1 /* ELF linking support for BFD.
2 Copyright (C) 1995-2021 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"
42 /* This struct is used to pass information to routines called via
43 elf_link_hash_traverse which must return failure. */
45 struct elf_info_failed
47 struct bfd_link_info
*info
;
51 /* This structure is used to pass information to
52 _bfd_elf_link_find_version_dependencies. */
54 struct elf_find_verdep_info
56 /* General link information. */
57 struct bfd_link_info
*info
;
58 /* The number of dependencies. */
60 /* Whether we had a failure. */
64 static bfd_boolean _bfd_elf_fix_symbol_flags
65 (struct elf_link_hash_entry
*, struct elf_info_failed
*);
68 _bfd_elf_section_for_symbol (struct elf_reloc_cookie
*cookie
,
69 unsigned long r_symndx
,
72 if (r_symndx
>= cookie
->locsymcount
73 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
75 struct elf_link_hash_entry
*h
;
77 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
79 while (h
->root
.type
== bfd_link_hash_indirect
80 || h
->root
.type
== bfd_link_hash_warning
)
81 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
83 if ((h
->root
.type
== bfd_link_hash_defined
84 || h
->root
.type
== bfd_link_hash_defweak
)
85 && discarded_section (h
->root
.u
.def
.section
))
86 return h
->root
.u
.def
.section
;
92 /* It's not a relocation against a global symbol,
93 but it could be a relocation against a local
94 symbol for a discarded section. */
96 Elf_Internal_Sym
*isym
;
98 /* Need to: get the symbol; get the section. */
99 isym
= &cookie
->locsyms
[r_symndx
];
100 isec
= bfd_section_from_elf_index (cookie
->abfd
, isym
->st_shndx
);
102 && discard
? discarded_section (isec
) : 1)
108 /* Define a symbol in a dynamic linkage section. */
110 struct elf_link_hash_entry
*
111 _bfd_elf_define_linkage_sym (bfd
*abfd
,
112 struct bfd_link_info
*info
,
116 struct elf_link_hash_entry
*h
;
117 struct bfd_link_hash_entry
*bh
;
118 const struct elf_backend_data
*bed
;
120 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, FALSE
);
123 /* Zap symbol defined in an as-needed lib that wasn't linked.
124 This is a symptom of a larger problem: Absolute symbols
125 defined in shared libraries can't be overridden, because we
126 lose the link to the bfd which is via the symbol section. */
127 h
->root
.type
= bfd_link_hash_new
;
133 bed
= get_elf_backend_data (abfd
);
134 if (!_bfd_generic_link_add_one_symbol (info
, abfd
, name
, BSF_GLOBAL
,
135 sec
, 0, NULL
, FALSE
, bed
->collect
,
138 h
= (struct elf_link_hash_entry
*) bh
;
139 BFD_ASSERT (h
!= NULL
);
142 h
->root
.linker_def
= 1;
143 h
->type
= STT_OBJECT
;
144 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
145 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
147 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
152 _bfd_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
156 struct elf_link_hash_entry
*h
;
157 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
158 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
160 /* This function may be called more than once. */
161 if (htab
->sgot
!= NULL
)
164 flags
= bed
->dynamic_sec_flags
;
166 s
= bfd_make_section_anyway_with_flags (abfd
,
167 (bed
->rela_plts_and_copies_p
168 ? ".rela.got" : ".rel.got"),
169 (bed
->dynamic_sec_flags
172 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
176 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
178 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
182 if (bed
->want_got_plt
)
184 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
186 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
191 /* The first bit of the global offset table is the header. */
192 s
->size
+= bed
->got_header_size
;
194 if (bed
->want_got_sym
)
196 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
197 (or .got.plt) section. We don't do this in the linker script
198 because we don't want to define the symbol if we are not creating
199 a global offset table. */
200 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
201 "_GLOBAL_OFFSET_TABLE_");
202 elf_hash_table (info
)->hgot
= h
;
210 /* Create a strtab to hold the dynamic symbol names. */
212 _bfd_elf_link_create_dynstrtab (bfd
*abfd
, struct bfd_link_info
*info
)
214 struct elf_link_hash_table
*hash_table
;
216 hash_table
= elf_hash_table (info
);
217 if (hash_table
->dynobj
== NULL
)
219 /* We may not set dynobj, an input file holding linker created
220 dynamic sections to abfd, which may be a dynamic object with
221 its own dynamic sections. We need to find a normal input file
222 to hold linker created sections if possible. */
223 if ((abfd
->flags
& (DYNAMIC
| BFD_PLUGIN
)) != 0)
227 for (ibfd
= info
->input_bfds
; ibfd
; ibfd
= ibfd
->link
.next
)
229 & (DYNAMIC
| BFD_LINKER_CREATED
| BFD_PLUGIN
)) == 0
230 && bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
231 && elf_object_id (ibfd
) == elf_hash_table_id (hash_table
)
232 && !((s
= ibfd
->sections
) != NULL
233 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
))
239 hash_table
->dynobj
= abfd
;
242 if (hash_table
->dynstr
== NULL
)
244 hash_table
->dynstr
= _bfd_elf_strtab_init ();
245 if (hash_table
->dynstr
== NULL
)
251 /* Create some sections which will be filled in with dynamic linking
252 information. ABFD is an input file which requires dynamic sections
253 to be created. The dynamic sections take up virtual memory space
254 when the final executable is run, so we need to create them before
255 addresses are assigned to the output sections. We work out the
256 actual contents and size of these sections later. */
259 _bfd_elf_link_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
263 const struct elf_backend_data
*bed
;
264 struct elf_link_hash_entry
*h
;
266 if (! is_elf_hash_table (info
->hash
))
269 if (elf_hash_table (info
)->dynamic_sections_created
)
272 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
275 abfd
= elf_hash_table (info
)->dynobj
;
276 bed
= get_elf_backend_data (abfd
);
278 flags
= bed
->dynamic_sec_flags
;
280 /* A dynamically linked executable has a .interp section, but a
281 shared library does not. */
282 if (bfd_link_executable (info
) && !info
->nointerp
)
284 s
= bfd_make_section_anyway_with_flags (abfd
, ".interp",
285 flags
| SEC_READONLY
);
290 /* Create sections to hold version informations. These are removed
291 if they are not needed. */
292 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_d",
293 flags
| SEC_READONLY
);
295 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
298 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version",
299 flags
| SEC_READONLY
);
301 || !bfd_set_section_alignment (s
, 1))
304 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_r",
305 flags
| SEC_READONLY
);
307 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
310 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynsym",
311 flags
| SEC_READONLY
);
313 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
315 elf_hash_table (info
)->dynsym
= s
;
317 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynstr",
318 flags
| SEC_READONLY
);
322 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynamic", flags
);
324 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
327 /* The special symbol _DYNAMIC is always set to the start of the
328 .dynamic section. We could set _DYNAMIC in a linker script, but we
329 only want to define it if we are, in fact, creating a .dynamic
330 section. We don't want to define it if there is no .dynamic
331 section, since on some ELF platforms the start up code examines it
332 to decide how to initialize the process. */
333 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "_DYNAMIC");
334 elf_hash_table (info
)->hdynamic
= h
;
340 s
= bfd_make_section_anyway_with_flags (abfd
, ".hash",
341 flags
| SEC_READONLY
);
343 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
345 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
348 if (info
->emit_gnu_hash
&& bed
->record_xhash_symbol
== NULL
)
350 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.hash",
351 flags
| SEC_READONLY
);
353 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
355 /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section:
356 4 32-bit words followed by variable count of 64-bit words, then
357 variable count of 32-bit words. */
358 if (bed
->s
->arch_size
== 64)
359 elf_section_data (s
)->this_hdr
.sh_entsize
= 0;
361 elf_section_data (s
)->this_hdr
.sh_entsize
= 4;
364 /* Let the backend create the rest of the sections. This lets the
365 backend set the right flags. The backend will normally create
366 the .got and .plt sections. */
367 if (bed
->elf_backend_create_dynamic_sections
== NULL
368 || ! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
371 elf_hash_table (info
)->dynamic_sections_created
= TRUE
;
376 /* Create dynamic sections when linking against a dynamic object. */
379 _bfd_elf_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
381 flagword flags
, pltflags
;
382 struct elf_link_hash_entry
*h
;
384 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
385 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
387 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
388 .rel[a].bss sections. */
389 flags
= bed
->dynamic_sec_flags
;
392 if (bed
->plt_not_loaded
)
393 /* We do not clear SEC_ALLOC here because we still want the OS to
394 allocate space for the section; it's just that there's nothing
395 to read in from the object file. */
396 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
398 pltflags
|= SEC_ALLOC
| SEC_CODE
| SEC_LOAD
;
399 if (bed
->plt_readonly
)
400 pltflags
|= SEC_READONLY
;
402 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
404 || !bfd_set_section_alignment (s
, bed
->plt_alignment
))
408 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
410 if (bed
->want_plt_sym
)
412 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
413 "_PROCEDURE_LINKAGE_TABLE_");
414 elf_hash_table (info
)->hplt
= h
;
419 s
= bfd_make_section_anyway_with_flags (abfd
,
420 (bed
->rela_plts_and_copies_p
421 ? ".rela.plt" : ".rel.plt"),
422 flags
| SEC_READONLY
);
424 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
428 if (! _bfd_elf_create_got_section (abfd
, info
))
431 if (bed
->want_dynbss
)
433 /* The .dynbss section is a place to put symbols which are defined
434 by dynamic objects, are referenced by regular objects, and are
435 not functions. We must allocate space for them in the process
436 image and use a R_*_COPY reloc to tell the dynamic linker to
437 initialize them at run time. The linker script puts the .dynbss
438 section into the .bss section of the final image. */
439 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
440 SEC_ALLOC
| SEC_LINKER_CREATED
);
445 if (bed
->want_dynrelro
)
447 /* Similarly, but for symbols that were originally in read-only
448 sections. This section doesn't really need to have contents,
449 but make it like other .data.rel.ro sections. */
450 s
= bfd_make_section_anyway_with_flags (abfd
, ".data.rel.ro",
457 /* The .rel[a].bss section holds copy relocs. This section is not
458 normally needed. We need to create it here, though, so that the
459 linker will map it to an output section. We can't just create it
460 only if we need it, because we will not know whether we need it
461 until we have seen all the input files, and the first time the
462 main linker code calls BFD after examining all the input files
463 (size_dynamic_sections) the input sections have already been
464 mapped to the output sections. If the section turns out not to
465 be needed, we can discard it later. We will never need this
466 section when generating a shared object, since they do not use
468 if (bfd_link_executable (info
))
470 s
= bfd_make_section_anyway_with_flags (abfd
,
471 (bed
->rela_plts_and_copies_p
472 ? ".rela.bss" : ".rel.bss"),
473 flags
| SEC_READONLY
);
475 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
479 if (bed
->want_dynrelro
)
481 s
= (bfd_make_section_anyway_with_flags
482 (abfd
, (bed
->rela_plts_and_copies_p
483 ? ".rela.data.rel.ro" : ".rel.data.rel.ro"),
484 flags
| SEC_READONLY
));
486 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
488 htab
->sreldynrelro
= s
;
496 /* Record a new dynamic symbol. We record the dynamic symbols as we
497 read the input files, since we need to have a list of all of them
498 before we can determine the final sizes of the output sections.
499 Note that we may actually call this function even though we are not
500 going to output any dynamic symbols; in some cases we know that a
501 symbol should be in the dynamic symbol table, but only if there is
505 bfd_elf_link_record_dynamic_symbol (struct bfd_link_info
*info
,
506 struct elf_link_hash_entry
*h
)
508 if (h
->dynindx
== -1)
510 struct elf_strtab_hash
*dynstr
;
515 if (h
->root
.type
== bfd_link_hash_defined
516 || h
->root
.type
== bfd_link_hash_defweak
)
518 /* An IR symbol should not be made dynamic. */
519 if (h
->root
.u
.def
.section
!= NULL
520 && h
->root
.u
.def
.section
->owner
!= NULL
521 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)
525 /* XXX: The ABI draft says the linker must turn hidden and
526 internal symbols into STB_LOCAL symbols when producing the
527 DSO. However, if ld.so honors st_other in the dynamic table,
528 this would not be necessary. */
529 switch (ELF_ST_VISIBILITY (h
->other
))
533 if (h
->root
.type
!= bfd_link_hash_undefined
534 && h
->root
.type
!= bfd_link_hash_undefweak
)
537 if (!elf_hash_table (info
)->is_relocatable_executable
538 || ((h
->root
.type
== bfd_link_hash_defined
539 || h
->root
.type
== bfd_link_hash_defweak
)
540 && h
->root
.u
.def
.section
->owner
!= NULL
541 && h
->root
.u
.def
.section
->owner
->no_export
)
542 || (h
->root
.type
== bfd_link_hash_common
543 && h
->root
.u
.c
.p
->section
->owner
!= NULL
544 && h
->root
.u
.c
.p
->section
->owner
->no_export
))
552 h
->dynindx
= elf_hash_table (info
)->dynsymcount
;
553 ++elf_hash_table (info
)->dynsymcount
;
555 dynstr
= elf_hash_table (info
)->dynstr
;
558 /* Create a strtab to hold the dynamic symbol names. */
559 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
564 /* We don't put any version information in the dynamic string
566 name
= h
->root
.root
.string
;
567 p
= strchr (name
, ELF_VER_CHR
);
569 /* We know that the p points into writable memory. In fact,
570 there are only a few symbols that have read-only names, being
571 those like _GLOBAL_OFFSET_TABLE_ that are created specially
572 by the backends. Most symbols will have names pointing into
573 an ELF string table read from a file, or to objalloc memory. */
576 indx
= _bfd_elf_strtab_add (dynstr
, name
, p
!= NULL
);
581 if (indx
== (size_t) -1)
583 h
->dynstr_index
= indx
;
589 /* Mark a symbol dynamic. */
592 bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info
*info
,
593 struct elf_link_hash_entry
*h
,
594 Elf_Internal_Sym
*sym
)
596 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
598 /* It may be called more than once on the same H. */
599 if(h
->dynamic
|| bfd_link_relocatable (info
))
602 if ((info
->dynamic_data
603 && (h
->type
== STT_OBJECT
604 || h
->type
== STT_COMMON
606 && (ELF_ST_TYPE (sym
->st_info
) == STT_OBJECT
607 || ELF_ST_TYPE (sym
->st_info
) == STT_COMMON
))))
610 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
613 /* NB: If a symbol is made dynamic by --dynamic-list, it has
615 h
->root
.non_ir_ref_dynamic
= 1;
619 /* Record an assignment to a symbol made by a linker script. We need
620 this in case some dynamic object refers to this symbol. */
623 bfd_elf_record_link_assignment (bfd
*output_bfd
,
624 struct bfd_link_info
*info
,
629 struct elf_link_hash_entry
*h
, *hv
;
630 struct elf_link_hash_table
*htab
;
631 const struct elf_backend_data
*bed
;
633 if (!is_elf_hash_table (info
->hash
))
636 htab
= elf_hash_table (info
);
637 h
= elf_link_hash_lookup (htab
, name
, !provide
, TRUE
, FALSE
);
641 if (h
->root
.type
== bfd_link_hash_warning
)
642 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
644 if (h
->versioned
== unknown
)
646 /* Set versioned if symbol version is unknown. */
647 char *version
= strrchr (name
, ELF_VER_CHR
);
650 if (version
> name
&& version
[-1] != ELF_VER_CHR
)
651 h
->versioned
= versioned_hidden
;
653 h
->versioned
= versioned
;
657 /* Symbols defined in a linker script but not referenced anywhere
658 else will have non_elf set. */
661 bfd_elf_link_mark_dynamic_symbol (info
, h
, NULL
);
665 switch (h
->root
.type
)
667 case bfd_link_hash_defined
:
668 case bfd_link_hash_defweak
:
669 case bfd_link_hash_common
:
671 case bfd_link_hash_undefweak
:
672 case bfd_link_hash_undefined
:
673 /* Since we're defining the symbol, don't let it seem to have not
674 been defined. record_dynamic_symbol and size_dynamic_sections
675 may depend on this. */
676 h
->root
.type
= bfd_link_hash_new
;
677 if (h
->root
.u
.undef
.next
!= NULL
|| htab
->root
.undefs_tail
== &h
->root
)
678 bfd_link_repair_undef_list (&htab
->root
);
680 case bfd_link_hash_new
:
682 case bfd_link_hash_indirect
:
683 /* We had a versioned symbol in a dynamic library. We make the
684 the versioned symbol point to this one. */
685 bed
= get_elf_backend_data (output_bfd
);
687 while (hv
->root
.type
== bfd_link_hash_indirect
688 || hv
->root
.type
== bfd_link_hash_warning
)
689 hv
= (struct elf_link_hash_entry
*) hv
->root
.u
.i
.link
;
690 /* We don't need to update h->root.u since linker will set them
692 h
->root
.type
= bfd_link_hash_undefined
;
693 hv
->root
.type
= bfd_link_hash_indirect
;
694 hv
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
695 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hv
);
702 /* If this symbol is being provided by the linker script, and it is
703 currently defined by a dynamic object, but not by a regular
704 object, then mark it as undefined so that the generic linker will
705 force the correct value. */
709 h
->root
.type
= bfd_link_hash_undefined
;
711 /* If this symbol is currently defined by a dynamic object, but not
712 by a regular object, then clear out any version information because
713 the symbol will not be associated with the dynamic object any
715 if (h
->def_dynamic
&& !h
->def_regular
)
716 h
->verinfo
.verdef
= NULL
;
718 /* Make sure this symbol is not garbage collected. */
725 bed
= get_elf_backend_data (output_bfd
);
726 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
727 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
728 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
731 /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects
733 if (!bfd_link_relocatable (info
)
735 && (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
736 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
))
741 || bfd_link_dll (info
)
742 || elf_hash_table (info
)->is_relocatable_executable
)
746 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
749 /* If this is a weak defined symbol, and we know a corresponding
750 real symbol from the same dynamic object, make sure the real
751 symbol is also made into a dynamic symbol. */
754 struct elf_link_hash_entry
*def
= weakdef (h
);
756 if (def
->dynindx
== -1
757 && !bfd_elf_link_record_dynamic_symbol (info
, def
))
765 /* Record a new local dynamic symbol. Returns 0 on failure, 1 on
766 success, and 2 on a failure caused by attempting to record a symbol
767 in a discarded section, eg. a discarded link-once section symbol. */
770 bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info
*info
,
775 struct elf_link_local_dynamic_entry
*entry
;
776 struct elf_link_hash_table
*eht
;
777 struct elf_strtab_hash
*dynstr
;
780 Elf_External_Sym_Shndx eshndx
;
781 char esym
[sizeof (Elf64_External_Sym
)];
783 if (! is_elf_hash_table (info
->hash
))
786 /* See if the entry exists already. */
787 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
788 if (entry
->input_bfd
== input_bfd
&& entry
->input_indx
== input_indx
)
791 amt
= sizeof (*entry
);
792 entry
= (struct elf_link_local_dynamic_entry
*) bfd_alloc (input_bfd
, amt
);
796 /* Go find the symbol, so that we can find it's name. */
797 if (!bfd_elf_get_elf_syms (input_bfd
, &elf_tdata (input_bfd
)->symtab_hdr
,
798 1, input_indx
, &entry
->isym
, esym
, &eshndx
))
800 bfd_release (input_bfd
, entry
);
804 if (entry
->isym
.st_shndx
!= SHN_UNDEF
805 && entry
->isym
.st_shndx
< SHN_LORESERVE
)
809 s
= bfd_section_from_elf_index (input_bfd
, entry
->isym
.st_shndx
);
810 if (s
== NULL
|| bfd_is_abs_section (s
->output_section
))
812 /* We can still bfd_release here as nothing has done another
813 bfd_alloc. We can't do this later in this function. */
814 bfd_release (input_bfd
, entry
);
819 name
= (bfd_elf_string_from_elf_section
820 (input_bfd
, elf_tdata (input_bfd
)->symtab_hdr
.sh_link
,
821 entry
->isym
.st_name
));
823 dynstr
= elf_hash_table (info
)->dynstr
;
826 /* Create a strtab to hold the dynamic symbol names. */
827 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
832 dynstr_index
= _bfd_elf_strtab_add (dynstr
, name
, FALSE
);
833 if (dynstr_index
== (size_t) -1)
835 entry
->isym
.st_name
= dynstr_index
;
837 eht
= elf_hash_table (info
);
839 entry
->next
= eht
->dynlocal
;
840 eht
->dynlocal
= entry
;
841 entry
->input_bfd
= input_bfd
;
842 entry
->input_indx
= input_indx
;
845 /* Whatever binding the symbol had before, it's now local. */
847 = ELF_ST_INFO (STB_LOCAL
, ELF_ST_TYPE (entry
->isym
.st_info
));
849 /* The dynindx will be set at the end of size_dynamic_sections. */
854 /* Return the dynindex of a local dynamic symbol. */
857 _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info
*info
,
861 struct elf_link_local_dynamic_entry
*e
;
863 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
864 if (e
->input_bfd
== input_bfd
&& e
->input_indx
== input_indx
)
869 /* This function is used to renumber the dynamic symbols, if some of
870 them are removed because they are marked as local. This is called
871 via elf_link_hash_traverse. */
874 elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
877 size_t *count
= (size_t *) data
;
882 if (h
->dynindx
!= -1)
883 h
->dynindx
= ++(*count
);
889 /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with
890 STB_LOCAL binding. */
893 elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
896 size_t *count
= (size_t *) data
;
898 if (!h
->forced_local
)
901 if (h
->dynindx
!= -1)
902 h
->dynindx
= ++(*count
);
907 /* Return true if the dynamic symbol for a given section should be
908 omitted when creating a shared library. */
910 _bfd_elf_omit_section_dynsym_default (bfd
*output_bfd ATTRIBUTE_UNUSED
,
911 struct bfd_link_info
*info
,
914 struct elf_link_hash_table
*htab
;
917 switch (elf_section_data (p
)->this_hdr
.sh_type
)
921 /* If sh_type is yet undecided, assume it could be
922 SHT_PROGBITS/SHT_NOBITS. */
924 htab
= elf_hash_table (info
);
925 if (htab
->text_index_section
!= NULL
)
926 return p
!= htab
->text_index_section
&& p
!= htab
->data_index_section
;
928 return (htab
->dynobj
!= NULL
929 && (ip
= bfd_get_linker_section (htab
->dynobj
, p
->name
)) != NULL
930 && ip
->output_section
== p
);
932 /* There shouldn't be section relative relocations
933 against any other section. */
940 _bfd_elf_omit_section_dynsym_all
941 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
942 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
943 asection
*p ATTRIBUTE_UNUSED
)
948 /* Assign dynsym indices. In a shared library we generate a section
949 symbol for each output section, which come first. Next come symbols
950 which have been forced to local binding. Then all of the back-end
951 allocated local dynamic syms, followed by the rest of the global
952 symbols. If SECTION_SYM_COUNT is NULL, section dynindx is not set.
953 (This prevents the early call before elf_backend_init_index_section
954 and strip_excluded_output_sections setting dynindx for sections
955 that are stripped.) */
958 _bfd_elf_link_renumber_dynsyms (bfd
*output_bfd
,
959 struct bfd_link_info
*info
,
960 unsigned long *section_sym_count
)
962 unsigned long dynsymcount
= 0;
963 bfd_boolean do_sec
= section_sym_count
!= NULL
;
965 if (bfd_link_pic (info
)
966 || elf_hash_table (info
)->is_relocatable_executable
)
968 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
970 for (p
= output_bfd
->sections
; p
; p
= p
->next
)
971 if ((p
->flags
& SEC_EXCLUDE
) == 0
972 && (p
->flags
& SEC_ALLOC
) != 0
973 && elf_hash_table (info
)->dynamic_relocs
974 && !(*bed
->elf_backend_omit_section_dynsym
) (output_bfd
, info
, p
))
978 elf_section_data (p
)->dynindx
= dynsymcount
;
981 elf_section_data (p
)->dynindx
= 0;
984 *section_sym_count
= dynsymcount
;
986 elf_link_hash_traverse (elf_hash_table (info
),
987 elf_link_renumber_local_hash_table_dynsyms
,
990 if (elf_hash_table (info
)->dynlocal
)
992 struct elf_link_local_dynamic_entry
*p
;
993 for (p
= elf_hash_table (info
)->dynlocal
; p
; p
= p
->next
)
994 p
->dynindx
= ++dynsymcount
;
996 elf_hash_table (info
)->local_dynsymcount
= dynsymcount
;
998 elf_link_hash_traverse (elf_hash_table (info
),
999 elf_link_renumber_hash_table_dynsyms
,
1002 /* There is an unused NULL entry at the head of the table which we
1003 must account for in our count even if the table is empty since it
1004 is intended for the mandatory DT_SYMTAB tag (.dynsym section) in
1005 .dynamic section. */
1008 elf_hash_table (info
)->dynsymcount
= dynsymcount
;
1012 /* Merge st_other field. */
1015 elf_merge_st_other (bfd
*abfd
, struct elf_link_hash_entry
*h
,
1016 unsigned int st_other
, asection
*sec
,
1017 bfd_boolean definition
, bfd_boolean dynamic
)
1019 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1021 /* If st_other has a processor-specific meaning, specific
1022 code might be needed here. */
1023 if (bed
->elf_backend_merge_symbol_attribute
)
1024 (*bed
->elf_backend_merge_symbol_attribute
) (h
, st_other
, definition
,
1029 unsigned symvis
= ELF_ST_VISIBILITY (st_other
);
1030 unsigned hvis
= ELF_ST_VISIBILITY (h
->other
);
1032 /* Keep the most constraining visibility. Leave the remainder
1033 of the st_other field to elf_backend_merge_symbol_attribute. */
1034 if (symvis
- 1 < hvis
- 1)
1035 h
->other
= symvis
| (h
->other
& ~ELF_ST_VISIBILITY (-1));
1038 && ELF_ST_VISIBILITY (st_other
) != STV_DEFAULT
1039 && (sec
->flags
& SEC_READONLY
) == 0)
1040 h
->protected_def
= 1;
1043 /* This function is called when we want to merge a new symbol with an
1044 existing symbol. It handles the various cases which arise when we
1045 find a definition in a dynamic object, or when there is already a
1046 definition in a dynamic object. The new symbol is described by
1047 NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table
1048 entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK
1049 if the old symbol was weak. We set POLD_ALIGNMENT to the alignment
1050 of an old common symbol. We set OVERRIDE if the old symbol is
1051 overriding a new definition. We set TYPE_CHANGE_OK if it is OK for
1052 the type to change. We set SIZE_CHANGE_OK if it is OK for the size
1053 to change. By OK to change, we mean that we shouldn't warn if the
1054 type or size does change. */
1057 _bfd_elf_merge_symbol (bfd
*abfd
,
1058 struct bfd_link_info
*info
,
1060 Elf_Internal_Sym
*sym
,
1063 struct elf_link_hash_entry
**sym_hash
,
1065 bfd_boolean
*pold_weak
,
1066 unsigned int *pold_alignment
,
1069 bfd_boolean
*type_change_ok
,
1070 bfd_boolean
*size_change_ok
,
1071 bfd_boolean
*matched
)
1073 asection
*sec
, *oldsec
;
1074 struct elf_link_hash_entry
*h
;
1075 struct elf_link_hash_entry
*hi
;
1076 struct elf_link_hash_entry
*flip
;
1079 bfd_boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
1080 bfd_boolean newweak
, oldweak
, newfunc
, oldfunc
;
1081 const struct elf_backend_data
*bed
;
1083 bfd_boolean default_sym
= *matched
;
1089 bind
= ELF_ST_BIND (sym
->st_info
);
1091 if (! bfd_is_und_section (sec
))
1092 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, FALSE
, FALSE
);
1094 h
= ((struct elf_link_hash_entry
*)
1095 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, TRUE
, FALSE
, FALSE
));
1100 bed
= get_elf_backend_data (abfd
);
1102 /* NEW_VERSION is the symbol version of the new symbol. */
1103 if (h
->versioned
!= unversioned
)
1105 /* Symbol version is unknown or versioned. */
1106 new_version
= strrchr (name
, ELF_VER_CHR
);
1109 if (h
->versioned
== unknown
)
1111 if (new_version
> name
&& new_version
[-1] != ELF_VER_CHR
)
1112 h
->versioned
= versioned_hidden
;
1114 h
->versioned
= versioned
;
1117 if (new_version
[0] == '\0')
1121 h
->versioned
= unversioned
;
1126 /* For merging, we only care about real symbols. But we need to make
1127 sure that indirect symbol dynamic flags are updated. */
1129 while (h
->root
.type
== bfd_link_hash_indirect
1130 || h
->root
.type
== bfd_link_hash_warning
)
1131 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1135 if (hi
== h
|| h
->root
.type
== bfd_link_hash_new
)
1139 /* OLD_HIDDEN is true if the existing symbol is only visible
1140 to the symbol with the same symbol version. NEW_HIDDEN is
1141 true if the new symbol is only visible to the symbol with
1142 the same symbol version. */
1143 bfd_boolean old_hidden
= h
->versioned
== versioned_hidden
;
1144 bfd_boolean new_hidden
= hi
->versioned
== versioned_hidden
;
1145 if (!old_hidden
&& !new_hidden
)
1146 /* The new symbol matches the existing symbol if both
1151 /* OLD_VERSION is the symbol version of the existing
1155 if (h
->versioned
>= versioned
)
1156 old_version
= strrchr (h
->root
.root
.string
,
1161 /* The new symbol matches the existing symbol if they
1162 have the same symbol version. */
1163 *matched
= (old_version
== new_version
1164 || (old_version
!= NULL
1165 && new_version
!= NULL
1166 && strcmp (old_version
, new_version
) == 0));
1171 /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the
1176 switch (h
->root
.type
)
1181 case bfd_link_hash_undefined
:
1182 case bfd_link_hash_undefweak
:
1183 oldbfd
= h
->root
.u
.undef
.abfd
;
1186 case bfd_link_hash_defined
:
1187 case bfd_link_hash_defweak
:
1188 oldbfd
= h
->root
.u
.def
.section
->owner
;
1189 oldsec
= h
->root
.u
.def
.section
;
1192 case bfd_link_hash_common
:
1193 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
1194 oldsec
= h
->root
.u
.c
.p
->section
;
1196 *pold_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1199 if (poldbfd
&& *poldbfd
== NULL
)
1202 /* Differentiate strong and weak symbols. */
1203 newweak
= bind
== STB_WEAK
;
1204 oldweak
= (h
->root
.type
== bfd_link_hash_defweak
1205 || h
->root
.type
== bfd_link_hash_undefweak
);
1207 *pold_weak
= oldweak
;
1209 /* We have to check it for every instance since the first few may be
1210 references and not all compilers emit symbol type for undefined
1212 bfd_elf_link_mark_dynamic_symbol (info
, h
, sym
);
1214 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
1215 respectively, is from a dynamic object. */
1217 newdyn
= (abfd
->flags
& DYNAMIC
) != 0;
1219 /* ref_dynamic_nonweak and dynamic_def flags track actual undefined
1220 syms and defined syms in dynamic libraries respectively.
1221 ref_dynamic on the other hand can be set for a symbol defined in
1222 a dynamic library, and def_dynamic may not be set; When the
1223 definition in a dynamic lib is overridden by a definition in the
1224 executable use of the symbol in the dynamic lib becomes a
1225 reference to the executable symbol. */
1228 if (bfd_is_und_section (sec
))
1230 if (bind
!= STB_WEAK
)
1232 h
->ref_dynamic_nonweak
= 1;
1233 hi
->ref_dynamic_nonweak
= 1;
1238 /* Update the existing symbol only if they match. */
1241 hi
->dynamic_def
= 1;
1245 /* If we just created the symbol, mark it as being an ELF symbol.
1246 Other than that, there is nothing to do--there is no merge issue
1247 with a newly defined symbol--so we just return. */
1249 if (h
->root
.type
== bfd_link_hash_new
)
1255 /* In cases involving weak versioned symbols, we may wind up trying
1256 to merge a symbol with itself. Catch that here, to avoid the
1257 confusion that results if we try to override a symbol with
1258 itself. The additional tests catch cases like
1259 _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
1260 dynamic object, which we do want to handle here. */
1262 && (newweak
|| oldweak
)
1263 && ((abfd
->flags
& DYNAMIC
) == 0
1264 || !h
->def_regular
))
1269 olddyn
= (oldbfd
->flags
& DYNAMIC
) != 0;
1270 else if (oldsec
!= NULL
)
1272 /* This handles the special SHN_MIPS_{TEXT,DATA} section
1273 indices used by MIPS ELF. */
1274 olddyn
= (oldsec
->symbol
->flags
& BSF_DYNAMIC
) != 0;
1277 /* Handle a case where plugin_notice won't be called and thus won't
1278 set the non_ir_ref flags on the first pass over symbols. */
1280 && (oldbfd
->flags
& BFD_PLUGIN
) != (abfd
->flags
& BFD_PLUGIN
)
1281 && newdyn
!= olddyn
)
1283 h
->root
.non_ir_ref_dynamic
= TRUE
;
1284 hi
->root
.non_ir_ref_dynamic
= TRUE
;
1287 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
1288 respectively, appear to be a definition rather than reference. */
1290 newdef
= !bfd_is_und_section (sec
) && !bfd_is_com_section (sec
);
1292 olddef
= (h
->root
.type
!= bfd_link_hash_undefined
1293 && h
->root
.type
!= bfd_link_hash_undefweak
1294 && h
->root
.type
!= bfd_link_hash_common
);
1296 /* NEWFUNC and OLDFUNC indicate whether the new or old symbol,
1297 respectively, appear to be a function. */
1299 newfunc
= (ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1300 && bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)));
1302 oldfunc
= (h
->type
!= STT_NOTYPE
1303 && bed
->is_function_type (h
->type
));
1305 if (!(newfunc
&& oldfunc
)
1306 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1307 && ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1308 && h
->type
!= STT_NOTYPE
1309 && (newdef
|| bfd_is_com_section (sec
))
1310 && (olddef
|| h
->root
.type
== bfd_link_hash_common
))
1312 /* If creating a default indirect symbol ("foo" or "foo@") from
1313 a dynamic versioned definition ("foo@@") skip doing so if
1314 there is an existing regular definition with a different
1315 type. We don't want, for example, a "time" variable in the
1316 executable overriding a "time" function in a shared library. */
1324 /* When adding a symbol from a regular object file after we have
1325 created indirect symbols, undo the indirection and any
1332 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1333 h
->forced_local
= 0;
1337 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1339 h
->root
.type
= bfd_link_hash_undefined
;
1340 h
->root
.u
.undef
.abfd
= abfd
;
1344 h
->root
.type
= bfd_link_hash_new
;
1345 h
->root
.u
.undef
.abfd
= NULL
;
1351 /* Check TLS symbols. We don't check undefined symbols introduced
1352 by "ld -u" which have no type (and oldbfd NULL), and we don't
1353 check symbols from plugins because they also have no type. */
1355 && (oldbfd
->flags
& BFD_PLUGIN
) == 0
1356 && (abfd
->flags
& BFD_PLUGIN
) == 0
1357 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1358 && (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
|| h
->type
== STT_TLS
))
1361 bfd_boolean ntdef
, tdef
;
1362 asection
*ntsec
, *tsec
;
1364 if (h
->type
== STT_TLS
)
1385 /* xgettext:c-format */
1386 (_("%s: TLS definition in %pB section %pA "
1387 "mismatches non-TLS definition in %pB section %pA"),
1388 h
->root
.root
.string
, tbfd
, tsec
, ntbfd
, ntsec
);
1389 else if (!tdef
&& !ntdef
)
1391 /* xgettext:c-format */
1392 (_("%s: TLS reference in %pB "
1393 "mismatches non-TLS reference in %pB"),
1394 h
->root
.root
.string
, tbfd
, ntbfd
);
1397 /* xgettext:c-format */
1398 (_("%s: TLS definition in %pB section %pA "
1399 "mismatches non-TLS reference in %pB"),
1400 h
->root
.root
.string
, tbfd
, tsec
, ntbfd
);
1403 /* xgettext:c-format */
1404 (_("%s: TLS reference in %pB "
1405 "mismatches non-TLS definition in %pB section %pA"),
1406 h
->root
.root
.string
, tbfd
, ntbfd
, ntsec
);
1408 bfd_set_error (bfd_error_bad_value
);
1412 /* If the old symbol has non-default visibility, we ignore the new
1413 definition from a dynamic object. */
1415 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1416 && !bfd_is_und_section (sec
))
1419 /* Make sure this symbol is dynamic. */
1421 hi
->ref_dynamic
= 1;
1422 /* A protected symbol has external availability. Make sure it is
1423 recorded as dynamic.
1425 FIXME: Should we check type and size for protected symbol? */
1426 if (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
1427 return bfd_elf_link_record_dynamic_symbol (info
, h
);
1432 && ELF_ST_VISIBILITY (sym
->st_other
) != STV_DEFAULT
1435 /* If the new symbol with non-default visibility comes from a
1436 relocatable file and the old definition comes from a dynamic
1437 object, we remove the old definition. */
1438 if (hi
->root
.type
== bfd_link_hash_indirect
)
1440 /* Handle the case where the old dynamic definition is
1441 default versioned. We need to copy the symbol info from
1442 the symbol with default version to the normal one if it
1443 was referenced before. */
1446 hi
->root
.type
= h
->root
.type
;
1447 h
->root
.type
= bfd_link_hash_indirect
;
1448 (*bed
->elf_backend_copy_indirect_symbol
) (info
, hi
, h
);
1450 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1451 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1453 /* If the new symbol is hidden or internal, completely undo
1454 any dynamic link state. */
1455 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1456 h
->forced_local
= 0;
1463 /* FIXME: Should we check type and size for protected symbol? */
1473 /* If the old symbol was undefined before, then it will still be
1474 on the undefs list. If the new symbol is undefined or
1475 common, we can't make it bfd_link_hash_new here, because new
1476 undefined or common symbols will be added to the undefs list
1477 by _bfd_generic_link_add_one_symbol. Symbols may not be
1478 added twice to the undefs list. Also, if the new symbol is
1479 undefweak then we don't want to lose the strong undef. */
1480 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1482 h
->root
.type
= bfd_link_hash_undefined
;
1483 h
->root
.u
.undef
.abfd
= abfd
;
1487 h
->root
.type
= bfd_link_hash_new
;
1488 h
->root
.u
.undef
.abfd
= NULL
;
1491 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1493 /* If the new symbol is hidden or internal, completely undo
1494 any dynamic link state. */
1495 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1496 h
->forced_local
= 0;
1502 /* FIXME: Should we check type and size for protected symbol? */
1508 /* If a new weak symbol definition comes from a regular file and the
1509 old symbol comes from a dynamic library, we treat the new one as
1510 strong. Similarly, an old weak symbol definition from a regular
1511 file is treated as strong when the new symbol comes from a dynamic
1512 library. Further, an old weak symbol from a dynamic library is
1513 treated as strong if the new symbol is from a dynamic library.
1514 This reflects the way glibc's ld.so works.
1516 Also allow a weak symbol to override a linker script symbol
1517 defined by an early pass over the script. This is done so the
1518 linker knows the symbol is defined in an object file, for the
1519 DEFINED script function.
1521 Do this before setting *type_change_ok or *size_change_ok so that
1522 we warn properly when dynamic library symbols are overridden. */
1524 if (newdef
&& !newdyn
&& (olddyn
|| h
->root
.ldscript_def
))
1526 if (olddef
&& newdyn
)
1529 /* Allow changes between different types of function symbol. */
1530 if (newfunc
&& oldfunc
)
1531 *type_change_ok
= TRUE
;
1533 /* It's OK to change the type if either the existing symbol or the
1534 new symbol is weak. A type change is also OK if the old symbol
1535 is undefined and the new symbol is defined. */
1540 && h
->root
.type
== bfd_link_hash_undefined
))
1541 *type_change_ok
= TRUE
;
1543 /* It's OK to change the size if either the existing symbol or the
1544 new symbol is weak, or if the old symbol is undefined. */
1547 || h
->root
.type
== bfd_link_hash_undefined
)
1548 *size_change_ok
= TRUE
;
1550 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
1551 symbol, respectively, appears to be a common symbol in a dynamic
1552 object. If a symbol appears in an uninitialized section, and is
1553 not weak, and is not a function, then it may be a common symbol
1554 which was resolved when the dynamic object was created. We want
1555 to treat such symbols specially, because they raise special
1556 considerations when setting the symbol size: if the symbol
1557 appears as a common symbol in a regular object, and the size in
1558 the regular object is larger, we must make sure that we use the
1559 larger size. This problematic case can always be avoided in C,
1560 but it must be handled correctly when using Fortran shared
1563 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
1564 likewise for OLDDYNCOMMON and OLDDEF.
1566 Note that this test is just a heuristic, and that it is quite
1567 possible to have an uninitialized symbol in a shared object which
1568 is really a definition, rather than a common symbol. This could
1569 lead to some minor confusion when the symbol really is a common
1570 symbol in some regular object. However, I think it will be
1576 && (sec
->flags
& SEC_ALLOC
) != 0
1577 && (sec
->flags
& SEC_LOAD
) == 0
1580 newdyncommon
= TRUE
;
1582 newdyncommon
= FALSE
;
1586 && h
->root
.type
== bfd_link_hash_defined
1588 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
1589 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
1592 olddyncommon
= TRUE
;
1594 olddyncommon
= FALSE
;
1596 /* We now know everything about the old and new symbols. We ask the
1597 backend to check if we can merge them. */
1598 if (bed
->merge_symbol
!= NULL
)
1600 if (!bed
->merge_symbol (h
, sym
, psec
, newdef
, olddef
, oldbfd
, oldsec
))
1605 /* There are multiple definitions of a normal symbol. Skip the
1606 default symbol as well as definition from an IR object. */
1607 if (olddef
&& !olddyn
&& !oldweak
&& newdef
&& !newdyn
&& !newweak
1608 && !default_sym
&& h
->def_regular
1610 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1611 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1613 /* Handle a multiple definition. */
1614 (*info
->callbacks
->multiple_definition
) (info
, &h
->root
,
1615 abfd
, sec
, *pvalue
);
1620 /* If both the old and the new symbols look like common symbols in a
1621 dynamic object, set the size of the symbol to the larger of the
1626 && sym
->st_size
!= h
->size
)
1628 /* Since we think we have two common symbols, issue a multiple
1629 common warning if desired. Note that we only warn if the
1630 size is different. If the size is the same, we simply let
1631 the old symbol override the new one as normally happens with
1632 symbols defined in dynamic objects. */
1634 (*info
->callbacks
->multiple_common
) (info
, &h
->root
, abfd
,
1635 bfd_link_hash_common
, sym
->st_size
);
1636 if (sym
->st_size
> h
->size
)
1637 h
->size
= sym
->st_size
;
1639 *size_change_ok
= TRUE
;
1642 /* If we are looking at a dynamic object, and we have found a
1643 definition, we need to see if the symbol was already defined by
1644 some other object. If so, we want to use the existing
1645 definition, and we do not want to report a multiple symbol
1646 definition error; we do this by clobbering *PSEC to be
1647 bfd_und_section_ptr.
1649 We treat a common symbol as a definition if the symbol in the
1650 shared library is a function, since common symbols always
1651 represent variables; this can cause confusion in principle, but
1652 any such confusion would seem to indicate an erroneous program or
1653 shared library. We also permit a common symbol in a regular
1654 object to override a weak symbol in a shared object. */
1659 || (h
->root
.type
== bfd_link_hash_common
1660 && (newweak
|| newfunc
))))
1664 newdyncommon
= FALSE
;
1666 *psec
= sec
= bfd_und_section_ptr
;
1667 *size_change_ok
= TRUE
;
1669 /* If we get here when the old symbol is a common symbol, then
1670 we are explicitly letting it override a weak symbol or
1671 function in a dynamic object, and we don't want to warn about
1672 a type change. If the old symbol is a defined symbol, a type
1673 change warning may still be appropriate. */
1675 if (h
->root
.type
== bfd_link_hash_common
)
1676 *type_change_ok
= TRUE
;
1679 /* Handle the special case of an old common symbol merging with a
1680 new symbol which looks like a common symbol in a shared object.
1681 We change *PSEC and *PVALUE to make the new symbol look like a
1682 common symbol, and let _bfd_generic_link_add_one_symbol do the
1686 && h
->root
.type
== bfd_link_hash_common
)
1690 newdyncommon
= FALSE
;
1691 *pvalue
= sym
->st_size
;
1692 *psec
= sec
= bed
->common_section (oldsec
);
1693 *size_change_ok
= TRUE
;
1696 /* Skip weak definitions of symbols that are already defined. */
1697 if (newdef
&& olddef
&& newweak
)
1699 /* Don't skip new non-IR weak syms. */
1700 if (!(oldbfd
!= NULL
1701 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1702 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1708 /* Merge st_other. If the symbol already has a dynamic index,
1709 but visibility says it should not be visible, turn it into a
1711 elf_merge_st_other (abfd
, h
, sym
->st_other
, sec
, newdef
, newdyn
);
1712 if (h
->dynindx
!= -1)
1713 switch (ELF_ST_VISIBILITY (h
->other
))
1717 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1722 /* If the old symbol is from a dynamic object, and the new symbol is
1723 a definition which is not from a dynamic object, then the new
1724 symbol overrides the old symbol. Symbols from regular files
1725 always take precedence over symbols from dynamic objects, even if
1726 they are defined after the dynamic object in the link.
1728 As above, we again permit a common symbol in a regular object to
1729 override a definition in a shared object if the shared object
1730 symbol is a function or is weak. */
1735 || (bfd_is_com_section (sec
)
1736 && (oldweak
|| oldfunc
)))
1741 /* Change the hash table entry to undefined, and let
1742 _bfd_generic_link_add_one_symbol do the right thing with the
1745 h
->root
.type
= bfd_link_hash_undefined
;
1746 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1747 *size_change_ok
= TRUE
;
1750 olddyncommon
= FALSE
;
1752 /* We again permit a type change when a common symbol may be
1753 overriding a function. */
1755 if (bfd_is_com_section (sec
))
1759 /* If a common symbol overrides a function, make sure
1760 that it isn't defined dynamically nor has type
1763 h
->type
= STT_NOTYPE
;
1765 *type_change_ok
= TRUE
;
1768 if (hi
->root
.type
== bfd_link_hash_indirect
)
1771 /* This union may have been set to be non-NULL when this symbol
1772 was seen in a dynamic object. We must force the union to be
1773 NULL, so that it is correct for a regular symbol. */
1774 h
->verinfo
.vertree
= NULL
;
1777 /* Handle the special case of a new common symbol merging with an
1778 old symbol that looks like it might be a common symbol defined in
1779 a shared object. Note that we have already handled the case in
1780 which a new common symbol should simply override the definition
1781 in the shared library. */
1784 && bfd_is_com_section (sec
)
1787 /* It would be best if we could set the hash table entry to a
1788 common symbol, but we don't know what to use for the section
1789 or the alignment. */
1790 (*info
->callbacks
->multiple_common
) (info
, &h
->root
, abfd
,
1791 bfd_link_hash_common
, sym
->st_size
);
1793 /* If the presumed common symbol in the dynamic object is
1794 larger, pretend that the new symbol has its size. */
1796 if (h
->size
> *pvalue
)
1799 /* We need to remember the alignment required by the symbol
1800 in the dynamic object. */
1801 BFD_ASSERT (pold_alignment
);
1802 *pold_alignment
= h
->root
.u
.def
.section
->alignment_power
;
1805 olddyncommon
= FALSE
;
1807 h
->root
.type
= bfd_link_hash_undefined
;
1808 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1810 *size_change_ok
= TRUE
;
1811 *type_change_ok
= TRUE
;
1813 if (hi
->root
.type
== bfd_link_hash_indirect
)
1816 h
->verinfo
.vertree
= NULL
;
1821 /* Handle the case where we had a versioned symbol in a dynamic
1822 library and now find a definition in a normal object. In this
1823 case, we make the versioned symbol point to the normal one. */
1824 flip
->root
.type
= h
->root
.type
;
1825 flip
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
1826 h
->root
.type
= bfd_link_hash_indirect
;
1827 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) flip
;
1828 (*bed
->elf_backend_copy_indirect_symbol
) (info
, flip
, h
);
1832 flip
->ref_dynamic
= 1;
1839 /* This function is called to create an indirect symbol from the
1840 default for the symbol with the default version if needed. The
1841 symbol is described by H, NAME, SYM, SEC, and VALUE. We
1842 set DYNSYM if the new indirect symbol is dynamic. */
1845 _bfd_elf_add_default_symbol (bfd
*abfd
,
1846 struct bfd_link_info
*info
,
1847 struct elf_link_hash_entry
*h
,
1849 Elf_Internal_Sym
*sym
,
1853 bfd_boolean
*dynsym
)
1855 bfd_boolean type_change_ok
;
1856 bfd_boolean size_change_ok
;
1859 struct elf_link_hash_entry
*hi
;
1860 struct bfd_link_hash_entry
*bh
;
1861 const struct elf_backend_data
*bed
;
1862 bfd_boolean collect
;
1863 bfd_boolean dynamic
;
1866 size_t len
, shortlen
;
1868 bfd_boolean matched
;
1870 if (h
->versioned
== unversioned
|| h
->versioned
== versioned_hidden
)
1873 /* If this symbol has a version, and it is the default version, we
1874 create an indirect symbol from the default name to the fully
1875 decorated name. This will cause external references which do not
1876 specify a version to be bound to this version of the symbol. */
1877 p
= strchr (name
, ELF_VER_CHR
);
1878 if (h
->versioned
== unknown
)
1882 h
->versioned
= unversioned
;
1887 if (p
[1] != ELF_VER_CHR
)
1889 h
->versioned
= versioned_hidden
;
1893 h
->versioned
= versioned
;
1898 /* PR ld/19073: We may see an unversioned definition after the
1904 bed
= get_elf_backend_data (abfd
);
1905 collect
= bed
->collect
;
1906 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
1908 shortlen
= p
- name
;
1909 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
1910 if (shortname
== NULL
)
1912 memcpy (shortname
, name
, shortlen
);
1913 shortname
[shortlen
] = '\0';
1915 /* We are going to create a new symbol. Merge it with any existing
1916 symbol with this name. For the purposes of the merge, act as
1917 though we were defining the symbol we just defined, although we
1918 actually going to define an indirect symbol. */
1919 type_change_ok
= FALSE
;
1920 size_change_ok
= FALSE
;
1923 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1924 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
1925 &type_change_ok
, &size_change_ok
, &matched
))
1931 if (hi
->def_regular
|| ELF_COMMON_DEF_P (hi
))
1933 /* If the undecorated symbol will have a version added by a
1934 script different to H, then don't indirect to/from the
1935 undecorated symbol. This isn't ideal because we may not yet
1936 have seen symbol versions, if given by a script on the
1937 command line rather than via --version-script. */
1938 if (hi
->verinfo
.vertree
== NULL
&& info
->version_info
!= NULL
)
1943 = bfd_find_version_for_sym (info
->version_info
,
1944 hi
->root
.root
.string
, &hide
);
1945 if (hi
->verinfo
.vertree
!= NULL
&& hide
)
1947 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
1951 if (hi
->verinfo
.vertree
!= NULL
1952 && strcmp (p
+ 1 + (p
[1] == '@'), hi
->verinfo
.vertree
->name
) != 0)
1958 /* Add the default symbol if not performing a relocatable link. */
1959 if (! bfd_link_relocatable (info
))
1962 if (bh
->type
== bfd_link_hash_defined
1963 && bh
->u
.def
.section
->owner
!= NULL
1964 && (bh
->u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)
1966 /* Mark the previous definition from IR object as
1967 undefined so that the generic linker will override
1969 bh
->type
= bfd_link_hash_undefined
;
1970 bh
->u
.undef
.abfd
= bh
->u
.def
.section
->owner
;
1972 if (! (_bfd_generic_link_add_one_symbol
1973 (info
, abfd
, shortname
, BSF_INDIRECT
,
1974 bfd_ind_section_ptr
,
1975 0, name
, FALSE
, collect
, &bh
)))
1977 hi
= (struct elf_link_hash_entry
*) bh
;
1982 /* In this case the symbol named SHORTNAME is overriding the
1983 indirect symbol we want to add. We were planning on making
1984 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
1985 is the name without a version. NAME is the fully versioned
1986 name, and it is the default version.
1988 Overriding means that we already saw a definition for the
1989 symbol SHORTNAME in a regular object, and it is overriding
1990 the symbol defined in the dynamic object.
1992 When this happens, we actually want to change NAME, the
1993 symbol we just added, to refer to SHORTNAME. This will cause
1994 references to NAME in the shared object to become references
1995 to SHORTNAME in the regular object. This is what we expect
1996 when we override a function in a shared object: that the
1997 references in the shared object will be mapped to the
1998 definition in the regular object. */
2000 while (hi
->root
.type
== bfd_link_hash_indirect
2001 || hi
->root
.type
== bfd_link_hash_warning
)
2002 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
2004 h
->root
.type
= bfd_link_hash_indirect
;
2005 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
2009 hi
->ref_dynamic
= 1;
2013 if (! bfd_elf_link_record_dynamic_symbol (info
, hi
))
2018 /* Now set HI to H, so that the following code will set the
2019 other fields correctly. */
2023 /* Check if HI is a warning symbol. */
2024 if (hi
->root
.type
== bfd_link_hash_warning
)
2025 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
2027 /* If there is a duplicate definition somewhere, then HI may not
2028 point to an indirect symbol. We will have reported an error to
2029 the user in that case. */
2031 if (hi
->root
.type
== bfd_link_hash_indirect
)
2033 struct elf_link_hash_entry
*ht
;
2035 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
2036 (*bed
->elf_backend_copy_indirect_symbol
) (info
, ht
, hi
);
2038 /* If we first saw a reference to SHORTNAME with non-default
2039 visibility, merge that visibility to the @@VER symbol. */
2040 elf_merge_st_other (abfd
, ht
, hi
->other
, sec
, TRUE
, dynamic
);
2042 /* A reference to the SHORTNAME symbol from a dynamic library
2043 will be satisfied by the versioned symbol at runtime. In
2044 effect, we have a reference to the versioned symbol. */
2045 ht
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
2046 hi
->dynamic_def
|= ht
->dynamic_def
;
2048 /* See if the new flags lead us to realize that the symbol must
2054 if (! bfd_link_executable (info
)
2061 if (hi
->ref_regular
)
2067 /* We also need to define an indirection from the nondefault version
2071 len
= strlen (name
);
2072 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, len
);
2073 if (shortname
== NULL
)
2075 memcpy (shortname
, name
, shortlen
);
2076 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
2078 /* Once again, merge with any existing symbol. */
2079 type_change_ok
= FALSE
;
2080 size_change_ok
= FALSE
;
2082 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
2083 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
2084 &type_change_ok
, &size_change_ok
, &matched
))
2090 && h
->root
.type
== bfd_link_hash_defweak
2091 && hi
->root
.type
== bfd_link_hash_defined
)
2093 /* We are handling a weak sym@@ver and attempting to define
2094 a weak sym@ver, but _bfd_elf_merge_symbol said to skip the
2095 new weak sym@ver because there is already a strong sym@ver.
2096 However, sym@ver and sym@@ver are really the same symbol.
2097 The existing strong sym@ver ought to override sym@@ver. */
2098 h
->root
.type
= bfd_link_hash_defined
;
2099 h
->root
.u
.def
.section
= hi
->root
.u
.def
.section
;
2100 h
->root
.u
.def
.value
= hi
->root
.u
.def
.value
;
2101 hi
->root
.type
= bfd_link_hash_indirect
;
2102 hi
->root
.u
.i
.link
= &h
->root
;
2109 /* Here SHORTNAME is a versioned name, so we don't expect to see
2110 the type of override we do in the case above unless it is
2111 overridden by a versioned definition. */
2112 if (hi
->root
.type
!= bfd_link_hash_defined
2113 && hi
->root
.type
!= bfd_link_hash_defweak
)
2115 /* xgettext:c-format */
2116 (_("%pB: unexpected redefinition of indirect versioned symbol `%s'"),
2123 if (! (_bfd_generic_link_add_one_symbol
2124 (info
, abfd
, shortname
, BSF_INDIRECT
,
2125 bfd_ind_section_ptr
, 0, name
, FALSE
, collect
, &bh
)))
2127 hi
= (struct elf_link_hash_entry
*) bh
;
2130 /* If there is a duplicate definition somewhere, then HI may not
2131 point to an indirect symbol. We will have reported an error
2132 to the user in that case. */
2133 if (hi
->root
.type
== bfd_link_hash_indirect
)
2135 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
2136 h
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
2137 hi
->dynamic_def
|= h
->dynamic_def
;
2139 /* If we first saw a reference to @VER symbol with
2140 non-default visibility, merge that visibility to the
2142 elf_merge_st_other (abfd
, h
, hi
->other
, sec
, TRUE
, dynamic
);
2144 /* See if the new flags lead us to realize that the symbol
2150 if (! bfd_link_executable (info
)
2156 if (hi
->ref_regular
)
2165 /* This routine is used to export all defined symbols into the dynamic
2166 symbol table. It is called via elf_link_hash_traverse. */
2169 _bfd_elf_export_symbol (struct elf_link_hash_entry
*h
, void *data
)
2171 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2173 /* Ignore indirect symbols. These are added by the versioning code. */
2174 if (h
->root
.type
== bfd_link_hash_indirect
)
2177 /* Ignore this if we won't export it. */
2178 if (!eif
->info
->export_dynamic
&& !h
->dynamic
)
2181 if (h
->dynindx
== -1
2182 && (h
->def_regular
|| h
->ref_regular
)
2183 && ! bfd_hide_sym_by_version (eif
->info
->version_info
,
2184 h
->root
.root
.string
))
2186 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2196 /* Look through the symbols which are defined in other shared
2197 libraries and referenced here. Update the list of version
2198 dependencies. This will be put into the .gnu.version_r section.
2199 This function is called via elf_link_hash_traverse. */
2202 _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry
*h
,
2205 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
2206 Elf_Internal_Verneed
*t
;
2207 Elf_Internal_Vernaux
*a
;
2210 /* We only care about symbols defined in shared objects with version
2215 || h
->verinfo
.verdef
== NULL
2216 || (elf_dyn_lib_class (h
->verinfo
.verdef
->vd_bfd
)
2217 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
| DYN_NO_NEEDED
)))
2220 /* See if we already know about this version. */
2221 for (t
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
2225 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
2228 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2229 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
2235 /* This is a new version. Add it to tree we are building. */
2240 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
2243 rinfo
->failed
= TRUE
;
2247 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
2248 t
->vn_nextref
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
2249 elf_tdata (rinfo
->info
->output_bfd
)->verref
= t
;
2253 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
2256 rinfo
->failed
= TRUE
;
2260 /* Note that we are copying a string pointer here, and testing it
2261 above. If bfd_elf_string_from_elf_section is ever changed to
2262 discard the string data when low in memory, this will have to be
2264 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
2266 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
2267 a
->vna_nextptr
= t
->vn_auxptr
;
2269 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
2272 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
2279 /* Return TRUE and set *HIDE to TRUE if the versioned symbol is
2280 hidden. Set *T_P to NULL if there is no match. */
2283 _bfd_elf_link_hide_versioned_symbol (struct bfd_link_info
*info
,
2284 struct elf_link_hash_entry
*h
,
2285 const char *version_p
,
2286 struct bfd_elf_version_tree
**t_p
,
2289 struct bfd_elf_version_tree
*t
;
2291 /* Look for the version. If we find it, it is no longer weak. */
2292 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
2294 if (strcmp (t
->name
, version_p
) == 0)
2298 struct bfd_elf_version_expr
*d
;
2300 len
= version_p
- h
->root
.root
.string
;
2301 alc
= (char *) bfd_malloc (len
);
2304 memcpy (alc
, h
->root
.root
.string
, len
- 1);
2305 alc
[len
- 1] = '\0';
2306 if (alc
[len
- 2] == ELF_VER_CHR
)
2307 alc
[len
- 2] = '\0';
2309 h
->verinfo
.vertree
= t
;
2313 if (t
->globals
.list
!= NULL
)
2314 d
= (*t
->match
) (&t
->globals
, NULL
, alc
);
2316 /* See if there is anything to force this symbol to
2318 if (d
== NULL
&& t
->locals
.list
!= NULL
)
2320 d
= (*t
->match
) (&t
->locals
, NULL
, alc
);
2323 && ! info
->export_dynamic
)
2337 /* Return TRUE if the symbol H is hidden by version script. */
2340 _bfd_elf_link_hide_sym_by_version (struct bfd_link_info
*info
,
2341 struct elf_link_hash_entry
*h
)
2344 bfd_boolean hide
= FALSE
;
2345 const struct elf_backend_data
*bed
2346 = get_elf_backend_data (info
->output_bfd
);
2348 /* Version script only hides symbols defined in regular objects. */
2349 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2352 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
2353 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
2355 struct bfd_elf_version_tree
*t
;
2358 if (*p
== ELF_VER_CHR
)
2362 && _bfd_elf_link_hide_versioned_symbol (info
, h
, p
, &t
, &hide
)
2366 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2371 /* If we don't have a version for this symbol, see if we can find
2373 if (h
->verinfo
.vertree
== NULL
&& info
->version_info
!= NULL
)
2376 = bfd_find_version_for_sym (info
->version_info
,
2377 h
->root
.root
.string
, &hide
);
2378 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2380 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2388 /* Figure out appropriate versions for all the symbols. We may not
2389 have the version number script until we have read all of the input
2390 files, so until that point we don't know which symbols should be
2391 local. This function is called via elf_link_hash_traverse. */
2394 _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry
*h
, void *data
)
2396 struct elf_info_failed
*sinfo
;
2397 struct bfd_link_info
*info
;
2398 const struct elf_backend_data
*bed
;
2399 struct elf_info_failed eif
;
2403 sinfo
= (struct elf_info_failed
*) data
;
2406 /* Fix the symbol flags. */
2409 if (! _bfd_elf_fix_symbol_flags (h
, &eif
))
2412 sinfo
->failed
= TRUE
;
2416 bed
= get_elf_backend_data (info
->output_bfd
);
2418 /* We only need version numbers for symbols defined in regular
2420 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2422 /* Hide symbols defined in discarded input sections. */
2423 if ((h
->root
.type
== bfd_link_hash_defined
2424 || h
->root
.type
== bfd_link_hash_defweak
)
2425 && discarded_section (h
->root
.u
.def
.section
))
2426 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2431 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
2432 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
2434 struct bfd_elf_version_tree
*t
;
2437 if (*p
== ELF_VER_CHR
)
2440 /* If there is no version string, we can just return out. */
2444 if (!_bfd_elf_link_hide_versioned_symbol (info
, h
, p
, &t
, &hide
))
2446 sinfo
->failed
= TRUE
;
2451 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2453 /* If we are building an application, we need to create a
2454 version node for this version. */
2455 if (t
== NULL
&& bfd_link_executable (info
))
2457 struct bfd_elf_version_tree
**pp
;
2460 /* If we aren't going to export this symbol, we don't need
2461 to worry about it. */
2462 if (h
->dynindx
== -1)
2465 t
= (struct bfd_elf_version_tree
*) bfd_zalloc (info
->output_bfd
,
2469 sinfo
->failed
= TRUE
;
2474 t
->name_indx
= (unsigned int) -1;
2478 /* Don't count anonymous version tag. */
2479 if (sinfo
->info
->version_info
!= NULL
2480 && sinfo
->info
->version_info
->vernum
== 0)
2482 for (pp
= &sinfo
->info
->version_info
;
2486 t
->vernum
= version_index
;
2490 h
->verinfo
.vertree
= t
;
2494 /* We could not find the version for a symbol when
2495 generating a shared archive. Return an error. */
2497 /* xgettext:c-format */
2498 (_("%pB: version node not found for symbol %s"),
2499 info
->output_bfd
, h
->root
.root
.string
);
2500 bfd_set_error (bfd_error_bad_value
);
2501 sinfo
->failed
= TRUE
;
2506 /* If we don't have a version for this symbol, see if we can find
2509 && h
->verinfo
.vertree
== NULL
2510 && sinfo
->info
->version_info
!= NULL
)
2513 = bfd_find_version_for_sym (sinfo
->info
->version_info
,
2514 h
->root
.root
.string
, &hide
);
2515 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2516 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2522 /* Read and swap the relocs from the section indicated by SHDR. This
2523 may be either a REL or a RELA section. The relocations are
2524 translated into RELA relocations and stored in INTERNAL_RELOCS,
2525 which should have already been allocated to contain enough space.
2526 The EXTERNAL_RELOCS are a buffer where the external form of the
2527 relocations should be stored.
2529 Returns FALSE if something goes wrong. */
2532 elf_link_read_relocs_from_section (bfd
*abfd
,
2534 Elf_Internal_Shdr
*shdr
,
2535 void *external_relocs
,
2536 Elf_Internal_Rela
*internal_relocs
)
2538 const struct elf_backend_data
*bed
;
2539 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2540 const bfd_byte
*erela
;
2541 const bfd_byte
*erelaend
;
2542 Elf_Internal_Rela
*irela
;
2543 Elf_Internal_Shdr
*symtab_hdr
;
2546 /* Position ourselves at the start of the section. */
2547 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2550 /* Read the relocations. */
2551 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2554 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2555 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
2557 bed
= get_elf_backend_data (abfd
);
2559 /* Convert the external relocations to the internal format. */
2560 if (shdr
->sh_entsize
== bed
->s
->sizeof_rel
)
2561 swap_in
= bed
->s
->swap_reloc_in
;
2562 else if (shdr
->sh_entsize
== bed
->s
->sizeof_rela
)
2563 swap_in
= bed
->s
->swap_reloca_in
;
2566 bfd_set_error (bfd_error_wrong_format
);
2570 erela
= (const bfd_byte
*) external_relocs
;
2571 /* Setting erelaend like this and comparing with <= handles case of
2572 a fuzzed object with sh_size not a multiple of sh_entsize. */
2573 erelaend
= erela
+ shdr
->sh_size
- shdr
->sh_entsize
;
2574 irela
= internal_relocs
;
2575 while (erela
<= erelaend
)
2579 (*swap_in
) (abfd
, erela
, irela
);
2580 r_symndx
= ELF32_R_SYM (irela
->r_info
);
2581 if (bed
->s
->arch_size
== 64)
2585 if ((size_t) r_symndx
>= nsyms
)
2588 /* xgettext:c-format */
2589 (_("%pB: bad reloc symbol index (%#" PRIx64
" >= %#lx)"
2590 " for offset %#" PRIx64
" in section `%pA'"),
2591 abfd
, (uint64_t) r_symndx
, (unsigned long) nsyms
,
2592 (uint64_t) irela
->r_offset
, sec
);
2593 bfd_set_error (bfd_error_bad_value
);
2597 else if (r_symndx
!= STN_UNDEF
)
2600 /* xgettext:c-format */
2601 (_("%pB: non-zero symbol index (%#" PRIx64
")"
2602 " for offset %#" PRIx64
" in section `%pA'"
2603 " when the object file has no symbol table"),
2604 abfd
, (uint64_t) r_symndx
,
2605 (uint64_t) irela
->r_offset
, sec
);
2606 bfd_set_error (bfd_error_bad_value
);
2609 irela
+= bed
->s
->int_rels_per_ext_rel
;
2610 erela
+= shdr
->sh_entsize
;
2616 /* Read and swap the relocs for a section O. They may have been
2617 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2618 not NULL, they are used as buffers to read into. They are known to
2619 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2620 the return value is allocated using either malloc or bfd_alloc,
2621 according to the KEEP_MEMORY argument. If O has two relocation
2622 sections (both REL and RELA relocations), then the REL_HDR
2623 relocations will appear first in INTERNAL_RELOCS, followed by the
2624 RELA_HDR relocations. */
2627 _bfd_elf_link_read_relocs (bfd
*abfd
,
2629 void *external_relocs
,
2630 Elf_Internal_Rela
*internal_relocs
,
2631 bfd_boolean keep_memory
)
2633 void *alloc1
= NULL
;
2634 Elf_Internal_Rela
*alloc2
= NULL
;
2635 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2636 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
2637 Elf_Internal_Rela
*internal_rela_relocs
;
2639 if (esdo
->relocs
!= NULL
)
2640 return esdo
->relocs
;
2642 if (o
->reloc_count
== 0)
2645 if (internal_relocs
== NULL
)
2649 size
= (bfd_size_type
) o
->reloc_count
* sizeof (Elf_Internal_Rela
);
2651 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2653 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2654 if (internal_relocs
== NULL
)
2658 if (external_relocs
== NULL
)
2660 bfd_size_type size
= 0;
2663 size
+= esdo
->rel
.hdr
->sh_size
;
2665 size
+= esdo
->rela
.hdr
->sh_size
;
2667 alloc1
= bfd_malloc (size
);
2670 external_relocs
= alloc1
;
2673 internal_rela_relocs
= internal_relocs
;
2676 if (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rel
.hdr
,
2680 external_relocs
= (((bfd_byte
*) external_relocs
)
2681 + esdo
->rel
.hdr
->sh_size
);
2682 internal_rela_relocs
+= (NUM_SHDR_ENTRIES (esdo
->rel
.hdr
)
2683 * bed
->s
->int_rels_per_ext_rel
);
2687 && (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rela
.hdr
,
2689 internal_rela_relocs
)))
2692 /* Cache the results for next time, if we can. */
2694 esdo
->relocs
= internal_relocs
;
2698 /* Don't free alloc2, since if it was allocated we are passing it
2699 back (under the name of internal_relocs). */
2701 return internal_relocs
;
2708 bfd_release (abfd
, alloc2
);
2715 /* Compute the size of, and allocate space for, REL_HDR which is the
2716 section header for a section containing relocations for O. */
2719 _bfd_elf_link_size_reloc_section (bfd
*abfd
,
2720 struct bfd_elf_section_reloc_data
*reldata
)
2722 Elf_Internal_Shdr
*rel_hdr
= reldata
->hdr
;
2724 /* That allows us to calculate the size of the section. */
2725 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reldata
->count
;
2727 /* The contents field must last into write_object_contents, so we
2728 allocate it with bfd_alloc rather than malloc. Also since we
2729 cannot be sure that the contents will actually be filled in,
2730 we zero the allocated space. */
2731 rel_hdr
->contents
= (unsigned char *) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
2732 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
2735 if (reldata
->hashes
== NULL
&& reldata
->count
)
2737 struct elf_link_hash_entry
**p
;
2739 p
= ((struct elf_link_hash_entry
**)
2740 bfd_zmalloc (reldata
->count
* sizeof (*p
)));
2744 reldata
->hashes
= p
;
2750 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
2751 originated from the section given by INPUT_REL_HDR) to the
2755 _bfd_elf_link_output_relocs (bfd
*output_bfd
,
2756 asection
*input_section
,
2757 Elf_Internal_Shdr
*input_rel_hdr
,
2758 Elf_Internal_Rela
*internal_relocs
,
2759 struct elf_link_hash_entry
**rel_hash
2762 Elf_Internal_Rela
*irela
;
2763 Elf_Internal_Rela
*irelaend
;
2765 struct bfd_elf_section_reloc_data
*output_reldata
;
2766 asection
*output_section
;
2767 const struct elf_backend_data
*bed
;
2768 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2769 struct bfd_elf_section_data
*esdo
;
2771 output_section
= input_section
->output_section
;
2773 bed
= get_elf_backend_data (output_bfd
);
2774 esdo
= elf_section_data (output_section
);
2775 if (esdo
->rel
.hdr
&& esdo
->rel
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2777 output_reldata
= &esdo
->rel
;
2778 swap_out
= bed
->s
->swap_reloc_out
;
2780 else if (esdo
->rela
.hdr
2781 && esdo
->rela
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2783 output_reldata
= &esdo
->rela
;
2784 swap_out
= bed
->s
->swap_reloca_out
;
2789 /* xgettext:c-format */
2790 (_("%pB: relocation size mismatch in %pB section %pA"),
2791 output_bfd
, input_section
->owner
, input_section
);
2792 bfd_set_error (bfd_error_wrong_format
);
2796 erel
= output_reldata
->hdr
->contents
;
2797 erel
+= output_reldata
->count
* input_rel_hdr
->sh_entsize
;
2798 irela
= internal_relocs
;
2799 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
2800 * bed
->s
->int_rels_per_ext_rel
);
2801 while (irela
< irelaend
)
2803 (*swap_out
) (output_bfd
, irela
, erel
);
2804 irela
+= bed
->s
->int_rels_per_ext_rel
;
2805 erel
+= input_rel_hdr
->sh_entsize
;
2808 /* Bump the counter, so that we know where to add the next set of
2810 output_reldata
->count
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
2815 /* Make weak undefined symbols in PIE dynamic. */
2818 _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info
*info
,
2819 struct elf_link_hash_entry
*h
)
2821 if (bfd_link_pie (info
)
2823 && h
->root
.type
== bfd_link_hash_undefweak
)
2824 return bfd_elf_link_record_dynamic_symbol (info
, h
);
2829 /* Fix up the flags for a symbol. This handles various cases which
2830 can only be fixed after all the input files are seen. This is
2831 currently called by both adjust_dynamic_symbol and
2832 assign_sym_version, which is unnecessary but perhaps more robust in
2833 the face of future changes. */
2836 _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry
*h
,
2837 struct elf_info_failed
*eif
)
2839 const struct elf_backend_data
*bed
;
2841 /* If this symbol was mentioned in a non-ELF file, try to set
2842 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2843 permit a non-ELF file to correctly refer to a symbol defined in
2844 an ELF dynamic object. */
2847 while (h
->root
.type
== bfd_link_hash_indirect
)
2848 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2850 if (h
->root
.type
!= bfd_link_hash_defined
2851 && h
->root
.type
!= bfd_link_hash_defweak
)
2854 h
->ref_regular_nonweak
= 1;
2858 if (h
->root
.u
.def
.section
->owner
!= NULL
2859 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2860 == bfd_target_elf_flavour
))
2863 h
->ref_regular_nonweak
= 1;
2869 if (h
->dynindx
== -1
2873 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2882 /* Unfortunately, NON_ELF is only correct if the symbol
2883 was first seen in a non-ELF file. Fortunately, if the symbol
2884 was first seen in an ELF file, we're probably OK unless the
2885 symbol was defined in a non-ELF file. Catch that case here.
2886 FIXME: We're still in trouble if the symbol was first seen in
2887 a dynamic object, and then later in a non-ELF regular object. */
2888 if ((h
->root
.type
== bfd_link_hash_defined
2889 || h
->root
.type
== bfd_link_hash_defweak
)
2891 && (h
->root
.u
.def
.section
->owner
!= NULL
2892 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2893 != bfd_target_elf_flavour
)
2894 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
2895 && !h
->def_dynamic
)))
2899 /* Backend specific symbol fixup. */
2900 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
2901 if (bed
->elf_backend_fixup_symbol
2902 && !(*bed
->elf_backend_fixup_symbol
) (eif
->info
, h
))
2905 /* If this is a final link, and the symbol was defined as a common
2906 symbol in a regular object file, and there was no definition in
2907 any dynamic object, then the linker will have allocated space for
2908 the symbol in a common section but the DEF_REGULAR
2909 flag will not have been set. */
2910 if (h
->root
.type
== bfd_link_hash_defined
2914 && (h
->root
.u
.def
.section
->owner
->flags
& (DYNAMIC
| BFD_PLUGIN
)) == 0)
2917 /* Symbols defined in discarded sections shouldn't be dynamic. */
2918 if (h
->root
.type
== bfd_link_hash_undefined
&& h
->indx
== -3)
2919 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2921 /* If a weak undefined symbol has non-default visibility, we also
2922 hide it from the dynamic linker. */
2923 else if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2924 && h
->root
.type
== bfd_link_hash_undefweak
)
2925 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2927 /* A hidden versioned symbol in executable should be forced local if
2928 it is is locally defined, not referenced by shared library and not
2930 else if (bfd_link_executable (eif
->info
)
2931 && h
->versioned
== versioned_hidden
2932 && !eif
->info
->export_dynamic
2936 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2938 /* If -Bsymbolic was used (which means to bind references to global
2939 symbols to the definition within the shared object), and this
2940 symbol was defined in a regular object, then it actually doesn't
2941 need a PLT entry. Likewise, if the symbol has non-default
2942 visibility. If the symbol has hidden or internal visibility, we
2943 will force it local. */
2944 else if (h
->needs_plt
2945 && bfd_link_pic (eif
->info
)
2946 && is_elf_hash_table (eif
->info
->hash
)
2947 && (SYMBOLIC_BIND (eif
->info
, h
)
2948 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2951 bfd_boolean force_local
;
2953 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
2954 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
2955 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
2958 /* If this is a weak defined symbol in a dynamic object, and we know
2959 the real definition in the dynamic object, copy interesting flags
2960 over to the real definition. */
2961 if (h
->is_weakalias
)
2963 struct elf_link_hash_entry
*def
= weakdef (h
);
2965 /* If the real definition is defined by a regular object file,
2966 don't do anything special. See the longer description in
2967 _bfd_elf_adjust_dynamic_symbol, below. If the def is not
2968 bfd_link_hash_defined as it was when put on the alias list
2969 then it must have originally been a versioned symbol (for
2970 which a non-versioned indirect symbol is created) and later
2971 a definition for the non-versioned symbol is found. In that
2972 case the indirection is flipped with the versioned symbol
2973 becoming an indirect pointing at the non-versioned symbol.
2974 Thus, not an alias any more. */
2975 if (def
->def_regular
2976 || def
->root
.type
!= bfd_link_hash_defined
)
2979 while ((h
= h
->u
.alias
) != def
)
2980 h
->is_weakalias
= 0;
2984 while (h
->root
.type
== bfd_link_hash_indirect
)
2985 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2986 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2987 || h
->root
.type
== bfd_link_hash_defweak
);
2988 BFD_ASSERT (def
->def_dynamic
);
2989 (*bed
->elf_backend_copy_indirect_symbol
) (eif
->info
, def
, h
);
2996 /* Make the backend pick a good value for a dynamic symbol. This is
2997 called via elf_link_hash_traverse, and also calls itself
3001 _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry
*h
, void *data
)
3003 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
3004 struct elf_link_hash_table
*htab
;
3005 const struct elf_backend_data
*bed
;
3007 if (! is_elf_hash_table (eif
->info
->hash
))
3010 /* Ignore indirect symbols. These are added by the versioning code. */
3011 if (h
->root
.type
== bfd_link_hash_indirect
)
3014 /* Fix the symbol flags. */
3015 if (! _bfd_elf_fix_symbol_flags (h
, eif
))
3018 htab
= elf_hash_table (eif
->info
);
3019 bed
= get_elf_backend_data (htab
->dynobj
);
3021 if (h
->root
.type
== bfd_link_hash_undefweak
)
3023 if (eif
->info
->dynamic_undefined_weak
== 0)
3024 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
3025 else if (eif
->info
->dynamic_undefined_weak
> 0
3027 && ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3028 && !bfd_hide_sym_by_version (eif
->info
->version_info
,
3029 h
->root
.root
.string
))
3031 if (!bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
3039 /* If this symbol does not require a PLT entry, and it is not
3040 defined by a dynamic object, or is not referenced by a regular
3041 object, ignore it. We do have to handle a weak defined symbol,
3042 even if no regular object refers to it, if we decided to add it
3043 to the dynamic symbol table. FIXME: Do we normally need to worry
3044 about symbols which are defined by one dynamic object and
3045 referenced by another one? */
3047 && h
->type
!= STT_GNU_IFUNC
3051 && (!h
->is_weakalias
|| weakdef (h
)->dynindx
== -1))))
3053 h
->plt
= elf_hash_table (eif
->info
)->init_plt_offset
;
3057 /* If we've already adjusted this symbol, don't do it again. This
3058 can happen via a recursive call. */
3059 if (h
->dynamic_adjusted
)
3062 /* Don't look at this symbol again. Note that we must set this
3063 after checking the above conditions, because we may look at a
3064 symbol once, decide not to do anything, and then get called
3065 recursively later after REF_REGULAR is set below. */
3066 h
->dynamic_adjusted
= 1;
3068 /* If this is a weak definition, and we know a real definition, and
3069 the real symbol is not itself defined by a regular object file,
3070 then get a good value for the real definition. We handle the
3071 real symbol first, for the convenience of the backend routine.
3073 Note that there is a confusing case here. If the real definition
3074 is defined by a regular object file, we don't get the real symbol
3075 from the dynamic object, but we do get the weak symbol. If the
3076 processor backend uses a COPY reloc, then if some routine in the
3077 dynamic object changes the real symbol, we will not see that
3078 change in the corresponding weak symbol. This is the way other
3079 ELF linkers work as well, and seems to be a result of the shared
3082 I will clarify this issue. Most SVR4 shared libraries define the
3083 variable _timezone and define timezone as a weak synonym. The
3084 tzset call changes _timezone. If you write
3085 extern int timezone;
3087 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
3088 you might expect that, since timezone is a synonym for _timezone,
3089 the same number will print both times. However, if the processor
3090 backend uses a COPY reloc, then actually timezone will be copied
3091 into your process image, and, since you define _timezone
3092 yourself, _timezone will not. Thus timezone and _timezone will
3093 wind up at different memory locations. The tzset call will set
3094 _timezone, leaving timezone unchanged. */
3096 if (h
->is_weakalias
)
3098 struct elf_link_hash_entry
*def
= weakdef (h
);
3100 /* If we get to this point, there is an implicit reference to
3101 the alias by a regular object file via the weak symbol H. */
3102 def
->ref_regular
= 1;
3104 /* Ensure that the backend adjust_dynamic_symbol function sees
3105 the strong alias before H by recursively calling ourselves. */
3106 if (!_bfd_elf_adjust_dynamic_symbol (def
, eif
))
3110 /* If a symbol has no type and no size and does not require a PLT
3111 entry, then we are probably about to do the wrong thing here: we
3112 are probably going to create a COPY reloc for an empty object.
3113 This case can arise when a shared object is built with assembly
3114 code, and the assembly code fails to set the symbol type. */
3116 && h
->type
== STT_NOTYPE
3119 (_("warning: type and size of dynamic symbol `%s' are not defined"),
3120 h
->root
.root
.string
);
3122 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
3131 /* Adjust the dynamic symbol, H, for copy in the dynamic bss section,
3135 _bfd_elf_adjust_dynamic_copy (struct bfd_link_info
*info
,
3136 struct elf_link_hash_entry
*h
,
3139 unsigned int power_of_two
;
3141 asection
*sec
= h
->root
.u
.def
.section
;
3143 /* The section alignment of the definition is the maximum alignment
3144 requirement of symbols defined in the section. Since we don't
3145 know the symbol alignment requirement, we start with the
3146 maximum alignment and check low bits of the symbol address
3147 for the minimum alignment. */
3148 power_of_two
= bfd_section_alignment (sec
);
3149 mask
= ((bfd_vma
) 1 << power_of_two
) - 1;
3150 while ((h
->root
.u
.def
.value
& mask
) != 0)
3156 if (power_of_two
> bfd_section_alignment (dynbss
))
3158 /* Adjust the section alignment if needed. */
3159 if (!bfd_set_section_alignment (dynbss
, power_of_two
))
3163 /* We make sure that the symbol will be aligned properly. */
3164 dynbss
->size
= BFD_ALIGN (dynbss
->size
, mask
+ 1);
3166 /* Define the symbol as being at this point in DYNBSS. */
3167 h
->root
.u
.def
.section
= dynbss
;
3168 h
->root
.u
.def
.value
= dynbss
->size
;
3170 /* Increment the size of DYNBSS to make room for the symbol. */
3171 dynbss
->size
+= h
->size
;
3173 /* No error if extern_protected_data is true. */
3174 if (h
->protected_def
3175 && (!info
->extern_protected_data
3176 || (info
->extern_protected_data
< 0
3177 && !get_elf_backend_data (dynbss
->owner
)->extern_protected_data
)))
3178 info
->callbacks
->einfo
3179 (_("%P: copy reloc against protected `%pT' is dangerous\n"),
3180 h
->root
.root
.string
);
3185 /* Adjust all external symbols pointing into SEC_MERGE sections
3186 to reflect the object merging within the sections. */
3189 _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry
*h
, void *data
)
3193 if ((h
->root
.type
== bfd_link_hash_defined
3194 || h
->root
.type
== bfd_link_hash_defweak
)
3195 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
3196 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
3198 bfd
*output_bfd
= (bfd
*) data
;
3200 h
->root
.u
.def
.value
=
3201 _bfd_merged_section_offset (output_bfd
,
3202 &h
->root
.u
.def
.section
,
3203 elf_section_data (sec
)->sec_info
,
3204 h
->root
.u
.def
.value
);
3210 /* Returns false if the symbol referred to by H should be considered
3211 to resolve local to the current module, and true if it should be
3212 considered to bind dynamically. */
3215 _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
3216 struct bfd_link_info
*info
,
3217 bfd_boolean not_local_protected
)
3219 bfd_boolean binding_stays_local_p
;
3220 const struct elf_backend_data
*bed
;
3221 struct elf_link_hash_table
*hash_table
;
3226 while (h
->root
.type
== bfd_link_hash_indirect
3227 || h
->root
.type
== bfd_link_hash_warning
)
3228 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3230 /* If it was forced local, then clearly it's not dynamic. */
3231 if (h
->dynindx
== -1)
3233 if (h
->forced_local
)
3236 /* Identify the cases where name binding rules say that a
3237 visible symbol resolves locally. */
3238 binding_stays_local_p
= (bfd_link_executable (info
)
3239 || SYMBOLIC_BIND (info
, h
));
3241 switch (ELF_ST_VISIBILITY (h
->other
))
3248 hash_table
= elf_hash_table (info
);
3249 if (!is_elf_hash_table (hash_table
))
3252 bed
= get_elf_backend_data (hash_table
->dynobj
);
3254 /* Proper resolution for function pointer equality may require
3255 that these symbols perhaps be resolved dynamically, even though
3256 we should be resolving them to the current module. */
3257 if (!not_local_protected
|| !bed
->is_function_type (h
->type
))
3258 binding_stays_local_p
= TRUE
;
3265 /* If it isn't defined locally, then clearly it's dynamic. */
3266 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
3269 /* Otherwise, the symbol is dynamic if binding rules don't tell
3270 us that it remains local. */
3271 return !binding_stays_local_p
;
3274 /* Return true if the symbol referred to by H should be considered
3275 to resolve local to the current module, and false otherwise. Differs
3276 from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of
3277 undefined symbols. The two functions are virtually identical except
3278 for the place where dynindx == -1 is tested. If that test is true,
3279 _bfd_elf_dynamic_symbol_p will say the symbol is local, while
3280 _bfd_elf_symbol_refs_local_p will say the symbol is local only for
3282 It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as
3283 !_bfd_elf_symbol_refs_local_p, except that targets differ in their
3284 treatment of undefined weak symbols. For those that do not make
3285 undefined weak symbols dynamic, both functions may return false. */
3288 _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry
*h
,
3289 struct bfd_link_info
*info
,
3290 bfd_boolean local_protected
)
3292 const struct elf_backend_data
*bed
;
3293 struct elf_link_hash_table
*hash_table
;
3295 /* If it's a local sym, of course we resolve locally. */
3299 /* STV_HIDDEN or STV_INTERNAL ones must be local. */
3300 if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
3301 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
3304 /* Forced local symbols resolve locally. */
3305 if (h
->forced_local
)
3308 /* Common symbols that become definitions don't get the DEF_REGULAR
3309 flag set, so test it first, and don't bail out. */
3310 if (ELF_COMMON_DEF_P (h
))
3312 /* If we don't have a definition in a regular file, then we can't
3313 resolve locally. The sym is either undefined or dynamic. */
3314 else if (!h
->def_regular
)
3317 /* Non-dynamic symbols resolve locally. */
3318 if (h
->dynindx
== -1)
3321 /* At this point, we know the symbol is defined and dynamic. In an
3322 executable it must resolve locally, likewise when building symbolic
3323 shared libraries. */
3324 if (bfd_link_executable (info
) || SYMBOLIC_BIND (info
, h
))
3327 /* Now deal with defined dynamic symbols in shared libraries. Ones
3328 with default visibility might not resolve locally. */
3329 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
3332 hash_table
= elf_hash_table (info
);
3333 if (!is_elf_hash_table (hash_table
))
3336 bed
= get_elf_backend_data (hash_table
->dynobj
);
3338 /* If extern_protected_data is false, STV_PROTECTED non-function
3339 symbols are local. */
3340 if ((!info
->extern_protected_data
3341 || (info
->extern_protected_data
< 0
3342 && !bed
->extern_protected_data
))
3343 && !bed
->is_function_type (h
->type
))
3346 /* Function pointer equality tests may require that STV_PROTECTED
3347 symbols be treated as dynamic symbols. If the address of a
3348 function not defined in an executable is set to that function's
3349 plt entry in the executable, then the address of the function in
3350 a shared library must also be the plt entry in the executable. */
3351 return local_protected
;
3354 /* Caches some TLS segment info, and ensures that the TLS segment vma is
3355 aligned. Returns the first TLS output section. */
3357 struct bfd_section
*
3358 _bfd_elf_tls_setup (bfd
*obfd
, struct bfd_link_info
*info
)
3360 struct bfd_section
*sec
, *tls
;
3361 unsigned int align
= 0;
3363 for (sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3364 if ((sec
->flags
& SEC_THREAD_LOCAL
) != 0)
3368 for (; sec
!= NULL
&& (sec
->flags
& SEC_THREAD_LOCAL
) != 0; sec
= sec
->next
)
3369 if (sec
->alignment_power
> align
)
3370 align
= sec
->alignment_power
;
3372 elf_hash_table (info
)->tls_sec
= tls
;
3374 /* Ensure the alignment of the first section (usually .tdata) is the largest
3375 alignment, so that the tls segment starts aligned. */
3377 tls
->alignment_power
= align
;
3382 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
3384 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
3385 Elf_Internal_Sym
*sym
)
3387 const struct elf_backend_data
*bed
;
3389 /* Local symbols do not count, but target specific ones might. */
3390 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
3391 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
3394 bed
= get_elf_backend_data (abfd
);
3395 /* Function symbols do not count. */
3396 if (bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)))
3399 /* If the section is undefined, then so is the symbol. */
3400 if (sym
->st_shndx
== SHN_UNDEF
)
3403 /* If the symbol is defined in the common section, then
3404 it is a common definition and so does not count. */
3405 if (bed
->common_definition (sym
))
3408 /* If the symbol is in a target specific section then we
3409 must rely upon the backend to tell us what it is. */
3410 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
3411 /* FIXME - this function is not coded yet:
3413 return _bfd_is_global_symbol_definition (abfd, sym);
3415 Instead for now assume that the definition is not global,
3416 Even if this is wrong, at least the linker will behave
3417 in the same way that it used to do. */
3423 /* Search the symbol table of the archive element of the archive ABFD
3424 whose archive map contains a mention of SYMDEF, and determine if
3425 the symbol is defined in this element. */
3427 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
3429 Elf_Internal_Shdr
* hdr
;
3433 Elf_Internal_Sym
*isymbuf
;
3434 Elf_Internal_Sym
*isym
;
3435 Elf_Internal_Sym
*isymend
;
3438 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
3442 if (! bfd_check_format (abfd
, bfd_object
))
3445 /* Select the appropriate symbol table. If we don't know if the
3446 object file is an IR object, give linker LTO plugin a chance to
3447 get the correct symbol table. */
3448 if (abfd
->plugin_format
== bfd_plugin_yes
3449 #if BFD_SUPPORTS_PLUGINS
3450 || (abfd
->plugin_format
== bfd_plugin_unknown
3451 && bfd_link_plugin_object_p (abfd
))
3455 /* Use the IR symbol table if the object has been claimed by
3457 abfd
= abfd
->plugin_dummy_bfd
;
3458 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3460 else if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
3461 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3463 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3465 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
3467 /* The sh_info field of the symtab header tells us where the
3468 external symbols start. We don't care about the local symbols. */
3469 if (elf_bad_symtab (abfd
))
3471 extsymcount
= symcount
;
3476 extsymcount
= symcount
- hdr
->sh_info
;
3477 extsymoff
= hdr
->sh_info
;
3480 if (extsymcount
== 0)
3483 /* Read in the symbol table. */
3484 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3486 if (isymbuf
== NULL
)
3489 /* Scan the symbol table looking for SYMDEF. */
3491 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
3495 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3500 if (strcmp (name
, symdef
->name
) == 0)
3502 result
= is_global_data_symbol_definition (abfd
, isym
);
3512 /* Add an entry to the .dynamic table. */
3515 _bfd_elf_add_dynamic_entry (struct bfd_link_info
*info
,
3519 struct elf_link_hash_table
*hash_table
;
3520 const struct elf_backend_data
*bed
;
3522 bfd_size_type newsize
;
3523 bfd_byte
*newcontents
;
3524 Elf_Internal_Dyn dyn
;
3526 hash_table
= elf_hash_table (info
);
3527 if (! is_elf_hash_table (hash_table
))
3530 if (tag
== DT_RELA
|| tag
== DT_REL
)
3531 hash_table
->dynamic_relocs
= TRUE
;
3533 bed
= get_elf_backend_data (hash_table
->dynobj
);
3534 s
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3535 BFD_ASSERT (s
!= NULL
);
3537 newsize
= s
->size
+ bed
->s
->sizeof_dyn
;
3538 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
3539 if (newcontents
== NULL
)
3543 dyn
.d_un
.d_val
= val
;
3544 bed
->s
->swap_dyn_out (hash_table
->dynobj
, &dyn
, newcontents
+ s
->size
);
3547 s
->contents
= newcontents
;
3552 /* Strip zero-sized dynamic sections. */
3555 _bfd_elf_strip_zero_sized_dynamic_sections (struct bfd_link_info
*info
)
3557 struct elf_link_hash_table
*hash_table
;
3558 const struct elf_backend_data
*bed
;
3559 asection
*s
, *sdynamic
, **pp
;
3560 asection
*rela_dyn
, *rel_dyn
;
3561 Elf_Internal_Dyn dyn
;
3562 bfd_byte
*extdyn
, *next
;
3563 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
3564 bfd_boolean strip_zero_sized
;
3565 bfd_boolean strip_zero_sized_plt
;
3567 if (bfd_link_relocatable (info
))
3570 hash_table
= elf_hash_table (info
);
3571 if (!is_elf_hash_table (hash_table
))
3574 if (!hash_table
->dynobj
)
3577 sdynamic
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3581 bed
= get_elf_backend_data (hash_table
->dynobj
);
3582 swap_dyn_in
= bed
->s
->swap_dyn_in
;
3584 strip_zero_sized
= FALSE
;
3585 strip_zero_sized_plt
= FALSE
;
3587 /* Strip zero-sized dynamic sections. */
3588 rela_dyn
= bfd_get_section_by_name (info
->output_bfd
, ".rela.dyn");
3589 rel_dyn
= bfd_get_section_by_name (info
->output_bfd
, ".rel.dyn");
3590 for (pp
= &info
->output_bfd
->sections
; (s
= *pp
) != NULL
;)
3594 || s
== hash_table
->srelplt
->output_section
3595 || s
== hash_table
->splt
->output_section
))
3598 info
->output_bfd
->section_count
--;
3599 strip_zero_sized
= TRUE
;
3604 else if (s
== hash_table
->splt
->output_section
)
3606 s
= hash_table
->splt
;
3607 strip_zero_sized_plt
= TRUE
;
3610 s
= hash_table
->srelplt
;
3611 s
->flags
|= SEC_EXCLUDE
;
3612 s
->output_section
= bfd_abs_section_ptr
;
3617 if (strip_zero_sized_plt
)
3618 for (extdyn
= sdynamic
->contents
;
3619 extdyn
< sdynamic
->contents
+ sdynamic
->size
;
3622 next
= extdyn
+ bed
->s
->sizeof_dyn
;
3623 swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3631 /* Strip DT_PLTRELSZ, DT_JMPREL and DT_PLTREL entries if
3632 the procedure linkage table (the .plt section) has been
3634 memmove (extdyn
, next
,
3635 sdynamic
->size
- (next
- sdynamic
->contents
));
3640 if (strip_zero_sized
)
3642 /* Regenerate program headers. */
3643 elf_seg_map (info
->output_bfd
) = NULL
;
3644 return _bfd_elf_map_sections_to_segments (info
->output_bfd
, info
);
3650 /* Add a DT_NEEDED entry for this dynamic object. Returns -1 on error,
3651 1 if a DT_NEEDED tag already exists, and 0 on success. */
3654 bfd_elf_add_dt_needed_tag (bfd
*abfd
, struct bfd_link_info
*info
)
3656 struct elf_link_hash_table
*hash_table
;
3660 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
3663 hash_table
= elf_hash_table (info
);
3664 soname
= elf_dt_name (abfd
);
3665 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, soname
, FALSE
);
3666 if (strindex
== (size_t) -1)
3669 if (_bfd_elf_strtab_refcount (hash_table
->dynstr
, strindex
) != 1)
3672 const struct elf_backend_data
*bed
;
3675 bed
= get_elf_backend_data (hash_table
->dynobj
);
3676 sdyn
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3678 for (extdyn
= sdyn
->contents
;
3679 extdyn
< sdyn
->contents
+ sdyn
->size
;
3680 extdyn
+= bed
->s
->sizeof_dyn
)
3682 Elf_Internal_Dyn dyn
;
3684 bed
->s
->swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3685 if (dyn
.d_tag
== DT_NEEDED
3686 && dyn
.d_un
.d_val
== strindex
)
3688 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3694 if (!_bfd_elf_link_create_dynamic_sections (hash_table
->dynobj
, info
))
3697 if (!_bfd_elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
3703 /* Return true if SONAME is on the needed list between NEEDED and STOP
3704 (or the end of list if STOP is NULL), and needed by a library that
3708 on_needed_list (const char *soname
,
3709 struct bfd_link_needed_list
*needed
,
3710 struct bfd_link_needed_list
*stop
)
3712 struct bfd_link_needed_list
*look
;
3713 for (look
= needed
; look
!= stop
; look
= look
->next
)
3714 if (strcmp (soname
, look
->name
) == 0
3715 && ((elf_dyn_lib_class (look
->by
) & DYN_AS_NEEDED
) == 0
3716 /* If needed by a library that itself is not directly
3717 needed, recursively check whether that library is
3718 indirectly needed. Since we add DT_NEEDED entries to
3719 the end of the list, library dependencies appear after
3720 the library. Therefore search prior to the current
3721 LOOK, preventing possible infinite recursion. */
3722 || on_needed_list (elf_dt_name (look
->by
), needed
, look
)))
3728 /* Sort symbol by value, section, size, and type. */
3730 elf_sort_symbol (const void *arg1
, const void *arg2
)
3732 const struct elf_link_hash_entry
*h1
;
3733 const struct elf_link_hash_entry
*h2
;
3734 bfd_signed_vma vdiff
;
3739 h1
= *(const struct elf_link_hash_entry
**) arg1
;
3740 h2
= *(const struct elf_link_hash_entry
**) arg2
;
3741 vdiff
= h1
->root
.u
.def
.value
- h2
->root
.u
.def
.value
;
3743 return vdiff
> 0 ? 1 : -1;
3745 sdiff
= h1
->root
.u
.def
.section
->id
- h2
->root
.u
.def
.section
->id
;
3749 /* Sort so that sized symbols are selected over zero size symbols. */
3750 vdiff
= h1
->size
- h2
->size
;
3752 return vdiff
> 0 ? 1 : -1;
3754 /* Sort so that STT_OBJECT is selected over STT_NOTYPE. */
3755 if (h1
->type
!= h2
->type
)
3756 return h1
->type
- h2
->type
;
3758 /* If symbols are properly sized and typed, and multiple strong
3759 aliases are not defined in a shared library by the user we
3760 shouldn't get here. Unfortunately linker script symbols like
3761 __bss_start sometimes match a user symbol defined at the start of
3762 .bss without proper size and type. We'd like to preference the
3763 user symbol over reserved system symbols. Sort on leading
3765 n1
= h1
->root
.root
.string
;
3766 n2
= h2
->root
.root
.string
;
3779 /* Final sort on name selects user symbols like '_u' over reserved
3780 system symbols like '_Z' and also will avoid qsort instability. */
3784 /* This function is used to adjust offsets into .dynstr for
3785 dynamic symbols. This is called via elf_link_hash_traverse. */
3788 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
3790 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3792 if (h
->dynindx
!= -1)
3793 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3797 /* Assign string offsets in .dynstr, update all structures referencing
3801 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
3803 struct elf_link_hash_table
*hash_table
= elf_hash_table (info
);
3804 struct elf_link_local_dynamic_entry
*entry
;
3805 struct elf_strtab_hash
*dynstr
= hash_table
->dynstr
;
3806 bfd
*dynobj
= hash_table
->dynobj
;
3809 const struct elf_backend_data
*bed
;
3812 _bfd_elf_strtab_finalize (dynstr
);
3813 size
= _bfd_elf_strtab_size (dynstr
);
3815 /* Allow the linker to examine the dynsymtab now it's fully populated. */
3817 if (info
->callbacks
->examine_strtab
)
3818 info
->callbacks
->examine_strtab (dynstr
);
3820 bed
= get_elf_backend_data (dynobj
);
3821 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3822 BFD_ASSERT (sdyn
!= NULL
);
3824 /* Update all .dynamic entries referencing .dynstr strings. */
3825 for (extdyn
= sdyn
->contents
;
3826 extdyn
< sdyn
->contents
+ sdyn
->size
;
3827 extdyn
+= bed
->s
->sizeof_dyn
)
3829 Elf_Internal_Dyn dyn
;
3831 bed
->s
->swap_dyn_in (dynobj
, extdyn
, &dyn
);
3835 dyn
.d_un
.d_val
= size
;
3845 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3850 bed
->s
->swap_dyn_out (dynobj
, &dyn
, extdyn
);
3853 /* Now update local dynamic symbols. */
3854 for (entry
= hash_table
->dynlocal
; entry
; entry
= entry
->next
)
3855 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3856 entry
->isym
.st_name
);
3858 /* And the rest of dynamic symbols. */
3859 elf_link_hash_traverse (hash_table
, elf_adjust_dynstr_offsets
, dynstr
);
3861 /* Adjust version definitions. */
3862 if (elf_tdata (output_bfd
)->cverdefs
)
3867 Elf_Internal_Verdef def
;
3868 Elf_Internal_Verdaux defaux
;
3870 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
3874 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3876 p
+= sizeof (Elf_External_Verdef
);
3877 if (def
.vd_aux
!= sizeof (Elf_External_Verdef
))
3879 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3881 _bfd_elf_swap_verdaux_in (output_bfd
,
3882 (Elf_External_Verdaux
*) p
, &defaux
);
3883 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3885 _bfd_elf_swap_verdaux_out (output_bfd
,
3886 &defaux
, (Elf_External_Verdaux
*) p
);
3887 p
+= sizeof (Elf_External_Verdaux
);
3890 while (def
.vd_next
);
3893 /* Adjust version references. */
3894 if (elf_tdata (output_bfd
)->verref
)
3899 Elf_Internal_Verneed need
;
3900 Elf_Internal_Vernaux needaux
;
3902 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
3906 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3908 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3909 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3910 (Elf_External_Verneed
*) p
);
3911 p
+= sizeof (Elf_External_Verneed
);
3912 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3914 _bfd_elf_swap_vernaux_in (output_bfd
,
3915 (Elf_External_Vernaux
*) p
, &needaux
);
3916 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3918 _bfd_elf_swap_vernaux_out (output_bfd
,
3920 (Elf_External_Vernaux
*) p
);
3921 p
+= sizeof (Elf_External_Vernaux
);
3924 while (need
.vn_next
);
3930 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3931 The default is to only match when the INPUT and OUTPUT are exactly
3935 _bfd_elf_default_relocs_compatible (const bfd_target
*input
,
3936 const bfd_target
*output
)
3938 return input
== output
;
3941 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3942 This version is used when different targets for the same architecture
3943 are virtually identical. */
3946 _bfd_elf_relocs_compatible (const bfd_target
*input
,
3947 const bfd_target
*output
)
3949 const struct elf_backend_data
*obed
, *ibed
;
3951 if (input
== output
)
3954 ibed
= xvec_get_elf_backend_data (input
);
3955 obed
= xvec_get_elf_backend_data (output
);
3957 if (ibed
->arch
!= obed
->arch
)
3960 /* If both backends are using this function, deem them compatible. */
3961 return ibed
->relocs_compatible
== obed
->relocs_compatible
;
3964 /* Make a special call to the linker "notice" function to tell it that
3965 we are about to handle an as-needed lib, or have finished
3966 processing the lib. */
3969 _bfd_elf_notice_as_needed (bfd
*ibfd
,
3970 struct bfd_link_info
*info
,
3971 enum notice_asneeded_action act
)
3973 return (*info
->callbacks
->notice
) (info
, NULL
, NULL
, ibfd
, NULL
, act
, 0);
3976 /* Check relocations an ELF object file. */
3979 _bfd_elf_link_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
)
3981 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3982 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3984 /* If this object is the same format as the output object, and it is
3985 not a shared library, then let the backend look through the
3988 This is required to build global offset table entries and to
3989 arrange for dynamic relocs. It is not required for the
3990 particular common case of linking non PIC code, even when linking
3991 against shared libraries, but unfortunately there is no way of
3992 knowing whether an object file has been compiled PIC or not.
3993 Looking through the relocs is not particularly time consuming.
3994 The problem is that we must either (1) keep the relocs in memory,
3995 which causes the linker to require additional runtime memory or
3996 (2) read the relocs twice from the input file, which wastes time.
3997 This would be a good case for using mmap.
3999 I have no idea how to handle linking PIC code into a file of a
4000 different format. It probably can't be done. */
4001 if ((abfd
->flags
& DYNAMIC
) == 0
4002 && is_elf_hash_table (htab
)
4003 && bed
->check_relocs
!= NULL
4004 && elf_object_id (abfd
) == elf_hash_table_id (htab
)
4005 && (*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
4009 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4011 Elf_Internal_Rela
*internal_relocs
;
4014 /* Don't check relocations in excluded sections. Don't do
4015 anything special with non-loaded, non-alloced sections.
4016 In particular, any relocs in such sections should not
4017 affect GOT and PLT reference counting (ie. we don't
4018 allow them to create GOT or PLT entries), there's no
4019 possibility or desire to optimize TLS relocs, and
4020 there's not much point in propagating relocs to shared
4021 libs that the dynamic linker won't relocate. */
4022 if ((o
->flags
& SEC_ALLOC
) == 0
4023 || (o
->flags
& SEC_RELOC
) == 0
4024 || (o
->flags
& SEC_EXCLUDE
) != 0
4025 || o
->reloc_count
== 0
4026 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
4027 && (o
->flags
& SEC_DEBUGGING
) != 0)
4028 || bfd_is_abs_section (o
->output_section
))
4031 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
4033 if (internal_relocs
== NULL
)
4036 ok
= (*bed
->check_relocs
) (abfd
, info
, o
, internal_relocs
);
4038 if (elf_section_data (o
)->relocs
!= internal_relocs
)
4039 free (internal_relocs
);
4049 /* Add symbols from an ELF object file to the linker hash table. */
4052 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
4054 Elf_Internal_Ehdr
*ehdr
;
4055 Elf_Internal_Shdr
*hdr
;
4059 struct elf_link_hash_entry
**sym_hash
;
4060 bfd_boolean dynamic
;
4061 Elf_External_Versym
*extversym
= NULL
;
4062 Elf_External_Versym
*extversym_end
= NULL
;
4063 Elf_External_Versym
*ever
;
4064 struct elf_link_hash_entry
*weaks
;
4065 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
4066 size_t nondeflt_vers_cnt
= 0;
4067 Elf_Internal_Sym
*isymbuf
= NULL
;
4068 Elf_Internal_Sym
*isym
;
4069 Elf_Internal_Sym
*isymend
;
4070 const struct elf_backend_data
*bed
;
4071 bfd_boolean add_needed
;
4072 struct elf_link_hash_table
*htab
;
4073 void *alloc_mark
= NULL
;
4074 struct bfd_hash_entry
**old_table
= NULL
;
4075 unsigned int old_size
= 0;
4076 unsigned int old_count
= 0;
4077 void *old_tab
= NULL
;
4079 struct bfd_link_hash_entry
*old_undefs
= NULL
;
4080 struct bfd_link_hash_entry
*old_undefs_tail
= NULL
;
4081 void *old_strtab
= NULL
;
4084 bfd_boolean just_syms
;
4086 htab
= elf_hash_table (info
);
4087 bed
= get_elf_backend_data (abfd
);
4089 if ((abfd
->flags
& DYNAMIC
) == 0)
4095 /* You can't use -r against a dynamic object. Also, there's no
4096 hope of using a dynamic object which does not exactly match
4097 the format of the output file. */
4098 if (bfd_link_relocatable (info
)
4099 || !is_elf_hash_table (htab
)
4100 || info
->output_bfd
->xvec
!= abfd
->xvec
)
4102 if (bfd_link_relocatable (info
))
4103 bfd_set_error (bfd_error_invalid_operation
);
4105 bfd_set_error (bfd_error_wrong_format
);
4110 ehdr
= elf_elfheader (abfd
);
4111 if (info
->warn_alternate_em
4112 && bed
->elf_machine_code
!= ehdr
->e_machine
4113 && ((bed
->elf_machine_alt1
!= 0
4114 && ehdr
->e_machine
== bed
->elf_machine_alt1
)
4115 || (bed
->elf_machine_alt2
!= 0
4116 && ehdr
->e_machine
== bed
->elf_machine_alt2
)))
4118 /* xgettext:c-format */
4119 (_("alternate ELF machine code found (%d) in %pB, expecting %d"),
4120 ehdr
->e_machine
, abfd
, bed
->elf_machine_code
);
4122 /* As a GNU extension, any input sections which are named
4123 .gnu.warning.SYMBOL are treated as warning symbols for the given
4124 symbol. This differs from .gnu.warning sections, which generate
4125 warnings when they are included in an output file. */
4126 /* PR 12761: Also generate this warning when building shared libraries. */
4127 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4131 name
= bfd_section_name (s
);
4132 if (CONST_STRNEQ (name
, ".gnu.warning."))
4137 name
+= sizeof ".gnu.warning." - 1;
4139 /* If this is a shared object, then look up the symbol
4140 in the hash table. If it is there, and it is already
4141 been defined, then we will not be using the entry
4142 from this shared object, so we don't need to warn.
4143 FIXME: If we see the definition in a regular object
4144 later on, we will warn, but we shouldn't. The only
4145 fix is to keep track of what warnings we are supposed
4146 to emit, and then handle them all at the end of the
4150 struct elf_link_hash_entry
*h
;
4152 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
4154 /* FIXME: What about bfd_link_hash_common? */
4156 && (h
->root
.type
== bfd_link_hash_defined
4157 || h
->root
.type
== bfd_link_hash_defweak
))
4162 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
4166 if (! bfd_get_section_contents (abfd
, s
, msg
, 0, sz
))
4171 if (! (_bfd_generic_link_add_one_symbol
4172 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
4173 FALSE
, bed
->collect
, NULL
)))
4176 if (bfd_link_executable (info
))
4178 /* Clobber the section size so that the warning does
4179 not get copied into the output file. */
4182 /* Also set SEC_EXCLUDE, so that symbols defined in
4183 the warning section don't get copied to the output. */
4184 s
->flags
|= SEC_EXCLUDE
;
4189 just_syms
= ((s
= abfd
->sections
) != NULL
4190 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
);
4195 /* If we are creating a shared library, create all the dynamic
4196 sections immediately. We need to attach them to something,
4197 so we attach them to this BFD, provided it is the right
4198 format and is not from ld --just-symbols. Always create the
4199 dynamic sections for -E/--dynamic-list. FIXME: If there
4200 are no input BFD's of the same format as the output, we can't
4201 make a shared library. */
4203 && (bfd_link_pic (info
)
4204 || (!bfd_link_relocatable (info
)
4206 && (info
->export_dynamic
|| info
->dynamic
)))
4207 && is_elf_hash_table (htab
)
4208 && info
->output_bfd
->xvec
== abfd
->xvec
4209 && !htab
->dynamic_sections_created
)
4211 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
4215 else if (!is_elf_hash_table (htab
))
4219 const char *soname
= NULL
;
4221 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
4222 const Elf_Internal_Phdr
*phdr
;
4223 struct elf_link_loaded_list
*loaded_lib
;
4225 /* ld --just-symbols and dynamic objects don't mix very well.
4226 ld shouldn't allow it. */
4230 /* If this dynamic lib was specified on the command line with
4231 --as-needed in effect, then we don't want to add a DT_NEEDED
4232 tag unless the lib is actually used. Similary for libs brought
4233 in by another lib's DT_NEEDED. When --no-add-needed is used
4234 on a dynamic lib, we don't want to add a DT_NEEDED entry for
4235 any dynamic library in DT_NEEDED tags in the dynamic lib at
4237 add_needed
= (elf_dyn_lib_class (abfd
)
4238 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
4239 | DYN_NO_NEEDED
)) == 0;
4241 s
= bfd_get_section_by_name (abfd
, ".dynamic");
4246 unsigned int elfsec
;
4247 unsigned long shlink
;
4249 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
4256 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
4257 if (elfsec
== SHN_BAD
)
4258 goto error_free_dyn
;
4259 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
4261 for (extdyn
= dynbuf
;
4262 extdyn
<= dynbuf
+ s
->size
- bed
->s
->sizeof_dyn
;
4263 extdyn
+= bed
->s
->sizeof_dyn
)
4265 Elf_Internal_Dyn dyn
;
4267 bed
->s
->swap_dyn_in (abfd
, extdyn
, &dyn
);
4268 if (dyn
.d_tag
== DT_SONAME
)
4270 unsigned int tagv
= dyn
.d_un
.d_val
;
4271 soname
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4273 goto error_free_dyn
;
4275 if (dyn
.d_tag
== DT_NEEDED
)
4277 struct bfd_link_needed_list
*n
, **pn
;
4279 unsigned int tagv
= dyn
.d_un
.d_val
;
4280 size_t amt
= sizeof (struct bfd_link_needed_list
);
4282 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
4283 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4284 if (n
== NULL
|| fnm
== NULL
)
4285 goto error_free_dyn
;
4286 amt
= strlen (fnm
) + 1;
4287 anm
= (char *) bfd_alloc (abfd
, amt
);
4289 goto error_free_dyn
;
4290 memcpy (anm
, fnm
, amt
);
4294 for (pn
= &htab
->needed
; *pn
!= NULL
; pn
= &(*pn
)->next
)
4298 if (dyn
.d_tag
== DT_RUNPATH
)
4300 struct bfd_link_needed_list
*n
, **pn
;
4302 unsigned int tagv
= dyn
.d_un
.d_val
;
4303 size_t amt
= sizeof (struct bfd_link_needed_list
);
4305 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
4306 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4307 if (n
== NULL
|| fnm
== NULL
)
4308 goto error_free_dyn
;
4309 amt
= strlen (fnm
) + 1;
4310 anm
= (char *) bfd_alloc (abfd
, amt
);
4312 goto error_free_dyn
;
4313 memcpy (anm
, fnm
, amt
);
4317 for (pn
= & runpath
;
4323 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
4324 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
4326 struct bfd_link_needed_list
*n
, **pn
;
4328 unsigned int tagv
= dyn
.d_un
.d_val
;
4329 size_t amt
= sizeof (struct bfd_link_needed_list
);
4331 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
4332 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4333 if (n
== NULL
|| fnm
== NULL
)
4334 goto error_free_dyn
;
4335 amt
= strlen (fnm
) + 1;
4336 anm
= (char *) bfd_alloc (abfd
, amt
);
4338 goto error_free_dyn
;
4339 memcpy (anm
, fnm
, amt
);
4349 if (dyn
.d_tag
== DT_AUDIT
)
4351 unsigned int tagv
= dyn
.d_un
.d_val
;
4352 audit
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
4359 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
4360 frees all more recently bfd_alloc'd blocks as well. */
4366 struct bfd_link_needed_list
**pn
;
4367 for (pn
= &htab
->runpath
; *pn
!= NULL
; pn
= &(*pn
)->next
)
4372 /* If we have a PT_GNU_RELRO program header, mark as read-only
4373 all sections contained fully therein. This makes relro
4374 shared library sections appear as they will at run-time. */
4375 phdr
= elf_tdata (abfd
)->phdr
+ elf_elfheader (abfd
)->e_phnum
;
4376 while (phdr
-- > elf_tdata (abfd
)->phdr
)
4377 if (phdr
->p_type
== PT_GNU_RELRO
)
4379 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4381 unsigned int opb
= bfd_octets_per_byte (abfd
, s
);
4383 if ((s
->flags
& SEC_ALLOC
) != 0
4384 && s
->vma
* opb
>= phdr
->p_vaddr
4385 && s
->vma
* opb
+ s
->size
<= phdr
->p_vaddr
+ phdr
->p_memsz
)
4386 s
->flags
|= SEC_READONLY
;
4391 /* We do not want to include any of the sections in a dynamic
4392 object in the output file. We hack by simply clobbering the
4393 list of sections in the BFD. This could be handled more
4394 cleanly by, say, a new section flag; the existing
4395 SEC_NEVER_LOAD flag is not the one we want, because that one
4396 still implies that the section takes up space in the output
4398 bfd_section_list_clear (abfd
);
4400 /* Find the name to use in a DT_NEEDED entry that refers to this
4401 object. If the object has a DT_SONAME entry, we use it.
4402 Otherwise, if the generic linker stuck something in
4403 elf_dt_name, we use that. Otherwise, we just use the file
4405 if (soname
== NULL
|| *soname
== '\0')
4407 soname
= elf_dt_name (abfd
);
4408 if (soname
== NULL
|| *soname
== '\0')
4409 soname
= bfd_get_filename (abfd
);
4412 /* Save the SONAME because sometimes the linker emulation code
4413 will need to know it. */
4414 elf_dt_name (abfd
) = soname
;
4416 /* If we have already included this dynamic object in the
4417 link, just ignore it. There is no reason to include a
4418 particular dynamic object more than once. */
4419 for (loaded_lib
= htab
->dyn_loaded
;
4421 loaded_lib
= loaded_lib
->next
)
4423 if (strcmp (elf_dt_name (loaded_lib
->abfd
), soname
) == 0)
4427 /* Create dynamic sections for backends that require that be done
4428 before setup_gnu_properties. */
4430 && !_bfd_elf_link_create_dynamic_sections (abfd
, info
))
4433 /* Save the DT_AUDIT entry for the linker emulation code. */
4434 elf_dt_audit (abfd
) = audit
;
4437 /* If this is a dynamic object, we always link against the .dynsym
4438 symbol table, not the .symtab symbol table. The dynamic linker
4439 will only see the .dynsym symbol table, so there is no reason to
4440 look at .symtab for a dynamic object. */
4442 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
4443 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4445 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
4447 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
4449 /* The sh_info field of the symtab header tells us where the
4450 external symbols start. We don't care about the local symbols at
4452 if (elf_bad_symtab (abfd
))
4454 extsymcount
= symcount
;
4459 extsymcount
= symcount
- hdr
->sh_info
;
4460 extsymoff
= hdr
->sh_info
;
4463 sym_hash
= elf_sym_hashes (abfd
);
4464 if (extsymcount
!= 0)
4466 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
4468 if (isymbuf
== NULL
)
4471 if (sym_hash
== NULL
)
4473 /* We store a pointer to the hash table entry for each
4475 size_t amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
4476 sym_hash
= (struct elf_link_hash_entry
**) bfd_zalloc (abfd
, amt
);
4477 if (sym_hash
== NULL
)
4478 goto error_free_sym
;
4479 elf_sym_hashes (abfd
) = sym_hash
;
4485 /* Read in any version definitions. */
4486 if (!_bfd_elf_slurp_version_tables (abfd
,
4487 info
->default_imported_symver
))
4488 goto error_free_sym
;
4490 /* Read in the symbol versions, but don't bother to convert them
4491 to internal format. */
4492 if (elf_dynversym (abfd
) != 0)
4494 Elf_Internal_Shdr
*versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
4495 bfd_size_type amt
= versymhdr
->sh_size
;
4497 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0)
4498 goto error_free_sym
;
4499 extversym
= (Elf_External_Versym
*)
4500 _bfd_malloc_and_read (abfd
, amt
, amt
);
4501 if (extversym
== NULL
)
4502 goto error_free_sym
;
4503 extversym_end
= extversym
+ amt
/ sizeof (*extversym
);
4507 /* If we are loading an as-needed shared lib, save the symbol table
4508 state before we start adding symbols. If the lib turns out
4509 to be unneeded, restore the state. */
4510 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4515 for (entsize
= 0, i
= 0; i
< htab
->root
.table
.size
; i
++)
4517 struct bfd_hash_entry
*p
;
4518 struct elf_link_hash_entry
*h
;
4520 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4522 h
= (struct elf_link_hash_entry
*) p
;
4523 entsize
+= htab
->root
.table
.entsize
;
4524 if (h
->root
.type
== bfd_link_hash_warning
)
4526 entsize
+= htab
->root
.table
.entsize
;
4527 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4529 if (h
->root
.type
== bfd_link_hash_common
)
4530 entsize
+= sizeof (*h
->root
.u
.c
.p
);
4534 tabsize
= htab
->root
.table
.size
* sizeof (struct bfd_hash_entry
*);
4535 old_tab
= bfd_malloc (tabsize
+ entsize
);
4536 if (old_tab
== NULL
)
4537 goto error_free_vers
;
4539 /* Remember the current objalloc pointer, so that all mem for
4540 symbols added can later be reclaimed. */
4541 alloc_mark
= bfd_hash_allocate (&htab
->root
.table
, 1);
4542 if (alloc_mark
== NULL
)
4543 goto error_free_vers
;
4545 /* Make a special call to the linker "notice" function to
4546 tell it that we are about to handle an as-needed lib. */
4547 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_as_needed
))
4548 goto error_free_vers
;
4550 /* Clone the symbol table. Remember some pointers into the
4551 symbol table, and dynamic symbol count. */
4552 old_ent
= (char *) old_tab
+ tabsize
;
4553 memcpy (old_tab
, htab
->root
.table
.table
, tabsize
);
4554 old_undefs
= htab
->root
.undefs
;
4555 old_undefs_tail
= htab
->root
.undefs_tail
;
4556 old_table
= htab
->root
.table
.table
;
4557 old_size
= htab
->root
.table
.size
;
4558 old_count
= htab
->root
.table
.count
;
4560 if (htab
->dynstr
!= NULL
)
4562 old_strtab
= _bfd_elf_strtab_save (htab
->dynstr
);
4563 if (old_strtab
== NULL
)
4564 goto error_free_vers
;
4567 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4569 struct bfd_hash_entry
*p
;
4570 struct elf_link_hash_entry
*h
;
4572 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4574 h
= (struct elf_link_hash_entry
*) p
;
4575 memcpy (old_ent
, h
, htab
->root
.table
.entsize
);
4576 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4577 if (h
->root
.type
== bfd_link_hash_warning
)
4579 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4580 memcpy (old_ent
, h
, htab
->root
.table
.entsize
);
4581 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4583 if (h
->root
.type
== bfd_link_hash_common
)
4585 memcpy (old_ent
, h
->root
.u
.c
.p
, sizeof (*h
->root
.u
.c
.p
));
4586 old_ent
= (char *) old_ent
+ sizeof (*h
->root
.u
.c
.p
);
4593 if (extversym
== NULL
)
4595 else if (extversym
+ extsymoff
< extversym_end
)
4596 ever
= extversym
+ extsymoff
;
4599 /* xgettext:c-format */
4600 _bfd_error_handler (_("%pB: invalid version offset %lx (max %lx)"),
4601 abfd
, (long) extsymoff
,
4602 (long) (extversym_end
- extversym
) / sizeof (* extversym
));
4603 bfd_set_error (bfd_error_bad_value
);
4604 goto error_free_vers
;
4607 if (!bfd_link_relocatable (info
)
4608 && abfd
->lto_slim_object
)
4611 (_("%pB: plugin needed to handle lto object"), abfd
);
4614 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
4616 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
4620 asection
*sec
, *new_sec
;
4623 struct elf_link_hash_entry
*h
;
4624 struct elf_link_hash_entry
*hi
;
4625 bfd_boolean definition
;
4626 bfd_boolean size_change_ok
;
4627 bfd_boolean type_change_ok
;
4628 bfd_boolean new_weak
;
4629 bfd_boolean old_weak
;
4632 bfd_boolean discarded
;
4633 unsigned int old_alignment
;
4634 unsigned int shindex
;
4636 bfd_boolean matched
;
4640 flags
= BSF_NO_FLAGS
;
4642 value
= isym
->st_value
;
4643 common
= bed
->common_definition (isym
);
4644 if (common
&& info
->inhibit_common_definition
)
4646 /* Treat common symbol as undefined for --no-define-common. */
4647 isym
->st_shndx
= SHN_UNDEF
;
4652 bind
= ELF_ST_BIND (isym
->st_info
);
4656 /* This should be impossible, since ELF requires that all
4657 global symbols follow all local symbols, and that sh_info
4658 point to the first global symbol. Unfortunately, Irix 5
4660 if (elf_bad_symtab (abfd
))
4663 /* If we aren't prepared to handle locals within the globals
4664 then we'll likely segfault on a NULL symbol hash if the
4665 symbol is ever referenced in relocations. */
4666 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
4667 name
= bfd_elf_string_from_elf_section (abfd
, shindex
, hdr
->sh_name
);
4668 _bfd_error_handler (_("%pB: %s local symbol at index %lu"
4669 " (>= sh_info of %lu)"),
4670 abfd
, name
, (long) (isym
- isymbuf
+ extsymoff
),
4673 /* Dynamic object relocations are not processed by ld, so
4674 ld won't run into the problem mentioned above. */
4677 bfd_set_error (bfd_error_bad_value
);
4678 goto error_free_vers
;
4681 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
4689 case STB_GNU_UNIQUE
:
4690 flags
= BSF_GNU_UNIQUE
;
4694 /* Leave it up to the processor backend. */
4698 if (isym
->st_shndx
== SHN_UNDEF
)
4699 sec
= bfd_und_section_ptr
;
4700 else if (isym
->st_shndx
== SHN_ABS
)
4701 sec
= bfd_abs_section_ptr
;
4702 else if (isym
->st_shndx
== SHN_COMMON
)
4704 sec
= bfd_com_section_ptr
;
4705 /* What ELF calls the size we call the value. What ELF
4706 calls the value we call the alignment. */
4707 value
= isym
->st_size
;
4711 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4713 sec
= bfd_abs_section_ptr
;
4714 else if (discarded_section (sec
))
4716 /* Symbols from discarded section are undefined. We keep
4718 sec
= bfd_und_section_ptr
;
4720 isym
->st_shndx
= SHN_UNDEF
;
4722 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
4726 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
4729 goto error_free_vers
;
4731 if (isym
->st_shndx
== SHN_COMMON
4732 && (abfd
->flags
& BFD_PLUGIN
) != 0)
4734 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
4738 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
4740 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
4742 goto error_free_vers
;
4746 else if (isym
->st_shndx
== SHN_COMMON
4747 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4748 && !bfd_link_relocatable (info
))
4750 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
4754 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
4755 | SEC_LINKER_CREATED
);
4756 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
4758 goto error_free_vers
;
4762 else if (bed
->elf_add_symbol_hook
)
4764 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
4766 goto error_free_vers
;
4768 /* The hook function sets the name to NULL if this symbol
4769 should be skipped for some reason. */
4774 /* Sanity check that all possibilities were handled. */
4778 /* Silently discard TLS symbols from --just-syms. There's
4779 no way to combine a static TLS block with a new TLS block
4780 for this executable. */
4781 if (ELF_ST_TYPE (isym
->st_info
) == STT_TLS
4782 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
4785 if (bfd_is_und_section (sec
)
4786 || bfd_is_com_section (sec
))
4791 size_change_ok
= FALSE
;
4792 type_change_ok
= bed
->type_change_ok
;
4799 if (is_elf_hash_table (htab
))
4801 Elf_Internal_Versym iver
;
4802 unsigned int vernum
= 0;
4807 if (info
->default_imported_symver
)
4808 /* Use the default symbol version created earlier. */
4809 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
4813 else if (ever
>= extversym_end
)
4815 /* xgettext:c-format */
4816 _bfd_error_handler (_("%pB: not enough version information"),
4818 bfd_set_error (bfd_error_bad_value
);
4819 goto error_free_vers
;
4822 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
4824 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
4826 /* If this is a hidden symbol, or if it is not version
4827 1, we append the version name to the symbol name.
4828 However, we do not modify a non-hidden absolute symbol
4829 if it is not a function, because it might be the version
4830 symbol itself. FIXME: What if it isn't? */
4831 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
4833 && (!bfd_is_abs_section (sec
)
4834 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4837 size_t namelen
, verlen
, newlen
;
4840 if (isym
->st_shndx
!= SHN_UNDEF
)
4842 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4844 else if (vernum
> 1)
4846 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4853 /* xgettext:c-format */
4854 (_("%pB: %s: invalid version %u (max %d)"),
4856 elf_tdata (abfd
)->cverdefs
);
4857 bfd_set_error (bfd_error_bad_value
);
4858 goto error_free_vers
;
4863 /* We cannot simply test for the number of
4864 entries in the VERNEED section since the
4865 numbers for the needed versions do not start
4867 Elf_Internal_Verneed
*t
;
4870 for (t
= elf_tdata (abfd
)->verref
;
4874 Elf_Internal_Vernaux
*a
;
4876 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4878 if (a
->vna_other
== vernum
)
4880 verstr
= a
->vna_nodename
;
4890 /* xgettext:c-format */
4891 (_("%pB: %s: invalid needed version %d"),
4892 abfd
, name
, vernum
);
4893 bfd_set_error (bfd_error_bad_value
);
4894 goto error_free_vers
;
4898 namelen
= strlen (name
);
4899 verlen
= strlen (verstr
);
4900 newlen
= namelen
+ verlen
+ 2;
4901 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4902 && isym
->st_shndx
!= SHN_UNDEF
)
4905 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4906 if (newname
== NULL
)
4907 goto error_free_vers
;
4908 memcpy (newname
, name
, namelen
);
4909 p
= newname
+ namelen
;
4911 /* If this is a defined non-hidden version symbol,
4912 we add another @ to the name. This indicates the
4913 default version of the symbol. */
4914 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4915 && isym
->st_shndx
!= SHN_UNDEF
)
4917 memcpy (p
, verstr
, verlen
+ 1);
4922 /* If this symbol has default visibility and the user has
4923 requested we not re-export it, then mark it as hidden. */
4924 if (!bfd_is_und_section (sec
)
4927 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_INTERNAL
)
4928 isym
->st_other
= (STV_HIDDEN
4929 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
4931 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
4932 sym_hash
, &old_bfd
, &old_weak
,
4933 &old_alignment
, &skip
, &override
,
4934 &type_change_ok
, &size_change_ok
,
4936 goto error_free_vers
;
4941 /* Override a definition only if the new symbol matches the
4943 if (override
&& matched
)
4947 while (h
->root
.type
== bfd_link_hash_indirect
4948 || h
->root
.type
== bfd_link_hash_warning
)
4949 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4951 if (elf_tdata (abfd
)->verdef
!= NULL
4954 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4957 if (! (_bfd_generic_link_add_one_symbol
4958 (info
, override
? override
: abfd
, name
, flags
, sec
, value
,
4959 NULL
, FALSE
, bed
->collect
,
4960 (struct bfd_link_hash_entry
**) sym_hash
)))
4961 goto error_free_vers
;
4964 /* We need to make sure that indirect symbol dynamic flags are
4967 while (h
->root
.type
== bfd_link_hash_indirect
4968 || h
->root
.type
== bfd_link_hash_warning
)
4969 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4971 /* Setting the index to -3 tells elf_link_output_extsym that
4972 this symbol is defined in a discarded section. */
4978 new_weak
= (flags
& BSF_WEAK
) != 0;
4982 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4983 && is_elf_hash_table (htab
)
4984 && h
->u
.alias
== NULL
)
4986 /* Keep a list of all weak defined non function symbols from
4987 a dynamic object, using the alias field. Later in this
4988 function we will set the alias field to the correct
4989 value. We only put non-function symbols from dynamic
4990 objects on this list, because that happens to be the only
4991 time we need to know the normal symbol corresponding to a
4992 weak symbol, and the information is time consuming to
4993 figure out. If the alias field is not already NULL,
4994 then this symbol was already defined by some previous
4995 dynamic object, and we will be using that previous
4996 definition anyhow. */
5002 /* Set the alignment of a common symbol. */
5003 if ((common
|| bfd_is_com_section (sec
))
5004 && h
->root
.type
== bfd_link_hash_common
)
5009 align
= bfd_log2 (isym
->st_value
);
5012 /* The new symbol is a common symbol in a shared object.
5013 We need to get the alignment from the section. */
5014 align
= new_sec
->alignment_power
;
5016 if (align
> old_alignment
)
5017 h
->root
.u
.c
.p
->alignment_power
= align
;
5019 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
5022 if (is_elf_hash_table (htab
))
5024 /* Set a flag in the hash table entry indicating the type of
5025 reference or definition we just found. A dynamic symbol
5026 is one which is referenced or defined by both a regular
5027 object and a shared object. */
5028 bfd_boolean dynsym
= FALSE
;
5030 /* Plugin symbols aren't normal. Don't set def/ref flags. */
5031 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
5038 if (bind
!= STB_WEAK
)
5039 h
->ref_regular_nonweak
= 1;
5056 hi
->ref_dynamic
= 1;
5061 hi
->def_dynamic
= 1;
5065 /* If an indirect symbol has been forced local, don't
5066 make the real symbol dynamic. */
5067 if (h
!= hi
&& hi
->forced_local
)
5071 if (bfd_link_dll (info
)
5081 && weakdef (h
)->dynindx
!= -1))
5085 /* Check to see if we need to add an indirect symbol for
5086 the default name. */
5088 || (!override
&& h
->root
.type
== bfd_link_hash_common
))
5090 && hi
->versioned
== versioned_hidden
))
5091 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
5092 sec
, value
, &old_bfd
, &dynsym
))
5093 goto error_free_vers
;
5095 /* Check the alignment when a common symbol is involved. This
5096 can change when a common symbol is overridden by a normal
5097 definition or a common symbol is ignored due to the old
5098 normal definition. We need to make sure the maximum
5099 alignment is maintained. */
5100 if ((old_alignment
|| common
)
5101 && h
->root
.type
!= bfd_link_hash_common
)
5103 unsigned int common_align
;
5104 unsigned int normal_align
;
5105 unsigned int symbol_align
;
5109 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
5110 || h
->root
.type
== bfd_link_hash_defweak
);
5112 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
5113 if (h
->root
.u
.def
.section
->owner
!= NULL
5114 && (h
->root
.u
.def
.section
->owner
->flags
5115 & (DYNAMIC
| BFD_PLUGIN
)) == 0)
5117 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
5118 if (normal_align
> symbol_align
)
5119 normal_align
= symbol_align
;
5122 normal_align
= symbol_align
;
5126 common_align
= old_alignment
;
5127 common_bfd
= old_bfd
;
5132 common_align
= bfd_log2 (isym
->st_value
);
5134 normal_bfd
= old_bfd
;
5137 if (normal_align
< common_align
)
5139 /* PR binutils/2735 */
5140 if (normal_bfd
== NULL
)
5142 /* xgettext:c-format */
5143 (_("warning: alignment %u of common symbol `%s' in %pB is"
5144 " greater than the alignment (%u) of its section %pA"),
5145 1 << common_align
, name
, common_bfd
,
5146 1 << normal_align
, h
->root
.u
.def
.section
);
5149 /* xgettext:c-format */
5150 (_("warning: alignment %u of symbol `%s' in %pB"
5151 " is smaller than %u in %pB"),
5152 1 << normal_align
, name
, normal_bfd
,
5153 1 << common_align
, common_bfd
);
5157 /* Remember the symbol size if it isn't undefined. */
5158 if (isym
->st_size
!= 0
5159 && isym
->st_shndx
!= SHN_UNDEF
5160 && (definition
|| h
->size
== 0))
5163 && h
->size
!= isym
->st_size
5164 && ! size_change_ok
)
5166 /* xgettext:c-format */
5167 (_("warning: size of symbol `%s' changed"
5168 " from %" PRIu64
" in %pB to %" PRIu64
" in %pB"),
5169 name
, (uint64_t) h
->size
, old_bfd
,
5170 (uint64_t) isym
->st_size
, abfd
);
5172 h
->size
= isym
->st_size
;
5175 /* If this is a common symbol, then we always want H->SIZE
5176 to be the size of the common symbol. The code just above
5177 won't fix the size if a common symbol becomes larger. We
5178 don't warn about a size change here, because that is
5179 covered by --warn-common. Allow changes between different
5181 if (h
->root
.type
== bfd_link_hash_common
)
5182 h
->size
= h
->root
.u
.c
.size
;
5184 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
5185 && ((definition
&& !new_weak
)
5186 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
5187 || h
->type
== STT_NOTYPE
))
5189 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
5191 /* Turn an IFUNC symbol from a DSO into a normal FUNC
5193 if (type
== STT_GNU_IFUNC
5194 && (abfd
->flags
& DYNAMIC
) != 0)
5197 if (h
->type
!= type
)
5199 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
5200 /* xgettext:c-format */
5202 (_("warning: type of symbol `%s' changed"
5203 " from %d to %d in %pB"),
5204 name
, h
->type
, type
, abfd
);
5210 /* Merge st_other field. */
5211 elf_merge_st_other (abfd
, h
, isym
->st_other
, sec
,
5212 definition
, dynamic
);
5214 /* We don't want to make debug symbol dynamic. */
5216 && (sec
->flags
& SEC_DEBUGGING
)
5217 && !bfd_link_relocatable (info
))
5220 /* Nor should we make plugin symbols dynamic. */
5221 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
5226 h
->target_internal
= isym
->st_target_internal
;
5227 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
5230 if (definition
&& !dynamic
)
5232 char *p
= strchr (name
, ELF_VER_CHR
);
5233 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
5235 /* Queue non-default versions so that .symver x, x@FOO
5236 aliases can be checked. */
5239 size_t amt
= ((isymend
- isym
+ 1)
5240 * sizeof (struct elf_link_hash_entry
*));
5242 = (struct elf_link_hash_entry
**) bfd_malloc (amt
);
5244 goto error_free_vers
;
5246 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
5250 if (dynsym
&& h
->dynindx
== -1)
5252 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
5253 goto error_free_vers
;
5255 && weakdef (h
)->dynindx
== -1)
5257 if (!bfd_elf_link_record_dynamic_symbol (info
, weakdef (h
)))
5258 goto error_free_vers
;
5261 else if (h
->dynindx
!= -1)
5262 /* If the symbol already has a dynamic index, but
5263 visibility says it should not be visible, turn it into
5265 switch (ELF_ST_VISIBILITY (h
->other
))
5269 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
5277 && h
->root
.type
!= bfd_link_hash_indirect
5279 && h
->ref_regular_nonweak
)
5281 && (old_bfd
->flags
& BFD_PLUGIN
) != 0
5282 && !info
->lto_all_symbols_read
5283 && bind
!= STB_WEAK
)
5284 || (h
->ref_dynamic_nonweak
5285 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
5286 && !on_needed_list (elf_dt_name (abfd
),
5287 htab
->needed
, NULL
))))
5289 const char *soname
= elf_dt_name (abfd
);
5291 info
->callbacks
->minfo ("%!", soname
, old_bfd
,
5292 h
->root
.root
.string
);
5294 /* A symbol from a library loaded via DT_NEEDED of some
5295 other library is referenced by a regular object.
5296 Add a DT_NEEDED entry for it. Issue an error if
5297 --no-add-needed is used and the reference was not
5300 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
5303 /* xgettext:c-format */
5304 (_("%pB: undefined reference to symbol '%s'"),
5306 bfd_set_error (bfd_error_missing_dso
);
5307 goto error_free_vers
;
5310 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
5311 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
5313 /* Create dynamic sections for backends that require
5314 that be done before setup_gnu_properties. */
5315 if (!_bfd_elf_link_create_dynamic_sections (abfd
, info
))
5322 if (info
->lto_plugin_active
5323 && !bfd_link_relocatable (info
)
5324 && (abfd
->flags
& BFD_PLUGIN
) == 0
5330 if (bed
->s
->arch_size
== 32)
5335 /* If linker plugin is enabled, set non_ir_ref_regular on symbols
5336 referenced in regular objects so that linker plugin will get
5337 the correct symbol resolution. */
5339 sym_hash
= elf_sym_hashes (abfd
);
5340 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5342 Elf_Internal_Rela
*internal_relocs
;
5343 Elf_Internal_Rela
*rel
, *relend
;
5345 /* Don't check relocations in excluded sections. */
5346 if ((s
->flags
& SEC_RELOC
) == 0
5347 || s
->reloc_count
== 0
5348 || (s
->flags
& SEC_EXCLUDE
) != 0
5349 || ((info
->strip
== strip_all
5350 || info
->strip
== strip_debugger
)
5351 && (s
->flags
& SEC_DEBUGGING
) != 0))
5354 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, s
, NULL
,
5357 if (internal_relocs
== NULL
)
5358 goto error_free_vers
;
5360 rel
= internal_relocs
;
5361 relend
= rel
+ s
->reloc_count
;
5362 for ( ; rel
< relend
; rel
++)
5364 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
5365 struct elf_link_hash_entry
*h
;
5367 /* Skip local symbols. */
5368 if (r_symndx
< extsymoff
)
5371 h
= sym_hash
[r_symndx
- extsymoff
];
5373 h
->root
.non_ir_ref_regular
= 1;
5376 if (elf_section_data (s
)->relocs
!= internal_relocs
)
5377 free (internal_relocs
);
5386 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
5390 /* Restore the symbol table. */
5391 old_ent
= (char *) old_tab
+ tabsize
;
5392 memset (elf_sym_hashes (abfd
), 0,
5393 extsymcount
* sizeof (struct elf_link_hash_entry
*));
5394 htab
->root
.table
.table
= old_table
;
5395 htab
->root
.table
.size
= old_size
;
5396 htab
->root
.table
.count
= old_count
;
5397 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
5398 htab
->root
.undefs
= old_undefs
;
5399 htab
->root
.undefs_tail
= old_undefs_tail
;
5400 if (htab
->dynstr
!= NULL
)
5401 _bfd_elf_strtab_restore (htab
->dynstr
, old_strtab
);
5404 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
5406 struct bfd_hash_entry
*p
;
5407 struct elf_link_hash_entry
*h
;
5408 unsigned int non_ir_ref_dynamic
;
5410 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
5412 /* Preserve non_ir_ref_dynamic so that this symbol
5413 will be exported when the dynamic lib becomes needed
5414 in the second pass. */
5415 h
= (struct elf_link_hash_entry
*) p
;
5416 if (h
->root
.type
== bfd_link_hash_warning
)
5417 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5418 non_ir_ref_dynamic
= h
->root
.non_ir_ref_dynamic
;
5420 h
= (struct elf_link_hash_entry
*) p
;
5421 memcpy (h
, old_ent
, htab
->root
.table
.entsize
);
5422 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
5423 if (h
->root
.type
== bfd_link_hash_warning
)
5425 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5426 memcpy (h
, old_ent
, htab
->root
.table
.entsize
);
5427 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
5429 if (h
->root
.type
== bfd_link_hash_common
)
5431 memcpy (h
->root
.u
.c
.p
, old_ent
, sizeof (*h
->root
.u
.c
.p
));
5432 old_ent
= (char *) old_ent
+ sizeof (*h
->root
.u
.c
.p
);
5434 h
->root
.non_ir_ref_dynamic
= non_ir_ref_dynamic
;
5438 /* Make a special call to the linker "notice" function to
5439 tell it that symbols added for crefs may need to be removed. */
5440 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_not_needed
))
5441 goto error_free_vers
;
5444 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
5446 free (nondeflt_vers
);
5450 if (old_tab
!= NULL
)
5452 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_needed
))
5453 goto error_free_vers
;
5458 /* Now that all the symbols from this input file are created, if
5459 not performing a relocatable link, handle .symver foo, foo@BAR
5460 such that any relocs against foo become foo@BAR. */
5461 if (!bfd_link_relocatable (info
) && nondeflt_vers
!= NULL
)
5465 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
5467 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
5468 char *shortname
, *p
;
5471 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
5473 || (h
->root
.type
!= bfd_link_hash_defined
5474 && h
->root
.type
!= bfd_link_hash_defweak
))
5477 amt
= p
- h
->root
.root
.string
;
5478 shortname
= (char *) bfd_malloc (amt
+ 1);
5480 goto error_free_vers
;
5481 memcpy (shortname
, h
->root
.root
.string
, amt
);
5482 shortname
[amt
] = '\0';
5484 hi
= (struct elf_link_hash_entry
*)
5485 bfd_link_hash_lookup (&htab
->root
, shortname
,
5486 FALSE
, FALSE
, FALSE
);
5488 && hi
->root
.type
== h
->root
.type
5489 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
5490 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
5492 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
5493 hi
->root
.type
= bfd_link_hash_indirect
;
5494 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
5495 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
5496 sym_hash
= elf_sym_hashes (abfd
);
5498 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
5499 if (sym_hash
[symidx
] == hi
)
5501 sym_hash
[symidx
] = h
;
5507 free (nondeflt_vers
);
5508 nondeflt_vers
= NULL
;
5511 /* Now set the alias field correctly for all the weak defined
5512 symbols we found. The only way to do this is to search all the
5513 symbols. Since we only need the information for non functions in
5514 dynamic objects, that's the only time we actually put anything on
5515 the list WEAKS. We need this information so that if a regular
5516 object refers to a symbol defined weakly in a dynamic object, the
5517 real symbol in the dynamic object is also put in the dynamic
5518 symbols; we also must arrange for both symbols to point to the
5519 same memory location. We could handle the general case of symbol
5520 aliasing, but a general symbol alias can only be generated in
5521 assembler code, handling it correctly would be very time
5522 consuming, and other ELF linkers don't handle general aliasing
5526 struct elf_link_hash_entry
**hpp
;
5527 struct elf_link_hash_entry
**hppend
;
5528 struct elf_link_hash_entry
**sorted_sym_hash
;
5529 struct elf_link_hash_entry
*h
;
5530 size_t sym_count
, amt
;
5532 /* Since we have to search the whole symbol list for each weak
5533 defined symbol, search time for N weak defined symbols will be
5534 O(N^2). Binary search will cut it down to O(NlogN). */
5535 amt
= extsymcount
* sizeof (*sorted_sym_hash
);
5536 sorted_sym_hash
= bfd_malloc (amt
);
5537 if (sorted_sym_hash
== NULL
)
5539 sym_hash
= sorted_sym_hash
;
5540 hpp
= elf_sym_hashes (abfd
);
5541 hppend
= hpp
+ extsymcount
;
5543 for (; hpp
< hppend
; hpp
++)
5547 && h
->root
.type
== bfd_link_hash_defined
5548 && !bed
->is_function_type (h
->type
))
5556 qsort (sorted_sym_hash
, sym_count
, sizeof (*sorted_sym_hash
),
5559 while (weaks
!= NULL
)
5561 struct elf_link_hash_entry
*hlook
;
5564 size_t i
, j
, idx
= 0;
5567 weaks
= hlook
->u
.alias
;
5568 hlook
->u
.alias
= NULL
;
5570 if (hlook
->root
.type
!= bfd_link_hash_defined
5571 && hlook
->root
.type
!= bfd_link_hash_defweak
)
5574 slook
= hlook
->root
.u
.def
.section
;
5575 vlook
= hlook
->root
.u
.def
.value
;
5581 bfd_signed_vma vdiff
;
5583 h
= sorted_sym_hash
[idx
];
5584 vdiff
= vlook
- h
->root
.u
.def
.value
;
5591 int sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
5601 /* We didn't find a value/section match. */
5605 /* With multiple aliases, or when the weak symbol is already
5606 strongly defined, we have multiple matching symbols and
5607 the binary search above may land on any of them. Step
5608 one past the matching symbol(s). */
5611 h
= sorted_sym_hash
[idx
];
5612 if (h
->root
.u
.def
.section
!= slook
5613 || h
->root
.u
.def
.value
!= vlook
)
5617 /* Now look back over the aliases. Since we sorted by size
5618 as well as value and section, we'll choose the one with
5619 the largest size. */
5622 h
= sorted_sym_hash
[idx
];
5624 /* Stop if value or section doesn't match. */
5625 if (h
->root
.u
.def
.section
!= slook
5626 || h
->root
.u
.def
.value
!= vlook
)
5628 else if (h
!= hlook
)
5630 struct elf_link_hash_entry
*t
;
5633 hlook
->is_weakalias
= 1;
5635 if (t
->u
.alias
!= NULL
)
5636 while (t
->u
.alias
!= h
)
5640 /* If the weak definition is in the list of dynamic
5641 symbols, make sure the real definition is put
5643 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
5645 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
5648 free (sorted_sym_hash
);
5653 /* If the real definition is in the list of dynamic
5654 symbols, make sure the weak definition is put
5655 there as well. If we don't do this, then the
5656 dynamic loader might not merge the entries for the
5657 real definition and the weak definition. */
5658 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
5660 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
5661 goto err_free_sym_hash
;
5668 free (sorted_sym_hash
);
5671 if (bed
->check_directives
5672 && !(*bed
->check_directives
) (abfd
, info
))
5675 /* If this is a non-traditional link, try to optimize the handling
5676 of the .stab/.stabstr sections. */
5678 && ! info
->traditional_format
5679 && is_elf_hash_table (htab
)
5680 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
5684 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
5685 if (stabstr
!= NULL
)
5687 bfd_size_type string_offset
= 0;
5690 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
5691 if (CONST_STRNEQ (stab
->name
, ".stab")
5692 && (!stab
->name
[5] ||
5693 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
5694 && (stab
->flags
& SEC_MERGE
) == 0
5695 && !bfd_is_abs_section (stab
->output_section
))
5697 struct bfd_elf_section_data
*secdata
;
5699 secdata
= elf_section_data (stab
);
5700 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
5701 stabstr
, &secdata
->sec_info
,
5704 if (secdata
->sec_info
)
5705 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
5710 if (dynamic
&& add_needed
)
5712 /* Add this bfd to the loaded list. */
5713 struct elf_link_loaded_list
*n
;
5715 n
= (struct elf_link_loaded_list
*) bfd_alloc (abfd
, sizeof (*n
));
5719 n
->next
= htab
->dyn_loaded
;
5720 htab
->dyn_loaded
= n
;
5722 if (dynamic
&& !add_needed
5723 && (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) != 0)
5724 elf_dyn_lib_class (abfd
) |= DYN_NO_NEEDED
;
5731 free (nondeflt_vers
);
5739 /* Return the linker hash table entry of a symbol that might be
5740 satisfied by an archive symbol. Return -1 on error. */
5742 struct elf_link_hash_entry
*
5743 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
5744 struct bfd_link_info
*info
,
5747 struct elf_link_hash_entry
*h
;
5751 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
5755 /* If this is a default version (the name contains @@), look up the
5756 symbol again with only one `@' as well as without the version.
5757 The effect is that references to the symbol with and without the
5758 version will be matched by the default symbol in the archive. */
5760 p
= strchr (name
, ELF_VER_CHR
);
5761 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
5764 /* First check with only one `@'. */
5765 len
= strlen (name
);
5766 copy
= (char *) bfd_alloc (abfd
, len
);
5768 return (struct elf_link_hash_entry
*) -1;
5770 first
= p
- name
+ 1;
5771 memcpy (copy
, name
, first
);
5772 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
5774 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
5777 /* We also need to check references to the symbol without the
5779 copy
[first
- 1] = '\0';
5780 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
5781 FALSE
, FALSE
, TRUE
);
5784 bfd_release (abfd
, copy
);
5788 /* Add symbols from an ELF archive file to the linker hash table. We
5789 don't use _bfd_generic_link_add_archive_symbols because we need to
5790 handle versioned symbols.
5792 Fortunately, ELF archive handling is simpler than that done by
5793 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
5794 oddities. In ELF, if we find a symbol in the archive map, and the
5795 symbol is currently undefined, we know that we must pull in that
5798 Unfortunately, we do have to make multiple passes over the symbol
5799 table until nothing further is resolved. */
5802 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5805 unsigned char *included
= NULL
;
5809 const struct elf_backend_data
*bed
;
5810 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
5811 (bfd
*, struct bfd_link_info
*, const char *);
5813 if (! bfd_has_map (abfd
))
5815 /* An empty archive is a special case. */
5816 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
5818 bfd_set_error (bfd_error_no_armap
);
5822 /* Keep track of all symbols we know to be already defined, and all
5823 files we know to be already included. This is to speed up the
5824 second and subsequent passes. */
5825 c
= bfd_ardata (abfd
)->symdef_count
;
5828 amt
= c
* sizeof (*included
);
5829 included
= (unsigned char *) bfd_zmalloc (amt
);
5830 if (included
== NULL
)
5833 symdefs
= bfd_ardata (abfd
)->symdefs
;
5834 bed
= get_elf_backend_data (abfd
);
5835 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5848 symdefend
= symdef
+ c
;
5849 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5851 struct elf_link_hash_entry
*h
;
5853 struct bfd_link_hash_entry
*undefs_tail
;
5858 if (symdef
->file_offset
== last
)
5864 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5865 if (h
== (struct elf_link_hash_entry
*) -1)
5871 if (h
->root
.type
== bfd_link_hash_undefined
)
5873 /* If the archive element has already been loaded then one
5874 of the symbols defined by that element might have been
5875 made undefined due to being in a discarded section. */
5879 else if (h
->root
.type
== bfd_link_hash_common
)
5881 /* We currently have a common symbol. The archive map contains
5882 a reference to this symbol, so we may want to include it. We
5883 only want to include it however, if this archive element
5884 contains a definition of the symbol, not just another common
5887 Unfortunately some archivers (including GNU ar) will put
5888 declarations of common symbols into their archive maps, as
5889 well as real definitions, so we cannot just go by the archive
5890 map alone. Instead we must read in the element's symbol
5891 table and check that to see what kind of symbol definition
5893 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5898 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5899 /* Symbol must be defined. Don't check it again. */
5904 /* We need to include this archive member. */
5905 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5906 if (element
== NULL
)
5909 if (! bfd_check_format (element
, bfd_object
))
5912 undefs_tail
= info
->hash
->undefs_tail
;
5914 if (!(*info
->callbacks
5915 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5917 if (!bfd_link_add_symbols (element
, info
))
5920 /* If there are any new undefined symbols, we need to make
5921 another pass through the archive in order to see whether
5922 they can be defined. FIXME: This isn't perfect, because
5923 common symbols wind up on undefs_tail and because an
5924 undefined symbol which is defined later on in this pass
5925 does not require another pass. This isn't a bug, but it
5926 does make the code less efficient than it could be. */
5927 if (undefs_tail
!= info
->hash
->undefs_tail
)
5930 /* Look backward to mark all symbols from this object file
5931 which we have already seen in this pass. */
5935 included
[mark
] = TRUE
;
5940 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5942 /* We mark subsequent symbols from this object file as we go
5943 on through the loop. */
5944 last
= symdef
->file_offset
;
5957 /* Given an ELF BFD, add symbols to the global hash table as
5961 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5963 switch (bfd_get_format (abfd
))
5966 return elf_link_add_object_symbols (abfd
, info
);
5968 return elf_link_add_archive_symbols (abfd
, info
);
5970 bfd_set_error (bfd_error_wrong_format
);
5975 struct hash_codes_info
5977 unsigned long *hashcodes
;
5981 /* This function will be called though elf_link_hash_traverse to store
5982 all hash value of the exported symbols in an array. */
5985 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5987 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5992 /* Ignore indirect symbols. These are added by the versioning code. */
5993 if (h
->dynindx
== -1)
5996 name
= h
->root
.root
.string
;
5997 if (h
->versioned
>= versioned
)
5999 char *p
= strchr (name
, ELF_VER_CHR
);
6002 alc
= (char *) bfd_malloc (p
- name
+ 1);
6008 memcpy (alc
, name
, p
- name
);
6009 alc
[p
- name
] = '\0';
6014 /* Compute the hash value. */
6015 ha
= bfd_elf_hash (name
);
6017 /* Store the found hash value in the array given as the argument. */
6018 *(inf
->hashcodes
)++ = ha
;
6020 /* And store it in the struct so that we can put it in the hash table
6022 h
->u
.elf_hash_value
= ha
;
6028 struct collect_gnu_hash_codes
6031 const struct elf_backend_data
*bed
;
6032 unsigned long int nsyms
;
6033 unsigned long int maskbits
;
6034 unsigned long int *hashcodes
;
6035 unsigned long int *hashval
;
6036 unsigned long int *indx
;
6037 unsigned long int *counts
;
6041 long int min_dynindx
;
6042 unsigned long int bucketcount
;
6043 unsigned long int symindx
;
6044 long int local_indx
;
6045 long int shift1
, shift2
;
6046 unsigned long int mask
;
6050 /* This function will be called though elf_link_hash_traverse to store
6051 all hash value of the exported symbols in an array. */
6054 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
6056 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
6061 /* Ignore indirect symbols. These are added by the versioning code. */
6062 if (h
->dynindx
== -1)
6065 /* Ignore also local symbols and undefined symbols. */
6066 if (! (*s
->bed
->elf_hash_symbol
) (h
))
6069 name
= h
->root
.root
.string
;
6070 if (h
->versioned
>= versioned
)
6072 char *p
= strchr (name
, ELF_VER_CHR
);
6075 alc
= (char *) bfd_malloc (p
- name
+ 1);
6081 memcpy (alc
, name
, p
- name
);
6082 alc
[p
- name
] = '\0';
6087 /* Compute the hash value. */
6088 ha
= bfd_elf_gnu_hash (name
);
6090 /* Store the found hash value in the array for compute_bucket_count,
6091 and also for .dynsym reordering purposes. */
6092 s
->hashcodes
[s
->nsyms
] = ha
;
6093 s
->hashval
[h
->dynindx
] = ha
;
6095 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
6096 s
->min_dynindx
= h
->dynindx
;
6102 /* This function will be called though elf_link_hash_traverse to do
6103 final dynamic symbol renumbering in case of .gnu.hash.
6104 If using .MIPS.xhash, invoke record_xhash_symbol to add symbol index
6105 to the translation table. */
6108 elf_gnu_hash_process_symidx (struct elf_link_hash_entry
*h
, void *data
)
6110 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
6111 unsigned long int bucket
;
6112 unsigned long int val
;
6114 /* Ignore indirect symbols. */
6115 if (h
->dynindx
== -1)
6118 /* Ignore also local symbols and undefined symbols. */
6119 if (! (*s
->bed
->elf_hash_symbol
) (h
))
6121 if (h
->dynindx
>= s
->min_dynindx
)
6123 if (s
->bed
->record_xhash_symbol
!= NULL
)
6125 (*s
->bed
->record_xhash_symbol
) (h
, 0);
6129 h
->dynindx
= s
->local_indx
++;
6134 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
6135 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
6136 & ((s
->maskbits
>> s
->shift1
) - 1);
6137 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
6139 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
6140 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
6141 if (s
->counts
[bucket
] == 1)
6142 /* Last element terminates the chain. */
6144 bfd_put_32 (s
->output_bfd
, val
,
6145 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
6146 --s
->counts
[bucket
];
6147 if (s
->bed
->record_xhash_symbol
!= NULL
)
6149 bfd_vma xlat_loc
= s
->xlat
+ (s
->indx
[bucket
]++ - s
->symindx
) * 4;
6151 (*s
->bed
->record_xhash_symbol
) (h
, xlat_loc
);
6154 h
->dynindx
= s
->indx
[bucket
]++;
6158 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6161 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
6163 return !(h
->forced_local
6164 || h
->root
.type
== bfd_link_hash_undefined
6165 || h
->root
.type
== bfd_link_hash_undefweak
6166 || ((h
->root
.type
== bfd_link_hash_defined
6167 || h
->root
.type
== bfd_link_hash_defweak
)
6168 && h
->root
.u
.def
.section
->output_section
== NULL
));
6171 /* Array used to determine the number of hash table buckets to use
6172 based on the number of symbols there are. If there are fewer than
6173 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
6174 fewer than 37 we use 17 buckets, and so forth. We never use more
6175 than 32771 buckets. */
6177 static const size_t elf_buckets
[] =
6179 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
6183 /* Compute bucket count for hashing table. We do not use a static set
6184 of possible tables sizes anymore. Instead we determine for all
6185 possible reasonable sizes of the table the outcome (i.e., the
6186 number of collisions etc) and choose the best solution. The
6187 weighting functions are not too simple to allow the table to grow
6188 without bounds. Instead one of the weighting factors is the size.
6189 Therefore the result is always a good payoff between few collisions
6190 (= short chain lengths) and table size. */
6192 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
6193 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
6194 unsigned long int nsyms
,
6197 size_t best_size
= 0;
6198 unsigned long int i
;
6200 /* We have a problem here. The following code to optimize the table
6201 size requires an integer type with more the 32 bits. If
6202 BFD_HOST_U_64_BIT is set we know about such a type. */
6203 #ifdef BFD_HOST_U_64_BIT
6208 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
6209 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
6210 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
6211 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
6212 unsigned long int *counts
;
6214 unsigned int no_improvement_count
= 0;
6216 /* Possible optimization parameters: if we have NSYMS symbols we say
6217 that the hashing table must at least have NSYMS/4 and at most
6219 minsize
= nsyms
/ 4;
6222 best_size
= maxsize
= nsyms
* 2;
6227 if ((best_size
& 31) == 0)
6231 /* Create array where we count the collisions in. We must use bfd_malloc
6232 since the size could be large. */
6234 amt
*= sizeof (unsigned long int);
6235 counts
= (unsigned long int *) bfd_malloc (amt
);
6239 /* Compute the "optimal" size for the hash table. The criteria is a
6240 minimal chain length. The minor criteria is (of course) the size
6242 for (i
= minsize
; i
< maxsize
; ++i
)
6244 /* Walk through the array of hashcodes and count the collisions. */
6245 BFD_HOST_U_64_BIT max
;
6246 unsigned long int j
;
6247 unsigned long int fact
;
6249 if (gnu_hash
&& (i
& 31) == 0)
6252 memset (counts
, '\0', i
* sizeof (unsigned long int));
6254 /* Determine how often each hash bucket is used. */
6255 for (j
= 0; j
< nsyms
; ++j
)
6256 ++counts
[hashcodes
[j
] % i
];
6258 /* For the weight function we need some information about the
6259 pagesize on the target. This is information need not be 100%
6260 accurate. Since this information is not available (so far) we
6261 define it here to a reasonable default value. If it is crucial
6262 to have a better value some day simply define this value. */
6263 # ifndef BFD_TARGET_PAGESIZE
6264 # define BFD_TARGET_PAGESIZE (4096)
6267 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
6269 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
6272 /* Variant 1: optimize for short chains. We add the squares
6273 of all the chain lengths (which favors many small chain
6274 over a few long chains). */
6275 for (j
= 0; j
< i
; ++j
)
6276 max
+= counts
[j
] * counts
[j
];
6278 /* This adds penalties for the overall size of the table. */
6279 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
6282 /* Variant 2: Optimize a lot more for small table. Here we
6283 also add squares of the size but we also add penalties for
6284 empty slots (the +1 term). */
6285 for (j
= 0; j
< i
; ++j
)
6286 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
6288 /* The overall size of the table is considered, but not as
6289 strong as in variant 1, where it is squared. */
6290 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
6294 /* Compare with current best results. */
6295 if (max
< best_chlen
)
6299 no_improvement_count
= 0;
6301 /* PR 11843: Avoid futile long searches for the best bucket size
6302 when there are a large number of symbols. */
6303 else if (++no_improvement_count
== 100)
6310 #endif /* defined (BFD_HOST_U_64_BIT) */
6312 /* This is the fallback solution if no 64bit type is available or if we
6313 are not supposed to spend much time on optimizations. We select the
6314 bucket count using a fixed set of numbers. */
6315 for (i
= 0; elf_buckets
[i
] != 0; i
++)
6317 best_size
= elf_buckets
[i
];
6318 if (nsyms
< elf_buckets
[i
+ 1])
6321 if (gnu_hash
&& best_size
< 2)
6328 /* Size any SHT_GROUP section for ld -r. */
6331 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
6336 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
6337 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
6338 && (s
= ibfd
->sections
) != NULL
6339 && s
->sec_info_type
!= SEC_INFO_TYPE_JUST_SYMS
6340 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
6345 /* Set a default stack segment size. The value in INFO wins. If it
6346 is unset, LEGACY_SYMBOL's value is used, and if that symbol is
6347 undefined it is initialized. */
6350 bfd_elf_stack_segment_size (bfd
*output_bfd
,
6351 struct bfd_link_info
*info
,
6352 const char *legacy_symbol
,
6353 bfd_vma default_size
)
6355 struct elf_link_hash_entry
*h
= NULL
;
6357 /* Look for legacy symbol. */
6359 h
= elf_link_hash_lookup (elf_hash_table (info
), legacy_symbol
,
6360 FALSE
, FALSE
, FALSE
);
6361 if (h
&& (h
->root
.type
== bfd_link_hash_defined
6362 || h
->root
.type
== bfd_link_hash_defweak
)
6364 && (h
->type
== STT_NOTYPE
|| h
->type
== STT_OBJECT
))
6366 /* The symbol has no type if specified on the command line. */
6367 h
->type
= STT_OBJECT
;
6368 if (info
->stacksize
)
6369 /* xgettext:c-format */
6370 _bfd_error_handler (_("%pB: stack size specified and %s set"),
6371 output_bfd
, legacy_symbol
);
6372 else if (h
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
6373 /* xgettext:c-format */
6374 _bfd_error_handler (_("%pB: %s not absolute"),
6375 output_bfd
, legacy_symbol
);
6377 info
->stacksize
= h
->root
.u
.def
.value
;
6380 if (!info
->stacksize
)
6381 /* If the user didn't set a size, or explicitly inhibit the
6382 size, set it now. */
6383 info
->stacksize
= default_size
;
6385 /* Provide the legacy symbol, if it is referenced. */
6386 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
6387 || h
->root
.type
== bfd_link_hash_undefweak
))
6389 struct bfd_link_hash_entry
*bh
= NULL
;
6391 if (!(_bfd_generic_link_add_one_symbol
6392 (info
, output_bfd
, legacy_symbol
,
6393 BSF_GLOBAL
, bfd_abs_section_ptr
,
6394 info
->stacksize
>= 0 ? info
->stacksize
: 0,
6395 NULL
, FALSE
, get_elf_backend_data (output_bfd
)->collect
, &bh
)))
6398 h
= (struct elf_link_hash_entry
*) bh
;
6400 h
->type
= STT_OBJECT
;
6406 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
6408 struct elf_gc_sweep_symbol_info
6410 struct bfd_link_info
*info
;
6411 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
6416 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
6419 && (((h
->root
.type
== bfd_link_hash_defined
6420 || h
->root
.type
== bfd_link_hash_defweak
)
6421 && !((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
6422 && h
->root
.u
.def
.section
->gc_mark
))
6423 || h
->root
.type
== bfd_link_hash_undefined
6424 || h
->root
.type
== bfd_link_hash_undefweak
))
6426 struct elf_gc_sweep_symbol_info
*inf
;
6428 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
6429 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
6432 h
->ref_regular_nonweak
= 0;
6438 /* Set up the sizes and contents of the ELF dynamic sections. This is
6439 called by the ELF linker emulation before_allocation routine. We
6440 must set the sizes of the sections before the linker sets the
6441 addresses of the various sections. */
6444 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
6447 const char *filter_shlib
,
6449 const char *depaudit
,
6450 const char * const *auxiliary_filters
,
6451 struct bfd_link_info
*info
,
6452 asection
**sinterpptr
)
6455 const struct elf_backend_data
*bed
;
6459 if (!is_elf_hash_table (info
->hash
))
6462 dynobj
= elf_hash_table (info
)->dynobj
;
6464 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6466 struct bfd_elf_version_tree
*verdefs
;
6467 struct elf_info_failed asvinfo
;
6468 struct bfd_elf_version_tree
*t
;
6469 struct bfd_elf_version_expr
*d
;
6473 /* If we are supposed to export all symbols into the dynamic symbol
6474 table (this is not the normal case), then do so. */
6475 if (info
->export_dynamic
6476 || (bfd_link_executable (info
) && info
->dynamic
))
6478 struct elf_info_failed eif
;
6482 elf_link_hash_traverse (elf_hash_table (info
),
6483 _bfd_elf_export_symbol
,
6491 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6493 if (soname_indx
== (size_t) -1
6494 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
6498 soname_indx
= (size_t) -1;
6500 /* Make all global versions with definition. */
6501 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
6502 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
6503 if (!d
->symver
&& d
->literal
)
6505 const char *verstr
, *name
;
6506 size_t namelen
, verlen
, newlen
;
6507 char *newname
, *p
, leading_char
;
6508 struct elf_link_hash_entry
*newh
;
6510 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
6512 namelen
= strlen (name
) + (leading_char
!= '\0');
6514 verlen
= strlen (verstr
);
6515 newlen
= namelen
+ verlen
+ 3;
6517 newname
= (char *) bfd_malloc (newlen
);
6518 if (newname
== NULL
)
6520 newname
[0] = leading_char
;
6521 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
6523 /* Check the hidden versioned definition. */
6524 p
= newname
+ namelen
;
6526 memcpy (p
, verstr
, verlen
+ 1);
6527 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6528 newname
, FALSE
, FALSE
,
6531 || (newh
->root
.type
!= bfd_link_hash_defined
6532 && newh
->root
.type
!= bfd_link_hash_defweak
))
6534 /* Check the default versioned definition. */
6536 memcpy (p
, verstr
, verlen
+ 1);
6537 newh
= elf_link_hash_lookup (elf_hash_table (info
),
6538 newname
, FALSE
, FALSE
,
6543 /* Mark this version if there is a definition and it is
6544 not defined in a shared object. */
6546 && !newh
->def_dynamic
6547 && (newh
->root
.type
== bfd_link_hash_defined
6548 || newh
->root
.type
== bfd_link_hash_defweak
))
6552 /* Attach all the symbols to their version information. */
6553 asvinfo
.info
= info
;
6554 asvinfo
.failed
= FALSE
;
6556 elf_link_hash_traverse (elf_hash_table (info
),
6557 _bfd_elf_link_assign_sym_version
,
6562 if (!info
->allow_undefined_version
)
6564 /* Check if all global versions have a definition. */
6565 bfd_boolean all_defined
= TRUE
;
6566 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
6567 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
6568 if (d
->literal
&& !d
->symver
&& !d
->script
)
6571 (_("%s: undefined version: %s"),
6572 d
->pattern
, t
->name
);
6573 all_defined
= FALSE
;
6578 bfd_set_error (bfd_error_bad_value
);
6583 /* Set up the version definition section. */
6584 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
6585 BFD_ASSERT (s
!= NULL
);
6587 /* We may have created additional version definitions if we are
6588 just linking a regular application. */
6589 verdefs
= info
->version_info
;
6591 /* Skip anonymous version tag. */
6592 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
6593 verdefs
= verdefs
->next
;
6595 if (verdefs
== NULL
&& !info
->create_default_symver
)
6596 s
->flags
|= SEC_EXCLUDE
;
6602 Elf_Internal_Verdef def
;
6603 Elf_Internal_Verdaux defaux
;
6604 struct bfd_link_hash_entry
*bh
;
6605 struct elf_link_hash_entry
*h
;
6611 /* Make space for the base version. */
6612 size
+= sizeof (Elf_External_Verdef
);
6613 size
+= sizeof (Elf_External_Verdaux
);
6616 /* Make space for the default version. */
6617 if (info
->create_default_symver
)
6619 size
+= sizeof (Elf_External_Verdef
);
6623 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6625 struct bfd_elf_version_deps
*n
;
6627 /* Don't emit base version twice. */
6631 size
+= sizeof (Elf_External_Verdef
);
6632 size
+= sizeof (Elf_External_Verdaux
);
6635 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6636 size
+= sizeof (Elf_External_Verdaux
);
6640 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6641 if (s
->contents
== NULL
&& s
->size
!= 0)
6644 /* Fill in the version definition section. */
6648 def
.vd_version
= VER_DEF_CURRENT
;
6649 def
.vd_flags
= VER_FLG_BASE
;
6652 if (info
->create_default_symver
)
6654 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6655 def
.vd_next
= sizeof (Elf_External_Verdef
);
6659 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6660 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6661 + sizeof (Elf_External_Verdaux
));
6664 if (soname_indx
!= (size_t) -1)
6666 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6668 def
.vd_hash
= bfd_elf_hash (soname
);
6669 defaux
.vda_name
= soname_indx
;
6676 name
= lbasename (bfd_get_filename (output_bfd
));
6677 def
.vd_hash
= bfd_elf_hash (name
);
6678 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6680 if (indx
== (size_t) -1)
6682 defaux
.vda_name
= indx
;
6684 defaux
.vda_next
= 0;
6686 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6687 (Elf_External_Verdef
*) p
);
6688 p
+= sizeof (Elf_External_Verdef
);
6689 if (info
->create_default_symver
)
6691 /* Add a symbol representing this version. */
6693 if (! (_bfd_generic_link_add_one_symbol
6694 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6696 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6698 h
= (struct elf_link_hash_entry
*) bh
;
6701 h
->type
= STT_OBJECT
;
6702 h
->verinfo
.vertree
= NULL
;
6704 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6707 /* Create a duplicate of the base version with the same
6708 aux block, but different flags. */
6711 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6713 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6714 + sizeof (Elf_External_Verdaux
));
6717 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6718 (Elf_External_Verdef
*) p
);
6719 p
+= sizeof (Elf_External_Verdef
);
6721 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6722 (Elf_External_Verdaux
*) p
);
6723 p
+= sizeof (Elf_External_Verdaux
);
6725 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6728 struct bfd_elf_version_deps
*n
;
6730 /* Don't emit the base version twice. */
6735 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6738 /* Add a symbol representing this version. */
6740 if (! (_bfd_generic_link_add_one_symbol
6741 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6743 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6745 h
= (struct elf_link_hash_entry
*) bh
;
6748 h
->type
= STT_OBJECT
;
6749 h
->verinfo
.vertree
= t
;
6751 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6754 def
.vd_version
= VER_DEF_CURRENT
;
6756 if (t
->globals
.list
== NULL
6757 && t
->locals
.list
== NULL
6759 def
.vd_flags
|= VER_FLG_WEAK
;
6760 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6761 def
.vd_cnt
= cdeps
+ 1;
6762 def
.vd_hash
= bfd_elf_hash (t
->name
);
6763 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6766 /* If a basever node is next, it *must* be the last node in
6767 the chain, otherwise Verdef construction breaks. */
6768 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6769 BFD_ASSERT (t
->next
->next
== NULL
);
6771 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6772 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6773 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6775 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6776 (Elf_External_Verdef
*) p
);
6777 p
+= sizeof (Elf_External_Verdef
);
6779 defaux
.vda_name
= h
->dynstr_index
;
6780 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6782 defaux
.vda_next
= 0;
6783 if (t
->deps
!= NULL
)
6784 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6785 t
->name_indx
= defaux
.vda_name
;
6787 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6788 (Elf_External_Verdaux
*) p
);
6789 p
+= sizeof (Elf_External_Verdaux
);
6791 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6793 if (n
->version_needed
== NULL
)
6795 /* This can happen if there was an error in the
6797 defaux
.vda_name
= 0;
6801 defaux
.vda_name
= n
->version_needed
->name_indx
;
6802 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6805 if (n
->next
== NULL
)
6806 defaux
.vda_next
= 0;
6808 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6810 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6811 (Elf_External_Verdaux
*) p
);
6812 p
+= sizeof (Elf_External_Verdaux
);
6816 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6820 bed
= get_elf_backend_data (output_bfd
);
6822 if (info
->gc_sections
&& bed
->can_gc_sections
)
6824 struct elf_gc_sweep_symbol_info sweep_info
;
6826 /* Remove the symbols that were in the swept sections from the
6827 dynamic symbol table. */
6828 sweep_info
.info
= info
;
6829 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
6830 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
6834 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
6837 struct elf_find_verdep_info sinfo
;
6839 /* Work out the size of the version reference section. */
6841 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6842 BFD_ASSERT (s
!= NULL
);
6845 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6846 if (sinfo
.vers
== 0)
6848 sinfo
.failed
= FALSE
;
6850 elf_link_hash_traverse (elf_hash_table (info
),
6851 _bfd_elf_link_find_version_dependencies
,
6856 if (elf_tdata (output_bfd
)->verref
== NULL
)
6857 s
->flags
|= SEC_EXCLUDE
;
6860 Elf_Internal_Verneed
*vn
;
6865 /* Build the version dependency section. */
6868 for (vn
= elf_tdata (output_bfd
)->verref
;
6870 vn
= vn
->vn_nextref
)
6872 Elf_Internal_Vernaux
*a
;
6874 size
+= sizeof (Elf_External_Verneed
);
6876 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6877 size
+= sizeof (Elf_External_Vernaux
);
6881 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6882 if (s
->contents
== NULL
)
6886 for (vn
= elf_tdata (output_bfd
)->verref
;
6888 vn
= vn
->vn_nextref
)
6891 Elf_Internal_Vernaux
*a
;
6895 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6898 vn
->vn_version
= VER_NEED_CURRENT
;
6900 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6901 elf_dt_name (vn
->vn_bfd
) != NULL
6902 ? elf_dt_name (vn
->vn_bfd
)
6903 : lbasename (bfd_get_filename
6906 if (indx
== (size_t) -1)
6909 vn
->vn_aux
= sizeof (Elf_External_Verneed
);
6910 if (vn
->vn_nextref
== NULL
)
6913 vn
->vn_next
= (sizeof (Elf_External_Verneed
)
6914 + caux
* sizeof (Elf_External_Vernaux
));
6916 _bfd_elf_swap_verneed_out (output_bfd
, vn
,
6917 (Elf_External_Verneed
*) p
);
6918 p
+= sizeof (Elf_External_Verneed
);
6920 for (a
= vn
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6922 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6923 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6924 a
->vna_nodename
, FALSE
);
6925 if (indx
== (size_t) -1)
6928 if (a
->vna_nextptr
== NULL
)
6931 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6933 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6934 (Elf_External_Vernaux
*) p
);
6935 p
+= sizeof (Elf_External_Vernaux
);
6939 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6943 /* Any syms created from now on start with -1 in
6944 got.refcount/offset and plt.refcount/offset. */
6945 elf_hash_table (info
)->init_got_refcount
6946 = elf_hash_table (info
)->init_got_offset
;
6947 elf_hash_table (info
)->init_plt_refcount
6948 = elf_hash_table (info
)->init_plt_offset
;
6950 if (bfd_link_relocatable (info
)
6951 && !_bfd_elf_size_group_sections (info
))
6954 /* The backend may have to create some sections regardless of whether
6955 we're dynamic or not. */
6956 if (bed
->elf_backend_always_size_sections
6957 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
6960 /* Determine any GNU_STACK segment requirements, after the backend
6961 has had a chance to set a default segment size. */
6962 if (info
->execstack
)
6963 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| PF_X
;
6964 else if (info
->noexecstack
)
6965 elf_stack_flags (output_bfd
) = PF_R
| PF_W
;
6969 asection
*notesec
= NULL
;
6972 for (inputobj
= info
->input_bfds
;
6974 inputobj
= inputobj
->link
.next
)
6979 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
6981 s
= inputobj
->sections
;
6982 if (s
== NULL
|| s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
6985 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
6988 if (s
->flags
& SEC_CODE
)
6992 else if (bed
->default_execstack
)
6995 if (notesec
|| info
->stacksize
> 0)
6996 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| exec
;
6997 if (notesec
&& exec
&& bfd_link_relocatable (info
)
6998 && notesec
->output_section
!= bfd_abs_section_ptr
)
6999 notesec
->output_section
->flags
|= SEC_CODE
;
7002 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
7004 struct elf_info_failed eif
;
7005 struct elf_link_hash_entry
*h
;
7009 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
7010 BFD_ASSERT (*sinterpptr
!= NULL
|| !bfd_link_executable (info
) || info
->nointerp
);
7014 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
7016 info
->flags
|= DF_SYMBOLIC
;
7024 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
7026 if (indx
== (size_t) -1)
7029 tag
= info
->new_dtags
? DT_RUNPATH
: DT_RPATH
;
7030 if (!_bfd_elf_add_dynamic_entry (info
, tag
, indx
))
7034 if (filter_shlib
!= NULL
)
7038 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
7039 filter_shlib
, TRUE
);
7040 if (indx
== (size_t) -1
7041 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
7045 if (auxiliary_filters
!= NULL
)
7047 const char * const *p
;
7049 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
7053 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
7055 if (indx
== (size_t) -1
7056 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
7065 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
7067 if (indx
== (size_t) -1
7068 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
7072 if (depaudit
!= NULL
)
7076 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
7078 if (indx
== (size_t) -1
7079 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
7086 /* Find all symbols which were defined in a dynamic object and make
7087 the backend pick a reasonable value for them. */
7088 elf_link_hash_traverse (elf_hash_table (info
),
7089 _bfd_elf_adjust_dynamic_symbol
,
7094 /* Add some entries to the .dynamic section. We fill in some of the
7095 values later, in bfd_elf_final_link, but we must add the entries
7096 now so that we know the final size of the .dynamic section. */
7098 /* If there are initialization and/or finalization functions to
7099 call then add the corresponding DT_INIT/DT_FINI entries. */
7100 h
= (info
->init_function
7101 ? elf_link_hash_lookup (elf_hash_table (info
),
7102 info
->init_function
, FALSE
,
7109 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
7112 h
= (info
->fini_function
7113 ? elf_link_hash_lookup (elf_hash_table (info
),
7114 info
->fini_function
, FALSE
,
7121 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
7125 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
7126 if (s
!= NULL
&& s
->linker_has_input
)
7128 /* DT_PREINIT_ARRAY is not allowed in shared library. */
7129 if (! bfd_link_executable (info
))
7134 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
7135 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
7136 && (o
= sub
->sections
) != NULL
7137 && o
->sec_info_type
!= SEC_INFO_TYPE_JUST_SYMS
)
7138 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
7139 if (elf_section_data (o
)->this_hdr
.sh_type
7140 == SHT_PREINIT_ARRAY
)
7143 (_("%pB: .preinit_array section is not allowed in DSO"),
7148 bfd_set_error (bfd_error_nonrepresentable_section
);
7152 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
7153 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
7156 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
7157 if (s
!= NULL
&& s
->linker_has_input
)
7159 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
7160 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
7163 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
7164 if (s
!= NULL
&& s
->linker_has_input
)
7166 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
7167 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
7171 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
7172 /* If .dynstr is excluded from the link, we don't want any of
7173 these tags. Strictly, we should be checking each section
7174 individually; This quick check covers for the case where
7175 someone does a /DISCARD/ : { *(*) }. */
7176 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
7178 bfd_size_type strsize
;
7180 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
7181 if ((info
->emit_hash
7182 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
7183 || (info
->emit_gnu_hash
7184 && (bed
->record_xhash_symbol
== NULL
7185 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0)))
7186 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
7187 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
7188 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
7189 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
7191 || (info
->gnu_flags_1
7192 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_FLAGS_1
,
7193 info
->gnu_flags_1
)))
7198 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
7201 /* The backend must work out the sizes of all the other dynamic
7204 && bed
->elf_backend_size_dynamic_sections
!= NULL
7205 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
7208 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
7210 if (elf_tdata (output_bfd
)->cverdefs
)
7212 unsigned int crefs
= elf_tdata (output_bfd
)->cverdefs
;
7214 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
7215 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, crefs
))
7219 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
7221 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
7224 else if (info
->flags
& DF_BIND_NOW
)
7226 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
7232 if (bfd_link_executable (info
))
7233 info
->flags_1
&= ~ (DF_1_INITFIRST
7236 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
7240 if (elf_tdata (output_bfd
)->cverrefs
)
7242 unsigned int crefs
= elf_tdata (output_bfd
)->cverrefs
;
7244 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
7245 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
7249 if ((elf_tdata (output_bfd
)->cverrefs
== 0
7250 && elf_tdata (output_bfd
)->cverdefs
== 0)
7251 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
, NULL
) <= 1)
7255 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
7256 s
->flags
|= SEC_EXCLUDE
;
7262 /* Find the first non-excluded output section. We'll use its
7263 section symbol for some emitted relocs. */
7265 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
7268 asection
*found
= NULL
;
7270 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7271 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7272 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7275 if ((s
->flags
& SEC_THREAD_LOCAL
) == 0)
7278 elf_hash_table (info
)->text_index_section
= found
;
7281 /* Find two non-excluded output sections, one for code, one for data.
7282 We'll use their section symbols for some emitted relocs. */
7284 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
7287 asection
*found
= NULL
;
7289 /* Data first, since setting text_index_section changes
7290 _bfd_elf_omit_section_dynsym_default. */
7291 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7292 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7293 && !(s
->flags
& SEC_READONLY
)
7294 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7297 if ((s
->flags
& SEC_THREAD_LOCAL
) == 0)
7300 elf_hash_table (info
)->data_index_section
= found
;
7302 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
7303 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
7304 && (s
->flags
& SEC_READONLY
)
7305 && !_bfd_elf_omit_section_dynsym_default (output_bfd
, info
, s
))
7310 elf_hash_table (info
)->text_index_section
= found
;
7313 #define GNU_HASH_SECTION_NAME(bed) \
7314 (bed)->record_xhash_symbol != NULL ? ".MIPS.xhash" : ".gnu.hash"
7317 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
7319 const struct elf_backend_data
*bed
;
7320 unsigned long section_sym_count
;
7321 bfd_size_type dynsymcount
= 0;
7323 if (!is_elf_hash_table (info
->hash
))
7326 bed
= get_elf_backend_data (output_bfd
);
7327 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
7329 /* Assign dynsym indices. In a shared library we generate a section
7330 symbol for each output section, which come first. Next come all
7331 of the back-end allocated local dynamic syms, followed by the rest
7332 of the global symbols.
7334 This is usually not needed for static binaries, however backends
7335 can request to always do it, e.g. the MIPS backend uses dynamic
7336 symbol counts to lay out GOT, which will be produced in the
7337 presence of GOT relocations even in static binaries (holding fixed
7338 data in that case, to satisfy those relocations). */
7340 if (elf_hash_table (info
)->dynamic_sections_created
7341 || bed
->always_renumber_dynsyms
)
7342 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
7343 §ion_sym_count
);
7345 if (elf_hash_table (info
)->dynamic_sections_created
)
7349 unsigned int dtagcount
;
7351 dynobj
= elf_hash_table (info
)->dynobj
;
7353 /* Work out the size of the symbol version section. */
7354 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
7355 BFD_ASSERT (s
!= NULL
);
7356 if ((s
->flags
& SEC_EXCLUDE
) == 0)
7358 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
7359 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7360 if (s
->contents
== NULL
)
7363 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
7367 /* Set the size of the .dynsym and .hash sections. We counted
7368 the number of dynamic symbols in elf_link_add_object_symbols.
7369 We will build the contents of .dynsym and .hash when we build
7370 the final symbol table, because until then we do not know the
7371 correct value to give the symbols. We built the .dynstr
7372 section as we went along in elf_link_add_object_symbols. */
7373 s
= elf_hash_table (info
)->dynsym
;
7374 BFD_ASSERT (s
!= NULL
);
7375 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
7377 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
7378 if (s
->contents
== NULL
)
7381 /* The first entry in .dynsym is a dummy symbol. Clear all the
7382 section syms, in case we don't output them all. */
7383 ++section_sym_count
;
7384 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
7386 elf_hash_table (info
)->bucketcount
= 0;
7388 /* Compute the size of the hashing table. As a side effect this
7389 computes the hash values for all the names we export. */
7390 if (info
->emit_hash
)
7392 unsigned long int *hashcodes
;
7393 struct hash_codes_info hashinf
;
7395 unsigned long int nsyms
;
7397 size_t hash_entry_size
;
7399 /* Compute the hash values for all exported symbols. At the same
7400 time store the values in an array so that we could use them for
7402 amt
= dynsymcount
* sizeof (unsigned long int);
7403 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
7404 if (hashcodes
== NULL
)
7406 hashinf
.hashcodes
= hashcodes
;
7407 hashinf
.error
= FALSE
;
7409 /* Put all hash values in HASHCODES. */
7410 elf_link_hash_traverse (elf_hash_table (info
),
7411 elf_collect_hash_codes
, &hashinf
);
7418 nsyms
= hashinf
.hashcodes
- hashcodes
;
7420 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
7423 if (bucketcount
== 0 && nsyms
> 0)
7426 elf_hash_table (info
)->bucketcount
= bucketcount
;
7428 s
= bfd_get_linker_section (dynobj
, ".hash");
7429 BFD_ASSERT (s
!= NULL
);
7430 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
7431 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
7432 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7433 if (s
->contents
== NULL
)
7436 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
7437 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
7438 s
->contents
+ hash_entry_size
);
7441 if (info
->emit_gnu_hash
)
7444 unsigned char *contents
;
7445 struct collect_gnu_hash_codes cinfo
;
7449 memset (&cinfo
, 0, sizeof (cinfo
));
7451 /* Compute the hash values for all exported symbols. At the same
7452 time store the values in an array so that we could use them for
7454 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
7455 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
7456 if (cinfo
.hashcodes
== NULL
)
7459 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
7460 cinfo
.min_dynindx
= -1;
7461 cinfo
.output_bfd
= output_bfd
;
7464 /* Put all hash values in HASHCODES. */
7465 elf_link_hash_traverse (elf_hash_table (info
),
7466 elf_collect_gnu_hash_codes
, &cinfo
);
7469 free (cinfo
.hashcodes
);
7474 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
7476 if (bucketcount
== 0)
7478 free (cinfo
.hashcodes
);
7482 s
= bfd_get_linker_section (dynobj
, GNU_HASH_SECTION_NAME (bed
));
7483 BFD_ASSERT (s
!= NULL
);
7485 if (cinfo
.nsyms
== 0)
7487 /* Empty .gnu.hash or .MIPS.xhash section is special. */
7488 BFD_ASSERT (cinfo
.min_dynindx
== -1);
7489 free (cinfo
.hashcodes
);
7490 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
7491 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7492 if (contents
== NULL
)
7494 s
->contents
= contents
;
7495 /* 1 empty bucket. */
7496 bfd_put_32 (output_bfd
, 1, contents
);
7497 /* SYMIDX above the special symbol 0. */
7498 bfd_put_32 (output_bfd
, 1, contents
+ 4);
7499 /* Just one word for bitmask. */
7500 bfd_put_32 (output_bfd
, 1, contents
+ 8);
7501 /* Only hash fn bloom filter. */
7502 bfd_put_32 (output_bfd
, 0, contents
+ 12);
7503 /* No hashes are valid - empty bitmask. */
7504 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
7505 /* No hashes in the only bucket. */
7506 bfd_put_32 (output_bfd
, 0,
7507 contents
+ 16 + bed
->s
->arch_size
/ 8);
7511 unsigned long int maskwords
, maskbitslog2
, x
;
7512 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
7516 while ((x
>>= 1) != 0)
7518 if (maskbitslog2
< 3)
7520 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
7521 maskbitslog2
= maskbitslog2
+ 3;
7523 maskbitslog2
= maskbitslog2
+ 2;
7524 if (bed
->s
->arch_size
== 64)
7526 if (maskbitslog2
== 5)
7532 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
7533 cinfo
.shift2
= maskbitslog2
;
7534 cinfo
.maskbits
= 1 << maskbitslog2
;
7535 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
7536 amt
= bucketcount
* sizeof (unsigned long int) * 2;
7537 amt
+= maskwords
* sizeof (bfd_vma
);
7538 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
7539 if (cinfo
.bitmask
== NULL
)
7541 free (cinfo
.hashcodes
);
7545 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
7546 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
7547 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
7548 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
7550 /* Determine how often each hash bucket is used. */
7551 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
7552 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
7553 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
7555 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
7556 if (cinfo
.counts
[i
] != 0)
7558 cinfo
.indx
[i
] = cnt
;
7559 cnt
+= cinfo
.counts
[i
];
7561 BFD_ASSERT (cnt
== dynsymcount
);
7562 cinfo
.bucketcount
= bucketcount
;
7563 cinfo
.local_indx
= cinfo
.min_dynindx
;
7565 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
7566 s
->size
+= cinfo
.maskbits
/ 8;
7567 if (bed
->record_xhash_symbol
!= NULL
)
7568 s
->size
+= cinfo
.nsyms
* 4;
7569 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
7570 if (contents
== NULL
)
7572 free (cinfo
.bitmask
);
7573 free (cinfo
.hashcodes
);
7577 s
->contents
= contents
;
7578 bfd_put_32 (output_bfd
, bucketcount
, contents
);
7579 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
7580 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
7581 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
7582 contents
+= 16 + cinfo
.maskbits
/ 8;
7584 for (i
= 0; i
< bucketcount
; ++i
)
7586 if (cinfo
.counts
[i
] == 0)
7587 bfd_put_32 (output_bfd
, 0, contents
);
7589 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
7593 cinfo
.contents
= contents
;
7595 cinfo
.xlat
= contents
+ cinfo
.nsyms
* 4 - s
->contents
;
7596 /* Renumber dynamic symbols, if populating .gnu.hash section.
7597 If using .MIPS.xhash, populate the translation table. */
7598 elf_link_hash_traverse (elf_hash_table (info
),
7599 elf_gnu_hash_process_symidx
, &cinfo
);
7601 contents
= s
->contents
+ 16;
7602 for (i
= 0; i
< maskwords
; ++i
)
7604 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
7606 contents
+= bed
->s
->arch_size
/ 8;
7609 free (cinfo
.bitmask
);
7610 free (cinfo
.hashcodes
);
7614 s
= bfd_get_linker_section (dynobj
, ".dynstr");
7615 BFD_ASSERT (s
!= NULL
);
7617 elf_finalize_dynstr (output_bfd
, info
);
7619 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
7621 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
7622 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
7629 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
7632 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
7635 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
7636 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
7639 /* Finish SHF_MERGE section merging. */
7642 _bfd_elf_merge_sections (bfd
*obfd
, struct bfd_link_info
*info
)
7647 if (!is_elf_hash_table (info
->hash
))
7650 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
7651 if ((ibfd
->flags
& DYNAMIC
) == 0
7652 && bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
7653 && (elf_elfheader (ibfd
)->e_ident
[EI_CLASS
]
7654 == get_elf_backend_data (obfd
)->s
->elfclass
))
7655 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
7656 if ((sec
->flags
& SEC_MERGE
) != 0
7657 && !bfd_is_abs_section (sec
->output_section
))
7659 struct bfd_elf_section_data
*secdata
;
7661 secdata
= elf_section_data (sec
);
7662 if (! _bfd_add_merge_section (obfd
,
7663 &elf_hash_table (info
)->merge_info
,
7664 sec
, &secdata
->sec_info
))
7666 else if (secdata
->sec_info
)
7667 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
7670 if (elf_hash_table (info
)->merge_info
!= NULL
)
7671 _bfd_merge_sections (obfd
, info
, elf_hash_table (info
)->merge_info
,
7672 merge_sections_remove_hook
);
7676 /* Create an entry in an ELF linker hash table. */
7678 struct bfd_hash_entry
*
7679 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
7680 struct bfd_hash_table
*table
,
7683 /* Allocate the structure if it has not already been allocated by a
7687 entry
= (struct bfd_hash_entry
*)
7688 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
7693 /* Call the allocation method of the superclass. */
7694 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
7697 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
7698 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
7700 /* Set local fields. */
7703 ret
->got
= htab
->init_got_refcount
;
7704 ret
->plt
= htab
->init_plt_refcount
;
7705 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
7706 - offsetof (struct elf_link_hash_entry
, size
)));
7707 /* Assume that we have been called by a non-ELF symbol reader.
7708 This flag is then reset by the code which reads an ELF input
7709 file. This ensures that a symbol created by a non-ELF symbol
7710 reader will have the flag set correctly. */
7717 /* Copy data from an indirect symbol to its direct symbol, hiding the
7718 old indirect symbol. Also used for copying flags to a weakdef. */
7721 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
7722 struct elf_link_hash_entry
*dir
,
7723 struct elf_link_hash_entry
*ind
)
7725 struct elf_link_hash_table
*htab
;
7727 if (ind
->dyn_relocs
!= NULL
)
7729 if (dir
->dyn_relocs
!= NULL
)
7731 struct elf_dyn_relocs
**pp
;
7732 struct elf_dyn_relocs
*p
;
7734 /* Add reloc counts against the indirect sym to the direct sym
7735 list. Merge any entries against the same section. */
7736 for (pp
= &ind
->dyn_relocs
; (p
= *pp
) != NULL
; )
7738 struct elf_dyn_relocs
*q
;
7740 for (q
= dir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
7741 if (q
->sec
== p
->sec
)
7743 q
->pc_count
+= p
->pc_count
;
7744 q
->count
+= p
->count
;
7751 *pp
= dir
->dyn_relocs
;
7754 dir
->dyn_relocs
= ind
->dyn_relocs
;
7755 ind
->dyn_relocs
= NULL
;
7758 /* Copy down any references that we may have already seen to the
7759 symbol which just became indirect. */
7761 if (dir
->versioned
!= versioned_hidden
)
7762 dir
->ref_dynamic
|= ind
->ref_dynamic
;
7763 dir
->ref_regular
|= ind
->ref_regular
;
7764 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
7765 dir
->non_got_ref
|= ind
->non_got_ref
;
7766 dir
->needs_plt
|= ind
->needs_plt
;
7767 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
7769 if (ind
->root
.type
!= bfd_link_hash_indirect
)
7772 /* Copy over the global and procedure linkage table refcount entries.
7773 These may have been already set up by a check_relocs routine. */
7774 htab
= elf_hash_table (info
);
7775 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
7777 if (dir
->got
.refcount
< 0)
7778 dir
->got
.refcount
= 0;
7779 dir
->got
.refcount
+= ind
->got
.refcount
;
7780 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
7783 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
7785 if (dir
->plt
.refcount
< 0)
7786 dir
->plt
.refcount
= 0;
7787 dir
->plt
.refcount
+= ind
->plt
.refcount
;
7788 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
7791 if (ind
->dynindx
!= -1)
7793 if (dir
->dynindx
!= -1)
7794 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
7795 dir
->dynindx
= ind
->dynindx
;
7796 dir
->dynstr_index
= ind
->dynstr_index
;
7798 ind
->dynstr_index
= 0;
7803 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
7804 struct elf_link_hash_entry
*h
,
7805 bfd_boolean force_local
)
7807 /* STT_GNU_IFUNC symbol must go through PLT. */
7808 if (h
->type
!= STT_GNU_IFUNC
)
7810 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
7815 h
->forced_local
= 1;
7816 if (h
->dynindx
!= -1)
7818 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
7821 h
->dynstr_index
= 0;
7826 /* Hide a symbol. */
7829 _bfd_elf_link_hide_symbol (bfd
*output_bfd
,
7830 struct bfd_link_info
*info
,
7831 struct bfd_link_hash_entry
*h
)
7833 if (is_elf_hash_table (info
->hash
))
7835 const struct elf_backend_data
*bed
7836 = get_elf_backend_data (output_bfd
);
7837 struct elf_link_hash_entry
*eh
7838 = (struct elf_link_hash_entry
*) h
;
7839 bed
->elf_backend_hide_symbol (info
, eh
, TRUE
);
7840 eh
->def_dynamic
= 0;
7841 eh
->ref_dynamic
= 0;
7842 eh
->dynamic_def
= 0;
7846 /* Initialize an ELF linker hash table. *TABLE has been zeroed by our
7850 _bfd_elf_link_hash_table_init
7851 (struct elf_link_hash_table
*table
,
7853 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
7854 struct bfd_hash_table
*,
7856 unsigned int entsize
,
7857 enum elf_target_id target_id
)
7860 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
7862 table
->init_got_refcount
.refcount
= can_refcount
- 1;
7863 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
7864 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
7865 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
7866 /* The first dynamic symbol is a dummy. */
7867 table
->dynsymcount
= 1;
7869 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
7871 table
->root
.type
= bfd_link_elf_hash_table
;
7872 table
->hash_table_id
= target_id
;
7873 table
->target_os
= get_elf_backend_data (abfd
)->target_os
;
7878 /* Create an ELF linker hash table. */
7880 struct bfd_link_hash_table
*
7881 _bfd_elf_link_hash_table_create (bfd
*abfd
)
7883 struct elf_link_hash_table
*ret
;
7884 size_t amt
= sizeof (struct elf_link_hash_table
);
7886 ret
= (struct elf_link_hash_table
*) bfd_zmalloc (amt
);
7890 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
7891 sizeof (struct elf_link_hash_entry
),
7897 ret
->root
.hash_table_free
= _bfd_elf_link_hash_table_free
;
7902 /* Destroy an ELF linker hash table. */
7905 _bfd_elf_link_hash_table_free (bfd
*obfd
)
7907 struct elf_link_hash_table
*htab
;
7909 htab
= (struct elf_link_hash_table
*) obfd
->link
.hash
;
7910 if (htab
->dynstr
!= NULL
)
7911 _bfd_elf_strtab_free (htab
->dynstr
);
7912 _bfd_merge_sections_free (htab
->merge_info
);
7913 _bfd_generic_link_hash_table_free (obfd
);
7916 /* This is a hook for the ELF emulation code in the generic linker to
7917 tell the backend linker what file name to use for the DT_NEEDED
7918 entry for a dynamic object. */
7921 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
7923 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7924 && bfd_get_format (abfd
) == bfd_object
)
7925 elf_dt_name (abfd
) = name
;
7929 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
7932 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7933 && bfd_get_format (abfd
) == bfd_object
)
7934 lib_class
= elf_dyn_lib_class (abfd
);
7941 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
7943 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7944 && bfd_get_format (abfd
) == bfd_object
)
7945 elf_dyn_lib_class (abfd
) = lib_class
;
7948 /* Get the list of DT_NEEDED entries for a link. This is a hook for
7949 the linker ELF emulation code. */
7951 struct bfd_link_needed_list
*
7952 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7953 struct bfd_link_info
*info
)
7955 if (! is_elf_hash_table (info
->hash
))
7957 return elf_hash_table (info
)->needed
;
7960 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
7961 hook for the linker ELF emulation code. */
7963 struct bfd_link_needed_list
*
7964 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
7965 struct bfd_link_info
*info
)
7967 if (! is_elf_hash_table (info
->hash
))
7969 return elf_hash_table (info
)->runpath
;
7972 /* Get the name actually used for a dynamic object for a link. This
7973 is the SONAME entry if there is one. Otherwise, it is the string
7974 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
7977 bfd_elf_get_dt_soname (bfd
*abfd
)
7979 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
7980 && bfd_get_format (abfd
) == bfd_object
)
7981 return elf_dt_name (abfd
);
7985 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
7986 the ELF linker emulation code. */
7989 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
7990 struct bfd_link_needed_list
**pneeded
)
7993 bfd_byte
*dynbuf
= NULL
;
7994 unsigned int elfsec
;
7995 unsigned long shlink
;
7996 bfd_byte
*extdyn
, *extdynend
;
7998 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
8002 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
8003 || bfd_get_format (abfd
) != bfd_object
)
8006 s
= bfd_get_section_by_name (abfd
, ".dynamic");
8007 if (s
== NULL
|| s
->size
== 0)
8010 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
8013 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
8014 if (elfsec
== SHN_BAD
)
8017 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
8019 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
8020 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
8023 extdynend
= extdyn
+ s
->size
;
8024 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
8026 Elf_Internal_Dyn dyn
;
8028 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
8030 if (dyn
.d_tag
== DT_NULL
)
8033 if (dyn
.d_tag
== DT_NEEDED
)
8036 struct bfd_link_needed_list
*l
;
8037 unsigned int tagv
= dyn
.d_un
.d_val
;
8040 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
8045 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
8065 struct elf_symbuf_symbol
8067 unsigned long st_name
; /* Symbol name, index in string tbl */
8068 unsigned char st_info
; /* Type and binding attributes */
8069 unsigned char st_other
; /* Visibilty, and target specific */
8072 struct elf_symbuf_head
8074 struct elf_symbuf_symbol
*ssym
;
8076 unsigned int st_shndx
;
8083 Elf_Internal_Sym
*isym
;
8084 struct elf_symbuf_symbol
*ssym
;
8090 /* Sort references to symbols by ascending section number. */
8093 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8095 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
8096 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
8098 if (s1
->st_shndx
!= s2
->st_shndx
)
8099 return s1
->st_shndx
> s2
->st_shndx
? 1 : -1;
8100 /* Final sort by the address of the sym in the symbuf ensures
8103 return s1
> s2
? 1 : -1;
8108 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8110 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8111 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8112 int ret
= strcmp (s1
->name
, s2
->name
);
8115 if (s1
->u
.p
!= s2
->u
.p
)
8116 return s1
->u
.p
> s2
->u
.p
? 1 : -1;
8120 static struct elf_symbuf_head
*
8121 elf_create_symbuf (size_t symcount
, Elf_Internal_Sym
*isymbuf
)
8123 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
8124 struct elf_symbuf_symbol
*ssym
;
8125 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
8126 size_t i
, shndx_count
, total_size
, amt
;
8128 amt
= symcount
* sizeof (*indbuf
);
8129 indbuf
= (Elf_Internal_Sym
**) bfd_malloc (amt
);
8133 /* NB: When checking if 2 sections define the same set of local and
8134 global symbols, ignore both undefined and section symbols in the
8136 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
8137 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
8138 && ELF_ST_TYPE (isymbuf
[i
].st_info
) != STT_SECTION
)
8139 *ind
++ = &isymbuf
[i
];
8142 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
8143 elf_sort_elf_symbol
);
8146 if (indbufend
> indbuf
)
8147 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
8148 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
8151 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
8152 + (indbufend
- indbuf
) * sizeof (*ssym
));
8153 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
8154 if (ssymbuf
== NULL
)
8160 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
8161 ssymbuf
->ssym
= NULL
;
8162 ssymbuf
->count
= shndx_count
;
8163 ssymbuf
->st_shndx
= 0;
8164 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
8166 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
8169 ssymhead
->ssym
= ssym
;
8170 ssymhead
->count
= 0;
8171 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
8173 ssym
->st_name
= (*ind
)->st_name
;
8174 ssym
->st_info
= (*ind
)->st_info
;
8175 ssym
->st_other
= (*ind
)->st_other
;
8178 BFD_ASSERT ((size_t) (ssymhead
- ssymbuf
) == shndx_count
8179 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
8186 /* Check if 2 sections define the same set of local and global
8190 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
8191 struct bfd_link_info
*info
)
8194 const struct elf_backend_data
*bed1
, *bed2
;
8195 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8196 size_t symcount1
, symcount2
;
8197 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8198 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
8199 Elf_Internal_Sym
*isym
, *isymend
;
8200 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
8201 size_t count1
, count2
, i
;
8202 unsigned int shndx1
, shndx2
;
8208 /* Both sections have to be in ELF. */
8209 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8210 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8213 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8216 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8217 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8218 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
8221 bed1
= get_elf_backend_data (bfd1
);
8222 bed2
= get_elf_backend_data (bfd2
);
8223 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8224 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8225 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8226 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8228 if (symcount1
== 0 || symcount2
== 0)
8234 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
8235 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
8237 if (ssymbuf1
== NULL
)
8239 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8241 if (isymbuf1
== NULL
)
8244 if (info
!= NULL
&& !info
->reduce_memory_overheads
)
8246 ssymbuf1
= elf_create_symbuf (symcount1
, isymbuf1
);
8247 elf_tdata (bfd1
)->symbuf
= ssymbuf1
;
8251 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
8253 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8255 if (isymbuf2
== NULL
)
8258 if (ssymbuf1
!= NULL
&& info
!= NULL
&& !info
->reduce_memory_overheads
)
8260 ssymbuf2
= elf_create_symbuf (symcount2
, isymbuf2
);
8261 elf_tdata (bfd2
)->symbuf
= ssymbuf2
;
8265 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
8267 /* Optimized faster version. */
8269 struct elf_symbol
*symp
;
8270 struct elf_symbuf_symbol
*ssym
, *ssymend
;
8273 hi
= ssymbuf1
->count
;
8278 mid
= (lo
+ hi
) / 2;
8279 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
8281 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
8285 count1
= ssymbuf1
[mid
].count
;
8292 hi
= ssymbuf2
->count
;
8297 mid
= (lo
+ hi
) / 2;
8298 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
8300 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
8304 count2
= ssymbuf2
[mid
].count
;
8310 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8314 = (struct elf_symbol
*) bfd_malloc (count1
* sizeof (*symtable1
));
8316 = (struct elf_symbol
*) bfd_malloc (count2
* sizeof (*symtable2
));
8317 if (symtable1
== NULL
|| symtable2
== NULL
)
8321 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
8322 ssym
< ssymend
; ssym
++, symp
++)
8324 symp
->u
.ssym
= ssym
;
8325 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8331 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
8332 ssym
< ssymend
; ssym
++, symp
++)
8334 symp
->u
.ssym
= ssym
;
8335 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8340 /* Sort symbol by name. */
8341 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8342 elf_sym_name_compare
);
8343 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8344 elf_sym_name_compare
);
8346 for (i
= 0; i
< count1
; i
++)
8347 /* Two symbols must have the same binding, type and name. */
8348 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
8349 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
8350 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8357 symtable1
= (struct elf_symbol
*)
8358 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
8359 symtable2
= (struct elf_symbol
*)
8360 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
8361 if (symtable1
== NULL
|| symtable2
== NULL
)
8364 /* Count definitions in the section. */
8366 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
8367 if (isym
->st_shndx
== shndx1
)
8368 symtable1
[count1
++].u
.isym
= isym
;
8371 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
8372 if (isym
->st_shndx
== shndx2
)
8373 symtable2
[count2
++].u
.isym
= isym
;
8375 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8378 for (i
= 0; i
< count1
; i
++)
8380 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
8381 symtable1
[i
].u
.isym
->st_name
);
8383 for (i
= 0; i
< count2
; i
++)
8385 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
8386 symtable2
[i
].u
.isym
->st_name
);
8388 /* Sort symbol by name. */
8389 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8390 elf_sym_name_compare
);
8391 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8392 elf_sym_name_compare
);
8394 for (i
= 0; i
< count1
; i
++)
8395 /* Two symbols must have the same binding, type and name. */
8396 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
8397 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
8398 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
8412 /* Return TRUE if 2 section types are compatible. */
8415 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
8416 bfd
*bbfd
, const asection
*bsec
)
8420 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
8421 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
8424 return elf_section_type (asec
) == elf_section_type (bsec
);
8427 /* Final phase of ELF linker. */
8429 /* A structure we use to avoid passing large numbers of arguments. */
8431 struct elf_final_link_info
8433 /* General link information. */
8434 struct bfd_link_info
*info
;
8437 /* Symbol string table. */
8438 struct elf_strtab_hash
*symstrtab
;
8439 /* .hash section. */
8441 /* symbol version section (.gnu.version). */
8442 asection
*symver_sec
;
8443 /* Buffer large enough to hold contents of any section. */
8445 /* Buffer large enough to hold external relocs of any section. */
8446 void *external_relocs
;
8447 /* Buffer large enough to hold internal relocs of any section. */
8448 Elf_Internal_Rela
*internal_relocs
;
8449 /* Buffer large enough to hold external local symbols of any input
8451 bfd_byte
*external_syms
;
8452 /* And a buffer for symbol section indices. */
8453 Elf_External_Sym_Shndx
*locsym_shndx
;
8454 /* Buffer large enough to hold internal local symbols of any input
8456 Elf_Internal_Sym
*internal_syms
;
8457 /* Array large enough to hold a symbol index for each local symbol
8458 of any input BFD. */
8460 /* Array large enough to hold a section pointer for each local
8461 symbol of any input BFD. */
8462 asection
**sections
;
8463 /* Buffer for SHT_SYMTAB_SHNDX section. */
8464 Elf_External_Sym_Shndx
*symshndxbuf
;
8465 /* Number of STT_FILE syms seen. */
8466 size_t filesym_count
;
8467 /* Local symbol hash table. */
8468 struct bfd_hash_table local_hash_table
;
8471 struct local_hash_entry
8473 /* Base hash table entry structure. */
8474 struct bfd_hash_entry root
;
8475 /* Size of the local symbol name. */
8477 /* Number of the duplicated local symbol names. */
8481 /* Create an entry in the local symbol hash table. */
8483 static struct bfd_hash_entry
*
8484 local_hash_newfunc (struct bfd_hash_entry
*entry
,
8485 struct bfd_hash_table
*table
,
8489 /* Allocate the structure if it has not already been allocated by a
8493 entry
= bfd_hash_allocate (table
,
8494 sizeof (struct local_hash_entry
));
8499 /* Call the allocation method of the superclass. */
8500 entry
= bfd_hash_newfunc (entry
, table
, string
);
8503 ((struct local_hash_entry
*) entry
)->count
= 0;
8504 ((struct local_hash_entry
*) entry
)->size
= 0;
8510 /* This struct is used to pass information to elf_link_output_extsym. */
8512 struct elf_outext_info
8515 bfd_boolean localsyms
;
8516 bfd_boolean file_sym_done
;
8517 struct elf_final_link_info
*flinfo
;
8521 /* Support for evaluating a complex relocation.
8523 Complex relocations are generalized, self-describing relocations. The
8524 implementation of them consists of two parts: complex symbols, and the
8525 relocations themselves.
8527 The relocations use a reserved elf-wide relocation type code (R_RELC
8528 external / BFD_RELOC_RELC internal) and an encoding of relocation field
8529 information (start bit, end bit, word width, etc) into the addend. This
8530 information is extracted from CGEN-generated operand tables within gas.
8532 Complex symbols are mangled symbols (STT_RELC external / BSF_RELC
8533 internal) representing prefix-notation expressions, including but not
8534 limited to those sorts of expressions normally encoded as addends in the
8535 addend field. The symbol mangling format is:
8538 | <unary-operator> ':' <node>
8539 | <binary-operator> ':' <node> ':' <node>
8542 <literal> := 's' <digits=N> ':' <N character symbol name>
8543 | 'S' <digits=N> ':' <N character section name>
8547 <binary-operator> := as in C
8548 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
8551 set_symbol_value (bfd
*bfd_with_globals
,
8552 Elf_Internal_Sym
*isymbuf
,
8557 struct elf_link_hash_entry
**sym_hashes
;
8558 struct elf_link_hash_entry
*h
;
8559 size_t extsymoff
= locsymcount
;
8561 if (symidx
< locsymcount
)
8563 Elf_Internal_Sym
*sym
;
8565 sym
= isymbuf
+ symidx
;
8566 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
8568 /* It is a local symbol: move it to the
8569 "absolute" section and give it a value. */
8570 sym
->st_shndx
= SHN_ABS
;
8571 sym
->st_value
= val
;
8574 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
8578 /* It is a global symbol: set its link type
8579 to "defined" and give it a value. */
8581 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
8582 h
= sym_hashes
[symidx
- extsymoff
];
8583 while (h
->root
.type
== bfd_link_hash_indirect
8584 || h
->root
.type
== bfd_link_hash_warning
)
8585 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8586 h
->root
.type
= bfd_link_hash_defined
;
8587 h
->root
.u
.def
.value
= val
;
8588 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
8592 resolve_symbol (const char *name
,
8594 struct elf_final_link_info
*flinfo
,
8596 Elf_Internal_Sym
*isymbuf
,
8599 Elf_Internal_Sym
*sym
;
8600 struct bfd_link_hash_entry
*global_entry
;
8601 const char *candidate
= NULL
;
8602 Elf_Internal_Shdr
*symtab_hdr
;
8605 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
8607 for (i
= 0; i
< locsymcount
; ++ i
)
8611 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
8614 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
8615 symtab_hdr
->sh_link
,
8618 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
8619 name
, candidate
, (unsigned long) sym
->st_value
);
8621 if (candidate
&& strcmp (candidate
, name
) == 0)
8623 asection
*sec
= flinfo
->sections
[i
];
8625 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
8626 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
8628 printf ("Found symbol with value %8.8lx\n",
8629 (unsigned long) *result
);
8635 /* Hmm, haven't found it yet. perhaps it is a global. */
8636 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
8637 FALSE
, FALSE
, TRUE
);
8641 if (global_entry
->type
== bfd_link_hash_defined
8642 || global_entry
->type
== bfd_link_hash_defweak
)
8644 *result
= (global_entry
->u
.def
.value
8645 + global_entry
->u
.def
.section
->output_section
->vma
8646 + global_entry
->u
.def
.section
->output_offset
);
8648 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
8649 global_entry
->root
.string
, (unsigned long) *result
);
8657 /* Looks up NAME in SECTIONS. If found sets RESULT to NAME's address (in
8658 bytes) and returns TRUE, otherwise returns FALSE. Accepts pseudo-section
8659 names like "foo.end" which is the end address of section "foo". */
8662 resolve_section (const char *name
,
8670 for (curr
= sections
; curr
; curr
= curr
->next
)
8671 if (strcmp (curr
->name
, name
) == 0)
8673 *result
= curr
->vma
;
8677 /* Hmm. still haven't found it. try pseudo-section names. */
8678 /* FIXME: This could be coded more efficiently... */
8679 for (curr
= sections
; curr
; curr
= curr
->next
)
8681 len
= strlen (curr
->name
);
8682 if (len
> strlen (name
))
8685 if (strncmp (curr
->name
, name
, len
) == 0)
8687 if (strncmp (".end", name
+ len
, 4) == 0)
8689 *result
= (curr
->vma
8690 + curr
->size
/ bfd_octets_per_byte (abfd
, curr
));
8694 /* Insert more pseudo-section names here, if you like. */
8702 undefined_reference (const char *reftype
, const char *name
)
8704 /* xgettext:c-format */
8705 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
8707 bfd_set_error (bfd_error_bad_value
);
8711 eval_symbol (bfd_vma
*result
,
8714 struct elf_final_link_info
*flinfo
,
8716 Elf_Internal_Sym
*isymbuf
,
8725 const char *sym
= *symp
;
8727 bfd_boolean symbol_is_section
= FALSE
;
8732 if (len
< 1 || len
> sizeof (symbuf
))
8734 bfd_set_error (bfd_error_invalid_operation
);
8747 *result
= strtoul (sym
, (char **) symp
, 16);
8751 symbol_is_section
= TRUE
;
8755 symlen
= strtol (sym
, (char **) symp
, 10);
8756 sym
= *symp
+ 1; /* Skip the trailing ':'. */
8758 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
8760 bfd_set_error (bfd_error_invalid_operation
);
8764 memcpy (symbuf
, sym
, symlen
);
8765 symbuf
[symlen
] = '\0';
8766 *symp
= sym
+ symlen
;
8768 /* Is it always possible, with complex symbols, that gas "mis-guessed"
8769 the symbol as a section, or vice-versa. so we're pretty liberal in our
8770 interpretation here; section means "try section first", not "must be a
8771 section", and likewise with symbol. */
8773 if (symbol_is_section
)
8775 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
, input_bfd
)
8776 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
8777 isymbuf
, locsymcount
))
8779 undefined_reference ("section", symbuf
);
8785 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
8786 isymbuf
, locsymcount
)
8787 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
8790 undefined_reference ("symbol", symbuf
);
8797 /* All that remains are operators. */
8799 #define UNARY_OP(op) \
8800 if (strncmp (sym, #op, strlen (#op)) == 0) \
8802 sym += strlen (#op); \
8806 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
8807 isymbuf, locsymcount, signed_p)) \
8810 *result = op ((bfd_signed_vma) a); \
8816 #define BINARY_OP_HEAD(op) \
8817 if (strncmp (sym, #op, strlen (#op)) == 0) \
8819 sym += strlen (#op); \
8823 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
8824 isymbuf, locsymcount, signed_p)) \
8827 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
8828 isymbuf, locsymcount, signed_p)) \
8830 #define BINARY_OP_TAIL(op) \
8832 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
8837 #define BINARY_OP(op) BINARY_OP_HEAD(op) BINARY_OP_TAIL(op)
8841 BINARY_OP_HEAD (<<);
8842 if (b
>= sizeof (a
) * CHAR_BIT
)
8848 BINARY_OP_TAIL (<<);
8849 BINARY_OP_HEAD (>>);
8850 if (b
>= sizeof (a
) * CHAR_BIT
)
8852 *result
= signed_p
&& (bfd_signed_vma
) a
< 0 ? -1 : 0;
8855 BINARY_OP_TAIL (>>);
8868 _bfd_error_handler (_("division by zero"));
8869 bfd_set_error (bfd_error_bad_value
);
8876 _bfd_error_handler (_("division by zero"));
8877 bfd_set_error (bfd_error_bad_value
);
8890 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
8891 bfd_set_error (bfd_error_invalid_operation
);
8897 put_value (bfd_vma size
,
8898 unsigned long chunksz
,
8903 location
+= (size
- chunksz
);
8905 for (; size
; size
-= chunksz
, location
-= chunksz
)
8910 bfd_put_8 (input_bfd
, x
, location
);
8914 bfd_put_16 (input_bfd
, x
, location
);
8918 bfd_put_32 (input_bfd
, x
, location
);
8919 /* Computed this way because x >>= 32 is undefined if x is a 32-bit value. */
8925 bfd_put_64 (input_bfd
, x
, location
);
8926 /* Computed this way because x >>= 64 is undefined if x is a 64-bit value. */
8939 get_value (bfd_vma size
,
8940 unsigned long chunksz
,
8947 /* Sanity checks. */
8948 BFD_ASSERT (chunksz
<= sizeof (x
)
8951 && (size
% chunksz
) == 0
8952 && input_bfd
!= NULL
8953 && location
!= NULL
);
8955 if (chunksz
== sizeof (x
))
8957 BFD_ASSERT (size
== chunksz
);
8959 /* Make sure that we do not perform an undefined shift operation.
8960 We know that size == chunksz so there will only be one iteration
8961 of the loop below. */
8965 shift
= 8 * chunksz
;
8967 for (; size
; size
-= chunksz
, location
+= chunksz
)
8972 x
= (x
<< shift
) | bfd_get_8 (input_bfd
, location
);
8975 x
= (x
<< shift
) | bfd_get_16 (input_bfd
, location
);
8978 x
= (x
<< shift
) | bfd_get_32 (input_bfd
, location
);
8982 x
= (x
<< shift
) | bfd_get_64 (input_bfd
, location
);
8993 decode_complex_addend (unsigned long *start
, /* in bits */
8994 unsigned long *oplen
, /* in bits */
8995 unsigned long *len
, /* in bits */
8996 unsigned long *wordsz
, /* in bytes */
8997 unsigned long *chunksz
, /* in bytes */
8998 unsigned long *lsb0_p
,
8999 unsigned long *signed_p
,
9000 unsigned long *trunc_p
,
9001 unsigned long encoded
)
9003 * start
= encoded
& 0x3F;
9004 * len
= (encoded
>> 6) & 0x3F;
9005 * oplen
= (encoded
>> 12) & 0x3F;
9006 * wordsz
= (encoded
>> 18) & 0xF;
9007 * chunksz
= (encoded
>> 22) & 0xF;
9008 * lsb0_p
= (encoded
>> 27) & 1;
9009 * signed_p
= (encoded
>> 28) & 1;
9010 * trunc_p
= (encoded
>> 29) & 1;
9013 bfd_reloc_status_type
9014 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
9015 asection
*input_section
,
9017 Elf_Internal_Rela
*rel
,
9020 bfd_vma shift
, x
, mask
;
9021 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
9022 bfd_reloc_status_type r
;
9023 bfd_size_type octets
;
9025 /* Perform this reloc, since it is complex.
9026 (this is not to say that it necessarily refers to a complex
9027 symbol; merely that it is a self-describing CGEN based reloc.
9028 i.e. the addend has the complete reloc information (bit start, end,
9029 word size, etc) encoded within it.). */
9031 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
9032 &chunksz
, &lsb0_p
, &signed_p
,
9033 &trunc_p
, rel
->r_addend
);
9035 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
9038 shift
= (start
+ 1) - len
;
9040 shift
= (8 * wordsz
) - (start
+ len
);
9042 octets
= rel
->r_offset
* bfd_octets_per_byte (input_bfd
, input_section
);
9043 x
= get_value (wordsz
, chunksz
, input_bfd
, contents
+ octets
);
9046 printf ("Doing complex reloc: "
9047 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
9048 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
9049 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
9050 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
9051 oplen
, (unsigned long) x
, (unsigned long) mask
,
9052 (unsigned long) relocation
);
9057 /* Now do an overflow check. */
9058 r
= bfd_check_overflow ((signed_p
9059 ? complain_overflow_signed
9060 : complain_overflow_unsigned
),
9061 len
, 0, (8 * wordsz
),
9065 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
9068 printf (" relocation: %8.8lx\n"
9069 " shifted mask: %8.8lx\n"
9070 " shifted/masked reloc: %8.8lx\n"
9071 " result: %8.8lx\n",
9072 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
9073 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
9075 put_value (wordsz
, chunksz
, input_bfd
, x
, contents
+ octets
);
9079 /* Functions to read r_offset from external (target order) reloc
9080 entry. Faster than bfd_getl32 et al, because we let the compiler
9081 know the value is aligned. */
9084 ext32l_r_offset (const void *p
)
9091 const union aligned32
*a
9092 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
9094 uint32_t aval
= ( (uint32_t) a
->c
[0]
9095 | (uint32_t) a
->c
[1] << 8
9096 | (uint32_t) a
->c
[2] << 16
9097 | (uint32_t) a
->c
[3] << 24);
9102 ext32b_r_offset (const void *p
)
9109 const union aligned32
*a
9110 = (const union aligned32
*) &((const Elf32_External_Rel
*) p
)->r_offset
;
9112 uint32_t aval
= ( (uint32_t) a
->c
[0] << 24
9113 | (uint32_t) a
->c
[1] << 16
9114 | (uint32_t) a
->c
[2] << 8
9115 | (uint32_t) a
->c
[3]);
9119 #ifdef BFD_HOST_64_BIT
9121 ext64l_r_offset (const void *p
)
9128 const union aligned64
*a
9129 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
9131 uint64_t aval
= ( (uint64_t) a
->c
[0]
9132 | (uint64_t) a
->c
[1] << 8
9133 | (uint64_t) a
->c
[2] << 16
9134 | (uint64_t) a
->c
[3] << 24
9135 | (uint64_t) a
->c
[4] << 32
9136 | (uint64_t) a
->c
[5] << 40
9137 | (uint64_t) a
->c
[6] << 48
9138 | (uint64_t) a
->c
[7] << 56);
9143 ext64b_r_offset (const void *p
)
9150 const union aligned64
*a
9151 = (const union aligned64
*) &((const Elf64_External_Rel
*) p
)->r_offset
;
9153 uint64_t aval
= ( (uint64_t) a
->c
[0] << 56
9154 | (uint64_t) a
->c
[1] << 48
9155 | (uint64_t) a
->c
[2] << 40
9156 | (uint64_t) a
->c
[3] << 32
9157 | (uint64_t) a
->c
[4] << 24
9158 | (uint64_t) a
->c
[5] << 16
9159 | (uint64_t) a
->c
[6] << 8
9160 | (uint64_t) a
->c
[7]);
9165 /* When performing a relocatable link, the input relocations are
9166 preserved. But, if they reference global symbols, the indices
9167 referenced must be updated. Update all the relocations found in
9171 elf_link_adjust_relocs (bfd
*abfd
,
9173 struct bfd_elf_section_reloc_data
*reldata
,
9175 struct bfd_link_info
*info
)
9178 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
9180 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
9181 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
9182 bfd_vma r_type_mask
;
9184 unsigned int count
= reldata
->count
;
9185 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
9187 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
9189 swap_in
= bed
->s
->swap_reloc_in
;
9190 swap_out
= bed
->s
->swap_reloc_out
;
9192 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
9194 swap_in
= bed
->s
->swap_reloca_in
;
9195 swap_out
= bed
->s
->swap_reloca_out
;
9200 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
9203 if (bed
->s
->arch_size
== 32)
9210 r_type_mask
= 0xffffffff;
9214 erela
= reldata
->hdr
->contents
;
9215 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
9217 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
9220 if (*rel_hash
== NULL
)
9223 if ((*rel_hash
)->indx
== -2
9224 && info
->gc_sections
9225 && ! info
->gc_keep_exported
)
9227 /* PR 21524: Let the user know if a symbol was removed by garbage collection. */
9228 _bfd_error_handler (_("%pB:%pA: error: relocation references symbol %s which was removed by garbage collection"),
9230 (*rel_hash
)->root
.root
.string
);
9231 _bfd_error_handler (_("%pB:%pA: error: try relinking with --gc-keep-exported enabled"),
9233 bfd_set_error (bfd_error_invalid_operation
);
9236 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
9238 (*swap_in
) (abfd
, erela
, irela
);
9239 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
9240 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
9241 | (irela
[j
].r_info
& r_type_mask
));
9242 (*swap_out
) (abfd
, irela
, erela
);
9245 if (bed
->elf_backend_update_relocs
)
9246 (*bed
->elf_backend_update_relocs
) (sec
, reldata
);
9248 if (sort
&& count
!= 0)
9250 bfd_vma (*ext_r_off
) (const void *);
9253 bfd_byte
*base
, *end
, *p
, *loc
;
9254 bfd_byte
*buf
= NULL
;
9256 if (bed
->s
->arch_size
== 32)
9258 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
9259 ext_r_off
= ext32l_r_offset
;
9260 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
9261 ext_r_off
= ext32b_r_offset
;
9267 #ifdef BFD_HOST_64_BIT
9268 if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_LITTLE
)
9269 ext_r_off
= ext64l_r_offset
;
9270 else if (abfd
->xvec
->header_byteorder
== BFD_ENDIAN_BIG
)
9271 ext_r_off
= ext64b_r_offset
;
9277 /* Must use a stable sort here. A modified insertion sort,
9278 since the relocs are mostly sorted already. */
9279 elt_size
= reldata
->hdr
->sh_entsize
;
9280 base
= reldata
->hdr
->contents
;
9281 end
= base
+ count
* elt_size
;
9282 if (elt_size
> sizeof (Elf64_External_Rela
))
9285 /* Ensure the first element is lowest. This acts as a sentinel,
9286 speeding the main loop below. */
9287 r_off
= (*ext_r_off
) (base
);
9288 for (p
= loc
= base
; (p
+= elt_size
) < end
; )
9290 bfd_vma r_off2
= (*ext_r_off
) (p
);
9299 /* Don't just swap *base and *loc as that changes the order
9300 of the original base[0] and base[1] if they happen to
9301 have the same r_offset. */
9302 bfd_byte onebuf
[sizeof (Elf64_External_Rela
)];
9303 memcpy (onebuf
, loc
, elt_size
);
9304 memmove (base
+ elt_size
, base
, loc
- base
);
9305 memcpy (base
, onebuf
, elt_size
);
9308 for (p
= base
+ elt_size
; (p
+= elt_size
) < end
; )
9310 /* base to p is sorted, *p is next to insert. */
9311 r_off
= (*ext_r_off
) (p
);
9312 /* Search the sorted region for location to insert. */
9314 while (r_off
< (*ext_r_off
) (loc
))
9319 /* Chances are there is a run of relocs to insert here,
9320 from one of more input files. Files are not always
9321 linked in order due to the way elf_link_input_bfd is
9322 called. See pr17666. */
9323 size_t sortlen
= p
- loc
;
9324 bfd_vma r_off2
= (*ext_r_off
) (loc
);
9325 size_t runlen
= elt_size
;
9326 size_t buf_size
= 96 * 1024;
9327 while (p
+ runlen
< end
9328 && (sortlen
<= buf_size
9329 || runlen
+ elt_size
<= buf_size
)
9330 && r_off2
> (*ext_r_off
) (p
+ runlen
))
9334 buf
= bfd_malloc (buf_size
);
9338 if (runlen
< sortlen
)
9340 memcpy (buf
, p
, runlen
);
9341 memmove (loc
+ runlen
, loc
, sortlen
);
9342 memcpy (loc
, buf
, runlen
);
9346 memcpy (buf
, loc
, sortlen
);
9347 memmove (loc
, p
, runlen
);
9348 memcpy (loc
+ runlen
, buf
, sortlen
);
9350 p
+= runlen
- elt_size
;
9353 /* Hashes are no longer valid. */
9354 free (reldata
->hashes
);
9355 reldata
->hashes
= NULL
;
9361 struct elf_link_sort_rela
9367 enum elf_reloc_type_class type
;
9368 /* We use this as an array of size int_rels_per_ext_rel. */
9369 Elf_Internal_Rela rela
[1];
9372 /* qsort stability here and for cmp2 is only an issue if multiple
9373 dynamic relocations are emitted at the same address. But targets
9374 that apply a series of dynamic relocations each operating on the
9375 result of the prior relocation can't use -z combreloc as
9376 implemented anyway. Such schemes tend to be broken by sorting on
9377 symbol index. That leaves dynamic NONE relocs as the only other
9378 case where ld might emit multiple relocs at the same address, and
9379 those are only emitted due to target bugs. */
9382 elf_link_sort_cmp1 (const void *A
, const void *B
)
9384 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
9385 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
9386 int relativea
, relativeb
;
9388 relativea
= a
->type
== reloc_class_relative
;
9389 relativeb
= b
->type
== reloc_class_relative
;
9391 if (relativea
< relativeb
)
9393 if (relativea
> relativeb
)
9395 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
9397 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
9399 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
9401 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
9407 elf_link_sort_cmp2 (const void *A
, const void *B
)
9409 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
9410 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
9412 if (a
->type
< b
->type
)
9414 if (a
->type
> b
->type
)
9416 if (a
->u
.offset
< b
->u
.offset
)
9418 if (a
->u
.offset
> b
->u
.offset
)
9420 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
9422 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
9428 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
9430 asection
*dynamic_relocs
;
9433 bfd_size_type count
, size
;
9434 size_t i
, ret
, sort_elt
, ext_size
;
9435 bfd_byte
*sort
, *s_non_relative
, *p
;
9436 struct elf_link_sort_rela
*sq
;
9437 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
9438 int i2e
= bed
->s
->int_rels_per_ext_rel
;
9439 unsigned int opb
= bfd_octets_per_byte (abfd
, NULL
);
9440 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
9441 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
9442 struct bfd_link_order
*lo
;
9444 bfd_boolean use_rela
;
9446 /* Find a dynamic reloc section. */
9447 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
9448 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
9449 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
9450 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
9452 bfd_boolean use_rela_initialised
= FALSE
;
9454 /* This is just here to stop gcc from complaining.
9455 Its initialization checking code is not perfect. */
9458 /* Both sections are present. Examine the sizes
9459 of the indirect sections to help us choose. */
9460 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9461 if (lo
->type
== bfd_indirect_link_order
)
9463 asection
*o
= lo
->u
.indirect
.section
;
9465 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
9467 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9468 /* Section size is divisible by both rel and rela sizes.
9469 It is of no help to us. */
9473 /* Section size is only divisible by rela. */
9474 if (use_rela_initialised
&& !use_rela
)
9476 _bfd_error_handler (_("%pB: unable to sort relocs - "
9477 "they are in more than one size"),
9479 bfd_set_error (bfd_error_invalid_operation
);
9485 use_rela_initialised
= TRUE
;
9489 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9491 /* Section size is only divisible by rel. */
9492 if (use_rela_initialised
&& use_rela
)
9494 _bfd_error_handler (_("%pB: unable to sort relocs - "
9495 "they are in more than one size"),
9497 bfd_set_error (bfd_error_invalid_operation
);
9503 use_rela_initialised
= TRUE
;
9508 /* The section size is not divisible by either -
9509 something is wrong. */
9510 _bfd_error_handler (_("%pB: unable to sort relocs - "
9511 "they are of an unknown size"), abfd
);
9512 bfd_set_error (bfd_error_invalid_operation
);
9517 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9518 if (lo
->type
== bfd_indirect_link_order
)
9520 asection
*o
= lo
->u
.indirect
.section
;
9522 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
9524 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9525 /* Section size is divisible by both rel and rela sizes.
9526 It is of no help to us. */
9530 /* Section size is only divisible by rela. */
9531 if (use_rela_initialised
&& !use_rela
)
9533 _bfd_error_handler (_("%pB: unable to sort relocs - "
9534 "they are in more than one size"),
9536 bfd_set_error (bfd_error_invalid_operation
);
9542 use_rela_initialised
= TRUE
;
9546 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
9548 /* Section size is only divisible by rel. */
9549 if (use_rela_initialised
&& use_rela
)
9551 _bfd_error_handler (_("%pB: unable to sort relocs - "
9552 "they are in more than one size"),
9554 bfd_set_error (bfd_error_invalid_operation
);
9560 use_rela_initialised
= TRUE
;
9565 /* The section size is not divisible by either -
9566 something is wrong. */
9567 _bfd_error_handler (_("%pB: unable to sort relocs - "
9568 "they are of an unknown size"), abfd
);
9569 bfd_set_error (bfd_error_invalid_operation
);
9574 if (! use_rela_initialised
)
9578 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
9580 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
9587 dynamic_relocs
= rela_dyn
;
9588 ext_size
= bed
->s
->sizeof_rela
;
9589 swap_in
= bed
->s
->swap_reloca_in
;
9590 swap_out
= bed
->s
->swap_reloca_out
;
9594 dynamic_relocs
= rel_dyn
;
9595 ext_size
= bed
->s
->sizeof_rel
;
9596 swap_in
= bed
->s
->swap_reloc_in
;
9597 swap_out
= bed
->s
->swap_reloc_out
;
9601 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9602 if (lo
->type
== bfd_indirect_link_order
)
9603 size
+= lo
->u
.indirect
.section
->size
;
9605 if (size
!= dynamic_relocs
->size
)
9608 sort_elt
= (sizeof (struct elf_link_sort_rela
)
9609 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
9611 count
= dynamic_relocs
->size
/ ext_size
;
9614 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
9618 (*info
->callbacks
->warning
)
9619 (info
, _("not enough memory to sort relocations"), 0, abfd
, 0, 0);
9623 if (bed
->s
->arch_size
== 32)
9624 r_sym_mask
= ~(bfd_vma
) 0xff;
9626 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
9628 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9629 if (lo
->type
== bfd_indirect_link_order
)
9631 bfd_byte
*erel
, *erelend
;
9632 asection
*o
= lo
->u
.indirect
.section
;
9634 if (o
->contents
== NULL
&& o
->size
!= 0)
9636 /* This is a reloc section that is being handled as a normal
9637 section. See bfd_section_from_shdr. We can't combine
9638 relocs in this case. */
9643 erelend
= o
->contents
+ o
->size
;
9644 p
= sort
+ o
->output_offset
* opb
/ ext_size
* sort_elt
;
9646 while (erel
< erelend
)
9648 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9650 (*swap_in
) (abfd
, erel
, s
->rela
);
9651 s
->type
= (*bed
->elf_backend_reloc_type_class
) (info
, o
, s
->rela
);
9652 s
->u
.sym_mask
= r_sym_mask
;
9658 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
9660 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
9662 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9663 if (s
->type
!= reloc_class_relative
)
9669 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
9670 for (; i
< count
; i
++, p
+= sort_elt
)
9672 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
9673 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
9675 sp
->u
.offset
= sq
->rela
->r_offset
;
9678 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
9680 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
9681 if (htab
->srelplt
&& htab
->srelplt
->output_section
== dynamic_relocs
)
9683 /* We have plt relocs in .rela.dyn. */
9684 sq
= (struct elf_link_sort_rela
*) sort
;
9685 for (i
= 0; i
< count
; i
++)
9686 if (sq
[count
- i
- 1].type
!= reloc_class_plt
)
9688 if (i
!= 0 && htab
->srelplt
->size
== i
* ext_size
)
9690 struct bfd_link_order
**plo
;
9691 /* Put srelplt link_order last. This is so the output_offset
9692 set in the next loop is correct for DT_JMPREL. */
9693 for (plo
= &dynamic_relocs
->map_head
.link_order
; *plo
!= NULL
; )
9694 if ((*plo
)->type
== bfd_indirect_link_order
9695 && (*plo
)->u
.indirect
.section
== htab
->srelplt
)
9701 plo
= &(*plo
)->next
;
9704 dynamic_relocs
->map_tail
.link_order
= lo
;
9709 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
9710 if (lo
->type
== bfd_indirect_link_order
)
9712 bfd_byte
*erel
, *erelend
;
9713 asection
*o
= lo
->u
.indirect
.section
;
9716 erelend
= o
->contents
+ o
->size
;
9717 o
->output_offset
= (p
- sort
) / sort_elt
* ext_size
/ opb
;
9718 while (erel
< erelend
)
9720 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
9721 (*swap_out
) (abfd
, s
->rela
, erel
);
9728 *psec
= dynamic_relocs
;
9732 /* Add a symbol to the output symbol string table. */
9735 elf_link_output_symstrtab (struct elf_final_link_info
*flinfo
,
9737 Elf_Internal_Sym
*elfsym
,
9738 asection
*input_sec
,
9739 struct elf_link_hash_entry
*h
)
9741 int (*output_symbol_hook
)
9742 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
9743 struct elf_link_hash_entry
*);
9744 struct elf_link_hash_table
*hash_table
;
9745 const struct elf_backend_data
*bed
;
9746 bfd_size_type strtabsize
;
9748 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
9750 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9751 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
9752 if (output_symbol_hook
!= NULL
)
9754 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
9759 if (ELF_ST_TYPE (elfsym
->st_info
) == STT_GNU_IFUNC
)
9760 elf_tdata (flinfo
->output_bfd
)->has_gnu_osabi
|= elf_gnu_osabi_ifunc
;
9761 if (ELF_ST_BIND (elfsym
->st_info
) == STB_GNU_UNIQUE
)
9762 elf_tdata (flinfo
->output_bfd
)->has_gnu_osabi
|= elf_gnu_osabi_unique
;
9766 || (input_sec
->flags
& SEC_EXCLUDE
))
9767 elfsym
->st_name
= (unsigned long) -1;
9770 /* Call _bfd_elf_strtab_offset after _bfd_elf_strtab_finalize
9771 to get the final offset for st_name. */
9772 char *versioned_name
= (char *) name
;
9775 if (h
->versioned
== versioned
&& h
->def_dynamic
)
9777 /* Keep only one '@' for versioned symbols defined in
9779 char *version
= strrchr (name
, ELF_VER_CHR
);
9780 char *base_end
= strchr (name
, ELF_VER_CHR
);
9781 if (version
!= base_end
)
9784 size_t len
= strlen (name
);
9785 versioned_name
= bfd_alloc (flinfo
->output_bfd
, len
);
9786 if (versioned_name
== NULL
)
9788 base_len
= base_end
- name
;
9789 memcpy (versioned_name
, name
, base_len
);
9790 memcpy (versioned_name
+ base_len
, version
,
9795 else if (flinfo
->info
->unique_symbol
9796 && ELF_ST_BIND (elfsym
->st_info
) == STB_LOCAL
)
9798 struct local_hash_entry
*lh
;
9799 switch (ELF_ST_TYPE (elfsym
->st_info
))
9805 lh
= (struct local_hash_entry
*) bfd_hash_lookup
9806 (&flinfo
->local_hash_table
, name
, TRUE
, FALSE
);
9811 /* Append ".COUNT" to duplicated local symbols. */
9813 size_t base_len
= lh
->size
;
9815 sprintf (buf
, "%lx", lh
->count
);
9818 base_len
= strlen (name
);
9819 lh
->size
= base_len
;
9821 count_len
= strlen (buf
);
9822 versioned_name
= bfd_alloc (flinfo
->output_bfd
,
9823 base_len
+ count_len
+ 2);
9824 if (versioned_name
== NULL
)
9826 memcpy (versioned_name
, name
, base_len
);
9827 versioned_name
[base_len
] = '.';
9828 memcpy (versioned_name
+ base_len
+ 1, buf
,
9836 = (unsigned long) _bfd_elf_strtab_add (flinfo
->symstrtab
,
9837 versioned_name
, FALSE
);
9838 if (elfsym
->st_name
== (unsigned long) -1)
9842 hash_table
= elf_hash_table (flinfo
->info
);
9843 strtabsize
= hash_table
->strtabsize
;
9844 if (strtabsize
<= hash_table
->strtabcount
)
9846 strtabsize
+= strtabsize
;
9847 hash_table
->strtabsize
= strtabsize
;
9848 strtabsize
*= sizeof (*hash_table
->strtab
);
9850 = (struct elf_sym_strtab
*) bfd_realloc (hash_table
->strtab
,
9852 if (hash_table
->strtab
== NULL
)
9855 hash_table
->strtab
[hash_table
->strtabcount
].sym
= *elfsym
;
9856 hash_table
->strtab
[hash_table
->strtabcount
].dest_index
9857 = hash_table
->strtabcount
;
9858 hash_table
->strtab
[hash_table
->strtabcount
].destshndx_index
9859 = flinfo
->symshndxbuf
? bfd_get_symcount (flinfo
->output_bfd
) : 0;
9861 flinfo
->output_bfd
->symcount
+= 1;
9862 hash_table
->strtabcount
+= 1;
9867 /* Swap symbols out to the symbol table and flush the output symbols to
9871 elf_link_swap_symbols_out (struct elf_final_link_info
*flinfo
)
9873 struct elf_link_hash_table
*hash_table
= elf_hash_table (flinfo
->info
);
9876 const struct elf_backend_data
*bed
;
9878 Elf_Internal_Shdr
*hdr
;
9882 if (!hash_table
->strtabcount
)
9885 BFD_ASSERT (elf_onesymtab (flinfo
->output_bfd
));
9887 bed
= get_elf_backend_data (flinfo
->output_bfd
);
9889 amt
= bed
->s
->sizeof_sym
* hash_table
->strtabcount
;
9890 symbuf
= (bfd_byte
*) bfd_malloc (amt
);
9894 if (flinfo
->symshndxbuf
)
9896 amt
= sizeof (Elf_External_Sym_Shndx
);
9897 amt
*= bfd_get_symcount (flinfo
->output_bfd
);
9898 flinfo
->symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
9899 if (flinfo
->symshndxbuf
== NULL
)
9906 /* Now swap out the symbols. */
9907 for (i
= 0; i
< hash_table
->strtabcount
; i
++)
9909 struct elf_sym_strtab
*elfsym
= &hash_table
->strtab
[i
];
9910 if (elfsym
->sym
.st_name
== (unsigned long) -1)
9911 elfsym
->sym
.st_name
= 0;
9914 = (unsigned long) _bfd_elf_strtab_offset (flinfo
->symstrtab
,
9915 elfsym
->sym
.st_name
);
9917 /* Inform the linker of the addition of this symbol. */
9919 if (flinfo
->info
->callbacks
->ctf_new_symbol
)
9920 flinfo
->info
->callbacks
->ctf_new_symbol (elfsym
->dest_index
,
9923 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &elfsym
->sym
,
9924 ((bfd_byte
*) symbuf
9925 + (elfsym
->dest_index
9926 * bed
->s
->sizeof_sym
)),
9927 (flinfo
->symshndxbuf
9928 + elfsym
->destshndx_index
));
9931 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
9932 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
9933 amt
= hash_table
->strtabcount
* bed
->s
->sizeof_sym
;
9934 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) == 0
9935 && bfd_bwrite (symbuf
, amt
, flinfo
->output_bfd
) == amt
)
9937 hdr
->sh_size
+= amt
;
9945 free (hash_table
->strtab
);
9946 hash_table
->strtab
= NULL
;
9951 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
9954 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
9956 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
9957 && sym
->st_shndx
< SHN_LORESERVE
)
9959 /* The gABI doesn't support dynamic symbols in output sections
9962 /* xgettext:c-format */
9963 (_("%pB: too many sections: %d (>= %d)"),
9964 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
9965 bfd_set_error (bfd_error_nonrepresentable_section
);
9971 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
9972 allowing an unsatisfied unversioned symbol in the DSO to match a
9973 versioned symbol that would normally require an explicit version.
9974 We also handle the case that a DSO references a hidden symbol
9975 which may be satisfied by a versioned symbol in another DSO. */
9978 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
9979 const struct elf_backend_data
*bed
,
9980 struct elf_link_hash_entry
*h
)
9983 struct elf_link_loaded_list
*loaded
;
9985 if (!is_elf_hash_table (info
->hash
))
9988 /* Check indirect symbol. */
9989 while (h
->root
.type
== bfd_link_hash_indirect
)
9990 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9992 switch (h
->root
.type
)
9998 case bfd_link_hash_undefined
:
9999 case bfd_link_hash_undefweak
:
10000 abfd
= h
->root
.u
.undef
.abfd
;
10002 || (abfd
->flags
& DYNAMIC
) == 0
10003 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
10007 case bfd_link_hash_defined
:
10008 case bfd_link_hash_defweak
:
10009 abfd
= h
->root
.u
.def
.section
->owner
;
10012 case bfd_link_hash_common
:
10013 abfd
= h
->root
.u
.c
.p
->section
->owner
;
10016 BFD_ASSERT (abfd
!= NULL
);
10018 for (loaded
= elf_hash_table (info
)->dyn_loaded
;
10020 loaded
= loaded
->next
)
10023 Elf_Internal_Shdr
*hdr
;
10025 size_t extsymcount
;
10027 Elf_Internal_Shdr
*versymhdr
;
10028 Elf_Internal_Sym
*isym
;
10029 Elf_Internal_Sym
*isymend
;
10030 Elf_Internal_Sym
*isymbuf
;
10031 Elf_External_Versym
*ever
;
10032 Elf_External_Versym
*extversym
;
10034 input
= loaded
->abfd
;
10036 /* We check each DSO for a possible hidden versioned definition. */
10038 || elf_dynversym (input
) == 0)
10041 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
10043 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
10044 if (elf_bad_symtab (input
))
10046 extsymcount
= symcount
;
10051 extsymcount
= symcount
- hdr
->sh_info
;
10052 extsymoff
= hdr
->sh_info
;
10055 if (extsymcount
== 0)
10058 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
10060 if (isymbuf
== NULL
)
10063 /* Read in any version definitions. */
10064 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
10065 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
10066 || (extversym
= (Elf_External_Versym
*)
10067 _bfd_malloc_and_read (input
, versymhdr
->sh_size
,
10068 versymhdr
->sh_size
)) == NULL
)
10074 ever
= extversym
+ extsymoff
;
10075 isymend
= isymbuf
+ extsymcount
;
10076 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
10079 Elf_Internal_Versym iver
;
10080 unsigned short version_index
;
10082 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
10083 || isym
->st_shndx
== SHN_UNDEF
)
10086 name
= bfd_elf_string_from_elf_section (input
,
10089 if (strcmp (name
, h
->root
.root
.string
) != 0)
10092 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
10094 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
10095 && !(h
->def_regular
10096 && h
->forced_local
))
10098 /* If we have a non-hidden versioned sym, then it should
10099 have provided a definition for the undefined sym unless
10100 it is defined in a non-shared object and forced local.
10105 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
10106 if (version_index
== 1 || version_index
== 2)
10108 /* This is the base or first version. We can use it. */
10122 /* Convert ELF common symbol TYPE. */
10125 elf_link_convert_common_type (struct bfd_link_info
*info
, int type
)
10127 /* Commom symbol can only appear in relocatable link. */
10128 if (!bfd_link_relocatable (info
))
10130 switch (info
->elf_stt_common
)
10134 case elf_stt_common
:
10137 case no_elf_stt_common
:
10144 /* Add an external symbol to the symbol table. This is called from
10145 the hash table traversal routine. When generating a shared object,
10146 we go through the symbol table twice. The first time we output
10147 anything that might have been forced to local scope in a version
10148 script. The second time we output the symbols that are still
10152 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
10154 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
10155 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
10156 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
10158 Elf_Internal_Sym sym
;
10159 asection
*input_sec
;
10160 const struct elf_backend_data
*bed
;
10165 if (h
->root
.type
== bfd_link_hash_warning
)
10167 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
10168 if (h
->root
.type
== bfd_link_hash_new
)
10172 /* Decide whether to output this symbol in this pass. */
10173 if (eoinfo
->localsyms
)
10175 if (!h
->forced_local
)
10180 if (h
->forced_local
)
10184 bed
= get_elf_backend_data (flinfo
->output_bfd
);
10186 if (h
->root
.type
== bfd_link_hash_undefined
)
10188 /* If we have an undefined symbol reference here then it must have
10189 come from a shared library that is being linked in. (Undefined
10190 references in regular files have already been handled unless
10191 they are in unreferenced sections which are removed by garbage
10193 bfd_boolean ignore_undef
= FALSE
;
10195 /* Some symbols may be special in that the fact that they're
10196 undefined can be safely ignored - let backend determine that. */
10197 if (bed
->elf_backend_ignore_undef_symbol
)
10198 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
10200 /* If we are reporting errors for this situation then do so now. */
10202 && h
->ref_dynamic_nonweak
10203 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
10204 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
10205 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
10207 flinfo
->info
->callbacks
->undefined_symbol
10208 (flinfo
->info
, h
->root
.root
.string
,
10209 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
, NULL
, 0,
10210 flinfo
->info
->unresolved_syms_in_shared_libs
== RM_DIAGNOSE
10211 && !flinfo
->info
->warn_unresolved_syms
);
10214 /* Strip a global symbol defined in a discarded section. */
10219 /* We should also warn if a forced local symbol is referenced from
10220 shared libraries. */
10221 if (bfd_link_executable (flinfo
->info
)
10226 && h
->ref_dynamic_nonweak
10227 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
10231 struct elf_link_hash_entry
*hi
= h
;
10233 /* Check indirect symbol. */
10234 while (hi
->root
.type
== bfd_link_hash_indirect
)
10235 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
10237 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
10238 /* xgettext:c-format */
10239 msg
= _("%pB: internal symbol `%s' in %pB is referenced by DSO");
10240 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
10241 /* xgettext:c-format */
10242 msg
= _("%pB: hidden symbol `%s' in %pB is referenced by DSO");
10244 /* xgettext:c-format */
10245 msg
= _("%pB: local symbol `%s' in %pB is referenced by DSO");
10246 def_bfd
= flinfo
->output_bfd
;
10247 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
10248 def_bfd
= hi
->root
.u
.def
.section
->owner
;
10249 _bfd_error_handler (msg
, flinfo
->output_bfd
,
10250 h
->root
.root
.string
, def_bfd
);
10251 bfd_set_error (bfd_error_bad_value
);
10252 eoinfo
->failed
= TRUE
;
10256 /* We don't want to output symbols that have never been mentioned by
10257 a regular file, or that we have been told to strip. However, if
10258 h->indx is set to -2, the symbol is used by a reloc and we must
10263 else if ((h
->def_dynamic
10265 || h
->root
.type
== bfd_link_hash_new
)
10267 && !h
->ref_regular
)
10269 else if (flinfo
->info
->strip
== strip_all
)
10271 else if (flinfo
->info
->strip
== strip_some
10272 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
10273 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
10275 else if ((h
->root
.type
== bfd_link_hash_defined
10276 || h
->root
.type
== bfd_link_hash_defweak
)
10277 && ((flinfo
->info
->strip_discarded
10278 && discarded_section (h
->root
.u
.def
.section
))
10279 || ((h
->root
.u
.def
.section
->flags
& SEC_LINKER_CREATED
) == 0
10280 && h
->root
.u
.def
.section
->owner
!= NULL
10281 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
10283 else if ((h
->root
.type
== bfd_link_hash_undefined
10284 || h
->root
.type
== bfd_link_hash_undefweak
)
10285 && h
->root
.u
.undef
.abfd
!= NULL
10286 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
10291 /* If we're stripping it, and it's not a dynamic symbol, there's
10292 nothing else to do. However, if it is a forced local symbol or
10293 an ifunc symbol we need to give the backend finish_dynamic_symbol
10294 function a chance to make it dynamic. */
10296 && h
->dynindx
== -1
10297 && type
!= STT_GNU_IFUNC
10298 && !h
->forced_local
)
10302 sym
.st_size
= h
->size
;
10303 sym
.st_other
= h
->other
;
10304 switch (h
->root
.type
)
10307 case bfd_link_hash_new
:
10308 case bfd_link_hash_warning
:
10312 case bfd_link_hash_undefined
:
10313 case bfd_link_hash_undefweak
:
10314 input_sec
= bfd_und_section_ptr
;
10315 sym
.st_shndx
= SHN_UNDEF
;
10318 case bfd_link_hash_defined
:
10319 case bfd_link_hash_defweak
:
10321 input_sec
= h
->root
.u
.def
.section
;
10322 if (input_sec
->output_section
!= NULL
)
10325 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
10326 input_sec
->output_section
);
10327 if (sym
.st_shndx
== SHN_BAD
)
10330 /* xgettext:c-format */
10331 (_("%pB: could not find output section %pA for input section %pA"),
10332 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
10333 bfd_set_error (bfd_error_nonrepresentable_section
);
10334 eoinfo
->failed
= TRUE
;
10338 /* ELF symbols in relocatable files are section relative,
10339 but in nonrelocatable files they are virtual
10341 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
10342 if (!bfd_link_relocatable (flinfo
->info
))
10344 sym
.st_value
+= input_sec
->output_section
->vma
;
10345 if (h
->type
== STT_TLS
)
10347 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
10348 if (tls_sec
!= NULL
)
10349 sym
.st_value
-= tls_sec
->vma
;
10355 BFD_ASSERT (input_sec
->owner
== NULL
10356 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
10357 sym
.st_shndx
= SHN_UNDEF
;
10358 input_sec
= bfd_und_section_ptr
;
10363 case bfd_link_hash_common
:
10364 input_sec
= h
->root
.u
.c
.p
->section
;
10365 sym
.st_shndx
= bed
->common_section_index (input_sec
);
10366 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
10369 case bfd_link_hash_indirect
:
10370 /* These symbols are created by symbol versioning. They point
10371 to the decorated version of the name. For example, if the
10372 symbol foo@@GNU_1.2 is the default, which should be used when
10373 foo is used with no version, then we add an indirect symbol
10374 foo which points to foo@@GNU_1.2. We ignore these symbols,
10375 since the indirected symbol is already in the hash table. */
10379 if (type
== STT_COMMON
|| type
== STT_OBJECT
)
10380 switch (h
->root
.type
)
10382 case bfd_link_hash_common
:
10383 type
= elf_link_convert_common_type (flinfo
->info
, type
);
10385 case bfd_link_hash_defined
:
10386 case bfd_link_hash_defweak
:
10387 if (bed
->common_definition (&sym
))
10388 type
= elf_link_convert_common_type (flinfo
->info
, type
);
10392 case bfd_link_hash_undefined
:
10393 case bfd_link_hash_undefweak
:
10399 if (h
->forced_local
)
10401 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, type
);
10402 /* Turn off visibility on local symbol. */
10403 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
10405 /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */
10406 else if (h
->unique_global
&& h
->def_regular
)
10407 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, type
);
10408 else if (h
->root
.type
== bfd_link_hash_undefweak
10409 || h
->root
.type
== bfd_link_hash_defweak
)
10410 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, type
);
10412 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
10413 sym
.st_target_internal
= h
->target_internal
;
10415 /* Give the processor backend a chance to tweak the symbol value,
10416 and also to finish up anything that needs to be done for this
10417 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
10418 forced local syms when non-shared is due to a historical quirk.
10419 STT_GNU_IFUNC symbol must go through PLT. */
10420 if ((h
->type
== STT_GNU_IFUNC
10422 && !bfd_link_relocatable (flinfo
->info
))
10423 || ((h
->dynindx
!= -1
10424 || h
->forced_local
)
10425 && ((bfd_link_pic (flinfo
->info
)
10426 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
10427 || h
->root
.type
!= bfd_link_hash_undefweak
))
10428 || !h
->forced_local
)
10429 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
10431 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
10432 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
10434 eoinfo
->failed
= TRUE
;
10439 /* If we are marking the symbol as undefined, and there are no
10440 non-weak references to this symbol from a regular object, then
10441 mark the symbol as weak undefined; if there are non-weak
10442 references, mark the symbol as strong. We can't do this earlier,
10443 because it might not be marked as undefined until the
10444 finish_dynamic_symbol routine gets through with it. */
10445 if (sym
.st_shndx
== SHN_UNDEF
10447 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
10448 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
10451 type
= ELF_ST_TYPE (sym
.st_info
);
10453 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
10454 if (type
== STT_GNU_IFUNC
)
10457 if (h
->ref_regular_nonweak
)
10458 bindtype
= STB_GLOBAL
;
10460 bindtype
= STB_WEAK
;
10461 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
10464 /* If this is a symbol defined in a dynamic library, don't use the
10465 symbol size from the dynamic library. Relinking an executable
10466 against a new library may introduce gratuitous changes in the
10467 executable's symbols if we keep the size. */
10468 if (sym
.st_shndx
== SHN_UNDEF
10473 /* If a non-weak symbol with non-default visibility is not defined
10474 locally, it is a fatal error. */
10475 if (!bfd_link_relocatable (flinfo
->info
)
10476 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
10477 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
10478 && h
->root
.type
== bfd_link_hash_undefined
10479 && !h
->def_regular
)
10483 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
10484 /* xgettext:c-format */
10485 msg
= _("%pB: protected symbol `%s' isn't defined");
10486 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
10487 /* xgettext:c-format */
10488 msg
= _("%pB: internal symbol `%s' isn't defined");
10490 /* xgettext:c-format */
10491 msg
= _("%pB: hidden symbol `%s' isn't defined");
10492 _bfd_error_handler (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
10493 bfd_set_error (bfd_error_bad_value
);
10494 eoinfo
->failed
= TRUE
;
10498 /* If this symbol should be put in the .dynsym section, then put it
10499 there now. We already know the symbol index. We also fill in
10500 the entry in the .hash section. */
10501 if (h
->dynindx
!= -1
10502 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
10503 && elf_hash_table (flinfo
->info
)->dynsym
!= NULL
10504 && !discarded_section (elf_hash_table (flinfo
->info
)->dynsym
))
10508 /* Since there is no version information in the dynamic string,
10509 if there is no version info in symbol version section, we will
10510 have a run-time problem if not linking executable, referenced
10511 by shared library, or not bound locally. */
10512 if (h
->verinfo
.verdef
== NULL
10513 && (!bfd_link_executable (flinfo
->info
)
10515 || !h
->def_regular
))
10517 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
10519 if (p
&& p
[1] != '\0')
10522 /* xgettext:c-format */
10523 (_("%pB: no symbol version section for versioned symbol `%s'"),
10524 flinfo
->output_bfd
, h
->root
.root
.string
);
10525 eoinfo
->failed
= TRUE
;
10530 sym
.st_name
= h
->dynstr_index
;
10531 esym
= (elf_hash_table (flinfo
->info
)->dynsym
->contents
10532 + h
->dynindx
* bed
->s
->sizeof_sym
);
10533 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
10535 eoinfo
->failed
= TRUE
;
10539 /* Inform the linker of the addition of this symbol. */
10541 if (flinfo
->info
->callbacks
->ctf_new_dynsym
)
10542 flinfo
->info
->callbacks
->ctf_new_dynsym (h
->dynindx
, &sym
);
10544 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
10546 if (flinfo
->hash_sec
!= NULL
)
10548 size_t hash_entry_size
;
10549 bfd_byte
*bucketpos
;
10551 size_t bucketcount
;
10554 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
10555 bucket
= h
->u
.elf_hash_value
% bucketcount
;
10558 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
10559 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
10560 + (bucket
+ 2) * hash_entry_size
);
10561 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
10562 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
10564 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
10565 ((bfd_byte
*) flinfo
->hash_sec
->contents
10566 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
10569 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
10571 Elf_Internal_Versym iversym
;
10572 Elf_External_Versym
*eversym
;
10574 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
10576 if (h
->verinfo
.verdef
== NULL
10577 || (elf_dyn_lib_class (h
->verinfo
.verdef
->vd_bfd
)
10578 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
| DYN_NO_NEEDED
)))
10579 iversym
.vs_vers
= 1;
10581 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
10585 if (h
->verinfo
.vertree
== NULL
)
10586 iversym
.vs_vers
= 1;
10588 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
10589 if (flinfo
->info
->create_default_symver
)
10593 /* Turn on VERSYM_HIDDEN only if the hidden versioned symbol is
10594 defined locally. */
10595 if (h
->versioned
== versioned_hidden
&& h
->def_regular
)
10596 iversym
.vs_vers
|= VERSYM_HIDDEN
;
10598 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
10599 eversym
+= h
->dynindx
;
10600 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
10604 /* If the symbol is undefined, and we didn't output it to .dynsym,
10605 strip it from .symtab too. Obviously we can't do this for
10606 relocatable output or when needed for --emit-relocs. */
10607 else if (input_sec
== bfd_und_section_ptr
10609 /* PR 22319 Do not strip global undefined symbols marked as being needed. */
10610 && (h
->mark
!= 1 || ELF_ST_BIND (sym
.st_info
) != STB_GLOBAL
)
10611 && !bfd_link_relocatable (flinfo
->info
))
10614 /* Also strip others that we couldn't earlier due to dynamic symbol
10618 if ((input_sec
->flags
& SEC_EXCLUDE
) != 0)
10621 /* Output a FILE symbol so that following locals are not associated
10622 with the wrong input file. We need one for forced local symbols
10623 if we've seen more than one FILE symbol or when we have exactly
10624 one FILE symbol but global symbols are present in a file other
10625 than the one with the FILE symbol. We also need one if linker
10626 defined symbols are present. In practice these conditions are
10627 always met, so just emit the FILE symbol unconditionally. */
10628 if (eoinfo
->localsyms
10629 && !eoinfo
->file_sym_done
10630 && eoinfo
->flinfo
->filesym_count
!= 0)
10632 Elf_Internal_Sym fsym
;
10634 memset (&fsym
, 0, sizeof (fsym
));
10635 fsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10636 fsym
.st_shndx
= SHN_ABS
;
10637 if (!elf_link_output_symstrtab (eoinfo
->flinfo
, NULL
, &fsym
,
10638 bfd_und_section_ptr
, NULL
))
10641 eoinfo
->file_sym_done
= TRUE
;
10644 indx
= bfd_get_symcount (flinfo
->output_bfd
);
10645 ret
= elf_link_output_symstrtab (flinfo
, h
->root
.root
.string
, &sym
,
10649 eoinfo
->failed
= TRUE
;
10654 else if (h
->indx
== -2)
10660 /* Return TRUE if special handling is done for relocs in SEC against
10661 symbols defined in discarded sections. */
10664 elf_section_ignore_discarded_relocs (asection
*sec
)
10666 const struct elf_backend_data
*bed
;
10668 switch (sec
->sec_info_type
)
10670 case SEC_INFO_TYPE_STABS
:
10671 case SEC_INFO_TYPE_EH_FRAME
:
10672 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
10678 bed
= get_elf_backend_data (sec
->owner
);
10679 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
10680 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
10686 /* Return a mask saying how ld should treat relocations in SEC against
10687 symbols defined in discarded sections. If this function returns
10688 COMPLAIN set, ld will issue a warning message. If this function
10689 returns PRETEND set, and the discarded section was link-once and the
10690 same size as the kept link-once section, ld will pretend that the
10691 symbol was actually defined in the kept section. Otherwise ld will
10692 zero the reloc (at least that is the intent, but some cooperation by
10693 the target dependent code is needed, particularly for REL targets). */
10696 _bfd_elf_default_action_discarded (asection
*sec
)
10698 if (sec
->flags
& SEC_DEBUGGING
)
10701 if (strcmp (".eh_frame", sec
->name
) == 0)
10704 if (strcmp (".gcc_except_table", sec
->name
) == 0)
10707 return COMPLAIN
| PRETEND
;
10710 /* Find a match between a section and a member of a section group. */
10713 match_group_member (asection
*sec
, asection
*group
,
10714 struct bfd_link_info
*info
)
10716 asection
*first
= elf_next_in_group (group
);
10717 asection
*s
= first
;
10721 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
10724 s
= elf_next_in_group (s
);
10732 /* Check if the kept section of a discarded section SEC can be used
10733 to replace it. Return the replacement if it is OK. Otherwise return
10737 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
10741 kept
= sec
->kept_section
;
10744 if ((kept
->flags
& SEC_GROUP
) != 0)
10745 kept
= match_group_member (sec
, kept
, info
);
10748 if ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
10749 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
))
10753 /* Get the real kept section. */
10755 for (next
= kept
->kept_section
;
10757 next
= next
->kept_section
)
10761 sec
->kept_section
= kept
;
10766 /* Link an input file into the linker output file. This function
10767 handles all the sections and relocations of the input file at once.
10768 This is so that we only have to read the local symbols once, and
10769 don't have to keep them in memory. */
10772 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
10774 int (*relocate_section
)
10775 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
10776 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
10778 Elf_Internal_Shdr
*symtab_hdr
;
10779 size_t locsymcount
;
10781 Elf_Internal_Sym
*isymbuf
;
10782 Elf_Internal_Sym
*isym
;
10783 Elf_Internal_Sym
*isymend
;
10785 asection
**ppsection
;
10787 const struct elf_backend_data
*bed
;
10788 struct elf_link_hash_entry
**sym_hashes
;
10789 bfd_size_type address_size
;
10790 bfd_vma r_type_mask
;
10792 bfd_boolean have_file_sym
= FALSE
;
10794 output_bfd
= flinfo
->output_bfd
;
10795 bed
= get_elf_backend_data (output_bfd
);
10796 relocate_section
= bed
->elf_backend_relocate_section
;
10798 /* If this is a dynamic object, we don't want to do anything here:
10799 we don't want the local symbols, and we don't want the section
10801 if ((input_bfd
->flags
& DYNAMIC
) != 0)
10804 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
10805 if (elf_bad_symtab (input_bfd
))
10807 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
10812 locsymcount
= symtab_hdr
->sh_info
;
10813 extsymoff
= symtab_hdr
->sh_info
;
10816 /* Enable GNU OSABI features in the output BFD that are used in the input
10818 if (bed
->elf_osabi
== ELFOSABI_NONE
10819 || bed
->elf_osabi
== ELFOSABI_GNU
10820 || bed
->elf_osabi
== ELFOSABI_FREEBSD
)
10821 elf_tdata (output_bfd
)->has_gnu_osabi
10822 |= (elf_tdata (input_bfd
)->has_gnu_osabi
10823 & (bfd_link_relocatable (flinfo
->info
)
10824 ? -1 : ~elf_gnu_osabi_retain
));
10826 /* Read the local symbols. */
10827 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
10828 if (isymbuf
== NULL
&& locsymcount
!= 0)
10830 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
10831 flinfo
->internal_syms
,
10832 flinfo
->external_syms
,
10833 flinfo
->locsym_shndx
);
10834 if (isymbuf
== NULL
)
10838 /* Find local symbol sections and adjust values of symbols in
10839 SEC_MERGE sections. Write out those local symbols we know are
10840 going into the output file. */
10841 isymend
= isymbuf
+ locsymcount
;
10842 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
10844 isym
++, pindex
++, ppsection
++)
10848 Elf_Internal_Sym osym
;
10854 if (elf_bad_symtab (input_bfd
))
10856 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
10863 if (isym
->st_shndx
== SHN_UNDEF
)
10864 isec
= bfd_und_section_ptr
;
10865 else if (isym
->st_shndx
== SHN_ABS
)
10866 isec
= bfd_abs_section_ptr
;
10867 else if (isym
->st_shndx
== SHN_COMMON
)
10868 isec
= bfd_com_section_ptr
;
10871 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
10874 /* Don't attempt to output symbols with st_shnx in the
10875 reserved range other than SHN_ABS and SHN_COMMON. */
10876 isec
= bfd_und_section_ptr
;
10878 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
10879 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
10881 _bfd_merged_section_offset (output_bfd
, &isec
,
10882 elf_section_data (isec
)->sec_info
,
10888 /* Don't output the first, undefined, symbol. In fact, don't
10889 output any undefined local symbol. */
10890 if (isec
== bfd_und_section_ptr
)
10893 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
10895 /* We never output section symbols. Instead, we use the
10896 section symbol of the corresponding section in the output
10901 /* If we are stripping all symbols, we don't want to output this
10903 if (flinfo
->info
->strip
== strip_all
)
10906 /* If we are discarding all local symbols, we don't want to
10907 output this one. If we are generating a relocatable output
10908 file, then some of the local symbols may be required by
10909 relocs; we output them below as we discover that they are
10911 if (flinfo
->info
->discard
== discard_all
)
10914 /* If this symbol is defined in a section which we are
10915 discarding, we don't need to keep it. */
10916 if (isym
->st_shndx
!= SHN_UNDEF
10917 && isym
->st_shndx
< SHN_LORESERVE
10918 && isec
->output_section
== NULL
10919 && flinfo
->info
->non_contiguous_regions
10920 && flinfo
->info
->non_contiguous_regions_warnings
)
10922 _bfd_error_handler (_("warning: --enable-non-contiguous-regions "
10923 "discards section `%s' from '%s'\n"),
10924 isec
->name
, bfd_get_filename (isec
->owner
));
10928 if (isym
->st_shndx
!= SHN_UNDEF
10929 && isym
->st_shndx
< SHN_LORESERVE
10930 && bfd_section_removed_from_list (output_bfd
,
10931 isec
->output_section
))
10934 /* Get the name of the symbol. */
10935 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
10940 /* See if we are discarding symbols with this name. */
10941 if ((flinfo
->info
->strip
== strip_some
10942 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
10944 || (((flinfo
->info
->discard
== discard_sec_merge
10945 && (isec
->flags
& SEC_MERGE
)
10946 && !bfd_link_relocatable (flinfo
->info
))
10947 || flinfo
->info
->discard
== discard_l
)
10948 && bfd_is_local_label_name (input_bfd
, name
)))
10951 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
10953 if (input_bfd
->lto_output
)
10954 /* -flto puts a temp file name here. This means builds
10955 are not reproducible. Discard the symbol. */
10957 have_file_sym
= TRUE
;
10958 flinfo
->filesym_count
+= 1;
10960 if (!have_file_sym
)
10962 /* In the absence of debug info, bfd_find_nearest_line uses
10963 FILE symbols to determine the source file for local
10964 function symbols. Provide a FILE symbol here if input
10965 files lack such, so that their symbols won't be
10966 associated with a previous input file. It's not the
10967 source file, but the best we can do. */
10968 const char *filename
;
10969 have_file_sym
= TRUE
;
10970 flinfo
->filesym_count
+= 1;
10971 memset (&osym
, 0, sizeof (osym
));
10972 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10973 osym
.st_shndx
= SHN_ABS
;
10974 if (input_bfd
->lto_output
)
10977 filename
= lbasename (bfd_get_filename (input_bfd
));
10978 if (!elf_link_output_symstrtab (flinfo
, filename
, &osym
,
10979 bfd_abs_section_ptr
, NULL
))
10985 /* Adjust the section index for the output file. */
10986 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
10987 isec
->output_section
);
10988 if (osym
.st_shndx
== SHN_BAD
)
10991 /* ELF symbols in relocatable files are section relative, but
10992 in executable files they are virtual addresses. Note that
10993 this code assumes that all ELF sections have an associated
10994 BFD section with a reasonable value for output_offset; below
10995 we assume that they also have a reasonable value for
10996 output_section. Any special sections must be set up to meet
10997 these requirements. */
10998 osym
.st_value
+= isec
->output_offset
;
10999 if (!bfd_link_relocatable (flinfo
->info
))
11001 osym
.st_value
+= isec
->output_section
->vma
;
11002 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
11004 /* STT_TLS symbols are relative to PT_TLS segment base. */
11005 if (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
)
11006 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
11008 osym
.st_info
= ELF_ST_INFO (ELF_ST_BIND (osym
.st_info
),
11013 indx
= bfd_get_symcount (output_bfd
);
11014 ret
= elf_link_output_symstrtab (flinfo
, name
, &osym
, isec
, NULL
);
11021 if (bed
->s
->arch_size
== 32)
11023 r_type_mask
= 0xff;
11029 r_type_mask
= 0xffffffff;
11034 /* Relocate the contents of each section. */
11035 sym_hashes
= elf_sym_hashes (input_bfd
);
11036 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
11038 bfd_byte
*contents
;
11040 if (! o
->linker_mark
)
11042 /* This section was omitted from the link. */
11046 if (!flinfo
->info
->resolve_section_groups
11047 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
11049 /* Deal with the group signature symbol. */
11050 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
11051 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
11052 asection
*osec
= o
->output_section
;
11054 BFD_ASSERT (bfd_link_relocatable (flinfo
->info
));
11055 if (symndx
>= locsymcount
11056 || (elf_bad_symtab (input_bfd
)
11057 && flinfo
->sections
[symndx
] == NULL
))
11059 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
11060 while (h
->root
.type
== bfd_link_hash_indirect
11061 || h
->root
.type
== bfd_link_hash_warning
)
11062 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11063 /* Arrange for symbol to be output. */
11065 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
11067 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
11069 /* We'll use the output section target_index. */
11070 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
11071 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
11075 if (flinfo
->indices
[symndx
] == -1)
11077 /* Otherwise output the local symbol now. */
11078 Elf_Internal_Sym sym
= isymbuf
[symndx
];
11079 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
11084 name
= bfd_elf_string_from_elf_section (input_bfd
,
11085 symtab_hdr
->sh_link
,
11090 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
11092 if (sym
.st_shndx
== SHN_BAD
)
11095 sym
.st_value
+= o
->output_offset
;
11097 indx
= bfd_get_symcount (output_bfd
);
11098 ret
= elf_link_output_symstrtab (flinfo
, name
, &sym
, o
,
11103 flinfo
->indices
[symndx
] = indx
;
11107 elf_section_data (osec
)->this_hdr
.sh_info
11108 = flinfo
->indices
[symndx
];
11112 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
11113 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
11116 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
11118 /* Section was created by _bfd_elf_link_create_dynamic_sections
11123 /* Get the contents of the section. They have been cached by a
11124 relaxation routine. Note that o is a section in an input
11125 file, so the contents field will not have been set by any of
11126 the routines which work on output files. */
11127 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
11129 contents
= elf_section_data (o
)->this_hdr
.contents
;
11130 if (bed
->caches_rawsize
11132 && o
->rawsize
< o
->size
)
11134 memcpy (flinfo
->contents
, contents
, o
->rawsize
);
11135 contents
= flinfo
->contents
;
11140 contents
= flinfo
->contents
;
11141 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
11145 if ((o
->flags
& SEC_RELOC
) != 0)
11147 Elf_Internal_Rela
*internal_relocs
;
11148 Elf_Internal_Rela
*rel
, *relend
;
11149 int action_discarded
;
11152 /* Get the swapped relocs. */
11154 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
11155 flinfo
->internal_relocs
, FALSE
);
11156 if (internal_relocs
== NULL
11157 && o
->reloc_count
> 0)
11160 /* We need to reverse-copy input .ctors/.dtors sections if
11161 they are placed in .init_array/.finit_array for output. */
11162 if (o
->size
> address_size
11163 && ((strncmp (o
->name
, ".ctors", 6) == 0
11164 && strcmp (o
->output_section
->name
,
11165 ".init_array") == 0)
11166 || (strncmp (o
->name
, ".dtors", 6) == 0
11167 && strcmp (o
->output_section
->name
,
11168 ".fini_array") == 0))
11169 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
11171 if (o
->size
* bed
->s
->int_rels_per_ext_rel
11172 != o
->reloc_count
* address_size
)
11175 /* xgettext:c-format */
11176 (_("error: %pB: size of section %pA is not "
11177 "multiple of address size"),
11179 bfd_set_error (bfd_error_bad_value
);
11182 o
->flags
|= SEC_ELF_REVERSE_COPY
;
11185 action_discarded
= -1;
11186 if (!elf_section_ignore_discarded_relocs (o
))
11187 action_discarded
= (*bed
->action_discarded
) (o
);
11189 /* Run through the relocs evaluating complex reloc symbols and
11190 looking for relocs against symbols from discarded sections
11191 or section symbols from removed link-once sections.
11192 Complain about relocs against discarded sections. Zero
11193 relocs against removed link-once sections. */
11195 rel
= internal_relocs
;
11196 relend
= rel
+ o
->reloc_count
;
11197 for ( ; rel
< relend
; rel
++)
11199 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
11200 unsigned int s_type
;
11201 asection
**ps
, *sec
;
11202 struct elf_link_hash_entry
*h
= NULL
;
11203 const char *sym_name
;
11205 if (r_symndx
== STN_UNDEF
)
11208 if (r_symndx
>= locsymcount
11209 || (elf_bad_symtab (input_bfd
)
11210 && flinfo
->sections
[r_symndx
] == NULL
))
11212 h
= sym_hashes
[r_symndx
- extsymoff
];
11214 /* Badly formatted input files can contain relocs that
11215 reference non-existant symbols. Check here so that
11216 we do not seg fault. */
11220 /* xgettext:c-format */
11221 (_("error: %pB contains a reloc (%#" PRIx64
") for section %pA "
11222 "that references a non-existent global symbol"),
11223 input_bfd
, (uint64_t) rel
->r_info
, o
);
11224 bfd_set_error (bfd_error_bad_value
);
11228 while (h
->root
.type
== bfd_link_hash_indirect
11229 || h
->root
.type
== bfd_link_hash_warning
)
11230 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11234 /* If a plugin symbol is referenced from a non-IR file,
11235 mark the symbol as undefined. Note that the
11236 linker may attach linker created dynamic sections
11237 to the plugin bfd. Symbols defined in linker
11238 created sections are not plugin symbols. */
11239 if ((h
->root
.non_ir_ref_regular
11240 || h
->root
.non_ir_ref_dynamic
)
11241 && (h
->root
.type
== bfd_link_hash_defined
11242 || h
->root
.type
== bfd_link_hash_defweak
)
11243 && (h
->root
.u
.def
.section
->flags
11244 & SEC_LINKER_CREATED
) == 0
11245 && h
->root
.u
.def
.section
->owner
!= NULL
11246 && (h
->root
.u
.def
.section
->owner
->flags
11247 & BFD_PLUGIN
) != 0)
11249 h
->root
.type
= bfd_link_hash_undefined
;
11250 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
11254 if (h
->root
.type
== bfd_link_hash_defined
11255 || h
->root
.type
== bfd_link_hash_defweak
)
11256 ps
= &h
->root
.u
.def
.section
;
11258 sym_name
= h
->root
.root
.string
;
11262 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
11264 s_type
= ELF_ST_TYPE (sym
->st_info
);
11265 ps
= &flinfo
->sections
[r_symndx
];
11266 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
11270 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
11271 && !bfd_link_relocatable (flinfo
->info
))
11274 bfd_vma dot
= (rel
->r_offset
11275 + o
->output_offset
+ o
->output_section
->vma
);
11277 printf ("Encountered a complex symbol!");
11278 printf (" (input_bfd %s, section %s, reloc %ld\n",
11279 bfd_get_filename (input_bfd
), o
->name
,
11280 (long) (rel
- internal_relocs
));
11281 printf (" symbol: idx %8.8lx, name %s\n",
11282 r_symndx
, sym_name
);
11283 printf (" reloc : info %8.8lx, addr %8.8lx\n",
11284 (unsigned long) rel
->r_info
,
11285 (unsigned long) rel
->r_offset
);
11287 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
11288 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
11291 /* Symbol evaluated OK. Update to absolute value. */
11292 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
11297 if (action_discarded
!= -1 && ps
!= NULL
)
11299 /* Complain if the definition comes from a
11300 discarded section. */
11301 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
11303 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
11304 if (action_discarded
& COMPLAIN
)
11305 (*flinfo
->info
->callbacks
->einfo
)
11306 /* xgettext:c-format */
11307 (_("%X`%s' referenced in section `%pA' of %pB: "
11308 "defined in discarded section `%pA' of %pB\n"),
11309 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
11311 /* Try to do the best we can to support buggy old
11312 versions of gcc. Pretend that the symbol is
11313 really defined in the kept linkonce section.
11314 FIXME: This is quite broken. Modifying the
11315 symbol here means we will be changing all later
11316 uses of the symbol, not just in this section. */
11317 if (action_discarded
& PRETEND
)
11321 kept
= _bfd_elf_check_kept_section (sec
,
11333 /* Relocate the section by invoking a back end routine.
11335 The back end routine is responsible for adjusting the
11336 section contents as necessary, and (if using Rela relocs
11337 and generating a relocatable output file) adjusting the
11338 reloc addend as necessary.
11340 The back end routine does not have to worry about setting
11341 the reloc address or the reloc symbol index.
11343 The back end routine is given a pointer to the swapped in
11344 internal symbols, and can access the hash table entries
11345 for the external symbols via elf_sym_hashes (input_bfd).
11347 When generating relocatable output, the back end routine
11348 must handle STB_LOCAL/STT_SECTION symbols specially. The
11349 output symbol is going to be a section symbol
11350 corresponding to the output section, which will require
11351 the addend to be adjusted. */
11353 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
11354 input_bfd
, o
, contents
,
11362 || bfd_link_relocatable (flinfo
->info
)
11363 || flinfo
->info
->emitrelocations
)
11365 Elf_Internal_Rela
*irela
;
11366 Elf_Internal_Rela
*irelaend
, *irelamid
;
11367 bfd_vma last_offset
;
11368 struct elf_link_hash_entry
**rel_hash
;
11369 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
11370 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
11371 unsigned int next_erel
;
11372 bfd_boolean rela_normal
;
11373 struct bfd_elf_section_data
*esdi
, *esdo
;
11375 esdi
= elf_section_data (o
);
11376 esdo
= elf_section_data (o
->output_section
);
11377 rela_normal
= FALSE
;
11379 /* Adjust the reloc addresses and symbol indices. */
11381 irela
= internal_relocs
;
11382 irelaend
= irela
+ o
->reloc_count
;
11383 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
11384 /* We start processing the REL relocs, if any. When we reach
11385 IRELAMID in the loop, we switch to the RELA relocs. */
11387 if (esdi
->rel
.hdr
!= NULL
)
11388 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
11389 * bed
->s
->int_rels_per_ext_rel
);
11390 rel_hash_list
= rel_hash
;
11391 rela_hash_list
= NULL
;
11392 last_offset
= o
->output_offset
;
11393 if (!bfd_link_relocatable (flinfo
->info
))
11394 last_offset
+= o
->output_section
->vma
;
11395 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
11397 unsigned long r_symndx
;
11399 Elf_Internal_Sym sym
;
11401 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
11407 if (irela
== irelamid
)
11409 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
11410 rela_hash_list
= rel_hash
;
11411 rela_normal
= bed
->rela_normal
;
11414 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
11417 if (irela
->r_offset
>= (bfd_vma
) -2)
11419 /* This is a reloc for a deleted entry or somesuch.
11420 Turn it into an R_*_NONE reloc, at the same
11421 offset as the last reloc. elf_eh_frame.c and
11422 bfd_elf_discard_info rely on reloc offsets
11424 irela
->r_offset
= last_offset
;
11426 irela
->r_addend
= 0;
11430 irela
->r_offset
+= o
->output_offset
;
11432 /* Relocs in an executable have to be virtual addresses. */
11433 if (!bfd_link_relocatable (flinfo
->info
))
11434 irela
->r_offset
+= o
->output_section
->vma
;
11436 last_offset
= irela
->r_offset
;
11438 r_symndx
= irela
->r_info
>> r_sym_shift
;
11439 if (r_symndx
== STN_UNDEF
)
11442 if (r_symndx
>= locsymcount
11443 || (elf_bad_symtab (input_bfd
)
11444 && flinfo
->sections
[r_symndx
] == NULL
))
11446 struct elf_link_hash_entry
*rh
;
11447 unsigned long indx
;
11449 /* This is a reloc against a global symbol. We
11450 have not yet output all the local symbols, so
11451 we do not know the symbol index of any global
11452 symbol. We set the rel_hash entry for this
11453 reloc to point to the global hash table entry
11454 for this symbol. The symbol index is then
11455 set at the end of bfd_elf_final_link. */
11456 indx
= r_symndx
- extsymoff
;
11457 rh
= elf_sym_hashes (input_bfd
)[indx
];
11458 while (rh
->root
.type
== bfd_link_hash_indirect
11459 || rh
->root
.type
== bfd_link_hash_warning
)
11460 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
11462 /* Setting the index to -2 tells
11463 elf_link_output_extsym that this symbol is
11464 used by a reloc. */
11465 BFD_ASSERT (rh
->indx
< 0);
11472 /* This is a reloc against a local symbol. */
11475 sym
= isymbuf
[r_symndx
];
11476 sec
= flinfo
->sections
[r_symndx
];
11477 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
11479 /* I suppose the backend ought to fill in the
11480 section of any STT_SECTION symbol against a
11481 processor specific section. */
11482 r_symndx
= STN_UNDEF
;
11483 if (bfd_is_abs_section (sec
))
11485 else if (sec
== NULL
|| sec
->owner
== NULL
)
11487 bfd_set_error (bfd_error_bad_value
);
11492 asection
*osec
= sec
->output_section
;
11494 /* If we have discarded a section, the output
11495 section will be the absolute section. In
11496 case of discarded SEC_MERGE sections, use
11497 the kept section. relocate_section should
11498 have already handled discarded linkonce
11500 if (bfd_is_abs_section (osec
)
11501 && sec
->kept_section
!= NULL
11502 && sec
->kept_section
->output_section
!= NULL
)
11504 osec
= sec
->kept_section
->output_section
;
11505 irela
->r_addend
-= osec
->vma
;
11508 if (!bfd_is_abs_section (osec
))
11510 r_symndx
= osec
->target_index
;
11511 if (r_symndx
== STN_UNDEF
)
11513 irela
->r_addend
+= osec
->vma
;
11514 osec
= _bfd_nearby_section (output_bfd
, osec
,
11516 irela
->r_addend
-= osec
->vma
;
11517 r_symndx
= osec
->target_index
;
11522 /* Adjust the addend according to where the
11523 section winds up in the output section. */
11525 irela
->r_addend
+= sec
->output_offset
;
11529 if (flinfo
->indices
[r_symndx
] == -1)
11531 unsigned long shlink
;
11536 if (flinfo
->info
->strip
== strip_all
)
11538 /* You can't do ld -r -s. */
11539 bfd_set_error (bfd_error_invalid_operation
);
11543 /* This symbol was skipped earlier, but
11544 since it is needed by a reloc, we
11545 must output it now. */
11546 shlink
= symtab_hdr
->sh_link
;
11547 name
= (bfd_elf_string_from_elf_section
11548 (input_bfd
, shlink
, sym
.st_name
));
11552 osec
= sec
->output_section
;
11554 _bfd_elf_section_from_bfd_section (output_bfd
,
11556 if (sym
.st_shndx
== SHN_BAD
)
11559 sym
.st_value
+= sec
->output_offset
;
11560 if (!bfd_link_relocatable (flinfo
->info
))
11562 sym
.st_value
+= osec
->vma
;
11563 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
11565 struct elf_link_hash_table
*htab
11566 = elf_hash_table (flinfo
->info
);
11568 /* STT_TLS symbols are relative to PT_TLS
11570 if (htab
->tls_sec
!= NULL
)
11571 sym
.st_value
-= htab
->tls_sec
->vma
;
11574 = ELF_ST_INFO (ELF_ST_BIND (sym
.st_info
),
11579 indx
= bfd_get_symcount (output_bfd
);
11580 ret
= elf_link_output_symstrtab (flinfo
, name
,
11586 flinfo
->indices
[r_symndx
] = indx
;
11591 r_symndx
= flinfo
->indices
[r_symndx
];
11594 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
11595 | (irela
->r_info
& r_type_mask
));
11598 /* Swap out the relocs. */
11599 input_rel_hdr
= esdi
->rel
.hdr
;
11600 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
11602 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
11607 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
11608 * bed
->s
->int_rels_per_ext_rel
);
11609 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
11612 input_rela_hdr
= esdi
->rela
.hdr
;
11613 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
11615 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
11624 /* Write out the modified section contents. */
11625 if (bed
->elf_backend_write_section
11626 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
11629 /* Section written out. */
11631 else switch (o
->sec_info_type
)
11633 case SEC_INFO_TYPE_STABS
:
11634 if (! (_bfd_write_section_stabs
11636 &elf_hash_table (flinfo
->info
)->stab_info
,
11637 o
, &elf_section_data (o
)->sec_info
, contents
)))
11640 case SEC_INFO_TYPE_MERGE
:
11641 if (! _bfd_write_merged_section (output_bfd
, o
,
11642 elf_section_data (o
)->sec_info
))
11645 case SEC_INFO_TYPE_EH_FRAME
:
11647 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
11652 case SEC_INFO_TYPE_EH_FRAME_ENTRY
:
11654 if (! _bfd_elf_write_section_eh_frame_entry (output_bfd
,
11662 if (! (o
->flags
& SEC_EXCLUDE
))
11664 file_ptr offset
= (file_ptr
) o
->output_offset
;
11665 bfd_size_type todo
= o
->size
;
11667 offset
*= bfd_octets_per_byte (output_bfd
, o
);
11669 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
11671 /* Reverse-copy input section to output. */
11674 todo
-= address_size
;
11675 if (! bfd_set_section_contents (output_bfd
,
11683 offset
+= address_size
;
11687 else if (! bfd_set_section_contents (output_bfd
,
11701 /* Generate a reloc when linking an ELF file. This is a reloc
11702 requested by the linker, and does not come from any input file. This
11703 is used to build constructor and destructor tables when linking
11707 elf_reloc_link_order (bfd
*output_bfd
,
11708 struct bfd_link_info
*info
,
11709 asection
*output_section
,
11710 struct bfd_link_order
*link_order
)
11712 reloc_howto_type
*howto
;
11716 struct bfd_elf_section_reloc_data
*reldata
;
11717 struct elf_link_hash_entry
**rel_hash_ptr
;
11718 Elf_Internal_Shdr
*rel_hdr
;
11719 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
11720 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
11723 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
11725 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
11728 bfd_set_error (bfd_error_bad_value
);
11732 addend
= link_order
->u
.reloc
.p
->addend
;
11735 reldata
= &esdo
->rel
;
11736 else if (esdo
->rela
.hdr
)
11737 reldata
= &esdo
->rela
;
11744 /* Figure out the symbol index. */
11745 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
11746 if (link_order
->type
== bfd_section_reloc_link_order
)
11748 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
11749 BFD_ASSERT (indx
!= 0);
11750 *rel_hash_ptr
= NULL
;
11754 struct elf_link_hash_entry
*h
;
11756 /* Treat a reloc against a defined symbol as though it were
11757 actually against the section. */
11758 h
= ((struct elf_link_hash_entry
*)
11759 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
11760 link_order
->u
.reloc
.p
->u
.name
,
11761 FALSE
, FALSE
, TRUE
));
11763 && (h
->root
.type
== bfd_link_hash_defined
11764 || h
->root
.type
== bfd_link_hash_defweak
))
11768 section
= h
->root
.u
.def
.section
;
11769 indx
= section
->output_section
->target_index
;
11770 *rel_hash_ptr
= NULL
;
11771 /* It seems that we ought to add the symbol value to the
11772 addend here, but in practice it has already been added
11773 because it was passed to constructor_callback. */
11774 addend
+= section
->output_section
->vma
+ section
->output_offset
;
11776 else if (h
!= NULL
)
11778 /* Setting the index to -2 tells elf_link_output_extsym that
11779 this symbol is used by a reloc. */
11786 (*info
->callbacks
->unattached_reloc
)
11787 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0);
11792 /* If this is an inplace reloc, we must write the addend into the
11794 if (howto
->partial_inplace
&& addend
!= 0)
11796 bfd_size_type size
;
11797 bfd_reloc_status_type rstat
;
11800 const char *sym_name
;
11801 bfd_size_type octets
;
11803 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
11804 buf
= (bfd_byte
*) bfd_zmalloc (size
);
11805 if (buf
== NULL
&& size
!= 0)
11807 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
11814 case bfd_reloc_outofrange
:
11817 case bfd_reloc_overflow
:
11818 if (link_order
->type
== bfd_section_reloc_link_order
)
11819 sym_name
= bfd_section_name (link_order
->u
.reloc
.p
->u
.section
);
11821 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
11822 (*info
->callbacks
->reloc_overflow
) (info
, NULL
, sym_name
,
11823 howto
->name
, addend
, NULL
, NULL
,
11828 octets
= link_order
->offset
* bfd_octets_per_byte (output_bfd
,
11830 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
11837 /* The address of a reloc is relative to the section in a
11838 relocatable file, and is a virtual address in an executable
11840 offset
= link_order
->offset
;
11841 if (! bfd_link_relocatable (info
))
11842 offset
+= output_section
->vma
;
11844 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
11846 irel
[i
].r_offset
= offset
;
11847 irel
[i
].r_info
= 0;
11848 irel
[i
].r_addend
= 0;
11850 if (bed
->s
->arch_size
== 32)
11851 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
11853 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
11855 rel_hdr
= reldata
->hdr
;
11856 erel
= rel_hdr
->contents
;
11857 if (rel_hdr
->sh_type
== SHT_REL
)
11859 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
11860 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
11864 irel
[0].r_addend
= addend
;
11865 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
11866 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
11874 /* Generate an import library in INFO->implib_bfd from symbols in ABFD.
11875 Returns TRUE upon success, FALSE otherwise. */
11878 elf_output_implib (bfd
*abfd
, struct bfd_link_info
*info
)
11880 bfd_boolean ret
= FALSE
;
11882 const struct elf_backend_data
*bed
;
11884 enum bfd_architecture arch
;
11886 asymbol
**sympp
= NULL
;
11890 elf_symbol_type
*osymbuf
;
11893 implib_bfd
= info
->out_implib_bfd
;
11894 bed
= get_elf_backend_data (abfd
);
11896 if (!bfd_set_format (implib_bfd
, bfd_object
))
11899 /* Use flag from executable but make it a relocatable object. */
11900 flags
= bfd_get_file_flags (abfd
);
11901 flags
&= ~HAS_RELOC
;
11902 if (!bfd_set_start_address (implib_bfd
, 0)
11903 || !bfd_set_file_flags (implib_bfd
, flags
& ~EXEC_P
))
11906 /* Copy architecture of output file to import library file. */
11907 arch
= bfd_get_arch (abfd
);
11908 mach
= bfd_get_mach (abfd
);
11909 if (!bfd_set_arch_mach (implib_bfd
, arch
, mach
)
11910 && (abfd
->target_defaulted
11911 || bfd_get_arch (abfd
) != bfd_get_arch (implib_bfd
)))
11914 /* Get symbol table size. */
11915 symsize
= bfd_get_symtab_upper_bound (abfd
);
11919 /* Read in the symbol table. */
11920 sympp
= (asymbol
**) bfd_malloc (symsize
);
11924 symcount
= bfd_canonicalize_symtab (abfd
, sympp
);
11928 /* Allow the BFD backend to copy any private header data it
11929 understands from the output BFD to the import library BFD. */
11930 if (! bfd_copy_private_header_data (abfd
, implib_bfd
))
11933 /* Filter symbols to appear in the import library. */
11934 if (bed
->elf_backend_filter_implib_symbols
)
11935 symcount
= bed
->elf_backend_filter_implib_symbols (abfd
, info
, sympp
,
11938 symcount
= _bfd_elf_filter_global_symbols (abfd
, info
, sympp
, symcount
);
11941 bfd_set_error (bfd_error_no_symbols
);
11942 _bfd_error_handler (_("%pB: no symbol found for import library"),
11948 /* Make symbols absolute. */
11949 amt
= symcount
* sizeof (*osymbuf
);
11950 osymbuf
= (elf_symbol_type
*) bfd_alloc (implib_bfd
, amt
);
11951 if (osymbuf
== NULL
)
11954 for (src_count
= 0; src_count
< symcount
; src_count
++)
11956 memcpy (&osymbuf
[src_count
], (elf_symbol_type
*) sympp
[src_count
],
11957 sizeof (*osymbuf
));
11958 osymbuf
[src_count
].symbol
.section
= bfd_abs_section_ptr
;
11959 osymbuf
[src_count
].internal_elf_sym
.st_shndx
= SHN_ABS
;
11960 osymbuf
[src_count
].symbol
.value
+= sympp
[src_count
]->section
->vma
;
11961 osymbuf
[src_count
].internal_elf_sym
.st_value
=
11962 osymbuf
[src_count
].symbol
.value
;
11963 sympp
[src_count
] = &osymbuf
[src_count
].symbol
;
11966 bfd_set_symtab (implib_bfd
, sympp
, symcount
);
11968 /* Allow the BFD backend to copy any private data it understands
11969 from the output BFD to the import library BFD. This is done last
11970 to permit the routine to look at the filtered symbol table. */
11971 if (! bfd_copy_private_bfd_data (abfd
, implib_bfd
))
11974 if (!bfd_close (implib_bfd
))
11985 elf_final_link_free (bfd
*obfd
, struct elf_final_link_info
*flinfo
)
11989 if (flinfo
->symstrtab
!= NULL
)
11990 _bfd_elf_strtab_free (flinfo
->symstrtab
);
11991 free (flinfo
->contents
);
11992 free (flinfo
->external_relocs
);
11993 free (flinfo
->internal_relocs
);
11994 free (flinfo
->external_syms
);
11995 free (flinfo
->locsym_shndx
);
11996 free (flinfo
->internal_syms
);
11997 free (flinfo
->indices
);
11998 free (flinfo
->sections
);
11999 if (flinfo
->symshndxbuf
!= (Elf_External_Sym_Shndx
*) -1)
12000 free (flinfo
->symshndxbuf
);
12001 for (o
= obfd
->sections
; o
!= NULL
; o
= o
->next
)
12003 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
12004 free (esdo
->rel
.hashes
);
12005 free (esdo
->rela
.hashes
);
12009 /* Do the final step of an ELF link. */
12012 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
12014 bfd_boolean dynamic
;
12015 bfd_boolean emit_relocs
;
12017 struct elf_final_link_info flinfo
;
12019 struct bfd_link_order
*p
;
12021 bfd_size_type max_contents_size
;
12022 bfd_size_type max_external_reloc_size
;
12023 bfd_size_type max_internal_reloc_count
;
12024 bfd_size_type max_sym_count
;
12025 bfd_size_type max_sym_shndx_count
;
12026 Elf_Internal_Sym elfsym
;
12028 Elf_Internal_Shdr
*symtab_hdr
;
12029 Elf_Internal_Shdr
*symtab_shndx_hdr
;
12030 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12031 struct elf_outext_info eoinfo
;
12032 bfd_boolean merged
;
12033 size_t relativecount
= 0;
12034 asection
*reldyn
= 0;
12036 asection
*attr_section
= NULL
;
12037 bfd_vma attr_size
= 0;
12038 const char *std_attrs_section
;
12039 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
12040 bfd_boolean sections_removed
;
12043 if (!is_elf_hash_table (htab
))
12046 if (bfd_link_pic (info
))
12047 abfd
->flags
|= DYNAMIC
;
12049 dynamic
= htab
->dynamic_sections_created
;
12050 dynobj
= htab
->dynobj
;
12052 emit_relocs
= (bfd_link_relocatable (info
)
12053 || info
->emitrelocations
);
12055 memset (&flinfo
, 0, sizeof (flinfo
));
12056 flinfo
.info
= info
;
12057 flinfo
.output_bfd
= abfd
;
12058 flinfo
.symstrtab
= _bfd_elf_strtab_init ();
12059 if (flinfo
.symstrtab
== NULL
)
12064 flinfo
.hash_sec
= NULL
;
12065 flinfo
.symver_sec
= NULL
;
12069 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
12070 /* Note that dynsym_sec can be NULL (on VMS). */
12071 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
12072 /* Note that it is OK if symver_sec is NULL. */
12075 if (info
->unique_symbol
12076 && !bfd_hash_table_init (&flinfo
.local_hash_table
,
12077 local_hash_newfunc
,
12078 sizeof (struct local_hash_entry
)))
12081 /* The object attributes have been merged. Remove the input
12082 sections from the link, and set the contents of the output
12084 sections_removed
= FALSE
;
12085 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
12086 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12088 bfd_boolean remove_section
= FALSE
;
12090 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
12091 || strcmp (o
->name
, ".gnu.attributes") == 0)
12093 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
12095 asection
*input_section
;
12097 if (p
->type
!= bfd_indirect_link_order
)
12099 input_section
= p
->u
.indirect
.section
;
12100 /* Hack: reset the SEC_HAS_CONTENTS flag so that
12101 elf_link_input_bfd ignores this section. */
12102 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
12105 attr_size
= bfd_elf_obj_attr_size (abfd
);
12106 bfd_set_section_size (o
, attr_size
);
12107 /* Skip this section later on. */
12108 o
->map_head
.link_order
= NULL
;
12112 remove_section
= TRUE
;
12114 else if ((o
->flags
& SEC_GROUP
) != 0 && o
->size
== 0)
12116 /* Remove empty group section from linker output. */
12117 remove_section
= TRUE
;
12119 if (remove_section
)
12121 o
->flags
|= SEC_EXCLUDE
;
12122 bfd_section_list_remove (abfd
, o
);
12123 abfd
->section_count
--;
12124 sections_removed
= TRUE
;
12127 if (sections_removed
)
12128 _bfd_fix_excluded_sec_syms (abfd
, info
);
12130 /* Count up the number of relocations we will output for each output
12131 section, so that we know the sizes of the reloc sections. We
12132 also figure out some maximum sizes. */
12133 max_contents_size
= 0;
12134 max_external_reloc_size
= 0;
12135 max_internal_reloc_count
= 0;
12137 max_sym_shndx_count
= 0;
12139 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12141 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
12142 o
->reloc_count
= 0;
12144 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
12146 unsigned int reloc_count
= 0;
12147 unsigned int additional_reloc_count
= 0;
12148 struct bfd_elf_section_data
*esdi
= NULL
;
12150 if (p
->type
== bfd_section_reloc_link_order
12151 || p
->type
== bfd_symbol_reloc_link_order
)
12153 else if (p
->type
== bfd_indirect_link_order
)
12157 sec
= p
->u
.indirect
.section
;
12159 /* Mark all sections which are to be included in the
12160 link. This will normally be every section. We need
12161 to do this so that we can identify any sections which
12162 the linker has decided to not include. */
12163 sec
->linker_mark
= TRUE
;
12165 if (sec
->flags
& SEC_MERGE
)
12168 if (sec
->rawsize
> max_contents_size
)
12169 max_contents_size
= sec
->rawsize
;
12170 if (sec
->size
> max_contents_size
)
12171 max_contents_size
= sec
->size
;
12173 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
12174 && (sec
->owner
->flags
& DYNAMIC
) == 0)
12178 /* We are interested in just local symbols, not all
12180 if (elf_bad_symtab (sec
->owner
))
12181 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
12182 / bed
->s
->sizeof_sym
);
12184 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
12186 if (sym_count
> max_sym_count
)
12187 max_sym_count
= sym_count
;
12189 if (sym_count
> max_sym_shndx_count
12190 && elf_symtab_shndx_list (sec
->owner
) != NULL
)
12191 max_sym_shndx_count
= sym_count
;
12193 if (esdo
->this_hdr
.sh_type
== SHT_REL
12194 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
12195 /* Some backends use reloc_count in relocation sections
12196 to count particular types of relocs. Of course,
12197 reloc sections themselves can't have relocations. */
12199 else if (emit_relocs
)
12201 reloc_count
= sec
->reloc_count
;
12202 if (bed
->elf_backend_count_additional_relocs
)
12205 c
= (*bed
->elf_backend_count_additional_relocs
) (sec
);
12206 additional_reloc_count
+= c
;
12209 else if (bed
->elf_backend_count_relocs
)
12210 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
12212 esdi
= elf_section_data (sec
);
12214 if ((sec
->flags
& SEC_RELOC
) != 0)
12216 size_t ext_size
= 0;
12218 if (esdi
->rel
.hdr
!= NULL
)
12219 ext_size
= esdi
->rel
.hdr
->sh_size
;
12220 if (esdi
->rela
.hdr
!= NULL
)
12221 ext_size
+= esdi
->rela
.hdr
->sh_size
;
12223 if (ext_size
> max_external_reloc_size
)
12224 max_external_reloc_size
= ext_size
;
12225 if (sec
->reloc_count
> max_internal_reloc_count
)
12226 max_internal_reloc_count
= sec
->reloc_count
;
12231 if (reloc_count
== 0)
12234 reloc_count
+= additional_reloc_count
;
12235 o
->reloc_count
+= reloc_count
;
12237 if (p
->type
== bfd_indirect_link_order
&& emit_relocs
)
12241 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
12242 esdo
->rel
.count
+= additional_reloc_count
;
12244 if (esdi
->rela
.hdr
)
12246 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
12247 esdo
->rela
.count
+= additional_reloc_count
;
12253 esdo
->rela
.count
+= reloc_count
;
12255 esdo
->rel
.count
+= reloc_count
;
12259 if (o
->reloc_count
> 0)
12260 o
->flags
|= SEC_RELOC
;
12263 /* Explicitly clear the SEC_RELOC flag. The linker tends to
12264 set it (this is probably a bug) and if it is set
12265 assign_section_numbers will create a reloc section. */
12266 o
->flags
&=~ SEC_RELOC
;
12269 /* If the SEC_ALLOC flag is not set, force the section VMA to
12270 zero. This is done in elf_fake_sections as well, but forcing
12271 the VMA to 0 here will ensure that relocs against these
12272 sections are handled correctly. */
12273 if ((o
->flags
& SEC_ALLOC
) == 0
12274 && ! o
->user_set_vma
)
12278 if (! bfd_link_relocatable (info
) && merged
)
12279 elf_link_hash_traverse (htab
, _bfd_elf_link_sec_merge_syms
, abfd
);
12281 /* Figure out the file positions for everything but the symbol table
12282 and the relocs. We set symcount to force assign_section_numbers
12283 to create a symbol table. */
12284 abfd
->symcount
= info
->strip
!= strip_all
|| emit_relocs
;
12285 BFD_ASSERT (! abfd
->output_has_begun
);
12286 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
12289 /* Set sizes, and assign file positions for reloc sections. */
12290 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12292 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
12293 if ((o
->flags
& SEC_RELOC
) != 0)
12296 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
12300 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
12304 /* _bfd_elf_compute_section_file_positions makes temporary use
12305 of target_index. Reset it. */
12306 o
->target_index
= 0;
12308 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
12309 to count upwards while actually outputting the relocations. */
12310 esdo
->rel
.count
= 0;
12311 esdo
->rela
.count
= 0;
12313 if ((esdo
->this_hdr
.sh_offset
== (file_ptr
) -1)
12314 && !bfd_section_is_ctf (o
))
12316 /* Cache the section contents so that they can be compressed
12317 later. Use bfd_malloc since it will be freed by
12318 bfd_compress_section_contents. */
12319 unsigned char *contents
= esdo
->this_hdr
.contents
;
12320 if ((o
->flags
& SEC_ELF_COMPRESS
) == 0 || contents
!= NULL
)
12323 = (unsigned char *) bfd_malloc (esdo
->this_hdr
.sh_size
);
12324 if (contents
== NULL
)
12326 esdo
->this_hdr
.contents
= contents
;
12330 /* We have now assigned file positions for all the sections except .symtab,
12331 .strtab, and non-loaded reloc and compressed debugging sections. We start
12332 the .symtab section at the current file position, and write directly to it.
12333 We build the .strtab section in memory. */
12334 abfd
->symcount
= 0;
12335 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
12336 /* sh_name is set in prep_headers. */
12337 symtab_hdr
->sh_type
= SHT_SYMTAB
;
12338 /* sh_flags, sh_addr and sh_size all start off zero. */
12339 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
12340 /* sh_link is set in assign_section_numbers. */
12341 /* sh_info is set below. */
12342 /* sh_offset is set just below. */
12343 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
12345 if (max_sym_count
< 20)
12346 max_sym_count
= 20;
12347 htab
->strtabsize
= max_sym_count
;
12348 amt
= max_sym_count
* sizeof (struct elf_sym_strtab
);
12349 htab
->strtab
= (struct elf_sym_strtab
*) bfd_malloc (amt
);
12350 if (htab
->strtab
== NULL
)
12352 /* The real buffer will be allocated in elf_link_swap_symbols_out. */
12354 = (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF)
12355 ? (Elf_External_Sym_Shndx
*) -1 : NULL
);
12357 if (info
->strip
!= strip_all
|| emit_relocs
)
12359 file_ptr off
= elf_next_file_pos (abfd
);
12361 _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
12363 /* Note that at this point elf_next_file_pos (abfd) is
12364 incorrect. We do not yet know the size of the .symtab section.
12365 We correct next_file_pos below, after we do know the size. */
12367 /* Start writing out the symbol table. The first symbol is always a
12369 elfsym
.st_value
= 0;
12370 elfsym
.st_size
= 0;
12371 elfsym
.st_info
= 0;
12372 elfsym
.st_other
= 0;
12373 elfsym
.st_shndx
= SHN_UNDEF
;
12374 elfsym
.st_target_internal
= 0;
12375 if (elf_link_output_symstrtab (&flinfo
, NULL
, &elfsym
,
12376 bfd_und_section_ptr
, NULL
) != 1)
12379 /* Output a symbol for each section if asked or they are used for
12380 relocs. These symbols usually have no names. We store the
12381 index of each one in the index field of the section, so that
12382 we can find it again when outputting relocs. */
12384 if (bfd_keep_unused_section_symbols (abfd
) || emit_relocs
)
12386 bfd_boolean name_local_sections
12387 = (bed
->elf_backend_name_local_section_symbols
12388 && bed
->elf_backend_name_local_section_symbols (abfd
));
12389 const char *name
= NULL
;
12391 elfsym
.st_size
= 0;
12392 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
12393 elfsym
.st_other
= 0;
12394 elfsym
.st_value
= 0;
12395 elfsym
.st_target_internal
= 0;
12396 for (i
= 1; i
< elf_numsections (abfd
); i
++)
12398 o
= bfd_section_from_elf_index (abfd
, i
);
12401 o
->target_index
= bfd_get_symcount (abfd
);
12402 elfsym
.st_shndx
= i
;
12403 if (!bfd_link_relocatable (info
))
12404 elfsym
.st_value
= o
->vma
;
12405 if (name_local_sections
)
12407 if (elf_link_output_symstrtab (&flinfo
, name
, &elfsym
, o
,
12415 /* On some targets like Irix 5 the symbol split between local and global
12416 ones recorded in the sh_info field needs to be done between section
12417 and all other symbols. */
12418 if (bed
->elf_backend_elfsym_local_is_section
12419 && bed
->elf_backend_elfsym_local_is_section (abfd
))
12420 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
12422 /* Allocate some memory to hold information read in from the input
12424 if (max_contents_size
!= 0)
12426 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
12427 if (flinfo
.contents
== NULL
)
12431 if (max_external_reloc_size
!= 0)
12433 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
12434 if (flinfo
.external_relocs
== NULL
)
12438 if (max_internal_reloc_count
!= 0)
12440 amt
= max_internal_reloc_count
* sizeof (Elf_Internal_Rela
);
12441 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
12442 if (flinfo
.internal_relocs
== NULL
)
12446 if (max_sym_count
!= 0)
12448 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
12449 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
12450 if (flinfo
.external_syms
== NULL
)
12453 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
12454 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
12455 if (flinfo
.internal_syms
== NULL
)
12458 amt
= max_sym_count
* sizeof (long);
12459 flinfo
.indices
= (long int *) bfd_malloc (amt
);
12460 if (flinfo
.indices
== NULL
)
12463 amt
= max_sym_count
* sizeof (asection
*);
12464 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
12465 if (flinfo
.sections
== NULL
)
12469 if (max_sym_shndx_count
!= 0)
12471 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
12472 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
12473 if (flinfo
.locsym_shndx
== NULL
)
12479 bfd_vma base
, end
= 0; /* Both bytes. */
12482 for (sec
= htab
->tls_sec
;
12483 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
12486 bfd_size_type size
= sec
->size
;
12487 unsigned int opb
= bfd_octets_per_byte (abfd
, sec
);
12490 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
12492 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
12495 size
= ord
->offset
* opb
+ ord
->size
;
12497 end
= sec
->vma
+ size
/ opb
;
12499 base
= htab
->tls_sec
->vma
;
12500 /* Only align end of TLS section if static TLS doesn't have special
12501 alignment requirements. */
12502 if (bed
->static_tls_alignment
== 1)
12503 end
= align_power (end
, htab
->tls_sec
->alignment_power
);
12504 htab
->tls_size
= end
- base
;
12507 if (!_bfd_elf_fixup_eh_frame_hdr (info
))
12510 /* Since ELF permits relocations to be against local symbols, we
12511 must have the local symbols available when we do the relocations.
12512 Since we would rather only read the local symbols once, and we
12513 would rather not keep them in memory, we handle all the
12514 relocations for a single input file at the same time.
12516 Unfortunately, there is no way to know the total number of local
12517 symbols until we have seen all of them, and the local symbol
12518 indices precede the global symbol indices. This means that when
12519 we are generating relocatable output, and we see a reloc against
12520 a global symbol, we can not know the symbol index until we have
12521 finished examining all the local symbols to see which ones we are
12522 going to output. To deal with this, we keep the relocations in
12523 memory, and don't output them until the end of the link. This is
12524 an unfortunate waste of memory, but I don't see a good way around
12525 it. Fortunately, it only happens when performing a relocatable
12526 link, which is not the common case. FIXME: If keep_memory is set
12527 we could write the relocs out and then read them again; I don't
12528 know how bad the memory loss will be. */
12530 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
12531 sub
->output_has_begun
= FALSE
;
12532 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12534 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
12536 if (p
->type
== bfd_indirect_link_order
12537 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
12538 == bfd_target_elf_flavour
)
12539 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
12541 if (! sub
->output_has_begun
)
12543 if (! elf_link_input_bfd (&flinfo
, sub
))
12545 sub
->output_has_begun
= TRUE
;
12548 else if (p
->type
== bfd_section_reloc_link_order
12549 || p
->type
== bfd_symbol_reloc_link_order
)
12551 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
12556 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
12558 if (p
->type
== bfd_indirect_link_order
12559 && (bfd_get_flavour (sub
)
12560 == bfd_target_elf_flavour
)
12561 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
12562 != bed
->s
->elfclass
))
12564 const char *iclass
, *oclass
;
12566 switch (bed
->s
->elfclass
)
12568 case ELFCLASS64
: oclass
= "ELFCLASS64"; break;
12569 case ELFCLASS32
: oclass
= "ELFCLASS32"; break;
12570 case ELFCLASSNONE
: oclass
= "ELFCLASSNONE"; break;
12574 switch (elf_elfheader (sub
)->e_ident
[EI_CLASS
])
12576 case ELFCLASS64
: iclass
= "ELFCLASS64"; break;
12577 case ELFCLASS32
: iclass
= "ELFCLASS32"; break;
12578 case ELFCLASSNONE
: iclass
= "ELFCLASSNONE"; break;
12582 bfd_set_error (bfd_error_wrong_format
);
12584 /* xgettext:c-format */
12585 (_("%pB: file class %s incompatible with %s"),
12586 sub
, iclass
, oclass
);
12595 /* Free symbol buffer if needed. */
12596 if (!info
->reduce_memory_overheads
)
12598 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
12599 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
)
12601 free (elf_tdata (sub
)->symbuf
);
12602 elf_tdata (sub
)->symbuf
= NULL
;
12608 /* Output any global symbols that got converted to local in a
12609 version script or due to symbol visibility. We do this in a
12610 separate step since ELF requires all local symbols to appear
12611 prior to any global symbols. FIXME: We should only do this if
12612 some global symbols were, in fact, converted to become local.
12613 FIXME: Will this work correctly with the Irix 5 linker? */
12614 eoinfo
.failed
= FALSE
;
12615 eoinfo
.flinfo
= &flinfo
;
12616 eoinfo
.localsyms
= TRUE
;
12617 eoinfo
.file_sym_done
= FALSE
;
12618 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
12622 goto return_local_hash_table
;
12625 /* If backend needs to output some local symbols not present in the hash
12626 table, do it now. */
12627 if (bed
->elf_backend_output_arch_local_syms
12628 && (info
->strip
!= strip_all
|| emit_relocs
))
12630 typedef int (*out_sym_func
)
12631 (void *, const char *, Elf_Internal_Sym
*, asection
*,
12632 struct elf_link_hash_entry
*);
12634 if (! ((*bed
->elf_backend_output_arch_local_syms
)
12635 (abfd
, info
, &flinfo
,
12636 (out_sym_func
) elf_link_output_symstrtab
)))
12639 goto return_local_hash_table
;
12643 /* That wrote out all the local symbols. Finish up the symbol table
12644 with the global symbols. Even if we want to strip everything we
12645 can, we still need to deal with those global symbols that got
12646 converted to local in a version script. */
12648 /* The sh_info field records the index of the first non local symbol. */
12649 if (!symtab_hdr
->sh_info
)
12650 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
12653 && htab
->dynsym
!= NULL
12654 && htab
->dynsym
->output_section
!= bfd_abs_section_ptr
)
12656 Elf_Internal_Sym sym
;
12657 bfd_byte
*dynsym
= htab
->dynsym
->contents
;
12659 o
= htab
->dynsym
->output_section
;
12660 elf_section_data (o
)->this_hdr
.sh_info
= htab
->local_dynsymcount
+ 1;
12662 /* Write out the section symbols for the output sections. */
12663 if (bfd_link_pic (info
)
12664 || htab
->is_relocatable_executable
)
12670 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
12672 sym
.st_target_internal
= 0;
12674 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
12680 dynindx
= elf_section_data (s
)->dynindx
;
12683 indx
= elf_section_data (s
)->this_idx
;
12684 BFD_ASSERT (indx
> 0);
12685 sym
.st_shndx
= indx
;
12686 if (! check_dynsym (abfd
, &sym
))
12689 goto return_local_hash_table
;
12691 sym
.st_value
= s
->vma
;
12692 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
12694 /* Inform the linker of the addition of this symbol. */
12696 if (info
->callbacks
->ctf_new_dynsym
)
12697 info
->callbacks
->ctf_new_dynsym (dynindx
, &sym
);
12699 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
12703 /* Write out the local dynsyms. */
12704 if (htab
->dynlocal
)
12706 struct elf_link_local_dynamic_entry
*e
;
12707 for (e
= htab
->dynlocal
; e
; e
= e
->next
)
12712 /* Copy the internal symbol and turn off visibility.
12713 Note that we saved a word of storage and overwrote
12714 the original st_name with the dynstr_index. */
12716 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
12717 sym
.st_shndx
= SHN_UNDEF
;
12719 s
= bfd_section_from_elf_index (e
->input_bfd
,
12722 && s
->output_section
!= NULL
12723 && elf_section_data (s
->output_section
) != NULL
)
12726 elf_section_data (s
->output_section
)->this_idx
;
12727 if (! check_dynsym (abfd
, &sym
))
12730 goto return_local_hash_table
;
12732 sym
.st_value
= (s
->output_section
->vma
12734 + e
->isym
.st_value
);
12737 /* Inform the linker of the addition of this symbol. */
12739 if (info
->callbacks
->ctf_new_dynsym
)
12740 info
->callbacks
->ctf_new_dynsym (e
->dynindx
, &sym
);
12742 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
12743 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
12748 /* We get the global symbols from the hash table. */
12749 eoinfo
.failed
= FALSE
;
12750 eoinfo
.localsyms
= FALSE
;
12751 eoinfo
.flinfo
= &flinfo
;
12752 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
12756 goto return_local_hash_table
;
12759 /* If backend needs to output some symbols not present in the hash
12760 table, do it now. */
12761 if (bed
->elf_backend_output_arch_syms
12762 && (info
->strip
!= strip_all
|| emit_relocs
))
12764 typedef int (*out_sym_func
)
12765 (void *, const char *, Elf_Internal_Sym
*, asection
*,
12766 struct elf_link_hash_entry
*);
12768 if (! ((*bed
->elf_backend_output_arch_syms
)
12769 (abfd
, info
, &flinfo
,
12770 (out_sym_func
) elf_link_output_symstrtab
)))
12773 goto return_local_hash_table
;
12777 /* Finalize the .strtab section. */
12778 _bfd_elf_strtab_finalize (flinfo
.symstrtab
);
12780 /* Swap out the .strtab section. */
12781 if (!elf_link_swap_symbols_out (&flinfo
))
12784 goto return_local_hash_table
;
12787 /* Now we know the size of the symtab section. */
12788 if (bfd_get_symcount (abfd
) > 0)
12790 /* Finish up and write out the symbol string table (.strtab)
12792 Elf_Internal_Shdr
*symstrtab_hdr
= NULL
;
12793 file_ptr off
= symtab_hdr
->sh_offset
+ symtab_hdr
->sh_size
;
12795 if (elf_symtab_shndx_list (abfd
))
12797 symtab_shndx_hdr
= & elf_symtab_shndx_list (abfd
)->hdr
;
12799 if (symtab_shndx_hdr
!= NULL
&& symtab_shndx_hdr
->sh_name
!= 0)
12801 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
12802 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
12803 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
12804 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
12805 symtab_shndx_hdr
->sh_size
= amt
;
12807 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
12810 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
12811 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
12814 goto return_local_hash_table
;
12819 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
12820 /* sh_name was set in prep_headers. */
12821 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
12822 symstrtab_hdr
->sh_flags
= bed
->elf_strtab_flags
;
12823 symstrtab_hdr
->sh_addr
= 0;
12824 symstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (flinfo
.symstrtab
);
12825 symstrtab_hdr
->sh_entsize
= 0;
12826 symstrtab_hdr
->sh_link
= 0;
12827 symstrtab_hdr
->sh_info
= 0;
12828 /* sh_offset is set just below. */
12829 symstrtab_hdr
->sh_addralign
= 1;
12831 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
,
12833 elf_next_file_pos (abfd
) = off
;
12835 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
12836 || ! _bfd_elf_strtab_emit (abfd
, flinfo
.symstrtab
))
12839 goto return_local_hash_table
;
12843 if (info
->out_implib_bfd
&& !elf_output_implib (abfd
, info
))
12845 _bfd_error_handler (_("%pB: failed to generate import library"),
12846 info
->out_implib_bfd
);
12848 goto return_local_hash_table
;
12851 /* Adjust the relocs to have the correct symbol indices. */
12852 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
12854 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
12857 if ((o
->flags
& SEC_RELOC
) == 0)
12860 sort
= bed
->sort_relocs_p
== NULL
|| (*bed
->sort_relocs_p
) (o
);
12861 if (esdo
->rel
.hdr
!= NULL
12862 && !elf_link_adjust_relocs (abfd
, o
, &esdo
->rel
, sort
, info
))
12865 goto return_local_hash_table
;
12867 if (esdo
->rela
.hdr
!= NULL
12868 && !elf_link_adjust_relocs (abfd
, o
, &esdo
->rela
, sort
, info
))
12871 goto return_local_hash_table
;
12874 /* Set the reloc_count field to 0 to prevent write_relocs from
12875 trying to swap the relocs out itself. */
12876 o
->reloc_count
= 0;
12879 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
12880 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
12882 /* If we are linking against a dynamic object, or generating a
12883 shared library, finish up the dynamic linking information. */
12886 bfd_byte
*dyncon
, *dynconend
;
12888 /* Fix up .dynamic entries. */
12889 o
= bfd_get_linker_section (dynobj
, ".dynamic");
12890 BFD_ASSERT (o
!= NULL
);
12892 dyncon
= o
->contents
;
12893 dynconend
= o
->contents
+ o
->size
;
12894 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
12896 Elf_Internal_Dyn dyn
;
12899 bfd_size_type sh_size
;
12902 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
12909 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
12911 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
12913 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
12914 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
12917 dyn
.d_un
.d_val
= relativecount
;
12924 name
= info
->init_function
;
12927 name
= info
->fini_function
;
12930 struct elf_link_hash_entry
*h
;
12932 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
12934 && (h
->root
.type
== bfd_link_hash_defined
12935 || h
->root
.type
== bfd_link_hash_defweak
))
12937 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
12938 o
= h
->root
.u
.def
.section
;
12939 if (o
->output_section
!= NULL
)
12940 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
12941 + o
->output_offset
);
12944 /* The symbol is imported from another shared
12945 library and does not apply to this one. */
12946 dyn
.d_un
.d_ptr
= 0;
12953 case DT_PREINIT_ARRAYSZ
:
12954 name
= ".preinit_array";
12956 case DT_INIT_ARRAYSZ
:
12957 name
= ".init_array";
12959 case DT_FINI_ARRAYSZ
:
12960 name
= ".fini_array";
12962 o
= bfd_get_section_by_name (abfd
, name
);
12966 (_("could not find section %s"), name
);
12971 (_("warning: %s section has zero size"), name
);
12972 dyn
.d_un
.d_val
= o
->size
;
12975 case DT_PREINIT_ARRAY
:
12976 name
= ".preinit_array";
12978 case DT_INIT_ARRAY
:
12979 name
= ".init_array";
12981 case DT_FINI_ARRAY
:
12982 name
= ".fini_array";
12984 o
= bfd_get_section_by_name (abfd
, name
);
12991 name
= ".gnu.hash";
13000 name
= ".gnu.version_d";
13003 name
= ".gnu.version_r";
13006 name
= ".gnu.version";
13008 o
= bfd_get_linker_section (dynobj
, name
);
13010 if (o
== NULL
|| bfd_is_abs_section (o
->output_section
))
13013 (_("could not find section %s"), name
);
13016 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
13019 (_("warning: section '%s' is being made into a note"), name
);
13020 bfd_set_error (bfd_error_nonrepresentable_section
);
13023 dyn
.d_un
.d_ptr
= o
->output_section
->vma
+ o
->output_offset
;
13030 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
13036 for (i
= 1; i
< elf_numsections (abfd
); i
++)
13038 Elf_Internal_Shdr
*hdr
;
13040 hdr
= elf_elfsections (abfd
)[i
];
13041 if (hdr
->sh_type
== type
13042 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
13044 sh_size
+= hdr
->sh_size
;
13046 || sh_addr
> hdr
->sh_addr
)
13047 sh_addr
= hdr
->sh_addr
;
13051 if (bed
->dtrel_excludes_plt
&& htab
->srelplt
!= NULL
)
13053 unsigned int opb
= bfd_octets_per_byte (abfd
, o
);
13055 /* Don't count procedure linkage table relocs in the
13056 overall reloc count. */
13057 sh_size
-= htab
->srelplt
->size
;
13059 /* If the size is zero, make the address zero too.
13060 This is to avoid a glibc bug. If the backend
13061 emits DT_RELA/DT_RELASZ even when DT_RELASZ is
13062 zero, then we'll put DT_RELA at the end of
13063 DT_JMPREL. glibc will interpret the end of
13064 DT_RELA matching the end of DT_JMPREL as the
13065 case where DT_RELA includes DT_JMPREL, and for
13066 LD_BIND_NOW will decide that processing DT_RELA
13067 will process the PLT relocs too. Net result:
13068 No PLT relocs applied. */
13071 /* If .rela.plt is the first .rela section, exclude
13072 it from DT_RELA. */
13073 else if (sh_addr
== (htab
->srelplt
->output_section
->vma
13074 + htab
->srelplt
->output_offset
) * opb
)
13075 sh_addr
+= htab
->srelplt
->size
;
13078 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
13079 dyn
.d_un
.d_val
= sh_size
;
13081 dyn
.d_un
.d_ptr
= sh_addr
;
13084 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
13088 /* If we have created any dynamic sections, then output them. */
13089 if (dynobj
!= NULL
)
13091 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
13094 /* Check for DT_TEXTREL (late, in case the backend removes it). */
13095 if (bfd_link_textrel_check (info
)
13096 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
13098 bfd_byte
*dyncon
, *dynconend
;
13100 dyncon
= o
->contents
;
13101 dynconend
= o
->contents
+ o
->size
;
13102 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
13104 Elf_Internal_Dyn dyn
;
13106 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
13108 if (dyn
.d_tag
== DT_TEXTREL
)
13110 if (info
->textrel_check
== textrel_check_error
)
13111 info
->callbacks
->einfo
13112 (_("%P%X: read-only segment has dynamic relocations\n"));
13113 else if (bfd_link_dll (info
))
13114 info
->callbacks
->einfo
13115 (_("%P: warning: creating DT_TEXTREL in a shared object\n"));
13117 info
->callbacks
->einfo
13118 (_("%P: warning: creating DT_TEXTREL in a PIE\n"));
13124 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
13126 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
13128 || o
->output_section
== bfd_abs_section_ptr
)
13130 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
13132 /* At this point, we are only interested in sections
13133 created by _bfd_elf_link_create_dynamic_sections. */
13136 if (htab
->stab_info
.stabstr
== o
)
13138 if (htab
->eh_info
.hdr_sec
== o
)
13140 if (strcmp (o
->name
, ".dynstr") != 0)
13142 bfd_size_type octets
= ((file_ptr
) o
->output_offset
13143 * bfd_octets_per_byte (abfd
, o
));
13144 if (!bfd_set_section_contents (abfd
, o
->output_section
,
13145 o
->contents
, octets
, o
->size
))
13150 /* The contents of the .dynstr section are actually in a
13154 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
13155 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
13156 || !_bfd_elf_strtab_emit (abfd
, htab
->dynstr
))
13162 if (!info
->resolve_section_groups
)
13164 bfd_boolean failed
= FALSE
;
13166 BFD_ASSERT (bfd_link_relocatable (info
));
13167 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
13172 /* If we have optimized stabs strings, output them. */
13173 if (htab
->stab_info
.stabstr
!= NULL
)
13175 if (!_bfd_write_stab_strings (abfd
, &htab
->stab_info
))
13179 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
13182 if (info
->callbacks
->emit_ctf
)
13183 info
->callbacks
->emit_ctf ();
13185 elf_final_link_free (abfd
, &flinfo
);
13189 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
13190 if (contents
== NULL
)
13192 /* Bail out and fail. */
13194 goto return_local_hash_table
;
13196 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
13197 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
13201 return_local_hash_table
:
13202 if (info
->unique_symbol
)
13203 bfd_hash_table_free (&flinfo
.local_hash_table
);
13207 elf_final_link_free (abfd
, &flinfo
);
13209 goto return_local_hash_table
;
13212 /* Initialize COOKIE for input bfd ABFD. */
13215 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
13216 struct bfd_link_info
*info
, bfd
*abfd
)
13218 Elf_Internal_Shdr
*symtab_hdr
;
13219 const struct elf_backend_data
*bed
;
13221 bed
= get_elf_backend_data (abfd
);
13222 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
13224 cookie
->abfd
= abfd
;
13225 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
13226 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
13227 if (cookie
->bad_symtab
)
13229 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
13230 cookie
->extsymoff
= 0;
13234 cookie
->locsymcount
= symtab_hdr
->sh_info
;
13235 cookie
->extsymoff
= symtab_hdr
->sh_info
;
13238 if (bed
->s
->arch_size
== 32)
13239 cookie
->r_sym_shift
= 8;
13241 cookie
->r_sym_shift
= 32;
13243 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
13244 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
13246 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
13247 cookie
->locsymcount
, 0,
13249 if (cookie
->locsyms
== NULL
)
13251 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
13254 if (info
->keep_memory
)
13255 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
13260 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
13263 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
13265 Elf_Internal_Shdr
*symtab_hdr
;
13267 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
13268 if (symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
13269 free (cookie
->locsyms
);
13272 /* Initialize the relocation information in COOKIE for input section SEC
13273 of input bfd ABFD. */
13276 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
13277 struct bfd_link_info
*info
, bfd
*abfd
,
13280 if (sec
->reloc_count
== 0)
13282 cookie
->rels
= NULL
;
13283 cookie
->relend
= NULL
;
13287 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
13288 info
->keep_memory
);
13289 if (cookie
->rels
== NULL
)
13291 cookie
->rel
= cookie
->rels
;
13292 cookie
->relend
= cookie
->rels
+ sec
->reloc_count
;
13294 cookie
->rel
= cookie
->rels
;
13298 /* Free the memory allocated by init_reloc_cookie_rels,
13302 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
13305 if (elf_section_data (sec
)->relocs
!= cookie
->rels
)
13306 free (cookie
->rels
);
13309 /* Initialize the whole of COOKIE for input section SEC. */
13312 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
13313 struct bfd_link_info
*info
,
13316 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
13318 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
13323 fini_reloc_cookie (cookie
, sec
->owner
);
13328 /* Free the memory allocated by init_reloc_cookie_for_section,
13332 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
13335 fini_reloc_cookie_rels (cookie
, sec
);
13336 fini_reloc_cookie (cookie
, sec
->owner
);
13339 /* Garbage collect unused sections. */
13341 /* Default gc_mark_hook. */
13344 _bfd_elf_gc_mark_hook (asection
*sec
,
13345 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
13346 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
13347 struct elf_link_hash_entry
*h
,
13348 Elf_Internal_Sym
*sym
)
13352 switch (h
->root
.type
)
13354 case bfd_link_hash_defined
:
13355 case bfd_link_hash_defweak
:
13356 return h
->root
.u
.def
.section
;
13358 case bfd_link_hash_common
:
13359 return h
->root
.u
.c
.p
->section
;
13366 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
13371 /* Return the debug definition section. */
13374 elf_gc_mark_debug_section (asection
*sec ATTRIBUTE_UNUSED
,
13375 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
13376 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
13377 struct elf_link_hash_entry
*h
,
13378 Elf_Internal_Sym
*sym
)
13382 /* Return the global debug definition section. */
13383 if ((h
->root
.type
== bfd_link_hash_defined
13384 || h
->root
.type
== bfd_link_hash_defweak
)
13385 && (h
->root
.u
.def
.section
->flags
& SEC_DEBUGGING
) != 0)
13386 return h
->root
.u
.def
.section
;
13390 /* Return the local debug definition section. */
13391 asection
*isec
= bfd_section_from_elf_index (sec
->owner
,
13393 if ((isec
->flags
& SEC_DEBUGGING
) != 0)
13400 /* COOKIE->rel describes a relocation against section SEC, which is
13401 a section we've decided to keep. Return the section that contains
13402 the relocation symbol, or NULL if no section contains it. */
13405 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
13406 elf_gc_mark_hook_fn gc_mark_hook
,
13407 struct elf_reloc_cookie
*cookie
,
13408 bfd_boolean
*start_stop
)
13410 unsigned long r_symndx
;
13411 struct elf_link_hash_entry
*h
, *hw
;
13413 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
13414 if (r_symndx
== STN_UNDEF
)
13417 if (r_symndx
>= cookie
->locsymcount
13418 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
13420 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
13423 info
->callbacks
->einfo (_("%F%P: corrupt input: %pB\n"),
13427 while (h
->root
.type
== bfd_link_hash_indirect
13428 || h
->root
.type
== bfd_link_hash_warning
)
13429 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
13431 /* Keep all aliases of the symbol too. If an object symbol
13432 needs to be copied into .dynbss then all of its aliases
13433 should be present as dynamic symbols, not just the one used
13434 on the copy relocation. */
13436 while (hw
->is_weakalias
)
13442 if (start_stop
!= NULL
)
13444 /* To work around a glibc bug, mark XXX input sections
13445 when there is a reference to __start_XXX or __stop_XXX
13449 asection
*s
= h
->u2
.start_stop_section
;
13450 *start_stop
= !s
->gc_mark
;
13455 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
13458 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
13459 &cookie
->locsyms
[r_symndx
]);
13462 /* COOKIE->rel describes a relocation against section SEC, which is
13463 a section we've decided to keep. Mark the section that contains
13464 the relocation symbol. */
13467 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
13469 elf_gc_mark_hook_fn gc_mark_hook
,
13470 struct elf_reloc_cookie
*cookie
)
13473 bfd_boolean start_stop
= FALSE
;
13475 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
, &start_stop
);
13476 while (rsec
!= NULL
)
13478 if (!rsec
->gc_mark
)
13480 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
13481 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
13483 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
13488 rsec
= bfd_get_next_section_by_name (rsec
->owner
, rsec
);
13493 /* The mark phase of garbage collection. For a given section, mark
13494 it and any sections in this section's group, and all the sections
13495 which define symbols to which it refers. */
13498 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
13500 elf_gc_mark_hook_fn gc_mark_hook
)
13503 asection
*group_sec
, *eh_frame
;
13507 /* Mark all the sections in the group. */
13508 group_sec
= elf_section_data (sec
)->next_in_group
;
13509 if (group_sec
&& !group_sec
->gc_mark
)
13510 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
13513 /* Look through the section relocs. */
13515 eh_frame
= elf_eh_frame_section (sec
->owner
);
13516 if ((sec
->flags
& SEC_RELOC
) != 0
13517 && sec
->reloc_count
> 0
13518 && sec
!= eh_frame
)
13520 struct elf_reloc_cookie cookie
;
13522 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
13526 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
13527 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
13532 fini_reloc_cookie_for_section (&cookie
, sec
);
13536 if (ret
&& eh_frame
&& elf_fde_list (sec
))
13538 struct elf_reloc_cookie cookie
;
13540 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
13544 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
13545 gc_mark_hook
, &cookie
))
13547 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
13551 eh_frame
= elf_section_eh_frame_entry (sec
);
13552 if (ret
&& eh_frame
&& !eh_frame
->gc_mark
)
13553 if (!_bfd_elf_gc_mark (info
, eh_frame
, gc_mark_hook
))
13559 /* Scan and mark sections in a special or debug section group. */
13562 _bfd_elf_gc_mark_debug_special_section_group (asection
*grp
)
13564 /* Point to first section of section group. */
13566 /* Used to iterate the section group. */
13569 bfd_boolean is_special_grp
= TRUE
;
13570 bfd_boolean is_debug_grp
= TRUE
;
13572 /* First scan to see if group contains any section other than debug
13573 and special section. */
13574 ssec
= msec
= elf_next_in_group (grp
);
13577 if ((msec
->flags
& SEC_DEBUGGING
) == 0)
13578 is_debug_grp
= FALSE
;
13580 if ((msec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) != 0)
13581 is_special_grp
= FALSE
;
13583 msec
= elf_next_in_group (msec
);
13585 while (msec
!= ssec
);
13587 /* If this is a pure debug section group or pure special section group,
13588 keep all sections in this group. */
13589 if (is_debug_grp
|| is_special_grp
)
13594 msec
= elf_next_in_group (msec
);
13596 while (msec
!= ssec
);
13600 /* Keep debug and special sections. */
13603 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
13604 elf_gc_mark_hook_fn mark_hook
)
13608 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
13611 bfd_boolean some_kept
;
13612 bfd_boolean debug_frag_seen
;
13613 bfd_boolean has_kept_debug_info
;
13615 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
13617 isec
= ibfd
->sections
;
13618 if (isec
== NULL
|| isec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13621 /* Ensure all linker created sections are kept,
13622 see if any other section is already marked,
13623 and note if we have any fragmented debug sections. */
13624 debug_frag_seen
= some_kept
= has_kept_debug_info
= FALSE
;
13625 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13627 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
13629 else if (isec
->gc_mark
13630 && (isec
->flags
& SEC_ALLOC
) != 0
13631 && elf_section_type (isec
) != SHT_NOTE
)
13635 /* Since all sections, except for backend specific ones,
13636 have been garbage collected, call mark_hook on this
13637 section if any of its linked-to sections is marked. */
13638 asection
*linked_to_sec
;
13639 for (linked_to_sec
= elf_linked_to_section (isec
);
13640 linked_to_sec
!= NULL
&& !linked_to_sec
->linker_mark
;
13641 linked_to_sec
= elf_linked_to_section (linked_to_sec
))
13643 if (linked_to_sec
->gc_mark
)
13645 if (!_bfd_elf_gc_mark (info
, isec
, mark_hook
))
13649 linked_to_sec
->linker_mark
= 1;
13651 for (linked_to_sec
= elf_linked_to_section (isec
);
13652 linked_to_sec
!= NULL
&& linked_to_sec
->linker_mark
;
13653 linked_to_sec
= elf_linked_to_section (linked_to_sec
))
13654 linked_to_sec
->linker_mark
= 0;
13657 if (!debug_frag_seen
13658 && (isec
->flags
& SEC_DEBUGGING
)
13659 && CONST_STRNEQ (isec
->name
, ".debug_line."))
13660 debug_frag_seen
= TRUE
;
13661 else if (strcmp (bfd_section_name (isec
),
13662 "__patchable_function_entries") == 0
13663 && elf_linked_to_section (isec
) == NULL
)
13664 info
->callbacks
->einfo (_("%F%P: %pB(%pA): error: "
13665 "need linked-to section "
13666 "for --gc-sections\n"),
13667 isec
->owner
, isec
);
13670 /* If no non-note alloc section in this file will be kept, then
13671 we can toss out the debug and special sections. */
13675 /* Keep debug and special sections like .comment when they are
13676 not part of a group. Also keep section groups that contain
13677 just debug sections or special sections. NB: Sections with
13678 linked-to section has been handled above. */
13679 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13681 if ((isec
->flags
& SEC_GROUP
) != 0)
13682 _bfd_elf_gc_mark_debug_special_section_group (isec
);
13683 else if (((isec
->flags
& SEC_DEBUGGING
) != 0
13684 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0)
13685 && elf_next_in_group (isec
) == NULL
13686 && elf_linked_to_section (isec
) == NULL
)
13688 if (isec
->gc_mark
&& (isec
->flags
& SEC_DEBUGGING
) != 0)
13689 has_kept_debug_info
= TRUE
;
13692 /* Look for CODE sections which are going to be discarded,
13693 and find and discard any fragmented debug sections which
13694 are associated with that code section. */
13695 if (debug_frag_seen
)
13696 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13697 if ((isec
->flags
& SEC_CODE
) != 0
13698 && isec
->gc_mark
== 0)
13703 ilen
= strlen (isec
->name
);
13705 /* Association is determined by the name of the debug
13706 section containing the name of the code section as
13707 a suffix. For example .debug_line.text.foo is a
13708 debug section associated with .text.foo. */
13709 for (dsec
= ibfd
->sections
; dsec
!= NULL
; dsec
= dsec
->next
)
13713 if (dsec
->gc_mark
== 0
13714 || (dsec
->flags
& SEC_DEBUGGING
) == 0)
13717 dlen
= strlen (dsec
->name
);
13720 && strncmp (dsec
->name
+ (dlen
- ilen
),
13721 isec
->name
, ilen
) == 0)
13726 /* Mark debug sections referenced by kept debug sections. */
13727 if (has_kept_debug_info
)
13728 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
13730 && (isec
->flags
& SEC_DEBUGGING
) != 0)
13731 if (!_bfd_elf_gc_mark (info
, isec
,
13732 elf_gc_mark_debug_section
))
13739 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
13742 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13744 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
13748 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
13749 || elf_object_id (sub
) != elf_hash_table_id (elf_hash_table (info
))
13750 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
13753 if (o
== NULL
|| o
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13756 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
13758 /* When any section in a section group is kept, we keep all
13759 sections in the section group. If the first member of
13760 the section group is excluded, we will also exclude the
13762 if (o
->flags
& SEC_GROUP
)
13764 asection
*first
= elf_next_in_group (o
);
13765 o
->gc_mark
= first
->gc_mark
;
13771 /* Skip sweeping sections already excluded. */
13772 if (o
->flags
& SEC_EXCLUDE
)
13775 /* Since this is early in the link process, it is simple
13776 to remove a section from the output. */
13777 o
->flags
|= SEC_EXCLUDE
;
13779 if (info
->print_gc_sections
&& o
->size
!= 0)
13780 /* xgettext:c-format */
13781 _bfd_error_handler (_("removing unused section '%pA' in file '%pB'"),
13789 /* Propagate collected vtable information. This is called through
13790 elf_link_hash_traverse. */
13793 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
13795 /* Those that are not vtables. */
13797 || h
->u2
.vtable
== NULL
13798 || h
->u2
.vtable
->parent
== NULL
)
13801 /* Those vtables that do not have parents, we cannot merge. */
13802 if (h
->u2
.vtable
->parent
== (struct elf_link_hash_entry
*) -1)
13805 /* If we've already been done, exit. */
13806 if (h
->u2
.vtable
->used
&& h
->u2
.vtable
->used
[-1])
13809 /* Make sure the parent's table is up to date. */
13810 elf_gc_propagate_vtable_entries_used (h
->u2
.vtable
->parent
, okp
);
13812 if (h
->u2
.vtable
->used
== NULL
)
13814 /* None of this table's entries were referenced. Re-use the
13816 h
->u2
.vtable
->used
= h
->u2
.vtable
->parent
->u2
.vtable
->used
;
13817 h
->u2
.vtable
->size
= h
->u2
.vtable
->parent
->u2
.vtable
->size
;
13822 bfd_boolean
*cu
, *pu
;
13824 /* Or the parent's entries into ours. */
13825 cu
= h
->u2
.vtable
->used
;
13827 pu
= h
->u2
.vtable
->parent
->u2
.vtable
->used
;
13830 const struct elf_backend_data
*bed
;
13831 unsigned int log_file_align
;
13833 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
13834 log_file_align
= bed
->s
->log_file_align
;
13835 n
= h
->u2
.vtable
->parent
->u2
.vtable
->size
>> log_file_align
;
13850 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
13853 bfd_vma hstart
, hend
;
13854 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
13855 const struct elf_backend_data
*bed
;
13856 unsigned int log_file_align
;
13858 /* Take care of both those symbols that do not describe vtables as
13859 well as those that are not loaded. */
13861 || h
->u2
.vtable
== NULL
13862 || h
->u2
.vtable
->parent
== NULL
)
13865 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
13866 || h
->root
.type
== bfd_link_hash_defweak
);
13868 sec
= h
->root
.u
.def
.section
;
13869 hstart
= h
->root
.u
.def
.value
;
13870 hend
= hstart
+ h
->size
;
13872 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
13874 return *(bfd_boolean
*) okp
= FALSE
;
13875 bed
= get_elf_backend_data (sec
->owner
);
13876 log_file_align
= bed
->s
->log_file_align
;
13878 relend
= relstart
+ sec
->reloc_count
;
13880 for (rel
= relstart
; rel
< relend
; ++rel
)
13881 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
13883 /* If the entry is in use, do nothing. */
13884 if (h
->u2
.vtable
->used
13885 && (rel
->r_offset
- hstart
) < h
->u2
.vtable
->size
)
13887 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
13888 if (h
->u2
.vtable
->used
[entry
])
13891 /* Otherwise, kill it. */
13892 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
13898 /* Mark sections containing dynamically referenced symbols. When
13899 building shared libraries, we must assume that any visible symbol is
13903 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
13905 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
13906 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
13908 if ((h
->root
.type
== bfd_link_hash_defined
13909 || h
->root
.type
== bfd_link_hash_defweak
)
13910 && ((h
->ref_dynamic
&& !h
->forced_local
)
13911 || ((h
->def_regular
|| ELF_COMMON_DEF_P (h
))
13912 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
13913 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
13914 && (!bfd_link_executable (info
)
13915 || info
->gc_keep_exported
13916 || info
->export_dynamic
13919 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
13920 && (h
->versioned
>= versioned
13921 || !bfd_hide_sym_by_version (info
->version_info
,
13922 h
->root
.root
.string
)))))
13923 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
13928 /* Keep all sections containing symbols undefined on the command-line,
13929 and the section containing the entry symbol. */
13932 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
13934 struct bfd_sym_chain
*sym
;
13936 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
13938 struct elf_link_hash_entry
*h
;
13940 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
13941 FALSE
, FALSE
, FALSE
);
13944 && (h
->root
.type
== bfd_link_hash_defined
13945 || h
->root
.type
== bfd_link_hash_defweak
)
13946 && !bfd_is_const_section (h
->root
.u
.def
.section
))
13947 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
13952 bfd_elf_parse_eh_frame_entries (bfd
*abfd ATTRIBUTE_UNUSED
,
13953 struct bfd_link_info
*info
)
13955 bfd
*ibfd
= info
->input_bfds
;
13957 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
13960 struct elf_reloc_cookie cookie
;
13962 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
13964 sec
= ibfd
->sections
;
13965 if (sec
== NULL
|| sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
13968 if (!init_reloc_cookie (&cookie
, info
, ibfd
))
13971 for (sec
= ibfd
->sections
; sec
; sec
= sec
->next
)
13973 if (CONST_STRNEQ (bfd_section_name (sec
), ".eh_frame_entry")
13974 && init_reloc_cookie_rels (&cookie
, info
, ibfd
, sec
))
13976 _bfd_elf_parse_eh_frame_entry (info
, sec
, &cookie
);
13977 fini_reloc_cookie_rels (&cookie
, sec
);
13984 /* Do mark and sweep of unused sections. */
13987 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
13989 bfd_boolean ok
= TRUE
;
13991 elf_gc_mark_hook_fn gc_mark_hook
;
13992 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13993 struct elf_link_hash_table
*htab
;
13995 if (!bed
->can_gc_sections
13996 || !is_elf_hash_table (info
->hash
))
13998 _bfd_error_handler(_("warning: gc-sections option ignored"));
14002 bed
->gc_keep (info
);
14003 htab
= elf_hash_table (info
);
14005 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
14006 at the .eh_frame section if we can mark the FDEs individually. */
14007 for (sub
= info
->input_bfds
;
14008 info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
&& sub
!= NULL
;
14009 sub
= sub
->link
.next
)
14012 struct elf_reloc_cookie cookie
;
14014 sec
= sub
->sections
;
14015 if (sec
== NULL
|| sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
14017 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
14018 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
14020 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
14021 if (elf_section_data (sec
)->sec_info
14022 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
14023 elf_eh_frame_section (sub
) = sec
;
14024 fini_reloc_cookie_for_section (&cookie
, sec
);
14025 sec
= bfd_get_next_section_by_name (NULL
, sec
);
14029 /* Apply transitive closure to the vtable entry usage info. */
14030 elf_link_hash_traverse (htab
, elf_gc_propagate_vtable_entries_used
, &ok
);
14034 /* Kill the vtable relocations that were not used. */
14035 elf_link_hash_traverse (htab
, elf_gc_smash_unused_vtentry_relocs
, &ok
);
14039 /* Mark dynamically referenced symbols. */
14040 if (htab
->dynamic_sections_created
|| info
->gc_keep_exported
)
14041 elf_link_hash_traverse (htab
, bed
->gc_mark_dynamic_ref
, info
);
14043 /* Grovel through relocs to find out who stays ... */
14044 gc_mark_hook
= bed
->gc_mark_hook
;
14045 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link
.next
)
14049 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
14050 || elf_object_id (sub
) != elf_hash_table_id (htab
)
14051 || !(*bed
->relocs_compatible
) (sub
->xvec
, abfd
->xvec
))
14055 if (o
== NULL
|| o
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
14058 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
14059 Also treat note sections as a root, if the section is not part
14060 of a group. We must keep all PREINIT_ARRAY, INIT_ARRAY as
14061 well as FINI_ARRAY sections for ld -r. */
14062 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
14064 && (o
->flags
& SEC_EXCLUDE
) == 0
14065 && ((o
->flags
& SEC_KEEP
) != 0
14066 || (bfd_link_relocatable (info
)
14067 && ((elf_section_data (o
)->this_hdr
.sh_type
14068 == SHT_PREINIT_ARRAY
)
14069 || (elf_section_data (o
)->this_hdr
.sh_type
14071 || (elf_section_data (o
)->this_hdr
.sh_type
14072 == SHT_FINI_ARRAY
)))
14073 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
14074 && elf_next_in_group (o
) == NULL
14075 && elf_linked_to_section (o
) == NULL
)
14076 || ((elf_tdata (sub
)->has_gnu_osabi
& elf_gnu_osabi_retain
)
14077 && (elf_section_flags (o
) & SHF_GNU_RETAIN
))))
14079 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
14084 /* Allow the backend to mark additional target specific sections. */
14085 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
14087 /* ... and mark SEC_EXCLUDE for those that go. */
14088 return elf_gc_sweep (abfd
, info
);
14091 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
14094 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
14096 struct elf_link_hash_entry
*h
,
14099 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
14100 struct elf_link_hash_entry
**search
, *child
;
14101 size_t extsymcount
;
14102 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14104 /* The sh_info field of the symtab header tells us where the
14105 external symbols start. We don't care about the local symbols at
14107 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
14108 if (!elf_bad_symtab (abfd
))
14109 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
14111 sym_hashes
= elf_sym_hashes (abfd
);
14112 sym_hashes_end
= sym_hashes
+ extsymcount
;
14114 /* Hunt down the child symbol, which is in this section at the same
14115 offset as the relocation. */
14116 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
14118 if ((child
= *search
) != NULL
14119 && (child
->root
.type
== bfd_link_hash_defined
14120 || child
->root
.type
== bfd_link_hash_defweak
)
14121 && child
->root
.u
.def
.section
== sec
14122 && child
->root
.u
.def
.value
== offset
)
14126 /* xgettext:c-format */
14127 _bfd_error_handler (_("%pB: %pA+%#" PRIx64
": no symbol found for INHERIT"),
14128 abfd
, sec
, (uint64_t) offset
);
14129 bfd_set_error (bfd_error_invalid_operation
);
14133 if (!child
->u2
.vtable
)
14135 child
->u2
.vtable
= ((struct elf_link_virtual_table_entry
*)
14136 bfd_zalloc (abfd
, sizeof (*child
->u2
.vtable
)));
14137 if (!child
->u2
.vtable
)
14142 /* This *should* only be the absolute section. It could potentially
14143 be that someone has defined a non-global vtable though, which
14144 would be bad. It isn't worth paging in the local symbols to be
14145 sure though; that case should simply be handled by the assembler. */
14147 child
->u2
.vtable
->parent
= (struct elf_link_hash_entry
*) -1;
14150 child
->u2
.vtable
->parent
= h
;
14155 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
14158 bfd_elf_gc_record_vtentry (bfd
*abfd
, asection
*sec
,
14159 struct elf_link_hash_entry
*h
,
14162 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14163 unsigned int log_file_align
= bed
->s
->log_file_align
;
14167 /* xgettext:c-format */
14168 _bfd_error_handler (_("%pB: section '%pA': corrupt VTENTRY entry"),
14170 bfd_set_error (bfd_error_bad_value
);
14176 h
->u2
.vtable
= ((struct elf_link_virtual_table_entry
*)
14177 bfd_zalloc (abfd
, sizeof (*h
->u2
.vtable
)));
14182 if (addend
>= h
->u2
.vtable
->size
)
14184 size_t size
, bytes
, file_align
;
14185 bfd_boolean
*ptr
= h
->u2
.vtable
->used
;
14187 /* While the symbol is undefined, we have to be prepared to handle
14189 file_align
= 1 << log_file_align
;
14190 if (h
->root
.type
== bfd_link_hash_undefined
)
14191 size
= addend
+ file_align
;
14195 if (addend
>= size
)
14197 /* Oops! We've got a reference past the defined end of
14198 the table. This is probably a bug -- shall we warn? */
14199 size
= addend
+ file_align
;
14202 size
= (size
+ file_align
- 1) & -file_align
;
14204 /* Allocate one extra entry for use as a "done" flag for the
14205 consolidation pass. */
14206 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
14210 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
14216 oldbytes
= (((h
->u2
.vtable
->size
>> log_file_align
) + 1)
14217 * sizeof (bfd_boolean
));
14218 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
14222 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
14227 /* And arrange for that done flag to be at index -1. */
14228 h
->u2
.vtable
->used
= ptr
+ 1;
14229 h
->u2
.vtable
->size
= size
;
14232 h
->u2
.vtable
->used
[addend
>> log_file_align
] = TRUE
;
14237 /* Map an ELF section header flag to its corresponding string. */
14241 flagword flag_value
;
14242 } elf_flags_to_name_table
;
14244 static const elf_flags_to_name_table elf_flags_to_names
[] =
14246 { "SHF_WRITE", SHF_WRITE
},
14247 { "SHF_ALLOC", SHF_ALLOC
},
14248 { "SHF_EXECINSTR", SHF_EXECINSTR
},
14249 { "SHF_MERGE", SHF_MERGE
},
14250 { "SHF_STRINGS", SHF_STRINGS
},
14251 { "SHF_INFO_LINK", SHF_INFO_LINK
},
14252 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
14253 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
14254 { "SHF_GROUP", SHF_GROUP
},
14255 { "SHF_TLS", SHF_TLS
},
14256 { "SHF_MASKOS", SHF_MASKOS
},
14257 { "SHF_EXCLUDE", SHF_EXCLUDE
},
14260 /* Returns TRUE if the section is to be included, otherwise FALSE. */
14262 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
14263 struct flag_info
*flaginfo
,
14266 const bfd_vma sh_flags
= elf_section_flags (section
);
14268 if (!flaginfo
->flags_initialized
)
14270 bfd
*obfd
= info
->output_bfd
;
14271 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
14272 struct flag_info_list
*tf
= flaginfo
->flag_list
;
14274 int without_hex
= 0;
14276 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
14279 flagword (*lookup
) (char *);
14281 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
14282 if (lookup
!= NULL
)
14284 flagword hexval
= (*lookup
) ((char *) tf
->name
);
14288 if (tf
->with
== with_flags
)
14289 with_hex
|= hexval
;
14290 else if (tf
->with
== without_flags
)
14291 without_hex
|= hexval
;
14296 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
14298 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
14300 if (tf
->with
== with_flags
)
14301 with_hex
|= elf_flags_to_names
[i
].flag_value
;
14302 else if (tf
->with
== without_flags
)
14303 without_hex
|= elf_flags_to_names
[i
].flag_value
;
14310 info
->callbacks
->einfo
14311 (_("unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
14315 flaginfo
->flags_initialized
= TRUE
;
14316 flaginfo
->only_with_flags
|= with_hex
;
14317 flaginfo
->not_with_flags
|= without_hex
;
14320 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
14323 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
14329 struct alloc_got_off_arg
{
14331 struct bfd_link_info
*info
;
14334 /* We need a special top-level link routine to convert got reference counts
14335 to real got offsets. */
14338 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
14340 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
14341 bfd
*obfd
= gofarg
->info
->output_bfd
;
14342 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
14344 if (h
->got
.refcount
> 0)
14346 h
->got
.offset
= gofarg
->gotoff
;
14347 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
14350 h
->got
.offset
= (bfd_vma
) -1;
14355 /* And an accompanying bit to work out final got entry offsets once
14356 we're done. Should be called from final_link. */
14359 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
14360 struct bfd_link_info
*info
)
14363 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14365 struct alloc_got_off_arg gofarg
;
14367 BFD_ASSERT (abfd
== info
->output_bfd
);
14369 if (! is_elf_hash_table (info
->hash
))
14372 /* The GOT offset is relative to the .got section, but the GOT header is
14373 put into the .got.plt section, if the backend uses it. */
14374 if (bed
->want_got_plt
)
14377 gotoff
= bed
->got_header_size
;
14379 /* Do the local .got entries first. */
14380 for (i
= info
->input_bfds
; i
; i
= i
->link
.next
)
14382 bfd_signed_vma
*local_got
;
14383 size_t j
, locsymcount
;
14384 Elf_Internal_Shdr
*symtab_hdr
;
14386 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
14389 local_got
= elf_local_got_refcounts (i
);
14393 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
14394 if (elf_bad_symtab (i
))
14395 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
14397 locsymcount
= symtab_hdr
->sh_info
;
14399 for (j
= 0; j
< locsymcount
; ++j
)
14401 if (local_got
[j
] > 0)
14403 local_got
[j
] = gotoff
;
14404 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
14407 local_got
[j
] = (bfd_vma
) -1;
14411 /* Then the global .got entries. .plt refcounts are handled by
14412 adjust_dynamic_symbol */
14413 gofarg
.gotoff
= gotoff
;
14414 gofarg
.info
= info
;
14415 elf_link_hash_traverse (elf_hash_table (info
),
14416 elf_gc_allocate_got_offsets
,
14421 /* Many folk need no more in the way of final link than this, once
14422 got entry reference counting is enabled. */
14425 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
14427 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
14430 /* Invoke the regular ELF backend linker to do all the work. */
14431 return bfd_elf_final_link (abfd
, info
);
14435 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
14437 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
14439 if (rcookie
->bad_symtab
)
14440 rcookie
->rel
= rcookie
->rels
;
14442 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
14444 unsigned long r_symndx
;
14446 if (! rcookie
->bad_symtab
)
14447 if (rcookie
->rel
->r_offset
> offset
)
14449 if (rcookie
->rel
->r_offset
!= offset
)
14452 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
14453 if (r_symndx
== STN_UNDEF
)
14456 if (r_symndx
>= rcookie
->locsymcount
14457 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
14459 struct elf_link_hash_entry
*h
;
14461 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
14463 while (h
->root
.type
== bfd_link_hash_indirect
14464 || h
->root
.type
== bfd_link_hash_warning
)
14465 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
14467 if ((h
->root
.type
== bfd_link_hash_defined
14468 || h
->root
.type
== bfd_link_hash_defweak
)
14469 && (h
->root
.u
.def
.section
->owner
!= rcookie
->abfd
14470 || h
->root
.u
.def
.section
->kept_section
!= NULL
14471 || discarded_section (h
->root
.u
.def
.section
)))
14476 /* It's not a relocation against a global symbol,
14477 but it could be a relocation against a local
14478 symbol for a discarded section. */
14480 Elf_Internal_Sym
*isym
;
14482 /* Need to: get the symbol; get the section. */
14483 isym
= &rcookie
->locsyms
[r_symndx
];
14484 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
14486 && (isec
->kept_section
!= NULL
14487 || discarded_section (isec
)))
14495 /* Discard unneeded references to discarded sections.
14496 Returns -1 on error, 1 if any section's size was changed, 0 if
14497 nothing changed. This function assumes that the relocations are in
14498 sorted order, which is true for all known assemblers. */
14501 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
14503 struct elf_reloc_cookie cookie
;
14508 if (info
->traditional_format
14509 || !is_elf_hash_table (info
->hash
))
14512 o
= bfd_get_section_by_name (output_bfd
, ".stab");
14517 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
14520 || i
->reloc_count
== 0
14521 || i
->sec_info_type
!= SEC_INFO_TYPE_STABS
)
14525 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14528 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
14531 if (_bfd_discard_section_stabs (abfd
, i
,
14532 elf_section_data (i
)->sec_info
,
14533 bfd_elf_reloc_symbol_deleted_p
,
14537 fini_reloc_cookie_for_section (&cookie
, i
);
14542 if (info
->eh_frame_hdr_type
!= COMPACT_EH_HDR
)
14543 o
= bfd_get_section_by_name (output_bfd
, ".eh_frame");
14547 int eh_changed
= 0;
14548 unsigned int eh_alignment
; /* Octets. */
14550 for (i
= o
->map_head
.s
; i
!= NULL
; i
= i
->map_head
.s
)
14556 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14559 if (!init_reloc_cookie_for_section (&cookie
, info
, i
))
14562 _bfd_elf_parse_eh_frame (abfd
, info
, i
, &cookie
);
14563 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, i
,
14564 bfd_elf_reloc_symbol_deleted_p
,
14568 if (i
->size
!= i
->rawsize
)
14572 fini_reloc_cookie_for_section (&cookie
, i
);
14575 eh_alignment
= ((1 << o
->alignment_power
)
14576 * bfd_octets_per_byte (output_bfd
, o
));
14577 /* Skip over zero terminator, and prevent empty sections from
14578 adding alignment padding at the end. */
14579 for (i
= o
->map_tail
.s
; i
!= NULL
; i
= i
->map_tail
.s
)
14581 i
->flags
|= SEC_EXCLUDE
;
14582 else if (i
->size
> 4)
14584 /* The last non-empty eh_frame section doesn't need padding. */
14587 /* Any prior sections must pad the last FDE out to the output
14588 section alignment. Otherwise we might have zero padding
14589 between sections, which would be seen as a terminator. */
14590 for (; i
!= NULL
; i
= i
->map_tail
.s
)
14592 /* All but the last zero terminator should have been removed. */
14597 = (i
->size
+ eh_alignment
- 1) & -eh_alignment
;
14598 if (i
->size
!= size
)
14606 elf_link_hash_traverse (elf_hash_table (info
),
14607 _bfd_elf_adjust_eh_frame_global_symbol
, NULL
);
14610 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link
.next
)
14612 const struct elf_backend_data
*bed
;
14615 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
14617 s
= abfd
->sections
;
14618 if (s
== NULL
|| s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
14621 bed
= get_elf_backend_data (abfd
);
14623 if (bed
->elf_backend_discard_info
!= NULL
)
14625 if (!init_reloc_cookie (&cookie
, info
, abfd
))
14628 if ((*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
14631 fini_reloc_cookie (&cookie
, abfd
);
14635 if (info
->eh_frame_hdr_type
== COMPACT_EH_HDR
)
14636 _bfd_elf_end_eh_frame_parsing (info
);
14638 if (info
->eh_frame_hdr_type
14639 && !bfd_link_relocatable (info
)
14640 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
14647 _bfd_elf_section_already_linked (bfd
*abfd
,
14649 struct bfd_link_info
*info
)
14652 const char *name
, *key
;
14653 struct bfd_section_already_linked
*l
;
14654 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
14656 if (sec
->output_section
== bfd_abs_section_ptr
)
14659 flags
= sec
->flags
;
14661 /* Return if it isn't a linkonce section. A comdat group section
14662 also has SEC_LINK_ONCE set. */
14663 if ((flags
& SEC_LINK_ONCE
) == 0)
14666 /* Don't put group member sections on our list of already linked
14667 sections. They are handled as a group via their group section. */
14668 if (elf_sec_group (sec
) != NULL
)
14671 /* For a SHT_GROUP section, use the group signature as the key. */
14673 if ((flags
& SEC_GROUP
) != 0
14674 && elf_next_in_group (sec
) != NULL
14675 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
14676 key
= elf_group_name (elf_next_in_group (sec
));
14679 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
14680 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
14681 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
14684 /* Must be a user linkonce section that doesn't follow gcc's
14685 naming convention. In this case we won't be matching
14686 single member groups. */
14690 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
14692 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14694 /* We may have 2 different types of sections on the list: group
14695 sections with a signature of <key> (<key> is some string),
14696 and linkonce sections named .gnu.linkonce.<type>.<key>.
14697 Match like sections. LTO plugin sections are an exception.
14698 They are always named .gnu.linkonce.t.<key> and match either
14699 type of section. */
14700 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
14701 && ((flags
& SEC_GROUP
) != 0
14702 || strcmp (name
, l
->sec
->name
) == 0))
14703 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0
14704 || (sec
->owner
->flags
& BFD_PLUGIN
) != 0)
14706 /* The section has already been linked. See if we should
14707 issue a warning. */
14708 if (!_bfd_handle_already_linked (sec
, l
, info
))
14711 if (flags
& SEC_GROUP
)
14713 asection
*first
= elf_next_in_group (sec
);
14714 asection
*s
= first
;
14718 s
->output_section
= bfd_abs_section_ptr
;
14719 /* Record which group discards it. */
14720 s
->kept_section
= l
->sec
;
14721 s
= elf_next_in_group (s
);
14722 /* These lists are circular. */
14732 /* A single member comdat group section may be discarded by a
14733 linkonce section and vice versa. */
14734 if ((flags
& SEC_GROUP
) != 0)
14736 asection
*first
= elf_next_in_group (sec
);
14738 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
14739 /* Check this single member group against linkonce sections. */
14740 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14741 if ((l
->sec
->flags
& SEC_GROUP
) == 0
14742 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
14744 first
->output_section
= bfd_abs_section_ptr
;
14745 first
->kept_section
= l
->sec
;
14746 sec
->output_section
= bfd_abs_section_ptr
;
14751 /* Check this linkonce section against single member groups. */
14752 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14753 if (l
->sec
->flags
& SEC_GROUP
)
14755 asection
*first
= elf_next_in_group (l
->sec
);
14758 && elf_next_in_group (first
) == first
14759 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
14761 sec
->output_section
= bfd_abs_section_ptr
;
14762 sec
->kept_section
= first
;
14767 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
14768 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
14769 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
14770 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
14771 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
14772 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
14773 `.gnu.linkonce.t.F' section from a different bfd not requiring any
14774 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
14775 The reverse order cannot happen as there is never a bfd with only the
14776 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
14777 matter as here were are looking only for cross-bfd sections. */
14779 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
14780 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
14781 if ((l
->sec
->flags
& SEC_GROUP
) == 0
14782 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
14784 if (abfd
!= l
->sec
->owner
)
14785 sec
->output_section
= bfd_abs_section_ptr
;
14789 /* This is the first section with this name. Record it. */
14790 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
14791 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
14792 return sec
->output_section
== bfd_abs_section_ptr
;
14796 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
14798 return sym
->st_shndx
== SHN_COMMON
;
14802 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
14808 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
14810 return bfd_com_section_ptr
;
14814 _bfd_elf_default_got_elt_size (bfd
*abfd
,
14815 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
14816 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
14817 bfd
*ibfd ATTRIBUTE_UNUSED
,
14818 unsigned long symndx ATTRIBUTE_UNUSED
)
14820 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14821 return bed
->s
->arch_size
/ 8;
14824 /* Routines to support the creation of dynamic relocs. */
14826 /* Returns the name of the dynamic reloc section associated with SEC. */
14828 static const char *
14829 get_dynamic_reloc_section_name (bfd
* abfd
,
14831 bfd_boolean is_rela
)
14834 const char *old_name
= bfd_section_name (sec
);
14835 const char *prefix
= is_rela
? ".rela" : ".rel";
14837 if (old_name
== NULL
)
14840 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
14841 sprintf (name
, "%s%s", prefix
, old_name
);
14846 /* Returns the dynamic reloc section associated with SEC.
14847 If necessary compute the name of the dynamic reloc section based
14848 on SEC's name (looked up in ABFD's string table) and the setting
14852 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
14854 bfd_boolean is_rela
)
14856 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
14858 if (reloc_sec
== NULL
)
14860 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
14864 reloc_sec
= bfd_get_linker_section (abfd
, name
);
14866 if (reloc_sec
!= NULL
)
14867 elf_section_data (sec
)->sreloc
= reloc_sec
;
14874 /* Returns the dynamic reloc section associated with SEC. If the
14875 section does not exist it is created and attached to the DYNOBJ
14876 bfd and stored in the SRELOC field of SEC's elf_section_data
14879 ALIGNMENT is the alignment for the newly created section and
14880 IS_RELA defines whether the name should be .rela.<SEC's name>
14881 or .rel.<SEC's name>. The section name is looked up in the
14882 string table associated with ABFD. */
14885 _bfd_elf_make_dynamic_reloc_section (asection
*sec
,
14887 unsigned int alignment
,
14889 bfd_boolean is_rela
)
14891 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
14893 if (reloc_sec
== NULL
)
14895 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
14900 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
14902 if (reloc_sec
== NULL
)
14904 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
14905 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
14906 if ((sec
->flags
& SEC_ALLOC
) != 0)
14907 flags
|= SEC_ALLOC
| SEC_LOAD
;
14909 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
14910 if (reloc_sec
!= NULL
)
14912 /* _bfd_elf_get_sec_type_attr chooses a section type by
14913 name. Override as it may be wrong, eg. for a user
14914 section named "auto" we'll get ".relauto" which is
14915 seen to be a .rela section. */
14916 elf_section_type (reloc_sec
) = is_rela
? SHT_RELA
: SHT_REL
;
14917 if (!bfd_set_section_alignment (reloc_sec
, alignment
))
14922 elf_section_data (sec
)->sreloc
= reloc_sec
;
14928 /* Copy the ELF symbol type and other attributes for a linker script
14929 assignment from HSRC to HDEST. Generally this should be treated as
14930 if we found a strong non-dynamic definition for HDEST (except that
14931 ld ignores multiple definition errors). */
14933 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd
,
14934 struct bfd_link_hash_entry
*hdest
,
14935 struct bfd_link_hash_entry
*hsrc
)
14937 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*) hdest
;
14938 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*) hsrc
;
14939 Elf_Internal_Sym isym
;
14941 ehdest
->type
= ehsrc
->type
;
14942 ehdest
->target_internal
= ehsrc
->target_internal
;
14944 isym
.st_other
= ehsrc
->other
;
14945 elf_merge_st_other (abfd
, ehdest
, isym
.st_other
, NULL
, TRUE
, FALSE
);
14948 /* Append a RELA relocation REL to section S in BFD. */
14951 elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
14953 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14954 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
14955 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
14956 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
14959 /* Append a REL relocation REL to section S in BFD. */
14962 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
14964 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
14965 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
14966 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
14967 bed
->s
->swap_reloc_out (abfd
, rel
, loc
);
14970 /* Define __start, __stop, .startof. or .sizeof. symbol. */
14972 struct bfd_link_hash_entry
*
14973 bfd_elf_define_start_stop (struct bfd_link_info
*info
,
14974 const char *symbol
, asection
*sec
)
14976 struct elf_link_hash_entry
*h
;
14978 h
= elf_link_hash_lookup (elf_hash_table (info
), symbol
,
14979 FALSE
, FALSE
, TRUE
);
14980 /* NB: Common symbols will be turned into definition later. */
14982 && (h
->root
.type
== bfd_link_hash_undefined
14983 || h
->root
.type
== bfd_link_hash_undefweak
14984 || ((h
->ref_regular
|| h
->def_dynamic
)
14986 && h
->root
.type
!= bfd_link_hash_common
)))
14988 bfd_boolean was_dynamic
= h
->ref_dynamic
|| h
->def_dynamic
;
14989 h
->verinfo
.verdef
= NULL
;
14990 h
->root
.type
= bfd_link_hash_defined
;
14991 h
->root
.u
.def
.section
= sec
;
14992 h
->root
.u
.def
.value
= 0;
14993 h
->def_regular
= 1;
14994 h
->def_dynamic
= 0;
14996 h
->u2
.start_stop_section
= sec
;
14997 if (symbol
[0] == '.')
14999 /* .startof. and .sizeof. symbols are local. */
15000 const struct elf_backend_data
*bed
;
15001 bed
= get_elf_backend_data (info
->output_bfd
);
15002 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
15006 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
15007 h
->other
= ((h
->other
& ~ELF_ST_VISIBILITY (-1))
15008 | info
->start_stop_visibility
);
15010 bfd_elf_link_record_dynamic_symbol (info
, h
);
15017 /* Find dynamic relocs for H that apply to read-only sections. */
15020 _bfd_elf_readonly_dynrelocs (struct elf_link_hash_entry
*h
)
15022 struct elf_dyn_relocs
*p
;
15024 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
15026 asection
*s
= p
->sec
->output_section
;
15028 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
15034 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
15035 read-only sections. */
15038 _bfd_elf_maybe_set_textrel (struct elf_link_hash_entry
*h
, void *inf
)
15042 if (h
->root
.type
== bfd_link_hash_indirect
)
15045 sec
= _bfd_elf_readonly_dynrelocs (h
);
15048 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
15050 info
->flags
|= DF_TEXTREL
;
15051 /* xgettext:c-format */
15052 info
->callbacks
->minfo (_("%pB: dynamic relocation against `%pT' "
15053 "in read-only section `%pA'\n"),
15054 sec
->owner
, h
->root
.root
.string
, sec
);
15056 if (bfd_link_textrel_check (info
))
15057 /* xgettext:c-format */
15058 info
->callbacks
->einfo (_("%P: %pB: warning: relocation against `%s' "
15059 "in read-only section `%pA'\n"),
15060 sec
->owner
, h
->root
.root
.string
, sec
);
15062 /* Not an error, just cut short the traversal. */
15068 /* Add dynamic tags. */
15071 _bfd_elf_add_dynamic_tags (bfd
*output_bfd
, struct bfd_link_info
*info
,
15072 bfd_boolean need_dynamic_reloc
)
15074 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
15076 if (htab
->dynamic_sections_created
)
15078 /* Add some entries to the .dynamic section. We fill in the
15079 values later, in finish_dynamic_sections, but we must add
15080 the entries now so that we get the correct size for the
15081 .dynamic section. The DT_DEBUG entry is filled in by the
15082 dynamic linker and used by the debugger. */
15083 #define add_dynamic_entry(TAG, VAL) \
15084 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
15086 const struct elf_backend_data
*bed
15087 = get_elf_backend_data (output_bfd
);
15089 if (bfd_link_executable (info
))
15091 if (!add_dynamic_entry (DT_DEBUG
, 0))
15095 if (htab
->dt_pltgot_required
|| htab
->splt
->size
!= 0)
15097 /* DT_PLTGOT is used by prelink even if there is no PLT
15099 if (!add_dynamic_entry (DT_PLTGOT
, 0))
15103 if (htab
->dt_jmprel_required
|| htab
->srelplt
->size
!= 0)
15105 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
15106 || !add_dynamic_entry (DT_PLTREL
,
15107 (bed
->rela_plts_and_copies_p
15108 ? DT_RELA
: DT_REL
))
15109 || !add_dynamic_entry (DT_JMPREL
, 0))
15113 if (htab
->tlsdesc_plt
15114 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
15115 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
15118 if (need_dynamic_reloc
)
15120 if (bed
->rela_plts_and_copies_p
)
15122 if (!add_dynamic_entry (DT_RELA
, 0)
15123 || !add_dynamic_entry (DT_RELASZ
, 0)
15124 || !add_dynamic_entry (DT_RELAENT
,
15125 bed
->s
->sizeof_rela
))
15130 if (!add_dynamic_entry (DT_REL
, 0)
15131 || !add_dynamic_entry (DT_RELSZ
, 0)
15132 || !add_dynamic_entry (DT_RELENT
,
15133 bed
->s
->sizeof_rel
))
15137 /* If any dynamic relocs apply to a read-only section,
15138 then we need a DT_TEXTREL entry. */
15139 if ((info
->flags
& DF_TEXTREL
) == 0)
15140 elf_link_hash_traverse (htab
, _bfd_elf_maybe_set_textrel
,
15143 if ((info
->flags
& DF_TEXTREL
) != 0)
15145 if (htab
->ifunc_resolvers
)
15146 info
->callbacks
->einfo
15147 (_("%P: warning: GNU indirect functions with DT_TEXTREL "
15148 "may result in a segfault at runtime; recompile with %s\n"),
15149 bfd_link_dll (info
) ? "-fPIC" : "-fPIE");
15151 if (!add_dynamic_entry (DT_TEXTREL
, 0))
15156 #undef add_dynamic_entry