Commit | Line | Data |
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252b5132 | 1 | /* ELF linking support for BFD. |
4b95cf5c | 2 | Copyright (C) 1995-2014 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" |
252b5132 RH |
23 | #include "bfdlink.h" |
24 | #include "libbfd.h" | |
25 | #define ARCH_SIZE 0 | |
26 | #include "elf-bfd.h" | |
4ad4eba5 | 27 | #include "safe-ctype.h" |
ccf2f652 | 28 | #include "libiberty.h" |
66eb6687 | 29 | #include "objalloc.h" |
252b5132 | 30 | |
28caa186 AM |
31 | /* This struct is used to pass information to routines called via |
32 | elf_link_hash_traverse which must return failure. */ | |
33 | ||
34 | struct elf_info_failed | |
35 | { | |
36 | struct bfd_link_info *info; | |
28caa186 AM |
37 | bfd_boolean failed; |
38 | }; | |
39 | ||
40 | /* This structure is used to pass information to | |
41 | _bfd_elf_link_find_version_dependencies. */ | |
42 | ||
43 | struct elf_find_verdep_info | |
44 | { | |
45 | /* General link information. */ | |
46 | struct bfd_link_info *info; | |
47 | /* The number of dependencies. */ | |
48 | unsigned int vers; | |
49 | /* Whether we had a failure. */ | |
50 | bfd_boolean failed; | |
51 | }; | |
52 | ||
53 | static bfd_boolean _bfd_elf_fix_symbol_flags | |
54 | (struct elf_link_hash_entry *, struct elf_info_failed *); | |
55 | ||
d98685ac AM |
56 | /* Define a symbol in a dynamic linkage section. */ |
57 | ||
58 | struct elf_link_hash_entry * | |
59 | _bfd_elf_define_linkage_sym (bfd *abfd, | |
60 | struct bfd_link_info *info, | |
61 | asection *sec, | |
62 | const char *name) | |
63 | { | |
64 | struct elf_link_hash_entry *h; | |
65 | struct bfd_link_hash_entry *bh; | |
ccabcbe5 | 66 | const struct elf_backend_data *bed; |
d98685ac AM |
67 | |
68 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, FALSE); | |
69 | if (h != NULL) | |
70 | { | |
71 | /* Zap symbol defined in an as-needed lib that wasn't linked. | |
72 | This is a symptom of a larger problem: Absolute symbols | |
73 | defined in shared libraries can't be overridden, because we | |
74 | lose the link to the bfd which is via the symbol section. */ | |
75 | h->root.type = bfd_link_hash_new; | |
76 | } | |
77 | ||
78 | bh = &h->root; | |
79 | if (!_bfd_generic_link_add_one_symbol (info, abfd, name, BSF_GLOBAL, | |
80 | sec, 0, NULL, FALSE, | |
81 | get_elf_backend_data (abfd)->collect, | |
82 | &bh)) | |
83 | return NULL; | |
84 | h = (struct elf_link_hash_entry *) bh; | |
85 | h->def_regular = 1; | |
e28df02b | 86 | h->non_elf = 0; |
d98685ac | 87 | h->type = STT_OBJECT; |
00b7642b AM |
88 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
89 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
d98685ac | 90 | |
ccabcbe5 AM |
91 | bed = get_elf_backend_data (abfd); |
92 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
d98685ac AM |
93 | return h; |
94 | } | |
95 | ||
b34976b6 | 96 | bfd_boolean |
268b6b39 | 97 | _bfd_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
252b5132 RH |
98 | { |
99 | flagword flags; | |
aad5d350 | 100 | asection *s; |
252b5132 | 101 | struct elf_link_hash_entry *h; |
9c5bfbb7 | 102 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 103 | struct elf_link_hash_table *htab = elf_hash_table (info); |
252b5132 RH |
104 | |
105 | /* This function may be called more than once. */ | |
3d4d4302 AM |
106 | s = bfd_get_linker_section (abfd, ".got"); |
107 | if (s != NULL) | |
b34976b6 | 108 | return TRUE; |
252b5132 | 109 | |
e5a52504 | 110 | flags = bed->dynamic_sec_flags; |
252b5132 | 111 | |
14b2f831 AM |
112 | s = bfd_make_section_anyway_with_flags (abfd, |
113 | (bed->rela_plts_and_copies_p | |
114 | ? ".rela.got" : ".rel.got"), | |
115 | (bed->dynamic_sec_flags | |
116 | | SEC_READONLY)); | |
6de2ae4a L |
117 | if (s == NULL |
118 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
119 | return FALSE; | |
120 | htab->srelgot = s; | |
252b5132 | 121 | |
14b2f831 | 122 | s = bfd_make_section_anyway_with_flags (abfd, ".got", flags); |
64e77c6d L |
123 | if (s == NULL |
124 | || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
125 | return FALSE; | |
126 | htab->sgot = s; | |
127 | ||
252b5132 RH |
128 | if (bed->want_got_plt) |
129 | { | |
14b2f831 | 130 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); |
252b5132 | 131 | if (s == NULL |
6de2ae4a L |
132 | || !bfd_set_section_alignment (abfd, s, |
133 | bed->s->log_file_align)) | |
b34976b6 | 134 | return FALSE; |
6de2ae4a | 135 | htab->sgotplt = s; |
252b5132 RH |
136 | } |
137 | ||
64e77c6d L |
138 | /* The first bit of the global offset table is the header. */ |
139 | s->size += bed->got_header_size; | |
140 | ||
2517a57f AM |
141 | if (bed->want_got_sym) |
142 | { | |
143 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
144 | (or .got.plt) section. We don't do this in the linker script | |
145 | because we don't want to define the symbol if we are not creating | |
146 | a global offset table. */ | |
6de2ae4a L |
147 | h = _bfd_elf_define_linkage_sym (abfd, info, s, |
148 | "_GLOBAL_OFFSET_TABLE_"); | |
2517a57f | 149 | elf_hash_table (info)->hgot = h; |
d98685ac AM |
150 | if (h == NULL) |
151 | return FALSE; | |
2517a57f | 152 | } |
252b5132 | 153 | |
b34976b6 | 154 | return TRUE; |
252b5132 RH |
155 | } |
156 | \f | |
7e9f0867 AM |
157 | /* Create a strtab to hold the dynamic symbol names. */ |
158 | static bfd_boolean | |
159 | _bfd_elf_link_create_dynstrtab (bfd *abfd, struct bfd_link_info *info) | |
160 | { | |
161 | struct elf_link_hash_table *hash_table; | |
162 | ||
163 | hash_table = elf_hash_table (info); | |
164 | if (hash_table->dynobj == NULL) | |
165 | hash_table->dynobj = abfd; | |
166 | ||
167 | if (hash_table->dynstr == NULL) | |
168 | { | |
169 | hash_table->dynstr = _bfd_elf_strtab_init (); | |
170 | if (hash_table->dynstr == NULL) | |
171 | return FALSE; | |
172 | } | |
173 | return TRUE; | |
174 | } | |
175 | ||
45d6a902 AM |
176 | /* Create some sections which will be filled in with dynamic linking |
177 | information. ABFD is an input file which requires dynamic sections | |
178 | to be created. The dynamic sections take up virtual memory space | |
179 | when the final executable is run, so we need to create them before | |
180 | addresses are assigned to the output sections. We work out the | |
181 | actual contents and size of these sections later. */ | |
252b5132 | 182 | |
b34976b6 | 183 | bfd_boolean |
268b6b39 | 184 | _bfd_elf_link_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
252b5132 | 185 | { |
45d6a902 | 186 | flagword flags; |
91d6fa6a | 187 | asection *s; |
9c5bfbb7 | 188 | const struct elf_backend_data *bed; |
9637f6ef | 189 | struct elf_link_hash_entry *h; |
252b5132 | 190 | |
0eddce27 | 191 | if (! is_elf_hash_table (info->hash)) |
45d6a902 AM |
192 | return FALSE; |
193 | ||
194 | if (elf_hash_table (info)->dynamic_sections_created) | |
195 | return TRUE; | |
196 | ||
7e9f0867 AM |
197 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
198 | return FALSE; | |
45d6a902 | 199 | |
7e9f0867 | 200 | abfd = elf_hash_table (info)->dynobj; |
e5a52504 MM |
201 | bed = get_elf_backend_data (abfd); |
202 | ||
203 | flags = bed->dynamic_sec_flags; | |
45d6a902 AM |
204 | |
205 | /* A dynamically linked executable has a .interp section, but a | |
206 | shared library does not. */ | |
36af4a4e | 207 | if (info->executable) |
252b5132 | 208 | { |
14b2f831 AM |
209 | s = bfd_make_section_anyway_with_flags (abfd, ".interp", |
210 | flags | SEC_READONLY); | |
3496cb2a | 211 | if (s == NULL) |
45d6a902 AM |
212 | return FALSE; |
213 | } | |
bb0deeff | 214 | |
45d6a902 AM |
215 | /* Create sections to hold version informations. These are removed |
216 | if they are not needed. */ | |
14b2f831 AM |
217 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_d", |
218 | flags | SEC_READONLY); | |
45d6a902 | 219 | if (s == NULL |
45d6a902 AM |
220 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
221 | return FALSE; | |
222 | ||
14b2f831 AM |
223 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version", |
224 | flags | SEC_READONLY); | |
45d6a902 | 225 | if (s == NULL |
45d6a902 AM |
226 | || ! bfd_set_section_alignment (abfd, s, 1)) |
227 | return FALSE; | |
228 | ||
14b2f831 AM |
229 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.version_r", |
230 | flags | SEC_READONLY); | |
45d6a902 | 231 | if (s == NULL |
45d6a902 AM |
232 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
233 | return FALSE; | |
234 | ||
14b2f831 AM |
235 | s = bfd_make_section_anyway_with_flags (abfd, ".dynsym", |
236 | flags | SEC_READONLY); | |
45d6a902 | 237 | if (s == NULL |
45d6a902 AM |
238 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
239 | return FALSE; | |
240 | ||
14b2f831 AM |
241 | s = bfd_make_section_anyway_with_flags (abfd, ".dynstr", |
242 | flags | SEC_READONLY); | |
3496cb2a | 243 | if (s == NULL) |
45d6a902 AM |
244 | return FALSE; |
245 | ||
14b2f831 | 246 | s = bfd_make_section_anyway_with_flags (abfd, ".dynamic", flags); |
45d6a902 | 247 | if (s == NULL |
45d6a902 AM |
248 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
249 | return FALSE; | |
250 | ||
251 | /* The special symbol _DYNAMIC is always set to the start of the | |
77cfaee6 AM |
252 | .dynamic section. We could set _DYNAMIC in a linker script, but we |
253 | only want to define it if we are, in fact, creating a .dynamic | |
254 | section. We don't want to define it if there is no .dynamic | |
255 | section, since on some ELF platforms the start up code examines it | |
256 | to decide how to initialize the process. */ | |
9637f6ef L |
257 | h = _bfd_elf_define_linkage_sym (abfd, info, s, "_DYNAMIC"); |
258 | elf_hash_table (info)->hdynamic = h; | |
259 | if (h == NULL) | |
45d6a902 AM |
260 | return FALSE; |
261 | ||
fdc90cb4 JJ |
262 | if (info->emit_hash) |
263 | { | |
14b2f831 AM |
264 | s = bfd_make_section_anyway_with_flags (abfd, ".hash", |
265 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
266 | if (s == NULL |
267 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
268 | return FALSE; | |
269 | elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry; | |
270 | } | |
271 | ||
272 | if (info->emit_gnu_hash) | |
273 | { | |
14b2f831 AM |
274 | s = bfd_make_section_anyway_with_flags (abfd, ".gnu.hash", |
275 | flags | SEC_READONLY); | |
fdc90cb4 JJ |
276 | if (s == NULL |
277 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) | |
278 | return FALSE; | |
279 | /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section: | |
280 | 4 32-bit words followed by variable count of 64-bit words, then | |
281 | variable count of 32-bit words. */ | |
282 | if (bed->s->arch_size == 64) | |
283 | elf_section_data (s)->this_hdr.sh_entsize = 0; | |
284 | else | |
285 | elf_section_data (s)->this_hdr.sh_entsize = 4; | |
286 | } | |
45d6a902 AM |
287 | |
288 | /* Let the backend create the rest of the sections. This lets the | |
289 | backend set the right flags. The backend will normally create | |
290 | the .got and .plt sections. */ | |
894891db NC |
291 | if (bed->elf_backend_create_dynamic_sections == NULL |
292 | || ! (*bed->elf_backend_create_dynamic_sections) (abfd, info)) | |
45d6a902 AM |
293 | return FALSE; |
294 | ||
295 | elf_hash_table (info)->dynamic_sections_created = TRUE; | |
296 | ||
297 | return TRUE; | |
298 | } | |
299 | ||
300 | /* Create dynamic sections when linking against a dynamic object. */ | |
301 | ||
302 | bfd_boolean | |
268b6b39 | 303 | _bfd_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
45d6a902 AM |
304 | { |
305 | flagword flags, pltflags; | |
7325306f | 306 | struct elf_link_hash_entry *h; |
45d6a902 | 307 | asection *s; |
9c5bfbb7 | 308 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
6de2ae4a | 309 | struct elf_link_hash_table *htab = elf_hash_table (info); |
45d6a902 | 310 | |
252b5132 RH |
311 | /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
312 | .rel[a].bss sections. */ | |
e5a52504 | 313 | flags = bed->dynamic_sec_flags; |
252b5132 RH |
314 | |
315 | pltflags = flags; | |
252b5132 | 316 | if (bed->plt_not_loaded) |
6df4d94c MM |
317 | /* We do not clear SEC_ALLOC here because we still want the OS to |
318 | allocate space for the section; it's just that there's nothing | |
319 | to read in from the object file. */ | |
5d1634d7 | 320 | pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS); |
6df4d94c MM |
321 | else |
322 | pltflags |= SEC_ALLOC | SEC_CODE | SEC_LOAD; | |
252b5132 RH |
323 | if (bed->plt_readonly) |
324 | pltflags |= SEC_READONLY; | |
325 | ||
14b2f831 | 326 | s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
252b5132 | 327 | if (s == NULL |
252b5132 | 328 | || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment)) |
b34976b6 | 329 | return FALSE; |
6de2ae4a | 330 | htab->splt = s; |
252b5132 | 331 | |
d98685ac AM |
332 | /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
333 | .plt section. */ | |
7325306f RS |
334 | if (bed->want_plt_sym) |
335 | { | |
336 | h = _bfd_elf_define_linkage_sym (abfd, info, s, | |
337 | "_PROCEDURE_LINKAGE_TABLE_"); | |
338 | elf_hash_table (info)->hplt = h; | |
339 | if (h == NULL) | |
340 | return FALSE; | |
341 | } | |
252b5132 | 342 | |
14b2f831 AM |
343 | s = bfd_make_section_anyway_with_flags (abfd, |
344 | (bed->rela_plts_and_copies_p | |
345 | ? ".rela.plt" : ".rel.plt"), | |
346 | flags | SEC_READONLY); | |
252b5132 | 347 | if (s == NULL |
45d6a902 | 348 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 349 | return FALSE; |
6de2ae4a | 350 | htab->srelplt = s; |
252b5132 RH |
351 | |
352 | if (! _bfd_elf_create_got_section (abfd, info)) | |
b34976b6 | 353 | return FALSE; |
252b5132 | 354 | |
3018b441 RH |
355 | if (bed->want_dynbss) |
356 | { | |
357 | /* The .dynbss section is a place to put symbols which are defined | |
358 | by dynamic objects, are referenced by regular objects, and are | |
359 | not functions. We must allocate space for them in the process | |
360 | image and use a R_*_COPY reloc to tell the dynamic linker to | |
361 | initialize them at run time. The linker script puts the .dynbss | |
362 | section into the .bss section of the final image. */ | |
14b2f831 AM |
363 | s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
364 | (SEC_ALLOC | SEC_LINKER_CREATED)); | |
3496cb2a | 365 | if (s == NULL) |
b34976b6 | 366 | return FALSE; |
252b5132 | 367 | |
3018b441 | 368 | /* The .rel[a].bss section holds copy relocs. This section is not |
77cfaee6 AM |
369 | normally needed. We need to create it here, though, so that the |
370 | linker will map it to an output section. We can't just create it | |
371 | only if we need it, because we will not know whether we need it | |
372 | until we have seen all the input files, and the first time the | |
373 | main linker code calls BFD after examining all the input files | |
374 | (size_dynamic_sections) the input sections have already been | |
375 | mapped to the output sections. If the section turns out not to | |
376 | be needed, we can discard it later. We will never need this | |
377 | section when generating a shared object, since they do not use | |
378 | copy relocs. */ | |
3018b441 RH |
379 | if (! info->shared) |
380 | { | |
14b2f831 AM |
381 | s = bfd_make_section_anyway_with_flags (abfd, |
382 | (bed->rela_plts_and_copies_p | |
383 | ? ".rela.bss" : ".rel.bss"), | |
384 | flags | SEC_READONLY); | |
3018b441 | 385 | if (s == NULL |
45d6a902 | 386 | || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align)) |
b34976b6 | 387 | return FALSE; |
3018b441 | 388 | } |
252b5132 RH |
389 | } |
390 | ||
b34976b6 | 391 | return TRUE; |
252b5132 RH |
392 | } |
393 | \f | |
252b5132 RH |
394 | /* Record a new dynamic symbol. We record the dynamic symbols as we |
395 | read the input files, since we need to have a list of all of them | |
396 | before we can determine the final sizes of the output sections. | |
397 | Note that we may actually call this function even though we are not | |
398 | going to output any dynamic symbols; in some cases we know that a | |
399 | symbol should be in the dynamic symbol table, but only if there is | |
400 | one. */ | |
401 | ||
b34976b6 | 402 | bfd_boolean |
c152c796 AM |
403 | bfd_elf_link_record_dynamic_symbol (struct bfd_link_info *info, |
404 | struct elf_link_hash_entry *h) | |
252b5132 RH |
405 | { |
406 | if (h->dynindx == -1) | |
407 | { | |
2b0f7ef9 | 408 | struct elf_strtab_hash *dynstr; |
68b6ddd0 | 409 | char *p; |
252b5132 | 410 | const char *name; |
252b5132 RH |
411 | bfd_size_type indx; |
412 | ||
7a13edea NC |
413 | /* XXX: The ABI draft says the linker must turn hidden and |
414 | internal symbols into STB_LOCAL symbols when producing the | |
415 | DSO. However, if ld.so honors st_other in the dynamic table, | |
416 | this would not be necessary. */ | |
417 | switch (ELF_ST_VISIBILITY (h->other)) | |
418 | { | |
419 | case STV_INTERNAL: | |
420 | case STV_HIDDEN: | |
9d6eee78 L |
421 | if (h->root.type != bfd_link_hash_undefined |
422 | && h->root.type != bfd_link_hash_undefweak) | |
38048eb9 | 423 | { |
f5385ebf | 424 | h->forced_local = 1; |
67687978 PB |
425 | if (!elf_hash_table (info)->is_relocatable_executable) |
426 | return TRUE; | |
7a13edea | 427 | } |
0444bdd4 | 428 | |
7a13edea NC |
429 | default: |
430 | break; | |
431 | } | |
432 | ||
252b5132 RH |
433 | h->dynindx = elf_hash_table (info)->dynsymcount; |
434 | ++elf_hash_table (info)->dynsymcount; | |
435 | ||
436 | dynstr = elf_hash_table (info)->dynstr; | |
437 | if (dynstr == NULL) | |
438 | { | |
439 | /* Create a strtab to hold the dynamic symbol names. */ | |
2b0f7ef9 | 440 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); |
252b5132 | 441 | if (dynstr == NULL) |
b34976b6 | 442 | return FALSE; |
252b5132 RH |
443 | } |
444 | ||
445 | /* We don't put any version information in the dynamic string | |
aad5d350 | 446 | table. */ |
252b5132 RH |
447 | name = h->root.root.string; |
448 | p = strchr (name, ELF_VER_CHR); | |
68b6ddd0 AM |
449 | if (p != NULL) |
450 | /* We know that the p points into writable memory. In fact, | |
451 | there are only a few symbols that have read-only names, being | |
452 | those like _GLOBAL_OFFSET_TABLE_ that are created specially | |
453 | by the backends. Most symbols will have names pointing into | |
454 | an ELF string table read from a file, or to objalloc memory. */ | |
455 | *p = 0; | |
456 | ||
457 | indx = _bfd_elf_strtab_add (dynstr, name, p != NULL); | |
458 | ||
459 | if (p != NULL) | |
460 | *p = ELF_VER_CHR; | |
252b5132 RH |
461 | |
462 | if (indx == (bfd_size_type) -1) | |
b34976b6 | 463 | return FALSE; |
252b5132 RH |
464 | h->dynstr_index = indx; |
465 | } | |
466 | ||
b34976b6 | 467 | return TRUE; |
252b5132 | 468 | } |
45d6a902 | 469 | \f |
55255dae L |
470 | /* Mark a symbol dynamic. */ |
471 | ||
28caa186 | 472 | static void |
55255dae | 473 | bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info *info, |
40b36307 L |
474 | struct elf_link_hash_entry *h, |
475 | Elf_Internal_Sym *sym) | |
55255dae | 476 | { |
40b36307 | 477 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
55255dae | 478 | |
40b36307 L |
479 | /* It may be called more than once on the same H. */ |
480 | if(h->dynamic || info->relocatable) | |
55255dae L |
481 | return; |
482 | ||
40b36307 L |
483 | if ((info->dynamic_data |
484 | && (h->type == STT_OBJECT | |
485 | || (sym != NULL | |
486 | && ELF_ST_TYPE (sym->st_info) == STT_OBJECT))) | |
a0c8462f | 487 | || (d != NULL |
40b36307 L |
488 | && h->root.type == bfd_link_hash_new |
489 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
55255dae L |
490 | h->dynamic = 1; |
491 | } | |
492 | ||
45d6a902 AM |
493 | /* Record an assignment to a symbol made by a linker script. We need |
494 | this in case some dynamic object refers to this symbol. */ | |
495 | ||
496 | bfd_boolean | |
fe21a8fc L |
497 | bfd_elf_record_link_assignment (bfd *output_bfd, |
498 | struct bfd_link_info *info, | |
268b6b39 | 499 | const char *name, |
fe21a8fc L |
500 | bfd_boolean provide, |
501 | bfd_boolean hidden) | |
45d6a902 | 502 | { |
00cbee0a | 503 | struct elf_link_hash_entry *h, *hv; |
4ea42fb7 | 504 | struct elf_link_hash_table *htab; |
00cbee0a | 505 | const struct elf_backend_data *bed; |
45d6a902 | 506 | |
0eddce27 | 507 | if (!is_elf_hash_table (info->hash)) |
45d6a902 AM |
508 | return TRUE; |
509 | ||
4ea42fb7 AM |
510 | htab = elf_hash_table (info); |
511 | h = elf_link_hash_lookup (htab, name, !provide, TRUE, FALSE); | |
45d6a902 | 512 | if (h == NULL) |
4ea42fb7 | 513 | return provide; |
45d6a902 | 514 | |
00cbee0a | 515 | switch (h->root.type) |
77cfaee6 | 516 | { |
00cbee0a L |
517 | case bfd_link_hash_defined: |
518 | case bfd_link_hash_defweak: | |
519 | case bfd_link_hash_common: | |
520 | break; | |
521 | case bfd_link_hash_undefweak: | |
522 | case bfd_link_hash_undefined: | |
523 | /* Since we're defining the symbol, don't let it seem to have not | |
524 | been defined. record_dynamic_symbol and size_dynamic_sections | |
525 | may depend on this. */ | |
4ea42fb7 | 526 | h->root.type = bfd_link_hash_new; |
77cfaee6 AM |
527 | if (h->root.u.undef.next != NULL || htab->root.undefs_tail == &h->root) |
528 | bfd_link_repair_undef_list (&htab->root); | |
00cbee0a L |
529 | break; |
530 | case bfd_link_hash_new: | |
40b36307 | 531 | bfd_elf_link_mark_dynamic_symbol (info, h, NULL); |
55255dae | 532 | h->non_elf = 0; |
00cbee0a L |
533 | break; |
534 | case bfd_link_hash_indirect: | |
535 | /* We had a versioned symbol in a dynamic library. We make the | |
a0c8462f | 536 | the versioned symbol point to this one. */ |
00cbee0a L |
537 | bed = get_elf_backend_data (output_bfd); |
538 | hv = h; | |
539 | while (hv->root.type == bfd_link_hash_indirect | |
540 | || hv->root.type == bfd_link_hash_warning) | |
541 | hv = (struct elf_link_hash_entry *) hv->root.u.i.link; | |
542 | /* We don't need to update h->root.u since linker will set them | |
543 | later. */ | |
544 | h->root.type = bfd_link_hash_undefined; | |
545 | hv->root.type = bfd_link_hash_indirect; | |
546 | hv->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
547 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hv); | |
548 | break; | |
549 | case bfd_link_hash_warning: | |
550 | abort (); | |
551 | break; | |
55255dae | 552 | } |
45d6a902 AM |
553 | |
554 | /* If this symbol is being provided by the linker script, and it is | |
555 | currently defined by a dynamic object, but not by a regular | |
556 | object, then mark it as undefined so that the generic linker will | |
557 | force the correct value. */ | |
558 | if (provide | |
f5385ebf AM |
559 | && h->def_dynamic |
560 | && !h->def_regular) | |
45d6a902 AM |
561 | h->root.type = bfd_link_hash_undefined; |
562 | ||
563 | /* If this symbol is not being provided by the linker script, and it is | |
564 | currently defined by a dynamic object, but not by a regular object, | |
565 | then clear out any version information because the symbol will not be | |
566 | associated with the dynamic object any more. */ | |
567 | if (!provide | |
f5385ebf AM |
568 | && h->def_dynamic |
569 | && !h->def_regular) | |
45d6a902 AM |
570 | h->verinfo.verdef = NULL; |
571 | ||
f5385ebf | 572 | h->def_regular = 1; |
45d6a902 | 573 | |
eb8476a6 | 574 | if (hidden) |
fe21a8fc | 575 | { |
91d6fa6a | 576 | bed = get_elf_backend_data (output_bfd); |
b8297068 AM |
577 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
578 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; | |
fe21a8fc L |
579 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); |
580 | } | |
581 | ||
6fa3860b PB |
582 | /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects |
583 | and executables. */ | |
584 | if (!info->relocatable | |
585 | && h->dynindx != -1 | |
586 | && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
587 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL)) | |
588 | h->forced_local = 1; | |
589 | ||
f5385ebf AM |
590 | if ((h->def_dynamic |
591 | || h->ref_dynamic | |
67687978 PB |
592 | || info->shared |
593 | || (info->executable && elf_hash_table (info)->is_relocatable_executable)) | |
45d6a902 AM |
594 | && h->dynindx == -1) |
595 | { | |
c152c796 | 596 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
45d6a902 AM |
597 | return FALSE; |
598 | ||
599 | /* If this is a weak defined symbol, and we know a corresponding | |
600 | real symbol from the same dynamic object, make sure the real | |
601 | symbol is also made into a dynamic symbol. */ | |
f6e332e6 AM |
602 | if (h->u.weakdef != NULL |
603 | && h->u.weakdef->dynindx == -1) | |
45d6a902 | 604 | { |
f6e332e6 | 605 | if (! bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
45d6a902 AM |
606 | return FALSE; |
607 | } | |
608 | } | |
609 | ||
610 | return TRUE; | |
611 | } | |
42751cf3 | 612 | |
8c58d23b AM |
613 | /* Record a new local dynamic symbol. Returns 0 on failure, 1 on |
614 | success, and 2 on a failure caused by attempting to record a symbol | |
615 | in a discarded section, eg. a discarded link-once section symbol. */ | |
616 | ||
617 | int | |
c152c796 AM |
618 | bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *info, |
619 | bfd *input_bfd, | |
620 | long input_indx) | |
8c58d23b AM |
621 | { |
622 | bfd_size_type amt; | |
623 | struct elf_link_local_dynamic_entry *entry; | |
624 | struct elf_link_hash_table *eht; | |
625 | struct elf_strtab_hash *dynstr; | |
626 | unsigned long dynstr_index; | |
627 | char *name; | |
628 | Elf_External_Sym_Shndx eshndx; | |
629 | char esym[sizeof (Elf64_External_Sym)]; | |
630 | ||
0eddce27 | 631 | if (! is_elf_hash_table (info->hash)) |
8c58d23b AM |
632 | return 0; |
633 | ||
634 | /* See if the entry exists already. */ | |
635 | for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next) | |
636 | if (entry->input_bfd == input_bfd && entry->input_indx == input_indx) | |
637 | return 1; | |
638 | ||
639 | amt = sizeof (*entry); | |
a50b1753 | 640 | entry = (struct elf_link_local_dynamic_entry *) bfd_alloc (input_bfd, amt); |
8c58d23b AM |
641 | if (entry == NULL) |
642 | return 0; | |
643 | ||
644 | /* Go find the symbol, so that we can find it's name. */ | |
645 | if (!bfd_elf_get_elf_syms (input_bfd, &elf_tdata (input_bfd)->symtab_hdr, | |
268b6b39 | 646 | 1, input_indx, &entry->isym, esym, &eshndx)) |
8c58d23b AM |
647 | { |
648 | bfd_release (input_bfd, entry); | |
649 | return 0; | |
650 | } | |
651 | ||
652 | if (entry->isym.st_shndx != SHN_UNDEF | |
4fbb74a6 | 653 | && entry->isym.st_shndx < SHN_LORESERVE) |
8c58d23b AM |
654 | { |
655 | asection *s; | |
656 | ||
657 | s = bfd_section_from_elf_index (input_bfd, entry->isym.st_shndx); | |
658 | if (s == NULL || bfd_is_abs_section (s->output_section)) | |
659 | { | |
660 | /* We can still bfd_release here as nothing has done another | |
661 | bfd_alloc. We can't do this later in this function. */ | |
662 | bfd_release (input_bfd, entry); | |
663 | return 2; | |
664 | } | |
665 | } | |
666 | ||
667 | name = (bfd_elf_string_from_elf_section | |
668 | (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link, | |
669 | entry->isym.st_name)); | |
670 | ||
671 | dynstr = elf_hash_table (info)->dynstr; | |
672 | if (dynstr == NULL) | |
673 | { | |
674 | /* Create a strtab to hold the dynamic symbol names. */ | |
675 | elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init (); | |
676 | if (dynstr == NULL) | |
677 | return 0; | |
678 | } | |
679 | ||
b34976b6 | 680 | dynstr_index = _bfd_elf_strtab_add (dynstr, name, FALSE); |
8c58d23b AM |
681 | if (dynstr_index == (unsigned long) -1) |
682 | return 0; | |
683 | entry->isym.st_name = dynstr_index; | |
684 | ||
685 | eht = elf_hash_table (info); | |
686 | ||
687 | entry->next = eht->dynlocal; | |
688 | eht->dynlocal = entry; | |
689 | entry->input_bfd = input_bfd; | |
690 | entry->input_indx = input_indx; | |
691 | eht->dynsymcount++; | |
692 | ||
693 | /* Whatever binding the symbol had before, it's now local. */ | |
694 | entry->isym.st_info | |
695 | = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info)); | |
696 | ||
697 | /* The dynindx will be set at the end of size_dynamic_sections. */ | |
698 | ||
699 | return 1; | |
700 | } | |
701 | ||
30b30c21 | 702 | /* Return the dynindex of a local dynamic symbol. */ |
42751cf3 | 703 | |
30b30c21 | 704 | long |
268b6b39 AM |
705 | _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *info, |
706 | bfd *input_bfd, | |
707 | long input_indx) | |
30b30c21 RH |
708 | { |
709 | struct elf_link_local_dynamic_entry *e; | |
710 | ||
711 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
712 | if (e->input_bfd == input_bfd && e->input_indx == input_indx) | |
713 | return e->dynindx; | |
714 | return -1; | |
715 | } | |
716 | ||
717 | /* This function is used to renumber the dynamic symbols, if some of | |
718 | them are removed because they are marked as local. This is called | |
719 | via elf_link_hash_traverse. */ | |
720 | ||
b34976b6 | 721 | static bfd_boolean |
268b6b39 AM |
722 | elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry *h, |
723 | void *data) | |
42751cf3 | 724 | { |
a50b1753 | 725 | size_t *count = (size_t *) data; |
30b30c21 | 726 | |
6fa3860b PB |
727 | if (h->forced_local) |
728 | return TRUE; | |
729 | ||
730 | if (h->dynindx != -1) | |
731 | h->dynindx = ++(*count); | |
732 | ||
733 | return TRUE; | |
734 | } | |
735 | ||
736 | ||
737 | /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with | |
738 | STB_LOCAL binding. */ | |
739 | ||
740 | static bfd_boolean | |
741 | elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry *h, | |
742 | void *data) | |
743 | { | |
a50b1753 | 744 | size_t *count = (size_t *) data; |
6fa3860b | 745 | |
6fa3860b PB |
746 | if (!h->forced_local) |
747 | return TRUE; | |
748 | ||
42751cf3 | 749 | if (h->dynindx != -1) |
30b30c21 RH |
750 | h->dynindx = ++(*count); |
751 | ||
b34976b6 | 752 | return TRUE; |
42751cf3 | 753 | } |
30b30c21 | 754 | |
aee6f5b4 AO |
755 | /* Return true if the dynamic symbol for a given section should be |
756 | omitted when creating a shared library. */ | |
757 | bfd_boolean | |
758 | _bfd_elf_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED, | |
759 | struct bfd_link_info *info, | |
760 | asection *p) | |
761 | { | |
74541ad4 AM |
762 | struct elf_link_hash_table *htab; |
763 | ||
aee6f5b4 AO |
764 | switch (elf_section_data (p)->this_hdr.sh_type) |
765 | { | |
766 | case SHT_PROGBITS: | |
767 | case SHT_NOBITS: | |
768 | /* If sh_type is yet undecided, assume it could be | |
769 | SHT_PROGBITS/SHT_NOBITS. */ | |
770 | case SHT_NULL: | |
74541ad4 AM |
771 | htab = elf_hash_table (info); |
772 | if (p == htab->tls_sec) | |
773 | return FALSE; | |
774 | ||
775 | if (htab->text_index_section != NULL) | |
776 | return p != htab->text_index_section && p != htab->data_index_section; | |
777 | ||
aee6f5b4 AO |
778 | if (strcmp (p->name, ".got") == 0 |
779 | || strcmp (p->name, ".got.plt") == 0 | |
780 | || strcmp (p->name, ".plt") == 0) | |
781 | { | |
782 | asection *ip; | |
aee6f5b4 | 783 | |
74541ad4 | 784 | if (htab->dynobj != NULL |
3d4d4302 | 785 | && (ip = bfd_get_linker_section (htab->dynobj, p->name)) != NULL |
aee6f5b4 AO |
786 | && ip->output_section == p) |
787 | return TRUE; | |
788 | } | |
789 | return FALSE; | |
790 | ||
791 | /* There shouldn't be section relative relocations | |
792 | against any other section. */ | |
793 | default: | |
794 | return TRUE; | |
795 | } | |
796 | } | |
797 | ||
062e2358 | 798 | /* Assign dynsym indices. In a shared library we generate a section |
6fa3860b PB |
799 | symbol for each output section, which come first. Next come symbols |
800 | which have been forced to local binding. Then all of the back-end | |
801 | allocated local dynamic syms, followed by the rest of the global | |
802 | symbols. */ | |
30b30c21 | 803 | |
554220db AM |
804 | static unsigned long |
805 | _bfd_elf_link_renumber_dynsyms (bfd *output_bfd, | |
806 | struct bfd_link_info *info, | |
807 | unsigned long *section_sym_count) | |
30b30c21 RH |
808 | { |
809 | unsigned long dynsymcount = 0; | |
810 | ||
67687978 | 811 | if (info->shared || elf_hash_table (info)->is_relocatable_executable) |
30b30c21 | 812 | { |
aee6f5b4 | 813 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); |
30b30c21 RH |
814 | asection *p; |
815 | for (p = output_bfd->sections; p ; p = p->next) | |
8c37241b | 816 | if ((p->flags & SEC_EXCLUDE) == 0 |
aee6f5b4 AO |
817 | && (p->flags & SEC_ALLOC) != 0 |
818 | && !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p)) | |
819 | elf_section_data (p)->dynindx = ++dynsymcount; | |
74541ad4 AM |
820 | else |
821 | elf_section_data (p)->dynindx = 0; | |
30b30c21 | 822 | } |
554220db | 823 | *section_sym_count = dynsymcount; |
30b30c21 | 824 | |
6fa3860b PB |
825 | elf_link_hash_traverse (elf_hash_table (info), |
826 | elf_link_renumber_local_hash_table_dynsyms, | |
827 | &dynsymcount); | |
828 | ||
30b30c21 RH |
829 | if (elf_hash_table (info)->dynlocal) |
830 | { | |
831 | struct elf_link_local_dynamic_entry *p; | |
832 | for (p = elf_hash_table (info)->dynlocal; p ; p = p->next) | |
833 | p->dynindx = ++dynsymcount; | |
834 | } | |
835 | ||
836 | elf_link_hash_traverse (elf_hash_table (info), | |
837 | elf_link_renumber_hash_table_dynsyms, | |
838 | &dynsymcount); | |
839 | ||
840 | /* There is an unused NULL entry at the head of the table which | |
841 | we must account for in our count. Unless there weren't any | |
842 | symbols, which means we'll have no table at all. */ | |
843 | if (dynsymcount != 0) | |
844 | ++dynsymcount; | |
845 | ||
ccabcbe5 AM |
846 | elf_hash_table (info)->dynsymcount = dynsymcount; |
847 | return dynsymcount; | |
30b30c21 | 848 | } |
252b5132 | 849 | |
54ac0771 L |
850 | /* Merge st_other field. */ |
851 | ||
852 | static void | |
853 | elf_merge_st_other (bfd *abfd, struct elf_link_hash_entry *h, | |
854 | Elf_Internal_Sym *isym, bfd_boolean definition, | |
855 | bfd_boolean dynamic) | |
856 | { | |
857 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
858 | ||
859 | /* If st_other has a processor-specific meaning, specific | |
860 | code might be needed here. We never merge the visibility | |
861 | attribute with the one from a dynamic object. */ | |
862 | if (bed->elf_backend_merge_symbol_attribute) | |
863 | (*bed->elf_backend_merge_symbol_attribute) (h, isym, definition, | |
864 | dynamic); | |
865 | ||
866 | /* If this symbol has default visibility and the user has requested | |
867 | we not re-export it, then mark it as hidden. */ | |
868 | if (definition | |
869 | && !dynamic | |
870 | && (abfd->no_export | |
871 | || (abfd->my_archive && abfd->my_archive->no_export)) | |
872 | && ELF_ST_VISIBILITY (isym->st_other) != STV_INTERNAL) | |
873 | isym->st_other = (STV_HIDDEN | |
874 | | (isym->st_other & ~ELF_ST_VISIBILITY (-1))); | |
875 | ||
876 | if (!dynamic && ELF_ST_VISIBILITY (isym->st_other) != 0) | |
877 | { | |
878 | unsigned char hvis, symvis, other, nvis; | |
879 | ||
880 | /* Only merge the visibility. Leave the remainder of the | |
881 | st_other field to elf_backend_merge_symbol_attribute. */ | |
882 | other = h->other & ~ELF_ST_VISIBILITY (-1); | |
883 | ||
884 | /* Combine visibilities, using the most constraining one. */ | |
885 | hvis = ELF_ST_VISIBILITY (h->other); | |
886 | symvis = ELF_ST_VISIBILITY (isym->st_other); | |
887 | if (! hvis) | |
888 | nvis = symvis; | |
889 | else if (! symvis) | |
890 | nvis = hvis; | |
891 | else | |
892 | nvis = hvis < symvis ? hvis : symvis; | |
893 | ||
894 | h->other = other | nvis; | |
895 | } | |
896 | } | |
897 | ||
4f3fedcf AM |
898 | /* This function is called when we want to merge a new symbol with an |
899 | existing symbol. It handles the various cases which arise when we | |
900 | find a definition in a dynamic object, or when there is already a | |
901 | definition in a dynamic object. The new symbol is described by | |
902 | NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table | |
903 | entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK | |
904 | if the old symbol was weak. We set POLD_ALIGNMENT to the alignment | |
905 | of an old common symbol. We set OVERRIDE if the old symbol is | |
906 | overriding a new definition. We set TYPE_CHANGE_OK if it is OK for | |
907 | the type to change. We set SIZE_CHANGE_OK if it is OK for the size | |
908 | to change. By OK to change, we mean that we shouldn't warn if the | |
909 | type or size does change. */ | |
45d6a902 | 910 | |
8a56bd02 | 911 | static bfd_boolean |
268b6b39 AM |
912 | _bfd_elf_merge_symbol (bfd *abfd, |
913 | struct bfd_link_info *info, | |
914 | const char *name, | |
915 | Elf_Internal_Sym *sym, | |
916 | asection **psec, | |
917 | bfd_vma *pvalue, | |
4f3fedcf AM |
918 | struct elf_link_hash_entry **sym_hash, |
919 | bfd **poldbfd, | |
37a9e49a | 920 | bfd_boolean *pold_weak, |
af44c138 | 921 | unsigned int *pold_alignment, |
268b6b39 AM |
922 | bfd_boolean *skip, |
923 | bfd_boolean *override, | |
924 | bfd_boolean *type_change_ok, | |
0f8a2703 | 925 | bfd_boolean *size_change_ok) |
252b5132 | 926 | { |
7479dfd4 | 927 | asection *sec, *oldsec; |
45d6a902 | 928 | struct elf_link_hash_entry *h; |
90c984fc | 929 | struct elf_link_hash_entry *hi; |
45d6a902 AM |
930 | struct elf_link_hash_entry *flip; |
931 | int bind; | |
932 | bfd *oldbfd; | |
933 | bfd_boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon; | |
0a36a439 | 934 | bfd_boolean newweak, oldweak, newfunc, oldfunc; |
a4d8e49b | 935 | const struct elf_backend_data *bed; |
45d6a902 AM |
936 | |
937 | *skip = FALSE; | |
938 | *override = FALSE; | |
939 | ||
940 | sec = *psec; | |
941 | bind = ELF_ST_BIND (sym->st_info); | |
942 | ||
943 | if (! bfd_is_und_section (sec)) | |
944 | h = elf_link_hash_lookup (elf_hash_table (info), name, TRUE, FALSE, FALSE); | |
945 | else | |
946 | h = ((struct elf_link_hash_entry *) | |
947 | bfd_wrapped_link_hash_lookup (abfd, info, name, TRUE, FALSE, FALSE)); | |
948 | if (h == NULL) | |
949 | return FALSE; | |
950 | *sym_hash = h; | |
252b5132 | 951 | |
88ba32a0 L |
952 | bed = get_elf_backend_data (abfd); |
953 | ||
90c984fc L |
954 | /* For merging, we only care about real symbols. But we need to make |
955 | sure that indirect symbol dynamic flags are updated. */ | |
956 | hi = h; | |
45d6a902 AM |
957 | while (h->root.type == bfd_link_hash_indirect |
958 | || h->root.type == bfd_link_hash_warning) | |
959 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
960 | ||
934bce08 AM |
961 | /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the |
962 | existing symbol. */ | |
963 | ||
964 | oldbfd = NULL; | |
965 | oldsec = NULL; | |
966 | switch (h->root.type) | |
967 | { | |
968 | default: | |
969 | break; | |
970 | ||
971 | case bfd_link_hash_undefined: | |
972 | case bfd_link_hash_undefweak: | |
973 | oldbfd = h->root.u.undef.abfd; | |
974 | break; | |
975 | ||
976 | case bfd_link_hash_defined: | |
977 | case bfd_link_hash_defweak: | |
978 | oldbfd = h->root.u.def.section->owner; | |
979 | oldsec = h->root.u.def.section; | |
980 | break; | |
981 | ||
982 | case bfd_link_hash_common: | |
983 | oldbfd = h->root.u.c.p->section->owner; | |
984 | oldsec = h->root.u.c.p->section; | |
985 | if (pold_alignment) | |
986 | *pold_alignment = h->root.u.c.p->alignment_power; | |
987 | break; | |
988 | } | |
989 | if (poldbfd && *poldbfd == NULL) | |
990 | *poldbfd = oldbfd; | |
991 | ||
992 | /* Differentiate strong and weak symbols. */ | |
993 | newweak = bind == STB_WEAK; | |
994 | oldweak = (h->root.type == bfd_link_hash_defweak | |
995 | || h->root.type == bfd_link_hash_undefweak); | |
996 | if (pold_weak) | |
997 | *pold_weak = oldweak; | |
998 | ||
999 | /* This code is for coping with dynamic objects, and is only useful | |
1000 | if we are doing an ELF link. */ | |
1001 | if (!(*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) | |
1002 | return TRUE; | |
1003 | ||
40b36307 | 1004 | /* We have to check it for every instance since the first few may be |
ee659f1f | 1005 | references and not all compilers emit symbol type for undefined |
40b36307 L |
1006 | symbols. */ |
1007 | bfd_elf_link_mark_dynamic_symbol (info, h, sym); | |
1008 | ||
ee659f1f AM |
1009 | /* NEWDYN and OLDDYN indicate whether the new or old symbol, |
1010 | respectively, is from a dynamic object. */ | |
1011 | ||
1012 | newdyn = (abfd->flags & DYNAMIC) != 0; | |
1013 | ||
1014 | /* ref_dynamic_nonweak and dynamic_def flags track actual undefined | |
1015 | syms and defined syms in dynamic libraries respectively. | |
1016 | ref_dynamic on the other hand can be set for a symbol defined in | |
1017 | a dynamic library, and def_dynamic may not be set; When the | |
1018 | definition in a dynamic lib is overridden by a definition in the | |
1019 | executable use of the symbol in the dynamic lib becomes a | |
1020 | reference to the executable symbol. */ | |
1021 | if (newdyn) | |
1022 | { | |
1023 | if (bfd_is_und_section (sec)) | |
1024 | { | |
1025 | if (bind != STB_WEAK) | |
1026 | { | |
1027 | h->ref_dynamic_nonweak = 1; | |
1028 | hi->ref_dynamic_nonweak = 1; | |
1029 | } | |
1030 | } | |
1031 | else | |
1032 | { | |
1033 | h->dynamic_def = 1; | |
1034 | hi->dynamic_def = 1; | |
1035 | } | |
1036 | } | |
1037 | ||
45d6a902 AM |
1038 | /* If we just created the symbol, mark it as being an ELF symbol. |
1039 | Other than that, there is nothing to do--there is no merge issue | |
1040 | with a newly defined symbol--so we just return. */ | |
1041 | ||
1042 | if (h->root.type == bfd_link_hash_new) | |
252b5132 | 1043 | { |
f5385ebf | 1044 | h->non_elf = 0; |
45d6a902 AM |
1045 | return TRUE; |
1046 | } | |
252b5132 | 1047 | |
45d6a902 AM |
1048 | /* In cases involving weak versioned symbols, we may wind up trying |
1049 | to merge a symbol with itself. Catch that here, to avoid the | |
1050 | confusion that results if we try to override a symbol with | |
1051 | itself. The additional tests catch cases like | |
1052 | _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a | |
1053 | dynamic object, which we do want to handle here. */ | |
1054 | if (abfd == oldbfd | |
895fa45f | 1055 | && (newweak || oldweak) |
45d6a902 | 1056 | && ((abfd->flags & DYNAMIC) == 0 |
f5385ebf | 1057 | || !h->def_regular)) |
45d6a902 AM |
1058 | return TRUE; |
1059 | ||
707bba77 | 1060 | olddyn = FALSE; |
45d6a902 AM |
1061 | if (oldbfd != NULL) |
1062 | olddyn = (oldbfd->flags & DYNAMIC) != 0; | |
707bba77 | 1063 | else if (oldsec != NULL) |
45d6a902 | 1064 | { |
707bba77 | 1065 | /* This handles the special SHN_MIPS_{TEXT,DATA} section |
45d6a902 | 1066 | indices used by MIPS ELF. */ |
707bba77 | 1067 | olddyn = (oldsec->symbol->flags & BSF_DYNAMIC) != 0; |
45d6a902 | 1068 | } |
252b5132 | 1069 | |
45d6a902 AM |
1070 | /* NEWDEF and OLDDEF indicate whether the new or old symbol, |
1071 | respectively, appear to be a definition rather than reference. */ | |
1072 | ||
707bba77 | 1073 | newdef = !bfd_is_und_section (sec) && !bfd_is_com_section (sec); |
45d6a902 | 1074 | |
707bba77 AM |
1075 | olddef = (h->root.type != bfd_link_hash_undefined |
1076 | && h->root.type != bfd_link_hash_undefweak | |
1077 | && h->root.type != bfd_link_hash_common); | |
45d6a902 | 1078 | |
0a36a439 L |
1079 | /* NEWFUNC and OLDFUNC indicate whether the new or old symbol, |
1080 | respectively, appear to be a function. */ | |
1081 | ||
1082 | newfunc = (ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1083 | && bed->is_function_type (ELF_ST_TYPE (sym->st_info))); | |
1084 | ||
1085 | oldfunc = (h->type != STT_NOTYPE | |
1086 | && bed->is_function_type (h->type)); | |
1087 | ||
580a2b6e L |
1088 | /* When we try to create a default indirect symbol from the dynamic |
1089 | definition with the default version, we skip it if its type and | |
40101021 | 1090 | the type of existing regular definition mismatch. */ |
580a2b6e | 1091 | if (pold_alignment == NULL |
580a2b6e L |
1092 | && newdyn |
1093 | && newdef | |
1094 | && !olddyn | |
4584ec12 L |
1095 | && (((olddef || h->root.type == bfd_link_hash_common) |
1096 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1097 | && ELF_ST_TYPE (sym->st_info) != STT_NOTYPE | |
1098 | && h->type != STT_NOTYPE | |
1099 | && !(newfunc && oldfunc)) | |
1100 | || (olddef | |
1101 | && ((h->type == STT_GNU_IFUNC) | |
1102 | != (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC))))) | |
580a2b6e L |
1103 | { |
1104 | *skip = TRUE; | |
1105 | return TRUE; | |
1106 | } | |
1107 | ||
3a5dbfb2 AM |
1108 | /* Plugin symbol type isn't currently set. Stop bogus errors. */ |
1109 | if (oldbfd != NULL && (oldbfd->flags & BFD_PLUGIN) != 0) | |
1110 | *type_change_ok = TRUE; | |
1111 | ||
68f49ba3 L |
1112 | /* Check TLS symbol. We don't check undefined symbol introduced by |
1113 | "ld -u". */ | |
3a5dbfb2 AM |
1114 | else if (oldbfd != NULL |
1115 | && ELF_ST_TYPE (sym->st_info) != h->type | |
1116 | && (ELF_ST_TYPE (sym->st_info) == STT_TLS || h->type == STT_TLS)) | |
7479dfd4 L |
1117 | { |
1118 | bfd *ntbfd, *tbfd; | |
1119 | bfd_boolean ntdef, tdef; | |
1120 | asection *ntsec, *tsec; | |
1121 | ||
1122 | if (h->type == STT_TLS) | |
1123 | { | |
3b36f7e6 | 1124 | ntbfd = abfd; |
7479dfd4 L |
1125 | ntsec = sec; |
1126 | ntdef = newdef; | |
1127 | tbfd = oldbfd; | |
1128 | tsec = oldsec; | |
1129 | tdef = olddef; | |
1130 | } | |
1131 | else | |
1132 | { | |
1133 | ntbfd = oldbfd; | |
1134 | ntsec = oldsec; | |
1135 | ntdef = olddef; | |
1136 | tbfd = abfd; | |
1137 | tsec = sec; | |
1138 | tdef = newdef; | |
1139 | } | |
1140 | ||
1141 | if (tdef && ntdef) | |
1142 | (*_bfd_error_handler) | |
191c0c42 AM |
1143 | (_("%s: TLS definition in %B section %A " |
1144 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1145 | tbfd, tsec, ntbfd, ntsec, h->root.root.string); |
1146 | else if (!tdef && !ntdef) | |
1147 | (*_bfd_error_handler) | |
191c0c42 AM |
1148 | (_("%s: TLS reference in %B " |
1149 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1150 | tbfd, ntbfd, h->root.root.string); |
1151 | else if (tdef) | |
1152 | (*_bfd_error_handler) | |
191c0c42 AM |
1153 | (_("%s: TLS definition in %B section %A " |
1154 | "mismatches non-TLS reference in %B"), | |
7479dfd4 L |
1155 | tbfd, tsec, ntbfd, h->root.root.string); |
1156 | else | |
1157 | (*_bfd_error_handler) | |
191c0c42 AM |
1158 | (_("%s: TLS reference in %B " |
1159 | "mismatches non-TLS definition in %B section %A"), | |
7479dfd4 L |
1160 | tbfd, ntbfd, ntsec, h->root.root.string); |
1161 | ||
1162 | bfd_set_error (bfd_error_bad_value); | |
1163 | return FALSE; | |
1164 | } | |
1165 | ||
45d6a902 AM |
1166 | /* If the old symbol has non-default visibility, we ignore the new |
1167 | definition from a dynamic object. */ | |
1168 | if (newdyn | |
9c7a29a3 | 1169 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 AM |
1170 | && !bfd_is_und_section (sec)) |
1171 | { | |
1172 | *skip = TRUE; | |
1173 | /* Make sure this symbol is dynamic. */ | |
f5385ebf | 1174 | h->ref_dynamic = 1; |
90c984fc | 1175 | hi->ref_dynamic = 1; |
45d6a902 AM |
1176 | /* A protected symbol has external availability. Make sure it is |
1177 | recorded as dynamic. | |
1178 | ||
1179 | FIXME: Should we check type and size for protected symbol? */ | |
1180 | if (ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
c152c796 | 1181 | return bfd_elf_link_record_dynamic_symbol (info, h); |
45d6a902 AM |
1182 | else |
1183 | return TRUE; | |
1184 | } | |
1185 | else if (!newdyn | |
9c7a29a3 | 1186 | && ELF_ST_VISIBILITY (sym->st_other) != STV_DEFAULT |
f5385ebf | 1187 | && h->def_dynamic) |
45d6a902 AM |
1188 | { |
1189 | /* If the new symbol with non-default visibility comes from a | |
1190 | relocatable file and the old definition comes from a dynamic | |
1191 | object, we remove the old definition. */ | |
6c9b78e6 | 1192 | if (hi->root.type == bfd_link_hash_indirect) |
d2dee3b2 L |
1193 | { |
1194 | /* Handle the case where the old dynamic definition is | |
1195 | default versioned. We need to copy the symbol info from | |
1196 | the symbol with default version to the normal one if it | |
1197 | was referenced before. */ | |
1198 | if (h->ref_regular) | |
1199 | { | |
6c9b78e6 | 1200 | hi->root.type = h->root.type; |
d2dee3b2 | 1201 | h->root.type = bfd_link_hash_indirect; |
6c9b78e6 | 1202 | (*bed->elf_backend_copy_indirect_symbol) (info, hi, h); |
aed81c4e | 1203 | |
6c9b78e6 | 1204 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; |
aed81c4e | 1205 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
d2dee3b2 | 1206 | { |
aed81c4e MR |
1207 | /* If the new symbol is hidden or internal, completely undo |
1208 | any dynamic link state. */ | |
1209 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1210 | h->forced_local = 0; | |
1211 | h->ref_dynamic = 0; | |
d2dee3b2 L |
1212 | } |
1213 | else | |
aed81c4e MR |
1214 | h->ref_dynamic = 1; |
1215 | ||
1216 | h->def_dynamic = 0; | |
aed81c4e MR |
1217 | /* FIXME: Should we check type and size for protected symbol? */ |
1218 | h->size = 0; | |
1219 | h->type = 0; | |
1220 | ||
6c9b78e6 | 1221 | h = hi; |
d2dee3b2 L |
1222 | } |
1223 | else | |
6c9b78e6 | 1224 | h = hi; |
d2dee3b2 | 1225 | } |
1de1a317 | 1226 | |
f5eda473 AM |
1227 | /* If the old symbol was undefined before, then it will still be |
1228 | on the undefs list. If the new symbol is undefined or | |
1229 | common, we can't make it bfd_link_hash_new here, because new | |
1230 | undefined or common symbols will be added to the undefs list | |
1231 | by _bfd_generic_link_add_one_symbol. Symbols may not be | |
1232 | added twice to the undefs list. Also, if the new symbol is | |
1233 | undefweak then we don't want to lose the strong undef. */ | |
1234 | if (h->root.u.undef.next || info->hash->undefs_tail == &h->root) | |
1de1a317 | 1235 | { |
1de1a317 | 1236 | h->root.type = bfd_link_hash_undefined; |
1de1a317 L |
1237 | h->root.u.undef.abfd = abfd; |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | h->root.type = bfd_link_hash_new; | |
1242 | h->root.u.undef.abfd = NULL; | |
1243 | } | |
1244 | ||
f5eda473 | 1245 | if (ELF_ST_VISIBILITY (sym->st_other) != STV_PROTECTED) |
252b5132 | 1246 | { |
f5eda473 AM |
1247 | /* If the new symbol is hidden or internal, completely undo |
1248 | any dynamic link state. */ | |
1249 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1250 | h->forced_local = 0; | |
1251 | h->ref_dynamic = 0; | |
45d6a902 | 1252 | } |
f5eda473 AM |
1253 | else |
1254 | h->ref_dynamic = 1; | |
1255 | h->def_dynamic = 0; | |
45d6a902 AM |
1256 | /* FIXME: Should we check type and size for protected symbol? */ |
1257 | h->size = 0; | |
1258 | h->type = 0; | |
1259 | return TRUE; | |
1260 | } | |
14a793b2 | 1261 | |
15b43f48 AM |
1262 | /* If a new weak symbol definition comes from a regular file and the |
1263 | old symbol comes from a dynamic library, we treat the new one as | |
1264 | strong. Similarly, an old weak symbol definition from a regular | |
1265 | file is treated as strong when the new symbol comes from a dynamic | |
1266 | library. Further, an old weak symbol from a dynamic library is | |
1267 | treated as strong if the new symbol is from a dynamic library. | |
1268 | This reflects the way glibc's ld.so works. | |
1269 | ||
1270 | Do this before setting *type_change_ok or *size_change_ok so that | |
1271 | we warn properly when dynamic library symbols are overridden. */ | |
1272 | ||
1273 | if (newdef && !newdyn && olddyn) | |
0f8a2703 | 1274 | newweak = FALSE; |
15b43f48 | 1275 | if (olddef && newdyn) |
0f8a2703 AM |
1276 | oldweak = FALSE; |
1277 | ||
d334575b | 1278 | /* Allow changes between different types of function symbol. */ |
0a36a439 | 1279 | if (newfunc && oldfunc) |
fcb93ecf PB |
1280 | *type_change_ok = TRUE; |
1281 | ||
79349b09 AM |
1282 | /* It's OK to change the type if either the existing symbol or the |
1283 | new symbol is weak. A type change is also OK if the old symbol | |
1284 | is undefined and the new symbol is defined. */ | |
252b5132 | 1285 | |
79349b09 AM |
1286 | if (oldweak |
1287 | || newweak | |
1288 | || (newdef | |
1289 | && h->root.type == bfd_link_hash_undefined)) | |
1290 | *type_change_ok = TRUE; | |
1291 | ||
1292 | /* It's OK to change the size if either the existing symbol or the | |
1293 | new symbol is weak, or if the old symbol is undefined. */ | |
1294 | ||
1295 | if (*type_change_ok | |
1296 | || h->root.type == bfd_link_hash_undefined) | |
1297 | *size_change_ok = TRUE; | |
45d6a902 | 1298 | |
45d6a902 AM |
1299 | /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old |
1300 | symbol, respectively, appears to be a common symbol in a dynamic | |
1301 | object. If a symbol appears in an uninitialized section, and is | |
1302 | not weak, and is not a function, then it may be a common symbol | |
1303 | which was resolved when the dynamic object was created. We want | |
1304 | to treat such symbols specially, because they raise special | |
1305 | considerations when setting the symbol size: if the symbol | |
1306 | appears as a common symbol in a regular object, and the size in | |
1307 | the regular object is larger, we must make sure that we use the | |
1308 | larger size. This problematic case can always be avoided in C, | |
1309 | but it must be handled correctly when using Fortran shared | |
1310 | libraries. | |
1311 | ||
1312 | Note that if NEWDYNCOMMON is set, NEWDEF will be set, and | |
1313 | likewise for OLDDYNCOMMON and OLDDEF. | |
1314 | ||
1315 | Note that this test is just a heuristic, and that it is quite | |
1316 | possible to have an uninitialized symbol in a shared object which | |
1317 | is really a definition, rather than a common symbol. This could | |
1318 | lead to some minor confusion when the symbol really is a common | |
1319 | symbol in some regular object. However, I think it will be | |
1320 | harmless. */ | |
1321 | ||
1322 | if (newdyn | |
1323 | && newdef | |
79349b09 | 1324 | && !newweak |
45d6a902 AM |
1325 | && (sec->flags & SEC_ALLOC) != 0 |
1326 | && (sec->flags & SEC_LOAD) == 0 | |
1327 | && sym->st_size > 0 | |
0a36a439 | 1328 | && !newfunc) |
45d6a902 AM |
1329 | newdyncommon = TRUE; |
1330 | else | |
1331 | newdyncommon = FALSE; | |
1332 | ||
1333 | if (olddyn | |
1334 | && olddef | |
1335 | && h->root.type == bfd_link_hash_defined | |
f5385ebf | 1336 | && h->def_dynamic |
45d6a902 AM |
1337 | && (h->root.u.def.section->flags & SEC_ALLOC) != 0 |
1338 | && (h->root.u.def.section->flags & SEC_LOAD) == 0 | |
1339 | && h->size > 0 | |
0a36a439 | 1340 | && !oldfunc) |
45d6a902 AM |
1341 | olddyncommon = TRUE; |
1342 | else | |
1343 | olddyncommon = FALSE; | |
1344 | ||
a4d8e49b L |
1345 | /* We now know everything about the old and new symbols. We ask the |
1346 | backend to check if we can merge them. */ | |
5d13b3b3 AM |
1347 | if (bed->merge_symbol != NULL) |
1348 | { | |
1349 | if (!bed->merge_symbol (h, sym, psec, newdef, olddef, oldbfd, oldsec)) | |
1350 | return FALSE; | |
1351 | sec = *psec; | |
1352 | } | |
a4d8e49b | 1353 | |
45d6a902 AM |
1354 | /* If both the old and the new symbols look like common symbols in a |
1355 | dynamic object, set the size of the symbol to the larger of the | |
1356 | two. */ | |
1357 | ||
1358 | if (olddyncommon | |
1359 | && newdyncommon | |
1360 | && sym->st_size != h->size) | |
1361 | { | |
1362 | /* Since we think we have two common symbols, issue a multiple | |
1363 | common warning if desired. Note that we only warn if the | |
1364 | size is different. If the size is the same, we simply let | |
1365 | the old symbol override the new one as normally happens with | |
1366 | symbols defined in dynamic objects. */ | |
1367 | ||
1368 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1369 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 | 1370 | return FALSE; |
252b5132 | 1371 | |
45d6a902 AM |
1372 | if (sym->st_size > h->size) |
1373 | h->size = sym->st_size; | |
252b5132 | 1374 | |
45d6a902 | 1375 | *size_change_ok = TRUE; |
252b5132 RH |
1376 | } |
1377 | ||
45d6a902 AM |
1378 | /* If we are looking at a dynamic object, and we have found a |
1379 | definition, we need to see if the symbol was already defined by | |
1380 | some other object. If so, we want to use the existing | |
1381 | definition, and we do not want to report a multiple symbol | |
1382 | definition error; we do this by clobbering *PSEC to be | |
1383 | bfd_und_section_ptr. | |
1384 | ||
1385 | We treat a common symbol as a definition if the symbol in the | |
1386 | shared library is a function, since common symbols always | |
1387 | represent variables; this can cause confusion in principle, but | |
1388 | any such confusion would seem to indicate an erroneous program or | |
1389 | shared library. We also permit a common symbol in a regular | |
79349b09 | 1390 | object to override a weak symbol in a shared object. */ |
45d6a902 AM |
1391 | |
1392 | if (newdyn | |
1393 | && newdef | |
77cfaee6 | 1394 | && (olddef |
45d6a902 | 1395 | || (h->root.type == bfd_link_hash_common |
0a36a439 | 1396 | && (newweak || newfunc)))) |
45d6a902 AM |
1397 | { |
1398 | *override = TRUE; | |
1399 | newdef = FALSE; | |
1400 | newdyncommon = FALSE; | |
252b5132 | 1401 | |
45d6a902 AM |
1402 | *psec = sec = bfd_und_section_ptr; |
1403 | *size_change_ok = TRUE; | |
252b5132 | 1404 | |
45d6a902 AM |
1405 | /* If we get here when the old symbol is a common symbol, then |
1406 | we are explicitly letting it override a weak symbol or | |
1407 | function in a dynamic object, and we don't want to warn about | |
1408 | a type change. If the old symbol is a defined symbol, a type | |
1409 | change warning may still be appropriate. */ | |
252b5132 | 1410 | |
45d6a902 AM |
1411 | if (h->root.type == bfd_link_hash_common) |
1412 | *type_change_ok = TRUE; | |
1413 | } | |
1414 | ||
1415 | /* Handle the special case of an old common symbol merging with a | |
1416 | new symbol which looks like a common symbol in a shared object. | |
1417 | We change *PSEC and *PVALUE to make the new symbol look like a | |
91134c82 L |
1418 | common symbol, and let _bfd_generic_link_add_one_symbol do the |
1419 | right thing. */ | |
45d6a902 AM |
1420 | |
1421 | if (newdyncommon | |
1422 | && h->root.type == bfd_link_hash_common) | |
1423 | { | |
1424 | *override = TRUE; | |
1425 | newdef = FALSE; | |
1426 | newdyncommon = FALSE; | |
1427 | *pvalue = sym->st_size; | |
a4d8e49b | 1428 | *psec = sec = bed->common_section (oldsec); |
45d6a902 AM |
1429 | *size_change_ok = TRUE; |
1430 | } | |
1431 | ||
c5e2cead | 1432 | /* Skip weak definitions of symbols that are already defined. */ |
f41d945b | 1433 | if (newdef && olddef && newweak) |
54ac0771 | 1434 | { |
35ed3f94 | 1435 | /* Don't skip new non-IR weak syms. */ |
3a5dbfb2 AM |
1436 | if (!(oldbfd != NULL |
1437 | && (oldbfd->flags & BFD_PLUGIN) != 0 | |
35ed3f94 | 1438 | && (abfd->flags & BFD_PLUGIN) == 0)) |
57fa7b8c AM |
1439 | { |
1440 | newdef = FALSE; | |
1441 | *skip = TRUE; | |
1442 | } | |
54ac0771 L |
1443 | |
1444 | /* Merge st_other. If the symbol already has a dynamic index, | |
1445 | but visibility says it should not be visible, turn it into a | |
1446 | local symbol. */ | |
1447 | elf_merge_st_other (abfd, h, sym, newdef, newdyn); | |
1448 | if (h->dynindx != -1) | |
1449 | switch (ELF_ST_VISIBILITY (h->other)) | |
1450 | { | |
1451 | case STV_INTERNAL: | |
1452 | case STV_HIDDEN: | |
1453 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
1454 | break; | |
1455 | } | |
1456 | } | |
c5e2cead | 1457 | |
45d6a902 AM |
1458 | /* If the old symbol is from a dynamic object, and the new symbol is |
1459 | a definition which is not from a dynamic object, then the new | |
1460 | symbol overrides the old symbol. Symbols from regular files | |
1461 | always take precedence over symbols from dynamic objects, even if | |
1462 | they are defined after the dynamic object in the link. | |
1463 | ||
1464 | As above, we again permit a common symbol in a regular object to | |
1465 | override a definition in a shared object if the shared object | |
0f8a2703 | 1466 | symbol is a function or is weak. */ |
45d6a902 AM |
1467 | |
1468 | flip = NULL; | |
77cfaee6 | 1469 | if (!newdyn |
45d6a902 AM |
1470 | && (newdef |
1471 | || (bfd_is_com_section (sec) | |
0a36a439 | 1472 | && (oldweak || oldfunc))) |
45d6a902 AM |
1473 | && olddyn |
1474 | && olddef | |
f5385ebf | 1475 | && h->def_dynamic) |
45d6a902 AM |
1476 | { |
1477 | /* Change the hash table entry to undefined, and let | |
1478 | _bfd_generic_link_add_one_symbol do the right thing with the | |
1479 | new definition. */ | |
1480 | ||
1481 | h->root.type = bfd_link_hash_undefined; | |
1482 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1483 | *size_change_ok = TRUE; | |
1484 | ||
1485 | olddef = FALSE; | |
1486 | olddyncommon = FALSE; | |
1487 | ||
1488 | /* We again permit a type change when a common symbol may be | |
1489 | overriding a function. */ | |
1490 | ||
1491 | if (bfd_is_com_section (sec)) | |
0a36a439 L |
1492 | { |
1493 | if (oldfunc) | |
1494 | { | |
1495 | /* If a common symbol overrides a function, make sure | |
1496 | that it isn't defined dynamically nor has type | |
1497 | function. */ | |
1498 | h->def_dynamic = 0; | |
1499 | h->type = STT_NOTYPE; | |
1500 | } | |
1501 | *type_change_ok = TRUE; | |
1502 | } | |
45d6a902 | 1503 | |
6c9b78e6 AM |
1504 | if (hi->root.type == bfd_link_hash_indirect) |
1505 | flip = hi; | |
45d6a902 AM |
1506 | else |
1507 | /* This union may have been set to be non-NULL when this symbol | |
1508 | was seen in a dynamic object. We must force the union to be | |
1509 | NULL, so that it is correct for a regular symbol. */ | |
1510 | h->verinfo.vertree = NULL; | |
1511 | } | |
1512 | ||
1513 | /* Handle the special case of a new common symbol merging with an | |
1514 | old symbol that looks like it might be a common symbol defined in | |
1515 | a shared object. Note that we have already handled the case in | |
1516 | which a new common symbol should simply override the definition | |
1517 | in the shared library. */ | |
1518 | ||
1519 | if (! newdyn | |
1520 | && bfd_is_com_section (sec) | |
1521 | && olddyncommon) | |
1522 | { | |
1523 | /* It would be best if we could set the hash table entry to a | |
1524 | common symbol, but we don't know what to use for the section | |
1525 | or the alignment. */ | |
1526 | if (! ((*info->callbacks->multiple_common) | |
24f58f47 | 1527 | (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) |
45d6a902 AM |
1528 | return FALSE; |
1529 | ||
4cc11e76 | 1530 | /* If the presumed common symbol in the dynamic object is |
45d6a902 AM |
1531 | larger, pretend that the new symbol has its size. */ |
1532 | ||
1533 | if (h->size > *pvalue) | |
1534 | *pvalue = h->size; | |
1535 | ||
af44c138 L |
1536 | /* We need to remember the alignment required by the symbol |
1537 | in the dynamic object. */ | |
1538 | BFD_ASSERT (pold_alignment); | |
1539 | *pold_alignment = h->root.u.def.section->alignment_power; | |
45d6a902 AM |
1540 | |
1541 | olddef = FALSE; | |
1542 | olddyncommon = FALSE; | |
1543 | ||
1544 | h->root.type = bfd_link_hash_undefined; | |
1545 | h->root.u.undef.abfd = h->root.u.def.section->owner; | |
1546 | ||
1547 | *size_change_ok = TRUE; | |
1548 | *type_change_ok = TRUE; | |
1549 | ||
6c9b78e6 AM |
1550 | if (hi->root.type == bfd_link_hash_indirect) |
1551 | flip = hi; | |
45d6a902 AM |
1552 | else |
1553 | h->verinfo.vertree = NULL; | |
1554 | } | |
1555 | ||
1556 | if (flip != NULL) | |
1557 | { | |
1558 | /* Handle the case where we had a versioned symbol in a dynamic | |
1559 | library and now find a definition in a normal object. In this | |
1560 | case, we make the versioned symbol point to the normal one. */ | |
45d6a902 | 1561 | flip->root.type = h->root.type; |
00cbee0a | 1562 | flip->root.u.undef.abfd = h->root.u.undef.abfd; |
45d6a902 AM |
1563 | h->root.type = bfd_link_hash_indirect; |
1564 | h->root.u.i.link = (struct bfd_link_hash_entry *) flip; | |
fcfa13d2 | 1565 | (*bed->elf_backend_copy_indirect_symbol) (info, flip, h); |
f5385ebf | 1566 | if (h->def_dynamic) |
45d6a902 | 1567 | { |
f5385ebf AM |
1568 | h->def_dynamic = 0; |
1569 | flip->ref_dynamic = 1; | |
45d6a902 AM |
1570 | } |
1571 | } | |
1572 | ||
45d6a902 AM |
1573 | return TRUE; |
1574 | } | |
1575 | ||
1576 | /* This function is called to create an indirect symbol from the | |
1577 | default for the symbol with the default version if needed. The | |
4f3fedcf | 1578 | symbol is described by H, NAME, SYM, SEC, and VALUE. We |
0f8a2703 | 1579 | set DYNSYM if the new indirect symbol is dynamic. */ |
45d6a902 | 1580 | |
28caa186 | 1581 | static bfd_boolean |
268b6b39 AM |
1582 | _bfd_elf_add_default_symbol (bfd *abfd, |
1583 | struct bfd_link_info *info, | |
1584 | struct elf_link_hash_entry *h, | |
1585 | const char *name, | |
1586 | Elf_Internal_Sym *sym, | |
4f3fedcf AM |
1587 | asection *sec, |
1588 | bfd_vma value, | |
1589 | bfd **poldbfd, | |
e3c9d234 | 1590 | bfd_boolean *dynsym) |
45d6a902 AM |
1591 | { |
1592 | bfd_boolean type_change_ok; | |
1593 | bfd_boolean size_change_ok; | |
1594 | bfd_boolean skip; | |
1595 | char *shortname; | |
1596 | struct elf_link_hash_entry *hi; | |
1597 | struct bfd_link_hash_entry *bh; | |
9c5bfbb7 | 1598 | const struct elf_backend_data *bed; |
45d6a902 AM |
1599 | bfd_boolean collect; |
1600 | bfd_boolean dynamic; | |
e3c9d234 | 1601 | bfd_boolean override; |
45d6a902 AM |
1602 | char *p; |
1603 | size_t len, shortlen; | |
ffd65175 | 1604 | asection *tmp_sec; |
45d6a902 AM |
1605 | |
1606 | /* If this symbol has a version, and it is the default version, we | |
1607 | create an indirect symbol from the default name to the fully | |
1608 | decorated name. This will cause external references which do not | |
1609 | specify a version to be bound to this version of the symbol. */ | |
1610 | p = strchr (name, ELF_VER_CHR); | |
1611 | if (p == NULL || p[1] != ELF_VER_CHR) | |
1612 | return TRUE; | |
1613 | ||
45d6a902 AM |
1614 | bed = get_elf_backend_data (abfd); |
1615 | collect = bed->collect; | |
1616 | dynamic = (abfd->flags & DYNAMIC) != 0; | |
1617 | ||
1618 | shortlen = p - name; | |
a50b1753 | 1619 | shortname = (char *) bfd_hash_allocate (&info->hash->table, shortlen + 1); |
45d6a902 AM |
1620 | if (shortname == NULL) |
1621 | return FALSE; | |
1622 | memcpy (shortname, name, shortlen); | |
1623 | shortname[shortlen] = '\0'; | |
1624 | ||
1625 | /* We are going to create a new symbol. Merge it with any existing | |
1626 | symbol with this name. For the purposes of the merge, act as | |
1627 | though we were defining the symbol we just defined, although we | |
1628 | actually going to define an indirect symbol. */ | |
1629 | type_change_ok = FALSE; | |
1630 | size_change_ok = FALSE; | |
ffd65175 AM |
1631 | tmp_sec = sec; |
1632 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
4f3fedcf | 1633 | &hi, poldbfd, NULL, NULL, &skip, &override, |
af44c138 | 1634 | &type_change_ok, &size_change_ok)) |
45d6a902 AM |
1635 | return FALSE; |
1636 | ||
1637 | if (skip) | |
1638 | goto nondefault; | |
1639 | ||
1640 | if (! override) | |
1641 | { | |
1642 | bh = &hi->root; | |
1643 | if (! (_bfd_generic_link_add_one_symbol | |
1644 | (info, abfd, shortname, BSF_INDIRECT, bfd_ind_section_ptr, | |
268b6b39 | 1645 | 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1646 | return FALSE; |
1647 | hi = (struct elf_link_hash_entry *) bh; | |
1648 | } | |
1649 | else | |
1650 | { | |
1651 | /* In this case the symbol named SHORTNAME is overriding the | |
1652 | indirect symbol we want to add. We were planning on making | |
1653 | SHORTNAME an indirect symbol referring to NAME. SHORTNAME | |
1654 | is the name without a version. NAME is the fully versioned | |
1655 | name, and it is the default version. | |
1656 | ||
1657 | Overriding means that we already saw a definition for the | |
1658 | symbol SHORTNAME in a regular object, and it is overriding | |
1659 | the symbol defined in the dynamic object. | |
1660 | ||
1661 | When this happens, we actually want to change NAME, the | |
1662 | symbol we just added, to refer to SHORTNAME. This will cause | |
1663 | references to NAME in the shared object to become references | |
1664 | to SHORTNAME in the regular object. This is what we expect | |
1665 | when we override a function in a shared object: that the | |
1666 | references in the shared object will be mapped to the | |
1667 | definition in the regular object. */ | |
1668 | ||
1669 | while (hi->root.type == bfd_link_hash_indirect | |
1670 | || hi->root.type == bfd_link_hash_warning) | |
1671 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1672 | ||
1673 | h->root.type = bfd_link_hash_indirect; | |
1674 | h->root.u.i.link = (struct bfd_link_hash_entry *) hi; | |
f5385ebf | 1675 | if (h->def_dynamic) |
45d6a902 | 1676 | { |
f5385ebf AM |
1677 | h->def_dynamic = 0; |
1678 | hi->ref_dynamic = 1; | |
1679 | if (hi->ref_regular | |
1680 | || hi->def_regular) | |
45d6a902 | 1681 | { |
c152c796 | 1682 | if (! bfd_elf_link_record_dynamic_symbol (info, hi)) |
45d6a902 AM |
1683 | return FALSE; |
1684 | } | |
1685 | } | |
1686 | ||
1687 | /* Now set HI to H, so that the following code will set the | |
1688 | other fields correctly. */ | |
1689 | hi = h; | |
1690 | } | |
1691 | ||
fab4a87f L |
1692 | /* Check if HI is a warning symbol. */ |
1693 | if (hi->root.type == bfd_link_hash_warning) | |
1694 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
1695 | ||
45d6a902 AM |
1696 | /* If there is a duplicate definition somewhere, then HI may not |
1697 | point to an indirect symbol. We will have reported an error to | |
1698 | the user in that case. */ | |
1699 | ||
1700 | if (hi->root.type == bfd_link_hash_indirect) | |
1701 | { | |
1702 | struct elf_link_hash_entry *ht; | |
1703 | ||
45d6a902 | 1704 | ht = (struct elf_link_hash_entry *) hi->root.u.i.link; |
fcfa13d2 | 1705 | (*bed->elf_backend_copy_indirect_symbol) (info, ht, hi); |
45d6a902 | 1706 | |
68c88cd4 AM |
1707 | /* A reference to the SHORTNAME symbol from a dynamic library |
1708 | will be satisfied by the versioned symbol at runtime. In | |
1709 | effect, we have a reference to the versioned symbol. */ | |
1710 | ht->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; | |
1711 | hi->dynamic_def |= ht->dynamic_def; | |
1712 | ||
45d6a902 AM |
1713 | /* See if the new flags lead us to realize that the symbol must |
1714 | be dynamic. */ | |
1715 | if (! *dynsym) | |
1716 | { | |
1717 | if (! dynamic) | |
1718 | { | |
ca4a656b | 1719 | if (! info->executable |
90c984fc | 1720 | || hi->def_dynamic |
f5385ebf | 1721 | || hi->ref_dynamic) |
45d6a902 AM |
1722 | *dynsym = TRUE; |
1723 | } | |
1724 | else | |
1725 | { | |
f5385ebf | 1726 | if (hi->ref_regular) |
45d6a902 AM |
1727 | *dynsym = TRUE; |
1728 | } | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | /* We also need to define an indirection from the nondefault version | |
1733 | of the symbol. */ | |
1734 | ||
1735 | nondefault: | |
1736 | len = strlen (name); | |
a50b1753 | 1737 | shortname = (char *) bfd_hash_allocate (&info->hash->table, len); |
45d6a902 AM |
1738 | if (shortname == NULL) |
1739 | return FALSE; | |
1740 | memcpy (shortname, name, shortlen); | |
1741 | memcpy (shortname + shortlen, p + 1, len - shortlen); | |
1742 | ||
1743 | /* Once again, merge with any existing symbol. */ | |
1744 | type_change_ok = FALSE; | |
1745 | size_change_ok = FALSE; | |
ffd65175 AM |
1746 | tmp_sec = sec; |
1747 | if (!_bfd_elf_merge_symbol (abfd, info, shortname, sym, &tmp_sec, &value, | |
115c6d5c | 1748 | &hi, poldbfd, NULL, NULL, &skip, &override, |
af44c138 | 1749 | &type_change_ok, &size_change_ok)) |
45d6a902 AM |
1750 | return FALSE; |
1751 | ||
1752 | if (skip) | |
1753 | return TRUE; | |
1754 | ||
1755 | if (override) | |
1756 | { | |
1757 | /* Here SHORTNAME is a versioned name, so we don't expect to see | |
1758 | the type of override we do in the case above unless it is | |
4cc11e76 | 1759 | overridden by a versioned definition. */ |
45d6a902 AM |
1760 | if (hi->root.type != bfd_link_hash_defined |
1761 | && hi->root.type != bfd_link_hash_defweak) | |
1762 | (*_bfd_error_handler) | |
d003868e AM |
1763 | (_("%B: unexpected redefinition of indirect versioned symbol `%s'"), |
1764 | abfd, shortname); | |
45d6a902 AM |
1765 | } |
1766 | else | |
1767 | { | |
1768 | bh = &hi->root; | |
1769 | if (! (_bfd_generic_link_add_one_symbol | |
1770 | (info, abfd, shortname, BSF_INDIRECT, | |
268b6b39 | 1771 | bfd_ind_section_ptr, 0, name, FALSE, collect, &bh))) |
45d6a902 AM |
1772 | return FALSE; |
1773 | hi = (struct elf_link_hash_entry *) bh; | |
1774 | ||
1775 | /* If there is a duplicate definition somewhere, then HI may not | |
1776 | point to an indirect symbol. We will have reported an error | |
1777 | to the user in that case. */ | |
1778 | ||
1779 | if (hi->root.type == bfd_link_hash_indirect) | |
1780 | { | |
fcfa13d2 | 1781 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
68c88cd4 AM |
1782 | h->ref_dynamic_nonweak |= hi->ref_dynamic_nonweak; |
1783 | hi->dynamic_def |= h->dynamic_def; | |
45d6a902 AM |
1784 | |
1785 | /* See if the new flags lead us to realize that the symbol | |
1786 | must be dynamic. */ | |
1787 | if (! *dynsym) | |
1788 | { | |
1789 | if (! dynamic) | |
1790 | { | |
ca4a656b | 1791 | if (! info->executable |
f5385ebf | 1792 | || hi->ref_dynamic) |
45d6a902 AM |
1793 | *dynsym = TRUE; |
1794 | } | |
1795 | else | |
1796 | { | |
f5385ebf | 1797 | if (hi->ref_regular) |
45d6a902 AM |
1798 | *dynsym = TRUE; |
1799 | } | |
1800 | } | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | return TRUE; | |
1805 | } | |
1806 | \f | |
1807 | /* This routine is used to export all defined symbols into the dynamic | |
1808 | symbol table. It is called via elf_link_hash_traverse. */ | |
1809 | ||
28caa186 | 1810 | static bfd_boolean |
268b6b39 | 1811 | _bfd_elf_export_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 1812 | { |
a50b1753 | 1813 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 AM |
1814 | |
1815 | /* Ignore indirect symbols. These are added by the versioning code. */ | |
1816 | if (h->root.type == bfd_link_hash_indirect) | |
1817 | return TRUE; | |
1818 | ||
7686d77d AM |
1819 | /* Ignore this if we won't export it. */ |
1820 | if (!eif->info->export_dynamic && !h->dynamic) | |
1821 | return TRUE; | |
45d6a902 AM |
1822 | |
1823 | if (h->dynindx == -1 | |
fd91d419 L |
1824 | && (h->def_regular || h->ref_regular) |
1825 | && ! bfd_hide_sym_by_version (eif->info->version_info, | |
1826 | h->root.root.string)) | |
45d6a902 | 1827 | { |
fd91d419 | 1828 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 | 1829 | { |
fd91d419 L |
1830 | eif->failed = TRUE; |
1831 | return FALSE; | |
45d6a902 AM |
1832 | } |
1833 | } | |
1834 | ||
1835 | return TRUE; | |
1836 | } | |
1837 | \f | |
1838 | /* Look through the symbols which are defined in other shared | |
1839 | libraries and referenced here. Update the list of version | |
1840 | dependencies. This will be put into the .gnu.version_r section. | |
1841 | This function is called via elf_link_hash_traverse. */ | |
1842 | ||
28caa186 | 1843 | static bfd_boolean |
268b6b39 AM |
1844 | _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry *h, |
1845 | void *data) | |
45d6a902 | 1846 | { |
a50b1753 | 1847 | struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data; |
45d6a902 AM |
1848 | Elf_Internal_Verneed *t; |
1849 | Elf_Internal_Vernaux *a; | |
1850 | bfd_size_type amt; | |
1851 | ||
45d6a902 AM |
1852 | /* We only care about symbols defined in shared objects with version |
1853 | information. */ | |
f5385ebf AM |
1854 | if (!h->def_dynamic |
1855 | || h->def_regular | |
45d6a902 AM |
1856 | || h->dynindx == -1 |
1857 | || h->verinfo.verdef == NULL) | |
1858 | return TRUE; | |
1859 | ||
1860 | /* See if we already know about this version. */ | |
28caa186 AM |
1861 | for (t = elf_tdata (rinfo->info->output_bfd)->verref; |
1862 | t != NULL; | |
1863 | t = t->vn_nextref) | |
45d6a902 AM |
1864 | { |
1865 | if (t->vn_bfd != h->verinfo.verdef->vd_bfd) | |
1866 | continue; | |
1867 | ||
1868 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
1869 | if (a->vna_nodename == h->verinfo.verdef->vd_nodename) | |
1870 | return TRUE; | |
1871 | ||
1872 | break; | |
1873 | } | |
1874 | ||
1875 | /* This is a new version. Add it to tree we are building. */ | |
1876 | ||
1877 | if (t == NULL) | |
1878 | { | |
1879 | amt = sizeof *t; | |
a50b1753 | 1880 | t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->info->output_bfd, amt); |
45d6a902 AM |
1881 | if (t == NULL) |
1882 | { | |
1883 | rinfo->failed = TRUE; | |
1884 | return FALSE; | |
1885 | } | |
1886 | ||
1887 | t->vn_bfd = h->verinfo.verdef->vd_bfd; | |
28caa186 AM |
1888 | t->vn_nextref = elf_tdata (rinfo->info->output_bfd)->verref; |
1889 | elf_tdata (rinfo->info->output_bfd)->verref = t; | |
45d6a902 AM |
1890 | } |
1891 | ||
1892 | amt = sizeof *a; | |
a50b1753 | 1893 | a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->info->output_bfd, amt); |
14b1c01e AM |
1894 | if (a == NULL) |
1895 | { | |
1896 | rinfo->failed = TRUE; | |
1897 | return FALSE; | |
1898 | } | |
45d6a902 AM |
1899 | |
1900 | /* Note that we are copying a string pointer here, and testing it | |
1901 | above. If bfd_elf_string_from_elf_section is ever changed to | |
1902 | discard the string data when low in memory, this will have to be | |
1903 | fixed. */ | |
1904 | a->vna_nodename = h->verinfo.verdef->vd_nodename; | |
1905 | ||
1906 | a->vna_flags = h->verinfo.verdef->vd_flags; | |
1907 | a->vna_nextptr = t->vn_auxptr; | |
1908 | ||
1909 | h->verinfo.verdef->vd_exp_refno = rinfo->vers; | |
1910 | ++rinfo->vers; | |
1911 | ||
1912 | a->vna_other = h->verinfo.verdef->vd_exp_refno + 1; | |
1913 | ||
1914 | t->vn_auxptr = a; | |
1915 | ||
1916 | return TRUE; | |
1917 | } | |
1918 | ||
1919 | /* Figure out appropriate versions for all the symbols. We may not | |
1920 | have the version number script until we have read all of the input | |
1921 | files, so until that point we don't know which symbols should be | |
1922 | local. This function is called via elf_link_hash_traverse. */ | |
1923 | ||
28caa186 | 1924 | static bfd_boolean |
268b6b39 | 1925 | _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 1926 | { |
28caa186 | 1927 | struct elf_info_failed *sinfo; |
45d6a902 | 1928 | struct bfd_link_info *info; |
9c5bfbb7 | 1929 | const struct elf_backend_data *bed; |
45d6a902 AM |
1930 | struct elf_info_failed eif; |
1931 | char *p; | |
1932 | bfd_size_type amt; | |
1933 | ||
a50b1753 | 1934 | sinfo = (struct elf_info_failed *) data; |
45d6a902 AM |
1935 | info = sinfo->info; |
1936 | ||
45d6a902 AM |
1937 | /* Fix the symbol flags. */ |
1938 | eif.failed = FALSE; | |
1939 | eif.info = info; | |
1940 | if (! _bfd_elf_fix_symbol_flags (h, &eif)) | |
1941 | { | |
1942 | if (eif.failed) | |
1943 | sinfo->failed = TRUE; | |
1944 | return FALSE; | |
1945 | } | |
1946 | ||
1947 | /* We only need version numbers for symbols defined in regular | |
1948 | objects. */ | |
f5385ebf | 1949 | if (!h->def_regular) |
45d6a902 AM |
1950 | return TRUE; |
1951 | ||
28caa186 | 1952 | bed = get_elf_backend_data (info->output_bfd); |
45d6a902 AM |
1953 | p = strchr (h->root.root.string, ELF_VER_CHR); |
1954 | if (p != NULL && h->verinfo.vertree == NULL) | |
1955 | { | |
1956 | struct bfd_elf_version_tree *t; | |
1957 | bfd_boolean hidden; | |
1958 | ||
1959 | hidden = TRUE; | |
1960 | ||
1961 | /* There are two consecutive ELF_VER_CHR characters if this is | |
1962 | not a hidden symbol. */ | |
1963 | ++p; | |
1964 | if (*p == ELF_VER_CHR) | |
1965 | { | |
1966 | hidden = FALSE; | |
1967 | ++p; | |
1968 | } | |
1969 | ||
1970 | /* If there is no version string, we can just return out. */ | |
1971 | if (*p == '\0') | |
1972 | { | |
1973 | if (hidden) | |
f5385ebf | 1974 | h->hidden = 1; |
45d6a902 AM |
1975 | return TRUE; |
1976 | } | |
1977 | ||
1978 | /* Look for the version. If we find it, it is no longer weak. */ | |
fd91d419 | 1979 | for (t = sinfo->info->version_info; t != NULL; t = t->next) |
45d6a902 AM |
1980 | { |
1981 | if (strcmp (t->name, p) == 0) | |
1982 | { | |
1983 | size_t len; | |
1984 | char *alc; | |
1985 | struct bfd_elf_version_expr *d; | |
1986 | ||
1987 | len = p - h->root.root.string; | |
a50b1753 | 1988 | alc = (char *) bfd_malloc (len); |
45d6a902 | 1989 | if (alc == NULL) |
14b1c01e AM |
1990 | { |
1991 | sinfo->failed = TRUE; | |
1992 | return FALSE; | |
1993 | } | |
45d6a902 AM |
1994 | memcpy (alc, h->root.root.string, len - 1); |
1995 | alc[len - 1] = '\0'; | |
1996 | if (alc[len - 2] == ELF_VER_CHR) | |
1997 | alc[len - 2] = '\0'; | |
1998 | ||
1999 | h->verinfo.vertree = t; | |
2000 | t->used = TRUE; | |
2001 | d = NULL; | |
2002 | ||
108ba305 JJ |
2003 | if (t->globals.list != NULL) |
2004 | d = (*t->match) (&t->globals, NULL, alc); | |
45d6a902 AM |
2005 | |
2006 | /* See if there is anything to force this symbol to | |
2007 | local scope. */ | |
108ba305 | 2008 | if (d == NULL && t->locals.list != NULL) |
45d6a902 | 2009 | { |
108ba305 JJ |
2010 | d = (*t->match) (&t->locals, NULL, alc); |
2011 | if (d != NULL | |
2012 | && h->dynindx != -1 | |
108ba305 JJ |
2013 | && ! info->export_dynamic) |
2014 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2015 | } |
2016 | ||
2017 | free (alc); | |
2018 | break; | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | /* If we are building an application, we need to create a | |
2023 | version node for this version. */ | |
36af4a4e | 2024 | if (t == NULL && info->executable) |
45d6a902 AM |
2025 | { |
2026 | struct bfd_elf_version_tree **pp; | |
2027 | int version_index; | |
2028 | ||
2029 | /* If we aren't going to export this symbol, we don't need | |
2030 | to worry about it. */ | |
2031 | if (h->dynindx == -1) | |
2032 | return TRUE; | |
2033 | ||
2034 | amt = sizeof *t; | |
a50b1753 | 2035 | t = (struct bfd_elf_version_tree *) bfd_zalloc (info->output_bfd, amt); |
45d6a902 AM |
2036 | if (t == NULL) |
2037 | { | |
2038 | sinfo->failed = TRUE; | |
2039 | return FALSE; | |
2040 | } | |
2041 | ||
45d6a902 | 2042 | t->name = p; |
45d6a902 AM |
2043 | t->name_indx = (unsigned int) -1; |
2044 | t->used = TRUE; | |
2045 | ||
2046 | version_index = 1; | |
2047 | /* Don't count anonymous version tag. */ | |
fd91d419 L |
2048 | if (sinfo->info->version_info != NULL |
2049 | && sinfo->info->version_info->vernum == 0) | |
45d6a902 | 2050 | version_index = 0; |
fd91d419 L |
2051 | for (pp = &sinfo->info->version_info; |
2052 | *pp != NULL; | |
2053 | pp = &(*pp)->next) | |
45d6a902 AM |
2054 | ++version_index; |
2055 | t->vernum = version_index; | |
2056 | ||
2057 | *pp = t; | |
2058 | ||
2059 | h->verinfo.vertree = t; | |
2060 | } | |
2061 | else if (t == NULL) | |
2062 | { | |
2063 | /* We could not find the version for a symbol when | |
2064 | generating a shared archive. Return an error. */ | |
2065 | (*_bfd_error_handler) | |
c55fe096 | 2066 | (_("%B: version node not found for symbol %s"), |
28caa186 | 2067 | info->output_bfd, h->root.root.string); |
45d6a902 AM |
2068 | bfd_set_error (bfd_error_bad_value); |
2069 | sinfo->failed = TRUE; | |
2070 | return FALSE; | |
2071 | } | |
2072 | ||
2073 | if (hidden) | |
f5385ebf | 2074 | h->hidden = 1; |
45d6a902 AM |
2075 | } |
2076 | ||
2077 | /* If we don't have a version for this symbol, see if we can find | |
2078 | something. */ | |
fd91d419 | 2079 | if (h->verinfo.vertree == NULL && sinfo->info->version_info != NULL) |
45d6a902 | 2080 | { |
1e8fa21e | 2081 | bfd_boolean hide; |
ae5a3597 | 2082 | |
fd91d419 L |
2083 | h->verinfo.vertree |
2084 | = bfd_find_version_for_sym (sinfo->info->version_info, | |
2085 | h->root.root.string, &hide); | |
1e8fa21e AM |
2086 | if (h->verinfo.vertree != NULL && hide) |
2087 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
45d6a902 AM |
2088 | } |
2089 | ||
2090 | return TRUE; | |
2091 | } | |
2092 | \f | |
45d6a902 AM |
2093 | /* Read and swap the relocs from the section indicated by SHDR. This |
2094 | may be either a REL or a RELA section. The relocations are | |
2095 | translated into RELA relocations and stored in INTERNAL_RELOCS, | |
2096 | which should have already been allocated to contain enough space. | |
2097 | The EXTERNAL_RELOCS are a buffer where the external form of the | |
2098 | relocations should be stored. | |
2099 | ||
2100 | Returns FALSE if something goes wrong. */ | |
2101 | ||
2102 | static bfd_boolean | |
268b6b39 | 2103 | elf_link_read_relocs_from_section (bfd *abfd, |
243ef1e0 | 2104 | asection *sec, |
268b6b39 AM |
2105 | Elf_Internal_Shdr *shdr, |
2106 | void *external_relocs, | |
2107 | Elf_Internal_Rela *internal_relocs) | |
45d6a902 | 2108 | { |
9c5bfbb7 | 2109 | const struct elf_backend_data *bed; |
268b6b39 | 2110 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); |
45d6a902 AM |
2111 | const bfd_byte *erela; |
2112 | const bfd_byte *erelaend; | |
2113 | Elf_Internal_Rela *irela; | |
243ef1e0 L |
2114 | Elf_Internal_Shdr *symtab_hdr; |
2115 | size_t nsyms; | |
45d6a902 | 2116 | |
45d6a902 AM |
2117 | /* Position ourselves at the start of the section. */ |
2118 | if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0) | |
2119 | return FALSE; | |
2120 | ||
2121 | /* Read the relocations. */ | |
2122 | if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size) | |
2123 | return FALSE; | |
2124 | ||
243ef1e0 | 2125 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
ce98a316 | 2126 | nsyms = NUM_SHDR_ENTRIES (symtab_hdr); |
243ef1e0 | 2127 | |
45d6a902 AM |
2128 | bed = get_elf_backend_data (abfd); |
2129 | ||
2130 | /* Convert the external relocations to the internal format. */ | |
2131 | if (shdr->sh_entsize == bed->s->sizeof_rel) | |
2132 | swap_in = bed->s->swap_reloc_in; | |
2133 | else if (shdr->sh_entsize == bed->s->sizeof_rela) | |
2134 | swap_in = bed->s->swap_reloca_in; | |
2135 | else | |
2136 | { | |
2137 | bfd_set_error (bfd_error_wrong_format); | |
2138 | return FALSE; | |
2139 | } | |
2140 | ||
a50b1753 | 2141 | erela = (const bfd_byte *) external_relocs; |
51992aec | 2142 | erelaend = erela + shdr->sh_size; |
45d6a902 AM |
2143 | irela = internal_relocs; |
2144 | while (erela < erelaend) | |
2145 | { | |
243ef1e0 L |
2146 | bfd_vma r_symndx; |
2147 | ||
45d6a902 | 2148 | (*swap_in) (abfd, erela, irela); |
243ef1e0 L |
2149 | r_symndx = ELF32_R_SYM (irela->r_info); |
2150 | if (bed->s->arch_size == 64) | |
2151 | r_symndx >>= 24; | |
ce98a316 NC |
2152 | if (nsyms > 0) |
2153 | { | |
2154 | if ((size_t) r_symndx >= nsyms) | |
2155 | { | |
2156 | (*_bfd_error_handler) | |
2157 | (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)" | |
2158 | " for offset 0x%lx in section `%A'"), | |
2159 | abfd, sec, | |
2160 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
2161 | bfd_set_error (bfd_error_bad_value); | |
2162 | return FALSE; | |
2163 | } | |
2164 | } | |
cf35638d | 2165 | else if (r_symndx != STN_UNDEF) |
243ef1e0 L |
2166 | { |
2167 | (*_bfd_error_handler) | |
ce98a316 NC |
2168 | (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'" |
2169 | " when the object file has no symbol table"), | |
d003868e AM |
2170 | abfd, sec, |
2171 | (unsigned long) r_symndx, (unsigned long) nsyms, irela->r_offset); | |
243ef1e0 L |
2172 | bfd_set_error (bfd_error_bad_value); |
2173 | return FALSE; | |
2174 | } | |
45d6a902 AM |
2175 | irela += bed->s->int_rels_per_ext_rel; |
2176 | erela += shdr->sh_entsize; | |
2177 | } | |
2178 | ||
2179 | return TRUE; | |
2180 | } | |
2181 | ||
2182 | /* Read and swap the relocs for a section O. They may have been | |
2183 | cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are | |
2184 | not NULL, they are used as buffers to read into. They are known to | |
2185 | be large enough. If the INTERNAL_RELOCS relocs argument is NULL, | |
2186 | the return value is allocated using either malloc or bfd_alloc, | |
2187 | according to the KEEP_MEMORY argument. If O has two relocation | |
2188 | sections (both REL and RELA relocations), then the REL_HDR | |
2189 | relocations will appear first in INTERNAL_RELOCS, followed by the | |
d4730f92 | 2190 | RELA_HDR relocations. */ |
45d6a902 AM |
2191 | |
2192 | Elf_Internal_Rela * | |
268b6b39 AM |
2193 | _bfd_elf_link_read_relocs (bfd *abfd, |
2194 | asection *o, | |
2195 | void *external_relocs, | |
2196 | Elf_Internal_Rela *internal_relocs, | |
2197 | bfd_boolean keep_memory) | |
45d6a902 | 2198 | { |
268b6b39 | 2199 | void *alloc1 = NULL; |
45d6a902 | 2200 | Elf_Internal_Rela *alloc2 = NULL; |
9c5bfbb7 | 2201 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
d4730f92 BS |
2202 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
2203 | Elf_Internal_Rela *internal_rela_relocs; | |
45d6a902 | 2204 | |
d4730f92 BS |
2205 | if (esdo->relocs != NULL) |
2206 | return esdo->relocs; | |
45d6a902 AM |
2207 | |
2208 | if (o->reloc_count == 0) | |
2209 | return NULL; | |
2210 | ||
45d6a902 AM |
2211 | if (internal_relocs == NULL) |
2212 | { | |
2213 | bfd_size_type size; | |
2214 | ||
2215 | size = o->reloc_count; | |
2216 | size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela); | |
2217 | if (keep_memory) | |
a50b1753 | 2218 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_alloc (abfd, size); |
45d6a902 | 2219 | else |
a50b1753 | 2220 | internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size); |
45d6a902 AM |
2221 | if (internal_relocs == NULL) |
2222 | goto error_return; | |
2223 | } | |
2224 | ||
2225 | if (external_relocs == NULL) | |
2226 | { | |
d4730f92 BS |
2227 | bfd_size_type size = 0; |
2228 | ||
2229 | if (esdo->rel.hdr) | |
2230 | size += esdo->rel.hdr->sh_size; | |
2231 | if (esdo->rela.hdr) | |
2232 | size += esdo->rela.hdr->sh_size; | |
45d6a902 | 2233 | |
268b6b39 | 2234 | alloc1 = bfd_malloc (size); |
45d6a902 AM |
2235 | if (alloc1 == NULL) |
2236 | goto error_return; | |
2237 | external_relocs = alloc1; | |
2238 | } | |
2239 | ||
d4730f92 BS |
2240 | internal_rela_relocs = internal_relocs; |
2241 | if (esdo->rel.hdr) | |
2242 | { | |
2243 | if (!elf_link_read_relocs_from_section (abfd, o, esdo->rel.hdr, | |
2244 | external_relocs, | |
2245 | internal_relocs)) | |
2246 | goto error_return; | |
2247 | external_relocs = (((bfd_byte *) external_relocs) | |
2248 | + esdo->rel.hdr->sh_size); | |
2249 | internal_rela_relocs += (NUM_SHDR_ENTRIES (esdo->rel.hdr) | |
2250 | * bed->s->int_rels_per_ext_rel); | |
2251 | } | |
2252 | ||
2253 | if (esdo->rela.hdr | |
2254 | && (!elf_link_read_relocs_from_section (abfd, o, esdo->rela.hdr, | |
2255 | external_relocs, | |
2256 | internal_rela_relocs))) | |
45d6a902 AM |
2257 | goto error_return; |
2258 | ||
2259 | /* Cache the results for next time, if we can. */ | |
2260 | if (keep_memory) | |
d4730f92 | 2261 | esdo->relocs = internal_relocs; |
45d6a902 AM |
2262 | |
2263 | if (alloc1 != NULL) | |
2264 | free (alloc1); | |
2265 | ||
2266 | /* Don't free alloc2, since if it was allocated we are passing it | |
2267 | back (under the name of internal_relocs). */ | |
2268 | ||
2269 | return internal_relocs; | |
2270 | ||
2271 | error_return: | |
2272 | if (alloc1 != NULL) | |
2273 | free (alloc1); | |
2274 | if (alloc2 != NULL) | |
4dd07732 AM |
2275 | { |
2276 | if (keep_memory) | |
2277 | bfd_release (abfd, alloc2); | |
2278 | else | |
2279 | free (alloc2); | |
2280 | } | |
45d6a902 AM |
2281 | return NULL; |
2282 | } | |
2283 | ||
2284 | /* Compute the size of, and allocate space for, REL_HDR which is the | |
2285 | section header for a section containing relocations for O. */ | |
2286 | ||
28caa186 | 2287 | static bfd_boolean |
268b6b39 | 2288 | _bfd_elf_link_size_reloc_section (bfd *abfd, |
d4730f92 | 2289 | struct bfd_elf_section_reloc_data *reldata) |
45d6a902 | 2290 | { |
d4730f92 | 2291 | Elf_Internal_Shdr *rel_hdr = reldata->hdr; |
45d6a902 AM |
2292 | |
2293 | /* That allows us to calculate the size of the section. */ | |
d4730f92 | 2294 | rel_hdr->sh_size = rel_hdr->sh_entsize * reldata->count; |
45d6a902 AM |
2295 | |
2296 | /* The contents field must last into write_object_contents, so we | |
2297 | allocate it with bfd_alloc rather than malloc. Also since we | |
2298 | cannot be sure that the contents will actually be filled in, | |
2299 | we zero the allocated space. */ | |
a50b1753 | 2300 | rel_hdr->contents = (unsigned char *) bfd_zalloc (abfd, rel_hdr->sh_size); |
45d6a902 AM |
2301 | if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0) |
2302 | return FALSE; | |
2303 | ||
d4730f92 | 2304 | if (reldata->hashes == NULL && reldata->count) |
45d6a902 AM |
2305 | { |
2306 | struct elf_link_hash_entry **p; | |
2307 | ||
a50b1753 | 2308 | p = (struct elf_link_hash_entry **) |
d4730f92 | 2309 | bfd_zmalloc (reldata->count * sizeof (struct elf_link_hash_entry *)); |
45d6a902 AM |
2310 | if (p == NULL) |
2311 | return FALSE; | |
2312 | ||
d4730f92 | 2313 | reldata->hashes = p; |
45d6a902 AM |
2314 | } |
2315 | ||
2316 | return TRUE; | |
2317 | } | |
2318 | ||
2319 | /* Copy the relocations indicated by the INTERNAL_RELOCS (which | |
2320 | originated from the section given by INPUT_REL_HDR) to the | |
2321 | OUTPUT_BFD. */ | |
2322 | ||
2323 | bfd_boolean | |
268b6b39 AM |
2324 | _bfd_elf_link_output_relocs (bfd *output_bfd, |
2325 | asection *input_section, | |
2326 | Elf_Internal_Shdr *input_rel_hdr, | |
eac338cf PB |
2327 | Elf_Internal_Rela *internal_relocs, |
2328 | struct elf_link_hash_entry **rel_hash | |
2329 | ATTRIBUTE_UNUSED) | |
45d6a902 AM |
2330 | { |
2331 | Elf_Internal_Rela *irela; | |
2332 | Elf_Internal_Rela *irelaend; | |
2333 | bfd_byte *erel; | |
d4730f92 | 2334 | struct bfd_elf_section_reloc_data *output_reldata; |
45d6a902 | 2335 | asection *output_section; |
9c5bfbb7 | 2336 | const struct elf_backend_data *bed; |
268b6b39 | 2337 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); |
d4730f92 | 2338 | struct bfd_elf_section_data *esdo; |
45d6a902 AM |
2339 | |
2340 | output_section = input_section->output_section; | |
45d6a902 | 2341 | |
d4730f92 BS |
2342 | bed = get_elf_backend_data (output_bfd); |
2343 | esdo = elf_section_data (output_section); | |
2344 | if (esdo->rel.hdr && esdo->rel.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2345 | { |
d4730f92 BS |
2346 | output_reldata = &esdo->rel; |
2347 | swap_out = bed->s->swap_reloc_out; | |
45d6a902 | 2348 | } |
d4730f92 BS |
2349 | else if (esdo->rela.hdr |
2350 | && esdo->rela.hdr->sh_entsize == input_rel_hdr->sh_entsize) | |
45d6a902 | 2351 | { |
d4730f92 BS |
2352 | output_reldata = &esdo->rela; |
2353 | swap_out = bed->s->swap_reloca_out; | |
45d6a902 AM |
2354 | } |
2355 | else | |
2356 | { | |
2357 | (*_bfd_error_handler) | |
d003868e AM |
2358 | (_("%B: relocation size mismatch in %B section %A"), |
2359 | output_bfd, input_section->owner, input_section); | |
297d8443 | 2360 | bfd_set_error (bfd_error_wrong_format); |
45d6a902 AM |
2361 | return FALSE; |
2362 | } | |
2363 | ||
d4730f92 BS |
2364 | erel = output_reldata->hdr->contents; |
2365 | erel += output_reldata->count * input_rel_hdr->sh_entsize; | |
45d6a902 AM |
2366 | irela = internal_relocs; |
2367 | irelaend = irela + (NUM_SHDR_ENTRIES (input_rel_hdr) | |
2368 | * bed->s->int_rels_per_ext_rel); | |
2369 | while (irela < irelaend) | |
2370 | { | |
2371 | (*swap_out) (output_bfd, irela, erel); | |
2372 | irela += bed->s->int_rels_per_ext_rel; | |
2373 | erel += input_rel_hdr->sh_entsize; | |
2374 | } | |
2375 | ||
2376 | /* Bump the counter, so that we know where to add the next set of | |
2377 | relocations. */ | |
d4730f92 | 2378 | output_reldata->count += NUM_SHDR_ENTRIES (input_rel_hdr); |
45d6a902 AM |
2379 | |
2380 | return TRUE; | |
2381 | } | |
2382 | \f | |
508c3946 L |
2383 | /* Make weak undefined symbols in PIE dynamic. */ |
2384 | ||
2385 | bfd_boolean | |
2386 | _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info *info, | |
2387 | struct elf_link_hash_entry *h) | |
2388 | { | |
2389 | if (info->pie | |
2390 | && h->dynindx == -1 | |
2391 | && h->root.type == bfd_link_hash_undefweak) | |
2392 | return bfd_elf_link_record_dynamic_symbol (info, h); | |
2393 | ||
2394 | return TRUE; | |
2395 | } | |
2396 | ||
45d6a902 AM |
2397 | /* Fix up the flags for a symbol. This handles various cases which |
2398 | can only be fixed after all the input files are seen. This is | |
2399 | currently called by both adjust_dynamic_symbol and | |
2400 | assign_sym_version, which is unnecessary but perhaps more robust in | |
2401 | the face of future changes. */ | |
2402 | ||
28caa186 | 2403 | static bfd_boolean |
268b6b39 AM |
2404 | _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry *h, |
2405 | struct elf_info_failed *eif) | |
45d6a902 | 2406 | { |
33774f08 | 2407 | const struct elf_backend_data *bed; |
508c3946 | 2408 | |
45d6a902 AM |
2409 | /* If this symbol was mentioned in a non-ELF file, try to set |
2410 | DEF_REGULAR and REF_REGULAR correctly. This is the only way to | |
2411 | permit a non-ELF file to correctly refer to a symbol defined in | |
2412 | an ELF dynamic object. */ | |
f5385ebf | 2413 | if (h->non_elf) |
45d6a902 AM |
2414 | { |
2415 | while (h->root.type == bfd_link_hash_indirect) | |
2416 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2417 | ||
2418 | if (h->root.type != bfd_link_hash_defined | |
2419 | && h->root.type != bfd_link_hash_defweak) | |
f5385ebf AM |
2420 | { |
2421 | h->ref_regular = 1; | |
2422 | h->ref_regular_nonweak = 1; | |
2423 | } | |
45d6a902 AM |
2424 | else |
2425 | { | |
2426 | if (h->root.u.def.section->owner != NULL | |
2427 | && (bfd_get_flavour (h->root.u.def.section->owner) | |
2428 | == bfd_target_elf_flavour)) | |
f5385ebf AM |
2429 | { |
2430 | h->ref_regular = 1; | |
2431 | h->ref_regular_nonweak = 1; | |
2432 | } | |
45d6a902 | 2433 | else |
f5385ebf | 2434 | h->def_regular = 1; |
45d6a902 AM |
2435 | } |
2436 | ||
2437 | if (h->dynindx == -1 | |
f5385ebf AM |
2438 | && (h->def_dynamic |
2439 | || h->ref_dynamic)) | |
45d6a902 | 2440 | { |
c152c796 | 2441 | if (! bfd_elf_link_record_dynamic_symbol (eif->info, h)) |
45d6a902 AM |
2442 | { |
2443 | eif->failed = TRUE; | |
2444 | return FALSE; | |
2445 | } | |
2446 | } | |
2447 | } | |
2448 | else | |
2449 | { | |
f5385ebf | 2450 | /* Unfortunately, NON_ELF is only correct if the symbol |
45d6a902 AM |
2451 | was first seen in a non-ELF file. Fortunately, if the symbol |
2452 | was first seen in an ELF file, we're probably OK unless the | |
2453 | symbol was defined in a non-ELF file. Catch that case here. | |
2454 | FIXME: We're still in trouble if the symbol was first seen in | |
2455 | a dynamic object, and then later in a non-ELF regular object. */ | |
2456 | if ((h->root.type == bfd_link_hash_defined | |
2457 | || h->root.type == bfd_link_hash_defweak) | |
f5385ebf | 2458 | && !h->def_regular |
45d6a902 AM |
2459 | && (h->root.u.def.section->owner != NULL |
2460 | ? (bfd_get_flavour (h->root.u.def.section->owner) | |
2461 | != bfd_target_elf_flavour) | |
2462 | : (bfd_is_abs_section (h->root.u.def.section) | |
f5385ebf AM |
2463 | && !h->def_dynamic))) |
2464 | h->def_regular = 1; | |
45d6a902 AM |
2465 | } |
2466 | ||
508c3946 | 2467 | /* Backend specific symbol fixup. */ |
33774f08 AM |
2468 | bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj); |
2469 | if (bed->elf_backend_fixup_symbol | |
2470 | && !(*bed->elf_backend_fixup_symbol) (eif->info, h)) | |
2471 | return FALSE; | |
508c3946 | 2472 | |
45d6a902 AM |
2473 | /* If this is a final link, and the symbol was defined as a common |
2474 | symbol in a regular object file, and there was no definition in | |
2475 | any dynamic object, then the linker will have allocated space for | |
f5385ebf | 2476 | the symbol in a common section but the DEF_REGULAR |
45d6a902 AM |
2477 | flag will not have been set. */ |
2478 | if (h->root.type == bfd_link_hash_defined | |
f5385ebf AM |
2479 | && !h->def_regular |
2480 | && h->ref_regular | |
2481 | && !h->def_dynamic | |
96f29d96 | 2482 | && (h->root.u.def.section->owner->flags & (DYNAMIC | BFD_PLUGIN)) == 0) |
f5385ebf | 2483 | h->def_regular = 1; |
45d6a902 AM |
2484 | |
2485 | /* If -Bsymbolic was used (which means to bind references to global | |
2486 | symbols to the definition within the shared object), and this | |
2487 | symbol was defined in a regular object, then it actually doesn't | |
9c7a29a3 AM |
2488 | need a PLT entry. Likewise, if the symbol has non-default |
2489 | visibility. If the symbol has hidden or internal visibility, we | |
c1be741f | 2490 | will force it local. */ |
f5385ebf | 2491 | if (h->needs_plt |
45d6a902 | 2492 | && eif->info->shared |
0eddce27 | 2493 | && is_elf_hash_table (eif->info->hash) |
55255dae | 2494 | && (SYMBOLIC_BIND (eif->info, h) |
c1be741f | 2495 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
f5385ebf | 2496 | && h->def_regular) |
45d6a902 | 2497 | { |
45d6a902 AM |
2498 | bfd_boolean force_local; |
2499 | ||
45d6a902 AM |
2500 | force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL |
2501 | || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN); | |
2502 | (*bed->elf_backend_hide_symbol) (eif->info, h, force_local); | |
2503 | } | |
2504 | ||
2505 | /* If a weak undefined symbol has non-default visibility, we also | |
2506 | hide it from the dynamic linker. */ | |
9c7a29a3 | 2507 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
45d6a902 | 2508 | && h->root.type == bfd_link_hash_undefweak) |
33774f08 | 2509 | (*bed->elf_backend_hide_symbol) (eif->info, h, TRUE); |
45d6a902 AM |
2510 | |
2511 | /* If this is a weak defined symbol in a dynamic object, and we know | |
2512 | the real definition in the dynamic object, copy interesting flags | |
2513 | over to the real definition. */ | |
f6e332e6 | 2514 | if (h->u.weakdef != NULL) |
45d6a902 | 2515 | { |
45d6a902 AM |
2516 | /* If the real definition is defined by a regular object file, |
2517 | don't do anything special. See the longer description in | |
2518 | _bfd_elf_adjust_dynamic_symbol, below. */ | |
4e6b54a6 | 2519 | if (h->u.weakdef->def_regular) |
f6e332e6 | 2520 | h->u.weakdef = NULL; |
45d6a902 | 2521 | else |
a26587ba | 2522 | { |
4e6b54a6 AM |
2523 | struct elf_link_hash_entry *weakdef = h->u.weakdef; |
2524 | ||
2525 | while (h->root.type == bfd_link_hash_indirect) | |
2526 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2527 | ||
2528 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
2529 | || h->root.type == bfd_link_hash_defweak); | |
2530 | BFD_ASSERT (weakdef->def_dynamic); | |
a26587ba RS |
2531 | BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined |
2532 | || weakdef->root.type == bfd_link_hash_defweak); | |
2533 | (*bed->elf_backend_copy_indirect_symbol) (eif->info, weakdef, h); | |
2534 | } | |
45d6a902 AM |
2535 | } |
2536 | ||
2537 | return TRUE; | |
2538 | } | |
2539 | ||
2540 | /* Make the backend pick a good value for a dynamic symbol. This is | |
2541 | called via elf_link_hash_traverse, and also calls itself | |
2542 | recursively. */ | |
2543 | ||
28caa186 | 2544 | static bfd_boolean |
268b6b39 | 2545 | _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry *h, void *data) |
45d6a902 | 2546 | { |
a50b1753 | 2547 | struct elf_info_failed *eif = (struct elf_info_failed *) data; |
45d6a902 | 2548 | bfd *dynobj; |
9c5bfbb7 | 2549 | const struct elf_backend_data *bed; |
45d6a902 | 2550 | |
0eddce27 | 2551 | if (! is_elf_hash_table (eif->info->hash)) |
45d6a902 AM |
2552 | return FALSE; |
2553 | ||
45d6a902 AM |
2554 | /* Ignore indirect symbols. These are added by the versioning code. */ |
2555 | if (h->root.type == bfd_link_hash_indirect) | |
2556 | return TRUE; | |
2557 | ||
2558 | /* Fix the symbol flags. */ | |
2559 | if (! _bfd_elf_fix_symbol_flags (h, eif)) | |
2560 | return FALSE; | |
2561 | ||
2562 | /* If this symbol does not require a PLT entry, and it is not | |
2563 | defined by a dynamic object, or is not referenced by a regular | |
2564 | object, ignore it. We do have to handle a weak defined symbol, | |
2565 | even if no regular object refers to it, if we decided to add it | |
2566 | to the dynamic symbol table. FIXME: Do we normally need to worry | |
2567 | about symbols which are defined by one dynamic object and | |
2568 | referenced by another one? */ | |
f5385ebf | 2569 | if (!h->needs_plt |
91e21fb7 | 2570 | && h->type != STT_GNU_IFUNC |
f5385ebf AM |
2571 | && (h->def_regular |
2572 | || !h->def_dynamic | |
2573 | || (!h->ref_regular | |
f6e332e6 | 2574 | && (h->u.weakdef == NULL || h->u.weakdef->dynindx == -1)))) |
45d6a902 | 2575 | { |
a6aa5195 | 2576 | h->plt = elf_hash_table (eif->info)->init_plt_offset; |
45d6a902 AM |
2577 | return TRUE; |
2578 | } | |
2579 | ||
2580 | /* If we've already adjusted this symbol, don't do it again. This | |
2581 | can happen via a recursive call. */ | |
f5385ebf | 2582 | if (h->dynamic_adjusted) |
45d6a902 AM |
2583 | return TRUE; |
2584 | ||
2585 | /* Don't look at this symbol again. Note that we must set this | |
2586 | after checking the above conditions, because we may look at a | |
2587 | symbol once, decide not to do anything, and then get called | |
2588 | recursively later after REF_REGULAR is set below. */ | |
f5385ebf | 2589 | h->dynamic_adjusted = 1; |
45d6a902 AM |
2590 | |
2591 | /* If this is a weak definition, and we know a real definition, and | |
2592 | the real symbol is not itself defined by a regular object file, | |
2593 | then get a good value for the real definition. We handle the | |
2594 | real symbol first, for the convenience of the backend routine. | |
2595 | ||
2596 | Note that there is a confusing case here. If the real definition | |
2597 | is defined by a regular object file, we don't get the real symbol | |
2598 | from the dynamic object, but we do get the weak symbol. If the | |
2599 | processor backend uses a COPY reloc, then if some routine in the | |
2600 | dynamic object changes the real symbol, we will not see that | |
2601 | change in the corresponding weak symbol. This is the way other | |
2602 | ELF linkers work as well, and seems to be a result of the shared | |
2603 | library model. | |
2604 | ||
2605 | I will clarify this issue. Most SVR4 shared libraries define the | |
2606 | variable _timezone and define timezone as a weak synonym. The | |
2607 | tzset call changes _timezone. If you write | |
2608 | extern int timezone; | |
2609 | int _timezone = 5; | |
2610 | int main () { tzset (); printf ("%d %d\n", timezone, _timezone); } | |
2611 | you might expect that, since timezone is a synonym for _timezone, | |
2612 | the same number will print both times. However, if the processor | |
2613 | backend uses a COPY reloc, then actually timezone will be copied | |
2614 | into your process image, and, since you define _timezone | |
2615 | yourself, _timezone will not. Thus timezone and _timezone will | |
2616 | wind up at different memory locations. The tzset call will set | |
2617 | _timezone, leaving timezone unchanged. */ | |
2618 | ||
f6e332e6 | 2619 | if (h->u.weakdef != NULL) |
45d6a902 | 2620 | { |
ec24dc88 AM |
2621 | /* If we get to this point, there is an implicit reference to |
2622 | H->U.WEAKDEF by a regular object file via the weak symbol H. */ | |
f6e332e6 | 2623 | h->u.weakdef->ref_regular = 1; |
45d6a902 | 2624 | |
ec24dc88 AM |
2625 | /* Ensure that the backend adjust_dynamic_symbol function sees |
2626 | H->U.WEAKDEF before H by recursively calling ourselves. */ | |
f6e332e6 | 2627 | if (! _bfd_elf_adjust_dynamic_symbol (h->u.weakdef, eif)) |
45d6a902 AM |
2628 | return FALSE; |
2629 | } | |
2630 | ||
2631 | /* If a symbol has no type and no size and does not require a PLT | |
2632 | entry, then we are probably about to do the wrong thing here: we | |
2633 | are probably going to create a COPY reloc for an empty object. | |
2634 | This case can arise when a shared object is built with assembly | |
2635 | code, and the assembly code fails to set the symbol type. */ | |
2636 | if (h->size == 0 | |
2637 | && h->type == STT_NOTYPE | |
f5385ebf | 2638 | && !h->needs_plt) |
45d6a902 AM |
2639 | (*_bfd_error_handler) |
2640 | (_("warning: type and size of dynamic symbol `%s' are not defined"), | |
2641 | h->root.root.string); | |
2642 | ||
2643 | dynobj = elf_hash_table (eif->info)->dynobj; | |
2644 | bed = get_elf_backend_data (dynobj); | |
e7c33416 | 2645 | |
45d6a902 AM |
2646 | if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h)) |
2647 | { | |
2648 | eif->failed = TRUE; | |
2649 | return FALSE; | |
2650 | } | |
2651 | ||
2652 | return TRUE; | |
2653 | } | |
2654 | ||
027297b7 L |
2655 | /* Adjust the dynamic symbol, H, for copy in the dynamic bss section, |
2656 | DYNBSS. */ | |
2657 | ||
2658 | bfd_boolean | |
2659 | _bfd_elf_adjust_dynamic_copy (struct elf_link_hash_entry *h, | |
2660 | asection *dynbss) | |
2661 | { | |
91ac5911 | 2662 | unsigned int power_of_two; |
027297b7 L |
2663 | bfd_vma mask; |
2664 | asection *sec = h->root.u.def.section; | |
2665 | ||
2666 | /* The section aligment of definition is the maximum alignment | |
91ac5911 L |
2667 | requirement of symbols defined in the section. Since we don't |
2668 | know the symbol alignment requirement, we start with the | |
2669 | maximum alignment and check low bits of the symbol address | |
2670 | for the minimum alignment. */ | |
2671 | power_of_two = bfd_get_section_alignment (sec->owner, sec); | |
2672 | mask = ((bfd_vma) 1 << power_of_two) - 1; | |
2673 | while ((h->root.u.def.value & mask) != 0) | |
2674 | { | |
2675 | mask >>= 1; | |
2676 | --power_of_two; | |
2677 | } | |
027297b7 | 2678 | |
91ac5911 L |
2679 | if (power_of_two > bfd_get_section_alignment (dynbss->owner, |
2680 | dynbss)) | |
027297b7 L |
2681 | { |
2682 | /* Adjust the section alignment if needed. */ | |
2683 | if (! bfd_set_section_alignment (dynbss->owner, dynbss, | |
91ac5911 | 2684 | power_of_two)) |
027297b7 L |
2685 | return FALSE; |
2686 | } | |
2687 | ||
91ac5911 | 2688 | /* We make sure that the symbol will be aligned properly. */ |
027297b7 L |
2689 | dynbss->size = BFD_ALIGN (dynbss->size, mask + 1); |
2690 | ||
2691 | /* Define the symbol as being at this point in DYNBSS. */ | |
2692 | h->root.u.def.section = dynbss; | |
2693 | h->root.u.def.value = dynbss->size; | |
2694 | ||
2695 | /* Increment the size of DYNBSS to make room for the symbol. */ | |
2696 | dynbss->size += h->size; | |
2697 | ||
2698 | return TRUE; | |
2699 | } | |
2700 | ||
45d6a902 AM |
2701 | /* Adjust all external symbols pointing into SEC_MERGE sections |
2702 | to reflect the object merging within the sections. */ | |
2703 | ||
28caa186 | 2704 | static bfd_boolean |
268b6b39 | 2705 | _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry *h, void *data) |
45d6a902 AM |
2706 | { |
2707 | asection *sec; | |
2708 | ||
45d6a902 AM |
2709 | if ((h->root.type == bfd_link_hash_defined |
2710 | || h->root.type == bfd_link_hash_defweak) | |
2711 | && ((sec = h->root.u.def.section)->flags & SEC_MERGE) | |
dbaa2011 | 2712 | && sec->sec_info_type == SEC_INFO_TYPE_MERGE) |
45d6a902 | 2713 | { |
a50b1753 | 2714 | bfd *output_bfd = (bfd *) data; |
45d6a902 AM |
2715 | |
2716 | h->root.u.def.value = | |
2717 | _bfd_merged_section_offset (output_bfd, | |
2718 | &h->root.u.def.section, | |
2719 | elf_section_data (sec)->sec_info, | |
753731ee | 2720 | h->root.u.def.value); |
45d6a902 AM |
2721 | } |
2722 | ||
2723 | return TRUE; | |
2724 | } | |
986a241f RH |
2725 | |
2726 | /* Returns false if the symbol referred to by H should be considered | |
2727 | to resolve local to the current module, and true if it should be | |
2728 | considered to bind dynamically. */ | |
2729 | ||
2730 | bfd_boolean | |
268b6b39 AM |
2731 | _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *h, |
2732 | struct bfd_link_info *info, | |
89a2ee5a | 2733 | bfd_boolean not_local_protected) |
986a241f RH |
2734 | { |
2735 | bfd_boolean binding_stays_local_p; | |
fcb93ecf PB |
2736 | const struct elf_backend_data *bed; |
2737 | struct elf_link_hash_table *hash_table; | |
986a241f RH |
2738 | |
2739 | if (h == NULL) | |
2740 | return FALSE; | |
2741 | ||
2742 | while (h->root.type == bfd_link_hash_indirect | |
2743 | || h->root.type == bfd_link_hash_warning) | |
2744 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2745 | ||
2746 | /* If it was forced local, then clearly it's not dynamic. */ | |
2747 | if (h->dynindx == -1) | |
2748 | return FALSE; | |
f5385ebf | 2749 | if (h->forced_local) |
986a241f RH |
2750 | return FALSE; |
2751 | ||
2752 | /* Identify the cases where name binding rules say that a | |
2753 | visible symbol resolves locally. */ | |
55255dae | 2754 | binding_stays_local_p = info->executable || SYMBOLIC_BIND (info, h); |
986a241f RH |
2755 | |
2756 | switch (ELF_ST_VISIBILITY (h->other)) | |
2757 | { | |
2758 | case STV_INTERNAL: | |
2759 | case STV_HIDDEN: | |
2760 | return FALSE; | |
2761 | ||
2762 | case STV_PROTECTED: | |
fcb93ecf PB |
2763 | hash_table = elf_hash_table (info); |
2764 | if (!is_elf_hash_table (hash_table)) | |
2765 | return FALSE; | |
2766 | ||
2767 | bed = get_elf_backend_data (hash_table->dynobj); | |
2768 | ||
986a241f RH |
2769 | /* Proper resolution for function pointer equality may require |
2770 | that these symbols perhaps be resolved dynamically, even though | |
2771 | we should be resolving them to the current module. */ | |
89a2ee5a | 2772 | if (!not_local_protected || !bed->is_function_type (h->type)) |
986a241f RH |
2773 | binding_stays_local_p = TRUE; |
2774 | break; | |
2775 | ||
2776 | default: | |
986a241f RH |
2777 | break; |
2778 | } | |
2779 | ||
aa37626c | 2780 | /* If it isn't defined locally, then clearly it's dynamic. */ |
89a2ee5a | 2781 | if (!h->def_regular && !ELF_COMMON_DEF_P (h)) |
aa37626c L |
2782 | return TRUE; |
2783 | ||
986a241f RH |
2784 | /* Otherwise, the symbol is dynamic if binding rules don't tell |
2785 | us that it remains local. */ | |
2786 | return !binding_stays_local_p; | |
2787 | } | |
f6c52c13 AM |
2788 | |
2789 | /* Return true if the symbol referred to by H should be considered | |
2790 | to resolve local to the current module, and false otherwise. Differs | |
2791 | from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of | |
2e76e85a | 2792 | undefined symbols. The two functions are virtually identical except |
89a2ee5a AM |
2793 | for the place where forced_local and dynindx == -1 are tested. If |
2794 | either of those tests are true, _bfd_elf_dynamic_symbol_p will say | |
2795 | the symbol is local, while _bfd_elf_symbol_refs_local_p will say | |
2796 | the symbol is local only for defined symbols. | |
2797 | It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as | |
2798 | !_bfd_elf_symbol_refs_local_p, except that targets differ in their | |
2799 | treatment of undefined weak symbols. For those that do not make | |
2800 | undefined weak symbols dynamic, both functions may return false. */ | |
f6c52c13 AM |
2801 | |
2802 | bfd_boolean | |
268b6b39 AM |
2803 | _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry *h, |
2804 | struct bfd_link_info *info, | |
2805 | bfd_boolean local_protected) | |
f6c52c13 | 2806 | { |
fcb93ecf PB |
2807 | const struct elf_backend_data *bed; |
2808 | struct elf_link_hash_table *hash_table; | |
2809 | ||
f6c52c13 AM |
2810 | /* If it's a local sym, of course we resolve locally. */ |
2811 | if (h == NULL) | |
2812 | return TRUE; | |
2813 | ||
d95edcac L |
2814 | /* STV_HIDDEN or STV_INTERNAL ones must be local. */ |
2815 | if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN | |
2816 | || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
2817 | return TRUE; | |
2818 | ||
7e2294f9 AO |
2819 | /* Common symbols that become definitions don't get the DEF_REGULAR |
2820 | flag set, so test it first, and don't bail out. */ | |
2821 | if (ELF_COMMON_DEF_P (h)) | |
2822 | /* Do nothing. */; | |
f6c52c13 | 2823 | /* If we don't have a definition in a regular file, then we can't |
49ff44d6 L |
2824 | resolve locally. The sym is either undefined or dynamic. */ |
2825 | else if (!h->def_regular) | |
f6c52c13 AM |
2826 | return FALSE; |
2827 | ||
2828 | /* Forced local symbols resolve locally. */ | |
f5385ebf | 2829 | if (h->forced_local) |
f6c52c13 AM |
2830 | return TRUE; |
2831 | ||
2832 | /* As do non-dynamic symbols. */ | |
2833 | if (h->dynindx == -1) | |
2834 | return TRUE; | |
2835 | ||
2836 | /* At this point, we know the symbol is defined and dynamic. In an | |
2837 | executable it must resolve locally, likewise when building symbolic | |
2838 | shared libraries. */ | |
55255dae | 2839 | if (info->executable || SYMBOLIC_BIND (info, h)) |
f6c52c13 AM |
2840 | return TRUE; |
2841 | ||
2842 | /* Now deal with defined dynamic symbols in shared libraries. Ones | |
2843 | with default visibility might not resolve locally. */ | |
2844 | if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2845 | return FALSE; | |
2846 | ||
fcb93ecf PB |
2847 | hash_table = elf_hash_table (info); |
2848 | if (!is_elf_hash_table (hash_table)) | |
2849 | return TRUE; | |
2850 | ||
2851 | bed = get_elf_backend_data (hash_table->dynobj); | |
2852 | ||
1c16dfa5 | 2853 | /* STV_PROTECTED non-function symbols are local. */ |
fcb93ecf | 2854 | if (!bed->is_function_type (h->type)) |
1c16dfa5 L |
2855 | return TRUE; |
2856 | ||
f6c52c13 | 2857 | /* Function pointer equality tests may require that STV_PROTECTED |
2676a7d9 AM |
2858 | symbols be treated as dynamic symbols. If the address of a |
2859 | function not defined in an executable is set to that function's | |
2860 | plt entry in the executable, then the address of the function in | |
2861 | a shared library must also be the plt entry in the executable. */ | |
f6c52c13 AM |
2862 | return local_protected; |
2863 | } | |
e1918d23 AM |
2864 | |
2865 | /* Caches some TLS segment info, and ensures that the TLS segment vma is | |
2866 | aligned. Returns the first TLS output section. */ | |
2867 | ||
2868 | struct bfd_section * | |
2869 | _bfd_elf_tls_setup (bfd *obfd, struct bfd_link_info *info) | |
2870 | { | |
2871 | struct bfd_section *sec, *tls; | |
2872 | unsigned int align = 0; | |
2873 | ||
2874 | for (sec = obfd->sections; sec != NULL; sec = sec->next) | |
2875 | if ((sec->flags & SEC_THREAD_LOCAL) != 0) | |
2876 | break; | |
2877 | tls = sec; | |
2878 | ||
2879 | for (; sec != NULL && (sec->flags & SEC_THREAD_LOCAL) != 0; sec = sec->next) | |
2880 | if (sec->alignment_power > align) | |
2881 | align = sec->alignment_power; | |
2882 | ||
2883 | elf_hash_table (info)->tls_sec = tls; | |
2884 | ||
2885 | /* Ensure the alignment of the first section is the largest alignment, | |
2886 | so that the tls segment starts aligned. */ | |
2887 | if (tls != NULL) | |
2888 | tls->alignment_power = align; | |
2889 | ||
2890 | return tls; | |
2891 | } | |
0ad989f9 L |
2892 | |
2893 | /* Return TRUE iff this is a non-common, definition of a non-function symbol. */ | |
2894 | static bfd_boolean | |
2895 | is_global_data_symbol_definition (bfd *abfd ATTRIBUTE_UNUSED, | |
2896 | Elf_Internal_Sym *sym) | |
2897 | { | |
a4d8e49b L |
2898 | const struct elf_backend_data *bed; |
2899 | ||
0ad989f9 L |
2900 | /* Local symbols do not count, but target specific ones might. */ |
2901 | if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL | |
2902 | && ELF_ST_BIND (sym->st_info) < STB_LOOS) | |
2903 | return FALSE; | |
2904 | ||
fcb93ecf | 2905 | bed = get_elf_backend_data (abfd); |
0ad989f9 | 2906 | /* Function symbols do not count. */ |
fcb93ecf | 2907 | if (bed->is_function_type (ELF_ST_TYPE (sym->st_info))) |
0ad989f9 L |
2908 | return FALSE; |
2909 | ||
2910 | /* If the section is undefined, then so is the symbol. */ | |
2911 | if (sym->st_shndx == SHN_UNDEF) | |
2912 | return FALSE; | |
2913 | ||
2914 | /* If the symbol is defined in the common section, then | |
2915 | it is a common definition and so does not count. */ | |
a4d8e49b | 2916 | if (bed->common_definition (sym)) |
0ad989f9 L |
2917 | return FALSE; |
2918 | ||
2919 | /* If the symbol is in a target specific section then we | |
2920 | must rely upon the backend to tell us what it is. */ | |
2921 | if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS) | |
2922 | /* FIXME - this function is not coded yet: | |
2923 | ||
2924 | return _bfd_is_global_symbol_definition (abfd, sym); | |
2925 | ||
2926 | Instead for now assume that the definition is not global, | |
2927 | Even if this is wrong, at least the linker will behave | |
2928 | in the same way that it used to do. */ | |
2929 | return FALSE; | |
2930 | ||
2931 | return TRUE; | |
2932 | } | |
2933 | ||
2934 | /* Search the symbol table of the archive element of the archive ABFD | |
2935 | whose archive map contains a mention of SYMDEF, and determine if | |
2936 | the symbol is defined in this element. */ | |
2937 | static bfd_boolean | |
2938 | elf_link_is_defined_archive_symbol (bfd * abfd, carsym * symdef) | |
2939 | { | |
2940 | Elf_Internal_Shdr * hdr; | |
2941 | bfd_size_type symcount; | |
2942 | bfd_size_type extsymcount; | |
2943 | bfd_size_type extsymoff; | |
2944 | Elf_Internal_Sym *isymbuf; | |
2945 | Elf_Internal_Sym *isym; | |
2946 | Elf_Internal_Sym *isymend; | |
2947 | bfd_boolean result; | |
2948 | ||
2949 | abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
2950 | if (abfd == NULL) | |
2951 | return FALSE; | |
2952 | ||
2953 | if (! bfd_check_format (abfd, bfd_object)) | |
2954 | return FALSE; | |
2955 | ||
2956 | /* If we have already included the element containing this symbol in the | |
2957 | link then we do not need to include it again. Just claim that any symbol | |
2958 | it contains is not a definition, so that our caller will not decide to | |
2959 | (re)include this element. */ | |
2960 | if (abfd->archive_pass) | |
2961 | return FALSE; | |
2962 | ||
2963 | /* Select the appropriate symbol table. */ | |
2964 | if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0) | |
2965 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
2966 | else | |
2967 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
2968 | ||
2969 | symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym; | |
2970 | ||
2971 | /* The sh_info field of the symtab header tells us where the | |
2972 | external symbols start. We don't care about the local symbols. */ | |
2973 | if (elf_bad_symtab (abfd)) | |
2974 | { | |
2975 | extsymcount = symcount; | |
2976 | extsymoff = 0; | |
2977 | } | |
2978 | else | |
2979 | { | |
2980 | extsymcount = symcount - hdr->sh_info; | |
2981 | extsymoff = hdr->sh_info; | |
2982 | } | |
2983 | ||
2984 | if (extsymcount == 0) | |
2985 | return FALSE; | |
2986 | ||
2987 | /* Read in the symbol table. */ | |
2988 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
2989 | NULL, NULL, NULL); | |
2990 | if (isymbuf == NULL) | |
2991 | return FALSE; | |
2992 | ||
2993 | /* Scan the symbol table looking for SYMDEF. */ | |
2994 | result = FALSE; | |
2995 | for (isym = isymbuf, isymend = isymbuf + extsymcount; isym < isymend; isym++) | |
2996 | { | |
2997 | const char *name; | |
2998 | ||
2999 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3000 | isym->st_name); | |
3001 | if (name == NULL) | |
3002 | break; | |
3003 | ||
3004 | if (strcmp (name, symdef->name) == 0) | |
3005 | { | |
3006 | result = is_global_data_symbol_definition (abfd, isym); | |
3007 | break; | |
3008 | } | |
3009 | } | |
3010 | ||
3011 | free (isymbuf); | |
3012 | ||
3013 | return result; | |
3014 | } | |
3015 | \f | |
5a580b3a AM |
3016 | /* Add an entry to the .dynamic table. */ |
3017 | ||
3018 | bfd_boolean | |
3019 | _bfd_elf_add_dynamic_entry (struct bfd_link_info *info, | |
3020 | bfd_vma tag, | |
3021 | bfd_vma val) | |
3022 | { | |
3023 | struct elf_link_hash_table *hash_table; | |
3024 | const struct elf_backend_data *bed; | |
3025 | asection *s; | |
3026 | bfd_size_type newsize; | |
3027 | bfd_byte *newcontents; | |
3028 | Elf_Internal_Dyn dyn; | |
3029 | ||
3030 | hash_table = elf_hash_table (info); | |
3031 | if (! is_elf_hash_table (hash_table)) | |
3032 | return FALSE; | |
3033 | ||
3034 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3035 | s = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
5a580b3a AM |
3036 | BFD_ASSERT (s != NULL); |
3037 | ||
eea6121a | 3038 | newsize = s->size + bed->s->sizeof_dyn; |
a50b1753 | 3039 | newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize); |
5a580b3a AM |
3040 | if (newcontents == NULL) |
3041 | return FALSE; | |
3042 | ||
3043 | dyn.d_tag = tag; | |
3044 | dyn.d_un.d_val = val; | |
eea6121a | 3045 | bed->s->swap_dyn_out (hash_table->dynobj, &dyn, newcontents + s->size); |
5a580b3a | 3046 | |
eea6121a | 3047 | s->size = newsize; |
5a580b3a AM |
3048 | s->contents = newcontents; |
3049 | ||
3050 | return TRUE; | |
3051 | } | |
3052 | ||
3053 | /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true, | |
3054 | otherwise just check whether one already exists. Returns -1 on error, | |
3055 | 1 if a DT_NEEDED tag already exists, and 0 on success. */ | |
3056 | ||
4ad4eba5 | 3057 | static int |
7e9f0867 AM |
3058 | elf_add_dt_needed_tag (bfd *abfd, |
3059 | struct bfd_link_info *info, | |
4ad4eba5 AM |
3060 | const char *soname, |
3061 | bfd_boolean do_it) | |
5a580b3a AM |
3062 | { |
3063 | struct elf_link_hash_table *hash_table; | |
5a580b3a AM |
3064 | bfd_size_type strindex; |
3065 | ||
7e9f0867 AM |
3066 | if (!_bfd_elf_link_create_dynstrtab (abfd, info)) |
3067 | return -1; | |
3068 | ||
5a580b3a | 3069 | hash_table = elf_hash_table (info); |
5a580b3a AM |
3070 | strindex = _bfd_elf_strtab_add (hash_table->dynstr, soname, FALSE); |
3071 | if (strindex == (bfd_size_type) -1) | |
3072 | return -1; | |
3073 | ||
02be4619 | 3074 | if (_bfd_elf_strtab_refcount (hash_table->dynstr, strindex) != 1) |
5a580b3a AM |
3075 | { |
3076 | asection *sdyn; | |
3077 | const struct elf_backend_data *bed; | |
3078 | bfd_byte *extdyn; | |
3079 | ||
3080 | bed = get_elf_backend_data (hash_table->dynobj); | |
3d4d4302 | 3081 | sdyn = bfd_get_linker_section (hash_table->dynobj, ".dynamic"); |
7e9f0867 AM |
3082 | if (sdyn != NULL) |
3083 | for (extdyn = sdyn->contents; | |
3084 | extdyn < sdyn->contents + sdyn->size; | |
3085 | extdyn += bed->s->sizeof_dyn) | |
3086 | { | |
3087 | Elf_Internal_Dyn dyn; | |
5a580b3a | 3088 | |
7e9f0867 AM |
3089 | bed->s->swap_dyn_in (hash_table->dynobj, extdyn, &dyn); |
3090 | if (dyn.d_tag == DT_NEEDED | |
3091 | && dyn.d_un.d_val == strindex) | |
3092 | { | |
3093 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3094 | return 1; | |
3095 | } | |
3096 | } | |
5a580b3a AM |
3097 | } |
3098 | ||
3099 | if (do_it) | |
3100 | { | |
7e9f0867 AM |
3101 | if (!_bfd_elf_link_create_dynamic_sections (hash_table->dynobj, info)) |
3102 | return -1; | |
3103 | ||
5a580b3a AM |
3104 | if (!_bfd_elf_add_dynamic_entry (info, DT_NEEDED, strindex)) |
3105 | return -1; | |
3106 | } | |
3107 | else | |
3108 | /* We were just checking for existence of the tag. */ | |
3109 | _bfd_elf_strtab_delref (hash_table->dynstr, strindex); | |
3110 | ||
3111 | return 0; | |
3112 | } | |
3113 | ||
010e5ae2 AM |
3114 | static bfd_boolean |
3115 | on_needed_list (const char *soname, struct bfd_link_needed_list *needed) | |
3116 | { | |
3117 | for (; needed != NULL; needed = needed->next) | |
3118 | if (strcmp (soname, needed->name) == 0) | |
3119 | return TRUE; | |
3120 | ||
3121 | return FALSE; | |
3122 | } | |
3123 | ||
14160578 | 3124 | /* Sort symbol by value, section, and size. */ |
4ad4eba5 AM |
3125 | static int |
3126 | elf_sort_symbol (const void *arg1, const void *arg2) | |
5a580b3a AM |
3127 | { |
3128 | const struct elf_link_hash_entry *h1; | |
3129 | const struct elf_link_hash_entry *h2; | |
10b7e05b | 3130 | bfd_signed_vma vdiff; |
5a580b3a AM |
3131 | |
3132 | h1 = *(const struct elf_link_hash_entry **) arg1; | |
3133 | h2 = *(const struct elf_link_hash_entry **) arg2; | |
10b7e05b NC |
3134 | vdiff = h1->root.u.def.value - h2->root.u.def.value; |
3135 | if (vdiff != 0) | |
3136 | return vdiff > 0 ? 1 : -1; | |
3137 | else | |
3138 | { | |
3139 | long sdiff = h1->root.u.def.section->id - h2->root.u.def.section->id; | |
3140 | if (sdiff != 0) | |
3141 | return sdiff > 0 ? 1 : -1; | |
3142 | } | |
14160578 AM |
3143 | vdiff = h1->size - h2->size; |
3144 | return vdiff == 0 ? 0 : vdiff > 0 ? 1 : -1; | |
5a580b3a | 3145 | } |
4ad4eba5 | 3146 | |
5a580b3a AM |
3147 | /* This function is used to adjust offsets into .dynstr for |
3148 | dynamic symbols. This is called via elf_link_hash_traverse. */ | |
3149 | ||
3150 | static bfd_boolean | |
3151 | elf_adjust_dynstr_offsets (struct elf_link_hash_entry *h, void *data) | |
3152 | { | |
a50b1753 | 3153 | struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data; |
5a580b3a | 3154 | |
5a580b3a AM |
3155 | if (h->dynindx != -1) |
3156 | h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index); | |
3157 | return TRUE; | |
3158 | } | |
3159 | ||
3160 | /* Assign string offsets in .dynstr, update all structures referencing | |
3161 | them. */ | |
3162 | ||
4ad4eba5 AM |
3163 | static bfd_boolean |
3164 | elf_finalize_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
5a580b3a AM |
3165 | { |
3166 | struct elf_link_hash_table *hash_table = elf_hash_table (info); | |
3167 | struct elf_link_local_dynamic_entry *entry; | |
3168 | struct elf_strtab_hash *dynstr = hash_table->dynstr; | |
3169 | bfd *dynobj = hash_table->dynobj; | |
3170 | asection *sdyn; | |
3171 | bfd_size_type size; | |
3172 | const struct elf_backend_data *bed; | |
3173 | bfd_byte *extdyn; | |
3174 | ||
3175 | _bfd_elf_strtab_finalize (dynstr); | |
3176 | size = _bfd_elf_strtab_size (dynstr); | |
3177 | ||
3178 | bed = get_elf_backend_data (dynobj); | |
3d4d4302 | 3179 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
5a580b3a AM |
3180 | BFD_ASSERT (sdyn != NULL); |
3181 | ||
3182 | /* Update all .dynamic entries referencing .dynstr strings. */ | |
3183 | for (extdyn = sdyn->contents; | |
eea6121a | 3184 | extdyn < sdyn->contents + sdyn->size; |
5a580b3a AM |
3185 | extdyn += bed->s->sizeof_dyn) |
3186 | { | |
3187 | Elf_Internal_Dyn dyn; | |
3188 | ||
3189 | bed->s->swap_dyn_in (dynobj, extdyn, &dyn); | |
3190 | switch (dyn.d_tag) | |
3191 | { | |
3192 | case DT_STRSZ: | |
3193 | dyn.d_un.d_val = size; | |
3194 | break; | |
3195 | case DT_NEEDED: | |
3196 | case DT_SONAME: | |
3197 | case DT_RPATH: | |
3198 | case DT_RUNPATH: | |
3199 | case DT_FILTER: | |
3200 | case DT_AUXILIARY: | |
7ee314fa AM |
3201 | case DT_AUDIT: |
3202 | case DT_DEPAUDIT: | |
5a580b3a AM |
3203 | dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val); |
3204 | break; | |
3205 | default: | |
3206 | continue; | |
3207 | } | |
3208 | bed->s->swap_dyn_out (dynobj, &dyn, extdyn); | |
3209 | } | |
3210 | ||
3211 | /* Now update local dynamic symbols. */ | |
3212 | for (entry = hash_table->dynlocal; entry ; entry = entry->next) | |
3213 | entry->isym.st_name = _bfd_elf_strtab_offset (dynstr, | |
3214 | entry->isym.st_name); | |
3215 | ||
3216 | /* And the rest of dynamic symbols. */ | |
3217 | elf_link_hash_traverse (hash_table, elf_adjust_dynstr_offsets, dynstr); | |
3218 | ||
3219 | /* Adjust version definitions. */ | |
3220 | if (elf_tdata (output_bfd)->cverdefs) | |
3221 | { | |
3222 | asection *s; | |
3223 | bfd_byte *p; | |
3224 | bfd_size_type i; | |
3225 | Elf_Internal_Verdef def; | |
3226 | Elf_Internal_Verdaux defaux; | |
3227 | ||
3d4d4302 | 3228 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
3229 | p = s->contents; |
3230 | do | |
3231 | { | |
3232 | _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p, | |
3233 | &def); | |
3234 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
3235 | if (def.vd_aux != sizeof (Elf_External_Verdef)) |
3236 | continue; | |
5a580b3a AM |
3237 | for (i = 0; i < def.vd_cnt; ++i) |
3238 | { | |
3239 | _bfd_elf_swap_verdaux_in (output_bfd, | |
3240 | (Elf_External_Verdaux *) p, &defaux); | |
3241 | defaux.vda_name = _bfd_elf_strtab_offset (dynstr, | |
3242 | defaux.vda_name); | |
3243 | _bfd_elf_swap_verdaux_out (output_bfd, | |
3244 | &defaux, (Elf_External_Verdaux *) p); | |
3245 | p += sizeof (Elf_External_Verdaux); | |
3246 | } | |
3247 | } | |
3248 | while (def.vd_next); | |
3249 | } | |
3250 | ||
3251 | /* Adjust version references. */ | |
3252 | if (elf_tdata (output_bfd)->verref) | |
3253 | { | |
3254 | asection *s; | |
3255 | bfd_byte *p; | |
3256 | bfd_size_type i; | |
3257 | Elf_Internal_Verneed need; | |
3258 | Elf_Internal_Vernaux needaux; | |
3259 | ||
3d4d4302 | 3260 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
3261 | p = s->contents; |
3262 | do | |
3263 | { | |
3264 | _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p, | |
3265 | &need); | |
3266 | need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file); | |
3267 | _bfd_elf_swap_verneed_out (output_bfd, &need, | |
3268 | (Elf_External_Verneed *) p); | |
3269 | p += sizeof (Elf_External_Verneed); | |
3270 | for (i = 0; i < need.vn_cnt; ++i) | |
3271 | { | |
3272 | _bfd_elf_swap_vernaux_in (output_bfd, | |
3273 | (Elf_External_Vernaux *) p, &needaux); | |
3274 | needaux.vna_name = _bfd_elf_strtab_offset (dynstr, | |
3275 | needaux.vna_name); | |
3276 | _bfd_elf_swap_vernaux_out (output_bfd, | |
3277 | &needaux, | |
3278 | (Elf_External_Vernaux *) p); | |
3279 | p += sizeof (Elf_External_Vernaux); | |
3280 | } | |
3281 | } | |
3282 | while (need.vn_next); | |
3283 | } | |
3284 | ||
3285 | return TRUE; | |
3286 | } | |
3287 | \f | |
13285a1b AM |
3288 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. |
3289 | The default is to only match when the INPUT and OUTPUT are exactly | |
3290 | the same target. */ | |
3291 | ||
3292 | bfd_boolean | |
3293 | _bfd_elf_default_relocs_compatible (const bfd_target *input, | |
3294 | const bfd_target *output) | |
3295 | { | |
3296 | return input == output; | |
3297 | } | |
3298 | ||
3299 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. | |
3300 | This version is used when different targets for the same architecture | |
3301 | are virtually identical. */ | |
3302 | ||
3303 | bfd_boolean | |
3304 | _bfd_elf_relocs_compatible (const bfd_target *input, | |
3305 | const bfd_target *output) | |
3306 | { | |
3307 | const struct elf_backend_data *obed, *ibed; | |
3308 | ||
3309 | if (input == output) | |
3310 | return TRUE; | |
3311 | ||
3312 | ibed = xvec_get_elf_backend_data (input); | |
3313 | obed = xvec_get_elf_backend_data (output); | |
3314 | ||
3315 | if (ibed->arch != obed->arch) | |
3316 | return FALSE; | |
3317 | ||
3318 | /* If both backends are using this function, deem them compatible. */ | |
3319 | return ibed->relocs_compatible == obed->relocs_compatible; | |
3320 | } | |
3321 | ||
e5034e59 AM |
3322 | /* Make a special call to the linker "notice" function to tell it that |
3323 | we are about to handle an as-needed lib, or have finished | |
3324 | processing the lib. */ | |
3325 | ||
3326 | bfd_boolean | |
3327 | _bfd_elf_notice_as_needed (bfd *ibfd, | |
3328 | struct bfd_link_info *info, | |
3329 | enum notice_asneeded_action act) | |
3330 | { | |
3331 | return (*info->callbacks->notice) (info, NULL, ibfd, NULL, act, 0, NULL); | |
3332 | } | |
3333 | ||
4ad4eba5 AM |
3334 | /* Add symbols from an ELF object file to the linker hash table. */ |
3335 | ||
3336 | static bfd_boolean | |
3337 | elf_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info) | |
3338 | { | |
a0c402a5 | 3339 | Elf_Internal_Ehdr *ehdr; |
4ad4eba5 AM |
3340 | Elf_Internal_Shdr *hdr; |
3341 | bfd_size_type symcount; | |
3342 | bfd_size_type extsymcount; | |
3343 | bfd_size_type extsymoff; | |
3344 | struct elf_link_hash_entry **sym_hash; | |
3345 | bfd_boolean dynamic; | |
3346 | Elf_External_Versym *extversym = NULL; | |
3347 | Elf_External_Versym *ever; | |
3348 | struct elf_link_hash_entry *weaks; | |
3349 | struct elf_link_hash_entry **nondeflt_vers = NULL; | |
3350 | bfd_size_type nondeflt_vers_cnt = 0; | |
3351 | Elf_Internal_Sym *isymbuf = NULL; | |
3352 | Elf_Internal_Sym *isym; | |
3353 | Elf_Internal_Sym *isymend; | |
3354 | const struct elf_backend_data *bed; | |
3355 | bfd_boolean add_needed; | |
66eb6687 | 3356 | struct elf_link_hash_table *htab; |
4ad4eba5 | 3357 | bfd_size_type amt; |
66eb6687 | 3358 | void *alloc_mark = NULL; |
4f87808c AM |
3359 | struct bfd_hash_entry **old_table = NULL; |
3360 | unsigned int old_size = 0; | |
3361 | unsigned int old_count = 0; | |
66eb6687 | 3362 | void *old_tab = NULL; |
66eb6687 AM |
3363 | void *old_ent; |
3364 | struct bfd_link_hash_entry *old_undefs = NULL; | |
3365 | struct bfd_link_hash_entry *old_undefs_tail = NULL; | |
3366 | long old_dynsymcount = 0; | |
a4542f1b | 3367 | bfd_size_type old_dynstr_size = 0; |
66eb6687 | 3368 | size_t tabsize = 0; |
db6a5d5f | 3369 | asection *s; |
4ad4eba5 | 3370 | |
66eb6687 | 3371 | htab = elf_hash_table (info); |
4ad4eba5 | 3372 | bed = get_elf_backend_data (abfd); |
4ad4eba5 AM |
3373 | |
3374 | if ((abfd->flags & DYNAMIC) == 0) | |
3375 | dynamic = FALSE; | |
3376 | else | |
3377 | { | |
3378 | dynamic = TRUE; | |
3379 | ||
3380 | /* You can't use -r against a dynamic object. Also, there's no | |
3381 | hope of using a dynamic object which does not exactly match | |
3382 | the format of the output file. */ | |
3383 | if (info->relocatable | |
66eb6687 | 3384 | || !is_elf_hash_table (htab) |
f13a99db | 3385 | || info->output_bfd->xvec != abfd->xvec) |
4ad4eba5 | 3386 | { |
9a0789ec NC |
3387 | if (info->relocatable) |
3388 | bfd_set_error (bfd_error_invalid_operation); | |
3389 | else | |
3390 | bfd_set_error (bfd_error_wrong_format); | |
4ad4eba5 AM |
3391 | goto error_return; |
3392 | } | |
3393 | } | |
3394 | ||
a0c402a5 L |
3395 | ehdr = elf_elfheader (abfd); |
3396 | if (info->warn_alternate_em | |
3397 | && bed->elf_machine_code != ehdr->e_machine | |
3398 | && ((bed->elf_machine_alt1 != 0 | |
3399 | && ehdr->e_machine == bed->elf_machine_alt1) | |
3400 | || (bed->elf_machine_alt2 != 0 | |
3401 | && ehdr->e_machine == bed->elf_machine_alt2))) | |
3402 | info->callbacks->einfo | |
3403 | (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"), | |
3404 | ehdr->e_machine, abfd, bed->elf_machine_code); | |
3405 | ||
4ad4eba5 AM |
3406 | /* As a GNU extension, any input sections which are named |
3407 | .gnu.warning.SYMBOL are treated as warning symbols for the given | |
3408 | symbol. This differs from .gnu.warning sections, which generate | |
3409 | warnings when they are included in an output file. */ | |
dd98f8d2 | 3410 | /* PR 12761: Also generate this warning when building shared libraries. */ |
db6a5d5f | 3411 | for (s = abfd->sections; s != NULL; s = s->next) |
4ad4eba5 | 3412 | { |
db6a5d5f | 3413 | const char *name; |
4ad4eba5 | 3414 | |
db6a5d5f AM |
3415 | name = bfd_get_section_name (abfd, s); |
3416 | if (CONST_STRNEQ (name, ".gnu.warning.")) | |
4ad4eba5 | 3417 | { |
db6a5d5f AM |
3418 | char *msg; |
3419 | bfd_size_type sz; | |
3420 | ||
3421 | name += sizeof ".gnu.warning." - 1; | |
3422 | ||
3423 | /* If this is a shared object, then look up the symbol | |
3424 | in the hash table. If it is there, and it is already | |
3425 | been defined, then we will not be using the entry | |
3426 | from this shared object, so we don't need to warn. | |
3427 | FIXME: If we see the definition in a regular object | |
3428 | later on, we will warn, but we shouldn't. The only | |
3429 | fix is to keep track of what warnings we are supposed | |
3430 | to emit, and then handle them all at the end of the | |
3431 | link. */ | |
3432 | if (dynamic) | |
4ad4eba5 | 3433 | { |
db6a5d5f AM |
3434 | struct elf_link_hash_entry *h; |
3435 | ||
3436 | h = elf_link_hash_lookup (htab, name, FALSE, FALSE, TRUE); | |
3437 | ||
3438 | /* FIXME: What about bfd_link_hash_common? */ | |
3439 | if (h != NULL | |
3440 | && (h->root.type == bfd_link_hash_defined | |
3441 | || h->root.type == bfd_link_hash_defweak)) | |
3442 | continue; | |
3443 | } | |
4ad4eba5 | 3444 | |
db6a5d5f AM |
3445 | sz = s->size; |
3446 | msg = (char *) bfd_alloc (abfd, sz + 1); | |
3447 | if (msg == NULL) | |
3448 | goto error_return; | |
4ad4eba5 | 3449 | |
db6a5d5f AM |
3450 | if (! bfd_get_section_contents (abfd, s, msg, 0, sz)) |
3451 | goto error_return; | |
4ad4eba5 | 3452 | |
db6a5d5f | 3453 | msg[sz] = '\0'; |
4ad4eba5 | 3454 | |
db6a5d5f AM |
3455 | if (! (_bfd_generic_link_add_one_symbol |
3456 | (info, abfd, name, BSF_WARNING, s, 0, msg, | |
3457 | FALSE, bed->collect, NULL))) | |
3458 | goto error_return; | |
4ad4eba5 | 3459 | |
db6a5d5f AM |
3460 | if (!info->relocatable && info->executable) |
3461 | { | |
3462 | /* Clobber the section size so that the warning does | |
3463 | not get copied into the output file. */ | |
3464 | s->size = 0; | |
11d2f718 | 3465 | |
db6a5d5f AM |
3466 | /* Also set SEC_EXCLUDE, so that symbols defined in |
3467 | the warning section don't get copied to the output. */ | |
3468 | s->flags |= SEC_EXCLUDE; | |
4ad4eba5 AM |
3469 | } |
3470 | } | |
3471 | } | |
3472 | ||
3473 | add_needed = TRUE; | |
3474 | if (! dynamic) | |
3475 | { | |
3476 | /* If we are creating a shared library, create all the dynamic | |
3477 | sections immediately. We need to attach them to something, | |
3478 | so we attach them to this BFD, provided it is the right | |
3479 | format. FIXME: If there are no input BFD's of the same | |
3480 | format as the output, we can't make a shared library. */ | |
3481 | if (info->shared | |
66eb6687 | 3482 | && is_elf_hash_table (htab) |
f13a99db | 3483 | && info->output_bfd->xvec == abfd->xvec |
66eb6687 | 3484 | && !htab->dynamic_sections_created) |
4ad4eba5 AM |
3485 | { |
3486 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
3487 | goto error_return; | |
3488 | } | |
3489 | } | |
66eb6687 | 3490 | else if (!is_elf_hash_table (htab)) |
4ad4eba5 AM |
3491 | goto error_return; |
3492 | else | |
3493 | { | |
4ad4eba5 | 3494 | const char *soname = NULL; |
7ee314fa | 3495 | char *audit = NULL; |
4ad4eba5 AM |
3496 | struct bfd_link_needed_list *rpath = NULL, *runpath = NULL; |
3497 | int ret; | |
3498 | ||
3499 | /* ld --just-symbols and dynamic objects don't mix very well. | |
92fd189d | 3500 | ld shouldn't allow it. */ |
4ad4eba5 | 3501 | if ((s = abfd->sections) != NULL |
dbaa2011 | 3502 | && s->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
92fd189d | 3503 | abort (); |
4ad4eba5 AM |
3504 | |
3505 | /* If this dynamic lib was specified on the command line with | |
3506 | --as-needed in effect, then we don't want to add a DT_NEEDED | |
3507 | tag unless the lib is actually used. Similary for libs brought | |
e56f61be L |
3508 | in by another lib's DT_NEEDED. When --no-add-needed is used |
3509 | on a dynamic lib, we don't want to add a DT_NEEDED entry for | |
3510 | any dynamic library in DT_NEEDED tags in the dynamic lib at | |
3511 | all. */ | |
3512 | add_needed = (elf_dyn_lib_class (abfd) | |
3513 | & (DYN_AS_NEEDED | DYN_DT_NEEDED | |
3514 | | DYN_NO_NEEDED)) == 0; | |
4ad4eba5 AM |
3515 | |
3516 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
3517 | if (s != NULL) | |
3518 | { | |
3519 | bfd_byte *dynbuf; | |
3520 | bfd_byte *extdyn; | |
cb33740c | 3521 | unsigned int elfsec; |
4ad4eba5 AM |
3522 | unsigned long shlink; |
3523 | ||
eea6121a | 3524 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) |
f8703194 L |
3525 | { |
3526 | error_free_dyn: | |
3527 | free (dynbuf); | |
3528 | goto error_return; | |
3529 | } | |
4ad4eba5 AM |
3530 | |
3531 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 3532 | if (elfsec == SHN_BAD) |
4ad4eba5 AM |
3533 | goto error_free_dyn; |
3534 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
3535 | ||
3536 | for (extdyn = dynbuf; | |
eea6121a | 3537 | extdyn < dynbuf + s->size; |
4ad4eba5 AM |
3538 | extdyn += bed->s->sizeof_dyn) |
3539 | { | |
3540 | Elf_Internal_Dyn dyn; | |
3541 | ||
3542 | bed->s->swap_dyn_in (abfd, extdyn, &dyn); | |
3543 | if (dyn.d_tag == DT_SONAME) | |
3544 | { | |
3545 | unsigned int tagv = dyn.d_un.d_val; | |
3546 | soname = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3547 | if (soname == NULL) | |
3548 | goto error_free_dyn; | |
3549 | } | |
3550 | if (dyn.d_tag == DT_NEEDED) | |
3551 | { | |
3552 | struct bfd_link_needed_list *n, **pn; | |
3553 | char *fnm, *anm; | |
3554 | unsigned int tagv = dyn.d_un.d_val; | |
3555 | ||
3556 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3557 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3558 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3559 | if (n == NULL || fnm == NULL) | |
3560 | goto error_free_dyn; | |
3561 | amt = strlen (fnm) + 1; | |
a50b1753 | 3562 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3563 | if (anm == NULL) |
3564 | goto error_free_dyn; | |
3565 | memcpy (anm, fnm, amt); | |
3566 | n->name = anm; | |
3567 | n->by = abfd; | |
3568 | n->next = NULL; | |
66eb6687 | 3569 | for (pn = &htab->needed; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3570 | ; |
3571 | *pn = n; | |
3572 | } | |
3573 | if (dyn.d_tag == DT_RUNPATH) | |
3574 | { | |
3575 | struct bfd_link_needed_list *n, **pn; | |
3576 | char *fnm, *anm; | |
3577 | unsigned int tagv = dyn.d_un.d_val; | |
3578 | ||
3579 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3580 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3581 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3582 | if (n == NULL || fnm == NULL) | |
3583 | goto error_free_dyn; | |
3584 | amt = strlen (fnm) + 1; | |
a50b1753 | 3585 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3586 | if (anm == NULL) |
3587 | goto error_free_dyn; | |
3588 | memcpy (anm, fnm, amt); | |
3589 | n->name = anm; | |
3590 | n->by = abfd; | |
3591 | n->next = NULL; | |
3592 | for (pn = & runpath; | |
3593 | *pn != NULL; | |
3594 | pn = &(*pn)->next) | |
3595 | ; | |
3596 | *pn = n; | |
3597 | } | |
3598 | /* Ignore DT_RPATH if we have seen DT_RUNPATH. */ | |
3599 | if (!runpath && dyn.d_tag == DT_RPATH) | |
3600 | { | |
3601 | struct bfd_link_needed_list *n, **pn; | |
3602 | char *fnm, *anm; | |
3603 | unsigned int tagv = dyn.d_un.d_val; | |
3604 | ||
3605 | amt = sizeof (struct bfd_link_needed_list); | |
a50b1753 | 3606 | n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4ad4eba5 AM |
3607 | fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv); |
3608 | if (n == NULL || fnm == NULL) | |
3609 | goto error_free_dyn; | |
3610 | amt = strlen (fnm) + 1; | |
a50b1753 | 3611 | anm = (char *) bfd_alloc (abfd, amt); |
4ad4eba5 | 3612 | if (anm == NULL) |
f8703194 | 3613 | goto error_free_dyn; |
4ad4eba5 AM |
3614 | memcpy (anm, fnm, amt); |
3615 | n->name = anm; | |
3616 | n->by = abfd; | |
3617 | n->next = NULL; | |
3618 | for (pn = & rpath; | |
3619 | *pn != NULL; | |
3620 | pn = &(*pn)->next) | |
3621 | ; | |
3622 | *pn = n; | |
3623 | } | |
7ee314fa AM |
3624 | if (dyn.d_tag == DT_AUDIT) |
3625 | { | |
3626 | unsigned int tagv = dyn.d_un.d_val; | |
3627 | audit = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
3628 | } | |
4ad4eba5 AM |
3629 | } |
3630 | ||
3631 | free (dynbuf); | |
3632 | } | |
3633 | ||
3634 | /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that | |
3635 | frees all more recently bfd_alloc'd blocks as well. */ | |
3636 | if (runpath) | |
3637 | rpath = runpath; | |
3638 | ||
3639 | if (rpath) | |
3640 | { | |
3641 | struct bfd_link_needed_list **pn; | |
66eb6687 | 3642 | for (pn = &htab->runpath; *pn != NULL; pn = &(*pn)->next) |
4ad4eba5 AM |
3643 | ; |
3644 | *pn = rpath; | |
3645 | } | |
3646 | ||
3647 | /* We do not want to include any of the sections in a dynamic | |
3648 | object in the output file. We hack by simply clobbering the | |
3649 | list of sections in the BFD. This could be handled more | |
3650 | cleanly by, say, a new section flag; the existing | |
3651 | SEC_NEVER_LOAD flag is not the one we want, because that one | |
3652 | still implies that the section takes up space in the output | |
3653 | file. */ | |
3654 | bfd_section_list_clear (abfd); | |
3655 | ||
4ad4eba5 AM |
3656 | /* Find the name to use in a DT_NEEDED entry that refers to this |
3657 | object. If the object has a DT_SONAME entry, we use it. | |
3658 | Otherwise, if the generic linker stuck something in | |
3659 | elf_dt_name, we use that. Otherwise, we just use the file | |
3660 | name. */ | |
3661 | if (soname == NULL || *soname == '\0') | |
3662 | { | |
3663 | soname = elf_dt_name (abfd); | |
3664 | if (soname == NULL || *soname == '\0') | |
3665 | soname = bfd_get_filename (abfd); | |
3666 | } | |
3667 | ||
3668 | /* Save the SONAME because sometimes the linker emulation code | |
3669 | will need to know it. */ | |
3670 | elf_dt_name (abfd) = soname; | |
3671 | ||
7e9f0867 | 3672 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
3673 | if (ret < 0) |
3674 | goto error_return; | |
3675 | ||
3676 | /* If we have already included this dynamic object in the | |
3677 | link, just ignore it. There is no reason to include a | |
3678 | particular dynamic object more than once. */ | |
3679 | if (ret > 0) | |
3680 | return TRUE; | |
7ee314fa AM |
3681 | |
3682 | /* Save the DT_AUDIT entry for the linker emulation code. */ | |
68ffbac6 | 3683 | elf_dt_audit (abfd) = audit; |
4ad4eba5 AM |
3684 | } |
3685 | ||
3686 | /* If this is a dynamic object, we always link against the .dynsym | |
3687 | symbol table, not the .symtab symbol table. The dynamic linker | |
3688 | will only see the .dynsym symbol table, so there is no reason to | |
3689 | look at .symtab for a dynamic object. */ | |
3690 | ||
3691 | if (! dynamic || elf_dynsymtab (abfd) == 0) | |
3692 | hdr = &elf_tdata (abfd)->symtab_hdr; | |
3693 | else | |
3694 | hdr = &elf_tdata (abfd)->dynsymtab_hdr; | |
3695 | ||
3696 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
3697 | ||
3698 | /* The sh_info field of the symtab header tells us where the | |
3699 | external symbols start. We don't care about the local symbols at | |
3700 | this point. */ | |
3701 | if (elf_bad_symtab (abfd)) | |
3702 | { | |
3703 | extsymcount = symcount; | |
3704 | extsymoff = 0; | |
3705 | } | |
3706 | else | |
3707 | { | |
3708 | extsymcount = symcount - hdr->sh_info; | |
3709 | extsymoff = hdr->sh_info; | |
3710 | } | |
3711 | ||
f45794cb | 3712 | sym_hash = elf_sym_hashes (abfd); |
012b2306 | 3713 | if (extsymcount != 0) |
4ad4eba5 AM |
3714 | { |
3715 | isymbuf = bfd_elf_get_elf_syms (abfd, hdr, extsymcount, extsymoff, | |
3716 | NULL, NULL, NULL); | |
3717 | if (isymbuf == NULL) | |
3718 | goto error_return; | |
3719 | ||
4ad4eba5 | 3720 | if (sym_hash == NULL) |
012b2306 AM |
3721 | { |
3722 | /* We store a pointer to the hash table entry for each | |
3723 | external symbol. */ | |
3724 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
3725 | sym_hash = (struct elf_link_hash_entry **) bfd_zalloc (abfd, amt); | |
3726 | if (sym_hash == NULL) | |
3727 | goto error_free_sym; | |
3728 | elf_sym_hashes (abfd) = sym_hash; | |
3729 | } | |
4ad4eba5 AM |
3730 | } |
3731 | ||
3732 | if (dynamic) | |
3733 | { | |
3734 | /* Read in any version definitions. */ | |
fc0e6df6 PB |
3735 | if (!_bfd_elf_slurp_version_tables (abfd, |
3736 | info->default_imported_symver)) | |
4ad4eba5 AM |
3737 | goto error_free_sym; |
3738 | ||
3739 | /* Read in the symbol versions, but don't bother to convert them | |
3740 | to internal format. */ | |
3741 | if (elf_dynversym (abfd) != 0) | |
3742 | { | |
3743 | Elf_Internal_Shdr *versymhdr; | |
3744 | ||
3745 | versymhdr = &elf_tdata (abfd)->dynversym_hdr; | |
a50b1753 | 3746 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
4ad4eba5 AM |
3747 | if (extversym == NULL) |
3748 | goto error_free_sym; | |
3749 | amt = versymhdr->sh_size; | |
3750 | if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0 | |
3751 | || bfd_bread (extversym, amt, abfd) != amt) | |
3752 | goto error_free_vers; | |
3753 | } | |
3754 | } | |
3755 | ||
66eb6687 AM |
3756 | /* If we are loading an as-needed shared lib, save the symbol table |
3757 | state before we start adding symbols. If the lib turns out | |
3758 | to be unneeded, restore the state. */ | |
3759 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
3760 | { | |
3761 | unsigned int i; | |
3762 | size_t entsize; | |
3763 | ||
3764 | for (entsize = 0, i = 0; i < htab->root.table.size; i++) | |
3765 | { | |
3766 | struct bfd_hash_entry *p; | |
2de92251 | 3767 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3768 | |
3769 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
2de92251 AM |
3770 | { |
3771 | h = (struct elf_link_hash_entry *) p; | |
3772 | entsize += htab->root.table.entsize; | |
3773 | if (h->root.type == bfd_link_hash_warning) | |
3774 | entsize += htab->root.table.entsize; | |
3775 | } | |
66eb6687 AM |
3776 | } |
3777 | ||
3778 | tabsize = htab->root.table.size * sizeof (struct bfd_hash_entry *); | |
f45794cb | 3779 | old_tab = bfd_malloc (tabsize + entsize); |
66eb6687 AM |
3780 | if (old_tab == NULL) |
3781 | goto error_free_vers; | |
3782 | ||
3783 | /* Remember the current objalloc pointer, so that all mem for | |
3784 | symbols added can later be reclaimed. */ | |
3785 | alloc_mark = bfd_hash_allocate (&htab->root.table, 1); | |
3786 | if (alloc_mark == NULL) | |
3787 | goto error_free_vers; | |
3788 | ||
5061a885 AM |
3789 | /* Make a special call to the linker "notice" function to |
3790 | tell it that we are about to handle an as-needed lib. */ | |
e5034e59 | 3791 | if (!(*bed->notice_as_needed) (abfd, info, notice_as_needed)) |
9af2a943 | 3792 | goto error_free_vers; |
5061a885 | 3793 | |
f45794cb AM |
3794 | /* Clone the symbol table. Remember some pointers into the |
3795 | symbol table, and dynamic symbol count. */ | |
3796 | old_ent = (char *) old_tab + tabsize; | |
66eb6687 | 3797 | memcpy (old_tab, htab->root.table.table, tabsize); |
66eb6687 AM |
3798 | old_undefs = htab->root.undefs; |
3799 | old_undefs_tail = htab->root.undefs_tail; | |
4f87808c AM |
3800 | old_table = htab->root.table.table; |
3801 | old_size = htab->root.table.size; | |
3802 | old_count = htab->root.table.count; | |
66eb6687 | 3803 | old_dynsymcount = htab->dynsymcount; |
a4542f1b | 3804 | old_dynstr_size = _bfd_elf_strtab_size (htab->dynstr); |
66eb6687 AM |
3805 | |
3806 | for (i = 0; i < htab->root.table.size; i++) | |
3807 | { | |
3808 | struct bfd_hash_entry *p; | |
2de92251 | 3809 | struct elf_link_hash_entry *h; |
66eb6687 AM |
3810 | |
3811 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
3812 | { | |
3813 | memcpy (old_ent, p, htab->root.table.entsize); | |
3814 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
3815 | h = (struct elf_link_hash_entry *) p; |
3816 | if (h->root.type == bfd_link_hash_warning) | |
3817 | { | |
3818 | memcpy (old_ent, h->root.u.i.link, htab->root.table.entsize); | |
3819 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
3820 | } | |
66eb6687 AM |
3821 | } |
3822 | } | |
3823 | } | |
4ad4eba5 | 3824 | |
66eb6687 | 3825 | weaks = NULL; |
4ad4eba5 AM |
3826 | ever = extversym != NULL ? extversym + extsymoff : NULL; |
3827 | for (isym = isymbuf, isymend = isymbuf + extsymcount; | |
3828 | isym < isymend; | |
3829 | isym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL)) | |
3830 | { | |
3831 | int bind; | |
3832 | bfd_vma value; | |
af44c138 | 3833 | asection *sec, *new_sec; |
4ad4eba5 AM |
3834 | flagword flags; |
3835 | const char *name; | |
3836 | struct elf_link_hash_entry *h; | |
90c984fc | 3837 | struct elf_link_hash_entry *hi; |
4ad4eba5 AM |
3838 | bfd_boolean definition; |
3839 | bfd_boolean size_change_ok; | |
3840 | bfd_boolean type_change_ok; | |
3841 | bfd_boolean new_weakdef; | |
37a9e49a L |
3842 | bfd_boolean new_weak; |
3843 | bfd_boolean old_weak; | |
4ad4eba5 | 3844 | bfd_boolean override; |
a4d8e49b | 3845 | bfd_boolean common; |
4ad4eba5 AM |
3846 | unsigned int old_alignment; |
3847 | bfd *old_bfd; | |
3848 | ||
3849 | override = FALSE; | |
3850 | ||
3851 | flags = BSF_NO_FLAGS; | |
3852 | sec = NULL; | |
3853 | value = isym->st_value; | |
a4d8e49b | 3854 | common = bed->common_definition (isym); |
4ad4eba5 AM |
3855 | |
3856 | bind = ELF_ST_BIND (isym->st_info); | |
3e7a7d11 | 3857 | switch (bind) |
4ad4eba5 | 3858 | { |
3e7a7d11 | 3859 | case STB_LOCAL: |
4ad4eba5 AM |
3860 | /* This should be impossible, since ELF requires that all |
3861 | global symbols follow all local symbols, and that sh_info | |
3862 | point to the first global symbol. Unfortunately, Irix 5 | |
3863 | screws this up. */ | |
3864 | continue; | |
3e7a7d11 NC |
3865 | |
3866 | case STB_GLOBAL: | |
a4d8e49b | 3867 | if (isym->st_shndx != SHN_UNDEF && !common) |
4ad4eba5 | 3868 | flags = BSF_GLOBAL; |
3e7a7d11 NC |
3869 | break; |
3870 | ||
3871 | case STB_WEAK: | |
3872 | flags = BSF_WEAK; | |
3873 | break; | |
3874 | ||
3875 | case STB_GNU_UNIQUE: | |
3876 | flags = BSF_GNU_UNIQUE; | |
3877 | break; | |
3878 | ||
3879 | default: | |
4ad4eba5 | 3880 | /* Leave it up to the processor backend. */ |
3e7a7d11 | 3881 | break; |
4ad4eba5 AM |
3882 | } |
3883 | ||
3884 | if (isym->st_shndx == SHN_UNDEF) | |
3885 | sec = bfd_und_section_ptr; | |
cb33740c AM |
3886 | else if (isym->st_shndx == SHN_ABS) |
3887 | sec = bfd_abs_section_ptr; | |
3888 | else if (isym->st_shndx == SHN_COMMON) | |
3889 | { | |
3890 | sec = bfd_com_section_ptr; | |
3891 | /* What ELF calls the size we call the value. What ELF | |
3892 | calls the value we call the alignment. */ | |
3893 | value = isym->st_size; | |
3894 | } | |
3895 | else | |
4ad4eba5 AM |
3896 | { |
3897 | sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
3898 | if (sec == NULL) | |
3899 | sec = bfd_abs_section_ptr; | |
dbaa2011 | 3900 | else if (discarded_section (sec)) |
529fcb95 | 3901 | { |
e5d08002 L |
3902 | /* Symbols from discarded section are undefined. We keep |
3903 | its visibility. */ | |
529fcb95 PB |
3904 | sec = bfd_und_section_ptr; |
3905 | isym->st_shndx = SHN_UNDEF; | |
3906 | } | |
4ad4eba5 AM |
3907 | else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
3908 | value -= sec->vma; | |
3909 | } | |
4ad4eba5 AM |
3910 | |
3911 | name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, | |
3912 | isym->st_name); | |
3913 | if (name == NULL) | |
3914 | goto error_free_vers; | |
3915 | ||
3916 | if (isym->st_shndx == SHN_COMMON | |
02d00247 AM |
3917 | && (abfd->flags & BFD_PLUGIN) != 0) |
3918 | { | |
3919 | asection *xc = bfd_get_section_by_name (abfd, "COMMON"); | |
3920 | ||
3921 | if (xc == NULL) | |
3922 | { | |
3923 | flagword sflags = (SEC_ALLOC | SEC_IS_COMMON | SEC_KEEP | |
3924 | | SEC_EXCLUDE); | |
3925 | xc = bfd_make_section_with_flags (abfd, "COMMON", sflags); | |
3926 | if (xc == NULL) | |
3927 | goto error_free_vers; | |
3928 | } | |
3929 | sec = xc; | |
3930 | } | |
3931 | else if (isym->st_shndx == SHN_COMMON | |
3932 | && ELF_ST_TYPE (isym->st_info) == STT_TLS | |
3933 | && !info->relocatable) | |
4ad4eba5 AM |
3934 | { |
3935 | asection *tcomm = bfd_get_section_by_name (abfd, ".tcommon"); | |
3936 | ||
3937 | if (tcomm == NULL) | |
3938 | { | |
02d00247 AM |
3939 | flagword sflags = (SEC_ALLOC | SEC_THREAD_LOCAL | SEC_IS_COMMON |
3940 | | SEC_LINKER_CREATED); | |
3941 | tcomm = bfd_make_section_with_flags (abfd, ".tcommon", sflags); | |
3496cb2a | 3942 | if (tcomm == NULL) |
4ad4eba5 AM |
3943 | goto error_free_vers; |
3944 | } | |
3945 | sec = tcomm; | |
3946 | } | |
66eb6687 | 3947 | else if (bed->elf_add_symbol_hook) |
4ad4eba5 | 3948 | { |
66eb6687 AM |
3949 | if (! (*bed->elf_add_symbol_hook) (abfd, info, isym, &name, &flags, |
3950 | &sec, &value)) | |
4ad4eba5 AM |
3951 | goto error_free_vers; |
3952 | ||
3953 | /* The hook function sets the name to NULL if this symbol | |
3954 | should be skipped for some reason. */ | |
3955 | if (name == NULL) | |
3956 | continue; | |
3957 | } | |
3958 | ||
3959 | /* Sanity check that all possibilities were handled. */ | |
3960 | if (sec == NULL) | |
3961 | { | |
3962 | bfd_set_error (bfd_error_bad_value); | |
3963 | goto error_free_vers; | |
3964 | } | |
3965 | ||
191c0c42 AM |
3966 | /* Silently discard TLS symbols from --just-syms. There's |
3967 | no way to combine a static TLS block with a new TLS block | |
3968 | for this executable. */ | |
3969 | if (ELF_ST_TYPE (isym->st_info) == STT_TLS | |
3970 | && sec->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) | |
3971 | continue; | |
3972 | ||
4ad4eba5 AM |
3973 | if (bfd_is_und_section (sec) |
3974 | || bfd_is_com_section (sec)) | |
3975 | definition = FALSE; | |
3976 | else | |
3977 | definition = TRUE; | |
3978 | ||
3979 | size_change_ok = FALSE; | |
66eb6687 | 3980 | type_change_ok = bed->type_change_ok; |
37a9e49a | 3981 | old_weak = FALSE; |
4ad4eba5 AM |
3982 | old_alignment = 0; |
3983 | old_bfd = NULL; | |
af44c138 | 3984 | new_sec = sec; |
4ad4eba5 | 3985 | |
66eb6687 | 3986 | if (is_elf_hash_table (htab)) |
4ad4eba5 AM |
3987 | { |
3988 | Elf_Internal_Versym iver; | |
3989 | unsigned int vernum = 0; | |
3990 | bfd_boolean skip; | |
3991 | ||
fc0e6df6 | 3992 | if (ever == NULL) |
4ad4eba5 | 3993 | { |
fc0e6df6 PB |
3994 | if (info->default_imported_symver) |
3995 | /* Use the default symbol version created earlier. */ | |
3996 | iver.vs_vers = elf_tdata (abfd)->cverdefs; | |
3997 | else | |
3998 | iver.vs_vers = 0; | |
3999 | } | |
4000 | else | |
4001 | _bfd_elf_swap_versym_in (abfd, ever, &iver); | |
4002 | ||
4003 | vernum = iver.vs_vers & VERSYM_VERSION; | |
4004 | ||
4005 | /* If this is a hidden symbol, or if it is not version | |
4006 | 1, we append the version name to the symbol name. | |
cc86ff91 EB |
4007 | However, we do not modify a non-hidden absolute symbol |
4008 | if it is not a function, because it might be the version | |
4009 | symbol itself. FIXME: What if it isn't? */ | |
fc0e6df6 | 4010 | if ((iver.vs_vers & VERSYM_HIDDEN) != 0 |
fcb93ecf PB |
4011 | || (vernum > 1 |
4012 | && (!bfd_is_abs_section (sec) | |
4013 | || bed->is_function_type (ELF_ST_TYPE (isym->st_info))))) | |
fc0e6df6 PB |
4014 | { |
4015 | const char *verstr; | |
4016 | size_t namelen, verlen, newlen; | |
4017 | char *newname, *p; | |
4018 | ||
4019 | if (isym->st_shndx != SHN_UNDEF) | |
4ad4eba5 | 4020 | { |
fc0e6df6 PB |
4021 | if (vernum > elf_tdata (abfd)->cverdefs) |
4022 | verstr = NULL; | |
4023 | else if (vernum > 1) | |
4024 | verstr = | |
4025 | elf_tdata (abfd)->verdef[vernum - 1].vd_nodename; | |
4026 | else | |
4027 | verstr = ""; | |
4ad4eba5 | 4028 | |
fc0e6df6 | 4029 | if (verstr == NULL) |
4ad4eba5 | 4030 | { |
fc0e6df6 PB |
4031 | (*_bfd_error_handler) |
4032 | (_("%B: %s: invalid version %u (max %d)"), | |
4033 | abfd, name, vernum, | |
4034 | elf_tdata (abfd)->cverdefs); | |
4035 | bfd_set_error (bfd_error_bad_value); | |
4036 | goto error_free_vers; | |
4ad4eba5 | 4037 | } |
fc0e6df6 PB |
4038 | } |
4039 | else | |
4040 | { | |
4041 | /* We cannot simply test for the number of | |
4042 | entries in the VERNEED section since the | |
4043 | numbers for the needed versions do not start | |
4044 | at 0. */ | |
4045 | Elf_Internal_Verneed *t; | |
4046 | ||
4047 | verstr = NULL; | |
4048 | for (t = elf_tdata (abfd)->verref; | |
4049 | t != NULL; | |
4050 | t = t->vn_nextref) | |
4ad4eba5 | 4051 | { |
fc0e6df6 | 4052 | Elf_Internal_Vernaux *a; |
4ad4eba5 | 4053 | |
fc0e6df6 PB |
4054 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) |
4055 | { | |
4056 | if (a->vna_other == vernum) | |
4ad4eba5 | 4057 | { |
fc0e6df6 PB |
4058 | verstr = a->vna_nodename; |
4059 | break; | |
4ad4eba5 | 4060 | } |
4ad4eba5 | 4061 | } |
fc0e6df6 PB |
4062 | if (a != NULL) |
4063 | break; | |
4064 | } | |
4065 | if (verstr == NULL) | |
4066 | { | |
4067 | (*_bfd_error_handler) | |
4068 | (_("%B: %s: invalid needed version %d"), | |
4069 | abfd, name, vernum); | |
4070 | bfd_set_error (bfd_error_bad_value); | |
4071 | goto error_free_vers; | |
4ad4eba5 | 4072 | } |
4ad4eba5 | 4073 | } |
fc0e6df6 PB |
4074 | |
4075 | namelen = strlen (name); | |
4076 | verlen = strlen (verstr); | |
4077 | newlen = namelen + verlen + 2; | |
4078 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4079 | && isym->st_shndx != SHN_UNDEF) | |
4080 | ++newlen; | |
4081 | ||
a50b1753 | 4082 | newname = (char *) bfd_hash_allocate (&htab->root.table, newlen); |
fc0e6df6 PB |
4083 | if (newname == NULL) |
4084 | goto error_free_vers; | |
4085 | memcpy (newname, name, namelen); | |
4086 | p = newname + namelen; | |
4087 | *p++ = ELF_VER_CHR; | |
4088 | /* If this is a defined non-hidden version symbol, | |
4089 | we add another @ to the name. This indicates the | |
4090 | default version of the symbol. */ | |
4091 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 | |
4092 | && isym->st_shndx != SHN_UNDEF) | |
4093 | *p++ = ELF_VER_CHR; | |
4094 | memcpy (p, verstr, verlen + 1); | |
4095 | ||
4096 | name = newname; | |
4ad4eba5 AM |
4097 | } |
4098 | ||
4f3fedcf AM |
4099 | if (!_bfd_elf_merge_symbol (abfd, info, name, isym, &sec, &value, |
4100 | sym_hash, &old_bfd, &old_weak, | |
4101 | &old_alignment, &skip, &override, | |
4ad4eba5 AM |
4102 | &type_change_ok, &size_change_ok)) |
4103 | goto error_free_vers; | |
4104 | ||
4105 | if (skip) | |
4106 | continue; | |
4107 | ||
4108 | if (override) | |
4109 | definition = FALSE; | |
4110 | ||
4111 | h = *sym_hash; | |
4112 | while (h->root.type == bfd_link_hash_indirect | |
4113 | || h->root.type == bfd_link_hash_warning) | |
4114 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4115 | ||
4ad4eba5 | 4116 | if (elf_tdata (abfd)->verdef != NULL |
4ad4eba5 AM |
4117 | && vernum > 1 |
4118 | && definition) | |
4119 | h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1]; | |
4120 | } | |
4121 | ||
4122 | if (! (_bfd_generic_link_add_one_symbol | |
66eb6687 | 4123 | (info, abfd, name, flags, sec, value, NULL, FALSE, bed->collect, |
4ad4eba5 AM |
4124 | (struct bfd_link_hash_entry **) sym_hash))) |
4125 | goto error_free_vers; | |
4126 | ||
4127 | h = *sym_hash; | |
90c984fc L |
4128 | /* We need to make sure that indirect symbol dynamic flags are |
4129 | updated. */ | |
4130 | hi = h; | |
4ad4eba5 AM |
4131 | while (h->root.type == bfd_link_hash_indirect |
4132 | || h->root.type == bfd_link_hash_warning) | |
4133 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3e7a7d11 | 4134 | |
4ad4eba5 AM |
4135 | *sym_hash = h; |
4136 | ||
37a9e49a | 4137 | new_weak = (flags & BSF_WEAK) != 0; |
4ad4eba5 AM |
4138 | new_weakdef = FALSE; |
4139 | if (dynamic | |
4140 | && definition | |
37a9e49a | 4141 | && new_weak |
fcb93ecf | 4142 | && !bed->is_function_type (ELF_ST_TYPE (isym->st_info)) |
66eb6687 | 4143 | && is_elf_hash_table (htab) |
f6e332e6 | 4144 | && h->u.weakdef == NULL) |
4ad4eba5 AM |
4145 | { |
4146 | /* Keep a list of all weak defined non function symbols from | |
4147 | a dynamic object, using the weakdef field. Later in this | |
4148 | function we will set the weakdef field to the correct | |
4149 | value. We only put non-function symbols from dynamic | |
4150 | objects on this list, because that happens to be the only | |
4151 | time we need to know the normal symbol corresponding to a | |
4152 | weak symbol, and the information is time consuming to | |
4153 | figure out. If the weakdef field is not already NULL, | |
4154 | then this symbol was already defined by some previous | |
4155 | dynamic object, and we will be using that previous | |
4156 | definition anyhow. */ | |
4157 | ||
f6e332e6 | 4158 | h->u.weakdef = weaks; |
4ad4eba5 AM |
4159 | weaks = h; |
4160 | new_weakdef = TRUE; | |
4161 | } | |
4162 | ||
4163 | /* Set the alignment of a common symbol. */ | |
a4d8e49b | 4164 | if ((common || bfd_is_com_section (sec)) |
4ad4eba5 AM |
4165 | && h->root.type == bfd_link_hash_common) |
4166 | { | |
4167 | unsigned int align; | |
4168 | ||
a4d8e49b | 4169 | if (common) |
af44c138 L |
4170 | align = bfd_log2 (isym->st_value); |
4171 | else | |
4172 | { | |
4173 | /* The new symbol is a common symbol in a shared object. | |
4174 | We need to get the alignment from the section. */ | |
4175 | align = new_sec->alignment_power; | |
4176 | } | |
595213d4 | 4177 | if (align > old_alignment) |
4ad4eba5 AM |
4178 | h->root.u.c.p->alignment_power = align; |
4179 | else | |
4180 | h->root.u.c.p->alignment_power = old_alignment; | |
4181 | } | |
4182 | ||
66eb6687 | 4183 | if (is_elf_hash_table (htab)) |
4ad4eba5 | 4184 | { |
4f3fedcf AM |
4185 | /* Set a flag in the hash table entry indicating the type of |
4186 | reference or definition we just found. A dynamic symbol | |
4187 | is one which is referenced or defined by both a regular | |
4188 | object and a shared object. */ | |
4189 | bfd_boolean dynsym = FALSE; | |
4190 | ||
4191 | /* Plugin symbols aren't normal. Don't set def_regular or | |
4192 | ref_regular for them, or make them dynamic. */ | |
4193 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4194 | ; | |
4195 | else if (! dynamic) | |
4196 | { | |
4197 | if (! definition) | |
4198 | { | |
4199 | h->ref_regular = 1; | |
4200 | if (bind != STB_WEAK) | |
4201 | h->ref_regular_nonweak = 1; | |
4202 | } | |
4203 | else | |
4204 | { | |
4205 | h->def_regular = 1; | |
4206 | if (h->def_dynamic) | |
4207 | { | |
4208 | h->def_dynamic = 0; | |
4209 | h->ref_dynamic = 1; | |
4210 | } | |
4211 | } | |
4212 | ||
4213 | /* If the indirect symbol has been forced local, don't | |
4214 | make the real symbol dynamic. */ | |
4215 | if ((h == hi || !hi->forced_local) | |
4216 | && (! info->executable | |
4217 | || h->def_dynamic | |
4218 | || h->ref_dynamic)) | |
4219 | dynsym = TRUE; | |
4220 | } | |
4221 | else | |
4222 | { | |
4223 | if (! definition) | |
4224 | { | |
4225 | h->ref_dynamic = 1; | |
4226 | hi->ref_dynamic = 1; | |
4227 | } | |
4228 | else | |
4229 | { | |
4230 | h->def_dynamic = 1; | |
4231 | hi->def_dynamic = 1; | |
4232 | } | |
4233 | ||
4234 | /* If the indirect symbol has been forced local, don't | |
4235 | make the real symbol dynamic. */ | |
4236 | if ((h == hi || !hi->forced_local) | |
4237 | && (h->def_regular | |
4238 | || h->ref_regular | |
4239 | || (h->u.weakdef != NULL | |
4240 | && ! new_weakdef | |
4241 | && h->u.weakdef->dynindx != -1))) | |
4242 | dynsym = TRUE; | |
4243 | } | |
4244 | ||
4245 | /* Check to see if we need to add an indirect symbol for | |
4246 | the default name. */ | |
4247 | if (definition | |
4248 | || (!override && h->root.type == bfd_link_hash_common)) | |
4249 | if (!_bfd_elf_add_default_symbol (abfd, info, h, name, isym, | |
4250 | sec, value, &old_bfd, &dynsym)) | |
4251 | goto error_free_vers; | |
4ad4eba5 AM |
4252 | |
4253 | /* Check the alignment when a common symbol is involved. This | |
4254 | can change when a common symbol is overridden by a normal | |
4255 | definition or a common symbol is ignored due to the old | |
4256 | normal definition. We need to make sure the maximum | |
4257 | alignment is maintained. */ | |
a4d8e49b | 4258 | if ((old_alignment || common) |
4ad4eba5 AM |
4259 | && h->root.type != bfd_link_hash_common) |
4260 | { | |
4261 | unsigned int common_align; | |
4262 | unsigned int normal_align; | |
4263 | unsigned int symbol_align; | |
4264 | bfd *normal_bfd; | |
4265 | bfd *common_bfd; | |
4266 | ||
3a81e825 AM |
4267 | BFD_ASSERT (h->root.type == bfd_link_hash_defined |
4268 | || h->root.type == bfd_link_hash_defweak); | |
4269 | ||
4ad4eba5 AM |
4270 | symbol_align = ffs (h->root.u.def.value) - 1; |
4271 | if (h->root.u.def.section->owner != NULL | |
4272 | && (h->root.u.def.section->owner->flags & DYNAMIC) == 0) | |
4273 | { | |
4274 | normal_align = h->root.u.def.section->alignment_power; | |
4275 | if (normal_align > symbol_align) | |
4276 | normal_align = symbol_align; | |
4277 | } | |
4278 | else | |
4279 | normal_align = symbol_align; | |
4280 | ||
4281 | if (old_alignment) | |
4282 | { | |
4283 | common_align = old_alignment; | |
4284 | common_bfd = old_bfd; | |
4285 | normal_bfd = abfd; | |
4286 | } | |
4287 | else | |
4288 | { | |
4289 | common_align = bfd_log2 (isym->st_value); | |
4290 | common_bfd = abfd; | |
4291 | normal_bfd = old_bfd; | |
4292 | } | |
4293 | ||
4294 | if (normal_align < common_align) | |
d07676f8 NC |
4295 | { |
4296 | /* PR binutils/2735 */ | |
4297 | if (normal_bfd == NULL) | |
4298 | (*_bfd_error_handler) | |
4f3fedcf AM |
4299 | (_("Warning: alignment %u of common symbol `%s' in %B is" |
4300 | " greater than the alignment (%u) of its section %A"), | |
d07676f8 NC |
4301 | common_bfd, h->root.u.def.section, |
4302 | 1 << common_align, name, 1 << normal_align); | |
4303 | else | |
4304 | (*_bfd_error_handler) | |
4305 | (_("Warning: alignment %u of symbol `%s' in %B" | |
4306 | " is smaller than %u in %B"), | |
4307 | normal_bfd, common_bfd, | |
4308 | 1 << normal_align, name, 1 << common_align); | |
4309 | } | |
4ad4eba5 AM |
4310 | } |
4311 | ||
83ad0046 | 4312 | /* Remember the symbol size if it isn't undefined. */ |
3a81e825 AM |
4313 | if (isym->st_size != 0 |
4314 | && isym->st_shndx != SHN_UNDEF | |
4ad4eba5 AM |
4315 | && (definition || h->size == 0)) |
4316 | { | |
83ad0046 L |
4317 | if (h->size != 0 |
4318 | && h->size != isym->st_size | |
4319 | && ! size_change_ok) | |
4ad4eba5 | 4320 | (*_bfd_error_handler) |
d003868e AM |
4321 | (_("Warning: size of symbol `%s' changed" |
4322 | " from %lu in %B to %lu in %B"), | |
4323 | old_bfd, abfd, | |
4ad4eba5 | 4324 | name, (unsigned long) h->size, |
d003868e | 4325 | (unsigned long) isym->st_size); |
4ad4eba5 AM |
4326 | |
4327 | h->size = isym->st_size; | |
4328 | } | |
4329 | ||
4330 | /* If this is a common symbol, then we always want H->SIZE | |
4331 | to be the size of the common symbol. The code just above | |
4332 | won't fix the size if a common symbol becomes larger. We | |
4333 | don't warn about a size change here, because that is | |
4f3fedcf | 4334 | covered by --warn-common. Allow changes between different |
fcb93ecf | 4335 | function types. */ |
4ad4eba5 AM |
4336 | if (h->root.type == bfd_link_hash_common) |
4337 | h->size = h->root.u.c.size; | |
4338 | ||
4339 | if (ELF_ST_TYPE (isym->st_info) != STT_NOTYPE | |
37a9e49a L |
4340 | && ((definition && !new_weak) |
4341 | || (old_weak && h->root.type == bfd_link_hash_common) | |
4342 | || h->type == STT_NOTYPE)) | |
4ad4eba5 | 4343 | { |
2955ec4c L |
4344 | unsigned int type = ELF_ST_TYPE (isym->st_info); |
4345 | ||
4346 | /* Turn an IFUNC symbol from a DSO into a normal FUNC | |
4347 | symbol. */ | |
4348 | if (type == STT_GNU_IFUNC | |
4349 | && (abfd->flags & DYNAMIC) != 0) | |
4350 | type = STT_FUNC; | |
4ad4eba5 | 4351 | |
2955ec4c L |
4352 | if (h->type != type) |
4353 | { | |
4354 | if (h->type != STT_NOTYPE && ! type_change_ok) | |
4355 | (*_bfd_error_handler) | |
4356 | (_("Warning: type of symbol `%s' changed" | |
4357 | " from %d to %d in %B"), | |
4358 | abfd, name, h->type, type); | |
4359 | ||
4360 | h->type = type; | |
4361 | } | |
4ad4eba5 AM |
4362 | } |
4363 | ||
54ac0771 L |
4364 | /* Merge st_other field. */ |
4365 | elf_merge_st_other (abfd, h, isym, definition, dynamic); | |
4ad4eba5 | 4366 | |
c3df8c14 | 4367 | /* We don't want to make debug symbol dynamic. */ |
b2064611 | 4368 | if (definition && (sec->flags & SEC_DEBUGGING) && !info->relocatable) |
c3df8c14 AM |
4369 | dynsym = FALSE; |
4370 | ||
4f3fedcf AM |
4371 | /* Nor should we make plugin symbols dynamic. */ |
4372 | if ((abfd->flags & BFD_PLUGIN) != 0) | |
4373 | dynsym = FALSE; | |
4374 | ||
35fc36a8 | 4375 | if (definition) |
35399224 L |
4376 | { |
4377 | h->target_internal = isym->st_target_internal; | |
4378 | h->unique_global = (flags & BSF_GNU_UNIQUE) != 0; | |
4379 | } | |
35fc36a8 | 4380 | |
4ad4eba5 AM |
4381 | if (definition && !dynamic) |
4382 | { | |
4383 | char *p = strchr (name, ELF_VER_CHR); | |
4384 | if (p != NULL && p[1] != ELF_VER_CHR) | |
4385 | { | |
4386 | /* Queue non-default versions so that .symver x, x@FOO | |
4387 | aliases can be checked. */ | |
66eb6687 | 4388 | if (!nondeflt_vers) |
4ad4eba5 | 4389 | { |
66eb6687 AM |
4390 | amt = ((isymend - isym + 1) |
4391 | * sizeof (struct elf_link_hash_entry *)); | |
a50b1753 NC |
4392 | nondeflt_vers = |
4393 | (struct elf_link_hash_entry **) bfd_malloc (amt); | |
14b1c01e AM |
4394 | if (!nondeflt_vers) |
4395 | goto error_free_vers; | |
4ad4eba5 | 4396 | } |
66eb6687 | 4397 | nondeflt_vers[nondeflt_vers_cnt++] = h; |
4ad4eba5 AM |
4398 | } |
4399 | } | |
4400 | ||
4401 | if (dynsym && h->dynindx == -1) | |
4402 | { | |
c152c796 | 4403 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4ad4eba5 | 4404 | goto error_free_vers; |
f6e332e6 | 4405 | if (h->u.weakdef != NULL |
4ad4eba5 | 4406 | && ! new_weakdef |
f6e332e6 | 4407 | && h->u.weakdef->dynindx == -1) |
4ad4eba5 | 4408 | { |
66eb6687 | 4409 | if (!bfd_elf_link_record_dynamic_symbol (info, h->u.weakdef)) |
4ad4eba5 AM |
4410 | goto error_free_vers; |
4411 | } | |
4412 | } | |
4413 | else if (dynsym && h->dynindx != -1) | |
4414 | /* If the symbol already has a dynamic index, but | |
4415 | visibility says it should not be visible, turn it into | |
4416 | a local symbol. */ | |
4417 | switch (ELF_ST_VISIBILITY (h->other)) | |
4418 | { | |
4419 | case STV_INTERNAL: | |
4420 | case STV_HIDDEN: | |
4421 | (*bed->elf_backend_hide_symbol) (info, h, TRUE); | |
4422 | dynsym = FALSE; | |
4423 | break; | |
4424 | } | |
4425 | ||
3d5bef4c | 4426 | /* Don't add DT_NEEDED for references from the dummy bfd. */ |
4ad4eba5 AM |
4427 | if (!add_needed |
4428 | && definition | |
010e5ae2 | 4429 | && ((dynsym |
ffa9430d | 4430 | && h->ref_regular_nonweak |
4f3fedcf AM |
4431 | && (old_bfd == NULL |
4432 | || (old_bfd->flags & BFD_PLUGIN) == 0)) | |
ffa9430d | 4433 | || (h->ref_dynamic_nonweak |
010e5ae2 AM |
4434 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0 |
4435 | && !on_needed_list (elf_dt_name (abfd), htab->needed)))) | |
4ad4eba5 AM |
4436 | { |
4437 | int ret; | |
4438 | const char *soname = elf_dt_name (abfd); | |
4439 | ||
16e4ecc0 AM |
4440 | info->callbacks->minfo ("%!", soname, old_bfd, |
4441 | h->root.root.string); | |
4442 | ||
4ad4eba5 AM |
4443 | /* A symbol from a library loaded via DT_NEEDED of some |
4444 | other library is referenced by a regular object. | |
e56f61be | 4445 | Add a DT_NEEDED entry for it. Issue an error if |
b918acf9 NC |
4446 | --no-add-needed is used and the reference was not |
4447 | a weak one. */ | |
4f3fedcf | 4448 | if (old_bfd != NULL |
b918acf9 | 4449 | && (elf_dyn_lib_class (abfd) & DYN_NO_NEEDED) != 0) |
e56f61be L |
4450 | { |
4451 | (*_bfd_error_handler) | |
3cbc5de0 | 4452 | (_("%B: undefined reference to symbol '%s'"), |
4f3fedcf | 4453 | old_bfd, name); |
ff5ac77b | 4454 | bfd_set_error (bfd_error_missing_dso); |
e56f61be L |
4455 | goto error_free_vers; |
4456 | } | |
4457 | ||
a50b1753 NC |
4458 | elf_dyn_lib_class (abfd) = (enum dynamic_lib_link_class) |
4459 | (elf_dyn_lib_class (abfd) & ~DYN_AS_NEEDED); | |
a5db907e | 4460 | |
4ad4eba5 | 4461 | add_needed = TRUE; |
7e9f0867 | 4462 | ret = elf_add_dt_needed_tag (abfd, info, soname, add_needed); |
4ad4eba5 AM |
4463 | if (ret < 0) |
4464 | goto error_free_vers; | |
4465 | ||
4466 | BFD_ASSERT (ret == 0); | |
4467 | } | |
4468 | } | |
4469 | } | |
4470 | ||
66eb6687 AM |
4471 | if (extversym != NULL) |
4472 | { | |
4473 | free (extversym); | |
4474 | extversym = NULL; | |
4475 | } | |
4476 | ||
4477 | if (isymbuf != NULL) | |
4478 | { | |
4479 | free (isymbuf); | |
4480 | isymbuf = NULL; | |
4481 | } | |
4482 | ||
4483 | if ((elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0) | |
4484 | { | |
4485 | unsigned int i; | |
4486 | ||
4487 | /* Restore the symbol table. */ | |
f45794cb AM |
4488 | old_ent = (char *) old_tab + tabsize; |
4489 | memset (elf_sym_hashes (abfd), 0, | |
4490 | extsymcount * sizeof (struct elf_link_hash_entry *)); | |
4f87808c AM |
4491 | htab->root.table.table = old_table; |
4492 | htab->root.table.size = old_size; | |
4493 | htab->root.table.count = old_count; | |
66eb6687 | 4494 | memcpy (htab->root.table.table, old_tab, tabsize); |
66eb6687 AM |
4495 | htab->root.undefs = old_undefs; |
4496 | htab->root.undefs_tail = old_undefs_tail; | |
d45f8bda | 4497 | _bfd_elf_strtab_restore_size (htab->dynstr, old_dynstr_size); |
66eb6687 AM |
4498 | for (i = 0; i < htab->root.table.size; i++) |
4499 | { | |
4500 | struct bfd_hash_entry *p; | |
4501 | struct elf_link_hash_entry *h; | |
3e0882af L |
4502 | bfd_size_type size; |
4503 | unsigned int alignment_power; | |
66eb6687 AM |
4504 | |
4505 | for (p = htab->root.table.table[i]; p != NULL; p = p->next) | |
4506 | { | |
4507 | h = (struct elf_link_hash_entry *) p; | |
2de92251 AM |
4508 | if (h->root.type == bfd_link_hash_warning) |
4509 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
a4542f1b AM |
4510 | if (h->dynindx >= old_dynsymcount |
4511 | && h->dynstr_index < old_dynstr_size) | |
66eb6687 | 4512 | _bfd_elf_strtab_delref (htab->dynstr, h->dynstr_index); |
2de92251 | 4513 | |
3e0882af L |
4514 | /* Preserve the maximum alignment and size for common |
4515 | symbols even if this dynamic lib isn't on DT_NEEDED | |
a4542f1b | 4516 | since it can still be loaded at run time by another |
3e0882af L |
4517 | dynamic lib. */ |
4518 | if (h->root.type == bfd_link_hash_common) | |
4519 | { | |
4520 | size = h->root.u.c.size; | |
4521 | alignment_power = h->root.u.c.p->alignment_power; | |
4522 | } | |
4523 | else | |
4524 | { | |
4525 | size = 0; | |
4526 | alignment_power = 0; | |
4527 | } | |
66eb6687 AM |
4528 | memcpy (p, old_ent, htab->root.table.entsize); |
4529 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
2de92251 AM |
4530 | h = (struct elf_link_hash_entry *) p; |
4531 | if (h->root.type == bfd_link_hash_warning) | |
4532 | { | |
4533 | memcpy (h->root.u.i.link, old_ent, htab->root.table.entsize); | |
4534 | old_ent = (char *) old_ent + htab->root.table.entsize; | |
a4542f1b | 4535 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
2de92251 | 4536 | } |
a4542f1b | 4537 | if (h->root.type == bfd_link_hash_common) |
3e0882af L |
4538 | { |
4539 | if (size > h->root.u.c.size) | |
4540 | h->root.u.c.size = size; | |
4541 | if (alignment_power > h->root.u.c.p->alignment_power) | |
4542 | h->root.u.c.p->alignment_power = alignment_power; | |
4543 | } | |
66eb6687 AM |
4544 | } |
4545 | } | |
4546 | ||
5061a885 AM |
4547 | /* Make a special call to the linker "notice" function to |
4548 | tell it that symbols added for crefs may need to be removed. */ | |
e5034e59 | 4549 | if (!(*bed->notice_as_needed) (abfd, info, notice_not_needed)) |
9af2a943 | 4550 | goto error_free_vers; |
5061a885 | 4551 | |
66eb6687 AM |
4552 | free (old_tab); |
4553 | objalloc_free_block ((struct objalloc *) htab->root.table.memory, | |
4554 | alloc_mark); | |
4555 | if (nondeflt_vers != NULL) | |
4556 | free (nondeflt_vers); | |
4557 | return TRUE; | |
4558 | } | |
2de92251 | 4559 | |
66eb6687 AM |
4560 | if (old_tab != NULL) |
4561 | { | |
e5034e59 | 4562 | if (!(*bed->notice_as_needed) (abfd, info, notice_needed)) |
9af2a943 | 4563 | goto error_free_vers; |
66eb6687 AM |
4564 | free (old_tab); |
4565 | old_tab = NULL; | |
4566 | } | |
4567 | ||
4ad4eba5 AM |
4568 | /* Now that all the symbols from this input file are created, handle |
4569 | .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */ | |
4570 | if (nondeflt_vers != NULL) | |
4571 | { | |
4572 | bfd_size_type cnt, symidx; | |
4573 | ||
4574 | for (cnt = 0; cnt < nondeflt_vers_cnt; ++cnt) | |
4575 | { | |
4576 | struct elf_link_hash_entry *h = nondeflt_vers[cnt], *hi; | |
4577 | char *shortname, *p; | |
4578 | ||
4579 | p = strchr (h->root.root.string, ELF_VER_CHR); | |
4580 | if (p == NULL | |
4581 | || (h->root.type != bfd_link_hash_defined | |
4582 | && h->root.type != bfd_link_hash_defweak)) | |
4583 | continue; | |
4584 | ||
4585 | amt = p - h->root.root.string; | |
a50b1753 | 4586 | shortname = (char *) bfd_malloc (amt + 1); |
14b1c01e AM |
4587 | if (!shortname) |
4588 | goto error_free_vers; | |
4ad4eba5 AM |
4589 | memcpy (shortname, h->root.root.string, amt); |
4590 | shortname[amt] = '\0'; | |
4591 | ||
4592 | hi = (struct elf_link_hash_entry *) | |
66eb6687 | 4593 | bfd_link_hash_lookup (&htab->root, shortname, |
4ad4eba5 AM |
4594 | FALSE, FALSE, FALSE); |
4595 | if (hi != NULL | |
4596 | && hi->root.type == h->root.type | |
4597 | && hi->root.u.def.value == h->root.u.def.value | |
4598 | && hi->root.u.def.section == h->root.u.def.section) | |
4599 | { | |
4600 | (*bed->elf_backend_hide_symbol) (info, hi, TRUE); | |
4601 | hi->root.type = bfd_link_hash_indirect; | |
4602 | hi->root.u.i.link = (struct bfd_link_hash_entry *) h; | |
fcfa13d2 | 4603 | (*bed->elf_backend_copy_indirect_symbol) (info, h, hi); |
4ad4eba5 AM |
4604 | sym_hash = elf_sym_hashes (abfd); |
4605 | if (sym_hash) | |
4606 | for (symidx = 0; symidx < extsymcount; ++symidx) | |
4607 | if (sym_hash[symidx] == hi) | |
4608 | { | |
4609 | sym_hash[symidx] = h; | |
4610 | break; | |
4611 | } | |
4612 | } | |
4613 | free (shortname); | |
4614 | } | |
4615 | free (nondeflt_vers); | |
4616 | nondeflt_vers = NULL; | |
4617 | } | |
4618 | ||
4ad4eba5 AM |
4619 | /* Now set the weakdefs field correctly for all the weak defined |
4620 | symbols we found. The only way to do this is to search all the | |
4621 | symbols. Since we only need the information for non functions in | |
4622 | dynamic objects, that's the only time we actually put anything on | |
4623 | the list WEAKS. We need this information so that if a regular | |
4624 | object refers to a symbol defined weakly in a dynamic object, the | |
4625 | real symbol in the dynamic object is also put in the dynamic | |
4626 | symbols; we also must arrange for both symbols to point to the | |
4627 | same memory location. We could handle the general case of symbol | |
4628 | aliasing, but a general symbol alias can only be generated in | |
4629 | assembler code, handling it correctly would be very time | |
4630 | consuming, and other ELF linkers don't handle general aliasing | |
4631 | either. */ | |
4632 | if (weaks != NULL) | |
4633 | { | |
4634 | struct elf_link_hash_entry **hpp; | |
4635 | struct elf_link_hash_entry **hppend; | |
4636 | struct elf_link_hash_entry **sorted_sym_hash; | |
4637 | struct elf_link_hash_entry *h; | |
4638 | size_t sym_count; | |
4639 | ||
4640 | /* Since we have to search the whole symbol list for each weak | |
4641 | defined symbol, search time for N weak defined symbols will be | |
4642 | O(N^2). Binary search will cut it down to O(NlogN). */ | |
4643 | amt = extsymcount * sizeof (struct elf_link_hash_entry *); | |
a50b1753 | 4644 | sorted_sym_hash = (struct elf_link_hash_entry **) bfd_malloc (amt); |
4ad4eba5 AM |
4645 | if (sorted_sym_hash == NULL) |
4646 | goto error_return; | |
4647 | sym_hash = sorted_sym_hash; | |
4648 | hpp = elf_sym_hashes (abfd); | |
4649 | hppend = hpp + extsymcount; | |
4650 | sym_count = 0; | |
4651 | for (; hpp < hppend; hpp++) | |
4652 | { | |
4653 | h = *hpp; | |
4654 | if (h != NULL | |
4655 | && h->root.type == bfd_link_hash_defined | |
fcb93ecf | 4656 | && !bed->is_function_type (h->type)) |
4ad4eba5 AM |
4657 | { |
4658 | *sym_hash = h; | |
4659 | sym_hash++; | |
4660 | sym_count++; | |
4661 | } | |
4662 | } | |
4663 | ||
4664 | qsort (sorted_sym_hash, sym_count, | |
4665 | sizeof (struct elf_link_hash_entry *), | |
4666 | elf_sort_symbol); | |
4667 | ||
4668 | while (weaks != NULL) | |
4669 | { | |
4670 | struct elf_link_hash_entry *hlook; | |
4671 | asection *slook; | |
4672 | bfd_vma vlook; | |
ed54588d | 4673 | size_t i, j, idx = 0; |
4ad4eba5 AM |
4674 | |
4675 | hlook = weaks; | |
f6e332e6 AM |
4676 | weaks = hlook->u.weakdef; |
4677 | hlook->u.weakdef = NULL; | |
4ad4eba5 AM |
4678 | |
4679 | BFD_ASSERT (hlook->root.type == bfd_link_hash_defined | |
4680 | || hlook->root.type == bfd_link_hash_defweak | |
4681 | || hlook->root.type == bfd_link_hash_common | |
4682 | || hlook->root.type == bfd_link_hash_indirect); | |
4683 | slook = hlook->root.u.def.section; | |
4684 | vlook = hlook->root.u.def.value; | |
4685 | ||
4ad4eba5 AM |
4686 | i = 0; |
4687 | j = sym_count; | |
14160578 | 4688 | while (i != j) |
4ad4eba5 AM |
4689 | { |
4690 | bfd_signed_vma vdiff; | |
4691 | idx = (i + j) / 2; | |
14160578 | 4692 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
4693 | vdiff = vlook - h->root.u.def.value; |
4694 | if (vdiff < 0) | |
4695 | j = idx; | |
4696 | else if (vdiff > 0) | |
4697 | i = idx + 1; | |
4698 | else | |
4699 | { | |
a9b881be | 4700 | long sdiff = slook->id - h->root.u.def.section->id; |
4ad4eba5 AM |
4701 | if (sdiff < 0) |
4702 | j = idx; | |
4703 | else if (sdiff > 0) | |
4704 | i = idx + 1; | |
4705 | else | |
14160578 | 4706 | break; |
4ad4eba5 AM |
4707 | } |
4708 | } | |
4709 | ||
4710 | /* We didn't find a value/section match. */ | |
14160578 | 4711 | if (i == j) |
4ad4eba5 AM |
4712 | continue; |
4713 | ||
14160578 AM |
4714 | /* With multiple aliases, or when the weak symbol is already |
4715 | strongly defined, we have multiple matching symbols and | |
4716 | the binary search above may land on any of them. Step | |
4717 | one past the matching symbol(s). */ | |
4718 | while (++idx != j) | |
4719 | { | |
4720 | h = sorted_sym_hash[idx]; | |
4721 | if (h->root.u.def.section != slook | |
4722 | || h->root.u.def.value != vlook) | |
4723 | break; | |
4724 | } | |
4725 | ||
4726 | /* Now look back over the aliases. Since we sorted by size | |
4727 | as well as value and section, we'll choose the one with | |
4728 | the largest size. */ | |
4729 | while (idx-- != i) | |
4ad4eba5 | 4730 | { |
14160578 | 4731 | h = sorted_sym_hash[idx]; |
4ad4eba5 AM |
4732 | |
4733 | /* Stop if value or section doesn't match. */ | |
14160578 AM |
4734 | if (h->root.u.def.section != slook |
4735 | || h->root.u.def.value != vlook) | |
4ad4eba5 AM |
4736 | break; |
4737 | else if (h != hlook) | |
4738 | { | |
f6e332e6 | 4739 | hlook->u.weakdef = h; |
4ad4eba5 AM |
4740 | |
4741 | /* If the weak definition is in the list of dynamic | |
4742 | symbols, make sure the real definition is put | |
4743 | there as well. */ | |
4744 | if (hlook->dynindx != -1 && h->dynindx == -1) | |
4745 | { | |
c152c796 | 4746 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
4dd07732 AM |
4747 | { |
4748 | err_free_sym_hash: | |
4749 | free (sorted_sym_hash); | |
4750 | goto error_return; | |
4751 | } | |
4ad4eba5 AM |
4752 | } |
4753 | ||
4754 | /* If the real definition is in the list of dynamic | |
4755 | symbols, make sure the weak definition is put | |
4756 | there as well. If we don't do this, then the | |
4757 | dynamic loader might not merge the entries for the | |
4758 | real definition and the weak definition. */ | |
4759 | if (h->dynindx != -1 && hlook->dynindx == -1) | |
4760 | { | |
c152c796 | 4761 | if (! bfd_elf_link_record_dynamic_symbol (info, hlook)) |
4dd07732 | 4762 | goto err_free_sym_hash; |
4ad4eba5 AM |
4763 | } |
4764 | break; | |
4765 | } | |
4766 | } | |
4767 | } | |
4768 | ||
4769 | free (sorted_sym_hash); | |
4770 | } | |
4771 | ||
33177bb1 AM |
4772 | if (bed->check_directives |
4773 | && !(*bed->check_directives) (abfd, info)) | |
4774 | return FALSE; | |
85fbca6a | 4775 | |
4ad4eba5 AM |
4776 | /* If this object is the same format as the output object, and it is |
4777 | not a shared library, then let the backend look through the | |
4778 | relocs. | |
4779 | ||
4780 | This is required to build global offset table entries and to | |
4781 | arrange for dynamic relocs. It is not required for the | |
4782 | particular common case of linking non PIC code, even when linking | |
4783 | against shared libraries, but unfortunately there is no way of | |
4784 | knowing whether an object file has been compiled PIC or not. | |
4785 | Looking through the relocs is not particularly time consuming. | |
4786 | The problem is that we must either (1) keep the relocs in memory, | |
4787 | which causes the linker to require additional runtime memory or | |
4788 | (2) read the relocs twice from the input file, which wastes time. | |
4789 | This would be a good case for using mmap. | |
4790 | ||
4791 | I have no idea how to handle linking PIC code into a file of a | |
4792 | different format. It probably can't be done. */ | |
4ad4eba5 | 4793 | if (! dynamic |
66eb6687 | 4794 | && is_elf_hash_table (htab) |
13285a1b | 4795 | && bed->check_relocs != NULL |
39334f3a | 4796 | && elf_object_id (abfd) == elf_hash_table_id (htab) |
f13a99db | 4797 | && (*bed->relocs_compatible) (abfd->xvec, info->output_bfd->xvec)) |
4ad4eba5 AM |
4798 | { |
4799 | asection *o; | |
4800 | ||
4801 | for (o = abfd->sections; o != NULL; o = o->next) | |
4802 | { | |
4803 | Elf_Internal_Rela *internal_relocs; | |
4804 | bfd_boolean ok; | |
4805 | ||
4806 | if ((o->flags & SEC_RELOC) == 0 | |
4807 | || o->reloc_count == 0 | |
4808 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
4809 | && (o->flags & SEC_DEBUGGING) != 0) | |
4810 | || bfd_is_abs_section (o->output_section)) | |
4811 | continue; | |
4812 | ||
4813 | internal_relocs = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, | |
4814 | info->keep_memory); | |
4815 | if (internal_relocs == NULL) | |
4816 | goto error_return; | |
4817 | ||
66eb6687 | 4818 | ok = (*bed->check_relocs) (abfd, info, o, internal_relocs); |
4ad4eba5 AM |
4819 | |
4820 | if (elf_section_data (o)->relocs != internal_relocs) | |
4821 | free (internal_relocs); | |
4822 | ||
4823 | if (! ok) | |
4824 | goto error_return; | |
4825 | } | |
4826 | } | |
4827 | ||
4828 | /* If this is a non-traditional link, try to optimize the handling | |
4829 | of the .stab/.stabstr sections. */ | |
4830 | if (! dynamic | |
4831 | && ! info->traditional_format | |
66eb6687 | 4832 | && is_elf_hash_table (htab) |
4ad4eba5 AM |
4833 | && (info->strip != strip_all && info->strip != strip_debugger)) |
4834 | { | |
4835 | asection *stabstr; | |
4836 | ||
4837 | stabstr = bfd_get_section_by_name (abfd, ".stabstr"); | |
4838 | if (stabstr != NULL) | |
4839 | { | |
4840 | bfd_size_type string_offset = 0; | |
4841 | asection *stab; | |
4842 | ||
4843 | for (stab = abfd->sections; stab; stab = stab->next) | |
0112cd26 | 4844 | if (CONST_STRNEQ (stab->name, ".stab") |
4ad4eba5 AM |
4845 | && (!stab->name[5] || |
4846 | (stab->name[5] == '.' && ISDIGIT (stab->name[6]))) | |
4847 | && (stab->flags & SEC_MERGE) == 0 | |
4848 | && !bfd_is_abs_section (stab->output_section)) | |
4849 | { | |
4850 | struct bfd_elf_section_data *secdata; | |
4851 | ||
4852 | secdata = elf_section_data (stab); | |
66eb6687 AM |
4853 | if (! _bfd_link_section_stabs (abfd, &htab->stab_info, stab, |
4854 | stabstr, &secdata->sec_info, | |
4ad4eba5 AM |
4855 | &string_offset)) |
4856 | goto error_return; | |
4857 | if (secdata->sec_info) | |
dbaa2011 | 4858 | stab->sec_info_type = SEC_INFO_TYPE_STABS; |
4ad4eba5 AM |
4859 | } |
4860 | } | |
4861 | } | |
4862 | ||
66eb6687 | 4863 | if (is_elf_hash_table (htab) && add_needed) |
4ad4eba5 AM |
4864 | { |
4865 | /* Add this bfd to the loaded list. */ | |
4866 | struct elf_link_loaded_list *n; | |
4867 | ||
a50b1753 NC |
4868 | n = (struct elf_link_loaded_list *) |
4869 | bfd_alloc (abfd, sizeof (struct elf_link_loaded_list)); | |
4ad4eba5 AM |
4870 | if (n == NULL) |
4871 | goto error_return; | |
4872 | n->abfd = abfd; | |
66eb6687 AM |
4873 | n->next = htab->loaded; |
4874 | htab->loaded = n; | |
4ad4eba5 AM |
4875 | } |
4876 | ||
4877 | return TRUE; | |
4878 | ||
4879 | error_free_vers: | |
66eb6687 AM |
4880 | if (old_tab != NULL) |
4881 | free (old_tab); | |
4ad4eba5 AM |
4882 | if (nondeflt_vers != NULL) |
4883 | free (nondeflt_vers); | |
4884 | if (extversym != NULL) | |
4885 | free (extversym); | |
4886 | error_free_sym: | |
4887 | if (isymbuf != NULL) | |
4888 | free (isymbuf); | |
4889 | error_return: | |
4890 | return FALSE; | |
4891 | } | |
4892 | ||
8387904d AM |
4893 | /* Return the linker hash table entry of a symbol that might be |
4894 | satisfied by an archive symbol. Return -1 on error. */ | |
4895 | ||
4896 | struct elf_link_hash_entry * | |
4897 | _bfd_elf_archive_symbol_lookup (bfd *abfd, | |
4898 | struct bfd_link_info *info, | |
4899 | const char *name) | |
4900 | { | |
4901 | struct elf_link_hash_entry *h; | |
4902 | char *p, *copy; | |
4903 | size_t len, first; | |
4904 | ||
2a41f396 | 4905 | h = elf_link_hash_lookup (elf_hash_table (info), name, FALSE, FALSE, TRUE); |
8387904d AM |
4906 | if (h != NULL) |
4907 | return h; | |
4908 | ||
4909 | /* If this is a default version (the name contains @@), look up the | |
4910 | symbol again with only one `@' as well as without the version. | |
4911 | The effect is that references to the symbol with and without the | |
4912 | version will be matched by the default symbol in the archive. */ | |
4913 | ||
4914 | p = strchr (name, ELF_VER_CHR); | |
4915 | if (p == NULL || p[1] != ELF_VER_CHR) | |
4916 | return h; | |
4917 | ||
4918 | /* First check with only one `@'. */ | |
4919 | len = strlen (name); | |
a50b1753 | 4920 | copy = (char *) bfd_alloc (abfd, len); |
8387904d AM |
4921 | if (copy == NULL) |
4922 | return (struct elf_link_hash_entry *) 0 - 1; | |
4923 | ||
4924 | first = p - name + 1; | |
4925 | memcpy (copy, name, first); | |
4926 | memcpy (copy + first, name + first + 1, len - first); | |
4927 | ||
2a41f396 | 4928 | h = elf_link_hash_lookup (elf_hash_table (info), copy, FALSE, FALSE, TRUE); |
8387904d AM |
4929 | if (h == NULL) |
4930 | { | |
4931 | /* We also need to check references to the symbol without the | |
4932 | version. */ | |
4933 | copy[first - 1] = '\0'; | |
4934 | h = elf_link_hash_lookup (elf_hash_table (info), copy, | |
2a41f396 | 4935 | FALSE, FALSE, TRUE); |
8387904d AM |
4936 | } |
4937 | ||
4938 | bfd_release (abfd, copy); | |
4939 | return h; | |
4940 | } | |
4941 | ||
0ad989f9 L |
4942 | /* Add symbols from an ELF archive file to the linker hash table. We |
4943 | don't use _bfd_generic_link_add_archive_symbols because of a | |
4944 | problem which arises on UnixWare. The UnixWare libc.so is an | |
4945 | archive which includes an entry libc.so.1 which defines a bunch of | |
4946 | symbols. The libc.so archive also includes a number of other | |
4947 | object files, which also define symbols, some of which are the same | |
4948 | as those defined in libc.so.1. Correct linking requires that we | |
4949 | consider each object file in turn, and include it if it defines any | |
4950 | symbols we need. _bfd_generic_link_add_archive_symbols does not do | |
4951 | this; it looks through the list of undefined symbols, and includes | |
4952 | any object file which defines them. When this algorithm is used on | |
4953 | UnixWare, it winds up pulling in libc.so.1 early and defining a | |
4954 | bunch of symbols. This means that some of the other objects in the | |
4955 | archive are not included in the link, which is incorrect since they | |
4956 | precede libc.so.1 in the archive. | |
4957 | ||
4958 | Fortunately, ELF archive handling is simpler than that done by | |
4959 | _bfd_generic_link_add_archive_symbols, which has to allow for a.out | |
4960 | oddities. In ELF, if we find a symbol in the archive map, and the | |
4961 | symbol is currently undefined, we know that we must pull in that | |
4962 | object file. | |
4963 | ||
4964 | Unfortunately, we do have to make multiple passes over the symbol | |
4965 | table until nothing further is resolved. */ | |
4966 | ||
4ad4eba5 AM |
4967 | static bfd_boolean |
4968 | elf_link_add_archive_symbols (bfd *abfd, struct bfd_link_info *info) | |
0ad989f9 L |
4969 | { |
4970 | symindex c; | |
4971 | bfd_boolean *defined = NULL; | |
4972 | bfd_boolean *included = NULL; | |
4973 | carsym *symdefs; | |
4974 | bfd_boolean loop; | |
4975 | bfd_size_type amt; | |
8387904d AM |
4976 | const struct elf_backend_data *bed; |
4977 | struct elf_link_hash_entry * (*archive_symbol_lookup) | |
4978 | (bfd *, struct bfd_link_info *, const char *); | |
0ad989f9 L |
4979 | |
4980 | if (! bfd_has_map (abfd)) | |
4981 | { | |
4982 | /* An empty archive is a special case. */ | |
4983 | if (bfd_openr_next_archived_file (abfd, NULL) == NULL) | |
4984 | return TRUE; | |
4985 | bfd_set_error (bfd_error_no_armap); | |
4986 | return FALSE; | |
4987 | } | |
4988 | ||
4989 | /* Keep track of all symbols we know to be already defined, and all | |
4990 | files we know to be already included. This is to speed up the | |
4991 | second and subsequent passes. */ | |
4992 | c = bfd_ardata (abfd)->symdef_count; | |
4993 | if (c == 0) | |
4994 | return TRUE; | |
4995 | amt = c; | |
4996 | amt *= sizeof (bfd_boolean); | |
a50b1753 NC |
4997 | defined = (bfd_boolean *) bfd_zmalloc (amt); |
4998 | included = (bfd_boolean *) bfd_zmalloc (amt); | |
0ad989f9 L |
4999 | if (defined == NULL || included == NULL) |
5000 | goto error_return; | |
5001 | ||
5002 | symdefs = bfd_ardata (abfd)->symdefs; | |
8387904d AM |
5003 | bed = get_elf_backend_data (abfd); |
5004 | archive_symbol_lookup = bed->elf_backend_archive_symbol_lookup; | |
0ad989f9 L |
5005 | |
5006 | do | |
5007 | { | |
5008 | file_ptr last; | |
5009 | symindex i; | |
5010 | carsym *symdef; | |
5011 | carsym *symdefend; | |
5012 | ||
5013 | loop = FALSE; | |
5014 | last = -1; | |
5015 | ||
5016 | symdef = symdefs; | |
5017 | symdefend = symdef + c; | |
5018 | for (i = 0; symdef < symdefend; symdef++, i++) | |
5019 | { | |
5020 | struct elf_link_hash_entry *h; | |
5021 | bfd *element; | |
5022 | struct bfd_link_hash_entry *undefs_tail; | |
5023 | symindex mark; | |
5024 | ||
5025 | if (defined[i] || included[i]) | |
5026 | continue; | |
5027 | if (symdef->file_offset == last) | |
5028 | { | |
5029 | included[i] = TRUE; | |
5030 | continue; | |
5031 | } | |
5032 | ||
8387904d AM |
5033 | h = archive_symbol_lookup (abfd, info, symdef->name); |
5034 | if (h == (struct elf_link_hash_entry *) 0 - 1) | |
5035 | goto error_return; | |
0ad989f9 L |
5036 | |
5037 | if (h == NULL) | |
5038 | continue; | |
5039 | ||
5040 | if (h->root.type == bfd_link_hash_common) | |
5041 | { | |
5042 | /* We currently have a common symbol. The archive map contains | |
5043 | a reference to this symbol, so we may want to include it. We | |
5044 | only want to include it however, if this archive element | |
5045 | contains a definition of the symbol, not just another common | |
5046 | declaration of it. | |
5047 | ||
5048 | Unfortunately some archivers (including GNU ar) will put | |
5049 | declarations of common symbols into their archive maps, as | |
5050 | well as real definitions, so we cannot just go by the archive | |
5051 | map alone. Instead we must read in the element's symbol | |
5052 | table and check that to see what kind of symbol definition | |
5053 | this is. */ | |
5054 | if (! elf_link_is_defined_archive_symbol (abfd, symdef)) | |
5055 | continue; | |
5056 | } | |
5057 | else if (h->root.type != bfd_link_hash_undefined) | |
5058 | { | |
5059 | if (h->root.type != bfd_link_hash_undefweak) | |
5060 | defined[i] = TRUE; | |
5061 | continue; | |
5062 | } | |
5063 | ||
5064 | /* We need to include this archive member. */ | |
5065 | element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset); | |
5066 | if (element == NULL) | |
5067 | goto error_return; | |
5068 | ||
5069 | if (! bfd_check_format (element, bfd_object)) | |
5070 | goto error_return; | |
5071 | ||
5072 | /* Doublecheck that we have not included this object | |
5073 | already--it should be impossible, but there may be | |
5074 | something wrong with the archive. */ | |
5075 | if (element->archive_pass != 0) | |
5076 | { | |
5077 | bfd_set_error (bfd_error_bad_value); | |
5078 | goto error_return; | |
5079 | } | |
5080 | element->archive_pass = 1; | |
5081 | ||
5082 | undefs_tail = info->hash->undefs_tail; | |
5083 | ||
0e144ba7 AM |
5084 | if (!(*info->callbacks |
5085 | ->add_archive_element) (info, element, symdef->name, &element)) | |
0ad989f9 | 5086 | goto error_return; |
0e144ba7 | 5087 | if (!bfd_link_add_symbols (element, info)) |
0ad989f9 L |
5088 | goto error_return; |
5089 | ||
5090 | /* If there are any new undefined symbols, we need to make | |
5091 | another pass through the archive in order to see whether | |
5092 | they can be defined. FIXME: This isn't perfect, because | |
5093 | common symbols wind up on undefs_tail and because an | |
5094 | undefined symbol which is defined later on in this pass | |
5095 | does not require another pass. This isn't a bug, but it | |
5096 | does make the code less efficient than it could be. */ | |
5097 | if (undefs_tail != info->hash->undefs_tail) | |
5098 | loop = TRUE; | |
5099 | ||
5100 | /* Look backward to mark all symbols from this object file | |
5101 | which we have already seen in this pass. */ | |
5102 | mark = i; | |
5103 | do | |
5104 | { | |
5105 | included[mark] = TRUE; | |
5106 | if (mark == 0) | |
5107 | break; | |
5108 | --mark; | |
5109 | } | |
5110 | while (symdefs[mark].file_offset == symdef->file_offset); | |
5111 | ||
5112 | /* We mark subsequent symbols from this object file as we go | |
5113 | on through the loop. */ | |
5114 | last = symdef->file_offset; | |
5115 | } | |
5116 | } | |
5117 | while (loop); | |
5118 | ||
5119 | free (defined); | |
5120 | free (included); | |
5121 | ||
5122 | return TRUE; | |
5123 | ||
5124 | error_return: | |
5125 | if (defined != NULL) | |
5126 | free (defined); | |
5127 | if (included != NULL) | |
5128 | free (included); | |
5129 | return FALSE; | |
5130 | } | |
4ad4eba5 AM |
5131 | |
5132 | /* Given an ELF BFD, add symbols to the global hash table as | |
5133 | appropriate. */ | |
5134 | ||
5135 | bfd_boolean | |
5136 | bfd_elf_link_add_symbols (bfd *abfd, struct bfd_link_info *info) | |
5137 | { | |
5138 | switch (bfd_get_format (abfd)) | |
5139 | { | |
5140 | case bfd_object: | |
5141 | return elf_link_add_object_symbols (abfd, info); | |
5142 | case bfd_archive: | |
5143 | return elf_link_add_archive_symbols (abfd, info); | |
5144 | default: | |
5145 | bfd_set_error (bfd_error_wrong_format); | |
5146 | return FALSE; | |
5147 | } | |
5148 | } | |
5a580b3a | 5149 | \f |
14b1c01e AM |
5150 | struct hash_codes_info |
5151 | { | |
5152 | unsigned long *hashcodes; | |
5153 | bfd_boolean error; | |
5154 | }; | |
a0c8462f | 5155 | |
5a580b3a AM |
5156 | /* This function will be called though elf_link_hash_traverse to store |
5157 | all hash value of the exported symbols in an array. */ | |
5158 | ||
5159 | static bfd_boolean | |
5160 | elf_collect_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5161 | { | |
a50b1753 | 5162 | struct hash_codes_info *inf = (struct hash_codes_info *) data; |
5a580b3a AM |
5163 | const char *name; |
5164 | char *p; | |
5165 | unsigned long ha; | |
5166 | char *alc = NULL; | |
5167 | ||
5a580b3a AM |
5168 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5169 | if (h->dynindx == -1) | |
5170 | return TRUE; | |
5171 | ||
5172 | name = h->root.root.string; | |
5173 | p = strchr (name, ELF_VER_CHR); | |
5174 | if (p != NULL) | |
5175 | { | |
a50b1753 | 5176 | alc = (char *) bfd_malloc (p - name + 1); |
14b1c01e AM |
5177 | if (alc == NULL) |
5178 | { | |
5179 | inf->error = TRUE; | |
5180 | return FALSE; | |
5181 | } | |
5a580b3a AM |
5182 | memcpy (alc, name, p - name); |
5183 | alc[p - name] = '\0'; | |
5184 | name = alc; | |
5185 | } | |
5186 | ||
5187 | /* Compute the hash value. */ | |
5188 | ha = bfd_elf_hash (name); | |
5189 | ||
5190 | /* Store the found hash value in the array given as the argument. */ | |
14b1c01e | 5191 | *(inf->hashcodes)++ = ha; |
5a580b3a AM |
5192 | |
5193 | /* And store it in the struct so that we can put it in the hash table | |
5194 | later. */ | |
f6e332e6 | 5195 | h->u.elf_hash_value = ha; |
5a580b3a AM |
5196 | |
5197 | if (alc != NULL) | |
5198 | free (alc); | |
5199 | ||
5200 | return TRUE; | |
5201 | } | |
5202 | ||
fdc90cb4 JJ |
5203 | struct collect_gnu_hash_codes |
5204 | { | |
5205 | bfd *output_bfd; | |
5206 | const struct elf_backend_data *bed; | |
5207 | unsigned long int nsyms; | |
5208 | unsigned long int maskbits; | |
5209 | unsigned long int *hashcodes; | |
5210 | unsigned long int *hashval; | |
5211 | unsigned long int *indx; | |
5212 | unsigned long int *counts; | |
5213 | bfd_vma *bitmask; | |
5214 | bfd_byte *contents; | |
5215 | long int min_dynindx; | |
5216 | unsigned long int bucketcount; | |
5217 | unsigned long int symindx; | |
5218 | long int local_indx; | |
5219 | long int shift1, shift2; | |
5220 | unsigned long int mask; | |
14b1c01e | 5221 | bfd_boolean error; |
fdc90cb4 JJ |
5222 | }; |
5223 | ||
5224 | /* This function will be called though elf_link_hash_traverse to store | |
5225 | all hash value of the exported symbols in an array. */ | |
5226 | ||
5227 | static bfd_boolean | |
5228 | elf_collect_gnu_hash_codes (struct elf_link_hash_entry *h, void *data) | |
5229 | { | |
a50b1753 | 5230 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5231 | const char *name; |
5232 | char *p; | |
5233 | unsigned long ha; | |
5234 | char *alc = NULL; | |
5235 | ||
fdc90cb4 JJ |
5236 | /* Ignore indirect symbols. These are added by the versioning code. */ |
5237 | if (h->dynindx == -1) | |
5238 | return TRUE; | |
5239 | ||
5240 | /* Ignore also local symbols and undefined symbols. */ | |
5241 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5242 | return TRUE; | |
5243 | ||
5244 | name = h->root.root.string; | |
5245 | p = strchr (name, ELF_VER_CHR); | |
5246 | if (p != NULL) | |
5247 | { | |
a50b1753 | 5248 | alc = (char *) bfd_malloc (p - name + 1); |
14b1c01e AM |
5249 | if (alc == NULL) |
5250 | { | |
5251 | s->error = TRUE; | |
5252 | return FALSE; | |
5253 | } | |
fdc90cb4 JJ |
5254 | memcpy (alc, name, p - name); |
5255 | alc[p - name] = '\0'; | |
5256 | name = alc; | |
5257 | } | |
5258 | ||
5259 | /* Compute the hash value. */ | |
5260 | ha = bfd_elf_gnu_hash (name); | |
5261 | ||
5262 | /* Store the found hash value in the array for compute_bucket_count, | |
5263 | and also for .dynsym reordering purposes. */ | |
5264 | s->hashcodes[s->nsyms] = ha; | |
5265 | s->hashval[h->dynindx] = ha; | |
5266 | ++s->nsyms; | |
5267 | if (s->min_dynindx < 0 || s->min_dynindx > h->dynindx) | |
5268 | s->min_dynindx = h->dynindx; | |
5269 | ||
5270 | if (alc != NULL) | |
5271 | free (alc); | |
5272 | ||
5273 | return TRUE; | |
5274 | } | |
5275 | ||
5276 | /* This function will be called though elf_link_hash_traverse to do | |
5277 | final dynaminc symbol renumbering. */ | |
5278 | ||
5279 | static bfd_boolean | |
5280 | elf_renumber_gnu_hash_syms (struct elf_link_hash_entry *h, void *data) | |
5281 | { | |
a50b1753 | 5282 | struct collect_gnu_hash_codes *s = (struct collect_gnu_hash_codes *) data; |
fdc90cb4 JJ |
5283 | unsigned long int bucket; |
5284 | unsigned long int val; | |
5285 | ||
fdc90cb4 JJ |
5286 | /* Ignore indirect symbols. */ |
5287 | if (h->dynindx == -1) | |
5288 | return TRUE; | |
5289 | ||
5290 | /* Ignore also local symbols and undefined symbols. */ | |
5291 | if (! (*s->bed->elf_hash_symbol) (h)) | |
5292 | { | |
5293 | if (h->dynindx >= s->min_dynindx) | |
5294 | h->dynindx = s->local_indx++; | |
5295 | return TRUE; | |
5296 | } | |
5297 | ||
5298 | bucket = s->hashval[h->dynindx] % s->bucketcount; | |
5299 | val = (s->hashval[h->dynindx] >> s->shift1) | |
5300 | & ((s->maskbits >> s->shift1) - 1); | |
5301 | s->bitmask[val] |= ((bfd_vma) 1) << (s->hashval[h->dynindx] & s->mask); | |
5302 | s->bitmask[val] | |
5303 | |= ((bfd_vma) 1) << ((s->hashval[h->dynindx] >> s->shift2) & s->mask); | |
5304 | val = s->hashval[h->dynindx] & ~(unsigned long int) 1; | |
5305 | if (s->counts[bucket] == 1) | |
5306 | /* Last element terminates the chain. */ | |
5307 | val |= 1; | |
5308 | bfd_put_32 (s->output_bfd, val, | |
5309 | s->contents + (s->indx[bucket] - s->symindx) * 4); | |
5310 | --s->counts[bucket]; | |
5311 | h->dynindx = s->indx[bucket]++; | |
5312 | return TRUE; | |
5313 | } | |
5314 | ||
5315 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ | |
5316 | ||
5317 | bfd_boolean | |
5318 | _bfd_elf_hash_symbol (struct elf_link_hash_entry *h) | |
5319 | { | |
5320 | return !(h->forced_local | |
5321 | || h->root.type == bfd_link_hash_undefined | |
5322 | || h->root.type == bfd_link_hash_undefweak | |
5323 | || ((h->root.type == bfd_link_hash_defined | |
5324 | || h->root.type == bfd_link_hash_defweak) | |
5325 | && h->root.u.def.section->output_section == NULL)); | |
5326 | } | |
5327 | ||
5a580b3a AM |
5328 | /* Array used to determine the number of hash table buckets to use |
5329 | based on the number of symbols there are. If there are fewer than | |
5330 | 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets, | |
5331 | fewer than 37 we use 17 buckets, and so forth. We never use more | |
5332 | than 32771 buckets. */ | |
5333 | ||
5334 | static const size_t elf_buckets[] = | |
5335 | { | |
5336 | 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209, | |
5337 | 16411, 32771, 0 | |
5338 | }; | |
5339 | ||
5340 | /* Compute bucket count for hashing table. We do not use a static set | |
5341 | of possible tables sizes anymore. Instead we determine for all | |
5342 | possible reasonable sizes of the table the outcome (i.e., the | |
5343 | number of collisions etc) and choose the best solution. The | |
5344 | weighting functions are not too simple to allow the table to grow | |
5345 | without bounds. Instead one of the weighting factors is the size. | |
5346 | Therefore the result is always a good payoff between few collisions | |
5347 | (= short chain lengths) and table size. */ | |
5348 | static size_t | |
b20dd2ce | 5349 | compute_bucket_count (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
d40f3da9 AM |
5350 | unsigned long int *hashcodes ATTRIBUTE_UNUSED, |
5351 | unsigned long int nsyms, | |
5352 | int gnu_hash) | |
5a580b3a | 5353 | { |
5a580b3a | 5354 | size_t best_size = 0; |
5a580b3a | 5355 | unsigned long int i; |
5a580b3a | 5356 | |
5a580b3a AM |
5357 | /* We have a problem here. The following code to optimize the table |
5358 | size requires an integer type with more the 32 bits. If | |
5359 | BFD_HOST_U_64_BIT is set we know about such a type. */ | |
5360 | #ifdef BFD_HOST_U_64_BIT | |
5361 | if (info->optimize) | |
5362 | { | |
5a580b3a AM |
5363 | size_t minsize; |
5364 | size_t maxsize; | |
5365 | BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0); | |
5a580b3a | 5366 | bfd *dynobj = elf_hash_table (info)->dynobj; |
d40f3da9 | 5367 | size_t dynsymcount = elf_hash_table (info)->dynsymcount; |
5a580b3a | 5368 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); |
fdc90cb4 | 5369 | unsigned long int *counts; |
d40f3da9 | 5370 | bfd_size_type amt; |
0883b6e0 | 5371 | unsigned int no_improvement_count = 0; |
5a580b3a AM |
5372 | |
5373 | /* Possible optimization parameters: if we have NSYMS symbols we say | |
5374 | that the hashing table must at least have NSYMS/4 and at most | |
5375 | 2*NSYMS buckets. */ | |
5376 | minsize = nsyms / 4; | |
5377 | if (minsize == 0) | |
5378 | minsize = 1; | |
5379 | best_size = maxsize = nsyms * 2; | |
fdc90cb4 JJ |
5380 | if (gnu_hash) |
5381 | { | |
5382 | if (minsize < 2) | |
5383 | minsize = 2; | |
5384 | if ((best_size & 31) == 0) | |
5385 | ++best_size; | |
5386 | } | |
5a580b3a AM |
5387 | |
5388 | /* Create array where we count the collisions in. We must use bfd_malloc | |
5389 | since the size could be large. */ | |
5390 | amt = maxsize; | |
5391 | amt *= sizeof (unsigned long int); | |
a50b1753 | 5392 | counts = (unsigned long int *) bfd_malloc (amt); |
5a580b3a | 5393 | if (counts == NULL) |
fdc90cb4 | 5394 | return 0; |
5a580b3a AM |
5395 | |
5396 | /* Compute the "optimal" size for the hash table. The criteria is a | |
5397 | minimal chain length. The minor criteria is (of course) the size | |
5398 | of the table. */ | |
5399 | for (i = minsize; i < maxsize; ++i) | |
5400 | { | |
5401 | /* Walk through the array of hashcodes and count the collisions. */ | |
5402 | BFD_HOST_U_64_BIT max; | |
5403 | unsigned long int j; | |
5404 | unsigned long int fact; | |
5405 | ||
fdc90cb4 JJ |
5406 | if (gnu_hash && (i & 31) == 0) |
5407 | continue; | |
5408 | ||
5a580b3a AM |
5409 | memset (counts, '\0', i * sizeof (unsigned long int)); |
5410 | ||
5411 | /* Determine how often each hash bucket is used. */ | |
5412 | for (j = 0; j < nsyms; ++j) | |
5413 | ++counts[hashcodes[j] % i]; | |
5414 | ||
5415 | /* For the weight function we need some information about the | |
5416 | pagesize on the target. This is information need not be 100% | |
5417 | accurate. Since this information is not available (so far) we | |
5418 | define it here to a reasonable default value. If it is crucial | |
5419 | to have a better value some day simply define this value. */ | |
5420 | # ifndef BFD_TARGET_PAGESIZE | |
5421 | # define BFD_TARGET_PAGESIZE (4096) | |
5422 | # endif | |
5423 | ||
fdc90cb4 JJ |
5424 | /* We in any case need 2 + DYNSYMCOUNT entries for the size values |
5425 | and the chains. */ | |
5426 | max = (2 + dynsymcount) * bed->s->sizeof_hash_entry; | |
5a580b3a AM |
5427 | |
5428 | # if 1 | |
5429 | /* Variant 1: optimize for short chains. We add the squares | |
5430 | of all the chain lengths (which favors many small chain | |
5431 | over a few long chains). */ | |
5432 | for (j = 0; j < i; ++j) | |
5433 | max += counts[j] * counts[j]; | |
5434 | ||
5435 | /* This adds penalties for the overall size of the table. */ | |
fdc90cb4 | 5436 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5437 | max *= fact * fact; |
5438 | # else | |
5439 | /* Variant 2: Optimize a lot more for small table. Here we | |
5440 | also add squares of the size but we also add penalties for | |
5441 | empty slots (the +1 term). */ | |
5442 | for (j = 0; j < i; ++j) | |
5443 | max += (1 + counts[j]) * (1 + counts[j]); | |
5444 | ||
5445 | /* The overall size of the table is considered, but not as | |
5446 | strong as in variant 1, where it is squared. */ | |
fdc90cb4 | 5447 | fact = i / (BFD_TARGET_PAGESIZE / bed->s->sizeof_hash_entry) + 1; |
5a580b3a AM |
5448 | max *= fact; |
5449 | # endif | |
5450 | ||
5451 | /* Compare with current best results. */ | |
5452 | if (max < best_chlen) | |
5453 | { | |
5454 | best_chlen = max; | |
5455 | best_size = i; | |
0883b6e0 | 5456 | no_improvement_count = 0; |
5a580b3a | 5457 | } |
0883b6e0 NC |
5458 | /* PR 11843: Avoid futile long searches for the best bucket size |
5459 | when there are a large number of symbols. */ | |
5460 | else if (++no_improvement_count == 100) | |
5461 | break; | |
5a580b3a AM |
5462 | } |
5463 | ||
5464 | free (counts); | |
5465 | } | |
5466 | else | |
5467 | #endif /* defined (BFD_HOST_U_64_BIT) */ | |
5468 | { | |
5469 | /* This is the fallback solution if no 64bit type is available or if we | |
5470 | are not supposed to spend much time on optimizations. We select the | |
5471 | bucket count using a fixed set of numbers. */ | |
5472 | for (i = 0; elf_buckets[i] != 0; i++) | |
5473 | { | |
5474 | best_size = elf_buckets[i]; | |
fdc90cb4 | 5475 | if (nsyms < elf_buckets[i + 1]) |
5a580b3a AM |
5476 | break; |
5477 | } | |
fdc90cb4 JJ |
5478 | if (gnu_hash && best_size < 2) |
5479 | best_size = 2; | |
5a580b3a AM |
5480 | } |
5481 | ||
5a580b3a AM |
5482 | return best_size; |
5483 | } | |
5484 | ||
d0bf826b AM |
5485 | /* Size any SHT_GROUP section for ld -r. */ |
5486 | ||
5487 | bfd_boolean | |
5488 | _bfd_elf_size_group_sections (struct bfd_link_info *info) | |
5489 | { | |
5490 | bfd *ibfd; | |
5491 | ||
5492 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
5493 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour | |
5494 | && !_bfd_elf_fixup_group_sections (ibfd, bfd_abs_section_ptr)) | |
5495 | return FALSE; | |
5496 | return TRUE; | |
5497 | } | |
5498 | ||
04c3a755 NS |
5499 | /* Set a default stack segment size. The value in INFO wins. If it |
5500 | is unset, LEGACY_SYMBOL's value is used, and if that symbol is | |
5501 | undefined it is initialized. */ | |
5502 | ||
5503 | bfd_boolean | |
5504 | bfd_elf_stack_segment_size (bfd *output_bfd, | |
5505 | struct bfd_link_info *info, | |
5506 | const char *legacy_symbol, | |
5507 | bfd_vma default_size) | |
5508 | { | |
5509 | struct elf_link_hash_entry *h = NULL; | |
5510 | ||
5511 | /* Look for legacy symbol. */ | |
5512 | if (legacy_symbol) | |
5513 | h = elf_link_hash_lookup (elf_hash_table (info), legacy_symbol, | |
5514 | FALSE, FALSE, FALSE); | |
5515 | if (h && (h->root.type == bfd_link_hash_defined | |
5516 | || h->root.type == bfd_link_hash_defweak) | |
5517 | && h->def_regular | |
5518 | && (h->type == STT_NOTYPE || h->type == STT_OBJECT)) | |
5519 | { | |
5520 | /* The symbol has no type if specified on the command line. */ | |
5521 | h->type = STT_OBJECT; | |
5522 | if (info->stacksize) | |
5523 | (*_bfd_error_handler) (_("%B: stack size specified and %s set"), | |
5524 | output_bfd, legacy_symbol); | |
5525 | else if (h->root.u.def.section != bfd_abs_section_ptr) | |
5526 | (*_bfd_error_handler) (_("%B: %s not absolute"), | |
5527 | output_bfd, legacy_symbol); | |
5528 | else | |
5529 | info->stacksize = h->root.u.def.value; | |
5530 | } | |
5531 | ||
5532 | if (!info->stacksize) | |
5533 | /* If the user didn't set a size, or explicitly inhibit the | |
5534 | size, set it now. */ | |
5535 | info->stacksize = default_size; | |
5536 | ||
5537 | /* Provide the legacy symbol, if it is referenced. */ | |
5538 | if (h && (h->root.type == bfd_link_hash_undefined | |
5539 | || h->root.type == bfd_link_hash_undefweak)) | |
5540 | { | |
5541 | struct bfd_link_hash_entry *bh = NULL; | |
5542 | ||
5543 | if (!(_bfd_generic_link_add_one_symbol | |
5544 | (info, output_bfd, legacy_symbol, | |
5545 | BSF_GLOBAL, bfd_abs_section_ptr, | |
5546 | info->stacksize >= 0 ? info->stacksize : 0, | |
5547 | NULL, FALSE, get_elf_backend_data (output_bfd)->collect, &bh))) | |
5548 | return FALSE; | |
5549 | ||
5550 | h = (struct elf_link_hash_entry *) bh; | |
5551 | h->def_regular = 1; | |
5552 | h->type = STT_OBJECT; | |
5553 | } | |
5554 | ||
5555 | return TRUE; | |
5556 | } | |
5557 | ||
5a580b3a AM |
5558 | /* Set up the sizes and contents of the ELF dynamic sections. This is |
5559 | called by the ELF linker emulation before_allocation routine. We | |
5560 | must set the sizes of the sections before the linker sets the | |
5561 | addresses of the various sections. */ | |
5562 | ||
5563 | bfd_boolean | |
5564 | bfd_elf_size_dynamic_sections (bfd *output_bfd, | |
5565 | const char *soname, | |
5566 | const char *rpath, | |
5567 | const char *filter_shlib, | |
7ee314fa AM |
5568 | const char *audit, |
5569 | const char *depaudit, | |
5a580b3a AM |
5570 | const char * const *auxiliary_filters, |
5571 | struct bfd_link_info *info, | |
fd91d419 | 5572 | asection **sinterpptr) |
5a580b3a AM |
5573 | { |
5574 | bfd_size_type soname_indx; | |
5575 | bfd *dynobj; | |
5576 | const struct elf_backend_data *bed; | |
28caa186 | 5577 | struct elf_info_failed asvinfo; |
5a580b3a AM |
5578 | |
5579 | *sinterpptr = NULL; | |
5580 | ||
5581 | soname_indx = (bfd_size_type) -1; | |
5582 | ||
5583 | if (!is_elf_hash_table (info->hash)) | |
5584 | return TRUE; | |
5585 | ||
6bfdb61b | 5586 | bed = get_elf_backend_data (output_bfd); |
04c3a755 NS |
5587 | |
5588 | /* Any syms created from now on start with -1 in | |
5589 | got.refcount/offset and plt.refcount/offset. */ | |
5590 | elf_hash_table (info)->init_got_refcount | |
5591 | = elf_hash_table (info)->init_got_offset; | |
5592 | elf_hash_table (info)->init_plt_refcount | |
5593 | = elf_hash_table (info)->init_plt_offset; | |
5594 | ||
5595 | if (info->relocatable | |
5596 | && !_bfd_elf_size_group_sections (info)) | |
5597 | return FALSE; | |
5598 | ||
5599 | /* The backend may have to create some sections regardless of whether | |
5600 | we're dynamic or not. */ | |
5601 | if (bed->elf_backend_always_size_sections | |
5602 | && ! (*bed->elf_backend_always_size_sections) (output_bfd, info)) | |
5603 | return FALSE; | |
5604 | ||
5605 | /* Determine any GNU_STACK segment requirements, after the backend | |
5606 | has had a chance to set a default segment size. */ | |
5a580b3a | 5607 | if (info->execstack) |
12bd6957 | 5608 | elf_stack_flags (output_bfd) = PF_R | PF_W | PF_X; |
5a580b3a | 5609 | else if (info->noexecstack) |
12bd6957 | 5610 | elf_stack_flags (output_bfd) = PF_R | PF_W; |
5a580b3a AM |
5611 | else |
5612 | { | |
5613 | bfd *inputobj; | |
5614 | asection *notesec = NULL; | |
5615 | int exec = 0; | |
5616 | ||
5617 | for (inputobj = info->input_bfds; | |
5618 | inputobj; | |
5619 | inputobj = inputobj->link_next) | |
5620 | { | |
5621 | asection *s; | |
5622 | ||
a92c088a L |
5623 | if (inputobj->flags |
5624 | & (DYNAMIC | EXEC_P | BFD_PLUGIN | BFD_LINKER_CREATED)) | |
5a580b3a AM |
5625 | continue; |
5626 | s = bfd_get_section_by_name (inputobj, ".note.GNU-stack"); | |
5627 | if (s) | |
5628 | { | |
5629 | if (s->flags & SEC_CODE) | |
5630 | exec = PF_X; | |
5631 | notesec = s; | |
5632 | } | |
6bfdb61b | 5633 | else if (bed->default_execstack) |
5a580b3a AM |
5634 | exec = PF_X; |
5635 | } | |
04c3a755 | 5636 | if (notesec || info->stacksize > 0) |
12bd6957 | 5637 | elf_stack_flags (output_bfd) = PF_R | PF_W | exec; |
04c3a755 NS |
5638 | if (notesec && exec && info->relocatable |
5639 | && notesec->output_section != bfd_abs_section_ptr) | |
5640 | notesec->output_section->flags |= SEC_CODE; | |
5a580b3a AM |
5641 | } |
5642 | ||
5a580b3a AM |
5643 | dynobj = elf_hash_table (info)->dynobj; |
5644 | ||
9a2a56cc | 5645 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) |
5a580b3a AM |
5646 | { |
5647 | struct elf_info_failed eif; | |
5648 | struct elf_link_hash_entry *h; | |
5649 | asection *dynstr; | |
5650 | struct bfd_elf_version_tree *t; | |
5651 | struct bfd_elf_version_expr *d; | |
046183de | 5652 | asection *s; |
5a580b3a AM |
5653 | bfd_boolean all_defined; |
5654 | ||
3d4d4302 | 5655 | *sinterpptr = bfd_get_linker_section (dynobj, ".interp"); |
5a580b3a AM |
5656 | BFD_ASSERT (*sinterpptr != NULL || !info->executable); |
5657 | ||
5658 | if (soname != NULL) | |
5659 | { | |
5660 | soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5661 | soname, TRUE); | |
5662 | if (soname_indx == (bfd_size_type) -1 | |
5663 | || !_bfd_elf_add_dynamic_entry (info, DT_SONAME, soname_indx)) | |
5664 | return FALSE; | |
5665 | } | |
5666 | ||
5667 | if (info->symbolic) | |
5668 | { | |
5669 | if (!_bfd_elf_add_dynamic_entry (info, DT_SYMBOLIC, 0)) | |
5670 | return FALSE; | |
5671 | info->flags |= DF_SYMBOLIC; | |
5672 | } | |
5673 | ||
5674 | if (rpath != NULL) | |
5675 | { | |
5676 | bfd_size_type indx; | |
b1b00fcc | 5677 | bfd_vma tag; |
5a580b3a AM |
5678 | |
5679 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath, | |
5680 | TRUE); | |
b1b00fcc | 5681 | if (indx == (bfd_size_type) -1) |
5a580b3a AM |
5682 | return FALSE; |
5683 | ||
b1b00fcc MF |
5684 | tag = info->new_dtags ? DT_RUNPATH : DT_RPATH; |
5685 | if (!_bfd_elf_add_dynamic_entry (info, tag, indx)) | |
5686 | return FALSE; | |
5a580b3a AM |
5687 | } |
5688 | ||
5689 | if (filter_shlib != NULL) | |
5690 | { | |
5691 | bfd_size_type indx; | |
5692 | ||
5693 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5694 | filter_shlib, TRUE); | |
5695 | if (indx == (bfd_size_type) -1 | |
5696 | || !_bfd_elf_add_dynamic_entry (info, DT_FILTER, indx)) | |
5697 | return FALSE; | |
5698 | } | |
5699 | ||
5700 | if (auxiliary_filters != NULL) | |
5701 | { | |
5702 | const char * const *p; | |
5703 | ||
5704 | for (p = auxiliary_filters; *p != NULL; p++) | |
5705 | { | |
5706 | bfd_size_type indx; | |
5707 | ||
5708 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
5709 | *p, TRUE); | |
5710 | if (indx == (bfd_size_type) -1 | |
5711 | || !_bfd_elf_add_dynamic_entry (info, DT_AUXILIARY, indx)) | |
5712 | return FALSE; | |
5713 | } | |
5714 | } | |
5715 | ||
7ee314fa AM |
5716 | if (audit != NULL) |
5717 | { | |
5718 | bfd_size_type indx; | |
5719 | ||
5720 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, audit, | |
5721 | TRUE); | |
5722 | if (indx == (bfd_size_type) -1 | |
5723 | || !_bfd_elf_add_dynamic_entry (info, DT_AUDIT, indx)) | |
5724 | return FALSE; | |
5725 | } | |
5726 | ||
5727 | if (depaudit != NULL) | |
5728 | { | |
5729 | bfd_size_type indx; | |
5730 | ||
5731 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, depaudit, | |
5732 | TRUE); | |
5733 | if (indx == (bfd_size_type) -1 | |
5734 | || !_bfd_elf_add_dynamic_entry (info, DT_DEPAUDIT, indx)) | |
5735 | return FALSE; | |
5736 | } | |
5737 | ||
5a580b3a | 5738 | eif.info = info; |
5a580b3a AM |
5739 | eif.failed = FALSE; |
5740 | ||
5741 | /* If we are supposed to export all symbols into the dynamic symbol | |
5742 | table (this is not the normal case), then do so. */ | |
55255dae L |
5743 | if (info->export_dynamic |
5744 | || (info->executable && info->dynamic)) | |
5a580b3a AM |
5745 | { |
5746 | elf_link_hash_traverse (elf_hash_table (info), | |
5747 | _bfd_elf_export_symbol, | |
5748 | &eif); | |
5749 | if (eif.failed) | |
5750 | return FALSE; | |
5751 | } | |
5752 | ||
5753 | /* Make all global versions with definition. */ | |
fd91d419 | 5754 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 5755 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 5756 | if (!d->symver && d->literal) |
5a580b3a AM |
5757 | { |
5758 | const char *verstr, *name; | |
5759 | size_t namelen, verlen, newlen; | |
93252b1c | 5760 | char *newname, *p, leading_char; |
5a580b3a AM |
5761 | struct elf_link_hash_entry *newh; |
5762 | ||
93252b1c | 5763 | leading_char = bfd_get_symbol_leading_char (output_bfd); |
ae5a3597 | 5764 | name = d->pattern; |
93252b1c | 5765 | namelen = strlen (name) + (leading_char != '\0'); |
5a580b3a AM |
5766 | verstr = t->name; |
5767 | verlen = strlen (verstr); | |
5768 | newlen = namelen + verlen + 3; | |
5769 | ||
a50b1753 | 5770 | newname = (char *) bfd_malloc (newlen); |
5a580b3a AM |
5771 | if (newname == NULL) |
5772 | return FALSE; | |
93252b1c MF |
5773 | newname[0] = leading_char; |
5774 | memcpy (newname + (leading_char != '\0'), name, namelen); | |
5a580b3a AM |
5775 | |
5776 | /* Check the hidden versioned definition. */ | |
5777 | p = newname + namelen; | |
5778 | *p++ = ELF_VER_CHR; | |
5779 | memcpy (p, verstr, verlen + 1); | |
5780 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5781 | newname, FALSE, FALSE, | |
5782 | FALSE); | |
5783 | if (newh == NULL | |
5784 | || (newh->root.type != bfd_link_hash_defined | |
5785 | && newh->root.type != bfd_link_hash_defweak)) | |
5786 | { | |
5787 | /* Check the default versioned definition. */ | |
5788 | *p++ = ELF_VER_CHR; | |
5789 | memcpy (p, verstr, verlen + 1); | |
5790 | newh = elf_link_hash_lookup (elf_hash_table (info), | |
5791 | newname, FALSE, FALSE, | |
5792 | FALSE); | |
5793 | } | |
5794 | free (newname); | |
5795 | ||
5796 | /* Mark this version if there is a definition and it is | |
5797 | not defined in a shared object. */ | |
5798 | if (newh != NULL | |
f5385ebf | 5799 | && !newh->def_dynamic |
5a580b3a AM |
5800 | && (newh->root.type == bfd_link_hash_defined |
5801 | || newh->root.type == bfd_link_hash_defweak)) | |
5802 | d->symver = 1; | |
5803 | } | |
5804 | ||
5805 | /* Attach all the symbols to their version information. */ | |
5a580b3a | 5806 | asvinfo.info = info; |
5a580b3a AM |
5807 | asvinfo.failed = FALSE; |
5808 | ||
5809 | elf_link_hash_traverse (elf_hash_table (info), | |
5810 | _bfd_elf_link_assign_sym_version, | |
5811 | &asvinfo); | |
5812 | if (asvinfo.failed) | |
5813 | return FALSE; | |
5814 | ||
5815 | if (!info->allow_undefined_version) | |
5816 | { | |
5817 | /* Check if all global versions have a definition. */ | |
5818 | all_defined = TRUE; | |
fd91d419 | 5819 | for (t = info->version_info; t != NULL; t = t->next) |
5a580b3a | 5820 | for (d = t->globals.list; d != NULL; d = d->next) |
ae5a3597 | 5821 | if (d->literal && !d->symver && !d->script) |
5a580b3a AM |
5822 | { |
5823 | (*_bfd_error_handler) | |
5824 | (_("%s: undefined version: %s"), | |
5825 | d->pattern, t->name); | |
5826 | all_defined = FALSE; | |
5827 | } | |
5828 | ||
5829 | if (!all_defined) | |
5830 | { | |
5831 | bfd_set_error (bfd_error_bad_value); | |
5832 | return FALSE; | |
5833 | } | |
5834 | } | |
5835 | ||
5836 | /* Find all symbols which were defined in a dynamic object and make | |
5837 | the backend pick a reasonable value for them. */ | |
5838 | elf_link_hash_traverse (elf_hash_table (info), | |
5839 | _bfd_elf_adjust_dynamic_symbol, | |
5840 | &eif); | |
5841 | if (eif.failed) | |
5842 | return FALSE; | |
5843 | ||
5844 | /* Add some entries to the .dynamic section. We fill in some of the | |
ee75fd95 | 5845 | values later, in bfd_elf_final_link, but we must add the entries |
5a580b3a AM |
5846 | now so that we know the final size of the .dynamic section. */ |
5847 | ||
5848 | /* If there are initialization and/or finalization functions to | |
5849 | call then add the corresponding DT_INIT/DT_FINI entries. */ | |
5850 | h = (info->init_function | |
5851 | ? elf_link_hash_lookup (elf_hash_table (info), | |
5852 | info->init_function, FALSE, | |
5853 | FALSE, FALSE) | |
5854 | : NULL); | |
5855 | if (h != NULL | |
f5385ebf AM |
5856 | && (h->ref_regular |
5857 | || h->def_regular)) | |
5a580b3a AM |
5858 | { |
5859 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT, 0)) | |
5860 | return FALSE; | |
5861 | } | |
5862 | h = (info->fini_function | |
5863 | ? elf_link_hash_lookup (elf_hash_table (info), | |
5864 | info->fini_function, FALSE, | |
5865 | FALSE, FALSE) | |
5866 | : NULL); | |
5867 | if (h != NULL | |
f5385ebf AM |
5868 | && (h->ref_regular |
5869 | || h->def_regular)) | |
5a580b3a AM |
5870 | { |
5871 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI, 0)) | |
5872 | return FALSE; | |
5873 | } | |
5874 | ||
046183de AM |
5875 | s = bfd_get_section_by_name (output_bfd, ".preinit_array"); |
5876 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
5877 | { |
5878 | /* DT_PREINIT_ARRAY is not allowed in shared library. */ | |
5879 | if (! info->executable) | |
5880 | { | |
5881 | bfd *sub; | |
5882 | asection *o; | |
5883 | ||
5884 | for (sub = info->input_bfds; sub != NULL; | |
5885 | sub = sub->link_next) | |
3fcd97f1 JJ |
5886 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour) |
5887 | for (o = sub->sections; o != NULL; o = o->next) | |
5888 | if (elf_section_data (o)->this_hdr.sh_type | |
5889 | == SHT_PREINIT_ARRAY) | |
5890 | { | |
5891 | (*_bfd_error_handler) | |
5892 | (_("%B: .preinit_array section is not allowed in DSO"), | |
5893 | sub); | |
5894 | break; | |
5895 | } | |
5a580b3a AM |
5896 | |
5897 | bfd_set_error (bfd_error_nonrepresentable_section); | |
5898 | return FALSE; | |
5899 | } | |
5900 | ||
5901 | if (!_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAY, 0) | |
5902 | || !_bfd_elf_add_dynamic_entry (info, DT_PREINIT_ARRAYSZ, 0)) | |
5903 | return FALSE; | |
5904 | } | |
046183de AM |
5905 | s = bfd_get_section_by_name (output_bfd, ".init_array"); |
5906 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
5907 | { |
5908 | if (!_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAY, 0) | |
5909 | || !_bfd_elf_add_dynamic_entry (info, DT_INIT_ARRAYSZ, 0)) | |
5910 | return FALSE; | |
5911 | } | |
046183de AM |
5912 | s = bfd_get_section_by_name (output_bfd, ".fini_array"); |
5913 | if (s != NULL && s->linker_has_input) | |
5a580b3a AM |
5914 | { |
5915 | if (!_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAY, 0) | |
5916 | || !_bfd_elf_add_dynamic_entry (info, DT_FINI_ARRAYSZ, 0)) | |
5917 | return FALSE; | |
5918 | } | |
5919 | ||
3d4d4302 | 5920 | dynstr = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
5921 | /* If .dynstr is excluded from the link, we don't want any of |
5922 | these tags. Strictly, we should be checking each section | |
5923 | individually; This quick check covers for the case where | |
5924 | someone does a /DISCARD/ : { *(*) }. */ | |
5925 | if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr) | |
5926 | { | |
5927 | bfd_size_type strsize; | |
5928 | ||
5929 | strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); | |
fdc90cb4 JJ |
5930 | if ((info->emit_hash |
5931 | && !_bfd_elf_add_dynamic_entry (info, DT_HASH, 0)) | |
5932 | || (info->emit_gnu_hash | |
5933 | && !_bfd_elf_add_dynamic_entry (info, DT_GNU_HASH, 0)) | |
5a580b3a AM |
5934 | || !_bfd_elf_add_dynamic_entry (info, DT_STRTAB, 0) |
5935 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMTAB, 0) | |
5936 | || !_bfd_elf_add_dynamic_entry (info, DT_STRSZ, strsize) | |
5937 | || !_bfd_elf_add_dynamic_entry (info, DT_SYMENT, | |
5938 | bed->s->sizeof_sym)) | |
5939 | return FALSE; | |
5940 | } | |
5941 | } | |
5942 | ||
5943 | /* The backend must work out the sizes of all the other dynamic | |
5944 | sections. */ | |
9a2a56cc AM |
5945 | if (dynobj != NULL |
5946 | && bed->elf_backend_size_dynamic_sections != NULL | |
5a580b3a AM |
5947 | && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info)) |
5948 | return FALSE; | |
5949 | ||
9a2a56cc AM |
5950 | if (! _bfd_elf_maybe_strip_eh_frame_hdr (info)) |
5951 | return FALSE; | |
5952 | ||
5953 | if (dynobj != NULL && elf_hash_table (info)->dynamic_sections_created) | |
5a580b3a | 5954 | { |
554220db | 5955 | unsigned long section_sym_count; |
fd91d419 | 5956 | struct bfd_elf_version_tree *verdefs; |
5a580b3a | 5957 | asection *s; |
5a580b3a AM |
5958 | |
5959 | /* Set up the version definition section. */ | |
3d4d4302 | 5960 | s = bfd_get_linker_section (dynobj, ".gnu.version_d"); |
5a580b3a AM |
5961 | BFD_ASSERT (s != NULL); |
5962 | ||
5963 | /* We may have created additional version definitions if we are | |
5964 | just linking a regular application. */ | |
fd91d419 | 5965 | verdefs = info->version_info; |
5a580b3a AM |
5966 | |
5967 | /* Skip anonymous version tag. */ | |
5968 | if (verdefs != NULL && verdefs->vernum == 0) | |
5969 | verdefs = verdefs->next; | |
5970 | ||
3e3b46e5 | 5971 | if (verdefs == NULL && !info->create_default_symver) |
8423293d | 5972 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
5973 | else |
5974 | { | |
5975 | unsigned int cdefs; | |
5976 | bfd_size_type size; | |
5977 | struct bfd_elf_version_tree *t; | |
5978 | bfd_byte *p; | |
5979 | Elf_Internal_Verdef def; | |
5980 | Elf_Internal_Verdaux defaux; | |
3e3b46e5 PB |
5981 | struct bfd_link_hash_entry *bh; |
5982 | struct elf_link_hash_entry *h; | |
5983 | const char *name; | |
5a580b3a AM |
5984 | |
5985 | cdefs = 0; | |
5986 | size = 0; | |
5987 | ||
5988 | /* Make space for the base version. */ | |
5989 | size += sizeof (Elf_External_Verdef); | |
5990 | size += sizeof (Elf_External_Verdaux); | |
5991 | ++cdefs; | |
5992 | ||
3e3b46e5 PB |
5993 | /* Make space for the default version. */ |
5994 | if (info->create_default_symver) | |
5995 | { | |
5996 | size += sizeof (Elf_External_Verdef); | |
5997 | ++cdefs; | |
5998 | } | |
5999 | ||
5a580b3a AM |
6000 | for (t = verdefs; t != NULL; t = t->next) |
6001 | { | |
6002 | struct bfd_elf_version_deps *n; | |
6003 | ||
a6cc6b3b RO |
6004 | /* Don't emit base version twice. */ |
6005 | if (t->vernum == 0) | |
6006 | continue; | |
6007 | ||
5a580b3a AM |
6008 | size += sizeof (Elf_External_Verdef); |
6009 | size += sizeof (Elf_External_Verdaux); | |
6010 | ++cdefs; | |
6011 | ||
6012 | for (n = t->deps; n != NULL; n = n->next) | |
6013 | size += sizeof (Elf_External_Verdaux); | |
6014 | } | |
6015 | ||
eea6121a | 6016 | s->size = size; |
a50b1753 | 6017 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
eea6121a | 6018 | if (s->contents == NULL && s->size != 0) |
5a580b3a AM |
6019 | return FALSE; |
6020 | ||
6021 | /* Fill in the version definition section. */ | |
6022 | ||
6023 | p = s->contents; | |
6024 | ||
6025 | def.vd_version = VER_DEF_CURRENT; | |
6026 | def.vd_flags = VER_FLG_BASE; | |
6027 | def.vd_ndx = 1; | |
6028 | def.vd_cnt = 1; | |
3e3b46e5 PB |
6029 | if (info->create_default_symver) |
6030 | { | |
6031 | def.vd_aux = 2 * sizeof (Elf_External_Verdef); | |
6032 | def.vd_next = sizeof (Elf_External_Verdef); | |
6033 | } | |
6034 | else | |
6035 | { | |
6036 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6037 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6038 | + sizeof (Elf_External_Verdaux)); | |
6039 | } | |
5a580b3a AM |
6040 | |
6041 | if (soname_indx != (bfd_size_type) -1) | |
6042 | { | |
6043 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6044 | soname_indx); | |
6045 | def.vd_hash = bfd_elf_hash (soname); | |
6046 | defaux.vda_name = soname_indx; | |
3e3b46e5 | 6047 | name = soname; |
5a580b3a AM |
6048 | } |
6049 | else | |
6050 | { | |
5a580b3a AM |
6051 | bfd_size_type indx; |
6052 | ||
06084812 | 6053 | name = lbasename (output_bfd->filename); |
5a580b3a AM |
6054 | def.vd_hash = bfd_elf_hash (name); |
6055 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6056 | name, FALSE); | |
6057 | if (indx == (bfd_size_type) -1) | |
6058 | return FALSE; | |
6059 | defaux.vda_name = indx; | |
6060 | } | |
6061 | defaux.vda_next = 0; | |
6062 | ||
6063 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6064 | (Elf_External_Verdef *) p); | |
6065 | p += sizeof (Elf_External_Verdef); | |
3e3b46e5 PB |
6066 | if (info->create_default_symver) |
6067 | { | |
6068 | /* Add a symbol representing this version. */ | |
6069 | bh = NULL; | |
6070 | if (! (_bfd_generic_link_add_one_symbol | |
6071 | (info, dynobj, name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6072 | 0, NULL, FALSE, | |
6073 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6074 | return FALSE; | |
6075 | h = (struct elf_link_hash_entry *) bh; | |
6076 | h->non_elf = 0; | |
6077 | h->def_regular = 1; | |
6078 | h->type = STT_OBJECT; | |
6079 | h->verinfo.vertree = NULL; | |
6080 | ||
6081 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
6082 | return FALSE; | |
6083 | ||
6084 | /* Create a duplicate of the base version with the same | |
6085 | aux block, but different flags. */ | |
6086 | def.vd_flags = 0; | |
6087 | def.vd_ndx = 2; | |
6088 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6089 | if (verdefs) | |
6090 | def.vd_next = (sizeof (Elf_External_Verdef) | |
6091 | + sizeof (Elf_External_Verdaux)); | |
6092 | else | |
6093 | def.vd_next = 0; | |
6094 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6095 | (Elf_External_Verdef *) p); | |
6096 | p += sizeof (Elf_External_Verdef); | |
6097 | } | |
5a580b3a AM |
6098 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, |
6099 | (Elf_External_Verdaux *) p); | |
6100 | p += sizeof (Elf_External_Verdaux); | |
6101 | ||
6102 | for (t = verdefs; t != NULL; t = t->next) | |
6103 | { | |
6104 | unsigned int cdeps; | |
6105 | struct bfd_elf_version_deps *n; | |
5a580b3a | 6106 | |
a6cc6b3b RO |
6107 | /* Don't emit the base version twice. */ |
6108 | if (t->vernum == 0) | |
6109 | continue; | |
6110 | ||
5a580b3a AM |
6111 | cdeps = 0; |
6112 | for (n = t->deps; n != NULL; n = n->next) | |
6113 | ++cdeps; | |
6114 | ||
6115 | /* Add a symbol representing this version. */ | |
6116 | bh = NULL; | |
6117 | if (! (_bfd_generic_link_add_one_symbol | |
6118 | (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr, | |
6119 | 0, NULL, FALSE, | |
6120 | get_elf_backend_data (dynobj)->collect, &bh))) | |
6121 | return FALSE; | |
6122 | h = (struct elf_link_hash_entry *) bh; | |
f5385ebf AM |
6123 | h->non_elf = 0; |
6124 | h->def_regular = 1; | |
5a580b3a AM |
6125 | h->type = STT_OBJECT; |
6126 | h->verinfo.vertree = t; | |
6127 | ||
c152c796 | 6128 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5a580b3a AM |
6129 | return FALSE; |
6130 | ||
6131 | def.vd_version = VER_DEF_CURRENT; | |
6132 | def.vd_flags = 0; | |
6133 | if (t->globals.list == NULL | |
6134 | && t->locals.list == NULL | |
6135 | && ! t->used) | |
6136 | def.vd_flags |= VER_FLG_WEAK; | |
3e3b46e5 | 6137 | def.vd_ndx = t->vernum + (info->create_default_symver ? 2 : 1); |
5a580b3a AM |
6138 | def.vd_cnt = cdeps + 1; |
6139 | def.vd_hash = bfd_elf_hash (t->name); | |
6140 | def.vd_aux = sizeof (Elf_External_Verdef); | |
6141 | def.vd_next = 0; | |
a6cc6b3b RO |
6142 | |
6143 | /* If a basever node is next, it *must* be the last node in | |
6144 | the chain, otherwise Verdef construction breaks. */ | |
6145 | if (t->next != NULL && t->next->vernum == 0) | |
6146 | BFD_ASSERT (t->next->next == NULL); | |
6147 | ||
6148 | if (t->next != NULL && t->next->vernum != 0) | |
5a580b3a AM |
6149 | def.vd_next = (sizeof (Elf_External_Verdef) |
6150 | + (cdeps + 1) * sizeof (Elf_External_Verdaux)); | |
6151 | ||
6152 | _bfd_elf_swap_verdef_out (output_bfd, &def, | |
6153 | (Elf_External_Verdef *) p); | |
6154 | p += sizeof (Elf_External_Verdef); | |
6155 | ||
6156 | defaux.vda_name = h->dynstr_index; | |
6157 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6158 | h->dynstr_index); | |
6159 | defaux.vda_next = 0; | |
6160 | if (t->deps != NULL) | |
6161 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6162 | t->name_indx = defaux.vda_name; | |
6163 | ||
6164 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6165 | (Elf_External_Verdaux *) p); | |
6166 | p += sizeof (Elf_External_Verdaux); | |
6167 | ||
6168 | for (n = t->deps; n != NULL; n = n->next) | |
6169 | { | |
6170 | if (n->version_needed == NULL) | |
6171 | { | |
6172 | /* This can happen if there was an error in the | |
6173 | version script. */ | |
6174 | defaux.vda_name = 0; | |
6175 | } | |
6176 | else | |
6177 | { | |
6178 | defaux.vda_name = n->version_needed->name_indx; | |
6179 | _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, | |
6180 | defaux.vda_name); | |
6181 | } | |
6182 | if (n->next == NULL) | |
6183 | defaux.vda_next = 0; | |
6184 | else | |
6185 | defaux.vda_next = sizeof (Elf_External_Verdaux); | |
6186 | ||
6187 | _bfd_elf_swap_verdaux_out (output_bfd, &defaux, | |
6188 | (Elf_External_Verdaux *) p); | |
6189 | p += sizeof (Elf_External_Verdaux); | |
6190 | } | |
6191 | } | |
6192 | ||
6193 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERDEF, 0) | |
6194 | || !_bfd_elf_add_dynamic_entry (info, DT_VERDEFNUM, cdefs)) | |
6195 | return FALSE; | |
6196 | ||
6197 | elf_tdata (output_bfd)->cverdefs = cdefs; | |
6198 | } | |
6199 | ||
6200 | if ((info->new_dtags && info->flags) || (info->flags & DF_STATIC_TLS)) | |
6201 | { | |
6202 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS, info->flags)) | |
6203 | return FALSE; | |
6204 | } | |
6205 | else if (info->flags & DF_BIND_NOW) | |
6206 | { | |
6207 | if (!_bfd_elf_add_dynamic_entry (info, DT_BIND_NOW, 0)) | |
6208 | return FALSE; | |
6209 | } | |
6210 | ||
6211 | if (info->flags_1) | |
6212 | { | |
6213 | if (info->executable) | |
6214 | info->flags_1 &= ~ (DF_1_INITFIRST | |
6215 | | DF_1_NODELETE | |
6216 | | DF_1_NOOPEN); | |
6217 | if (!_bfd_elf_add_dynamic_entry (info, DT_FLAGS_1, info->flags_1)) | |
6218 | return FALSE; | |
6219 | } | |
6220 | ||
6221 | /* Work out the size of the version reference section. */ | |
6222 | ||
3d4d4302 | 6223 | s = bfd_get_linker_section (dynobj, ".gnu.version_r"); |
5a580b3a AM |
6224 | BFD_ASSERT (s != NULL); |
6225 | { | |
6226 | struct elf_find_verdep_info sinfo; | |
6227 | ||
5a580b3a AM |
6228 | sinfo.info = info; |
6229 | sinfo.vers = elf_tdata (output_bfd)->cverdefs; | |
6230 | if (sinfo.vers == 0) | |
6231 | sinfo.vers = 1; | |
6232 | sinfo.failed = FALSE; | |
6233 | ||
6234 | elf_link_hash_traverse (elf_hash_table (info), | |
6235 | _bfd_elf_link_find_version_dependencies, | |
6236 | &sinfo); | |
14b1c01e AM |
6237 | if (sinfo.failed) |
6238 | return FALSE; | |
5a580b3a AM |
6239 | |
6240 | if (elf_tdata (output_bfd)->verref == NULL) | |
8423293d | 6241 | s->flags |= SEC_EXCLUDE; |
5a580b3a AM |
6242 | else |
6243 | { | |
6244 | Elf_Internal_Verneed *t; | |
6245 | unsigned int size; | |
6246 | unsigned int crefs; | |
6247 | bfd_byte *p; | |
6248 | ||
a6cc6b3b | 6249 | /* Build the version dependency section. */ |
5a580b3a AM |
6250 | size = 0; |
6251 | crefs = 0; | |
6252 | for (t = elf_tdata (output_bfd)->verref; | |
6253 | t != NULL; | |
6254 | t = t->vn_nextref) | |
6255 | { | |
6256 | Elf_Internal_Vernaux *a; | |
6257 | ||
6258 | size += sizeof (Elf_External_Verneed); | |
6259 | ++crefs; | |
6260 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6261 | size += sizeof (Elf_External_Vernaux); | |
6262 | } | |
6263 | ||
eea6121a | 6264 | s->size = size; |
a50b1753 | 6265 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
5a580b3a AM |
6266 | if (s->contents == NULL) |
6267 | return FALSE; | |
6268 | ||
6269 | p = s->contents; | |
6270 | for (t = elf_tdata (output_bfd)->verref; | |
6271 | t != NULL; | |
6272 | t = t->vn_nextref) | |
6273 | { | |
6274 | unsigned int caux; | |
6275 | Elf_Internal_Vernaux *a; | |
6276 | bfd_size_type indx; | |
6277 | ||
6278 | caux = 0; | |
6279 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6280 | ++caux; | |
6281 | ||
6282 | t->vn_version = VER_NEED_CURRENT; | |
6283 | t->vn_cnt = caux; | |
6284 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6285 | elf_dt_name (t->vn_bfd) != NULL | |
6286 | ? elf_dt_name (t->vn_bfd) | |
06084812 | 6287 | : lbasename (t->vn_bfd->filename), |
5a580b3a AM |
6288 | FALSE); |
6289 | if (indx == (bfd_size_type) -1) | |
6290 | return FALSE; | |
6291 | t->vn_file = indx; | |
6292 | t->vn_aux = sizeof (Elf_External_Verneed); | |
6293 | if (t->vn_nextref == NULL) | |
6294 | t->vn_next = 0; | |
6295 | else | |
6296 | t->vn_next = (sizeof (Elf_External_Verneed) | |
6297 | + caux * sizeof (Elf_External_Vernaux)); | |
6298 | ||
6299 | _bfd_elf_swap_verneed_out (output_bfd, t, | |
6300 | (Elf_External_Verneed *) p); | |
6301 | p += sizeof (Elf_External_Verneed); | |
6302 | ||
6303 | for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr) | |
6304 | { | |
6305 | a->vna_hash = bfd_elf_hash (a->vna_nodename); | |
6306 | indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, | |
6307 | a->vna_nodename, FALSE); | |
6308 | if (indx == (bfd_size_type) -1) | |
6309 | return FALSE; | |
6310 | a->vna_name = indx; | |
6311 | if (a->vna_nextptr == NULL) | |
6312 | a->vna_next = 0; | |
6313 | else | |
6314 | a->vna_next = sizeof (Elf_External_Vernaux); | |
6315 | ||
6316 | _bfd_elf_swap_vernaux_out (output_bfd, a, | |
6317 | (Elf_External_Vernaux *) p); | |
6318 | p += sizeof (Elf_External_Vernaux); | |
6319 | } | |
6320 | } | |
6321 | ||
6322 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERNEED, 0) | |
6323 | || !_bfd_elf_add_dynamic_entry (info, DT_VERNEEDNUM, crefs)) | |
6324 | return FALSE; | |
6325 | ||
6326 | elf_tdata (output_bfd)->cverrefs = crefs; | |
6327 | } | |
6328 | } | |
6329 | ||
8423293d AM |
6330 | if ((elf_tdata (output_bfd)->cverrefs == 0 |
6331 | && elf_tdata (output_bfd)->cverdefs == 0) | |
6332 | || _bfd_elf_link_renumber_dynsyms (output_bfd, info, | |
6333 | §ion_sym_count) == 0) | |
6334 | { | |
3d4d4302 | 6335 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
8423293d AM |
6336 | s->flags |= SEC_EXCLUDE; |
6337 | } | |
6338 | } | |
6339 | return TRUE; | |
6340 | } | |
6341 | ||
74541ad4 AM |
6342 | /* Find the first non-excluded output section. We'll use its |
6343 | section symbol for some emitted relocs. */ | |
6344 | void | |
6345 | _bfd_elf_init_1_index_section (bfd *output_bfd, struct bfd_link_info *info) | |
6346 | { | |
6347 | asection *s; | |
6348 | ||
6349 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
6350 | if ((s->flags & (SEC_EXCLUDE | SEC_ALLOC)) == SEC_ALLOC | |
6351 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) | |
6352 | { | |
6353 | elf_hash_table (info)->text_index_section = s; | |
6354 | break; | |
6355 | } | |
6356 | } | |
6357 | ||
6358 | /* Find two non-excluded output sections, one for code, one for data. | |
6359 | We'll use their section symbols for some emitted relocs. */ | |
6360 | void | |
6361 | _bfd_elf_init_2_index_sections (bfd *output_bfd, struct bfd_link_info *info) | |
6362 | { | |
6363 | asection *s; | |
6364 | ||
266b05cf DJ |
6365 | /* Data first, since setting text_index_section changes |
6366 | _bfd_elf_link_omit_section_dynsym. */ | |
74541ad4 | 6367 | for (s = output_bfd->sections; s != NULL; s = s->next) |
266b05cf | 6368 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
74541ad4 AM |
6369 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6370 | { | |
266b05cf | 6371 | elf_hash_table (info)->data_index_section = s; |
74541ad4 AM |
6372 | break; |
6373 | } | |
6374 | ||
6375 | for (s = output_bfd->sections; s != NULL; s = s->next) | |
266b05cf DJ |
6376 | if (((s->flags & (SEC_EXCLUDE | SEC_ALLOC | SEC_READONLY)) |
6377 | == (SEC_ALLOC | SEC_READONLY)) | |
74541ad4 AM |
6378 | && !_bfd_elf_link_omit_section_dynsym (output_bfd, info, s)) |
6379 | { | |
266b05cf | 6380 | elf_hash_table (info)->text_index_section = s; |
74541ad4 AM |
6381 | break; |
6382 | } | |
6383 | ||
6384 | if (elf_hash_table (info)->text_index_section == NULL) | |
6385 | elf_hash_table (info)->text_index_section | |
6386 | = elf_hash_table (info)->data_index_section; | |
6387 | } | |
6388 | ||
8423293d AM |
6389 | bfd_boolean |
6390 | bfd_elf_size_dynsym_hash_dynstr (bfd *output_bfd, struct bfd_link_info *info) | |
6391 | { | |
74541ad4 AM |
6392 | const struct elf_backend_data *bed; |
6393 | ||
8423293d AM |
6394 | if (!is_elf_hash_table (info->hash)) |
6395 | return TRUE; | |
6396 | ||
74541ad4 AM |
6397 | bed = get_elf_backend_data (output_bfd); |
6398 | (*bed->elf_backend_init_index_section) (output_bfd, info); | |
6399 | ||
8423293d AM |
6400 | if (elf_hash_table (info)->dynamic_sections_created) |
6401 | { | |
6402 | bfd *dynobj; | |
8423293d AM |
6403 | asection *s; |
6404 | bfd_size_type dynsymcount; | |
6405 | unsigned long section_sym_count; | |
8423293d AM |
6406 | unsigned int dtagcount; |
6407 | ||
6408 | dynobj = elf_hash_table (info)->dynobj; | |
6409 | ||
5a580b3a AM |
6410 | /* Assign dynsym indicies. In a shared library we generate a |
6411 | section symbol for each output section, which come first. | |
6412 | Next come all of the back-end allocated local dynamic syms, | |
6413 | followed by the rest of the global symbols. */ | |
6414 | ||
554220db AM |
6415 | dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info, |
6416 | §ion_sym_count); | |
5a580b3a AM |
6417 | |
6418 | /* Work out the size of the symbol version section. */ | |
3d4d4302 | 6419 | s = bfd_get_linker_section (dynobj, ".gnu.version"); |
5a580b3a | 6420 | BFD_ASSERT (s != NULL); |
8423293d AM |
6421 | if (dynsymcount != 0 |
6422 | && (s->flags & SEC_EXCLUDE) == 0) | |
5a580b3a | 6423 | { |
eea6121a | 6424 | s->size = dynsymcount * sizeof (Elf_External_Versym); |
a50b1753 | 6425 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
5a580b3a AM |
6426 | if (s->contents == NULL) |
6427 | return FALSE; | |
6428 | ||
6429 | if (!_bfd_elf_add_dynamic_entry (info, DT_VERSYM, 0)) | |
6430 | return FALSE; | |
6431 | } | |
6432 | ||
6433 | /* Set the size of the .dynsym and .hash sections. We counted | |
6434 | the number of dynamic symbols in elf_link_add_object_symbols. | |
6435 | We will build the contents of .dynsym and .hash when we build | |
6436 | the final symbol table, because until then we do not know the | |
6437 | correct value to give the symbols. We built the .dynstr | |
6438 | section as we went along in elf_link_add_object_symbols. */ | |
3d4d4302 | 6439 | s = bfd_get_linker_section (dynobj, ".dynsym"); |
5a580b3a | 6440 | BFD_ASSERT (s != NULL); |
eea6121a | 6441 | s->size = dynsymcount * bed->s->sizeof_sym; |
5a580b3a AM |
6442 | |
6443 | if (dynsymcount != 0) | |
6444 | { | |
a50b1753 | 6445 | s->contents = (unsigned char *) bfd_alloc (output_bfd, s->size); |
554220db AM |
6446 | if (s->contents == NULL) |
6447 | return FALSE; | |
5a580b3a | 6448 | |
554220db AM |
6449 | /* The first entry in .dynsym is a dummy symbol. |
6450 | Clear all the section syms, in case we don't output them all. */ | |
6451 | ++section_sym_count; | |
6452 | memset (s->contents, 0, section_sym_count * bed->s->sizeof_sym); | |
5a580b3a AM |
6453 | } |
6454 | ||
fdc90cb4 JJ |
6455 | elf_hash_table (info)->bucketcount = 0; |
6456 | ||
5a580b3a AM |
6457 | /* Compute the size of the hashing table. As a side effect this |
6458 | computes the hash values for all the names we export. */ | |
fdc90cb4 JJ |
6459 | if (info->emit_hash) |
6460 | { | |
6461 | unsigned long int *hashcodes; | |
14b1c01e | 6462 | struct hash_codes_info hashinf; |
fdc90cb4 JJ |
6463 | bfd_size_type amt; |
6464 | unsigned long int nsyms; | |
6465 | size_t bucketcount; | |
6466 | size_t hash_entry_size; | |
6467 | ||
6468 | /* Compute the hash values for all exported symbols. At the same | |
6469 | time store the values in an array so that we could use them for | |
6470 | optimizations. */ | |
6471 | amt = dynsymcount * sizeof (unsigned long int); | |
a50b1753 | 6472 | hashcodes = (unsigned long int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6473 | if (hashcodes == NULL) |
6474 | return FALSE; | |
14b1c01e AM |
6475 | hashinf.hashcodes = hashcodes; |
6476 | hashinf.error = FALSE; | |
5a580b3a | 6477 | |
fdc90cb4 JJ |
6478 | /* Put all hash values in HASHCODES. */ |
6479 | elf_link_hash_traverse (elf_hash_table (info), | |
14b1c01e AM |
6480 | elf_collect_hash_codes, &hashinf); |
6481 | if (hashinf.error) | |
4dd07732 AM |
6482 | { |
6483 | free (hashcodes); | |
6484 | return FALSE; | |
6485 | } | |
5a580b3a | 6486 | |
14b1c01e | 6487 | nsyms = hashinf.hashcodes - hashcodes; |
fdc90cb4 JJ |
6488 | bucketcount |
6489 | = compute_bucket_count (info, hashcodes, nsyms, 0); | |
6490 | free (hashcodes); | |
6491 | ||
6492 | if (bucketcount == 0) | |
6493 | return FALSE; | |
5a580b3a | 6494 | |
fdc90cb4 JJ |
6495 | elf_hash_table (info)->bucketcount = bucketcount; |
6496 | ||
3d4d4302 | 6497 | s = bfd_get_linker_section (dynobj, ".hash"); |
fdc90cb4 JJ |
6498 | BFD_ASSERT (s != NULL); |
6499 | hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize; | |
6500 | s->size = ((2 + bucketcount + dynsymcount) * hash_entry_size); | |
a50b1753 | 6501 | s->contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6502 | if (s->contents == NULL) |
6503 | return FALSE; | |
6504 | ||
6505 | bfd_put (8 * hash_entry_size, output_bfd, bucketcount, s->contents); | |
6506 | bfd_put (8 * hash_entry_size, output_bfd, dynsymcount, | |
6507 | s->contents + hash_entry_size); | |
6508 | } | |
6509 | ||
6510 | if (info->emit_gnu_hash) | |
6511 | { | |
6512 | size_t i, cnt; | |
6513 | unsigned char *contents; | |
6514 | struct collect_gnu_hash_codes cinfo; | |
6515 | bfd_size_type amt; | |
6516 | size_t bucketcount; | |
6517 | ||
6518 | memset (&cinfo, 0, sizeof (cinfo)); | |
6519 | ||
6520 | /* Compute the hash values for all exported symbols. At the same | |
6521 | time store the values in an array so that we could use them for | |
6522 | optimizations. */ | |
6523 | amt = dynsymcount * 2 * sizeof (unsigned long int); | |
a50b1753 | 6524 | cinfo.hashcodes = (long unsigned int *) bfd_malloc (amt); |
fdc90cb4 JJ |
6525 | if (cinfo.hashcodes == NULL) |
6526 | return FALSE; | |
6527 | ||
6528 | cinfo.hashval = cinfo.hashcodes + dynsymcount; | |
6529 | cinfo.min_dynindx = -1; | |
6530 | cinfo.output_bfd = output_bfd; | |
6531 | cinfo.bed = bed; | |
6532 | ||
6533 | /* Put all hash values in HASHCODES. */ | |
6534 | elf_link_hash_traverse (elf_hash_table (info), | |
6535 | elf_collect_gnu_hash_codes, &cinfo); | |
14b1c01e | 6536 | if (cinfo.error) |
4dd07732 AM |
6537 | { |
6538 | free (cinfo.hashcodes); | |
6539 | return FALSE; | |
6540 | } | |
fdc90cb4 JJ |
6541 | |
6542 | bucketcount | |
6543 | = compute_bucket_count (info, cinfo.hashcodes, cinfo.nsyms, 1); | |
6544 | ||
6545 | if (bucketcount == 0) | |
6546 | { | |
6547 | free (cinfo.hashcodes); | |
6548 | return FALSE; | |
6549 | } | |
6550 | ||
3d4d4302 | 6551 | s = bfd_get_linker_section (dynobj, ".gnu.hash"); |
fdc90cb4 JJ |
6552 | BFD_ASSERT (s != NULL); |
6553 | ||
6554 | if (cinfo.nsyms == 0) | |
6555 | { | |
6556 | /* Empty .gnu.hash section is special. */ | |
6557 | BFD_ASSERT (cinfo.min_dynindx == -1); | |
6558 | free (cinfo.hashcodes); | |
6559 | s->size = 5 * 4 + bed->s->arch_size / 8; | |
a50b1753 | 6560 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6561 | if (contents == NULL) |
6562 | return FALSE; | |
6563 | s->contents = contents; | |
6564 | /* 1 empty bucket. */ | |
6565 | bfd_put_32 (output_bfd, 1, contents); | |
6566 | /* SYMIDX above the special symbol 0. */ | |
6567 | bfd_put_32 (output_bfd, 1, contents + 4); | |
6568 | /* Just one word for bitmask. */ | |
6569 | bfd_put_32 (output_bfd, 1, contents + 8); | |
6570 | /* Only hash fn bloom filter. */ | |
6571 | bfd_put_32 (output_bfd, 0, contents + 12); | |
6572 | /* No hashes are valid - empty bitmask. */ | |
6573 | bfd_put (bed->s->arch_size, output_bfd, 0, contents + 16); | |
6574 | /* No hashes in the only bucket. */ | |
6575 | bfd_put_32 (output_bfd, 0, | |
6576 | contents + 16 + bed->s->arch_size / 8); | |
6577 | } | |
6578 | else | |
6579 | { | |
9e6619e2 | 6580 | unsigned long int maskwords, maskbitslog2, x; |
0b33793d | 6581 | BFD_ASSERT (cinfo.min_dynindx != -1); |
fdc90cb4 | 6582 | |
9e6619e2 AM |
6583 | x = cinfo.nsyms; |
6584 | maskbitslog2 = 1; | |
6585 | while ((x >>= 1) != 0) | |
6586 | ++maskbitslog2; | |
fdc90cb4 JJ |
6587 | if (maskbitslog2 < 3) |
6588 | maskbitslog2 = 5; | |
6589 | else if ((1 << (maskbitslog2 - 2)) & cinfo.nsyms) | |
6590 | maskbitslog2 = maskbitslog2 + 3; | |
6591 | else | |
6592 | maskbitslog2 = maskbitslog2 + 2; | |
6593 | if (bed->s->arch_size == 64) | |
6594 | { | |
6595 | if (maskbitslog2 == 5) | |
6596 | maskbitslog2 = 6; | |
6597 | cinfo.shift1 = 6; | |
6598 | } | |
6599 | else | |
6600 | cinfo.shift1 = 5; | |
6601 | cinfo.mask = (1 << cinfo.shift1) - 1; | |
2ccdbfcc | 6602 | cinfo.shift2 = maskbitslog2; |
fdc90cb4 JJ |
6603 | cinfo.maskbits = 1 << maskbitslog2; |
6604 | maskwords = 1 << (maskbitslog2 - cinfo.shift1); | |
6605 | amt = bucketcount * sizeof (unsigned long int) * 2; | |
6606 | amt += maskwords * sizeof (bfd_vma); | |
a50b1753 | 6607 | cinfo.bitmask = (bfd_vma *) bfd_malloc (amt); |
fdc90cb4 JJ |
6608 | if (cinfo.bitmask == NULL) |
6609 | { | |
6610 | free (cinfo.hashcodes); | |
6611 | return FALSE; | |
6612 | } | |
6613 | ||
a50b1753 | 6614 | cinfo.counts = (long unsigned int *) (cinfo.bitmask + maskwords); |
fdc90cb4 JJ |
6615 | cinfo.indx = cinfo.counts + bucketcount; |
6616 | cinfo.symindx = dynsymcount - cinfo.nsyms; | |
6617 | memset (cinfo.bitmask, 0, maskwords * sizeof (bfd_vma)); | |
6618 | ||
6619 | /* Determine how often each hash bucket is used. */ | |
6620 | memset (cinfo.counts, 0, bucketcount * sizeof (cinfo.counts[0])); | |
6621 | for (i = 0; i < cinfo.nsyms; ++i) | |
6622 | ++cinfo.counts[cinfo.hashcodes[i] % bucketcount]; | |
6623 | ||
6624 | for (i = 0, cnt = cinfo.symindx; i < bucketcount; ++i) | |
6625 | if (cinfo.counts[i] != 0) | |
6626 | { | |
6627 | cinfo.indx[i] = cnt; | |
6628 | cnt += cinfo.counts[i]; | |
6629 | } | |
6630 | BFD_ASSERT (cnt == dynsymcount); | |
6631 | cinfo.bucketcount = bucketcount; | |
6632 | cinfo.local_indx = cinfo.min_dynindx; | |
6633 | ||
6634 | s->size = (4 + bucketcount + cinfo.nsyms) * 4; | |
6635 | s->size += cinfo.maskbits / 8; | |
a50b1753 | 6636 | contents = (unsigned char *) bfd_zalloc (output_bfd, s->size); |
fdc90cb4 JJ |
6637 | if (contents == NULL) |
6638 | { | |
6639 | free (cinfo.bitmask); | |
6640 | free (cinfo.hashcodes); | |
6641 | return FALSE; | |
6642 | } | |
6643 | ||
6644 | s->contents = contents; | |
6645 | bfd_put_32 (output_bfd, bucketcount, contents); | |
6646 | bfd_put_32 (output_bfd, cinfo.symindx, contents + 4); | |
6647 | bfd_put_32 (output_bfd, maskwords, contents + 8); | |
6648 | bfd_put_32 (output_bfd, cinfo.shift2, contents + 12); | |
6649 | contents += 16 + cinfo.maskbits / 8; | |
6650 | ||
6651 | for (i = 0; i < bucketcount; ++i) | |
6652 | { | |
6653 | if (cinfo.counts[i] == 0) | |
6654 | bfd_put_32 (output_bfd, 0, contents); | |
6655 | else | |
6656 | bfd_put_32 (output_bfd, cinfo.indx[i], contents); | |
6657 | contents += 4; | |
6658 | } | |
6659 | ||
6660 | cinfo.contents = contents; | |
6661 | ||
6662 | /* Renumber dynamic symbols, populate .gnu.hash section. */ | |
6663 | elf_link_hash_traverse (elf_hash_table (info), | |
6664 | elf_renumber_gnu_hash_syms, &cinfo); | |
6665 | ||
6666 | contents = s->contents + 16; | |
6667 | for (i = 0; i < maskwords; ++i) | |
6668 | { | |
6669 | bfd_put (bed->s->arch_size, output_bfd, cinfo.bitmask[i], | |
6670 | contents); | |
6671 | contents += bed->s->arch_size / 8; | |
6672 | } | |
6673 | ||
6674 | free (cinfo.bitmask); | |
6675 | free (cinfo.hashcodes); | |
6676 | } | |
6677 | } | |
5a580b3a | 6678 | |
3d4d4302 | 6679 | s = bfd_get_linker_section (dynobj, ".dynstr"); |
5a580b3a AM |
6680 | BFD_ASSERT (s != NULL); |
6681 | ||
4ad4eba5 | 6682 | elf_finalize_dynstr (output_bfd, info); |
5a580b3a | 6683 | |
eea6121a | 6684 | s->size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr); |
5a580b3a AM |
6685 | |
6686 | for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount) | |
6687 | if (!_bfd_elf_add_dynamic_entry (info, DT_NULL, 0)) | |
6688 | return FALSE; | |
6689 | } | |
6690 | ||
6691 | return TRUE; | |
6692 | } | |
4d269e42 | 6693 | \f |
4d269e42 AM |
6694 | /* Make sure sec_info_type is cleared if sec_info is cleared too. */ |
6695 | ||
6696 | static void | |
6697 | merge_sections_remove_hook (bfd *abfd ATTRIBUTE_UNUSED, | |
6698 | asection *sec) | |
6699 | { | |
dbaa2011 AM |
6700 | BFD_ASSERT (sec->sec_info_type == SEC_INFO_TYPE_MERGE); |
6701 | sec->sec_info_type = SEC_INFO_TYPE_NONE; | |
4d269e42 AM |
6702 | } |
6703 | ||
6704 | /* Finish SHF_MERGE section merging. */ | |
6705 | ||
6706 | bfd_boolean | |
6707 | _bfd_elf_merge_sections (bfd *abfd, struct bfd_link_info *info) | |
6708 | { | |
6709 | bfd *ibfd; | |
6710 | asection *sec; | |
6711 | ||
6712 | if (!is_elf_hash_table (info->hash)) | |
6713 | return FALSE; | |
6714 | ||
6715 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
6716 | if ((ibfd->flags & DYNAMIC) == 0) | |
6717 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
6718 | if ((sec->flags & SEC_MERGE) != 0 | |
6719 | && !bfd_is_abs_section (sec->output_section)) | |
6720 | { | |
6721 | struct bfd_elf_section_data *secdata; | |
6722 | ||
6723 | secdata = elf_section_data (sec); | |
6724 | if (! _bfd_add_merge_section (abfd, | |
6725 | &elf_hash_table (info)->merge_info, | |
6726 | sec, &secdata->sec_info)) | |
6727 | return FALSE; | |
6728 | else if (secdata->sec_info) | |
dbaa2011 | 6729 | sec->sec_info_type = SEC_INFO_TYPE_MERGE; |
4d269e42 AM |
6730 | } |
6731 | ||
6732 | if (elf_hash_table (info)->merge_info != NULL) | |
6733 | _bfd_merge_sections (abfd, info, elf_hash_table (info)->merge_info, | |
6734 | merge_sections_remove_hook); | |
6735 | return TRUE; | |
6736 | } | |
6737 | ||
6738 | /* Create an entry in an ELF linker hash table. */ | |
6739 | ||
6740 | struct bfd_hash_entry * | |
6741 | _bfd_elf_link_hash_newfunc (struct bfd_hash_entry *entry, | |
6742 | struct bfd_hash_table *table, | |
6743 | const char *string) | |
6744 | { | |
6745 | /* Allocate the structure if it has not already been allocated by a | |
6746 | subclass. */ | |
6747 | if (entry == NULL) | |
6748 | { | |
a50b1753 NC |
6749 | entry = (struct bfd_hash_entry *) |
6750 | bfd_hash_allocate (table, sizeof (struct elf_link_hash_entry)); | |
4d269e42 AM |
6751 | if (entry == NULL) |
6752 | return entry; | |
6753 | } | |
6754 | ||
6755 | /* Call the allocation method of the superclass. */ | |
6756 | entry = _bfd_link_hash_newfunc (entry, table, string); | |
6757 | if (entry != NULL) | |
6758 | { | |
6759 | struct elf_link_hash_entry *ret = (struct elf_link_hash_entry *) entry; | |
6760 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) table; | |
6761 | ||
6762 | /* Set local fields. */ | |
6763 | ret->indx = -1; | |
6764 | ret->dynindx = -1; | |
6765 | ret->got = htab->init_got_refcount; | |
6766 | ret->plt = htab->init_plt_refcount; | |
6767 | memset (&ret->size, 0, (sizeof (struct elf_link_hash_entry) | |
6768 | - offsetof (struct elf_link_hash_entry, size))); | |
6769 | /* Assume that we have been called by a non-ELF symbol reader. | |
6770 | This flag is then reset by the code which reads an ELF input | |
6771 | file. This ensures that a symbol created by a non-ELF symbol | |
6772 | reader will have the flag set correctly. */ | |
6773 | ret->non_elf = 1; | |
6774 | } | |
6775 | ||
6776 | return entry; | |
6777 | } | |
6778 | ||
6779 | /* Copy data from an indirect symbol to its direct symbol, hiding the | |
6780 | old indirect symbol. Also used for copying flags to a weakdef. */ | |
6781 | ||
6782 | void | |
6783 | _bfd_elf_link_hash_copy_indirect (struct bfd_link_info *info, | |
6784 | struct elf_link_hash_entry *dir, | |
6785 | struct elf_link_hash_entry *ind) | |
6786 | { | |
6787 | struct elf_link_hash_table *htab; | |
6788 | ||
6789 | /* Copy down any references that we may have already seen to the | |
6790 | symbol which just became indirect. */ | |
6791 | ||
6792 | dir->ref_dynamic |= ind->ref_dynamic; | |
6793 | dir->ref_regular |= ind->ref_regular; | |
6794 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
6795 | dir->non_got_ref |= ind->non_got_ref; | |
6796 | dir->needs_plt |= ind->needs_plt; | |
6797 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
6798 | ||
6799 | if (ind->root.type != bfd_link_hash_indirect) | |
6800 | return; | |
6801 | ||
6802 | /* Copy over the global and procedure linkage table refcount entries. | |
6803 | These may have been already set up by a check_relocs routine. */ | |
6804 | htab = elf_hash_table (info); | |
6805 | if (ind->got.refcount > htab->init_got_refcount.refcount) | |
6806 | { | |
6807 | if (dir->got.refcount < 0) | |
6808 | dir->got.refcount = 0; | |
6809 | dir->got.refcount += ind->got.refcount; | |
6810 | ind->got.refcount = htab->init_got_refcount.refcount; | |
6811 | } | |
6812 | ||
6813 | if (ind->plt.refcount > htab->init_plt_refcount.refcount) | |
6814 | { | |
6815 | if (dir->plt.refcount < 0) | |
6816 | dir->plt.refcount = 0; | |
6817 | dir->plt.refcount += ind->plt.refcount; | |
6818 | ind->plt.refcount = htab->init_plt_refcount.refcount; | |
6819 | } | |
6820 | ||
6821 | if (ind->dynindx != -1) | |
6822 | { | |
6823 | if (dir->dynindx != -1) | |
6824 | _bfd_elf_strtab_delref (htab->dynstr, dir->dynstr_index); | |
6825 | dir->dynindx = ind->dynindx; | |
6826 | dir->dynstr_index = ind->dynstr_index; | |
6827 | ind->dynindx = -1; | |
6828 | ind->dynstr_index = 0; | |
6829 | } | |
6830 | } | |
6831 | ||
6832 | void | |
6833 | _bfd_elf_link_hash_hide_symbol (struct bfd_link_info *info, | |
6834 | struct elf_link_hash_entry *h, | |
6835 | bfd_boolean force_local) | |
6836 | { | |
3aa14d16 L |
6837 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
6838 | if (h->type != STT_GNU_IFUNC) | |
6839 | { | |
6840 | h->plt = elf_hash_table (info)->init_plt_offset; | |
6841 | h->needs_plt = 0; | |
6842 | } | |
4d269e42 AM |
6843 | if (force_local) |
6844 | { | |
6845 | h->forced_local = 1; | |
6846 | if (h->dynindx != -1) | |
6847 | { | |
6848 | h->dynindx = -1; | |
6849 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
6850 | h->dynstr_index); | |
6851 | } | |
6852 | } | |
6853 | } | |
6854 | ||
7bf52ea2 AM |
6855 | /* Initialize an ELF linker hash table. *TABLE has been zeroed by our |
6856 | caller. */ | |
4d269e42 AM |
6857 | |
6858 | bfd_boolean | |
6859 | _bfd_elf_link_hash_table_init | |
6860 | (struct elf_link_hash_table *table, | |
6861 | bfd *abfd, | |
6862 | struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *, | |
6863 | struct bfd_hash_table *, | |
6864 | const char *), | |
4dfe6ac6 NC |
6865 | unsigned int entsize, |
6866 | enum elf_target_id target_id) | |
4d269e42 AM |
6867 | { |
6868 | bfd_boolean ret; | |
6869 | int can_refcount = get_elf_backend_data (abfd)->can_refcount; | |
6870 | ||
4d269e42 AM |
6871 | table->init_got_refcount.refcount = can_refcount - 1; |
6872 | table->init_plt_refcount.refcount = can_refcount - 1; | |
6873 | table->init_got_offset.offset = -(bfd_vma) 1; | |
6874 | table->init_plt_offset.offset = -(bfd_vma) 1; | |
6875 | /* The first dynamic symbol is a dummy. */ | |
6876 | table->dynsymcount = 1; | |
6877 | ||
6878 | ret = _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize); | |
4dfe6ac6 | 6879 | |
4d269e42 | 6880 | table->root.type = bfd_link_elf_hash_table; |
4dfe6ac6 | 6881 | table->hash_table_id = target_id; |
4d269e42 AM |
6882 | |
6883 | return ret; | |
6884 | } | |
6885 | ||
6886 | /* Create an ELF linker hash table. */ | |
6887 | ||
6888 | struct bfd_link_hash_table * | |
6889 | _bfd_elf_link_hash_table_create (bfd *abfd) | |
6890 | { | |
6891 | struct elf_link_hash_table *ret; | |
6892 | bfd_size_type amt = sizeof (struct elf_link_hash_table); | |
6893 | ||
7bf52ea2 | 6894 | ret = (struct elf_link_hash_table *) bfd_zmalloc (amt); |
4d269e42 AM |
6895 | if (ret == NULL) |
6896 | return NULL; | |
6897 | ||
6898 | if (! _bfd_elf_link_hash_table_init (ret, abfd, _bfd_elf_link_hash_newfunc, | |
4dfe6ac6 NC |
6899 | sizeof (struct elf_link_hash_entry), |
6900 | GENERIC_ELF_DATA)) | |
4d269e42 AM |
6901 | { |
6902 | free (ret); | |
6903 | return NULL; | |
6904 | } | |
6905 | ||
6906 | return &ret->root; | |
6907 | } | |
6908 | ||
9f7c3e5e AM |
6909 | /* Destroy an ELF linker hash table. */ |
6910 | ||
6911 | void | |
6912 | _bfd_elf_link_hash_table_free (struct bfd_link_hash_table *hash) | |
6913 | { | |
6914 | struct elf_link_hash_table *htab = (struct elf_link_hash_table *) hash; | |
6915 | if (htab->dynstr != NULL) | |
6916 | _bfd_elf_strtab_free (htab->dynstr); | |
6917 | _bfd_merge_sections_free (htab->merge_info); | |
6918 | _bfd_generic_link_hash_table_free (hash); | |
6919 | } | |
6920 | ||
4d269e42 AM |
6921 | /* This is a hook for the ELF emulation code in the generic linker to |
6922 | tell the backend linker what file name to use for the DT_NEEDED | |
6923 | entry for a dynamic object. */ | |
6924 | ||
6925 | void | |
6926 | bfd_elf_set_dt_needed_name (bfd *abfd, const char *name) | |
6927 | { | |
6928 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6929 | && bfd_get_format (abfd) == bfd_object) | |
6930 | elf_dt_name (abfd) = name; | |
6931 | } | |
6932 | ||
6933 | int | |
6934 | bfd_elf_get_dyn_lib_class (bfd *abfd) | |
6935 | { | |
6936 | int lib_class; | |
6937 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6938 | && bfd_get_format (abfd) == bfd_object) | |
6939 | lib_class = elf_dyn_lib_class (abfd); | |
6940 | else | |
6941 | lib_class = 0; | |
6942 | return lib_class; | |
6943 | } | |
6944 | ||
6945 | void | |
6946 | bfd_elf_set_dyn_lib_class (bfd *abfd, enum dynamic_lib_link_class lib_class) | |
6947 | { | |
6948 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6949 | && bfd_get_format (abfd) == bfd_object) | |
6950 | elf_dyn_lib_class (abfd) = lib_class; | |
6951 | } | |
6952 | ||
6953 | /* Get the list of DT_NEEDED entries for a link. This is a hook for | |
6954 | the linker ELF emulation code. */ | |
6955 | ||
6956 | struct bfd_link_needed_list * | |
6957 | bfd_elf_get_needed_list (bfd *abfd ATTRIBUTE_UNUSED, | |
6958 | struct bfd_link_info *info) | |
6959 | { | |
6960 | if (! is_elf_hash_table (info->hash)) | |
6961 | return NULL; | |
6962 | return elf_hash_table (info)->needed; | |
6963 | } | |
6964 | ||
6965 | /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a | |
6966 | hook for the linker ELF emulation code. */ | |
6967 | ||
6968 | struct bfd_link_needed_list * | |
6969 | bfd_elf_get_runpath_list (bfd *abfd ATTRIBUTE_UNUSED, | |
6970 | struct bfd_link_info *info) | |
6971 | { | |
6972 | if (! is_elf_hash_table (info->hash)) | |
6973 | return NULL; | |
6974 | return elf_hash_table (info)->runpath; | |
6975 | } | |
6976 | ||
6977 | /* Get the name actually used for a dynamic object for a link. This | |
6978 | is the SONAME entry if there is one. Otherwise, it is the string | |
6979 | passed to bfd_elf_set_dt_needed_name, or it is the filename. */ | |
6980 | ||
6981 | const char * | |
6982 | bfd_elf_get_dt_soname (bfd *abfd) | |
6983 | { | |
6984 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour | |
6985 | && bfd_get_format (abfd) == bfd_object) | |
6986 | return elf_dt_name (abfd); | |
6987 | return NULL; | |
6988 | } | |
6989 | ||
6990 | /* Get the list of DT_NEEDED entries from a BFD. This is a hook for | |
6991 | the ELF linker emulation code. */ | |
6992 | ||
6993 | bfd_boolean | |
6994 | bfd_elf_get_bfd_needed_list (bfd *abfd, | |
6995 | struct bfd_link_needed_list **pneeded) | |
6996 | { | |
6997 | asection *s; | |
6998 | bfd_byte *dynbuf = NULL; | |
cb33740c | 6999 | unsigned int elfsec; |
4d269e42 AM |
7000 | unsigned long shlink; |
7001 | bfd_byte *extdyn, *extdynend; | |
7002 | size_t extdynsize; | |
7003 | void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *); | |
7004 | ||
7005 | *pneeded = NULL; | |
7006 | ||
7007 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour | |
7008 | || bfd_get_format (abfd) != bfd_object) | |
7009 | return TRUE; | |
7010 | ||
7011 | s = bfd_get_section_by_name (abfd, ".dynamic"); | |
7012 | if (s == NULL || s->size == 0) | |
7013 | return TRUE; | |
7014 | ||
7015 | if (!bfd_malloc_and_get_section (abfd, s, &dynbuf)) | |
7016 | goto error_return; | |
7017 | ||
7018 | elfsec = _bfd_elf_section_from_bfd_section (abfd, s); | |
cb33740c | 7019 | if (elfsec == SHN_BAD) |
4d269e42 AM |
7020 | goto error_return; |
7021 | ||
7022 | shlink = elf_elfsections (abfd)[elfsec]->sh_link; | |
c152c796 | 7023 | |
4d269e42 AM |
7024 | extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn; |
7025 | swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in; | |
7026 | ||
7027 | extdyn = dynbuf; | |
7028 | extdynend = extdyn + s->size; | |
7029 | for (; extdyn < extdynend; extdyn += extdynsize) | |
7030 | { | |
7031 | Elf_Internal_Dyn dyn; | |
7032 | ||
7033 | (*swap_dyn_in) (abfd, extdyn, &dyn); | |
7034 | ||
7035 | if (dyn.d_tag == DT_NULL) | |
7036 | break; | |
7037 | ||
7038 | if (dyn.d_tag == DT_NEEDED) | |
7039 | { | |
7040 | const char *string; | |
7041 | struct bfd_link_needed_list *l; | |
7042 | unsigned int tagv = dyn.d_un.d_val; | |
7043 | bfd_size_type amt; | |
7044 | ||
7045 | string = bfd_elf_string_from_elf_section (abfd, shlink, tagv); | |
7046 | if (string == NULL) | |
7047 | goto error_return; | |
7048 | ||
7049 | amt = sizeof *l; | |
a50b1753 | 7050 | l = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt); |
4d269e42 AM |
7051 | if (l == NULL) |
7052 | goto error_return; | |
7053 | ||
7054 | l->by = abfd; | |
7055 | l->name = string; | |
7056 | l->next = *pneeded; | |
7057 | *pneeded = l; | |
7058 | } | |
7059 | } | |
7060 | ||
7061 | free (dynbuf); | |
7062 | ||
7063 | return TRUE; | |
7064 | ||
7065 | error_return: | |
7066 | if (dynbuf != NULL) | |
7067 | free (dynbuf); | |
7068 | return FALSE; | |
7069 | } | |
7070 | ||
7071 | struct elf_symbuf_symbol | |
7072 | { | |
7073 | unsigned long st_name; /* Symbol name, index in string tbl */ | |
7074 | unsigned char st_info; /* Type and binding attributes */ | |
7075 | unsigned char st_other; /* Visibilty, and target specific */ | |
7076 | }; | |
7077 | ||
7078 | struct elf_symbuf_head | |
7079 | { | |
7080 | struct elf_symbuf_symbol *ssym; | |
7081 | bfd_size_type count; | |
7082 | unsigned int st_shndx; | |
7083 | }; | |
7084 | ||
7085 | struct elf_symbol | |
7086 | { | |
7087 | union | |
7088 | { | |
7089 | Elf_Internal_Sym *isym; | |
7090 | struct elf_symbuf_symbol *ssym; | |
7091 | } u; | |
7092 | const char *name; | |
7093 | }; | |
7094 | ||
7095 | /* Sort references to symbols by ascending section number. */ | |
7096 | ||
7097 | static int | |
7098 | elf_sort_elf_symbol (const void *arg1, const void *arg2) | |
7099 | { | |
7100 | const Elf_Internal_Sym *s1 = *(const Elf_Internal_Sym **) arg1; | |
7101 | const Elf_Internal_Sym *s2 = *(const Elf_Internal_Sym **) arg2; | |
7102 | ||
7103 | return s1->st_shndx - s2->st_shndx; | |
7104 | } | |
7105 | ||
7106 | static int | |
7107 | elf_sym_name_compare (const void *arg1, const void *arg2) | |
7108 | { | |
7109 | const struct elf_symbol *s1 = (const struct elf_symbol *) arg1; | |
7110 | const struct elf_symbol *s2 = (const struct elf_symbol *) arg2; | |
7111 | return strcmp (s1->name, s2->name); | |
7112 | } | |
7113 | ||
7114 | static struct elf_symbuf_head * | |
7115 | elf_create_symbuf (bfd_size_type symcount, Elf_Internal_Sym *isymbuf) | |
7116 | { | |
14b1c01e | 7117 | Elf_Internal_Sym **ind, **indbufend, **indbuf; |
4d269e42 AM |
7118 | struct elf_symbuf_symbol *ssym; |
7119 | struct elf_symbuf_head *ssymbuf, *ssymhead; | |
3ae181ee | 7120 | bfd_size_type i, shndx_count, total_size; |
4d269e42 | 7121 | |
a50b1753 | 7122 | indbuf = (Elf_Internal_Sym **) bfd_malloc2 (symcount, sizeof (*indbuf)); |
4d269e42 AM |
7123 | if (indbuf == NULL) |
7124 | return NULL; | |
7125 | ||
7126 | for (ind = indbuf, i = 0; i < symcount; i++) | |
7127 | if (isymbuf[i].st_shndx != SHN_UNDEF) | |
7128 | *ind++ = &isymbuf[i]; | |
7129 | indbufend = ind; | |
7130 | ||
7131 | qsort (indbuf, indbufend - indbuf, sizeof (Elf_Internal_Sym *), | |
7132 | elf_sort_elf_symbol); | |
7133 | ||
7134 | shndx_count = 0; | |
7135 | if (indbufend > indbuf) | |
7136 | for (ind = indbuf, shndx_count++; ind < indbufend - 1; ind++) | |
7137 | if (ind[0]->st_shndx != ind[1]->st_shndx) | |
7138 | shndx_count++; | |
7139 | ||
3ae181ee L |
7140 | total_size = ((shndx_count + 1) * sizeof (*ssymbuf) |
7141 | + (indbufend - indbuf) * sizeof (*ssym)); | |
a50b1753 | 7142 | ssymbuf = (struct elf_symbuf_head *) bfd_malloc (total_size); |
4d269e42 AM |
7143 | if (ssymbuf == NULL) |
7144 | { | |
7145 | free (indbuf); | |
7146 | return NULL; | |
7147 | } | |
7148 | ||
3ae181ee | 7149 | ssym = (struct elf_symbuf_symbol *) (ssymbuf + shndx_count + 1); |
4d269e42 AM |
7150 | ssymbuf->ssym = NULL; |
7151 | ssymbuf->count = shndx_count; | |
7152 | ssymbuf->st_shndx = 0; | |
7153 | for (ssymhead = ssymbuf, ind = indbuf; ind < indbufend; ssym++, ind++) | |
7154 | { | |
7155 | if (ind == indbuf || ssymhead->st_shndx != (*ind)->st_shndx) | |
7156 | { | |
7157 | ssymhead++; | |
7158 | ssymhead->ssym = ssym; | |
7159 | ssymhead->count = 0; | |
7160 | ssymhead->st_shndx = (*ind)->st_shndx; | |
7161 | } | |
7162 | ssym->st_name = (*ind)->st_name; | |
7163 | ssym->st_info = (*ind)->st_info; | |
7164 | ssym->st_other = (*ind)->st_other; | |
7165 | ssymhead->count++; | |
7166 | } | |
3ae181ee L |
7167 | BFD_ASSERT ((bfd_size_type) (ssymhead - ssymbuf) == shndx_count |
7168 | && (((bfd_hostptr_t) ssym - (bfd_hostptr_t) ssymbuf) | |
7169 | == total_size)); | |
4d269e42 AM |
7170 | |
7171 | free (indbuf); | |
7172 | return ssymbuf; | |
7173 | } | |
7174 | ||
7175 | /* Check if 2 sections define the same set of local and global | |
7176 | symbols. */ | |
7177 | ||
8f317e31 | 7178 | static bfd_boolean |
4d269e42 AM |
7179 | bfd_elf_match_symbols_in_sections (asection *sec1, asection *sec2, |
7180 | struct bfd_link_info *info) | |
7181 | { | |
7182 | bfd *bfd1, *bfd2; | |
7183 | const struct elf_backend_data *bed1, *bed2; | |
7184 | Elf_Internal_Shdr *hdr1, *hdr2; | |
7185 | bfd_size_type symcount1, symcount2; | |
7186 | Elf_Internal_Sym *isymbuf1, *isymbuf2; | |
7187 | struct elf_symbuf_head *ssymbuf1, *ssymbuf2; | |
7188 | Elf_Internal_Sym *isym, *isymend; | |
7189 | struct elf_symbol *symtable1 = NULL, *symtable2 = NULL; | |
7190 | bfd_size_type count1, count2, i; | |
cb33740c | 7191 | unsigned int shndx1, shndx2; |
4d269e42 AM |
7192 | bfd_boolean result; |
7193 | ||
7194 | bfd1 = sec1->owner; | |
7195 | bfd2 = sec2->owner; | |
7196 | ||
4d269e42 AM |
7197 | /* Both sections have to be in ELF. */ |
7198 | if (bfd_get_flavour (bfd1) != bfd_target_elf_flavour | |
7199 | || bfd_get_flavour (bfd2) != bfd_target_elf_flavour) | |
7200 | return FALSE; | |
7201 | ||
7202 | if (elf_section_type (sec1) != elf_section_type (sec2)) | |
7203 | return FALSE; | |
7204 | ||
4d269e42 AM |
7205 | shndx1 = _bfd_elf_section_from_bfd_section (bfd1, sec1); |
7206 | shndx2 = _bfd_elf_section_from_bfd_section (bfd2, sec2); | |
cb33740c | 7207 | if (shndx1 == SHN_BAD || shndx2 == SHN_BAD) |
4d269e42 AM |
7208 | return FALSE; |
7209 | ||
7210 | bed1 = get_elf_backend_data (bfd1); | |
7211 | bed2 = get_elf_backend_data (bfd2); | |
7212 | hdr1 = &elf_tdata (bfd1)->symtab_hdr; | |
7213 | symcount1 = hdr1->sh_size / bed1->s->sizeof_sym; | |
7214 | hdr2 = &elf_tdata (bfd2)->symtab_hdr; | |
7215 | symcount2 = hdr2->sh_size / bed2->s->sizeof_sym; | |
7216 | ||
7217 | if (symcount1 == 0 || symcount2 == 0) | |
7218 | return FALSE; | |
7219 | ||
7220 | result = FALSE; | |
7221 | isymbuf1 = NULL; | |
7222 | isymbuf2 = NULL; | |
a50b1753 NC |
7223 | ssymbuf1 = (struct elf_symbuf_head *) elf_tdata (bfd1)->symbuf; |
7224 | ssymbuf2 = (struct elf_symbuf_head *) elf_tdata (bfd2)->symbuf; | |
4d269e42 AM |
7225 | |
7226 | if (ssymbuf1 == NULL) | |
7227 | { | |
7228 | isymbuf1 = bfd_elf_get_elf_syms (bfd1, hdr1, symcount1, 0, | |
7229 | NULL, NULL, NULL); | |
7230 | if (isymbuf1 == NULL) | |
7231 | goto done; | |
7232 | ||
7233 | if (!info->reduce_memory_overheads) | |
7234 | elf_tdata (bfd1)->symbuf = ssymbuf1 | |
7235 | = elf_create_symbuf (symcount1, isymbuf1); | |
7236 | } | |
7237 | ||
7238 | if (ssymbuf1 == NULL || ssymbuf2 == NULL) | |
7239 | { | |
7240 | isymbuf2 = bfd_elf_get_elf_syms (bfd2, hdr2, symcount2, 0, | |
7241 | NULL, NULL, NULL); | |
7242 | if (isymbuf2 == NULL) | |
7243 | goto done; | |
7244 | ||
7245 | if (ssymbuf1 != NULL && !info->reduce_memory_overheads) | |
7246 | elf_tdata (bfd2)->symbuf = ssymbuf2 | |
7247 | = elf_create_symbuf (symcount2, isymbuf2); | |
7248 | } | |
7249 | ||
7250 | if (ssymbuf1 != NULL && ssymbuf2 != NULL) | |
7251 | { | |
7252 | /* Optimized faster version. */ | |
7253 | bfd_size_type lo, hi, mid; | |
7254 | struct elf_symbol *symp; | |
7255 | struct elf_symbuf_symbol *ssym, *ssymend; | |
7256 | ||
7257 | lo = 0; | |
7258 | hi = ssymbuf1->count; | |
7259 | ssymbuf1++; | |
7260 | count1 = 0; | |
7261 | while (lo < hi) | |
7262 | { | |
7263 | mid = (lo + hi) / 2; | |
cb33740c | 7264 | if (shndx1 < ssymbuf1[mid].st_shndx) |
4d269e42 | 7265 | hi = mid; |
cb33740c | 7266 | else if (shndx1 > ssymbuf1[mid].st_shndx) |
4d269e42 AM |
7267 | lo = mid + 1; |
7268 | else | |
7269 | { | |
7270 | count1 = ssymbuf1[mid].count; | |
7271 | ssymbuf1 += mid; | |
7272 | break; | |
7273 | } | |
7274 | } | |
7275 | ||
7276 | lo = 0; | |
7277 | hi = ssymbuf2->count; | |
7278 | ssymbuf2++; | |
7279 | count2 = 0; | |
7280 | while (lo < hi) | |
7281 | { | |
7282 | mid = (lo + hi) / 2; | |
cb33740c | 7283 | if (shndx2 < ssymbuf2[mid].st_shndx) |
4d269e42 | 7284 | hi = mid; |
cb33740c | 7285 | else if (shndx2 > ssymbuf2[mid].st_shndx) |
4d269e42 AM |
7286 | lo = mid + 1; |
7287 | else | |
7288 | { | |
7289 | count2 = ssymbuf2[mid].count; | |
7290 | ssymbuf2 += mid; | |
7291 | break; | |
7292 | } | |
7293 | } | |
7294 | ||
7295 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7296 | goto done; | |
7297 | ||
a50b1753 NC |
7298 | symtable1 = (struct elf_symbol *) |
7299 | bfd_malloc (count1 * sizeof (struct elf_symbol)); | |
7300 | symtable2 = (struct elf_symbol *) | |
7301 | bfd_malloc (count2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7302 | if (symtable1 == NULL || symtable2 == NULL) |
7303 | goto done; | |
7304 | ||
7305 | symp = symtable1; | |
7306 | for (ssym = ssymbuf1->ssym, ssymend = ssym + count1; | |
7307 | ssym < ssymend; ssym++, symp++) | |
7308 | { | |
7309 | symp->u.ssym = ssym; | |
7310 | symp->name = bfd_elf_string_from_elf_section (bfd1, | |
7311 | hdr1->sh_link, | |
7312 | ssym->st_name); | |
7313 | } | |
7314 | ||
7315 | symp = symtable2; | |
7316 | for (ssym = ssymbuf2->ssym, ssymend = ssym + count2; | |
7317 | ssym < ssymend; ssym++, symp++) | |
7318 | { | |
7319 | symp->u.ssym = ssym; | |
7320 | symp->name = bfd_elf_string_from_elf_section (bfd2, | |
7321 | hdr2->sh_link, | |
7322 | ssym->st_name); | |
7323 | } | |
7324 | ||
7325 | /* Sort symbol by name. */ | |
7326 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7327 | elf_sym_name_compare); | |
7328 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7329 | elf_sym_name_compare); | |
7330 | ||
7331 | for (i = 0; i < count1; i++) | |
7332 | /* Two symbols must have the same binding, type and name. */ | |
7333 | if (symtable1 [i].u.ssym->st_info != symtable2 [i].u.ssym->st_info | |
7334 | || symtable1 [i].u.ssym->st_other != symtable2 [i].u.ssym->st_other | |
7335 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7336 | goto done; | |
7337 | ||
7338 | result = TRUE; | |
7339 | goto done; | |
7340 | } | |
7341 | ||
a50b1753 NC |
7342 | symtable1 = (struct elf_symbol *) |
7343 | bfd_malloc (symcount1 * sizeof (struct elf_symbol)); | |
7344 | symtable2 = (struct elf_symbol *) | |
7345 | bfd_malloc (symcount2 * sizeof (struct elf_symbol)); | |
4d269e42 AM |
7346 | if (symtable1 == NULL || symtable2 == NULL) |
7347 | goto done; | |
7348 | ||
7349 | /* Count definitions in the section. */ | |
7350 | count1 = 0; | |
7351 | for (isym = isymbuf1, isymend = isym + symcount1; isym < isymend; isym++) | |
cb33740c | 7352 | if (isym->st_shndx == shndx1) |
4d269e42 AM |
7353 | symtable1[count1++].u.isym = isym; |
7354 | ||
7355 | count2 = 0; | |
7356 | for (isym = isymbuf2, isymend = isym + symcount2; isym < isymend; isym++) | |
cb33740c | 7357 | if (isym->st_shndx == shndx2) |
4d269e42 AM |
7358 | symtable2[count2++].u.isym = isym; |
7359 | ||
7360 | if (count1 == 0 || count2 == 0 || count1 != count2) | |
7361 | goto done; | |
7362 | ||
7363 | for (i = 0; i < count1; i++) | |
7364 | symtable1[i].name | |
7365 | = bfd_elf_string_from_elf_section (bfd1, hdr1->sh_link, | |
7366 | symtable1[i].u.isym->st_name); | |
7367 | ||
7368 | for (i = 0; i < count2; i++) | |
7369 | symtable2[i].name | |
7370 | = bfd_elf_string_from_elf_section (bfd2, hdr2->sh_link, | |
7371 | symtable2[i].u.isym->st_name); | |
7372 | ||
7373 | /* Sort symbol by name. */ | |
7374 | qsort (symtable1, count1, sizeof (struct elf_symbol), | |
7375 | elf_sym_name_compare); | |
7376 | qsort (symtable2, count1, sizeof (struct elf_symbol), | |
7377 | elf_sym_name_compare); | |
7378 | ||
7379 | for (i = 0; i < count1; i++) | |
7380 | /* Two symbols must have the same binding, type and name. */ | |
7381 | if (symtable1 [i].u.isym->st_info != symtable2 [i].u.isym->st_info | |
7382 | || symtable1 [i].u.isym->st_other != symtable2 [i].u.isym->st_other | |
7383 | || strcmp (symtable1 [i].name, symtable2 [i].name) != 0) | |
7384 | goto done; | |
7385 | ||
7386 | result = TRUE; | |
7387 | ||
7388 | done: | |
7389 | if (symtable1) | |
7390 | free (symtable1); | |
7391 | if (symtable2) | |
7392 | free (symtable2); | |
7393 | if (isymbuf1) | |
7394 | free (isymbuf1); | |
7395 | if (isymbuf2) | |
7396 | free (isymbuf2); | |
7397 | ||
7398 | return result; | |
7399 | } | |
7400 | ||
7401 | /* Return TRUE if 2 section types are compatible. */ | |
7402 | ||
7403 | bfd_boolean | |
7404 | _bfd_elf_match_sections_by_type (bfd *abfd, const asection *asec, | |
7405 | bfd *bbfd, const asection *bsec) | |
7406 | { | |
7407 | if (asec == NULL | |
7408 | || bsec == NULL | |
7409 | || abfd->xvec->flavour != bfd_target_elf_flavour | |
7410 | || bbfd->xvec->flavour != bfd_target_elf_flavour) | |
7411 | return TRUE; | |
7412 | ||
7413 | return elf_section_type (asec) == elf_section_type (bsec); | |
7414 | } | |
7415 | \f | |
c152c796 AM |
7416 | /* Final phase of ELF linker. */ |
7417 | ||
7418 | /* A structure we use to avoid passing large numbers of arguments. */ | |
7419 | ||
7420 | struct elf_final_link_info | |
7421 | { | |
7422 | /* General link information. */ | |
7423 | struct bfd_link_info *info; | |
7424 | /* Output BFD. */ | |
7425 | bfd *output_bfd; | |
7426 | /* Symbol string table. */ | |
7427 | struct bfd_strtab_hash *symstrtab; | |
7428 | /* .dynsym section. */ | |
7429 | asection *dynsym_sec; | |
7430 | /* .hash section. */ | |
7431 | asection *hash_sec; | |
7432 | /* symbol version section (.gnu.version). */ | |
7433 | asection *symver_sec; | |
7434 | /* Buffer large enough to hold contents of any section. */ | |
7435 | bfd_byte *contents; | |
7436 | /* Buffer large enough to hold external relocs of any section. */ | |
7437 | void *external_relocs; | |
7438 | /* Buffer large enough to hold internal relocs of any section. */ | |
7439 | Elf_Internal_Rela *internal_relocs; | |
7440 | /* Buffer large enough to hold external local symbols of any input | |
7441 | BFD. */ | |
7442 | bfd_byte *external_syms; | |
7443 | /* And a buffer for symbol section indices. */ | |
7444 | Elf_External_Sym_Shndx *locsym_shndx; | |
7445 | /* Buffer large enough to hold internal local symbols of any input | |
7446 | BFD. */ | |
7447 | Elf_Internal_Sym *internal_syms; | |
7448 | /* Array large enough to hold a symbol index for each local symbol | |
7449 | of any input BFD. */ | |
7450 | long *indices; | |
7451 | /* Array large enough to hold a section pointer for each local | |
7452 | symbol of any input BFD. */ | |
7453 | asection **sections; | |
7454 | /* Buffer to hold swapped out symbols. */ | |
7455 | bfd_byte *symbuf; | |
7456 | /* And one for symbol section indices. */ | |
7457 | Elf_External_Sym_Shndx *symshndxbuf; | |
7458 | /* Number of swapped out symbols in buffer. */ | |
7459 | size_t symbuf_count; | |
7460 | /* Number of symbols which fit in symbuf. */ | |
7461 | size_t symbuf_size; | |
7462 | /* And same for symshndxbuf. */ | |
7463 | size_t shndxbuf_size; | |
ffbc01cc AM |
7464 | /* Number of STT_FILE syms seen. */ |
7465 | size_t filesym_count; | |
c152c796 AM |
7466 | }; |
7467 | ||
7468 | /* This struct is used to pass information to elf_link_output_extsym. */ | |
7469 | ||
7470 | struct elf_outext_info | |
7471 | { | |
7472 | bfd_boolean failed; | |
7473 | bfd_boolean localsyms; | |
ffbc01cc AM |
7474 | bfd_boolean need_second_pass; |
7475 | bfd_boolean second_pass; | |
34a79995 | 7476 | bfd_boolean file_sym_done; |
8b127cbc | 7477 | struct elf_final_link_info *flinfo; |
c152c796 AM |
7478 | }; |
7479 | ||
d9352518 DB |
7480 | |
7481 | /* Support for evaluating a complex relocation. | |
7482 | ||
7483 | Complex relocations are generalized, self-describing relocations. The | |
7484 | implementation of them consists of two parts: complex symbols, and the | |
a0c8462f | 7485 | relocations themselves. |
d9352518 DB |
7486 | |
7487 | The relocations are use a reserved elf-wide relocation type code (R_RELC | |
7488 | external / BFD_RELOC_RELC internal) and an encoding of relocation field | |
7489 | information (start bit, end bit, word width, etc) into the addend. This | |
7490 | information is extracted from CGEN-generated operand tables within gas. | |
7491 | ||
7492 | Complex symbols are mangled symbols (BSF_RELC external / STT_RELC | |
7493 | internal) representing prefix-notation expressions, including but not | |
7494 | limited to those sorts of expressions normally encoded as addends in the | |
7495 | addend field. The symbol mangling format is: | |
7496 | ||
7497 | <node> := <literal> | |
7498 | | <unary-operator> ':' <node> | |
7499 | | <binary-operator> ':' <node> ':' <node> | |
7500 | ; | |
7501 | ||
7502 | <literal> := 's' <digits=N> ':' <N character symbol name> | |
7503 | | 'S' <digits=N> ':' <N character section name> | |
7504 | | '#' <hexdigits> | |
7505 | ; | |
7506 | ||
7507 | <binary-operator> := as in C | |
7508 | <unary-operator> := as in C, plus "0-" for unambiguous negation. */ | |
7509 | ||
7510 | static void | |
a0c8462f AM |
7511 | set_symbol_value (bfd *bfd_with_globals, |
7512 | Elf_Internal_Sym *isymbuf, | |
7513 | size_t locsymcount, | |
7514 | size_t symidx, | |
7515 | bfd_vma val) | |
d9352518 | 7516 | { |
8977835c AM |
7517 | struct elf_link_hash_entry **sym_hashes; |
7518 | struct elf_link_hash_entry *h; | |
7519 | size_t extsymoff = locsymcount; | |
d9352518 | 7520 | |
8977835c | 7521 | if (symidx < locsymcount) |
d9352518 | 7522 | { |
8977835c AM |
7523 | Elf_Internal_Sym *sym; |
7524 | ||
7525 | sym = isymbuf + symidx; | |
7526 | if (ELF_ST_BIND (sym->st_info) == STB_LOCAL) | |
7527 | { | |
7528 | /* It is a local symbol: move it to the | |
7529 | "absolute" section and give it a value. */ | |
7530 | sym->st_shndx = SHN_ABS; | |
7531 | sym->st_value = val; | |
7532 | return; | |
7533 | } | |
7534 | BFD_ASSERT (elf_bad_symtab (bfd_with_globals)); | |
7535 | extsymoff = 0; | |
d9352518 | 7536 | } |
8977835c AM |
7537 | |
7538 | /* It is a global symbol: set its link type | |
7539 | to "defined" and give it a value. */ | |
7540 | ||
7541 | sym_hashes = elf_sym_hashes (bfd_with_globals); | |
7542 | h = sym_hashes [symidx - extsymoff]; | |
7543 | while (h->root.type == bfd_link_hash_indirect | |
7544 | || h->root.type == bfd_link_hash_warning) | |
7545 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
7546 | h->root.type = bfd_link_hash_defined; | |
7547 | h->root.u.def.value = val; | |
7548 | h->root.u.def.section = bfd_abs_section_ptr; | |
d9352518 DB |
7549 | } |
7550 | ||
a0c8462f AM |
7551 | static bfd_boolean |
7552 | resolve_symbol (const char *name, | |
7553 | bfd *input_bfd, | |
8b127cbc | 7554 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7555 | bfd_vma *result, |
7556 | Elf_Internal_Sym *isymbuf, | |
7557 | size_t locsymcount) | |
d9352518 | 7558 | { |
a0c8462f AM |
7559 | Elf_Internal_Sym *sym; |
7560 | struct bfd_link_hash_entry *global_entry; | |
7561 | const char *candidate = NULL; | |
7562 | Elf_Internal_Shdr *symtab_hdr; | |
7563 | size_t i; | |
7564 | ||
d9352518 DB |
7565 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
7566 | ||
7567 | for (i = 0; i < locsymcount; ++ i) | |
7568 | { | |
8977835c | 7569 | sym = isymbuf + i; |
d9352518 DB |
7570 | |
7571 | if (ELF_ST_BIND (sym->st_info) != STB_LOCAL) | |
7572 | continue; | |
7573 | ||
7574 | candidate = bfd_elf_string_from_elf_section (input_bfd, | |
7575 | symtab_hdr->sh_link, | |
7576 | sym->st_name); | |
7577 | #ifdef DEBUG | |
0f02bbd9 AM |
7578 | printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n", |
7579 | name, candidate, (unsigned long) sym->st_value); | |
d9352518 DB |
7580 | #endif |
7581 | if (candidate && strcmp (candidate, name) == 0) | |
7582 | { | |
8b127cbc | 7583 | asection *sec = flinfo->sections [i]; |
d9352518 | 7584 | |
0f02bbd9 AM |
7585 | *result = _bfd_elf_rel_local_sym (input_bfd, sym, &sec, 0); |
7586 | *result += sec->output_offset + sec->output_section->vma; | |
d9352518 | 7587 | #ifdef DEBUG |
0f02bbd9 AM |
7588 | printf ("Found symbol with value %8.8lx\n", |
7589 | (unsigned long) *result); | |
d9352518 DB |
7590 | #endif |
7591 | return TRUE; | |
7592 | } | |
7593 | } | |
7594 | ||
7595 | /* Hmm, haven't found it yet. perhaps it is a global. */ | |
8b127cbc | 7596 | global_entry = bfd_link_hash_lookup (flinfo->info->hash, name, |
a0c8462f | 7597 | FALSE, FALSE, TRUE); |
d9352518 DB |
7598 | if (!global_entry) |
7599 | return FALSE; | |
a0c8462f | 7600 | |
d9352518 DB |
7601 | if (global_entry->type == bfd_link_hash_defined |
7602 | || global_entry->type == bfd_link_hash_defweak) | |
7603 | { | |
a0c8462f AM |
7604 | *result = (global_entry->u.def.value |
7605 | + global_entry->u.def.section->output_section->vma | |
7606 | + global_entry->u.def.section->output_offset); | |
d9352518 | 7607 | #ifdef DEBUG |
0f02bbd9 AM |
7608 | printf ("Found GLOBAL symbol '%s' with value %8.8lx\n", |
7609 | global_entry->root.string, (unsigned long) *result); | |
d9352518 DB |
7610 | #endif |
7611 | return TRUE; | |
a0c8462f | 7612 | } |
d9352518 | 7613 | |
d9352518 DB |
7614 | return FALSE; |
7615 | } | |
7616 | ||
7617 | static bfd_boolean | |
a0c8462f AM |
7618 | resolve_section (const char *name, |
7619 | asection *sections, | |
7620 | bfd_vma *result) | |
d9352518 | 7621 | { |
a0c8462f AM |
7622 | asection *curr; |
7623 | unsigned int len; | |
d9352518 | 7624 | |
a0c8462f | 7625 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7626 | if (strcmp (curr->name, name) == 0) |
7627 | { | |
7628 | *result = curr->vma; | |
7629 | return TRUE; | |
7630 | } | |
7631 | ||
7632 | /* Hmm. still haven't found it. try pseudo-section names. */ | |
a0c8462f | 7633 | for (curr = sections; curr; curr = curr->next) |
d9352518 DB |
7634 | { |
7635 | len = strlen (curr->name); | |
a0c8462f | 7636 | if (len > strlen (name)) |
d9352518 DB |
7637 | continue; |
7638 | ||
7639 | if (strncmp (curr->name, name, len) == 0) | |
7640 | { | |
7641 | if (strncmp (".end", name + len, 4) == 0) | |
7642 | { | |
7643 | *result = curr->vma + curr->size; | |
7644 | return TRUE; | |
7645 | } | |
7646 | ||
7647 | /* Insert more pseudo-section names here, if you like. */ | |
7648 | } | |
7649 | } | |
a0c8462f | 7650 | |
d9352518 DB |
7651 | return FALSE; |
7652 | } | |
7653 | ||
7654 | static void | |
a0c8462f | 7655 | undefined_reference (const char *reftype, const char *name) |
d9352518 | 7656 | { |
a0c8462f AM |
7657 | _bfd_error_handler (_("undefined %s reference in complex symbol: %s"), |
7658 | reftype, name); | |
d9352518 DB |
7659 | } |
7660 | ||
7661 | static bfd_boolean | |
a0c8462f AM |
7662 | eval_symbol (bfd_vma *result, |
7663 | const char **symp, | |
7664 | bfd *input_bfd, | |
8b127cbc | 7665 | struct elf_final_link_info *flinfo, |
a0c8462f AM |
7666 | bfd_vma dot, |
7667 | Elf_Internal_Sym *isymbuf, | |
7668 | size_t locsymcount, | |
7669 | int signed_p) | |
d9352518 | 7670 | { |
4b93929b NC |
7671 | size_t len; |
7672 | size_t symlen; | |
a0c8462f AM |
7673 | bfd_vma a; |
7674 | bfd_vma b; | |
4b93929b | 7675 | char symbuf[4096]; |
0f02bbd9 | 7676 | const char *sym = *symp; |
a0c8462f AM |
7677 | const char *symend; |
7678 | bfd_boolean symbol_is_section = FALSE; | |
d9352518 DB |
7679 | |
7680 | len = strlen (sym); | |
7681 | symend = sym + len; | |
7682 | ||
4b93929b | 7683 | if (len < 1 || len > sizeof (symbuf)) |
d9352518 DB |
7684 | { |
7685 | bfd_set_error (bfd_error_invalid_operation); | |
7686 | return FALSE; | |
7687 | } | |
a0c8462f | 7688 | |
d9352518 DB |
7689 | switch (* sym) |
7690 | { | |
7691 | case '.': | |
0f02bbd9 AM |
7692 | *result = dot; |
7693 | *symp = sym + 1; | |
d9352518 DB |
7694 | return TRUE; |
7695 | ||
7696 | case '#': | |
0f02bbd9 AM |
7697 | ++sym; |
7698 | *result = strtoul (sym, (char **) symp, 16); | |
d9352518 DB |
7699 | return TRUE; |
7700 | ||
7701 | case 'S': | |
7702 | symbol_is_section = TRUE; | |
a0c8462f | 7703 | case 's': |
0f02bbd9 AM |
7704 | ++sym; |
7705 | symlen = strtol (sym, (char **) symp, 10); | |
7706 | sym = *symp + 1; /* Skip the trailing ':'. */ | |
d9352518 | 7707 | |
4b93929b | 7708 | if (symend < sym || symlen + 1 > sizeof (symbuf)) |
d9352518 DB |
7709 | { |
7710 | bfd_set_error (bfd_error_invalid_operation); | |
7711 | return FALSE; | |
7712 | } | |
7713 | ||
7714 | memcpy (symbuf, sym, symlen); | |
a0c8462f | 7715 | symbuf[symlen] = '\0'; |
0f02bbd9 | 7716 | *symp = sym + symlen; |
a0c8462f AM |
7717 | |
7718 | /* Is it always possible, with complex symbols, that gas "mis-guessed" | |
d9352518 DB |
7719 | the symbol as a section, or vice-versa. so we're pretty liberal in our |
7720 | interpretation here; section means "try section first", not "must be a | |
7721 | section", and likewise with symbol. */ | |
7722 | ||
a0c8462f | 7723 | if (symbol_is_section) |
d9352518 | 7724 | { |
8b127cbc AM |
7725 | if (!resolve_section (symbuf, flinfo->output_bfd->sections, result) |
7726 | && !resolve_symbol (symbuf, input_bfd, flinfo, result, | |
8977835c | 7727 | isymbuf, locsymcount)) |
d9352518 DB |
7728 | { |
7729 | undefined_reference ("section", symbuf); | |
7730 | return FALSE; | |
7731 | } | |
a0c8462f AM |
7732 | } |
7733 | else | |
d9352518 | 7734 | { |
8b127cbc | 7735 | if (!resolve_symbol (symbuf, input_bfd, flinfo, result, |
8977835c | 7736 | isymbuf, locsymcount) |
8b127cbc | 7737 | && !resolve_section (symbuf, flinfo->output_bfd->sections, |
8977835c | 7738 | result)) |
d9352518 DB |
7739 | { |
7740 | undefined_reference ("symbol", symbuf); | |
7741 | return FALSE; | |
7742 | } | |
7743 | } | |
7744 | ||
7745 | return TRUE; | |
a0c8462f | 7746 | |
d9352518 DB |
7747 | /* All that remains are operators. */ |
7748 | ||
7749 | #define UNARY_OP(op) \ | |
7750 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7751 | { \ | |
7752 | sym += strlen (#op); \ | |
a0c8462f AM |
7753 | if (*sym == ':') \ |
7754 | ++sym; \ | |
0f02bbd9 | 7755 | *symp = sym; \ |
8b127cbc | 7756 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7757 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7758 | return FALSE; \ |
7759 | if (signed_p) \ | |
0f02bbd9 | 7760 | *result = op ((bfd_signed_vma) a); \ |
a0c8462f AM |
7761 | else \ |
7762 | *result = op a; \ | |
d9352518 DB |
7763 | return TRUE; \ |
7764 | } | |
7765 | ||
7766 | #define BINARY_OP(op) \ | |
7767 | if (strncmp (sym, #op, strlen (#op)) == 0) \ | |
7768 | { \ | |
7769 | sym += strlen (#op); \ | |
a0c8462f AM |
7770 | if (*sym == ':') \ |
7771 | ++sym; \ | |
0f02bbd9 | 7772 | *symp = sym; \ |
8b127cbc | 7773 | if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7774 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f | 7775 | return FALSE; \ |
0f02bbd9 | 7776 | ++*symp; \ |
8b127cbc | 7777 | if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \ |
0f02bbd9 | 7778 | isymbuf, locsymcount, signed_p)) \ |
a0c8462f AM |
7779 | return FALSE; \ |
7780 | if (signed_p) \ | |
0f02bbd9 | 7781 | *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \ |
a0c8462f AM |
7782 | else \ |
7783 | *result = a op b; \ | |
d9352518 DB |
7784 | return TRUE; \ |
7785 | } | |
7786 | ||
7787 | default: | |
7788 | UNARY_OP (0-); | |
7789 | BINARY_OP (<<); | |
7790 | BINARY_OP (>>); | |
7791 | BINARY_OP (==); | |
7792 | BINARY_OP (!=); | |
7793 | BINARY_OP (<=); | |
7794 | BINARY_OP (>=); | |
7795 | BINARY_OP (&&); | |
7796 | BINARY_OP (||); | |
7797 | UNARY_OP (~); | |
7798 | UNARY_OP (!); | |
7799 | BINARY_OP (*); | |
7800 | BINARY_OP (/); | |
7801 | BINARY_OP (%); | |
7802 | BINARY_OP (^); | |
7803 | BINARY_OP (|); | |
7804 | BINARY_OP (&); | |
7805 | BINARY_OP (+); | |
7806 | BINARY_OP (-); | |
7807 | BINARY_OP (<); | |
7808 | BINARY_OP (>); | |
7809 | #undef UNARY_OP | |
7810 | #undef BINARY_OP | |
7811 | _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym); | |
7812 | bfd_set_error (bfd_error_invalid_operation); | |
7813 | return FALSE; | |
7814 | } | |
7815 | } | |
7816 | ||
d9352518 | 7817 | static void |
a0c8462f AM |
7818 | put_value (bfd_vma size, |
7819 | unsigned long chunksz, | |
7820 | bfd *input_bfd, | |
7821 | bfd_vma x, | |
7822 | bfd_byte *location) | |
d9352518 DB |
7823 | { |
7824 | location += (size - chunksz); | |
7825 | ||
a0c8462f | 7826 | for (; size; size -= chunksz, location -= chunksz, x >>= (chunksz * 8)) |
d9352518 DB |
7827 | { |
7828 | switch (chunksz) | |
7829 | { | |
7830 | default: | |
7831 | case 0: | |
7832 | abort (); | |
7833 | case 1: | |
7834 | bfd_put_8 (input_bfd, x, location); | |
7835 | break; | |
7836 | case 2: | |
7837 | bfd_put_16 (input_bfd, x, location); | |
7838 | break; | |
7839 | case 4: | |
7840 | bfd_put_32 (input_bfd, x, location); | |
7841 | break; | |
7842 | case 8: | |
7843 | #ifdef BFD64 | |
7844 | bfd_put_64 (input_bfd, x, location); | |
7845 | #else | |
7846 | abort (); | |
7847 | #endif | |
7848 | break; | |
7849 | } | |
7850 | } | |
7851 | } | |
7852 | ||
a0c8462f AM |
7853 | static bfd_vma |
7854 | get_value (bfd_vma size, | |
7855 | unsigned long chunksz, | |
7856 | bfd *input_bfd, | |
7857 | bfd_byte *location) | |
d9352518 | 7858 | { |
9b239e0e | 7859 | int shift; |
d9352518 DB |
7860 | bfd_vma x = 0; |
7861 | ||
9b239e0e NC |
7862 | /* Sanity checks. */ |
7863 | BFD_ASSERT (chunksz <= sizeof (x) | |
7864 | && size >= chunksz | |
7865 | && chunksz != 0 | |
7866 | && (size % chunksz) == 0 | |
7867 | && input_bfd != NULL | |
7868 | && location != NULL); | |
7869 | ||
7870 | if (chunksz == sizeof (x)) | |
7871 | { | |
7872 | BFD_ASSERT (size == chunksz); | |
7873 | ||
7874 | /* Make sure that we do not perform an undefined shift operation. | |
7875 | We know that size == chunksz so there will only be one iteration | |
7876 | of the loop below. */ | |
7877 | shift = 0; | |
7878 | } | |
7879 | else | |
7880 | shift = 8 * chunksz; | |
7881 | ||
a0c8462f | 7882 | for (; size; size -= chunksz, location += chunksz) |
d9352518 DB |
7883 | { |
7884 | switch (chunksz) | |
7885 | { | |
d9352518 | 7886 | case 1: |
9b239e0e | 7887 | x = (x << shift) | bfd_get_8 (input_bfd, location); |
d9352518 DB |
7888 | break; |
7889 | case 2: | |
9b239e0e | 7890 | x = (x << shift) | bfd_get_16 (input_bfd, location); |
d9352518 DB |
7891 | break; |
7892 | case 4: | |
9b239e0e | 7893 | x = (x << shift) | bfd_get_32 (input_bfd, location); |
d9352518 | 7894 | break; |
d9352518 | 7895 | #ifdef BFD64 |
9b239e0e NC |
7896 | case 8: |
7897 | x = (x << shift) | bfd_get_64 (input_bfd, location); | |
d9352518 | 7898 | break; |
9b239e0e NC |
7899 | #endif |
7900 | default: | |
7901 | abort (); | |
d9352518 DB |
7902 | } |
7903 | } | |
7904 | return x; | |
7905 | } | |
7906 | ||
a0c8462f AM |
7907 | static void |
7908 | decode_complex_addend (unsigned long *start, /* in bits */ | |
7909 | unsigned long *oplen, /* in bits */ | |
7910 | unsigned long *len, /* in bits */ | |
7911 | unsigned long *wordsz, /* in bytes */ | |
7912 | unsigned long *chunksz, /* in bytes */ | |
7913 | unsigned long *lsb0_p, | |
7914 | unsigned long *signed_p, | |
7915 | unsigned long *trunc_p, | |
7916 | unsigned long encoded) | |
d9352518 DB |
7917 | { |
7918 | * start = encoded & 0x3F; | |
7919 | * len = (encoded >> 6) & 0x3F; | |
7920 | * oplen = (encoded >> 12) & 0x3F; | |
7921 | * wordsz = (encoded >> 18) & 0xF; | |
7922 | * chunksz = (encoded >> 22) & 0xF; | |
7923 | * lsb0_p = (encoded >> 27) & 1; | |
7924 | * signed_p = (encoded >> 28) & 1; | |
7925 | * trunc_p = (encoded >> 29) & 1; | |
7926 | } | |
7927 | ||
cdfeee4f | 7928 | bfd_reloc_status_type |
0f02bbd9 | 7929 | bfd_elf_perform_complex_relocation (bfd *input_bfd, |
cdfeee4f | 7930 | asection *input_section ATTRIBUTE_UNUSED, |
0f02bbd9 AM |
7931 | bfd_byte *contents, |
7932 | Elf_Internal_Rela *rel, | |
7933 | bfd_vma relocation) | |
d9352518 | 7934 | { |
0f02bbd9 AM |
7935 | bfd_vma shift, x, mask; |
7936 | unsigned long start, oplen, len, wordsz, chunksz, lsb0_p, signed_p, trunc_p; | |
cdfeee4f | 7937 | bfd_reloc_status_type r; |
d9352518 DB |
7938 | |
7939 | /* Perform this reloc, since it is complex. | |
7940 | (this is not to say that it necessarily refers to a complex | |
7941 | symbol; merely that it is a self-describing CGEN based reloc. | |
7942 | i.e. the addend has the complete reloc information (bit start, end, | |
a0c8462f | 7943 | word size, etc) encoded within it.). */ |
d9352518 | 7944 | |
a0c8462f AM |
7945 | decode_complex_addend (&start, &oplen, &len, &wordsz, |
7946 | &chunksz, &lsb0_p, &signed_p, | |
7947 | &trunc_p, rel->r_addend); | |
d9352518 DB |
7948 | |
7949 | mask = (((1L << (len - 1)) - 1) << 1) | 1; | |
7950 | ||
7951 | if (lsb0_p) | |
7952 | shift = (start + 1) - len; | |
7953 | else | |
7954 | shift = (8 * wordsz) - (start + len); | |
7955 | ||
5dabe785 | 7956 | /* FIXME: octets_per_byte. */ |
a0c8462f | 7957 | x = get_value (wordsz, chunksz, input_bfd, contents + rel->r_offset); |
d9352518 DB |
7958 | |
7959 | #ifdef DEBUG | |
7960 | printf ("Doing complex reloc: " | |
7961 | "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, " | |
7962 | "chunksz %ld, start %ld, len %ld, oplen %ld\n" | |
7963 | " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n", | |
7964 | lsb0_p, signed_p, trunc_p, wordsz, chunksz, start, len, | |
9ccb8af9 AM |
7965 | oplen, (unsigned long) x, (unsigned long) mask, |
7966 | (unsigned long) relocation); | |
d9352518 DB |
7967 | #endif |
7968 | ||
cdfeee4f | 7969 | r = bfd_reloc_ok; |
d9352518 | 7970 | if (! trunc_p) |
cdfeee4f AM |
7971 | /* Now do an overflow check. */ |
7972 | r = bfd_check_overflow ((signed_p | |
7973 | ? complain_overflow_signed | |
7974 | : complain_overflow_unsigned), | |
7975 | len, 0, (8 * wordsz), | |
7976 | relocation); | |
a0c8462f | 7977 | |
d9352518 DB |
7978 | /* Do the deed. */ |
7979 | x = (x & ~(mask << shift)) | ((relocation & mask) << shift); | |
7980 | ||
7981 | #ifdef DEBUG | |
7982 | printf (" relocation: %8.8lx\n" | |
7983 | " shifted mask: %8.8lx\n" | |
7984 | " shifted/masked reloc: %8.8lx\n" | |
7985 | " result: %8.8lx\n", | |
9ccb8af9 AM |
7986 | (unsigned long) relocation, (unsigned long) (mask << shift), |
7987 | (unsigned long) ((relocation & mask) << shift), (unsigned long) x); | |
d9352518 | 7988 | #endif |
5dabe785 | 7989 | /* FIXME: octets_per_byte. */ |
d9352518 | 7990 | put_value (wordsz, chunksz, input_bfd, x, contents + rel->r_offset); |
cdfeee4f | 7991 | return r; |
d9352518 DB |
7992 | } |
7993 | ||
c152c796 AM |
7994 | /* When performing a relocatable link, the input relocations are |
7995 | preserved. But, if they reference global symbols, the indices | |
d4730f92 BS |
7996 | referenced must be updated. Update all the relocations found in |
7997 | RELDATA. */ | |
c152c796 AM |
7998 | |
7999 | static void | |
8000 | elf_link_adjust_relocs (bfd *abfd, | |
d4730f92 | 8001 | struct bfd_elf_section_reloc_data *reldata) |
c152c796 AM |
8002 | { |
8003 | unsigned int i; | |
8004 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8005 | bfd_byte *erela; | |
8006 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8007 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8008 | bfd_vma r_type_mask; | |
8009 | int r_sym_shift; | |
d4730f92 BS |
8010 | unsigned int count = reldata->count; |
8011 | struct elf_link_hash_entry **rel_hash = reldata->hashes; | |
c152c796 | 8012 | |
d4730f92 | 8013 | if (reldata->hdr->sh_entsize == bed->s->sizeof_rel) |
c152c796 AM |
8014 | { |
8015 | swap_in = bed->s->swap_reloc_in; | |
8016 | swap_out = bed->s->swap_reloc_out; | |
8017 | } | |
d4730f92 | 8018 | else if (reldata->hdr->sh_entsize == bed->s->sizeof_rela) |
c152c796 AM |
8019 | { |
8020 | swap_in = bed->s->swap_reloca_in; | |
8021 | swap_out = bed->s->swap_reloca_out; | |
8022 | } | |
8023 | else | |
8024 | abort (); | |
8025 | ||
8026 | if (bed->s->int_rels_per_ext_rel > MAX_INT_RELS_PER_EXT_REL) | |
8027 | abort (); | |
8028 | ||
8029 | if (bed->s->arch_size == 32) | |
8030 | { | |
8031 | r_type_mask = 0xff; | |
8032 | r_sym_shift = 8; | |
8033 | } | |
8034 | else | |
8035 | { | |
8036 | r_type_mask = 0xffffffff; | |
8037 | r_sym_shift = 32; | |
8038 | } | |
8039 | ||
d4730f92 BS |
8040 | erela = reldata->hdr->contents; |
8041 | for (i = 0; i < count; i++, rel_hash++, erela += reldata->hdr->sh_entsize) | |
c152c796 AM |
8042 | { |
8043 | Elf_Internal_Rela irela[MAX_INT_RELS_PER_EXT_REL]; | |
8044 | unsigned int j; | |
8045 | ||
8046 | if (*rel_hash == NULL) | |
8047 | continue; | |
8048 | ||
8049 | BFD_ASSERT ((*rel_hash)->indx >= 0); | |
8050 | ||
8051 | (*swap_in) (abfd, erela, irela); | |
8052 | for (j = 0; j < bed->s->int_rels_per_ext_rel; j++) | |
8053 | irela[j].r_info = ((bfd_vma) (*rel_hash)->indx << r_sym_shift | |
8054 | | (irela[j].r_info & r_type_mask)); | |
8055 | (*swap_out) (abfd, irela, erela); | |
8056 | } | |
8057 | } | |
8058 | ||
8059 | struct elf_link_sort_rela | |
8060 | { | |
8061 | union { | |
8062 | bfd_vma offset; | |
8063 | bfd_vma sym_mask; | |
8064 | } u; | |
8065 | enum elf_reloc_type_class type; | |
8066 | /* We use this as an array of size int_rels_per_ext_rel. */ | |
8067 | Elf_Internal_Rela rela[1]; | |
8068 | }; | |
8069 | ||
8070 | static int | |
8071 | elf_link_sort_cmp1 (const void *A, const void *B) | |
8072 | { | |
a50b1753 NC |
8073 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8074 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 AM |
8075 | int relativea, relativeb; |
8076 | ||
8077 | relativea = a->type == reloc_class_relative; | |
8078 | relativeb = b->type == reloc_class_relative; | |
8079 | ||
8080 | if (relativea < relativeb) | |
8081 | return 1; | |
8082 | if (relativea > relativeb) | |
8083 | return -1; | |
8084 | if ((a->rela->r_info & a->u.sym_mask) < (b->rela->r_info & b->u.sym_mask)) | |
8085 | return -1; | |
8086 | if ((a->rela->r_info & a->u.sym_mask) > (b->rela->r_info & b->u.sym_mask)) | |
8087 | return 1; | |
8088 | if (a->rela->r_offset < b->rela->r_offset) | |
8089 | return -1; | |
8090 | if (a->rela->r_offset > b->rela->r_offset) | |
8091 | return 1; | |
8092 | return 0; | |
8093 | } | |
8094 | ||
8095 | static int | |
8096 | elf_link_sort_cmp2 (const void *A, const void *B) | |
8097 | { | |
a50b1753 NC |
8098 | const struct elf_link_sort_rela *a = (const struct elf_link_sort_rela *) A; |
8099 | const struct elf_link_sort_rela *b = (const struct elf_link_sort_rela *) B; | |
c152c796 | 8100 | |
7e612e98 | 8101 | if (a->type < b->type) |
c152c796 | 8102 | return -1; |
7e612e98 | 8103 | if (a->type > b->type) |
c152c796 | 8104 | return 1; |
7e612e98 | 8105 | if (a->u.offset < b->u.offset) |
c152c796 | 8106 | return -1; |
7e612e98 | 8107 | if (a->u.offset > b->u.offset) |
c152c796 AM |
8108 | return 1; |
8109 | if (a->rela->r_offset < b->rela->r_offset) | |
8110 | return -1; | |
8111 | if (a->rela->r_offset > b->rela->r_offset) | |
8112 | return 1; | |
8113 | return 0; | |
8114 | } | |
8115 | ||
8116 | static size_t | |
8117 | elf_link_sort_relocs (bfd *abfd, struct bfd_link_info *info, asection **psec) | |
8118 | { | |
3410fea8 | 8119 | asection *dynamic_relocs; |
fc66a176 L |
8120 | asection *rela_dyn; |
8121 | asection *rel_dyn; | |
c152c796 AM |
8122 | bfd_size_type count, size; |
8123 | size_t i, ret, sort_elt, ext_size; | |
8124 | bfd_byte *sort, *s_non_relative, *p; | |
8125 | struct elf_link_sort_rela *sq; | |
8126 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
8127 | int i2e = bed->s->int_rels_per_ext_rel; | |
8128 | void (*swap_in) (bfd *, const bfd_byte *, Elf_Internal_Rela *); | |
8129 | void (*swap_out) (bfd *, const Elf_Internal_Rela *, bfd_byte *); | |
8130 | struct bfd_link_order *lo; | |
8131 | bfd_vma r_sym_mask; | |
3410fea8 | 8132 | bfd_boolean use_rela; |
c152c796 | 8133 | |
3410fea8 NC |
8134 | /* Find a dynamic reloc section. */ |
8135 | rela_dyn = bfd_get_section_by_name (abfd, ".rela.dyn"); | |
8136 | rel_dyn = bfd_get_section_by_name (abfd, ".rel.dyn"); | |
8137 | if (rela_dyn != NULL && rela_dyn->size > 0 | |
8138 | && rel_dyn != NULL && rel_dyn->size > 0) | |
c152c796 | 8139 | { |
3410fea8 NC |
8140 | bfd_boolean use_rela_initialised = FALSE; |
8141 | ||
8142 | /* This is just here to stop gcc from complaining. | |
8143 | It's initialization checking code is not perfect. */ | |
8144 | use_rela = TRUE; | |
8145 | ||
8146 | /* Both sections are present. Examine the sizes | |
8147 | of the indirect sections to help us choose. */ | |
8148 | for (lo = rela_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8149 | if (lo->type == bfd_indirect_link_order) | |
8150 | { | |
8151 | asection *o = lo->u.indirect.section; | |
8152 | ||
8153 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8154 | { | |
8155 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8156 | /* Section size is divisible by both rel and rela sizes. | |
8157 | It is of no help to us. */ | |
8158 | ; | |
8159 | else | |
8160 | { | |
8161 | /* Section size is only divisible by rela. */ | |
8162 | if (use_rela_initialised && (use_rela == FALSE)) | |
8163 | { | |
8164 | _bfd_error_handler | |
8165 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8166 | bfd_set_error (bfd_error_invalid_operation); | |
8167 | return 0; | |
8168 | } | |
8169 | else | |
8170 | { | |
8171 | use_rela = TRUE; | |
8172 | use_rela_initialised = TRUE; | |
8173 | } | |
8174 | } | |
8175 | } | |
8176 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8177 | { | |
8178 | /* Section size is only divisible by rel. */ | |
8179 | if (use_rela_initialised && (use_rela == TRUE)) | |
8180 | { | |
8181 | _bfd_error_handler | |
8182 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8183 | bfd_set_error (bfd_error_invalid_operation); | |
8184 | return 0; | |
8185 | } | |
8186 | else | |
8187 | { | |
8188 | use_rela = FALSE; | |
8189 | use_rela_initialised = TRUE; | |
8190 | } | |
8191 | } | |
8192 | else | |
8193 | { | |
8194 | /* The section size is not divisible by either - something is wrong. */ | |
8195 | _bfd_error_handler | |
8196 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8197 | bfd_set_error (bfd_error_invalid_operation); | |
8198 | return 0; | |
8199 | } | |
8200 | } | |
8201 | ||
8202 | for (lo = rel_dyn->map_head.link_order; lo != NULL; lo = lo->next) | |
8203 | if (lo->type == bfd_indirect_link_order) | |
8204 | { | |
8205 | asection *o = lo->u.indirect.section; | |
8206 | ||
8207 | if ((o->size % bed->s->sizeof_rela) == 0) | |
8208 | { | |
8209 | if ((o->size % bed->s->sizeof_rel) == 0) | |
8210 | /* Section size is divisible by both rel and rela sizes. | |
8211 | It is of no help to us. */ | |
8212 | ; | |
8213 | else | |
8214 | { | |
8215 | /* Section size is only divisible by rela. */ | |
8216 | if (use_rela_initialised && (use_rela == FALSE)) | |
8217 | { | |
8218 | _bfd_error_handler | |
8219 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8220 | bfd_set_error (bfd_error_invalid_operation); | |
8221 | return 0; | |
8222 | } | |
8223 | else | |
8224 | { | |
8225 | use_rela = TRUE; | |
8226 | use_rela_initialised = TRUE; | |
8227 | } | |
8228 | } | |
8229 | } | |
8230 | else if ((o->size % bed->s->sizeof_rel) == 0) | |
8231 | { | |
8232 | /* Section size is only divisible by rel. */ | |
8233 | if (use_rela_initialised && (use_rela == TRUE)) | |
8234 | { | |
8235 | _bfd_error_handler | |
8236 | (_("%B: Unable to sort relocs - they are in more than one size"), abfd); | |
8237 | bfd_set_error (bfd_error_invalid_operation); | |
8238 | return 0; | |
8239 | } | |
8240 | else | |
8241 | { | |
8242 | use_rela = FALSE; | |
8243 | use_rela_initialised = TRUE; | |
8244 | } | |
8245 | } | |
8246 | else | |
8247 | { | |
8248 | /* The section size is not divisible by either - something is wrong. */ | |
8249 | _bfd_error_handler | |
8250 | (_("%B: Unable to sort relocs - they are of an unknown size"), abfd); | |
8251 | bfd_set_error (bfd_error_invalid_operation); | |
8252 | return 0; | |
8253 | } | |
8254 | } | |
8255 | ||
8256 | if (! use_rela_initialised) | |
8257 | /* Make a guess. */ | |
8258 | use_rela = TRUE; | |
c152c796 | 8259 | } |
fc66a176 L |
8260 | else if (rela_dyn != NULL && rela_dyn->size > 0) |
8261 | use_rela = TRUE; | |
8262 | else if (rel_dyn != NULL && rel_dyn->size > 0) | |
3410fea8 | 8263 | use_rela = FALSE; |
c152c796 | 8264 | else |
fc66a176 | 8265 | return 0; |
3410fea8 NC |
8266 | |
8267 | if (use_rela) | |
c152c796 | 8268 | { |
3410fea8 | 8269 | dynamic_relocs = rela_dyn; |
c152c796 AM |
8270 | ext_size = bed->s->sizeof_rela; |
8271 | swap_in = bed->s->swap_reloca_in; | |
8272 | swap_out = bed->s->swap_reloca_out; | |
8273 | } | |
3410fea8 NC |
8274 | else |
8275 | { | |
8276 | dynamic_relocs = rel_dyn; | |
8277 | ext_size = bed->s->sizeof_rel; | |
8278 | swap_in = bed->s->swap_reloc_in; | |
8279 | swap_out = bed->s->swap_reloc_out; | |
8280 | } | |
c152c796 AM |
8281 | |
8282 | size = 0; | |
3410fea8 | 8283 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 | 8284 | if (lo->type == bfd_indirect_link_order) |
3410fea8 | 8285 | size += lo->u.indirect.section->size; |
c152c796 | 8286 | |
3410fea8 | 8287 | if (size != dynamic_relocs->size) |
c152c796 AM |
8288 | return 0; |
8289 | ||
8290 | sort_elt = (sizeof (struct elf_link_sort_rela) | |
8291 | + (i2e - 1) * sizeof (Elf_Internal_Rela)); | |
3410fea8 NC |
8292 | |
8293 | count = dynamic_relocs->size / ext_size; | |
5e486aa1 NC |
8294 | if (count == 0) |
8295 | return 0; | |
a50b1753 | 8296 | sort = (bfd_byte *) bfd_zmalloc (sort_elt * count); |
3410fea8 | 8297 | |
c152c796 AM |
8298 | if (sort == NULL) |
8299 | { | |
8300 | (*info->callbacks->warning) | |
8301 | (info, _("Not enough memory to sort relocations"), 0, abfd, 0, 0); | |
8302 | return 0; | |
8303 | } | |
8304 | ||
8305 | if (bed->s->arch_size == 32) | |
8306 | r_sym_mask = ~(bfd_vma) 0xff; | |
8307 | else | |
8308 | r_sym_mask = ~(bfd_vma) 0xffffffff; | |
8309 | ||
3410fea8 | 8310 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8311 | if (lo->type == bfd_indirect_link_order) |
8312 | { | |
8313 | bfd_byte *erel, *erelend; | |
8314 | asection *o = lo->u.indirect.section; | |
8315 | ||
1da212d6 AM |
8316 | if (o->contents == NULL && o->size != 0) |
8317 | { | |
8318 | /* This is a reloc section that is being handled as a normal | |
8319 | section. See bfd_section_from_shdr. We can't combine | |
8320 | relocs in this case. */ | |
8321 | free (sort); | |
8322 | return 0; | |
8323 | } | |
c152c796 | 8324 | erel = o->contents; |
eea6121a | 8325 | erelend = o->contents + o->size; |
5dabe785 | 8326 | /* FIXME: octets_per_byte. */ |
c152c796 | 8327 | p = sort + o->output_offset / ext_size * sort_elt; |
3410fea8 | 8328 | |
c152c796 AM |
8329 | while (erel < erelend) |
8330 | { | |
8331 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
3410fea8 | 8332 | |
c152c796 | 8333 | (*swap_in) (abfd, erel, s->rela); |
7e612e98 | 8334 | s->type = (*bed->elf_backend_reloc_type_class) (info, o, s->rela); |
c152c796 AM |
8335 | s->u.sym_mask = r_sym_mask; |
8336 | p += sort_elt; | |
8337 | erel += ext_size; | |
8338 | } | |
8339 | } | |
8340 | ||
8341 | qsort (sort, count, sort_elt, elf_link_sort_cmp1); | |
8342 | ||
8343 | for (i = 0, p = sort; i < count; i++, p += sort_elt) | |
8344 | { | |
8345 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8346 | if (s->type != reloc_class_relative) | |
8347 | break; | |
8348 | } | |
8349 | ret = i; | |
8350 | s_non_relative = p; | |
8351 | ||
8352 | sq = (struct elf_link_sort_rela *) s_non_relative; | |
8353 | for (; i < count; i++, p += sort_elt) | |
8354 | { | |
8355 | struct elf_link_sort_rela *sp = (struct elf_link_sort_rela *) p; | |
8356 | if (((sp->rela->r_info ^ sq->rela->r_info) & r_sym_mask) != 0) | |
8357 | sq = sp; | |
8358 | sp->u.offset = sq->rela->r_offset; | |
8359 | } | |
8360 | ||
8361 | qsort (s_non_relative, count - ret, sort_elt, elf_link_sort_cmp2); | |
8362 | ||
3410fea8 | 8363 | for (lo = dynamic_relocs->map_head.link_order; lo != NULL; lo = lo->next) |
c152c796 AM |
8364 | if (lo->type == bfd_indirect_link_order) |
8365 | { | |
8366 | bfd_byte *erel, *erelend; | |
8367 | asection *o = lo->u.indirect.section; | |
8368 | ||
8369 | erel = o->contents; | |
eea6121a | 8370 | erelend = o->contents + o->size; |
5dabe785 | 8371 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
8372 | p = sort + o->output_offset / ext_size * sort_elt; |
8373 | while (erel < erelend) | |
8374 | { | |
8375 | struct elf_link_sort_rela *s = (struct elf_link_sort_rela *) p; | |
8376 | (*swap_out) (abfd, s->rela, erel); | |
8377 | p += sort_elt; | |
8378 | erel += ext_size; | |
8379 | } | |
8380 | } | |
8381 | ||
8382 | free (sort); | |
3410fea8 | 8383 | *psec = dynamic_relocs; |
c152c796 AM |
8384 | return ret; |
8385 | } | |
8386 | ||
8387 | /* Flush the output symbols to the file. */ | |
8388 | ||
8389 | static bfd_boolean | |
8b127cbc | 8390 | elf_link_flush_output_syms (struct elf_final_link_info *flinfo, |
c152c796 AM |
8391 | const struct elf_backend_data *bed) |
8392 | { | |
8b127cbc | 8393 | if (flinfo->symbuf_count > 0) |
c152c796 AM |
8394 | { |
8395 | Elf_Internal_Shdr *hdr; | |
8396 | file_ptr pos; | |
8397 | bfd_size_type amt; | |
8398 | ||
8b127cbc | 8399 | hdr = &elf_tdata (flinfo->output_bfd)->symtab_hdr; |
c152c796 | 8400 | pos = hdr->sh_offset + hdr->sh_size; |
8b127cbc AM |
8401 | amt = flinfo->symbuf_count * bed->s->sizeof_sym; |
8402 | if (bfd_seek (flinfo->output_bfd, pos, SEEK_SET) != 0 | |
8403 | || bfd_bwrite (flinfo->symbuf, amt, flinfo->output_bfd) != amt) | |
c152c796 AM |
8404 | return FALSE; |
8405 | ||
8406 | hdr->sh_size += amt; | |
8b127cbc | 8407 | flinfo->symbuf_count = 0; |
c152c796 AM |
8408 | } |
8409 | ||
8410 | return TRUE; | |
8411 | } | |
8412 | ||
8413 | /* Add a symbol to the output symbol table. */ | |
8414 | ||
6e0b88f1 | 8415 | static int |
8b127cbc | 8416 | elf_link_output_sym (struct elf_final_link_info *flinfo, |
c152c796 AM |
8417 | const char *name, |
8418 | Elf_Internal_Sym *elfsym, | |
8419 | asection *input_sec, | |
8420 | struct elf_link_hash_entry *h) | |
8421 | { | |
8422 | bfd_byte *dest; | |
8423 | Elf_External_Sym_Shndx *destshndx; | |
6e0b88f1 | 8424 | int (*output_symbol_hook) |
c152c796 AM |
8425 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, asection *, |
8426 | struct elf_link_hash_entry *); | |
8427 | const struct elf_backend_data *bed; | |
8428 | ||
8b127cbc | 8429 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 AM |
8430 | output_symbol_hook = bed->elf_backend_link_output_symbol_hook; |
8431 | if (output_symbol_hook != NULL) | |
8432 | { | |
8b127cbc | 8433 | int ret = (*output_symbol_hook) (flinfo->info, name, elfsym, input_sec, h); |
6e0b88f1 AM |
8434 | if (ret != 1) |
8435 | return ret; | |
c152c796 AM |
8436 | } |
8437 | ||
8438 | if (name == NULL || *name == '\0') | |
8439 | elfsym->st_name = 0; | |
8440 | else if (input_sec->flags & SEC_EXCLUDE) | |
8441 | elfsym->st_name = 0; | |
8442 | else | |
8443 | { | |
8b127cbc | 8444 | elfsym->st_name = (unsigned long) _bfd_stringtab_add (flinfo->symstrtab, |
c152c796 AM |
8445 | name, TRUE, FALSE); |
8446 | if (elfsym->st_name == (unsigned long) -1) | |
6e0b88f1 | 8447 | return 0; |
c152c796 AM |
8448 | } |
8449 | ||
8b127cbc | 8450 | if (flinfo->symbuf_count >= flinfo->symbuf_size) |
c152c796 | 8451 | { |
8b127cbc | 8452 | if (! elf_link_flush_output_syms (flinfo, bed)) |
6e0b88f1 | 8453 | return 0; |
c152c796 AM |
8454 | } |
8455 | ||
8b127cbc AM |
8456 | dest = flinfo->symbuf + flinfo->symbuf_count * bed->s->sizeof_sym; |
8457 | destshndx = flinfo->symshndxbuf; | |
c152c796 AM |
8458 | if (destshndx != NULL) |
8459 | { | |
8b127cbc | 8460 | if (bfd_get_symcount (flinfo->output_bfd) >= flinfo->shndxbuf_size) |
c152c796 AM |
8461 | { |
8462 | bfd_size_type amt; | |
8463 | ||
8b127cbc | 8464 | amt = flinfo->shndxbuf_size * sizeof (Elf_External_Sym_Shndx); |
a50b1753 NC |
8465 | destshndx = (Elf_External_Sym_Shndx *) bfd_realloc (destshndx, |
8466 | amt * 2); | |
c152c796 | 8467 | if (destshndx == NULL) |
6e0b88f1 | 8468 | return 0; |
8b127cbc | 8469 | flinfo->symshndxbuf = destshndx; |
c152c796 | 8470 | memset ((char *) destshndx + amt, 0, amt); |
8b127cbc | 8471 | flinfo->shndxbuf_size *= 2; |
c152c796 | 8472 | } |
8b127cbc | 8473 | destshndx += bfd_get_symcount (flinfo->output_bfd); |
c152c796 AM |
8474 | } |
8475 | ||
8b127cbc AM |
8476 | bed->s->swap_symbol_out (flinfo->output_bfd, elfsym, dest, destshndx); |
8477 | flinfo->symbuf_count += 1; | |
8478 | bfd_get_symcount (flinfo->output_bfd) += 1; | |
c152c796 | 8479 | |
6e0b88f1 | 8480 | return 1; |
c152c796 AM |
8481 | } |
8482 | ||
c0d5a53d L |
8483 | /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */ |
8484 | ||
8485 | static bfd_boolean | |
8486 | check_dynsym (bfd *abfd, Elf_Internal_Sym *sym) | |
8487 | { | |
4fbb74a6 AM |
8488 | if (sym->st_shndx >= (SHN_LORESERVE & 0xffff) |
8489 | && sym->st_shndx < SHN_LORESERVE) | |
c0d5a53d L |
8490 | { |
8491 | /* The gABI doesn't support dynamic symbols in output sections | |
a0c8462f | 8492 | beyond 64k. */ |
c0d5a53d L |
8493 | (*_bfd_error_handler) |
8494 | (_("%B: Too many sections: %d (>= %d)"), | |
4fbb74a6 | 8495 | abfd, bfd_count_sections (abfd), SHN_LORESERVE & 0xffff); |
c0d5a53d L |
8496 | bfd_set_error (bfd_error_nonrepresentable_section); |
8497 | return FALSE; | |
8498 | } | |
8499 | return TRUE; | |
8500 | } | |
8501 | ||
c152c796 AM |
8502 | /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in |
8503 | allowing an unsatisfied unversioned symbol in the DSO to match a | |
8504 | versioned symbol that would normally require an explicit version. | |
8505 | We also handle the case that a DSO references a hidden symbol | |
8506 | which may be satisfied by a versioned symbol in another DSO. */ | |
8507 | ||
8508 | static bfd_boolean | |
8509 | elf_link_check_versioned_symbol (struct bfd_link_info *info, | |
8510 | const struct elf_backend_data *bed, | |
8511 | struct elf_link_hash_entry *h) | |
8512 | { | |
8513 | bfd *abfd; | |
8514 | struct elf_link_loaded_list *loaded; | |
8515 | ||
8516 | if (!is_elf_hash_table (info->hash)) | |
8517 | return FALSE; | |
8518 | ||
90c984fc L |
8519 | /* Check indirect symbol. */ |
8520 | while (h->root.type == bfd_link_hash_indirect) | |
8521 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8522 | ||
c152c796 AM |
8523 | switch (h->root.type) |
8524 | { | |
8525 | default: | |
8526 | abfd = NULL; | |
8527 | break; | |
8528 | ||
8529 | case bfd_link_hash_undefined: | |
8530 | case bfd_link_hash_undefweak: | |
8531 | abfd = h->root.u.undef.abfd; | |
8532 | if ((abfd->flags & DYNAMIC) == 0 | |
e56f61be | 8533 | || (elf_dyn_lib_class (abfd) & DYN_DT_NEEDED) == 0) |
c152c796 AM |
8534 | return FALSE; |
8535 | break; | |
8536 | ||
8537 | case bfd_link_hash_defined: | |
8538 | case bfd_link_hash_defweak: | |
8539 | abfd = h->root.u.def.section->owner; | |
8540 | break; | |
8541 | ||
8542 | case bfd_link_hash_common: | |
8543 | abfd = h->root.u.c.p->section->owner; | |
8544 | break; | |
8545 | } | |
8546 | BFD_ASSERT (abfd != NULL); | |
8547 | ||
8548 | for (loaded = elf_hash_table (info)->loaded; | |
8549 | loaded != NULL; | |
8550 | loaded = loaded->next) | |
8551 | { | |
8552 | bfd *input; | |
8553 | Elf_Internal_Shdr *hdr; | |
8554 | bfd_size_type symcount; | |
8555 | bfd_size_type extsymcount; | |
8556 | bfd_size_type extsymoff; | |
8557 | Elf_Internal_Shdr *versymhdr; | |
8558 | Elf_Internal_Sym *isym; | |
8559 | Elf_Internal_Sym *isymend; | |
8560 | Elf_Internal_Sym *isymbuf; | |
8561 | Elf_External_Versym *ever; | |
8562 | Elf_External_Versym *extversym; | |
8563 | ||
8564 | input = loaded->abfd; | |
8565 | ||
8566 | /* We check each DSO for a possible hidden versioned definition. */ | |
8567 | if (input == abfd | |
8568 | || (input->flags & DYNAMIC) == 0 | |
8569 | || elf_dynversym (input) == 0) | |
8570 | continue; | |
8571 | ||
8572 | hdr = &elf_tdata (input)->dynsymtab_hdr; | |
8573 | ||
8574 | symcount = hdr->sh_size / bed->s->sizeof_sym; | |
8575 | if (elf_bad_symtab (input)) | |
8576 | { | |
8577 | extsymcount = symcount; | |
8578 | extsymoff = 0; | |
8579 | } | |
8580 | else | |
8581 | { | |
8582 | extsymcount = symcount - hdr->sh_info; | |
8583 | extsymoff = hdr->sh_info; | |
8584 | } | |
8585 | ||
8586 | if (extsymcount == 0) | |
8587 | continue; | |
8588 | ||
8589 | isymbuf = bfd_elf_get_elf_syms (input, hdr, extsymcount, extsymoff, | |
8590 | NULL, NULL, NULL); | |
8591 | if (isymbuf == NULL) | |
8592 | return FALSE; | |
8593 | ||
8594 | /* Read in any version definitions. */ | |
8595 | versymhdr = &elf_tdata (input)->dynversym_hdr; | |
a50b1753 | 8596 | extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size); |
c152c796 AM |
8597 | if (extversym == NULL) |
8598 | goto error_ret; | |
8599 | ||
8600 | if (bfd_seek (input, versymhdr->sh_offset, SEEK_SET) != 0 | |
8601 | || (bfd_bread (extversym, versymhdr->sh_size, input) | |
8602 | != versymhdr->sh_size)) | |
8603 | { | |
8604 | free (extversym); | |
8605 | error_ret: | |
8606 | free (isymbuf); | |
8607 | return FALSE; | |
8608 | } | |
8609 | ||
8610 | ever = extversym + extsymoff; | |
8611 | isymend = isymbuf + extsymcount; | |
8612 | for (isym = isymbuf; isym < isymend; isym++, ever++) | |
8613 | { | |
8614 | const char *name; | |
8615 | Elf_Internal_Versym iver; | |
8616 | unsigned short version_index; | |
8617 | ||
8618 | if (ELF_ST_BIND (isym->st_info) == STB_LOCAL | |
8619 | || isym->st_shndx == SHN_UNDEF) | |
8620 | continue; | |
8621 | ||
8622 | name = bfd_elf_string_from_elf_section (input, | |
8623 | hdr->sh_link, | |
8624 | isym->st_name); | |
8625 | if (strcmp (name, h->root.root.string) != 0) | |
8626 | continue; | |
8627 | ||
8628 | _bfd_elf_swap_versym_in (input, ever, &iver); | |
8629 | ||
d023c380 L |
8630 | if ((iver.vs_vers & VERSYM_HIDDEN) == 0 |
8631 | && !(h->def_regular | |
8632 | && h->forced_local)) | |
c152c796 AM |
8633 | { |
8634 | /* If we have a non-hidden versioned sym, then it should | |
d023c380 L |
8635 | have provided a definition for the undefined sym unless |
8636 | it is defined in a non-shared object and forced local. | |
8637 | */ | |
c152c796 AM |
8638 | abort (); |
8639 | } | |
8640 | ||
8641 | version_index = iver.vs_vers & VERSYM_VERSION; | |
8642 | if (version_index == 1 || version_index == 2) | |
8643 | { | |
8644 | /* This is the base or first version. We can use it. */ | |
8645 | free (extversym); | |
8646 | free (isymbuf); | |
8647 | return TRUE; | |
8648 | } | |
8649 | } | |
8650 | ||
8651 | free (extversym); | |
8652 | free (isymbuf); | |
8653 | } | |
8654 | ||
8655 | return FALSE; | |
8656 | } | |
8657 | ||
8658 | /* Add an external symbol to the symbol table. This is called from | |
8659 | the hash table traversal routine. When generating a shared object, | |
8660 | we go through the symbol table twice. The first time we output | |
8661 | anything that might have been forced to local scope in a version | |
8662 | script. The second time we output the symbols that are still | |
8663 | global symbols. */ | |
8664 | ||
8665 | static bfd_boolean | |
7686d77d | 8666 | elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) |
c152c796 | 8667 | { |
7686d77d | 8668 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; |
a50b1753 | 8669 | struct elf_outext_info *eoinfo = (struct elf_outext_info *) data; |
8b127cbc | 8670 | struct elf_final_link_info *flinfo = eoinfo->flinfo; |
c152c796 AM |
8671 | bfd_boolean strip; |
8672 | Elf_Internal_Sym sym; | |
8673 | asection *input_sec; | |
8674 | const struct elf_backend_data *bed; | |
6e0b88f1 AM |
8675 | long indx; |
8676 | int ret; | |
c152c796 AM |
8677 | |
8678 | if (h->root.type == bfd_link_hash_warning) | |
8679 | { | |
8680 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
8681 | if (h->root.type == bfd_link_hash_new) | |
8682 | return TRUE; | |
8683 | } | |
8684 | ||
8685 | /* Decide whether to output this symbol in this pass. */ | |
8686 | if (eoinfo->localsyms) | |
8687 | { | |
f5385ebf | 8688 | if (!h->forced_local) |
c152c796 | 8689 | return TRUE; |
ffbc01cc AM |
8690 | if (eoinfo->second_pass |
8691 | && !((h->root.type == bfd_link_hash_defined | |
8692 | || h->root.type == bfd_link_hash_defweak) | |
8693 | && h->root.u.def.section->output_section != NULL)) | |
8694 | return TRUE; | |
34a79995 JB |
8695 | |
8696 | if (!eoinfo->file_sym_done | |
8697 | && (eoinfo->second_pass ? eoinfo->flinfo->filesym_count == 1 | |
8698 | : eoinfo->flinfo->filesym_count > 1)) | |
8699 | { | |
8700 | /* Output a FILE symbol so that following locals are not associated | |
8701 | with the wrong input file. */ | |
8702 | memset (&sym, 0, sizeof (sym)); | |
8703 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
8704 | sym.st_shndx = SHN_ABS; | |
8705 | if (!elf_link_output_sym (eoinfo->flinfo, NULL, &sym, | |
8706 | bfd_und_section_ptr, NULL)) | |
8707 | return FALSE; | |
8708 | ||
8709 | eoinfo->file_sym_done = TRUE; | |
8710 | } | |
c152c796 AM |
8711 | } |
8712 | else | |
8713 | { | |
f5385ebf | 8714 | if (h->forced_local) |
c152c796 AM |
8715 | return TRUE; |
8716 | } | |
8717 | ||
8b127cbc | 8718 | bed = get_elf_backend_data (flinfo->output_bfd); |
c152c796 | 8719 | |
12ac1cf5 | 8720 | if (h->root.type == bfd_link_hash_undefined) |
c152c796 | 8721 | { |
12ac1cf5 NC |
8722 | /* If we have an undefined symbol reference here then it must have |
8723 | come from a shared library that is being linked in. (Undefined | |
98da7939 L |
8724 | references in regular files have already been handled unless |
8725 | they are in unreferenced sections which are removed by garbage | |
8726 | collection). */ | |
12ac1cf5 NC |
8727 | bfd_boolean ignore_undef = FALSE; |
8728 | ||
8729 | /* Some symbols may be special in that the fact that they're | |
8730 | undefined can be safely ignored - let backend determine that. */ | |
8731 | if (bed->elf_backend_ignore_undef_symbol) | |
8732 | ignore_undef = bed->elf_backend_ignore_undef_symbol (h); | |
8733 | ||
8734 | /* If we are reporting errors for this situation then do so now. */ | |
89a2ee5a | 8735 | if (!ignore_undef |
12ac1cf5 | 8736 | && h->ref_dynamic |
8b127cbc AM |
8737 | && (!h->ref_regular || flinfo->info->gc_sections) |
8738 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h) | |
8739 | && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) | |
8740 | { | |
8741 | if (!(flinfo->info->callbacks->undefined_symbol | |
8742 | (flinfo->info, h->root.root.string, | |
8743 | h->ref_regular ? NULL : h->root.u.undef.abfd, | |
8744 | NULL, 0, | |
8745 | (flinfo->info->unresolved_syms_in_shared_libs | |
8746 | == RM_GENERATE_ERROR)))) | |
12ac1cf5 | 8747 | { |
17d078c5 | 8748 | bfd_set_error (bfd_error_bad_value); |
12ac1cf5 NC |
8749 | eoinfo->failed = TRUE; |
8750 | return FALSE; | |
8751 | } | |
c152c796 AM |
8752 | } |
8753 | } | |
8754 | ||
8755 | /* We should also warn if a forced local symbol is referenced from | |
8756 | shared libraries. */ | |
8b127cbc AM |
8757 | if (!flinfo->info->relocatable |
8758 | && flinfo->info->executable | |
f5385ebf AM |
8759 | && h->forced_local |
8760 | && h->ref_dynamic | |
371a5866 | 8761 | && h->def_regular |
f5385ebf | 8762 | && !h->dynamic_def |
ee659f1f | 8763 | && h->ref_dynamic_nonweak |
8b127cbc | 8764 | && !elf_link_check_versioned_symbol (flinfo->info, bed, h)) |
c152c796 | 8765 | { |
17d078c5 AM |
8766 | bfd *def_bfd; |
8767 | const char *msg; | |
90c984fc L |
8768 | struct elf_link_hash_entry *hi = h; |
8769 | ||
8770 | /* Check indirect symbol. */ | |
8771 | while (hi->root.type == bfd_link_hash_indirect) | |
8772 | hi = (struct elf_link_hash_entry *) hi->root.u.i.link; | |
17d078c5 AM |
8773 | |
8774 | if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL) | |
8775 | msg = _("%B: internal symbol `%s' in %B is referenced by DSO"); | |
8776 | else if (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN) | |
8777 | msg = _("%B: hidden symbol `%s' in %B is referenced by DSO"); | |
8778 | else | |
8779 | msg = _("%B: local symbol `%s' in %B is referenced by DSO"); | |
8b127cbc | 8780 | def_bfd = flinfo->output_bfd; |
90c984fc L |
8781 | if (hi->root.u.def.section != bfd_abs_section_ptr) |
8782 | def_bfd = hi->root.u.def.section->owner; | |
8b127cbc | 8783 | (*_bfd_error_handler) (msg, flinfo->output_bfd, def_bfd, |
17d078c5 AM |
8784 | h->root.root.string); |
8785 | bfd_set_error (bfd_error_bad_value); | |
c152c796 AM |
8786 | eoinfo->failed = TRUE; |
8787 | return FALSE; | |
8788 | } | |
8789 | ||
8790 | /* We don't want to output symbols that have never been mentioned by | |
8791 | a regular file, or that we have been told to strip. However, if | |
8792 | h->indx is set to -2, the symbol is used by a reloc and we must | |
8793 | output it. */ | |
8794 | if (h->indx == -2) | |
8795 | strip = FALSE; | |
f5385ebf | 8796 | else if ((h->def_dynamic |
77cfaee6 AM |
8797 | || h->ref_dynamic |
8798 | || h->root.type == bfd_link_hash_new) | |
f5385ebf AM |
8799 | && !h->def_regular |
8800 | && !h->ref_regular) | |
c152c796 | 8801 | strip = TRUE; |
8b127cbc | 8802 | else if (flinfo->info->strip == strip_all) |
c152c796 | 8803 | strip = TRUE; |
8b127cbc AM |
8804 | else if (flinfo->info->strip == strip_some |
8805 | && bfd_hash_lookup (flinfo->info->keep_hash, | |
c152c796 AM |
8806 | h->root.root.string, FALSE, FALSE) == NULL) |
8807 | strip = TRUE; | |
d56d55e7 AM |
8808 | else if ((h->root.type == bfd_link_hash_defined |
8809 | || h->root.type == bfd_link_hash_defweak) | |
8b127cbc | 8810 | && ((flinfo->info->strip_discarded |
dbaa2011 | 8811 | && discarded_section (h->root.u.def.section)) |
d56d55e7 AM |
8812 | || (h->root.u.def.section->owner != NULL |
8813 | && (h->root.u.def.section->owner->flags & BFD_PLUGIN) != 0))) | |
c152c796 | 8814 | strip = TRUE; |
9e2278f5 AM |
8815 | else if ((h->root.type == bfd_link_hash_undefined |
8816 | || h->root.type == bfd_link_hash_undefweak) | |
8817 | && h->root.u.undef.abfd != NULL | |
8818 | && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0) | |
8819 | strip = TRUE; | |
c152c796 AM |
8820 | else |
8821 | strip = FALSE; | |
8822 | ||
8823 | /* If we're stripping it, and it's not a dynamic symbol, there's | |
57ca8ac7 L |
8824 | nothing else to do unless it is a forced local symbol or a |
8825 | STT_GNU_IFUNC symbol. */ | |
c152c796 AM |
8826 | if (strip |
8827 | && h->dynindx == -1 | |
57ca8ac7 | 8828 | && h->type != STT_GNU_IFUNC |
f5385ebf | 8829 | && !h->forced_local) |
c152c796 AM |
8830 | return TRUE; |
8831 | ||
8832 | sym.st_value = 0; | |
8833 | sym.st_size = h->size; | |
8834 | sym.st_other = h->other; | |
f5385ebf | 8835 | if (h->forced_local) |
935bd1e0 L |
8836 | { |
8837 | sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type); | |
8838 | /* Turn off visibility on local symbol. */ | |
8839 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); | |
8840 | } | |
02acbe22 L |
8841 | /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */ |
8842 | else if (h->unique_global && h->def_regular) | |
3e7a7d11 | 8843 | sym.st_info = ELF_ST_INFO (STB_GNU_UNIQUE, h->type); |
c152c796 AM |
8844 | else if (h->root.type == bfd_link_hash_undefweak |
8845 | || h->root.type == bfd_link_hash_defweak) | |
8846 | sym.st_info = ELF_ST_INFO (STB_WEAK, h->type); | |
8847 | else | |
8848 | sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type); | |
35fc36a8 | 8849 | sym.st_target_internal = h->target_internal; |
c152c796 AM |
8850 | |
8851 | switch (h->root.type) | |
8852 | { | |
8853 | default: | |
8854 | case bfd_link_hash_new: | |
8855 | case bfd_link_hash_warning: | |
8856 | abort (); | |
8857 | return FALSE; | |
8858 | ||
8859 | case bfd_link_hash_undefined: | |
8860 | case bfd_link_hash_undefweak: | |
8861 | input_sec = bfd_und_section_ptr; | |
8862 | sym.st_shndx = SHN_UNDEF; | |
8863 | break; | |
8864 | ||
8865 | case bfd_link_hash_defined: | |
8866 | case bfd_link_hash_defweak: | |
8867 | { | |
8868 | input_sec = h->root.u.def.section; | |
8869 | if (input_sec->output_section != NULL) | |
8870 | { | |
ffbc01cc AM |
8871 | if (eoinfo->localsyms && flinfo->filesym_count == 1) |
8872 | { | |
8873 | bfd_boolean second_pass_sym | |
8874 | = (input_sec->owner == flinfo->output_bfd | |
8875 | || input_sec->owner == NULL | |
8876 | || (input_sec->flags & SEC_LINKER_CREATED) != 0 | |
8877 | || (input_sec->owner->flags & BFD_LINKER_CREATED) != 0); | |
8878 | ||
8879 | eoinfo->need_second_pass |= second_pass_sym; | |
8880 | if (eoinfo->second_pass != second_pass_sym) | |
8881 | return TRUE; | |
8882 | } | |
8883 | ||
c152c796 | 8884 | sym.st_shndx = |
8b127cbc | 8885 | _bfd_elf_section_from_bfd_section (flinfo->output_bfd, |
c152c796 AM |
8886 | input_sec->output_section); |
8887 | if (sym.st_shndx == SHN_BAD) | |
8888 | { | |
8889 | (*_bfd_error_handler) | |
d003868e | 8890 | (_("%B: could not find output section %A for input section %A"), |
8b127cbc | 8891 | flinfo->output_bfd, input_sec->output_section, input_sec); |
17d078c5 | 8892 | bfd_set_error (bfd_error_nonrepresentable_section); |
c152c796 AM |
8893 | eoinfo->failed = TRUE; |
8894 | return FALSE; | |
8895 | } | |
8896 | ||
8897 | /* ELF symbols in relocatable files are section relative, | |
8898 | but in nonrelocatable files they are virtual | |
8899 | addresses. */ | |
8900 | sym.st_value = h->root.u.def.value + input_sec->output_offset; | |
8b127cbc | 8901 | if (!flinfo->info->relocatable) |
c152c796 AM |
8902 | { |
8903 | sym.st_value += input_sec->output_section->vma; | |
8904 | if (h->type == STT_TLS) | |
8905 | { | |
8b127cbc | 8906 | asection *tls_sec = elf_hash_table (flinfo->info)->tls_sec; |
430a16a5 NC |
8907 | if (tls_sec != NULL) |
8908 | sym.st_value -= tls_sec->vma; | |
8909 | else | |
8910 | { | |
8911 | /* The TLS section may have been garbage collected. */ | |
8b127cbc | 8912 | BFD_ASSERT (flinfo->info->gc_sections |
430a16a5 NC |
8913 | && !input_sec->gc_mark); |
8914 | } | |
c152c796 AM |
8915 | } |
8916 | } | |
8917 | } | |
8918 | else | |
8919 | { | |
8920 | BFD_ASSERT (input_sec->owner == NULL | |
8921 | || (input_sec->owner->flags & DYNAMIC) != 0); | |
8922 | sym.st_shndx = SHN_UNDEF; | |
8923 | input_sec = bfd_und_section_ptr; | |
8924 | } | |
8925 | } | |
8926 | break; | |
8927 | ||
8928 | case bfd_link_hash_common: | |
8929 | input_sec = h->root.u.c.p->section; | |
a4d8e49b | 8930 | sym.st_shndx = bed->common_section_index (input_sec); |
c152c796 AM |
8931 | sym.st_value = 1 << h->root.u.c.p->alignment_power; |
8932 | break; | |
8933 | ||
8934 | case bfd_link_hash_indirect: | |
8935 | /* These symbols are created by symbol versioning. They point | |
8936 | to the decorated version of the name. For example, if the | |
8937 | symbol foo@@GNU_1.2 is the default, which should be used when | |
8938 | foo is used with no version, then we add an indirect symbol | |
8939 | foo which points to foo@@GNU_1.2. We ignore these symbols, | |
8940 | since the indirected symbol is already in the hash table. */ | |
8941 | return TRUE; | |
8942 | } | |
8943 | ||
8944 | /* Give the processor backend a chance to tweak the symbol value, | |
8945 | and also to finish up anything that needs to be done for this | |
8946 | symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for | |
3aa14d16 | 8947 | forced local syms when non-shared is due to a historical quirk. |
5f35ea9c | 8948 | STT_GNU_IFUNC symbol must go through PLT. */ |
3aa14d16 | 8949 | if ((h->type == STT_GNU_IFUNC |
5f35ea9c | 8950 | && h->def_regular |
8b127cbc | 8951 | && !flinfo->info->relocatable) |
3aa14d16 L |
8952 | || ((h->dynindx != -1 |
8953 | || h->forced_local) | |
8b127cbc | 8954 | && ((flinfo->info->shared |
3aa14d16 L |
8955 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
8956 | || h->root.type != bfd_link_hash_undefweak)) | |
8957 | || !h->forced_local) | |
8b127cbc | 8958 | && elf_hash_table (flinfo->info)->dynamic_sections_created)) |
c152c796 AM |
8959 | { |
8960 | if (! ((*bed->elf_backend_finish_dynamic_symbol) | |
8b127cbc | 8961 | (flinfo->output_bfd, flinfo->info, h, &sym))) |
c152c796 AM |
8962 | { |
8963 | eoinfo->failed = TRUE; | |
8964 | return FALSE; | |
8965 | } | |
8966 | } | |
8967 | ||
8968 | /* If we are marking the symbol as undefined, and there are no | |
8969 | non-weak references to this symbol from a regular object, then | |
8970 | mark the symbol as weak undefined; if there are non-weak | |
8971 | references, mark the symbol as strong. We can't do this earlier, | |
8972 | because it might not be marked as undefined until the | |
8973 | finish_dynamic_symbol routine gets through with it. */ | |
8974 | if (sym.st_shndx == SHN_UNDEF | |
f5385ebf | 8975 | && h->ref_regular |
c152c796 AM |
8976 | && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL |
8977 | || ELF_ST_BIND (sym.st_info) == STB_WEAK)) | |
8978 | { | |
8979 | int bindtype; | |
2955ec4c L |
8980 | unsigned int type = ELF_ST_TYPE (sym.st_info); |
8981 | ||
8982 | /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */ | |
8983 | if (type == STT_GNU_IFUNC) | |
8984 | type = STT_FUNC; | |
c152c796 | 8985 | |
f5385ebf | 8986 | if (h->ref_regular_nonweak) |
c152c796 AM |
8987 | bindtype = STB_GLOBAL; |
8988 | else | |
8989 | bindtype = STB_WEAK; | |
2955ec4c | 8990 | sym.st_info = ELF_ST_INFO (bindtype, type); |
c152c796 AM |
8991 | } |
8992 | ||
bda987c2 CD |
8993 | /* If this is a symbol defined in a dynamic library, don't use the |
8994 | symbol size from the dynamic library. Relinking an executable | |
8995 | against a new library may introduce gratuitous changes in the | |
8996 | executable's symbols if we keep the size. */ | |
8997 | if (sym.st_shndx == SHN_UNDEF | |
8998 | && !h->def_regular | |
8999 | && h->def_dynamic) | |
9000 | sym.st_size = 0; | |
9001 | ||
c152c796 AM |
9002 | /* If a non-weak symbol with non-default visibility is not defined |
9003 | locally, it is a fatal error. */ | |
8b127cbc | 9004 | if (!flinfo->info->relocatable |
c152c796 AM |
9005 | && ELF_ST_VISIBILITY (sym.st_other) != STV_DEFAULT |
9006 | && ELF_ST_BIND (sym.st_info) != STB_WEAK | |
9007 | && h->root.type == bfd_link_hash_undefined | |
f5385ebf | 9008 | && !h->def_regular) |
c152c796 | 9009 | { |
17d078c5 AM |
9010 | const char *msg; |
9011 | ||
9012 | if (ELF_ST_VISIBILITY (sym.st_other) == STV_PROTECTED) | |
9013 | msg = _("%B: protected symbol `%s' isn't defined"); | |
9014 | else if (ELF_ST_VISIBILITY (sym.st_other) == STV_INTERNAL) | |
9015 | msg = _("%B: internal symbol `%s' isn't defined"); | |
9016 | else | |
9017 | msg = _("%B: hidden symbol `%s' isn't defined"); | |
8b127cbc | 9018 | (*_bfd_error_handler) (msg, flinfo->output_bfd, h->root.root.string); |
17d078c5 | 9019 | bfd_set_error (bfd_error_bad_value); |
c152c796 AM |
9020 | eoinfo->failed = TRUE; |
9021 | return FALSE; | |
9022 | } | |
9023 | ||
9024 | /* If this symbol should be put in the .dynsym section, then put it | |
9025 | there now. We already know the symbol index. We also fill in | |
9026 | the entry in the .hash section. */ | |
8b127cbc | 9027 | if (flinfo->dynsym_sec != NULL |
202e2356 | 9028 | && h->dynindx != -1 |
8b127cbc | 9029 | && elf_hash_table (flinfo->info)->dynamic_sections_created) |
c152c796 | 9030 | { |
c152c796 AM |
9031 | bfd_byte *esym; |
9032 | ||
90c984fc L |
9033 | /* Since there is no version information in the dynamic string, |
9034 | if there is no version info in symbol version section, we will | |
9035 | have a run-time problem. */ | |
9036 | if (h->verinfo.verdef == NULL) | |
9037 | { | |
9038 | char *p = strrchr (h->root.root.string, ELF_VER_CHR); | |
9039 | ||
9040 | if (p && p [1] != '\0') | |
9041 | { | |
9042 | (*_bfd_error_handler) | |
9043 | (_("%B: No symbol version section for versioned symbol `%s'"), | |
9044 | flinfo->output_bfd, h->root.root.string); | |
9045 | eoinfo->failed = TRUE; | |
9046 | return FALSE; | |
9047 | } | |
9048 | } | |
9049 | ||
c152c796 | 9050 | sym.st_name = h->dynstr_index; |
8b127cbc AM |
9051 | esym = flinfo->dynsym_sec->contents + h->dynindx * bed->s->sizeof_sym; |
9052 | if (!check_dynsym (flinfo->output_bfd, &sym)) | |
c0d5a53d L |
9053 | { |
9054 | eoinfo->failed = TRUE; | |
9055 | return FALSE; | |
9056 | } | |
8b127cbc | 9057 | bed->s->swap_symbol_out (flinfo->output_bfd, &sym, esym, 0); |
c152c796 | 9058 | |
8b127cbc | 9059 | if (flinfo->hash_sec != NULL) |
fdc90cb4 JJ |
9060 | { |
9061 | size_t hash_entry_size; | |
9062 | bfd_byte *bucketpos; | |
9063 | bfd_vma chain; | |
41198d0c L |
9064 | size_t bucketcount; |
9065 | size_t bucket; | |
9066 | ||
8b127cbc | 9067 | bucketcount = elf_hash_table (flinfo->info)->bucketcount; |
41198d0c | 9068 | bucket = h->u.elf_hash_value % bucketcount; |
fdc90cb4 JJ |
9069 | |
9070 | hash_entry_size | |
8b127cbc AM |
9071 | = elf_section_data (flinfo->hash_sec)->this_hdr.sh_entsize; |
9072 | bucketpos = ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 | 9073 | + (bucket + 2) * hash_entry_size); |
8b127cbc AM |
9074 | chain = bfd_get (8 * hash_entry_size, flinfo->output_bfd, bucketpos); |
9075 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, h->dynindx, | |
9076 | bucketpos); | |
9077 | bfd_put (8 * hash_entry_size, flinfo->output_bfd, chain, | |
9078 | ((bfd_byte *) flinfo->hash_sec->contents | |
fdc90cb4 JJ |
9079 | + (bucketcount + 2 + h->dynindx) * hash_entry_size)); |
9080 | } | |
c152c796 | 9081 | |
8b127cbc | 9082 | if (flinfo->symver_sec != NULL && flinfo->symver_sec->contents != NULL) |
c152c796 AM |
9083 | { |
9084 | Elf_Internal_Versym iversym; | |
9085 | Elf_External_Versym *eversym; | |
9086 | ||
f5385ebf | 9087 | if (!h->def_regular) |
c152c796 AM |
9088 | { |
9089 | if (h->verinfo.verdef == NULL) | |
9090 | iversym.vs_vers = 0; | |
9091 | else | |
9092 | iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1; | |
9093 | } | |
9094 | else | |
9095 | { | |
9096 | if (h->verinfo.vertree == NULL) | |
9097 | iversym.vs_vers = 1; | |
9098 | else | |
9099 | iversym.vs_vers = h->verinfo.vertree->vernum + 1; | |
8b127cbc | 9100 | if (flinfo->info->create_default_symver) |
3e3b46e5 | 9101 | iversym.vs_vers++; |
c152c796 AM |
9102 | } |
9103 | ||
f5385ebf | 9104 | if (h->hidden) |
c152c796 AM |
9105 | iversym.vs_vers |= VERSYM_HIDDEN; |
9106 | ||
8b127cbc | 9107 | eversym = (Elf_External_Versym *) flinfo->symver_sec->contents; |
c152c796 | 9108 | eversym += h->dynindx; |
8b127cbc | 9109 | _bfd_elf_swap_versym_out (flinfo->output_bfd, &iversym, eversym); |
c152c796 AM |
9110 | } |
9111 | } | |
9112 | ||
9113 | /* If we're stripping it, then it was just a dynamic symbol, and | |
9114 | there's nothing else to do. */ | |
9115 | if (strip || (input_sec->flags & SEC_EXCLUDE) != 0) | |
9116 | return TRUE; | |
9117 | ||
8b127cbc AM |
9118 | indx = bfd_get_symcount (flinfo->output_bfd); |
9119 | ret = elf_link_output_sym (flinfo, h->root.root.string, &sym, input_sec, h); | |
6e0b88f1 | 9120 | if (ret == 0) |
c152c796 AM |
9121 | { |
9122 | eoinfo->failed = TRUE; | |
9123 | return FALSE; | |
9124 | } | |
6e0b88f1 AM |
9125 | else if (ret == 1) |
9126 | h->indx = indx; | |
9127 | else if (h->indx == -2) | |
9128 | abort(); | |
c152c796 AM |
9129 | |
9130 | return TRUE; | |
9131 | } | |
9132 | ||
cdd3575c AM |
9133 | /* Return TRUE if special handling is done for relocs in SEC against |
9134 | symbols defined in discarded sections. */ | |
9135 | ||
c152c796 AM |
9136 | static bfd_boolean |
9137 | elf_section_ignore_discarded_relocs (asection *sec) | |
9138 | { | |
9139 | const struct elf_backend_data *bed; | |
9140 | ||
cdd3575c AM |
9141 | switch (sec->sec_info_type) |
9142 | { | |
dbaa2011 AM |
9143 | case SEC_INFO_TYPE_STABS: |
9144 | case SEC_INFO_TYPE_EH_FRAME: | |
cdd3575c AM |
9145 | return TRUE; |
9146 | default: | |
9147 | break; | |
9148 | } | |
c152c796 AM |
9149 | |
9150 | bed = get_elf_backend_data (sec->owner); | |
9151 | if (bed->elf_backend_ignore_discarded_relocs != NULL | |
9152 | && (*bed->elf_backend_ignore_discarded_relocs) (sec)) | |
9153 | return TRUE; | |
9154 | ||
9155 | return FALSE; | |
9156 | } | |
9157 | ||
9e66c942 AM |
9158 | /* Return a mask saying how ld should treat relocations in SEC against |
9159 | symbols defined in discarded sections. If this function returns | |
9160 | COMPLAIN set, ld will issue a warning message. If this function | |
9161 | returns PRETEND set, and the discarded section was link-once and the | |
9162 | same size as the kept link-once section, ld will pretend that the | |
9163 | symbol was actually defined in the kept section. Otherwise ld will | |
9164 | zero the reloc (at least that is the intent, but some cooperation by | |
9165 | the target dependent code is needed, particularly for REL targets). */ | |
9166 | ||
8a696751 AM |
9167 | unsigned int |
9168 | _bfd_elf_default_action_discarded (asection *sec) | |
cdd3575c | 9169 | { |
9e66c942 | 9170 | if (sec->flags & SEC_DEBUGGING) |
69d54b1b | 9171 | return PRETEND; |
cdd3575c AM |
9172 | |
9173 | if (strcmp (".eh_frame", sec->name) == 0) | |
9e66c942 | 9174 | return 0; |
cdd3575c AM |
9175 | |
9176 | if (strcmp (".gcc_except_table", sec->name) == 0) | |
9e66c942 | 9177 | return 0; |
cdd3575c | 9178 | |
9e66c942 | 9179 | return COMPLAIN | PRETEND; |
cdd3575c AM |
9180 | } |
9181 | ||
3d7f7666 L |
9182 | /* Find a match between a section and a member of a section group. */ |
9183 | ||
9184 | static asection * | |
c0f00686 L |
9185 | match_group_member (asection *sec, asection *group, |
9186 | struct bfd_link_info *info) | |
3d7f7666 L |
9187 | { |
9188 | asection *first = elf_next_in_group (group); | |
9189 | asection *s = first; | |
9190 | ||
9191 | while (s != NULL) | |
9192 | { | |
c0f00686 | 9193 | if (bfd_elf_match_symbols_in_sections (s, sec, info)) |
3d7f7666 L |
9194 | return s; |
9195 | ||
83180ade | 9196 | s = elf_next_in_group (s); |
3d7f7666 L |
9197 | if (s == first) |
9198 | break; | |
9199 | } | |
9200 | ||
9201 | return NULL; | |
9202 | } | |
9203 | ||
01b3c8ab | 9204 | /* Check if the kept section of a discarded section SEC can be used |
c2370991 AM |
9205 | to replace it. Return the replacement if it is OK. Otherwise return |
9206 | NULL. */ | |
01b3c8ab L |
9207 | |
9208 | asection * | |
c0f00686 | 9209 | _bfd_elf_check_kept_section (asection *sec, struct bfd_link_info *info) |
01b3c8ab L |
9210 | { |
9211 | asection *kept; | |
9212 | ||
9213 | kept = sec->kept_section; | |
9214 | if (kept != NULL) | |
9215 | { | |
c2370991 | 9216 | if ((kept->flags & SEC_GROUP) != 0) |
c0f00686 | 9217 | kept = match_group_member (sec, kept, info); |
1dd2625f BW |
9218 | if (kept != NULL |
9219 | && ((sec->rawsize != 0 ? sec->rawsize : sec->size) | |
9220 | != (kept->rawsize != 0 ? kept->rawsize : kept->size))) | |
01b3c8ab | 9221 | kept = NULL; |
c2370991 | 9222 | sec->kept_section = kept; |
01b3c8ab L |
9223 | } |
9224 | return kept; | |
9225 | } | |
9226 | ||
c152c796 AM |
9227 | /* Link an input file into the linker output file. This function |
9228 | handles all the sections and relocations of the input file at once. | |
9229 | This is so that we only have to read the local symbols once, and | |
9230 | don't have to keep them in memory. */ | |
9231 | ||
9232 | static bfd_boolean | |
8b127cbc | 9233 | elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd) |
c152c796 | 9234 | { |
ece5ef60 | 9235 | int (*relocate_section) |
c152c796 AM |
9236 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
9237 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); | |
9238 | bfd *output_bfd; | |
9239 | Elf_Internal_Shdr *symtab_hdr; | |
9240 | size_t locsymcount; | |
9241 | size_t extsymoff; | |
9242 | Elf_Internal_Sym *isymbuf; | |
9243 | Elf_Internal_Sym *isym; | |
9244 | Elf_Internal_Sym *isymend; | |
9245 | long *pindex; | |
9246 | asection **ppsection; | |
9247 | asection *o; | |
9248 | const struct elf_backend_data *bed; | |
c152c796 | 9249 | struct elf_link_hash_entry **sym_hashes; |
310fd250 L |
9250 | bfd_size_type address_size; |
9251 | bfd_vma r_type_mask; | |
9252 | int r_sym_shift; | |
ffbc01cc | 9253 | bfd_boolean have_file_sym = FALSE; |
c152c796 | 9254 | |
8b127cbc | 9255 | output_bfd = flinfo->output_bfd; |
c152c796 AM |
9256 | bed = get_elf_backend_data (output_bfd); |
9257 | relocate_section = bed->elf_backend_relocate_section; | |
9258 | ||
9259 | /* If this is a dynamic object, we don't want to do anything here: | |
9260 | we don't want the local symbols, and we don't want the section | |
9261 | contents. */ | |
9262 | if ((input_bfd->flags & DYNAMIC) != 0) | |
9263 | return TRUE; | |
9264 | ||
c152c796 AM |
9265 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
9266 | if (elf_bad_symtab (input_bfd)) | |
9267 | { | |
9268 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
9269 | extsymoff = 0; | |
9270 | } | |
9271 | else | |
9272 | { | |
9273 | locsymcount = symtab_hdr->sh_info; | |
9274 | extsymoff = symtab_hdr->sh_info; | |
9275 | } | |
9276 | ||
9277 | /* Read the local symbols. */ | |
9278 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
9279 | if (isymbuf == NULL && locsymcount != 0) | |
9280 | { | |
9281 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, locsymcount, 0, | |
8b127cbc AM |
9282 | flinfo->internal_syms, |
9283 | flinfo->external_syms, | |
9284 | flinfo->locsym_shndx); | |
c152c796 AM |
9285 | if (isymbuf == NULL) |
9286 | return FALSE; | |
9287 | } | |
9288 | ||
9289 | /* Find local symbol sections and adjust values of symbols in | |
9290 | SEC_MERGE sections. Write out those local symbols we know are | |
9291 | going into the output file. */ | |
9292 | isymend = isymbuf + locsymcount; | |
8b127cbc | 9293 | for (isym = isymbuf, pindex = flinfo->indices, ppsection = flinfo->sections; |
c152c796 AM |
9294 | isym < isymend; |
9295 | isym++, pindex++, ppsection++) | |
9296 | { | |
9297 | asection *isec; | |
9298 | const char *name; | |
9299 | Elf_Internal_Sym osym; | |
6e0b88f1 AM |
9300 | long indx; |
9301 | int ret; | |
c152c796 AM |
9302 | |
9303 | *pindex = -1; | |
9304 | ||
9305 | if (elf_bad_symtab (input_bfd)) | |
9306 | { | |
9307 | if (ELF_ST_BIND (isym->st_info) != STB_LOCAL) | |
9308 | { | |
9309 | *ppsection = NULL; | |
9310 | continue; | |
9311 | } | |
9312 | } | |
9313 | ||
9314 | if (isym->st_shndx == SHN_UNDEF) | |
9315 | isec = bfd_und_section_ptr; | |
c152c796 AM |
9316 | else if (isym->st_shndx == SHN_ABS) |
9317 | isec = bfd_abs_section_ptr; | |
9318 | else if (isym->st_shndx == SHN_COMMON) | |
9319 | isec = bfd_com_section_ptr; | |
9320 | else | |
9321 | { | |
cb33740c AM |
9322 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
9323 | if (isec == NULL) | |
9324 | { | |
9325 | /* Don't attempt to output symbols with st_shnx in the | |
9326 | reserved range other than SHN_ABS and SHN_COMMON. */ | |
9327 | *ppsection = NULL; | |
9328 | continue; | |
9329 | } | |
dbaa2011 | 9330 | else if (isec->sec_info_type == SEC_INFO_TYPE_MERGE |
cb33740c AM |
9331 | && ELF_ST_TYPE (isym->st_info) != STT_SECTION) |
9332 | isym->st_value = | |
9333 | _bfd_merged_section_offset (output_bfd, &isec, | |
9334 | elf_section_data (isec)->sec_info, | |
9335 | isym->st_value); | |
c152c796 AM |
9336 | } |
9337 | ||
9338 | *ppsection = isec; | |
9339 | ||
9340 | /* Don't output the first, undefined, symbol. */ | |
8b127cbc | 9341 | if (ppsection == flinfo->sections) |
c152c796 AM |
9342 | continue; |
9343 | ||
9344 | if (ELF_ST_TYPE (isym->st_info) == STT_SECTION) | |
9345 | { | |
9346 | /* We never output section symbols. Instead, we use the | |
9347 | section symbol of the corresponding section in the output | |
9348 | file. */ | |
9349 | continue; | |
9350 | } | |
9351 | ||
9352 | /* If we are stripping all symbols, we don't want to output this | |
9353 | one. */ | |
8b127cbc | 9354 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
9355 | continue; |
9356 | ||
9357 | /* If we are discarding all local symbols, we don't want to | |
9358 | output this one. If we are generating a relocatable output | |
9359 | file, then some of the local symbols may be required by | |
9360 | relocs; we output them below as we discover that they are | |
9361 | needed. */ | |
8b127cbc | 9362 | if (flinfo->info->discard == discard_all) |
c152c796 AM |
9363 | continue; |
9364 | ||
9365 | /* If this symbol is defined in a section which we are | |
f02571c5 AM |
9366 | discarding, we don't need to keep it. */ |
9367 | if (isym->st_shndx != SHN_UNDEF | |
4fbb74a6 AM |
9368 | && isym->st_shndx < SHN_LORESERVE |
9369 | && bfd_section_removed_from_list (output_bfd, | |
9370 | isec->output_section)) | |
e75a280b L |
9371 | continue; |
9372 | ||
c152c796 AM |
9373 | /* Get the name of the symbol. */ |
9374 | name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link, | |
9375 | isym->st_name); | |
9376 | if (name == NULL) | |
9377 | return FALSE; | |
9378 | ||
9379 | /* See if we are discarding symbols with this name. */ | |
8b127cbc AM |
9380 | if ((flinfo->info->strip == strip_some |
9381 | && (bfd_hash_lookup (flinfo->info->keep_hash, name, FALSE, FALSE) | |
c152c796 | 9382 | == NULL)) |
8b127cbc AM |
9383 | || (((flinfo->info->discard == discard_sec_merge |
9384 | && (isec->flags & SEC_MERGE) && !flinfo->info->relocatable) | |
9385 | || flinfo->info->discard == discard_l) | |
c152c796 AM |
9386 | && bfd_is_local_label_name (input_bfd, name))) |
9387 | continue; | |
9388 | ||
ffbc01cc AM |
9389 | if (ELF_ST_TYPE (isym->st_info) == STT_FILE) |
9390 | { | |
9391 | have_file_sym = TRUE; | |
9392 | flinfo->filesym_count += 1; | |
9393 | } | |
9394 | if (!have_file_sym) | |
9395 | { | |
9396 | /* In the absence of debug info, bfd_find_nearest_line uses | |
9397 | FILE symbols to determine the source file for local | |
9398 | function symbols. Provide a FILE symbol here if input | |
9399 | files lack such, so that their symbols won't be | |
9400 | associated with a previous input file. It's not the | |
9401 | source file, but the best we can do. */ | |
9402 | have_file_sym = TRUE; | |
9403 | flinfo->filesym_count += 1; | |
9404 | memset (&osym, 0, sizeof (osym)); | |
9405 | osym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE); | |
9406 | osym.st_shndx = SHN_ABS; | |
9407 | if (!elf_link_output_sym (flinfo, input_bfd->filename, &osym, | |
9408 | bfd_abs_section_ptr, NULL)) | |
9409 | return FALSE; | |
9410 | } | |
9411 | ||
c152c796 AM |
9412 | osym = *isym; |
9413 | ||
9414 | /* Adjust the section index for the output file. */ | |
9415 | osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9416 | isec->output_section); | |
9417 | if (osym.st_shndx == SHN_BAD) | |
9418 | return FALSE; | |
9419 | ||
c152c796 AM |
9420 | /* ELF symbols in relocatable files are section relative, but |
9421 | in executable files they are virtual addresses. Note that | |
9422 | this code assumes that all ELF sections have an associated | |
9423 | BFD section with a reasonable value for output_offset; below | |
9424 | we assume that they also have a reasonable value for | |
9425 | output_section. Any special sections must be set up to meet | |
9426 | these requirements. */ | |
9427 | osym.st_value += isec->output_offset; | |
8b127cbc | 9428 | if (!flinfo->info->relocatable) |
c152c796 AM |
9429 | { |
9430 | osym.st_value += isec->output_section->vma; | |
9431 | if (ELF_ST_TYPE (osym.st_info) == STT_TLS) | |
9432 | { | |
9433 | /* STT_TLS symbols are relative to PT_TLS segment base. */ | |
8b127cbc AM |
9434 | BFD_ASSERT (elf_hash_table (flinfo->info)->tls_sec != NULL); |
9435 | osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma; | |
c152c796 AM |
9436 | } |
9437 | } | |
9438 | ||
6e0b88f1 | 9439 | indx = bfd_get_symcount (output_bfd); |
8b127cbc | 9440 | ret = elf_link_output_sym (flinfo, name, &osym, isec, NULL); |
6e0b88f1 | 9441 | if (ret == 0) |
c152c796 | 9442 | return FALSE; |
6e0b88f1 AM |
9443 | else if (ret == 1) |
9444 | *pindex = indx; | |
c152c796 AM |
9445 | } |
9446 | ||
310fd250 L |
9447 | if (bed->s->arch_size == 32) |
9448 | { | |
9449 | r_type_mask = 0xff; | |
9450 | r_sym_shift = 8; | |
9451 | address_size = 4; | |
9452 | } | |
9453 | else | |
9454 | { | |
9455 | r_type_mask = 0xffffffff; | |
9456 | r_sym_shift = 32; | |
9457 | address_size = 8; | |
9458 | } | |
9459 | ||
c152c796 AM |
9460 | /* Relocate the contents of each section. */ |
9461 | sym_hashes = elf_sym_hashes (input_bfd); | |
9462 | for (o = input_bfd->sections; o != NULL; o = o->next) | |
9463 | { | |
9464 | bfd_byte *contents; | |
9465 | ||
9466 | if (! o->linker_mark) | |
9467 | { | |
9468 | /* This section was omitted from the link. */ | |
9469 | continue; | |
9470 | } | |
9471 | ||
8b127cbc | 9472 | if (flinfo->info->relocatable |
bcacc0f5 AM |
9473 | && (o->flags & (SEC_LINKER_CREATED | SEC_GROUP)) == SEC_GROUP) |
9474 | { | |
9475 | /* Deal with the group signature symbol. */ | |
9476 | struct bfd_elf_section_data *sec_data = elf_section_data (o); | |
9477 | unsigned long symndx = sec_data->this_hdr.sh_info; | |
9478 | asection *osec = o->output_section; | |
9479 | ||
9480 | if (symndx >= locsymcount | |
9481 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 9482 | && flinfo->sections[symndx] == NULL)) |
bcacc0f5 AM |
9483 | { |
9484 | struct elf_link_hash_entry *h = sym_hashes[symndx - extsymoff]; | |
9485 | while (h->root.type == bfd_link_hash_indirect | |
9486 | || h->root.type == bfd_link_hash_warning) | |
9487 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
9488 | /* Arrange for symbol to be output. */ | |
9489 | h->indx = -2; | |
9490 | elf_section_data (osec)->this_hdr.sh_info = -2; | |
9491 | } | |
9492 | else if (ELF_ST_TYPE (isymbuf[symndx].st_info) == STT_SECTION) | |
9493 | { | |
9494 | /* We'll use the output section target_index. */ | |
8b127cbc | 9495 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 AM |
9496 | elf_section_data (osec)->this_hdr.sh_info = sec->target_index; |
9497 | } | |
9498 | else | |
9499 | { | |
8b127cbc | 9500 | if (flinfo->indices[symndx] == -1) |
bcacc0f5 AM |
9501 | { |
9502 | /* Otherwise output the local symbol now. */ | |
9503 | Elf_Internal_Sym sym = isymbuf[symndx]; | |
8b127cbc | 9504 | asection *sec = flinfo->sections[symndx]->output_section; |
bcacc0f5 | 9505 | const char *name; |
6e0b88f1 AM |
9506 | long indx; |
9507 | int ret; | |
bcacc0f5 AM |
9508 | |
9509 | name = bfd_elf_string_from_elf_section (input_bfd, | |
9510 | symtab_hdr->sh_link, | |
9511 | sym.st_name); | |
9512 | if (name == NULL) | |
9513 | return FALSE; | |
9514 | ||
9515 | sym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd, | |
9516 | sec); | |
9517 | if (sym.st_shndx == SHN_BAD) | |
9518 | return FALSE; | |
9519 | ||
9520 | sym.st_value += o->output_offset; | |
9521 | ||
6e0b88f1 | 9522 | indx = bfd_get_symcount (output_bfd); |
8b127cbc | 9523 | ret = elf_link_output_sym (flinfo, name, &sym, o, NULL); |
6e0b88f1 | 9524 | if (ret == 0) |
bcacc0f5 | 9525 | return FALSE; |
6e0b88f1 | 9526 | else if (ret == 1) |
8b127cbc | 9527 | flinfo->indices[symndx] = indx; |
6e0b88f1 AM |
9528 | else |
9529 | abort (); | |
bcacc0f5 AM |
9530 | } |
9531 | elf_section_data (osec)->this_hdr.sh_info | |
8b127cbc | 9532 | = flinfo->indices[symndx]; |
bcacc0f5 AM |
9533 | } |
9534 | } | |
9535 | ||
c152c796 | 9536 | if ((o->flags & SEC_HAS_CONTENTS) == 0 |
eea6121a | 9537 | || (o->size == 0 && (o->flags & SEC_RELOC) == 0)) |
c152c796 AM |
9538 | continue; |
9539 | ||
9540 | if ((o->flags & SEC_LINKER_CREATED) != 0) | |
9541 | { | |
9542 | /* Section was created by _bfd_elf_link_create_dynamic_sections | |
9543 | or somesuch. */ | |
9544 | continue; | |
9545 | } | |
9546 | ||
9547 | /* Get the contents of the section. They have been cached by a | |
9548 | relaxation routine. Note that o is a section in an input | |
9549 | file, so the contents field will not have been set by any of | |
9550 | the routines which work on output files. */ | |
9551 | if (elf_section_data (o)->this_hdr.contents != NULL) | |
53291d1f AM |
9552 | { |
9553 | contents = elf_section_data (o)->this_hdr.contents; | |
9554 | if (bed->caches_rawsize | |
9555 | && o->rawsize != 0 | |
9556 | && o->rawsize < o->size) | |
9557 | { | |
9558 | memcpy (flinfo->contents, contents, o->rawsize); | |
9559 | contents = flinfo->contents; | |
9560 | } | |
9561 | } | |
c152c796 AM |
9562 | else |
9563 | { | |
8b127cbc | 9564 | contents = flinfo->contents; |
4a114e3e | 9565 | if (! bfd_get_full_section_contents (input_bfd, o, &contents)) |
c152c796 AM |
9566 | return FALSE; |
9567 | } | |
9568 | ||
9569 | if ((o->flags & SEC_RELOC) != 0) | |
9570 | { | |
9571 | Elf_Internal_Rela *internal_relocs; | |
0f02bbd9 | 9572 | Elf_Internal_Rela *rel, *relend; |
0f02bbd9 | 9573 | int action_discarded; |
ece5ef60 | 9574 | int ret; |
c152c796 AM |
9575 | |
9576 | /* Get the swapped relocs. */ | |
9577 | internal_relocs | |
8b127cbc AM |
9578 | = _bfd_elf_link_read_relocs (input_bfd, o, flinfo->external_relocs, |
9579 | flinfo->internal_relocs, FALSE); | |
c152c796 AM |
9580 | if (internal_relocs == NULL |
9581 | && o->reloc_count > 0) | |
9582 | return FALSE; | |
9583 | ||
310fd250 L |
9584 | /* We need to reverse-copy input .ctors/.dtors sections if |
9585 | they are placed in .init_array/.finit_array for output. */ | |
9586 | if (o->size > address_size | |
9587 | && ((strncmp (o->name, ".ctors", 6) == 0 | |
9588 | && strcmp (o->output_section->name, | |
9589 | ".init_array") == 0) | |
9590 | || (strncmp (o->name, ".dtors", 6) == 0 | |
9591 | && strcmp (o->output_section->name, | |
9592 | ".fini_array") == 0)) | |
9593 | && (o->name[6] == 0 || o->name[6] == '.')) | |
c152c796 | 9594 | { |
310fd250 L |
9595 | if (o->size != o->reloc_count * address_size) |
9596 | { | |
9597 | (*_bfd_error_handler) | |
9598 | (_("error: %B: size of section %A is not " | |
9599 | "multiple of address size"), | |
9600 | input_bfd, o); | |
9601 | bfd_set_error (bfd_error_on_input); | |
9602 | return FALSE; | |
9603 | } | |
9604 | o->flags |= SEC_ELF_REVERSE_COPY; | |
c152c796 AM |
9605 | } |
9606 | ||
0f02bbd9 | 9607 | action_discarded = -1; |
c152c796 | 9608 | if (!elf_section_ignore_discarded_relocs (o)) |
0f02bbd9 AM |
9609 | action_discarded = (*bed->action_discarded) (o); |
9610 | ||
9611 | /* Run through the relocs evaluating complex reloc symbols and | |
9612 | looking for relocs against symbols from discarded sections | |
9613 | or section symbols from removed link-once sections. | |
9614 | Complain about relocs against discarded sections. Zero | |
9615 | relocs against removed link-once sections. */ | |
9616 | ||
9617 | rel = internal_relocs; | |
9618 | relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
9619 | for ( ; rel < relend; rel++) | |
c152c796 | 9620 | { |
0f02bbd9 AM |
9621 | unsigned long r_symndx = rel->r_info >> r_sym_shift; |
9622 | unsigned int s_type; | |
9623 | asection **ps, *sec; | |
9624 | struct elf_link_hash_entry *h = NULL; | |
9625 | const char *sym_name; | |
c152c796 | 9626 | |
0f02bbd9 AM |
9627 | if (r_symndx == STN_UNDEF) |
9628 | continue; | |
c152c796 | 9629 | |
0f02bbd9 AM |
9630 | if (r_symndx >= locsymcount |
9631 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 9632 | && flinfo->sections[r_symndx] == NULL)) |
0f02bbd9 AM |
9633 | { |
9634 | h = sym_hashes[r_symndx - extsymoff]; | |
ee75fd95 | 9635 | |
0f02bbd9 AM |
9636 | /* Badly formatted input files can contain relocs that |
9637 | reference non-existant symbols. Check here so that | |
9638 | we do not seg fault. */ | |
9639 | if (h == NULL) | |
c152c796 | 9640 | { |
0f02bbd9 | 9641 | char buffer [32]; |
dce669a1 | 9642 | |
0f02bbd9 AM |
9643 | sprintf_vma (buffer, rel->r_info); |
9644 | (*_bfd_error_handler) | |
9645 | (_("error: %B contains a reloc (0x%s) for section %A " | |
9646 | "that references a non-existent global symbol"), | |
9647 | input_bfd, o, buffer); | |
9648 | bfd_set_error (bfd_error_bad_value); | |
9649 | return FALSE; | |
9650 | } | |
3b36f7e6 | 9651 | |
0f02bbd9 AM |
9652 | while (h->root.type == bfd_link_hash_indirect |
9653 | || h->root.type == bfd_link_hash_warning) | |
9654 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c152c796 | 9655 | |
0f02bbd9 | 9656 | s_type = h->type; |
cdd3575c | 9657 | |
0f02bbd9 AM |
9658 | ps = NULL; |
9659 | if (h->root.type == bfd_link_hash_defined | |
9660 | || h->root.type == bfd_link_hash_defweak) | |
9661 | ps = &h->root.u.def.section; | |
9662 | ||
9663 | sym_name = h->root.root.string; | |
9664 | } | |
9665 | else | |
9666 | { | |
9667 | Elf_Internal_Sym *sym = isymbuf + r_symndx; | |
9668 | ||
9669 | s_type = ELF_ST_TYPE (sym->st_info); | |
8b127cbc | 9670 | ps = &flinfo->sections[r_symndx]; |
0f02bbd9 AM |
9671 | sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, |
9672 | sym, *ps); | |
9673 | } | |
c152c796 | 9674 | |
c301e700 | 9675 | if ((s_type == STT_RELC || s_type == STT_SRELC) |
8b127cbc | 9676 | && !flinfo->info->relocatable) |
0f02bbd9 AM |
9677 | { |
9678 | bfd_vma val; | |
9679 | bfd_vma dot = (rel->r_offset | |
9680 | + o->output_offset + o->output_section->vma); | |
9681 | #ifdef DEBUG | |
9682 | printf ("Encountered a complex symbol!"); | |
9683 | printf (" (input_bfd %s, section %s, reloc %ld\n", | |
9ccb8af9 AM |
9684 | input_bfd->filename, o->name, |
9685 | (long) (rel - internal_relocs)); | |
0f02bbd9 AM |
9686 | printf (" symbol: idx %8.8lx, name %s\n", |
9687 | r_symndx, sym_name); | |
9688 | printf (" reloc : info %8.8lx, addr %8.8lx\n", | |
9689 | (unsigned long) rel->r_info, | |
9690 | (unsigned long) rel->r_offset); | |
9691 | #endif | |
8b127cbc | 9692 | if (!eval_symbol (&val, &sym_name, input_bfd, flinfo, dot, |
0f02bbd9 AM |
9693 | isymbuf, locsymcount, s_type == STT_SRELC)) |
9694 | return FALSE; | |
9695 | ||
9696 | /* Symbol evaluated OK. Update to absolute value. */ | |
9697 | set_symbol_value (input_bfd, isymbuf, locsymcount, | |
9698 | r_symndx, val); | |
9699 | continue; | |
9700 | } | |
9701 | ||
9702 | if (action_discarded != -1 && ps != NULL) | |
9703 | { | |
cdd3575c AM |
9704 | /* Complain if the definition comes from a |
9705 | discarded section. */ | |
dbaa2011 | 9706 | if ((sec = *ps) != NULL && discarded_section (sec)) |
cdd3575c | 9707 | { |
cf35638d | 9708 | BFD_ASSERT (r_symndx != STN_UNDEF); |
0f02bbd9 | 9709 | if (action_discarded & COMPLAIN) |
8b127cbc | 9710 | (*flinfo->info->callbacks->einfo) |
e1fffbe6 | 9711 | (_("%X`%s' referenced in section `%A' of %B: " |
58ac56d0 | 9712 | "defined in discarded section `%A' of %B\n"), |
e1fffbe6 | 9713 | sym_name, o, input_bfd, sec, sec->owner); |
cdd3575c | 9714 | |
87e5235d | 9715 | /* Try to do the best we can to support buggy old |
e0ae6d6f | 9716 | versions of gcc. Pretend that the symbol is |
87e5235d AM |
9717 | really defined in the kept linkonce section. |
9718 | FIXME: This is quite broken. Modifying the | |
9719 | symbol here means we will be changing all later | |
e0ae6d6f | 9720 | uses of the symbol, not just in this section. */ |
0f02bbd9 | 9721 | if (action_discarded & PRETEND) |
87e5235d | 9722 | { |
01b3c8ab L |
9723 | asection *kept; |
9724 | ||
c0f00686 | 9725 | kept = _bfd_elf_check_kept_section (sec, |
8b127cbc | 9726 | flinfo->info); |
01b3c8ab | 9727 | if (kept != NULL) |
87e5235d AM |
9728 | { |
9729 | *ps = kept; | |
9730 | continue; | |
9731 | } | |
9732 | } | |
c152c796 AM |
9733 | } |
9734 | } | |
9735 | } | |
9736 | ||
9737 | /* Relocate the section by invoking a back end routine. | |
9738 | ||
9739 | The back end routine is responsible for adjusting the | |
9740 | section contents as necessary, and (if using Rela relocs | |
9741 | and generating a relocatable output file) adjusting the | |
9742 | reloc addend as necessary. | |
9743 | ||
9744 | The back end routine does not have to worry about setting | |
9745 | the reloc address or the reloc symbol index. | |
9746 | ||
9747 | The back end routine is given a pointer to the swapped in | |
9748 | internal symbols, and can access the hash table entries | |
9749 | for the external symbols via elf_sym_hashes (input_bfd). | |
9750 | ||
9751 | When generating relocatable output, the back end routine | |
9752 | must handle STB_LOCAL/STT_SECTION symbols specially. The | |
9753 | output symbol is going to be a section symbol | |
9754 | corresponding to the output section, which will require | |
9755 | the addend to be adjusted. */ | |
9756 | ||
8b127cbc | 9757 | ret = (*relocate_section) (output_bfd, flinfo->info, |
c152c796 AM |
9758 | input_bfd, o, contents, |
9759 | internal_relocs, | |
9760 | isymbuf, | |
8b127cbc | 9761 | flinfo->sections); |
ece5ef60 | 9762 | if (!ret) |
c152c796 AM |
9763 | return FALSE; |
9764 | ||
ece5ef60 | 9765 | if (ret == 2 |
8b127cbc AM |
9766 | || flinfo->info->relocatable |
9767 | || flinfo->info->emitrelocations) | |
c152c796 AM |
9768 | { |
9769 | Elf_Internal_Rela *irela; | |
d4730f92 | 9770 | Elf_Internal_Rela *irelaend, *irelamid; |
c152c796 AM |
9771 | bfd_vma last_offset; |
9772 | struct elf_link_hash_entry **rel_hash; | |
d4730f92 BS |
9773 | struct elf_link_hash_entry **rel_hash_list, **rela_hash_list; |
9774 | Elf_Internal_Shdr *input_rel_hdr, *input_rela_hdr; | |
c152c796 | 9775 | unsigned int next_erel; |
c152c796 | 9776 | bfd_boolean rela_normal; |
d4730f92 | 9777 | struct bfd_elf_section_data *esdi, *esdo; |
c152c796 | 9778 | |
d4730f92 BS |
9779 | esdi = elf_section_data (o); |
9780 | esdo = elf_section_data (o->output_section); | |
9781 | rela_normal = FALSE; | |
c152c796 AM |
9782 | |
9783 | /* Adjust the reloc addresses and symbol indices. */ | |
9784 | ||
9785 | irela = internal_relocs; | |
9786 | irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel; | |
d4730f92 BS |
9787 | rel_hash = esdo->rel.hashes + esdo->rel.count; |
9788 | /* We start processing the REL relocs, if any. When we reach | |
9789 | IRELAMID in the loop, we switch to the RELA relocs. */ | |
9790 | irelamid = irela; | |
9791 | if (esdi->rel.hdr != NULL) | |
9792 | irelamid += (NUM_SHDR_ENTRIES (esdi->rel.hdr) | |
9793 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 9794 | rel_hash_list = rel_hash; |
d4730f92 | 9795 | rela_hash_list = NULL; |
c152c796 | 9796 | last_offset = o->output_offset; |
8b127cbc | 9797 | if (!flinfo->info->relocatable) |
c152c796 AM |
9798 | last_offset += o->output_section->vma; |
9799 | for (next_erel = 0; irela < irelaend; irela++, next_erel++) | |
9800 | { | |
9801 | unsigned long r_symndx; | |
9802 | asection *sec; | |
9803 | Elf_Internal_Sym sym; | |
9804 | ||
9805 | if (next_erel == bed->s->int_rels_per_ext_rel) | |
9806 | { | |
9807 | rel_hash++; | |
9808 | next_erel = 0; | |
9809 | } | |
9810 | ||
d4730f92 BS |
9811 | if (irela == irelamid) |
9812 | { | |
9813 | rel_hash = esdo->rela.hashes + esdo->rela.count; | |
9814 | rela_hash_list = rel_hash; | |
9815 | rela_normal = bed->rela_normal; | |
9816 | } | |
9817 | ||
c152c796 | 9818 | irela->r_offset = _bfd_elf_section_offset (output_bfd, |
8b127cbc | 9819 | flinfo->info, o, |
c152c796 AM |
9820 | irela->r_offset); |
9821 | if (irela->r_offset >= (bfd_vma) -2) | |
9822 | { | |
9823 | /* This is a reloc for a deleted entry or somesuch. | |
9824 | Turn it into an R_*_NONE reloc, at the same | |
9825 | offset as the last reloc. elf_eh_frame.c and | |
e460dd0d | 9826 | bfd_elf_discard_info rely on reloc offsets |
c152c796 AM |
9827 | being ordered. */ |
9828 | irela->r_offset = last_offset; | |
9829 | irela->r_info = 0; | |
9830 | irela->r_addend = 0; | |
9831 | continue; | |
9832 | } | |
9833 | ||
9834 | irela->r_offset += o->output_offset; | |
9835 | ||
9836 | /* Relocs in an executable have to be virtual addresses. */ | |
8b127cbc | 9837 | if (!flinfo->info->relocatable) |
c152c796 AM |
9838 | irela->r_offset += o->output_section->vma; |
9839 | ||
9840 | last_offset = irela->r_offset; | |
9841 | ||
9842 | r_symndx = irela->r_info >> r_sym_shift; | |
9843 | if (r_symndx == STN_UNDEF) | |
9844 | continue; | |
9845 | ||
9846 | if (r_symndx >= locsymcount | |
9847 | || (elf_bad_symtab (input_bfd) | |
8b127cbc | 9848 | && flinfo->sections[r_symndx] == NULL)) |
c152c796 AM |
9849 | { |
9850 | struct elf_link_hash_entry *rh; | |
9851 | unsigned long indx; | |
9852 | ||
9853 | /* This is a reloc against a global symbol. We | |
9854 | have not yet output all the local symbols, so | |
9855 | we do not know the symbol index of any global | |
9856 | symbol. We set the rel_hash entry for this | |
9857 | reloc to point to the global hash table entry | |
9858 | for this symbol. The symbol index is then | |
ee75fd95 | 9859 | set at the end of bfd_elf_final_link. */ |
c152c796 AM |
9860 | indx = r_symndx - extsymoff; |
9861 | rh = elf_sym_hashes (input_bfd)[indx]; | |
9862 | while (rh->root.type == bfd_link_hash_indirect | |
9863 | || rh->root.type == bfd_link_hash_warning) | |
9864 | rh = (struct elf_link_hash_entry *) rh->root.u.i.link; | |
9865 | ||
9866 | /* Setting the index to -2 tells | |
9867 | elf_link_output_extsym that this symbol is | |
9868 | used by a reloc. */ | |
9869 | BFD_ASSERT (rh->indx < 0); | |
9870 | rh->indx = -2; | |
9871 | ||
9872 | *rel_hash = rh; | |
9873 | ||
9874 | continue; | |
9875 | } | |
9876 | ||
9877 | /* This is a reloc against a local symbol. */ | |
9878 | ||
9879 | *rel_hash = NULL; | |
9880 | sym = isymbuf[r_symndx]; | |
8b127cbc | 9881 | sec = flinfo->sections[r_symndx]; |
c152c796 AM |
9882 | if (ELF_ST_TYPE (sym.st_info) == STT_SECTION) |
9883 | { | |
9884 | /* I suppose the backend ought to fill in the | |
9885 | section of any STT_SECTION symbol against a | |
6a8d1586 | 9886 | processor specific section. */ |
cf35638d | 9887 | r_symndx = STN_UNDEF; |
6a8d1586 AM |
9888 | if (bfd_is_abs_section (sec)) |
9889 | ; | |
c152c796 AM |
9890 | else if (sec == NULL || sec->owner == NULL) |
9891 | { | |
9892 | bfd_set_error (bfd_error_bad_value); | |
9893 | return FALSE; | |
9894 | } | |
9895 | else | |
9896 | { | |
6a8d1586 AM |
9897 | asection *osec = sec->output_section; |
9898 | ||
9899 | /* If we have discarded a section, the output | |
9900 | section will be the absolute section. In | |
ab96bf03 AM |
9901 | case of discarded SEC_MERGE sections, use |
9902 | the kept section. relocate_section should | |
9903 | have already handled discarded linkonce | |
9904 | sections. */ | |
6a8d1586 AM |
9905 | if (bfd_is_abs_section (osec) |
9906 | && sec->kept_section != NULL | |
9907 | && sec->kept_section->output_section != NULL) | |
9908 | { | |
9909 | osec = sec->kept_section->output_section; | |
9910 | irela->r_addend -= osec->vma; | |
9911 | } | |
9912 | ||
9913 | if (!bfd_is_abs_section (osec)) | |
9914 | { | |
9915 | r_symndx = osec->target_index; | |
cf35638d | 9916 | if (r_symndx == STN_UNDEF) |
74541ad4 | 9917 | { |
051d833a AM |
9918 | irela->r_addend += osec->vma; |
9919 | osec = _bfd_nearby_section (output_bfd, osec, | |
9920 | osec->vma); | |
9921 | irela->r_addend -= osec->vma; | |
9922 | r_symndx = osec->target_index; | |
74541ad4 | 9923 | } |
6a8d1586 | 9924 | } |
c152c796 AM |
9925 | } |
9926 | ||
9927 | /* Adjust the addend according to where the | |
9928 | section winds up in the output section. */ | |
9929 | if (rela_normal) | |
9930 | irela->r_addend += sec->output_offset; | |
9931 | } | |
9932 | else | |
9933 | { | |
8b127cbc | 9934 | if (flinfo->indices[r_symndx] == -1) |
c152c796 AM |
9935 | { |
9936 | unsigned long shlink; | |
9937 | const char *name; | |
9938 | asection *osec; | |
6e0b88f1 | 9939 | long indx; |
c152c796 | 9940 | |
8b127cbc | 9941 | if (flinfo->info->strip == strip_all) |
c152c796 AM |
9942 | { |
9943 | /* You can't do ld -r -s. */ | |
9944 | bfd_set_error (bfd_error_invalid_operation); | |
9945 | return FALSE; | |
9946 | } | |
9947 | ||
9948 | /* This symbol was skipped earlier, but | |
9949 | since it is needed by a reloc, we | |
9950 | must output it now. */ | |
9951 | shlink = symtab_hdr->sh_link; | |
9952 | name = (bfd_elf_string_from_elf_section | |
9953 | (input_bfd, shlink, sym.st_name)); | |
9954 | if (name == NULL) | |
9955 | return FALSE; | |
9956 | ||
9957 | osec = sec->output_section; | |
9958 | sym.st_shndx = | |
9959 | _bfd_elf_section_from_bfd_section (output_bfd, | |
9960 | osec); | |
9961 | if (sym.st_shndx == SHN_BAD) | |
9962 | return FALSE; | |
9963 | ||
9964 | sym.st_value += sec->output_offset; | |
8b127cbc | 9965 | if (!flinfo->info->relocatable) |
c152c796 AM |
9966 | { |
9967 | sym.st_value += osec->vma; | |
9968 | if (ELF_ST_TYPE (sym.st_info) == STT_TLS) | |
9969 | { | |
9970 | /* STT_TLS symbols are relative to PT_TLS | |
9971 | segment base. */ | |
8b127cbc | 9972 | BFD_ASSERT (elf_hash_table (flinfo->info) |
c152c796 | 9973 | ->tls_sec != NULL); |
8b127cbc | 9974 | sym.st_value -= (elf_hash_table (flinfo->info) |
c152c796 AM |
9975 | ->tls_sec->vma); |
9976 | } | |
9977 | } | |
9978 | ||
6e0b88f1 | 9979 | indx = bfd_get_symcount (output_bfd); |
8b127cbc | 9980 | ret = elf_link_output_sym (flinfo, name, &sym, sec, |
6e0b88f1 AM |
9981 | NULL); |
9982 | if (ret == 0) | |
c152c796 | 9983 | return FALSE; |
6e0b88f1 | 9984 | else if (ret == 1) |
8b127cbc | 9985 | flinfo->indices[r_symndx] = indx; |
6e0b88f1 AM |
9986 | else |
9987 | abort (); | |
c152c796 AM |
9988 | } |
9989 | ||
8b127cbc | 9990 | r_symndx = flinfo->indices[r_symndx]; |
c152c796 AM |
9991 | } |
9992 | ||
9993 | irela->r_info = ((bfd_vma) r_symndx << r_sym_shift | |
9994 | | (irela->r_info & r_type_mask)); | |
9995 | } | |
9996 | ||
9997 | /* Swap out the relocs. */ | |
d4730f92 BS |
9998 | input_rel_hdr = esdi->rel.hdr; |
9999 | if (input_rel_hdr && input_rel_hdr->sh_size != 0) | |
c152c796 | 10000 | { |
d4730f92 BS |
10001 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
10002 | input_rel_hdr, | |
10003 | internal_relocs, | |
10004 | rel_hash_list)) | |
10005 | return FALSE; | |
c152c796 AM |
10006 | internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr) |
10007 | * bed->s->int_rels_per_ext_rel); | |
eac338cf | 10008 | rel_hash_list += NUM_SHDR_ENTRIES (input_rel_hdr); |
d4730f92 BS |
10009 | } |
10010 | ||
10011 | input_rela_hdr = esdi->rela.hdr; | |
10012 | if (input_rela_hdr && input_rela_hdr->sh_size != 0) | |
10013 | { | |
eac338cf | 10014 | if (!bed->elf_backend_emit_relocs (output_bfd, o, |
d4730f92 | 10015 | input_rela_hdr, |
eac338cf | 10016 | internal_relocs, |
d4730f92 | 10017 | rela_hash_list)) |
c152c796 AM |
10018 | return FALSE; |
10019 | } | |
10020 | } | |
10021 | } | |
10022 | ||
10023 | /* Write out the modified section contents. */ | |
10024 | if (bed->elf_backend_write_section | |
8b127cbc | 10025 | && (*bed->elf_backend_write_section) (output_bfd, flinfo->info, o, |
c7b8f16e | 10026 | contents)) |
c152c796 AM |
10027 | { |
10028 | /* Section written out. */ | |
10029 | } | |
10030 | else switch (o->sec_info_type) | |
10031 | { | |
dbaa2011 | 10032 | case SEC_INFO_TYPE_STABS: |
c152c796 AM |
10033 | if (! (_bfd_write_section_stabs |
10034 | (output_bfd, | |
8b127cbc | 10035 | &elf_hash_table (flinfo->info)->stab_info, |
c152c796 AM |
10036 | o, &elf_section_data (o)->sec_info, contents))) |
10037 | return FALSE; | |
10038 | break; | |
dbaa2011 | 10039 | case SEC_INFO_TYPE_MERGE: |
c152c796 AM |
10040 | if (! _bfd_write_merged_section (output_bfd, o, |
10041 | elf_section_data (o)->sec_info)) | |
10042 | return FALSE; | |
10043 | break; | |
dbaa2011 | 10044 | case SEC_INFO_TYPE_EH_FRAME: |
c152c796 | 10045 | { |
8b127cbc | 10046 | if (! _bfd_elf_write_section_eh_frame (output_bfd, flinfo->info, |
c152c796 AM |
10047 | o, contents)) |
10048 | return FALSE; | |
10049 | } | |
10050 | break; | |
10051 | default: | |
10052 | { | |
5dabe785 | 10053 | /* FIXME: octets_per_byte. */ |
310fd250 L |
10054 | if (! (o->flags & SEC_EXCLUDE)) |
10055 | { | |
10056 | file_ptr offset = (file_ptr) o->output_offset; | |
10057 | bfd_size_type todo = o->size; | |
10058 | if ((o->flags & SEC_ELF_REVERSE_COPY)) | |
10059 | { | |
10060 | /* Reverse-copy input section to output. */ | |
10061 | do | |
10062 | { | |
10063 | todo -= address_size; | |
10064 | if (! bfd_set_section_contents (output_bfd, | |
10065 | o->output_section, | |
10066 | contents + todo, | |
10067 | offset, | |
10068 | address_size)) | |
10069 | return FALSE; | |
10070 | if (todo == 0) | |
10071 | break; | |
10072 | offset += address_size; | |
10073 | } | |
10074 | while (1); | |
10075 | } | |
10076 | else if (! bfd_set_section_contents (output_bfd, | |
10077 | o->output_section, | |
10078 | contents, | |
10079 | offset, todo)) | |
10080 | return FALSE; | |
10081 | } | |
c152c796 AM |
10082 | } |
10083 | break; | |
10084 | } | |
10085 | } | |
10086 | ||
10087 | return TRUE; | |
10088 | } | |
10089 | ||
10090 | /* Generate a reloc when linking an ELF file. This is a reloc | |
3a800eb9 | 10091 | requested by the linker, and does not come from any input file. This |
c152c796 AM |
10092 | is used to build constructor and destructor tables when linking |
10093 | with -Ur. */ | |
10094 | ||
10095 | static bfd_boolean | |
10096 | elf_reloc_link_order (bfd *output_bfd, | |
10097 | struct bfd_link_info *info, | |
10098 | asection *output_section, | |
10099 | struct bfd_link_order *link_order) | |
10100 | { | |
10101 | reloc_howto_type *howto; | |
10102 | long indx; | |
10103 | bfd_vma offset; | |
10104 | bfd_vma addend; | |
d4730f92 | 10105 | struct bfd_elf_section_reloc_data *reldata; |
c152c796 AM |
10106 | struct elf_link_hash_entry **rel_hash_ptr; |
10107 | Elf_Internal_Shdr *rel_hdr; | |
10108 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
10109 | Elf_Internal_Rela irel[MAX_INT_RELS_PER_EXT_REL]; | |
10110 | bfd_byte *erel; | |
10111 | unsigned int i; | |
d4730f92 | 10112 | struct bfd_elf_section_data *esdo = elf_section_data (output_section); |
c152c796 AM |
10113 | |
10114 | howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc); | |
10115 | if (howto == NULL) | |
10116 | { | |
10117 | bfd_set_error (bfd_error_bad_value); | |
10118 | return FALSE; | |
10119 | } | |
10120 | ||
10121 | addend = link_order->u.reloc.p->addend; | |
10122 | ||
d4730f92 BS |
10123 | if (esdo->rel.hdr) |
10124 | reldata = &esdo->rel; | |
10125 | else if (esdo->rela.hdr) | |
10126 | reldata = &esdo->rela; | |
10127 | else | |
10128 | { | |
10129 | reldata = NULL; | |
10130 | BFD_ASSERT (0); | |
10131 | } | |
10132 | ||
c152c796 | 10133 | /* Figure out the symbol index. */ |
d4730f92 | 10134 | rel_hash_ptr = reldata->hashes + reldata->count; |
c152c796 AM |
10135 | if (link_order->type == bfd_section_reloc_link_order) |
10136 | { | |
10137 | indx = link_order->u.reloc.p->u.section->target_index; | |
10138 | BFD_ASSERT (indx != 0); | |
10139 | *rel_hash_ptr = NULL; | |
10140 | } | |
10141 | else | |
10142 | { | |
10143 | struct elf_link_hash_entry *h; | |
10144 | ||
10145 | /* Treat a reloc against a defined symbol as though it were | |
10146 | actually against the section. */ | |
10147 | h = ((struct elf_link_hash_entry *) | |
10148 | bfd_wrapped_link_hash_lookup (output_bfd, info, | |
10149 | link_order->u.reloc.p->u.name, | |
10150 | FALSE, FALSE, TRUE)); | |
10151 | if (h != NULL | |
10152 | && (h->root.type == bfd_link_hash_defined | |
10153 | || h->root.type == bfd_link_hash_defweak)) | |
10154 | { | |
10155 | asection *section; | |
10156 | ||
10157 | section = h->root.u.def.section; | |
10158 | indx = section->output_section->target_index; | |
10159 | *rel_hash_ptr = NULL; | |
10160 | /* It seems that we ought to add the symbol value to the | |
10161 | addend here, but in practice it has already been added | |
10162 | because it was passed to constructor_callback. */ | |
10163 | addend += section->output_section->vma + section->output_offset; | |
10164 | } | |
10165 | else if (h != NULL) | |
10166 | { | |
10167 | /* Setting the index to -2 tells elf_link_output_extsym that | |
10168 | this symbol is used by a reloc. */ | |
10169 | h->indx = -2; | |
10170 | *rel_hash_ptr = h; | |
10171 | indx = 0; | |
10172 | } | |
10173 | else | |
10174 | { | |
10175 | if (! ((*info->callbacks->unattached_reloc) | |
10176 | (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) | |
10177 | return FALSE; | |
10178 | indx = 0; | |
10179 | } | |
10180 | } | |
10181 | ||
10182 | /* If this is an inplace reloc, we must write the addend into the | |
10183 | object file. */ | |
10184 | if (howto->partial_inplace && addend != 0) | |
10185 | { | |
10186 | bfd_size_type size; | |
10187 | bfd_reloc_status_type rstat; | |
10188 | bfd_byte *buf; | |
10189 | bfd_boolean ok; | |
10190 | const char *sym_name; | |
10191 | ||
a50b1753 NC |
10192 | size = (bfd_size_type) bfd_get_reloc_size (howto); |
10193 | buf = (bfd_byte *) bfd_zmalloc (size); | |
c152c796 AM |
10194 | if (buf == NULL) |
10195 | return FALSE; | |
10196 | rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf); | |
10197 | switch (rstat) | |
10198 | { | |
10199 | case bfd_reloc_ok: | |
10200 | break; | |
10201 | ||
10202 | default: | |
10203 | case bfd_reloc_outofrange: | |
10204 | abort (); | |
10205 | ||
10206 | case bfd_reloc_overflow: | |
10207 | if (link_order->type == bfd_section_reloc_link_order) | |
10208 | sym_name = bfd_section_name (output_bfd, | |
10209 | link_order->u.reloc.p->u.section); | |
10210 | else | |
10211 | sym_name = link_order->u.reloc.p->u.name; | |
10212 | if (! ((*info->callbacks->reloc_overflow) | |
dfeffb9f L |
10213 | (info, NULL, sym_name, howto->name, addend, NULL, |
10214 | NULL, (bfd_vma) 0))) | |
c152c796 AM |
10215 | { |
10216 | free (buf); | |
10217 | return FALSE; | |
10218 | } | |
10219 | break; | |
10220 | } | |
10221 | ok = bfd_set_section_contents (output_bfd, output_section, buf, | |
10222 | link_order->offset, size); | |
10223 | free (buf); | |
10224 | if (! ok) | |
10225 | return FALSE; | |
10226 | } | |
10227 | ||
10228 | /* The address of a reloc is relative to the section in a | |
10229 | relocatable file, and is a virtual address in an executable | |
10230 | file. */ | |
10231 | offset = link_order->offset; | |
10232 | if (! info->relocatable) | |
10233 | offset += output_section->vma; | |
10234 | ||
10235 | for (i = 0; i < bed->s->int_rels_per_ext_rel; i++) | |
10236 | { | |
10237 | irel[i].r_offset = offset; | |
10238 | irel[i].r_info = 0; | |
10239 | irel[i].r_addend = 0; | |
10240 | } | |
10241 | if (bed->s->arch_size == 32) | |
10242 | irel[0].r_info = ELF32_R_INFO (indx, howto->type); | |
10243 | else | |
10244 | irel[0].r_info = ELF64_R_INFO (indx, howto->type); | |
10245 | ||
d4730f92 | 10246 | rel_hdr = reldata->hdr; |
c152c796 AM |
10247 | erel = rel_hdr->contents; |
10248 | if (rel_hdr->sh_type == SHT_REL) | |
10249 | { | |
d4730f92 | 10250 | erel += reldata->count * bed->s->sizeof_rel; |
c152c796 AM |
10251 | (*bed->s->swap_reloc_out) (output_bfd, irel, erel); |
10252 | } | |
10253 | else | |
10254 | { | |
10255 | irel[0].r_addend = addend; | |
d4730f92 | 10256 | erel += reldata->count * bed->s->sizeof_rela; |
c152c796 AM |
10257 | (*bed->s->swap_reloca_out) (output_bfd, irel, erel); |
10258 | } | |
10259 | ||
d4730f92 | 10260 | ++reldata->count; |
c152c796 AM |
10261 | |
10262 | return TRUE; | |
10263 | } | |
10264 | ||
0b52efa6 PB |
10265 | |
10266 | /* Get the output vma of the section pointed to by the sh_link field. */ | |
10267 | ||
10268 | static bfd_vma | |
10269 | elf_get_linked_section_vma (struct bfd_link_order *p) | |
10270 | { | |
10271 | Elf_Internal_Shdr **elf_shdrp; | |
10272 | asection *s; | |
10273 | int elfsec; | |
10274 | ||
10275 | s = p->u.indirect.section; | |
10276 | elf_shdrp = elf_elfsections (s->owner); | |
10277 | elfsec = _bfd_elf_section_from_bfd_section (s->owner, s); | |
10278 | elfsec = elf_shdrp[elfsec]->sh_link; | |
185d09ad L |
10279 | /* PR 290: |
10280 | The Intel C compiler generates SHT_IA_64_UNWIND with | |
e04bcc6d | 10281 | SHF_LINK_ORDER. But it doesn't set the sh_link or |
185d09ad L |
10282 | sh_info fields. Hence we could get the situation |
10283 | where elfsec is 0. */ | |
10284 | if (elfsec == 0) | |
10285 | { | |
10286 | const struct elf_backend_data *bed | |
10287 | = get_elf_backend_data (s->owner); | |
10288 | if (bed->link_order_error_handler) | |
d003868e AM |
10289 | bed->link_order_error_handler |
10290 | (_("%B: warning: sh_link not set for section `%A'"), s->owner, s); | |
185d09ad L |
10291 | return 0; |
10292 | } | |
10293 | else | |
10294 | { | |
10295 | s = elf_shdrp[elfsec]->bfd_section; | |
10296 | return s->output_section->vma + s->output_offset; | |
10297 | } | |
0b52efa6 PB |
10298 | } |
10299 | ||
10300 | ||
10301 | /* Compare two sections based on the locations of the sections they are | |
10302 | linked to. Used by elf_fixup_link_order. */ | |
10303 | ||
10304 | static int | |
10305 | compare_link_order (const void * a, const void * b) | |
10306 | { | |
10307 | bfd_vma apos; | |
10308 | bfd_vma bpos; | |
10309 | ||
10310 | apos = elf_get_linked_section_vma (*(struct bfd_link_order **)a); | |
10311 | bpos = elf_get_linked_section_vma (*(struct bfd_link_order **)b); | |
10312 | if (apos < bpos) | |
10313 | return -1; | |
10314 | return apos > bpos; | |
10315 | } | |
10316 | ||
10317 | ||
10318 | /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same | |
10319 | order as their linked sections. Returns false if this could not be done | |
10320 | because an output section includes both ordered and unordered | |
10321 | sections. Ideally we'd do this in the linker proper. */ | |
10322 | ||
10323 | static bfd_boolean | |
10324 | elf_fixup_link_order (bfd *abfd, asection *o) | |
10325 | { | |
10326 | int seen_linkorder; | |
10327 | int seen_other; | |
10328 | int n; | |
10329 | struct bfd_link_order *p; | |
10330 | bfd *sub; | |
10331 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
b761a207 | 10332 | unsigned elfsec; |
0b52efa6 | 10333 | struct bfd_link_order **sections; |
d33cdfe3 | 10334 | asection *s, *other_sec, *linkorder_sec; |
0b52efa6 | 10335 | bfd_vma offset; |
3b36f7e6 | 10336 | |
d33cdfe3 L |
10337 | other_sec = NULL; |
10338 | linkorder_sec = NULL; | |
0b52efa6 PB |
10339 | seen_other = 0; |
10340 | seen_linkorder = 0; | |
8423293d | 10341 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 | 10342 | { |
d33cdfe3 | 10343 | if (p->type == bfd_indirect_link_order) |
0b52efa6 PB |
10344 | { |
10345 | s = p->u.indirect.section; | |
d33cdfe3 L |
10346 | sub = s->owner; |
10347 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour | |
10348 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass | |
b761a207 BE |
10349 | && (elfsec = _bfd_elf_section_from_bfd_section (sub, s)) |
10350 | && elfsec < elf_numsections (sub) | |
4fbb74a6 AM |
10351 | && elf_elfsections (sub)[elfsec]->sh_flags & SHF_LINK_ORDER |
10352 | && elf_elfsections (sub)[elfsec]->sh_link < elf_numsections (sub)) | |
d33cdfe3 L |
10353 | { |
10354 | seen_linkorder++; | |
10355 | linkorder_sec = s; | |
10356 | } | |
0b52efa6 | 10357 | else |
d33cdfe3 L |
10358 | { |
10359 | seen_other++; | |
10360 | other_sec = s; | |
10361 | } | |
0b52efa6 PB |
10362 | } |
10363 | else | |
10364 | seen_other++; | |
d33cdfe3 L |
10365 | |
10366 | if (seen_other && seen_linkorder) | |
10367 | { | |
10368 | if (other_sec && linkorder_sec) | |
10369 | (*_bfd_error_handler) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"), | |
10370 | o, linkorder_sec, | |
10371 | linkorder_sec->owner, other_sec, | |
10372 | other_sec->owner); | |
10373 | else | |
10374 | (*_bfd_error_handler) (_("%A has both ordered and unordered sections"), | |
10375 | o); | |
10376 | bfd_set_error (bfd_error_bad_value); | |
10377 | return FALSE; | |
10378 | } | |
0b52efa6 PB |
10379 | } |
10380 | ||
10381 | if (!seen_linkorder) | |
10382 | return TRUE; | |
10383 | ||
0b52efa6 | 10384 | sections = (struct bfd_link_order **) |
14b1c01e AM |
10385 | bfd_malloc (seen_linkorder * sizeof (struct bfd_link_order *)); |
10386 | if (sections == NULL) | |
10387 | return FALSE; | |
0b52efa6 | 10388 | seen_linkorder = 0; |
3b36f7e6 | 10389 | |
8423293d | 10390 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
0b52efa6 PB |
10391 | { |
10392 | sections[seen_linkorder++] = p; | |
10393 | } | |
10394 | /* Sort the input sections in the order of their linked section. */ | |
10395 | qsort (sections, seen_linkorder, sizeof (struct bfd_link_order *), | |
10396 | compare_link_order); | |
10397 | ||
10398 | /* Change the offsets of the sections. */ | |
10399 | offset = 0; | |
10400 | for (n = 0; n < seen_linkorder; n++) | |
10401 | { | |
10402 | s = sections[n]->u.indirect.section; | |
461686a3 | 10403 | offset &= ~(bfd_vma) 0 << s->alignment_power; |
0b52efa6 PB |
10404 | s->output_offset = offset; |
10405 | sections[n]->offset = offset; | |
5dabe785 | 10406 | /* FIXME: octets_per_byte. */ |
0b52efa6 PB |
10407 | offset += sections[n]->size; |
10408 | } | |
10409 | ||
4dd07732 | 10410 | free (sections); |
0b52efa6 PB |
10411 | return TRUE; |
10412 | } | |
10413 | ||
9f7c3e5e AM |
10414 | static void |
10415 | elf_final_link_free (bfd *obfd, struct elf_final_link_info *flinfo) | |
10416 | { | |
10417 | asection *o; | |
10418 | ||
10419 | if (flinfo->symstrtab != NULL) | |
10420 | _bfd_stringtab_free (flinfo->symstrtab); | |
10421 | if (flinfo->contents != NULL) | |
10422 | free (flinfo->contents); | |
10423 | if (flinfo->external_relocs != NULL) | |
10424 | free (flinfo->external_relocs); | |
10425 | if (flinfo->internal_relocs != NULL) | |
10426 | free (flinfo->internal_relocs); | |
10427 | if (flinfo->external_syms != NULL) | |
10428 | free (flinfo->external_syms); | |
10429 | if (flinfo->locsym_shndx != NULL) | |
10430 | free (flinfo->locsym_shndx); | |
10431 | if (flinfo->internal_syms != NULL) | |
10432 | free (flinfo->internal_syms); | |
10433 | if (flinfo->indices != NULL) | |
10434 | free (flinfo->indices); | |
10435 | if (flinfo->sections != NULL) | |
10436 | free (flinfo->sections); | |
10437 | if (flinfo->symbuf != NULL) | |
10438 | free (flinfo->symbuf); | |
10439 | if (flinfo->symshndxbuf != NULL) | |
10440 | free (flinfo->symshndxbuf); | |
10441 | for (o = obfd->sections; o != NULL; o = o->next) | |
10442 | { | |
10443 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
10444 | if ((o->flags & SEC_RELOC) != 0 && esdo->rel.hashes != NULL) | |
10445 | free (esdo->rel.hashes); | |
10446 | if ((o->flags & SEC_RELOC) != 0 && esdo->rela.hashes != NULL) | |
10447 | free (esdo->rela.hashes); | |
10448 | } | |
10449 | } | |
0b52efa6 | 10450 | |
c152c796 AM |
10451 | /* Do the final step of an ELF link. */ |
10452 | ||
10453 | bfd_boolean | |
10454 | bfd_elf_final_link (bfd *abfd, struct bfd_link_info *info) | |
10455 | { | |
10456 | bfd_boolean dynamic; | |
10457 | bfd_boolean emit_relocs; | |
10458 | bfd *dynobj; | |
8b127cbc | 10459 | struct elf_final_link_info flinfo; |
91d6fa6a NC |
10460 | asection *o; |
10461 | struct bfd_link_order *p; | |
10462 | bfd *sub; | |
c152c796 AM |
10463 | bfd_size_type max_contents_size; |
10464 | bfd_size_type max_external_reloc_size; | |
10465 | bfd_size_type max_internal_reloc_count; | |
10466 | bfd_size_type max_sym_count; | |
10467 | bfd_size_type max_sym_shndx_count; | |
10468 | file_ptr off; | |
10469 | Elf_Internal_Sym elfsym; | |
10470 | unsigned int i; | |
10471 | Elf_Internal_Shdr *symtab_hdr; | |
10472 | Elf_Internal_Shdr *symtab_shndx_hdr; | |
10473 | Elf_Internal_Shdr *symstrtab_hdr; | |
10474 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
10475 | struct elf_outext_info eoinfo; | |
10476 | bfd_boolean merged; | |
10477 | size_t relativecount = 0; | |
10478 | asection *reldyn = 0; | |
10479 | bfd_size_type amt; | |
104d59d1 JM |
10480 | asection *attr_section = NULL; |
10481 | bfd_vma attr_size = 0; | |
10482 | const char *std_attrs_section; | |
c152c796 AM |
10483 | |
10484 | if (! is_elf_hash_table (info->hash)) | |
10485 | return FALSE; | |
10486 | ||
10487 | if (info->shared) | |
10488 | abfd->flags |= DYNAMIC; | |
10489 | ||
10490 | dynamic = elf_hash_table (info)->dynamic_sections_created; | |
10491 | dynobj = elf_hash_table (info)->dynobj; | |
10492 | ||
10493 | emit_relocs = (info->relocatable | |
a4676736 | 10494 | || info->emitrelocations); |
c152c796 | 10495 | |
8b127cbc AM |
10496 | flinfo.info = info; |
10497 | flinfo.output_bfd = abfd; | |
10498 | flinfo.symstrtab = _bfd_elf_stringtab_init (); | |
10499 | if (flinfo.symstrtab == NULL) | |
c152c796 AM |
10500 | return FALSE; |
10501 | ||
10502 | if (! dynamic) | |
10503 | { | |
8b127cbc AM |
10504 | flinfo.dynsym_sec = NULL; |
10505 | flinfo.hash_sec = NULL; | |
10506 | flinfo.symver_sec = NULL; | |
c152c796 AM |
10507 | } |
10508 | else | |
10509 | { | |
3d4d4302 AM |
10510 | flinfo.dynsym_sec = bfd_get_linker_section (dynobj, ".dynsym"); |
10511 | flinfo.hash_sec = bfd_get_linker_section (dynobj, ".hash"); | |
202e2356 | 10512 | /* Note that dynsym_sec can be NULL (on VMS). */ |
3d4d4302 | 10513 | flinfo.symver_sec = bfd_get_linker_section (dynobj, ".gnu.version"); |
c152c796 AM |
10514 | /* Note that it is OK if symver_sec is NULL. */ |
10515 | } | |
10516 | ||
8b127cbc AM |
10517 | flinfo.contents = NULL; |
10518 | flinfo.external_relocs = NULL; | |
10519 | flinfo.internal_relocs = NULL; | |
10520 | flinfo.external_syms = NULL; | |
10521 | flinfo.locsym_shndx = NULL; | |
10522 | flinfo.internal_syms = NULL; | |
10523 | flinfo.indices = NULL; | |
10524 | flinfo.sections = NULL; | |
10525 | flinfo.symbuf = NULL; | |
10526 | flinfo.symshndxbuf = NULL; | |
10527 | flinfo.symbuf_count = 0; | |
10528 | flinfo.shndxbuf_size = 0; | |
ffbc01cc | 10529 | flinfo.filesym_count = 0; |
c152c796 | 10530 | |
104d59d1 JM |
10531 | /* The object attributes have been merged. Remove the input |
10532 | sections from the link, and set the contents of the output | |
10533 | secton. */ | |
10534 | std_attrs_section = get_elf_backend_data (abfd)->obj_attrs_section; | |
10535 | for (o = abfd->sections; o != NULL; o = o->next) | |
10536 | { | |
10537 | if ((std_attrs_section && strcmp (o->name, std_attrs_section) == 0) | |
10538 | || strcmp (o->name, ".gnu.attributes") == 0) | |
10539 | { | |
10540 | for (p = o->map_head.link_order; p != NULL; p = p->next) | |
10541 | { | |
10542 | asection *input_section; | |
10543 | ||
10544 | if (p->type != bfd_indirect_link_order) | |
10545 | continue; | |
10546 | input_section = p->u.indirect.section; | |
10547 | /* Hack: reset the SEC_HAS_CONTENTS flag so that | |
10548 | elf_link_input_bfd ignores this section. */ | |
10549 | input_section->flags &= ~SEC_HAS_CONTENTS; | |
10550 | } | |
a0c8462f | 10551 | |
104d59d1 JM |
10552 | attr_size = bfd_elf_obj_attr_size (abfd); |
10553 | if (attr_size) | |
10554 | { | |
10555 | bfd_set_section_size (abfd, o, attr_size); | |
10556 | attr_section = o; | |
10557 | /* Skip this section later on. */ | |
10558 | o->map_head.link_order = NULL; | |
10559 | } | |
10560 | else | |
10561 | o->flags |= SEC_EXCLUDE; | |
10562 | } | |
10563 | } | |
10564 | ||
c152c796 AM |
10565 | /* Count up the number of relocations we will output for each output |
10566 | section, so that we know the sizes of the reloc sections. We | |
10567 | also figure out some maximum sizes. */ | |
10568 | max_contents_size = 0; | |
10569 | max_external_reloc_size = 0; | |
10570 | max_internal_reloc_count = 0; | |
10571 | max_sym_count = 0; | |
10572 | max_sym_shndx_count = 0; | |
10573 | merged = FALSE; | |
10574 | for (o = abfd->sections; o != NULL; o = o->next) | |
10575 | { | |
10576 | struct bfd_elf_section_data *esdo = elf_section_data (o); | |
10577 | o->reloc_count = 0; | |
10578 | ||
8423293d | 10579 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
10580 | { |
10581 | unsigned int reloc_count = 0; | |
10582 | struct bfd_elf_section_data *esdi = NULL; | |
c152c796 AM |
10583 | |
10584 | if (p->type == bfd_section_reloc_link_order | |
10585 | || p->type == bfd_symbol_reloc_link_order) | |
10586 | reloc_count = 1; | |
10587 | else if (p->type == bfd_indirect_link_order) | |
10588 | { | |
10589 | asection *sec; | |
10590 | ||
10591 | sec = p->u.indirect.section; | |
10592 | esdi = elf_section_data (sec); | |
10593 | ||
10594 | /* Mark all sections which are to be included in the | |
10595 | link. This will normally be every section. We need | |
10596 | to do this so that we can identify any sections which | |
10597 | the linker has decided to not include. */ | |
10598 | sec->linker_mark = TRUE; | |
10599 | ||
10600 | if (sec->flags & SEC_MERGE) | |
10601 | merged = TRUE; | |
10602 | ||
aed64b35 L |
10603 | if (esdo->this_hdr.sh_type == SHT_REL |
10604 | || esdo->this_hdr.sh_type == SHT_RELA) | |
10605 | /* Some backends use reloc_count in relocation sections | |
10606 | to count particular types of relocs. Of course, | |
10607 | reloc sections themselves can't have relocations. */ | |
10608 | reloc_count = 0; | |
10609 | else if (info->relocatable || info->emitrelocations) | |
c152c796 AM |
10610 | reloc_count = sec->reloc_count; |
10611 | else if (bed->elf_backend_count_relocs) | |
58217f29 | 10612 | reloc_count = (*bed->elf_backend_count_relocs) (info, sec); |
c152c796 | 10613 | |
eea6121a AM |
10614 | if (sec->rawsize > max_contents_size) |
10615 | max_contents_size = sec->rawsize; | |
10616 | if (sec->size > max_contents_size) | |
10617 | max_contents_size = sec->size; | |
c152c796 AM |
10618 | |
10619 | /* We are interested in just local symbols, not all | |
10620 | symbols. */ | |
10621 | if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour | |
10622 | && (sec->owner->flags & DYNAMIC) == 0) | |
10623 | { | |
10624 | size_t sym_count; | |
10625 | ||
10626 | if (elf_bad_symtab (sec->owner)) | |
10627 | sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size | |
10628 | / bed->s->sizeof_sym); | |
10629 | else | |
10630 | sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info; | |
10631 | ||
10632 | if (sym_count > max_sym_count) | |
10633 | max_sym_count = sym_count; | |
10634 | ||
10635 | if (sym_count > max_sym_shndx_count | |
10636 | && elf_symtab_shndx (sec->owner) != 0) | |
10637 | max_sym_shndx_count = sym_count; | |
10638 | ||
10639 | if ((sec->flags & SEC_RELOC) != 0) | |
10640 | { | |
d4730f92 | 10641 | size_t ext_size = 0; |
c152c796 | 10642 | |
d4730f92 BS |
10643 | if (esdi->rel.hdr != NULL) |
10644 | ext_size = esdi->rel.hdr->sh_size; | |
10645 | if (esdi->rela.hdr != NULL) | |
10646 | ext_size += esdi->rela.hdr->sh_size; | |
7326c758 | 10647 | |
c152c796 AM |
10648 | if (ext_size > max_external_reloc_size) |
10649 | max_external_reloc_size = ext_size; | |
10650 | if (sec->reloc_count > max_internal_reloc_count) | |
10651 | max_internal_reloc_count = sec->reloc_count; | |
10652 | } | |
10653 | } | |
10654 | } | |
10655 | ||
10656 | if (reloc_count == 0) | |
10657 | continue; | |
10658 | ||
10659 | o->reloc_count += reloc_count; | |
10660 | ||
d4730f92 BS |
10661 | if (p->type == bfd_indirect_link_order |
10662 | && (info->relocatable || info->emitrelocations)) | |
c152c796 | 10663 | { |
d4730f92 BS |
10664 | if (esdi->rel.hdr) |
10665 | esdo->rel.count += NUM_SHDR_ENTRIES (esdi->rel.hdr); | |
10666 | if (esdi->rela.hdr) | |
10667 | esdo->rela.count += NUM_SHDR_ENTRIES (esdi->rela.hdr); | |
10668 | } | |
10669 | else | |
10670 | { | |
10671 | if (o->use_rela_p) | |
10672 | esdo->rela.count += reloc_count; | |
2c2b4ed4 | 10673 | else |
d4730f92 | 10674 | esdo->rel.count += reloc_count; |
c152c796 | 10675 | } |
c152c796 AM |
10676 | } |
10677 | ||
10678 | if (o->reloc_count > 0) | |
10679 | o->flags |= SEC_RELOC; | |
10680 | else | |
10681 | { | |
10682 | /* Explicitly clear the SEC_RELOC flag. The linker tends to | |
10683 | set it (this is probably a bug) and if it is set | |
10684 | assign_section_numbers will create a reloc section. */ | |
10685 | o->flags &=~ SEC_RELOC; | |
10686 | } | |
10687 | ||
10688 | /* If the SEC_ALLOC flag is not set, force the section VMA to | |
10689 | zero. This is done in elf_fake_sections as well, but forcing | |
10690 | the VMA to 0 here will ensure that relocs against these | |
10691 | sections are handled correctly. */ | |
10692 | if ((o->flags & SEC_ALLOC) == 0 | |
10693 | && ! o->user_set_vma) | |
10694 | o->vma = 0; | |
10695 | } | |
10696 | ||
10697 | if (! info->relocatable && merged) | |
10698 | elf_link_hash_traverse (elf_hash_table (info), | |
10699 | _bfd_elf_link_sec_merge_syms, abfd); | |
10700 | ||
10701 | /* Figure out the file positions for everything but the symbol table | |
10702 | and the relocs. We set symcount to force assign_section_numbers | |
10703 | to create a symbol table. */ | |
10704 | bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1; | |
10705 | BFD_ASSERT (! abfd->output_has_begun); | |
10706 | if (! _bfd_elf_compute_section_file_positions (abfd, info)) | |
10707 | goto error_return; | |
10708 | ||
ee75fd95 | 10709 | /* Set sizes, and assign file positions for reloc sections. */ |
c152c796 AM |
10710 | for (o = abfd->sections; o != NULL; o = o->next) |
10711 | { | |
d4730f92 | 10712 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
10713 | if ((o->flags & SEC_RELOC) != 0) |
10714 | { | |
d4730f92 BS |
10715 | if (esdo->rel.hdr |
10716 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rel))) | |
c152c796 AM |
10717 | goto error_return; |
10718 | ||
d4730f92 BS |
10719 | if (esdo->rela.hdr |
10720 | && !(_bfd_elf_link_size_reloc_section (abfd, &esdo->rela))) | |
c152c796 AM |
10721 | goto error_return; |
10722 | } | |
10723 | ||
10724 | /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them | |
10725 | to count upwards while actually outputting the relocations. */ | |
d4730f92 BS |
10726 | esdo->rel.count = 0; |
10727 | esdo->rela.count = 0; | |
c152c796 AM |
10728 | } |
10729 | ||
10730 | _bfd_elf_assign_file_positions_for_relocs (abfd); | |
10731 | ||
10732 | /* We have now assigned file positions for all the sections except | |
10733 | .symtab and .strtab. We start the .symtab section at the current | |
10734 | file position, and write directly to it. We build the .strtab | |
10735 | section in memory. */ | |
10736 | bfd_get_symcount (abfd) = 0; | |
10737 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
10738 | /* sh_name is set in prep_headers. */ | |
10739 | symtab_hdr->sh_type = SHT_SYMTAB; | |
10740 | /* sh_flags, sh_addr and sh_size all start off zero. */ | |
10741 | symtab_hdr->sh_entsize = bed->s->sizeof_sym; | |
10742 | /* sh_link is set in assign_section_numbers. */ | |
10743 | /* sh_info is set below. */ | |
10744 | /* sh_offset is set just below. */ | |
72de5009 | 10745 | symtab_hdr->sh_addralign = (bfd_vma) 1 << bed->s->log_file_align; |
c152c796 | 10746 | |
12bd6957 | 10747 | off = elf_next_file_pos (abfd); |
c152c796 AM |
10748 | off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, TRUE); |
10749 | ||
12bd6957 | 10750 | /* Note that at this point elf_next_file_pos (abfd) is |
c152c796 AM |
10751 | incorrect. We do not yet know the size of the .symtab section. |
10752 | We correct next_file_pos below, after we do know the size. */ | |
10753 | ||
10754 | /* Allocate a buffer to hold swapped out symbols. This is to avoid | |
10755 | continuously seeking to the right position in the file. */ | |
10756 | if (! info->keep_memory || max_sym_count < 20) | |
8b127cbc | 10757 | flinfo.symbuf_size = 20; |
c152c796 | 10758 | else |
8b127cbc AM |
10759 | flinfo.symbuf_size = max_sym_count; |
10760 | amt = flinfo.symbuf_size; | |
c152c796 | 10761 | amt *= bed->s->sizeof_sym; |
8b127cbc AM |
10762 | flinfo.symbuf = (bfd_byte *) bfd_malloc (amt); |
10763 | if (flinfo.symbuf == NULL) | |
c152c796 | 10764 | goto error_return; |
4fbb74a6 | 10765 | if (elf_numsections (abfd) > (SHN_LORESERVE & 0xFFFF)) |
c152c796 AM |
10766 | { |
10767 | /* Wild guess at number of output symbols. realloc'd as needed. */ | |
10768 | amt = 2 * max_sym_count + elf_numsections (abfd) + 1000; | |
8b127cbc | 10769 | flinfo.shndxbuf_size = amt; |
c152c796 | 10770 | amt *= sizeof (Elf_External_Sym_Shndx); |
8b127cbc AM |
10771 | flinfo.symshndxbuf = (Elf_External_Sym_Shndx *) bfd_zmalloc (amt); |
10772 | if (flinfo.symshndxbuf == NULL) | |
c152c796 AM |
10773 | goto error_return; |
10774 | } | |
10775 | ||
10776 | /* Start writing out the symbol table. The first symbol is always a | |
10777 | dummy symbol. */ | |
10778 | if (info->strip != strip_all | |
10779 | || emit_relocs) | |
10780 | { | |
10781 | elfsym.st_value = 0; | |
10782 | elfsym.st_size = 0; | |
10783 | elfsym.st_info = 0; | |
10784 | elfsym.st_other = 0; | |
10785 | elfsym.st_shndx = SHN_UNDEF; | |
35fc36a8 | 10786 | elfsym.st_target_internal = 0; |
8b127cbc | 10787 | if (elf_link_output_sym (&flinfo, NULL, &elfsym, bfd_und_section_ptr, |
6e0b88f1 | 10788 | NULL) != 1) |
c152c796 AM |
10789 | goto error_return; |
10790 | } | |
10791 | ||
c152c796 AM |
10792 | /* Output a symbol for each section. We output these even if we are |
10793 | discarding local symbols, since they are used for relocs. These | |
10794 | symbols have no names. We store the index of each one in the | |
10795 | index field of the section, so that we can find it again when | |
10796 | outputting relocs. */ | |
10797 | if (info->strip != strip_all | |
10798 | || emit_relocs) | |
10799 | { | |
10800 | elfsym.st_size = 0; | |
10801 | elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
10802 | elfsym.st_other = 0; | |
f0b5bb34 | 10803 | elfsym.st_value = 0; |
35fc36a8 | 10804 | elfsym.st_target_internal = 0; |
c152c796 AM |
10805 | for (i = 1; i < elf_numsections (abfd); i++) |
10806 | { | |
10807 | o = bfd_section_from_elf_index (abfd, i); | |
10808 | if (o != NULL) | |
f0b5bb34 AM |
10809 | { |
10810 | o->target_index = bfd_get_symcount (abfd); | |
10811 | elfsym.st_shndx = i; | |
10812 | if (!info->relocatable) | |
10813 | elfsym.st_value = o->vma; | |
8b127cbc | 10814 | if (elf_link_output_sym (&flinfo, NULL, &elfsym, o, NULL) != 1) |
f0b5bb34 AM |
10815 | goto error_return; |
10816 | } | |
c152c796 AM |
10817 | } |
10818 | } | |
10819 | ||
10820 | /* Allocate some memory to hold information read in from the input | |
10821 | files. */ | |
10822 | if (max_contents_size != 0) | |
10823 | { | |
8b127cbc AM |
10824 | flinfo.contents = (bfd_byte *) bfd_malloc (max_contents_size); |
10825 | if (flinfo.contents == NULL) | |
c152c796 AM |
10826 | goto error_return; |
10827 | } | |
10828 | ||
10829 | if (max_external_reloc_size != 0) | |
10830 | { | |
8b127cbc AM |
10831 | flinfo.external_relocs = bfd_malloc (max_external_reloc_size); |
10832 | if (flinfo.external_relocs == NULL) | |
c152c796 AM |
10833 | goto error_return; |
10834 | } | |
10835 | ||
10836 | if (max_internal_reloc_count != 0) | |
10837 | { | |
10838 | amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel; | |
10839 | amt *= sizeof (Elf_Internal_Rela); | |
8b127cbc AM |
10840 | flinfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt); |
10841 | if (flinfo.internal_relocs == NULL) | |
c152c796 AM |
10842 | goto error_return; |
10843 | } | |
10844 | ||
10845 | if (max_sym_count != 0) | |
10846 | { | |
10847 | amt = max_sym_count * bed->s->sizeof_sym; | |
8b127cbc AM |
10848 | flinfo.external_syms = (bfd_byte *) bfd_malloc (amt); |
10849 | if (flinfo.external_syms == NULL) | |
c152c796 AM |
10850 | goto error_return; |
10851 | ||
10852 | amt = max_sym_count * sizeof (Elf_Internal_Sym); | |
8b127cbc AM |
10853 | flinfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt); |
10854 | if (flinfo.internal_syms == NULL) | |
c152c796 AM |
10855 | goto error_return; |
10856 | ||
10857 | amt = max_sym_count * sizeof (long); | |
8b127cbc AM |
10858 | flinfo.indices = (long int *) bfd_malloc (amt); |
10859 | if (flinfo.indices == NULL) | |
c152c796 AM |
10860 | goto error_return; |
10861 | ||
10862 | amt = max_sym_count * sizeof (asection *); | |
8b127cbc AM |
10863 | flinfo.sections = (asection **) bfd_malloc (amt); |
10864 | if (flinfo.sections == NULL) | |
c152c796 AM |
10865 | goto error_return; |
10866 | } | |
10867 | ||
10868 | if (max_sym_shndx_count != 0) | |
10869 | { | |
10870 | amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx); | |
8b127cbc AM |
10871 | flinfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt); |
10872 | if (flinfo.locsym_shndx == NULL) | |
c152c796 AM |
10873 | goto error_return; |
10874 | } | |
10875 | ||
10876 | if (elf_hash_table (info)->tls_sec) | |
10877 | { | |
10878 | bfd_vma base, end = 0; | |
10879 | asection *sec; | |
10880 | ||
10881 | for (sec = elf_hash_table (info)->tls_sec; | |
10882 | sec && (sec->flags & SEC_THREAD_LOCAL); | |
10883 | sec = sec->next) | |
10884 | { | |
3a800eb9 | 10885 | bfd_size_type size = sec->size; |
c152c796 | 10886 | |
3a800eb9 AM |
10887 | if (size == 0 |
10888 | && (sec->flags & SEC_HAS_CONTENTS) == 0) | |
c152c796 | 10889 | { |
91d6fa6a NC |
10890 | struct bfd_link_order *ord = sec->map_tail.link_order; |
10891 | ||
10892 | if (ord != NULL) | |
10893 | size = ord->offset + ord->size; | |
c152c796 AM |
10894 | } |
10895 | end = sec->vma + size; | |
10896 | } | |
10897 | base = elf_hash_table (info)->tls_sec->vma; | |
7dc98aea RO |
10898 | /* Only align end of TLS section if static TLS doesn't have special |
10899 | alignment requirements. */ | |
10900 | if (bed->static_tls_alignment == 1) | |
10901 | end = align_power (end, | |
10902 | elf_hash_table (info)->tls_sec->alignment_power); | |
c152c796 AM |
10903 | elf_hash_table (info)->tls_size = end - base; |
10904 | } | |
10905 | ||
0b52efa6 PB |
10906 | /* Reorder SHF_LINK_ORDER sections. */ |
10907 | for (o = abfd->sections; o != NULL; o = o->next) | |
10908 | { | |
10909 | if (!elf_fixup_link_order (abfd, o)) | |
10910 | return FALSE; | |
10911 | } | |
10912 | ||
c152c796 AM |
10913 | /* Since ELF permits relocations to be against local symbols, we |
10914 | must have the local symbols available when we do the relocations. | |
10915 | Since we would rather only read the local symbols once, and we | |
10916 | would rather not keep them in memory, we handle all the | |
10917 | relocations for a single input file at the same time. | |
10918 | ||
10919 | Unfortunately, there is no way to know the total number of local | |
10920 | symbols until we have seen all of them, and the local symbol | |
10921 | indices precede the global symbol indices. This means that when | |
10922 | we are generating relocatable output, and we see a reloc against | |
10923 | a global symbol, we can not know the symbol index until we have | |
10924 | finished examining all the local symbols to see which ones we are | |
10925 | going to output. To deal with this, we keep the relocations in | |
10926 | memory, and don't output them until the end of the link. This is | |
10927 | an unfortunate waste of memory, but I don't see a good way around | |
10928 | it. Fortunately, it only happens when performing a relocatable | |
10929 | link, which is not the common case. FIXME: If keep_memory is set | |
10930 | we could write the relocs out and then read them again; I don't | |
10931 | know how bad the memory loss will be. */ | |
10932 | ||
10933 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
10934 | sub->output_has_begun = FALSE; | |
10935 | for (o = abfd->sections; o != NULL; o = o->next) | |
10936 | { | |
8423293d | 10937 | for (p = o->map_head.link_order; p != NULL; p = p->next) |
c152c796 AM |
10938 | { |
10939 | if (p->type == bfd_indirect_link_order | |
10940 | && (bfd_get_flavour ((sub = p->u.indirect.section->owner)) | |
10941 | == bfd_target_elf_flavour) | |
10942 | && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass) | |
10943 | { | |
10944 | if (! sub->output_has_begun) | |
10945 | { | |
8b127cbc | 10946 | if (! elf_link_input_bfd (&flinfo, sub)) |
c152c796 AM |
10947 | goto error_return; |
10948 | sub->output_has_begun = TRUE; | |
10949 | } | |
10950 | } | |
10951 | else if (p->type == bfd_section_reloc_link_order | |
10952 | || p->type == bfd_symbol_reloc_link_order) | |
10953 | { | |
10954 | if (! elf_reloc_link_order (abfd, info, o, p)) | |
10955 | goto error_return; | |
10956 | } | |
10957 | else | |
10958 | { | |
10959 | if (! _bfd_default_link_order (abfd, info, o, p)) | |
351f65ca L |
10960 | { |
10961 | if (p->type == bfd_indirect_link_order | |
10962 | && (bfd_get_flavour (sub) | |
10963 | == bfd_target_elf_flavour) | |
10964 | && (elf_elfheader (sub)->e_ident[EI_CLASS] | |
10965 | != bed->s->elfclass)) | |
10966 | { | |
10967 | const char *iclass, *oclass; | |
10968 | ||
10969 | if (bed->s->elfclass == ELFCLASS64) | |
10970 | { | |
10971 | iclass = "ELFCLASS32"; | |
10972 | oclass = "ELFCLASS64"; | |
10973 | } | |
10974 | else | |
10975 | { | |
10976 | iclass = "ELFCLASS64"; | |
10977 | oclass = "ELFCLASS32"; | |
10978 | } | |
10979 | ||
10980 | bfd_set_error (bfd_error_wrong_format); | |
10981 | (*_bfd_error_handler) | |
10982 | (_("%B: file class %s incompatible with %s"), | |
10983 | sub, iclass, oclass); | |
10984 | } | |
10985 | ||
10986 | goto error_return; | |
10987 | } | |
c152c796 AM |
10988 | } |
10989 | } | |
10990 | } | |
10991 | ||
c0f00686 L |
10992 | /* Free symbol buffer if needed. */ |
10993 | if (!info->reduce_memory_overheads) | |
10994 | { | |
10995 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
3fcd97f1 JJ |
10996 | if (bfd_get_flavour (sub) == bfd_target_elf_flavour |
10997 | && elf_tdata (sub)->symbuf) | |
c0f00686 L |
10998 | { |
10999 | free (elf_tdata (sub)->symbuf); | |
11000 | elf_tdata (sub)->symbuf = NULL; | |
11001 | } | |
11002 | } | |
11003 | ||
c152c796 AM |
11004 | /* Output any global symbols that got converted to local in a |
11005 | version script or due to symbol visibility. We do this in a | |
11006 | separate step since ELF requires all local symbols to appear | |
11007 | prior to any global symbols. FIXME: We should only do this if | |
11008 | some global symbols were, in fact, converted to become local. | |
11009 | FIXME: Will this work correctly with the Irix 5 linker? */ | |
11010 | eoinfo.failed = FALSE; | |
8b127cbc | 11011 | eoinfo.flinfo = &flinfo; |
c152c796 | 11012 | eoinfo.localsyms = TRUE; |
ffbc01cc AM |
11013 | eoinfo.need_second_pass = FALSE; |
11014 | eoinfo.second_pass = FALSE; | |
34a79995 | 11015 | eoinfo.file_sym_done = FALSE; |
7686d77d | 11016 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11017 | if (eoinfo.failed) |
11018 | return FALSE; | |
11019 | ||
ffbc01cc AM |
11020 | if (eoinfo.need_second_pass) |
11021 | { | |
11022 | eoinfo.second_pass = TRUE; | |
11023 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); | |
11024 | if (eoinfo.failed) | |
11025 | return FALSE; | |
11026 | } | |
11027 | ||
4e617b1e PB |
11028 | /* If backend needs to output some local symbols not present in the hash |
11029 | table, do it now. */ | |
11030 | if (bed->elf_backend_output_arch_local_syms) | |
11031 | { | |
6e0b88f1 | 11032 | typedef int (*out_sym_func) |
4e617b1e PB |
11033 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11034 | struct elf_link_hash_entry *); | |
11035 | ||
11036 | if (! ((*bed->elf_backend_output_arch_local_syms) | |
8b127cbc | 11037 | (abfd, info, &flinfo, (out_sym_func) elf_link_output_sym))) |
4e617b1e PB |
11038 | return FALSE; |
11039 | } | |
11040 | ||
c152c796 AM |
11041 | /* That wrote out all the local symbols. Finish up the symbol table |
11042 | with the global symbols. Even if we want to strip everything we | |
11043 | can, we still need to deal with those global symbols that got | |
11044 | converted to local in a version script. */ | |
11045 | ||
11046 | /* The sh_info field records the index of the first non local symbol. */ | |
11047 | symtab_hdr->sh_info = bfd_get_symcount (abfd); | |
11048 | ||
11049 | if (dynamic | |
8b127cbc AM |
11050 | && flinfo.dynsym_sec != NULL |
11051 | && flinfo.dynsym_sec->output_section != bfd_abs_section_ptr) | |
c152c796 AM |
11052 | { |
11053 | Elf_Internal_Sym sym; | |
8b127cbc | 11054 | bfd_byte *dynsym = flinfo.dynsym_sec->contents; |
c152c796 AM |
11055 | long last_local = 0; |
11056 | ||
11057 | /* Write out the section symbols for the output sections. */ | |
67687978 | 11058 | if (info->shared || elf_hash_table (info)->is_relocatable_executable) |
c152c796 AM |
11059 | { |
11060 | asection *s; | |
11061 | ||
11062 | sym.st_size = 0; | |
11063 | sym.st_name = 0; | |
11064 | sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); | |
11065 | sym.st_other = 0; | |
35fc36a8 | 11066 | sym.st_target_internal = 0; |
c152c796 AM |
11067 | |
11068 | for (s = abfd->sections; s != NULL; s = s->next) | |
11069 | { | |
11070 | int indx; | |
11071 | bfd_byte *dest; | |
11072 | long dynindx; | |
11073 | ||
c152c796 | 11074 | dynindx = elf_section_data (s)->dynindx; |
8c37241b JJ |
11075 | if (dynindx <= 0) |
11076 | continue; | |
11077 | indx = elf_section_data (s)->this_idx; | |
c152c796 AM |
11078 | BFD_ASSERT (indx > 0); |
11079 | sym.st_shndx = indx; | |
c0d5a53d L |
11080 | if (! check_dynsym (abfd, &sym)) |
11081 | return FALSE; | |
c152c796 AM |
11082 | sym.st_value = s->vma; |
11083 | dest = dynsym + dynindx * bed->s->sizeof_sym; | |
8c37241b JJ |
11084 | if (last_local < dynindx) |
11085 | last_local = dynindx; | |
c152c796 AM |
11086 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); |
11087 | } | |
c152c796 AM |
11088 | } |
11089 | ||
11090 | /* Write out the local dynsyms. */ | |
11091 | if (elf_hash_table (info)->dynlocal) | |
11092 | { | |
11093 | struct elf_link_local_dynamic_entry *e; | |
11094 | for (e = elf_hash_table (info)->dynlocal; e ; e = e->next) | |
11095 | { | |
11096 | asection *s; | |
11097 | bfd_byte *dest; | |
11098 | ||
935bd1e0 | 11099 | /* Copy the internal symbol and turn off visibility. |
c152c796 AM |
11100 | Note that we saved a word of storage and overwrote |
11101 | the original st_name with the dynstr_index. */ | |
11102 | sym = e->isym; | |
935bd1e0 | 11103 | sym.st_other &= ~ELF_ST_VISIBILITY (-1); |
c152c796 | 11104 | |
cb33740c AM |
11105 | s = bfd_section_from_elf_index (e->input_bfd, |
11106 | e->isym.st_shndx); | |
11107 | if (s != NULL) | |
c152c796 | 11108 | { |
c152c796 AM |
11109 | sym.st_shndx = |
11110 | elf_section_data (s->output_section)->this_idx; | |
c0d5a53d L |
11111 | if (! check_dynsym (abfd, &sym)) |
11112 | return FALSE; | |
c152c796 AM |
11113 | sym.st_value = (s->output_section->vma |
11114 | + s->output_offset | |
11115 | + e->isym.st_value); | |
11116 | } | |
11117 | ||
11118 | if (last_local < e->dynindx) | |
11119 | last_local = e->dynindx; | |
11120 | ||
11121 | dest = dynsym + e->dynindx * bed->s->sizeof_sym; | |
11122 | bed->s->swap_symbol_out (abfd, &sym, dest, 0); | |
11123 | } | |
11124 | } | |
11125 | ||
8b127cbc | 11126 | elf_section_data (flinfo.dynsym_sec->output_section)->this_hdr.sh_info = |
c152c796 AM |
11127 | last_local + 1; |
11128 | } | |
11129 | ||
11130 | /* We get the global symbols from the hash table. */ | |
11131 | eoinfo.failed = FALSE; | |
11132 | eoinfo.localsyms = FALSE; | |
8b127cbc | 11133 | eoinfo.flinfo = &flinfo; |
7686d77d | 11134 | bfd_hash_traverse (&info->hash->table, elf_link_output_extsym, &eoinfo); |
c152c796 AM |
11135 | if (eoinfo.failed) |
11136 | return FALSE; | |
11137 | ||
11138 | /* If backend needs to output some symbols not present in the hash | |
11139 | table, do it now. */ | |
11140 | if (bed->elf_backend_output_arch_syms) | |
11141 | { | |
6e0b88f1 | 11142 | typedef int (*out_sym_func) |
c152c796 AM |
11143 | (void *, const char *, Elf_Internal_Sym *, asection *, |
11144 | struct elf_link_hash_entry *); | |
11145 | ||
11146 | if (! ((*bed->elf_backend_output_arch_syms) | |
8b127cbc | 11147 | (abfd, info, &flinfo, (out_sym_func) elf_link_output_sym))) |
c152c796 AM |
11148 | return FALSE; |
11149 | } | |
11150 | ||
11151 | /* Flush all symbols to the file. */ | |
8b127cbc | 11152 | if (! elf_link_flush_output_syms (&flinfo, bed)) |
c152c796 AM |
11153 | return FALSE; |
11154 | ||
11155 | /* Now we know the size of the symtab section. */ | |
11156 | off += symtab_hdr->sh_size; | |
11157 | ||
11158 | symtab_shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr; | |
11159 | if (symtab_shndx_hdr->sh_name != 0) | |
11160 | { | |
11161 | symtab_shndx_hdr->sh_type = SHT_SYMTAB_SHNDX; | |
11162 | symtab_shndx_hdr->sh_entsize = sizeof (Elf_External_Sym_Shndx); | |
11163 | symtab_shndx_hdr->sh_addralign = sizeof (Elf_External_Sym_Shndx); | |
11164 | amt = bfd_get_symcount (abfd) * sizeof (Elf_External_Sym_Shndx); | |
11165 | symtab_shndx_hdr->sh_size = amt; | |
11166 | ||
11167 | off = _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr, | |
11168 | off, TRUE); | |
11169 | ||
11170 | if (bfd_seek (abfd, symtab_shndx_hdr->sh_offset, SEEK_SET) != 0 | |
8b127cbc | 11171 | || (bfd_bwrite (flinfo.symshndxbuf, amt, abfd) != amt)) |
c152c796 AM |
11172 | return FALSE; |
11173 | } | |
11174 | ||
11175 | ||
11176 | /* Finish up and write out the symbol string table (.strtab) | |
11177 | section. */ | |
11178 | symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr; | |
11179 | /* sh_name was set in prep_headers. */ | |
11180 | symstrtab_hdr->sh_type = SHT_STRTAB; | |
11181 | symstrtab_hdr->sh_flags = 0; | |
11182 | symstrtab_hdr->sh_addr = 0; | |
8b127cbc | 11183 | symstrtab_hdr->sh_size = _bfd_stringtab_size (flinfo.symstrtab); |
c152c796 AM |
11184 | symstrtab_hdr->sh_entsize = 0; |
11185 | symstrtab_hdr->sh_link = 0; | |
11186 | symstrtab_hdr->sh_info = 0; | |
11187 | /* sh_offset is set just below. */ | |
11188 | symstrtab_hdr->sh_addralign = 1; | |
11189 | ||
11190 | off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, TRUE); | |
12bd6957 | 11191 | elf_next_file_pos (abfd) = off; |
c152c796 AM |
11192 | |
11193 | if (bfd_get_symcount (abfd) > 0) | |
11194 | { | |
11195 | if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0 | |
8b127cbc | 11196 | || ! _bfd_stringtab_emit (abfd, flinfo.symstrtab)) |
c152c796 AM |
11197 | return FALSE; |
11198 | } | |
11199 | ||
11200 | /* Adjust the relocs to have the correct symbol indices. */ | |
11201 | for (o = abfd->sections; o != NULL; o = o->next) | |
11202 | { | |
d4730f92 | 11203 | struct bfd_elf_section_data *esdo = elf_section_data (o); |
c152c796 AM |
11204 | if ((o->flags & SEC_RELOC) == 0) |
11205 | continue; | |
11206 | ||
d4730f92 BS |
11207 | if (esdo->rel.hdr != NULL) |
11208 | elf_link_adjust_relocs (abfd, &esdo->rel); | |
11209 | if (esdo->rela.hdr != NULL) | |
11210 | elf_link_adjust_relocs (abfd, &esdo->rela); | |
c152c796 AM |
11211 | |
11212 | /* Set the reloc_count field to 0 to prevent write_relocs from | |
11213 | trying to swap the relocs out itself. */ | |
11214 | o->reloc_count = 0; | |
11215 | } | |
11216 | ||
11217 | if (dynamic && info->combreloc && dynobj != NULL) | |
11218 | relativecount = elf_link_sort_relocs (abfd, info, &reldyn); | |
11219 | ||
11220 | /* If we are linking against a dynamic object, or generating a | |
11221 | shared library, finish up the dynamic linking information. */ | |
11222 | if (dynamic) | |
11223 | { | |
11224 | bfd_byte *dyncon, *dynconend; | |
11225 | ||
11226 | /* Fix up .dynamic entries. */ | |
3d4d4302 | 11227 | o = bfd_get_linker_section (dynobj, ".dynamic"); |
c152c796 AM |
11228 | BFD_ASSERT (o != NULL); |
11229 | ||
11230 | dyncon = o->contents; | |
eea6121a | 11231 | dynconend = o->contents + o->size; |
c152c796 AM |
11232 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) |
11233 | { | |
11234 | Elf_Internal_Dyn dyn; | |
11235 | const char *name; | |
11236 | unsigned int type; | |
11237 | ||
11238 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11239 | ||
11240 | switch (dyn.d_tag) | |
11241 | { | |
11242 | default: | |
11243 | continue; | |
11244 | case DT_NULL: | |
11245 | if (relativecount > 0 && dyncon + bed->s->sizeof_dyn < dynconend) | |
11246 | { | |
11247 | switch (elf_section_data (reldyn)->this_hdr.sh_type) | |
11248 | { | |
11249 | case SHT_REL: dyn.d_tag = DT_RELCOUNT; break; | |
11250 | case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break; | |
11251 | default: continue; | |
11252 | } | |
11253 | dyn.d_un.d_val = relativecount; | |
11254 | relativecount = 0; | |
11255 | break; | |
11256 | } | |
11257 | continue; | |
11258 | ||
11259 | case DT_INIT: | |
11260 | name = info->init_function; | |
11261 | goto get_sym; | |
11262 | case DT_FINI: | |
11263 | name = info->fini_function; | |
11264 | get_sym: | |
11265 | { | |
11266 | struct elf_link_hash_entry *h; | |
11267 | ||
11268 | h = elf_link_hash_lookup (elf_hash_table (info), name, | |
11269 | FALSE, FALSE, TRUE); | |
11270 | if (h != NULL | |
11271 | && (h->root.type == bfd_link_hash_defined | |
11272 | || h->root.type == bfd_link_hash_defweak)) | |
11273 | { | |
bef26483 | 11274 | dyn.d_un.d_ptr = h->root.u.def.value; |
c152c796 AM |
11275 | o = h->root.u.def.section; |
11276 | if (o->output_section != NULL) | |
bef26483 | 11277 | dyn.d_un.d_ptr += (o->output_section->vma |
c152c796 AM |
11278 | + o->output_offset); |
11279 | else | |
11280 | { | |
11281 | /* The symbol is imported from another shared | |
11282 | library and does not apply to this one. */ | |
bef26483 | 11283 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11284 | } |
11285 | break; | |
11286 | } | |
11287 | } | |
11288 | continue; | |
11289 | ||
11290 | case DT_PREINIT_ARRAYSZ: | |
11291 | name = ".preinit_array"; | |
11292 | goto get_size; | |
11293 | case DT_INIT_ARRAYSZ: | |
11294 | name = ".init_array"; | |
11295 | goto get_size; | |
11296 | case DT_FINI_ARRAYSZ: | |
11297 | name = ".fini_array"; | |
11298 | get_size: | |
11299 | o = bfd_get_section_by_name (abfd, name); | |
11300 | if (o == NULL) | |
11301 | { | |
11302 | (*_bfd_error_handler) | |
d003868e | 11303 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11304 | goto error_return; |
11305 | } | |
eea6121a | 11306 | if (o->size == 0) |
c152c796 AM |
11307 | (*_bfd_error_handler) |
11308 | (_("warning: %s section has zero size"), name); | |
eea6121a | 11309 | dyn.d_un.d_val = o->size; |
c152c796 AM |
11310 | break; |
11311 | ||
11312 | case DT_PREINIT_ARRAY: | |
11313 | name = ".preinit_array"; | |
11314 | goto get_vma; | |
11315 | case DT_INIT_ARRAY: | |
11316 | name = ".init_array"; | |
11317 | goto get_vma; | |
11318 | case DT_FINI_ARRAY: | |
11319 | name = ".fini_array"; | |
11320 | goto get_vma; | |
11321 | ||
11322 | case DT_HASH: | |
11323 | name = ".hash"; | |
11324 | goto get_vma; | |
fdc90cb4 JJ |
11325 | case DT_GNU_HASH: |
11326 | name = ".gnu.hash"; | |
11327 | goto get_vma; | |
c152c796 AM |
11328 | case DT_STRTAB: |
11329 | name = ".dynstr"; | |
11330 | goto get_vma; | |
11331 | case DT_SYMTAB: | |
11332 | name = ".dynsym"; | |
11333 | goto get_vma; | |
11334 | case DT_VERDEF: | |
11335 | name = ".gnu.version_d"; | |
11336 | goto get_vma; | |
11337 | case DT_VERNEED: | |
11338 | name = ".gnu.version_r"; | |
11339 | goto get_vma; | |
11340 | case DT_VERSYM: | |
11341 | name = ".gnu.version"; | |
11342 | get_vma: | |
11343 | o = bfd_get_section_by_name (abfd, name); | |
11344 | if (o == NULL) | |
11345 | { | |
11346 | (*_bfd_error_handler) | |
d003868e | 11347 | (_("%B: could not find output section %s"), abfd, name); |
c152c796 AM |
11348 | goto error_return; |
11349 | } | |
894891db NC |
11350 | if (elf_section_data (o->output_section)->this_hdr.sh_type == SHT_NOTE) |
11351 | { | |
11352 | (*_bfd_error_handler) | |
11353 | (_("warning: section '%s' is being made into a note"), name); | |
11354 | bfd_set_error (bfd_error_nonrepresentable_section); | |
11355 | goto error_return; | |
11356 | } | |
c152c796 AM |
11357 | dyn.d_un.d_ptr = o->vma; |
11358 | break; | |
11359 | ||
11360 | case DT_REL: | |
11361 | case DT_RELA: | |
11362 | case DT_RELSZ: | |
11363 | case DT_RELASZ: | |
11364 | if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ) | |
11365 | type = SHT_REL; | |
11366 | else | |
11367 | type = SHT_RELA; | |
11368 | dyn.d_un.d_val = 0; | |
bef26483 | 11369 | dyn.d_un.d_ptr = 0; |
c152c796 AM |
11370 | for (i = 1; i < elf_numsections (abfd); i++) |
11371 | { | |
11372 | Elf_Internal_Shdr *hdr; | |
11373 | ||
11374 | hdr = elf_elfsections (abfd)[i]; | |
11375 | if (hdr->sh_type == type | |
11376 | && (hdr->sh_flags & SHF_ALLOC) != 0) | |
11377 | { | |
11378 | if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ) | |
11379 | dyn.d_un.d_val += hdr->sh_size; | |
11380 | else | |
11381 | { | |
bef26483 AM |
11382 | if (dyn.d_un.d_ptr == 0 |
11383 | || hdr->sh_addr < dyn.d_un.d_ptr) | |
11384 | dyn.d_un.d_ptr = hdr->sh_addr; | |
c152c796 AM |
11385 | } |
11386 | } | |
11387 | } | |
11388 | break; | |
11389 | } | |
11390 | bed->s->swap_dyn_out (dynobj, &dyn, dyncon); | |
11391 | } | |
11392 | } | |
11393 | ||
11394 | /* If we have created any dynamic sections, then output them. */ | |
11395 | if (dynobj != NULL) | |
11396 | { | |
11397 | if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info)) | |
11398 | goto error_return; | |
11399 | ||
943284cc | 11400 | /* Check for DT_TEXTREL (late, in case the backend removes it). */ |
be7b303d AM |
11401 | if (((info->warn_shared_textrel && info->shared) |
11402 | || info->error_textrel) | |
3d4d4302 | 11403 | && (o = bfd_get_linker_section (dynobj, ".dynamic")) != NULL) |
943284cc DJ |
11404 | { |
11405 | bfd_byte *dyncon, *dynconend; | |
11406 | ||
943284cc DJ |
11407 | dyncon = o->contents; |
11408 | dynconend = o->contents + o->size; | |
11409 | for (; dyncon < dynconend; dyncon += bed->s->sizeof_dyn) | |
11410 | { | |
11411 | Elf_Internal_Dyn dyn; | |
11412 | ||
11413 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
11414 | ||
11415 | if (dyn.d_tag == DT_TEXTREL) | |
11416 | { | |
c192a133 AM |
11417 | if (info->error_textrel) |
11418 | info->callbacks->einfo | |
11419 | (_("%P%X: read-only segment has dynamic relocations.\n")); | |
11420 | else | |
11421 | info->callbacks->einfo | |
11422 | (_("%P: warning: creating a DT_TEXTREL in a shared object.\n")); | |
943284cc DJ |
11423 | break; |
11424 | } | |
11425 | } | |
11426 | } | |
11427 | ||
c152c796 AM |
11428 | for (o = dynobj->sections; o != NULL; o = o->next) |
11429 | { | |
11430 | if ((o->flags & SEC_HAS_CONTENTS) == 0 | |
eea6121a | 11431 | || o->size == 0 |
c152c796 AM |
11432 | || o->output_section == bfd_abs_section_ptr) |
11433 | continue; | |
11434 | if ((o->flags & SEC_LINKER_CREATED) == 0) | |
11435 | { | |
11436 | /* At this point, we are only interested in sections | |
11437 | created by _bfd_elf_link_create_dynamic_sections. */ | |
11438 | continue; | |
11439 | } | |
3722b82f AM |
11440 | if (elf_hash_table (info)->stab_info.stabstr == o) |
11441 | continue; | |
eea6121a AM |
11442 | if (elf_hash_table (info)->eh_info.hdr_sec == o) |
11443 | continue; | |
3d4d4302 | 11444 | if (strcmp (o->name, ".dynstr") != 0) |
c152c796 | 11445 | { |
5dabe785 | 11446 | /* FIXME: octets_per_byte. */ |
c152c796 AM |
11447 | if (! bfd_set_section_contents (abfd, o->output_section, |
11448 | o->contents, | |
11449 | (file_ptr) o->output_offset, | |
eea6121a | 11450 | o->size)) |
c152c796 AM |
11451 | goto error_return; |
11452 | } | |
11453 | else | |
11454 | { | |
11455 | /* The contents of the .dynstr section are actually in a | |
11456 | stringtab. */ | |
11457 | off = elf_section_data (o->output_section)->this_hdr.sh_offset; | |
11458 | if (bfd_seek (abfd, off, SEEK_SET) != 0 | |
11459 | || ! _bfd_elf_strtab_emit (abfd, | |
11460 | elf_hash_table (info)->dynstr)) | |
11461 | goto error_return; | |
11462 | } | |
11463 | } | |
11464 | } | |
11465 | ||
11466 | if (info->relocatable) | |
11467 | { | |
11468 | bfd_boolean failed = FALSE; | |
11469 | ||
11470 | bfd_map_over_sections (abfd, bfd_elf_set_group_contents, &failed); | |
11471 | if (failed) | |
11472 | goto error_return; | |
11473 | } | |
11474 | ||
11475 | /* If we have optimized stabs strings, output them. */ | |
3722b82f | 11476 | if (elf_hash_table (info)->stab_info.stabstr != NULL) |
c152c796 AM |
11477 | { |
11478 | if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info)) | |
11479 | goto error_return; | |
11480 | } | |
11481 | ||
9f7c3e5e AM |
11482 | if (! _bfd_elf_write_section_eh_frame_hdr (abfd, info)) |
11483 | goto error_return; | |
c152c796 | 11484 | |
9f7c3e5e | 11485 | elf_final_link_free (abfd, &flinfo); |
c152c796 | 11486 | |
12bd6957 | 11487 | elf_linker (abfd) = TRUE; |
c152c796 | 11488 | |
104d59d1 JM |
11489 | if (attr_section) |
11490 | { | |
a50b1753 | 11491 | bfd_byte *contents = (bfd_byte *) bfd_malloc (attr_size); |
104d59d1 | 11492 | if (contents == NULL) |
d0f16d5e | 11493 | return FALSE; /* Bail out and fail. */ |
104d59d1 JM |
11494 | bfd_elf_set_obj_attr_contents (abfd, contents, attr_size); |
11495 | bfd_set_section_contents (abfd, attr_section, contents, 0, attr_size); | |
11496 | free (contents); | |
11497 | } | |
11498 | ||
c152c796 AM |
11499 | return TRUE; |
11500 | ||
11501 | error_return: | |
9f7c3e5e | 11502 | elf_final_link_free (abfd, &flinfo); |
c152c796 AM |
11503 | return FALSE; |
11504 | } | |
11505 | \f | |
5241d853 RS |
11506 | /* Initialize COOKIE for input bfd ABFD. */ |
11507 | ||
11508 | static bfd_boolean | |
11509 | init_reloc_cookie (struct elf_reloc_cookie *cookie, | |
11510 | struct bfd_link_info *info, bfd *abfd) | |
11511 | { | |
11512 | Elf_Internal_Shdr *symtab_hdr; | |
11513 | const struct elf_backend_data *bed; | |
11514 | ||
11515 | bed = get_elf_backend_data (abfd); | |
11516 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11517 | ||
11518 | cookie->abfd = abfd; | |
11519 | cookie->sym_hashes = elf_sym_hashes (abfd); | |
11520 | cookie->bad_symtab = elf_bad_symtab (abfd); | |
11521 | if (cookie->bad_symtab) | |
11522 | { | |
11523 | cookie->locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
11524 | cookie->extsymoff = 0; | |
11525 | } | |
11526 | else | |
11527 | { | |
11528 | cookie->locsymcount = symtab_hdr->sh_info; | |
11529 | cookie->extsymoff = symtab_hdr->sh_info; | |
11530 | } | |
11531 | ||
11532 | if (bed->s->arch_size == 32) | |
11533 | cookie->r_sym_shift = 8; | |
11534 | else | |
11535 | cookie->r_sym_shift = 32; | |
11536 | ||
11537 | cookie->locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
11538 | if (cookie->locsyms == NULL && cookie->locsymcount != 0) | |
11539 | { | |
11540 | cookie->locsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
11541 | cookie->locsymcount, 0, | |
11542 | NULL, NULL, NULL); | |
11543 | if (cookie->locsyms == NULL) | |
11544 | { | |
11545 | info->callbacks->einfo (_("%P%X: can not read symbols: %E\n")); | |
11546 | return FALSE; | |
11547 | } | |
11548 | if (info->keep_memory) | |
11549 | symtab_hdr->contents = (bfd_byte *) cookie->locsyms; | |
11550 | } | |
11551 | return TRUE; | |
11552 | } | |
11553 | ||
11554 | /* Free the memory allocated by init_reloc_cookie, if appropriate. */ | |
11555 | ||
11556 | static void | |
11557 | fini_reloc_cookie (struct elf_reloc_cookie *cookie, bfd *abfd) | |
11558 | { | |
11559 | Elf_Internal_Shdr *symtab_hdr; | |
11560 | ||
11561 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
11562 | if (cookie->locsyms != NULL | |
11563 | && symtab_hdr->contents != (unsigned char *) cookie->locsyms) | |
11564 | free (cookie->locsyms); | |
11565 | } | |
11566 | ||
11567 | /* Initialize the relocation information in COOKIE for input section SEC | |
11568 | of input bfd ABFD. */ | |
11569 | ||
11570 | static bfd_boolean | |
11571 | init_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
11572 | struct bfd_link_info *info, bfd *abfd, | |
11573 | asection *sec) | |
11574 | { | |
11575 | const struct elf_backend_data *bed; | |
11576 | ||
11577 | if (sec->reloc_count == 0) | |
11578 | { | |
11579 | cookie->rels = NULL; | |
11580 | cookie->relend = NULL; | |
11581 | } | |
11582 | else | |
11583 | { | |
11584 | bed = get_elf_backend_data (abfd); | |
11585 | ||
11586 | cookie->rels = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
11587 | info->keep_memory); | |
11588 | if (cookie->rels == NULL) | |
11589 | return FALSE; | |
11590 | cookie->rel = cookie->rels; | |
11591 | cookie->relend = (cookie->rels | |
11592 | + sec->reloc_count * bed->s->int_rels_per_ext_rel); | |
11593 | } | |
11594 | cookie->rel = cookie->rels; | |
11595 | return TRUE; | |
11596 | } | |
11597 | ||
11598 | /* Free the memory allocated by init_reloc_cookie_rels, | |
11599 | if appropriate. */ | |
11600 | ||
11601 | static void | |
11602 | fini_reloc_cookie_rels (struct elf_reloc_cookie *cookie, | |
11603 | asection *sec) | |
11604 | { | |
11605 | if (cookie->rels && elf_section_data (sec)->relocs != cookie->rels) | |
11606 | free (cookie->rels); | |
11607 | } | |
11608 | ||
11609 | /* Initialize the whole of COOKIE for input section SEC. */ | |
11610 | ||
11611 | static bfd_boolean | |
11612 | init_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
11613 | struct bfd_link_info *info, | |
11614 | asection *sec) | |
11615 | { | |
11616 | if (!init_reloc_cookie (cookie, info, sec->owner)) | |
11617 | goto error1; | |
11618 | if (!init_reloc_cookie_rels (cookie, info, sec->owner, sec)) | |
11619 | goto error2; | |
11620 | return TRUE; | |
11621 | ||
11622 | error2: | |
11623 | fini_reloc_cookie (cookie, sec->owner); | |
11624 | error1: | |
11625 | return FALSE; | |
11626 | } | |
11627 | ||
11628 | /* Free the memory allocated by init_reloc_cookie_for_section, | |
11629 | if appropriate. */ | |
11630 | ||
11631 | static void | |
11632 | fini_reloc_cookie_for_section (struct elf_reloc_cookie *cookie, | |
11633 | asection *sec) | |
11634 | { | |
11635 | fini_reloc_cookie_rels (cookie, sec); | |
11636 | fini_reloc_cookie (cookie, sec->owner); | |
11637 | } | |
11638 | \f | |
c152c796 AM |
11639 | /* Garbage collect unused sections. */ |
11640 | ||
07adf181 AM |
11641 | /* Default gc_mark_hook. */ |
11642 | ||
11643 | asection * | |
11644 | _bfd_elf_gc_mark_hook (asection *sec, | |
11645 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
11646 | Elf_Internal_Rela *rel ATTRIBUTE_UNUSED, | |
11647 | struct elf_link_hash_entry *h, | |
11648 | Elf_Internal_Sym *sym) | |
11649 | { | |
bde6f3eb L |
11650 | const char *sec_name; |
11651 | ||
07adf181 AM |
11652 | if (h != NULL) |
11653 | { | |
11654 | switch (h->root.type) | |
11655 | { | |
11656 | case bfd_link_hash_defined: | |
11657 | case bfd_link_hash_defweak: | |
11658 | return h->root.u.def.section; | |
11659 | ||
11660 | case bfd_link_hash_common: | |
11661 | return h->root.u.c.p->section; | |
11662 | ||
bde6f3eb L |
11663 | case bfd_link_hash_undefined: |
11664 | case bfd_link_hash_undefweak: | |
11665 | /* To work around a glibc bug, keep all XXX input sections | |
11666 | when there is an as yet undefined reference to __start_XXX | |
11667 | or __stop_XXX symbols. The linker will later define such | |
11668 | symbols for orphan input sections that have a name | |
11669 | representable as a C identifier. */ | |
11670 | if (strncmp (h->root.root.string, "__start_", 8) == 0) | |
11671 | sec_name = h->root.root.string + 8; | |
11672 | else if (strncmp (h->root.root.string, "__stop_", 7) == 0) | |
11673 | sec_name = h->root.root.string + 7; | |
11674 | else | |
11675 | sec_name = NULL; | |
11676 | ||
11677 | if (sec_name && *sec_name != '\0') | |
11678 | { | |
11679 | bfd *i; | |
68ffbac6 | 11680 | |
bde6f3eb L |
11681 | for (i = info->input_bfds; i; i = i->link_next) |
11682 | { | |
11683 | sec = bfd_get_section_by_name (i, sec_name); | |
11684 | if (sec) | |
11685 | sec->flags |= SEC_KEEP; | |
11686 | } | |
11687 | } | |
11688 | break; | |
11689 | ||
07adf181 AM |
11690 | default: |
11691 | break; | |
11692 | } | |
11693 | } | |
11694 | else | |
11695 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); | |
11696 | ||
11697 | return NULL; | |
11698 | } | |
11699 | ||
5241d853 RS |
11700 | /* COOKIE->rel describes a relocation against section SEC, which is |
11701 | a section we've decided to keep. Return the section that contains | |
11702 | the relocation symbol, or NULL if no section contains it. */ | |
11703 | ||
11704 | asection * | |
11705 | _bfd_elf_gc_mark_rsec (struct bfd_link_info *info, asection *sec, | |
11706 | elf_gc_mark_hook_fn gc_mark_hook, | |
11707 | struct elf_reloc_cookie *cookie) | |
11708 | { | |
11709 | unsigned long r_symndx; | |
11710 | struct elf_link_hash_entry *h; | |
11711 | ||
11712 | r_symndx = cookie->rel->r_info >> cookie->r_sym_shift; | |
cf35638d | 11713 | if (r_symndx == STN_UNDEF) |
5241d853 RS |
11714 | return NULL; |
11715 | ||
11716 | if (r_symndx >= cookie->locsymcount | |
11717 | || ELF_ST_BIND (cookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
11718 | { | |
11719 | h = cookie->sym_hashes[r_symndx - cookie->extsymoff]; | |
11720 | while (h->root.type == bfd_link_hash_indirect | |
11721 | || h->root.type == bfd_link_hash_warning) | |
11722 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1d5316ab | 11723 | h->mark = 1; |
4e6b54a6 AM |
11724 | /* If this symbol is weak and there is a non-weak definition, we |
11725 | keep the non-weak definition because many backends put | |
11726 | dynamic reloc info on the non-weak definition for code | |
11727 | handling copy relocs. */ | |
11728 | if (h->u.weakdef != NULL) | |
11729 | h->u.weakdef->mark = 1; | |
5241d853 RS |
11730 | return (*gc_mark_hook) (sec, info, cookie->rel, h, NULL); |
11731 | } | |
11732 | ||
11733 | return (*gc_mark_hook) (sec, info, cookie->rel, NULL, | |
11734 | &cookie->locsyms[r_symndx]); | |
11735 | } | |
11736 | ||
11737 | /* COOKIE->rel describes a relocation against section SEC, which is | |
11738 | a section we've decided to keep. Mark the section that contains | |
9d0a14d3 | 11739 | the relocation symbol. */ |
5241d853 RS |
11740 | |
11741 | bfd_boolean | |
11742 | _bfd_elf_gc_mark_reloc (struct bfd_link_info *info, | |
11743 | asection *sec, | |
11744 | elf_gc_mark_hook_fn gc_mark_hook, | |
9d0a14d3 | 11745 | struct elf_reloc_cookie *cookie) |
5241d853 RS |
11746 | { |
11747 | asection *rsec; | |
11748 | ||
11749 | rsec = _bfd_elf_gc_mark_rsec (info, sec, gc_mark_hook, cookie); | |
11750 | if (rsec && !rsec->gc_mark) | |
11751 | { | |
a66eed7a AM |
11752 | if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour |
11753 | || (rsec->owner->flags & DYNAMIC) != 0) | |
5241d853 | 11754 | rsec->gc_mark = 1; |
5241d853 RS |
11755 | else if (!_bfd_elf_gc_mark (info, rsec, gc_mark_hook)) |
11756 | return FALSE; | |
11757 | } | |
11758 | return TRUE; | |
11759 | } | |
11760 | ||
07adf181 AM |
11761 | /* The mark phase of garbage collection. For a given section, mark |
11762 | it and any sections in this section's group, and all the sections | |
11763 | which define symbols to which it refers. */ | |
11764 | ||
ccfa59ea AM |
11765 | bfd_boolean |
11766 | _bfd_elf_gc_mark (struct bfd_link_info *info, | |
11767 | asection *sec, | |
6a5bb875 | 11768 | elf_gc_mark_hook_fn gc_mark_hook) |
c152c796 AM |
11769 | { |
11770 | bfd_boolean ret; | |
9d0a14d3 | 11771 | asection *group_sec, *eh_frame; |
c152c796 AM |
11772 | |
11773 | sec->gc_mark = 1; | |
11774 | ||
11775 | /* Mark all the sections in the group. */ | |
11776 | group_sec = elf_section_data (sec)->next_in_group; | |
11777 | if (group_sec && !group_sec->gc_mark) | |
ccfa59ea | 11778 | if (!_bfd_elf_gc_mark (info, group_sec, gc_mark_hook)) |
c152c796 AM |
11779 | return FALSE; |
11780 | ||
11781 | /* Look through the section relocs. */ | |
11782 | ret = TRUE; | |
9d0a14d3 RS |
11783 | eh_frame = elf_eh_frame_section (sec->owner); |
11784 | if ((sec->flags & SEC_RELOC) != 0 | |
11785 | && sec->reloc_count > 0 | |
11786 | && sec != eh_frame) | |
c152c796 | 11787 | { |
5241d853 | 11788 | struct elf_reloc_cookie cookie; |
c152c796 | 11789 | |
5241d853 RS |
11790 | if (!init_reloc_cookie_for_section (&cookie, info, sec)) |
11791 | ret = FALSE; | |
c152c796 | 11792 | else |
c152c796 | 11793 | { |
5241d853 | 11794 | for (; cookie.rel < cookie.relend; cookie.rel++) |
9d0a14d3 | 11795 | if (!_bfd_elf_gc_mark_reloc (info, sec, gc_mark_hook, &cookie)) |
5241d853 RS |
11796 | { |
11797 | ret = FALSE; | |
11798 | break; | |
11799 | } | |
11800 | fini_reloc_cookie_for_section (&cookie, sec); | |
c152c796 AM |
11801 | } |
11802 | } | |
9d0a14d3 RS |
11803 | |
11804 | if (ret && eh_frame && elf_fde_list (sec)) | |
11805 | { | |
11806 | struct elf_reloc_cookie cookie; | |
11807 | ||
11808 | if (!init_reloc_cookie_for_section (&cookie, info, eh_frame)) | |
11809 | ret = FALSE; | |
11810 | else | |
11811 | { | |
11812 | if (!_bfd_elf_gc_mark_fdes (info, sec, eh_frame, | |
11813 | gc_mark_hook, &cookie)) | |
11814 | ret = FALSE; | |
11815 | fini_reloc_cookie_for_section (&cookie, eh_frame); | |
11816 | } | |
11817 | } | |
11818 | ||
c152c796 AM |
11819 | return ret; |
11820 | } | |
11821 | ||
7f6ab9f8 AM |
11822 | /* Keep debug and special sections. */ |
11823 | ||
11824 | bfd_boolean | |
11825 | _bfd_elf_gc_mark_extra_sections (struct bfd_link_info *info, | |
11826 | elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED) | |
11827 | { | |
11828 | bfd *ibfd; | |
11829 | ||
11830 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
11831 | { | |
11832 | asection *isec; | |
11833 | bfd_boolean some_kept; | |
b40bf0a2 | 11834 | bfd_boolean debug_frag_seen; |
7f6ab9f8 AM |
11835 | |
11836 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
11837 | continue; | |
11838 | ||
b40bf0a2 NC |
11839 | /* Ensure all linker created sections are kept, |
11840 | see if any other section is already marked, | |
11841 | and note if we have any fragmented debug sections. */ | |
11842 | debug_frag_seen = some_kept = FALSE; | |
7f6ab9f8 AM |
11843 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
11844 | { | |
11845 | if ((isec->flags & SEC_LINKER_CREATED) != 0) | |
11846 | isec->gc_mark = 1; | |
11847 | else if (isec->gc_mark) | |
11848 | some_kept = TRUE; | |
b40bf0a2 NC |
11849 | |
11850 | if (debug_frag_seen == FALSE | |
11851 | && (isec->flags & SEC_DEBUGGING) | |
11852 | && CONST_STRNEQ (isec->name, ".debug_line.")) | |
11853 | debug_frag_seen = TRUE; | |
7f6ab9f8 AM |
11854 | } |
11855 | ||
11856 | /* If no section in this file will be kept, then we can | |
b40bf0a2 | 11857 | toss out the debug and special sections. */ |
7f6ab9f8 AM |
11858 | if (!some_kept) |
11859 | continue; | |
11860 | ||
11861 | /* Keep debug and special sections like .comment when they are | |
c227efa6 | 11862 | not part of a group, or when we have single-member groups. */ |
7f6ab9f8 | 11863 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) |
c227efa6 AM |
11864 | if ((elf_next_in_group (isec) == NULL |
11865 | || elf_next_in_group (isec) == isec) | |
7f6ab9f8 AM |
11866 | && ((isec->flags & SEC_DEBUGGING) != 0 |
11867 | || (isec->flags & (SEC_ALLOC | SEC_LOAD | SEC_RELOC)) == 0)) | |
11868 | isec->gc_mark = 1; | |
b40bf0a2 NC |
11869 | |
11870 | if (! debug_frag_seen) | |
11871 | continue; | |
11872 | ||
11873 | /* Look for CODE sections which are going to be discarded, | |
11874 | and find and discard any fragmented debug sections which | |
11875 | are associated with that code section. */ | |
11876 | for (isec = ibfd->sections; isec != NULL; isec = isec->next) | |
11877 | if ((isec->flags & SEC_CODE) != 0 | |
11878 | && isec->gc_mark == 0) | |
11879 | { | |
11880 | unsigned int ilen; | |
11881 | asection *dsec; | |
11882 | ||
11883 | ilen = strlen (isec->name); | |
11884 | ||
11885 | /* Association is determined by the name of the debug section | |
11886 | containing the name of the code section as a suffix. For | |
11887 | example .debug_line.text.foo is a debug section associated | |
11888 | with .text.foo. */ | |
11889 | for (dsec = ibfd->sections; dsec != NULL; dsec = dsec->next) | |
11890 | { | |
11891 | unsigned int dlen; | |
11892 | ||
11893 | if (dsec->gc_mark == 0 | |
11894 | || (dsec->flags & SEC_DEBUGGING) == 0) | |
11895 | continue; | |
11896 | ||
11897 | dlen = strlen (dsec->name); | |
11898 | ||
11899 | if (dlen > ilen | |
11900 | && strncmp (dsec->name + (dlen - ilen), | |
11901 | isec->name, ilen) == 0) | |
11902 | { | |
11903 | dsec->gc_mark = 0; | |
11904 | break; | |
11905 | } | |
11906 | } | |
11907 | } | |
7f6ab9f8 AM |
11908 | } |
11909 | return TRUE; | |
11910 | } | |
11911 | ||
c152c796 AM |
11912 | /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */ |
11913 | ||
c17d87de NC |
11914 | struct elf_gc_sweep_symbol_info |
11915 | { | |
ccabcbe5 AM |
11916 | struct bfd_link_info *info; |
11917 | void (*hide_symbol) (struct bfd_link_info *, struct elf_link_hash_entry *, | |
11918 | bfd_boolean); | |
11919 | }; | |
11920 | ||
c152c796 | 11921 | static bfd_boolean |
ccabcbe5 | 11922 | elf_gc_sweep_symbol (struct elf_link_hash_entry *h, void *data) |
c152c796 | 11923 | { |
1d5316ab AM |
11924 | if (!h->mark |
11925 | && (((h->root.type == bfd_link_hash_defined | |
11926 | || h->root.type == bfd_link_hash_defweak) | |
6673f753 AM |
11927 | && !(h->def_regular |
11928 | && h->root.u.def.section->gc_mark)) | |
1d5316ab AM |
11929 | || h->root.type == bfd_link_hash_undefined |
11930 | || h->root.type == bfd_link_hash_undefweak)) | |
11931 | { | |
11932 | struct elf_gc_sweep_symbol_info *inf; | |
11933 | ||
11934 | inf = (struct elf_gc_sweep_symbol_info *) data; | |
ccabcbe5 | 11935 | (*inf->hide_symbol) (inf->info, h, TRUE); |
1d5316ab AM |
11936 | h->def_regular = 0; |
11937 | h->ref_regular = 0; | |
11938 | h->ref_regular_nonweak = 0; | |
ccabcbe5 | 11939 | } |
c152c796 AM |
11940 | |
11941 | return TRUE; | |
11942 | } | |
11943 | ||
11944 | /* The sweep phase of garbage collection. Remove all garbage sections. */ | |
11945 | ||
11946 | typedef bfd_boolean (*gc_sweep_hook_fn) | |
11947 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); | |
11948 | ||
11949 | static bfd_boolean | |
ccabcbe5 | 11950 | elf_gc_sweep (bfd *abfd, struct bfd_link_info *info) |
c152c796 AM |
11951 | { |
11952 | bfd *sub; | |
ccabcbe5 AM |
11953 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
11954 | gc_sweep_hook_fn gc_sweep_hook = bed->gc_sweep_hook; | |
11955 | unsigned long section_sym_count; | |
11956 | struct elf_gc_sweep_symbol_info sweep_info; | |
c152c796 AM |
11957 | |
11958 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
11959 | { | |
11960 | asection *o; | |
11961 | ||
11962 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
11963 | continue; | |
11964 | ||
11965 | for (o = sub->sections; o != NULL; o = o->next) | |
11966 | { | |
a33dafc3 L |
11967 | /* When any section in a section group is kept, we keep all |
11968 | sections in the section group. If the first member of | |
11969 | the section group is excluded, we will also exclude the | |
11970 | group section. */ | |
11971 | if (o->flags & SEC_GROUP) | |
11972 | { | |
11973 | asection *first = elf_next_in_group (o); | |
11974 | o->gc_mark = first->gc_mark; | |
11975 | } | |
c152c796 AM |
11976 | |
11977 | if (o->gc_mark) | |
11978 | continue; | |
11979 | ||
11980 | /* Skip sweeping sections already excluded. */ | |
11981 | if (o->flags & SEC_EXCLUDE) | |
11982 | continue; | |
11983 | ||
11984 | /* Since this is early in the link process, it is simple | |
11985 | to remove a section from the output. */ | |
11986 | o->flags |= SEC_EXCLUDE; | |
11987 | ||
c55fe096 | 11988 | if (info->print_gc_sections && o->size != 0) |
c17d87de NC |
11989 | _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub, o->name); |
11990 | ||
c152c796 AM |
11991 | /* But we also have to update some of the relocation |
11992 | info we collected before. */ | |
11993 | if (gc_sweep_hook | |
e8aaee2a | 11994 | && (o->flags & SEC_RELOC) != 0 |
9850436d AM |
11995 | && o->reloc_count != 0 |
11996 | && !((info->strip == strip_all || info->strip == strip_debugger) | |
11997 | && (o->flags & SEC_DEBUGGING) != 0) | |
e8aaee2a | 11998 | && !bfd_is_abs_section (o->output_section)) |
c152c796 AM |
11999 | { |
12000 | Elf_Internal_Rela *internal_relocs; | |
12001 | bfd_boolean r; | |
12002 | ||
12003 | internal_relocs | |
12004 | = _bfd_elf_link_read_relocs (o->owner, o, NULL, NULL, | |
12005 | info->keep_memory); | |
12006 | if (internal_relocs == NULL) | |
12007 | return FALSE; | |
12008 | ||
12009 | r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs); | |
12010 | ||
12011 | if (elf_section_data (o)->relocs != internal_relocs) | |
12012 | free (internal_relocs); | |
12013 | ||
12014 | if (!r) | |
12015 | return FALSE; | |
12016 | } | |
12017 | } | |
12018 | } | |
12019 | ||
12020 | /* Remove the symbols that were in the swept sections from the dynamic | |
12021 | symbol table. GCFIXME: Anyone know how to get them out of the | |
12022 | static symbol table as well? */ | |
ccabcbe5 AM |
12023 | sweep_info.info = info; |
12024 | sweep_info.hide_symbol = bed->elf_backend_hide_symbol; | |
12025 | elf_link_hash_traverse (elf_hash_table (info), elf_gc_sweep_symbol, | |
12026 | &sweep_info); | |
c152c796 | 12027 | |
ccabcbe5 | 12028 | _bfd_elf_link_renumber_dynsyms (abfd, info, §ion_sym_count); |
c152c796 AM |
12029 | return TRUE; |
12030 | } | |
12031 | ||
12032 | /* Propagate collected vtable information. This is called through | |
12033 | elf_link_hash_traverse. */ | |
12034 | ||
12035 | static bfd_boolean | |
12036 | elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry *h, void *okp) | |
12037 | { | |
c152c796 | 12038 | /* Those that are not vtables. */ |
f6e332e6 | 12039 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12040 | return TRUE; |
12041 | ||
12042 | /* Those vtables that do not have parents, we cannot merge. */ | |
f6e332e6 | 12043 | if (h->vtable->parent == (struct elf_link_hash_entry *) -1) |
c152c796 AM |
12044 | return TRUE; |
12045 | ||
12046 | /* If we've already been done, exit. */ | |
f6e332e6 | 12047 | if (h->vtable->used && h->vtable->used[-1]) |
c152c796 AM |
12048 | return TRUE; |
12049 | ||
12050 | /* Make sure the parent's table is up to date. */ | |
f6e332e6 | 12051 | elf_gc_propagate_vtable_entries_used (h->vtable->parent, okp); |
c152c796 | 12052 | |
f6e332e6 | 12053 | if (h->vtable->used == NULL) |
c152c796 AM |
12054 | { |
12055 | /* None of this table's entries were referenced. Re-use the | |
12056 | parent's table. */ | |
f6e332e6 AM |
12057 | h->vtable->used = h->vtable->parent->vtable->used; |
12058 | h->vtable->size = h->vtable->parent->vtable->size; | |
c152c796 AM |
12059 | } |
12060 | else | |
12061 | { | |
12062 | size_t n; | |
12063 | bfd_boolean *cu, *pu; | |
12064 | ||
12065 | /* Or the parent's entries into ours. */ | |
f6e332e6 | 12066 | cu = h->vtable->used; |
c152c796 | 12067 | cu[-1] = TRUE; |
f6e332e6 | 12068 | pu = h->vtable->parent->vtable->used; |
c152c796 AM |
12069 | if (pu != NULL) |
12070 | { | |
12071 | const struct elf_backend_data *bed; | |
12072 | unsigned int log_file_align; | |
12073 | ||
12074 | bed = get_elf_backend_data (h->root.u.def.section->owner); | |
12075 | log_file_align = bed->s->log_file_align; | |
f6e332e6 | 12076 | n = h->vtable->parent->vtable->size >> log_file_align; |
c152c796 AM |
12077 | while (n--) |
12078 | { | |
12079 | if (*pu) | |
12080 | *cu = TRUE; | |
12081 | pu++; | |
12082 | cu++; | |
12083 | } | |
12084 | } | |
12085 | } | |
12086 | ||
12087 | return TRUE; | |
12088 | } | |
12089 | ||
12090 | static bfd_boolean | |
12091 | elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry *h, void *okp) | |
12092 | { | |
12093 | asection *sec; | |
12094 | bfd_vma hstart, hend; | |
12095 | Elf_Internal_Rela *relstart, *relend, *rel; | |
12096 | const struct elf_backend_data *bed; | |
12097 | unsigned int log_file_align; | |
12098 | ||
c152c796 AM |
12099 | /* Take care of both those symbols that do not describe vtables as |
12100 | well as those that are not loaded. */ | |
f6e332e6 | 12101 | if (h->vtable == NULL || h->vtable->parent == NULL) |
c152c796 AM |
12102 | return TRUE; |
12103 | ||
12104 | BFD_ASSERT (h->root.type == bfd_link_hash_defined | |
12105 | || h->root.type == bfd_link_hash_defweak); | |
12106 | ||
12107 | sec = h->root.u.def.section; | |
12108 | hstart = h->root.u.def.value; | |
12109 | hend = hstart + h->size; | |
12110 | ||
12111 | relstart = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL, TRUE); | |
12112 | if (!relstart) | |
12113 | return *(bfd_boolean *) okp = FALSE; | |
12114 | bed = get_elf_backend_data (sec->owner); | |
12115 | log_file_align = bed->s->log_file_align; | |
12116 | ||
12117 | relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel; | |
12118 | ||
12119 | for (rel = relstart; rel < relend; ++rel) | |
12120 | if (rel->r_offset >= hstart && rel->r_offset < hend) | |
12121 | { | |
12122 | /* If the entry is in use, do nothing. */ | |
f6e332e6 AM |
12123 | if (h->vtable->used |
12124 | && (rel->r_offset - hstart) < h->vtable->size) | |
c152c796 AM |
12125 | { |
12126 | bfd_vma entry = (rel->r_offset - hstart) >> log_file_align; | |
f6e332e6 | 12127 | if (h->vtable->used[entry]) |
c152c796 AM |
12128 | continue; |
12129 | } | |
12130 | /* Otherwise, kill it. */ | |
12131 | rel->r_offset = rel->r_info = rel->r_addend = 0; | |
12132 | } | |
12133 | ||
12134 | return TRUE; | |
12135 | } | |
12136 | ||
87538722 AM |
12137 | /* Mark sections containing dynamically referenced symbols. When |
12138 | building shared libraries, we must assume that any visible symbol is | |
12139 | referenced. */ | |
715df9b8 | 12140 | |
64d03ab5 AM |
12141 | bfd_boolean |
12142 | bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry *h, void *inf) | |
715df9b8 | 12143 | { |
87538722 | 12144 | struct bfd_link_info *info = (struct bfd_link_info *) inf; |
d6f6f455 | 12145 | struct bfd_elf_dynamic_list *d = info->dynamic_list; |
87538722 | 12146 | |
715df9b8 EB |
12147 | if ((h->root.type == bfd_link_hash_defined |
12148 | || h->root.type == bfd_link_hash_defweak) | |
87538722 | 12149 | && (h->ref_dynamic |
b407645f | 12150 | || (h->def_regular |
87538722 | 12151 | && ELF_ST_VISIBILITY (h->other) != STV_INTERNAL |
fd91d419 | 12152 | && ELF_ST_VISIBILITY (h->other) != STV_HIDDEN |
b407645f AM |
12153 | && (!info->executable |
12154 | || info->export_dynamic | |
12155 | || (h->dynamic | |
12156 | && d != NULL | |
12157 | && (*d->match) (&d->head, NULL, h->root.root.string))) | |
54e8959c L |
12158 | && (strchr (h->root.root.string, ELF_VER_CHR) != NULL |
12159 | || !bfd_hide_sym_by_version (info->version_info, | |
12160 | h->root.root.string))))) | |
715df9b8 EB |
12161 | h->root.u.def.section->flags |= SEC_KEEP; |
12162 | ||
12163 | return TRUE; | |
12164 | } | |
3b36f7e6 | 12165 | |
74f0fb50 AM |
12166 | /* Keep all sections containing symbols undefined on the command-line, |
12167 | and the section containing the entry symbol. */ | |
12168 | ||
12169 | void | |
12170 | _bfd_elf_gc_keep (struct bfd_link_info *info) | |
12171 | { | |
12172 | struct bfd_sym_chain *sym; | |
12173 | ||
12174 | for (sym = info->gc_sym_list; sym != NULL; sym = sym->next) | |
12175 | { | |
12176 | struct elf_link_hash_entry *h; | |
12177 | ||
12178 | h = elf_link_hash_lookup (elf_hash_table (info), sym->name, | |
12179 | FALSE, FALSE, FALSE); | |
12180 | ||
12181 | if (h != NULL | |
12182 | && (h->root.type == bfd_link_hash_defined | |
12183 | || h->root.type == bfd_link_hash_defweak) | |
12184 | && !bfd_is_abs_section (h->root.u.def.section)) | |
12185 | h->root.u.def.section->flags |= SEC_KEEP; | |
12186 | } | |
12187 | } | |
12188 | ||
c152c796 AM |
12189 | /* Do mark and sweep of unused sections. */ |
12190 | ||
12191 | bfd_boolean | |
12192 | bfd_elf_gc_sections (bfd *abfd, struct bfd_link_info *info) | |
12193 | { | |
12194 | bfd_boolean ok = TRUE; | |
12195 | bfd *sub; | |
6a5bb875 | 12196 | elf_gc_mark_hook_fn gc_mark_hook; |
64d03ab5 | 12197 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
c152c796 | 12198 | |
64d03ab5 | 12199 | if (!bed->can_gc_sections |
715df9b8 | 12200 | || !is_elf_hash_table (info->hash)) |
c152c796 AM |
12201 | { |
12202 | (*_bfd_error_handler)(_("Warning: gc-sections option ignored")); | |
12203 | return TRUE; | |
12204 | } | |
12205 | ||
74f0fb50 AM |
12206 | bed->gc_keep (info); |
12207 | ||
9d0a14d3 RS |
12208 | /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section |
12209 | at the .eh_frame section if we can mark the FDEs individually. */ | |
12210 | _bfd_elf_begin_eh_frame_parsing (info); | |
12211 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) | |
12212 | { | |
12213 | asection *sec; | |
12214 | struct elf_reloc_cookie cookie; | |
12215 | ||
12216 | sec = bfd_get_section_by_name (sub, ".eh_frame"); | |
9a2a56cc | 12217 | while (sec && init_reloc_cookie_for_section (&cookie, info, sec)) |
9d0a14d3 RS |
12218 | { |
12219 | _bfd_elf_parse_eh_frame (sub, info, sec, &cookie); | |
9a2a56cc AM |
12220 | if (elf_section_data (sec)->sec_info |
12221 | && (sec->flags & SEC_LINKER_CREATED) == 0) | |
9d0a14d3 RS |
12222 | elf_eh_frame_section (sub) = sec; |
12223 | fini_reloc_cookie_for_section (&cookie, sec); | |
9a2a56cc | 12224 | sec = bfd_get_next_section_by_name (sec); |
9d0a14d3 RS |
12225 | } |
12226 | } | |
12227 | _bfd_elf_end_eh_frame_parsing (info); | |
12228 | ||
c152c796 AM |
12229 | /* Apply transitive closure to the vtable entry usage info. */ |
12230 | elf_link_hash_traverse (elf_hash_table (info), | |
12231 | elf_gc_propagate_vtable_entries_used, | |
12232 | &ok); | |
12233 | if (!ok) | |
12234 | return FALSE; | |
12235 | ||
12236 | /* Kill the vtable relocations that were not used. */ | |
12237 | elf_link_hash_traverse (elf_hash_table (info), | |
12238 | elf_gc_smash_unused_vtentry_relocs, | |
12239 | &ok); | |
12240 | if (!ok) | |
12241 | return FALSE; | |
12242 | ||
715df9b8 EB |
12243 | /* Mark dynamically referenced symbols. */ |
12244 | if (elf_hash_table (info)->dynamic_sections_created) | |
12245 | elf_link_hash_traverse (elf_hash_table (info), | |
64d03ab5 | 12246 | bed->gc_mark_dynamic_ref, |
87538722 | 12247 | info); |
c152c796 | 12248 | |
715df9b8 | 12249 | /* Grovel through relocs to find out who stays ... */ |
64d03ab5 | 12250 | gc_mark_hook = bed->gc_mark_hook; |
c152c796 AM |
12251 | for (sub = info->input_bfds; sub != NULL; sub = sub->link_next) |
12252 | { | |
12253 | asection *o; | |
12254 | ||
12255 | if (bfd_get_flavour (sub) != bfd_target_elf_flavour) | |
12256 | continue; | |
12257 | ||
7f6ab9f8 AM |
12258 | /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep). |
12259 | Also treat note sections as a root, if the section is not part | |
12260 | of a group. */ | |
c152c796 | 12261 | for (o = sub->sections; o != NULL; o = o->next) |
7f6ab9f8 AM |
12262 | if (!o->gc_mark |
12263 | && (o->flags & SEC_EXCLUDE) == 0 | |
24007750 | 12264 | && ((o->flags & SEC_KEEP) != 0 |
7f6ab9f8 AM |
12265 | || (elf_section_data (o)->this_hdr.sh_type == SHT_NOTE |
12266 | && elf_next_in_group (o) == NULL ))) | |
12267 | { | |
12268 | if (!_bfd_elf_gc_mark (info, o, gc_mark_hook)) | |
12269 | return FALSE; | |
12270 | } | |
c152c796 AM |
12271 | } |
12272 | ||
6a5bb875 | 12273 | /* Allow the backend to mark additional target specific sections. */ |
7f6ab9f8 | 12274 | bed->gc_mark_extra_sections (info, gc_mark_hook); |
6a5bb875 | 12275 | |
c152c796 | 12276 | /* ... and mark SEC_EXCLUDE for those that go. */ |
ccabcbe5 | 12277 | return elf_gc_sweep (abfd, info); |
c152c796 AM |
12278 | } |
12279 | \f | |
12280 | /* Called from check_relocs to record the existence of a VTINHERIT reloc. */ | |
12281 | ||
12282 | bfd_boolean | |
12283 | bfd_elf_gc_record_vtinherit (bfd *abfd, | |
12284 | asection *sec, | |
12285 | struct elf_link_hash_entry *h, | |
12286 | bfd_vma offset) | |
12287 | { | |
12288 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
12289 | struct elf_link_hash_entry **search, *child; | |
12290 | bfd_size_type extsymcount; | |
12291 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12292 | ||
12293 | /* The sh_info field of the symtab header tells us where the | |
12294 | external symbols start. We don't care about the local symbols at | |
12295 | this point. */ | |
12296 | extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size / bed->s->sizeof_sym; | |
12297 | if (!elf_bad_symtab (abfd)) | |
12298 | extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info; | |
12299 | ||
12300 | sym_hashes = elf_sym_hashes (abfd); | |
12301 | sym_hashes_end = sym_hashes + extsymcount; | |
12302 | ||
12303 | /* Hunt down the child symbol, which is in this section at the same | |
12304 | offset as the relocation. */ | |
12305 | for (search = sym_hashes; search != sym_hashes_end; ++search) | |
12306 | { | |
12307 | if ((child = *search) != NULL | |
12308 | && (child->root.type == bfd_link_hash_defined | |
12309 | || child->root.type == bfd_link_hash_defweak) | |
12310 | && child->root.u.def.section == sec | |
12311 | && child->root.u.def.value == offset) | |
12312 | goto win; | |
12313 | } | |
12314 | ||
d003868e AM |
12315 | (*_bfd_error_handler) ("%B: %A+%lu: No symbol found for INHERIT", |
12316 | abfd, sec, (unsigned long) offset); | |
c152c796 AM |
12317 | bfd_set_error (bfd_error_invalid_operation); |
12318 | return FALSE; | |
12319 | ||
12320 | win: | |
f6e332e6 AM |
12321 | if (!child->vtable) |
12322 | { | |
a50b1753 NC |
12323 | child->vtable = (struct elf_link_virtual_table_entry *) |
12324 | bfd_zalloc (abfd, sizeof (*child->vtable)); | |
f6e332e6 AM |
12325 | if (!child->vtable) |
12326 | return FALSE; | |
12327 | } | |
c152c796 AM |
12328 | if (!h) |
12329 | { | |
12330 | /* This *should* only be the absolute section. It could potentially | |
12331 | be that someone has defined a non-global vtable though, which | |
12332 | would be bad. It isn't worth paging in the local symbols to be | |
12333 | sure though; that case should simply be handled by the assembler. */ | |
12334 | ||
f6e332e6 | 12335 | child->vtable->parent = (struct elf_link_hash_entry *) -1; |
c152c796 AM |
12336 | } |
12337 | else | |
f6e332e6 | 12338 | child->vtable->parent = h; |
c152c796 AM |
12339 | |
12340 | return TRUE; | |
12341 | } | |
12342 | ||
12343 | /* Called from check_relocs to record the existence of a VTENTRY reloc. */ | |
12344 | ||
12345 | bfd_boolean | |
12346 | bfd_elf_gc_record_vtentry (bfd *abfd ATTRIBUTE_UNUSED, | |
12347 | asection *sec ATTRIBUTE_UNUSED, | |
12348 | struct elf_link_hash_entry *h, | |
12349 | bfd_vma addend) | |
12350 | { | |
12351 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12352 | unsigned int log_file_align = bed->s->log_file_align; | |
12353 | ||
f6e332e6 AM |
12354 | if (!h->vtable) |
12355 | { | |
a50b1753 NC |
12356 | h->vtable = (struct elf_link_virtual_table_entry *) |
12357 | bfd_zalloc (abfd, sizeof (*h->vtable)); | |
f6e332e6 AM |
12358 | if (!h->vtable) |
12359 | return FALSE; | |
12360 | } | |
12361 | ||
12362 | if (addend >= h->vtable->size) | |
c152c796 AM |
12363 | { |
12364 | size_t size, bytes, file_align; | |
f6e332e6 | 12365 | bfd_boolean *ptr = h->vtable->used; |
c152c796 AM |
12366 | |
12367 | /* While the symbol is undefined, we have to be prepared to handle | |
12368 | a zero size. */ | |
12369 | file_align = 1 << log_file_align; | |
12370 | if (h->root.type == bfd_link_hash_undefined) | |
12371 | size = addend + file_align; | |
12372 | else | |
12373 | { | |
12374 | size = h->size; | |
12375 | if (addend >= size) | |
12376 | { | |
12377 | /* Oops! We've got a reference past the defined end of | |
12378 | the table. This is probably a bug -- shall we warn? */ | |
12379 | size = addend + file_align; | |
12380 | } | |
12381 | } | |
12382 | size = (size + file_align - 1) & -file_align; | |
12383 | ||
12384 | /* Allocate one extra entry for use as a "done" flag for the | |
12385 | consolidation pass. */ | |
12386 | bytes = ((size >> log_file_align) + 1) * sizeof (bfd_boolean); | |
12387 | ||
12388 | if (ptr) | |
12389 | { | |
a50b1753 | 12390 | ptr = (bfd_boolean *) bfd_realloc (ptr - 1, bytes); |
c152c796 AM |
12391 | |
12392 | if (ptr != NULL) | |
12393 | { | |
12394 | size_t oldbytes; | |
12395 | ||
f6e332e6 | 12396 | oldbytes = (((h->vtable->size >> log_file_align) + 1) |
c152c796 AM |
12397 | * sizeof (bfd_boolean)); |
12398 | memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes); | |
12399 | } | |
12400 | } | |
12401 | else | |
a50b1753 | 12402 | ptr = (bfd_boolean *) bfd_zmalloc (bytes); |
c152c796 AM |
12403 | |
12404 | if (ptr == NULL) | |
12405 | return FALSE; | |
12406 | ||
12407 | /* And arrange for that done flag to be at index -1. */ | |
f6e332e6 AM |
12408 | h->vtable->used = ptr + 1; |
12409 | h->vtable->size = size; | |
c152c796 AM |
12410 | } |
12411 | ||
f6e332e6 | 12412 | h->vtable->used[addend >> log_file_align] = TRUE; |
c152c796 AM |
12413 | |
12414 | return TRUE; | |
12415 | } | |
12416 | ||
ae17ab41 CM |
12417 | /* Map an ELF section header flag to its corresponding string. */ |
12418 | typedef struct | |
12419 | { | |
12420 | char *flag_name; | |
12421 | flagword flag_value; | |
12422 | } elf_flags_to_name_table; | |
12423 | ||
12424 | static elf_flags_to_name_table elf_flags_to_names [] = | |
12425 | { | |
12426 | { "SHF_WRITE", SHF_WRITE }, | |
12427 | { "SHF_ALLOC", SHF_ALLOC }, | |
12428 | { "SHF_EXECINSTR", SHF_EXECINSTR }, | |
12429 | { "SHF_MERGE", SHF_MERGE }, | |
12430 | { "SHF_STRINGS", SHF_STRINGS }, | |
12431 | { "SHF_INFO_LINK", SHF_INFO_LINK}, | |
12432 | { "SHF_LINK_ORDER", SHF_LINK_ORDER}, | |
12433 | { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING}, | |
12434 | { "SHF_GROUP", SHF_GROUP }, | |
12435 | { "SHF_TLS", SHF_TLS }, | |
12436 | { "SHF_MASKOS", SHF_MASKOS }, | |
12437 | { "SHF_EXCLUDE", SHF_EXCLUDE }, | |
12438 | }; | |
12439 | ||
b9c361e0 JL |
12440 | /* Returns TRUE if the section is to be included, otherwise FALSE. */ |
12441 | bfd_boolean | |
ae17ab41 | 12442 | bfd_elf_lookup_section_flags (struct bfd_link_info *info, |
8b127cbc | 12443 | struct flag_info *flaginfo, |
b9c361e0 | 12444 | asection *section) |
ae17ab41 | 12445 | { |
8b127cbc | 12446 | const bfd_vma sh_flags = elf_section_flags (section); |
ae17ab41 | 12447 | |
8b127cbc | 12448 | if (!flaginfo->flags_initialized) |
ae17ab41 | 12449 | { |
8b127cbc AM |
12450 | bfd *obfd = info->output_bfd; |
12451 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
12452 | struct flag_info_list *tf = flaginfo->flag_list; | |
b9c361e0 JL |
12453 | int with_hex = 0; |
12454 | int without_hex = 0; | |
12455 | ||
8b127cbc | 12456 | for (tf = flaginfo->flag_list; tf != NULL; tf = tf->next) |
ae17ab41 | 12457 | { |
b9c361e0 | 12458 | unsigned i; |
8b127cbc | 12459 | flagword (*lookup) (char *); |
ae17ab41 | 12460 | |
8b127cbc AM |
12461 | lookup = bed->elf_backend_lookup_section_flags_hook; |
12462 | if (lookup != NULL) | |
ae17ab41 | 12463 | { |
8b127cbc | 12464 | flagword hexval = (*lookup) ((char *) tf->name); |
b9c361e0 JL |
12465 | |
12466 | if (hexval != 0) | |
12467 | { | |
12468 | if (tf->with == with_flags) | |
12469 | with_hex |= hexval; | |
12470 | else if (tf->with == without_flags) | |
12471 | without_hex |= hexval; | |
12472 | tf->valid = TRUE; | |
12473 | continue; | |
12474 | } | |
ae17ab41 | 12475 | } |
8b127cbc | 12476 | for (i = 0; i < ARRAY_SIZE (elf_flags_to_names); ++i) |
ae17ab41 | 12477 | { |
8b127cbc | 12478 | if (strcmp (tf->name, elf_flags_to_names[i].flag_name) == 0) |
b9c361e0 JL |
12479 | { |
12480 | if (tf->with == with_flags) | |
12481 | with_hex |= elf_flags_to_names[i].flag_value; | |
12482 | else if (tf->with == without_flags) | |
12483 | without_hex |= elf_flags_to_names[i].flag_value; | |
12484 | tf->valid = TRUE; | |
12485 | break; | |
12486 | } | |
12487 | } | |
8b127cbc | 12488 | if (!tf->valid) |
b9c361e0 | 12489 | { |
68ffbac6 | 12490 | info->callbacks->einfo |
8b127cbc | 12491 | (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf->name); |
b9c361e0 | 12492 | return FALSE; |
ae17ab41 CM |
12493 | } |
12494 | } | |
8b127cbc AM |
12495 | flaginfo->flags_initialized = TRUE; |
12496 | flaginfo->only_with_flags |= with_hex; | |
12497 | flaginfo->not_with_flags |= without_hex; | |
ae17ab41 | 12498 | } |
ae17ab41 | 12499 | |
8b127cbc | 12500 | if ((flaginfo->only_with_flags & sh_flags) != flaginfo->only_with_flags) |
b9c361e0 JL |
12501 | return FALSE; |
12502 | ||
8b127cbc | 12503 | if ((flaginfo->not_with_flags & sh_flags) != 0) |
b9c361e0 JL |
12504 | return FALSE; |
12505 | ||
12506 | return TRUE; | |
ae17ab41 CM |
12507 | } |
12508 | ||
c152c796 AM |
12509 | struct alloc_got_off_arg { |
12510 | bfd_vma gotoff; | |
10455f89 | 12511 | struct bfd_link_info *info; |
c152c796 AM |
12512 | }; |
12513 | ||
12514 | /* We need a special top-level link routine to convert got reference counts | |
12515 | to real got offsets. */ | |
12516 | ||
12517 | static bfd_boolean | |
12518 | elf_gc_allocate_got_offsets (struct elf_link_hash_entry *h, void *arg) | |
12519 | { | |
a50b1753 | 12520 | struct alloc_got_off_arg *gofarg = (struct alloc_got_off_arg *) arg; |
10455f89 HPN |
12521 | bfd *obfd = gofarg->info->output_bfd; |
12522 | const struct elf_backend_data *bed = get_elf_backend_data (obfd); | |
c152c796 | 12523 | |
c152c796 AM |
12524 | if (h->got.refcount > 0) |
12525 | { | |
12526 | h->got.offset = gofarg->gotoff; | |
10455f89 | 12527 | gofarg->gotoff += bed->got_elt_size (obfd, gofarg->info, h, NULL, 0); |
c152c796 AM |
12528 | } |
12529 | else | |
12530 | h->got.offset = (bfd_vma) -1; | |
12531 | ||
12532 | return TRUE; | |
12533 | } | |
12534 | ||
12535 | /* And an accompanying bit to work out final got entry offsets once | |
12536 | we're done. Should be called from final_link. */ | |
12537 | ||
12538 | bfd_boolean | |
12539 | bfd_elf_gc_common_finalize_got_offsets (bfd *abfd, | |
12540 | struct bfd_link_info *info) | |
12541 | { | |
12542 | bfd *i; | |
12543 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12544 | bfd_vma gotoff; | |
c152c796 AM |
12545 | struct alloc_got_off_arg gofarg; |
12546 | ||
10455f89 HPN |
12547 | BFD_ASSERT (abfd == info->output_bfd); |
12548 | ||
c152c796 AM |
12549 | if (! is_elf_hash_table (info->hash)) |
12550 | return FALSE; | |
12551 | ||
12552 | /* The GOT offset is relative to the .got section, but the GOT header is | |
12553 | put into the .got.plt section, if the backend uses it. */ | |
12554 | if (bed->want_got_plt) | |
12555 | gotoff = 0; | |
12556 | else | |
12557 | gotoff = bed->got_header_size; | |
12558 | ||
12559 | /* Do the local .got entries first. */ | |
12560 | for (i = info->input_bfds; i; i = i->link_next) | |
12561 | { | |
12562 | bfd_signed_vma *local_got; | |
12563 | bfd_size_type j, locsymcount; | |
12564 | Elf_Internal_Shdr *symtab_hdr; | |
12565 | ||
12566 | if (bfd_get_flavour (i) != bfd_target_elf_flavour) | |
12567 | continue; | |
12568 | ||
12569 | local_got = elf_local_got_refcounts (i); | |
12570 | if (!local_got) | |
12571 | continue; | |
12572 | ||
12573 | symtab_hdr = &elf_tdata (i)->symtab_hdr; | |
12574 | if (elf_bad_symtab (i)) | |
12575 | locsymcount = symtab_hdr->sh_size / bed->s->sizeof_sym; | |
12576 | else | |
12577 | locsymcount = symtab_hdr->sh_info; | |
12578 | ||
12579 | for (j = 0; j < locsymcount; ++j) | |
12580 | { | |
12581 | if (local_got[j] > 0) | |
12582 | { | |
12583 | local_got[j] = gotoff; | |
10455f89 | 12584 | gotoff += bed->got_elt_size (abfd, info, NULL, i, j); |
c152c796 AM |
12585 | } |
12586 | else | |
12587 | local_got[j] = (bfd_vma) -1; | |
12588 | } | |
12589 | } | |
12590 | ||
12591 | /* Then the global .got entries. .plt refcounts are handled by | |
12592 | adjust_dynamic_symbol */ | |
12593 | gofarg.gotoff = gotoff; | |
10455f89 | 12594 | gofarg.info = info; |
c152c796 AM |
12595 | elf_link_hash_traverse (elf_hash_table (info), |
12596 | elf_gc_allocate_got_offsets, | |
12597 | &gofarg); | |
12598 | return TRUE; | |
12599 | } | |
12600 | ||
12601 | /* Many folk need no more in the way of final link than this, once | |
12602 | got entry reference counting is enabled. */ | |
12603 | ||
12604 | bfd_boolean | |
12605 | bfd_elf_gc_common_final_link (bfd *abfd, struct bfd_link_info *info) | |
12606 | { | |
12607 | if (!bfd_elf_gc_common_finalize_got_offsets (abfd, info)) | |
12608 | return FALSE; | |
12609 | ||
12610 | /* Invoke the regular ELF backend linker to do all the work. */ | |
12611 | return bfd_elf_final_link (abfd, info); | |
12612 | } | |
12613 | ||
12614 | bfd_boolean | |
12615 | bfd_elf_reloc_symbol_deleted_p (bfd_vma offset, void *cookie) | |
12616 | { | |
a50b1753 | 12617 | struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie; |
c152c796 AM |
12618 | |
12619 | if (rcookie->bad_symtab) | |
12620 | rcookie->rel = rcookie->rels; | |
12621 | ||
12622 | for (; rcookie->rel < rcookie->relend; rcookie->rel++) | |
12623 | { | |
12624 | unsigned long r_symndx; | |
12625 | ||
12626 | if (! rcookie->bad_symtab) | |
12627 | if (rcookie->rel->r_offset > offset) | |
12628 | return FALSE; | |
12629 | if (rcookie->rel->r_offset != offset) | |
12630 | continue; | |
12631 | ||
12632 | r_symndx = rcookie->rel->r_info >> rcookie->r_sym_shift; | |
2c2fa401 | 12633 | if (r_symndx == STN_UNDEF) |
c152c796 AM |
12634 | return TRUE; |
12635 | ||
12636 | if (r_symndx >= rcookie->locsymcount | |
12637 | || ELF_ST_BIND (rcookie->locsyms[r_symndx].st_info) != STB_LOCAL) | |
12638 | { | |
12639 | struct elf_link_hash_entry *h; | |
12640 | ||
12641 | h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff]; | |
12642 | ||
12643 | while (h->root.type == bfd_link_hash_indirect | |
12644 | || h->root.type == bfd_link_hash_warning) | |
12645 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
12646 | ||
12647 | if ((h->root.type == bfd_link_hash_defined | |
12648 | || h->root.type == bfd_link_hash_defweak) | |
dbaa2011 | 12649 | && discarded_section (h->root.u.def.section)) |
c152c796 AM |
12650 | return TRUE; |
12651 | else | |
12652 | return FALSE; | |
12653 | } | |
12654 | else | |
12655 | { | |
12656 | /* It's not a relocation against a global symbol, | |
12657 | but it could be a relocation against a local | |
12658 | symbol for a discarded section. */ | |
12659 | asection *isec; | |
12660 | Elf_Internal_Sym *isym; | |
12661 | ||
12662 | /* Need to: get the symbol; get the section. */ | |
12663 | isym = &rcookie->locsyms[r_symndx]; | |
cb33740c | 12664 | isec = bfd_section_from_elf_index (rcookie->abfd, isym->st_shndx); |
dbaa2011 | 12665 | if (isec != NULL && discarded_section (isec)) |
cb33740c | 12666 | return TRUE; |
c152c796 AM |
12667 | } |
12668 | return FALSE; | |
12669 | } | |
12670 | return FALSE; | |
12671 | } | |
12672 | ||
12673 | /* Discard unneeded references to discarded sections. | |
12674 | Returns TRUE if any section's size was changed. */ | |
12675 | /* This function assumes that the relocations are in sorted order, | |
12676 | which is true for all known assemblers. */ | |
12677 | ||
12678 | bfd_boolean | |
12679 | bfd_elf_discard_info (bfd *output_bfd, struct bfd_link_info *info) | |
12680 | { | |
12681 | struct elf_reloc_cookie cookie; | |
12682 | asection *stab, *eh; | |
c152c796 AM |
12683 | const struct elf_backend_data *bed; |
12684 | bfd *abfd; | |
c152c796 AM |
12685 | bfd_boolean ret = FALSE; |
12686 | ||
12687 | if (info->traditional_format | |
12688 | || !is_elf_hash_table (info->hash)) | |
12689 | return FALSE; | |
12690 | ||
ca92cecb | 12691 | _bfd_elf_begin_eh_frame_parsing (info); |
c152c796 AM |
12692 | for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) |
12693 | { | |
12694 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
12695 | continue; | |
12696 | ||
12697 | bed = get_elf_backend_data (abfd); | |
12698 | ||
8da3dbc5 AM |
12699 | eh = NULL; |
12700 | if (!info->relocatable) | |
12701 | { | |
12702 | eh = bfd_get_section_by_name (abfd, ".eh_frame"); | |
7e01508c AM |
12703 | while (eh != NULL |
12704 | && (eh->size == 0 | |
12705 | || bfd_is_abs_section (eh->output_section))) | |
12706 | eh = bfd_get_next_section_by_name (eh); | |
8da3dbc5 | 12707 | } |
c152c796 AM |
12708 | |
12709 | stab = bfd_get_section_by_name (abfd, ".stab"); | |
12710 | if (stab != NULL | |
eea6121a | 12711 | && (stab->size == 0 |
c152c796 | 12712 | || bfd_is_abs_section (stab->output_section) |
dbaa2011 | 12713 | || stab->sec_info_type != SEC_INFO_TYPE_STABS)) |
c152c796 AM |
12714 | stab = NULL; |
12715 | ||
12716 | if (stab == NULL | |
12717 | && eh == NULL | |
12718 | && bed->elf_backend_discard_info == NULL) | |
12719 | continue; | |
12720 | ||
5241d853 RS |
12721 | if (!init_reloc_cookie (&cookie, info, abfd)) |
12722 | return FALSE; | |
c152c796 | 12723 | |
5241d853 RS |
12724 | if (stab != NULL |
12725 | && stab->reloc_count > 0 | |
12726 | && init_reloc_cookie_rels (&cookie, info, abfd, stab)) | |
c152c796 | 12727 | { |
5241d853 RS |
12728 | if (_bfd_discard_section_stabs (abfd, stab, |
12729 | elf_section_data (stab)->sec_info, | |
12730 | bfd_elf_reloc_symbol_deleted_p, | |
12731 | &cookie)) | |
12732 | ret = TRUE; | |
12733 | fini_reloc_cookie_rels (&cookie, stab); | |
c152c796 AM |
12734 | } |
12735 | ||
90061c33 AM |
12736 | while (eh != NULL |
12737 | && init_reloc_cookie_rels (&cookie, info, abfd, eh)) | |
c152c796 | 12738 | { |
ca92cecb | 12739 | _bfd_elf_parse_eh_frame (abfd, info, eh, &cookie); |
c152c796 AM |
12740 | if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, |
12741 | bfd_elf_reloc_symbol_deleted_p, | |
12742 | &cookie)) | |
12743 | ret = TRUE; | |
5241d853 | 12744 | fini_reloc_cookie_rels (&cookie, eh); |
90061c33 | 12745 | eh = bfd_get_next_section_by_name (eh); |
c152c796 AM |
12746 | } |
12747 | ||
12748 | if (bed->elf_backend_discard_info != NULL | |
12749 | && (*bed->elf_backend_discard_info) (abfd, &cookie, info)) | |
12750 | ret = TRUE; | |
12751 | ||
5241d853 | 12752 | fini_reloc_cookie (&cookie, abfd); |
c152c796 | 12753 | } |
ca92cecb | 12754 | _bfd_elf_end_eh_frame_parsing (info); |
c152c796 AM |
12755 | |
12756 | if (info->eh_frame_hdr | |
12757 | && !info->relocatable | |
12758 | && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info)) | |
12759 | ret = TRUE; | |
12760 | ||
12761 | return ret; | |
12762 | } | |
082b7297 | 12763 | |
43e1669b | 12764 | bfd_boolean |
0c511000 | 12765 | _bfd_elf_section_already_linked (bfd *abfd, |
c77ec726 | 12766 | asection *sec, |
c0f00686 | 12767 | struct bfd_link_info *info) |
082b7297 L |
12768 | { |
12769 | flagword flags; | |
c77ec726 | 12770 | const char *name, *key; |
082b7297 L |
12771 | struct bfd_section_already_linked *l; |
12772 | struct bfd_section_already_linked_hash_entry *already_linked_list; | |
0c511000 | 12773 | |
c77ec726 AM |
12774 | if (sec->output_section == bfd_abs_section_ptr) |
12775 | return FALSE; | |
0c511000 | 12776 | |
c77ec726 | 12777 | flags = sec->flags; |
0c511000 | 12778 | |
c77ec726 AM |
12779 | /* Return if it isn't a linkonce section. A comdat group section |
12780 | also has SEC_LINK_ONCE set. */ | |
12781 | if ((flags & SEC_LINK_ONCE) == 0) | |
12782 | return FALSE; | |
0c511000 | 12783 | |
c77ec726 AM |
12784 | /* Don't put group member sections on our list of already linked |
12785 | sections. They are handled as a group via their group section. */ | |
12786 | if (elf_sec_group (sec) != NULL) | |
12787 | return FALSE; | |
0c511000 | 12788 | |
c77ec726 AM |
12789 | /* For a SHT_GROUP section, use the group signature as the key. */ |
12790 | name = sec->name; | |
12791 | if ((flags & SEC_GROUP) != 0 | |
12792 | && elf_next_in_group (sec) != NULL | |
12793 | && elf_group_name (elf_next_in_group (sec)) != NULL) | |
12794 | key = elf_group_name (elf_next_in_group (sec)); | |
12795 | else | |
12796 | { | |
12797 | /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */ | |
0c511000 | 12798 | if (CONST_STRNEQ (name, ".gnu.linkonce.") |
c77ec726 AM |
12799 | && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
12800 | key++; | |
0c511000 | 12801 | else |
c77ec726 AM |
12802 | /* Must be a user linkonce section that doesn't follow gcc's |
12803 | naming convention. In this case we won't be matching | |
12804 | single member groups. */ | |
12805 | key = name; | |
0c511000 | 12806 | } |
6d2cd210 | 12807 | |
c77ec726 | 12808 | already_linked_list = bfd_section_already_linked_table_lookup (key); |
082b7297 L |
12809 | |
12810 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
12811 | { | |
c2370991 | 12812 | /* We may have 2 different types of sections on the list: group |
c77ec726 AM |
12813 | sections with a signature of <key> (<key> is some string), |
12814 | and linkonce sections named .gnu.linkonce.<type>.<key>. | |
12815 | Match like sections. LTO plugin sections are an exception. | |
12816 | They are always named .gnu.linkonce.t.<key> and match either | |
12817 | type of section. */ | |
12818 | if (((flags & SEC_GROUP) == (l->sec->flags & SEC_GROUP) | |
12819 | && ((flags & SEC_GROUP) != 0 | |
12820 | || strcmp (name, l->sec->name) == 0)) | |
12821 | || (l->sec->owner->flags & BFD_PLUGIN) != 0) | |
082b7297 L |
12822 | { |
12823 | /* The section has already been linked. See if we should | |
6d2cd210 | 12824 | issue a warning. */ |
c77ec726 AM |
12825 | if (!_bfd_handle_already_linked (sec, l, info)) |
12826 | return FALSE; | |
082b7297 | 12827 | |
c77ec726 | 12828 | if (flags & SEC_GROUP) |
3d7f7666 | 12829 | { |
c77ec726 AM |
12830 | asection *first = elf_next_in_group (sec); |
12831 | asection *s = first; | |
3d7f7666 | 12832 | |
c77ec726 | 12833 | while (s != NULL) |
3d7f7666 | 12834 | { |
c77ec726 AM |
12835 | s->output_section = bfd_abs_section_ptr; |
12836 | /* Record which group discards it. */ | |
12837 | s->kept_section = l->sec; | |
12838 | s = elf_next_in_group (s); | |
12839 | /* These lists are circular. */ | |
12840 | if (s == first) | |
12841 | break; | |
3d7f7666 L |
12842 | } |
12843 | } | |
082b7297 | 12844 | |
43e1669b | 12845 | return TRUE; |
082b7297 L |
12846 | } |
12847 | } | |
12848 | ||
c77ec726 AM |
12849 | /* A single member comdat group section may be discarded by a |
12850 | linkonce section and vice versa. */ | |
12851 | if ((flags & SEC_GROUP) != 0) | |
3d7f7666 | 12852 | { |
c77ec726 | 12853 | asection *first = elf_next_in_group (sec); |
c2370991 | 12854 | |
c77ec726 AM |
12855 | if (first != NULL && elf_next_in_group (first) == first) |
12856 | /* Check this single member group against linkonce sections. */ | |
12857 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
12858 | if ((l->sec->flags & SEC_GROUP) == 0 | |
12859 | && bfd_elf_match_symbols_in_sections (l->sec, first, info)) | |
12860 | { | |
12861 | first->output_section = bfd_abs_section_ptr; | |
12862 | first->kept_section = l->sec; | |
12863 | sec->output_section = bfd_abs_section_ptr; | |
12864 | break; | |
12865 | } | |
12866 | } | |
12867 | else | |
12868 | /* Check this linkonce section against single member groups. */ | |
12869 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
12870 | if (l->sec->flags & SEC_GROUP) | |
6d2cd210 | 12871 | { |
c77ec726 | 12872 | asection *first = elf_next_in_group (l->sec); |
6d2cd210 | 12873 | |
c77ec726 AM |
12874 | if (first != NULL |
12875 | && elf_next_in_group (first) == first | |
12876 | && bfd_elf_match_symbols_in_sections (first, sec, info)) | |
12877 | { | |
12878 | sec->output_section = bfd_abs_section_ptr; | |
12879 | sec->kept_section = first; | |
12880 | break; | |
12881 | } | |
6d2cd210 | 12882 | } |
0c511000 | 12883 | |
c77ec726 AM |
12884 | /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F' |
12885 | referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4 | |
12886 | specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce' | |
12887 | prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its | |
12888 | matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded | |
12889 | but its `.gnu.linkonce.t.F' is discarded means we chose one-only | |
12890 | `.gnu.linkonce.t.F' section from a different bfd not requiring any | |
12891 | `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded. | |
12892 | The reverse order cannot happen as there is never a bfd with only the | |
12893 | `.gnu.linkonce.r.F' section. The order of sections in a bfd does not | |
12894 | matter as here were are looking only for cross-bfd sections. */ | |
12895 | ||
12896 | if ((flags & SEC_GROUP) == 0 && CONST_STRNEQ (name, ".gnu.linkonce.r.")) | |
12897 | for (l = already_linked_list->entry; l != NULL; l = l->next) | |
12898 | if ((l->sec->flags & SEC_GROUP) == 0 | |
12899 | && CONST_STRNEQ (l->sec->name, ".gnu.linkonce.t.")) | |
12900 | { | |
12901 | if (abfd != l->sec->owner) | |
12902 | sec->output_section = bfd_abs_section_ptr; | |
12903 | break; | |
12904 | } | |
80c29487 | 12905 | |
082b7297 | 12906 | /* This is the first section with this name. Record it. */ |
c77ec726 | 12907 | if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
bb6198d2 | 12908 | info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
c77ec726 | 12909 | return sec->output_section == bfd_abs_section_ptr; |
082b7297 | 12910 | } |
81e1b023 | 12911 | |
a4d8e49b L |
12912 | bfd_boolean |
12913 | _bfd_elf_common_definition (Elf_Internal_Sym *sym) | |
12914 | { | |
12915 | return sym->st_shndx == SHN_COMMON; | |
12916 | } | |
12917 | ||
12918 | unsigned int | |
12919 | _bfd_elf_common_section_index (asection *sec ATTRIBUTE_UNUSED) | |
12920 | { | |
12921 | return SHN_COMMON; | |
12922 | } | |
12923 | ||
12924 | asection * | |
12925 | _bfd_elf_common_section (asection *sec ATTRIBUTE_UNUSED) | |
12926 | { | |
12927 | return bfd_com_section_ptr; | |
12928 | } | |
10455f89 HPN |
12929 | |
12930 | bfd_vma | |
12931 | _bfd_elf_default_got_elt_size (bfd *abfd, | |
12932 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
12933 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED, | |
12934 | bfd *ibfd ATTRIBUTE_UNUSED, | |
12935 | unsigned long symndx ATTRIBUTE_UNUSED) | |
12936 | { | |
12937 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
12938 | return bed->s->arch_size / 8; | |
12939 | } | |
83bac4b0 NC |
12940 | |
12941 | /* Routines to support the creation of dynamic relocs. */ | |
12942 | ||
83bac4b0 NC |
12943 | /* Returns the name of the dynamic reloc section associated with SEC. */ |
12944 | ||
12945 | static const char * | |
12946 | get_dynamic_reloc_section_name (bfd * abfd, | |
12947 | asection * sec, | |
12948 | bfd_boolean is_rela) | |
12949 | { | |
ddcf1fcf BS |
12950 | char *name; |
12951 | const char *old_name = bfd_get_section_name (NULL, sec); | |
12952 | const char *prefix = is_rela ? ".rela" : ".rel"; | |
83bac4b0 | 12953 | |
ddcf1fcf | 12954 | if (old_name == NULL) |
83bac4b0 NC |
12955 | return NULL; |
12956 | ||
ddcf1fcf | 12957 | name = bfd_alloc (abfd, strlen (prefix) + strlen (old_name) + 1); |
68ffbac6 | 12958 | sprintf (name, "%s%s", prefix, old_name); |
83bac4b0 NC |
12959 | |
12960 | return name; | |
12961 | } | |
12962 | ||
12963 | /* Returns the dynamic reloc section associated with SEC. | |
12964 | If necessary compute the name of the dynamic reloc section based | |
12965 | on SEC's name (looked up in ABFD's string table) and the setting | |
12966 | of IS_RELA. */ | |
12967 | ||
12968 | asection * | |
12969 | _bfd_elf_get_dynamic_reloc_section (bfd * abfd, | |
12970 | asection * sec, | |
12971 | bfd_boolean is_rela) | |
12972 | { | |
12973 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
12974 | ||
12975 | if (reloc_sec == NULL) | |
12976 | { | |
12977 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
12978 | ||
12979 | if (name != NULL) | |
12980 | { | |
3d4d4302 | 12981 | reloc_sec = bfd_get_linker_section (abfd, name); |
83bac4b0 NC |
12982 | |
12983 | if (reloc_sec != NULL) | |
12984 | elf_section_data (sec)->sreloc = reloc_sec; | |
12985 | } | |
12986 | } | |
12987 | ||
12988 | return reloc_sec; | |
12989 | } | |
12990 | ||
12991 | /* Returns the dynamic reloc section associated with SEC. If the | |
12992 | section does not exist it is created and attached to the DYNOBJ | |
12993 | bfd and stored in the SRELOC field of SEC's elf_section_data | |
12994 | structure. | |
f8076f98 | 12995 | |
83bac4b0 NC |
12996 | ALIGNMENT is the alignment for the newly created section and |
12997 | IS_RELA defines whether the name should be .rela.<SEC's name> | |
12998 | or .rel.<SEC's name>. The section name is looked up in the | |
12999 | string table associated with ABFD. */ | |
13000 | ||
13001 | asection * | |
13002 | _bfd_elf_make_dynamic_reloc_section (asection * sec, | |
13003 | bfd * dynobj, | |
13004 | unsigned int alignment, | |
13005 | bfd * abfd, | |
13006 | bfd_boolean is_rela) | |
13007 | { | |
13008 | asection * reloc_sec = elf_section_data (sec)->sreloc; | |
13009 | ||
13010 | if (reloc_sec == NULL) | |
13011 | { | |
13012 | const char * name = get_dynamic_reloc_section_name (abfd, sec, is_rela); | |
13013 | ||
13014 | if (name == NULL) | |
13015 | return NULL; | |
13016 | ||
3d4d4302 | 13017 | reloc_sec = bfd_get_linker_section (dynobj, name); |
83bac4b0 NC |
13018 | |
13019 | if (reloc_sec == NULL) | |
13020 | { | |
3d4d4302 AM |
13021 | flagword flags = (SEC_HAS_CONTENTS | SEC_READONLY |
13022 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
83bac4b0 NC |
13023 | if ((sec->flags & SEC_ALLOC) != 0) |
13024 | flags |= SEC_ALLOC | SEC_LOAD; | |
13025 | ||
3d4d4302 | 13026 | reloc_sec = bfd_make_section_anyway_with_flags (dynobj, name, flags); |
83bac4b0 NC |
13027 | if (reloc_sec != NULL) |
13028 | { | |
8877b5e5 AM |
13029 | /* _bfd_elf_get_sec_type_attr chooses a section type by |
13030 | name. Override as it may be wrong, eg. for a user | |
13031 | section named "auto" we'll get ".relauto" which is | |
13032 | seen to be a .rela section. */ | |
13033 | elf_section_type (reloc_sec) = is_rela ? SHT_RELA : SHT_REL; | |
83bac4b0 NC |
13034 | if (! bfd_set_section_alignment (dynobj, reloc_sec, alignment)) |
13035 | reloc_sec = NULL; | |
13036 | } | |
13037 | } | |
13038 | ||
13039 | elf_section_data (sec)->sreloc = reloc_sec; | |
13040 | } | |
13041 | ||
13042 | return reloc_sec; | |
13043 | } | |
1338dd10 PB |
13044 | |
13045 | /* Copy the ELF symbol type associated with a linker hash entry. */ | |
13046 | void | |
13047 | _bfd_elf_copy_link_hash_symbol_type (bfd *abfd ATTRIBUTE_UNUSED, | |
13048 | struct bfd_link_hash_entry * hdest, | |
13049 | struct bfd_link_hash_entry * hsrc) | |
13050 | { | |
13051 | struct elf_link_hash_entry *ehdest = (struct elf_link_hash_entry *)hdest; | |
13052 | struct elf_link_hash_entry *ehsrc = (struct elf_link_hash_entry *)hsrc; | |
13053 | ||
13054 | ehdest->type = ehsrc->type; | |
35fc36a8 | 13055 | ehdest->target_internal = ehsrc->target_internal; |
1338dd10 | 13056 | } |
351f65ca L |
13057 | |
13058 | /* Append a RELA relocation REL to section S in BFD. */ | |
13059 | ||
13060 | void | |
13061 | elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13062 | { | |
13063 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13064 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
13065 | BFD_ASSERT (loc + bed->s->sizeof_rela <= s->contents + s->size); | |
13066 | bed->s->swap_reloca_out (abfd, rel, loc); | |
13067 | } | |
13068 | ||
13069 | /* Append a REL relocation REL to section S in BFD. */ | |
13070 | ||
13071 | void | |
13072 | elf_append_rel (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
13073 | { | |
13074 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
13075 | bfd_byte *loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rel); | |
13076 | BFD_ASSERT (loc + bed->s->sizeof_rel <= s->contents + s->size); | |
59d6ffb2 | 13077 | bed->s->swap_reloc_out (abfd, rel, loc); |
351f65ca | 13078 | } |