1 /* ELF linking support for BFD.
2 Copyright 1995-2013 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"
31 /* This struct is used to pass information to routines called via
32 elf_link_hash_traverse which must return failure. */
34 struct elf_info_failed
36 struct bfd_link_info
*info
;
40 /* This structure is used to pass information to
41 _bfd_elf_link_find_version_dependencies. */
43 struct elf_find_verdep_info
45 /* General link information. */
46 struct bfd_link_info
*info
;
47 /* The number of dependencies. */
49 /* Whether we had a failure. */
53 static bfd_boolean _bfd_elf_fix_symbol_flags
54 (struct elf_link_hash_entry
*, struct elf_info_failed
*);
56 /* Define a symbol in a dynamic linkage section. */
58 struct elf_link_hash_entry
*
59 _bfd_elf_define_linkage_sym (bfd
*abfd
,
60 struct bfd_link_info
*info
,
64 struct elf_link_hash_entry
*h
;
65 struct bfd_link_hash_entry
*bh
;
66 const struct elf_backend_data
*bed
;
68 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, FALSE
);
71 /* Zap symbol defined in an as-needed lib that wasn't linked.
72 This is a symptom of a larger problem: Absolute symbols
73 defined in shared libraries can't be overridden, because we
74 lose the link to the bfd which is via the symbol section. */
75 h
->root
.type
= bfd_link_hash_new
;
79 if (!_bfd_generic_link_add_one_symbol (info
, abfd
, name
, BSF_GLOBAL
,
81 get_elf_backend_data (abfd
)->collect
,
84 h
= (struct elf_link_hash_entry
*) bh
;
88 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
90 bed
= get_elf_backend_data (abfd
);
91 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
96 _bfd_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
100 struct elf_link_hash_entry
*h
;
101 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
102 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
104 /* This function may be called more than once. */
105 s
= bfd_get_linker_section (abfd
, ".got");
109 flags
= bed
->dynamic_sec_flags
;
111 s
= bfd_make_section_anyway_with_flags (abfd
,
112 (bed
->rela_plts_and_copies_p
113 ? ".rela.got" : ".rel.got"),
114 (bed
->dynamic_sec_flags
117 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
121 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
123 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
127 if (bed
->want_got_plt
)
129 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
131 || !bfd_set_section_alignment (abfd
, s
,
132 bed
->s
->log_file_align
))
137 /* The first bit of the global offset table is the header. */
138 s
->size
+= bed
->got_header_size
;
140 if (bed
->want_got_sym
)
142 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
143 (or .got.plt) section. We don't do this in the linker script
144 because we don't want to define the symbol if we are not creating
145 a global offset table. */
146 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
147 "_GLOBAL_OFFSET_TABLE_");
148 elf_hash_table (info
)->hgot
= h
;
156 /* Create a strtab to hold the dynamic symbol names. */
158 _bfd_elf_link_create_dynstrtab (bfd
*abfd
, struct bfd_link_info
*info
)
160 struct elf_link_hash_table
*hash_table
;
162 hash_table
= elf_hash_table (info
);
163 if (hash_table
->dynobj
== NULL
)
164 hash_table
->dynobj
= abfd
;
166 if (hash_table
->dynstr
== NULL
)
168 hash_table
->dynstr
= _bfd_elf_strtab_init ();
169 if (hash_table
->dynstr
== NULL
)
175 /* Create some sections which will be filled in with dynamic linking
176 information. ABFD is an input file which requires dynamic sections
177 to be created. The dynamic sections take up virtual memory space
178 when the final executable is run, so we need to create them before
179 addresses are assigned to the output sections. We work out the
180 actual contents and size of these sections later. */
183 _bfd_elf_link_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
187 const struct elf_backend_data
*bed
;
188 struct elf_link_hash_entry
*h
;
190 if (! is_elf_hash_table (info
->hash
))
193 if (elf_hash_table (info
)->dynamic_sections_created
)
196 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
199 abfd
= elf_hash_table (info
)->dynobj
;
200 bed
= get_elf_backend_data (abfd
);
202 flags
= bed
->dynamic_sec_flags
;
204 /* A dynamically linked executable has a .interp section, but a
205 shared library does not. */
206 if (info
->executable
)
208 s
= bfd_make_section_anyway_with_flags (abfd
, ".interp",
209 flags
| SEC_READONLY
);
214 /* Create sections to hold version informations. These are removed
215 if they are not needed. */
216 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_d",
217 flags
| SEC_READONLY
);
219 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
222 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version",
223 flags
| SEC_READONLY
);
225 || ! bfd_set_section_alignment (abfd
, s
, 1))
228 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_r",
229 flags
| SEC_READONLY
);
231 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
234 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynsym",
235 flags
| SEC_READONLY
);
237 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
240 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynstr",
241 flags
| SEC_READONLY
);
245 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynamic", flags
);
247 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
250 /* The special symbol _DYNAMIC is always set to the start of the
251 .dynamic section. We could set _DYNAMIC in a linker script, but we
252 only want to define it if we are, in fact, creating a .dynamic
253 section. We don't want to define it if there is no .dynamic
254 section, since on some ELF platforms the start up code examines it
255 to decide how to initialize the process. */
256 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "_DYNAMIC");
257 elf_hash_table (info
)->hdynamic
= h
;
263 s
= bfd_make_section_anyway_with_flags (abfd
, ".hash",
264 flags
| SEC_READONLY
);
266 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
268 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
271 if (info
->emit_gnu_hash
)
273 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.hash",
274 flags
| SEC_READONLY
);
276 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
278 /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section:
279 4 32-bit words followed by variable count of 64-bit words, then
280 variable count of 32-bit words. */
281 if (bed
->s
->arch_size
== 64)
282 elf_section_data (s
)->this_hdr
.sh_entsize
= 0;
284 elf_section_data (s
)->this_hdr
.sh_entsize
= 4;
287 /* Let the backend create the rest of the sections. This lets the
288 backend set the right flags. The backend will normally create
289 the .got and .plt sections. */
290 if (bed
->elf_backend_create_dynamic_sections
== NULL
291 || ! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
294 elf_hash_table (info
)->dynamic_sections_created
= TRUE
;
299 /* Create dynamic sections when linking against a dynamic object. */
302 _bfd_elf_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
304 flagword flags
, pltflags
;
305 struct elf_link_hash_entry
*h
;
307 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
308 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
310 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
311 .rel[a].bss sections. */
312 flags
= bed
->dynamic_sec_flags
;
315 if (bed
->plt_not_loaded
)
316 /* We do not clear SEC_ALLOC here because we still want the OS to
317 allocate space for the section; it's just that there's nothing
318 to read in from the object file. */
319 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
321 pltflags
|= SEC_ALLOC
| SEC_CODE
| SEC_LOAD
;
322 if (bed
->plt_readonly
)
323 pltflags
|= SEC_READONLY
;
325 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
327 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
331 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
333 if (bed
->want_plt_sym
)
335 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
336 "_PROCEDURE_LINKAGE_TABLE_");
337 elf_hash_table (info
)->hplt
= h
;
342 s
= bfd_make_section_anyway_with_flags (abfd
,
343 (bed
->rela_plts_and_copies_p
344 ? ".rela.plt" : ".rel.plt"),
345 flags
| SEC_READONLY
);
347 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
351 if (! _bfd_elf_create_got_section (abfd
, info
))
354 if (bed
->want_dynbss
)
356 /* The .dynbss section is a place to put symbols which are defined
357 by dynamic objects, are referenced by regular objects, and are
358 not functions. We must allocate space for them in the process
359 image and use a R_*_COPY reloc to tell the dynamic linker to
360 initialize them at run time. The linker script puts the .dynbss
361 section into the .bss section of the final image. */
362 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
363 (SEC_ALLOC
| SEC_LINKER_CREATED
));
367 /* The .rel[a].bss section holds copy relocs. This section is not
368 normally needed. We need to create it here, though, so that the
369 linker will map it to an output section. We can't just create it
370 only if we need it, because we will not know whether we need it
371 until we have seen all the input files, and the first time the
372 main linker code calls BFD after examining all the input files
373 (size_dynamic_sections) the input sections have already been
374 mapped to the output sections. If the section turns out not to
375 be needed, we can discard it later. We will never need this
376 section when generating a shared object, since they do not use
380 s
= bfd_make_section_anyway_with_flags (abfd
,
381 (bed
->rela_plts_and_copies_p
382 ? ".rela.bss" : ".rel.bss"),
383 flags
| SEC_READONLY
);
385 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
393 /* Record a new dynamic symbol. We record the dynamic symbols as we
394 read the input files, since we need to have a list of all of them
395 before we can determine the final sizes of the output sections.
396 Note that we may actually call this function even though we are not
397 going to output any dynamic symbols; in some cases we know that a
398 symbol should be in the dynamic symbol table, but only if there is
402 bfd_elf_link_record_dynamic_symbol (struct bfd_link_info
*info
,
403 struct elf_link_hash_entry
*h
)
405 if (h
->dynindx
== -1)
407 struct elf_strtab_hash
*dynstr
;
412 /* XXX: The ABI draft says the linker must turn hidden and
413 internal symbols into STB_LOCAL symbols when producing the
414 DSO. However, if ld.so honors st_other in the dynamic table,
415 this would not be necessary. */
416 switch (ELF_ST_VISIBILITY (h
->other
))
420 if (h
->root
.type
!= bfd_link_hash_undefined
421 && h
->root
.type
!= bfd_link_hash_undefweak
)
424 if (!elf_hash_table (info
)->is_relocatable_executable
)
432 h
->dynindx
= elf_hash_table (info
)->dynsymcount
;
433 ++elf_hash_table (info
)->dynsymcount
;
435 dynstr
= elf_hash_table (info
)->dynstr
;
438 /* Create a strtab to hold the dynamic symbol names. */
439 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
444 /* We don't put any version information in the dynamic string
446 name
= h
->root
.root
.string
;
447 p
= strchr (name
, ELF_VER_CHR
);
449 /* We know that the p points into writable memory. In fact,
450 there are only a few symbols that have read-only names, being
451 those like _GLOBAL_OFFSET_TABLE_ that are created specially
452 by the backends. Most symbols will have names pointing into
453 an ELF string table read from a file, or to objalloc memory. */
456 indx
= _bfd_elf_strtab_add (dynstr
, name
, p
!= NULL
);
461 if (indx
== (bfd_size_type
) -1)
463 h
->dynstr_index
= indx
;
469 /* Mark a symbol dynamic. */
472 bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info
*info
,
473 struct elf_link_hash_entry
*h
,
474 Elf_Internal_Sym
*sym
)
476 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
478 /* It may be called more than once on the same H. */
479 if(h
->dynamic
|| info
->relocatable
)
482 if ((info
->dynamic_data
483 && (h
->type
== STT_OBJECT
485 && ELF_ST_TYPE (sym
->st_info
) == STT_OBJECT
)))
487 && h
->root
.type
== bfd_link_hash_new
488 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
492 /* Record an assignment to a symbol made by a linker script. We need
493 this in case some dynamic object refers to this symbol. */
496 bfd_elf_record_link_assignment (bfd
*output_bfd
,
497 struct bfd_link_info
*info
,
502 struct elf_link_hash_entry
*h
, *hv
;
503 struct elf_link_hash_table
*htab
;
504 const struct elf_backend_data
*bed
;
506 if (!is_elf_hash_table (info
->hash
))
509 htab
= elf_hash_table (info
);
510 h
= elf_link_hash_lookup (htab
, name
, !provide
, TRUE
, FALSE
);
514 switch (h
->root
.type
)
516 case bfd_link_hash_defined
:
517 case bfd_link_hash_defweak
:
518 case bfd_link_hash_common
:
520 case bfd_link_hash_undefweak
:
521 case bfd_link_hash_undefined
:
522 /* Since we're defining the symbol, don't let it seem to have not
523 been defined. record_dynamic_symbol and size_dynamic_sections
524 may depend on this. */
525 h
->root
.type
= bfd_link_hash_new
;
526 if (h
->root
.u
.undef
.next
!= NULL
|| htab
->root
.undefs_tail
== &h
->root
)
527 bfd_link_repair_undef_list (&htab
->root
);
529 case bfd_link_hash_new
:
530 bfd_elf_link_mark_dynamic_symbol (info
, h
, NULL
);
533 case bfd_link_hash_indirect
:
534 /* We had a versioned symbol in a dynamic library. We make the
535 the versioned symbol point to this one. */
536 bed
= get_elf_backend_data (output_bfd
);
538 while (hv
->root
.type
== bfd_link_hash_indirect
539 || hv
->root
.type
== bfd_link_hash_warning
)
540 hv
= (struct elf_link_hash_entry
*) hv
->root
.u
.i
.link
;
541 /* We don't need to update h->root.u since linker will set them
543 h
->root
.type
= bfd_link_hash_undefined
;
544 hv
->root
.type
= bfd_link_hash_indirect
;
545 hv
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
546 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hv
);
548 case bfd_link_hash_warning
:
553 /* If this symbol is being provided by the linker script, and it is
554 currently defined by a dynamic object, but not by a regular
555 object, then mark it as undefined so that the generic linker will
556 force the correct value. */
560 h
->root
.type
= bfd_link_hash_undefined
;
562 /* If this symbol is not being provided by the linker script, and it is
563 currently defined by a dynamic object, but not by a regular object,
564 then clear out any version information because the symbol will not be
565 associated with the dynamic object any more. */
569 h
->verinfo
.verdef
= NULL
;
575 bed
= get_elf_backend_data (output_bfd
);
576 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
577 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
578 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
581 /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects
583 if (!info
->relocatable
585 && (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
586 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
))
592 || (info
->executable
&& elf_hash_table (info
)->is_relocatable_executable
))
595 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
598 /* If this is a weak defined symbol, and we know a corresponding
599 real symbol from the same dynamic object, make sure the real
600 symbol is also made into a dynamic symbol. */
601 if (h
->u
.weakdef
!= NULL
602 && h
->u
.weakdef
->dynindx
== -1)
604 if (! bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
612 /* Record a new local dynamic symbol. Returns 0 on failure, 1 on
613 success, and 2 on a failure caused by attempting to record a symbol
614 in a discarded section, eg. a discarded link-once section symbol. */
617 bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info
*info
,
622 struct elf_link_local_dynamic_entry
*entry
;
623 struct elf_link_hash_table
*eht
;
624 struct elf_strtab_hash
*dynstr
;
625 unsigned long dynstr_index
;
627 Elf_External_Sym_Shndx eshndx
;
628 char esym
[sizeof (Elf64_External_Sym
)];
630 if (! is_elf_hash_table (info
->hash
))
633 /* See if the entry exists already. */
634 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
635 if (entry
->input_bfd
== input_bfd
&& entry
->input_indx
== input_indx
)
638 amt
= sizeof (*entry
);
639 entry
= (struct elf_link_local_dynamic_entry
*) bfd_alloc (input_bfd
, amt
);
643 /* Go find the symbol, so that we can find it's name. */
644 if (!bfd_elf_get_elf_syms (input_bfd
, &elf_tdata (input_bfd
)->symtab_hdr
,
645 1, input_indx
, &entry
->isym
, esym
, &eshndx
))
647 bfd_release (input_bfd
, entry
);
651 if (entry
->isym
.st_shndx
!= SHN_UNDEF
652 && entry
->isym
.st_shndx
< SHN_LORESERVE
)
656 s
= bfd_section_from_elf_index (input_bfd
, entry
->isym
.st_shndx
);
657 if (s
== NULL
|| bfd_is_abs_section (s
->output_section
))
659 /* We can still bfd_release here as nothing has done another
660 bfd_alloc. We can't do this later in this function. */
661 bfd_release (input_bfd
, entry
);
666 name
= (bfd_elf_string_from_elf_section
667 (input_bfd
, elf_tdata (input_bfd
)->symtab_hdr
.sh_link
,
668 entry
->isym
.st_name
));
670 dynstr
= elf_hash_table (info
)->dynstr
;
673 /* Create a strtab to hold the dynamic symbol names. */
674 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
679 dynstr_index
= _bfd_elf_strtab_add (dynstr
, name
, FALSE
);
680 if (dynstr_index
== (unsigned long) -1)
682 entry
->isym
.st_name
= dynstr_index
;
684 eht
= elf_hash_table (info
);
686 entry
->next
= eht
->dynlocal
;
687 eht
->dynlocal
= entry
;
688 entry
->input_bfd
= input_bfd
;
689 entry
->input_indx
= input_indx
;
692 /* Whatever binding the symbol had before, it's now local. */
694 = ELF_ST_INFO (STB_LOCAL
, ELF_ST_TYPE (entry
->isym
.st_info
));
696 /* The dynindx will be set at the end of size_dynamic_sections. */
701 /* Return the dynindex of a local dynamic symbol. */
704 _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info
*info
,
708 struct elf_link_local_dynamic_entry
*e
;
710 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
711 if (e
->input_bfd
== input_bfd
&& e
->input_indx
== input_indx
)
716 /* This function is used to renumber the dynamic symbols, if some of
717 them are removed because they are marked as local. This is called
718 via elf_link_hash_traverse. */
721 elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
724 size_t *count
= (size_t *) data
;
729 if (h
->dynindx
!= -1)
730 h
->dynindx
= ++(*count
);
736 /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with
737 STB_LOCAL binding. */
740 elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
743 size_t *count
= (size_t *) data
;
745 if (!h
->forced_local
)
748 if (h
->dynindx
!= -1)
749 h
->dynindx
= ++(*count
);
754 /* Return true if the dynamic symbol for a given section should be
755 omitted when creating a shared library. */
757 _bfd_elf_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
758 struct bfd_link_info
*info
,
761 struct elf_link_hash_table
*htab
;
763 switch (elf_section_data (p
)->this_hdr
.sh_type
)
767 /* If sh_type is yet undecided, assume it could be
768 SHT_PROGBITS/SHT_NOBITS. */
770 htab
= elf_hash_table (info
);
771 if (p
== htab
->tls_sec
)
774 if (htab
->text_index_section
!= NULL
)
775 return p
!= htab
->text_index_section
&& p
!= htab
->data_index_section
;
777 if (strcmp (p
->name
, ".got") == 0
778 || strcmp (p
->name
, ".got.plt") == 0
779 || strcmp (p
->name
, ".plt") == 0)
783 if (htab
->dynobj
!= NULL
784 && (ip
= bfd_get_linker_section (htab
->dynobj
, p
->name
)) != NULL
785 && ip
->output_section
== p
)
790 /* There shouldn't be section relative relocations
791 against any other section. */
797 /* Assign dynsym indices. In a shared library we generate a section
798 symbol for each output section, which come first. Next come symbols
799 which have been forced to local binding. Then all of the back-end
800 allocated local dynamic syms, followed by the rest of the global
804 _bfd_elf_link_renumber_dynsyms (bfd
*output_bfd
,
805 struct bfd_link_info
*info
,
806 unsigned long *section_sym_count
)
808 unsigned long dynsymcount
= 0;
810 if (info
->shared
|| elf_hash_table (info
)->is_relocatable_executable
)
812 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
814 for (p
= output_bfd
->sections
; p
; p
= p
->next
)
815 if ((p
->flags
& SEC_EXCLUDE
) == 0
816 && (p
->flags
& SEC_ALLOC
) != 0
817 && !(*bed
->elf_backend_omit_section_dynsym
) (output_bfd
, info
, p
))
818 elf_section_data (p
)->dynindx
= ++dynsymcount
;
820 elf_section_data (p
)->dynindx
= 0;
822 *section_sym_count
= dynsymcount
;
824 elf_link_hash_traverse (elf_hash_table (info
),
825 elf_link_renumber_local_hash_table_dynsyms
,
828 if (elf_hash_table (info
)->dynlocal
)
830 struct elf_link_local_dynamic_entry
*p
;
831 for (p
= elf_hash_table (info
)->dynlocal
; p
; p
= p
->next
)
832 p
->dynindx
= ++dynsymcount
;
835 elf_link_hash_traverse (elf_hash_table (info
),
836 elf_link_renumber_hash_table_dynsyms
,
839 /* There is an unused NULL entry at the head of the table which
840 we must account for in our count. Unless there weren't any
841 symbols, which means we'll have no table at all. */
842 if (dynsymcount
!= 0)
845 elf_hash_table (info
)->dynsymcount
= dynsymcount
;
849 /* Merge st_other field. */
852 elf_merge_st_other (bfd
*abfd
, struct elf_link_hash_entry
*h
,
853 Elf_Internal_Sym
*isym
, bfd_boolean definition
,
856 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
858 /* If st_other has a processor-specific meaning, specific
859 code might be needed here. We never merge the visibility
860 attribute with the one from a dynamic object. */
861 if (bed
->elf_backend_merge_symbol_attribute
)
862 (*bed
->elf_backend_merge_symbol_attribute
) (h
, isym
, definition
,
865 /* If this symbol has default visibility and the user has requested
866 we not re-export it, then mark it as hidden. */
870 || (abfd
->my_archive
&& abfd
->my_archive
->no_export
))
871 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_INTERNAL
)
872 isym
->st_other
= (STV_HIDDEN
873 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
875 if (!dynamic
&& ELF_ST_VISIBILITY (isym
->st_other
) != 0)
877 unsigned char hvis
, symvis
, other
, nvis
;
879 /* Only merge the visibility. Leave the remainder of the
880 st_other field to elf_backend_merge_symbol_attribute. */
881 other
= h
->other
& ~ELF_ST_VISIBILITY (-1);
883 /* Combine visibilities, using the most constraining one. */
884 hvis
= ELF_ST_VISIBILITY (h
->other
);
885 symvis
= ELF_ST_VISIBILITY (isym
->st_other
);
891 nvis
= hvis
< symvis
? hvis
: symvis
;
893 h
->other
= other
| nvis
;
897 /* This function is called when we want to merge a new symbol with an
898 existing symbol. It handles the various cases which arise when we
899 find a definition in a dynamic object, or when there is already a
900 definition in a dynamic object. The new symbol is described by
901 NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table
902 entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK
903 if the old symbol was weak. We set POLD_ALIGNMENT to the alignment
904 of an old common symbol. We set OVERRIDE if the old symbol is
905 overriding a new definition. We set TYPE_CHANGE_OK if it is OK for
906 the type to change. We set SIZE_CHANGE_OK if it is OK for the size
907 to change. By OK to change, we mean that we shouldn't warn if the
908 type or size does change. */
911 _bfd_elf_merge_symbol (bfd
*abfd
,
912 struct bfd_link_info
*info
,
914 Elf_Internal_Sym
*sym
,
917 struct elf_link_hash_entry
**sym_hash
,
919 bfd_boolean
*pold_weak
,
920 unsigned int *pold_alignment
,
922 bfd_boolean
*override
,
923 bfd_boolean
*type_change_ok
,
924 bfd_boolean
*size_change_ok
)
926 asection
*sec
, *oldsec
;
927 struct elf_link_hash_entry
*h
;
928 struct elf_link_hash_entry
*hi
;
929 struct elf_link_hash_entry
*flip
;
932 bfd_boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
933 bfd_boolean newweak
, oldweak
, newfunc
, oldfunc
;
934 const struct elf_backend_data
*bed
;
940 bind
= ELF_ST_BIND (sym
->st_info
);
942 if (! bfd_is_und_section (sec
))
943 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, FALSE
, FALSE
);
945 h
= ((struct elf_link_hash_entry
*)
946 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, TRUE
, FALSE
, FALSE
));
951 bed
= get_elf_backend_data (abfd
);
953 /* This code is for coping with dynamic objects, and is only useful
954 if we are doing an ELF link. */
955 if (!(*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
958 /* For merging, we only care about real symbols. But we need to make
959 sure that indirect symbol dynamic flags are updated. */
961 while (h
->root
.type
== bfd_link_hash_indirect
962 || h
->root
.type
== bfd_link_hash_warning
)
963 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
965 /* We have to check it for every instance since the first few may be
966 references and not all compilers emit symbol type for undefined
968 bfd_elf_link_mark_dynamic_symbol (info
, h
, sym
);
970 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
971 respectively, is from a dynamic object. */
973 newdyn
= (abfd
->flags
& DYNAMIC
) != 0;
975 /* ref_dynamic_nonweak and dynamic_def flags track actual undefined
976 syms and defined syms in dynamic libraries respectively.
977 ref_dynamic on the other hand can be set for a symbol defined in
978 a dynamic library, and def_dynamic may not be set; When the
979 definition in a dynamic lib is overridden by a definition in the
980 executable use of the symbol in the dynamic lib becomes a
981 reference to the executable symbol. */
984 if (bfd_is_und_section (sec
))
986 if (bind
!= STB_WEAK
)
988 h
->ref_dynamic_nonweak
= 1;
989 hi
->ref_dynamic_nonweak
= 1;
999 /* If we just created the symbol, mark it as being an ELF symbol.
1000 Other than that, there is nothing to do--there is no merge issue
1001 with a newly defined symbol--so we just return. */
1003 if (h
->root
.type
== bfd_link_hash_new
)
1009 /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the
1012 switch (h
->root
.type
)
1019 case bfd_link_hash_undefined
:
1020 case bfd_link_hash_undefweak
:
1021 oldbfd
= h
->root
.u
.undef
.abfd
;
1025 case bfd_link_hash_defined
:
1026 case bfd_link_hash_defweak
:
1027 oldbfd
= h
->root
.u
.def
.section
->owner
;
1028 oldsec
= h
->root
.u
.def
.section
;
1031 case bfd_link_hash_common
:
1032 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
1033 oldsec
= h
->root
.u
.c
.p
->section
;
1035 *pold_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1038 if (poldbfd
&& *poldbfd
== NULL
)
1041 /* Differentiate strong and weak symbols. */
1042 newweak
= bind
== STB_WEAK
;
1043 oldweak
= (h
->root
.type
== bfd_link_hash_defweak
1044 || h
->root
.type
== bfd_link_hash_undefweak
);
1046 *pold_weak
= oldweak
;
1048 /* In cases involving weak versioned symbols, we may wind up trying
1049 to merge a symbol with itself. Catch that here, to avoid the
1050 confusion that results if we try to override a symbol with
1051 itself. The additional tests catch cases like
1052 _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
1053 dynamic object, which we do want to handle here. */
1055 && (newweak
|| oldweak
)
1056 && ((abfd
->flags
& DYNAMIC
) == 0
1057 || !h
->def_regular
))
1062 olddyn
= (oldbfd
->flags
& DYNAMIC
) != 0;
1063 else if (oldsec
!= NULL
)
1065 /* This handles the special SHN_MIPS_{TEXT,DATA} section
1066 indices used by MIPS ELF. */
1067 olddyn
= (oldsec
->symbol
->flags
& BSF_DYNAMIC
) != 0;
1070 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
1071 respectively, appear to be a definition rather than reference. */
1073 newdef
= !bfd_is_und_section (sec
) && !bfd_is_com_section (sec
);
1075 olddef
= (h
->root
.type
!= bfd_link_hash_undefined
1076 && h
->root
.type
!= bfd_link_hash_undefweak
1077 && h
->root
.type
!= bfd_link_hash_common
);
1079 /* NEWFUNC and OLDFUNC indicate whether the new or old symbol,
1080 respectively, appear to be a function. */
1082 newfunc
= (ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1083 && bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)));
1085 oldfunc
= (h
->type
!= STT_NOTYPE
1086 && bed
->is_function_type (h
->type
));
1088 /* When we try to create a default indirect symbol from the dynamic
1089 definition with the default version, we skip it if its type and
1090 the type of existing regular definition mismatch. We only do it
1091 if the existing regular definition won't be dynamic. */
1092 if (pold_alignment
== NULL
1094 && !info
->export_dynamic
1099 && (olddef
|| h
->root
.type
== bfd_link_hash_common
)
1100 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1101 && ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1102 && h
->type
!= STT_NOTYPE
1103 && !(newfunc
&& oldfunc
))
1109 /* Plugin symbol type isn't currently set. Stop bogus errors. */
1110 if (oldbfd
!= NULL
&& (oldbfd
->flags
& BFD_PLUGIN
) != 0)
1111 *type_change_ok
= TRUE
;
1113 /* Check TLS symbol. We don't check undefined symbol introduced by
1115 else if (oldbfd
!= NULL
1116 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1117 && (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
|| h
->type
== STT_TLS
))
1120 bfd_boolean ntdef
, tdef
;
1121 asection
*ntsec
, *tsec
;
1123 if (h
->type
== STT_TLS
)
1143 (*_bfd_error_handler
)
1144 (_("%s: TLS definition in %B section %A "
1145 "mismatches non-TLS definition in %B section %A"),
1146 tbfd
, tsec
, ntbfd
, ntsec
, h
->root
.root
.string
);
1147 else if (!tdef
&& !ntdef
)
1148 (*_bfd_error_handler
)
1149 (_("%s: TLS reference in %B "
1150 "mismatches non-TLS reference in %B"),
1151 tbfd
, ntbfd
, h
->root
.root
.string
);
1153 (*_bfd_error_handler
)
1154 (_("%s: TLS definition in %B section %A "
1155 "mismatches non-TLS reference in %B"),
1156 tbfd
, tsec
, ntbfd
, h
->root
.root
.string
);
1158 (*_bfd_error_handler
)
1159 (_("%s: TLS reference in %B "
1160 "mismatches non-TLS definition in %B section %A"),
1161 tbfd
, ntbfd
, ntsec
, h
->root
.root
.string
);
1163 bfd_set_error (bfd_error_bad_value
);
1167 /* If the old symbol has non-default visibility, we ignore the new
1168 definition from a dynamic object. */
1170 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1171 && !bfd_is_und_section (sec
))
1174 /* Make sure this symbol is dynamic. */
1176 hi
->ref_dynamic
= 1;
1177 /* A protected symbol has external availability. Make sure it is
1178 recorded as dynamic.
1180 FIXME: Should we check type and size for protected symbol? */
1181 if (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
1182 return bfd_elf_link_record_dynamic_symbol (info
, h
);
1187 && ELF_ST_VISIBILITY (sym
->st_other
) != STV_DEFAULT
1190 /* If the new symbol with non-default visibility comes from a
1191 relocatable file and the old definition comes from a dynamic
1192 object, we remove the old definition. */
1193 if (hi
->root
.type
== bfd_link_hash_indirect
)
1195 /* Handle the case where the old dynamic definition is
1196 default versioned. We need to copy the symbol info from
1197 the symbol with default version to the normal one if it
1198 was referenced before. */
1201 hi
->root
.type
= h
->root
.type
;
1202 h
->root
.type
= bfd_link_hash_indirect
;
1203 (*bed
->elf_backend_copy_indirect_symbol
) (info
, hi
, h
);
1205 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1206 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1208 /* If the new symbol is hidden or internal, completely undo
1209 any dynamic link state. */
1210 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1211 h
->forced_local
= 0;
1218 /* FIXME: Should we check type and size for protected symbol? */
1228 /* If the old symbol was undefined before, then it will still be
1229 on the undefs list. If the new symbol is undefined or
1230 common, we can't make it bfd_link_hash_new here, because new
1231 undefined or common symbols will be added to the undefs list
1232 by _bfd_generic_link_add_one_symbol. Symbols may not be
1233 added twice to the undefs list. Also, if the new symbol is
1234 undefweak then we don't want to lose the strong undef. */
1235 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1237 h
->root
.type
= bfd_link_hash_undefined
;
1238 h
->root
.u
.undef
.abfd
= abfd
;
1242 h
->root
.type
= bfd_link_hash_new
;
1243 h
->root
.u
.undef
.abfd
= NULL
;
1246 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1248 /* If the new symbol is hidden or internal, completely undo
1249 any dynamic link state. */
1250 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1251 h
->forced_local
= 0;
1257 /* FIXME: Should we check type and size for protected symbol? */
1263 /* If a new weak symbol definition comes from a regular file and the
1264 old symbol comes from a dynamic library, we treat the new one as
1265 strong. Similarly, an old weak symbol definition from a regular
1266 file is treated as strong when the new symbol comes from a dynamic
1267 library. Further, an old weak symbol from a dynamic library is
1268 treated as strong if the new symbol is from a dynamic library.
1269 This reflects the way glibc's ld.so works.
1271 Do this before setting *type_change_ok or *size_change_ok so that
1272 we warn properly when dynamic library symbols are overridden. */
1274 if (newdef
&& !newdyn
&& olddyn
)
1276 if (olddef
&& newdyn
)
1279 /* Allow changes between different types of function symbol. */
1280 if (newfunc
&& oldfunc
)
1281 *type_change_ok
= TRUE
;
1283 /* It's OK to change the type if either the existing symbol or the
1284 new symbol is weak. A type change is also OK if the old symbol
1285 is undefined and the new symbol is defined. */
1290 && h
->root
.type
== bfd_link_hash_undefined
))
1291 *type_change_ok
= TRUE
;
1293 /* It's OK to change the size if either the existing symbol or the
1294 new symbol is weak, or if the old symbol is undefined. */
1297 || h
->root
.type
== bfd_link_hash_undefined
)
1298 *size_change_ok
= TRUE
;
1300 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
1301 symbol, respectively, appears to be a common symbol in a dynamic
1302 object. If a symbol appears in an uninitialized section, and is
1303 not weak, and is not a function, then it may be a common symbol
1304 which was resolved when the dynamic object was created. We want
1305 to treat such symbols specially, because they raise special
1306 considerations when setting the symbol size: if the symbol
1307 appears as a common symbol in a regular object, and the size in
1308 the regular object is larger, we must make sure that we use the
1309 larger size. This problematic case can always be avoided in C,
1310 but it must be handled correctly when using Fortran shared
1313 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
1314 likewise for OLDDYNCOMMON and OLDDEF.
1316 Note that this test is just a heuristic, and that it is quite
1317 possible to have an uninitialized symbol in a shared object which
1318 is really a definition, rather than a common symbol. This could
1319 lead to some minor confusion when the symbol really is a common
1320 symbol in some regular object. However, I think it will be
1326 && (sec
->flags
& SEC_ALLOC
) != 0
1327 && (sec
->flags
& SEC_LOAD
) == 0
1330 newdyncommon
= TRUE
;
1332 newdyncommon
= FALSE
;
1336 && h
->root
.type
== bfd_link_hash_defined
1338 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
1339 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
1342 olddyncommon
= TRUE
;
1344 olddyncommon
= FALSE
;
1346 /* We now know everything about the old and new symbols. We ask the
1347 backend to check if we can merge them. */
1348 if (bed
->merge_symbol
!= NULL
)
1350 if (!bed
->merge_symbol (h
, sym
, psec
, newdef
, olddef
, oldbfd
, oldsec
))
1355 /* If both the old and the new symbols look like common symbols in a
1356 dynamic object, set the size of the symbol to the larger of the
1361 && sym
->st_size
!= h
->size
)
1363 /* Since we think we have two common symbols, issue a multiple
1364 common warning if desired. Note that we only warn if the
1365 size is different. If the size is the same, we simply let
1366 the old symbol override the new one as normally happens with
1367 symbols defined in dynamic objects. */
1369 if (! ((*info
->callbacks
->multiple_common
)
1370 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1373 if (sym
->st_size
> h
->size
)
1374 h
->size
= sym
->st_size
;
1376 *size_change_ok
= TRUE
;
1379 /* If we are looking at a dynamic object, and we have found a
1380 definition, we need to see if the symbol was already defined by
1381 some other object. If so, we want to use the existing
1382 definition, and we do not want to report a multiple symbol
1383 definition error; we do this by clobbering *PSEC to be
1384 bfd_und_section_ptr.
1386 We treat a common symbol as a definition if the symbol in the
1387 shared library is a function, since common symbols always
1388 represent variables; this can cause confusion in principle, but
1389 any such confusion would seem to indicate an erroneous program or
1390 shared library. We also permit a common symbol in a regular
1391 object to override a weak symbol in a shared object. */
1396 || (h
->root
.type
== bfd_link_hash_common
1397 && (newweak
|| newfunc
))))
1401 newdyncommon
= FALSE
;
1403 *psec
= sec
= bfd_und_section_ptr
;
1404 *size_change_ok
= TRUE
;
1406 /* If we get here when the old symbol is a common symbol, then
1407 we are explicitly letting it override a weak symbol or
1408 function in a dynamic object, and we don't want to warn about
1409 a type change. If the old symbol is a defined symbol, a type
1410 change warning may still be appropriate. */
1412 if (h
->root
.type
== bfd_link_hash_common
)
1413 *type_change_ok
= TRUE
;
1416 /* Handle the special case of an old common symbol merging with a
1417 new symbol which looks like a common symbol in a shared object.
1418 We change *PSEC and *PVALUE to make the new symbol look like a
1419 common symbol, and let _bfd_generic_link_add_one_symbol do the
1423 && h
->root
.type
== bfd_link_hash_common
)
1427 newdyncommon
= FALSE
;
1428 *pvalue
= sym
->st_size
;
1429 *psec
= sec
= bed
->common_section (oldsec
);
1430 *size_change_ok
= TRUE
;
1433 /* Skip weak definitions of symbols that are already defined. */
1434 if (newdef
&& olddef
&& newweak
)
1436 /* Don't skip new non-IR weak syms. */
1437 if (!(oldbfd
!= NULL
1438 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1439 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1442 /* Merge st_other. If the symbol already has a dynamic index,
1443 but visibility says it should not be visible, turn it into a
1445 elf_merge_st_other (abfd
, h
, sym
, newdef
, newdyn
);
1446 if (h
->dynindx
!= -1)
1447 switch (ELF_ST_VISIBILITY (h
->other
))
1451 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1456 /* If the old symbol is from a dynamic object, and the new symbol is
1457 a definition which is not from a dynamic object, then the new
1458 symbol overrides the old symbol. Symbols from regular files
1459 always take precedence over symbols from dynamic objects, even if
1460 they are defined after the dynamic object in the link.
1462 As above, we again permit a common symbol in a regular object to
1463 override a definition in a shared object if the shared object
1464 symbol is a function or is weak. */
1469 || (bfd_is_com_section (sec
)
1470 && (oldweak
|| oldfunc
)))
1475 /* Change the hash table entry to undefined, and let
1476 _bfd_generic_link_add_one_symbol do the right thing with the
1479 h
->root
.type
= bfd_link_hash_undefined
;
1480 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1481 *size_change_ok
= TRUE
;
1484 olddyncommon
= FALSE
;
1486 /* We again permit a type change when a common symbol may be
1487 overriding a function. */
1489 if (bfd_is_com_section (sec
))
1493 /* If a common symbol overrides a function, make sure
1494 that it isn't defined dynamically nor has type
1497 h
->type
= STT_NOTYPE
;
1499 *type_change_ok
= TRUE
;
1502 if (hi
->root
.type
== bfd_link_hash_indirect
)
1505 /* This union may have been set to be non-NULL when this symbol
1506 was seen in a dynamic object. We must force the union to be
1507 NULL, so that it is correct for a regular symbol. */
1508 h
->verinfo
.vertree
= NULL
;
1511 /* Handle the special case of a new common symbol merging with an
1512 old symbol that looks like it might be a common symbol defined in
1513 a shared object. Note that we have already handled the case in
1514 which a new common symbol should simply override the definition
1515 in the shared library. */
1518 && bfd_is_com_section (sec
)
1521 /* It would be best if we could set the hash table entry to a
1522 common symbol, but we don't know what to use for the section
1523 or the alignment. */
1524 if (! ((*info
->callbacks
->multiple_common
)
1525 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1528 /* If the presumed common symbol in the dynamic object is
1529 larger, pretend that the new symbol has its size. */
1531 if (h
->size
> *pvalue
)
1534 /* We need to remember the alignment required by the symbol
1535 in the dynamic object. */
1536 BFD_ASSERT (pold_alignment
);
1537 *pold_alignment
= h
->root
.u
.def
.section
->alignment_power
;
1540 olddyncommon
= FALSE
;
1542 h
->root
.type
= bfd_link_hash_undefined
;
1543 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1545 *size_change_ok
= TRUE
;
1546 *type_change_ok
= TRUE
;
1548 if (hi
->root
.type
== bfd_link_hash_indirect
)
1551 h
->verinfo
.vertree
= NULL
;
1556 /* Handle the case where we had a versioned symbol in a dynamic
1557 library and now find a definition in a normal object. In this
1558 case, we make the versioned symbol point to the normal one. */
1559 flip
->root
.type
= h
->root
.type
;
1560 flip
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
1561 h
->root
.type
= bfd_link_hash_indirect
;
1562 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) flip
;
1563 (*bed
->elf_backend_copy_indirect_symbol
) (info
, flip
, h
);
1567 flip
->ref_dynamic
= 1;
1574 /* This function is called to create an indirect symbol from the
1575 default for the symbol with the default version if needed. The
1576 symbol is described by H, NAME, SYM, SEC, and VALUE. We
1577 set DYNSYM if the new indirect symbol is dynamic. */
1580 _bfd_elf_add_default_symbol (bfd
*abfd
,
1581 struct bfd_link_info
*info
,
1582 struct elf_link_hash_entry
*h
,
1584 Elf_Internal_Sym
*sym
,
1588 bfd_boolean
*dynsym
)
1590 bfd_boolean type_change_ok
;
1591 bfd_boolean size_change_ok
;
1594 struct elf_link_hash_entry
*hi
;
1595 struct bfd_link_hash_entry
*bh
;
1596 const struct elf_backend_data
*bed
;
1597 bfd_boolean collect
;
1598 bfd_boolean dynamic
;
1599 bfd_boolean override
;
1601 size_t len
, shortlen
;
1604 /* If this symbol has a version, and it is the default version, we
1605 create an indirect symbol from the default name to the fully
1606 decorated name. This will cause external references which do not
1607 specify a version to be bound to this version of the symbol. */
1608 p
= strchr (name
, ELF_VER_CHR
);
1609 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
1612 bed
= get_elf_backend_data (abfd
);
1613 collect
= bed
->collect
;
1614 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
1616 shortlen
= p
- name
;
1617 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
1618 if (shortname
== NULL
)
1620 memcpy (shortname
, name
, shortlen
);
1621 shortname
[shortlen
] = '\0';
1623 /* We are going to create a new symbol. Merge it with any existing
1624 symbol with this name. For the purposes of the merge, act as
1625 though we were defining the symbol we just defined, although we
1626 actually going to define an indirect symbol. */
1627 type_change_ok
= FALSE
;
1628 size_change_ok
= FALSE
;
1630 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1631 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
1632 &type_change_ok
, &size_change_ok
))
1641 if (! (_bfd_generic_link_add_one_symbol
1642 (info
, abfd
, shortname
, BSF_INDIRECT
, bfd_ind_section_ptr
,
1643 0, name
, FALSE
, collect
, &bh
)))
1645 hi
= (struct elf_link_hash_entry
*) bh
;
1649 /* In this case the symbol named SHORTNAME is overriding the
1650 indirect symbol we want to add. We were planning on making
1651 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
1652 is the name without a version. NAME is the fully versioned
1653 name, and it is the default version.
1655 Overriding means that we already saw a definition for the
1656 symbol SHORTNAME in a regular object, and it is overriding
1657 the symbol defined in the dynamic object.
1659 When this happens, we actually want to change NAME, the
1660 symbol we just added, to refer to SHORTNAME. This will cause
1661 references to NAME in the shared object to become references
1662 to SHORTNAME in the regular object. This is what we expect
1663 when we override a function in a shared object: that the
1664 references in the shared object will be mapped to the
1665 definition in the regular object. */
1667 while (hi
->root
.type
== bfd_link_hash_indirect
1668 || hi
->root
.type
== bfd_link_hash_warning
)
1669 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1671 h
->root
.type
= bfd_link_hash_indirect
;
1672 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1676 hi
->ref_dynamic
= 1;
1680 if (! bfd_elf_link_record_dynamic_symbol (info
, hi
))
1685 /* Now set HI to H, so that the following code will set the
1686 other fields correctly. */
1690 /* Check if HI is a warning symbol. */
1691 if (hi
->root
.type
== bfd_link_hash_warning
)
1692 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1694 /* If there is a duplicate definition somewhere, then HI may not
1695 point to an indirect symbol. We will have reported an error to
1696 the user in that case. */
1698 if (hi
->root
.type
== bfd_link_hash_indirect
)
1700 struct elf_link_hash_entry
*ht
;
1702 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1703 (*bed
->elf_backend_copy_indirect_symbol
) (info
, ht
, hi
);
1705 /* See if the new flags lead us to realize that the symbol must
1711 if (! info
->executable
1718 if (hi
->ref_regular
)
1724 /* We also need to define an indirection from the nondefault version
1728 len
= strlen (name
);
1729 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, len
);
1730 if (shortname
== NULL
)
1732 memcpy (shortname
, name
, shortlen
);
1733 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
1735 /* Once again, merge with any existing symbol. */
1736 type_change_ok
= FALSE
;
1737 size_change_ok
= FALSE
;
1739 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1740 &hi
, NULL
, NULL
, NULL
, &skip
, &override
,
1741 &type_change_ok
, &size_change_ok
))
1749 /* Here SHORTNAME is a versioned name, so we don't expect to see
1750 the type of override we do in the case above unless it is
1751 overridden by a versioned definition. */
1752 if (hi
->root
.type
!= bfd_link_hash_defined
1753 && hi
->root
.type
!= bfd_link_hash_defweak
)
1754 (*_bfd_error_handler
)
1755 (_("%B: unexpected redefinition of indirect versioned symbol `%s'"),
1761 if (! (_bfd_generic_link_add_one_symbol
1762 (info
, abfd
, shortname
, BSF_INDIRECT
,
1763 bfd_ind_section_ptr
, 0, name
, FALSE
, collect
, &bh
)))
1765 hi
= (struct elf_link_hash_entry
*) bh
;
1767 /* If there is a duplicate definition somewhere, then HI may not
1768 point to an indirect symbol. We will have reported an error
1769 to the user in that case. */
1771 if (hi
->root
.type
== bfd_link_hash_indirect
)
1773 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
1775 /* See if the new flags lead us to realize that the symbol
1781 if (! info
->executable
1787 if (hi
->ref_regular
)
1797 /* This routine is used to export all defined symbols into the dynamic
1798 symbol table. It is called via elf_link_hash_traverse. */
1801 _bfd_elf_export_symbol (struct elf_link_hash_entry
*h
, void *data
)
1803 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
1805 /* Ignore indirect symbols. These are added by the versioning code. */
1806 if (h
->root
.type
== bfd_link_hash_indirect
)
1809 /* Ignore this if we won't export it. */
1810 if (!eif
->info
->export_dynamic
&& !h
->dynamic
)
1813 if (h
->dynindx
== -1
1814 && (h
->def_regular
|| h
->ref_regular
)
1815 && ! bfd_hide_sym_by_version (eif
->info
->version_info
,
1816 h
->root
.root
.string
))
1818 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
1828 /* Look through the symbols which are defined in other shared
1829 libraries and referenced here. Update the list of version
1830 dependencies. This will be put into the .gnu.version_r section.
1831 This function is called via elf_link_hash_traverse. */
1834 _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry
*h
,
1837 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
1838 Elf_Internal_Verneed
*t
;
1839 Elf_Internal_Vernaux
*a
;
1842 /* We only care about symbols defined in shared objects with version
1847 || h
->verinfo
.verdef
== NULL
)
1850 /* See if we already know about this version. */
1851 for (t
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1855 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
1858 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1859 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
1865 /* This is a new version. Add it to tree we are building. */
1870 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1873 rinfo
->failed
= TRUE
;
1877 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
1878 t
->vn_nextref
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1879 elf_tdata (rinfo
->info
->output_bfd
)->verref
= t
;
1883 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1886 rinfo
->failed
= TRUE
;
1890 /* Note that we are copying a string pointer here, and testing it
1891 above. If bfd_elf_string_from_elf_section is ever changed to
1892 discard the string data when low in memory, this will have to be
1894 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
1896 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
1897 a
->vna_nextptr
= t
->vn_auxptr
;
1899 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
1902 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
1909 /* Figure out appropriate versions for all the symbols. We may not
1910 have the version number script until we have read all of the input
1911 files, so until that point we don't know which symbols should be
1912 local. This function is called via elf_link_hash_traverse. */
1915 _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry
*h
, void *data
)
1917 struct elf_info_failed
*sinfo
;
1918 struct bfd_link_info
*info
;
1919 const struct elf_backend_data
*bed
;
1920 struct elf_info_failed eif
;
1924 sinfo
= (struct elf_info_failed
*) data
;
1927 /* Fix the symbol flags. */
1930 if (! _bfd_elf_fix_symbol_flags (h
, &eif
))
1933 sinfo
->failed
= TRUE
;
1937 /* We only need version numbers for symbols defined in regular
1939 if (!h
->def_regular
)
1942 bed
= get_elf_backend_data (info
->output_bfd
);
1943 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
1944 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
1946 struct bfd_elf_version_tree
*t
;
1951 /* There are two consecutive ELF_VER_CHR characters if this is
1952 not a hidden symbol. */
1954 if (*p
== ELF_VER_CHR
)
1960 /* If there is no version string, we can just return out. */
1968 /* Look for the version. If we find it, it is no longer weak. */
1969 for (t
= sinfo
->info
->version_info
; t
!= NULL
; t
= t
->next
)
1971 if (strcmp (t
->name
, p
) == 0)
1975 struct bfd_elf_version_expr
*d
;
1977 len
= p
- h
->root
.root
.string
;
1978 alc
= (char *) bfd_malloc (len
);
1981 sinfo
->failed
= TRUE
;
1984 memcpy (alc
, h
->root
.root
.string
, len
- 1);
1985 alc
[len
- 1] = '\0';
1986 if (alc
[len
- 2] == ELF_VER_CHR
)
1987 alc
[len
- 2] = '\0';
1989 h
->verinfo
.vertree
= t
;
1993 if (t
->globals
.list
!= NULL
)
1994 d
= (*t
->match
) (&t
->globals
, NULL
, alc
);
1996 /* See if there is anything to force this symbol to
1998 if (d
== NULL
&& t
->locals
.list
!= NULL
)
2000 d
= (*t
->match
) (&t
->locals
, NULL
, alc
);
2003 && ! info
->export_dynamic
)
2004 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2012 /* If we are building an application, we need to create a
2013 version node for this version. */
2014 if (t
== NULL
&& info
->executable
)
2016 struct bfd_elf_version_tree
**pp
;
2019 /* If we aren't going to export this symbol, we don't need
2020 to worry about it. */
2021 if (h
->dynindx
== -1)
2025 t
= (struct bfd_elf_version_tree
*) bfd_zalloc (info
->output_bfd
, amt
);
2028 sinfo
->failed
= TRUE
;
2033 t
->name_indx
= (unsigned int) -1;
2037 /* Don't count anonymous version tag. */
2038 if (sinfo
->info
->version_info
!= NULL
2039 && sinfo
->info
->version_info
->vernum
== 0)
2041 for (pp
= &sinfo
->info
->version_info
;
2045 t
->vernum
= version_index
;
2049 h
->verinfo
.vertree
= t
;
2053 /* We could not find the version for a symbol when
2054 generating a shared archive. Return an error. */
2055 (*_bfd_error_handler
)
2056 (_("%B: version node not found for symbol %s"),
2057 info
->output_bfd
, h
->root
.root
.string
);
2058 bfd_set_error (bfd_error_bad_value
);
2059 sinfo
->failed
= TRUE
;
2067 /* If we don't have a version for this symbol, see if we can find
2069 if (h
->verinfo
.vertree
== NULL
&& sinfo
->info
->version_info
!= NULL
)
2074 = bfd_find_version_for_sym (sinfo
->info
->version_info
,
2075 h
->root
.root
.string
, &hide
);
2076 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2077 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2083 /* Read and swap the relocs from the section indicated by SHDR. This
2084 may be either a REL or a RELA section. The relocations are
2085 translated into RELA relocations and stored in INTERNAL_RELOCS,
2086 which should have already been allocated to contain enough space.
2087 The EXTERNAL_RELOCS are a buffer where the external form of the
2088 relocations should be stored.
2090 Returns FALSE if something goes wrong. */
2093 elf_link_read_relocs_from_section (bfd
*abfd
,
2095 Elf_Internal_Shdr
*shdr
,
2096 void *external_relocs
,
2097 Elf_Internal_Rela
*internal_relocs
)
2099 const struct elf_backend_data
*bed
;
2100 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2101 const bfd_byte
*erela
;
2102 const bfd_byte
*erelaend
;
2103 Elf_Internal_Rela
*irela
;
2104 Elf_Internal_Shdr
*symtab_hdr
;
2107 /* Position ourselves at the start of the section. */
2108 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2111 /* Read the relocations. */
2112 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2115 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2116 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
2118 bed
= get_elf_backend_data (abfd
);
2120 /* Convert the external relocations to the internal format. */
2121 if (shdr
->sh_entsize
== bed
->s
->sizeof_rel
)
2122 swap_in
= bed
->s
->swap_reloc_in
;
2123 else if (shdr
->sh_entsize
== bed
->s
->sizeof_rela
)
2124 swap_in
= bed
->s
->swap_reloca_in
;
2127 bfd_set_error (bfd_error_wrong_format
);
2131 erela
= (const bfd_byte
*) external_relocs
;
2132 erelaend
= erela
+ shdr
->sh_size
;
2133 irela
= internal_relocs
;
2134 while (erela
< erelaend
)
2138 (*swap_in
) (abfd
, erela
, irela
);
2139 r_symndx
= ELF32_R_SYM (irela
->r_info
);
2140 if (bed
->s
->arch_size
== 64)
2144 if ((size_t) r_symndx
>= nsyms
)
2146 (*_bfd_error_handler
)
2147 (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)"
2148 " for offset 0x%lx in section `%A'"),
2150 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2151 bfd_set_error (bfd_error_bad_value
);
2155 else if (r_symndx
!= STN_UNDEF
)
2157 (*_bfd_error_handler
)
2158 (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'"
2159 " when the object file has no symbol table"),
2161 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2162 bfd_set_error (bfd_error_bad_value
);
2165 irela
+= bed
->s
->int_rels_per_ext_rel
;
2166 erela
+= shdr
->sh_entsize
;
2172 /* Read and swap the relocs for a section O. They may have been
2173 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2174 not NULL, they are used as buffers to read into. They are known to
2175 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2176 the return value is allocated using either malloc or bfd_alloc,
2177 according to the KEEP_MEMORY argument. If O has two relocation
2178 sections (both REL and RELA relocations), then the REL_HDR
2179 relocations will appear first in INTERNAL_RELOCS, followed by the
2180 RELA_HDR relocations. */
2183 _bfd_elf_link_read_relocs (bfd
*abfd
,
2185 void *external_relocs
,
2186 Elf_Internal_Rela
*internal_relocs
,
2187 bfd_boolean keep_memory
)
2189 void *alloc1
= NULL
;
2190 Elf_Internal_Rela
*alloc2
= NULL
;
2191 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2192 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
2193 Elf_Internal_Rela
*internal_rela_relocs
;
2195 if (esdo
->relocs
!= NULL
)
2196 return esdo
->relocs
;
2198 if (o
->reloc_count
== 0)
2201 if (internal_relocs
== NULL
)
2205 size
= o
->reloc_count
;
2206 size
*= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
2208 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2210 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2211 if (internal_relocs
== NULL
)
2215 if (external_relocs
== NULL
)
2217 bfd_size_type size
= 0;
2220 size
+= esdo
->rel
.hdr
->sh_size
;
2222 size
+= esdo
->rela
.hdr
->sh_size
;
2224 alloc1
= bfd_malloc (size
);
2227 external_relocs
= alloc1
;
2230 internal_rela_relocs
= internal_relocs
;
2233 if (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rel
.hdr
,
2237 external_relocs
= (((bfd_byte
*) external_relocs
)
2238 + esdo
->rel
.hdr
->sh_size
);
2239 internal_rela_relocs
+= (NUM_SHDR_ENTRIES (esdo
->rel
.hdr
)
2240 * bed
->s
->int_rels_per_ext_rel
);
2244 && (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rela
.hdr
,
2246 internal_rela_relocs
)))
2249 /* Cache the results for next time, if we can. */
2251 esdo
->relocs
= internal_relocs
;
2256 /* Don't free alloc2, since if it was allocated we are passing it
2257 back (under the name of internal_relocs). */
2259 return internal_relocs
;
2267 bfd_release (abfd
, alloc2
);
2274 /* Compute the size of, and allocate space for, REL_HDR which is the
2275 section header for a section containing relocations for O. */
2278 _bfd_elf_link_size_reloc_section (bfd
*abfd
,
2279 struct bfd_elf_section_reloc_data
*reldata
)
2281 Elf_Internal_Shdr
*rel_hdr
= reldata
->hdr
;
2283 /* That allows us to calculate the size of the section. */
2284 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reldata
->count
;
2286 /* The contents field must last into write_object_contents, so we
2287 allocate it with bfd_alloc rather than malloc. Also since we
2288 cannot be sure that the contents will actually be filled in,
2289 we zero the allocated space. */
2290 rel_hdr
->contents
= (unsigned char *) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
2291 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
2294 if (reldata
->hashes
== NULL
&& reldata
->count
)
2296 struct elf_link_hash_entry
**p
;
2298 p
= (struct elf_link_hash_entry
**)
2299 bfd_zmalloc (reldata
->count
* sizeof (struct elf_link_hash_entry
*));
2303 reldata
->hashes
= p
;
2309 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
2310 originated from the section given by INPUT_REL_HDR) to the
2314 _bfd_elf_link_output_relocs (bfd
*output_bfd
,
2315 asection
*input_section
,
2316 Elf_Internal_Shdr
*input_rel_hdr
,
2317 Elf_Internal_Rela
*internal_relocs
,
2318 struct elf_link_hash_entry
**rel_hash
2321 Elf_Internal_Rela
*irela
;
2322 Elf_Internal_Rela
*irelaend
;
2324 struct bfd_elf_section_reloc_data
*output_reldata
;
2325 asection
*output_section
;
2326 const struct elf_backend_data
*bed
;
2327 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2328 struct bfd_elf_section_data
*esdo
;
2330 output_section
= input_section
->output_section
;
2332 bed
= get_elf_backend_data (output_bfd
);
2333 esdo
= elf_section_data (output_section
);
2334 if (esdo
->rel
.hdr
&& esdo
->rel
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2336 output_reldata
= &esdo
->rel
;
2337 swap_out
= bed
->s
->swap_reloc_out
;
2339 else if (esdo
->rela
.hdr
2340 && esdo
->rela
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2342 output_reldata
= &esdo
->rela
;
2343 swap_out
= bed
->s
->swap_reloca_out
;
2347 (*_bfd_error_handler
)
2348 (_("%B: relocation size mismatch in %B section %A"),
2349 output_bfd
, input_section
->owner
, input_section
);
2350 bfd_set_error (bfd_error_wrong_format
);
2354 erel
= output_reldata
->hdr
->contents
;
2355 erel
+= output_reldata
->count
* input_rel_hdr
->sh_entsize
;
2356 irela
= internal_relocs
;
2357 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
2358 * bed
->s
->int_rels_per_ext_rel
);
2359 while (irela
< irelaend
)
2361 (*swap_out
) (output_bfd
, irela
, erel
);
2362 irela
+= bed
->s
->int_rels_per_ext_rel
;
2363 erel
+= input_rel_hdr
->sh_entsize
;
2366 /* Bump the counter, so that we know where to add the next set of
2368 output_reldata
->count
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
2373 /* Make weak undefined symbols in PIE dynamic. */
2376 _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info
*info
,
2377 struct elf_link_hash_entry
*h
)
2381 && h
->root
.type
== bfd_link_hash_undefweak
)
2382 return bfd_elf_link_record_dynamic_symbol (info
, h
);
2387 /* Fix up the flags for a symbol. This handles various cases which
2388 can only be fixed after all the input files are seen. This is
2389 currently called by both adjust_dynamic_symbol and
2390 assign_sym_version, which is unnecessary but perhaps more robust in
2391 the face of future changes. */
2394 _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry
*h
,
2395 struct elf_info_failed
*eif
)
2397 const struct elf_backend_data
*bed
;
2399 /* If this symbol was mentioned in a non-ELF file, try to set
2400 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2401 permit a non-ELF file to correctly refer to a symbol defined in
2402 an ELF dynamic object. */
2405 while (h
->root
.type
== bfd_link_hash_indirect
)
2406 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2408 if (h
->root
.type
!= bfd_link_hash_defined
2409 && h
->root
.type
!= bfd_link_hash_defweak
)
2412 h
->ref_regular_nonweak
= 1;
2416 if (h
->root
.u
.def
.section
->owner
!= NULL
2417 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2418 == bfd_target_elf_flavour
))
2421 h
->ref_regular_nonweak
= 1;
2427 if (h
->dynindx
== -1
2431 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2440 /* Unfortunately, NON_ELF is only correct if the symbol
2441 was first seen in a non-ELF file. Fortunately, if the symbol
2442 was first seen in an ELF file, we're probably OK unless the
2443 symbol was defined in a non-ELF file. Catch that case here.
2444 FIXME: We're still in trouble if the symbol was first seen in
2445 a dynamic object, and then later in a non-ELF regular object. */
2446 if ((h
->root
.type
== bfd_link_hash_defined
2447 || h
->root
.type
== bfd_link_hash_defweak
)
2449 && (h
->root
.u
.def
.section
->owner
!= NULL
2450 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2451 != bfd_target_elf_flavour
)
2452 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
2453 && !h
->def_dynamic
)))
2457 /* Backend specific symbol fixup. */
2458 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
2459 if (bed
->elf_backend_fixup_symbol
2460 && !(*bed
->elf_backend_fixup_symbol
) (eif
->info
, h
))
2463 /* If this is a final link, and the symbol was defined as a common
2464 symbol in a regular object file, and there was no definition in
2465 any dynamic object, then the linker will have allocated space for
2466 the symbol in a common section but the DEF_REGULAR
2467 flag will not have been set. */
2468 if (h
->root
.type
== bfd_link_hash_defined
2472 && (h
->root
.u
.def
.section
->owner
->flags
& (DYNAMIC
| BFD_PLUGIN
)) == 0)
2475 /* If -Bsymbolic was used (which means to bind references to global
2476 symbols to the definition within the shared object), and this
2477 symbol was defined in a regular object, then it actually doesn't
2478 need a PLT entry. Likewise, if the symbol has non-default
2479 visibility. If the symbol has hidden or internal visibility, we
2480 will force it local. */
2482 && eif
->info
->shared
2483 && is_elf_hash_table (eif
->info
->hash
)
2484 && (SYMBOLIC_BIND (eif
->info
, h
)
2485 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2488 bfd_boolean force_local
;
2490 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
2491 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
2492 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
2495 /* If a weak undefined symbol has non-default visibility, we also
2496 hide it from the dynamic linker. */
2497 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2498 && h
->root
.type
== bfd_link_hash_undefweak
)
2499 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2501 /* If this is a weak defined symbol in a dynamic object, and we know
2502 the real definition in the dynamic object, copy interesting flags
2503 over to the real definition. */
2504 if (h
->u
.weakdef
!= NULL
)
2506 /* If the real definition is defined by a regular object file,
2507 don't do anything special. See the longer description in
2508 _bfd_elf_adjust_dynamic_symbol, below. */
2509 if (h
->u
.weakdef
->def_regular
)
2510 h
->u
.weakdef
= NULL
;
2513 struct elf_link_hash_entry
*weakdef
= h
->u
.weakdef
;
2515 while (h
->root
.type
== bfd_link_hash_indirect
)
2516 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2518 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2519 || h
->root
.type
== bfd_link_hash_defweak
);
2520 BFD_ASSERT (weakdef
->def_dynamic
);
2521 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
2522 || weakdef
->root
.type
== bfd_link_hash_defweak
);
2523 (*bed
->elf_backend_copy_indirect_symbol
) (eif
->info
, weakdef
, h
);
2530 /* Make the backend pick a good value for a dynamic symbol. This is
2531 called via elf_link_hash_traverse, and also calls itself
2535 _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry
*h
, void *data
)
2537 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2539 const struct elf_backend_data
*bed
;
2541 if (! is_elf_hash_table (eif
->info
->hash
))
2544 /* Ignore indirect symbols. These are added by the versioning code. */
2545 if (h
->root
.type
== bfd_link_hash_indirect
)
2548 /* Fix the symbol flags. */
2549 if (! _bfd_elf_fix_symbol_flags (h
, eif
))
2552 /* If this symbol does not require a PLT entry, and it is not
2553 defined by a dynamic object, or is not referenced by a regular
2554 object, ignore it. We do have to handle a weak defined symbol,
2555 even if no regular object refers to it, if we decided to add it
2556 to the dynamic symbol table. FIXME: Do we normally need to worry
2557 about symbols which are defined by one dynamic object and
2558 referenced by another one? */
2560 && h
->type
!= STT_GNU_IFUNC
2564 && (h
->u
.weakdef
== NULL
|| h
->u
.weakdef
->dynindx
== -1))))
2566 h
->plt
= elf_hash_table (eif
->info
)->init_plt_offset
;
2570 /* If we've already adjusted this symbol, don't do it again. This
2571 can happen via a recursive call. */
2572 if (h
->dynamic_adjusted
)
2575 /* Don't look at this symbol again. Note that we must set this
2576 after checking the above conditions, because we may look at a
2577 symbol once, decide not to do anything, and then get called
2578 recursively later after REF_REGULAR is set below. */
2579 h
->dynamic_adjusted
= 1;
2581 /* If this is a weak definition, and we know a real definition, and
2582 the real symbol is not itself defined by a regular object file,
2583 then get a good value for the real definition. We handle the
2584 real symbol first, for the convenience of the backend routine.
2586 Note that there is a confusing case here. If the real definition
2587 is defined by a regular object file, we don't get the real symbol
2588 from the dynamic object, but we do get the weak symbol. If the
2589 processor backend uses a COPY reloc, then if some routine in the
2590 dynamic object changes the real symbol, we will not see that
2591 change in the corresponding weak symbol. This is the way other
2592 ELF linkers work as well, and seems to be a result of the shared
2595 I will clarify this issue. Most SVR4 shared libraries define the
2596 variable _timezone and define timezone as a weak synonym. The
2597 tzset call changes _timezone. If you write
2598 extern int timezone;
2600 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
2601 you might expect that, since timezone is a synonym for _timezone,
2602 the same number will print both times. However, if the processor
2603 backend uses a COPY reloc, then actually timezone will be copied
2604 into your process image, and, since you define _timezone
2605 yourself, _timezone will not. Thus timezone and _timezone will
2606 wind up at different memory locations. The tzset call will set
2607 _timezone, leaving timezone unchanged. */
2609 if (h
->u
.weakdef
!= NULL
)
2611 /* If we get to this point, there is an implicit reference to
2612 H->U.WEAKDEF by a regular object file via the weak symbol H. */
2613 h
->u
.weakdef
->ref_regular
= 1;
2615 /* Ensure that the backend adjust_dynamic_symbol function sees
2616 H->U.WEAKDEF before H by recursively calling ourselves. */
2617 if (! _bfd_elf_adjust_dynamic_symbol (h
->u
.weakdef
, eif
))
2621 /* If a symbol has no type and no size and does not require a PLT
2622 entry, then we are probably about to do the wrong thing here: we
2623 are probably going to create a COPY reloc for an empty object.
2624 This case can arise when a shared object is built with assembly
2625 code, and the assembly code fails to set the symbol type. */
2627 && h
->type
== STT_NOTYPE
2629 (*_bfd_error_handler
)
2630 (_("warning: type and size of dynamic symbol `%s' are not defined"),
2631 h
->root
.root
.string
);
2633 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
2634 bed
= get_elf_backend_data (dynobj
);
2636 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
2645 /* Adjust the dynamic symbol, H, for copy in the dynamic bss section,
2649 _bfd_elf_adjust_dynamic_copy (struct elf_link_hash_entry
*h
,
2652 unsigned int power_of_two
;
2654 asection
*sec
= h
->root
.u
.def
.section
;
2656 /* The section aligment of definition is the maximum alignment
2657 requirement of symbols defined in the section. Since we don't
2658 know the symbol alignment requirement, we start with the
2659 maximum alignment and check low bits of the symbol address
2660 for the minimum alignment. */
2661 power_of_two
= bfd_get_section_alignment (sec
->owner
, sec
);
2662 mask
= ((bfd_vma
) 1 << power_of_two
) - 1;
2663 while ((h
->root
.u
.def
.value
& mask
) != 0)
2669 if (power_of_two
> bfd_get_section_alignment (dynbss
->owner
,
2672 /* Adjust the section alignment if needed. */
2673 if (! bfd_set_section_alignment (dynbss
->owner
, dynbss
,
2678 /* We make sure that the symbol will be aligned properly. */
2679 dynbss
->size
= BFD_ALIGN (dynbss
->size
, mask
+ 1);
2681 /* Define the symbol as being at this point in DYNBSS. */
2682 h
->root
.u
.def
.section
= dynbss
;
2683 h
->root
.u
.def
.value
= dynbss
->size
;
2685 /* Increment the size of DYNBSS to make room for the symbol. */
2686 dynbss
->size
+= h
->size
;
2691 /* Adjust all external symbols pointing into SEC_MERGE sections
2692 to reflect the object merging within the sections. */
2695 _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry
*h
, void *data
)
2699 if ((h
->root
.type
== bfd_link_hash_defined
2700 || h
->root
.type
== bfd_link_hash_defweak
)
2701 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
2702 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
2704 bfd
*output_bfd
= (bfd
*) data
;
2706 h
->root
.u
.def
.value
=
2707 _bfd_merged_section_offset (output_bfd
,
2708 &h
->root
.u
.def
.section
,
2709 elf_section_data (sec
)->sec_info
,
2710 h
->root
.u
.def
.value
);
2716 /* Returns false if the symbol referred to by H should be considered
2717 to resolve local to the current module, and true if it should be
2718 considered to bind dynamically. */
2721 _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
2722 struct bfd_link_info
*info
,
2723 bfd_boolean not_local_protected
)
2725 bfd_boolean binding_stays_local_p
;
2726 const struct elf_backend_data
*bed
;
2727 struct elf_link_hash_table
*hash_table
;
2732 while (h
->root
.type
== bfd_link_hash_indirect
2733 || h
->root
.type
== bfd_link_hash_warning
)
2734 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2736 /* If it was forced local, then clearly it's not dynamic. */
2737 if (h
->dynindx
== -1)
2739 if (h
->forced_local
)
2742 /* Identify the cases where name binding rules say that a
2743 visible symbol resolves locally. */
2744 binding_stays_local_p
= info
->executable
|| SYMBOLIC_BIND (info
, h
);
2746 switch (ELF_ST_VISIBILITY (h
->other
))
2753 hash_table
= elf_hash_table (info
);
2754 if (!is_elf_hash_table (hash_table
))
2757 bed
= get_elf_backend_data (hash_table
->dynobj
);
2759 /* Proper resolution for function pointer equality may require
2760 that these symbols perhaps be resolved dynamically, even though
2761 we should be resolving them to the current module. */
2762 if (!not_local_protected
|| !bed
->is_function_type (h
->type
))
2763 binding_stays_local_p
= TRUE
;
2770 /* If it isn't defined locally, then clearly it's dynamic. */
2771 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2774 /* Otherwise, the symbol is dynamic if binding rules don't tell
2775 us that it remains local. */
2776 return !binding_stays_local_p
;
2779 /* Return true if the symbol referred to by H should be considered
2780 to resolve local to the current module, and false otherwise. Differs
2781 from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of
2782 undefined symbols. The two functions are virtually identical except
2783 for the place where forced_local and dynindx == -1 are tested. If
2784 either of those tests are true, _bfd_elf_dynamic_symbol_p will say
2785 the symbol is local, while _bfd_elf_symbol_refs_local_p will say
2786 the symbol is local only for defined symbols.
2787 It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as
2788 !_bfd_elf_symbol_refs_local_p, except that targets differ in their
2789 treatment of undefined weak symbols. For those that do not make
2790 undefined weak symbols dynamic, both functions may return false. */
2793 _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry
*h
,
2794 struct bfd_link_info
*info
,
2795 bfd_boolean local_protected
)
2797 const struct elf_backend_data
*bed
;
2798 struct elf_link_hash_table
*hash_table
;
2800 /* If it's a local sym, of course we resolve locally. */
2804 /* STV_HIDDEN or STV_INTERNAL ones must be local. */
2805 if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
2806 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
2809 /* Common symbols that become definitions don't get the DEF_REGULAR
2810 flag set, so test it first, and don't bail out. */
2811 if (ELF_COMMON_DEF_P (h
))
2813 /* If we don't have a definition in a regular file, then we can't
2814 resolve locally. The sym is either undefined or dynamic. */
2815 else if (!h
->def_regular
)
2818 /* Forced local symbols resolve locally. */
2819 if (h
->forced_local
)
2822 /* As do non-dynamic symbols. */
2823 if (h
->dynindx
== -1)
2826 /* At this point, we know the symbol is defined and dynamic. In an
2827 executable it must resolve locally, likewise when building symbolic
2828 shared libraries. */
2829 if (info
->executable
|| SYMBOLIC_BIND (info
, h
))
2832 /* Now deal with defined dynamic symbols in shared libraries. Ones
2833 with default visibility might not resolve locally. */
2834 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
2837 hash_table
= elf_hash_table (info
);
2838 if (!is_elf_hash_table (hash_table
))
2841 bed
= get_elf_backend_data (hash_table
->dynobj
);
2843 /* STV_PROTECTED non-function symbols are local. */
2844 if (!bed
->is_function_type (h
->type
))
2847 /* Function pointer equality tests may require that STV_PROTECTED
2848 symbols be treated as dynamic symbols. If the address of a
2849 function not defined in an executable is set to that function's
2850 plt entry in the executable, then the address of the function in
2851 a shared library must also be the plt entry in the executable. */
2852 return local_protected
;
2855 /* Caches some TLS segment info, and ensures that the TLS segment vma is
2856 aligned. Returns the first TLS output section. */
2858 struct bfd_section
*
2859 _bfd_elf_tls_setup (bfd
*obfd
, struct bfd_link_info
*info
)
2861 struct bfd_section
*sec
, *tls
;
2862 unsigned int align
= 0;
2864 for (sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2865 if ((sec
->flags
& SEC_THREAD_LOCAL
) != 0)
2869 for (; sec
!= NULL
&& (sec
->flags
& SEC_THREAD_LOCAL
) != 0; sec
= sec
->next
)
2870 if (sec
->alignment_power
> align
)
2871 align
= sec
->alignment_power
;
2873 elf_hash_table (info
)->tls_sec
= tls
;
2875 /* Ensure the alignment of the first section is the largest alignment,
2876 so that the tls segment starts aligned. */
2878 tls
->alignment_power
= align
;
2883 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
2885 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
2886 Elf_Internal_Sym
*sym
)
2888 const struct elf_backend_data
*bed
;
2890 /* Local symbols do not count, but target specific ones might. */
2891 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
2892 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
2895 bed
= get_elf_backend_data (abfd
);
2896 /* Function symbols do not count. */
2897 if (bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)))
2900 /* If the section is undefined, then so is the symbol. */
2901 if (sym
->st_shndx
== SHN_UNDEF
)
2904 /* If the symbol is defined in the common section, then
2905 it is a common definition and so does not count. */
2906 if (bed
->common_definition (sym
))
2909 /* If the symbol is in a target specific section then we
2910 must rely upon the backend to tell us what it is. */
2911 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
2912 /* FIXME - this function is not coded yet:
2914 return _bfd_is_global_symbol_definition (abfd, sym);
2916 Instead for now assume that the definition is not global,
2917 Even if this is wrong, at least the linker will behave
2918 in the same way that it used to do. */
2924 /* Search the symbol table of the archive element of the archive ABFD
2925 whose archive map contains a mention of SYMDEF, and determine if
2926 the symbol is defined in this element. */
2928 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
2930 Elf_Internal_Shdr
* hdr
;
2931 bfd_size_type symcount
;
2932 bfd_size_type extsymcount
;
2933 bfd_size_type extsymoff
;
2934 Elf_Internal_Sym
*isymbuf
;
2935 Elf_Internal_Sym
*isym
;
2936 Elf_Internal_Sym
*isymend
;
2939 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
2943 if (! bfd_check_format (abfd
, bfd_object
))
2946 /* If we have already included the element containing this symbol in the
2947 link then we do not need to include it again. Just claim that any symbol
2948 it contains is not a definition, so that our caller will not decide to
2949 (re)include this element. */
2950 if (abfd
->archive_pass
)
2953 /* Select the appropriate symbol table. */
2954 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
2955 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2957 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
2959 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
2961 /* The sh_info field of the symtab header tells us where the
2962 external symbols start. We don't care about the local symbols. */
2963 if (elf_bad_symtab (abfd
))
2965 extsymcount
= symcount
;
2970 extsymcount
= symcount
- hdr
->sh_info
;
2971 extsymoff
= hdr
->sh_info
;
2974 if (extsymcount
== 0)
2977 /* Read in the symbol table. */
2978 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
2980 if (isymbuf
== NULL
)
2983 /* Scan the symbol table looking for SYMDEF. */
2985 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
2989 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
2994 if (strcmp (name
, symdef
->name
) == 0)
2996 result
= is_global_data_symbol_definition (abfd
, isym
);
3006 /* Add an entry to the .dynamic table. */
3009 _bfd_elf_add_dynamic_entry (struct bfd_link_info
*info
,
3013 struct elf_link_hash_table
*hash_table
;
3014 const struct elf_backend_data
*bed
;
3016 bfd_size_type newsize
;
3017 bfd_byte
*newcontents
;
3018 Elf_Internal_Dyn dyn
;
3020 hash_table
= elf_hash_table (info
);
3021 if (! is_elf_hash_table (hash_table
))
3024 bed
= get_elf_backend_data (hash_table
->dynobj
);
3025 s
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3026 BFD_ASSERT (s
!= NULL
);
3028 newsize
= s
->size
+ bed
->s
->sizeof_dyn
;
3029 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
3030 if (newcontents
== NULL
)
3034 dyn
.d_un
.d_val
= val
;
3035 bed
->s
->swap_dyn_out (hash_table
->dynobj
, &dyn
, newcontents
+ s
->size
);
3038 s
->contents
= newcontents
;
3043 /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true,
3044 otherwise just check whether one already exists. Returns -1 on error,
3045 1 if a DT_NEEDED tag already exists, and 0 on success. */
3048 elf_add_dt_needed_tag (bfd
*abfd
,
3049 struct bfd_link_info
*info
,
3053 struct elf_link_hash_table
*hash_table
;
3054 bfd_size_type strindex
;
3056 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
3059 hash_table
= elf_hash_table (info
);
3060 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, soname
, FALSE
);
3061 if (strindex
== (bfd_size_type
) -1)
3064 if (_bfd_elf_strtab_refcount (hash_table
->dynstr
, strindex
) != 1)
3067 const struct elf_backend_data
*bed
;
3070 bed
= get_elf_backend_data (hash_table
->dynobj
);
3071 sdyn
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3073 for (extdyn
= sdyn
->contents
;
3074 extdyn
< sdyn
->contents
+ sdyn
->size
;
3075 extdyn
+= bed
->s
->sizeof_dyn
)
3077 Elf_Internal_Dyn dyn
;
3079 bed
->s
->swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3080 if (dyn
.d_tag
== DT_NEEDED
3081 && dyn
.d_un
.d_val
== strindex
)
3083 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3091 if (!_bfd_elf_link_create_dynamic_sections (hash_table
->dynobj
, info
))
3094 if (!_bfd_elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
3098 /* We were just checking for existence of the tag. */
3099 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3105 on_needed_list (const char *soname
, struct bfd_link_needed_list
*needed
)
3107 for (; needed
!= NULL
; needed
= needed
->next
)
3108 if (strcmp (soname
, needed
->name
) == 0)
3114 /* Sort symbol by value, section, and size. */
3116 elf_sort_symbol (const void *arg1
, const void *arg2
)
3118 const struct elf_link_hash_entry
*h1
;
3119 const struct elf_link_hash_entry
*h2
;
3120 bfd_signed_vma vdiff
;
3122 h1
= *(const struct elf_link_hash_entry
**) arg1
;
3123 h2
= *(const struct elf_link_hash_entry
**) arg2
;
3124 vdiff
= h1
->root
.u
.def
.value
- h2
->root
.u
.def
.value
;
3126 return vdiff
> 0 ? 1 : -1;
3129 long sdiff
= h1
->root
.u
.def
.section
->id
- h2
->root
.u
.def
.section
->id
;
3131 return sdiff
> 0 ? 1 : -1;
3133 vdiff
= h1
->size
- h2
->size
;
3134 return vdiff
== 0 ? 0 : vdiff
> 0 ? 1 : -1;
3137 /* This function is used to adjust offsets into .dynstr for
3138 dynamic symbols. This is called via elf_link_hash_traverse. */
3141 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
3143 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3145 if (h
->dynindx
!= -1)
3146 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3150 /* Assign string offsets in .dynstr, update all structures referencing
3154 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
3156 struct elf_link_hash_table
*hash_table
= elf_hash_table (info
);
3157 struct elf_link_local_dynamic_entry
*entry
;
3158 struct elf_strtab_hash
*dynstr
= hash_table
->dynstr
;
3159 bfd
*dynobj
= hash_table
->dynobj
;
3162 const struct elf_backend_data
*bed
;
3165 _bfd_elf_strtab_finalize (dynstr
);
3166 size
= _bfd_elf_strtab_size (dynstr
);
3168 bed
= get_elf_backend_data (dynobj
);
3169 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3170 BFD_ASSERT (sdyn
!= NULL
);
3172 /* Update all .dynamic entries referencing .dynstr strings. */
3173 for (extdyn
= sdyn
->contents
;
3174 extdyn
< sdyn
->contents
+ sdyn
->size
;
3175 extdyn
+= bed
->s
->sizeof_dyn
)
3177 Elf_Internal_Dyn dyn
;
3179 bed
->s
->swap_dyn_in (dynobj
, extdyn
, &dyn
);
3183 dyn
.d_un
.d_val
= size
;
3193 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3198 bed
->s
->swap_dyn_out (dynobj
, &dyn
, extdyn
);
3201 /* Now update local dynamic symbols. */
3202 for (entry
= hash_table
->dynlocal
; entry
; entry
= entry
->next
)
3203 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3204 entry
->isym
.st_name
);
3206 /* And the rest of dynamic symbols. */
3207 elf_link_hash_traverse (hash_table
, elf_adjust_dynstr_offsets
, dynstr
);
3209 /* Adjust version definitions. */
3210 if (elf_tdata (output_bfd
)->cverdefs
)
3215 Elf_Internal_Verdef def
;
3216 Elf_Internal_Verdaux defaux
;
3218 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
3222 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3224 p
+= sizeof (Elf_External_Verdef
);
3225 if (def
.vd_aux
!= sizeof (Elf_External_Verdef
))
3227 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3229 _bfd_elf_swap_verdaux_in (output_bfd
,
3230 (Elf_External_Verdaux
*) p
, &defaux
);
3231 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3233 _bfd_elf_swap_verdaux_out (output_bfd
,
3234 &defaux
, (Elf_External_Verdaux
*) p
);
3235 p
+= sizeof (Elf_External_Verdaux
);
3238 while (def
.vd_next
);
3241 /* Adjust version references. */
3242 if (elf_tdata (output_bfd
)->verref
)
3247 Elf_Internal_Verneed need
;
3248 Elf_Internal_Vernaux needaux
;
3250 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
3254 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3256 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3257 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3258 (Elf_External_Verneed
*) p
);
3259 p
+= sizeof (Elf_External_Verneed
);
3260 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3262 _bfd_elf_swap_vernaux_in (output_bfd
,
3263 (Elf_External_Vernaux
*) p
, &needaux
);
3264 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3266 _bfd_elf_swap_vernaux_out (output_bfd
,
3268 (Elf_External_Vernaux
*) p
);
3269 p
+= sizeof (Elf_External_Vernaux
);
3272 while (need
.vn_next
);
3278 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3279 The default is to only match when the INPUT and OUTPUT are exactly
3283 _bfd_elf_default_relocs_compatible (const bfd_target
*input
,
3284 const bfd_target
*output
)
3286 return input
== output
;
3289 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3290 This version is used when different targets for the same architecture
3291 are virtually identical. */
3294 _bfd_elf_relocs_compatible (const bfd_target
*input
,
3295 const bfd_target
*output
)
3297 const struct elf_backend_data
*obed
, *ibed
;
3299 if (input
== output
)
3302 ibed
= xvec_get_elf_backend_data (input
);
3303 obed
= xvec_get_elf_backend_data (output
);
3305 if (ibed
->arch
!= obed
->arch
)
3308 /* If both backends are using this function, deem them compatible. */
3309 return ibed
->relocs_compatible
== obed
->relocs_compatible
;
3312 /* Add symbols from an ELF object file to the linker hash table. */
3315 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3317 Elf_Internal_Ehdr
*ehdr
;
3318 Elf_Internal_Shdr
*hdr
;
3319 bfd_size_type symcount
;
3320 bfd_size_type extsymcount
;
3321 bfd_size_type extsymoff
;
3322 struct elf_link_hash_entry
**sym_hash
;
3323 bfd_boolean dynamic
;
3324 Elf_External_Versym
*extversym
= NULL
;
3325 Elf_External_Versym
*ever
;
3326 struct elf_link_hash_entry
*weaks
;
3327 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
3328 bfd_size_type nondeflt_vers_cnt
= 0;
3329 Elf_Internal_Sym
*isymbuf
= NULL
;
3330 Elf_Internal_Sym
*isym
;
3331 Elf_Internal_Sym
*isymend
;
3332 const struct elf_backend_data
*bed
;
3333 bfd_boolean add_needed
;
3334 struct elf_link_hash_table
*htab
;
3336 void *alloc_mark
= NULL
;
3337 struct bfd_hash_entry
**old_table
= NULL
;
3338 unsigned int old_size
= 0;
3339 unsigned int old_count
= 0;
3340 void *old_tab
= NULL
;
3342 struct bfd_link_hash_entry
*old_undefs
= NULL
;
3343 struct bfd_link_hash_entry
*old_undefs_tail
= NULL
;
3344 long old_dynsymcount
= 0;
3345 bfd_size_type old_dynstr_size
= 0;
3348 htab
= elf_hash_table (info
);
3349 bed
= get_elf_backend_data (abfd
);
3351 if ((abfd
->flags
& DYNAMIC
) == 0)
3357 /* You can't use -r against a dynamic object. Also, there's no
3358 hope of using a dynamic object which does not exactly match
3359 the format of the output file. */
3360 if (info
->relocatable
3361 || !is_elf_hash_table (htab
)
3362 || info
->output_bfd
->xvec
!= abfd
->xvec
)
3364 if (info
->relocatable
)
3365 bfd_set_error (bfd_error_invalid_operation
);
3367 bfd_set_error (bfd_error_wrong_format
);
3372 ehdr
= elf_elfheader (abfd
);
3373 if (info
->warn_alternate_em
3374 && bed
->elf_machine_code
!= ehdr
->e_machine
3375 && ((bed
->elf_machine_alt1
!= 0
3376 && ehdr
->e_machine
== bed
->elf_machine_alt1
)
3377 || (bed
->elf_machine_alt2
!= 0
3378 && ehdr
->e_machine
== bed
->elf_machine_alt2
)))
3379 info
->callbacks
->einfo
3380 (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"),
3381 ehdr
->e_machine
, abfd
, bed
->elf_machine_code
);
3383 /* As a GNU extension, any input sections which are named
3384 .gnu.warning.SYMBOL are treated as warning symbols for the given
3385 symbol. This differs from .gnu.warning sections, which generate
3386 warnings when they are included in an output file. */
3387 /* PR 12761: Also generate this warning when building shared libraries. */
3388 if (info
->executable
|| info
->shared
)
3392 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3396 name
= bfd_get_section_name (abfd
, s
);
3397 if (CONST_STRNEQ (name
, ".gnu.warning."))
3402 name
+= sizeof ".gnu.warning." - 1;
3404 /* If this is a shared object, then look up the symbol
3405 in the hash table. If it is there, and it is already
3406 been defined, then we will not be using the entry
3407 from this shared object, so we don't need to warn.
3408 FIXME: If we see the definition in a regular object
3409 later on, we will warn, but we shouldn't. The only
3410 fix is to keep track of what warnings we are supposed
3411 to emit, and then handle them all at the end of the
3415 struct elf_link_hash_entry
*h
;
3417 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
3419 /* FIXME: What about bfd_link_hash_common? */
3421 && (h
->root
.type
== bfd_link_hash_defined
3422 || h
->root
.type
== bfd_link_hash_defweak
))
3424 /* We don't want to issue this warning. Clobber
3425 the section size so that the warning does not
3426 get copied into the output file. */
3433 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
3437 if (! bfd_get_section_contents (abfd
, s
, msg
, 0, sz
))
3442 if (! (_bfd_generic_link_add_one_symbol
3443 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
3444 FALSE
, bed
->collect
, NULL
)))
3447 if (! info
->relocatable
)
3449 /* Clobber the section size so that the warning does
3450 not get copied into the output file. */
3453 /* Also set SEC_EXCLUDE, so that symbols defined in
3454 the warning section don't get copied to the output. */
3455 s
->flags
|= SEC_EXCLUDE
;
3464 /* If we are creating a shared library, create all the dynamic
3465 sections immediately. We need to attach them to something,
3466 so we attach them to this BFD, provided it is the right
3467 format. FIXME: If there are no input BFD's of the same
3468 format as the output, we can't make a shared library. */
3470 && is_elf_hash_table (htab
)
3471 && info
->output_bfd
->xvec
== abfd
->xvec
3472 && !htab
->dynamic_sections_created
)
3474 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
3478 else if (!is_elf_hash_table (htab
))
3483 const char *soname
= NULL
;
3485 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
3488 /* ld --just-symbols and dynamic objects don't mix very well.
3489 ld shouldn't allow it. */
3490 if ((s
= abfd
->sections
) != NULL
3491 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3494 /* If this dynamic lib was specified on the command line with
3495 --as-needed in effect, then we don't want to add a DT_NEEDED
3496 tag unless the lib is actually used. Similary for libs brought
3497 in by another lib's DT_NEEDED. When --no-add-needed is used
3498 on a dynamic lib, we don't want to add a DT_NEEDED entry for
3499 any dynamic library in DT_NEEDED tags in the dynamic lib at
3501 add_needed
= (elf_dyn_lib_class (abfd
)
3502 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
3503 | DYN_NO_NEEDED
)) == 0;
3505 s
= bfd_get_section_by_name (abfd
, ".dynamic");
3510 unsigned int elfsec
;
3511 unsigned long shlink
;
3513 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
3520 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
3521 if (elfsec
== SHN_BAD
)
3522 goto error_free_dyn
;
3523 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
3525 for (extdyn
= dynbuf
;
3526 extdyn
< dynbuf
+ s
->size
;
3527 extdyn
+= bed
->s
->sizeof_dyn
)
3529 Elf_Internal_Dyn dyn
;
3531 bed
->s
->swap_dyn_in (abfd
, extdyn
, &dyn
);
3532 if (dyn
.d_tag
== DT_SONAME
)
3534 unsigned int tagv
= dyn
.d_un
.d_val
;
3535 soname
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3537 goto error_free_dyn
;
3539 if (dyn
.d_tag
== DT_NEEDED
)
3541 struct bfd_link_needed_list
*n
, **pn
;
3543 unsigned int tagv
= dyn
.d_un
.d_val
;
3545 amt
= sizeof (struct bfd_link_needed_list
);
3546 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3547 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3548 if (n
== NULL
|| fnm
== NULL
)
3549 goto error_free_dyn
;
3550 amt
= strlen (fnm
) + 1;
3551 anm
= (char *) bfd_alloc (abfd
, amt
);
3553 goto error_free_dyn
;
3554 memcpy (anm
, fnm
, amt
);
3558 for (pn
= &htab
->needed
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3562 if (dyn
.d_tag
== DT_RUNPATH
)
3564 struct bfd_link_needed_list
*n
, **pn
;
3566 unsigned int tagv
= dyn
.d_un
.d_val
;
3568 amt
= sizeof (struct bfd_link_needed_list
);
3569 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3570 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3571 if (n
== NULL
|| fnm
== NULL
)
3572 goto error_free_dyn
;
3573 amt
= strlen (fnm
) + 1;
3574 anm
= (char *) bfd_alloc (abfd
, amt
);
3576 goto error_free_dyn
;
3577 memcpy (anm
, fnm
, amt
);
3581 for (pn
= & runpath
;
3587 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
3588 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
3590 struct bfd_link_needed_list
*n
, **pn
;
3592 unsigned int tagv
= dyn
.d_un
.d_val
;
3594 amt
= sizeof (struct bfd_link_needed_list
);
3595 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3596 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3597 if (n
== NULL
|| fnm
== NULL
)
3598 goto error_free_dyn
;
3599 amt
= strlen (fnm
) + 1;
3600 anm
= (char *) bfd_alloc (abfd
, amt
);
3602 goto error_free_dyn
;
3603 memcpy (anm
, fnm
, amt
);
3613 if (dyn
.d_tag
== DT_AUDIT
)
3615 unsigned int tagv
= dyn
.d_un
.d_val
;
3616 audit
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3623 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
3624 frees all more recently bfd_alloc'd blocks as well. */
3630 struct bfd_link_needed_list
**pn
;
3631 for (pn
= &htab
->runpath
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3636 /* We do not want to include any of the sections in a dynamic
3637 object in the output file. We hack by simply clobbering the
3638 list of sections in the BFD. This could be handled more
3639 cleanly by, say, a new section flag; the existing
3640 SEC_NEVER_LOAD flag is not the one we want, because that one
3641 still implies that the section takes up space in the output
3643 bfd_section_list_clear (abfd
);
3645 /* Find the name to use in a DT_NEEDED entry that refers to this
3646 object. If the object has a DT_SONAME entry, we use it.
3647 Otherwise, if the generic linker stuck something in
3648 elf_dt_name, we use that. Otherwise, we just use the file
3650 if (soname
== NULL
|| *soname
== '\0')
3652 soname
= elf_dt_name (abfd
);
3653 if (soname
== NULL
|| *soname
== '\0')
3654 soname
= bfd_get_filename (abfd
);
3657 /* Save the SONAME because sometimes the linker emulation code
3658 will need to know it. */
3659 elf_dt_name (abfd
) = soname
;
3661 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
3665 /* If we have already included this dynamic object in the
3666 link, just ignore it. There is no reason to include a
3667 particular dynamic object more than once. */
3671 /* Save the DT_AUDIT entry for the linker emulation code. */
3672 elf_dt_audit (abfd
) = audit
;
3675 /* If this is a dynamic object, we always link against the .dynsym
3676 symbol table, not the .symtab symbol table. The dynamic linker
3677 will only see the .dynsym symbol table, so there is no reason to
3678 look at .symtab for a dynamic object. */
3680 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
3681 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3683 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3685 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
3687 /* The sh_info field of the symtab header tells us where the
3688 external symbols start. We don't care about the local symbols at
3690 if (elf_bad_symtab (abfd
))
3692 extsymcount
= symcount
;
3697 extsymcount
= symcount
- hdr
->sh_info
;
3698 extsymoff
= hdr
->sh_info
;
3701 sym_hash
= elf_sym_hashes (abfd
);
3702 if (sym_hash
== NULL
&& extsymcount
!= 0)
3704 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3706 if (isymbuf
== NULL
)
3709 /* We store a pointer to the hash table entry for each external
3711 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
3712 sym_hash
= (struct elf_link_hash_entry
**) bfd_zalloc (abfd
, amt
);
3713 if (sym_hash
== NULL
)
3714 goto error_free_sym
;
3715 elf_sym_hashes (abfd
) = sym_hash
;
3720 /* Read in any version definitions. */
3721 if (!_bfd_elf_slurp_version_tables (abfd
,
3722 info
->default_imported_symver
))
3723 goto error_free_sym
;
3725 /* Read in the symbol versions, but don't bother to convert them
3726 to internal format. */
3727 if (elf_dynversym (abfd
) != 0)
3729 Elf_Internal_Shdr
*versymhdr
;
3731 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
3732 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
3733 if (extversym
== NULL
)
3734 goto error_free_sym
;
3735 amt
= versymhdr
->sh_size
;
3736 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
3737 || bfd_bread (extversym
, amt
, abfd
) != amt
)
3738 goto error_free_vers
;
3742 /* If we are loading an as-needed shared lib, save the symbol table
3743 state before we start adding symbols. If the lib turns out
3744 to be unneeded, restore the state. */
3745 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
3750 for (entsize
= 0, i
= 0; i
< htab
->root
.table
.size
; i
++)
3752 struct bfd_hash_entry
*p
;
3753 struct elf_link_hash_entry
*h
;
3755 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3757 h
= (struct elf_link_hash_entry
*) p
;
3758 entsize
+= htab
->root
.table
.entsize
;
3759 if (h
->root
.type
== bfd_link_hash_warning
)
3760 entsize
+= htab
->root
.table
.entsize
;
3764 tabsize
= htab
->root
.table
.size
* sizeof (struct bfd_hash_entry
*);
3765 old_tab
= bfd_malloc (tabsize
+ entsize
);
3766 if (old_tab
== NULL
)
3767 goto error_free_vers
;
3769 /* Remember the current objalloc pointer, so that all mem for
3770 symbols added can later be reclaimed. */
3771 alloc_mark
= bfd_hash_allocate (&htab
->root
.table
, 1);
3772 if (alloc_mark
== NULL
)
3773 goto error_free_vers
;
3775 /* Make a special call to the linker "notice" function to
3776 tell it that we are about to handle an as-needed lib. */
3777 if (!(*info
->callbacks
->notice
) (info
, NULL
, abfd
, NULL
,
3778 notice_as_needed
, 0, NULL
))
3779 goto error_free_vers
;
3781 /* Clone the symbol table. Remember some pointers into the
3782 symbol table, and dynamic symbol count. */
3783 old_ent
= (char *) old_tab
+ tabsize
;
3784 memcpy (old_tab
, htab
->root
.table
.table
, tabsize
);
3785 old_undefs
= htab
->root
.undefs
;
3786 old_undefs_tail
= htab
->root
.undefs_tail
;
3787 old_table
= htab
->root
.table
.table
;
3788 old_size
= htab
->root
.table
.size
;
3789 old_count
= htab
->root
.table
.count
;
3790 old_dynsymcount
= htab
->dynsymcount
;
3791 old_dynstr_size
= _bfd_elf_strtab_size (htab
->dynstr
);
3793 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
3795 struct bfd_hash_entry
*p
;
3796 struct elf_link_hash_entry
*h
;
3798 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3800 memcpy (old_ent
, p
, htab
->root
.table
.entsize
);
3801 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3802 h
= (struct elf_link_hash_entry
*) p
;
3803 if (h
->root
.type
== bfd_link_hash_warning
)
3805 memcpy (old_ent
, h
->root
.u
.i
.link
, htab
->root
.table
.entsize
);
3806 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3813 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
3814 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
3816 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
3820 asection
*sec
, *new_sec
;
3823 struct elf_link_hash_entry
*h
;
3824 struct elf_link_hash_entry
*hi
;
3825 bfd_boolean definition
;
3826 bfd_boolean size_change_ok
;
3827 bfd_boolean type_change_ok
;
3828 bfd_boolean new_weakdef
;
3829 bfd_boolean new_weak
;
3830 bfd_boolean old_weak
;
3831 bfd_boolean override
;
3833 unsigned int old_alignment
;
3838 flags
= BSF_NO_FLAGS
;
3840 value
= isym
->st_value
;
3841 common
= bed
->common_definition (isym
);
3843 bind
= ELF_ST_BIND (isym
->st_info
);
3847 /* This should be impossible, since ELF requires that all
3848 global symbols follow all local symbols, and that sh_info
3849 point to the first global symbol. Unfortunately, Irix 5
3854 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
3862 case STB_GNU_UNIQUE
:
3863 flags
= BSF_GNU_UNIQUE
;
3867 /* Leave it up to the processor backend. */
3871 if (isym
->st_shndx
== SHN_UNDEF
)
3872 sec
= bfd_und_section_ptr
;
3873 else if (isym
->st_shndx
== SHN_ABS
)
3874 sec
= bfd_abs_section_ptr
;
3875 else if (isym
->st_shndx
== SHN_COMMON
)
3877 sec
= bfd_com_section_ptr
;
3878 /* What ELF calls the size we call the value. What ELF
3879 calls the value we call the alignment. */
3880 value
= isym
->st_size
;
3884 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3886 sec
= bfd_abs_section_ptr
;
3887 else if (discarded_section (sec
))
3889 /* Symbols from discarded section are undefined. We keep
3891 sec
= bfd_und_section_ptr
;
3892 isym
->st_shndx
= SHN_UNDEF
;
3894 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
3898 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3901 goto error_free_vers
;
3903 if (isym
->st_shndx
== SHN_COMMON
3904 && (abfd
->flags
& BFD_PLUGIN
) != 0)
3906 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
3910 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
3912 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
3914 goto error_free_vers
;
3918 else if (isym
->st_shndx
== SHN_COMMON
3919 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
3920 && !info
->relocatable
)
3922 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
3926 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
3927 | SEC_LINKER_CREATED
);
3928 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
3930 goto error_free_vers
;
3934 else if (bed
->elf_add_symbol_hook
)
3936 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
3938 goto error_free_vers
;
3940 /* The hook function sets the name to NULL if this symbol
3941 should be skipped for some reason. */
3946 /* Sanity check that all possibilities were handled. */
3949 bfd_set_error (bfd_error_bad_value
);
3950 goto error_free_vers
;
3953 /* Silently discard TLS symbols from --just-syms. There's
3954 no way to combine a static TLS block with a new TLS block
3955 for this executable. */
3956 if (ELF_ST_TYPE (isym
->st_info
) == STT_TLS
3957 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3960 if (bfd_is_und_section (sec
)
3961 || bfd_is_com_section (sec
))
3966 size_change_ok
= FALSE
;
3967 type_change_ok
= bed
->type_change_ok
;
3973 if (is_elf_hash_table (htab
))
3975 Elf_Internal_Versym iver
;
3976 unsigned int vernum
= 0;
3981 if (info
->default_imported_symver
)
3982 /* Use the default symbol version created earlier. */
3983 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
3988 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
3990 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
3992 /* If this is a hidden symbol, or if it is not version
3993 1, we append the version name to the symbol name.
3994 However, we do not modify a non-hidden absolute symbol
3995 if it is not a function, because it might be the version
3996 symbol itself. FIXME: What if it isn't? */
3997 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
3999 && (!bfd_is_abs_section (sec
)
4000 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4003 size_t namelen
, verlen
, newlen
;
4006 if (isym
->st_shndx
!= SHN_UNDEF
)
4008 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4010 else if (vernum
> 1)
4012 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4018 (*_bfd_error_handler
)
4019 (_("%B: %s: invalid version %u (max %d)"),
4021 elf_tdata (abfd
)->cverdefs
);
4022 bfd_set_error (bfd_error_bad_value
);
4023 goto error_free_vers
;
4028 /* We cannot simply test for the number of
4029 entries in the VERNEED section since the
4030 numbers for the needed versions do not start
4032 Elf_Internal_Verneed
*t
;
4035 for (t
= elf_tdata (abfd
)->verref
;
4039 Elf_Internal_Vernaux
*a
;
4041 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4043 if (a
->vna_other
== vernum
)
4045 verstr
= a
->vna_nodename
;
4054 (*_bfd_error_handler
)
4055 (_("%B: %s: invalid needed version %d"),
4056 abfd
, name
, vernum
);
4057 bfd_set_error (bfd_error_bad_value
);
4058 goto error_free_vers
;
4062 namelen
= strlen (name
);
4063 verlen
= strlen (verstr
);
4064 newlen
= namelen
+ verlen
+ 2;
4065 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4066 && isym
->st_shndx
!= SHN_UNDEF
)
4069 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4070 if (newname
== NULL
)
4071 goto error_free_vers
;
4072 memcpy (newname
, name
, namelen
);
4073 p
= newname
+ namelen
;
4075 /* If this is a defined non-hidden version symbol,
4076 we add another @ to the name. This indicates the
4077 default version of the symbol. */
4078 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4079 && isym
->st_shndx
!= SHN_UNDEF
)
4081 memcpy (p
, verstr
, verlen
+ 1);
4086 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
4087 sym_hash
, &old_bfd
, &old_weak
,
4088 &old_alignment
, &skip
, &override
,
4089 &type_change_ok
, &size_change_ok
))
4090 goto error_free_vers
;
4099 while (h
->root
.type
== bfd_link_hash_indirect
4100 || h
->root
.type
== bfd_link_hash_warning
)
4101 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4103 if (elf_tdata (abfd
)->verdef
!= NULL
4106 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4109 if (! (_bfd_generic_link_add_one_symbol
4110 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, bed
->collect
,
4111 (struct bfd_link_hash_entry
**) sym_hash
)))
4112 goto error_free_vers
;
4115 /* We need to make sure that indirect symbol dynamic flags are
4118 while (h
->root
.type
== bfd_link_hash_indirect
4119 || h
->root
.type
== bfd_link_hash_warning
)
4120 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4124 new_weak
= (flags
& BSF_WEAK
) != 0;
4125 new_weakdef
= FALSE
;
4129 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4130 && is_elf_hash_table (htab
)
4131 && h
->u
.weakdef
== NULL
)
4133 /* Keep a list of all weak defined non function symbols from
4134 a dynamic object, using the weakdef field. Later in this
4135 function we will set the weakdef field to the correct
4136 value. We only put non-function symbols from dynamic
4137 objects on this list, because that happens to be the only
4138 time we need to know the normal symbol corresponding to a
4139 weak symbol, and the information is time consuming to
4140 figure out. If the weakdef field is not already NULL,
4141 then this symbol was already defined by some previous
4142 dynamic object, and we will be using that previous
4143 definition anyhow. */
4145 h
->u
.weakdef
= weaks
;
4150 /* Set the alignment of a common symbol. */
4151 if ((common
|| bfd_is_com_section (sec
))
4152 && h
->root
.type
== bfd_link_hash_common
)
4157 align
= bfd_log2 (isym
->st_value
);
4160 /* The new symbol is a common symbol in a shared object.
4161 We need to get the alignment from the section. */
4162 align
= new_sec
->alignment_power
;
4164 if (align
> old_alignment
)
4165 h
->root
.u
.c
.p
->alignment_power
= align
;
4167 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
4170 if (is_elf_hash_table (htab
))
4172 /* Set a flag in the hash table entry indicating the type of
4173 reference or definition we just found. A dynamic symbol
4174 is one which is referenced or defined by both a regular
4175 object and a shared object. */
4176 bfd_boolean dynsym
= FALSE
;
4178 /* Plugin symbols aren't normal. Don't set def_regular or
4179 ref_regular for them, or make them dynamic. */
4180 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4187 if (bind
!= STB_WEAK
)
4188 h
->ref_regular_nonweak
= 1;
4200 /* If the indirect symbol has been forced local, don't
4201 make the real symbol dynamic. */
4202 if ((h
== hi
|| !hi
->forced_local
)
4203 && (! info
->executable
4213 hi
->ref_dynamic
= 1;
4218 hi
->def_dynamic
= 1;
4221 /* If the indirect symbol has been forced local, don't
4222 make the real symbol dynamic. */
4223 if ((h
== hi
|| !hi
->forced_local
)
4226 || (h
->u
.weakdef
!= NULL
4228 && h
->u
.weakdef
->dynindx
!= -1)))
4232 /* Check to see if we need to add an indirect symbol for
4233 the default name. */
4235 || (!override
&& h
->root
.type
== bfd_link_hash_common
))
4236 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
4237 sec
, value
, &old_bfd
, &dynsym
))
4238 goto error_free_vers
;
4240 /* Check the alignment when a common symbol is involved. This
4241 can change when a common symbol is overridden by a normal
4242 definition or a common symbol is ignored due to the old
4243 normal definition. We need to make sure the maximum
4244 alignment is maintained. */
4245 if ((old_alignment
|| common
)
4246 && h
->root
.type
!= bfd_link_hash_common
)
4248 unsigned int common_align
;
4249 unsigned int normal_align
;
4250 unsigned int symbol_align
;
4254 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
4255 || h
->root
.type
== bfd_link_hash_defweak
);
4257 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
4258 if (h
->root
.u
.def
.section
->owner
!= NULL
4259 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
4261 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
4262 if (normal_align
> symbol_align
)
4263 normal_align
= symbol_align
;
4266 normal_align
= symbol_align
;
4270 common_align
= old_alignment
;
4271 common_bfd
= old_bfd
;
4276 common_align
= bfd_log2 (isym
->st_value
);
4278 normal_bfd
= old_bfd
;
4281 if (normal_align
< common_align
)
4283 /* PR binutils/2735 */
4284 if (normal_bfd
== NULL
)
4285 (*_bfd_error_handler
)
4286 (_("Warning: alignment %u of common symbol `%s' in %B is"
4287 " greater than the alignment (%u) of its section %A"),
4288 common_bfd
, h
->root
.u
.def
.section
,
4289 1 << common_align
, name
, 1 << normal_align
);
4291 (*_bfd_error_handler
)
4292 (_("Warning: alignment %u of symbol `%s' in %B"
4293 " is smaller than %u in %B"),
4294 normal_bfd
, common_bfd
,
4295 1 << normal_align
, name
, 1 << common_align
);
4299 /* Remember the symbol size if it isn't undefined. */
4300 if (isym
->st_size
!= 0
4301 && isym
->st_shndx
!= SHN_UNDEF
4302 && (definition
|| h
->size
== 0))
4305 && h
->size
!= isym
->st_size
4306 && ! size_change_ok
)
4307 (*_bfd_error_handler
)
4308 (_("Warning: size of symbol `%s' changed"
4309 " from %lu in %B to %lu in %B"),
4311 name
, (unsigned long) h
->size
,
4312 (unsigned long) isym
->st_size
);
4314 h
->size
= isym
->st_size
;
4317 /* If this is a common symbol, then we always want H->SIZE
4318 to be the size of the common symbol. The code just above
4319 won't fix the size if a common symbol becomes larger. We
4320 don't warn about a size change here, because that is
4321 covered by --warn-common. Allow changes between different
4323 if (h
->root
.type
== bfd_link_hash_common
)
4324 h
->size
= h
->root
.u
.c
.size
;
4326 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
4327 && ((definition
&& !new_weak
)
4328 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
4329 || h
->type
== STT_NOTYPE
))
4331 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
4333 /* Turn an IFUNC symbol from a DSO into a normal FUNC
4335 if (type
== STT_GNU_IFUNC
4336 && (abfd
->flags
& DYNAMIC
) != 0)
4339 if (h
->type
!= type
)
4341 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
4342 (*_bfd_error_handler
)
4343 (_("Warning: type of symbol `%s' changed"
4344 " from %d to %d in %B"),
4345 abfd
, name
, h
->type
, type
);
4351 /* Merge st_other field. */
4352 elf_merge_st_other (abfd
, h
, isym
, definition
, dynamic
);
4354 /* We don't want to make debug symbol dynamic. */
4355 if (definition
&& (sec
->flags
& SEC_DEBUGGING
) && !info
->relocatable
)
4358 /* Nor should we make plugin symbols dynamic. */
4359 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4364 h
->target_internal
= isym
->st_target_internal
;
4365 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
4368 if (definition
&& !dynamic
)
4370 char *p
= strchr (name
, ELF_VER_CHR
);
4371 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
4373 /* Queue non-default versions so that .symver x, x@FOO
4374 aliases can be checked. */
4377 amt
= ((isymend
- isym
+ 1)
4378 * sizeof (struct elf_link_hash_entry
*));
4380 (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4382 goto error_free_vers
;
4384 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
4388 if (dynsym
&& h
->dynindx
== -1)
4390 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4391 goto error_free_vers
;
4392 if (h
->u
.weakdef
!= NULL
4394 && h
->u
.weakdef
->dynindx
== -1)
4396 if (!bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
4397 goto error_free_vers
;
4400 else if (dynsym
&& h
->dynindx
!= -1)
4401 /* If the symbol already has a dynamic index, but
4402 visibility says it should not be visible, turn it into
4404 switch (ELF_ST_VISIBILITY (h
->other
))
4408 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4413 /* Don't add DT_NEEDED for references from the dummy bfd. */
4417 && h
->ref_regular_nonweak
4419 || (old_bfd
->flags
& BFD_PLUGIN
) == 0))
4420 || (h
->ref_dynamic_nonweak
4421 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
4422 && !on_needed_list (elf_dt_name (abfd
), htab
->needed
))))
4425 const char *soname
= elf_dt_name (abfd
);
4427 /* A symbol from a library loaded via DT_NEEDED of some
4428 other library is referenced by a regular object.
4429 Add a DT_NEEDED entry for it. Issue an error if
4430 --no-add-needed is used and the reference was not
4433 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
4435 (*_bfd_error_handler
)
4436 (_("%B: undefined reference to symbol '%s'"),
4438 bfd_set_error (bfd_error_missing_dso
);
4439 goto error_free_vers
;
4442 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
4443 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
4446 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
4448 goto error_free_vers
;
4450 BFD_ASSERT (ret
== 0);
4455 if (extversym
!= NULL
)
4461 if (isymbuf
!= NULL
)
4467 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4471 /* Restore the symbol table. */
4472 if (bed
->as_needed_cleanup
)
4473 (*bed
->as_needed_cleanup
) (abfd
, info
);
4474 old_ent
= (char *) old_tab
+ tabsize
;
4475 memset (elf_sym_hashes (abfd
), 0,
4476 extsymcount
* sizeof (struct elf_link_hash_entry
*));
4477 htab
->root
.table
.table
= old_table
;
4478 htab
->root
.table
.size
= old_size
;
4479 htab
->root
.table
.count
= old_count
;
4480 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
4481 htab
->root
.undefs
= old_undefs
;
4482 htab
->root
.undefs_tail
= old_undefs_tail
;
4483 _bfd_elf_strtab_restore_size (htab
->dynstr
, old_dynstr_size
);
4484 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4486 struct bfd_hash_entry
*p
;
4487 struct elf_link_hash_entry
*h
;
4489 unsigned int alignment_power
;
4491 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4493 h
= (struct elf_link_hash_entry
*) p
;
4494 if (h
->root
.type
== bfd_link_hash_warning
)
4495 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4496 if (h
->dynindx
>= old_dynsymcount
4497 && h
->dynstr_index
< old_dynstr_size
)
4498 _bfd_elf_strtab_delref (htab
->dynstr
, h
->dynstr_index
);
4500 /* Preserve the maximum alignment and size for common
4501 symbols even if this dynamic lib isn't on DT_NEEDED
4502 since it can still be loaded at run time by another
4504 if (h
->root
.type
== bfd_link_hash_common
)
4506 size
= h
->root
.u
.c
.size
;
4507 alignment_power
= h
->root
.u
.c
.p
->alignment_power
;
4512 alignment_power
= 0;
4514 memcpy (p
, old_ent
, htab
->root
.table
.entsize
);
4515 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4516 h
= (struct elf_link_hash_entry
*) p
;
4517 if (h
->root
.type
== bfd_link_hash_warning
)
4519 memcpy (h
->root
.u
.i
.link
, old_ent
, htab
->root
.table
.entsize
);
4520 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4521 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4523 if (h
->root
.type
== bfd_link_hash_common
)
4525 if (size
> h
->root
.u
.c
.size
)
4526 h
->root
.u
.c
.size
= size
;
4527 if (alignment_power
> h
->root
.u
.c
.p
->alignment_power
)
4528 h
->root
.u
.c
.p
->alignment_power
= alignment_power
;
4533 /* Make a special call to the linker "notice" function to
4534 tell it that symbols added for crefs may need to be removed. */
4535 if (!(*info
->callbacks
->notice
) (info
, NULL
, abfd
, NULL
,
4536 notice_not_needed
, 0, NULL
))
4537 goto error_free_vers
;
4540 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
4542 if (nondeflt_vers
!= NULL
)
4543 free (nondeflt_vers
);
4547 if (old_tab
!= NULL
)
4549 if (!(*info
->callbacks
->notice
) (info
, NULL
, abfd
, NULL
,
4550 notice_needed
, 0, NULL
))
4551 goto error_free_vers
;
4556 /* Now that all the symbols from this input file are created, handle
4557 .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */
4558 if (nondeflt_vers
!= NULL
)
4560 bfd_size_type cnt
, symidx
;
4562 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
4564 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
4565 char *shortname
, *p
;
4567 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
4569 || (h
->root
.type
!= bfd_link_hash_defined
4570 && h
->root
.type
!= bfd_link_hash_defweak
))
4573 amt
= p
- h
->root
.root
.string
;
4574 shortname
= (char *) bfd_malloc (amt
+ 1);
4576 goto error_free_vers
;
4577 memcpy (shortname
, h
->root
.root
.string
, amt
);
4578 shortname
[amt
] = '\0';
4580 hi
= (struct elf_link_hash_entry
*)
4581 bfd_link_hash_lookup (&htab
->root
, shortname
,
4582 FALSE
, FALSE
, FALSE
);
4584 && hi
->root
.type
== h
->root
.type
4585 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
4586 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
4588 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
4589 hi
->root
.type
= bfd_link_hash_indirect
;
4590 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
4591 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
4592 sym_hash
= elf_sym_hashes (abfd
);
4594 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
4595 if (sym_hash
[symidx
] == hi
)
4597 sym_hash
[symidx
] = h
;
4603 free (nondeflt_vers
);
4604 nondeflt_vers
= NULL
;
4607 /* Now set the weakdefs field correctly for all the weak defined
4608 symbols we found. The only way to do this is to search all the
4609 symbols. Since we only need the information for non functions in
4610 dynamic objects, that's the only time we actually put anything on
4611 the list WEAKS. We need this information so that if a regular
4612 object refers to a symbol defined weakly in a dynamic object, the
4613 real symbol in the dynamic object is also put in the dynamic
4614 symbols; we also must arrange for both symbols to point to the
4615 same memory location. We could handle the general case of symbol
4616 aliasing, but a general symbol alias can only be generated in
4617 assembler code, handling it correctly would be very time
4618 consuming, and other ELF linkers don't handle general aliasing
4622 struct elf_link_hash_entry
**hpp
;
4623 struct elf_link_hash_entry
**hppend
;
4624 struct elf_link_hash_entry
**sorted_sym_hash
;
4625 struct elf_link_hash_entry
*h
;
4628 /* Since we have to search the whole symbol list for each weak
4629 defined symbol, search time for N weak defined symbols will be
4630 O(N^2). Binary search will cut it down to O(NlogN). */
4631 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
4632 sorted_sym_hash
= (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4633 if (sorted_sym_hash
== NULL
)
4635 sym_hash
= sorted_sym_hash
;
4636 hpp
= elf_sym_hashes (abfd
);
4637 hppend
= hpp
+ extsymcount
;
4639 for (; hpp
< hppend
; hpp
++)
4643 && h
->root
.type
== bfd_link_hash_defined
4644 && !bed
->is_function_type (h
->type
))
4652 qsort (sorted_sym_hash
, sym_count
,
4653 sizeof (struct elf_link_hash_entry
*),
4656 while (weaks
!= NULL
)
4658 struct elf_link_hash_entry
*hlook
;
4661 size_t i
, j
, idx
= 0;
4664 weaks
= hlook
->u
.weakdef
;
4665 hlook
->u
.weakdef
= NULL
;
4667 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
4668 || hlook
->root
.type
== bfd_link_hash_defweak
4669 || hlook
->root
.type
== bfd_link_hash_common
4670 || hlook
->root
.type
== bfd_link_hash_indirect
);
4671 slook
= hlook
->root
.u
.def
.section
;
4672 vlook
= hlook
->root
.u
.def
.value
;
4678 bfd_signed_vma vdiff
;
4680 h
= sorted_sym_hash
[idx
];
4681 vdiff
= vlook
- h
->root
.u
.def
.value
;
4688 long sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
4698 /* We didn't find a value/section match. */
4702 /* With multiple aliases, or when the weak symbol is already
4703 strongly defined, we have multiple matching symbols and
4704 the binary search above may land on any of them. Step
4705 one past the matching symbol(s). */
4708 h
= sorted_sym_hash
[idx
];
4709 if (h
->root
.u
.def
.section
!= slook
4710 || h
->root
.u
.def
.value
!= vlook
)
4714 /* Now look back over the aliases. Since we sorted by size
4715 as well as value and section, we'll choose the one with
4716 the largest size. */
4719 h
= sorted_sym_hash
[idx
];
4721 /* Stop if value or section doesn't match. */
4722 if (h
->root
.u
.def
.section
!= slook
4723 || h
->root
.u
.def
.value
!= vlook
)
4725 else if (h
!= hlook
)
4727 hlook
->u
.weakdef
= h
;
4729 /* If the weak definition is in the list of dynamic
4730 symbols, make sure the real definition is put
4732 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
4734 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4737 free (sorted_sym_hash
);
4742 /* If the real definition is in the list of dynamic
4743 symbols, make sure the weak definition is put
4744 there as well. If we don't do this, then the
4745 dynamic loader might not merge the entries for the
4746 real definition and the weak definition. */
4747 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
4749 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
4750 goto err_free_sym_hash
;
4757 free (sorted_sym_hash
);
4760 if (bed
->check_directives
4761 && !(*bed
->check_directives
) (abfd
, info
))
4764 /* If this object is the same format as the output object, and it is
4765 not a shared library, then let the backend look through the
4768 This is required to build global offset table entries and to
4769 arrange for dynamic relocs. It is not required for the
4770 particular common case of linking non PIC code, even when linking
4771 against shared libraries, but unfortunately there is no way of
4772 knowing whether an object file has been compiled PIC or not.
4773 Looking through the relocs is not particularly time consuming.
4774 The problem is that we must either (1) keep the relocs in memory,
4775 which causes the linker to require additional runtime memory or
4776 (2) read the relocs twice from the input file, which wastes time.
4777 This would be a good case for using mmap.
4779 I have no idea how to handle linking PIC code into a file of a
4780 different format. It probably can't be done. */
4782 && is_elf_hash_table (htab
)
4783 && bed
->check_relocs
!= NULL
4784 && elf_object_id (abfd
) == elf_hash_table_id (htab
)
4785 && (*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
4789 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4791 Elf_Internal_Rela
*internal_relocs
;
4794 if ((o
->flags
& SEC_RELOC
) == 0
4795 || o
->reloc_count
== 0
4796 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
4797 && (o
->flags
& SEC_DEBUGGING
) != 0)
4798 || bfd_is_abs_section (o
->output_section
))
4801 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
4803 if (internal_relocs
== NULL
)
4806 ok
= (*bed
->check_relocs
) (abfd
, info
, o
, internal_relocs
);
4808 if (elf_section_data (o
)->relocs
!= internal_relocs
)
4809 free (internal_relocs
);
4816 /* If this is a non-traditional link, try to optimize the handling
4817 of the .stab/.stabstr sections. */
4819 && ! info
->traditional_format
4820 && is_elf_hash_table (htab
)
4821 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
4825 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
4826 if (stabstr
!= NULL
)
4828 bfd_size_type string_offset
= 0;
4831 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
4832 if (CONST_STRNEQ (stab
->name
, ".stab")
4833 && (!stab
->name
[5] ||
4834 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
4835 && (stab
->flags
& SEC_MERGE
) == 0
4836 && !bfd_is_abs_section (stab
->output_section
))
4838 struct bfd_elf_section_data
*secdata
;
4840 secdata
= elf_section_data (stab
);
4841 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
4842 stabstr
, &secdata
->sec_info
,
4845 if (secdata
->sec_info
)
4846 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
4851 if (is_elf_hash_table (htab
) && add_needed
)
4853 /* Add this bfd to the loaded list. */
4854 struct elf_link_loaded_list
*n
;
4856 n
= (struct elf_link_loaded_list
*)
4857 bfd_alloc (abfd
, sizeof (struct elf_link_loaded_list
));
4861 n
->next
= htab
->loaded
;
4868 if (old_tab
!= NULL
)
4870 if (nondeflt_vers
!= NULL
)
4871 free (nondeflt_vers
);
4872 if (extversym
!= NULL
)
4875 if (isymbuf
!= NULL
)
4881 /* Return the linker hash table entry of a symbol that might be
4882 satisfied by an archive symbol. Return -1 on error. */
4884 struct elf_link_hash_entry
*
4885 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
4886 struct bfd_link_info
*info
,
4889 struct elf_link_hash_entry
*h
;
4893 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
4897 /* If this is a default version (the name contains @@), look up the
4898 symbol again with only one `@' as well as without the version.
4899 The effect is that references to the symbol with and without the
4900 version will be matched by the default symbol in the archive. */
4902 p
= strchr (name
, ELF_VER_CHR
);
4903 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
4906 /* First check with only one `@'. */
4907 len
= strlen (name
);
4908 copy
= (char *) bfd_alloc (abfd
, len
);
4910 return (struct elf_link_hash_entry
*) 0 - 1;
4912 first
= p
- name
+ 1;
4913 memcpy (copy
, name
, first
);
4914 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
4916 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
4919 /* We also need to check references to the symbol without the
4921 copy
[first
- 1] = '\0';
4922 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
4923 FALSE
, FALSE
, TRUE
);
4926 bfd_release (abfd
, copy
);
4930 /* Add symbols from an ELF archive file to the linker hash table. We
4931 don't use _bfd_generic_link_add_archive_symbols because of a
4932 problem which arises on UnixWare. The UnixWare libc.so is an
4933 archive which includes an entry libc.so.1 which defines a bunch of
4934 symbols. The libc.so archive also includes a number of other
4935 object files, which also define symbols, some of which are the same
4936 as those defined in libc.so.1. Correct linking requires that we
4937 consider each object file in turn, and include it if it defines any
4938 symbols we need. _bfd_generic_link_add_archive_symbols does not do
4939 this; it looks through the list of undefined symbols, and includes
4940 any object file which defines them. When this algorithm is used on
4941 UnixWare, it winds up pulling in libc.so.1 early and defining a
4942 bunch of symbols. This means that some of the other objects in the
4943 archive are not included in the link, which is incorrect since they
4944 precede libc.so.1 in the archive.
4946 Fortunately, ELF archive handling is simpler than that done by
4947 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
4948 oddities. In ELF, if we find a symbol in the archive map, and the
4949 symbol is currently undefined, we know that we must pull in that
4952 Unfortunately, we do have to make multiple passes over the symbol
4953 table until nothing further is resolved. */
4956 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
4959 bfd_boolean
*defined
= NULL
;
4960 bfd_boolean
*included
= NULL
;
4964 const struct elf_backend_data
*bed
;
4965 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
4966 (bfd
*, struct bfd_link_info
*, const char *);
4968 if (! bfd_has_map (abfd
))
4970 /* An empty archive is a special case. */
4971 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
4973 bfd_set_error (bfd_error_no_armap
);
4977 /* Keep track of all symbols we know to be already defined, and all
4978 files we know to be already included. This is to speed up the
4979 second and subsequent passes. */
4980 c
= bfd_ardata (abfd
)->symdef_count
;
4984 amt
*= sizeof (bfd_boolean
);
4985 defined
= (bfd_boolean
*) bfd_zmalloc (amt
);
4986 included
= (bfd_boolean
*) bfd_zmalloc (amt
);
4987 if (defined
== NULL
|| included
== NULL
)
4990 symdefs
= bfd_ardata (abfd
)->symdefs
;
4991 bed
= get_elf_backend_data (abfd
);
4992 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5005 symdefend
= symdef
+ c
;
5006 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5008 struct elf_link_hash_entry
*h
;
5010 struct bfd_link_hash_entry
*undefs_tail
;
5013 if (defined
[i
] || included
[i
])
5015 if (symdef
->file_offset
== last
)
5021 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5022 if (h
== (struct elf_link_hash_entry
*) 0 - 1)
5028 if (h
->root
.type
== bfd_link_hash_common
)
5030 /* We currently have a common symbol. The archive map contains
5031 a reference to this symbol, so we may want to include it. We
5032 only want to include it however, if this archive element
5033 contains a definition of the symbol, not just another common
5036 Unfortunately some archivers (including GNU ar) will put
5037 declarations of common symbols into their archive maps, as
5038 well as real definitions, so we cannot just go by the archive
5039 map alone. Instead we must read in the element's symbol
5040 table and check that to see what kind of symbol definition
5042 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5045 else if (h
->root
.type
!= bfd_link_hash_undefined
)
5047 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5052 /* We need to include this archive member. */
5053 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5054 if (element
== NULL
)
5057 if (! bfd_check_format (element
, bfd_object
))
5060 /* Doublecheck that we have not included this object
5061 already--it should be impossible, but there may be
5062 something wrong with the archive. */
5063 if (element
->archive_pass
!= 0)
5065 bfd_set_error (bfd_error_bad_value
);
5068 element
->archive_pass
= 1;
5070 undefs_tail
= info
->hash
->undefs_tail
;
5072 if (!(*info
->callbacks
5073 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5075 if (!bfd_link_add_symbols (element
, info
))
5078 /* If there are any new undefined symbols, we need to make
5079 another pass through the archive in order to see whether
5080 they can be defined. FIXME: This isn't perfect, because
5081 common symbols wind up on undefs_tail and because an
5082 undefined symbol which is defined later on in this pass
5083 does not require another pass. This isn't a bug, but it
5084 does make the code less efficient than it could be. */
5085 if (undefs_tail
!= info
->hash
->undefs_tail
)
5088 /* Look backward to mark all symbols from this object file
5089 which we have already seen in this pass. */
5093 included
[mark
] = TRUE
;
5098 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5100 /* We mark subsequent symbols from this object file as we go
5101 on through the loop. */
5102 last
= symdef
->file_offset
;
5113 if (defined
!= NULL
)
5115 if (included
!= NULL
)
5120 /* Given an ELF BFD, add symbols to the global hash table as
5124 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5126 switch (bfd_get_format (abfd
))
5129 return elf_link_add_object_symbols (abfd
, info
);
5131 return elf_link_add_archive_symbols (abfd
, info
);
5133 bfd_set_error (bfd_error_wrong_format
);
5138 struct hash_codes_info
5140 unsigned long *hashcodes
;
5144 /* This function will be called though elf_link_hash_traverse to store
5145 all hash value of the exported symbols in an array. */
5148 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5150 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5156 /* Ignore indirect symbols. These are added by the versioning code. */
5157 if (h
->dynindx
== -1)
5160 name
= h
->root
.root
.string
;
5161 p
= strchr (name
, ELF_VER_CHR
);
5164 alc
= (char *) bfd_malloc (p
- name
+ 1);
5170 memcpy (alc
, name
, p
- name
);
5171 alc
[p
- name
] = '\0';
5175 /* Compute the hash value. */
5176 ha
= bfd_elf_hash (name
);
5178 /* Store the found hash value in the array given as the argument. */
5179 *(inf
->hashcodes
)++ = ha
;
5181 /* And store it in the struct so that we can put it in the hash table
5183 h
->u
.elf_hash_value
= ha
;
5191 struct collect_gnu_hash_codes
5194 const struct elf_backend_data
*bed
;
5195 unsigned long int nsyms
;
5196 unsigned long int maskbits
;
5197 unsigned long int *hashcodes
;
5198 unsigned long int *hashval
;
5199 unsigned long int *indx
;
5200 unsigned long int *counts
;
5203 long int min_dynindx
;
5204 unsigned long int bucketcount
;
5205 unsigned long int symindx
;
5206 long int local_indx
;
5207 long int shift1
, shift2
;
5208 unsigned long int mask
;
5212 /* This function will be called though elf_link_hash_traverse to store
5213 all hash value of the exported symbols in an array. */
5216 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5218 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5224 /* Ignore indirect symbols. These are added by the versioning code. */
5225 if (h
->dynindx
== -1)
5228 /* Ignore also local symbols and undefined symbols. */
5229 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5232 name
= h
->root
.root
.string
;
5233 p
= strchr (name
, ELF_VER_CHR
);
5236 alc
= (char *) bfd_malloc (p
- name
+ 1);
5242 memcpy (alc
, name
, p
- name
);
5243 alc
[p
- name
] = '\0';
5247 /* Compute the hash value. */
5248 ha
= bfd_elf_gnu_hash (name
);
5250 /* Store the found hash value in the array for compute_bucket_count,
5251 and also for .dynsym reordering purposes. */
5252 s
->hashcodes
[s
->nsyms
] = ha
;
5253 s
->hashval
[h
->dynindx
] = ha
;
5255 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
5256 s
->min_dynindx
= h
->dynindx
;
5264 /* This function will be called though elf_link_hash_traverse to do
5265 final dynaminc symbol renumbering. */
5268 elf_renumber_gnu_hash_syms (struct elf_link_hash_entry
*h
, void *data
)
5270 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5271 unsigned long int bucket
;
5272 unsigned long int val
;
5274 /* Ignore indirect symbols. */
5275 if (h
->dynindx
== -1)
5278 /* Ignore also local symbols and undefined symbols. */
5279 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5281 if (h
->dynindx
>= s
->min_dynindx
)
5282 h
->dynindx
= s
->local_indx
++;
5286 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
5287 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
5288 & ((s
->maskbits
>> s
->shift1
) - 1);
5289 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
5291 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
5292 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
5293 if (s
->counts
[bucket
] == 1)
5294 /* Last element terminates the chain. */
5296 bfd_put_32 (s
->output_bfd
, val
,
5297 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
5298 --s
->counts
[bucket
];
5299 h
->dynindx
= s
->indx
[bucket
]++;
5303 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5306 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
5308 return !(h
->forced_local
5309 || h
->root
.type
== bfd_link_hash_undefined
5310 || h
->root
.type
== bfd_link_hash_undefweak
5311 || ((h
->root
.type
== bfd_link_hash_defined
5312 || h
->root
.type
== bfd_link_hash_defweak
)
5313 && h
->root
.u
.def
.section
->output_section
== NULL
));
5316 /* Array used to determine the number of hash table buckets to use
5317 based on the number of symbols there are. If there are fewer than
5318 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
5319 fewer than 37 we use 17 buckets, and so forth. We never use more
5320 than 32771 buckets. */
5322 static const size_t elf_buckets
[] =
5324 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
5328 /* Compute bucket count for hashing table. We do not use a static set
5329 of possible tables sizes anymore. Instead we determine for all
5330 possible reasonable sizes of the table the outcome (i.e., the
5331 number of collisions etc) and choose the best solution. The
5332 weighting functions are not too simple to allow the table to grow
5333 without bounds. Instead one of the weighting factors is the size.
5334 Therefore the result is always a good payoff between few collisions
5335 (= short chain lengths) and table size. */
5337 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5338 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
5339 unsigned long int nsyms
,
5342 size_t best_size
= 0;
5343 unsigned long int i
;
5345 /* We have a problem here. The following code to optimize the table
5346 size requires an integer type with more the 32 bits. If
5347 BFD_HOST_U_64_BIT is set we know about such a type. */
5348 #ifdef BFD_HOST_U_64_BIT
5353 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
5354 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
5355 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
5356 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
5357 unsigned long int *counts
;
5359 unsigned int no_improvement_count
= 0;
5361 /* Possible optimization parameters: if we have NSYMS symbols we say
5362 that the hashing table must at least have NSYMS/4 and at most
5364 minsize
= nsyms
/ 4;
5367 best_size
= maxsize
= nsyms
* 2;
5372 if ((best_size
& 31) == 0)
5376 /* Create array where we count the collisions in. We must use bfd_malloc
5377 since the size could be large. */
5379 amt
*= sizeof (unsigned long int);
5380 counts
= (unsigned long int *) bfd_malloc (amt
);
5384 /* Compute the "optimal" size for the hash table. The criteria is a
5385 minimal chain length. The minor criteria is (of course) the size
5387 for (i
= minsize
; i
< maxsize
; ++i
)
5389 /* Walk through the array of hashcodes and count the collisions. */
5390 BFD_HOST_U_64_BIT max
;
5391 unsigned long int j
;
5392 unsigned long int fact
;
5394 if (gnu_hash
&& (i
& 31) == 0)
5397 memset (counts
, '\0', i
* sizeof (unsigned long int));
5399 /* Determine how often each hash bucket is used. */
5400 for (j
= 0; j
< nsyms
; ++j
)
5401 ++counts
[hashcodes
[j
] % i
];
5403 /* For the weight function we need some information about the
5404 pagesize on the target. This is information need not be 100%
5405 accurate. Since this information is not available (so far) we
5406 define it here to a reasonable default value. If it is crucial
5407 to have a better value some day simply define this value. */
5408 # ifndef BFD_TARGET_PAGESIZE
5409 # define BFD_TARGET_PAGESIZE (4096)
5412 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
5414 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
5417 /* Variant 1: optimize for short chains. We add the squares
5418 of all the chain lengths (which favors many small chain
5419 over a few long chains). */
5420 for (j
= 0; j
< i
; ++j
)
5421 max
+= counts
[j
] * counts
[j
];
5423 /* This adds penalties for the overall size of the table. */
5424 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5427 /* Variant 2: Optimize a lot more for small table. Here we
5428 also add squares of the size but we also add penalties for
5429 empty slots (the +1 term). */
5430 for (j
= 0; j
< i
; ++j
)
5431 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
5433 /* The overall size of the table is considered, but not as
5434 strong as in variant 1, where it is squared. */
5435 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5439 /* Compare with current best results. */
5440 if (max
< best_chlen
)
5444 no_improvement_count
= 0;
5446 /* PR 11843: Avoid futile long searches for the best bucket size
5447 when there are a large number of symbols. */
5448 else if (++no_improvement_count
== 100)
5455 #endif /* defined (BFD_HOST_U_64_BIT) */
5457 /* This is the fallback solution if no 64bit type is available or if we
5458 are not supposed to spend much time on optimizations. We select the
5459 bucket count using a fixed set of numbers. */
5460 for (i
= 0; elf_buckets
[i
] != 0; i
++)
5462 best_size
= elf_buckets
[i
];
5463 if (nsyms
< elf_buckets
[i
+ 1])
5466 if (gnu_hash
&& best_size
< 2)
5473 /* Size any SHT_GROUP section for ld -r. */
5476 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
5480 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
5481 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
5482 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
5487 /* Set a default stack segment size. The value in INFO wins. If it
5488 is unset, LEGACY_SYMBOL's value is used, and if that symbol is
5489 undefined it is initialized. */
5492 bfd_elf_stack_segment_size (bfd
*output_bfd
,
5493 struct bfd_link_info
*info
,
5494 const char *legacy_symbol
,
5495 bfd_vma default_size
)
5497 struct elf_link_hash_entry
*h
= NULL
;
5499 /* Look for legacy symbol. */
5501 h
= elf_link_hash_lookup (elf_hash_table (info
), legacy_symbol
,
5502 FALSE
, FALSE
, FALSE
);
5503 if (h
&& (h
->root
.type
== bfd_link_hash_defined
5504 || h
->root
.type
== bfd_link_hash_defweak
)
5506 && (h
->type
== STT_NOTYPE
|| h
->type
== STT_OBJECT
))
5508 /* The symbol has no type if specified on the command line. */
5509 h
->type
= STT_OBJECT
;
5510 if (info
->stacksize
)
5511 (*_bfd_error_handler
) (_("%B: stack size specified and %s set"),
5512 output_bfd
, legacy_symbol
);
5513 else if (h
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
5514 (*_bfd_error_handler
) (_("%B: %s not absolute"),
5515 output_bfd
, legacy_symbol
);
5517 info
->stacksize
= h
->root
.u
.def
.value
;
5520 if (!info
->stacksize
)
5521 /* If the user didn't set a size, or explicitly inhibit the
5522 size, set it now. */
5523 info
->stacksize
= default_size
;
5525 /* Provide the legacy symbol, if it is referenced. */
5526 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
5527 || h
->root
.type
== bfd_link_hash_undefweak
))
5529 struct bfd_link_hash_entry
*bh
= NULL
;
5531 if (!(_bfd_generic_link_add_one_symbol
5532 (info
, output_bfd
, legacy_symbol
,
5533 BSF_GLOBAL
, bfd_abs_section_ptr
,
5534 info
->stacksize
>= 0 ? info
->stacksize
: 0,
5535 NULL
, FALSE
, get_elf_backend_data (output_bfd
)->collect
, &bh
)))
5538 h
= (struct elf_link_hash_entry
*) bh
;
5540 h
->type
= STT_OBJECT
;
5546 /* Set up the sizes and contents of the ELF dynamic sections. This is
5547 called by the ELF linker emulation before_allocation routine. We
5548 must set the sizes of the sections before the linker sets the
5549 addresses of the various sections. */
5552 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
5555 const char *filter_shlib
,
5557 const char *depaudit
,
5558 const char * const *auxiliary_filters
,
5559 struct bfd_link_info
*info
,
5560 asection
**sinterpptr
)
5562 bfd_size_type soname_indx
;
5564 const struct elf_backend_data
*bed
;
5565 struct elf_info_failed asvinfo
;
5569 soname_indx
= (bfd_size_type
) -1;
5571 if (!is_elf_hash_table (info
->hash
))
5574 bed
= get_elf_backend_data (output_bfd
);
5576 /* Any syms created from now on start with -1 in
5577 got.refcount/offset and plt.refcount/offset. */
5578 elf_hash_table (info
)->init_got_refcount
5579 = elf_hash_table (info
)->init_got_offset
;
5580 elf_hash_table (info
)->init_plt_refcount
5581 = elf_hash_table (info
)->init_plt_offset
;
5583 if (info
->relocatable
5584 && !_bfd_elf_size_group_sections (info
))
5587 /* The backend may have to create some sections regardless of whether
5588 we're dynamic or not. */
5589 if (bed
->elf_backend_always_size_sections
5590 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
5593 /* Determine any GNU_STACK segment requirements, after the backend
5594 has had a chance to set a default segment size. */
5595 if (info
->execstack
)
5596 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| PF_X
;
5597 else if (info
->noexecstack
)
5598 elf_stack_flags (output_bfd
) = PF_R
| PF_W
;
5602 asection
*notesec
= NULL
;
5605 for (inputobj
= info
->input_bfds
;
5607 inputobj
= inputobj
->link_next
)
5612 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
5614 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
5617 if (s
->flags
& SEC_CODE
)
5621 else if (bed
->default_execstack
)
5624 if (notesec
|| info
->stacksize
> 0)
5625 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| exec
;
5626 if (notesec
&& exec
&& info
->relocatable
5627 && notesec
->output_section
!= bfd_abs_section_ptr
)
5628 notesec
->output_section
->flags
|= SEC_CODE
;
5631 dynobj
= elf_hash_table (info
)->dynobj
;
5633 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5635 struct elf_info_failed eif
;
5636 struct elf_link_hash_entry
*h
;
5638 struct bfd_elf_version_tree
*t
;
5639 struct bfd_elf_version_expr
*d
;
5641 bfd_boolean all_defined
;
5643 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
5644 BFD_ASSERT (*sinterpptr
!= NULL
|| !info
->executable
);
5648 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5650 if (soname_indx
== (bfd_size_type
) -1
5651 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
5657 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
5659 info
->flags
|= DF_SYMBOLIC
;
5667 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
5669 if (indx
== (bfd_size_type
) -1)
5672 tag
= info
->new_dtags
? DT_RUNPATH
: DT_RPATH
;
5673 if (!_bfd_elf_add_dynamic_entry (info
, tag
, indx
))
5677 if (filter_shlib
!= NULL
)
5681 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5682 filter_shlib
, TRUE
);
5683 if (indx
== (bfd_size_type
) -1
5684 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
5688 if (auxiliary_filters
!= NULL
)
5690 const char * const *p
;
5692 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
5696 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5698 if (indx
== (bfd_size_type
) -1
5699 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
5708 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
5710 if (indx
== (bfd_size_type
) -1
5711 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
5715 if (depaudit
!= NULL
)
5719 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
5721 if (indx
== (bfd_size_type
) -1
5722 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
5729 /* If we are supposed to export all symbols into the dynamic symbol
5730 table (this is not the normal case), then do so. */
5731 if (info
->export_dynamic
5732 || (info
->executable
&& info
->dynamic
))
5734 elf_link_hash_traverse (elf_hash_table (info
),
5735 _bfd_elf_export_symbol
,
5741 /* Make all global versions with definition. */
5742 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5743 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5744 if (!d
->symver
&& d
->literal
)
5746 const char *verstr
, *name
;
5747 size_t namelen
, verlen
, newlen
;
5748 char *newname
, *p
, leading_char
;
5749 struct elf_link_hash_entry
*newh
;
5751 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
5753 namelen
= strlen (name
) + (leading_char
!= '\0');
5755 verlen
= strlen (verstr
);
5756 newlen
= namelen
+ verlen
+ 3;
5758 newname
= (char *) bfd_malloc (newlen
);
5759 if (newname
== NULL
)
5761 newname
[0] = leading_char
;
5762 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
5764 /* Check the hidden versioned definition. */
5765 p
= newname
+ namelen
;
5767 memcpy (p
, verstr
, verlen
+ 1);
5768 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5769 newname
, FALSE
, FALSE
,
5772 || (newh
->root
.type
!= bfd_link_hash_defined
5773 && newh
->root
.type
!= bfd_link_hash_defweak
))
5775 /* Check the default versioned definition. */
5777 memcpy (p
, verstr
, verlen
+ 1);
5778 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5779 newname
, FALSE
, FALSE
,
5784 /* Mark this version if there is a definition and it is
5785 not defined in a shared object. */
5787 && !newh
->def_dynamic
5788 && (newh
->root
.type
== bfd_link_hash_defined
5789 || newh
->root
.type
== bfd_link_hash_defweak
))
5793 /* Attach all the symbols to their version information. */
5794 asvinfo
.info
= info
;
5795 asvinfo
.failed
= FALSE
;
5797 elf_link_hash_traverse (elf_hash_table (info
),
5798 _bfd_elf_link_assign_sym_version
,
5803 if (!info
->allow_undefined_version
)
5805 /* Check if all global versions have a definition. */
5807 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5808 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5809 if (d
->literal
&& !d
->symver
&& !d
->script
)
5811 (*_bfd_error_handler
)
5812 (_("%s: undefined version: %s"),
5813 d
->pattern
, t
->name
);
5814 all_defined
= FALSE
;
5819 bfd_set_error (bfd_error_bad_value
);
5824 /* Find all symbols which were defined in a dynamic object and make
5825 the backend pick a reasonable value for them. */
5826 elf_link_hash_traverse (elf_hash_table (info
),
5827 _bfd_elf_adjust_dynamic_symbol
,
5832 /* Add some entries to the .dynamic section. We fill in some of the
5833 values later, in bfd_elf_final_link, but we must add the entries
5834 now so that we know the final size of the .dynamic section. */
5836 /* If there are initialization and/or finalization functions to
5837 call then add the corresponding DT_INIT/DT_FINI entries. */
5838 h
= (info
->init_function
5839 ? elf_link_hash_lookup (elf_hash_table (info
),
5840 info
->init_function
, FALSE
,
5847 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
5850 h
= (info
->fini_function
5851 ? elf_link_hash_lookup (elf_hash_table (info
),
5852 info
->fini_function
, FALSE
,
5859 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
5863 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
5864 if (s
!= NULL
&& s
->linker_has_input
)
5866 /* DT_PREINIT_ARRAY is not allowed in shared library. */
5867 if (! info
->executable
)
5872 for (sub
= info
->input_bfds
; sub
!= NULL
;
5873 sub
= sub
->link_next
)
5874 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
)
5875 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5876 if (elf_section_data (o
)->this_hdr
.sh_type
5877 == SHT_PREINIT_ARRAY
)
5879 (*_bfd_error_handler
)
5880 (_("%B: .preinit_array section is not allowed in DSO"),
5885 bfd_set_error (bfd_error_nonrepresentable_section
);
5889 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
5890 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
5893 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
5894 if (s
!= NULL
&& s
->linker_has_input
)
5896 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
5897 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
5900 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
5901 if (s
!= NULL
&& s
->linker_has_input
)
5903 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
5904 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
5908 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
5909 /* If .dynstr is excluded from the link, we don't want any of
5910 these tags. Strictly, we should be checking each section
5911 individually; This quick check covers for the case where
5912 someone does a /DISCARD/ : { *(*) }. */
5913 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
5915 bfd_size_type strsize
;
5917 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
5918 if ((info
->emit_hash
5919 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
5920 || (info
->emit_gnu_hash
5921 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0))
5922 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
5923 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
5924 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
5925 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
5926 bed
->s
->sizeof_sym
))
5931 /* The backend must work out the sizes of all the other dynamic
5934 && bed
->elf_backend_size_dynamic_sections
!= NULL
5935 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
5938 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
5941 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5943 unsigned long section_sym_count
;
5944 struct bfd_elf_version_tree
*verdefs
;
5947 /* Set up the version definition section. */
5948 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
5949 BFD_ASSERT (s
!= NULL
);
5951 /* We may have created additional version definitions if we are
5952 just linking a regular application. */
5953 verdefs
= info
->version_info
;
5955 /* Skip anonymous version tag. */
5956 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
5957 verdefs
= verdefs
->next
;
5959 if (verdefs
== NULL
&& !info
->create_default_symver
)
5960 s
->flags
|= SEC_EXCLUDE
;
5965 struct bfd_elf_version_tree
*t
;
5967 Elf_Internal_Verdef def
;
5968 Elf_Internal_Verdaux defaux
;
5969 struct bfd_link_hash_entry
*bh
;
5970 struct elf_link_hash_entry
*h
;
5976 /* Make space for the base version. */
5977 size
+= sizeof (Elf_External_Verdef
);
5978 size
+= sizeof (Elf_External_Verdaux
);
5981 /* Make space for the default version. */
5982 if (info
->create_default_symver
)
5984 size
+= sizeof (Elf_External_Verdef
);
5988 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
5990 struct bfd_elf_version_deps
*n
;
5992 /* Don't emit base version twice. */
5996 size
+= sizeof (Elf_External_Verdef
);
5997 size
+= sizeof (Elf_External_Verdaux
);
6000 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6001 size
+= sizeof (Elf_External_Verdaux
);
6005 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6006 if (s
->contents
== NULL
&& s
->size
!= 0)
6009 /* Fill in the version definition section. */
6013 def
.vd_version
= VER_DEF_CURRENT
;
6014 def
.vd_flags
= VER_FLG_BASE
;
6017 if (info
->create_default_symver
)
6019 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6020 def
.vd_next
= sizeof (Elf_External_Verdef
);
6024 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6025 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6026 + sizeof (Elf_External_Verdaux
));
6029 if (soname_indx
!= (bfd_size_type
) -1)
6031 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6033 def
.vd_hash
= bfd_elf_hash (soname
);
6034 defaux
.vda_name
= soname_indx
;
6041 name
= lbasename (output_bfd
->filename
);
6042 def
.vd_hash
= bfd_elf_hash (name
);
6043 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6045 if (indx
== (bfd_size_type
) -1)
6047 defaux
.vda_name
= indx
;
6049 defaux
.vda_next
= 0;
6051 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6052 (Elf_External_Verdef
*) p
);
6053 p
+= sizeof (Elf_External_Verdef
);
6054 if (info
->create_default_symver
)
6056 /* Add a symbol representing this version. */
6058 if (! (_bfd_generic_link_add_one_symbol
6059 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6061 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6063 h
= (struct elf_link_hash_entry
*) bh
;
6066 h
->type
= STT_OBJECT
;
6067 h
->verinfo
.vertree
= NULL
;
6069 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6072 /* Create a duplicate of the base version with the same
6073 aux block, but different flags. */
6076 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6078 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6079 + sizeof (Elf_External_Verdaux
));
6082 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6083 (Elf_External_Verdef
*) p
);
6084 p
+= sizeof (Elf_External_Verdef
);
6086 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6087 (Elf_External_Verdaux
*) p
);
6088 p
+= sizeof (Elf_External_Verdaux
);
6090 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6093 struct bfd_elf_version_deps
*n
;
6095 /* Don't emit the base version twice. */
6100 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6103 /* Add a symbol representing this version. */
6105 if (! (_bfd_generic_link_add_one_symbol
6106 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6108 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6110 h
= (struct elf_link_hash_entry
*) bh
;
6113 h
->type
= STT_OBJECT
;
6114 h
->verinfo
.vertree
= t
;
6116 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6119 def
.vd_version
= VER_DEF_CURRENT
;
6121 if (t
->globals
.list
== NULL
6122 && t
->locals
.list
== NULL
6124 def
.vd_flags
|= VER_FLG_WEAK
;
6125 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6126 def
.vd_cnt
= cdeps
+ 1;
6127 def
.vd_hash
= bfd_elf_hash (t
->name
);
6128 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6131 /* If a basever node is next, it *must* be the last node in
6132 the chain, otherwise Verdef construction breaks. */
6133 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6134 BFD_ASSERT (t
->next
->next
== NULL
);
6136 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6137 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6138 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6140 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6141 (Elf_External_Verdef
*) p
);
6142 p
+= sizeof (Elf_External_Verdef
);
6144 defaux
.vda_name
= h
->dynstr_index
;
6145 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6147 defaux
.vda_next
= 0;
6148 if (t
->deps
!= NULL
)
6149 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6150 t
->name_indx
= defaux
.vda_name
;
6152 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6153 (Elf_External_Verdaux
*) p
);
6154 p
+= sizeof (Elf_External_Verdaux
);
6156 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6158 if (n
->version_needed
== NULL
)
6160 /* This can happen if there was an error in the
6162 defaux
.vda_name
= 0;
6166 defaux
.vda_name
= n
->version_needed
->name_indx
;
6167 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6170 if (n
->next
== NULL
)
6171 defaux
.vda_next
= 0;
6173 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6175 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6176 (Elf_External_Verdaux
*) p
);
6177 p
+= sizeof (Elf_External_Verdaux
);
6181 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
6182 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
6185 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6188 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
6190 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
6193 else if (info
->flags
& DF_BIND_NOW
)
6195 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
6201 if (info
->executable
)
6202 info
->flags_1
&= ~ (DF_1_INITFIRST
6205 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
6209 /* Work out the size of the version reference section. */
6211 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6212 BFD_ASSERT (s
!= NULL
);
6214 struct elf_find_verdep_info sinfo
;
6217 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6218 if (sinfo
.vers
== 0)
6220 sinfo
.failed
= FALSE
;
6222 elf_link_hash_traverse (elf_hash_table (info
),
6223 _bfd_elf_link_find_version_dependencies
,
6228 if (elf_tdata (output_bfd
)->verref
== NULL
)
6229 s
->flags
|= SEC_EXCLUDE
;
6232 Elf_Internal_Verneed
*t
;
6237 /* Build the version dependency section. */
6240 for (t
= elf_tdata (output_bfd
)->verref
;
6244 Elf_Internal_Vernaux
*a
;
6246 size
+= sizeof (Elf_External_Verneed
);
6248 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6249 size
+= sizeof (Elf_External_Vernaux
);
6253 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6254 if (s
->contents
== NULL
)
6258 for (t
= elf_tdata (output_bfd
)->verref
;
6263 Elf_Internal_Vernaux
*a
;
6267 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6270 t
->vn_version
= VER_NEED_CURRENT
;
6272 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6273 elf_dt_name (t
->vn_bfd
) != NULL
6274 ? elf_dt_name (t
->vn_bfd
)
6275 : lbasename (t
->vn_bfd
->filename
),
6277 if (indx
== (bfd_size_type
) -1)
6280 t
->vn_aux
= sizeof (Elf_External_Verneed
);
6281 if (t
->vn_nextref
== NULL
)
6284 t
->vn_next
= (sizeof (Elf_External_Verneed
)
6285 + caux
* sizeof (Elf_External_Vernaux
));
6287 _bfd_elf_swap_verneed_out (output_bfd
, t
,
6288 (Elf_External_Verneed
*) p
);
6289 p
+= sizeof (Elf_External_Verneed
);
6291 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6293 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6294 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6295 a
->vna_nodename
, FALSE
);
6296 if (indx
== (bfd_size_type
) -1)
6299 if (a
->vna_nextptr
== NULL
)
6302 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6304 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6305 (Elf_External_Vernaux
*) p
);
6306 p
+= sizeof (Elf_External_Vernaux
);
6310 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
6311 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
6314 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6318 if ((elf_tdata (output_bfd
)->cverrefs
== 0
6319 && elf_tdata (output_bfd
)->cverdefs
== 0)
6320 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6321 §ion_sym_count
) == 0)
6323 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6324 s
->flags
|= SEC_EXCLUDE
;
6330 /* Find the first non-excluded output section. We'll use its
6331 section symbol for some emitted relocs. */
6333 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
6337 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6338 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
6339 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6341 elf_hash_table (info
)->text_index_section
= s
;
6346 /* Find two non-excluded output sections, one for code, one for data.
6347 We'll use their section symbols for some emitted relocs. */
6349 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
6353 /* Data first, since setting text_index_section changes
6354 _bfd_elf_link_omit_section_dynsym. */
6355 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6356 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
)) == SEC_ALLOC
)
6357 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6359 elf_hash_table (info
)->data_index_section
= s
;
6363 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6364 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
))
6365 == (SEC_ALLOC
| SEC_READONLY
))
6366 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6368 elf_hash_table (info
)->text_index_section
= s
;
6372 if (elf_hash_table (info
)->text_index_section
== NULL
)
6373 elf_hash_table (info
)->text_index_section
6374 = elf_hash_table (info
)->data_index_section
;
6378 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
6380 const struct elf_backend_data
*bed
;
6382 if (!is_elf_hash_table (info
->hash
))
6385 bed
= get_elf_backend_data (output_bfd
);
6386 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
6388 if (elf_hash_table (info
)->dynamic_sections_created
)
6392 bfd_size_type dynsymcount
;
6393 unsigned long section_sym_count
;
6394 unsigned int dtagcount
;
6396 dynobj
= elf_hash_table (info
)->dynobj
;
6398 /* Assign dynsym indicies. In a shared library we generate a
6399 section symbol for each output section, which come first.
6400 Next come all of the back-end allocated local dynamic syms,
6401 followed by the rest of the global symbols. */
6403 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6404 §ion_sym_count
);
6406 /* Work out the size of the symbol version section. */
6407 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6408 BFD_ASSERT (s
!= NULL
);
6409 if (dynsymcount
!= 0
6410 && (s
->flags
& SEC_EXCLUDE
) == 0)
6412 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
6413 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6414 if (s
->contents
== NULL
)
6417 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
6421 /* Set the size of the .dynsym and .hash sections. We counted
6422 the number of dynamic symbols in elf_link_add_object_symbols.
6423 We will build the contents of .dynsym and .hash when we build
6424 the final symbol table, because until then we do not know the
6425 correct value to give the symbols. We built the .dynstr
6426 section as we went along in elf_link_add_object_symbols. */
6427 s
= bfd_get_linker_section (dynobj
, ".dynsym");
6428 BFD_ASSERT (s
!= NULL
);
6429 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
6431 if (dynsymcount
!= 0)
6433 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6434 if (s
->contents
== NULL
)
6437 /* The first entry in .dynsym is a dummy symbol.
6438 Clear all the section syms, in case we don't output them all. */
6439 ++section_sym_count
;
6440 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
6443 elf_hash_table (info
)->bucketcount
= 0;
6445 /* Compute the size of the hashing table. As a side effect this
6446 computes the hash values for all the names we export. */
6447 if (info
->emit_hash
)
6449 unsigned long int *hashcodes
;
6450 struct hash_codes_info hashinf
;
6452 unsigned long int nsyms
;
6454 size_t hash_entry_size
;
6456 /* Compute the hash values for all exported symbols. At the same
6457 time store the values in an array so that we could use them for
6459 amt
= dynsymcount
* sizeof (unsigned long int);
6460 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
6461 if (hashcodes
== NULL
)
6463 hashinf
.hashcodes
= hashcodes
;
6464 hashinf
.error
= FALSE
;
6466 /* Put all hash values in HASHCODES. */
6467 elf_link_hash_traverse (elf_hash_table (info
),
6468 elf_collect_hash_codes
, &hashinf
);
6475 nsyms
= hashinf
.hashcodes
- hashcodes
;
6477 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
6480 if (bucketcount
== 0)
6483 elf_hash_table (info
)->bucketcount
= bucketcount
;
6485 s
= bfd_get_linker_section (dynobj
, ".hash");
6486 BFD_ASSERT (s
!= NULL
);
6487 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
6488 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
6489 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6490 if (s
->contents
== NULL
)
6493 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
6494 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
6495 s
->contents
+ hash_entry_size
);
6498 if (info
->emit_gnu_hash
)
6501 unsigned char *contents
;
6502 struct collect_gnu_hash_codes cinfo
;
6506 memset (&cinfo
, 0, sizeof (cinfo
));
6508 /* Compute the hash values for all exported symbols. At the same
6509 time store the values in an array so that we could use them for
6511 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
6512 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
6513 if (cinfo
.hashcodes
== NULL
)
6516 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
6517 cinfo
.min_dynindx
= -1;
6518 cinfo
.output_bfd
= output_bfd
;
6521 /* Put all hash values in HASHCODES. */
6522 elf_link_hash_traverse (elf_hash_table (info
),
6523 elf_collect_gnu_hash_codes
, &cinfo
);
6526 free (cinfo
.hashcodes
);
6531 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
6533 if (bucketcount
== 0)
6535 free (cinfo
.hashcodes
);
6539 s
= bfd_get_linker_section (dynobj
, ".gnu.hash");
6540 BFD_ASSERT (s
!= NULL
);
6542 if (cinfo
.nsyms
== 0)
6544 /* Empty .gnu.hash section is special. */
6545 BFD_ASSERT (cinfo
.min_dynindx
== -1);
6546 free (cinfo
.hashcodes
);
6547 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
6548 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6549 if (contents
== NULL
)
6551 s
->contents
= contents
;
6552 /* 1 empty bucket. */
6553 bfd_put_32 (output_bfd
, 1, contents
);
6554 /* SYMIDX above the special symbol 0. */
6555 bfd_put_32 (output_bfd
, 1, contents
+ 4);
6556 /* Just one word for bitmask. */
6557 bfd_put_32 (output_bfd
, 1, contents
+ 8);
6558 /* Only hash fn bloom filter. */
6559 bfd_put_32 (output_bfd
, 0, contents
+ 12);
6560 /* No hashes are valid - empty bitmask. */
6561 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
6562 /* No hashes in the only bucket. */
6563 bfd_put_32 (output_bfd
, 0,
6564 contents
+ 16 + bed
->s
->arch_size
/ 8);
6568 unsigned long int maskwords
, maskbitslog2
, x
;
6569 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
6573 while ((x
>>= 1) != 0)
6575 if (maskbitslog2
< 3)
6577 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
6578 maskbitslog2
= maskbitslog2
+ 3;
6580 maskbitslog2
= maskbitslog2
+ 2;
6581 if (bed
->s
->arch_size
== 64)
6583 if (maskbitslog2
== 5)
6589 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
6590 cinfo
.shift2
= maskbitslog2
;
6591 cinfo
.maskbits
= 1 << maskbitslog2
;
6592 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
6593 amt
= bucketcount
* sizeof (unsigned long int) * 2;
6594 amt
+= maskwords
* sizeof (bfd_vma
);
6595 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
6596 if (cinfo
.bitmask
== NULL
)
6598 free (cinfo
.hashcodes
);
6602 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
6603 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
6604 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
6605 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
6607 /* Determine how often each hash bucket is used. */
6608 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
6609 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
6610 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
6612 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
6613 if (cinfo
.counts
[i
] != 0)
6615 cinfo
.indx
[i
] = cnt
;
6616 cnt
+= cinfo
.counts
[i
];
6618 BFD_ASSERT (cnt
== dynsymcount
);
6619 cinfo
.bucketcount
= bucketcount
;
6620 cinfo
.local_indx
= cinfo
.min_dynindx
;
6622 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
6623 s
->size
+= cinfo
.maskbits
/ 8;
6624 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6625 if (contents
== NULL
)
6627 free (cinfo
.bitmask
);
6628 free (cinfo
.hashcodes
);
6632 s
->contents
= contents
;
6633 bfd_put_32 (output_bfd
, bucketcount
, contents
);
6634 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
6635 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
6636 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
6637 contents
+= 16 + cinfo
.maskbits
/ 8;
6639 for (i
= 0; i
< bucketcount
; ++i
)
6641 if (cinfo
.counts
[i
] == 0)
6642 bfd_put_32 (output_bfd
, 0, contents
);
6644 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
6648 cinfo
.contents
= contents
;
6650 /* Renumber dynamic symbols, populate .gnu.hash section. */
6651 elf_link_hash_traverse (elf_hash_table (info
),
6652 elf_renumber_gnu_hash_syms
, &cinfo
);
6654 contents
= s
->contents
+ 16;
6655 for (i
= 0; i
< maskwords
; ++i
)
6657 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
6659 contents
+= bed
->s
->arch_size
/ 8;
6662 free (cinfo
.bitmask
);
6663 free (cinfo
.hashcodes
);
6667 s
= bfd_get_linker_section (dynobj
, ".dynstr");
6668 BFD_ASSERT (s
!= NULL
);
6670 elf_finalize_dynstr (output_bfd
, info
);
6672 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6674 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
6675 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
6682 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
6685 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
6688 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
6689 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
6692 /* Finish SHF_MERGE section merging. */
6695 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
6700 if (!is_elf_hash_table (info
->hash
))
6703 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
6704 if ((ibfd
->flags
& DYNAMIC
) == 0)
6705 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6706 if ((sec
->flags
& SEC_MERGE
) != 0
6707 && !bfd_is_abs_section (sec
->output_section
))
6709 struct bfd_elf_section_data
*secdata
;
6711 secdata
= elf_section_data (sec
);
6712 if (! _bfd_add_merge_section (abfd
,
6713 &elf_hash_table (info
)->merge_info
,
6714 sec
, &secdata
->sec_info
))
6716 else if (secdata
->sec_info
)
6717 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
6720 if (elf_hash_table (info
)->merge_info
!= NULL
)
6721 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
6722 merge_sections_remove_hook
);
6726 /* Create an entry in an ELF linker hash table. */
6728 struct bfd_hash_entry
*
6729 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
6730 struct bfd_hash_table
*table
,
6733 /* Allocate the structure if it has not already been allocated by a
6737 entry
= (struct bfd_hash_entry
*)
6738 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
6743 /* Call the allocation method of the superclass. */
6744 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
6747 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
6748 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
6750 /* Set local fields. */
6753 ret
->got
= htab
->init_got_refcount
;
6754 ret
->plt
= htab
->init_plt_refcount
;
6755 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
6756 - offsetof (struct elf_link_hash_entry
, size
)));
6757 /* Assume that we have been called by a non-ELF symbol reader.
6758 This flag is then reset by the code which reads an ELF input
6759 file. This ensures that a symbol created by a non-ELF symbol
6760 reader will have the flag set correctly. */
6767 /* Copy data from an indirect symbol to its direct symbol, hiding the
6768 old indirect symbol. Also used for copying flags to a weakdef. */
6771 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
6772 struct elf_link_hash_entry
*dir
,
6773 struct elf_link_hash_entry
*ind
)
6775 struct elf_link_hash_table
*htab
;
6777 /* Copy down any references that we may have already seen to the
6778 symbol which just became indirect. */
6780 dir
->ref_dynamic
|= ind
->ref_dynamic
;
6781 dir
->ref_regular
|= ind
->ref_regular
;
6782 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
6783 dir
->non_got_ref
|= ind
->non_got_ref
;
6784 dir
->needs_plt
|= ind
->needs_plt
;
6785 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
6787 if (ind
->root
.type
!= bfd_link_hash_indirect
)
6790 /* Copy over the global and procedure linkage table refcount entries.
6791 These may have been already set up by a check_relocs routine. */
6792 htab
= elf_hash_table (info
);
6793 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
6795 if (dir
->got
.refcount
< 0)
6796 dir
->got
.refcount
= 0;
6797 dir
->got
.refcount
+= ind
->got
.refcount
;
6798 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
6801 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
6803 if (dir
->plt
.refcount
< 0)
6804 dir
->plt
.refcount
= 0;
6805 dir
->plt
.refcount
+= ind
->plt
.refcount
;
6806 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
6809 if (ind
->dynindx
!= -1)
6811 if (dir
->dynindx
!= -1)
6812 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
6813 dir
->dynindx
= ind
->dynindx
;
6814 dir
->dynstr_index
= ind
->dynstr_index
;
6816 ind
->dynstr_index
= 0;
6821 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
6822 struct elf_link_hash_entry
*h
,
6823 bfd_boolean force_local
)
6825 /* STT_GNU_IFUNC symbol must go through PLT. */
6826 if (h
->type
!= STT_GNU_IFUNC
)
6828 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
6833 h
->forced_local
= 1;
6834 if (h
->dynindx
!= -1)
6837 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
6843 /* Initialize an ELF linker hash table. *TABLE has been zeroed by our
6847 _bfd_elf_link_hash_table_init
6848 (struct elf_link_hash_table
*table
,
6850 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
6851 struct bfd_hash_table
*,
6853 unsigned int entsize
,
6854 enum elf_target_id target_id
)
6857 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
6859 table
->init_got_refcount
.refcount
= can_refcount
- 1;
6860 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
6861 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
6862 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
6863 /* The first dynamic symbol is a dummy. */
6864 table
->dynsymcount
= 1;
6866 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
6868 table
->root
.type
= bfd_link_elf_hash_table
;
6869 table
->hash_table_id
= target_id
;
6874 /* Create an ELF linker hash table. */
6876 struct bfd_link_hash_table
*
6877 _bfd_elf_link_hash_table_create (bfd
*abfd
)
6879 struct elf_link_hash_table
*ret
;
6880 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
6882 ret
= (struct elf_link_hash_table
*) bfd_zmalloc (amt
);
6886 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
6887 sizeof (struct elf_link_hash_entry
),
6897 /* Destroy an ELF linker hash table. */
6900 _bfd_elf_link_hash_table_free (struct bfd_link_hash_table
*hash
)
6902 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) hash
;
6903 if (htab
->dynstr
!= NULL
)
6904 _bfd_elf_strtab_free (htab
->dynstr
);
6905 _bfd_merge_sections_free (htab
->merge_info
);
6906 _bfd_generic_link_hash_table_free (hash
);
6909 /* This is a hook for the ELF emulation code in the generic linker to
6910 tell the backend linker what file name to use for the DT_NEEDED
6911 entry for a dynamic object. */
6914 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
6916 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6917 && bfd_get_format (abfd
) == bfd_object
)
6918 elf_dt_name (abfd
) = name
;
6922 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
6925 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6926 && bfd_get_format (abfd
) == bfd_object
)
6927 lib_class
= elf_dyn_lib_class (abfd
);
6934 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
6936 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6937 && bfd_get_format (abfd
) == bfd_object
)
6938 elf_dyn_lib_class (abfd
) = lib_class
;
6941 /* Get the list of DT_NEEDED entries for a link. This is a hook for
6942 the linker ELF emulation code. */
6944 struct bfd_link_needed_list
*
6945 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6946 struct bfd_link_info
*info
)
6948 if (! is_elf_hash_table (info
->hash
))
6950 return elf_hash_table (info
)->needed
;
6953 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
6954 hook for the linker ELF emulation code. */
6956 struct bfd_link_needed_list
*
6957 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6958 struct bfd_link_info
*info
)
6960 if (! is_elf_hash_table (info
->hash
))
6962 return elf_hash_table (info
)->runpath
;
6965 /* Get the name actually used for a dynamic object for a link. This
6966 is the SONAME entry if there is one. Otherwise, it is the string
6967 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
6970 bfd_elf_get_dt_soname (bfd
*abfd
)
6972 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6973 && bfd_get_format (abfd
) == bfd_object
)
6974 return elf_dt_name (abfd
);
6978 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
6979 the ELF linker emulation code. */
6982 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
6983 struct bfd_link_needed_list
**pneeded
)
6986 bfd_byte
*dynbuf
= NULL
;
6987 unsigned int elfsec
;
6988 unsigned long shlink
;
6989 bfd_byte
*extdyn
, *extdynend
;
6991 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
6995 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
6996 || bfd_get_format (abfd
) != bfd_object
)
6999 s
= bfd_get_section_by_name (abfd
, ".dynamic");
7000 if (s
== NULL
|| s
->size
== 0)
7003 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
7006 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
7007 if (elfsec
== SHN_BAD
)
7010 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
7012 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
7013 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
7016 extdynend
= extdyn
+ s
->size
;
7017 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
7019 Elf_Internal_Dyn dyn
;
7021 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
7023 if (dyn
.d_tag
== DT_NULL
)
7026 if (dyn
.d_tag
== DT_NEEDED
)
7029 struct bfd_link_needed_list
*l
;
7030 unsigned int tagv
= dyn
.d_un
.d_val
;
7033 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
7038 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
7059 struct elf_symbuf_symbol
7061 unsigned long st_name
; /* Symbol name, index in string tbl */
7062 unsigned char st_info
; /* Type and binding attributes */
7063 unsigned char st_other
; /* Visibilty, and target specific */
7066 struct elf_symbuf_head
7068 struct elf_symbuf_symbol
*ssym
;
7069 bfd_size_type count
;
7070 unsigned int st_shndx
;
7077 Elf_Internal_Sym
*isym
;
7078 struct elf_symbuf_symbol
*ssym
;
7083 /* Sort references to symbols by ascending section number. */
7086 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7088 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
7089 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
7091 return s1
->st_shndx
- s2
->st_shndx
;
7095 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7097 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7098 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7099 return strcmp (s1
->name
, s2
->name
);
7102 static struct elf_symbuf_head
*
7103 elf_create_symbuf (bfd_size_type symcount
, Elf_Internal_Sym
*isymbuf
)
7105 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
7106 struct elf_symbuf_symbol
*ssym
;
7107 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
7108 bfd_size_type i
, shndx_count
, total_size
;
7110 indbuf
= (Elf_Internal_Sym
**) bfd_malloc2 (symcount
, sizeof (*indbuf
));
7114 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
7115 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
)
7116 *ind
++ = &isymbuf
[i
];
7119 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
7120 elf_sort_elf_symbol
);
7123 if (indbufend
> indbuf
)
7124 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
7125 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
7128 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
7129 + (indbufend
- indbuf
) * sizeof (*ssym
));
7130 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
7131 if (ssymbuf
== NULL
)
7137 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
7138 ssymbuf
->ssym
= NULL
;
7139 ssymbuf
->count
= shndx_count
;
7140 ssymbuf
->st_shndx
= 0;
7141 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
7143 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
7146 ssymhead
->ssym
= ssym
;
7147 ssymhead
->count
= 0;
7148 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
7150 ssym
->st_name
= (*ind
)->st_name
;
7151 ssym
->st_info
= (*ind
)->st_info
;
7152 ssym
->st_other
= (*ind
)->st_other
;
7155 BFD_ASSERT ((bfd_size_type
) (ssymhead
- ssymbuf
) == shndx_count
7156 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
7163 /* Check if 2 sections define the same set of local and global
7167 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
7168 struct bfd_link_info
*info
)
7171 const struct elf_backend_data
*bed1
, *bed2
;
7172 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7173 bfd_size_type symcount1
, symcount2
;
7174 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7175 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
7176 Elf_Internal_Sym
*isym
, *isymend
;
7177 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
7178 bfd_size_type count1
, count2
, i
;
7179 unsigned int shndx1
, shndx2
;
7185 /* Both sections have to be in ELF. */
7186 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7187 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7190 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7193 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7194 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7195 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
7198 bed1
= get_elf_backend_data (bfd1
);
7199 bed2
= get_elf_backend_data (bfd2
);
7200 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7201 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7202 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7203 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7205 if (symcount1
== 0 || symcount2
== 0)
7211 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
7212 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
7214 if (ssymbuf1
== NULL
)
7216 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7218 if (isymbuf1
== NULL
)
7221 if (!info
->reduce_memory_overheads
)
7222 elf_tdata (bfd1
)->symbuf
= ssymbuf1
7223 = elf_create_symbuf (symcount1
, isymbuf1
);
7226 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
7228 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7230 if (isymbuf2
== NULL
)
7233 if (ssymbuf1
!= NULL
&& !info
->reduce_memory_overheads
)
7234 elf_tdata (bfd2
)->symbuf
= ssymbuf2
7235 = elf_create_symbuf (symcount2
, isymbuf2
);
7238 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
7240 /* Optimized faster version. */
7241 bfd_size_type lo
, hi
, mid
;
7242 struct elf_symbol
*symp
;
7243 struct elf_symbuf_symbol
*ssym
, *ssymend
;
7246 hi
= ssymbuf1
->count
;
7251 mid
= (lo
+ hi
) / 2;
7252 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
7254 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
7258 count1
= ssymbuf1
[mid
].count
;
7265 hi
= ssymbuf2
->count
;
7270 mid
= (lo
+ hi
) / 2;
7271 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
7273 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
7277 count2
= ssymbuf2
[mid
].count
;
7283 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7286 symtable1
= (struct elf_symbol
*)
7287 bfd_malloc (count1
* sizeof (struct elf_symbol
));
7288 symtable2
= (struct elf_symbol
*)
7289 bfd_malloc (count2
* sizeof (struct elf_symbol
));
7290 if (symtable1
== NULL
|| symtable2
== NULL
)
7294 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
7295 ssym
< ssymend
; ssym
++, symp
++)
7297 symp
->u
.ssym
= ssym
;
7298 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
7304 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
7305 ssym
< ssymend
; ssym
++, symp
++)
7307 symp
->u
.ssym
= ssym
;
7308 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
7313 /* Sort symbol by name. */
7314 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7315 elf_sym_name_compare
);
7316 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7317 elf_sym_name_compare
);
7319 for (i
= 0; i
< count1
; i
++)
7320 /* Two symbols must have the same binding, type and name. */
7321 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
7322 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
7323 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7330 symtable1
= (struct elf_symbol
*)
7331 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
7332 symtable2
= (struct elf_symbol
*)
7333 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
7334 if (symtable1
== NULL
|| symtable2
== NULL
)
7337 /* Count definitions in the section. */
7339 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
7340 if (isym
->st_shndx
== shndx1
)
7341 symtable1
[count1
++].u
.isym
= isym
;
7344 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
7345 if (isym
->st_shndx
== shndx2
)
7346 symtable2
[count2
++].u
.isym
= isym
;
7348 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7351 for (i
= 0; i
< count1
; i
++)
7353 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
7354 symtable1
[i
].u
.isym
->st_name
);
7356 for (i
= 0; i
< count2
; i
++)
7358 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
7359 symtable2
[i
].u
.isym
->st_name
);
7361 /* Sort symbol by name. */
7362 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7363 elf_sym_name_compare
);
7364 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7365 elf_sym_name_compare
);
7367 for (i
= 0; i
< count1
; i
++)
7368 /* Two symbols must have the same binding, type and name. */
7369 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
7370 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
7371 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7389 /* Return TRUE if 2 section types are compatible. */
7392 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
7393 bfd
*bbfd
, const asection
*bsec
)
7397 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
7398 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7401 return elf_section_type (asec
) == elf_section_type (bsec
);
7404 /* Final phase of ELF linker. */
7406 /* A structure we use to avoid passing large numbers of arguments. */
7408 struct elf_final_link_info
7410 /* General link information. */
7411 struct bfd_link_info
*info
;
7414 /* Symbol string table. */
7415 struct bfd_strtab_hash
*symstrtab
;
7416 /* .dynsym section. */
7417 asection
*dynsym_sec
;
7418 /* .hash section. */
7420 /* symbol version section (.gnu.version). */
7421 asection
*symver_sec
;
7422 /* Buffer large enough to hold contents of any section. */
7424 /* Buffer large enough to hold external relocs of any section. */
7425 void *external_relocs
;
7426 /* Buffer large enough to hold internal relocs of any section. */
7427 Elf_Internal_Rela
*internal_relocs
;
7428 /* Buffer large enough to hold external local symbols of any input
7430 bfd_byte
*external_syms
;
7431 /* And a buffer for symbol section indices. */
7432 Elf_External_Sym_Shndx
*locsym_shndx
;
7433 /* Buffer large enough to hold internal local symbols of any input
7435 Elf_Internal_Sym
*internal_syms
;
7436 /* Array large enough to hold a symbol index for each local symbol
7437 of any input BFD. */
7439 /* Array large enough to hold a section pointer for each local
7440 symbol of any input BFD. */
7441 asection
**sections
;
7442 /* Buffer to hold swapped out symbols. */
7444 /* And one for symbol section indices. */
7445 Elf_External_Sym_Shndx
*symshndxbuf
;
7446 /* Number of swapped out symbols in buffer. */
7447 size_t symbuf_count
;
7448 /* Number of symbols which fit in symbuf. */
7450 /* And same for symshndxbuf. */
7451 size_t shndxbuf_size
;
7452 /* Number of STT_FILE syms seen. */
7453 size_t filesym_count
;
7456 /* This struct is used to pass information to elf_link_output_extsym. */
7458 struct elf_outext_info
7461 bfd_boolean localsyms
;
7462 bfd_boolean need_second_pass
;
7463 bfd_boolean second_pass
;
7464 struct elf_final_link_info
*flinfo
;
7468 /* Support for evaluating a complex relocation.
7470 Complex relocations are generalized, self-describing relocations. The
7471 implementation of them consists of two parts: complex symbols, and the
7472 relocations themselves.
7474 The relocations are use a reserved elf-wide relocation type code (R_RELC
7475 external / BFD_RELOC_RELC internal) and an encoding of relocation field
7476 information (start bit, end bit, word width, etc) into the addend. This
7477 information is extracted from CGEN-generated operand tables within gas.
7479 Complex symbols are mangled symbols (BSF_RELC external / STT_RELC
7480 internal) representing prefix-notation expressions, including but not
7481 limited to those sorts of expressions normally encoded as addends in the
7482 addend field. The symbol mangling format is:
7485 | <unary-operator> ':' <node>
7486 | <binary-operator> ':' <node> ':' <node>
7489 <literal> := 's' <digits=N> ':' <N character symbol name>
7490 | 'S' <digits=N> ':' <N character section name>
7494 <binary-operator> := as in C
7495 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
7498 set_symbol_value (bfd
*bfd_with_globals
,
7499 Elf_Internal_Sym
*isymbuf
,
7504 struct elf_link_hash_entry
**sym_hashes
;
7505 struct elf_link_hash_entry
*h
;
7506 size_t extsymoff
= locsymcount
;
7508 if (symidx
< locsymcount
)
7510 Elf_Internal_Sym
*sym
;
7512 sym
= isymbuf
+ symidx
;
7513 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
7515 /* It is a local symbol: move it to the
7516 "absolute" section and give it a value. */
7517 sym
->st_shndx
= SHN_ABS
;
7518 sym
->st_value
= val
;
7521 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
7525 /* It is a global symbol: set its link type
7526 to "defined" and give it a value. */
7528 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
7529 h
= sym_hashes
[symidx
- extsymoff
];
7530 while (h
->root
.type
== bfd_link_hash_indirect
7531 || h
->root
.type
== bfd_link_hash_warning
)
7532 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7533 h
->root
.type
= bfd_link_hash_defined
;
7534 h
->root
.u
.def
.value
= val
;
7535 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
7539 resolve_symbol (const char *name
,
7541 struct elf_final_link_info
*flinfo
,
7543 Elf_Internal_Sym
*isymbuf
,
7546 Elf_Internal_Sym
*sym
;
7547 struct bfd_link_hash_entry
*global_entry
;
7548 const char *candidate
= NULL
;
7549 Elf_Internal_Shdr
*symtab_hdr
;
7552 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
7554 for (i
= 0; i
< locsymcount
; ++ i
)
7558 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
7561 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
7562 symtab_hdr
->sh_link
,
7565 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
7566 name
, candidate
, (unsigned long) sym
->st_value
);
7568 if (candidate
&& strcmp (candidate
, name
) == 0)
7570 asection
*sec
= flinfo
->sections
[i
];
7572 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
7573 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
7575 printf ("Found symbol with value %8.8lx\n",
7576 (unsigned long) *result
);
7582 /* Hmm, haven't found it yet. perhaps it is a global. */
7583 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
7584 FALSE
, FALSE
, TRUE
);
7588 if (global_entry
->type
== bfd_link_hash_defined
7589 || global_entry
->type
== bfd_link_hash_defweak
)
7591 *result
= (global_entry
->u
.def
.value
7592 + global_entry
->u
.def
.section
->output_section
->vma
7593 + global_entry
->u
.def
.section
->output_offset
);
7595 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
7596 global_entry
->root
.string
, (unsigned long) *result
);
7605 resolve_section (const char *name
,
7612 for (curr
= sections
; curr
; curr
= curr
->next
)
7613 if (strcmp (curr
->name
, name
) == 0)
7615 *result
= curr
->vma
;
7619 /* Hmm. still haven't found it. try pseudo-section names. */
7620 for (curr
= sections
; curr
; curr
= curr
->next
)
7622 len
= strlen (curr
->name
);
7623 if (len
> strlen (name
))
7626 if (strncmp (curr
->name
, name
, len
) == 0)
7628 if (strncmp (".end", name
+ len
, 4) == 0)
7630 *result
= curr
->vma
+ curr
->size
;
7634 /* Insert more pseudo-section names here, if you like. */
7642 undefined_reference (const char *reftype
, const char *name
)
7644 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
7649 eval_symbol (bfd_vma
*result
,
7652 struct elf_final_link_info
*flinfo
,
7654 Elf_Internal_Sym
*isymbuf
,
7663 const char *sym
= *symp
;
7665 bfd_boolean symbol_is_section
= FALSE
;
7670 if (len
< 1 || len
> sizeof (symbuf
))
7672 bfd_set_error (bfd_error_invalid_operation
);
7685 *result
= strtoul (sym
, (char **) symp
, 16);
7689 symbol_is_section
= TRUE
;
7692 symlen
= strtol (sym
, (char **) symp
, 10);
7693 sym
= *symp
+ 1; /* Skip the trailing ':'. */
7695 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
7697 bfd_set_error (bfd_error_invalid_operation
);
7701 memcpy (symbuf
, sym
, symlen
);
7702 symbuf
[symlen
] = '\0';
7703 *symp
= sym
+ symlen
;
7705 /* Is it always possible, with complex symbols, that gas "mis-guessed"
7706 the symbol as a section, or vice-versa. so we're pretty liberal in our
7707 interpretation here; section means "try section first", not "must be a
7708 section", and likewise with symbol. */
7710 if (symbol_is_section
)
7712 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
)
7713 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7714 isymbuf
, locsymcount
))
7716 undefined_reference ("section", symbuf
);
7722 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7723 isymbuf
, locsymcount
)
7724 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
7727 undefined_reference ("symbol", symbuf
);
7734 /* All that remains are operators. */
7736 #define UNARY_OP(op) \
7737 if (strncmp (sym, #op, strlen (#op)) == 0) \
7739 sym += strlen (#op); \
7743 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7744 isymbuf, locsymcount, signed_p)) \
7747 *result = op ((bfd_signed_vma) a); \
7753 #define BINARY_OP(op) \
7754 if (strncmp (sym, #op, strlen (#op)) == 0) \
7756 sym += strlen (#op); \
7760 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7761 isymbuf, locsymcount, signed_p)) \
7764 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
7765 isymbuf, locsymcount, signed_p)) \
7768 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
7798 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
7799 bfd_set_error (bfd_error_invalid_operation
);
7805 put_value (bfd_vma size
,
7806 unsigned long chunksz
,
7811 location
+= (size
- chunksz
);
7813 for (; size
; size
-= chunksz
, location
-= chunksz
, x
>>= (chunksz
* 8))
7821 bfd_put_8 (input_bfd
, x
, location
);
7824 bfd_put_16 (input_bfd
, x
, location
);
7827 bfd_put_32 (input_bfd
, x
, location
);
7831 bfd_put_64 (input_bfd
, x
, location
);
7841 get_value (bfd_vma size
,
7842 unsigned long chunksz
,
7849 /* Sanity checks. */
7850 BFD_ASSERT (chunksz
<= sizeof (x
)
7853 && (size
% chunksz
) == 0
7854 && input_bfd
!= NULL
7855 && location
!= NULL
);
7857 if (chunksz
== sizeof (x
))
7859 BFD_ASSERT (size
== chunksz
);
7861 /* Make sure that we do not perform an undefined shift operation.
7862 We know that size == chunksz so there will only be one iteration
7863 of the loop below. */
7867 shift
= 8 * chunksz
;
7869 for (; size
; size
-= chunksz
, location
+= chunksz
)
7874 x
= (x
<< shift
) | bfd_get_8 (input_bfd
, location
);
7877 x
= (x
<< shift
) | bfd_get_16 (input_bfd
, location
);
7880 x
= (x
<< shift
) | bfd_get_32 (input_bfd
, location
);
7884 x
= (x
<< shift
) | bfd_get_64 (input_bfd
, location
);
7895 decode_complex_addend (unsigned long *start
, /* in bits */
7896 unsigned long *oplen
, /* in bits */
7897 unsigned long *len
, /* in bits */
7898 unsigned long *wordsz
, /* in bytes */
7899 unsigned long *chunksz
, /* in bytes */
7900 unsigned long *lsb0_p
,
7901 unsigned long *signed_p
,
7902 unsigned long *trunc_p
,
7903 unsigned long encoded
)
7905 * start
= encoded
& 0x3F;
7906 * len
= (encoded
>> 6) & 0x3F;
7907 * oplen
= (encoded
>> 12) & 0x3F;
7908 * wordsz
= (encoded
>> 18) & 0xF;
7909 * chunksz
= (encoded
>> 22) & 0xF;
7910 * lsb0_p
= (encoded
>> 27) & 1;
7911 * signed_p
= (encoded
>> 28) & 1;
7912 * trunc_p
= (encoded
>> 29) & 1;
7915 bfd_reloc_status_type
7916 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
7917 asection
*input_section ATTRIBUTE_UNUSED
,
7919 Elf_Internal_Rela
*rel
,
7922 bfd_vma shift
, x
, mask
;
7923 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
7924 bfd_reloc_status_type r
;
7926 /* Perform this reloc, since it is complex.
7927 (this is not to say that it necessarily refers to a complex
7928 symbol; merely that it is a self-describing CGEN based reloc.
7929 i.e. the addend has the complete reloc information (bit start, end,
7930 word size, etc) encoded within it.). */
7932 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
7933 &chunksz
, &lsb0_p
, &signed_p
,
7934 &trunc_p
, rel
->r_addend
);
7936 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
7939 shift
= (start
+ 1) - len
;
7941 shift
= (8 * wordsz
) - (start
+ len
);
7943 /* FIXME: octets_per_byte. */
7944 x
= get_value (wordsz
, chunksz
, input_bfd
, contents
+ rel
->r_offset
);
7947 printf ("Doing complex reloc: "
7948 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
7949 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
7950 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
7951 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
7952 oplen
, (unsigned long) x
, (unsigned long) mask
,
7953 (unsigned long) relocation
);
7958 /* Now do an overflow check. */
7959 r
= bfd_check_overflow ((signed_p
7960 ? complain_overflow_signed
7961 : complain_overflow_unsigned
),
7962 len
, 0, (8 * wordsz
),
7966 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
7969 printf (" relocation: %8.8lx\n"
7970 " shifted mask: %8.8lx\n"
7971 " shifted/masked reloc: %8.8lx\n"
7972 " result: %8.8lx\n",
7973 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
7974 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
7976 /* FIXME: octets_per_byte. */
7977 put_value (wordsz
, chunksz
, input_bfd
, x
, contents
+ rel
->r_offset
);
7981 /* When performing a relocatable link, the input relocations are
7982 preserved. But, if they reference global symbols, the indices
7983 referenced must be updated. Update all the relocations found in
7987 elf_link_adjust_relocs (bfd
*abfd
,
7988 struct bfd_elf_section_reloc_data
*reldata
)
7991 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7993 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
7994 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
7995 bfd_vma r_type_mask
;
7997 unsigned int count
= reldata
->count
;
7998 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
8000 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
8002 swap_in
= bed
->s
->swap_reloc_in
;
8003 swap_out
= bed
->s
->swap_reloc_out
;
8005 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
8007 swap_in
= bed
->s
->swap_reloca_in
;
8008 swap_out
= bed
->s
->swap_reloca_out
;
8013 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
8016 if (bed
->s
->arch_size
== 32)
8023 r_type_mask
= 0xffffffff;
8027 erela
= reldata
->hdr
->contents
;
8028 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
8030 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
8033 if (*rel_hash
== NULL
)
8036 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
8038 (*swap_in
) (abfd
, erela
, irela
);
8039 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
8040 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
8041 | (irela
[j
].r_info
& r_type_mask
));
8042 (*swap_out
) (abfd
, irela
, erela
);
8046 struct elf_link_sort_rela
8052 enum elf_reloc_type_class type
;
8053 /* We use this as an array of size int_rels_per_ext_rel. */
8054 Elf_Internal_Rela rela
[1];
8058 elf_link_sort_cmp1 (const void *A
, const void *B
)
8060 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8061 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8062 int relativea
, relativeb
;
8064 relativea
= a
->type
== reloc_class_relative
;
8065 relativeb
= b
->type
== reloc_class_relative
;
8067 if (relativea
< relativeb
)
8069 if (relativea
> relativeb
)
8071 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
8073 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
8075 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8077 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8083 elf_link_sort_cmp2 (const void *A
, const void *B
)
8085 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8086 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8088 if (a
->type
< b
->type
)
8090 if (a
->type
> b
->type
)
8092 if (a
->u
.offset
< b
->u
.offset
)
8094 if (a
->u
.offset
> b
->u
.offset
)
8096 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8098 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8104 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
8106 asection
*dynamic_relocs
;
8109 bfd_size_type count
, size
;
8110 size_t i
, ret
, sort_elt
, ext_size
;
8111 bfd_byte
*sort
, *s_non_relative
, *p
;
8112 struct elf_link_sort_rela
*sq
;
8113 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8114 int i2e
= bed
->s
->int_rels_per_ext_rel
;
8115 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8116 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8117 struct bfd_link_order
*lo
;
8119 bfd_boolean use_rela
;
8121 /* Find a dynamic reloc section. */
8122 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
8123 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
8124 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
8125 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8127 bfd_boolean use_rela_initialised
= FALSE
;
8129 /* This is just here to stop gcc from complaining.
8130 It's initialization checking code is not perfect. */
8133 /* Both sections are present. Examine the sizes
8134 of the indirect sections to help us choose. */
8135 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8136 if (lo
->type
== bfd_indirect_link_order
)
8138 asection
*o
= lo
->u
.indirect
.section
;
8140 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8142 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8143 /* Section size is divisible by both rel and rela sizes.
8144 It is of no help to us. */
8148 /* Section size is only divisible by rela. */
8149 if (use_rela_initialised
&& (use_rela
== FALSE
))
8152 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8153 bfd_set_error (bfd_error_invalid_operation
);
8159 use_rela_initialised
= TRUE
;
8163 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8165 /* Section size is only divisible by rel. */
8166 if (use_rela_initialised
&& (use_rela
== TRUE
))
8169 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8170 bfd_set_error (bfd_error_invalid_operation
);
8176 use_rela_initialised
= TRUE
;
8181 /* The section size is not divisible by either - something is wrong. */
8183 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8184 bfd_set_error (bfd_error_invalid_operation
);
8189 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8190 if (lo
->type
== bfd_indirect_link_order
)
8192 asection
*o
= lo
->u
.indirect
.section
;
8194 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8196 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8197 /* Section size is divisible by both rel and rela sizes.
8198 It is of no help to us. */
8202 /* Section size is only divisible by rela. */
8203 if (use_rela_initialised
&& (use_rela
== FALSE
))
8206 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8207 bfd_set_error (bfd_error_invalid_operation
);
8213 use_rela_initialised
= TRUE
;
8217 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8219 /* Section size is only divisible by rel. */
8220 if (use_rela_initialised
&& (use_rela
== TRUE
))
8223 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8224 bfd_set_error (bfd_error_invalid_operation
);
8230 use_rela_initialised
= TRUE
;
8235 /* The section size is not divisible by either - something is wrong. */
8237 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8238 bfd_set_error (bfd_error_invalid_operation
);
8243 if (! use_rela_initialised
)
8247 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
8249 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8256 dynamic_relocs
= rela_dyn
;
8257 ext_size
= bed
->s
->sizeof_rela
;
8258 swap_in
= bed
->s
->swap_reloca_in
;
8259 swap_out
= bed
->s
->swap_reloca_out
;
8263 dynamic_relocs
= rel_dyn
;
8264 ext_size
= bed
->s
->sizeof_rel
;
8265 swap_in
= bed
->s
->swap_reloc_in
;
8266 swap_out
= bed
->s
->swap_reloc_out
;
8270 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8271 if (lo
->type
== bfd_indirect_link_order
)
8272 size
+= lo
->u
.indirect
.section
->size
;
8274 if (size
!= dynamic_relocs
->size
)
8277 sort_elt
= (sizeof (struct elf_link_sort_rela
)
8278 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
8280 count
= dynamic_relocs
->size
/ ext_size
;
8283 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
8287 (*info
->callbacks
->warning
)
8288 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0, 0);
8292 if (bed
->s
->arch_size
== 32)
8293 r_sym_mask
= ~(bfd_vma
) 0xff;
8295 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
8297 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8298 if (lo
->type
== bfd_indirect_link_order
)
8300 bfd_byte
*erel
, *erelend
;
8301 asection
*o
= lo
->u
.indirect
.section
;
8303 if (o
->contents
== NULL
&& o
->size
!= 0)
8305 /* This is a reloc section that is being handled as a normal
8306 section. See bfd_section_from_shdr. We can't combine
8307 relocs in this case. */
8312 erelend
= o
->contents
+ o
->size
;
8313 /* FIXME: octets_per_byte. */
8314 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8316 while (erel
< erelend
)
8318 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8320 (*swap_in
) (abfd
, erel
, s
->rela
);
8321 s
->type
= (*bed
->elf_backend_reloc_type_class
) (info
, o
, s
->rela
);
8322 s
->u
.sym_mask
= r_sym_mask
;
8328 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
8330 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
8332 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8333 if (s
->type
!= reloc_class_relative
)
8339 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
8340 for (; i
< count
; i
++, p
+= sort_elt
)
8342 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
8343 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
8345 sp
->u
.offset
= sq
->rela
->r_offset
;
8348 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
8350 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8351 if (lo
->type
== bfd_indirect_link_order
)
8353 bfd_byte
*erel
, *erelend
;
8354 asection
*o
= lo
->u
.indirect
.section
;
8357 erelend
= o
->contents
+ o
->size
;
8358 /* FIXME: octets_per_byte. */
8359 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8360 while (erel
< erelend
)
8362 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8363 (*swap_out
) (abfd
, s
->rela
, erel
);
8370 *psec
= dynamic_relocs
;
8374 /* Flush the output symbols to the file. */
8377 elf_link_flush_output_syms (struct elf_final_link_info
*flinfo
,
8378 const struct elf_backend_data
*bed
)
8380 if (flinfo
->symbuf_count
> 0)
8382 Elf_Internal_Shdr
*hdr
;
8386 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
8387 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
8388 amt
= flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8389 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) != 0
8390 || bfd_bwrite (flinfo
->symbuf
, amt
, flinfo
->output_bfd
) != amt
)
8393 hdr
->sh_size
+= amt
;
8394 flinfo
->symbuf_count
= 0;
8400 /* Add a symbol to the output symbol table. */
8403 elf_link_output_sym (struct elf_final_link_info
*flinfo
,
8405 Elf_Internal_Sym
*elfsym
,
8406 asection
*input_sec
,
8407 struct elf_link_hash_entry
*h
)
8410 Elf_External_Sym_Shndx
*destshndx
;
8411 int (*output_symbol_hook
)
8412 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
8413 struct elf_link_hash_entry
*);
8414 const struct elf_backend_data
*bed
;
8416 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8417 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
8418 if (output_symbol_hook
!= NULL
)
8420 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
8425 if (name
== NULL
|| *name
== '\0')
8426 elfsym
->st_name
= 0;
8427 else if (input_sec
->flags
& SEC_EXCLUDE
)
8428 elfsym
->st_name
= 0;
8431 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (flinfo
->symstrtab
,
8433 if (elfsym
->st_name
== (unsigned long) -1)
8437 if (flinfo
->symbuf_count
>= flinfo
->symbuf_size
)
8439 if (! elf_link_flush_output_syms (flinfo
, bed
))
8443 dest
= flinfo
->symbuf
+ flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8444 destshndx
= flinfo
->symshndxbuf
;
8445 if (destshndx
!= NULL
)
8447 if (bfd_get_symcount (flinfo
->output_bfd
) >= flinfo
->shndxbuf_size
)
8451 amt
= flinfo
->shndxbuf_size
* sizeof (Elf_External_Sym_Shndx
);
8452 destshndx
= (Elf_External_Sym_Shndx
*) bfd_realloc (destshndx
,
8454 if (destshndx
== NULL
)
8456 flinfo
->symshndxbuf
= destshndx
;
8457 memset ((char *) destshndx
+ amt
, 0, amt
);
8458 flinfo
->shndxbuf_size
*= 2;
8460 destshndx
+= bfd_get_symcount (flinfo
->output_bfd
);
8463 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, elfsym
, dest
, destshndx
);
8464 flinfo
->symbuf_count
+= 1;
8465 bfd_get_symcount (flinfo
->output_bfd
) += 1;
8470 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
8473 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
8475 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
8476 && sym
->st_shndx
< SHN_LORESERVE
)
8478 /* The gABI doesn't support dynamic symbols in output sections
8480 (*_bfd_error_handler
)
8481 (_("%B: Too many sections: %d (>= %d)"),
8482 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
8483 bfd_set_error (bfd_error_nonrepresentable_section
);
8489 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
8490 allowing an unsatisfied unversioned symbol in the DSO to match a
8491 versioned symbol that would normally require an explicit version.
8492 We also handle the case that a DSO references a hidden symbol
8493 which may be satisfied by a versioned symbol in another DSO. */
8496 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
8497 const struct elf_backend_data
*bed
,
8498 struct elf_link_hash_entry
*h
)
8501 struct elf_link_loaded_list
*loaded
;
8503 if (!is_elf_hash_table (info
->hash
))
8506 /* Check indirect symbol. */
8507 while (h
->root
.type
== bfd_link_hash_indirect
)
8508 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8510 switch (h
->root
.type
)
8516 case bfd_link_hash_undefined
:
8517 case bfd_link_hash_undefweak
:
8518 abfd
= h
->root
.u
.undef
.abfd
;
8519 if ((abfd
->flags
& DYNAMIC
) == 0
8520 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
8524 case bfd_link_hash_defined
:
8525 case bfd_link_hash_defweak
:
8526 abfd
= h
->root
.u
.def
.section
->owner
;
8529 case bfd_link_hash_common
:
8530 abfd
= h
->root
.u
.c
.p
->section
->owner
;
8533 BFD_ASSERT (abfd
!= NULL
);
8535 for (loaded
= elf_hash_table (info
)->loaded
;
8537 loaded
= loaded
->next
)
8540 Elf_Internal_Shdr
*hdr
;
8541 bfd_size_type symcount
;
8542 bfd_size_type extsymcount
;
8543 bfd_size_type extsymoff
;
8544 Elf_Internal_Shdr
*versymhdr
;
8545 Elf_Internal_Sym
*isym
;
8546 Elf_Internal_Sym
*isymend
;
8547 Elf_Internal_Sym
*isymbuf
;
8548 Elf_External_Versym
*ever
;
8549 Elf_External_Versym
*extversym
;
8551 input
= loaded
->abfd
;
8553 /* We check each DSO for a possible hidden versioned definition. */
8555 || (input
->flags
& DYNAMIC
) == 0
8556 || elf_dynversym (input
) == 0)
8559 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
8561 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
8562 if (elf_bad_symtab (input
))
8564 extsymcount
= symcount
;
8569 extsymcount
= symcount
- hdr
->sh_info
;
8570 extsymoff
= hdr
->sh_info
;
8573 if (extsymcount
== 0)
8576 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
8578 if (isymbuf
== NULL
)
8581 /* Read in any version definitions. */
8582 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
8583 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
8584 if (extversym
== NULL
)
8587 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
8588 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
8589 != versymhdr
->sh_size
))
8597 ever
= extversym
+ extsymoff
;
8598 isymend
= isymbuf
+ extsymcount
;
8599 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
8602 Elf_Internal_Versym iver
;
8603 unsigned short version_index
;
8605 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
8606 || isym
->st_shndx
== SHN_UNDEF
)
8609 name
= bfd_elf_string_from_elf_section (input
,
8612 if (strcmp (name
, h
->root
.root
.string
) != 0)
8615 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
8617 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
8619 && h
->forced_local
))
8621 /* If we have a non-hidden versioned sym, then it should
8622 have provided a definition for the undefined sym unless
8623 it is defined in a non-shared object and forced local.
8628 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
8629 if (version_index
== 1 || version_index
== 2)
8631 /* This is the base or first version. We can use it. */
8645 /* Add an external symbol to the symbol table. This is called from
8646 the hash table traversal routine. When generating a shared object,
8647 we go through the symbol table twice. The first time we output
8648 anything that might have been forced to local scope in a version
8649 script. The second time we output the symbols that are still
8653 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
8655 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
8656 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
8657 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
8659 Elf_Internal_Sym sym
;
8660 asection
*input_sec
;
8661 const struct elf_backend_data
*bed
;
8665 if (h
->root
.type
== bfd_link_hash_warning
)
8667 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8668 if (h
->root
.type
== bfd_link_hash_new
)
8672 /* Decide whether to output this symbol in this pass. */
8673 if (eoinfo
->localsyms
)
8675 if (!h
->forced_local
)
8677 if (eoinfo
->second_pass
8678 && !((h
->root
.type
== bfd_link_hash_defined
8679 || h
->root
.type
== bfd_link_hash_defweak
)
8680 && h
->root
.u
.def
.section
->output_section
!= NULL
))
8685 if (h
->forced_local
)
8689 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8691 if (h
->root
.type
== bfd_link_hash_undefined
)
8693 /* If we have an undefined symbol reference here then it must have
8694 come from a shared library that is being linked in. (Undefined
8695 references in regular files have already been handled unless
8696 they are in unreferenced sections which are removed by garbage
8698 bfd_boolean ignore_undef
= FALSE
;
8700 /* Some symbols may be special in that the fact that they're
8701 undefined can be safely ignored - let backend determine that. */
8702 if (bed
->elf_backend_ignore_undef_symbol
)
8703 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
8705 /* If we are reporting errors for this situation then do so now. */
8708 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
8709 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
8710 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
8712 if (!(flinfo
->info
->callbacks
->undefined_symbol
8713 (flinfo
->info
, h
->root
.root
.string
,
8714 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
,
8716 (flinfo
->info
->unresolved_syms_in_shared_libs
8717 == RM_GENERATE_ERROR
))))
8719 bfd_set_error (bfd_error_bad_value
);
8720 eoinfo
->failed
= TRUE
;
8726 /* We should also warn if a forced local symbol is referenced from
8727 shared libraries. */
8728 if (!flinfo
->info
->relocatable
8729 && flinfo
->info
->executable
8734 && h
->ref_dynamic_nonweak
8735 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
8739 struct elf_link_hash_entry
*hi
= h
;
8741 /* Check indirect symbol. */
8742 while (hi
->root
.type
== bfd_link_hash_indirect
)
8743 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
8745 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
8746 msg
= _("%B: internal symbol `%s' in %B is referenced by DSO");
8747 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
8748 msg
= _("%B: hidden symbol `%s' in %B is referenced by DSO");
8750 msg
= _("%B: local symbol `%s' in %B is referenced by DSO");
8751 def_bfd
= flinfo
->output_bfd
;
8752 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
8753 def_bfd
= hi
->root
.u
.def
.section
->owner
;
8754 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, def_bfd
,
8755 h
->root
.root
.string
);
8756 bfd_set_error (bfd_error_bad_value
);
8757 eoinfo
->failed
= TRUE
;
8761 /* We don't want to output symbols that have never been mentioned by
8762 a regular file, or that we have been told to strip. However, if
8763 h->indx is set to -2, the symbol is used by a reloc and we must
8767 else if ((h
->def_dynamic
8769 || h
->root
.type
== bfd_link_hash_new
)
8773 else if (flinfo
->info
->strip
== strip_all
)
8775 else if (flinfo
->info
->strip
== strip_some
8776 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
8777 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
8779 else if ((h
->root
.type
== bfd_link_hash_defined
8780 || h
->root
.type
== bfd_link_hash_defweak
)
8781 && ((flinfo
->info
->strip_discarded
8782 && discarded_section (h
->root
.u
.def
.section
))
8783 || (h
->root
.u
.def
.section
->owner
!= NULL
8784 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
8786 else if ((h
->root
.type
== bfd_link_hash_undefined
8787 || h
->root
.type
== bfd_link_hash_undefweak
)
8788 && h
->root
.u
.undef
.abfd
!= NULL
8789 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
8794 /* If we're stripping it, and it's not a dynamic symbol, there's
8795 nothing else to do unless it is a forced local symbol or a
8796 STT_GNU_IFUNC symbol. */
8799 && h
->type
!= STT_GNU_IFUNC
8800 && !h
->forced_local
)
8804 sym
.st_size
= h
->size
;
8805 sym
.st_other
= h
->other
;
8806 if (h
->forced_local
)
8808 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
8809 /* Turn off visibility on local symbol. */
8810 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
8812 /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */
8813 else if (h
->unique_global
&& h
->def_regular
)
8814 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, h
->type
);
8815 else if (h
->root
.type
== bfd_link_hash_undefweak
8816 || h
->root
.type
== bfd_link_hash_defweak
)
8817 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
8819 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
8820 sym
.st_target_internal
= h
->target_internal
;
8822 switch (h
->root
.type
)
8825 case bfd_link_hash_new
:
8826 case bfd_link_hash_warning
:
8830 case bfd_link_hash_undefined
:
8831 case bfd_link_hash_undefweak
:
8832 input_sec
= bfd_und_section_ptr
;
8833 sym
.st_shndx
= SHN_UNDEF
;
8836 case bfd_link_hash_defined
:
8837 case bfd_link_hash_defweak
:
8839 input_sec
= h
->root
.u
.def
.section
;
8840 if (input_sec
->output_section
!= NULL
)
8842 if (eoinfo
->localsyms
&& flinfo
->filesym_count
== 1)
8844 bfd_boolean second_pass_sym
8845 = (input_sec
->owner
== flinfo
->output_bfd
8846 || input_sec
->owner
== NULL
8847 || (input_sec
->flags
& SEC_LINKER_CREATED
) != 0
8848 || (input_sec
->owner
->flags
& BFD_LINKER_CREATED
) != 0);
8850 eoinfo
->need_second_pass
|= second_pass_sym
;
8851 if (eoinfo
->second_pass
!= second_pass_sym
)
8856 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
8857 input_sec
->output_section
);
8858 if (sym
.st_shndx
== SHN_BAD
)
8860 (*_bfd_error_handler
)
8861 (_("%B: could not find output section %A for input section %A"),
8862 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
8863 bfd_set_error (bfd_error_nonrepresentable_section
);
8864 eoinfo
->failed
= TRUE
;
8868 /* ELF symbols in relocatable files are section relative,
8869 but in nonrelocatable files they are virtual
8871 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
8872 if (!flinfo
->info
->relocatable
)
8874 sym
.st_value
+= input_sec
->output_section
->vma
;
8875 if (h
->type
== STT_TLS
)
8877 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
8878 if (tls_sec
!= NULL
)
8879 sym
.st_value
-= tls_sec
->vma
;
8882 /* The TLS section may have been garbage collected. */
8883 BFD_ASSERT (flinfo
->info
->gc_sections
8884 && !input_sec
->gc_mark
);
8891 BFD_ASSERT (input_sec
->owner
== NULL
8892 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
8893 sym
.st_shndx
= SHN_UNDEF
;
8894 input_sec
= bfd_und_section_ptr
;
8899 case bfd_link_hash_common
:
8900 input_sec
= h
->root
.u
.c
.p
->section
;
8901 sym
.st_shndx
= bed
->common_section_index (input_sec
);
8902 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
8905 case bfd_link_hash_indirect
:
8906 /* These symbols are created by symbol versioning. They point
8907 to the decorated version of the name. For example, if the
8908 symbol foo@@GNU_1.2 is the default, which should be used when
8909 foo is used with no version, then we add an indirect symbol
8910 foo which points to foo@@GNU_1.2. We ignore these symbols,
8911 since the indirected symbol is already in the hash table. */
8915 /* Give the processor backend a chance to tweak the symbol value,
8916 and also to finish up anything that needs to be done for this
8917 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
8918 forced local syms when non-shared is due to a historical quirk.
8919 STT_GNU_IFUNC symbol must go through PLT. */
8920 if ((h
->type
== STT_GNU_IFUNC
8922 && !flinfo
->info
->relocatable
)
8923 || ((h
->dynindx
!= -1
8925 && ((flinfo
->info
->shared
8926 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8927 || h
->root
.type
!= bfd_link_hash_undefweak
))
8928 || !h
->forced_local
)
8929 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
8931 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
8932 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
8934 eoinfo
->failed
= TRUE
;
8939 /* If we are marking the symbol as undefined, and there are no
8940 non-weak references to this symbol from a regular object, then
8941 mark the symbol as weak undefined; if there are non-weak
8942 references, mark the symbol as strong. We can't do this earlier,
8943 because it might not be marked as undefined until the
8944 finish_dynamic_symbol routine gets through with it. */
8945 if (sym
.st_shndx
== SHN_UNDEF
8947 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
8948 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
8951 unsigned int type
= ELF_ST_TYPE (sym
.st_info
);
8953 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
8954 if (type
== STT_GNU_IFUNC
)
8957 if (h
->ref_regular_nonweak
)
8958 bindtype
= STB_GLOBAL
;
8960 bindtype
= STB_WEAK
;
8961 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
8964 /* If this is a symbol defined in a dynamic library, don't use the
8965 symbol size from the dynamic library. Relinking an executable
8966 against a new library may introduce gratuitous changes in the
8967 executable's symbols if we keep the size. */
8968 if (sym
.st_shndx
== SHN_UNDEF
8973 /* If a non-weak symbol with non-default visibility is not defined
8974 locally, it is a fatal error. */
8975 if (!flinfo
->info
->relocatable
8976 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
8977 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
8978 && h
->root
.type
== bfd_link_hash_undefined
8983 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
8984 msg
= _("%B: protected symbol `%s' isn't defined");
8985 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
8986 msg
= _("%B: internal symbol `%s' isn't defined");
8988 msg
= _("%B: hidden symbol `%s' isn't defined");
8989 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
8990 bfd_set_error (bfd_error_bad_value
);
8991 eoinfo
->failed
= TRUE
;
8995 /* If this symbol should be put in the .dynsym section, then put it
8996 there now. We already know the symbol index. We also fill in
8997 the entry in the .hash section. */
8998 if (flinfo
->dynsym_sec
!= NULL
9000 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
)
9004 /* Since there is no version information in the dynamic string,
9005 if there is no version info in symbol version section, we will
9006 have a run-time problem. */
9007 if (h
->verinfo
.verdef
== NULL
)
9009 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
9011 if (p
&& p
[1] != '\0')
9013 (*_bfd_error_handler
)
9014 (_("%B: No symbol version section for versioned symbol `%s'"),
9015 flinfo
->output_bfd
, h
->root
.root
.string
);
9016 eoinfo
->failed
= TRUE
;
9021 sym
.st_name
= h
->dynstr_index
;
9022 esym
= flinfo
->dynsym_sec
->contents
+ h
->dynindx
* bed
->s
->sizeof_sym
;
9023 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
9025 eoinfo
->failed
= TRUE
;
9028 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
9030 if (flinfo
->hash_sec
!= NULL
)
9032 size_t hash_entry_size
;
9033 bfd_byte
*bucketpos
;
9038 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
9039 bucket
= h
->u
.elf_hash_value
% bucketcount
;
9042 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
9043 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
9044 + (bucket
+ 2) * hash_entry_size
);
9045 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
9046 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
9048 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
9049 ((bfd_byte
*) flinfo
->hash_sec
->contents
9050 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
9053 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
9055 Elf_Internal_Versym iversym
;
9056 Elf_External_Versym
*eversym
;
9058 if (!h
->def_regular
)
9060 if (h
->verinfo
.verdef
== NULL
)
9061 iversym
.vs_vers
= 0;
9063 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
9067 if (h
->verinfo
.vertree
== NULL
)
9068 iversym
.vs_vers
= 1;
9070 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
9071 if (flinfo
->info
->create_default_symver
)
9076 iversym
.vs_vers
|= VERSYM_HIDDEN
;
9078 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
9079 eversym
+= h
->dynindx
;
9080 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
9084 /* If we're stripping it, then it was just a dynamic symbol, and
9085 there's nothing else to do. */
9086 if (strip
|| (input_sec
->flags
& SEC_EXCLUDE
) != 0)
9089 indx
= bfd_get_symcount (flinfo
->output_bfd
);
9090 ret
= elf_link_output_sym (flinfo
, h
->root
.root
.string
, &sym
, input_sec
, h
);
9093 eoinfo
->failed
= TRUE
;
9098 else if (h
->indx
== -2)
9104 /* Return TRUE if special handling is done for relocs in SEC against
9105 symbols defined in discarded sections. */
9108 elf_section_ignore_discarded_relocs (asection
*sec
)
9110 const struct elf_backend_data
*bed
;
9112 switch (sec
->sec_info_type
)
9114 case SEC_INFO_TYPE_STABS
:
9115 case SEC_INFO_TYPE_EH_FRAME
:
9121 bed
= get_elf_backend_data (sec
->owner
);
9122 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
9123 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
9129 /* Return a mask saying how ld should treat relocations in SEC against
9130 symbols defined in discarded sections. If this function returns
9131 COMPLAIN set, ld will issue a warning message. If this function
9132 returns PRETEND set, and the discarded section was link-once and the
9133 same size as the kept link-once section, ld will pretend that the
9134 symbol was actually defined in the kept section. Otherwise ld will
9135 zero the reloc (at least that is the intent, but some cooperation by
9136 the target dependent code is needed, particularly for REL targets). */
9139 _bfd_elf_default_action_discarded (asection
*sec
)
9141 if (sec
->flags
& SEC_DEBUGGING
)
9144 if (strcmp (".eh_frame", sec
->name
) == 0)
9147 if (strcmp (".gcc_except_table", sec
->name
) == 0)
9150 return COMPLAIN
| PRETEND
;
9153 /* Find a match between a section and a member of a section group. */
9156 match_group_member (asection
*sec
, asection
*group
,
9157 struct bfd_link_info
*info
)
9159 asection
*first
= elf_next_in_group (group
);
9160 asection
*s
= first
;
9164 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
9167 s
= elf_next_in_group (s
);
9175 /* Check if the kept section of a discarded section SEC can be used
9176 to replace it. Return the replacement if it is OK. Otherwise return
9180 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
9184 kept
= sec
->kept_section
;
9187 if ((kept
->flags
& SEC_GROUP
) != 0)
9188 kept
= match_group_member (sec
, kept
, info
);
9190 && ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
9191 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
)))
9193 sec
->kept_section
= kept
;
9198 /* Link an input file into the linker output file. This function
9199 handles all the sections and relocations of the input file at once.
9200 This is so that we only have to read the local symbols once, and
9201 don't have to keep them in memory. */
9204 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
9206 int (*relocate_section
)
9207 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
9208 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
9210 Elf_Internal_Shdr
*symtab_hdr
;
9213 Elf_Internal_Sym
*isymbuf
;
9214 Elf_Internal_Sym
*isym
;
9215 Elf_Internal_Sym
*isymend
;
9217 asection
**ppsection
;
9219 const struct elf_backend_data
*bed
;
9220 struct elf_link_hash_entry
**sym_hashes
;
9221 bfd_size_type address_size
;
9222 bfd_vma r_type_mask
;
9224 bfd_boolean have_file_sym
= FALSE
;
9226 output_bfd
= flinfo
->output_bfd
;
9227 bed
= get_elf_backend_data (output_bfd
);
9228 relocate_section
= bed
->elf_backend_relocate_section
;
9230 /* If this is a dynamic object, we don't want to do anything here:
9231 we don't want the local symbols, and we don't want the section
9233 if ((input_bfd
->flags
& DYNAMIC
) != 0)
9236 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
9237 if (elf_bad_symtab (input_bfd
))
9239 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9244 locsymcount
= symtab_hdr
->sh_info
;
9245 extsymoff
= symtab_hdr
->sh_info
;
9248 /* Read the local symbols. */
9249 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
9250 if (isymbuf
== NULL
&& locsymcount
!= 0)
9252 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
9253 flinfo
->internal_syms
,
9254 flinfo
->external_syms
,
9255 flinfo
->locsym_shndx
);
9256 if (isymbuf
== NULL
)
9260 /* Find local symbol sections and adjust values of symbols in
9261 SEC_MERGE sections. Write out those local symbols we know are
9262 going into the output file. */
9263 isymend
= isymbuf
+ locsymcount
;
9264 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
9266 isym
++, pindex
++, ppsection
++)
9270 Elf_Internal_Sym osym
;
9276 if (elf_bad_symtab (input_bfd
))
9278 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
9285 if (isym
->st_shndx
== SHN_UNDEF
)
9286 isec
= bfd_und_section_ptr
;
9287 else if (isym
->st_shndx
== SHN_ABS
)
9288 isec
= bfd_abs_section_ptr
;
9289 else if (isym
->st_shndx
== SHN_COMMON
)
9290 isec
= bfd_com_section_ptr
;
9293 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
9296 /* Don't attempt to output symbols with st_shnx in the
9297 reserved range other than SHN_ABS and SHN_COMMON. */
9301 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
9302 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
9304 _bfd_merged_section_offset (output_bfd
, &isec
,
9305 elf_section_data (isec
)->sec_info
,
9311 /* Don't output the first, undefined, symbol. */
9312 if (ppsection
== flinfo
->sections
)
9315 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
9317 /* We never output section symbols. Instead, we use the
9318 section symbol of the corresponding section in the output
9323 /* If we are stripping all symbols, we don't want to output this
9325 if (flinfo
->info
->strip
== strip_all
)
9328 /* If we are discarding all local symbols, we don't want to
9329 output this one. If we are generating a relocatable output
9330 file, then some of the local symbols may be required by
9331 relocs; we output them below as we discover that they are
9333 if (flinfo
->info
->discard
== discard_all
)
9336 /* If this symbol is defined in a section which we are
9337 discarding, we don't need to keep it. */
9338 if (isym
->st_shndx
!= SHN_UNDEF
9339 && isym
->st_shndx
< SHN_LORESERVE
9340 && bfd_section_removed_from_list (output_bfd
,
9341 isec
->output_section
))
9344 /* Get the name of the symbol. */
9345 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
9350 /* See if we are discarding symbols with this name. */
9351 if ((flinfo
->info
->strip
== strip_some
9352 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
9354 || (((flinfo
->info
->discard
== discard_sec_merge
9355 && (isec
->flags
& SEC_MERGE
) && !flinfo
->info
->relocatable
)
9356 || flinfo
->info
->discard
== discard_l
)
9357 && bfd_is_local_label_name (input_bfd
, name
)))
9360 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
9362 have_file_sym
= TRUE
;
9363 flinfo
->filesym_count
+= 1;
9367 /* In the absence of debug info, bfd_find_nearest_line uses
9368 FILE symbols to determine the source file for local
9369 function symbols. Provide a FILE symbol here if input
9370 files lack such, so that their symbols won't be
9371 associated with a previous input file. It's not the
9372 source file, but the best we can do. */
9373 have_file_sym
= TRUE
;
9374 flinfo
->filesym_count
+= 1;
9375 memset (&osym
, 0, sizeof (osym
));
9376 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
9377 osym
.st_shndx
= SHN_ABS
;
9378 if (!elf_link_output_sym (flinfo
, input_bfd
->filename
, &osym
,
9379 bfd_abs_section_ptr
, NULL
))
9385 /* Adjust the section index for the output file. */
9386 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9387 isec
->output_section
);
9388 if (osym
.st_shndx
== SHN_BAD
)
9391 /* ELF symbols in relocatable files are section relative, but
9392 in executable files they are virtual addresses. Note that
9393 this code assumes that all ELF sections have an associated
9394 BFD section with a reasonable value for output_offset; below
9395 we assume that they also have a reasonable value for
9396 output_section. Any special sections must be set up to meet
9397 these requirements. */
9398 osym
.st_value
+= isec
->output_offset
;
9399 if (!flinfo
->info
->relocatable
)
9401 osym
.st_value
+= isec
->output_section
->vma
;
9402 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
9404 /* STT_TLS symbols are relative to PT_TLS segment base. */
9405 BFD_ASSERT (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
);
9406 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
9410 indx
= bfd_get_symcount (output_bfd
);
9411 ret
= elf_link_output_sym (flinfo
, name
, &osym
, isec
, NULL
);
9418 if (bed
->s
->arch_size
== 32)
9426 r_type_mask
= 0xffffffff;
9431 /* Relocate the contents of each section. */
9432 sym_hashes
= elf_sym_hashes (input_bfd
);
9433 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
9437 if (! o
->linker_mark
)
9439 /* This section was omitted from the link. */
9443 if (flinfo
->info
->relocatable
9444 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
9446 /* Deal with the group signature symbol. */
9447 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
9448 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
9449 asection
*osec
= o
->output_section
;
9451 if (symndx
>= locsymcount
9452 || (elf_bad_symtab (input_bfd
)
9453 && flinfo
->sections
[symndx
] == NULL
))
9455 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
9456 while (h
->root
.type
== bfd_link_hash_indirect
9457 || h
->root
.type
== bfd_link_hash_warning
)
9458 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9459 /* Arrange for symbol to be output. */
9461 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
9463 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
9465 /* We'll use the output section target_index. */
9466 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9467 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
9471 if (flinfo
->indices
[symndx
] == -1)
9473 /* Otherwise output the local symbol now. */
9474 Elf_Internal_Sym sym
= isymbuf
[symndx
];
9475 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9480 name
= bfd_elf_string_from_elf_section (input_bfd
,
9481 symtab_hdr
->sh_link
,
9486 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9488 if (sym
.st_shndx
== SHN_BAD
)
9491 sym
.st_value
+= o
->output_offset
;
9493 indx
= bfd_get_symcount (output_bfd
);
9494 ret
= elf_link_output_sym (flinfo
, name
, &sym
, o
, NULL
);
9498 flinfo
->indices
[symndx
] = indx
;
9502 elf_section_data (osec
)->this_hdr
.sh_info
9503 = flinfo
->indices
[symndx
];
9507 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
9508 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
9511 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
9513 /* Section was created by _bfd_elf_link_create_dynamic_sections
9518 /* Get the contents of the section. They have been cached by a
9519 relaxation routine. Note that o is a section in an input
9520 file, so the contents field will not have been set by any of
9521 the routines which work on output files. */
9522 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
9523 contents
= elf_section_data (o
)->this_hdr
.contents
;
9526 contents
= flinfo
->contents
;
9527 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
9531 if ((o
->flags
& SEC_RELOC
) != 0)
9533 Elf_Internal_Rela
*internal_relocs
;
9534 Elf_Internal_Rela
*rel
, *relend
;
9535 int action_discarded
;
9538 /* Get the swapped relocs. */
9540 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
9541 flinfo
->internal_relocs
, FALSE
);
9542 if (internal_relocs
== NULL
9543 && o
->reloc_count
> 0)
9546 /* We need to reverse-copy input .ctors/.dtors sections if
9547 they are placed in .init_array/.finit_array for output. */
9548 if (o
->size
> address_size
9549 && ((strncmp (o
->name
, ".ctors", 6) == 0
9550 && strcmp (o
->output_section
->name
,
9551 ".init_array") == 0)
9552 || (strncmp (o
->name
, ".dtors", 6) == 0
9553 && strcmp (o
->output_section
->name
,
9554 ".fini_array") == 0))
9555 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
9557 if (o
->size
!= o
->reloc_count
* address_size
)
9559 (*_bfd_error_handler
)
9560 (_("error: %B: size of section %A is not "
9561 "multiple of address size"),
9563 bfd_set_error (bfd_error_on_input
);
9566 o
->flags
|= SEC_ELF_REVERSE_COPY
;
9569 action_discarded
= -1;
9570 if (!elf_section_ignore_discarded_relocs (o
))
9571 action_discarded
= (*bed
->action_discarded
) (o
);
9573 /* Run through the relocs evaluating complex reloc symbols and
9574 looking for relocs against symbols from discarded sections
9575 or section symbols from removed link-once sections.
9576 Complain about relocs against discarded sections. Zero
9577 relocs against removed link-once sections. */
9579 rel
= internal_relocs
;
9580 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9581 for ( ; rel
< relend
; rel
++)
9583 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
9584 unsigned int s_type
;
9585 asection
**ps
, *sec
;
9586 struct elf_link_hash_entry
*h
= NULL
;
9587 const char *sym_name
;
9589 if (r_symndx
== STN_UNDEF
)
9592 if (r_symndx
>= locsymcount
9593 || (elf_bad_symtab (input_bfd
)
9594 && flinfo
->sections
[r_symndx
] == NULL
))
9596 h
= sym_hashes
[r_symndx
- extsymoff
];
9598 /* Badly formatted input files can contain relocs that
9599 reference non-existant symbols. Check here so that
9600 we do not seg fault. */
9605 sprintf_vma (buffer
, rel
->r_info
);
9606 (*_bfd_error_handler
)
9607 (_("error: %B contains a reloc (0x%s) for section %A "
9608 "that references a non-existent global symbol"),
9609 input_bfd
, o
, buffer
);
9610 bfd_set_error (bfd_error_bad_value
);
9614 while (h
->root
.type
== bfd_link_hash_indirect
9615 || h
->root
.type
== bfd_link_hash_warning
)
9616 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9621 if (h
->root
.type
== bfd_link_hash_defined
9622 || h
->root
.type
== bfd_link_hash_defweak
)
9623 ps
= &h
->root
.u
.def
.section
;
9625 sym_name
= h
->root
.root
.string
;
9629 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
9631 s_type
= ELF_ST_TYPE (sym
->st_info
);
9632 ps
= &flinfo
->sections
[r_symndx
];
9633 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
9637 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
9638 && !flinfo
->info
->relocatable
)
9641 bfd_vma dot
= (rel
->r_offset
9642 + o
->output_offset
+ o
->output_section
->vma
);
9644 printf ("Encountered a complex symbol!");
9645 printf (" (input_bfd %s, section %s, reloc %ld\n",
9646 input_bfd
->filename
, o
->name
,
9647 (long) (rel
- internal_relocs
));
9648 printf (" symbol: idx %8.8lx, name %s\n",
9649 r_symndx
, sym_name
);
9650 printf (" reloc : info %8.8lx, addr %8.8lx\n",
9651 (unsigned long) rel
->r_info
,
9652 (unsigned long) rel
->r_offset
);
9654 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
9655 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
9658 /* Symbol evaluated OK. Update to absolute value. */
9659 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
9664 if (action_discarded
!= -1 && ps
!= NULL
)
9666 /* Complain if the definition comes from a
9667 discarded section. */
9668 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
9670 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
9671 if (action_discarded
& COMPLAIN
)
9672 (*flinfo
->info
->callbacks
->einfo
)
9673 (_("%X`%s' referenced in section `%A' of %B: "
9674 "defined in discarded section `%A' of %B\n"),
9675 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
9677 /* Try to do the best we can to support buggy old
9678 versions of gcc. Pretend that the symbol is
9679 really defined in the kept linkonce section.
9680 FIXME: This is quite broken. Modifying the
9681 symbol here means we will be changing all later
9682 uses of the symbol, not just in this section. */
9683 if (action_discarded
& PRETEND
)
9687 kept
= _bfd_elf_check_kept_section (sec
,
9699 /* Relocate the section by invoking a back end routine.
9701 The back end routine is responsible for adjusting the
9702 section contents as necessary, and (if using Rela relocs
9703 and generating a relocatable output file) adjusting the
9704 reloc addend as necessary.
9706 The back end routine does not have to worry about setting
9707 the reloc address or the reloc symbol index.
9709 The back end routine is given a pointer to the swapped in
9710 internal symbols, and can access the hash table entries
9711 for the external symbols via elf_sym_hashes (input_bfd).
9713 When generating relocatable output, the back end routine
9714 must handle STB_LOCAL/STT_SECTION symbols specially. The
9715 output symbol is going to be a section symbol
9716 corresponding to the output section, which will require
9717 the addend to be adjusted. */
9719 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
9720 input_bfd
, o
, contents
,
9728 || flinfo
->info
->relocatable
9729 || flinfo
->info
->emitrelocations
)
9731 Elf_Internal_Rela
*irela
;
9732 Elf_Internal_Rela
*irelaend
, *irelamid
;
9733 bfd_vma last_offset
;
9734 struct elf_link_hash_entry
**rel_hash
;
9735 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
9736 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
9737 unsigned int next_erel
;
9738 bfd_boolean rela_normal
;
9739 struct bfd_elf_section_data
*esdi
, *esdo
;
9741 esdi
= elf_section_data (o
);
9742 esdo
= elf_section_data (o
->output_section
);
9743 rela_normal
= FALSE
;
9745 /* Adjust the reloc addresses and symbol indices. */
9747 irela
= internal_relocs
;
9748 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9749 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
9750 /* We start processing the REL relocs, if any. When we reach
9751 IRELAMID in the loop, we switch to the RELA relocs. */
9753 if (esdi
->rel
.hdr
!= NULL
)
9754 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
9755 * bed
->s
->int_rels_per_ext_rel
);
9756 rel_hash_list
= rel_hash
;
9757 rela_hash_list
= NULL
;
9758 last_offset
= o
->output_offset
;
9759 if (!flinfo
->info
->relocatable
)
9760 last_offset
+= o
->output_section
->vma
;
9761 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
9763 unsigned long r_symndx
;
9765 Elf_Internal_Sym sym
;
9767 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
9773 if (irela
== irelamid
)
9775 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
9776 rela_hash_list
= rel_hash
;
9777 rela_normal
= bed
->rela_normal
;
9780 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
9783 if (irela
->r_offset
>= (bfd_vma
) -2)
9785 /* This is a reloc for a deleted entry or somesuch.
9786 Turn it into an R_*_NONE reloc, at the same
9787 offset as the last reloc. elf_eh_frame.c and
9788 bfd_elf_discard_info rely on reloc offsets
9790 irela
->r_offset
= last_offset
;
9792 irela
->r_addend
= 0;
9796 irela
->r_offset
+= o
->output_offset
;
9798 /* Relocs in an executable have to be virtual addresses. */
9799 if (!flinfo
->info
->relocatable
)
9800 irela
->r_offset
+= o
->output_section
->vma
;
9802 last_offset
= irela
->r_offset
;
9804 r_symndx
= irela
->r_info
>> r_sym_shift
;
9805 if (r_symndx
== STN_UNDEF
)
9808 if (r_symndx
>= locsymcount
9809 || (elf_bad_symtab (input_bfd
)
9810 && flinfo
->sections
[r_symndx
] == NULL
))
9812 struct elf_link_hash_entry
*rh
;
9815 /* This is a reloc against a global symbol. We
9816 have not yet output all the local symbols, so
9817 we do not know the symbol index of any global
9818 symbol. We set the rel_hash entry for this
9819 reloc to point to the global hash table entry
9820 for this symbol. The symbol index is then
9821 set at the end of bfd_elf_final_link. */
9822 indx
= r_symndx
- extsymoff
;
9823 rh
= elf_sym_hashes (input_bfd
)[indx
];
9824 while (rh
->root
.type
== bfd_link_hash_indirect
9825 || rh
->root
.type
== bfd_link_hash_warning
)
9826 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
9828 /* Setting the index to -2 tells
9829 elf_link_output_extsym that this symbol is
9831 BFD_ASSERT (rh
->indx
< 0);
9839 /* This is a reloc against a local symbol. */
9842 sym
= isymbuf
[r_symndx
];
9843 sec
= flinfo
->sections
[r_symndx
];
9844 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
9846 /* I suppose the backend ought to fill in the
9847 section of any STT_SECTION symbol against a
9848 processor specific section. */
9849 r_symndx
= STN_UNDEF
;
9850 if (bfd_is_abs_section (sec
))
9852 else if (sec
== NULL
|| sec
->owner
== NULL
)
9854 bfd_set_error (bfd_error_bad_value
);
9859 asection
*osec
= sec
->output_section
;
9861 /* If we have discarded a section, the output
9862 section will be the absolute section. In
9863 case of discarded SEC_MERGE sections, use
9864 the kept section. relocate_section should
9865 have already handled discarded linkonce
9867 if (bfd_is_abs_section (osec
)
9868 && sec
->kept_section
!= NULL
9869 && sec
->kept_section
->output_section
!= NULL
)
9871 osec
= sec
->kept_section
->output_section
;
9872 irela
->r_addend
-= osec
->vma
;
9875 if (!bfd_is_abs_section (osec
))
9877 r_symndx
= osec
->target_index
;
9878 if (r_symndx
== STN_UNDEF
)
9880 irela
->r_addend
+= osec
->vma
;
9881 osec
= _bfd_nearby_section (output_bfd
, osec
,
9883 irela
->r_addend
-= osec
->vma
;
9884 r_symndx
= osec
->target_index
;
9889 /* Adjust the addend according to where the
9890 section winds up in the output section. */
9892 irela
->r_addend
+= sec
->output_offset
;
9896 if (flinfo
->indices
[r_symndx
] == -1)
9898 unsigned long shlink
;
9903 if (flinfo
->info
->strip
== strip_all
)
9905 /* You can't do ld -r -s. */
9906 bfd_set_error (bfd_error_invalid_operation
);
9910 /* This symbol was skipped earlier, but
9911 since it is needed by a reloc, we
9912 must output it now. */
9913 shlink
= symtab_hdr
->sh_link
;
9914 name
= (bfd_elf_string_from_elf_section
9915 (input_bfd
, shlink
, sym
.st_name
));
9919 osec
= sec
->output_section
;
9921 _bfd_elf_section_from_bfd_section (output_bfd
,
9923 if (sym
.st_shndx
== SHN_BAD
)
9926 sym
.st_value
+= sec
->output_offset
;
9927 if (!flinfo
->info
->relocatable
)
9929 sym
.st_value
+= osec
->vma
;
9930 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
9932 /* STT_TLS symbols are relative to PT_TLS
9934 BFD_ASSERT (elf_hash_table (flinfo
->info
)
9936 sym
.st_value
-= (elf_hash_table (flinfo
->info
)
9941 indx
= bfd_get_symcount (output_bfd
);
9942 ret
= elf_link_output_sym (flinfo
, name
, &sym
, sec
,
9947 flinfo
->indices
[r_symndx
] = indx
;
9952 r_symndx
= flinfo
->indices
[r_symndx
];
9955 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
9956 | (irela
->r_info
& r_type_mask
));
9959 /* Swap out the relocs. */
9960 input_rel_hdr
= esdi
->rel
.hdr
;
9961 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
9963 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
9968 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
9969 * bed
->s
->int_rels_per_ext_rel
);
9970 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
9973 input_rela_hdr
= esdi
->rela
.hdr
;
9974 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
9976 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
9985 /* Write out the modified section contents. */
9986 if (bed
->elf_backend_write_section
9987 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
9990 /* Section written out. */
9992 else switch (o
->sec_info_type
)
9994 case SEC_INFO_TYPE_STABS
:
9995 if (! (_bfd_write_section_stabs
9997 &elf_hash_table (flinfo
->info
)->stab_info
,
9998 o
, &elf_section_data (o
)->sec_info
, contents
)))
10001 case SEC_INFO_TYPE_MERGE
:
10002 if (! _bfd_write_merged_section (output_bfd
, o
,
10003 elf_section_data (o
)->sec_info
))
10006 case SEC_INFO_TYPE_EH_FRAME
:
10008 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
10015 /* FIXME: octets_per_byte. */
10016 if (! (o
->flags
& SEC_EXCLUDE
))
10018 file_ptr offset
= (file_ptr
) o
->output_offset
;
10019 bfd_size_type todo
= o
->size
;
10020 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
10022 /* Reverse-copy input section to output. */
10025 todo
-= address_size
;
10026 if (! bfd_set_section_contents (output_bfd
,
10034 offset
+= address_size
;
10038 else if (! bfd_set_section_contents (output_bfd
,
10052 /* Generate a reloc when linking an ELF file. This is a reloc
10053 requested by the linker, and does not come from any input file. This
10054 is used to build constructor and destructor tables when linking
10058 elf_reloc_link_order (bfd
*output_bfd
,
10059 struct bfd_link_info
*info
,
10060 asection
*output_section
,
10061 struct bfd_link_order
*link_order
)
10063 reloc_howto_type
*howto
;
10067 struct bfd_elf_section_reloc_data
*reldata
;
10068 struct elf_link_hash_entry
**rel_hash_ptr
;
10069 Elf_Internal_Shdr
*rel_hdr
;
10070 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
10071 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
10074 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
10076 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
10079 bfd_set_error (bfd_error_bad_value
);
10083 addend
= link_order
->u
.reloc
.p
->addend
;
10086 reldata
= &esdo
->rel
;
10087 else if (esdo
->rela
.hdr
)
10088 reldata
= &esdo
->rela
;
10095 /* Figure out the symbol index. */
10096 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
10097 if (link_order
->type
== bfd_section_reloc_link_order
)
10099 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
10100 BFD_ASSERT (indx
!= 0);
10101 *rel_hash_ptr
= NULL
;
10105 struct elf_link_hash_entry
*h
;
10107 /* Treat a reloc against a defined symbol as though it were
10108 actually against the section. */
10109 h
= ((struct elf_link_hash_entry
*)
10110 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
10111 link_order
->u
.reloc
.p
->u
.name
,
10112 FALSE
, FALSE
, TRUE
));
10114 && (h
->root
.type
== bfd_link_hash_defined
10115 || h
->root
.type
== bfd_link_hash_defweak
))
10119 section
= h
->root
.u
.def
.section
;
10120 indx
= section
->output_section
->target_index
;
10121 *rel_hash_ptr
= NULL
;
10122 /* It seems that we ought to add the symbol value to the
10123 addend here, but in practice it has already been added
10124 because it was passed to constructor_callback. */
10125 addend
+= section
->output_section
->vma
+ section
->output_offset
;
10127 else if (h
!= NULL
)
10129 /* Setting the index to -2 tells elf_link_output_extsym that
10130 this symbol is used by a reloc. */
10137 if (! ((*info
->callbacks
->unattached_reloc
)
10138 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0)))
10144 /* If this is an inplace reloc, we must write the addend into the
10146 if (howto
->partial_inplace
&& addend
!= 0)
10148 bfd_size_type size
;
10149 bfd_reloc_status_type rstat
;
10152 const char *sym_name
;
10154 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
10155 buf
= (bfd_byte
*) bfd_zmalloc (size
);
10158 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
10165 case bfd_reloc_outofrange
:
10168 case bfd_reloc_overflow
:
10169 if (link_order
->type
== bfd_section_reloc_link_order
)
10170 sym_name
= bfd_section_name (output_bfd
,
10171 link_order
->u
.reloc
.p
->u
.section
);
10173 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
10174 if (! ((*info
->callbacks
->reloc_overflow
)
10175 (info
, NULL
, sym_name
, howto
->name
, addend
, NULL
,
10176 NULL
, (bfd_vma
) 0)))
10183 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
10184 link_order
->offset
, size
);
10190 /* The address of a reloc is relative to the section in a
10191 relocatable file, and is a virtual address in an executable
10193 offset
= link_order
->offset
;
10194 if (! info
->relocatable
)
10195 offset
+= output_section
->vma
;
10197 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
10199 irel
[i
].r_offset
= offset
;
10200 irel
[i
].r_info
= 0;
10201 irel
[i
].r_addend
= 0;
10203 if (bed
->s
->arch_size
== 32)
10204 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
10206 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
10208 rel_hdr
= reldata
->hdr
;
10209 erel
= rel_hdr
->contents
;
10210 if (rel_hdr
->sh_type
== SHT_REL
)
10212 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
10213 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
10217 irel
[0].r_addend
= addend
;
10218 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
10219 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
10228 /* Get the output vma of the section pointed to by the sh_link field. */
10231 elf_get_linked_section_vma (struct bfd_link_order
*p
)
10233 Elf_Internal_Shdr
**elf_shdrp
;
10237 s
= p
->u
.indirect
.section
;
10238 elf_shdrp
= elf_elfsections (s
->owner
);
10239 elfsec
= _bfd_elf_section_from_bfd_section (s
->owner
, s
);
10240 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
10242 The Intel C compiler generates SHT_IA_64_UNWIND with
10243 SHF_LINK_ORDER. But it doesn't set the sh_link or
10244 sh_info fields. Hence we could get the situation
10245 where elfsec is 0. */
10248 const struct elf_backend_data
*bed
10249 = get_elf_backend_data (s
->owner
);
10250 if (bed
->link_order_error_handler
)
10251 bed
->link_order_error_handler
10252 (_("%B: warning: sh_link not set for section `%A'"), s
->owner
, s
);
10257 s
= elf_shdrp
[elfsec
]->bfd_section
;
10258 return s
->output_section
->vma
+ s
->output_offset
;
10263 /* Compare two sections based on the locations of the sections they are
10264 linked to. Used by elf_fixup_link_order. */
10267 compare_link_order (const void * a
, const void * b
)
10272 apos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)a
);
10273 bpos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)b
);
10276 return apos
> bpos
;
10280 /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
10281 order as their linked sections. Returns false if this could not be done
10282 because an output section includes both ordered and unordered
10283 sections. Ideally we'd do this in the linker proper. */
10286 elf_fixup_link_order (bfd
*abfd
, asection
*o
)
10288 int seen_linkorder
;
10291 struct bfd_link_order
*p
;
10293 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10295 struct bfd_link_order
**sections
;
10296 asection
*s
, *other_sec
, *linkorder_sec
;
10300 linkorder_sec
= NULL
;
10302 seen_linkorder
= 0;
10303 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10305 if (p
->type
== bfd_indirect_link_order
)
10307 s
= p
->u
.indirect
.section
;
10309 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10310 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
10311 && (elfsec
= _bfd_elf_section_from_bfd_section (sub
, s
))
10312 && elfsec
< elf_numsections (sub
)
10313 && elf_elfsections (sub
)[elfsec
]->sh_flags
& SHF_LINK_ORDER
10314 && elf_elfsections (sub
)[elfsec
]->sh_link
< elf_numsections (sub
))
10328 if (seen_other
&& seen_linkorder
)
10330 if (other_sec
&& linkorder_sec
)
10331 (*_bfd_error_handler
) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"),
10333 linkorder_sec
->owner
, other_sec
,
10336 (*_bfd_error_handler
) (_("%A has both ordered and unordered sections"),
10338 bfd_set_error (bfd_error_bad_value
);
10343 if (!seen_linkorder
)
10346 sections
= (struct bfd_link_order
**)
10347 bfd_malloc (seen_linkorder
* sizeof (struct bfd_link_order
*));
10348 if (sections
== NULL
)
10350 seen_linkorder
= 0;
10352 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10354 sections
[seen_linkorder
++] = p
;
10356 /* Sort the input sections in the order of their linked section. */
10357 qsort (sections
, seen_linkorder
, sizeof (struct bfd_link_order
*),
10358 compare_link_order
);
10360 /* Change the offsets of the sections. */
10362 for (n
= 0; n
< seen_linkorder
; n
++)
10364 s
= sections
[n
]->u
.indirect
.section
;
10365 offset
&= ~(bfd_vma
) 0 << s
->alignment_power
;
10366 s
->output_offset
= offset
;
10367 sections
[n
]->offset
= offset
;
10368 /* FIXME: octets_per_byte. */
10369 offset
+= sections
[n
]->size
;
10377 elf_final_link_free (bfd
*obfd
, struct elf_final_link_info
*flinfo
)
10381 if (flinfo
->symstrtab
!= NULL
)
10382 _bfd_stringtab_free (flinfo
->symstrtab
);
10383 if (flinfo
->contents
!= NULL
)
10384 free (flinfo
->contents
);
10385 if (flinfo
->external_relocs
!= NULL
)
10386 free (flinfo
->external_relocs
);
10387 if (flinfo
->internal_relocs
!= NULL
)
10388 free (flinfo
->internal_relocs
);
10389 if (flinfo
->external_syms
!= NULL
)
10390 free (flinfo
->external_syms
);
10391 if (flinfo
->locsym_shndx
!= NULL
)
10392 free (flinfo
->locsym_shndx
);
10393 if (flinfo
->internal_syms
!= NULL
)
10394 free (flinfo
->internal_syms
);
10395 if (flinfo
->indices
!= NULL
)
10396 free (flinfo
->indices
);
10397 if (flinfo
->sections
!= NULL
)
10398 free (flinfo
->sections
);
10399 if (flinfo
->symbuf
!= NULL
)
10400 free (flinfo
->symbuf
);
10401 if (flinfo
->symshndxbuf
!= NULL
)
10402 free (flinfo
->symshndxbuf
);
10403 for (o
= obfd
->sections
; o
!= NULL
; o
= o
->next
)
10405 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10406 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
10407 free (esdo
->rel
.hashes
);
10408 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
10409 free (esdo
->rela
.hashes
);
10413 /* Do the final step of an ELF link. */
10416 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
10418 bfd_boolean dynamic
;
10419 bfd_boolean emit_relocs
;
10421 struct elf_final_link_info flinfo
;
10423 struct bfd_link_order
*p
;
10425 bfd_size_type max_contents_size
;
10426 bfd_size_type max_external_reloc_size
;
10427 bfd_size_type max_internal_reloc_count
;
10428 bfd_size_type max_sym_count
;
10429 bfd_size_type max_sym_shndx_count
;
10431 Elf_Internal_Sym elfsym
;
10433 Elf_Internal_Shdr
*symtab_hdr
;
10434 Elf_Internal_Shdr
*symtab_shndx_hdr
;
10435 Elf_Internal_Shdr
*symstrtab_hdr
;
10436 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10437 struct elf_outext_info eoinfo
;
10438 bfd_boolean merged
;
10439 size_t relativecount
= 0;
10440 asection
*reldyn
= 0;
10442 asection
*attr_section
= NULL
;
10443 bfd_vma attr_size
= 0;
10444 const char *std_attrs_section
;
10446 if (! is_elf_hash_table (info
->hash
))
10450 abfd
->flags
|= DYNAMIC
;
10452 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
10453 dynobj
= elf_hash_table (info
)->dynobj
;
10455 emit_relocs
= (info
->relocatable
10456 || info
->emitrelocations
);
10458 flinfo
.info
= info
;
10459 flinfo
.output_bfd
= abfd
;
10460 flinfo
.symstrtab
= _bfd_elf_stringtab_init ();
10461 if (flinfo
.symstrtab
== NULL
)
10466 flinfo
.dynsym_sec
= NULL
;
10467 flinfo
.hash_sec
= NULL
;
10468 flinfo
.symver_sec
= NULL
;
10472 flinfo
.dynsym_sec
= bfd_get_linker_section (dynobj
, ".dynsym");
10473 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
10474 /* Note that dynsym_sec can be NULL (on VMS). */
10475 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
10476 /* Note that it is OK if symver_sec is NULL. */
10479 flinfo
.contents
= NULL
;
10480 flinfo
.external_relocs
= NULL
;
10481 flinfo
.internal_relocs
= NULL
;
10482 flinfo
.external_syms
= NULL
;
10483 flinfo
.locsym_shndx
= NULL
;
10484 flinfo
.internal_syms
= NULL
;
10485 flinfo
.indices
= NULL
;
10486 flinfo
.sections
= NULL
;
10487 flinfo
.symbuf
= NULL
;
10488 flinfo
.symshndxbuf
= NULL
;
10489 flinfo
.symbuf_count
= 0;
10490 flinfo
.shndxbuf_size
= 0;
10491 flinfo
.filesym_count
= 0;
10493 /* The object attributes have been merged. Remove the input
10494 sections from the link, and set the contents of the output
10496 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
10497 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10499 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
10500 || strcmp (o
->name
, ".gnu.attributes") == 0)
10502 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10504 asection
*input_section
;
10506 if (p
->type
!= bfd_indirect_link_order
)
10508 input_section
= p
->u
.indirect
.section
;
10509 /* Hack: reset the SEC_HAS_CONTENTS flag so that
10510 elf_link_input_bfd ignores this section. */
10511 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
10514 attr_size
= bfd_elf_obj_attr_size (abfd
);
10517 bfd_set_section_size (abfd
, o
, attr_size
);
10519 /* Skip this section later on. */
10520 o
->map_head
.link_order
= NULL
;
10523 o
->flags
|= SEC_EXCLUDE
;
10527 /* Count up the number of relocations we will output for each output
10528 section, so that we know the sizes of the reloc sections. We
10529 also figure out some maximum sizes. */
10530 max_contents_size
= 0;
10531 max_external_reloc_size
= 0;
10532 max_internal_reloc_count
= 0;
10534 max_sym_shndx_count
= 0;
10536 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10538 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10539 o
->reloc_count
= 0;
10541 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10543 unsigned int reloc_count
= 0;
10544 struct bfd_elf_section_data
*esdi
= NULL
;
10546 if (p
->type
== bfd_section_reloc_link_order
10547 || p
->type
== bfd_symbol_reloc_link_order
)
10549 else if (p
->type
== bfd_indirect_link_order
)
10553 sec
= p
->u
.indirect
.section
;
10554 esdi
= elf_section_data (sec
);
10556 /* Mark all sections which are to be included in the
10557 link. This will normally be every section. We need
10558 to do this so that we can identify any sections which
10559 the linker has decided to not include. */
10560 sec
->linker_mark
= TRUE
;
10562 if (sec
->flags
& SEC_MERGE
)
10565 if (esdo
->this_hdr
.sh_type
== SHT_REL
10566 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
10567 /* Some backends use reloc_count in relocation sections
10568 to count particular types of relocs. Of course,
10569 reloc sections themselves can't have relocations. */
10571 else if (info
->relocatable
|| info
->emitrelocations
)
10572 reloc_count
= sec
->reloc_count
;
10573 else if (bed
->elf_backend_count_relocs
)
10574 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
10576 if (sec
->rawsize
> max_contents_size
)
10577 max_contents_size
= sec
->rawsize
;
10578 if (sec
->size
> max_contents_size
)
10579 max_contents_size
= sec
->size
;
10581 /* We are interested in just local symbols, not all
10583 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
10584 && (sec
->owner
->flags
& DYNAMIC
) == 0)
10588 if (elf_bad_symtab (sec
->owner
))
10589 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
10590 / bed
->s
->sizeof_sym
);
10592 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
10594 if (sym_count
> max_sym_count
)
10595 max_sym_count
= sym_count
;
10597 if (sym_count
> max_sym_shndx_count
10598 && elf_symtab_shndx (sec
->owner
) != 0)
10599 max_sym_shndx_count
= sym_count
;
10601 if ((sec
->flags
& SEC_RELOC
) != 0)
10603 size_t ext_size
= 0;
10605 if (esdi
->rel
.hdr
!= NULL
)
10606 ext_size
= esdi
->rel
.hdr
->sh_size
;
10607 if (esdi
->rela
.hdr
!= NULL
)
10608 ext_size
+= esdi
->rela
.hdr
->sh_size
;
10610 if (ext_size
> max_external_reloc_size
)
10611 max_external_reloc_size
= ext_size
;
10612 if (sec
->reloc_count
> max_internal_reloc_count
)
10613 max_internal_reloc_count
= sec
->reloc_count
;
10618 if (reloc_count
== 0)
10621 o
->reloc_count
+= reloc_count
;
10623 if (p
->type
== bfd_indirect_link_order
10624 && (info
->relocatable
|| info
->emitrelocations
))
10627 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
10628 if (esdi
->rela
.hdr
)
10629 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
10634 esdo
->rela
.count
+= reloc_count
;
10636 esdo
->rel
.count
+= reloc_count
;
10640 if (o
->reloc_count
> 0)
10641 o
->flags
|= SEC_RELOC
;
10644 /* Explicitly clear the SEC_RELOC flag. The linker tends to
10645 set it (this is probably a bug) and if it is set
10646 assign_section_numbers will create a reloc section. */
10647 o
->flags
&=~ SEC_RELOC
;
10650 /* If the SEC_ALLOC flag is not set, force the section VMA to
10651 zero. This is done in elf_fake_sections as well, but forcing
10652 the VMA to 0 here will ensure that relocs against these
10653 sections are handled correctly. */
10654 if ((o
->flags
& SEC_ALLOC
) == 0
10655 && ! o
->user_set_vma
)
10659 if (! info
->relocatable
&& merged
)
10660 elf_link_hash_traverse (elf_hash_table (info
),
10661 _bfd_elf_link_sec_merge_syms
, abfd
);
10663 /* Figure out the file positions for everything but the symbol table
10664 and the relocs. We set symcount to force assign_section_numbers
10665 to create a symbol table. */
10666 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
10667 BFD_ASSERT (! abfd
->output_has_begun
);
10668 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
10671 /* Set sizes, and assign file positions for reloc sections. */
10672 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10674 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10675 if ((o
->flags
& SEC_RELOC
) != 0)
10678 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
10682 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
10686 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
10687 to count upwards while actually outputting the relocations. */
10688 esdo
->rel
.count
= 0;
10689 esdo
->rela
.count
= 0;
10692 _bfd_elf_assign_file_positions_for_relocs (abfd
);
10694 /* We have now assigned file positions for all the sections except
10695 .symtab and .strtab. We start the .symtab section at the current
10696 file position, and write directly to it. We build the .strtab
10697 section in memory. */
10698 bfd_get_symcount (abfd
) = 0;
10699 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
10700 /* sh_name is set in prep_headers. */
10701 symtab_hdr
->sh_type
= SHT_SYMTAB
;
10702 /* sh_flags, sh_addr and sh_size all start off zero. */
10703 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
10704 /* sh_link is set in assign_section_numbers. */
10705 /* sh_info is set below. */
10706 /* sh_offset is set just below. */
10707 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
10709 off
= elf_next_file_pos (abfd
);
10710 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
10712 /* Note that at this point elf_next_file_pos (abfd) is
10713 incorrect. We do not yet know the size of the .symtab section.
10714 We correct next_file_pos below, after we do know the size. */
10716 /* Allocate a buffer to hold swapped out symbols. This is to avoid
10717 continuously seeking to the right position in the file. */
10718 if (! info
->keep_memory
|| max_sym_count
< 20)
10719 flinfo
.symbuf_size
= 20;
10721 flinfo
.symbuf_size
= max_sym_count
;
10722 amt
= flinfo
.symbuf_size
;
10723 amt
*= bed
->s
->sizeof_sym
;
10724 flinfo
.symbuf
= (bfd_byte
*) bfd_malloc (amt
);
10725 if (flinfo
.symbuf
== NULL
)
10727 if (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF))
10729 /* Wild guess at number of output symbols. realloc'd as needed. */
10730 amt
= 2 * max_sym_count
+ elf_numsections (abfd
) + 1000;
10731 flinfo
.shndxbuf_size
= amt
;
10732 amt
*= sizeof (Elf_External_Sym_Shndx
);
10733 flinfo
.symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
10734 if (flinfo
.symshndxbuf
== NULL
)
10738 /* Start writing out the symbol table. The first symbol is always a
10740 if (info
->strip
!= strip_all
10743 elfsym
.st_value
= 0;
10744 elfsym
.st_size
= 0;
10745 elfsym
.st_info
= 0;
10746 elfsym
.st_other
= 0;
10747 elfsym
.st_shndx
= SHN_UNDEF
;
10748 elfsym
.st_target_internal
= 0;
10749 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, bfd_und_section_ptr
,
10754 /* Output a symbol for each section. We output these even if we are
10755 discarding local symbols, since they are used for relocs. These
10756 symbols have no names. We store the index of each one in the
10757 index field of the section, so that we can find it again when
10758 outputting relocs. */
10759 if (info
->strip
!= strip_all
10762 elfsym
.st_size
= 0;
10763 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
10764 elfsym
.st_other
= 0;
10765 elfsym
.st_value
= 0;
10766 elfsym
.st_target_internal
= 0;
10767 for (i
= 1; i
< elf_numsections (abfd
); i
++)
10769 o
= bfd_section_from_elf_index (abfd
, i
);
10772 o
->target_index
= bfd_get_symcount (abfd
);
10773 elfsym
.st_shndx
= i
;
10774 if (!info
->relocatable
)
10775 elfsym
.st_value
= o
->vma
;
10776 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, o
, NULL
) != 1)
10782 /* Allocate some memory to hold information read in from the input
10784 if (max_contents_size
!= 0)
10786 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
10787 if (flinfo
.contents
== NULL
)
10791 if (max_external_reloc_size
!= 0)
10793 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
10794 if (flinfo
.external_relocs
== NULL
)
10798 if (max_internal_reloc_count
!= 0)
10800 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
10801 amt
*= sizeof (Elf_Internal_Rela
);
10802 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
10803 if (flinfo
.internal_relocs
== NULL
)
10807 if (max_sym_count
!= 0)
10809 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
10810 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
10811 if (flinfo
.external_syms
== NULL
)
10814 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
10815 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
10816 if (flinfo
.internal_syms
== NULL
)
10819 amt
= max_sym_count
* sizeof (long);
10820 flinfo
.indices
= (long int *) bfd_malloc (amt
);
10821 if (flinfo
.indices
== NULL
)
10824 amt
= max_sym_count
* sizeof (asection
*);
10825 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
10826 if (flinfo
.sections
== NULL
)
10830 if (max_sym_shndx_count
!= 0)
10832 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
10833 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
10834 if (flinfo
.locsym_shndx
== NULL
)
10838 if (elf_hash_table (info
)->tls_sec
)
10840 bfd_vma base
, end
= 0;
10843 for (sec
= elf_hash_table (info
)->tls_sec
;
10844 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
10847 bfd_size_type size
= sec
->size
;
10850 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
10852 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
10855 size
= ord
->offset
+ ord
->size
;
10857 end
= sec
->vma
+ size
;
10859 base
= elf_hash_table (info
)->tls_sec
->vma
;
10860 /* Only align end of TLS section if static TLS doesn't have special
10861 alignment requirements. */
10862 if (bed
->static_tls_alignment
== 1)
10863 end
= align_power (end
,
10864 elf_hash_table (info
)->tls_sec
->alignment_power
);
10865 elf_hash_table (info
)->tls_size
= end
- base
;
10868 /* Reorder SHF_LINK_ORDER sections. */
10869 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10871 if (!elf_fixup_link_order (abfd
, o
))
10875 /* Since ELF permits relocations to be against local symbols, we
10876 must have the local symbols available when we do the relocations.
10877 Since we would rather only read the local symbols once, and we
10878 would rather not keep them in memory, we handle all the
10879 relocations for a single input file at the same time.
10881 Unfortunately, there is no way to know the total number of local
10882 symbols until we have seen all of them, and the local symbol
10883 indices precede the global symbol indices. This means that when
10884 we are generating relocatable output, and we see a reloc against
10885 a global symbol, we can not know the symbol index until we have
10886 finished examining all the local symbols to see which ones we are
10887 going to output. To deal with this, we keep the relocations in
10888 memory, and don't output them until the end of the link. This is
10889 an unfortunate waste of memory, but I don't see a good way around
10890 it. Fortunately, it only happens when performing a relocatable
10891 link, which is not the common case. FIXME: If keep_memory is set
10892 we could write the relocs out and then read them again; I don't
10893 know how bad the memory loss will be. */
10895 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10896 sub
->output_has_begun
= FALSE
;
10897 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10899 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10901 if (p
->type
== bfd_indirect_link_order
10902 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
10903 == bfd_target_elf_flavour
)
10904 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
10906 if (! sub
->output_has_begun
)
10908 if (! elf_link_input_bfd (&flinfo
, sub
))
10910 sub
->output_has_begun
= TRUE
;
10913 else if (p
->type
== bfd_section_reloc_link_order
10914 || p
->type
== bfd_symbol_reloc_link_order
)
10916 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
10921 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
10923 if (p
->type
== bfd_indirect_link_order
10924 && (bfd_get_flavour (sub
)
10925 == bfd_target_elf_flavour
)
10926 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
10927 != bed
->s
->elfclass
))
10929 const char *iclass
, *oclass
;
10931 if (bed
->s
->elfclass
== ELFCLASS64
)
10933 iclass
= "ELFCLASS32";
10934 oclass
= "ELFCLASS64";
10938 iclass
= "ELFCLASS64";
10939 oclass
= "ELFCLASS32";
10942 bfd_set_error (bfd_error_wrong_format
);
10943 (*_bfd_error_handler
)
10944 (_("%B: file class %s incompatible with %s"),
10945 sub
, iclass
, oclass
);
10954 /* Free symbol buffer if needed. */
10955 if (!info
->reduce_memory_overheads
)
10957 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10958 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10959 && elf_tdata (sub
)->symbuf
)
10961 free (elf_tdata (sub
)->symbuf
);
10962 elf_tdata (sub
)->symbuf
= NULL
;
10966 /* Output a FILE symbol so that following locals are not associated
10967 with the wrong input file. */
10968 memset (&elfsym
, 0, sizeof (elfsym
));
10969 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10970 elfsym
.st_shndx
= SHN_ABS
;
10972 if (flinfo
.filesym_count
> 1
10973 && !elf_link_output_sym (&flinfo
, NULL
, &elfsym
,
10974 bfd_und_section_ptr
, NULL
))
10977 /* Output any global symbols that got converted to local in a
10978 version script or due to symbol visibility. We do this in a
10979 separate step since ELF requires all local symbols to appear
10980 prior to any global symbols. FIXME: We should only do this if
10981 some global symbols were, in fact, converted to become local.
10982 FIXME: Will this work correctly with the Irix 5 linker? */
10983 eoinfo
.failed
= FALSE
;
10984 eoinfo
.flinfo
= &flinfo
;
10985 eoinfo
.localsyms
= TRUE
;
10986 eoinfo
.need_second_pass
= FALSE
;
10987 eoinfo
.second_pass
= FALSE
;
10988 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
10992 if (flinfo
.filesym_count
== 1
10993 && !elf_link_output_sym (&flinfo
, NULL
, &elfsym
,
10994 bfd_und_section_ptr
, NULL
))
10997 if (eoinfo
.need_second_pass
)
10999 eoinfo
.second_pass
= TRUE
;
11000 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11005 /* If backend needs to output some local symbols not present in the hash
11006 table, do it now. */
11007 if (bed
->elf_backend_output_arch_local_syms
)
11009 typedef int (*out_sym_func
)
11010 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11011 struct elf_link_hash_entry
*);
11013 if (! ((*bed
->elf_backend_output_arch_local_syms
)
11014 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
11018 /* That wrote out all the local symbols. Finish up the symbol table
11019 with the global symbols. Even if we want to strip everything we
11020 can, we still need to deal with those global symbols that got
11021 converted to local in a version script. */
11023 /* The sh_info field records the index of the first non local symbol. */
11024 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
11027 && flinfo
.dynsym_sec
!= NULL
11028 && flinfo
.dynsym_sec
->output_section
!= bfd_abs_section_ptr
)
11030 Elf_Internal_Sym sym
;
11031 bfd_byte
*dynsym
= flinfo
.dynsym_sec
->contents
;
11032 long last_local
= 0;
11034 /* Write out the section symbols for the output sections. */
11035 if (info
->shared
|| elf_hash_table (info
)->is_relocatable_executable
)
11041 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
11043 sym
.st_target_internal
= 0;
11045 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
11051 dynindx
= elf_section_data (s
)->dynindx
;
11054 indx
= elf_section_data (s
)->this_idx
;
11055 BFD_ASSERT (indx
> 0);
11056 sym
.st_shndx
= indx
;
11057 if (! check_dynsym (abfd
, &sym
))
11059 sym
.st_value
= s
->vma
;
11060 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
11061 if (last_local
< dynindx
)
11062 last_local
= dynindx
;
11063 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11067 /* Write out the local dynsyms. */
11068 if (elf_hash_table (info
)->dynlocal
)
11070 struct elf_link_local_dynamic_entry
*e
;
11071 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
11076 /* Copy the internal symbol and turn off visibility.
11077 Note that we saved a word of storage and overwrote
11078 the original st_name with the dynstr_index. */
11080 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
11082 s
= bfd_section_from_elf_index (e
->input_bfd
,
11087 elf_section_data (s
->output_section
)->this_idx
;
11088 if (! check_dynsym (abfd
, &sym
))
11090 sym
.st_value
= (s
->output_section
->vma
11092 + e
->isym
.st_value
);
11095 if (last_local
< e
->dynindx
)
11096 last_local
= e
->dynindx
;
11098 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
11099 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11103 elf_section_data (flinfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
11107 /* We get the global symbols from the hash table. */
11108 eoinfo
.failed
= FALSE
;
11109 eoinfo
.localsyms
= FALSE
;
11110 eoinfo
.flinfo
= &flinfo
;
11111 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11115 /* If backend needs to output some symbols not present in the hash
11116 table, do it now. */
11117 if (bed
->elf_backend_output_arch_syms
)
11119 typedef int (*out_sym_func
)
11120 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11121 struct elf_link_hash_entry
*);
11123 if (! ((*bed
->elf_backend_output_arch_syms
)
11124 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
11128 /* Flush all symbols to the file. */
11129 if (! elf_link_flush_output_syms (&flinfo
, bed
))
11132 /* Now we know the size of the symtab section. */
11133 off
+= symtab_hdr
->sh_size
;
11135 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
11136 if (symtab_shndx_hdr
->sh_name
!= 0)
11138 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
11139 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
11140 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
11141 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
11142 symtab_shndx_hdr
->sh_size
= amt
;
11144 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
11147 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
11148 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
11153 /* Finish up and write out the symbol string table (.strtab)
11155 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
11156 /* sh_name was set in prep_headers. */
11157 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
11158 symstrtab_hdr
->sh_flags
= 0;
11159 symstrtab_hdr
->sh_addr
= 0;
11160 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (flinfo
.symstrtab
);
11161 symstrtab_hdr
->sh_entsize
= 0;
11162 symstrtab_hdr
->sh_link
= 0;
11163 symstrtab_hdr
->sh_info
= 0;
11164 /* sh_offset is set just below. */
11165 symstrtab_hdr
->sh_addralign
= 1;
11167 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, TRUE
);
11168 elf_next_file_pos (abfd
) = off
;
11170 if (bfd_get_symcount (abfd
) > 0)
11172 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
11173 || ! _bfd_stringtab_emit (abfd
, flinfo
.symstrtab
))
11177 /* Adjust the relocs to have the correct symbol indices. */
11178 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11180 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11181 if ((o
->flags
& SEC_RELOC
) == 0)
11184 if (esdo
->rel
.hdr
!= NULL
)
11185 elf_link_adjust_relocs (abfd
, &esdo
->rel
);
11186 if (esdo
->rela
.hdr
!= NULL
)
11187 elf_link_adjust_relocs (abfd
, &esdo
->rela
);
11189 /* Set the reloc_count field to 0 to prevent write_relocs from
11190 trying to swap the relocs out itself. */
11191 o
->reloc_count
= 0;
11194 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
11195 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
11197 /* If we are linking against a dynamic object, or generating a
11198 shared library, finish up the dynamic linking information. */
11201 bfd_byte
*dyncon
, *dynconend
;
11203 /* Fix up .dynamic entries. */
11204 o
= bfd_get_linker_section (dynobj
, ".dynamic");
11205 BFD_ASSERT (o
!= NULL
);
11207 dyncon
= o
->contents
;
11208 dynconend
= o
->contents
+ o
->size
;
11209 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11211 Elf_Internal_Dyn dyn
;
11215 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11222 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
11224 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
11226 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
11227 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
11230 dyn
.d_un
.d_val
= relativecount
;
11237 name
= info
->init_function
;
11240 name
= info
->fini_function
;
11243 struct elf_link_hash_entry
*h
;
11245 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
11246 FALSE
, FALSE
, TRUE
);
11248 && (h
->root
.type
== bfd_link_hash_defined
11249 || h
->root
.type
== bfd_link_hash_defweak
))
11251 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
11252 o
= h
->root
.u
.def
.section
;
11253 if (o
->output_section
!= NULL
)
11254 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
11255 + o
->output_offset
);
11258 /* The symbol is imported from another shared
11259 library and does not apply to this one. */
11260 dyn
.d_un
.d_ptr
= 0;
11267 case DT_PREINIT_ARRAYSZ
:
11268 name
= ".preinit_array";
11270 case DT_INIT_ARRAYSZ
:
11271 name
= ".init_array";
11273 case DT_FINI_ARRAYSZ
:
11274 name
= ".fini_array";
11276 o
= bfd_get_section_by_name (abfd
, name
);
11279 (*_bfd_error_handler
)
11280 (_("%B: could not find output section %s"), abfd
, name
);
11284 (*_bfd_error_handler
)
11285 (_("warning: %s section has zero size"), name
);
11286 dyn
.d_un
.d_val
= o
->size
;
11289 case DT_PREINIT_ARRAY
:
11290 name
= ".preinit_array";
11292 case DT_INIT_ARRAY
:
11293 name
= ".init_array";
11295 case DT_FINI_ARRAY
:
11296 name
= ".fini_array";
11303 name
= ".gnu.hash";
11312 name
= ".gnu.version_d";
11315 name
= ".gnu.version_r";
11318 name
= ".gnu.version";
11320 o
= bfd_get_section_by_name (abfd
, name
);
11323 (*_bfd_error_handler
)
11324 (_("%B: could not find output section %s"), abfd
, name
);
11327 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
11329 (*_bfd_error_handler
)
11330 (_("warning: section '%s' is being made into a note"), name
);
11331 bfd_set_error (bfd_error_nonrepresentable_section
);
11334 dyn
.d_un
.d_ptr
= o
->vma
;
11341 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
11345 dyn
.d_un
.d_val
= 0;
11346 dyn
.d_un
.d_ptr
= 0;
11347 for (i
= 1; i
< elf_numsections (abfd
); i
++)
11349 Elf_Internal_Shdr
*hdr
;
11351 hdr
= elf_elfsections (abfd
)[i
];
11352 if (hdr
->sh_type
== type
11353 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
11355 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
11356 dyn
.d_un
.d_val
+= hdr
->sh_size
;
11359 if (dyn
.d_un
.d_ptr
== 0
11360 || hdr
->sh_addr
< dyn
.d_un
.d_ptr
)
11361 dyn
.d_un
.d_ptr
= hdr
->sh_addr
;
11367 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
11371 /* If we have created any dynamic sections, then output them. */
11372 if (dynobj
!= NULL
)
11374 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
11377 /* Check for DT_TEXTREL (late, in case the backend removes it). */
11378 if (((info
->warn_shared_textrel
&& info
->shared
)
11379 || info
->error_textrel
)
11380 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
11382 bfd_byte
*dyncon
, *dynconend
;
11384 dyncon
= o
->contents
;
11385 dynconend
= o
->contents
+ o
->size
;
11386 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11388 Elf_Internal_Dyn dyn
;
11390 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11392 if (dyn
.d_tag
== DT_TEXTREL
)
11394 if (info
->error_textrel
)
11395 info
->callbacks
->einfo
11396 (_("%P%X: read-only segment has dynamic relocations.\n"));
11398 info
->callbacks
->einfo
11399 (_("%P: warning: creating a DT_TEXTREL in a shared object.\n"));
11405 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
11407 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
11409 || o
->output_section
== bfd_abs_section_ptr
)
11411 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
11413 /* At this point, we are only interested in sections
11414 created by _bfd_elf_link_create_dynamic_sections. */
11417 if (elf_hash_table (info
)->stab_info
.stabstr
== o
)
11419 if (elf_hash_table (info
)->eh_info
.hdr_sec
== o
)
11421 if (strcmp (o
->name
, ".dynstr") != 0)
11423 /* FIXME: octets_per_byte. */
11424 if (! bfd_set_section_contents (abfd
, o
->output_section
,
11426 (file_ptr
) o
->output_offset
,
11432 /* The contents of the .dynstr section are actually in a
11434 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
11435 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
11436 || ! _bfd_elf_strtab_emit (abfd
,
11437 elf_hash_table (info
)->dynstr
))
11443 if (info
->relocatable
)
11445 bfd_boolean failed
= FALSE
;
11447 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
11452 /* If we have optimized stabs strings, output them. */
11453 if (elf_hash_table (info
)->stab_info
.stabstr
!= NULL
)
11455 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
11459 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
11462 elf_final_link_free (abfd
, &flinfo
);
11464 elf_linker (abfd
) = TRUE
;
11468 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
11469 if (contents
== NULL
)
11470 return FALSE
; /* Bail out and fail. */
11471 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
11472 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
11479 elf_final_link_free (abfd
, &flinfo
);
11483 /* Initialize COOKIE for input bfd ABFD. */
11486 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
11487 struct bfd_link_info
*info
, bfd
*abfd
)
11489 Elf_Internal_Shdr
*symtab_hdr
;
11490 const struct elf_backend_data
*bed
;
11492 bed
= get_elf_backend_data (abfd
);
11493 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11495 cookie
->abfd
= abfd
;
11496 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
11497 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
11498 if (cookie
->bad_symtab
)
11500 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
11501 cookie
->extsymoff
= 0;
11505 cookie
->locsymcount
= symtab_hdr
->sh_info
;
11506 cookie
->extsymoff
= symtab_hdr
->sh_info
;
11509 if (bed
->s
->arch_size
== 32)
11510 cookie
->r_sym_shift
= 8;
11512 cookie
->r_sym_shift
= 32;
11514 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
11515 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
11517 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
11518 cookie
->locsymcount
, 0,
11520 if (cookie
->locsyms
== NULL
)
11522 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
11525 if (info
->keep_memory
)
11526 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
11531 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
11534 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
11536 Elf_Internal_Shdr
*symtab_hdr
;
11538 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11539 if (cookie
->locsyms
!= NULL
11540 && symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
11541 free (cookie
->locsyms
);
11544 /* Initialize the relocation information in COOKIE for input section SEC
11545 of input bfd ABFD. */
11548 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11549 struct bfd_link_info
*info
, bfd
*abfd
,
11552 const struct elf_backend_data
*bed
;
11554 if (sec
->reloc_count
== 0)
11556 cookie
->rels
= NULL
;
11557 cookie
->relend
= NULL
;
11561 bed
= get_elf_backend_data (abfd
);
11563 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
11564 info
->keep_memory
);
11565 if (cookie
->rels
== NULL
)
11567 cookie
->rel
= cookie
->rels
;
11568 cookie
->relend
= (cookie
->rels
11569 + sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
);
11571 cookie
->rel
= cookie
->rels
;
11575 /* Free the memory allocated by init_reloc_cookie_rels,
11579 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11582 if (cookie
->rels
&& elf_section_data (sec
)->relocs
!= cookie
->rels
)
11583 free (cookie
->rels
);
11586 /* Initialize the whole of COOKIE for input section SEC. */
11589 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11590 struct bfd_link_info
*info
,
11593 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
11595 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
11600 fini_reloc_cookie (cookie
, sec
->owner
);
11605 /* Free the memory allocated by init_reloc_cookie_for_section,
11609 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11612 fini_reloc_cookie_rels (cookie
, sec
);
11613 fini_reloc_cookie (cookie
, sec
->owner
);
11616 /* Garbage collect unused sections. */
11618 /* Default gc_mark_hook. */
11621 _bfd_elf_gc_mark_hook (asection
*sec
,
11622 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
11623 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
11624 struct elf_link_hash_entry
*h
,
11625 Elf_Internal_Sym
*sym
)
11627 const char *sec_name
;
11631 switch (h
->root
.type
)
11633 case bfd_link_hash_defined
:
11634 case bfd_link_hash_defweak
:
11635 return h
->root
.u
.def
.section
;
11637 case bfd_link_hash_common
:
11638 return h
->root
.u
.c
.p
->section
;
11640 case bfd_link_hash_undefined
:
11641 case bfd_link_hash_undefweak
:
11642 /* To work around a glibc bug, keep all XXX input sections
11643 when there is an as yet undefined reference to __start_XXX
11644 or __stop_XXX symbols. The linker will later define such
11645 symbols for orphan input sections that have a name
11646 representable as a C identifier. */
11647 if (strncmp (h
->root
.root
.string
, "__start_", 8) == 0)
11648 sec_name
= h
->root
.root
.string
+ 8;
11649 else if (strncmp (h
->root
.root
.string
, "__stop_", 7) == 0)
11650 sec_name
= h
->root
.root
.string
+ 7;
11654 if (sec_name
&& *sec_name
!= '\0')
11658 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
11660 sec
= bfd_get_section_by_name (i
, sec_name
);
11662 sec
->flags
|= SEC_KEEP
;
11672 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
11677 /* COOKIE->rel describes a relocation against section SEC, which is
11678 a section we've decided to keep. Return the section that contains
11679 the relocation symbol, or NULL if no section contains it. */
11682 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
11683 elf_gc_mark_hook_fn gc_mark_hook
,
11684 struct elf_reloc_cookie
*cookie
)
11686 unsigned long r_symndx
;
11687 struct elf_link_hash_entry
*h
;
11689 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
11690 if (r_symndx
== STN_UNDEF
)
11693 if (r_symndx
>= cookie
->locsymcount
11694 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
11696 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
11697 while (h
->root
.type
== bfd_link_hash_indirect
11698 || h
->root
.type
== bfd_link_hash_warning
)
11699 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11701 /* If this symbol is weak and there is a non-weak definition, we
11702 keep the non-weak definition because many backends put
11703 dynamic reloc info on the non-weak definition for code
11704 handling copy relocs. */
11705 if (h
->u
.weakdef
!= NULL
)
11706 h
->u
.weakdef
->mark
= 1;
11707 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
11710 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
11711 &cookie
->locsyms
[r_symndx
]);
11714 /* COOKIE->rel describes a relocation against section SEC, which is
11715 a section we've decided to keep. Mark the section that contains
11716 the relocation symbol. */
11719 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
11721 elf_gc_mark_hook_fn gc_mark_hook
,
11722 struct elf_reloc_cookie
*cookie
)
11726 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
);
11727 if (rsec
&& !rsec
->gc_mark
)
11729 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
11730 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
11732 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
11738 /* The mark phase of garbage collection. For a given section, mark
11739 it and any sections in this section's group, and all the sections
11740 which define symbols to which it refers. */
11743 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
11745 elf_gc_mark_hook_fn gc_mark_hook
)
11748 asection
*group_sec
, *eh_frame
;
11752 /* Mark all the sections in the group. */
11753 group_sec
= elf_section_data (sec
)->next_in_group
;
11754 if (group_sec
&& !group_sec
->gc_mark
)
11755 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
11758 /* Look through the section relocs. */
11760 eh_frame
= elf_eh_frame_section (sec
->owner
);
11761 if ((sec
->flags
& SEC_RELOC
) != 0
11762 && sec
->reloc_count
> 0
11763 && sec
!= eh_frame
)
11765 struct elf_reloc_cookie cookie
;
11767 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
11771 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
11772 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
11777 fini_reloc_cookie_for_section (&cookie
, sec
);
11781 if (ret
&& eh_frame
&& elf_fde_list (sec
))
11783 struct elf_reloc_cookie cookie
;
11785 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
11789 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
11790 gc_mark_hook
, &cookie
))
11792 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
11799 /* Keep debug and special sections. */
11802 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
11803 elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED
)
11807 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11810 bfd_boolean some_kept
;
11811 bfd_boolean debug_frag_seen
;
11813 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
11816 /* Ensure all linker created sections are kept,
11817 see if any other section is already marked,
11818 and note if we have any fragmented debug sections. */
11819 debug_frag_seen
= some_kept
= FALSE
;
11820 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11822 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
11824 else if (isec
->gc_mark
)
11827 if (debug_frag_seen
== FALSE
11828 && (isec
->flags
& SEC_DEBUGGING
)
11829 && CONST_STRNEQ (isec
->name
, ".debug_line."))
11830 debug_frag_seen
= TRUE
;
11833 /* If no section in this file will be kept, then we can
11834 toss out the debug and special sections. */
11838 /* Keep debug and special sections like .comment when they are
11839 not part of a group, or when we have single-member groups. */
11840 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11841 if ((elf_next_in_group (isec
) == NULL
11842 || elf_next_in_group (isec
) == isec
)
11843 && ((isec
->flags
& SEC_DEBUGGING
) != 0
11844 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0))
11847 if (! debug_frag_seen
)
11850 /* Look for CODE sections which are going to be discarded,
11851 and find and discard any fragmented debug sections which
11852 are associated with that code section. */
11853 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11854 if ((isec
->flags
& SEC_CODE
) != 0
11855 && isec
->gc_mark
== 0)
11860 ilen
= strlen (isec
->name
);
11862 /* Association is determined by the name of the debug section
11863 containing the name of the code section as a suffix. For
11864 example .debug_line.text.foo is a debug section associated
11866 for (dsec
= ibfd
->sections
; dsec
!= NULL
; dsec
= dsec
->next
)
11870 if (dsec
->gc_mark
== 0
11871 || (dsec
->flags
& SEC_DEBUGGING
) == 0)
11874 dlen
= strlen (dsec
->name
);
11877 && strncmp (dsec
->name
+ (dlen
- ilen
),
11878 isec
->name
, ilen
) == 0)
11889 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
11891 struct elf_gc_sweep_symbol_info
11893 struct bfd_link_info
*info
;
11894 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
11899 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
11902 && (((h
->root
.type
== bfd_link_hash_defined
11903 || h
->root
.type
== bfd_link_hash_defweak
)
11904 && !(h
->def_regular
11905 && h
->root
.u
.def
.section
->gc_mark
))
11906 || h
->root
.type
== bfd_link_hash_undefined
11907 || h
->root
.type
== bfd_link_hash_undefweak
))
11909 struct elf_gc_sweep_symbol_info
*inf
;
11911 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
11912 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
11913 h
->def_regular
= 0;
11914 h
->ref_regular
= 0;
11915 h
->ref_regular_nonweak
= 0;
11921 /* The sweep phase of garbage collection. Remove all garbage sections. */
11923 typedef bfd_boolean (*gc_sweep_hook_fn
)
11924 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
11927 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
11930 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11931 gc_sweep_hook_fn gc_sweep_hook
= bed
->gc_sweep_hook
;
11932 unsigned long section_sym_count
;
11933 struct elf_gc_sweep_symbol_info sweep_info
;
11935 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
11939 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
11942 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
11944 /* When any section in a section group is kept, we keep all
11945 sections in the section group. If the first member of
11946 the section group is excluded, we will also exclude the
11948 if (o
->flags
& SEC_GROUP
)
11950 asection
*first
= elf_next_in_group (o
);
11951 o
->gc_mark
= first
->gc_mark
;
11957 /* Skip sweeping sections already excluded. */
11958 if (o
->flags
& SEC_EXCLUDE
)
11961 /* Since this is early in the link process, it is simple
11962 to remove a section from the output. */
11963 o
->flags
|= SEC_EXCLUDE
;
11965 if (info
->print_gc_sections
&& o
->size
!= 0)
11966 _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub
, o
->name
);
11968 /* But we also have to update some of the relocation
11969 info we collected before. */
11971 && (o
->flags
& SEC_RELOC
) != 0
11972 && o
->reloc_count
> 0
11973 && !bfd_is_abs_section (o
->output_section
))
11975 Elf_Internal_Rela
*internal_relocs
;
11979 = _bfd_elf_link_read_relocs (o
->owner
, o
, NULL
, NULL
,
11980 info
->keep_memory
);
11981 if (internal_relocs
== NULL
)
11984 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
11986 if (elf_section_data (o
)->relocs
!= internal_relocs
)
11987 free (internal_relocs
);
11995 /* Remove the symbols that were in the swept sections from the dynamic
11996 symbol table. GCFIXME: Anyone know how to get them out of the
11997 static symbol table as well? */
11998 sweep_info
.info
= info
;
11999 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
12000 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
12003 _bfd_elf_link_renumber_dynsyms (abfd
, info
, §ion_sym_count
);
12007 /* Propagate collected vtable information. This is called through
12008 elf_link_hash_traverse. */
12011 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
12013 /* Those that are not vtables. */
12014 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12017 /* Those vtables that do not have parents, we cannot merge. */
12018 if (h
->vtable
->parent
== (struct elf_link_hash_entry
*) -1)
12021 /* If we've already been done, exit. */
12022 if (h
->vtable
->used
&& h
->vtable
->used
[-1])
12025 /* Make sure the parent's table is up to date. */
12026 elf_gc_propagate_vtable_entries_used (h
->vtable
->parent
, okp
);
12028 if (h
->vtable
->used
== NULL
)
12030 /* None of this table's entries were referenced. Re-use the
12032 h
->vtable
->used
= h
->vtable
->parent
->vtable
->used
;
12033 h
->vtable
->size
= h
->vtable
->parent
->vtable
->size
;
12038 bfd_boolean
*cu
, *pu
;
12040 /* Or the parent's entries into ours. */
12041 cu
= h
->vtable
->used
;
12043 pu
= h
->vtable
->parent
->vtable
->used
;
12046 const struct elf_backend_data
*bed
;
12047 unsigned int log_file_align
;
12049 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
12050 log_file_align
= bed
->s
->log_file_align
;
12051 n
= h
->vtable
->parent
->vtable
->size
>> log_file_align
;
12066 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
12069 bfd_vma hstart
, hend
;
12070 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
12071 const struct elf_backend_data
*bed
;
12072 unsigned int log_file_align
;
12074 /* Take care of both those symbols that do not describe vtables as
12075 well as those that are not loaded. */
12076 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12079 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
12080 || h
->root
.type
== bfd_link_hash_defweak
);
12082 sec
= h
->root
.u
.def
.section
;
12083 hstart
= h
->root
.u
.def
.value
;
12084 hend
= hstart
+ h
->size
;
12086 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
12088 return *(bfd_boolean
*) okp
= FALSE
;
12089 bed
= get_elf_backend_data (sec
->owner
);
12090 log_file_align
= bed
->s
->log_file_align
;
12092 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
12094 for (rel
= relstart
; rel
< relend
; ++rel
)
12095 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
12097 /* If the entry is in use, do nothing. */
12098 if (h
->vtable
->used
12099 && (rel
->r_offset
- hstart
) < h
->vtable
->size
)
12101 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
12102 if (h
->vtable
->used
[entry
])
12105 /* Otherwise, kill it. */
12106 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
12112 /* Mark sections containing dynamically referenced symbols. When
12113 building shared libraries, we must assume that any visible symbol is
12117 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
12119 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
12121 if ((h
->root
.type
== bfd_link_hash_defined
12122 || h
->root
.type
== bfd_link_hash_defweak
)
12124 || ((!info
->executable
|| info
->export_dynamic
)
12126 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
12127 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
12128 && (strchr (h
->root
.root
.string
, ELF_VER_CHR
) != NULL
12129 || !bfd_hide_sym_by_version (info
->version_info
,
12130 h
->root
.root
.string
)))))
12131 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12136 /* Keep all sections containing symbols undefined on the command-line,
12137 and the section containing the entry symbol. */
12140 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
12142 struct bfd_sym_chain
*sym
;
12144 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
12146 struct elf_link_hash_entry
*h
;
12148 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
12149 FALSE
, FALSE
, FALSE
);
12152 && (h
->root
.type
== bfd_link_hash_defined
12153 || h
->root
.type
== bfd_link_hash_defweak
)
12154 && !bfd_is_abs_section (h
->root
.u
.def
.section
))
12155 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12159 /* Do mark and sweep of unused sections. */
12162 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
12164 bfd_boolean ok
= TRUE
;
12166 elf_gc_mark_hook_fn gc_mark_hook
;
12167 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12169 if (!bed
->can_gc_sections
12170 || !is_elf_hash_table (info
->hash
))
12172 (*_bfd_error_handler
)(_("Warning: gc-sections option ignored"));
12176 bed
->gc_keep (info
);
12178 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
12179 at the .eh_frame section if we can mark the FDEs individually. */
12180 _bfd_elf_begin_eh_frame_parsing (info
);
12181 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12184 struct elf_reloc_cookie cookie
;
12186 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
12187 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
12189 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
12190 if (elf_section_data (sec
)->sec_info
12191 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
12192 elf_eh_frame_section (sub
) = sec
;
12193 fini_reloc_cookie_for_section (&cookie
, sec
);
12194 sec
= bfd_get_next_section_by_name (sec
);
12197 _bfd_elf_end_eh_frame_parsing (info
);
12199 /* Apply transitive closure to the vtable entry usage info. */
12200 elf_link_hash_traverse (elf_hash_table (info
),
12201 elf_gc_propagate_vtable_entries_used
,
12206 /* Kill the vtable relocations that were not used. */
12207 elf_link_hash_traverse (elf_hash_table (info
),
12208 elf_gc_smash_unused_vtentry_relocs
,
12213 /* Mark dynamically referenced symbols. */
12214 if (elf_hash_table (info
)->dynamic_sections_created
)
12215 elf_link_hash_traverse (elf_hash_table (info
),
12216 bed
->gc_mark_dynamic_ref
,
12219 /* Grovel through relocs to find out who stays ... */
12220 gc_mark_hook
= bed
->gc_mark_hook
;
12221 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12225 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
12228 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
12229 Also treat note sections as a root, if the section is not part
12231 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12233 && (o
->flags
& SEC_EXCLUDE
) == 0
12234 && ((o
->flags
& SEC_KEEP
) != 0
12235 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
12236 && elf_next_in_group (o
) == NULL
)))
12238 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
12243 /* Allow the backend to mark additional target specific sections. */
12244 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
12246 /* ... and mark SEC_EXCLUDE for those that go. */
12247 return elf_gc_sweep (abfd
, info
);
12250 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
12253 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
12255 struct elf_link_hash_entry
*h
,
12258 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
12259 struct elf_link_hash_entry
**search
, *child
;
12260 bfd_size_type extsymcount
;
12261 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12263 /* The sh_info field of the symtab header tells us where the
12264 external symbols start. We don't care about the local symbols at
12266 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
12267 if (!elf_bad_symtab (abfd
))
12268 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
12270 sym_hashes
= elf_sym_hashes (abfd
);
12271 sym_hashes_end
= sym_hashes
+ extsymcount
;
12273 /* Hunt down the child symbol, which is in this section at the same
12274 offset as the relocation. */
12275 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
12277 if ((child
= *search
) != NULL
12278 && (child
->root
.type
== bfd_link_hash_defined
12279 || child
->root
.type
== bfd_link_hash_defweak
)
12280 && child
->root
.u
.def
.section
== sec
12281 && child
->root
.u
.def
.value
== offset
)
12285 (*_bfd_error_handler
) ("%B: %A+%lu: No symbol found for INHERIT",
12286 abfd
, sec
, (unsigned long) offset
);
12287 bfd_set_error (bfd_error_invalid_operation
);
12291 if (!child
->vtable
)
12293 child
->vtable
= (struct elf_link_virtual_table_entry
*)
12294 bfd_zalloc (abfd
, sizeof (*child
->vtable
));
12295 if (!child
->vtable
)
12300 /* This *should* only be the absolute section. It could potentially
12301 be that someone has defined a non-global vtable though, which
12302 would be bad. It isn't worth paging in the local symbols to be
12303 sure though; that case should simply be handled by the assembler. */
12305 child
->vtable
->parent
= (struct elf_link_hash_entry
*) -1;
12308 child
->vtable
->parent
= h
;
12313 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
12316 bfd_elf_gc_record_vtentry (bfd
*abfd ATTRIBUTE_UNUSED
,
12317 asection
*sec ATTRIBUTE_UNUSED
,
12318 struct elf_link_hash_entry
*h
,
12321 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12322 unsigned int log_file_align
= bed
->s
->log_file_align
;
12326 h
->vtable
= (struct elf_link_virtual_table_entry
*)
12327 bfd_zalloc (abfd
, sizeof (*h
->vtable
));
12332 if (addend
>= h
->vtable
->size
)
12334 size_t size
, bytes
, file_align
;
12335 bfd_boolean
*ptr
= h
->vtable
->used
;
12337 /* While the symbol is undefined, we have to be prepared to handle
12339 file_align
= 1 << log_file_align
;
12340 if (h
->root
.type
== bfd_link_hash_undefined
)
12341 size
= addend
+ file_align
;
12345 if (addend
>= size
)
12347 /* Oops! We've got a reference past the defined end of
12348 the table. This is probably a bug -- shall we warn? */
12349 size
= addend
+ file_align
;
12352 size
= (size
+ file_align
- 1) & -file_align
;
12354 /* Allocate one extra entry for use as a "done" flag for the
12355 consolidation pass. */
12356 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
12360 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
12366 oldbytes
= (((h
->vtable
->size
>> log_file_align
) + 1)
12367 * sizeof (bfd_boolean
));
12368 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
12372 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
12377 /* And arrange for that done flag to be at index -1. */
12378 h
->vtable
->used
= ptr
+ 1;
12379 h
->vtable
->size
= size
;
12382 h
->vtable
->used
[addend
>> log_file_align
] = TRUE
;
12387 /* Map an ELF section header flag to its corresponding string. */
12391 flagword flag_value
;
12392 } elf_flags_to_name_table
;
12394 static elf_flags_to_name_table elf_flags_to_names
[] =
12396 { "SHF_WRITE", SHF_WRITE
},
12397 { "SHF_ALLOC", SHF_ALLOC
},
12398 { "SHF_EXECINSTR", SHF_EXECINSTR
},
12399 { "SHF_MERGE", SHF_MERGE
},
12400 { "SHF_STRINGS", SHF_STRINGS
},
12401 { "SHF_INFO_LINK", SHF_INFO_LINK
},
12402 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
12403 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
12404 { "SHF_GROUP", SHF_GROUP
},
12405 { "SHF_TLS", SHF_TLS
},
12406 { "SHF_MASKOS", SHF_MASKOS
},
12407 { "SHF_EXCLUDE", SHF_EXCLUDE
},
12410 /* Returns TRUE if the section is to be included, otherwise FALSE. */
12412 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
12413 struct flag_info
*flaginfo
,
12416 const bfd_vma sh_flags
= elf_section_flags (section
);
12418 if (!flaginfo
->flags_initialized
)
12420 bfd
*obfd
= info
->output_bfd
;
12421 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12422 struct flag_info_list
*tf
= flaginfo
->flag_list
;
12424 int without_hex
= 0;
12426 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
12429 flagword (*lookup
) (char *);
12431 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
12432 if (lookup
!= NULL
)
12434 flagword hexval
= (*lookup
) ((char *) tf
->name
);
12438 if (tf
->with
== with_flags
)
12439 with_hex
|= hexval
;
12440 else if (tf
->with
== without_flags
)
12441 without_hex
|= hexval
;
12446 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
12448 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
12450 if (tf
->with
== with_flags
)
12451 with_hex
|= elf_flags_to_names
[i
].flag_value
;
12452 else if (tf
->with
== without_flags
)
12453 without_hex
|= elf_flags_to_names
[i
].flag_value
;
12460 info
->callbacks
->einfo
12461 (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
12465 flaginfo
->flags_initialized
= TRUE
;
12466 flaginfo
->only_with_flags
|= with_hex
;
12467 flaginfo
->not_with_flags
|= without_hex
;
12470 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
12473 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
12479 struct alloc_got_off_arg
{
12481 struct bfd_link_info
*info
;
12484 /* We need a special top-level link routine to convert got reference counts
12485 to real got offsets. */
12488 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
12490 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
12491 bfd
*obfd
= gofarg
->info
->output_bfd
;
12492 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12494 if (h
->got
.refcount
> 0)
12496 h
->got
.offset
= gofarg
->gotoff
;
12497 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
12500 h
->got
.offset
= (bfd_vma
) -1;
12505 /* And an accompanying bit to work out final got entry offsets once
12506 we're done. Should be called from final_link. */
12509 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
12510 struct bfd_link_info
*info
)
12513 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12515 struct alloc_got_off_arg gofarg
;
12517 BFD_ASSERT (abfd
== info
->output_bfd
);
12519 if (! is_elf_hash_table (info
->hash
))
12522 /* The GOT offset is relative to the .got section, but the GOT header is
12523 put into the .got.plt section, if the backend uses it. */
12524 if (bed
->want_got_plt
)
12527 gotoff
= bed
->got_header_size
;
12529 /* Do the local .got entries first. */
12530 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
12532 bfd_signed_vma
*local_got
;
12533 bfd_size_type j
, locsymcount
;
12534 Elf_Internal_Shdr
*symtab_hdr
;
12536 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
12539 local_got
= elf_local_got_refcounts (i
);
12543 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
12544 if (elf_bad_symtab (i
))
12545 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
12547 locsymcount
= symtab_hdr
->sh_info
;
12549 for (j
= 0; j
< locsymcount
; ++j
)
12551 if (local_got
[j
] > 0)
12553 local_got
[j
] = gotoff
;
12554 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
12557 local_got
[j
] = (bfd_vma
) -1;
12561 /* Then the global .got entries. .plt refcounts are handled by
12562 adjust_dynamic_symbol */
12563 gofarg
.gotoff
= gotoff
;
12564 gofarg
.info
= info
;
12565 elf_link_hash_traverse (elf_hash_table (info
),
12566 elf_gc_allocate_got_offsets
,
12571 /* Many folk need no more in the way of final link than this, once
12572 got entry reference counting is enabled. */
12575 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
12577 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
12580 /* Invoke the regular ELF backend linker to do all the work. */
12581 return bfd_elf_final_link (abfd
, info
);
12585 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
12587 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
12589 if (rcookie
->bad_symtab
)
12590 rcookie
->rel
= rcookie
->rels
;
12592 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
12594 unsigned long r_symndx
;
12596 if (! rcookie
->bad_symtab
)
12597 if (rcookie
->rel
->r_offset
> offset
)
12599 if (rcookie
->rel
->r_offset
!= offset
)
12602 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
12603 if (r_symndx
== STN_UNDEF
)
12606 if (r_symndx
>= rcookie
->locsymcount
12607 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
12609 struct elf_link_hash_entry
*h
;
12611 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
12613 while (h
->root
.type
== bfd_link_hash_indirect
12614 || h
->root
.type
== bfd_link_hash_warning
)
12615 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12617 if ((h
->root
.type
== bfd_link_hash_defined
12618 || h
->root
.type
== bfd_link_hash_defweak
)
12619 && discarded_section (h
->root
.u
.def
.section
))
12626 /* It's not a relocation against a global symbol,
12627 but it could be a relocation against a local
12628 symbol for a discarded section. */
12630 Elf_Internal_Sym
*isym
;
12632 /* Need to: get the symbol; get the section. */
12633 isym
= &rcookie
->locsyms
[r_symndx
];
12634 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
12635 if (isec
!= NULL
&& discarded_section (isec
))
12643 /* Discard unneeded references to discarded sections.
12644 Returns TRUE if any section's size was changed. */
12645 /* This function assumes that the relocations are in sorted order,
12646 which is true for all known assemblers. */
12649 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
12651 struct elf_reloc_cookie cookie
;
12652 asection
*stab
, *eh
;
12653 const struct elf_backend_data
*bed
;
12655 bfd_boolean ret
= FALSE
;
12657 if (info
->traditional_format
12658 || !is_elf_hash_table (info
->hash
))
12661 _bfd_elf_begin_eh_frame_parsing (info
);
12662 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link_next
)
12664 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
12667 bed
= get_elf_backend_data (abfd
);
12670 if (!info
->relocatable
)
12672 eh
= bfd_get_section_by_name (abfd
, ".eh_frame");
12675 || bfd_is_abs_section (eh
->output_section
)))
12676 eh
= bfd_get_next_section_by_name (eh
);
12679 stab
= bfd_get_section_by_name (abfd
, ".stab");
12681 && (stab
->size
== 0
12682 || bfd_is_abs_section (stab
->output_section
)
12683 || stab
->sec_info_type
!= SEC_INFO_TYPE_STABS
))
12688 && bed
->elf_backend_discard_info
== NULL
)
12691 if (!init_reloc_cookie (&cookie
, info
, abfd
))
12695 && stab
->reloc_count
> 0
12696 && init_reloc_cookie_rels (&cookie
, info
, abfd
, stab
))
12698 if (_bfd_discard_section_stabs (abfd
, stab
,
12699 elf_section_data (stab
)->sec_info
,
12700 bfd_elf_reloc_symbol_deleted_p
,
12703 fini_reloc_cookie_rels (&cookie
, stab
);
12707 && init_reloc_cookie_rels (&cookie
, info
, abfd
, eh
))
12709 _bfd_elf_parse_eh_frame (abfd
, info
, eh
, &cookie
);
12710 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, eh
,
12711 bfd_elf_reloc_symbol_deleted_p
,
12714 fini_reloc_cookie_rels (&cookie
, eh
);
12715 eh
= bfd_get_next_section_by_name (eh
);
12718 if (bed
->elf_backend_discard_info
!= NULL
12719 && (*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
12722 fini_reloc_cookie (&cookie
, abfd
);
12724 _bfd_elf_end_eh_frame_parsing (info
);
12726 if (info
->eh_frame_hdr
12727 && !info
->relocatable
12728 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
12735 _bfd_elf_section_already_linked (bfd
*abfd
,
12737 struct bfd_link_info
*info
)
12740 const char *name
, *key
;
12741 struct bfd_section_already_linked
*l
;
12742 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
12744 if (sec
->output_section
== bfd_abs_section_ptr
)
12747 flags
= sec
->flags
;
12749 /* Return if it isn't a linkonce section. A comdat group section
12750 also has SEC_LINK_ONCE set. */
12751 if ((flags
& SEC_LINK_ONCE
) == 0)
12754 /* Don't put group member sections on our list of already linked
12755 sections. They are handled as a group via their group section. */
12756 if (elf_sec_group (sec
) != NULL
)
12759 /* For a SHT_GROUP section, use the group signature as the key. */
12761 if ((flags
& SEC_GROUP
) != 0
12762 && elf_next_in_group (sec
) != NULL
12763 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
12764 key
= elf_group_name (elf_next_in_group (sec
));
12767 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
12768 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
12769 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
12772 /* Must be a user linkonce section that doesn't follow gcc's
12773 naming convention. In this case we won't be matching
12774 single member groups. */
12778 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
12780 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12782 /* We may have 2 different types of sections on the list: group
12783 sections with a signature of <key> (<key> is some string),
12784 and linkonce sections named .gnu.linkonce.<type>.<key>.
12785 Match like sections. LTO plugin sections are an exception.
12786 They are always named .gnu.linkonce.t.<key> and match either
12787 type of section. */
12788 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
12789 && ((flags
& SEC_GROUP
) != 0
12790 || strcmp (name
, l
->sec
->name
) == 0))
12791 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0)
12793 /* The section has already been linked. See if we should
12794 issue a warning. */
12795 if (!_bfd_handle_already_linked (sec
, l
, info
))
12798 if (flags
& SEC_GROUP
)
12800 asection
*first
= elf_next_in_group (sec
);
12801 asection
*s
= first
;
12805 s
->output_section
= bfd_abs_section_ptr
;
12806 /* Record which group discards it. */
12807 s
->kept_section
= l
->sec
;
12808 s
= elf_next_in_group (s
);
12809 /* These lists are circular. */
12819 /* A single member comdat group section may be discarded by a
12820 linkonce section and vice versa. */
12821 if ((flags
& SEC_GROUP
) != 0)
12823 asection
*first
= elf_next_in_group (sec
);
12825 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
12826 /* Check this single member group against linkonce sections. */
12827 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12828 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12829 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
12831 first
->output_section
= bfd_abs_section_ptr
;
12832 first
->kept_section
= l
->sec
;
12833 sec
->output_section
= bfd_abs_section_ptr
;
12838 /* Check this linkonce section against single member groups. */
12839 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12840 if (l
->sec
->flags
& SEC_GROUP
)
12842 asection
*first
= elf_next_in_group (l
->sec
);
12845 && elf_next_in_group (first
) == first
12846 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
12848 sec
->output_section
= bfd_abs_section_ptr
;
12849 sec
->kept_section
= first
;
12854 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
12855 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
12856 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
12857 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
12858 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
12859 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
12860 `.gnu.linkonce.t.F' section from a different bfd not requiring any
12861 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
12862 The reverse order cannot happen as there is never a bfd with only the
12863 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
12864 matter as here were are looking only for cross-bfd sections. */
12866 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
12867 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12868 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12869 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
12871 if (abfd
!= l
->sec
->owner
)
12872 sec
->output_section
= bfd_abs_section_ptr
;
12876 /* This is the first section with this name. Record it. */
12877 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
12878 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
12879 return sec
->output_section
== bfd_abs_section_ptr
;
12883 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
12885 return sym
->st_shndx
== SHN_COMMON
;
12889 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
12895 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
12897 return bfd_com_section_ptr
;
12901 _bfd_elf_default_got_elt_size (bfd
*abfd
,
12902 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12903 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
12904 bfd
*ibfd ATTRIBUTE_UNUSED
,
12905 unsigned long symndx ATTRIBUTE_UNUSED
)
12907 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12908 return bed
->s
->arch_size
/ 8;
12911 /* Routines to support the creation of dynamic relocs. */
12913 /* Returns the name of the dynamic reloc section associated with SEC. */
12915 static const char *
12916 get_dynamic_reloc_section_name (bfd
* abfd
,
12918 bfd_boolean is_rela
)
12921 const char *old_name
= bfd_get_section_name (NULL
, sec
);
12922 const char *prefix
= is_rela
? ".rela" : ".rel";
12924 if (old_name
== NULL
)
12927 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
12928 sprintf (name
, "%s%s", prefix
, old_name
);
12933 /* Returns the dynamic reloc section associated with SEC.
12934 If necessary compute the name of the dynamic reloc section based
12935 on SEC's name (looked up in ABFD's string table) and the setting
12939 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
12941 bfd_boolean is_rela
)
12943 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12945 if (reloc_sec
== NULL
)
12947 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12951 reloc_sec
= bfd_get_linker_section (abfd
, name
);
12953 if (reloc_sec
!= NULL
)
12954 elf_section_data (sec
)->sreloc
= reloc_sec
;
12961 /* Returns the dynamic reloc section associated with SEC. If the
12962 section does not exist it is created and attached to the DYNOBJ
12963 bfd and stored in the SRELOC field of SEC's elf_section_data
12966 ALIGNMENT is the alignment for the newly created section and
12967 IS_RELA defines whether the name should be .rela.<SEC's name>
12968 or .rel.<SEC's name>. The section name is looked up in the
12969 string table associated with ABFD. */
12972 _bfd_elf_make_dynamic_reloc_section (asection
* sec
,
12974 unsigned int alignment
,
12976 bfd_boolean is_rela
)
12978 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12980 if (reloc_sec
== NULL
)
12982 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12987 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
12989 if (reloc_sec
== NULL
)
12991 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
12992 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
12993 if ((sec
->flags
& SEC_ALLOC
) != 0)
12994 flags
|= SEC_ALLOC
| SEC_LOAD
;
12996 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
12997 if (reloc_sec
!= NULL
)
12999 /* _bfd_elf_get_sec_type_attr chooses a section type by
13000 name. Override as it may be wrong, eg. for a user
13001 section named "auto" we'll get ".relauto" which is
13002 seen to be a .rela section. */
13003 elf_section_type (reloc_sec
) = is_rela
? SHT_RELA
: SHT_REL
;
13004 if (! bfd_set_section_alignment (dynobj
, reloc_sec
, alignment
))
13009 elf_section_data (sec
)->sreloc
= reloc_sec
;
13015 /* Copy the ELF symbol type associated with a linker hash entry. */
13017 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd ATTRIBUTE_UNUSED
,
13018 struct bfd_link_hash_entry
* hdest
,
13019 struct bfd_link_hash_entry
* hsrc
)
13021 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*)hdest
;
13022 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*)hsrc
;
13024 ehdest
->type
= ehsrc
->type
;
13025 ehdest
->target_internal
= ehsrc
->target_internal
;
13028 /* Append a RELA relocation REL to section S in BFD. */
13031 elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13033 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13034 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
13035 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
13036 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
13039 /* Append a REL relocation REL to section S in BFD. */
13042 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13044 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13045 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
13046 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
13047 bed
->s
->swap_reloc_out (abfd
, rel
, loc
);