1 /* ELF linking support for BFD.
2 Copyright (C) 1995-2016 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
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.
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
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
23 #include "bfd_stdint.h"
28 #include "safe-ctype.h"
29 #include "libiberty.h"
32 /* This struct is used to pass information to routines called via
33 elf_link_hash_traverse which must return failure. */
35 struct elf_info_failed
37 struct bfd_link_info
*info
;
41 /* This structure is used to pass information to
42 _bfd_elf_link_find_version_dependencies. */
44 struct elf_find_verdep_info
46 /* General link information. */
47 struct bfd_link_info
*info
;
48 /* The number of dependencies. */
50 /* Whether we had a failure. */
54 static bfd_boolean _bfd_elf_fix_symbol_flags
55 (struct elf_link_hash_entry
*, struct elf_info_failed
*);
58 _bfd_elf_section_for_symbol (struct elf_reloc_cookie
*cookie
,
59 unsigned long r_symndx
,
62 if (r_symndx
>= cookie
->locsymcount
63 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
65 struct elf_link_hash_entry
*h
;
67 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
69 while (h
->root
.type
== bfd_link_hash_indirect
70 || h
->root
.type
== bfd_link_hash_warning
)
71 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
73 if ((h
->root
.type
== bfd_link_hash_defined
74 || h
->root
.type
== bfd_link_hash_defweak
)
75 && discarded_section (h
->root
.u
.def
.section
))
76 return h
->root
.u
.def
.section
;
82 /* It's not a relocation against a global symbol,
83 but it could be a relocation against a local
84 symbol for a discarded section. */
86 Elf_Internal_Sym
*isym
;
88 /* Need to: get the symbol; get the section. */
89 isym
= &cookie
->locsyms
[r_symndx
];
90 isec
= bfd_section_from_elf_index (cookie
->abfd
, isym
->st_shndx
);
92 && discard
? discarded_section (isec
) : 1)
98 /* Define a symbol in a dynamic linkage section. */
100 struct elf_link_hash_entry
*
101 _bfd_elf_define_linkage_sym (bfd
*abfd
,
102 struct bfd_link_info
*info
,
106 struct elf_link_hash_entry
*h
;
107 struct bfd_link_hash_entry
*bh
;
108 const struct elf_backend_data
*bed
;
110 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, FALSE
);
113 /* Zap symbol defined in an as-needed lib that wasn't linked.
114 This is a symptom of a larger problem: Absolute symbols
115 defined in shared libraries can't be overridden, because we
116 lose the link to the bfd which is via the symbol section. */
117 h
->root
.type
= bfd_link_hash_new
;
121 bed
= get_elf_backend_data (abfd
);
122 if (!_bfd_generic_link_add_one_symbol (info
, abfd
, name
, BSF_GLOBAL
,
123 sec
, 0, NULL
, FALSE
, bed
->collect
,
126 h
= (struct elf_link_hash_entry
*) bh
;
129 h
->root
.linker_def
= 1;
130 h
->type
= STT_OBJECT
;
131 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
132 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
134 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
139 _bfd_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
143 struct elf_link_hash_entry
*h
;
144 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
145 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
147 /* This function may be called more than once. */
148 s
= bfd_get_linker_section (abfd
, ".got");
152 flags
= bed
->dynamic_sec_flags
;
154 s
= bfd_make_section_anyway_with_flags (abfd
,
155 (bed
->rela_plts_and_copies_p
156 ? ".rela.got" : ".rel.got"),
157 (bed
->dynamic_sec_flags
160 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
164 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
166 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
170 if (bed
->want_got_plt
)
172 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
174 || !bfd_set_section_alignment (abfd
, s
,
175 bed
->s
->log_file_align
))
180 /* The first bit of the global offset table is the header. */
181 s
->size
+= bed
->got_header_size
;
183 if (bed
->want_got_sym
)
185 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
186 (or .got.plt) section. We don't do this in the linker script
187 because we don't want to define the symbol if we are not creating
188 a global offset table. */
189 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
190 "_GLOBAL_OFFSET_TABLE_");
191 elf_hash_table (info
)->hgot
= h
;
199 /* Create a strtab to hold the dynamic symbol names. */
201 _bfd_elf_link_create_dynstrtab (bfd
*abfd
, struct bfd_link_info
*info
)
203 struct elf_link_hash_table
*hash_table
;
205 hash_table
= elf_hash_table (info
);
206 if (hash_table
->dynobj
== NULL
)
208 /* We may not set dynobj, an input file holding linker created
209 dynamic sections to abfd, which may be a dynamic object with
210 its own dynamic sections. We need to find a normal input file
211 to hold linker created sections if possible. */
212 if ((abfd
->flags
& (DYNAMIC
| BFD_PLUGIN
)) != 0)
215 for (ibfd
= info
->input_bfds
; ibfd
; ibfd
= ibfd
->link
.next
)
217 & (DYNAMIC
| BFD_LINKER_CREATED
| BFD_PLUGIN
)) == 0)
223 hash_table
->dynobj
= abfd
;
226 if (hash_table
->dynstr
== NULL
)
228 hash_table
->dynstr
= _bfd_elf_strtab_init ();
229 if (hash_table
->dynstr
== NULL
)
235 /* Create some sections which will be filled in with dynamic linking
236 information. ABFD is an input file which requires dynamic sections
237 to be created. The dynamic sections take up virtual memory space
238 when the final executable is run, so we need to create them before
239 addresses are assigned to the output sections. We work out the
240 actual contents and size of these sections later. */
243 _bfd_elf_link_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
247 const struct elf_backend_data
*bed
;
248 struct elf_link_hash_entry
*h
;
250 if (! is_elf_hash_table (info
->hash
))
253 if (elf_hash_table (info
)->dynamic_sections_created
)
256 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
259 abfd
= elf_hash_table (info
)->dynobj
;
260 bed
= get_elf_backend_data (abfd
);
262 flags
= bed
->dynamic_sec_flags
;
264 /* A dynamically linked executable has a .interp section, but a
265 shared library does not. */
266 if (bfd_link_executable (info
) && !info
->nointerp
)
268 s
= bfd_make_section_anyway_with_flags (abfd
, ".interp",
269 flags
| SEC_READONLY
);
274 /* Create sections to hold version informations. These are removed
275 if they are not needed. */
276 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_d",
277 flags
| SEC_READONLY
);
279 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
282 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version",
283 flags
| SEC_READONLY
);
285 || ! bfd_set_section_alignment (abfd
, s
, 1))
288 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_r",
289 flags
| SEC_READONLY
);
291 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
294 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynsym",
295 flags
| SEC_READONLY
);
297 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
299 elf_hash_table (info
)->dynsym
= s
;
301 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynstr",
302 flags
| SEC_READONLY
);
306 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynamic", flags
);
308 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
311 /* The special symbol _DYNAMIC is always set to the start of the
312 .dynamic section. We could set _DYNAMIC in a linker script, but we
313 only want to define it if we are, in fact, creating a .dynamic
314 section. We don't want to define it if there is no .dynamic
315 section, since on some ELF platforms the start up code examines it
316 to decide how to initialize the process. */
317 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "_DYNAMIC");
318 elf_hash_table (info
)->hdynamic
= h
;
324 s
= bfd_make_section_anyway_with_flags (abfd
, ".hash",
325 flags
| SEC_READONLY
);
327 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
329 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
332 if (info
->emit_gnu_hash
)
334 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.hash",
335 flags
| SEC_READONLY
);
337 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
339 /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section:
340 4 32-bit words followed by variable count of 64-bit words, then
341 variable count of 32-bit words. */
342 if (bed
->s
->arch_size
== 64)
343 elf_section_data (s
)->this_hdr
.sh_entsize
= 0;
345 elf_section_data (s
)->this_hdr
.sh_entsize
= 4;
348 /* Let the backend create the rest of the sections. This lets the
349 backend set the right flags. The backend will normally create
350 the .got and .plt sections. */
351 if (bed
->elf_backend_create_dynamic_sections
== NULL
352 || ! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
355 elf_hash_table (info
)->dynamic_sections_created
= TRUE
;
360 /* Create dynamic sections when linking against a dynamic object. */
363 _bfd_elf_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
365 flagword flags
, pltflags
;
366 struct elf_link_hash_entry
*h
;
368 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
369 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
371 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
372 .rel[a].bss sections. */
373 flags
= bed
->dynamic_sec_flags
;
376 if (bed
->plt_not_loaded
)
377 /* We do not clear SEC_ALLOC here because we still want the OS to
378 allocate space for the section; it's just that there's nothing
379 to read in from the object file. */
380 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
382 pltflags
|= SEC_ALLOC
| SEC_CODE
| SEC_LOAD
;
383 if (bed
->plt_readonly
)
384 pltflags
|= SEC_READONLY
;
386 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
388 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
392 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
394 if (bed
->want_plt_sym
)
396 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
397 "_PROCEDURE_LINKAGE_TABLE_");
398 elf_hash_table (info
)->hplt
= h
;
403 s
= bfd_make_section_anyway_with_flags (abfd
,
404 (bed
->rela_plts_and_copies_p
405 ? ".rela.plt" : ".rel.plt"),
406 flags
| SEC_READONLY
);
408 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
412 if (! _bfd_elf_create_got_section (abfd
, info
))
415 if (bed
->want_dynbss
)
417 /* The .dynbss section is a place to put symbols which are defined
418 by dynamic objects, are referenced by regular objects, and are
419 not functions. We must allocate space for them in the process
420 image and use a R_*_COPY reloc to tell the dynamic linker to
421 initialize them at run time. The linker script puts the .dynbss
422 section into the .bss section of the final image. */
423 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
424 (SEC_ALLOC
| SEC_LINKER_CREATED
));
428 /* The .rel[a].bss section holds copy relocs. This section is not
429 normally needed. We need to create it here, though, so that the
430 linker will map it to an output section. We can't just create it
431 only if we need it, because we will not know whether we need it
432 until we have seen all the input files, and the first time the
433 main linker code calls BFD after examining all the input files
434 (size_dynamic_sections) the input sections have already been
435 mapped to the output sections. If the section turns out not to
436 be needed, we can discard it later. We will never need this
437 section when generating a shared object, since they do not use
439 if (! bfd_link_pic (info
))
441 s
= bfd_make_section_anyway_with_flags (abfd
,
442 (bed
->rela_plts_and_copies_p
443 ? ".rela.bss" : ".rel.bss"),
444 flags
| SEC_READONLY
);
446 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
454 /* Record a new dynamic symbol. We record the dynamic symbols as we
455 read the input files, since we need to have a list of all of them
456 before we can determine the final sizes of the output sections.
457 Note that we may actually call this function even though we are not
458 going to output any dynamic symbols; in some cases we know that a
459 symbol should be in the dynamic symbol table, but only if there is
463 bfd_elf_link_record_dynamic_symbol (struct bfd_link_info
*info
,
464 struct elf_link_hash_entry
*h
)
466 if (h
->dynindx
== -1)
468 struct elf_strtab_hash
*dynstr
;
473 /* XXX: The ABI draft says the linker must turn hidden and
474 internal symbols into STB_LOCAL symbols when producing the
475 DSO. However, if ld.so honors st_other in the dynamic table,
476 this would not be necessary. */
477 switch (ELF_ST_VISIBILITY (h
->other
))
481 if (h
->root
.type
!= bfd_link_hash_undefined
482 && h
->root
.type
!= bfd_link_hash_undefweak
)
485 if (!elf_hash_table (info
)->is_relocatable_executable
)
493 h
->dynindx
= elf_hash_table (info
)->dynsymcount
;
494 ++elf_hash_table (info
)->dynsymcount
;
496 dynstr
= elf_hash_table (info
)->dynstr
;
499 /* Create a strtab to hold the dynamic symbol names. */
500 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
505 /* We don't put any version information in the dynamic string
507 name
= h
->root
.root
.string
;
508 p
= strchr (name
, ELF_VER_CHR
);
510 /* We know that the p points into writable memory. In fact,
511 there are only a few symbols that have read-only names, being
512 those like _GLOBAL_OFFSET_TABLE_ that are created specially
513 by the backends. Most symbols will have names pointing into
514 an ELF string table read from a file, or to objalloc memory. */
517 indx
= _bfd_elf_strtab_add (dynstr
, name
, p
!= NULL
);
522 if (indx
== (bfd_size_type
) -1)
524 h
->dynstr_index
= indx
;
530 /* Mark a symbol dynamic. */
533 bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info
*info
,
534 struct elf_link_hash_entry
*h
,
535 Elf_Internal_Sym
*sym
)
537 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
539 /* It may be called more than once on the same H. */
540 if(h
->dynamic
|| bfd_link_relocatable (info
))
543 if ((info
->dynamic_data
544 && (h
->type
== STT_OBJECT
545 || h
->type
== STT_COMMON
547 && (ELF_ST_TYPE (sym
->st_info
) == STT_OBJECT
548 || ELF_ST_TYPE (sym
->st_info
) == STT_COMMON
))))
550 && h
->root
.type
== bfd_link_hash_new
551 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
555 /* Record an assignment to a symbol made by a linker script. We need
556 this in case some dynamic object refers to this symbol. */
559 bfd_elf_record_link_assignment (bfd
*output_bfd
,
560 struct bfd_link_info
*info
,
565 struct elf_link_hash_entry
*h
, *hv
;
566 struct elf_link_hash_table
*htab
;
567 const struct elf_backend_data
*bed
;
569 if (!is_elf_hash_table (info
->hash
))
572 htab
= elf_hash_table (info
);
573 h
= elf_link_hash_lookup (htab
, name
, !provide
, TRUE
, FALSE
);
577 if (h
->versioned
== unknown
)
579 /* Set versioned if symbol version is unknown. */
580 char *version
= strrchr (name
, ELF_VER_CHR
);
583 if (version
> name
&& version
[-1] != ELF_VER_CHR
)
584 h
->versioned
= versioned_hidden
;
586 h
->versioned
= versioned
;
590 switch (h
->root
.type
)
592 case bfd_link_hash_defined
:
593 case bfd_link_hash_defweak
:
594 case bfd_link_hash_common
:
596 case bfd_link_hash_undefweak
:
597 case bfd_link_hash_undefined
:
598 /* Since we're defining the symbol, don't let it seem to have not
599 been defined. record_dynamic_symbol and size_dynamic_sections
600 may depend on this. */
601 h
->root
.type
= bfd_link_hash_new
;
602 if (h
->root
.u
.undef
.next
!= NULL
|| htab
->root
.undefs_tail
== &h
->root
)
603 bfd_link_repair_undef_list (&htab
->root
);
605 case bfd_link_hash_new
:
606 bfd_elf_link_mark_dynamic_symbol (info
, h
, NULL
);
609 case bfd_link_hash_indirect
:
610 /* We had a versioned symbol in a dynamic library. We make the
611 the versioned symbol point to this one. */
612 bed
= get_elf_backend_data (output_bfd
);
614 while (hv
->root
.type
== bfd_link_hash_indirect
615 || hv
->root
.type
== bfd_link_hash_warning
)
616 hv
= (struct elf_link_hash_entry
*) hv
->root
.u
.i
.link
;
617 /* We don't need to update h->root.u since linker will set them
619 h
->root
.type
= bfd_link_hash_undefined
;
620 hv
->root
.type
= bfd_link_hash_indirect
;
621 hv
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
622 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hv
);
624 case bfd_link_hash_warning
:
629 /* If this symbol is being provided by the linker script, and it is
630 currently defined by a dynamic object, but not by a regular
631 object, then mark it as undefined so that the generic linker will
632 force the correct value. */
636 h
->root
.type
= bfd_link_hash_undefined
;
638 /* If this symbol is not being provided by the linker script, and it is
639 currently defined by a dynamic object, but not by a regular object,
640 then clear out any version information because the symbol will not be
641 associated with the dynamic object any more. */
645 h
->verinfo
.verdef
= NULL
;
651 bed
= get_elf_backend_data (output_bfd
);
652 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
653 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
654 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
657 /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects
659 if (!bfd_link_relocatable (info
)
661 && (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
662 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
))
667 || bfd_link_dll (info
)
668 || elf_hash_table (info
)->is_relocatable_executable
)
671 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
674 /* If this is a weak defined symbol, and we know a corresponding
675 real symbol from the same dynamic object, make sure the real
676 symbol is also made into a dynamic symbol. */
677 if (h
->u
.weakdef
!= NULL
678 && h
->u
.weakdef
->dynindx
== -1)
680 if (! bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
688 /* Record a new local dynamic symbol. Returns 0 on failure, 1 on
689 success, and 2 on a failure caused by attempting to record a symbol
690 in a discarded section, eg. a discarded link-once section symbol. */
693 bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info
*info
,
698 struct elf_link_local_dynamic_entry
*entry
;
699 struct elf_link_hash_table
*eht
;
700 struct elf_strtab_hash
*dynstr
;
701 unsigned long dynstr_index
;
703 Elf_External_Sym_Shndx eshndx
;
704 char esym
[sizeof (Elf64_External_Sym
)];
706 if (! is_elf_hash_table (info
->hash
))
709 /* See if the entry exists already. */
710 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
711 if (entry
->input_bfd
== input_bfd
&& entry
->input_indx
== input_indx
)
714 amt
= sizeof (*entry
);
715 entry
= (struct elf_link_local_dynamic_entry
*) bfd_alloc (input_bfd
, amt
);
719 /* Go find the symbol, so that we can find it's name. */
720 if (!bfd_elf_get_elf_syms (input_bfd
, &elf_tdata (input_bfd
)->symtab_hdr
,
721 1, input_indx
, &entry
->isym
, esym
, &eshndx
))
723 bfd_release (input_bfd
, entry
);
727 if (entry
->isym
.st_shndx
!= SHN_UNDEF
728 && entry
->isym
.st_shndx
< SHN_LORESERVE
)
732 s
= bfd_section_from_elf_index (input_bfd
, entry
->isym
.st_shndx
);
733 if (s
== NULL
|| bfd_is_abs_section (s
->output_section
))
735 /* We can still bfd_release here as nothing has done another
736 bfd_alloc. We can't do this later in this function. */
737 bfd_release (input_bfd
, entry
);
742 name
= (bfd_elf_string_from_elf_section
743 (input_bfd
, elf_tdata (input_bfd
)->symtab_hdr
.sh_link
,
744 entry
->isym
.st_name
));
746 dynstr
= elf_hash_table (info
)->dynstr
;
749 /* Create a strtab to hold the dynamic symbol names. */
750 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
755 dynstr_index
= _bfd_elf_strtab_add (dynstr
, name
, FALSE
);
756 if (dynstr_index
== (unsigned long) -1)
758 entry
->isym
.st_name
= dynstr_index
;
760 eht
= elf_hash_table (info
);
762 entry
->next
= eht
->dynlocal
;
763 eht
->dynlocal
= entry
;
764 entry
->input_bfd
= input_bfd
;
765 entry
->input_indx
= input_indx
;
768 /* Whatever binding the symbol had before, it's now local. */
770 = ELF_ST_INFO (STB_LOCAL
, ELF_ST_TYPE (entry
->isym
.st_info
));
772 /* The dynindx will be set at the end of size_dynamic_sections. */
777 /* Return the dynindex of a local dynamic symbol. */
780 _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info
*info
,
784 struct elf_link_local_dynamic_entry
*e
;
786 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
787 if (e
->input_bfd
== input_bfd
&& e
->input_indx
== input_indx
)
792 /* This function is used to renumber the dynamic symbols, if some of
793 them are removed because they are marked as local. This is called
794 via elf_link_hash_traverse. */
797 elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
800 size_t *count
= (size_t *) data
;
805 if (h
->dynindx
!= -1)
806 h
->dynindx
= ++(*count
);
812 /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with
813 STB_LOCAL binding. */
816 elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
819 size_t *count
= (size_t *) data
;
821 if (!h
->forced_local
)
824 if (h
->dynindx
!= -1)
825 h
->dynindx
= ++(*count
);
830 /* Return true if the dynamic symbol for a given section should be
831 omitted when creating a shared library. */
833 _bfd_elf_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
834 struct bfd_link_info
*info
,
837 struct elf_link_hash_table
*htab
;
840 switch (elf_section_data (p
)->this_hdr
.sh_type
)
844 /* If sh_type is yet undecided, assume it could be
845 SHT_PROGBITS/SHT_NOBITS. */
847 htab
= elf_hash_table (info
);
848 if (p
== htab
->tls_sec
)
851 if (htab
->text_index_section
!= NULL
)
852 return p
!= htab
->text_index_section
&& p
!= htab
->data_index_section
;
854 return (htab
->dynobj
!= NULL
855 && (ip
= bfd_get_linker_section (htab
->dynobj
, p
->name
)) != NULL
856 && ip
->output_section
== p
);
858 /* There shouldn't be section relative relocations
859 against any other section. */
865 /* Assign dynsym indices. In a shared library we generate a section
866 symbol for each output section, which come first. Next come symbols
867 which have been forced to local binding. Then all of the back-end
868 allocated local dynamic syms, followed by the rest of the global
872 _bfd_elf_link_renumber_dynsyms (bfd
*output_bfd
,
873 struct bfd_link_info
*info
,
874 unsigned long *section_sym_count
)
876 unsigned long dynsymcount
= 0;
878 if (bfd_link_pic (info
)
879 || elf_hash_table (info
)->is_relocatable_executable
)
881 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
883 for (p
= output_bfd
->sections
; p
; p
= p
->next
)
884 if ((p
->flags
& SEC_EXCLUDE
) == 0
885 && (p
->flags
& SEC_ALLOC
) != 0
886 && !(*bed
->elf_backend_omit_section_dynsym
) (output_bfd
, info
, p
))
887 elf_section_data (p
)->dynindx
= ++dynsymcount
;
889 elf_section_data (p
)->dynindx
= 0;
891 *section_sym_count
= dynsymcount
;
893 elf_link_hash_traverse (elf_hash_table (info
),
894 elf_link_renumber_local_hash_table_dynsyms
,
897 if (elf_hash_table (info
)->dynlocal
)
899 struct elf_link_local_dynamic_entry
*p
;
900 for (p
= elf_hash_table (info
)->dynlocal
; p
; p
= p
->next
)
901 p
->dynindx
= ++dynsymcount
;
904 elf_link_hash_traverse (elf_hash_table (info
),
905 elf_link_renumber_hash_table_dynsyms
,
908 /* There is an unused NULL entry at the head of the table which we
909 must account for in our count even if the table is empty since it
910 is intended for the mandatory DT_SYMTAB tag (.dynsym section) in
914 elf_hash_table (info
)->dynsymcount
= dynsymcount
;
918 /* Merge st_other field. */
921 elf_merge_st_other (bfd
*abfd
, struct elf_link_hash_entry
*h
,
922 const Elf_Internal_Sym
*isym
, asection
*sec
,
923 bfd_boolean definition
, bfd_boolean dynamic
)
925 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
927 /* If st_other has a processor-specific meaning, specific
928 code might be needed here. */
929 if (bed
->elf_backend_merge_symbol_attribute
)
930 (*bed
->elf_backend_merge_symbol_attribute
) (h
, isym
, definition
,
935 unsigned symvis
= ELF_ST_VISIBILITY (isym
->st_other
);
936 unsigned hvis
= ELF_ST_VISIBILITY (h
->other
);
938 /* Keep the most constraining visibility. Leave the remainder
939 of the st_other field to elf_backend_merge_symbol_attribute. */
940 if (symvis
- 1 < hvis
- 1)
941 h
->other
= symvis
| (h
->other
& ~ELF_ST_VISIBILITY (-1));
944 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_DEFAULT
945 && (sec
->flags
& SEC_READONLY
) == 0)
946 h
->protected_def
= 1;
949 /* This function is called when we want to merge a new symbol with an
950 existing symbol. It handles the various cases which arise when we
951 find a definition in a dynamic object, or when there is already a
952 definition in a dynamic object. The new symbol is described by
953 NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table
954 entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK
955 if the old symbol was weak. We set POLD_ALIGNMENT to the alignment
956 of an old common symbol. We set OVERRIDE if the old symbol is
957 overriding a new definition. We set TYPE_CHANGE_OK if it is OK for
958 the type to change. We set SIZE_CHANGE_OK if it is OK for the size
959 to change. By OK to change, we mean that we shouldn't warn if the
960 type or size does change. */
963 _bfd_elf_merge_symbol (bfd
*abfd
,
964 struct bfd_link_info
*info
,
966 Elf_Internal_Sym
*sym
,
969 struct elf_link_hash_entry
**sym_hash
,
971 bfd_boolean
*pold_weak
,
972 unsigned int *pold_alignment
,
974 bfd_boolean
*override
,
975 bfd_boolean
*type_change_ok
,
976 bfd_boolean
*size_change_ok
,
977 bfd_boolean
*matched
)
979 asection
*sec
, *oldsec
;
980 struct elf_link_hash_entry
*h
;
981 struct elf_link_hash_entry
*hi
;
982 struct elf_link_hash_entry
*flip
;
985 bfd_boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
986 bfd_boolean newweak
, oldweak
, newfunc
, oldfunc
;
987 const struct elf_backend_data
*bed
;
994 bind
= ELF_ST_BIND (sym
->st_info
);
996 if (! bfd_is_und_section (sec
))
997 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, FALSE
, FALSE
);
999 h
= ((struct elf_link_hash_entry
*)
1000 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, TRUE
, FALSE
, FALSE
));
1005 bed
= get_elf_backend_data (abfd
);
1007 /* NEW_VERSION is the symbol version of the new symbol. */
1008 if (h
->versioned
!= unversioned
)
1010 /* Symbol version is unknown or versioned. */
1011 new_version
= strrchr (name
, ELF_VER_CHR
);
1014 if (h
->versioned
== unknown
)
1016 if (new_version
> name
&& new_version
[-1] != ELF_VER_CHR
)
1017 h
->versioned
= versioned_hidden
;
1019 h
->versioned
= versioned
;
1022 if (new_version
[0] == '\0')
1026 h
->versioned
= unversioned
;
1031 /* For merging, we only care about real symbols. But we need to make
1032 sure that indirect symbol dynamic flags are updated. */
1034 while (h
->root
.type
== bfd_link_hash_indirect
1035 || h
->root
.type
== bfd_link_hash_warning
)
1036 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1040 if (hi
== h
|| h
->root
.type
== bfd_link_hash_new
)
1044 /* OLD_HIDDEN is true if the existing symbol is only visible
1045 to the symbol with the same symbol version. NEW_HIDDEN is
1046 true if the new symbol is only visible to the symbol with
1047 the same symbol version. */
1048 bfd_boolean old_hidden
= h
->versioned
== versioned_hidden
;
1049 bfd_boolean new_hidden
= hi
->versioned
== versioned_hidden
;
1050 if (!old_hidden
&& !new_hidden
)
1051 /* The new symbol matches the existing symbol if both
1056 /* OLD_VERSION is the symbol version of the existing
1060 if (h
->versioned
>= versioned
)
1061 old_version
= strrchr (h
->root
.root
.string
,
1066 /* The new symbol matches the existing symbol if they
1067 have the same symbol version. */
1068 *matched
= (old_version
== new_version
1069 || (old_version
!= NULL
1070 && new_version
!= NULL
1071 && strcmp (old_version
, new_version
) == 0));
1076 /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the
1081 switch (h
->root
.type
)
1086 case bfd_link_hash_undefined
:
1087 case bfd_link_hash_undefweak
:
1088 oldbfd
= h
->root
.u
.undef
.abfd
;
1091 case bfd_link_hash_defined
:
1092 case bfd_link_hash_defweak
:
1093 oldbfd
= h
->root
.u
.def
.section
->owner
;
1094 oldsec
= h
->root
.u
.def
.section
;
1097 case bfd_link_hash_common
:
1098 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
1099 oldsec
= h
->root
.u
.c
.p
->section
;
1101 *pold_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1104 if (poldbfd
&& *poldbfd
== NULL
)
1107 /* Differentiate strong and weak symbols. */
1108 newweak
= bind
== STB_WEAK
;
1109 oldweak
= (h
->root
.type
== bfd_link_hash_defweak
1110 || h
->root
.type
== bfd_link_hash_undefweak
);
1112 *pold_weak
= oldweak
;
1114 /* This code is for coping with dynamic objects, and is only useful
1115 if we are doing an ELF link. */
1116 if (!(*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
1119 /* We have to check it for every instance since the first few may be
1120 references and not all compilers emit symbol type for undefined
1122 bfd_elf_link_mark_dynamic_symbol (info
, h
, sym
);
1124 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
1125 respectively, is from a dynamic object. */
1127 newdyn
= (abfd
->flags
& DYNAMIC
) != 0;
1129 /* ref_dynamic_nonweak and dynamic_def flags track actual undefined
1130 syms and defined syms in dynamic libraries respectively.
1131 ref_dynamic on the other hand can be set for a symbol defined in
1132 a dynamic library, and def_dynamic may not be set; When the
1133 definition in a dynamic lib is overridden by a definition in the
1134 executable use of the symbol in the dynamic lib becomes a
1135 reference to the executable symbol. */
1138 if (bfd_is_und_section (sec
))
1140 if (bind
!= STB_WEAK
)
1142 h
->ref_dynamic_nonweak
= 1;
1143 hi
->ref_dynamic_nonweak
= 1;
1148 /* Update the existing symbol only if they match. */
1151 hi
->dynamic_def
= 1;
1155 /* If we just created the symbol, mark it as being an ELF symbol.
1156 Other than that, there is nothing to do--there is no merge issue
1157 with a newly defined symbol--so we just return. */
1159 if (h
->root
.type
== bfd_link_hash_new
)
1165 /* In cases involving weak versioned symbols, we may wind up trying
1166 to merge a symbol with itself. Catch that here, to avoid the
1167 confusion that results if we try to override a symbol with
1168 itself. The additional tests catch cases like
1169 _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
1170 dynamic object, which we do want to handle here. */
1172 && (newweak
|| oldweak
)
1173 && ((abfd
->flags
& DYNAMIC
) == 0
1174 || !h
->def_regular
))
1179 olddyn
= (oldbfd
->flags
& DYNAMIC
) != 0;
1180 else if (oldsec
!= NULL
)
1182 /* This handles the special SHN_MIPS_{TEXT,DATA} section
1183 indices used by MIPS ELF. */
1184 olddyn
= (oldsec
->symbol
->flags
& BSF_DYNAMIC
) != 0;
1187 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
1188 respectively, appear to be a definition rather than reference. */
1190 newdef
= !bfd_is_und_section (sec
) && !bfd_is_com_section (sec
);
1192 olddef
= (h
->root
.type
!= bfd_link_hash_undefined
1193 && h
->root
.type
!= bfd_link_hash_undefweak
1194 && h
->root
.type
!= bfd_link_hash_common
);
1196 /* NEWFUNC and OLDFUNC indicate whether the new or old symbol,
1197 respectively, appear to be a function. */
1199 newfunc
= (ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1200 && bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)));
1202 oldfunc
= (h
->type
!= STT_NOTYPE
1203 && bed
->is_function_type (h
->type
));
1205 /* If creating a default indirect symbol ("foo" or "foo@") from a
1206 dynamic versioned definition ("foo@@") skip doing so if there is
1207 an existing regular definition with a different type. We don't
1208 want, for example, a "time" variable in the executable overriding
1209 a "time" function in a shared library. */
1210 if (pold_alignment
== NULL
1214 && (olddef
|| h
->root
.type
== bfd_link_hash_common
)
1215 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1216 && ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1217 && h
->type
!= STT_NOTYPE
1218 && !(newfunc
&& oldfunc
))
1224 /* Check TLS symbols. We don't check undefined symbols introduced
1225 by "ld -u" which have no type (and oldbfd NULL), and we don't
1226 check symbols from plugins because they also have no type. */
1228 && (oldbfd
->flags
& BFD_PLUGIN
) == 0
1229 && (abfd
->flags
& BFD_PLUGIN
) == 0
1230 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1231 && (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
|| h
->type
== STT_TLS
))
1234 bfd_boolean ntdef
, tdef
;
1235 asection
*ntsec
, *tsec
;
1237 if (h
->type
== STT_TLS
)
1257 (*_bfd_error_handler
)
1258 (_("%s: TLS definition in %B section %A "
1259 "mismatches non-TLS definition in %B section %A"),
1260 tbfd
, tsec
, ntbfd
, ntsec
, h
->root
.root
.string
);
1261 else if (!tdef
&& !ntdef
)
1262 (*_bfd_error_handler
)
1263 (_("%s: TLS reference in %B "
1264 "mismatches non-TLS reference in %B"),
1265 tbfd
, ntbfd
, h
->root
.root
.string
);
1267 (*_bfd_error_handler
)
1268 (_("%s: TLS definition in %B section %A "
1269 "mismatches non-TLS reference in %B"),
1270 tbfd
, tsec
, ntbfd
, h
->root
.root
.string
);
1272 (*_bfd_error_handler
)
1273 (_("%s: TLS reference in %B "
1274 "mismatches non-TLS definition in %B section %A"),
1275 tbfd
, ntbfd
, ntsec
, h
->root
.root
.string
);
1277 bfd_set_error (bfd_error_bad_value
);
1281 /* If the old symbol has non-default visibility, we ignore the new
1282 definition from a dynamic object. */
1284 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1285 && !bfd_is_und_section (sec
))
1288 /* Make sure this symbol is dynamic. */
1290 hi
->ref_dynamic
= 1;
1291 /* A protected symbol has external availability. Make sure it is
1292 recorded as dynamic.
1294 FIXME: Should we check type and size for protected symbol? */
1295 if (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
1296 return bfd_elf_link_record_dynamic_symbol (info
, h
);
1301 && ELF_ST_VISIBILITY (sym
->st_other
) != STV_DEFAULT
1304 /* If the new symbol with non-default visibility comes from a
1305 relocatable file and the old definition comes from a dynamic
1306 object, we remove the old definition. */
1307 if (hi
->root
.type
== bfd_link_hash_indirect
)
1309 /* Handle the case where the old dynamic definition is
1310 default versioned. We need to copy the symbol info from
1311 the symbol with default version to the normal one if it
1312 was referenced before. */
1315 hi
->root
.type
= h
->root
.type
;
1316 h
->root
.type
= bfd_link_hash_indirect
;
1317 (*bed
->elf_backend_copy_indirect_symbol
) (info
, hi
, h
);
1319 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1320 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1322 /* If the new symbol is hidden or internal, completely undo
1323 any dynamic link state. */
1324 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1325 h
->forced_local
= 0;
1332 /* FIXME: Should we check type and size for protected symbol? */
1342 /* If the old symbol was undefined before, then it will still be
1343 on the undefs list. If the new symbol is undefined or
1344 common, we can't make it bfd_link_hash_new here, because new
1345 undefined or common symbols will be added to the undefs list
1346 by _bfd_generic_link_add_one_symbol. Symbols may not be
1347 added twice to the undefs list. Also, if the new symbol is
1348 undefweak then we don't want to lose the strong undef. */
1349 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1351 h
->root
.type
= bfd_link_hash_undefined
;
1352 h
->root
.u
.undef
.abfd
= abfd
;
1356 h
->root
.type
= bfd_link_hash_new
;
1357 h
->root
.u
.undef
.abfd
= NULL
;
1360 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1362 /* If the new symbol is hidden or internal, completely undo
1363 any dynamic link state. */
1364 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1365 h
->forced_local
= 0;
1371 /* FIXME: Should we check type and size for protected symbol? */
1377 /* If a new weak symbol definition comes from a regular file and the
1378 old symbol comes from a dynamic library, we treat the new one as
1379 strong. Similarly, an old weak symbol definition from a regular
1380 file is treated as strong when the new symbol comes from a dynamic
1381 library. Further, an old weak symbol from a dynamic library is
1382 treated as strong if the new symbol is from a dynamic library.
1383 This reflects the way glibc's ld.so works.
1385 Do this before setting *type_change_ok or *size_change_ok so that
1386 we warn properly when dynamic library symbols are overridden. */
1388 if (newdef
&& !newdyn
&& olddyn
)
1390 if (olddef
&& newdyn
)
1393 /* Allow changes between different types of function symbol. */
1394 if (newfunc
&& oldfunc
)
1395 *type_change_ok
= TRUE
;
1397 /* It's OK to change the type if either the existing symbol or the
1398 new symbol is weak. A type change is also OK if the old symbol
1399 is undefined and the new symbol is defined. */
1404 && h
->root
.type
== bfd_link_hash_undefined
))
1405 *type_change_ok
= TRUE
;
1407 /* It's OK to change the size if either the existing symbol or the
1408 new symbol is weak, or if the old symbol is undefined. */
1411 || h
->root
.type
== bfd_link_hash_undefined
)
1412 *size_change_ok
= TRUE
;
1414 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
1415 symbol, respectively, appears to be a common symbol in a dynamic
1416 object. If a symbol appears in an uninitialized section, and is
1417 not weak, and is not a function, then it may be a common symbol
1418 which was resolved when the dynamic object was created. We want
1419 to treat such symbols specially, because they raise special
1420 considerations when setting the symbol size: if the symbol
1421 appears as a common symbol in a regular object, and the size in
1422 the regular object is larger, we must make sure that we use the
1423 larger size. This problematic case can always be avoided in C,
1424 but it must be handled correctly when using Fortran shared
1427 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
1428 likewise for OLDDYNCOMMON and OLDDEF.
1430 Note that this test is just a heuristic, and that it is quite
1431 possible to have an uninitialized symbol in a shared object which
1432 is really a definition, rather than a common symbol. This could
1433 lead to some minor confusion when the symbol really is a common
1434 symbol in some regular object. However, I think it will be
1440 && (sec
->flags
& SEC_ALLOC
) != 0
1441 && (sec
->flags
& SEC_LOAD
) == 0
1444 newdyncommon
= TRUE
;
1446 newdyncommon
= FALSE
;
1450 && h
->root
.type
== bfd_link_hash_defined
1452 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
1453 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
1456 olddyncommon
= TRUE
;
1458 olddyncommon
= FALSE
;
1460 /* We now know everything about the old and new symbols. We ask the
1461 backend to check if we can merge them. */
1462 if (bed
->merge_symbol
!= NULL
)
1464 if (!bed
->merge_symbol (h
, sym
, psec
, newdef
, olddef
, oldbfd
, oldsec
))
1469 /* If both the old and the new symbols look like common symbols in a
1470 dynamic object, set the size of the symbol to the larger of the
1475 && sym
->st_size
!= h
->size
)
1477 /* Since we think we have two common symbols, issue a multiple
1478 common warning if desired. Note that we only warn if the
1479 size is different. If the size is the same, we simply let
1480 the old symbol override the new one as normally happens with
1481 symbols defined in dynamic objects. */
1483 (*info
->callbacks
->multiple_common
) (info
, &h
->root
, abfd
,
1484 bfd_link_hash_common
, sym
->st_size
);
1485 if (sym
->st_size
> h
->size
)
1486 h
->size
= sym
->st_size
;
1488 *size_change_ok
= TRUE
;
1491 /* If we are looking at a dynamic object, and we have found a
1492 definition, we need to see if the symbol was already defined by
1493 some other object. If so, we want to use the existing
1494 definition, and we do not want to report a multiple symbol
1495 definition error; we do this by clobbering *PSEC to be
1496 bfd_und_section_ptr.
1498 We treat a common symbol as a definition if the symbol in the
1499 shared library is a function, since common symbols always
1500 represent variables; this can cause confusion in principle, but
1501 any such confusion would seem to indicate an erroneous program or
1502 shared library. We also permit a common symbol in a regular
1503 object to override a weak symbol in a shared object. A common
1504 symbol in executable also overrides a symbol in a shared object. */
1509 || (h
->root
.type
== bfd_link_hash_common
1512 || (!olddyn
&& bfd_link_executable (info
))))))
1516 newdyncommon
= FALSE
;
1518 *psec
= sec
= bfd_und_section_ptr
;
1519 *size_change_ok
= TRUE
;
1521 /* If we get here when the old symbol is a common symbol, then
1522 we are explicitly letting it override a weak symbol or
1523 function in a dynamic object, and we don't want to warn about
1524 a type change. If the old symbol is a defined symbol, a type
1525 change warning may still be appropriate. */
1527 if (h
->root
.type
== bfd_link_hash_common
)
1528 *type_change_ok
= TRUE
;
1531 /* Handle the special case of an old common symbol merging with a
1532 new symbol which looks like a common symbol in a shared object.
1533 We change *PSEC and *PVALUE to make the new symbol look like a
1534 common symbol, and let _bfd_generic_link_add_one_symbol do the
1538 && h
->root
.type
== bfd_link_hash_common
)
1542 newdyncommon
= FALSE
;
1543 *pvalue
= sym
->st_size
;
1544 *psec
= sec
= bed
->common_section (oldsec
);
1545 *size_change_ok
= TRUE
;
1548 /* Skip weak definitions of symbols that are already defined. */
1549 if (newdef
&& olddef
&& newweak
)
1551 /* Don't skip new non-IR weak syms. */
1552 if (!(oldbfd
!= NULL
1553 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1554 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1560 /* Merge st_other. If the symbol already has a dynamic index,
1561 but visibility says it should not be visible, turn it into a
1563 elf_merge_st_other (abfd
, h
, sym
, sec
, newdef
, newdyn
);
1564 if (h
->dynindx
!= -1)
1565 switch (ELF_ST_VISIBILITY (h
->other
))
1569 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1574 /* If the old symbol is from a dynamic object, and the new symbol is
1575 a definition which is not from a dynamic object, then the new
1576 symbol overrides the old symbol. Symbols from regular files
1577 always take precedence over symbols from dynamic objects, even if
1578 they are defined after the dynamic object in the link.
1580 As above, we again permit a common symbol in a regular object to
1581 override a definition in a shared object if the shared object
1582 symbol is a function or is weak. */
1587 || (bfd_is_com_section (sec
)
1588 && (oldweak
|| oldfunc
)))
1593 /* Change the hash table entry to undefined, and let
1594 _bfd_generic_link_add_one_symbol do the right thing with the
1597 h
->root
.type
= bfd_link_hash_undefined
;
1598 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1599 *size_change_ok
= TRUE
;
1602 olddyncommon
= FALSE
;
1604 /* We again permit a type change when a common symbol may be
1605 overriding a function. */
1607 if (bfd_is_com_section (sec
))
1611 /* If a common symbol overrides a function, make sure
1612 that it isn't defined dynamically nor has type
1615 h
->type
= STT_NOTYPE
;
1617 *type_change_ok
= TRUE
;
1620 if (hi
->root
.type
== bfd_link_hash_indirect
)
1623 /* This union may have been set to be non-NULL when this symbol
1624 was seen in a dynamic object. We must force the union to be
1625 NULL, so that it is correct for a regular symbol. */
1626 h
->verinfo
.vertree
= NULL
;
1629 /* Handle the special case of a new common symbol merging with an
1630 old symbol that looks like it might be a common symbol defined in
1631 a shared object. Note that we have already handled the case in
1632 which a new common symbol should simply override the definition
1633 in the shared library. */
1636 && bfd_is_com_section (sec
)
1639 /* It would be best if we could set the hash table entry to a
1640 common symbol, but we don't know what to use for the section
1641 or the alignment. */
1642 (*info
->callbacks
->multiple_common
) (info
, &h
->root
, abfd
,
1643 bfd_link_hash_common
, sym
->st_size
);
1645 /* If the presumed common symbol in the dynamic object is
1646 larger, pretend that the new symbol has its size. */
1648 if (h
->size
> *pvalue
)
1651 /* We need to remember the alignment required by the symbol
1652 in the dynamic object. */
1653 BFD_ASSERT (pold_alignment
);
1654 *pold_alignment
= h
->root
.u
.def
.section
->alignment_power
;
1657 olddyncommon
= FALSE
;
1659 h
->root
.type
= bfd_link_hash_undefined
;
1660 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1662 *size_change_ok
= TRUE
;
1663 *type_change_ok
= TRUE
;
1665 if (hi
->root
.type
== bfd_link_hash_indirect
)
1668 h
->verinfo
.vertree
= NULL
;
1673 /* Handle the case where we had a versioned symbol in a dynamic
1674 library and now find a definition in a normal object. In this
1675 case, we make the versioned symbol point to the normal one. */
1676 flip
->root
.type
= h
->root
.type
;
1677 flip
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
1678 h
->root
.type
= bfd_link_hash_indirect
;
1679 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) flip
;
1680 (*bed
->elf_backend_copy_indirect_symbol
) (info
, flip
, h
);
1684 flip
->ref_dynamic
= 1;
1691 /* This function is called to create an indirect symbol from the
1692 default for the symbol with the default version if needed. The
1693 symbol is described by H, NAME, SYM, SEC, and VALUE. We
1694 set DYNSYM if the new indirect symbol is dynamic. */
1697 _bfd_elf_add_default_symbol (bfd
*abfd
,
1698 struct bfd_link_info
*info
,
1699 struct elf_link_hash_entry
*h
,
1701 Elf_Internal_Sym
*sym
,
1705 bfd_boolean
*dynsym
)
1707 bfd_boolean type_change_ok
;
1708 bfd_boolean size_change_ok
;
1711 struct elf_link_hash_entry
*hi
;
1712 struct bfd_link_hash_entry
*bh
;
1713 const struct elf_backend_data
*bed
;
1714 bfd_boolean collect
;
1715 bfd_boolean dynamic
;
1716 bfd_boolean override
;
1718 size_t len
, shortlen
;
1720 bfd_boolean matched
;
1722 if (h
->versioned
== unversioned
|| h
->versioned
== versioned_hidden
)
1725 /* If this symbol has a version, and it is the default version, we
1726 create an indirect symbol from the default name to the fully
1727 decorated name. This will cause external references which do not
1728 specify a version to be bound to this version of the symbol. */
1729 p
= strchr (name
, ELF_VER_CHR
);
1730 if (h
->versioned
== unknown
)
1734 h
->versioned
= unversioned
;
1739 if (p
[1] != ELF_VER_CHR
)
1741 h
->versioned
= versioned_hidden
;
1745 h
->versioned
= versioned
;
1750 /* PR ld/19073: We may see an unversioned definition after the
1756 bed
= get_elf_backend_data (abfd
);
1757 collect
= bed
->collect
;
1758 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
1760 shortlen
= p
- name
;
1761 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
1762 if (shortname
== NULL
)
1764 memcpy (shortname
, name
, shortlen
);
1765 shortname
[shortlen
] = '\0';
1767 /* We are going to create a new symbol. Merge it with any existing
1768 symbol with this name. For the purposes of the merge, act as
1769 though we were defining the symbol we just defined, although we
1770 actually going to define an indirect symbol. */
1771 type_change_ok
= FALSE
;
1772 size_change_ok
= FALSE
;
1775 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1776 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
1777 &type_change_ok
, &size_change_ok
, &matched
))
1783 if (hi
->def_regular
)
1785 /* If the undecorated symbol will have a version added by a
1786 script different to H, then don't indirect to/from the
1787 undecorated symbol. This isn't ideal because we may not yet
1788 have seen symbol versions, if given by a script on the
1789 command line rather than via --version-script. */
1790 if (hi
->verinfo
.vertree
== NULL
&& info
->version_info
!= NULL
)
1795 = bfd_find_version_for_sym (info
->version_info
,
1796 hi
->root
.root
.string
, &hide
);
1797 if (hi
->verinfo
.vertree
!= NULL
&& hide
)
1799 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
1803 if (hi
->verinfo
.vertree
!= NULL
1804 && strcmp (p
+ 1 + (p
[1] == '@'), hi
->verinfo
.vertree
->name
) != 0)
1810 /* Add the default symbol if not performing a relocatable link. */
1811 if (! bfd_link_relocatable (info
))
1814 if (! (_bfd_generic_link_add_one_symbol
1815 (info
, abfd
, shortname
, BSF_INDIRECT
,
1816 bfd_ind_section_ptr
,
1817 0, name
, FALSE
, collect
, &bh
)))
1819 hi
= (struct elf_link_hash_entry
*) bh
;
1824 /* In this case the symbol named SHORTNAME is overriding the
1825 indirect symbol we want to add. We were planning on making
1826 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
1827 is the name without a version. NAME is the fully versioned
1828 name, and it is the default version.
1830 Overriding means that we already saw a definition for the
1831 symbol SHORTNAME in a regular object, and it is overriding
1832 the symbol defined in the dynamic object.
1834 When this happens, we actually want to change NAME, the
1835 symbol we just added, to refer to SHORTNAME. This will cause
1836 references to NAME in the shared object to become references
1837 to SHORTNAME in the regular object. This is what we expect
1838 when we override a function in a shared object: that the
1839 references in the shared object will be mapped to the
1840 definition in the regular object. */
1842 while (hi
->root
.type
== bfd_link_hash_indirect
1843 || hi
->root
.type
== bfd_link_hash_warning
)
1844 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1846 h
->root
.type
= bfd_link_hash_indirect
;
1847 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1851 hi
->ref_dynamic
= 1;
1855 if (! bfd_elf_link_record_dynamic_symbol (info
, hi
))
1860 /* Now set HI to H, so that the following code will set the
1861 other fields correctly. */
1865 /* Check if HI is a warning symbol. */
1866 if (hi
->root
.type
== bfd_link_hash_warning
)
1867 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1869 /* If there is a duplicate definition somewhere, then HI may not
1870 point to an indirect symbol. We will have reported an error to
1871 the user in that case. */
1873 if (hi
->root
.type
== bfd_link_hash_indirect
)
1875 struct elf_link_hash_entry
*ht
;
1877 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1878 (*bed
->elf_backend_copy_indirect_symbol
) (info
, ht
, hi
);
1880 /* A reference to the SHORTNAME symbol from a dynamic library
1881 will be satisfied by the versioned symbol at runtime. In
1882 effect, we have a reference to the versioned symbol. */
1883 ht
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
1884 hi
->dynamic_def
|= ht
->dynamic_def
;
1886 /* See if the new flags lead us to realize that the symbol must
1892 if (! bfd_link_executable (info
)
1899 if (hi
->ref_regular
)
1905 /* We also need to define an indirection from the nondefault version
1909 len
= strlen (name
);
1910 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, len
);
1911 if (shortname
== NULL
)
1913 memcpy (shortname
, name
, shortlen
);
1914 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
1916 /* Once again, merge with any existing symbol. */
1917 type_change_ok
= FALSE
;
1918 size_change_ok
= FALSE
;
1920 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1921 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
1922 &type_change_ok
, &size_change_ok
, &matched
))
1930 /* Here SHORTNAME is a versioned name, so we don't expect to see
1931 the type of override we do in the case above unless it is
1932 overridden by a versioned definition. */
1933 if (hi
->root
.type
!= bfd_link_hash_defined
1934 && hi
->root
.type
!= bfd_link_hash_defweak
)
1935 (*_bfd_error_handler
)
1936 (_("%B: unexpected redefinition of indirect versioned symbol `%s'"),
1942 if (! (_bfd_generic_link_add_one_symbol
1943 (info
, abfd
, shortname
, BSF_INDIRECT
,
1944 bfd_ind_section_ptr
, 0, name
, FALSE
, collect
, &bh
)))
1946 hi
= (struct elf_link_hash_entry
*) bh
;
1948 /* If there is a duplicate definition somewhere, then HI may not
1949 point to an indirect symbol. We will have reported an error
1950 to the user in that case. */
1952 if (hi
->root
.type
== bfd_link_hash_indirect
)
1954 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
1955 h
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
1956 hi
->dynamic_def
|= h
->dynamic_def
;
1958 /* See if the new flags lead us to realize that the symbol
1964 if (! bfd_link_executable (info
)
1970 if (hi
->ref_regular
)
1980 /* This routine is used to export all defined symbols into the dynamic
1981 symbol table. It is called via elf_link_hash_traverse. */
1984 _bfd_elf_export_symbol (struct elf_link_hash_entry
*h
, void *data
)
1986 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
1988 /* Ignore indirect symbols. These are added by the versioning code. */
1989 if (h
->root
.type
== bfd_link_hash_indirect
)
1992 /* Ignore this if we won't export it. */
1993 if (!eif
->info
->export_dynamic
&& !h
->dynamic
)
1996 if (h
->dynindx
== -1
1997 && (h
->def_regular
|| h
->ref_regular
)
1998 && ! bfd_hide_sym_by_version (eif
->info
->version_info
,
1999 h
->root
.root
.string
))
2001 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2011 /* Look through the symbols which are defined in other shared
2012 libraries and referenced here. Update the list of version
2013 dependencies. This will be put into the .gnu.version_r section.
2014 This function is called via elf_link_hash_traverse. */
2017 _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry
*h
,
2020 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
2021 Elf_Internal_Verneed
*t
;
2022 Elf_Internal_Vernaux
*a
;
2025 /* We only care about symbols defined in shared objects with version
2030 || h
->verinfo
.verdef
== NULL
2031 || (elf_dyn_lib_class (h
->verinfo
.verdef
->vd_bfd
)
2032 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
| DYN_NO_NEEDED
)))
2035 /* See if we already know about this version. */
2036 for (t
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
2040 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
2043 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2044 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
2050 /* This is a new version. Add it to tree we are building. */
2055 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
2058 rinfo
->failed
= TRUE
;
2062 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
2063 t
->vn_nextref
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
2064 elf_tdata (rinfo
->info
->output_bfd
)->verref
= t
;
2068 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
2071 rinfo
->failed
= TRUE
;
2075 /* Note that we are copying a string pointer here, and testing it
2076 above. If bfd_elf_string_from_elf_section is ever changed to
2077 discard the string data when low in memory, this will have to be
2079 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
2081 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
2082 a
->vna_nextptr
= t
->vn_auxptr
;
2084 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
2087 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
2094 /* Figure out appropriate versions for all the symbols. We may not
2095 have the version number script until we have read all of the input
2096 files, so until that point we don't know which symbols should be
2097 local. This function is called via elf_link_hash_traverse. */
2100 _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry
*h
, void *data
)
2102 struct elf_info_failed
*sinfo
;
2103 struct bfd_link_info
*info
;
2104 const struct elf_backend_data
*bed
;
2105 struct elf_info_failed eif
;
2109 sinfo
= (struct elf_info_failed
*) data
;
2112 /* Fix the symbol flags. */
2115 if (! _bfd_elf_fix_symbol_flags (h
, &eif
))
2118 sinfo
->failed
= TRUE
;
2122 /* We only need version numbers for symbols defined in regular
2124 if (!h
->def_regular
)
2127 bed
= get_elf_backend_data (info
->output_bfd
);
2128 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
2129 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
2131 struct bfd_elf_version_tree
*t
;
2134 if (*p
== ELF_VER_CHR
)
2137 /* If there is no version string, we can just return out. */
2141 /* Look for the version. If we find it, it is no longer weak. */
2142 for (t
= sinfo
->info
->version_info
; t
!= NULL
; t
= t
->next
)
2144 if (strcmp (t
->name
, p
) == 0)
2148 struct bfd_elf_version_expr
*d
;
2150 len
= p
- h
->root
.root
.string
;
2151 alc
= (char *) bfd_malloc (len
);
2154 sinfo
->failed
= TRUE
;
2157 memcpy (alc
, h
->root
.root
.string
, len
- 1);
2158 alc
[len
- 1] = '\0';
2159 if (alc
[len
- 2] == ELF_VER_CHR
)
2160 alc
[len
- 2] = '\0';
2162 h
->verinfo
.vertree
= t
;
2166 if (t
->globals
.list
!= NULL
)
2167 d
= (*t
->match
) (&t
->globals
, NULL
, alc
);
2169 /* See if there is anything to force this symbol to
2171 if (d
== NULL
&& t
->locals
.list
!= NULL
)
2173 d
= (*t
->match
) (&t
->locals
, NULL
, alc
);
2176 && ! info
->export_dynamic
)
2177 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2185 /* If we are building an application, we need to create a
2186 version node for this version. */
2187 if (t
== NULL
&& bfd_link_executable (info
))
2189 struct bfd_elf_version_tree
**pp
;
2192 /* If we aren't going to export this symbol, we don't need
2193 to worry about it. */
2194 if (h
->dynindx
== -1)
2198 t
= (struct bfd_elf_version_tree
*) bfd_zalloc (info
->output_bfd
, amt
);
2201 sinfo
->failed
= TRUE
;
2206 t
->name_indx
= (unsigned int) -1;
2210 /* Don't count anonymous version tag. */
2211 if (sinfo
->info
->version_info
!= NULL
2212 && sinfo
->info
->version_info
->vernum
== 0)
2214 for (pp
= &sinfo
->info
->version_info
;
2218 t
->vernum
= version_index
;
2222 h
->verinfo
.vertree
= t
;
2226 /* We could not find the version for a symbol when
2227 generating a shared archive. Return an error. */
2228 (*_bfd_error_handler
)
2229 (_("%B: version node not found for symbol %s"),
2230 info
->output_bfd
, h
->root
.root
.string
);
2231 bfd_set_error (bfd_error_bad_value
);
2232 sinfo
->failed
= TRUE
;
2237 /* If we don't have a version for this symbol, see if we can find
2239 if (h
->verinfo
.vertree
== NULL
&& sinfo
->info
->version_info
!= NULL
)
2244 = bfd_find_version_for_sym (sinfo
->info
->version_info
,
2245 h
->root
.root
.string
, &hide
);
2246 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2247 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2253 /* Read and swap the relocs from the section indicated by SHDR. This
2254 may be either a REL or a RELA section. The relocations are
2255 translated into RELA relocations and stored in INTERNAL_RELOCS,
2256 which should have already been allocated to contain enough space.
2257 The EXTERNAL_RELOCS are a buffer where the external form of the
2258 relocations should be stored.
2260 Returns FALSE if something goes wrong. */
2263 elf_link_read_relocs_from_section (bfd
*abfd
,
2265 Elf_Internal_Shdr
*shdr
,
2266 void *external_relocs
,
2267 Elf_Internal_Rela
*internal_relocs
)
2269 const struct elf_backend_data
*bed
;
2270 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2271 const bfd_byte
*erela
;
2272 const bfd_byte
*erelaend
;
2273 Elf_Internal_Rela
*irela
;
2274 Elf_Internal_Shdr
*symtab_hdr
;
2277 /* Position ourselves at the start of the section. */
2278 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2281 /* Read the relocations. */
2282 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2285 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2286 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
2288 bed
= get_elf_backend_data (abfd
);
2290 /* Convert the external relocations to the internal format. */
2291 if (shdr
->sh_entsize
== bed
->s
->sizeof_rel
)
2292 swap_in
= bed
->s
->swap_reloc_in
;
2293 else if (shdr
->sh_entsize
== bed
->s
->sizeof_rela
)
2294 swap_in
= bed
->s
->swap_reloca_in
;
2297 bfd_set_error (bfd_error_wrong_format
);
2301 erela
= (const bfd_byte
*) external_relocs
;
2302 erelaend
= erela
+ shdr
->sh_size
;
2303 irela
= internal_relocs
;
2304 while (erela
< erelaend
)
2308 (*swap_in
) (abfd
, erela
, irela
);
2309 r_symndx
= ELF32_R_SYM (irela
->r_info
);
2310 if (bed
->s
->arch_size
== 64)
2314 if ((size_t) r_symndx
>= nsyms
)
2316 (*_bfd_error_handler
)
2317 (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)"
2318 " for offset 0x%lx in section `%A'"),
2320 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2321 bfd_set_error (bfd_error_bad_value
);
2325 else if (r_symndx
!= STN_UNDEF
)
2327 (*_bfd_error_handler
)
2328 (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'"
2329 " when the object file has no symbol table"),
2331 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2332 bfd_set_error (bfd_error_bad_value
);
2335 irela
+= bed
->s
->int_rels_per_ext_rel
;
2336 erela
+= shdr
->sh_entsize
;
2342 /* Read and swap the relocs for a section O. They may have been
2343 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2344 not NULL, they are used as buffers to read into. They are known to
2345 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2346 the return value is allocated using either malloc or bfd_alloc,
2347 according to the KEEP_MEMORY argument. If O has two relocation
2348 sections (both REL and RELA relocations), then the REL_HDR
2349 relocations will appear first in INTERNAL_RELOCS, followed by the
2350 RELA_HDR relocations. */
2353 _bfd_elf_link_read_relocs (bfd
*abfd
,
2355 void *external_relocs
,
2356 Elf_Internal_Rela
*internal_relocs
,
2357 bfd_boolean keep_memory
)
2359 void *alloc1
= NULL
;
2360 Elf_Internal_Rela
*alloc2
= NULL
;
2361 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2362 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
2363 Elf_Internal_Rela
*internal_rela_relocs
;
2365 if (esdo
->relocs
!= NULL
)
2366 return esdo
->relocs
;
2368 if (o
->reloc_count
== 0)
2371 if (internal_relocs
== NULL
)
2375 size
= o
->reloc_count
;
2376 size
*= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
2378 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2380 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2381 if (internal_relocs
== NULL
)
2385 if (external_relocs
== NULL
)
2387 bfd_size_type size
= 0;
2390 size
+= esdo
->rel
.hdr
->sh_size
;
2392 size
+= esdo
->rela
.hdr
->sh_size
;
2394 alloc1
= bfd_malloc (size
);
2397 external_relocs
= alloc1
;
2400 internal_rela_relocs
= internal_relocs
;
2403 if (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rel
.hdr
,
2407 external_relocs
= (((bfd_byte
*) external_relocs
)
2408 + esdo
->rel
.hdr
->sh_size
);
2409 internal_rela_relocs
+= (NUM_SHDR_ENTRIES (esdo
->rel
.hdr
)
2410 * bed
->s
->int_rels_per_ext_rel
);
2414 && (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rela
.hdr
,
2416 internal_rela_relocs
)))
2419 /* Cache the results for next time, if we can. */
2421 esdo
->relocs
= internal_relocs
;
2426 /* Don't free alloc2, since if it was allocated we are passing it
2427 back (under the name of internal_relocs). */
2429 return internal_relocs
;
2437 bfd_release (abfd
, alloc2
);
2444 /* Compute the size of, and allocate space for, REL_HDR which is the
2445 section header for a section containing relocations for O. */
2448 _bfd_elf_link_size_reloc_section (bfd
*abfd
,
2449 struct bfd_elf_section_reloc_data
*reldata
)
2451 Elf_Internal_Shdr
*rel_hdr
= reldata
->hdr
;
2453 /* That allows us to calculate the size of the section. */
2454 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reldata
->count
;
2456 /* The contents field must last into write_object_contents, so we
2457 allocate it with bfd_alloc rather than malloc. Also since we
2458 cannot be sure that the contents will actually be filled in,
2459 we zero the allocated space. */
2460 rel_hdr
->contents
= (unsigned char *) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
2461 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
2464 if (reldata
->hashes
== NULL
&& reldata
->count
)
2466 struct elf_link_hash_entry
**p
;
2468 p
= ((struct elf_link_hash_entry
**)
2469 bfd_zmalloc (reldata
->count
* sizeof (*p
)));
2473 reldata
->hashes
= p
;
2479 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
2480 originated from the section given by INPUT_REL_HDR) to the
2484 _bfd_elf_link_output_relocs (bfd
*output_bfd
,
2485 asection
*input_section
,
2486 Elf_Internal_Shdr
*input_rel_hdr
,
2487 Elf_Internal_Rela
*internal_relocs
,
2488 struct elf_link_hash_entry
**rel_hash
2491 Elf_Internal_Rela
*irela
;
2492 Elf_Internal_Rela
*irelaend
;
2494 struct bfd_elf_section_reloc_data
*output_reldata
;
2495 asection
*output_section
;
2496 const struct elf_backend_data
*bed
;
2497 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2498 struct bfd_elf_section_data
*esdo
;
2500 output_section
= input_section
->output_section
;
2502 bed
= get_elf_backend_data (output_bfd
);
2503 esdo
= elf_section_data (output_section
);
2504 if (esdo
->rel
.hdr
&& esdo
->rel
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2506 output_reldata
= &esdo
->rel
;
2507 swap_out
= bed
->s
->swap_reloc_out
;
2509 else if (esdo
->rela
.hdr
2510 && esdo
->rela
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2512 output_reldata
= &esdo
->rela
;
2513 swap_out
= bed
->s
->swap_reloca_out
;
2517 (*_bfd_error_handler
)
2518 (_("%B: relocation size mismatch in %B section %A"),
2519 output_bfd
, input_section
->owner
, input_section
);
2520 bfd_set_error (bfd_error_wrong_format
);
2524 erel
= output_reldata
->hdr
->contents
;
2525 erel
+= output_reldata
->count
* input_rel_hdr
->sh_entsize
;
2526 irela
= internal_relocs
;
2527 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
2528 * bed
->s
->int_rels_per_ext_rel
);
2529 while (irela
< irelaend
)
2531 (*swap_out
) (output_bfd
, irela
, erel
);
2532 irela
+= bed
->s
->int_rels_per_ext_rel
;
2533 erel
+= input_rel_hdr
->sh_entsize
;
2536 /* Bump the counter, so that we know where to add the next set of
2538 output_reldata
->count
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
2543 /* Make weak undefined symbols in PIE dynamic. */
2546 _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info
*info
,
2547 struct elf_link_hash_entry
*h
)
2549 if (bfd_link_pie (info
)
2551 && h
->root
.type
== bfd_link_hash_undefweak
)
2552 return bfd_elf_link_record_dynamic_symbol (info
, h
);
2557 /* Fix up the flags for a symbol. This handles various cases which
2558 can only be fixed after all the input files are seen. This is
2559 currently called by both adjust_dynamic_symbol and
2560 assign_sym_version, which is unnecessary but perhaps more robust in
2561 the face of future changes. */
2564 _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry
*h
,
2565 struct elf_info_failed
*eif
)
2567 const struct elf_backend_data
*bed
;
2569 /* If this symbol was mentioned in a non-ELF file, try to set
2570 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2571 permit a non-ELF file to correctly refer to a symbol defined in
2572 an ELF dynamic object. */
2575 while (h
->root
.type
== bfd_link_hash_indirect
)
2576 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2578 if (h
->root
.type
!= bfd_link_hash_defined
2579 && h
->root
.type
!= bfd_link_hash_defweak
)
2582 h
->ref_regular_nonweak
= 1;
2586 if (h
->root
.u
.def
.section
->owner
!= NULL
2587 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2588 == bfd_target_elf_flavour
))
2591 h
->ref_regular_nonweak
= 1;
2597 if (h
->dynindx
== -1
2601 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2610 /* Unfortunately, NON_ELF is only correct if the symbol
2611 was first seen in a non-ELF file. Fortunately, if the symbol
2612 was first seen in an ELF file, we're probably OK unless the
2613 symbol was defined in a non-ELF file. Catch that case here.
2614 FIXME: We're still in trouble if the symbol was first seen in
2615 a dynamic object, and then later in a non-ELF regular object. */
2616 if ((h
->root
.type
== bfd_link_hash_defined
2617 || h
->root
.type
== bfd_link_hash_defweak
)
2619 && (h
->root
.u
.def
.section
->owner
!= NULL
2620 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2621 != bfd_target_elf_flavour
)
2622 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
2623 && !h
->def_dynamic
)))
2627 /* Backend specific symbol fixup. */
2628 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
2629 if (bed
->elf_backend_fixup_symbol
2630 && !(*bed
->elf_backend_fixup_symbol
) (eif
->info
, h
))
2633 /* If this is a final link, and the symbol was defined as a common
2634 symbol in a regular object file, and there was no definition in
2635 any dynamic object, then the linker will have allocated space for
2636 the symbol in a common section but the DEF_REGULAR
2637 flag will not have been set. */
2638 if (h
->root
.type
== bfd_link_hash_defined
2642 && (h
->root
.u
.def
.section
->owner
->flags
& (DYNAMIC
| BFD_PLUGIN
)) == 0)
2645 /* If -Bsymbolic was used (which means to bind references to global
2646 symbols to the definition within the shared object), and this
2647 symbol was defined in a regular object, then it actually doesn't
2648 need a PLT entry. Likewise, if the symbol has non-default
2649 visibility. If the symbol has hidden or internal visibility, we
2650 will force it local. */
2652 && bfd_link_pic (eif
->info
)
2653 && is_elf_hash_table (eif
->info
->hash
)
2654 && (SYMBOLIC_BIND (eif
->info
, h
)
2655 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2658 bfd_boolean force_local
;
2660 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
2661 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
2662 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
2665 /* If a weak undefined symbol has non-default visibility, we also
2666 hide it from the dynamic linker. */
2667 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2668 && h
->root
.type
== bfd_link_hash_undefweak
)
2669 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2671 /* If this is a weak defined symbol in a dynamic object, and we know
2672 the real definition in the dynamic object, copy interesting flags
2673 over to the real definition. */
2674 if (h
->u
.weakdef
!= NULL
)
2676 /* If the real definition is defined by a regular object file,
2677 don't do anything special. See the longer description in
2678 _bfd_elf_adjust_dynamic_symbol, below. */
2679 if (h
->u
.weakdef
->def_regular
)
2680 h
->u
.weakdef
= NULL
;
2683 struct elf_link_hash_entry
*weakdef
= h
->u
.weakdef
;
2685 while (h
->root
.type
== bfd_link_hash_indirect
)
2686 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2688 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2689 || h
->root
.type
== bfd_link_hash_defweak
);
2690 BFD_ASSERT (weakdef
->def_dynamic
);
2691 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
2692 || weakdef
->root
.type
== bfd_link_hash_defweak
);
2693 (*bed
->elf_backend_copy_indirect_symbol
) (eif
->info
, weakdef
, h
);
2700 /* Make the backend pick a good value for a dynamic symbol. This is
2701 called via elf_link_hash_traverse, and also calls itself
2705 _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry
*h
, void *data
)
2707 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2709 const struct elf_backend_data
*bed
;
2711 if (! is_elf_hash_table (eif
->info
->hash
))
2714 /* Ignore indirect symbols. These are added by the versioning code. */
2715 if (h
->root
.type
== bfd_link_hash_indirect
)
2718 /* Fix the symbol flags. */
2719 if (! _bfd_elf_fix_symbol_flags (h
, eif
))
2722 /* If this symbol does not require a PLT entry, and it is not
2723 defined by a dynamic object, or is not referenced by a regular
2724 object, ignore it. We do have to handle a weak defined symbol,
2725 even if no regular object refers to it, if we decided to add it
2726 to the dynamic symbol table. FIXME: Do we normally need to worry
2727 about symbols which are defined by one dynamic object and
2728 referenced by another one? */
2730 && h
->type
!= STT_GNU_IFUNC
2734 && (h
->u
.weakdef
== NULL
|| h
->u
.weakdef
->dynindx
== -1))))
2736 h
->plt
= elf_hash_table (eif
->info
)->init_plt_offset
;
2740 /* If we've already adjusted this symbol, don't do it again. This
2741 can happen via a recursive call. */
2742 if (h
->dynamic_adjusted
)
2745 /* Don't look at this symbol again. Note that we must set this
2746 after checking the above conditions, because we may look at a
2747 symbol once, decide not to do anything, and then get called
2748 recursively later after REF_REGULAR is set below. */
2749 h
->dynamic_adjusted
= 1;
2751 /* If this is a weak definition, and we know a real definition, and
2752 the real symbol is not itself defined by a regular object file,
2753 then get a good value for the real definition. We handle the
2754 real symbol first, for the convenience of the backend routine.
2756 Note that there is a confusing case here. If the real definition
2757 is defined by a regular object file, we don't get the real symbol
2758 from the dynamic object, but we do get the weak symbol. If the
2759 processor backend uses a COPY reloc, then if some routine in the
2760 dynamic object changes the real symbol, we will not see that
2761 change in the corresponding weak symbol. This is the way other
2762 ELF linkers work as well, and seems to be a result of the shared
2765 I will clarify this issue. Most SVR4 shared libraries define the
2766 variable _timezone and define timezone as a weak synonym. The
2767 tzset call changes _timezone. If you write
2768 extern int timezone;
2770 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
2771 you might expect that, since timezone is a synonym for _timezone,
2772 the same number will print both times. However, if the processor
2773 backend uses a COPY reloc, then actually timezone will be copied
2774 into your process image, and, since you define _timezone
2775 yourself, _timezone will not. Thus timezone and _timezone will
2776 wind up at different memory locations. The tzset call will set
2777 _timezone, leaving timezone unchanged. */
2779 if (h
->u
.weakdef
!= NULL
)
2781 /* If we get to this point, there is an implicit reference to
2782 H->U.WEAKDEF by a regular object file via the weak symbol H. */
2783 h
->u
.weakdef
->ref_regular
= 1;
2785 /* Ensure that the backend adjust_dynamic_symbol function sees
2786 H->U.WEAKDEF before H by recursively calling ourselves. */
2787 if (! _bfd_elf_adjust_dynamic_symbol (h
->u
.weakdef
, eif
))
2791 /* If a symbol has no type and no size and does not require a PLT
2792 entry, then we are probably about to do the wrong thing here: we
2793 are probably going to create a COPY reloc for an empty object.
2794 This case can arise when a shared object is built with assembly
2795 code, and the assembly code fails to set the symbol type. */
2797 && h
->type
== STT_NOTYPE
2799 (*_bfd_error_handler
)
2800 (_("warning: type and size of dynamic symbol `%s' are not defined"),
2801 h
->root
.root
.string
);
2803 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
2804 bed
= get_elf_backend_data (dynobj
);
2806 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
2815 /* Adjust the dynamic symbol, H, for copy in the dynamic bss section,
2819 _bfd_elf_adjust_dynamic_copy (struct bfd_link_info
*info
,
2820 struct elf_link_hash_entry
*h
,
2823 unsigned int power_of_two
;
2825 asection
*sec
= h
->root
.u
.def
.section
;
2827 /* The section aligment of definition is the maximum alignment
2828 requirement of symbols defined in the section. Since we don't
2829 know the symbol alignment requirement, we start with the
2830 maximum alignment and check low bits of the symbol address
2831 for the minimum alignment. */
2832 power_of_two
= bfd_get_section_alignment (sec
->owner
, sec
);
2833 mask
= ((bfd_vma
) 1 << power_of_two
) - 1;
2834 while ((h
->root
.u
.def
.value
& mask
) != 0)
2840 if (power_of_two
> bfd_get_section_alignment (dynbss
->owner
,
2843 /* Adjust the section alignment if needed. */
2844 if (! bfd_set_section_alignment (dynbss
->owner
, dynbss
,
2849 /* We make sure that the symbol will be aligned properly. */
2850 dynbss
->size
= BFD_ALIGN (dynbss
->size
, mask
+ 1);
2852 /* Define the symbol as being at this point in DYNBSS. */
2853 h
->root
.u
.def
.section
= dynbss
;
2854 h
->root
.u
.def
.value
= dynbss
->size
;
2856 /* Increment the size of DYNBSS to make room for the symbol. */
2857 dynbss
->size
+= h
->size
;
2859 /* No error if extern_protected_data is true. */
2860 if (h
->protected_def
2861 && (!info
->extern_protected_data
2862 || (info
->extern_protected_data
< 0
2863 && !get_elf_backend_data (dynbss
->owner
)->extern_protected_data
)))
2864 info
->callbacks
->einfo
2865 (_("%P: copy reloc against protected `%T' is dangerous\n"),
2866 h
->root
.root
.string
);
2871 /* Adjust all external symbols pointing into SEC_MERGE sections
2872 to reflect the object merging within the sections. */
2875 _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry
*h
, void *data
)
2879 if ((h
->root
.type
== bfd_link_hash_defined
2880 || h
->root
.type
== bfd_link_hash_defweak
)
2881 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
2882 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
2884 bfd
*output_bfd
= (bfd
*) data
;
2886 h
->root
.u
.def
.value
=
2887 _bfd_merged_section_offset (output_bfd
,
2888 &h
->root
.u
.def
.section
,
2889 elf_section_data (sec
)->sec_info
,
2890 h
->root
.u
.def
.value
);
2896 /* Returns false if the symbol referred to by H should be considered
2897 to resolve local to the current module, and true if it should be
2898 considered to bind dynamically. */
2901 _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
2902 struct bfd_link_info
*info
,
2903 bfd_boolean not_local_protected
)
2905 bfd_boolean binding_stays_local_p
;
2906 const struct elf_backend_data
*bed
;
2907 struct elf_link_hash_table
*hash_table
;
2912 while (h
->root
.type
== bfd_link_hash_indirect
2913 || h
->root
.type
== bfd_link_hash_warning
)
2914 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2916 /* If it was forced local, then clearly it's not dynamic. */
2917 if (h
->dynindx
== -1)
2919 if (h
->forced_local
)
2922 /* Identify the cases where name binding rules say that a
2923 visible symbol resolves locally. */
2924 binding_stays_local_p
= (bfd_link_executable (info
)
2925 || SYMBOLIC_BIND (info
, h
));
2927 switch (ELF_ST_VISIBILITY (h
->other
))
2934 hash_table
= elf_hash_table (info
);
2935 if (!is_elf_hash_table (hash_table
))
2938 bed
= get_elf_backend_data (hash_table
->dynobj
);
2940 /* Proper resolution for function pointer equality may require
2941 that these symbols perhaps be resolved dynamically, even though
2942 we should be resolving them to the current module. */
2943 if (!not_local_protected
|| !bed
->is_function_type (h
->type
))
2944 binding_stays_local_p
= TRUE
;
2951 /* If it isn't defined locally, then clearly it's dynamic. */
2952 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2955 /* Otherwise, the symbol is dynamic if binding rules don't tell
2956 us that it remains local. */
2957 return !binding_stays_local_p
;
2960 /* Return true if the symbol referred to by H should be considered
2961 to resolve local to the current module, and false otherwise. Differs
2962 from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of
2963 undefined symbols. The two functions are virtually identical except
2964 for the place where forced_local and dynindx == -1 are tested. If
2965 either of those tests are true, _bfd_elf_dynamic_symbol_p will say
2966 the symbol is local, while _bfd_elf_symbol_refs_local_p will say
2967 the symbol is local only for defined symbols.
2968 It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as
2969 !_bfd_elf_symbol_refs_local_p, except that targets differ in their
2970 treatment of undefined weak symbols. For those that do not make
2971 undefined weak symbols dynamic, both functions may return false. */
2974 _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry
*h
,
2975 struct bfd_link_info
*info
,
2976 bfd_boolean local_protected
)
2978 const struct elf_backend_data
*bed
;
2979 struct elf_link_hash_table
*hash_table
;
2981 /* If it's a local sym, of course we resolve locally. */
2985 /* STV_HIDDEN or STV_INTERNAL ones must be local. */
2986 if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
2987 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
2990 /* Common symbols that become definitions don't get the DEF_REGULAR
2991 flag set, so test it first, and don't bail out. */
2992 if (ELF_COMMON_DEF_P (h
))
2994 /* If we don't have a definition in a regular file, then we can't
2995 resolve locally. The sym is either undefined or dynamic. */
2996 else if (!h
->def_regular
)
2999 /* Forced local symbols resolve locally. */
3000 if (h
->forced_local
)
3003 /* As do non-dynamic symbols. */
3004 if (h
->dynindx
== -1)
3007 /* At this point, we know the symbol is defined and dynamic. In an
3008 executable it must resolve locally, likewise when building symbolic
3009 shared libraries. */
3010 if (bfd_link_executable (info
) || SYMBOLIC_BIND (info
, h
))
3013 /* Now deal with defined dynamic symbols in shared libraries. Ones
3014 with default visibility might not resolve locally. */
3015 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3018 hash_table
= elf_hash_table (info
);
3019 if (!is_elf_hash_table (hash_table
))
3022 bed
= get_elf_backend_data (hash_table
->dynobj
);
3024 /* If extern_protected_data is false, STV_PROTECTED non-function
3025 symbols are local. */
3026 if ((!info
->extern_protected_data
3027 || (info
->extern_protected_data
< 0
3028 && !bed
->extern_protected_data
))
3029 && !bed
->is_function_type (h
->type
))
3032 /* Function pointer equality tests may require that STV_PROTECTED
3033 symbols be treated as dynamic symbols. If the address of a
3034 function not defined in an executable is set to that function's
3035 plt entry in the executable, then the address of the function in
3036 a shared library must also be the plt entry in the executable. */
3037 return local_protected
;
3040 /* Caches some TLS segment info, and ensures that the TLS segment vma is
3041 aligned. Returns the first TLS output section. */
3043 struct bfd_section
*
3044 _bfd_elf_tls_setup (bfd
*obfd
, struct bfd_link_info
*info
)
3046 struct bfd_section
*sec
, *tls
;
3047 unsigned int align
= 0;
3049 for (sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3050 if ((sec
->flags
& SEC_THREAD_LOCAL
) != 0)
3054 for (; sec
!= NULL
&& (sec
->flags
& SEC_THREAD_LOCAL
) != 0; sec
= sec
->next
)
3055 if (sec
->alignment_power
> align
)
3056 align
= sec
->alignment_power
;
3058 elf_hash_table (info
)->tls_sec
= tls
;
3060 /* Ensure the alignment of the first section is the largest alignment,
3061 so that the tls segment starts aligned. */
3063 tls
->alignment_power
= align
;
3068 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
3070 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
3071 Elf_Internal_Sym
*sym
)
3073 const struct elf_backend_data
*bed
;
3075 /* Local symbols do not count, but target specific ones might. */
3076 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
3077 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
3080 bed
= get_elf_backend_data (abfd
);
3081 /* Function symbols do not count. */
3082 if (bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)))
3085 /* If the section is undefined, then so is the symbol. */
3086 if (sym
->st_shndx
== SHN_UNDEF
)
3089 /* If the symbol is defined in the common section, then
3090 it is a common definition and so does not count. */
3091 if (bed
->common_definition (sym
))
3094 /* If the symbol is in a target specific section then we
3095 must rely upon the backend to tell us what it is. */
3096 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
3097 /* FIXME - this function is not coded yet:
3099 return _bfd_is_global_symbol_definition (abfd, sym);
3101 Instead for now assume that the definition is not global,
3102 Even if this is wrong, at least the linker will behave
3103 in the same way that it used to do. */
3109 /* Search the symbol table of the archive element of the archive ABFD
3110 whose archive map contains a mention of SYMDEF, and determine if
3111 the symbol is defined in this element. */
3113 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
3115 Elf_Internal_Shdr
* hdr
;
3116 bfd_size_type symcount
;
3117 bfd_size_type extsymcount
;
3118 bfd_size_type extsymoff
;
3119 Elf_Internal_Sym
*isymbuf
;
3120 Elf_Internal_Sym
*isym
;
3121 Elf_Internal_Sym
*isymend
;
3124 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
3128 /* Return FALSE if the object has been claimed by plugin. */
3129 if (abfd
->plugin_format
== bfd_plugin_yes
)
3132 if (! bfd_check_format (abfd
, bfd_object
))
3135 /* Select the appropriate symbol table. */
3136 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
3137 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3139 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3141 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
3143 /* The sh_info field of the symtab header tells us where the
3144 external symbols start. We don't care about the local symbols. */
3145 if (elf_bad_symtab (abfd
))
3147 extsymcount
= symcount
;
3152 extsymcount
= symcount
- hdr
->sh_info
;
3153 extsymoff
= hdr
->sh_info
;
3156 if (extsymcount
== 0)
3159 /* Read in the symbol table. */
3160 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3162 if (isymbuf
== NULL
)
3165 /* Scan the symbol table looking for SYMDEF. */
3167 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
3171 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3176 if (strcmp (name
, symdef
->name
) == 0)
3178 result
= is_global_data_symbol_definition (abfd
, isym
);
3188 /* Add an entry to the .dynamic table. */
3191 _bfd_elf_add_dynamic_entry (struct bfd_link_info
*info
,
3195 struct elf_link_hash_table
*hash_table
;
3196 const struct elf_backend_data
*bed
;
3198 bfd_size_type newsize
;
3199 bfd_byte
*newcontents
;
3200 Elf_Internal_Dyn dyn
;
3202 hash_table
= elf_hash_table (info
);
3203 if (! is_elf_hash_table (hash_table
))
3206 bed
= get_elf_backend_data (hash_table
->dynobj
);
3207 s
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3208 BFD_ASSERT (s
!= NULL
);
3210 newsize
= s
->size
+ bed
->s
->sizeof_dyn
;
3211 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
3212 if (newcontents
== NULL
)
3216 dyn
.d_un
.d_val
= val
;
3217 bed
->s
->swap_dyn_out (hash_table
->dynobj
, &dyn
, newcontents
+ s
->size
);
3220 s
->contents
= newcontents
;
3225 /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true,
3226 otherwise just check whether one already exists. Returns -1 on error,
3227 1 if a DT_NEEDED tag already exists, and 0 on success. */
3230 elf_add_dt_needed_tag (bfd
*abfd
,
3231 struct bfd_link_info
*info
,
3235 struct elf_link_hash_table
*hash_table
;
3236 bfd_size_type strindex
;
3238 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
3241 hash_table
= elf_hash_table (info
);
3242 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, soname
, FALSE
);
3243 if (strindex
== (bfd_size_type
) -1)
3246 if (_bfd_elf_strtab_refcount (hash_table
->dynstr
, strindex
) != 1)
3249 const struct elf_backend_data
*bed
;
3252 bed
= get_elf_backend_data (hash_table
->dynobj
);
3253 sdyn
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3255 for (extdyn
= sdyn
->contents
;
3256 extdyn
< sdyn
->contents
+ sdyn
->size
;
3257 extdyn
+= bed
->s
->sizeof_dyn
)
3259 Elf_Internal_Dyn dyn
;
3261 bed
->s
->swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3262 if (dyn
.d_tag
== DT_NEEDED
3263 && dyn
.d_un
.d_val
== strindex
)
3265 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3273 if (!_bfd_elf_link_create_dynamic_sections (hash_table
->dynobj
, info
))
3276 if (!_bfd_elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
3280 /* We were just checking for existence of the tag. */
3281 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3286 /* Return true if SONAME is on the needed list between NEEDED and STOP
3287 (or the end of list if STOP is NULL), and needed by a library that
3291 on_needed_list (const char *soname
,
3292 struct bfd_link_needed_list
*needed
,
3293 struct bfd_link_needed_list
*stop
)
3295 struct bfd_link_needed_list
*look
;
3296 for (look
= needed
; look
!= stop
; look
= look
->next
)
3297 if (strcmp (soname
, look
->name
) == 0
3298 && ((elf_dyn_lib_class (look
->by
) & DYN_AS_NEEDED
) == 0
3299 /* If needed by a library that itself is not directly
3300 needed, recursively check whether that library is
3301 indirectly needed. Since we add DT_NEEDED entries to
3302 the end of the list, library dependencies appear after
3303 the library. Therefore search prior to the current
3304 LOOK, preventing possible infinite recursion. */
3305 || on_needed_list (elf_dt_name (look
->by
), needed
, look
)))
3311 /* Sort symbol by value, section, and size. */
3313 elf_sort_symbol (const void *arg1
, const void *arg2
)
3315 const struct elf_link_hash_entry
*h1
;
3316 const struct elf_link_hash_entry
*h2
;
3317 bfd_signed_vma vdiff
;
3319 h1
= *(const struct elf_link_hash_entry
**) arg1
;
3320 h2
= *(const struct elf_link_hash_entry
**) arg2
;
3321 vdiff
= h1
->root
.u
.def
.value
- h2
->root
.u
.def
.value
;
3323 return vdiff
> 0 ? 1 : -1;
3326 int sdiff
= h1
->root
.u
.def
.section
->id
- h2
->root
.u
.def
.section
->id
;
3328 return sdiff
> 0 ? 1 : -1;
3330 vdiff
= h1
->size
- h2
->size
;
3331 return vdiff
== 0 ? 0 : vdiff
> 0 ? 1 : -1;
3334 /* This function is used to adjust offsets into .dynstr for
3335 dynamic symbols. This is called via elf_link_hash_traverse. */
3338 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
3340 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3342 if (h
->dynindx
!= -1)
3343 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3347 /* Assign string offsets in .dynstr, update all structures referencing
3351 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
3353 struct elf_link_hash_table
*hash_table
= elf_hash_table (info
);
3354 struct elf_link_local_dynamic_entry
*entry
;
3355 struct elf_strtab_hash
*dynstr
= hash_table
->dynstr
;
3356 bfd
*dynobj
= hash_table
->dynobj
;
3359 const struct elf_backend_data
*bed
;
3362 _bfd_elf_strtab_finalize (dynstr
);
3363 size
= _bfd_elf_strtab_size (dynstr
);
3365 bed
= get_elf_backend_data (dynobj
);
3366 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3367 BFD_ASSERT (sdyn
!= NULL
);
3369 /* Update all .dynamic entries referencing .dynstr strings. */
3370 for (extdyn
= sdyn
->contents
;
3371 extdyn
< sdyn
->contents
+ sdyn
->size
;
3372 extdyn
+= bed
->s
->sizeof_dyn
)
3374 Elf_Internal_Dyn dyn
;
3376 bed
->s
->swap_dyn_in (dynobj
, extdyn
, &dyn
);
3380 dyn
.d_un
.d_val
= size
;
3390 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3395 bed
->s
->swap_dyn_out (dynobj
, &dyn
, extdyn
);
3398 /* Now update local dynamic symbols. */
3399 for (entry
= hash_table
->dynlocal
; entry
; entry
= entry
->next
)
3400 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3401 entry
->isym
.st_name
);
3403 /* And the rest of dynamic symbols. */
3404 elf_link_hash_traverse (hash_table
, elf_adjust_dynstr_offsets
, dynstr
);
3406 /* Adjust version definitions. */
3407 if (elf_tdata (output_bfd
)->cverdefs
)
3412 Elf_Internal_Verdef def
;
3413 Elf_Internal_Verdaux defaux
;
3415 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
3419 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3421 p
+= sizeof (Elf_External_Verdef
);
3422 if (def
.vd_aux
!= sizeof (Elf_External_Verdef
))
3424 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3426 _bfd_elf_swap_verdaux_in (output_bfd
,
3427 (Elf_External_Verdaux
*) p
, &defaux
);
3428 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3430 _bfd_elf_swap_verdaux_out (output_bfd
,
3431 &defaux
, (Elf_External_Verdaux
*) p
);
3432 p
+= sizeof (Elf_External_Verdaux
);
3435 while (def
.vd_next
);
3438 /* Adjust version references. */
3439 if (elf_tdata (output_bfd
)->verref
)
3444 Elf_Internal_Verneed need
;
3445 Elf_Internal_Vernaux needaux
;
3447 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
3451 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3453 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3454 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3455 (Elf_External_Verneed
*) p
);
3456 p
+= sizeof (Elf_External_Verneed
);
3457 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3459 _bfd_elf_swap_vernaux_in (output_bfd
,
3460 (Elf_External_Vernaux
*) p
, &needaux
);
3461 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3463 _bfd_elf_swap_vernaux_out (output_bfd
,
3465 (Elf_External_Vernaux
*) p
);
3466 p
+= sizeof (Elf_External_Vernaux
);
3469 while (need
.vn_next
);
3475 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3476 The default is to only match when the INPUT and OUTPUT are exactly
3480 _bfd_elf_default_relocs_compatible (const bfd_target
*input
,
3481 const bfd_target
*output
)
3483 return input
== output
;
3486 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3487 This version is used when different targets for the same architecture
3488 are virtually identical. */
3491 _bfd_elf_relocs_compatible (const bfd_target
*input
,
3492 const bfd_target
*output
)
3494 const struct elf_backend_data
*obed
, *ibed
;
3496 if (input
== output
)
3499 ibed
= xvec_get_elf_backend_data (input
);
3500 obed
= xvec_get_elf_backend_data (output
);
3502 if (ibed
->arch
!= obed
->arch
)
3505 /* If both backends are using this function, deem them compatible. */
3506 return ibed
->relocs_compatible
== obed
->relocs_compatible
;
3509 /* Make a special call to the linker "notice" function to tell it that
3510 we are about to handle an as-needed lib, or have finished
3511 processing the lib. */
3514 _bfd_elf_notice_as_needed (bfd
*ibfd
,
3515 struct bfd_link_info
*info
,
3516 enum notice_asneeded_action act
)
3518 return (*info
->callbacks
->notice
) (info
, NULL
, NULL
, ibfd
, NULL
, act
, 0);
3521 /* Check relocations an ELF object file. */
3524 _bfd_elf_link_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
)
3526 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3527 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3529 /* If this object is the same format as the output object, and it is
3530 not a shared library, then let the backend look through the
3533 This is required to build global offset table entries and to
3534 arrange for dynamic relocs. It is not required for the
3535 particular common case of linking non PIC code, even when linking
3536 against shared libraries, but unfortunately there is no way of
3537 knowing whether an object file has been compiled PIC or not.
3538 Looking through the relocs is not particularly time consuming.
3539 The problem is that we must either (1) keep the relocs in memory,
3540 which causes the linker to require additional runtime memory or
3541 (2) read the relocs twice from the input file, which wastes time.
3542 This would be a good case for using mmap.
3544 I have no idea how to handle linking PIC code into a file of a
3545 different format. It probably can't be done. */
3546 if ((abfd
->flags
& DYNAMIC
) == 0
3547 && is_elf_hash_table (htab
)
3548 && bed
->check_relocs
!= NULL
3549 && elf_object_id (abfd
) == elf_hash_table_id (htab
)
3550 && (*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
3554 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3556 Elf_Internal_Rela
*internal_relocs
;
3559 /* Don't check relocations in excluded sections. */
3560 if ((o
->flags
& SEC_RELOC
) == 0
3561 || (o
->flags
& SEC_EXCLUDE
) != 0
3562 || o
->reloc_count
== 0
3563 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
3564 && (o
->flags
& SEC_DEBUGGING
) != 0)
3565 || bfd_is_abs_section (o
->output_section
))
3568 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
3570 if (internal_relocs
== NULL
)
3573 ok
= (*bed
->check_relocs
) (abfd
, info
, o
, internal_relocs
);
3575 if (elf_section_data (o
)->relocs
!= internal_relocs
)
3576 free (internal_relocs
);
3586 /* Add symbols from an ELF object file to the linker hash table. */
3589 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3591 Elf_Internal_Ehdr
*ehdr
;
3592 Elf_Internal_Shdr
*hdr
;
3593 bfd_size_type symcount
;
3594 bfd_size_type extsymcount
;
3595 bfd_size_type extsymoff
;
3596 struct elf_link_hash_entry
**sym_hash
;
3597 bfd_boolean dynamic
;
3598 Elf_External_Versym
*extversym
= NULL
;
3599 Elf_External_Versym
*ever
;
3600 struct elf_link_hash_entry
*weaks
;
3601 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
3602 bfd_size_type nondeflt_vers_cnt
= 0;
3603 Elf_Internal_Sym
*isymbuf
= NULL
;
3604 Elf_Internal_Sym
*isym
;
3605 Elf_Internal_Sym
*isymend
;
3606 const struct elf_backend_data
*bed
;
3607 bfd_boolean add_needed
;
3608 struct elf_link_hash_table
*htab
;
3610 void *alloc_mark
= NULL
;
3611 struct bfd_hash_entry
**old_table
= NULL
;
3612 unsigned int old_size
= 0;
3613 unsigned int old_count
= 0;
3614 void *old_tab
= NULL
;
3616 struct bfd_link_hash_entry
*old_undefs
= NULL
;
3617 struct bfd_link_hash_entry
*old_undefs_tail
= NULL
;
3618 void *old_strtab
= NULL
;
3621 bfd_boolean just_syms
;
3623 htab
= elf_hash_table (info
);
3624 bed
= get_elf_backend_data (abfd
);
3626 if ((abfd
->flags
& DYNAMIC
) == 0)
3632 /* You can't use -r against a dynamic object. Also, there's no
3633 hope of using a dynamic object which does not exactly match
3634 the format of the output file. */
3635 if (bfd_link_relocatable (info
)
3636 || !is_elf_hash_table (htab
)
3637 || info
->output_bfd
->xvec
!= abfd
->xvec
)
3639 if (bfd_link_relocatable (info
))
3640 bfd_set_error (bfd_error_invalid_operation
);
3642 bfd_set_error (bfd_error_wrong_format
);
3647 ehdr
= elf_elfheader (abfd
);
3648 if (info
->warn_alternate_em
3649 && bed
->elf_machine_code
!= ehdr
->e_machine
3650 && ((bed
->elf_machine_alt1
!= 0
3651 && ehdr
->e_machine
== bed
->elf_machine_alt1
)
3652 || (bed
->elf_machine_alt2
!= 0
3653 && ehdr
->e_machine
== bed
->elf_machine_alt2
)))
3654 info
->callbacks
->einfo
3655 (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"),
3656 ehdr
->e_machine
, abfd
, bed
->elf_machine_code
);
3658 /* As a GNU extension, any input sections which are named
3659 .gnu.warning.SYMBOL are treated as warning symbols for the given
3660 symbol. This differs from .gnu.warning sections, which generate
3661 warnings when they are included in an output file. */
3662 /* PR 12761: Also generate this warning when building shared libraries. */
3663 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3667 name
= bfd_get_section_name (abfd
, s
);
3668 if (CONST_STRNEQ (name
, ".gnu.warning."))
3673 name
+= sizeof ".gnu.warning." - 1;
3675 /* If this is a shared object, then look up the symbol
3676 in the hash table. If it is there, and it is already
3677 been defined, then we will not be using the entry
3678 from this shared object, so we don't need to warn.
3679 FIXME: If we see the definition in a regular object
3680 later on, we will warn, but we shouldn't. The only
3681 fix is to keep track of what warnings we are supposed
3682 to emit, and then handle them all at the end of the
3686 struct elf_link_hash_entry
*h
;
3688 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
3690 /* FIXME: What about bfd_link_hash_common? */
3692 && (h
->root
.type
== bfd_link_hash_defined
3693 || h
->root
.type
== bfd_link_hash_defweak
))
3698 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
3702 if (! bfd_get_section_contents (abfd
, s
, msg
, 0, sz
))
3707 if (! (_bfd_generic_link_add_one_symbol
3708 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
3709 FALSE
, bed
->collect
, NULL
)))
3712 if (bfd_link_executable (info
))
3714 /* Clobber the section size so that the warning does
3715 not get copied into the output file. */
3718 /* Also set SEC_EXCLUDE, so that symbols defined in
3719 the warning section don't get copied to the output. */
3720 s
->flags
|= SEC_EXCLUDE
;
3725 just_syms
= ((s
= abfd
->sections
) != NULL
3726 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
);
3731 /* If we are creating a shared library, create all the dynamic
3732 sections immediately. We need to attach them to something,
3733 so we attach them to this BFD, provided it is the right
3734 format and is not from ld --just-symbols. Always create the
3735 dynamic sections for -E/--dynamic-list. FIXME: If there
3736 are no input BFD's of the same format as the output, we can't
3737 make a shared library. */
3739 && (bfd_link_pic (info
)
3740 || (!bfd_link_relocatable (info
)
3741 && (info
->export_dynamic
|| info
->dynamic
)))
3742 && is_elf_hash_table (htab
)
3743 && info
->output_bfd
->xvec
== abfd
->xvec
3744 && !htab
->dynamic_sections_created
)
3746 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
3750 else if (!is_elf_hash_table (htab
))
3754 const char *soname
= NULL
;
3756 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
3759 /* ld --just-symbols and dynamic objects don't mix very well.
3760 ld shouldn't allow it. */
3764 /* If this dynamic lib was specified on the command line with
3765 --as-needed in effect, then we don't want to add a DT_NEEDED
3766 tag unless the lib is actually used. Similary for libs brought
3767 in by another lib's DT_NEEDED. When --no-add-needed is used
3768 on a dynamic lib, we don't want to add a DT_NEEDED entry for
3769 any dynamic library in DT_NEEDED tags in the dynamic lib at
3771 add_needed
= (elf_dyn_lib_class (abfd
)
3772 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
3773 | DYN_NO_NEEDED
)) == 0;
3775 s
= bfd_get_section_by_name (abfd
, ".dynamic");
3780 unsigned int elfsec
;
3781 unsigned long shlink
;
3783 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
3790 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
3791 if (elfsec
== SHN_BAD
)
3792 goto error_free_dyn
;
3793 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
3795 for (extdyn
= dynbuf
;
3796 extdyn
< dynbuf
+ s
->size
;
3797 extdyn
+= bed
->s
->sizeof_dyn
)
3799 Elf_Internal_Dyn dyn
;
3801 bed
->s
->swap_dyn_in (abfd
, extdyn
, &dyn
);
3802 if (dyn
.d_tag
== DT_SONAME
)
3804 unsigned int tagv
= dyn
.d_un
.d_val
;
3805 soname
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3807 goto error_free_dyn
;
3809 if (dyn
.d_tag
== DT_NEEDED
)
3811 struct bfd_link_needed_list
*n
, **pn
;
3813 unsigned int tagv
= dyn
.d_un
.d_val
;
3815 amt
= sizeof (struct bfd_link_needed_list
);
3816 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3817 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3818 if (n
== NULL
|| fnm
== NULL
)
3819 goto error_free_dyn
;
3820 amt
= strlen (fnm
) + 1;
3821 anm
= (char *) bfd_alloc (abfd
, amt
);
3823 goto error_free_dyn
;
3824 memcpy (anm
, fnm
, amt
);
3828 for (pn
= &htab
->needed
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3832 if (dyn
.d_tag
== DT_RUNPATH
)
3834 struct bfd_link_needed_list
*n
, **pn
;
3836 unsigned int tagv
= dyn
.d_un
.d_val
;
3838 amt
= sizeof (struct bfd_link_needed_list
);
3839 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3840 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3841 if (n
== NULL
|| fnm
== NULL
)
3842 goto error_free_dyn
;
3843 amt
= strlen (fnm
) + 1;
3844 anm
= (char *) bfd_alloc (abfd
, amt
);
3846 goto error_free_dyn
;
3847 memcpy (anm
, fnm
, amt
);
3851 for (pn
= & runpath
;
3857 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
3858 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
3860 struct bfd_link_needed_list
*n
, **pn
;
3862 unsigned int tagv
= dyn
.d_un
.d_val
;
3864 amt
= sizeof (struct bfd_link_needed_list
);
3865 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3866 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3867 if (n
== NULL
|| fnm
== NULL
)
3868 goto error_free_dyn
;
3869 amt
= strlen (fnm
) + 1;
3870 anm
= (char *) bfd_alloc (abfd
, amt
);
3872 goto error_free_dyn
;
3873 memcpy (anm
, fnm
, amt
);
3883 if (dyn
.d_tag
== DT_AUDIT
)
3885 unsigned int tagv
= dyn
.d_un
.d_val
;
3886 audit
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3893 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
3894 frees all more recently bfd_alloc'd blocks as well. */
3900 struct bfd_link_needed_list
**pn
;
3901 for (pn
= &htab
->runpath
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3906 /* We do not want to include any of the sections in a dynamic
3907 object in the output file. We hack by simply clobbering the
3908 list of sections in the BFD. This could be handled more
3909 cleanly by, say, a new section flag; the existing
3910 SEC_NEVER_LOAD flag is not the one we want, because that one
3911 still implies that the section takes up space in the output
3913 bfd_section_list_clear (abfd
);
3915 /* Find the name to use in a DT_NEEDED entry that refers to this
3916 object. If the object has a DT_SONAME entry, we use it.
3917 Otherwise, if the generic linker stuck something in
3918 elf_dt_name, we use that. Otherwise, we just use the file
3920 if (soname
== NULL
|| *soname
== '\0')
3922 soname
= elf_dt_name (abfd
);
3923 if (soname
== NULL
|| *soname
== '\0')
3924 soname
= bfd_get_filename (abfd
);
3927 /* Save the SONAME because sometimes the linker emulation code
3928 will need to know it. */
3929 elf_dt_name (abfd
) = soname
;
3931 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
3935 /* If we have already included this dynamic object in the
3936 link, just ignore it. There is no reason to include a
3937 particular dynamic object more than once. */
3941 /* Save the DT_AUDIT entry for the linker emulation code. */
3942 elf_dt_audit (abfd
) = audit
;
3945 /* If this is a dynamic object, we always link against the .dynsym
3946 symbol table, not the .symtab symbol table. The dynamic linker
3947 will only see the .dynsym symbol table, so there is no reason to
3948 look at .symtab for a dynamic object. */
3950 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
3951 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3953 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3955 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
3957 /* The sh_info field of the symtab header tells us where the
3958 external symbols start. We don't care about the local symbols at
3960 if (elf_bad_symtab (abfd
))
3962 extsymcount
= symcount
;
3967 extsymcount
= symcount
- hdr
->sh_info
;
3968 extsymoff
= hdr
->sh_info
;
3971 sym_hash
= elf_sym_hashes (abfd
);
3972 if (extsymcount
!= 0)
3974 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3976 if (isymbuf
== NULL
)
3979 if (sym_hash
== NULL
)
3981 /* We store a pointer to the hash table entry for each
3983 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
3984 sym_hash
= (struct elf_link_hash_entry
**) bfd_zalloc (abfd
, amt
);
3985 if (sym_hash
== NULL
)
3986 goto error_free_sym
;
3987 elf_sym_hashes (abfd
) = sym_hash
;
3993 /* Read in any version definitions. */
3994 if (!_bfd_elf_slurp_version_tables (abfd
,
3995 info
->default_imported_symver
))
3996 goto error_free_sym
;
3998 /* Read in the symbol versions, but don't bother to convert them
3999 to internal format. */
4000 if (elf_dynversym (abfd
) != 0)
4002 Elf_Internal_Shdr
*versymhdr
;
4004 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
4005 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
4006 if (extversym
== NULL
)
4007 goto error_free_sym
;
4008 amt
= versymhdr
->sh_size
;
4009 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
4010 || bfd_bread (extversym
, amt
, abfd
) != amt
)
4011 goto error_free_vers
;
4015 /* If we are loading an as-needed shared lib, save the symbol table
4016 state before we start adding symbols. If the lib turns out
4017 to be unneeded, restore the state. */
4018 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4023 for (entsize
= 0, i
= 0; i
< htab
->root
.table
.size
; i
++)
4025 struct bfd_hash_entry
*p
;
4026 struct elf_link_hash_entry
*h
;
4028 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4030 h
= (struct elf_link_hash_entry
*) p
;
4031 entsize
+= htab
->root
.table
.entsize
;
4032 if (h
->root
.type
== bfd_link_hash_warning
)
4033 entsize
+= htab
->root
.table
.entsize
;
4037 tabsize
= htab
->root
.table
.size
* sizeof (struct bfd_hash_entry
*);
4038 old_tab
= bfd_malloc (tabsize
+ entsize
);
4039 if (old_tab
== NULL
)
4040 goto error_free_vers
;
4042 /* Remember the current objalloc pointer, so that all mem for
4043 symbols added can later be reclaimed. */
4044 alloc_mark
= bfd_hash_allocate (&htab
->root
.table
, 1);
4045 if (alloc_mark
== NULL
)
4046 goto error_free_vers
;
4048 /* Make a special call to the linker "notice" function to
4049 tell it that we are about to handle an as-needed lib. */
4050 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_as_needed
))
4051 goto error_free_vers
;
4053 /* Clone the symbol table. Remember some pointers into the
4054 symbol table, and dynamic symbol count. */
4055 old_ent
= (char *) old_tab
+ tabsize
;
4056 memcpy (old_tab
, htab
->root
.table
.table
, tabsize
);
4057 old_undefs
= htab
->root
.undefs
;
4058 old_undefs_tail
= htab
->root
.undefs_tail
;
4059 old_table
= htab
->root
.table
.table
;
4060 old_size
= htab
->root
.table
.size
;
4061 old_count
= htab
->root
.table
.count
;
4062 old_strtab
= _bfd_elf_strtab_save (htab
->dynstr
);
4063 if (old_strtab
== NULL
)
4064 goto error_free_vers
;
4066 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4068 struct bfd_hash_entry
*p
;
4069 struct elf_link_hash_entry
*h
;
4071 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4073 memcpy (old_ent
, p
, htab
->root
.table
.entsize
);
4074 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4075 h
= (struct elf_link_hash_entry
*) p
;
4076 if (h
->root
.type
== bfd_link_hash_warning
)
4078 memcpy (old_ent
, h
->root
.u
.i
.link
, htab
->root
.table
.entsize
);
4079 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4086 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
4087 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
4089 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
4093 asection
*sec
, *new_sec
;
4096 struct elf_link_hash_entry
*h
;
4097 struct elf_link_hash_entry
*hi
;
4098 bfd_boolean definition
;
4099 bfd_boolean size_change_ok
;
4100 bfd_boolean type_change_ok
;
4101 bfd_boolean new_weakdef
;
4102 bfd_boolean new_weak
;
4103 bfd_boolean old_weak
;
4104 bfd_boolean override
;
4106 bfd_boolean discarded
;
4107 unsigned int old_alignment
;
4109 bfd_boolean matched
;
4113 flags
= BSF_NO_FLAGS
;
4115 value
= isym
->st_value
;
4116 common
= bed
->common_definition (isym
);
4119 bind
= ELF_ST_BIND (isym
->st_info
);
4123 /* This should be impossible, since ELF requires that all
4124 global symbols follow all local symbols, and that sh_info
4125 point to the first global symbol. Unfortunately, Irix 5
4130 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
4138 case STB_GNU_UNIQUE
:
4139 flags
= BSF_GNU_UNIQUE
;
4143 /* Leave it up to the processor backend. */
4147 if (isym
->st_shndx
== SHN_UNDEF
)
4148 sec
= bfd_und_section_ptr
;
4149 else if (isym
->st_shndx
== SHN_ABS
)
4150 sec
= bfd_abs_section_ptr
;
4151 else if (isym
->st_shndx
== SHN_COMMON
)
4153 sec
= bfd_com_section_ptr
;
4154 /* What ELF calls the size we call the value. What ELF
4155 calls the value we call the alignment. */
4156 value
= isym
->st_size
;
4160 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4162 sec
= bfd_abs_section_ptr
;
4163 else if (discarded_section (sec
))
4165 /* Symbols from discarded section are undefined. We keep
4167 sec
= bfd_und_section_ptr
;
4169 isym
->st_shndx
= SHN_UNDEF
;
4171 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
4175 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4178 goto error_free_vers
;
4180 if (isym
->st_shndx
== SHN_COMMON
4181 && (abfd
->flags
& BFD_PLUGIN
) != 0)
4183 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
4187 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
4189 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
4191 goto error_free_vers
;
4195 else if (isym
->st_shndx
== SHN_COMMON
4196 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4197 && !bfd_link_relocatable (info
))
4199 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
4203 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
4204 | SEC_LINKER_CREATED
);
4205 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
4207 goto error_free_vers
;
4211 else if (bed
->elf_add_symbol_hook
)
4213 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
4215 goto error_free_vers
;
4217 /* The hook function sets the name to NULL if this symbol
4218 should be skipped for some reason. */
4223 /* Sanity check that all possibilities were handled. */
4226 bfd_set_error (bfd_error_bad_value
);
4227 goto error_free_vers
;
4230 /* Silently discard TLS symbols from --just-syms. There's
4231 no way to combine a static TLS block with a new TLS block
4232 for this executable. */
4233 if (ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4234 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
4237 if (bfd_is_und_section (sec
)
4238 || bfd_is_com_section (sec
))
4243 size_change_ok
= FALSE
;
4244 type_change_ok
= bed
->type_change_ok
;
4251 if (is_elf_hash_table (htab
))
4253 Elf_Internal_Versym iver
;
4254 unsigned int vernum
= 0;
4259 if (info
->default_imported_symver
)
4260 /* Use the default symbol version created earlier. */
4261 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
4266 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
4268 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
4270 /* If this is a hidden symbol, or if it is not version
4271 1, we append the version name to the symbol name.
4272 However, we do not modify a non-hidden absolute symbol
4273 if it is not a function, because it might be the version
4274 symbol itself. FIXME: What if it isn't? */
4275 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
4277 && (!bfd_is_abs_section (sec
)
4278 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4281 size_t namelen
, verlen
, newlen
;
4284 if (isym
->st_shndx
!= SHN_UNDEF
)
4286 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4288 else if (vernum
> 1)
4290 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4296 (*_bfd_error_handler
)
4297 (_("%B: %s: invalid version %u (max %d)"),
4299 elf_tdata (abfd
)->cverdefs
);
4300 bfd_set_error (bfd_error_bad_value
);
4301 goto error_free_vers
;
4306 /* We cannot simply test for the number of
4307 entries in the VERNEED section since the
4308 numbers for the needed versions do not start
4310 Elf_Internal_Verneed
*t
;
4313 for (t
= elf_tdata (abfd
)->verref
;
4317 Elf_Internal_Vernaux
*a
;
4319 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4321 if (a
->vna_other
== vernum
)
4323 verstr
= a
->vna_nodename
;
4332 (*_bfd_error_handler
)
4333 (_("%B: %s: invalid needed version %d"),
4334 abfd
, name
, vernum
);
4335 bfd_set_error (bfd_error_bad_value
);
4336 goto error_free_vers
;
4340 namelen
= strlen (name
);
4341 verlen
= strlen (verstr
);
4342 newlen
= namelen
+ verlen
+ 2;
4343 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4344 && isym
->st_shndx
!= SHN_UNDEF
)
4347 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4348 if (newname
== NULL
)
4349 goto error_free_vers
;
4350 memcpy (newname
, name
, namelen
);
4351 p
= newname
+ namelen
;
4353 /* If this is a defined non-hidden version symbol,
4354 we add another @ to the name. This indicates the
4355 default version of the symbol. */
4356 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4357 && isym
->st_shndx
!= SHN_UNDEF
)
4359 memcpy (p
, verstr
, verlen
+ 1);
4364 /* If this symbol has default visibility and the user has
4365 requested we not re-export it, then mark it as hidden. */
4366 if (!bfd_is_und_section (sec
)
4369 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_INTERNAL
)
4370 isym
->st_other
= (STV_HIDDEN
4371 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
4373 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
4374 sym_hash
, &old_bfd
, &old_weak
,
4375 &old_alignment
, &skip
, &override
,
4376 &type_change_ok
, &size_change_ok
,
4378 goto error_free_vers
;
4383 /* Override a definition only if the new symbol matches the
4385 if (override
&& matched
)
4389 while (h
->root
.type
== bfd_link_hash_indirect
4390 || h
->root
.type
== bfd_link_hash_warning
)
4391 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4393 if (elf_tdata (abfd
)->verdef
!= NULL
4396 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4399 if (! (_bfd_generic_link_add_one_symbol
4400 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, bed
->collect
,
4401 (struct bfd_link_hash_entry
**) sym_hash
)))
4402 goto error_free_vers
;
4404 if ((flags
& BSF_GNU_UNIQUE
)
4405 && (abfd
->flags
& DYNAMIC
) == 0
4406 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
4407 elf_tdata (info
->output_bfd
)->has_gnu_symbols
|= elf_gnu_symbol_unique
;
4410 /* We need to make sure that indirect symbol dynamic flags are
4413 while (h
->root
.type
== bfd_link_hash_indirect
4414 || h
->root
.type
== bfd_link_hash_warning
)
4415 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4417 /* Setting the index to -3 tells elf_link_output_extsym that
4418 this symbol is defined in a discarded section. */
4424 new_weak
= (flags
& BSF_WEAK
) != 0;
4425 new_weakdef
= FALSE
;
4429 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4430 && is_elf_hash_table (htab
)
4431 && h
->u
.weakdef
== NULL
)
4433 /* Keep a list of all weak defined non function symbols from
4434 a dynamic object, using the weakdef field. Later in this
4435 function we will set the weakdef field to the correct
4436 value. We only put non-function symbols from dynamic
4437 objects on this list, because that happens to be the only
4438 time we need to know the normal symbol corresponding to a
4439 weak symbol, and the information is time consuming to
4440 figure out. If the weakdef field is not already NULL,
4441 then this symbol was already defined by some previous
4442 dynamic object, and we will be using that previous
4443 definition anyhow. */
4445 h
->u
.weakdef
= weaks
;
4450 /* Set the alignment of a common symbol. */
4451 if ((common
|| bfd_is_com_section (sec
))
4452 && h
->root
.type
== bfd_link_hash_common
)
4457 align
= bfd_log2 (isym
->st_value
);
4460 /* The new symbol is a common symbol in a shared object.
4461 We need to get the alignment from the section. */
4462 align
= new_sec
->alignment_power
;
4464 if (align
> old_alignment
)
4465 h
->root
.u
.c
.p
->alignment_power
= align
;
4467 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
4470 if (is_elf_hash_table (htab
))
4472 /* Set a flag in the hash table entry indicating the type of
4473 reference or definition we just found. A dynamic symbol
4474 is one which is referenced or defined by both a regular
4475 object and a shared object. */
4476 bfd_boolean dynsym
= FALSE
;
4478 /* Plugin symbols aren't normal. Don't set def_regular or
4479 ref_regular for them, or make them dynamic. */
4480 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4487 if (bind
!= STB_WEAK
)
4488 h
->ref_regular_nonweak
= 1;
4500 /* If the indirect symbol has been forced local, don't
4501 make the real symbol dynamic. */
4502 if ((h
== hi
|| !hi
->forced_local
)
4503 && (bfd_link_dll (info
)
4513 hi
->ref_dynamic
= 1;
4518 hi
->def_dynamic
= 1;
4521 /* If the indirect symbol has been forced local, don't
4522 make the real symbol dynamic. */
4523 if ((h
== hi
|| !hi
->forced_local
)
4526 || (h
->u
.weakdef
!= NULL
4528 && h
->u
.weakdef
->dynindx
!= -1)))
4532 /* Check to see if we need to add an indirect symbol for
4533 the default name. */
4535 || (!override
&& h
->root
.type
== bfd_link_hash_common
))
4536 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
4537 sec
, value
, &old_bfd
, &dynsym
))
4538 goto error_free_vers
;
4540 /* Check the alignment when a common symbol is involved. This
4541 can change when a common symbol is overridden by a normal
4542 definition or a common symbol is ignored due to the old
4543 normal definition. We need to make sure the maximum
4544 alignment is maintained. */
4545 if ((old_alignment
|| common
)
4546 && h
->root
.type
!= bfd_link_hash_common
)
4548 unsigned int common_align
;
4549 unsigned int normal_align
;
4550 unsigned int symbol_align
;
4554 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
4555 || h
->root
.type
== bfd_link_hash_defweak
);
4557 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
4558 if (h
->root
.u
.def
.section
->owner
!= NULL
4559 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
4561 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
4562 if (normal_align
> symbol_align
)
4563 normal_align
= symbol_align
;
4566 normal_align
= symbol_align
;
4570 common_align
= old_alignment
;
4571 common_bfd
= old_bfd
;
4576 common_align
= bfd_log2 (isym
->st_value
);
4578 normal_bfd
= old_bfd
;
4581 if (normal_align
< common_align
)
4583 /* PR binutils/2735 */
4584 if (normal_bfd
== NULL
)
4585 (*_bfd_error_handler
)
4586 (_("Warning: alignment %u of common symbol `%s' in %B is"
4587 " greater than the alignment (%u) of its section %A"),
4588 common_bfd
, h
->root
.u
.def
.section
,
4589 1 << common_align
, name
, 1 << normal_align
);
4591 (*_bfd_error_handler
)
4592 (_("Warning: alignment %u of symbol `%s' in %B"
4593 " is smaller than %u in %B"),
4594 normal_bfd
, common_bfd
,
4595 1 << normal_align
, name
, 1 << common_align
);
4599 /* Remember the symbol size if it isn't undefined. */
4600 if (isym
->st_size
!= 0
4601 && isym
->st_shndx
!= SHN_UNDEF
4602 && (definition
|| h
->size
== 0))
4605 && h
->size
!= isym
->st_size
4606 && ! size_change_ok
)
4607 (*_bfd_error_handler
)
4608 (_("Warning: size of symbol `%s' changed"
4609 " from %lu in %B to %lu in %B"),
4611 name
, (unsigned long) h
->size
,
4612 (unsigned long) isym
->st_size
);
4614 h
->size
= isym
->st_size
;
4617 /* If this is a common symbol, then we always want H->SIZE
4618 to be the size of the common symbol. The code just above
4619 won't fix the size if a common symbol becomes larger. We
4620 don't warn about a size change here, because that is
4621 covered by --warn-common. Allow changes between different
4623 if (h
->root
.type
== bfd_link_hash_common
)
4624 h
->size
= h
->root
.u
.c
.size
;
4626 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
4627 && ((definition
&& !new_weak
)
4628 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
4629 || h
->type
== STT_NOTYPE
))
4631 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
4633 /* Turn an IFUNC symbol from a DSO into a normal FUNC
4635 if (type
== STT_GNU_IFUNC
4636 && (abfd
->flags
& DYNAMIC
) != 0)
4639 if (h
->type
!= type
)
4641 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
4642 (*_bfd_error_handler
)
4643 (_("Warning: type of symbol `%s' changed"
4644 " from %d to %d in %B"),
4645 abfd
, name
, h
->type
, type
);
4651 /* Merge st_other field. */
4652 elf_merge_st_other (abfd
, h
, isym
, sec
, definition
, dynamic
);
4654 /* We don't want to make debug symbol dynamic. */
4656 && (sec
->flags
& SEC_DEBUGGING
)
4657 && !bfd_link_relocatable (info
))
4660 /* Nor should we make plugin symbols dynamic. */
4661 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4666 h
->target_internal
= isym
->st_target_internal
;
4667 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
4670 if (definition
&& !dynamic
)
4672 char *p
= strchr (name
, ELF_VER_CHR
);
4673 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
4675 /* Queue non-default versions so that .symver x, x@FOO
4676 aliases can be checked. */
4679 amt
= ((isymend
- isym
+ 1)
4680 * sizeof (struct elf_link_hash_entry
*));
4682 = (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4684 goto error_free_vers
;
4686 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
4690 if (dynsym
&& h
->dynindx
== -1)
4692 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4693 goto error_free_vers
;
4694 if (h
->u
.weakdef
!= NULL
4696 && h
->u
.weakdef
->dynindx
== -1)
4698 if (!bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
4699 goto error_free_vers
;
4702 else if (h
->dynindx
!= -1)
4703 /* If the symbol already has a dynamic index, but
4704 visibility says it should not be visible, turn it into
4706 switch (ELF_ST_VISIBILITY (h
->other
))
4710 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4715 /* Don't add DT_NEEDED for references from the dummy bfd nor
4716 for unmatched symbol. */
4721 && h
->ref_regular_nonweak
4723 || (old_bfd
->flags
& BFD_PLUGIN
) == 0))
4724 || (h
->ref_dynamic_nonweak
4725 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
4726 && !on_needed_list (elf_dt_name (abfd
),
4727 htab
->needed
, NULL
))))
4730 const char *soname
= elf_dt_name (abfd
);
4732 info
->callbacks
->minfo ("%!", soname
, old_bfd
,
4733 h
->root
.root
.string
);
4735 /* A symbol from a library loaded via DT_NEEDED of some
4736 other library is referenced by a regular object.
4737 Add a DT_NEEDED entry for it. Issue an error if
4738 --no-add-needed is used and the reference was not
4741 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
4743 (*_bfd_error_handler
)
4744 (_("%B: undefined reference to symbol '%s'"),
4746 bfd_set_error (bfd_error_missing_dso
);
4747 goto error_free_vers
;
4750 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
4751 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
4754 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
4756 goto error_free_vers
;
4758 BFD_ASSERT (ret
== 0);
4763 if (extversym
!= NULL
)
4769 if (isymbuf
!= NULL
)
4775 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4779 /* Restore the symbol table. */
4780 old_ent
= (char *) old_tab
+ tabsize
;
4781 memset (elf_sym_hashes (abfd
), 0,
4782 extsymcount
* sizeof (struct elf_link_hash_entry
*));
4783 htab
->root
.table
.table
= old_table
;
4784 htab
->root
.table
.size
= old_size
;
4785 htab
->root
.table
.count
= old_count
;
4786 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
4787 htab
->root
.undefs
= old_undefs
;
4788 htab
->root
.undefs_tail
= old_undefs_tail
;
4789 _bfd_elf_strtab_restore (htab
->dynstr
, old_strtab
);
4792 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4794 struct bfd_hash_entry
*p
;
4795 struct elf_link_hash_entry
*h
;
4797 unsigned int alignment_power
;
4799 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4801 h
= (struct elf_link_hash_entry
*) p
;
4802 if (h
->root
.type
== bfd_link_hash_warning
)
4803 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4805 /* Preserve the maximum alignment and size for common
4806 symbols even if this dynamic lib isn't on DT_NEEDED
4807 since it can still be loaded at run time by another
4809 if (h
->root
.type
== bfd_link_hash_common
)
4811 size
= h
->root
.u
.c
.size
;
4812 alignment_power
= h
->root
.u
.c
.p
->alignment_power
;
4817 alignment_power
= 0;
4819 memcpy (p
, old_ent
, htab
->root
.table
.entsize
);
4820 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4821 h
= (struct elf_link_hash_entry
*) p
;
4822 if (h
->root
.type
== bfd_link_hash_warning
)
4824 memcpy (h
->root
.u
.i
.link
, old_ent
, htab
->root
.table
.entsize
);
4825 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4826 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4828 if (h
->root
.type
== bfd_link_hash_common
)
4830 if (size
> h
->root
.u
.c
.size
)
4831 h
->root
.u
.c
.size
= size
;
4832 if (alignment_power
> h
->root
.u
.c
.p
->alignment_power
)
4833 h
->root
.u
.c
.p
->alignment_power
= alignment_power
;
4838 /* Make a special call to the linker "notice" function to
4839 tell it that symbols added for crefs may need to be removed. */
4840 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_not_needed
))
4841 goto error_free_vers
;
4844 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
4846 if (nondeflt_vers
!= NULL
)
4847 free (nondeflt_vers
);
4851 if (old_tab
!= NULL
)
4853 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_needed
))
4854 goto error_free_vers
;
4859 /* Now that all the symbols from this input file are created, if
4860 not performing a relocatable link, handle .symver foo, foo@BAR
4861 such that any relocs against foo become foo@BAR. */
4862 if (!bfd_link_relocatable (info
) && nondeflt_vers
!= NULL
)
4864 bfd_size_type cnt
, symidx
;
4866 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
4868 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
4869 char *shortname
, *p
;
4871 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
4873 || (h
->root
.type
!= bfd_link_hash_defined
4874 && h
->root
.type
!= bfd_link_hash_defweak
))
4877 amt
= p
- h
->root
.root
.string
;
4878 shortname
= (char *) bfd_malloc (amt
+ 1);
4880 goto error_free_vers
;
4881 memcpy (shortname
, h
->root
.root
.string
, amt
);
4882 shortname
[amt
] = '\0';
4884 hi
= (struct elf_link_hash_entry
*)
4885 bfd_link_hash_lookup (&htab
->root
, shortname
,
4886 FALSE
, FALSE
, FALSE
);
4888 && hi
->root
.type
== h
->root
.type
4889 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
4890 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
4892 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
4893 hi
->root
.type
= bfd_link_hash_indirect
;
4894 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
4895 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
4896 sym_hash
= elf_sym_hashes (abfd
);
4898 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
4899 if (sym_hash
[symidx
] == hi
)
4901 sym_hash
[symidx
] = h
;
4907 free (nondeflt_vers
);
4908 nondeflt_vers
= NULL
;
4911 /* Now set the weakdefs field correctly for all the weak defined
4912 symbols we found. The only way to do this is to search all the
4913 symbols. Since we only need the information for non functions in
4914 dynamic objects, that's the only time we actually put anything on
4915 the list WEAKS. We need this information so that if a regular
4916 object refers to a symbol defined weakly in a dynamic object, the
4917 real symbol in the dynamic object is also put in the dynamic
4918 symbols; we also must arrange for both symbols to point to the
4919 same memory location. We could handle the general case of symbol
4920 aliasing, but a general symbol alias can only be generated in
4921 assembler code, handling it correctly would be very time
4922 consuming, and other ELF linkers don't handle general aliasing
4926 struct elf_link_hash_entry
**hpp
;
4927 struct elf_link_hash_entry
**hppend
;
4928 struct elf_link_hash_entry
**sorted_sym_hash
;
4929 struct elf_link_hash_entry
*h
;
4932 /* Since we have to search the whole symbol list for each weak
4933 defined symbol, search time for N weak defined symbols will be
4934 O(N^2). Binary search will cut it down to O(NlogN). */
4935 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
4936 sorted_sym_hash
= (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4937 if (sorted_sym_hash
== NULL
)
4939 sym_hash
= sorted_sym_hash
;
4940 hpp
= elf_sym_hashes (abfd
);
4941 hppend
= hpp
+ extsymcount
;
4943 for (; hpp
< hppend
; hpp
++)
4947 && h
->root
.type
== bfd_link_hash_defined
4948 && !bed
->is_function_type (h
->type
))
4956 qsort (sorted_sym_hash
, sym_count
,
4957 sizeof (struct elf_link_hash_entry
*),
4960 while (weaks
!= NULL
)
4962 struct elf_link_hash_entry
*hlook
;
4965 size_t i
, j
, idx
= 0;
4968 weaks
= hlook
->u
.weakdef
;
4969 hlook
->u
.weakdef
= NULL
;
4971 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
4972 || hlook
->root
.type
== bfd_link_hash_defweak
4973 || hlook
->root
.type
== bfd_link_hash_common
4974 || hlook
->root
.type
== bfd_link_hash_indirect
);
4975 slook
= hlook
->root
.u
.def
.section
;
4976 vlook
= hlook
->root
.u
.def
.value
;
4982 bfd_signed_vma vdiff
;
4984 h
= sorted_sym_hash
[idx
];
4985 vdiff
= vlook
- h
->root
.u
.def
.value
;
4992 int sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
5002 /* We didn't find a value/section match. */
5006 /* With multiple aliases, or when the weak symbol is already
5007 strongly defined, we have multiple matching symbols and
5008 the binary search above may land on any of them. Step
5009 one past the matching symbol(s). */
5012 h
= sorted_sym_hash
[idx
];
5013 if (h
->root
.u
.def
.section
!= slook
5014 || h
->root
.u
.def
.value
!= vlook
)
5018 /* Now look back over the aliases. Since we sorted by size
5019 as well as value and section, we'll choose the one with
5020 the largest size. */
5023 h
= sorted_sym_hash
[idx
];
5025 /* Stop if value or section doesn't match. */
5026 if (h
->root
.u
.def
.section
!= slook
5027 || h
->root
.u
.def
.value
!= vlook
)
5029 else if (h
!= hlook
)
5031 hlook
->u
.weakdef
= h
;
5033 /* If the weak definition is in the list of dynamic
5034 symbols, make sure the real definition is put
5036 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
5038 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
5041 free (sorted_sym_hash
);
5046 /* If the real definition is in the list of dynamic
5047 symbols, make sure the weak definition is put
5048 there as well. If we don't do this, then the
5049 dynamic loader might not merge the entries for the
5050 real definition and the weak definition. */
5051 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
5053 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
5054 goto err_free_sym_hash
;
5061 free (sorted_sym_hash
);
5064 if (bed
->check_directives
5065 && !(*bed
->check_directives
) (abfd
, info
))
5068 if (!info
->check_relocs_after_open_input
5069 && !_bfd_elf_link_check_relocs (abfd
, info
))
5072 /* If this is a non-traditional link, try to optimize the handling
5073 of the .stab/.stabstr sections. */
5075 && ! info
->traditional_format
5076 && is_elf_hash_table (htab
)
5077 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
5081 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
5082 if (stabstr
!= NULL
)
5084 bfd_size_type string_offset
= 0;
5087 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
5088 if (CONST_STRNEQ (stab
->name
, ".stab")
5089 && (!stab
->name
[5] ||
5090 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
5091 && (stab
->flags
& SEC_MERGE
) == 0
5092 && !bfd_is_abs_section (stab
->output_section
))
5094 struct bfd_elf_section_data
*secdata
;
5096 secdata
= elf_section_data (stab
);
5097 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
5098 stabstr
, &secdata
->sec_info
,
5101 if (secdata
->sec_info
)
5102 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
5107 if (is_elf_hash_table (htab
) && add_needed
)
5109 /* Add this bfd to the loaded list. */
5110 struct elf_link_loaded_list
*n
;
5112 n
= (struct elf_link_loaded_list
*) bfd_alloc (abfd
, sizeof (*n
));
5116 n
->next
= htab
->loaded
;
5123 if (old_tab
!= NULL
)
5125 if (old_strtab
!= NULL
)
5127 if (nondeflt_vers
!= NULL
)
5128 free (nondeflt_vers
);
5129 if (extversym
!= NULL
)
5132 if (isymbuf
!= NULL
)
5138 /* Return the linker hash table entry of a symbol that might be
5139 satisfied by an archive symbol. Return -1 on error. */
5141 struct elf_link_hash_entry
*
5142 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
5143 struct bfd_link_info
*info
,
5146 struct elf_link_hash_entry
*h
;
5150 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
5154 /* If this is a default version (the name contains @@), look up the
5155 symbol again with only one `@' as well as without the version.
5156 The effect is that references to the symbol with and without the
5157 version will be matched by the default symbol in the archive. */
5159 p
= strchr (name
, ELF_VER_CHR
);
5160 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
5163 /* First check with only one `@'. */
5164 len
= strlen (name
);
5165 copy
= (char *) bfd_alloc (abfd
, len
);
5167 return (struct elf_link_hash_entry
*) 0 - 1;
5169 first
= p
- name
+ 1;
5170 memcpy (copy
, name
, first
);
5171 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
5173 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
5176 /* We also need to check references to the symbol without the
5178 copy
[first
- 1] = '\0';
5179 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
5180 FALSE
, FALSE
, TRUE
);
5183 bfd_release (abfd
, copy
);
5187 /* Add symbols from an ELF archive file to the linker hash table. We
5188 don't use _bfd_generic_link_add_archive_symbols because we need to
5189 handle versioned symbols.
5191 Fortunately, ELF archive handling is simpler than that done by
5192 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
5193 oddities. In ELF, if we find a symbol in the archive map, and the
5194 symbol is currently undefined, we know that we must pull in that
5197 Unfortunately, we do have to make multiple passes over the symbol
5198 table until nothing further is resolved. */
5201 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5204 unsigned char *included
= NULL
;
5208 const struct elf_backend_data
*bed
;
5209 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
5210 (bfd
*, struct bfd_link_info
*, const char *);
5212 if (! bfd_has_map (abfd
))
5214 /* An empty archive is a special case. */
5215 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
5217 bfd_set_error (bfd_error_no_armap
);
5221 /* Keep track of all symbols we know to be already defined, and all
5222 files we know to be already included. This is to speed up the
5223 second and subsequent passes. */
5224 c
= bfd_ardata (abfd
)->symdef_count
;
5228 amt
*= sizeof (*included
);
5229 included
= (unsigned char *) bfd_zmalloc (amt
);
5230 if (included
== NULL
)
5233 symdefs
= bfd_ardata (abfd
)->symdefs
;
5234 bed
= get_elf_backend_data (abfd
);
5235 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5248 symdefend
= symdef
+ c
;
5249 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5251 struct elf_link_hash_entry
*h
;
5253 struct bfd_link_hash_entry
*undefs_tail
;
5258 if (symdef
->file_offset
== last
)
5264 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5265 if (h
== (struct elf_link_hash_entry
*) 0 - 1)
5271 if (h
->root
.type
== bfd_link_hash_common
)
5273 /* We currently have a common symbol. The archive map contains
5274 a reference to this symbol, so we may want to include it. We
5275 only want to include it however, if this archive element
5276 contains a definition of the symbol, not just another common
5279 Unfortunately some archivers (including GNU ar) will put
5280 declarations of common symbols into their archive maps, as
5281 well as real definitions, so we cannot just go by the archive
5282 map alone. Instead we must read in the element's symbol
5283 table and check that to see what kind of symbol definition
5285 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5288 else if (h
->root
.type
!= bfd_link_hash_undefined
)
5290 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5291 /* Symbol must be defined. Don't check it again. */
5296 /* We need to include this archive member. */
5297 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5298 if (element
== NULL
)
5301 if (! bfd_check_format (element
, bfd_object
))
5304 undefs_tail
= info
->hash
->undefs_tail
;
5306 if (!(*info
->callbacks
5307 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5309 if (!bfd_link_add_symbols (element
, info
))
5312 /* If there are any new undefined symbols, we need to make
5313 another pass through the archive in order to see whether
5314 they can be defined. FIXME: This isn't perfect, because
5315 common symbols wind up on undefs_tail and because an
5316 undefined symbol which is defined later on in this pass
5317 does not require another pass. This isn't a bug, but it
5318 does make the code less efficient than it could be. */
5319 if (undefs_tail
!= info
->hash
->undefs_tail
)
5322 /* Look backward to mark all symbols from this object file
5323 which we have already seen in this pass. */
5327 included
[mark
] = TRUE
;
5332 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5334 /* We mark subsequent symbols from this object file as we go
5335 on through the loop. */
5336 last
= symdef
->file_offset
;
5346 if (included
!= NULL
)
5351 /* Given an ELF BFD, add symbols to the global hash table as
5355 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5357 switch (bfd_get_format (abfd
))
5360 return elf_link_add_object_symbols (abfd
, info
);
5362 return elf_link_add_archive_symbols (abfd
, info
);
5364 bfd_set_error (bfd_error_wrong_format
);
5369 struct hash_codes_info
5371 unsigned long *hashcodes
;
5375 /* This function will be called though elf_link_hash_traverse to store
5376 all hash value of the exported symbols in an array. */
5379 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5381 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5386 /* Ignore indirect symbols. These are added by the versioning code. */
5387 if (h
->dynindx
== -1)
5390 name
= h
->root
.root
.string
;
5391 if (h
->versioned
>= versioned
)
5393 char *p
= strchr (name
, ELF_VER_CHR
);
5396 alc
= (char *) bfd_malloc (p
- name
+ 1);
5402 memcpy (alc
, name
, p
- name
);
5403 alc
[p
- name
] = '\0';
5408 /* Compute the hash value. */
5409 ha
= bfd_elf_hash (name
);
5411 /* Store the found hash value in the array given as the argument. */
5412 *(inf
->hashcodes
)++ = ha
;
5414 /* And store it in the struct so that we can put it in the hash table
5416 h
->u
.elf_hash_value
= ha
;
5424 struct collect_gnu_hash_codes
5427 const struct elf_backend_data
*bed
;
5428 unsigned long int nsyms
;
5429 unsigned long int maskbits
;
5430 unsigned long int *hashcodes
;
5431 unsigned long int *hashval
;
5432 unsigned long int *indx
;
5433 unsigned long int *counts
;
5436 long int min_dynindx
;
5437 unsigned long int bucketcount
;
5438 unsigned long int symindx
;
5439 long int local_indx
;
5440 long int shift1
, shift2
;
5441 unsigned long int mask
;
5445 /* This function will be called though elf_link_hash_traverse to store
5446 all hash value of the exported symbols in an array. */
5449 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5451 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5456 /* Ignore indirect symbols. These are added by the versioning code. */
5457 if (h
->dynindx
== -1)
5460 /* Ignore also local symbols and undefined symbols. */
5461 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5464 name
= h
->root
.root
.string
;
5465 if (h
->versioned
>= versioned
)
5467 char *p
= strchr (name
, ELF_VER_CHR
);
5470 alc
= (char *) bfd_malloc (p
- name
+ 1);
5476 memcpy (alc
, name
, p
- name
);
5477 alc
[p
- name
] = '\0';
5482 /* Compute the hash value. */
5483 ha
= bfd_elf_gnu_hash (name
);
5485 /* Store the found hash value in the array for compute_bucket_count,
5486 and also for .dynsym reordering purposes. */
5487 s
->hashcodes
[s
->nsyms
] = ha
;
5488 s
->hashval
[h
->dynindx
] = ha
;
5490 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
5491 s
->min_dynindx
= h
->dynindx
;
5499 /* This function will be called though elf_link_hash_traverse to do
5500 final dynaminc symbol renumbering. */
5503 elf_renumber_gnu_hash_syms (struct elf_link_hash_entry
*h
, void *data
)
5505 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5506 unsigned long int bucket
;
5507 unsigned long int val
;
5509 /* Ignore indirect symbols. */
5510 if (h
->dynindx
== -1)
5513 /* Ignore also local symbols and undefined symbols. */
5514 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5516 if (h
->dynindx
>= s
->min_dynindx
)
5517 h
->dynindx
= s
->local_indx
++;
5521 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
5522 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
5523 & ((s
->maskbits
>> s
->shift1
) - 1);
5524 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
5526 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
5527 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
5528 if (s
->counts
[bucket
] == 1)
5529 /* Last element terminates the chain. */
5531 bfd_put_32 (s
->output_bfd
, val
,
5532 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
5533 --s
->counts
[bucket
];
5534 h
->dynindx
= s
->indx
[bucket
]++;
5538 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5541 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
5543 return !(h
->forced_local
5544 || h
->root
.type
== bfd_link_hash_undefined
5545 || h
->root
.type
== bfd_link_hash_undefweak
5546 || ((h
->root
.type
== bfd_link_hash_defined
5547 || h
->root
.type
== bfd_link_hash_defweak
)
5548 && h
->root
.u
.def
.section
->output_section
== NULL
));
5551 /* Array used to determine the number of hash table buckets to use
5552 based on the number of symbols there are. If there are fewer than
5553 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
5554 fewer than 37 we use 17 buckets, and so forth. We never use more
5555 than 32771 buckets. */
5557 static const size_t elf_buckets
[] =
5559 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
5563 /* Compute bucket count for hashing table. We do not use a static set
5564 of possible tables sizes anymore. Instead we determine for all
5565 possible reasonable sizes of the table the outcome (i.e., the
5566 number of collisions etc) and choose the best solution. The
5567 weighting functions are not too simple to allow the table to grow
5568 without bounds. Instead one of the weighting factors is the size.
5569 Therefore the result is always a good payoff between few collisions
5570 (= short chain lengths) and table size. */
5572 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5573 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
5574 unsigned long int nsyms
,
5577 size_t best_size
= 0;
5578 unsigned long int i
;
5580 /* We have a problem here. The following code to optimize the table
5581 size requires an integer type with more the 32 bits. If
5582 BFD_HOST_U_64_BIT is set we know about such a type. */
5583 #ifdef BFD_HOST_U_64_BIT
5588 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
5589 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
5590 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
5591 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
5592 unsigned long int *counts
;
5594 unsigned int no_improvement_count
= 0;
5596 /* Possible optimization parameters: if we have NSYMS symbols we say
5597 that the hashing table must at least have NSYMS/4 and at most
5599 minsize
= nsyms
/ 4;
5602 best_size
= maxsize
= nsyms
* 2;
5607 if ((best_size
& 31) == 0)
5611 /* Create array where we count the collisions in. We must use bfd_malloc
5612 since the size could be large. */
5614 amt
*= sizeof (unsigned long int);
5615 counts
= (unsigned long int *) bfd_malloc (amt
);
5619 /* Compute the "optimal" size for the hash table. The criteria is a
5620 minimal chain length. The minor criteria is (of course) the size
5622 for (i
= minsize
; i
< maxsize
; ++i
)
5624 /* Walk through the array of hashcodes and count the collisions. */
5625 BFD_HOST_U_64_BIT max
;
5626 unsigned long int j
;
5627 unsigned long int fact
;
5629 if (gnu_hash
&& (i
& 31) == 0)
5632 memset (counts
, '\0', i
* sizeof (unsigned long int));
5634 /* Determine how often each hash bucket is used. */
5635 for (j
= 0; j
< nsyms
; ++j
)
5636 ++counts
[hashcodes
[j
] % i
];
5638 /* For the weight function we need some information about the
5639 pagesize on the target. This is information need not be 100%
5640 accurate. Since this information is not available (so far) we
5641 define it here to a reasonable default value. If it is crucial
5642 to have a better value some day simply define this value. */
5643 # ifndef BFD_TARGET_PAGESIZE
5644 # define BFD_TARGET_PAGESIZE (4096)
5647 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
5649 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
5652 /* Variant 1: optimize for short chains. We add the squares
5653 of all the chain lengths (which favors many small chain
5654 over a few long chains). */
5655 for (j
= 0; j
< i
; ++j
)
5656 max
+= counts
[j
] * counts
[j
];
5658 /* This adds penalties for the overall size of the table. */
5659 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5662 /* Variant 2: Optimize a lot more for small table. Here we
5663 also add squares of the size but we also add penalties for
5664 empty slots (the +1 term). */
5665 for (j
= 0; j
< i
; ++j
)
5666 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
5668 /* The overall size of the table is considered, but not as
5669 strong as in variant 1, where it is squared. */
5670 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5674 /* Compare with current best results. */
5675 if (max
< best_chlen
)
5679 no_improvement_count
= 0;
5681 /* PR 11843: Avoid futile long searches for the best bucket size
5682 when there are a large number of symbols. */
5683 else if (++no_improvement_count
== 100)
5690 #endif /* defined (BFD_HOST_U_64_BIT) */
5692 /* This is the fallback solution if no 64bit type is available or if we
5693 are not supposed to spend much time on optimizations. We select the
5694 bucket count using a fixed set of numbers. */
5695 for (i
= 0; elf_buckets
[i
] != 0; i
++)
5697 best_size
= elf_buckets
[i
];
5698 if (nsyms
< elf_buckets
[i
+ 1])
5701 if (gnu_hash
&& best_size
< 2)
5708 /* Size any SHT_GROUP section for ld -r. */
5711 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
5715 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
5716 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
5717 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
5722 /* Set a default stack segment size. The value in INFO wins. If it
5723 is unset, LEGACY_SYMBOL's value is used, and if that symbol is
5724 undefined it is initialized. */
5727 bfd_elf_stack_segment_size (bfd
*output_bfd
,
5728 struct bfd_link_info
*info
,
5729 const char *legacy_symbol
,
5730 bfd_vma default_size
)
5732 struct elf_link_hash_entry
*h
= NULL
;
5734 /* Look for legacy symbol. */
5736 h
= elf_link_hash_lookup (elf_hash_table (info
), legacy_symbol
,
5737 FALSE
, FALSE
, FALSE
);
5738 if (h
&& (h
->root
.type
== bfd_link_hash_defined
5739 || h
->root
.type
== bfd_link_hash_defweak
)
5741 && (h
->type
== STT_NOTYPE
|| h
->type
== STT_OBJECT
))
5743 /* The symbol has no type if specified on the command line. */
5744 h
->type
= STT_OBJECT
;
5745 if (info
->stacksize
)
5746 (*_bfd_error_handler
) (_("%B: stack size specified and %s set"),
5747 output_bfd
, legacy_symbol
);
5748 else if (h
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
5749 (*_bfd_error_handler
) (_("%B: %s not absolute"),
5750 output_bfd
, legacy_symbol
);
5752 info
->stacksize
= h
->root
.u
.def
.value
;
5755 if (!info
->stacksize
)
5756 /* If the user didn't set a size, or explicitly inhibit the
5757 size, set it now. */
5758 info
->stacksize
= default_size
;
5760 /* Provide the legacy symbol, if it is referenced. */
5761 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
5762 || h
->root
.type
== bfd_link_hash_undefweak
))
5764 struct bfd_link_hash_entry
*bh
= NULL
;
5766 if (!(_bfd_generic_link_add_one_symbol
5767 (info
, output_bfd
, legacy_symbol
,
5768 BSF_GLOBAL
, bfd_abs_section_ptr
,
5769 info
->stacksize
>= 0 ? info
->stacksize
: 0,
5770 NULL
, FALSE
, get_elf_backend_data (output_bfd
)->collect
, &bh
)))
5773 h
= (struct elf_link_hash_entry
*) bh
;
5775 h
->type
= STT_OBJECT
;
5781 /* Set up the sizes and contents of the ELF dynamic sections. This is
5782 called by the ELF linker emulation before_allocation routine. We
5783 must set the sizes of the sections before the linker sets the
5784 addresses of the various sections. */
5787 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
5790 const char *filter_shlib
,
5792 const char *depaudit
,
5793 const char * const *auxiliary_filters
,
5794 struct bfd_link_info
*info
,
5795 asection
**sinterpptr
)
5797 bfd_size_type soname_indx
;
5799 const struct elf_backend_data
*bed
;
5800 struct elf_info_failed asvinfo
;
5804 soname_indx
= (bfd_size_type
) -1;
5806 if (!is_elf_hash_table (info
->hash
))
5809 bed
= get_elf_backend_data (output_bfd
);
5811 /* Any syms created from now on start with -1 in
5812 got.refcount/offset and plt.refcount/offset. */
5813 elf_hash_table (info
)->init_got_refcount
5814 = elf_hash_table (info
)->init_got_offset
;
5815 elf_hash_table (info
)->init_plt_refcount
5816 = elf_hash_table (info
)->init_plt_offset
;
5818 if (bfd_link_relocatable (info
)
5819 && !_bfd_elf_size_group_sections (info
))
5822 /* The backend may have to create some sections regardless of whether
5823 we're dynamic or not. */
5824 if (bed
->elf_backend_always_size_sections
5825 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
5828 /* Determine any GNU_STACK segment requirements, after the backend
5829 has had a chance to set a default segment size. */
5830 if (info
->execstack
)
5831 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| PF_X
;
5832 else if (info
->noexecstack
)
5833 elf_stack_flags (output_bfd
) = PF_R
| PF_W
;
5837 asection
*notesec
= NULL
;
5840 for (inputobj
= info
->input_bfds
;
5842 inputobj
= inputobj
->link
.next
)
5847 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
5849 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
5852 if (s
->flags
& SEC_CODE
)
5856 else if (bed
->default_execstack
)
5859 if (notesec
|| info
->stacksize
> 0)
5860 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| exec
;
5861 if (notesec
&& exec
&& bfd_link_relocatable (info
)
5862 && notesec
->output_section
!= bfd_abs_section_ptr
)
5863 notesec
->output_section
->flags
|= SEC_CODE
;
5866 dynobj
= elf_hash_table (info
)->dynobj
;
5868 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5870 struct elf_info_failed eif
;
5871 struct elf_link_hash_entry
*h
;
5873 struct bfd_elf_version_tree
*t
;
5874 struct bfd_elf_version_expr
*d
;
5876 bfd_boolean all_defined
;
5878 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
5879 BFD_ASSERT (*sinterpptr
!= NULL
|| !bfd_link_executable (info
) || info
->nointerp
);
5883 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5885 if (soname_indx
== (bfd_size_type
) -1
5886 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
5892 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
5894 info
->flags
|= DF_SYMBOLIC
;
5902 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
5904 if (indx
== (bfd_size_type
) -1)
5907 tag
= info
->new_dtags
? DT_RUNPATH
: DT_RPATH
;
5908 if (!_bfd_elf_add_dynamic_entry (info
, tag
, indx
))
5912 if (filter_shlib
!= NULL
)
5916 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5917 filter_shlib
, TRUE
);
5918 if (indx
== (bfd_size_type
) -1
5919 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
5923 if (auxiliary_filters
!= NULL
)
5925 const char * const *p
;
5927 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
5931 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5933 if (indx
== (bfd_size_type
) -1
5934 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
5943 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
5945 if (indx
== (bfd_size_type
) -1
5946 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
5950 if (depaudit
!= NULL
)
5954 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
5956 if (indx
== (bfd_size_type
) -1
5957 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
5964 /* If we are supposed to export all symbols into the dynamic symbol
5965 table (this is not the normal case), then do so. */
5966 if (info
->export_dynamic
5967 || (bfd_link_executable (info
) && info
->dynamic
))
5969 elf_link_hash_traverse (elf_hash_table (info
),
5970 _bfd_elf_export_symbol
,
5976 /* Make all global versions with definition. */
5977 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5978 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5979 if (!d
->symver
&& d
->literal
)
5981 const char *verstr
, *name
;
5982 size_t namelen
, verlen
, newlen
;
5983 char *newname
, *p
, leading_char
;
5984 struct elf_link_hash_entry
*newh
;
5986 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
5988 namelen
= strlen (name
) + (leading_char
!= '\0');
5990 verlen
= strlen (verstr
);
5991 newlen
= namelen
+ verlen
+ 3;
5993 newname
= (char *) bfd_malloc (newlen
);
5994 if (newname
== NULL
)
5996 newname
[0] = leading_char
;
5997 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
5999 /* Check the hidden versioned definition. */
6000 p
= newname
+ namelen
;
6002 memcpy (p
, verstr
, verlen
+ 1);
6003 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6004 newname
, FALSE
, FALSE
,
6007 || (newh
->root
.type
!= bfd_link_hash_defined
6008 && newh
->root
.type
!= bfd_link_hash_defweak
))
6010 /* Check the default versioned definition. */
6012 memcpy (p
, verstr
, verlen
+ 1);
6013 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6014 newname
, FALSE
, FALSE
,
6019 /* Mark this version if there is a definition and it is
6020 not defined in a shared object. */
6022 && !newh
->def_dynamic
6023 && (newh
->root
.type
== bfd_link_hash_defined
6024 || newh
->root
.type
== bfd_link_hash_defweak
))
6028 /* Attach all the symbols to their version information. */
6029 asvinfo
.info
= info
;
6030 asvinfo
.failed
= FALSE
;
6032 elf_link_hash_traverse (elf_hash_table (info
),
6033 _bfd_elf_link_assign_sym_version
,
6038 if (!info
->allow_undefined_version
)
6040 /* Check if all global versions have a definition. */
6042 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
6043 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
6044 if (d
->literal
&& !d
->symver
&& !d
->script
)
6046 (*_bfd_error_handler
)
6047 (_("%s: undefined version: %s"),
6048 d
->pattern
, t
->name
);
6049 all_defined
= FALSE
;
6054 bfd_set_error (bfd_error_bad_value
);
6059 /* Find all symbols which were defined in a dynamic object and make
6060 the backend pick a reasonable value for them. */
6061 elf_link_hash_traverse (elf_hash_table (info
),
6062 _bfd_elf_adjust_dynamic_symbol
,
6067 /* Add some entries to the .dynamic section. We fill in some of the
6068 values later, in bfd_elf_final_link, but we must add the entries
6069 now so that we know the final size of the .dynamic section. */
6071 /* If there are initialization and/or finalization functions to
6072 call then add the corresponding DT_INIT/DT_FINI entries. */
6073 h
= (info
->init_function
6074 ? elf_link_hash_lookup (elf_hash_table (info
),
6075 info
->init_function
, FALSE
,
6082 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
6085 h
= (info
->fini_function
6086 ? elf_link_hash_lookup (elf_hash_table (info
),
6087 info
->fini_function
, FALSE
,
6094 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
6098 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
6099 if (s
!= NULL
&& s
->linker_has_input
)
6101 /* DT_PREINIT_ARRAY is not allowed in shared library. */
6102 if (! bfd_link_executable (info
))
6107 for (sub
= info
->input_bfds
; sub
!= NULL
;
6108 sub
= sub
->link
.next
)
6109 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
)
6110 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
6111 if (elf_section_data (o
)->this_hdr
.sh_type
6112 == SHT_PREINIT_ARRAY
)
6114 (*_bfd_error_handler
)
6115 (_("%B: .preinit_array section is not allowed in DSO"),
6120 bfd_set_error (bfd_error_nonrepresentable_section
);
6124 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
6125 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
6128 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
6129 if (s
!= NULL
&& s
->linker_has_input
)
6131 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
6132 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
6135 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
6136 if (s
!= NULL
&& s
->linker_has_input
)
6138 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
6139 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
6143 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
6144 /* If .dynstr is excluded from the link, we don't want any of
6145 these tags. Strictly, we should be checking each section
6146 individually; This quick check covers for the case where
6147 someone does a /DISCARD/ : { *(*) }. */
6148 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
6150 bfd_size_type strsize
;
6152 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6153 if ((info
->emit_hash
6154 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
6155 || (info
->emit_gnu_hash
6156 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0))
6157 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
6158 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
6159 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
6160 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
6161 bed
->s
->sizeof_sym
))
6166 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
6169 /* The backend must work out the sizes of all the other dynamic
6172 && bed
->elf_backend_size_dynamic_sections
!= NULL
6173 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
6176 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6178 unsigned long section_sym_count
;
6179 struct bfd_elf_version_tree
*verdefs
;
6182 /* Set up the version definition section. */
6183 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
6184 BFD_ASSERT (s
!= NULL
);
6186 /* We may have created additional version definitions if we are
6187 just linking a regular application. */
6188 verdefs
= info
->version_info
;
6190 /* Skip anonymous version tag. */
6191 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
6192 verdefs
= verdefs
->next
;
6194 if (verdefs
== NULL
&& !info
->create_default_symver
)
6195 s
->flags
|= SEC_EXCLUDE
;
6200 struct bfd_elf_version_tree
*t
;
6202 Elf_Internal_Verdef def
;
6203 Elf_Internal_Verdaux defaux
;
6204 struct bfd_link_hash_entry
*bh
;
6205 struct elf_link_hash_entry
*h
;
6211 /* Make space for the base version. */
6212 size
+= sizeof (Elf_External_Verdef
);
6213 size
+= sizeof (Elf_External_Verdaux
);
6216 /* Make space for the default version. */
6217 if (info
->create_default_symver
)
6219 size
+= sizeof (Elf_External_Verdef
);
6223 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6225 struct bfd_elf_version_deps
*n
;
6227 /* Don't emit base version twice. */
6231 size
+= sizeof (Elf_External_Verdef
);
6232 size
+= sizeof (Elf_External_Verdaux
);
6235 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6236 size
+= sizeof (Elf_External_Verdaux
);
6240 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6241 if (s
->contents
== NULL
&& s
->size
!= 0)
6244 /* Fill in the version definition section. */
6248 def
.vd_version
= VER_DEF_CURRENT
;
6249 def
.vd_flags
= VER_FLG_BASE
;
6252 if (info
->create_default_symver
)
6254 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6255 def
.vd_next
= sizeof (Elf_External_Verdef
);
6259 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6260 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6261 + sizeof (Elf_External_Verdaux
));
6264 if (soname_indx
!= (bfd_size_type
) -1)
6266 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6268 def
.vd_hash
= bfd_elf_hash (soname
);
6269 defaux
.vda_name
= soname_indx
;
6276 name
= lbasename (output_bfd
->filename
);
6277 def
.vd_hash
= bfd_elf_hash (name
);
6278 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6280 if (indx
== (bfd_size_type
) -1)
6282 defaux
.vda_name
= indx
;
6284 defaux
.vda_next
= 0;
6286 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6287 (Elf_External_Verdef
*) p
);
6288 p
+= sizeof (Elf_External_Verdef
);
6289 if (info
->create_default_symver
)
6291 /* Add a symbol representing this version. */
6293 if (! (_bfd_generic_link_add_one_symbol
6294 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6296 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6298 h
= (struct elf_link_hash_entry
*) bh
;
6301 h
->type
= STT_OBJECT
;
6302 h
->verinfo
.vertree
= NULL
;
6304 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6307 /* Create a duplicate of the base version with the same
6308 aux block, but different flags. */
6311 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6313 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6314 + sizeof (Elf_External_Verdaux
));
6317 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6318 (Elf_External_Verdef
*) p
);
6319 p
+= sizeof (Elf_External_Verdef
);
6321 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6322 (Elf_External_Verdaux
*) p
);
6323 p
+= sizeof (Elf_External_Verdaux
);
6325 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6328 struct bfd_elf_version_deps
*n
;
6330 /* Don't emit the base version twice. */
6335 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6338 /* Add a symbol representing this version. */
6340 if (! (_bfd_generic_link_add_one_symbol
6341 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6343 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6345 h
= (struct elf_link_hash_entry
*) bh
;
6348 h
->type
= STT_OBJECT
;
6349 h
->verinfo
.vertree
= t
;
6351 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6354 def
.vd_version
= VER_DEF_CURRENT
;
6356 if (t
->globals
.list
== NULL
6357 && t
->locals
.list
== NULL
6359 def
.vd_flags
|= VER_FLG_WEAK
;
6360 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6361 def
.vd_cnt
= cdeps
+ 1;
6362 def
.vd_hash
= bfd_elf_hash (t
->name
);
6363 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6366 /* If a basever node is next, it *must* be the last node in
6367 the chain, otherwise Verdef construction breaks. */
6368 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6369 BFD_ASSERT (t
->next
->next
== NULL
);
6371 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6372 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6373 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6375 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6376 (Elf_External_Verdef
*) p
);
6377 p
+= sizeof (Elf_External_Verdef
);
6379 defaux
.vda_name
= h
->dynstr_index
;
6380 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6382 defaux
.vda_next
= 0;
6383 if (t
->deps
!= NULL
)
6384 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6385 t
->name_indx
= defaux
.vda_name
;
6387 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6388 (Elf_External_Verdaux
*) p
);
6389 p
+= sizeof (Elf_External_Verdaux
);
6391 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6393 if (n
->version_needed
== NULL
)
6395 /* This can happen if there was an error in the
6397 defaux
.vda_name
= 0;
6401 defaux
.vda_name
= n
->version_needed
->name_indx
;
6402 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6405 if (n
->next
== NULL
)
6406 defaux
.vda_next
= 0;
6408 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6410 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6411 (Elf_External_Verdaux
*) p
);
6412 p
+= sizeof (Elf_External_Verdaux
);
6416 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
6417 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
6420 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6423 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
6425 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
6428 else if (info
->flags
& DF_BIND_NOW
)
6430 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
6436 if (bfd_link_executable (info
))
6437 info
->flags_1
&= ~ (DF_1_INITFIRST
6440 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
6444 /* Work out the size of the version reference section. */
6446 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6447 BFD_ASSERT (s
!= NULL
);
6449 struct elf_find_verdep_info sinfo
;
6452 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6453 if (sinfo
.vers
== 0)
6455 sinfo
.failed
= FALSE
;
6457 elf_link_hash_traverse (elf_hash_table (info
),
6458 _bfd_elf_link_find_version_dependencies
,
6463 if (elf_tdata (output_bfd
)->verref
== NULL
)
6464 s
->flags
|= SEC_EXCLUDE
;
6467 Elf_Internal_Verneed
*t
;
6472 /* Build the version dependency section. */
6475 for (t
= elf_tdata (output_bfd
)->verref
;
6479 Elf_Internal_Vernaux
*a
;
6481 size
+= sizeof (Elf_External_Verneed
);
6483 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6484 size
+= sizeof (Elf_External_Vernaux
);
6488 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6489 if (s
->contents
== NULL
)
6493 for (t
= elf_tdata (output_bfd
)->verref
;
6498 Elf_Internal_Vernaux
*a
;
6502 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6505 t
->vn_version
= VER_NEED_CURRENT
;
6507 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6508 elf_dt_name (t
->vn_bfd
) != NULL
6509 ? elf_dt_name (t
->vn_bfd
)
6510 : lbasename (t
->vn_bfd
->filename
),
6512 if (indx
== (bfd_size_type
) -1)
6515 t
->vn_aux
= sizeof (Elf_External_Verneed
);
6516 if (t
->vn_nextref
== NULL
)
6519 t
->vn_next
= (sizeof (Elf_External_Verneed
)
6520 + caux
* sizeof (Elf_External_Vernaux
));
6522 _bfd_elf_swap_verneed_out (output_bfd
, t
,
6523 (Elf_External_Verneed
*) p
);
6524 p
+= sizeof (Elf_External_Verneed
);
6526 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6528 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6529 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6530 a
->vna_nodename
, FALSE
);
6531 if (indx
== (bfd_size_type
) -1)
6534 if (a
->vna_nextptr
== NULL
)
6537 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6539 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6540 (Elf_External_Vernaux
*) p
);
6541 p
+= sizeof (Elf_External_Vernaux
);
6545 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
6546 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
6549 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6553 if ((elf_tdata (output_bfd
)->cverrefs
== 0
6554 && elf_tdata (output_bfd
)->cverdefs
== 0)
6555 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6556 §ion_sym_count
) == 0)
6558 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6559 s
->flags
|= SEC_EXCLUDE
;
6565 /* Find the first non-excluded output section. We'll use its
6566 section symbol for some emitted relocs. */
6568 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
6572 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6573 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
6574 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6576 elf_hash_table (info
)->text_index_section
= s
;
6581 /* Find two non-excluded output sections, one for code, one for data.
6582 We'll use their section symbols for some emitted relocs. */
6584 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
6588 /* Data first, since setting text_index_section changes
6589 _bfd_elf_link_omit_section_dynsym. */
6590 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6591 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
)) == SEC_ALLOC
)
6592 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6594 elf_hash_table (info
)->data_index_section
= s
;
6598 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6599 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
))
6600 == (SEC_ALLOC
| SEC_READONLY
))
6601 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6603 elf_hash_table (info
)->text_index_section
= s
;
6607 if (elf_hash_table (info
)->text_index_section
== NULL
)
6608 elf_hash_table (info
)->text_index_section
6609 = elf_hash_table (info
)->data_index_section
;
6613 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
6615 const struct elf_backend_data
*bed
;
6617 if (!is_elf_hash_table (info
->hash
))
6620 bed
= get_elf_backend_data (output_bfd
);
6621 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
6623 if (elf_hash_table (info
)->dynamic_sections_created
)
6627 bfd_size_type dynsymcount
;
6628 unsigned long section_sym_count
;
6629 unsigned int dtagcount
;
6631 dynobj
= elf_hash_table (info
)->dynobj
;
6633 /* Assign dynsym indicies. In a shared library we generate a
6634 section symbol for each output section, which come first.
6635 Next come all of the back-end allocated local dynamic syms,
6636 followed by the rest of the global symbols. */
6638 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6639 §ion_sym_count
);
6641 /* Work out the size of the symbol version section. */
6642 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6643 BFD_ASSERT (s
!= NULL
);
6644 if ((s
->flags
& SEC_EXCLUDE
) == 0)
6646 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
6647 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6648 if (s
->contents
== NULL
)
6651 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
6655 /* Set the size of the .dynsym and .hash sections. We counted
6656 the number of dynamic symbols in elf_link_add_object_symbols.
6657 We will build the contents of .dynsym and .hash when we build
6658 the final symbol table, because until then we do not know the
6659 correct value to give the symbols. We built the .dynstr
6660 section as we went along in elf_link_add_object_symbols. */
6661 s
= elf_hash_table (info
)->dynsym
;
6662 BFD_ASSERT (s
!= NULL
);
6663 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
6665 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6666 if (s
->contents
== NULL
)
6669 /* The first entry in .dynsym is a dummy symbol. Clear all the
6670 section syms, in case we don't output them all. */
6671 ++section_sym_count
;
6672 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
6674 elf_hash_table (info
)->bucketcount
= 0;
6676 /* Compute the size of the hashing table. As a side effect this
6677 computes the hash values for all the names we export. */
6678 if (info
->emit_hash
)
6680 unsigned long int *hashcodes
;
6681 struct hash_codes_info hashinf
;
6683 unsigned long int nsyms
;
6685 size_t hash_entry_size
;
6687 /* Compute the hash values for all exported symbols. At the same
6688 time store the values in an array so that we could use them for
6690 amt
= dynsymcount
* sizeof (unsigned long int);
6691 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
6692 if (hashcodes
== NULL
)
6694 hashinf
.hashcodes
= hashcodes
;
6695 hashinf
.error
= FALSE
;
6697 /* Put all hash values in HASHCODES. */
6698 elf_link_hash_traverse (elf_hash_table (info
),
6699 elf_collect_hash_codes
, &hashinf
);
6706 nsyms
= hashinf
.hashcodes
- hashcodes
;
6708 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
6711 if (bucketcount
== 0)
6714 elf_hash_table (info
)->bucketcount
= bucketcount
;
6716 s
= bfd_get_linker_section (dynobj
, ".hash");
6717 BFD_ASSERT (s
!= NULL
);
6718 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
6719 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
6720 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6721 if (s
->contents
== NULL
)
6724 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
6725 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
6726 s
->contents
+ hash_entry_size
);
6729 if (info
->emit_gnu_hash
)
6732 unsigned char *contents
;
6733 struct collect_gnu_hash_codes cinfo
;
6737 memset (&cinfo
, 0, sizeof (cinfo
));
6739 /* Compute the hash values for all exported symbols. At the same
6740 time store the values in an array so that we could use them for
6742 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
6743 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
6744 if (cinfo
.hashcodes
== NULL
)
6747 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
6748 cinfo
.min_dynindx
= -1;
6749 cinfo
.output_bfd
= output_bfd
;
6752 /* Put all hash values in HASHCODES. */
6753 elf_link_hash_traverse (elf_hash_table (info
),
6754 elf_collect_gnu_hash_codes
, &cinfo
);
6757 free (cinfo
.hashcodes
);
6762 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
6764 if (bucketcount
== 0)
6766 free (cinfo
.hashcodes
);
6770 s
= bfd_get_linker_section (dynobj
, ".gnu.hash");
6771 BFD_ASSERT (s
!= NULL
);
6773 if (cinfo
.nsyms
== 0)
6775 /* Empty .gnu.hash section is special. */
6776 BFD_ASSERT (cinfo
.min_dynindx
== -1);
6777 free (cinfo
.hashcodes
);
6778 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
6779 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6780 if (contents
== NULL
)
6782 s
->contents
= contents
;
6783 /* 1 empty bucket. */
6784 bfd_put_32 (output_bfd
, 1, contents
);
6785 /* SYMIDX above the special symbol 0. */
6786 bfd_put_32 (output_bfd
, 1, contents
+ 4);
6787 /* Just one word for bitmask. */
6788 bfd_put_32 (output_bfd
, 1, contents
+ 8);
6789 /* Only hash fn bloom filter. */
6790 bfd_put_32 (output_bfd
, 0, contents
+ 12);
6791 /* No hashes are valid - empty bitmask. */
6792 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
6793 /* No hashes in the only bucket. */
6794 bfd_put_32 (output_bfd
, 0,
6795 contents
+ 16 + bed
->s
->arch_size
/ 8);
6799 unsigned long int maskwords
, maskbitslog2
, x
;
6800 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
6804 while ((x
>>= 1) != 0)
6806 if (maskbitslog2
< 3)
6808 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
6809 maskbitslog2
= maskbitslog2
+ 3;
6811 maskbitslog2
= maskbitslog2
+ 2;
6812 if (bed
->s
->arch_size
== 64)
6814 if (maskbitslog2
== 5)
6820 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
6821 cinfo
.shift2
= maskbitslog2
;
6822 cinfo
.maskbits
= 1 << maskbitslog2
;
6823 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
6824 amt
= bucketcount
* sizeof (unsigned long int) * 2;
6825 amt
+= maskwords
* sizeof (bfd_vma
);
6826 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
6827 if (cinfo
.bitmask
== NULL
)
6829 free (cinfo
.hashcodes
);
6833 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
6834 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
6835 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
6836 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
6838 /* Determine how often each hash bucket is used. */
6839 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
6840 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
6841 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
6843 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
6844 if (cinfo
.counts
[i
] != 0)
6846 cinfo
.indx
[i
] = cnt
;
6847 cnt
+= cinfo
.counts
[i
];
6849 BFD_ASSERT (cnt
== dynsymcount
);
6850 cinfo
.bucketcount
= bucketcount
;
6851 cinfo
.local_indx
= cinfo
.min_dynindx
;
6853 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
6854 s
->size
+= cinfo
.maskbits
/ 8;
6855 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6856 if (contents
== NULL
)
6858 free (cinfo
.bitmask
);
6859 free (cinfo
.hashcodes
);
6863 s
->contents
= contents
;
6864 bfd_put_32 (output_bfd
, bucketcount
, contents
);
6865 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
6866 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
6867 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
6868 contents
+= 16 + cinfo
.maskbits
/ 8;
6870 for (i
= 0; i
< bucketcount
; ++i
)
6872 if (cinfo
.counts
[i
] == 0)
6873 bfd_put_32 (output_bfd
, 0, contents
);
6875 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
6879 cinfo
.contents
= contents
;
6881 /* Renumber dynamic symbols, populate .gnu.hash section. */
6882 elf_link_hash_traverse (elf_hash_table (info
),
6883 elf_renumber_gnu_hash_syms
, &cinfo
);
6885 contents
= s
->contents
+ 16;
6886 for (i
= 0; i
< maskwords
; ++i
)
6888 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
6890 contents
+= bed
->s
->arch_size
/ 8;
6893 free (cinfo
.bitmask
);
6894 free (cinfo
.hashcodes
);
6898 s
= bfd_get_linker_section (dynobj
, ".dynstr");
6899 BFD_ASSERT (s
!= NULL
);
6901 elf_finalize_dynstr (output_bfd
, info
);
6903 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6905 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
6906 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
6913 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
6916 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
6919 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
6920 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
6923 /* Finish SHF_MERGE section merging. */
6926 _bfd_elf_merge_sections (bfd
*obfd
, struct bfd_link_info
*info
)
6931 if (!is_elf_hash_table (info
->hash
))
6934 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
6935 if ((ibfd
->flags
& DYNAMIC
) == 0
6936 && bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
6937 && (elf_elfheader (ibfd
)->e_ident
[EI_CLASS
]
6938 == get_elf_backend_data (obfd
)->s
->elfclass
))
6939 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6940 if ((sec
->flags
& SEC_MERGE
) != 0
6941 && !bfd_is_abs_section (sec
->output_section
))
6943 struct bfd_elf_section_data
*secdata
;
6945 secdata
= elf_section_data (sec
);
6946 if (! _bfd_add_merge_section (obfd
,
6947 &elf_hash_table (info
)->merge_info
,
6948 sec
, &secdata
->sec_info
))
6950 else if (secdata
->sec_info
)
6951 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
6954 if (elf_hash_table (info
)->merge_info
!= NULL
)
6955 _bfd_merge_sections (obfd
, info
, elf_hash_table (info
)->merge_info
,
6956 merge_sections_remove_hook
);
6960 /* Create an entry in an ELF linker hash table. */
6962 struct bfd_hash_entry
*
6963 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
6964 struct bfd_hash_table
*table
,
6967 /* Allocate the structure if it has not already been allocated by a
6971 entry
= (struct bfd_hash_entry
*)
6972 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
6977 /* Call the allocation method of the superclass. */
6978 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
6981 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
6982 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
6984 /* Set local fields. */
6987 ret
->got
= htab
->init_got_refcount
;
6988 ret
->plt
= htab
->init_plt_refcount
;
6989 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
6990 - offsetof (struct elf_link_hash_entry
, size
)));
6991 /* Assume that we have been called by a non-ELF symbol reader.
6992 This flag is then reset by the code which reads an ELF input
6993 file. This ensures that a symbol created by a non-ELF symbol
6994 reader will have the flag set correctly. */
7001 /* Copy data from an indirect symbol to its direct symbol, hiding the
7002 old indirect symbol. Also used for copying flags to a weakdef. */
7005 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
7006 struct elf_link_hash_entry
*dir
,
7007 struct elf_link_hash_entry
*ind
)
7009 struct elf_link_hash_table
*htab
;
7011 /* Copy down any references that we may have already seen to the
7012 symbol which just became indirect if DIR isn't a hidden versioned
7015 if (dir
->versioned
!= versioned_hidden
)
7017 dir
->ref_dynamic
|= ind
->ref_dynamic
;
7018 dir
->ref_regular
|= ind
->ref_regular
;
7019 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
7020 dir
->non_got_ref
|= ind
->non_got_ref
;
7021 dir
->needs_plt
|= ind
->needs_plt
;
7022 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
7025 if (ind
->root
.type
!= bfd_link_hash_indirect
)
7028 /* Copy over the global and procedure linkage table refcount entries.
7029 These may have been already set up by a check_relocs routine. */
7030 htab
= elf_hash_table (info
);
7031 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
7033 if (dir
->got
.refcount
< 0)
7034 dir
->got
.refcount
= 0;
7035 dir
->got
.refcount
+= ind
->got
.refcount
;
7036 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
7039 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
7041 if (dir
->plt
.refcount
< 0)
7042 dir
->plt
.refcount
= 0;
7043 dir
->plt
.refcount
+= ind
->plt
.refcount
;
7044 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
7047 if (ind
->dynindx
!= -1)
7049 if (dir
->dynindx
!= -1)
7050 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
7051 dir
->dynindx
= ind
->dynindx
;
7052 dir
->dynstr_index
= ind
->dynstr_index
;
7054 ind
->dynstr_index
= 0;
7059 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
7060 struct elf_link_hash_entry
*h
,
7061 bfd_boolean force_local
)
7063 /* STT_GNU_IFUNC symbol must go through PLT. */
7064 if (h
->type
!= STT_GNU_IFUNC
)
7066 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
7071 h
->forced_local
= 1;
7072 if (h
->dynindx
!= -1)
7075 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
7081 /* Initialize an ELF linker hash table. *TABLE has been zeroed by our
7085 _bfd_elf_link_hash_table_init
7086 (struct elf_link_hash_table
*table
,
7088 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
7089 struct bfd_hash_table
*,
7091 unsigned int entsize
,
7092 enum elf_target_id target_id
)
7095 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
7097 table
->init_got_refcount
.refcount
= can_refcount
- 1;
7098 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
7099 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
7100 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
7101 /* The first dynamic symbol is a dummy. */
7102 table
->dynsymcount
= 1;
7104 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
7106 table
->root
.type
= bfd_link_elf_hash_table
;
7107 table
->hash_table_id
= target_id
;
7112 /* Create an ELF linker hash table. */
7114 struct bfd_link_hash_table
*
7115 _bfd_elf_link_hash_table_create (bfd
*abfd
)
7117 struct elf_link_hash_table
*ret
;
7118 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
7120 ret
= (struct elf_link_hash_table
*) bfd_zmalloc (amt
);
7124 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
7125 sizeof (struct elf_link_hash_entry
),
7131 ret
->root
.hash_table_free
= _bfd_elf_link_hash_table_free
;
7136 /* Destroy an ELF linker hash table. */
7139 _bfd_elf_link_hash_table_free (bfd
*obfd
)
7141 struct elf_link_hash_table
*htab
;
7143 htab
= (struct elf_link_hash_table
*) obfd
->link
.hash
;
7144 if (htab
->dynstr
!= NULL
)
7145 _bfd_elf_strtab_free (htab
->dynstr
);
7146 _bfd_merge_sections_free (htab
->merge_info
);
7147 _bfd_generic_link_hash_table_free (obfd
);
7150 /* This is a hook for the ELF emulation code in the generic linker to
7151 tell the backend linker what file name to use for the DT_NEEDED
7152 entry for a dynamic object. */
7155 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
7157 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7158 && bfd_get_format (abfd
) == bfd_object
)
7159 elf_dt_name (abfd
) = name
;
7163 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
7166 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7167 && bfd_get_format (abfd
) == bfd_object
)
7168 lib_class
= elf_dyn_lib_class (abfd
);
7175 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
7177 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7178 && bfd_get_format (abfd
) == bfd_object
)
7179 elf_dyn_lib_class (abfd
) = lib_class
;
7182 /* Get the list of DT_NEEDED entries for a link. This is a hook for
7183 the linker ELF emulation code. */
7185 struct bfd_link_needed_list
*
7186 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7187 struct bfd_link_info
*info
)
7189 if (! is_elf_hash_table (info
->hash
))
7191 return elf_hash_table (info
)->needed
;
7194 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
7195 hook for the linker ELF emulation code. */
7197 struct bfd_link_needed_list
*
7198 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7199 struct bfd_link_info
*info
)
7201 if (! is_elf_hash_table (info
->hash
))
7203 return elf_hash_table (info
)->runpath
;
7206 /* Get the name actually used for a dynamic object for a link. This
7207 is the SONAME entry if there is one. Otherwise, it is the string
7208 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
7211 bfd_elf_get_dt_soname (bfd
*abfd
)
7213 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7214 && bfd_get_format (abfd
) == bfd_object
)
7215 return elf_dt_name (abfd
);
7219 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
7220 the ELF linker emulation code. */
7223 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
7224 struct bfd_link_needed_list
**pneeded
)
7227 bfd_byte
*dynbuf
= NULL
;
7228 unsigned int elfsec
;
7229 unsigned long shlink
;
7230 bfd_byte
*extdyn
, *extdynend
;
7232 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
7236 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
7237 || bfd_get_format (abfd
) != bfd_object
)
7240 s
= bfd_get_section_by_name (abfd
, ".dynamic");
7241 if (s
== NULL
|| s
->size
== 0)
7244 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
7247 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
7248 if (elfsec
== SHN_BAD
)
7251 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
7253 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
7254 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
7257 extdynend
= extdyn
+ s
->size
;
7258 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
7260 Elf_Internal_Dyn dyn
;
7262 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
7264 if (dyn
.d_tag
== DT_NULL
)
7267 if (dyn
.d_tag
== DT_NEEDED
)
7270 struct bfd_link_needed_list
*l
;
7271 unsigned int tagv
= dyn
.d_un
.d_val
;
7274 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
7279 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
7300 struct elf_symbuf_symbol
7302 unsigned long st_name
; /* Symbol name, index in string tbl */
7303 unsigned char st_info
; /* Type and binding attributes */
7304 unsigned char st_other
; /* Visibilty, and target specific */
7307 struct elf_symbuf_head
7309 struct elf_symbuf_symbol
*ssym
;
7310 bfd_size_type count
;
7311 unsigned int st_shndx
;
7318 Elf_Internal_Sym
*isym
;
7319 struct elf_symbuf_symbol
*ssym
;
7324 /* Sort references to symbols by ascending section number. */
7327 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7329 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
7330 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
7332 return s1
->st_shndx
- s2
->st_shndx
;
7336 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7338 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7339 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7340 return strcmp (s1
->name
, s2
->name
);
7343 static struct elf_symbuf_head
*
7344 elf_create_symbuf (bfd_size_type symcount
, Elf_Internal_Sym
*isymbuf
)
7346 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
7347 struct elf_symbuf_symbol
*ssym
;
7348 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
7349 bfd_size_type i
, shndx_count
, total_size
;
7351 indbuf
= (Elf_Internal_Sym
**) bfd_malloc2 (symcount
, sizeof (*indbuf
));
7355 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
7356 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
)
7357 *ind
++ = &isymbuf
[i
];
7360 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
7361 elf_sort_elf_symbol
);
7364 if (indbufend
> indbuf
)
7365 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
7366 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
7369 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
7370 + (indbufend
- indbuf
) * sizeof (*ssym
));
7371 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
7372 if (ssymbuf
== NULL
)
7378 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
7379 ssymbuf
->ssym
= NULL
;
7380 ssymbuf
->count
= shndx_count
;
7381 ssymbuf
->st_shndx
= 0;
7382 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
7384 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
7387 ssymhead
->ssym
= ssym
;
7388 ssymhead
->count
= 0;
7389 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
7391 ssym
->st_name
= (*ind
)->st_name
;
7392 ssym
->st_info
= (*ind
)->st_info
;
7393 ssym
->st_other
= (*ind
)->st_other
;
7396 BFD_ASSERT ((bfd_size_type
) (ssymhead
- ssymbuf
) == shndx_count
7397 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
7404 /* Check if 2 sections define the same set of local and global
7408 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
7409 struct bfd_link_info
*info
)
7412 const struct elf_backend_data
*bed1
, *bed2
;
7413 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7414 bfd_size_type symcount1
, symcount2
;
7415 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7416 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
7417 Elf_Internal_Sym
*isym
, *isymend
;
7418 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
7419 bfd_size_type count1
, count2
, i
;
7420 unsigned int shndx1
, shndx2
;
7426 /* Both sections have to be in ELF. */
7427 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7428 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7431 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7434 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7435 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7436 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
7439 bed1
= get_elf_backend_data (bfd1
);
7440 bed2
= get_elf_backend_data (bfd2
);
7441 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7442 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7443 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7444 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7446 if (symcount1
== 0 || symcount2
== 0)
7452 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
7453 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
7455 if (ssymbuf1
== NULL
)
7457 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7459 if (isymbuf1
== NULL
)
7462 if (!info
->reduce_memory_overheads
)
7463 elf_tdata (bfd1
)->symbuf
= ssymbuf1
7464 = elf_create_symbuf (symcount1
, isymbuf1
);
7467 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
7469 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7471 if (isymbuf2
== NULL
)
7474 if (ssymbuf1
!= NULL
&& !info
->reduce_memory_overheads
)
7475 elf_tdata (bfd2
)->symbuf
= ssymbuf2
7476 = elf_create_symbuf (symcount2
, isymbuf2
);
7479 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
7481 /* Optimized faster version. */
7482 bfd_size_type lo
, hi
, mid
;
7483 struct elf_symbol
*symp
;
7484 struct elf_symbuf_symbol
*ssym
, *ssymend
;
7487 hi
= ssymbuf1
->count
;
7492 mid
= (lo
+ hi
) / 2;
7493 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
7495 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
7499 count1
= ssymbuf1
[mid
].count
;
7506 hi
= ssymbuf2
->count
;
7511 mid
= (lo
+ hi
) / 2;
7512 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
7514 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
7518 count2
= ssymbuf2
[mid
].count
;
7524 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7528 = (struct elf_symbol
*) bfd_malloc (count1
* sizeof (*symtable1
));
7530 = (struct elf_symbol
*) bfd_malloc (count2
* sizeof (*symtable2
));
7531 if (symtable1
== NULL
|| symtable2
== NULL
)
7535 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
7536 ssym
< ssymend
; ssym
++, symp
++)
7538 symp
->u
.ssym
= ssym
;
7539 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
7545 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
7546 ssym
< ssymend
; ssym
++, symp
++)
7548 symp
->u
.ssym
= ssym
;
7549 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
7554 /* Sort symbol by name. */
7555 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7556 elf_sym_name_compare
);
7557 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7558 elf_sym_name_compare
);
7560 for (i
= 0; i
< count1
; i
++)
7561 /* Two symbols must have the same binding, type and name. */
7562 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
7563 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
7564 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7571 symtable1
= (struct elf_symbol
*)
7572 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
7573 symtable2
= (struct elf_symbol
*)
7574 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
7575 if (symtable1
== NULL
|| symtable2
== NULL
)
7578 /* Count definitions in the section. */
7580 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
7581 if (isym
->st_shndx
== shndx1
)
7582 symtable1
[count1
++].u
.isym
= isym
;
7585 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
7586 if (isym
->st_shndx
== shndx2
)
7587 symtable2
[count2
++].u
.isym
= isym
;
7589 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7592 for (i
= 0; i
< count1
; i
++)
7594 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
7595 symtable1
[i
].u
.isym
->st_name
);
7597 for (i
= 0; i
< count2
; i
++)
7599 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
7600 symtable2
[i
].u
.isym
->st_name
);
7602 /* Sort symbol by name. */
7603 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7604 elf_sym_name_compare
);
7605 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7606 elf_sym_name_compare
);
7608 for (i
= 0; i
< count1
; i
++)
7609 /* Two symbols must have the same binding, type and name. */
7610 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
7611 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
7612 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7630 /* Return TRUE if 2 section types are compatible. */
7633 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
7634 bfd
*bbfd
, const asection
*bsec
)
7638 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
7639 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7642 return elf_section_type (asec
) == elf_section_type (bsec
);
7645 /* Final phase of ELF linker. */
7647 /* A structure we use to avoid passing large numbers of arguments. */
7649 struct elf_final_link_info
7651 /* General link information. */
7652 struct bfd_link_info
*info
;
7655 /* Symbol string table. */
7656 struct elf_strtab_hash
*symstrtab
;
7657 /* .hash section. */
7659 /* symbol version section (.gnu.version). */
7660 asection
*symver_sec
;
7661 /* Buffer large enough to hold contents of any section. */
7663 /* Buffer large enough to hold external relocs of any section. */
7664 void *external_relocs
;
7665 /* Buffer large enough to hold internal relocs of any section. */
7666 Elf_Internal_Rela
*internal_relocs
;
7667 /* Buffer large enough to hold external local symbols of any input
7669 bfd_byte
*external_syms
;
7670 /* And a buffer for symbol section indices. */
7671 Elf_External_Sym_Shndx
*locsym_shndx
;
7672 /* Buffer large enough to hold internal local symbols of any input
7674 Elf_Internal_Sym
*internal_syms
;
7675 /* Array large enough to hold a symbol index for each local symbol
7676 of any input BFD. */
7678 /* Array large enough to hold a section pointer for each local
7679 symbol of any input BFD. */
7680 asection
**sections
;
7681 /* Buffer for SHT_SYMTAB_SHNDX section. */
7682 Elf_External_Sym_Shndx
*symshndxbuf
;
7683 /* Number of STT_FILE syms seen. */
7684 size_t filesym_count
;
7687 /* This struct is used to pass information to elf_link_output_extsym. */
7689 struct elf_outext_info
7692 bfd_boolean localsyms
;
7693 bfd_boolean file_sym_done
;
7694 struct elf_final_link_info
*flinfo
;
7698 /* Support for evaluating a complex relocation.
7700 Complex relocations are generalized, self-describing relocations. The
7701 implementation of them consists of two parts: complex symbols, and the
7702 relocations themselves.
7704 The relocations are use a reserved elf-wide relocation type code (R_RELC
7705 external / BFD_RELOC_RELC internal) and an encoding of relocation field
7706 information (start bit, end bit, word width, etc) into the addend. This
7707 information is extracted from CGEN-generated operand tables within gas.
7709 Complex symbols are mangled symbols (BSF_RELC external / STT_RELC
7710 internal) representing prefix-notation expressions, including but not
7711 limited to those sorts of expressions normally encoded as addends in the
7712 addend field. The symbol mangling format is:
7715 | <unary-operator> ':' <node>
7716 | <binary-operator> ':' <node> ':' <node>
7719 <literal> := 's' <digits=N> ':' <N character symbol name>
7720 | 'S' <digits=N> ':' <N character section name>
7724 <binary-operator> := as in C
7725 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
7728 set_symbol_value (bfd
*bfd_with_globals
,
7729 Elf_Internal_Sym
*isymbuf
,
7734 struct elf_link_hash_entry
**sym_hashes
;
7735 struct elf_link_hash_entry
*h
;
7736 size_t extsymoff
= locsymcount
;
7738 if (symidx
< locsymcount
)
7740 Elf_Internal_Sym
*sym
;
7742 sym
= isymbuf
+ symidx
;
7743 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
7745 /* It is a local symbol: move it to the
7746 "absolute" section and give it a value. */
7747 sym
->st_shndx
= SHN_ABS
;
7748 sym
->st_value
= val
;
7751 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
7755 /* It is a global symbol: set its link type
7756 to "defined" and give it a value. */
7758 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
7759 h
= sym_hashes
[symidx
- extsymoff
];
7760 while (h
->root
.type
== bfd_link_hash_indirect
7761 || h
->root
.type
== bfd_link_hash_warning
)
7762 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7763 h
->root
.type
= bfd_link_hash_defined
;
7764 h
->root
.u
.def
.value
= val
;
7765 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
7769 resolve_symbol (const char *name
,
7771 struct elf_final_link_info
*flinfo
,
7773 Elf_Internal_Sym
*isymbuf
,
7776 Elf_Internal_Sym
*sym
;
7777 struct bfd_link_hash_entry
*global_entry
;
7778 const char *candidate
= NULL
;
7779 Elf_Internal_Shdr
*symtab_hdr
;
7782 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
7784 for (i
= 0; i
< locsymcount
; ++ i
)
7788 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
7791 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
7792 symtab_hdr
->sh_link
,
7795 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
7796 name
, candidate
, (unsigned long) sym
->st_value
);
7798 if (candidate
&& strcmp (candidate
, name
) == 0)
7800 asection
*sec
= flinfo
->sections
[i
];
7802 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
7803 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
7805 printf ("Found symbol with value %8.8lx\n",
7806 (unsigned long) *result
);
7812 /* Hmm, haven't found it yet. perhaps it is a global. */
7813 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
7814 FALSE
, FALSE
, TRUE
);
7818 if (global_entry
->type
== bfd_link_hash_defined
7819 || global_entry
->type
== bfd_link_hash_defweak
)
7821 *result
= (global_entry
->u
.def
.value
7822 + global_entry
->u
.def
.section
->output_section
->vma
7823 + global_entry
->u
.def
.section
->output_offset
);
7825 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
7826 global_entry
->root
.string
, (unsigned long) *result
);
7834 /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in
7835 bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section
7836 names like "foo.end" which is the end address of section "foo". */
7839 resolve_section (const char *name
,
7847 for (curr
= sections
; curr
; curr
= curr
->next
)
7848 if (strcmp (curr
->name
, name
) == 0)
7850 *result
= curr
->vma
;
7854 /* Hmm. still haven't found it. try pseudo-section names. */
7855 /* FIXME: This could be coded more efficiently... */
7856 for (curr
= sections
; curr
; curr
= curr
->next
)
7858 len
= strlen (curr
->name
);
7859 if (len
> strlen (name
))
7862 if (strncmp (curr
->name
, name
, len
) == 0)
7864 if (strncmp (".end", name
+ len
, 4) == 0)
7866 *result
= curr
->vma
+ curr
->size
/ bfd_octets_per_byte (abfd
);
7870 /* Insert more pseudo-section names here, if you like. */
7878 undefined_reference (const char *reftype
, const char *name
)
7880 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
7885 eval_symbol (bfd_vma
*result
,
7888 struct elf_final_link_info
*flinfo
,
7890 Elf_Internal_Sym
*isymbuf
,
7899 const char *sym
= *symp
;
7901 bfd_boolean symbol_is_section
= FALSE
;
7906 if (len
< 1 || len
> sizeof (symbuf
))
7908 bfd_set_error (bfd_error_invalid_operation
);
7921 *result
= strtoul (sym
, (char **) symp
, 16);
7925 symbol_is_section
= TRUE
;
7928 symlen
= strtol (sym
, (char **) symp
, 10);
7929 sym
= *symp
+ 1; /* Skip the trailing ':'. */
7931 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
7933 bfd_set_error (bfd_error_invalid_operation
);
7937 memcpy (symbuf
, sym
, symlen
);
7938 symbuf
[symlen
] = '\0';
7939 *symp
= sym
+ symlen
;
7941 /* Is it always possible, with complex symbols, that gas "mis-guessed"
7942 the symbol as a section, or vice-versa. so we're pretty liberal in our
7943 interpretation here; section means "try section first", not "must be a
7944 section", and likewise with symbol. */
7946 if (symbol_is_section
)
7948 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
, input_bfd
)
7949 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7950 isymbuf
, locsymcount
))
7952 undefined_reference ("section", symbuf
);
7958 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7959 isymbuf
, locsymcount
)
7960 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
7963 undefined_reference ("symbol", symbuf
);
7970 /* All that remains are operators. */
7972 #define UNARY_OP(op) \
7973 if (strncmp (sym, #op, strlen (#op)) == 0) \
7975 sym += strlen (#op); \
7979 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7980 isymbuf, locsymcount, signed_p)) \
7983 *result = op ((bfd_signed_vma) a); \
7989 #define BINARY_OP(op) \
7990 if (strncmp (sym, #op, strlen (#op)) == 0) \
7992 sym += strlen (#op); \
7996 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7997 isymbuf, locsymcount, signed_p)) \
8000 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
8001 isymbuf, locsymcount, signed_p)) \
8004 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
8034 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
8035 bfd_set_error (bfd_error_invalid_operation
);
8041 put_value (bfd_vma size
,
8042 unsigned long chunksz
,
8047 location
+= (size
- chunksz
);
8049 for (; size
; size
-= chunksz
, location
-= chunksz
)
8054 bfd_put_8 (input_bfd
, x
, location
);
8058 bfd_put_16 (input_bfd
, x
, location
);
8062 bfd_put_32 (input_bfd
, x
, location
);
8063 /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */
8069 bfd_put_64 (input_bfd
, x
, location
);
8070 /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */
8083 get_value (bfd_vma size
,
8084 unsigned long chunksz
,
8091 /* Sanity checks. */
8092 BFD_ASSERT (chunksz
<= sizeof (x
)
8095 && (size
% chunksz
) == 0
8096 && input_bfd
!= NULL
8097 && location
!= NULL
);
8099 if (chunksz
== sizeof (x
))
8101 BFD_ASSERT (size
== chunksz
);
8103 /* Make sure that we do not perform an undefined shift operation.
8104 We know that size == chunksz so there will only be one iteration
8105 of the loop below. */
8109 shift
= 8 * chunksz
;
8111 for (; size
; size
-= chunksz
, location
+= chunksz
)
8116 x
= (x
<< shift
) | bfd_get_8 (input_bfd
, location
);
8119 x
= (x
<< shift
) | bfd_get_16 (input_bfd
, location
);
8122 x
= (x
<< shift
) | bfd_get_32 (input_bfd
, location
);
8126 x
= (x
<< shift
) | bfd_get_64 (input_bfd
, location
);
8137 decode_complex_addend (unsigned long *start
, /* in bits */
8138 unsigned long *oplen
, /* in bits */
8139 unsigned long *len
, /* in bits */
8140 unsigned long *wordsz
, /* in bytes */
8141 unsigned long *chunksz
, /* in bytes */
8142 unsigned long *lsb0_p
,
8143 unsigned long *signed_p
,
8144 unsigned long *trunc_p
,
8145 unsigned long encoded
)
8147 * start
= encoded
& 0x3F;
8148 * len
= (encoded
>> 6) & 0x3F;
8149 * oplen
= (encoded
>> 12) & 0x3F;
8150 * wordsz
= (encoded
>> 18) & 0xF;
8151 * chunksz
= (encoded
>> 22) & 0xF;
8152 * lsb0_p
= (encoded
>> 27) & 1;
8153 * signed_p
= (encoded
>> 28) & 1;
8154 * trunc_p
= (encoded
>> 29) & 1;
8157 bfd_reloc_status_type
8158 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
8159 asection
*input_section ATTRIBUTE_UNUSED
,
8161 Elf_Internal_Rela
*rel
,
8164 bfd_vma shift
, x
, mask
;
8165 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
8166 bfd_reloc_status_type r
;
8168 /* Perform this reloc, since it is complex.
8169 (this is not to say that it necessarily refers to a complex
8170 symbol; merely that it is a self-describing CGEN based reloc.
8171 i.e. the addend has the complete reloc information (bit start, end,
8172 word size, etc) encoded within it.). */
8174 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
8175 &chunksz
, &lsb0_p
, &signed_p
,
8176 &trunc_p
, rel
->r_addend
);
8178 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
8181 shift
= (start
+ 1) - len
;
8183 shift
= (8 * wordsz
) - (start
+ len
);
8185 x
= get_value (wordsz
, chunksz
, input_bfd
,
8186 contents
+ rel
->r_offset
* bfd_octets_per_byte (input_bfd
));
8189 printf ("Doing complex reloc: "
8190 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
8191 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
8192 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
8193 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
8194 oplen
, (unsigned long) x
, (unsigned long) mask
,
8195 (unsigned long) relocation
);
8200 /* Now do an overflow check. */
8201 r
= bfd_check_overflow ((signed_p
8202 ? complain_overflow_signed
8203 : complain_overflow_unsigned
),
8204 len
, 0, (8 * wordsz
),
8208 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
8211 printf (" relocation: %8.8lx\n"
8212 " shifted mask: %8.8lx\n"
8213 " shifted/masked reloc: %8.8lx\n"
8214 " result: %8.8lx\n",
8215 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
8216 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
8218 put_value (wordsz
, chunksz
, input_bfd
, x
,
8219 contents
+ rel
->r_offset
* bfd_octets_per_byte (input_bfd
));
8223 /* Functions to read r_offset from external (target order) reloc
8224 entry. Faster than bfd_getl32 et al, because we let the compiler
8225 know the value is aligned. */
8228 ext32l_r_offset (const void *p
)
8235 const union aligned32
*a
8236 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
8238 uint32_t aval
= ( (uint32_t) a
->c
[0]
8239 | (uint32_t) a
->c
[1] << 8
8240 | (uint32_t) a
->c
[2] << 16
8241 | (uint32_t) a
->c
[3] << 24);
8246 ext32b_r_offset (const void *p
)
8253 const union aligned32
*a
8254 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
8256 uint32_t aval
= ( (uint32_t) a
->c
[0] << 24
8257 | (uint32_t) a
->c
[1] << 16
8258 | (uint32_t) a
->c
[2] << 8
8259 | (uint32_t) a
->c
[3]);
8263 #ifdef BFD_HOST_64_BIT
8265 ext64l_r_offset (const void *p
)
8272 const union aligned64
*a
8273 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
8275 uint64_t aval
= ( (uint64_t) a
->c
[0]
8276 | (uint64_t) a
->c
[1] << 8
8277 | (uint64_t) a
->c
[2] << 16
8278 | (uint64_t) a
->c
[3] << 24
8279 | (uint64_t) a
->c
[4] << 32
8280 | (uint64_t) a
->c
[5] << 40
8281 | (uint64_t) a
->c
[6] << 48
8282 | (uint64_t) a
->c
[7] << 56);
8287 ext64b_r_offset (const void *p
)
8294 const union aligned64
*a
8295 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
8297 uint64_t aval
= ( (uint64_t) a
->c
[0] << 56
8298 | (uint64_t) a
->c
[1] << 48
8299 | (uint64_t) a
->c
[2] << 40
8300 | (uint64_t) a
->c
[3] << 32
8301 | (uint64_t) a
->c
[4] << 24
8302 | (uint64_t) a
->c
[5] << 16
8303 | (uint64_t) a
->c
[6] << 8
8304 | (uint64_t) a
->c
[7]);
8309 /* When performing a relocatable link, the input relocations are
8310 preserved. But, if they reference global symbols, the indices
8311 referenced must be updated. Update all the relocations found in
8315 elf_link_adjust_relocs (bfd
*abfd
,
8316 struct bfd_elf_section_reloc_data
*reldata
,
8320 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8322 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8323 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8324 bfd_vma r_type_mask
;
8326 unsigned int count
= reldata
->count
;
8327 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
8329 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
8331 swap_in
= bed
->s
->swap_reloc_in
;
8332 swap_out
= bed
->s
->swap_reloc_out
;
8334 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
8336 swap_in
= bed
->s
->swap_reloca_in
;
8337 swap_out
= bed
->s
->swap_reloca_out
;
8342 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
8345 if (bed
->s
->arch_size
== 32)
8352 r_type_mask
= 0xffffffff;
8356 erela
= reldata
->hdr
->contents
;
8357 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
8359 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
8362 if (*rel_hash
== NULL
)
8365 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
8367 (*swap_in
) (abfd
, erela
, irela
);
8368 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
8369 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
8370 | (irela
[j
].r_info
& r_type_mask
));
8371 (*swap_out
) (abfd
, irela
, erela
);
8374 if (sort
&& count
!= 0)
8376 bfd_vma (*ext_r_off
) (const void *);
8379 bfd_byte
*base
, *end
, *p
, *loc
;
8380 bfd_byte
*buf
= NULL
;
8382 if (bed
->s
->arch_size
== 32)
8384 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
8385 ext_r_off
= ext32l_r_offset
;
8386 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
8387 ext_r_off
= ext32b_r_offset
;
8393 #ifdef BFD_HOST_64_BIT
8394 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
8395 ext_r_off
= ext64l_r_offset
;
8396 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
8397 ext_r_off
= ext64b_r_offset
;
8403 /* Must use a stable sort here. A modified insertion sort,
8404 since the relocs are mostly sorted already. */
8405 elt_size
= reldata
->hdr
->sh_entsize
;
8406 base
= reldata
->hdr
->contents
;
8407 end
= base
+ count
* elt_size
;
8408 if (elt_size
> sizeof (Elf64_External_Rela
))
8411 /* Ensure the first element is lowest. This acts as a sentinel,
8412 speeding the main loop below. */
8413 r_off
= (*ext_r_off
) (base
);
8414 for (p
= loc
= base
; (p
+= elt_size
) < end
; )
8416 bfd_vma r_off2
= (*ext_r_off
) (p
);
8425 /* Don't just swap *base and *loc as that changes the order
8426 of the original base[0] and base[1] if they happen to
8427 have the same r_offset. */
8428 bfd_byte onebuf
[sizeof (Elf64_External_Rela
)];
8429 memcpy (onebuf
, loc
, elt_size
);
8430 memmove (base
+ elt_size
, base
, loc
- base
);
8431 memcpy (base
, onebuf
, elt_size
);
8434 for (p
= base
+ elt_size
; (p
+= elt_size
) < end
; )
8436 /* base to p is sorted, *p is next to insert. */
8437 r_off
= (*ext_r_off
) (p
);
8438 /* Search the sorted region for location to insert. */
8440 while (r_off
< (*ext_r_off
) (loc
))
8445 /* Chances are there is a run of relocs to insert here,
8446 from one of more input files. Files are not always
8447 linked in order due to the way elf_link_input_bfd is
8448 called. See pr17666. */
8449 size_t sortlen
= p
- loc
;
8450 bfd_vma r_off2
= (*ext_r_off
) (loc
);
8451 size_t runlen
= elt_size
;
8452 size_t buf_size
= 96 * 1024;
8453 while (p
+ runlen
< end
8454 && (sortlen
<= buf_size
8455 || runlen
+ elt_size
<= buf_size
)
8456 && r_off2
> (*ext_r_off
) (p
+ runlen
))
8460 buf
= bfd_malloc (buf_size
);
8464 if (runlen
< sortlen
)
8466 memcpy (buf
, p
, runlen
);
8467 memmove (loc
+ runlen
, loc
, sortlen
);
8468 memcpy (loc
, buf
, runlen
);
8472 memcpy (buf
, loc
, sortlen
);
8473 memmove (loc
, p
, runlen
);
8474 memcpy (loc
+ runlen
, buf
, sortlen
);
8476 p
+= runlen
- elt_size
;
8479 /* Hashes are no longer valid. */
8480 free (reldata
->hashes
);
8481 reldata
->hashes
= NULL
;
8487 struct elf_link_sort_rela
8493 enum elf_reloc_type_class type
;
8494 /* We use this as an array of size int_rels_per_ext_rel. */
8495 Elf_Internal_Rela rela
[1];
8499 elf_link_sort_cmp1 (const void *A
, const void *B
)
8501 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8502 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8503 int relativea
, relativeb
;
8505 relativea
= a
->type
== reloc_class_relative
;
8506 relativeb
= b
->type
== reloc_class_relative
;
8508 if (relativea
< relativeb
)
8510 if (relativea
> relativeb
)
8512 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
8514 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
8516 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8518 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8524 elf_link_sort_cmp2 (const void *A
, const void *B
)
8526 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8527 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8529 if (a
->type
< b
->type
)
8531 if (a
->type
> b
->type
)
8533 if (a
->u
.offset
< b
->u
.offset
)
8535 if (a
->u
.offset
> b
->u
.offset
)
8537 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8539 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8545 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
8547 asection
*dynamic_relocs
;
8550 bfd_size_type count
, size
;
8551 size_t i
, ret
, sort_elt
, ext_size
;
8552 bfd_byte
*sort
, *s_non_relative
, *p
;
8553 struct elf_link_sort_rela
*sq
;
8554 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8555 int i2e
= bed
->s
->int_rels_per_ext_rel
;
8556 unsigned int opb
= bfd_octets_per_byte (abfd
);
8557 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8558 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8559 struct bfd_link_order
*lo
;
8561 bfd_boolean use_rela
;
8563 /* Find a dynamic reloc section. */
8564 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
8565 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
8566 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
8567 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8569 bfd_boolean use_rela_initialised
= FALSE
;
8571 /* This is just here to stop gcc from complaining.
8572 Its initialization checking code is not perfect. */
8575 /* Both sections are present. Examine the sizes
8576 of the indirect sections to help us choose. */
8577 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8578 if (lo
->type
== bfd_indirect_link_order
)
8580 asection
*o
= lo
->u
.indirect
.section
;
8582 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8584 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8585 /* Section size is divisible by both rel and rela sizes.
8586 It is of no help to us. */
8590 /* Section size is only divisible by rela. */
8591 if (use_rela_initialised
&& (use_rela
== FALSE
))
8593 _bfd_error_handler (_("%B: Unable to sort relocs - "
8594 "they are in more than one size"),
8596 bfd_set_error (bfd_error_invalid_operation
);
8602 use_rela_initialised
= TRUE
;
8606 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8608 /* Section size is only divisible by rel. */
8609 if (use_rela_initialised
&& (use_rela
== TRUE
))
8611 _bfd_error_handler (_("%B: Unable to sort relocs - "
8612 "they are in more than one size"),
8614 bfd_set_error (bfd_error_invalid_operation
);
8620 use_rela_initialised
= TRUE
;
8625 /* The section size is not divisible by either -
8626 something is wrong. */
8627 _bfd_error_handler (_("%B: Unable to sort relocs - "
8628 "they are of an unknown size"), abfd
);
8629 bfd_set_error (bfd_error_invalid_operation
);
8634 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8635 if (lo
->type
== bfd_indirect_link_order
)
8637 asection
*o
= lo
->u
.indirect
.section
;
8639 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8641 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8642 /* Section size is divisible by both rel and rela sizes.
8643 It is of no help to us. */
8647 /* Section size is only divisible by rela. */
8648 if (use_rela_initialised
&& (use_rela
== FALSE
))
8650 _bfd_error_handler (_("%B: Unable to sort relocs - "
8651 "they are in more than one size"),
8653 bfd_set_error (bfd_error_invalid_operation
);
8659 use_rela_initialised
= TRUE
;
8663 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8665 /* Section size is only divisible by rel. */
8666 if (use_rela_initialised
&& (use_rela
== TRUE
))
8668 _bfd_error_handler (_("%B: Unable to sort relocs - "
8669 "they are in more than one size"),
8671 bfd_set_error (bfd_error_invalid_operation
);
8677 use_rela_initialised
= TRUE
;
8682 /* The section size is not divisible by either -
8683 something is wrong. */
8684 _bfd_error_handler (_("%B: Unable to sort relocs - "
8685 "they are of an unknown size"), abfd
);
8686 bfd_set_error (bfd_error_invalid_operation
);
8691 if (! use_rela_initialised
)
8695 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
8697 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8704 dynamic_relocs
= rela_dyn
;
8705 ext_size
= bed
->s
->sizeof_rela
;
8706 swap_in
= bed
->s
->swap_reloca_in
;
8707 swap_out
= bed
->s
->swap_reloca_out
;
8711 dynamic_relocs
= rel_dyn
;
8712 ext_size
= bed
->s
->sizeof_rel
;
8713 swap_in
= bed
->s
->swap_reloc_in
;
8714 swap_out
= bed
->s
->swap_reloc_out
;
8718 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8719 if (lo
->type
== bfd_indirect_link_order
)
8720 size
+= lo
->u
.indirect
.section
->size
;
8722 if (size
!= dynamic_relocs
->size
)
8725 sort_elt
= (sizeof (struct elf_link_sort_rela
)
8726 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
8728 count
= dynamic_relocs
->size
/ ext_size
;
8731 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
8735 (*info
->callbacks
->warning
)
8736 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0, 0);
8740 if (bed
->s
->arch_size
== 32)
8741 r_sym_mask
= ~(bfd_vma
) 0xff;
8743 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
8745 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8746 if (lo
->type
== bfd_indirect_link_order
)
8748 bfd_byte
*erel
, *erelend
;
8749 asection
*o
= lo
->u
.indirect
.section
;
8751 if (o
->contents
== NULL
&& o
->size
!= 0)
8753 /* This is a reloc section that is being handled as a normal
8754 section. See bfd_section_from_shdr. We can't combine
8755 relocs in this case. */
8760 erelend
= o
->contents
+ o
->size
;
8761 p
= sort
+ o
->output_offset
* opb
/ ext_size
* sort_elt
;
8763 while (erel
< erelend
)
8765 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8767 (*swap_in
) (abfd
, erel
, s
->rela
);
8768 s
->type
= (*bed
->elf_backend_reloc_type_class
) (info
, o
, s
->rela
);
8769 s
->u
.sym_mask
= r_sym_mask
;
8775 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
8777 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
8779 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8780 if (s
->type
!= reloc_class_relative
)
8786 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
8787 for (; i
< count
; i
++, p
+= sort_elt
)
8789 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
8790 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
8792 sp
->u
.offset
= sq
->rela
->r_offset
;
8795 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
8797 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
8798 if (htab
->srelplt
&& htab
->srelplt
->output_section
== dynamic_relocs
)
8800 /* We have plt relocs in .rela.dyn. */
8801 sq
= (struct elf_link_sort_rela
*) sort
;
8802 for (i
= 0; i
< count
; i
++)
8803 if (sq
[count
- i
- 1].type
!= reloc_class_plt
)
8805 if (i
!= 0 && htab
->srelplt
->size
== i
* ext_size
)
8807 struct bfd_link_order
**plo
;
8808 /* Put srelplt link_order last. This is so the output_offset
8809 set in the next loop is correct for DT_JMPREL. */
8810 for (plo
= &dynamic_relocs
->map_head
.link_order
; *plo
!= NULL
; )
8811 if ((*plo
)->type
== bfd_indirect_link_order
8812 && (*plo
)->u
.indirect
.section
== htab
->srelplt
)
8818 plo
= &(*plo
)->next
;
8821 dynamic_relocs
->map_tail
.link_order
= lo
;
8826 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8827 if (lo
->type
== bfd_indirect_link_order
)
8829 bfd_byte
*erel
, *erelend
;
8830 asection
*o
= lo
->u
.indirect
.section
;
8833 erelend
= o
->contents
+ o
->size
;
8834 o
->output_offset
= (p
- sort
) / sort_elt
* ext_size
/ opb
;
8835 while (erel
< erelend
)
8837 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8838 (*swap_out
) (abfd
, s
->rela
, erel
);
8845 *psec
= dynamic_relocs
;
8849 /* Add a symbol to the output symbol string table. */
8852 elf_link_output_symstrtab (struct elf_final_link_info
*flinfo
,
8854 Elf_Internal_Sym
*elfsym
,
8855 asection
*input_sec
,
8856 struct elf_link_hash_entry
*h
)
8858 int (*output_symbol_hook
)
8859 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
8860 struct elf_link_hash_entry
*);
8861 struct elf_link_hash_table
*hash_table
;
8862 const struct elf_backend_data
*bed
;
8863 bfd_size_type strtabsize
;
8865 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
8867 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8868 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
8869 if (output_symbol_hook
!= NULL
)
8871 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
8878 || (input_sec
->flags
& SEC_EXCLUDE
))
8879 elfsym
->st_name
= (unsigned long) -1;
8882 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
8883 to get the final offset for st_name. */
8885 = (unsigned long) _bfd_elf_strtab_add (flinfo
->symstrtab
,
8887 if (elfsym
->st_name
== (unsigned long) -1)
8891 hash_table
= elf_hash_table (flinfo
->info
);
8892 strtabsize
= hash_table
->strtabsize
;
8893 if (strtabsize
<= hash_table
->strtabcount
)
8895 strtabsize
+= strtabsize
;
8896 hash_table
->strtabsize
= strtabsize
;
8897 strtabsize
*= sizeof (*hash_table
->strtab
);
8899 = (struct elf_sym_strtab
*) bfd_realloc (hash_table
->strtab
,
8901 if (hash_table
->strtab
== NULL
)
8904 hash_table
->strtab
[hash_table
->strtabcount
].sym
= *elfsym
;
8905 hash_table
->strtab
[hash_table
->strtabcount
].dest_index
8906 = hash_table
->strtabcount
;
8907 hash_table
->strtab
[hash_table
->strtabcount
].destshndx_index
8908 = flinfo
->symshndxbuf
? bfd_get_symcount (flinfo
->output_bfd
) : 0;
8910 bfd_get_symcount (flinfo
->output_bfd
) += 1;
8911 hash_table
->strtabcount
+= 1;
8916 /* Swap symbols out to the symbol table and flush the output symbols to
8920 elf_link_swap_symbols_out (struct elf_final_link_info
*flinfo
)
8922 struct elf_link_hash_table
*hash_table
= elf_hash_table (flinfo
->info
);
8923 bfd_size_type amt
, i
;
8924 const struct elf_backend_data
*bed
;
8926 Elf_Internal_Shdr
*hdr
;
8930 if (!hash_table
->strtabcount
)
8933 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
8935 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8937 amt
= bed
->s
->sizeof_sym
* hash_table
->strtabcount
;
8938 symbuf
= (bfd_byte
*) bfd_malloc (amt
);
8942 if (flinfo
->symshndxbuf
)
8944 amt
= (sizeof (Elf_External_Sym_Shndx
)
8945 * (bfd_get_symcount (flinfo
->output_bfd
)));
8946 flinfo
->symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
8947 if (flinfo
->symshndxbuf
== NULL
)
8954 for (i
= 0; i
< hash_table
->strtabcount
; i
++)
8956 struct elf_sym_strtab
*elfsym
= &hash_table
->strtab
[i
];
8957 if (elfsym
->sym
.st_name
== (unsigned long) -1)
8958 elfsym
->sym
.st_name
= 0;
8961 = (unsigned long) _bfd_elf_strtab_offset (flinfo
->symstrtab
,
8962 elfsym
->sym
.st_name
);
8963 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &elfsym
->sym
,
8964 ((bfd_byte
*) symbuf
8965 + (elfsym
->dest_index
8966 * bed
->s
->sizeof_sym
)),
8967 (flinfo
->symshndxbuf
8968 + elfsym
->destshndx_index
));
8971 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
8972 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
8973 amt
= hash_table
->strtabcount
* bed
->s
->sizeof_sym
;
8974 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) == 0
8975 && bfd_bwrite (symbuf
, amt
, flinfo
->output_bfd
) == amt
)
8977 hdr
->sh_size
+= amt
;
8985 free (hash_table
->strtab
);
8986 hash_table
->strtab
= NULL
;
8991 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
8994 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
8996 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
8997 && sym
->st_shndx
< SHN_LORESERVE
)
8999 /* The gABI doesn't support dynamic symbols in output sections
9001 (*_bfd_error_handler
)
9002 (_("%B: Too many sections: %d (>= %d)"),
9003 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
9004 bfd_set_error (bfd_error_nonrepresentable_section
);
9010 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
9011 allowing an unsatisfied unversioned symbol in the DSO to match a
9012 versioned symbol that would normally require an explicit version.
9013 We also handle the case that a DSO references a hidden symbol
9014 which may be satisfied by a versioned symbol in another DSO. */
9017 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
9018 const struct elf_backend_data
*bed
,
9019 struct elf_link_hash_entry
*h
)
9022 struct elf_link_loaded_list
*loaded
;
9024 if (!is_elf_hash_table (info
->hash
))
9027 /* Check indirect symbol. */
9028 while (h
->root
.type
== bfd_link_hash_indirect
)
9029 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9031 switch (h
->root
.type
)
9037 case bfd_link_hash_undefined
:
9038 case bfd_link_hash_undefweak
:
9039 abfd
= h
->root
.u
.undef
.abfd
;
9040 if ((abfd
->flags
& DYNAMIC
) == 0
9041 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
9045 case bfd_link_hash_defined
:
9046 case bfd_link_hash_defweak
:
9047 abfd
= h
->root
.u
.def
.section
->owner
;
9050 case bfd_link_hash_common
:
9051 abfd
= h
->root
.u
.c
.p
->section
->owner
;
9054 BFD_ASSERT (abfd
!= NULL
);
9056 for (loaded
= elf_hash_table (info
)->loaded
;
9058 loaded
= loaded
->next
)
9061 Elf_Internal_Shdr
*hdr
;
9062 bfd_size_type symcount
;
9063 bfd_size_type extsymcount
;
9064 bfd_size_type extsymoff
;
9065 Elf_Internal_Shdr
*versymhdr
;
9066 Elf_Internal_Sym
*isym
;
9067 Elf_Internal_Sym
*isymend
;
9068 Elf_Internal_Sym
*isymbuf
;
9069 Elf_External_Versym
*ever
;
9070 Elf_External_Versym
*extversym
;
9072 input
= loaded
->abfd
;
9074 /* We check each DSO for a possible hidden versioned definition. */
9076 || (input
->flags
& DYNAMIC
) == 0
9077 || elf_dynversym (input
) == 0)
9080 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
9082 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9083 if (elf_bad_symtab (input
))
9085 extsymcount
= symcount
;
9090 extsymcount
= symcount
- hdr
->sh_info
;
9091 extsymoff
= hdr
->sh_info
;
9094 if (extsymcount
== 0)
9097 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
9099 if (isymbuf
== NULL
)
9102 /* Read in any version definitions. */
9103 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
9104 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
9105 if (extversym
== NULL
)
9108 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
9109 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
9110 != versymhdr
->sh_size
))
9118 ever
= extversym
+ extsymoff
;
9119 isymend
= isymbuf
+ extsymcount
;
9120 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
9123 Elf_Internal_Versym iver
;
9124 unsigned short version_index
;
9126 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
9127 || isym
->st_shndx
== SHN_UNDEF
)
9130 name
= bfd_elf_string_from_elf_section (input
,
9133 if (strcmp (name
, h
->root
.root
.string
) != 0)
9136 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
9138 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
9140 && h
->forced_local
))
9142 /* If we have a non-hidden versioned sym, then it should
9143 have provided a definition for the undefined sym unless
9144 it is defined in a non-shared object and forced local.
9149 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
9150 if (version_index
== 1 || version_index
== 2)
9152 /* This is the base or first version. We can use it. */
9166 /* Convert ELF common symbol TYPE. */
9169 elf_link_convert_common_type (struct bfd_link_info
*info
, int type
)
9171 /* Commom symbol can only appear in relocatable link. */
9172 if (!bfd_link_relocatable (info
))
9174 switch (info
->elf_stt_common
)
9178 case elf_stt_common
:
9181 case no_elf_stt_common
:
9188 /* Add an external symbol to the symbol table. This is called from
9189 the hash table traversal routine. When generating a shared object,
9190 we go through the symbol table twice. The first time we output
9191 anything that might have been forced to local scope in a version
9192 script. The second time we output the symbols that are still
9196 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
9198 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
9199 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
9200 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
9202 Elf_Internal_Sym sym
;
9203 asection
*input_sec
;
9204 const struct elf_backend_data
*bed
;
9208 /* A symbol is bound locally if it is forced local or it is locally
9209 defined, hidden versioned, not referenced by shared library and
9210 not exported when linking executable. */
9211 bfd_boolean local_bind
= (h
->forced_local
9212 || (bfd_link_executable (flinfo
->info
)
9213 && !flinfo
->info
->export_dynamic
9217 && h
->versioned
== versioned_hidden
));
9219 if (h
->root
.type
== bfd_link_hash_warning
)
9221 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9222 if (h
->root
.type
== bfd_link_hash_new
)
9226 /* Decide whether to output this symbol in this pass. */
9227 if (eoinfo
->localsyms
)
9238 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9240 if (h
->root
.type
== bfd_link_hash_undefined
)
9242 /* If we have an undefined symbol reference here then it must have
9243 come from a shared library that is being linked in. (Undefined
9244 references in regular files have already been handled unless
9245 they are in unreferenced sections which are removed by garbage
9247 bfd_boolean ignore_undef
= FALSE
;
9249 /* Some symbols may be special in that the fact that they're
9250 undefined can be safely ignored - let backend determine that. */
9251 if (bed
->elf_backend_ignore_undef_symbol
)
9252 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
9254 /* If we are reporting errors for this situation then do so now. */
9257 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
9258 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
9259 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
9260 (*flinfo
->info
->callbacks
->undefined_symbol
)
9261 (flinfo
->info
, h
->root
.root
.string
,
9262 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
,
9264 flinfo
->info
->unresolved_syms_in_shared_libs
== RM_GENERATE_ERROR
);
9266 /* Strip a global symbol defined in a discarded section. */
9271 /* We should also warn if a forced local symbol is referenced from
9272 shared libraries. */
9273 if (bfd_link_executable (flinfo
->info
)
9278 && h
->ref_dynamic_nonweak
9279 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
9283 struct elf_link_hash_entry
*hi
= h
;
9285 /* Check indirect symbol. */
9286 while (hi
->root
.type
== bfd_link_hash_indirect
)
9287 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
9289 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
9290 msg
= _("%B: internal symbol `%s' in %B is referenced by DSO");
9291 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
9292 msg
= _("%B: hidden symbol `%s' in %B is referenced by DSO");
9294 msg
= _("%B: local symbol `%s' in %B is referenced by DSO");
9295 def_bfd
= flinfo
->output_bfd
;
9296 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
9297 def_bfd
= hi
->root
.u
.def
.section
->owner
;
9298 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, def_bfd
,
9299 h
->root
.root
.string
);
9300 bfd_set_error (bfd_error_bad_value
);
9301 eoinfo
->failed
= TRUE
;
9305 /* We don't want to output symbols that have never been mentioned by
9306 a regular file, or that we have been told to strip. However, if
9307 h->indx is set to -2, the symbol is used by a reloc and we must
9312 else if ((h
->def_dynamic
9314 || h
->root
.type
== bfd_link_hash_new
)
9318 else if (flinfo
->info
->strip
== strip_all
)
9320 else if (flinfo
->info
->strip
== strip_some
9321 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
9322 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
9324 else if ((h
->root
.type
== bfd_link_hash_defined
9325 || h
->root
.type
== bfd_link_hash_defweak
)
9326 && ((flinfo
->info
->strip_discarded
9327 && discarded_section (h
->root
.u
.def
.section
))
9328 || ((h
->root
.u
.def
.section
->flags
& SEC_LINKER_CREATED
) == 0
9329 && h
->root
.u
.def
.section
->owner
!= NULL
9330 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
9332 else if ((h
->root
.type
== bfd_link_hash_undefined
9333 || h
->root
.type
== bfd_link_hash_undefweak
)
9334 && h
->root
.u
.undef
.abfd
!= NULL
9335 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
9340 /* If we're stripping it, and it's not a dynamic symbol, there's
9341 nothing else to do. However, if it is a forced local symbol or
9342 an ifunc symbol we need to give the backend finish_dynamic_symbol
9343 function a chance to make it dynamic. */
9346 && type
!= STT_GNU_IFUNC
9347 && !h
->forced_local
)
9351 sym
.st_size
= h
->size
;
9352 sym
.st_other
= h
->other
;
9353 switch (h
->root
.type
)
9356 case bfd_link_hash_new
:
9357 case bfd_link_hash_warning
:
9361 case bfd_link_hash_undefined
:
9362 case bfd_link_hash_undefweak
:
9363 input_sec
= bfd_und_section_ptr
;
9364 sym
.st_shndx
= SHN_UNDEF
;
9367 case bfd_link_hash_defined
:
9368 case bfd_link_hash_defweak
:
9370 input_sec
= h
->root
.u
.def
.section
;
9371 if (input_sec
->output_section
!= NULL
)
9374 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
9375 input_sec
->output_section
);
9376 if (sym
.st_shndx
== SHN_BAD
)
9378 (*_bfd_error_handler
)
9379 (_("%B: could not find output section %A for input section %A"),
9380 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
9381 bfd_set_error (bfd_error_nonrepresentable_section
);
9382 eoinfo
->failed
= TRUE
;
9386 /* ELF symbols in relocatable files are section relative,
9387 but in nonrelocatable files they are virtual
9389 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
9390 if (!bfd_link_relocatable (flinfo
->info
))
9392 sym
.st_value
+= input_sec
->output_section
->vma
;
9393 if (h
->type
== STT_TLS
)
9395 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
9396 if (tls_sec
!= NULL
)
9397 sym
.st_value
-= tls_sec
->vma
;
9403 BFD_ASSERT (input_sec
->owner
== NULL
9404 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
9405 sym
.st_shndx
= SHN_UNDEF
;
9406 input_sec
= bfd_und_section_ptr
;
9411 case bfd_link_hash_common
:
9412 input_sec
= h
->root
.u
.c
.p
->section
;
9413 sym
.st_shndx
= bed
->common_section_index (input_sec
);
9414 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
9417 case bfd_link_hash_indirect
:
9418 /* These symbols are created by symbol versioning. They point
9419 to the decorated version of the name. For example, if the
9420 symbol foo@@GNU_1.2 is the default, which should be used when
9421 foo is used with no version, then we add an indirect symbol
9422 foo which points to foo@@GNU_1.2. We ignore these symbols,
9423 since the indirected symbol is already in the hash table. */
9427 if (type
== STT_COMMON
|| type
== STT_OBJECT
)
9428 switch (h
->root
.type
)
9430 case bfd_link_hash_common
:
9431 type
= elf_link_convert_common_type (flinfo
->info
, type
);
9433 case bfd_link_hash_defined
:
9434 case bfd_link_hash_defweak
:
9435 if (bed
->common_definition (&sym
))
9436 type
= elf_link_convert_common_type (flinfo
->info
, type
);
9440 case bfd_link_hash_undefined
:
9441 case bfd_link_hash_undefweak
:
9449 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, type
);
9450 /* Turn off visibility on local symbol. */
9451 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
9453 /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */
9454 else if (h
->unique_global
&& h
->def_regular
)
9455 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, type
);
9456 else if (h
->root
.type
== bfd_link_hash_undefweak
9457 || h
->root
.type
== bfd_link_hash_defweak
)
9458 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, type
);
9460 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
9461 sym
.st_target_internal
= h
->target_internal
;
9463 /* Give the processor backend a chance to tweak the symbol value,
9464 and also to finish up anything that needs to be done for this
9465 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
9466 forced local syms when non-shared is due to a historical quirk.
9467 STT_GNU_IFUNC symbol must go through PLT. */
9468 if ((h
->type
== STT_GNU_IFUNC
9470 && !bfd_link_relocatable (flinfo
->info
))
9471 || ((h
->dynindx
!= -1
9473 && ((bfd_link_pic (flinfo
->info
)
9474 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
9475 || h
->root
.type
!= bfd_link_hash_undefweak
))
9476 || !h
->forced_local
)
9477 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
9479 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
9480 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
9482 eoinfo
->failed
= TRUE
;
9487 /* If we are marking the symbol as undefined, and there are no
9488 non-weak references to this symbol from a regular object, then
9489 mark the symbol as weak undefined; if there are non-weak
9490 references, mark the symbol as strong. We can't do this earlier,
9491 because it might not be marked as undefined until the
9492 finish_dynamic_symbol routine gets through with it. */
9493 if (sym
.st_shndx
== SHN_UNDEF
9495 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
9496 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
9499 type
= ELF_ST_TYPE (sym
.st_info
);
9501 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
9502 if (type
== STT_GNU_IFUNC
)
9505 if (h
->ref_regular_nonweak
)
9506 bindtype
= STB_GLOBAL
;
9508 bindtype
= STB_WEAK
;
9509 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
9512 /* If this is a symbol defined in a dynamic library, don't use the
9513 symbol size from the dynamic library. Relinking an executable
9514 against a new library may introduce gratuitous changes in the
9515 executable's symbols if we keep the size. */
9516 if (sym
.st_shndx
== SHN_UNDEF
9521 /* If a non-weak symbol with non-default visibility is not defined
9522 locally, it is a fatal error. */
9523 if (!bfd_link_relocatable (flinfo
->info
)
9524 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
9525 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
9526 && h
->root
.type
== bfd_link_hash_undefined
9531 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
9532 msg
= _("%B: protected symbol `%s' isn't defined");
9533 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
9534 msg
= _("%B: internal symbol `%s' isn't defined");
9536 msg
= _("%B: hidden symbol `%s' isn't defined");
9537 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
9538 bfd_set_error (bfd_error_bad_value
);
9539 eoinfo
->failed
= TRUE
;
9543 /* If this symbol should be put in the .dynsym section, then put it
9544 there now. We already know the symbol index. We also fill in
9545 the entry in the .hash section. */
9546 if (elf_hash_table (flinfo
->info
)->dynsym
!= NULL
9548 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
)
9552 /* Since there is no version information in the dynamic string,
9553 if there is no version info in symbol version section, we will
9554 have a run-time problem if not linking executable, referenced
9555 by shared library, not locally defined, or not bound locally.
9557 if (h
->verinfo
.verdef
== NULL
9559 && (!bfd_link_executable (flinfo
->info
)
9561 || !h
->def_regular
))
9563 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
9565 if (p
&& p
[1] != '\0')
9567 (*_bfd_error_handler
)
9568 (_("%B: No symbol version section for versioned symbol `%s'"),
9569 flinfo
->output_bfd
, h
->root
.root
.string
);
9570 eoinfo
->failed
= TRUE
;
9575 sym
.st_name
= h
->dynstr_index
;
9576 esym
= (elf_hash_table (flinfo
->info
)->dynsym
->contents
9577 + h
->dynindx
* bed
->s
->sizeof_sym
);
9578 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
9580 eoinfo
->failed
= TRUE
;
9583 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
9585 if (flinfo
->hash_sec
!= NULL
)
9587 size_t hash_entry_size
;
9588 bfd_byte
*bucketpos
;
9593 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
9594 bucket
= h
->u
.elf_hash_value
% bucketcount
;
9597 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
9598 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
9599 + (bucket
+ 2) * hash_entry_size
);
9600 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
9601 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
9603 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
9604 ((bfd_byte
*) flinfo
->hash_sec
->contents
9605 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
9608 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
9610 Elf_Internal_Versym iversym
;
9611 Elf_External_Versym
*eversym
;
9613 if (!h
->def_regular
)
9615 if (h
->verinfo
.verdef
== NULL
9616 || (elf_dyn_lib_class (h
->verinfo
.verdef
->vd_bfd
)
9617 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
| DYN_NO_NEEDED
)))
9618 iversym
.vs_vers
= 0;
9620 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
9624 if (h
->verinfo
.vertree
== NULL
)
9625 iversym
.vs_vers
= 1;
9627 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
9628 if (flinfo
->info
->create_default_symver
)
9632 /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is
9634 if (h
->versioned
== versioned_hidden
&& h
->def_regular
)
9635 iversym
.vs_vers
|= VERSYM_HIDDEN
;
9637 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
9638 eversym
+= h
->dynindx
;
9639 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
9643 /* If the symbol is undefined, and we didn't output it to .dynsym,
9644 strip it from .symtab too. Obviously we can't do this for
9645 relocatable output or when needed for --emit-relocs. */
9646 else if (input_sec
== bfd_und_section_ptr
9648 && !bfd_link_relocatable (flinfo
->info
))
9650 /* Also strip others that we couldn't earlier due to dynamic symbol
9654 if ((input_sec
->flags
& SEC_EXCLUDE
) != 0)
9657 /* Output a FILE symbol so that following locals are not associated
9658 with the wrong input file. We need one for forced local symbols
9659 if we've seen more than one FILE symbol or when we have exactly
9660 one FILE symbol but global symbols are present in a file other
9661 than the one with the FILE symbol. We also need one if linker
9662 defined symbols are present. In practice these conditions are
9663 always met, so just emit the FILE symbol unconditionally. */
9664 if (eoinfo
->localsyms
9665 && !eoinfo
->file_sym_done
9666 && eoinfo
->flinfo
->filesym_count
!= 0)
9668 Elf_Internal_Sym fsym
;
9670 memset (&fsym
, 0, sizeof (fsym
));
9671 fsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
9672 fsym
.st_shndx
= SHN_ABS
;
9673 if (!elf_link_output_symstrtab (eoinfo
->flinfo
, NULL
, &fsym
,
9674 bfd_und_section_ptr
, NULL
))
9677 eoinfo
->file_sym_done
= TRUE
;
9680 indx
= bfd_get_symcount (flinfo
->output_bfd
);
9681 ret
= elf_link_output_symstrtab (flinfo
, h
->root
.root
.string
, &sym
,
9685 eoinfo
->failed
= TRUE
;
9690 else if (h
->indx
== -2)
9696 /* Return TRUE if special handling is done for relocs in SEC against
9697 symbols defined in discarded sections. */
9700 elf_section_ignore_discarded_relocs (asection
*sec
)
9702 const struct elf_backend_data
*bed
;
9704 switch (sec
->sec_info_type
)
9706 case SEC_INFO_TYPE_STABS
:
9707 case SEC_INFO_TYPE_EH_FRAME
:
9708 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
9714 bed
= get_elf_backend_data (sec
->owner
);
9715 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
9716 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
9722 /* Return a mask saying how ld should treat relocations in SEC against
9723 symbols defined in discarded sections. If this function returns
9724 COMPLAIN set, ld will issue a warning message. If this function
9725 returns PRETEND set, and the discarded section was link-once and the
9726 same size as the kept link-once section, ld will pretend that the
9727 symbol was actually defined in the kept section. Otherwise ld will
9728 zero the reloc (at least that is the intent, but some cooperation by
9729 the target dependent code is needed, particularly for REL targets). */
9732 _bfd_elf_default_action_discarded (asection
*sec
)
9734 if (sec
->flags
& SEC_DEBUGGING
)
9737 if (strcmp (".eh_frame", sec
->name
) == 0)
9740 if (strcmp (".gcc_except_table", sec
->name
) == 0)
9743 return COMPLAIN
| PRETEND
;
9746 /* Find a match between a section and a member of a section group. */
9749 match_group_member (asection
*sec
, asection
*group
,
9750 struct bfd_link_info
*info
)
9752 asection
*first
= elf_next_in_group (group
);
9753 asection
*s
= first
;
9757 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
9760 s
= elf_next_in_group (s
);
9768 /* Check if the kept section of a discarded section SEC can be used
9769 to replace it. Return the replacement if it is OK. Otherwise return
9773 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
9777 kept
= sec
->kept_section
;
9780 if ((kept
->flags
& SEC_GROUP
) != 0)
9781 kept
= match_group_member (sec
, kept
, info
);
9783 && ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
9784 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
)))
9786 sec
->kept_section
= kept
;
9791 /* Link an input file into the linker output file. This function
9792 handles all the sections and relocations of the input file at once.
9793 This is so that we only have to read the local symbols once, and
9794 don't have to keep them in memory. */
9797 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
9799 int (*relocate_section
)
9800 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
9801 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
9803 Elf_Internal_Shdr
*symtab_hdr
;
9806 Elf_Internal_Sym
*isymbuf
;
9807 Elf_Internal_Sym
*isym
;
9808 Elf_Internal_Sym
*isymend
;
9810 asection
**ppsection
;
9812 const struct elf_backend_data
*bed
;
9813 struct elf_link_hash_entry
**sym_hashes
;
9814 bfd_size_type address_size
;
9815 bfd_vma r_type_mask
;
9817 bfd_boolean have_file_sym
= FALSE
;
9819 output_bfd
= flinfo
->output_bfd
;
9820 bed
= get_elf_backend_data (output_bfd
);
9821 relocate_section
= bed
->elf_backend_relocate_section
;
9823 /* If this is a dynamic object, we don't want to do anything here:
9824 we don't want the local symbols, and we don't want the section
9826 if ((input_bfd
->flags
& DYNAMIC
) != 0)
9829 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
9830 if (elf_bad_symtab (input_bfd
))
9832 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9837 locsymcount
= symtab_hdr
->sh_info
;
9838 extsymoff
= symtab_hdr
->sh_info
;
9841 /* Read the local symbols. */
9842 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
9843 if (isymbuf
== NULL
&& locsymcount
!= 0)
9845 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
9846 flinfo
->internal_syms
,
9847 flinfo
->external_syms
,
9848 flinfo
->locsym_shndx
);
9849 if (isymbuf
== NULL
)
9853 /* Find local symbol sections and adjust values of symbols in
9854 SEC_MERGE sections. Write out those local symbols we know are
9855 going into the output file. */
9856 isymend
= isymbuf
+ locsymcount
;
9857 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
9859 isym
++, pindex
++, ppsection
++)
9863 Elf_Internal_Sym osym
;
9869 if (elf_bad_symtab (input_bfd
))
9871 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
9878 if (isym
->st_shndx
== SHN_UNDEF
)
9879 isec
= bfd_und_section_ptr
;
9880 else if (isym
->st_shndx
== SHN_ABS
)
9881 isec
= bfd_abs_section_ptr
;
9882 else if (isym
->st_shndx
== SHN_COMMON
)
9883 isec
= bfd_com_section_ptr
;
9886 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
9889 /* Don't attempt to output symbols with st_shnx in the
9890 reserved range other than SHN_ABS and SHN_COMMON. */
9894 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
9895 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
9897 _bfd_merged_section_offset (output_bfd
, &isec
,
9898 elf_section_data (isec
)->sec_info
,
9904 /* Don't output the first, undefined, symbol. In fact, don't
9905 output any undefined local symbol. */
9906 if (isec
== bfd_und_section_ptr
)
9909 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
9911 /* We never output section symbols. Instead, we use the
9912 section symbol of the corresponding section in the output
9917 /* If we are stripping all symbols, we don't want to output this
9919 if (flinfo
->info
->strip
== strip_all
)
9922 /* If we are discarding all local symbols, we don't want to
9923 output this one. If we are generating a relocatable output
9924 file, then some of the local symbols may be required by
9925 relocs; we output them below as we discover that they are
9927 if (flinfo
->info
->discard
== discard_all
)
9930 /* If this symbol is defined in a section which we are
9931 discarding, we don't need to keep it. */
9932 if (isym
->st_shndx
!= SHN_UNDEF
9933 && isym
->st_shndx
< SHN_LORESERVE
9934 && bfd_section_removed_from_list (output_bfd
,
9935 isec
->output_section
))
9938 /* Get the name of the symbol. */
9939 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
9944 /* See if we are discarding symbols with this name. */
9945 if ((flinfo
->info
->strip
== strip_some
9946 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
9948 || (((flinfo
->info
->discard
== discard_sec_merge
9949 && (isec
->flags
& SEC_MERGE
)
9950 && !bfd_link_relocatable (flinfo
->info
))
9951 || flinfo
->info
->discard
== discard_l
)
9952 && bfd_is_local_label_name (input_bfd
, name
)))
9955 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
9957 if (input_bfd
->lto_output
)
9958 /* -flto puts a temp file name here. This means builds
9959 are not reproducible. Discard the symbol. */
9961 have_file_sym
= TRUE
;
9962 flinfo
->filesym_count
+= 1;
9966 /* In the absence of debug info, bfd_find_nearest_line uses
9967 FILE symbols to determine the source file for local
9968 function symbols. Provide a FILE symbol here if input
9969 files lack such, so that their symbols won't be
9970 associated with a previous input file. It's not the
9971 source file, but the best we can do. */
9972 have_file_sym
= TRUE
;
9973 flinfo
->filesym_count
+= 1;
9974 memset (&osym
, 0, sizeof (osym
));
9975 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
9976 osym
.st_shndx
= SHN_ABS
;
9977 if (!elf_link_output_symstrtab (flinfo
,
9978 (input_bfd
->lto_output
? NULL
9979 : input_bfd
->filename
),
9980 &osym
, bfd_abs_section_ptr
,
9987 /* Adjust the section index for the output file. */
9988 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9989 isec
->output_section
);
9990 if (osym
.st_shndx
== SHN_BAD
)
9993 /* ELF symbols in relocatable files are section relative, but
9994 in executable files they are virtual addresses. Note that
9995 this code assumes that all ELF sections have an associated
9996 BFD section with a reasonable value for output_offset; below
9997 we assume that they also have a reasonable value for
9998 output_section. Any special sections must be set up to meet
9999 these requirements. */
10000 osym
.st_value
+= isec
->output_offset
;
10001 if (!bfd_link_relocatable (flinfo
->info
))
10003 osym
.st_value
+= isec
->output_section
->vma
;
10004 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
10006 /* STT_TLS symbols are relative to PT_TLS segment base. */
10007 BFD_ASSERT (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
);
10008 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
10012 indx
= bfd_get_symcount (output_bfd
);
10013 ret
= elf_link_output_symstrtab (flinfo
, name
, &osym
, isec
, NULL
);
10020 if (bed
->s
->arch_size
== 32)
10022 r_type_mask
= 0xff;
10028 r_type_mask
= 0xffffffff;
10033 /* Relocate the contents of each section. */
10034 sym_hashes
= elf_sym_hashes (input_bfd
);
10035 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
10037 bfd_byte
*contents
;
10039 if (! o
->linker_mark
)
10041 /* This section was omitted from the link. */
10045 if (bfd_link_relocatable (flinfo
->info
)
10046 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
10048 /* Deal with the group signature symbol. */
10049 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
10050 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
10051 asection
*osec
= o
->output_section
;
10053 if (symndx
>= locsymcount
10054 || (elf_bad_symtab (input_bfd
)
10055 && flinfo
->sections
[symndx
] == NULL
))
10057 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
10058 while (h
->root
.type
== bfd_link_hash_indirect
10059 || h
->root
.type
== bfd_link_hash_warning
)
10060 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10061 /* Arrange for symbol to be output. */
10063 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
10065 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
10067 /* We'll use the output section target_index. */
10068 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
10069 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
10073 if (flinfo
->indices
[symndx
] == -1)
10075 /* Otherwise output the local symbol now. */
10076 Elf_Internal_Sym sym
= isymbuf
[symndx
];
10077 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
10082 name
= bfd_elf_string_from_elf_section (input_bfd
,
10083 symtab_hdr
->sh_link
,
10088 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
10090 if (sym
.st_shndx
== SHN_BAD
)
10093 sym
.st_value
+= o
->output_offset
;
10095 indx
= bfd_get_symcount (output_bfd
);
10096 ret
= elf_link_output_symstrtab (flinfo
, name
, &sym
, o
,
10101 flinfo
->indices
[symndx
] = indx
;
10105 elf_section_data (osec
)->this_hdr
.sh_info
10106 = flinfo
->indices
[symndx
];
10110 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
10111 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
10114 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
10116 /* Section was created by _bfd_elf_link_create_dynamic_sections
10121 /* Get the contents of the section. They have been cached by a
10122 relaxation routine. Note that o is a section in an input
10123 file, so the contents field will not have been set by any of
10124 the routines which work on output files. */
10125 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
10127 contents
= elf_section_data (o
)->this_hdr
.contents
;
10128 if (bed
->caches_rawsize
10130 && o
->rawsize
< o
->size
)
10132 memcpy (flinfo
->contents
, contents
, o
->rawsize
);
10133 contents
= flinfo
->contents
;
10138 contents
= flinfo
->contents
;
10139 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
10143 if ((o
->flags
& SEC_RELOC
) != 0)
10145 Elf_Internal_Rela
*internal_relocs
;
10146 Elf_Internal_Rela
*rel
, *relend
;
10147 int action_discarded
;
10150 /* Get the swapped relocs. */
10152 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
10153 flinfo
->internal_relocs
, FALSE
);
10154 if (internal_relocs
== NULL
10155 && o
->reloc_count
> 0)
10158 /* We need to reverse-copy input .ctors/.dtors sections if
10159 they are placed in .init_array/.finit_array for output. */
10160 if (o
->size
> address_size
10161 && ((strncmp (o
->name
, ".ctors", 6) == 0
10162 && strcmp (o
->output_section
->name
,
10163 ".init_array") == 0)
10164 || (strncmp (o
->name
, ".dtors", 6) == 0
10165 && strcmp (o
->output_section
->name
,
10166 ".fini_array") == 0))
10167 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
10169 if (o
->size
!= o
->reloc_count
* address_size
)
10171 (*_bfd_error_handler
)
10172 (_("error: %B: size of section %A is not "
10173 "multiple of address size"),
10175 bfd_set_error (bfd_error_on_input
);
10178 o
->flags
|= SEC_ELF_REVERSE_COPY
;
10181 action_discarded
= -1;
10182 if (!elf_section_ignore_discarded_relocs (o
))
10183 action_discarded
= (*bed
->action_discarded
) (o
);
10185 /* Run through the relocs evaluating complex reloc symbols and
10186 looking for relocs against symbols from discarded sections
10187 or section symbols from removed link-once sections.
10188 Complain about relocs against discarded sections. Zero
10189 relocs against removed link-once sections. */
10191 rel
= internal_relocs
;
10192 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
10193 for ( ; rel
< relend
; rel
++)
10195 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
10196 unsigned int s_type
;
10197 asection
**ps
, *sec
;
10198 struct elf_link_hash_entry
*h
= NULL
;
10199 const char *sym_name
;
10201 if (r_symndx
== STN_UNDEF
)
10204 if (r_symndx
>= locsymcount
10205 || (elf_bad_symtab (input_bfd
)
10206 && flinfo
->sections
[r_symndx
] == NULL
))
10208 h
= sym_hashes
[r_symndx
- extsymoff
];
10210 /* Badly formatted input files can contain relocs that
10211 reference non-existant symbols. Check here so that
10212 we do not seg fault. */
10217 sprintf_vma (buffer
, rel
->r_info
);
10218 (*_bfd_error_handler
)
10219 (_("error: %B contains a reloc (0x%s) for section %A "
10220 "that references a non-existent global symbol"),
10221 input_bfd
, o
, buffer
);
10222 bfd_set_error (bfd_error_bad_value
);
10226 while (h
->root
.type
== bfd_link_hash_indirect
10227 || h
->root
.type
== bfd_link_hash_warning
)
10228 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10232 /* If a plugin symbol is referenced from a non-IR file,
10233 mark the symbol as undefined. Note that the
10234 linker may attach linker created dynamic sections
10235 to the plugin bfd. Symbols defined in linker
10236 created sections are not plugin symbols. */
10237 if (h
->root
.non_ir_ref
10238 && (h
->root
.type
== bfd_link_hash_defined
10239 || h
->root
.type
== bfd_link_hash_defweak
)
10240 && (h
->root
.u
.def
.section
->flags
10241 & SEC_LINKER_CREATED
) == 0
10242 && h
->root
.u
.def
.section
->owner
!= NULL
10243 && (h
->root
.u
.def
.section
->owner
->flags
10244 & BFD_PLUGIN
) != 0)
10246 h
->root
.type
= bfd_link_hash_undefined
;
10247 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
10251 if (h
->root
.type
== bfd_link_hash_defined
10252 || h
->root
.type
== bfd_link_hash_defweak
)
10253 ps
= &h
->root
.u
.def
.section
;
10255 sym_name
= h
->root
.root
.string
;
10259 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
10261 s_type
= ELF_ST_TYPE (sym
->st_info
);
10262 ps
= &flinfo
->sections
[r_symndx
];
10263 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
10267 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
10268 && !bfd_link_relocatable (flinfo
->info
))
10271 bfd_vma dot
= (rel
->r_offset
10272 + o
->output_offset
+ o
->output_section
->vma
);
10274 printf ("Encountered a complex symbol!");
10275 printf (" (input_bfd %s, section %s, reloc %ld\n",
10276 input_bfd
->filename
, o
->name
,
10277 (long) (rel
- internal_relocs
));
10278 printf (" symbol: idx %8.8lx, name %s\n",
10279 r_symndx
, sym_name
);
10280 printf (" reloc : info %8.8lx, addr %8.8lx\n",
10281 (unsigned long) rel
->r_info
,
10282 (unsigned long) rel
->r_offset
);
10284 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
10285 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
10288 /* Symbol evaluated OK. Update to absolute value. */
10289 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
10294 if (action_discarded
!= -1 && ps
!= NULL
)
10296 /* Complain if the definition comes from a
10297 discarded section. */
10298 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
10300 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
10301 if (action_discarded
& COMPLAIN
)
10302 (*flinfo
->info
->callbacks
->einfo
)
10303 (_("%X`%s' referenced in section `%A' of %B: "
10304 "defined in discarded section `%A' of %B\n"),
10305 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
10307 /* Try to do the best we can to support buggy old
10308 versions of gcc. Pretend that the symbol is
10309 really defined in the kept linkonce section.
10310 FIXME: This is quite broken. Modifying the
10311 symbol here means we will be changing all later
10312 uses of the symbol, not just in this section. */
10313 if (action_discarded
& PRETEND
)
10317 kept
= _bfd_elf_check_kept_section (sec
,
10329 /* Relocate the section by invoking a back end routine.
10331 The back end routine is responsible for adjusting the
10332 section contents as necessary, and (if using Rela relocs
10333 and generating a relocatable output file) adjusting the
10334 reloc addend as necessary.
10336 The back end routine does not have to worry about setting
10337 the reloc address or the reloc symbol index.
10339 The back end routine is given a pointer to the swapped in
10340 internal symbols, and can access the hash table entries
10341 for the external symbols via elf_sym_hashes (input_bfd).
10343 When generating relocatable output, the back end routine
10344 must handle STB_LOCAL/STT_SECTION symbols specially. The
10345 output symbol is going to be a section symbol
10346 corresponding to the output section, which will require
10347 the addend to be adjusted. */
10349 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
10350 input_bfd
, o
, contents
,
10358 || bfd_link_relocatable (flinfo
->info
)
10359 || flinfo
->info
->emitrelocations
)
10361 Elf_Internal_Rela
*irela
;
10362 Elf_Internal_Rela
*irelaend
, *irelamid
;
10363 bfd_vma last_offset
;
10364 struct elf_link_hash_entry
**rel_hash
;
10365 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
10366 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
10367 unsigned int next_erel
;
10368 bfd_boolean rela_normal
;
10369 struct bfd_elf_section_data
*esdi
, *esdo
;
10371 esdi
= elf_section_data (o
);
10372 esdo
= elf_section_data (o
->output_section
);
10373 rela_normal
= FALSE
;
10375 /* Adjust the reloc addresses and symbol indices. */
10377 irela
= internal_relocs
;
10378 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
10379 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
10380 /* We start processing the REL relocs, if any. When we reach
10381 IRELAMID in the loop, we switch to the RELA relocs. */
10383 if (esdi
->rel
.hdr
!= NULL
)
10384 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
10385 * bed
->s
->int_rels_per_ext_rel
);
10386 rel_hash_list
= rel_hash
;
10387 rela_hash_list
= NULL
;
10388 last_offset
= o
->output_offset
;
10389 if (!bfd_link_relocatable (flinfo
->info
))
10390 last_offset
+= o
->output_section
->vma
;
10391 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
10393 unsigned long r_symndx
;
10395 Elf_Internal_Sym sym
;
10397 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
10403 if (irela
== irelamid
)
10405 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
10406 rela_hash_list
= rel_hash
;
10407 rela_normal
= bed
->rela_normal
;
10410 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
10413 if (irela
->r_offset
>= (bfd_vma
) -2)
10415 /* This is a reloc for a deleted entry or somesuch.
10416 Turn it into an R_*_NONE reloc, at the same
10417 offset as the last reloc. elf_eh_frame.c and
10418 bfd_elf_discard_info rely on reloc offsets
10420 irela
->r_offset
= last_offset
;
10422 irela
->r_addend
= 0;
10426 irela
->r_offset
+= o
->output_offset
;
10428 /* Relocs in an executable have to be virtual addresses. */
10429 if (!bfd_link_relocatable (flinfo
->info
))
10430 irela
->r_offset
+= o
->output_section
->vma
;
10432 last_offset
= irela
->r_offset
;
10434 r_symndx
= irela
->r_info
>> r_sym_shift
;
10435 if (r_symndx
== STN_UNDEF
)
10438 if (r_symndx
>= locsymcount
10439 || (elf_bad_symtab (input_bfd
)
10440 && flinfo
->sections
[r_symndx
] == NULL
))
10442 struct elf_link_hash_entry
*rh
;
10443 unsigned long indx
;
10445 /* This is a reloc against a global symbol. We
10446 have not yet output all the local symbols, so
10447 we do not know the symbol index of any global
10448 symbol. We set the rel_hash entry for this
10449 reloc to point to the global hash table entry
10450 for this symbol. The symbol index is then
10451 set at the end of bfd_elf_final_link. */
10452 indx
= r_symndx
- extsymoff
;
10453 rh
= elf_sym_hashes (input_bfd
)[indx
];
10454 while (rh
->root
.type
== bfd_link_hash_indirect
10455 || rh
->root
.type
== bfd_link_hash_warning
)
10456 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
10458 /* Setting the index to -2 tells
10459 elf_link_output_extsym that this symbol is
10460 used by a reloc. */
10461 BFD_ASSERT (rh
->indx
< 0);
10469 /* This is a reloc against a local symbol. */
10472 sym
= isymbuf
[r_symndx
];
10473 sec
= flinfo
->sections
[r_symndx
];
10474 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
10476 /* I suppose the backend ought to fill in the
10477 section of any STT_SECTION symbol against a
10478 processor specific section. */
10479 r_symndx
= STN_UNDEF
;
10480 if (bfd_is_abs_section (sec
))
10482 else if (sec
== NULL
|| sec
->owner
== NULL
)
10484 bfd_set_error (bfd_error_bad_value
);
10489 asection
*osec
= sec
->output_section
;
10491 /* If we have discarded a section, the output
10492 section will be the absolute section. In
10493 case of discarded SEC_MERGE sections, use
10494 the kept section. relocate_section should
10495 have already handled discarded linkonce
10497 if (bfd_is_abs_section (osec
)
10498 && sec
->kept_section
!= NULL
10499 && sec
->kept_section
->output_section
!= NULL
)
10501 osec
= sec
->kept_section
->output_section
;
10502 irela
->r_addend
-= osec
->vma
;
10505 if (!bfd_is_abs_section (osec
))
10507 r_symndx
= osec
->target_index
;
10508 if (r_symndx
== STN_UNDEF
)
10510 irela
->r_addend
+= osec
->vma
;
10511 osec
= _bfd_nearby_section (output_bfd
, osec
,
10513 irela
->r_addend
-= osec
->vma
;
10514 r_symndx
= osec
->target_index
;
10519 /* Adjust the addend according to where the
10520 section winds up in the output section. */
10522 irela
->r_addend
+= sec
->output_offset
;
10526 if (flinfo
->indices
[r_symndx
] == -1)
10528 unsigned long shlink
;
10533 if (flinfo
->info
->strip
== strip_all
)
10535 /* You can't do ld -r -s. */
10536 bfd_set_error (bfd_error_invalid_operation
);
10540 /* This symbol was skipped earlier, but
10541 since it is needed by a reloc, we
10542 must output it now. */
10543 shlink
= symtab_hdr
->sh_link
;
10544 name
= (bfd_elf_string_from_elf_section
10545 (input_bfd
, shlink
, sym
.st_name
));
10549 osec
= sec
->output_section
;
10551 _bfd_elf_section_from_bfd_section (output_bfd
,
10553 if (sym
.st_shndx
== SHN_BAD
)
10556 sym
.st_value
+= sec
->output_offset
;
10557 if (!bfd_link_relocatable (flinfo
->info
))
10559 sym
.st_value
+= osec
->vma
;
10560 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
10562 /* STT_TLS symbols are relative to PT_TLS
10564 BFD_ASSERT (elf_hash_table (flinfo
->info
)
10565 ->tls_sec
!= NULL
);
10566 sym
.st_value
-= (elf_hash_table (flinfo
->info
)
10571 indx
= bfd_get_symcount (output_bfd
);
10572 ret
= elf_link_output_symstrtab (flinfo
, name
,
10578 flinfo
->indices
[r_symndx
] = indx
;
10583 r_symndx
= flinfo
->indices
[r_symndx
];
10586 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
10587 | (irela
->r_info
& r_type_mask
));
10590 /* Swap out the relocs. */
10591 input_rel_hdr
= esdi
->rel
.hdr
;
10592 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
10594 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
10599 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
10600 * bed
->s
->int_rels_per_ext_rel
);
10601 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
10604 input_rela_hdr
= esdi
->rela
.hdr
;
10605 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
10607 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
10616 /* Write out the modified section contents. */
10617 if (bed
->elf_backend_write_section
10618 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
10621 /* Section written out. */
10623 else switch (o
->sec_info_type
)
10625 case SEC_INFO_TYPE_STABS
:
10626 if (! (_bfd_write_section_stabs
10628 &elf_hash_table (flinfo
->info
)->stab_info
,
10629 o
, &elf_section_data (o
)->sec_info
, contents
)))
10632 case SEC_INFO_TYPE_MERGE
:
10633 if (! _bfd_write_merged_section (output_bfd
, o
,
10634 elf_section_data (o
)->sec_info
))
10637 case SEC_INFO_TYPE_EH_FRAME
:
10639 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
10644 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
10646 if (! _bfd_elf_write_section_eh_frame_entry (output_bfd
,
10654 if (! (o
->flags
& SEC_EXCLUDE
))
10656 file_ptr offset
= (file_ptr
) o
->output_offset
;
10657 bfd_size_type todo
= o
->size
;
10659 offset
*= bfd_octets_per_byte (output_bfd
);
10661 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
10663 /* Reverse-copy input section to output. */
10666 todo
-= address_size
;
10667 if (! bfd_set_section_contents (output_bfd
,
10675 offset
+= address_size
;
10679 else if (! bfd_set_section_contents (output_bfd
,
10693 /* Generate a reloc when linking an ELF file. This is a reloc
10694 requested by the linker, and does not come from any input file. This
10695 is used to build constructor and destructor tables when linking
10699 elf_reloc_link_order (bfd
*output_bfd
,
10700 struct bfd_link_info
*info
,
10701 asection
*output_section
,
10702 struct bfd_link_order
*link_order
)
10704 reloc_howto_type
*howto
;
10708 struct bfd_elf_section_reloc_data
*reldata
;
10709 struct elf_link_hash_entry
**rel_hash_ptr
;
10710 Elf_Internal_Shdr
*rel_hdr
;
10711 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
10712 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
10715 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
10717 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
10720 bfd_set_error (bfd_error_bad_value
);
10724 addend
= link_order
->u
.reloc
.p
->addend
;
10727 reldata
= &esdo
->rel
;
10728 else if (esdo
->rela
.hdr
)
10729 reldata
= &esdo
->rela
;
10736 /* Figure out the symbol index. */
10737 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
10738 if (link_order
->type
== bfd_section_reloc_link_order
)
10740 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
10741 BFD_ASSERT (indx
!= 0);
10742 *rel_hash_ptr
= NULL
;
10746 struct elf_link_hash_entry
*h
;
10748 /* Treat a reloc against a defined symbol as though it were
10749 actually against the section. */
10750 h
= ((struct elf_link_hash_entry
*)
10751 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
10752 link_order
->u
.reloc
.p
->u
.name
,
10753 FALSE
, FALSE
, TRUE
));
10755 && (h
->root
.type
== bfd_link_hash_defined
10756 || h
->root
.type
== bfd_link_hash_defweak
))
10760 section
= h
->root
.u
.def
.section
;
10761 indx
= section
->output_section
->target_index
;
10762 *rel_hash_ptr
= NULL
;
10763 /* It seems that we ought to add the symbol value to the
10764 addend here, but in practice it has already been added
10765 because it was passed to constructor_callback. */
10766 addend
+= section
->output_section
->vma
+ section
->output_offset
;
10768 else if (h
!= NULL
)
10770 /* Setting the index to -2 tells elf_link_output_extsym that
10771 this symbol is used by a reloc. */
10778 (*info
->callbacks
->unattached_reloc
)
10779 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0);
10784 /* If this is an inplace reloc, we must write the addend into the
10786 if (howto
->partial_inplace
&& addend
!= 0)
10788 bfd_size_type size
;
10789 bfd_reloc_status_type rstat
;
10792 const char *sym_name
;
10794 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
10795 buf
= (bfd_byte
*) bfd_zmalloc (size
);
10796 if (buf
== NULL
&& size
!= 0)
10798 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
10805 case bfd_reloc_outofrange
:
10808 case bfd_reloc_overflow
:
10809 if (link_order
->type
== bfd_section_reloc_link_order
)
10810 sym_name
= bfd_section_name (output_bfd
,
10811 link_order
->u
.reloc
.p
->u
.section
);
10813 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
10814 (*info
->callbacks
->reloc_overflow
) (info
, NULL
, sym_name
,
10815 howto
->name
, addend
, NULL
, NULL
,
10820 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
10822 * bfd_octets_per_byte (output_bfd
),
10829 /* The address of a reloc is relative to the section in a
10830 relocatable file, and is a virtual address in an executable
10832 offset
= link_order
->offset
;
10833 if (! bfd_link_relocatable (info
))
10834 offset
+= output_section
->vma
;
10836 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
10838 irel
[i
].r_offset
= offset
;
10839 irel
[i
].r_info
= 0;
10840 irel
[i
].r_addend
= 0;
10842 if (bed
->s
->arch_size
== 32)
10843 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
10845 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
10847 rel_hdr
= reldata
->hdr
;
10848 erel
= rel_hdr
->contents
;
10849 if (rel_hdr
->sh_type
== SHT_REL
)
10851 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
10852 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
10856 irel
[0].r_addend
= addend
;
10857 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
10858 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
10867 /* Get the output vma of the section pointed to by the sh_link field. */
10870 elf_get_linked_section_vma (struct bfd_link_order
*p
)
10872 Elf_Internal_Shdr
**elf_shdrp
;
10876 s
= p
->u
.indirect
.section
;
10877 elf_shdrp
= elf_elfsections (s
->owner
);
10878 elfsec
= _bfd_elf_section_from_bfd_section (s
->owner
, s
);
10879 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
10881 The Intel C compiler generates SHT_IA_64_UNWIND with
10882 SHF_LINK_ORDER. But it doesn't set the sh_link or
10883 sh_info fields. Hence we could get the situation
10884 where elfsec is 0. */
10887 const struct elf_backend_data
*bed
10888 = get_elf_backend_data (s
->owner
);
10889 if (bed
->link_order_error_handler
)
10890 bed
->link_order_error_handler
10891 (_("%B: warning: sh_link not set for section `%A'"), s
->owner
, s
);
10896 s
= elf_shdrp
[elfsec
]->bfd_section
;
10897 return s
->output_section
->vma
+ s
->output_offset
;
10902 /* Compare two sections based on the locations of the sections they are
10903 linked to. Used by elf_fixup_link_order. */
10906 compare_link_order (const void * a
, const void * b
)
10911 apos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)a
);
10912 bpos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)b
);
10915 return apos
> bpos
;
10919 /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
10920 order as their linked sections. Returns false if this could not be done
10921 because an output section includes both ordered and unordered
10922 sections. Ideally we'd do this in the linker proper. */
10925 elf_fixup_link_order (bfd
*abfd
, asection
*o
)
10927 int seen_linkorder
;
10930 struct bfd_link_order
*p
;
10932 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10934 struct bfd_link_order
**sections
;
10935 asection
*s
, *other_sec
, *linkorder_sec
;
10939 linkorder_sec
= NULL
;
10941 seen_linkorder
= 0;
10942 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10944 if (p
->type
== bfd_indirect_link_order
)
10946 s
= p
->u
.indirect
.section
;
10948 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10949 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
10950 && (elfsec
= _bfd_elf_section_from_bfd_section (sub
, s
))
10951 && elfsec
< elf_numsections (sub
)
10952 && elf_elfsections (sub
)[elfsec
]->sh_flags
& SHF_LINK_ORDER
10953 && elf_elfsections (sub
)[elfsec
]->sh_link
< elf_numsections (sub
))
10967 if (seen_other
&& seen_linkorder
)
10969 if (other_sec
&& linkorder_sec
)
10970 (*_bfd_error_handler
) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"),
10972 linkorder_sec
->owner
, other_sec
,
10975 (*_bfd_error_handler
) (_("%A has both ordered and unordered sections"),
10977 bfd_set_error (bfd_error_bad_value
);
10982 if (!seen_linkorder
)
10985 sections
= (struct bfd_link_order
**)
10986 bfd_malloc (seen_linkorder
* sizeof (struct bfd_link_order
*));
10987 if (sections
== NULL
)
10989 seen_linkorder
= 0;
10991 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10993 sections
[seen_linkorder
++] = p
;
10995 /* Sort the input sections in the order of their linked section. */
10996 qsort (sections
, seen_linkorder
, sizeof (struct bfd_link_order
*),
10997 compare_link_order
);
10999 /* Change the offsets of the sections. */
11001 for (n
= 0; n
< seen_linkorder
; n
++)
11003 s
= sections
[n
]->u
.indirect
.section
;
11004 offset
&= ~(bfd_vma
) 0 << s
->alignment_power
;
11005 s
->output_offset
= offset
/ bfd_octets_per_byte (abfd
);
11006 sections
[n
]->offset
= offset
;
11007 offset
+= sections
[n
]->size
;
11015 elf_final_link_free (bfd
*obfd
, struct elf_final_link_info
*flinfo
)
11019 if (flinfo
->symstrtab
!= NULL
)
11020 _bfd_elf_strtab_free (flinfo
->symstrtab
);
11021 if (flinfo
->contents
!= NULL
)
11022 free (flinfo
->contents
);
11023 if (flinfo
->external_relocs
!= NULL
)
11024 free (flinfo
->external_relocs
);
11025 if (flinfo
->internal_relocs
!= NULL
)
11026 free (flinfo
->internal_relocs
);
11027 if (flinfo
->external_syms
!= NULL
)
11028 free (flinfo
->external_syms
);
11029 if (flinfo
->locsym_shndx
!= NULL
)
11030 free (flinfo
->locsym_shndx
);
11031 if (flinfo
->internal_syms
!= NULL
)
11032 free (flinfo
->internal_syms
);
11033 if (flinfo
->indices
!= NULL
)
11034 free (flinfo
->indices
);
11035 if (flinfo
->sections
!= NULL
)
11036 free (flinfo
->sections
);
11037 if (flinfo
->symshndxbuf
!= NULL
)
11038 free (flinfo
->symshndxbuf
);
11039 for (o
= obfd
->sections
; o
!= NULL
; o
= o
->next
)
11041 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11042 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
11043 free (esdo
->rel
.hashes
);
11044 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
11045 free (esdo
->rela
.hashes
);
11049 /* Do the final step of an ELF link. */
11052 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
11054 bfd_boolean dynamic
;
11055 bfd_boolean emit_relocs
;
11057 struct elf_final_link_info flinfo
;
11059 struct bfd_link_order
*p
;
11061 bfd_size_type max_contents_size
;
11062 bfd_size_type max_external_reloc_size
;
11063 bfd_size_type max_internal_reloc_count
;
11064 bfd_size_type max_sym_count
;
11065 bfd_size_type max_sym_shndx_count
;
11066 Elf_Internal_Sym elfsym
;
11068 Elf_Internal_Shdr
*symtab_hdr
;
11069 Elf_Internal_Shdr
*symtab_shndx_hdr
;
11070 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11071 struct elf_outext_info eoinfo
;
11072 bfd_boolean merged
;
11073 size_t relativecount
= 0;
11074 asection
*reldyn
= 0;
11076 asection
*attr_section
= NULL
;
11077 bfd_vma attr_size
= 0;
11078 const char *std_attrs_section
;
11080 if (! is_elf_hash_table (info
->hash
))
11083 if (bfd_link_pic (info
))
11084 abfd
->flags
|= DYNAMIC
;
11086 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
11087 dynobj
= elf_hash_table (info
)->dynobj
;
11089 emit_relocs
= (bfd_link_relocatable (info
)
11090 || info
->emitrelocations
);
11092 flinfo
.info
= info
;
11093 flinfo
.output_bfd
= abfd
;
11094 flinfo
.symstrtab
= _bfd_elf_strtab_init ();
11095 if (flinfo
.symstrtab
== NULL
)
11100 flinfo
.hash_sec
= NULL
;
11101 flinfo
.symver_sec
= NULL
;
11105 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
11106 /* Note that dynsym_sec can be NULL (on VMS). */
11107 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
11108 /* Note that it is OK if symver_sec is NULL. */
11111 flinfo
.contents
= NULL
;
11112 flinfo
.external_relocs
= NULL
;
11113 flinfo
.internal_relocs
= NULL
;
11114 flinfo
.external_syms
= NULL
;
11115 flinfo
.locsym_shndx
= NULL
;
11116 flinfo
.internal_syms
= NULL
;
11117 flinfo
.indices
= NULL
;
11118 flinfo
.sections
= NULL
;
11119 flinfo
.symshndxbuf
= NULL
;
11120 flinfo
.filesym_count
= 0;
11122 /* The object attributes have been merged. Remove the input
11123 sections from the link, and set the contents of the output
11125 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
11126 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11128 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
11129 || strcmp (o
->name
, ".gnu.attributes") == 0)
11131 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11133 asection
*input_section
;
11135 if (p
->type
!= bfd_indirect_link_order
)
11137 input_section
= p
->u
.indirect
.section
;
11138 /* Hack: reset the SEC_HAS_CONTENTS flag so that
11139 elf_link_input_bfd ignores this section. */
11140 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
11143 attr_size
= bfd_elf_obj_attr_size (abfd
);
11146 bfd_set_section_size (abfd
, o
, attr_size
);
11148 /* Skip this section later on. */
11149 o
->map_head
.link_order
= NULL
;
11152 o
->flags
|= SEC_EXCLUDE
;
11156 /* Count up the number of relocations we will output for each output
11157 section, so that we know the sizes of the reloc sections. We
11158 also figure out some maximum sizes. */
11159 max_contents_size
= 0;
11160 max_external_reloc_size
= 0;
11161 max_internal_reloc_count
= 0;
11163 max_sym_shndx_count
= 0;
11165 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11167 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11168 o
->reloc_count
= 0;
11170 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11172 unsigned int reloc_count
= 0;
11173 unsigned int additional_reloc_count
= 0;
11174 struct bfd_elf_section_data
*esdi
= NULL
;
11176 if (p
->type
== bfd_section_reloc_link_order
11177 || p
->type
== bfd_symbol_reloc_link_order
)
11179 else if (p
->type
== bfd_indirect_link_order
)
11183 sec
= p
->u
.indirect
.section
;
11184 esdi
= elf_section_data (sec
);
11186 /* Mark all sections which are to be included in the
11187 link. This will normally be every section. We need
11188 to do this so that we can identify any sections which
11189 the linker has decided to not include. */
11190 sec
->linker_mark
= TRUE
;
11192 if (sec
->flags
& SEC_MERGE
)
11195 if (esdo
->this_hdr
.sh_type
== SHT_REL
11196 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
11197 /* Some backends use reloc_count in relocation sections
11198 to count particular types of relocs. Of course,
11199 reloc sections themselves can't have relocations. */
11201 else if (emit_relocs
)
11203 reloc_count
= sec
->reloc_count
;
11204 if (bed
->elf_backend_count_additional_relocs
)
11207 c
= (*bed
->elf_backend_count_additional_relocs
) (sec
);
11208 additional_reloc_count
+= c
;
11211 else if (bed
->elf_backend_count_relocs
)
11212 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
11214 if (sec
->rawsize
> max_contents_size
)
11215 max_contents_size
= sec
->rawsize
;
11216 if (sec
->size
> max_contents_size
)
11217 max_contents_size
= sec
->size
;
11219 /* We are interested in just local symbols, not all
11221 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
11222 && (sec
->owner
->flags
& DYNAMIC
) == 0)
11226 if (elf_bad_symtab (sec
->owner
))
11227 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
11228 / bed
->s
->sizeof_sym
);
11230 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
11232 if (sym_count
> max_sym_count
)
11233 max_sym_count
= sym_count
;
11235 if (sym_count
> max_sym_shndx_count
11236 && elf_symtab_shndx_list (sec
->owner
) != NULL
)
11237 max_sym_shndx_count
= sym_count
;
11239 if ((sec
->flags
& SEC_RELOC
) != 0)
11241 size_t ext_size
= 0;
11243 if (esdi
->rel
.hdr
!= NULL
)
11244 ext_size
= esdi
->rel
.hdr
->sh_size
;
11245 if (esdi
->rela
.hdr
!= NULL
)
11246 ext_size
+= esdi
->rela
.hdr
->sh_size
;
11248 if (ext_size
> max_external_reloc_size
)
11249 max_external_reloc_size
= ext_size
;
11250 if (sec
->reloc_count
> max_internal_reloc_count
)
11251 max_internal_reloc_count
= sec
->reloc_count
;
11256 if (reloc_count
== 0)
11259 reloc_count
+= additional_reloc_count
;
11260 o
->reloc_count
+= reloc_count
;
11262 if (p
->type
== bfd_indirect_link_order
&& emit_relocs
)
11266 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
11267 esdo
->rel
.count
+= additional_reloc_count
;
11269 if (esdi
->rela
.hdr
)
11271 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
11272 esdo
->rela
.count
+= additional_reloc_count
;
11278 esdo
->rela
.count
+= reloc_count
;
11280 esdo
->rel
.count
+= reloc_count
;
11284 if (o
->reloc_count
> 0)
11285 o
->flags
|= SEC_RELOC
;
11288 /* Explicitly clear the SEC_RELOC flag. The linker tends to
11289 set it (this is probably a bug) and if it is set
11290 assign_section_numbers will create a reloc section. */
11291 o
->flags
&=~ SEC_RELOC
;
11294 /* If the SEC_ALLOC flag is not set, force the section VMA to
11295 zero. This is done in elf_fake_sections as well, but forcing
11296 the VMA to 0 here will ensure that relocs against these
11297 sections are handled correctly. */
11298 if ((o
->flags
& SEC_ALLOC
) == 0
11299 && ! o
->user_set_vma
)
11303 if (! bfd_link_relocatable (info
) && merged
)
11304 elf_link_hash_traverse (elf_hash_table (info
),
11305 _bfd_elf_link_sec_merge_syms
, abfd
);
11307 /* Figure out the file positions for everything but the symbol table
11308 and the relocs. We set symcount to force assign_section_numbers
11309 to create a symbol table. */
11310 bfd_get_symcount (abfd
) = info
->strip
!= strip_all
|| emit_relocs
;
11311 BFD_ASSERT (! abfd
->output_has_begun
);
11312 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
11315 /* Set sizes, and assign file positions for reloc sections. */
11316 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11318 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11319 if ((o
->flags
& SEC_RELOC
) != 0)
11322 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
11326 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
11330 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
11331 to count upwards while actually outputting the relocations. */
11332 esdo
->rel
.count
= 0;
11333 esdo
->rela
.count
= 0;
11335 if (esdo
->this_hdr
.sh_offset
== (file_ptr
) -1)
11337 /* Cache the section contents so that they can be compressed
11338 later. Use bfd_malloc since it will be freed by
11339 bfd_compress_section_contents. */
11340 unsigned char *contents
= esdo
->this_hdr
.contents
;
11341 if ((o
->flags
& SEC_ELF_COMPRESS
) == 0 || contents
!= NULL
)
11344 = (unsigned char *) bfd_malloc (esdo
->this_hdr
.sh_size
);
11345 if (contents
== NULL
)
11347 esdo
->this_hdr
.contents
= contents
;
11351 /* We have now assigned file positions for all the sections except
11352 .symtab, .strtab, and non-loaded reloc sections. We start the
11353 .symtab section at the current file position, and write directly
11354 to it. We build the .strtab section in memory. */
11355 bfd_get_symcount (abfd
) = 0;
11356 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11357 /* sh_name is set in prep_headers. */
11358 symtab_hdr
->sh_type
= SHT_SYMTAB
;
11359 /* sh_flags, sh_addr and sh_size all start off zero. */
11360 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
11361 /* sh_link is set in assign_section_numbers. */
11362 /* sh_info is set below. */
11363 /* sh_offset is set just below. */
11364 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
11366 if (max_sym_count
< 20)
11367 max_sym_count
= 20;
11368 elf_hash_table (info
)->strtabsize
= max_sym_count
;
11369 amt
= max_sym_count
* sizeof (struct elf_sym_strtab
);
11370 elf_hash_table (info
)->strtab
11371 = (struct elf_sym_strtab
*) bfd_malloc (amt
);
11372 if (elf_hash_table (info
)->strtab
== NULL
)
11374 /* The real buffer will be allocated in elf_link_swap_symbols_out. */
11376 = (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF)
11377 ? (Elf_External_Sym_Shndx
*) -1 : NULL
);
11379 if (info
->strip
!= strip_all
|| emit_relocs
)
11381 file_ptr off
= elf_next_file_pos (abfd
);
11383 _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
11385 /* Note that at this point elf_next_file_pos (abfd) is
11386 incorrect. We do not yet know the size of the .symtab section.
11387 We correct next_file_pos below, after we do know the size. */
11389 /* Start writing out the symbol table. The first symbol is always a
11391 elfsym
.st_value
= 0;
11392 elfsym
.st_size
= 0;
11393 elfsym
.st_info
= 0;
11394 elfsym
.st_other
= 0;
11395 elfsym
.st_shndx
= SHN_UNDEF
;
11396 elfsym
.st_target_internal
= 0;
11397 if (elf_link_output_symstrtab (&flinfo
, NULL
, &elfsym
,
11398 bfd_und_section_ptr
, NULL
) != 1)
11401 /* Output a symbol for each section. We output these even if we are
11402 discarding local symbols, since they are used for relocs. These
11403 symbols have no names. We store the index of each one in the
11404 index field of the section, so that we can find it again when
11405 outputting relocs. */
11407 elfsym
.st_size
= 0;
11408 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
11409 elfsym
.st_other
= 0;
11410 elfsym
.st_value
= 0;
11411 elfsym
.st_target_internal
= 0;
11412 for (i
= 1; i
< elf_numsections (abfd
); i
++)
11414 o
= bfd_section_from_elf_index (abfd
, i
);
11417 o
->target_index
= bfd_get_symcount (abfd
);
11418 elfsym
.st_shndx
= i
;
11419 if (!bfd_link_relocatable (info
))
11420 elfsym
.st_value
= o
->vma
;
11421 if (elf_link_output_symstrtab (&flinfo
, NULL
, &elfsym
, o
,
11428 /* Allocate some memory to hold information read in from the input
11430 if (max_contents_size
!= 0)
11432 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
11433 if (flinfo
.contents
== NULL
)
11437 if (max_external_reloc_size
!= 0)
11439 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
11440 if (flinfo
.external_relocs
== NULL
)
11444 if (max_internal_reloc_count
!= 0)
11446 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
11447 amt
*= sizeof (Elf_Internal_Rela
);
11448 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
11449 if (flinfo
.internal_relocs
== NULL
)
11453 if (max_sym_count
!= 0)
11455 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
11456 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
11457 if (flinfo
.external_syms
== NULL
)
11460 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
11461 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
11462 if (flinfo
.internal_syms
== NULL
)
11465 amt
= max_sym_count
* sizeof (long);
11466 flinfo
.indices
= (long int *) bfd_malloc (amt
);
11467 if (flinfo
.indices
== NULL
)
11470 amt
= max_sym_count
* sizeof (asection
*);
11471 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
11472 if (flinfo
.sections
== NULL
)
11476 if (max_sym_shndx_count
!= 0)
11478 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
11479 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
11480 if (flinfo
.locsym_shndx
== NULL
)
11484 if (elf_hash_table (info
)->tls_sec
)
11486 bfd_vma base
, end
= 0;
11489 for (sec
= elf_hash_table (info
)->tls_sec
;
11490 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
11493 bfd_size_type size
= sec
->size
;
11496 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
11498 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
11501 size
= ord
->offset
+ ord
->size
;
11503 end
= sec
->vma
+ size
;
11505 base
= elf_hash_table (info
)->tls_sec
->vma
;
11506 /* Only align end of TLS section if static TLS doesn't have special
11507 alignment requirements. */
11508 if (bed
->static_tls_alignment
== 1)
11509 end
= align_power (end
,
11510 elf_hash_table (info
)->tls_sec
->alignment_power
);
11511 elf_hash_table (info
)->tls_size
= end
- base
;
11514 /* Reorder SHF_LINK_ORDER sections. */
11515 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11517 if (!elf_fixup_link_order (abfd
, o
))
11521 if (!_bfd_elf_fixup_eh_frame_hdr (info
))
11524 /* Since ELF permits relocations to be against local symbols, we
11525 must have the local symbols available when we do the relocations.
11526 Since we would rather only read the local symbols once, and we
11527 would rather not keep them in memory, we handle all the
11528 relocations for a single input file at the same time.
11530 Unfortunately, there is no way to know the total number of local
11531 symbols until we have seen all of them, and the local symbol
11532 indices precede the global symbol indices. This means that when
11533 we are generating relocatable output, and we see a reloc against
11534 a global symbol, we can not know the symbol index until we have
11535 finished examining all the local symbols to see which ones we are
11536 going to output. To deal with this, we keep the relocations in
11537 memory, and don't output them until the end of the link. This is
11538 an unfortunate waste of memory, but I don't see a good way around
11539 it. Fortunately, it only happens when performing a relocatable
11540 link, which is not the common case. FIXME: If keep_memory is set
11541 we could write the relocs out and then read them again; I don't
11542 know how bad the memory loss will be. */
11544 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
11545 sub
->output_has_begun
= FALSE
;
11546 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11548 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11550 if (p
->type
== bfd_indirect_link_order
11551 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
11552 == bfd_target_elf_flavour
)
11553 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
11555 if (! sub
->output_has_begun
)
11557 if (! elf_link_input_bfd (&flinfo
, sub
))
11559 sub
->output_has_begun
= TRUE
;
11562 else if (p
->type
== bfd_section_reloc_link_order
11563 || p
->type
== bfd_symbol_reloc_link_order
)
11565 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
11570 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
11572 if (p
->type
== bfd_indirect_link_order
11573 && (bfd_get_flavour (sub
)
11574 == bfd_target_elf_flavour
)
11575 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
11576 != bed
->s
->elfclass
))
11578 const char *iclass
, *oclass
;
11580 switch (bed
->s
->elfclass
)
11582 case ELFCLASS64
: oclass
= "ELFCLASS64"; break;
11583 case ELFCLASS32
: oclass
= "ELFCLASS32"; break;
11584 case ELFCLASSNONE
: oclass
= "ELFCLASSNONE"; break;
11588 switch (elf_elfheader (sub
)->e_ident
[EI_CLASS
])
11590 case ELFCLASS64
: iclass
= "ELFCLASS64"; break;
11591 case ELFCLASS32
: iclass
= "ELFCLASS32"; break;
11592 case ELFCLASSNONE
: iclass
= "ELFCLASSNONE"; break;
11596 bfd_set_error (bfd_error_wrong_format
);
11597 (*_bfd_error_handler
)
11598 (_("%B: file class %s incompatible with %s"),
11599 sub
, iclass
, oclass
);
11608 /* Free symbol buffer if needed. */
11609 if (!info
->reduce_memory_overheads
)
11611 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
11612 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
11613 && elf_tdata (sub
)->symbuf
)
11615 free (elf_tdata (sub
)->symbuf
);
11616 elf_tdata (sub
)->symbuf
= NULL
;
11620 /* Output any global symbols that got converted to local in a
11621 version script or due to symbol visibility. We do this in a
11622 separate step since ELF requires all local symbols to appear
11623 prior to any global symbols. FIXME: We should only do this if
11624 some global symbols were, in fact, converted to become local.
11625 FIXME: Will this work correctly with the Irix 5 linker? */
11626 eoinfo
.failed
= FALSE
;
11627 eoinfo
.flinfo
= &flinfo
;
11628 eoinfo
.localsyms
= TRUE
;
11629 eoinfo
.file_sym_done
= FALSE
;
11630 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11634 /* If backend needs to output some local symbols not present in the hash
11635 table, do it now. */
11636 if (bed
->elf_backend_output_arch_local_syms
11637 && (info
->strip
!= strip_all
|| emit_relocs
))
11639 typedef int (*out_sym_func
)
11640 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11641 struct elf_link_hash_entry
*);
11643 if (! ((*bed
->elf_backend_output_arch_local_syms
)
11644 (abfd
, info
, &flinfo
,
11645 (out_sym_func
) elf_link_output_symstrtab
)))
11649 /* That wrote out all the local symbols. Finish up the symbol table
11650 with the global symbols. Even if we want to strip everything we
11651 can, we still need to deal with those global symbols that got
11652 converted to local in a version script. */
11654 /* The sh_info field records the index of the first non local symbol. */
11655 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
11658 && elf_hash_table (info
)->dynsym
!= NULL
11659 && (elf_hash_table (info
)->dynsym
->output_section
11660 != bfd_abs_section_ptr
))
11662 Elf_Internal_Sym sym
;
11663 bfd_byte
*dynsym
= elf_hash_table (info
)->dynsym
->contents
;
11664 long last_local
= 0;
11666 /* Write out the section symbols for the output sections. */
11667 if (bfd_link_pic (info
)
11668 || elf_hash_table (info
)->is_relocatable_executable
)
11674 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
11676 sym
.st_target_internal
= 0;
11678 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
11684 dynindx
= elf_section_data (s
)->dynindx
;
11687 indx
= elf_section_data (s
)->this_idx
;
11688 BFD_ASSERT (indx
> 0);
11689 sym
.st_shndx
= indx
;
11690 if (! check_dynsym (abfd
, &sym
))
11692 sym
.st_value
= s
->vma
;
11693 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
11694 if (last_local
< dynindx
)
11695 last_local
= dynindx
;
11696 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11700 /* Write out the local dynsyms. */
11701 if (elf_hash_table (info
)->dynlocal
)
11703 struct elf_link_local_dynamic_entry
*e
;
11704 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
11709 /* Copy the internal symbol and turn off visibility.
11710 Note that we saved a word of storage and overwrote
11711 the original st_name with the dynstr_index. */
11713 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
11715 s
= bfd_section_from_elf_index (e
->input_bfd
,
11720 elf_section_data (s
->output_section
)->this_idx
;
11721 if (! check_dynsym (abfd
, &sym
))
11723 sym
.st_value
= (s
->output_section
->vma
11725 + e
->isym
.st_value
);
11728 if (last_local
< e
->dynindx
)
11729 last_local
= e
->dynindx
;
11731 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
11732 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11736 elf_section_data (elf_hash_table (info
)->dynsym
->output_section
)->this_hdr
.sh_info
=
11740 /* We get the global symbols from the hash table. */
11741 eoinfo
.failed
= FALSE
;
11742 eoinfo
.localsyms
= FALSE
;
11743 eoinfo
.flinfo
= &flinfo
;
11744 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11748 /* If backend needs to output some symbols not present in the hash
11749 table, do it now. */
11750 if (bed
->elf_backend_output_arch_syms
11751 && (info
->strip
!= strip_all
|| emit_relocs
))
11753 typedef int (*out_sym_func
)
11754 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11755 struct elf_link_hash_entry
*);
11757 if (! ((*bed
->elf_backend_output_arch_syms
)
11758 (abfd
, info
, &flinfo
,
11759 (out_sym_func
) elf_link_output_symstrtab
)))
11763 /* Finalize the .strtab section. */
11764 _bfd_elf_strtab_finalize (flinfo
.symstrtab
);
11766 /* Swap out the .strtab section. */
11767 if (!elf_link_swap_symbols_out (&flinfo
))
11770 /* Now we know the size of the symtab section. */
11771 if (bfd_get_symcount (abfd
) > 0)
11773 /* Finish up and write out the symbol string table (.strtab)
11775 Elf_Internal_Shdr
*symstrtab_hdr
;
11776 file_ptr off
= symtab_hdr
->sh_offset
+ symtab_hdr
->sh_size
;
11778 symtab_shndx_hdr
= & elf_symtab_shndx_list (abfd
)->hdr
;
11779 if (symtab_shndx_hdr
!= NULL
&& symtab_shndx_hdr
->sh_name
!= 0)
11781 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
11782 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
11783 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
11784 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
11785 symtab_shndx_hdr
->sh_size
= amt
;
11787 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
11790 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
11791 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
11795 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
11796 /* sh_name was set in prep_headers. */
11797 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
11798 symstrtab_hdr
->sh_flags
= bed
->elf_strtab_flags
;
11799 symstrtab_hdr
->sh_addr
= 0;
11800 symstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (flinfo
.symstrtab
);
11801 symstrtab_hdr
->sh_entsize
= 0;
11802 symstrtab_hdr
->sh_link
= 0;
11803 symstrtab_hdr
->sh_info
= 0;
11804 /* sh_offset is set just below. */
11805 symstrtab_hdr
->sh_addralign
= 1;
11807 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
,
11809 elf_next_file_pos (abfd
) = off
;
11811 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
11812 || ! _bfd_elf_strtab_emit (abfd
, flinfo
.symstrtab
))
11816 /* Adjust the relocs to have the correct symbol indices. */
11817 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11819 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11821 if ((o
->flags
& SEC_RELOC
) == 0)
11824 sort
= bed
->sort_relocs_p
== NULL
|| (*bed
->sort_relocs_p
) (o
);
11825 if (esdo
->rel
.hdr
!= NULL
11826 && !elf_link_adjust_relocs (abfd
, &esdo
->rel
, sort
))
11828 if (esdo
->rela
.hdr
!= NULL
11829 && !elf_link_adjust_relocs (abfd
, &esdo
->rela
, sort
))
11832 /* Set the reloc_count field to 0 to prevent write_relocs from
11833 trying to swap the relocs out itself. */
11834 o
->reloc_count
= 0;
11837 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
11838 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
11840 /* If we are linking against a dynamic object, or generating a
11841 shared library, finish up the dynamic linking information. */
11844 bfd_byte
*dyncon
, *dynconend
;
11846 /* Fix up .dynamic entries. */
11847 o
= bfd_get_linker_section (dynobj
, ".dynamic");
11848 BFD_ASSERT (o
!= NULL
);
11850 dyncon
= o
->contents
;
11851 dynconend
= o
->contents
+ o
->size
;
11852 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11854 Elf_Internal_Dyn dyn
;
11858 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11865 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
11867 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
11869 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
11870 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
11873 dyn
.d_un
.d_val
= relativecount
;
11880 name
= info
->init_function
;
11883 name
= info
->fini_function
;
11886 struct elf_link_hash_entry
*h
;
11888 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
11889 FALSE
, FALSE
, TRUE
);
11891 && (h
->root
.type
== bfd_link_hash_defined
11892 || h
->root
.type
== bfd_link_hash_defweak
))
11894 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
11895 o
= h
->root
.u
.def
.section
;
11896 if (o
->output_section
!= NULL
)
11897 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
11898 + o
->output_offset
);
11901 /* The symbol is imported from another shared
11902 library and does not apply to this one. */
11903 dyn
.d_un
.d_ptr
= 0;
11910 case DT_PREINIT_ARRAYSZ
:
11911 name
= ".preinit_array";
11913 case DT_INIT_ARRAYSZ
:
11914 name
= ".init_array";
11916 case DT_FINI_ARRAYSZ
:
11917 name
= ".fini_array";
11919 o
= bfd_get_section_by_name (abfd
, name
);
11922 (*_bfd_error_handler
)
11923 (_("could not find section %s"), name
);
11927 (*_bfd_error_handler
)
11928 (_("warning: %s section has zero size"), name
);
11929 dyn
.d_un
.d_val
= o
->size
;
11932 case DT_PREINIT_ARRAY
:
11933 name
= ".preinit_array";
11935 case DT_INIT_ARRAY
:
11936 name
= ".init_array";
11938 case DT_FINI_ARRAY
:
11939 name
= ".fini_array";
11941 o
= bfd_get_section_by_name (abfd
, name
);
11948 name
= ".gnu.hash";
11957 name
= ".gnu.version_d";
11960 name
= ".gnu.version_r";
11963 name
= ".gnu.version";
11965 o
= bfd_get_linker_section (dynobj
, name
);
11969 (*_bfd_error_handler
)
11970 (_("could not find section %s"), name
);
11973 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
11975 (*_bfd_error_handler
)
11976 (_("warning: section '%s' is being made into a note"), name
);
11977 bfd_set_error (bfd_error_nonrepresentable_section
);
11980 dyn
.d_un
.d_ptr
= o
->output_section
->vma
+ o
->output_offset
;
11987 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
11991 dyn
.d_un
.d_val
= 0;
11992 dyn
.d_un
.d_ptr
= 0;
11993 for (i
= 1; i
< elf_numsections (abfd
); i
++)
11995 Elf_Internal_Shdr
*hdr
;
11997 hdr
= elf_elfsections (abfd
)[i
];
11998 if (hdr
->sh_type
== type
11999 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
12001 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
12002 dyn
.d_un
.d_val
+= hdr
->sh_size
;
12005 if (dyn
.d_un
.d_ptr
== 0
12006 || hdr
->sh_addr
< dyn
.d_un
.d_ptr
)
12007 dyn
.d_un
.d_ptr
= hdr
->sh_addr
;
12013 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
12017 /* If we have created any dynamic sections, then output them. */
12018 if (dynobj
!= NULL
)
12020 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
12023 /* Check for DT_TEXTREL (late, in case the backend removes it). */
12024 if (((info
->warn_shared_textrel
&& bfd_link_pic (info
))
12025 || info
->error_textrel
)
12026 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
12028 bfd_byte
*dyncon
, *dynconend
;
12030 dyncon
= o
->contents
;
12031 dynconend
= o
->contents
+ o
->size
;
12032 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
12034 Elf_Internal_Dyn dyn
;
12036 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
12038 if (dyn
.d_tag
== DT_TEXTREL
)
12040 if (info
->error_textrel
)
12041 info
->callbacks
->einfo
12042 (_("%P%X: read-only segment has dynamic relocations.\n"));
12044 info
->callbacks
->einfo
12045 (_("%P: warning: creating a DT_TEXTREL in a shared object.\n"));
12051 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
12053 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
12055 || o
->output_section
== bfd_abs_section_ptr
)
12057 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
12059 /* At this point, we are only interested in sections
12060 created by _bfd_elf_link_create_dynamic_sections. */
12063 if (elf_hash_table (info
)->stab_info
.stabstr
== o
)
12065 if (elf_hash_table (info
)->eh_info
.hdr_sec
== o
)
12067 if (strcmp (o
->name
, ".dynstr") != 0)
12069 if (! bfd_set_section_contents (abfd
, o
->output_section
,
12071 (file_ptr
) o
->output_offset
12072 * bfd_octets_per_byte (abfd
),
12078 /* The contents of the .dynstr section are actually in a
12082 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
12083 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
12084 || ! _bfd_elf_strtab_emit (abfd
,
12085 elf_hash_table (info
)->dynstr
))
12091 if (bfd_link_relocatable (info
))
12093 bfd_boolean failed
= FALSE
;
12095 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
12100 /* If we have optimized stabs strings, output them. */
12101 if (elf_hash_table (info
)->stab_info
.stabstr
!= NULL
)
12103 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
12107 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
12110 elf_final_link_free (abfd
, &flinfo
);
12112 elf_linker (abfd
) = TRUE
;
12116 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
12117 if (contents
== NULL
)
12118 return FALSE
; /* Bail out and fail. */
12119 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
12120 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
12127 elf_final_link_free (abfd
, &flinfo
);
12131 /* Initialize COOKIE for input bfd ABFD. */
12134 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
12135 struct bfd_link_info
*info
, bfd
*abfd
)
12137 Elf_Internal_Shdr
*symtab_hdr
;
12138 const struct elf_backend_data
*bed
;
12140 bed
= get_elf_backend_data (abfd
);
12141 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12143 cookie
->abfd
= abfd
;
12144 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
12145 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
12146 if (cookie
->bad_symtab
)
12148 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
12149 cookie
->extsymoff
= 0;
12153 cookie
->locsymcount
= symtab_hdr
->sh_info
;
12154 cookie
->extsymoff
= symtab_hdr
->sh_info
;
12157 if (bed
->s
->arch_size
== 32)
12158 cookie
->r_sym_shift
= 8;
12160 cookie
->r_sym_shift
= 32;
12162 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
12163 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
12165 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
12166 cookie
->locsymcount
, 0,
12168 if (cookie
->locsyms
== NULL
)
12170 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
12173 if (info
->keep_memory
)
12174 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
12179 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
12182 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
12184 Elf_Internal_Shdr
*symtab_hdr
;
12186 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12187 if (cookie
->locsyms
!= NULL
12188 && symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
12189 free (cookie
->locsyms
);
12192 /* Initialize the relocation information in COOKIE for input section SEC
12193 of input bfd ABFD. */
12196 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
12197 struct bfd_link_info
*info
, bfd
*abfd
,
12200 const struct elf_backend_data
*bed
;
12202 if (sec
->reloc_count
== 0)
12204 cookie
->rels
= NULL
;
12205 cookie
->relend
= NULL
;
12209 bed
= get_elf_backend_data (abfd
);
12211 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
12212 info
->keep_memory
);
12213 if (cookie
->rels
== NULL
)
12215 cookie
->rel
= cookie
->rels
;
12216 cookie
->relend
= (cookie
->rels
12217 + sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
);
12219 cookie
->rel
= cookie
->rels
;
12223 /* Free the memory allocated by init_reloc_cookie_rels,
12227 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
12230 if (cookie
->rels
&& elf_section_data (sec
)->relocs
!= cookie
->rels
)
12231 free (cookie
->rels
);
12234 /* Initialize the whole of COOKIE for input section SEC. */
12237 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
12238 struct bfd_link_info
*info
,
12241 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
12243 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
12248 fini_reloc_cookie (cookie
, sec
->owner
);
12253 /* Free the memory allocated by init_reloc_cookie_for_section,
12257 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
12260 fini_reloc_cookie_rels (cookie
, sec
);
12261 fini_reloc_cookie (cookie
, sec
->owner
);
12264 /* Garbage collect unused sections. */
12266 /* Default gc_mark_hook. */
12269 _bfd_elf_gc_mark_hook (asection
*sec
,
12270 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12271 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
12272 struct elf_link_hash_entry
*h
,
12273 Elf_Internal_Sym
*sym
)
12277 switch (h
->root
.type
)
12279 case bfd_link_hash_defined
:
12280 case bfd_link_hash_defweak
:
12281 return h
->root
.u
.def
.section
;
12283 case bfd_link_hash_common
:
12284 return h
->root
.u
.c
.p
->section
;
12291 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
12296 /* For undefined __start_<name> and __stop_<name> symbols, return the
12297 first input section matching <name>. Return NULL otherwise. */
12300 _bfd_elf_is_start_stop (const struct bfd_link_info
*info
,
12301 struct elf_link_hash_entry
*h
)
12304 const char *sec_name
;
12306 if (h
->root
.type
!= bfd_link_hash_undefined
12307 && h
->root
.type
!= bfd_link_hash_undefweak
)
12310 s
= h
->root
.u
.undef
.section
;
12313 if (s
== (asection
*) 0 - 1)
12319 if (strncmp (h
->root
.root
.string
, "__start_", 8) == 0)
12320 sec_name
= h
->root
.root
.string
+ 8;
12321 else if (strncmp (h
->root
.root
.string
, "__stop_", 7) == 0)
12322 sec_name
= h
->root
.root
.string
+ 7;
12324 if (sec_name
!= NULL
&& *sec_name
!= '\0')
12328 for (i
= info
->input_bfds
; i
!= NULL
; i
= i
->link
.next
)
12330 s
= bfd_get_section_by_name (i
, sec_name
);
12333 h
->root
.u
.undef
.section
= s
;
12340 h
->root
.u
.undef
.section
= (asection
*) 0 - 1;
12345 /* COOKIE->rel describes a relocation against section SEC, which is
12346 a section we've decided to keep. Return the section that contains
12347 the relocation symbol, or NULL if no section contains it. */
12350 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
12351 elf_gc_mark_hook_fn gc_mark_hook
,
12352 struct elf_reloc_cookie
*cookie
,
12353 bfd_boolean
*start_stop
)
12355 unsigned long r_symndx
;
12356 struct elf_link_hash_entry
*h
;
12358 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
12359 if (r_symndx
== STN_UNDEF
)
12362 if (r_symndx
>= cookie
->locsymcount
12363 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
12365 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
12368 info
->callbacks
->einfo (_("%F%P: corrupt input: %B\n"),
12372 while (h
->root
.type
== bfd_link_hash_indirect
12373 || h
->root
.type
== bfd_link_hash_warning
)
12374 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12376 /* If this symbol is weak and there is a non-weak definition, we
12377 keep the non-weak definition because many backends put
12378 dynamic reloc info on the non-weak definition for code
12379 handling copy relocs. */
12380 if (h
->u
.weakdef
!= NULL
)
12381 h
->u
.weakdef
->mark
= 1;
12383 if (start_stop
!= NULL
)
12385 /* To work around a glibc bug, mark all XXX input sections
12386 when there is an as yet undefined reference to __start_XXX
12387 or __stop_XXX symbols. The linker will later define such
12388 symbols for orphan input sections that have a name
12389 representable as a C identifier. */
12390 asection
*s
= _bfd_elf_is_start_stop (info
, h
);
12394 *start_stop
= !s
->gc_mark
;
12399 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
12402 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
12403 &cookie
->locsyms
[r_symndx
]);
12406 /* COOKIE->rel describes a relocation against section SEC, which is
12407 a section we've decided to keep. Mark the section that contains
12408 the relocation symbol. */
12411 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
12413 elf_gc_mark_hook_fn gc_mark_hook
,
12414 struct elf_reloc_cookie
*cookie
)
12417 bfd_boolean start_stop
= FALSE
;
12419 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
, &start_stop
);
12420 while (rsec
!= NULL
)
12422 if (!rsec
->gc_mark
)
12424 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
12425 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
12427 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
12432 rsec
= bfd_get_next_section_by_name (rsec
->owner
, rsec
);
12437 /* The mark phase of garbage collection. For a given section, mark
12438 it and any sections in this section's group, and all the sections
12439 which define symbols to which it refers. */
12442 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
12444 elf_gc_mark_hook_fn gc_mark_hook
)
12447 asection
*group_sec
, *eh_frame
;
12451 /* Mark all the sections in the group. */
12452 group_sec
= elf_section_data (sec
)->next_in_group
;
12453 if (group_sec
&& !group_sec
->gc_mark
)
12454 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
12457 /* Look through the section relocs. */
12459 eh_frame
= elf_eh_frame_section (sec
->owner
);
12460 if ((sec
->flags
& SEC_RELOC
) != 0
12461 && sec
->reloc_count
> 0
12462 && sec
!= eh_frame
)
12464 struct elf_reloc_cookie cookie
;
12466 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
12470 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
12471 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
12476 fini_reloc_cookie_for_section (&cookie
, sec
);
12480 if (ret
&& eh_frame
&& elf_fde_list (sec
))
12482 struct elf_reloc_cookie cookie
;
12484 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
12488 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
12489 gc_mark_hook
, &cookie
))
12491 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
12495 eh_frame
= elf_section_eh_frame_entry (sec
);
12496 if (ret
&& eh_frame
&& !eh_frame
->gc_mark
)
12497 if (!_bfd_elf_gc_mark (info
, eh_frame
, gc_mark_hook
))
12503 /* Scan and mark sections in a special or debug section group. */
12506 _bfd_elf_gc_mark_debug_special_section_group (asection
*grp
)
12508 /* Point to first section of section group. */
12510 /* Used to iterate the section group. */
12513 bfd_boolean is_special_grp
= TRUE
;
12514 bfd_boolean is_debug_grp
= TRUE
;
12516 /* First scan to see if group contains any section other than debug
12517 and special section. */
12518 ssec
= msec
= elf_next_in_group (grp
);
12521 if ((msec
->flags
& SEC_DEBUGGING
) == 0)
12522 is_debug_grp
= FALSE
;
12524 if ((msec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) != 0)
12525 is_special_grp
= FALSE
;
12527 msec
= elf_next_in_group (msec
);
12529 while (msec
!= ssec
);
12531 /* If this is a pure debug section group or pure special section group,
12532 keep all sections in this group. */
12533 if (is_debug_grp
|| is_special_grp
)
12538 msec
= elf_next_in_group (msec
);
12540 while (msec
!= ssec
);
12544 /* Keep debug and special sections. */
12547 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
12548 elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED
)
12552 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
12555 bfd_boolean some_kept
;
12556 bfd_boolean debug_frag_seen
;
12558 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
12561 /* Ensure all linker created sections are kept,
12562 see if any other section is already marked,
12563 and note if we have any fragmented debug sections. */
12564 debug_frag_seen
= some_kept
= FALSE
;
12565 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
12567 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
12569 else if (isec
->gc_mark
)
12572 if (debug_frag_seen
== FALSE
12573 && (isec
->flags
& SEC_DEBUGGING
)
12574 && CONST_STRNEQ (isec
->name
, ".debug_line."))
12575 debug_frag_seen
= TRUE
;
12578 /* If no section in this file will be kept, then we can
12579 toss out the debug and special sections. */
12583 /* Keep debug and special sections like .comment when they are
12584 not part of a group. Also keep section groups that contain
12585 just debug sections or special sections. */
12586 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
12588 if ((isec
->flags
& SEC_GROUP
) != 0)
12589 _bfd_elf_gc_mark_debug_special_section_group (isec
);
12590 else if (((isec
->flags
& SEC_DEBUGGING
) != 0
12591 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0)
12592 && elf_next_in_group (isec
) == NULL
)
12596 if (! debug_frag_seen
)
12599 /* Look for CODE sections which are going to be discarded,
12600 and find and discard any fragmented debug sections which
12601 are associated with that code section. */
12602 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
12603 if ((isec
->flags
& SEC_CODE
) != 0
12604 && isec
->gc_mark
== 0)
12609 ilen
= strlen (isec
->name
);
12611 /* Association is determined by the name of the debug section
12612 containing the name of the code section as a suffix. For
12613 example .debug_line.text.foo is a debug section associated
12615 for (dsec
= ibfd
->sections
; dsec
!= NULL
; dsec
= dsec
->next
)
12619 if (dsec
->gc_mark
== 0
12620 || (dsec
->flags
& SEC_DEBUGGING
) == 0)
12623 dlen
= strlen (dsec
->name
);
12626 && strncmp (dsec
->name
+ (dlen
- ilen
),
12627 isec
->name
, ilen
) == 0)
12637 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
12639 struct elf_gc_sweep_symbol_info
12641 struct bfd_link_info
*info
;
12642 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
12647 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
12650 && (((h
->root
.type
== bfd_link_hash_defined
12651 || h
->root
.type
== bfd_link_hash_defweak
)
12652 && !((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
12653 && h
->root
.u
.def
.section
->gc_mark
))
12654 || h
->root
.type
== bfd_link_hash_undefined
12655 || h
->root
.type
== bfd_link_hash_undefweak
))
12657 struct elf_gc_sweep_symbol_info
*inf
;
12659 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
12660 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
12661 h
->def_regular
= 0;
12662 h
->ref_regular
= 0;
12663 h
->ref_regular_nonweak
= 0;
12669 /* The sweep phase of garbage collection. Remove all garbage sections. */
12671 typedef bfd_boolean (*gc_sweep_hook_fn
)
12672 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
12675 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
12678 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12679 gc_sweep_hook_fn gc_sweep_hook
= bed
->gc_sweep_hook
;
12680 unsigned long section_sym_count
;
12681 struct elf_gc_sweep_symbol_info sweep_info
;
12683 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
12687 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
12688 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
12691 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12693 /* When any section in a section group is kept, we keep all
12694 sections in the section group. If the first member of
12695 the section group is excluded, we will also exclude the
12697 if (o
->flags
& SEC_GROUP
)
12699 asection
*first
= elf_next_in_group (o
);
12700 o
->gc_mark
= first
->gc_mark
;
12706 /* Skip sweeping sections already excluded. */
12707 if (o
->flags
& SEC_EXCLUDE
)
12710 /* Since this is early in the link process, it is simple
12711 to remove a section from the output. */
12712 o
->flags
|= SEC_EXCLUDE
;
12714 if (info
->print_gc_sections
&& o
->size
!= 0)
12715 _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub
, o
->name
);
12717 /* But we also have to update some of the relocation
12718 info we collected before. */
12720 && (o
->flags
& SEC_RELOC
) != 0
12721 && o
->reloc_count
!= 0
12722 && !((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
12723 && (o
->flags
& SEC_DEBUGGING
) != 0)
12724 && !bfd_is_abs_section (o
->output_section
))
12726 Elf_Internal_Rela
*internal_relocs
;
12730 = _bfd_elf_link_read_relocs (o
->owner
, o
, NULL
, NULL
,
12731 info
->keep_memory
);
12732 if (internal_relocs
== NULL
)
12735 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
12737 if (elf_section_data (o
)->relocs
!= internal_relocs
)
12738 free (internal_relocs
);
12746 /* Remove the symbols that were in the swept sections from the dynamic
12747 symbol table. GCFIXME: Anyone know how to get them out of the
12748 static symbol table as well? */
12749 sweep_info
.info
= info
;
12750 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
12751 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
12754 _bfd_elf_link_renumber_dynsyms (abfd
, info
, §ion_sym_count
);
12758 /* Propagate collected vtable information. This is called through
12759 elf_link_hash_traverse. */
12762 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
12764 /* Those that are not vtables. */
12765 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12768 /* Those vtables that do not have parents, we cannot merge. */
12769 if (h
->vtable
->parent
== (struct elf_link_hash_entry
*) -1)
12772 /* If we've already been done, exit. */
12773 if (h
->vtable
->used
&& h
->vtable
->used
[-1])
12776 /* Make sure the parent's table is up to date. */
12777 elf_gc_propagate_vtable_entries_used (h
->vtable
->parent
, okp
);
12779 if (h
->vtable
->used
== NULL
)
12781 /* None of this table's entries were referenced. Re-use the
12783 h
->vtable
->used
= h
->vtable
->parent
->vtable
->used
;
12784 h
->vtable
->size
= h
->vtable
->parent
->vtable
->size
;
12789 bfd_boolean
*cu
, *pu
;
12791 /* Or the parent's entries into ours. */
12792 cu
= h
->vtable
->used
;
12794 pu
= h
->vtable
->parent
->vtable
->used
;
12797 const struct elf_backend_data
*bed
;
12798 unsigned int log_file_align
;
12800 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
12801 log_file_align
= bed
->s
->log_file_align
;
12802 n
= h
->vtable
->parent
->vtable
->size
>> log_file_align
;
12817 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
12820 bfd_vma hstart
, hend
;
12821 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
12822 const struct elf_backend_data
*bed
;
12823 unsigned int log_file_align
;
12825 /* Take care of both those symbols that do not describe vtables as
12826 well as those that are not loaded. */
12827 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12830 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
12831 || h
->root
.type
== bfd_link_hash_defweak
);
12833 sec
= h
->root
.u
.def
.section
;
12834 hstart
= h
->root
.u
.def
.value
;
12835 hend
= hstart
+ h
->size
;
12837 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
12839 return *(bfd_boolean
*) okp
= FALSE
;
12840 bed
= get_elf_backend_data (sec
->owner
);
12841 log_file_align
= bed
->s
->log_file_align
;
12843 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
12845 for (rel
= relstart
; rel
< relend
; ++rel
)
12846 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
12848 /* If the entry is in use, do nothing. */
12849 if (h
->vtable
->used
12850 && (rel
->r_offset
- hstart
) < h
->vtable
->size
)
12852 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
12853 if (h
->vtable
->used
[entry
])
12856 /* Otherwise, kill it. */
12857 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
12863 /* Mark sections containing dynamically referenced symbols. When
12864 building shared libraries, we must assume that any visible symbol is
12868 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
12870 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
12871 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
12873 if ((h
->root
.type
== bfd_link_hash_defined
12874 || h
->root
.type
== bfd_link_hash_defweak
)
12876 || ((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
12877 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
12878 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
12879 && (!bfd_link_executable (info
)
12880 || info
->export_dynamic
12883 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
12884 && (h
->versioned
>= versioned
12885 || !bfd_hide_sym_by_version (info
->version_info
,
12886 h
->root
.root
.string
)))))
12887 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12892 /* Keep all sections containing symbols undefined on the command-line,
12893 and the section containing the entry symbol. */
12896 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
12898 struct bfd_sym_chain
*sym
;
12900 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
12902 struct elf_link_hash_entry
*h
;
12904 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
12905 FALSE
, FALSE
, FALSE
);
12908 && (h
->root
.type
== bfd_link_hash_defined
12909 || h
->root
.type
== bfd_link_hash_defweak
)
12910 && !bfd_is_abs_section (h
->root
.u
.def
.section
))
12911 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12916 bfd_elf_parse_eh_frame_entries (bfd
*abfd ATTRIBUTE_UNUSED
,
12917 struct bfd_link_info
*info
)
12919 bfd
*ibfd
= info
->input_bfds
;
12921 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
12924 struct elf_reloc_cookie cookie
;
12926 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
12929 if (!init_reloc_cookie (&cookie
, info
, ibfd
))
12932 for (sec
= ibfd
->sections
; sec
; sec
= sec
->next
)
12934 if (CONST_STRNEQ (bfd_section_name (ibfd
, sec
), ".eh_frame_entry")
12935 && init_reloc_cookie_rels (&cookie
, info
, ibfd
, sec
))
12937 _bfd_elf_parse_eh_frame_entry (info
, sec
, &cookie
);
12938 fini_reloc_cookie_rels (&cookie
, sec
);
12945 /* Do mark and sweep of unused sections. */
12948 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
12950 bfd_boolean ok
= TRUE
;
12952 elf_gc_mark_hook_fn gc_mark_hook
;
12953 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12954 struct elf_link_hash_table
*htab
;
12956 if (!bed
->can_gc_sections
12957 || !is_elf_hash_table (info
->hash
))
12959 (*_bfd_error_handler
)(_("Warning: gc-sections option ignored"));
12963 bed
->gc_keep (info
);
12964 htab
= elf_hash_table (info
);
12966 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
12967 at the .eh_frame section if we can mark the FDEs individually. */
12968 for (sub
= info
->input_bfds
;
12969 info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
&& sub
!= NULL
;
12970 sub
= sub
->link
.next
)
12973 struct elf_reloc_cookie cookie
;
12975 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
12976 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
12978 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
12979 if (elf_section_data (sec
)->sec_info
12980 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
12981 elf_eh_frame_section (sub
) = sec
;
12982 fini_reloc_cookie_for_section (&cookie
, sec
);
12983 sec
= bfd_get_next_section_by_name (NULL
, sec
);
12987 /* Apply transitive closure to the vtable entry usage info. */
12988 elf_link_hash_traverse (htab
, elf_gc_propagate_vtable_entries_used
, &ok
);
12992 /* Kill the vtable relocations that were not used. */
12993 elf_link_hash_traverse (htab
, elf_gc_smash_unused_vtentry_relocs
, &ok
);
12997 /* Mark dynamically referenced symbols. */
12998 if (htab
->dynamic_sections_created
)
12999 elf_link_hash_traverse (htab
, bed
->gc_mark_dynamic_ref
, info
);
13001 /* Grovel through relocs to find out who stays ... */
13002 gc_mark_hook
= bed
->gc_mark_hook
;
13003 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
13007 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
13008 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
13011 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
13012 Also treat note sections as a root, if the section is not part
13014 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
13016 && (o
->flags
& SEC_EXCLUDE
) == 0
13017 && ((o
->flags
& SEC_KEEP
) != 0
13018 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
13019 && elf_next_in_group (o
) == NULL
)))
13021 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
13026 /* Allow the backend to mark additional target specific sections. */
13027 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
13029 /* ... and mark SEC_EXCLUDE for those that go. */
13030 return elf_gc_sweep (abfd
, info
);
13033 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
13036 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
13038 struct elf_link_hash_entry
*h
,
13041 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
13042 struct elf_link_hash_entry
**search
, *child
;
13043 bfd_size_type extsymcount
;
13044 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13046 /* The sh_info field of the symtab header tells us where the
13047 external symbols start. We don't care about the local symbols at
13049 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
13050 if (!elf_bad_symtab (abfd
))
13051 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
13053 sym_hashes
= elf_sym_hashes (abfd
);
13054 sym_hashes_end
= sym_hashes
+ extsymcount
;
13056 /* Hunt down the child symbol, which is in this section at the same
13057 offset as the relocation. */
13058 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
13060 if ((child
= *search
) != NULL
13061 && (child
->root
.type
== bfd_link_hash_defined
13062 || child
->root
.type
== bfd_link_hash_defweak
)
13063 && child
->root
.u
.def
.section
== sec
13064 && child
->root
.u
.def
.value
== offset
)
13068 (*_bfd_error_handler
) ("%B: %A+%lu: No symbol found for INHERIT",
13069 abfd
, sec
, (unsigned long) offset
);
13070 bfd_set_error (bfd_error_invalid_operation
);
13074 if (!child
->vtable
)
13076 child
->vtable
= ((struct elf_link_virtual_table_entry
*)
13077 bfd_zalloc (abfd
, sizeof (*child
->vtable
)));
13078 if (!child
->vtable
)
13083 /* This *should* only be the absolute section. It could potentially
13084 be that someone has defined a non-global vtable though, which
13085 would be bad. It isn't worth paging in the local symbols to be
13086 sure though; that case should simply be handled by the assembler. */
13088 child
->vtable
->parent
= (struct elf_link_hash_entry
*) -1;
13091 child
->vtable
->parent
= h
;
13096 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
13099 bfd_elf_gc_record_vtentry (bfd
*abfd ATTRIBUTE_UNUSED
,
13100 asection
*sec ATTRIBUTE_UNUSED
,
13101 struct elf_link_hash_entry
*h
,
13104 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13105 unsigned int log_file_align
= bed
->s
->log_file_align
;
13109 h
->vtable
= ((struct elf_link_virtual_table_entry
*)
13110 bfd_zalloc (abfd
, sizeof (*h
->vtable
)));
13115 if (addend
>= h
->vtable
->size
)
13117 size_t size
, bytes
, file_align
;
13118 bfd_boolean
*ptr
= h
->vtable
->used
;
13120 /* While the symbol is undefined, we have to be prepared to handle
13122 file_align
= 1 << log_file_align
;
13123 if (h
->root
.type
== bfd_link_hash_undefined
)
13124 size
= addend
+ file_align
;
13128 if (addend
>= size
)
13130 /* Oops! We've got a reference past the defined end of
13131 the table. This is probably a bug -- shall we warn? */
13132 size
= addend
+ file_align
;
13135 size
= (size
+ file_align
- 1) & -file_align
;
13137 /* Allocate one extra entry for use as a "done" flag for the
13138 consolidation pass. */
13139 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
13143 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
13149 oldbytes
= (((h
->vtable
->size
>> log_file_align
) + 1)
13150 * sizeof (bfd_boolean
));
13151 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
13155 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
13160 /* And arrange for that done flag to be at index -1. */
13161 h
->vtable
->used
= ptr
+ 1;
13162 h
->vtable
->size
= size
;
13165 h
->vtable
->used
[addend
>> log_file_align
] = TRUE
;
13170 /* Map an ELF section header flag to its corresponding string. */
13174 flagword flag_value
;
13175 } elf_flags_to_name_table
;
13177 static elf_flags_to_name_table elf_flags_to_names
[] =
13179 { "SHF_WRITE", SHF_WRITE
},
13180 { "SHF_ALLOC", SHF_ALLOC
},
13181 { "SHF_EXECINSTR", SHF_EXECINSTR
},
13182 { "SHF_MERGE", SHF_MERGE
},
13183 { "SHF_STRINGS", SHF_STRINGS
},
13184 { "SHF_INFO_LINK", SHF_INFO_LINK
},
13185 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
13186 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
13187 { "SHF_GROUP", SHF_GROUP
},
13188 { "SHF_TLS", SHF_TLS
},
13189 { "SHF_MASKOS", SHF_MASKOS
},
13190 { "SHF_EXCLUDE", SHF_EXCLUDE
},
13193 /* Returns TRUE if the section is to be included, otherwise FALSE. */
13195 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
13196 struct flag_info
*flaginfo
,
13199 const bfd_vma sh_flags
= elf_section_flags (section
);
13201 if (!flaginfo
->flags_initialized
)
13203 bfd
*obfd
= info
->output_bfd
;
13204 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
13205 struct flag_info_list
*tf
= flaginfo
->flag_list
;
13207 int without_hex
= 0;
13209 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
13212 flagword (*lookup
) (char *);
13214 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
13215 if (lookup
!= NULL
)
13217 flagword hexval
= (*lookup
) ((char *) tf
->name
);
13221 if (tf
->with
== with_flags
)
13222 with_hex
|= hexval
;
13223 else if (tf
->with
== without_flags
)
13224 without_hex
|= hexval
;
13229 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
13231 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
13233 if (tf
->with
== with_flags
)
13234 with_hex
|= elf_flags_to_names
[i
].flag_value
;
13235 else if (tf
->with
== without_flags
)
13236 without_hex
|= elf_flags_to_names
[i
].flag_value
;
13243 info
->callbacks
->einfo
13244 (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
13248 flaginfo
->flags_initialized
= TRUE
;
13249 flaginfo
->only_with_flags
|= with_hex
;
13250 flaginfo
->not_with_flags
|= without_hex
;
13253 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
13256 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
13262 struct alloc_got_off_arg
{
13264 struct bfd_link_info
*info
;
13267 /* We need a special top-level link routine to convert got reference counts
13268 to real got offsets. */
13271 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
13273 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
13274 bfd
*obfd
= gofarg
->info
->output_bfd
;
13275 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
13277 if (h
->got
.refcount
> 0)
13279 h
->got
.offset
= gofarg
->gotoff
;
13280 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
13283 h
->got
.offset
= (bfd_vma
) -1;
13288 /* And an accompanying bit to work out final got entry offsets once
13289 we're done. Should be called from final_link. */
13292 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
13293 struct bfd_link_info
*info
)
13296 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13298 struct alloc_got_off_arg gofarg
;
13300 BFD_ASSERT (abfd
== info
->output_bfd
);
13302 if (! is_elf_hash_table (info
->hash
))
13305 /* The GOT offset is relative to the .got section, but the GOT header is
13306 put into the .got.plt section, if the backend uses it. */
13307 if (bed
->want_got_plt
)
13310 gotoff
= bed
->got_header_size
;
13312 /* Do the local .got entries first. */
13313 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
13315 bfd_signed_vma
*local_got
;
13316 bfd_size_type j
, locsymcount
;
13317 Elf_Internal_Shdr
*symtab_hdr
;
13319 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
13322 local_got
= elf_local_got_refcounts (i
);
13326 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
13327 if (elf_bad_symtab (i
))
13328 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
13330 locsymcount
= symtab_hdr
->sh_info
;
13332 for (j
= 0; j
< locsymcount
; ++j
)
13334 if (local_got
[j
] > 0)
13336 local_got
[j
] = gotoff
;
13337 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
13340 local_got
[j
] = (bfd_vma
) -1;
13344 /* Then the global .got entries. .plt refcounts are handled by
13345 adjust_dynamic_symbol */
13346 gofarg
.gotoff
= gotoff
;
13347 gofarg
.info
= info
;
13348 elf_link_hash_traverse (elf_hash_table (info
),
13349 elf_gc_allocate_got_offsets
,
13354 /* Many folk need no more in the way of final link than this, once
13355 got entry reference counting is enabled. */
13358 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
13360 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
13363 /* Invoke the regular ELF backend linker to do all the work. */
13364 return bfd_elf_final_link (abfd
, info
);
13368 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
13370 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
13372 if (rcookie
->bad_symtab
)
13373 rcookie
->rel
= rcookie
->rels
;
13375 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
13377 unsigned long r_symndx
;
13379 if (! rcookie
->bad_symtab
)
13380 if (rcookie
->rel
->r_offset
> offset
)
13382 if (rcookie
->rel
->r_offset
!= offset
)
13385 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
13386 if (r_symndx
== STN_UNDEF
)
13389 if (r_symndx
>= rcookie
->locsymcount
13390 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
13392 struct elf_link_hash_entry
*h
;
13394 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
13396 while (h
->root
.type
== bfd_link_hash_indirect
13397 || h
->root
.type
== bfd_link_hash_warning
)
13398 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
13400 if ((h
->root
.type
== bfd_link_hash_defined
13401 || h
->root
.type
== bfd_link_hash_defweak
)
13402 && (h
->root
.u
.def
.section
->owner
!= rcookie
->abfd
13403 || h
->root
.u
.def
.section
->kept_section
!= NULL
13404 || discarded_section (h
->root
.u
.def
.section
)))
13409 /* It's not a relocation against a global symbol,
13410 but it could be a relocation against a local
13411 symbol for a discarded section. */
13413 Elf_Internal_Sym
*isym
;
13415 /* Need to: get the symbol; get the section. */
13416 isym
= &rcookie
->locsyms
[r_symndx
];
13417 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
13419 && (isec
->kept_section
!= NULL
13420 || discarded_section (isec
)))
13428 /* Discard unneeded references to discarded sections.
13429 Returns -1 on error, 1 if any section's size was changed, 0 if
13430 nothing changed. This function assumes that the relocations are in
13431 sorted order, which is true for all known assemblers. */
13434 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
13436 struct elf_reloc_cookie cookie
;
13441 if (info
->traditional_format
13442 || !is_elf_hash_table (info
->hash
))
13445 o
= bfd_get_section_by_name (output_bfd
, ".stab");
13450 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
13453 || i
->reloc_count
== 0
13454 || i
->sec_info_type
!= SEC_INFO_TYPE_STABS
)
13458 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
13461 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
13464 if (_bfd_discard_section_stabs (abfd
, i
,
13465 elf_section_data (i
)->sec_info
,
13466 bfd_elf_reloc_symbol_deleted_p
,
13470 fini_reloc_cookie_for_section (&cookie
, i
);
13475 if (info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
)
13476 o
= bfd_get_section_by_name (output_bfd
, ".eh_frame");
13481 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
13487 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
13490 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
13493 _bfd_elf_parse_eh_frame (abfd
, info
, i
, &cookie
);
13494 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, i
,
13495 bfd_elf_reloc_symbol_deleted_p
,
13499 fini_reloc_cookie_for_section (&cookie
, i
);
13503 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link
.next
)
13505 const struct elf_backend_data
*bed
;
13507 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
13510 bed
= get_elf_backend_data (abfd
);
13512 if (bed
->elf_backend_discard_info
!= NULL
)
13514 if (!init_reloc_cookie (&cookie
, info
, abfd
))
13517 if ((*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
13520 fini_reloc_cookie (&cookie
, abfd
);
13524 if (info
->eh_frame_hdr_type
== COMPACT_EH_HDR
)
13525 _bfd_elf_end_eh_frame_parsing (info
);
13527 if (info
->eh_frame_hdr_type
13528 && !bfd_link_relocatable (info
)
13529 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
13536 _bfd_elf_section_already_linked (bfd
*abfd
,
13538 struct bfd_link_info
*info
)
13541 const char *name
, *key
;
13542 struct bfd_section_already_linked
*l
;
13543 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
13545 if (sec
->output_section
== bfd_abs_section_ptr
)
13548 flags
= sec
->flags
;
13550 /* Return if it isn't a linkonce section. A comdat group section
13551 also has SEC_LINK_ONCE set. */
13552 if ((flags
& SEC_LINK_ONCE
) == 0)
13555 /* Don't put group member sections on our list of already linked
13556 sections. They are handled as a group via their group section. */
13557 if (elf_sec_group (sec
) != NULL
)
13560 /* For a SHT_GROUP section, use the group signature as the key. */
13562 if ((flags
& SEC_GROUP
) != 0
13563 && elf_next_in_group (sec
) != NULL
13564 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
13565 key
= elf_group_name (elf_next_in_group (sec
));
13568 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
13569 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
13570 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
13573 /* Must be a user linkonce section that doesn't follow gcc's
13574 naming convention. In this case we won't be matching
13575 single member groups. */
13579 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
13581 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
13583 /* We may have 2 different types of sections on the list: group
13584 sections with a signature of <key> (<key> is some string),
13585 and linkonce sections named .gnu.linkonce.<type>.<key>.
13586 Match like sections. LTO plugin sections are an exception.
13587 They are always named .gnu.linkonce.t.<key> and match either
13588 type of section. */
13589 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
13590 && ((flags
& SEC_GROUP
) != 0
13591 || strcmp (name
, l
->sec
->name
) == 0))
13592 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0)
13594 /* The section has already been linked. See if we should
13595 issue a warning. */
13596 if (!_bfd_handle_already_linked (sec
, l
, info
))
13599 if (flags
& SEC_GROUP
)
13601 asection
*first
= elf_next_in_group (sec
);
13602 asection
*s
= first
;
13606 s
->output_section
= bfd_abs_section_ptr
;
13607 /* Record which group discards it. */
13608 s
->kept_section
= l
->sec
;
13609 s
= elf_next_in_group (s
);
13610 /* These lists are circular. */
13620 /* A single member comdat group section may be discarded by a
13621 linkonce section and vice versa. */
13622 if ((flags
& SEC_GROUP
) != 0)
13624 asection
*first
= elf_next_in_group (sec
);
13626 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
13627 /* Check this single member group against linkonce sections. */
13628 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
13629 if ((l
->sec
->flags
& SEC_GROUP
) == 0
13630 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
13632 first
->output_section
= bfd_abs_section_ptr
;
13633 first
->kept_section
= l
->sec
;
13634 sec
->output_section
= bfd_abs_section_ptr
;
13639 /* Check this linkonce section against single member groups. */
13640 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
13641 if (l
->sec
->flags
& SEC_GROUP
)
13643 asection
*first
= elf_next_in_group (l
->sec
);
13646 && elf_next_in_group (first
) == first
13647 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
13649 sec
->output_section
= bfd_abs_section_ptr
;
13650 sec
->kept_section
= first
;
13655 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
13656 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
13657 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
13658 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
13659 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
13660 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
13661 `.gnu.linkonce.t.F' section from a different bfd not requiring any
13662 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
13663 The reverse order cannot happen as there is never a bfd with only the
13664 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
13665 matter as here were are looking only for cross-bfd sections. */
13667 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
13668 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
13669 if ((l
->sec
->flags
& SEC_GROUP
) == 0
13670 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
13672 if (abfd
!= l
->sec
->owner
)
13673 sec
->output_section
= bfd_abs_section_ptr
;
13677 /* This is the first section with this name. Record it. */
13678 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
13679 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
13680 return sec
->output_section
== bfd_abs_section_ptr
;
13684 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
13686 return sym
->st_shndx
== SHN_COMMON
;
13690 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
13696 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
13698 return bfd_com_section_ptr
;
13702 _bfd_elf_default_got_elt_size (bfd
*abfd
,
13703 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
13704 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
13705 bfd
*ibfd ATTRIBUTE_UNUSED
,
13706 unsigned long symndx ATTRIBUTE_UNUSED
)
13708 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13709 return bed
->s
->arch_size
/ 8;
13712 /* Routines to support the creation of dynamic relocs. */
13714 /* Returns the name of the dynamic reloc section associated with SEC. */
13716 static const char *
13717 get_dynamic_reloc_section_name (bfd
* abfd
,
13719 bfd_boolean is_rela
)
13722 const char *old_name
= bfd_get_section_name (NULL
, sec
);
13723 const char *prefix
= is_rela
? ".rela" : ".rel";
13725 if (old_name
== NULL
)
13728 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
13729 sprintf (name
, "%s%s", prefix
, old_name
);
13734 /* Returns the dynamic reloc section associated with SEC.
13735 If necessary compute the name of the dynamic reloc section based
13736 on SEC's name (looked up in ABFD's string table) and the setting
13740 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
13742 bfd_boolean is_rela
)
13744 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
13746 if (reloc_sec
== NULL
)
13748 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
13752 reloc_sec
= bfd_get_linker_section (abfd
, name
);
13754 if (reloc_sec
!= NULL
)
13755 elf_section_data (sec
)->sreloc
= reloc_sec
;
13762 /* Returns the dynamic reloc section associated with SEC. If the
13763 section does not exist it is created and attached to the DYNOBJ
13764 bfd and stored in the SRELOC field of SEC's elf_section_data
13767 ALIGNMENT is the alignment for the newly created section and
13768 IS_RELA defines whether the name should be .rela.<SEC's name>
13769 or .rel.<SEC's name>. The section name is looked up in the
13770 string table associated with ABFD. */
13773 _bfd_elf_make_dynamic_reloc_section (asection
*sec
,
13775 unsigned int alignment
,
13777 bfd_boolean is_rela
)
13779 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
13781 if (reloc_sec
== NULL
)
13783 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
13788 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
13790 if (reloc_sec
== NULL
)
13792 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
13793 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
13794 if ((sec
->flags
& SEC_ALLOC
) != 0)
13795 flags
|= SEC_ALLOC
| SEC_LOAD
;
13797 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
13798 if (reloc_sec
!= NULL
)
13800 /* _bfd_elf_get_sec_type_attr chooses a section type by
13801 name. Override as it may be wrong, eg. for a user
13802 section named "auto" we'll get ".relauto" which is
13803 seen to be a .rela section. */
13804 elf_section_type (reloc_sec
) = is_rela
? SHT_RELA
: SHT_REL
;
13805 if (! bfd_set_section_alignment (dynobj
, reloc_sec
, alignment
))
13810 elf_section_data (sec
)->sreloc
= reloc_sec
;
13816 /* Copy the ELF symbol type and other attributes for a linker script
13817 assignment from HSRC to HDEST. Generally this should be treated as
13818 if we found a strong non-dynamic definition for HDEST (except that
13819 ld ignores multiple definition errors). */
13821 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd
,
13822 struct bfd_link_hash_entry
*hdest
,
13823 struct bfd_link_hash_entry
*hsrc
)
13825 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*) hdest
;
13826 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*) hsrc
;
13827 Elf_Internal_Sym isym
;
13829 ehdest
->type
= ehsrc
->type
;
13830 ehdest
->target_internal
= ehsrc
->target_internal
;
13832 isym
.st_other
= ehsrc
->other
;
13833 elf_merge_st_other (abfd
, ehdest
, &isym
, NULL
, TRUE
, FALSE
);
13836 /* Append a RELA relocation REL to section S in BFD. */
13839 elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13841 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13842 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
13843 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
13844 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
13847 /* Append a REL relocation REL to section S in BFD. */
13850 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13852 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13853 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
13854 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
13855 bed
->s
->swap_reloc_out (abfd
, rel
, loc
);