1 /* ELF linking support for BFD.
2 Copyright (C) 1995-2019 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. */
27 #include "safe-ctype.h"
28 #include "libiberty.h"
30 #if BFD_SUPPORTS_PLUGINS
31 #include "plugin-api.h"
35 /* This struct is used to pass information to routines called via
36 elf_link_hash_traverse which must return failure. */
38 struct elf_info_failed
40 struct bfd_link_info
*info
;
44 /* This structure is used to pass information to
45 _bfd_elf_link_find_version_dependencies. */
47 struct elf_find_verdep_info
49 /* General link information. */
50 struct bfd_link_info
*info
;
51 /* The number of dependencies. */
53 /* Whether we had a failure. */
57 static bfd_boolean _bfd_elf_fix_symbol_flags
58 (struct elf_link_hash_entry
*, struct elf_info_failed
*);
61 _bfd_elf_section_for_symbol (struct elf_reloc_cookie
*cookie
,
62 unsigned long r_symndx
,
65 if (r_symndx
>= cookie
->locsymcount
66 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
68 struct elf_link_hash_entry
*h
;
70 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
72 while (h
->root
.type
== bfd_link_hash_indirect
73 || h
->root
.type
== bfd_link_hash_warning
)
74 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
76 if ((h
->root
.type
== bfd_link_hash_defined
77 || h
->root
.type
== bfd_link_hash_defweak
)
78 && discarded_section (h
->root
.u
.def
.section
))
79 return h
->root
.u
.def
.section
;
85 /* It's not a relocation against a global symbol,
86 but it could be a relocation against a local
87 symbol for a discarded section. */
89 Elf_Internal_Sym
*isym
;
91 /* Need to: get the symbol; get the section. */
92 isym
= &cookie
->locsyms
[r_symndx
];
93 isec
= bfd_section_from_elf_index (cookie
->abfd
, isym
->st_shndx
);
95 && discard
? discarded_section (isec
) : 1)
101 /* Define a symbol in a dynamic linkage section. */
103 struct elf_link_hash_entry
*
104 _bfd_elf_define_linkage_sym (bfd
*abfd
,
105 struct bfd_link_info
*info
,
109 struct elf_link_hash_entry
*h
;
110 struct bfd_link_hash_entry
*bh
;
111 const struct elf_backend_data
*bed
;
113 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, FALSE
);
116 /* Zap symbol defined in an as-needed lib that wasn't linked.
117 This is a symptom of a larger problem: Absolute symbols
118 defined in shared libraries can't be overridden, because we
119 lose the link to the bfd which is via the symbol section. */
120 h
->root
.type
= bfd_link_hash_new
;
126 bed
= get_elf_backend_data (abfd
);
127 if (!_bfd_generic_link_add_one_symbol (info
, abfd
, name
, BSF_GLOBAL
,
128 sec
, 0, NULL
, FALSE
, bed
->collect
,
131 h
= (struct elf_link_hash_entry
*) bh
;
132 BFD_ASSERT (h
!= NULL
);
135 h
->root
.linker_def
= 1;
136 h
->type
= STT_OBJECT
;
137 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
138 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
140 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
145 _bfd_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
149 struct elf_link_hash_entry
*h
;
150 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
151 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
153 /* This function may be called more than once. */
154 if (htab
->sgot
!= NULL
)
157 flags
= bed
->dynamic_sec_flags
;
159 s
= bfd_make_section_anyway_with_flags (abfd
,
160 (bed
->rela_plts_and_copies_p
161 ? ".rela.got" : ".rel.got"),
162 (bed
->dynamic_sec_flags
165 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
169 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
171 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
175 if (bed
->want_got_plt
)
177 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
179 || !bfd_set_section_alignment (abfd
, s
,
180 bed
->s
->log_file_align
))
185 /* The first bit of the global offset table is the header. */
186 s
->size
+= bed
->got_header_size
;
188 if (bed
->want_got_sym
)
190 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
191 (or .got.plt) section. We don't do this in the linker script
192 because we don't want to define the symbol if we are not creating
193 a global offset table. */
194 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
195 "_GLOBAL_OFFSET_TABLE_");
196 elf_hash_table (info
)->hgot
= h
;
204 /* Create a strtab to hold the dynamic symbol names. */
206 _bfd_elf_link_create_dynstrtab (bfd
*abfd
, struct bfd_link_info
*info
)
208 struct elf_link_hash_table
*hash_table
;
210 hash_table
= elf_hash_table (info
);
211 if (hash_table
->dynobj
== NULL
)
213 /* We may not set dynobj, an input file holding linker created
214 dynamic sections to abfd, which may be a dynamic object with
215 its own dynamic sections. We need to find a normal input file
216 to hold linker created sections if possible. */
217 if ((abfd
->flags
& (DYNAMIC
| BFD_PLUGIN
)) != 0)
221 for (ibfd
= info
->input_bfds
; ibfd
; ibfd
= ibfd
->link
.next
)
223 & (DYNAMIC
| BFD_LINKER_CREATED
| BFD_PLUGIN
)) == 0
224 && bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
225 && elf_object_id (ibfd
) == elf_hash_table_id (hash_table
)
226 && !((s
= ibfd
->sections
) != NULL
227 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
))
233 hash_table
->dynobj
= abfd
;
236 if (hash_table
->dynstr
== NULL
)
238 hash_table
->dynstr
= _bfd_elf_strtab_init ();
239 if (hash_table
->dynstr
== NULL
)
245 /* Create some sections which will be filled in with dynamic linking
246 information. ABFD is an input file which requires dynamic sections
247 to be created. The dynamic sections take up virtual memory space
248 when the final executable is run, so we need to create them before
249 addresses are assigned to the output sections. We work out the
250 actual contents and size of these sections later. */
253 _bfd_elf_link_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
257 const struct elf_backend_data
*bed
;
258 struct elf_link_hash_entry
*h
;
260 if (! is_elf_hash_table (info
->hash
))
263 if (elf_hash_table (info
)->dynamic_sections_created
)
266 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
269 abfd
= elf_hash_table (info
)->dynobj
;
270 bed
= get_elf_backend_data (abfd
);
272 flags
= bed
->dynamic_sec_flags
;
274 /* A dynamically linked executable has a .interp section, but a
275 shared library does not. */
276 if (bfd_link_executable (info
) && !info
->nointerp
)
278 s
= bfd_make_section_anyway_with_flags (abfd
, ".interp",
279 flags
| SEC_READONLY
);
284 /* Create sections to hold version informations. These are removed
285 if they are not needed. */
286 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_d",
287 flags
| SEC_READONLY
);
289 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
292 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version",
293 flags
| SEC_READONLY
);
295 || ! bfd_set_section_alignment (abfd
, s
, 1))
298 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_r",
299 flags
| SEC_READONLY
);
301 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
304 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynsym",
305 flags
| SEC_READONLY
);
307 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
309 elf_hash_table (info
)->dynsym
= s
;
311 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynstr",
312 flags
| SEC_READONLY
);
316 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynamic", flags
);
318 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
321 /* The special symbol _DYNAMIC is always set to the start of the
322 .dynamic section. We could set _DYNAMIC in a linker script, but we
323 only want to define it if we are, in fact, creating a .dynamic
324 section. We don't want to define it if there is no .dynamic
325 section, since on some ELF platforms the start up code examines it
326 to decide how to initialize the process. */
327 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "_DYNAMIC");
328 elf_hash_table (info
)->hdynamic
= h
;
334 s
= bfd_make_section_anyway_with_flags (abfd
, ".hash",
335 flags
| SEC_READONLY
);
337 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
339 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
342 if (info
->emit_gnu_hash
)
344 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.hash",
345 flags
| SEC_READONLY
);
347 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
349 /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section:
350 4 32-bit words followed by variable count of 64-bit words, then
351 variable count of 32-bit words. */
352 if (bed
->s
->arch_size
== 64)
353 elf_section_data (s
)->this_hdr
.sh_entsize
= 0;
355 elf_section_data (s
)->this_hdr
.sh_entsize
= 4;
358 /* Let the backend create the rest of the sections. This lets the
359 backend set the right flags. The backend will normally create
360 the .got and .plt sections. */
361 if (bed
->elf_backend_create_dynamic_sections
== NULL
362 || ! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
365 elf_hash_table (info
)->dynamic_sections_created
= TRUE
;
370 /* Create dynamic sections when linking against a dynamic object. */
373 _bfd_elf_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
375 flagword flags
, pltflags
;
376 struct elf_link_hash_entry
*h
;
378 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
379 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
381 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
382 .rel[a].bss sections. */
383 flags
= bed
->dynamic_sec_flags
;
386 if (bed
->plt_not_loaded
)
387 /* We do not clear SEC_ALLOC here because we still want the OS to
388 allocate space for the section; it's just that there's nothing
389 to read in from the object file. */
390 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
392 pltflags
|= SEC_ALLOC
| SEC_CODE
| SEC_LOAD
;
393 if (bed
->plt_readonly
)
394 pltflags
|= SEC_READONLY
;
396 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
398 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
402 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
404 if (bed
->want_plt_sym
)
406 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
407 "_PROCEDURE_LINKAGE_TABLE_");
408 elf_hash_table (info
)->hplt
= h
;
413 s
= bfd_make_section_anyway_with_flags (abfd
,
414 (bed
->rela_plts_and_copies_p
415 ? ".rela.plt" : ".rel.plt"),
416 flags
| SEC_READONLY
);
418 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
422 if (! _bfd_elf_create_got_section (abfd
, info
))
425 if (bed
->want_dynbss
)
427 /* The .dynbss section is a place to put symbols which are defined
428 by dynamic objects, are referenced by regular objects, and are
429 not functions. We must allocate space for them in the process
430 image and use a R_*_COPY reloc to tell the dynamic linker to
431 initialize them at run time. The linker script puts the .dynbss
432 section into the .bss section of the final image. */
433 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
434 SEC_ALLOC
| SEC_LINKER_CREATED
);
439 if (bed
->want_dynrelro
)
441 /* Similarly, but for symbols that were originally in read-only
442 sections. This section doesn't really need to have contents,
443 but make it like other .data.rel.ro sections. */
444 s
= bfd_make_section_anyway_with_flags (abfd
, ".data.rel.ro",
451 /* The .rel[a].bss section holds copy relocs. This section is not
452 normally needed. We need to create it here, though, so that the
453 linker will map it to an output section. We can't just create it
454 only if we need it, because we will not know whether we need it
455 until we have seen all the input files, and the first time the
456 main linker code calls BFD after examining all the input files
457 (size_dynamic_sections) the input sections have already been
458 mapped to the output sections. If the section turns out not to
459 be needed, we can discard it later. We will never need this
460 section when generating a shared object, since they do not use
462 if (bfd_link_executable (info
))
464 s
= bfd_make_section_anyway_with_flags (abfd
,
465 (bed
->rela_plts_and_copies_p
466 ? ".rela.bss" : ".rel.bss"),
467 flags
| SEC_READONLY
);
469 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
473 if (bed
->want_dynrelro
)
475 s
= (bfd_make_section_anyway_with_flags
476 (abfd
, (bed
->rela_plts_and_copies_p
477 ? ".rela.data.rel.ro" : ".rel.data.rel.ro"),
478 flags
| SEC_READONLY
));
480 || ! bfd_set_section_alignment (abfd
, s
,
481 bed
->s
->log_file_align
))
483 htab
->sreldynrelro
= s
;
491 /* Record a new dynamic symbol. We record the dynamic symbols as we
492 read the input files, since we need to have a list of all of them
493 before we can determine the final sizes of the output sections.
494 Note that we may actually call this function even though we are not
495 going to output any dynamic symbols; in some cases we know that a
496 symbol should be in the dynamic symbol table, but only if there is
500 bfd_elf_link_record_dynamic_symbol (struct bfd_link_info
*info
,
501 struct elf_link_hash_entry
*h
)
503 if (h
->dynindx
== -1)
505 struct elf_strtab_hash
*dynstr
;
510 /* XXX: The ABI draft says the linker must turn hidden and
511 internal symbols into STB_LOCAL symbols when producing the
512 DSO. However, if ld.so honors st_other in the dynamic table,
513 this would not be necessary. */
514 switch (ELF_ST_VISIBILITY (h
->other
))
518 if (h
->root
.type
!= bfd_link_hash_undefined
519 && h
->root
.type
!= bfd_link_hash_undefweak
)
522 if (!elf_hash_table (info
)->is_relocatable_executable
)
530 h
->dynindx
= elf_hash_table (info
)->dynsymcount
;
531 ++elf_hash_table (info
)->dynsymcount
;
533 dynstr
= elf_hash_table (info
)->dynstr
;
536 /* Create a strtab to hold the dynamic symbol names. */
537 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
542 /* We don't put any version information in the dynamic string
544 name
= h
->root
.root
.string
;
545 p
= strchr (name
, ELF_VER_CHR
);
547 /* We know that the p points into writable memory. In fact,
548 there are only a few symbols that have read-only names, being
549 those like _GLOBAL_OFFSET_TABLE_ that are created specially
550 by the backends. Most symbols will have names pointing into
551 an ELF string table read from a file, or to objalloc memory. */
554 indx
= _bfd_elf_strtab_add (dynstr
, name
, p
!= NULL
);
559 if (indx
== (size_t) -1)
561 h
->dynstr_index
= indx
;
567 /* Mark a symbol dynamic. */
570 bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info
*info
,
571 struct elf_link_hash_entry
*h
,
572 Elf_Internal_Sym
*sym
)
574 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
576 /* It may be called more than once on the same H. */
577 if(h
->dynamic
|| bfd_link_relocatable (info
))
580 if ((info
->dynamic_data
581 && (h
->type
== STT_OBJECT
582 || h
->type
== STT_COMMON
584 && (ELF_ST_TYPE (sym
->st_info
) == STT_OBJECT
585 || ELF_ST_TYPE (sym
->st_info
) == STT_COMMON
))))
588 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
591 /* NB: If a symbol is made dynamic by --dynamic-list, it has
593 h
->root
.non_ir_ref_dynamic
= 1;
597 /* Record an assignment to a symbol made by a linker script. We need
598 this in case some dynamic object refers to this symbol. */
601 bfd_elf_record_link_assignment (bfd
*output_bfd
,
602 struct bfd_link_info
*info
,
607 struct elf_link_hash_entry
*h
, *hv
;
608 struct elf_link_hash_table
*htab
;
609 const struct elf_backend_data
*bed
;
611 if (!is_elf_hash_table (info
->hash
))
614 htab
= elf_hash_table (info
);
615 h
= elf_link_hash_lookup (htab
, name
, !provide
, TRUE
, FALSE
);
619 if (h
->root
.type
== bfd_link_hash_warning
)
620 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
622 if (h
->versioned
== unknown
)
624 /* Set versioned if symbol version is unknown. */
625 char *version
= strrchr (name
, ELF_VER_CHR
);
628 if (version
> name
&& version
[-1] != ELF_VER_CHR
)
629 h
->versioned
= versioned_hidden
;
631 h
->versioned
= versioned
;
635 /* Symbols defined in a linker script but not referenced anywhere
636 else will have non_elf set. */
639 bfd_elf_link_mark_dynamic_symbol (info
, h
, NULL
);
643 switch (h
->root
.type
)
645 case bfd_link_hash_defined
:
646 case bfd_link_hash_defweak
:
647 case bfd_link_hash_common
:
649 case bfd_link_hash_undefweak
:
650 case bfd_link_hash_undefined
:
651 /* Since we're defining the symbol, don't let it seem to have not
652 been defined. record_dynamic_symbol and size_dynamic_sections
653 may depend on this. */
654 h
->root
.type
= bfd_link_hash_new
;
655 if (h
->root
.u
.undef
.next
!= NULL
|| htab
->root
.undefs_tail
== &h
->root
)
656 bfd_link_repair_undef_list (&htab
->root
);
658 case bfd_link_hash_new
:
660 case bfd_link_hash_indirect
:
661 /* We had a versioned symbol in a dynamic library. We make the
662 the versioned symbol point to this one. */
663 bed
= get_elf_backend_data (output_bfd
);
665 while (hv
->root
.type
== bfd_link_hash_indirect
666 || hv
->root
.type
== bfd_link_hash_warning
)
667 hv
= (struct elf_link_hash_entry
*) hv
->root
.u
.i
.link
;
668 /* We don't need to update h->root.u since linker will set them
670 h
->root
.type
= bfd_link_hash_undefined
;
671 hv
->root
.type
= bfd_link_hash_indirect
;
672 hv
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
673 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hv
);
680 /* If this symbol is being provided by the linker script, and it is
681 currently defined by a dynamic object, but not by a regular
682 object, then mark it as undefined so that the generic linker will
683 force the correct value. */
687 h
->root
.type
= bfd_link_hash_undefined
;
689 /* If this symbol is currently defined by a dynamic object, but not
690 by a regular object, then clear out any version information because
691 the symbol will not be associated with the dynamic object any
693 if (h
->def_dynamic
&& !h
->def_regular
)
694 h
->verinfo
.verdef
= NULL
;
696 /* Make sure this symbol is not garbage collected. */
703 bed
= get_elf_backend_data (output_bfd
);
704 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
705 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
706 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
709 /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects
711 if (!bfd_link_relocatable (info
)
713 && (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
714 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
))
719 || bfd_link_dll (info
)
720 || elf_hash_table (info
)->is_relocatable_executable
)
724 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
727 /* If this is a weak defined symbol, and we know a corresponding
728 real symbol from the same dynamic object, make sure the real
729 symbol is also made into a dynamic symbol. */
732 struct elf_link_hash_entry
*def
= weakdef (h
);
734 if (def
->dynindx
== -1
735 && !bfd_elf_link_record_dynamic_symbol (info
, def
))
743 /* Record a new local dynamic symbol. Returns 0 on failure, 1 on
744 success, and 2 on a failure caused by attempting to record a symbol
745 in a discarded section, eg. a discarded link-once section symbol. */
748 bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info
*info
,
753 struct elf_link_local_dynamic_entry
*entry
;
754 struct elf_link_hash_table
*eht
;
755 struct elf_strtab_hash
*dynstr
;
758 Elf_External_Sym_Shndx eshndx
;
759 char esym
[sizeof (Elf64_External_Sym
)];
761 if (! is_elf_hash_table (info
->hash
))
764 /* See if the entry exists already. */
765 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
766 if (entry
->input_bfd
== input_bfd
&& entry
->input_indx
== input_indx
)
769 amt
= sizeof (*entry
);
770 entry
= (struct elf_link_local_dynamic_entry
*) bfd_alloc (input_bfd
, amt
);
774 /* Go find the symbol, so that we can find it's name. */
775 if (!bfd_elf_get_elf_syms (input_bfd
, &elf_tdata (input_bfd
)->symtab_hdr
,
776 1, input_indx
, &entry
->isym
, esym
, &eshndx
))
778 bfd_release (input_bfd
, entry
);
782 if (entry
->isym
.st_shndx
!= SHN_UNDEF
783 && entry
->isym
.st_shndx
< SHN_LORESERVE
)
787 s
= bfd_section_from_elf_index (input_bfd
, entry
->isym
.st_shndx
);
788 if (s
== NULL
|| bfd_is_abs_section (s
->output_section
))
790 /* We can still bfd_release here as nothing has done another
791 bfd_alloc. We can't do this later in this function. */
792 bfd_release (input_bfd
, entry
);
797 name
= (bfd_elf_string_from_elf_section
798 (input_bfd
, elf_tdata (input_bfd
)->symtab_hdr
.sh_link
,
799 entry
->isym
.st_name
));
801 dynstr
= elf_hash_table (info
)->dynstr
;
804 /* Create a strtab to hold the dynamic symbol names. */
805 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
810 dynstr_index
= _bfd_elf_strtab_add (dynstr
, name
, FALSE
);
811 if (dynstr_index
== (size_t) -1)
813 entry
->isym
.st_name
= dynstr_index
;
815 eht
= elf_hash_table (info
);
817 entry
->next
= eht
->dynlocal
;
818 eht
->dynlocal
= entry
;
819 entry
->input_bfd
= input_bfd
;
820 entry
->input_indx
= input_indx
;
823 /* Whatever binding the symbol had before, it's now local. */
825 = ELF_ST_INFO (STB_LOCAL
, ELF_ST_TYPE (entry
->isym
.st_info
));
827 /* The dynindx will be set at the end of size_dynamic_sections. */
832 /* Return the dynindex of a local dynamic symbol. */
835 _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info
*info
,
839 struct elf_link_local_dynamic_entry
*e
;
841 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
842 if (e
->input_bfd
== input_bfd
&& e
->input_indx
== input_indx
)
847 /* This function is used to renumber the dynamic symbols, if some of
848 them are removed because they are marked as local. This is called
849 via elf_link_hash_traverse. */
852 elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
855 size_t *count
= (size_t *) data
;
860 if (h
->dynindx
!= -1)
861 h
->dynindx
= ++(*count
);
867 /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with
868 STB_LOCAL binding. */
871 elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
874 size_t *count
= (size_t *) data
;
876 if (!h
->forced_local
)
879 if (h
->dynindx
!= -1)
880 h
->dynindx
= ++(*count
);
885 /* Return true if the dynamic symbol for a given section should be
886 omitted when creating a shared library. */
888 _bfd_elf_omit_section_dynsym_default (bfd
*output_bfd ATTRIBUTE_UNUSED
,
889 struct bfd_link_info
*info
,
892 struct elf_link_hash_table
*htab
;
895 switch (elf_section_data (p
)->this_hdr
.sh_type
)
899 /* If sh_type is yet undecided, assume it could be
900 SHT_PROGBITS/SHT_NOBITS. */
902 htab
= elf_hash_table (info
);
903 if (htab
->text_index_section
!= NULL
)
904 return p
!= htab
->text_index_section
&& p
!= htab
->data_index_section
;
906 return (htab
->dynobj
!= NULL
907 && (ip
= bfd_get_linker_section (htab
->dynobj
, p
->name
)) != NULL
908 && ip
->output_section
== p
);
910 /* There shouldn't be section relative relocations
911 against any other section. */
918 _bfd_elf_omit_section_dynsym_all
919 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
920 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
921 asection
*p ATTRIBUTE_UNUSED
)
926 /* Assign dynsym indices. In a shared library we generate a section
927 symbol for each output section, which come first. Next come symbols
928 which have been forced to local binding. Then all of the back-end
929 allocated local dynamic syms, followed by the rest of the global
930 symbols. If SECTION_SYM_COUNT is NULL, section dynindx is not set.
931 (This prevents the early call before elf_backend_init_index_section
932 and strip_excluded_output_sections setting dynindx for sections
933 that are stripped.) */
936 _bfd_elf_link_renumber_dynsyms (bfd
*output_bfd
,
937 struct bfd_link_info
*info
,
938 unsigned long *section_sym_count
)
940 unsigned long dynsymcount
= 0;
941 bfd_boolean do_sec
= section_sym_count
!= NULL
;
943 if (bfd_link_pic (info
)
944 || elf_hash_table (info
)->is_relocatable_executable
)
946 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
948 for (p
= output_bfd
->sections
; p
; p
= p
->next
)
949 if ((p
->flags
& SEC_EXCLUDE
) == 0
950 && (p
->flags
& SEC_ALLOC
) != 0
951 && elf_hash_table (info
)->dynamic_relocs
952 && !(*bed
->elf_backend_omit_section_dynsym
) (output_bfd
, info
, p
))
956 elf_section_data (p
)->dynindx
= dynsymcount
;
959 elf_section_data (p
)->dynindx
= 0;
962 *section_sym_count
= dynsymcount
;
964 elf_link_hash_traverse (elf_hash_table (info
),
965 elf_link_renumber_local_hash_table_dynsyms
,
968 if (elf_hash_table (info
)->dynlocal
)
970 struct elf_link_local_dynamic_entry
*p
;
971 for (p
= elf_hash_table (info
)->dynlocal
; p
; p
= p
->next
)
972 p
->dynindx
= ++dynsymcount
;
974 elf_hash_table (info
)->local_dynsymcount
= dynsymcount
;
976 elf_link_hash_traverse (elf_hash_table (info
),
977 elf_link_renumber_hash_table_dynsyms
,
980 /* There is an unused NULL entry at the head of the table which we
981 must account for in our count even if the table is empty since it
982 is intended for the mandatory DT_SYMTAB tag (.dynsym section) in
986 elf_hash_table (info
)->dynsymcount
= dynsymcount
;
990 /* Merge st_other field. */
993 elf_merge_st_other (bfd
*abfd
, struct elf_link_hash_entry
*h
,
994 const Elf_Internal_Sym
*isym
, asection
*sec
,
995 bfd_boolean definition
, bfd_boolean dynamic
)
997 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
999 /* If st_other has a processor-specific meaning, specific
1000 code might be needed here. */
1001 if (bed
->elf_backend_merge_symbol_attribute
)
1002 (*bed
->elf_backend_merge_symbol_attribute
) (h
, isym
, definition
,
1007 unsigned symvis
= ELF_ST_VISIBILITY (isym
->st_other
);
1008 unsigned hvis
= ELF_ST_VISIBILITY (h
->other
);
1010 /* Keep the most constraining visibility. Leave the remainder
1011 of the st_other field to elf_backend_merge_symbol_attribute. */
1012 if (symvis
- 1 < hvis
- 1)
1013 h
->other
= symvis
| (h
->other
& ~ELF_ST_VISIBILITY (-1));
1016 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_DEFAULT
1017 && (sec
->flags
& SEC_READONLY
) == 0)
1018 h
->protected_def
= 1;
1021 /* This function is called when we want to merge a new symbol with an
1022 existing symbol. It handles the various cases which arise when we
1023 find a definition in a dynamic object, or when there is already a
1024 definition in a dynamic object. The new symbol is described by
1025 NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table
1026 entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK
1027 if the old symbol was weak. We set POLD_ALIGNMENT to the alignment
1028 of an old common symbol. We set OVERRIDE if the old symbol is
1029 overriding a new definition. We set TYPE_CHANGE_OK if it is OK for
1030 the type to change. We set SIZE_CHANGE_OK if it is OK for the size
1031 to change. By OK to change, we mean that we shouldn't warn if the
1032 type or size does change. */
1035 _bfd_elf_merge_symbol (bfd
*abfd
,
1036 struct bfd_link_info
*info
,
1038 Elf_Internal_Sym
*sym
,
1041 struct elf_link_hash_entry
**sym_hash
,
1043 bfd_boolean
*pold_weak
,
1044 unsigned int *pold_alignment
,
1046 bfd_boolean
*override
,
1047 bfd_boolean
*type_change_ok
,
1048 bfd_boolean
*size_change_ok
,
1049 bfd_boolean
*matched
)
1051 asection
*sec
, *oldsec
;
1052 struct elf_link_hash_entry
*h
;
1053 struct elf_link_hash_entry
*hi
;
1054 struct elf_link_hash_entry
*flip
;
1057 bfd_boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
1058 bfd_boolean newweak
, oldweak
, newfunc
, oldfunc
;
1059 const struct elf_backend_data
*bed
;
1061 bfd_boolean default_sym
= *matched
;
1067 bind
= ELF_ST_BIND (sym
->st_info
);
1069 if (! bfd_is_und_section (sec
))
1070 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, FALSE
, FALSE
);
1072 h
= ((struct elf_link_hash_entry
*)
1073 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, TRUE
, FALSE
, FALSE
));
1078 bed
= get_elf_backend_data (abfd
);
1080 /* NEW_VERSION is the symbol version of the new symbol. */
1081 if (h
->versioned
!= unversioned
)
1083 /* Symbol version is unknown or versioned. */
1084 new_version
= strrchr (name
, ELF_VER_CHR
);
1087 if (h
->versioned
== unknown
)
1089 if (new_version
> name
&& new_version
[-1] != ELF_VER_CHR
)
1090 h
->versioned
= versioned_hidden
;
1092 h
->versioned
= versioned
;
1095 if (new_version
[0] == '\0')
1099 h
->versioned
= unversioned
;
1104 /* For merging, we only care about real symbols. But we need to make
1105 sure that indirect symbol dynamic flags are updated. */
1107 while (h
->root
.type
== bfd_link_hash_indirect
1108 || h
->root
.type
== bfd_link_hash_warning
)
1109 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1113 if (hi
== h
|| h
->root
.type
== bfd_link_hash_new
)
1117 /* OLD_HIDDEN is true if the existing symbol is only visible
1118 to the symbol with the same symbol version. NEW_HIDDEN is
1119 true if the new symbol is only visible to the symbol with
1120 the same symbol version. */
1121 bfd_boolean old_hidden
= h
->versioned
== versioned_hidden
;
1122 bfd_boolean new_hidden
= hi
->versioned
== versioned_hidden
;
1123 if (!old_hidden
&& !new_hidden
)
1124 /* The new symbol matches the existing symbol if both
1129 /* OLD_VERSION is the symbol version of the existing
1133 if (h
->versioned
>= versioned
)
1134 old_version
= strrchr (h
->root
.root
.string
,
1139 /* The new symbol matches the existing symbol if they
1140 have the same symbol version. */
1141 *matched
= (old_version
== new_version
1142 || (old_version
!= NULL
1143 && new_version
!= NULL
1144 && strcmp (old_version
, new_version
) == 0));
1149 /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the
1154 switch (h
->root
.type
)
1159 case bfd_link_hash_undefined
:
1160 case bfd_link_hash_undefweak
:
1161 oldbfd
= h
->root
.u
.undef
.abfd
;
1164 case bfd_link_hash_defined
:
1165 case bfd_link_hash_defweak
:
1166 oldbfd
= h
->root
.u
.def
.section
->owner
;
1167 oldsec
= h
->root
.u
.def
.section
;
1170 case bfd_link_hash_common
:
1171 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
1172 oldsec
= h
->root
.u
.c
.p
->section
;
1174 *pold_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1177 if (poldbfd
&& *poldbfd
== NULL
)
1180 /* Differentiate strong and weak symbols. */
1181 newweak
= bind
== STB_WEAK
;
1182 oldweak
= (h
->root
.type
== bfd_link_hash_defweak
1183 || h
->root
.type
== bfd_link_hash_undefweak
);
1185 *pold_weak
= oldweak
;
1187 /* We have to check it for every instance since the first few may be
1188 references and not all compilers emit symbol type for undefined
1190 bfd_elf_link_mark_dynamic_symbol (info
, h
, sym
);
1192 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
1193 respectively, is from a dynamic object. */
1195 newdyn
= (abfd
->flags
& DYNAMIC
) != 0;
1197 /* ref_dynamic_nonweak and dynamic_def flags track actual undefined
1198 syms and defined syms in dynamic libraries respectively.
1199 ref_dynamic on the other hand can be set for a symbol defined in
1200 a dynamic library, and def_dynamic may not be set; When the
1201 definition in a dynamic lib is overridden by a definition in the
1202 executable use of the symbol in the dynamic lib becomes a
1203 reference to the executable symbol. */
1206 if (bfd_is_und_section (sec
))
1208 if (bind
!= STB_WEAK
)
1210 h
->ref_dynamic_nonweak
= 1;
1211 hi
->ref_dynamic_nonweak
= 1;
1216 /* Update the existing symbol only if they match. */
1219 hi
->dynamic_def
= 1;
1223 /* If we just created the symbol, mark it as being an ELF symbol.
1224 Other than that, there is nothing to do--there is no merge issue
1225 with a newly defined symbol--so we just return. */
1227 if (h
->root
.type
== bfd_link_hash_new
)
1233 /* In cases involving weak versioned symbols, we may wind up trying
1234 to merge a symbol with itself. Catch that here, to avoid the
1235 confusion that results if we try to override a symbol with
1236 itself. The additional tests catch cases like
1237 _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
1238 dynamic object, which we do want to handle here. */
1240 && (newweak
|| oldweak
)
1241 && ((abfd
->flags
& DYNAMIC
) == 0
1242 || !h
->def_regular
))
1247 olddyn
= (oldbfd
->flags
& DYNAMIC
) != 0;
1248 else if (oldsec
!= NULL
)
1250 /* This handles the special SHN_MIPS_{TEXT,DATA} section
1251 indices used by MIPS ELF. */
1252 olddyn
= (oldsec
->symbol
->flags
& BSF_DYNAMIC
) != 0;
1255 /* Handle a case where plugin_notice won't be called and thus won't
1256 set the non_ir_ref flags on the first pass over symbols. */
1258 && (oldbfd
->flags
& BFD_PLUGIN
) != (abfd
->flags
& BFD_PLUGIN
)
1259 && newdyn
!= olddyn
)
1261 h
->root
.non_ir_ref_dynamic
= TRUE
;
1262 hi
->root
.non_ir_ref_dynamic
= TRUE
;
1265 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
1266 respectively, appear to be a definition rather than reference. */
1268 newdef
= !bfd_is_und_section (sec
) && !bfd_is_com_section (sec
);
1270 olddef
= (h
->root
.type
!= bfd_link_hash_undefined
1271 && h
->root
.type
!= bfd_link_hash_undefweak
1272 && h
->root
.type
!= bfd_link_hash_common
);
1274 /* NEWFUNC and OLDFUNC indicate whether the new or old symbol,
1275 respectively, appear to be a function. */
1277 newfunc
= (ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1278 && bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)));
1280 oldfunc
= (h
->type
!= STT_NOTYPE
1281 && bed
->is_function_type (h
->type
));
1283 if (!(newfunc
&& oldfunc
)
1284 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1285 && ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1286 && h
->type
!= STT_NOTYPE
1287 && (newdef
|| bfd_is_com_section (sec
))
1288 && (olddef
|| h
->root
.type
== bfd_link_hash_common
))
1290 /* If creating a default indirect symbol ("foo" or "foo@") from
1291 a dynamic versioned definition ("foo@@") skip doing so if
1292 there is an existing regular definition with a different
1293 type. We don't want, for example, a "time" variable in the
1294 executable overriding a "time" function in a shared library. */
1302 /* When adding a symbol from a regular object file after we have
1303 created indirect symbols, undo the indirection and any
1310 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1311 h
->forced_local
= 0;
1315 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1317 h
->root
.type
= bfd_link_hash_undefined
;
1318 h
->root
.u
.undef
.abfd
= abfd
;
1322 h
->root
.type
= bfd_link_hash_new
;
1323 h
->root
.u
.undef
.abfd
= NULL
;
1329 /* Check TLS symbols. We don't check undefined symbols introduced
1330 by "ld -u" which have no type (and oldbfd NULL), and we don't
1331 check symbols from plugins because they also have no type. */
1333 && (oldbfd
->flags
& BFD_PLUGIN
) == 0
1334 && (abfd
->flags
& BFD_PLUGIN
) == 0
1335 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1336 && (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
|| h
->type
== STT_TLS
))
1339 bfd_boolean ntdef
, tdef
;
1340 asection
*ntsec
, *tsec
;
1342 if (h
->type
== STT_TLS
)
1363 /* xgettext:c-format */
1364 (_("%s: TLS definition in %pB section %pA "
1365 "mismatches non-TLS definition in %pB section %pA"),
1366 h
->root
.root
.string
, tbfd
, tsec
, ntbfd
, ntsec
);
1367 else if (!tdef
&& !ntdef
)
1369 /* xgettext:c-format */
1370 (_("%s: TLS reference in %pB "
1371 "mismatches non-TLS reference in %pB"),
1372 h
->root
.root
.string
, tbfd
, ntbfd
);
1375 /* xgettext:c-format */
1376 (_("%s: TLS definition in %pB section %pA "
1377 "mismatches non-TLS reference in %pB"),
1378 h
->root
.root
.string
, tbfd
, tsec
, ntbfd
);
1381 /* xgettext:c-format */
1382 (_("%s: TLS reference in %pB "
1383 "mismatches non-TLS definition in %pB section %pA"),
1384 h
->root
.root
.string
, tbfd
, ntbfd
, ntsec
);
1386 bfd_set_error (bfd_error_bad_value
);
1390 /* If the old symbol has non-default visibility, we ignore the new
1391 definition from a dynamic object. */
1393 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1394 && !bfd_is_und_section (sec
))
1397 /* Make sure this symbol is dynamic. */
1399 hi
->ref_dynamic
= 1;
1400 /* A protected symbol has external availability. Make sure it is
1401 recorded as dynamic.
1403 FIXME: Should we check type and size for protected symbol? */
1404 if (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
1405 return bfd_elf_link_record_dynamic_symbol (info
, h
);
1410 && ELF_ST_VISIBILITY (sym
->st_other
) != STV_DEFAULT
1413 /* If the new symbol with non-default visibility comes from a
1414 relocatable file and the old definition comes from a dynamic
1415 object, we remove the old definition. */
1416 if (hi
->root
.type
== bfd_link_hash_indirect
)
1418 /* Handle the case where the old dynamic definition is
1419 default versioned. We need to copy the symbol info from
1420 the symbol with default version to the normal one if it
1421 was referenced before. */
1424 hi
->root
.type
= h
->root
.type
;
1425 h
->root
.type
= bfd_link_hash_indirect
;
1426 (*bed
->elf_backend_copy_indirect_symbol
) (info
, hi
, h
);
1428 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1429 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1431 /* If the new symbol is hidden or internal, completely undo
1432 any dynamic link state. */
1433 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1434 h
->forced_local
= 0;
1441 /* FIXME: Should we check type and size for protected symbol? */
1451 /* If the old symbol was undefined before, then it will still be
1452 on the undefs list. If the new symbol is undefined or
1453 common, we can't make it bfd_link_hash_new here, because new
1454 undefined or common symbols will be added to the undefs list
1455 by _bfd_generic_link_add_one_symbol. Symbols may not be
1456 added twice to the undefs list. Also, if the new symbol is
1457 undefweak then we don't want to lose the strong undef. */
1458 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1460 h
->root
.type
= bfd_link_hash_undefined
;
1461 h
->root
.u
.undef
.abfd
= abfd
;
1465 h
->root
.type
= bfd_link_hash_new
;
1466 h
->root
.u
.undef
.abfd
= NULL
;
1469 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1471 /* If the new symbol is hidden or internal, completely undo
1472 any dynamic link state. */
1473 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1474 h
->forced_local
= 0;
1480 /* FIXME: Should we check type and size for protected symbol? */
1486 /* If a new weak symbol definition comes from a regular file and the
1487 old symbol comes from a dynamic library, we treat the new one as
1488 strong. Similarly, an old weak symbol definition from a regular
1489 file is treated as strong when the new symbol comes from a dynamic
1490 library. Further, an old weak symbol from a dynamic library is
1491 treated as strong if the new symbol is from a dynamic library.
1492 This reflects the way glibc's ld.so works.
1494 Also allow a weak symbol to override a linker script symbol
1495 defined by an early pass over the script. This is done so the
1496 linker knows the symbol is defined in an object file, for the
1497 DEFINED script function.
1499 Do this before setting *type_change_ok or *size_change_ok so that
1500 we warn properly when dynamic library symbols are overridden. */
1502 if (newdef
&& !newdyn
&& (olddyn
|| h
->root
.ldscript_def
))
1504 if (olddef
&& newdyn
)
1507 /* Allow changes between different types of function symbol. */
1508 if (newfunc
&& oldfunc
)
1509 *type_change_ok
= TRUE
;
1511 /* It's OK to change the type if either the existing symbol or the
1512 new symbol is weak. A type change is also OK if the old symbol
1513 is undefined and the new symbol is defined. */
1518 && h
->root
.type
== bfd_link_hash_undefined
))
1519 *type_change_ok
= TRUE
;
1521 /* It's OK to change the size if either the existing symbol or the
1522 new symbol is weak, or if the old symbol is undefined. */
1525 || h
->root
.type
== bfd_link_hash_undefined
)
1526 *size_change_ok
= TRUE
;
1528 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
1529 symbol, respectively, appears to be a common symbol in a dynamic
1530 object. If a symbol appears in an uninitialized section, and is
1531 not weak, and is not a function, then it may be a common symbol
1532 which was resolved when the dynamic object was created. We want
1533 to treat such symbols specially, because they raise special
1534 considerations when setting the symbol size: if the symbol
1535 appears as a common symbol in a regular object, and the size in
1536 the regular object is larger, we must make sure that we use the
1537 larger size. This problematic case can always be avoided in C,
1538 but it must be handled correctly when using Fortran shared
1541 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
1542 likewise for OLDDYNCOMMON and OLDDEF.
1544 Note that this test is just a heuristic, and that it is quite
1545 possible to have an uninitialized symbol in a shared object which
1546 is really a definition, rather than a common symbol. This could
1547 lead to some minor confusion when the symbol really is a common
1548 symbol in some regular object. However, I think it will be
1554 && (sec
->flags
& SEC_ALLOC
) != 0
1555 && (sec
->flags
& SEC_LOAD
) == 0
1558 newdyncommon
= TRUE
;
1560 newdyncommon
= FALSE
;
1564 && h
->root
.type
== bfd_link_hash_defined
1566 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
1567 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
1570 olddyncommon
= TRUE
;
1572 olddyncommon
= FALSE
;
1574 /* We now know everything about the old and new symbols. We ask the
1575 backend to check if we can merge them. */
1576 if (bed
->merge_symbol
!= NULL
)
1578 if (!bed
->merge_symbol (h
, sym
, psec
, newdef
, olddef
, oldbfd
, oldsec
))
1583 /* There are multiple definitions of a normal symbol. Skip the
1584 default symbol as well as definition from an IR object. */
1585 if (olddef
&& !olddyn
&& !oldweak
&& newdef
&& !newdyn
&& !newweak
1586 && !default_sym
&& h
->def_regular
1588 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1589 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1591 /* Handle a multiple definition. */
1592 (*info
->callbacks
->multiple_definition
) (info
, &h
->root
,
1593 abfd
, sec
, *pvalue
);
1598 /* If both the old and the new symbols look like common symbols in a
1599 dynamic object, set the size of the symbol to the larger of the
1604 && sym
->st_size
!= h
->size
)
1606 /* Since we think we have two common symbols, issue a multiple
1607 common warning if desired. Note that we only warn if the
1608 size is different. If the size is the same, we simply let
1609 the old symbol override the new one as normally happens with
1610 symbols defined in dynamic objects. */
1612 (*info
->callbacks
->multiple_common
) (info
, &h
->root
, abfd
,
1613 bfd_link_hash_common
, sym
->st_size
);
1614 if (sym
->st_size
> h
->size
)
1615 h
->size
= sym
->st_size
;
1617 *size_change_ok
= TRUE
;
1620 /* If we are looking at a dynamic object, and we have found a
1621 definition, we need to see if the symbol was already defined by
1622 some other object. If so, we want to use the existing
1623 definition, and we do not want to report a multiple symbol
1624 definition error; we do this by clobbering *PSEC to be
1625 bfd_und_section_ptr.
1627 We treat a common symbol as a definition if the symbol in the
1628 shared library is a function, since common symbols always
1629 represent variables; this can cause confusion in principle, but
1630 any such confusion would seem to indicate an erroneous program or
1631 shared library. We also permit a common symbol in a regular
1632 object to override a weak symbol in a shared object. */
1637 || (h
->root
.type
== bfd_link_hash_common
1638 && (newweak
|| newfunc
))))
1642 newdyncommon
= FALSE
;
1644 *psec
= sec
= bfd_und_section_ptr
;
1645 *size_change_ok
= TRUE
;
1647 /* If we get here when the old symbol is a common symbol, then
1648 we are explicitly letting it override a weak symbol or
1649 function in a dynamic object, and we don't want to warn about
1650 a type change. If the old symbol is a defined symbol, a type
1651 change warning may still be appropriate. */
1653 if (h
->root
.type
== bfd_link_hash_common
)
1654 *type_change_ok
= TRUE
;
1657 /* Handle the special case of an old common symbol merging with a
1658 new symbol which looks like a common symbol in a shared object.
1659 We change *PSEC and *PVALUE to make the new symbol look like a
1660 common symbol, and let _bfd_generic_link_add_one_symbol do the
1664 && h
->root
.type
== bfd_link_hash_common
)
1668 newdyncommon
= FALSE
;
1669 *pvalue
= sym
->st_size
;
1670 *psec
= sec
= bed
->common_section (oldsec
);
1671 *size_change_ok
= TRUE
;
1674 /* Skip weak definitions of symbols that are already defined. */
1675 if (newdef
&& olddef
&& newweak
)
1677 /* Don't skip new non-IR weak syms. */
1678 if (!(oldbfd
!= NULL
1679 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1680 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1686 /* Merge st_other. If the symbol already has a dynamic index,
1687 but visibility says it should not be visible, turn it into a
1689 elf_merge_st_other (abfd
, h
, sym
, sec
, newdef
, newdyn
);
1690 if (h
->dynindx
!= -1)
1691 switch (ELF_ST_VISIBILITY (h
->other
))
1695 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1700 /* If the old symbol is from a dynamic object, and the new symbol is
1701 a definition which is not from a dynamic object, then the new
1702 symbol overrides the old symbol. Symbols from regular files
1703 always take precedence over symbols from dynamic objects, even if
1704 they are defined after the dynamic object in the link.
1706 As above, we again permit a common symbol in a regular object to
1707 override a definition in a shared object if the shared object
1708 symbol is a function or is weak. */
1713 || (bfd_is_com_section (sec
)
1714 && (oldweak
|| oldfunc
)))
1719 /* Change the hash table entry to undefined, and let
1720 _bfd_generic_link_add_one_symbol do the right thing with the
1723 h
->root
.type
= bfd_link_hash_undefined
;
1724 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1725 *size_change_ok
= TRUE
;
1728 olddyncommon
= FALSE
;
1730 /* We again permit a type change when a common symbol may be
1731 overriding a function. */
1733 if (bfd_is_com_section (sec
))
1737 /* If a common symbol overrides a function, make sure
1738 that it isn't defined dynamically nor has type
1741 h
->type
= STT_NOTYPE
;
1743 *type_change_ok
= TRUE
;
1746 if (hi
->root
.type
== bfd_link_hash_indirect
)
1749 /* This union may have been set to be non-NULL when this symbol
1750 was seen in a dynamic object. We must force the union to be
1751 NULL, so that it is correct for a regular symbol. */
1752 h
->verinfo
.vertree
= NULL
;
1755 /* Handle the special case of a new common symbol merging with an
1756 old symbol that looks like it might be a common symbol defined in
1757 a shared object. Note that we have already handled the case in
1758 which a new common symbol should simply override the definition
1759 in the shared library. */
1762 && bfd_is_com_section (sec
)
1765 /* It would be best if we could set the hash table entry to a
1766 common symbol, but we don't know what to use for the section
1767 or the alignment. */
1768 (*info
->callbacks
->multiple_common
) (info
, &h
->root
, abfd
,
1769 bfd_link_hash_common
, sym
->st_size
);
1771 /* If the presumed common symbol in the dynamic object is
1772 larger, pretend that the new symbol has its size. */
1774 if (h
->size
> *pvalue
)
1777 /* We need to remember the alignment required by the symbol
1778 in the dynamic object. */
1779 BFD_ASSERT (pold_alignment
);
1780 *pold_alignment
= h
->root
.u
.def
.section
->alignment_power
;
1783 olddyncommon
= FALSE
;
1785 h
->root
.type
= bfd_link_hash_undefined
;
1786 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1788 *size_change_ok
= TRUE
;
1789 *type_change_ok
= TRUE
;
1791 if (hi
->root
.type
== bfd_link_hash_indirect
)
1794 h
->verinfo
.vertree
= NULL
;
1799 /* Handle the case where we had a versioned symbol in a dynamic
1800 library and now find a definition in a normal object. In this
1801 case, we make the versioned symbol point to the normal one. */
1802 flip
->root
.type
= h
->root
.type
;
1803 flip
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
1804 h
->root
.type
= bfd_link_hash_indirect
;
1805 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) flip
;
1806 (*bed
->elf_backend_copy_indirect_symbol
) (info
, flip
, h
);
1810 flip
->ref_dynamic
= 1;
1817 /* This function is called to create an indirect symbol from the
1818 default for the symbol with the default version if needed. The
1819 symbol is described by H, NAME, SYM, SEC, and VALUE. We
1820 set DYNSYM if the new indirect symbol is dynamic. */
1823 _bfd_elf_add_default_symbol (bfd
*abfd
,
1824 struct bfd_link_info
*info
,
1825 struct elf_link_hash_entry
*h
,
1827 Elf_Internal_Sym
*sym
,
1831 bfd_boolean
*dynsym
)
1833 bfd_boolean type_change_ok
;
1834 bfd_boolean size_change_ok
;
1837 struct elf_link_hash_entry
*hi
;
1838 struct bfd_link_hash_entry
*bh
;
1839 const struct elf_backend_data
*bed
;
1840 bfd_boolean collect
;
1841 bfd_boolean dynamic
;
1842 bfd_boolean override
;
1844 size_t len
, shortlen
;
1846 bfd_boolean matched
;
1848 if (h
->versioned
== unversioned
|| h
->versioned
== versioned_hidden
)
1851 /* If this symbol has a version, and it is the default version, we
1852 create an indirect symbol from the default name to the fully
1853 decorated name. This will cause external references which do not
1854 specify a version to be bound to this version of the symbol. */
1855 p
= strchr (name
, ELF_VER_CHR
);
1856 if (h
->versioned
== unknown
)
1860 h
->versioned
= unversioned
;
1865 if (p
[1] != ELF_VER_CHR
)
1867 h
->versioned
= versioned_hidden
;
1871 h
->versioned
= versioned
;
1876 /* PR ld/19073: We may see an unversioned definition after the
1882 bed
= get_elf_backend_data (abfd
);
1883 collect
= bed
->collect
;
1884 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
1886 shortlen
= p
- name
;
1887 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
1888 if (shortname
== NULL
)
1890 memcpy (shortname
, name
, shortlen
);
1891 shortname
[shortlen
] = '\0';
1893 /* We are going to create a new symbol. Merge it with any existing
1894 symbol with this name. For the purposes of the merge, act as
1895 though we were defining the symbol we just defined, although we
1896 actually going to define an indirect symbol. */
1897 type_change_ok
= FALSE
;
1898 size_change_ok
= FALSE
;
1901 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1902 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
1903 &type_change_ok
, &size_change_ok
, &matched
))
1909 if (hi
->def_regular
)
1911 /* If the undecorated symbol will have a version added by a
1912 script different to H, then don't indirect to/from the
1913 undecorated symbol. This isn't ideal because we may not yet
1914 have seen symbol versions, if given by a script on the
1915 command line rather than via --version-script. */
1916 if (hi
->verinfo
.vertree
== NULL
&& info
->version_info
!= NULL
)
1921 = bfd_find_version_for_sym (info
->version_info
,
1922 hi
->root
.root
.string
, &hide
);
1923 if (hi
->verinfo
.vertree
!= NULL
&& hide
)
1925 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
1929 if (hi
->verinfo
.vertree
!= NULL
1930 && strcmp (p
+ 1 + (p
[1] == '@'), hi
->verinfo
.vertree
->name
) != 0)
1936 /* Add the default symbol if not performing a relocatable link. */
1937 if (! bfd_link_relocatable (info
))
1940 if (bh
->type
== bfd_link_hash_defined
1941 && bh
->u
.def
.section
->owner
!= NULL
1942 && (bh
->u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)
1944 /* Mark the previous definition from IR object as
1945 undefined so that the generic linker will override
1947 bh
->type
= bfd_link_hash_undefined
;
1948 bh
->u
.undef
.abfd
= bh
->u
.def
.section
->owner
;
1950 if (! (_bfd_generic_link_add_one_symbol
1951 (info
, abfd
, shortname
, BSF_INDIRECT
,
1952 bfd_ind_section_ptr
,
1953 0, name
, FALSE
, collect
, &bh
)))
1955 hi
= (struct elf_link_hash_entry
*) bh
;
1960 /* In this case the symbol named SHORTNAME is overriding the
1961 indirect symbol we want to add. We were planning on making
1962 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
1963 is the name without a version. NAME is the fully versioned
1964 name, and it is the default version.
1966 Overriding means that we already saw a definition for the
1967 symbol SHORTNAME in a regular object, and it is overriding
1968 the symbol defined in the dynamic object.
1970 When this happens, we actually want to change NAME, the
1971 symbol we just added, to refer to SHORTNAME. This will cause
1972 references to NAME in the shared object to become references
1973 to SHORTNAME in the regular object. This is what we expect
1974 when we override a function in a shared object: that the
1975 references in the shared object will be mapped to the
1976 definition in the regular object. */
1978 while (hi
->root
.type
== bfd_link_hash_indirect
1979 || hi
->root
.type
== bfd_link_hash_warning
)
1980 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1982 h
->root
.type
= bfd_link_hash_indirect
;
1983 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1987 hi
->ref_dynamic
= 1;
1991 if (! bfd_elf_link_record_dynamic_symbol (info
, hi
))
1996 /* Now set HI to H, so that the following code will set the
1997 other fields correctly. */
2001 /* Check if HI is a warning symbol. */
2002 if (hi
->root
.type
== bfd_link_hash_warning
)
2003 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
2005 /* If there is a duplicate definition somewhere, then HI may not
2006 point to an indirect symbol. We will have reported an error to
2007 the user in that case. */
2009 if (hi
->root
.type
== bfd_link_hash_indirect
)
2011 struct elf_link_hash_entry
*ht
;
2013 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
2014 (*bed
->elf_backend_copy_indirect_symbol
) (info
, ht
, hi
);
2016 /* A reference to the SHORTNAME symbol from a dynamic library
2017 will be satisfied by the versioned symbol at runtime. In
2018 effect, we have a reference to the versioned symbol. */
2019 ht
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
2020 hi
->dynamic_def
|= ht
->dynamic_def
;
2022 /* See if the new flags lead us to realize that the symbol must
2028 if (! bfd_link_executable (info
)
2035 if (hi
->ref_regular
)
2041 /* We also need to define an indirection from the nondefault version
2045 len
= strlen (name
);
2046 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, len
);
2047 if (shortname
== NULL
)
2049 memcpy (shortname
, name
, shortlen
);
2050 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
2052 /* Once again, merge with any existing symbol. */
2053 type_change_ok
= FALSE
;
2054 size_change_ok
= FALSE
;
2056 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
2057 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
2058 &type_change_ok
, &size_change_ok
, &matched
))
2066 /* Here SHORTNAME is a versioned name, so we don't expect to see
2067 the type of override we do in the case above unless it is
2068 overridden by a versioned definition. */
2069 if (hi
->root
.type
!= bfd_link_hash_defined
2070 && hi
->root
.type
!= bfd_link_hash_defweak
)
2072 /* xgettext:c-format */
2073 (_("%pB: unexpected redefinition of indirect versioned symbol `%s'"),
2079 if (! (_bfd_generic_link_add_one_symbol
2080 (info
, abfd
, shortname
, BSF_INDIRECT
,
2081 bfd_ind_section_ptr
, 0, name
, FALSE
, collect
, &bh
)))
2083 hi
= (struct elf_link_hash_entry
*) bh
;
2085 /* If there is a duplicate definition somewhere, then HI may not
2086 point to an indirect symbol. We will have reported an error
2087 to the user in that case. */
2089 if (hi
->root
.type
== bfd_link_hash_indirect
)
2091 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
2092 h
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
2093 hi
->dynamic_def
|= h
->dynamic_def
;
2095 /* See if the new flags lead us to realize that the symbol
2101 if (! bfd_link_executable (info
)
2107 if (hi
->ref_regular
)
2117 /* This routine is used to export all defined symbols into the dynamic
2118 symbol table. It is called via elf_link_hash_traverse. */
2121 _bfd_elf_export_symbol (struct elf_link_hash_entry
*h
, void *data
)
2123 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2125 /* Ignore indirect symbols. These are added by the versioning code. */
2126 if (h
->root
.type
== bfd_link_hash_indirect
)
2129 /* Ignore this if we won't export it. */
2130 if (!eif
->info
->export_dynamic
&& !h
->dynamic
)
2133 if (h
->dynindx
== -1
2134 && (h
->def_regular
|| h
->ref_regular
)
2135 && ! bfd_hide_sym_by_version (eif
->info
->version_info
,
2136 h
->root
.root
.string
))
2138 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2148 /* Look through the symbols which are defined in other shared
2149 libraries and referenced here. Update the list of version
2150 dependencies. This will be put into the .gnu.version_r section.
2151 This function is called via elf_link_hash_traverse. */
2154 _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry
*h
,
2157 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
2158 Elf_Internal_Verneed
*t
;
2159 Elf_Internal_Vernaux
*a
;
2162 /* We only care about symbols defined in shared objects with version
2167 || h
->verinfo
.verdef
== NULL
2168 || (elf_dyn_lib_class (h
->verinfo
.verdef
->vd_bfd
)
2169 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
| DYN_NO_NEEDED
)))
2172 /* See if we already know about this version. */
2173 for (t
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
2177 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
2180 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2181 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
2187 /* This is a new version. Add it to tree we are building. */
2192 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
2195 rinfo
->failed
= TRUE
;
2199 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
2200 t
->vn_nextref
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
2201 elf_tdata (rinfo
->info
->output_bfd
)->verref
= t
;
2205 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
2208 rinfo
->failed
= TRUE
;
2212 /* Note that we are copying a string pointer here, and testing it
2213 above. If bfd_elf_string_from_elf_section is ever changed to
2214 discard the string data when low in memory, this will have to be
2216 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
2218 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
2219 a
->vna_nextptr
= t
->vn_auxptr
;
2221 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
2224 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
2231 /* Return TRUE and set *HIDE to TRUE if the versioned symbol is
2232 hidden. Set *T_P to NULL if there is no match. */
2235 _bfd_elf_link_hide_versioned_symbol (struct bfd_link_info
*info
,
2236 struct elf_link_hash_entry
*h
,
2237 const char *version_p
,
2238 struct bfd_elf_version_tree
**t_p
,
2241 struct bfd_elf_version_tree
*t
;
2243 /* Look for the version. If we find it, it is no longer weak. */
2244 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
2246 if (strcmp (t
->name
, version_p
) == 0)
2250 struct bfd_elf_version_expr
*d
;
2252 len
= version_p
- h
->root
.root
.string
;
2253 alc
= (char *) bfd_malloc (len
);
2256 memcpy (alc
, h
->root
.root
.string
, len
- 1);
2257 alc
[len
- 1] = '\0';
2258 if (alc
[len
- 2] == ELF_VER_CHR
)
2259 alc
[len
- 2] = '\0';
2261 h
->verinfo
.vertree
= t
;
2265 if (t
->globals
.list
!= NULL
)
2266 d
= (*t
->match
) (&t
->globals
, NULL
, alc
);
2268 /* See if there is anything to force this symbol to
2270 if (d
== NULL
&& t
->locals
.list
!= NULL
)
2272 d
= (*t
->match
) (&t
->locals
, NULL
, alc
);
2275 && ! info
->export_dynamic
)
2289 /* Return TRUE if the symbol H is hidden by version script. */
2292 _bfd_elf_link_hide_sym_by_version (struct bfd_link_info
*info
,
2293 struct elf_link_hash_entry
*h
)
2296 bfd_boolean hide
= FALSE
;
2297 const struct elf_backend_data
*bed
2298 = get_elf_backend_data (info
->output_bfd
);
2300 /* Version script only hides symbols defined in regular objects. */
2301 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2304 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
2305 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
2307 struct bfd_elf_version_tree
*t
;
2310 if (*p
== ELF_VER_CHR
)
2314 && _bfd_elf_link_hide_versioned_symbol (info
, h
, p
, &t
, &hide
)
2318 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2323 /* If we don't have a version for this symbol, see if we can find
2325 if (h
->verinfo
.vertree
== NULL
&& info
->version_info
!= NULL
)
2328 = bfd_find_version_for_sym (info
->version_info
,
2329 h
->root
.root
.string
, &hide
);
2330 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2332 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2340 /* Figure out appropriate versions for all the symbols. We may not
2341 have the version number script until we have read all of the input
2342 files, so until that point we don't know which symbols should be
2343 local. This function is called via elf_link_hash_traverse. */
2346 _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry
*h
, void *data
)
2348 struct elf_info_failed
*sinfo
;
2349 struct bfd_link_info
*info
;
2350 const struct elf_backend_data
*bed
;
2351 struct elf_info_failed eif
;
2355 sinfo
= (struct elf_info_failed
*) data
;
2358 /* Fix the symbol flags. */
2361 if (! _bfd_elf_fix_symbol_flags (h
, &eif
))
2364 sinfo
->failed
= TRUE
;
2368 bed
= get_elf_backend_data (info
->output_bfd
);
2370 /* We only need version numbers for symbols defined in regular
2372 if (!h
->def_regular
)
2374 /* Hide symbols defined in discarded input sections. */
2375 if ((h
->root
.type
== bfd_link_hash_defined
2376 || h
->root
.type
== bfd_link_hash_defweak
)
2377 && discarded_section (h
->root
.u
.def
.section
))
2378 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2383 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
2384 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
2386 struct bfd_elf_version_tree
*t
;
2389 if (*p
== ELF_VER_CHR
)
2392 /* If there is no version string, we can just return out. */
2396 if (!_bfd_elf_link_hide_versioned_symbol (info
, h
, p
, &t
, &hide
))
2398 sinfo
->failed
= TRUE
;
2403 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2405 /* If we are building an application, we need to create a
2406 version node for this version. */
2407 if (t
== NULL
&& bfd_link_executable (info
))
2409 struct bfd_elf_version_tree
**pp
;
2412 /* If we aren't going to export this symbol, we don't need
2413 to worry about it. */
2414 if (h
->dynindx
== -1)
2417 t
= (struct bfd_elf_version_tree
*) bfd_zalloc (info
->output_bfd
,
2421 sinfo
->failed
= TRUE
;
2426 t
->name_indx
= (unsigned int) -1;
2430 /* Don't count anonymous version tag. */
2431 if (sinfo
->info
->version_info
!= NULL
2432 && sinfo
->info
->version_info
->vernum
== 0)
2434 for (pp
= &sinfo
->info
->version_info
;
2438 t
->vernum
= version_index
;
2442 h
->verinfo
.vertree
= t
;
2446 /* We could not find the version for a symbol when
2447 generating a shared archive. Return an error. */
2449 /* xgettext:c-format */
2450 (_("%pB: version node not found for symbol %s"),
2451 info
->output_bfd
, h
->root
.root
.string
);
2452 bfd_set_error (bfd_error_bad_value
);
2453 sinfo
->failed
= TRUE
;
2458 /* If we don't have a version for this symbol, see if we can find
2461 && h
->verinfo
.vertree
== NULL
2462 && sinfo
->info
->version_info
!= NULL
)
2465 = bfd_find_version_for_sym (sinfo
->info
->version_info
,
2466 h
->root
.root
.string
, &hide
);
2467 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2468 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2474 /* Read and swap the relocs from the section indicated by SHDR. This
2475 may be either a REL or a RELA section. The relocations are
2476 translated into RELA relocations and stored in INTERNAL_RELOCS,
2477 which should have already been allocated to contain enough space.
2478 The EXTERNAL_RELOCS are a buffer where the external form of the
2479 relocations should be stored.
2481 Returns FALSE if something goes wrong. */
2484 elf_link_read_relocs_from_section (bfd
*abfd
,
2486 Elf_Internal_Shdr
*shdr
,
2487 void *external_relocs
,
2488 Elf_Internal_Rela
*internal_relocs
)
2490 const struct elf_backend_data
*bed
;
2491 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2492 const bfd_byte
*erela
;
2493 const bfd_byte
*erelaend
;
2494 Elf_Internal_Rela
*irela
;
2495 Elf_Internal_Shdr
*symtab_hdr
;
2498 /* Position ourselves at the start of the section. */
2499 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2502 /* Read the relocations. */
2503 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2506 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2507 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
2509 bed
= get_elf_backend_data (abfd
);
2511 /* Convert the external relocations to the internal format. */
2512 if (shdr
->sh_entsize
== bed
->s
->sizeof_rel
)
2513 swap_in
= bed
->s
->swap_reloc_in
;
2514 else if (shdr
->sh_entsize
== bed
->s
->sizeof_rela
)
2515 swap_in
= bed
->s
->swap_reloca_in
;
2518 bfd_set_error (bfd_error_wrong_format
);
2522 erela
= (const bfd_byte
*) external_relocs
;
2523 /* Setting erelaend like this and comparing with <= handles case of
2524 a fuzzed object with sh_size not a multiple of sh_entsize. */
2525 erelaend
= erela
+ shdr
->sh_size
- shdr
->sh_entsize
;
2526 irela
= internal_relocs
;
2527 while (erela
<= erelaend
)
2531 (*swap_in
) (abfd
, erela
, irela
);
2532 r_symndx
= ELF32_R_SYM (irela
->r_info
);
2533 if (bed
->s
->arch_size
== 64)
2537 if ((size_t) r_symndx
>= nsyms
)
2540 /* xgettext:c-format */
2541 (_("%pB: bad reloc symbol index (%#" PRIx64
" >= %#lx)"
2542 " for offset %#" PRIx64
" in section `%pA'"),
2543 abfd
, (uint64_t) r_symndx
, (unsigned long) nsyms
,
2544 (uint64_t) irela
->r_offset
, sec
);
2545 bfd_set_error (bfd_error_bad_value
);
2549 else if (r_symndx
!= STN_UNDEF
)
2552 /* xgettext:c-format */
2553 (_("%pB: non-zero symbol index (%#" PRIx64
")"
2554 " for offset %#" PRIx64
" in section `%pA'"
2555 " when the object file has no symbol table"),
2556 abfd
, (uint64_t) r_symndx
,
2557 (uint64_t) irela
->r_offset
, sec
);
2558 bfd_set_error (bfd_error_bad_value
);
2561 irela
+= bed
->s
->int_rels_per_ext_rel
;
2562 erela
+= shdr
->sh_entsize
;
2568 /* Read and swap the relocs for a section O. They may have been
2569 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2570 not NULL, they are used as buffers to read into. They are known to
2571 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2572 the return value is allocated using either malloc or bfd_alloc,
2573 according to the KEEP_MEMORY argument. If O has two relocation
2574 sections (both REL and RELA relocations), then the REL_HDR
2575 relocations will appear first in INTERNAL_RELOCS, followed by the
2576 RELA_HDR relocations. */
2579 _bfd_elf_link_read_relocs (bfd
*abfd
,
2581 void *external_relocs
,
2582 Elf_Internal_Rela
*internal_relocs
,
2583 bfd_boolean keep_memory
)
2585 void *alloc1
= NULL
;
2586 Elf_Internal_Rela
*alloc2
= NULL
;
2587 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2588 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
2589 Elf_Internal_Rela
*internal_rela_relocs
;
2591 if (esdo
->relocs
!= NULL
)
2592 return esdo
->relocs
;
2594 if (o
->reloc_count
== 0)
2597 if (internal_relocs
== NULL
)
2601 size
= (bfd_size_type
) o
->reloc_count
* sizeof (Elf_Internal_Rela
);
2603 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2605 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2606 if (internal_relocs
== NULL
)
2610 if (external_relocs
== NULL
)
2612 bfd_size_type size
= 0;
2615 size
+= esdo
->rel
.hdr
->sh_size
;
2617 size
+= esdo
->rela
.hdr
->sh_size
;
2619 alloc1
= bfd_malloc (size
);
2622 external_relocs
= alloc1
;
2625 internal_rela_relocs
= internal_relocs
;
2628 if (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rel
.hdr
,
2632 external_relocs
= (((bfd_byte
*) external_relocs
)
2633 + esdo
->rel
.hdr
->sh_size
);
2634 internal_rela_relocs
+= (NUM_SHDR_ENTRIES (esdo
->rel
.hdr
)
2635 * bed
->s
->int_rels_per_ext_rel
);
2639 && (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rela
.hdr
,
2641 internal_rela_relocs
)))
2644 /* Cache the results for next time, if we can. */
2646 esdo
->relocs
= internal_relocs
;
2651 /* Don't free alloc2, since if it was allocated we are passing it
2652 back (under the name of internal_relocs). */
2654 return internal_relocs
;
2662 bfd_release (abfd
, alloc2
);
2669 /* Compute the size of, and allocate space for, REL_HDR which is the
2670 section header for a section containing relocations for O. */
2673 _bfd_elf_link_size_reloc_section (bfd
*abfd
,
2674 struct bfd_elf_section_reloc_data
*reldata
)
2676 Elf_Internal_Shdr
*rel_hdr
= reldata
->hdr
;
2678 /* That allows us to calculate the size of the section. */
2679 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reldata
->count
;
2681 /* The contents field must last into write_object_contents, so we
2682 allocate it with bfd_alloc rather than malloc. Also since we
2683 cannot be sure that the contents will actually be filled in,
2684 we zero the allocated space. */
2685 rel_hdr
->contents
= (unsigned char *) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
2686 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
2689 if (reldata
->hashes
== NULL
&& reldata
->count
)
2691 struct elf_link_hash_entry
**p
;
2693 p
= ((struct elf_link_hash_entry
**)
2694 bfd_zmalloc (reldata
->count
* sizeof (*p
)));
2698 reldata
->hashes
= p
;
2704 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
2705 originated from the section given by INPUT_REL_HDR) to the
2709 _bfd_elf_link_output_relocs (bfd
*output_bfd
,
2710 asection
*input_section
,
2711 Elf_Internal_Shdr
*input_rel_hdr
,
2712 Elf_Internal_Rela
*internal_relocs
,
2713 struct elf_link_hash_entry
**rel_hash
2716 Elf_Internal_Rela
*irela
;
2717 Elf_Internal_Rela
*irelaend
;
2719 struct bfd_elf_section_reloc_data
*output_reldata
;
2720 asection
*output_section
;
2721 const struct elf_backend_data
*bed
;
2722 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2723 struct bfd_elf_section_data
*esdo
;
2725 output_section
= input_section
->output_section
;
2727 bed
= get_elf_backend_data (output_bfd
);
2728 esdo
= elf_section_data (output_section
);
2729 if (esdo
->rel
.hdr
&& esdo
->rel
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2731 output_reldata
= &esdo
->rel
;
2732 swap_out
= bed
->s
->swap_reloc_out
;
2734 else if (esdo
->rela
.hdr
2735 && esdo
->rela
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2737 output_reldata
= &esdo
->rela
;
2738 swap_out
= bed
->s
->swap_reloca_out
;
2743 /* xgettext:c-format */
2744 (_("%pB: relocation size mismatch in %pB section %pA"),
2745 output_bfd
, input_section
->owner
, input_section
);
2746 bfd_set_error (bfd_error_wrong_format
);
2750 erel
= output_reldata
->hdr
->contents
;
2751 erel
+= output_reldata
->count
* input_rel_hdr
->sh_entsize
;
2752 irela
= internal_relocs
;
2753 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
2754 * bed
->s
->int_rels_per_ext_rel
);
2755 while (irela
< irelaend
)
2757 (*swap_out
) (output_bfd
, irela
, erel
);
2758 irela
+= bed
->s
->int_rels_per_ext_rel
;
2759 erel
+= input_rel_hdr
->sh_entsize
;
2762 /* Bump the counter, so that we know where to add the next set of
2764 output_reldata
->count
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
2769 /* Make weak undefined symbols in PIE dynamic. */
2772 _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info
*info
,
2773 struct elf_link_hash_entry
*h
)
2775 if (bfd_link_pie (info
)
2777 && h
->root
.type
== bfd_link_hash_undefweak
)
2778 return bfd_elf_link_record_dynamic_symbol (info
, h
);
2783 /* Fix up the flags for a symbol. This handles various cases which
2784 can only be fixed after all the input files are seen. This is
2785 currently called by both adjust_dynamic_symbol and
2786 assign_sym_version, which is unnecessary but perhaps more robust in
2787 the face of future changes. */
2790 _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry
*h
,
2791 struct elf_info_failed
*eif
)
2793 const struct elf_backend_data
*bed
;
2795 /* If this symbol was mentioned in a non-ELF file, try to set
2796 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2797 permit a non-ELF file to correctly refer to a symbol defined in
2798 an ELF dynamic object. */
2801 while (h
->root
.type
== bfd_link_hash_indirect
)
2802 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2804 if (h
->root
.type
!= bfd_link_hash_defined
2805 && h
->root
.type
!= bfd_link_hash_defweak
)
2808 h
->ref_regular_nonweak
= 1;
2812 if (h
->root
.u
.def
.section
->owner
!= NULL
2813 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2814 == bfd_target_elf_flavour
))
2817 h
->ref_regular_nonweak
= 1;
2823 if (h
->dynindx
== -1
2827 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2836 /* Unfortunately, NON_ELF is only correct if the symbol
2837 was first seen in a non-ELF file. Fortunately, if the symbol
2838 was first seen in an ELF file, we're probably OK unless the
2839 symbol was defined in a non-ELF file. Catch that case here.
2840 FIXME: We're still in trouble if the symbol was first seen in
2841 a dynamic object, and then later in a non-ELF regular object. */
2842 if ((h
->root
.type
== bfd_link_hash_defined
2843 || h
->root
.type
== bfd_link_hash_defweak
)
2845 && (h
->root
.u
.def
.section
->owner
!= NULL
2846 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2847 != bfd_target_elf_flavour
)
2848 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
2849 && !h
->def_dynamic
)))
2853 /* Backend specific symbol fixup. */
2854 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
2855 if (bed
->elf_backend_fixup_symbol
2856 && !(*bed
->elf_backend_fixup_symbol
) (eif
->info
, h
))
2859 /* If this is a final link, and the symbol was defined as a common
2860 symbol in a regular object file, and there was no definition in
2861 any dynamic object, then the linker will have allocated space for
2862 the symbol in a common section but the DEF_REGULAR
2863 flag will not have been set. */
2864 if (h
->root
.type
== bfd_link_hash_defined
2868 && (h
->root
.u
.def
.section
->owner
->flags
& (DYNAMIC
| BFD_PLUGIN
)) == 0)
2871 /* Symbols defined in discarded sections shouldn't be dynamic. */
2872 if (h
->root
.type
== bfd_link_hash_undefined
&& h
->indx
== -3)
2873 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2875 /* If a weak undefined symbol has non-default visibility, we also
2876 hide it from the dynamic linker. */
2877 else if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2878 && h
->root
.type
== bfd_link_hash_undefweak
)
2879 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2881 /* A hidden versioned symbol in executable should be forced local if
2882 it is is locally defined, not referenced by shared library and not
2884 else if (bfd_link_executable (eif
->info
)
2885 && h
->versioned
== versioned_hidden
2886 && !eif
->info
->export_dynamic
2890 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2892 /* If -Bsymbolic was used (which means to bind references to global
2893 symbols to the definition within the shared object), and this
2894 symbol was defined in a regular object, then it actually doesn't
2895 need a PLT entry. Likewise, if the symbol has non-default
2896 visibility. If the symbol has hidden or internal visibility, we
2897 will force it local. */
2898 else if (h
->needs_plt
2899 && bfd_link_pic (eif
->info
)
2900 && is_elf_hash_table (eif
->info
->hash
)
2901 && (SYMBOLIC_BIND (eif
->info
, h
)
2902 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2905 bfd_boolean force_local
;
2907 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
2908 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
2909 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
2912 /* If this is a weak defined symbol in a dynamic object, and we know
2913 the real definition in the dynamic object, copy interesting flags
2914 over to the real definition. */
2915 if (h
->is_weakalias
)
2917 struct elf_link_hash_entry
*def
= weakdef (h
);
2919 /* If the real definition is defined by a regular object file,
2920 don't do anything special. See the longer description in
2921 _bfd_elf_adjust_dynamic_symbol, below. If the def is not
2922 bfd_link_hash_defined as it was when put on the alias list
2923 then it must have originally been a versioned symbol (for
2924 which a non-versioned indirect symbol is created) and later
2925 a definition for the non-versioned symbol is found. In that
2926 case the indirection is flipped with the versioned symbol
2927 becoming an indirect pointing at the non-versioned symbol.
2928 Thus, not an alias any more. */
2929 if (def
->def_regular
2930 || def
->root
.type
!= bfd_link_hash_defined
)
2933 while ((h
= h
->u
.alias
) != def
)
2934 h
->is_weakalias
= 0;
2938 while (h
->root
.type
== bfd_link_hash_indirect
)
2939 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2940 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2941 || h
->root
.type
== bfd_link_hash_defweak
);
2942 BFD_ASSERT (def
->def_dynamic
);
2943 (*bed
->elf_backend_copy_indirect_symbol
) (eif
->info
, def
, h
);
2950 /* Make the backend pick a good value for a dynamic symbol. This is
2951 called via elf_link_hash_traverse, and also calls itself
2955 _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry
*h
, void *data
)
2957 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2958 struct elf_link_hash_table
*htab
;
2959 const struct elf_backend_data
*bed
;
2961 if (! is_elf_hash_table (eif
->info
->hash
))
2964 /* Ignore indirect symbols. These are added by the versioning code. */
2965 if (h
->root
.type
== bfd_link_hash_indirect
)
2968 /* Fix the symbol flags. */
2969 if (! _bfd_elf_fix_symbol_flags (h
, eif
))
2972 htab
= elf_hash_table (eif
->info
);
2973 bed
= get_elf_backend_data (htab
->dynobj
);
2975 if (h
->root
.type
== bfd_link_hash_undefweak
)
2977 if (eif
->info
->dynamic_undefined_weak
== 0)
2978 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2979 else if (eif
->info
->dynamic_undefined_weak
> 0
2981 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2982 && !bfd_hide_sym_by_version (eif
->info
->version_info
,
2983 h
->root
.root
.string
))
2985 if (!bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2993 /* If this symbol does not require a PLT entry, and it is not
2994 defined by a dynamic object, or is not referenced by a regular
2995 object, ignore it. We do have to handle a weak defined symbol,
2996 even if no regular object refers to it, if we decided to add it
2997 to the dynamic symbol table. FIXME: Do we normally need to worry
2998 about symbols which are defined by one dynamic object and
2999 referenced by another one? */
3001 && h
->type
!= STT_GNU_IFUNC
3005 && (!h
->is_weakalias
|| weakdef (h
)->dynindx
== -1))))
3007 h
->plt
= elf_hash_table (eif
->info
)->init_plt_offset
;
3011 /* If we've already adjusted this symbol, don't do it again. This
3012 can happen via a recursive call. */
3013 if (h
->dynamic_adjusted
)
3016 /* Don't look at this symbol again. Note that we must set this
3017 after checking the above conditions, because we may look at a
3018 symbol once, decide not to do anything, and then get called
3019 recursively later after REF_REGULAR is set below. */
3020 h
->dynamic_adjusted
= 1;
3022 /* If this is a weak definition, and we know a real definition, and
3023 the real symbol is not itself defined by a regular object file,
3024 then get a good value for the real definition. We handle the
3025 real symbol first, for the convenience of the backend routine.
3027 Note that there is a confusing case here. If the real definition
3028 is defined by a regular object file, we don't get the real symbol
3029 from the dynamic object, but we do get the weak symbol. If the
3030 processor backend uses a COPY reloc, then if some routine in the
3031 dynamic object changes the real symbol, we will not see that
3032 change in the corresponding weak symbol. This is the way other
3033 ELF linkers work as well, and seems to be a result of the shared
3036 I will clarify this issue. Most SVR4 shared libraries define the
3037 variable _timezone and define timezone as a weak synonym. The
3038 tzset call changes _timezone. If you write
3039 extern int timezone;
3041 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
3042 you might expect that, since timezone is a synonym for _timezone,
3043 the same number will print both times. However, if the processor
3044 backend uses a COPY reloc, then actually timezone will be copied
3045 into your process image, and, since you define _timezone
3046 yourself, _timezone will not. Thus timezone and _timezone will
3047 wind up at different memory locations. The tzset call will set
3048 _timezone, leaving timezone unchanged. */
3050 if (h
->is_weakalias
)
3052 struct elf_link_hash_entry
*def
= weakdef (h
);
3054 /* If we get to this point, there is an implicit reference to
3055 the alias by a regular object file via the weak symbol H. */
3056 def
->ref_regular
= 1;
3058 /* Ensure that the backend adjust_dynamic_symbol function sees
3059 the strong alias before H by recursively calling ourselves. */
3060 if (!_bfd_elf_adjust_dynamic_symbol (def
, eif
))
3064 /* If a symbol has no type and no size and does not require a PLT
3065 entry, then we are probably about to do the wrong thing here: we
3066 are probably going to create a COPY reloc for an empty object.
3067 This case can arise when a shared object is built with assembly
3068 code, and the assembly code fails to set the symbol type. */
3070 && h
->type
== STT_NOTYPE
3073 (_("warning: type and size of dynamic symbol `%s' are not defined"),
3074 h
->root
.root
.string
);
3076 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
3085 /* Adjust the dynamic symbol, H, for copy in the dynamic bss section,
3089 _bfd_elf_adjust_dynamic_copy (struct bfd_link_info
*info
,
3090 struct elf_link_hash_entry
*h
,
3093 unsigned int power_of_two
;
3095 asection
*sec
= h
->root
.u
.def
.section
;
3097 /* The section alignment of the definition is the maximum alignment
3098 requirement of symbols defined in the section. Since we don't
3099 know the symbol alignment requirement, we start with the
3100 maximum alignment and check low bits of the symbol address
3101 for the minimum alignment. */
3102 power_of_two
= bfd_get_section_alignment (sec
->owner
, sec
);
3103 mask
= ((bfd_vma
) 1 << power_of_two
) - 1;
3104 while ((h
->root
.u
.def
.value
& mask
) != 0)
3110 if (power_of_two
> bfd_get_section_alignment (dynbss
->owner
,
3113 /* Adjust the section alignment if needed. */
3114 if (! bfd_set_section_alignment (dynbss
->owner
, dynbss
,
3119 /* We make sure that the symbol will be aligned properly. */
3120 dynbss
->size
= BFD_ALIGN (dynbss
->size
, mask
+ 1);
3122 /* Define the symbol as being at this point in DYNBSS. */
3123 h
->root
.u
.def
.section
= dynbss
;
3124 h
->root
.u
.def
.value
= dynbss
->size
;
3126 /* Increment the size of DYNBSS to make room for the symbol. */
3127 dynbss
->size
+= h
->size
;
3129 /* No error if extern_protected_data is true. */
3130 if (h
->protected_def
3131 && (!info
->extern_protected_data
3132 || (info
->extern_protected_data
< 0
3133 && !get_elf_backend_data (dynbss
->owner
)->extern_protected_data
)))
3134 info
->callbacks
->einfo
3135 (_("%P: copy reloc against protected `%pT' is dangerous\n"),
3136 h
->root
.root
.string
);
3141 /* Adjust all external symbols pointing into SEC_MERGE sections
3142 to reflect the object merging within the sections. */
3145 _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry
*h
, void *data
)
3149 if ((h
->root
.type
== bfd_link_hash_defined
3150 || h
->root
.type
== bfd_link_hash_defweak
)
3151 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
3152 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
3154 bfd
*output_bfd
= (bfd
*) data
;
3156 h
->root
.u
.def
.value
=
3157 _bfd_merged_section_offset (output_bfd
,
3158 &h
->root
.u
.def
.section
,
3159 elf_section_data (sec
)->sec_info
,
3160 h
->root
.u
.def
.value
);
3166 /* Returns false if the symbol referred to by H should be considered
3167 to resolve local to the current module, and true if it should be
3168 considered to bind dynamically. */
3171 _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
3172 struct bfd_link_info
*info
,
3173 bfd_boolean not_local_protected
)
3175 bfd_boolean binding_stays_local_p
;
3176 const struct elf_backend_data
*bed
;
3177 struct elf_link_hash_table
*hash_table
;
3182 while (h
->root
.type
== bfd_link_hash_indirect
3183 || h
->root
.type
== bfd_link_hash_warning
)
3184 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3186 /* If it was forced local, then clearly it's not dynamic. */
3187 if (h
->dynindx
== -1)
3189 if (h
->forced_local
)
3192 /* Identify the cases where name binding rules say that a
3193 visible symbol resolves locally. */
3194 binding_stays_local_p
= (bfd_link_executable (info
)
3195 || SYMBOLIC_BIND (info
, h
));
3197 switch (ELF_ST_VISIBILITY (h
->other
))
3204 hash_table
= elf_hash_table (info
);
3205 if (!is_elf_hash_table (hash_table
))
3208 bed
= get_elf_backend_data (hash_table
->dynobj
);
3210 /* Proper resolution for function pointer equality may require
3211 that these symbols perhaps be resolved dynamically, even though
3212 we should be resolving them to the current module. */
3213 if (!not_local_protected
|| !bed
->is_function_type (h
->type
))
3214 binding_stays_local_p
= TRUE
;
3221 /* If it isn't defined locally, then clearly it's dynamic. */
3222 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
3225 /* Otherwise, the symbol is dynamic if binding rules don't tell
3226 us that it remains local. */
3227 return !binding_stays_local_p
;
3230 /* Return true if the symbol referred to by H should be considered
3231 to resolve local to the current module, and false otherwise. Differs
3232 from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of
3233 undefined symbols. The two functions are virtually identical except
3234 for the place where dynindx == -1 is tested. If that test is true,
3235 _bfd_elf_dynamic_symbol_p will say the symbol is local, while
3236 _bfd_elf_symbol_refs_local_p will say the symbol is local only for
3238 It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as
3239 !_bfd_elf_symbol_refs_local_p, except that targets differ in their
3240 treatment of undefined weak symbols. For those that do not make
3241 undefined weak symbols dynamic, both functions may return false. */
3244 _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry
*h
,
3245 struct bfd_link_info
*info
,
3246 bfd_boolean local_protected
)
3248 const struct elf_backend_data
*bed
;
3249 struct elf_link_hash_table
*hash_table
;
3251 /* If it's a local sym, of course we resolve locally. */
3255 /* STV_HIDDEN or STV_INTERNAL ones must be local. */
3256 if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
3257 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
3260 /* Forced local symbols resolve locally. */
3261 if (h
->forced_local
)
3264 /* Common symbols that become definitions don't get the DEF_REGULAR
3265 flag set, so test it first, and don't bail out. */
3266 if (ELF_COMMON_DEF_P (h
))
3268 /* If we don't have a definition in a regular file, then we can't
3269 resolve locally. The sym is either undefined or dynamic. */
3270 else if (!h
->def_regular
)
3273 /* Non-dynamic symbols resolve locally. */
3274 if (h
->dynindx
== -1)
3277 /* At this point, we know the symbol is defined and dynamic. In an
3278 executable it must resolve locally, likewise when building symbolic
3279 shared libraries. */
3280 if (bfd_link_executable (info
) || SYMBOLIC_BIND (info
, h
))
3283 /* Now deal with defined dynamic symbols in shared libraries. Ones
3284 with default visibility might not resolve locally. */
3285 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3288 hash_table
= elf_hash_table (info
);
3289 if (!is_elf_hash_table (hash_table
))
3292 bed
= get_elf_backend_data (hash_table
->dynobj
);
3294 /* If extern_protected_data is false, STV_PROTECTED non-function
3295 symbols are local. */
3296 if ((!info
->extern_protected_data
3297 || (info
->extern_protected_data
< 0
3298 && !bed
->extern_protected_data
))
3299 && !bed
->is_function_type (h
->type
))
3302 /* Function pointer equality tests may require that STV_PROTECTED
3303 symbols be treated as dynamic symbols. If the address of a
3304 function not defined in an executable is set to that function's
3305 plt entry in the executable, then the address of the function in
3306 a shared library must also be the plt entry in the executable. */
3307 return local_protected
;
3310 /* Caches some TLS segment info, and ensures that the TLS segment vma is
3311 aligned. Returns the first TLS output section. */
3313 struct bfd_section
*
3314 _bfd_elf_tls_setup (bfd
*obfd
, struct bfd_link_info
*info
)
3316 struct bfd_section
*sec
, *tls
;
3317 unsigned int align
= 0;
3319 for (sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3320 if ((sec
->flags
& SEC_THREAD_LOCAL
) != 0)
3324 for (; sec
!= NULL
&& (sec
->flags
& SEC_THREAD_LOCAL
) != 0; sec
= sec
->next
)
3325 if (sec
->alignment_power
> align
)
3326 align
= sec
->alignment_power
;
3328 elf_hash_table (info
)->tls_sec
= tls
;
3330 /* Ensure the alignment of the first section is the largest alignment,
3331 so that the tls segment starts aligned. */
3333 tls
->alignment_power
= align
;
3338 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
3340 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
3341 Elf_Internal_Sym
*sym
)
3343 const struct elf_backend_data
*bed
;
3345 /* Local symbols do not count, but target specific ones might. */
3346 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
3347 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
3350 bed
= get_elf_backend_data (abfd
);
3351 /* Function symbols do not count. */
3352 if (bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)))
3355 /* If the section is undefined, then so is the symbol. */
3356 if (sym
->st_shndx
== SHN_UNDEF
)
3359 /* If the symbol is defined in the common section, then
3360 it is a common definition and so does not count. */
3361 if (bed
->common_definition (sym
))
3364 /* If the symbol is in a target specific section then we
3365 must rely upon the backend to tell us what it is. */
3366 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
3367 /* FIXME - this function is not coded yet:
3369 return _bfd_is_global_symbol_definition (abfd, sym);
3371 Instead for now assume that the definition is not global,
3372 Even if this is wrong, at least the linker will behave
3373 in the same way that it used to do. */
3379 /* Search the symbol table of the archive element of the archive ABFD
3380 whose archive map contains a mention of SYMDEF, and determine if
3381 the symbol is defined in this element. */
3383 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
3385 Elf_Internal_Shdr
* hdr
;
3389 Elf_Internal_Sym
*isymbuf
;
3390 Elf_Internal_Sym
*isym
;
3391 Elf_Internal_Sym
*isymend
;
3394 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
3398 if (! bfd_check_format (abfd
, bfd_object
))
3401 /* Select the appropriate symbol table. If we don't know if the
3402 object file is an IR object, give linker LTO plugin a chance to
3403 get the correct symbol table. */
3404 if (abfd
->plugin_format
== bfd_plugin_yes
3405 #if BFD_SUPPORTS_PLUGINS
3406 || (abfd
->plugin_format
== bfd_plugin_unknown
3407 && bfd_link_plugin_object_p (abfd
))
3411 /* Use the IR symbol table if the object has been claimed by
3413 abfd
= abfd
->plugin_dummy_bfd
;
3414 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3416 else if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
3417 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3419 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3421 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
3423 /* The sh_info field of the symtab header tells us where the
3424 external symbols start. We don't care about the local symbols. */
3425 if (elf_bad_symtab (abfd
))
3427 extsymcount
= symcount
;
3432 extsymcount
= symcount
- hdr
->sh_info
;
3433 extsymoff
= hdr
->sh_info
;
3436 if (extsymcount
== 0)
3439 /* Read in the symbol table. */
3440 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3442 if (isymbuf
== NULL
)
3445 /* Scan the symbol table looking for SYMDEF. */
3447 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
3451 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3456 if (strcmp (name
, symdef
->name
) == 0)
3458 result
= is_global_data_symbol_definition (abfd
, isym
);
3468 /* Add an entry to the .dynamic table. */
3471 _bfd_elf_add_dynamic_entry (struct bfd_link_info
*info
,
3475 struct elf_link_hash_table
*hash_table
;
3476 const struct elf_backend_data
*bed
;
3478 bfd_size_type newsize
;
3479 bfd_byte
*newcontents
;
3480 Elf_Internal_Dyn dyn
;
3482 hash_table
= elf_hash_table (info
);
3483 if (! is_elf_hash_table (hash_table
))
3486 if (tag
== DT_RELA
|| tag
== DT_REL
)
3487 hash_table
->dynamic_relocs
= TRUE
;
3489 bed
= get_elf_backend_data (hash_table
->dynobj
);
3490 s
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3491 BFD_ASSERT (s
!= NULL
);
3493 newsize
= s
->size
+ bed
->s
->sizeof_dyn
;
3494 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
3495 if (newcontents
== NULL
)
3499 dyn
.d_un
.d_val
= val
;
3500 bed
->s
->swap_dyn_out (hash_table
->dynobj
, &dyn
, newcontents
+ s
->size
);
3503 s
->contents
= newcontents
;
3508 /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true,
3509 otherwise just check whether one already exists. Returns -1 on error,
3510 1 if a DT_NEEDED tag already exists, and 0 on success. */
3513 elf_add_dt_needed_tag (bfd
*abfd
,
3514 struct bfd_link_info
*info
,
3518 struct elf_link_hash_table
*hash_table
;
3521 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
3524 hash_table
= elf_hash_table (info
);
3525 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, soname
, FALSE
);
3526 if (strindex
== (size_t) -1)
3529 if (_bfd_elf_strtab_refcount (hash_table
->dynstr
, strindex
) != 1)
3532 const struct elf_backend_data
*bed
;
3535 bed
= get_elf_backend_data (hash_table
->dynobj
);
3536 sdyn
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3538 for (extdyn
= sdyn
->contents
;
3539 extdyn
< sdyn
->contents
+ sdyn
->size
;
3540 extdyn
+= bed
->s
->sizeof_dyn
)
3542 Elf_Internal_Dyn dyn
;
3544 bed
->s
->swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3545 if (dyn
.d_tag
== DT_NEEDED
3546 && dyn
.d_un
.d_val
== strindex
)
3548 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3556 if (!_bfd_elf_link_create_dynamic_sections (hash_table
->dynobj
, info
))
3559 if (!_bfd_elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
3563 /* We were just checking for existence of the tag. */
3564 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3569 /* Return true if SONAME is on the needed list between NEEDED and STOP
3570 (or the end of list if STOP is NULL), and needed by a library that
3574 on_needed_list (const char *soname
,
3575 struct bfd_link_needed_list
*needed
,
3576 struct bfd_link_needed_list
*stop
)
3578 struct bfd_link_needed_list
*look
;
3579 for (look
= needed
; look
!= stop
; look
= look
->next
)
3580 if (strcmp (soname
, look
->name
) == 0
3581 && ((elf_dyn_lib_class (look
->by
) & DYN_AS_NEEDED
) == 0
3582 /* If needed by a library that itself is not directly
3583 needed, recursively check whether that library is
3584 indirectly needed. Since we add DT_NEEDED entries to
3585 the end of the list, library dependencies appear after
3586 the library. Therefore search prior to the current
3587 LOOK, preventing possible infinite recursion. */
3588 || on_needed_list (elf_dt_name (look
->by
), needed
, look
)))
3594 /* Sort symbol by value, section, and size. */
3596 elf_sort_symbol (const void *arg1
, const void *arg2
)
3598 const struct elf_link_hash_entry
*h1
;
3599 const struct elf_link_hash_entry
*h2
;
3600 bfd_signed_vma vdiff
;
3602 h1
= *(const struct elf_link_hash_entry
**) arg1
;
3603 h2
= *(const struct elf_link_hash_entry
**) arg2
;
3604 vdiff
= h1
->root
.u
.def
.value
- h2
->root
.u
.def
.value
;
3606 return vdiff
> 0 ? 1 : -1;
3609 int sdiff
= h1
->root
.u
.def
.section
->id
- h2
->root
.u
.def
.section
->id
;
3611 return sdiff
> 0 ? 1 : -1;
3613 vdiff
= h1
->size
- h2
->size
;
3614 return vdiff
== 0 ? 0 : vdiff
> 0 ? 1 : -1;
3617 /* This function is used to adjust offsets into .dynstr for
3618 dynamic symbols. This is called via elf_link_hash_traverse. */
3621 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
3623 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3625 if (h
->dynindx
!= -1)
3626 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3630 /* Assign string offsets in .dynstr, update all structures referencing
3634 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
3636 struct elf_link_hash_table
*hash_table
= elf_hash_table (info
);
3637 struct elf_link_local_dynamic_entry
*entry
;
3638 struct elf_strtab_hash
*dynstr
= hash_table
->dynstr
;
3639 bfd
*dynobj
= hash_table
->dynobj
;
3642 const struct elf_backend_data
*bed
;
3645 _bfd_elf_strtab_finalize (dynstr
);
3646 size
= _bfd_elf_strtab_size (dynstr
);
3648 bed
= get_elf_backend_data (dynobj
);
3649 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3650 BFD_ASSERT (sdyn
!= NULL
);
3652 /* Update all .dynamic entries referencing .dynstr strings. */
3653 for (extdyn
= sdyn
->contents
;
3654 extdyn
< sdyn
->contents
+ sdyn
->size
;
3655 extdyn
+= bed
->s
->sizeof_dyn
)
3657 Elf_Internal_Dyn dyn
;
3659 bed
->s
->swap_dyn_in (dynobj
, extdyn
, &dyn
);
3663 dyn
.d_un
.d_val
= size
;
3673 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3678 bed
->s
->swap_dyn_out (dynobj
, &dyn
, extdyn
);
3681 /* Now update local dynamic symbols. */
3682 for (entry
= hash_table
->dynlocal
; entry
; entry
= entry
->next
)
3683 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3684 entry
->isym
.st_name
);
3686 /* And the rest of dynamic symbols. */
3687 elf_link_hash_traverse (hash_table
, elf_adjust_dynstr_offsets
, dynstr
);
3689 /* Adjust version definitions. */
3690 if (elf_tdata (output_bfd
)->cverdefs
)
3695 Elf_Internal_Verdef def
;
3696 Elf_Internal_Verdaux defaux
;
3698 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
3702 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3704 p
+= sizeof (Elf_External_Verdef
);
3705 if (def
.vd_aux
!= sizeof (Elf_External_Verdef
))
3707 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3709 _bfd_elf_swap_verdaux_in (output_bfd
,
3710 (Elf_External_Verdaux
*) p
, &defaux
);
3711 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3713 _bfd_elf_swap_verdaux_out (output_bfd
,
3714 &defaux
, (Elf_External_Verdaux
*) p
);
3715 p
+= sizeof (Elf_External_Verdaux
);
3718 while (def
.vd_next
);
3721 /* Adjust version references. */
3722 if (elf_tdata (output_bfd
)->verref
)
3727 Elf_Internal_Verneed need
;
3728 Elf_Internal_Vernaux needaux
;
3730 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
3734 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3736 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3737 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3738 (Elf_External_Verneed
*) p
);
3739 p
+= sizeof (Elf_External_Verneed
);
3740 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3742 _bfd_elf_swap_vernaux_in (output_bfd
,
3743 (Elf_External_Vernaux
*) p
, &needaux
);
3744 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3746 _bfd_elf_swap_vernaux_out (output_bfd
,
3748 (Elf_External_Vernaux
*) p
);
3749 p
+= sizeof (Elf_External_Vernaux
);
3752 while (need
.vn_next
);
3758 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3759 The default is to only match when the INPUT and OUTPUT are exactly
3763 _bfd_elf_default_relocs_compatible (const bfd_target
*input
,
3764 const bfd_target
*output
)
3766 return input
== output
;
3769 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3770 This version is used when different targets for the same architecture
3771 are virtually identical. */
3774 _bfd_elf_relocs_compatible (const bfd_target
*input
,
3775 const bfd_target
*output
)
3777 const struct elf_backend_data
*obed
, *ibed
;
3779 if (input
== output
)
3782 ibed
= xvec_get_elf_backend_data (input
);
3783 obed
= xvec_get_elf_backend_data (output
);
3785 if (ibed
->arch
!= obed
->arch
)
3788 /* If both backends are using this function, deem them compatible. */
3789 return ibed
->relocs_compatible
== obed
->relocs_compatible
;
3792 /* Make a special call to the linker "notice" function to tell it that
3793 we are about to handle an as-needed lib, or have finished
3794 processing the lib. */
3797 _bfd_elf_notice_as_needed (bfd
*ibfd
,
3798 struct bfd_link_info
*info
,
3799 enum notice_asneeded_action act
)
3801 return (*info
->callbacks
->notice
) (info
, NULL
, NULL
, ibfd
, NULL
, act
, 0);
3804 /* Check relocations an ELF object file. */
3807 _bfd_elf_link_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
)
3809 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3810 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3812 /* If this object is the same format as the output object, and it is
3813 not a shared library, then let the backend look through the
3816 This is required to build global offset table entries and to
3817 arrange for dynamic relocs. It is not required for the
3818 particular common case of linking non PIC code, even when linking
3819 against shared libraries, but unfortunately there is no way of
3820 knowing whether an object file has been compiled PIC or not.
3821 Looking through the relocs is not particularly time consuming.
3822 The problem is that we must either (1) keep the relocs in memory,
3823 which causes the linker to require additional runtime memory or
3824 (2) read the relocs twice from the input file, which wastes time.
3825 This would be a good case for using mmap.
3827 I have no idea how to handle linking PIC code into a file of a
3828 different format. It probably can't be done. */
3829 if ((abfd
->flags
& DYNAMIC
) == 0
3830 && is_elf_hash_table (htab
)
3831 && bed
->check_relocs
!= NULL
3832 && elf_object_id (abfd
) == elf_hash_table_id (htab
)
3833 && (*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
3837 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3839 Elf_Internal_Rela
*internal_relocs
;
3842 /* Don't check relocations in excluded sections. */
3843 if ((o
->flags
& SEC_RELOC
) == 0
3844 || (o
->flags
& SEC_EXCLUDE
) != 0
3845 || o
->reloc_count
== 0
3846 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
3847 && (o
->flags
& SEC_DEBUGGING
) != 0)
3848 || bfd_is_abs_section (o
->output_section
))
3851 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
3853 if (internal_relocs
== NULL
)
3856 ok
= (*bed
->check_relocs
) (abfd
, info
, o
, internal_relocs
);
3858 if (elf_section_data (o
)->relocs
!= internal_relocs
)
3859 free (internal_relocs
);
3869 /* Add symbols from an ELF object file to the linker hash table. */
3872 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3874 Elf_Internal_Ehdr
*ehdr
;
3875 Elf_Internal_Shdr
*hdr
;
3879 struct elf_link_hash_entry
**sym_hash
;
3880 bfd_boolean dynamic
;
3881 Elf_External_Versym
*extversym
= NULL
;
3882 Elf_External_Versym
*extversym_end
= NULL
;
3883 Elf_External_Versym
*ever
;
3884 struct elf_link_hash_entry
*weaks
;
3885 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
3886 size_t nondeflt_vers_cnt
= 0;
3887 Elf_Internal_Sym
*isymbuf
= NULL
;
3888 Elf_Internal_Sym
*isym
;
3889 Elf_Internal_Sym
*isymend
;
3890 const struct elf_backend_data
*bed
;
3891 bfd_boolean add_needed
;
3892 struct elf_link_hash_table
*htab
;
3894 void *alloc_mark
= NULL
;
3895 struct bfd_hash_entry
**old_table
= NULL
;
3896 unsigned int old_size
= 0;
3897 unsigned int old_count
= 0;
3898 void *old_tab
= NULL
;
3900 struct bfd_link_hash_entry
*old_undefs
= NULL
;
3901 struct bfd_link_hash_entry
*old_undefs_tail
= NULL
;
3902 void *old_strtab
= NULL
;
3905 bfd_boolean just_syms
;
3907 htab
= elf_hash_table (info
);
3908 bed
= get_elf_backend_data (abfd
);
3910 if ((abfd
->flags
& DYNAMIC
) == 0)
3916 /* You can't use -r against a dynamic object. Also, there's no
3917 hope of using a dynamic object which does not exactly match
3918 the format of the output file. */
3919 if (bfd_link_relocatable (info
)
3920 || !is_elf_hash_table (htab
)
3921 || info
->output_bfd
->xvec
!= abfd
->xvec
)
3923 if (bfd_link_relocatable (info
))
3924 bfd_set_error (bfd_error_invalid_operation
);
3926 bfd_set_error (bfd_error_wrong_format
);
3931 ehdr
= elf_elfheader (abfd
);
3932 if (info
->warn_alternate_em
3933 && bed
->elf_machine_code
!= ehdr
->e_machine
3934 && ((bed
->elf_machine_alt1
!= 0
3935 && ehdr
->e_machine
== bed
->elf_machine_alt1
)
3936 || (bed
->elf_machine_alt2
!= 0
3937 && ehdr
->e_machine
== bed
->elf_machine_alt2
)))
3939 /* xgettext:c-format */
3940 (_("alternate ELF machine code found (%d) in %pB, expecting %d"),
3941 ehdr
->e_machine
, abfd
, bed
->elf_machine_code
);
3943 /* As a GNU extension, any input sections which are named
3944 .gnu.warning.SYMBOL are treated as warning symbols for the given
3945 symbol. This differs from .gnu.warning sections, which generate
3946 warnings when they are included in an output file. */
3947 /* PR 12761: Also generate this warning when building shared libraries. */
3948 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3952 name
= bfd_get_section_name (abfd
, s
);
3953 if (CONST_STRNEQ (name
, ".gnu.warning."))
3958 name
+= sizeof ".gnu.warning." - 1;
3960 /* If this is a shared object, then look up the symbol
3961 in the hash table. If it is there, and it is already
3962 been defined, then we will not be using the entry
3963 from this shared object, so we don't need to warn.
3964 FIXME: If we see the definition in a regular object
3965 later on, we will warn, but we shouldn't. The only
3966 fix is to keep track of what warnings we are supposed
3967 to emit, and then handle them all at the end of the
3971 struct elf_link_hash_entry
*h
;
3973 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
3975 /* FIXME: What about bfd_link_hash_common? */
3977 && (h
->root
.type
== bfd_link_hash_defined
3978 || h
->root
.type
== bfd_link_hash_defweak
))
3983 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
3987 if (! bfd_get_section_contents (abfd
, s
, msg
, 0, sz
))
3992 if (! (_bfd_generic_link_add_one_symbol
3993 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
3994 FALSE
, bed
->collect
, NULL
)))
3997 if (bfd_link_executable (info
))
3999 /* Clobber the section size so that the warning does
4000 not get copied into the output file. */
4003 /* Also set SEC_EXCLUDE, so that symbols defined in
4004 the warning section don't get copied to the output. */
4005 s
->flags
|= SEC_EXCLUDE
;
4010 just_syms
= ((s
= abfd
->sections
) != NULL
4011 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
);
4016 /* If we are creating a shared library, create all the dynamic
4017 sections immediately. We need to attach them to something,
4018 so we attach them to this BFD, provided it is the right
4019 format and is not from ld --just-symbols. Always create the
4020 dynamic sections for -E/--dynamic-list. FIXME: If there
4021 are no input BFD's of the same format as the output, we can't
4022 make a shared library. */
4024 && (bfd_link_pic (info
)
4025 || (!bfd_link_relocatable (info
)
4027 && (info
->export_dynamic
|| info
->dynamic
)))
4028 && is_elf_hash_table (htab
)
4029 && info
->output_bfd
->xvec
== abfd
->xvec
4030 && !htab
->dynamic_sections_created
)
4032 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
4036 else if (!is_elf_hash_table (htab
))
4040 const char *soname
= NULL
;
4042 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
4043 const Elf_Internal_Phdr
*phdr
;
4046 /* ld --just-symbols and dynamic objects don't mix very well.
4047 ld shouldn't allow it. */
4051 /* If this dynamic lib was specified on the command line with
4052 --as-needed in effect, then we don't want to add a DT_NEEDED
4053 tag unless the lib is actually used. Similary for libs brought
4054 in by another lib's DT_NEEDED. When --no-add-needed is used
4055 on a dynamic lib, we don't want to add a DT_NEEDED entry for
4056 any dynamic library in DT_NEEDED tags in the dynamic lib at
4058 add_needed
= (elf_dyn_lib_class (abfd
)
4059 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
4060 | DYN_NO_NEEDED
)) == 0;
4062 s
= bfd_get_section_by_name (abfd
, ".dynamic");
4067 unsigned int elfsec
;
4068 unsigned long shlink
;
4070 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
4077 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
4078 if (elfsec
== SHN_BAD
)
4079 goto error_free_dyn
;
4080 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
4082 for (extdyn
= dynbuf
;
4083 extdyn
<= dynbuf
+ s
->size
- bed
->s
->sizeof_dyn
;
4084 extdyn
+= bed
->s
->sizeof_dyn
)
4086 Elf_Internal_Dyn dyn
;
4088 bed
->s
->swap_dyn_in (abfd
, extdyn
, &dyn
);
4089 if (dyn
.d_tag
== DT_SONAME
)
4091 unsigned int tagv
= dyn
.d_un
.d_val
;
4092 soname
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4094 goto error_free_dyn
;
4096 if (dyn
.d_tag
== DT_NEEDED
)
4098 struct bfd_link_needed_list
*n
, **pn
;
4100 unsigned int tagv
= dyn
.d_un
.d_val
;
4102 amt
= sizeof (struct bfd_link_needed_list
);
4103 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
4104 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4105 if (n
== NULL
|| fnm
== NULL
)
4106 goto error_free_dyn
;
4107 amt
= strlen (fnm
) + 1;
4108 anm
= (char *) bfd_alloc (abfd
, amt
);
4110 goto error_free_dyn
;
4111 memcpy (anm
, fnm
, amt
);
4115 for (pn
= &htab
->needed
; *pn
!= NULL
; pn
= &(*pn
)->next
)
4119 if (dyn
.d_tag
== DT_RUNPATH
)
4121 struct bfd_link_needed_list
*n
, **pn
;
4123 unsigned int tagv
= dyn
.d_un
.d_val
;
4125 amt
= sizeof (struct bfd_link_needed_list
);
4126 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
4127 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4128 if (n
== NULL
|| fnm
== NULL
)
4129 goto error_free_dyn
;
4130 amt
= strlen (fnm
) + 1;
4131 anm
= (char *) bfd_alloc (abfd
, amt
);
4133 goto error_free_dyn
;
4134 memcpy (anm
, fnm
, amt
);
4138 for (pn
= & runpath
;
4144 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
4145 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
4147 struct bfd_link_needed_list
*n
, **pn
;
4149 unsigned int tagv
= dyn
.d_un
.d_val
;
4151 amt
= sizeof (struct bfd_link_needed_list
);
4152 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
4153 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4154 if (n
== NULL
|| fnm
== NULL
)
4155 goto error_free_dyn
;
4156 amt
= strlen (fnm
) + 1;
4157 anm
= (char *) bfd_alloc (abfd
, amt
);
4159 goto error_free_dyn
;
4160 memcpy (anm
, fnm
, amt
);
4170 if (dyn
.d_tag
== DT_AUDIT
)
4172 unsigned int tagv
= dyn
.d_un
.d_val
;
4173 audit
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4180 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
4181 frees all more recently bfd_alloc'd blocks as well. */
4187 struct bfd_link_needed_list
**pn
;
4188 for (pn
= &htab
->runpath
; *pn
!= NULL
; pn
= &(*pn
)->next
)
4193 /* If we have a PT_GNU_RELRO program header, mark as read-only
4194 all sections contained fully therein. This makes relro
4195 shared library sections appear as they will at run-time. */
4196 phdr
= elf_tdata (abfd
)->phdr
+ elf_elfheader (abfd
)->e_phnum
;
4197 while (phdr
-- > elf_tdata (abfd
)->phdr
)
4198 if (phdr
->p_type
== PT_GNU_RELRO
)
4200 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4201 if ((s
->flags
& SEC_ALLOC
) != 0
4202 && s
->vma
>= phdr
->p_vaddr
4203 && s
->vma
+ s
->size
<= phdr
->p_vaddr
+ phdr
->p_memsz
)
4204 s
->flags
|= SEC_READONLY
;
4208 /* We do not want to include any of the sections in a dynamic
4209 object in the output file. We hack by simply clobbering the
4210 list of sections in the BFD. This could be handled more
4211 cleanly by, say, a new section flag; the existing
4212 SEC_NEVER_LOAD flag is not the one we want, because that one
4213 still implies that the section takes up space in the output
4215 bfd_section_list_clear (abfd
);
4217 /* Find the name to use in a DT_NEEDED entry that refers to this
4218 object. If the object has a DT_SONAME entry, we use it.
4219 Otherwise, if the generic linker stuck something in
4220 elf_dt_name, we use that. Otherwise, we just use the file
4222 if (soname
== NULL
|| *soname
== '\0')
4224 soname
= elf_dt_name (abfd
);
4225 if (soname
== NULL
|| *soname
== '\0')
4226 soname
= bfd_get_filename (abfd
);
4229 /* Save the SONAME because sometimes the linker emulation code
4230 will need to know it. */
4231 elf_dt_name (abfd
) = soname
;
4233 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
4237 /* If we have already included this dynamic object in the
4238 link, just ignore it. There is no reason to include a
4239 particular dynamic object more than once. */
4243 /* Save the DT_AUDIT entry for the linker emulation code. */
4244 elf_dt_audit (abfd
) = audit
;
4247 /* If this is a dynamic object, we always link against the .dynsym
4248 symbol table, not the .symtab symbol table. The dynamic linker
4249 will only see the .dynsym symbol table, so there is no reason to
4250 look at .symtab for a dynamic object. */
4252 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
4253 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4255 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4257 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
4259 /* The sh_info field of the symtab header tells us where the
4260 external symbols start. We don't care about the local symbols at
4262 if (elf_bad_symtab (abfd
))
4264 extsymcount
= symcount
;
4269 extsymcount
= symcount
- hdr
->sh_info
;
4270 extsymoff
= hdr
->sh_info
;
4273 sym_hash
= elf_sym_hashes (abfd
);
4274 if (extsymcount
!= 0)
4276 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
4278 if (isymbuf
== NULL
)
4281 if (sym_hash
== NULL
)
4283 /* We store a pointer to the hash table entry for each
4286 amt
*= sizeof (struct elf_link_hash_entry
*);
4287 sym_hash
= (struct elf_link_hash_entry
**) bfd_zalloc (abfd
, amt
);
4288 if (sym_hash
== NULL
)
4289 goto error_free_sym
;
4290 elf_sym_hashes (abfd
) = sym_hash
;
4296 /* Read in any version definitions. */
4297 if (!_bfd_elf_slurp_version_tables (abfd
,
4298 info
->default_imported_symver
))
4299 goto error_free_sym
;
4301 /* Read in the symbol versions, but don't bother to convert them
4302 to internal format. */
4303 if (elf_dynversym (abfd
) != 0)
4305 Elf_Internal_Shdr
*versymhdr
;
4307 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
4308 amt
= versymhdr
->sh_size
;
4309 extversym
= (Elf_External_Versym
*) bfd_malloc (amt
);
4310 if (extversym
== NULL
)
4311 goto error_free_sym
;
4312 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
4313 || bfd_bread (extversym
, amt
, abfd
) != amt
)
4314 goto error_free_vers
;
4315 extversym_end
= extversym
+ (amt
/ sizeof (* extversym
));
4319 /* If we are loading an as-needed shared lib, save the symbol table
4320 state before we start adding symbols. If the lib turns out
4321 to be unneeded, restore the state. */
4322 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4327 for (entsize
= 0, i
= 0; i
< htab
->root
.table
.size
; i
++)
4329 struct bfd_hash_entry
*p
;
4330 struct elf_link_hash_entry
*h
;
4332 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4334 h
= (struct elf_link_hash_entry
*) p
;
4335 entsize
+= htab
->root
.table
.entsize
;
4336 if (h
->root
.type
== bfd_link_hash_warning
)
4337 entsize
+= htab
->root
.table
.entsize
;
4341 tabsize
= htab
->root
.table
.size
* sizeof (struct bfd_hash_entry
*);
4342 old_tab
= bfd_malloc (tabsize
+ entsize
);
4343 if (old_tab
== NULL
)
4344 goto error_free_vers
;
4346 /* Remember the current objalloc pointer, so that all mem for
4347 symbols added can later be reclaimed. */
4348 alloc_mark
= bfd_hash_allocate (&htab
->root
.table
, 1);
4349 if (alloc_mark
== NULL
)
4350 goto error_free_vers
;
4352 /* Make a special call to the linker "notice" function to
4353 tell it that we are about to handle an as-needed lib. */
4354 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_as_needed
))
4355 goto error_free_vers
;
4357 /* Clone the symbol table. Remember some pointers into the
4358 symbol table, and dynamic symbol count. */
4359 old_ent
= (char *) old_tab
+ tabsize
;
4360 memcpy (old_tab
, htab
->root
.table
.table
, tabsize
);
4361 old_undefs
= htab
->root
.undefs
;
4362 old_undefs_tail
= htab
->root
.undefs_tail
;
4363 old_table
= htab
->root
.table
.table
;
4364 old_size
= htab
->root
.table
.size
;
4365 old_count
= htab
->root
.table
.count
;
4366 old_strtab
= _bfd_elf_strtab_save (htab
->dynstr
);
4367 if (old_strtab
== NULL
)
4368 goto error_free_vers
;
4370 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4372 struct bfd_hash_entry
*p
;
4373 struct elf_link_hash_entry
*h
;
4375 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4377 memcpy (old_ent
, p
, htab
->root
.table
.entsize
);
4378 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4379 h
= (struct elf_link_hash_entry
*) p
;
4380 if (h
->root
.type
== bfd_link_hash_warning
)
4382 memcpy (old_ent
, h
->root
.u
.i
.link
, htab
->root
.table
.entsize
);
4383 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4390 if (extversym
== NULL
)
4392 else if (extversym
+ extsymoff
< extversym_end
)
4393 ever
= extversym
+ extsymoff
;
4396 /* xgettext:c-format */
4397 _bfd_error_handler (_("%pB: invalid version offset %lx (max %lx)"),
4398 abfd
, (long) extsymoff
,
4399 (long) (extversym_end
- extversym
) / sizeof (* extversym
));
4400 bfd_set_error (bfd_error_bad_value
);
4401 goto error_free_vers
;
4404 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
4406 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
4410 asection
*sec
, *new_sec
;
4413 struct elf_link_hash_entry
*h
;
4414 struct elf_link_hash_entry
*hi
;
4415 bfd_boolean definition
;
4416 bfd_boolean size_change_ok
;
4417 bfd_boolean type_change_ok
;
4418 bfd_boolean new_weak
;
4419 bfd_boolean old_weak
;
4420 bfd_boolean override
;
4422 bfd_boolean discarded
;
4423 unsigned int old_alignment
;
4425 bfd_boolean matched
;
4429 flags
= BSF_NO_FLAGS
;
4431 value
= isym
->st_value
;
4432 common
= bed
->common_definition (isym
);
4433 if (common
&& info
->inhibit_common_definition
)
4435 /* Treat common symbol as undefined for --no-define-common. */
4436 isym
->st_shndx
= SHN_UNDEF
;
4441 bind
= ELF_ST_BIND (isym
->st_info
);
4445 /* This should be impossible, since ELF requires that all
4446 global symbols follow all local symbols, and that sh_info
4447 point to the first global symbol. Unfortunately, Irix 5
4449 if (elf_bad_symtab (abfd
))
4452 /* If we aren't prepared to handle locals within the globals
4453 then we'll likely segfault on a NULL section. */
4454 bfd_set_error (bfd_error_bad_value
);
4455 goto error_free_vers
;
4458 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
4466 case STB_GNU_UNIQUE
:
4467 flags
= BSF_GNU_UNIQUE
;
4471 /* Leave it up to the processor backend. */
4475 if (isym
->st_shndx
== SHN_UNDEF
)
4476 sec
= bfd_und_section_ptr
;
4477 else if (isym
->st_shndx
== SHN_ABS
)
4478 sec
= bfd_abs_section_ptr
;
4479 else if (isym
->st_shndx
== SHN_COMMON
)
4481 sec
= bfd_com_section_ptr
;
4482 /* What ELF calls the size we call the value. What ELF
4483 calls the value we call the alignment. */
4484 value
= isym
->st_size
;
4488 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4490 sec
= bfd_abs_section_ptr
;
4491 else if (discarded_section (sec
))
4493 /* Symbols from discarded section are undefined. We keep
4495 sec
= bfd_und_section_ptr
;
4497 isym
->st_shndx
= SHN_UNDEF
;
4499 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
4503 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4506 goto error_free_vers
;
4508 if (isym
->st_shndx
== SHN_COMMON
4509 && (abfd
->flags
& BFD_PLUGIN
) != 0)
4511 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
4515 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
4517 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
4519 goto error_free_vers
;
4523 else if (isym
->st_shndx
== SHN_COMMON
4524 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4525 && !bfd_link_relocatable (info
))
4527 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
4531 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
4532 | SEC_LINKER_CREATED
);
4533 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
4535 goto error_free_vers
;
4539 else if (bed
->elf_add_symbol_hook
)
4541 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
4543 goto error_free_vers
;
4545 /* The hook function sets the name to NULL if this symbol
4546 should be skipped for some reason. */
4551 /* Sanity check that all possibilities were handled. */
4554 bfd_set_error (bfd_error_bad_value
);
4555 goto error_free_vers
;
4558 /* Silently discard TLS symbols from --just-syms. There's
4559 no way to combine a static TLS block with a new TLS block
4560 for this executable. */
4561 if (ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4562 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
4565 if (bfd_is_und_section (sec
)
4566 || bfd_is_com_section (sec
))
4571 size_change_ok
= FALSE
;
4572 type_change_ok
= bed
->type_change_ok
;
4579 if (is_elf_hash_table (htab
))
4581 Elf_Internal_Versym iver
;
4582 unsigned int vernum
= 0;
4587 if (info
->default_imported_symver
)
4588 /* Use the default symbol version created earlier. */
4589 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
4593 else if (ever
>= extversym_end
)
4595 /* xgettext:c-format */
4596 _bfd_error_handler (_("%pB: not enough version information"),
4598 bfd_set_error (bfd_error_bad_value
);
4599 goto error_free_vers
;
4602 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
4604 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
4606 /* If this is a hidden symbol, or if it is not version
4607 1, we append the version name to the symbol name.
4608 However, we do not modify a non-hidden absolute symbol
4609 if it is not a function, because it might be the version
4610 symbol itself. FIXME: What if it isn't? */
4611 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
4613 && (!bfd_is_abs_section (sec
)
4614 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4617 size_t namelen
, verlen
, newlen
;
4620 if (isym
->st_shndx
!= SHN_UNDEF
)
4622 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4624 else if (vernum
> 1)
4626 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4633 /* xgettext:c-format */
4634 (_("%pB: %s: invalid version %u (max %d)"),
4636 elf_tdata (abfd
)->cverdefs
);
4637 bfd_set_error (bfd_error_bad_value
);
4638 goto error_free_vers
;
4643 /* We cannot simply test for the number of
4644 entries in the VERNEED section since the
4645 numbers for the needed versions do not start
4647 Elf_Internal_Verneed
*t
;
4650 for (t
= elf_tdata (abfd
)->verref
;
4654 Elf_Internal_Vernaux
*a
;
4656 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4658 if (a
->vna_other
== vernum
)
4660 verstr
= a
->vna_nodename
;
4670 /* xgettext:c-format */
4671 (_("%pB: %s: invalid needed version %d"),
4672 abfd
, name
, vernum
);
4673 bfd_set_error (bfd_error_bad_value
);
4674 goto error_free_vers
;
4678 namelen
= strlen (name
);
4679 verlen
= strlen (verstr
);
4680 newlen
= namelen
+ verlen
+ 2;
4681 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4682 && isym
->st_shndx
!= SHN_UNDEF
)
4685 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4686 if (newname
== NULL
)
4687 goto error_free_vers
;
4688 memcpy (newname
, name
, namelen
);
4689 p
= newname
+ namelen
;
4691 /* If this is a defined non-hidden version symbol,
4692 we add another @ to the name. This indicates the
4693 default version of the symbol. */
4694 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4695 && isym
->st_shndx
!= SHN_UNDEF
)
4697 memcpy (p
, verstr
, verlen
+ 1);
4702 /* If this symbol has default visibility and the user has
4703 requested we not re-export it, then mark it as hidden. */
4704 if (!bfd_is_und_section (sec
)
4707 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_INTERNAL
)
4708 isym
->st_other
= (STV_HIDDEN
4709 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
4711 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
4712 sym_hash
, &old_bfd
, &old_weak
,
4713 &old_alignment
, &skip
, &override
,
4714 &type_change_ok
, &size_change_ok
,
4716 goto error_free_vers
;
4721 /* Override a definition only if the new symbol matches the
4723 if (override
&& matched
)
4727 while (h
->root
.type
== bfd_link_hash_indirect
4728 || h
->root
.type
== bfd_link_hash_warning
)
4729 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4731 if (elf_tdata (abfd
)->verdef
!= NULL
4734 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4737 if (! (_bfd_generic_link_add_one_symbol
4738 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, bed
->collect
,
4739 (struct bfd_link_hash_entry
**) sym_hash
)))
4740 goto error_free_vers
;
4742 if ((abfd
->flags
& DYNAMIC
) == 0
4743 && (bfd_get_flavour (info
->output_bfd
)
4744 == bfd_target_elf_flavour
))
4746 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
4747 elf_tdata (info
->output_bfd
)->has_gnu_symbols
4748 |= elf_gnu_symbol_ifunc
;
4749 if ((flags
& BSF_GNU_UNIQUE
))
4750 elf_tdata (info
->output_bfd
)->has_gnu_symbols
4751 |= elf_gnu_symbol_unique
;
4755 /* We need to make sure that indirect symbol dynamic flags are
4758 while (h
->root
.type
== bfd_link_hash_indirect
4759 || h
->root
.type
== bfd_link_hash_warning
)
4760 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4762 /* Setting the index to -3 tells elf_link_output_extsym that
4763 this symbol is defined in a discarded section. */
4769 new_weak
= (flags
& BSF_WEAK
) != 0;
4773 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4774 && is_elf_hash_table (htab
)
4775 && h
->u
.alias
== NULL
)
4777 /* Keep a list of all weak defined non function symbols from
4778 a dynamic object, using the alias field. Later in this
4779 function we will set the alias field to the correct
4780 value. We only put non-function symbols from dynamic
4781 objects on this list, because that happens to be the only
4782 time we need to know the normal symbol corresponding to a
4783 weak symbol, and the information is time consuming to
4784 figure out. If the alias field is not already NULL,
4785 then this symbol was already defined by some previous
4786 dynamic object, and we will be using that previous
4787 definition anyhow. */
4793 /* Set the alignment of a common symbol. */
4794 if ((common
|| bfd_is_com_section (sec
))
4795 && h
->root
.type
== bfd_link_hash_common
)
4800 align
= bfd_log2 (isym
->st_value
);
4803 /* The new symbol is a common symbol in a shared object.
4804 We need to get the alignment from the section. */
4805 align
= new_sec
->alignment_power
;
4807 if (align
> old_alignment
)
4808 h
->root
.u
.c
.p
->alignment_power
= align
;
4810 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
4813 if (is_elf_hash_table (htab
))
4815 /* Set a flag in the hash table entry indicating the type of
4816 reference or definition we just found. A dynamic symbol
4817 is one which is referenced or defined by both a regular
4818 object and a shared object. */
4819 bfd_boolean dynsym
= FALSE
;
4821 /* Plugin symbols aren't normal. Don't set def_regular or
4822 ref_regular for them, or make them dynamic. */
4823 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4830 if (bind
!= STB_WEAK
)
4831 h
->ref_regular_nonweak
= 1;
4843 /* If the indirect symbol has been forced local, don't
4844 make the real symbol dynamic. */
4845 if ((h
== hi
|| !hi
->forced_local
)
4846 && (bfd_link_dll (info
)
4856 hi
->ref_dynamic
= 1;
4861 hi
->def_dynamic
= 1;
4864 /* If the indirect symbol has been forced local, don't
4865 make the real symbol dynamic. */
4866 if ((h
== hi
|| !hi
->forced_local
)
4870 && weakdef (h
)->dynindx
!= -1)))
4874 /* Check to see if we need to add an indirect symbol for
4875 the default name. */
4877 || (!override
&& h
->root
.type
== bfd_link_hash_common
))
4878 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
4879 sec
, value
, &old_bfd
, &dynsym
))
4880 goto error_free_vers
;
4882 /* Check the alignment when a common symbol is involved. This
4883 can change when a common symbol is overridden by a normal
4884 definition or a common symbol is ignored due to the old
4885 normal definition. We need to make sure the maximum
4886 alignment is maintained. */
4887 if ((old_alignment
|| common
)
4888 && h
->root
.type
!= bfd_link_hash_common
)
4890 unsigned int common_align
;
4891 unsigned int normal_align
;
4892 unsigned int symbol_align
;
4896 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
4897 || h
->root
.type
== bfd_link_hash_defweak
);
4899 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
4900 if (h
->root
.u
.def
.section
->owner
!= NULL
4901 && (h
->root
.u
.def
.section
->owner
->flags
4902 & (DYNAMIC
| BFD_PLUGIN
)) == 0)
4904 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
4905 if (normal_align
> symbol_align
)
4906 normal_align
= symbol_align
;
4909 normal_align
= symbol_align
;
4913 common_align
= old_alignment
;
4914 common_bfd
= old_bfd
;
4919 common_align
= bfd_log2 (isym
->st_value
);
4921 normal_bfd
= old_bfd
;
4924 if (normal_align
< common_align
)
4926 /* PR binutils/2735 */
4927 if (normal_bfd
== NULL
)
4929 /* xgettext:c-format */
4930 (_("warning: alignment %u of common symbol `%s' in %pB is"
4931 " greater than the alignment (%u) of its section %pA"),
4932 1 << common_align
, name
, common_bfd
,
4933 1 << normal_align
, h
->root
.u
.def
.section
);
4936 /* xgettext:c-format */
4937 (_("warning: alignment %u of symbol `%s' in %pB"
4938 " is smaller than %u in %pB"),
4939 1 << normal_align
, name
, normal_bfd
,
4940 1 << common_align
, common_bfd
);
4944 /* Remember the symbol size if it isn't undefined. */
4945 if (isym
->st_size
!= 0
4946 && isym
->st_shndx
!= SHN_UNDEF
4947 && (definition
|| h
->size
== 0))
4950 && h
->size
!= isym
->st_size
4951 && ! size_change_ok
)
4953 /* xgettext:c-format */
4954 (_("warning: size of symbol `%s' changed"
4955 " from %" PRIu64
" in %pB to %" PRIu64
" in %pB"),
4956 name
, (uint64_t) h
->size
, old_bfd
,
4957 (uint64_t) isym
->st_size
, abfd
);
4959 h
->size
= isym
->st_size
;
4962 /* If this is a common symbol, then we always want H->SIZE
4963 to be the size of the common symbol. The code just above
4964 won't fix the size if a common symbol becomes larger. We
4965 don't warn about a size change here, because that is
4966 covered by --warn-common. Allow changes between different
4968 if (h
->root
.type
== bfd_link_hash_common
)
4969 h
->size
= h
->root
.u
.c
.size
;
4971 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
4972 && ((definition
&& !new_weak
)
4973 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
4974 || h
->type
== STT_NOTYPE
))
4976 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
4978 /* Turn an IFUNC symbol from a DSO into a normal FUNC
4980 if (type
== STT_GNU_IFUNC
4981 && (abfd
->flags
& DYNAMIC
) != 0)
4984 if (h
->type
!= type
)
4986 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
4987 /* xgettext:c-format */
4989 (_("warning: type of symbol `%s' changed"
4990 " from %d to %d in %pB"),
4991 name
, h
->type
, type
, abfd
);
4997 /* Merge st_other field. */
4998 elf_merge_st_other (abfd
, h
, isym
, sec
, definition
, dynamic
);
5000 /* We don't want to make debug symbol dynamic. */
5002 && (sec
->flags
& SEC_DEBUGGING
)
5003 && !bfd_link_relocatable (info
))
5006 /* Nor should we make plugin symbols dynamic. */
5007 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
5012 h
->target_internal
= isym
->st_target_internal
;
5013 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
5016 if (definition
&& !dynamic
)
5018 char *p
= strchr (name
, ELF_VER_CHR
);
5019 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
5021 /* Queue non-default versions so that .symver x, x@FOO
5022 aliases can be checked. */
5025 amt
= ((isymend
- isym
+ 1)
5026 * sizeof (struct elf_link_hash_entry
*));
5028 = (struct elf_link_hash_entry
**) bfd_malloc (amt
);
5030 goto error_free_vers
;
5032 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
5036 if (dynsym
&& h
->dynindx
== -1)
5038 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
5039 goto error_free_vers
;
5041 && weakdef (h
)->dynindx
== -1)
5043 if (!bfd_elf_link_record_dynamic_symbol (info
, weakdef (h
)))
5044 goto error_free_vers
;
5047 else if (h
->dynindx
!= -1)
5048 /* If the symbol already has a dynamic index, but
5049 visibility says it should not be visible, turn it into
5051 switch (ELF_ST_VISIBILITY (h
->other
))
5055 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
5060 /* Don't add DT_NEEDED for references from the dummy bfd nor
5061 for unmatched symbol. */
5066 && h
->ref_regular_nonweak
5068 || (old_bfd
->flags
& BFD_PLUGIN
) == 0))
5069 || (h
->ref_dynamic_nonweak
5070 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
5071 && !on_needed_list (elf_dt_name (abfd
),
5072 htab
->needed
, NULL
))))
5075 const char *soname
= elf_dt_name (abfd
);
5077 info
->callbacks
->minfo ("%!", soname
, old_bfd
,
5078 h
->root
.root
.string
);
5080 /* A symbol from a library loaded via DT_NEEDED of some
5081 other library is referenced by a regular object.
5082 Add a DT_NEEDED entry for it. Issue an error if
5083 --no-add-needed is used and the reference was not
5086 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
5089 /* xgettext:c-format */
5090 (_("%pB: undefined reference to symbol '%s'"),
5092 bfd_set_error (bfd_error_missing_dso
);
5093 goto error_free_vers
;
5096 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
5097 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
5100 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
5102 goto error_free_vers
;
5104 BFD_ASSERT (ret
== 0);
5109 if (info
->lto_plugin_active
5110 && !bfd_link_relocatable (info
)
5111 && (abfd
->flags
& BFD_PLUGIN
) == 0
5117 if (bed
->s
->arch_size
== 32)
5122 /* If linker plugin is enabled, set non_ir_ref_regular on symbols
5123 referenced in regular objects so that linker plugin will get
5124 the correct symbol resolution. */
5126 sym_hash
= elf_sym_hashes (abfd
);
5127 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5129 Elf_Internal_Rela
*internal_relocs
;
5130 Elf_Internal_Rela
*rel
, *relend
;
5132 /* Don't check relocations in excluded sections. */
5133 if ((s
->flags
& SEC_RELOC
) == 0
5134 || s
->reloc_count
== 0
5135 || (s
->flags
& SEC_EXCLUDE
) != 0
5136 || ((info
->strip
== strip_all
5137 || info
->strip
== strip_debugger
)
5138 && (s
->flags
& SEC_DEBUGGING
) != 0))
5141 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, s
, NULL
,
5144 if (internal_relocs
== NULL
)
5145 goto error_free_vers
;
5147 rel
= internal_relocs
;
5148 relend
= rel
+ s
->reloc_count
;
5149 for ( ; rel
< relend
; rel
++)
5151 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
5152 struct elf_link_hash_entry
*h
;
5154 /* Skip local symbols. */
5155 if (r_symndx
< extsymoff
)
5158 h
= sym_hash
[r_symndx
- extsymoff
];
5160 h
->root
.non_ir_ref_regular
= 1;
5163 if (elf_section_data (s
)->relocs
!= internal_relocs
)
5164 free (internal_relocs
);
5168 if (extversym
!= NULL
)
5174 if (isymbuf
!= NULL
)
5180 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
5184 /* Restore the symbol table. */
5185 old_ent
= (char *) old_tab
+ tabsize
;
5186 memset (elf_sym_hashes (abfd
), 0,
5187 extsymcount
* sizeof (struct elf_link_hash_entry
*));
5188 htab
->root
.table
.table
= old_table
;
5189 htab
->root
.table
.size
= old_size
;
5190 htab
->root
.table
.count
= old_count
;
5191 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
5192 htab
->root
.undefs
= old_undefs
;
5193 htab
->root
.undefs_tail
= old_undefs_tail
;
5194 _bfd_elf_strtab_restore (htab
->dynstr
, old_strtab
);
5197 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
5199 struct bfd_hash_entry
*p
;
5200 struct elf_link_hash_entry
*h
;
5202 unsigned int alignment_power
;
5203 unsigned int non_ir_ref_dynamic
;
5205 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
5207 h
= (struct elf_link_hash_entry
*) p
;
5208 if (h
->root
.type
== bfd_link_hash_warning
)
5209 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5211 /* Preserve the maximum alignment and size for common
5212 symbols even if this dynamic lib isn't on DT_NEEDED
5213 since it can still be loaded at run time by another
5215 if (h
->root
.type
== bfd_link_hash_common
)
5217 size
= h
->root
.u
.c
.size
;
5218 alignment_power
= h
->root
.u
.c
.p
->alignment_power
;
5223 alignment_power
= 0;
5225 /* Preserve non_ir_ref_dynamic so that this symbol
5226 will be exported when the dynamic lib becomes needed
5227 in the second pass. */
5228 non_ir_ref_dynamic
= h
->root
.non_ir_ref_dynamic
;
5229 memcpy (p
, old_ent
, htab
->root
.table
.entsize
);
5230 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
5231 h
= (struct elf_link_hash_entry
*) p
;
5232 if (h
->root
.type
== bfd_link_hash_warning
)
5234 memcpy (h
->root
.u
.i
.link
, old_ent
, htab
->root
.table
.entsize
);
5235 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
5236 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5238 if (h
->root
.type
== bfd_link_hash_common
)
5240 if (size
> h
->root
.u
.c
.size
)
5241 h
->root
.u
.c
.size
= size
;
5242 if (alignment_power
> h
->root
.u
.c
.p
->alignment_power
)
5243 h
->root
.u
.c
.p
->alignment_power
= alignment_power
;
5245 h
->root
.non_ir_ref_dynamic
= non_ir_ref_dynamic
;
5249 /* Make a special call to the linker "notice" function to
5250 tell it that symbols added for crefs may need to be removed. */
5251 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_not_needed
))
5252 goto error_free_vers
;
5255 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
5257 if (nondeflt_vers
!= NULL
)
5258 free (nondeflt_vers
);
5262 if (old_tab
!= NULL
)
5264 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_needed
))
5265 goto error_free_vers
;
5270 /* Now that all the symbols from this input file are created, if
5271 not performing a relocatable link, handle .symver foo, foo@BAR
5272 such that any relocs against foo become foo@BAR. */
5273 if (!bfd_link_relocatable (info
) && nondeflt_vers
!= NULL
)
5277 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
5279 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
5280 char *shortname
, *p
;
5282 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
5284 || (h
->root
.type
!= bfd_link_hash_defined
5285 && h
->root
.type
!= bfd_link_hash_defweak
))
5288 amt
= p
- h
->root
.root
.string
;
5289 shortname
= (char *) bfd_malloc (amt
+ 1);
5291 goto error_free_vers
;
5292 memcpy (shortname
, h
->root
.root
.string
, amt
);
5293 shortname
[amt
] = '\0';
5295 hi
= (struct elf_link_hash_entry
*)
5296 bfd_link_hash_lookup (&htab
->root
, shortname
,
5297 FALSE
, FALSE
, FALSE
);
5299 && hi
->root
.type
== h
->root
.type
5300 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
5301 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
5303 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
5304 hi
->root
.type
= bfd_link_hash_indirect
;
5305 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
5306 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
5307 sym_hash
= elf_sym_hashes (abfd
);
5309 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
5310 if (sym_hash
[symidx
] == hi
)
5312 sym_hash
[symidx
] = h
;
5318 free (nondeflt_vers
);
5319 nondeflt_vers
= NULL
;
5322 /* Now set the alias field correctly for all the weak defined
5323 symbols we found. The only way to do this is to search all the
5324 symbols. Since we only need the information for non functions in
5325 dynamic objects, that's the only time we actually put anything on
5326 the list WEAKS. We need this information so that if a regular
5327 object refers to a symbol defined weakly in a dynamic object, the
5328 real symbol in the dynamic object is also put in the dynamic
5329 symbols; we also must arrange for both symbols to point to the
5330 same memory location. We could handle the general case of symbol
5331 aliasing, but a general symbol alias can only be generated in
5332 assembler code, handling it correctly would be very time
5333 consuming, and other ELF linkers don't handle general aliasing
5337 struct elf_link_hash_entry
**hpp
;
5338 struct elf_link_hash_entry
**hppend
;
5339 struct elf_link_hash_entry
**sorted_sym_hash
;
5340 struct elf_link_hash_entry
*h
;
5343 /* Since we have to search the whole symbol list for each weak
5344 defined symbol, search time for N weak defined symbols will be
5345 O(N^2). Binary search will cut it down to O(NlogN). */
5347 amt
*= sizeof (struct elf_link_hash_entry
*);
5348 sorted_sym_hash
= (struct elf_link_hash_entry
**) bfd_malloc (amt
);
5349 if (sorted_sym_hash
== NULL
)
5351 sym_hash
= sorted_sym_hash
;
5352 hpp
= elf_sym_hashes (abfd
);
5353 hppend
= hpp
+ extsymcount
;
5355 for (; hpp
< hppend
; hpp
++)
5359 && h
->root
.type
== bfd_link_hash_defined
5360 && !bed
->is_function_type (h
->type
))
5368 qsort (sorted_sym_hash
, sym_count
,
5369 sizeof (struct elf_link_hash_entry
*),
5372 while (weaks
!= NULL
)
5374 struct elf_link_hash_entry
*hlook
;
5377 size_t i
, j
, idx
= 0;
5380 weaks
= hlook
->u
.alias
;
5381 hlook
->u
.alias
= NULL
;
5383 if (hlook
->root
.type
!= bfd_link_hash_defined
5384 && hlook
->root
.type
!= bfd_link_hash_defweak
)
5387 slook
= hlook
->root
.u
.def
.section
;
5388 vlook
= hlook
->root
.u
.def
.value
;
5394 bfd_signed_vma vdiff
;
5396 h
= sorted_sym_hash
[idx
];
5397 vdiff
= vlook
- h
->root
.u
.def
.value
;
5404 int sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
5414 /* We didn't find a value/section match. */
5418 /* With multiple aliases, or when the weak symbol is already
5419 strongly defined, we have multiple matching symbols and
5420 the binary search above may land on any of them. Step
5421 one past the matching symbol(s). */
5424 h
= sorted_sym_hash
[idx
];
5425 if (h
->root
.u
.def
.section
!= slook
5426 || h
->root
.u
.def
.value
!= vlook
)
5430 /* Now look back over the aliases. Since we sorted by size
5431 as well as value and section, we'll choose the one with
5432 the largest size. */
5435 h
= sorted_sym_hash
[idx
];
5437 /* Stop if value or section doesn't match. */
5438 if (h
->root
.u
.def
.section
!= slook
5439 || h
->root
.u
.def
.value
!= vlook
)
5441 else if (h
!= hlook
)
5443 struct elf_link_hash_entry
*t
;
5446 hlook
->is_weakalias
= 1;
5448 if (t
->u
.alias
!= NULL
)
5449 while (t
->u
.alias
!= h
)
5453 /* If the weak definition is in the list of dynamic
5454 symbols, make sure the real definition is put
5456 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
5458 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
5461 free (sorted_sym_hash
);
5466 /* If the real definition is in the list of dynamic
5467 symbols, make sure the weak definition is put
5468 there as well. If we don't do this, then the
5469 dynamic loader might not merge the entries for the
5470 real definition and the weak definition. */
5471 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
5473 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
5474 goto err_free_sym_hash
;
5481 free (sorted_sym_hash
);
5484 if (bed
->check_directives
5485 && !(*bed
->check_directives
) (abfd
, info
))
5488 /* If this is a non-traditional link, try to optimize the handling
5489 of the .stab/.stabstr sections. */
5491 && ! info
->traditional_format
5492 && is_elf_hash_table (htab
)
5493 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
5497 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
5498 if (stabstr
!= NULL
)
5500 bfd_size_type string_offset
= 0;
5503 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
5504 if (CONST_STRNEQ (stab
->name
, ".stab")
5505 && (!stab
->name
[5] ||
5506 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
5507 && (stab
->flags
& SEC_MERGE
) == 0
5508 && !bfd_is_abs_section (stab
->output_section
))
5510 struct bfd_elf_section_data
*secdata
;
5512 secdata
= elf_section_data (stab
);
5513 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
5514 stabstr
, &secdata
->sec_info
,
5517 if (secdata
->sec_info
)
5518 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
5523 if (is_elf_hash_table (htab
) && add_needed
)
5525 /* Add this bfd to the loaded list. */
5526 struct elf_link_loaded_list
*n
;
5528 n
= (struct elf_link_loaded_list
*) bfd_alloc (abfd
, sizeof (*n
));
5532 n
->next
= htab
->loaded
;
5539 if (old_tab
!= NULL
)
5541 if (old_strtab
!= NULL
)
5543 if (nondeflt_vers
!= NULL
)
5544 free (nondeflt_vers
);
5545 if (extversym
!= NULL
)
5548 if (isymbuf
!= NULL
)
5554 /* Return the linker hash table entry of a symbol that might be
5555 satisfied by an archive symbol. Return -1 on error. */
5557 struct elf_link_hash_entry
*
5558 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
5559 struct bfd_link_info
*info
,
5562 struct elf_link_hash_entry
*h
;
5566 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
5570 /* If this is a default version (the name contains @@), look up the
5571 symbol again with only one `@' as well as without the version.
5572 The effect is that references to the symbol with and without the
5573 version will be matched by the default symbol in the archive. */
5575 p
= strchr (name
, ELF_VER_CHR
);
5576 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
5579 /* First check with only one `@'. */
5580 len
= strlen (name
);
5581 copy
= (char *) bfd_alloc (abfd
, len
);
5583 return (struct elf_link_hash_entry
*) -1;
5585 first
= p
- name
+ 1;
5586 memcpy (copy
, name
, first
);
5587 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
5589 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
5592 /* We also need to check references to the symbol without the
5594 copy
[first
- 1] = '\0';
5595 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
5596 FALSE
, FALSE
, TRUE
);
5599 bfd_release (abfd
, copy
);
5603 /* Add symbols from an ELF archive file to the linker hash table. We
5604 don't use _bfd_generic_link_add_archive_symbols because we need to
5605 handle versioned symbols.
5607 Fortunately, ELF archive handling is simpler than that done by
5608 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
5609 oddities. In ELF, if we find a symbol in the archive map, and the
5610 symbol is currently undefined, we know that we must pull in that
5613 Unfortunately, we do have to make multiple passes over the symbol
5614 table until nothing further is resolved. */
5617 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5620 unsigned char *included
= NULL
;
5624 const struct elf_backend_data
*bed
;
5625 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
5626 (bfd
*, struct bfd_link_info
*, const char *);
5628 if (! bfd_has_map (abfd
))
5630 /* An empty archive is a special case. */
5631 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
5633 bfd_set_error (bfd_error_no_armap
);
5637 /* Keep track of all symbols we know to be already defined, and all
5638 files we know to be already included. This is to speed up the
5639 second and subsequent passes. */
5640 c
= bfd_ardata (abfd
)->symdef_count
;
5644 amt
*= sizeof (*included
);
5645 included
= (unsigned char *) bfd_zmalloc (amt
);
5646 if (included
== NULL
)
5649 symdefs
= bfd_ardata (abfd
)->symdefs
;
5650 bed
= get_elf_backend_data (abfd
);
5651 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5664 symdefend
= symdef
+ c
;
5665 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5667 struct elf_link_hash_entry
*h
;
5669 struct bfd_link_hash_entry
*undefs_tail
;
5674 if (symdef
->file_offset
== last
)
5680 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5681 if (h
== (struct elf_link_hash_entry
*) -1)
5687 if (h
->root
.type
== bfd_link_hash_common
)
5689 /* We currently have a common symbol. The archive map contains
5690 a reference to this symbol, so we may want to include it. We
5691 only want to include it however, if this archive element
5692 contains a definition of the symbol, not just another common
5695 Unfortunately some archivers (including GNU ar) will put
5696 declarations of common symbols into their archive maps, as
5697 well as real definitions, so we cannot just go by the archive
5698 map alone. Instead we must read in the element's symbol
5699 table and check that to see what kind of symbol definition
5701 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5704 else if (h
->root
.type
!= bfd_link_hash_undefined
)
5706 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5707 /* Symbol must be defined. Don't check it again. */
5712 /* We need to include this archive member. */
5713 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5714 if (element
== NULL
)
5717 if (! bfd_check_format (element
, bfd_object
))
5720 undefs_tail
= info
->hash
->undefs_tail
;
5722 if (!(*info
->callbacks
5723 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5725 if (!bfd_link_add_symbols (element
, info
))
5728 /* If there are any new undefined symbols, we need to make
5729 another pass through the archive in order to see whether
5730 they can be defined. FIXME: This isn't perfect, because
5731 common symbols wind up on undefs_tail and because an
5732 undefined symbol which is defined later on in this pass
5733 does not require another pass. This isn't a bug, but it
5734 does make the code less efficient than it could be. */
5735 if (undefs_tail
!= info
->hash
->undefs_tail
)
5738 /* Look backward to mark all symbols from this object file
5739 which we have already seen in this pass. */
5743 included
[mark
] = TRUE
;
5748 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5750 /* We mark subsequent symbols from this object file as we go
5751 on through the loop. */
5752 last
= symdef
->file_offset
;
5762 if (included
!= NULL
)
5767 /* Given an ELF BFD, add symbols to the global hash table as
5771 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5773 switch (bfd_get_format (abfd
))
5776 return elf_link_add_object_symbols (abfd
, info
);
5778 return elf_link_add_archive_symbols (abfd
, info
);
5780 bfd_set_error (bfd_error_wrong_format
);
5785 struct hash_codes_info
5787 unsigned long *hashcodes
;
5791 /* This function will be called though elf_link_hash_traverse to store
5792 all hash value of the exported symbols in an array. */
5795 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5797 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5802 /* Ignore indirect symbols. These are added by the versioning code. */
5803 if (h
->dynindx
== -1)
5806 name
= h
->root
.root
.string
;
5807 if (h
->versioned
>= versioned
)
5809 char *p
= strchr (name
, ELF_VER_CHR
);
5812 alc
= (char *) bfd_malloc (p
- name
+ 1);
5818 memcpy (alc
, name
, p
- name
);
5819 alc
[p
- name
] = '\0';
5824 /* Compute the hash value. */
5825 ha
= bfd_elf_hash (name
);
5827 /* Store the found hash value in the array given as the argument. */
5828 *(inf
->hashcodes
)++ = ha
;
5830 /* And store it in the struct so that we can put it in the hash table
5832 h
->u
.elf_hash_value
= ha
;
5840 struct collect_gnu_hash_codes
5843 const struct elf_backend_data
*bed
;
5844 unsigned long int nsyms
;
5845 unsigned long int maskbits
;
5846 unsigned long int *hashcodes
;
5847 unsigned long int *hashval
;
5848 unsigned long int *indx
;
5849 unsigned long int *counts
;
5852 long int min_dynindx
;
5853 unsigned long int bucketcount
;
5854 unsigned long int symindx
;
5855 long int local_indx
;
5856 long int shift1
, shift2
;
5857 unsigned long int mask
;
5861 /* This function will be called though elf_link_hash_traverse to store
5862 all hash value of the exported symbols in an array. */
5865 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5867 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5872 /* Ignore indirect symbols. These are added by the versioning code. */
5873 if (h
->dynindx
== -1)
5876 /* Ignore also local symbols and undefined symbols. */
5877 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5880 name
= h
->root
.root
.string
;
5881 if (h
->versioned
>= versioned
)
5883 char *p
= strchr (name
, ELF_VER_CHR
);
5886 alc
= (char *) bfd_malloc (p
- name
+ 1);
5892 memcpy (alc
, name
, p
- name
);
5893 alc
[p
- name
] = '\0';
5898 /* Compute the hash value. */
5899 ha
= bfd_elf_gnu_hash (name
);
5901 /* Store the found hash value in the array for compute_bucket_count,
5902 and also for .dynsym reordering purposes. */
5903 s
->hashcodes
[s
->nsyms
] = ha
;
5904 s
->hashval
[h
->dynindx
] = ha
;
5906 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
5907 s
->min_dynindx
= h
->dynindx
;
5915 /* This function will be called though elf_link_hash_traverse to do
5916 final dynaminc symbol renumbering. */
5919 elf_renumber_gnu_hash_syms (struct elf_link_hash_entry
*h
, void *data
)
5921 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5922 unsigned long int bucket
;
5923 unsigned long int val
;
5925 /* Ignore indirect symbols. */
5926 if (h
->dynindx
== -1)
5929 /* Ignore also local symbols and undefined symbols. */
5930 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5932 if (h
->dynindx
>= s
->min_dynindx
)
5933 h
->dynindx
= s
->local_indx
++;
5937 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
5938 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
5939 & ((s
->maskbits
>> s
->shift1
) - 1);
5940 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
5942 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
5943 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
5944 if (s
->counts
[bucket
] == 1)
5945 /* Last element terminates the chain. */
5947 bfd_put_32 (s
->output_bfd
, val
,
5948 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
5949 --s
->counts
[bucket
];
5950 h
->dynindx
= s
->indx
[bucket
]++;
5954 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5957 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
5959 return !(h
->forced_local
5960 || h
->root
.type
== bfd_link_hash_undefined
5961 || h
->root
.type
== bfd_link_hash_undefweak
5962 || ((h
->root
.type
== bfd_link_hash_defined
5963 || h
->root
.type
== bfd_link_hash_defweak
)
5964 && h
->root
.u
.def
.section
->output_section
== NULL
));
5967 /* Array used to determine the number of hash table buckets to use
5968 based on the number of symbols there are. If there are fewer than
5969 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
5970 fewer than 37 we use 17 buckets, and so forth. We never use more
5971 than 32771 buckets. */
5973 static const size_t elf_buckets
[] =
5975 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
5979 /* Compute bucket count for hashing table. We do not use a static set
5980 of possible tables sizes anymore. Instead we determine for all
5981 possible reasonable sizes of the table the outcome (i.e., the
5982 number of collisions etc) and choose the best solution. The
5983 weighting functions are not too simple to allow the table to grow
5984 without bounds. Instead one of the weighting factors is the size.
5985 Therefore the result is always a good payoff between few collisions
5986 (= short chain lengths) and table size. */
5988 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5989 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
5990 unsigned long int nsyms
,
5993 size_t best_size
= 0;
5994 unsigned long int i
;
5996 /* We have a problem here. The following code to optimize the table
5997 size requires an integer type with more the 32 bits. If
5998 BFD_HOST_U_64_BIT is set we know about such a type. */
5999 #ifdef BFD_HOST_U_64_BIT
6004 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
6005 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
6006 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
6007 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
6008 unsigned long int *counts
;
6010 unsigned int no_improvement_count
= 0;
6012 /* Possible optimization parameters: if we have NSYMS symbols we say
6013 that the hashing table must at least have NSYMS/4 and at most
6015 minsize
= nsyms
/ 4;
6018 best_size
= maxsize
= nsyms
* 2;
6023 if ((best_size
& 31) == 0)
6027 /* Create array where we count the collisions in. We must use bfd_malloc
6028 since the size could be large. */
6030 amt
*= sizeof (unsigned long int);
6031 counts
= (unsigned long int *) bfd_malloc (amt
);
6035 /* Compute the "optimal" size for the hash table. The criteria is a
6036 minimal chain length. The minor criteria is (of course) the size
6038 for (i
= minsize
; i
< maxsize
; ++i
)
6040 /* Walk through the array of hashcodes and count the collisions. */
6041 BFD_HOST_U_64_BIT max
;
6042 unsigned long int j
;
6043 unsigned long int fact
;
6045 if (gnu_hash
&& (i
& 31) == 0)
6048 memset (counts
, '\0', i
* sizeof (unsigned long int));
6050 /* Determine how often each hash bucket is used. */
6051 for (j
= 0; j
< nsyms
; ++j
)
6052 ++counts
[hashcodes
[j
] % i
];
6054 /* For the weight function we need some information about the
6055 pagesize on the target. This is information need not be 100%
6056 accurate. Since this information is not available (so far) we
6057 define it here to a reasonable default value. If it is crucial
6058 to have a better value some day simply define this value. */
6059 # ifndef BFD_TARGET_PAGESIZE
6060 # define BFD_TARGET_PAGESIZE (4096)
6063 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
6065 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
6068 /* Variant 1: optimize for short chains. We add the squares
6069 of all the chain lengths (which favors many small chain
6070 over a few long chains). */
6071 for (j
= 0; j
< i
; ++j
)
6072 max
+= counts
[j
] * counts
[j
];
6074 /* This adds penalties for the overall size of the table. */
6075 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
6078 /* Variant 2: Optimize a lot more for small table. Here we
6079 also add squares of the size but we also add penalties for
6080 empty slots (the +1 term). */
6081 for (j
= 0; j
< i
; ++j
)
6082 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
6084 /* The overall size of the table is considered, but not as
6085 strong as in variant 1, where it is squared. */
6086 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
6090 /* Compare with current best results. */
6091 if (max
< best_chlen
)
6095 no_improvement_count
= 0;
6097 /* PR 11843: Avoid futile long searches for the best bucket size
6098 when there are a large number of symbols. */
6099 else if (++no_improvement_count
== 100)
6106 #endif /* defined (BFD_HOST_U_64_BIT) */
6108 /* This is the fallback solution if no 64bit type is available or if we
6109 are not supposed to spend much time on optimizations. We select the
6110 bucket count using a fixed set of numbers. */
6111 for (i
= 0; elf_buckets
[i
] != 0; i
++)
6113 best_size
= elf_buckets
[i
];
6114 if (nsyms
< elf_buckets
[i
+ 1])
6117 if (gnu_hash
&& best_size
< 2)
6124 /* Size any SHT_GROUP section for ld -r. */
6127 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
6132 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
6133 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
6134 && (s
= ibfd
->sections
) != NULL
6135 && s
->sec_info_type
!= SEC_INFO_TYPE_JUST_SYMS
6136 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
6141 /* Set a default stack segment size. The value in INFO wins. If it
6142 is unset, LEGACY_SYMBOL's value is used, and if that symbol is
6143 undefined it is initialized. */
6146 bfd_elf_stack_segment_size (bfd
*output_bfd
,
6147 struct bfd_link_info
*info
,
6148 const char *legacy_symbol
,
6149 bfd_vma default_size
)
6151 struct elf_link_hash_entry
*h
= NULL
;
6153 /* Look for legacy symbol. */
6155 h
= elf_link_hash_lookup (elf_hash_table (info
), legacy_symbol
,
6156 FALSE
, FALSE
, FALSE
);
6157 if (h
&& (h
->root
.type
== bfd_link_hash_defined
6158 || h
->root
.type
== bfd_link_hash_defweak
)
6160 && (h
->type
== STT_NOTYPE
|| h
->type
== STT_OBJECT
))
6162 /* The symbol has no type if specified on the command line. */
6163 h
->type
= STT_OBJECT
;
6164 if (info
->stacksize
)
6165 /* xgettext:c-format */
6166 _bfd_error_handler (_("%pB: stack size specified and %s set"),
6167 output_bfd
, legacy_symbol
);
6168 else if (h
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
6169 /* xgettext:c-format */
6170 _bfd_error_handler (_("%pB: %s not absolute"),
6171 output_bfd
, legacy_symbol
);
6173 info
->stacksize
= h
->root
.u
.def
.value
;
6176 if (!info
->stacksize
)
6177 /* If the user didn't set a size, or explicitly inhibit the
6178 size, set it now. */
6179 info
->stacksize
= default_size
;
6181 /* Provide the legacy symbol, if it is referenced. */
6182 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
6183 || h
->root
.type
== bfd_link_hash_undefweak
))
6185 struct bfd_link_hash_entry
*bh
= NULL
;
6187 if (!(_bfd_generic_link_add_one_symbol
6188 (info
, output_bfd
, legacy_symbol
,
6189 BSF_GLOBAL
, bfd_abs_section_ptr
,
6190 info
->stacksize
>= 0 ? info
->stacksize
: 0,
6191 NULL
, FALSE
, get_elf_backend_data (output_bfd
)->collect
, &bh
)))
6194 h
= (struct elf_link_hash_entry
*) bh
;
6196 h
->type
= STT_OBJECT
;
6202 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
6204 struct elf_gc_sweep_symbol_info
6206 struct bfd_link_info
*info
;
6207 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
6212 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
6215 && (((h
->root
.type
== bfd_link_hash_defined
6216 || h
->root
.type
== bfd_link_hash_defweak
)
6217 && !((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
6218 && h
->root
.u
.def
.section
->gc_mark
))
6219 || h
->root
.type
== bfd_link_hash_undefined
6220 || h
->root
.type
== bfd_link_hash_undefweak
))
6222 struct elf_gc_sweep_symbol_info
*inf
;
6224 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
6225 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
6228 h
->ref_regular_nonweak
= 0;
6234 /* Set up the sizes and contents of the ELF dynamic sections. This is
6235 called by the ELF linker emulation before_allocation routine. We
6236 must set the sizes of the sections before the linker sets the
6237 addresses of the various sections. */
6240 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
6243 const char *filter_shlib
,
6245 const char *depaudit
,
6246 const char * const *auxiliary_filters
,
6247 struct bfd_link_info
*info
,
6248 asection
**sinterpptr
)
6251 const struct elf_backend_data
*bed
;
6255 if (!is_elf_hash_table (info
->hash
))
6258 dynobj
= elf_hash_table (info
)->dynobj
;
6260 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6262 struct bfd_elf_version_tree
*verdefs
;
6263 struct elf_info_failed asvinfo
;
6264 struct bfd_elf_version_tree
*t
;
6265 struct bfd_elf_version_expr
*d
;
6269 /* If we are supposed to export all symbols into the dynamic symbol
6270 table (this is not the normal case), then do so. */
6271 if (info
->export_dynamic
6272 || (bfd_link_executable (info
) && info
->dynamic
))
6274 struct elf_info_failed eif
;
6278 elf_link_hash_traverse (elf_hash_table (info
),
6279 _bfd_elf_export_symbol
,
6287 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6289 if (soname_indx
== (size_t) -1
6290 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
6294 soname_indx
= (size_t) -1;
6296 /* Make all global versions with definition. */
6297 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
6298 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
6299 if (!d
->symver
&& d
->literal
)
6301 const char *verstr
, *name
;
6302 size_t namelen
, verlen
, newlen
;
6303 char *newname
, *p
, leading_char
;
6304 struct elf_link_hash_entry
*newh
;
6306 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
6308 namelen
= strlen (name
) + (leading_char
!= '\0');
6310 verlen
= strlen (verstr
);
6311 newlen
= namelen
+ verlen
+ 3;
6313 newname
= (char *) bfd_malloc (newlen
);
6314 if (newname
== NULL
)
6316 newname
[0] = leading_char
;
6317 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
6319 /* Check the hidden versioned definition. */
6320 p
= newname
+ namelen
;
6322 memcpy (p
, verstr
, verlen
+ 1);
6323 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6324 newname
, FALSE
, FALSE
,
6327 || (newh
->root
.type
!= bfd_link_hash_defined
6328 && newh
->root
.type
!= bfd_link_hash_defweak
))
6330 /* Check the default versioned definition. */
6332 memcpy (p
, verstr
, verlen
+ 1);
6333 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6334 newname
, FALSE
, FALSE
,
6339 /* Mark this version if there is a definition and it is
6340 not defined in a shared object. */
6342 && !newh
->def_dynamic
6343 && (newh
->root
.type
== bfd_link_hash_defined
6344 || newh
->root
.type
== bfd_link_hash_defweak
))
6348 /* Attach all the symbols to their version information. */
6349 asvinfo
.info
= info
;
6350 asvinfo
.failed
= FALSE
;
6352 elf_link_hash_traverse (elf_hash_table (info
),
6353 _bfd_elf_link_assign_sym_version
,
6358 if (!info
->allow_undefined_version
)
6360 /* Check if all global versions have a definition. */
6361 bfd_boolean all_defined
= TRUE
;
6362 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
6363 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
6364 if (d
->literal
&& !d
->symver
&& !d
->script
)
6367 (_("%s: undefined version: %s"),
6368 d
->pattern
, t
->name
);
6369 all_defined
= FALSE
;
6374 bfd_set_error (bfd_error_bad_value
);
6379 /* Set up the version definition section. */
6380 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
6381 BFD_ASSERT (s
!= NULL
);
6383 /* We may have created additional version definitions if we are
6384 just linking a regular application. */
6385 verdefs
= info
->version_info
;
6387 /* Skip anonymous version tag. */
6388 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
6389 verdefs
= verdefs
->next
;
6391 if (verdefs
== NULL
&& !info
->create_default_symver
)
6392 s
->flags
|= SEC_EXCLUDE
;
6398 Elf_Internal_Verdef def
;
6399 Elf_Internal_Verdaux defaux
;
6400 struct bfd_link_hash_entry
*bh
;
6401 struct elf_link_hash_entry
*h
;
6407 /* Make space for the base version. */
6408 size
+= sizeof (Elf_External_Verdef
);
6409 size
+= sizeof (Elf_External_Verdaux
);
6412 /* Make space for the default version. */
6413 if (info
->create_default_symver
)
6415 size
+= sizeof (Elf_External_Verdef
);
6419 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6421 struct bfd_elf_version_deps
*n
;
6423 /* Don't emit base version twice. */
6427 size
+= sizeof (Elf_External_Verdef
);
6428 size
+= sizeof (Elf_External_Verdaux
);
6431 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6432 size
+= sizeof (Elf_External_Verdaux
);
6436 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6437 if (s
->contents
== NULL
&& s
->size
!= 0)
6440 /* Fill in the version definition section. */
6444 def
.vd_version
= VER_DEF_CURRENT
;
6445 def
.vd_flags
= VER_FLG_BASE
;
6448 if (info
->create_default_symver
)
6450 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6451 def
.vd_next
= sizeof (Elf_External_Verdef
);
6455 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6456 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6457 + sizeof (Elf_External_Verdaux
));
6460 if (soname_indx
!= (size_t) -1)
6462 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6464 def
.vd_hash
= bfd_elf_hash (soname
);
6465 defaux
.vda_name
= soname_indx
;
6472 name
= lbasename (output_bfd
->filename
);
6473 def
.vd_hash
= bfd_elf_hash (name
);
6474 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6476 if (indx
== (size_t) -1)
6478 defaux
.vda_name
= indx
;
6480 defaux
.vda_next
= 0;
6482 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6483 (Elf_External_Verdef
*) p
);
6484 p
+= sizeof (Elf_External_Verdef
);
6485 if (info
->create_default_symver
)
6487 /* Add a symbol representing this version. */
6489 if (! (_bfd_generic_link_add_one_symbol
6490 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6492 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6494 h
= (struct elf_link_hash_entry
*) bh
;
6497 h
->type
= STT_OBJECT
;
6498 h
->verinfo
.vertree
= NULL
;
6500 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6503 /* Create a duplicate of the base version with the same
6504 aux block, but different flags. */
6507 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6509 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6510 + sizeof (Elf_External_Verdaux
));
6513 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6514 (Elf_External_Verdef
*) p
);
6515 p
+= sizeof (Elf_External_Verdef
);
6517 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6518 (Elf_External_Verdaux
*) p
);
6519 p
+= sizeof (Elf_External_Verdaux
);
6521 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6524 struct bfd_elf_version_deps
*n
;
6526 /* Don't emit the base version twice. */
6531 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6534 /* Add a symbol representing this version. */
6536 if (! (_bfd_generic_link_add_one_symbol
6537 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6539 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6541 h
= (struct elf_link_hash_entry
*) bh
;
6544 h
->type
= STT_OBJECT
;
6545 h
->verinfo
.vertree
= t
;
6547 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6550 def
.vd_version
= VER_DEF_CURRENT
;
6552 if (t
->globals
.list
== NULL
6553 && t
->locals
.list
== NULL
6555 def
.vd_flags
|= VER_FLG_WEAK
;
6556 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6557 def
.vd_cnt
= cdeps
+ 1;
6558 def
.vd_hash
= bfd_elf_hash (t
->name
);
6559 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6562 /* If a basever node is next, it *must* be the last node in
6563 the chain, otherwise Verdef construction breaks. */
6564 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6565 BFD_ASSERT (t
->next
->next
== NULL
);
6567 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6568 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6569 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6571 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6572 (Elf_External_Verdef
*) p
);
6573 p
+= sizeof (Elf_External_Verdef
);
6575 defaux
.vda_name
= h
->dynstr_index
;
6576 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6578 defaux
.vda_next
= 0;
6579 if (t
->deps
!= NULL
)
6580 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6581 t
->name_indx
= defaux
.vda_name
;
6583 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6584 (Elf_External_Verdaux
*) p
);
6585 p
+= sizeof (Elf_External_Verdaux
);
6587 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6589 if (n
->version_needed
== NULL
)
6591 /* This can happen if there was an error in the
6593 defaux
.vda_name
= 0;
6597 defaux
.vda_name
= n
->version_needed
->name_indx
;
6598 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6601 if (n
->next
== NULL
)
6602 defaux
.vda_next
= 0;
6604 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6606 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6607 (Elf_External_Verdaux
*) p
);
6608 p
+= sizeof (Elf_External_Verdaux
);
6612 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6616 bed
= get_elf_backend_data (output_bfd
);
6618 if (info
->gc_sections
&& bed
->can_gc_sections
)
6620 struct elf_gc_sweep_symbol_info sweep_info
;
6622 /* Remove the symbols that were in the swept sections from the
6623 dynamic symbol table. */
6624 sweep_info
.info
= info
;
6625 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
6626 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
6630 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6633 struct elf_find_verdep_info sinfo
;
6635 /* Work out the size of the version reference section. */
6637 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6638 BFD_ASSERT (s
!= NULL
);
6641 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6642 if (sinfo
.vers
== 0)
6644 sinfo
.failed
= FALSE
;
6646 elf_link_hash_traverse (elf_hash_table (info
),
6647 _bfd_elf_link_find_version_dependencies
,
6652 if (elf_tdata (output_bfd
)->verref
== NULL
)
6653 s
->flags
|= SEC_EXCLUDE
;
6656 Elf_Internal_Verneed
*vn
;
6661 /* Build the version dependency section. */
6664 for (vn
= elf_tdata (output_bfd
)->verref
;
6666 vn
= vn
->vn_nextref
)
6668 Elf_Internal_Vernaux
*a
;
6670 size
+= sizeof (Elf_External_Verneed
);
6672 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6673 size
+= sizeof (Elf_External_Vernaux
);
6677 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6678 if (s
->contents
== NULL
)
6682 for (vn
= elf_tdata (output_bfd
)->verref
;
6684 vn
= vn
->vn_nextref
)
6687 Elf_Internal_Vernaux
*a
;
6691 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6694 vn
->vn_version
= VER_NEED_CURRENT
;
6696 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6697 elf_dt_name (vn
->vn_bfd
) != NULL
6698 ? elf_dt_name (vn
->vn_bfd
)
6699 : lbasename (vn
->vn_bfd
->filename
),
6701 if (indx
== (size_t) -1)
6704 vn
->vn_aux
= sizeof (Elf_External_Verneed
);
6705 if (vn
->vn_nextref
== NULL
)
6708 vn
->vn_next
= (sizeof (Elf_External_Verneed
)
6709 + caux
* sizeof (Elf_External_Vernaux
));
6711 _bfd_elf_swap_verneed_out (output_bfd
, vn
,
6712 (Elf_External_Verneed
*) p
);
6713 p
+= sizeof (Elf_External_Verneed
);
6715 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6717 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6718 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6719 a
->vna_nodename
, FALSE
);
6720 if (indx
== (size_t) -1)
6723 if (a
->vna_nextptr
== NULL
)
6726 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6728 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6729 (Elf_External_Vernaux
*) p
);
6730 p
+= sizeof (Elf_External_Vernaux
);
6734 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6738 /* Any syms created from now on start with -1 in
6739 got.refcount/offset and plt.refcount/offset. */
6740 elf_hash_table (info
)->init_got_refcount
6741 = elf_hash_table (info
)->init_got_offset
;
6742 elf_hash_table (info
)->init_plt_refcount
6743 = elf_hash_table (info
)->init_plt_offset
;
6745 if (bfd_link_relocatable (info
)
6746 && !_bfd_elf_size_group_sections (info
))
6749 /* The backend may have to create some sections regardless of whether
6750 we're dynamic or not. */
6751 if (bed
->elf_backend_always_size_sections
6752 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
6755 /* Determine any GNU_STACK segment requirements, after the backend
6756 has had a chance to set a default segment size. */
6757 if (info
->execstack
)
6758 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| PF_X
;
6759 else if (info
->noexecstack
)
6760 elf_stack_flags (output_bfd
) = PF_R
| PF_W
;
6764 asection
*notesec
= NULL
;
6767 for (inputobj
= info
->input_bfds
;
6769 inputobj
= inputobj
->link
.next
)
6774 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
6776 s
= inputobj
->sections
;
6777 if (s
== NULL
|| s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
6780 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
6783 if (s
->flags
& SEC_CODE
)
6787 else if (bed
->default_execstack
)
6790 if (notesec
|| info
->stacksize
> 0)
6791 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| exec
;
6792 if (notesec
&& exec
&& bfd_link_relocatable (info
)
6793 && notesec
->output_section
!= bfd_abs_section_ptr
)
6794 notesec
->output_section
->flags
|= SEC_CODE
;
6797 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6799 struct elf_info_failed eif
;
6800 struct elf_link_hash_entry
*h
;
6804 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
6805 BFD_ASSERT (*sinterpptr
!= NULL
|| !bfd_link_executable (info
) || info
->nointerp
);
6809 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
6811 info
->flags
|= DF_SYMBOLIC
;
6819 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
6821 if (indx
== (size_t) -1)
6824 tag
= info
->new_dtags
? DT_RUNPATH
: DT_RPATH
;
6825 if (!_bfd_elf_add_dynamic_entry (info
, tag
, indx
))
6829 if (filter_shlib
!= NULL
)
6833 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6834 filter_shlib
, TRUE
);
6835 if (indx
== (size_t) -1
6836 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
6840 if (auxiliary_filters
!= NULL
)
6842 const char * const *p
;
6844 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
6848 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6850 if (indx
== (size_t) -1
6851 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
6860 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
6862 if (indx
== (size_t) -1
6863 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
6867 if (depaudit
!= NULL
)
6871 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
6873 if (indx
== (size_t) -1
6874 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
6881 /* Find all symbols which were defined in a dynamic object and make
6882 the backend pick a reasonable value for them. */
6883 elf_link_hash_traverse (elf_hash_table (info
),
6884 _bfd_elf_adjust_dynamic_symbol
,
6889 /* Add some entries to the .dynamic section. We fill in some of the
6890 values later, in bfd_elf_final_link, but we must add the entries
6891 now so that we know the final size of the .dynamic section. */
6893 /* If there are initialization and/or finalization functions to
6894 call then add the corresponding DT_INIT/DT_FINI entries. */
6895 h
= (info
->init_function
6896 ? elf_link_hash_lookup (elf_hash_table (info
),
6897 info
->init_function
, FALSE
,
6904 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
6907 h
= (info
->fini_function
6908 ? elf_link_hash_lookup (elf_hash_table (info
),
6909 info
->fini_function
, FALSE
,
6916 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
6920 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
6921 if (s
!= NULL
&& s
->linker_has_input
)
6923 /* DT_PREINIT_ARRAY is not allowed in shared library. */
6924 if (! bfd_link_executable (info
))
6929 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
6930 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
6931 && (o
= sub
->sections
) != NULL
6932 && o
->sec_info_type
!= SEC_INFO_TYPE_JUST_SYMS
)
6933 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
6934 if (elf_section_data (o
)->this_hdr
.sh_type
6935 == SHT_PREINIT_ARRAY
)
6938 (_("%pB: .preinit_array section is not allowed in DSO"),
6943 bfd_set_error (bfd_error_nonrepresentable_section
);
6947 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
6948 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
6951 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
6952 if (s
!= NULL
&& s
->linker_has_input
)
6954 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
6955 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
6958 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
6959 if (s
!= NULL
&& s
->linker_has_input
)
6961 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
6962 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
6966 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
6967 /* If .dynstr is excluded from the link, we don't want any of
6968 these tags. Strictly, we should be checking each section
6969 individually; This quick check covers for the case where
6970 someone does a /DISCARD/ : { *(*) }. */
6971 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
6973 bfd_size_type strsize
;
6975 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6976 if ((info
->emit_hash
6977 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
6978 || (info
->emit_gnu_hash
6979 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0))
6980 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
6981 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
6982 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
6983 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
6984 bed
->s
->sizeof_sym
))
6989 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
6992 /* The backend must work out the sizes of all the other dynamic
6995 && bed
->elf_backend_size_dynamic_sections
!= NULL
6996 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
6999 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
7001 if (elf_tdata (output_bfd
)->cverdefs
)
7003 unsigned int crefs
= elf_tdata (output_bfd
)->cverdefs
;
7005 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
7006 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, crefs
))
7010 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
7012 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
7015 else if (info
->flags
& DF_BIND_NOW
)
7017 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
7023 if (bfd_link_executable (info
))
7024 info
->flags_1
&= ~ (DF_1_INITFIRST
7027 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
7031 if (elf_tdata (output_bfd
)->cverrefs
)
7033 unsigned int crefs
= elf_tdata (output_bfd
)->cverrefs
;
7035 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
7036 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
7040 if ((elf_tdata (output_bfd
)->cverrefs
== 0
7041 && elf_tdata (output_bfd
)->cverdefs
== 0)
7042 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
, NULL
) <= 1)
7046 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
7047 s
->flags
|= SEC_EXCLUDE
;
7053 /* Find the first non-excluded output section. We'll use its
7054 section symbol for some emitted relocs. */
7056 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
7059 asection
*found
= NULL
;
7061 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7062 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7063 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7066 if ((s
->flags
& SEC_THREAD_LOCAL
) == 0)
7069 elf_hash_table (info
)->text_index_section
= found
;
7072 /* Find two non-excluded output sections, one for code, one for data.
7073 We'll use their section symbols for some emitted relocs. */
7075 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
7078 asection
*found
= NULL
;
7080 /* Data first, since setting text_index_section changes
7081 _bfd_elf_omit_section_dynsym_default. */
7082 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7083 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7084 && !(s
->flags
& SEC_READONLY
)
7085 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7088 if ((s
->flags
& SEC_THREAD_LOCAL
) == 0)
7091 elf_hash_table (info
)->data_index_section
= found
;
7093 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7094 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7095 && (s
->flags
& SEC_READONLY
)
7096 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7101 elf_hash_table (info
)->text_index_section
= found
;
7105 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
7107 const struct elf_backend_data
*bed
;
7108 unsigned long section_sym_count
;
7109 bfd_size_type dynsymcount
= 0;
7111 if (!is_elf_hash_table (info
->hash
))
7114 bed
= get_elf_backend_data (output_bfd
);
7115 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
7117 /* Assign dynsym indices. In a shared library we generate a section
7118 symbol for each output section, which come first. Next come all
7119 of the back-end allocated local dynamic syms, followed by the rest
7120 of the global symbols.
7122 This is usually not needed for static binaries, however backends
7123 can request to always do it, e.g. the MIPS backend uses dynamic
7124 symbol counts to lay out GOT, which will be produced in the
7125 presence of GOT relocations even in static binaries (holding fixed
7126 data in that case, to satisfy those relocations). */
7128 if (elf_hash_table (info
)->dynamic_sections_created
7129 || bed
->always_renumber_dynsyms
)
7130 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
7131 §ion_sym_count
);
7133 if (elf_hash_table (info
)->dynamic_sections_created
)
7137 unsigned int dtagcount
;
7139 dynobj
= elf_hash_table (info
)->dynobj
;
7141 /* Work out the size of the symbol version section. */
7142 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
7143 BFD_ASSERT (s
!= NULL
);
7144 if ((s
->flags
& SEC_EXCLUDE
) == 0)
7146 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
7147 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7148 if (s
->contents
== NULL
)
7151 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
7155 /* Set the size of the .dynsym and .hash sections. We counted
7156 the number of dynamic symbols in elf_link_add_object_symbols.
7157 We will build the contents of .dynsym and .hash when we build
7158 the final symbol table, because until then we do not know the
7159 correct value to give the symbols. We built the .dynstr
7160 section as we went along in elf_link_add_object_symbols. */
7161 s
= elf_hash_table (info
)->dynsym
;
7162 BFD_ASSERT (s
!= NULL
);
7163 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
7165 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
7166 if (s
->contents
== NULL
)
7169 /* The first entry in .dynsym is a dummy symbol. Clear all the
7170 section syms, in case we don't output them all. */
7171 ++section_sym_count
;
7172 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
7174 elf_hash_table (info
)->bucketcount
= 0;
7176 /* Compute the size of the hashing table. As a side effect this
7177 computes the hash values for all the names we export. */
7178 if (info
->emit_hash
)
7180 unsigned long int *hashcodes
;
7181 struct hash_codes_info hashinf
;
7183 unsigned long int nsyms
;
7185 size_t hash_entry_size
;
7187 /* Compute the hash values for all exported symbols. At the same
7188 time store the values in an array so that we could use them for
7190 amt
= dynsymcount
* sizeof (unsigned long int);
7191 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
7192 if (hashcodes
== NULL
)
7194 hashinf
.hashcodes
= hashcodes
;
7195 hashinf
.error
= FALSE
;
7197 /* Put all hash values in HASHCODES. */
7198 elf_link_hash_traverse (elf_hash_table (info
),
7199 elf_collect_hash_codes
, &hashinf
);
7206 nsyms
= hashinf
.hashcodes
- hashcodes
;
7208 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
7211 if (bucketcount
== 0 && nsyms
> 0)
7214 elf_hash_table (info
)->bucketcount
= bucketcount
;
7216 s
= bfd_get_linker_section (dynobj
, ".hash");
7217 BFD_ASSERT (s
!= NULL
);
7218 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
7219 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
7220 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7221 if (s
->contents
== NULL
)
7224 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
7225 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
7226 s
->contents
+ hash_entry_size
);
7229 if (info
->emit_gnu_hash
)
7232 unsigned char *contents
;
7233 struct collect_gnu_hash_codes cinfo
;
7237 memset (&cinfo
, 0, sizeof (cinfo
));
7239 /* Compute the hash values for all exported symbols. At the same
7240 time store the values in an array so that we could use them for
7242 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
7243 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
7244 if (cinfo
.hashcodes
== NULL
)
7247 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
7248 cinfo
.min_dynindx
= -1;
7249 cinfo
.output_bfd
= output_bfd
;
7252 /* Put all hash values in HASHCODES. */
7253 elf_link_hash_traverse (elf_hash_table (info
),
7254 elf_collect_gnu_hash_codes
, &cinfo
);
7257 free (cinfo
.hashcodes
);
7262 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
7264 if (bucketcount
== 0)
7266 free (cinfo
.hashcodes
);
7270 s
= bfd_get_linker_section (dynobj
, ".gnu.hash");
7271 BFD_ASSERT (s
!= NULL
);
7273 if (cinfo
.nsyms
== 0)
7275 /* Empty .gnu.hash section is special. */
7276 BFD_ASSERT (cinfo
.min_dynindx
== -1);
7277 free (cinfo
.hashcodes
);
7278 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
7279 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7280 if (contents
== NULL
)
7282 s
->contents
= contents
;
7283 /* 1 empty bucket. */
7284 bfd_put_32 (output_bfd
, 1, contents
);
7285 /* SYMIDX above the special symbol 0. */
7286 bfd_put_32 (output_bfd
, 1, contents
+ 4);
7287 /* Just one word for bitmask. */
7288 bfd_put_32 (output_bfd
, 1, contents
+ 8);
7289 /* Only hash fn bloom filter. */
7290 bfd_put_32 (output_bfd
, 0, contents
+ 12);
7291 /* No hashes are valid - empty bitmask. */
7292 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
7293 /* No hashes in the only bucket. */
7294 bfd_put_32 (output_bfd
, 0,
7295 contents
+ 16 + bed
->s
->arch_size
/ 8);
7299 unsigned long int maskwords
, maskbitslog2
, x
;
7300 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
7304 while ((x
>>= 1) != 0)
7306 if (maskbitslog2
< 3)
7308 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
7309 maskbitslog2
= maskbitslog2
+ 3;
7311 maskbitslog2
= maskbitslog2
+ 2;
7312 if (bed
->s
->arch_size
== 64)
7314 if (maskbitslog2
== 5)
7320 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
7321 cinfo
.shift2
= maskbitslog2
;
7322 cinfo
.maskbits
= 1 << maskbitslog2
;
7323 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
7324 amt
= bucketcount
* sizeof (unsigned long int) * 2;
7325 amt
+= maskwords
* sizeof (bfd_vma
);
7326 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
7327 if (cinfo
.bitmask
== NULL
)
7329 free (cinfo
.hashcodes
);
7333 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
7334 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
7335 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
7336 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
7338 /* Determine how often each hash bucket is used. */
7339 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
7340 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
7341 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
7343 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
7344 if (cinfo
.counts
[i
] != 0)
7346 cinfo
.indx
[i
] = cnt
;
7347 cnt
+= cinfo
.counts
[i
];
7349 BFD_ASSERT (cnt
== dynsymcount
);
7350 cinfo
.bucketcount
= bucketcount
;
7351 cinfo
.local_indx
= cinfo
.min_dynindx
;
7353 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
7354 s
->size
+= cinfo
.maskbits
/ 8;
7355 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7356 if (contents
== NULL
)
7358 free (cinfo
.bitmask
);
7359 free (cinfo
.hashcodes
);
7363 s
->contents
= contents
;
7364 bfd_put_32 (output_bfd
, bucketcount
, contents
);
7365 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
7366 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
7367 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
7368 contents
+= 16 + cinfo
.maskbits
/ 8;
7370 for (i
= 0; i
< bucketcount
; ++i
)
7372 if (cinfo
.counts
[i
] == 0)
7373 bfd_put_32 (output_bfd
, 0, contents
);
7375 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
7379 cinfo
.contents
= contents
;
7381 /* Renumber dynamic symbols, populate .gnu.hash section. */
7382 elf_link_hash_traverse (elf_hash_table (info
),
7383 elf_renumber_gnu_hash_syms
, &cinfo
);
7385 contents
= s
->contents
+ 16;
7386 for (i
= 0; i
< maskwords
; ++i
)
7388 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
7390 contents
+= bed
->s
->arch_size
/ 8;
7393 free (cinfo
.bitmask
);
7394 free (cinfo
.hashcodes
);
7398 s
= bfd_get_linker_section (dynobj
, ".dynstr");
7399 BFD_ASSERT (s
!= NULL
);
7401 elf_finalize_dynstr (output_bfd
, info
);
7403 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
7405 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
7406 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
7413 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
7416 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
7419 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
7420 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
7423 /* Finish SHF_MERGE section merging. */
7426 _bfd_elf_merge_sections (bfd
*obfd
, struct bfd_link_info
*info
)
7431 if (!is_elf_hash_table (info
->hash
))
7434 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
7435 if ((ibfd
->flags
& DYNAMIC
) == 0
7436 && bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
7437 && (elf_elfheader (ibfd
)->e_ident
[EI_CLASS
]
7438 == get_elf_backend_data (obfd
)->s
->elfclass
))
7439 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
7440 if ((sec
->flags
& SEC_MERGE
) != 0
7441 && !bfd_is_abs_section (sec
->output_section
))
7443 struct bfd_elf_section_data
*secdata
;
7445 secdata
= elf_section_data (sec
);
7446 if (! _bfd_add_merge_section (obfd
,
7447 &elf_hash_table (info
)->merge_info
,
7448 sec
, &secdata
->sec_info
))
7450 else if (secdata
->sec_info
)
7451 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
7454 if (elf_hash_table (info
)->merge_info
!= NULL
)
7455 _bfd_merge_sections (obfd
, info
, elf_hash_table (info
)->merge_info
,
7456 merge_sections_remove_hook
);
7460 /* Create an entry in an ELF linker hash table. */
7462 struct bfd_hash_entry
*
7463 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
7464 struct bfd_hash_table
*table
,
7467 /* Allocate the structure if it has not already been allocated by a
7471 entry
= (struct bfd_hash_entry
*)
7472 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
7477 /* Call the allocation method of the superclass. */
7478 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
7481 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
7482 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
7484 /* Set local fields. */
7487 ret
->got
= htab
->init_got_refcount
;
7488 ret
->plt
= htab
->init_plt_refcount
;
7489 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
7490 - offsetof (struct elf_link_hash_entry
, size
)));
7491 /* Assume that we have been called by a non-ELF symbol reader.
7492 This flag is then reset by the code which reads an ELF input
7493 file. This ensures that a symbol created by a non-ELF symbol
7494 reader will have the flag set correctly. */
7501 /* Copy data from an indirect symbol to its direct symbol, hiding the
7502 old indirect symbol. Also used for copying flags to a weakdef. */
7505 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
7506 struct elf_link_hash_entry
*dir
,
7507 struct elf_link_hash_entry
*ind
)
7509 struct elf_link_hash_table
*htab
;
7511 /* Copy down any references that we may have already seen to the
7512 symbol which just became indirect. */
7514 if (dir
->versioned
!= versioned_hidden
)
7515 dir
->ref_dynamic
|= ind
->ref_dynamic
;
7516 dir
->ref_regular
|= ind
->ref_regular
;
7517 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
7518 dir
->non_got_ref
|= ind
->non_got_ref
;
7519 dir
->needs_plt
|= ind
->needs_plt
;
7520 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
7522 if (ind
->root
.type
!= bfd_link_hash_indirect
)
7525 /* Copy over the global and procedure linkage table refcount entries.
7526 These may have been already set up by a check_relocs routine. */
7527 htab
= elf_hash_table (info
);
7528 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
7530 if (dir
->got
.refcount
< 0)
7531 dir
->got
.refcount
= 0;
7532 dir
->got
.refcount
+= ind
->got
.refcount
;
7533 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
7536 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
7538 if (dir
->plt
.refcount
< 0)
7539 dir
->plt
.refcount
= 0;
7540 dir
->plt
.refcount
+= ind
->plt
.refcount
;
7541 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
7544 if (ind
->dynindx
!= -1)
7546 if (dir
->dynindx
!= -1)
7547 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
7548 dir
->dynindx
= ind
->dynindx
;
7549 dir
->dynstr_index
= ind
->dynstr_index
;
7551 ind
->dynstr_index
= 0;
7556 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
7557 struct elf_link_hash_entry
*h
,
7558 bfd_boolean force_local
)
7560 /* STT_GNU_IFUNC symbol must go through PLT. */
7561 if (h
->type
!= STT_GNU_IFUNC
)
7563 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
7568 h
->forced_local
= 1;
7569 if (h
->dynindx
!= -1)
7571 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
7574 h
->dynstr_index
= 0;
7579 /* Hide a symbol. */
7582 _bfd_elf_link_hide_symbol (bfd
*output_bfd
,
7583 struct bfd_link_info
*info
,
7584 struct bfd_link_hash_entry
*h
)
7586 if (is_elf_hash_table (info
->hash
))
7588 const struct elf_backend_data
*bed
7589 = get_elf_backend_data (output_bfd
);
7590 struct elf_link_hash_entry
*eh
7591 = (struct elf_link_hash_entry
*) h
;
7592 bed
->elf_backend_hide_symbol (info
, eh
, TRUE
);
7593 eh
->def_dynamic
= 0;
7594 eh
->ref_dynamic
= 0;
7595 eh
->dynamic_def
= 0;
7599 /* Initialize an ELF linker hash table. *TABLE has been zeroed by our
7603 _bfd_elf_link_hash_table_init
7604 (struct elf_link_hash_table
*table
,
7606 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
7607 struct bfd_hash_table
*,
7609 unsigned int entsize
,
7610 enum elf_target_id target_id
)
7613 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
7615 table
->init_got_refcount
.refcount
= can_refcount
- 1;
7616 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
7617 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
7618 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
7619 /* The first dynamic symbol is a dummy. */
7620 table
->dynsymcount
= 1;
7622 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
7624 table
->root
.type
= bfd_link_elf_hash_table
;
7625 table
->hash_table_id
= target_id
;
7630 /* Create an ELF linker hash table. */
7632 struct bfd_link_hash_table
*
7633 _bfd_elf_link_hash_table_create (bfd
*abfd
)
7635 struct elf_link_hash_table
*ret
;
7636 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
7638 ret
= (struct elf_link_hash_table
*) bfd_zmalloc (amt
);
7642 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
7643 sizeof (struct elf_link_hash_entry
),
7649 ret
->root
.hash_table_free
= _bfd_elf_link_hash_table_free
;
7654 /* Destroy an ELF linker hash table. */
7657 _bfd_elf_link_hash_table_free (bfd
*obfd
)
7659 struct elf_link_hash_table
*htab
;
7661 htab
= (struct elf_link_hash_table
*) obfd
->link
.hash
;
7662 if (htab
->dynstr
!= NULL
)
7663 _bfd_elf_strtab_free (htab
->dynstr
);
7664 _bfd_merge_sections_free (htab
->merge_info
);
7665 _bfd_generic_link_hash_table_free (obfd
);
7668 /* This is a hook for the ELF emulation code in the generic linker to
7669 tell the backend linker what file name to use for the DT_NEEDED
7670 entry for a dynamic object. */
7673 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
7675 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7676 && bfd_get_format (abfd
) == bfd_object
)
7677 elf_dt_name (abfd
) = name
;
7681 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
7684 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7685 && bfd_get_format (abfd
) == bfd_object
)
7686 lib_class
= elf_dyn_lib_class (abfd
);
7693 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
7695 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7696 && bfd_get_format (abfd
) == bfd_object
)
7697 elf_dyn_lib_class (abfd
) = lib_class
;
7700 /* Get the list of DT_NEEDED entries for a link. This is a hook for
7701 the linker ELF emulation code. */
7703 struct bfd_link_needed_list
*
7704 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7705 struct bfd_link_info
*info
)
7707 if (! is_elf_hash_table (info
->hash
))
7709 return elf_hash_table (info
)->needed
;
7712 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
7713 hook for the linker ELF emulation code. */
7715 struct bfd_link_needed_list
*
7716 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7717 struct bfd_link_info
*info
)
7719 if (! is_elf_hash_table (info
->hash
))
7721 return elf_hash_table (info
)->runpath
;
7724 /* Get the name actually used for a dynamic object for a link. This
7725 is the SONAME entry if there is one. Otherwise, it is the string
7726 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
7729 bfd_elf_get_dt_soname (bfd
*abfd
)
7731 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7732 && bfd_get_format (abfd
) == bfd_object
)
7733 return elf_dt_name (abfd
);
7737 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
7738 the ELF linker emulation code. */
7741 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
7742 struct bfd_link_needed_list
**pneeded
)
7745 bfd_byte
*dynbuf
= NULL
;
7746 unsigned int elfsec
;
7747 unsigned long shlink
;
7748 bfd_byte
*extdyn
, *extdynend
;
7750 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
7754 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
7755 || bfd_get_format (abfd
) != bfd_object
)
7758 s
= bfd_get_section_by_name (abfd
, ".dynamic");
7759 if (s
== NULL
|| s
->size
== 0)
7762 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
7765 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
7766 if (elfsec
== SHN_BAD
)
7769 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
7771 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
7772 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
7775 extdynend
= extdyn
+ s
->size
;
7776 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
7778 Elf_Internal_Dyn dyn
;
7780 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
7782 if (dyn
.d_tag
== DT_NULL
)
7785 if (dyn
.d_tag
== DT_NEEDED
)
7788 struct bfd_link_needed_list
*l
;
7789 unsigned int tagv
= dyn
.d_un
.d_val
;
7792 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
7797 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
7818 struct elf_symbuf_symbol
7820 unsigned long st_name
; /* Symbol name, index in string tbl */
7821 unsigned char st_info
; /* Type and binding attributes */
7822 unsigned char st_other
; /* Visibilty, and target specific */
7825 struct elf_symbuf_head
7827 struct elf_symbuf_symbol
*ssym
;
7829 unsigned int st_shndx
;
7836 Elf_Internal_Sym
*isym
;
7837 struct elf_symbuf_symbol
*ssym
;
7842 /* Sort references to symbols by ascending section number. */
7845 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7847 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
7848 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
7850 return s1
->st_shndx
- s2
->st_shndx
;
7854 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7856 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7857 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7858 return strcmp (s1
->name
, s2
->name
);
7861 static struct elf_symbuf_head
*
7862 elf_create_symbuf (size_t symcount
, Elf_Internal_Sym
*isymbuf
)
7864 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
7865 struct elf_symbuf_symbol
*ssym
;
7866 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
7867 size_t i
, shndx_count
, total_size
;
7869 indbuf
= (Elf_Internal_Sym
**) bfd_malloc2 (symcount
, sizeof (*indbuf
));
7873 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
7874 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
)
7875 *ind
++ = &isymbuf
[i
];
7878 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
7879 elf_sort_elf_symbol
);
7882 if (indbufend
> indbuf
)
7883 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
7884 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
7887 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
7888 + (indbufend
- indbuf
) * sizeof (*ssym
));
7889 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
7890 if (ssymbuf
== NULL
)
7896 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
7897 ssymbuf
->ssym
= NULL
;
7898 ssymbuf
->count
= shndx_count
;
7899 ssymbuf
->st_shndx
= 0;
7900 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
7902 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
7905 ssymhead
->ssym
= ssym
;
7906 ssymhead
->count
= 0;
7907 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
7909 ssym
->st_name
= (*ind
)->st_name
;
7910 ssym
->st_info
= (*ind
)->st_info
;
7911 ssym
->st_other
= (*ind
)->st_other
;
7914 BFD_ASSERT ((size_t) (ssymhead
- ssymbuf
) == shndx_count
7915 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
7922 /* Check if 2 sections define the same set of local and global
7926 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
7927 struct bfd_link_info
*info
)
7930 const struct elf_backend_data
*bed1
, *bed2
;
7931 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7932 size_t symcount1
, symcount2
;
7933 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7934 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
7935 Elf_Internal_Sym
*isym
, *isymend
;
7936 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
7937 size_t count1
, count2
, i
;
7938 unsigned int shndx1
, shndx2
;
7944 /* Both sections have to be in ELF. */
7945 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7946 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7949 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7952 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7953 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7954 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
7957 bed1
= get_elf_backend_data (bfd1
);
7958 bed2
= get_elf_backend_data (bfd2
);
7959 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7960 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7961 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7962 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7964 if (symcount1
== 0 || symcount2
== 0)
7970 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
7971 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
7973 if (ssymbuf1
== NULL
)
7975 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7977 if (isymbuf1
== NULL
)
7980 if (!info
->reduce_memory_overheads
)
7981 elf_tdata (bfd1
)->symbuf
= ssymbuf1
7982 = elf_create_symbuf (symcount1
, isymbuf1
);
7985 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
7987 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7989 if (isymbuf2
== NULL
)
7992 if (ssymbuf1
!= NULL
&& !info
->reduce_memory_overheads
)
7993 elf_tdata (bfd2
)->symbuf
= ssymbuf2
7994 = elf_create_symbuf (symcount2
, isymbuf2
);
7997 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
7999 /* Optimized faster version. */
8001 struct elf_symbol
*symp
;
8002 struct elf_symbuf_symbol
*ssym
, *ssymend
;
8005 hi
= ssymbuf1
->count
;
8010 mid
= (lo
+ hi
) / 2;
8011 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
8013 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
8017 count1
= ssymbuf1
[mid
].count
;
8024 hi
= ssymbuf2
->count
;
8029 mid
= (lo
+ hi
) / 2;
8030 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
8032 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
8036 count2
= ssymbuf2
[mid
].count
;
8042 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8046 = (struct elf_symbol
*) bfd_malloc (count1
* sizeof (*symtable1
));
8048 = (struct elf_symbol
*) bfd_malloc (count2
* sizeof (*symtable2
));
8049 if (symtable1
== NULL
|| symtable2
== NULL
)
8053 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
8054 ssym
< ssymend
; ssym
++, symp
++)
8056 symp
->u
.ssym
= ssym
;
8057 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8063 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
8064 ssym
< ssymend
; ssym
++, symp
++)
8066 symp
->u
.ssym
= ssym
;
8067 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8072 /* Sort symbol by name. */
8073 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8074 elf_sym_name_compare
);
8075 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8076 elf_sym_name_compare
);
8078 for (i
= 0; i
< count1
; i
++)
8079 /* Two symbols must have the same binding, type and name. */
8080 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
8081 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
8082 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8089 symtable1
= (struct elf_symbol
*)
8090 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
8091 symtable2
= (struct elf_symbol
*)
8092 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
8093 if (symtable1
== NULL
|| symtable2
== NULL
)
8096 /* Count definitions in the section. */
8098 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
8099 if (isym
->st_shndx
== shndx1
)
8100 symtable1
[count1
++].u
.isym
= isym
;
8103 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
8104 if (isym
->st_shndx
== shndx2
)
8105 symtable2
[count2
++].u
.isym
= isym
;
8107 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8110 for (i
= 0; i
< count1
; i
++)
8112 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
8113 symtable1
[i
].u
.isym
->st_name
);
8115 for (i
= 0; i
< count2
; i
++)
8117 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
8118 symtable2
[i
].u
.isym
->st_name
);
8120 /* Sort symbol by name. */
8121 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8122 elf_sym_name_compare
);
8123 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8124 elf_sym_name_compare
);
8126 for (i
= 0; i
< count1
; i
++)
8127 /* Two symbols must have the same binding, type and name. */
8128 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
8129 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
8130 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8148 /* Return TRUE if 2 section types are compatible. */
8151 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
8152 bfd
*bbfd
, const asection
*bsec
)
8156 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
8157 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8160 return elf_section_type (asec
) == elf_section_type (bsec
);
8163 /* Final phase of ELF linker. */
8165 /* A structure we use to avoid passing large numbers of arguments. */
8167 struct elf_final_link_info
8169 /* General link information. */
8170 struct bfd_link_info
*info
;
8173 /* Symbol string table. */
8174 struct elf_strtab_hash
*symstrtab
;
8175 /* .hash section. */
8177 /* symbol version section (.gnu.version). */
8178 asection
*symver_sec
;
8179 /* Buffer large enough to hold contents of any section. */
8181 /* Buffer large enough to hold external relocs of any section. */
8182 void *external_relocs
;
8183 /* Buffer large enough to hold internal relocs of any section. */
8184 Elf_Internal_Rela
*internal_relocs
;
8185 /* Buffer large enough to hold external local symbols of any input
8187 bfd_byte
*external_syms
;
8188 /* And a buffer for symbol section indices. */
8189 Elf_External_Sym_Shndx
*locsym_shndx
;
8190 /* Buffer large enough to hold internal local symbols of any input
8192 Elf_Internal_Sym
*internal_syms
;
8193 /* Array large enough to hold a symbol index for each local symbol
8194 of any input BFD. */
8196 /* Array large enough to hold a section pointer for each local
8197 symbol of any input BFD. */
8198 asection
**sections
;
8199 /* Buffer for SHT_SYMTAB_SHNDX section. */
8200 Elf_External_Sym_Shndx
*symshndxbuf
;
8201 /* Number of STT_FILE syms seen. */
8202 size_t filesym_count
;
8205 /* This struct is used to pass information to elf_link_output_extsym. */
8207 struct elf_outext_info
8210 bfd_boolean localsyms
;
8211 bfd_boolean file_sym_done
;
8212 struct elf_final_link_info
*flinfo
;
8216 /* Support for evaluating a complex relocation.
8218 Complex relocations are generalized, self-describing relocations. The
8219 implementation of them consists of two parts: complex symbols, and the
8220 relocations themselves.
8222 The relocations are use a reserved elf-wide relocation type code (R_RELC
8223 external / BFD_RELOC_RELC internal) and an encoding of relocation field
8224 information (start bit, end bit, word width, etc) into the addend. This
8225 information is extracted from CGEN-generated operand tables within gas.
8227 Complex symbols are mangled symbols (BSF_RELC external / STT_RELC
8228 internal) representing prefix-notation expressions, including but not
8229 limited to those sorts of expressions normally encoded as addends in the
8230 addend field. The symbol mangling format is:
8233 | <unary-operator> ':' <node>
8234 | <binary-operator> ':' <node> ':' <node>
8237 <literal> := 's' <digits=N> ':' <N character symbol name>
8238 | 'S' <digits=N> ':' <N character section name>
8242 <binary-operator> := as in C
8243 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
8246 set_symbol_value (bfd
*bfd_with_globals
,
8247 Elf_Internal_Sym
*isymbuf
,
8252 struct elf_link_hash_entry
**sym_hashes
;
8253 struct elf_link_hash_entry
*h
;
8254 size_t extsymoff
= locsymcount
;
8256 if (symidx
< locsymcount
)
8258 Elf_Internal_Sym
*sym
;
8260 sym
= isymbuf
+ symidx
;
8261 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
8263 /* It is a local symbol: move it to the
8264 "absolute" section and give it a value. */
8265 sym
->st_shndx
= SHN_ABS
;
8266 sym
->st_value
= val
;
8269 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
8273 /* It is a global symbol: set its link type
8274 to "defined" and give it a value. */
8276 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
8277 h
= sym_hashes
[symidx
- extsymoff
];
8278 while (h
->root
.type
== bfd_link_hash_indirect
8279 || h
->root
.type
== bfd_link_hash_warning
)
8280 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8281 h
->root
.type
= bfd_link_hash_defined
;
8282 h
->root
.u
.def
.value
= val
;
8283 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
8287 resolve_symbol (const char *name
,
8289 struct elf_final_link_info
*flinfo
,
8291 Elf_Internal_Sym
*isymbuf
,
8294 Elf_Internal_Sym
*sym
;
8295 struct bfd_link_hash_entry
*global_entry
;
8296 const char *candidate
= NULL
;
8297 Elf_Internal_Shdr
*symtab_hdr
;
8300 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
8302 for (i
= 0; i
< locsymcount
; ++ i
)
8306 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
8309 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
8310 symtab_hdr
->sh_link
,
8313 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
8314 name
, candidate
, (unsigned long) sym
->st_value
);
8316 if (candidate
&& strcmp (candidate
, name
) == 0)
8318 asection
*sec
= flinfo
->sections
[i
];
8320 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
8321 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
8323 printf ("Found symbol with value %8.8lx\n",
8324 (unsigned long) *result
);
8330 /* Hmm, haven't found it yet. perhaps it is a global. */
8331 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
8332 FALSE
, FALSE
, TRUE
);
8336 if (global_entry
->type
== bfd_link_hash_defined
8337 || global_entry
->type
== bfd_link_hash_defweak
)
8339 *result
= (global_entry
->u
.def
.value
8340 + global_entry
->u
.def
.section
->output_section
->vma
8341 + global_entry
->u
.def
.section
->output_offset
);
8343 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
8344 global_entry
->root
.string
, (unsigned long) *result
);
8352 /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in
8353 bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section
8354 names like "foo.end" which is the end address of section "foo". */
8357 resolve_section (const char *name
,
8365 for (curr
= sections
; curr
; curr
= curr
->next
)
8366 if (strcmp (curr
->name
, name
) == 0)
8368 *result
= curr
->vma
;
8372 /* Hmm. still haven't found it. try pseudo-section names. */
8373 /* FIXME: This could be coded more efficiently... */
8374 for (curr
= sections
; curr
; curr
= curr
->next
)
8376 len
= strlen (curr
->name
);
8377 if (len
> strlen (name
))
8380 if (strncmp (curr
->name
, name
, len
) == 0)
8382 if (strncmp (".end", name
+ len
, 4) == 0)
8384 *result
= curr
->vma
+ curr
->size
/ bfd_octets_per_byte (abfd
);
8388 /* Insert more pseudo-section names here, if you like. */
8396 undefined_reference (const char *reftype
, const char *name
)
8398 /* xgettext:c-format */
8399 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
8404 eval_symbol (bfd_vma
*result
,
8407 struct elf_final_link_info
*flinfo
,
8409 Elf_Internal_Sym
*isymbuf
,
8418 const char *sym
= *symp
;
8420 bfd_boolean symbol_is_section
= FALSE
;
8425 if (len
< 1 || len
> sizeof (symbuf
))
8427 bfd_set_error (bfd_error_invalid_operation
);
8440 *result
= strtoul (sym
, (char **) symp
, 16);
8444 symbol_is_section
= TRUE
;
8448 symlen
= strtol (sym
, (char **) symp
, 10);
8449 sym
= *symp
+ 1; /* Skip the trailing ':'. */
8451 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
8453 bfd_set_error (bfd_error_invalid_operation
);
8457 memcpy (symbuf
, sym
, symlen
);
8458 symbuf
[symlen
] = '\0';
8459 *symp
= sym
+ symlen
;
8461 /* Is it always possible, with complex symbols, that gas "mis-guessed"
8462 the symbol as a section, or vice-versa. so we're pretty liberal in our
8463 interpretation here; section means "try section first", not "must be a
8464 section", and likewise with symbol. */
8466 if (symbol_is_section
)
8468 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
, input_bfd
)
8469 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
8470 isymbuf
, locsymcount
))
8472 undefined_reference ("section", symbuf
);
8478 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
8479 isymbuf
, locsymcount
)
8480 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
8483 undefined_reference ("symbol", symbuf
);
8490 /* All that remains are operators. */
8492 #define UNARY_OP(op) \
8493 if (strncmp (sym, #op, strlen (#op)) == 0) \
8495 sym += strlen (#op); \
8499 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
8500 isymbuf, locsymcount, signed_p)) \
8503 *result = op ((bfd_signed_vma) a); \
8509 #define BINARY_OP(op) \
8510 if (strncmp (sym, #op, strlen (#op)) == 0) \
8512 sym += strlen (#op); \
8516 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
8517 isymbuf, locsymcount, signed_p)) \
8520 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
8521 isymbuf, locsymcount, signed_p)) \
8524 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
8554 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
8555 bfd_set_error (bfd_error_invalid_operation
);
8561 put_value (bfd_vma size
,
8562 unsigned long chunksz
,
8567 location
+= (size
- chunksz
);
8569 for (; size
; size
-= chunksz
, location
-= chunksz
)
8574 bfd_put_8 (input_bfd
, x
, location
);
8578 bfd_put_16 (input_bfd
, x
, location
);
8582 bfd_put_32 (input_bfd
, x
, location
);
8583 /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */
8589 bfd_put_64 (input_bfd
, x
, location
);
8590 /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */
8603 get_value (bfd_vma size
,
8604 unsigned long chunksz
,
8611 /* Sanity checks. */
8612 BFD_ASSERT (chunksz
<= sizeof (x
)
8615 && (size
% chunksz
) == 0
8616 && input_bfd
!= NULL
8617 && location
!= NULL
);
8619 if (chunksz
== sizeof (x
))
8621 BFD_ASSERT (size
== chunksz
);
8623 /* Make sure that we do not perform an undefined shift operation.
8624 We know that size == chunksz so there will only be one iteration
8625 of the loop below. */
8629 shift
= 8 * chunksz
;
8631 for (; size
; size
-= chunksz
, location
+= chunksz
)
8636 x
= (x
<< shift
) | bfd_get_8 (input_bfd
, location
);
8639 x
= (x
<< shift
) | bfd_get_16 (input_bfd
, location
);
8642 x
= (x
<< shift
) | bfd_get_32 (input_bfd
, location
);
8646 x
= (x
<< shift
) | bfd_get_64 (input_bfd
, location
);
8657 decode_complex_addend (unsigned long *start
, /* in bits */
8658 unsigned long *oplen
, /* in bits */
8659 unsigned long *len
, /* in bits */
8660 unsigned long *wordsz
, /* in bytes */
8661 unsigned long *chunksz
, /* in bytes */
8662 unsigned long *lsb0_p
,
8663 unsigned long *signed_p
,
8664 unsigned long *trunc_p
,
8665 unsigned long encoded
)
8667 * start
= encoded
& 0x3F;
8668 * len
= (encoded
>> 6) & 0x3F;
8669 * oplen
= (encoded
>> 12) & 0x3F;
8670 * wordsz
= (encoded
>> 18) & 0xF;
8671 * chunksz
= (encoded
>> 22) & 0xF;
8672 * lsb0_p
= (encoded
>> 27) & 1;
8673 * signed_p
= (encoded
>> 28) & 1;
8674 * trunc_p
= (encoded
>> 29) & 1;
8677 bfd_reloc_status_type
8678 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
8679 asection
*input_section ATTRIBUTE_UNUSED
,
8681 Elf_Internal_Rela
*rel
,
8684 bfd_vma shift
, x
, mask
;
8685 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
8686 bfd_reloc_status_type r
;
8688 /* Perform this reloc, since it is complex.
8689 (this is not to say that it necessarily refers to a complex
8690 symbol; merely that it is a self-describing CGEN based reloc.
8691 i.e. the addend has the complete reloc information (bit start, end,
8692 word size, etc) encoded within it.). */
8694 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
8695 &chunksz
, &lsb0_p
, &signed_p
,
8696 &trunc_p
, rel
->r_addend
);
8698 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
8701 shift
= (start
+ 1) - len
;
8703 shift
= (8 * wordsz
) - (start
+ len
);
8705 x
= get_value (wordsz
, chunksz
, input_bfd
,
8706 contents
+ rel
->r_offset
* bfd_octets_per_byte (input_bfd
));
8709 printf ("Doing complex reloc: "
8710 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
8711 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
8712 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
8713 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
8714 oplen
, (unsigned long) x
, (unsigned long) mask
,
8715 (unsigned long) relocation
);
8720 /* Now do an overflow check. */
8721 r
= bfd_check_overflow ((signed_p
8722 ? complain_overflow_signed
8723 : complain_overflow_unsigned
),
8724 len
, 0, (8 * wordsz
),
8728 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
8731 printf (" relocation: %8.8lx\n"
8732 " shifted mask: %8.8lx\n"
8733 " shifted/masked reloc: %8.8lx\n"
8734 " result: %8.8lx\n",
8735 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
8736 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
8738 put_value (wordsz
, chunksz
, input_bfd
, x
,
8739 contents
+ rel
->r_offset
* bfd_octets_per_byte (input_bfd
));
8743 /* Functions to read r_offset from external (target order) reloc
8744 entry. Faster than bfd_getl32 et al, because we let the compiler
8745 know the value is aligned. */
8748 ext32l_r_offset (const void *p
)
8755 const union aligned32
*a
8756 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
8758 uint32_t aval
= ( (uint32_t) a
->c
[0]
8759 | (uint32_t) a
->c
[1] << 8
8760 | (uint32_t) a
->c
[2] << 16
8761 | (uint32_t) a
->c
[3] << 24);
8766 ext32b_r_offset (const void *p
)
8773 const union aligned32
*a
8774 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
8776 uint32_t aval
= ( (uint32_t) a
->c
[0] << 24
8777 | (uint32_t) a
->c
[1] << 16
8778 | (uint32_t) a
->c
[2] << 8
8779 | (uint32_t) a
->c
[3]);
8783 #ifdef BFD_HOST_64_BIT
8785 ext64l_r_offset (const void *p
)
8792 const union aligned64
*a
8793 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
8795 uint64_t aval
= ( (uint64_t) a
->c
[0]
8796 | (uint64_t) a
->c
[1] << 8
8797 | (uint64_t) a
->c
[2] << 16
8798 | (uint64_t) a
->c
[3] << 24
8799 | (uint64_t) a
->c
[4] << 32
8800 | (uint64_t) a
->c
[5] << 40
8801 | (uint64_t) a
->c
[6] << 48
8802 | (uint64_t) a
->c
[7] << 56);
8807 ext64b_r_offset (const void *p
)
8814 const union aligned64
*a
8815 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
8817 uint64_t aval
= ( (uint64_t) a
->c
[0] << 56
8818 | (uint64_t) a
->c
[1] << 48
8819 | (uint64_t) a
->c
[2] << 40
8820 | (uint64_t) a
->c
[3] << 32
8821 | (uint64_t) a
->c
[4] << 24
8822 | (uint64_t) a
->c
[5] << 16
8823 | (uint64_t) a
->c
[6] << 8
8824 | (uint64_t) a
->c
[7]);
8829 /* When performing a relocatable link, the input relocations are
8830 preserved. But, if they reference global symbols, the indices
8831 referenced must be updated. Update all the relocations found in
8835 elf_link_adjust_relocs (bfd
*abfd
,
8837 struct bfd_elf_section_reloc_data
*reldata
,
8839 struct bfd_link_info
*info
)
8842 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8844 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8845 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8846 bfd_vma r_type_mask
;
8848 unsigned int count
= reldata
->count
;
8849 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
8851 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
8853 swap_in
= bed
->s
->swap_reloc_in
;
8854 swap_out
= bed
->s
->swap_reloc_out
;
8856 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
8858 swap_in
= bed
->s
->swap_reloca_in
;
8859 swap_out
= bed
->s
->swap_reloca_out
;
8864 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
8867 if (bed
->s
->arch_size
== 32)
8874 r_type_mask
= 0xffffffff;
8878 erela
= reldata
->hdr
->contents
;
8879 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
8881 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
8884 if (*rel_hash
== NULL
)
8887 if ((*rel_hash
)->indx
== -2
8888 && info
->gc_sections
8889 && ! info
->gc_keep_exported
)
8891 /* PR 21524: Let the user know if a symbol was removed by garbage collection. */
8892 _bfd_error_handler (_("%pB:%pA: error: relocation references symbol %s which was removed by garbage collection"),
8894 (*rel_hash
)->root
.root
.string
);
8895 _bfd_error_handler (_("%pB:%pA: error: try relinking with --gc-keep-exported enabled"),
8897 bfd_set_error (bfd_error_invalid_operation
);
8900 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
8902 (*swap_in
) (abfd
, erela
, irela
);
8903 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
8904 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
8905 | (irela
[j
].r_info
& r_type_mask
));
8906 (*swap_out
) (abfd
, irela
, erela
);
8909 if (bed
->elf_backend_update_relocs
)
8910 (*bed
->elf_backend_update_relocs
) (sec
, reldata
);
8912 if (sort
&& count
!= 0)
8914 bfd_vma (*ext_r_off
) (const void *);
8917 bfd_byte
*base
, *end
, *p
, *loc
;
8918 bfd_byte
*buf
= NULL
;
8920 if (bed
->s
->arch_size
== 32)
8922 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
8923 ext_r_off
= ext32l_r_offset
;
8924 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
8925 ext_r_off
= ext32b_r_offset
;
8931 #ifdef BFD_HOST_64_BIT
8932 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
8933 ext_r_off
= ext64l_r_offset
;
8934 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
8935 ext_r_off
= ext64b_r_offset
;
8941 /* Must use a stable sort here. A modified insertion sort,
8942 since the relocs are mostly sorted already. */
8943 elt_size
= reldata
->hdr
->sh_entsize
;
8944 base
= reldata
->hdr
->contents
;
8945 end
= base
+ count
* elt_size
;
8946 if (elt_size
> sizeof (Elf64_External_Rela
))
8949 /* Ensure the first element is lowest. This acts as a sentinel,
8950 speeding the main loop below. */
8951 r_off
= (*ext_r_off
) (base
);
8952 for (p
= loc
= base
; (p
+= elt_size
) < end
; )
8954 bfd_vma r_off2
= (*ext_r_off
) (p
);
8963 /* Don't just swap *base and *loc as that changes the order
8964 of the original base[0] and base[1] if they happen to
8965 have the same r_offset. */
8966 bfd_byte onebuf
[sizeof (Elf64_External_Rela
)];
8967 memcpy (onebuf
, loc
, elt_size
);
8968 memmove (base
+ elt_size
, base
, loc
- base
);
8969 memcpy (base
, onebuf
, elt_size
);
8972 for (p
= base
+ elt_size
; (p
+= elt_size
) < end
; )
8974 /* base to p is sorted, *p is next to insert. */
8975 r_off
= (*ext_r_off
) (p
);
8976 /* Search the sorted region for location to insert. */
8978 while (r_off
< (*ext_r_off
) (loc
))
8983 /* Chances are there is a run of relocs to insert here,
8984 from one of more input files. Files are not always
8985 linked in order due to the way elf_link_input_bfd is
8986 called. See pr17666. */
8987 size_t sortlen
= p
- loc
;
8988 bfd_vma r_off2
= (*ext_r_off
) (loc
);
8989 size_t runlen
= elt_size
;
8990 size_t buf_size
= 96 * 1024;
8991 while (p
+ runlen
< end
8992 && (sortlen
<= buf_size
8993 || runlen
+ elt_size
<= buf_size
)
8994 && r_off2
> (*ext_r_off
) (p
+ runlen
))
8998 buf
= bfd_malloc (buf_size
);
9002 if (runlen
< sortlen
)
9004 memcpy (buf
, p
, runlen
);
9005 memmove (loc
+ runlen
, loc
, sortlen
);
9006 memcpy (loc
, buf
, runlen
);
9010 memcpy (buf
, loc
, sortlen
);
9011 memmove (loc
, p
, runlen
);
9012 memcpy (loc
+ runlen
, buf
, sortlen
);
9014 p
+= runlen
- elt_size
;
9017 /* Hashes are no longer valid. */
9018 free (reldata
->hashes
);
9019 reldata
->hashes
= NULL
;
9025 struct elf_link_sort_rela
9031 enum elf_reloc_type_class type
;
9032 /* We use this as an array of size int_rels_per_ext_rel. */
9033 Elf_Internal_Rela rela
[1];
9037 elf_link_sort_cmp1 (const void *A
, const void *B
)
9039 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
9040 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
9041 int relativea
, relativeb
;
9043 relativea
= a
->type
== reloc_class_relative
;
9044 relativeb
= b
->type
== reloc_class_relative
;
9046 if (relativea
< relativeb
)
9048 if (relativea
> relativeb
)
9050 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
9052 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
9054 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
9056 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
9062 elf_link_sort_cmp2 (const void *A
, const void *B
)
9064 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
9065 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
9067 if (a
->type
< b
->type
)
9069 if (a
->type
> b
->type
)
9071 if (a
->u
.offset
< b
->u
.offset
)
9073 if (a
->u
.offset
> b
->u
.offset
)
9075 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
9077 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
9083 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
9085 asection
*dynamic_relocs
;
9088 bfd_size_type count
, size
;
9089 size_t i
, ret
, sort_elt
, ext_size
;
9090 bfd_byte
*sort
, *s_non_relative
, *p
;
9091 struct elf_link_sort_rela
*sq
;
9092 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
9093 int i2e
= bed
->s
->int_rels_per_ext_rel
;
9094 unsigned int opb
= bfd_octets_per_byte (abfd
);
9095 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
9096 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
9097 struct bfd_link_order
*lo
;
9099 bfd_boolean use_rela
;
9101 /* Find a dynamic reloc section. */
9102 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
9103 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
9104 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
9105 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
9107 bfd_boolean use_rela_initialised
= FALSE
;
9109 /* This is just here to stop gcc from complaining.
9110 Its initialization checking code is not perfect. */
9113 /* Both sections are present. Examine the sizes
9114 of the indirect sections to help us choose. */
9115 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9116 if (lo
->type
== bfd_indirect_link_order
)
9118 asection
*o
= lo
->u
.indirect
.section
;
9120 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
9122 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9123 /* Section size is divisible by both rel and rela sizes.
9124 It is of no help to us. */
9128 /* Section size is only divisible by rela. */
9129 if (use_rela_initialised
&& !use_rela
)
9131 _bfd_error_handler (_("%pB: unable to sort relocs - "
9132 "they are in more than one size"),
9134 bfd_set_error (bfd_error_invalid_operation
);
9140 use_rela_initialised
= TRUE
;
9144 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9146 /* Section size is only divisible by rel. */
9147 if (use_rela_initialised
&& use_rela
)
9149 _bfd_error_handler (_("%pB: unable to sort relocs - "
9150 "they are in more than one size"),
9152 bfd_set_error (bfd_error_invalid_operation
);
9158 use_rela_initialised
= TRUE
;
9163 /* The section size is not divisible by either -
9164 something is wrong. */
9165 _bfd_error_handler (_("%pB: unable to sort relocs - "
9166 "they are of an unknown size"), abfd
);
9167 bfd_set_error (bfd_error_invalid_operation
);
9172 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9173 if (lo
->type
== bfd_indirect_link_order
)
9175 asection
*o
= lo
->u
.indirect
.section
;
9177 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
9179 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9180 /* Section size is divisible by both rel and rela sizes.
9181 It is of no help to us. */
9185 /* Section size is only divisible by rela. */
9186 if (use_rela_initialised
&& !use_rela
)
9188 _bfd_error_handler (_("%pB: unable to sort relocs - "
9189 "they are in more than one size"),
9191 bfd_set_error (bfd_error_invalid_operation
);
9197 use_rela_initialised
= TRUE
;
9201 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9203 /* Section size is only divisible by rel. */
9204 if (use_rela_initialised
&& use_rela
)
9206 _bfd_error_handler (_("%pB: unable to sort relocs - "
9207 "they are in more than one size"),
9209 bfd_set_error (bfd_error_invalid_operation
);
9215 use_rela_initialised
= TRUE
;
9220 /* The section size is not divisible by either -
9221 something is wrong. */
9222 _bfd_error_handler (_("%pB: unable to sort relocs - "
9223 "they are of an unknown size"), abfd
);
9224 bfd_set_error (bfd_error_invalid_operation
);
9229 if (! use_rela_initialised
)
9233 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
9235 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
9242 dynamic_relocs
= rela_dyn
;
9243 ext_size
= bed
->s
->sizeof_rela
;
9244 swap_in
= bed
->s
->swap_reloca_in
;
9245 swap_out
= bed
->s
->swap_reloca_out
;
9249 dynamic_relocs
= rel_dyn
;
9250 ext_size
= bed
->s
->sizeof_rel
;
9251 swap_in
= bed
->s
->swap_reloc_in
;
9252 swap_out
= bed
->s
->swap_reloc_out
;
9256 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9257 if (lo
->type
== bfd_indirect_link_order
)
9258 size
+= lo
->u
.indirect
.section
->size
;
9260 if (size
!= dynamic_relocs
->size
)
9263 sort_elt
= (sizeof (struct elf_link_sort_rela
)
9264 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
9266 count
= dynamic_relocs
->size
/ ext_size
;
9269 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
9273 (*info
->callbacks
->warning
)
9274 (info
, _("not enough memory to sort relocations"), 0, abfd
, 0, 0);
9278 if (bed
->s
->arch_size
== 32)
9279 r_sym_mask
= ~(bfd_vma
) 0xff;
9281 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
9283 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9284 if (lo
->type
== bfd_indirect_link_order
)
9286 bfd_byte
*erel
, *erelend
;
9287 asection
*o
= lo
->u
.indirect
.section
;
9289 if (o
->contents
== NULL
&& o
->size
!= 0)
9291 /* This is a reloc section that is being handled as a normal
9292 section. See bfd_section_from_shdr. We can't combine
9293 relocs in this case. */
9298 erelend
= o
->contents
+ o
->size
;
9299 p
= sort
+ o
->output_offset
* opb
/ ext_size
* sort_elt
;
9301 while (erel
< erelend
)
9303 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9305 (*swap_in
) (abfd
, erel
, s
->rela
);
9306 s
->type
= (*bed
->elf_backend_reloc_type_class
) (info
, o
, s
->rela
);
9307 s
->u
.sym_mask
= r_sym_mask
;
9313 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
9315 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
9317 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9318 if (s
->type
!= reloc_class_relative
)
9324 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
9325 for (; i
< count
; i
++, p
+= sort_elt
)
9327 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
9328 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
9330 sp
->u
.offset
= sq
->rela
->r_offset
;
9333 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
9335 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
9336 if (htab
->srelplt
&& htab
->srelplt
->output_section
== dynamic_relocs
)
9338 /* We have plt relocs in .rela.dyn. */
9339 sq
= (struct elf_link_sort_rela
*) sort
;
9340 for (i
= 0; i
< count
; i
++)
9341 if (sq
[count
- i
- 1].type
!= reloc_class_plt
)
9343 if (i
!= 0 && htab
->srelplt
->size
== i
* ext_size
)
9345 struct bfd_link_order
**plo
;
9346 /* Put srelplt link_order last. This is so the output_offset
9347 set in the next loop is correct for DT_JMPREL. */
9348 for (plo
= &dynamic_relocs
->map_head
.link_order
; *plo
!= NULL
; )
9349 if ((*plo
)->type
== bfd_indirect_link_order
9350 && (*plo
)->u
.indirect
.section
== htab
->srelplt
)
9356 plo
= &(*plo
)->next
;
9359 dynamic_relocs
->map_tail
.link_order
= lo
;
9364 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9365 if (lo
->type
== bfd_indirect_link_order
)
9367 bfd_byte
*erel
, *erelend
;
9368 asection
*o
= lo
->u
.indirect
.section
;
9371 erelend
= o
->contents
+ o
->size
;
9372 o
->output_offset
= (p
- sort
) / sort_elt
* ext_size
/ opb
;
9373 while (erel
< erelend
)
9375 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9376 (*swap_out
) (abfd
, s
->rela
, erel
);
9383 *psec
= dynamic_relocs
;
9387 /* Add a symbol to the output symbol string table. */
9390 elf_link_output_symstrtab (struct elf_final_link_info
*flinfo
,
9392 Elf_Internal_Sym
*elfsym
,
9393 asection
*input_sec
,
9394 struct elf_link_hash_entry
*h
)
9396 int (*output_symbol_hook
)
9397 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
9398 struct elf_link_hash_entry
*);
9399 struct elf_link_hash_table
*hash_table
;
9400 const struct elf_backend_data
*bed
;
9401 bfd_size_type strtabsize
;
9403 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
9405 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9406 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
9407 if (output_symbol_hook
!= NULL
)
9409 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
9416 || (input_sec
->flags
& SEC_EXCLUDE
))
9417 elfsym
->st_name
= (unsigned long) -1;
9420 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
9421 to get the final offset for st_name. */
9423 = (unsigned long) _bfd_elf_strtab_add (flinfo
->symstrtab
,
9425 if (elfsym
->st_name
== (unsigned long) -1)
9429 hash_table
= elf_hash_table (flinfo
->info
);
9430 strtabsize
= hash_table
->strtabsize
;
9431 if (strtabsize
<= hash_table
->strtabcount
)
9433 strtabsize
+= strtabsize
;
9434 hash_table
->strtabsize
= strtabsize
;
9435 strtabsize
*= sizeof (*hash_table
->strtab
);
9437 = (struct elf_sym_strtab
*) bfd_realloc (hash_table
->strtab
,
9439 if (hash_table
->strtab
== NULL
)
9442 hash_table
->strtab
[hash_table
->strtabcount
].sym
= *elfsym
;
9443 hash_table
->strtab
[hash_table
->strtabcount
].dest_index
9444 = hash_table
->strtabcount
;
9445 hash_table
->strtab
[hash_table
->strtabcount
].destshndx_index
9446 = flinfo
->symshndxbuf
? bfd_get_symcount (flinfo
->output_bfd
) : 0;
9448 bfd_get_symcount (flinfo
->output_bfd
) += 1;
9449 hash_table
->strtabcount
+= 1;
9454 /* Swap symbols out to the symbol table and flush the output symbols to
9458 elf_link_swap_symbols_out (struct elf_final_link_info
*flinfo
)
9460 struct elf_link_hash_table
*hash_table
= elf_hash_table (flinfo
->info
);
9463 const struct elf_backend_data
*bed
;
9465 Elf_Internal_Shdr
*hdr
;
9469 if (!hash_table
->strtabcount
)
9472 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
9474 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9476 amt
= bed
->s
->sizeof_sym
* hash_table
->strtabcount
;
9477 symbuf
= (bfd_byte
*) bfd_malloc (amt
);
9481 if (flinfo
->symshndxbuf
)
9483 amt
= sizeof (Elf_External_Sym_Shndx
);
9484 amt
*= bfd_get_symcount (flinfo
->output_bfd
);
9485 flinfo
->symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
9486 if (flinfo
->symshndxbuf
== NULL
)
9493 for (i
= 0; i
< hash_table
->strtabcount
; i
++)
9495 struct elf_sym_strtab
*elfsym
= &hash_table
->strtab
[i
];
9496 if (elfsym
->sym
.st_name
== (unsigned long) -1)
9497 elfsym
->sym
.st_name
= 0;
9500 = (unsigned long) _bfd_elf_strtab_offset (flinfo
->symstrtab
,
9501 elfsym
->sym
.st_name
);
9502 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &elfsym
->sym
,
9503 ((bfd_byte
*) symbuf
9504 + (elfsym
->dest_index
9505 * bed
->s
->sizeof_sym
)),
9506 (flinfo
->symshndxbuf
9507 + elfsym
->destshndx_index
));
9510 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
9511 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
9512 amt
= hash_table
->strtabcount
* bed
->s
->sizeof_sym
;
9513 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) == 0
9514 && bfd_bwrite (symbuf
, amt
, flinfo
->output_bfd
) == amt
)
9516 hdr
->sh_size
+= amt
;
9524 free (hash_table
->strtab
);
9525 hash_table
->strtab
= NULL
;
9530 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
9533 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
9535 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
9536 && sym
->st_shndx
< SHN_LORESERVE
)
9538 /* The gABI doesn't support dynamic symbols in output sections
9541 /* xgettext:c-format */
9542 (_("%pB: too many sections: %d (>= %d)"),
9543 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
9544 bfd_set_error (bfd_error_nonrepresentable_section
);
9550 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
9551 allowing an unsatisfied unversioned symbol in the DSO to match a
9552 versioned symbol that would normally require an explicit version.
9553 We also handle the case that a DSO references a hidden symbol
9554 which may be satisfied by a versioned symbol in another DSO. */
9557 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
9558 const struct elf_backend_data
*bed
,
9559 struct elf_link_hash_entry
*h
)
9562 struct elf_link_loaded_list
*loaded
;
9564 if (!is_elf_hash_table (info
->hash
))
9567 /* Check indirect symbol. */
9568 while (h
->root
.type
== bfd_link_hash_indirect
)
9569 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9571 switch (h
->root
.type
)
9577 case bfd_link_hash_undefined
:
9578 case bfd_link_hash_undefweak
:
9579 abfd
= h
->root
.u
.undef
.abfd
;
9581 || (abfd
->flags
& DYNAMIC
) == 0
9582 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
9586 case bfd_link_hash_defined
:
9587 case bfd_link_hash_defweak
:
9588 abfd
= h
->root
.u
.def
.section
->owner
;
9591 case bfd_link_hash_common
:
9592 abfd
= h
->root
.u
.c
.p
->section
->owner
;
9595 BFD_ASSERT (abfd
!= NULL
);
9597 for (loaded
= elf_hash_table (info
)->loaded
;
9599 loaded
= loaded
->next
)
9602 Elf_Internal_Shdr
*hdr
;
9606 Elf_Internal_Shdr
*versymhdr
;
9607 Elf_Internal_Sym
*isym
;
9608 Elf_Internal_Sym
*isymend
;
9609 Elf_Internal_Sym
*isymbuf
;
9610 Elf_External_Versym
*ever
;
9611 Elf_External_Versym
*extversym
;
9613 input
= loaded
->abfd
;
9615 /* We check each DSO for a possible hidden versioned definition. */
9617 || (input
->flags
& DYNAMIC
) == 0
9618 || elf_dynversym (input
) == 0)
9621 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
9623 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9624 if (elf_bad_symtab (input
))
9626 extsymcount
= symcount
;
9631 extsymcount
= symcount
- hdr
->sh_info
;
9632 extsymoff
= hdr
->sh_info
;
9635 if (extsymcount
== 0)
9638 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
9640 if (isymbuf
== NULL
)
9643 /* Read in any version definitions. */
9644 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
9645 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
9646 if (extversym
== NULL
)
9649 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
9650 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
9651 != versymhdr
->sh_size
))
9659 ever
= extversym
+ extsymoff
;
9660 isymend
= isymbuf
+ extsymcount
;
9661 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
9664 Elf_Internal_Versym iver
;
9665 unsigned short version_index
;
9667 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
9668 || isym
->st_shndx
== SHN_UNDEF
)
9671 name
= bfd_elf_string_from_elf_section (input
,
9674 if (strcmp (name
, h
->root
.root
.string
) != 0)
9677 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
9679 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
9681 && h
->forced_local
))
9683 /* If we have a non-hidden versioned sym, then it should
9684 have provided a definition for the undefined sym unless
9685 it is defined in a non-shared object and forced local.
9690 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
9691 if (version_index
== 1 || version_index
== 2)
9693 /* This is the base or first version. We can use it. */
9707 /* Convert ELF common symbol TYPE. */
9710 elf_link_convert_common_type (struct bfd_link_info
*info
, int type
)
9712 /* Commom symbol can only appear in relocatable link. */
9713 if (!bfd_link_relocatable (info
))
9715 switch (info
->elf_stt_common
)
9719 case elf_stt_common
:
9722 case no_elf_stt_common
:
9729 /* Add an external symbol to the symbol table. This is called from
9730 the hash table traversal routine. When generating a shared object,
9731 we go through the symbol table twice. The first time we output
9732 anything that might have been forced to local scope in a version
9733 script. The second time we output the symbols that are still
9737 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
9739 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
9740 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
9741 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
9743 Elf_Internal_Sym sym
;
9744 asection
*input_sec
;
9745 const struct elf_backend_data
*bed
;
9750 if (h
->root
.type
== bfd_link_hash_warning
)
9752 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9753 if (h
->root
.type
== bfd_link_hash_new
)
9757 /* Decide whether to output this symbol in this pass. */
9758 if (eoinfo
->localsyms
)
9760 if (!h
->forced_local
)
9765 if (h
->forced_local
)
9769 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9771 if (h
->root
.type
== bfd_link_hash_undefined
)
9773 /* If we have an undefined symbol reference here then it must have
9774 come from a shared library that is being linked in. (Undefined
9775 references in regular files have already been handled unless
9776 they are in unreferenced sections which are removed by garbage
9778 bfd_boolean ignore_undef
= FALSE
;
9780 /* Some symbols may be special in that the fact that they're
9781 undefined can be safely ignored - let backend determine that. */
9782 if (bed
->elf_backend_ignore_undef_symbol
)
9783 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
9785 /* If we are reporting errors for this situation then do so now. */
9787 && h
->ref_dynamic_nonweak
9788 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
9789 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
9790 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
9791 (*flinfo
->info
->callbacks
->undefined_symbol
)
9792 (flinfo
->info
, h
->root
.root
.string
,
9793 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
,
9795 flinfo
->info
->unresolved_syms_in_shared_libs
== RM_GENERATE_ERROR
);
9797 /* Strip a global symbol defined in a discarded section. */
9802 /* We should also warn if a forced local symbol is referenced from
9803 shared libraries. */
9804 if (bfd_link_executable (flinfo
->info
)
9809 && h
->ref_dynamic_nonweak
9810 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
9814 struct elf_link_hash_entry
*hi
= h
;
9816 /* Check indirect symbol. */
9817 while (hi
->root
.type
== bfd_link_hash_indirect
)
9818 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
9820 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
9821 /* xgettext:c-format */
9822 msg
= _("%pB: internal symbol `%s' in %pB is referenced by DSO");
9823 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
9824 /* xgettext:c-format */
9825 msg
= _("%pB: hidden symbol `%s' in %pB is referenced by DSO");
9827 /* xgettext:c-format */
9828 msg
= _("%pB: local symbol `%s' in %pB is referenced by DSO");
9829 def_bfd
= flinfo
->output_bfd
;
9830 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
9831 def_bfd
= hi
->root
.u
.def
.section
->owner
;
9832 _bfd_error_handler (msg
, flinfo
->output_bfd
,
9833 h
->root
.root
.string
, def_bfd
);
9834 bfd_set_error (bfd_error_bad_value
);
9835 eoinfo
->failed
= TRUE
;
9839 /* We don't want to output symbols that have never been mentioned by
9840 a regular file, or that we have been told to strip. However, if
9841 h->indx is set to -2, the symbol is used by a reloc and we must
9846 else if ((h
->def_dynamic
9848 || h
->root
.type
== bfd_link_hash_new
)
9852 else if (flinfo
->info
->strip
== strip_all
)
9854 else if (flinfo
->info
->strip
== strip_some
9855 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
9856 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
9858 else if ((h
->root
.type
== bfd_link_hash_defined
9859 || h
->root
.type
== bfd_link_hash_defweak
)
9860 && ((flinfo
->info
->strip_discarded
9861 && discarded_section (h
->root
.u
.def
.section
))
9862 || ((h
->root
.u
.def
.section
->flags
& SEC_LINKER_CREATED
) == 0
9863 && h
->root
.u
.def
.section
->owner
!= NULL
9864 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
9866 else if ((h
->root
.type
== bfd_link_hash_undefined
9867 || h
->root
.type
== bfd_link_hash_undefweak
)
9868 && h
->root
.u
.undef
.abfd
!= NULL
9869 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
9874 /* If we're stripping it, and it's not a dynamic symbol, there's
9875 nothing else to do. However, if it is a forced local symbol or
9876 an ifunc symbol we need to give the backend finish_dynamic_symbol
9877 function a chance to make it dynamic. */
9880 && type
!= STT_GNU_IFUNC
9881 && !h
->forced_local
)
9885 sym
.st_size
= h
->size
;
9886 sym
.st_other
= h
->other
;
9887 switch (h
->root
.type
)
9890 case bfd_link_hash_new
:
9891 case bfd_link_hash_warning
:
9895 case bfd_link_hash_undefined
:
9896 case bfd_link_hash_undefweak
:
9897 input_sec
= bfd_und_section_ptr
;
9898 sym
.st_shndx
= SHN_UNDEF
;
9901 case bfd_link_hash_defined
:
9902 case bfd_link_hash_defweak
:
9904 input_sec
= h
->root
.u
.def
.section
;
9905 if (input_sec
->output_section
!= NULL
)
9908 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
9909 input_sec
->output_section
);
9910 if (sym
.st_shndx
== SHN_BAD
)
9913 /* xgettext:c-format */
9914 (_("%pB: could not find output section %pA for input section %pA"),
9915 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
9916 bfd_set_error (bfd_error_nonrepresentable_section
);
9917 eoinfo
->failed
= TRUE
;
9921 /* ELF symbols in relocatable files are section relative,
9922 but in nonrelocatable files they are virtual
9924 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
9925 if (!bfd_link_relocatable (flinfo
->info
))
9927 sym
.st_value
+= input_sec
->output_section
->vma
;
9928 if (h
->type
== STT_TLS
)
9930 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
9931 if (tls_sec
!= NULL
)
9932 sym
.st_value
-= tls_sec
->vma
;
9938 BFD_ASSERT (input_sec
->owner
== NULL
9939 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
9940 sym
.st_shndx
= SHN_UNDEF
;
9941 input_sec
= bfd_und_section_ptr
;
9946 case bfd_link_hash_common
:
9947 input_sec
= h
->root
.u
.c
.p
->section
;
9948 sym
.st_shndx
= bed
->common_section_index (input_sec
);
9949 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
9952 case bfd_link_hash_indirect
:
9953 /* These symbols are created by symbol versioning. They point
9954 to the decorated version of the name. For example, if the
9955 symbol foo@@GNU_1.2 is the default, which should be used when
9956 foo is used with no version, then we add an indirect symbol
9957 foo which points to foo@@GNU_1.2. We ignore these symbols,
9958 since the indirected symbol is already in the hash table. */
9962 if (type
== STT_COMMON
|| type
== STT_OBJECT
)
9963 switch (h
->root
.type
)
9965 case bfd_link_hash_common
:
9966 type
= elf_link_convert_common_type (flinfo
->info
, type
);
9968 case bfd_link_hash_defined
:
9969 case bfd_link_hash_defweak
:
9970 if (bed
->common_definition (&sym
))
9971 type
= elf_link_convert_common_type (flinfo
->info
, type
);
9975 case bfd_link_hash_undefined
:
9976 case bfd_link_hash_undefweak
:
9982 if (h
->forced_local
)
9984 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, type
);
9985 /* Turn off visibility on local symbol. */
9986 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
9988 /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */
9989 else if (h
->unique_global
&& h
->def_regular
)
9990 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, type
);
9991 else if (h
->root
.type
== bfd_link_hash_undefweak
9992 || h
->root
.type
== bfd_link_hash_defweak
)
9993 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, type
);
9995 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
9996 sym
.st_target_internal
= h
->target_internal
;
9998 /* Give the processor backend a chance to tweak the symbol value,
9999 and also to finish up anything that needs to be done for this
10000 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
10001 forced local syms when non-shared is due to a historical quirk.
10002 STT_GNU_IFUNC symbol must go through PLT. */
10003 if ((h
->type
== STT_GNU_IFUNC
10005 && !bfd_link_relocatable (flinfo
->info
))
10006 || ((h
->dynindx
!= -1
10007 || h
->forced_local
)
10008 && ((bfd_link_pic (flinfo
->info
)
10009 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
10010 || h
->root
.type
!= bfd_link_hash_undefweak
))
10011 || !h
->forced_local
)
10012 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
10014 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
10015 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
10017 eoinfo
->failed
= TRUE
;
10022 /* If we are marking the symbol as undefined, and there are no
10023 non-weak references to this symbol from a regular object, then
10024 mark the symbol as weak undefined; if there are non-weak
10025 references, mark the symbol as strong. We can't do this earlier,
10026 because it might not be marked as undefined until the
10027 finish_dynamic_symbol routine gets through with it. */
10028 if (sym
.st_shndx
== SHN_UNDEF
10030 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
10031 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
10034 type
= ELF_ST_TYPE (sym
.st_info
);
10036 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
10037 if (type
== STT_GNU_IFUNC
)
10040 if (h
->ref_regular_nonweak
)
10041 bindtype
= STB_GLOBAL
;
10043 bindtype
= STB_WEAK
;
10044 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
10047 /* If this is a symbol defined in a dynamic library, don't use the
10048 symbol size from the dynamic library. Relinking an executable
10049 against a new library may introduce gratuitous changes in the
10050 executable's symbols if we keep the size. */
10051 if (sym
.st_shndx
== SHN_UNDEF
10056 /* If a non-weak symbol with non-default visibility is not defined
10057 locally, it is a fatal error. */
10058 if (!bfd_link_relocatable (flinfo
->info
)
10059 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
10060 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
10061 && h
->root
.type
== bfd_link_hash_undefined
10062 && !h
->def_regular
)
10066 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
10067 /* xgettext:c-format */
10068 msg
= _("%pB: protected symbol `%s' isn't defined");
10069 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
10070 /* xgettext:c-format */
10071 msg
= _("%pB: internal symbol `%s' isn't defined");
10073 /* xgettext:c-format */
10074 msg
= _("%pB: hidden symbol `%s' isn't defined");
10075 _bfd_error_handler (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
10076 bfd_set_error (bfd_error_bad_value
);
10077 eoinfo
->failed
= TRUE
;
10081 /* If this symbol should be put in the .dynsym section, then put it
10082 there now. We already know the symbol index. We also fill in
10083 the entry in the .hash section. */
10084 if (h
->dynindx
!= -1
10085 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
10086 && elf_hash_table (flinfo
->info
)->dynsym
!= NULL
10087 && !discarded_section (elf_hash_table (flinfo
->info
)->dynsym
))
10091 /* Since there is no version information in the dynamic string,
10092 if there is no version info in symbol version section, we will
10093 have a run-time problem if not linking executable, referenced
10094 by shared library, or not bound locally. */
10095 if (h
->verinfo
.verdef
== NULL
10096 && (!bfd_link_executable (flinfo
->info
)
10098 || !h
->def_regular
))
10100 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
10102 if (p
&& p
[1] != '\0')
10105 /* xgettext:c-format */
10106 (_("%pB: no symbol version section for versioned symbol `%s'"),
10107 flinfo
->output_bfd
, h
->root
.root
.string
);
10108 eoinfo
->failed
= TRUE
;
10113 sym
.st_name
= h
->dynstr_index
;
10114 esym
= (elf_hash_table (flinfo
->info
)->dynsym
->contents
10115 + h
->dynindx
* bed
->s
->sizeof_sym
);
10116 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
10118 eoinfo
->failed
= TRUE
;
10121 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
10123 if (flinfo
->hash_sec
!= NULL
)
10125 size_t hash_entry_size
;
10126 bfd_byte
*bucketpos
;
10128 size_t bucketcount
;
10131 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
10132 bucket
= h
->u
.elf_hash_value
% bucketcount
;
10135 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
10136 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
10137 + (bucket
+ 2) * hash_entry_size
);
10138 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
10139 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
10141 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
10142 ((bfd_byte
*) flinfo
->hash_sec
->contents
10143 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
10146 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
10148 Elf_Internal_Versym iversym
;
10149 Elf_External_Versym
*eversym
;
10151 if (!h
->def_regular
)
10153 if (h
->verinfo
.verdef
== NULL
10154 || (elf_dyn_lib_class (h
->verinfo
.verdef
->vd_bfd
)
10155 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
| DYN_NO_NEEDED
)))
10156 iversym
.vs_vers
= 0;
10158 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
10162 if (h
->verinfo
.vertree
== NULL
)
10163 iversym
.vs_vers
= 1;
10165 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
10166 if (flinfo
->info
->create_default_symver
)
10170 /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is
10171 defined locally. */
10172 if (h
->versioned
== versioned_hidden
&& h
->def_regular
)
10173 iversym
.vs_vers
|= VERSYM_HIDDEN
;
10175 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
10176 eversym
+= h
->dynindx
;
10177 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
10181 /* If the symbol is undefined, and we didn't output it to .dynsym,
10182 strip it from .symtab too. Obviously we can't do this for
10183 relocatable output or when needed for --emit-relocs. */
10184 else if (input_sec
== bfd_und_section_ptr
10186 /* PR 22319 Do not strip global undefined symbols marked as being needed. */
10187 && (h
->mark
!= 1 || ELF_ST_BIND (sym
.st_info
) != STB_GLOBAL
)
10188 && !bfd_link_relocatable (flinfo
->info
))
10191 /* Also strip others that we couldn't earlier due to dynamic symbol
10195 if ((input_sec
->flags
& SEC_EXCLUDE
) != 0)
10198 /* Output a FILE symbol so that following locals are not associated
10199 with the wrong input file. We need one for forced local symbols
10200 if we've seen more than one FILE symbol or when we have exactly
10201 one FILE symbol but global symbols are present in a file other
10202 than the one with the FILE symbol. We also need one if linker
10203 defined symbols are present. In practice these conditions are
10204 always met, so just emit the FILE symbol unconditionally. */
10205 if (eoinfo
->localsyms
10206 && !eoinfo
->file_sym_done
10207 && eoinfo
->flinfo
->filesym_count
!= 0)
10209 Elf_Internal_Sym fsym
;
10211 memset (&fsym
, 0, sizeof (fsym
));
10212 fsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10213 fsym
.st_shndx
= SHN_ABS
;
10214 if (!elf_link_output_symstrtab (eoinfo
->flinfo
, NULL
, &fsym
,
10215 bfd_und_section_ptr
, NULL
))
10218 eoinfo
->file_sym_done
= TRUE
;
10221 indx
= bfd_get_symcount (flinfo
->output_bfd
);
10222 ret
= elf_link_output_symstrtab (flinfo
, h
->root
.root
.string
, &sym
,
10226 eoinfo
->failed
= TRUE
;
10231 else if (h
->indx
== -2)
10237 /* Return TRUE if special handling is done for relocs in SEC against
10238 symbols defined in discarded sections. */
10241 elf_section_ignore_discarded_relocs (asection
*sec
)
10243 const struct elf_backend_data
*bed
;
10245 switch (sec
->sec_info_type
)
10247 case SEC_INFO_TYPE_STABS
:
10248 case SEC_INFO_TYPE_EH_FRAME
:
10249 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
10255 bed
= get_elf_backend_data (sec
->owner
);
10256 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
10257 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
10263 /* Return a mask saying how ld should treat relocations in SEC against
10264 symbols defined in discarded sections. If this function returns
10265 COMPLAIN set, ld will issue a warning message. If this function
10266 returns PRETEND set, and the discarded section was link-once and the
10267 same size as the kept link-once section, ld will pretend that the
10268 symbol was actually defined in the kept section. Otherwise ld will
10269 zero the reloc (at least that is the intent, but some cooperation by
10270 the target dependent code is needed, particularly for REL targets). */
10273 _bfd_elf_default_action_discarded (asection
*sec
)
10275 if (sec
->flags
& SEC_DEBUGGING
)
10278 if (strcmp (".eh_frame", sec
->name
) == 0)
10281 if (strcmp (".gcc_except_table", sec
->name
) == 0)
10284 return COMPLAIN
| PRETEND
;
10287 /* Find a match between a section and a member of a section group. */
10290 match_group_member (asection
*sec
, asection
*group
,
10291 struct bfd_link_info
*info
)
10293 asection
*first
= elf_next_in_group (group
);
10294 asection
*s
= first
;
10298 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
10301 s
= elf_next_in_group (s
);
10309 /* Check if the kept section of a discarded section SEC can be used
10310 to replace it. Return the replacement if it is OK. Otherwise return
10314 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
10318 kept
= sec
->kept_section
;
10321 if ((kept
->flags
& SEC_GROUP
) != 0)
10322 kept
= match_group_member (sec
, kept
, info
);
10324 && ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
10325 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
)))
10327 sec
->kept_section
= kept
;
10332 /* Link an input file into the linker output file. This function
10333 handles all the sections and relocations of the input file at once.
10334 This is so that we only have to read the local symbols once, and
10335 don't have to keep them in memory. */
10338 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
10340 int (*relocate_section
)
10341 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
10342 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
10344 Elf_Internal_Shdr
*symtab_hdr
;
10345 size_t locsymcount
;
10347 Elf_Internal_Sym
*isymbuf
;
10348 Elf_Internal_Sym
*isym
;
10349 Elf_Internal_Sym
*isymend
;
10351 asection
**ppsection
;
10353 const struct elf_backend_data
*bed
;
10354 struct elf_link_hash_entry
**sym_hashes
;
10355 bfd_size_type address_size
;
10356 bfd_vma r_type_mask
;
10358 bfd_boolean have_file_sym
= FALSE
;
10360 output_bfd
= flinfo
->output_bfd
;
10361 bed
= get_elf_backend_data (output_bfd
);
10362 relocate_section
= bed
->elf_backend_relocate_section
;
10364 /* If this is a dynamic object, we don't want to do anything here:
10365 we don't want the local symbols, and we don't want the section
10367 if ((input_bfd
->flags
& DYNAMIC
) != 0)
10370 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
10371 if (elf_bad_symtab (input_bfd
))
10373 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
10378 locsymcount
= symtab_hdr
->sh_info
;
10379 extsymoff
= symtab_hdr
->sh_info
;
10382 /* Read the local symbols. */
10383 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
10384 if (isymbuf
== NULL
&& locsymcount
!= 0)
10386 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
10387 flinfo
->internal_syms
,
10388 flinfo
->external_syms
,
10389 flinfo
->locsym_shndx
);
10390 if (isymbuf
== NULL
)
10394 /* Find local symbol sections and adjust values of symbols in
10395 SEC_MERGE sections. Write out those local symbols we know are
10396 going into the output file. */
10397 isymend
= isymbuf
+ locsymcount
;
10398 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
10400 isym
++, pindex
++, ppsection
++)
10404 Elf_Internal_Sym osym
;
10410 if (elf_bad_symtab (input_bfd
))
10412 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
10419 if (isym
->st_shndx
== SHN_UNDEF
)
10420 isec
= bfd_und_section_ptr
;
10421 else if (isym
->st_shndx
== SHN_ABS
)
10422 isec
= bfd_abs_section_ptr
;
10423 else if (isym
->st_shndx
== SHN_COMMON
)
10424 isec
= bfd_com_section_ptr
;
10427 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
10430 /* Don't attempt to output symbols with st_shnx in the
10431 reserved range other than SHN_ABS and SHN_COMMON. */
10432 isec
= bfd_und_section_ptr
;
10434 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
10435 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
10437 _bfd_merged_section_offset (output_bfd
, &isec
,
10438 elf_section_data (isec
)->sec_info
,
10444 /* Don't output the first, undefined, symbol. In fact, don't
10445 output any undefined local symbol. */
10446 if (isec
== bfd_und_section_ptr
)
10449 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
10451 /* We never output section symbols. Instead, we use the
10452 section symbol of the corresponding section in the output
10457 /* If we are stripping all symbols, we don't want to output this
10459 if (flinfo
->info
->strip
== strip_all
)
10462 /* If we are discarding all local symbols, we don't want to
10463 output this one. If we are generating a relocatable output
10464 file, then some of the local symbols may be required by
10465 relocs; we output them below as we discover that they are
10467 if (flinfo
->info
->discard
== discard_all
)
10470 /* If this symbol is defined in a section which we are
10471 discarding, we don't need to keep it. */
10472 if (isym
->st_shndx
!= SHN_UNDEF
10473 && isym
->st_shndx
< SHN_LORESERVE
10474 && bfd_section_removed_from_list (output_bfd
,
10475 isec
->output_section
))
10478 /* Get the name of the symbol. */
10479 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
10484 /* See if we are discarding symbols with this name. */
10485 if ((flinfo
->info
->strip
== strip_some
10486 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
10488 || (((flinfo
->info
->discard
== discard_sec_merge
10489 && (isec
->flags
& SEC_MERGE
)
10490 && !bfd_link_relocatable (flinfo
->info
))
10491 || flinfo
->info
->discard
== discard_l
)
10492 && bfd_is_local_label_name (input_bfd
, name
)))
10495 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
10497 if (input_bfd
->lto_output
)
10498 /* -flto puts a temp file name here. This means builds
10499 are not reproducible. Discard the symbol. */
10501 have_file_sym
= TRUE
;
10502 flinfo
->filesym_count
+= 1;
10504 if (!have_file_sym
)
10506 /* In the absence of debug info, bfd_find_nearest_line uses
10507 FILE symbols to determine the source file for local
10508 function symbols. Provide a FILE symbol here if input
10509 files lack such, so that their symbols won't be
10510 associated with a previous input file. It's not the
10511 source file, but the best we can do. */
10512 have_file_sym
= TRUE
;
10513 flinfo
->filesym_count
+= 1;
10514 memset (&osym
, 0, sizeof (osym
));
10515 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10516 osym
.st_shndx
= SHN_ABS
;
10517 if (!elf_link_output_symstrtab (flinfo
,
10518 (input_bfd
->lto_output
? NULL
10519 : input_bfd
->filename
),
10520 &osym
, bfd_abs_section_ptr
,
10527 /* Adjust the section index for the output file. */
10528 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
10529 isec
->output_section
);
10530 if (osym
.st_shndx
== SHN_BAD
)
10533 /* ELF symbols in relocatable files are section relative, but
10534 in executable files they are virtual addresses. Note that
10535 this code assumes that all ELF sections have an associated
10536 BFD section with a reasonable value for output_offset; below
10537 we assume that they also have a reasonable value for
10538 output_section. Any special sections must be set up to meet
10539 these requirements. */
10540 osym
.st_value
+= isec
->output_offset
;
10541 if (!bfd_link_relocatable (flinfo
->info
))
10543 osym
.st_value
+= isec
->output_section
->vma
;
10544 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
10546 /* STT_TLS symbols are relative to PT_TLS segment base. */
10547 if (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
)
10548 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
10550 osym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (osym
.st_info
),
10555 indx
= bfd_get_symcount (output_bfd
);
10556 ret
= elf_link_output_symstrtab (flinfo
, name
, &osym
, isec
, NULL
);
10563 if (bed
->s
->arch_size
== 32)
10565 r_type_mask
= 0xff;
10571 r_type_mask
= 0xffffffff;
10576 /* Relocate the contents of each section. */
10577 sym_hashes
= elf_sym_hashes (input_bfd
);
10578 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
10580 bfd_byte
*contents
;
10582 if (! o
->linker_mark
)
10584 /* This section was omitted from the link. */
10588 if (!flinfo
->info
->resolve_section_groups
10589 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
10591 /* Deal with the group signature symbol. */
10592 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
10593 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
10594 asection
*osec
= o
->output_section
;
10596 BFD_ASSERT (bfd_link_relocatable (flinfo
->info
));
10597 if (symndx
>= locsymcount
10598 || (elf_bad_symtab (input_bfd
)
10599 && flinfo
->sections
[symndx
] == NULL
))
10601 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
10602 while (h
->root
.type
== bfd_link_hash_indirect
10603 || h
->root
.type
== bfd_link_hash_warning
)
10604 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10605 /* Arrange for symbol to be output. */
10607 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
10609 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
10611 /* We'll use the output section target_index. */
10612 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
10613 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
10617 if (flinfo
->indices
[symndx
] == -1)
10619 /* Otherwise output the local symbol now. */
10620 Elf_Internal_Sym sym
= isymbuf
[symndx
];
10621 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
10626 name
= bfd_elf_string_from_elf_section (input_bfd
,
10627 symtab_hdr
->sh_link
,
10632 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
10634 if (sym
.st_shndx
== SHN_BAD
)
10637 sym
.st_value
+= o
->output_offset
;
10639 indx
= bfd_get_symcount (output_bfd
);
10640 ret
= elf_link_output_symstrtab (flinfo
, name
, &sym
, o
,
10645 flinfo
->indices
[symndx
] = indx
;
10649 elf_section_data (osec
)->this_hdr
.sh_info
10650 = flinfo
->indices
[symndx
];
10654 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
10655 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
10658 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
10660 /* Section was created by _bfd_elf_link_create_dynamic_sections
10665 /* Get the contents of the section. They have been cached by a
10666 relaxation routine. Note that o is a section in an input
10667 file, so the contents field will not have been set by any of
10668 the routines which work on output files. */
10669 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
10671 contents
= elf_section_data (o
)->this_hdr
.contents
;
10672 if (bed
->caches_rawsize
10674 && o
->rawsize
< o
->size
)
10676 memcpy (flinfo
->contents
, contents
, o
->rawsize
);
10677 contents
= flinfo
->contents
;
10682 contents
= flinfo
->contents
;
10683 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
10687 if ((o
->flags
& SEC_RELOC
) != 0)
10689 Elf_Internal_Rela
*internal_relocs
;
10690 Elf_Internal_Rela
*rel
, *relend
;
10691 int action_discarded
;
10694 /* Get the swapped relocs. */
10696 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
10697 flinfo
->internal_relocs
, FALSE
);
10698 if (internal_relocs
== NULL
10699 && o
->reloc_count
> 0)
10702 /* We need to reverse-copy input .ctors/.dtors sections if
10703 they are placed in .init_array/.finit_array for output. */
10704 if (o
->size
> address_size
10705 && ((strncmp (o
->name
, ".ctors", 6) == 0
10706 && strcmp (o
->output_section
->name
,
10707 ".init_array") == 0)
10708 || (strncmp (o
->name
, ".dtors", 6) == 0
10709 && strcmp (o
->output_section
->name
,
10710 ".fini_array") == 0))
10711 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
10713 if (o
->size
* bed
->s
->int_rels_per_ext_rel
10714 != o
->reloc_count
* address_size
)
10717 /* xgettext:c-format */
10718 (_("error: %pB: size of section %pA is not "
10719 "multiple of address size"),
10721 bfd_set_error (bfd_error_bad_value
);
10724 o
->flags
|= SEC_ELF_REVERSE_COPY
;
10727 action_discarded
= -1;
10728 if (!elf_section_ignore_discarded_relocs (o
))
10729 action_discarded
= (*bed
->action_discarded
) (o
);
10731 /* Run through the relocs evaluating complex reloc symbols and
10732 looking for relocs against symbols from discarded sections
10733 or section symbols from removed link-once sections.
10734 Complain about relocs against discarded sections. Zero
10735 relocs against removed link-once sections. */
10737 rel
= internal_relocs
;
10738 relend
= rel
+ o
->reloc_count
;
10739 for ( ; rel
< relend
; rel
++)
10741 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
10742 unsigned int s_type
;
10743 asection
**ps
, *sec
;
10744 struct elf_link_hash_entry
*h
= NULL
;
10745 const char *sym_name
;
10747 if (r_symndx
== STN_UNDEF
)
10750 if (r_symndx
>= locsymcount
10751 || (elf_bad_symtab (input_bfd
)
10752 && flinfo
->sections
[r_symndx
] == NULL
))
10754 h
= sym_hashes
[r_symndx
- extsymoff
];
10756 /* Badly formatted input files can contain relocs that
10757 reference non-existant symbols. Check here so that
10758 we do not seg fault. */
10762 /* xgettext:c-format */
10763 (_("error: %pB contains a reloc (%#" PRIx64
") for section %pA "
10764 "that references a non-existent global symbol"),
10765 input_bfd
, (uint64_t) rel
->r_info
, o
);
10766 bfd_set_error (bfd_error_bad_value
);
10770 while (h
->root
.type
== bfd_link_hash_indirect
10771 || h
->root
.type
== bfd_link_hash_warning
)
10772 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10776 /* If a plugin symbol is referenced from a non-IR file,
10777 mark the symbol as undefined. Note that the
10778 linker may attach linker created dynamic sections
10779 to the plugin bfd. Symbols defined in linker
10780 created sections are not plugin symbols. */
10781 if ((h
->root
.non_ir_ref_regular
10782 || h
->root
.non_ir_ref_dynamic
)
10783 && (h
->root
.type
== bfd_link_hash_defined
10784 || h
->root
.type
== bfd_link_hash_defweak
)
10785 && (h
->root
.u
.def
.section
->flags
10786 & SEC_LINKER_CREATED
) == 0
10787 && h
->root
.u
.def
.section
->owner
!= NULL
10788 && (h
->root
.u
.def
.section
->owner
->flags
10789 & BFD_PLUGIN
) != 0)
10791 h
->root
.type
= bfd_link_hash_undefined
;
10792 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
10796 if (h
->root
.type
== bfd_link_hash_defined
10797 || h
->root
.type
== bfd_link_hash_defweak
)
10798 ps
= &h
->root
.u
.def
.section
;
10800 sym_name
= h
->root
.root
.string
;
10804 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
10806 s_type
= ELF_ST_TYPE (sym
->st_info
);
10807 ps
= &flinfo
->sections
[r_symndx
];
10808 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
10812 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
10813 && !bfd_link_relocatable (flinfo
->info
))
10816 bfd_vma dot
= (rel
->r_offset
10817 + o
->output_offset
+ o
->output_section
->vma
);
10819 printf ("Encountered a complex symbol!");
10820 printf (" (input_bfd %s, section %s, reloc %ld\n",
10821 input_bfd
->filename
, o
->name
,
10822 (long) (rel
- internal_relocs
));
10823 printf (" symbol: idx %8.8lx, name %s\n",
10824 r_symndx
, sym_name
);
10825 printf (" reloc : info %8.8lx, addr %8.8lx\n",
10826 (unsigned long) rel
->r_info
,
10827 (unsigned long) rel
->r_offset
);
10829 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
10830 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
10833 /* Symbol evaluated OK. Update to absolute value. */
10834 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
10839 if (action_discarded
!= -1 && ps
!= NULL
)
10841 /* Complain if the definition comes from a
10842 discarded section. */
10843 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
10845 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
10846 if (action_discarded
& COMPLAIN
)
10847 (*flinfo
->info
->callbacks
->einfo
)
10848 /* xgettext:c-format */
10849 (_("%X`%s' referenced in section `%pA' of %pB: "
10850 "defined in discarded section `%pA' of %pB\n"),
10851 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
10853 /* Try to do the best we can to support buggy old
10854 versions of gcc. Pretend that the symbol is
10855 really defined in the kept linkonce section.
10856 FIXME: This is quite broken. Modifying the
10857 symbol here means we will be changing all later
10858 uses of the symbol, not just in this section. */
10859 if (action_discarded
& PRETEND
)
10863 kept
= _bfd_elf_check_kept_section (sec
,
10875 /* Relocate the section by invoking a back end routine.
10877 The back end routine is responsible for adjusting the
10878 section contents as necessary, and (if using Rela relocs
10879 and generating a relocatable output file) adjusting the
10880 reloc addend as necessary.
10882 The back end routine does not have to worry about setting
10883 the reloc address or the reloc symbol index.
10885 The back end routine is given a pointer to the swapped in
10886 internal symbols, and can access the hash table entries
10887 for the external symbols via elf_sym_hashes (input_bfd).
10889 When generating relocatable output, the back end routine
10890 must handle STB_LOCAL/STT_SECTION symbols specially. The
10891 output symbol is going to be a section symbol
10892 corresponding to the output section, which will require
10893 the addend to be adjusted. */
10895 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
10896 input_bfd
, o
, contents
,
10904 || bfd_link_relocatable (flinfo
->info
)
10905 || flinfo
->info
->emitrelocations
)
10907 Elf_Internal_Rela
*irela
;
10908 Elf_Internal_Rela
*irelaend
, *irelamid
;
10909 bfd_vma last_offset
;
10910 struct elf_link_hash_entry
**rel_hash
;
10911 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
10912 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
10913 unsigned int next_erel
;
10914 bfd_boolean rela_normal
;
10915 struct bfd_elf_section_data
*esdi
, *esdo
;
10917 esdi
= elf_section_data (o
);
10918 esdo
= elf_section_data (o
->output_section
);
10919 rela_normal
= FALSE
;
10921 /* Adjust the reloc addresses and symbol indices. */
10923 irela
= internal_relocs
;
10924 irelaend
= irela
+ o
->reloc_count
;
10925 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
10926 /* We start processing the REL relocs, if any. When we reach
10927 IRELAMID in the loop, we switch to the RELA relocs. */
10929 if (esdi
->rel
.hdr
!= NULL
)
10930 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
10931 * bed
->s
->int_rels_per_ext_rel
);
10932 rel_hash_list
= rel_hash
;
10933 rela_hash_list
= NULL
;
10934 last_offset
= o
->output_offset
;
10935 if (!bfd_link_relocatable (flinfo
->info
))
10936 last_offset
+= o
->output_section
->vma
;
10937 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
10939 unsigned long r_symndx
;
10941 Elf_Internal_Sym sym
;
10943 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
10949 if (irela
== irelamid
)
10951 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
10952 rela_hash_list
= rel_hash
;
10953 rela_normal
= bed
->rela_normal
;
10956 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
10959 if (irela
->r_offset
>= (bfd_vma
) -2)
10961 /* This is a reloc for a deleted entry or somesuch.
10962 Turn it into an R_*_NONE reloc, at the same
10963 offset as the last reloc. elf_eh_frame.c and
10964 bfd_elf_discard_info rely on reloc offsets
10966 irela
->r_offset
= last_offset
;
10968 irela
->r_addend
= 0;
10972 irela
->r_offset
+= o
->output_offset
;
10974 /* Relocs in an executable have to be virtual addresses. */
10975 if (!bfd_link_relocatable (flinfo
->info
))
10976 irela
->r_offset
+= o
->output_section
->vma
;
10978 last_offset
= irela
->r_offset
;
10980 r_symndx
= irela
->r_info
>> r_sym_shift
;
10981 if (r_symndx
== STN_UNDEF
)
10984 if (r_symndx
>= locsymcount
10985 || (elf_bad_symtab (input_bfd
)
10986 && flinfo
->sections
[r_symndx
] == NULL
))
10988 struct elf_link_hash_entry
*rh
;
10989 unsigned long indx
;
10991 /* This is a reloc against a global symbol. We
10992 have not yet output all the local symbols, so
10993 we do not know the symbol index of any global
10994 symbol. We set the rel_hash entry for this
10995 reloc to point to the global hash table entry
10996 for this symbol. The symbol index is then
10997 set at the end of bfd_elf_final_link. */
10998 indx
= r_symndx
- extsymoff
;
10999 rh
= elf_sym_hashes (input_bfd
)[indx
];
11000 while (rh
->root
.type
== bfd_link_hash_indirect
11001 || rh
->root
.type
== bfd_link_hash_warning
)
11002 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
11004 /* Setting the index to -2 tells
11005 elf_link_output_extsym that this symbol is
11006 used by a reloc. */
11007 BFD_ASSERT (rh
->indx
< 0);
11014 /* This is a reloc against a local symbol. */
11017 sym
= isymbuf
[r_symndx
];
11018 sec
= flinfo
->sections
[r_symndx
];
11019 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
11021 /* I suppose the backend ought to fill in the
11022 section of any STT_SECTION symbol against a
11023 processor specific section. */
11024 r_symndx
= STN_UNDEF
;
11025 if (bfd_is_abs_section (sec
))
11027 else if (sec
== NULL
|| sec
->owner
== NULL
)
11029 bfd_set_error (bfd_error_bad_value
);
11034 asection
*osec
= sec
->output_section
;
11036 /* If we have discarded a section, the output
11037 section will be the absolute section. In
11038 case of discarded SEC_MERGE sections, use
11039 the kept section. relocate_section should
11040 have already handled discarded linkonce
11042 if (bfd_is_abs_section (osec
)
11043 && sec
->kept_section
!= NULL
11044 && sec
->kept_section
->output_section
!= NULL
)
11046 osec
= sec
->kept_section
->output_section
;
11047 irela
->r_addend
-= osec
->vma
;
11050 if (!bfd_is_abs_section (osec
))
11052 r_symndx
= osec
->target_index
;
11053 if (r_symndx
== STN_UNDEF
)
11055 irela
->r_addend
+= osec
->vma
;
11056 osec
= _bfd_nearby_section (output_bfd
, osec
,
11058 irela
->r_addend
-= osec
->vma
;
11059 r_symndx
= osec
->target_index
;
11064 /* Adjust the addend according to where the
11065 section winds up in the output section. */
11067 irela
->r_addend
+= sec
->output_offset
;
11071 if (flinfo
->indices
[r_symndx
] == -1)
11073 unsigned long shlink
;
11078 if (flinfo
->info
->strip
== strip_all
)
11080 /* You can't do ld -r -s. */
11081 bfd_set_error (bfd_error_invalid_operation
);
11085 /* This symbol was skipped earlier, but
11086 since it is needed by a reloc, we
11087 must output it now. */
11088 shlink
= symtab_hdr
->sh_link
;
11089 name
= (bfd_elf_string_from_elf_section
11090 (input_bfd
, shlink
, sym
.st_name
));
11094 osec
= sec
->output_section
;
11096 _bfd_elf_section_from_bfd_section (output_bfd
,
11098 if (sym
.st_shndx
== SHN_BAD
)
11101 sym
.st_value
+= sec
->output_offset
;
11102 if (!bfd_link_relocatable (flinfo
->info
))
11104 sym
.st_value
+= osec
->vma
;
11105 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
11107 struct elf_link_hash_table
*htab
11108 = elf_hash_table (flinfo
->info
);
11110 /* STT_TLS symbols are relative to PT_TLS
11112 if (htab
->tls_sec
!= NULL
)
11113 sym
.st_value
-= htab
->tls_sec
->vma
;
11116 = ELF_ST_INFO (ELF_ST_BIND (sym
.st_info
),
11121 indx
= bfd_get_symcount (output_bfd
);
11122 ret
= elf_link_output_symstrtab (flinfo
, name
,
11128 flinfo
->indices
[r_symndx
] = indx
;
11133 r_symndx
= flinfo
->indices
[r_symndx
];
11136 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
11137 | (irela
->r_info
& r_type_mask
));
11140 /* Swap out the relocs. */
11141 input_rel_hdr
= esdi
->rel
.hdr
;
11142 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
11144 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
11149 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
11150 * bed
->s
->int_rels_per_ext_rel
);
11151 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
11154 input_rela_hdr
= esdi
->rela
.hdr
;
11155 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
11157 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
11166 /* Write out the modified section contents. */
11167 if (bed
->elf_backend_write_section
11168 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
11171 /* Section written out. */
11173 else switch (o
->sec_info_type
)
11175 case SEC_INFO_TYPE_STABS
:
11176 if (! (_bfd_write_section_stabs
11178 &elf_hash_table (flinfo
->info
)->stab_info
,
11179 o
, &elf_section_data (o
)->sec_info
, contents
)))
11182 case SEC_INFO_TYPE_MERGE
:
11183 if (! _bfd_write_merged_section (output_bfd
, o
,
11184 elf_section_data (o
)->sec_info
))
11187 case SEC_INFO_TYPE_EH_FRAME
:
11189 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
11194 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
11196 if (! _bfd_elf_write_section_eh_frame_entry (output_bfd
,
11204 if (! (o
->flags
& SEC_EXCLUDE
))
11206 file_ptr offset
= (file_ptr
) o
->output_offset
;
11207 bfd_size_type todo
= o
->size
;
11209 offset
*= bfd_octets_per_byte (output_bfd
);
11211 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
11213 /* Reverse-copy input section to output. */
11216 todo
-= address_size
;
11217 if (! bfd_set_section_contents (output_bfd
,
11225 offset
+= address_size
;
11229 else if (! bfd_set_section_contents (output_bfd
,
11243 /* Generate a reloc when linking an ELF file. This is a reloc
11244 requested by the linker, and does not come from any input file. This
11245 is used to build constructor and destructor tables when linking
11249 elf_reloc_link_order (bfd
*output_bfd
,
11250 struct bfd_link_info
*info
,
11251 asection
*output_section
,
11252 struct bfd_link_order
*link_order
)
11254 reloc_howto_type
*howto
;
11258 struct bfd_elf_section_reloc_data
*reldata
;
11259 struct elf_link_hash_entry
**rel_hash_ptr
;
11260 Elf_Internal_Shdr
*rel_hdr
;
11261 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
11262 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
11265 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
11267 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
11270 bfd_set_error (bfd_error_bad_value
);
11274 addend
= link_order
->u
.reloc
.p
->addend
;
11277 reldata
= &esdo
->rel
;
11278 else if (esdo
->rela
.hdr
)
11279 reldata
= &esdo
->rela
;
11286 /* Figure out the symbol index. */
11287 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
11288 if (link_order
->type
== bfd_section_reloc_link_order
)
11290 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
11291 BFD_ASSERT (indx
!= 0);
11292 *rel_hash_ptr
= NULL
;
11296 struct elf_link_hash_entry
*h
;
11298 /* Treat a reloc against a defined symbol as though it were
11299 actually against the section. */
11300 h
= ((struct elf_link_hash_entry
*)
11301 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
11302 link_order
->u
.reloc
.p
->u
.name
,
11303 FALSE
, FALSE
, TRUE
));
11305 && (h
->root
.type
== bfd_link_hash_defined
11306 || h
->root
.type
== bfd_link_hash_defweak
))
11310 section
= h
->root
.u
.def
.section
;
11311 indx
= section
->output_section
->target_index
;
11312 *rel_hash_ptr
= NULL
;
11313 /* It seems that we ought to add the symbol value to the
11314 addend here, but in practice it has already been added
11315 because it was passed to constructor_callback. */
11316 addend
+= section
->output_section
->vma
+ section
->output_offset
;
11318 else if (h
!= NULL
)
11320 /* Setting the index to -2 tells elf_link_output_extsym that
11321 this symbol is used by a reloc. */
11328 (*info
->callbacks
->unattached_reloc
)
11329 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0);
11334 /* If this is an inplace reloc, we must write the addend into the
11336 if (howto
->partial_inplace
&& addend
!= 0)
11338 bfd_size_type size
;
11339 bfd_reloc_status_type rstat
;
11342 const char *sym_name
;
11344 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
11345 buf
= (bfd_byte
*) bfd_zmalloc (size
);
11346 if (buf
== NULL
&& size
!= 0)
11348 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
11355 case bfd_reloc_outofrange
:
11358 case bfd_reloc_overflow
:
11359 if (link_order
->type
== bfd_section_reloc_link_order
)
11360 sym_name
= bfd_section_name (output_bfd
,
11361 link_order
->u
.reloc
.p
->u
.section
);
11363 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
11364 (*info
->callbacks
->reloc_overflow
) (info
, NULL
, sym_name
,
11365 howto
->name
, addend
, NULL
, NULL
,
11370 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
11372 * bfd_octets_per_byte (output_bfd
),
11379 /* The address of a reloc is relative to the section in a
11380 relocatable file, and is a virtual address in an executable
11382 offset
= link_order
->offset
;
11383 if (! bfd_link_relocatable (info
))
11384 offset
+= output_section
->vma
;
11386 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
11388 irel
[i
].r_offset
= offset
;
11389 irel
[i
].r_info
= 0;
11390 irel
[i
].r_addend
= 0;
11392 if (bed
->s
->arch_size
== 32)
11393 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
11395 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
11397 rel_hdr
= reldata
->hdr
;
11398 erel
= rel_hdr
->contents
;
11399 if (rel_hdr
->sh_type
== SHT_REL
)
11401 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
11402 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
11406 irel
[0].r_addend
= addend
;
11407 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
11408 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
11417 /* Get the output vma of the section pointed to by the sh_link field. */
11420 elf_get_linked_section_vma (struct bfd_link_order
*p
)
11422 Elf_Internal_Shdr
**elf_shdrp
;
11426 s
= p
->u
.indirect
.section
;
11427 elf_shdrp
= elf_elfsections (s
->owner
);
11428 elfsec
= _bfd_elf_section_from_bfd_section (s
->owner
, s
);
11429 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
11431 The Intel C compiler generates SHT_IA_64_UNWIND with
11432 SHF_LINK_ORDER. But it doesn't set the sh_link or
11433 sh_info fields. Hence we could get the situation
11434 where elfsec is 0. */
11437 const struct elf_backend_data
*bed
11438 = get_elf_backend_data (s
->owner
);
11439 if (bed
->link_order_error_handler
)
11440 bed
->link_order_error_handler
11441 /* xgettext:c-format */
11442 (_("%pB: warning: sh_link not set for section `%pA'"), s
->owner
, s
);
11447 s
= elf_shdrp
[elfsec
]->bfd_section
;
11448 return s
->output_section
->vma
+ s
->output_offset
;
11453 /* Compare two sections based on the locations of the sections they are
11454 linked to. Used by elf_fixup_link_order. */
11457 compare_link_order (const void * a
, const void * b
)
11462 apos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)a
);
11463 bpos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)b
);
11466 return apos
> bpos
;
11470 /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
11471 order as their linked sections. Returns false if this could not be done
11472 because an output section includes both ordered and unordered
11473 sections. Ideally we'd do this in the linker proper. */
11476 elf_fixup_link_order (bfd
*abfd
, asection
*o
)
11478 int seen_linkorder
;
11481 struct bfd_link_order
*p
;
11483 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11485 struct bfd_link_order
**sections
;
11486 asection
*s
, *other_sec
, *linkorder_sec
;
11490 linkorder_sec
= NULL
;
11492 seen_linkorder
= 0;
11493 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11495 if (p
->type
== bfd_indirect_link_order
)
11497 s
= p
->u
.indirect
.section
;
11499 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
11500 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
11501 && (elfsec
= _bfd_elf_section_from_bfd_section (sub
, s
))
11502 && elfsec
< elf_numsections (sub
)
11503 && elf_elfsections (sub
)[elfsec
]->sh_flags
& SHF_LINK_ORDER
11504 && elf_elfsections (sub
)[elfsec
]->sh_link
< elf_numsections (sub
))
11518 if (seen_other
&& seen_linkorder
)
11520 if (other_sec
&& linkorder_sec
)
11522 /* xgettext:c-format */
11523 (_("%pA has both ordered [`%pA' in %pB] "
11524 "and unordered [`%pA' in %pB] sections"),
11525 o
, linkorder_sec
, linkorder_sec
->owner
,
11526 other_sec
, other_sec
->owner
);
11529 (_("%pA has both ordered and unordered sections"), o
);
11530 bfd_set_error (bfd_error_bad_value
);
11535 if (!seen_linkorder
)
11538 sections
= (struct bfd_link_order
**)
11539 bfd_malloc (seen_linkorder
* sizeof (struct bfd_link_order
*));
11540 if (sections
== NULL
)
11542 seen_linkorder
= 0;
11544 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11546 sections
[seen_linkorder
++] = p
;
11548 /* Sort the input sections in the order of their linked section. */
11549 qsort (sections
, seen_linkorder
, sizeof (struct bfd_link_order
*),
11550 compare_link_order
);
11552 /* Change the offsets of the sections. */
11554 for (n
= 0; n
< seen_linkorder
; n
++)
11556 s
= sections
[n
]->u
.indirect
.section
;
11557 offset
&= ~(bfd_vma
) 0 << s
->alignment_power
;
11558 s
->output_offset
= offset
/ bfd_octets_per_byte (abfd
);
11559 sections
[n
]->offset
= offset
;
11560 offset
+= sections
[n
]->size
;
11567 /* Generate an import library in INFO->implib_bfd from symbols in ABFD.
11568 Returns TRUE upon success, FALSE otherwise. */
11571 elf_output_implib (bfd
*abfd
, struct bfd_link_info
*info
)
11573 bfd_boolean ret
= FALSE
;
11575 const struct elf_backend_data
*bed
;
11577 enum bfd_architecture arch
;
11579 asymbol
**sympp
= NULL
;
11583 elf_symbol_type
*osymbuf
;
11585 implib_bfd
= info
->out_implib_bfd
;
11586 bed
= get_elf_backend_data (abfd
);
11588 if (!bfd_set_format (implib_bfd
, bfd_object
))
11591 /* Use flag from executable but make it a relocatable object. */
11592 flags
= bfd_get_file_flags (abfd
);
11593 flags
&= ~HAS_RELOC
;
11594 if (!bfd_set_start_address (implib_bfd
, 0)
11595 || !bfd_set_file_flags (implib_bfd
, flags
& ~EXEC_P
))
11598 /* Copy architecture of output file to import library file. */
11599 arch
= bfd_get_arch (abfd
);
11600 mach
= bfd_get_mach (abfd
);
11601 if (!bfd_set_arch_mach (implib_bfd
, arch
, mach
)
11602 && (abfd
->target_defaulted
11603 || bfd_get_arch (abfd
) != bfd_get_arch (implib_bfd
)))
11606 /* Get symbol table size. */
11607 symsize
= bfd_get_symtab_upper_bound (abfd
);
11611 /* Read in the symbol table. */
11612 sympp
= (asymbol
**) xmalloc (symsize
);
11613 symcount
= bfd_canonicalize_symtab (abfd
, sympp
);
11617 /* Allow the BFD backend to copy any private header data it
11618 understands from the output BFD to the import library BFD. */
11619 if (! bfd_copy_private_header_data (abfd
, implib_bfd
))
11622 /* Filter symbols to appear in the import library. */
11623 if (bed
->elf_backend_filter_implib_symbols
)
11624 symcount
= bed
->elf_backend_filter_implib_symbols (abfd
, info
, sympp
,
11627 symcount
= _bfd_elf_filter_global_symbols (abfd
, info
, sympp
, symcount
);
11630 bfd_set_error (bfd_error_no_symbols
);
11631 _bfd_error_handler (_("%pB: no symbol found for import library"),
11637 /* Make symbols absolute. */
11638 osymbuf
= (elf_symbol_type
*) bfd_alloc2 (implib_bfd
, symcount
,
11639 sizeof (*osymbuf
));
11640 for (src_count
= 0; src_count
< symcount
; src_count
++)
11642 memcpy (&osymbuf
[src_count
], (elf_symbol_type
*) sympp
[src_count
],
11643 sizeof (*osymbuf
));
11644 osymbuf
[src_count
].symbol
.section
= bfd_abs_section_ptr
;
11645 osymbuf
[src_count
].internal_elf_sym
.st_shndx
= SHN_ABS
;
11646 osymbuf
[src_count
].symbol
.value
+= sympp
[src_count
]->section
->vma
;
11647 osymbuf
[src_count
].internal_elf_sym
.st_value
=
11648 osymbuf
[src_count
].symbol
.value
;
11649 sympp
[src_count
] = &osymbuf
[src_count
].symbol
;
11652 bfd_set_symtab (implib_bfd
, sympp
, symcount
);
11654 /* Allow the BFD backend to copy any private data it understands
11655 from the output BFD to the import library BFD. This is done last
11656 to permit the routine to look at the filtered symbol table. */
11657 if (! bfd_copy_private_bfd_data (abfd
, implib_bfd
))
11660 if (!bfd_close (implib_bfd
))
11671 elf_final_link_free (bfd
*obfd
, struct elf_final_link_info
*flinfo
)
11675 if (flinfo
->symstrtab
!= NULL
)
11676 _bfd_elf_strtab_free (flinfo
->symstrtab
);
11677 if (flinfo
->contents
!= NULL
)
11678 free (flinfo
->contents
);
11679 if (flinfo
->external_relocs
!= NULL
)
11680 free (flinfo
->external_relocs
);
11681 if (flinfo
->internal_relocs
!= NULL
)
11682 free (flinfo
->internal_relocs
);
11683 if (flinfo
->external_syms
!= NULL
)
11684 free (flinfo
->external_syms
);
11685 if (flinfo
->locsym_shndx
!= NULL
)
11686 free (flinfo
->locsym_shndx
);
11687 if (flinfo
->internal_syms
!= NULL
)
11688 free (flinfo
->internal_syms
);
11689 if (flinfo
->indices
!= NULL
)
11690 free (flinfo
->indices
);
11691 if (flinfo
->sections
!= NULL
)
11692 free (flinfo
->sections
);
11693 if (flinfo
->symshndxbuf
!= NULL
11694 && flinfo
->symshndxbuf
!= (Elf_External_Sym_Shndx
*) -1)
11695 free (flinfo
->symshndxbuf
);
11696 for (o
= obfd
->sections
; o
!= NULL
; o
= o
->next
)
11698 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11699 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
11700 free (esdo
->rel
.hashes
);
11701 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
11702 free (esdo
->rela
.hashes
);
11706 /* Do the final step of an ELF link. */
11709 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
11711 bfd_boolean dynamic
;
11712 bfd_boolean emit_relocs
;
11714 struct elf_final_link_info flinfo
;
11716 struct bfd_link_order
*p
;
11718 bfd_size_type max_contents_size
;
11719 bfd_size_type max_external_reloc_size
;
11720 bfd_size_type max_internal_reloc_count
;
11721 bfd_size_type max_sym_count
;
11722 bfd_size_type max_sym_shndx_count
;
11723 Elf_Internal_Sym elfsym
;
11725 Elf_Internal_Shdr
*symtab_hdr
;
11726 Elf_Internal_Shdr
*symtab_shndx_hdr
;
11727 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11728 struct elf_outext_info eoinfo
;
11729 bfd_boolean merged
;
11730 size_t relativecount
= 0;
11731 asection
*reldyn
= 0;
11733 asection
*attr_section
= NULL
;
11734 bfd_vma attr_size
= 0;
11735 const char *std_attrs_section
;
11736 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
11738 if (!is_elf_hash_table (htab
))
11741 if (bfd_link_pic (info
))
11742 abfd
->flags
|= DYNAMIC
;
11744 dynamic
= htab
->dynamic_sections_created
;
11745 dynobj
= htab
->dynobj
;
11747 emit_relocs
= (bfd_link_relocatable (info
)
11748 || info
->emitrelocations
);
11750 flinfo
.info
= info
;
11751 flinfo
.output_bfd
= abfd
;
11752 flinfo
.symstrtab
= _bfd_elf_strtab_init ();
11753 if (flinfo
.symstrtab
== NULL
)
11758 flinfo
.hash_sec
= NULL
;
11759 flinfo
.symver_sec
= NULL
;
11763 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
11764 /* Note that dynsym_sec can be NULL (on VMS). */
11765 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
11766 /* Note that it is OK if symver_sec is NULL. */
11769 flinfo
.contents
= NULL
;
11770 flinfo
.external_relocs
= NULL
;
11771 flinfo
.internal_relocs
= NULL
;
11772 flinfo
.external_syms
= NULL
;
11773 flinfo
.locsym_shndx
= NULL
;
11774 flinfo
.internal_syms
= NULL
;
11775 flinfo
.indices
= NULL
;
11776 flinfo
.sections
= NULL
;
11777 flinfo
.symshndxbuf
= NULL
;
11778 flinfo
.filesym_count
= 0;
11780 /* The object attributes have been merged. Remove the input
11781 sections from the link, and set the contents of the output
11783 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
11784 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11786 bfd_boolean remove_section
= FALSE
;
11788 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
11789 || strcmp (o
->name
, ".gnu.attributes") == 0)
11791 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11793 asection
*input_section
;
11795 if (p
->type
!= bfd_indirect_link_order
)
11797 input_section
= p
->u
.indirect
.section
;
11798 /* Hack: reset the SEC_HAS_CONTENTS flag so that
11799 elf_link_input_bfd ignores this section. */
11800 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
11803 attr_size
= bfd_elf_obj_attr_size (abfd
);
11804 bfd_set_section_size (abfd
, o
, attr_size
);
11805 /* Skip this section later on. */
11806 o
->map_head
.link_order
= NULL
;
11810 remove_section
= TRUE
;
11812 else if ((o
->flags
& SEC_GROUP
) != 0 && o
->size
== 0)
11814 /* Remove empty group section from linker output. */
11815 remove_section
= TRUE
;
11817 if (remove_section
)
11819 o
->flags
|= SEC_EXCLUDE
;
11820 bfd_section_list_remove (abfd
, o
);
11821 abfd
->section_count
--;
11825 /* Count up the number of relocations we will output for each output
11826 section, so that we know the sizes of the reloc sections. We
11827 also figure out some maximum sizes. */
11828 max_contents_size
= 0;
11829 max_external_reloc_size
= 0;
11830 max_internal_reloc_count
= 0;
11832 max_sym_shndx_count
= 0;
11834 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11836 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11837 o
->reloc_count
= 0;
11839 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11841 unsigned int reloc_count
= 0;
11842 unsigned int additional_reloc_count
= 0;
11843 struct bfd_elf_section_data
*esdi
= NULL
;
11845 if (p
->type
== bfd_section_reloc_link_order
11846 || p
->type
== bfd_symbol_reloc_link_order
)
11848 else if (p
->type
== bfd_indirect_link_order
)
11852 sec
= p
->u
.indirect
.section
;
11854 /* Mark all sections which are to be included in the
11855 link. This will normally be every section. We need
11856 to do this so that we can identify any sections which
11857 the linker has decided to not include. */
11858 sec
->linker_mark
= TRUE
;
11860 if (sec
->flags
& SEC_MERGE
)
11863 if (sec
->rawsize
> max_contents_size
)
11864 max_contents_size
= sec
->rawsize
;
11865 if (sec
->size
> max_contents_size
)
11866 max_contents_size
= sec
->size
;
11868 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
11869 && (sec
->owner
->flags
& DYNAMIC
) == 0)
11873 /* We are interested in just local symbols, not all
11875 if (elf_bad_symtab (sec
->owner
))
11876 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
11877 / bed
->s
->sizeof_sym
);
11879 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
11881 if (sym_count
> max_sym_count
)
11882 max_sym_count
= sym_count
;
11884 if (sym_count
> max_sym_shndx_count
11885 && elf_symtab_shndx_list (sec
->owner
) != NULL
)
11886 max_sym_shndx_count
= sym_count
;
11888 if (esdo
->this_hdr
.sh_type
== SHT_REL
11889 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
11890 /* Some backends use reloc_count in relocation sections
11891 to count particular types of relocs. Of course,
11892 reloc sections themselves can't have relocations. */
11894 else if (emit_relocs
)
11896 reloc_count
= sec
->reloc_count
;
11897 if (bed
->elf_backend_count_additional_relocs
)
11900 c
= (*bed
->elf_backend_count_additional_relocs
) (sec
);
11901 additional_reloc_count
+= c
;
11904 else if (bed
->elf_backend_count_relocs
)
11905 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
11907 esdi
= elf_section_data (sec
);
11909 if ((sec
->flags
& SEC_RELOC
) != 0)
11911 size_t ext_size
= 0;
11913 if (esdi
->rel
.hdr
!= NULL
)
11914 ext_size
= esdi
->rel
.hdr
->sh_size
;
11915 if (esdi
->rela
.hdr
!= NULL
)
11916 ext_size
+= esdi
->rela
.hdr
->sh_size
;
11918 if (ext_size
> max_external_reloc_size
)
11919 max_external_reloc_size
= ext_size
;
11920 if (sec
->reloc_count
> max_internal_reloc_count
)
11921 max_internal_reloc_count
= sec
->reloc_count
;
11926 if (reloc_count
== 0)
11929 reloc_count
+= additional_reloc_count
;
11930 o
->reloc_count
+= reloc_count
;
11932 if (p
->type
== bfd_indirect_link_order
&& emit_relocs
)
11936 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
11937 esdo
->rel
.count
+= additional_reloc_count
;
11939 if (esdi
->rela
.hdr
)
11941 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
11942 esdo
->rela
.count
+= additional_reloc_count
;
11948 esdo
->rela
.count
+= reloc_count
;
11950 esdo
->rel
.count
+= reloc_count
;
11954 if (o
->reloc_count
> 0)
11955 o
->flags
|= SEC_RELOC
;
11958 /* Explicitly clear the SEC_RELOC flag. The linker tends to
11959 set it (this is probably a bug) and if it is set
11960 assign_section_numbers will create a reloc section. */
11961 o
->flags
&=~ SEC_RELOC
;
11964 /* If the SEC_ALLOC flag is not set, force the section VMA to
11965 zero. This is done in elf_fake_sections as well, but forcing
11966 the VMA to 0 here will ensure that relocs against these
11967 sections are handled correctly. */
11968 if ((o
->flags
& SEC_ALLOC
) == 0
11969 && ! o
->user_set_vma
)
11973 if (! bfd_link_relocatable (info
) && merged
)
11974 elf_link_hash_traverse (htab
, _bfd_elf_link_sec_merge_syms
, abfd
);
11976 /* Figure out the file positions for everything but the symbol table
11977 and the relocs. We set symcount to force assign_section_numbers
11978 to create a symbol table. */
11979 bfd_get_symcount (abfd
) = info
->strip
!= strip_all
|| emit_relocs
;
11980 BFD_ASSERT (! abfd
->output_has_begun
);
11981 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
11984 /* Set sizes, and assign file positions for reloc sections. */
11985 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11987 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11988 if ((o
->flags
& SEC_RELOC
) != 0)
11991 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
11995 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
11999 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
12000 to count upwards while actually outputting the relocations. */
12001 esdo
->rel
.count
= 0;
12002 esdo
->rela
.count
= 0;
12004 if (esdo
->this_hdr
.sh_offset
== (file_ptr
) -1)
12006 /* Cache the section contents so that they can be compressed
12007 later. Use bfd_malloc since it will be freed by
12008 bfd_compress_section_contents. */
12009 unsigned char *contents
= esdo
->this_hdr
.contents
;
12010 if ((o
->flags
& SEC_ELF_COMPRESS
) == 0 || contents
!= NULL
)
12013 = (unsigned char *) bfd_malloc (esdo
->this_hdr
.sh_size
);
12014 if (contents
== NULL
)
12016 esdo
->this_hdr
.contents
= contents
;
12020 /* We have now assigned file positions for all the sections except
12021 .symtab, .strtab, and non-loaded reloc sections. We start the
12022 .symtab section at the current file position, and write directly
12023 to it. We build the .strtab section in memory. */
12024 bfd_get_symcount (abfd
) = 0;
12025 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12026 /* sh_name is set in prep_headers. */
12027 symtab_hdr
->sh_type
= SHT_SYMTAB
;
12028 /* sh_flags, sh_addr and sh_size all start off zero. */
12029 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
12030 /* sh_link is set in assign_section_numbers. */
12031 /* sh_info is set below. */
12032 /* sh_offset is set just below. */
12033 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
12035 if (max_sym_count
< 20)
12036 max_sym_count
= 20;
12037 htab
->strtabsize
= max_sym_count
;
12038 amt
= max_sym_count
* sizeof (struct elf_sym_strtab
);
12039 htab
->strtab
= (struct elf_sym_strtab
*) bfd_malloc (amt
);
12040 if (htab
->strtab
== NULL
)
12042 /* The real buffer will be allocated in elf_link_swap_symbols_out. */
12044 = (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF)
12045 ? (Elf_External_Sym_Shndx
*) -1 : NULL
);
12047 if (info
->strip
!= strip_all
|| emit_relocs
)
12049 file_ptr off
= elf_next_file_pos (abfd
);
12051 _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
12053 /* Note that at this point elf_next_file_pos (abfd) is
12054 incorrect. We do not yet know the size of the .symtab section.
12055 We correct next_file_pos below, after we do know the size. */
12057 /* Start writing out the symbol table. The first symbol is always a
12059 elfsym
.st_value
= 0;
12060 elfsym
.st_size
= 0;
12061 elfsym
.st_info
= 0;
12062 elfsym
.st_other
= 0;
12063 elfsym
.st_shndx
= SHN_UNDEF
;
12064 elfsym
.st_target_internal
= 0;
12065 if (elf_link_output_symstrtab (&flinfo
, NULL
, &elfsym
,
12066 bfd_und_section_ptr
, NULL
) != 1)
12069 /* Output a symbol for each section. We output these even if we are
12070 discarding local symbols, since they are used for relocs. These
12071 symbols have no names. We store the index of each one in the
12072 index field of the section, so that we can find it again when
12073 outputting relocs. */
12075 elfsym
.st_size
= 0;
12076 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
12077 elfsym
.st_other
= 0;
12078 elfsym
.st_value
= 0;
12079 elfsym
.st_target_internal
= 0;
12080 for (i
= 1; i
< elf_numsections (abfd
); i
++)
12082 o
= bfd_section_from_elf_index (abfd
, i
);
12085 o
->target_index
= bfd_get_symcount (abfd
);
12086 elfsym
.st_shndx
= i
;
12087 if (!bfd_link_relocatable (info
))
12088 elfsym
.st_value
= o
->vma
;
12089 if (elf_link_output_symstrtab (&flinfo
, NULL
, &elfsym
, o
,
12096 /* Allocate some memory to hold information read in from the input
12098 if (max_contents_size
!= 0)
12100 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
12101 if (flinfo
.contents
== NULL
)
12105 if (max_external_reloc_size
!= 0)
12107 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
12108 if (flinfo
.external_relocs
== NULL
)
12112 if (max_internal_reloc_count
!= 0)
12114 amt
= max_internal_reloc_count
* sizeof (Elf_Internal_Rela
);
12115 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
12116 if (flinfo
.internal_relocs
== NULL
)
12120 if (max_sym_count
!= 0)
12122 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
12123 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
12124 if (flinfo
.external_syms
== NULL
)
12127 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
12128 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
12129 if (flinfo
.internal_syms
== NULL
)
12132 amt
= max_sym_count
* sizeof (long);
12133 flinfo
.indices
= (long int *) bfd_malloc (amt
);
12134 if (flinfo
.indices
== NULL
)
12137 amt
= max_sym_count
* sizeof (asection
*);
12138 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
12139 if (flinfo
.sections
== NULL
)
12143 if (max_sym_shndx_count
!= 0)
12145 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
12146 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
12147 if (flinfo
.locsym_shndx
== NULL
)
12153 bfd_vma base
, end
= 0;
12156 for (sec
= htab
->tls_sec
;
12157 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
12160 bfd_size_type size
= sec
->size
;
12163 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
12165 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
12168 size
= ord
->offset
+ ord
->size
;
12170 end
= sec
->vma
+ size
;
12172 base
= htab
->tls_sec
->vma
;
12173 /* Only align end of TLS section if static TLS doesn't have special
12174 alignment requirements. */
12175 if (bed
->static_tls_alignment
== 1)
12176 end
= align_power (end
, htab
->tls_sec
->alignment_power
);
12177 htab
->tls_size
= end
- base
;
12180 /* Reorder SHF_LINK_ORDER sections. */
12181 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12183 if (!elf_fixup_link_order (abfd
, o
))
12187 if (!_bfd_elf_fixup_eh_frame_hdr (info
))
12190 /* Since ELF permits relocations to be against local symbols, we
12191 must have the local symbols available when we do the relocations.
12192 Since we would rather only read the local symbols once, and we
12193 would rather not keep them in memory, we handle all the
12194 relocations for a single input file at the same time.
12196 Unfortunately, there is no way to know the total number of local
12197 symbols until we have seen all of them, and the local symbol
12198 indices precede the global symbol indices. This means that when
12199 we are generating relocatable output, and we see a reloc against
12200 a global symbol, we can not know the symbol index until we have
12201 finished examining all the local symbols to see which ones we are
12202 going to output. To deal with this, we keep the relocations in
12203 memory, and don't output them until the end of the link. This is
12204 an unfortunate waste of memory, but I don't see a good way around
12205 it. Fortunately, it only happens when performing a relocatable
12206 link, which is not the common case. FIXME: If keep_memory is set
12207 we could write the relocs out and then read them again; I don't
12208 know how bad the memory loss will be. */
12210 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
12211 sub
->output_has_begun
= FALSE
;
12212 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12214 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
12216 if (p
->type
== bfd_indirect_link_order
12217 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
12218 == bfd_target_elf_flavour
)
12219 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
12221 if (! sub
->output_has_begun
)
12223 if (! elf_link_input_bfd (&flinfo
, sub
))
12225 sub
->output_has_begun
= TRUE
;
12228 else if (p
->type
== bfd_section_reloc_link_order
12229 || p
->type
== bfd_symbol_reloc_link_order
)
12231 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
12236 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
12238 if (p
->type
== bfd_indirect_link_order
12239 && (bfd_get_flavour (sub
)
12240 == bfd_target_elf_flavour
)
12241 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
12242 != bed
->s
->elfclass
))
12244 const char *iclass
, *oclass
;
12246 switch (bed
->s
->elfclass
)
12248 case ELFCLASS64
: oclass
= "ELFCLASS64"; break;
12249 case ELFCLASS32
: oclass
= "ELFCLASS32"; break;
12250 case ELFCLASSNONE
: oclass
= "ELFCLASSNONE"; break;
12254 switch (elf_elfheader (sub
)->e_ident
[EI_CLASS
])
12256 case ELFCLASS64
: iclass
= "ELFCLASS64"; break;
12257 case ELFCLASS32
: iclass
= "ELFCLASS32"; break;
12258 case ELFCLASSNONE
: iclass
= "ELFCLASSNONE"; break;
12262 bfd_set_error (bfd_error_wrong_format
);
12264 /* xgettext:c-format */
12265 (_("%pB: file class %s incompatible with %s"),
12266 sub
, iclass
, oclass
);
12275 /* Free symbol buffer if needed. */
12276 if (!info
->reduce_memory_overheads
)
12278 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
12279 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
12280 && elf_tdata (sub
)->symbuf
)
12282 free (elf_tdata (sub
)->symbuf
);
12283 elf_tdata (sub
)->symbuf
= NULL
;
12287 /* Output any global symbols that got converted to local in a
12288 version script or due to symbol visibility. We do this in a
12289 separate step since ELF requires all local symbols to appear
12290 prior to any global symbols. FIXME: We should only do this if
12291 some global symbols were, in fact, converted to become local.
12292 FIXME: Will this work correctly with the Irix 5 linker? */
12293 eoinfo
.failed
= FALSE
;
12294 eoinfo
.flinfo
= &flinfo
;
12295 eoinfo
.localsyms
= TRUE
;
12296 eoinfo
.file_sym_done
= FALSE
;
12297 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
12301 /* If backend needs to output some local symbols not present in the hash
12302 table, do it now. */
12303 if (bed
->elf_backend_output_arch_local_syms
12304 && (info
->strip
!= strip_all
|| emit_relocs
))
12306 typedef int (*out_sym_func
)
12307 (void *, const char *, Elf_Internal_Sym
*, asection
*,
12308 struct elf_link_hash_entry
*);
12310 if (! ((*bed
->elf_backend_output_arch_local_syms
)
12311 (abfd
, info
, &flinfo
,
12312 (out_sym_func
) elf_link_output_symstrtab
)))
12316 /* That wrote out all the local symbols. Finish up the symbol table
12317 with the global symbols. Even if we want to strip everything we
12318 can, we still need to deal with those global symbols that got
12319 converted to local in a version script. */
12321 /* The sh_info field records the index of the first non local symbol. */
12322 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
12325 && htab
->dynsym
!= NULL
12326 && htab
->dynsym
->output_section
!= bfd_abs_section_ptr
)
12328 Elf_Internal_Sym sym
;
12329 bfd_byte
*dynsym
= htab
->dynsym
->contents
;
12331 o
= htab
->dynsym
->output_section
;
12332 elf_section_data (o
)->this_hdr
.sh_info
= htab
->local_dynsymcount
+ 1;
12334 /* Write out the section symbols for the output sections. */
12335 if (bfd_link_pic (info
)
12336 || htab
->is_relocatable_executable
)
12342 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
12344 sym
.st_target_internal
= 0;
12346 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
12352 dynindx
= elf_section_data (s
)->dynindx
;
12355 indx
= elf_section_data (s
)->this_idx
;
12356 BFD_ASSERT (indx
> 0);
12357 sym
.st_shndx
= indx
;
12358 if (! check_dynsym (abfd
, &sym
))
12360 sym
.st_value
= s
->vma
;
12361 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
12362 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
12366 /* Write out the local dynsyms. */
12367 if (htab
->dynlocal
)
12369 struct elf_link_local_dynamic_entry
*e
;
12370 for (e
= htab
->dynlocal
; e
; e
= e
->next
)
12375 /* Copy the internal symbol and turn off visibility.
12376 Note that we saved a word of storage and overwrote
12377 the original st_name with the dynstr_index. */
12379 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
12381 s
= bfd_section_from_elf_index (e
->input_bfd
,
12386 elf_section_data (s
->output_section
)->this_idx
;
12387 if (! check_dynsym (abfd
, &sym
))
12389 sym
.st_value
= (s
->output_section
->vma
12391 + e
->isym
.st_value
);
12394 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
12395 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
12400 /* We get the global symbols from the hash table. */
12401 eoinfo
.failed
= FALSE
;
12402 eoinfo
.localsyms
= FALSE
;
12403 eoinfo
.flinfo
= &flinfo
;
12404 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
12408 /* If backend needs to output some symbols not present in the hash
12409 table, do it now. */
12410 if (bed
->elf_backend_output_arch_syms
12411 && (info
->strip
!= strip_all
|| emit_relocs
))
12413 typedef int (*out_sym_func
)
12414 (void *, const char *, Elf_Internal_Sym
*, asection
*,
12415 struct elf_link_hash_entry
*);
12417 if (! ((*bed
->elf_backend_output_arch_syms
)
12418 (abfd
, info
, &flinfo
,
12419 (out_sym_func
) elf_link_output_symstrtab
)))
12423 /* Finalize the .strtab section. */
12424 _bfd_elf_strtab_finalize (flinfo
.symstrtab
);
12426 /* Swap out the .strtab section. */
12427 if (!elf_link_swap_symbols_out (&flinfo
))
12430 /* Now we know the size of the symtab section. */
12431 if (bfd_get_symcount (abfd
) > 0)
12433 /* Finish up and write out the symbol string table (.strtab)
12435 Elf_Internal_Shdr
*symstrtab_hdr
= NULL
;
12436 file_ptr off
= symtab_hdr
->sh_offset
+ symtab_hdr
->sh_size
;
12438 if (elf_symtab_shndx_list (abfd
))
12440 symtab_shndx_hdr
= & elf_symtab_shndx_list (abfd
)->hdr
;
12442 if (symtab_shndx_hdr
!= NULL
&& symtab_shndx_hdr
->sh_name
!= 0)
12444 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
12445 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
12446 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
12447 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
12448 symtab_shndx_hdr
->sh_size
= amt
;
12450 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
12453 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
12454 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
12459 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
12460 /* sh_name was set in prep_headers. */
12461 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
12462 symstrtab_hdr
->sh_flags
= bed
->elf_strtab_flags
;
12463 symstrtab_hdr
->sh_addr
= 0;
12464 symstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (flinfo
.symstrtab
);
12465 symstrtab_hdr
->sh_entsize
= 0;
12466 symstrtab_hdr
->sh_link
= 0;
12467 symstrtab_hdr
->sh_info
= 0;
12468 /* sh_offset is set just below. */
12469 symstrtab_hdr
->sh_addralign
= 1;
12471 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
,
12473 elf_next_file_pos (abfd
) = off
;
12475 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
12476 || ! _bfd_elf_strtab_emit (abfd
, flinfo
.symstrtab
))
12480 if (info
->out_implib_bfd
&& !elf_output_implib (abfd
, info
))
12482 _bfd_error_handler (_("%pB: failed to generate import library"),
12483 info
->out_implib_bfd
);
12487 /* Adjust the relocs to have the correct symbol indices. */
12488 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12490 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
12493 if ((o
->flags
& SEC_RELOC
) == 0)
12496 sort
= bed
->sort_relocs_p
== NULL
|| (*bed
->sort_relocs_p
) (o
);
12497 if (esdo
->rel
.hdr
!= NULL
12498 && !elf_link_adjust_relocs (abfd
, o
, &esdo
->rel
, sort
, info
))
12500 if (esdo
->rela
.hdr
!= NULL
12501 && !elf_link_adjust_relocs (abfd
, o
, &esdo
->rela
, sort
, info
))
12504 /* Set the reloc_count field to 0 to prevent write_relocs from
12505 trying to swap the relocs out itself. */
12506 o
->reloc_count
= 0;
12509 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
12510 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
12512 /* If we are linking against a dynamic object, or generating a
12513 shared library, finish up the dynamic linking information. */
12516 bfd_byte
*dyncon
, *dynconend
;
12518 /* Fix up .dynamic entries. */
12519 o
= bfd_get_linker_section (dynobj
, ".dynamic");
12520 BFD_ASSERT (o
!= NULL
);
12522 dyncon
= o
->contents
;
12523 dynconend
= o
->contents
+ o
->size
;
12524 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
12526 Elf_Internal_Dyn dyn
;
12529 bfd_size_type sh_size
;
12532 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
12539 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
12541 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
12543 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
12544 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
12547 dyn
.d_un
.d_val
= relativecount
;
12554 name
= info
->init_function
;
12557 name
= info
->fini_function
;
12560 struct elf_link_hash_entry
*h
;
12562 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
12564 && (h
->root
.type
== bfd_link_hash_defined
12565 || h
->root
.type
== bfd_link_hash_defweak
))
12567 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
12568 o
= h
->root
.u
.def
.section
;
12569 if (o
->output_section
!= NULL
)
12570 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
12571 + o
->output_offset
);
12574 /* The symbol is imported from another shared
12575 library and does not apply to this one. */
12576 dyn
.d_un
.d_ptr
= 0;
12583 case DT_PREINIT_ARRAYSZ
:
12584 name
= ".preinit_array";
12586 case DT_INIT_ARRAYSZ
:
12587 name
= ".init_array";
12589 case DT_FINI_ARRAYSZ
:
12590 name
= ".fini_array";
12592 o
= bfd_get_section_by_name (abfd
, name
);
12596 (_("could not find section %s"), name
);
12601 (_("warning: %s section has zero size"), name
);
12602 dyn
.d_un
.d_val
= o
->size
;
12605 case DT_PREINIT_ARRAY
:
12606 name
= ".preinit_array";
12608 case DT_INIT_ARRAY
:
12609 name
= ".init_array";
12611 case DT_FINI_ARRAY
:
12612 name
= ".fini_array";
12614 o
= bfd_get_section_by_name (abfd
, name
);
12621 name
= ".gnu.hash";
12630 name
= ".gnu.version_d";
12633 name
= ".gnu.version_r";
12636 name
= ".gnu.version";
12638 o
= bfd_get_linker_section (dynobj
, name
);
12640 if (o
== NULL
|| bfd_is_abs_section (o
->output_section
))
12643 (_("could not find section %s"), name
);
12646 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
12649 (_("warning: section '%s' is being made into a note"), name
);
12650 bfd_set_error (bfd_error_nonrepresentable_section
);
12653 dyn
.d_un
.d_ptr
= o
->output_section
->vma
+ o
->output_offset
;
12660 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
12666 for (i
= 1; i
< elf_numsections (abfd
); i
++)
12668 Elf_Internal_Shdr
*hdr
;
12670 hdr
= elf_elfsections (abfd
)[i
];
12671 if (hdr
->sh_type
== type
12672 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
12674 sh_size
+= hdr
->sh_size
;
12676 || sh_addr
> hdr
->sh_addr
)
12677 sh_addr
= hdr
->sh_addr
;
12681 if (bed
->dtrel_excludes_plt
&& htab
->srelplt
!= NULL
)
12683 /* Don't count procedure linkage table relocs in the
12684 overall reloc count. */
12685 sh_size
-= htab
->srelplt
->size
;
12687 /* If the size is zero, make the address zero too.
12688 This is to avoid a glibc bug. If the backend
12689 emits DT_RELA/DT_RELASZ even when DT_RELASZ is
12690 zero, then we'll put DT_RELA at the end of
12691 DT_JMPREL. glibc will interpret the end of
12692 DT_RELA matching the end of DT_JMPREL as the
12693 case where DT_RELA includes DT_JMPREL, and for
12694 LD_BIND_NOW will decide that processing DT_RELA
12695 will process the PLT relocs too. Net result:
12696 No PLT relocs applied. */
12699 /* If .rela.plt is the first .rela section, exclude
12700 it from DT_RELA. */
12701 else if (sh_addr
== (htab
->srelplt
->output_section
->vma
12702 + htab
->srelplt
->output_offset
))
12703 sh_addr
+= htab
->srelplt
->size
;
12706 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
12707 dyn
.d_un
.d_val
= sh_size
;
12709 dyn
.d_un
.d_ptr
= sh_addr
;
12712 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
12716 /* If we have created any dynamic sections, then output them. */
12717 if (dynobj
!= NULL
)
12719 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
12722 /* Check for DT_TEXTREL (late, in case the backend removes it). */
12723 if (((info
->warn_shared_textrel
&& bfd_link_pic (info
))
12724 || info
->error_textrel
)
12725 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
12727 bfd_byte
*dyncon
, *dynconend
;
12729 dyncon
= o
->contents
;
12730 dynconend
= o
->contents
+ o
->size
;
12731 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
12733 Elf_Internal_Dyn dyn
;
12735 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
12737 if (dyn
.d_tag
== DT_TEXTREL
)
12739 if (info
->error_textrel
)
12740 info
->callbacks
->einfo
12741 (_("%P%X: read-only segment has dynamic relocations\n"));
12743 info
->callbacks
->einfo
12744 (_("%P: warning: creating a DT_TEXTREL in a shared object\n"));
12750 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
12752 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
12754 || o
->output_section
== bfd_abs_section_ptr
)
12756 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
12758 /* At this point, we are only interested in sections
12759 created by _bfd_elf_link_create_dynamic_sections. */
12762 if (htab
->stab_info
.stabstr
== o
)
12764 if (htab
->eh_info
.hdr_sec
== o
)
12766 if (strcmp (o
->name
, ".dynstr") != 0)
12768 if (! bfd_set_section_contents (abfd
, o
->output_section
,
12770 (file_ptr
) o
->output_offset
12771 * bfd_octets_per_byte (abfd
),
12777 /* The contents of the .dynstr section are actually in a
12781 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
12782 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
12783 || !_bfd_elf_strtab_emit (abfd
, htab
->dynstr
))
12789 if (!info
->resolve_section_groups
)
12791 bfd_boolean failed
= FALSE
;
12793 BFD_ASSERT (bfd_link_relocatable (info
));
12794 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
12799 /* If we have optimized stabs strings, output them. */
12800 if (htab
->stab_info
.stabstr
!= NULL
)
12802 if (!_bfd_write_stab_strings (abfd
, &htab
->stab_info
))
12806 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
12809 elf_final_link_free (abfd
, &flinfo
);
12811 elf_linker (abfd
) = TRUE
;
12815 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
12816 if (contents
== NULL
)
12817 return FALSE
; /* Bail out and fail. */
12818 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
12819 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
12826 elf_final_link_free (abfd
, &flinfo
);
12830 /* Initialize COOKIE for input bfd ABFD. */
12833 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
12834 struct bfd_link_info
*info
, bfd
*abfd
)
12836 Elf_Internal_Shdr
*symtab_hdr
;
12837 const struct elf_backend_data
*bed
;
12839 bed
= get_elf_backend_data (abfd
);
12840 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12842 cookie
->abfd
= abfd
;
12843 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
12844 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
12845 if (cookie
->bad_symtab
)
12847 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
12848 cookie
->extsymoff
= 0;
12852 cookie
->locsymcount
= symtab_hdr
->sh_info
;
12853 cookie
->extsymoff
= symtab_hdr
->sh_info
;
12856 if (bed
->s
->arch_size
== 32)
12857 cookie
->r_sym_shift
= 8;
12859 cookie
->r_sym_shift
= 32;
12861 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
12862 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
12864 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
12865 cookie
->locsymcount
, 0,
12867 if (cookie
->locsyms
== NULL
)
12869 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
12872 if (info
->keep_memory
)
12873 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
12878 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
12881 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
12883 Elf_Internal_Shdr
*symtab_hdr
;
12885 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12886 if (cookie
->locsyms
!= NULL
12887 && symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
12888 free (cookie
->locsyms
);
12891 /* Initialize the relocation information in COOKIE for input section SEC
12892 of input bfd ABFD. */
12895 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
12896 struct bfd_link_info
*info
, bfd
*abfd
,
12899 if (sec
->reloc_count
== 0)
12901 cookie
->rels
= NULL
;
12902 cookie
->relend
= NULL
;
12906 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
12907 info
->keep_memory
);
12908 if (cookie
->rels
== NULL
)
12910 cookie
->rel
= cookie
->rels
;
12911 cookie
->relend
= cookie
->rels
+ sec
->reloc_count
;
12913 cookie
->rel
= cookie
->rels
;
12917 /* Free the memory allocated by init_reloc_cookie_rels,
12921 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
12924 if (cookie
->rels
&& elf_section_data (sec
)->relocs
!= cookie
->rels
)
12925 free (cookie
->rels
);
12928 /* Initialize the whole of COOKIE for input section SEC. */
12931 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
12932 struct bfd_link_info
*info
,
12935 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
12937 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
12942 fini_reloc_cookie (cookie
, sec
->owner
);
12947 /* Free the memory allocated by init_reloc_cookie_for_section,
12951 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
12954 fini_reloc_cookie_rels (cookie
, sec
);
12955 fini_reloc_cookie (cookie
, sec
->owner
);
12958 /* Garbage collect unused sections. */
12960 /* Default gc_mark_hook. */
12963 _bfd_elf_gc_mark_hook (asection
*sec
,
12964 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12965 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
12966 struct elf_link_hash_entry
*h
,
12967 Elf_Internal_Sym
*sym
)
12971 switch (h
->root
.type
)
12973 case bfd_link_hash_defined
:
12974 case bfd_link_hash_defweak
:
12975 return h
->root
.u
.def
.section
;
12977 case bfd_link_hash_common
:
12978 return h
->root
.u
.c
.p
->section
;
12985 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
12990 /* Return the debug definition section. */
12993 elf_gc_mark_debug_section (asection
*sec ATTRIBUTE_UNUSED
,
12994 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12995 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
12996 struct elf_link_hash_entry
*h
,
12997 Elf_Internal_Sym
*sym
)
13001 /* Return the global debug definition section. */
13002 if ((h
->root
.type
== bfd_link_hash_defined
13003 || h
->root
.type
== bfd_link_hash_defweak
)
13004 && (h
->root
.u
.def
.section
->flags
& SEC_DEBUGGING
) != 0)
13005 return h
->root
.u
.def
.section
;
13009 /* Return the local debug definition section. */
13010 asection
*isec
= bfd_section_from_elf_index (sec
->owner
,
13012 if ((isec
->flags
& SEC_DEBUGGING
) != 0)
13019 /* COOKIE->rel describes a relocation against section SEC, which is
13020 a section we've decided to keep. Return the section that contains
13021 the relocation symbol, or NULL if no section contains it. */
13024 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
13025 elf_gc_mark_hook_fn gc_mark_hook
,
13026 struct elf_reloc_cookie
*cookie
,
13027 bfd_boolean
*start_stop
)
13029 unsigned long r_symndx
;
13030 struct elf_link_hash_entry
*h
;
13032 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
13033 if (r_symndx
== STN_UNDEF
)
13036 if (r_symndx
>= cookie
->locsymcount
13037 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
13039 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
13042 info
->callbacks
->einfo (_("%F%P: corrupt input: %pB\n"),
13046 while (h
->root
.type
== bfd_link_hash_indirect
13047 || h
->root
.type
== bfd_link_hash_warning
)
13048 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
13050 /* If this symbol is weak and there is a non-weak definition, we
13051 keep the non-weak definition because many backends put
13052 dynamic reloc info on the non-weak definition for code
13053 handling copy relocs. */
13054 if (h
->is_weakalias
)
13055 weakdef (h
)->mark
= 1;
13057 if (start_stop
!= NULL
)
13059 /* To work around a glibc bug, mark XXX input sections
13060 when there is a reference to __start_XXX or __stop_XXX
13064 asection
*s
= h
->u2
.start_stop_section
;
13065 *start_stop
= !s
->gc_mark
;
13070 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
13073 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
13074 &cookie
->locsyms
[r_symndx
]);
13077 /* COOKIE->rel describes a relocation against section SEC, which is
13078 a section we've decided to keep. Mark the section that contains
13079 the relocation symbol. */
13082 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
13084 elf_gc_mark_hook_fn gc_mark_hook
,
13085 struct elf_reloc_cookie
*cookie
)
13088 bfd_boolean start_stop
= FALSE
;
13090 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
, &start_stop
);
13091 while (rsec
!= NULL
)
13093 if (!rsec
->gc_mark
)
13095 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
13096 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
13098 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
13103 rsec
= bfd_get_next_section_by_name (rsec
->owner
, rsec
);
13108 /* The mark phase of garbage collection. For a given section, mark
13109 it and any sections in this section's group, and all the sections
13110 which define symbols to which it refers. */
13113 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
13115 elf_gc_mark_hook_fn gc_mark_hook
)
13118 asection
*group_sec
, *eh_frame
;
13122 /* Mark all the sections in the group. */
13123 group_sec
= elf_section_data (sec
)->next_in_group
;
13124 if (group_sec
&& !group_sec
->gc_mark
)
13125 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
13128 /* Look through the section relocs. */
13130 eh_frame
= elf_eh_frame_section (sec
->owner
);
13131 if ((sec
->flags
& SEC_RELOC
) != 0
13132 && sec
->reloc_count
> 0
13133 && sec
!= eh_frame
)
13135 struct elf_reloc_cookie cookie
;
13137 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
13141 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
13142 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
13147 fini_reloc_cookie_for_section (&cookie
, sec
);
13151 if (ret
&& eh_frame
&& elf_fde_list (sec
))
13153 struct elf_reloc_cookie cookie
;
13155 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
13159 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
13160 gc_mark_hook
, &cookie
))
13162 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
13166 eh_frame
= elf_section_eh_frame_entry (sec
);
13167 if (ret
&& eh_frame
&& !eh_frame
->gc_mark
)
13168 if (!_bfd_elf_gc_mark (info
, eh_frame
, gc_mark_hook
))
13174 /* Scan and mark sections in a special or debug section group. */
13177 _bfd_elf_gc_mark_debug_special_section_group (asection
*grp
)
13179 /* Point to first section of section group. */
13181 /* Used to iterate the section group. */
13184 bfd_boolean is_special_grp
= TRUE
;
13185 bfd_boolean is_debug_grp
= TRUE
;
13187 /* First scan to see if group contains any section other than debug
13188 and special section. */
13189 ssec
= msec
= elf_next_in_group (grp
);
13192 if ((msec
->flags
& SEC_DEBUGGING
) == 0)
13193 is_debug_grp
= FALSE
;
13195 if ((msec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) != 0)
13196 is_special_grp
= FALSE
;
13198 msec
= elf_next_in_group (msec
);
13200 while (msec
!= ssec
);
13202 /* If this is a pure debug section group or pure special section group,
13203 keep all sections in this group. */
13204 if (is_debug_grp
|| is_special_grp
)
13209 msec
= elf_next_in_group (msec
);
13211 while (msec
!= ssec
);
13215 /* Keep debug and special sections. */
13218 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
13219 elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED
)
13223 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
13226 bfd_boolean some_kept
;
13227 bfd_boolean debug_frag_seen
;
13228 bfd_boolean has_kept_debug_info
;
13230 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
13232 isec
= ibfd
->sections
;
13233 if (isec
== NULL
|| isec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13236 /* Ensure all linker created sections are kept,
13237 see if any other section is already marked,
13238 and note if we have any fragmented debug sections. */
13239 debug_frag_seen
= some_kept
= has_kept_debug_info
= FALSE
;
13240 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13242 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
13244 else if (isec
->gc_mark
13245 && (isec
->flags
& SEC_ALLOC
) != 0
13246 && elf_section_type (isec
) != SHT_NOTE
)
13249 if (!debug_frag_seen
13250 && (isec
->flags
& SEC_DEBUGGING
)
13251 && CONST_STRNEQ (isec
->name
, ".debug_line."))
13252 debug_frag_seen
= TRUE
;
13255 /* If no non-note alloc section in this file will be kept, then
13256 we can toss out the debug and special sections. */
13260 /* Keep debug and special sections like .comment when they are
13261 not part of a group. Also keep section groups that contain
13262 just debug sections or special sections. */
13263 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13265 if ((isec
->flags
& SEC_GROUP
) != 0)
13266 _bfd_elf_gc_mark_debug_special_section_group (isec
);
13267 else if (((isec
->flags
& SEC_DEBUGGING
) != 0
13268 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0)
13269 && elf_next_in_group (isec
) == NULL
)
13271 if (isec
->gc_mark
&& (isec
->flags
& SEC_DEBUGGING
) != 0)
13272 has_kept_debug_info
= TRUE
;
13275 /* Look for CODE sections which are going to be discarded,
13276 and find and discard any fragmented debug sections which
13277 are associated with that code section. */
13278 if (debug_frag_seen
)
13279 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13280 if ((isec
->flags
& SEC_CODE
) != 0
13281 && isec
->gc_mark
== 0)
13286 ilen
= strlen (isec
->name
);
13288 /* Association is determined by the name of the debug
13289 section containing the name of the code section as
13290 a suffix. For example .debug_line.text.foo is a
13291 debug section associated with .text.foo. */
13292 for (dsec
= ibfd
->sections
; dsec
!= NULL
; dsec
= dsec
->next
)
13296 if (dsec
->gc_mark
== 0
13297 || (dsec
->flags
& SEC_DEBUGGING
) == 0)
13300 dlen
= strlen (dsec
->name
);
13303 && strncmp (dsec
->name
+ (dlen
- ilen
),
13304 isec
->name
, ilen
) == 0)
13309 /* Mark debug sections referenced by kept debug sections. */
13310 if (has_kept_debug_info
)
13311 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13313 && (isec
->flags
& SEC_DEBUGGING
) != 0)
13314 if (!_bfd_elf_gc_mark (info
, isec
,
13315 elf_gc_mark_debug_section
))
13322 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
13325 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13327 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
13331 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
13332 || elf_object_id (sub
) != elf_hash_table_id (elf_hash_table (info
))
13333 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
13336 if (o
== NULL
|| o
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13339 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
13341 /* When any section in a section group is kept, we keep all
13342 sections in the section group. If the first member of
13343 the section group is excluded, we will also exclude the
13345 if (o
->flags
& SEC_GROUP
)
13347 asection
*first
= elf_next_in_group (o
);
13348 o
->gc_mark
= first
->gc_mark
;
13354 /* Skip sweeping sections already excluded. */
13355 if (o
->flags
& SEC_EXCLUDE
)
13358 /* Since this is early in the link process, it is simple
13359 to remove a section from the output. */
13360 o
->flags
|= SEC_EXCLUDE
;
13362 if (info
->print_gc_sections
&& o
->size
!= 0)
13363 /* xgettext:c-format */
13364 _bfd_error_handler (_("removing unused section '%pA' in file '%pB'"),
13372 /* Propagate collected vtable information. This is called through
13373 elf_link_hash_traverse. */
13376 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
13378 /* Those that are not vtables. */
13380 || h
->u2
.vtable
== NULL
13381 || h
->u2
.vtable
->parent
== NULL
)
13384 /* Those vtables that do not have parents, we cannot merge. */
13385 if (h
->u2
.vtable
->parent
== (struct elf_link_hash_entry
*) -1)
13388 /* If we've already been done, exit. */
13389 if (h
->u2
.vtable
->used
&& h
->u2
.vtable
->used
[-1])
13392 /* Make sure the parent's table is up to date. */
13393 elf_gc_propagate_vtable_entries_used (h
->u2
.vtable
->parent
, okp
);
13395 if (h
->u2
.vtable
->used
== NULL
)
13397 /* None of this table's entries were referenced. Re-use the
13399 h
->u2
.vtable
->used
= h
->u2
.vtable
->parent
->u2
.vtable
->used
;
13400 h
->u2
.vtable
->size
= h
->u2
.vtable
->parent
->u2
.vtable
->size
;
13405 bfd_boolean
*cu
, *pu
;
13407 /* Or the parent's entries into ours. */
13408 cu
= h
->u2
.vtable
->used
;
13410 pu
= h
->u2
.vtable
->parent
->u2
.vtable
->used
;
13413 const struct elf_backend_data
*bed
;
13414 unsigned int log_file_align
;
13416 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
13417 log_file_align
= bed
->s
->log_file_align
;
13418 n
= h
->u2
.vtable
->parent
->u2
.vtable
->size
>> log_file_align
;
13433 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
13436 bfd_vma hstart
, hend
;
13437 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
13438 const struct elf_backend_data
*bed
;
13439 unsigned int log_file_align
;
13441 /* Take care of both those symbols that do not describe vtables as
13442 well as those that are not loaded. */
13444 || h
->u2
.vtable
== NULL
13445 || h
->u2
.vtable
->parent
== NULL
)
13448 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
13449 || h
->root
.type
== bfd_link_hash_defweak
);
13451 sec
= h
->root
.u
.def
.section
;
13452 hstart
= h
->root
.u
.def
.value
;
13453 hend
= hstart
+ h
->size
;
13455 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
13457 return *(bfd_boolean
*) okp
= FALSE
;
13458 bed
= get_elf_backend_data (sec
->owner
);
13459 log_file_align
= bed
->s
->log_file_align
;
13461 relend
= relstart
+ sec
->reloc_count
;
13463 for (rel
= relstart
; rel
< relend
; ++rel
)
13464 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
13466 /* If the entry is in use, do nothing. */
13467 if (h
->u2
.vtable
->used
13468 && (rel
->r_offset
- hstart
) < h
->u2
.vtable
->size
)
13470 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
13471 if (h
->u2
.vtable
->used
[entry
])
13474 /* Otherwise, kill it. */
13475 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
13481 /* Mark sections containing dynamically referenced symbols. When
13482 building shared libraries, we must assume that any visible symbol is
13486 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
13488 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
13489 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
13491 if ((h
->root
.type
== bfd_link_hash_defined
13492 || h
->root
.type
== bfd_link_hash_defweak
)
13493 && ((h
->ref_dynamic
&& !h
->forced_local
)
13494 || ((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
13495 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
13496 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
13497 && (!bfd_link_executable (info
)
13498 || info
->gc_keep_exported
13499 || info
->export_dynamic
13502 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
13503 && (h
->versioned
>= versioned
13504 || !bfd_hide_sym_by_version (info
->version_info
,
13505 h
->root
.root
.string
)))))
13506 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
13511 /* Keep all sections containing symbols undefined on the command-line,
13512 and the section containing the entry symbol. */
13515 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
13517 struct bfd_sym_chain
*sym
;
13519 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
13521 struct elf_link_hash_entry
*h
;
13523 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
13524 FALSE
, FALSE
, FALSE
);
13527 && (h
->root
.type
== bfd_link_hash_defined
13528 || h
->root
.type
== bfd_link_hash_defweak
)
13529 && !bfd_is_abs_section (h
->root
.u
.def
.section
)
13530 && !bfd_is_und_section (h
->root
.u
.def
.section
))
13531 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
13536 bfd_elf_parse_eh_frame_entries (bfd
*abfd ATTRIBUTE_UNUSED
,
13537 struct bfd_link_info
*info
)
13539 bfd
*ibfd
= info
->input_bfds
;
13541 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
13544 struct elf_reloc_cookie cookie
;
13546 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
13548 sec
= ibfd
->sections
;
13549 if (sec
== NULL
|| sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13552 if (!init_reloc_cookie (&cookie
, info
, ibfd
))
13555 for (sec
= ibfd
->sections
; sec
; sec
= sec
->next
)
13557 if (CONST_STRNEQ (bfd_section_name (ibfd
, sec
), ".eh_frame_entry")
13558 && init_reloc_cookie_rels (&cookie
, info
, ibfd
, sec
))
13560 _bfd_elf_parse_eh_frame_entry (info
, sec
, &cookie
);
13561 fini_reloc_cookie_rels (&cookie
, sec
);
13568 /* Do mark and sweep of unused sections. */
13571 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
13573 bfd_boolean ok
= TRUE
;
13575 elf_gc_mark_hook_fn gc_mark_hook
;
13576 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13577 struct elf_link_hash_table
*htab
;
13579 if (!bed
->can_gc_sections
13580 || !is_elf_hash_table (info
->hash
))
13582 _bfd_error_handler(_("warning: gc-sections option ignored"));
13586 bed
->gc_keep (info
);
13587 htab
= elf_hash_table (info
);
13589 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
13590 at the .eh_frame section if we can mark the FDEs individually. */
13591 for (sub
= info
->input_bfds
;
13592 info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
&& sub
!= NULL
;
13593 sub
= sub
->link
.next
)
13596 struct elf_reloc_cookie cookie
;
13598 sec
= sub
->sections
;
13599 if (sec
== NULL
|| sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13601 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
13602 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
13604 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
13605 if (elf_section_data (sec
)->sec_info
13606 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
13607 elf_eh_frame_section (sub
) = sec
;
13608 fini_reloc_cookie_for_section (&cookie
, sec
);
13609 sec
= bfd_get_next_section_by_name (NULL
, sec
);
13613 /* Apply transitive closure to the vtable entry usage info. */
13614 elf_link_hash_traverse (htab
, elf_gc_propagate_vtable_entries_used
, &ok
);
13618 /* Kill the vtable relocations that were not used. */
13619 elf_link_hash_traverse (htab
, elf_gc_smash_unused_vtentry_relocs
, &ok
);
13623 /* Mark dynamically referenced symbols. */
13624 if (htab
->dynamic_sections_created
|| info
->gc_keep_exported
)
13625 elf_link_hash_traverse (htab
, bed
->gc_mark_dynamic_ref
, info
);
13627 /* Grovel through relocs to find out who stays ... */
13628 gc_mark_hook
= bed
->gc_mark_hook
;
13629 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
13633 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
13634 || elf_object_id (sub
) != elf_hash_table_id (htab
)
13635 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
13639 if (o
== NULL
|| o
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13642 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
13643 Also treat note sections as a root, if the section is not part
13644 of a group. We must keep all PREINIT_ARRAY, INIT_ARRAY as
13645 well as FINI_ARRAY sections for ld -r. */
13646 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
13648 && (o
->flags
& SEC_EXCLUDE
) == 0
13649 && ((o
->flags
& SEC_KEEP
) != 0
13650 || (bfd_link_relocatable (info
)
13651 && ((elf_section_data (o
)->this_hdr
.sh_type
13652 == SHT_PREINIT_ARRAY
)
13653 || (elf_section_data (o
)->this_hdr
.sh_type
13655 || (elf_section_data (o
)->this_hdr
.sh_type
13656 == SHT_FINI_ARRAY
)))
13657 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
13658 && elf_next_in_group (o
) == NULL
)))
13660 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
13665 /* Allow the backend to mark additional target specific sections. */
13666 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
13668 /* ... and mark SEC_EXCLUDE for those that go. */
13669 return elf_gc_sweep (abfd
, info
);
13672 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
13675 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
13677 struct elf_link_hash_entry
*h
,
13680 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
13681 struct elf_link_hash_entry
**search
, *child
;
13682 size_t extsymcount
;
13683 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13685 /* The sh_info field of the symtab header tells us where the
13686 external symbols start. We don't care about the local symbols at
13688 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
13689 if (!elf_bad_symtab (abfd
))
13690 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
13692 sym_hashes
= elf_sym_hashes (abfd
);
13693 sym_hashes_end
= sym_hashes
+ extsymcount
;
13695 /* Hunt down the child symbol, which is in this section at the same
13696 offset as the relocation. */
13697 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
13699 if ((child
= *search
) != NULL
13700 && (child
->root
.type
== bfd_link_hash_defined
13701 || child
->root
.type
== bfd_link_hash_defweak
)
13702 && child
->root
.u
.def
.section
== sec
13703 && child
->root
.u
.def
.value
== offset
)
13707 /* xgettext:c-format */
13708 _bfd_error_handler (_("%pB: %pA+%#" PRIx64
": no symbol found for INHERIT"),
13709 abfd
, sec
, (uint64_t) offset
);
13710 bfd_set_error (bfd_error_invalid_operation
);
13714 if (!child
->u2
.vtable
)
13716 child
->u2
.vtable
= ((struct elf_link_virtual_table_entry
*)
13717 bfd_zalloc (abfd
, sizeof (*child
->u2
.vtable
)));
13718 if (!child
->u2
.vtable
)
13723 /* This *should* only be the absolute section. It could potentially
13724 be that someone has defined a non-global vtable though, which
13725 would be bad. It isn't worth paging in the local symbols to be
13726 sure though; that case should simply be handled by the assembler. */
13728 child
->u2
.vtable
->parent
= (struct elf_link_hash_entry
*) -1;
13731 child
->u2
.vtable
->parent
= h
;
13736 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
13739 bfd_elf_gc_record_vtentry (bfd
*abfd
, asection
*sec
,
13740 struct elf_link_hash_entry
*h
,
13743 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13744 unsigned int log_file_align
= bed
->s
->log_file_align
;
13748 /* xgettext:c-format */
13749 _bfd_error_handler (_("%pB: section '%pA': corrupt VTENTRY entry"),
13751 bfd_set_error (bfd_error_bad_value
);
13757 h
->u2
.vtable
= ((struct elf_link_virtual_table_entry
*)
13758 bfd_zalloc (abfd
, sizeof (*h
->u2
.vtable
)));
13763 if (addend
>= h
->u2
.vtable
->size
)
13765 size_t size
, bytes
, file_align
;
13766 bfd_boolean
*ptr
= h
->u2
.vtable
->used
;
13768 /* While the symbol is undefined, we have to be prepared to handle
13770 file_align
= 1 << log_file_align
;
13771 if (h
->root
.type
== bfd_link_hash_undefined
)
13772 size
= addend
+ file_align
;
13776 if (addend
>= size
)
13778 /* Oops! We've got a reference past the defined end of
13779 the table. This is probably a bug -- shall we warn? */
13780 size
= addend
+ file_align
;
13783 size
= (size
+ file_align
- 1) & -file_align
;
13785 /* Allocate one extra entry for use as a "done" flag for the
13786 consolidation pass. */
13787 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
13791 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
13797 oldbytes
= (((h
->u2
.vtable
->size
>> log_file_align
) + 1)
13798 * sizeof (bfd_boolean
));
13799 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
13803 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
13808 /* And arrange for that done flag to be at index -1. */
13809 h
->u2
.vtable
->used
= ptr
+ 1;
13810 h
->u2
.vtable
->size
= size
;
13813 h
->u2
.vtable
->used
[addend
>> log_file_align
] = TRUE
;
13818 /* Map an ELF section header flag to its corresponding string. */
13822 flagword flag_value
;
13823 } elf_flags_to_name_table
;
13825 static elf_flags_to_name_table elf_flags_to_names
[] =
13827 { "SHF_WRITE", SHF_WRITE
},
13828 { "SHF_ALLOC", SHF_ALLOC
},
13829 { "SHF_EXECINSTR", SHF_EXECINSTR
},
13830 { "SHF_MERGE", SHF_MERGE
},
13831 { "SHF_STRINGS", SHF_STRINGS
},
13832 { "SHF_INFO_LINK", SHF_INFO_LINK
},
13833 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
13834 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
13835 { "SHF_GROUP", SHF_GROUP
},
13836 { "SHF_TLS", SHF_TLS
},
13837 { "SHF_MASKOS", SHF_MASKOS
},
13838 { "SHF_EXCLUDE", SHF_EXCLUDE
},
13841 /* Returns TRUE if the section is to be included, otherwise FALSE. */
13843 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
13844 struct flag_info
*flaginfo
,
13847 const bfd_vma sh_flags
= elf_section_flags (section
);
13849 if (!flaginfo
->flags_initialized
)
13851 bfd
*obfd
= info
->output_bfd
;
13852 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
13853 struct flag_info_list
*tf
= flaginfo
->flag_list
;
13855 int without_hex
= 0;
13857 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
13860 flagword (*lookup
) (char *);
13862 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
13863 if (lookup
!= NULL
)
13865 flagword hexval
= (*lookup
) ((char *) tf
->name
);
13869 if (tf
->with
== with_flags
)
13870 with_hex
|= hexval
;
13871 else if (tf
->with
== without_flags
)
13872 without_hex
|= hexval
;
13877 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
13879 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
13881 if (tf
->with
== with_flags
)
13882 with_hex
|= elf_flags_to_names
[i
].flag_value
;
13883 else if (tf
->with
== without_flags
)
13884 without_hex
|= elf_flags_to_names
[i
].flag_value
;
13891 info
->callbacks
->einfo
13892 (_("unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
13896 flaginfo
->flags_initialized
= TRUE
;
13897 flaginfo
->only_with_flags
|= with_hex
;
13898 flaginfo
->not_with_flags
|= without_hex
;
13901 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
13904 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
13910 struct alloc_got_off_arg
{
13912 struct bfd_link_info
*info
;
13915 /* We need a special top-level link routine to convert got reference counts
13916 to real got offsets. */
13919 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
13921 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
13922 bfd
*obfd
= gofarg
->info
->output_bfd
;
13923 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
13925 if (h
->got
.refcount
> 0)
13927 h
->got
.offset
= gofarg
->gotoff
;
13928 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
13931 h
->got
.offset
= (bfd_vma
) -1;
13936 /* And an accompanying bit to work out final got entry offsets once
13937 we're done. Should be called from final_link. */
13940 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
13941 struct bfd_link_info
*info
)
13944 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13946 struct alloc_got_off_arg gofarg
;
13948 BFD_ASSERT (abfd
== info
->output_bfd
);
13950 if (! is_elf_hash_table (info
->hash
))
13953 /* The GOT offset is relative to the .got section, but the GOT header is
13954 put into the .got.plt section, if the backend uses it. */
13955 if (bed
->want_got_plt
)
13958 gotoff
= bed
->got_header_size
;
13960 /* Do the local .got entries first. */
13961 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
13963 bfd_signed_vma
*local_got
;
13964 size_t j
, locsymcount
;
13965 Elf_Internal_Shdr
*symtab_hdr
;
13967 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
13970 local_got
= elf_local_got_refcounts (i
);
13974 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
13975 if (elf_bad_symtab (i
))
13976 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
13978 locsymcount
= symtab_hdr
->sh_info
;
13980 for (j
= 0; j
< locsymcount
; ++j
)
13982 if (local_got
[j
] > 0)
13984 local_got
[j
] = gotoff
;
13985 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
13988 local_got
[j
] = (bfd_vma
) -1;
13992 /* Then the global .got entries. .plt refcounts are handled by
13993 adjust_dynamic_symbol */
13994 gofarg
.gotoff
= gotoff
;
13995 gofarg
.info
= info
;
13996 elf_link_hash_traverse (elf_hash_table (info
),
13997 elf_gc_allocate_got_offsets
,
14002 /* Many folk need no more in the way of final link than this, once
14003 got entry reference counting is enabled. */
14006 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
14008 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
14011 /* Invoke the regular ELF backend linker to do all the work. */
14012 return bfd_elf_final_link (abfd
, info
);
14016 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
14018 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
14020 if (rcookie
->bad_symtab
)
14021 rcookie
->rel
= rcookie
->rels
;
14023 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
14025 unsigned long r_symndx
;
14027 if (! rcookie
->bad_symtab
)
14028 if (rcookie
->rel
->r_offset
> offset
)
14030 if (rcookie
->rel
->r_offset
!= offset
)
14033 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
14034 if (r_symndx
== STN_UNDEF
)
14037 if (r_symndx
>= rcookie
->locsymcount
14038 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
14040 struct elf_link_hash_entry
*h
;
14042 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
14044 while (h
->root
.type
== bfd_link_hash_indirect
14045 || h
->root
.type
== bfd_link_hash_warning
)
14046 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14048 if ((h
->root
.type
== bfd_link_hash_defined
14049 || h
->root
.type
== bfd_link_hash_defweak
)
14050 && (h
->root
.u
.def
.section
->owner
!= rcookie
->abfd
14051 || h
->root
.u
.def
.section
->kept_section
!= NULL
14052 || discarded_section (h
->root
.u
.def
.section
)))
14057 /* It's not a relocation against a global symbol,
14058 but it could be a relocation against a local
14059 symbol for a discarded section. */
14061 Elf_Internal_Sym
*isym
;
14063 /* Need to: get the symbol; get the section. */
14064 isym
= &rcookie
->locsyms
[r_symndx
];
14065 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
14067 && (isec
->kept_section
!= NULL
14068 || discarded_section (isec
)))
14076 /* Discard unneeded references to discarded sections.
14077 Returns -1 on error, 1 if any section's size was changed, 0 if
14078 nothing changed. This function assumes that the relocations are in
14079 sorted order, which is true for all known assemblers. */
14082 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
14084 struct elf_reloc_cookie cookie
;
14089 if (info
->traditional_format
14090 || !is_elf_hash_table (info
->hash
))
14093 o
= bfd_get_section_by_name (output_bfd
, ".stab");
14098 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
14101 || i
->reloc_count
== 0
14102 || i
->sec_info_type
!= SEC_INFO_TYPE_STABS
)
14106 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14109 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
14112 if (_bfd_discard_section_stabs (abfd
, i
,
14113 elf_section_data (i
)->sec_info
,
14114 bfd_elf_reloc_symbol_deleted_p
,
14118 fini_reloc_cookie_for_section (&cookie
, i
);
14123 if (info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
)
14124 o
= bfd_get_section_by_name (output_bfd
, ".eh_frame");
14128 int eh_changed
= 0;
14129 unsigned int eh_alignment
;
14131 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
14137 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14140 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
14143 _bfd_elf_parse_eh_frame (abfd
, info
, i
, &cookie
);
14144 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, i
,
14145 bfd_elf_reloc_symbol_deleted_p
,
14149 if (i
->size
!= i
->rawsize
)
14153 fini_reloc_cookie_for_section (&cookie
, i
);
14156 eh_alignment
= 1 << o
->alignment_power
;
14157 /* Skip over zero terminator, and prevent empty sections from
14158 adding alignment padding at the end. */
14159 for (i
= o
->map_tail
.s
; i
!= NULL
; i
= i
->map_tail
.s
)
14161 i
->flags
|= SEC_EXCLUDE
;
14162 else if (i
->size
> 4)
14164 /* The last non-empty eh_frame section doesn't need padding. */
14167 /* Any prior sections must pad the last FDE out to the output
14168 section alignment. Otherwise we might have zero padding
14169 between sections, which would be seen as a terminator. */
14170 for (; i
!= NULL
; i
= i
->map_tail
.s
)
14172 /* All but the last zero terminator should have been removed. */
14177 = (i
->size
+ eh_alignment
- 1) & -eh_alignment
;
14178 if (i
->size
!= size
)
14186 elf_link_hash_traverse (elf_hash_table (info
),
14187 _bfd_elf_adjust_eh_frame_global_symbol
, NULL
);
14190 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link
.next
)
14192 const struct elf_backend_data
*bed
;
14195 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14197 s
= abfd
->sections
;
14198 if (s
== NULL
|| s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
14201 bed
= get_elf_backend_data (abfd
);
14203 if (bed
->elf_backend_discard_info
!= NULL
)
14205 if (!init_reloc_cookie (&cookie
, info
, abfd
))
14208 if ((*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
14211 fini_reloc_cookie (&cookie
, abfd
);
14215 if (info
->eh_frame_hdr_type
== COMPACT_EH_HDR
)
14216 _bfd_elf_end_eh_frame_parsing (info
);
14218 if (info
->eh_frame_hdr_type
14219 && !bfd_link_relocatable (info
)
14220 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
14227 _bfd_elf_section_already_linked (bfd
*abfd
,
14229 struct bfd_link_info
*info
)
14232 const char *name
, *key
;
14233 struct bfd_section_already_linked
*l
;
14234 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
14236 if (sec
->output_section
== bfd_abs_section_ptr
)
14239 flags
= sec
->flags
;
14241 /* Return if it isn't a linkonce section. A comdat group section
14242 also has SEC_LINK_ONCE set. */
14243 if ((flags
& SEC_LINK_ONCE
) == 0)
14246 /* Don't put group member sections on our list of already linked
14247 sections. They are handled as a group via their group section. */
14248 if (elf_sec_group (sec
) != NULL
)
14251 /* For a SHT_GROUP section, use the group signature as the key. */
14253 if ((flags
& SEC_GROUP
) != 0
14254 && elf_next_in_group (sec
) != NULL
14255 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
14256 key
= elf_group_name (elf_next_in_group (sec
));
14259 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
14260 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
14261 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
14264 /* Must be a user linkonce section that doesn't follow gcc's
14265 naming convention. In this case we won't be matching
14266 single member groups. */
14270 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
14272 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14274 /* We may have 2 different types of sections on the list: group
14275 sections with a signature of <key> (<key> is some string),
14276 and linkonce sections named .gnu.linkonce.<type>.<key>.
14277 Match like sections. LTO plugin sections are an exception.
14278 They are always named .gnu.linkonce.t.<key> and match either
14279 type of section. */
14280 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
14281 && ((flags
& SEC_GROUP
) != 0
14282 || strcmp (name
, l
->sec
->name
) == 0))
14283 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0)
14285 /* The section has already been linked. See if we should
14286 issue a warning. */
14287 if (!_bfd_handle_already_linked (sec
, l
, info
))
14290 if (flags
& SEC_GROUP
)
14292 asection
*first
= elf_next_in_group (sec
);
14293 asection
*s
= first
;
14297 s
->output_section
= bfd_abs_section_ptr
;
14298 /* Record which group discards it. */
14299 s
->kept_section
= l
->sec
;
14300 s
= elf_next_in_group (s
);
14301 /* These lists are circular. */
14311 /* A single member comdat group section may be discarded by a
14312 linkonce section and vice versa. */
14313 if ((flags
& SEC_GROUP
) != 0)
14315 asection
*first
= elf_next_in_group (sec
);
14317 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
14318 /* Check this single member group against linkonce sections. */
14319 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14320 if ((l
->sec
->flags
& SEC_GROUP
) == 0
14321 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
14323 first
->output_section
= bfd_abs_section_ptr
;
14324 first
->kept_section
= l
->sec
;
14325 sec
->output_section
= bfd_abs_section_ptr
;
14330 /* Check this linkonce section against single member groups. */
14331 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14332 if (l
->sec
->flags
& SEC_GROUP
)
14334 asection
*first
= elf_next_in_group (l
->sec
);
14337 && elf_next_in_group (first
) == first
14338 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
14340 sec
->output_section
= bfd_abs_section_ptr
;
14341 sec
->kept_section
= first
;
14346 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
14347 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
14348 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
14349 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
14350 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
14351 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
14352 `.gnu.linkonce.t.F' section from a different bfd not requiring any
14353 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
14354 The reverse order cannot happen as there is never a bfd with only the
14355 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
14356 matter as here were are looking only for cross-bfd sections. */
14358 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
14359 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14360 if ((l
->sec
->flags
& SEC_GROUP
) == 0
14361 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
14363 if (abfd
!= l
->sec
->owner
)
14364 sec
->output_section
= bfd_abs_section_ptr
;
14368 /* This is the first section with this name. Record it. */
14369 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
14370 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
14371 return sec
->output_section
== bfd_abs_section_ptr
;
14375 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
14377 return sym
->st_shndx
== SHN_COMMON
;
14381 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
14387 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
14389 return bfd_com_section_ptr
;
14393 _bfd_elf_default_got_elt_size (bfd
*abfd
,
14394 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
14395 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
14396 bfd
*ibfd ATTRIBUTE_UNUSED
,
14397 unsigned long symndx ATTRIBUTE_UNUSED
)
14399 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14400 return bed
->s
->arch_size
/ 8;
14403 /* Routines to support the creation of dynamic relocs. */
14405 /* Returns the name of the dynamic reloc section associated with SEC. */
14407 static const char *
14408 get_dynamic_reloc_section_name (bfd
* abfd
,
14410 bfd_boolean is_rela
)
14413 const char *old_name
= bfd_get_section_name (NULL
, sec
);
14414 const char *prefix
= is_rela
? ".rela" : ".rel";
14416 if (old_name
== NULL
)
14419 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
14420 sprintf (name
, "%s%s", prefix
, old_name
);
14425 /* Returns the dynamic reloc section associated with SEC.
14426 If necessary compute the name of the dynamic reloc section based
14427 on SEC's name (looked up in ABFD's string table) and the setting
14431 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
14433 bfd_boolean is_rela
)
14435 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
14437 if (reloc_sec
== NULL
)
14439 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
14443 reloc_sec
= bfd_get_linker_section (abfd
, name
);
14445 if (reloc_sec
!= NULL
)
14446 elf_section_data (sec
)->sreloc
= reloc_sec
;
14453 /* Returns the dynamic reloc section associated with SEC. If the
14454 section does not exist it is created and attached to the DYNOBJ
14455 bfd and stored in the SRELOC field of SEC's elf_section_data
14458 ALIGNMENT is the alignment for the newly created section and
14459 IS_RELA defines whether the name should be .rela.<SEC's name>
14460 or .rel.<SEC's name>. The section name is looked up in the
14461 string table associated with ABFD. */
14464 _bfd_elf_make_dynamic_reloc_section (asection
*sec
,
14466 unsigned int alignment
,
14468 bfd_boolean is_rela
)
14470 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
14472 if (reloc_sec
== NULL
)
14474 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
14479 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
14481 if (reloc_sec
== NULL
)
14483 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
14484 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
14485 if ((sec
->flags
& SEC_ALLOC
) != 0)
14486 flags
|= SEC_ALLOC
| SEC_LOAD
;
14488 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
14489 if (reloc_sec
!= NULL
)
14491 /* _bfd_elf_get_sec_type_attr chooses a section type by
14492 name. Override as it may be wrong, eg. for a user
14493 section named "auto" we'll get ".relauto" which is
14494 seen to be a .rela section. */
14495 elf_section_type (reloc_sec
) = is_rela
? SHT_RELA
: SHT_REL
;
14496 if (! bfd_set_section_alignment (dynobj
, reloc_sec
, alignment
))
14501 elf_section_data (sec
)->sreloc
= reloc_sec
;
14507 /* Copy the ELF symbol type and other attributes for a linker script
14508 assignment from HSRC to HDEST. Generally this should be treated as
14509 if we found a strong non-dynamic definition for HDEST (except that
14510 ld ignores multiple definition errors). */
14512 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd
,
14513 struct bfd_link_hash_entry
*hdest
,
14514 struct bfd_link_hash_entry
*hsrc
)
14516 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*) hdest
;
14517 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*) hsrc
;
14518 Elf_Internal_Sym isym
;
14520 ehdest
->type
= ehsrc
->type
;
14521 ehdest
->target_internal
= ehsrc
->target_internal
;
14523 isym
.st_other
= ehsrc
->other
;
14524 elf_merge_st_other (abfd
, ehdest
, &isym
, NULL
, TRUE
, FALSE
);
14527 /* Append a RELA relocation REL to section S in BFD. */
14530 elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
14532 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14533 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
14534 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
14535 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
14538 /* Append a REL relocation REL to section S in BFD. */
14541 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
14543 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14544 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
14545 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
14546 bed
->s
->swap_reloc_out (abfd
, rel
, loc
);
14549 /* Define __start, __stop, .startof. or .sizeof. symbol. */
14551 struct bfd_link_hash_entry
*
14552 bfd_elf_define_start_stop (struct bfd_link_info
*info
,
14553 const char *symbol
, asection
*sec
)
14555 struct elf_link_hash_entry
*h
;
14557 h
= elf_link_hash_lookup (elf_hash_table (info
), symbol
,
14558 FALSE
, FALSE
, TRUE
);
14560 && (h
->root
.type
== bfd_link_hash_undefined
14561 || h
->root
.type
== bfd_link_hash_undefweak
14562 || ((h
->ref_regular
|| h
->def_dynamic
) && !h
->def_regular
)))
14564 bfd_boolean was_dynamic
= h
->ref_dynamic
|| h
->def_dynamic
;
14565 h
->root
.type
= bfd_link_hash_defined
;
14566 h
->root
.u
.def
.section
= sec
;
14567 h
->root
.u
.def
.value
= 0;
14568 h
->def_regular
= 1;
14569 h
->def_dynamic
= 0;
14571 h
->u2
.start_stop_section
= sec
;
14572 if (symbol
[0] == '.')
14574 /* .startof. and .sizeof. symbols are local. */
14575 const struct elf_backend_data
*bed
;
14576 bed
= get_elf_backend_data (info
->output_bfd
);
14577 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
14581 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
14582 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_PROTECTED
;
14584 bfd_elf_link_record_dynamic_symbol (info
, h
);