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
;
4424 unsigned int shindex
;
4426 bfd_boolean matched
;
4430 flags
= BSF_NO_FLAGS
;
4432 value
= isym
->st_value
;
4433 common
= bed
->common_definition (isym
);
4434 if (common
&& info
->inhibit_common_definition
)
4436 /* Treat common symbol as undefined for --no-define-common. */
4437 isym
->st_shndx
= SHN_UNDEF
;
4442 bind
= ELF_ST_BIND (isym
->st_info
);
4446 /* This should be impossible, since ELF requires that all
4447 global symbols follow all local symbols, and that sh_info
4448 point to the first global symbol. Unfortunately, Irix 5
4450 if (elf_bad_symtab (abfd
))
4453 /* If we aren't prepared to handle locals within the globals
4454 then we'll likely segfault on a NULL symbol hash if the
4455 symbol is ever referenced in relocations. */
4456 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
4457 name
= bfd_elf_string_from_elf_section (abfd
, shindex
, hdr
->sh_name
);
4458 _bfd_error_handler (_("%pB: %s local symbol at index %lu"
4459 " (>= sh_info of %lu)"),
4460 abfd
, name
, (long) (isym
- isymbuf
+ extsymoff
),
4463 /* Dynamic object relocations are not processed by ld, so
4464 ld won't run into the problem mentioned above. */
4467 bfd_set_error (bfd_error_bad_value
);
4468 goto error_free_vers
;
4471 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
4479 case STB_GNU_UNIQUE
:
4480 flags
= BSF_GNU_UNIQUE
;
4484 /* Leave it up to the processor backend. */
4488 if (isym
->st_shndx
== SHN_UNDEF
)
4489 sec
= bfd_und_section_ptr
;
4490 else if (isym
->st_shndx
== SHN_ABS
)
4491 sec
= bfd_abs_section_ptr
;
4492 else if (isym
->st_shndx
== SHN_COMMON
)
4494 sec
= bfd_com_section_ptr
;
4495 /* What ELF calls the size we call the value. What ELF
4496 calls the value we call the alignment. */
4497 value
= isym
->st_size
;
4501 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4503 sec
= bfd_abs_section_ptr
;
4504 else if (discarded_section (sec
))
4506 /* Symbols from discarded section are undefined. We keep
4508 sec
= bfd_und_section_ptr
;
4510 isym
->st_shndx
= SHN_UNDEF
;
4512 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
4516 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4519 goto error_free_vers
;
4521 if (isym
->st_shndx
== SHN_COMMON
4522 && (abfd
->flags
& BFD_PLUGIN
) != 0)
4524 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
4528 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
4530 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
4532 goto error_free_vers
;
4536 else if (isym
->st_shndx
== SHN_COMMON
4537 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4538 && !bfd_link_relocatable (info
))
4540 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
4544 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
4545 | SEC_LINKER_CREATED
);
4546 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
4548 goto error_free_vers
;
4552 else if (bed
->elf_add_symbol_hook
)
4554 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
4556 goto error_free_vers
;
4558 /* The hook function sets the name to NULL if this symbol
4559 should be skipped for some reason. */
4564 /* Sanity check that all possibilities were handled. */
4568 /* Silently discard TLS symbols from --just-syms. There's
4569 no way to combine a static TLS block with a new TLS block
4570 for this executable. */
4571 if (ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4572 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
4575 if (bfd_is_und_section (sec
)
4576 || bfd_is_com_section (sec
))
4581 size_change_ok
= FALSE
;
4582 type_change_ok
= bed
->type_change_ok
;
4589 if (is_elf_hash_table (htab
))
4591 Elf_Internal_Versym iver
;
4592 unsigned int vernum
= 0;
4597 if (info
->default_imported_symver
)
4598 /* Use the default symbol version created earlier. */
4599 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
4603 else if (ever
>= extversym_end
)
4605 /* xgettext:c-format */
4606 _bfd_error_handler (_("%pB: not enough version information"),
4608 bfd_set_error (bfd_error_bad_value
);
4609 goto error_free_vers
;
4612 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
4614 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
4616 /* If this is a hidden symbol, or if it is not version
4617 1, we append the version name to the symbol name.
4618 However, we do not modify a non-hidden absolute symbol
4619 if it is not a function, because it might be the version
4620 symbol itself. FIXME: What if it isn't? */
4621 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
4623 && (!bfd_is_abs_section (sec
)
4624 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4627 size_t namelen
, verlen
, newlen
;
4630 if (isym
->st_shndx
!= SHN_UNDEF
)
4632 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4634 else if (vernum
> 1)
4636 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4643 /* xgettext:c-format */
4644 (_("%pB: %s: invalid version %u (max %d)"),
4646 elf_tdata (abfd
)->cverdefs
);
4647 bfd_set_error (bfd_error_bad_value
);
4648 goto error_free_vers
;
4653 /* We cannot simply test for the number of
4654 entries in the VERNEED section since the
4655 numbers for the needed versions do not start
4657 Elf_Internal_Verneed
*t
;
4660 for (t
= elf_tdata (abfd
)->verref
;
4664 Elf_Internal_Vernaux
*a
;
4666 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4668 if (a
->vna_other
== vernum
)
4670 verstr
= a
->vna_nodename
;
4680 /* xgettext:c-format */
4681 (_("%pB: %s: invalid needed version %d"),
4682 abfd
, name
, vernum
);
4683 bfd_set_error (bfd_error_bad_value
);
4684 goto error_free_vers
;
4688 namelen
= strlen (name
);
4689 verlen
= strlen (verstr
);
4690 newlen
= namelen
+ verlen
+ 2;
4691 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4692 && isym
->st_shndx
!= SHN_UNDEF
)
4695 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4696 if (newname
== NULL
)
4697 goto error_free_vers
;
4698 memcpy (newname
, name
, namelen
);
4699 p
= newname
+ namelen
;
4701 /* If this is a defined non-hidden version symbol,
4702 we add another @ to the name. This indicates the
4703 default version of the symbol. */
4704 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4705 && isym
->st_shndx
!= SHN_UNDEF
)
4707 memcpy (p
, verstr
, verlen
+ 1);
4712 /* If this symbol has default visibility and the user has
4713 requested we not re-export it, then mark it as hidden. */
4714 if (!bfd_is_und_section (sec
)
4717 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_INTERNAL
)
4718 isym
->st_other
= (STV_HIDDEN
4719 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
4721 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
4722 sym_hash
, &old_bfd
, &old_weak
,
4723 &old_alignment
, &skip
, &override
,
4724 &type_change_ok
, &size_change_ok
,
4726 goto error_free_vers
;
4731 /* Override a definition only if the new symbol matches the
4733 if (override
&& matched
)
4737 while (h
->root
.type
== bfd_link_hash_indirect
4738 || h
->root
.type
== bfd_link_hash_warning
)
4739 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4741 if (elf_tdata (abfd
)->verdef
!= NULL
4744 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4747 if (! (_bfd_generic_link_add_one_symbol
4748 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, bed
->collect
,
4749 (struct bfd_link_hash_entry
**) sym_hash
)))
4750 goto error_free_vers
;
4753 /* We need to make sure that indirect symbol dynamic flags are
4756 while (h
->root
.type
== bfd_link_hash_indirect
4757 || h
->root
.type
== bfd_link_hash_warning
)
4758 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4760 /* Setting the index to -3 tells elf_link_output_extsym that
4761 this symbol is defined in a discarded section. */
4767 new_weak
= (flags
& BSF_WEAK
) != 0;
4771 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4772 && is_elf_hash_table (htab
)
4773 && h
->u
.alias
== NULL
)
4775 /* Keep a list of all weak defined non function symbols from
4776 a dynamic object, using the alias field. Later in this
4777 function we will set the alias field to the correct
4778 value. We only put non-function symbols from dynamic
4779 objects on this list, because that happens to be the only
4780 time we need to know the normal symbol corresponding to a
4781 weak symbol, and the information is time consuming to
4782 figure out. If the alias field is not already NULL,
4783 then this symbol was already defined by some previous
4784 dynamic object, and we will be using that previous
4785 definition anyhow. */
4791 /* Set the alignment of a common symbol. */
4792 if ((common
|| bfd_is_com_section (sec
))
4793 && h
->root
.type
== bfd_link_hash_common
)
4798 align
= bfd_log2 (isym
->st_value
);
4801 /* The new symbol is a common symbol in a shared object.
4802 We need to get the alignment from the section. */
4803 align
= new_sec
->alignment_power
;
4805 if (align
> old_alignment
)
4806 h
->root
.u
.c
.p
->alignment_power
= align
;
4808 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
4811 if (is_elf_hash_table (htab
))
4813 /* Set a flag in the hash table entry indicating the type of
4814 reference or definition we just found. A dynamic symbol
4815 is one which is referenced or defined by both a regular
4816 object and a shared object. */
4817 bfd_boolean dynsym
= FALSE
;
4819 /* Plugin symbols aren't normal. Don't set def_regular or
4820 ref_regular for them, or make them dynamic. */
4821 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4828 if (bind
!= STB_WEAK
)
4829 h
->ref_regular_nonweak
= 1;
4841 /* If the indirect symbol has been forced local, don't
4842 make the real symbol dynamic. */
4843 if ((h
== hi
|| !hi
->forced_local
)
4844 && (bfd_link_dll (info
)
4854 hi
->ref_dynamic
= 1;
4859 hi
->def_dynamic
= 1;
4862 /* If the indirect symbol has been forced local, don't
4863 make the real symbol dynamic. */
4864 if ((h
== hi
|| !hi
->forced_local
)
4868 && weakdef (h
)->dynindx
!= -1)))
4872 /* Check to see if we need to add an indirect symbol for
4873 the default name. */
4875 || (!override
&& h
->root
.type
== bfd_link_hash_common
))
4876 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
4877 sec
, value
, &old_bfd
, &dynsym
))
4878 goto error_free_vers
;
4880 /* Check the alignment when a common symbol is involved. This
4881 can change when a common symbol is overridden by a normal
4882 definition or a common symbol is ignored due to the old
4883 normal definition. We need to make sure the maximum
4884 alignment is maintained. */
4885 if ((old_alignment
|| common
)
4886 && h
->root
.type
!= bfd_link_hash_common
)
4888 unsigned int common_align
;
4889 unsigned int normal_align
;
4890 unsigned int symbol_align
;
4894 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
4895 || h
->root
.type
== bfd_link_hash_defweak
);
4897 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
4898 if (h
->root
.u
.def
.section
->owner
!= NULL
4899 && (h
->root
.u
.def
.section
->owner
->flags
4900 & (DYNAMIC
| BFD_PLUGIN
)) == 0)
4902 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
4903 if (normal_align
> symbol_align
)
4904 normal_align
= symbol_align
;
4907 normal_align
= symbol_align
;
4911 common_align
= old_alignment
;
4912 common_bfd
= old_bfd
;
4917 common_align
= bfd_log2 (isym
->st_value
);
4919 normal_bfd
= old_bfd
;
4922 if (normal_align
< common_align
)
4924 /* PR binutils/2735 */
4925 if (normal_bfd
== NULL
)
4927 /* xgettext:c-format */
4928 (_("warning: alignment %u of common symbol `%s' in %pB is"
4929 " greater than the alignment (%u) of its section %pA"),
4930 1 << common_align
, name
, common_bfd
,
4931 1 << normal_align
, h
->root
.u
.def
.section
);
4934 /* xgettext:c-format */
4935 (_("warning: alignment %u of symbol `%s' in %pB"
4936 " is smaller than %u in %pB"),
4937 1 << normal_align
, name
, normal_bfd
,
4938 1 << common_align
, common_bfd
);
4942 /* Remember the symbol size if it isn't undefined. */
4943 if (isym
->st_size
!= 0
4944 && isym
->st_shndx
!= SHN_UNDEF
4945 && (definition
|| h
->size
== 0))
4948 && h
->size
!= isym
->st_size
4949 && ! size_change_ok
)
4951 /* xgettext:c-format */
4952 (_("warning: size of symbol `%s' changed"
4953 " from %" PRIu64
" in %pB to %" PRIu64
" in %pB"),
4954 name
, (uint64_t) h
->size
, old_bfd
,
4955 (uint64_t) isym
->st_size
, abfd
);
4957 h
->size
= isym
->st_size
;
4960 /* If this is a common symbol, then we always want H->SIZE
4961 to be the size of the common symbol. The code just above
4962 won't fix the size if a common symbol becomes larger. We
4963 don't warn about a size change here, because that is
4964 covered by --warn-common. Allow changes between different
4966 if (h
->root
.type
== bfd_link_hash_common
)
4967 h
->size
= h
->root
.u
.c
.size
;
4969 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
4970 && ((definition
&& !new_weak
)
4971 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
4972 || h
->type
== STT_NOTYPE
))
4974 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
4976 /* Turn an IFUNC symbol from a DSO into a normal FUNC
4978 if (type
== STT_GNU_IFUNC
4979 && (abfd
->flags
& DYNAMIC
) != 0)
4982 if (h
->type
!= type
)
4984 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
4985 /* xgettext:c-format */
4987 (_("warning: type of symbol `%s' changed"
4988 " from %d to %d in %pB"),
4989 name
, h
->type
, type
, abfd
);
4995 /* Merge st_other field. */
4996 elf_merge_st_other (abfd
, h
, isym
, sec
, definition
, dynamic
);
4998 /* We don't want to make debug symbol dynamic. */
5000 && (sec
->flags
& SEC_DEBUGGING
)
5001 && !bfd_link_relocatable (info
))
5004 /* Nor should we make plugin symbols dynamic. */
5005 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
5010 h
->target_internal
= isym
->st_target_internal
;
5011 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
5014 if (definition
&& !dynamic
)
5016 char *p
= strchr (name
, ELF_VER_CHR
);
5017 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
5019 /* Queue non-default versions so that .symver x, x@FOO
5020 aliases can be checked. */
5023 amt
= ((isymend
- isym
+ 1)
5024 * sizeof (struct elf_link_hash_entry
*));
5026 = (struct elf_link_hash_entry
**) bfd_malloc (amt
);
5028 goto error_free_vers
;
5030 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
5034 if (dynsym
&& h
->dynindx
== -1)
5036 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
5037 goto error_free_vers
;
5039 && weakdef (h
)->dynindx
== -1)
5041 if (!bfd_elf_link_record_dynamic_symbol (info
, weakdef (h
)))
5042 goto error_free_vers
;
5045 else if (h
->dynindx
!= -1)
5046 /* If the symbol already has a dynamic index, but
5047 visibility says it should not be visible, turn it into
5049 switch (ELF_ST_VISIBILITY (h
->other
))
5053 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
5058 /* Don't add DT_NEEDED for references from the dummy bfd nor
5059 for unmatched symbol. */
5064 && h
->ref_regular_nonweak
5066 || (old_bfd
->flags
& BFD_PLUGIN
) == 0))
5067 || (h
->ref_dynamic_nonweak
5068 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
5069 && !on_needed_list (elf_dt_name (abfd
),
5070 htab
->needed
, NULL
))))
5073 const char *soname
= elf_dt_name (abfd
);
5075 info
->callbacks
->minfo ("%!", soname
, old_bfd
,
5076 h
->root
.root
.string
);
5078 /* A symbol from a library loaded via DT_NEEDED of some
5079 other library is referenced by a regular object.
5080 Add a DT_NEEDED entry for it. Issue an error if
5081 --no-add-needed is used and the reference was not
5084 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
5087 /* xgettext:c-format */
5088 (_("%pB: undefined reference to symbol '%s'"),
5090 bfd_set_error (bfd_error_missing_dso
);
5091 goto error_free_vers
;
5094 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
5095 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
5098 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
5100 goto error_free_vers
;
5102 BFD_ASSERT (ret
== 0);
5107 if (info
->lto_plugin_active
5108 && !bfd_link_relocatable (info
)
5109 && (abfd
->flags
& BFD_PLUGIN
) == 0
5115 if (bed
->s
->arch_size
== 32)
5120 /* If linker plugin is enabled, set non_ir_ref_regular on symbols
5121 referenced in regular objects so that linker plugin will get
5122 the correct symbol resolution. */
5124 sym_hash
= elf_sym_hashes (abfd
);
5125 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5127 Elf_Internal_Rela
*internal_relocs
;
5128 Elf_Internal_Rela
*rel
, *relend
;
5130 /* Don't check relocations in excluded sections. */
5131 if ((s
->flags
& SEC_RELOC
) == 0
5132 || s
->reloc_count
== 0
5133 || (s
->flags
& SEC_EXCLUDE
) != 0
5134 || ((info
->strip
== strip_all
5135 || info
->strip
== strip_debugger
)
5136 && (s
->flags
& SEC_DEBUGGING
) != 0))
5139 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, s
, NULL
,
5142 if (internal_relocs
== NULL
)
5143 goto error_free_vers
;
5145 rel
= internal_relocs
;
5146 relend
= rel
+ s
->reloc_count
;
5147 for ( ; rel
< relend
; rel
++)
5149 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
5150 struct elf_link_hash_entry
*h
;
5152 /* Skip local symbols. */
5153 if (r_symndx
< extsymoff
)
5156 h
= sym_hash
[r_symndx
- extsymoff
];
5158 h
->root
.non_ir_ref_regular
= 1;
5161 if (elf_section_data (s
)->relocs
!= internal_relocs
)
5162 free (internal_relocs
);
5166 if (extversym
!= NULL
)
5172 if (isymbuf
!= NULL
)
5178 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
5182 /* Restore the symbol table. */
5183 old_ent
= (char *) old_tab
+ tabsize
;
5184 memset (elf_sym_hashes (abfd
), 0,
5185 extsymcount
* sizeof (struct elf_link_hash_entry
*));
5186 htab
->root
.table
.table
= old_table
;
5187 htab
->root
.table
.size
= old_size
;
5188 htab
->root
.table
.count
= old_count
;
5189 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
5190 htab
->root
.undefs
= old_undefs
;
5191 htab
->root
.undefs_tail
= old_undefs_tail
;
5192 _bfd_elf_strtab_restore (htab
->dynstr
, old_strtab
);
5195 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
5197 struct bfd_hash_entry
*p
;
5198 struct elf_link_hash_entry
*h
;
5200 unsigned int alignment_power
;
5201 unsigned int non_ir_ref_dynamic
;
5203 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
5205 h
= (struct elf_link_hash_entry
*) p
;
5206 if (h
->root
.type
== bfd_link_hash_warning
)
5207 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5209 /* Preserve the maximum alignment and size for common
5210 symbols even if this dynamic lib isn't on DT_NEEDED
5211 since it can still be loaded at run time by another
5213 if (h
->root
.type
== bfd_link_hash_common
)
5215 size
= h
->root
.u
.c
.size
;
5216 alignment_power
= h
->root
.u
.c
.p
->alignment_power
;
5221 alignment_power
= 0;
5223 /* Preserve non_ir_ref_dynamic so that this symbol
5224 will be exported when the dynamic lib becomes needed
5225 in the second pass. */
5226 non_ir_ref_dynamic
= h
->root
.non_ir_ref_dynamic
;
5227 memcpy (p
, old_ent
, htab
->root
.table
.entsize
);
5228 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
5229 h
= (struct elf_link_hash_entry
*) p
;
5230 if (h
->root
.type
== bfd_link_hash_warning
)
5232 memcpy (h
->root
.u
.i
.link
, old_ent
, htab
->root
.table
.entsize
);
5233 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
5234 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5236 if (h
->root
.type
== bfd_link_hash_common
)
5238 if (size
> h
->root
.u
.c
.size
)
5239 h
->root
.u
.c
.size
= size
;
5240 if (alignment_power
> h
->root
.u
.c
.p
->alignment_power
)
5241 h
->root
.u
.c
.p
->alignment_power
= alignment_power
;
5243 h
->root
.non_ir_ref_dynamic
= non_ir_ref_dynamic
;
5247 /* Make a special call to the linker "notice" function to
5248 tell it that symbols added for crefs may need to be removed. */
5249 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_not_needed
))
5250 goto error_free_vers
;
5253 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
5255 if (nondeflt_vers
!= NULL
)
5256 free (nondeflt_vers
);
5260 if (old_tab
!= NULL
)
5262 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_needed
))
5263 goto error_free_vers
;
5268 /* Now that all the symbols from this input file are created, if
5269 not performing a relocatable link, handle .symver foo, foo@BAR
5270 such that any relocs against foo become foo@BAR. */
5271 if (!bfd_link_relocatable (info
) && nondeflt_vers
!= NULL
)
5275 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
5277 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
5278 char *shortname
, *p
;
5280 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
5282 || (h
->root
.type
!= bfd_link_hash_defined
5283 && h
->root
.type
!= bfd_link_hash_defweak
))
5286 amt
= p
- h
->root
.root
.string
;
5287 shortname
= (char *) bfd_malloc (amt
+ 1);
5289 goto error_free_vers
;
5290 memcpy (shortname
, h
->root
.root
.string
, amt
);
5291 shortname
[amt
] = '\0';
5293 hi
= (struct elf_link_hash_entry
*)
5294 bfd_link_hash_lookup (&htab
->root
, shortname
,
5295 FALSE
, FALSE
, FALSE
);
5297 && hi
->root
.type
== h
->root
.type
5298 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
5299 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
5301 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
5302 hi
->root
.type
= bfd_link_hash_indirect
;
5303 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
5304 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
5305 sym_hash
= elf_sym_hashes (abfd
);
5307 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
5308 if (sym_hash
[symidx
] == hi
)
5310 sym_hash
[symidx
] = h
;
5316 free (nondeflt_vers
);
5317 nondeflt_vers
= NULL
;
5320 /* Now set the alias field correctly for all the weak defined
5321 symbols we found. The only way to do this is to search all the
5322 symbols. Since we only need the information for non functions in
5323 dynamic objects, that's the only time we actually put anything on
5324 the list WEAKS. We need this information so that if a regular
5325 object refers to a symbol defined weakly in a dynamic object, the
5326 real symbol in the dynamic object is also put in the dynamic
5327 symbols; we also must arrange for both symbols to point to the
5328 same memory location. We could handle the general case of symbol
5329 aliasing, but a general symbol alias can only be generated in
5330 assembler code, handling it correctly would be very time
5331 consuming, and other ELF linkers don't handle general aliasing
5335 struct elf_link_hash_entry
**hpp
;
5336 struct elf_link_hash_entry
**hppend
;
5337 struct elf_link_hash_entry
**sorted_sym_hash
;
5338 struct elf_link_hash_entry
*h
;
5341 /* Since we have to search the whole symbol list for each weak
5342 defined symbol, search time for N weak defined symbols will be
5343 O(N^2). Binary search will cut it down to O(NlogN). */
5345 amt
*= sizeof (struct elf_link_hash_entry
*);
5346 sorted_sym_hash
= (struct elf_link_hash_entry
**) bfd_malloc (amt
);
5347 if (sorted_sym_hash
== NULL
)
5349 sym_hash
= sorted_sym_hash
;
5350 hpp
= elf_sym_hashes (abfd
);
5351 hppend
= hpp
+ extsymcount
;
5353 for (; hpp
< hppend
; hpp
++)
5357 && h
->root
.type
== bfd_link_hash_defined
5358 && !bed
->is_function_type (h
->type
))
5366 qsort (sorted_sym_hash
, sym_count
,
5367 sizeof (struct elf_link_hash_entry
*),
5370 while (weaks
!= NULL
)
5372 struct elf_link_hash_entry
*hlook
;
5375 size_t i
, j
, idx
= 0;
5378 weaks
= hlook
->u
.alias
;
5379 hlook
->u
.alias
= NULL
;
5381 if (hlook
->root
.type
!= bfd_link_hash_defined
5382 && hlook
->root
.type
!= bfd_link_hash_defweak
)
5385 slook
= hlook
->root
.u
.def
.section
;
5386 vlook
= hlook
->root
.u
.def
.value
;
5392 bfd_signed_vma vdiff
;
5394 h
= sorted_sym_hash
[idx
];
5395 vdiff
= vlook
- h
->root
.u
.def
.value
;
5402 int sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
5412 /* We didn't find a value/section match. */
5416 /* With multiple aliases, or when the weak symbol is already
5417 strongly defined, we have multiple matching symbols and
5418 the binary search above may land on any of them. Step
5419 one past the matching symbol(s). */
5422 h
= sorted_sym_hash
[idx
];
5423 if (h
->root
.u
.def
.section
!= slook
5424 || h
->root
.u
.def
.value
!= vlook
)
5428 /* Now look back over the aliases. Since we sorted by size
5429 as well as value and section, we'll choose the one with
5430 the largest size. */
5433 h
= sorted_sym_hash
[idx
];
5435 /* Stop if value or section doesn't match. */
5436 if (h
->root
.u
.def
.section
!= slook
5437 || h
->root
.u
.def
.value
!= vlook
)
5439 else if (h
!= hlook
)
5441 struct elf_link_hash_entry
*t
;
5444 hlook
->is_weakalias
= 1;
5446 if (t
->u
.alias
!= NULL
)
5447 while (t
->u
.alias
!= h
)
5451 /* If the weak definition is in the list of dynamic
5452 symbols, make sure the real definition is put
5454 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
5456 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
5459 free (sorted_sym_hash
);
5464 /* If the real definition is in the list of dynamic
5465 symbols, make sure the weak definition is put
5466 there as well. If we don't do this, then the
5467 dynamic loader might not merge the entries for the
5468 real definition and the weak definition. */
5469 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
5471 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
5472 goto err_free_sym_hash
;
5479 free (sorted_sym_hash
);
5482 if (bed
->check_directives
5483 && !(*bed
->check_directives
) (abfd
, info
))
5486 /* If this is a non-traditional link, try to optimize the handling
5487 of the .stab/.stabstr sections. */
5489 && ! info
->traditional_format
5490 && is_elf_hash_table (htab
)
5491 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
5495 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
5496 if (stabstr
!= NULL
)
5498 bfd_size_type string_offset
= 0;
5501 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
5502 if (CONST_STRNEQ (stab
->name
, ".stab")
5503 && (!stab
->name
[5] ||
5504 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
5505 && (stab
->flags
& SEC_MERGE
) == 0
5506 && !bfd_is_abs_section (stab
->output_section
))
5508 struct bfd_elf_section_data
*secdata
;
5510 secdata
= elf_section_data (stab
);
5511 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
5512 stabstr
, &secdata
->sec_info
,
5515 if (secdata
->sec_info
)
5516 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
5521 if (is_elf_hash_table (htab
) && add_needed
)
5523 /* Add this bfd to the loaded list. */
5524 struct elf_link_loaded_list
*n
;
5526 n
= (struct elf_link_loaded_list
*) bfd_alloc (abfd
, sizeof (*n
));
5530 n
->next
= htab
->loaded
;
5537 if (old_tab
!= NULL
)
5539 if (old_strtab
!= NULL
)
5541 if (nondeflt_vers
!= NULL
)
5542 free (nondeflt_vers
);
5543 if (extversym
!= NULL
)
5546 if (isymbuf
!= NULL
)
5552 /* Return the linker hash table entry of a symbol that might be
5553 satisfied by an archive symbol. Return -1 on error. */
5555 struct elf_link_hash_entry
*
5556 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
5557 struct bfd_link_info
*info
,
5560 struct elf_link_hash_entry
*h
;
5564 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
5568 /* If this is a default version (the name contains @@), look up the
5569 symbol again with only one `@' as well as without the version.
5570 The effect is that references to the symbol with and without the
5571 version will be matched by the default symbol in the archive. */
5573 p
= strchr (name
, ELF_VER_CHR
);
5574 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
5577 /* First check with only one `@'. */
5578 len
= strlen (name
);
5579 copy
= (char *) bfd_alloc (abfd
, len
);
5581 return (struct elf_link_hash_entry
*) -1;
5583 first
= p
- name
+ 1;
5584 memcpy (copy
, name
, first
);
5585 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
5587 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
5590 /* We also need to check references to the symbol without the
5592 copy
[first
- 1] = '\0';
5593 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
5594 FALSE
, FALSE
, TRUE
);
5597 bfd_release (abfd
, copy
);
5601 /* Add symbols from an ELF archive file to the linker hash table. We
5602 don't use _bfd_generic_link_add_archive_symbols because we need to
5603 handle versioned symbols.
5605 Fortunately, ELF archive handling is simpler than that done by
5606 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
5607 oddities. In ELF, if we find a symbol in the archive map, and the
5608 symbol is currently undefined, we know that we must pull in that
5611 Unfortunately, we do have to make multiple passes over the symbol
5612 table until nothing further is resolved. */
5615 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5618 unsigned char *included
= NULL
;
5622 const struct elf_backend_data
*bed
;
5623 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
5624 (bfd
*, struct bfd_link_info
*, const char *);
5626 if (! bfd_has_map (abfd
))
5628 /* An empty archive is a special case. */
5629 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
5631 bfd_set_error (bfd_error_no_armap
);
5635 /* Keep track of all symbols we know to be already defined, and all
5636 files we know to be already included. This is to speed up the
5637 second and subsequent passes. */
5638 c
= bfd_ardata (abfd
)->symdef_count
;
5642 amt
*= sizeof (*included
);
5643 included
= (unsigned char *) bfd_zmalloc (amt
);
5644 if (included
== NULL
)
5647 symdefs
= bfd_ardata (abfd
)->symdefs
;
5648 bed
= get_elf_backend_data (abfd
);
5649 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5662 symdefend
= symdef
+ c
;
5663 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5665 struct elf_link_hash_entry
*h
;
5667 struct bfd_link_hash_entry
*undefs_tail
;
5672 if (symdef
->file_offset
== last
)
5678 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5679 if (h
== (struct elf_link_hash_entry
*) -1)
5685 if (h
->root
.type
== bfd_link_hash_common
)
5687 /* We currently have a common symbol. The archive map contains
5688 a reference to this symbol, so we may want to include it. We
5689 only want to include it however, if this archive element
5690 contains a definition of the symbol, not just another common
5693 Unfortunately some archivers (including GNU ar) will put
5694 declarations of common symbols into their archive maps, as
5695 well as real definitions, so we cannot just go by the archive
5696 map alone. Instead we must read in the element's symbol
5697 table and check that to see what kind of symbol definition
5699 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5702 else if (h
->root
.type
!= bfd_link_hash_undefined
)
5704 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5705 /* Symbol must be defined. Don't check it again. */
5710 /* We need to include this archive member. */
5711 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5712 if (element
== NULL
)
5715 if (! bfd_check_format (element
, bfd_object
))
5718 undefs_tail
= info
->hash
->undefs_tail
;
5720 if (!(*info
->callbacks
5721 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5723 if (!bfd_link_add_symbols (element
, info
))
5726 /* If there are any new undefined symbols, we need to make
5727 another pass through the archive in order to see whether
5728 they can be defined. FIXME: This isn't perfect, because
5729 common symbols wind up on undefs_tail and because an
5730 undefined symbol which is defined later on in this pass
5731 does not require another pass. This isn't a bug, but it
5732 does make the code less efficient than it could be. */
5733 if (undefs_tail
!= info
->hash
->undefs_tail
)
5736 /* Look backward to mark all symbols from this object file
5737 which we have already seen in this pass. */
5741 included
[mark
] = TRUE
;
5746 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5748 /* We mark subsequent symbols from this object file as we go
5749 on through the loop. */
5750 last
= symdef
->file_offset
;
5760 if (included
!= NULL
)
5765 /* Given an ELF BFD, add symbols to the global hash table as
5769 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5771 switch (bfd_get_format (abfd
))
5774 return elf_link_add_object_symbols (abfd
, info
);
5776 return elf_link_add_archive_symbols (abfd
, info
);
5778 bfd_set_error (bfd_error_wrong_format
);
5783 struct hash_codes_info
5785 unsigned long *hashcodes
;
5789 /* This function will be called though elf_link_hash_traverse to store
5790 all hash value of the exported symbols in an array. */
5793 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5795 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5800 /* Ignore indirect symbols. These are added by the versioning code. */
5801 if (h
->dynindx
== -1)
5804 name
= h
->root
.root
.string
;
5805 if (h
->versioned
>= versioned
)
5807 char *p
= strchr (name
, ELF_VER_CHR
);
5810 alc
= (char *) bfd_malloc (p
- name
+ 1);
5816 memcpy (alc
, name
, p
- name
);
5817 alc
[p
- name
] = '\0';
5822 /* Compute the hash value. */
5823 ha
= bfd_elf_hash (name
);
5825 /* Store the found hash value in the array given as the argument. */
5826 *(inf
->hashcodes
)++ = ha
;
5828 /* And store it in the struct so that we can put it in the hash table
5830 h
->u
.elf_hash_value
= ha
;
5838 struct collect_gnu_hash_codes
5841 const struct elf_backend_data
*bed
;
5842 unsigned long int nsyms
;
5843 unsigned long int maskbits
;
5844 unsigned long int *hashcodes
;
5845 unsigned long int *hashval
;
5846 unsigned long int *indx
;
5847 unsigned long int *counts
;
5850 long int min_dynindx
;
5851 unsigned long int bucketcount
;
5852 unsigned long int symindx
;
5853 long int local_indx
;
5854 long int shift1
, shift2
;
5855 unsigned long int mask
;
5859 /* This function will be called though elf_link_hash_traverse to store
5860 all hash value of the exported symbols in an array. */
5863 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5865 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5870 /* Ignore indirect symbols. These are added by the versioning code. */
5871 if (h
->dynindx
== -1)
5874 /* Ignore also local symbols and undefined symbols. */
5875 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5878 name
= h
->root
.root
.string
;
5879 if (h
->versioned
>= versioned
)
5881 char *p
= strchr (name
, ELF_VER_CHR
);
5884 alc
= (char *) bfd_malloc (p
- name
+ 1);
5890 memcpy (alc
, name
, p
- name
);
5891 alc
[p
- name
] = '\0';
5896 /* Compute the hash value. */
5897 ha
= bfd_elf_gnu_hash (name
);
5899 /* Store the found hash value in the array for compute_bucket_count,
5900 and also for .dynsym reordering purposes. */
5901 s
->hashcodes
[s
->nsyms
] = ha
;
5902 s
->hashval
[h
->dynindx
] = ha
;
5904 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
5905 s
->min_dynindx
= h
->dynindx
;
5913 /* This function will be called though elf_link_hash_traverse to do
5914 final dynaminc symbol renumbering. */
5917 elf_renumber_gnu_hash_syms (struct elf_link_hash_entry
*h
, void *data
)
5919 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5920 unsigned long int bucket
;
5921 unsigned long int val
;
5923 /* Ignore indirect symbols. */
5924 if (h
->dynindx
== -1)
5927 /* Ignore also local symbols and undefined symbols. */
5928 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5930 if (h
->dynindx
>= s
->min_dynindx
)
5931 h
->dynindx
= s
->local_indx
++;
5935 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
5936 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
5937 & ((s
->maskbits
>> s
->shift1
) - 1);
5938 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
5940 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
5941 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
5942 if (s
->counts
[bucket
] == 1)
5943 /* Last element terminates the chain. */
5945 bfd_put_32 (s
->output_bfd
, val
,
5946 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
5947 --s
->counts
[bucket
];
5948 h
->dynindx
= s
->indx
[bucket
]++;
5952 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5955 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
5957 return !(h
->forced_local
5958 || h
->root
.type
== bfd_link_hash_undefined
5959 || h
->root
.type
== bfd_link_hash_undefweak
5960 || ((h
->root
.type
== bfd_link_hash_defined
5961 || h
->root
.type
== bfd_link_hash_defweak
)
5962 && h
->root
.u
.def
.section
->output_section
== NULL
));
5965 /* Array used to determine the number of hash table buckets to use
5966 based on the number of symbols there are. If there are fewer than
5967 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
5968 fewer than 37 we use 17 buckets, and so forth. We never use more
5969 than 32771 buckets. */
5971 static const size_t elf_buckets
[] =
5973 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
5977 /* Compute bucket count for hashing table. We do not use a static set
5978 of possible tables sizes anymore. Instead we determine for all
5979 possible reasonable sizes of the table the outcome (i.e., the
5980 number of collisions etc) and choose the best solution. The
5981 weighting functions are not too simple to allow the table to grow
5982 without bounds. Instead one of the weighting factors is the size.
5983 Therefore the result is always a good payoff between few collisions
5984 (= short chain lengths) and table size. */
5986 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5987 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
5988 unsigned long int nsyms
,
5991 size_t best_size
= 0;
5992 unsigned long int i
;
5994 /* We have a problem here. The following code to optimize the table
5995 size requires an integer type with more the 32 bits. If
5996 BFD_HOST_U_64_BIT is set we know about such a type. */
5997 #ifdef BFD_HOST_U_64_BIT
6002 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
6003 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
6004 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
6005 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
6006 unsigned long int *counts
;
6008 unsigned int no_improvement_count
= 0;
6010 /* Possible optimization parameters: if we have NSYMS symbols we say
6011 that the hashing table must at least have NSYMS/4 and at most
6013 minsize
= nsyms
/ 4;
6016 best_size
= maxsize
= nsyms
* 2;
6021 if ((best_size
& 31) == 0)
6025 /* Create array where we count the collisions in. We must use bfd_malloc
6026 since the size could be large. */
6028 amt
*= sizeof (unsigned long int);
6029 counts
= (unsigned long int *) bfd_malloc (amt
);
6033 /* Compute the "optimal" size for the hash table. The criteria is a
6034 minimal chain length. The minor criteria is (of course) the size
6036 for (i
= minsize
; i
< maxsize
; ++i
)
6038 /* Walk through the array of hashcodes and count the collisions. */
6039 BFD_HOST_U_64_BIT max
;
6040 unsigned long int j
;
6041 unsigned long int fact
;
6043 if (gnu_hash
&& (i
& 31) == 0)
6046 memset (counts
, '\0', i
* sizeof (unsigned long int));
6048 /* Determine how often each hash bucket is used. */
6049 for (j
= 0; j
< nsyms
; ++j
)
6050 ++counts
[hashcodes
[j
] % i
];
6052 /* For the weight function we need some information about the
6053 pagesize on the target. This is information need not be 100%
6054 accurate. Since this information is not available (so far) we
6055 define it here to a reasonable default value. If it is crucial
6056 to have a better value some day simply define this value. */
6057 # ifndef BFD_TARGET_PAGESIZE
6058 # define BFD_TARGET_PAGESIZE (4096)
6061 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
6063 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
6066 /* Variant 1: optimize for short chains. We add the squares
6067 of all the chain lengths (which favors many small chain
6068 over a few long chains). */
6069 for (j
= 0; j
< i
; ++j
)
6070 max
+= counts
[j
] * counts
[j
];
6072 /* This adds penalties for the overall size of the table. */
6073 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
6076 /* Variant 2: Optimize a lot more for small table. Here we
6077 also add squares of the size but we also add penalties for
6078 empty slots (the +1 term). */
6079 for (j
= 0; j
< i
; ++j
)
6080 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
6082 /* The overall size of the table is considered, but not as
6083 strong as in variant 1, where it is squared. */
6084 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
6088 /* Compare with current best results. */
6089 if (max
< best_chlen
)
6093 no_improvement_count
= 0;
6095 /* PR 11843: Avoid futile long searches for the best bucket size
6096 when there are a large number of symbols. */
6097 else if (++no_improvement_count
== 100)
6104 #endif /* defined (BFD_HOST_U_64_BIT) */
6106 /* This is the fallback solution if no 64bit type is available or if we
6107 are not supposed to spend much time on optimizations. We select the
6108 bucket count using a fixed set of numbers. */
6109 for (i
= 0; elf_buckets
[i
] != 0; i
++)
6111 best_size
= elf_buckets
[i
];
6112 if (nsyms
< elf_buckets
[i
+ 1])
6115 if (gnu_hash
&& best_size
< 2)
6122 /* Size any SHT_GROUP section for ld -r. */
6125 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
6130 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
6131 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
6132 && (s
= ibfd
->sections
) != NULL
6133 && s
->sec_info_type
!= SEC_INFO_TYPE_JUST_SYMS
6134 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
6139 /* Set a default stack segment size. The value in INFO wins. If it
6140 is unset, LEGACY_SYMBOL's value is used, and if that symbol is
6141 undefined it is initialized. */
6144 bfd_elf_stack_segment_size (bfd
*output_bfd
,
6145 struct bfd_link_info
*info
,
6146 const char *legacy_symbol
,
6147 bfd_vma default_size
)
6149 struct elf_link_hash_entry
*h
= NULL
;
6151 /* Look for legacy symbol. */
6153 h
= elf_link_hash_lookup (elf_hash_table (info
), legacy_symbol
,
6154 FALSE
, FALSE
, FALSE
);
6155 if (h
&& (h
->root
.type
== bfd_link_hash_defined
6156 || h
->root
.type
== bfd_link_hash_defweak
)
6158 && (h
->type
== STT_NOTYPE
|| h
->type
== STT_OBJECT
))
6160 /* The symbol has no type if specified on the command line. */
6161 h
->type
= STT_OBJECT
;
6162 if (info
->stacksize
)
6163 /* xgettext:c-format */
6164 _bfd_error_handler (_("%pB: stack size specified and %s set"),
6165 output_bfd
, legacy_symbol
);
6166 else if (h
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
6167 /* xgettext:c-format */
6168 _bfd_error_handler (_("%pB: %s not absolute"),
6169 output_bfd
, legacy_symbol
);
6171 info
->stacksize
= h
->root
.u
.def
.value
;
6174 if (!info
->stacksize
)
6175 /* If the user didn't set a size, or explicitly inhibit the
6176 size, set it now. */
6177 info
->stacksize
= default_size
;
6179 /* Provide the legacy symbol, if it is referenced. */
6180 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
6181 || h
->root
.type
== bfd_link_hash_undefweak
))
6183 struct bfd_link_hash_entry
*bh
= NULL
;
6185 if (!(_bfd_generic_link_add_one_symbol
6186 (info
, output_bfd
, legacy_symbol
,
6187 BSF_GLOBAL
, bfd_abs_section_ptr
,
6188 info
->stacksize
>= 0 ? info
->stacksize
: 0,
6189 NULL
, FALSE
, get_elf_backend_data (output_bfd
)->collect
, &bh
)))
6192 h
= (struct elf_link_hash_entry
*) bh
;
6194 h
->type
= STT_OBJECT
;
6200 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
6202 struct elf_gc_sweep_symbol_info
6204 struct bfd_link_info
*info
;
6205 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
6210 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
6213 && (((h
->root
.type
== bfd_link_hash_defined
6214 || h
->root
.type
== bfd_link_hash_defweak
)
6215 && !((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
6216 && h
->root
.u
.def
.section
->gc_mark
))
6217 || h
->root
.type
== bfd_link_hash_undefined
6218 || h
->root
.type
== bfd_link_hash_undefweak
))
6220 struct elf_gc_sweep_symbol_info
*inf
;
6222 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
6223 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
6226 h
->ref_regular_nonweak
= 0;
6232 /* Set up the sizes and contents of the ELF dynamic sections. This is
6233 called by the ELF linker emulation before_allocation routine. We
6234 must set the sizes of the sections before the linker sets the
6235 addresses of the various sections. */
6238 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
6241 const char *filter_shlib
,
6243 const char *depaudit
,
6244 const char * const *auxiliary_filters
,
6245 struct bfd_link_info
*info
,
6246 asection
**sinterpptr
)
6249 const struct elf_backend_data
*bed
;
6253 if (!is_elf_hash_table (info
->hash
))
6256 dynobj
= elf_hash_table (info
)->dynobj
;
6258 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6260 struct bfd_elf_version_tree
*verdefs
;
6261 struct elf_info_failed asvinfo
;
6262 struct bfd_elf_version_tree
*t
;
6263 struct bfd_elf_version_expr
*d
;
6267 /* If we are supposed to export all symbols into the dynamic symbol
6268 table (this is not the normal case), then do so. */
6269 if (info
->export_dynamic
6270 || (bfd_link_executable (info
) && info
->dynamic
))
6272 struct elf_info_failed eif
;
6276 elf_link_hash_traverse (elf_hash_table (info
),
6277 _bfd_elf_export_symbol
,
6285 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6287 if (soname_indx
== (size_t) -1
6288 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
6292 soname_indx
= (size_t) -1;
6294 /* Make all global versions with definition. */
6295 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
6296 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
6297 if (!d
->symver
&& d
->literal
)
6299 const char *verstr
, *name
;
6300 size_t namelen
, verlen
, newlen
;
6301 char *newname
, *p
, leading_char
;
6302 struct elf_link_hash_entry
*newh
;
6304 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
6306 namelen
= strlen (name
) + (leading_char
!= '\0');
6308 verlen
= strlen (verstr
);
6309 newlen
= namelen
+ verlen
+ 3;
6311 newname
= (char *) bfd_malloc (newlen
);
6312 if (newname
== NULL
)
6314 newname
[0] = leading_char
;
6315 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
6317 /* Check the hidden versioned definition. */
6318 p
= newname
+ namelen
;
6320 memcpy (p
, verstr
, verlen
+ 1);
6321 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6322 newname
, FALSE
, FALSE
,
6325 || (newh
->root
.type
!= bfd_link_hash_defined
6326 && newh
->root
.type
!= bfd_link_hash_defweak
))
6328 /* Check the default versioned definition. */
6330 memcpy (p
, verstr
, verlen
+ 1);
6331 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6332 newname
, FALSE
, FALSE
,
6337 /* Mark this version if there is a definition and it is
6338 not defined in a shared object. */
6340 && !newh
->def_dynamic
6341 && (newh
->root
.type
== bfd_link_hash_defined
6342 || newh
->root
.type
== bfd_link_hash_defweak
))
6346 /* Attach all the symbols to their version information. */
6347 asvinfo
.info
= info
;
6348 asvinfo
.failed
= FALSE
;
6350 elf_link_hash_traverse (elf_hash_table (info
),
6351 _bfd_elf_link_assign_sym_version
,
6356 if (!info
->allow_undefined_version
)
6358 /* Check if all global versions have a definition. */
6359 bfd_boolean all_defined
= TRUE
;
6360 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
6361 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
6362 if (d
->literal
&& !d
->symver
&& !d
->script
)
6365 (_("%s: undefined version: %s"),
6366 d
->pattern
, t
->name
);
6367 all_defined
= FALSE
;
6372 bfd_set_error (bfd_error_bad_value
);
6377 /* Set up the version definition section. */
6378 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
6379 BFD_ASSERT (s
!= NULL
);
6381 /* We may have created additional version definitions if we are
6382 just linking a regular application. */
6383 verdefs
= info
->version_info
;
6385 /* Skip anonymous version tag. */
6386 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
6387 verdefs
= verdefs
->next
;
6389 if (verdefs
== NULL
&& !info
->create_default_symver
)
6390 s
->flags
|= SEC_EXCLUDE
;
6396 Elf_Internal_Verdef def
;
6397 Elf_Internal_Verdaux defaux
;
6398 struct bfd_link_hash_entry
*bh
;
6399 struct elf_link_hash_entry
*h
;
6405 /* Make space for the base version. */
6406 size
+= sizeof (Elf_External_Verdef
);
6407 size
+= sizeof (Elf_External_Verdaux
);
6410 /* Make space for the default version. */
6411 if (info
->create_default_symver
)
6413 size
+= sizeof (Elf_External_Verdef
);
6417 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6419 struct bfd_elf_version_deps
*n
;
6421 /* Don't emit base version twice. */
6425 size
+= sizeof (Elf_External_Verdef
);
6426 size
+= sizeof (Elf_External_Verdaux
);
6429 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6430 size
+= sizeof (Elf_External_Verdaux
);
6434 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6435 if (s
->contents
== NULL
&& s
->size
!= 0)
6438 /* Fill in the version definition section. */
6442 def
.vd_version
= VER_DEF_CURRENT
;
6443 def
.vd_flags
= VER_FLG_BASE
;
6446 if (info
->create_default_symver
)
6448 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6449 def
.vd_next
= sizeof (Elf_External_Verdef
);
6453 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6454 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6455 + sizeof (Elf_External_Verdaux
));
6458 if (soname_indx
!= (size_t) -1)
6460 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6462 def
.vd_hash
= bfd_elf_hash (soname
);
6463 defaux
.vda_name
= soname_indx
;
6470 name
= lbasename (output_bfd
->filename
);
6471 def
.vd_hash
= bfd_elf_hash (name
);
6472 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6474 if (indx
== (size_t) -1)
6476 defaux
.vda_name
= indx
;
6478 defaux
.vda_next
= 0;
6480 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6481 (Elf_External_Verdef
*) p
);
6482 p
+= sizeof (Elf_External_Verdef
);
6483 if (info
->create_default_symver
)
6485 /* Add a symbol representing this version. */
6487 if (! (_bfd_generic_link_add_one_symbol
6488 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6490 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6492 h
= (struct elf_link_hash_entry
*) bh
;
6495 h
->type
= STT_OBJECT
;
6496 h
->verinfo
.vertree
= NULL
;
6498 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6501 /* Create a duplicate of the base version with the same
6502 aux block, but different flags. */
6505 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6507 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6508 + sizeof (Elf_External_Verdaux
));
6511 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6512 (Elf_External_Verdef
*) p
);
6513 p
+= sizeof (Elf_External_Verdef
);
6515 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6516 (Elf_External_Verdaux
*) p
);
6517 p
+= sizeof (Elf_External_Verdaux
);
6519 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6522 struct bfd_elf_version_deps
*n
;
6524 /* Don't emit the base version twice. */
6529 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6532 /* Add a symbol representing this version. */
6534 if (! (_bfd_generic_link_add_one_symbol
6535 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6537 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6539 h
= (struct elf_link_hash_entry
*) bh
;
6542 h
->type
= STT_OBJECT
;
6543 h
->verinfo
.vertree
= t
;
6545 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6548 def
.vd_version
= VER_DEF_CURRENT
;
6550 if (t
->globals
.list
== NULL
6551 && t
->locals
.list
== NULL
6553 def
.vd_flags
|= VER_FLG_WEAK
;
6554 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6555 def
.vd_cnt
= cdeps
+ 1;
6556 def
.vd_hash
= bfd_elf_hash (t
->name
);
6557 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6560 /* If a basever node is next, it *must* be the last node in
6561 the chain, otherwise Verdef construction breaks. */
6562 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6563 BFD_ASSERT (t
->next
->next
== NULL
);
6565 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6566 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6567 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6569 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6570 (Elf_External_Verdef
*) p
);
6571 p
+= sizeof (Elf_External_Verdef
);
6573 defaux
.vda_name
= h
->dynstr_index
;
6574 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6576 defaux
.vda_next
= 0;
6577 if (t
->deps
!= NULL
)
6578 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6579 t
->name_indx
= defaux
.vda_name
;
6581 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6582 (Elf_External_Verdaux
*) p
);
6583 p
+= sizeof (Elf_External_Verdaux
);
6585 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6587 if (n
->version_needed
== NULL
)
6589 /* This can happen if there was an error in the
6591 defaux
.vda_name
= 0;
6595 defaux
.vda_name
= n
->version_needed
->name_indx
;
6596 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6599 if (n
->next
== NULL
)
6600 defaux
.vda_next
= 0;
6602 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6604 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6605 (Elf_External_Verdaux
*) p
);
6606 p
+= sizeof (Elf_External_Verdaux
);
6610 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6614 bed
= get_elf_backend_data (output_bfd
);
6616 if (info
->gc_sections
&& bed
->can_gc_sections
)
6618 struct elf_gc_sweep_symbol_info sweep_info
;
6620 /* Remove the symbols that were in the swept sections from the
6621 dynamic symbol table. */
6622 sweep_info
.info
= info
;
6623 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
6624 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
6628 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6631 struct elf_find_verdep_info sinfo
;
6633 /* Work out the size of the version reference section. */
6635 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6636 BFD_ASSERT (s
!= NULL
);
6639 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6640 if (sinfo
.vers
== 0)
6642 sinfo
.failed
= FALSE
;
6644 elf_link_hash_traverse (elf_hash_table (info
),
6645 _bfd_elf_link_find_version_dependencies
,
6650 if (elf_tdata (output_bfd
)->verref
== NULL
)
6651 s
->flags
|= SEC_EXCLUDE
;
6654 Elf_Internal_Verneed
*vn
;
6659 /* Build the version dependency section. */
6662 for (vn
= elf_tdata (output_bfd
)->verref
;
6664 vn
= vn
->vn_nextref
)
6666 Elf_Internal_Vernaux
*a
;
6668 size
+= sizeof (Elf_External_Verneed
);
6670 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6671 size
+= sizeof (Elf_External_Vernaux
);
6675 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6676 if (s
->contents
== NULL
)
6680 for (vn
= elf_tdata (output_bfd
)->verref
;
6682 vn
= vn
->vn_nextref
)
6685 Elf_Internal_Vernaux
*a
;
6689 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6692 vn
->vn_version
= VER_NEED_CURRENT
;
6694 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6695 elf_dt_name (vn
->vn_bfd
) != NULL
6696 ? elf_dt_name (vn
->vn_bfd
)
6697 : lbasename (vn
->vn_bfd
->filename
),
6699 if (indx
== (size_t) -1)
6702 vn
->vn_aux
= sizeof (Elf_External_Verneed
);
6703 if (vn
->vn_nextref
== NULL
)
6706 vn
->vn_next
= (sizeof (Elf_External_Verneed
)
6707 + caux
* sizeof (Elf_External_Vernaux
));
6709 _bfd_elf_swap_verneed_out (output_bfd
, vn
,
6710 (Elf_External_Verneed
*) p
);
6711 p
+= sizeof (Elf_External_Verneed
);
6713 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6715 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6716 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6717 a
->vna_nodename
, FALSE
);
6718 if (indx
== (size_t) -1)
6721 if (a
->vna_nextptr
== NULL
)
6724 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6726 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6727 (Elf_External_Vernaux
*) p
);
6728 p
+= sizeof (Elf_External_Vernaux
);
6732 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6736 /* Any syms created from now on start with -1 in
6737 got.refcount/offset and plt.refcount/offset. */
6738 elf_hash_table (info
)->init_got_refcount
6739 = elf_hash_table (info
)->init_got_offset
;
6740 elf_hash_table (info
)->init_plt_refcount
6741 = elf_hash_table (info
)->init_plt_offset
;
6743 if (bfd_link_relocatable (info
)
6744 && !_bfd_elf_size_group_sections (info
))
6747 /* The backend may have to create some sections regardless of whether
6748 we're dynamic or not. */
6749 if (bed
->elf_backend_always_size_sections
6750 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
6753 /* Determine any GNU_STACK segment requirements, after the backend
6754 has had a chance to set a default segment size. */
6755 if (info
->execstack
)
6756 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| PF_X
;
6757 else if (info
->noexecstack
)
6758 elf_stack_flags (output_bfd
) = PF_R
| PF_W
;
6762 asection
*notesec
= NULL
;
6765 for (inputobj
= info
->input_bfds
;
6767 inputobj
= inputobj
->link
.next
)
6772 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
6774 s
= inputobj
->sections
;
6775 if (s
== NULL
|| s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
6778 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
6781 if (s
->flags
& SEC_CODE
)
6785 else if (bed
->default_execstack
)
6788 if (notesec
|| info
->stacksize
> 0)
6789 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| exec
;
6790 if (notesec
&& exec
&& bfd_link_relocatable (info
)
6791 && notesec
->output_section
!= bfd_abs_section_ptr
)
6792 notesec
->output_section
->flags
|= SEC_CODE
;
6795 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6797 struct elf_info_failed eif
;
6798 struct elf_link_hash_entry
*h
;
6802 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
6803 BFD_ASSERT (*sinterpptr
!= NULL
|| !bfd_link_executable (info
) || info
->nointerp
);
6807 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
6809 info
->flags
|= DF_SYMBOLIC
;
6817 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
6819 if (indx
== (size_t) -1)
6822 tag
= info
->new_dtags
? DT_RUNPATH
: DT_RPATH
;
6823 if (!_bfd_elf_add_dynamic_entry (info
, tag
, indx
))
6827 if (filter_shlib
!= NULL
)
6831 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6832 filter_shlib
, TRUE
);
6833 if (indx
== (size_t) -1
6834 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
6838 if (auxiliary_filters
!= NULL
)
6840 const char * const *p
;
6842 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
6846 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6848 if (indx
== (size_t) -1
6849 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
6858 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
6860 if (indx
== (size_t) -1
6861 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
6865 if (depaudit
!= NULL
)
6869 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
6871 if (indx
== (size_t) -1
6872 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
6879 /* Find all symbols which were defined in a dynamic object and make
6880 the backend pick a reasonable value for them. */
6881 elf_link_hash_traverse (elf_hash_table (info
),
6882 _bfd_elf_adjust_dynamic_symbol
,
6887 /* Add some entries to the .dynamic section. We fill in some of the
6888 values later, in bfd_elf_final_link, but we must add the entries
6889 now so that we know the final size of the .dynamic section. */
6891 /* If there are initialization and/or finalization functions to
6892 call then add the corresponding DT_INIT/DT_FINI entries. */
6893 h
= (info
->init_function
6894 ? elf_link_hash_lookup (elf_hash_table (info
),
6895 info
->init_function
, FALSE
,
6902 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
6905 h
= (info
->fini_function
6906 ? elf_link_hash_lookup (elf_hash_table (info
),
6907 info
->fini_function
, FALSE
,
6914 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
6918 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
6919 if (s
!= NULL
&& s
->linker_has_input
)
6921 /* DT_PREINIT_ARRAY is not allowed in shared library. */
6922 if (! bfd_link_executable (info
))
6927 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
6928 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
6929 && (o
= sub
->sections
) != NULL
6930 && o
->sec_info_type
!= SEC_INFO_TYPE_JUST_SYMS
)
6931 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
6932 if (elf_section_data (o
)->this_hdr
.sh_type
6933 == SHT_PREINIT_ARRAY
)
6936 (_("%pB: .preinit_array section is not allowed in DSO"),
6941 bfd_set_error (bfd_error_nonrepresentable_section
);
6945 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
6946 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
6949 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
6950 if (s
!= NULL
&& s
->linker_has_input
)
6952 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
6953 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
6956 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
6957 if (s
!= NULL
&& s
->linker_has_input
)
6959 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
6960 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
6964 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
6965 /* If .dynstr is excluded from the link, we don't want any of
6966 these tags. Strictly, we should be checking each section
6967 individually; This quick check covers for the case where
6968 someone does a /DISCARD/ : { *(*) }. */
6969 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
6971 bfd_size_type strsize
;
6973 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6974 if ((info
->emit_hash
6975 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
6976 || (info
->emit_gnu_hash
6977 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0))
6978 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
6979 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
6980 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
6981 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
6982 bed
->s
->sizeof_sym
))
6987 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
6990 /* The backend must work out the sizes of all the other dynamic
6993 && bed
->elf_backend_size_dynamic_sections
!= NULL
6994 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
6997 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6999 if (elf_tdata (output_bfd
)->cverdefs
)
7001 unsigned int crefs
= elf_tdata (output_bfd
)->cverdefs
;
7003 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
7004 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, crefs
))
7008 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
7010 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
7013 else if (info
->flags
& DF_BIND_NOW
)
7015 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
7021 if (bfd_link_executable (info
))
7022 info
->flags_1
&= ~ (DF_1_INITFIRST
7025 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
7029 if (elf_tdata (output_bfd
)->cverrefs
)
7031 unsigned int crefs
= elf_tdata (output_bfd
)->cverrefs
;
7033 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
7034 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
7038 if ((elf_tdata (output_bfd
)->cverrefs
== 0
7039 && elf_tdata (output_bfd
)->cverdefs
== 0)
7040 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
, NULL
) <= 1)
7044 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
7045 s
->flags
|= SEC_EXCLUDE
;
7051 /* Find the first non-excluded output section. We'll use its
7052 section symbol for some emitted relocs. */
7054 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
7057 asection
*found
= NULL
;
7059 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7060 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7061 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7064 if ((s
->flags
& SEC_THREAD_LOCAL
) == 0)
7067 elf_hash_table (info
)->text_index_section
= found
;
7070 /* Find two non-excluded output sections, one for code, one for data.
7071 We'll use their section symbols for some emitted relocs. */
7073 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
7076 asection
*found
= NULL
;
7078 /* Data first, since setting text_index_section changes
7079 _bfd_elf_omit_section_dynsym_default. */
7080 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7081 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7082 && !(s
->flags
& SEC_READONLY
)
7083 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7086 if ((s
->flags
& SEC_THREAD_LOCAL
) == 0)
7089 elf_hash_table (info
)->data_index_section
= found
;
7091 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7092 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7093 && (s
->flags
& SEC_READONLY
)
7094 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7099 elf_hash_table (info
)->text_index_section
= found
;
7103 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
7105 const struct elf_backend_data
*bed
;
7106 unsigned long section_sym_count
;
7107 bfd_size_type dynsymcount
= 0;
7109 if (!is_elf_hash_table (info
->hash
))
7112 bed
= get_elf_backend_data (output_bfd
);
7113 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
7115 /* Assign dynsym indices. In a shared library we generate a section
7116 symbol for each output section, which come first. Next come all
7117 of the back-end allocated local dynamic syms, followed by the rest
7118 of the global symbols.
7120 This is usually not needed for static binaries, however backends
7121 can request to always do it, e.g. the MIPS backend uses dynamic
7122 symbol counts to lay out GOT, which will be produced in the
7123 presence of GOT relocations even in static binaries (holding fixed
7124 data in that case, to satisfy those relocations). */
7126 if (elf_hash_table (info
)->dynamic_sections_created
7127 || bed
->always_renumber_dynsyms
)
7128 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
7129 §ion_sym_count
);
7131 if (elf_hash_table (info
)->dynamic_sections_created
)
7135 unsigned int dtagcount
;
7137 dynobj
= elf_hash_table (info
)->dynobj
;
7139 /* Work out the size of the symbol version section. */
7140 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
7141 BFD_ASSERT (s
!= NULL
);
7142 if ((s
->flags
& SEC_EXCLUDE
) == 0)
7144 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
7145 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7146 if (s
->contents
== NULL
)
7149 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
7153 /* Set the size of the .dynsym and .hash sections. We counted
7154 the number of dynamic symbols in elf_link_add_object_symbols.
7155 We will build the contents of .dynsym and .hash when we build
7156 the final symbol table, because until then we do not know the
7157 correct value to give the symbols. We built the .dynstr
7158 section as we went along in elf_link_add_object_symbols. */
7159 s
= elf_hash_table (info
)->dynsym
;
7160 BFD_ASSERT (s
!= NULL
);
7161 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
7163 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
7164 if (s
->contents
== NULL
)
7167 /* The first entry in .dynsym is a dummy symbol. Clear all the
7168 section syms, in case we don't output them all. */
7169 ++section_sym_count
;
7170 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
7172 elf_hash_table (info
)->bucketcount
= 0;
7174 /* Compute the size of the hashing table. As a side effect this
7175 computes the hash values for all the names we export. */
7176 if (info
->emit_hash
)
7178 unsigned long int *hashcodes
;
7179 struct hash_codes_info hashinf
;
7181 unsigned long int nsyms
;
7183 size_t hash_entry_size
;
7185 /* Compute the hash values for all exported symbols. At the same
7186 time store the values in an array so that we could use them for
7188 amt
= dynsymcount
* sizeof (unsigned long int);
7189 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
7190 if (hashcodes
== NULL
)
7192 hashinf
.hashcodes
= hashcodes
;
7193 hashinf
.error
= FALSE
;
7195 /* Put all hash values in HASHCODES. */
7196 elf_link_hash_traverse (elf_hash_table (info
),
7197 elf_collect_hash_codes
, &hashinf
);
7204 nsyms
= hashinf
.hashcodes
- hashcodes
;
7206 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
7209 if (bucketcount
== 0 && nsyms
> 0)
7212 elf_hash_table (info
)->bucketcount
= bucketcount
;
7214 s
= bfd_get_linker_section (dynobj
, ".hash");
7215 BFD_ASSERT (s
!= NULL
);
7216 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
7217 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
7218 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7219 if (s
->contents
== NULL
)
7222 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
7223 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
7224 s
->contents
+ hash_entry_size
);
7227 if (info
->emit_gnu_hash
)
7230 unsigned char *contents
;
7231 struct collect_gnu_hash_codes cinfo
;
7235 memset (&cinfo
, 0, sizeof (cinfo
));
7237 /* Compute the hash values for all exported symbols. At the same
7238 time store the values in an array so that we could use them for
7240 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
7241 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
7242 if (cinfo
.hashcodes
== NULL
)
7245 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
7246 cinfo
.min_dynindx
= -1;
7247 cinfo
.output_bfd
= output_bfd
;
7250 /* Put all hash values in HASHCODES. */
7251 elf_link_hash_traverse (elf_hash_table (info
),
7252 elf_collect_gnu_hash_codes
, &cinfo
);
7255 free (cinfo
.hashcodes
);
7260 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
7262 if (bucketcount
== 0)
7264 free (cinfo
.hashcodes
);
7268 s
= bfd_get_linker_section (dynobj
, ".gnu.hash");
7269 BFD_ASSERT (s
!= NULL
);
7271 if (cinfo
.nsyms
== 0)
7273 /* Empty .gnu.hash section is special. */
7274 BFD_ASSERT (cinfo
.min_dynindx
== -1);
7275 free (cinfo
.hashcodes
);
7276 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
7277 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7278 if (contents
== NULL
)
7280 s
->contents
= contents
;
7281 /* 1 empty bucket. */
7282 bfd_put_32 (output_bfd
, 1, contents
);
7283 /* SYMIDX above the special symbol 0. */
7284 bfd_put_32 (output_bfd
, 1, contents
+ 4);
7285 /* Just one word for bitmask. */
7286 bfd_put_32 (output_bfd
, 1, contents
+ 8);
7287 /* Only hash fn bloom filter. */
7288 bfd_put_32 (output_bfd
, 0, contents
+ 12);
7289 /* No hashes are valid - empty bitmask. */
7290 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
7291 /* No hashes in the only bucket. */
7292 bfd_put_32 (output_bfd
, 0,
7293 contents
+ 16 + bed
->s
->arch_size
/ 8);
7297 unsigned long int maskwords
, maskbitslog2
, x
;
7298 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
7302 while ((x
>>= 1) != 0)
7304 if (maskbitslog2
< 3)
7306 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
7307 maskbitslog2
= maskbitslog2
+ 3;
7309 maskbitslog2
= maskbitslog2
+ 2;
7310 if (bed
->s
->arch_size
== 64)
7312 if (maskbitslog2
== 5)
7318 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
7319 cinfo
.shift2
= maskbitslog2
;
7320 cinfo
.maskbits
= 1 << maskbitslog2
;
7321 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
7322 amt
= bucketcount
* sizeof (unsigned long int) * 2;
7323 amt
+= maskwords
* sizeof (bfd_vma
);
7324 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
7325 if (cinfo
.bitmask
== NULL
)
7327 free (cinfo
.hashcodes
);
7331 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
7332 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
7333 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
7334 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
7336 /* Determine how often each hash bucket is used. */
7337 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
7338 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
7339 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
7341 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
7342 if (cinfo
.counts
[i
] != 0)
7344 cinfo
.indx
[i
] = cnt
;
7345 cnt
+= cinfo
.counts
[i
];
7347 BFD_ASSERT (cnt
== dynsymcount
);
7348 cinfo
.bucketcount
= bucketcount
;
7349 cinfo
.local_indx
= cinfo
.min_dynindx
;
7351 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
7352 s
->size
+= cinfo
.maskbits
/ 8;
7353 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7354 if (contents
== NULL
)
7356 free (cinfo
.bitmask
);
7357 free (cinfo
.hashcodes
);
7361 s
->contents
= contents
;
7362 bfd_put_32 (output_bfd
, bucketcount
, contents
);
7363 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
7364 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
7365 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
7366 contents
+= 16 + cinfo
.maskbits
/ 8;
7368 for (i
= 0; i
< bucketcount
; ++i
)
7370 if (cinfo
.counts
[i
] == 0)
7371 bfd_put_32 (output_bfd
, 0, contents
);
7373 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
7377 cinfo
.contents
= contents
;
7379 /* Renumber dynamic symbols, populate .gnu.hash section. */
7380 elf_link_hash_traverse (elf_hash_table (info
),
7381 elf_renumber_gnu_hash_syms
, &cinfo
);
7383 contents
= s
->contents
+ 16;
7384 for (i
= 0; i
< maskwords
; ++i
)
7386 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
7388 contents
+= bed
->s
->arch_size
/ 8;
7391 free (cinfo
.bitmask
);
7392 free (cinfo
.hashcodes
);
7396 s
= bfd_get_linker_section (dynobj
, ".dynstr");
7397 BFD_ASSERT (s
!= NULL
);
7399 elf_finalize_dynstr (output_bfd
, info
);
7401 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
7403 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
7404 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
7411 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
7414 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
7417 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
7418 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
7421 /* Finish SHF_MERGE section merging. */
7424 _bfd_elf_merge_sections (bfd
*obfd
, struct bfd_link_info
*info
)
7429 if (!is_elf_hash_table (info
->hash
))
7432 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
7433 if ((ibfd
->flags
& DYNAMIC
) == 0
7434 && bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
7435 && (elf_elfheader (ibfd
)->e_ident
[EI_CLASS
]
7436 == get_elf_backend_data (obfd
)->s
->elfclass
))
7437 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
7438 if ((sec
->flags
& SEC_MERGE
) != 0
7439 && !bfd_is_abs_section (sec
->output_section
))
7441 struct bfd_elf_section_data
*secdata
;
7443 secdata
= elf_section_data (sec
);
7444 if (! _bfd_add_merge_section (obfd
,
7445 &elf_hash_table (info
)->merge_info
,
7446 sec
, &secdata
->sec_info
))
7448 else if (secdata
->sec_info
)
7449 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
7452 if (elf_hash_table (info
)->merge_info
!= NULL
)
7453 _bfd_merge_sections (obfd
, info
, elf_hash_table (info
)->merge_info
,
7454 merge_sections_remove_hook
);
7458 /* Create an entry in an ELF linker hash table. */
7460 struct bfd_hash_entry
*
7461 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
7462 struct bfd_hash_table
*table
,
7465 /* Allocate the structure if it has not already been allocated by a
7469 entry
= (struct bfd_hash_entry
*)
7470 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
7475 /* Call the allocation method of the superclass. */
7476 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
7479 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
7480 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
7482 /* Set local fields. */
7485 ret
->got
= htab
->init_got_refcount
;
7486 ret
->plt
= htab
->init_plt_refcount
;
7487 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
7488 - offsetof (struct elf_link_hash_entry
, size
)));
7489 /* Assume that we have been called by a non-ELF symbol reader.
7490 This flag is then reset by the code which reads an ELF input
7491 file. This ensures that a symbol created by a non-ELF symbol
7492 reader will have the flag set correctly. */
7499 /* Copy data from an indirect symbol to its direct symbol, hiding the
7500 old indirect symbol. Also used for copying flags to a weakdef. */
7503 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
7504 struct elf_link_hash_entry
*dir
,
7505 struct elf_link_hash_entry
*ind
)
7507 struct elf_link_hash_table
*htab
;
7509 /* Copy down any references that we may have already seen to the
7510 symbol which just became indirect. */
7512 if (dir
->versioned
!= versioned_hidden
)
7513 dir
->ref_dynamic
|= ind
->ref_dynamic
;
7514 dir
->ref_regular
|= ind
->ref_regular
;
7515 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
7516 dir
->non_got_ref
|= ind
->non_got_ref
;
7517 dir
->needs_plt
|= ind
->needs_plt
;
7518 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
7520 if (ind
->root
.type
!= bfd_link_hash_indirect
)
7523 /* Copy over the global and procedure linkage table refcount entries.
7524 These may have been already set up by a check_relocs routine. */
7525 htab
= elf_hash_table (info
);
7526 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
7528 if (dir
->got
.refcount
< 0)
7529 dir
->got
.refcount
= 0;
7530 dir
->got
.refcount
+= ind
->got
.refcount
;
7531 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
7534 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
7536 if (dir
->plt
.refcount
< 0)
7537 dir
->plt
.refcount
= 0;
7538 dir
->plt
.refcount
+= ind
->plt
.refcount
;
7539 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
7542 if (ind
->dynindx
!= -1)
7544 if (dir
->dynindx
!= -1)
7545 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
7546 dir
->dynindx
= ind
->dynindx
;
7547 dir
->dynstr_index
= ind
->dynstr_index
;
7549 ind
->dynstr_index
= 0;
7554 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
7555 struct elf_link_hash_entry
*h
,
7556 bfd_boolean force_local
)
7558 /* STT_GNU_IFUNC symbol must go through PLT. */
7559 if (h
->type
!= STT_GNU_IFUNC
)
7561 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
7566 h
->forced_local
= 1;
7567 if (h
->dynindx
!= -1)
7569 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
7572 h
->dynstr_index
= 0;
7577 /* Hide a symbol. */
7580 _bfd_elf_link_hide_symbol (bfd
*output_bfd
,
7581 struct bfd_link_info
*info
,
7582 struct bfd_link_hash_entry
*h
)
7584 if (is_elf_hash_table (info
->hash
))
7586 const struct elf_backend_data
*bed
7587 = get_elf_backend_data (output_bfd
);
7588 struct elf_link_hash_entry
*eh
7589 = (struct elf_link_hash_entry
*) h
;
7590 bed
->elf_backend_hide_symbol (info
, eh
, TRUE
);
7591 eh
->def_dynamic
= 0;
7592 eh
->ref_dynamic
= 0;
7593 eh
->dynamic_def
= 0;
7597 /* Initialize an ELF linker hash table. *TABLE has been zeroed by our
7601 _bfd_elf_link_hash_table_init
7602 (struct elf_link_hash_table
*table
,
7604 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
7605 struct bfd_hash_table
*,
7607 unsigned int entsize
,
7608 enum elf_target_id target_id
)
7611 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
7613 table
->init_got_refcount
.refcount
= can_refcount
- 1;
7614 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
7615 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
7616 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
7617 /* The first dynamic symbol is a dummy. */
7618 table
->dynsymcount
= 1;
7620 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
7622 table
->root
.type
= bfd_link_elf_hash_table
;
7623 table
->hash_table_id
= target_id
;
7628 /* Create an ELF linker hash table. */
7630 struct bfd_link_hash_table
*
7631 _bfd_elf_link_hash_table_create (bfd
*abfd
)
7633 struct elf_link_hash_table
*ret
;
7634 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
7636 ret
= (struct elf_link_hash_table
*) bfd_zmalloc (amt
);
7640 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
7641 sizeof (struct elf_link_hash_entry
),
7647 ret
->root
.hash_table_free
= _bfd_elf_link_hash_table_free
;
7652 /* Destroy an ELF linker hash table. */
7655 _bfd_elf_link_hash_table_free (bfd
*obfd
)
7657 struct elf_link_hash_table
*htab
;
7659 htab
= (struct elf_link_hash_table
*) obfd
->link
.hash
;
7660 if (htab
->dynstr
!= NULL
)
7661 _bfd_elf_strtab_free (htab
->dynstr
);
7662 _bfd_merge_sections_free (htab
->merge_info
);
7663 _bfd_generic_link_hash_table_free (obfd
);
7666 /* This is a hook for the ELF emulation code in the generic linker to
7667 tell the backend linker what file name to use for the DT_NEEDED
7668 entry for a dynamic object. */
7671 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
7673 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7674 && bfd_get_format (abfd
) == bfd_object
)
7675 elf_dt_name (abfd
) = name
;
7679 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
7682 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7683 && bfd_get_format (abfd
) == bfd_object
)
7684 lib_class
= elf_dyn_lib_class (abfd
);
7691 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
7693 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7694 && bfd_get_format (abfd
) == bfd_object
)
7695 elf_dyn_lib_class (abfd
) = lib_class
;
7698 /* Get the list of DT_NEEDED entries for a link. This is a hook for
7699 the linker ELF emulation code. */
7701 struct bfd_link_needed_list
*
7702 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7703 struct bfd_link_info
*info
)
7705 if (! is_elf_hash_table (info
->hash
))
7707 return elf_hash_table (info
)->needed
;
7710 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
7711 hook for the linker ELF emulation code. */
7713 struct bfd_link_needed_list
*
7714 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7715 struct bfd_link_info
*info
)
7717 if (! is_elf_hash_table (info
->hash
))
7719 return elf_hash_table (info
)->runpath
;
7722 /* Get the name actually used for a dynamic object for a link. This
7723 is the SONAME entry if there is one. Otherwise, it is the string
7724 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
7727 bfd_elf_get_dt_soname (bfd
*abfd
)
7729 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7730 && bfd_get_format (abfd
) == bfd_object
)
7731 return elf_dt_name (abfd
);
7735 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
7736 the ELF linker emulation code. */
7739 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
7740 struct bfd_link_needed_list
**pneeded
)
7743 bfd_byte
*dynbuf
= NULL
;
7744 unsigned int elfsec
;
7745 unsigned long shlink
;
7746 bfd_byte
*extdyn
, *extdynend
;
7748 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
7752 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
7753 || bfd_get_format (abfd
) != bfd_object
)
7756 s
= bfd_get_section_by_name (abfd
, ".dynamic");
7757 if (s
== NULL
|| s
->size
== 0)
7760 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
7763 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
7764 if (elfsec
== SHN_BAD
)
7767 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
7769 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
7770 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
7773 extdynend
= extdyn
+ s
->size
;
7774 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
7776 Elf_Internal_Dyn dyn
;
7778 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
7780 if (dyn
.d_tag
== DT_NULL
)
7783 if (dyn
.d_tag
== DT_NEEDED
)
7786 struct bfd_link_needed_list
*l
;
7787 unsigned int tagv
= dyn
.d_un
.d_val
;
7790 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
7795 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
7816 struct elf_symbuf_symbol
7818 unsigned long st_name
; /* Symbol name, index in string tbl */
7819 unsigned char st_info
; /* Type and binding attributes */
7820 unsigned char st_other
; /* Visibilty, and target specific */
7823 struct elf_symbuf_head
7825 struct elf_symbuf_symbol
*ssym
;
7827 unsigned int st_shndx
;
7834 Elf_Internal_Sym
*isym
;
7835 struct elf_symbuf_symbol
*ssym
;
7840 /* Sort references to symbols by ascending section number. */
7843 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7845 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
7846 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
7848 return s1
->st_shndx
- s2
->st_shndx
;
7852 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7854 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7855 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7856 return strcmp (s1
->name
, s2
->name
);
7859 static struct elf_symbuf_head
*
7860 elf_create_symbuf (size_t symcount
, Elf_Internal_Sym
*isymbuf
)
7862 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
7863 struct elf_symbuf_symbol
*ssym
;
7864 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
7865 size_t i
, shndx_count
, total_size
;
7867 indbuf
= (Elf_Internal_Sym
**) bfd_malloc2 (symcount
, sizeof (*indbuf
));
7871 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
7872 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
)
7873 *ind
++ = &isymbuf
[i
];
7876 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
7877 elf_sort_elf_symbol
);
7880 if (indbufend
> indbuf
)
7881 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
7882 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
7885 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
7886 + (indbufend
- indbuf
) * sizeof (*ssym
));
7887 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
7888 if (ssymbuf
== NULL
)
7894 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
7895 ssymbuf
->ssym
= NULL
;
7896 ssymbuf
->count
= shndx_count
;
7897 ssymbuf
->st_shndx
= 0;
7898 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
7900 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
7903 ssymhead
->ssym
= ssym
;
7904 ssymhead
->count
= 0;
7905 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
7907 ssym
->st_name
= (*ind
)->st_name
;
7908 ssym
->st_info
= (*ind
)->st_info
;
7909 ssym
->st_other
= (*ind
)->st_other
;
7912 BFD_ASSERT ((size_t) (ssymhead
- ssymbuf
) == shndx_count
7913 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
7920 /* Check if 2 sections define the same set of local and global
7924 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
7925 struct bfd_link_info
*info
)
7928 const struct elf_backend_data
*bed1
, *bed2
;
7929 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7930 size_t symcount1
, symcount2
;
7931 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7932 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
7933 Elf_Internal_Sym
*isym
, *isymend
;
7934 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
7935 size_t count1
, count2
, i
;
7936 unsigned int shndx1
, shndx2
;
7942 /* Both sections have to be in ELF. */
7943 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7944 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7947 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7950 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7951 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7952 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
7955 bed1
= get_elf_backend_data (bfd1
);
7956 bed2
= get_elf_backend_data (bfd2
);
7957 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7958 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7959 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7960 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7962 if (symcount1
== 0 || symcount2
== 0)
7968 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
7969 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
7971 if (ssymbuf1
== NULL
)
7973 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7975 if (isymbuf1
== NULL
)
7978 if (!info
->reduce_memory_overheads
)
7979 elf_tdata (bfd1
)->symbuf
= ssymbuf1
7980 = elf_create_symbuf (symcount1
, isymbuf1
);
7983 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
7985 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7987 if (isymbuf2
== NULL
)
7990 if (ssymbuf1
!= NULL
&& !info
->reduce_memory_overheads
)
7991 elf_tdata (bfd2
)->symbuf
= ssymbuf2
7992 = elf_create_symbuf (symcount2
, isymbuf2
);
7995 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
7997 /* Optimized faster version. */
7999 struct elf_symbol
*symp
;
8000 struct elf_symbuf_symbol
*ssym
, *ssymend
;
8003 hi
= ssymbuf1
->count
;
8008 mid
= (lo
+ hi
) / 2;
8009 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
8011 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
8015 count1
= ssymbuf1
[mid
].count
;
8022 hi
= ssymbuf2
->count
;
8027 mid
= (lo
+ hi
) / 2;
8028 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
8030 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
8034 count2
= ssymbuf2
[mid
].count
;
8040 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8044 = (struct elf_symbol
*) bfd_malloc (count1
* sizeof (*symtable1
));
8046 = (struct elf_symbol
*) bfd_malloc (count2
* sizeof (*symtable2
));
8047 if (symtable1
== NULL
|| symtable2
== NULL
)
8051 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
8052 ssym
< ssymend
; ssym
++, symp
++)
8054 symp
->u
.ssym
= ssym
;
8055 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8061 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
8062 ssym
< ssymend
; ssym
++, symp
++)
8064 symp
->u
.ssym
= ssym
;
8065 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8070 /* Sort symbol by name. */
8071 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8072 elf_sym_name_compare
);
8073 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8074 elf_sym_name_compare
);
8076 for (i
= 0; i
< count1
; i
++)
8077 /* Two symbols must have the same binding, type and name. */
8078 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
8079 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
8080 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8087 symtable1
= (struct elf_symbol
*)
8088 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
8089 symtable2
= (struct elf_symbol
*)
8090 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
8091 if (symtable1
== NULL
|| symtable2
== NULL
)
8094 /* Count definitions in the section. */
8096 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
8097 if (isym
->st_shndx
== shndx1
)
8098 symtable1
[count1
++].u
.isym
= isym
;
8101 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
8102 if (isym
->st_shndx
== shndx2
)
8103 symtable2
[count2
++].u
.isym
= isym
;
8105 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8108 for (i
= 0; i
< count1
; i
++)
8110 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
8111 symtable1
[i
].u
.isym
->st_name
);
8113 for (i
= 0; i
< count2
; i
++)
8115 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
8116 symtable2
[i
].u
.isym
->st_name
);
8118 /* Sort symbol by name. */
8119 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8120 elf_sym_name_compare
);
8121 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8122 elf_sym_name_compare
);
8124 for (i
= 0; i
< count1
; i
++)
8125 /* Two symbols must have the same binding, type and name. */
8126 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
8127 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
8128 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8146 /* Return TRUE if 2 section types are compatible. */
8149 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
8150 bfd
*bbfd
, const asection
*bsec
)
8154 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
8155 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8158 return elf_section_type (asec
) == elf_section_type (bsec
);
8161 /* Final phase of ELF linker. */
8163 /* A structure we use to avoid passing large numbers of arguments. */
8165 struct elf_final_link_info
8167 /* General link information. */
8168 struct bfd_link_info
*info
;
8171 /* Symbol string table. */
8172 struct elf_strtab_hash
*symstrtab
;
8173 /* .hash section. */
8175 /* symbol version section (.gnu.version). */
8176 asection
*symver_sec
;
8177 /* Buffer large enough to hold contents of any section. */
8179 /* Buffer large enough to hold external relocs of any section. */
8180 void *external_relocs
;
8181 /* Buffer large enough to hold internal relocs of any section. */
8182 Elf_Internal_Rela
*internal_relocs
;
8183 /* Buffer large enough to hold external local symbols of any input
8185 bfd_byte
*external_syms
;
8186 /* And a buffer for symbol section indices. */
8187 Elf_External_Sym_Shndx
*locsym_shndx
;
8188 /* Buffer large enough to hold internal local symbols of any input
8190 Elf_Internal_Sym
*internal_syms
;
8191 /* Array large enough to hold a symbol index for each local symbol
8192 of any input BFD. */
8194 /* Array large enough to hold a section pointer for each local
8195 symbol of any input BFD. */
8196 asection
**sections
;
8197 /* Buffer for SHT_SYMTAB_SHNDX section. */
8198 Elf_External_Sym_Shndx
*symshndxbuf
;
8199 /* Number of STT_FILE syms seen. */
8200 size_t filesym_count
;
8203 /* This struct is used to pass information to elf_link_output_extsym. */
8205 struct elf_outext_info
8208 bfd_boolean localsyms
;
8209 bfd_boolean file_sym_done
;
8210 struct elf_final_link_info
*flinfo
;
8214 /* Support for evaluating a complex relocation.
8216 Complex relocations are generalized, self-describing relocations. The
8217 implementation of them consists of two parts: complex symbols, and the
8218 relocations themselves.
8220 The relocations are use a reserved elf-wide relocation type code (R_RELC
8221 external / BFD_RELOC_RELC internal) and an encoding of relocation field
8222 information (start bit, end bit, word width, etc) into the addend. This
8223 information is extracted from CGEN-generated operand tables within gas.
8225 Complex symbols are mangled symbols (BSF_RELC external / STT_RELC
8226 internal) representing prefix-notation expressions, including but not
8227 limited to those sorts of expressions normally encoded as addends in the
8228 addend field. The symbol mangling format is:
8231 | <unary-operator> ':' <node>
8232 | <binary-operator> ':' <node> ':' <node>
8235 <literal> := 's' <digits=N> ':' <N character symbol name>
8236 | 'S' <digits=N> ':' <N character section name>
8240 <binary-operator> := as in C
8241 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
8244 set_symbol_value (bfd
*bfd_with_globals
,
8245 Elf_Internal_Sym
*isymbuf
,
8250 struct elf_link_hash_entry
**sym_hashes
;
8251 struct elf_link_hash_entry
*h
;
8252 size_t extsymoff
= locsymcount
;
8254 if (symidx
< locsymcount
)
8256 Elf_Internal_Sym
*sym
;
8258 sym
= isymbuf
+ symidx
;
8259 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
8261 /* It is a local symbol: move it to the
8262 "absolute" section and give it a value. */
8263 sym
->st_shndx
= SHN_ABS
;
8264 sym
->st_value
= val
;
8267 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
8271 /* It is a global symbol: set its link type
8272 to "defined" and give it a value. */
8274 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
8275 h
= sym_hashes
[symidx
- extsymoff
];
8276 while (h
->root
.type
== bfd_link_hash_indirect
8277 || h
->root
.type
== bfd_link_hash_warning
)
8278 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8279 h
->root
.type
= bfd_link_hash_defined
;
8280 h
->root
.u
.def
.value
= val
;
8281 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
8285 resolve_symbol (const char *name
,
8287 struct elf_final_link_info
*flinfo
,
8289 Elf_Internal_Sym
*isymbuf
,
8292 Elf_Internal_Sym
*sym
;
8293 struct bfd_link_hash_entry
*global_entry
;
8294 const char *candidate
= NULL
;
8295 Elf_Internal_Shdr
*symtab_hdr
;
8298 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
8300 for (i
= 0; i
< locsymcount
; ++ i
)
8304 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
8307 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
8308 symtab_hdr
->sh_link
,
8311 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
8312 name
, candidate
, (unsigned long) sym
->st_value
);
8314 if (candidate
&& strcmp (candidate
, name
) == 0)
8316 asection
*sec
= flinfo
->sections
[i
];
8318 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
8319 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
8321 printf ("Found symbol with value %8.8lx\n",
8322 (unsigned long) *result
);
8328 /* Hmm, haven't found it yet. perhaps it is a global. */
8329 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
8330 FALSE
, FALSE
, TRUE
);
8334 if (global_entry
->type
== bfd_link_hash_defined
8335 || global_entry
->type
== bfd_link_hash_defweak
)
8337 *result
= (global_entry
->u
.def
.value
8338 + global_entry
->u
.def
.section
->output_section
->vma
8339 + global_entry
->u
.def
.section
->output_offset
);
8341 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
8342 global_entry
->root
.string
, (unsigned long) *result
);
8350 /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in
8351 bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section
8352 names like "foo.end" which is the end address of section "foo". */
8355 resolve_section (const char *name
,
8363 for (curr
= sections
; curr
; curr
= curr
->next
)
8364 if (strcmp (curr
->name
, name
) == 0)
8366 *result
= curr
->vma
;
8370 /* Hmm. still haven't found it. try pseudo-section names. */
8371 /* FIXME: This could be coded more efficiently... */
8372 for (curr
= sections
; curr
; curr
= curr
->next
)
8374 len
= strlen (curr
->name
);
8375 if (len
> strlen (name
))
8378 if (strncmp (curr
->name
, name
, len
) == 0)
8380 if (strncmp (".end", name
+ len
, 4) == 0)
8382 *result
= curr
->vma
+ curr
->size
/ bfd_octets_per_byte (abfd
);
8386 /* Insert more pseudo-section names here, if you like. */
8394 undefined_reference (const char *reftype
, const char *name
)
8396 /* xgettext:c-format */
8397 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
8402 eval_symbol (bfd_vma
*result
,
8405 struct elf_final_link_info
*flinfo
,
8407 Elf_Internal_Sym
*isymbuf
,
8416 const char *sym
= *symp
;
8418 bfd_boolean symbol_is_section
= FALSE
;
8423 if (len
< 1 || len
> sizeof (symbuf
))
8425 bfd_set_error (bfd_error_invalid_operation
);
8438 *result
= strtoul (sym
, (char **) symp
, 16);
8442 symbol_is_section
= TRUE
;
8446 symlen
= strtol (sym
, (char **) symp
, 10);
8447 sym
= *symp
+ 1; /* Skip the trailing ':'. */
8449 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
8451 bfd_set_error (bfd_error_invalid_operation
);
8455 memcpy (symbuf
, sym
, symlen
);
8456 symbuf
[symlen
] = '\0';
8457 *symp
= sym
+ symlen
;
8459 /* Is it always possible, with complex symbols, that gas "mis-guessed"
8460 the symbol as a section, or vice-versa. so we're pretty liberal in our
8461 interpretation here; section means "try section first", not "must be a
8462 section", and likewise with symbol. */
8464 if (symbol_is_section
)
8466 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
, input_bfd
)
8467 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
8468 isymbuf
, locsymcount
))
8470 undefined_reference ("section", symbuf
);
8476 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
8477 isymbuf
, locsymcount
)
8478 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
8481 undefined_reference ("symbol", symbuf
);
8488 /* All that remains are operators. */
8490 #define UNARY_OP(op) \
8491 if (strncmp (sym, #op, strlen (#op)) == 0) \
8493 sym += strlen (#op); \
8497 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
8498 isymbuf, locsymcount, signed_p)) \
8501 *result = op ((bfd_signed_vma) a); \
8507 #define BINARY_OP(op) \
8508 if (strncmp (sym, #op, strlen (#op)) == 0) \
8510 sym += strlen (#op); \
8514 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
8515 isymbuf, locsymcount, signed_p)) \
8518 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
8519 isymbuf, locsymcount, signed_p)) \
8522 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
8552 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
8553 bfd_set_error (bfd_error_invalid_operation
);
8559 put_value (bfd_vma size
,
8560 unsigned long chunksz
,
8565 location
+= (size
- chunksz
);
8567 for (; size
; size
-= chunksz
, location
-= chunksz
)
8572 bfd_put_8 (input_bfd
, x
, location
);
8576 bfd_put_16 (input_bfd
, x
, location
);
8580 bfd_put_32 (input_bfd
, x
, location
);
8581 /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */
8587 bfd_put_64 (input_bfd
, x
, location
);
8588 /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */
8601 get_value (bfd_vma size
,
8602 unsigned long chunksz
,
8609 /* Sanity checks. */
8610 BFD_ASSERT (chunksz
<= sizeof (x
)
8613 && (size
% chunksz
) == 0
8614 && input_bfd
!= NULL
8615 && location
!= NULL
);
8617 if (chunksz
== sizeof (x
))
8619 BFD_ASSERT (size
== chunksz
);
8621 /* Make sure that we do not perform an undefined shift operation.
8622 We know that size == chunksz so there will only be one iteration
8623 of the loop below. */
8627 shift
= 8 * chunksz
;
8629 for (; size
; size
-= chunksz
, location
+= chunksz
)
8634 x
= (x
<< shift
) | bfd_get_8 (input_bfd
, location
);
8637 x
= (x
<< shift
) | bfd_get_16 (input_bfd
, location
);
8640 x
= (x
<< shift
) | bfd_get_32 (input_bfd
, location
);
8644 x
= (x
<< shift
) | bfd_get_64 (input_bfd
, location
);
8655 decode_complex_addend (unsigned long *start
, /* in bits */
8656 unsigned long *oplen
, /* in bits */
8657 unsigned long *len
, /* in bits */
8658 unsigned long *wordsz
, /* in bytes */
8659 unsigned long *chunksz
, /* in bytes */
8660 unsigned long *lsb0_p
,
8661 unsigned long *signed_p
,
8662 unsigned long *trunc_p
,
8663 unsigned long encoded
)
8665 * start
= encoded
& 0x3F;
8666 * len
= (encoded
>> 6) & 0x3F;
8667 * oplen
= (encoded
>> 12) & 0x3F;
8668 * wordsz
= (encoded
>> 18) & 0xF;
8669 * chunksz
= (encoded
>> 22) & 0xF;
8670 * lsb0_p
= (encoded
>> 27) & 1;
8671 * signed_p
= (encoded
>> 28) & 1;
8672 * trunc_p
= (encoded
>> 29) & 1;
8675 bfd_reloc_status_type
8676 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
8677 asection
*input_section ATTRIBUTE_UNUSED
,
8679 Elf_Internal_Rela
*rel
,
8682 bfd_vma shift
, x
, mask
;
8683 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
8684 bfd_reloc_status_type r
;
8686 /* Perform this reloc, since it is complex.
8687 (this is not to say that it necessarily refers to a complex
8688 symbol; merely that it is a self-describing CGEN based reloc.
8689 i.e. the addend has the complete reloc information (bit start, end,
8690 word size, etc) encoded within it.). */
8692 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
8693 &chunksz
, &lsb0_p
, &signed_p
,
8694 &trunc_p
, rel
->r_addend
);
8696 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
8699 shift
= (start
+ 1) - len
;
8701 shift
= (8 * wordsz
) - (start
+ len
);
8703 x
= get_value (wordsz
, chunksz
, input_bfd
,
8704 contents
+ rel
->r_offset
* bfd_octets_per_byte (input_bfd
));
8707 printf ("Doing complex reloc: "
8708 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
8709 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
8710 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
8711 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
8712 oplen
, (unsigned long) x
, (unsigned long) mask
,
8713 (unsigned long) relocation
);
8718 /* Now do an overflow check. */
8719 r
= bfd_check_overflow ((signed_p
8720 ? complain_overflow_signed
8721 : complain_overflow_unsigned
),
8722 len
, 0, (8 * wordsz
),
8726 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
8729 printf (" relocation: %8.8lx\n"
8730 " shifted mask: %8.8lx\n"
8731 " shifted/masked reloc: %8.8lx\n"
8732 " result: %8.8lx\n",
8733 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
8734 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
8736 put_value (wordsz
, chunksz
, input_bfd
, x
,
8737 contents
+ rel
->r_offset
* bfd_octets_per_byte (input_bfd
));
8741 /* Functions to read r_offset from external (target order) reloc
8742 entry. Faster than bfd_getl32 et al, because we let the compiler
8743 know the value is aligned. */
8746 ext32l_r_offset (const void *p
)
8753 const union aligned32
*a
8754 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
8756 uint32_t aval
= ( (uint32_t) a
->c
[0]
8757 | (uint32_t) a
->c
[1] << 8
8758 | (uint32_t) a
->c
[2] << 16
8759 | (uint32_t) a
->c
[3] << 24);
8764 ext32b_r_offset (const void *p
)
8771 const union aligned32
*a
8772 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
8774 uint32_t aval
= ( (uint32_t) a
->c
[0] << 24
8775 | (uint32_t) a
->c
[1] << 16
8776 | (uint32_t) a
->c
[2] << 8
8777 | (uint32_t) a
->c
[3]);
8781 #ifdef BFD_HOST_64_BIT
8783 ext64l_r_offset (const void *p
)
8790 const union aligned64
*a
8791 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
8793 uint64_t aval
= ( (uint64_t) a
->c
[0]
8794 | (uint64_t) a
->c
[1] << 8
8795 | (uint64_t) a
->c
[2] << 16
8796 | (uint64_t) a
->c
[3] << 24
8797 | (uint64_t) a
->c
[4] << 32
8798 | (uint64_t) a
->c
[5] << 40
8799 | (uint64_t) a
->c
[6] << 48
8800 | (uint64_t) a
->c
[7] << 56);
8805 ext64b_r_offset (const void *p
)
8812 const union aligned64
*a
8813 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
8815 uint64_t aval
= ( (uint64_t) a
->c
[0] << 56
8816 | (uint64_t) a
->c
[1] << 48
8817 | (uint64_t) a
->c
[2] << 40
8818 | (uint64_t) a
->c
[3] << 32
8819 | (uint64_t) a
->c
[4] << 24
8820 | (uint64_t) a
->c
[5] << 16
8821 | (uint64_t) a
->c
[6] << 8
8822 | (uint64_t) a
->c
[7]);
8827 /* When performing a relocatable link, the input relocations are
8828 preserved. But, if they reference global symbols, the indices
8829 referenced must be updated. Update all the relocations found in
8833 elf_link_adjust_relocs (bfd
*abfd
,
8835 struct bfd_elf_section_reloc_data
*reldata
,
8837 struct bfd_link_info
*info
)
8840 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8842 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8843 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8844 bfd_vma r_type_mask
;
8846 unsigned int count
= reldata
->count
;
8847 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
8849 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
8851 swap_in
= bed
->s
->swap_reloc_in
;
8852 swap_out
= bed
->s
->swap_reloc_out
;
8854 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
8856 swap_in
= bed
->s
->swap_reloca_in
;
8857 swap_out
= bed
->s
->swap_reloca_out
;
8862 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
8865 if (bed
->s
->arch_size
== 32)
8872 r_type_mask
= 0xffffffff;
8876 erela
= reldata
->hdr
->contents
;
8877 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
8879 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
8882 if (*rel_hash
== NULL
)
8885 if ((*rel_hash
)->indx
== -2
8886 && info
->gc_sections
8887 && ! info
->gc_keep_exported
)
8889 /* PR 21524: Let the user know if a symbol was removed by garbage collection. */
8890 _bfd_error_handler (_("%pB:%pA: error: relocation references symbol %s which was removed by garbage collection"),
8892 (*rel_hash
)->root
.root
.string
);
8893 _bfd_error_handler (_("%pB:%pA: error: try relinking with --gc-keep-exported enabled"),
8895 bfd_set_error (bfd_error_invalid_operation
);
8898 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
8900 (*swap_in
) (abfd
, erela
, irela
);
8901 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
8902 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
8903 | (irela
[j
].r_info
& r_type_mask
));
8904 (*swap_out
) (abfd
, irela
, erela
);
8907 if (bed
->elf_backend_update_relocs
)
8908 (*bed
->elf_backend_update_relocs
) (sec
, reldata
);
8910 if (sort
&& count
!= 0)
8912 bfd_vma (*ext_r_off
) (const void *);
8915 bfd_byte
*base
, *end
, *p
, *loc
;
8916 bfd_byte
*buf
= NULL
;
8918 if (bed
->s
->arch_size
== 32)
8920 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
8921 ext_r_off
= ext32l_r_offset
;
8922 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
8923 ext_r_off
= ext32b_r_offset
;
8929 #ifdef BFD_HOST_64_BIT
8930 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
8931 ext_r_off
= ext64l_r_offset
;
8932 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
8933 ext_r_off
= ext64b_r_offset
;
8939 /* Must use a stable sort here. A modified insertion sort,
8940 since the relocs are mostly sorted already. */
8941 elt_size
= reldata
->hdr
->sh_entsize
;
8942 base
= reldata
->hdr
->contents
;
8943 end
= base
+ count
* elt_size
;
8944 if (elt_size
> sizeof (Elf64_External_Rela
))
8947 /* Ensure the first element is lowest. This acts as a sentinel,
8948 speeding the main loop below. */
8949 r_off
= (*ext_r_off
) (base
);
8950 for (p
= loc
= base
; (p
+= elt_size
) < end
; )
8952 bfd_vma r_off2
= (*ext_r_off
) (p
);
8961 /* Don't just swap *base and *loc as that changes the order
8962 of the original base[0] and base[1] if they happen to
8963 have the same r_offset. */
8964 bfd_byte onebuf
[sizeof (Elf64_External_Rela
)];
8965 memcpy (onebuf
, loc
, elt_size
);
8966 memmove (base
+ elt_size
, base
, loc
- base
);
8967 memcpy (base
, onebuf
, elt_size
);
8970 for (p
= base
+ elt_size
; (p
+= elt_size
) < end
; )
8972 /* base to p is sorted, *p is next to insert. */
8973 r_off
= (*ext_r_off
) (p
);
8974 /* Search the sorted region for location to insert. */
8976 while (r_off
< (*ext_r_off
) (loc
))
8981 /* Chances are there is a run of relocs to insert here,
8982 from one of more input files. Files are not always
8983 linked in order due to the way elf_link_input_bfd is
8984 called. See pr17666. */
8985 size_t sortlen
= p
- loc
;
8986 bfd_vma r_off2
= (*ext_r_off
) (loc
);
8987 size_t runlen
= elt_size
;
8988 size_t buf_size
= 96 * 1024;
8989 while (p
+ runlen
< end
8990 && (sortlen
<= buf_size
8991 || runlen
+ elt_size
<= buf_size
)
8992 && r_off2
> (*ext_r_off
) (p
+ runlen
))
8996 buf
= bfd_malloc (buf_size
);
9000 if (runlen
< sortlen
)
9002 memcpy (buf
, p
, runlen
);
9003 memmove (loc
+ runlen
, loc
, sortlen
);
9004 memcpy (loc
, buf
, runlen
);
9008 memcpy (buf
, loc
, sortlen
);
9009 memmove (loc
, p
, runlen
);
9010 memcpy (loc
+ runlen
, buf
, sortlen
);
9012 p
+= runlen
- elt_size
;
9015 /* Hashes are no longer valid. */
9016 free (reldata
->hashes
);
9017 reldata
->hashes
= NULL
;
9023 struct elf_link_sort_rela
9029 enum elf_reloc_type_class type
;
9030 /* We use this as an array of size int_rels_per_ext_rel. */
9031 Elf_Internal_Rela rela
[1];
9035 elf_link_sort_cmp1 (const void *A
, const void *B
)
9037 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
9038 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
9039 int relativea
, relativeb
;
9041 relativea
= a
->type
== reloc_class_relative
;
9042 relativeb
= b
->type
== reloc_class_relative
;
9044 if (relativea
< relativeb
)
9046 if (relativea
> relativeb
)
9048 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
9050 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
9052 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
9054 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
9060 elf_link_sort_cmp2 (const void *A
, const void *B
)
9062 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
9063 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
9065 if (a
->type
< b
->type
)
9067 if (a
->type
> b
->type
)
9069 if (a
->u
.offset
< b
->u
.offset
)
9071 if (a
->u
.offset
> b
->u
.offset
)
9073 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
9075 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
9081 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
9083 asection
*dynamic_relocs
;
9086 bfd_size_type count
, size
;
9087 size_t i
, ret
, sort_elt
, ext_size
;
9088 bfd_byte
*sort
, *s_non_relative
, *p
;
9089 struct elf_link_sort_rela
*sq
;
9090 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
9091 int i2e
= bed
->s
->int_rels_per_ext_rel
;
9092 unsigned int opb
= bfd_octets_per_byte (abfd
);
9093 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
9094 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
9095 struct bfd_link_order
*lo
;
9097 bfd_boolean use_rela
;
9099 /* Find a dynamic reloc section. */
9100 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
9101 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
9102 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
9103 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
9105 bfd_boolean use_rela_initialised
= FALSE
;
9107 /* This is just here to stop gcc from complaining.
9108 Its initialization checking code is not perfect. */
9111 /* Both sections are present. Examine the sizes
9112 of the indirect sections to help us choose. */
9113 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9114 if (lo
->type
== bfd_indirect_link_order
)
9116 asection
*o
= lo
->u
.indirect
.section
;
9118 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
9120 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9121 /* Section size is divisible by both rel and rela sizes.
9122 It is of no help to us. */
9126 /* Section size is only divisible by rela. */
9127 if (use_rela_initialised
&& !use_rela
)
9129 _bfd_error_handler (_("%pB: unable to sort relocs - "
9130 "they are in more than one size"),
9132 bfd_set_error (bfd_error_invalid_operation
);
9138 use_rela_initialised
= TRUE
;
9142 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9144 /* Section size is only divisible by rel. */
9145 if (use_rela_initialised
&& use_rela
)
9147 _bfd_error_handler (_("%pB: unable to sort relocs - "
9148 "they are in more than one size"),
9150 bfd_set_error (bfd_error_invalid_operation
);
9156 use_rela_initialised
= TRUE
;
9161 /* The section size is not divisible by either -
9162 something is wrong. */
9163 _bfd_error_handler (_("%pB: unable to sort relocs - "
9164 "they are of an unknown size"), abfd
);
9165 bfd_set_error (bfd_error_invalid_operation
);
9170 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9171 if (lo
->type
== bfd_indirect_link_order
)
9173 asection
*o
= lo
->u
.indirect
.section
;
9175 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
9177 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9178 /* Section size is divisible by both rel and rela sizes.
9179 It is of no help to us. */
9183 /* Section size is only divisible by rela. */
9184 if (use_rela_initialised
&& !use_rela
)
9186 _bfd_error_handler (_("%pB: unable to sort relocs - "
9187 "they are in more than one size"),
9189 bfd_set_error (bfd_error_invalid_operation
);
9195 use_rela_initialised
= TRUE
;
9199 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9201 /* Section size is only divisible by rel. */
9202 if (use_rela_initialised
&& use_rela
)
9204 _bfd_error_handler (_("%pB: unable to sort relocs - "
9205 "they are in more than one size"),
9207 bfd_set_error (bfd_error_invalid_operation
);
9213 use_rela_initialised
= TRUE
;
9218 /* The section size is not divisible by either -
9219 something is wrong. */
9220 _bfd_error_handler (_("%pB: unable to sort relocs - "
9221 "they are of an unknown size"), abfd
);
9222 bfd_set_error (bfd_error_invalid_operation
);
9227 if (! use_rela_initialised
)
9231 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
9233 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
9240 dynamic_relocs
= rela_dyn
;
9241 ext_size
= bed
->s
->sizeof_rela
;
9242 swap_in
= bed
->s
->swap_reloca_in
;
9243 swap_out
= bed
->s
->swap_reloca_out
;
9247 dynamic_relocs
= rel_dyn
;
9248 ext_size
= bed
->s
->sizeof_rel
;
9249 swap_in
= bed
->s
->swap_reloc_in
;
9250 swap_out
= bed
->s
->swap_reloc_out
;
9254 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9255 if (lo
->type
== bfd_indirect_link_order
)
9256 size
+= lo
->u
.indirect
.section
->size
;
9258 if (size
!= dynamic_relocs
->size
)
9261 sort_elt
= (sizeof (struct elf_link_sort_rela
)
9262 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
9264 count
= dynamic_relocs
->size
/ ext_size
;
9267 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
9271 (*info
->callbacks
->warning
)
9272 (info
, _("not enough memory to sort relocations"), 0, abfd
, 0, 0);
9276 if (bed
->s
->arch_size
== 32)
9277 r_sym_mask
= ~(bfd_vma
) 0xff;
9279 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
9281 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9282 if (lo
->type
== bfd_indirect_link_order
)
9284 bfd_byte
*erel
, *erelend
;
9285 asection
*o
= lo
->u
.indirect
.section
;
9287 if (o
->contents
== NULL
&& o
->size
!= 0)
9289 /* This is a reloc section that is being handled as a normal
9290 section. See bfd_section_from_shdr. We can't combine
9291 relocs in this case. */
9296 erelend
= o
->contents
+ o
->size
;
9297 p
= sort
+ o
->output_offset
* opb
/ ext_size
* sort_elt
;
9299 while (erel
< erelend
)
9301 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9303 (*swap_in
) (abfd
, erel
, s
->rela
);
9304 s
->type
= (*bed
->elf_backend_reloc_type_class
) (info
, o
, s
->rela
);
9305 s
->u
.sym_mask
= r_sym_mask
;
9311 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
9313 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
9315 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9316 if (s
->type
!= reloc_class_relative
)
9322 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
9323 for (; i
< count
; i
++, p
+= sort_elt
)
9325 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
9326 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
9328 sp
->u
.offset
= sq
->rela
->r_offset
;
9331 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
9333 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
9334 if (htab
->srelplt
&& htab
->srelplt
->output_section
== dynamic_relocs
)
9336 /* We have plt relocs in .rela.dyn. */
9337 sq
= (struct elf_link_sort_rela
*) sort
;
9338 for (i
= 0; i
< count
; i
++)
9339 if (sq
[count
- i
- 1].type
!= reloc_class_plt
)
9341 if (i
!= 0 && htab
->srelplt
->size
== i
* ext_size
)
9343 struct bfd_link_order
**plo
;
9344 /* Put srelplt link_order last. This is so the output_offset
9345 set in the next loop is correct for DT_JMPREL. */
9346 for (plo
= &dynamic_relocs
->map_head
.link_order
; *plo
!= NULL
; )
9347 if ((*plo
)->type
== bfd_indirect_link_order
9348 && (*plo
)->u
.indirect
.section
== htab
->srelplt
)
9354 plo
= &(*plo
)->next
;
9357 dynamic_relocs
->map_tail
.link_order
= lo
;
9362 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9363 if (lo
->type
== bfd_indirect_link_order
)
9365 bfd_byte
*erel
, *erelend
;
9366 asection
*o
= lo
->u
.indirect
.section
;
9369 erelend
= o
->contents
+ o
->size
;
9370 o
->output_offset
= (p
- sort
) / sort_elt
* ext_size
/ opb
;
9371 while (erel
< erelend
)
9373 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9374 (*swap_out
) (abfd
, s
->rela
, erel
);
9381 *psec
= dynamic_relocs
;
9385 /* Add a symbol to the output symbol string table. */
9388 elf_link_output_symstrtab (struct elf_final_link_info
*flinfo
,
9390 Elf_Internal_Sym
*elfsym
,
9391 asection
*input_sec
,
9392 struct elf_link_hash_entry
*h
)
9394 int (*output_symbol_hook
)
9395 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
9396 struct elf_link_hash_entry
*);
9397 struct elf_link_hash_table
*hash_table
;
9398 const struct elf_backend_data
*bed
;
9399 bfd_size_type strtabsize
;
9401 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
9403 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9404 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
9405 if (output_symbol_hook
!= NULL
)
9407 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
9412 if (ELF_ST_TYPE (elfsym
->st_info
) == STT_GNU_IFUNC
)
9413 elf_tdata (flinfo
->output_bfd
)->has_gnu_osabi
|= elf_gnu_osabi_ifunc
;
9414 if (ELF_ST_BIND (elfsym
->st_info
) == STB_GNU_UNIQUE
)
9415 elf_tdata (flinfo
->output_bfd
)->has_gnu_osabi
|= elf_gnu_osabi_unique
;
9419 || (input_sec
->flags
& SEC_EXCLUDE
))
9420 elfsym
->st_name
= (unsigned long) -1;
9423 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
9424 to get the final offset for st_name. */
9426 = (unsigned long) _bfd_elf_strtab_add (flinfo
->symstrtab
,
9428 if (elfsym
->st_name
== (unsigned long) -1)
9432 hash_table
= elf_hash_table (flinfo
->info
);
9433 strtabsize
= hash_table
->strtabsize
;
9434 if (strtabsize
<= hash_table
->strtabcount
)
9436 strtabsize
+= strtabsize
;
9437 hash_table
->strtabsize
= strtabsize
;
9438 strtabsize
*= sizeof (*hash_table
->strtab
);
9440 = (struct elf_sym_strtab
*) bfd_realloc (hash_table
->strtab
,
9442 if (hash_table
->strtab
== NULL
)
9445 hash_table
->strtab
[hash_table
->strtabcount
].sym
= *elfsym
;
9446 hash_table
->strtab
[hash_table
->strtabcount
].dest_index
9447 = hash_table
->strtabcount
;
9448 hash_table
->strtab
[hash_table
->strtabcount
].destshndx_index
9449 = flinfo
->symshndxbuf
? bfd_get_symcount (flinfo
->output_bfd
) : 0;
9451 bfd_get_symcount (flinfo
->output_bfd
) += 1;
9452 hash_table
->strtabcount
+= 1;
9457 /* Swap symbols out to the symbol table and flush the output symbols to
9461 elf_link_swap_symbols_out (struct elf_final_link_info
*flinfo
)
9463 struct elf_link_hash_table
*hash_table
= elf_hash_table (flinfo
->info
);
9466 const struct elf_backend_data
*bed
;
9468 Elf_Internal_Shdr
*hdr
;
9472 if (!hash_table
->strtabcount
)
9475 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
9477 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9479 amt
= bed
->s
->sizeof_sym
* hash_table
->strtabcount
;
9480 symbuf
= (bfd_byte
*) bfd_malloc (amt
);
9484 if (flinfo
->symshndxbuf
)
9486 amt
= sizeof (Elf_External_Sym_Shndx
);
9487 amt
*= bfd_get_symcount (flinfo
->output_bfd
);
9488 flinfo
->symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
9489 if (flinfo
->symshndxbuf
== NULL
)
9496 for (i
= 0; i
< hash_table
->strtabcount
; i
++)
9498 struct elf_sym_strtab
*elfsym
= &hash_table
->strtab
[i
];
9499 if (elfsym
->sym
.st_name
== (unsigned long) -1)
9500 elfsym
->sym
.st_name
= 0;
9503 = (unsigned long) _bfd_elf_strtab_offset (flinfo
->symstrtab
,
9504 elfsym
->sym
.st_name
);
9505 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &elfsym
->sym
,
9506 ((bfd_byte
*) symbuf
9507 + (elfsym
->dest_index
9508 * bed
->s
->sizeof_sym
)),
9509 (flinfo
->symshndxbuf
9510 + elfsym
->destshndx_index
));
9513 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
9514 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
9515 amt
= hash_table
->strtabcount
* bed
->s
->sizeof_sym
;
9516 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) == 0
9517 && bfd_bwrite (symbuf
, amt
, flinfo
->output_bfd
) == amt
)
9519 hdr
->sh_size
+= amt
;
9527 free (hash_table
->strtab
);
9528 hash_table
->strtab
= NULL
;
9533 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
9536 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
9538 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
9539 && sym
->st_shndx
< SHN_LORESERVE
)
9541 /* The gABI doesn't support dynamic symbols in output sections
9544 /* xgettext:c-format */
9545 (_("%pB: too many sections: %d (>= %d)"),
9546 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
9547 bfd_set_error (bfd_error_nonrepresentable_section
);
9553 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
9554 allowing an unsatisfied unversioned symbol in the DSO to match a
9555 versioned symbol that would normally require an explicit version.
9556 We also handle the case that a DSO references a hidden symbol
9557 which may be satisfied by a versioned symbol in another DSO. */
9560 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
9561 const struct elf_backend_data
*bed
,
9562 struct elf_link_hash_entry
*h
)
9565 struct elf_link_loaded_list
*loaded
;
9567 if (!is_elf_hash_table (info
->hash
))
9570 /* Check indirect symbol. */
9571 while (h
->root
.type
== bfd_link_hash_indirect
)
9572 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9574 switch (h
->root
.type
)
9580 case bfd_link_hash_undefined
:
9581 case bfd_link_hash_undefweak
:
9582 abfd
= h
->root
.u
.undef
.abfd
;
9584 || (abfd
->flags
& DYNAMIC
) == 0
9585 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
9589 case bfd_link_hash_defined
:
9590 case bfd_link_hash_defweak
:
9591 abfd
= h
->root
.u
.def
.section
->owner
;
9594 case bfd_link_hash_common
:
9595 abfd
= h
->root
.u
.c
.p
->section
->owner
;
9598 BFD_ASSERT (abfd
!= NULL
);
9600 for (loaded
= elf_hash_table (info
)->loaded
;
9602 loaded
= loaded
->next
)
9605 Elf_Internal_Shdr
*hdr
;
9609 Elf_Internal_Shdr
*versymhdr
;
9610 Elf_Internal_Sym
*isym
;
9611 Elf_Internal_Sym
*isymend
;
9612 Elf_Internal_Sym
*isymbuf
;
9613 Elf_External_Versym
*ever
;
9614 Elf_External_Versym
*extversym
;
9616 input
= loaded
->abfd
;
9618 /* We check each DSO for a possible hidden versioned definition. */
9620 || (input
->flags
& DYNAMIC
) == 0
9621 || elf_dynversym (input
) == 0)
9624 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
9626 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9627 if (elf_bad_symtab (input
))
9629 extsymcount
= symcount
;
9634 extsymcount
= symcount
- hdr
->sh_info
;
9635 extsymoff
= hdr
->sh_info
;
9638 if (extsymcount
== 0)
9641 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
9643 if (isymbuf
== NULL
)
9646 /* Read in any version definitions. */
9647 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
9648 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
9649 if (extversym
== NULL
)
9652 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
9653 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
9654 != versymhdr
->sh_size
))
9662 ever
= extversym
+ extsymoff
;
9663 isymend
= isymbuf
+ extsymcount
;
9664 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
9667 Elf_Internal_Versym iver
;
9668 unsigned short version_index
;
9670 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
9671 || isym
->st_shndx
== SHN_UNDEF
)
9674 name
= bfd_elf_string_from_elf_section (input
,
9677 if (strcmp (name
, h
->root
.root
.string
) != 0)
9680 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
9682 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
9684 && h
->forced_local
))
9686 /* If we have a non-hidden versioned sym, then it should
9687 have provided a definition for the undefined sym unless
9688 it is defined in a non-shared object and forced local.
9693 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
9694 if (version_index
== 1 || version_index
== 2)
9696 /* This is the base or first version. We can use it. */
9710 /* Convert ELF common symbol TYPE. */
9713 elf_link_convert_common_type (struct bfd_link_info
*info
, int type
)
9715 /* Commom symbol can only appear in relocatable link. */
9716 if (!bfd_link_relocatable (info
))
9718 switch (info
->elf_stt_common
)
9722 case elf_stt_common
:
9725 case no_elf_stt_common
:
9732 /* Add an external symbol to the symbol table. This is called from
9733 the hash table traversal routine. When generating a shared object,
9734 we go through the symbol table twice. The first time we output
9735 anything that might have been forced to local scope in a version
9736 script. The second time we output the symbols that are still
9740 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
9742 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
9743 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
9744 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
9746 Elf_Internal_Sym sym
;
9747 asection
*input_sec
;
9748 const struct elf_backend_data
*bed
;
9753 if (h
->root
.type
== bfd_link_hash_warning
)
9755 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9756 if (h
->root
.type
== bfd_link_hash_new
)
9760 /* Decide whether to output this symbol in this pass. */
9761 if (eoinfo
->localsyms
)
9763 if (!h
->forced_local
)
9768 if (h
->forced_local
)
9772 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9774 if (h
->root
.type
== bfd_link_hash_undefined
)
9776 /* If we have an undefined symbol reference here then it must have
9777 come from a shared library that is being linked in. (Undefined
9778 references in regular files have already been handled unless
9779 they are in unreferenced sections which are removed by garbage
9781 bfd_boolean ignore_undef
= FALSE
;
9783 /* Some symbols may be special in that the fact that they're
9784 undefined can be safely ignored - let backend determine that. */
9785 if (bed
->elf_backend_ignore_undef_symbol
)
9786 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
9788 /* If we are reporting errors for this situation then do so now. */
9790 && h
->ref_dynamic_nonweak
9791 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
9792 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
9793 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
9794 (*flinfo
->info
->callbacks
->undefined_symbol
)
9795 (flinfo
->info
, h
->root
.root
.string
,
9796 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
,
9798 flinfo
->info
->unresolved_syms_in_shared_libs
== RM_GENERATE_ERROR
);
9800 /* Strip a global symbol defined in a discarded section. */
9805 /* We should also warn if a forced local symbol is referenced from
9806 shared libraries. */
9807 if (bfd_link_executable (flinfo
->info
)
9812 && h
->ref_dynamic_nonweak
9813 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
9817 struct elf_link_hash_entry
*hi
= h
;
9819 /* Check indirect symbol. */
9820 while (hi
->root
.type
== bfd_link_hash_indirect
)
9821 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
9823 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
9824 /* xgettext:c-format */
9825 msg
= _("%pB: internal symbol `%s' in %pB is referenced by DSO");
9826 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
9827 /* xgettext:c-format */
9828 msg
= _("%pB: hidden symbol `%s' in %pB is referenced by DSO");
9830 /* xgettext:c-format */
9831 msg
= _("%pB: local symbol `%s' in %pB is referenced by DSO");
9832 def_bfd
= flinfo
->output_bfd
;
9833 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
9834 def_bfd
= hi
->root
.u
.def
.section
->owner
;
9835 _bfd_error_handler (msg
, flinfo
->output_bfd
,
9836 h
->root
.root
.string
, def_bfd
);
9837 bfd_set_error (bfd_error_bad_value
);
9838 eoinfo
->failed
= TRUE
;
9842 /* We don't want to output symbols that have never been mentioned by
9843 a regular file, or that we have been told to strip. However, if
9844 h->indx is set to -2, the symbol is used by a reloc and we must
9849 else if ((h
->def_dynamic
9851 || h
->root
.type
== bfd_link_hash_new
)
9855 else if (flinfo
->info
->strip
== strip_all
)
9857 else if (flinfo
->info
->strip
== strip_some
9858 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
9859 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
9861 else if ((h
->root
.type
== bfd_link_hash_defined
9862 || h
->root
.type
== bfd_link_hash_defweak
)
9863 && ((flinfo
->info
->strip_discarded
9864 && discarded_section (h
->root
.u
.def
.section
))
9865 || ((h
->root
.u
.def
.section
->flags
& SEC_LINKER_CREATED
) == 0
9866 && h
->root
.u
.def
.section
->owner
!= NULL
9867 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
9869 else if ((h
->root
.type
== bfd_link_hash_undefined
9870 || h
->root
.type
== bfd_link_hash_undefweak
)
9871 && h
->root
.u
.undef
.abfd
!= NULL
9872 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
9877 /* If we're stripping it, and it's not a dynamic symbol, there's
9878 nothing else to do. However, if it is a forced local symbol or
9879 an ifunc symbol we need to give the backend finish_dynamic_symbol
9880 function a chance to make it dynamic. */
9883 && type
!= STT_GNU_IFUNC
9884 && !h
->forced_local
)
9888 sym
.st_size
= h
->size
;
9889 sym
.st_other
= h
->other
;
9890 switch (h
->root
.type
)
9893 case bfd_link_hash_new
:
9894 case bfd_link_hash_warning
:
9898 case bfd_link_hash_undefined
:
9899 case bfd_link_hash_undefweak
:
9900 input_sec
= bfd_und_section_ptr
;
9901 sym
.st_shndx
= SHN_UNDEF
;
9904 case bfd_link_hash_defined
:
9905 case bfd_link_hash_defweak
:
9907 input_sec
= h
->root
.u
.def
.section
;
9908 if (input_sec
->output_section
!= NULL
)
9911 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
9912 input_sec
->output_section
);
9913 if (sym
.st_shndx
== SHN_BAD
)
9916 /* xgettext:c-format */
9917 (_("%pB: could not find output section %pA for input section %pA"),
9918 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
9919 bfd_set_error (bfd_error_nonrepresentable_section
);
9920 eoinfo
->failed
= TRUE
;
9924 /* ELF symbols in relocatable files are section relative,
9925 but in nonrelocatable files they are virtual
9927 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
9928 if (!bfd_link_relocatable (flinfo
->info
))
9930 sym
.st_value
+= input_sec
->output_section
->vma
;
9931 if (h
->type
== STT_TLS
)
9933 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
9934 if (tls_sec
!= NULL
)
9935 sym
.st_value
-= tls_sec
->vma
;
9941 BFD_ASSERT (input_sec
->owner
== NULL
9942 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
9943 sym
.st_shndx
= SHN_UNDEF
;
9944 input_sec
= bfd_und_section_ptr
;
9949 case bfd_link_hash_common
:
9950 input_sec
= h
->root
.u
.c
.p
->section
;
9951 sym
.st_shndx
= bed
->common_section_index (input_sec
);
9952 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
9955 case bfd_link_hash_indirect
:
9956 /* These symbols are created by symbol versioning. They point
9957 to the decorated version of the name. For example, if the
9958 symbol foo@@GNU_1.2 is the default, which should be used when
9959 foo is used with no version, then we add an indirect symbol
9960 foo which points to foo@@GNU_1.2. We ignore these symbols,
9961 since the indirected symbol is already in the hash table. */
9965 if (type
== STT_COMMON
|| type
== STT_OBJECT
)
9966 switch (h
->root
.type
)
9968 case bfd_link_hash_common
:
9969 type
= elf_link_convert_common_type (flinfo
->info
, type
);
9971 case bfd_link_hash_defined
:
9972 case bfd_link_hash_defweak
:
9973 if (bed
->common_definition (&sym
))
9974 type
= elf_link_convert_common_type (flinfo
->info
, type
);
9978 case bfd_link_hash_undefined
:
9979 case bfd_link_hash_undefweak
:
9985 if (h
->forced_local
)
9987 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, type
);
9988 /* Turn off visibility on local symbol. */
9989 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
9991 /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */
9992 else if (h
->unique_global
&& h
->def_regular
)
9993 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, type
);
9994 else if (h
->root
.type
== bfd_link_hash_undefweak
9995 || h
->root
.type
== bfd_link_hash_defweak
)
9996 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, type
);
9998 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
9999 sym
.st_target_internal
= h
->target_internal
;
10001 /* Give the processor backend a chance to tweak the symbol value,
10002 and also to finish up anything that needs to be done for this
10003 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
10004 forced local syms when non-shared is due to a historical quirk.
10005 STT_GNU_IFUNC symbol must go through PLT. */
10006 if ((h
->type
== STT_GNU_IFUNC
10008 && !bfd_link_relocatable (flinfo
->info
))
10009 || ((h
->dynindx
!= -1
10010 || h
->forced_local
)
10011 && ((bfd_link_pic (flinfo
->info
)
10012 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
10013 || h
->root
.type
!= bfd_link_hash_undefweak
))
10014 || !h
->forced_local
)
10015 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
10017 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
10018 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
10020 eoinfo
->failed
= TRUE
;
10025 /* If we are marking the symbol as undefined, and there are no
10026 non-weak references to this symbol from a regular object, then
10027 mark the symbol as weak undefined; if there are non-weak
10028 references, mark the symbol as strong. We can't do this earlier,
10029 because it might not be marked as undefined until the
10030 finish_dynamic_symbol routine gets through with it. */
10031 if (sym
.st_shndx
== SHN_UNDEF
10033 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
10034 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
10037 type
= ELF_ST_TYPE (sym
.st_info
);
10039 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
10040 if (type
== STT_GNU_IFUNC
)
10043 if (h
->ref_regular_nonweak
)
10044 bindtype
= STB_GLOBAL
;
10046 bindtype
= STB_WEAK
;
10047 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
10050 /* If this is a symbol defined in a dynamic library, don't use the
10051 symbol size from the dynamic library. Relinking an executable
10052 against a new library may introduce gratuitous changes in the
10053 executable's symbols if we keep the size. */
10054 if (sym
.st_shndx
== SHN_UNDEF
10059 /* If a non-weak symbol with non-default visibility is not defined
10060 locally, it is a fatal error. */
10061 if (!bfd_link_relocatable (flinfo
->info
)
10062 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
10063 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
10064 && h
->root
.type
== bfd_link_hash_undefined
10065 && !h
->def_regular
)
10069 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
10070 /* xgettext:c-format */
10071 msg
= _("%pB: protected symbol `%s' isn't defined");
10072 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
10073 /* xgettext:c-format */
10074 msg
= _("%pB: internal symbol `%s' isn't defined");
10076 /* xgettext:c-format */
10077 msg
= _("%pB: hidden symbol `%s' isn't defined");
10078 _bfd_error_handler (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
10079 bfd_set_error (bfd_error_bad_value
);
10080 eoinfo
->failed
= TRUE
;
10084 /* If this symbol should be put in the .dynsym section, then put it
10085 there now. We already know the symbol index. We also fill in
10086 the entry in the .hash section. */
10087 if (h
->dynindx
!= -1
10088 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
10089 && elf_hash_table (flinfo
->info
)->dynsym
!= NULL
10090 && !discarded_section (elf_hash_table (flinfo
->info
)->dynsym
))
10094 /* Since there is no version information in the dynamic string,
10095 if there is no version info in symbol version section, we will
10096 have a run-time problem if not linking executable, referenced
10097 by shared library, or not bound locally. */
10098 if (h
->verinfo
.verdef
== NULL
10099 && (!bfd_link_executable (flinfo
->info
)
10101 || !h
->def_regular
))
10103 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
10105 if (p
&& p
[1] != '\0')
10108 /* xgettext:c-format */
10109 (_("%pB: no symbol version section for versioned symbol `%s'"),
10110 flinfo
->output_bfd
, h
->root
.root
.string
);
10111 eoinfo
->failed
= TRUE
;
10116 sym
.st_name
= h
->dynstr_index
;
10117 esym
= (elf_hash_table (flinfo
->info
)->dynsym
->contents
10118 + h
->dynindx
* bed
->s
->sizeof_sym
);
10119 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
10121 eoinfo
->failed
= TRUE
;
10124 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
10126 if (flinfo
->hash_sec
!= NULL
)
10128 size_t hash_entry_size
;
10129 bfd_byte
*bucketpos
;
10131 size_t bucketcount
;
10134 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
10135 bucket
= h
->u
.elf_hash_value
% bucketcount
;
10138 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
10139 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
10140 + (bucket
+ 2) * hash_entry_size
);
10141 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
10142 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
10144 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
10145 ((bfd_byte
*) flinfo
->hash_sec
->contents
10146 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
10149 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
10151 Elf_Internal_Versym iversym
;
10152 Elf_External_Versym
*eversym
;
10154 if (!h
->def_regular
)
10156 if (h
->verinfo
.verdef
== NULL
10157 || (elf_dyn_lib_class (h
->verinfo
.verdef
->vd_bfd
)
10158 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
| DYN_NO_NEEDED
)))
10159 iversym
.vs_vers
= 0;
10161 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
10165 if (h
->verinfo
.vertree
== NULL
)
10166 iversym
.vs_vers
= 1;
10168 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
10169 if (flinfo
->info
->create_default_symver
)
10173 /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is
10174 defined locally. */
10175 if (h
->versioned
== versioned_hidden
&& h
->def_regular
)
10176 iversym
.vs_vers
|= VERSYM_HIDDEN
;
10178 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
10179 eversym
+= h
->dynindx
;
10180 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
10184 /* If the symbol is undefined, and we didn't output it to .dynsym,
10185 strip it from .symtab too. Obviously we can't do this for
10186 relocatable output or when needed for --emit-relocs. */
10187 else if (input_sec
== bfd_und_section_ptr
10189 /* PR 22319 Do not strip global undefined symbols marked as being needed. */
10190 && (h
->mark
!= 1 || ELF_ST_BIND (sym
.st_info
) != STB_GLOBAL
)
10191 && !bfd_link_relocatable (flinfo
->info
))
10194 /* Also strip others that we couldn't earlier due to dynamic symbol
10198 if ((input_sec
->flags
& SEC_EXCLUDE
) != 0)
10201 /* Output a FILE symbol so that following locals are not associated
10202 with the wrong input file. We need one for forced local symbols
10203 if we've seen more than one FILE symbol or when we have exactly
10204 one FILE symbol but global symbols are present in a file other
10205 than the one with the FILE symbol. We also need one if linker
10206 defined symbols are present. In practice these conditions are
10207 always met, so just emit the FILE symbol unconditionally. */
10208 if (eoinfo
->localsyms
10209 && !eoinfo
->file_sym_done
10210 && eoinfo
->flinfo
->filesym_count
!= 0)
10212 Elf_Internal_Sym fsym
;
10214 memset (&fsym
, 0, sizeof (fsym
));
10215 fsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10216 fsym
.st_shndx
= SHN_ABS
;
10217 if (!elf_link_output_symstrtab (eoinfo
->flinfo
, NULL
, &fsym
,
10218 bfd_und_section_ptr
, NULL
))
10221 eoinfo
->file_sym_done
= TRUE
;
10224 indx
= bfd_get_symcount (flinfo
->output_bfd
);
10225 ret
= elf_link_output_symstrtab (flinfo
, h
->root
.root
.string
, &sym
,
10229 eoinfo
->failed
= TRUE
;
10234 else if (h
->indx
== -2)
10240 /* Return TRUE if special handling is done for relocs in SEC against
10241 symbols defined in discarded sections. */
10244 elf_section_ignore_discarded_relocs (asection
*sec
)
10246 const struct elf_backend_data
*bed
;
10248 switch (sec
->sec_info_type
)
10250 case SEC_INFO_TYPE_STABS
:
10251 case SEC_INFO_TYPE_EH_FRAME
:
10252 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
10258 bed
= get_elf_backend_data (sec
->owner
);
10259 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
10260 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
10266 /* Return a mask saying how ld should treat relocations in SEC against
10267 symbols defined in discarded sections. If this function returns
10268 COMPLAIN set, ld will issue a warning message. If this function
10269 returns PRETEND set, and the discarded section was link-once and the
10270 same size as the kept link-once section, ld will pretend that the
10271 symbol was actually defined in the kept section. Otherwise ld will
10272 zero the reloc (at least that is the intent, but some cooperation by
10273 the target dependent code is needed, particularly for REL targets). */
10276 _bfd_elf_default_action_discarded (asection
*sec
)
10278 if (sec
->flags
& SEC_DEBUGGING
)
10281 if (strcmp (".eh_frame", sec
->name
) == 0)
10284 if (strcmp (".gcc_except_table", sec
->name
) == 0)
10287 return COMPLAIN
| PRETEND
;
10290 /* Find a match between a section and a member of a section group. */
10293 match_group_member (asection
*sec
, asection
*group
,
10294 struct bfd_link_info
*info
)
10296 asection
*first
= elf_next_in_group (group
);
10297 asection
*s
= first
;
10301 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
10304 s
= elf_next_in_group (s
);
10312 /* Check if the kept section of a discarded section SEC can be used
10313 to replace it. Return the replacement if it is OK. Otherwise return
10317 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
10321 kept
= sec
->kept_section
;
10324 if ((kept
->flags
& SEC_GROUP
) != 0)
10325 kept
= match_group_member (sec
, kept
, info
);
10327 && ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
10328 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
)))
10330 sec
->kept_section
= kept
;
10335 /* Link an input file into the linker output file. This function
10336 handles all the sections and relocations of the input file at once.
10337 This is so that we only have to read the local symbols once, and
10338 don't have to keep them in memory. */
10341 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
10343 int (*relocate_section
)
10344 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
10345 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
10347 Elf_Internal_Shdr
*symtab_hdr
;
10348 size_t locsymcount
;
10350 Elf_Internal_Sym
*isymbuf
;
10351 Elf_Internal_Sym
*isym
;
10352 Elf_Internal_Sym
*isymend
;
10354 asection
**ppsection
;
10356 const struct elf_backend_data
*bed
;
10357 struct elf_link_hash_entry
**sym_hashes
;
10358 bfd_size_type address_size
;
10359 bfd_vma r_type_mask
;
10361 bfd_boolean have_file_sym
= FALSE
;
10363 output_bfd
= flinfo
->output_bfd
;
10364 bed
= get_elf_backend_data (output_bfd
);
10365 relocate_section
= bed
->elf_backend_relocate_section
;
10367 /* If this is a dynamic object, we don't want to do anything here:
10368 we don't want the local symbols, and we don't want the section
10370 if ((input_bfd
->flags
& DYNAMIC
) != 0)
10373 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
10374 if (elf_bad_symtab (input_bfd
))
10376 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
10381 locsymcount
= symtab_hdr
->sh_info
;
10382 extsymoff
= symtab_hdr
->sh_info
;
10385 /* Read the local symbols. */
10386 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
10387 if (isymbuf
== NULL
&& locsymcount
!= 0)
10389 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
10390 flinfo
->internal_syms
,
10391 flinfo
->external_syms
,
10392 flinfo
->locsym_shndx
);
10393 if (isymbuf
== NULL
)
10397 /* Find local symbol sections and adjust values of symbols in
10398 SEC_MERGE sections. Write out those local symbols we know are
10399 going into the output file. */
10400 isymend
= isymbuf
+ locsymcount
;
10401 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
10403 isym
++, pindex
++, ppsection
++)
10407 Elf_Internal_Sym osym
;
10413 if (elf_bad_symtab (input_bfd
))
10415 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
10422 if (isym
->st_shndx
== SHN_UNDEF
)
10423 isec
= bfd_und_section_ptr
;
10424 else if (isym
->st_shndx
== SHN_ABS
)
10425 isec
= bfd_abs_section_ptr
;
10426 else if (isym
->st_shndx
== SHN_COMMON
)
10427 isec
= bfd_com_section_ptr
;
10430 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
10433 /* Don't attempt to output symbols with st_shnx in the
10434 reserved range other than SHN_ABS and SHN_COMMON. */
10435 isec
= bfd_und_section_ptr
;
10437 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
10438 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
10440 _bfd_merged_section_offset (output_bfd
, &isec
,
10441 elf_section_data (isec
)->sec_info
,
10447 /* Don't output the first, undefined, symbol. In fact, don't
10448 output any undefined local symbol. */
10449 if (isec
== bfd_und_section_ptr
)
10452 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
10454 /* We never output section symbols. Instead, we use the
10455 section symbol of the corresponding section in the output
10460 /* If we are stripping all symbols, we don't want to output this
10462 if (flinfo
->info
->strip
== strip_all
)
10465 /* If we are discarding all local symbols, we don't want to
10466 output this one. If we are generating a relocatable output
10467 file, then some of the local symbols may be required by
10468 relocs; we output them below as we discover that they are
10470 if (flinfo
->info
->discard
== discard_all
)
10473 /* If this symbol is defined in a section which we are
10474 discarding, we don't need to keep it. */
10475 if (isym
->st_shndx
!= SHN_UNDEF
10476 && isym
->st_shndx
< SHN_LORESERVE
10477 && bfd_section_removed_from_list (output_bfd
,
10478 isec
->output_section
))
10481 /* Get the name of the symbol. */
10482 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
10487 /* See if we are discarding symbols with this name. */
10488 if ((flinfo
->info
->strip
== strip_some
10489 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
10491 || (((flinfo
->info
->discard
== discard_sec_merge
10492 && (isec
->flags
& SEC_MERGE
)
10493 && !bfd_link_relocatable (flinfo
->info
))
10494 || flinfo
->info
->discard
== discard_l
)
10495 && bfd_is_local_label_name (input_bfd
, name
)))
10498 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
10500 if (input_bfd
->lto_output
)
10501 /* -flto puts a temp file name here. This means builds
10502 are not reproducible. Discard the symbol. */
10504 have_file_sym
= TRUE
;
10505 flinfo
->filesym_count
+= 1;
10507 if (!have_file_sym
)
10509 /* In the absence of debug info, bfd_find_nearest_line uses
10510 FILE symbols to determine the source file for local
10511 function symbols. Provide a FILE symbol here if input
10512 files lack such, so that their symbols won't be
10513 associated with a previous input file. It's not the
10514 source file, but the best we can do. */
10515 have_file_sym
= TRUE
;
10516 flinfo
->filesym_count
+= 1;
10517 memset (&osym
, 0, sizeof (osym
));
10518 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10519 osym
.st_shndx
= SHN_ABS
;
10520 if (!elf_link_output_symstrtab (flinfo
,
10521 (input_bfd
->lto_output
? NULL
10522 : input_bfd
->filename
),
10523 &osym
, bfd_abs_section_ptr
,
10530 /* Adjust the section index for the output file. */
10531 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
10532 isec
->output_section
);
10533 if (osym
.st_shndx
== SHN_BAD
)
10536 /* ELF symbols in relocatable files are section relative, but
10537 in executable files they are virtual addresses. Note that
10538 this code assumes that all ELF sections have an associated
10539 BFD section with a reasonable value for output_offset; below
10540 we assume that they also have a reasonable value for
10541 output_section. Any special sections must be set up to meet
10542 these requirements. */
10543 osym
.st_value
+= isec
->output_offset
;
10544 if (!bfd_link_relocatable (flinfo
->info
))
10546 osym
.st_value
+= isec
->output_section
->vma
;
10547 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
10549 /* STT_TLS symbols are relative to PT_TLS segment base. */
10550 if (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
)
10551 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
10553 osym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (osym
.st_info
),
10558 indx
= bfd_get_symcount (output_bfd
);
10559 ret
= elf_link_output_symstrtab (flinfo
, name
, &osym
, isec
, NULL
);
10566 if (bed
->s
->arch_size
== 32)
10568 r_type_mask
= 0xff;
10574 r_type_mask
= 0xffffffff;
10579 /* Relocate the contents of each section. */
10580 sym_hashes
= elf_sym_hashes (input_bfd
);
10581 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
10583 bfd_byte
*contents
;
10585 if (! o
->linker_mark
)
10587 /* This section was omitted from the link. */
10591 if (!flinfo
->info
->resolve_section_groups
10592 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
10594 /* Deal with the group signature symbol. */
10595 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
10596 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
10597 asection
*osec
= o
->output_section
;
10599 BFD_ASSERT (bfd_link_relocatable (flinfo
->info
));
10600 if (symndx
>= locsymcount
10601 || (elf_bad_symtab (input_bfd
)
10602 && flinfo
->sections
[symndx
] == NULL
))
10604 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
10605 while (h
->root
.type
== bfd_link_hash_indirect
10606 || h
->root
.type
== bfd_link_hash_warning
)
10607 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10608 /* Arrange for symbol to be output. */
10610 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
10612 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
10614 /* We'll use the output section target_index. */
10615 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
10616 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
10620 if (flinfo
->indices
[symndx
] == -1)
10622 /* Otherwise output the local symbol now. */
10623 Elf_Internal_Sym sym
= isymbuf
[symndx
];
10624 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
10629 name
= bfd_elf_string_from_elf_section (input_bfd
,
10630 symtab_hdr
->sh_link
,
10635 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
10637 if (sym
.st_shndx
== SHN_BAD
)
10640 sym
.st_value
+= o
->output_offset
;
10642 indx
= bfd_get_symcount (output_bfd
);
10643 ret
= elf_link_output_symstrtab (flinfo
, name
, &sym
, o
,
10648 flinfo
->indices
[symndx
] = indx
;
10652 elf_section_data (osec
)->this_hdr
.sh_info
10653 = flinfo
->indices
[symndx
];
10657 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
10658 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
10661 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
10663 /* Section was created by _bfd_elf_link_create_dynamic_sections
10668 /* Get the contents of the section. They have been cached by a
10669 relaxation routine. Note that o is a section in an input
10670 file, so the contents field will not have been set by any of
10671 the routines which work on output files. */
10672 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
10674 contents
= elf_section_data (o
)->this_hdr
.contents
;
10675 if (bed
->caches_rawsize
10677 && o
->rawsize
< o
->size
)
10679 memcpy (flinfo
->contents
, contents
, o
->rawsize
);
10680 contents
= flinfo
->contents
;
10685 contents
= flinfo
->contents
;
10686 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
10690 if ((o
->flags
& SEC_RELOC
) != 0)
10692 Elf_Internal_Rela
*internal_relocs
;
10693 Elf_Internal_Rela
*rel
, *relend
;
10694 int action_discarded
;
10697 /* Get the swapped relocs. */
10699 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
10700 flinfo
->internal_relocs
, FALSE
);
10701 if (internal_relocs
== NULL
10702 && o
->reloc_count
> 0)
10705 /* We need to reverse-copy input .ctors/.dtors sections if
10706 they are placed in .init_array/.finit_array for output. */
10707 if (o
->size
> address_size
10708 && ((strncmp (o
->name
, ".ctors", 6) == 0
10709 && strcmp (o
->output_section
->name
,
10710 ".init_array") == 0)
10711 || (strncmp (o
->name
, ".dtors", 6) == 0
10712 && strcmp (o
->output_section
->name
,
10713 ".fini_array") == 0))
10714 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
10716 if (o
->size
* bed
->s
->int_rels_per_ext_rel
10717 != o
->reloc_count
* address_size
)
10720 /* xgettext:c-format */
10721 (_("error: %pB: size of section %pA is not "
10722 "multiple of address size"),
10724 bfd_set_error (bfd_error_bad_value
);
10727 o
->flags
|= SEC_ELF_REVERSE_COPY
;
10730 action_discarded
= -1;
10731 if (!elf_section_ignore_discarded_relocs (o
))
10732 action_discarded
= (*bed
->action_discarded
) (o
);
10734 /* Run through the relocs evaluating complex reloc symbols and
10735 looking for relocs against symbols from discarded sections
10736 or section symbols from removed link-once sections.
10737 Complain about relocs against discarded sections. Zero
10738 relocs against removed link-once sections. */
10740 rel
= internal_relocs
;
10741 relend
= rel
+ o
->reloc_count
;
10742 for ( ; rel
< relend
; rel
++)
10744 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
10745 unsigned int s_type
;
10746 asection
**ps
, *sec
;
10747 struct elf_link_hash_entry
*h
= NULL
;
10748 const char *sym_name
;
10750 if (r_symndx
== STN_UNDEF
)
10753 if (r_symndx
>= locsymcount
10754 || (elf_bad_symtab (input_bfd
)
10755 && flinfo
->sections
[r_symndx
] == NULL
))
10757 h
= sym_hashes
[r_symndx
- extsymoff
];
10759 /* Badly formatted input files can contain relocs that
10760 reference non-existant symbols. Check here so that
10761 we do not seg fault. */
10765 /* xgettext:c-format */
10766 (_("error: %pB contains a reloc (%#" PRIx64
") for section %pA "
10767 "that references a non-existent global symbol"),
10768 input_bfd
, (uint64_t) rel
->r_info
, o
);
10769 bfd_set_error (bfd_error_bad_value
);
10773 while (h
->root
.type
== bfd_link_hash_indirect
10774 || h
->root
.type
== bfd_link_hash_warning
)
10775 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10779 /* If a plugin symbol is referenced from a non-IR file,
10780 mark the symbol as undefined. Note that the
10781 linker may attach linker created dynamic sections
10782 to the plugin bfd. Symbols defined in linker
10783 created sections are not plugin symbols. */
10784 if ((h
->root
.non_ir_ref_regular
10785 || h
->root
.non_ir_ref_dynamic
)
10786 && (h
->root
.type
== bfd_link_hash_defined
10787 || h
->root
.type
== bfd_link_hash_defweak
)
10788 && (h
->root
.u
.def
.section
->flags
10789 & SEC_LINKER_CREATED
) == 0
10790 && h
->root
.u
.def
.section
->owner
!= NULL
10791 && (h
->root
.u
.def
.section
->owner
->flags
10792 & BFD_PLUGIN
) != 0)
10794 h
->root
.type
= bfd_link_hash_undefined
;
10795 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
10799 if (h
->root
.type
== bfd_link_hash_defined
10800 || h
->root
.type
== bfd_link_hash_defweak
)
10801 ps
= &h
->root
.u
.def
.section
;
10803 sym_name
= h
->root
.root
.string
;
10807 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
10809 s_type
= ELF_ST_TYPE (sym
->st_info
);
10810 ps
= &flinfo
->sections
[r_symndx
];
10811 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
10815 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
10816 && !bfd_link_relocatable (flinfo
->info
))
10819 bfd_vma dot
= (rel
->r_offset
10820 + o
->output_offset
+ o
->output_section
->vma
);
10822 printf ("Encountered a complex symbol!");
10823 printf (" (input_bfd %s, section %s, reloc %ld\n",
10824 input_bfd
->filename
, o
->name
,
10825 (long) (rel
- internal_relocs
));
10826 printf (" symbol: idx %8.8lx, name %s\n",
10827 r_symndx
, sym_name
);
10828 printf (" reloc : info %8.8lx, addr %8.8lx\n",
10829 (unsigned long) rel
->r_info
,
10830 (unsigned long) rel
->r_offset
);
10832 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
10833 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
10836 /* Symbol evaluated OK. Update to absolute value. */
10837 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
10842 if (action_discarded
!= -1 && ps
!= NULL
)
10844 /* Complain if the definition comes from a
10845 discarded section. */
10846 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
10848 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
10849 if (action_discarded
& COMPLAIN
)
10850 (*flinfo
->info
->callbacks
->einfo
)
10851 /* xgettext:c-format */
10852 (_("%X`%s' referenced in section `%pA' of %pB: "
10853 "defined in discarded section `%pA' of %pB\n"),
10854 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
10856 /* Try to do the best we can to support buggy old
10857 versions of gcc. Pretend that the symbol is
10858 really defined in the kept linkonce section.
10859 FIXME: This is quite broken. Modifying the
10860 symbol here means we will be changing all later
10861 uses of the symbol, not just in this section. */
10862 if (action_discarded
& PRETEND
)
10866 kept
= _bfd_elf_check_kept_section (sec
,
10878 /* Relocate the section by invoking a back end routine.
10880 The back end routine is responsible for adjusting the
10881 section contents as necessary, and (if using Rela relocs
10882 and generating a relocatable output file) adjusting the
10883 reloc addend as necessary.
10885 The back end routine does not have to worry about setting
10886 the reloc address or the reloc symbol index.
10888 The back end routine is given a pointer to the swapped in
10889 internal symbols, and can access the hash table entries
10890 for the external symbols via elf_sym_hashes (input_bfd).
10892 When generating relocatable output, the back end routine
10893 must handle STB_LOCAL/STT_SECTION symbols specially. The
10894 output symbol is going to be a section symbol
10895 corresponding to the output section, which will require
10896 the addend to be adjusted. */
10898 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
10899 input_bfd
, o
, contents
,
10907 || bfd_link_relocatable (flinfo
->info
)
10908 || flinfo
->info
->emitrelocations
)
10910 Elf_Internal_Rela
*irela
;
10911 Elf_Internal_Rela
*irelaend
, *irelamid
;
10912 bfd_vma last_offset
;
10913 struct elf_link_hash_entry
**rel_hash
;
10914 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
10915 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
10916 unsigned int next_erel
;
10917 bfd_boolean rela_normal
;
10918 struct bfd_elf_section_data
*esdi
, *esdo
;
10920 esdi
= elf_section_data (o
);
10921 esdo
= elf_section_data (o
->output_section
);
10922 rela_normal
= FALSE
;
10924 /* Adjust the reloc addresses and symbol indices. */
10926 irela
= internal_relocs
;
10927 irelaend
= irela
+ o
->reloc_count
;
10928 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
10929 /* We start processing the REL relocs, if any. When we reach
10930 IRELAMID in the loop, we switch to the RELA relocs. */
10932 if (esdi
->rel
.hdr
!= NULL
)
10933 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
10934 * bed
->s
->int_rels_per_ext_rel
);
10935 rel_hash_list
= rel_hash
;
10936 rela_hash_list
= NULL
;
10937 last_offset
= o
->output_offset
;
10938 if (!bfd_link_relocatable (flinfo
->info
))
10939 last_offset
+= o
->output_section
->vma
;
10940 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
10942 unsigned long r_symndx
;
10944 Elf_Internal_Sym sym
;
10946 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
10952 if (irela
== irelamid
)
10954 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
10955 rela_hash_list
= rel_hash
;
10956 rela_normal
= bed
->rela_normal
;
10959 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
10962 if (irela
->r_offset
>= (bfd_vma
) -2)
10964 /* This is a reloc for a deleted entry or somesuch.
10965 Turn it into an R_*_NONE reloc, at the same
10966 offset as the last reloc. elf_eh_frame.c and
10967 bfd_elf_discard_info rely on reloc offsets
10969 irela
->r_offset
= last_offset
;
10971 irela
->r_addend
= 0;
10975 irela
->r_offset
+= o
->output_offset
;
10977 /* Relocs in an executable have to be virtual addresses. */
10978 if (!bfd_link_relocatable (flinfo
->info
))
10979 irela
->r_offset
+= o
->output_section
->vma
;
10981 last_offset
= irela
->r_offset
;
10983 r_symndx
= irela
->r_info
>> r_sym_shift
;
10984 if (r_symndx
== STN_UNDEF
)
10987 if (r_symndx
>= locsymcount
10988 || (elf_bad_symtab (input_bfd
)
10989 && flinfo
->sections
[r_symndx
] == NULL
))
10991 struct elf_link_hash_entry
*rh
;
10992 unsigned long indx
;
10994 /* This is a reloc against a global symbol. We
10995 have not yet output all the local symbols, so
10996 we do not know the symbol index of any global
10997 symbol. We set the rel_hash entry for this
10998 reloc to point to the global hash table entry
10999 for this symbol. The symbol index is then
11000 set at the end of bfd_elf_final_link. */
11001 indx
= r_symndx
- extsymoff
;
11002 rh
= elf_sym_hashes (input_bfd
)[indx
];
11003 while (rh
->root
.type
== bfd_link_hash_indirect
11004 || rh
->root
.type
== bfd_link_hash_warning
)
11005 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
11007 /* Setting the index to -2 tells
11008 elf_link_output_extsym that this symbol is
11009 used by a reloc. */
11010 BFD_ASSERT (rh
->indx
< 0);
11017 /* This is a reloc against a local symbol. */
11020 sym
= isymbuf
[r_symndx
];
11021 sec
= flinfo
->sections
[r_symndx
];
11022 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
11024 /* I suppose the backend ought to fill in the
11025 section of any STT_SECTION symbol against a
11026 processor specific section. */
11027 r_symndx
= STN_UNDEF
;
11028 if (bfd_is_abs_section (sec
))
11030 else if (sec
== NULL
|| sec
->owner
== NULL
)
11032 bfd_set_error (bfd_error_bad_value
);
11037 asection
*osec
= sec
->output_section
;
11039 /* If we have discarded a section, the output
11040 section will be the absolute section. In
11041 case of discarded SEC_MERGE sections, use
11042 the kept section. relocate_section should
11043 have already handled discarded linkonce
11045 if (bfd_is_abs_section (osec
)
11046 && sec
->kept_section
!= NULL
11047 && sec
->kept_section
->output_section
!= NULL
)
11049 osec
= sec
->kept_section
->output_section
;
11050 irela
->r_addend
-= osec
->vma
;
11053 if (!bfd_is_abs_section (osec
))
11055 r_symndx
= osec
->target_index
;
11056 if (r_symndx
== STN_UNDEF
)
11058 irela
->r_addend
+= osec
->vma
;
11059 osec
= _bfd_nearby_section (output_bfd
, osec
,
11061 irela
->r_addend
-= osec
->vma
;
11062 r_symndx
= osec
->target_index
;
11067 /* Adjust the addend according to where the
11068 section winds up in the output section. */
11070 irela
->r_addend
+= sec
->output_offset
;
11074 if (flinfo
->indices
[r_symndx
] == -1)
11076 unsigned long shlink
;
11081 if (flinfo
->info
->strip
== strip_all
)
11083 /* You can't do ld -r -s. */
11084 bfd_set_error (bfd_error_invalid_operation
);
11088 /* This symbol was skipped earlier, but
11089 since it is needed by a reloc, we
11090 must output it now. */
11091 shlink
= symtab_hdr
->sh_link
;
11092 name
= (bfd_elf_string_from_elf_section
11093 (input_bfd
, shlink
, sym
.st_name
));
11097 osec
= sec
->output_section
;
11099 _bfd_elf_section_from_bfd_section (output_bfd
,
11101 if (sym
.st_shndx
== SHN_BAD
)
11104 sym
.st_value
+= sec
->output_offset
;
11105 if (!bfd_link_relocatable (flinfo
->info
))
11107 sym
.st_value
+= osec
->vma
;
11108 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
11110 struct elf_link_hash_table
*htab
11111 = elf_hash_table (flinfo
->info
);
11113 /* STT_TLS symbols are relative to PT_TLS
11115 if (htab
->tls_sec
!= NULL
)
11116 sym
.st_value
-= htab
->tls_sec
->vma
;
11119 = ELF_ST_INFO (ELF_ST_BIND (sym
.st_info
),
11124 indx
= bfd_get_symcount (output_bfd
);
11125 ret
= elf_link_output_symstrtab (flinfo
, name
,
11131 flinfo
->indices
[r_symndx
] = indx
;
11136 r_symndx
= flinfo
->indices
[r_symndx
];
11139 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
11140 | (irela
->r_info
& r_type_mask
));
11143 /* Swap out the relocs. */
11144 input_rel_hdr
= esdi
->rel
.hdr
;
11145 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
11147 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
11152 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
11153 * bed
->s
->int_rels_per_ext_rel
);
11154 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
11157 input_rela_hdr
= esdi
->rela
.hdr
;
11158 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
11160 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
11169 /* Write out the modified section contents. */
11170 if (bed
->elf_backend_write_section
11171 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
11174 /* Section written out. */
11176 else switch (o
->sec_info_type
)
11178 case SEC_INFO_TYPE_STABS
:
11179 if (! (_bfd_write_section_stabs
11181 &elf_hash_table (flinfo
->info
)->stab_info
,
11182 o
, &elf_section_data (o
)->sec_info
, contents
)))
11185 case SEC_INFO_TYPE_MERGE
:
11186 if (! _bfd_write_merged_section (output_bfd
, o
,
11187 elf_section_data (o
)->sec_info
))
11190 case SEC_INFO_TYPE_EH_FRAME
:
11192 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
11197 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
11199 if (! _bfd_elf_write_section_eh_frame_entry (output_bfd
,
11207 if (! (o
->flags
& SEC_EXCLUDE
))
11209 file_ptr offset
= (file_ptr
) o
->output_offset
;
11210 bfd_size_type todo
= o
->size
;
11212 offset
*= bfd_octets_per_byte (output_bfd
);
11214 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
11216 /* Reverse-copy input section to output. */
11219 todo
-= address_size
;
11220 if (! bfd_set_section_contents (output_bfd
,
11228 offset
+= address_size
;
11232 else if (! bfd_set_section_contents (output_bfd
,
11246 /* Generate a reloc when linking an ELF file. This is a reloc
11247 requested by the linker, and does not come from any input file. This
11248 is used to build constructor and destructor tables when linking
11252 elf_reloc_link_order (bfd
*output_bfd
,
11253 struct bfd_link_info
*info
,
11254 asection
*output_section
,
11255 struct bfd_link_order
*link_order
)
11257 reloc_howto_type
*howto
;
11261 struct bfd_elf_section_reloc_data
*reldata
;
11262 struct elf_link_hash_entry
**rel_hash_ptr
;
11263 Elf_Internal_Shdr
*rel_hdr
;
11264 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
11265 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
11268 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
11270 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
11273 bfd_set_error (bfd_error_bad_value
);
11277 addend
= link_order
->u
.reloc
.p
->addend
;
11280 reldata
= &esdo
->rel
;
11281 else if (esdo
->rela
.hdr
)
11282 reldata
= &esdo
->rela
;
11289 /* Figure out the symbol index. */
11290 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
11291 if (link_order
->type
== bfd_section_reloc_link_order
)
11293 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
11294 BFD_ASSERT (indx
!= 0);
11295 *rel_hash_ptr
= NULL
;
11299 struct elf_link_hash_entry
*h
;
11301 /* Treat a reloc against a defined symbol as though it were
11302 actually against the section. */
11303 h
= ((struct elf_link_hash_entry
*)
11304 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
11305 link_order
->u
.reloc
.p
->u
.name
,
11306 FALSE
, FALSE
, TRUE
));
11308 && (h
->root
.type
== bfd_link_hash_defined
11309 || h
->root
.type
== bfd_link_hash_defweak
))
11313 section
= h
->root
.u
.def
.section
;
11314 indx
= section
->output_section
->target_index
;
11315 *rel_hash_ptr
= NULL
;
11316 /* It seems that we ought to add the symbol value to the
11317 addend here, but in practice it has already been added
11318 because it was passed to constructor_callback. */
11319 addend
+= section
->output_section
->vma
+ section
->output_offset
;
11321 else if (h
!= NULL
)
11323 /* Setting the index to -2 tells elf_link_output_extsym that
11324 this symbol is used by a reloc. */
11331 (*info
->callbacks
->unattached_reloc
)
11332 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0);
11337 /* If this is an inplace reloc, we must write the addend into the
11339 if (howto
->partial_inplace
&& addend
!= 0)
11341 bfd_size_type size
;
11342 bfd_reloc_status_type rstat
;
11345 const char *sym_name
;
11347 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
11348 buf
= (bfd_byte
*) bfd_zmalloc (size
);
11349 if (buf
== NULL
&& size
!= 0)
11351 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
11358 case bfd_reloc_outofrange
:
11361 case bfd_reloc_overflow
:
11362 if (link_order
->type
== bfd_section_reloc_link_order
)
11363 sym_name
= bfd_section_name (output_bfd
,
11364 link_order
->u
.reloc
.p
->u
.section
);
11366 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
11367 (*info
->callbacks
->reloc_overflow
) (info
, NULL
, sym_name
,
11368 howto
->name
, addend
, NULL
, NULL
,
11373 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
11375 * bfd_octets_per_byte (output_bfd
),
11382 /* The address of a reloc is relative to the section in a
11383 relocatable file, and is a virtual address in an executable
11385 offset
= link_order
->offset
;
11386 if (! bfd_link_relocatable (info
))
11387 offset
+= output_section
->vma
;
11389 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
11391 irel
[i
].r_offset
= offset
;
11392 irel
[i
].r_info
= 0;
11393 irel
[i
].r_addend
= 0;
11395 if (bed
->s
->arch_size
== 32)
11396 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
11398 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
11400 rel_hdr
= reldata
->hdr
;
11401 erel
= rel_hdr
->contents
;
11402 if (rel_hdr
->sh_type
== SHT_REL
)
11404 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
11405 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
11409 irel
[0].r_addend
= addend
;
11410 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
11411 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
11420 /* Get the output vma of the section pointed to by the sh_link field. */
11423 elf_get_linked_section_vma (struct bfd_link_order
*p
)
11425 Elf_Internal_Shdr
**elf_shdrp
;
11429 s
= p
->u
.indirect
.section
;
11430 elf_shdrp
= elf_elfsections (s
->owner
);
11431 elfsec
= _bfd_elf_section_from_bfd_section (s
->owner
, s
);
11432 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
11434 The Intel C compiler generates SHT_IA_64_UNWIND with
11435 SHF_LINK_ORDER. But it doesn't set the sh_link or
11436 sh_info fields. Hence we could get the situation
11437 where elfsec is 0. */
11440 const struct elf_backend_data
*bed
11441 = get_elf_backend_data (s
->owner
);
11442 if (bed
->link_order_error_handler
)
11443 bed
->link_order_error_handler
11444 /* xgettext:c-format */
11445 (_("%pB: warning: sh_link not set for section `%pA'"), s
->owner
, s
);
11450 s
= elf_shdrp
[elfsec
]->bfd_section
;
11451 return s
->output_section
->vma
+ s
->output_offset
;
11456 /* Compare two sections based on the locations of the sections they are
11457 linked to. Used by elf_fixup_link_order. */
11460 compare_link_order (const void * a
, const void * b
)
11465 apos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)a
);
11466 bpos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)b
);
11469 return apos
> bpos
;
11473 /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
11474 order as their linked sections. Returns false if this could not be done
11475 because an output section includes both ordered and unordered
11476 sections. Ideally we'd do this in the linker proper. */
11479 elf_fixup_link_order (bfd
*abfd
, asection
*o
)
11481 int seen_linkorder
;
11484 struct bfd_link_order
*p
;
11486 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11488 struct bfd_link_order
**sections
;
11489 asection
*s
, *other_sec
, *linkorder_sec
;
11493 linkorder_sec
= NULL
;
11495 seen_linkorder
= 0;
11496 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11498 if (p
->type
== bfd_indirect_link_order
)
11500 s
= p
->u
.indirect
.section
;
11502 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
11503 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
11504 && (elfsec
= _bfd_elf_section_from_bfd_section (sub
, s
))
11505 && elfsec
< elf_numsections (sub
)
11506 && elf_elfsections (sub
)[elfsec
]->sh_flags
& SHF_LINK_ORDER
11507 && elf_elfsections (sub
)[elfsec
]->sh_link
< elf_numsections (sub
))
11521 if (seen_other
&& seen_linkorder
)
11523 if (other_sec
&& linkorder_sec
)
11525 /* xgettext:c-format */
11526 (_("%pA has both ordered [`%pA' in %pB] "
11527 "and unordered [`%pA' in %pB] sections"),
11528 o
, linkorder_sec
, linkorder_sec
->owner
,
11529 other_sec
, other_sec
->owner
);
11532 (_("%pA has both ordered and unordered sections"), o
);
11533 bfd_set_error (bfd_error_bad_value
);
11538 if (!seen_linkorder
)
11541 sections
= (struct bfd_link_order
**)
11542 bfd_malloc (seen_linkorder
* sizeof (struct bfd_link_order
*));
11543 if (sections
== NULL
)
11545 seen_linkorder
= 0;
11547 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11549 sections
[seen_linkorder
++] = p
;
11551 /* Sort the input sections in the order of their linked section. */
11552 qsort (sections
, seen_linkorder
, sizeof (struct bfd_link_order
*),
11553 compare_link_order
);
11555 /* Change the offsets of the sections. */
11557 for (n
= 0; n
< seen_linkorder
; n
++)
11559 s
= sections
[n
]->u
.indirect
.section
;
11560 offset
&= ~(bfd_vma
) 0 << s
->alignment_power
;
11561 s
->output_offset
= offset
/ bfd_octets_per_byte (abfd
);
11562 sections
[n
]->offset
= offset
;
11563 offset
+= sections
[n
]->size
;
11570 /* Generate an import library in INFO->implib_bfd from symbols in ABFD.
11571 Returns TRUE upon success, FALSE otherwise. */
11574 elf_output_implib (bfd
*abfd
, struct bfd_link_info
*info
)
11576 bfd_boolean ret
= FALSE
;
11578 const struct elf_backend_data
*bed
;
11580 enum bfd_architecture arch
;
11582 asymbol
**sympp
= NULL
;
11586 elf_symbol_type
*osymbuf
;
11588 implib_bfd
= info
->out_implib_bfd
;
11589 bed
= get_elf_backend_data (abfd
);
11591 if (!bfd_set_format (implib_bfd
, bfd_object
))
11594 /* Use flag from executable but make it a relocatable object. */
11595 flags
= bfd_get_file_flags (abfd
);
11596 flags
&= ~HAS_RELOC
;
11597 if (!bfd_set_start_address (implib_bfd
, 0)
11598 || !bfd_set_file_flags (implib_bfd
, flags
& ~EXEC_P
))
11601 /* Copy architecture of output file to import library file. */
11602 arch
= bfd_get_arch (abfd
);
11603 mach
= bfd_get_mach (abfd
);
11604 if (!bfd_set_arch_mach (implib_bfd
, arch
, mach
)
11605 && (abfd
->target_defaulted
11606 || bfd_get_arch (abfd
) != bfd_get_arch (implib_bfd
)))
11609 /* Get symbol table size. */
11610 symsize
= bfd_get_symtab_upper_bound (abfd
);
11614 /* Read in the symbol table. */
11615 sympp
= (asymbol
**) xmalloc (symsize
);
11616 symcount
= bfd_canonicalize_symtab (abfd
, sympp
);
11620 /* Allow the BFD backend to copy any private header data it
11621 understands from the output BFD to the import library BFD. */
11622 if (! bfd_copy_private_header_data (abfd
, implib_bfd
))
11625 /* Filter symbols to appear in the import library. */
11626 if (bed
->elf_backend_filter_implib_symbols
)
11627 symcount
= bed
->elf_backend_filter_implib_symbols (abfd
, info
, sympp
,
11630 symcount
= _bfd_elf_filter_global_symbols (abfd
, info
, sympp
, symcount
);
11633 bfd_set_error (bfd_error_no_symbols
);
11634 _bfd_error_handler (_("%pB: no symbol found for import library"),
11640 /* Make symbols absolute. */
11641 osymbuf
= (elf_symbol_type
*) bfd_alloc2 (implib_bfd
, symcount
,
11642 sizeof (*osymbuf
));
11643 for (src_count
= 0; src_count
< symcount
; src_count
++)
11645 memcpy (&osymbuf
[src_count
], (elf_symbol_type
*) sympp
[src_count
],
11646 sizeof (*osymbuf
));
11647 osymbuf
[src_count
].symbol
.section
= bfd_abs_section_ptr
;
11648 osymbuf
[src_count
].internal_elf_sym
.st_shndx
= SHN_ABS
;
11649 osymbuf
[src_count
].symbol
.value
+= sympp
[src_count
]->section
->vma
;
11650 osymbuf
[src_count
].internal_elf_sym
.st_value
=
11651 osymbuf
[src_count
].symbol
.value
;
11652 sympp
[src_count
] = &osymbuf
[src_count
].symbol
;
11655 bfd_set_symtab (implib_bfd
, sympp
, symcount
);
11657 /* Allow the BFD backend to copy any private data it understands
11658 from the output BFD to the import library BFD. This is done last
11659 to permit the routine to look at the filtered symbol table. */
11660 if (! bfd_copy_private_bfd_data (abfd
, implib_bfd
))
11663 if (!bfd_close (implib_bfd
))
11674 elf_final_link_free (bfd
*obfd
, struct elf_final_link_info
*flinfo
)
11678 if (flinfo
->symstrtab
!= NULL
)
11679 _bfd_elf_strtab_free (flinfo
->symstrtab
);
11680 if (flinfo
->contents
!= NULL
)
11681 free (flinfo
->contents
);
11682 if (flinfo
->external_relocs
!= NULL
)
11683 free (flinfo
->external_relocs
);
11684 if (flinfo
->internal_relocs
!= NULL
)
11685 free (flinfo
->internal_relocs
);
11686 if (flinfo
->external_syms
!= NULL
)
11687 free (flinfo
->external_syms
);
11688 if (flinfo
->locsym_shndx
!= NULL
)
11689 free (flinfo
->locsym_shndx
);
11690 if (flinfo
->internal_syms
!= NULL
)
11691 free (flinfo
->internal_syms
);
11692 if (flinfo
->indices
!= NULL
)
11693 free (flinfo
->indices
);
11694 if (flinfo
->sections
!= NULL
)
11695 free (flinfo
->sections
);
11696 if (flinfo
->symshndxbuf
!= NULL
11697 && flinfo
->symshndxbuf
!= (Elf_External_Sym_Shndx
*) -1)
11698 free (flinfo
->symshndxbuf
);
11699 for (o
= obfd
->sections
; o
!= NULL
; o
= o
->next
)
11701 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11702 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
11703 free (esdo
->rel
.hashes
);
11704 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
11705 free (esdo
->rela
.hashes
);
11709 /* Do the final step of an ELF link. */
11712 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
11714 bfd_boolean dynamic
;
11715 bfd_boolean emit_relocs
;
11717 struct elf_final_link_info flinfo
;
11719 struct bfd_link_order
*p
;
11721 bfd_size_type max_contents_size
;
11722 bfd_size_type max_external_reloc_size
;
11723 bfd_size_type max_internal_reloc_count
;
11724 bfd_size_type max_sym_count
;
11725 bfd_size_type max_sym_shndx_count
;
11726 Elf_Internal_Sym elfsym
;
11728 Elf_Internal_Shdr
*symtab_hdr
;
11729 Elf_Internal_Shdr
*symtab_shndx_hdr
;
11730 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11731 struct elf_outext_info eoinfo
;
11732 bfd_boolean merged
;
11733 size_t relativecount
= 0;
11734 asection
*reldyn
= 0;
11736 asection
*attr_section
= NULL
;
11737 bfd_vma attr_size
= 0;
11738 const char *std_attrs_section
;
11739 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
11741 if (!is_elf_hash_table (htab
))
11744 if (bfd_link_pic (info
))
11745 abfd
->flags
|= DYNAMIC
;
11747 dynamic
= htab
->dynamic_sections_created
;
11748 dynobj
= htab
->dynobj
;
11750 emit_relocs
= (bfd_link_relocatable (info
)
11751 || info
->emitrelocations
);
11753 flinfo
.info
= info
;
11754 flinfo
.output_bfd
= abfd
;
11755 flinfo
.symstrtab
= _bfd_elf_strtab_init ();
11756 if (flinfo
.symstrtab
== NULL
)
11761 flinfo
.hash_sec
= NULL
;
11762 flinfo
.symver_sec
= NULL
;
11766 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
11767 /* Note that dynsym_sec can be NULL (on VMS). */
11768 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
11769 /* Note that it is OK if symver_sec is NULL. */
11772 flinfo
.contents
= NULL
;
11773 flinfo
.external_relocs
= NULL
;
11774 flinfo
.internal_relocs
= NULL
;
11775 flinfo
.external_syms
= NULL
;
11776 flinfo
.locsym_shndx
= NULL
;
11777 flinfo
.internal_syms
= NULL
;
11778 flinfo
.indices
= NULL
;
11779 flinfo
.sections
= NULL
;
11780 flinfo
.symshndxbuf
= NULL
;
11781 flinfo
.filesym_count
= 0;
11783 /* The object attributes have been merged. Remove the input
11784 sections from the link, and set the contents of the output
11786 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
11787 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11789 bfd_boolean remove_section
= FALSE
;
11791 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
11792 || strcmp (o
->name
, ".gnu.attributes") == 0)
11794 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11796 asection
*input_section
;
11798 if (p
->type
!= bfd_indirect_link_order
)
11800 input_section
= p
->u
.indirect
.section
;
11801 /* Hack: reset the SEC_HAS_CONTENTS flag so that
11802 elf_link_input_bfd ignores this section. */
11803 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
11806 attr_size
= bfd_elf_obj_attr_size (abfd
);
11807 bfd_set_section_size (abfd
, o
, attr_size
);
11808 /* Skip this section later on. */
11809 o
->map_head
.link_order
= NULL
;
11813 remove_section
= TRUE
;
11815 else if ((o
->flags
& SEC_GROUP
) != 0 && o
->size
== 0)
11817 /* Remove empty group section from linker output. */
11818 remove_section
= TRUE
;
11820 if (remove_section
)
11822 o
->flags
|= SEC_EXCLUDE
;
11823 bfd_section_list_remove (abfd
, o
);
11824 abfd
->section_count
--;
11828 /* Count up the number of relocations we will output for each output
11829 section, so that we know the sizes of the reloc sections. We
11830 also figure out some maximum sizes. */
11831 max_contents_size
= 0;
11832 max_external_reloc_size
= 0;
11833 max_internal_reloc_count
= 0;
11835 max_sym_shndx_count
= 0;
11837 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11839 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11840 o
->reloc_count
= 0;
11842 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
11844 unsigned int reloc_count
= 0;
11845 unsigned int additional_reloc_count
= 0;
11846 struct bfd_elf_section_data
*esdi
= NULL
;
11848 if (p
->type
== bfd_section_reloc_link_order
11849 || p
->type
== bfd_symbol_reloc_link_order
)
11851 else if (p
->type
== bfd_indirect_link_order
)
11855 sec
= p
->u
.indirect
.section
;
11857 /* Mark all sections which are to be included in the
11858 link. This will normally be every section. We need
11859 to do this so that we can identify any sections which
11860 the linker has decided to not include. */
11861 sec
->linker_mark
= TRUE
;
11863 if (sec
->flags
& SEC_MERGE
)
11866 if (sec
->rawsize
> max_contents_size
)
11867 max_contents_size
= sec
->rawsize
;
11868 if (sec
->size
> max_contents_size
)
11869 max_contents_size
= sec
->size
;
11871 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
11872 && (sec
->owner
->flags
& DYNAMIC
) == 0)
11876 /* We are interested in just local symbols, not all
11878 if (elf_bad_symtab (sec
->owner
))
11879 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
11880 / bed
->s
->sizeof_sym
);
11882 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
11884 if (sym_count
> max_sym_count
)
11885 max_sym_count
= sym_count
;
11887 if (sym_count
> max_sym_shndx_count
11888 && elf_symtab_shndx_list (sec
->owner
) != NULL
)
11889 max_sym_shndx_count
= sym_count
;
11891 if (esdo
->this_hdr
.sh_type
== SHT_REL
11892 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
11893 /* Some backends use reloc_count in relocation sections
11894 to count particular types of relocs. Of course,
11895 reloc sections themselves can't have relocations. */
11897 else if (emit_relocs
)
11899 reloc_count
= sec
->reloc_count
;
11900 if (bed
->elf_backend_count_additional_relocs
)
11903 c
= (*bed
->elf_backend_count_additional_relocs
) (sec
);
11904 additional_reloc_count
+= c
;
11907 else if (bed
->elf_backend_count_relocs
)
11908 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
11910 esdi
= elf_section_data (sec
);
11912 if ((sec
->flags
& SEC_RELOC
) != 0)
11914 size_t ext_size
= 0;
11916 if (esdi
->rel
.hdr
!= NULL
)
11917 ext_size
= esdi
->rel
.hdr
->sh_size
;
11918 if (esdi
->rela
.hdr
!= NULL
)
11919 ext_size
+= esdi
->rela
.hdr
->sh_size
;
11921 if (ext_size
> max_external_reloc_size
)
11922 max_external_reloc_size
= ext_size
;
11923 if (sec
->reloc_count
> max_internal_reloc_count
)
11924 max_internal_reloc_count
= sec
->reloc_count
;
11929 if (reloc_count
== 0)
11932 reloc_count
+= additional_reloc_count
;
11933 o
->reloc_count
+= reloc_count
;
11935 if (p
->type
== bfd_indirect_link_order
&& emit_relocs
)
11939 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
11940 esdo
->rel
.count
+= additional_reloc_count
;
11942 if (esdi
->rela
.hdr
)
11944 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
11945 esdo
->rela
.count
+= additional_reloc_count
;
11951 esdo
->rela
.count
+= reloc_count
;
11953 esdo
->rel
.count
+= reloc_count
;
11957 if (o
->reloc_count
> 0)
11958 o
->flags
|= SEC_RELOC
;
11961 /* Explicitly clear the SEC_RELOC flag. The linker tends to
11962 set it (this is probably a bug) and if it is set
11963 assign_section_numbers will create a reloc section. */
11964 o
->flags
&=~ SEC_RELOC
;
11967 /* If the SEC_ALLOC flag is not set, force the section VMA to
11968 zero. This is done in elf_fake_sections as well, but forcing
11969 the VMA to 0 here will ensure that relocs against these
11970 sections are handled correctly. */
11971 if ((o
->flags
& SEC_ALLOC
) == 0
11972 && ! o
->user_set_vma
)
11976 if (! bfd_link_relocatable (info
) && merged
)
11977 elf_link_hash_traverse (htab
, _bfd_elf_link_sec_merge_syms
, abfd
);
11979 /* Figure out the file positions for everything but the symbol table
11980 and the relocs. We set symcount to force assign_section_numbers
11981 to create a symbol table. */
11982 bfd_get_symcount (abfd
) = info
->strip
!= strip_all
|| emit_relocs
;
11983 BFD_ASSERT (! abfd
->output_has_begun
);
11984 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
11987 /* Set sizes, and assign file positions for reloc sections. */
11988 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11990 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11991 if ((o
->flags
& SEC_RELOC
) != 0)
11994 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
11998 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
12002 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
12003 to count upwards while actually outputting the relocations. */
12004 esdo
->rel
.count
= 0;
12005 esdo
->rela
.count
= 0;
12007 if (esdo
->this_hdr
.sh_offset
== (file_ptr
) -1)
12009 /* Cache the section contents so that they can be compressed
12010 later. Use bfd_malloc since it will be freed by
12011 bfd_compress_section_contents. */
12012 unsigned char *contents
= esdo
->this_hdr
.contents
;
12013 if ((o
->flags
& SEC_ELF_COMPRESS
) == 0 || contents
!= NULL
)
12016 = (unsigned char *) bfd_malloc (esdo
->this_hdr
.sh_size
);
12017 if (contents
== NULL
)
12019 esdo
->this_hdr
.contents
= contents
;
12023 /* We have now assigned file positions for all the sections except
12024 .symtab, .strtab, and non-loaded reloc sections. We start the
12025 .symtab section at the current file position, and write directly
12026 to it. We build the .strtab section in memory. */
12027 bfd_get_symcount (abfd
) = 0;
12028 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12029 /* sh_name is set in prep_headers. */
12030 symtab_hdr
->sh_type
= SHT_SYMTAB
;
12031 /* sh_flags, sh_addr and sh_size all start off zero. */
12032 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
12033 /* sh_link is set in assign_section_numbers. */
12034 /* sh_info is set below. */
12035 /* sh_offset is set just below. */
12036 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
12038 if (max_sym_count
< 20)
12039 max_sym_count
= 20;
12040 htab
->strtabsize
= max_sym_count
;
12041 amt
= max_sym_count
* sizeof (struct elf_sym_strtab
);
12042 htab
->strtab
= (struct elf_sym_strtab
*) bfd_malloc (amt
);
12043 if (htab
->strtab
== NULL
)
12045 /* The real buffer will be allocated in elf_link_swap_symbols_out. */
12047 = (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF)
12048 ? (Elf_External_Sym_Shndx
*) -1 : NULL
);
12050 if (info
->strip
!= strip_all
|| emit_relocs
)
12052 file_ptr off
= elf_next_file_pos (abfd
);
12054 _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
12056 /* Note that at this point elf_next_file_pos (abfd) is
12057 incorrect. We do not yet know the size of the .symtab section.
12058 We correct next_file_pos below, after we do know the size. */
12060 /* Start writing out the symbol table. The first symbol is always a
12062 elfsym
.st_value
= 0;
12063 elfsym
.st_size
= 0;
12064 elfsym
.st_info
= 0;
12065 elfsym
.st_other
= 0;
12066 elfsym
.st_shndx
= SHN_UNDEF
;
12067 elfsym
.st_target_internal
= 0;
12068 if (elf_link_output_symstrtab (&flinfo
, NULL
, &elfsym
,
12069 bfd_und_section_ptr
, NULL
) != 1)
12072 /* Output a symbol for each section. We output these even if we are
12073 discarding local symbols, since they are used for relocs. These
12074 symbols have no names. We store the index of each one in the
12075 index field of the section, so that we can find it again when
12076 outputting relocs. */
12078 elfsym
.st_size
= 0;
12079 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
12080 elfsym
.st_other
= 0;
12081 elfsym
.st_value
= 0;
12082 elfsym
.st_target_internal
= 0;
12083 for (i
= 1; i
< elf_numsections (abfd
); i
++)
12085 o
= bfd_section_from_elf_index (abfd
, i
);
12088 o
->target_index
= bfd_get_symcount (abfd
);
12089 elfsym
.st_shndx
= i
;
12090 if (!bfd_link_relocatable (info
))
12091 elfsym
.st_value
= o
->vma
;
12092 if (elf_link_output_symstrtab (&flinfo
, NULL
, &elfsym
, o
,
12099 /* Allocate some memory to hold information read in from the input
12101 if (max_contents_size
!= 0)
12103 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
12104 if (flinfo
.contents
== NULL
)
12108 if (max_external_reloc_size
!= 0)
12110 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
12111 if (flinfo
.external_relocs
== NULL
)
12115 if (max_internal_reloc_count
!= 0)
12117 amt
= max_internal_reloc_count
* sizeof (Elf_Internal_Rela
);
12118 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
12119 if (flinfo
.internal_relocs
== NULL
)
12123 if (max_sym_count
!= 0)
12125 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
12126 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
12127 if (flinfo
.external_syms
== NULL
)
12130 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
12131 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
12132 if (flinfo
.internal_syms
== NULL
)
12135 amt
= max_sym_count
* sizeof (long);
12136 flinfo
.indices
= (long int *) bfd_malloc (amt
);
12137 if (flinfo
.indices
== NULL
)
12140 amt
= max_sym_count
* sizeof (asection
*);
12141 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
12142 if (flinfo
.sections
== NULL
)
12146 if (max_sym_shndx_count
!= 0)
12148 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
12149 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
12150 if (flinfo
.locsym_shndx
== NULL
)
12156 bfd_vma base
, end
= 0;
12159 for (sec
= htab
->tls_sec
;
12160 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
12163 bfd_size_type size
= sec
->size
;
12166 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
12168 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
12171 size
= ord
->offset
+ ord
->size
;
12173 end
= sec
->vma
+ size
;
12175 base
= htab
->tls_sec
->vma
;
12176 /* Only align end of TLS section if static TLS doesn't have special
12177 alignment requirements. */
12178 if (bed
->static_tls_alignment
== 1)
12179 end
= align_power (end
, htab
->tls_sec
->alignment_power
);
12180 htab
->tls_size
= end
- base
;
12183 /* Reorder SHF_LINK_ORDER sections. */
12184 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12186 if (!elf_fixup_link_order (abfd
, o
))
12190 if (!_bfd_elf_fixup_eh_frame_hdr (info
))
12193 /* Since ELF permits relocations to be against local symbols, we
12194 must have the local symbols available when we do the relocations.
12195 Since we would rather only read the local symbols once, and we
12196 would rather not keep them in memory, we handle all the
12197 relocations for a single input file at the same time.
12199 Unfortunately, there is no way to know the total number of local
12200 symbols until we have seen all of them, and the local symbol
12201 indices precede the global symbol indices. This means that when
12202 we are generating relocatable output, and we see a reloc against
12203 a global symbol, we can not know the symbol index until we have
12204 finished examining all the local symbols to see which ones we are
12205 going to output. To deal with this, we keep the relocations in
12206 memory, and don't output them until the end of the link. This is
12207 an unfortunate waste of memory, but I don't see a good way around
12208 it. Fortunately, it only happens when performing a relocatable
12209 link, which is not the common case. FIXME: If keep_memory is set
12210 we could write the relocs out and then read them again; I don't
12211 know how bad the memory loss will be. */
12213 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
12214 sub
->output_has_begun
= FALSE
;
12215 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12217 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
12219 if (p
->type
== bfd_indirect_link_order
12220 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
12221 == bfd_target_elf_flavour
)
12222 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
12224 if (! sub
->output_has_begun
)
12226 if (! elf_link_input_bfd (&flinfo
, sub
))
12228 sub
->output_has_begun
= TRUE
;
12231 else if (p
->type
== bfd_section_reloc_link_order
12232 || p
->type
== bfd_symbol_reloc_link_order
)
12234 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
12239 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
12241 if (p
->type
== bfd_indirect_link_order
12242 && (bfd_get_flavour (sub
)
12243 == bfd_target_elf_flavour
)
12244 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
12245 != bed
->s
->elfclass
))
12247 const char *iclass
, *oclass
;
12249 switch (bed
->s
->elfclass
)
12251 case ELFCLASS64
: oclass
= "ELFCLASS64"; break;
12252 case ELFCLASS32
: oclass
= "ELFCLASS32"; break;
12253 case ELFCLASSNONE
: oclass
= "ELFCLASSNONE"; break;
12257 switch (elf_elfheader (sub
)->e_ident
[EI_CLASS
])
12259 case ELFCLASS64
: iclass
= "ELFCLASS64"; break;
12260 case ELFCLASS32
: iclass
= "ELFCLASS32"; break;
12261 case ELFCLASSNONE
: iclass
= "ELFCLASSNONE"; break;
12265 bfd_set_error (bfd_error_wrong_format
);
12267 /* xgettext:c-format */
12268 (_("%pB: file class %s incompatible with %s"),
12269 sub
, iclass
, oclass
);
12278 /* Free symbol buffer if needed. */
12279 if (!info
->reduce_memory_overheads
)
12281 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
12282 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
12283 && elf_tdata (sub
)->symbuf
)
12285 free (elf_tdata (sub
)->symbuf
);
12286 elf_tdata (sub
)->symbuf
= NULL
;
12290 /* Output any global symbols that got converted to local in a
12291 version script or due to symbol visibility. We do this in a
12292 separate step since ELF requires all local symbols to appear
12293 prior to any global symbols. FIXME: We should only do this if
12294 some global symbols were, in fact, converted to become local.
12295 FIXME: Will this work correctly with the Irix 5 linker? */
12296 eoinfo
.failed
= FALSE
;
12297 eoinfo
.flinfo
= &flinfo
;
12298 eoinfo
.localsyms
= TRUE
;
12299 eoinfo
.file_sym_done
= FALSE
;
12300 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
12304 /* If backend needs to output some local symbols not present in the hash
12305 table, do it now. */
12306 if (bed
->elf_backend_output_arch_local_syms
12307 && (info
->strip
!= strip_all
|| emit_relocs
))
12309 typedef int (*out_sym_func
)
12310 (void *, const char *, Elf_Internal_Sym
*, asection
*,
12311 struct elf_link_hash_entry
*);
12313 if (! ((*bed
->elf_backend_output_arch_local_syms
)
12314 (abfd
, info
, &flinfo
,
12315 (out_sym_func
) elf_link_output_symstrtab
)))
12319 /* That wrote out all the local symbols. Finish up the symbol table
12320 with the global symbols. Even if we want to strip everything we
12321 can, we still need to deal with those global symbols that got
12322 converted to local in a version script. */
12324 /* The sh_info field records the index of the first non local symbol. */
12325 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
12328 && htab
->dynsym
!= NULL
12329 && htab
->dynsym
->output_section
!= bfd_abs_section_ptr
)
12331 Elf_Internal_Sym sym
;
12332 bfd_byte
*dynsym
= htab
->dynsym
->contents
;
12334 o
= htab
->dynsym
->output_section
;
12335 elf_section_data (o
)->this_hdr
.sh_info
= htab
->local_dynsymcount
+ 1;
12337 /* Write out the section symbols for the output sections. */
12338 if (bfd_link_pic (info
)
12339 || htab
->is_relocatable_executable
)
12345 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
12347 sym
.st_target_internal
= 0;
12349 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
12355 dynindx
= elf_section_data (s
)->dynindx
;
12358 indx
= elf_section_data (s
)->this_idx
;
12359 BFD_ASSERT (indx
> 0);
12360 sym
.st_shndx
= indx
;
12361 if (! check_dynsym (abfd
, &sym
))
12363 sym
.st_value
= s
->vma
;
12364 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
12365 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
12369 /* Write out the local dynsyms. */
12370 if (htab
->dynlocal
)
12372 struct elf_link_local_dynamic_entry
*e
;
12373 for (e
= htab
->dynlocal
; e
; e
= e
->next
)
12378 /* Copy the internal symbol and turn off visibility.
12379 Note that we saved a word of storage and overwrote
12380 the original st_name with the dynstr_index. */
12382 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
12384 s
= bfd_section_from_elf_index (e
->input_bfd
,
12389 elf_section_data (s
->output_section
)->this_idx
;
12390 if (! check_dynsym (abfd
, &sym
))
12392 sym
.st_value
= (s
->output_section
->vma
12394 + e
->isym
.st_value
);
12397 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
12398 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
12403 /* We get the global symbols from the hash table. */
12404 eoinfo
.failed
= FALSE
;
12405 eoinfo
.localsyms
= FALSE
;
12406 eoinfo
.flinfo
= &flinfo
;
12407 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
12411 /* If backend needs to output some symbols not present in the hash
12412 table, do it now. */
12413 if (bed
->elf_backend_output_arch_syms
12414 && (info
->strip
!= strip_all
|| emit_relocs
))
12416 typedef int (*out_sym_func
)
12417 (void *, const char *, Elf_Internal_Sym
*, asection
*,
12418 struct elf_link_hash_entry
*);
12420 if (! ((*bed
->elf_backend_output_arch_syms
)
12421 (abfd
, info
, &flinfo
,
12422 (out_sym_func
) elf_link_output_symstrtab
)))
12426 /* Finalize the .strtab section. */
12427 _bfd_elf_strtab_finalize (flinfo
.symstrtab
);
12429 /* Swap out the .strtab section. */
12430 if (!elf_link_swap_symbols_out (&flinfo
))
12433 /* Now we know the size of the symtab section. */
12434 if (bfd_get_symcount (abfd
) > 0)
12436 /* Finish up and write out the symbol string table (.strtab)
12438 Elf_Internal_Shdr
*symstrtab_hdr
= NULL
;
12439 file_ptr off
= symtab_hdr
->sh_offset
+ symtab_hdr
->sh_size
;
12441 if (elf_symtab_shndx_list (abfd
))
12443 symtab_shndx_hdr
= & elf_symtab_shndx_list (abfd
)->hdr
;
12445 if (symtab_shndx_hdr
!= NULL
&& symtab_shndx_hdr
->sh_name
!= 0)
12447 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
12448 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
12449 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
12450 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
12451 symtab_shndx_hdr
->sh_size
= amt
;
12453 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
12456 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
12457 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
12462 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
12463 /* sh_name was set in prep_headers. */
12464 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
12465 symstrtab_hdr
->sh_flags
= bed
->elf_strtab_flags
;
12466 symstrtab_hdr
->sh_addr
= 0;
12467 symstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (flinfo
.symstrtab
);
12468 symstrtab_hdr
->sh_entsize
= 0;
12469 symstrtab_hdr
->sh_link
= 0;
12470 symstrtab_hdr
->sh_info
= 0;
12471 /* sh_offset is set just below. */
12472 symstrtab_hdr
->sh_addralign
= 1;
12474 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
,
12476 elf_next_file_pos (abfd
) = off
;
12478 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
12479 || ! _bfd_elf_strtab_emit (abfd
, flinfo
.symstrtab
))
12483 if (info
->out_implib_bfd
&& !elf_output_implib (abfd
, info
))
12485 _bfd_error_handler (_("%pB: failed to generate import library"),
12486 info
->out_implib_bfd
);
12490 /* Adjust the relocs to have the correct symbol indices. */
12491 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12493 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
12496 if ((o
->flags
& SEC_RELOC
) == 0)
12499 sort
= bed
->sort_relocs_p
== NULL
|| (*bed
->sort_relocs_p
) (o
);
12500 if (esdo
->rel
.hdr
!= NULL
12501 && !elf_link_adjust_relocs (abfd
, o
, &esdo
->rel
, sort
, info
))
12503 if (esdo
->rela
.hdr
!= NULL
12504 && !elf_link_adjust_relocs (abfd
, o
, &esdo
->rela
, sort
, info
))
12507 /* Set the reloc_count field to 0 to prevent write_relocs from
12508 trying to swap the relocs out itself. */
12509 o
->reloc_count
= 0;
12512 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
12513 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
12515 /* If we are linking against a dynamic object, or generating a
12516 shared library, finish up the dynamic linking information. */
12519 bfd_byte
*dyncon
, *dynconend
;
12521 /* Fix up .dynamic entries. */
12522 o
= bfd_get_linker_section (dynobj
, ".dynamic");
12523 BFD_ASSERT (o
!= NULL
);
12525 dyncon
= o
->contents
;
12526 dynconend
= o
->contents
+ o
->size
;
12527 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
12529 Elf_Internal_Dyn dyn
;
12532 bfd_size_type sh_size
;
12535 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
12542 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
12544 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
12546 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
12547 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
12550 dyn
.d_un
.d_val
= relativecount
;
12557 name
= info
->init_function
;
12560 name
= info
->fini_function
;
12563 struct elf_link_hash_entry
*h
;
12565 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
12567 && (h
->root
.type
== bfd_link_hash_defined
12568 || h
->root
.type
== bfd_link_hash_defweak
))
12570 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
12571 o
= h
->root
.u
.def
.section
;
12572 if (o
->output_section
!= NULL
)
12573 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
12574 + o
->output_offset
);
12577 /* The symbol is imported from another shared
12578 library and does not apply to this one. */
12579 dyn
.d_un
.d_ptr
= 0;
12586 case DT_PREINIT_ARRAYSZ
:
12587 name
= ".preinit_array";
12589 case DT_INIT_ARRAYSZ
:
12590 name
= ".init_array";
12592 case DT_FINI_ARRAYSZ
:
12593 name
= ".fini_array";
12595 o
= bfd_get_section_by_name (abfd
, name
);
12599 (_("could not find section %s"), name
);
12604 (_("warning: %s section has zero size"), name
);
12605 dyn
.d_un
.d_val
= o
->size
;
12608 case DT_PREINIT_ARRAY
:
12609 name
= ".preinit_array";
12611 case DT_INIT_ARRAY
:
12612 name
= ".init_array";
12614 case DT_FINI_ARRAY
:
12615 name
= ".fini_array";
12617 o
= bfd_get_section_by_name (abfd
, name
);
12624 name
= ".gnu.hash";
12633 name
= ".gnu.version_d";
12636 name
= ".gnu.version_r";
12639 name
= ".gnu.version";
12641 o
= bfd_get_linker_section (dynobj
, name
);
12643 if (o
== NULL
|| bfd_is_abs_section (o
->output_section
))
12646 (_("could not find section %s"), name
);
12649 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
12652 (_("warning: section '%s' is being made into a note"), name
);
12653 bfd_set_error (bfd_error_nonrepresentable_section
);
12656 dyn
.d_un
.d_ptr
= o
->output_section
->vma
+ o
->output_offset
;
12663 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
12669 for (i
= 1; i
< elf_numsections (abfd
); i
++)
12671 Elf_Internal_Shdr
*hdr
;
12673 hdr
= elf_elfsections (abfd
)[i
];
12674 if (hdr
->sh_type
== type
12675 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
12677 sh_size
+= hdr
->sh_size
;
12679 || sh_addr
> hdr
->sh_addr
)
12680 sh_addr
= hdr
->sh_addr
;
12684 if (bed
->dtrel_excludes_plt
&& htab
->srelplt
!= NULL
)
12686 /* Don't count procedure linkage table relocs in the
12687 overall reloc count. */
12688 sh_size
-= htab
->srelplt
->size
;
12690 /* If the size is zero, make the address zero too.
12691 This is to avoid a glibc bug. If the backend
12692 emits DT_RELA/DT_RELASZ even when DT_RELASZ is
12693 zero, then we'll put DT_RELA at the end of
12694 DT_JMPREL. glibc will interpret the end of
12695 DT_RELA matching the end of DT_JMPREL as the
12696 case where DT_RELA includes DT_JMPREL, and for
12697 LD_BIND_NOW will decide that processing DT_RELA
12698 will process the PLT relocs too. Net result:
12699 No PLT relocs applied. */
12702 /* If .rela.plt is the first .rela section, exclude
12703 it from DT_RELA. */
12704 else if (sh_addr
== (htab
->srelplt
->output_section
->vma
12705 + htab
->srelplt
->output_offset
))
12706 sh_addr
+= htab
->srelplt
->size
;
12709 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
12710 dyn
.d_un
.d_val
= sh_size
;
12712 dyn
.d_un
.d_ptr
= sh_addr
;
12715 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
12719 /* If we have created any dynamic sections, then output them. */
12720 if (dynobj
!= NULL
)
12722 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
12725 /* Check for DT_TEXTREL (late, in case the backend removes it). */
12726 if (((info
->warn_shared_textrel
&& bfd_link_pic (info
))
12727 || info
->error_textrel
)
12728 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
12730 bfd_byte
*dyncon
, *dynconend
;
12732 dyncon
= o
->contents
;
12733 dynconend
= o
->contents
+ o
->size
;
12734 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
12736 Elf_Internal_Dyn dyn
;
12738 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
12740 if (dyn
.d_tag
== DT_TEXTREL
)
12742 if (info
->error_textrel
)
12743 info
->callbacks
->einfo
12744 (_("%P%X: read-only segment has dynamic relocations\n"));
12746 info
->callbacks
->einfo
12747 (_("%P: warning: creating a DT_TEXTREL in a shared object\n"));
12753 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
12755 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
12757 || o
->output_section
== bfd_abs_section_ptr
)
12759 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
12761 /* At this point, we are only interested in sections
12762 created by _bfd_elf_link_create_dynamic_sections. */
12765 if (htab
->stab_info
.stabstr
== o
)
12767 if (htab
->eh_info
.hdr_sec
== o
)
12769 if (strcmp (o
->name
, ".dynstr") != 0)
12771 if (! bfd_set_section_contents (abfd
, o
->output_section
,
12773 (file_ptr
) o
->output_offset
12774 * bfd_octets_per_byte (abfd
),
12780 /* The contents of the .dynstr section are actually in a
12784 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
12785 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
12786 || !_bfd_elf_strtab_emit (abfd
, htab
->dynstr
))
12792 if (!info
->resolve_section_groups
)
12794 bfd_boolean failed
= FALSE
;
12796 BFD_ASSERT (bfd_link_relocatable (info
));
12797 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
12802 /* If we have optimized stabs strings, output them. */
12803 if (htab
->stab_info
.stabstr
!= NULL
)
12805 if (!_bfd_write_stab_strings (abfd
, &htab
->stab_info
))
12809 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
12812 elf_final_link_free (abfd
, &flinfo
);
12816 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
12817 if (contents
== NULL
)
12818 return FALSE
; /* Bail out and fail. */
12819 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
12820 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
12827 elf_final_link_free (abfd
, &flinfo
);
12831 /* Initialize COOKIE for input bfd ABFD. */
12834 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
12835 struct bfd_link_info
*info
, bfd
*abfd
)
12837 Elf_Internal_Shdr
*symtab_hdr
;
12838 const struct elf_backend_data
*bed
;
12840 bed
= get_elf_backend_data (abfd
);
12841 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12843 cookie
->abfd
= abfd
;
12844 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
12845 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
12846 if (cookie
->bad_symtab
)
12848 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
12849 cookie
->extsymoff
= 0;
12853 cookie
->locsymcount
= symtab_hdr
->sh_info
;
12854 cookie
->extsymoff
= symtab_hdr
->sh_info
;
12857 if (bed
->s
->arch_size
== 32)
12858 cookie
->r_sym_shift
= 8;
12860 cookie
->r_sym_shift
= 32;
12862 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
12863 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
12865 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
12866 cookie
->locsymcount
, 0,
12868 if (cookie
->locsyms
== NULL
)
12870 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
12873 if (info
->keep_memory
)
12874 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
12879 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
12882 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
12884 Elf_Internal_Shdr
*symtab_hdr
;
12886 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12887 if (cookie
->locsyms
!= NULL
12888 && symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
12889 free (cookie
->locsyms
);
12892 /* Initialize the relocation information in COOKIE for input section SEC
12893 of input bfd ABFD. */
12896 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
12897 struct bfd_link_info
*info
, bfd
*abfd
,
12900 if (sec
->reloc_count
== 0)
12902 cookie
->rels
= NULL
;
12903 cookie
->relend
= NULL
;
12907 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
12908 info
->keep_memory
);
12909 if (cookie
->rels
== NULL
)
12911 cookie
->rel
= cookie
->rels
;
12912 cookie
->relend
= cookie
->rels
+ sec
->reloc_count
;
12914 cookie
->rel
= cookie
->rels
;
12918 /* Free the memory allocated by init_reloc_cookie_rels,
12922 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
12925 if (cookie
->rels
&& elf_section_data (sec
)->relocs
!= cookie
->rels
)
12926 free (cookie
->rels
);
12929 /* Initialize the whole of COOKIE for input section SEC. */
12932 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
12933 struct bfd_link_info
*info
,
12936 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
12938 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
12943 fini_reloc_cookie (cookie
, sec
->owner
);
12948 /* Free the memory allocated by init_reloc_cookie_for_section,
12952 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
12955 fini_reloc_cookie_rels (cookie
, sec
);
12956 fini_reloc_cookie (cookie
, sec
->owner
);
12959 /* Garbage collect unused sections. */
12961 /* Default gc_mark_hook. */
12964 _bfd_elf_gc_mark_hook (asection
*sec
,
12965 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12966 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
12967 struct elf_link_hash_entry
*h
,
12968 Elf_Internal_Sym
*sym
)
12972 switch (h
->root
.type
)
12974 case bfd_link_hash_defined
:
12975 case bfd_link_hash_defweak
:
12976 return h
->root
.u
.def
.section
;
12978 case bfd_link_hash_common
:
12979 return h
->root
.u
.c
.p
->section
;
12986 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
12991 /* Return the debug definition section. */
12994 elf_gc_mark_debug_section (asection
*sec ATTRIBUTE_UNUSED
,
12995 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12996 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
12997 struct elf_link_hash_entry
*h
,
12998 Elf_Internal_Sym
*sym
)
13002 /* Return the global debug definition section. */
13003 if ((h
->root
.type
== bfd_link_hash_defined
13004 || h
->root
.type
== bfd_link_hash_defweak
)
13005 && (h
->root
.u
.def
.section
->flags
& SEC_DEBUGGING
) != 0)
13006 return h
->root
.u
.def
.section
;
13010 /* Return the local debug definition section. */
13011 asection
*isec
= bfd_section_from_elf_index (sec
->owner
,
13013 if ((isec
->flags
& SEC_DEBUGGING
) != 0)
13020 /* COOKIE->rel describes a relocation against section SEC, which is
13021 a section we've decided to keep. Return the section that contains
13022 the relocation symbol, or NULL if no section contains it. */
13025 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
13026 elf_gc_mark_hook_fn gc_mark_hook
,
13027 struct elf_reloc_cookie
*cookie
,
13028 bfd_boolean
*start_stop
)
13030 unsigned long r_symndx
;
13031 struct elf_link_hash_entry
*h
;
13033 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
13034 if (r_symndx
== STN_UNDEF
)
13037 if (r_symndx
>= cookie
->locsymcount
13038 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
13040 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
13043 info
->callbacks
->einfo (_("%F%P: corrupt input: %pB\n"),
13047 while (h
->root
.type
== bfd_link_hash_indirect
13048 || h
->root
.type
== bfd_link_hash_warning
)
13049 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
13051 /* If this symbol is weak and there is a non-weak definition, we
13052 keep the non-weak definition because many backends put
13053 dynamic reloc info on the non-weak definition for code
13054 handling copy relocs. */
13055 if (h
->is_weakalias
)
13056 weakdef (h
)->mark
= 1;
13058 if (start_stop
!= NULL
)
13060 /* To work around a glibc bug, mark XXX input sections
13061 when there is a reference to __start_XXX or __stop_XXX
13065 asection
*s
= h
->u2
.start_stop_section
;
13066 *start_stop
= !s
->gc_mark
;
13071 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
13074 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
13075 &cookie
->locsyms
[r_symndx
]);
13078 /* COOKIE->rel describes a relocation against section SEC, which is
13079 a section we've decided to keep. Mark the section that contains
13080 the relocation symbol. */
13083 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
13085 elf_gc_mark_hook_fn gc_mark_hook
,
13086 struct elf_reloc_cookie
*cookie
)
13089 bfd_boolean start_stop
= FALSE
;
13091 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
, &start_stop
);
13092 while (rsec
!= NULL
)
13094 if (!rsec
->gc_mark
)
13096 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
13097 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
13099 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
13104 rsec
= bfd_get_next_section_by_name (rsec
->owner
, rsec
);
13109 /* The mark phase of garbage collection. For a given section, mark
13110 it and any sections in this section's group, and all the sections
13111 which define symbols to which it refers. */
13114 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
13116 elf_gc_mark_hook_fn gc_mark_hook
)
13119 asection
*group_sec
, *eh_frame
;
13123 /* Mark all the sections in the group. */
13124 group_sec
= elf_section_data (sec
)->next_in_group
;
13125 if (group_sec
&& !group_sec
->gc_mark
)
13126 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
13129 /* Look through the section relocs. */
13131 eh_frame
= elf_eh_frame_section (sec
->owner
);
13132 if ((sec
->flags
& SEC_RELOC
) != 0
13133 && sec
->reloc_count
> 0
13134 && sec
!= eh_frame
)
13136 struct elf_reloc_cookie cookie
;
13138 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
13142 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
13143 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
13148 fini_reloc_cookie_for_section (&cookie
, sec
);
13152 if (ret
&& eh_frame
&& elf_fde_list (sec
))
13154 struct elf_reloc_cookie cookie
;
13156 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
13160 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
13161 gc_mark_hook
, &cookie
))
13163 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
13167 eh_frame
= elf_section_eh_frame_entry (sec
);
13168 if (ret
&& eh_frame
&& !eh_frame
->gc_mark
)
13169 if (!_bfd_elf_gc_mark (info
, eh_frame
, gc_mark_hook
))
13175 /* Scan and mark sections in a special or debug section group. */
13178 _bfd_elf_gc_mark_debug_special_section_group (asection
*grp
)
13180 /* Point to first section of section group. */
13182 /* Used to iterate the section group. */
13185 bfd_boolean is_special_grp
= TRUE
;
13186 bfd_boolean is_debug_grp
= TRUE
;
13188 /* First scan to see if group contains any section other than debug
13189 and special section. */
13190 ssec
= msec
= elf_next_in_group (grp
);
13193 if ((msec
->flags
& SEC_DEBUGGING
) == 0)
13194 is_debug_grp
= FALSE
;
13196 if ((msec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) != 0)
13197 is_special_grp
= FALSE
;
13199 msec
= elf_next_in_group (msec
);
13201 while (msec
!= ssec
);
13203 /* If this is a pure debug section group or pure special section group,
13204 keep all sections in this group. */
13205 if (is_debug_grp
|| is_special_grp
)
13210 msec
= elf_next_in_group (msec
);
13212 while (msec
!= ssec
);
13216 /* Keep debug and special sections. */
13219 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
13220 elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED
)
13224 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
13227 bfd_boolean some_kept
;
13228 bfd_boolean debug_frag_seen
;
13229 bfd_boolean has_kept_debug_info
;
13231 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
13233 isec
= ibfd
->sections
;
13234 if (isec
== NULL
|| isec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13237 /* Ensure all linker created sections are kept,
13238 see if any other section is already marked,
13239 and note if we have any fragmented debug sections. */
13240 debug_frag_seen
= some_kept
= has_kept_debug_info
= FALSE
;
13241 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13243 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
13245 else if (isec
->gc_mark
13246 && (isec
->flags
& SEC_ALLOC
) != 0
13247 && elf_section_type (isec
) != SHT_NOTE
)
13250 if (!debug_frag_seen
13251 && (isec
->flags
& SEC_DEBUGGING
)
13252 && CONST_STRNEQ (isec
->name
, ".debug_line."))
13253 debug_frag_seen
= TRUE
;
13256 /* If no non-note alloc section in this file will be kept, then
13257 we can toss out the debug and special sections. */
13261 /* Keep debug and special sections like .comment when they are
13262 not part of a group. Also keep section groups that contain
13263 just debug sections or special sections. */
13264 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13266 if ((isec
->flags
& SEC_GROUP
) != 0)
13267 _bfd_elf_gc_mark_debug_special_section_group (isec
);
13268 else if (((isec
->flags
& SEC_DEBUGGING
) != 0
13269 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0)
13270 && elf_next_in_group (isec
) == NULL
)
13272 if (isec
->gc_mark
&& (isec
->flags
& SEC_DEBUGGING
) != 0)
13273 has_kept_debug_info
= TRUE
;
13276 /* Look for CODE sections which are going to be discarded,
13277 and find and discard any fragmented debug sections which
13278 are associated with that code section. */
13279 if (debug_frag_seen
)
13280 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13281 if ((isec
->flags
& SEC_CODE
) != 0
13282 && isec
->gc_mark
== 0)
13287 ilen
= strlen (isec
->name
);
13289 /* Association is determined by the name of the debug
13290 section containing the name of the code section as
13291 a suffix. For example .debug_line.text.foo is a
13292 debug section associated with .text.foo. */
13293 for (dsec
= ibfd
->sections
; dsec
!= NULL
; dsec
= dsec
->next
)
13297 if (dsec
->gc_mark
== 0
13298 || (dsec
->flags
& SEC_DEBUGGING
) == 0)
13301 dlen
= strlen (dsec
->name
);
13304 && strncmp (dsec
->name
+ (dlen
- ilen
),
13305 isec
->name
, ilen
) == 0)
13310 /* Mark debug sections referenced by kept debug sections. */
13311 if (has_kept_debug_info
)
13312 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13314 && (isec
->flags
& SEC_DEBUGGING
) != 0)
13315 if (!_bfd_elf_gc_mark (info
, isec
,
13316 elf_gc_mark_debug_section
))
13323 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
13326 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13328 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
13332 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
13333 || elf_object_id (sub
) != elf_hash_table_id (elf_hash_table (info
))
13334 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
13337 if (o
== NULL
|| o
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13340 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
13342 /* When any section in a section group is kept, we keep all
13343 sections in the section group. If the first member of
13344 the section group is excluded, we will also exclude the
13346 if (o
->flags
& SEC_GROUP
)
13348 asection
*first
= elf_next_in_group (o
);
13349 o
->gc_mark
= first
->gc_mark
;
13355 /* Skip sweeping sections already excluded. */
13356 if (o
->flags
& SEC_EXCLUDE
)
13359 /* Since this is early in the link process, it is simple
13360 to remove a section from the output. */
13361 o
->flags
|= SEC_EXCLUDE
;
13363 if (info
->print_gc_sections
&& o
->size
!= 0)
13364 /* xgettext:c-format */
13365 _bfd_error_handler (_("removing unused section '%pA' in file '%pB'"),
13373 /* Propagate collected vtable information. This is called through
13374 elf_link_hash_traverse. */
13377 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
13379 /* Those that are not vtables. */
13381 || h
->u2
.vtable
== NULL
13382 || h
->u2
.vtable
->parent
== NULL
)
13385 /* Those vtables that do not have parents, we cannot merge. */
13386 if (h
->u2
.vtable
->parent
== (struct elf_link_hash_entry
*) -1)
13389 /* If we've already been done, exit. */
13390 if (h
->u2
.vtable
->used
&& h
->u2
.vtable
->used
[-1])
13393 /* Make sure the parent's table is up to date. */
13394 elf_gc_propagate_vtable_entries_used (h
->u2
.vtable
->parent
, okp
);
13396 if (h
->u2
.vtable
->used
== NULL
)
13398 /* None of this table's entries were referenced. Re-use the
13400 h
->u2
.vtable
->used
= h
->u2
.vtable
->parent
->u2
.vtable
->used
;
13401 h
->u2
.vtable
->size
= h
->u2
.vtable
->parent
->u2
.vtable
->size
;
13406 bfd_boolean
*cu
, *pu
;
13408 /* Or the parent's entries into ours. */
13409 cu
= h
->u2
.vtable
->used
;
13411 pu
= h
->u2
.vtable
->parent
->u2
.vtable
->used
;
13414 const struct elf_backend_data
*bed
;
13415 unsigned int log_file_align
;
13417 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
13418 log_file_align
= bed
->s
->log_file_align
;
13419 n
= h
->u2
.vtable
->parent
->u2
.vtable
->size
>> log_file_align
;
13434 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
13437 bfd_vma hstart
, hend
;
13438 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
13439 const struct elf_backend_data
*bed
;
13440 unsigned int log_file_align
;
13442 /* Take care of both those symbols that do not describe vtables as
13443 well as those that are not loaded. */
13445 || h
->u2
.vtable
== NULL
13446 || h
->u2
.vtable
->parent
== NULL
)
13449 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
13450 || h
->root
.type
== bfd_link_hash_defweak
);
13452 sec
= h
->root
.u
.def
.section
;
13453 hstart
= h
->root
.u
.def
.value
;
13454 hend
= hstart
+ h
->size
;
13456 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
13458 return *(bfd_boolean
*) okp
= FALSE
;
13459 bed
= get_elf_backend_data (sec
->owner
);
13460 log_file_align
= bed
->s
->log_file_align
;
13462 relend
= relstart
+ sec
->reloc_count
;
13464 for (rel
= relstart
; rel
< relend
; ++rel
)
13465 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
13467 /* If the entry is in use, do nothing. */
13468 if (h
->u2
.vtable
->used
13469 && (rel
->r_offset
- hstart
) < h
->u2
.vtable
->size
)
13471 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
13472 if (h
->u2
.vtable
->used
[entry
])
13475 /* Otherwise, kill it. */
13476 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
13482 /* Mark sections containing dynamically referenced symbols. When
13483 building shared libraries, we must assume that any visible symbol is
13487 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
13489 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
13490 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
13492 if ((h
->root
.type
== bfd_link_hash_defined
13493 || h
->root
.type
== bfd_link_hash_defweak
)
13494 && ((h
->ref_dynamic
&& !h
->forced_local
)
13495 || ((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
13496 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
13497 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
13498 && (!bfd_link_executable (info
)
13499 || info
->gc_keep_exported
13500 || info
->export_dynamic
13503 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
13504 && (h
->versioned
>= versioned
13505 || !bfd_hide_sym_by_version (info
->version_info
,
13506 h
->root
.root
.string
)))))
13507 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
13512 /* Keep all sections containing symbols undefined on the command-line,
13513 and the section containing the entry symbol. */
13516 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
13518 struct bfd_sym_chain
*sym
;
13520 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
13522 struct elf_link_hash_entry
*h
;
13524 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
13525 FALSE
, FALSE
, FALSE
);
13528 && (h
->root
.type
== bfd_link_hash_defined
13529 || h
->root
.type
== bfd_link_hash_defweak
)
13530 && !bfd_is_abs_section (h
->root
.u
.def
.section
)
13531 && !bfd_is_und_section (h
->root
.u
.def
.section
))
13532 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
13537 bfd_elf_parse_eh_frame_entries (bfd
*abfd ATTRIBUTE_UNUSED
,
13538 struct bfd_link_info
*info
)
13540 bfd
*ibfd
= info
->input_bfds
;
13542 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
13545 struct elf_reloc_cookie cookie
;
13547 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
13549 sec
= ibfd
->sections
;
13550 if (sec
== NULL
|| sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13553 if (!init_reloc_cookie (&cookie
, info
, ibfd
))
13556 for (sec
= ibfd
->sections
; sec
; sec
= sec
->next
)
13558 if (CONST_STRNEQ (bfd_section_name (ibfd
, sec
), ".eh_frame_entry")
13559 && init_reloc_cookie_rels (&cookie
, info
, ibfd
, sec
))
13561 _bfd_elf_parse_eh_frame_entry (info
, sec
, &cookie
);
13562 fini_reloc_cookie_rels (&cookie
, sec
);
13569 /* Do mark and sweep of unused sections. */
13572 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
13574 bfd_boolean ok
= TRUE
;
13576 elf_gc_mark_hook_fn gc_mark_hook
;
13577 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13578 struct elf_link_hash_table
*htab
;
13580 if (!bed
->can_gc_sections
13581 || !is_elf_hash_table (info
->hash
))
13583 _bfd_error_handler(_("warning: gc-sections option ignored"));
13587 bed
->gc_keep (info
);
13588 htab
= elf_hash_table (info
);
13590 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
13591 at the .eh_frame section if we can mark the FDEs individually. */
13592 for (sub
= info
->input_bfds
;
13593 info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
&& sub
!= NULL
;
13594 sub
= sub
->link
.next
)
13597 struct elf_reloc_cookie cookie
;
13599 sec
= sub
->sections
;
13600 if (sec
== NULL
|| sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13602 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
13603 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
13605 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
13606 if (elf_section_data (sec
)->sec_info
13607 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
13608 elf_eh_frame_section (sub
) = sec
;
13609 fini_reloc_cookie_for_section (&cookie
, sec
);
13610 sec
= bfd_get_next_section_by_name (NULL
, sec
);
13614 /* Apply transitive closure to the vtable entry usage info. */
13615 elf_link_hash_traverse (htab
, elf_gc_propagate_vtable_entries_used
, &ok
);
13619 /* Kill the vtable relocations that were not used. */
13620 elf_link_hash_traverse (htab
, elf_gc_smash_unused_vtentry_relocs
, &ok
);
13624 /* Mark dynamically referenced symbols. */
13625 if (htab
->dynamic_sections_created
|| info
->gc_keep_exported
)
13626 elf_link_hash_traverse (htab
, bed
->gc_mark_dynamic_ref
, info
);
13628 /* Grovel through relocs to find out who stays ... */
13629 gc_mark_hook
= bed
->gc_mark_hook
;
13630 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
13634 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
13635 || elf_object_id (sub
) != elf_hash_table_id (htab
)
13636 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
13640 if (o
== NULL
|| o
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13643 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
13644 Also treat note sections as a root, if the section is not part
13645 of a group. We must keep all PREINIT_ARRAY, INIT_ARRAY as
13646 well as FINI_ARRAY sections for ld -r. */
13647 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
13649 && (o
->flags
& SEC_EXCLUDE
) == 0
13650 && ((o
->flags
& SEC_KEEP
) != 0
13651 || (bfd_link_relocatable (info
)
13652 && ((elf_section_data (o
)->this_hdr
.sh_type
13653 == SHT_PREINIT_ARRAY
)
13654 || (elf_section_data (o
)->this_hdr
.sh_type
13656 || (elf_section_data (o
)->this_hdr
.sh_type
13657 == SHT_FINI_ARRAY
)))
13658 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
13659 && elf_next_in_group (o
) == NULL
)))
13661 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
13666 /* Allow the backend to mark additional target specific sections. */
13667 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
13669 /* ... and mark SEC_EXCLUDE for those that go. */
13670 return elf_gc_sweep (abfd
, info
);
13673 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
13676 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
13678 struct elf_link_hash_entry
*h
,
13681 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
13682 struct elf_link_hash_entry
**search
, *child
;
13683 size_t extsymcount
;
13684 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13686 /* The sh_info field of the symtab header tells us where the
13687 external symbols start. We don't care about the local symbols at
13689 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
13690 if (!elf_bad_symtab (abfd
))
13691 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
13693 sym_hashes
= elf_sym_hashes (abfd
);
13694 sym_hashes_end
= sym_hashes
+ extsymcount
;
13696 /* Hunt down the child symbol, which is in this section at the same
13697 offset as the relocation. */
13698 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
13700 if ((child
= *search
) != NULL
13701 && (child
->root
.type
== bfd_link_hash_defined
13702 || child
->root
.type
== bfd_link_hash_defweak
)
13703 && child
->root
.u
.def
.section
== sec
13704 && child
->root
.u
.def
.value
== offset
)
13708 /* xgettext:c-format */
13709 _bfd_error_handler (_("%pB: %pA+%#" PRIx64
": no symbol found for INHERIT"),
13710 abfd
, sec
, (uint64_t) offset
);
13711 bfd_set_error (bfd_error_invalid_operation
);
13715 if (!child
->u2
.vtable
)
13717 child
->u2
.vtable
= ((struct elf_link_virtual_table_entry
*)
13718 bfd_zalloc (abfd
, sizeof (*child
->u2
.vtable
)));
13719 if (!child
->u2
.vtable
)
13724 /* This *should* only be the absolute section. It could potentially
13725 be that someone has defined a non-global vtable though, which
13726 would be bad. It isn't worth paging in the local symbols to be
13727 sure though; that case should simply be handled by the assembler. */
13729 child
->u2
.vtable
->parent
= (struct elf_link_hash_entry
*) -1;
13732 child
->u2
.vtable
->parent
= h
;
13737 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
13740 bfd_elf_gc_record_vtentry (bfd
*abfd
, asection
*sec
,
13741 struct elf_link_hash_entry
*h
,
13744 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13745 unsigned int log_file_align
= bed
->s
->log_file_align
;
13749 /* xgettext:c-format */
13750 _bfd_error_handler (_("%pB: section '%pA': corrupt VTENTRY entry"),
13752 bfd_set_error (bfd_error_bad_value
);
13758 h
->u2
.vtable
= ((struct elf_link_virtual_table_entry
*)
13759 bfd_zalloc (abfd
, sizeof (*h
->u2
.vtable
)));
13764 if (addend
>= h
->u2
.vtable
->size
)
13766 size_t size
, bytes
, file_align
;
13767 bfd_boolean
*ptr
= h
->u2
.vtable
->used
;
13769 /* While the symbol is undefined, we have to be prepared to handle
13771 file_align
= 1 << log_file_align
;
13772 if (h
->root
.type
== bfd_link_hash_undefined
)
13773 size
= addend
+ file_align
;
13777 if (addend
>= size
)
13779 /* Oops! We've got a reference past the defined end of
13780 the table. This is probably a bug -- shall we warn? */
13781 size
= addend
+ file_align
;
13784 size
= (size
+ file_align
- 1) & -file_align
;
13786 /* Allocate one extra entry for use as a "done" flag for the
13787 consolidation pass. */
13788 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
13792 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
13798 oldbytes
= (((h
->u2
.vtable
->size
>> log_file_align
) + 1)
13799 * sizeof (bfd_boolean
));
13800 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
13804 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
13809 /* And arrange for that done flag to be at index -1. */
13810 h
->u2
.vtable
->used
= ptr
+ 1;
13811 h
->u2
.vtable
->size
= size
;
13814 h
->u2
.vtable
->used
[addend
>> log_file_align
] = TRUE
;
13819 /* Map an ELF section header flag to its corresponding string. */
13823 flagword flag_value
;
13824 } elf_flags_to_name_table
;
13826 static elf_flags_to_name_table elf_flags_to_names
[] =
13828 { "SHF_WRITE", SHF_WRITE
},
13829 { "SHF_ALLOC", SHF_ALLOC
},
13830 { "SHF_EXECINSTR", SHF_EXECINSTR
},
13831 { "SHF_MERGE", SHF_MERGE
},
13832 { "SHF_STRINGS", SHF_STRINGS
},
13833 { "SHF_INFO_LINK", SHF_INFO_LINK
},
13834 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
13835 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
13836 { "SHF_GROUP", SHF_GROUP
},
13837 { "SHF_TLS", SHF_TLS
},
13838 { "SHF_MASKOS", SHF_MASKOS
},
13839 { "SHF_EXCLUDE", SHF_EXCLUDE
},
13842 /* Returns TRUE if the section is to be included, otherwise FALSE. */
13844 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
13845 struct flag_info
*flaginfo
,
13848 const bfd_vma sh_flags
= elf_section_flags (section
);
13850 if (!flaginfo
->flags_initialized
)
13852 bfd
*obfd
= info
->output_bfd
;
13853 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
13854 struct flag_info_list
*tf
= flaginfo
->flag_list
;
13856 int without_hex
= 0;
13858 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
13861 flagword (*lookup
) (char *);
13863 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
13864 if (lookup
!= NULL
)
13866 flagword hexval
= (*lookup
) ((char *) tf
->name
);
13870 if (tf
->with
== with_flags
)
13871 with_hex
|= hexval
;
13872 else if (tf
->with
== without_flags
)
13873 without_hex
|= hexval
;
13878 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
13880 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
13882 if (tf
->with
== with_flags
)
13883 with_hex
|= elf_flags_to_names
[i
].flag_value
;
13884 else if (tf
->with
== without_flags
)
13885 without_hex
|= elf_flags_to_names
[i
].flag_value
;
13892 info
->callbacks
->einfo
13893 (_("unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
13897 flaginfo
->flags_initialized
= TRUE
;
13898 flaginfo
->only_with_flags
|= with_hex
;
13899 flaginfo
->not_with_flags
|= without_hex
;
13902 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
13905 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
13911 struct alloc_got_off_arg
{
13913 struct bfd_link_info
*info
;
13916 /* We need a special top-level link routine to convert got reference counts
13917 to real got offsets. */
13920 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
13922 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
13923 bfd
*obfd
= gofarg
->info
->output_bfd
;
13924 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
13926 if (h
->got
.refcount
> 0)
13928 h
->got
.offset
= gofarg
->gotoff
;
13929 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
13932 h
->got
.offset
= (bfd_vma
) -1;
13937 /* And an accompanying bit to work out final got entry offsets once
13938 we're done. Should be called from final_link. */
13941 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
13942 struct bfd_link_info
*info
)
13945 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13947 struct alloc_got_off_arg gofarg
;
13949 BFD_ASSERT (abfd
== info
->output_bfd
);
13951 if (! is_elf_hash_table (info
->hash
))
13954 /* The GOT offset is relative to the .got section, but the GOT header is
13955 put into the .got.plt section, if the backend uses it. */
13956 if (bed
->want_got_plt
)
13959 gotoff
= bed
->got_header_size
;
13961 /* Do the local .got entries first. */
13962 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
13964 bfd_signed_vma
*local_got
;
13965 size_t j
, locsymcount
;
13966 Elf_Internal_Shdr
*symtab_hdr
;
13968 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
13971 local_got
= elf_local_got_refcounts (i
);
13975 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
13976 if (elf_bad_symtab (i
))
13977 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
13979 locsymcount
= symtab_hdr
->sh_info
;
13981 for (j
= 0; j
< locsymcount
; ++j
)
13983 if (local_got
[j
] > 0)
13985 local_got
[j
] = gotoff
;
13986 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
13989 local_got
[j
] = (bfd_vma
) -1;
13993 /* Then the global .got entries. .plt refcounts are handled by
13994 adjust_dynamic_symbol */
13995 gofarg
.gotoff
= gotoff
;
13996 gofarg
.info
= info
;
13997 elf_link_hash_traverse (elf_hash_table (info
),
13998 elf_gc_allocate_got_offsets
,
14003 /* Many folk need no more in the way of final link than this, once
14004 got entry reference counting is enabled. */
14007 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
14009 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
14012 /* Invoke the regular ELF backend linker to do all the work. */
14013 return bfd_elf_final_link (abfd
, info
);
14017 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
14019 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
14021 if (rcookie
->bad_symtab
)
14022 rcookie
->rel
= rcookie
->rels
;
14024 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
14026 unsigned long r_symndx
;
14028 if (! rcookie
->bad_symtab
)
14029 if (rcookie
->rel
->r_offset
> offset
)
14031 if (rcookie
->rel
->r_offset
!= offset
)
14034 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
14035 if (r_symndx
== STN_UNDEF
)
14038 if (r_symndx
>= rcookie
->locsymcount
14039 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
14041 struct elf_link_hash_entry
*h
;
14043 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
14045 while (h
->root
.type
== bfd_link_hash_indirect
14046 || h
->root
.type
== bfd_link_hash_warning
)
14047 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14049 if ((h
->root
.type
== bfd_link_hash_defined
14050 || h
->root
.type
== bfd_link_hash_defweak
)
14051 && (h
->root
.u
.def
.section
->owner
!= rcookie
->abfd
14052 || h
->root
.u
.def
.section
->kept_section
!= NULL
14053 || discarded_section (h
->root
.u
.def
.section
)))
14058 /* It's not a relocation against a global symbol,
14059 but it could be a relocation against a local
14060 symbol for a discarded section. */
14062 Elf_Internal_Sym
*isym
;
14064 /* Need to: get the symbol; get the section. */
14065 isym
= &rcookie
->locsyms
[r_symndx
];
14066 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
14068 && (isec
->kept_section
!= NULL
14069 || discarded_section (isec
)))
14077 /* Discard unneeded references to discarded sections.
14078 Returns -1 on error, 1 if any section's size was changed, 0 if
14079 nothing changed. This function assumes that the relocations are in
14080 sorted order, which is true for all known assemblers. */
14083 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
14085 struct elf_reloc_cookie cookie
;
14090 if (info
->traditional_format
14091 || !is_elf_hash_table (info
->hash
))
14094 o
= bfd_get_section_by_name (output_bfd
, ".stab");
14099 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
14102 || i
->reloc_count
== 0
14103 || i
->sec_info_type
!= SEC_INFO_TYPE_STABS
)
14107 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14110 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
14113 if (_bfd_discard_section_stabs (abfd
, i
,
14114 elf_section_data (i
)->sec_info
,
14115 bfd_elf_reloc_symbol_deleted_p
,
14119 fini_reloc_cookie_for_section (&cookie
, i
);
14124 if (info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
)
14125 o
= bfd_get_section_by_name (output_bfd
, ".eh_frame");
14129 int eh_changed
= 0;
14130 unsigned int eh_alignment
;
14132 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
14138 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14141 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
14144 _bfd_elf_parse_eh_frame (abfd
, info
, i
, &cookie
);
14145 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, i
,
14146 bfd_elf_reloc_symbol_deleted_p
,
14150 if (i
->size
!= i
->rawsize
)
14154 fini_reloc_cookie_for_section (&cookie
, i
);
14157 eh_alignment
= 1 << o
->alignment_power
;
14158 /* Skip over zero terminator, and prevent empty sections from
14159 adding alignment padding at the end. */
14160 for (i
= o
->map_tail
.s
; i
!= NULL
; i
= i
->map_tail
.s
)
14162 i
->flags
|= SEC_EXCLUDE
;
14163 else if (i
->size
> 4)
14165 /* The last non-empty eh_frame section doesn't need padding. */
14168 /* Any prior sections must pad the last FDE out to the output
14169 section alignment. Otherwise we might have zero padding
14170 between sections, which would be seen as a terminator. */
14171 for (; i
!= NULL
; i
= i
->map_tail
.s
)
14173 /* All but the last zero terminator should have been removed. */
14178 = (i
->size
+ eh_alignment
- 1) & -eh_alignment
;
14179 if (i
->size
!= size
)
14187 elf_link_hash_traverse (elf_hash_table (info
),
14188 _bfd_elf_adjust_eh_frame_global_symbol
, NULL
);
14191 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link
.next
)
14193 const struct elf_backend_data
*bed
;
14196 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14198 s
= abfd
->sections
;
14199 if (s
== NULL
|| s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
14202 bed
= get_elf_backend_data (abfd
);
14204 if (bed
->elf_backend_discard_info
!= NULL
)
14206 if (!init_reloc_cookie (&cookie
, info
, abfd
))
14209 if ((*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
14212 fini_reloc_cookie (&cookie
, abfd
);
14216 if (info
->eh_frame_hdr_type
== COMPACT_EH_HDR
)
14217 _bfd_elf_end_eh_frame_parsing (info
);
14219 if (info
->eh_frame_hdr_type
14220 && !bfd_link_relocatable (info
)
14221 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
14228 _bfd_elf_section_already_linked (bfd
*abfd
,
14230 struct bfd_link_info
*info
)
14233 const char *name
, *key
;
14234 struct bfd_section_already_linked
*l
;
14235 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
14237 if (sec
->output_section
== bfd_abs_section_ptr
)
14240 flags
= sec
->flags
;
14242 /* Return if it isn't a linkonce section. A comdat group section
14243 also has SEC_LINK_ONCE set. */
14244 if ((flags
& SEC_LINK_ONCE
) == 0)
14247 /* Don't put group member sections on our list of already linked
14248 sections. They are handled as a group via their group section. */
14249 if (elf_sec_group (sec
) != NULL
)
14252 /* For a SHT_GROUP section, use the group signature as the key. */
14254 if ((flags
& SEC_GROUP
) != 0
14255 && elf_next_in_group (sec
) != NULL
14256 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
14257 key
= elf_group_name (elf_next_in_group (sec
));
14260 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
14261 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
14262 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
14265 /* Must be a user linkonce section that doesn't follow gcc's
14266 naming convention. In this case we won't be matching
14267 single member groups. */
14271 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
14273 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14275 /* We may have 2 different types of sections on the list: group
14276 sections with a signature of <key> (<key> is some string),
14277 and linkonce sections named .gnu.linkonce.<type>.<key>.
14278 Match like sections. LTO plugin sections are an exception.
14279 They are always named .gnu.linkonce.t.<key> and match either
14280 type of section. */
14281 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
14282 && ((flags
& SEC_GROUP
) != 0
14283 || strcmp (name
, l
->sec
->name
) == 0))
14284 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0)
14286 /* The section has already been linked. See if we should
14287 issue a warning. */
14288 if (!_bfd_handle_already_linked (sec
, l
, info
))
14291 if (flags
& SEC_GROUP
)
14293 asection
*first
= elf_next_in_group (sec
);
14294 asection
*s
= first
;
14298 s
->output_section
= bfd_abs_section_ptr
;
14299 /* Record which group discards it. */
14300 s
->kept_section
= l
->sec
;
14301 s
= elf_next_in_group (s
);
14302 /* These lists are circular. */
14312 /* A single member comdat group section may be discarded by a
14313 linkonce section and vice versa. */
14314 if ((flags
& SEC_GROUP
) != 0)
14316 asection
*first
= elf_next_in_group (sec
);
14318 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
14319 /* Check this single member group against linkonce sections. */
14320 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14321 if ((l
->sec
->flags
& SEC_GROUP
) == 0
14322 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
14324 first
->output_section
= bfd_abs_section_ptr
;
14325 first
->kept_section
= l
->sec
;
14326 sec
->output_section
= bfd_abs_section_ptr
;
14331 /* Check this linkonce section against single member groups. */
14332 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14333 if (l
->sec
->flags
& SEC_GROUP
)
14335 asection
*first
= elf_next_in_group (l
->sec
);
14338 && elf_next_in_group (first
) == first
14339 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
14341 sec
->output_section
= bfd_abs_section_ptr
;
14342 sec
->kept_section
= first
;
14347 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
14348 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
14349 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
14350 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
14351 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
14352 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
14353 `.gnu.linkonce.t.F' section from a different bfd not requiring any
14354 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
14355 The reverse order cannot happen as there is never a bfd with only the
14356 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
14357 matter as here were are looking only for cross-bfd sections. */
14359 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
14360 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14361 if ((l
->sec
->flags
& SEC_GROUP
) == 0
14362 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
14364 if (abfd
!= l
->sec
->owner
)
14365 sec
->output_section
= bfd_abs_section_ptr
;
14369 /* This is the first section with this name. Record it. */
14370 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
14371 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
14372 return sec
->output_section
== bfd_abs_section_ptr
;
14376 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
14378 return sym
->st_shndx
== SHN_COMMON
;
14382 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
14388 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
14390 return bfd_com_section_ptr
;
14394 _bfd_elf_default_got_elt_size (bfd
*abfd
,
14395 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
14396 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
14397 bfd
*ibfd ATTRIBUTE_UNUSED
,
14398 unsigned long symndx ATTRIBUTE_UNUSED
)
14400 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14401 return bed
->s
->arch_size
/ 8;
14404 /* Routines to support the creation of dynamic relocs. */
14406 /* Returns the name of the dynamic reloc section associated with SEC. */
14408 static const char *
14409 get_dynamic_reloc_section_name (bfd
* abfd
,
14411 bfd_boolean is_rela
)
14414 const char *old_name
= bfd_get_section_name (NULL
, sec
);
14415 const char *prefix
= is_rela
? ".rela" : ".rel";
14417 if (old_name
== NULL
)
14420 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
14421 sprintf (name
, "%s%s", prefix
, old_name
);
14426 /* Returns the dynamic reloc section associated with SEC.
14427 If necessary compute the name of the dynamic reloc section based
14428 on SEC's name (looked up in ABFD's string table) and the setting
14432 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
14434 bfd_boolean is_rela
)
14436 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
14438 if (reloc_sec
== NULL
)
14440 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
14444 reloc_sec
= bfd_get_linker_section (abfd
, name
);
14446 if (reloc_sec
!= NULL
)
14447 elf_section_data (sec
)->sreloc
= reloc_sec
;
14454 /* Returns the dynamic reloc section associated with SEC. If the
14455 section does not exist it is created and attached to the DYNOBJ
14456 bfd and stored in the SRELOC field of SEC's elf_section_data
14459 ALIGNMENT is the alignment for the newly created section and
14460 IS_RELA defines whether the name should be .rela.<SEC's name>
14461 or .rel.<SEC's name>. The section name is looked up in the
14462 string table associated with ABFD. */
14465 _bfd_elf_make_dynamic_reloc_section (asection
*sec
,
14467 unsigned int alignment
,
14469 bfd_boolean is_rela
)
14471 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
14473 if (reloc_sec
== NULL
)
14475 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
14480 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
14482 if (reloc_sec
== NULL
)
14484 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
14485 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
14486 if ((sec
->flags
& SEC_ALLOC
) != 0)
14487 flags
|= SEC_ALLOC
| SEC_LOAD
;
14489 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
14490 if (reloc_sec
!= NULL
)
14492 /* _bfd_elf_get_sec_type_attr chooses a section type by
14493 name. Override as it may be wrong, eg. for a user
14494 section named "auto" we'll get ".relauto" which is
14495 seen to be a .rela section. */
14496 elf_section_type (reloc_sec
) = is_rela
? SHT_RELA
: SHT_REL
;
14497 if (! bfd_set_section_alignment (dynobj
, reloc_sec
, alignment
))
14502 elf_section_data (sec
)->sreloc
= reloc_sec
;
14508 /* Copy the ELF symbol type and other attributes for a linker script
14509 assignment from HSRC to HDEST. Generally this should be treated as
14510 if we found a strong non-dynamic definition for HDEST (except that
14511 ld ignores multiple definition errors). */
14513 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd
,
14514 struct bfd_link_hash_entry
*hdest
,
14515 struct bfd_link_hash_entry
*hsrc
)
14517 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*) hdest
;
14518 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*) hsrc
;
14519 Elf_Internal_Sym isym
;
14521 ehdest
->type
= ehsrc
->type
;
14522 ehdest
->target_internal
= ehsrc
->target_internal
;
14524 isym
.st_other
= ehsrc
->other
;
14525 elf_merge_st_other (abfd
, ehdest
, &isym
, NULL
, TRUE
, FALSE
);
14528 /* Append a RELA relocation REL to section S in BFD. */
14531 elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
14533 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14534 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
14535 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
14536 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
14539 /* Append a REL relocation REL to section S in BFD. */
14542 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
14544 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14545 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
14546 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
14547 bed
->s
->swap_reloc_out (abfd
, rel
, loc
);
14550 /* Define __start, __stop, .startof. or .sizeof. symbol. */
14552 struct bfd_link_hash_entry
*
14553 bfd_elf_define_start_stop (struct bfd_link_info
*info
,
14554 const char *symbol
, asection
*sec
)
14556 struct elf_link_hash_entry
*h
;
14558 h
= elf_link_hash_lookup (elf_hash_table (info
), symbol
,
14559 FALSE
, FALSE
, TRUE
);
14561 && (h
->root
.type
== bfd_link_hash_undefined
14562 || h
->root
.type
== bfd_link_hash_undefweak
14563 || ((h
->ref_regular
|| h
->def_dynamic
) && !h
->def_regular
)))
14565 bfd_boolean was_dynamic
= h
->ref_dynamic
|| h
->def_dynamic
;
14566 h
->root
.type
= bfd_link_hash_defined
;
14567 h
->root
.u
.def
.section
= sec
;
14568 h
->root
.u
.def
.value
= 0;
14569 h
->def_regular
= 1;
14570 h
->def_dynamic
= 0;
14572 h
->u2
.start_stop_section
= sec
;
14573 if (symbol
[0] == '.')
14575 /* .startof. and .sizeof. symbols are local. */
14576 const struct elf_backend_data
*bed
;
14577 bed
= get_elf_backend_data (info
->output_bfd
);
14578 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
14582 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
14583 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_PROTECTED
;
14585 bfd_elf_link_record_dynamic_symbol (info
, h
);