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 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
89 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
91 bed
= get_elf_backend_data (abfd
);
92 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
97 _bfd_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
101 struct elf_link_hash_entry
*h
;
102 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
103 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
105 /* This function may be called more than once. */
106 s
= bfd_get_linker_section (abfd
, ".got");
110 flags
= bed
->dynamic_sec_flags
;
112 s
= bfd_make_section_anyway_with_flags (abfd
,
113 (bed
->rela_plts_and_copies_p
114 ? ".rela.got" : ".rel.got"),
115 (bed
->dynamic_sec_flags
118 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
122 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
124 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
128 if (bed
->want_got_plt
)
130 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
132 || !bfd_set_section_alignment (abfd
, s
,
133 bed
->s
->log_file_align
))
138 /* The first bit of the global offset table is the header. */
139 s
->size
+= bed
->got_header_size
;
141 if (bed
->want_got_sym
)
143 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
144 (or .got.plt) section. We don't do this in the linker script
145 because we don't want to define the symbol if we are not creating
146 a global offset table. */
147 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
148 "_GLOBAL_OFFSET_TABLE_");
149 elf_hash_table (info
)->hgot
= h
;
157 /* Create a strtab to hold the dynamic symbol names. */
159 _bfd_elf_link_create_dynstrtab (bfd
*abfd
, struct bfd_link_info
*info
)
161 struct elf_link_hash_table
*hash_table
;
163 hash_table
= elf_hash_table (info
);
164 if (hash_table
->dynobj
== NULL
)
165 hash_table
->dynobj
= abfd
;
167 if (hash_table
->dynstr
== NULL
)
169 hash_table
->dynstr
= _bfd_elf_strtab_init ();
170 if (hash_table
->dynstr
== NULL
)
176 /* Create some sections which will be filled in with dynamic linking
177 information. ABFD is an input file which requires dynamic sections
178 to be created. The dynamic sections take up virtual memory space
179 when the final executable is run, so we need to create them before
180 addresses are assigned to the output sections. We work out the
181 actual contents and size of these sections later. */
184 _bfd_elf_link_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
188 const struct elf_backend_data
*bed
;
189 struct elf_link_hash_entry
*h
;
191 if (! is_elf_hash_table (info
->hash
))
194 if (elf_hash_table (info
)->dynamic_sections_created
)
197 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
200 abfd
= elf_hash_table (info
)->dynobj
;
201 bed
= get_elf_backend_data (abfd
);
203 flags
= bed
->dynamic_sec_flags
;
205 /* A dynamically linked executable has a .interp section, but a
206 shared library does not. */
207 if (info
->executable
)
209 s
= bfd_make_section_anyway_with_flags (abfd
, ".interp",
210 flags
| SEC_READONLY
);
215 /* Create sections to hold version informations. These are removed
216 if they are not needed. */
217 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_d",
218 flags
| SEC_READONLY
);
220 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
223 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version",
224 flags
| SEC_READONLY
);
226 || ! bfd_set_section_alignment (abfd
, s
, 1))
229 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_r",
230 flags
| SEC_READONLY
);
232 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
235 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynsym",
236 flags
| SEC_READONLY
);
238 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
241 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynstr",
242 flags
| SEC_READONLY
);
246 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynamic", flags
);
248 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
251 /* The special symbol _DYNAMIC is always set to the start of the
252 .dynamic section. We could set _DYNAMIC in a linker script, but we
253 only want to define it if we are, in fact, creating a .dynamic
254 section. We don't want to define it if there is no .dynamic
255 section, since on some ELF platforms the start up code examines it
256 to decide how to initialize the process. */
257 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "_DYNAMIC");
258 elf_hash_table (info
)->hdynamic
= h
;
264 s
= bfd_make_section_anyway_with_flags (abfd
, ".hash",
265 flags
| SEC_READONLY
);
267 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
269 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
272 if (info
->emit_gnu_hash
)
274 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.hash",
275 flags
| SEC_READONLY
);
277 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
279 /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section:
280 4 32-bit words followed by variable count of 64-bit words, then
281 variable count of 32-bit words. */
282 if (bed
->s
->arch_size
== 64)
283 elf_section_data (s
)->this_hdr
.sh_entsize
= 0;
285 elf_section_data (s
)->this_hdr
.sh_entsize
= 4;
288 /* Let the backend create the rest of the sections. This lets the
289 backend set the right flags. The backend will normally create
290 the .got and .plt sections. */
291 if (bed
->elf_backend_create_dynamic_sections
== NULL
292 || ! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
295 elf_hash_table (info
)->dynamic_sections_created
= TRUE
;
300 /* Create dynamic sections when linking against a dynamic object. */
303 _bfd_elf_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
305 flagword flags
, pltflags
;
306 struct elf_link_hash_entry
*h
;
308 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
309 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
311 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
312 .rel[a].bss sections. */
313 flags
= bed
->dynamic_sec_flags
;
316 if (bed
->plt_not_loaded
)
317 /* We do not clear SEC_ALLOC here because we still want the OS to
318 allocate space for the section; it's just that there's nothing
319 to read in from the object file. */
320 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
322 pltflags
|= SEC_ALLOC
| SEC_CODE
| SEC_LOAD
;
323 if (bed
->plt_readonly
)
324 pltflags
|= SEC_READONLY
;
326 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
328 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
332 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
334 if (bed
->want_plt_sym
)
336 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
337 "_PROCEDURE_LINKAGE_TABLE_");
338 elf_hash_table (info
)->hplt
= h
;
343 s
= bfd_make_section_anyway_with_flags (abfd
,
344 (bed
->rela_plts_and_copies_p
345 ? ".rela.plt" : ".rel.plt"),
346 flags
| SEC_READONLY
);
348 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
352 if (! _bfd_elf_create_got_section (abfd
, info
))
355 if (bed
->want_dynbss
)
357 /* The .dynbss section is a place to put symbols which are defined
358 by dynamic objects, are referenced by regular objects, and are
359 not functions. We must allocate space for them in the process
360 image and use a R_*_COPY reloc to tell the dynamic linker to
361 initialize them at run time. The linker script puts the .dynbss
362 section into the .bss section of the final image. */
363 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
364 (SEC_ALLOC
| SEC_LINKER_CREATED
));
368 /* The .rel[a].bss section holds copy relocs. This section is not
369 normally needed. We need to create it here, though, so that the
370 linker will map it to an output section. We can't just create it
371 only if we need it, because we will not know whether we need it
372 until we have seen all the input files, and the first time the
373 main linker code calls BFD after examining all the input files
374 (size_dynamic_sections) the input sections have already been
375 mapped to the output sections. If the section turns out not to
376 be needed, we can discard it later. We will never need this
377 section when generating a shared object, since they do not use
381 s
= bfd_make_section_anyway_with_flags (abfd
,
382 (bed
->rela_plts_and_copies_p
383 ? ".rela.bss" : ".rel.bss"),
384 flags
| SEC_READONLY
);
386 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
394 /* Record a new dynamic symbol. We record the dynamic symbols as we
395 read the input files, since we need to have a list of all of them
396 before we can determine the final sizes of the output sections.
397 Note that we may actually call this function even though we are not
398 going to output any dynamic symbols; in some cases we know that a
399 symbol should be in the dynamic symbol table, but only if there is
403 bfd_elf_link_record_dynamic_symbol (struct bfd_link_info
*info
,
404 struct elf_link_hash_entry
*h
)
406 if (h
->dynindx
== -1)
408 struct elf_strtab_hash
*dynstr
;
413 /* XXX: The ABI draft says the linker must turn hidden and
414 internal symbols into STB_LOCAL symbols when producing the
415 DSO. However, if ld.so honors st_other in the dynamic table,
416 this would not be necessary. */
417 switch (ELF_ST_VISIBILITY (h
->other
))
421 if (h
->root
.type
!= bfd_link_hash_undefined
422 && h
->root
.type
!= bfd_link_hash_undefweak
)
425 if (!elf_hash_table (info
)->is_relocatable_executable
)
433 h
->dynindx
= elf_hash_table (info
)->dynsymcount
;
434 ++elf_hash_table (info
)->dynsymcount
;
436 dynstr
= elf_hash_table (info
)->dynstr
;
439 /* Create a strtab to hold the dynamic symbol names. */
440 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
445 /* We don't put any version information in the dynamic string
447 name
= h
->root
.root
.string
;
448 p
= strchr (name
, ELF_VER_CHR
);
450 /* We know that the p points into writable memory. In fact,
451 there are only a few symbols that have read-only names, being
452 those like _GLOBAL_OFFSET_TABLE_ that are created specially
453 by the backends. Most symbols will have names pointing into
454 an ELF string table read from a file, or to objalloc memory. */
457 indx
= _bfd_elf_strtab_add (dynstr
, name
, p
!= NULL
);
462 if (indx
== (bfd_size_type
) -1)
464 h
->dynstr_index
= indx
;
470 /* Mark a symbol dynamic. */
473 bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info
*info
,
474 struct elf_link_hash_entry
*h
,
475 Elf_Internal_Sym
*sym
)
477 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
479 /* It may be called more than once on the same H. */
480 if(h
->dynamic
|| info
->relocatable
)
483 if ((info
->dynamic_data
484 && (h
->type
== STT_OBJECT
486 && ELF_ST_TYPE (sym
->st_info
) == STT_OBJECT
)))
488 && h
->root
.type
== bfd_link_hash_new
489 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
493 /* Record an assignment to a symbol made by a linker script. We need
494 this in case some dynamic object refers to this symbol. */
497 bfd_elf_record_link_assignment (bfd
*output_bfd
,
498 struct bfd_link_info
*info
,
503 struct elf_link_hash_entry
*h
, *hv
;
504 struct elf_link_hash_table
*htab
;
505 const struct elf_backend_data
*bed
;
507 if (!is_elf_hash_table (info
->hash
))
510 htab
= elf_hash_table (info
);
511 h
= elf_link_hash_lookup (htab
, name
, !provide
, TRUE
, FALSE
);
515 switch (h
->root
.type
)
517 case bfd_link_hash_defined
:
518 case bfd_link_hash_defweak
:
519 case bfd_link_hash_common
:
521 case bfd_link_hash_undefweak
:
522 case bfd_link_hash_undefined
:
523 /* Since we're defining the symbol, don't let it seem to have not
524 been defined. record_dynamic_symbol and size_dynamic_sections
525 may depend on this. */
526 h
->root
.type
= bfd_link_hash_new
;
527 if (h
->root
.u
.undef
.next
!= NULL
|| htab
->root
.undefs_tail
== &h
->root
)
528 bfd_link_repair_undef_list (&htab
->root
);
530 case bfd_link_hash_new
:
531 bfd_elf_link_mark_dynamic_symbol (info
, h
, NULL
);
534 case bfd_link_hash_indirect
:
535 /* We had a versioned symbol in a dynamic library. We make the
536 the versioned symbol point to this one. */
537 bed
= get_elf_backend_data (output_bfd
);
539 while (hv
->root
.type
== bfd_link_hash_indirect
540 || hv
->root
.type
== bfd_link_hash_warning
)
541 hv
= (struct elf_link_hash_entry
*) hv
->root
.u
.i
.link
;
542 /* We don't need to update h->root.u since linker will set them
544 h
->root
.type
= bfd_link_hash_undefined
;
545 hv
->root
.type
= bfd_link_hash_indirect
;
546 hv
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
547 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hv
);
549 case bfd_link_hash_warning
:
554 /* If this symbol is being provided by the linker script, and it is
555 currently defined by a dynamic object, but not by a regular
556 object, then mark it as undefined so that the generic linker will
557 force the correct value. */
561 h
->root
.type
= bfd_link_hash_undefined
;
563 /* If this symbol is not being provided by the linker script, and it is
564 currently defined by a dynamic object, but not by a regular object,
565 then clear out any version information because the symbol will not be
566 associated with the dynamic object any more. */
570 h
->verinfo
.verdef
= NULL
;
576 bed
= get_elf_backend_data (output_bfd
);
577 if (ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
)
578 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
579 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
582 /* STV_HIDDEN and STV_INTERNAL symbols must be STB_LOCAL in shared objects
584 if (!info
->relocatable
586 && (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
587 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
))
593 || (info
->executable
&& elf_hash_table (info
)->is_relocatable_executable
))
596 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
599 /* If this is a weak defined symbol, and we know a corresponding
600 real symbol from the same dynamic object, make sure the real
601 symbol is also made into a dynamic symbol. */
602 if (h
->u
.weakdef
!= NULL
603 && h
->u
.weakdef
->dynindx
== -1)
605 if (! bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
613 /* Record a new local dynamic symbol. Returns 0 on failure, 1 on
614 success, and 2 on a failure caused by attempting to record a symbol
615 in a discarded section, eg. a discarded link-once section symbol. */
618 bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info
*info
,
623 struct elf_link_local_dynamic_entry
*entry
;
624 struct elf_link_hash_table
*eht
;
625 struct elf_strtab_hash
*dynstr
;
626 unsigned long dynstr_index
;
628 Elf_External_Sym_Shndx eshndx
;
629 char esym
[sizeof (Elf64_External_Sym
)];
631 if (! is_elf_hash_table (info
->hash
))
634 /* See if the entry exists already. */
635 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
636 if (entry
->input_bfd
== input_bfd
&& entry
->input_indx
== input_indx
)
639 amt
= sizeof (*entry
);
640 entry
= (struct elf_link_local_dynamic_entry
*) bfd_alloc (input_bfd
, amt
);
644 /* Go find the symbol, so that we can find it's name. */
645 if (!bfd_elf_get_elf_syms (input_bfd
, &elf_tdata (input_bfd
)->symtab_hdr
,
646 1, input_indx
, &entry
->isym
, esym
, &eshndx
))
648 bfd_release (input_bfd
, entry
);
652 if (entry
->isym
.st_shndx
!= SHN_UNDEF
653 && entry
->isym
.st_shndx
< SHN_LORESERVE
)
657 s
= bfd_section_from_elf_index (input_bfd
, entry
->isym
.st_shndx
);
658 if (s
== NULL
|| bfd_is_abs_section (s
->output_section
))
660 /* We can still bfd_release here as nothing has done another
661 bfd_alloc. We can't do this later in this function. */
662 bfd_release (input_bfd
, entry
);
667 name
= (bfd_elf_string_from_elf_section
668 (input_bfd
, elf_tdata (input_bfd
)->symtab_hdr
.sh_link
,
669 entry
->isym
.st_name
));
671 dynstr
= elf_hash_table (info
)->dynstr
;
674 /* Create a strtab to hold the dynamic symbol names. */
675 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
680 dynstr_index
= _bfd_elf_strtab_add (dynstr
, name
, FALSE
);
681 if (dynstr_index
== (unsigned long) -1)
683 entry
->isym
.st_name
= dynstr_index
;
685 eht
= elf_hash_table (info
);
687 entry
->next
= eht
->dynlocal
;
688 eht
->dynlocal
= entry
;
689 entry
->input_bfd
= input_bfd
;
690 entry
->input_indx
= input_indx
;
693 /* Whatever binding the symbol had before, it's now local. */
695 = ELF_ST_INFO (STB_LOCAL
, ELF_ST_TYPE (entry
->isym
.st_info
));
697 /* The dynindx will be set at the end of size_dynamic_sections. */
702 /* Return the dynindex of a local dynamic symbol. */
705 _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info
*info
,
709 struct elf_link_local_dynamic_entry
*e
;
711 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
712 if (e
->input_bfd
== input_bfd
&& e
->input_indx
== input_indx
)
717 /* This function is used to renumber the dynamic symbols, if some of
718 them are removed because they are marked as local. This is called
719 via elf_link_hash_traverse. */
722 elf_link_renumber_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
725 size_t *count
= (size_t *) data
;
730 if (h
->dynindx
!= -1)
731 h
->dynindx
= ++(*count
);
737 /* Like elf_link_renumber_hash_table_dynsyms, but just number symbols with
738 STB_LOCAL binding. */
741 elf_link_renumber_local_hash_table_dynsyms (struct elf_link_hash_entry
*h
,
744 size_t *count
= (size_t *) data
;
746 if (!h
->forced_local
)
749 if (h
->dynindx
!= -1)
750 h
->dynindx
= ++(*count
);
755 /* Return true if the dynamic symbol for a given section should be
756 omitted when creating a shared library. */
758 _bfd_elf_link_omit_section_dynsym (bfd
*output_bfd ATTRIBUTE_UNUSED
,
759 struct bfd_link_info
*info
,
762 struct elf_link_hash_table
*htab
;
764 switch (elf_section_data (p
)->this_hdr
.sh_type
)
768 /* If sh_type is yet undecided, assume it could be
769 SHT_PROGBITS/SHT_NOBITS. */
771 htab
= elf_hash_table (info
);
772 if (p
== htab
->tls_sec
)
775 if (htab
->text_index_section
!= NULL
)
776 return p
!= htab
->text_index_section
&& p
!= htab
->data_index_section
;
778 if (strcmp (p
->name
, ".got") == 0
779 || strcmp (p
->name
, ".got.plt") == 0
780 || strcmp (p
->name
, ".plt") == 0)
784 if (htab
->dynobj
!= NULL
785 && (ip
= bfd_get_linker_section (htab
->dynobj
, p
->name
)) != NULL
786 && ip
->output_section
== p
)
791 /* There shouldn't be section relative relocations
792 against any other section. */
798 /* Assign dynsym indices. In a shared library we generate a section
799 symbol for each output section, which come first. Next come symbols
800 which have been forced to local binding. Then all of the back-end
801 allocated local dynamic syms, followed by the rest of the global
805 _bfd_elf_link_renumber_dynsyms (bfd
*output_bfd
,
806 struct bfd_link_info
*info
,
807 unsigned long *section_sym_count
)
809 unsigned long dynsymcount
= 0;
811 if (info
->shared
|| elf_hash_table (info
)->is_relocatable_executable
)
813 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
815 for (p
= output_bfd
->sections
; p
; p
= p
->next
)
816 if ((p
->flags
& SEC_EXCLUDE
) == 0
817 && (p
->flags
& SEC_ALLOC
) != 0
818 && !(*bed
->elf_backend_omit_section_dynsym
) (output_bfd
, info
, p
))
819 elf_section_data (p
)->dynindx
= ++dynsymcount
;
821 elf_section_data (p
)->dynindx
= 0;
823 *section_sym_count
= dynsymcount
;
825 elf_link_hash_traverse (elf_hash_table (info
),
826 elf_link_renumber_local_hash_table_dynsyms
,
829 if (elf_hash_table (info
)->dynlocal
)
831 struct elf_link_local_dynamic_entry
*p
;
832 for (p
= elf_hash_table (info
)->dynlocal
; p
; p
= p
->next
)
833 p
->dynindx
= ++dynsymcount
;
836 elf_link_hash_traverse (elf_hash_table (info
),
837 elf_link_renumber_hash_table_dynsyms
,
840 /* There is an unused NULL entry at the head of the table which
841 we must account for in our count. Unless there weren't any
842 symbols, which means we'll have no table at all. */
843 if (dynsymcount
!= 0)
846 elf_hash_table (info
)->dynsymcount
= dynsymcount
;
850 /* Merge st_other field. */
853 elf_merge_st_other (bfd
*abfd
, struct elf_link_hash_entry
*h
,
854 Elf_Internal_Sym
*isym
, bfd_boolean definition
,
857 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
859 /* If st_other has a processor-specific meaning, specific
860 code might be needed here. We never merge the visibility
861 attribute with the one from a dynamic object. */
862 if (bed
->elf_backend_merge_symbol_attribute
)
863 (*bed
->elf_backend_merge_symbol_attribute
) (h
, isym
, definition
,
866 /* If this symbol has default visibility and the user has requested
867 we not re-export it, then mark it as hidden. */
871 || (abfd
->my_archive
&& abfd
->my_archive
->no_export
))
872 && ELF_ST_VISIBILITY (isym
->st_other
) != STV_INTERNAL
)
873 isym
->st_other
= (STV_HIDDEN
874 | (isym
->st_other
& ~ELF_ST_VISIBILITY (-1)));
876 if (!dynamic
&& ELF_ST_VISIBILITY (isym
->st_other
) != 0)
878 unsigned char hvis
, symvis
, other
, nvis
;
880 /* Only merge the visibility. Leave the remainder of the
881 st_other field to elf_backend_merge_symbol_attribute. */
882 other
= h
->other
& ~ELF_ST_VISIBILITY (-1);
884 /* Combine visibilities, using the most constraining one. */
885 hvis
= ELF_ST_VISIBILITY (h
->other
);
886 symvis
= ELF_ST_VISIBILITY (isym
->st_other
);
892 nvis
= hvis
< symvis
? hvis
: symvis
;
894 h
->other
= other
| nvis
;
898 /* This function is called when we want to merge a new symbol with an
899 existing symbol. It handles the various cases which arise when we
900 find a definition in a dynamic object, or when there is already a
901 definition in a dynamic object. The new symbol is described by
902 NAME, SYM, PSEC, and PVALUE. We set SYM_HASH to the hash table
903 entry. We set POLDBFD to the old symbol's BFD. We set POLD_WEAK
904 if the old symbol was weak. We set POLD_ALIGNMENT to the alignment
905 of an old common symbol. We set OVERRIDE if the old symbol is
906 overriding a new definition. We set TYPE_CHANGE_OK if it is OK for
907 the type to change. We set SIZE_CHANGE_OK if it is OK for the size
908 to change. By OK to change, we mean that we shouldn't warn if the
909 type or size does change. */
912 _bfd_elf_merge_symbol (bfd
*abfd
,
913 struct bfd_link_info
*info
,
915 Elf_Internal_Sym
*sym
,
918 struct elf_link_hash_entry
**sym_hash
,
920 bfd_boolean
*pold_weak
,
921 unsigned int *pold_alignment
,
923 bfd_boolean
*override
,
924 bfd_boolean
*type_change_ok
,
925 bfd_boolean
*size_change_ok
)
927 asection
*sec
, *oldsec
;
928 struct elf_link_hash_entry
*h
;
929 struct elf_link_hash_entry
*hi
;
930 struct elf_link_hash_entry
*flip
;
933 bfd_boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
934 bfd_boolean newweak
, oldweak
, newfunc
, oldfunc
;
935 const struct elf_backend_data
*bed
;
941 bind
= ELF_ST_BIND (sym
->st_info
);
943 if (! bfd_is_und_section (sec
))
944 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, FALSE
, FALSE
);
946 h
= ((struct elf_link_hash_entry
*)
947 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, TRUE
, FALSE
, FALSE
));
952 bed
= get_elf_backend_data (abfd
);
954 /* For merging, we only care about real symbols. But we need to make
955 sure that indirect symbol dynamic flags are updated. */
957 while (h
->root
.type
== bfd_link_hash_indirect
958 || h
->root
.type
== bfd_link_hash_warning
)
959 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
961 /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the
966 switch (h
->root
.type
)
971 case bfd_link_hash_undefined
:
972 case bfd_link_hash_undefweak
:
973 oldbfd
= h
->root
.u
.undef
.abfd
;
976 case bfd_link_hash_defined
:
977 case bfd_link_hash_defweak
:
978 oldbfd
= h
->root
.u
.def
.section
->owner
;
979 oldsec
= h
->root
.u
.def
.section
;
982 case bfd_link_hash_common
:
983 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
984 oldsec
= h
->root
.u
.c
.p
->section
;
986 *pold_alignment
= h
->root
.u
.c
.p
->alignment_power
;
989 if (poldbfd
&& *poldbfd
== NULL
)
992 /* Differentiate strong and weak symbols. */
993 newweak
= bind
== STB_WEAK
;
994 oldweak
= (h
->root
.type
== bfd_link_hash_defweak
995 || h
->root
.type
== bfd_link_hash_undefweak
);
997 *pold_weak
= oldweak
;
999 /* This code is for coping with dynamic objects, and is only useful
1000 if we are doing an ELF link. */
1001 if (!(*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
1004 /* We have to check it for every instance since the first few may be
1005 references and not all compilers emit symbol type for undefined
1007 bfd_elf_link_mark_dynamic_symbol (info
, h
, sym
);
1009 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
1010 respectively, is from a dynamic object. */
1012 newdyn
= (abfd
->flags
& DYNAMIC
) != 0;
1014 /* ref_dynamic_nonweak and dynamic_def flags track actual undefined
1015 syms and defined syms in dynamic libraries respectively.
1016 ref_dynamic on the other hand can be set for a symbol defined in
1017 a dynamic library, and def_dynamic may not be set; When the
1018 definition in a dynamic lib is overridden by a definition in the
1019 executable use of the symbol in the dynamic lib becomes a
1020 reference to the executable symbol. */
1023 if (bfd_is_und_section (sec
))
1025 if (bind
!= STB_WEAK
)
1027 h
->ref_dynamic_nonweak
= 1;
1028 hi
->ref_dynamic_nonweak
= 1;
1034 hi
->dynamic_def
= 1;
1038 /* If we just created the symbol, mark it as being an ELF symbol.
1039 Other than that, there is nothing to do--there is no merge issue
1040 with a newly defined symbol--so we just return. */
1042 if (h
->root
.type
== bfd_link_hash_new
)
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. */
1091 if (pold_alignment
== NULL
1095 && (((olddef
|| h
->root
.type
== bfd_link_hash_common
)
1096 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1097 && ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1098 && h
->type
!= STT_NOTYPE
1099 && !(newfunc
&& oldfunc
))
1101 && ((h
->type
== STT_GNU_IFUNC
)
1102 != (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)))))
1108 /* Plugin symbol type isn't currently set. Stop bogus errors. */
1109 if (oldbfd
!= NULL
&& (oldbfd
->flags
& BFD_PLUGIN
) != 0)
1110 *type_change_ok
= TRUE
;
1112 /* Check TLS symbol. We don't check undefined symbol introduced by
1114 else if (oldbfd
!= NULL
1115 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1116 && (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
|| h
->type
== STT_TLS
))
1119 bfd_boolean ntdef
, tdef
;
1120 asection
*ntsec
, *tsec
;
1122 if (h
->type
== STT_TLS
)
1142 (*_bfd_error_handler
)
1143 (_("%s: TLS definition in %B section %A "
1144 "mismatches non-TLS definition in %B section %A"),
1145 tbfd
, tsec
, ntbfd
, ntsec
, h
->root
.root
.string
);
1146 else if (!tdef
&& !ntdef
)
1147 (*_bfd_error_handler
)
1148 (_("%s: TLS reference in %B "
1149 "mismatches non-TLS reference in %B"),
1150 tbfd
, ntbfd
, h
->root
.root
.string
);
1152 (*_bfd_error_handler
)
1153 (_("%s: TLS definition in %B section %A "
1154 "mismatches non-TLS reference in %B"),
1155 tbfd
, tsec
, ntbfd
, h
->root
.root
.string
);
1157 (*_bfd_error_handler
)
1158 (_("%s: TLS reference in %B "
1159 "mismatches non-TLS definition in %B section %A"),
1160 tbfd
, ntbfd
, ntsec
, h
->root
.root
.string
);
1162 bfd_set_error (bfd_error_bad_value
);
1166 /* If the old symbol has non-default visibility, we ignore the new
1167 definition from a dynamic object. */
1169 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1170 && !bfd_is_und_section (sec
))
1173 /* Make sure this symbol is dynamic. */
1175 hi
->ref_dynamic
= 1;
1176 /* A protected symbol has external availability. Make sure it is
1177 recorded as dynamic.
1179 FIXME: Should we check type and size for protected symbol? */
1180 if (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
1181 return bfd_elf_link_record_dynamic_symbol (info
, h
);
1186 && ELF_ST_VISIBILITY (sym
->st_other
) != STV_DEFAULT
1189 /* If the new symbol with non-default visibility comes from a
1190 relocatable file and the old definition comes from a dynamic
1191 object, we remove the old definition. */
1192 if (hi
->root
.type
== bfd_link_hash_indirect
)
1194 /* Handle the case where the old dynamic definition is
1195 default versioned. We need to copy the symbol info from
1196 the symbol with default version to the normal one if it
1197 was referenced before. */
1200 hi
->root
.type
= h
->root
.type
;
1201 h
->root
.type
= bfd_link_hash_indirect
;
1202 (*bed
->elf_backend_copy_indirect_symbol
) (info
, hi
, h
);
1204 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1205 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1207 /* If the new symbol is hidden or internal, completely undo
1208 any dynamic link state. */
1209 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1210 h
->forced_local
= 0;
1217 /* FIXME: Should we check type and size for protected symbol? */
1227 /* If the old symbol was undefined before, then it will still be
1228 on the undefs list. If the new symbol is undefined or
1229 common, we can't make it bfd_link_hash_new here, because new
1230 undefined or common symbols will be added to the undefs list
1231 by _bfd_generic_link_add_one_symbol. Symbols may not be
1232 added twice to the undefs list. Also, if the new symbol is
1233 undefweak then we don't want to lose the strong undef. */
1234 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1236 h
->root
.type
= bfd_link_hash_undefined
;
1237 h
->root
.u
.undef
.abfd
= abfd
;
1241 h
->root
.type
= bfd_link_hash_new
;
1242 h
->root
.u
.undef
.abfd
= NULL
;
1245 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1247 /* If the new symbol is hidden or internal, completely undo
1248 any dynamic link state. */
1249 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1250 h
->forced_local
= 0;
1256 /* FIXME: Should we check type and size for protected symbol? */
1262 /* If a new weak symbol definition comes from a regular file and the
1263 old symbol comes from a dynamic library, we treat the new one as
1264 strong. Similarly, an old weak symbol definition from a regular
1265 file is treated as strong when the new symbol comes from a dynamic
1266 library. Further, an old weak symbol from a dynamic library is
1267 treated as strong if the new symbol is from a dynamic library.
1268 This reflects the way glibc's ld.so works.
1270 Do this before setting *type_change_ok or *size_change_ok so that
1271 we warn properly when dynamic library symbols are overridden. */
1273 if (newdef
&& !newdyn
&& olddyn
)
1275 if (olddef
&& newdyn
)
1278 /* Allow changes between different types of function symbol. */
1279 if (newfunc
&& oldfunc
)
1280 *type_change_ok
= TRUE
;
1282 /* It's OK to change the type if either the existing symbol or the
1283 new symbol is weak. A type change is also OK if the old symbol
1284 is undefined and the new symbol is defined. */
1289 && h
->root
.type
== bfd_link_hash_undefined
))
1290 *type_change_ok
= TRUE
;
1292 /* It's OK to change the size if either the existing symbol or the
1293 new symbol is weak, or if the old symbol is undefined. */
1296 || h
->root
.type
== bfd_link_hash_undefined
)
1297 *size_change_ok
= TRUE
;
1299 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
1300 symbol, respectively, appears to be a common symbol in a dynamic
1301 object. If a symbol appears in an uninitialized section, and is
1302 not weak, and is not a function, then it may be a common symbol
1303 which was resolved when the dynamic object was created. We want
1304 to treat such symbols specially, because they raise special
1305 considerations when setting the symbol size: if the symbol
1306 appears as a common symbol in a regular object, and the size in
1307 the regular object is larger, we must make sure that we use the
1308 larger size. This problematic case can always be avoided in C,
1309 but it must be handled correctly when using Fortran shared
1312 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
1313 likewise for OLDDYNCOMMON and OLDDEF.
1315 Note that this test is just a heuristic, and that it is quite
1316 possible to have an uninitialized symbol in a shared object which
1317 is really a definition, rather than a common symbol. This could
1318 lead to some minor confusion when the symbol really is a common
1319 symbol in some regular object. However, I think it will be
1325 && (sec
->flags
& SEC_ALLOC
) != 0
1326 && (sec
->flags
& SEC_LOAD
) == 0
1329 newdyncommon
= TRUE
;
1331 newdyncommon
= FALSE
;
1335 && h
->root
.type
== bfd_link_hash_defined
1337 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
1338 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
1341 olddyncommon
= TRUE
;
1343 olddyncommon
= FALSE
;
1345 /* We now know everything about the old and new symbols. We ask the
1346 backend to check if we can merge them. */
1347 if (bed
->merge_symbol
!= NULL
)
1349 if (!bed
->merge_symbol (h
, sym
, psec
, newdef
, olddef
, oldbfd
, oldsec
))
1354 /* If both the old and the new symbols look like common symbols in a
1355 dynamic object, set the size of the symbol to the larger of the
1360 && sym
->st_size
!= h
->size
)
1362 /* Since we think we have two common symbols, issue a multiple
1363 common warning if desired. Note that we only warn if the
1364 size is different. If the size is the same, we simply let
1365 the old symbol override the new one as normally happens with
1366 symbols defined in dynamic objects. */
1368 if (! ((*info
->callbacks
->multiple_common
)
1369 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1372 if (sym
->st_size
> h
->size
)
1373 h
->size
= sym
->st_size
;
1375 *size_change_ok
= TRUE
;
1378 /* If we are looking at a dynamic object, and we have found a
1379 definition, we need to see if the symbol was already defined by
1380 some other object. If so, we want to use the existing
1381 definition, and we do not want to report a multiple symbol
1382 definition error; we do this by clobbering *PSEC to be
1383 bfd_und_section_ptr.
1385 We treat a common symbol as a definition if the symbol in the
1386 shared library is a function, since common symbols always
1387 represent variables; this can cause confusion in principle, but
1388 any such confusion would seem to indicate an erroneous program or
1389 shared library. We also permit a common symbol in a regular
1390 object to override a weak symbol in a shared object. */
1395 || (h
->root
.type
== bfd_link_hash_common
1396 && (newweak
|| newfunc
))))
1400 newdyncommon
= FALSE
;
1402 *psec
= sec
= bfd_und_section_ptr
;
1403 *size_change_ok
= TRUE
;
1405 /* If we get here when the old symbol is a common symbol, then
1406 we are explicitly letting it override a weak symbol or
1407 function in a dynamic object, and we don't want to warn about
1408 a type change. If the old symbol is a defined symbol, a type
1409 change warning may still be appropriate. */
1411 if (h
->root
.type
== bfd_link_hash_common
)
1412 *type_change_ok
= TRUE
;
1415 /* Handle the special case of an old common symbol merging with a
1416 new symbol which looks like a common symbol in a shared object.
1417 We change *PSEC and *PVALUE to make the new symbol look like a
1418 common symbol, and let _bfd_generic_link_add_one_symbol do the
1422 && h
->root
.type
== bfd_link_hash_common
)
1426 newdyncommon
= FALSE
;
1427 *pvalue
= sym
->st_size
;
1428 *psec
= sec
= bed
->common_section (oldsec
);
1429 *size_change_ok
= TRUE
;
1432 /* Skip weak definitions of symbols that are already defined. */
1433 if (newdef
&& olddef
&& newweak
)
1435 /* Don't skip new non-IR weak syms. */
1436 if (!(oldbfd
!= NULL
1437 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1438 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1444 /* Merge st_other. If the symbol already has a dynamic index,
1445 but visibility says it should not be visible, turn it into a
1447 elf_merge_st_other (abfd
, h
, sym
, newdef
, newdyn
);
1448 if (h
->dynindx
!= -1)
1449 switch (ELF_ST_VISIBILITY (h
->other
))
1453 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1458 /* If the old symbol is from a dynamic object, and the new symbol is
1459 a definition which is not from a dynamic object, then the new
1460 symbol overrides the old symbol. Symbols from regular files
1461 always take precedence over symbols from dynamic objects, even if
1462 they are defined after the dynamic object in the link.
1464 As above, we again permit a common symbol in a regular object to
1465 override a definition in a shared object if the shared object
1466 symbol is a function or is weak. */
1471 || (bfd_is_com_section (sec
)
1472 && (oldweak
|| oldfunc
)))
1477 /* Change the hash table entry to undefined, and let
1478 _bfd_generic_link_add_one_symbol do the right thing with the
1481 h
->root
.type
= bfd_link_hash_undefined
;
1482 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1483 *size_change_ok
= TRUE
;
1486 olddyncommon
= FALSE
;
1488 /* We again permit a type change when a common symbol may be
1489 overriding a function. */
1491 if (bfd_is_com_section (sec
))
1495 /* If a common symbol overrides a function, make sure
1496 that it isn't defined dynamically nor has type
1499 h
->type
= STT_NOTYPE
;
1501 *type_change_ok
= TRUE
;
1504 if (hi
->root
.type
== bfd_link_hash_indirect
)
1507 /* This union may have been set to be non-NULL when this symbol
1508 was seen in a dynamic object. We must force the union to be
1509 NULL, so that it is correct for a regular symbol. */
1510 h
->verinfo
.vertree
= NULL
;
1513 /* Handle the special case of a new common symbol merging with an
1514 old symbol that looks like it might be a common symbol defined in
1515 a shared object. Note that we have already handled the case in
1516 which a new common symbol should simply override the definition
1517 in the shared library. */
1520 && bfd_is_com_section (sec
)
1523 /* It would be best if we could set the hash table entry to a
1524 common symbol, but we don't know what to use for the section
1525 or the alignment. */
1526 if (! ((*info
->callbacks
->multiple_common
)
1527 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1530 /* If the presumed common symbol in the dynamic object is
1531 larger, pretend that the new symbol has its size. */
1533 if (h
->size
> *pvalue
)
1536 /* We need to remember the alignment required by the symbol
1537 in the dynamic object. */
1538 BFD_ASSERT (pold_alignment
);
1539 *pold_alignment
= h
->root
.u
.def
.section
->alignment_power
;
1542 olddyncommon
= FALSE
;
1544 h
->root
.type
= bfd_link_hash_undefined
;
1545 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1547 *size_change_ok
= TRUE
;
1548 *type_change_ok
= TRUE
;
1550 if (hi
->root
.type
== bfd_link_hash_indirect
)
1553 h
->verinfo
.vertree
= NULL
;
1558 /* Handle the case where we had a versioned symbol in a dynamic
1559 library and now find a definition in a normal object. In this
1560 case, we make the versioned symbol point to the normal one. */
1561 flip
->root
.type
= h
->root
.type
;
1562 flip
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
1563 h
->root
.type
= bfd_link_hash_indirect
;
1564 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) flip
;
1565 (*bed
->elf_backend_copy_indirect_symbol
) (info
, flip
, h
);
1569 flip
->ref_dynamic
= 1;
1576 /* This function is called to create an indirect symbol from the
1577 default for the symbol with the default version if needed. The
1578 symbol is described by H, NAME, SYM, SEC, and VALUE. We
1579 set DYNSYM if the new indirect symbol is dynamic. */
1582 _bfd_elf_add_default_symbol (bfd
*abfd
,
1583 struct bfd_link_info
*info
,
1584 struct elf_link_hash_entry
*h
,
1586 Elf_Internal_Sym
*sym
,
1590 bfd_boolean
*dynsym
)
1592 bfd_boolean type_change_ok
;
1593 bfd_boolean size_change_ok
;
1596 struct elf_link_hash_entry
*hi
;
1597 struct bfd_link_hash_entry
*bh
;
1598 const struct elf_backend_data
*bed
;
1599 bfd_boolean collect
;
1600 bfd_boolean dynamic
;
1601 bfd_boolean override
;
1603 size_t len
, shortlen
;
1606 /* If this symbol has a version, and it is the default version, we
1607 create an indirect symbol from the default name to the fully
1608 decorated name. This will cause external references which do not
1609 specify a version to be bound to this version of the symbol. */
1610 p
= strchr (name
, ELF_VER_CHR
);
1611 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
1614 bed
= get_elf_backend_data (abfd
);
1615 collect
= bed
->collect
;
1616 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
1618 shortlen
= p
- name
;
1619 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
1620 if (shortname
== NULL
)
1622 memcpy (shortname
, name
, shortlen
);
1623 shortname
[shortlen
] = '\0';
1625 /* We are going to create a new symbol. Merge it with any existing
1626 symbol with this name. For the purposes of the merge, act as
1627 though we were defining the symbol we just defined, although we
1628 actually going to define an indirect symbol. */
1629 type_change_ok
= FALSE
;
1630 size_change_ok
= FALSE
;
1632 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1633 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
1634 &type_change_ok
, &size_change_ok
))
1643 if (! (_bfd_generic_link_add_one_symbol
1644 (info
, abfd
, shortname
, BSF_INDIRECT
, bfd_ind_section_ptr
,
1645 0, name
, FALSE
, collect
, &bh
)))
1647 hi
= (struct elf_link_hash_entry
*) bh
;
1651 /* In this case the symbol named SHORTNAME is overriding the
1652 indirect symbol we want to add. We were planning on making
1653 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
1654 is the name without a version. NAME is the fully versioned
1655 name, and it is the default version.
1657 Overriding means that we already saw a definition for the
1658 symbol SHORTNAME in a regular object, and it is overriding
1659 the symbol defined in the dynamic object.
1661 When this happens, we actually want to change NAME, the
1662 symbol we just added, to refer to SHORTNAME. This will cause
1663 references to NAME in the shared object to become references
1664 to SHORTNAME in the regular object. This is what we expect
1665 when we override a function in a shared object: that the
1666 references in the shared object will be mapped to the
1667 definition in the regular object. */
1669 while (hi
->root
.type
== bfd_link_hash_indirect
1670 || hi
->root
.type
== bfd_link_hash_warning
)
1671 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1673 h
->root
.type
= bfd_link_hash_indirect
;
1674 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1678 hi
->ref_dynamic
= 1;
1682 if (! bfd_elf_link_record_dynamic_symbol (info
, hi
))
1687 /* Now set HI to H, so that the following code will set the
1688 other fields correctly. */
1692 /* Check if HI is a warning symbol. */
1693 if (hi
->root
.type
== bfd_link_hash_warning
)
1694 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1696 /* If there is a duplicate definition somewhere, then HI may not
1697 point to an indirect symbol. We will have reported an error to
1698 the user in that case. */
1700 if (hi
->root
.type
== bfd_link_hash_indirect
)
1702 struct elf_link_hash_entry
*ht
;
1704 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1705 (*bed
->elf_backend_copy_indirect_symbol
) (info
, ht
, hi
);
1707 /* A reference to the SHORTNAME symbol from a dynamic library
1708 will be satisfied by the versioned symbol at runtime. In
1709 effect, we have a reference to the versioned symbol. */
1710 ht
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
1711 hi
->dynamic_def
|= ht
->dynamic_def
;
1713 /* See if the new flags lead us to realize that the symbol must
1719 if (! info
->executable
1726 if (hi
->ref_regular
)
1732 /* We also need to define an indirection from the nondefault version
1736 len
= strlen (name
);
1737 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, len
);
1738 if (shortname
== NULL
)
1740 memcpy (shortname
, name
, shortlen
);
1741 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
1743 /* Once again, merge with any existing symbol. */
1744 type_change_ok
= FALSE
;
1745 size_change_ok
= FALSE
;
1747 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1748 &hi
, NULL
, NULL
, NULL
, &skip
, &override
,
1749 &type_change_ok
, &size_change_ok
))
1757 /* Here SHORTNAME is a versioned name, so we don't expect to see
1758 the type of override we do in the case above unless it is
1759 overridden by a versioned definition. */
1760 if (hi
->root
.type
!= bfd_link_hash_defined
1761 && hi
->root
.type
!= bfd_link_hash_defweak
)
1762 (*_bfd_error_handler
)
1763 (_("%B: unexpected redefinition of indirect versioned symbol `%s'"),
1769 if (! (_bfd_generic_link_add_one_symbol
1770 (info
, abfd
, shortname
, BSF_INDIRECT
,
1771 bfd_ind_section_ptr
, 0, name
, FALSE
, collect
, &bh
)))
1773 hi
= (struct elf_link_hash_entry
*) bh
;
1775 /* If there is a duplicate definition somewhere, then HI may not
1776 point to an indirect symbol. We will have reported an error
1777 to the user in that case. */
1779 if (hi
->root
.type
== bfd_link_hash_indirect
)
1781 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
1782 h
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
1783 hi
->dynamic_def
|= h
->dynamic_def
;
1785 /* See if the new flags lead us to realize that the symbol
1791 if (! info
->executable
1797 if (hi
->ref_regular
)
1807 /* This routine is used to export all defined symbols into the dynamic
1808 symbol table. It is called via elf_link_hash_traverse. */
1811 _bfd_elf_export_symbol (struct elf_link_hash_entry
*h
, void *data
)
1813 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
1815 /* Ignore indirect symbols. These are added by the versioning code. */
1816 if (h
->root
.type
== bfd_link_hash_indirect
)
1819 /* Ignore this if we won't export it. */
1820 if (!eif
->info
->export_dynamic
&& !h
->dynamic
)
1823 if (h
->dynindx
== -1
1824 && (h
->def_regular
|| h
->ref_regular
)
1825 && ! bfd_hide_sym_by_version (eif
->info
->version_info
,
1826 h
->root
.root
.string
))
1828 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
1838 /* Look through the symbols which are defined in other shared
1839 libraries and referenced here. Update the list of version
1840 dependencies. This will be put into the .gnu.version_r section.
1841 This function is called via elf_link_hash_traverse. */
1844 _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry
*h
,
1847 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
1848 Elf_Internal_Verneed
*t
;
1849 Elf_Internal_Vernaux
*a
;
1852 /* We only care about symbols defined in shared objects with version
1857 || h
->verinfo
.verdef
== NULL
)
1860 /* See if we already know about this version. */
1861 for (t
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1865 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
1868 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1869 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
1875 /* This is a new version. Add it to tree we are building. */
1880 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1883 rinfo
->failed
= TRUE
;
1887 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
1888 t
->vn_nextref
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1889 elf_tdata (rinfo
->info
->output_bfd
)->verref
= t
;
1893 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1896 rinfo
->failed
= TRUE
;
1900 /* Note that we are copying a string pointer here, and testing it
1901 above. If bfd_elf_string_from_elf_section is ever changed to
1902 discard the string data when low in memory, this will have to be
1904 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
1906 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
1907 a
->vna_nextptr
= t
->vn_auxptr
;
1909 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
1912 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
1919 /* Figure out appropriate versions for all the symbols. We may not
1920 have the version number script until we have read all of the input
1921 files, so until that point we don't know which symbols should be
1922 local. This function is called via elf_link_hash_traverse. */
1925 _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry
*h
, void *data
)
1927 struct elf_info_failed
*sinfo
;
1928 struct bfd_link_info
*info
;
1929 const struct elf_backend_data
*bed
;
1930 struct elf_info_failed eif
;
1934 sinfo
= (struct elf_info_failed
*) data
;
1937 /* Fix the symbol flags. */
1940 if (! _bfd_elf_fix_symbol_flags (h
, &eif
))
1943 sinfo
->failed
= TRUE
;
1947 /* We only need version numbers for symbols defined in regular
1949 if (!h
->def_regular
)
1952 bed
= get_elf_backend_data (info
->output_bfd
);
1953 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
1954 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
1956 struct bfd_elf_version_tree
*t
;
1961 /* There are two consecutive ELF_VER_CHR characters if this is
1962 not a hidden symbol. */
1964 if (*p
== ELF_VER_CHR
)
1970 /* If there is no version string, we can just return out. */
1978 /* Look for the version. If we find it, it is no longer weak. */
1979 for (t
= sinfo
->info
->version_info
; t
!= NULL
; t
= t
->next
)
1981 if (strcmp (t
->name
, p
) == 0)
1985 struct bfd_elf_version_expr
*d
;
1987 len
= p
- h
->root
.root
.string
;
1988 alc
= (char *) bfd_malloc (len
);
1991 sinfo
->failed
= TRUE
;
1994 memcpy (alc
, h
->root
.root
.string
, len
- 1);
1995 alc
[len
- 1] = '\0';
1996 if (alc
[len
- 2] == ELF_VER_CHR
)
1997 alc
[len
- 2] = '\0';
1999 h
->verinfo
.vertree
= t
;
2003 if (t
->globals
.list
!= NULL
)
2004 d
= (*t
->match
) (&t
->globals
, NULL
, alc
);
2006 /* See if there is anything to force this symbol to
2008 if (d
== NULL
&& t
->locals
.list
!= NULL
)
2010 d
= (*t
->match
) (&t
->locals
, NULL
, alc
);
2013 && ! info
->export_dynamic
)
2014 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2022 /* If we are building an application, we need to create a
2023 version node for this version. */
2024 if (t
== NULL
&& info
->executable
)
2026 struct bfd_elf_version_tree
**pp
;
2029 /* If we aren't going to export this symbol, we don't need
2030 to worry about it. */
2031 if (h
->dynindx
== -1)
2035 t
= (struct bfd_elf_version_tree
*) bfd_zalloc (info
->output_bfd
, amt
);
2038 sinfo
->failed
= TRUE
;
2043 t
->name_indx
= (unsigned int) -1;
2047 /* Don't count anonymous version tag. */
2048 if (sinfo
->info
->version_info
!= NULL
2049 && sinfo
->info
->version_info
->vernum
== 0)
2051 for (pp
= &sinfo
->info
->version_info
;
2055 t
->vernum
= version_index
;
2059 h
->verinfo
.vertree
= t
;
2063 /* We could not find the version for a symbol when
2064 generating a shared archive. Return an error. */
2065 (*_bfd_error_handler
)
2066 (_("%B: version node not found for symbol %s"),
2067 info
->output_bfd
, h
->root
.root
.string
);
2068 bfd_set_error (bfd_error_bad_value
);
2069 sinfo
->failed
= TRUE
;
2077 /* If we don't have a version for this symbol, see if we can find
2079 if (h
->verinfo
.vertree
== NULL
&& sinfo
->info
->version_info
!= NULL
)
2084 = bfd_find_version_for_sym (sinfo
->info
->version_info
,
2085 h
->root
.root
.string
, &hide
);
2086 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2087 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2093 /* Read and swap the relocs from the section indicated by SHDR. This
2094 may be either a REL or a RELA section. The relocations are
2095 translated into RELA relocations and stored in INTERNAL_RELOCS,
2096 which should have already been allocated to contain enough space.
2097 The EXTERNAL_RELOCS are a buffer where the external form of the
2098 relocations should be stored.
2100 Returns FALSE if something goes wrong. */
2103 elf_link_read_relocs_from_section (bfd
*abfd
,
2105 Elf_Internal_Shdr
*shdr
,
2106 void *external_relocs
,
2107 Elf_Internal_Rela
*internal_relocs
)
2109 const struct elf_backend_data
*bed
;
2110 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2111 const bfd_byte
*erela
;
2112 const bfd_byte
*erelaend
;
2113 Elf_Internal_Rela
*irela
;
2114 Elf_Internal_Shdr
*symtab_hdr
;
2117 /* Position ourselves at the start of the section. */
2118 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2121 /* Read the relocations. */
2122 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2125 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2126 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
2128 bed
= get_elf_backend_data (abfd
);
2130 /* Convert the external relocations to the internal format. */
2131 if (shdr
->sh_entsize
== bed
->s
->sizeof_rel
)
2132 swap_in
= bed
->s
->swap_reloc_in
;
2133 else if (shdr
->sh_entsize
== bed
->s
->sizeof_rela
)
2134 swap_in
= bed
->s
->swap_reloca_in
;
2137 bfd_set_error (bfd_error_wrong_format
);
2141 erela
= (const bfd_byte
*) external_relocs
;
2142 erelaend
= erela
+ shdr
->sh_size
;
2143 irela
= internal_relocs
;
2144 while (erela
< erelaend
)
2148 (*swap_in
) (abfd
, erela
, irela
);
2149 r_symndx
= ELF32_R_SYM (irela
->r_info
);
2150 if (bed
->s
->arch_size
== 64)
2154 if ((size_t) r_symndx
>= nsyms
)
2156 (*_bfd_error_handler
)
2157 (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)"
2158 " for offset 0x%lx in section `%A'"),
2160 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2161 bfd_set_error (bfd_error_bad_value
);
2165 else if (r_symndx
!= STN_UNDEF
)
2167 (*_bfd_error_handler
)
2168 (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'"
2169 " when the object file has no symbol table"),
2171 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2172 bfd_set_error (bfd_error_bad_value
);
2175 irela
+= bed
->s
->int_rels_per_ext_rel
;
2176 erela
+= shdr
->sh_entsize
;
2182 /* Read and swap the relocs for a section O. They may have been
2183 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2184 not NULL, they are used as buffers to read into. They are known to
2185 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2186 the return value is allocated using either malloc or bfd_alloc,
2187 according to the KEEP_MEMORY argument. If O has two relocation
2188 sections (both REL and RELA relocations), then the REL_HDR
2189 relocations will appear first in INTERNAL_RELOCS, followed by the
2190 RELA_HDR relocations. */
2193 _bfd_elf_link_read_relocs (bfd
*abfd
,
2195 void *external_relocs
,
2196 Elf_Internal_Rela
*internal_relocs
,
2197 bfd_boolean keep_memory
)
2199 void *alloc1
= NULL
;
2200 Elf_Internal_Rela
*alloc2
= NULL
;
2201 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2202 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
2203 Elf_Internal_Rela
*internal_rela_relocs
;
2205 if (esdo
->relocs
!= NULL
)
2206 return esdo
->relocs
;
2208 if (o
->reloc_count
== 0)
2211 if (internal_relocs
== NULL
)
2215 size
= o
->reloc_count
;
2216 size
*= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
2218 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2220 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2221 if (internal_relocs
== NULL
)
2225 if (external_relocs
== NULL
)
2227 bfd_size_type size
= 0;
2230 size
+= esdo
->rel
.hdr
->sh_size
;
2232 size
+= esdo
->rela
.hdr
->sh_size
;
2234 alloc1
= bfd_malloc (size
);
2237 external_relocs
= alloc1
;
2240 internal_rela_relocs
= internal_relocs
;
2243 if (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rel
.hdr
,
2247 external_relocs
= (((bfd_byte
*) external_relocs
)
2248 + esdo
->rel
.hdr
->sh_size
);
2249 internal_rela_relocs
+= (NUM_SHDR_ENTRIES (esdo
->rel
.hdr
)
2250 * bed
->s
->int_rels_per_ext_rel
);
2254 && (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rela
.hdr
,
2256 internal_rela_relocs
)))
2259 /* Cache the results for next time, if we can. */
2261 esdo
->relocs
= internal_relocs
;
2266 /* Don't free alloc2, since if it was allocated we are passing it
2267 back (under the name of internal_relocs). */
2269 return internal_relocs
;
2277 bfd_release (abfd
, alloc2
);
2284 /* Compute the size of, and allocate space for, REL_HDR which is the
2285 section header for a section containing relocations for O. */
2288 _bfd_elf_link_size_reloc_section (bfd
*abfd
,
2289 struct bfd_elf_section_reloc_data
*reldata
)
2291 Elf_Internal_Shdr
*rel_hdr
= reldata
->hdr
;
2293 /* That allows us to calculate the size of the section. */
2294 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reldata
->count
;
2296 /* The contents field must last into write_object_contents, so we
2297 allocate it with bfd_alloc rather than malloc. Also since we
2298 cannot be sure that the contents will actually be filled in,
2299 we zero the allocated space. */
2300 rel_hdr
->contents
= (unsigned char *) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
2301 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
2304 if (reldata
->hashes
== NULL
&& reldata
->count
)
2306 struct elf_link_hash_entry
**p
;
2308 p
= (struct elf_link_hash_entry
**)
2309 bfd_zmalloc (reldata
->count
* sizeof (struct elf_link_hash_entry
*));
2313 reldata
->hashes
= p
;
2319 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
2320 originated from the section given by INPUT_REL_HDR) to the
2324 _bfd_elf_link_output_relocs (bfd
*output_bfd
,
2325 asection
*input_section
,
2326 Elf_Internal_Shdr
*input_rel_hdr
,
2327 Elf_Internal_Rela
*internal_relocs
,
2328 struct elf_link_hash_entry
**rel_hash
2331 Elf_Internal_Rela
*irela
;
2332 Elf_Internal_Rela
*irelaend
;
2334 struct bfd_elf_section_reloc_data
*output_reldata
;
2335 asection
*output_section
;
2336 const struct elf_backend_data
*bed
;
2337 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2338 struct bfd_elf_section_data
*esdo
;
2340 output_section
= input_section
->output_section
;
2342 bed
= get_elf_backend_data (output_bfd
);
2343 esdo
= elf_section_data (output_section
);
2344 if (esdo
->rel
.hdr
&& esdo
->rel
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2346 output_reldata
= &esdo
->rel
;
2347 swap_out
= bed
->s
->swap_reloc_out
;
2349 else if (esdo
->rela
.hdr
2350 && esdo
->rela
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2352 output_reldata
= &esdo
->rela
;
2353 swap_out
= bed
->s
->swap_reloca_out
;
2357 (*_bfd_error_handler
)
2358 (_("%B: relocation size mismatch in %B section %A"),
2359 output_bfd
, input_section
->owner
, input_section
);
2360 bfd_set_error (bfd_error_wrong_format
);
2364 erel
= output_reldata
->hdr
->contents
;
2365 erel
+= output_reldata
->count
* input_rel_hdr
->sh_entsize
;
2366 irela
= internal_relocs
;
2367 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
2368 * bed
->s
->int_rels_per_ext_rel
);
2369 while (irela
< irelaend
)
2371 (*swap_out
) (output_bfd
, irela
, erel
);
2372 irela
+= bed
->s
->int_rels_per_ext_rel
;
2373 erel
+= input_rel_hdr
->sh_entsize
;
2376 /* Bump the counter, so that we know where to add the next set of
2378 output_reldata
->count
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
2383 /* Make weak undefined symbols in PIE dynamic. */
2386 _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info
*info
,
2387 struct elf_link_hash_entry
*h
)
2391 && h
->root
.type
== bfd_link_hash_undefweak
)
2392 return bfd_elf_link_record_dynamic_symbol (info
, h
);
2397 /* Fix up the flags for a symbol. This handles various cases which
2398 can only be fixed after all the input files are seen. This is
2399 currently called by both adjust_dynamic_symbol and
2400 assign_sym_version, which is unnecessary but perhaps more robust in
2401 the face of future changes. */
2404 _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry
*h
,
2405 struct elf_info_failed
*eif
)
2407 const struct elf_backend_data
*bed
;
2409 /* If this symbol was mentioned in a non-ELF file, try to set
2410 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2411 permit a non-ELF file to correctly refer to a symbol defined in
2412 an ELF dynamic object. */
2415 while (h
->root
.type
== bfd_link_hash_indirect
)
2416 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2418 if (h
->root
.type
!= bfd_link_hash_defined
2419 && h
->root
.type
!= bfd_link_hash_defweak
)
2422 h
->ref_regular_nonweak
= 1;
2426 if (h
->root
.u
.def
.section
->owner
!= NULL
2427 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2428 == bfd_target_elf_flavour
))
2431 h
->ref_regular_nonweak
= 1;
2437 if (h
->dynindx
== -1
2441 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2450 /* Unfortunately, NON_ELF is only correct if the symbol
2451 was first seen in a non-ELF file. Fortunately, if the symbol
2452 was first seen in an ELF file, we're probably OK unless the
2453 symbol was defined in a non-ELF file. Catch that case here.
2454 FIXME: We're still in trouble if the symbol was first seen in
2455 a dynamic object, and then later in a non-ELF regular object. */
2456 if ((h
->root
.type
== bfd_link_hash_defined
2457 || h
->root
.type
== bfd_link_hash_defweak
)
2459 && (h
->root
.u
.def
.section
->owner
!= NULL
2460 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2461 != bfd_target_elf_flavour
)
2462 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
2463 && !h
->def_dynamic
)))
2467 /* Backend specific symbol fixup. */
2468 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
2469 if (bed
->elf_backend_fixup_symbol
2470 && !(*bed
->elf_backend_fixup_symbol
) (eif
->info
, h
))
2473 /* If this is a final link, and the symbol was defined as a common
2474 symbol in a regular object file, and there was no definition in
2475 any dynamic object, then the linker will have allocated space for
2476 the symbol in a common section but the DEF_REGULAR
2477 flag will not have been set. */
2478 if (h
->root
.type
== bfd_link_hash_defined
2482 && (h
->root
.u
.def
.section
->owner
->flags
& (DYNAMIC
| BFD_PLUGIN
)) == 0)
2485 /* If -Bsymbolic was used (which means to bind references to global
2486 symbols to the definition within the shared object), and this
2487 symbol was defined in a regular object, then it actually doesn't
2488 need a PLT entry. Likewise, if the symbol has non-default
2489 visibility. If the symbol has hidden or internal visibility, we
2490 will force it local. */
2492 && eif
->info
->shared
2493 && is_elf_hash_table (eif
->info
->hash
)
2494 && (SYMBOLIC_BIND (eif
->info
, h
)
2495 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2498 bfd_boolean force_local
;
2500 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
2501 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
2502 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
2505 /* If a weak undefined symbol has non-default visibility, we also
2506 hide it from the dynamic linker. */
2507 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2508 && h
->root
.type
== bfd_link_hash_undefweak
)
2509 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2511 /* If this is a weak defined symbol in a dynamic object, and we know
2512 the real definition in the dynamic object, copy interesting flags
2513 over to the real definition. */
2514 if (h
->u
.weakdef
!= NULL
)
2516 /* If the real definition is defined by a regular object file,
2517 don't do anything special. See the longer description in
2518 _bfd_elf_adjust_dynamic_symbol, below. */
2519 if (h
->u
.weakdef
->def_regular
)
2520 h
->u
.weakdef
= NULL
;
2523 struct elf_link_hash_entry
*weakdef
= h
->u
.weakdef
;
2525 while (h
->root
.type
== bfd_link_hash_indirect
)
2526 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2528 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2529 || h
->root
.type
== bfd_link_hash_defweak
);
2530 BFD_ASSERT (weakdef
->def_dynamic
);
2531 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
2532 || weakdef
->root
.type
== bfd_link_hash_defweak
);
2533 (*bed
->elf_backend_copy_indirect_symbol
) (eif
->info
, weakdef
, h
);
2540 /* Make the backend pick a good value for a dynamic symbol. This is
2541 called via elf_link_hash_traverse, and also calls itself
2545 _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry
*h
, void *data
)
2547 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2549 const struct elf_backend_data
*bed
;
2551 if (! is_elf_hash_table (eif
->info
->hash
))
2554 /* Ignore indirect symbols. These are added by the versioning code. */
2555 if (h
->root
.type
== bfd_link_hash_indirect
)
2558 /* Fix the symbol flags. */
2559 if (! _bfd_elf_fix_symbol_flags (h
, eif
))
2562 /* If this symbol does not require a PLT entry, and it is not
2563 defined by a dynamic object, or is not referenced by a regular
2564 object, ignore it. We do have to handle a weak defined symbol,
2565 even if no regular object refers to it, if we decided to add it
2566 to the dynamic symbol table. FIXME: Do we normally need to worry
2567 about symbols which are defined by one dynamic object and
2568 referenced by another one? */
2570 && h
->type
!= STT_GNU_IFUNC
2574 && (h
->u
.weakdef
== NULL
|| h
->u
.weakdef
->dynindx
== -1))))
2576 h
->plt
= elf_hash_table (eif
->info
)->init_plt_offset
;
2580 /* If we've already adjusted this symbol, don't do it again. This
2581 can happen via a recursive call. */
2582 if (h
->dynamic_adjusted
)
2585 /* Don't look at this symbol again. Note that we must set this
2586 after checking the above conditions, because we may look at a
2587 symbol once, decide not to do anything, and then get called
2588 recursively later after REF_REGULAR is set below. */
2589 h
->dynamic_adjusted
= 1;
2591 /* If this is a weak definition, and we know a real definition, and
2592 the real symbol is not itself defined by a regular object file,
2593 then get a good value for the real definition. We handle the
2594 real symbol first, for the convenience of the backend routine.
2596 Note that there is a confusing case here. If the real definition
2597 is defined by a regular object file, we don't get the real symbol
2598 from the dynamic object, but we do get the weak symbol. If the
2599 processor backend uses a COPY reloc, then if some routine in the
2600 dynamic object changes the real symbol, we will not see that
2601 change in the corresponding weak symbol. This is the way other
2602 ELF linkers work as well, and seems to be a result of the shared
2605 I will clarify this issue. Most SVR4 shared libraries define the
2606 variable _timezone and define timezone as a weak synonym. The
2607 tzset call changes _timezone. If you write
2608 extern int timezone;
2610 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
2611 you might expect that, since timezone is a synonym for _timezone,
2612 the same number will print both times. However, if the processor
2613 backend uses a COPY reloc, then actually timezone will be copied
2614 into your process image, and, since you define _timezone
2615 yourself, _timezone will not. Thus timezone and _timezone will
2616 wind up at different memory locations. The tzset call will set
2617 _timezone, leaving timezone unchanged. */
2619 if (h
->u
.weakdef
!= NULL
)
2621 /* If we get to this point, there is an implicit reference to
2622 H->U.WEAKDEF by a regular object file via the weak symbol H. */
2623 h
->u
.weakdef
->ref_regular
= 1;
2625 /* Ensure that the backend adjust_dynamic_symbol function sees
2626 H->U.WEAKDEF before H by recursively calling ourselves. */
2627 if (! _bfd_elf_adjust_dynamic_symbol (h
->u
.weakdef
, eif
))
2631 /* If a symbol has no type and no size and does not require a PLT
2632 entry, then we are probably about to do the wrong thing here: we
2633 are probably going to create a COPY reloc for an empty object.
2634 This case can arise when a shared object is built with assembly
2635 code, and the assembly code fails to set the symbol type. */
2637 && h
->type
== STT_NOTYPE
2639 (*_bfd_error_handler
)
2640 (_("warning: type and size of dynamic symbol `%s' are not defined"),
2641 h
->root
.root
.string
);
2643 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
2644 bed
= get_elf_backend_data (dynobj
);
2646 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
2655 /* Adjust the dynamic symbol, H, for copy in the dynamic bss section,
2659 _bfd_elf_adjust_dynamic_copy (struct elf_link_hash_entry
*h
,
2662 unsigned int power_of_two
;
2664 asection
*sec
= h
->root
.u
.def
.section
;
2666 /* The section aligment of definition is the maximum alignment
2667 requirement of symbols defined in the section. Since we don't
2668 know the symbol alignment requirement, we start with the
2669 maximum alignment and check low bits of the symbol address
2670 for the minimum alignment. */
2671 power_of_two
= bfd_get_section_alignment (sec
->owner
, sec
);
2672 mask
= ((bfd_vma
) 1 << power_of_two
) - 1;
2673 while ((h
->root
.u
.def
.value
& mask
) != 0)
2679 if (power_of_two
> bfd_get_section_alignment (dynbss
->owner
,
2682 /* Adjust the section alignment if needed. */
2683 if (! bfd_set_section_alignment (dynbss
->owner
, dynbss
,
2688 /* We make sure that the symbol will be aligned properly. */
2689 dynbss
->size
= BFD_ALIGN (dynbss
->size
, mask
+ 1);
2691 /* Define the symbol as being at this point in DYNBSS. */
2692 h
->root
.u
.def
.section
= dynbss
;
2693 h
->root
.u
.def
.value
= dynbss
->size
;
2695 /* Increment the size of DYNBSS to make room for the symbol. */
2696 dynbss
->size
+= h
->size
;
2701 /* Adjust all external symbols pointing into SEC_MERGE sections
2702 to reflect the object merging within the sections. */
2705 _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry
*h
, void *data
)
2709 if ((h
->root
.type
== bfd_link_hash_defined
2710 || h
->root
.type
== bfd_link_hash_defweak
)
2711 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
2712 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
2714 bfd
*output_bfd
= (bfd
*) data
;
2716 h
->root
.u
.def
.value
=
2717 _bfd_merged_section_offset (output_bfd
,
2718 &h
->root
.u
.def
.section
,
2719 elf_section_data (sec
)->sec_info
,
2720 h
->root
.u
.def
.value
);
2726 /* Returns false if the symbol referred to by H should be considered
2727 to resolve local to the current module, and true if it should be
2728 considered to bind dynamically. */
2731 _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
2732 struct bfd_link_info
*info
,
2733 bfd_boolean not_local_protected
)
2735 bfd_boolean binding_stays_local_p
;
2736 const struct elf_backend_data
*bed
;
2737 struct elf_link_hash_table
*hash_table
;
2742 while (h
->root
.type
== bfd_link_hash_indirect
2743 || h
->root
.type
== bfd_link_hash_warning
)
2744 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2746 /* If it was forced local, then clearly it's not dynamic. */
2747 if (h
->dynindx
== -1)
2749 if (h
->forced_local
)
2752 /* Identify the cases where name binding rules say that a
2753 visible symbol resolves locally. */
2754 binding_stays_local_p
= info
->executable
|| SYMBOLIC_BIND (info
, h
);
2756 switch (ELF_ST_VISIBILITY (h
->other
))
2763 hash_table
= elf_hash_table (info
);
2764 if (!is_elf_hash_table (hash_table
))
2767 bed
= get_elf_backend_data (hash_table
->dynobj
);
2769 /* Proper resolution for function pointer equality may require
2770 that these symbols perhaps be resolved dynamically, even though
2771 we should be resolving them to the current module. */
2772 if (!not_local_protected
|| !bed
->is_function_type (h
->type
))
2773 binding_stays_local_p
= TRUE
;
2780 /* If it isn't defined locally, then clearly it's dynamic. */
2781 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2784 /* Otherwise, the symbol is dynamic if binding rules don't tell
2785 us that it remains local. */
2786 return !binding_stays_local_p
;
2789 /* Return true if the symbol referred to by H should be considered
2790 to resolve local to the current module, and false otherwise. Differs
2791 from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of
2792 undefined symbols. The two functions are virtually identical except
2793 for the place where forced_local and dynindx == -1 are tested. If
2794 either of those tests are true, _bfd_elf_dynamic_symbol_p will say
2795 the symbol is local, while _bfd_elf_symbol_refs_local_p will say
2796 the symbol is local only for defined symbols.
2797 It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as
2798 !_bfd_elf_symbol_refs_local_p, except that targets differ in their
2799 treatment of undefined weak symbols. For those that do not make
2800 undefined weak symbols dynamic, both functions may return false. */
2803 _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry
*h
,
2804 struct bfd_link_info
*info
,
2805 bfd_boolean local_protected
)
2807 const struct elf_backend_data
*bed
;
2808 struct elf_link_hash_table
*hash_table
;
2810 /* If it's a local sym, of course we resolve locally. */
2814 /* STV_HIDDEN or STV_INTERNAL ones must be local. */
2815 if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
2816 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
2819 /* Common symbols that become definitions don't get the DEF_REGULAR
2820 flag set, so test it first, and don't bail out. */
2821 if (ELF_COMMON_DEF_P (h
))
2823 /* If we don't have a definition in a regular file, then we can't
2824 resolve locally. The sym is either undefined or dynamic. */
2825 else if (!h
->def_regular
)
2828 /* Forced local symbols resolve locally. */
2829 if (h
->forced_local
)
2832 /* As do non-dynamic symbols. */
2833 if (h
->dynindx
== -1)
2836 /* At this point, we know the symbol is defined and dynamic. In an
2837 executable it must resolve locally, likewise when building symbolic
2838 shared libraries. */
2839 if (info
->executable
|| SYMBOLIC_BIND (info
, h
))
2842 /* Now deal with defined dynamic symbols in shared libraries. Ones
2843 with default visibility might not resolve locally. */
2844 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
2847 hash_table
= elf_hash_table (info
);
2848 if (!is_elf_hash_table (hash_table
))
2851 bed
= get_elf_backend_data (hash_table
->dynobj
);
2853 /* STV_PROTECTED non-function symbols are local. */
2854 if (!bed
->is_function_type (h
->type
))
2857 /* Function pointer equality tests may require that STV_PROTECTED
2858 symbols be treated as dynamic symbols. If the address of a
2859 function not defined in an executable is set to that function's
2860 plt entry in the executable, then the address of the function in
2861 a shared library must also be the plt entry in the executable. */
2862 return local_protected
;
2865 /* Caches some TLS segment info, and ensures that the TLS segment vma is
2866 aligned. Returns the first TLS output section. */
2868 struct bfd_section
*
2869 _bfd_elf_tls_setup (bfd
*obfd
, struct bfd_link_info
*info
)
2871 struct bfd_section
*sec
, *tls
;
2872 unsigned int align
= 0;
2874 for (sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2875 if ((sec
->flags
& SEC_THREAD_LOCAL
) != 0)
2879 for (; sec
!= NULL
&& (sec
->flags
& SEC_THREAD_LOCAL
) != 0; sec
= sec
->next
)
2880 if (sec
->alignment_power
> align
)
2881 align
= sec
->alignment_power
;
2883 elf_hash_table (info
)->tls_sec
= tls
;
2885 /* Ensure the alignment of the first section is the largest alignment,
2886 so that the tls segment starts aligned. */
2888 tls
->alignment_power
= align
;
2893 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
2895 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
2896 Elf_Internal_Sym
*sym
)
2898 const struct elf_backend_data
*bed
;
2900 /* Local symbols do not count, but target specific ones might. */
2901 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
2902 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
2905 bed
= get_elf_backend_data (abfd
);
2906 /* Function symbols do not count. */
2907 if (bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)))
2910 /* If the section is undefined, then so is the symbol. */
2911 if (sym
->st_shndx
== SHN_UNDEF
)
2914 /* If the symbol is defined in the common section, then
2915 it is a common definition and so does not count. */
2916 if (bed
->common_definition (sym
))
2919 /* If the symbol is in a target specific section then we
2920 must rely upon the backend to tell us what it is. */
2921 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
2922 /* FIXME - this function is not coded yet:
2924 return _bfd_is_global_symbol_definition (abfd, sym);
2926 Instead for now assume that the definition is not global,
2927 Even if this is wrong, at least the linker will behave
2928 in the same way that it used to do. */
2934 /* Search the symbol table of the archive element of the archive ABFD
2935 whose archive map contains a mention of SYMDEF, and determine if
2936 the symbol is defined in this element. */
2938 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
2940 Elf_Internal_Shdr
* hdr
;
2941 bfd_size_type symcount
;
2942 bfd_size_type extsymcount
;
2943 bfd_size_type extsymoff
;
2944 Elf_Internal_Sym
*isymbuf
;
2945 Elf_Internal_Sym
*isym
;
2946 Elf_Internal_Sym
*isymend
;
2949 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
2953 if (! bfd_check_format (abfd
, bfd_object
))
2956 /* If we have already included the element containing this symbol in the
2957 link then we do not need to include it again. Just claim that any symbol
2958 it contains is not a definition, so that our caller will not decide to
2959 (re)include this element. */
2960 if (abfd
->archive_pass
)
2963 /* Select the appropriate symbol table. */
2964 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
2965 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2967 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
2969 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
2971 /* The sh_info field of the symtab header tells us where the
2972 external symbols start. We don't care about the local symbols. */
2973 if (elf_bad_symtab (abfd
))
2975 extsymcount
= symcount
;
2980 extsymcount
= symcount
- hdr
->sh_info
;
2981 extsymoff
= hdr
->sh_info
;
2984 if (extsymcount
== 0)
2987 /* Read in the symbol table. */
2988 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
2990 if (isymbuf
== NULL
)
2993 /* Scan the symbol table looking for SYMDEF. */
2995 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
2999 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3004 if (strcmp (name
, symdef
->name
) == 0)
3006 result
= is_global_data_symbol_definition (abfd
, isym
);
3016 /* Add an entry to the .dynamic table. */
3019 _bfd_elf_add_dynamic_entry (struct bfd_link_info
*info
,
3023 struct elf_link_hash_table
*hash_table
;
3024 const struct elf_backend_data
*bed
;
3026 bfd_size_type newsize
;
3027 bfd_byte
*newcontents
;
3028 Elf_Internal_Dyn dyn
;
3030 hash_table
= elf_hash_table (info
);
3031 if (! is_elf_hash_table (hash_table
))
3034 bed
= get_elf_backend_data (hash_table
->dynobj
);
3035 s
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3036 BFD_ASSERT (s
!= NULL
);
3038 newsize
= s
->size
+ bed
->s
->sizeof_dyn
;
3039 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
3040 if (newcontents
== NULL
)
3044 dyn
.d_un
.d_val
= val
;
3045 bed
->s
->swap_dyn_out (hash_table
->dynobj
, &dyn
, newcontents
+ s
->size
);
3048 s
->contents
= newcontents
;
3053 /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true,
3054 otherwise just check whether one already exists. Returns -1 on error,
3055 1 if a DT_NEEDED tag already exists, and 0 on success. */
3058 elf_add_dt_needed_tag (bfd
*abfd
,
3059 struct bfd_link_info
*info
,
3063 struct elf_link_hash_table
*hash_table
;
3064 bfd_size_type strindex
;
3066 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
3069 hash_table
= elf_hash_table (info
);
3070 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, soname
, FALSE
);
3071 if (strindex
== (bfd_size_type
) -1)
3074 if (_bfd_elf_strtab_refcount (hash_table
->dynstr
, strindex
) != 1)
3077 const struct elf_backend_data
*bed
;
3080 bed
= get_elf_backend_data (hash_table
->dynobj
);
3081 sdyn
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3083 for (extdyn
= sdyn
->contents
;
3084 extdyn
< sdyn
->contents
+ sdyn
->size
;
3085 extdyn
+= bed
->s
->sizeof_dyn
)
3087 Elf_Internal_Dyn dyn
;
3089 bed
->s
->swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3090 if (dyn
.d_tag
== DT_NEEDED
3091 && dyn
.d_un
.d_val
== strindex
)
3093 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3101 if (!_bfd_elf_link_create_dynamic_sections (hash_table
->dynobj
, info
))
3104 if (!_bfd_elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
3108 /* We were just checking for existence of the tag. */
3109 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3115 on_needed_list (const char *soname
, struct bfd_link_needed_list
*needed
)
3117 for (; needed
!= NULL
; needed
= needed
->next
)
3118 if (strcmp (soname
, needed
->name
) == 0)
3124 /* Sort symbol by value, section, and size. */
3126 elf_sort_symbol (const void *arg1
, const void *arg2
)
3128 const struct elf_link_hash_entry
*h1
;
3129 const struct elf_link_hash_entry
*h2
;
3130 bfd_signed_vma vdiff
;
3132 h1
= *(const struct elf_link_hash_entry
**) arg1
;
3133 h2
= *(const struct elf_link_hash_entry
**) arg2
;
3134 vdiff
= h1
->root
.u
.def
.value
- h2
->root
.u
.def
.value
;
3136 return vdiff
> 0 ? 1 : -1;
3139 long sdiff
= h1
->root
.u
.def
.section
->id
- h2
->root
.u
.def
.section
->id
;
3141 return sdiff
> 0 ? 1 : -1;
3143 vdiff
= h1
->size
- h2
->size
;
3144 return vdiff
== 0 ? 0 : vdiff
> 0 ? 1 : -1;
3147 /* This function is used to adjust offsets into .dynstr for
3148 dynamic symbols. This is called via elf_link_hash_traverse. */
3151 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
3153 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3155 if (h
->dynindx
!= -1)
3156 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3160 /* Assign string offsets in .dynstr, update all structures referencing
3164 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
3166 struct elf_link_hash_table
*hash_table
= elf_hash_table (info
);
3167 struct elf_link_local_dynamic_entry
*entry
;
3168 struct elf_strtab_hash
*dynstr
= hash_table
->dynstr
;
3169 bfd
*dynobj
= hash_table
->dynobj
;
3172 const struct elf_backend_data
*bed
;
3175 _bfd_elf_strtab_finalize (dynstr
);
3176 size
= _bfd_elf_strtab_size (dynstr
);
3178 bed
= get_elf_backend_data (dynobj
);
3179 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3180 BFD_ASSERT (sdyn
!= NULL
);
3182 /* Update all .dynamic entries referencing .dynstr strings. */
3183 for (extdyn
= sdyn
->contents
;
3184 extdyn
< sdyn
->contents
+ sdyn
->size
;
3185 extdyn
+= bed
->s
->sizeof_dyn
)
3187 Elf_Internal_Dyn dyn
;
3189 bed
->s
->swap_dyn_in (dynobj
, extdyn
, &dyn
);
3193 dyn
.d_un
.d_val
= size
;
3203 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3208 bed
->s
->swap_dyn_out (dynobj
, &dyn
, extdyn
);
3211 /* Now update local dynamic symbols. */
3212 for (entry
= hash_table
->dynlocal
; entry
; entry
= entry
->next
)
3213 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3214 entry
->isym
.st_name
);
3216 /* And the rest of dynamic symbols. */
3217 elf_link_hash_traverse (hash_table
, elf_adjust_dynstr_offsets
, dynstr
);
3219 /* Adjust version definitions. */
3220 if (elf_tdata (output_bfd
)->cverdefs
)
3225 Elf_Internal_Verdef def
;
3226 Elf_Internal_Verdaux defaux
;
3228 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
3232 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3234 p
+= sizeof (Elf_External_Verdef
);
3235 if (def
.vd_aux
!= sizeof (Elf_External_Verdef
))
3237 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3239 _bfd_elf_swap_verdaux_in (output_bfd
,
3240 (Elf_External_Verdaux
*) p
, &defaux
);
3241 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3243 _bfd_elf_swap_verdaux_out (output_bfd
,
3244 &defaux
, (Elf_External_Verdaux
*) p
);
3245 p
+= sizeof (Elf_External_Verdaux
);
3248 while (def
.vd_next
);
3251 /* Adjust version references. */
3252 if (elf_tdata (output_bfd
)->verref
)
3257 Elf_Internal_Verneed need
;
3258 Elf_Internal_Vernaux needaux
;
3260 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
3264 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3266 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3267 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3268 (Elf_External_Verneed
*) p
);
3269 p
+= sizeof (Elf_External_Verneed
);
3270 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3272 _bfd_elf_swap_vernaux_in (output_bfd
,
3273 (Elf_External_Vernaux
*) p
, &needaux
);
3274 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3276 _bfd_elf_swap_vernaux_out (output_bfd
,
3278 (Elf_External_Vernaux
*) p
);
3279 p
+= sizeof (Elf_External_Vernaux
);
3282 while (need
.vn_next
);
3288 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3289 The default is to only match when the INPUT and OUTPUT are exactly
3293 _bfd_elf_default_relocs_compatible (const bfd_target
*input
,
3294 const bfd_target
*output
)
3296 return input
== output
;
3299 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3300 This version is used when different targets for the same architecture
3301 are virtually identical. */
3304 _bfd_elf_relocs_compatible (const bfd_target
*input
,
3305 const bfd_target
*output
)
3307 const struct elf_backend_data
*obed
, *ibed
;
3309 if (input
== output
)
3312 ibed
= xvec_get_elf_backend_data (input
);
3313 obed
= xvec_get_elf_backend_data (output
);
3315 if (ibed
->arch
!= obed
->arch
)
3318 /* If both backends are using this function, deem them compatible. */
3319 return ibed
->relocs_compatible
== obed
->relocs_compatible
;
3322 /* Make a special call to the linker "notice" function to tell it that
3323 we are about to handle an as-needed lib, or have finished
3324 processing the lib. */
3327 _bfd_elf_notice_as_needed (bfd
*ibfd
,
3328 struct bfd_link_info
*info
,
3329 enum notice_asneeded_action act
)
3331 return (*info
->callbacks
->notice
) (info
, NULL
, ibfd
, NULL
, act
, 0, NULL
);
3334 /* Add symbols from an ELF object file to the linker hash table. */
3337 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3339 Elf_Internal_Ehdr
*ehdr
;
3340 Elf_Internal_Shdr
*hdr
;
3341 bfd_size_type symcount
;
3342 bfd_size_type extsymcount
;
3343 bfd_size_type extsymoff
;
3344 struct elf_link_hash_entry
**sym_hash
;
3345 bfd_boolean dynamic
;
3346 Elf_External_Versym
*extversym
= NULL
;
3347 Elf_External_Versym
*ever
;
3348 struct elf_link_hash_entry
*weaks
;
3349 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
3350 bfd_size_type nondeflt_vers_cnt
= 0;
3351 Elf_Internal_Sym
*isymbuf
= NULL
;
3352 Elf_Internal_Sym
*isym
;
3353 Elf_Internal_Sym
*isymend
;
3354 const struct elf_backend_data
*bed
;
3355 bfd_boolean add_needed
;
3356 struct elf_link_hash_table
*htab
;
3358 void *alloc_mark
= NULL
;
3359 struct bfd_hash_entry
**old_table
= NULL
;
3360 unsigned int old_size
= 0;
3361 unsigned int old_count
= 0;
3362 void *old_tab
= NULL
;
3364 struct bfd_link_hash_entry
*old_undefs
= NULL
;
3365 struct bfd_link_hash_entry
*old_undefs_tail
= NULL
;
3366 long old_dynsymcount
= 0;
3367 bfd_size_type old_dynstr_size
= 0;
3371 htab
= elf_hash_table (info
);
3372 bed
= get_elf_backend_data (abfd
);
3374 if ((abfd
->flags
& DYNAMIC
) == 0)
3380 /* You can't use -r against a dynamic object. Also, there's no
3381 hope of using a dynamic object which does not exactly match
3382 the format of the output file. */
3383 if (info
->relocatable
3384 || !is_elf_hash_table (htab
)
3385 || info
->output_bfd
->xvec
!= abfd
->xvec
)
3387 if (info
->relocatable
)
3388 bfd_set_error (bfd_error_invalid_operation
);
3390 bfd_set_error (bfd_error_wrong_format
);
3395 ehdr
= elf_elfheader (abfd
);
3396 if (info
->warn_alternate_em
3397 && bed
->elf_machine_code
!= ehdr
->e_machine
3398 && ((bed
->elf_machine_alt1
!= 0
3399 && ehdr
->e_machine
== bed
->elf_machine_alt1
)
3400 || (bed
->elf_machine_alt2
!= 0
3401 && ehdr
->e_machine
== bed
->elf_machine_alt2
)))
3402 info
->callbacks
->einfo
3403 (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"),
3404 ehdr
->e_machine
, abfd
, bed
->elf_machine_code
);
3406 /* As a GNU extension, any input sections which are named
3407 .gnu.warning.SYMBOL are treated as warning symbols for the given
3408 symbol. This differs from .gnu.warning sections, which generate
3409 warnings when they are included in an output file. */
3410 /* PR 12761: Also generate this warning when building shared libraries. */
3411 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3415 name
= bfd_get_section_name (abfd
, s
);
3416 if (CONST_STRNEQ (name
, ".gnu.warning."))
3421 name
+= sizeof ".gnu.warning." - 1;
3423 /* If this is a shared object, then look up the symbol
3424 in the hash table. If it is there, and it is already
3425 been defined, then we will not be using the entry
3426 from this shared object, so we don't need to warn.
3427 FIXME: If we see the definition in a regular object
3428 later on, we will warn, but we shouldn't. The only
3429 fix is to keep track of what warnings we are supposed
3430 to emit, and then handle them all at the end of the
3434 struct elf_link_hash_entry
*h
;
3436 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
3438 /* FIXME: What about bfd_link_hash_common? */
3440 && (h
->root
.type
== bfd_link_hash_defined
3441 || h
->root
.type
== bfd_link_hash_defweak
))
3446 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
3450 if (! bfd_get_section_contents (abfd
, s
, msg
, 0, sz
))
3455 if (! (_bfd_generic_link_add_one_symbol
3456 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
3457 FALSE
, bed
->collect
, NULL
)))
3460 if (!info
->relocatable
&& info
->executable
)
3462 /* Clobber the section size so that the warning does
3463 not get copied into the output file. */
3466 /* Also set SEC_EXCLUDE, so that symbols defined in
3467 the warning section don't get copied to the output. */
3468 s
->flags
|= SEC_EXCLUDE
;
3476 /* If we are creating a shared library, create all the dynamic
3477 sections immediately. We need to attach them to something,
3478 so we attach them to this BFD, provided it is the right
3479 format. FIXME: If there are no input BFD's of the same
3480 format as the output, we can't make a shared library. */
3482 && is_elf_hash_table (htab
)
3483 && info
->output_bfd
->xvec
== abfd
->xvec
3484 && !htab
->dynamic_sections_created
)
3486 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
3490 else if (!is_elf_hash_table (htab
))
3494 const char *soname
= NULL
;
3496 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
3499 /* ld --just-symbols and dynamic objects don't mix very well.
3500 ld shouldn't allow it. */
3501 if ((s
= abfd
->sections
) != NULL
3502 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3505 /* If this dynamic lib was specified on the command line with
3506 --as-needed in effect, then we don't want to add a DT_NEEDED
3507 tag unless the lib is actually used. Similary for libs brought
3508 in by another lib's DT_NEEDED. When --no-add-needed is used
3509 on a dynamic lib, we don't want to add a DT_NEEDED entry for
3510 any dynamic library in DT_NEEDED tags in the dynamic lib at
3512 add_needed
= (elf_dyn_lib_class (abfd
)
3513 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
3514 | DYN_NO_NEEDED
)) == 0;
3516 s
= bfd_get_section_by_name (abfd
, ".dynamic");
3521 unsigned int elfsec
;
3522 unsigned long shlink
;
3524 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
3531 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
3532 if (elfsec
== SHN_BAD
)
3533 goto error_free_dyn
;
3534 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
3536 for (extdyn
= dynbuf
;
3537 extdyn
< dynbuf
+ s
->size
;
3538 extdyn
+= bed
->s
->sizeof_dyn
)
3540 Elf_Internal_Dyn dyn
;
3542 bed
->s
->swap_dyn_in (abfd
, extdyn
, &dyn
);
3543 if (dyn
.d_tag
== DT_SONAME
)
3545 unsigned int tagv
= dyn
.d_un
.d_val
;
3546 soname
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3548 goto error_free_dyn
;
3550 if (dyn
.d_tag
== DT_NEEDED
)
3552 struct bfd_link_needed_list
*n
, **pn
;
3554 unsigned int tagv
= dyn
.d_un
.d_val
;
3556 amt
= sizeof (struct bfd_link_needed_list
);
3557 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3558 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3559 if (n
== NULL
|| fnm
== NULL
)
3560 goto error_free_dyn
;
3561 amt
= strlen (fnm
) + 1;
3562 anm
= (char *) bfd_alloc (abfd
, amt
);
3564 goto error_free_dyn
;
3565 memcpy (anm
, fnm
, amt
);
3569 for (pn
= &htab
->needed
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3573 if (dyn
.d_tag
== DT_RUNPATH
)
3575 struct bfd_link_needed_list
*n
, **pn
;
3577 unsigned int tagv
= dyn
.d_un
.d_val
;
3579 amt
= sizeof (struct bfd_link_needed_list
);
3580 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3581 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3582 if (n
== NULL
|| fnm
== NULL
)
3583 goto error_free_dyn
;
3584 amt
= strlen (fnm
) + 1;
3585 anm
= (char *) bfd_alloc (abfd
, amt
);
3587 goto error_free_dyn
;
3588 memcpy (anm
, fnm
, amt
);
3592 for (pn
= & runpath
;
3598 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
3599 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
3601 struct bfd_link_needed_list
*n
, **pn
;
3603 unsigned int tagv
= dyn
.d_un
.d_val
;
3605 amt
= sizeof (struct bfd_link_needed_list
);
3606 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3607 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3608 if (n
== NULL
|| fnm
== NULL
)
3609 goto error_free_dyn
;
3610 amt
= strlen (fnm
) + 1;
3611 anm
= (char *) bfd_alloc (abfd
, amt
);
3613 goto error_free_dyn
;
3614 memcpy (anm
, fnm
, amt
);
3624 if (dyn
.d_tag
== DT_AUDIT
)
3626 unsigned int tagv
= dyn
.d_un
.d_val
;
3627 audit
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3634 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
3635 frees all more recently bfd_alloc'd blocks as well. */
3641 struct bfd_link_needed_list
**pn
;
3642 for (pn
= &htab
->runpath
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3647 /* We do not want to include any of the sections in a dynamic
3648 object in the output file. We hack by simply clobbering the
3649 list of sections in the BFD. This could be handled more
3650 cleanly by, say, a new section flag; the existing
3651 SEC_NEVER_LOAD flag is not the one we want, because that one
3652 still implies that the section takes up space in the output
3654 bfd_section_list_clear (abfd
);
3656 /* Find the name to use in a DT_NEEDED entry that refers to this
3657 object. If the object has a DT_SONAME entry, we use it.
3658 Otherwise, if the generic linker stuck something in
3659 elf_dt_name, we use that. Otherwise, we just use the file
3661 if (soname
== NULL
|| *soname
== '\0')
3663 soname
= elf_dt_name (abfd
);
3664 if (soname
== NULL
|| *soname
== '\0')
3665 soname
= bfd_get_filename (abfd
);
3668 /* Save the SONAME because sometimes the linker emulation code
3669 will need to know it. */
3670 elf_dt_name (abfd
) = soname
;
3672 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
3676 /* If we have already included this dynamic object in the
3677 link, just ignore it. There is no reason to include a
3678 particular dynamic object more than once. */
3682 /* Save the DT_AUDIT entry for the linker emulation code. */
3683 elf_dt_audit (abfd
) = audit
;
3686 /* If this is a dynamic object, we always link against the .dynsym
3687 symbol table, not the .symtab symbol table. The dynamic linker
3688 will only see the .dynsym symbol table, so there is no reason to
3689 look at .symtab for a dynamic object. */
3691 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
3692 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3694 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3696 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
3698 /* The sh_info field of the symtab header tells us where the
3699 external symbols start. We don't care about the local symbols at
3701 if (elf_bad_symtab (abfd
))
3703 extsymcount
= symcount
;
3708 extsymcount
= symcount
- hdr
->sh_info
;
3709 extsymoff
= hdr
->sh_info
;
3712 sym_hash
= elf_sym_hashes (abfd
);
3713 if (extsymcount
!= 0)
3715 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3717 if (isymbuf
== NULL
)
3720 if (sym_hash
== NULL
)
3722 /* We store a pointer to the hash table entry for each
3724 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
3725 sym_hash
= (struct elf_link_hash_entry
**) bfd_zalloc (abfd
, amt
);
3726 if (sym_hash
== NULL
)
3727 goto error_free_sym
;
3728 elf_sym_hashes (abfd
) = sym_hash
;
3734 /* Read in any version definitions. */
3735 if (!_bfd_elf_slurp_version_tables (abfd
,
3736 info
->default_imported_symver
))
3737 goto error_free_sym
;
3739 /* Read in the symbol versions, but don't bother to convert them
3740 to internal format. */
3741 if (elf_dynversym (abfd
) != 0)
3743 Elf_Internal_Shdr
*versymhdr
;
3745 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
3746 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
3747 if (extversym
== NULL
)
3748 goto error_free_sym
;
3749 amt
= versymhdr
->sh_size
;
3750 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
3751 || bfd_bread (extversym
, amt
, abfd
) != amt
)
3752 goto error_free_vers
;
3756 /* If we are loading an as-needed shared lib, save the symbol table
3757 state before we start adding symbols. If the lib turns out
3758 to be unneeded, restore the state. */
3759 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
3764 for (entsize
= 0, i
= 0; i
< htab
->root
.table
.size
; i
++)
3766 struct bfd_hash_entry
*p
;
3767 struct elf_link_hash_entry
*h
;
3769 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3771 h
= (struct elf_link_hash_entry
*) p
;
3772 entsize
+= htab
->root
.table
.entsize
;
3773 if (h
->root
.type
== bfd_link_hash_warning
)
3774 entsize
+= htab
->root
.table
.entsize
;
3778 tabsize
= htab
->root
.table
.size
* sizeof (struct bfd_hash_entry
*);
3779 old_tab
= bfd_malloc (tabsize
+ entsize
);
3780 if (old_tab
== NULL
)
3781 goto error_free_vers
;
3783 /* Remember the current objalloc pointer, so that all mem for
3784 symbols added can later be reclaimed. */
3785 alloc_mark
= bfd_hash_allocate (&htab
->root
.table
, 1);
3786 if (alloc_mark
== NULL
)
3787 goto error_free_vers
;
3789 /* Make a special call to the linker "notice" function to
3790 tell it that we are about to handle an as-needed lib. */
3791 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_as_needed
))
3792 goto error_free_vers
;
3794 /* Clone the symbol table. Remember some pointers into the
3795 symbol table, and dynamic symbol count. */
3796 old_ent
= (char *) old_tab
+ tabsize
;
3797 memcpy (old_tab
, htab
->root
.table
.table
, tabsize
);
3798 old_undefs
= htab
->root
.undefs
;
3799 old_undefs_tail
= htab
->root
.undefs_tail
;
3800 old_table
= htab
->root
.table
.table
;
3801 old_size
= htab
->root
.table
.size
;
3802 old_count
= htab
->root
.table
.count
;
3803 old_dynsymcount
= htab
->dynsymcount
;
3804 old_dynstr_size
= _bfd_elf_strtab_size (htab
->dynstr
);
3806 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
3808 struct bfd_hash_entry
*p
;
3809 struct elf_link_hash_entry
*h
;
3811 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3813 memcpy (old_ent
, p
, htab
->root
.table
.entsize
);
3814 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3815 h
= (struct elf_link_hash_entry
*) p
;
3816 if (h
->root
.type
== bfd_link_hash_warning
)
3818 memcpy (old_ent
, h
->root
.u
.i
.link
, htab
->root
.table
.entsize
);
3819 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3826 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
3827 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
3829 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
3833 asection
*sec
, *new_sec
;
3836 struct elf_link_hash_entry
*h
;
3837 struct elf_link_hash_entry
*hi
;
3838 bfd_boolean definition
;
3839 bfd_boolean size_change_ok
;
3840 bfd_boolean type_change_ok
;
3841 bfd_boolean new_weakdef
;
3842 bfd_boolean new_weak
;
3843 bfd_boolean old_weak
;
3844 bfd_boolean override
;
3846 unsigned int old_alignment
;
3851 flags
= BSF_NO_FLAGS
;
3853 value
= isym
->st_value
;
3854 common
= bed
->common_definition (isym
);
3856 bind
= ELF_ST_BIND (isym
->st_info
);
3860 /* This should be impossible, since ELF requires that all
3861 global symbols follow all local symbols, and that sh_info
3862 point to the first global symbol. Unfortunately, Irix 5
3867 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
3875 case STB_GNU_UNIQUE
:
3876 flags
= BSF_GNU_UNIQUE
;
3880 /* Leave it up to the processor backend. */
3884 if (isym
->st_shndx
== SHN_UNDEF
)
3885 sec
= bfd_und_section_ptr
;
3886 else if (isym
->st_shndx
== SHN_ABS
)
3887 sec
= bfd_abs_section_ptr
;
3888 else if (isym
->st_shndx
== SHN_COMMON
)
3890 sec
= bfd_com_section_ptr
;
3891 /* What ELF calls the size we call the value. What ELF
3892 calls the value we call the alignment. */
3893 value
= isym
->st_size
;
3897 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3899 sec
= bfd_abs_section_ptr
;
3900 else if (discarded_section (sec
))
3902 /* Symbols from discarded section are undefined. We keep
3904 sec
= bfd_und_section_ptr
;
3905 isym
->st_shndx
= SHN_UNDEF
;
3907 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
3911 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3914 goto error_free_vers
;
3916 if (isym
->st_shndx
== SHN_COMMON
3917 && (abfd
->flags
& BFD_PLUGIN
) != 0)
3919 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
3923 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
3925 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
3927 goto error_free_vers
;
3931 else if (isym
->st_shndx
== SHN_COMMON
3932 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
3933 && !info
->relocatable
)
3935 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
3939 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
3940 | SEC_LINKER_CREATED
);
3941 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
3943 goto error_free_vers
;
3947 else if (bed
->elf_add_symbol_hook
)
3949 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
3951 goto error_free_vers
;
3953 /* The hook function sets the name to NULL if this symbol
3954 should be skipped for some reason. */
3959 /* Sanity check that all possibilities were handled. */
3962 bfd_set_error (bfd_error_bad_value
);
3963 goto error_free_vers
;
3966 /* Silently discard TLS symbols from --just-syms. There's
3967 no way to combine a static TLS block with a new TLS block
3968 for this executable. */
3969 if (ELF_ST_TYPE (isym
->st_info
) == STT_TLS
3970 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3973 if (bfd_is_und_section (sec
)
3974 || bfd_is_com_section (sec
))
3979 size_change_ok
= FALSE
;
3980 type_change_ok
= bed
->type_change_ok
;
3986 if (is_elf_hash_table (htab
))
3988 Elf_Internal_Versym iver
;
3989 unsigned int vernum
= 0;
3994 if (info
->default_imported_symver
)
3995 /* Use the default symbol version created earlier. */
3996 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
4001 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
4003 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
4005 /* If this is a hidden symbol, or if it is not version
4006 1, we append the version name to the symbol name.
4007 However, we do not modify a non-hidden absolute symbol
4008 if it is not a function, because it might be the version
4009 symbol itself. FIXME: What if it isn't? */
4010 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
4012 && (!bfd_is_abs_section (sec
)
4013 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4016 size_t namelen
, verlen
, newlen
;
4019 if (isym
->st_shndx
!= SHN_UNDEF
)
4021 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4023 else if (vernum
> 1)
4025 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4031 (*_bfd_error_handler
)
4032 (_("%B: %s: invalid version %u (max %d)"),
4034 elf_tdata (abfd
)->cverdefs
);
4035 bfd_set_error (bfd_error_bad_value
);
4036 goto error_free_vers
;
4041 /* We cannot simply test for the number of
4042 entries in the VERNEED section since the
4043 numbers for the needed versions do not start
4045 Elf_Internal_Verneed
*t
;
4048 for (t
= elf_tdata (abfd
)->verref
;
4052 Elf_Internal_Vernaux
*a
;
4054 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4056 if (a
->vna_other
== vernum
)
4058 verstr
= a
->vna_nodename
;
4067 (*_bfd_error_handler
)
4068 (_("%B: %s: invalid needed version %d"),
4069 abfd
, name
, vernum
);
4070 bfd_set_error (bfd_error_bad_value
);
4071 goto error_free_vers
;
4075 namelen
= strlen (name
);
4076 verlen
= strlen (verstr
);
4077 newlen
= namelen
+ verlen
+ 2;
4078 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4079 && isym
->st_shndx
!= SHN_UNDEF
)
4082 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4083 if (newname
== NULL
)
4084 goto error_free_vers
;
4085 memcpy (newname
, name
, namelen
);
4086 p
= newname
+ namelen
;
4088 /* If this is a defined non-hidden version symbol,
4089 we add another @ to the name. This indicates the
4090 default version of the symbol. */
4091 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4092 && isym
->st_shndx
!= SHN_UNDEF
)
4094 memcpy (p
, verstr
, verlen
+ 1);
4099 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
4100 sym_hash
, &old_bfd
, &old_weak
,
4101 &old_alignment
, &skip
, &override
,
4102 &type_change_ok
, &size_change_ok
))
4103 goto error_free_vers
;
4112 while (h
->root
.type
== bfd_link_hash_indirect
4113 || h
->root
.type
== bfd_link_hash_warning
)
4114 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4116 if (elf_tdata (abfd
)->verdef
!= NULL
4119 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4122 if (! (_bfd_generic_link_add_one_symbol
4123 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, bed
->collect
,
4124 (struct bfd_link_hash_entry
**) sym_hash
)))
4125 goto error_free_vers
;
4128 /* We need to make sure that indirect symbol dynamic flags are
4131 while (h
->root
.type
== bfd_link_hash_indirect
4132 || h
->root
.type
== bfd_link_hash_warning
)
4133 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4137 new_weak
= (flags
& BSF_WEAK
) != 0;
4138 new_weakdef
= FALSE
;
4142 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4143 && is_elf_hash_table (htab
)
4144 && h
->u
.weakdef
== NULL
)
4146 /* Keep a list of all weak defined non function symbols from
4147 a dynamic object, using the weakdef field. Later in this
4148 function we will set the weakdef field to the correct
4149 value. We only put non-function symbols from dynamic
4150 objects on this list, because that happens to be the only
4151 time we need to know the normal symbol corresponding to a
4152 weak symbol, and the information is time consuming to
4153 figure out. If the weakdef field is not already NULL,
4154 then this symbol was already defined by some previous
4155 dynamic object, and we will be using that previous
4156 definition anyhow. */
4158 h
->u
.weakdef
= weaks
;
4163 /* Set the alignment of a common symbol. */
4164 if ((common
|| bfd_is_com_section (sec
))
4165 && h
->root
.type
== bfd_link_hash_common
)
4170 align
= bfd_log2 (isym
->st_value
);
4173 /* The new symbol is a common symbol in a shared object.
4174 We need to get the alignment from the section. */
4175 align
= new_sec
->alignment_power
;
4177 if (align
> old_alignment
)
4178 h
->root
.u
.c
.p
->alignment_power
= align
;
4180 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
4183 if (is_elf_hash_table (htab
))
4185 /* Set a flag in the hash table entry indicating the type of
4186 reference or definition we just found. A dynamic symbol
4187 is one which is referenced or defined by both a regular
4188 object and a shared object. */
4189 bfd_boolean dynsym
= FALSE
;
4191 /* Plugin symbols aren't normal. Don't set def_regular or
4192 ref_regular for them, or make them dynamic. */
4193 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4200 if (bind
!= STB_WEAK
)
4201 h
->ref_regular_nonweak
= 1;
4213 /* If the indirect symbol has been forced local, don't
4214 make the real symbol dynamic. */
4215 if ((h
== hi
|| !hi
->forced_local
)
4216 && (! info
->executable
4226 hi
->ref_dynamic
= 1;
4231 hi
->def_dynamic
= 1;
4234 /* If the indirect symbol has been forced local, don't
4235 make the real symbol dynamic. */
4236 if ((h
== hi
|| !hi
->forced_local
)
4239 || (h
->u
.weakdef
!= NULL
4241 && h
->u
.weakdef
->dynindx
!= -1)))
4245 /* Check to see if we need to add an indirect symbol for
4246 the default name. */
4248 || (!override
&& h
->root
.type
== bfd_link_hash_common
))
4249 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
4250 sec
, value
, &old_bfd
, &dynsym
))
4251 goto error_free_vers
;
4253 /* Check the alignment when a common symbol is involved. This
4254 can change when a common symbol is overridden by a normal
4255 definition or a common symbol is ignored due to the old
4256 normal definition. We need to make sure the maximum
4257 alignment is maintained. */
4258 if ((old_alignment
|| common
)
4259 && h
->root
.type
!= bfd_link_hash_common
)
4261 unsigned int common_align
;
4262 unsigned int normal_align
;
4263 unsigned int symbol_align
;
4267 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
4268 || h
->root
.type
== bfd_link_hash_defweak
);
4270 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
4271 if (h
->root
.u
.def
.section
->owner
!= NULL
4272 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
4274 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
4275 if (normal_align
> symbol_align
)
4276 normal_align
= symbol_align
;
4279 normal_align
= symbol_align
;
4283 common_align
= old_alignment
;
4284 common_bfd
= old_bfd
;
4289 common_align
= bfd_log2 (isym
->st_value
);
4291 normal_bfd
= old_bfd
;
4294 if (normal_align
< common_align
)
4296 /* PR binutils/2735 */
4297 if (normal_bfd
== NULL
)
4298 (*_bfd_error_handler
)
4299 (_("Warning: alignment %u of common symbol `%s' in %B is"
4300 " greater than the alignment (%u) of its section %A"),
4301 common_bfd
, h
->root
.u
.def
.section
,
4302 1 << common_align
, name
, 1 << normal_align
);
4304 (*_bfd_error_handler
)
4305 (_("Warning: alignment %u of symbol `%s' in %B"
4306 " is smaller than %u in %B"),
4307 normal_bfd
, common_bfd
,
4308 1 << normal_align
, name
, 1 << common_align
);
4312 /* Remember the symbol size if it isn't undefined. */
4313 if (isym
->st_size
!= 0
4314 && isym
->st_shndx
!= SHN_UNDEF
4315 && (definition
|| h
->size
== 0))
4318 && h
->size
!= isym
->st_size
4319 && ! size_change_ok
)
4320 (*_bfd_error_handler
)
4321 (_("Warning: size of symbol `%s' changed"
4322 " from %lu in %B to %lu in %B"),
4324 name
, (unsigned long) h
->size
,
4325 (unsigned long) isym
->st_size
);
4327 h
->size
= isym
->st_size
;
4330 /* If this is a common symbol, then we always want H->SIZE
4331 to be the size of the common symbol. The code just above
4332 won't fix the size if a common symbol becomes larger. We
4333 don't warn about a size change here, because that is
4334 covered by --warn-common. Allow changes between different
4336 if (h
->root
.type
== bfd_link_hash_common
)
4337 h
->size
= h
->root
.u
.c
.size
;
4339 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
4340 && ((definition
&& !new_weak
)
4341 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
4342 || h
->type
== STT_NOTYPE
))
4344 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
4346 /* Turn an IFUNC symbol from a DSO into a normal FUNC
4348 if (type
== STT_GNU_IFUNC
4349 && (abfd
->flags
& DYNAMIC
) != 0)
4352 if (h
->type
!= type
)
4354 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
4355 (*_bfd_error_handler
)
4356 (_("Warning: type of symbol `%s' changed"
4357 " from %d to %d in %B"),
4358 abfd
, name
, h
->type
, type
);
4364 /* Merge st_other field. */
4365 elf_merge_st_other (abfd
, h
, isym
, definition
, dynamic
);
4367 /* We don't want to make debug symbol dynamic. */
4368 if (definition
&& (sec
->flags
& SEC_DEBUGGING
) && !info
->relocatable
)
4371 /* Nor should we make plugin symbols dynamic. */
4372 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4377 h
->target_internal
= isym
->st_target_internal
;
4378 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
4381 if (definition
&& !dynamic
)
4383 char *p
= strchr (name
, ELF_VER_CHR
);
4384 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
4386 /* Queue non-default versions so that .symver x, x@FOO
4387 aliases can be checked. */
4390 amt
= ((isymend
- isym
+ 1)
4391 * sizeof (struct elf_link_hash_entry
*));
4393 (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4395 goto error_free_vers
;
4397 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
4401 if (dynsym
&& h
->dynindx
== -1)
4403 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4404 goto error_free_vers
;
4405 if (h
->u
.weakdef
!= NULL
4407 && h
->u
.weakdef
->dynindx
== -1)
4409 if (!bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
4410 goto error_free_vers
;
4413 else if (dynsym
&& h
->dynindx
!= -1)
4414 /* If the symbol already has a dynamic index, but
4415 visibility says it should not be visible, turn it into
4417 switch (ELF_ST_VISIBILITY (h
->other
))
4421 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4426 /* Don't add DT_NEEDED for references from the dummy bfd. */
4430 && h
->ref_regular_nonweak
4432 || (old_bfd
->flags
& BFD_PLUGIN
) == 0))
4433 || (h
->ref_dynamic_nonweak
4434 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
4435 && !on_needed_list (elf_dt_name (abfd
), htab
->needed
))))
4438 const char *soname
= elf_dt_name (abfd
);
4440 /* A symbol from a library loaded via DT_NEEDED of some
4441 other library is referenced by a regular object.
4442 Add a DT_NEEDED entry for it. Issue an error if
4443 --no-add-needed is used and the reference was not
4446 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
4448 (*_bfd_error_handler
)
4449 (_("%B: undefined reference to symbol '%s'"),
4451 bfd_set_error (bfd_error_missing_dso
);
4452 goto error_free_vers
;
4455 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
4456 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
4459 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
4461 goto error_free_vers
;
4463 BFD_ASSERT (ret
== 0);
4468 if (extversym
!= NULL
)
4474 if (isymbuf
!= NULL
)
4480 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4484 /* Restore the symbol table. */
4485 old_ent
= (char *) old_tab
+ tabsize
;
4486 memset (elf_sym_hashes (abfd
), 0,
4487 extsymcount
* sizeof (struct elf_link_hash_entry
*));
4488 htab
->root
.table
.table
= old_table
;
4489 htab
->root
.table
.size
= old_size
;
4490 htab
->root
.table
.count
= old_count
;
4491 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
4492 htab
->root
.undefs
= old_undefs
;
4493 htab
->root
.undefs_tail
= old_undefs_tail
;
4494 _bfd_elf_strtab_restore_size (htab
->dynstr
, old_dynstr_size
);
4495 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4497 struct bfd_hash_entry
*p
;
4498 struct elf_link_hash_entry
*h
;
4500 unsigned int alignment_power
;
4502 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4504 h
= (struct elf_link_hash_entry
*) p
;
4505 if (h
->root
.type
== bfd_link_hash_warning
)
4506 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4507 if (h
->dynindx
>= old_dynsymcount
4508 && h
->dynstr_index
< old_dynstr_size
)
4509 _bfd_elf_strtab_delref (htab
->dynstr
, h
->dynstr_index
);
4511 /* Preserve the maximum alignment and size for common
4512 symbols even if this dynamic lib isn't on DT_NEEDED
4513 since it can still be loaded at run time by another
4515 if (h
->root
.type
== bfd_link_hash_common
)
4517 size
= h
->root
.u
.c
.size
;
4518 alignment_power
= h
->root
.u
.c
.p
->alignment_power
;
4523 alignment_power
= 0;
4525 memcpy (p
, old_ent
, htab
->root
.table
.entsize
);
4526 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4527 h
= (struct elf_link_hash_entry
*) p
;
4528 if (h
->root
.type
== bfd_link_hash_warning
)
4530 memcpy (h
->root
.u
.i
.link
, old_ent
, htab
->root
.table
.entsize
);
4531 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4532 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4534 if (h
->root
.type
== bfd_link_hash_common
)
4536 if (size
> h
->root
.u
.c
.size
)
4537 h
->root
.u
.c
.size
= size
;
4538 if (alignment_power
> h
->root
.u
.c
.p
->alignment_power
)
4539 h
->root
.u
.c
.p
->alignment_power
= alignment_power
;
4544 /* Make a special call to the linker "notice" function to
4545 tell it that symbols added for crefs may need to be removed. */
4546 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_not_needed
))
4547 goto error_free_vers
;
4550 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
4552 if (nondeflt_vers
!= NULL
)
4553 free (nondeflt_vers
);
4557 if (old_tab
!= NULL
)
4559 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_needed
))
4560 goto error_free_vers
;
4565 /* Now that all the symbols from this input file are created, handle
4566 .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */
4567 if (nondeflt_vers
!= NULL
)
4569 bfd_size_type cnt
, symidx
;
4571 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
4573 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
4574 char *shortname
, *p
;
4576 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
4578 || (h
->root
.type
!= bfd_link_hash_defined
4579 && h
->root
.type
!= bfd_link_hash_defweak
))
4582 amt
= p
- h
->root
.root
.string
;
4583 shortname
= (char *) bfd_malloc (amt
+ 1);
4585 goto error_free_vers
;
4586 memcpy (shortname
, h
->root
.root
.string
, amt
);
4587 shortname
[amt
] = '\0';
4589 hi
= (struct elf_link_hash_entry
*)
4590 bfd_link_hash_lookup (&htab
->root
, shortname
,
4591 FALSE
, FALSE
, FALSE
);
4593 && hi
->root
.type
== h
->root
.type
4594 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
4595 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
4597 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
4598 hi
->root
.type
= bfd_link_hash_indirect
;
4599 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
4600 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
4601 sym_hash
= elf_sym_hashes (abfd
);
4603 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
4604 if (sym_hash
[symidx
] == hi
)
4606 sym_hash
[symidx
] = h
;
4612 free (nondeflt_vers
);
4613 nondeflt_vers
= NULL
;
4616 /* Now set the weakdefs field correctly for all the weak defined
4617 symbols we found. The only way to do this is to search all the
4618 symbols. Since we only need the information for non functions in
4619 dynamic objects, that's the only time we actually put anything on
4620 the list WEAKS. We need this information so that if a regular
4621 object refers to a symbol defined weakly in a dynamic object, the
4622 real symbol in the dynamic object is also put in the dynamic
4623 symbols; we also must arrange for both symbols to point to the
4624 same memory location. We could handle the general case of symbol
4625 aliasing, but a general symbol alias can only be generated in
4626 assembler code, handling it correctly would be very time
4627 consuming, and other ELF linkers don't handle general aliasing
4631 struct elf_link_hash_entry
**hpp
;
4632 struct elf_link_hash_entry
**hppend
;
4633 struct elf_link_hash_entry
**sorted_sym_hash
;
4634 struct elf_link_hash_entry
*h
;
4637 /* Since we have to search the whole symbol list for each weak
4638 defined symbol, search time for N weak defined symbols will be
4639 O(N^2). Binary search will cut it down to O(NlogN). */
4640 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
4641 sorted_sym_hash
= (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4642 if (sorted_sym_hash
== NULL
)
4644 sym_hash
= sorted_sym_hash
;
4645 hpp
= elf_sym_hashes (abfd
);
4646 hppend
= hpp
+ extsymcount
;
4648 for (; hpp
< hppend
; hpp
++)
4652 && h
->root
.type
== bfd_link_hash_defined
4653 && !bed
->is_function_type (h
->type
))
4661 qsort (sorted_sym_hash
, sym_count
,
4662 sizeof (struct elf_link_hash_entry
*),
4665 while (weaks
!= NULL
)
4667 struct elf_link_hash_entry
*hlook
;
4670 size_t i
, j
, idx
= 0;
4673 weaks
= hlook
->u
.weakdef
;
4674 hlook
->u
.weakdef
= NULL
;
4676 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
4677 || hlook
->root
.type
== bfd_link_hash_defweak
4678 || hlook
->root
.type
== bfd_link_hash_common
4679 || hlook
->root
.type
== bfd_link_hash_indirect
);
4680 slook
= hlook
->root
.u
.def
.section
;
4681 vlook
= hlook
->root
.u
.def
.value
;
4687 bfd_signed_vma vdiff
;
4689 h
= sorted_sym_hash
[idx
];
4690 vdiff
= vlook
- h
->root
.u
.def
.value
;
4697 long sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
4707 /* We didn't find a value/section match. */
4711 /* With multiple aliases, or when the weak symbol is already
4712 strongly defined, we have multiple matching symbols and
4713 the binary search above may land on any of them. Step
4714 one past the matching symbol(s). */
4717 h
= sorted_sym_hash
[idx
];
4718 if (h
->root
.u
.def
.section
!= slook
4719 || h
->root
.u
.def
.value
!= vlook
)
4723 /* Now look back over the aliases. Since we sorted by size
4724 as well as value and section, we'll choose the one with
4725 the largest size. */
4728 h
= sorted_sym_hash
[idx
];
4730 /* Stop if value or section doesn't match. */
4731 if (h
->root
.u
.def
.section
!= slook
4732 || h
->root
.u
.def
.value
!= vlook
)
4734 else if (h
!= hlook
)
4736 hlook
->u
.weakdef
= h
;
4738 /* If the weak definition is in the list of dynamic
4739 symbols, make sure the real definition is put
4741 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
4743 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4746 free (sorted_sym_hash
);
4751 /* If the real definition is in the list of dynamic
4752 symbols, make sure the weak definition is put
4753 there as well. If we don't do this, then the
4754 dynamic loader might not merge the entries for the
4755 real definition and the weak definition. */
4756 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
4758 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
4759 goto err_free_sym_hash
;
4766 free (sorted_sym_hash
);
4769 if (bed
->check_directives
4770 && !(*bed
->check_directives
) (abfd
, info
))
4773 /* If this object is the same format as the output object, and it is
4774 not a shared library, then let the backend look through the
4777 This is required to build global offset table entries and to
4778 arrange for dynamic relocs. It is not required for the
4779 particular common case of linking non PIC code, even when linking
4780 against shared libraries, but unfortunately there is no way of
4781 knowing whether an object file has been compiled PIC or not.
4782 Looking through the relocs is not particularly time consuming.
4783 The problem is that we must either (1) keep the relocs in memory,
4784 which causes the linker to require additional runtime memory or
4785 (2) read the relocs twice from the input file, which wastes time.
4786 This would be a good case for using mmap.
4788 I have no idea how to handle linking PIC code into a file of a
4789 different format. It probably can't be done. */
4791 && is_elf_hash_table (htab
)
4792 && bed
->check_relocs
!= NULL
4793 && elf_object_id (abfd
) == elf_hash_table_id (htab
)
4794 && (*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
4798 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4800 Elf_Internal_Rela
*internal_relocs
;
4803 if ((o
->flags
& SEC_RELOC
) == 0
4804 || o
->reloc_count
== 0
4805 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
4806 && (o
->flags
& SEC_DEBUGGING
) != 0)
4807 || bfd_is_abs_section (o
->output_section
))
4810 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
4812 if (internal_relocs
== NULL
)
4815 ok
= (*bed
->check_relocs
) (abfd
, info
, o
, internal_relocs
);
4817 if (elf_section_data (o
)->relocs
!= internal_relocs
)
4818 free (internal_relocs
);
4825 /* If this is a non-traditional link, try to optimize the handling
4826 of the .stab/.stabstr sections. */
4828 && ! info
->traditional_format
4829 && is_elf_hash_table (htab
)
4830 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
4834 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
4835 if (stabstr
!= NULL
)
4837 bfd_size_type string_offset
= 0;
4840 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
4841 if (CONST_STRNEQ (stab
->name
, ".stab")
4842 && (!stab
->name
[5] ||
4843 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
4844 && (stab
->flags
& SEC_MERGE
) == 0
4845 && !bfd_is_abs_section (stab
->output_section
))
4847 struct bfd_elf_section_data
*secdata
;
4849 secdata
= elf_section_data (stab
);
4850 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
4851 stabstr
, &secdata
->sec_info
,
4854 if (secdata
->sec_info
)
4855 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
4860 if (is_elf_hash_table (htab
) && add_needed
)
4862 /* Add this bfd to the loaded list. */
4863 struct elf_link_loaded_list
*n
;
4865 n
= (struct elf_link_loaded_list
*)
4866 bfd_alloc (abfd
, sizeof (struct elf_link_loaded_list
));
4870 n
->next
= htab
->loaded
;
4877 if (old_tab
!= NULL
)
4879 if (nondeflt_vers
!= NULL
)
4880 free (nondeflt_vers
);
4881 if (extversym
!= NULL
)
4884 if (isymbuf
!= NULL
)
4890 /* Return the linker hash table entry of a symbol that might be
4891 satisfied by an archive symbol. Return -1 on error. */
4893 struct elf_link_hash_entry
*
4894 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
4895 struct bfd_link_info
*info
,
4898 struct elf_link_hash_entry
*h
;
4902 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
4906 /* If this is a default version (the name contains @@), look up the
4907 symbol again with only one `@' as well as without the version.
4908 The effect is that references to the symbol with and without the
4909 version will be matched by the default symbol in the archive. */
4911 p
= strchr (name
, ELF_VER_CHR
);
4912 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
4915 /* First check with only one `@'. */
4916 len
= strlen (name
);
4917 copy
= (char *) bfd_alloc (abfd
, len
);
4919 return (struct elf_link_hash_entry
*) 0 - 1;
4921 first
= p
- name
+ 1;
4922 memcpy (copy
, name
, first
);
4923 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
4925 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
4928 /* We also need to check references to the symbol without the
4930 copy
[first
- 1] = '\0';
4931 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
4932 FALSE
, FALSE
, TRUE
);
4935 bfd_release (abfd
, copy
);
4939 /* Add symbols from an ELF archive file to the linker hash table. We
4940 don't use _bfd_generic_link_add_archive_symbols because of a
4941 problem which arises on UnixWare. The UnixWare libc.so is an
4942 archive which includes an entry libc.so.1 which defines a bunch of
4943 symbols. The libc.so archive also includes a number of other
4944 object files, which also define symbols, some of which are the same
4945 as those defined in libc.so.1. Correct linking requires that we
4946 consider each object file in turn, and include it if it defines any
4947 symbols we need. _bfd_generic_link_add_archive_symbols does not do
4948 this; it looks through the list of undefined symbols, and includes
4949 any object file which defines them. When this algorithm is used on
4950 UnixWare, it winds up pulling in libc.so.1 early and defining a
4951 bunch of symbols. This means that some of the other objects in the
4952 archive are not included in the link, which is incorrect since they
4953 precede libc.so.1 in the archive.
4955 Fortunately, ELF archive handling is simpler than that done by
4956 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
4957 oddities. In ELF, if we find a symbol in the archive map, and the
4958 symbol is currently undefined, we know that we must pull in that
4961 Unfortunately, we do have to make multiple passes over the symbol
4962 table until nothing further is resolved. */
4965 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
4968 bfd_boolean
*defined
= NULL
;
4969 bfd_boolean
*included
= NULL
;
4973 const struct elf_backend_data
*bed
;
4974 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
4975 (bfd
*, struct bfd_link_info
*, const char *);
4977 if (! bfd_has_map (abfd
))
4979 /* An empty archive is a special case. */
4980 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
4982 bfd_set_error (bfd_error_no_armap
);
4986 /* Keep track of all symbols we know to be already defined, and all
4987 files we know to be already included. This is to speed up the
4988 second and subsequent passes. */
4989 c
= bfd_ardata (abfd
)->symdef_count
;
4993 amt
*= sizeof (bfd_boolean
);
4994 defined
= (bfd_boolean
*) bfd_zmalloc (amt
);
4995 included
= (bfd_boolean
*) bfd_zmalloc (amt
);
4996 if (defined
== NULL
|| included
== NULL
)
4999 symdefs
= bfd_ardata (abfd
)->symdefs
;
5000 bed
= get_elf_backend_data (abfd
);
5001 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5014 symdefend
= symdef
+ c
;
5015 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5017 struct elf_link_hash_entry
*h
;
5019 struct bfd_link_hash_entry
*undefs_tail
;
5022 if (defined
[i
] || included
[i
])
5024 if (symdef
->file_offset
== last
)
5030 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5031 if (h
== (struct elf_link_hash_entry
*) 0 - 1)
5037 if (h
->root
.type
== bfd_link_hash_common
)
5039 /* We currently have a common symbol. The archive map contains
5040 a reference to this symbol, so we may want to include it. We
5041 only want to include it however, if this archive element
5042 contains a definition of the symbol, not just another common
5045 Unfortunately some archivers (including GNU ar) will put
5046 declarations of common symbols into their archive maps, as
5047 well as real definitions, so we cannot just go by the archive
5048 map alone. Instead we must read in the element's symbol
5049 table and check that to see what kind of symbol definition
5051 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5054 else if (h
->root
.type
!= bfd_link_hash_undefined
)
5056 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5061 /* We need to include this archive member. */
5062 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5063 if (element
== NULL
)
5066 if (! bfd_check_format (element
, bfd_object
))
5069 /* Doublecheck that we have not included this object
5070 already--it should be impossible, but there may be
5071 something wrong with the archive. */
5072 if (element
->archive_pass
!= 0)
5074 bfd_set_error (bfd_error_bad_value
);
5077 element
->archive_pass
= 1;
5079 undefs_tail
= info
->hash
->undefs_tail
;
5081 if (!(*info
->callbacks
5082 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5084 if (!bfd_link_add_symbols (element
, info
))
5087 /* If there are any new undefined symbols, we need to make
5088 another pass through the archive in order to see whether
5089 they can be defined. FIXME: This isn't perfect, because
5090 common symbols wind up on undefs_tail and because an
5091 undefined symbol which is defined later on in this pass
5092 does not require another pass. This isn't a bug, but it
5093 does make the code less efficient than it could be. */
5094 if (undefs_tail
!= info
->hash
->undefs_tail
)
5097 /* Look backward to mark all symbols from this object file
5098 which we have already seen in this pass. */
5102 included
[mark
] = TRUE
;
5107 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5109 /* We mark subsequent symbols from this object file as we go
5110 on through the loop. */
5111 last
= symdef
->file_offset
;
5122 if (defined
!= NULL
)
5124 if (included
!= NULL
)
5129 /* Given an ELF BFD, add symbols to the global hash table as
5133 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5135 switch (bfd_get_format (abfd
))
5138 return elf_link_add_object_symbols (abfd
, info
);
5140 return elf_link_add_archive_symbols (abfd
, info
);
5142 bfd_set_error (bfd_error_wrong_format
);
5147 struct hash_codes_info
5149 unsigned long *hashcodes
;
5153 /* This function will be called though elf_link_hash_traverse to store
5154 all hash value of the exported symbols in an array. */
5157 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5159 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5165 /* Ignore indirect symbols. These are added by the versioning code. */
5166 if (h
->dynindx
== -1)
5169 name
= h
->root
.root
.string
;
5170 p
= strchr (name
, ELF_VER_CHR
);
5173 alc
= (char *) bfd_malloc (p
- name
+ 1);
5179 memcpy (alc
, name
, p
- name
);
5180 alc
[p
- name
] = '\0';
5184 /* Compute the hash value. */
5185 ha
= bfd_elf_hash (name
);
5187 /* Store the found hash value in the array given as the argument. */
5188 *(inf
->hashcodes
)++ = ha
;
5190 /* And store it in the struct so that we can put it in the hash table
5192 h
->u
.elf_hash_value
= ha
;
5200 struct collect_gnu_hash_codes
5203 const struct elf_backend_data
*bed
;
5204 unsigned long int nsyms
;
5205 unsigned long int maskbits
;
5206 unsigned long int *hashcodes
;
5207 unsigned long int *hashval
;
5208 unsigned long int *indx
;
5209 unsigned long int *counts
;
5212 long int min_dynindx
;
5213 unsigned long int bucketcount
;
5214 unsigned long int symindx
;
5215 long int local_indx
;
5216 long int shift1
, shift2
;
5217 unsigned long int mask
;
5221 /* This function will be called though elf_link_hash_traverse to store
5222 all hash value of the exported symbols in an array. */
5225 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5227 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5233 /* Ignore indirect symbols. These are added by the versioning code. */
5234 if (h
->dynindx
== -1)
5237 /* Ignore also local symbols and undefined symbols. */
5238 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5241 name
= h
->root
.root
.string
;
5242 p
= strchr (name
, ELF_VER_CHR
);
5245 alc
= (char *) bfd_malloc (p
- name
+ 1);
5251 memcpy (alc
, name
, p
- name
);
5252 alc
[p
- name
] = '\0';
5256 /* Compute the hash value. */
5257 ha
= bfd_elf_gnu_hash (name
);
5259 /* Store the found hash value in the array for compute_bucket_count,
5260 and also for .dynsym reordering purposes. */
5261 s
->hashcodes
[s
->nsyms
] = ha
;
5262 s
->hashval
[h
->dynindx
] = ha
;
5264 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
5265 s
->min_dynindx
= h
->dynindx
;
5273 /* This function will be called though elf_link_hash_traverse to do
5274 final dynaminc symbol renumbering. */
5277 elf_renumber_gnu_hash_syms (struct elf_link_hash_entry
*h
, void *data
)
5279 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5280 unsigned long int bucket
;
5281 unsigned long int val
;
5283 /* Ignore indirect symbols. */
5284 if (h
->dynindx
== -1)
5287 /* Ignore also local symbols and undefined symbols. */
5288 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5290 if (h
->dynindx
>= s
->min_dynindx
)
5291 h
->dynindx
= s
->local_indx
++;
5295 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
5296 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
5297 & ((s
->maskbits
>> s
->shift1
) - 1);
5298 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
5300 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
5301 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
5302 if (s
->counts
[bucket
] == 1)
5303 /* Last element terminates the chain. */
5305 bfd_put_32 (s
->output_bfd
, val
,
5306 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
5307 --s
->counts
[bucket
];
5308 h
->dynindx
= s
->indx
[bucket
]++;
5312 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5315 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
5317 return !(h
->forced_local
5318 || h
->root
.type
== bfd_link_hash_undefined
5319 || h
->root
.type
== bfd_link_hash_undefweak
5320 || ((h
->root
.type
== bfd_link_hash_defined
5321 || h
->root
.type
== bfd_link_hash_defweak
)
5322 && h
->root
.u
.def
.section
->output_section
== NULL
));
5325 /* Array used to determine the number of hash table buckets to use
5326 based on the number of symbols there are. If there are fewer than
5327 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
5328 fewer than 37 we use 17 buckets, and so forth. We never use more
5329 than 32771 buckets. */
5331 static const size_t elf_buckets
[] =
5333 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
5337 /* Compute bucket count for hashing table. We do not use a static set
5338 of possible tables sizes anymore. Instead we determine for all
5339 possible reasonable sizes of the table the outcome (i.e., the
5340 number of collisions etc) and choose the best solution. The
5341 weighting functions are not too simple to allow the table to grow
5342 without bounds. Instead one of the weighting factors is the size.
5343 Therefore the result is always a good payoff between few collisions
5344 (= short chain lengths) and table size. */
5346 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5347 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
5348 unsigned long int nsyms
,
5351 size_t best_size
= 0;
5352 unsigned long int i
;
5354 /* We have a problem here. The following code to optimize the table
5355 size requires an integer type with more the 32 bits. If
5356 BFD_HOST_U_64_BIT is set we know about such a type. */
5357 #ifdef BFD_HOST_U_64_BIT
5362 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
5363 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
5364 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
5365 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
5366 unsigned long int *counts
;
5368 unsigned int no_improvement_count
= 0;
5370 /* Possible optimization parameters: if we have NSYMS symbols we say
5371 that the hashing table must at least have NSYMS/4 and at most
5373 minsize
= nsyms
/ 4;
5376 best_size
= maxsize
= nsyms
* 2;
5381 if ((best_size
& 31) == 0)
5385 /* Create array where we count the collisions in. We must use bfd_malloc
5386 since the size could be large. */
5388 amt
*= sizeof (unsigned long int);
5389 counts
= (unsigned long int *) bfd_malloc (amt
);
5393 /* Compute the "optimal" size for the hash table. The criteria is a
5394 minimal chain length. The minor criteria is (of course) the size
5396 for (i
= minsize
; i
< maxsize
; ++i
)
5398 /* Walk through the array of hashcodes and count the collisions. */
5399 BFD_HOST_U_64_BIT max
;
5400 unsigned long int j
;
5401 unsigned long int fact
;
5403 if (gnu_hash
&& (i
& 31) == 0)
5406 memset (counts
, '\0', i
* sizeof (unsigned long int));
5408 /* Determine how often each hash bucket is used. */
5409 for (j
= 0; j
< nsyms
; ++j
)
5410 ++counts
[hashcodes
[j
] % i
];
5412 /* For the weight function we need some information about the
5413 pagesize on the target. This is information need not be 100%
5414 accurate. Since this information is not available (so far) we
5415 define it here to a reasonable default value. If it is crucial
5416 to have a better value some day simply define this value. */
5417 # ifndef BFD_TARGET_PAGESIZE
5418 # define BFD_TARGET_PAGESIZE (4096)
5421 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
5423 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
5426 /* Variant 1: optimize for short chains. We add the squares
5427 of all the chain lengths (which favors many small chain
5428 over a few long chains). */
5429 for (j
= 0; j
< i
; ++j
)
5430 max
+= counts
[j
] * counts
[j
];
5432 /* This adds penalties for the overall size of the table. */
5433 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5436 /* Variant 2: Optimize a lot more for small table. Here we
5437 also add squares of the size but we also add penalties for
5438 empty slots (the +1 term). */
5439 for (j
= 0; j
< i
; ++j
)
5440 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
5442 /* The overall size of the table is considered, but not as
5443 strong as in variant 1, where it is squared. */
5444 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5448 /* Compare with current best results. */
5449 if (max
< best_chlen
)
5453 no_improvement_count
= 0;
5455 /* PR 11843: Avoid futile long searches for the best bucket size
5456 when there are a large number of symbols. */
5457 else if (++no_improvement_count
== 100)
5464 #endif /* defined (BFD_HOST_U_64_BIT) */
5466 /* This is the fallback solution if no 64bit type is available or if we
5467 are not supposed to spend much time on optimizations. We select the
5468 bucket count using a fixed set of numbers. */
5469 for (i
= 0; elf_buckets
[i
] != 0; i
++)
5471 best_size
= elf_buckets
[i
];
5472 if (nsyms
< elf_buckets
[i
+ 1])
5475 if (gnu_hash
&& best_size
< 2)
5482 /* Size any SHT_GROUP section for ld -r. */
5485 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
5489 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
5490 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
5491 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
5496 /* Set a default stack segment size. The value in INFO wins. If it
5497 is unset, LEGACY_SYMBOL's value is used, and if that symbol is
5498 undefined it is initialized. */
5501 bfd_elf_stack_segment_size (bfd
*output_bfd
,
5502 struct bfd_link_info
*info
,
5503 const char *legacy_symbol
,
5504 bfd_vma default_size
)
5506 struct elf_link_hash_entry
*h
= NULL
;
5508 /* Look for legacy symbol. */
5510 h
= elf_link_hash_lookup (elf_hash_table (info
), legacy_symbol
,
5511 FALSE
, FALSE
, FALSE
);
5512 if (h
&& (h
->root
.type
== bfd_link_hash_defined
5513 || h
->root
.type
== bfd_link_hash_defweak
)
5515 && (h
->type
== STT_NOTYPE
|| h
->type
== STT_OBJECT
))
5517 /* The symbol has no type if specified on the command line. */
5518 h
->type
= STT_OBJECT
;
5519 if (info
->stacksize
)
5520 (*_bfd_error_handler
) (_("%B: stack size specified and %s set"),
5521 output_bfd
, legacy_symbol
);
5522 else if (h
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
5523 (*_bfd_error_handler
) (_("%B: %s not absolute"),
5524 output_bfd
, legacy_symbol
);
5526 info
->stacksize
= h
->root
.u
.def
.value
;
5529 if (!info
->stacksize
)
5530 /* If the user didn't set a size, or explicitly inhibit the
5531 size, set it now. */
5532 info
->stacksize
= default_size
;
5534 /* Provide the legacy symbol, if it is referenced. */
5535 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
5536 || h
->root
.type
== bfd_link_hash_undefweak
))
5538 struct bfd_link_hash_entry
*bh
= NULL
;
5540 if (!(_bfd_generic_link_add_one_symbol
5541 (info
, output_bfd
, legacy_symbol
,
5542 BSF_GLOBAL
, bfd_abs_section_ptr
,
5543 info
->stacksize
>= 0 ? info
->stacksize
: 0,
5544 NULL
, FALSE
, get_elf_backend_data (output_bfd
)->collect
, &bh
)))
5547 h
= (struct elf_link_hash_entry
*) bh
;
5549 h
->type
= STT_OBJECT
;
5555 /* Set up the sizes and contents of the ELF dynamic sections. This is
5556 called by the ELF linker emulation before_allocation routine. We
5557 must set the sizes of the sections before the linker sets the
5558 addresses of the various sections. */
5561 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
5564 const char *filter_shlib
,
5566 const char *depaudit
,
5567 const char * const *auxiliary_filters
,
5568 struct bfd_link_info
*info
,
5569 asection
**sinterpptr
)
5571 bfd_size_type soname_indx
;
5573 const struct elf_backend_data
*bed
;
5574 struct elf_info_failed asvinfo
;
5578 soname_indx
= (bfd_size_type
) -1;
5580 if (!is_elf_hash_table (info
->hash
))
5583 bed
= get_elf_backend_data (output_bfd
);
5585 /* Any syms created from now on start with -1 in
5586 got.refcount/offset and plt.refcount/offset. */
5587 elf_hash_table (info
)->init_got_refcount
5588 = elf_hash_table (info
)->init_got_offset
;
5589 elf_hash_table (info
)->init_plt_refcount
5590 = elf_hash_table (info
)->init_plt_offset
;
5592 if (info
->relocatable
5593 && !_bfd_elf_size_group_sections (info
))
5596 /* The backend may have to create some sections regardless of whether
5597 we're dynamic or not. */
5598 if (bed
->elf_backend_always_size_sections
5599 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
5602 /* Determine any GNU_STACK segment requirements, after the backend
5603 has had a chance to set a default segment size. */
5604 if (info
->execstack
)
5605 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| PF_X
;
5606 else if (info
->noexecstack
)
5607 elf_stack_flags (output_bfd
) = PF_R
| PF_W
;
5611 asection
*notesec
= NULL
;
5614 for (inputobj
= info
->input_bfds
;
5616 inputobj
= inputobj
->link_next
)
5621 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
5623 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
5626 if (s
->flags
& SEC_CODE
)
5630 else if (bed
->default_execstack
)
5633 if (notesec
|| info
->stacksize
> 0)
5634 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| exec
;
5635 if (notesec
&& exec
&& info
->relocatable
5636 && notesec
->output_section
!= bfd_abs_section_ptr
)
5637 notesec
->output_section
->flags
|= SEC_CODE
;
5640 dynobj
= elf_hash_table (info
)->dynobj
;
5642 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5644 struct elf_info_failed eif
;
5645 struct elf_link_hash_entry
*h
;
5647 struct bfd_elf_version_tree
*t
;
5648 struct bfd_elf_version_expr
*d
;
5650 bfd_boolean all_defined
;
5652 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
5653 BFD_ASSERT (*sinterpptr
!= NULL
|| !info
->executable
);
5657 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5659 if (soname_indx
== (bfd_size_type
) -1
5660 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
5666 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
5668 info
->flags
|= DF_SYMBOLIC
;
5676 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
5678 if (indx
== (bfd_size_type
) -1)
5681 tag
= info
->new_dtags
? DT_RUNPATH
: DT_RPATH
;
5682 if (!_bfd_elf_add_dynamic_entry (info
, tag
, indx
))
5686 if (filter_shlib
!= NULL
)
5690 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5691 filter_shlib
, TRUE
);
5692 if (indx
== (bfd_size_type
) -1
5693 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
5697 if (auxiliary_filters
!= NULL
)
5699 const char * const *p
;
5701 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
5705 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5707 if (indx
== (bfd_size_type
) -1
5708 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
5717 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
5719 if (indx
== (bfd_size_type
) -1
5720 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
5724 if (depaudit
!= NULL
)
5728 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
5730 if (indx
== (bfd_size_type
) -1
5731 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
5738 /* If we are supposed to export all symbols into the dynamic symbol
5739 table (this is not the normal case), then do so. */
5740 if (info
->export_dynamic
5741 || (info
->executable
&& info
->dynamic
))
5743 elf_link_hash_traverse (elf_hash_table (info
),
5744 _bfd_elf_export_symbol
,
5750 /* Make all global versions with definition. */
5751 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5752 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5753 if (!d
->symver
&& d
->literal
)
5755 const char *verstr
, *name
;
5756 size_t namelen
, verlen
, newlen
;
5757 char *newname
, *p
, leading_char
;
5758 struct elf_link_hash_entry
*newh
;
5760 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
5762 namelen
= strlen (name
) + (leading_char
!= '\0');
5764 verlen
= strlen (verstr
);
5765 newlen
= namelen
+ verlen
+ 3;
5767 newname
= (char *) bfd_malloc (newlen
);
5768 if (newname
== NULL
)
5770 newname
[0] = leading_char
;
5771 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
5773 /* Check the hidden versioned definition. */
5774 p
= newname
+ namelen
;
5776 memcpy (p
, verstr
, verlen
+ 1);
5777 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5778 newname
, FALSE
, FALSE
,
5781 || (newh
->root
.type
!= bfd_link_hash_defined
5782 && newh
->root
.type
!= bfd_link_hash_defweak
))
5784 /* Check the default versioned definition. */
5786 memcpy (p
, verstr
, verlen
+ 1);
5787 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5788 newname
, FALSE
, FALSE
,
5793 /* Mark this version if there is a definition and it is
5794 not defined in a shared object. */
5796 && !newh
->def_dynamic
5797 && (newh
->root
.type
== bfd_link_hash_defined
5798 || newh
->root
.type
== bfd_link_hash_defweak
))
5802 /* Attach all the symbols to their version information. */
5803 asvinfo
.info
= info
;
5804 asvinfo
.failed
= FALSE
;
5806 elf_link_hash_traverse (elf_hash_table (info
),
5807 _bfd_elf_link_assign_sym_version
,
5812 if (!info
->allow_undefined_version
)
5814 /* Check if all global versions have a definition. */
5816 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5817 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5818 if (d
->literal
&& !d
->symver
&& !d
->script
)
5820 (*_bfd_error_handler
)
5821 (_("%s: undefined version: %s"),
5822 d
->pattern
, t
->name
);
5823 all_defined
= FALSE
;
5828 bfd_set_error (bfd_error_bad_value
);
5833 /* Find all symbols which were defined in a dynamic object and make
5834 the backend pick a reasonable value for them. */
5835 elf_link_hash_traverse (elf_hash_table (info
),
5836 _bfd_elf_adjust_dynamic_symbol
,
5841 /* Add some entries to the .dynamic section. We fill in some of the
5842 values later, in bfd_elf_final_link, but we must add the entries
5843 now so that we know the final size of the .dynamic section. */
5845 /* If there are initialization and/or finalization functions to
5846 call then add the corresponding DT_INIT/DT_FINI entries. */
5847 h
= (info
->init_function
5848 ? elf_link_hash_lookup (elf_hash_table (info
),
5849 info
->init_function
, FALSE
,
5856 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
5859 h
= (info
->fini_function
5860 ? elf_link_hash_lookup (elf_hash_table (info
),
5861 info
->fini_function
, FALSE
,
5868 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
5872 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
5873 if (s
!= NULL
&& s
->linker_has_input
)
5875 /* DT_PREINIT_ARRAY is not allowed in shared library. */
5876 if (! info
->executable
)
5881 for (sub
= info
->input_bfds
; sub
!= NULL
;
5882 sub
= sub
->link_next
)
5883 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
)
5884 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5885 if (elf_section_data (o
)->this_hdr
.sh_type
5886 == SHT_PREINIT_ARRAY
)
5888 (*_bfd_error_handler
)
5889 (_("%B: .preinit_array section is not allowed in DSO"),
5894 bfd_set_error (bfd_error_nonrepresentable_section
);
5898 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
5899 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
5902 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
5903 if (s
!= NULL
&& s
->linker_has_input
)
5905 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
5906 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
5909 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
5910 if (s
!= NULL
&& s
->linker_has_input
)
5912 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
5913 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
5917 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
5918 /* If .dynstr is excluded from the link, we don't want any of
5919 these tags. Strictly, we should be checking each section
5920 individually; This quick check covers for the case where
5921 someone does a /DISCARD/ : { *(*) }. */
5922 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
5924 bfd_size_type strsize
;
5926 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
5927 if ((info
->emit_hash
5928 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
5929 || (info
->emit_gnu_hash
5930 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0))
5931 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
5932 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
5933 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
5934 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
5935 bed
->s
->sizeof_sym
))
5940 /* The backend must work out the sizes of all the other dynamic
5943 && bed
->elf_backend_size_dynamic_sections
!= NULL
5944 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
5947 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
5950 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5952 unsigned long section_sym_count
;
5953 struct bfd_elf_version_tree
*verdefs
;
5956 /* Set up the version definition section. */
5957 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
5958 BFD_ASSERT (s
!= NULL
);
5960 /* We may have created additional version definitions if we are
5961 just linking a regular application. */
5962 verdefs
= info
->version_info
;
5964 /* Skip anonymous version tag. */
5965 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
5966 verdefs
= verdefs
->next
;
5968 if (verdefs
== NULL
&& !info
->create_default_symver
)
5969 s
->flags
|= SEC_EXCLUDE
;
5974 struct bfd_elf_version_tree
*t
;
5976 Elf_Internal_Verdef def
;
5977 Elf_Internal_Verdaux defaux
;
5978 struct bfd_link_hash_entry
*bh
;
5979 struct elf_link_hash_entry
*h
;
5985 /* Make space for the base version. */
5986 size
+= sizeof (Elf_External_Verdef
);
5987 size
+= sizeof (Elf_External_Verdaux
);
5990 /* Make space for the default version. */
5991 if (info
->create_default_symver
)
5993 size
+= sizeof (Elf_External_Verdef
);
5997 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
5999 struct bfd_elf_version_deps
*n
;
6001 /* Don't emit base version twice. */
6005 size
+= sizeof (Elf_External_Verdef
);
6006 size
+= sizeof (Elf_External_Verdaux
);
6009 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6010 size
+= sizeof (Elf_External_Verdaux
);
6014 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6015 if (s
->contents
== NULL
&& s
->size
!= 0)
6018 /* Fill in the version definition section. */
6022 def
.vd_version
= VER_DEF_CURRENT
;
6023 def
.vd_flags
= VER_FLG_BASE
;
6026 if (info
->create_default_symver
)
6028 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6029 def
.vd_next
= sizeof (Elf_External_Verdef
);
6033 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6034 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6035 + sizeof (Elf_External_Verdaux
));
6038 if (soname_indx
!= (bfd_size_type
) -1)
6040 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6042 def
.vd_hash
= bfd_elf_hash (soname
);
6043 defaux
.vda_name
= soname_indx
;
6050 name
= lbasename (output_bfd
->filename
);
6051 def
.vd_hash
= bfd_elf_hash (name
);
6052 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6054 if (indx
== (bfd_size_type
) -1)
6056 defaux
.vda_name
= indx
;
6058 defaux
.vda_next
= 0;
6060 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6061 (Elf_External_Verdef
*) p
);
6062 p
+= sizeof (Elf_External_Verdef
);
6063 if (info
->create_default_symver
)
6065 /* Add a symbol representing this version. */
6067 if (! (_bfd_generic_link_add_one_symbol
6068 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6070 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6072 h
= (struct elf_link_hash_entry
*) bh
;
6075 h
->type
= STT_OBJECT
;
6076 h
->verinfo
.vertree
= NULL
;
6078 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6081 /* Create a duplicate of the base version with the same
6082 aux block, but different flags. */
6085 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6087 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6088 + sizeof (Elf_External_Verdaux
));
6091 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6092 (Elf_External_Verdef
*) p
);
6093 p
+= sizeof (Elf_External_Verdef
);
6095 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6096 (Elf_External_Verdaux
*) p
);
6097 p
+= sizeof (Elf_External_Verdaux
);
6099 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6102 struct bfd_elf_version_deps
*n
;
6104 /* Don't emit the base version twice. */
6109 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6112 /* Add a symbol representing this version. */
6114 if (! (_bfd_generic_link_add_one_symbol
6115 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6117 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6119 h
= (struct elf_link_hash_entry
*) bh
;
6122 h
->type
= STT_OBJECT
;
6123 h
->verinfo
.vertree
= t
;
6125 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6128 def
.vd_version
= VER_DEF_CURRENT
;
6130 if (t
->globals
.list
== NULL
6131 && t
->locals
.list
== NULL
6133 def
.vd_flags
|= VER_FLG_WEAK
;
6134 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6135 def
.vd_cnt
= cdeps
+ 1;
6136 def
.vd_hash
= bfd_elf_hash (t
->name
);
6137 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6140 /* If a basever node is next, it *must* be the last node in
6141 the chain, otherwise Verdef construction breaks. */
6142 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6143 BFD_ASSERT (t
->next
->next
== NULL
);
6145 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6146 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6147 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6149 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6150 (Elf_External_Verdef
*) p
);
6151 p
+= sizeof (Elf_External_Verdef
);
6153 defaux
.vda_name
= h
->dynstr_index
;
6154 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6156 defaux
.vda_next
= 0;
6157 if (t
->deps
!= NULL
)
6158 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6159 t
->name_indx
= defaux
.vda_name
;
6161 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6162 (Elf_External_Verdaux
*) p
);
6163 p
+= sizeof (Elf_External_Verdaux
);
6165 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6167 if (n
->version_needed
== NULL
)
6169 /* This can happen if there was an error in the
6171 defaux
.vda_name
= 0;
6175 defaux
.vda_name
= n
->version_needed
->name_indx
;
6176 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6179 if (n
->next
== NULL
)
6180 defaux
.vda_next
= 0;
6182 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6184 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6185 (Elf_External_Verdaux
*) p
);
6186 p
+= sizeof (Elf_External_Verdaux
);
6190 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
6191 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
6194 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6197 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
6199 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
6202 else if (info
->flags
& DF_BIND_NOW
)
6204 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
6210 if (info
->executable
)
6211 info
->flags_1
&= ~ (DF_1_INITFIRST
6214 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
6218 /* Work out the size of the version reference section. */
6220 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6221 BFD_ASSERT (s
!= NULL
);
6223 struct elf_find_verdep_info sinfo
;
6226 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6227 if (sinfo
.vers
== 0)
6229 sinfo
.failed
= FALSE
;
6231 elf_link_hash_traverse (elf_hash_table (info
),
6232 _bfd_elf_link_find_version_dependencies
,
6237 if (elf_tdata (output_bfd
)->verref
== NULL
)
6238 s
->flags
|= SEC_EXCLUDE
;
6241 Elf_Internal_Verneed
*t
;
6246 /* Build the version dependency section. */
6249 for (t
= elf_tdata (output_bfd
)->verref
;
6253 Elf_Internal_Vernaux
*a
;
6255 size
+= sizeof (Elf_External_Verneed
);
6257 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6258 size
+= sizeof (Elf_External_Vernaux
);
6262 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6263 if (s
->contents
== NULL
)
6267 for (t
= elf_tdata (output_bfd
)->verref
;
6272 Elf_Internal_Vernaux
*a
;
6276 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6279 t
->vn_version
= VER_NEED_CURRENT
;
6281 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6282 elf_dt_name (t
->vn_bfd
) != NULL
6283 ? elf_dt_name (t
->vn_bfd
)
6284 : lbasename (t
->vn_bfd
->filename
),
6286 if (indx
== (bfd_size_type
) -1)
6289 t
->vn_aux
= sizeof (Elf_External_Verneed
);
6290 if (t
->vn_nextref
== NULL
)
6293 t
->vn_next
= (sizeof (Elf_External_Verneed
)
6294 + caux
* sizeof (Elf_External_Vernaux
));
6296 _bfd_elf_swap_verneed_out (output_bfd
, t
,
6297 (Elf_External_Verneed
*) p
);
6298 p
+= sizeof (Elf_External_Verneed
);
6300 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6302 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6303 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6304 a
->vna_nodename
, FALSE
);
6305 if (indx
== (bfd_size_type
) -1)
6308 if (a
->vna_nextptr
== NULL
)
6311 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6313 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6314 (Elf_External_Vernaux
*) p
);
6315 p
+= sizeof (Elf_External_Vernaux
);
6319 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
6320 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
6323 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6327 if ((elf_tdata (output_bfd
)->cverrefs
== 0
6328 && elf_tdata (output_bfd
)->cverdefs
== 0)
6329 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6330 §ion_sym_count
) == 0)
6332 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6333 s
->flags
|= SEC_EXCLUDE
;
6339 /* Find the first non-excluded output section. We'll use its
6340 section symbol for some emitted relocs. */
6342 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
6346 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6347 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
6348 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6350 elf_hash_table (info
)->text_index_section
= s
;
6355 /* Find two non-excluded output sections, one for code, one for data.
6356 We'll use their section symbols for some emitted relocs. */
6358 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
6362 /* Data first, since setting text_index_section changes
6363 _bfd_elf_link_omit_section_dynsym. */
6364 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6365 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
)) == SEC_ALLOC
)
6366 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6368 elf_hash_table (info
)->data_index_section
= s
;
6372 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6373 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
))
6374 == (SEC_ALLOC
| SEC_READONLY
))
6375 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6377 elf_hash_table (info
)->text_index_section
= s
;
6381 if (elf_hash_table (info
)->text_index_section
== NULL
)
6382 elf_hash_table (info
)->text_index_section
6383 = elf_hash_table (info
)->data_index_section
;
6387 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
6389 const struct elf_backend_data
*bed
;
6391 if (!is_elf_hash_table (info
->hash
))
6394 bed
= get_elf_backend_data (output_bfd
);
6395 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
6397 if (elf_hash_table (info
)->dynamic_sections_created
)
6401 bfd_size_type dynsymcount
;
6402 unsigned long section_sym_count
;
6403 unsigned int dtagcount
;
6405 dynobj
= elf_hash_table (info
)->dynobj
;
6407 /* Assign dynsym indicies. In a shared library we generate a
6408 section symbol for each output section, which come first.
6409 Next come all of the back-end allocated local dynamic syms,
6410 followed by the rest of the global symbols. */
6412 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6413 §ion_sym_count
);
6415 /* Work out the size of the symbol version section. */
6416 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6417 BFD_ASSERT (s
!= NULL
);
6418 if (dynsymcount
!= 0
6419 && (s
->flags
& SEC_EXCLUDE
) == 0)
6421 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
6422 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6423 if (s
->contents
== NULL
)
6426 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
6430 /* Set the size of the .dynsym and .hash sections. We counted
6431 the number of dynamic symbols in elf_link_add_object_symbols.
6432 We will build the contents of .dynsym and .hash when we build
6433 the final symbol table, because until then we do not know the
6434 correct value to give the symbols. We built the .dynstr
6435 section as we went along in elf_link_add_object_symbols. */
6436 s
= bfd_get_linker_section (dynobj
, ".dynsym");
6437 BFD_ASSERT (s
!= NULL
);
6438 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
6440 if (dynsymcount
!= 0)
6442 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6443 if (s
->contents
== NULL
)
6446 /* The first entry in .dynsym is a dummy symbol.
6447 Clear all the section syms, in case we don't output them all. */
6448 ++section_sym_count
;
6449 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
6452 elf_hash_table (info
)->bucketcount
= 0;
6454 /* Compute the size of the hashing table. As a side effect this
6455 computes the hash values for all the names we export. */
6456 if (info
->emit_hash
)
6458 unsigned long int *hashcodes
;
6459 struct hash_codes_info hashinf
;
6461 unsigned long int nsyms
;
6463 size_t hash_entry_size
;
6465 /* Compute the hash values for all exported symbols. At the same
6466 time store the values in an array so that we could use them for
6468 amt
= dynsymcount
* sizeof (unsigned long int);
6469 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
6470 if (hashcodes
== NULL
)
6472 hashinf
.hashcodes
= hashcodes
;
6473 hashinf
.error
= FALSE
;
6475 /* Put all hash values in HASHCODES. */
6476 elf_link_hash_traverse (elf_hash_table (info
),
6477 elf_collect_hash_codes
, &hashinf
);
6484 nsyms
= hashinf
.hashcodes
- hashcodes
;
6486 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
6489 if (bucketcount
== 0)
6492 elf_hash_table (info
)->bucketcount
= bucketcount
;
6494 s
= bfd_get_linker_section (dynobj
, ".hash");
6495 BFD_ASSERT (s
!= NULL
);
6496 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
6497 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
6498 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6499 if (s
->contents
== NULL
)
6502 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
6503 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
6504 s
->contents
+ hash_entry_size
);
6507 if (info
->emit_gnu_hash
)
6510 unsigned char *contents
;
6511 struct collect_gnu_hash_codes cinfo
;
6515 memset (&cinfo
, 0, sizeof (cinfo
));
6517 /* Compute the hash values for all exported symbols. At the same
6518 time store the values in an array so that we could use them for
6520 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
6521 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
6522 if (cinfo
.hashcodes
== NULL
)
6525 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
6526 cinfo
.min_dynindx
= -1;
6527 cinfo
.output_bfd
= output_bfd
;
6530 /* Put all hash values in HASHCODES. */
6531 elf_link_hash_traverse (elf_hash_table (info
),
6532 elf_collect_gnu_hash_codes
, &cinfo
);
6535 free (cinfo
.hashcodes
);
6540 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
6542 if (bucketcount
== 0)
6544 free (cinfo
.hashcodes
);
6548 s
= bfd_get_linker_section (dynobj
, ".gnu.hash");
6549 BFD_ASSERT (s
!= NULL
);
6551 if (cinfo
.nsyms
== 0)
6553 /* Empty .gnu.hash section is special. */
6554 BFD_ASSERT (cinfo
.min_dynindx
== -1);
6555 free (cinfo
.hashcodes
);
6556 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
6557 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6558 if (contents
== NULL
)
6560 s
->contents
= contents
;
6561 /* 1 empty bucket. */
6562 bfd_put_32 (output_bfd
, 1, contents
);
6563 /* SYMIDX above the special symbol 0. */
6564 bfd_put_32 (output_bfd
, 1, contents
+ 4);
6565 /* Just one word for bitmask. */
6566 bfd_put_32 (output_bfd
, 1, contents
+ 8);
6567 /* Only hash fn bloom filter. */
6568 bfd_put_32 (output_bfd
, 0, contents
+ 12);
6569 /* No hashes are valid - empty bitmask. */
6570 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
6571 /* No hashes in the only bucket. */
6572 bfd_put_32 (output_bfd
, 0,
6573 contents
+ 16 + bed
->s
->arch_size
/ 8);
6577 unsigned long int maskwords
, maskbitslog2
, x
;
6578 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
6582 while ((x
>>= 1) != 0)
6584 if (maskbitslog2
< 3)
6586 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
6587 maskbitslog2
= maskbitslog2
+ 3;
6589 maskbitslog2
= maskbitslog2
+ 2;
6590 if (bed
->s
->arch_size
== 64)
6592 if (maskbitslog2
== 5)
6598 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
6599 cinfo
.shift2
= maskbitslog2
;
6600 cinfo
.maskbits
= 1 << maskbitslog2
;
6601 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
6602 amt
= bucketcount
* sizeof (unsigned long int) * 2;
6603 amt
+= maskwords
* sizeof (bfd_vma
);
6604 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
6605 if (cinfo
.bitmask
== NULL
)
6607 free (cinfo
.hashcodes
);
6611 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
6612 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
6613 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
6614 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
6616 /* Determine how often each hash bucket is used. */
6617 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
6618 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
6619 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
6621 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
6622 if (cinfo
.counts
[i
] != 0)
6624 cinfo
.indx
[i
] = cnt
;
6625 cnt
+= cinfo
.counts
[i
];
6627 BFD_ASSERT (cnt
== dynsymcount
);
6628 cinfo
.bucketcount
= bucketcount
;
6629 cinfo
.local_indx
= cinfo
.min_dynindx
;
6631 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
6632 s
->size
+= cinfo
.maskbits
/ 8;
6633 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6634 if (contents
== NULL
)
6636 free (cinfo
.bitmask
);
6637 free (cinfo
.hashcodes
);
6641 s
->contents
= contents
;
6642 bfd_put_32 (output_bfd
, bucketcount
, contents
);
6643 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
6644 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
6645 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
6646 contents
+= 16 + cinfo
.maskbits
/ 8;
6648 for (i
= 0; i
< bucketcount
; ++i
)
6650 if (cinfo
.counts
[i
] == 0)
6651 bfd_put_32 (output_bfd
, 0, contents
);
6653 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
6657 cinfo
.contents
= contents
;
6659 /* Renumber dynamic symbols, populate .gnu.hash section. */
6660 elf_link_hash_traverse (elf_hash_table (info
),
6661 elf_renumber_gnu_hash_syms
, &cinfo
);
6663 contents
= s
->contents
+ 16;
6664 for (i
= 0; i
< maskwords
; ++i
)
6666 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
6668 contents
+= bed
->s
->arch_size
/ 8;
6671 free (cinfo
.bitmask
);
6672 free (cinfo
.hashcodes
);
6676 s
= bfd_get_linker_section (dynobj
, ".dynstr");
6677 BFD_ASSERT (s
!= NULL
);
6679 elf_finalize_dynstr (output_bfd
, info
);
6681 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6683 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
6684 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
6691 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
6694 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
6697 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
6698 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
6701 /* Finish SHF_MERGE section merging. */
6704 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
6709 if (!is_elf_hash_table (info
->hash
))
6712 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
6713 if ((ibfd
->flags
& DYNAMIC
) == 0)
6714 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6715 if ((sec
->flags
& SEC_MERGE
) != 0
6716 && !bfd_is_abs_section (sec
->output_section
))
6718 struct bfd_elf_section_data
*secdata
;
6720 secdata
= elf_section_data (sec
);
6721 if (! _bfd_add_merge_section (abfd
,
6722 &elf_hash_table (info
)->merge_info
,
6723 sec
, &secdata
->sec_info
))
6725 else if (secdata
->sec_info
)
6726 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
6729 if (elf_hash_table (info
)->merge_info
!= NULL
)
6730 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
6731 merge_sections_remove_hook
);
6735 /* Create an entry in an ELF linker hash table. */
6737 struct bfd_hash_entry
*
6738 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
6739 struct bfd_hash_table
*table
,
6742 /* Allocate the structure if it has not already been allocated by a
6746 entry
= (struct bfd_hash_entry
*)
6747 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
6752 /* Call the allocation method of the superclass. */
6753 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
6756 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
6757 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
6759 /* Set local fields. */
6762 ret
->got
= htab
->init_got_refcount
;
6763 ret
->plt
= htab
->init_plt_refcount
;
6764 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
6765 - offsetof (struct elf_link_hash_entry
, size
)));
6766 /* Assume that we have been called by a non-ELF symbol reader.
6767 This flag is then reset by the code which reads an ELF input
6768 file. This ensures that a symbol created by a non-ELF symbol
6769 reader will have the flag set correctly. */
6776 /* Copy data from an indirect symbol to its direct symbol, hiding the
6777 old indirect symbol. Also used for copying flags to a weakdef. */
6780 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
6781 struct elf_link_hash_entry
*dir
,
6782 struct elf_link_hash_entry
*ind
)
6784 struct elf_link_hash_table
*htab
;
6786 /* Copy down any references that we may have already seen to the
6787 symbol which just became indirect. */
6789 dir
->ref_dynamic
|= ind
->ref_dynamic
;
6790 dir
->ref_regular
|= ind
->ref_regular
;
6791 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
6792 dir
->non_got_ref
|= ind
->non_got_ref
;
6793 dir
->needs_plt
|= ind
->needs_plt
;
6794 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
6796 if (ind
->root
.type
!= bfd_link_hash_indirect
)
6799 /* Copy over the global and procedure linkage table refcount entries.
6800 These may have been already set up by a check_relocs routine. */
6801 htab
= elf_hash_table (info
);
6802 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
6804 if (dir
->got
.refcount
< 0)
6805 dir
->got
.refcount
= 0;
6806 dir
->got
.refcount
+= ind
->got
.refcount
;
6807 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
6810 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
6812 if (dir
->plt
.refcount
< 0)
6813 dir
->plt
.refcount
= 0;
6814 dir
->plt
.refcount
+= ind
->plt
.refcount
;
6815 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
6818 if (ind
->dynindx
!= -1)
6820 if (dir
->dynindx
!= -1)
6821 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
6822 dir
->dynindx
= ind
->dynindx
;
6823 dir
->dynstr_index
= ind
->dynstr_index
;
6825 ind
->dynstr_index
= 0;
6830 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
6831 struct elf_link_hash_entry
*h
,
6832 bfd_boolean force_local
)
6834 /* STT_GNU_IFUNC symbol must go through PLT. */
6835 if (h
->type
!= STT_GNU_IFUNC
)
6837 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
6842 h
->forced_local
= 1;
6843 if (h
->dynindx
!= -1)
6846 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
6852 /* Initialize an ELF linker hash table. *TABLE has been zeroed by our
6856 _bfd_elf_link_hash_table_init
6857 (struct elf_link_hash_table
*table
,
6859 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
6860 struct bfd_hash_table
*,
6862 unsigned int entsize
,
6863 enum elf_target_id target_id
)
6866 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
6868 table
->init_got_refcount
.refcount
= can_refcount
- 1;
6869 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
6870 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
6871 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
6872 /* The first dynamic symbol is a dummy. */
6873 table
->dynsymcount
= 1;
6875 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
6877 table
->root
.type
= bfd_link_elf_hash_table
;
6878 table
->hash_table_id
= target_id
;
6883 /* Create an ELF linker hash table. */
6885 struct bfd_link_hash_table
*
6886 _bfd_elf_link_hash_table_create (bfd
*abfd
)
6888 struct elf_link_hash_table
*ret
;
6889 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
6891 ret
= (struct elf_link_hash_table
*) bfd_zmalloc (amt
);
6895 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
6896 sizeof (struct elf_link_hash_entry
),
6906 /* Destroy an ELF linker hash table. */
6909 _bfd_elf_link_hash_table_free (struct bfd_link_hash_table
*hash
)
6911 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) hash
;
6912 if (htab
->dynstr
!= NULL
)
6913 _bfd_elf_strtab_free (htab
->dynstr
);
6914 _bfd_merge_sections_free (htab
->merge_info
);
6915 _bfd_generic_link_hash_table_free (hash
);
6918 /* This is a hook for the ELF emulation code in the generic linker to
6919 tell the backend linker what file name to use for the DT_NEEDED
6920 entry for a dynamic object. */
6923 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
6925 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6926 && bfd_get_format (abfd
) == bfd_object
)
6927 elf_dt_name (abfd
) = name
;
6931 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
6934 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6935 && bfd_get_format (abfd
) == bfd_object
)
6936 lib_class
= elf_dyn_lib_class (abfd
);
6943 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
6945 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6946 && bfd_get_format (abfd
) == bfd_object
)
6947 elf_dyn_lib_class (abfd
) = lib_class
;
6950 /* Get the list of DT_NEEDED entries for a link. This is a hook for
6951 the linker ELF emulation code. */
6953 struct bfd_link_needed_list
*
6954 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6955 struct bfd_link_info
*info
)
6957 if (! is_elf_hash_table (info
->hash
))
6959 return elf_hash_table (info
)->needed
;
6962 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
6963 hook for the linker ELF emulation code. */
6965 struct bfd_link_needed_list
*
6966 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6967 struct bfd_link_info
*info
)
6969 if (! is_elf_hash_table (info
->hash
))
6971 return elf_hash_table (info
)->runpath
;
6974 /* Get the name actually used for a dynamic object for a link. This
6975 is the SONAME entry if there is one. Otherwise, it is the string
6976 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
6979 bfd_elf_get_dt_soname (bfd
*abfd
)
6981 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6982 && bfd_get_format (abfd
) == bfd_object
)
6983 return elf_dt_name (abfd
);
6987 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
6988 the ELF linker emulation code. */
6991 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
6992 struct bfd_link_needed_list
**pneeded
)
6995 bfd_byte
*dynbuf
= NULL
;
6996 unsigned int elfsec
;
6997 unsigned long shlink
;
6998 bfd_byte
*extdyn
, *extdynend
;
7000 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
7004 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
7005 || bfd_get_format (abfd
) != bfd_object
)
7008 s
= bfd_get_section_by_name (abfd
, ".dynamic");
7009 if (s
== NULL
|| s
->size
== 0)
7012 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
7015 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
7016 if (elfsec
== SHN_BAD
)
7019 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
7021 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
7022 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
7025 extdynend
= extdyn
+ s
->size
;
7026 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
7028 Elf_Internal_Dyn dyn
;
7030 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
7032 if (dyn
.d_tag
== DT_NULL
)
7035 if (dyn
.d_tag
== DT_NEEDED
)
7038 struct bfd_link_needed_list
*l
;
7039 unsigned int tagv
= dyn
.d_un
.d_val
;
7042 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
7047 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
7068 struct elf_symbuf_symbol
7070 unsigned long st_name
; /* Symbol name, index in string tbl */
7071 unsigned char st_info
; /* Type and binding attributes */
7072 unsigned char st_other
; /* Visibilty, and target specific */
7075 struct elf_symbuf_head
7077 struct elf_symbuf_symbol
*ssym
;
7078 bfd_size_type count
;
7079 unsigned int st_shndx
;
7086 Elf_Internal_Sym
*isym
;
7087 struct elf_symbuf_symbol
*ssym
;
7092 /* Sort references to symbols by ascending section number. */
7095 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7097 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
7098 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
7100 return s1
->st_shndx
- s2
->st_shndx
;
7104 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7106 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7107 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7108 return strcmp (s1
->name
, s2
->name
);
7111 static struct elf_symbuf_head
*
7112 elf_create_symbuf (bfd_size_type symcount
, Elf_Internal_Sym
*isymbuf
)
7114 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
7115 struct elf_symbuf_symbol
*ssym
;
7116 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
7117 bfd_size_type i
, shndx_count
, total_size
;
7119 indbuf
= (Elf_Internal_Sym
**) bfd_malloc2 (symcount
, sizeof (*indbuf
));
7123 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
7124 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
)
7125 *ind
++ = &isymbuf
[i
];
7128 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
7129 elf_sort_elf_symbol
);
7132 if (indbufend
> indbuf
)
7133 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
7134 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
7137 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
7138 + (indbufend
- indbuf
) * sizeof (*ssym
));
7139 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
7140 if (ssymbuf
== NULL
)
7146 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
7147 ssymbuf
->ssym
= NULL
;
7148 ssymbuf
->count
= shndx_count
;
7149 ssymbuf
->st_shndx
= 0;
7150 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
7152 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
7155 ssymhead
->ssym
= ssym
;
7156 ssymhead
->count
= 0;
7157 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
7159 ssym
->st_name
= (*ind
)->st_name
;
7160 ssym
->st_info
= (*ind
)->st_info
;
7161 ssym
->st_other
= (*ind
)->st_other
;
7164 BFD_ASSERT ((bfd_size_type
) (ssymhead
- ssymbuf
) == shndx_count
7165 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
7172 /* Check if 2 sections define the same set of local and global
7176 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
7177 struct bfd_link_info
*info
)
7180 const struct elf_backend_data
*bed1
, *bed2
;
7181 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7182 bfd_size_type symcount1
, symcount2
;
7183 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7184 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
7185 Elf_Internal_Sym
*isym
, *isymend
;
7186 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
7187 bfd_size_type count1
, count2
, i
;
7188 unsigned int shndx1
, shndx2
;
7194 /* Both sections have to be in ELF. */
7195 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7196 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7199 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7202 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7203 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7204 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
7207 bed1
= get_elf_backend_data (bfd1
);
7208 bed2
= get_elf_backend_data (bfd2
);
7209 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7210 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7211 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7212 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7214 if (symcount1
== 0 || symcount2
== 0)
7220 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
7221 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
7223 if (ssymbuf1
== NULL
)
7225 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7227 if (isymbuf1
== NULL
)
7230 if (!info
->reduce_memory_overheads
)
7231 elf_tdata (bfd1
)->symbuf
= ssymbuf1
7232 = elf_create_symbuf (symcount1
, isymbuf1
);
7235 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
7237 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7239 if (isymbuf2
== NULL
)
7242 if (ssymbuf1
!= NULL
&& !info
->reduce_memory_overheads
)
7243 elf_tdata (bfd2
)->symbuf
= ssymbuf2
7244 = elf_create_symbuf (symcount2
, isymbuf2
);
7247 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
7249 /* Optimized faster version. */
7250 bfd_size_type lo
, hi
, mid
;
7251 struct elf_symbol
*symp
;
7252 struct elf_symbuf_symbol
*ssym
, *ssymend
;
7255 hi
= ssymbuf1
->count
;
7260 mid
= (lo
+ hi
) / 2;
7261 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
7263 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
7267 count1
= ssymbuf1
[mid
].count
;
7274 hi
= ssymbuf2
->count
;
7279 mid
= (lo
+ hi
) / 2;
7280 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
7282 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
7286 count2
= ssymbuf2
[mid
].count
;
7292 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7295 symtable1
= (struct elf_symbol
*)
7296 bfd_malloc (count1
* sizeof (struct elf_symbol
));
7297 symtable2
= (struct elf_symbol
*)
7298 bfd_malloc (count2
* sizeof (struct elf_symbol
));
7299 if (symtable1
== NULL
|| symtable2
== NULL
)
7303 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
7304 ssym
< ssymend
; ssym
++, symp
++)
7306 symp
->u
.ssym
= ssym
;
7307 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
7313 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
7314 ssym
< ssymend
; ssym
++, symp
++)
7316 symp
->u
.ssym
= ssym
;
7317 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
7322 /* Sort symbol by name. */
7323 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7324 elf_sym_name_compare
);
7325 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7326 elf_sym_name_compare
);
7328 for (i
= 0; i
< count1
; i
++)
7329 /* Two symbols must have the same binding, type and name. */
7330 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
7331 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
7332 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7339 symtable1
= (struct elf_symbol
*)
7340 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
7341 symtable2
= (struct elf_symbol
*)
7342 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
7343 if (symtable1
== NULL
|| symtable2
== NULL
)
7346 /* Count definitions in the section. */
7348 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
7349 if (isym
->st_shndx
== shndx1
)
7350 symtable1
[count1
++].u
.isym
= isym
;
7353 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
7354 if (isym
->st_shndx
== shndx2
)
7355 symtable2
[count2
++].u
.isym
= isym
;
7357 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7360 for (i
= 0; i
< count1
; i
++)
7362 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
7363 symtable1
[i
].u
.isym
->st_name
);
7365 for (i
= 0; i
< count2
; i
++)
7367 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
7368 symtable2
[i
].u
.isym
->st_name
);
7370 /* Sort symbol by name. */
7371 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7372 elf_sym_name_compare
);
7373 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7374 elf_sym_name_compare
);
7376 for (i
= 0; i
< count1
; i
++)
7377 /* Two symbols must have the same binding, type and name. */
7378 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
7379 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
7380 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7398 /* Return TRUE if 2 section types are compatible. */
7401 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
7402 bfd
*bbfd
, const asection
*bsec
)
7406 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
7407 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7410 return elf_section_type (asec
) == elf_section_type (bsec
);
7413 /* Final phase of ELF linker. */
7415 /* A structure we use to avoid passing large numbers of arguments. */
7417 struct elf_final_link_info
7419 /* General link information. */
7420 struct bfd_link_info
*info
;
7423 /* Symbol string table. */
7424 struct bfd_strtab_hash
*symstrtab
;
7425 /* .dynsym section. */
7426 asection
*dynsym_sec
;
7427 /* .hash section. */
7429 /* symbol version section (.gnu.version). */
7430 asection
*symver_sec
;
7431 /* Buffer large enough to hold contents of any section. */
7433 /* Buffer large enough to hold external relocs of any section. */
7434 void *external_relocs
;
7435 /* Buffer large enough to hold internal relocs of any section. */
7436 Elf_Internal_Rela
*internal_relocs
;
7437 /* Buffer large enough to hold external local symbols of any input
7439 bfd_byte
*external_syms
;
7440 /* And a buffer for symbol section indices. */
7441 Elf_External_Sym_Shndx
*locsym_shndx
;
7442 /* Buffer large enough to hold internal local symbols of any input
7444 Elf_Internal_Sym
*internal_syms
;
7445 /* Array large enough to hold a symbol index for each local symbol
7446 of any input BFD. */
7448 /* Array large enough to hold a section pointer for each local
7449 symbol of any input BFD. */
7450 asection
**sections
;
7451 /* Buffer to hold swapped out symbols. */
7453 /* And one for symbol section indices. */
7454 Elf_External_Sym_Shndx
*symshndxbuf
;
7455 /* Number of swapped out symbols in buffer. */
7456 size_t symbuf_count
;
7457 /* Number of symbols which fit in symbuf. */
7459 /* And same for symshndxbuf. */
7460 size_t shndxbuf_size
;
7461 /* Number of STT_FILE syms seen. */
7462 size_t filesym_count
;
7465 /* This struct is used to pass information to elf_link_output_extsym. */
7467 struct elf_outext_info
7470 bfd_boolean localsyms
;
7471 bfd_boolean need_second_pass
;
7472 bfd_boolean second_pass
;
7473 bfd_boolean file_sym_done
;
7474 struct elf_final_link_info
*flinfo
;
7478 /* Support for evaluating a complex relocation.
7480 Complex relocations are generalized, self-describing relocations. The
7481 implementation of them consists of two parts: complex symbols, and the
7482 relocations themselves.
7484 The relocations are use a reserved elf-wide relocation type code (R_RELC
7485 external / BFD_RELOC_RELC internal) and an encoding of relocation field
7486 information (start bit, end bit, word width, etc) into the addend. This
7487 information is extracted from CGEN-generated operand tables within gas.
7489 Complex symbols are mangled symbols (BSF_RELC external / STT_RELC
7490 internal) representing prefix-notation expressions, including but not
7491 limited to those sorts of expressions normally encoded as addends in the
7492 addend field. The symbol mangling format is:
7495 | <unary-operator> ':' <node>
7496 | <binary-operator> ':' <node> ':' <node>
7499 <literal> := 's' <digits=N> ':' <N character symbol name>
7500 | 'S' <digits=N> ':' <N character section name>
7504 <binary-operator> := as in C
7505 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
7508 set_symbol_value (bfd
*bfd_with_globals
,
7509 Elf_Internal_Sym
*isymbuf
,
7514 struct elf_link_hash_entry
**sym_hashes
;
7515 struct elf_link_hash_entry
*h
;
7516 size_t extsymoff
= locsymcount
;
7518 if (symidx
< locsymcount
)
7520 Elf_Internal_Sym
*sym
;
7522 sym
= isymbuf
+ symidx
;
7523 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
7525 /* It is a local symbol: move it to the
7526 "absolute" section and give it a value. */
7527 sym
->st_shndx
= SHN_ABS
;
7528 sym
->st_value
= val
;
7531 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
7535 /* It is a global symbol: set its link type
7536 to "defined" and give it a value. */
7538 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
7539 h
= sym_hashes
[symidx
- extsymoff
];
7540 while (h
->root
.type
== bfd_link_hash_indirect
7541 || h
->root
.type
== bfd_link_hash_warning
)
7542 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7543 h
->root
.type
= bfd_link_hash_defined
;
7544 h
->root
.u
.def
.value
= val
;
7545 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
7549 resolve_symbol (const char *name
,
7551 struct elf_final_link_info
*flinfo
,
7553 Elf_Internal_Sym
*isymbuf
,
7556 Elf_Internal_Sym
*sym
;
7557 struct bfd_link_hash_entry
*global_entry
;
7558 const char *candidate
= NULL
;
7559 Elf_Internal_Shdr
*symtab_hdr
;
7562 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
7564 for (i
= 0; i
< locsymcount
; ++ i
)
7568 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
7571 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
7572 symtab_hdr
->sh_link
,
7575 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
7576 name
, candidate
, (unsigned long) sym
->st_value
);
7578 if (candidate
&& strcmp (candidate
, name
) == 0)
7580 asection
*sec
= flinfo
->sections
[i
];
7582 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
7583 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
7585 printf ("Found symbol with value %8.8lx\n",
7586 (unsigned long) *result
);
7592 /* Hmm, haven't found it yet. perhaps it is a global. */
7593 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
7594 FALSE
, FALSE
, TRUE
);
7598 if (global_entry
->type
== bfd_link_hash_defined
7599 || global_entry
->type
== bfd_link_hash_defweak
)
7601 *result
= (global_entry
->u
.def
.value
7602 + global_entry
->u
.def
.section
->output_section
->vma
7603 + global_entry
->u
.def
.section
->output_offset
);
7605 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
7606 global_entry
->root
.string
, (unsigned long) *result
);
7615 resolve_section (const char *name
,
7622 for (curr
= sections
; curr
; curr
= curr
->next
)
7623 if (strcmp (curr
->name
, name
) == 0)
7625 *result
= curr
->vma
;
7629 /* Hmm. still haven't found it. try pseudo-section names. */
7630 for (curr
= sections
; curr
; curr
= curr
->next
)
7632 len
= strlen (curr
->name
);
7633 if (len
> strlen (name
))
7636 if (strncmp (curr
->name
, name
, len
) == 0)
7638 if (strncmp (".end", name
+ len
, 4) == 0)
7640 *result
= curr
->vma
+ curr
->size
;
7644 /* Insert more pseudo-section names here, if you like. */
7652 undefined_reference (const char *reftype
, const char *name
)
7654 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
7659 eval_symbol (bfd_vma
*result
,
7662 struct elf_final_link_info
*flinfo
,
7664 Elf_Internal_Sym
*isymbuf
,
7673 const char *sym
= *symp
;
7675 bfd_boolean symbol_is_section
= FALSE
;
7680 if (len
< 1 || len
> sizeof (symbuf
))
7682 bfd_set_error (bfd_error_invalid_operation
);
7695 *result
= strtoul (sym
, (char **) symp
, 16);
7699 symbol_is_section
= TRUE
;
7702 symlen
= strtol (sym
, (char **) symp
, 10);
7703 sym
= *symp
+ 1; /* Skip the trailing ':'. */
7705 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
7707 bfd_set_error (bfd_error_invalid_operation
);
7711 memcpy (symbuf
, sym
, symlen
);
7712 symbuf
[symlen
] = '\0';
7713 *symp
= sym
+ symlen
;
7715 /* Is it always possible, with complex symbols, that gas "mis-guessed"
7716 the symbol as a section, or vice-versa. so we're pretty liberal in our
7717 interpretation here; section means "try section first", not "must be a
7718 section", and likewise with symbol. */
7720 if (symbol_is_section
)
7722 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
)
7723 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7724 isymbuf
, locsymcount
))
7726 undefined_reference ("section", symbuf
);
7732 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7733 isymbuf
, locsymcount
)
7734 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
7737 undefined_reference ("symbol", symbuf
);
7744 /* All that remains are operators. */
7746 #define UNARY_OP(op) \
7747 if (strncmp (sym, #op, strlen (#op)) == 0) \
7749 sym += strlen (#op); \
7753 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7754 isymbuf, locsymcount, signed_p)) \
7757 *result = op ((bfd_signed_vma) a); \
7763 #define BINARY_OP(op) \
7764 if (strncmp (sym, #op, strlen (#op)) == 0) \
7766 sym += strlen (#op); \
7770 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7771 isymbuf, locsymcount, signed_p)) \
7774 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
7775 isymbuf, locsymcount, signed_p)) \
7778 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
7808 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
7809 bfd_set_error (bfd_error_invalid_operation
);
7815 put_value (bfd_vma size
,
7816 unsigned long chunksz
,
7821 location
+= (size
- chunksz
);
7823 for (; size
; size
-= chunksz
, location
-= chunksz
, x
>>= (chunksz
* 8))
7831 bfd_put_8 (input_bfd
, x
, location
);
7834 bfd_put_16 (input_bfd
, x
, location
);
7837 bfd_put_32 (input_bfd
, x
, location
);
7841 bfd_put_64 (input_bfd
, x
, location
);
7851 get_value (bfd_vma size
,
7852 unsigned long chunksz
,
7859 /* Sanity checks. */
7860 BFD_ASSERT (chunksz
<= sizeof (x
)
7863 && (size
% chunksz
) == 0
7864 && input_bfd
!= NULL
7865 && location
!= NULL
);
7867 if (chunksz
== sizeof (x
))
7869 BFD_ASSERT (size
== chunksz
);
7871 /* Make sure that we do not perform an undefined shift operation.
7872 We know that size == chunksz so there will only be one iteration
7873 of the loop below. */
7877 shift
= 8 * chunksz
;
7879 for (; size
; size
-= chunksz
, location
+= chunksz
)
7884 x
= (x
<< shift
) | bfd_get_8 (input_bfd
, location
);
7887 x
= (x
<< shift
) | bfd_get_16 (input_bfd
, location
);
7890 x
= (x
<< shift
) | bfd_get_32 (input_bfd
, location
);
7894 x
= (x
<< shift
) | bfd_get_64 (input_bfd
, location
);
7905 decode_complex_addend (unsigned long *start
, /* in bits */
7906 unsigned long *oplen
, /* in bits */
7907 unsigned long *len
, /* in bits */
7908 unsigned long *wordsz
, /* in bytes */
7909 unsigned long *chunksz
, /* in bytes */
7910 unsigned long *lsb0_p
,
7911 unsigned long *signed_p
,
7912 unsigned long *trunc_p
,
7913 unsigned long encoded
)
7915 * start
= encoded
& 0x3F;
7916 * len
= (encoded
>> 6) & 0x3F;
7917 * oplen
= (encoded
>> 12) & 0x3F;
7918 * wordsz
= (encoded
>> 18) & 0xF;
7919 * chunksz
= (encoded
>> 22) & 0xF;
7920 * lsb0_p
= (encoded
>> 27) & 1;
7921 * signed_p
= (encoded
>> 28) & 1;
7922 * trunc_p
= (encoded
>> 29) & 1;
7925 bfd_reloc_status_type
7926 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
7927 asection
*input_section ATTRIBUTE_UNUSED
,
7929 Elf_Internal_Rela
*rel
,
7932 bfd_vma shift
, x
, mask
;
7933 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
7934 bfd_reloc_status_type r
;
7936 /* Perform this reloc, since it is complex.
7937 (this is not to say that it necessarily refers to a complex
7938 symbol; merely that it is a self-describing CGEN based reloc.
7939 i.e. the addend has the complete reloc information (bit start, end,
7940 word size, etc) encoded within it.). */
7942 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
7943 &chunksz
, &lsb0_p
, &signed_p
,
7944 &trunc_p
, rel
->r_addend
);
7946 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
7949 shift
= (start
+ 1) - len
;
7951 shift
= (8 * wordsz
) - (start
+ len
);
7953 /* FIXME: octets_per_byte. */
7954 x
= get_value (wordsz
, chunksz
, input_bfd
, contents
+ rel
->r_offset
);
7957 printf ("Doing complex reloc: "
7958 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
7959 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
7960 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
7961 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
7962 oplen
, (unsigned long) x
, (unsigned long) mask
,
7963 (unsigned long) relocation
);
7968 /* Now do an overflow check. */
7969 r
= bfd_check_overflow ((signed_p
7970 ? complain_overflow_signed
7971 : complain_overflow_unsigned
),
7972 len
, 0, (8 * wordsz
),
7976 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
7979 printf (" relocation: %8.8lx\n"
7980 " shifted mask: %8.8lx\n"
7981 " shifted/masked reloc: %8.8lx\n"
7982 " result: %8.8lx\n",
7983 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
7984 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
7986 /* FIXME: octets_per_byte. */
7987 put_value (wordsz
, chunksz
, input_bfd
, x
, contents
+ rel
->r_offset
);
7991 /* When performing a relocatable link, the input relocations are
7992 preserved. But, if they reference global symbols, the indices
7993 referenced must be updated. Update all the relocations found in
7997 elf_link_adjust_relocs (bfd
*abfd
,
7998 struct bfd_elf_section_reloc_data
*reldata
)
8001 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8003 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8004 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8005 bfd_vma r_type_mask
;
8007 unsigned int count
= reldata
->count
;
8008 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
8010 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
8012 swap_in
= bed
->s
->swap_reloc_in
;
8013 swap_out
= bed
->s
->swap_reloc_out
;
8015 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
8017 swap_in
= bed
->s
->swap_reloca_in
;
8018 swap_out
= bed
->s
->swap_reloca_out
;
8023 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
8026 if (bed
->s
->arch_size
== 32)
8033 r_type_mask
= 0xffffffff;
8037 erela
= reldata
->hdr
->contents
;
8038 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
8040 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
8043 if (*rel_hash
== NULL
)
8046 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
8048 (*swap_in
) (abfd
, erela
, irela
);
8049 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
8050 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
8051 | (irela
[j
].r_info
& r_type_mask
));
8052 (*swap_out
) (abfd
, irela
, erela
);
8056 struct elf_link_sort_rela
8062 enum elf_reloc_type_class type
;
8063 /* We use this as an array of size int_rels_per_ext_rel. */
8064 Elf_Internal_Rela rela
[1];
8068 elf_link_sort_cmp1 (const void *A
, const void *B
)
8070 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8071 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8072 int relativea
, relativeb
;
8074 relativea
= a
->type
== reloc_class_relative
;
8075 relativeb
= b
->type
== reloc_class_relative
;
8077 if (relativea
< relativeb
)
8079 if (relativea
> relativeb
)
8081 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
8083 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
8085 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8087 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8093 elf_link_sort_cmp2 (const void *A
, const void *B
)
8095 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8096 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8098 if (a
->type
< b
->type
)
8100 if (a
->type
> b
->type
)
8102 if (a
->u
.offset
< b
->u
.offset
)
8104 if (a
->u
.offset
> b
->u
.offset
)
8106 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8108 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8114 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
8116 asection
*dynamic_relocs
;
8119 bfd_size_type count
, size
;
8120 size_t i
, ret
, sort_elt
, ext_size
;
8121 bfd_byte
*sort
, *s_non_relative
, *p
;
8122 struct elf_link_sort_rela
*sq
;
8123 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8124 int i2e
= bed
->s
->int_rels_per_ext_rel
;
8125 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8126 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8127 struct bfd_link_order
*lo
;
8129 bfd_boolean use_rela
;
8131 /* Find a dynamic reloc section. */
8132 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
8133 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
8134 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
8135 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8137 bfd_boolean use_rela_initialised
= FALSE
;
8139 /* This is just here to stop gcc from complaining.
8140 It's initialization checking code is not perfect. */
8143 /* Both sections are present. Examine the sizes
8144 of the indirect sections to help us choose. */
8145 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8146 if (lo
->type
== bfd_indirect_link_order
)
8148 asection
*o
= lo
->u
.indirect
.section
;
8150 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8152 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8153 /* Section size is divisible by both rel and rela sizes.
8154 It is of no help to us. */
8158 /* Section size is only divisible by rela. */
8159 if (use_rela_initialised
&& (use_rela
== FALSE
))
8162 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8163 bfd_set_error (bfd_error_invalid_operation
);
8169 use_rela_initialised
= TRUE
;
8173 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8175 /* Section size is only divisible by rel. */
8176 if (use_rela_initialised
&& (use_rela
== TRUE
))
8179 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8180 bfd_set_error (bfd_error_invalid_operation
);
8186 use_rela_initialised
= TRUE
;
8191 /* The section size is not divisible by either - something is wrong. */
8193 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8194 bfd_set_error (bfd_error_invalid_operation
);
8199 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8200 if (lo
->type
== bfd_indirect_link_order
)
8202 asection
*o
= lo
->u
.indirect
.section
;
8204 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8206 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8207 /* Section size is divisible by both rel and rela sizes.
8208 It is of no help to us. */
8212 /* Section size is only divisible by rela. */
8213 if (use_rela_initialised
&& (use_rela
== FALSE
))
8216 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8217 bfd_set_error (bfd_error_invalid_operation
);
8223 use_rela_initialised
= TRUE
;
8227 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8229 /* Section size is only divisible by rel. */
8230 if (use_rela_initialised
&& (use_rela
== TRUE
))
8233 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8234 bfd_set_error (bfd_error_invalid_operation
);
8240 use_rela_initialised
= TRUE
;
8245 /* The section size is not divisible by either - something is wrong. */
8247 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8248 bfd_set_error (bfd_error_invalid_operation
);
8253 if (! use_rela_initialised
)
8257 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
8259 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8266 dynamic_relocs
= rela_dyn
;
8267 ext_size
= bed
->s
->sizeof_rela
;
8268 swap_in
= bed
->s
->swap_reloca_in
;
8269 swap_out
= bed
->s
->swap_reloca_out
;
8273 dynamic_relocs
= rel_dyn
;
8274 ext_size
= bed
->s
->sizeof_rel
;
8275 swap_in
= bed
->s
->swap_reloc_in
;
8276 swap_out
= bed
->s
->swap_reloc_out
;
8280 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8281 if (lo
->type
== bfd_indirect_link_order
)
8282 size
+= lo
->u
.indirect
.section
->size
;
8284 if (size
!= dynamic_relocs
->size
)
8287 sort_elt
= (sizeof (struct elf_link_sort_rela
)
8288 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
8290 count
= dynamic_relocs
->size
/ ext_size
;
8293 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
8297 (*info
->callbacks
->warning
)
8298 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0, 0);
8302 if (bed
->s
->arch_size
== 32)
8303 r_sym_mask
= ~(bfd_vma
) 0xff;
8305 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
8307 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8308 if (lo
->type
== bfd_indirect_link_order
)
8310 bfd_byte
*erel
, *erelend
;
8311 asection
*o
= lo
->u
.indirect
.section
;
8313 if (o
->contents
== NULL
&& o
->size
!= 0)
8315 /* This is a reloc section that is being handled as a normal
8316 section. See bfd_section_from_shdr. We can't combine
8317 relocs in this case. */
8322 erelend
= o
->contents
+ o
->size
;
8323 /* FIXME: octets_per_byte. */
8324 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8326 while (erel
< erelend
)
8328 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8330 (*swap_in
) (abfd
, erel
, s
->rela
);
8331 s
->type
= (*bed
->elf_backend_reloc_type_class
) (info
, o
, s
->rela
);
8332 s
->u
.sym_mask
= r_sym_mask
;
8338 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
8340 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
8342 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8343 if (s
->type
!= reloc_class_relative
)
8349 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
8350 for (; i
< count
; i
++, p
+= sort_elt
)
8352 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
8353 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
8355 sp
->u
.offset
= sq
->rela
->r_offset
;
8358 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
8360 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8361 if (lo
->type
== bfd_indirect_link_order
)
8363 bfd_byte
*erel
, *erelend
;
8364 asection
*o
= lo
->u
.indirect
.section
;
8367 erelend
= o
->contents
+ o
->size
;
8368 /* FIXME: octets_per_byte. */
8369 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8370 while (erel
< erelend
)
8372 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8373 (*swap_out
) (abfd
, s
->rela
, erel
);
8380 *psec
= dynamic_relocs
;
8384 /* Flush the output symbols to the file. */
8387 elf_link_flush_output_syms (struct elf_final_link_info
*flinfo
,
8388 const struct elf_backend_data
*bed
)
8390 if (flinfo
->symbuf_count
> 0)
8392 Elf_Internal_Shdr
*hdr
;
8396 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
8397 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
8398 amt
= flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8399 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) != 0
8400 || bfd_bwrite (flinfo
->symbuf
, amt
, flinfo
->output_bfd
) != amt
)
8403 hdr
->sh_size
+= amt
;
8404 flinfo
->symbuf_count
= 0;
8410 /* Add a symbol to the output symbol table. */
8413 elf_link_output_sym (struct elf_final_link_info
*flinfo
,
8415 Elf_Internal_Sym
*elfsym
,
8416 asection
*input_sec
,
8417 struct elf_link_hash_entry
*h
)
8420 Elf_External_Sym_Shndx
*destshndx
;
8421 int (*output_symbol_hook
)
8422 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
8423 struct elf_link_hash_entry
*);
8424 const struct elf_backend_data
*bed
;
8426 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8427 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
8428 if (output_symbol_hook
!= NULL
)
8430 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
8435 if (name
== NULL
|| *name
== '\0')
8436 elfsym
->st_name
= 0;
8437 else if (input_sec
->flags
& SEC_EXCLUDE
)
8438 elfsym
->st_name
= 0;
8441 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (flinfo
->symstrtab
,
8443 if (elfsym
->st_name
== (unsigned long) -1)
8447 if (flinfo
->symbuf_count
>= flinfo
->symbuf_size
)
8449 if (! elf_link_flush_output_syms (flinfo
, bed
))
8453 dest
= flinfo
->symbuf
+ flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8454 destshndx
= flinfo
->symshndxbuf
;
8455 if (destshndx
!= NULL
)
8457 if (bfd_get_symcount (flinfo
->output_bfd
) >= flinfo
->shndxbuf_size
)
8461 amt
= flinfo
->shndxbuf_size
* sizeof (Elf_External_Sym_Shndx
);
8462 destshndx
= (Elf_External_Sym_Shndx
*) bfd_realloc (destshndx
,
8464 if (destshndx
== NULL
)
8466 flinfo
->symshndxbuf
= destshndx
;
8467 memset ((char *) destshndx
+ amt
, 0, amt
);
8468 flinfo
->shndxbuf_size
*= 2;
8470 destshndx
+= bfd_get_symcount (flinfo
->output_bfd
);
8473 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, elfsym
, dest
, destshndx
);
8474 flinfo
->symbuf_count
+= 1;
8475 bfd_get_symcount (flinfo
->output_bfd
) += 1;
8480 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
8483 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
8485 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
8486 && sym
->st_shndx
< SHN_LORESERVE
)
8488 /* The gABI doesn't support dynamic symbols in output sections
8490 (*_bfd_error_handler
)
8491 (_("%B: Too many sections: %d (>= %d)"),
8492 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
8493 bfd_set_error (bfd_error_nonrepresentable_section
);
8499 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
8500 allowing an unsatisfied unversioned symbol in the DSO to match a
8501 versioned symbol that would normally require an explicit version.
8502 We also handle the case that a DSO references a hidden symbol
8503 which may be satisfied by a versioned symbol in another DSO. */
8506 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
8507 const struct elf_backend_data
*bed
,
8508 struct elf_link_hash_entry
*h
)
8511 struct elf_link_loaded_list
*loaded
;
8513 if (!is_elf_hash_table (info
->hash
))
8516 /* Check indirect symbol. */
8517 while (h
->root
.type
== bfd_link_hash_indirect
)
8518 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8520 switch (h
->root
.type
)
8526 case bfd_link_hash_undefined
:
8527 case bfd_link_hash_undefweak
:
8528 abfd
= h
->root
.u
.undef
.abfd
;
8529 if ((abfd
->flags
& DYNAMIC
) == 0
8530 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
8534 case bfd_link_hash_defined
:
8535 case bfd_link_hash_defweak
:
8536 abfd
= h
->root
.u
.def
.section
->owner
;
8539 case bfd_link_hash_common
:
8540 abfd
= h
->root
.u
.c
.p
->section
->owner
;
8543 BFD_ASSERT (abfd
!= NULL
);
8545 for (loaded
= elf_hash_table (info
)->loaded
;
8547 loaded
= loaded
->next
)
8550 Elf_Internal_Shdr
*hdr
;
8551 bfd_size_type symcount
;
8552 bfd_size_type extsymcount
;
8553 bfd_size_type extsymoff
;
8554 Elf_Internal_Shdr
*versymhdr
;
8555 Elf_Internal_Sym
*isym
;
8556 Elf_Internal_Sym
*isymend
;
8557 Elf_Internal_Sym
*isymbuf
;
8558 Elf_External_Versym
*ever
;
8559 Elf_External_Versym
*extversym
;
8561 input
= loaded
->abfd
;
8563 /* We check each DSO for a possible hidden versioned definition. */
8565 || (input
->flags
& DYNAMIC
) == 0
8566 || elf_dynversym (input
) == 0)
8569 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
8571 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
8572 if (elf_bad_symtab (input
))
8574 extsymcount
= symcount
;
8579 extsymcount
= symcount
- hdr
->sh_info
;
8580 extsymoff
= hdr
->sh_info
;
8583 if (extsymcount
== 0)
8586 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
8588 if (isymbuf
== NULL
)
8591 /* Read in any version definitions. */
8592 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
8593 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
8594 if (extversym
== NULL
)
8597 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
8598 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
8599 != versymhdr
->sh_size
))
8607 ever
= extversym
+ extsymoff
;
8608 isymend
= isymbuf
+ extsymcount
;
8609 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
8612 Elf_Internal_Versym iver
;
8613 unsigned short version_index
;
8615 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
8616 || isym
->st_shndx
== SHN_UNDEF
)
8619 name
= bfd_elf_string_from_elf_section (input
,
8622 if (strcmp (name
, h
->root
.root
.string
) != 0)
8625 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
8627 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
8629 && h
->forced_local
))
8631 /* If we have a non-hidden versioned sym, then it should
8632 have provided a definition for the undefined sym unless
8633 it is defined in a non-shared object and forced local.
8638 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
8639 if (version_index
== 1 || version_index
== 2)
8641 /* This is the base or first version. We can use it. */
8655 /* Add an external symbol to the symbol table. This is called from
8656 the hash table traversal routine. When generating a shared object,
8657 we go through the symbol table twice. The first time we output
8658 anything that might have been forced to local scope in a version
8659 script. The second time we output the symbols that are still
8663 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
8665 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
8666 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
8667 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
8669 Elf_Internal_Sym sym
;
8670 asection
*input_sec
;
8671 const struct elf_backend_data
*bed
;
8675 if (h
->root
.type
== bfd_link_hash_warning
)
8677 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8678 if (h
->root
.type
== bfd_link_hash_new
)
8682 /* Decide whether to output this symbol in this pass. */
8683 if (eoinfo
->localsyms
)
8685 if (!h
->forced_local
)
8687 if (eoinfo
->second_pass
8688 && !((h
->root
.type
== bfd_link_hash_defined
8689 || h
->root
.type
== bfd_link_hash_defweak
)
8690 && h
->root
.u
.def
.section
->output_section
!= NULL
))
8693 if (!eoinfo
->file_sym_done
8694 && (eoinfo
->second_pass
? eoinfo
->flinfo
->filesym_count
== 1
8695 : eoinfo
->flinfo
->filesym_count
> 1))
8697 /* Output a FILE symbol so that following locals are not associated
8698 with the wrong input file. */
8699 memset (&sym
, 0, sizeof (sym
));
8700 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
8701 sym
.st_shndx
= SHN_ABS
;
8702 if (!elf_link_output_sym (eoinfo
->flinfo
, NULL
, &sym
,
8703 bfd_und_section_ptr
, NULL
))
8706 eoinfo
->file_sym_done
= TRUE
;
8711 if (h
->forced_local
)
8715 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8717 if (h
->root
.type
== bfd_link_hash_undefined
)
8719 /* If we have an undefined symbol reference here then it must have
8720 come from a shared library that is being linked in. (Undefined
8721 references in regular files have already been handled unless
8722 they are in unreferenced sections which are removed by garbage
8724 bfd_boolean ignore_undef
= FALSE
;
8726 /* Some symbols may be special in that the fact that they're
8727 undefined can be safely ignored - let backend determine that. */
8728 if (bed
->elf_backend_ignore_undef_symbol
)
8729 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
8731 /* If we are reporting errors for this situation then do so now. */
8734 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
8735 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
8736 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
8738 if (!(flinfo
->info
->callbacks
->undefined_symbol
8739 (flinfo
->info
, h
->root
.root
.string
,
8740 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
,
8742 (flinfo
->info
->unresolved_syms_in_shared_libs
8743 == RM_GENERATE_ERROR
))))
8745 bfd_set_error (bfd_error_bad_value
);
8746 eoinfo
->failed
= TRUE
;
8752 /* We should also warn if a forced local symbol is referenced from
8753 shared libraries. */
8754 if (!flinfo
->info
->relocatable
8755 && flinfo
->info
->executable
8760 && h
->ref_dynamic_nonweak
8761 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
8765 struct elf_link_hash_entry
*hi
= h
;
8767 /* Check indirect symbol. */
8768 while (hi
->root
.type
== bfd_link_hash_indirect
)
8769 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
8771 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
8772 msg
= _("%B: internal symbol `%s' in %B is referenced by DSO");
8773 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
8774 msg
= _("%B: hidden symbol `%s' in %B is referenced by DSO");
8776 msg
= _("%B: local symbol `%s' in %B is referenced by DSO");
8777 def_bfd
= flinfo
->output_bfd
;
8778 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
8779 def_bfd
= hi
->root
.u
.def
.section
->owner
;
8780 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, def_bfd
,
8781 h
->root
.root
.string
);
8782 bfd_set_error (bfd_error_bad_value
);
8783 eoinfo
->failed
= TRUE
;
8787 /* We don't want to output symbols that have never been mentioned by
8788 a regular file, or that we have been told to strip. However, if
8789 h->indx is set to -2, the symbol is used by a reloc and we must
8793 else if ((h
->def_dynamic
8795 || h
->root
.type
== bfd_link_hash_new
)
8799 else if (flinfo
->info
->strip
== strip_all
)
8801 else if (flinfo
->info
->strip
== strip_some
8802 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
8803 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
8805 else if ((h
->root
.type
== bfd_link_hash_defined
8806 || h
->root
.type
== bfd_link_hash_defweak
)
8807 && ((flinfo
->info
->strip_discarded
8808 && discarded_section (h
->root
.u
.def
.section
))
8809 || (h
->root
.u
.def
.section
->owner
!= NULL
8810 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
8812 else if ((h
->root
.type
== bfd_link_hash_undefined
8813 || h
->root
.type
== bfd_link_hash_undefweak
)
8814 && h
->root
.u
.undef
.abfd
!= NULL
8815 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
8820 /* If we're stripping it, and it's not a dynamic symbol, there's
8821 nothing else to do unless it is a forced local symbol or a
8822 STT_GNU_IFUNC symbol. */
8825 && h
->type
!= STT_GNU_IFUNC
8826 && !h
->forced_local
)
8830 sym
.st_size
= h
->size
;
8831 sym
.st_other
= h
->other
;
8832 if (h
->forced_local
)
8834 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
8835 /* Turn off visibility on local symbol. */
8836 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
8838 /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */
8839 else if (h
->unique_global
&& h
->def_regular
)
8840 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, h
->type
);
8841 else if (h
->root
.type
== bfd_link_hash_undefweak
8842 || h
->root
.type
== bfd_link_hash_defweak
)
8843 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
8845 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
8846 sym
.st_target_internal
= h
->target_internal
;
8848 switch (h
->root
.type
)
8851 case bfd_link_hash_new
:
8852 case bfd_link_hash_warning
:
8856 case bfd_link_hash_undefined
:
8857 case bfd_link_hash_undefweak
:
8858 input_sec
= bfd_und_section_ptr
;
8859 sym
.st_shndx
= SHN_UNDEF
;
8862 case bfd_link_hash_defined
:
8863 case bfd_link_hash_defweak
:
8865 input_sec
= h
->root
.u
.def
.section
;
8866 if (input_sec
->output_section
!= NULL
)
8868 if (eoinfo
->localsyms
&& flinfo
->filesym_count
== 1)
8870 bfd_boolean second_pass_sym
8871 = (input_sec
->owner
== flinfo
->output_bfd
8872 || input_sec
->owner
== NULL
8873 || (input_sec
->flags
& SEC_LINKER_CREATED
) != 0
8874 || (input_sec
->owner
->flags
& BFD_LINKER_CREATED
) != 0);
8876 eoinfo
->need_second_pass
|= second_pass_sym
;
8877 if (eoinfo
->second_pass
!= second_pass_sym
)
8882 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
8883 input_sec
->output_section
);
8884 if (sym
.st_shndx
== SHN_BAD
)
8886 (*_bfd_error_handler
)
8887 (_("%B: could not find output section %A for input section %A"),
8888 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
8889 bfd_set_error (bfd_error_nonrepresentable_section
);
8890 eoinfo
->failed
= TRUE
;
8894 /* ELF symbols in relocatable files are section relative,
8895 but in nonrelocatable files they are virtual
8897 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
8898 if (!flinfo
->info
->relocatable
)
8900 sym
.st_value
+= input_sec
->output_section
->vma
;
8901 if (h
->type
== STT_TLS
)
8903 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
8904 if (tls_sec
!= NULL
)
8905 sym
.st_value
-= tls_sec
->vma
;
8908 /* The TLS section may have been garbage collected. */
8909 BFD_ASSERT (flinfo
->info
->gc_sections
8910 && !input_sec
->gc_mark
);
8917 BFD_ASSERT (input_sec
->owner
== NULL
8918 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
8919 sym
.st_shndx
= SHN_UNDEF
;
8920 input_sec
= bfd_und_section_ptr
;
8925 case bfd_link_hash_common
:
8926 input_sec
= h
->root
.u
.c
.p
->section
;
8927 sym
.st_shndx
= bed
->common_section_index (input_sec
);
8928 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
8931 case bfd_link_hash_indirect
:
8932 /* These symbols are created by symbol versioning. They point
8933 to the decorated version of the name. For example, if the
8934 symbol foo@@GNU_1.2 is the default, which should be used when
8935 foo is used with no version, then we add an indirect symbol
8936 foo which points to foo@@GNU_1.2. We ignore these symbols,
8937 since the indirected symbol is already in the hash table. */
8941 /* Give the processor backend a chance to tweak the symbol value,
8942 and also to finish up anything that needs to be done for this
8943 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
8944 forced local syms when non-shared is due to a historical quirk.
8945 STT_GNU_IFUNC symbol must go through PLT. */
8946 if ((h
->type
== STT_GNU_IFUNC
8948 && !flinfo
->info
->relocatable
)
8949 || ((h
->dynindx
!= -1
8951 && ((flinfo
->info
->shared
8952 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8953 || h
->root
.type
!= bfd_link_hash_undefweak
))
8954 || !h
->forced_local
)
8955 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
8957 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
8958 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
8960 eoinfo
->failed
= TRUE
;
8965 /* If we are marking the symbol as undefined, and there are no
8966 non-weak references to this symbol from a regular object, then
8967 mark the symbol as weak undefined; if there are non-weak
8968 references, mark the symbol as strong. We can't do this earlier,
8969 because it might not be marked as undefined until the
8970 finish_dynamic_symbol routine gets through with it. */
8971 if (sym
.st_shndx
== SHN_UNDEF
8973 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
8974 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
8977 unsigned int type
= ELF_ST_TYPE (sym
.st_info
);
8979 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
8980 if (type
== STT_GNU_IFUNC
)
8983 if (h
->ref_regular_nonweak
)
8984 bindtype
= STB_GLOBAL
;
8986 bindtype
= STB_WEAK
;
8987 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
8990 /* If this is a symbol defined in a dynamic library, don't use the
8991 symbol size from the dynamic library. Relinking an executable
8992 against a new library may introduce gratuitous changes in the
8993 executable's symbols if we keep the size. */
8994 if (sym
.st_shndx
== SHN_UNDEF
8999 /* If a non-weak symbol with non-default visibility is not defined
9000 locally, it is a fatal error. */
9001 if (!flinfo
->info
->relocatable
9002 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
9003 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
9004 && h
->root
.type
== bfd_link_hash_undefined
9009 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
9010 msg
= _("%B: protected symbol `%s' isn't defined");
9011 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
9012 msg
= _("%B: internal symbol `%s' isn't defined");
9014 msg
= _("%B: hidden symbol `%s' isn't defined");
9015 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
9016 bfd_set_error (bfd_error_bad_value
);
9017 eoinfo
->failed
= TRUE
;
9021 /* If this symbol should be put in the .dynsym section, then put it
9022 there now. We already know the symbol index. We also fill in
9023 the entry in the .hash section. */
9024 if (flinfo
->dynsym_sec
!= NULL
9026 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
)
9030 /* Since there is no version information in the dynamic string,
9031 if there is no version info in symbol version section, we will
9032 have a run-time problem. */
9033 if (h
->verinfo
.verdef
== NULL
)
9035 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
9037 if (p
&& p
[1] != '\0')
9039 (*_bfd_error_handler
)
9040 (_("%B: No symbol version section for versioned symbol `%s'"),
9041 flinfo
->output_bfd
, h
->root
.root
.string
);
9042 eoinfo
->failed
= TRUE
;
9047 sym
.st_name
= h
->dynstr_index
;
9048 esym
= flinfo
->dynsym_sec
->contents
+ h
->dynindx
* bed
->s
->sizeof_sym
;
9049 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
9051 eoinfo
->failed
= TRUE
;
9054 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
9056 if (flinfo
->hash_sec
!= NULL
)
9058 size_t hash_entry_size
;
9059 bfd_byte
*bucketpos
;
9064 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
9065 bucket
= h
->u
.elf_hash_value
% bucketcount
;
9068 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
9069 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
9070 + (bucket
+ 2) * hash_entry_size
);
9071 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
9072 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
9074 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
9075 ((bfd_byte
*) flinfo
->hash_sec
->contents
9076 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
9079 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
9081 Elf_Internal_Versym iversym
;
9082 Elf_External_Versym
*eversym
;
9084 if (!h
->def_regular
)
9086 if (h
->verinfo
.verdef
== NULL
)
9087 iversym
.vs_vers
= 0;
9089 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
9093 if (h
->verinfo
.vertree
== NULL
)
9094 iversym
.vs_vers
= 1;
9096 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
9097 if (flinfo
->info
->create_default_symver
)
9102 iversym
.vs_vers
|= VERSYM_HIDDEN
;
9104 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
9105 eversym
+= h
->dynindx
;
9106 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
9110 /* If we're stripping it, then it was just a dynamic symbol, and
9111 there's nothing else to do. */
9112 if (strip
|| (input_sec
->flags
& SEC_EXCLUDE
) != 0)
9115 indx
= bfd_get_symcount (flinfo
->output_bfd
);
9116 ret
= elf_link_output_sym (flinfo
, h
->root
.root
.string
, &sym
, input_sec
, h
);
9119 eoinfo
->failed
= TRUE
;
9124 else if (h
->indx
== -2)
9130 /* Return TRUE if special handling is done for relocs in SEC against
9131 symbols defined in discarded sections. */
9134 elf_section_ignore_discarded_relocs (asection
*sec
)
9136 const struct elf_backend_data
*bed
;
9138 switch (sec
->sec_info_type
)
9140 case SEC_INFO_TYPE_STABS
:
9141 case SEC_INFO_TYPE_EH_FRAME
:
9147 bed
= get_elf_backend_data (sec
->owner
);
9148 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
9149 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
9155 /* Return a mask saying how ld should treat relocations in SEC against
9156 symbols defined in discarded sections. If this function returns
9157 COMPLAIN set, ld will issue a warning message. If this function
9158 returns PRETEND set, and the discarded section was link-once and the
9159 same size as the kept link-once section, ld will pretend that the
9160 symbol was actually defined in the kept section. Otherwise ld will
9161 zero the reloc (at least that is the intent, but some cooperation by
9162 the target dependent code is needed, particularly for REL targets). */
9165 _bfd_elf_default_action_discarded (asection
*sec
)
9167 if (sec
->flags
& SEC_DEBUGGING
)
9170 if (strcmp (".eh_frame", sec
->name
) == 0)
9173 if (strcmp (".gcc_except_table", sec
->name
) == 0)
9176 return COMPLAIN
| PRETEND
;
9179 /* Find a match between a section and a member of a section group. */
9182 match_group_member (asection
*sec
, asection
*group
,
9183 struct bfd_link_info
*info
)
9185 asection
*first
= elf_next_in_group (group
);
9186 asection
*s
= first
;
9190 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
9193 s
= elf_next_in_group (s
);
9201 /* Check if the kept section of a discarded section SEC can be used
9202 to replace it. Return the replacement if it is OK. Otherwise return
9206 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
9210 kept
= sec
->kept_section
;
9213 if ((kept
->flags
& SEC_GROUP
) != 0)
9214 kept
= match_group_member (sec
, kept
, info
);
9216 && ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
9217 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
)))
9219 sec
->kept_section
= kept
;
9224 /* Link an input file into the linker output file. This function
9225 handles all the sections and relocations of the input file at once.
9226 This is so that we only have to read the local symbols once, and
9227 don't have to keep them in memory. */
9230 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
9232 int (*relocate_section
)
9233 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
9234 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
9236 Elf_Internal_Shdr
*symtab_hdr
;
9239 Elf_Internal_Sym
*isymbuf
;
9240 Elf_Internal_Sym
*isym
;
9241 Elf_Internal_Sym
*isymend
;
9243 asection
**ppsection
;
9245 const struct elf_backend_data
*bed
;
9246 struct elf_link_hash_entry
**sym_hashes
;
9247 bfd_size_type address_size
;
9248 bfd_vma r_type_mask
;
9250 bfd_boolean have_file_sym
= FALSE
;
9252 output_bfd
= flinfo
->output_bfd
;
9253 bed
= get_elf_backend_data (output_bfd
);
9254 relocate_section
= bed
->elf_backend_relocate_section
;
9256 /* If this is a dynamic object, we don't want to do anything here:
9257 we don't want the local symbols, and we don't want the section
9259 if ((input_bfd
->flags
& DYNAMIC
) != 0)
9262 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
9263 if (elf_bad_symtab (input_bfd
))
9265 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9270 locsymcount
= symtab_hdr
->sh_info
;
9271 extsymoff
= symtab_hdr
->sh_info
;
9274 /* Read the local symbols. */
9275 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
9276 if (isymbuf
== NULL
&& locsymcount
!= 0)
9278 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
9279 flinfo
->internal_syms
,
9280 flinfo
->external_syms
,
9281 flinfo
->locsym_shndx
);
9282 if (isymbuf
== NULL
)
9286 /* Find local symbol sections and adjust values of symbols in
9287 SEC_MERGE sections. Write out those local symbols we know are
9288 going into the output file. */
9289 isymend
= isymbuf
+ locsymcount
;
9290 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
9292 isym
++, pindex
++, ppsection
++)
9296 Elf_Internal_Sym osym
;
9302 if (elf_bad_symtab (input_bfd
))
9304 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
9311 if (isym
->st_shndx
== SHN_UNDEF
)
9312 isec
= bfd_und_section_ptr
;
9313 else if (isym
->st_shndx
== SHN_ABS
)
9314 isec
= bfd_abs_section_ptr
;
9315 else if (isym
->st_shndx
== SHN_COMMON
)
9316 isec
= bfd_com_section_ptr
;
9319 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
9322 /* Don't attempt to output symbols with st_shnx in the
9323 reserved range other than SHN_ABS and SHN_COMMON. */
9327 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
9328 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
9330 _bfd_merged_section_offset (output_bfd
, &isec
,
9331 elf_section_data (isec
)->sec_info
,
9337 /* Don't output the first, undefined, symbol. */
9338 if (ppsection
== flinfo
->sections
)
9341 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
9343 /* We never output section symbols. Instead, we use the
9344 section symbol of the corresponding section in the output
9349 /* If we are stripping all symbols, we don't want to output this
9351 if (flinfo
->info
->strip
== strip_all
)
9354 /* If we are discarding all local symbols, we don't want to
9355 output this one. If we are generating a relocatable output
9356 file, then some of the local symbols may be required by
9357 relocs; we output them below as we discover that they are
9359 if (flinfo
->info
->discard
== discard_all
)
9362 /* If this symbol is defined in a section which we are
9363 discarding, we don't need to keep it. */
9364 if (isym
->st_shndx
!= SHN_UNDEF
9365 && isym
->st_shndx
< SHN_LORESERVE
9366 && bfd_section_removed_from_list (output_bfd
,
9367 isec
->output_section
))
9370 /* Get the name of the symbol. */
9371 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
9376 /* See if we are discarding symbols with this name. */
9377 if ((flinfo
->info
->strip
== strip_some
9378 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
9380 || (((flinfo
->info
->discard
== discard_sec_merge
9381 && (isec
->flags
& SEC_MERGE
) && !flinfo
->info
->relocatable
)
9382 || flinfo
->info
->discard
== discard_l
)
9383 && bfd_is_local_label_name (input_bfd
, name
)))
9386 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
9388 have_file_sym
= TRUE
;
9389 flinfo
->filesym_count
+= 1;
9393 /* In the absence of debug info, bfd_find_nearest_line uses
9394 FILE symbols to determine the source file for local
9395 function symbols. Provide a FILE symbol here if input
9396 files lack such, so that their symbols won't be
9397 associated with a previous input file. It's not the
9398 source file, but the best we can do. */
9399 have_file_sym
= TRUE
;
9400 flinfo
->filesym_count
+= 1;
9401 memset (&osym
, 0, sizeof (osym
));
9402 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
9403 osym
.st_shndx
= SHN_ABS
;
9404 if (!elf_link_output_sym (flinfo
, input_bfd
->filename
, &osym
,
9405 bfd_abs_section_ptr
, NULL
))
9411 /* Adjust the section index for the output file. */
9412 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9413 isec
->output_section
);
9414 if (osym
.st_shndx
== SHN_BAD
)
9417 /* ELF symbols in relocatable files are section relative, but
9418 in executable files they are virtual addresses. Note that
9419 this code assumes that all ELF sections have an associated
9420 BFD section with a reasonable value for output_offset; below
9421 we assume that they also have a reasonable value for
9422 output_section. Any special sections must be set up to meet
9423 these requirements. */
9424 osym
.st_value
+= isec
->output_offset
;
9425 if (!flinfo
->info
->relocatable
)
9427 osym
.st_value
+= isec
->output_section
->vma
;
9428 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
9430 /* STT_TLS symbols are relative to PT_TLS segment base. */
9431 BFD_ASSERT (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
);
9432 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
9436 indx
= bfd_get_symcount (output_bfd
);
9437 ret
= elf_link_output_sym (flinfo
, name
, &osym
, isec
, NULL
);
9444 if (bed
->s
->arch_size
== 32)
9452 r_type_mask
= 0xffffffff;
9457 /* Relocate the contents of each section. */
9458 sym_hashes
= elf_sym_hashes (input_bfd
);
9459 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
9463 if (! o
->linker_mark
)
9465 /* This section was omitted from the link. */
9469 if (flinfo
->info
->relocatable
9470 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
9472 /* Deal with the group signature symbol. */
9473 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
9474 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
9475 asection
*osec
= o
->output_section
;
9477 if (symndx
>= locsymcount
9478 || (elf_bad_symtab (input_bfd
)
9479 && flinfo
->sections
[symndx
] == NULL
))
9481 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
9482 while (h
->root
.type
== bfd_link_hash_indirect
9483 || h
->root
.type
== bfd_link_hash_warning
)
9484 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9485 /* Arrange for symbol to be output. */
9487 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
9489 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
9491 /* We'll use the output section target_index. */
9492 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9493 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
9497 if (flinfo
->indices
[symndx
] == -1)
9499 /* Otherwise output the local symbol now. */
9500 Elf_Internal_Sym sym
= isymbuf
[symndx
];
9501 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9506 name
= bfd_elf_string_from_elf_section (input_bfd
,
9507 symtab_hdr
->sh_link
,
9512 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9514 if (sym
.st_shndx
== SHN_BAD
)
9517 sym
.st_value
+= o
->output_offset
;
9519 indx
= bfd_get_symcount (output_bfd
);
9520 ret
= elf_link_output_sym (flinfo
, name
, &sym
, o
, NULL
);
9524 flinfo
->indices
[symndx
] = indx
;
9528 elf_section_data (osec
)->this_hdr
.sh_info
9529 = flinfo
->indices
[symndx
];
9533 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
9534 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
9537 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
9539 /* Section was created by _bfd_elf_link_create_dynamic_sections
9544 /* Get the contents of the section. They have been cached by a
9545 relaxation routine. Note that o is a section in an input
9546 file, so the contents field will not have been set by any of
9547 the routines which work on output files. */
9548 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
9549 contents
= elf_section_data (o
)->this_hdr
.contents
;
9552 contents
= flinfo
->contents
;
9553 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
9557 if ((o
->flags
& SEC_RELOC
) != 0)
9559 Elf_Internal_Rela
*internal_relocs
;
9560 Elf_Internal_Rela
*rel
, *relend
;
9561 int action_discarded
;
9564 /* Get the swapped relocs. */
9566 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
9567 flinfo
->internal_relocs
, FALSE
);
9568 if (internal_relocs
== NULL
9569 && o
->reloc_count
> 0)
9572 /* We need to reverse-copy input .ctors/.dtors sections if
9573 they are placed in .init_array/.finit_array for output. */
9574 if (o
->size
> address_size
9575 && ((strncmp (o
->name
, ".ctors", 6) == 0
9576 && strcmp (o
->output_section
->name
,
9577 ".init_array") == 0)
9578 || (strncmp (o
->name
, ".dtors", 6) == 0
9579 && strcmp (o
->output_section
->name
,
9580 ".fini_array") == 0))
9581 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
9583 if (o
->size
!= o
->reloc_count
* address_size
)
9585 (*_bfd_error_handler
)
9586 (_("error: %B: size of section %A is not "
9587 "multiple of address size"),
9589 bfd_set_error (bfd_error_on_input
);
9592 o
->flags
|= SEC_ELF_REVERSE_COPY
;
9595 action_discarded
= -1;
9596 if (!elf_section_ignore_discarded_relocs (o
))
9597 action_discarded
= (*bed
->action_discarded
) (o
);
9599 /* Run through the relocs evaluating complex reloc symbols and
9600 looking for relocs against symbols from discarded sections
9601 or section symbols from removed link-once sections.
9602 Complain about relocs against discarded sections. Zero
9603 relocs against removed link-once sections. */
9605 rel
= internal_relocs
;
9606 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9607 for ( ; rel
< relend
; rel
++)
9609 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
9610 unsigned int s_type
;
9611 asection
**ps
, *sec
;
9612 struct elf_link_hash_entry
*h
= NULL
;
9613 const char *sym_name
;
9615 if (r_symndx
== STN_UNDEF
)
9618 if (r_symndx
>= locsymcount
9619 || (elf_bad_symtab (input_bfd
)
9620 && flinfo
->sections
[r_symndx
] == NULL
))
9622 h
= sym_hashes
[r_symndx
- extsymoff
];
9624 /* Badly formatted input files can contain relocs that
9625 reference non-existant symbols. Check here so that
9626 we do not seg fault. */
9631 sprintf_vma (buffer
, rel
->r_info
);
9632 (*_bfd_error_handler
)
9633 (_("error: %B contains a reloc (0x%s) for section %A "
9634 "that references a non-existent global symbol"),
9635 input_bfd
, o
, buffer
);
9636 bfd_set_error (bfd_error_bad_value
);
9640 while (h
->root
.type
== bfd_link_hash_indirect
9641 || h
->root
.type
== bfd_link_hash_warning
)
9642 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9647 if (h
->root
.type
== bfd_link_hash_defined
9648 || h
->root
.type
== bfd_link_hash_defweak
)
9649 ps
= &h
->root
.u
.def
.section
;
9651 sym_name
= h
->root
.root
.string
;
9655 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
9657 s_type
= ELF_ST_TYPE (sym
->st_info
);
9658 ps
= &flinfo
->sections
[r_symndx
];
9659 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
9663 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
9664 && !flinfo
->info
->relocatable
)
9667 bfd_vma dot
= (rel
->r_offset
9668 + o
->output_offset
+ o
->output_section
->vma
);
9670 printf ("Encountered a complex symbol!");
9671 printf (" (input_bfd %s, section %s, reloc %ld\n",
9672 input_bfd
->filename
, o
->name
,
9673 (long) (rel
- internal_relocs
));
9674 printf (" symbol: idx %8.8lx, name %s\n",
9675 r_symndx
, sym_name
);
9676 printf (" reloc : info %8.8lx, addr %8.8lx\n",
9677 (unsigned long) rel
->r_info
,
9678 (unsigned long) rel
->r_offset
);
9680 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
9681 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
9684 /* Symbol evaluated OK. Update to absolute value. */
9685 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
9690 if (action_discarded
!= -1 && ps
!= NULL
)
9692 /* Complain if the definition comes from a
9693 discarded section. */
9694 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
9696 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
9697 if (action_discarded
& COMPLAIN
)
9698 (*flinfo
->info
->callbacks
->einfo
)
9699 (_("%X`%s' referenced in section `%A' of %B: "
9700 "defined in discarded section `%A' of %B\n"),
9701 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
9703 /* Try to do the best we can to support buggy old
9704 versions of gcc. Pretend that the symbol is
9705 really defined in the kept linkonce section.
9706 FIXME: This is quite broken. Modifying the
9707 symbol here means we will be changing all later
9708 uses of the symbol, not just in this section. */
9709 if (action_discarded
& PRETEND
)
9713 kept
= _bfd_elf_check_kept_section (sec
,
9725 /* Relocate the section by invoking a back end routine.
9727 The back end routine is responsible for adjusting the
9728 section contents as necessary, and (if using Rela relocs
9729 and generating a relocatable output file) adjusting the
9730 reloc addend as necessary.
9732 The back end routine does not have to worry about setting
9733 the reloc address or the reloc symbol index.
9735 The back end routine is given a pointer to the swapped in
9736 internal symbols, and can access the hash table entries
9737 for the external symbols via elf_sym_hashes (input_bfd).
9739 When generating relocatable output, the back end routine
9740 must handle STB_LOCAL/STT_SECTION symbols specially. The
9741 output symbol is going to be a section symbol
9742 corresponding to the output section, which will require
9743 the addend to be adjusted. */
9745 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
9746 input_bfd
, o
, contents
,
9754 || flinfo
->info
->relocatable
9755 || flinfo
->info
->emitrelocations
)
9757 Elf_Internal_Rela
*irela
;
9758 Elf_Internal_Rela
*irelaend
, *irelamid
;
9759 bfd_vma last_offset
;
9760 struct elf_link_hash_entry
**rel_hash
;
9761 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
9762 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
9763 unsigned int next_erel
;
9764 bfd_boolean rela_normal
;
9765 struct bfd_elf_section_data
*esdi
, *esdo
;
9767 esdi
= elf_section_data (o
);
9768 esdo
= elf_section_data (o
->output_section
);
9769 rela_normal
= FALSE
;
9771 /* Adjust the reloc addresses and symbol indices. */
9773 irela
= internal_relocs
;
9774 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9775 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
9776 /* We start processing the REL relocs, if any. When we reach
9777 IRELAMID in the loop, we switch to the RELA relocs. */
9779 if (esdi
->rel
.hdr
!= NULL
)
9780 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
9781 * bed
->s
->int_rels_per_ext_rel
);
9782 rel_hash_list
= rel_hash
;
9783 rela_hash_list
= NULL
;
9784 last_offset
= o
->output_offset
;
9785 if (!flinfo
->info
->relocatable
)
9786 last_offset
+= o
->output_section
->vma
;
9787 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
9789 unsigned long r_symndx
;
9791 Elf_Internal_Sym sym
;
9793 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
9799 if (irela
== irelamid
)
9801 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
9802 rela_hash_list
= rel_hash
;
9803 rela_normal
= bed
->rela_normal
;
9806 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
9809 if (irela
->r_offset
>= (bfd_vma
) -2)
9811 /* This is a reloc for a deleted entry or somesuch.
9812 Turn it into an R_*_NONE reloc, at the same
9813 offset as the last reloc. elf_eh_frame.c and
9814 bfd_elf_discard_info rely on reloc offsets
9816 irela
->r_offset
= last_offset
;
9818 irela
->r_addend
= 0;
9822 irela
->r_offset
+= o
->output_offset
;
9824 /* Relocs in an executable have to be virtual addresses. */
9825 if (!flinfo
->info
->relocatable
)
9826 irela
->r_offset
+= o
->output_section
->vma
;
9828 last_offset
= irela
->r_offset
;
9830 r_symndx
= irela
->r_info
>> r_sym_shift
;
9831 if (r_symndx
== STN_UNDEF
)
9834 if (r_symndx
>= locsymcount
9835 || (elf_bad_symtab (input_bfd
)
9836 && flinfo
->sections
[r_symndx
] == NULL
))
9838 struct elf_link_hash_entry
*rh
;
9841 /* This is a reloc against a global symbol. We
9842 have not yet output all the local symbols, so
9843 we do not know the symbol index of any global
9844 symbol. We set the rel_hash entry for this
9845 reloc to point to the global hash table entry
9846 for this symbol. The symbol index is then
9847 set at the end of bfd_elf_final_link. */
9848 indx
= r_symndx
- extsymoff
;
9849 rh
= elf_sym_hashes (input_bfd
)[indx
];
9850 while (rh
->root
.type
== bfd_link_hash_indirect
9851 || rh
->root
.type
== bfd_link_hash_warning
)
9852 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
9854 /* Setting the index to -2 tells
9855 elf_link_output_extsym that this symbol is
9857 BFD_ASSERT (rh
->indx
< 0);
9865 /* This is a reloc against a local symbol. */
9868 sym
= isymbuf
[r_symndx
];
9869 sec
= flinfo
->sections
[r_symndx
];
9870 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
9872 /* I suppose the backend ought to fill in the
9873 section of any STT_SECTION symbol against a
9874 processor specific section. */
9875 r_symndx
= STN_UNDEF
;
9876 if (bfd_is_abs_section (sec
))
9878 else if (sec
== NULL
|| sec
->owner
== NULL
)
9880 bfd_set_error (bfd_error_bad_value
);
9885 asection
*osec
= sec
->output_section
;
9887 /* If we have discarded a section, the output
9888 section will be the absolute section. In
9889 case of discarded SEC_MERGE sections, use
9890 the kept section. relocate_section should
9891 have already handled discarded linkonce
9893 if (bfd_is_abs_section (osec
)
9894 && sec
->kept_section
!= NULL
9895 && sec
->kept_section
->output_section
!= NULL
)
9897 osec
= sec
->kept_section
->output_section
;
9898 irela
->r_addend
-= osec
->vma
;
9901 if (!bfd_is_abs_section (osec
))
9903 r_symndx
= osec
->target_index
;
9904 if (r_symndx
== STN_UNDEF
)
9906 irela
->r_addend
+= osec
->vma
;
9907 osec
= _bfd_nearby_section (output_bfd
, osec
,
9909 irela
->r_addend
-= osec
->vma
;
9910 r_symndx
= osec
->target_index
;
9915 /* Adjust the addend according to where the
9916 section winds up in the output section. */
9918 irela
->r_addend
+= sec
->output_offset
;
9922 if (flinfo
->indices
[r_symndx
] == -1)
9924 unsigned long shlink
;
9929 if (flinfo
->info
->strip
== strip_all
)
9931 /* You can't do ld -r -s. */
9932 bfd_set_error (bfd_error_invalid_operation
);
9936 /* This symbol was skipped earlier, but
9937 since it is needed by a reloc, we
9938 must output it now. */
9939 shlink
= symtab_hdr
->sh_link
;
9940 name
= (bfd_elf_string_from_elf_section
9941 (input_bfd
, shlink
, sym
.st_name
));
9945 osec
= sec
->output_section
;
9947 _bfd_elf_section_from_bfd_section (output_bfd
,
9949 if (sym
.st_shndx
== SHN_BAD
)
9952 sym
.st_value
+= sec
->output_offset
;
9953 if (!flinfo
->info
->relocatable
)
9955 sym
.st_value
+= osec
->vma
;
9956 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
9958 /* STT_TLS symbols are relative to PT_TLS
9960 BFD_ASSERT (elf_hash_table (flinfo
->info
)
9962 sym
.st_value
-= (elf_hash_table (flinfo
->info
)
9967 indx
= bfd_get_symcount (output_bfd
);
9968 ret
= elf_link_output_sym (flinfo
, name
, &sym
, sec
,
9973 flinfo
->indices
[r_symndx
] = indx
;
9978 r_symndx
= flinfo
->indices
[r_symndx
];
9981 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
9982 | (irela
->r_info
& r_type_mask
));
9985 /* Swap out the relocs. */
9986 input_rel_hdr
= esdi
->rel
.hdr
;
9987 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
9989 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
9994 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
9995 * bed
->s
->int_rels_per_ext_rel
);
9996 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
9999 input_rela_hdr
= esdi
->rela
.hdr
;
10000 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
10002 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
10011 /* Write out the modified section contents. */
10012 if (bed
->elf_backend_write_section
10013 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
10016 /* Section written out. */
10018 else switch (o
->sec_info_type
)
10020 case SEC_INFO_TYPE_STABS
:
10021 if (! (_bfd_write_section_stabs
10023 &elf_hash_table (flinfo
->info
)->stab_info
,
10024 o
, &elf_section_data (o
)->sec_info
, contents
)))
10027 case SEC_INFO_TYPE_MERGE
:
10028 if (! _bfd_write_merged_section (output_bfd
, o
,
10029 elf_section_data (o
)->sec_info
))
10032 case SEC_INFO_TYPE_EH_FRAME
:
10034 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
10041 /* FIXME: octets_per_byte. */
10042 if (! (o
->flags
& SEC_EXCLUDE
))
10044 file_ptr offset
= (file_ptr
) o
->output_offset
;
10045 bfd_size_type todo
= o
->size
;
10046 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
10048 /* Reverse-copy input section to output. */
10051 todo
-= address_size
;
10052 if (! bfd_set_section_contents (output_bfd
,
10060 offset
+= address_size
;
10064 else if (! bfd_set_section_contents (output_bfd
,
10078 /* Generate a reloc when linking an ELF file. This is a reloc
10079 requested by the linker, and does not come from any input file. This
10080 is used to build constructor and destructor tables when linking
10084 elf_reloc_link_order (bfd
*output_bfd
,
10085 struct bfd_link_info
*info
,
10086 asection
*output_section
,
10087 struct bfd_link_order
*link_order
)
10089 reloc_howto_type
*howto
;
10093 struct bfd_elf_section_reloc_data
*reldata
;
10094 struct elf_link_hash_entry
**rel_hash_ptr
;
10095 Elf_Internal_Shdr
*rel_hdr
;
10096 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
10097 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
10100 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
10102 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
10105 bfd_set_error (bfd_error_bad_value
);
10109 addend
= link_order
->u
.reloc
.p
->addend
;
10112 reldata
= &esdo
->rel
;
10113 else if (esdo
->rela
.hdr
)
10114 reldata
= &esdo
->rela
;
10121 /* Figure out the symbol index. */
10122 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
10123 if (link_order
->type
== bfd_section_reloc_link_order
)
10125 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
10126 BFD_ASSERT (indx
!= 0);
10127 *rel_hash_ptr
= NULL
;
10131 struct elf_link_hash_entry
*h
;
10133 /* Treat a reloc against a defined symbol as though it were
10134 actually against the section. */
10135 h
= ((struct elf_link_hash_entry
*)
10136 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
10137 link_order
->u
.reloc
.p
->u
.name
,
10138 FALSE
, FALSE
, TRUE
));
10140 && (h
->root
.type
== bfd_link_hash_defined
10141 || h
->root
.type
== bfd_link_hash_defweak
))
10145 section
= h
->root
.u
.def
.section
;
10146 indx
= section
->output_section
->target_index
;
10147 *rel_hash_ptr
= NULL
;
10148 /* It seems that we ought to add the symbol value to the
10149 addend here, but in practice it has already been added
10150 because it was passed to constructor_callback. */
10151 addend
+= section
->output_section
->vma
+ section
->output_offset
;
10153 else if (h
!= NULL
)
10155 /* Setting the index to -2 tells elf_link_output_extsym that
10156 this symbol is used by a reloc. */
10163 if (! ((*info
->callbacks
->unattached_reloc
)
10164 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0)))
10170 /* If this is an inplace reloc, we must write the addend into the
10172 if (howto
->partial_inplace
&& addend
!= 0)
10174 bfd_size_type size
;
10175 bfd_reloc_status_type rstat
;
10178 const char *sym_name
;
10180 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
10181 buf
= (bfd_byte
*) bfd_zmalloc (size
);
10184 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
10191 case bfd_reloc_outofrange
:
10194 case bfd_reloc_overflow
:
10195 if (link_order
->type
== bfd_section_reloc_link_order
)
10196 sym_name
= bfd_section_name (output_bfd
,
10197 link_order
->u
.reloc
.p
->u
.section
);
10199 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
10200 if (! ((*info
->callbacks
->reloc_overflow
)
10201 (info
, NULL
, sym_name
, howto
->name
, addend
, NULL
,
10202 NULL
, (bfd_vma
) 0)))
10209 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
10210 link_order
->offset
, size
);
10216 /* The address of a reloc is relative to the section in a
10217 relocatable file, and is a virtual address in an executable
10219 offset
= link_order
->offset
;
10220 if (! info
->relocatable
)
10221 offset
+= output_section
->vma
;
10223 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
10225 irel
[i
].r_offset
= offset
;
10226 irel
[i
].r_info
= 0;
10227 irel
[i
].r_addend
= 0;
10229 if (bed
->s
->arch_size
== 32)
10230 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
10232 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
10234 rel_hdr
= reldata
->hdr
;
10235 erel
= rel_hdr
->contents
;
10236 if (rel_hdr
->sh_type
== SHT_REL
)
10238 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
10239 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
10243 irel
[0].r_addend
= addend
;
10244 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
10245 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
10254 /* Get the output vma of the section pointed to by the sh_link field. */
10257 elf_get_linked_section_vma (struct bfd_link_order
*p
)
10259 Elf_Internal_Shdr
**elf_shdrp
;
10263 s
= p
->u
.indirect
.section
;
10264 elf_shdrp
= elf_elfsections (s
->owner
);
10265 elfsec
= _bfd_elf_section_from_bfd_section (s
->owner
, s
);
10266 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
10268 The Intel C compiler generates SHT_IA_64_UNWIND with
10269 SHF_LINK_ORDER. But it doesn't set the sh_link or
10270 sh_info fields. Hence we could get the situation
10271 where elfsec is 0. */
10274 const struct elf_backend_data
*bed
10275 = get_elf_backend_data (s
->owner
);
10276 if (bed
->link_order_error_handler
)
10277 bed
->link_order_error_handler
10278 (_("%B: warning: sh_link not set for section `%A'"), s
->owner
, s
);
10283 s
= elf_shdrp
[elfsec
]->bfd_section
;
10284 return s
->output_section
->vma
+ s
->output_offset
;
10289 /* Compare two sections based on the locations of the sections they are
10290 linked to. Used by elf_fixup_link_order. */
10293 compare_link_order (const void * a
, const void * b
)
10298 apos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)a
);
10299 bpos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)b
);
10302 return apos
> bpos
;
10306 /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
10307 order as their linked sections. Returns false if this could not be done
10308 because an output section includes both ordered and unordered
10309 sections. Ideally we'd do this in the linker proper. */
10312 elf_fixup_link_order (bfd
*abfd
, asection
*o
)
10314 int seen_linkorder
;
10317 struct bfd_link_order
*p
;
10319 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10321 struct bfd_link_order
**sections
;
10322 asection
*s
, *other_sec
, *linkorder_sec
;
10326 linkorder_sec
= NULL
;
10328 seen_linkorder
= 0;
10329 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10331 if (p
->type
== bfd_indirect_link_order
)
10333 s
= p
->u
.indirect
.section
;
10335 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10336 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
10337 && (elfsec
= _bfd_elf_section_from_bfd_section (sub
, s
))
10338 && elfsec
< elf_numsections (sub
)
10339 && elf_elfsections (sub
)[elfsec
]->sh_flags
& SHF_LINK_ORDER
10340 && elf_elfsections (sub
)[elfsec
]->sh_link
< elf_numsections (sub
))
10354 if (seen_other
&& seen_linkorder
)
10356 if (other_sec
&& linkorder_sec
)
10357 (*_bfd_error_handler
) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"),
10359 linkorder_sec
->owner
, other_sec
,
10362 (*_bfd_error_handler
) (_("%A has both ordered and unordered sections"),
10364 bfd_set_error (bfd_error_bad_value
);
10369 if (!seen_linkorder
)
10372 sections
= (struct bfd_link_order
**)
10373 bfd_malloc (seen_linkorder
* sizeof (struct bfd_link_order
*));
10374 if (sections
== NULL
)
10376 seen_linkorder
= 0;
10378 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10380 sections
[seen_linkorder
++] = p
;
10382 /* Sort the input sections in the order of their linked section. */
10383 qsort (sections
, seen_linkorder
, sizeof (struct bfd_link_order
*),
10384 compare_link_order
);
10386 /* Change the offsets of the sections. */
10388 for (n
= 0; n
< seen_linkorder
; n
++)
10390 s
= sections
[n
]->u
.indirect
.section
;
10391 offset
&= ~(bfd_vma
) 0 << s
->alignment_power
;
10392 s
->output_offset
= offset
;
10393 sections
[n
]->offset
= offset
;
10394 /* FIXME: octets_per_byte. */
10395 offset
+= sections
[n
]->size
;
10403 elf_final_link_free (bfd
*obfd
, struct elf_final_link_info
*flinfo
)
10407 if (flinfo
->symstrtab
!= NULL
)
10408 _bfd_stringtab_free (flinfo
->symstrtab
);
10409 if (flinfo
->contents
!= NULL
)
10410 free (flinfo
->contents
);
10411 if (flinfo
->external_relocs
!= NULL
)
10412 free (flinfo
->external_relocs
);
10413 if (flinfo
->internal_relocs
!= NULL
)
10414 free (flinfo
->internal_relocs
);
10415 if (flinfo
->external_syms
!= NULL
)
10416 free (flinfo
->external_syms
);
10417 if (flinfo
->locsym_shndx
!= NULL
)
10418 free (flinfo
->locsym_shndx
);
10419 if (flinfo
->internal_syms
!= NULL
)
10420 free (flinfo
->internal_syms
);
10421 if (flinfo
->indices
!= NULL
)
10422 free (flinfo
->indices
);
10423 if (flinfo
->sections
!= NULL
)
10424 free (flinfo
->sections
);
10425 if (flinfo
->symbuf
!= NULL
)
10426 free (flinfo
->symbuf
);
10427 if (flinfo
->symshndxbuf
!= NULL
)
10428 free (flinfo
->symshndxbuf
);
10429 for (o
= obfd
->sections
; o
!= NULL
; o
= o
->next
)
10431 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10432 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
10433 free (esdo
->rel
.hashes
);
10434 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
10435 free (esdo
->rela
.hashes
);
10439 /* Do the final step of an ELF link. */
10442 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
10444 bfd_boolean dynamic
;
10445 bfd_boolean emit_relocs
;
10447 struct elf_final_link_info flinfo
;
10449 struct bfd_link_order
*p
;
10451 bfd_size_type max_contents_size
;
10452 bfd_size_type max_external_reloc_size
;
10453 bfd_size_type max_internal_reloc_count
;
10454 bfd_size_type max_sym_count
;
10455 bfd_size_type max_sym_shndx_count
;
10457 Elf_Internal_Sym elfsym
;
10459 Elf_Internal_Shdr
*symtab_hdr
;
10460 Elf_Internal_Shdr
*symtab_shndx_hdr
;
10461 Elf_Internal_Shdr
*symstrtab_hdr
;
10462 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10463 struct elf_outext_info eoinfo
;
10464 bfd_boolean merged
;
10465 size_t relativecount
= 0;
10466 asection
*reldyn
= 0;
10468 asection
*attr_section
= NULL
;
10469 bfd_vma attr_size
= 0;
10470 const char *std_attrs_section
;
10472 if (! is_elf_hash_table (info
->hash
))
10476 abfd
->flags
|= DYNAMIC
;
10478 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
10479 dynobj
= elf_hash_table (info
)->dynobj
;
10481 emit_relocs
= (info
->relocatable
10482 || info
->emitrelocations
);
10484 flinfo
.info
= info
;
10485 flinfo
.output_bfd
= abfd
;
10486 flinfo
.symstrtab
= _bfd_elf_stringtab_init ();
10487 if (flinfo
.symstrtab
== NULL
)
10492 flinfo
.dynsym_sec
= NULL
;
10493 flinfo
.hash_sec
= NULL
;
10494 flinfo
.symver_sec
= NULL
;
10498 flinfo
.dynsym_sec
= bfd_get_linker_section (dynobj
, ".dynsym");
10499 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
10500 /* Note that dynsym_sec can be NULL (on VMS). */
10501 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
10502 /* Note that it is OK if symver_sec is NULL. */
10505 flinfo
.contents
= NULL
;
10506 flinfo
.external_relocs
= NULL
;
10507 flinfo
.internal_relocs
= NULL
;
10508 flinfo
.external_syms
= NULL
;
10509 flinfo
.locsym_shndx
= NULL
;
10510 flinfo
.internal_syms
= NULL
;
10511 flinfo
.indices
= NULL
;
10512 flinfo
.sections
= NULL
;
10513 flinfo
.symbuf
= NULL
;
10514 flinfo
.symshndxbuf
= NULL
;
10515 flinfo
.symbuf_count
= 0;
10516 flinfo
.shndxbuf_size
= 0;
10517 flinfo
.filesym_count
= 0;
10519 /* The object attributes have been merged. Remove the input
10520 sections from the link, and set the contents of the output
10522 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
10523 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10525 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
10526 || strcmp (o
->name
, ".gnu.attributes") == 0)
10528 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10530 asection
*input_section
;
10532 if (p
->type
!= bfd_indirect_link_order
)
10534 input_section
= p
->u
.indirect
.section
;
10535 /* Hack: reset the SEC_HAS_CONTENTS flag so that
10536 elf_link_input_bfd ignores this section. */
10537 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
10540 attr_size
= bfd_elf_obj_attr_size (abfd
);
10543 bfd_set_section_size (abfd
, o
, attr_size
);
10545 /* Skip this section later on. */
10546 o
->map_head
.link_order
= NULL
;
10549 o
->flags
|= SEC_EXCLUDE
;
10553 /* Count up the number of relocations we will output for each output
10554 section, so that we know the sizes of the reloc sections. We
10555 also figure out some maximum sizes. */
10556 max_contents_size
= 0;
10557 max_external_reloc_size
= 0;
10558 max_internal_reloc_count
= 0;
10560 max_sym_shndx_count
= 0;
10562 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10564 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10565 o
->reloc_count
= 0;
10567 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10569 unsigned int reloc_count
= 0;
10570 struct bfd_elf_section_data
*esdi
= NULL
;
10572 if (p
->type
== bfd_section_reloc_link_order
10573 || p
->type
== bfd_symbol_reloc_link_order
)
10575 else if (p
->type
== bfd_indirect_link_order
)
10579 sec
= p
->u
.indirect
.section
;
10580 esdi
= elf_section_data (sec
);
10582 /* Mark all sections which are to be included in the
10583 link. This will normally be every section. We need
10584 to do this so that we can identify any sections which
10585 the linker has decided to not include. */
10586 sec
->linker_mark
= TRUE
;
10588 if (sec
->flags
& SEC_MERGE
)
10591 if (esdo
->this_hdr
.sh_type
== SHT_REL
10592 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
10593 /* Some backends use reloc_count in relocation sections
10594 to count particular types of relocs. Of course,
10595 reloc sections themselves can't have relocations. */
10597 else if (info
->relocatable
|| info
->emitrelocations
)
10598 reloc_count
= sec
->reloc_count
;
10599 else if (bed
->elf_backend_count_relocs
)
10600 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
10602 if (sec
->rawsize
> max_contents_size
)
10603 max_contents_size
= sec
->rawsize
;
10604 if (sec
->size
> max_contents_size
)
10605 max_contents_size
= sec
->size
;
10607 /* We are interested in just local symbols, not all
10609 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
10610 && (sec
->owner
->flags
& DYNAMIC
) == 0)
10614 if (elf_bad_symtab (sec
->owner
))
10615 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
10616 / bed
->s
->sizeof_sym
);
10618 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
10620 if (sym_count
> max_sym_count
)
10621 max_sym_count
= sym_count
;
10623 if (sym_count
> max_sym_shndx_count
10624 && elf_symtab_shndx (sec
->owner
) != 0)
10625 max_sym_shndx_count
= sym_count
;
10627 if ((sec
->flags
& SEC_RELOC
) != 0)
10629 size_t ext_size
= 0;
10631 if (esdi
->rel
.hdr
!= NULL
)
10632 ext_size
= esdi
->rel
.hdr
->sh_size
;
10633 if (esdi
->rela
.hdr
!= NULL
)
10634 ext_size
+= esdi
->rela
.hdr
->sh_size
;
10636 if (ext_size
> max_external_reloc_size
)
10637 max_external_reloc_size
= ext_size
;
10638 if (sec
->reloc_count
> max_internal_reloc_count
)
10639 max_internal_reloc_count
= sec
->reloc_count
;
10644 if (reloc_count
== 0)
10647 o
->reloc_count
+= reloc_count
;
10649 if (p
->type
== bfd_indirect_link_order
10650 && (info
->relocatable
|| info
->emitrelocations
))
10653 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
10654 if (esdi
->rela
.hdr
)
10655 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
10660 esdo
->rela
.count
+= reloc_count
;
10662 esdo
->rel
.count
+= reloc_count
;
10666 if (o
->reloc_count
> 0)
10667 o
->flags
|= SEC_RELOC
;
10670 /* Explicitly clear the SEC_RELOC flag. The linker tends to
10671 set it (this is probably a bug) and if it is set
10672 assign_section_numbers will create a reloc section. */
10673 o
->flags
&=~ SEC_RELOC
;
10676 /* If the SEC_ALLOC flag is not set, force the section VMA to
10677 zero. This is done in elf_fake_sections as well, but forcing
10678 the VMA to 0 here will ensure that relocs against these
10679 sections are handled correctly. */
10680 if ((o
->flags
& SEC_ALLOC
) == 0
10681 && ! o
->user_set_vma
)
10685 if (! info
->relocatable
&& merged
)
10686 elf_link_hash_traverse (elf_hash_table (info
),
10687 _bfd_elf_link_sec_merge_syms
, abfd
);
10689 /* Figure out the file positions for everything but the symbol table
10690 and the relocs. We set symcount to force assign_section_numbers
10691 to create a symbol table. */
10692 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
10693 BFD_ASSERT (! abfd
->output_has_begun
);
10694 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
10697 /* Set sizes, and assign file positions for reloc sections. */
10698 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10700 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10701 if ((o
->flags
& SEC_RELOC
) != 0)
10704 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
10708 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
10712 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
10713 to count upwards while actually outputting the relocations. */
10714 esdo
->rel
.count
= 0;
10715 esdo
->rela
.count
= 0;
10718 _bfd_elf_assign_file_positions_for_relocs (abfd
);
10720 /* We have now assigned file positions for all the sections except
10721 .symtab and .strtab. We start the .symtab section at the current
10722 file position, and write directly to it. We build the .strtab
10723 section in memory. */
10724 bfd_get_symcount (abfd
) = 0;
10725 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
10726 /* sh_name is set in prep_headers. */
10727 symtab_hdr
->sh_type
= SHT_SYMTAB
;
10728 /* sh_flags, sh_addr and sh_size all start off zero. */
10729 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
10730 /* sh_link is set in assign_section_numbers. */
10731 /* sh_info is set below. */
10732 /* sh_offset is set just below. */
10733 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
10735 off
= elf_next_file_pos (abfd
);
10736 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
10738 /* Note that at this point elf_next_file_pos (abfd) is
10739 incorrect. We do not yet know the size of the .symtab section.
10740 We correct next_file_pos below, after we do know the size. */
10742 /* Allocate a buffer to hold swapped out symbols. This is to avoid
10743 continuously seeking to the right position in the file. */
10744 if (! info
->keep_memory
|| max_sym_count
< 20)
10745 flinfo
.symbuf_size
= 20;
10747 flinfo
.symbuf_size
= max_sym_count
;
10748 amt
= flinfo
.symbuf_size
;
10749 amt
*= bed
->s
->sizeof_sym
;
10750 flinfo
.symbuf
= (bfd_byte
*) bfd_malloc (amt
);
10751 if (flinfo
.symbuf
== NULL
)
10753 if (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF))
10755 /* Wild guess at number of output symbols. realloc'd as needed. */
10756 amt
= 2 * max_sym_count
+ elf_numsections (abfd
) + 1000;
10757 flinfo
.shndxbuf_size
= amt
;
10758 amt
*= sizeof (Elf_External_Sym_Shndx
);
10759 flinfo
.symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
10760 if (flinfo
.symshndxbuf
== NULL
)
10764 /* Start writing out the symbol table. The first symbol is always a
10766 if (info
->strip
!= strip_all
10769 elfsym
.st_value
= 0;
10770 elfsym
.st_size
= 0;
10771 elfsym
.st_info
= 0;
10772 elfsym
.st_other
= 0;
10773 elfsym
.st_shndx
= SHN_UNDEF
;
10774 elfsym
.st_target_internal
= 0;
10775 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, bfd_und_section_ptr
,
10780 /* Output a symbol for each section. We output these even if we are
10781 discarding local symbols, since they are used for relocs. These
10782 symbols have no names. We store the index of each one in the
10783 index field of the section, so that we can find it again when
10784 outputting relocs. */
10785 if (info
->strip
!= strip_all
10788 elfsym
.st_size
= 0;
10789 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
10790 elfsym
.st_other
= 0;
10791 elfsym
.st_value
= 0;
10792 elfsym
.st_target_internal
= 0;
10793 for (i
= 1; i
< elf_numsections (abfd
); i
++)
10795 o
= bfd_section_from_elf_index (abfd
, i
);
10798 o
->target_index
= bfd_get_symcount (abfd
);
10799 elfsym
.st_shndx
= i
;
10800 if (!info
->relocatable
)
10801 elfsym
.st_value
= o
->vma
;
10802 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, o
, NULL
) != 1)
10808 /* Allocate some memory to hold information read in from the input
10810 if (max_contents_size
!= 0)
10812 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
10813 if (flinfo
.contents
== NULL
)
10817 if (max_external_reloc_size
!= 0)
10819 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
10820 if (flinfo
.external_relocs
== NULL
)
10824 if (max_internal_reloc_count
!= 0)
10826 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
10827 amt
*= sizeof (Elf_Internal_Rela
);
10828 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
10829 if (flinfo
.internal_relocs
== NULL
)
10833 if (max_sym_count
!= 0)
10835 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
10836 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
10837 if (flinfo
.external_syms
== NULL
)
10840 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
10841 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
10842 if (flinfo
.internal_syms
== NULL
)
10845 amt
= max_sym_count
* sizeof (long);
10846 flinfo
.indices
= (long int *) bfd_malloc (amt
);
10847 if (flinfo
.indices
== NULL
)
10850 amt
= max_sym_count
* sizeof (asection
*);
10851 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
10852 if (flinfo
.sections
== NULL
)
10856 if (max_sym_shndx_count
!= 0)
10858 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
10859 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
10860 if (flinfo
.locsym_shndx
== NULL
)
10864 if (elf_hash_table (info
)->tls_sec
)
10866 bfd_vma base
, end
= 0;
10869 for (sec
= elf_hash_table (info
)->tls_sec
;
10870 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
10873 bfd_size_type size
= sec
->size
;
10876 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
10878 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
10881 size
= ord
->offset
+ ord
->size
;
10883 end
= sec
->vma
+ size
;
10885 base
= elf_hash_table (info
)->tls_sec
->vma
;
10886 /* Only align end of TLS section if static TLS doesn't have special
10887 alignment requirements. */
10888 if (bed
->static_tls_alignment
== 1)
10889 end
= align_power (end
,
10890 elf_hash_table (info
)->tls_sec
->alignment_power
);
10891 elf_hash_table (info
)->tls_size
= end
- base
;
10894 /* Reorder SHF_LINK_ORDER sections. */
10895 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10897 if (!elf_fixup_link_order (abfd
, o
))
10901 /* Since ELF permits relocations to be against local symbols, we
10902 must have the local symbols available when we do the relocations.
10903 Since we would rather only read the local symbols once, and we
10904 would rather not keep them in memory, we handle all the
10905 relocations for a single input file at the same time.
10907 Unfortunately, there is no way to know the total number of local
10908 symbols until we have seen all of them, and the local symbol
10909 indices precede the global symbol indices. This means that when
10910 we are generating relocatable output, and we see a reloc against
10911 a global symbol, we can not know the symbol index until we have
10912 finished examining all the local symbols to see which ones we are
10913 going to output. To deal with this, we keep the relocations in
10914 memory, and don't output them until the end of the link. This is
10915 an unfortunate waste of memory, but I don't see a good way around
10916 it. Fortunately, it only happens when performing a relocatable
10917 link, which is not the common case. FIXME: If keep_memory is set
10918 we could write the relocs out and then read them again; I don't
10919 know how bad the memory loss will be. */
10921 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10922 sub
->output_has_begun
= FALSE
;
10923 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10925 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10927 if (p
->type
== bfd_indirect_link_order
10928 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
10929 == bfd_target_elf_flavour
)
10930 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
10932 if (! sub
->output_has_begun
)
10934 if (! elf_link_input_bfd (&flinfo
, sub
))
10936 sub
->output_has_begun
= TRUE
;
10939 else if (p
->type
== bfd_section_reloc_link_order
10940 || p
->type
== bfd_symbol_reloc_link_order
)
10942 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
10947 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
10949 if (p
->type
== bfd_indirect_link_order
10950 && (bfd_get_flavour (sub
)
10951 == bfd_target_elf_flavour
)
10952 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
10953 != bed
->s
->elfclass
))
10955 const char *iclass
, *oclass
;
10957 if (bed
->s
->elfclass
== ELFCLASS64
)
10959 iclass
= "ELFCLASS32";
10960 oclass
= "ELFCLASS64";
10964 iclass
= "ELFCLASS64";
10965 oclass
= "ELFCLASS32";
10968 bfd_set_error (bfd_error_wrong_format
);
10969 (*_bfd_error_handler
)
10970 (_("%B: file class %s incompatible with %s"),
10971 sub
, iclass
, oclass
);
10980 /* Free symbol buffer if needed. */
10981 if (!info
->reduce_memory_overheads
)
10983 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10984 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10985 && elf_tdata (sub
)->symbuf
)
10987 free (elf_tdata (sub
)->symbuf
);
10988 elf_tdata (sub
)->symbuf
= NULL
;
10992 /* Output any global symbols that got converted to local in a
10993 version script or due to symbol visibility. We do this in a
10994 separate step since ELF requires all local symbols to appear
10995 prior to any global symbols. FIXME: We should only do this if
10996 some global symbols were, in fact, converted to become local.
10997 FIXME: Will this work correctly with the Irix 5 linker? */
10998 eoinfo
.failed
= FALSE
;
10999 eoinfo
.flinfo
= &flinfo
;
11000 eoinfo
.localsyms
= TRUE
;
11001 eoinfo
.need_second_pass
= FALSE
;
11002 eoinfo
.second_pass
= FALSE
;
11003 eoinfo
.file_sym_done
= FALSE
;
11004 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11008 if (eoinfo
.need_second_pass
)
11010 eoinfo
.second_pass
= TRUE
;
11011 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11016 /* If backend needs to output some local symbols not present in the hash
11017 table, do it now. */
11018 if (bed
->elf_backend_output_arch_local_syms
)
11020 typedef int (*out_sym_func
)
11021 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11022 struct elf_link_hash_entry
*);
11024 if (! ((*bed
->elf_backend_output_arch_local_syms
)
11025 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
11029 /* That wrote out all the local symbols. Finish up the symbol table
11030 with the global symbols. Even if we want to strip everything we
11031 can, we still need to deal with those global symbols that got
11032 converted to local in a version script. */
11034 /* The sh_info field records the index of the first non local symbol. */
11035 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
11038 && flinfo
.dynsym_sec
!= NULL
11039 && flinfo
.dynsym_sec
->output_section
!= bfd_abs_section_ptr
)
11041 Elf_Internal_Sym sym
;
11042 bfd_byte
*dynsym
= flinfo
.dynsym_sec
->contents
;
11043 long last_local
= 0;
11045 /* Write out the section symbols for the output sections. */
11046 if (info
->shared
|| elf_hash_table (info
)->is_relocatable_executable
)
11052 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
11054 sym
.st_target_internal
= 0;
11056 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
11062 dynindx
= elf_section_data (s
)->dynindx
;
11065 indx
= elf_section_data (s
)->this_idx
;
11066 BFD_ASSERT (indx
> 0);
11067 sym
.st_shndx
= indx
;
11068 if (! check_dynsym (abfd
, &sym
))
11070 sym
.st_value
= s
->vma
;
11071 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
11072 if (last_local
< dynindx
)
11073 last_local
= dynindx
;
11074 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11078 /* Write out the local dynsyms. */
11079 if (elf_hash_table (info
)->dynlocal
)
11081 struct elf_link_local_dynamic_entry
*e
;
11082 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
11087 /* Copy the internal symbol and turn off visibility.
11088 Note that we saved a word of storage and overwrote
11089 the original st_name with the dynstr_index. */
11091 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
11093 s
= bfd_section_from_elf_index (e
->input_bfd
,
11098 elf_section_data (s
->output_section
)->this_idx
;
11099 if (! check_dynsym (abfd
, &sym
))
11101 sym
.st_value
= (s
->output_section
->vma
11103 + e
->isym
.st_value
);
11106 if (last_local
< e
->dynindx
)
11107 last_local
= e
->dynindx
;
11109 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
11110 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11114 elf_section_data (flinfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
11118 /* We get the global symbols from the hash table. */
11119 eoinfo
.failed
= FALSE
;
11120 eoinfo
.localsyms
= FALSE
;
11121 eoinfo
.flinfo
= &flinfo
;
11122 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11126 /* If backend needs to output some symbols not present in the hash
11127 table, do it now. */
11128 if (bed
->elf_backend_output_arch_syms
)
11130 typedef int (*out_sym_func
)
11131 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11132 struct elf_link_hash_entry
*);
11134 if (! ((*bed
->elf_backend_output_arch_syms
)
11135 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
11139 /* Flush all symbols to the file. */
11140 if (! elf_link_flush_output_syms (&flinfo
, bed
))
11143 /* Now we know the size of the symtab section. */
11144 off
+= symtab_hdr
->sh_size
;
11146 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
11147 if (symtab_shndx_hdr
->sh_name
!= 0)
11149 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
11150 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
11151 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
11152 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
11153 symtab_shndx_hdr
->sh_size
= amt
;
11155 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
11158 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
11159 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
11164 /* Finish up and write out the symbol string table (.strtab)
11166 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
11167 /* sh_name was set in prep_headers. */
11168 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
11169 symstrtab_hdr
->sh_flags
= 0;
11170 symstrtab_hdr
->sh_addr
= 0;
11171 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (flinfo
.symstrtab
);
11172 symstrtab_hdr
->sh_entsize
= 0;
11173 symstrtab_hdr
->sh_link
= 0;
11174 symstrtab_hdr
->sh_info
= 0;
11175 /* sh_offset is set just below. */
11176 symstrtab_hdr
->sh_addralign
= 1;
11178 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, TRUE
);
11179 elf_next_file_pos (abfd
) = off
;
11181 if (bfd_get_symcount (abfd
) > 0)
11183 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
11184 || ! _bfd_stringtab_emit (abfd
, flinfo
.symstrtab
))
11188 /* Adjust the relocs to have the correct symbol indices. */
11189 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11191 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11192 if ((o
->flags
& SEC_RELOC
) == 0)
11195 if (esdo
->rel
.hdr
!= NULL
)
11196 elf_link_adjust_relocs (abfd
, &esdo
->rel
);
11197 if (esdo
->rela
.hdr
!= NULL
)
11198 elf_link_adjust_relocs (abfd
, &esdo
->rela
);
11200 /* Set the reloc_count field to 0 to prevent write_relocs from
11201 trying to swap the relocs out itself. */
11202 o
->reloc_count
= 0;
11205 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
11206 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
11208 /* If we are linking against a dynamic object, or generating a
11209 shared library, finish up the dynamic linking information. */
11212 bfd_byte
*dyncon
, *dynconend
;
11214 /* Fix up .dynamic entries. */
11215 o
= bfd_get_linker_section (dynobj
, ".dynamic");
11216 BFD_ASSERT (o
!= NULL
);
11218 dyncon
= o
->contents
;
11219 dynconend
= o
->contents
+ o
->size
;
11220 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11222 Elf_Internal_Dyn dyn
;
11226 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11233 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
11235 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
11237 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
11238 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
11241 dyn
.d_un
.d_val
= relativecount
;
11248 name
= info
->init_function
;
11251 name
= info
->fini_function
;
11254 struct elf_link_hash_entry
*h
;
11256 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
11257 FALSE
, FALSE
, TRUE
);
11259 && (h
->root
.type
== bfd_link_hash_defined
11260 || h
->root
.type
== bfd_link_hash_defweak
))
11262 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
11263 o
= h
->root
.u
.def
.section
;
11264 if (o
->output_section
!= NULL
)
11265 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
11266 + o
->output_offset
);
11269 /* The symbol is imported from another shared
11270 library and does not apply to this one. */
11271 dyn
.d_un
.d_ptr
= 0;
11278 case DT_PREINIT_ARRAYSZ
:
11279 name
= ".preinit_array";
11281 case DT_INIT_ARRAYSZ
:
11282 name
= ".init_array";
11284 case DT_FINI_ARRAYSZ
:
11285 name
= ".fini_array";
11287 o
= bfd_get_section_by_name (abfd
, name
);
11290 (*_bfd_error_handler
)
11291 (_("%B: could not find output section %s"), abfd
, name
);
11295 (*_bfd_error_handler
)
11296 (_("warning: %s section has zero size"), name
);
11297 dyn
.d_un
.d_val
= o
->size
;
11300 case DT_PREINIT_ARRAY
:
11301 name
= ".preinit_array";
11303 case DT_INIT_ARRAY
:
11304 name
= ".init_array";
11306 case DT_FINI_ARRAY
:
11307 name
= ".fini_array";
11314 name
= ".gnu.hash";
11323 name
= ".gnu.version_d";
11326 name
= ".gnu.version_r";
11329 name
= ".gnu.version";
11331 o
= bfd_get_section_by_name (abfd
, name
);
11334 (*_bfd_error_handler
)
11335 (_("%B: could not find output section %s"), abfd
, name
);
11338 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
11340 (*_bfd_error_handler
)
11341 (_("warning: section '%s' is being made into a note"), name
);
11342 bfd_set_error (bfd_error_nonrepresentable_section
);
11345 dyn
.d_un
.d_ptr
= o
->vma
;
11352 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
11356 dyn
.d_un
.d_val
= 0;
11357 dyn
.d_un
.d_ptr
= 0;
11358 for (i
= 1; i
< elf_numsections (abfd
); i
++)
11360 Elf_Internal_Shdr
*hdr
;
11362 hdr
= elf_elfsections (abfd
)[i
];
11363 if (hdr
->sh_type
== type
11364 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
11366 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
11367 dyn
.d_un
.d_val
+= hdr
->sh_size
;
11370 if (dyn
.d_un
.d_ptr
== 0
11371 || hdr
->sh_addr
< dyn
.d_un
.d_ptr
)
11372 dyn
.d_un
.d_ptr
= hdr
->sh_addr
;
11378 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
11382 /* If we have created any dynamic sections, then output them. */
11383 if (dynobj
!= NULL
)
11385 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
11388 /* Check for DT_TEXTREL (late, in case the backend removes it). */
11389 if (((info
->warn_shared_textrel
&& info
->shared
)
11390 || info
->error_textrel
)
11391 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
11393 bfd_byte
*dyncon
, *dynconend
;
11395 dyncon
= o
->contents
;
11396 dynconend
= o
->contents
+ o
->size
;
11397 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11399 Elf_Internal_Dyn dyn
;
11401 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11403 if (dyn
.d_tag
== DT_TEXTREL
)
11405 if (info
->error_textrel
)
11406 info
->callbacks
->einfo
11407 (_("%P%X: read-only segment has dynamic relocations.\n"));
11409 info
->callbacks
->einfo
11410 (_("%P: warning: creating a DT_TEXTREL in a shared object.\n"));
11416 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
11418 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
11420 || o
->output_section
== bfd_abs_section_ptr
)
11422 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
11424 /* At this point, we are only interested in sections
11425 created by _bfd_elf_link_create_dynamic_sections. */
11428 if (elf_hash_table (info
)->stab_info
.stabstr
== o
)
11430 if (elf_hash_table (info
)->eh_info
.hdr_sec
== o
)
11432 if (strcmp (o
->name
, ".dynstr") != 0)
11434 /* FIXME: octets_per_byte. */
11435 if (! bfd_set_section_contents (abfd
, o
->output_section
,
11437 (file_ptr
) o
->output_offset
,
11443 /* The contents of the .dynstr section are actually in a
11445 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
11446 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
11447 || ! _bfd_elf_strtab_emit (abfd
,
11448 elf_hash_table (info
)->dynstr
))
11454 if (info
->relocatable
)
11456 bfd_boolean failed
= FALSE
;
11458 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
11463 /* If we have optimized stabs strings, output them. */
11464 if (elf_hash_table (info
)->stab_info
.stabstr
!= NULL
)
11466 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
11470 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
11473 elf_final_link_free (abfd
, &flinfo
);
11475 elf_linker (abfd
) = TRUE
;
11479 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
11480 if (contents
== NULL
)
11481 return FALSE
; /* Bail out and fail. */
11482 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
11483 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
11490 elf_final_link_free (abfd
, &flinfo
);
11494 /* Initialize COOKIE for input bfd ABFD. */
11497 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
11498 struct bfd_link_info
*info
, bfd
*abfd
)
11500 Elf_Internal_Shdr
*symtab_hdr
;
11501 const struct elf_backend_data
*bed
;
11503 bed
= get_elf_backend_data (abfd
);
11504 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11506 cookie
->abfd
= abfd
;
11507 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
11508 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
11509 if (cookie
->bad_symtab
)
11511 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
11512 cookie
->extsymoff
= 0;
11516 cookie
->locsymcount
= symtab_hdr
->sh_info
;
11517 cookie
->extsymoff
= symtab_hdr
->sh_info
;
11520 if (bed
->s
->arch_size
== 32)
11521 cookie
->r_sym_shift
= 8;
11523 cookie
->r_sym_shift
= 32;
11525 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
11526 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
11528 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
11529 cookie
->locsymcount
, 0,
11531 if (cookie
->locsyms
== NULL
)
11533 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
11536 if (info
->keep_memory
)
11537 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
11542 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
11545 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
11547 Elf_Internal_Shdr
*symtab_hdr
;
11549 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11550 if (cookie
->locsyms
!= NULL
11551 && symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
11552 free (cookie
->locsyms
);
11555 /* Initialize the relocation information in COOKIE for input section SEC
11556 of input bfd ABFD. */
11559 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11560 struct bfd_link_info
*info
, bfd
*abfd
,
11563 const struct elf_backend_data
*bed
;
11565 if (sec
->reloc_count
== 0)
11567 cookie
->rels
= NULL
;
11568 cookie
->relend
= NULL
;
11572 bed
= get_elf_backend_data (abfd
);
11574 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
11575 info
->keep_memory
);
11576 if (cookie
->rels
== NULL
)
11578 cookie
->rel
= cookie
->rels
;
11579 cookie
->relend
= (cookie
->rels
11580 + sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
);
11582 cookie
->rel
= cookie
->rels
;
11586 /* Free the memory allocated by init_reloc_cookie_rels,
11590 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11593 if (cookie
->rels
&& elf_section_data (sec
)->relocs
!= cookie
->rels
)
11594 free (cookie
->rels
);
11597 /* Initialize the whole of COOKIE for input section SEC. */
11600 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11601 struct bfd_link_info
*info
,
11604 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
11606 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
11611 fini_reloc_cookie (cookie
, sec
->owner
);
11616 /* Free the memory allocated by init_reloc_cookie_for_section,
11620 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11623 fini_reloc_cookie_rels (cookie
, sec
);
11624 fini_reloc_cookie (cookie
, sec
->owner
);
11627 /* Garbage collect unused sections. */
11629 /* Default gc_mark_hook. */
11632 _bfd_elf_gc_mark_hook (asection
*sec
,
11633 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
11634 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
11635 struct elf_link_hash_entry
*h
,
11636 Elf_Internal_Sym
*sym
)
11638 const char *sec_name
;
11642 switch (h
->root
.type
)
11644 case bfd_link_hash_defined
:
11645 case bfd_link_hash_defweak
:
11646 return h
->root
.u
.def
.section
;
11648 case bfd_link_hash_common
:
11649 return h
->root
.u
.c
.p
->section
;
11651 case bfd_link_hash_undefined
:
11652 case bfd_link_hash_undefweak
:
11653 /* To work around a glibc bug, keep all XXX input sections
11654 when there is an as yet undefined reference to __start_XXX
11655 or __stop_XXX symbols. The linker will later define such
11656 symbols for orphan input sections that have a name
11657 representable as a C identifier. */
11658 if (strncmp (h
->root
.root
.string
, "__start_", 8) == 0)
11659 sec_name
= h
->root
.root
.string
+ 8;
11660 else if (strncmp (h
->root
.root
.string
, "__stop_", 7) == 0)
11661 sec_name
= h
->root
.root
.string
+ 7;
11665 if (sec_name
&& *sec_name
!= '\0')
11669 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
11671 sec
= bfd_get_section_by_name (i
, sec_name
);
11673 sec
->flags
|= SEC_KEEP
;
11683 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
11688 /* COOKIE->rel describes a relocation against section SEC, which is
11689 a section we've decided to keep. Return the section that contains
11690 the relocation symbol, or NULL if no section contains it. */
11693 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
11694 elf_gc_mark_hook_fn gc_mark_hook
,
11695 struct elf_reloc_cookie
*cookie
)
11697 unsigned long r_symndx
;
11698 struct elf_link_hash_entry
*h
;
11700 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
11701 if (r_symndx
== STN_UNDEF
)
11704 if (r_symndx
>= cookie
->locsymcount
11705 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
11707 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
11708 while (h
->root
.type
== bfd_link_hash_indirect
11709 || h
->root
.type
== bfd_link_hash_warning
)
11710 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11712 /* If this symbol is weak and there is a non-weak definition, we
11713 keep the non-weak definition because many backends put
11714 dynamic reloc info on the non-weak definition for code
11715 handling copy relocs. */
11716 if (h
->u
.weakdef
!= NULL
)
11717 h
->u
.weakdef
->mark
= 1;
11718 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
11721 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
11722 &cookie
->locsyms
[r_symndx
]);
11725 /* COOKIE->rel describes a relocation against section SEC, which is
11726 a section we've decided to keep. Mark the section that contains
11727 the relocation symbol. */
11730 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
11732 elf_gc_mark_hook_fn gc_mark_hook
,
11733 struct elf_reloc_cookie
*cookie
)
11737 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
);
11738 if (rsec
&& !rsec
->gc_mark
)
11740 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
11741 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
11743 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
11749 /* The mark phase of garbage collection. For a given section, mark
11750 it and any sections in this section's group, and all the sections
11751 which define symbols to which it refers. */
11754 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
11756 elf_gc_mark_hook_fn gc_mark_hook
)
11759 asection
*group_sec
, *eh_frame
;
11763 /* Mark all the sections in the group. */
11764 group_sec
= elf_section_data (sec
)->next_in_group
;
11765 if (group_sec
&& !group_sec
->gc_mark
)
11766 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
11769 /* Look through the section relocs. */
11771 eh_frame
= elf_eh_frame_section (sec
->owner
);
11772 if ((sec
->flags
& SEC_RELOC
) != 0
11773 && sec
->reloc_count
> 0
11774 && sec
!= eh_frame
)
11776 struct elf_reloc_cookie cookie
;
11778 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
11782 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
11783 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
11788 fini_reloc_cookie_for_section (&cookie
, sec
);
11792 if (ret
&& eh_frame
&& elf_fde_list (sec
))
11794 struct elf_reloc_cookie cookie
;
11796 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
11800 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
11801 gc_mark_hook
, &cookie
))
11803 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
11810 /* Keep debug and special sections. */
11813 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
11814 elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED
)
11818 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11821 bfd_boolean some_kept
;
11822 bfd_boolean debug_frag_seen
;
11824 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
11827 /* Ensure all linker created sections are kept,
11828 see if any other section is already marked,
11829 and note if we have any fragmented debug sections. */
11830 debug_frag_seen
= some_kept
= FALSE
;
11831 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11833 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
11835 else if (isec
->gc_mark
)
11838 if (debug_frag_seen
== FALSE
11839 && (isec
->flags
& SEC_DEBUGGING
)
11840 && CONST_STRNEQ (isec
->name
, ".debug_line."))
11841 debug_frag_seen
= TRUE
;
11844 /* If no section in this file will be kept, then we can
11845 toss out the debug and special sections. */
11849 /* Keep debug and special sections like .comment when they are
11850 not part of a group, or when we have single-member groups. */
11851 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11852 if ((elf_next_in_group (isec
) == NULL
11853 || elf_next_in_group (isec
) == isec
)
11854 && ((isec
->flags
& SEC_DEBUGGING
) != 0
11855 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0))
11858 if (! debug_frag_seen
)
11861 /* Look for CODE sections which are going to be discarded,
11862 and find and discard any fragmented debug sections which
11863 are associated with that code section. */
11864 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11865 if ((isec
->flags
& SEC_CODE
) != 0
11866 && isec
->gc_mark
== 0)
11871 ilen
= strlen (isec
->name
);
11873 /* Association is determined by the name of the debug section
11874 containing the name of the code section as a suffix. For
11875 example .debug_line.text.foo is a debug section associated
11877 for (dsec
= ibfd
->sections
; dsec
!= NULL
; dsec
= dsec
->next
)
11881 if (dsec
->gc_mark
== 0
11882 || (dsec
->flags
& SEC_DEBUGGING
) == 0)
11885 dlen
= strlen (dsec
->name
);
11888 && strncmp (dsec
->name
+ (dlen
- ilen
),
11889 isec
->name
, ilen
) == 0)
11900 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
11902 struct elf_gc_sweep_symbol_info
11904 struct bfd_link_info
*info
;
11905 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
11910 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
11913 && (((h
->root
.type
== bfd_link_hash_defined
11914 || h
->root
.type
== bfd_link_hash_defweak
)
11915 && !(h
->def_regular
11916 && h
->root
.u
.def
.section
->gc_mark
))
11917 || h
->root
.type
== bfd_link_hash_undefined
11918 || h
->root
.type
== bfd_link_hash_undefweak
))
11920 struct elf_gc_sweep_symbol_info
*inf
;
11922 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
11923 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
11924 h
->def_regular
= 0;
11925 h
->ref_regular
= 0;
11926 h
->ref_regular_nonweak
= 0;
11932 /* The sweep phase of garbage collection. Remove all garbage sections. */
11934 typedef bfd_boolean (*gc_sweep_hook_fn
)
11935 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
11938 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
11941 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11942 gc_sweep_hook_fn gc_sweep_hook
= bed
->gc_sweep_hook
;
11943 unsigned long section_sym_count
;
11944 struct elf_gc_sweep_symbol_info sweep_info
;
11946 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
11950 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
11953 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
11955 /* When any section in a section group is kept, we keep all
11956 sections in the section group. If the first member of
11957 the section group is excluded, we will also exclude the
11959 if (o
->flags
& SEC_GROUP
)
11961 asection
*first
= elf_next_in_group (o
);
11962 o
->gc_mark
= first
->gc_mark
;
11968 /* Skip sweeping sections already excluded. */
11969 if (o
->flags
& SEC_EXCLUDE
)
11972 /* Since this is early in the link process, it is simple
11973 to remove a section from the output. */
11974 o
->flags
|= SEC_EXCLUDE
;
11976 if (info
->print_gc_sections
&& o
->size
!= 0)
11977 _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub
, o
->name
);
11979 /* But we also have to update some of the relocation
11980 info we collected before. */
11982 && (o
->flags
& SEC_RELOC
) != 0
11983 && o
->reloc_count
> 0
11984 && !bfd_is_abs_section (o
->output_section
))
11986 Elf_Internal_Rela
*internal_relocs
;
11990 = _bfd_elf_link_read_relocs (o
->owner
, o
, NULL
, NULL
,
11991 info
->keep_memory
);
11992 if (internal_relocs
== NULL
)
11995 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
11997 if (elf_section_data (o
)->relocs
!= internal_relocs
)
11998 free (internal_relocs
);
12006 /* Remove the symbols that were in the swept sections from the dynamic
12007 symbol table. GCFIXME: Anyone know how to get them out of the
12008 static symbol table as well? */
12009 sweep_info
.info
= info
;
12010 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
12011 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
12014 _bfd_elf_link_renumber_dynsyms (abfd
, info
, §ion_sym_count
);
12018 /* Propagate collected vtable information. This is called through
12019 elf_link_hash_traverse. */
12022 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
12024 /* Those that are not vtables. */
12025 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12028 /* Those vtables that do not have parents, we cannot merge. */
12029 if (h
->vtable
->parent
== (struct elf_link_hash_entry
*) -1)
12032 /* If we've already been done, exit. */
12033 if (h
->vtable
->used
&& h
->vtable
->used
[-1])
12036 /* Make sure the parent's table is up to date. */
12037 elf_gc_propagate_vtable_entries_used (h
->vtable
->parent
, okp
);
12039 if (h
->vtable
->used
== NULL
)
12041 /* None of this table's entries were referenced. Re-use the
12043 h
->vtable
->used
= h
->vtable
->parent
->vtable
->used
;
12044 h
->vtable
->size
= h
->vtable
->parent
->vtable
->size
;
12049 bfd_boolean
*cu
, *pu
;
12051 /* Or the parent's entries into ours. */
12052 cu
= h
->vtable
->used
;
12054 pu
= h
->vtable
->parent
->vtable
->used
;
12057 const struct elf_backend_data
*bed
;
12058 unsigned int log_file_align
;
12060 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
12061 log_file_align
= bed
->s
->log_file_align
;
12062 n
= h
->vtable
->parent
->vtable
->size
>> log_file_align
;
12077 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
12080 bfd_vma hstart
, hend
;
12081 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
12082 const struct elf_backend_data
*bed
;
12083 unsigned int log_file_align
;
12085 /* Take care of both those symbols that do not describe vtables as
12086 well as those that are not loaded. */
12087 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12090 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
12091 || h
->root
.type
== bfd_link_hash_defweak
);
12093 sec
= h
->root
.u
.def
.section
;
12094 hstart
= h
->root
.u
.def
.value
;
12095 hend
= hstart
+ h
->size
;
12097 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
12099 return *(bfd_boolean
*) okp
= FALSE
;
12100 bed
= get_elf_backend_data (sec
->owner
);
12101 log_file_align
= bed
->s
->log_file_align
;
12103 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
12105 for (rel
= relstart
; rel
< relend
; ++rel
)
12106 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
12108 /* If the entry is in use, do nothing. */
12109 if (h
->vtable
->used
12110 && (rel
->r_offset
- hstart
) < h
->vtable
->size
)
12112 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
12113 if (h
->vtable
->used
[entry
])
12116 /* Otherwise, kill it. */
12117 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
12123 /* Mark sections containing dynamically referenced symbols. When
12124 building shared libraries, we must assume that any visible symbol is
12128 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
12130 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
12132 if ((h
->root
.type
== bfd_link_hash_defined
12133 || h
->root
.type
== bfd_link_hash_defweak
)
12135 || ((!info
->executable
|| info
->export_dynamic
)
12137 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
12138 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
12139 && (strchr (h
->root
.root
.string
, ELF_VER_CHR
) != NULL
12140 || !bfd_hide_sym_by_version (info
->version_info
,
12141 h
->root
.root
.string
)))))
12142 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12147 /* Keep all sections containing symbols undefined on the command-line,
12148 and the section containing the entry symbol. */
12151 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
12153 struct bfd_sym_chain
*sym
;
12155 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
12157 struct elf_link_hash_entry
*h
;
12159 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
12160 FALSE
, FALSE
, FALSE
);
12163 && (h
->root
.type
== bfd_link_hash_defined
12164 || h
->root
.type
== bfd_link_hash_defweak
)
12165 && !bfd_is_abs_section (h
->root
.u
.def
.section
))
12166 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12170 /* Do mark and sweep of unused sections. */
12173 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
12175 bfd_boolean ok
= TRUE
;
12177 elf_gc_mark_hook_fn gc_mark_hook
;
12178 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12180 if (!bed
->can_gc_sections
12181 || !is_elf_hash_table (info
->hash
))
12183 (*_bfd_error_handler
)(_("Warning: gc-sections option ignored"));
12187 bed
->gc_keep (info
);
12189 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
12190 at the .eh_frame section if we can mark the FDEs individually. */
12191 _bfd_elf_begin_eh_frame_parsing (info
);
12192 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12195 struct elf_reloc_cookie cookie
;
12197 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
12198 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
12200 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
12201 if (elf_section_data (sec
)->sec_info
12202 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
12203 elf_eh_frame_section (sub
) = sec
;
12204 fini_reloc_cookie_for_section (&cookie
, sec
);
12205 sec
= bfd_get_next_section_by_name (sec
);
12208 _bfd_elf_end_eh_frame_parsing (info
);
12210 /* Apply transitive closure to the vtable entry usage info. */
12211 elf_link_hash_traverse (elf_hash_table (info
),
12212 elf_gc_propagate_vtable_entries_used
,
12217 /* Kill the vtable relocations that were not used. */
12218 elf_link_hash_traverse (elf_hash_table (info
),
12219 elf_gc_smash_unused_vtentry_relocs
,
12224 /* Mark dynamically referenced symbols. */
12225 if (elf_hash_table (info
)->dynamic_sections_created
)
12226 elf_link_hash_traverse (elf_hash_table (info
),
12227 bed
->gc_mark_dynamic_ref
,
12230 /* Grovel through relocs to find out who stays ... */
12231 gc_mark_hook
= bed
->gc_mark_hook
;
12232 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12236 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
12239 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
12240 Also treat note sections as a root, if the section is not part
12242 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12244 && (o
->flags
& SEC_EXCLUDE
) == 0
12245 && ((o
->flags
& SEC_KEEP
) != 0
12246 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
12247 && elf_next_in_group (o
) == NULL
)))
12249 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
12254 /* Allow the backend to mark additional target specific sections. */
12255 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
12257 /* ... and mark SEC_EXCLUDE for those that go. */
12258 return elf_gc_sweep (abfd
, info
);
12261 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
12264 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
12266 struct elf_link_hash_entry
*h
,
12269 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
12270 struct elf_link_hash_entry
**search
, *child
;
12271 bfd_size_type extsymcount
;
12272 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12274 /* The sh_info field of the symtab header tells us where the
12275 external symbols start. We don't care about the local symbols at
12277 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
12278 if (!elf_bad_symtab (abfd
))
12279 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
12281 sym_hashes
= elf_sym_hashes (abfd
);
12282 sym_hashes_end
= sym_hashes
+ extsymcount
;
12284 /* Hunt down the child symbol, which is in this section at the same
12285 offset as the relocation. */
12286 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
12288 if ((child
= *search
) != NULL
12289 && (child
->root
.type
== bfd_link_hash_defined
12290 || child
->root
.type
== bfd_link_hash_defweak
)
12291 && child
->root
.u
.def
.section
== sec
12292 && child
->root
.u
.def
.value
== offset
)
12296 (*_bfd_error_handler
) ("%B: %A+%lu: No symbol found for INHERIT",
12297 abfd
, sec
, (unsigned long) offset
);
12298 bfd_set_error (bfd_error_invalid_operation
);
12302 if (!child
->vtable
)
12304 child
->vtable
= (struct elf_link_virtual_table_entry
*)
12305 bfd_zalloc (abfd
, sizeof (*child
->vtable
));
12306 if (!child
->vtable
)
12311 /* This *should* only be the absolute section. It could potentially
12312 be that someone has defined a non-global vtable though, which
12313 would be bad. It isn't worth paging in the local symbols to be
12314 sure though; that case should simply be handled by the assembler. */
12316 child
->vtable
->parent
= (struct elf_link_hash_entry
*) -1;
12319 child
->vtable
->parent
= h
;
12324 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
12327 bfd_elf_gc_record_vtentry (bfd
*abfd ATTRIBUTE_UNUSED
,
12328 asection
*sec ATTRIBUTE_UNUSED
,
12329 struct elf_link_hash_entry
*h
,
12332 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12333 unsigned int log_file_align
= bed
->s
->log_file_align
;
12337 h
->vtable
= (struct elf_link_virtual_table_entry
*)
12338 bfd_zalloc (abfd
, sizeof (*h
->vtable
));
12343 if (addend
>= h
->vtable
->size
)
12345 size_t size
, bytes
, file_align
;
12346 bfd_boolean
*ptr
= h
->vtable
->used
;
12348 /* While the symbol is undefined, we have to be prepared to handle
12350 file_align
= 1 << log_file_align
;
12351 if (h
->root
.type
== bfd_link_hash_undefined
)
12352 size
= addend
+ file_align
;
12356 if (addend
>= size
)
12358 /* Oops! We've got a reference past the defined end of
12359 the table. This is probably a bug -- shall we warn? */
12360 size
= addend
+ file_align
;
12363 size
= (size
+ file_align
- 1) & -file_align
;
12365 /* Allocate one extra entry for use as a "done" flag for the
12366 consolidation pass. */
12367 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
12371 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
12377 oldbytes
= (((h
->vtable
->size
>> log_file_align
) + 1)
12378 * sizeof (bfd_boolean
));
12379 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
12383 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
12388 /* And arrange for that done flag to be at index -1. */
12389 h
->vtable
->used
= ptr
+ 1;
12390 h
->vtable
->size
= size
;
12393 h
->vtable
->used
[addend
>> log_file_align
] = TRUE
;
12398 /* Map an ELF section header flag to its corresponding string. */
12402 flagword flag_value
;
12403 } elf_flags_to_name_table
;
12405 static elf_flags_to_name_table elf_flags_to_names
[] =
12407 { "SHF_WRITE", SHF_WRITE
},
12408 { "SHF_ALLOC", SHF_ALLOC
},
12409 { "SHF_EXECINSTR", SHF_EXECINSTR
},
12410 { "SHF_MERGE", SHF_MERGE
},
12411 { "SHF_STRINGS", SHF_STRINGS
},
12412 { "SHF_INFO_LINK", SHF_INFO_LINK
},
12413 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
12414 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
12415 { "SHF_GROUP", SHF_GROUP
},
12416 { "SHF_TLS", SHF_TLS
},
12417 { "SHF_MASKOS", SHF_MASKOS
},
12418 { "SHF_EXCLUDE", SHF_EXCLUDE
},
12421 /* Returns TRUE if the section is to be included, otherwise FALSE. */
12423 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
12424 struct flag_info
*flaginfo
,
12427 const bfd_vma sh_flags
= elf_section_flags (section
);
12429 if (!flaginfo
->flags_initialized
)
12431 bfd
*obfd
= info
->output_bfd
;
12432 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12433 struct flag_info_list
*tf
= flaginfo
->flag_list
;
12435 int without_hex
= 0;
12437 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
12440 flagword (*lookup
) (char *);
12442 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
12443 if (lookup
!= NULL
)
12445 flagword hexval
= (*lookup
) ((char *) tf
->name
);
12449 if (tf
->with
== with_flags
)
12450 with_hex
|= hexval
;
12451 else if (tf
->with
== without_flags
)
12452 without_hex
|= hexval
;
12457 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
12459 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
12461 if (tf
->with
== with_flags
)
12462 with_hex
|= elf_flags_to_names
[i
].flag_value
;
12463 else if (tf
->with
== without_flags
)
12464 without_hex
|= elf_flags_to_names
[i
].flag_value
;
12471 info
->callbacks
->einfo
12472 (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
12476 flaginfo
->flags_initialized
= TRUE
;
12477 flaginfo
->only_with_flags
|= with_hex
;
12478 flaginfo
->not_with_flags
|= without_hex
;
12481 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
12484 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
12490 struct alloc_got_off_arg
{
12492 struct bfd_link_info
*info
;
12495 /* We need a special top-level link routine to convert got reference counts
12496 to real got offsets. */
12499 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
12501 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
12502 bfd
*obfd
= gofarg
->info
->output_bfd
;
12503 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12505 if (h
->got
.refcount
> 0)
12507 h
->got
.offset
= gofarg
->gotoff
;
12508 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
12511 h
->got
.offset
= (bfd_vma
) -1;
12516 /* And an accompanying bit to work out final got entry offsets once
12517 we're done. Should be called from final_link. */
12520 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
12521 struct bfd_link_info
*info
)
12524 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12526 struct alloc_got_off_arg gofarg
;
12528 BFD_ASSERT (abfd
== info
->output_bfd
);
12530 if (! is_elf_hash_table (info
->hash
))
12533 /* The GOT offset is relative to the .got section, but the GOT header is
12534 put into the .got.plt section, if the backend uses it. */
12535 if (bed
->want_got_plt
)
12538 gotoff
= bed
->got_header_size
;
12540 /* Do the local .got entries first. */
12541 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
12543 bfd_signed_vma
*local_got
;
12544 bfd_size_type j
, locsymcount
;
12545 Elf_Internal_Shdr
*symtab_hdr
;
12547 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
12550 local_got
= elf_local_got_refcounts (i
);
12554 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
12555 if (elf_bad_symtab (i
))
12556 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
12558 locsymcount
= symtab_hdr
->sh_info
;
12560 for (j
= 0; j
< locsymcount
; ++j
)
12562 if (local_got
[j
] > 0)
12564 local_got
[j
] = gotoff
;
12565 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
12568 local_got
[j
] = (bfd_vma
) -1;
12572 /* Then the global .got entries. .plt refcounts are handled by
12573 adjust_dynamic_symbol */
12574 gofarg
.gotoff
= gotoff
;
12575 gofarg
.info
= info
;
12576 elf_link_hash_traverse (elf_hash_table (info
),
12577 elf_gc_allocate_got_offsets
,
12582 /* Many folk need no more in the way of final link than this, once
12583 got entry reference counting is enabled. */
12586 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
12588 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
12591 /* Invoke the regular ELF backend linker to do all the work. */
12592 return bfd_elf_final_link (abfd
, info
);
12596 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
12598 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
12600 if (rcookie
->bad_symtab
)
12601 rcookie
->rel
= rcookie
->rels
;
12603 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
12605 unsigned long r_symndx
;
12607 if (! rcookie
->bad_symtab
)
12608 if (rcookie
->rel
->r_offset
> offset
)
12610 if (rcookie
->rel
->r_offset
!= offset
)
12613 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
12614 if (r_symndx
== STN_UNDEF
)
12617 if (r_symndx
>= rcookie
->locsymcount
12618 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
12620 struct elf_link_hash_entry
*h
;
12622 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
12624 while (h
->root
.type
== bfd_link_hash_indirect
12625 || h
->root
.type
== bfd_link_hash_warning
)
12626 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12628 if ((h
->root
.type
== bfd_link_hash_defined
12629 || h
->root
.type
== bfd_link_hash_defweak
)
12630 && discarded_section (h
->root
.u
.def
.section
))
12637 /* It's not a relocation against a global symbol,
12638 but it could be a relocation against a local
12639 symbol for a discarded section. */
12641 Elf_Internal_Sym
*isym
;
12643 /* Need to: get the symbol; get the section. */
12644 isym
= &rcookie
->locsyms
[r_symndx
];
12645 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
12646 if (isec
!= NULL
&& discarded_section (isec
))
12654 /* Discard unneeded references to discarded sections.
12655 Returns TRUE if any section's size was changed. */
12656 /* This function assumes that the relocations are in sorted order,
12657 which is true for all known assemblers. */
12660 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
12662 struct elf_reloc_cookie cookie
;
12663 asection
*stab
, *eh
;
12664 const struct elf_backend_data
*bed
;
12666 bfd_boolean ret
= FALSE
;
12668 if (info
->traditional_format
12669 || !is_elf_hash_table (info
->hash
))
12672 _bfd_elf_begin_eh_frame_parsing (info
);
12673 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link_next
)
12675 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
12678 bed
= get_elf_backend_data (abfd
);
12681 if (!info
->relocatable
)
12683 eh
= bfd_get_section_by_name (abfd
, ".eh_frame");
12686 || bfd_is_abs_section (eh
->output_section
)))
12687 eh
= bfd_get_next_section_by_name (eh
);
12690 stab
= bfd_get_section_by_name (abfd
, ".stab");
12692 && (stab
->size
== 0
12693 || bfd_is_abs_section (stab
->output_section
)
12694 || stab
->sec_info_type
!= SEC_INFO_TYPE_STABS
))
12699 && bed
->elf_backend_discard_info
== NULL
)
12702 if (!init_reloc_cookie (&cookie
, info
, abfd
))
12706 && stab
->reloc_count
> 0
12707 && init_reloc_cookie_rels (&cookie
, info
, abfd
, stab
))
12709 if (_bfd_discard_section_stabs (abfd
, stab
,
12710 elf_section_data (stab
)->sec_info
,
12711 bfd_elf_reloc_symbol_deleted_p
,
12714 fini_reloc_cookie_rels (&cookie
, stab
);
12718 && init_reloc_cookie_rels (&cookie
, info
, abfd
, eh
))
12720 _bfd_elf_parse_eh_frame (abfd
, info
, eh
, &cookie
);
12721 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, eh
,
12722 bfd_elf_reloc_symbol_deleted_p
,
12725 fini_reloc_cookie_rels (&cookie
, eh
);
12726 eh
= bfd_get_next_section_by_name (eh
);
12729 if (bed
->elf_backend_discard_info
!= NULL
12730 && (*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
12733 fini_reloc_cookie (&cookie
, abfd
);
12735 _bfd_elf_end_eh_frame_parsing (info
);
12737 if (info
->eh_frame_hdr
12738 && !info
->relocatable
12739 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
12746 _bfd_elf_section_already_linked (bfd
*abfd
,
12748 struct bfd_link_info
*info
)
12751 const char *name
, *key
;
12752 struct bfd_section_already_linked
*l
;
12753 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
12755 if (sec
->output_section
== bfd_abs_section_ptr
)
12758 flags
= sec
->flags
;
12760 /* Return if it isn't a linkonce section. A comdat group section
12761 also has SEC_LINK_ONCE set. */
12762 if ((flags
& SEC_LINK_ONCE
) == 0)
12765 /* Don't put group member sections on our list of already linked
12766 sections. They are handled as a group via their group section. */
12767 if (elf_sec_group (sec
) != NULL
)
12770 /* For a SHT_GROUP section, use the group signature as the key. */
12772 if ((flags
& SEC_GROUP
) != 0
12773 && elf_next_in_group (sec
) != NULL
12774 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
12775 key
= elf_group_name (elf_next_in_group (sec
));
12778 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
12779 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
12780 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
12783 /* Must be a user linkonce section that doesn't follow gcc's
12784 naming convention. In this case we won't be matching
12785 single member groups. */
12789 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
12791 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12793 /* We may have 2 different types of sections on the list: group
12794 sections with a signature of <key> (<key> is some string),
12795 and linkonce sections named .gnu.linkonce.<type>.<key>.
12796 Match like sections. LTO plugin sections are an exception.
12797 They are always named .gnu.linkonce.t.<key> and match either
12798 type of section. */
12799 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
12800 && ((flags
& SEC_GROUP
) != 0
12801 || strcmp (name
, l
->sec
->name
) == 0))
12802 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0)
12804 /* The section has already been linked. See if we should
12805 issue a warning. */
12806 if (!_bfd_handle_already_linked (sec
, l
, info
))
12809 if (flags
& SEC_GROUP
)
12811 asection
*first
= elf_next_in_group (sec
);
12812 asection
*s
= first
;
12816 s
->output_section
= bfd_abs_section_ptr
;
12817 /* Record which group discards it. */
12818 s
->kept_section
= l
->sec
;
12819 s
= elf_next_in_group (s
);
12820 /* These lists are circular. */
12830 /* A single member comdat group section may be discarded by a
12831 linkonce section and vice versa. */
12832 if ((flags
& SEC_GROUP
) != 0)
12834 asection
*first
= elf_next_in_group (sec
);
12836 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
12837 /* Check this single member group against linkonce sections. */
12838 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12839 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12840 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
12842 first
->output_section
= bfd_abs_section_ptr
;
12843 first
->kept_section
= l
->sec
;
12844 sec
->output_section
= bfd_abs_section_ptr
;
12849 /* Check this linkonce section against single member groups. */
12850 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12851 if (l
->sec
->flags
& SEC_GROUP
)
12853 asection
*first
= elf_next_in_group (l
->sec
);
12856 && elf_next_in_group (first
) == first
12857 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
12859 sec
->output_section
= bfd_abs_section_ptr
;
12860 sec
->kept_section
= first
;
12865 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
12866 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
12867 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
12868 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
12869 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
12870 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
12871 `.gnu.linkonce.t.F' section from a different bfd not requiring any
12872 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
12873 The reverse order cannot happen as there is never a bfd with only the
12874 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
12875 matter as here were are looking only for cross-bfd sections. */
12877 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
12878 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12879 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12880 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
12882 if (abfd
!= l
->sec
->owner
)
12883 sec
->output_section
= bfd_abs_section_ptr
;
12887 /* This is the first section with this name. Record it. */
12888 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
12889 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
12890 return sec
->output_section
== bfd_abs_section_ptr
;
12894 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
12896 return sym
->st_shndx
== SHN_COMMON
;
12900 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
12906 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
12908 return bfd_com_section_ptr
;
12912 _bfd_elf_default_got_elt_size (bfd
*abfd
,
12913 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12914 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
12915 bfd
*ibfd ATTRIBUTE_UNUSED
,
12916 unsigned long symndx ATTRIBUTE_UNUSED
)
12918 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12919 return bed
->s
->arch_size
/ 8;
12922 /* Routines to support the creation of dynamic relocs. */
12924 /* Returns the name of the dynamic reloc section associated with SEC. */
12926 static const char *
12927 get_dynamic_reloc_section_name (bfd
* abfd
,
12929 bfd_boolean is_rela
)
12932 const char *old_name
= bfd_get_section_name (NULL
, sec
);
12933 const char *prefix
= is_rela
? ".rela" : ".rel";
12935 if (old_name
== NULL
)
12938 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
12939 sprintf (name
, "%s%s", prefix
, old_name
);
12944 /* Returns the dynamic reloc section associated with SEC.
12945 If necessary compute the name of the dynamic reloc section based
12946 on SEC's name (looked up in ABFD's string table) and the setting
12950 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
12952 bfd_boolean is_rela
)
12954 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12956 if (reloc_sec
== NULL
)
12958 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12962 reloc_sec
= bfd_get_linker_section (abfd
, name
);
12964 if (reloc_sec
!= NULL
)
12965 elf_section_data (sec
)->sreloc
= reloc_sec
;
12972 /* Returns the dynamic reloc section associated with SEC. If the
12973 section does not exist it is created and attached to the DYNOBJ
12974 bfd and stored in the SRELOC field of SEC's elf_section_data
12977 ALIGNMENT is the alignment for the newly created section and
12978 IS_RELA defines whether the name should be .rela.<SEC's name>
12979 or .rel.<SEC's name>. The section name is looked up in the
12980 string table associated with ABFD. */
12983 _bfd_elf_make_dynamic_reloc_section (asection
* sec
,
12985 unsigned int alignment
,
12987 bfd_boolean is_rela
)
12989 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12991 if (reloc_sec
== NULL
)
12993 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12998 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
13000 if (reloc_sec
== NULL
)
13002 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
13003 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
13004 if ((sec
->flags
& SEC_ALLOC
) != 0)
13005 flags
|= SEC_ALLOC
| SEC_LOAD
;
13007 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
13008 if (reloc_sec
!= NULL
)
13010 /* _bfd_elf_get_sec_type_attr chooses a section type by
13011 name. Override as it may be wrong, eg. for a user
13012 section named "auto" we'll get ".relauto" which is
13013 seen to be a .rela section. */
13014 elf_section_type (reloc_sec
) = is_rela
? SHT_RELA
: SHT_REL
;
13015 if (! bfd_set_section_alignment (dynobj
, reloc_sec
, alignment
))
13020 elf_section_data (sec
)->sreloc
= reloc_sec
;
13026 /* Copy the ELF symbol type associated with a linker hash entry. */
13028 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd ATTRIBUTE_UNUSED
,
13029 struct bfd_link_hash_entry
* hdest
,
13030 struct bfd_link_hash_entry
* hsrc
)
13032 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*)hdest
;
13033 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*)hsrc
;
13035 ehdest
->type
= ehsrc
->type
;
13036 ehdest
->target_internal
= ehsrc
->target_internal
;
13039 /* Append a RELA relocation REL to section S in BFD. */
13042 elf_append_rela (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_rela
);
13046 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
13047 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
13050 /* Append a REL relocation REL to section S in BFD. */
13053 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13055 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13056 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
13057 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
13058 bed
->s
->swap_reloc_out (abfd
, rel
, loc
);