relocs. */ | |
9464 | else if (input_sec == bfd_und_section_ptr | |
9465 | && h->indx != -2 | |
0e1862bb | 9466 | && !bfd_link_relocatable (flinfo->info)) |
d983c8c5 AM |
9467 | return TRUE; |
9468 | /* Also strip others that we couldn't earlier due to dynamic symbol | |
9469 | processing. */ | |
9470 | if (strip) | |
9471 | return TRUE; | |
9472 | if ((input_sec->flags & SEC_EXCLUDE) != 0) | |
c152c796 AM |
9473 | return TRUE; |
9474 | ||
2ec55de3 AM |
9475 | /* Output a FILE symbol so that following locals are not associated |
9476 | with the wrong input file. We need one for forced local symbols | |
9477 | if we've seen more than one FILE symbol or when we have exactly | |
9478 | one FILE symbol but global symbols are present in a file other | |
9479 | than the one with the FILE symbol. We also need one if linker | |
9480 | defined symbols are present. In practice these conditions are | |
9481 | always met, so just emit the FILE symbol unconditionally. */ | |
9482 | if (eoinfo->localsyms | |
9483 | && !eoinfo->file_sym_done | |
9484 | && eoinfo->flinfo->filesym_count != 0) | |
9485 | { | |
9486 | Elf_Internal_Sym fsym; | |
9487 | ||
9488 | memset (&fsym, 0, sizeof (fsym)); | |
9489 | fsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9490 | fsym.st_shndx = SHN_ABS; | |
ef10c3ac L |
9491 | if (!elf_link_output_symstrtab (eoinfo->flinfo, NULL, &fsym, |
9492 | bfd_und_section_ptr, NULL)) | |
2ec55de3 AM |
9493 | return FALSE; |
9494 | ||
9495 | eoinfo->file_sym_done = TRUE; | |
9496 | } | |
9497 | ||
8b127cbc | 9498 | indx = bfd_get_symcount (flinfo->output_bfd); |
ef10c3ac L |
9499 | ret = elf_link_output_symstrtab (flinfo, h->root.root.string, &sym, |
9500 | input_sec, h); | |
6e0b88f1 | 9501 | if (ret == 0) |
c152c796 AM |
9502 | { |
9503 | eoinfo->failed = TRUE; | |
9504 | return FALSE; | |
9505 | } | |
6e0b88f1 AM |
9506 | else if (ret == 1) |
9507 | h->indx = indx; | |
9508 | else if (h->indx == -2) | |
9509 | abort(); | |
c152c796 AM |
9510 | |
9511 | return TRUE; | |
9512 | } | |
9513 | ||
cdd3575c AM |
9514 | /* Return TRUE if special handling is done for relocs in SEC against |
9515 | symbols defined in discarded sections. */ | |
9516 | ||
c152c796 AM |
9517 | static bfd_boolean |
9518 | elf_section_ignore_discarded_relocs (asection *sec) | |
9519 | { | |
9520 | const struct elf_backend_data *bed; | |
9521 | ||
cdd3575c AM |
9522 | switch (sec->sec_info_type) |
9523 | { | |
dbaa2011 AM |
9524 | case SEC_INFO_TYPE_STABS: |
9525 | case SEC_INFO_TYPE_EH_FRAME: | |
2f0c68f2 | 9526 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
cdd3575c AM |
9527 | return TRUE; |
9528 | default: | |
9529 | break; | |
9530 | } | |
c152c796 AM |
9531 | |
9532 | bed = get_elf_backend_data (sec->owner); | |
9533 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
9534 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
9535 | return TRUE; | |
9536 | ||
9537 | return FALSE; | |
9538 | } | |
9539 | ||
9e66c942 AM |
9540 | /* Return a mask saying how ld should treat relocations in SEC against |
9541 | symbols defined in discarded sections. If this function returns | |
9542 | COMPLAIN set, ld will issue a warning message. If this function | |
9543 | returns PRETEND set, and the discarded section was link-once and the | |
9544 | same size as the kept link-once section, ld will pretend that the | |
9545 | symbol was actually defined in the kept section. Otherwise ld will | |
9546 | zero the reloc (at least that is the intent, but some cooperation by | |
9547 | the target dependent code is needed, particularly for REL targets). */ | |
9548 | ||
8a696751 AM |
9549 | unsigned int |
9550 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 9551 | { |
9e66c942 | 9552 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 9553 | return PRETEND; |
cdd3575c AM |
9554 | |
9555 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 9556 | return 0; |
cdd3575c AM |
9557 | |
9558 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 9559 | return 0; |
cdd3575c | 9560 | |
9e66c942 | 9561 | return COMPLAIN | PRETEND; |
cdd3575c AM |
9562 | } |
9563 | ||
3d7f7666 L |
9564 | /* Find a match between a section and a member of a section group. */ |
9565 | ||
9566 | static asection * | |
c0f00686 L |
9567 | match_group_member (asection *sec, asection *group, |
9568 | struct bfd_link_info *info) | |
3d7f7666 L |
9569 | { |
9570 | asection *first = elf_next_in_group (group); | |
9571 | asection *s = first; | |
9572 | ||
9573 | while (s != NULL) | |
9574 | { | |
c0f00686 | 9575 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
9576 | return s; |
9577 | ||
83180ade | 9578 | s = elf_next_in_group (s); |
3d7f7666 L |
9579 | if (s == first) |
9580 | break; | |
9581 | } | |
9582 | ||
9583 | return NULL; | |
9584 | } | |
9585 | ||
01b3c8ab | 9586 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
9587 | to replace it. Return the replacement if it is OK. Otherwise return |
9588 | NULL. */ | |
01b3c8ab L |
9589 | |
9590 | asection * | |
c0f00686 | 9591 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
9592 | { |
9593 | asection *kept; | |
9594 | ||
9595 | kept = sec->kept_section; | |
9596 | if (kept != NULL) | |
9597 | { | |
c2370991 | 9598 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 9599 | kept = match_group_member (sec, kept, info); |
1dd2625f BW |
9600 | if (kept != NULL |
9601 | && ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
9602 | != (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
01b3c8ab | 9603 | kept = NULL; |
c2370991 | 9604 | sec->kept_section = kept; |
01b3c8ab L |
9605 | } |
9606 | return kept; | |
9607 | } | |
9608 | ||
c152c796 AM |
9609 | /* Link an input file into the linker output file. This function |
9610 | handles all the sections and relocations of the input file at once. | |
9611 | This is so that we only have to read the local symbols once, and | |
9612 | don't have to keep them in memory. */ | |
9613 | ||
9614 | static bfd_boolean | |
8b127cbc | 9615 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 9616 | { |
ece5ef60 | 9617 | int (*relocate_section) |
c152c796 AM |
9618 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
9619 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
9620 | bfd *output_bfd; | |
9621 | Elf_Internal_Shdr *symtab_hdr; | |
9622 | size_t locsymcount; | |
9623 | size_t extsymoff; | |
9624 | Elf_Internal_Sym *isymbuf; | |
9625 | Elf_Internal_Sym *isym; | |
9626 | Elf_Internal_Sym *isymend; | |
9627 | long *pindex; | |
9628 | asection **ppsection; | |
9629 | asection *o; | |
9630 | const struct elf_backend_data *bed; | |
c152c796 | 9631 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
9632 | bfd_size_type address_size; |
9633 | bfd_vma r_type_mask; | |
9634 | int r_sym_shift; | |
ffbc01cc | 9635 | bfd_boolean have_file_sym = FALSE; |
c152c796 | 9636 | |
8b127cbc | 9637 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
9638 | bed = get_elf_backend_data (output_bfd); |
9639 | relocate_section = bed->elf_backend_relocate_section; | |
9640 | ||
9641 | /* If this is a dynamic object, we don't want to do anything here: | |
9642 | we don't want the local symbols, and we don't want the section | |
9643 | contents. */ | |
9644 | if ((input_bfd->flags & DYNAMIC) != 0) | |
9645 | return TRUE; | |
9646 | ||
c152c796 AM |
9647 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
9648 | if (elf_bad_symtab (input_bfd)) | |
9649 | { | |
9650 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
9651 | extsymoff = 0; | |
9652 | } | |
9653 | else | |
9654 | { | |
9655 | locsymcount = symtab_hdr->sh_info; | |
9656 | extsymoff = symtab_hdr->sh_info; | |
9657 | } | |
9658 | ||
9659 | /* Read the local symbols. */ | |
9660 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
9661 | if (isymbuf == NULL && locsymcount != 0) | |
9662 | { | |
9663 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
9664 | flinfo->internal_syms, |
9665 | flinfo->external_syms, | |
9666 | flinfo->locsym_shndx); | |
c152c796 AM |
9667 | if (isymbuf == NULL) |
9668 | return FALSE; | |
9669 | } | |
9670 | ||
9671 | /* Find local symbol sections and adjust values of symbols in | |
9672 | SEC_MERGE sections. Write out those local symbols we know are | |
9673 | going into the output file. */ | |
9674 | isymend = isymbuf + locsymcount; | |
8b127cbc | 9675 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
9676 | isym < isymend; |
9677 | isym++, pindex++, ppsection++) | |
9678 | { | |
9679 | asection *isec; | |
9680 | const char *name; | |
9681 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
9682 | long indx; |
9683 | int ret; | |
c152c796 AM |
9684 | |
9685 | *pindex = -1; | |
9686 | ||
9687 | if (elf_bad_symtab (input_bfd)) | |
9688 | { | |
9689 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
9690 | { | |
9691 | *ppsection = NULL; | |
9692 | continue; | |
9693 | } | |
9694 | } | |
9695 | ||
9696 | if (isym->st_shndx == SHN_UNDEF) | |
9697 | isec = bfd_und_section_ptr; | |
c152c796 AM |
9698 | else if (isym->st_shndx == SHN_ABS) |
9699 | isec = bfd_abs_section_ptr; | |
9700 | else if (isym->st_shndx == SHN_COMMON) | |
9701 | isec = bfd_com_section_ptr; | |
9702 | else | |
9703 | { | |
cb33740c AM |
9704 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
9705 | if (isec == NULL) | |
9706 | { | |
9707 | /* Don't attempt to output symbols with st_shnx in the | |
9708 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
9709 | *ppsection = NULL; | |
9710 | continue; | |
9711 | } | |
dbaa2011 | 9712 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
9713 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
9714 | isym->st_value = | |
9715 | _bfd_merged_section_offset (output_bfd, &isec, | |
9716 | elf_section_data (isec)->sec_info, | |
9717 | isym->st_value); | |
c152c796 AM |
9718 | } |
9719 | ||
9720 | *ppsection = isec; | |
9721 | ||
d983c8c5 AM |
9722 | /* Don't output the first, undefined, symbol. In fact, don't |
9723 | output any undefined local symbol. */ | |
9724 | if (isec == bfd_und_section_ptr) | |
c152c796 AM |
9725 | continue; |
9726 | ||
9727 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
9728 | { | |
9729 | /* We never output section symbols. Instead, we use the | |
9730 | section symbol of the corresponding section in the output | |
9731 | file. */ | |
9732 | continue; | |
9733 | } | |
9734 | ||
9735 | /* If we are stripping all symbols, we don't want to output this | |
9736 | one. */ | |
8b127cbc | 9737 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
9738 | continue; |
9739 | ||
9740 | /* If we are discarding all local symbols, we don't want to | |
9741 | output this one. If we are generating a relocatable output | |
9742 | file, then some of the local symbols may be required by | |
9743 | relocs; we output them below as we discover that they are | |
9744 | needed. */ | |
8b127cbc | 9745 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
9746 | continue; |
9747 | ||
9748 | /* If this symbol is defined in a section which we are | |
f02571c5 AM |
9749 | discarding, we don't need to keep it. */ |
9750 | if (isym->st_shndx != SHN_UNDEF | |
4fbb74a6 AM |
9751 | && isym->st_shndx < SHN_LORESERVE |
9752 | && bfd_section_removed_from_list (output_bfd, | |
9753 | isec->output_section)) | |
e75a280b L |
9754 | continue; |
9755 | ||
c152c796 AM |
9756 | /* Get the name of the symbol. */ |
9757 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
9758 | isym->st_name); | |
9759 | if (name == NULL) | |
9760 | return FALSE; | |
9761 | ||
9762 | /* See if we are discarding symbols with this name. */ | |
8b127cbc AM |
9763 | if ((flinfo->info->strip == strip_some |
9764 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, FALSE, FALSE) | |
c152c796 | 9765 | == NULL)) |
8b127cbc | 9766 | || (((flinfo->info->discard == discard_sec_merge |
0e1862bb L |
9767 | && (isec->flags & SEC_MERGE) |
9768 | && !bfd_link_relocatable (flinfo->info)) | |
8b127cbc | 9769 | || flinfo->info->discard == discard_l) |
c152c796 AM |
9770 | && bfd_is_local_label_name (input_bfd, name))) |
9771 | continue; | |
9772 | ||
ffbc01cc AM |
9773 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
9774 | { | |
ce875075 AM |
9775 | if (input_bfd->lto_output) |
9776 | /* -flto puts a temp file name here. This means builds | |
9777 | are not reproducible. Discard the symbol. */ | |
9778 | continue; | |
ffbc01cc AM |
9779 | have_file_sym = TRUE; |
9780 | flinfo->filesym_count += 1; | |
9781 | } | |
9782 | if (!have_file_sym) | |
9783 | { | |
9784 | /* In the absence of debug info, bfd_find_nearest_line uses | |
9785 | FILE symbols to determine the source file for local | |
9786 | function symbols. Provide a FILE symbol here if input | |
9787 | files lack such, so that their symbols won't be | |
9788 | associated with a previous input file. It's not the | |
9789 | source file, but the best we can do. */ | |
9790 | have_file_sym = TRUE; | |
9791 | flinfo->filesym_count += 1; | |
9792 | memset (&osym, 0, sizeof (osym)); | |
9793 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9794 | osym.st_shndx = SHN_ABS; | |
ef10c3ac L |
9795 | if (!elf_link_output_symstrtab (flinfo, |
9796 | (input_bfd->lto_output ? NULL | |
9797 | : input_bfd->filename), | |
9798 | &osym, bfd_abs_section_ptr, | |
9799 | NULL)) | |
ffbc01cc AM |
9800 | return FALSE; |
9801 | } | |
9802 | ||
c152c796 AM |
9803 | osym = *isym; |
9804 | ||
9805 | /* Adjust the section index for the output file. */ | |
9806 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9807 | isec->output_section); | |
9808 | if (osym.st_shndx == SHN_BAD) | |
9809 | return FALSE; | |
9810 | ||
c152c796 AM |
9811 | /* ELF symbols in relocatable files are section relative, but |
9812 | in executable files they are virtual addresses. Note that | |
9813 | this code assumes that all ELF sections have an associated | |
9814 | BFD section with a reasonable value for output_offset; below | |
9815 | we assume that they also have a reasonable value for | |
9816 | output_section. Any special sections must be set up to meet | |
9817 | these requirements. */ | |
9818 | osym.st_value += isec->output_offset; | |
0e1862bb | 9819 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
9820 | { |
9821 | osym.st_value += isec->output_section->vma; | |
9822 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
9823 | { | |
9824 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
8b127cbc AM |
9825 | BFD_ASSERT (elf_hash_table (flinfo->info)->tls_sec != NULL); |
9826 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
c152c796 AM |
9827 | } |
9828 | } | |
9829 | ||
6e0b88f1 | 9830 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac | 9831 | ret = elf_link_output_symstrtab (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 9832 | if (ret == 0) |
c152c796 | 9833 | return FALSE; |
6e0b88f1 AM |
9834 | else if (ret == 1) |
9835 | *pindex = indx; | |
c152c796 AM |
9836 | } |
9837 | ||
310fd250 L |
9838 | if (bed->s->arch_size == 32) |
9839 | { | |
9840 | r_type_mask = 0xff; | |
9841 | r_sym_shift = 8; | |
9842 | address_size = 4; | |
9843 | } | |
9844 | else | |
9845 | { | |
9846 | r_type_mask = 0xffffffff; | |
9847 | r_sym_shift = 32; | |
9848 | address_size = 8; | |
9849 | } | |
9850 | ||
c152c796 AM |
9851 | /* Relocate the contents of each section. */ |
9852 | sym_hashes = elf_sym_hashes (input_bfd); | |
9853 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
9854 | { | |
9855 | bfd_byte *contents; | |
9856 | ||
9857 | if (! o->linker_mark) | |
9858 | { | |
9859 | /* This section was omitted from the link. */ | |
9860 | continue; | |
9861 | } | |
9862 | ||
0e1862bb | 9863 | if (bfd_link_relocatable (flinfo->info) |
bcacc0f5 AM |
9864 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
9865 | { | |
9866 | /* Deal with the group signature symbol. */ | |
9867 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
9868 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
9869 | asection *osec = o->output_section; | |
9870 | ||
9871 | if (symndx >= locsymcount | |
9872 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 9873 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
9874 | { |
9875 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
9876 | while (h->root.type == bfd_link_hash_indirect | |
9877 | || h->root.type == bfd_link_hash_warning) | |
9878 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9879 | /* Arrange for symbol to be output. */ | |
9880 | h->indx = -2; | |
9881 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
9882 | } | |
9883 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
9884 | { | |
9885 | /* We'll use the output section target_index. */ | |
8b127cbc | 9886 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
9887 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
9888 | } | |
9889 | else | |
9890 | { | |
8b127cbc | 9891 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
9892 | { |
9893 | /* Otherwise output the local symbol now. */ | |
9894 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 9895 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 9896 | const char *name; |
6e0b88f1 AM |
9897 | long indx; |
9898 | int ret; | |
bcacc0f5 AM |
9899 | |
9900 | name = bfd_elf_string_from_elf_section (input_bfd, | |
9901 | symtab_hdr->sh_link, | |
9902 | sym.st_name); | |
9903 | if (name == NULL) | |
9904 | return FALSE; | |
9905 | ||
9906 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9907 | sec); | |
9908 | if (sym.st_shndx == SHN_BAD) | |
9909 | return FALSE; | |
9910 | ||
9911 | sym.st_value += o->output_offset; | |
9912 | ||
6e0b88f1 | 9913 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
9914 | ret = elf_link_output_symstrtab (flinfo, name, &sym, o, |
9915 | NULL); | |
6e0b88f1 | 9916 | if (ret == 0) |
bcacc0f5 | 9917 | return FALSE; |
6e0b88f1 | 9918 | else if (ret == 1) |
8b127cbc | 9919 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
9920 | else |
9921 | abort (); | |
bcacc0f5 AM |
9922 | } |
9923 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 9924 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
9925 | } |
9926 | } | |
9927 | ||
c152c796 | 9928 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 9929 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
9930 | continue; |
9931 | ||
9932 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
9933 | { | |
9934 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
9935 | or somesuch. */ | |
9936 | continue; | |
9937 | } | |
9938 | ||
9939 | /* Get the contents of the section. They have been cached by a | |
9940 | relaxation routine. Note that o is a section in an input | |
9941 | file, so the contents field will not have been set by any of | |
9942 | the routines which work on output files. */ | |
9943 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
9944 | { |
9945 | contents = elf_section_data (o)->this_hdr.contents; | |
9946 | if (bed->caches_rawsize | |
9947 | && o->rawsize != 0 | |
9948 | && o->rawsize < o->size) | |
9949 | { | |
9950 | memcpy (flinfo->contents, contents, o->rawsize); | |
9951 | contents = flinfo->contents; | |
9952 | } | |
9953 | } | |
c152c796 AM |
9954 | else |
9955 | { | |
8b127cbc | 9956 | contents = flinfo->contents; |
4a114e3e | 9957 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
c152c796 AM |
9958 | return FALSE; |
9959 | } | |
9960 | ||
9961 | if ((o->flags & SEC_RELOC) != 0) | |
9962 | { | |
9963 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 9964 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 9965 | int action_discarded; |
ece5ef60 | 9966 | int ret; |
c152c796 AM |
9967 | |
9968 | /* Get the swapped relocs. */ | |
9969 | internal_relocs | |
8b127cbc AM |
9970 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
9971 | flinfo->internal_relocs, FALSE); | |
c152c796 AM |
9972 | if (internal_relocs == NULL |
9973 | && o->reloc_count > 0) | |
9974 | return FALSE; | |
9975 | ||
310fd250 L |
9976 | /* We need to reverse-copy input .ctors/.dtors sections if |
9977 | they are placed in .init_array/.finit_array for output. */ | |
9978 | if (o->size > address_size | |
9979 | && ((strncmp (o->name, ".ctors", 6) == 0 | |
9980 | && strcmp (o->output_section->name, | |
9981 | ".init_array") == 0) | |
9982 | || (strncmp (o->name, ".dtors", 6) == 0 | |
9983 | && strcmp (o->output_section->name, | |
9984 | ".fini_array") == 0)) | |
9985 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 9986 | { |
310fd250 L |
9987 | if (o->size != o->reloc_count * address_size) |
9988 | { | |
9989 | (*_bfd_error_handler) | |
9990 | (_("error: %B: size of section %A is not " | |
9991 | "multiple of address size"), | |
9992 | input_bfd, o); | |
9993 | bfd_set_error (bfd_error_on_input); | |
9994 | return FALSE; | |
9995 | } | |
9996 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
9997 | } |
9998 | ||
0f02bbd9 | 9999 | action_discarded = -1; |
c152c796 | 10000 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
10001 | action_discarded = (*bed->action_discarded) (o); |
10002 | ||
10003 | /* Run through the relocs evaluating complex reloc symbols and | |
10004 | looking for relocs against symbols from discarded sections | |
10005 | or section symbols from removed link-once sections. | |
10006 | Complain about relocs against discarded sections. Zero | |
10007 | relocs against removed link-once sections. */ | |
10008 | ||
10009 | rel = internal_relocs; | |
10010 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
10011 | for ( ; rel < relend; rel++) | |
c152c796 | 10012 | { |
0f02bbd9 AM |
10013 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
10014 | unsigned int s_type; | |
10015 | asection **ps, *sec; | |
10016 | struct elf_link_hash_entry *h = NULL; | |
10017 | const char *sym_name; | |
c152c796 | 10018 | |
0f02bbd9 AM |
10019 | if (r_symndx == STN_UNDEF) |
10020 | continue; | |
c152c796 | 10021 | |
0f02bbd9 AM |
10022 | if (r_symndx >= locsymcount |
10023 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10024 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
10025 | { |
10026 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 10027 | |
0f02bbd9 AM |
10028 | /* Badly formatted input files can contain relocs that |
10029 | reference non-existant symbols. Check here so that | |
10030 | we do not seg fault. */ | |
10031 | if (h == NULL) | |
c152c796 | 10032 | { |
0f02bbd9 | 10033 | char buffer [32]; |
dce669a1 | 10034 | |
0f02bbd9 AM |
10035 | sprintf_vma (buffer, rel->r_info); |
10036 | (*_bfd_error_handler) | |
10037 | (_("error: %B contains a reloc (0x%s) for section %A " | |
10038 | "that references a non-existent global symbol"), | |
10039 | input_bfd, o, buffer); | |
10040 | bfd_set_error (bfd_error_bad_value); | |
10041 | return FALSE; | |
10042 | } | |
3b36f7e6 | 10043 | |
0f02bbd9 AM |
10044 | while (h->root.type == bfd_link_hash_indirect |
10045 | || h->root.type == bfd_link_hash_warning) | |
10046 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 10047 | |
0f02bbd9 | 10048 | s_type = h->type; |
cdd3575c | 10049 | |
9e2dec47 | 10050 | /* If a plugin symbol is referenced from a non-IR file, |
ca4be51c AM |
10051 | mark the symbol as undefined. Note that the |
10052 | linker may attach linker created dynamic sections | |
10053 | to the plugin bfd. Symbols defined in linker | |
10054 | created sections are not plugin symbols. */ | |
9e2dec47 L |
10055 | if (h->root.non_ir_ref |
10056 | && (h->root.type == bfd_link_hash_defined | |
10057 | || h->root.type == bfd_link_hash_defweak) | |
10058 | && (h->root.u.def.section->flags | |
10059 | & SEC_LINKER_CREATED) == 0 | |
10060 | && h->root.u.def.section->owner != NULL | |
10061 | && (h->root.u.def.section->owner->flags | |
10062 | & BFD_PLUGIN) != 0) | |
10063 | { | |
10064 | h->root.type = bfd_link_hash_undefined; | |
10065 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
10066 | } | |
10067 | ||
0f02bbd9 AM |
10068 | ps = NULL; |
10069 | if (h->root.type == bfd_link_hash_defined | |
10070 | || h->root.type == bfd_link_hash_defweak) | |
10071 | ps = &h->root.u.def.section; | |
10072 | ||
10073 | sym_name = h->root.root.string; | |
10074 | } | |
10075 | else | |
10076 | { | |
10077 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
10078 | ||
10079 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 10080 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
10081 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
10082 | sym, *ps); | |
10083 | } | |
c152c796 | 10084 | |
c301e700 | 10085 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
0e1862bb | 10086 | && !bfd_link_relocatable (flinfo->info)) |
0f02bbd9 AM |
10087 | { |
10088 | bfd_vma val; | |
10089 | bfd_vma dot = (rel->r_offset | |
10090 | + o->output_offset + o->output_section->vma); | |
10091 | #ifdef DEBUG | |
10092 | printf ("Encountered a complex symbol!"); | |
10093 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
9ccb8af9 AM |
10094 | input_bfd->filename, o->name, |
10095 | (long) (rel - internal_relocs)); | |
0f02bbd9 AM |
10096 | printf (" symbol: idx %8.8lx, name %s\n", |
10097 | r_symndx, sym_name); | |
10098 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
10099 | (unsigned long) rel->r_info, | |
10100 | (unsigned long) rel->r_offset); | |
10101 | #endif | |
8b127cbc | 10102 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 AM |
10103 | isymbuf, locsymcount, s_type == STT_SRELC)) |
10104 | return FALSE; | |
10105 | ||
10106 | /* Symbol evaluated OK. Update to absolute value. */ | |
10107 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
10108 | r_symndx, val); | |
10109 | continue; | |
10110 | } | |
10111 | ||
10112 | if (action_discarded != -1 && ps != NULL) | |
10113 | { | |
cdd3575c AM |
10114 | /* Complain if the definition comes from a |
10115 | discarded section. */ | |
dbaa2011 | 10116 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 10117 | { |
cf35638d | 10118 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 10119 | if (action_discarded & COMPLAIN) |
8b127cbc | 10120 | (*flinfo->info->callbacks->einfo) |
e1fffbe6 | 10121 | (_("%X`%s' referenced in section `%A' of %B: " |
58ac56d0 | 10122 | "defined in discarded section `%A' of %B\n"), |
e1fffbe6 | 10123 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 10124 | |
87e5235d | 10125 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 10126 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
10127 | really defined in the kept linkonce section. |
10128 | FIXME: This is quite broken. Modifying the | |
10129 | symbol here means we will be changing all later | |
e0ae6d6f | 10130 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 10131 | if (action_discarded & PRETEND) |
87e5235d | 10132 | { |
01b3c8ab L |
10133 | asection *kept; |
10134 | ||
c0f00686 | 10135 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 10136 | flinfo->info); |
01b3c8ab | 10137 | if (kept != NULL) |
87e5235d AM |
10138 | { |
10139 | *ps = kept; | |
10140 | continue; | |
10141 | } | |
10142 | } | |
c152c796 AM |
10143 | } |
10144 | } | |
10145 | } | |
10146 | ||
10147 | /* Relocate the section by invoking a back end routine. | |
10148 | ||
10149 | The back end routine is responsible for adjusting the | |
10150 | section contents as necessary, and (if using Rela relocs | |
10151 | and generating a relocatable output file) adjusting the | |
10152 | reloc addend as necessary. | |
10153 | ||
10154 | The back end routine does not have to worry about setting | |
10155 | the reloc address or the reloc symbol index. | |
10156 | ||
10157 | The back end routine is given a pointer to the swapped in | |
10158 | internal symbols, and can access the hash table entries | |
10159 | for the external symbols via elf_sym_hashes (input_bfd). | |
10160 | ||
10161 | When generating relocatable output, the back end routine | |
10162 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
10163 | output symbol is going to be a section symbol | |
10164 | corresponding to the output section, which will require | |
10165 | the addend to be adjusted. */ | |
10166 | ||
8b127cbc | 10167 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
10168 | input_bfd, o, contents, |
10169 | internal_relocs, | |
10170 | isymbuf, | |
8b127cbc | 10171 | flinfo->sections); |
ece5ef60 | 10172 | if (!ret) |
c152c796 AM |
10173 | return FALSE; |
10174 | ||
ece5ef60 | 10175 | if (ret == 2 |
0e1862bb | 10176 | || bfd_link_relocatable (flinfo->info) |
8b127cbc | 10177 | || flinfo->info->emitrelocations) |
c152c796 AM |
10178 | { |
10179 | Elf_Internal_Rela *irela; | |
d4730f92 | 10180 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
10181 | bfd_vma last_offset; |
10182 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
10183 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
10184 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 10185 | unsigned int next_erel; |
c152c796 | 10186 | bfd_boolean rela_normal; |
d4730f92 | 10187 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 10188 | |
d4730f92 BS |
10189 | esdi = elf_section_data (o); |
10190 | esdo = elf_section_data (o->output_section); | |
10191 | rela_normal = FALSE; | |
c152c796 AM |
10192 | |
10193 | /* Adjust the reloc addresses and symbol indices. */ | |
10194 | ||
10195 | irela = internal_relocs; | |
10196 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
d4730f92 BS |
10197 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
10198 | /* We start processing the REL relocs, if any. When we reach | |
10199 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
10200 | irelamid = irela; | |
10201 | if (esdi->rel.hdr != NULL) | |
10202 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
10203 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10204 | rel_hash_list = rel_hash; |
d4730f92 | 10205 | rela_hash_list = NULL; |
c152c796 | 10206 | last_offset = o->output_offset; |
0e1862bb | 10207 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10208 | last_offset += o->output_section->vma; |
10209 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
10210 | { | |
10211 | unsigned long r_symndx; | |
10212 | asection *sec; | |
10213 | Elf_Internal_Sym sym; | |
10214 | ||
10215 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
10216 | { | |
10217 | rel_hash++; | |
10218 | next_erel = 0; | |
10219 | } | |
10220 | ||
d4730f92 BS |
10221 | if (irela == irelamid) |
10222 | { | |
10223 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
10224 | rela_hash_list = rel_hash; | |
10225 | rela_normal = bed->rela_normal; | |
10226 | } | |
10227 | ||
c152c796 | 10228 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 10229 | flinfo->info, o, |
c152c796 AM |
10230 | irela->r_offset); |
10231 | if (irela->r_offset >= (bfd_vma) -2) | |
10232 | { | |
10233 | /* This is a reloc for a deleted entry or somesuch. | |
10234 | Turn it into an R_*_NONE reloc, at the same | |
10235 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 10236 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
10237 | being ordered. */ |
10238 | irela->r_offset = last_offset; | |
10239 | irela->r_info = 0; | |
10240 | irela->r_addend = 0; | |
10241 | continue; | |
10242 | } | |
10243 | ||
10244 | irela->r_offset += o->output_offset; | |
10245 | ||
10246 | /* Relocs in an executable have to be virtual addresses. */ | |
0e1862bb | 10247 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10248 | irela->r_offset += o->output_section->vma; |
10249 | ||
10250 | last_offset = irela->r_offset; | |
10251 | ||
10252 | r_symndx = irela->r_info >> r_sym_shift; | |
10253 | if (r_symndx == STN_UNDEF) | |
10254 | continue; | |
10255 | ||
10256 | if (r_symndx >= locsymcount | |
10257 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 10258 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
10259 | { |
10260 | struct elf_link_hash_entry *rh; | |
10261 | unsigned long indx; | |
10262 | ||
10263 | /* This is a reloc against a global symbol. We | |
10264 | have not yet output all the local symbols, so | |
10265 | we do not know the symbol index of any global | |
10266 | symbol. We set the rel_hash entry for this | |
10267 | reloc to point to the global hash table entry | |
10268 | for this symbol. The symbol index is then | |
ee75fd95 | 10269 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
10270 | indx = r_symndx - extsymoff; |
10271 | rh = elf_sym_hashes (input_bfd)[indx]; | |
10272 | while (rh->root.type == bfd_link_hash_indirect | |
10273 | || rh->root.type == bfd_link_hash_warning) | |
10274 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
10275 | ||
10276 | /* Setting the index to -2 tells | |
10277 | elf_link_output_extsym that this symbol is | |
10278 | used by a reloc. */ | |
10279 | BFD_ASSERT (rh->indx < 0); | |
10280 | rh->indx = -2; | |
10281 | ||
10282 | *rel_hash = rh; | |
10283 | ||
10284 | continue; | |
10285 | } | |
10286 | ||
10287 | /* This is a reloc against a local symbol. */ | |
10288 | ||
10289 | *rel_hash = NULL; | |
10290 | sym = isymbuf[r_symndx]; | |
8b127cbc | 10291 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
10292 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
10293 | { | |
10294 | /* I suppose the backend ought to fill in the | |
10295 | section of any STT_SECTION symbol against a | |
6a8d1586 | 10296 | processor specific section. */ |
cf35638d | 10297 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
10298 | if (bfd_is_abs_section (sec)) |
10299 | ; | |
c152c796 AM |
10300 | else if (sec == NULL || sec->owner == NULL) |
10301 | { | |
10302 | bfd_set_error (bfd_error_bad_value); | |
10303 | return FALSE; | |
10304 | } | |
10305 | else | |
10306 | { | |
6a8d1586 AM |
10307 | asection *osec = sec->output_section; |
10308 | ||
10309 | /* If we have discarded a section, the output | |
10310 | section will be the absolute section. In | |
ab96bf03 AM |
10311 | case of discarded SEC_MERGE sections, use |
10312 | the kept section. relocate_section should | |
10313 | have already handled discarded linkonce | |
10314 | sections. */ | |
6a8d1586 AM |
10315 | if (bfd_is_abs_section (osec) |
10316 | && sec->kept_section != NULL | |
10317 | && sec->kept_section->output_section != NULL) | |
10318 | { | |
10319 | osec = sec->kept_section->output_section; | |
10320 | irela->r_addend -= osec->vma; | |
10321 | } | |
10322 | ||
10323 | if (!bfd_is_abs_section (osec)) | |
10324 | { | |
10325 | r_symndx = osec->target_index; | |
cf35638d | 10326 | if (r_symndx == STN_UNDEF) |
74541ad4 | 10327 | { |
051d833a AM |
10328 | irela->r_addend += osec->vma; |
10329 | osec = _bfd_nearby_section (output_bfd, osec, | |
10330 | osec->vma); | |
10331 | irela->r_addend -= osec->vma; | |
10332 | r_symndx = osec->target_index; | |
74541ad4 | 10333 | } |
6a8d1586 | 10334 | } |
c152c796 AM |
10335 | } |
10336 | ||
10337 | /* Adjust the addend according to where the | |
10338 | section winds up in the output section. */ | |
10339 | if (rela_normal) | |
10340 | irela->r_addend += sec->output_offset; | |
10341 | } | |
10342 | else | |
10343 | { | |
8b127cbc | 10344 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
10345 | { |
10346 | unsigned long shlink; | |
10347 | const char *name; | |
10348 | asection *osec; | |
6e0b88f1 | 10349 | long indx; |
c152c796 | 10350 | |
8b127cbc | 10351 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
10352 | { |
10353 | /* You can't do ld -r -s. */ | |
10354 | bfd_set_error (bfd_error_invalid_operation); | |
10355 | return FALSE; | |
10356 | } | |
10357 | ||
10358 | /* This symbol was skipped earlier, but | |
10359 | since it is needed by a reloc, we | |
10360 | must output it now. */ | |
10361 | shlink = symtab_hdr->sh_link; | |
10362 | name = (bfd_elf_string_from_elf_section | |
10363 | (input_bfd, shlink, sym.st_name)); | |
10364 | if (name == NULL) | |
10365 | return FALSE; | |
10366 | ||
10367 | osec = sec->output_section; | |
10368 | sym.st_shndx = | |
10369 | _bfd_elf_section_from_bfd_section (output_bfd, | |
10370 | osec); | |
10371 | if (sym.st_shndx == SHN_BAD) | |
10372 | return FALSE; | |
10373 | ||
10374 | sym.st_value += sec->output_offset; | |
0e1862bb | 10375 | if (!bfd_link_relocatable (flinfo->info)) |
c152c796 AM |
10376 | { |
10377 | sym.st_value += osec->vma; | |
10378 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
10379 | { | |
10380 | /* STT_TLS symbols are relative to PT_TLS | |
10381 | segment base. */ | |
8b127cbc | 10382 | BFD_ASSERT (elf_hash_table (flinfo->info) |
c152c796 | 10383 | ->tls_sec != NULL); |
8b127cbc | 10384 | sym.st_value -= (elf_hash_table (flinfo->info) |
c152c796 AM |
10385 | ->tls_sec->vma); |
10386 | } | |
10387 | } | |
10388 | ||
6e0b88f1 | 10389 | indx = bfd_get_symcount (output_bfd); |
ef10c3ac L |
10390 | ret = elf_link_output_symstrtab (flinfo, name, |
10391 | &sym, sec, | |
10392 | NULL); | |
6e0b88f1 | 10393 | if (ret == 0) |
c152c796 | 10394 | return FALSE; |
6e0b88f1 | 10395 | else if (ret == 1) |
8b127cbc | 10396 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
10397 | else |
10398 | abort (); | |
c152c796 AM |
10399 | } |
10400 | ||
8b127cbc | 10401 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
10402 | } |
10403 | ||
10404 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
10405 | | (irela->r_info & r_type_mask)); | |
10406 | } | |
10407 | ||
10408 | /* Swap out the relocs. */ | |
d4730f92 BS |
10409 | input_rel_hdr = esdi->rel.hdr; |
10410 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 10411 | { |
d4730f92 BS |
10412 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
10413 | input_rel_hdr, | |
10414 | internal_relocs, | |
10415 | rel_hash_list)) | |
10416 | return FALSE; | |
c152c796 AM |
10417 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
10418 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10419 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
10420 | } |
10421 | ||
10422 | input_rela_hdr = esdi->rela.hdr; | |
10423 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
10424 | { | |
eac338cf | 10425 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 10426 | input_rela_hdr, |
eac338cf | 10427 | internal_relocs, |
d4730f92 | 10428 | rela_hash_list)) |
c152c796 AM |
10429 | return FALSE; |
10430 | } | |
10431 | } | |
10432 | } | |
10433 | ||
10434 | /* Write out the modified section contents. */ | |
10435 | if (bed->elf_backend_write_section | |
8b127cbc | 10436 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 10437 | contents)) |
c152c796 AM |
10438 | { |
10439 | /* Section written out. */ | |
10440 | } | |
10441 | else switch (o->sec_info_type) | |
10442 | { | |
dbaa2011 | 10443 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
10444 | if (! (_bfd_write_section_stabs |
10445 | (output_bfd, | |
8b127cbc | 10446 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 AM |
10447 | o, &elf_section_data (o)->sec_info, contents))) |
10448 | return FALSE; | |
10449 | break; | |
dbaa2011 | 10450 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
10451 | if (! _bfd_write_merged_section (output_bfd, o, |
10452 | elf_section_data (o)->sec_info)) | |
10453 | return FALSE; | |
10454 | break; | |
dbaa2011 | 10455 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 10456 | { |
8b127cbc | 10457 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 AM |
10458 | o, contents)) |
10459 | return FALSE; | |
10460 | } | |
10461 | break; | |
2f0c68f2 CM |
10462 | case SEC_INFO_TYPE_EH_FRAME_ENTRY: |
10463 | { | |
10464 | if (! _bfd_elf_write_section_eh_frame_entry (output_bfd, | |
10465 | flinfo->info, | |
10466 | o, contents)) | |
10467 | return FALSE; | |
10468 | } | |
10469 | break; | |
c152c796 AM |
10470 | default: |
10471 | { | |
5dabe785 | 10472 | /* FIXME: octets_per_byte. */ |
310fd250 L |
10473 | if (! (o->flags & SEC_EXCLUDE)) |
10474 | { | |
10475 | file_ptr offset = (file_ptr) o->output_offset; | |
10476 | bfd_size_type todo = o->size; | |
10477 | if ((o->flags & SEC_ELF_REVERSE_COPY)) | |
10478 | { | |
10479 | /* Reverse-copy input section to output. */ | |
10480 | do | |
10481 | { | |
10482 | todo -= address_size; | |
10483 | if (! bfd_set_section_contents (output_bfd, | |
10484 | o->output_section, | |
10485 | contents + todo, | |
10486 | offset, | |
10487 | address_size)) | |
10488 | return FALSE; | |
10489 | if (todo == 0) | |
10490 | break; | |
10491 | offset += address_size; | |
10492 | } | |
10493 | while (1); | |
10494 | } | |
10495 | else if (! bfd_set_section_contents (output_bfd, | |
10496 | o->output_section, | |
10497 | contents, | |
10498 | offset, todo)) | |
10499 | return FALSE; | |
10500 | } | |
c152c796 AM |
10501 | } |
10502 | break; | |
10503 | } | |
10504 | } | |
10505 | ||
10506 | return TRUE; | |
10507 | } | |
10508 | ||
10509 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 10510 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
10511 | is used to build constructor and destructor tables when linking |
10512 | with -Ur. */ | |
10513 | ||
10514 | static bfd_boolean | |
10515 | elf_reloc_link_order (bfd *output_bfd, | |
10516 | struct bfd_link_info *info, | |
10517 | asection *output_section, | |
10518 | struct bfd_link_order *link_order) | |
10519 | { | |
10520 | reloc_howto_type *howto; | |
10521 | long indx; | |
10522 | bfd_vma offset; | |
10523 | bfd_vma addend; | |
d4730f92 | 10524 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
10525 | struct elf_link_hash_entry **rel_hash_ptr; |
10526 | Elf_Internal_Shdr *rel_hdr; | |
10527 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
10528 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
10529 | bfd_byte *erel; | |
10530 | unsigned int i; | |
d4730f92 | 10531 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
10532 | |
10533 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
10534 | if (howto == NULL) | |
10535 | { | |
10536 | bfd_set_error (bfd_error_bad_value); | |
10537 | return FALSE; | |
10538 | } | |
10539 | ||
10540 | addend = link_order->u.reloc.p->addend; | |
10541 | ||
d4730f92 BS |
10542 | if (esdo->rel.hdr) |
10543 | reldata = &esdo->rel; | |
10544 | else if (esdo->rela.hdr) | |
10545 | reldata = &esdo->rela; | |
10546 | else | |
10547 | { | |
10548 | reldata = NULL; | |
10549 | BFD_ASSERT (0); | |
10550 | } | |
10551 | ||
c152c796 | 10552 | /* Figure out the symbol index. */ |
d4730f92 | 10553 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
10554 | if (link_order->type == bfd_section_reloc_link_order) |
10555 | { | |
10556 | indx = link_order->u.reloc.p->u.section->target_index; | |
10557 | BFD_ASSERT (indx != 0); | |
10558 | *rel_hash_ptr = NULL; | |
10559 | } | |
10560 | else | |
10561 | { | |
10562 | struct elf_link_hash_entry *h; | |
10563 | ||
10564 | /* Treat a reloc against a defined symbol as though it were | |
10565 | actually against the section. */ | |
10566 | h = ((struct elf_link_hash_entry *) | |
10567 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
10568 | link_order->u.reloc.p->u.name, | |
10569 | FALSE, FALSE, TRUE)); | |
10570 | if (h != NULL | |
10571 | && (h->root.type == bfd_link_hash_defined | |
10572 | || h->root.type == bfd_link_hash_defweak)) | |
10573 | { | |
10574 | asection *section; | |
10575 | ||
10576 | section = h->root.u.def.section; | |
10577 | indx = section->output_section->target_index; | |
10578 | *rel_hash_ptr = NULL; | |
10579 | /* It seems that we ought to add the symbol value to the | |
10580 | addend here, but in practice it has already been added | |
10581 | because it was passed to constructor_callback. */ | |
10582 | addend += section->output_section->vma + section->output_offset; | |
10583 | } | |
10584 | else if (h != NULL) | |
10585 | { | |
10586 | /* Setting the index to -2 tells elf_link_output_extsym that | |
10587 | this symbol is used by a reloc. */ | |
10588 | h->indx = -2; | |
10589 | *rel_hash_ptr = h; | |
10590 | indx = 0; | |
10591 | } | |
10592 | else | |
10593 | { | |
10594 | if (! ((*info->callbacks->unattached_reloc) | |
10595 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) | |
10596 | return FALSE; | |
10597 | indx = 0; | |
10598 | } | |
10599 | } | |
10600 | ||
10601 | /* If this is an inplace reloc, we must write the addend into the | |
10602 | object file. */ | |
10603 | if (howto->partial_inplace && addend != 0) | |
10604 | { | |
10605 | bfd_size_type size; | |
10606 | bfd_reloc_status_type rstat; | |
10607 | bfd_byte *buf; | |
10608 | bfd_boolean ok; | |
10609 | const char *sym_name; | |
10610 | ||
a50b1753 NC |
10611 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
10612 | buf = (bfd_byte *) bfd_zmalloc (size); | |
6346d5ca | 10613 | if (buf == NULL && size != 0) |
c152c796 AM |
10614 | return FALSE; |
10615 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
10616 | switch (rstat) | |
10617 | { | |
10618 | case bfd_reloc_ok: | |
10619 | break; | |
10620 | ||
10621 | default: | |
10622 | case bfd_reloc_outofrange: | |
10623 | abort (); | |
10624 | ||
10625 | case bfd_reloc_overflow: | |
10626 | if (link_order->type == bfd_section_reloc_link_order) | |
10627 | sym_name = bfd_section_name (output_bfd, | |
10628 | link_order->u.reloc.p->u.section); | |
10629 | else | |
10630 | sym_name = link_order->u.reloc.p->u.name; | |
10631 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
10632 | (info, NULL, sym_name, howto->name, addend, NULL, |
10633 | NULL, (bfd_vma) 0))) | |
c152c796 AM |
10634 | { |
10635 | free (buf); | |
10636 | return FALSE; | |
10637 | } | |
10638 | break; | |
10639 | } | |
10640 | ok = bfd_set_section_contents (output_bfd, output_section, buf, | |
10641 | link_order->offset, size); | |
10642 | free (buf); | |
10643 | if (! ok) | |
10644 | return FALSE; | |
10645 | } | |
10646 | ||
10647 | /* The address of a reloc is relative to the section in a | |
10648 | relocatable file, and is a virtual address in an executable | |
10649 | file. */ | |
10650 | offset = link_order->offset; | |
0e1862bb | 10651 | if (! bfd_link_relocatable (info)) |
c152c796 AM |
10652 | offset += output_section->vma; |
10653 | ||
10654 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
10655 | { | |
10656 | irel[i].r_offset = offset; | |
10657 | irel[i].r_info = 0; | |
10658 | irel[i].r_addend = 0; | |
10659 | } | |
10660 | if (bed->s->arch_size == 32) | |
10661 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
10662 | else | |
10663 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
10664 | ||
d4730f92 | 10665 | rel_hdr = reldata->hdr; |
c152c796 AM |
10666 | erel = rel_hdr->contents; |
10667 | if (rel_hdr->sh_type == SHT_REL) | |
10668 | { | |
d4730f92 | 10669 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
10670 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
10671 | } | |
10672 | else | |
10673 | { | |
10674 | irel[0].r_addend = addend; | |
d4730f92 | 10675 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
10676 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
10677 | } | |
10678 | ||
d4730f92 | 10679 | ++reldata->count; |
c152c796 AM |
10680 | |
10681 | return TRUE; | |
10682 | } | |
10683 | ||
0b52efa6 PB |
10684 | |
10685 | /* Get the output vma of the section pointed to by the sh_link field. */ | |
10686 | ||
10687 | static bfd_vma | |
10688 | elf_get_linked_section_vma (struct bfd_link_order *p) | |
10689 | { | |
10690 | Elf_Internal_Shdr **elf_shdrp; | |
10691 | asection *s; | |
10692 | int elfsec; | |
10693 | ||
10694 | s = p->u.indirect.section; | |
10695 | elf_shdrp = elf_elfsections (s->owner); | |
10696 | elfsec = _bfd_elf_section_from_bfd_section (s->owner, s); | |
10697 | elfsec = elf_shdrp[elfsec]->sh_link; | |
185d09ad L |
10698 | /* PR 290: |
10699 | The Intel C compiler generates SHT_IA_64_UNWIND with | |
e04bcc6d | 10700 | SHF_LINK_ORDER. But it doesn't set the sh_link or |
185d09ad L |
10701 | sh_info fields. Hence we could get the situation |
10702 | where elfsec is 0. */ | |
10703 | if (elfsec == 0) | |
10704 | { | |
10705 | const struct elf_backend_data *bed | |
10706 | = get_elf_backend_data (s->owner); | |
10707 | if (bed->link_order_error_handler) | |
d003868e AM |
10708 | bed->link_order_error_handler |
10709 | (_("%B: warning: sh_link not set for section `%A'"), s->owner, s); | |
185d09ad L |
10710 | return 0; |
10711 | } | |
10712 | else | |
10713 | { | |
10714 | s = elf_shdrp[elfsec]->bfd_section; | |
10715 | return s->output_section->vma + s->output_offset; | |
10716 | } | |
0b52efa6 PB |
10717 | } |
10718 | ||
10719 | ||
10720 | /* Compare two sections based on the locations of the sections they are | |
10721 | linked to. Used by elf_fixup_link_order. */ | |
10722 | ||
10723 | static int | |
10724 | compare_link_order (const void * a, const void * b) | |
10725 | { | |
10726 | bfd_vma apos; | |
10727 | bfd_vma bpos; | |
10728 | ||
10729 | apos = elf_get_linked_section_vma (*(struct bfd_link_order **)a); | |
10730 | bpos = elf_get_linked_section_vma (*(struct bfd_link_order **)b); | |
10731 | if (apos < bpos) | |
10732 | return -1; | |
10733 | return apos > bpos; | |
10734 | } | |
10735 | ||
10736 | ||
10737 | /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same | |
10738 | order as their linked sections. Returns false if this could not be done | |
10739 | because an output section includes both ordered and unordered | |
10740 | sections. Ideally we'd do this in the linker proper. */ | |
10741 | ||
10742 | static bfd_boolean | |
10743 | elf_fixup_link_order (bfd *abfd, asection *o) | |
10744 | { | |
10745 | int seen_linkorder; | |
10746 | int seen_other; | |
10747 | int n; | |
10748 | struct bfd_link_order *p; | |
10749 | bfd *sub; | |
10750 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
b761a207 | 10751 | unsigned elfsec; |
0b52efa6 | 10752 | struct bfd_link_order **sections; |
d33cdfe3 | 10753 | asection *s, *other_sec, *linkorder_sec; |
0b52efa6 | 10754 | bfd_vma offset; |
3b36f7e6 | 10755 | |
d33cdfe3 L |
10756 | other_sec = NULL; |
10757 | linkorder_sec = NULL; | |
0b52efa6 PB |
10758 | seen_other = 0; |
10759 | seen_linkorder = 0; | |
8423293d | 10760 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 | 10761 | { |
d33cdfe3 | 10762 | if (p->type == bfd_indirect_link_order) |
0b52efa6 PB |
10763 | { |
10764 | s = p->u.indirect.section; | |
d33cdfe3 L |
10765 | sub = s->owner; |
10766 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
10767 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass | |
b761a207 BE |
10768 | && (elfsec = _bfd_elf_section_from_bfd_section (sub, s)) |
10769 | && elfsec < elf_numsections (sub) | |
4fbb74a6 AM |
10770 | && elf_elfsections (sub)[elfsec]->sh_flags & SHF_LINK_ORDER |
10771 | && elf_elfsections (sub)[elfsec]->sh_link < elf_numsections (sub)) | |
d33cdfe3 L |
10772 | { |
10773 | seen_linkorder++; | |
10774 | linkorder_sec = s; | |
10775 | } | |
0b52efa6 | 10776 | else |
d33cdfe3 L |
10777 | { |
10778 | seen_other++; | |
10779 | other_sec = s; | |
10780 | } | |
0b52efa6 PB |
10781 | } |
10782 | else | |
10783 | seen_other++; | |
d33cdfe3 L |
10784 | |
10785 | if (seen_other && seen_linkorder) | |
10786 | { | |
10787 | if (other_sec && linkorder_sec) | |
10788 | (*_bfd_error_handler) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"), | |
10789 | o, linkorder_sec, | |
10790 | linkorder_sec->owner, other_sec, | |
10791 | other_sec->owner); | |
10792 | else | |
10793 | (*_bfd_error_handler) (_("%A has both ordered and unordered sections"), | |
10794 | o); | |
10795 | bfd_set_error (bfd_error_bad_value); | |
10796 | return FALSE; | |
10797 | } | |
0b52efa6 PB |
10798 | } |
10799 | ||
10800 | if (!seen_linkorder) | |
10801 | return TRUE; | |
10802 | ||
0b52efa6 | 10803 | sections = (struct bfd_link_order **) |
14b1c01e AM |
10804 | bfd_malloc (seen_linkorder * sizeof (struct bfd_link_order *)); |
10805 | if (sections == NULL) | |
10806 | return FALSE; | |
0b52efa6 | 10807 | seen_linkorder = 0; |
3b36f7e6 | 10808 | |
8423293d | 10809 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 PB |
10810 | { |
10811 | sections[seen_linkorder++] = p; | |
10812 | } | |
10813 | /* Sort the input sections in the order of their linked section. */ | |
10814 | qsort (sections, seen_linkorder, sizeof (struct bfd_link_order *), | |
10815 | compare_link_order); | |
10816 | ||
10817 | /* Change the offsets of the sections. */ | |
10818 | offset = 0; | |
10819 | for (n = 0; n < seen_linkorder; n++) | |
10820 | { | |
10821 | s = sections[n]->u.indirect.section; | |
461686a3 | 10822 | offset &= ~(bfd_vma) 0 << s->alignment_power; |
0b52efa6 PB |
10823 | s->output_offset = offset; |
10824 | sections[n]->offset = offset; | |
5dabe785 | 10825 | /* FIXME: octets_per_byte. */ |
0b52efa6 PB |
10826 | offset += sections[n]->size; |
10827 | } | |
10828 | ||
4dd07732 | 10829 | free (sections); |
0b52efa6 PB |
10830 | return TRUE; |
10831 | } | |
10832 | ||
9f7c3e5e AM |
10833 | static void |
10834 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
10835 | { | |
10836 | asection *o; | |
10837 | ||
10838 | if (flinfo->symstrtab != NULL) | |
ef10c3ac | 10839 | _bfd_elf_strtab_free (flinfo->symstrtab); |
9f7c3e5e AM |
10840 | if (flinfo->contents != NULL) |
10841 | free (flinfo->contents); | |
10842 | if (flinfo->external_relocs != NULL) | |
10843 | free (flinfo->external_relocs); | |
10844 | if (flinfo->internal_relocs != NULL) | |
10845 | free (flinfo->internal_relocs); | |
10846 | if (flinfo->external_syms != NULL) | |
10847 | free (flinfo->external_syms); | |
10848 | if (flinfo->locsym_shndx != NULL) | |
10849 | free (flinfo->locsym_shndx); | |
10850 | if (flinfo->internal_syms != NULL) | |
10851 | free (flinfo->internal_syms); | |
10852 | if (flinfo->indices != NULL) | |
10853 | free (flinfo->indices); | |
10854 | if (flinfo->sections != NULL) | |
10855 | free (flinfo->sections); | |
9f7c3e5e AM |
10856 | if (flinfo->symshndxbuf != NULL) |
10857 | free (flinfo->symshndxbuf); | |
10858 | for (o = obfd->sections; o != NULL; o = o->next) | |
10859 | { | |
10860 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
10861 | if ((o->flags & SEC_RELOC) != 0 && esdo->rel.hashes != NULL) | |
10862 | free (esdo->rel.hashes); | |
10863 | if ((o->flags & SEC_RELOC) != 0 && esdo->rela.hashes != NULL) | |
10864 | free (esdo->rela.hashes); | |
10865 | } | |
10866 | } | |
0b52efa6 | 10867 | |
c152c796 AM |
10868 | /* Do the final step of an ELF link. */ |
10869 | ||
10870 | bfd_boolean | |
10871 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) | |
10872 | { | |
10873 | bfd_boolean dynamic; | |
10874 | bfd_boolean emit_relocs; | |
10875 | bfd *dynobj; | |
8b127cbc | 10876 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
10877 | asection *o; |
10878 | struct bfd_link_order *p; | |
10879 | bfd *sub; | |
c152c796 AM |
10880 | bfd_size_type max_contents_size; |
10881 | bfd_size_type max_external_reloc_size; | |
10882 | bfd_size_type max_internal_reloc_count; | |
10883 | bfd_size_type max_sym_count; | |
10884 | bfd_size_type max_sym_shndx_count; | |
c152c796 AM |
10885 | Elf_Internal_Sym elfsym; |
10886 | unsigned int i; | |
10887 | Elf_Internal_Shdr *symtab_hdr; | |
10888 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
c152c796 AM |
10889 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
10890 | struct elf_outext_info eoinfo; | |
10891 | bfd_boolean merged; | |
10892 | size_t relativecount = 0; | |
10893 | asection *reldyn = 0; | |
10894 | bfd_size_type amt; | |
104d59d1 JM |
10895 | asection *attr_section = NULL; |
10896 | bfd_vma attr_size = 0; | |
10897 | const char *std_attrs_section; | |
c152c796 AM |
10898 | |
10899 | if (! is_elf_hash_table (info->hash)) | |
10900 | return FALSE; | |
10901 | ||
0e1862bb | 10902 | if (bfd_link_pic (info)) |
c152c796 AM |
10903 | abfd->flags |= DYNAMIC; |
10904 | ||
10905 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
10906 | dynobj = elf_hash_table (info)->dynobj; | |
10907 | ||
0e1862bb | 10908 | emit_relocs = (bfd_link_relocatable (info) |
a4676736 | 10909 | || info->emitrelocations); |
c152c796 | 10910 | |
8b127cbc AM |
10911 | flinfo.info = info; |
10912 | flinfo.output_bfd = abfd; | |
ef10c3ac | 10913 | flinfo.symstrtab = _bfd_elf_strtab_init (); |
8b127cbc | 10914 | if (flinfo.symstrtab == NULL) |
c152c796 AM |
10915 | return FALSE; |
10916 | ||
10917 | if (! dynamic) | |
10918 | { | |
8b127cbc AM |
10919 | flinfo.hash_sec = NULL; |
10920 | flinfo.symver_sec = NULL; | |
c152c796 AM |
10921 | } |
10922 | else | |
10923 | { | |
3d4d4302 | 10924 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); |
202e2356 | 10925 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 10926 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
10927 | /* Note that it is OK if symver_sec is NULL. */ |
10928 | } | |
10929 | ||
8b127cbc AM |
10930 | flinfo.contents = NULL; |
10931 | flinfo.external_relocs = NULL; | |
10932 | flinfo.internal_relocs = NULL; | |
10933 | flinfo.external_syms = NULL; | |
10934 | flinfo.locsym_shndx = NULL; | |
10935 | flinfo.internal_syms = NULL; | |
10936 | flinfo.indices = NULL; | |
10937 | flinfo.sections = NULL; | |
8b127cbc | 10938 | flinfo.symshndxbuf = NULL; |
ffbc01cc | 10939 | flinfo.filesym_count = 0; |
c152c796 | 10940 | |
104d59d1 JM |
10941 | /* The object attributes have been merged. Remove the input |
10942 | sections from the link, and set the contents of the output | |
10943 | secton. */ | |
10944 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; | |
10945 | for (o = abfd->sections; o != NULL; o = o->next) | |
10946 | { | |
10947 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) | |
10948 | || strcmp (o->name, ".gnu.attributes") == 0) | |
10949 | { | |
10950 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
10951 | { | |
10952 | asection *input_section; | |
10953 | ||
10954 | if (p->type != bfd_indirect_link_order) | |
10955 | continue; | |
10956 | input_section = p->u.indirect.section; | |
10957 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
10958 | elf_link_input_bfd ignores this section. */ | |
10959 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
10960 | } | |
a0c8462f | 10961 | |
104d59d1 JM |
10962 | attr_size = bfd_elf_obj_attr_size (abfd); |
10963 | if (attr_size) | |
10964 | { | |
10965 | bfd_set_section_size (abfd, o, attr_size); | |
10966 | attr_section = o; | |
10967 | /* Skip this section later on. */ | |
10968 | o->map_head.link_order = NULL; | |
10969 | } | |
10970 | else | |
10971 | o->flags |= SEC_EXCLUDE; | |
10972 | } | |
10973 | } | |
10974 | ||
c152c796 AM |
10975 | /* Count up the number of relocations we will output for each output |
10976 | section, so that we know the sizes of the reloc sections. We | |
10977 | also figure out some maximum sizes. */ | |
10978 | max_contents_size = 0; | |
10979 | max_external_reloc_size = 0; | |
10980 | max_internal_reloc_count = 0; | |
10981 | max_sym_count = 0; | |
10982 | max_sym_shndx_count = 0; | |
10983 | merged = FALSE; | |
10984 | for (o = abfd->sections; o != NULL; o = o->next) | |
10985 | { | |
10986 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
10987 | o->reloc_count = 0; | |
10988 | ||
8423293d | 10989 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
10990 | { |
10991 | unsigned int reloc_count = 0; | |
10992 | struct bfd_elf_section_data *esdi = NULL; | |
c152c796 AM |
10993 | |
10994 | if (p->type == bfd_section_reloc_link_order | |
10995 | || p->type == bfd_symbol_reloc_link_order) | |
10996 | reloc_count = 1; | |
10997 | else if (p->type == bfd_indirect_link_order) | |
10998 | { | |
10999 | asection *sec; | |
11000 | ||
11001 | sec = p->u.indirect.section; | |
11002 | esdi = elf_section_data (sec); | |
11003 | ||
11004 | /* Mark all sections which are to be included in the | |
11005 | link. This will normally be every section. We need | |
11006 | to do this so that we can identify any sections which | |
11007 | the linker has decided to not include. */ | |
11008 | sec->linker_mark = TRUE; | |
11009 | ||
11010 | if (sec->flags & SEC_MERGE) | |
11011 | merged = TRUE; | |
11012 | ||
aed64b35 L |
11013 | if (esdo->this_hdr.sh_type == SHT_REL |
11014 | || esdo->this_hdr.sh_type == SHT_RELA) | |
11015 | /* Some backends use reloc_count in relocation sections | |
11016 | to count particular types of relocs. Of course, | |
11017 | reloc sections themselves can't have relocations. */ | |
11018 | reloc_count = 0; | |
0e1862bb | 11019 | else if (emit_relocs) |
c152c796 AM |
11020 | reloc_count = sec->reloc_count; |
11021 | else if (bed->elf_backend_count_relocs) | |
58217f29 | 11022 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); |
c152c796 | 11023 | |
eea6121a AM |
11024 | if (sec->rawsize > max_contents_size) |
11025 | max_contents_size = sec->rawsize; | |
11026 | if (sec->size > max_contents_size) | |
11027 | max_contents_size = sec->size; | |
c152c796 AM |
11028 | |
11029 | /* We are interested in just local symbols, not all | |
11030 | symbols. */ | |
11031 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
11032 | && (sec->owner->flags & DYNAMIC) == 0) | |
11033 | { | |
11034 | size_t sym_count; | |
11035 | ||
11036 | if (elf_bad_symtab (sec->owner)) | |
11037 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
11038 | / bed->s->sizeof_sym); | |
11039 | else | |
11040 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
11041 | ||
11042 | if (sym_count > max_sym_count) | |
11043 | max_sym_count = sym_count; | |
11044 | ||
11045 | if (sym_count > max_sym_shndx_count | |
6a40cf0c | 11046 | && elf_symtab_shndx_list (sec->owner) != NULL) |
c152c796 AM |
11047 | max_sym_shndx_count = sym_count; |
11048 | ||
11049 | if ((sec->flags & SEC_RELOC) != 0) | |
11050 | { | |
d4730f92 | 11051 | size_t ext_size = 0; |
c152c796 | 11052 | |
d4730f92 BS |
11053 | if (esdi->rel.hdr != NULL) |
11054 | ext_size = esdi->rel.hdr->sh_size; | |
11055 | if (esdi->rela.hdr != NULL) | |
11056 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 11057 | |
c152c796 AM |
11058 | if (ext_size > max_external_reloc_size) |
11059 | max_external_reloc_size = ext_size; | |
11060 | if (sec->reloc_count > max_internal_reloc_count) | |
11061 | max_internal_reloc_count = sec->reloc_count; | |
11062 | } | |
11063 | } | |
11064 | } | |
11065 | ||
11066 | if (reloc_count == 0) | |
11067 | continue; | |
11068 | ||
11069 | o->reloc_count += reloc_count; | |
11070 | ||
0e1862bb | 11071 | if (p->type == bfd_indirect_link_order && emit_relocs) |
c152c796 | 11072 | { |
d4730f92 BS |
11073 | if (esdi->rel.hdr) |
11074 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); | |
11075 | if (esdi->rela.hdr) | |
11076 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); | |
11077 | } | |
11078 | else | |
11079 | { | |
11080 | if (o->use_rela_p) | |
11081 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 11082 | else |
d4730f92 | 11083 | esdo->rel.count += reloc_count; |
c152c796 | 11084 | } |
c152c796 AM |
11085 | } |
11086 | ||
11087 | if (o->reloc_count > 0) | |
11088 | o->flags |= SEC_RELOC; | |
11089 | else | |
11090 | { | |
11091 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
11092 | set it (this is probably a bug) and if it is set | |
11093 | assign_section_numbers will create a reloc section. */ | |
11094 | o->flags &=~ SEC_RELOC; | |
11095 | } | |
11096 | ||
11097 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
11098 | zero. This is done in elf_fake_sections as well, but forcing | |
11099 | the VMA to 0 here will ensure that relocs against these | |
11100 | sections are handled correctly. */ | |
11101 | if ((o->flags & SEC_ALLOC) == 0 | |
11102 | && ! o->user_set_vma) | |
11103 | o->vma = 0; | |
11104 | } | |
11105 | ||
0e1862bb | 11106 | if (! bfd_link_relocatable (info) && merged) |
c152c796 AM |
11107 | elf_link_hash_traverse (elf_hash_table (info), |
11108 | _bfd_elf_link_sec_merge_syms, abfd); | |
11109 | ||
11110 | /* Figure out the file positions for everything but the symbol table | |
11111 | and the relocs. We set symcount to force assign_section_numbers | |
11112 | to create a symbol table. */ | |
8539e4e8 | 11113 | bfd_get_symcount (abfd) = info->strip != strip_all || emit_relocs; |
c152c796 AM |
11114 | BFD_ASSERT (! abfd->output_has_begun); |
11115 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
11116 | goto error_return; | |
11117 | ||
ee75fd95 | 11118 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
11119 | for (o = abfd->sections; o != NULL; o = o->next) |
11120 | { | |
d4730f92 | 11121 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
11122 | if ((o->flags & SEC_RELOC) != 0) |
11123 | { | |
d4730f92 BS |
11124 | if (esdo->rel.hdr |
11125 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) | |
c152c796 AM |
11126 | goto error_return; |
11127 | ||
d4730f92 BS |
11128 | if (esdo->rela.hdr |
11129 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) | |
c152c796 AM |
11130 | goto error_return; |
11131 | } | |
11132 | ||
11133 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
11134 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
11135 | esdo->rel.count = 0; |
11136 | esdo->rela.count = 0; | |
0ce398f1 L |
11137 | |
11138 | if (esdo->this_hdr.sh_offset == (file_ptr) -1) | |
11139 | { | |
11140 | /* Cache the section contents so that they can be compressed | |
11141 | later. Use bfd_malloc since it will be freed by | |
11142 | bfd_compress_section_contents. */ | |
11143 | unsigned char *contents = esdo->this_hdr.contents; | |
11144 | if ((o->flags & SEC_ELF_COMPRESS) == 0 || contents != NULL) | |
11145 | abort (); | |
11146 | contents | |
11147 | = (unsigned char *) bfd_malloc (esdo->this_hdr.sh_size); | |
11148 | if (contents == NULL) | |
11149 | goto error_return; | |
11150 | esdo->this_hdr.contents = contents; | |
11151 | } | |
c152c796 AM |
11152 | } |
11153 | ||
c152c796 | 11154 | /* We have now assigned file positions for all the sections except |
a485e98e AM |
11155 | .symtab, .strtab, and non-loaded reloc sections. We start the |
11156 | .symtab section at the current file position, and write directly | |
11157 | to it. We build the .strtab section in memory. */ | |
c152c796 AM |
11158 | bfd_get_symcount (abfd) = 0; |
11159 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11160 | /* sh_name is set in prep_headers. */ | |
11161 | symtab_hdr->sh_type = SHT_SYMTAB; | |
11162 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
11163 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
11164 | /* sh_link is set in assign_section_numbers. */ | |
11165 | /* sh_info is set below. */ | |
11166 | /* sh_offset is set just below. */ | |
72de5009 | 11167 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 11168 | |
ef10c3ac L |
11169 | if (max_sym_count < 20) |
11170 | max_sym_count = 20; | |
11171 | elf_hash_table (info)->strtabsize = max_sym_count; | |
11172 | amt = max_sym_count * sizeof (struct elf_sym_strtab); | |
11173 | elf_hash_table (info)->strtab | |
11174 | = (struct elf_sym_strtab *) bfd_malloc (amt); | |
11175 | if (elf_hash_table (info)->strtab == NULL) | |
c152c796 | 11176 | goto error_return; |
ef10c3ac L |
11177 | /* The real buffer will be allocated in elf_link_swap_symbols_out. */ |
11178 | flinfo.symshndxbuf | |
11179 | = (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF) | |
11180 | ? (Elf_External_Sym_Shndx *) -1 : NULL); | |
c152c796 | 11181 | |
8539e4e8 | 11182 | if (info->strip != strip_all || emit_relocs) |
c152c796 | 11183 | { |
8539e4e8 AM |
11184 | file_ptr off = elf_next_file_pos (abfd); |
11185 | ||
11186 | _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); | |
11187 | ||
11188 | /* Note that at this point elf_next_file_pos (abfd) is | |
11189 | incorrect. We do not yet know the size of the .symtab section. | |
11190 | We correct next_file_pos below, after we do know the size. */ | |
11191 | ||
11192 | /* Start writing out the symbol table. The first symbol is always a | |
11193 | dummy symbol. */ | |
c152c796 AM |
11194 | elfsym.st_value = 0; |
11195 | elfsym.st_size = 0; | |
11196 | elfsym.st_info = 0; | |
11197 | elfsym.st_other = 0; | |
11198 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 11199 | elfsym.st_target_internal = 0; |
ef10c3ac L |
11200 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, |
11201 | bfd_und_section_ptr, NULL) != 1) | |
c152c796 | 11202 | goto error_return; |
c152c796 | 11203 | |
8539e4e8 AM |
11204 | /* Output a symbol for each section. We output these even if we are |
11205 | discarding local symbols, since they are used for relocs. These | |
11206 | symbols have no names. We store the index of each one in the | |
11207 | index field of the section, so that we can find it again when | |
11208 | outputting relocs. */ | |
11209 | ||
c152c796 AM |
11210 | elfsym.st_size = 0; |
11211 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11212 | elfsym.st_other = 0; | |
f0b5bb34 | 11213 | elfsym.st_value = 0; |
35fc36a8 | 11214 | elfsym.st_target_internal = 0; |
c152c796 AM |
11215 | for (i = 1; i < elf_numsections (abfd); i++) |
11216 | { | |
11217 | o = bfd_section_from_elf_index (abfd, i); | |
11218 | if (o != NULL) | |
f0b5bb34 AM |
11219 | { |
11220 | o->target_index = bfd_get_symcount (abfd); | |
11221 | elfsym.st_shndx = i; | |
0e1862bb | 11222 | if (!bfd_link_relocatable (info)) |
f0b5bb34 | 11223 | elfsym.st_value = o->vma; |
ef10c3ac L |
11224 | if (elf_link_output_symstrtab (&flinfo, NULL, &elfsym, o, |
11225 | NULL) != 1) | |
f0b5bb34 AM |
11226 | goto error_return; |
11227 | } | |
c152c796 AM |
11228 | } |
11229 | } | |
11230 | ||
11231 | /* Allocate some memory to hold information read in from the input | |
11232 | files. */ | |
11233 | if (max_contents_size != 0) | |
11234 | { | |
8b127cbc AM |
11235 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
11236 | if (flinfo.contents == NULL) | |
c152c796 AM |
11237 | goto error_return; |
11238 | } | |
11239 | ||
11240 | if (max_external_reloc_size != 0) | |
11241 | { | |
8b127cbc AM |
11242 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
11243 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
11244 | goto error_return; |
11245 | } | |
11246 | ||
11247 | if (max_internal_reloc_count != 0) | |
11248 | { | |
11249 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
11250 | amt *= sizeof (Elf_Internal_Rela); | |
8b127cbc AM |
11251 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
11252 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
11253 | goto error_return; |
11254 | } | |
11255 | ||
11256 | if (max_sym_count != 0) | |
11257 | { | |
11258 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
11259 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
11260 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
11261 | goto error_return; |
11262 | ||
11263 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
11264 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
11265 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
11266 | goto error_return; |
11267 | ||
11268 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
11269 | flinfo.indices = (long int *) bfd_malloc (amt); |
11270 | if (flinfo.indices == NULL) | |
c152c796 AM |
11271 | goto error_return; |
11272 | ||
11273 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
11274 | flinfo.sections = (asection **) bfd_malloc (amt); |
11275 | if (flinfo.sections == NULL) | |
c152c796 AM |
11276 | goto error_return; |
11277 | } | |
11278 | ||
11279 | if (max_sym_shndx_count != 0) | |
11280 | { | |
11281 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
11282 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
11283 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
11284 | goto error_return; |
11285 | } | |
11286 | ||
11287 | if (elf_hash_table (info)->tls_sec) | |
11288 | { | |
11289 | bfd_vma base, end = 0; | |
11290 | asection *sec; | |
11291 | ||
11292 | for (sec = elf_hash_table (info)->tls_sec; | |
11293 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
11294 | sec = sec->next) | |
11295 | { | |
3a800eb9 | 11296 | bfd_size_type size = sec->size; |
c152c796 | 11297 | |
3a800eb9 AM |
11298 | if (size == 0 |
11299 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 11300 | { |
91d6fa6a NC |
11301 | struct bfd_link_order *ord = sec->map_tail.link_order; |
11302 | ||
11303 | if (ord != NULL) | |
11304 | size = ord->offset + ord->size; | |
c152c796 AM |
11305 | } |
11306 | end = sec->vma + size; | |
11307 | } | |
11308 | base = elf_hash_table (info)->tls_sec->vma; | |
7dc98aea RO |
11309 | /* Only align end of TLS section if static TLS doesn't have special |
11310 | alignment requirements. */ | |
11311 | if (bed->static_tls_alignment == 1) | |
11312 | end = align_power (end, | |
11313 | elf_hash_table (info)->tls_sec->alignment_power); | |
c152c796 AM |
11314 | elf_hash_table (info)->tls_size = end - base; |
11315 | } | |
11316 | ||
0b52efa6 PB |
11317 | /* Reorder SHF_LINK_ORDER sections. */ |
11318 | for (o = abfd->sections; o != NULL; o = o->next) | |
11319 | { | |
11320 | if (!elf_fixup_link_order (abfd, o)) | |
11321 | return FALSE; | |
11322 | } | |
11323 | ||
2f0c68f2 CM |
11324 | if (!_bfd_elf_fixup_eh_frame_hdr (info)) |
11325 | return FALSE; | |
11326 | ||
c152c796 AM |
11327 | /* Since ELF permits relocations to be against local symbols, we |
11328 | must have the local symbols available when we do the relocations. | |
11329 | Since we would rather only read the local symbols once, and we | |
11330 | would rather not keep them in memory, we handle all the | |
11331 | relocations for a single input file at the same time. | |
11332 | ||
11333 | Unfortunately, there is no way to know the total number of local | |
11334 | symbols until we have seen all of them, and the local symbol | |
11335 | indices precede the global symbol indices. This means that when | |
11336 | we are generating relocatable output, and we see a reloc against | |
11337 | a global symbol, we can not know the symbol index until we have | |
11338 | finished examining all the local symbols to see which ones we are | |
11339 | going to output. To deal with this, we keep the relocations in | |
11340 | memory, and don't output them until the end of the link. This is | |
11341 | an unfortunate waste of memory, but I don't see a good way around | |
11342 | it. Fortunately, it only happens when performing a relocatable | |
11343 | link, which is not the common case. FIXME: If keep_memory is set | |
11344 | we could write the relocs out and then read them again; I don't | |
11345 | know how bad the memory loss will be. */ | |
11346 | ||
c72f2fb2 | 11347 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
11348 | sub->output_has_begun = FALSE; |
11349 | for (o = abfd->sections; o != NULL; o = o->next) | |
11350 | { | |
8423293d | 11351 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
11352 | { |
11353 | if (p->type == bfd_indirect_link_order | |
11354 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
11355 | == bfd_target_elf_flavour) | |
11356 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
11357 | { | |
11358 | if (! sub->output_has_begun) | |
11359 | { | |
8b127cbc | 11360 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 AM |
11361 | goto error_return; |
11362 | sub->output_has_begun = TRUE; | |
11363 | } | |
11364 | } | |
11365 | else if (p->type == bfd_section_reloc_link_order | |
11366 | || p->type == bfd_symbol_reloc_link_order) | |
11367 | { | |
11368 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
11369 | goto error_return; | |
11370 | } | |
11371 | else | |
11372 | { | |
11373 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
11374 | { |
11375 | if (p->type == bfd_indirect_link_order | |
11376 | && (bfd_get_flavour (sub) | |
11377 | == bfd_target_elf_flavour) | |
11378 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
11379 | != bed->s->elfclass)) | |
11380 | { | |
11381 | const char *iclass, *oclass; | |
11382 | ||
11383 | if (bed->s->elfclass == ELFCLASS64) | |
11384 | { | |
11385 | iclass = "ELFCLASS32"; | |
11386 | oclass = "ELFCLASS64"; | |
11387 | } | |
11388 | else | |
11389 | { | |
11390 | iclass = "ELFCLASS64"; | |
11391 | oclass = "ELFCLASS32"; | |
11392 | } | |
11393 | ||
11394 | bfd_set_error (bfd_error_wrong_format); | |
11395 | (*_bfd_error_handler) | |
11396 | (_("%B: file class %s incompatible with %s"), | |
11397 | sub, iclass, oclass); | |
11398 | } | |
11399 | ||
11400 | goto error_return; | |
11401 | } | |
c152c796 AM |
11402 | } |
11403 | } | |
11404 | } | |
11405 | ||
c0f00686 L |
11406 | /* Free symbol buffer if needed. */ |
11407 | if (!info->reduce_memory_overheads) | |
11408 | { | |
c72f2fb2 | 11409 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
3fcd97f1 JJ |
11410 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour |
11411 | && elf_tdata (sub)->symbuf) | |
c0f00686 L |
11412 | { |
11413 | free (elf_tdata (sub)->symbuf); | |
11414 | elf_tdata (sub)->symbuf = NULL; | |
11415 | } | |
11416 | } | |
11417 | ||
c152c796 AM |
11418 | /* Output any global symbols that got converted to local in a |
11419 | version script or due to symbol visibility. We do this in a | |
11420 | separate step since ELF requires all local symbols to appear | |
11421 | prior to any global symbols. FIXME: We should only do this if | |
11422 | some global symbols were, in fact, converted to become local. | |
11423 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
11424 | eoinfo.failed = FALSE; | |
8b127cbc | 11425 | eoinfo.flinfo = &flinfo; |
c152c796 | 11426 | eoinfo.localsyms = TRUE; |
34a79995 | 11427 | eoinfo.file_sym_done = FALSE; |
7686d77d | 11428 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11429 | if (eoinfo.failed) |
11430 | return FALSE; | |
11431 | ||
4e617b1e PB |
11432 | /* If backend needs to output some local symbols not present in the hash |
11433 | table, do it now. */ | |
8539e4e8 AM |
11434 | if (bed->elf_backend_output_arch_local_syms |
11435 | && (info->strip != strip_all || emit_relocs)) | |
4e617b1e | 11436 | { |
6e0b88f1 | 11437 | typedef int (*out_sym_func) |
4e617b1e PB |
11438 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11439 | struct elf_link_hash_entry *); | |
11440 | ||
11441 | if (! ((*bed->elf_backend_output_arch_local_syms) | |
ef10c3ac L |
11442 | (abfd, info, &flinfo, |
11443 | (out_sym_func) elf_link_output_symstrtab))) | |
4e617b1e PB |
11444 | return FALSE; |
11445 | } | |
11446 | ||
c152c796 AM |
11447 | /* That wrote out all the local symbols. Finish up the symbol table |
11448 | with the global symbols. Even if we want to strip everything we | |
11449 | can, we still need to deal with those global symbols that got | |
11450 | converted to local in a version script. */ | |
11451 | ||
11452 | /* The sh_info field records the index of the first non local symbol. */ | |
11453 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
11454 | ||
11455 | if (dynamic | |
cae1fbbb L |
11456 | && elf_hash_table (info)->dynsym != NULL |
11457 | && (elf_hash_table (info)->dynsym->output_section | |
11458 | != bfd_abs_section_ptr)) | |
c152c796 AM |
11459 | { |
11460 | Elf_Internal_Sym sym; | |
cae1fbbb | 11461 | bfd_byte *dynsym = elf_hash_table (info)->dynsym->contents; |
c152c796 AM |
11462 | long last_local = 0; |
11463 | ||
11464 | /* Write out the section symbols for the output sections. */ | |
0e1862bb L |
11465 | if (bfd_link_pic (info) |
11466 | || elf_hash_table (info)->is_relocatable_executable) | |
c152c796 AM |
11467 | { |
11468 | asection *s; | |
11469 | ||
11470 | sym.st_size = 0; | |
11471 | sym.st_name = 0; | |
11472 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11473 | sym.st_other = 0; | |
35fc36a8 | 11474 | sym.st_target_internal = 0; |
c152c796 AM |
11475 | |
11476 | for (s = abfd->sections; s != NULL; s = s->next) | |
11477 | { | |
11478 | int indx; | |
11479 | bfd_byte *dest; | |
11480 | long dynindx; | |
11481 | ||
c152c796 | 11482 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
11483 | if (dynindx <= 0) |
11484 | continue; | |
11485 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
11486 | BFD_ASSERT (indx > 0); |
11487 | sym.st_shndx = indx; | |
c0d5a53d L |
11488 | if (! check_dynsym (abfd, &sym)) |
11489 | return FALSE; | |
c152c796 AM |
11490 | sym.st_value = s->vma; |
11491 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
8c37241b JJ |
11492 | if (last_local < dynindx) |
11493 | last_local = dynindx; | |
c152c796 AM |
11494 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); |
11495 | } | |
c152c796 AM |
11496 | } |
11497 | ||
11498 | /* Write out the local dynsyms. */ | |
11499 | if (elf_hash_table (info)->dynlocal) | |
11500 | { | |
11501 | struct elf_link_local_dynamic_entry *e; | |
11502 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
11503 | { | |
11504 | asection *s; | |
11505 | bfd_byte *dest; | |
11506 | ||
935bd1e0 | 11507 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
11508 | Note that we saved a word of storage and overwrote |
11509 | the original st_name with the dynstr_index. */ | |
11510 | sym = e->isym; | |
935bd1e0 | 11511 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
c152c796 | 11512 | |
cb33740c AM |
11513 | s = bfd_section_from_elf_index (e->input_bfd, |
11514 | e->isym.st_shndx); | |
11515 | if (s != NULL) | |
c152c796 | 11516 | { |
c152c796 AM |
11517 | sym.st_shndx = |
11518 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d L |
11519 | if (! check_dynsym (abfd, &sym)) |
11520 | return FALSE; | |
c152c796 AM |
11521 | sym.st_value = (s->output_section->vma |
11522 | + s->output_offset | |
11523 | + e->isym.st_value); | |
11524 | } | |
11525 | ||
11526 | if (last_local < e->dynindx) | |
11527 | last_local = e->dynindx; | |
11528 | ||
11529 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; | |
11530 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
11531 | } | |
11532 | } | |
11533 | ||
cae1fbbb | 11534 | elf_section_data (elf_hash_table (info)->dynsym->output_section)->this_hdr.sh_info = |
c152c796 AM |
11535 | last_local + 1; |
11536 | } | |
11537 | ||
11538 | /* We get the global symbols from the hash table. */ | |
11539 | eoinfo.failed = FALSE; | |
11540 | eoinfo.localsyms = FALSE; | |
8b127cbc | 11541 | eoinfo.flinfo = &flinfo; |
7686d77d | 11542 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11543 | if (eoinfo.failed) |
11544 | return FALSE; | |
11545 | ||
11546 | /* If backend needs to output some symbols not present in the hash | |
11547 | table, do it now. */ | |
8539e4e8 AM |
11548 | if (bed->elf_backend_output_arch_syms |
11549 | && (info->strip != strip_all || emit_relocs)) | |
c152c796 | 11550 | { |
6e0b88f1 | 11551 | typedef int (*out_sym_func) |
c152c796 AM |
11552 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11553 | struct elf_link_hash_entry *); | |
11554 | ||
11555 | if (! ((*bed->elf_backend_output_arch_syms) | |
ef10c3ac L |
11556 | (abfd, info, &flinfo, |
11557 | (out_sym_func) elf_link_output_symstrtab))) | |
c152c796 AM |
11558 | return FALSE; |
11559 | } | |
11560 | ||
ef10c3ac L |
11561 | /* Finalize the .strtab section. */ |
11562 | _bfd_elf_strtab_finalize (flinfo.symstrtab); | |
11563 | ||
11564 | /* Swap out the .strtab section. */ | |
11565 | if (!elf_link_swap_symbols_out (&flinfo)) | |
c152c796 AM |
11566 | return FALSE; |
11567 | ||
11568 | /* Now we know the size of the symtab section. */ | |
c152c796 AM |
11569 | if (bfd_get_symcount (abfd) > 0) |
11570 | { | |
ee3b52e9 L |
11571 | /* Finish up and write out the symbol string table (.strtab) |
11572 | section. */ | |
11573 | Elf_Internal_Shdr *symstrtab_hdr; | |
8539e4e8 AM |
11574 | file_ptr off = symtab_hdr->sh_offset + symtab_hdr->sh_size; |
11575 | ||
6a40cf0c NC |
11576 | symtab_shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
11577 | if (symtab_shndx_hdr != NULL && symtab_shndx_hdr->sh_name != 0) | |
8539e4e8 AM |
11578 | { |
11579 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
11580 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
11581 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
11582 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
11583 | symtab_shndx_hdr->sh_size = amt; | |
11584 | ||
11585 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
11586 | off, TRUE); | |
11587 | ||
11588 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
11589 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) | |
11590 | return FALSE; | |
11591 | } | |
ee3b52e9 L |
11592 | |
11593 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
11594 | /* sh_name was set in prep_headers. */ | |
11595 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
11596 | symstrtab_hdr->sh_flags = 0; | |
11597 | symstrtab_hdr->sh_addr = 0; | |
ef10c3ac | 11598 | symstrtab_hdr->sh_size = _bfd_elf_strtab_size (flinfo.symstrtab); |
ee3b52e9 L |
11599 | symstrtab_hdr->sh_entsize = 0; |
11600 | symstrtab_hdr->sh_link = 0; | |
11601 | symstrtab_hdr->sh_info = 0; | |
11602 | /* sh_offset is set just below. */ | |
11603 | symstrtab_hdr->sh_addralign = 1; | |
11604 | ||
11605 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, | |
11606 | off, TRUE); | |
11607 | elf_next_file_pos (abfd) = off; | |
11608 | ||
c152c796 | 11609 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 |
ef10c3ac | 11610 | || ! _bfd_elf_strtab_emit (abfd, flinfo.symstrtab)) |
c152c796 AM |
11611 | return FALSE; |
11612 | } | |
11613 | ||
11614 | /* Adjust the relocs to have the correct symbol indices. */ | |
11615 | for (o = abfd->sections; o != NULL; o = o->next) | |
11616 | { | |
d4730f92 | 11617 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
28dbcedc | 11618 | bfd_boolean sort; |
c152c796 AM |
11619 | if ((o->flags & SEC_RELOC) == 0) |
11620 | continue; | |
11621 | ||
28dbcedc | 11622 | sort = bed->sort_relocs_p == NULL || (*bed->sort_relocs_p) (o); |
bca6d0e3 AM |
11623 | if (esdo->rel.hdr != NULL |
11624 | && !elf_link_adjust_relocs (abfd, &esdo->rel, sort)) | |
11625 | return FALSE; | |
11626 | if (esdo->rela.hdr != NULL | |
11627 | && !elf_link_adjust_relocs (abfd, &esdo->rela, sort)) | |
11628 | return FALSE; | |
c152c796 AM |
11629 | |
11630 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
11631 | trying to swap the relocs out itself. */ | |
11632 | o->reloc_count = 0; | |
11633 | } | |
11634 | ||
11635 | if (dynamic && info->combreloc && dynobj != NULL) | |
11636 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
11637 | ||
11638 | /* If we are linking against a dynamic object, or generating a | |
11639 | shared library, finish up the dynamic linking information. */ | |
11640 | if (dynamic) | |
11641 | { | |
11642 | bfd_byte *dyncon, *dynconend; | |
11643 | ||
11644 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 11645 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
11646 | BFD_ASSERT (o != NULL); |
11647 | ||
11648 | dyncon = o->contents; | |
eea6121a | 11649 | dynconend = o->contents + o->size; |
c152c796 AM |
11650 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
11651 | { | |
11652 | Elf_Internal_Dyn dyn; | |
11653 | const char *name; | |
11654 | unsigned int type; | |
11655 | ||
11656 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11657 | ||
11658 | switch (dyn.d_tag) | |
11659 | { | |
11660 | default: | |
11661 | continue; | |
11662 | case DT_NULL: | |
11663 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
11664 | { | |
11665 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
11666 | { | |
11667 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
11668 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
11669 | default: continue; | |
11670 | } | |
11671 | dyn.d_un.d_val = relativecount; | |
11672 | relativecount = 0; | |
11673 | break; | |
11674 | } | |
11675 | continue; | |
11676 | ||
11677 | case DT_INIT: | |
11678 | name = info->init_function; | |
11679 | goto get_sym; | |
11680 | case DT_FINI: | |
11681 | name = info->fini_function; | |
11682 | get_sym: | |
11683 | { | |
11684 | struct elf_link_hash_entry *h; | |
11685 | ||
11686 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
11687 | FALSE, FALSE, TRUE); | |
11688 | if (h != NULL | |
11689 | && (h->root.type == bfd_link_hash_defined | |
11690 | || h->root.type == bfd_link_hash_defweak)) | |
11691 | { | |
bef26483 | 11692 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
11693 | o = h->root.u.def.section; |
11694 | if (o->output_section != NULL) | |
bef26483 | 11695 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
11696 | + o->output_offset); |
11697 | else | |
11698 | { | |
11699 | /* The symbol is imported from another shared | |
11700 | library and does not apply to this one. */ | |
bef26483 | 11701 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11702 | } |
11703 | break; | |
11704 | } | |
11705 | } | |
11706 | continue; | |
11707 | ||
11708 | case DT_PREINIT_ARRAYSZ: | |
11709 | name = ".preinit_array"; | |
11710 | goto get_size; | |
11711 | case DT_INIT_ARRAYSZ: | |
11712 | name = ".init_array"; | |
11713 | goto get_size; | |
11714 | case DT_FINI_ARRAYSZ: | |
11715 | name = ".fini_array"; | |
11716 | get_size: | |
11717 | o = bfd_get_section_by_name (abfd, name); | |
11718 | if (o == NULL) | |
11719 | { | |
11720 | (*_bfd_error_handler) | |
d003868e | 11721 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11722 | goto error_return; |
11723 | } | |
eea6121a | 11724 | if (o->size == 0) |
c152c796 AM |
11725 | (*_bfd_error_handler) |
11726 | (_("warning: %s section has zero size"), name); | |
eea6121a | 11727 | dyn.d_un.d_val = o->size; |
c152c796 AM |
11728 | break; |
11729 | ||
11730 | case DT_PREINIT_ARRAY: | |
11731 | name = ".preinit_array"; | |
11732 | goto get_vma; | |
11733 | case DT_INIT_ARRAY: | |
11734 | name = ".init_array"; | |
11735 | goto get_vma; | |
11736 | case DT_FINI_ARRAY: | |
11737 | name = ".fini_array"; | |
11738 | goto get_vma; | |
11739 | ||
11740 | case DT_HASH: | |
11741 | name = ".hash"; | |
11742 | goto get_vma; | |
fdc90cb4 JJ |
11743 | case DT_GNU_HASH: |
11744 | name = ".gnu.hash"; | |
11745 | goto get_vma; | |
c152c796 AM |
11746 | case DT_STRTAB: |
11747 | name = ".dynstr"; | |
11748 | goto get_vma; | |
11749 | case DT_SYMTAB: | |
11750 | name = ".dynsym"; | |
11751 | goto get_vma; | |
11752 | case DT_VERDEF: | |
11753 | name = ".gnu.version_d"; | |
11754 | goto get_vma; | |
11755 | case DT_VERNEED: | |
11756 | name = ".gnu.version_r"; | |
11757 | goto get_vma; | |
11758 | case DT_VERSYM: | |
11759 | name = ".gnu.version"; | |
11760 | get_vma: | |
11761 | o = bfd_get_section_by_name (abfd, name); | |
11762 | if (o == NULL) | |
11763 | { | |
11764 | (*_bfd_error_handler) | |
d003868e | 11765 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11766 | goto error_return; |
11767 | } | |
894891db NC |
11768 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
11769 | { | |
11770 | (*_bfd_error_handler) | |
11771 | (_("warning: section '%s' is being made into a note"), name); | |
11772 | bfd_set_error (bfd_error_nonrepresentable_section); | |
11773 | goto error_return; | |
11774 | } | |
c152c796 AM |
11775 | dyn.d_un.d_ptr = o->vma; |
11776 | break; | |
11777 | ||
11778 | case DT_REL: | |
11779 | case DT_RELA: | |
11780 | case DT_RELSZ: | |
11781 | case DT_RELASZ: | |
11782 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
11783 | type = SHT_REL; | |
11784 | else | |
11785 | type = SHT_RELA; | |
11786 | dyn.d_un.d_val = 0; | |
bef26483 | 11787 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11788 | for (i = 1; i < elf_numsections (abfd); i++) |
11789 | { | |
11790 | Elf_Internal_Shdr *hdr; | |
11791 | ||
11792 | hdr = elf_elfsections (abfd)[i]; | |
11793 | if (hdr->sh_type == type | |
11794 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
11795 | { | |
11796 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
11797 | dyn.d_un.d_val += hdr->sh_size; | |
11798 | else | |
11799 | { | |
bef26483 AM |
11800 | if (dyn.d_un.d_ptr == 0 |
11801 | || hdr->sh_addr < dyn.d_un.d_ptr) | |
11802 | dyn.d_un.d_ptr = hdr->sh_addr; | |
c152c796 AM |
11803 | } |
11804 | } | |
11805 | } | |
11806 | break; | |
11807 | } | |
11808 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
11809 | } | |
11810 | } | |
11811 | ||
11812 | /* If we have created any dynamic sections, then output them. */ | |
11813 | if (dynobj != NULL) | |
11814 | { | |
11815 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
11816 | goto error_return; | |
11817 | ||
943284cc | 11818 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
0e1862bb | 11819 | if (((info->warn_shared_textrel && bfd_link_pic (info)) |
be7b303d | 11820 | || info->error_textrel) |
3d4d4302 | 11821 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
11822 | { |
11823 | bfd_byte *dyncon, *dynconend; | |
11824 | ||
943284cc DJ |
11825 | dyncon = o->contents; |
11826 | dynconend = o->contents + o->size; | |
11827 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
11828 | { | |
11829 | Elf_Internal_Dyn dyn; | |
11830 | ||
11831 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11832 | ||
11833 | if (dyn.d_tag == DT_TEXTREL) | |
11834 | { | |
c192a133 AM |
11835 | if (info->error_textrel) |
11836 | info->callbacks->einfo | |
11837 | (_("%P%X: read-only segment has dynamic relocations.\n")); | |
11838 | else | |
11839 | info->callbacks->einfo | |
11840 | (_("%P: warning: creating a DT_TEXTREL in a shared object.\n")); | |
943284cc DJ |
11841 | break; |
11842 | } | |
11843 | } | |
11844 | } | |
11845 | ||
c152c796 AM |
11846 | for (o = dynobj->sections; o != NULL; o = o->next) |
11847 | { | |
11848 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 11849 | || o->size == 0 |
c152c796 AM |
11850 | || o->output_section == bfd_abs_section_ptr) |
11851 | continue; | |
11852 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
11853 | { | |
11854 | /* At this point, we are only interested in sections | |
11855 | created by _bfd_elf_link_create_dynamic_sections. */ | |
11856 | continue; | |
11857 | } | |
3722b82f AM |
11858 | if (elf_hash_table (info)->stab_info.stabstr == o) |
11859 | continue; | |
eea6121a AM |
11860 | if (elf_hash_table (info)->eh_info.hdr_sec == o) |
11861 | continue; | |
3d4d4302 | 11862 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 | 11863 | { |
5dabe785 | 11864 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
11865 | if (! bfd_set_section_contents (abfd, o->output_section, |
11866 | o->contents, | |
11867 | (file_ptr) o->output_offset, | |
eea6121a | 11868 | o->size)) |
c152c796 AM |
11869 | goto error_return; |
11870 | } | |
11871 | else | |
11872 | { | |
11873 | /* The contents of the .dynstr section are actually in a | |
11874 | stringtab. */ | |
8539e4e8 AM |
11875 | file_ptr off; |
11876 | ||
c152c796 AM |
11877 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; |
11878 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
11879 | || ! _bfd_elf_strtab_emit (abfd, | |
11880 | elf_hash_table (info)->dynstr)) | |
11881 | goto error_return; | |
11882 | } | |
11883 | } | |
11884 | } | |
11885 | ||
0e1862bb | 11886 | if (bfd_link_relocatable (info)) |
c152c796 AM |
11887 | { |
11888 | bfd_boolean failed = FALSE; | |
11889 | ||
11890 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
11891 | if (failed) | |
11892 | goto error_return; | |
11893 | } | |
11894 | ||
11895 | /* If we have optimized stabs strings, output them. */ | |
3722b82f | 11896 | if (elf_hash_table (info)->stab_info.stabstr != NULL) |
c152c796 AM |
11897 | { |
11898 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
11899 | goto error_return; | |
11900 | } | |
11901 | ||
9f7c3e5e AM |
11902 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
11903 | goto error_return; | |
c152c796 | 11904 | |
9f7c3e5e | 11905 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 11906 | |
12bd6957 | 11907 | elf_linker (abfd) = TRUE; |
c152c796 | 11908 | |
104d59d1 JM |
11909 | if (attr_section) |
11910 | { | |
a50b1753 | 11911 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 11912 | if (contents == NULL) |
d0f16d5e | 11913 | return FALSE; /* Bail out and fail. */ |
104d59d1 JM |
11914 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
11915 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
11916 | free (contents); | |
11917 | } | |
11918 | ||
c152c796 AM |
11919 | return TRUE; |
11920 | ||
11921 | error_return: | |
9f7c3e5e | 11922 | elf_final_link_free (abfd, &flinfo); |
c152c796 AM |
11923 | return FALSE; |
11924 | } | |
11925 | \f | |
5241d853 RS |
11926 | /* Initialize COOKIE for input bfd ABFD. */ |
11927 | ||
11928 | static bfd_boolean | |
11929 | init_reloc_cookie (struct elf_reloc_cookie *cookie, | |
11930 | struct bfd_link_info *info, bfd *abfd) | |
11931 | { | |
11932 | Elf_Internal_Shdr *symtab_hdr; | |
11933 | const struct elf_backend_data *bed; | |
11934 | ||
11935 | bed = get_elf_backend_data (abfd); | |
11936 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11937 | ||
11938 | cookie->abfd = abfd; | |
11939 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
11940 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
11941 | if (cookie->bad_symtab) | |
11942 | { | |
11943 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
11944 | cookie->extsymoff = 0; | |
11945 | } | |
11946 | else | |
11947 | { | |
11948 | cookie->locsymcount = symtab_hdr->sh_info; | |
11949 | cookie->extsymoff = symtab_hdr->sh_info; | |
11950 | } | |
11951 | ||
11952 | if (bed->s->arch_size == 32) | |
11953 | cookie->r_sym_shift = 8; | |
11954 | else | |
11955 | cookie->r_sym_shift = 32; | |
11956 | ||
11957 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
11958 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
11959 | { | |
11960 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
11961 | cookie->locsymcount, 0, | |
11962 | NULL, NULL, NULL); | |
11963 | if (cookie->locsyms == NULL) | |
11964 | { | |
11965 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
11966 | return FALSE; | |
11967 | } | |
11968 | if (info->keep_memory) | |
11969 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
11970 | } | |
11971 | return TRUE; | |
11972 | } | |
11973 | ||
11974 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
11975 | ||
11976 | static void | |
11977 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
11978 | { | |
11979 | Elf_Internal_Shdr *symtab_hdr; | |
11980 | ||
11981 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11982 | if (cookie->locsyms != NULL | |
11983 | && symtab_hdr->contents != (unsigned char *) cookie->locsyms) | |
11984 | free (cookie->locsyms); | |
11985 | } | |
11986 | ||
11987 | /* Initialize the relocation information in COOKIE for input section SEC | |
11988 | of input bfd ABFD. */ | |
11989 | ||
11990 | static bfd_boolean | |
11991 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
11992 | struct bfd_link_info *info, bfd *abfd, | |
11993 | asection *sec) | |
11994 | { | |
11995 | const struct elf_backend_data *bed; | |
11996 | ||
11997 | if (sec->reloc_count == 0) | |
11998 | { | |
11999 | cookie->rels = NULL; | |
12000 | cookie->relend = NULL; | |
12001 | } | |
12002 | else | |
12003 | { | |
12004 | bed = get_elf_backend_data (abfd); | |
12005 | ||
12006 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
12007 | info->keep_memory); | |
12008 | if (cookie->rels == NULL) | |
12009 | return FALSE; | |
12010 | cookie->rel = cookie->rels; | |
12011 | cookie->relend = (cookie->rels | |
12012 | + sec->reloc_count * bed->s->int_rels_per_ext_rel); | |
12013 | } | |
12014 | cookie->rel = cookie->rels; | |
12015 | return TRUE; | |
12016 | } | |
12017 | ||
12018 | /* Free the memory allocated by init_reloc_cookie_rels, | |
12019 | if appropriate. */ | |
12020 | ||
12021 | static void | |
12022 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
12023 | asection *sec) | |
12024 | { | |
12025 | if (cookie->rels && elf_section_data (sec)->relocs != cookie->rels) | |
12026 | free (cookie->rels); | |
12027 | } | |
12028 | ||
12029 | /* Initialize the whole of COOKIE for input section SEC. */ | |
12030 | ||
12031 | static bfd_boolean | |
12032 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12033 | struct bfd_link_info *info, | |
12034 | asection *sec) | |
12035 | { | |
12036 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
12037 | goto error1; | |
12038 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
12039 | goto error2; | |
12040 | return TRUE; | |
12041 | ||
12042 | error2: | |
12043 | fini_reloc_cookie (cookie, sec->owner); | |
12044 | error1: | |
12045 | return FALSE; | |
12046 | } | |
12047 | ||
12048 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
12049 | if appropriate. */ | |
12050 | ||
12051 | static void | |
12052 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
12053 | asection *sec) | |
12054 | { | |
12055 | fini_reloc_cookie_rels (cookie, sec); | |
12056 | fini_reloc_cookie (cookie, sec->owner); | |
12057 | } | |
12058 | \f | |
c152c796 AM |
12059 | /* Garbage collect unused sections. */ |
12060 | ||
07adf181 AM |
12061 | /* Default gc_mark_hook. */ |
12062 | ||
12063 | asection * | |
12064 | _bfd_elf_gc_mark_hook (asection *sec, | |
12065 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
12066 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
12067 | struct elf_link_hash_entry *h, | |
12068 | Elf_Internal_Sym *sym) | |
12069 | { | |
bde6f3eb L |
12070 | const char *sec_name; |
12071 | ||
07adf181 AM |
12072 | if (h != NULL) |
12073 | { | |
12074 | switch (h->root.type) | |
12075 | { | |
12076 | case bfd_link_hash_defined: | |
12077 | case bfd_link_hash_defweak: | |
12078 | return h->root.u.def.section; | |
12079 | ||
12080 | case bfd_link_hash_common: | |
12081 | return h->root.u.c.p->section; | |
12082 | ||
bde6f3eb L |
12083 | case bfd_link_hash_undefined: |
12084 | case bfd_link_hash_undefweak: | |
12085 | /* To work around a glibc bug, keep all XXX input sections | |
12086 | when there is an as yet undefined reference to __start_XXX | |
12087 | or __stop_XXX symbols. The linker will later define such | |
12088 | symbols for orphan input sections that have a name | |
12089 | representable as a C identifier. */ | |
12090 | if (strncmp (h->root.root.string, "__start_", 8) == 0) | |
12091 | sec_name = h->root.root.string + 8; | |
12092 | else if (strncmp (h->root.root.string, "__stop_", 7) == 0) | |
12093 | sec_name = h->root.root.string + 7; | |
12094 | else | |
12095 | sec_name = NULL; | |
12096 | ||
12097 | if (sec_name && *sec_name != '\0') | |
12098 | { | |
12099 | bfd *i; | |
68ffbac6 | 12100 | |
c72f2fb2 | 12101 | for (i = info->input_bfds; i; i = i->link.next) |
bde6f3eb L |
12102 | { |
12103 | sec = bfd_get_section_by_name (i, sec_name); | |
12104 | if (sec) | |
12105 | sec->flags |= SEC_KEEP; | |
12106 | } | |
12107 | } | |
12108 | break; | |
12109 | ||
07adf181 AM |
12110 | default: |
12111 | break; | |
12112 | } | |
12113 | } | |
12114 | else | |
12115 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
12116 | ||
12117 | return NULL; | |
12118 | } | |
12119 | ||
5241d853 RS |
12120 | /* COOKIE->rel describes a relocation against section SEC, which is |
12121 | a section we've decided to keep. Return the section that contains | |
12122 | the relocation symbol, or NULL if no section contains it. */ | |
12123 | ||
12124 | asection * | |
12125 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
12126 | elf_gc_mark_hook_fn gc_mark_hook, | |
12127 | struct elf_reloc_cookie *cookie) | |
12128 | { | |
12129 | unsigned long r_symndx; | |
12130 | struct elf_link_hash_entry *h; | |
12131 | ||
12132 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 12133 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
12134 | return NULL; |
12135 | ||
12136 | if (r_symndx >= cookie->locsymcount | |
12137 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
12138 | { | |
12139 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
263ddf68 L |
12140 | if (h == NULL) |
12141 | { | |
12142 | info->callbacks->einfo (_("%F%P: corrupt input: %B\n"), | |
12143 | sec->owner); | |
12144 | return NULL; | |
12145 | } | |
5241d853 RS |
12146 | while (h->root.type == bfd_link_hash_indirect |
12147 | || h->root.type == bfd_link_hash_warning) | |
12148 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1d5316ab | 12149 | h->mark = 1; |
4e6b54a6 AM |
12150 | /* If this symbol is weak and there is a non-weak definition, we |
12151 | keep the non-weak definition because many backends put | |
12152 | dynamic reloc info on the non-weak definition for code | |
12153 | handling copy relocs. */ | |
12154 | if (h->u.weakdef != NULL) | |
12155 | h->u.weakdef->mark = 1; | |
5241d853 RS |
12156 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
12157 | } | |
12158 | ||
12159 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
12160 | &cookie->locsyms[r_symndx]); | |
12161 | } | |
12162 | ||
12163 | /* COOKIE->rel describes a relocation against section SEC, which is | |
12164 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 12165 | the relocation symbol. */ |
5241d853 RS |
12166 | |
12167 | bfd_boolean | |
12168 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, | |
12169 | asection *sec, | |
12170 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 12171 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
12172 | { |
12173 | asection *rsec; | |
12174 | ||
12175 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie); | |
12176 | if (rsec && !rsec->gc_mark) | |
12177 | { | |
a66eed7a AM |
12178 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour |
12179 | || (rsec->owner->flags & DYNAMIC) != 0) | |
5241d853 | 12180 | rsec->gc_mark = 1; |
5241d853 RS |
12181 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) |
12182 | return FALSE; | |
12183 | } | |
12184 | return TRUE; | |
12185 | } | |
12186 | ||
07adf181 AM |
12187 | /* The mark phase of garbage collection. For a given section, mark |
12188 | it and any sections in this section's group, and all the sections | |
12189 | which define symbols to which it refers. */ | |
12190 | ||
ccfa59ea AM |
12191 | bfd_boolean |
12192 | _bfd_elf_gc_mark (struct bfd_link_info *info, | |
12193 | asection *sec, | |
6a5bb875 | 12194 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 AM |
12195 | { |
12196 | bfd_boolean ret; | |
9d0a14d3 | 12197 | asection *group_sec, *eh_frame; |
c152c796 AM |
12198 | |
12199 | sec->gc_mark = 1; | |
12200 | ||
12201 | /* Mark all the sections in the group. */ | |
12202 | group_sec = elf_section_data (sec)->next_in_group; | |
12203 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 12204 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
c152c796 AM |
12205 | return FALSE; |
12206 | ||
12207 | /* Look through the section relocs. */ | |
12208 | ret = TRUE; | |
9d0a14d3 RS |
12209 | eh_frame = elf_eh_frame_section (sec->owner); |
12210 | if ((sec->flags & SEC_RELOC) != 0 | |
12211 | && sec->reloc_count > 0 | |
12212 | && sec != eh_frame) | |
c152c796 | 12213 | { |
5241d853 | 12214 | struct elf_reloc_cookie cookie; |
c152c796 | 12215 | |
5241d853 RS |
12216 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
12217 | ret = FALSE; | |
c152c796 | 12218 | else |
c152c796 | 12219 | { |
5241d853 | 12220 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 12221 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 RS |
12222 | { |
12223 | ret = FALSE; | |
12224 | break; | |
12225 | } | |
12226 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
12227 | } |
12228 | } | |
9d0a14d3 RS |
12229 | |
12230 | if (ret && eh_frame && elf_fde_list (sec)) | |
12231 | { | |
12232 | struct elf_reloc_cookie cookie; | |
12233 | ||
12234 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
12235 | ret = FALSE; | |
12236 | else | |
12237 | { | |
12238 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
12239 | gc_mark_hook, &cookie)) | |
12240 | ret = FALSE; | |
12241 | fini_reloc_cookie_for_section (&cookie, eh_frame); | |
12242 | } | |
12243 | } | |
12244 | ||
2f0c68f2 CM |
12245 | eh_frame = elf_section_eh_frame_entry (sec); |
12246 | if (ret && eh_frame && !eh_frame->gc_mark) | |
12247 | if (!_bfd_elf_gc_mark (info, eh_frame, gc_mark_hook)) | |
12248 | ret = FALSE; | |
12249 | ||
c152c796 AM |
12250 | return ret; |
12251 | } | |
12252 | ||
3c758495 TG |
12253 | /* Scan and mark sections in a special or debug section group. */ |
12254 | ||
12255 | static void | |
12256 | _bfd_elf_gc_mark_debug_special_section_group (asection *grp) | |
12257 | { | |
12258 | /* Point to first section of section group. */ | |
12259 | asection *ssec; | |
12260 | /* Used to iterate the section group. */ | |
12261 | asection *msec; | |
12262 | ||
12263 | bfd_boolean is_special_grp = TRUE; | |
12264 | bfd_boolean is_debug_grp = TRUE; | |
12265 | ||
12266 | /* First scan to see if group contains any section other than debug | |
12267 | and special section. */ | |
12268 | ssec = msec = elf_next_in_group (grp); | |
12269 | do | |
12270 | { | |
12271 | if ((msec->flags & SEC_DEBUGGING) == 0) | |
12272 | is_debug_grp = FALSE; | |
12273 | ||
12274 | if ((msec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) != 0) | |
12275 | is_special_grp = FALSE; | |
12276 | ||
12277 | msec = elf_next_in_group (msec); | |
12278 | } | |
12279 | while (msec != ssec); | |
12280 | ||
12281 | /* If this is a pure debug section group or pure special section group, | |
12282 | keep all sections in this group. */ | |
12283 | if (is_debug_grp || is_special_grp) | |
12284 | { | |
12285 | do | |
12286 | { | |
12287 | msec->gc_mark = 1; | |
12288 | msec = elf_next_in_group (msec); | |
12289 | } | |
12290 | while (msec != ssec); | |
12291 | } | |
12292 | } | |
12293 | ||
7f6ab9f8 AM |
12294 | /* Keep debug and special sections. */ |
12295 | ||
12296 | bfd_boolean | |
12297 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, | |
12298 | elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED) | |
12299 | { | |
12300 | bfd *ibfd; | |
12301 | ||
c72f2fb2 | 12302 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
7f6ab9f8 AM |
12303 | { |
12304 | asection *isec; | |
12305 | bfd_boolean some_kept; | |
b40bf0a2 | 12306 | bfd_boolean debug_frag_seen; |
7f6ab9f8 AM |
12307 | |
12308 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
12309 | continue; | |
12310 | ||
b40bf0a2 NC |
12311 | /* Ensure all linker created sections are kept, |
12312 | see if any other section is already marked, | |
12313 | and note if we have any fragmented debug sections. */ | |
12314 | debug_frag_seen = some_kept = FALSE; | |
7f6ab9f8 AM |
12315 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
12316 | { | |
12317 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
12318 | isec->gc_mark = 1; | |
12319 | else if (isec->gc_mark) | |
12320 | some_kept = TRUE; | |
b40bf0a2 NC |
12321 | |
12322 | if (debug_frag_seen == FALSE | |
12323 | && (isec->flags & SEC_DEBUGGING) | |
12324 | && CONST_STRNEQ (isec->name, ".debug_line.")) | |
12325 | debug_frag_seen = TRUE; | |
7f6ab9f8 AM |
12326 | } |
12327 | ||
12328 | /* If no section in this file will be kept, then we can | |
b40bf0a2 | 12329 | toss out the debug and special sections. */ |
7f6ab9f8 AM |
12330 | if (!some_kept) |
12331 | continue; | |
12332 | ||
12333 | /* Keep debug and special sections like .comment when they are | |
3c758495 TG |
12334 | not part of a group. Also keep section groups that contain |
12335 | just debug sections or special sections. */ | |
7f6ab9f8 | 12336 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
3c758495 TG |
12337 | { |
12338 | if ((isec->flags & SEC_GROUP) != 0) | |
12339 | _bfd_elf_gc_mark_debug_special_section_group (isec); | |
12340 | else if (((isec->flags & SEC_DEBUGGING) != 0 | |
12341 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0) | |
12342 | && elf_next_in_group (isec) == NULL) | |
12343 | isec->gc_mark = 1; | |
12344 | } | |
b40bf0a2 NC |
12345 | |
12346 | if (! debug_frag_seen) | |
12347 | continue; | |
12348 | ||
12349 | /* Look for CODE sections which are going to be discarded, | |
12350 | and find and discard any fragmented debug sections which | |
12351 | are associated with that code section. */ | |
12352 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
12353 | if ((isec->flags & SEC_CODE) != 0 | |
12354 | && isec->gc_mark == 0) | |
12355 | { | |
12356 | unsigned int ilen; | |
12357 | asection *dsec; | |
12358 | ||
12359 | ilen = strlen (isec->name); | |
12360 | ||
12361 | /* Association is determined by the name of the debug section | |
12362 | containing the name of the code section as a suffix. For | |
12363 | example .debug_line.text.foo is a debug section associated | |
12364 | with .text.foo. */ | |
12365 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
12366 | { | |
12367 | unsigned int dlen; | |
12368 | ||
12369 | if (dsec->gc_mark == 0 | |
12370 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
12371 | continue; | |
12372 | ||
12373 | dlen = strlen (dsec->name); | |
12374 | ||
12375 | if (dlen > ilen | |
12376 | && strncmp (dsec->name + (dlen - ilen), | |
12377 | isec->name, ilen) == 0) | |
12378 | { | |
12379 | dsec->gc_mark = 0; | |
b40bf0a2 NC |
12380 | } |
12381 | } | |
12382 | } | |
7f6ab9f8 AM |
12383 | } |
12384 | return TRUE; | |
12385 | } | |
12386 | ||
c152c796 AM |
12387 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
12388 | ||
c17d87de NC |
12389 | struct elf_gc_sweep_symbol_info |
12390 | { | |
ccabcbe5 AM |
12391 | struct bfd_link_info *info; |
12392 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
12393 | bfd_boolean); | |
12394 | }; | |
12395 | ||
c152c796 | 12396 | static bfd_boolean |
ccabcbe5 | 12397 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
c152c796 | 12398 | { |
1d5316ab AM |
12399 | if (!h->mark |
12400 | && (((h->root.type == bfd_link_hash_defined | |
12401 | || h->root.type == bfd_link_hash_defweak) | |
c4621b33 | 12402 | && !((h->def_regular || ELF_COMMON_DEF_P (h)) |
6673f753 | 12403 | && h->root.u.def.section->gc_mark)) |
1d5316ab AM |
12404 | || h->root.type == bfd_link_hash_undefined |
12405 | || h->root.type == bfd_link_hash_undefweak)) | |
12406 | { | |
12407 | struct elf_gc_sweep_symbol_info *inf; | |
12408 | ||
12409 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
ccabcbe5 | 12410 | (*inf->hide_symbol) (inf->info, h, TRUE); |
1d5316ab AM |
12411 | h->def_regular = 0; |
12412 | h->ref_regular = 0; | |
12413 | h->ref_regular_nonweak = 0; | |
ccabcbe5 | 12414 | } |
c152c796 AM |
12415 | |
12416 | return TRUE; | |
12417 | } | |
12418 | ||
12419 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
12420 | ||
12421 | typedef bfd_boolean (*gc_sweep_hook_fn) | |
12422 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); | |
12423 | ||
12424 | static bfd_boolean | |
ccabcbe5 | 12425 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
12426 | { |
12427 | bfd *sub; | |
ccabcbe5 AM |
12428 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
12429 | gc_sweep_hook_fn gc_sweep_hook = bed->gc_sweep_hook; | |
12430 | unsigned long section_sym_count; | |
12431 | struct elf_gc_sweep_symbol_info sweep_info; | |
c152c796 | 12432 | |
c72f2fb2 | 12433 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12434 | { |
12435 | asection *o; | |
12436 | ||
b19a8f85 L |
12437 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
12438 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
12439 | continue; |
12440 | ||
12441 | for (o = sub->sections; o != NULL; o = o->next) | |
12442 | { | |
a33dafc3 L |
12443 | /* When any section in a section group is kept, we keep all |
12444 | sections in the section group. If the first member of | |
12445 | the section group is excluded, we will also exclude the | |
12446 | group section. */ | |
12447 | if (o->flags & SEC_GROUP) | |
12448 | { | |
12449 | asection *first = elf_next_in_group (o); | |
12450 | o->gc_mark = first->gc_mark; | |
12451 | } | |
c152c796 AM |
12452 | |
12453 | if (o->gc_mark) | |
12454 | continue; | |
12455 | ||
12456 | /* Skip sweeping sections already excluded. */ | |
12457 | if (o->flags & SEC_EXCLUDE) | |
12458 | continue; | |
12459 | ||
12460 | /* Since this is early in the link process, it is simple | |
12461 | to remove a section from the output. */ | |
12462 | o->flags |= SEC_EXCLUDE; | |
12463 | ||
c55fe096 | 12464 | if (info->print_gc_sections && o->size != 0) |
c17d87de NC |
12465 | _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name); |
12466 | ||
c152c796 AM |
12467 | /* But we also have to update some of the relocation |
12468 | info we collected before. */ | |
12469 | if (gc_sweep_hook | |
e8aaee2a | 12470 | && (o->flags & SEC_RELOC) != 0 |
9850436d AM |
12471 | && o->reloc_count != 0 |
12472 | && !((info->strip == strip_all || info->strip == strip_debugger) | |
12473 | && (o->flags & SEC_DEBUGGING) != 0) | |
e8aaee2a | 12474 | && !bfd_is_abs_section (o->output_section)) |
c152c796 AM |
12475 | { |
12476 | Elf_Internal_Rela *internal_relocs; | |
12477 | bfd_boolean r; | |
12478 | ||
12479 | internal_relocs | |
12480 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, | |
12481 | info->keep_memory); | |
12482 | if (internal_relocs == NULL) | |
12483 | return FALSE; | |
12484 | ||
12485 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); | |
12486 | ||
12487 | if (elf_section_data (o)->relocs != internal_relocs) | |
12488 | free (internal_relocs); | |
12489 | ||
12490 | if (!r) | |
12491 | return FALSE; | |
12492 | } | |
12493 | } | |
12494 | } | |
12495 | ||
12496 | /* Remove the symbols that were in the swept sections from the dynamic | |
12497 | symbol table. GCFIXME: Anyone know how to get them out of the | |
12498 | static symbol table as well? */ | |
ccabcbe5 AM |
12499 | sweep_info.info = info; |
12500 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
12501 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
12502 | &sweep_info); | |
c152c796 | 12503 | |
ccabcbe5 | 12504 | _bfd_elf_link_renumber_dynsyms (abfd, info, §ion_sym_count); |
c152c796 AM |
12505 | return TRUE; |
12506 | } | |
12507 | ||
12508 | /* Propagate collected vtable information. This is called through | |
12509 | elf_link_hash_traverse. */ | |
12510 | ||
12511 | static bfd_boolean | |
12512 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) | |
12513 | { | |
c152c796 | 12514 | /* Those that are not vtables. */ |
f6e332e6 | 12515 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12516 | return TRUE; |
12517 | ||
12518 | /* Those vtables that do not have parents, we cannot merge. */ | |
f6e332e6 | 12519 | if (h->vtable->parent == (struct elf_link_hash_entry *) -1) |
c152c796 AM |
12520 | return TRUE; |
12521 | ||
12522 | /* If we've already been done, exit. */ | |
f6e332e6 | 12523 | if (h->vtable->used && h->vtable->used[-1]) |
c152c796 AM |
12524 | return TRUE; |
12525 | ||
12526 | /* Make sure the parent's table is up to date. */ | |
f6e332e6 | 12527 | elf_gc_propagate_vtable_entries_used (h->vtable->parent, okp); |
c152c796 | 12528 | |
f6e332e6 | 12529 | if (h->vtable->used == NULL) |
c152c796 AM |
12530 | { |
12531 | /* None of this table's entries were referenced. Re-use the | |
12532 | parent's table. */ | |
f6e332e6 AM |
12533 | h->vtable->used = h->vtable->parent->vtable->used; |
12534 | h->vtable->size = h->vtable->parent->vtable->size; | |
c152c796 AM |
12535 | } |
12536 | else | |
12537 | { | |
12538 | size_t n; | |
12539 | bfd_boolean *cu, *pu; | |
12540 | ||
12541 | /* Or the parent's entries into ours. */ | |
f6e332e6 | 12542 | cu = h->vtable->used; |
c152c796 | 12543 | cu[-1] = TRUE; |
f6e332e6 | 12544 | pu = h->vtable->parent->vtable->used; |
c152c796 AM |
12545 | if (pu != NULL) |
12546 | { | |
12547 | const struct elf_backend_data *bed; | |
12548 | unsigned int log_file_align; | |
12549 | ||
12550 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
12551 | log_file_align = bed->s->log_file_align; | |
f6e332e6 | 12552 | n = h->vtable->parent->vtable->size >> log_file_align; |
c152c796 AM |
12553 | while (n--) |
12554 | { | |
12555 | if (*pu) | |
12556 | *cu = TRUE; | |
12557 | pu++; | |
12558 | cu++; | |
12559 | } | |
12560 | } | |
12561 | } | |
12562 | ||
12563 | return TRUE; | |
12564 | } | |
12565 | ||
12566 | static bfd_boolean | |
12567 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) | |
12568 | { | |
12569 | asection *sec; | |
12570 | bfd_vma hstart, hend; | |
12571 | Elf_Internal_Rela *relstart, *relend, *rel; | |
12572 | const struct elf_backend_data *bed; | |
12573 | unsigned int log_file_align; | |
12574 | ||
c152c796 AM |
12575 | /* Take care of both those symbols that do not describe vtables as |
12576 | well as those that are not loaded. */ | |
f6e332e6 | 12577 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12578 | return TRUE; |
12579 | ||
12580 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
12581 | || h->root.type == bfd_link_hash_defweak); | |
12582 | ||
12583 | sec = h->root.u.def.section; | |
12584 | hstart = h->root.u.def.value; | |
12585 | hend = hstart + h->size; | |
12586 | ||
12587 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); | |
12588 | if (!relstart) | |
12589 | return *(bfd_boolean *) okp = FALSE; | |
12590 | bed = get_elf_backend_data (sec->owner); | |
12591 | log_file_align = bed->s->log_file_align; | |
12592 | ||
12593 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; | |
12594 | ||
12595 | for (rel = relstart; rel < relend; ++rel) | |
12596 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
12597 | { | |
12598 | /* If the entry is in use, do nothing. */ | |
f6e332e6 AM |
12599 | if (h->vtable->used |
12600 | && (rel->r_offset - hstart) < h->vtable->size) | |
c152c796 AM |
12601 | { |
12602 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
f6e332e6 | 12603 | if (h->vtable->used[entry]) |
c152c796 AM |
12604 | continue; |
12605 | } | |
12606 | /* Otherwise, kill it. */ | |
12607 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
12608 | } | |
12609 | ||
12610 | return TRUE; | |
12611 | } | |
12612 | ||
87538722 AM |
12613 | /* Mark sections containing dynamically referenced symbols. When |
12614 | building shared libraries, we must assume that any visible symbol is | |
12615 | referenced. */ | |
715df9b8 | 12616 | |
64d03ab5 AM |
12617 | bfd_boolean |
12618 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) | |
715df9b8 | 12619 | { |
87538722 | 12620 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 12621 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 12622 | |
715df9b8 EB |
12623 | if ((h->root.type == bfd_link_hash_defined |
12624 | || h->root.type == bfd_link_hash_defweak) | |
87538722 | 12625 | && (h->ref_dynamic |
c4621b33 | 12626 | || ((h->def_regular || ELF_COMMON_DEF_P (h)) |
87538722 | 12627 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 12628 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
0e1862bb | 12629 | && (!bfd_link_executable (info) |
b407645f AM |
12630 | || info->export_dynamic |
12631 | || (h->dynamic | |
12632 | && d != NULL | |
12633 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
422f1182 | 12634 | && (h->versioned >= versioned |
54e8959c L |
12635 | || !bfd_hide_sym_by_version (info->version_info, |
12636 | h->root.root.string))))) | |
715df9b8 EB |
12637 | h->root.u.def.section->flags |= SEC_KEEP; |
12638 | ||
12639 | return TRUE; | |
12640 | } | |
3b36f7e6 | 12641 | |
74f0fb50 AM |
12642 | /* Keep all sections containing symbols undefined on the command-line, |
12643 | and the section containing the entry symbol. */ | |
12644 | ||
12645 | void | |
12646 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
12647 | { | |
12648 | struct bfd_sym_chain *sym; | |
12649 | ||
12650 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
12651 | { | |
12652 | struct elf_link_hash_entry *h; | |
12653 | ||
12654 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
12655 | FALSE, FALSE, FALSE); | |
12656 | ||
12657 | if (h != NULL | |
12658 | && (h->root.type == bfd_link_hash_defined | |
12659 | || h->root.type == bfd_link_hash_defweak) | |
12660 | && !bfd_is_abs_section (h->root.u.def.section)) | |
12661 | h->root.u.def.section->flags |= SEC_KEEP; | |
12662 | } | |
12663 | } | |
12664 | ||
2f0c68f2 CM |
12665 | bfd_boolean |
12666 | bfd_elf_parse_eh_frame_entries (bfd *abfd ATTRIBUTE_UNUSED, | |
12667 | struct bfd_link_info *info) | |
12668 | { | |
12669 | bfd *ibfd = info->input_bfds; | |
12670 | ||
12671 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
12672 | { | |
12673 | asection *sec; | |
12674 | struct elf_reloc_cookie cookie; | |
12675 | ||
12676 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
12677 | continue; | |
12678 | ||
12679 | if (!init_reloc_cookie (&cookie, info, ibfd)) | |
12680 | return FALSE; | |
12681 | ||
12682 | for (sec = ibfd->sections; sec; sec = sec->next) | |
12683 | { | |
12684 | if (CONST_STRNEQ (bfd_section_name (ibfd, sec), ".eh_frame_entry") | |
12685 | && init_reloc_cookie_rels (&cookie, info, ibfd, sec)) | |
12686 | { | |
12687 | _bfd_elf_parse_eh_frame_entry (info, sec, &cookie); | |
12688 | fini_reloc_cookie_rels (&cookie, sec); | |
12689 | } | |
12690 | } | |
12691 | } | |
12692 | return TRUE; | |
12693 | } | |
12694 | ||
c152c796 AM |
12695 | /* Do mark and sweep of unused sections. */ |
12696 | ||
12697 | bfd_boolean | |
12698 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
12699 | { | |
12700 | bfd_boolean ok = TRUE; | |
12701 | bfd *sub; | |
6a5bb875 | 12702 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 12703 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
da44f4e5 | 12704 | struct elf_link_hash_table *htab; |
c152c796 | 12705 | |
64d03ab5 | 12706 | if (!bed->can_gc_sections |
715df9b8 | 12707 | || !is_elf_hash_table (info->hash)) |
c152c796 AM |
12708 | { |
12709 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
12710 | return TRUE; | |
12711 | } | |
12712 | ||
74f0fb50 | 12713 | bed->gc_keep (info); |
da44f4e5 | 12714 | htab = elf_hash_table (info); |
74f0fb50 | 12715 | |
9d0a14d3 RS |
12716 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
12717 | at the .eh_frame section if we can mark the FDEs individually. */ | |
2f0c68f2 CM |
12718 | for (sub = info->input_bfds; |
12719 | info->eh_frame_hdr_type != COMPACT_EH_HDR && sub != NULL; | |
12720 | sub = sub->link.next) | |
9d0a14d3 RS |
12721 | { |
12722 | asection *sec; | |
12723 | struct elf_reloc_cookie cookie; | |
12724 | ||
12725 | sec = bfd_get_section_by_name (sub, ".eh_frame"); | |
9a2a56cc | 12726 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
12727 | { |
12728 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
12729 | if (elf_section_data (sec)->sec_info |
12730 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
12731 | elf_eh_frame_section (sub) = sec; |
12732 | fini_reloc_cookie_for_section (&cookie, sec); | |
9a2a56cc | 12733 | sec = bfd_get_next_section_by_name (sec); |
9d0a14d3 RS |
12734 | } |
12735 | } | |
9d0a14d3 | 12736 | |
c152c796 | 12737 | /* Apply transitive closure to the vtable entry usage info. */ |
da44f4e5 | 12738 | elf_link_hash_traverse (htab, elf_gc_propagate_vtable_entries_used, &ok); |
c152c796 AM |
12739 | if (!ok) |
12740 | return FALSE; | |
12741 | ||
12742 | /* Kill the vtable relocations that were not used. */ | |
da44f4e5 | 12743 | elf_link_hash_traverse (htab, elf_gc_smash_unused_vtentry_relocs, &ok); |
c152c796 AM |
12744 | if (!ok) |
12745 | return FALSE; | |
12746 | ||
715df9b8 | 12747 | /* Mark dynamically referenced symbols. */ |
da44f4e5 AM |
12748 | if (htab->dynamic_sections_created) |
12749 | elf_link_hash_traverse (htab, bed->gc_mark_dynamic_ref, info); | |
c152c796 | 12750 | |
715df9b8 | 12751 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 12752 | gc_mark_hook = bed->gc_mark_hook; |
c72f2fb2 | 12753 | for (sub = info->input_bfds; sub != NULL; sub = sub->link.next) |
c152c796 AM |
12754 | { |
12755 | asection *o; | |
12756 | ||
b19a8f85 L |
12757 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour |
12758 | || !(*bed->relocs_compatible) (sub->xvec, abfd->xvec)) | |
c152c796 AM |
12759 | continue; |
12760 | ||
7f6ab9f8 AM |
12761 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
12762 | Also treat note sections as a root, if the section is not part | |
12763 | of a group. */ | |
c152c796 | 12764 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
12765 | if (!o->gc_mark |
12766 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 12767 | && ((o->flags & SEC_KEEP) != 0 |
7f6ab9f8 AM |
12768 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
12769 | && elf_next_in_group (o) == NULL ))) | |
12770 | { | |
12771 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
12772 | return FALSE; | |
12773 | } | |
c152c796 AM |
12774 | } |
12775 | ||
6a5bb875 | 12776 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 12777 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 12778 | |
c152c796 | 12779 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 12780 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
12781 | } |
12782 | \f | |
12783 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
12784 | ||
12785 | bfd_boolean | |
12786 | bfd_elf_gc_record_vtinherit (bfd *abfd, | |
12787 | asection *sec, | |
12788 | struct elf_link_hash_entry *h, | |
12789 | bfd_vma offset) | |
12790 | { | |
12791 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
12792 | struct elf_link_hash_entry **search, *child; | |
12793 | bfd_size_type extsymcount; | |
12794 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12795 | ||
12796 | /* The sh_info field of the symtab header tells us where the | |
12797 | external symbols start. We don't care about the local symbols at | |
12798 | this point. */ | |
12799 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
12800 | if (!elf_bad_symtab (abfd)) | |
12801 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
12802 | ||
12803 | sym_hashes = elf_sym_hashes (abfd); | |
12804 | sym_hashes_end = sym_hashes + extsymcount; | |
12805 | ||
12806 | /* Hunt down the child symbol, which is in this section at the same | |
12807 | offset as the relocation. */ | |
12808 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
12809 | { | |
12810 | if ((child = *search) != NULL | |
12811 | && (child->root.type == bfd_link_hash_defined | |
12812 | || child->root.type == bfd_link_hash_defweak) | |
12813 | && child->root.u.def.section == sec | |
12814 | && child->root.u.def.value == offset) | |
12815 | goto win; | |
12816 | } | |
12817 | ||
d003868e AM |
12818 | (*_bfd_error_handler) ("%B: %A+%lu: No symbol found for INHERIT", |
12819 | abfd, sec, (unsigned long) offset); | |
c152c796 AM |
12820 | bfd_set_error (bfd_error_invalid_operation); |
12821 | return FALSE; | |
12822 | ||
12823 | win: | |
f6e332e6 AM |
12824 | if (!child->vtable) |
12825 | { | |
ca4be51c AM |
12826 | child->vtable = ((struct elf_link_virtual_table_entry *) |
12827 | bfd_zalloc (abfd, sizeof (*child->vtable))); | |
f6e332e6 AM |
12828 | if (!child->vtable) |
12829 | return FALSE; | |
12830 | } | |
c152c796 AM |
12831 | if (!h) |
12832 | { | |
12833 | /* This *should* only be the absolute section. It could potentially | |
12834 | be that someone has defined a non-global vtable though, which | |
12835 | would be bad. It isn't worth paging in the local symbols to be | |
12836 | sure though; that case should simply be handled by the assembler. */ | |
12837 | ||
f6e332e6 | 12838 | child->vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
12839 | } |
12840 | else | |
f6e332e6 | 12841 | child->vtable->parent = h; |
c152c796 AM |
12842 | |
12843 | return TRUE; | |
12844 | } | |
12845 | ||
12846 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
12847 | ||
12848 | bfd_boolean | |
12849 | bfd_elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, | |
12850 | asection *sec ATTRIBUTE_UNUSED, | |
12851 | struct elf_link_hash_entry *h, | |
12852 | bfd_vma addend) | |
12853 | { | |
12854 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12855 | unsigned int log_file_align = bed->s->log_file_align; | |
12856 | ||
f6e332e6 AM |
12857 | if (!h->vtable) |
12858 | { | |
ca4be51c AM |
12859 | h->vtable = ((struct elf_link_virtual_table_entry *) |
12860 | bfd_zalloc (abfd, sizeof (*h->vtable))); | |
f6e332e6 AM |
12861 | if (!h->vtable) |
12862 | return FALSE; | |
12863 | } | |
12864 | ||
12865 | if (addend >= h->vtable->size) | |
c152c796 AM |
12866 | { |
12867 | size_t size, bytes, file_align; | |
f6e332e6 | 12868 | bfd_boolean *ptr = h->vtable->used; |
c152c796 AM |
12869 | |
12870 | /* While the symbol is undefined, we have to be prepared to handle | |
12871 | a zero size. */ | |
12872 | file_align = 1 << log_file_align; | |
12873 | if (h->root.type == bfd_link_hash_undefined) | |
12874 | size = addend + file_align; | |
12875 | else | |
12876 | { | |
12877 | size = h->size; | |
12878 | if (addend >= size) | |
12879 | { | |
12880 | /* Oops! We've got a reference past the defined end of | |
12881 | the table. This is probably a bug -- shall we warn? */ | |
12882 | size = addend + file_align; | |
12883 | } | |
12884 | } | |
12885 | size = (size + file_align - 1) & -file_align; | |
12886 | ||
12887 | /* Allocate one extra entry for use as a "done" flag for the | |
12888 | consolidation pass. */ | |
12889 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
12890 | ||
12891 | if (ptr) | |
12892 | { | |
a50b1753 | 12893 | ptr = (bfd_boolean *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
12894 | |
12895 | if (ptr != NULL) | |
12896 | { | |
12897 | size_t oldbytes; | |
12898 | ||
f6e332e6 | 12899 | oldbytes = (((h->vtable->size >> log_file_align) + 1) |
c152c796 AM |
12900 | * sizeof (bfd_boolean)); |
12901 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
12902 | } | |
12903 | } | |
12904 | else | |
a50b1753 | 12905 | ptr = (bfd_boolean *) bfd_zmalloc (bytes); |
c152c796 AM |
12906 | |
12907 | if (ptr == NULL) | |
12908 | return FALSE; | |
12909 | ||
12910 | /* And arrange for that done flag to be at index -1. */ | |
f6e332e6 AM |
12911 | h->vtable->used = ptr + 1; |
12912 | h->vtable->size = size; | |
c152c796 AM |
12913 | } |
12914 | ||
f6e332e6 | 12915 | h->vtable->used[addend >> log_file_align] = TRUE; |
c152c796 AM |
12916 | |
12917 | return TRUE; | |
12918 | } | |
12919 | ||
ae17ab41 CM |
12920 | /* Map an ELF section header flag to its corresponding string. */ |
12921 | typedef struct | |
12922 | { | |
12923 | char *flag_name; | |
12924 | flagword flag_value; | |
12925 | } elf_flags_to_name_table; | |
12926 | ||
12927 | static elf_flags_to_name_table elf_flags_to_names [] = | |
12928 | { | |
12929 | { "SHF_WRITE", SHF_WRITE }, | |
12930 | { "SHF_ALLOC", SHF_ALLOC }, | |
12931 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
12932 | { "SHF_MERGE", SHF_MERGE }, | |
12933 | { "SHF_STRINGS", SHF_STRINGS }, | |
12934 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
12935 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
12936 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
12937 | { "SHF_GROUP", SHF_GROUP }, | |
12938 | { "SHF_TLS", SHF_TLS }, | |
12939 | { "SHF_MASKOS", SHF_MASKOS }, | |
12940 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
12941 | }; | |
12942 | ||
b9c361e0 JL |
12943 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
12944 | bfd_boolean | |
ae17ab41 | 12945 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 12946 | struct flag_info *flaginfo, |
b9c361e0 | 12947 | asection *section) |
ae17ab41 | 12948 | { |
8b127cbc | 12949 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 12950 | |
8b127cbc | 12951 | if (!flaginfo->flags_initialized) |
ae17ab41 | 12952 | { |
8b127cbc AM |
12953 | bfd *obfd = info->output_bfd; |
12954 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
12955 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
12956 | int with_hex = 0; |
12957 | int without_hex = 0; | |
12958 | ||
8b127cbc | 12959 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 12960 | { |
b9c361e0 | 12961 | unsigned i; |
8b127cbc | 12962 | flagword (*lookup) (char *); |
ae17ab41 | 12963 | |
8b127cbc AM |
12964 | lookup = bed->elf_backend_lookup_section_flags_hook; |
12965 | if (lookup != NULL) | |
ae17ab41 | 12966 | { |
8b127cbc | 12967 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
12968 | |
12969 | if (hexval != 0) | |
12970 | { | |
12971 | if (tf->with == with_flags) | |
12972 | with_hex |= hexval; | |
12973 | else if (tf->with == without_flags) | |
12974 | without_hex |= hexval; | |
12975 | tf->valid = TRUE; | |
12976 | continue; | |
12977 | } | |
ae17ab41 | 12978 | } |
8b127cbc | 12979 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 12980 | { |
8b127cbc | 12981 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
12982 | { |
12983 | if (tf->with == with_flags) | |
12984 | with_hex |= elf_flags_to_names[i].flag_value; | |
12985 | else if (tf->with == without_flags) | |
12986 | without_hex |= elf_flags_to_names[i].flag_value; | |
12987 | tf->valid = TRUE; | |
12988 | break; | |
12989 | } | |
12990 | } | |
8b127cbc | 12991 | if (!tf->valid) |
b9c361e0 | 12992 | { |
68ffbac6 | 12993 | info->callbacks->einfo |
8b127cbc | 12994 | (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
b9c361e0 | 12995 | return FALSE; |
ae17ab41 CM |
12996 | } |
12997 | } | |
8b127cbc AM |
12998 | flaginfo->flags_initialized = TRUE; |
12999 | flaginfo->only_with_flags |= with_hex; | |
13000 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 13001 | } |
ae17ab41 | 13002 | |
8b127cbc | 13003 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
b9c361e0 JL |
13004 | return FALSE; |
13005 | ||
8b127cbc | 13006 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
b9c361e0 JL |
13007 | return FALSE; |
13008 | ||
13009 | return TRUE; | |
ae17ab41 CM |
13010 | } |
13011 | ||
c152c796 AM |
13012 | struct alloc_got_off_arg { |
13013 | bfd_vma gotoff; | |
10455f89 | 13014 | struct bfd_link_info *info; |
c152c796 AM |
13015 | }; |
13016 | ||
13017 | /* We need a special top-level link routine to convert got reference counts | |
13018 | to real got offsets. */ | |
13019 | ||
13020 | static bfd_boolean | |
13021 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) | |
13022 | { | |
a50b1753 | 13023 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
13024 | bfd *obfd = gofarg->info->output_bfd; |
13025 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 13026 | |
c152c796 AM |
13027 | if (h->got.refcount > 0) |
13028 | { | |
13029 | h->got.offset = gofarg->gotoff; | |
10455f89 | 13030 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
13031 | } |
13032 | else | |
13033 | h->got.offset = (bfd_vma) -1; | |
13034 | ||
13035 | return TRUE; | |
13036 | } | |
13037 | ||
13038 | /* And an accompanying bit to work out final got entry offsets once | |
13039 | we're done. Should be called from final_link. */ | |
13040 | ||
13041 | bfd_boolean | |
13042 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, | |
13043 | struct bfd_link_info *info) | |
13044 | { | |
13045 | bfd *i; | |
13046 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13047 | bfd_vma gotoff; | |
c152c796 AM |
13048 | struct alloc_got_off_arg gofarg; |
13049 | ||
10455f89 HPN |
13050 | BFD_ASSERT (abfd == info->output_bfd); |
13051 | ||
c152c796 AM |
13052 | if (! is_elf_hash_table (info->hash)) |
13053 | return FALSE; | |
13054 | ||
13055 | /* The GOT offset is relative to the .got section, but the GOT header is | |
13056 | put into the .got.plt section, if the backend uses it. */ | |
13057 | if (bed->want_got_plt) | |
13058 | gotoff = 0; | |
13059 | else | |
13060 | gotoff = bed->got_header_size; | |
13061 | ||
13062 | /* Do the local .got entries first. */ | |
c72f2fb2 | 13063 | for (i = info->input_bfds; i; i = i->link.next) |
c152c796 AM |
13064 | { |
13065 | bfd_signed_vma *local_got; | |
13066 | bfd_size_type j, locsymcount; | |
13067 | Elf_Internal_Shdr *symtab_hdr; | |
13068 | ||
13069 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
13070 | continue; | |
13071 | ||
13072 | local_got = elf_local_got_refcounts (i); | |
13073 | if (!local_got) | |
13074 | continue; | |
13075 | ||
13076 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
13077 | if (elf_bad_symtab (i)) | |
13078 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
13079 | else | |
13080 | locsymcount = symtab_hdr->sh_info; | |
13081 | ||
13082 | for (j = 0; j < locsymcount; ++j) | |
13083 | { | |
13084 | if (local_got[j] > 0) | |
13085 | { | |
13086 | local_got[j] = gotoff; | |
10455f89 | 13087 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
13088 | } |
13089 | else | |
13090 | local_got[j] = (bfd_vma) -1; | |
13091 | } | |
13092 | } | |
13093 | ||
13094 | /* Then the global .got entries. .plt refcounts are handled by | |
13095 | adjust_dynamic_symbol */ | |
13096 | gofarg.gotoff = gotoff; | |
10455f89 | 13097 | gofarg.info = info; |
c152c796 AM |
13098 | elf_link_hash_traverse (elf_hash_table (info), |
13099 | elf_gc_allocate_got_offsets, | |
13100 | &gofarg); | |
13101 | return TRUE; | |
13102 | } | |
13103 | ||
13104 | /* Many folk need no more in the way of final link than this, once | |
13105 | got entry reference counting is enabled. */ | |
13106 | ||
13107 | bfd_boolean | |
13108 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) | |
13109 | { | |
13110 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
13111 | return FALSE; | |
13112 | ||
13113 | /* Invoke the regular ELF backend linker to do all the work. */ | |
13114 | return bfd_elf_final_link (abfd, info); | |
13115 | } | |
13116 | ||
13117 | bfd_boolean | |
13118 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) | |
13119 | { | |
a50b1753 | 13120 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
13121 | |
13122 | if (rcookie->bad_symtab) | |
13123 | rcookie->rel = rcookie->rels; | |
13124 | ||
13125 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
13126 | { | |
13127 | unsigned long r_symndx; | |
13128 | ||
13129 | if (! rcookie->bad_symtab) | |
13130 | if (rcookie->rel->r_offset > offset) | |
13131 | return FALSE; | |
13132 | if (rcookie->rel->r_offset != offset) | |
13133 | continue; | |
13134 | ||
13135 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 13136 | if (r_symndx == STN_UNDEF) |
c152c796 AM |
13137 | return TRUE; |
13138 | ||
13139 | if (r_symndx >= rcookie->locsymcount | |
13140 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
13141 | { | |
13142 | struct elf_link_hash_entry *h; | |
13143 | ||
13144 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
13145 | ||
13146 | while (h->root.type == bfd_link_hash_indirect | |
13147 | || h->root.type == bfd_link_hash_warning) | |
13148 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
13149 | ||
13150 | if ((h->root.type == bfd_link_hash_defined | |
13151 | || h->root.type == bfd_link_hash_defweak) | |
5b69e357 AM |
13152 | && (h->root.u.def.section->owner != rcookie->abfd |
13153 | || h->root.u.def.section->kept_section != NULL | |
13154 | || discarded_section (h->root.u.def.section))) | |
c152c796 | 13155 | return TRUE; |
c152c796 AM |
13156 | } |
13157 | else | |
13158 | { | |
13159 | /* It's not a relocation against a global symbol, | |
13160 | but it could be a relocation against a local | |
13161 | symbol for a discarded section. */ | |
13162 | asection *isec; | |
13163 | Elf_Internal_Sym *isym; | |
13164 | ||
13165 | /* Need to: get the symbol; get the section. */ | |
13166 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 13167 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
5b69e357 AM |
13168 | if (isec != NULL |
13169 | && (isec->kept_section != NULL | |
13170 | || discarded_section (isec))) | |
cb33740c | 13171 | return TRUE; |
c152c796 AM |
13172 | } |
13173 | return FALSE; | |
13174 | } | |
13175 | return FALSE; | |
13176 | } | |
13177 | ||
13178 | /* Discard unneeded references to discarded sections. | |
75938853 AM |
13179 | Returns -1 on error, 1 if any section's size was changed, 0 if |
13180 | nothing changed. This function assumes that the relocations are in | |
13181 | sorted order, which is true for all known assemblers. */ | |
c152c796 | 13182 | |
75938853 | 13183 | int |
c152c796 AM |
13184 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) |
13185 | { | |
13186 | struct elf_reloc_cookie cookie; | |
18cd5bce | 13187 | asection *o; |
c152c796 | 13188 | bfd *abfd; |
75938853 | 13189 | int changed = 0; |
c152c796 AM |
13190 | |
13191 | if (info->traditional_format | |
13192 | || !is_elf_hash_table (info->hash)) | |
75938853 | 13193 | return 0; |
c152c796 | 13194 | |
18cd5bce AM |
13195 | o = bfd_get_section_by_name (output_bfd, ".stab"); |
13196 | if (o != NULL) | |
c152c796 | 13197 | { |
18cd5bce | 13198 | asection *i; |
c152c796 | 13199 | |
18cd5bce | 13200 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
8da3dbc5 | 13201 | { |
18cd5bce AM |
13202 | if (i->size == 0 |
13203 | || i->reloc_count == 0 | |
13204 | || i->sec_info_type != SEC_INFO_TYPE_STABS) | |
13205 | continue; | |
c152c796 | 13206 | |
18cd5bce AM |
13207 | abfd = i->owner; |
13208 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13209 | continue; | |
c152c796 | 13210 | |
18cd5bce | 13211 | if (!init_reloc_cookie_for_section (&cookie, info, i)) |
75938853 | 13212 | return -1; |
c152c796 | 13213 | |
18cd5bce AM |
13214 | if (_bfd_discard_section_stabs (abfd, i, |
13215 | elf_section_data (i)->sec_info, | |
5241d853 RS |
13216 | bfd_elf_reloc_symbol_deleted_p, |
13217 | &cookie)) | |
75938853 | 13218 | changed = 1; |
18cd5bce AM |
13219 | |
13220 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13221 | } |
18cd5bce AM |
13222 | } |
13223 | ||
2f0c68f2 CM |
13224 | o = NULL; |
13225 | if (info->eh_frame_hdr_type != COMPACT_EH_HDR) | |
13226 | o = bfd_get_section_by_name (output_bfd, ".eh_frame"); | |
18cd5bce AM |
13227 | if (o != NULL) |
13228 | { | |
13229 | asection *i; | |
c152c796 | 13230 | |
18cd5bce | 13231 | for (i = o->map_head.s; i != NULL; i = i->map_head.s) |
c152c796 | 13232 | { |
18cd5bce AM |
13233 | if (i->size == 0) |
13234 | continue; | |
13235 | ||
13236 | abfd = i->owner; | |
13237 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
13238 | continue; | |
13239 | ||
13240 | if (!init_reloc_cookie_for_section (&cookie, info, i)) | |
75938853 | 13241 | return -1; |
18cd5bce AM |
13242 | |
13243 | _bfd_elf_parse_eh_frame (abfd, info, i, &cookie); | |
13244 | if (_bfd_elf_discard_section_eh_frame (abfd, info, i, | |
c152c796 AM |
13245 | bfd_elf_reloc_symbol_deleted_p, |
13246 | &cookie)) | |
75938853 | 13247 | changed = 1; |
18cd5bce AM |
13248 | |
13249 | fini_reloc_cookie_for_section (&cookie, i); | |
c152c796 | 13250 | } |
18cd5bce | 13251 | } |
c152c796 | 13252 | |
18cd5bce AM |
13253 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link.next) |
13254 | { | |
13255 | const struct elf_backend_data *bed; | |
c152c796 | 13256 | |
18cd5bce AM |
13257 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) |
13258 | continue; | |
13259 | ||
13260 | bed = get_elf_backend_data (abfd); | |
13261 | ||
13262 | if (bed->elf_backend_discard_info != NULL) | |
13263 | { | |
13264 | if (!init_reloc_cookie (&cookie, info, abfd)) | |
75938853 | 13265 | return -1; |
18cd5bce AM |
13266 | |
13267 | if ((*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
75938853 | 13268 | changed = 1; |
18cd5bce AM |
13269 | |
13270 | fini_reloc_cookie (&cookie, abfd); | |
13271 | } | |
c152c796 AM |
13272 | } |
13273 | ||
2f0c68f2 CM |
13274 | if (info->eh_frame_hdr_type == COMPACT_EH_HDR) |
13275 | _bfd_elf_end_eh_frame_parsing (info); | |
13276 | ||
13277 | if (info->eh_frame_hdr_type | |
0e1862bb | 13278 | && !bfd_link_relocatable (info) |
c152c796 | 13279 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) |
75938853 | 13280 | changed = 1; |
c152c796 | 13281 | |
75938853 | 13282 | return changed; |
c152c796 | 13283 | } |
082b7297 | 13284 | |
43e1669b | 13285 | bfd_boolean |
0c511000 | 13286 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 13287 | asection *sec, |
c0f00686 | 13288 | struct bfd_link_info *info) |
082b7297 L |
13289 | { |
13290 | flagword flags; | |
c77ec726 | 13291 | const char *name, *key; |
082b7297 L |
13292 | struct bfd_section_already_linked *l; |
13293 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 13294 | |
c77ec726 AM |
13295 | if (sec->output_section == bfd_abs_section_ptr) |
13296 | return FALSE; | |
0c511000 | 13297 | |
c77ec726 | 13298 | flags = sec->flags; |
0c511000 | 13299 | |
c77ec726 AM |
13300 | /* Return if it isn't a linkonce section. A comdat group section |
13301 | also has SEC_LINK_ONCE set. */ | |
13302 | if ((flags & SEC_LINK_ONCE) == 0) | |
13303 | return FALSE; | |
0c511000 | 13304 | |
c77ec726 AM |
13305 | /* Don't put group member sections on our list of already linked |
13306 | sections. They are handled as a group via their group section. */ | |
13307 | if (elf_sec_group (sec) != NULL) | |
13308 | return FALSE; | |
0c511000 | 13309 | |
c77ec726 AM |
13310 | /* For a SHT_GROUP section, use the group signature as the key. */ |
13311 | name = sec->name; | |
13312 | if ((flags & SEC_GROUP) != 0 | |
13313 | && elf_next_in_group (sec) != NULL | |
13314 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
13315 | key = elf_group_name (elf_next_in_group (sec)); | |
13316 | else | |
13317 | { | |
13318 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
0c511000 | 13319 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
c77ec726 AM |
13320 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
13321 | key++; | |
0c511000 | 13322 | else |
c77ec726 AM |
13323 | /* Must be a user linkonce section that doesn't follow gcc's |
13324 | naming convention. In this case we won't be matching | |
13325 | single member groups. */ | |
13326 | key = name; | |
0c511000 | 13327 | } |
6d2cd210 | 13328 | |
c77ec726 | 13329 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
13330 | |
13331 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13332 | { | |
c2370991 | 13333 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
13334 | sections with a signature of <key> (<key> is some string), |
13335 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
13336 | Match like sections. LTO plugin sections are an exception. | |
13337 | They are always named .gnu.linkonce.t.<key> and match either | |
13338 | type of section. */ | |
13339 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
13340 | && ((flags & SEC_GROUP) != 0 | |
13341 | || strcmp (name, l->sec->name) == 0)) | |
13342 | || (l->sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
13343 | { |
13344 | /* The section has already been linked. See if we should | |
6d2cd210 | 13345 | issue a warning. */ |
c77ec726 AM |
13346 | if (!_bfd_handle_already_linked (sec, l, info)) |
13347 | return FALSE; | |
082b7297 | 13348 | |
c77ec726 | 13349 | if (flags & SEC_GROUP) |
3d7f7666 | 13350 | { |
c77ec726 AM |
13351 | asection *first = elf_next_in_group (sec); |
13352 | asection *s = first; | |
3d7f7666 | 13353 | |
c77ec726 | 13354 | while (s != NULL) |
3d7f7666 | 13355 | { |
c77ec726 AM |
13356 | s->output_section = bfd_abs_section_ptr; |
13357 | /* Record which group discards it. */ | |
13358 | s->kept_section = l->sec; | |
13359 | s = elf_next_in_group (s); | |
13360 | /* These lists are circular. */ | |
13361 | if (s == first) | |
13362 | break; | |
3d7f7666 L |
13363 | } |
13364 | } | |
082b7297 | 13365 | |
43e1669b | 13366 | return TRUE; |
082b7297 L |
13367 | } |
13368 | } | |
13369 | ||
c77ec726 AM |
13370 | /* A single member comdat group section may be discarded by a |
13371 | linkonce section and vice versa. */ | |
13372 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 13373 | { |
c77ec726 | 13374 | asection *first = elf_next_in_group (sec); |
c2370991 | 13375 | |
c77ec726 AM |
13376 | if (first != NULL && elf_next_in_group (first) == first) |
13377 | /* Check this single member group against linkonce sections. */ | |
13378 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13379 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13380 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
13381 | { | |
13382 | first->output_section = bfd_abs_section_ptr; | |
13383 | first->kept_section = l->sec; | |
13384 | sec->output_section = bfd_abs_section_ptr; | |
13385 | break; | |
13386 | } | |
13387 | } | |
13388 | else | |
13389 | /* Check this linkonce section against single member groups. */ | |
13390 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13391 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 13392 | { |
c77ec726 | 13393 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 13394 | |
c77ec726 AM |
13395 | if (first != NULL |
13396 | && elf_next_in_group (first) == first | |
13397 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
13398 | { | |
13399 | sec->output_section = bfd_abs_section_ptr; | |
13400 | sec->kept_section = first; | |
13401 | break; | |
13402 | } | |
6d2cd210 | 13403 | } |
0c511000 | 13404 | |
c77ec726 AM |
13405 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
13406 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
13407 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
13408 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
13409 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
13410 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
13411 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
13412 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
13413 | The reverse order cannot happen as there is never a bfd with only the | |
13414 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
13415 | matter as here were are looking only for cross-bfd sections. */ | |
13416 | ||
13417 | if ((flags & SEC_GROUP) == 0 && CONST_STRNEQ (name, ".gnu.linkonce.r.")) | |
13418 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
13419 | if ((l->sec->flags & SEC_GROUP) == 0 | |
13420 | && CONST_STRNEQ (l->sec->name, ".gnu.linkonce.t.")) | |
13421 | { | |
13422 | if (abfd != l->sec->owner) | |
13423 | sec->output_section = bfd_abs_section_ptr; | |
13424 | break; | |
13425 | } | |
80c29487 | 13426 | |
082b7297 | 13427 | /* This is the first section with this name. Record it. */ |
c77ec726 | 13428 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 13429 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 13430 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 13431 | } |
81e1b023 | 13432 | |
a4d8e49b L |
13433 | bfd_boolean |
13434 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) | |
13435 | { | |
13436 | return sym->st_shndx == SHN_COMMON; | |
13437 | } | |
13438 | ||
13439 | unsigned int | |
13440 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
13441 | { | |
13442 | return SHN_COMMON; | |
13443 | } | |
13444 | ||
13445 | asection * | |
13446 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
13447 | { | |
13448 | return bfd_com_section_ptr; | |
13449 | } | |
10455f89 HPN |
13450 | |
13451 | bfd_vma | |
13452 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
13453 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
13454 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
13455 | bfd *ibfd ATTRIBUTE_UNUSED, | |
13456 | unsigned long symndx ATTRIBUTE_UNUSED) | |
13457 | { | |
13458 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13459 | return bed->s->arch_size / 8; | |
13460 | } | |
83bac4b0 NC |
13461 | |
13462 | /* Routines to support the creation of dynamic relocs. */ | |
13463 | ||
83bac4b0 NC |
13464 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
13465 | ||
13466 | static const char * | |
13467 | get_dynamic_reloc_section_name (bfd * abfd, | |
13468 | asection * sec, | |
13469 | bfd_boolean is_rela) | |
13470 | { | |
ddcf1fcf BS |
13471 | char *name; |
13472 | const char *old_name = bfd_get_section_name (NULL, sec); | |
13473 | const char *prefix = is_rela ? ".rela" : ".rel"; | |
83bac4b0 | 13474 | |
ddcf1fcf | 13475 | if (old_name == NULL) |
83bac4b0 NC |
13476 | return NULL; |
13477 | ||
ddcf1fcf | 13478 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 13479 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
13480 | |
13481 | return name; | |
13482 | } | |
13483 | ||
13484 | /* Returns the dynamic reloc section associated with SEC. | |
13485 | If necessary compute the name of the dynamic reloc section based | |
13486 | on SEC's name (looked up in ABFD's string table) and the setting | |
13487 | of IS_RELA. */ | |
13488 | ||
13489 | asection * | |
13490 | _bfd_elf_get_dynamic_reloc_section (bfd * abfd, | |
13491 | asection * sec, | |
13492 | bfd_boolean is_rela) | |
13493 | { | |
13494 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13495 | ||
13496 | if (reloc_sec == NULL) | |
13497 | { | |
13498 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13499 | ||
13500 | if (name != NULL) | |
13501 | { | |
3d4d4302 | 13502 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
13503 | |
13504 | if (reloc_sec != NULL) | |
13505 | elf_section_data (sec)->sreloc = reloc_sec; | |
13506 | } | |
13507 | } | |
13508 | ||
13509 | return reloc_sec; | |
13510 | } | |
13511 | ||
13512 | /* Returns the dynamic reloc section associated with SEC. If the | |
13513 | section does not exist it is created and attached to the DYNOBJ | |
13514 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
13515 | structure. | |
f8076f98 | 13516 | |
83bac4b0 NC |
13517 | ALIGNMENT is the alignment for the newly created section and |
13518 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
13519 | or .rel.<SEC's name>. The section name is looked up in the | |
13520 | string table associated with ABFD. */ | |
13521 | ||
13522 | asection * | |
ca4be51c AM |
13523 | _bfd_elf_make_dynamic_reloc_section (asection *sec, |
13524 | bfd *dynobj, | |
13525 | unsigned int alignment, | |
13526 | bfd *abfd, | |
13527 | bfd_boolean is_rela) | |
83bac4b0 NC |
13528 | { |
13529 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13530 | ||
13531 | if (reloc_sec == NULL) | |
13532 | { | |
13533 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13534 | ||
13535 | if (name == NULL) | |
13536 | return NULL; | |
13537 | ||
3d4d4302 | 13538 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
13539 | |
13540 | if (reloc_sec == NULL) | |
13541 | { | |
3d4d4302 AM |
13542 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
13543 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
13544 | if ((sec->flags & SEC_ALLOC) != 0) |
13545 | flags |= SEC_ALLOC | SEC_LOAD; | |
13546 | ||
3d4d4302 | 13547 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
13548 | if (reloc_sec != NULL) |
13549 | { | |
8877b5e5 AM |
13550 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
13551 | name. Override as it may be wrong, eg. for a user | |
13552 | section named "auto" we'll get ".relauto" which is | |
13553 | seen to be a .rela section. */ | |
13554 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
83bac4b0 NC |
13555 | if (! bfd_set_section_alignment (dynobj, reloc_sec, alignment)) |
13556 | reloc_sec = NULL; | |
13557 | } | |
13558 | } | |
13559 | ||
13560 | elf_section_data (sec)->sreloc = reloc_sec; | |
13561 | } | |
13562 | ||
13563 | return reloc_sec; | |
13564 | } | |
1338dd10 | 13565 | |
bffebb6b AM |
13566 | /* Copy the ELF symbol type and other attributes for a linker script |
13567 | assignment from HSRC to HDEST. Generally this should be treated as | |
13568 | if we found a strong non-dynamic definition for HDEST (except that | |
13569 | ld ignores multiple definition errors). */ | |
1338dd10 | 13570 | void |
bffebb6b AM |
13571 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd, |
13572 | struct bfd_link_hash_entry *hdest, | |
13573 | struct bfd_link_hash_entry *hsrc) | |
1338dd10 | 13574 | { |
bffebb6b AM |
13575 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *) hdest; |
13576 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *) hsrc; | |
13577 | Elf_Internal_Sym isym; | |
1338dd10 PB |
13578 | |
13579 | ehdest->type = ehsrc->type; | |
35fc36a8 | 13580 | ehdest->target_internal = ehsrc->target_internal; |
bffebb6b AM |
13581 | |
13582 | isym.st_other = ehsrc->other; | |
b8417128 | 13583 | elf_merge_st_other (abfd, ehdest, &isym, NULL, TRUE, FALSE); |
1338dd10 | 13584 | } |
351f65ca L |
13585 | |
13586 | /* Append a RELA relocation REL to section S in BFD. */ | |
13587 | ||
13588 | void | |
13589 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13590 | { | |
13591 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13592 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
13593 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
13594 | bed->s->swap_reloca_out (abfd, rel, loc); | |
13595 | } | |
13596 | ||
13597 | /* Append a REL relocation REL to section S in BFD. */ | |
13598 | ||
13599 | void | |
13600 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13601 | { | |
13602 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13603 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
13604 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 13605 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 13606 | } |