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. We only do it
1091 if the existing regular definition won't be dynamic. */
1092 if (pold_alignment
== NULL
1094 && !info
->export_dynamic
1099 && (olddef
|| h
->root
.type
== bfd_link_hash_common
)
1100 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1101 && ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1102 && h
->type
!= STT_NOTYPE
1103 && !(newfunc
&& oldfunc
))
1109 /* Plugin symbol type isn't currently set. Stop bogus errors. */
1110 if (oldbfd
!= NULL
&& (oldbfd
->flags
& BFD_PLUGIN
) != 0)
1111 *type_change_ok
= TRUE
;
1113 /* Check TLS symbol. We don't check undefined symbol introduced by
1115 else if (oldbfd
!= NULL
1116 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1117 && (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
|| h
->type
== STT_TLS
))
1120 bfd_boolean ntdef
, tdef
;
1121 asection
*ntsec
, *tsec
;
1123 if (h
->type
== STT_TLS
)
1143 (*_bfd_error_handler
)
1144 (_("%s: TLS definition in %B section %A "
1145 "mismatches non-TLS definition in %B section %A"),
1146 tbfd
, tsec
, ntbfd
, ntsec
, h
->root
.root
.string
);
1147 else if (!tdef
&& !ntdef
)
1148 (*_bfd_error_handler
)
1149 (_("%s: TLS reference in %B "
1150 "mismatches non-TLS reference in %B"),
1151 tbfd
, ntbfd
, h
->root
.root
.string
);
1153 (*_bfd_error_handler
)
1154 (_("%s: TLS definition in %B section %A "
1155 "mismatches non-TLS reference in %B"),
1156 tbfd
, tsec
, ntbfd
, h
->root
.root
.string
);
1158 (*_bfd_error_handler
)
1159 (_("%s: TLS reference in %B "
1160 "mismatches non-TLS definition in %B section %A"),
1161 tbfd
, ntbfd
, ntsec
, h
->root
.root
.string
);
1163 bfd_set_error (bfd_error_bad_value
);
1167 /* If the old symbol has non-default visibility, we ignore the new
1168 definition from a dynamic object. */
1170 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1171 && !bfd_is_und_section (sec
))
1174 /* Make sure this symbol is dynamic. */
1176 hi
->ref_dynamic
= 1;
1177 /* A protected symbol has external availability. Make sure it is
1178 recorded as dynamic.
1180 FIXME: Should we check type and size for protected symbol? */
1181 if (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
1182 return bfd_elf_link_record_dynamic_symbol (info
, h
);
1187 && ELF_ST_VISIBILITY (sym
->st_other
) != STV_DEFAULT
1190 /* If the new symbol with non-default visibility comes from a
1191 relocatable file and the old definition comes from a dynamic
1192 object, we remove the old definition. */
1193 if (hi
->root
.type
== bfd_link_hash_indirect
)
1195 /* Handle the case where the old dynamic definition is
1196 default versioned. We need to copy the symbol info from
1197 the symbol with default version to the normal one if it
1198 was referenced before. */
1201 hi
->root
.type
= h
->root
.type
;
1202 h
->root
.type
= bfd_link_hash_indirect
;
1203 (*bed
->elf_backend_copy_indirect_symbol
) (info
, hi
, h
);
1205 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1206 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1208 /* If the new symbol is hidden or internal, completely undo
1209 any dynamic link state. */
1210 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1211 h
->forced_local
= 0;
1218 /* FIXME: Should we check type and size for protected symbol? */
1228 /* If the old symbol was undefined before, then it will still be
1229 on the undefs list. If the new symbol is undefined or
1230 common, we can't make it bfd_link_hash_new here, because new
1231 undefined or common symbols will be added to the undefs list
1232 by _bfd_generic_link_add_one_symbol. Symbols may not be
1233 added twice to the undefs list. Also, if the new symbol is
1234 undefweak then we don't want to lose the strong undef. */
1235 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1237 h
->root
.type
= bfd_link_hash_undefined
;
1238 h
->root
.u
.undef
.abfd
= abfd
;
1242 h
->root
.type
= bfd_link_hash_new
;
1243 h
->root
.u
.undef
.abfd
= NULL
;
1246 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1248 /* If the new symbol is hidden or internal, completely undo
1249 any dynamic link state. */
1250 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1251 h
->forced_local
= 0;
1257 /* FIXME: Should we check type and size for protected symbol? */
1263 /* If a new weak symbol definition comes from a regular file and the
1264 old symbol comes from a dynamic library, we treat the new one as
1265 strong. Similarly, an old weak symbol definition from a regular
1266 file is treated as strong when the new symbol comes from a dynamic
1267 library. Further, an old weak symbol from a dynamic library is
1268 treated as strong if the new symbol is from a dynamic library.
1269 This reflects the way glibc's ld.so works.
1271 Do this before setting *type_change_ok or *size_change_ok so that
1272 we warn properly when dynamic library symbols are overridden. */
1274 if (newdef
&& !newdyn
&& olddyn
)
1276 if (olddef
&& newdyn
)
1279 /* Allow changes between different types of function symbol. */
1280 if (newfunc
&& oldfunc
)
1281 *type_change_ok
= TRUE
;
1283 /* It's OK to change the type if either the existing symbol or the
1284 new symbol is weak. A type change is also OK if the old symbol
1285 is undefined and the new symbol is defined. */
1290 && h
->root
.type
== bfd_link_hash_undefined
))
1291 *type_change_ok
= TRUE
;
1293 /* It's OK to change the size if either the existing symbol or the
1294 new symbol is weak, or if the old symbol is undefined. */
1297 || h
->root
.type
== bfd_link_hash_undefined
)
1298 *size_change_ok
= TRUE
;
1300 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
1301 symbol, respectively, appears to be a common symbol in a dynamic
1302 object. If a symbol appears in an uninitialized section, and is
1303 not weak, and is not a function, then it may be a common symbol
1304 which was resolved when the dynamic object was created. We want
1305 to treat such symbols specially, because they raise special
1306 considerations when setting the symbol size: if the symbol
1307 appears as a common symbol in a regular object, and the size in
1308 the regular object is larger, we must make sure that we use the
1309 larger size. This problematic case can always be avoided in C,
1310 but it must be handled correctly when using Fortran shared
1313 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
1314 likewise for OLDDYNCOMMON and OLDDEF.
1316 Note that this test is just a heuristic, and that it is quite
1317 possible to have an uninitialized symbol in a shared object which
1318 is really a definition, rather than a common symbol. This could
1319 lead to some minor confusion when the symbol really is a common
1320 symbol in some regular object. However, I think it will be
1326 && (sec
->flags
& SEC_ALLOC
) != 0
1327 && (sec
->flags
& SEC_LOAD
) == 0
1330 newdyncommon
= TRUE
;
1332 newdyncommon
= FALSE
;
1336 && h
->root
.type
== bfd_link_hash_defined
1338 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
1339 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
1342 olddyncommon
= TRUE
;
1344 olddyncommon
= FALSE
;
1346 /* We now know everything about the old and new symbols. We ask the
1347 backend to check if we can merge them. */
1348 if (bed
->merge_symbol
!= NULL
)
1350 if (!bed
->merge_symbol (h
, sym
, psec
, newdef
, olddef
, oldbfd
, oldsec
))
1355 /* If both the old and the new symbols look like common symbols in a
1356 dynamic object, set the size of the symbol to the larger of the
1361 && sym
->st_size
!= h
->size
)
1363 /* Since we think we have two common symbols, issue a multiple
1364 common warning if desired. Note that we only warn if the
1365 size is different. If the size is the same, we simply let
1366 the old symbol override the new one as normally happens with
1367 symbols defined in dynamic objects. */
1369 if (! ((*info
->callbacks
->multiple_common
)
1370 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1373 if (sym
->st_size
> h
->size
)
1374 h
->size
= sym
->st_size
;
1376 *size_change_ok
= TRUE
;
1379 /* If we are looking at a dynamic object, and we have found a
1380 definition, we need to see if the symbol was already defined by
1381 some other object. If so, we want to use the existing
1382 definition, and we do not want to report a multiple symbol
1383 definition error; we do this by clobbering *PSEC to be
1384 bfd_und_section_ptr.
1386 We treat a common symbol as a definition if the symbol in the
1387 shared library is a function, since common symbols always
1388 represent variables; this can cause confusion in principle, but
1389 any such confusion would seem to indicate an erroneous program or
1390 shared library. We also permit a common symbol in a regular
1391 object to override a weak symbol in a shared object. */
1396 || (h
->root
.type
== bfd_link_hash_common
1397 && (newweak
|| newfunc
))))
1401 newdyncommon
= FALSE
;
1403 *psec
= sec
= bfd_und_section_ptr
;
1404 *size_change_ok
= TRUE
;
1406 /* If we get here when the old symbol is a common symbol, then
1407 we are explicitly letting it override a weak symbol or
1408 function in a dynamic object, and we don't want to warn about
1409 a type change. If the old symbol is a defined symbol, a type
1410 change warning may still be appropriate. */
1412 if (h
->root
.type
== bfd_link_hash_common
)
1413 *type_change_ok
= TRUE
;
1416 /* Handle the special case of an old common symbol merging with a
1417 new symbol which looks like a common symbol in a shared object.
1418 We change *PSEC and *PVALUE to make the new symbol look like a
1419 common symbol, and let _bfd_generic_link_add_one_symbol do the
1423 && h
->root
.type
== bfd_link_hash_common
)
1427 newdyncommon
= FALSE
;
1428 *pvalue
= sym
->st_size
;
1429 *psec
= sec
= bed
->common_section (oldsec
);
1430 *size_change_ok
= TRUE
;
1433 /* Skip weak definitions of symbols that are already defined. */
1434 if (newdef
&& olddef
&& newweak
)
1436 /* Don't skip new non-IR weak syms. */
1437 if (!(oldbfd
!= NULL
1438 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1439 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1442 /* Merge st_other. If the symbol already has a dynamic index,
1443 but visibility says it should not be visible, turn it into a
1445 elf_merge_st_other (abfd
, h
, sym
, newdef
, newdyn
);
1446 if (h
->dynindx
!= -1)
1447 switch (ELF_ST_VISIBILITY (h
->other
))
1451 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1456 /* If the old symbol is from a dynamic object, and the new symbol is
1457 a definition which is not from a dynamic object, then the new
1458 symbol overrides the old symbol. Symbols from regular files
1459 always take precedence over symbols from dynamic objects, even if
1460 they are defined after the dynamic object in the link.
1462 As above, we again permit a common symbol in a regular object to
1463 override a definition in a shared object if the shared object
1464 symbol is a function or is weak. */
1469 || (bfd_is_com_section (sec
)
1470 && (oldweak
|| oldfunc
)))
1475 /* Change the hash table entry to undefined, and let
1476 _bfd_generic_link_add_one_symbol do the right thing with the
1479 h
->root
.type
= bfd_link_hash_undefined
;
1480 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1481 *size_change_ok
= TRUE
;
1484 olddyncommon
= FALSE
;
1486 /* We again permit a type change when a common symbol may be
1487 overriding a function. */
1489 if (bfd_is_com_section (sec
))
1493 /* If a common symbol overrides a function, make sure
1494 that it isn't defined dynamically nor has type
1497 h
->type
= STT_NOTYPE
;
1499 *type_change_ok
= TRUE
;
1502 if (hi
->root
.type
== bfd_link_hash_indirect
)
1505 /* This union may have been set to be non-NULL when this symbol
1506 was seen in a dynamic object. We must force the union to be
1507 NULL, so that it is correct for a regular symbol. */
1508 h
->verinfo
.vertree
= NULL
;
1511 /* Handle the special case of a new common symbol merging with an
1512 old symbol that looks like it might be a common symbol defined in
1513 a shared object. Note that we have already handled the case in
1514 which a new common symbol should simply override the definition
1515 in the shared library. */
1518 && bfd_is_com_section (sec
)
1521 /* It would be best if we could set the hash table entry to a
1522 common symbol, but we don't know what to use for the section
1523 or the alignment. */
1524 if (! ((*info
->callbacks
->multiple_common
)
1525 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1528 /* If the presumed common symbol in the dynamic object is
1529 larger, pretend that the new symbol has its size. */
1531 if (h
->size
> *pvalue
)
1534 /* We need to remember the alignment required by the symbol
1535 in the dynamic object. */
1536 BFD_ASSERT (pold_alignment
);
1537 *pold_alignment
= h
->root
.u
.def
.section
->alignment_power
;
1540 olddyncommon
= FALSE
;
1542 h
->root
.type
= bfd_link_hash_undefined
;
1543 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1545 *size_change_ok
= TRUE
;
1546 *type_change_ok
= TRUE
;
1548 if (hi
->root
.type
== bfd_link_hash_indirect
)
1551 h
->verinfo
.vertree
= NULL
;
1556 /* Handle the case where we had a versioned symbol in a dynamic
1557 library and now find a definition in a normal object. In this
1558 case, we make the versioned symbol point to the normal one. */
1559 flip
->root
.type
= h
->root
.type
;
1560 flip
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
1561 h
->root
.type
= bfd_link_hash_indirect
;
1562 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) flip
;
1563 (*bed
->elf_backend_copy_indirect_symbol
) (info
, flip
, h
);
1567 flip
->ref_dynamic
= 1;
1574 /* This function is called to create an indirect symbol from the
1575 default for the symbol with the default version if needed. The
1576 symbol is described by H, NAME, SYM, SEC, and VALUE. We
1577 set DYNSYM if the new indirect symbol is dynamic. */
1580 _bfd_elf_add_default_symbol (bfd
*abfd
,
1581 struct bfd_link_info
*info
,
1582 struct elf_link_hash_entry
*h
,
1584 Elf_Internal_Sym
*sym
,
1588 bfd_boolean
*dynsym
)
1590 bfd_boolean type_change_ok
;
1591 bfd_boolean size_change_ok
;
1594 struct elf_link_hash_entry
*hi
;
1595 struct bfd_link_hash_entry
*bh
;
1596 const struct elf_backend_data
*bed
;
1597 bfd_boolean collect
;
1598 bfd_boolean dynamic
;
1599 bfd_boolean override
;
1601 size_t len
, shortlen
;
1604 /* If this symbol has a version, and it is the default version, we
1605 create an indirect symbol from the default name to the fully
1606 decorated name. This will cause external references which do not
1607 specify a version to be bound to this version of the symbol. */
1608 p
= strchr (name
, ELF_VER_CHR
);
1609 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
1612 bed
= get_elf_backend_data (abfd
);
1613 collect
= bed
->collect
;
1614 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
1616 shortlen
= p
- name
;
1617 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
1618 if (shortname
== NULL
)
1620 memcpy (shortname
, name
, shortlen
);
1621 shortname
[shortlen
] = '\0';
1623 /* We are going to create a new symbol. Merge it with any existing
1624 symbol with this name. For the purposes of the merge, act as
1625 though we were defining the symbol we just defined, although we
1626 actually going to define an indirect symbol. */
1627 type_change_ok
= FALSE
;
1628 size_change_ok
= FALSE
;
1630 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1631 &hi
, poldbfd
, NULL
, NULL
, &skip
, &override
,
1632 &type_change_ok
, &size_change_ok
))
1641 if (! (_bfd_generic_link_add_one_symbol
1642 (info
, abfd
, shortname
, BSF_INDIRECT
, bfd_ind_section_ptr
,
1643 0, name
, FALSE
, collect
, &bh
)))
1645 hi
= (struct elf_link_hash_entry
*) bh
;
1649 /* In this case the symbol named SHORTNAME is overriding the
1650 indirect symbol we want to add. We were planning on making
1651 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
1652 is the name without a version. NAME is the fully versioned
1653 name, and it is the default version.
1655 Overriding means that we already saw a definition for the
1656 symbol SHORTNAME in a regular object, and it is overriding
1657 the symbol defined in the dynamic object.
1659 When this happens, we actually want to change NAME, the
1660 symbol we just added, to refer to SHORTNAME. This will cause
1661 references to NAME in the shared object to become references
1662 to SHORTNAME in the regular object. This is what we expect
1663 when we override a function in a shared object: that the
1664 references in the shared object will be mapped to the
1665 definition in the regular object. */
1667 while (hi
->root
.type
== bfd_link_hash_indirect
1668 || hi
->root
.type
== bfd_link_hash_warning
)
1669 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1671 h
->root
.type
= bfd_link_hash_indirect
;
1672 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1676 hi
->ref_dynamic
= 1;
1680 if (! bfd_elf_link_record_dynamic_symbol (info
, hi
))
1685 /* Now set HI to H, so that the following code will set the
1686 other fields correctly. */
1690 /* Check if HI is a warning symbol. */
1691 if (hi
->root
.type
== bfd_link_hash_warning
)
1692 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1694 /* If there is a duplicate definition somewhere, then HI may not
1695 point to an indirect symbol. We will have reported an error to
1696 the user in that case. */
1698 if (hi
->root
.type
== bfd_link_hash_indirect
)
1700 struct elf_link_hash_entry
*ht
;
1702 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1703 (*bed
->elf_backend_copy_indirect_symbol
) (info
, ht
, hi
);
1705 /* A reference to the SHORTNAME symbol from a dynamic library
1706 will be satisfied by the versioned symbol at runtime. In
1707 effect, we have a reference to the versioned symbol. */
1708 ht
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
1709 hi
->dynamic_def
|= ht
->dynamic_def
;
1711 /* See if the new flags lead us to realize that the symbol must
1717 if (! info
->executable
1724 if (hi
->ref_regular
)
1730 /* We also need to define an indirection from the nondefault version
1734 len
= strlen (name
);
1735 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, len
);
1736 if (shortname
== NULL
)
1738 memcpy (shortname
, name
, shortlen
);
1739 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
1741 /* Once again, merge with any existing symbol. */
1742 type_change_ok
= FALSE
;
1743 size_change_ok
= FALSE
;
1745 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &tmp_sec
, &value
,
1746 &hi
, NULL
, NULL
, NULL
, &skip
, &override
,
1747 &type_change_ok
, &size_change_ok
))
1755 /* Here SHORTNAME is a versioned name, so we don't expect to see
1756 the type of override we do in the case above unless it is
1757 overridden by a versioned definition. */
1758 if (hi
->root
.type
!= bfd_link_hash_defined
1759 && hi
->root
.type
!= bfd_link_hash_defweak
)
1760 (*_bfd_error_handler
)
1761 (_("%B: unexpected redefinition of indirect versioned symbol `%s'"),
1767 if (! (_bfd_generic_link_add_one_symbol
1768 (info
, abfd
, shortname
, BSF_INDIRECT
,
1769 bfd_ind_section_ptr
, 0, name
, FALSE
, collect
, &bh
)))
1771 hi
= (struct elf_link_hash_entry
*) bh
;
1773 /* If there is a duplicate definition somewhere, then HI may not
1774 point to an indirect symbol. We will have reported an error
1775 to the user in that case. */
1777 if (hi
->root
.type
== bfd_link_hash_indirect
)
1779 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
1780 h
->ref_dynamic_nonweak
|= hi
->ref_dynamic_nonweak
;
1781 hi
->dynamic_def
|= h
->dynamic_def
;
1783 /* See if the new flags lead us to realize that the symbol
1789 if (! info
->executable
1795 if (hi
->ref_regular
)
1805 /* This routine is used to export all defined symbols into the dynamic
1806 symbol table. It is called via elf_link_hash_traverse. */
1809 _bfd_elf_export_symbol (struct elf_link_hash_entry
*h
, void *data
)
1811 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
1813 /* Ignore indirect symbols. These are added by the versioning code. */
1814 if (h
->root
.type
== bfd_link_hash_indirect
)
1817 /* Ignore this if we won't export it. */
1818 if (!eif
->info
->export_dynamic
&& !h
->dynamic
)
1821 if (h
->dynindx
== -1
1822 && (h
->def_regular
|| h
->ref_regular
)
1823 && ! bfd_hide_sym_by_version (eif
->info
->version_info
,
1824 h
->root
.root
.string
))
1826 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
1836 /* Look through the symbols which are defined in other shared
1837 libraries and referenced here. Update the list of version
1838 dependencies. This will be put into the .gnu.version_r section.
1839 This function is called via elf_link_hash_traverse. */
1842 _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry
*h
,
1845 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
1846 Elf_Internal_Verneed
*t
;
1847 Elf_Internal_Vernaux
*a
;
1850 /* We only care about symbols defined in shared objects with version
1855 || h
->verinfo
.verdef
== NULL
)
1858 /* See if we already know about this version. */
1859 for (t
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1863 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
1866 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1867 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
1873 /* This is a new version. Add it to tree we are building. */
1878 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1881 rinfo
->failed
= TRUE
;
1885 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
1886 t
->vn_nextref
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1887 elf_tdata (rinfo
->info
->output_bfd
)->verref
= t
;
1891 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1894 rinfo
->failed
= TRUE
;
1898 /* Note that we are copying a string pointer here, and testing it
1899 above. If bfd_elf_string_from_elf_section is ever changed to
1900 discard the string data when low in memory, this will have to be
1902 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
1904 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
1905 a
->vna_nextptr
= t
->vn_auxptr
;
1907 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
1910 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
1917 /* Figure out appropriate versions for all the symbols. We may not
1918 have the version number script until we have read all of the input
1919 files, so until that point we don't know which symbols should be
1920 local. This function is called via elf_link_hash_traverse. */
1923 _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry
*h
, void *data
)
1925 struct elf_info_failed
*sinfo
;
1926 struct bfd_link_info
*info
;
1927 const struct elf_backend_data
*bed
;
1928 struct elf_info_failed eif
;
1932 sinfo
= (struct elf_info_failed
*) data
;
1935 /* Fix the symbol flags. */
1938 if (! _bfd_elf_fix_symbol_flags (h
, &eif
))
1941 sinfo
->failed
= TRUE
;
1945 /* We only need version numbers for symbols defined in regular
1947 if (!h
->def_regular
)
1950 bed
= get_elf_backend_data (info
->output_bfd
);
1951 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
1952 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
1954 struct bfd_elf_version_tree
*t
;
1959 /* There are two consecutive ELF_VER_CHR characters if this is
1960 not a hidden symbol. */
1962 if (*p
== ELF_VER_CHR
)
1968 /* If there is no version string, we can just return out. */
1976 /* Look for the version. If we find it, it is no longer weak. */
1977 for (t
= sinfo
->info
->version_info
; t
!= NULL
; t
= t
->next
)
1979 if (strcmp (t
->name
, p
) == 0)
1983 struct bfd_elf_version_expr
*d
;
1985 len
= p
- h
->root
.root
.string
;
1986 alc
= (char *) bfd_malloc (len
);
1989 sinfo
->failed
= TRUE
;
1992 memcpy (alc
, h
->root
.root
.string
, len
- 1);
1993 alc
[len
- 1] = '\0';
1994 if (alc
[len
- 2] == ELF_VER_CHR
)
1995 alc
[len
- 2] = '\0';
1997 h
->verinfo
.vertree
= t
;
2001 if (t
->globals
.list
!= NULL
)
2002 d
= (*t
->match
) (&t
->globals
, NULL
, alc
);
2004 /* See if there is anything to force this symbol to
2006 if (d
== NULL
&& t
->locals
.list
!= NULL
)
2008 d
= (*t
->match
) (&t
->locals
, NULL
, alc
);
2011 && ! info
->export_dynamic
)
2012 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2020 /* If we are building an application, we need to create a
2021 version node for this version. */
2022 if (t
== NULL
&& info
->executable
)
2024 struct bfd_elf_version_tree
**pp
;
2027 /* If we aren't going to export this symbol, we don't need
2028 to worry about it. */
2029 if (h
->dynindx
== -1)
2033 t
= (struct bfd_elf_version_tree
*) bfd_zalloc (info
->output_bfd
, amt
);
2036 sinfo
->failed
= TRUE
;
2041 t
->name_indx
= (unsigned int) -1;
2045 /* Don't count anonymous version tag. */
2046 if (sinfo
->info
->version_info
!= NULL
2047 && sinfo
->info
->version_info
->vernum
== 0)
2049 for (pp
= &sinfo
->info
->version_info
;
2053 t
->vernum
= version_index
;
2057 h
->verinfo
.vertree
= t
;
2061 /* We could not find the version for a symbol when
2062 generating a shared archive. Return an error. */
2063 (*_bfd_error_handler
)
2064 (_("%B: version node not found for symbol %s"),
2065 info
->output_bfd
, h
->root
.root
.string
);
2066 bfd_set_error (bfd_error_bad_value
);
2067 sinfo
->failed
= TRUE
;
2075 /* If we don't have a version for this symbol, see if we can find
2077 if (h
->verinfo
.vertree
== NULL
&& sinfo
->info
->version_info
!= NULL
)
2082 = bfd_find_version_for_sym (sinfo
->info
->version_info
,
2083 h
->root
.root
.string
, &hide
);
2084 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2085 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2091 /* Read and swap the relocs from the section indicated by SHDR. This
2092 may be either a REL or a RELA section. The relocations are
2093 translated into RELA relocations and stored in INTERNAL_RELOCS,
2094 which should have already been allocated to contain enough space.
2095 The EXTERNAL_RELOCS are a buffer where the external form of the
2096 relocations should be stored.
2098 Returns FALSE if something goes wrong. */
2101 elf_link_read_relocs_from_section (bfd
*abfd
,
2103 Elf_Internal_Shdr
*shdr
,
2104 void *external_relocs
,
2105 Elf_Internal_Rela
*internal_relocs
)
2107 const struct elf_backend_data
*bed
;
2108 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2109 const bfd_byte
*erela
;
2110 const bfd_byte
*erelaend
;
2111 Elf_Internal_Rela
*irela
;
2112 Elf_Internal_Shdr
*symtab_hdr
;
2115 /* Position ourselves at the start of the section. */
2116 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2119 /* Read the relocations. */
2120 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2123 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2124 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
2126 bed
= get_elf_backend_data (abfd
);
2128 /* Convert the external relocations to the internal format. */
2129 if (shdr
->sh_entsize
== bed
->s
->sizeof_rel
)
2130 swap_in
= bed
->s
->swap_reloc_in
;
2131 else if (shdr
->sh_entsize
== bed
->s
->sizeof_rela
)
2132 swap_in
= bed
->s
->swap_reloca_in
;
2135 bfd_set_error (bfd_error_wrong_format
);
2139 erela
= (const bfd_byte
*) external_relocs
;
2140 erelaend
= erela
+ shdr
->sh_size
;
2141 irela
= internal_relocs
;
2142 while (erela
< erelaend
)
2146 (*swap_in
) (abfd
, erela
, irela
);
2147 r_symndx
= ELF32_R_SYM (irela
->r_info
);
2148 if (bed
->s
->arch_size
== 64)
2152 if ((size_t) r_symndx
>= nsyms
)
2154 (*_bfd_error_handler
)
2155 (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)"
2156 " for offset 0x%lx in section `%A'"),
2158 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2159 bfd_set_error (bfd_error_bad_value
);
2163 else if (r_symndx
!= STN_UNDEF
)
2165 (*_bfd_error_handler
)
2166 (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'"
2167 " when the object file has no symbol table"),
2169 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2170 bfd_set_error (bfd_error_bad_value
);
2173 irela
+= bed
->s
->int_rels_per_ext_rel
;
2174 erela
+= shdr
->sh_entsize
;
2180 /* Read and swap the relocs for a section O. They may have been
2181 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2182 not NULL, they are used as buffers to read into. They are known to
2183 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2184 the return value is allocated using either malloc or bfd_alloc,
2185 according to the KEEP_MEMORY argument. If O has two relocation
2186 sections (both REL and RELA relocations), then the REL_HDR
2187 relocations will appear first in INTERNAL_RELOCS, followed by the
2188 RELA_HDR relocations. */
2191 _bfd_elf_link_read_relocs (bfd
*abfd
,
2193 void *external_relocs
,
2194 Elf_Internal_Rela
*internal_relocs
,
2195 bfd_boolean keep_memory
)
2197 void *alloc1
= NULL
;
2198 Elf_Internal_Rela
*alloc2
= NULL
;
2199 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2200 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
2201 Elf_Internal_Rela
*internal_rela_relocs
;
2203 if (esdo
->relocs
!= NULL
)
2204 return esdo
->relocs
;
2206 if (o
->reloc_count
== 0)
2209 if (internal_relocs
== NULL
)
2213 size
= o
->reloc_count
;
2214 size
*= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
2216 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2218 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2219 if (internal_relocs
== NULL
)
2223 if (external_relocs
== NULL
)
2225 bfd_size_type size
= 0;
2228 size
+= esdo
->rel
.hdr
->sh_size
;
2230 size
+= esdo
->rela
.hdr
->sh_size
;
2232 alloc1
= bfd_malloc (size
);
2235 external_relocs
= alloc1
;
2238 internal_rela_relocs
= internal_relocs
;
2241 if (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rel
.hdr
,
2245 external_relocs
= (((bfd_byte
*) external_relocs
)
2246 + esdo
->rel
.hdr
->sh_size
);
2247 internal_rela_relocs
+= (NUM_SHDR_ENTRIES (esdo
->rel
.hdr
)
2248 * bed
->s
->int_rels_per_ext_rel
);
2252 && (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rela
.hdr
,
2254 internal_rela_relocs
)))
2257 /* Cache the results for next time, if we can. */
2259 esdo
->relocs
= internal_relocs
;
2264 /* Don't free alloc2, since if it was allocated we are passing it
2265 back (under the name of internal_relocs). */
2267 return internal_relocs
;
2275 bfd_release (abfd
, alloc2
);
2282 /* Compute the size of, and allocate space for, REL_HDR which is the
2283 section header for a section containing relocations for O. */
2286 _bfd_elf_link_size_reloc_section (bfd
*abfd
,
2287 struct bfd_elf_section_reloc_data
*reldata
)
2289 Elf_Internal_Shdr
*rel_hdr
= reldata
->hdr
;
2291 /* That allows us to calculate the size of the section. */
2292 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reldata
->count
;
2294 /* The contents field must last into write_object_contents, so we
2295 allocate it with bfd_alloc rather than malloc. Also since we
2296 cannot be sure that the contents will actually be filled in,
2297 we zero the allocated space. */
2298 rel_hdr
->contents
= (unsigned char *) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
2299 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
2302 if (reldata
->hashes
== NULL
&& reldata
->count
)
2304 struct elf_link_hash_entry
**p
;
2306 p
= (struct elf_link_hash_entry
**)
2307 bfd_zmalloc (reldata
->count
* sizeof (struct elf_link_hash_entry
*));
2311 reldata
->hashes
= p
;
2317 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
2318 originated from the section given by INPUT_REL_HDR) to the
2322 _bfd_elf_link_output_relocs (bfd
*output_bfd
,
2323 asection
*input_section
,
2324 Elf_Internal_Shdr
*input_rel_hdr
,
2325 Elf_Internal_Rela
*internal_relocs
,
2326 struct elf_link_hash_entry
**rel_hash
2329 Elf_Internal_Rela
*irela
;
2330 Elf_Internal_Rela
*irelaend
;
2332 struct bfd_elf_section_reloc_data
*output_reldata
;
2333 asection
*output_section
;
2334 const struct elf_backend_data
*bed
;
2335 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2336 struct bfd_elf_section_data
*esdo
;
2338 output_section
= input_section
->output_section
;
2340 bed
= get_elf_backend_data (output_bfd
);
2341 esdo
= elf_section_data (output_section
);
2342 if (esdo
->rel
.hdr
&& esdo
->rel
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2344 output_reldata
= &esdo
->rel
;
2345 swap_out
= bed
->s
->swap_reloc_out
;
2347 else if (esdo
->rela
.hdr
2348 && esdo
->rela
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2350 output_reldata
= &esdo
->rela
;
2351 swap_out
= bed
->s
->swap_reloca_out
;
2355 (*_bfd_error_handler
)
2356 (_("%B: relocation size mismatch in %B section %A"),
2357 output_bfd
, input_section
->owner
, input_section
);
2358 bfd_set_error (bfd_error_wrong_format
);
2362 erel
= output_reldata
->hdr
->contents
;
2363 erel
+= output_reldata
->count
* input_rel_hdr
->sh_entsize
;
2364 irela
= internal_relocs
;
2365 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
2366 * bed
->s
->int_rels_per_ext_rel
);
2367 while (irela
< irelaend
)
2369 (*swap_out
) (output_bfd
, irela
, erel
);
2370 irela
+= bed
->s
->int_rels_per_ext_rel
;
2371 erel
+= input_rel_hdr
->sh_entsize
;
2374 /* Bump the counter, so that we know where to add the next set of
2376 output_reldata
->count
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
2381 /* Make weak undefined symbols in PIE dynamic. */
2384 _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info
*info
,
2385 struct elf_link_hash_entry
*h
)
2389 && h
->root
.type
== bfd_link_hash_undefweak
)
2390 return bfd_elf_link_record_dynamic_symbol (info
, h
);
2395 /* Fix up the flags for a symbol. This handles various cases which
2396 can only be fixed after all the input files are seen. This is
2397 currently called by both adjust_dynamic_symbol and
2398 assign_sym_version, which is unnecessary but perhaps more robust in
2399 the face of future changes. */
2402 _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry
*h
,
2403 struct elf_info_failed
*eif
)
2405 const struct elf_backend_data
*bed
;
2407 /* If this symbol was mentioned in a non-ELF file, try to set
2408 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2409 permit a non-ELF file to correctly refer to a symbol defined in
2410 an ELF dynamic object. */
2413 while (h
->root
.type
== bfd_link_hash_indirect
)
2414 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2416 if (h
->root
.type
!= bfd_link_hash_defined
2417 && h
->root
.type
!= bfd_link_hash_defweak
)
2420 h
->ref_regular_nonweak
= 1;
2424 if (h
->root
.u
.def
.section
->owner
!= NULL
2425 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2426 == bfd_target_elf_flavour
))
2429 h
->ref_regular_nonweak
= 1;
2435 if (h
->dynindx
== -1
2439 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2448 /* Unfortunately, NON_ELF is only correct if the symbol
2449 was first seen in a non-ELF file. Fortunately, if the symbol
2450 was first seen in an ELF file, we're probably OK unless the
2451 symbol was defined in a non-ELF file. Catch that case here.
2452 FIXME: We're still in trouble if the symbol was first seen in
2453 a dynamic object, and then later in a non-ELF regular object. */
2454 if ((h
->root
.type
== bfd_link_hash_defined
2455 || h
->root
.type
== bfd_link_hash_defweak
)
2457 && (h
->root
.u
.def
.section
->owner
!= NULL
2458 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2459 != bfd_target_elf_flavour
)
2460 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
2461 && !h
->def_dynamic
)))
2465 /* Backend specific symbol fixup. */
2466 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
2467 if (bed
->elf_backend_fixup_symbol
2468 && !(*bed
->elf_backend_fixup_symbol
) (eif
->info
, h
))
2471 /* If this is a final link, and the symbol was defined as a common
2472 symbol in a regular object file, and there was no definition in
2473 any dynamic object, then the linker will have allocated space for
2474 the symbol in a common section but the DEF_REGULAR
2475 flag will not have been set. */
2476 if (h
->root
.type
== bfd_link_hash_defined
2480 && (h
->root
.u
.def
.section
->owner
->flags
& (DYNAMIC
| BFD_PLUGIN
)) == 0)
2483 /* If -Bsymbolic was used (which means to bind references to global
2484 symbols to the definition within the shared object), and this
2485 symbol was defined in a regular object, then it actually doesn't
2486 need a PLT entry. Likewise, if the symbol has non-default
2487 visibility. If the symbol has hidden or internal visibility, we
2488 will force it local. */
2490 && eif
->info
->shared
2491 && is_elf_hash_table (eif
->info
->hash
)
2492 && (SYMBOLIC_BIND (eif
->info
, h
)
2493 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2496 bfd_boolean force_local
;
2498 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
2499 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
2500 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
2503 /* If a weak undefined symbol has non-default visibility, we also
2504 hide it from the dynamic linker. */
2505 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2506 && h
->root
.type
== bfd_link_hash_undefweak
)
2507 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2509 /* If this is a weak defined symbol in a dynamic object, and we know
2510 the real definition in the dynamic object, copy interesting flags
2511 over to the real definition. */
2512 if (h
->u
.weakdef
!= NULL
)
2514 /* If the real definition is defined by a regular object file,
2515 don't do anything special. See the longer description in
2516 _bfd_elf_adjust_dynamic_symbol, below. */
2517 if (h
->u
.weakdef
->def_regular
)
2518 h
->u
.weakdef
= NULL
;
2521 struct elf_link_hash_entry
*weakdef
= h
->u
.weakdef
;
2523 while (h
->root
.type
== bfd_link_hash_indirect
)
2524 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2526 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2527 || h
->root
.type
== bfd_link_hash_defweak
);
2528 BFD_ASSERT (weakdef
->def_dynamic
);
2529 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
2530 || weakdef
->root
.type
== bfd_link_hash_defweak
);
2531 (*bed
->elf_backend_copy_indirect_symbol
) (eif
->info
, weakdef
, h
);
2538 /* Make the backend pick a good value for a dynamic symbol. This is
2539 called via elf_link_hash_traverse, and also calls itself
2543 _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry
*h
, void *data
)
2545 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2547 const struct elf_backend_data
*bed
;
2549 if (! is_elf_hash_table (eif
->info
->hash
))
2552 /* Ignore indirect symbols. These are added by the versioning code. */
2553 if (h
->root
.type
== bfd_link_hash_indirect
)
2556 /* Fix the symbol flags. */
2557 if (! _bfd_elf_fix_symbol_flags (h
, eif
))
2560 /* If this symbol does not require a PLT entry, and it is not
2561 defined by a dynamic object, or is not referenced by a regular
2562 object, ignore it. We do have to handle a weak defined symbol,
2563 even if no regular object refers to it, if we decided to add it
2564 to the dynamic symbol table. FIXME: Do we normally need to worry
2565 about symbols which are defined by one dynamic object and
2566 referenced by another one? */
2568 && h
->type
!= STT_GNU_IFUNC
2572 && (h
->u
.weakdef
== NULL
|| h
->u
.weakdef
->dynindx
== -1))))
2574 h
->plt
= elf_hash_table (eif
->info
)->init_plt_offset
;
2578 /* If we've already adjusted this symbol, don't do it again. This
2579 can happen via a recursive call. */
2580 if (h
->dynamic_adjusted
)
2583 /* Don't look at this symbol again. Note that we must set this
2584 after checking the above conditions, because we may look at a
2585 symbol once, decide not to do anything, and then get called
2586 recursively later after REF_REGULAR is set below. */
2587 h
->dynamic_adjusted
= 1;
2589 /* If this is a weak definition, and we know a real definition, and
2590 the real symbol is not itself defined by a regular object file,
2591 then get a good value for the real definition. We handle the
2592 real symbol first, for the convenience of the backend routine.
2594 Note that there is a confusing case here. If the real definition
2595 is defined by a regular object file, we don't get the real symbol
2596 from the dynamic object, but we do get the weak symbol. If the
2597 processor backend uses a COPY reloc, then if some routine in the
2598 dynamic object changes the real symbol, we will not see that
2599 change in the corresponding weak symbol. This is the way other
2600 ELF linkers work as well, and seems to be a result of the shared
2603 I will clarify this issue. Most SVR4 shared libraries define the
2604 variable _timezone and define timezone as a weak synonym. The
2605 tzset call changes _timezone. If you write
2606 extern int timezone;
2608 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
2609 you might expect that, since timezone is a synonym for _timezone,
2610 the same number will print both times. However, if the processor
2611 backend uses a COPY reloc, then actually timezone will be copied
2612 into your process image, and, since you define _timezone
2613 yourself, _timezone will not. Thus timezone and _timezone will
2614 wind up at different memory locations. The tzset call will set
2615 _timezone, leaving timezone unchanged. */
2617 if (h
->u
.weakdef
!= NULL
)
2619 /* If we get to this point, there is an implicit reference to
2620 H->U.WEAKDEF by a regular object file via the weak symbol H. */
2621 h
->u
.weakdef
->ref_regular
= 1;
2623 /* Ensure that the backend adjust_dynamic_symbol function sees
2624 H->U.WEAKDEF before H by recursively calling ourselves. */
2625 if (! _bfd_elf_adjust_dynamic_symbol (h
->u
.weakdef
, eif
))
2629 /* If a symbol has no type and no size and does not require a PLT
2630 entry, then we are probably about to do the wrong thing here: we
2631 are probably going to create a COPY reloc for an empty object.
2632 This case can arise when a shared object is built with assembly
2633 code, and the assembly code fails to set the symbol type. */
2635 && h
->type
== STT_NOTYPE
2637 (*_bfd_error_handler
)
2638 (_("warning: type and size of dynamic symbol `%s' are not defined"),
2639 h
->root
.root
.string
);
2641 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
2642 bed
= get_elf_backend_data (dynobj
);
2644 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
2653 /* Adjust the dynamic symbol, H, for copy in the dynamic bss section,
2657 _bfd_elf_adjust_dynamic_copy (struct elf_link_hash_entry
*h
,
2660 unsigned int power_of_two
;
2662 asection
*sec
= h
->root
.u
.def
.section
;
2664 /* The section aligment of definition is the maximum alignment
2665 requirement of symbols defined in the section. Since we don't
2666 know the symbol alignment requirement, we start with the
2667 maximum alignment and check low bits of the symbol address
2668 for the minimum alignment. */
2669 power_of_two
= bfd_get_section_alignment (sec
->owner
, sec
);
2670 mask
= ((bfd_vma
) 1 << power_of_two
) - 1;
2671 while ((h
->root
.u
.def
.value
& mask
) != 0)
2677 if (power_of_two
> bfd_get_section_alignment (dynbss
->owner
,
2680 /* Adjust the section alignment if needed. */
2681 if (! bfd_set_section_alignment (dynbss
->owner
, dynbss
,
2686 /* We make sure that the symbol will be aligned properly. */
2687 dynbss
->size
= BFD_ALIGN (dynbss
->size
, mask
+ 1);
2689 /* Define the symbol as being at this point in DYNBSS. */
2690 h
->root
.u
.def
.section
= dynbss
;
2691 h
->root
.u
.def
.value
= dynbss
->size
;
2693 /* Increment the size of DYNBSS to make room for the symbol. */
2694 dynbss
->size
+= h
->size
;
2699 /* Adjust all external symbols pointing into SEC_MERGE sections
2700 to reflect the object merging within the sections. */
2703 _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry
*h
, void *data
)
2707 if ((h
->root
.type
== bfd_link_hash_defined
2708 || h
->root
.type
== bfd_link_hash_defweak
)
2709 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
2710 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
2712 bfd
*output_bfd
= (bfd
*) data
;
2714 h
->root
.u
.def
.value
=
2715 _bfd_merged_section_offset (output_bfd
,
2716 &h
->root
.u
.def
.section
,
2717 elf_section_data (sec
)->sec_info
,
2718 h
->root
.u
.def
.value
);
2724 /* Returns false if the symbol referred to by H should be considered
2725 to resolve local to the current module, and true if it should be
2726 considered to bind dynamically. */
2729 _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
2730 struct bfd_link_info
*info
,
2731 bfd_boolean not_local_protected
)
2733 bfd_boolean binding_stays_local_p
;
2734 const struct elf_backend_data
*bed
;
2735 struct elf_link_hash_table
*hash_table
;
2740 while (h
->root
.type
== bfd_link_hash_indirect
2741 || h
->root
.type
== bfd_link_hash_warning
)
2742 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2744 /* If it was forced local, then clearly it's not dynamic. */
2745 if (h
->dynindx
== -1)
2747 if (h
->forced_local
)
2750 /* Identify the cases where name binding rules say that a
2751 visible symbol resolves locally. */
2752 binding_stays_local_p
= info
->executable
|| SYMBOLIC_BIND (info
, h
);
2754 switch (ELF_ST_VISIBILITY (h
->other
))
2761 hash_table
= elf_hash_table (info
);
2762 if (!is_elf_hash_table (hash_table
))
2765 bed
= get_elf_backend_data (hash_table
->dynobj
);
2767 /* Proper resolution for function pointer equality may require
2768 that these symbols perhaps be resolved dynamically, even though
2769 we should be resolving them to the current module. */
2770 if (!not_local_protected
|| !bed
->is_function_type (h
->type
))
2771 binding_stays_local_p
= TRUE
;
2778 /* If it isn't defined locally, then clearly it's dynamic. */
2779 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2782 /* Otherwise, the symbol is dynamic if binding rules don't tell
2783 us that it remains local. */
2784 return !binding_stays_local_p
;
2787 /* Return true if the symbol referred to by H should be considered
2788 to resolve local to the current module, and false otherwise. Differs
2789 from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of
2790 undefined symbols. The two functions are virtually identical except
2791 for the place where forced_local and dynindx == -1 are tested. If
2792 either of those tests are true, _bfd_elf_dynamic_symbol_p will say
2793 the symbol is local, while _bfd_elf_symbol_refs_local_p will say
2794 the symbol is local only for defined symbols.
2795 It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as
2796 !_bfd_elf_symbol_refs_local_p, except that targets differ in their
2797 treatment of undefined weak symbols. For those that do not make
2798 undefined weak symbols dynamic, both functions may return false. */
2801 _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry
*h
,
2802 struct bfd_link_info
*info
,
2803 bfd_boolean local_protected
)
2805 const struct elf_backend_data
*bed
;
2806 struct elf_link_hash_table
*hash_table
;
2808 /* If it's a local sym, of course we resolve locally. */
2812 /* STV_HIDDEN or STV_INTERNAL ones must be local. */
2813 if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
2814 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
2817 /* Common symbols that become definitions don't get the DEF_REGULAR
2818 flag set, so test it first, and don't bail out. */
2819 if (ELF_COMMON_DEF_P (h
))
2821 /* If we don't have a definition in a regular file, then we can't
2822 resolve locally. The sym is either undefined or dynamic. */
2823 else if (!h
->def_regular
)
2826 /* Forced local symbols resolve locally. */
2827 if (h
->forced_local
)
2830 /* As do non-dynamic symbols. */
2831 if (h
->dynindx
== -1)
2834 /* At this point, we know the symbol is defined and dynamic. In an
2835 executable it must resolve locally, likewise when building symbolic
2836 shared libraries. */
2837 if (info
->executable
|| SYMBOLIC_BIND (info
, h
))
2840 /* Now deal with defined dynamic symbols in shared libraries. Ones
2841 with default visibility might not resolve locally. */
2842 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
2845 hash_table
= elf_hash_table (info
);
2846 if (!is_elf_hash_table (hash_table
))
2849 bed
= get_elf_backend_data (hash_table
->dynobj
);
2851 /* STV_PROTECTED non-function symbols are local. */
2852 if (!bed
->is_function_type (h
->type
))
2855 /* Function pointer equality tests may require that STV_PROTECTED
2856 symbols be treated as dynamic symbols. If the address of a
2857 function not defined in an executable is set to that function's
2858 plt entry in the executable, then the address of the function in
2859 a shared library must also be the plt entry in the executable. */
2860 return local_protected
;
2863 /* Caches some TLS segment info, and ensures that the TLS segment vma is
2864 aligned. Returns the first TLS output section. */
2866 struct bfd_section
*
2867 _bfd_elf_tls_setup (bfd
*obfd
, struct bfd_link_info
*info
)
2869 struct bfd_section
*sec
, *tls
;
2870 unsigned int align
= 0;
2872 for (sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2873 if ((sec
->flags
& SEC_THREAD_LOCAL
) != 0)
2877 for (; sec
!= NULL
&& (sec
->flags
& SEC_THREAD_LOCAL
) != 0; sec
= sec
->next
)
2878 if (sec
->alignment_power
> align
)
2879 align
= sec
->alignment_power
;
2881 elf_hash_table (info
)->tls_sec
= tls
;
2883 /* Ensure the alignment of the first section is the largest alignment,
2884 so that the tls segment starts aligned. */
2886 tls
->alignment_power
= align
;
2891 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
2893 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
2894 Elf_Internal_Sym
*sym
)
2896 const struct elf_backend_data
*bed
;
2898 /* Local symbols do not count, but target specific ones might. */
2899 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
2900 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
2903 bed
= get_elf_backend_data (abfd
);
2904 /* Function symbols do not count. */
2905 if (bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)))
2908 /* If the section is undefined, then so is the symbol. */
2909 if (sym
->st_shndx
== SHN_UNDEF
)
2912 /* If the symbol is defined in the common section, then
2913 it is a common definition and so does not count. */
2914 if (bed
->common_definition (sym
))
2917 /* If the symbol is in a target specific section then we
2918 must rely upon the backend to tell us what it is. */
2919 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
2920 /* FIXME - this function is not coded yet:
2922 return _bfd_is_global_symbol_definition (abfd, sym);
2924 Instead for now assume that the definition is not global,
2925 Even if this is wrong, at least the linker will behave
2926 in the same way that it used to do. */
2932 /* Search the symbol table of the archive element of the archive ABFD
2933 whose archive map contains a mention of SYMDEF, and determine if
2934 the symbol is defined in this element. */
2936 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
2938 Elf_Internal_Shdr
* hdr
;
2939 bfd_size_type symcount
;
2940 bfd_size_type extsymcount
;
2941 bfd_size_type extsymoff
;
2942 Elf_Internal_Sym
*isymbuf
;
2943 Elf_Internal_Sym
*isym
;
2944 Elf_Internal_Sym
*isymend
;
2947 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
2951 if (! bfd_check_format (abfd
, bfd_object
))
2954 /* If we have already included the element containing this symbol in the
2955 link then we do not need to include it again. Just claim that any symbol
2956 it contains is not a definition, so that our caller will not decide to
2957 (re)include this element. */
2958 if (abfd
->archive_pass
)
2961 /* Select the appropriate symbol table. */
2962 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
2963 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2965 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
2967 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
2969 /* The sh_info field of the symtab header tells us where the
2970 external symbols start. We don't care about the local symbols. */
2971 if (elf_bad_symtab (abfd
))
2973 extsymcount
= symcount
;
2978 extsymcount
= symcount
- hdr
->sh_info
;
2979 extsymoff
= hdr
->sh_info
;
2982 if (extsymcount
== 0)
2985 /* Read in the symbol table. */
2986 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
2988 if (isymbuf
== NULL
)
2991 /* Scan the symbol table looking for SYMDEF. */
2993 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
2997 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3002 if (strcmp (name
, symdef
->name
) == 0)
3004 result
= is_global_data_symbol_definition (abfd
, isym
);
3014 /* Add an entry to the .dynamic table. */
3017 _bfd_elf_add_dynamic_entry (struct bfd_link_info
*info
,
3021 struct elf_link_hash_table
*hash_table
;
3022 const struct elf_backend_data
*bed
;
3024 bfd_size_type newsize
;
3025 bfd_byte
*newcontents
;
3026 Elf_Internal_Dyn dyn
;
3028 hash_table
= elf_hash_table (info
);
3029 if (! is_elf_hash_table (hash_table
))
3032 bed
= get_elf_backend_data (hash_table
->dynobj
);
3033 s
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3034 BFD_ASSERT (s
!= NULL
);
3036 newsize
= s
->size
+ bed
->s
->sizeof_dyn
;
3037 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
3038 if (newcontents
== NULL
)
3042 dyn
.d_un
.d_val
= val
;
3043 bed
->s
->swap_dyn_out (hash_table
->dynobj
, &dyn
, newcontents
+ s
->size
);
3046 s
->contents
= newcontents
;
3051 /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true,
3052 otherwise just check whether one already exists. Returns -1 on error,
3053 1 if a DT_NEEDED tag already exists, and 0 on success. */
3056 elf_add_dt_needed_tag (bfd
*abfd
,
3057 struct bfd_link_info
*info
,
3061 struct elf_link_hash_table
*hash_table
;
3062 bfd_size_type strindex
;
3064 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
3067 hash_table
= elf_hash_table (info
);
3068 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, soname
, FALSE
);
3069 if (strindex
== (bfd_size_type
) -1)
3072 if (_bfd_elf_strtab_refcount (hash_table
->dynstr
, strindex
) != 1)
3075 const struct elf_backend_data
*bed
;
3078 bed
= get_elf_backend_data (hash_table
->dynobj
);
3079 sdyn
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3081 for (extdyn
= sdyn
->contents
;
3082 extdyn
< sdyn
->contents
+ sdyn
->size
;
3083 extdyn
+= bed
->s
->sizeof_dyn
)
3085 Elf_Internal_Dyn dyn
;
3087 bed
->s
->swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3088 if (dyn
.d_tag
== DT_NEEDED
3089 && dyn
.d_un
.d_val
== strindex
)
3091 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3099 if (!_bfd_elf_link_create_dynamic_sections (hash_table
->dynobj
, info
))
3102 if (!_bfd_elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
3106 /* We were just checking for existence of the tag. */
3107 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3113 on_needed_list (const char *soname
, struct bfd_link_needed_list
*needed
)
3115 for (; needed
!= NULL
; needed
= needed
->next
)
3116 if (strcmp (soname
, needed
->name
) == 0)
3122 /* Sort symbol by value, section, and size. */
3124 elf_sort_symbol (const void *arg1
, const void *arg2
)
3126 const struct elf_link_hash_entry
*h1
;
3127 const struct elf_link_hash_entry
*h2
;
3128 bfd_signed_vma vdiff
;
3130 h1
= *(const struct elf_link_hash_entry
**) arg1
;
3131 h2
= *(const struct elf_link_hash_entry
**) arg2
;
3132 vdiff
= h1
->root
.u
.def
.value
- h2
->root
.u
.def
.value
;
3134 return vdiff
> 0 ? 1 : -1;
3137 long sdiff
= h1
->root
.u
.def
.section
->id
- h2
->root
.u
.def
.section
->id
;
3139 return sdiff
> 0 ? 1 : -1;
3141 vdiff
= h1
->size
- h2
->size
;
3142 return vdiff
== 0 ? 0 : vdiff
> 0 ? 1 : -1;
3145 /* This function is used to adjust offsets into .dynstr for
3146 dynamic symbols. This is called via elf_link_hash_traverse. */
3149 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
3151 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3153 if (h
->dynindx
!= -1)
3154 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3158 /* Assign string offsets in .dynstr, update all structures referencing
3162 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
3164 struct elf_link_hash_table
*hash_table
= elf_hash_table (info
);
3165 struct elf_link_local_dynamic_entry
*entry
;
3166 struct elf_strtab_hash
*dynstr
= hash_table
->dynstr
;
3167 bfd
*dynobj
= hash_table
->dynobj
;
3170 const struct elf_backend_data
*bed
;
3173 _bfd_elf_strtab_finalize (dynstr
);
3174 size
= _bfd_elf_strtab_size (dynstr
);
3176 bed
= get_elf_backend_data (dynobj
);
3177 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3178 BFD_ASSERT (sdyn
!= NULL
);
3180 /* Update all .dynamic entries referencing .dynstr strings. */
3181 for (extdyn
= sdyn
->contents
;
3182 extdyn
< sdyn
->contents
+ sdyn
->size
;
3183 extdyn
+= bed
->s
->sizeof_dyn
)
3185 Elf_Internal_Dyn dyn
;
3187 bed
->s
->swap_dyn_in (dynobj
, extdyn
, &dyn
);
3191 dyn
.d_un
.d_val
= size
;
3201 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3206 bed
->s
->swap_dyn_out (dynobj
, &dyn
, extdyn
);
3209 /* Now update local dynamic symbols. */
3210 for (entry
= hash_table
->dynlocal
; entry
; entry
= entry
->next
)
3211 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3212 entry
->isym
.st_name
);
3214 /* And the rest of dynamic symbols. */
3215 elf_link_hash_traverse (hash_table
, elf_adjust_dynstr_offsets
, dynstr
);
3217 /* Adjust version definitions. */
3218 if (elf_tdata (output_bfd
)->cverdefs
)
3223 Elf_Internal_Verdef def
;
3224 Elf_Internal_Verdaux defaux
;
3226 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
3230 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3232 p
+= sizeof (Elf_External_Verdef
);
3233 if (def
.vd_aux
!= sizeof (Elf_External_Verdef
))
3235 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3237 _bfd_elf_swap_verdaux_in (output_bfd
,
3238 (Elf_External_Verdaux
*) p
, &defaux
);
3239 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3241 _bfd_elf_swap_verdaux_out (output_bfd
,
3242 &defaux
, (Elf_External_Verdaux
*) p
);
3243 p
+= sizeof (Elf_External_Verdaux
);
3246 while (def
.vd_next
);
3249 /* Adjust version references. */
3250 if (elf_tdata (output_bfd
)->verref
)
3255 Elf_Internal_Verneed need
;
3256 Elf_Internal_Vernaux needaux
;
3258 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
3262 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3264 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3265 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3266 (Elf_External_Verneed
*) p
);
3267 p
+= sizeof (Elf_External_Verneed
);
3268 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3270 _bfd_elf_swap_vernaux_in (output_bfd
,
3271 (Elf_External_Vernaux
*) p
, &needaux
);
3272 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3274 _bfd_elf_swap_vernaux_out (output_bfd
,
3276 (Elf_External_Vernaux
*) p
);
3277 p
+= sizeof (Elf_External_Vernaux
);
3280 while (need
.vn_next
);
3286 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3287 The default is to only match when the INPUT and OUTPUT are exactly
3291 _bfd_elf_default_relocs_compatible (const bfd_target
*input
,
3292 const bfd_target
*output
)
3294 return input
== output
;
3297 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3298 This version is used when different targets for the same architecture
3299 are virtually identical. */
3302 _bfd_elf_relocs_compatible (const bfd_target
*input
,
3303 const bfd_target
*output
)
3305 const struct elf_backend_data
*obed
, *ibed
;
3307 if (input
== output
)
3310 ibed
= xvec_get_elf_backend_data (input
);
3311 obed
= xvec_get_elf_backend_data (output
);
3313 if (ibed
->arch
!= obed
->arch
)
3316 /* If both backends are using this function, deem them compatible. */
3317 return ibed
->relocs_compatible
== obed
->relocs_compatible
;
3320 /* Make a special call to the linker "notice" function to tell it that
3321 we are about to handle an as-needed lib, or have finished
3322 processing the lib. */
3325 _bfd_elf_notice_as_needed (bfd
*ibfd
,
3326 struct bfd_link_info
*info
,
3327 enum notice_asneeded_action act
)
3329 return (*info
->callbacks
->notice
) (info
, NULL
, ibfd
, NULL
, act
, 0, NULL
);
3332 /* Add symbols from an ELF object file to the linker hash table. */
3335 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3337 Elf_Internal_Ehdr
*ehdr
;
3338 Elf_Internal_Shdr
*hdr
;
3339 bfd_size_type symcount
;
3340 bfd_size_type extsymcount
;
3341 bfd_size_type extsymoff
;
3342 struct elf_link_hash_entry
**sym_hash
;
3343 bfd_boolean dynamic
;
3344 Elf_External_Versym
*extversym
= NULL
;
3345 Elf_External_Versym
*ever
;
3346 struct elf_link_hash_entry
*weaks
;
3347 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
3348 bfd_size_type nondeflt_vers_cnt
= 0;
3349 Elf_Internal_Sym
*isymbuf
= NULL
;
3350 Elf_Internal_Sym
*isym
;
3351 Elf_Internal_Sym
*isymend
;
3352 const struct elf_backend_data
*bed
;
3353 bfd_boolean add_needed
;
3354 struct elf_link_hash_table
*htab
;
3356 void *alloc_mark
= NULL
;
3357 struct bfd_hash_entry
**old_table
= NULL
;
3358 unsigned int old_size
= 0;
3359 unsigned int old_count
= 0;
3360 void *old_tab
= NULL
;
3362 struct bfd_link_hash_entry
*old_undefs
= NULL
;
3363 struct bfd_link_hash_entry
*old_undefs_tail
= NULL
;
3364 long old_dynsymcount
= 0;
3365 bfd_size_type old_dynstr_size
= 0;
3369 htab
= elf_hash_table (info
);
3370 bed
= get_elf_backend_data (abfd
);
3372 if ((abfd
->flags
& DYNAMIC
) == 0)
3378 /* You can't use -r against a dynamic object. Also, there's no
3379 hope of using a dynamic object which does not exactly match
3380 the format of the output file. */
3381 if (info
->relocatable
3382 || !is_elf_hash_table (htab
)
3383 || info
->output_bfd
->xvec
!= abfd
->xvec
)
3385 if (info
->relocatable
)
3386 bfd_set_error (bfd_error_invalid_operation
);
3388 bfd_set_error (bfd_error_wrong_format
);
3393 ehdr
= elf_elfheader (abfd
);
3394 if (info
->warn_alternate_em
3395 && bed
->elf_machine_code
!= ehdr
->e_machine
3396 && ((bed
->elf_machine_alt1
!= 0
3397 && ehdr
->e_machine
== bed
->elf_machine_alt1
)
3398 || (bed
->elf_machine_alt2
!= 0
3399 && ehdr
->e_machine
== bed
->elf_machine_alt2
)))
3400 info
->callbacks
->einfo
3401 (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"),
3402 ehdr
->e_machine
, abfd
, bed
->elf_machine_code
);
3404 /* As a GNU extension, any input sections which are named
3405 .gnu.warning.SYMBOL are treated as warning symbols for the given
3406 symbol. This differs from .gnu.warning sections, which generate
3407 warnings when they are included in an output file. */
3408 /* PR 12761: Also generate this warning when building shared libraries. */
3409 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3413 name
= bfd_get_section_name (abfd
, s
);
3414 if (CONST_STRNEQ (name
, ".gnu.warning."))
3419 name
+= sizeof ".gnu.warning." - 1;
3421 /* If this is a shared object, then look up the symbol
3422 in the hash table. If it is there, and it is already
3423 been defined, then we will not be using the entry
3424 from this shared object, so we don't need to warn.
3425 FIXME: If we see the definition in a regular object
3426 later on, we will warn, but we shouldn't. The only
3427 fix is to keep track of what warnings we are supposed
3428 to emit, and then handle them all at the end of the
3432 struct elf_link_hash_entry
*h
;
3434 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
3436 /* FIXME: What about bfd_link_hash_common? */
3438 && (h
->root
.type
== bfd_link_hash_defined
3439 || h
->root
.type
== bfd_link_hash_defweak
))
3444 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
3448 if (! bfd_get_section_contents (abfd
, s
, msg
, 0, sz
))
3453 if (! (_bfd_generic_link_add_one_symbol
3454 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
3455 FALSE
, bed
->collect
, NULL
)))
3458 if (!info
->relocatable
&& info
->executable
)
3460 /* Clobber the section size so that the warning does
3461 not get copied into the output file. */
3464 /* Also set SEC_EXCLUDE, so that symbols defined in
3465 the warning section don't get copied to the output. */
3466 s
->flags
|= SEC_EXCLUDE
;
3474 /* If we are creating a shared library, create all the dynamic
3475 sections immediately. We need to attach them to something,
3476 so we attach them to this BFD, provided it is the right
3477 format. FIXME: If there are no input BFD's of the same
3478 format as the output, we can't make a shared library. */
3480 && is_elf_hash_table (htab
)
3481 && info
->output_bfd
->xvec
== abfd
->xvec
3482 && !htab
->dynamic_sections_created
)
3484 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
3488 else if (!is_elf_hash_table (htab
))
3492 const char *soname
= NULL
;
3494 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
3497 /* ld --just-symbols and dynamic objects don't mix very well.
3498 ld shouldn't allow it. */
3499 if ((s
= abfd
->sections
) != NULL
3500 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3503 /* If this dynamic lib was specified on the command line with
3504 --as-needed in effect, then we don't want to add a DT_NEEDED
3505 tag unless the lib is actually used. Similary for libs brought
3506 in by another lib's DT_NEEDED. When --no-add-needed is used
3507 on a dynamic lib, we don't want to add a DT_NEEDED entry for
3508 any dynamic library in DT_NEEDED tags in the dynamic lib at
3510 add_needed
= (elf_dyn_lib_class (abfd
)
3511 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
3512 | DYN_NO_NEEDED
)) == 0;
3514 s
= bfd_get_section_by_name (abfd
, ".dynamic");
3519 unsigned int elfsec
;
3520 unsigned long shlink
;
3522 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
3529 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
3530 if (elfsec
== SHN_BAD
)
3531 goto error_free_dyn
;
3532 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
3534 for (extdyn
= dynbuf
;
3535 extdyn
< dynbuf
+ s
->size
;
3536 extdyn
+= bed
->s
->sizeof_dyn
)
3538 Elf_Internal_Dyn dyn
;
3540 bed
->s
->swap_dyn_in (abfd
, extdyn
, &dyn
);
3541 if (dyn
.d_tag
== DT_SONAME
)
3543 unsigned int tagv
= dyn
.d_un
.d_val
;
3544 soname
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3546 goto error_free_dyn
;
3548 if (dyn
.d_tag
== DT_NEEDED
)
3550 struct bfd_link_needed_list
*n
, **pn
;
3552 unsigned int tagv
= dyn
.d_un
.d_val
;
3554 amt
= sizeof (struct bfd_link_needed_list
);
3555 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3556 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3557 if (n
== NULL
|| fnm
== NULL
)
3558 goto error_free_dyn
;
3559 amt
= strlen (fnm
) + 1;
3560 anm
= (char *) bfd_alloc (abfd
, amt
);
3562 goto error_free_dyn
;
3563 memcpy (anm
, fnm
, amt
);
3567 for (pn
= &htab
->needed
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3571 if (dyn
.d_tag
== DT_RUNPATH
)
3573 struct bfd_link_needed_list
*n
, **pn
;
3575 unsigned int tagv
= dyn
.d_un
.d_val
;
3577 amt
= sizeof (struct bfd_link_needed_list
);
3578 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3579 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3580 if (n
== NULL
|| fnm
== NULL
)
3581 goto error_free_dyn
;
3582 amt
= strlen (fnm
) + 1;
3583 anm
= (char *) bfd_alloc (abfd
, amt
);
3585 goto error_free_dyn
;
3586 memcpy (anm
, fnm
, amt
);
3590 for (pn
= & runpath
;
3596 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
3597 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
3599 struct bfd_link_needed_list
*n
, **pn
;
3601 unsigned int tagv
= dyn
.d_un
.d_val
;
3603 amt
= sizeof (struct bfd_link_needed_list
);
3604 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3605 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3606 if (n
== NULL
|| fnm
== NULL
)
3607 goto error_free_dyn
;
3608 amt
= strlen (fnm
) + 1;
3609 anm
= (char *) bfd_alloc (abfd
, amt
);
3611 goto error_free_dyn
;
3612 memcpy (anm
, fnm
, amt
);
3622 if (dyn
.d_tag
== DT_AUDIT
)
3624 unsigned int tagv
= dyn
.d_un
.d_val
;
3625 audit
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3632 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
3633 frees all more recently bfd_alloc'd blocks as well. */
3639 struct bfd_link_needed_list
**pn
;
3640 for (pn
= &htab
->runpath
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3645 /* We do not want to include any of the sections in a dynamic
3646 object in the output file. We hack by simply clobbering the
3647 list of sections in the BFD. This could be handled more
3648 cleanly by, say, a new section flag; the existing
3649 SEC_NEVER_LOAD flag is not the one we want, because that one
3650 still implies that the section takes up space in the output
3652 bfd_section_list_clear (abfd
);
3654 /* Find the name to use in a DT_NEEDED entry that refers to this
3655 object. If the object has a DT_SONAME entry, we use it.
3656 Otherwise, if the generic linker stuck something in
3657 elf_dt_name, we use that. Otherwise, we just use the file
3659 if (soname
== NULL
|| *soname
== '\0')
3661 soname
= elf_dt_name (abfd
);
3662 if (soname
== NULL
|| *soname
== '\0')
3663 soname
= bfd_get_filename (abfd
);
3666 /* Save the SONAME because sometimes the linker emulation code
3667 will need to know it. */
3668 elf_dt_name (abfd
) = soname
;
3670 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
3674 /* If we have already included this dynamic object in the
3675 link, just ignore it. There is no reason to include a
3676 particular dynamic object more than once. */
3680 /* Save the DT_AUDIT entry for the linker emulation code. */
3681 elf_dt_audit (abfd
) = audit
;
3684 /* If this is a dynamic object, we always link against the .dynsym
3685 symbol table, not the .symtab symbol table. The dynamic linker
3686 will only see the .dynsym symbol table, so there is no reason to
3687 look at .symtab for a dynamic object. */
3689 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
3690 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3692 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3694 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
3696 /* The sh_info field of the symtab header tells us where the
3697 external symbols start. We don't care about the local symbols at
3699 if (elf_bad_symtab (abfd
))
3701 extsymcount
= symcount
;
3706 extsymcount
= symcount
- hdr
->sh_info
;
3707 extsymoff
= hdr
->sh_info
;
3710 sym_hash
= elf_sym_hashes (abfd
);
3711 if (extsymcount
!= 0)
3713 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3715 if (isymbuf
== NULL
)
3718 if (sym_hash
== NULL
)
3720 /* We store a pointer to the hash table entry for each
3722 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
3723 sym_hash
= (struct elf_link_hash_entry
**) bfd_zalloc (abfd
, amt
);
3724 if (sym_hash
== NULL
)
3725 goto error_free_sym
;
3726 elf_sym_hashes (abfd
) = sym_hash
;
3732 /* Read in any version definitions. */
3733 if (!_bfd_elf_slurp_version_tables (abfd
,
3734 info
->default_imported_symver
))
3735 goto error_free_sym
;
3737 /* Read in the symbol versions, but don't bother to convert them
3738 to internal format. */
3739 if (elf_dynversym (abfd
) != 0)
3741 Elf_Internal_Shdr
*versymhdr
;
3743 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
3744 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
3745 if (extversym
== NULL
)
3746 goto error_free_sym
;
3747 amt
= versymhdr
->sh_size
;
3748 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
3749 || bfd_bread (extversym
, amt
, abfd
) != amt
)
3750 goto error_free_vers
;
3754 /* If we are loading an as-needed shared lib, save the symbol table
3755 state before we start adding symbols. If the lib turns out
3756 to be unneeded, restore the state. */
3757 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
3762 for (entsize
= 0, i
= 0; i
< htab
->root
.table
.size
; i
++)
3764 struct bfd_hash_entry
*p
;
3765 struct elf_link_hash_entry
*h
;
3767 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3769 h
= (struct elf_link_hash_entry
*) p
;
3770 entsize
+= htab
->root
.table
.entsize
;
3771 if (h
->root
.type
== bfd_link_hash_warning
)
3772 entsize
+= htab
->root
.table
.entsize
;
3776 tabsize
= htab
->root
.table
.size
* sizeof (struct bfd_hash_entry
*);
3777 old_tab
= bfd_malloc (tabsize
+ entsize
);
3778 if (old_tab
== NULL
)
3779 goto error_free_vers
;
3781 /* Remember the current objalloc pointer, so that all mem for
3782 symbols added can later be reclaimed. */
3783 alloc_mark
= bfd_hash_allocate (&htab
->root
.table
, 1);
3784 if (alloc_mark
== NULL
)
3785 goto error_free_vers
;
3787 /* Make a special call to the linker "notice" function to
3788 tell it that we are about to handle an as-needed lib. */
3789 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_as_needed
))
3790 goto error_free_vers
;
3792 /* Clone the symbol table. Remember some pointers into the
3793 symbol table, and dynamic symbol count. */
3794 old_ent
= (char *) old_tab
+ tabsize
;
3795 memcpy (old_tab
, htab
->root
.table
.table
, tabsize
);
3796 old_undefs
= htab
->root
.undefs
;
3797 old_undefs_tail
= htab
->root
.undefs_tail
;
3798 old_table
= htab
->root
.table
.table
;
3799 old_size
= htab
->root
.table
.size
;
3800 old_count
= htab
->root
.table
.count
;
3801 old_dynsymcount
= htab
->dynsymcount
;
3802 old_dynstr_size
= _bfd_elf_strtab_size (htab
->dynstr
);
3804 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
3806 struct bfd_hash_entry
*p
;
3807 struct elf_link_hash_entry
*h
;
3809 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3811 memcpy (old_ent
, p
, htab
->root
.table
.entsize
);
3812 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3813 h
= (struct elf_link_hash_entry
*) p
;
3814 if (h
->root
.type
== bfd_link_hash_warning
)
3816 memcpy (old_ent
, h
->root
.u
.i
.link
, htab
->root
.table
.entsize
);
3817 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3824 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
3825 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
3827 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
3831 asection
*sec
, *new_sec
;
3834 struct elf_link_hash_entry
*h
;
3835 struct elf_link_hash_entry
*hi
;
3836 bfd_boolean definition
;
3837 bfd_boolean size_change_ok
;
3838 bfd_boolean type_change_ok
;
3839 bfd_boolean new_weakdef
;
3840 bfd_boolean new_weak
;
3841 bfd_boolean old_weak
;
3842 bfd_boolean override
;
3844 unsigned int old_alignment
;
3849 flags
= BSF_NO_FLAGS
;
3851 value
= isym
->st_value
;
3852 common
= bed
->common_definition (isym
);
3854 bind
= ELF_ST_BIND (isym
->st_info
);
3858 /* This should be impossible, since ELF requires that all
3859 global symbols follow all local symbols, and that sh_info
3860 point to the first global symbol. Unfortunately, Irix 5
3865 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
3873 case STB_GNU_UNIQUE
:
3874 flags
= BSF_GNU_UNIQUE
;
3878 /* Leave it up to the processor backend. */
3882 if (isym
->st_shndx
== SHN_UNDEF
)
3883 sec
= bfd_und_section_ptr
;
3884 else if (isym
->st_shndx
== SHN_ABS
)
3885 sec
= bfd_abs_section_ptr
;
3886 else if (isym
->st_shndx
== SHN_COMMON
)
3888 sec
= bfd_com_section_ptr
;
3889 /* What ELF calls the size we call the value. What ELF
3890 calls the value we call the alignment. */
3891 value
= isym
->st_size
;
3895 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3897 sec
= bfd_abs_section_ptr
;
3898 else if (discarded_section (sec
))
3900 /* Symbols from discarded section are undefined. We keep
3902 sec
= bfd_und_section_ptr
;
3903 isym
->st_shndx
= SHN_UNDEF
;
3905 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
3909 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3912 goto error_free_vers
;
3914 if (isym
->st_shndx
== SHN_COMMON
3915 && (abfd
->flags
& BFD_PLUGIN
) != 0)
3917 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
3921 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
3923 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
3925 goto error_free_vers
;
3929 else if (isym
->st_shndx
== SHN_COMMON
3930 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
3931 && !info
->relocatable
)
3933 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
3937 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
3938 | SEC_LINKER_CREATED
);
3939 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
3941 goto error_free_vers
;
3945 else if (bed
->elf_add_symbol_hook
)
3947 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
3949 goto error_free_vers
;
3951 /* The hook function sets the name to NULL if this symbol
3952 should be skipped for some reason. */
3957 /* Sanity check that all possibilities were handled. */
3960 bfd_set_error (bfd_error_bad_value
);
3961 goto error_free_vers
;
3964 /* Silently discard TLS symbols from --just-syms. There's
3965 no way to combine a static TLS block with a new TLS block
3966 for this executable. */
3967 if (ELF_ST_TYPE (isym
->st_info
) == STT_TLS
3968 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3971 if (bfd_is_und_section (sec
)
3972 || bfd_is_com_section (sec
))
3977 size_change_ok
= FALSE
;
3978 type_change_ok
= bed
->type_change_ok
;
3984 if (is_elf_hash_table (htab
))
3986 Elf_Internal_Versym iver
;
3987 unsigned int vernum
= 0;
3992 if (info
->default_imported_symver
)
3993 /* Use the default symbol version created earlier. */
3994 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
3999 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
4001 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
4003 /* If this is a hidden symbol, or if it is not version
4004 1, we append the version name to the symbol name.
4005 However, we do not modify a non-hidden absolute symbol
4006 if it is not a function, because it might be the version
4007 symbol itself. FIXME: What if it isn't? */
4008 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
4010 && (!bfd_is_abs_section (sec
)
4011 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4014 size_t namelen
, verlen
, newlen
;
4017 if (isym
->st_shndx
!= SHN_UNDEF
)
4019 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4021 else if (vernum
> 1)
4023 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4029 (*_bfd_error_handler
)
4030 (_("%B: %s: invalid version %u (max %d)"),
4032 elf_tdata (abfd
)->cverdefs
);
4033 bfd_set_error (bfd_error_bad_value
);
4034 goto error_free_vers
;
4039 /* We cannot simply test for the number of
4040 entries in the VERNEED section since the
4041 numbers for the needed versions do not start
4043 Elf_Internal_Verneed
*t
;
4046 for (t
= elf_tdata (abfd
)->verref
;
4050 Elf_Internal_Vernaux
*a
;
4052 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4054 if (a
->vna_other
== vernum
)
4056 verstr
= a
->vna_nodename
;
4065 (*_bfd_error_handler
)
4066 (_("%B: %s: invalid needed version %d"),
4067 abfd
, name
, vernum
);
4068 bfd_set_error (bfd_error_bad_value
);
4069 goto error_free_vers
;
4073 namelen
= strlen (name
);
4074 verlen
= strlen (verstr
);
4075 newlen
= namelen
+ verlen
+ 2;
4076 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4077 && isym
->st_shndx
!= SHN_UNDEF
)
4080 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4081 if (newname
== NULL
)
4082 goto error_free_vers
;
4083 memcpy (newname
, name
, namelen
);
4084 p
= newname
+ namelen
;
4086 /* If this is a defined non-hidden version symbol,
4087 we add another @ to the name. This indicates the
4088 default version of the symbol. */
4089 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4090 && isym
->st_shndx
!= SHN_UNDEF
)
4092 memcpy (p
, verstr
, verlen
+ 1);
4097 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
4098 sym_hash
, &old_bfd
, &old_weak
,
4099 &old_alignment
, &skip
, &override
,
4100 &type_change_ok
, &size_change_ok
))
4101 goto error_free_vers
;
4110 while (h
->root
.type
== bfd_link_hash_indirect
4111 || h
->root
.type
== bfd_link_hash_warning
)
4112 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4114 if (elf_tdata (abfd
)->verdef
!= NULL
4117 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4120 if (! (_bfd_generic_link_add_one_symbol
4121 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, bed
->collect
,
4122 (struct bfd_link_hash_entry
**) sym_hash
)))
4123 goto error_free_vers
;
4126 /* We need to make sure that indirect symbol dynamic flags are
4129 while (h
->root
.type
== bfd_link_hash_indirect
4130 || h
->root
.type
== bfd_link_hash_warning
)
4131 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4135 new_weak
= (flags
& BSF_WEAK
) != 0;
4136 new_weakdef
= FALSE
;
4140 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4141 && is_elf_hash_table (htab
)
4142 && h
->u
.weakdef
== NULL
)
4144 /* Keep a list of all weak defined non function symbols from
4145 a dynamic object, using the weakdef field. Later in this
4146 function we will set the weakdef field to the correct
4147 value. We only put non-function symbols from dynamic
4148 objects on this list, because that happens to be the only
4149 time we need to know the normal symbol corresponding to a
4150 weak symbol, and the information is time consuming to
4151 figure out. If the weakdef field is not already NULL,
4152 then this symbol was already defined by some previous
4153 dynamic object, and we will be using that previous
4154 definition anyhow. */
4156 h
->u
.weakdef
= weaks
;
4161 /* Set the alignment of a common symbol. */
4162 if ((common
|| bfd_is_com_section (sec
))
4163 && h
->root
.type
== bfd_link_hash_common
)
4168 align
= bfd_log2 (isym
->st_value
);
4171 /* The new symbol is a common symbol in a shared object.
4172 We need to get the alignment from the section. */
4173 align
= new_sec
->alignment_power
;
4175 if (align
> old_alignment
)
4176 h
->root
.u
.c
.p
->alignment_power
= align
;
4178 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
4181 if (is_elf_hash_table (htab
))
4183 /* Set a flag in the hash table entry indicating the type of
4184 reference or definition we just found. A dynamic symbol
4185 is one which is referenced or defined by both a regular
4186 object and a shared object. */
4187 bfd_boolean dynsym
= FALSE
;
4189 /* Plugin symbols aren't normal. Don't set def_regular or
4190 ref_regular for them, or make them dynamic. */
4191 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4198 if (bind
!= STB_WEAK
)
4199 h
->ref_regular_nonweak
= 1;
4211 /* If the indirect symbol has been forced local, don't
4212 make the real symbol dynamic. */
4213 if ((h
== hi
|| !hi
->forced_local
)
4214 && (! info
->executable
4224 hi
->ref_dynamic
= 1;
4229 hi
->def_dynamic
= 1;
4232 /* If the indirect symbol has been forced local, don't
4233 make the real symbol dynamic. */
4234 if ((h
== hi
|| !hi
->forced_local
)
4237 || (h
->u
.weakdef
!= NULL
4239 && h
->u
.weakdef
->dynindx
!= -1)))
4243 /* Check to see if we need to add an indirect symbol for
4244 the default name. */
4246 || (!override
&& h
->root
.type
== bfd_link_hash_common
))
4247 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
4248 sec
, value
, &old_bfd
, &dynsym
))
4249 goto error_free_vers
;
4251 /* Check the alignment when a common symbol is involved. This
4252 can change when a common symbol is overridden by a normal
4253 definition or a common symbol is ignored due to the old
4254 normal definition. We need to make sure the maximum
4255 alignment is maintained. */
4256 if ((old_alignment
|| common
)
4257 && h
->root
.type
!= bfd_link_hash_common
)
4259 unsigned int common_align
;
4260 unsigned int normal_align
;
4261 unsigned int symbol_align
;
4265 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
4266 || h
->root
.type
== bfd_link_hash_defweak
);
4268 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
4269 if (h
->root
.u
.def
.section
->owner
!= NULL
4270 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
4272 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
4273 if (normal_align
> symbol_align
)
4274 normal_align
= symbol_align
;
4277 normal_align
= symbol_align
;
4281 common_align
= old_alignment
;
4282 common_bfd
= old_bfd
;
4287 common_align
= bfd_log2 (isym
->st_value
);
4289 normal_bfd
= old_bfd
;
4292 if (normal_align
< common_align
)
4294 /* PR binutils/2735 */
4295 if (normal_bfd
== NULL
)
4296 (*_bfd_error_handler
)
4297 (_("Warning: alignment %u of common symbol `%s' in %B is"
4298 " greater than the alignment (%u) of its section %A"),
4299 common_bfd
, h
->root
.u
.def
.section
,
4300 1 << common_align
, name
, 1 << normal_align
);
4302 (*_bfd_error_handler
)
4303 (_("Warning: alignment %u of symbol `%s' in %B"
4304 " is smaller than %u in %B"),
4305 normal_bfd
, common_bfd
,
4306 1 << normal_align
, name
, 1 << common_align
);
4310 /* Remember the symbol size if it isn't undefined. */
4311 if (isym
->st_size
!= 0
4312 && isym
->st_shndx
!= SHN_UNDEF
4313 && (definition
|| h
->size
== 0))
4316 && h
->size
!= isym
->st_size
4317 && ! size_change_ok
)
4318 (*_bfd_error_handler
)
4319 (_("Warning: size of symbol `%s' changed"
4320 " from %lu in %B to %lu in %B"),
4322 name
, (unsigned long) h
->size
,
4323 (unsigned long) isym
->st_size
);
4325 h
->size
= isym
->st_size
;
4328 /* If this is a common symbol, then we always want H->SIZE
4329 to be the size of the common symbol. The code just above
4330 won't fix the size if a common symbol becomes larger. We
4331 don't warn about a size change here, because that is
4332 covered by --warn-common. Allow changes between different
4334 if (h
->root
.type
== bfd_link_hash_common
)
4335 h
->size
= h
->root
.u
.c
.size
;
4337 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
4338 && ((definition
&& !new_weak
)
4339 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
4340 || h
->type
== STT_NOTYPE
))
4342 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
4344 /* Turn an IFUNC symbol from a DSO into a normal FUNC
4346 if (type
== STT_GNU_IFUNC
4347 && (abfd
->flags
& DYNAMIC
) != 0)
4350 if (h
->type
!= type
)
4352 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
4353 (*_bfd_error_handler
)
4354 (_("Warning: type of symbol `%s' changed"
4355 " from %d to %d in %B"),
4356 abfd
, name
, h
->type
, type
);
4362 /* Merge st_other field. */
4363 elf_merge_st_other (abfd
, h
, isym
, definition
, dynamic
);
4365 /* We don't want to make debug symbol dynamic. */
4366 if (definition
&& (sec
->flags
& SEC_DEBUGGING
) && !info
->relocatable
)
4369 /* Nor should we make plugin symbols dynamic. */
4370 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4375 h
->target_internal
= isym
->st_target_internal
;
4376 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
4379 if (definition
&& !dynamic
)
4381 char *p
= strchr (name
, ELF_VER_CHR
);
4382 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
4384 /* Queue non-default versions so that .symver x, x@FOO
4385 aliases can be checked. */
4388 amt
= ((isymend
- isym
+ 1)
4389 * sizeof (struct elf_link_hash_entry
*));
4391 (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4393 goto error_free_vers
;
4395 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
4399 if (dynsym
&& h
->dynindx
== -1)
4401 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4402 goto error_free_vers
;
4403 if (h
->u
.weakdef
!= NULL
4405 && h
->u
.weakdef
->dynindx
== -1)
4407 if (!bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
4408 goto error_free_vers
;
4411 else if (dynsym
&& h
->dynindx
!= -1)
4412 /* If the symbol already has a dynamic index, but
4413 visibility says it should not be visible, turn it into
4415 switch (ELF_ST_VISIBILITY (h
->other
))
4419 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4424 /* Don't add DT_NEEDED for references from the dummy bfd. */
4428 && h
->ref_regular_nonweak
4430 || (old_bfd
->flags
& BFD_PLUGIN
) == 0))
4431 || (h
->ref_dynamic_nonweak
4432 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
4433 && !on_needed_list (elf_dt_name (abfd
), htab
->needed
))))
4436 const char *soname
= elf_dt_name (abfd
);
4438 /* A symbol from a library loaded via DT_NEEDED of some
4439 other library is referenced by a regular object.
4440 Add a DT_NEEDED entry for it. Issue an error if
4441 --no-add-needed is used and the reference was not
4444 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
4446 (*_bfd_error_handler
)
4447 (_("%B: undefined reference to symbol '%s'"),
4449 bfd_set_error (bfd_error_missing_dso
);
4450 goto error_free_vers
;
4453 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
4454 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
4457 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
4459 goto error_free_vers
;
4461 BFD_ASSERT (ret
== 0);
4466 if (extversym
!= NULL
)
4472 if (isymbuf
!= NULL
)
4478 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4482 /* Restore the symbol table. */
4483 old_ent
= (char *) old_tab
+ tabsize
;
4484 memset (elf_sym_hashes (abfd
), 0,
4485 extsymcount
* sizeof (struct elf_link_hash_entry
*));
4486 htab
->root
.table
.table
= old_table
;
4487 htab
->root
.table
.size
= old_size
;
4488 htab
->root
.table
.count
= old_count
;
4489 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
4490 htab
->root
.undefs
= old_undefs
;
4491 htab
->root
.undefs_tail
= old_undefs_tail
;
4492 _bfd_elf_strtab_restore_size (htab
->dynstr
, old_dynstr_size
);
4493 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4495 struct bfd_hash_entry
*p
;
4496 struct elf_link_hash_entry
*h
;
4498 unsigned int alignment_power
;
4500 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4502 h
= (struct elf_link_hash_entry
*) p
;
4503 if (h
->root
.type
== bfd_link_hash_warning
)
4504 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4505 if (h
->dynindx
>= old_dynsymcount
4506 && h
->dynstr_index
< old_dynstr_size
)
4507 _bfd_elf_strtab_delref (htab
->dynstr
, h
->dynstr_index
);
4509 /* Preserve the maximum alignment and size for common
4510 symbols even if this dynamic lib isn't on DT_NEEDED
4511 since it can still be loaded at run time by another
4513 if (h
->root
.type
== bfd_link_hash_common
)
4515 size
= h
->root
.u
.c
.size
;
4516 alignment_power
= h
->root
.u
.c
.p
->alignment_power
;
4521 alignment_power
= 0;
4523 memcpy (p
, old_ent
, htab
->root
.table
.entsize
);
4524 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4525 h
= (struct elf_link_hash_entry
*) p
;
4526 if (h
->root
.type
== bfd_link_hash_warning
)
4528 memcpy (h
->root
.u
.i
.link
, old_ent
, htab
->root
.table
.entsize
);
4529 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4530 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4532 if (h
->root
.type
== bfd_link_hash_common
)
4534 if (size
> h
->root
.u
.c
.size
)
4535 h
->root
.u
.c
.size
= size
;
4536 if (alignment_power
> h
->root
.u
.c
.p
->alignment_power
)
4537 h
->root
.u
.c
.p
->alignment_power
= alignment_power
;
4542 /* Make a special call to the linker "notice" function to
4543 tell it that symbols added for crefs may need to be removed. */
4544 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_not_needed
))
4545 goto error_free_vers
;
4548 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
4550 if (nondeflt_vers
!= NULL
)
4551 free (nondeflt_vers
);
4555 if (old_tab
!= NULL
)
4557 if (!(*bed
->notice_as_needed
) (abfd
, info
, notice_needed
))
4558 goto error_free_vers
;
4563 /* Now that all the symbols from this input file are created, handle
4564 .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */
4565 if (nondeflt_vers
!= NULL
)
4567 bfd_size_type cnt
, symidx
;
4569 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
4571 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
4572 char *shortname
, *p
;
4574 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
4576 || (h
->root
.type
!= bfd_link_hash_defined
4577 && h
->root
.type
!= bfd_link_hash_defweak
))
4580 amt
= p
- h
->root
.root
.string
;
4581 shortname
= (char *) bfd_malloc (amt
+ 1);
4583 goto error_free_vers
;
4584 memcpy (shortname
, h
->root
.root
.string
, amt
);
4585 shortname
[amt
] = '\0';
4587 hi
= (struct elf_link_hash_entry
*)
4588 bfd_link_hash_lookup (&htab
->root
, shortname
,
4589 FALSE
, FALSE
, FALSE
);
4591 && hi
->root
.type
== h
->root
.type
4592 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
4593 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
4595 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
4596 hi
->root
.type
= bfd_link_hash_indirect
;
4597 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
4598 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
4599 sym_hash
= elf_sym_hashes (abfd
);
4601 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
4602 if (sym_hash
[symidx
] == hi
)
4604 sym_hash
[symidx
] = h
;
4610 free (nondeflt_vers
);
4611 nondeflt_vers
= NULL
;
4614 /* Now set the weakdefs field correctly for all the weak defined
4615 symbols we found. The only way to do this is to search all the
4616 symbols. Since we only need the information for non functions in
4617 dynamic objects, that's the only time we actually put anything on
4618 the list WEAKS. We need this information so that if a regular
4619 object refers to a symbol defined weakly in a dynamic object, the
4620 real symbol in the dynamic object is also put in the dynamic
4621 symbols; we also must arrange for both symbols to point to the
4622 same memory location. We could handle the general case of symbol
4623 aliasing, but a general symbol alias can only be generated in
4624 assembler code, handling it correctly would be very time
4625 consuming, and other ELF linkers don't handle general aliasing
4629 struct elf_link_hash_entry
**hpp
;
4630 struct elf_link_hash_entry
**hppend
;
4631 struct elf_link_hash_entry
**sorted_sym_hash
;
4632 struct elf_link_hash_entry
*h
;
4635 /* Since we have to search the whole symbol list for each weak
4636 defined symbol, search time for N weak defined symbols will be
4637 O(N^2). Binary search will cut it down to O(NlogN). */
4638 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
4639 sorted_sym_hash
= (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4640 if (sorted_sym_hash
== NULL
)
4642 sym_hash
= sorted_sym_hash
;
4643 hpp
= elf_sym_hashes (abfd
);
4644 hppend
= hpp
+ extsymcount
;
4646 for (; hpp
< hppend
; hpp
++)
4650 && h
->root
.type
== bfd_link_hash_defined
4651 && !bed
->is_function_type (h
->type
))
4659 qsort (sorted_sym_hash
, sym_count
,
4660 sizeof (struct elf_link_hash_entry
*),
4663 while (weaks
!= NULL
)
4665 struct elf_link_hash_entry
*hlook
;
4668 size_t i
, j
, idx
= 0;
4671 weaks
= hlook
->u
.weakdef
;
4672 hlook
->u
.weakdef
= NULL
;
4674 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
4675 || hlook
->root
.type
== bfd_link_hash_defweak
4676 || hlook
->root
.type
== bfd_link_hash_common
4677 || hlook
->root
.type
== bfd_link_hash_indirect
);
4678 slook
= hlook
->root
.u
.def
.section
;
4679 vlook
= hlook
->root
.u
.def
.value
;
4685 bfd_signed_vma vdiff
;
4687 h
= sorted_sym_hash
[idx
];
4688 vdiff
= vlook
- h
->root
.u
.def
.value
;
4695 long sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
4705 /* We didn't find a value/section match. */
4709 /* With multiple aliases, or when the weak symbol is already
4710 strongly defined, we have multiple matching symbols and
4711 the binary search above may land on any of them. Step
4712 one past the matching symbol(s). */
4715 h
= sorted_sym_hash
[idx
];
4716 if (h
->root
.u
.def
.section
!= slook
4717 || h
->root
.u
.def
.value
!= vlook
)
4721 /* Now look back over the aliases. Since we sorted by size
4722 as well as value and section, we'll choose the one with
4723 the largest size. */
4726 h
= sorted_sym_hash
[idx
];
4728 /* Stop if value or section doesn't match. */
4729 if (h
->root
.u
.def
.section
!= slook
4730 || h
->root
.u
.def
.value
!= vlook
)
4732 else if (h
!= hlook
)
4734 hlook
->u
.weakdef
= h
;
4736 /* If the weak definition is in the list of dynamic
4737 symbols, make sure the real definition is put
4739 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
4741 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4744 free (sorted_sym_hash
);
4749 /* If the real definition is in the list of dynamic
4750 symbols, make sure the weak definition is put
4751 there as well. If we don't do this, then the
4752 dynamic loader might not merge the entries for the
4753 real definition and the weak definition. */
4754 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
4756 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
4757 goto err_free_sym_hash
;
4764 free (sorted_sym_hash
);
4767 if (bed
->check_directives
4768 && !(*bed
->check_directives
) (abfd
, info
))
4771 /* If this object is the same format as the output object, and it is
4772 not a shared library, then let the backend look through the
4775 This is required to build global offset table entries and to
4776 arrange for dynamic relocs. It is not required for the
4777 particular common case of linking non PIC code, even when linking
4778 against shared libraries, but unfortunately there is no way of
4779 knowing whether an object file has been compiled PIC or not.
4780 Looking through the relocs is not particularly time consuming.
4781 The problem is that we must either (1) keep the relocs in memory,
4782 which causes the linker to require additional runtime memory or
4783 (2) read the relocs twice from the input file, which wastes time.
4784 This would be a good case for using mmap.
4786 I have no idea how to handle linking PIC code into a file of a
4787 different format. It probably can't be done. */
4789 && is_elf_hash_table (htab
)
4790 && bed
->check_relocs
!= NULL
4791 && elf_object_id (abfd
) == elf_hash_table_id (htab
)
4792 && (*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
4796 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4798 Elf_Internal_Rela
*internal_relocs
;
4801 if ((o
->flags
& SEC_RELOC
) == 0
4802 || o
->reloc_count
== 0
4803 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
4804 && (o
->flags
& SEC_DEBUGGING
) != 0)
4805 || bfd_is_abs_section (o
->output_section
))
4808 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
4810 if (internal_relocs
== NULL
)
4813 ok
= (*bed
->check_relocs
) (abfd
, info
, o
, internal_relocs
);
4815 if (elf_section_data (o
)->relocs
!= internal_relocs
)
4816 free (internal_relocs
);
4823 /* If this is a non-traditional link, try to optimize the handling
4824 of the .stab/.stabstr sections. */
4826 && ! info
->traditional_format
4827 && is_elf_hash_table (htab
)
4828 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
4832 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
4833 if (stabstr
!= NULL
)
4835 bfd_size_type string_offset
= 0;
4838 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
4839 if (CONST_STRNEQ (stab
->name
, ".stab")
4840 && (!stab
->name
[5] ||
4841 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
4842 && (stab
->flags
& SEC_MERGE
) == 0
4843 && !bfd_is_abs_section (stab
->output_section
))
4845 struct bfd_elf_section_data
*secdata
;
4847 secdata
= elf_section_data (stab
);
4848 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
4849 stabstr
, &secdata
->sec_info
,
4852 if (secdata
->sec_info
)
4853 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
4858 if (is_elf_hash_table (htab
) && add_needed
)
4860 /* Add this bfd to the loaded list. */
4861 struct elf_link_loaded_list
*n
;
4863 n
= (struct elf_link_loaded_list
*)
4864 bfd_alloc (abfd
, sizeof (struct elf_link_loaded_list
));
4868 n
->next
= htab
->loaded
;
4875 if (old_tab
!= NULL
)
4877 if (nondeflt_vers
!= NULL
)
4878 free (nondeflt_vers
);
4879 if (extversym
!= NULL
)
4882 if (isymbuf
!= NULL
)
4888 /* Return the linker hash table entry of a symbol that might be
4889 satisfied by an archive symbol. Return -1 on error. */
4891 struct elf_link_hash_entry
*
4892 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
4893 struct bfd_link_info
*info
,
4896 struct elf_link_hash_entry
*h
;
4900 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
4904 /* If this is a default version (the name contains @@), look up the
4905 symbol again with only one `@' as well as without the version.
4906 The effect is that references to the symbol with and without the
4907 version will be matched by the default symbol in the archive. */
4909 p
= strchr (name
, ELF_VER_CHR
);
4910 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
4913 /* First check with only one `@'. */
4914 len
= strlen (name
);
4915 copy
= (char *) bfd_alloc (abfd
, len
);
4917 return (struct elf_link_hash_entry
*) 0 - 1;
4919 first
= p
- name
+ 1;
4920 memcpy (copy
, name
, first
);
4921 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
4923 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
4926 /* We also need to check references to the symbol without the
4928 copy
[first
- 1] = '\0';
4929 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
4930 FALSE
, FALSE
, TRUE
);
4933 bfd_release (abfd
, copy
);
4937 /* Add symbols from an ELF archive file to the linker hash table. We
4938 don't use _bfd_generic_link_add_archive_symbols because of a
4939 problem which arises on UnixWare. The UnixWare libc.so is an
4940 archive which includes an entry libc.so.1 which defines a bunch of
4941 symbols. The libc.so archive also includes a number of other
4942 object files, which also define symbols, some of which are the same
4943 as those defined in libc.so.1. Correct linking requires that we
4944 consider each object file in turn, and include it if it defines any
4945 symbols we need. _bfd_generic_link_add_archive_symbols does not do
4946 this; it looks through the list of undefined symbols, and includes
4947 any object file which defines them. When this algorithm is used on
4948 UnixWare, it winds up pulling in libc.so.1 early and defining a
4949 bunch of symbols. This means that some of the other objects in the
4950 archive are not included in the link, which is incorrect since they
4951 precede libc.so.1 in the archive.
4953 Fortunately, ELF archive handling is simpler than that done by
4954 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
4955 oddities. In ELF, if we find a symbol in the archive map, and the
4956 symbol is currently undefined, we know that we must pull in that
4959 Unfortunately, we do have to make multiple passes over the symbol
4960 table until nothing further is resolved. */
4963 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
4966 bfd_boolean
*defined
= NULL
;
4967 bfd_boolean
*included
= NULL
;
4971 const struct elf_backend_data
*bed
;
4972 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
4973 (bfd
*, struct bfd_link_info
*, const char *);
4975 if (! bfd_has_map (abfd
))
4977 /* An empty archive is a special case. */
4978 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
4980 bfd_set_error (bfd_error_no_armap
);
4984 /* Keep track of all symbols we know to be already defined, and all
4985 files we know to be already included. This is to speed up the
4986 second and subsequent passes. */
4987 c
= bfd_ardata (abfd
)->symdef_count
;
4991 amt
*= sizeof (bfd_boolean
);
4992 defined
= (bfd_boolean
*) bfd_zmalloc (amt
);
4993 included
= (bfd_boolean
*) bfd_zmalloc (amt
);
4994 if (defined
== NULL
|| included
== NULL
)
4997 symdefs
= bfd_ardata (abfd
)->symdefs
;
4998 bed
= get_elf_backend_data (abfd
);
4999 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5012 symdefend
= symdef
+ c
;
5013 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5015 struct elf_link_hash_entry
*h
;
5017 struct bfd_link_hash_entry
*undefs_tail
;
5020 if (defined
[i
] || included
[i
])
5022 if (symdef
->file_offset
== last
)
5028 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5029 if (h
== (struct elf_link_hash_entry
*) 0 - 1)
5035 if (h
->root
.type
== bfd_link_hash_common
)
5037 /* We currently have a common symbol. The archive map contains
5038 a reference to this symbol, so we may want to include it. We
5039 only want to include it however, if this archive element
5040 contains a definition of the symbol, not just another common
5043 Unfortunately some archivers (including GNU ar) will put
5044 declarations of common symbols into their archive maps, as
5045 well as real definitions, so we cannot just go by the archive
5046 map alone. Instead we must read in the element's symbol
5047 table and check that to see what kind of symbol definition
5049 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5052 else if (h
->root
.type
!= bfd_link_hash_undefined
)
5054 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5059 /* We need to include this archive member. */
5060 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5061 if (element
== NULL
)
5064 if (! bfd_check_format (element
, bfd_object
))
5067 /* Doublecheck that we have not included this object
5068 already--it should be impossible, but there may be
5069 something wrong with the archive. */
5070 if (element
->archive_pass
!= 0)
5072 bfd_set_error (bfd_error_bad_value
);
5075 element
->archive_pass
= 1;
5077 undefs_tail
= info
->hash
->undefs_tail
;
5079 if (!(*info
->callbacks
5080 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5082 if (!bfd_link_add_symbols (element
, info
))
5085 /* If there are any new undefined symbols, we need to make
5086 another pass through the archive in order to see whether
5087 they can be defined. FIXME: This isn't perfect, because
5088 common symbols wind up on undefs_tail and because an
5089 undefined symbol which is defined later on in this pass
5090 does not require another pass. This isn't a bug, but it
5091 does make the code less efficient than it could be. */
5092 if (undefs_tail
!= info
->hash
->undefs_tail
)
5095 /* Look backward to mark all symbols from this object file
5096 which we have already seen in this pass. */
5100 included
[mark
] = TRUE
;
5105 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5107 /* We mark subsequent symbols from this object file as we go
5108 on through the loop. */
5109 last
= symdef
->file_offset
;
5120 if (defined
!= NULL
)
5122 if (included
!= NULL
)
5127 /* Given an ELF BFD, add symbols to the global hash table as
5131 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5133 switch (bfd_get_format (abfd
))
5136 return elf_link_add_object_symbols (abfd
, info
);
5138 return elf_link_add_archive_symbols (abfd
, info
);
5140 bfd_set_error (bfd_error_wrong_format
);
5145 struct hash_codes_info
5147 unsigned long *hashcodes
;
5151 /* This function will be called though elf_link_hash_traverse to store
5152 all hash value of the exported symbols in an array. */
5155 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5157 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5163 /* Ignore indirect symbols. These are added by the versioning code. */
5164 if (h
->dynindx
== -1)
5167 name
= h
->root
.root
.string
;
5168 p
= strchr (name
, ELF_VER_CHR
);
5171 alc
= (char *) bfd_malloc (p
- name
+ 1);
5177 memcpy (alc
, name
, p
- name
);
5178 alc
[p
- name
] = '\0';
5182 /* Compute the hash value. */
5183 ha
= bfd_elf_hash (name
);
5185 /* Store the found hash value in the array given as the argument. */
5186 *(inf
->hashcodes
)++ = ha
;
5188 /* And store it in the struct so that we can put it in the hash table
5190 h
->u
.elf_hash_value
= ha
;
5198 struct collect_gnu_hash_codes
5201 const struct elf_backend_data
*bed
;
5202 unsigned long int nsyms
;
5203 unsigned long int maskbits
;
5204 unsigned long int *hashcodes
;
5205 unsigned long int *hashval
;
5206 unsigned long int *indx
;
5207 unsigned long int *counts
;
5210 long int min_dynindx
;
5211 unsigned long int bucketcount
;
5212 unsigned long int symindx
;
5213 long int local_indx
;
5214 long int shift1
, shift2
;
5215 unsigned long int mask
;
5219 /* This function will be called though elf_link_hash_traverse to store
5220 all hash value of the exported symbols in an array. */
5223 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5225 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5231 /* Ignore indirect symbols. These are added by the versioning code. */
5232 if (h
->dynindx
== -1)
5235 /* Ignore also local symbols and undefined symbols. */
5236 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5239 name
= h
->root
.root
.string
;
5240 p
= strchr (name
, ELF_VER_CHR
);
5243 alc
= (char *) bfd_malloc (p
- name
+ 1);
5249 memcpy (alc
, name
, p
- name
);
5250 alc
[p
- name
] = '\0';
5254 /* Compute the hash value. */
5255 ha
= bfd_elf_gnu_hash (name
);
5257 /* Store the found hash value in the array for compute_bucket_count,
5258 and also for .dynsym reordering purposes. */
5259 s
->hashcodes
[s
->nsyms
] = ha
;
5260 s
->hashval
[h
->dynindx
] = ha
;
5262 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
5263 s
->min_dynindx
= h
->dynindx
;
5271 /* This function will be called though elf_link_hash_traverse to do
5272 final dynaminc symbol renumbering. */
5275 elf_renumber_gnu_hash_syms (struct elf_link_hash_entry
*h
, void *data
)
5277 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5278 unsigned long int bucket
;
5279 unsigned long int val
;
5281 /* Ignore indirect symbols. */
5282 if (h
->dynindx
== -1)
5285 /* Ignore also local symbols and undefined symbols. */
5286 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5288 if (h
->dynindx
>= s
->min_dynindx
)
5289 h
->dynindx
= s
->local_indx
++;
5293 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
5294 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
5295 & ((s
->maskbits
>> s
->shift1
) - 1);
5296 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
5298 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
5299 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
5300 if (s
->counts
[bucket
] == 1)
5301 /* Last element terminates the chain. */
5303 bfd_put_32 (s
->output_bfd
, val
,
5304 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
5305 --s
->counts
[bucket
];
5306 h
->dynindx
= s
->indx
[bucket
]++;
5310 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5313 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
5315 return !(h
->forced_local
5316 || h
->root
.type
== bfd_link_hash_undefined
5317 || h
->root
.type
== bfd_link_hash_undefweak
5318 || ((h
->root
.type
== bfd_link_hash_defined
5319 || h
->root
.type
== bfd_link_hash_defweak
)
5320 && h
->root
.u
.def
.section
->output_section
== NULL
));
5323 /* Array used to determine the number of hash table buckets to use
5324 based on the number of symbols there are. If there are fewer than
5325 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
5326 fewer than 37 we use 17 buckets, and so forth. We never use more
5327 than 32771 buckets. */
5329 static const size_t elf_buckets
[] =
5331 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
5335 /* Compute bucket count for hashing table. We do not use a static set
5336 of possible tables sizes anymore. Instead we determine for all
5337 possible reasonable sizes of the table the outcome (i.e., the
5338 number of collisions etc) and choose the best solution. The
5339 weighting functions are not too simple to allow the table to grow
5340 without bounds. Instead one of the weighting factors is the size.
5341 Therefore the result is always a good payoff between few collisions
5342 (= short chain lengths) and table size. */
5344 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5345 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
5346 unsigned long int nsyms
,
5349 size_t best_size
= 0;
5350 unsigned long int i
;
5352 /* We have a problem here. The following code to optimize the table
5353 size requires an integer type with more the 32 bits. If
5354 BFD_HOST_U_64_BIT is set we know about such a type. */
5355 #ifdef BFD_HOST_U_64_BIT
5360 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
5361 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
5362 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
5363 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
5364 unsigned long int *counts
;
5366 unsigned int no_improvement_count
= 0;
5368 /* Possible optimization parameters: if we have NSYMS symbols we say
5369 that the hashing table must at least have NSYMS/4 and at most
5371 minsize
= nsyms
/ 4;
5374 best_size
= maxsize
= nsyms
* 2;
5379 if ((best_size
& 31) == 0)
5383 /* Create array where we count the collisions in. We must use bfd_malloc
5384 since the size could be large. */
5386 amt
*= sizeof (unsigned long int);
5387 counts
= (unsigned long int *) bfd_malloc (amt
);
5391 /* Compute the "optimal" size for the hash table. The criteria is a
5392 minimal chain length. The minor criteria is (of course) the size
5394 for (i
= minsize
; i
< maxsize
; ++i
)
5396 /* Walk through the array of hashcodes and count the collisions. */
5397 BFD_HOST_U_64_BIT max
;
5398 unsigned long int j
;
5399 unsigned long int fact
;
5401 if (gnu_hash
&& (i
& 31) == 0)
5404 memset (counts
, '\0', i
* sizeof (unsigned long int));
5406 /* Determine how often each hash bucket is used. */
5407 for (j
= 0; j
< nsyms
; ++j
)
5408 ++counts
[hashcodes
[j
] % i
];
5410 /* For the weight function we need some information about the
5411 pagesize on the target. This is information need not be 100%
5412 accurate. Since this information is not available (so far) we
5413 define it here to a reasonable default value. If it is crucial
5414 to have a better value some day simply define this value. */
5415 # ifndef BFD_TARGET_PAGESIZE
5416 # define BFD_TARGET_PAGESIZE (4096)
5419 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
5421 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
5424 /* Variant 1: optimize for short chains. We add the squares
5425 of all the chain lengths (which favors many small chain
5426 over a few long chains). */
5427 for (j
= 0; j
< i
; ++j
)
5428 max
+= counts
[j
] * counts
[j
];
5430 /* This adds penalties for the overall size of the table. */
5431 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5434 /* Variant 2: Optimize a lot more for small table. Here we
5435 also add squares of the size but we also add penalties for
5436 empty slots (the +1 term). */
5437 for (j
= 0; j
< i
; ++j
)
5438 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
5440 /* The overall size of the table is considered, but not as
5441 strong as in variant 1, where it is squared. */
5442 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5446 /* Compare with current best results. */
5447 if (max
< best_chlen
)
5451 no_improvement_count
= 0;
5453 /* PR 11843: Avoid futile long searches for the best bucket size
5454 when there are a large number of symbols. */
5455 else if (++no_improvement_count
== 100)
5462 #endif /* defined (BFD_HOST_U_64_BIT) */
5464 /* This is the fallback solution if no 64bit type is available or if we
5465 are not supposed to spend much time on optimizations. We select the
5466 bucket count using a fixed set of numbers. */
5467 for (i
= 0; elf_buckets
[i
] != 0; i
++)
5469 best_size
= elf_buckets
[i
];
5470 if (nsyms
< elf_buckets
[i
+ 1])
5473 if (gnu_hash
&& best_size
< 2)
5480 /* Size any SHT_GROUP section for ld -r. */
5483 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
5487 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
5488 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
5489 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
5494 /* Set a default stack segment size. The value in INFO wins. If it
5495 is unset, LEGACY_SYMBOL's value is used, and if that symbol is
5496 undefined it is initialized. */
5499 bfd_elf_stack_segment_size (bfd
*output_bfd
,
5500 struct bfd_link_info
*info
,
5501 const char *legacy_symbol
,
5502 bfd_vma default_size
)
5504 struct elf_link_hash_entry
*h
= NULL
;
5506 /* Look for legacy symbol. */
5508 h
= elf_link_hash_lookup (elf_hash_table (info
), legacy_symbol
,
5509 FALSE
, FALSE
, FALSE
);
5510 if (h
&& (h
->root
.type
== bfd_link_hash_defined
5511 || h
->root
.type
== bfd_link_hash_defweak
)
5513 && (h
->type
== STT_NOTYPE
|| h
->type
== STT_OBJECT
))
5515 /* The symbol has no type if specified on the command line. */
5516 h
->type
= STT_OBJECT
;
5517 if (info
->stacksize
)
5518 (*_bfd_error_handler
) (_("%B: stack size specified and %s set"),
5519 output_bfd
, legacy_symbol
);
5520 else if (h
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
5521 (*_bfd_error_handler
) (_("%B: %s not absolute"),
5522 output_bfd
, legacy_symbol
);
5524 info
->stacksize
= h
->root
.u
.def
.value
;
5527 if (!info
->stacksize
)
5528 /* If the user didn't set a size, or explicitly inhibit the
5529 size, set it now. */
5530 info
->stacksize
= default_size
;
5532 /* Provide the legacy symbol, if it is referenced. */
5533 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
5534 || h
->root
.type
== bfd_link_hash_undefweak
))
5536 struct bfd_link_hash_entry
*bh
= NULL
;
5538 if (!(_bfd_generic_link_add_one_symbol
5539 (info
, output_bfd
, legacy_symbol
,
5540 BSF_GLOBAL
, bfd_abs_section_ptr
,
5541 info
->stacksize
>= 0 ? info
->stacksize
: 0,
5542 NULL
, FALSE
, get_elf_backend_data (output_bfd
)->collect
, &bh
)))
5545 h
= (struct elf_link_hash_entry
*) bh
;
5547 h
->type
= STT_OBJECT
;
5553 /* Set up the sizes and contents of the ELF dynamic sections. This is
5554 called by the ELF linker emulation before_allocation routine. We
5555 must set the sizes of the sections before the linker sets the
5556 addresses of the various sections. */
5559 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
5562 const char *filter_shlib
,
5564 const char *depaudit
,
5565 const char * const *auxiliary_filters
,
5566 struct bfd_link_info
*info
,
5567 asection
**sinterpptr
)
5569 bfd_size_type soname_indx
;
5571 const struct elf_backend_data
*bed
;
5572 struct elf_info_failed asvinfo
;
5576 soname_indx
= (bfd_size_type
) -1;
5578 if (!is_elf_hash_table (info
->hash
))
5581 bed
= get_elf_backend_data (output_bfd
);
5583 /* Any syms created from now on start with -1 in
5584 got.refcount/offset and plt.refcount/offset. */
5585 elf_hash_table (info
)->init_got_refcount
5586 = elf_hash_table (info
)->init_got_offset
;
5587 elf_hash_table (info
)->init_plt_refcount
5588 = elf_hash_table (info
)->init_plt_offset
;
5590 if (info
->relocatable
5591 && !_bfd_elf_size_group_sections (info
))
5594 /* The backend may have to create some sections regardless of whether
5595 we're dynamic or not. */
5596 if (bed
->elf_backend_always_size_sections
5597 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
5600 /* Determine any GNU_STACK segment requirements, after the backend
5601 has had a chance to set a default segment size. */
5602 if (info
->execstack
)
5603 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| PF_X
;
5604 else if (info
->noexecstack
)
5605 elf_stack_flags (output_bfd
) = PF_R
| PF_W
;
5609 asection
*notesec
= NULL
;
5612 for (inputobj
= info
->input_bfds
;
5614 inputobj
= inputobj
->link_next
)
5619 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
5621 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
5624 if (s
->flags
& SEC_CODE
)
5628 else if (bed
->default_execstack
)
5631 if (notesec
|| info
->stacksize
> 0)
5632 elf_stack_flags (output_bfd
) = PF_R
| PF_W
| exec
;
5633 if (notesec
&& exec
&& info
->relocatable
5634 && notesec
->output_section
!= bfd_abs_section_ptr
)
5635 notesec
->output_section
->flags
|= SEC_CODE
;
5638 dynobj
= elf_hash_table (info
)->dynobj
;
5640 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5642 struct elf_info_failed eif
;
5643 struct elf_link_hash_entry
*h
;
5645 struct bfd_elf_version_tree
*t
;
5646 struct bfd_elf_version_expr
*d
;
5648 bfd_boolean all_defined
;
5650 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
5651 BFD_ASSERT (*sinterpptr
!= NULL
|| !info
->executable
);
5655 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5657 if (soname_indx
== (bfd_size_type
) -1
5658 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
5664 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
5666 info
->flags
|= DF_SYMBOLIC
;
5674 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
5676 if (indx
== (bfd_size_type
) -1)
5679 tag
= info
->new_dtags
? DT_RUNPATH
: DT_RPATH
;
5680 if (!_bfd_elf_add_dynamic_entry (info
, tag
, indx
))
5684 if (filter_shlib
!= NULL
)
5688 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5689 filter_shlib
, TRUE
);
5690 if (indx
== (bfd_size_type
) -1
5691 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
5695 if (auxiliary_filters
!= NULL
)
5697 const char * const *p
;
5699 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
5703 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5705 if (indx
== (bfd_size_type
) -1
5706 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
5715 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
5717 if (indx
== (bfd_size_type
) -1
5718 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
5722 if (depaudit
!= NULL
)
5726 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
5728 if (indx
== (bfd_size_type
) -1
5729 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
5736 /* If we are supposed to export all symbols into the dynamic symbol
5737 table (this is not the normal case), then do so. */
5738 if (info
->export_dynamic
5739 || (info
->executable
&& info
->dynamic
))
5741 elf_link_hash_traverse (elf_hash_table (info
),
5742 _bfd_elf_export_symbol
,
5748 /* Make all global versions with definition. */
5749 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5750 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5751 if (!d
->symver
&& d
->literal
)
5753 const char *verstr
, *name
;
5754 size_t namelen
, verlen
, newlen
;
5755 char *newname
, *p
, leading_char
;
5756 struct elf_link_hash_entry
*newh
;
5758 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
5760 namelen
= strlen (name
) + (leading_char
!= '\0');
5762 verlen
= strlen (verstr
);
5763 newlen
= namelen
+ verlen
+ 3;
5765 newname
= (char *) bfd_malloc (newlen
);
5766 if (newname
== NULL
)
5768 newname
[0] = leading_char
;
5769 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
5771 /* Check the hidden versioned definition. */
5772 p
= newname
+ namelen
;
5774 memcpy (p
, verstr
, verlen
+ 1);
5775 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5776 newname
, FALSE
, FALSE
,
5779 || (newh
->root
.type
!= bfd_link_hash_defined
5780 && newh
->root
.type
!= bfd_link_hash_defweak
))
5782 /* Check the default versioned definition. */
5784 memcpy (p
, verstr
, verlen
+ 1);
5785 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5786 newname
, FALSE
, FALSE
,
5791 /* Mark this version if there is a definition and it is
5792 not defined in a shared object. */
5794 && !newh
->def_dynamic
5795 && (newh
->root
.type
== bfd_link_hash_defined
5796 || newh
->root
.type
== bfd_link_hash_defweak
))
5800 /* Attach all the symbols to their version information. */
5801 asvinfo
.info
= info
;
5802 asvinfo
.failed
= FALSE
;
5804 elf_link_hash_traverse (elf_hash_table (info
),
5805 _bfd_elf_link_assign_sym_version
,
5810 if (!info
->allow_undefined_version
)
5812 /* Check if all global versions have a definition. */
5814 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5815 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5816 if (d
->literal
&& !d
->symver
&& !d
->script
)
5818 (*_bfd_error_handler
)
5819 (_("%s: undefined version: %s"),
5820 d
->pattern
, t
->name
);
5821 all_defined
= FALSE
;
5826 bfd_set_error (bfd_error_bad_value
);
5831 /* Find all symbols which were defined in a dynamic object and make
5832 the backend pick a reasonable value for them. */
5833 elf_link_hash_traverse (elf_hash_table (info
),
5834 _bfd_elf_adjust_dynamic_symbol
,
5839 /* Add some entries to the .dynamic section. We fill in some of the
5840 values later, in bfd_elf_final_link, but we must add the entries
5841 now so that we know the final size of the .dynamic section. */
5843 /* If there are initialization and/or finalization functions to
5844 call then add the corresponding DT_INIT/DT_FINI entries. */
5845 h
= (info
->init_function
5846 ? elf_link_hash_lookup (elf_hash_table (info
),
5847 info
->init_function
, FALSE
,
5854 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
5857 h
= (info
->fini_function
5858 ? elf_link_hash_lookup (elf_hash_table (info
),
5859 info
->fini_function
, FALSE
,
5866 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
5870 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
5871 if (s
!= NULL
&& s
->linker_has_input
)
5873 /* DT_PREINIT_ARRAY is not allowed in shared library. */
5874 if (! info
->executable
)
5879 for (sub
= info
->input_bfds
; sub
!= NULL
;
5880 sub
= sub
->link_next
)
5881 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
)
5882 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5883 if (elf_section_data (o
)->this_hdr
.sh_type
5884 == SHT_PREINIT_ARRAY
)
5886 (*_bfd_error_handler
)
5887 (_("%B: .preinit_array section is not allowed in DSO"),
5892 bfd_set_error (bfd_error_nonrepresentable_section
);
5896 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
5897 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
5900 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
5901 if (s
!= NULL
&& s
->linker_has_input
)
5903 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
5904 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
5907 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
5908 if (s
!= NULL
&& s
->linker_has_input
)
5910 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
5911 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
5915 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
5916 /* If .dynstr is excluded from the link, we don't want any of
5917 these tags. Strictly, we should be checking each section
5918 individually; This quick check covers for the case where
5919 someone does a /DISCARD/ : { *(*) }. */
5920 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
5922 bfd_size_type strsize
;
5924 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
5925 if ((info
->emit_hash
5926 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
5927 || (info
->emit_gnu_hash
5928 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0))
5929 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
5930 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
5931 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
5932 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
5933 bed
->s
->sizeof_sym
))
5938 /* The backend must work out the sizes of all the other dynamic
5941 && bed
->elf_backend_size_dynamic_sections
!= NULL
5942 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
5945 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
5948 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5950 unsigned long section_sym_count
;
5951 struct bfd_elf_version_tree
*verdefs
;
5954 /* Set up the version definition section. */
5955 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
5956 BFD_ASSERT (s
!= NULL
);
5958 /* We may have created additional version definitions if we are
5959 just linking a regular application. */
5960 verdefs
= info
->version_info
;
5962 /* Skip anonymous version tag. */
5963 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
5964 verdefs
= verdefs
->next
;
5966 if (verdefs
== NULL
&& !info
->create_default_symver
)
5967 s
->flags
|= SEC_EXCLUDE
;
5972 struct bfd_elf_version_tree
*t
;
5974 Elf_Internal_Verdef def
;
5975 Elf_Internal_Verdaux defaux
;
5976 struct bfd_link_hash_entry
*bh
;
5977 struct elf_link_hash_entry
*h
;
5983 /* Make space for the base version. */
5984 size
+= sizeof (Elf_External_Verdef
);
5985 size
+= sizeof (Elf_External_Verdaux
);
5988 /* Make space for the default version. */
5989 if (info
->create_default_symver
)
5991 size
+= sizeof (Elf_External_Verdef
);
5995 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
5997 struct bfd_elf_version_deps
*n
;
5999 /* Don't emit base version twice. */
6003 size
+= sizeof (Elf_External_Verdef
);
6004 size
+= sizeof (Elf_External_Verdaux
);
6007 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6008 size
+= sizeof (Elf_External_Verdaux
);
6012 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6013 if (s
->contents
== NULL
&& s
->size
!= 0)
6016 /* Fill in the version definition section. */
6020 def
.vd_version
= VER_DEF_CURRENT
;
6021 def
.vd_flags
= VER_FLG_BASE
;
6024 if (info
->create_default_symver
)
6026 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6027 def
.vd_next
= sizeof (Elf_External_Verdef
);
6031 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6032 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6033 + sizeof (Elf_External_Verdaux
));
6036 if (soname_indx
!= (bfd_size_type
) -1)
6038 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6040 def
.vd_hash
= bfd_elf_hash (soname
);
6041 defaux
.vda_name
= soname_indx
;
6048 name
= lbasename (output_bfd
->filename
);
6049 def
.vd_hash
= bfd_elf_hash (name
);
6050 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6052 if (indx
== (bfd_size_type
) -1)
6054 defaux
.vda_name
= indx
;
6056 defaux
.vda_next
= 0;
6058 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6059 (Elf_External_Verdef
*) p
);
6060 p
+= sizeof (Elf_External_Verdef
);
6061 if (info
->create_default_symver
)
6063 /* Add a symbol representing this version. */
6065 if (! (_bfd_generic_link_add_one_symbol
6066 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6068 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6070 h
= (struct elf_link_hash_entry
*) bh
;
6073 h
->type
= STT_OBJECT
;
6074 h
->verinfo
.vertree
= NULL
;
6076 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6079 /* Create a duplicate of the base version with the same
6080 aux block, but different flags. */
6083 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6085 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6086 + sizeof (Elf_External_Verdaux
));
6089 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6090 (Elf_External_Verdef
*) p
);
6091 p
+= sizeof (Elf_External_Verdef
);
6093 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6094 (Elf_External_Verdaux
*) p
);
6095 p
+= sizeof (Elf_External_Verdaux
);
6097 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6100 struct bfd_elf_version_deps
*n
;
6102 /* Don't emit the base version twice. */
6107 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6110 /* Add a symbol representing this version. */
6112 if (! (_bfd_generic_link_add_one_symbol
6113 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6115 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6117 h
= (struct elf_link_hash_entry
*) bh
;
6120 h
->type
= STT_OBJECT
;
6121 h
->verinfo
.vertree
= t
;
6123 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6126 def
.vd_version
= VER_DEF_CURRENT
;
6128 if (t
->globals
.list
== NULL
6129 && t
->locals
.list
== NULL
6131 def
.vd_flags
|= VER_FLG_WEAK
;
6132 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6133 def
.vd_cnt
= cdeps
+ 1;
6134 def
.vd_hash
= bfd_elf_hash (t
->name
);
6135 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6138 /* If a basever node is next, it *must* be the last node in
6139 the chain, otherwise Verdef construction breaks. */
6140 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6141 BFD_ASSERT (t
->next
->next
== NULL
);
6143 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6144 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6145 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6147 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6148 (Elf_External_Verdef
*) p
);
6149 p
+= sizeof (Elf_External_Verdef
);
6151 defaux
.vda_name
= h
->dynstr_index
;
6152 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6154 defaux
.vda_next
= 0;
6155 if (t
->deps
!= NULL
)
6156 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6157 t
->name_indx
= defaux
.vda_name
;
6159 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6160 (Elf_External_Verdaux
*) p
);
6161 p
+= sizeof (Elf_External_Verdaux
);
6163 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6165 if (n
->version_needed
== NULL
)
6167 /* This can happen if there was an error in the
6169 defaux
.vda_name
= 0;
6173 defaux
.vda_name
= n
->version_needed
->name_indx
;
6174 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6177 if (n
->next
== NULL
)
6178 defaux
.vda_next
= 0;
6180 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6182 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6183 (Elf_External_Verdaux
*) p
);
6184 p
+= sizeof (Elf_External_Verdaux
);
6188 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
6189 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
6192 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6195 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
6197 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
6200 else if (info
->flags
& DF_BIND_NOW
)
6202 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
6208 if (info
->executable
)
6209 info
->flags_1
&= ~ (DF_1_INITFIRST
6212 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
6216 /* Work out the size of the version reference section. */
6218 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6219 BFD_ASSERT (s
!= NULL
);
6221 struct elf_find_verdep_info sinfo
;
6224 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6225 if (sinfo
.vers
== 0)
6227 sinfo
.failed
= FALSE
;
6229 elf_link_hash_traverse (elf_hash_table (info
),
6230 _bfd_elf_link_find_version_dependencies
,
6235 if (elf_tdata (output_bfd
)->verref
== NULL
)
6236 s
->flags
|= SEC_EXCLUDE
;
6239 Elf_Internal_Verneed
*t
;
6244 /* Build the version dependency section. */
6247 for (t
= elf_tdata (output_bfd
)->verref
;
6251 Elf_Internal_Vernaux
*a
;
6253 size
+= sizeof (Elf_External_Verneed
);
6255 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6256 size
+= sizeof (Elf_External_Vernaux
);
6260 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6261 if (s
->contents
== NULL
)
6265 for (t
= elf_tdata (output_bfd
)->verref
;
6270 Elf_Internal_Vernaux
*a
;
6274 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6277 t
->vn_version
= VER_NEED_CURRENT
;
6279 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6280 elf_dt_name (t
->vn_bfd
) != NULL
6281 ? elf_dt_name (t
->vn_bfd
)
6282 : lbasename (t
->vn_bfd
->filename
),
6284 if (indx
== (bfd_size_type
) -1)
6287 t
->vn_aux
= sizeof (Elf_External_Verneed
);
6288 if (t
->vn_nextref
== NULL
)
6291 t
->vn_next
= (sizeof (Elf_External_Verneed
)
6292 + caux
* sizeof (Elf_External_Vernaux
));
6294 _bfd_elf_swap_verneed_out (output_bfd
, t
,
6295 (Elf_External_Verneed
*) p
);
6296 p
+= sizeof (Elf_External_Verneed
);
6298 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6300 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6301 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6302 a
->vna_nodename
, FALSE
);
6303 if (indx
== (bfd_size_type
) -1)
6306 if (a
->vna_nextptr
== NULL
)
6309 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6311 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6312 (Elf_External_Vernaux
*) p
);
6313 p
+= sizeof (Elf_External_Vernaux
);
6317 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
6318 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
6321 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6325 if ((elf_tdata (output_bfd
)->cverrefs
== 0
6326 && elf_tdata (output_bfd
)->cverdefs
== 0)
6327 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6328 §ion_sym_count
) == 0)
6330 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6331 s
->flags
|= SEC_EXCLUDE
;
6337 /* Find the first non-excluded output section. We'll use its
6338 section symbol for some emitted relocs. */
6340 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
6344 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6345 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
6346 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6348 elf_hash_table (info
)->text_index_section
= s
;
6353 /* Find two non-excluded output sections, one for code, one for data.
6354 We'll use their section symbols for some emitted relocs. */
6356 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
6360 /* Data first, since setting text_index_section changes
6361 _bfd_elf_link_omit_section_dynsym. */
6362 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6363 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
)) == SEC_ALLOC
)
6364 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6366 elf_hash_table (info
)->data_index_section
= s
;
6370 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6371 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
))
6372 == (SEC_ALLOC
| SEC_READONLY
))
6373 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6375 elf_hash_table (info
)->text_index_section
= s
;
6379 if (elf_hash_table (info
)->text_index_section
== NULL
)
6380 elf_hash_table (info
)->text_index_section
6381 = elf_hash_table (info
)->data_index_section
;
6385 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
6387 const struct elf_backend_data
*bed
;
6389 if (!is_elf_hash_table (info
->hash
))
6392 bed
= get_elf_backend_data (output_bfd
);
6393 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
6395 if (elf_hash_table (info
)->dynamic_sections_created
)
6399 bfd_size_type dynsymcount
;
6400 unsigned long section_sym_count
;
6401 unsigned int dtagcount
;
6403 dynobj
= elf_hash_table (info
)->dynobj
;
6405 /* Assign dynsym indicies. In a shared library we generate a
6406 section symbol for each output section, which come first.
6407 Next come all of the back-end allocated local dynamic syms,
6408 followed by the rest of the global symbols. */
6410 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6411 §ion_sym_count
);
6413 /* Work out the size of the symbol version section. */
6414 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6415 BFD_ASSERT (s
!= NULL
);
6416 if (dynsymcount
!= 0
6417 && (s
->flags
& SEC_EXCLUDE
) == 0)
6419 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
6420 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6421 if (s
->contents
== NULL
)
6424 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
6428 /* Set the size of the .dynsym and .hash sections. We counted
6429 the number of dynamic symbols in elf_link_add_object_symbols.
6430 We will build the contents of .dynsym and .hash when we build
6431 the final symbol table, because until then we do not know the
6432 correct value to give the symbols. We built the .dynstr
6433 section as we went along in elf_link_add_object_symbols. */
6434 s
= bfd_get_linker_section (dynobj
, ".dynsym");
6435 BFD_ASSERT (s
!= NULL
);
6436 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
6438 if (dynsymcount
!= 0)
6440 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6441 if (s
->contents
== NULL
)
6444 /* The first entry in .dynsym is a dummy symbol.
6445 Clear all the section syms, in case we don't output them all. */
6446 ++section_sym_count
;
6447 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
6450 elf_hash_table (info
)->bucketcount
= 0;
6452 /* Compute the size of the hashing table. As a side effect this
6453 computes the hash values for all the names we export. */
6454 if (info
->emit_hash
)
6456 unsigned long int *hashcodes
;
6457 struct hash_codes_info hashinf
;
6459 unsigned long int nsyms
;
6461 size_t hash_entry_size
;
6463 /* Compute the hash values for all exported symbols. At the same
6464 time store the values in an array so that we could use them for
6466 amt
= dynsymcount
* sizeof (unsigned long int);
6467 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
6468 if (hashcodes
== NULL
)
6470 hashinf
.hashcodes
= hashcodes
;
6471 hashinf
.error
= FALSE
;
6473 /* Put all hash values in HASHCODES. */
6474 elf_link_hash_traverse (elf_hash_table (info
),
6475 elf_collect_hash_codes
, &hashinf
);
6482 nsyms
= hashinf
.hashcodes
- hashcodes
;
6484 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
6487 if (bucketcount
== 0)
6490 elf_hash_table (info
)->bucketcount
= bucketcount
;
6492 s
= bfd_get_linker_section (dynobj
, ".hash");
6493 BFD_ASSERT (s
!= NULL
);
6494 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
6495 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
6496 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6497 if (s
->contents
== NULL
)
6500 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
6501 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
6502 s
->contents
+ hash_entry_size
);
6505 if (info
->emit_gnu_hash
)
6508 unsigned char *contents
;
6509 struct collect_gnu_hash_codes cinfo
;
6513 memset (&cinfo
, 0, sizeof (cinfo
));
6515 /* Compute the hash values for all exported symbols. At the same
6516 time store the values in an array so that we could use them for
6518 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
6519 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
6520 if (cinfo
.hashcodes
== NULL
)
6523 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
6524 cinfo
.min_dynindx
= -1;
6525 cinfo
.output_bfd
= output_bfd
;
6528 /* Put all hash values in HASHCODES. */
6529 elf_link_hash_traverse (elf_hash_table (info
),
6530 elf_collect_gnu_hash_codes
, &cinfo
);
6533 free (cinfo
.hashcodes
);
6538 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
6540 if (bucketcount
== 0)
6542 free (cinfo
.hashcodes
);
6546 s
= bfd_get_linker_section (dynobj
, ".gnu.hash");
6547 BFD_ASSERT (s
!= NULL
);
6549 if (cinfo
.nsyms
== 0)
6551 /* Empty .gnu.hash section is special. */
6552 BFD_ASSERT (cinfo
.min_dynindx
== -1);
6553 free (cinfo
.hashcodes
);
6554 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
6555 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6556 if (contents
== NULL
)
6558 s
->contents
= contents
;
6559 /* 1 empty bucket. */
6560 bfd_put_32 (output_bfd
, 1, contents
);
6561 /* SYMIDX above the special symbol 0. */
6562 bfd_put_32 (output_bfd
, 1, contents
+ 4);
6563 /* Just one word for bitmask. */
6564 bfd_put_32 (output_bfd
, 1, contents
+ 8);
6565 /* Only hash fn bloom filter. */
6566 bfd_put_32 (output_bfd
, 0, contents
+ 12);
6567 /* No hashes are valid - empty bitmask. */
6568 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
6569 /* No hashes in the only bucket. */
6570 bfd_put_32 (output_bfd
, 0,
6571 contents
+ 16 + bed
->s
->arch_size
/ 8);
6575 unsigned long int maskwords
, maskbitslog2
, x
;
6576 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
6580 while ((x
>>= 1) != 0)
6582 if (maskbitslog2
< 3)
6584 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
6585 maskbitslog2
= maskbitslog2
+ 3;
6587 maskbitslog2
= maskbitslog2
+ 2;
6588 if (bed
->s
->arch_size
== 64)
6590 if (maskbitslog2
== 5)
6596 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
6597 cinfo
.shift2
= maskbitslog2
;
6598 cinfo
.maskbits
= 1 << maskbitslog2
;
6599 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
6600 amt
= bucketcount
* sizeof (unsigned long int) * 2;
6601 amt
+= maskwords
* sizeof (bfd_vma
);
6602 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
6603 if (cinfo
.bitmask
== NULL
)
6605 free (cinfo
.hashcodes
);
6609 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
6610 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
6611 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
6612 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
6614 /* Determine how often each hash bucket is used. */
6615 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
6616 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
6617 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
6619 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
6620 if (cinfo
.counts
[i
] != 0)
6622 cinfo
.indx
[i
] = cnt
;
6623 cnt
+= cinfo
.counts
[i
];
6625 BFD_ASSERT (cnt
== dynsymcount
);
6626 cinfo
.bucketcount
= bucketcount
;
6627 cinfo
.local_indx
= cinfo
.min_dynindx
;
6629 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
6630 s
->size
+= cinfo
.maskbits
/ 8;
6631 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6632 if (contents
== NULL
)
6634 free (cinfo
.bitmask
);
6635 free (cinfo
.hashcodes
);
6639 s
->contents
= contents
;
6640 bfd_put_32 (output_bfd
, bucketcount
, contents
);
6641 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
6642 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
6643 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
6644 contents
+= 16 + cinfo
.maskbits
/ 8;
6646 for (i
= 0; i
< bucketcount
; ++i
)
6648 if (cinfo
.counts
[i
] == 0)
6649 bfd_put_32 (output_bfd
, 0, contents
);
6651 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
6655 cinfo
.contents
= contents
;
6657 /* Renumber dynamic symbols, populate .gnu.hash section. */
6658 elf_link_hash_traverse (elf_hash_table (info
),
6659 elf_renumber_gnu_hash_syms
, &cinfo
);
6661 contents
= s
->contents
+ 16;
6662 for (i
= 0; i
< maskwords
; ++i
)
6664 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
6666 contents
+= bed
->s
->arch_size
/ 8;
6669 free (cinfo
.bitmask
);
6670 free (cinfo
.hashcodes
);
6674 s
= bfd_get_linker_section (dynobj
, ".dynstr");
6675 BFD_ASSERT (s
!= NULL
);
6677 elf_finalize_dynstr (output_bfd
, info
);
6679 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6681 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
6682 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
6689 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
6692 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
6695 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
6696 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
6699 /* Finish SHF_MERGE section merging. */
6702 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
6707 if (!is_elf_hash_table (info
->hash
))
6710 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
6711 if ((ibfd
->flags
& DYNAMIC
) == 0)
6712 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6713 if ((sec
->flags
& SEC_MERGE
) != 0
6714 && !bfd_is_abs_section (sec
->output_section
))
6716 struct bfd_elf_section_data
*secdata
;
6718 secdata
= elf_section_data (sec
);
6719 if (! _bfd_add_merge_section (abfd
,
6720 &elf_hash_table (info
)->merge_info
,
6721 sec
, &secdata
->sec_info
))
6723 else if (secdata
->sec_info
)
6724 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
6727 if (elf_hash_table (info
)->merge_info
!= NULL
)
6728 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
6729 merge_sections_remove_hook
);
6733 /* Create an entry in an ELF linker hash table. */
6735 struct bfd_hash_entry
*
6736 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
6737 struct bfd_hash_table
*table
,
6740 /* Allocate the structure if it has not already been allocated by a
6744 entry
= (struct bfd_hash_entry
*)
6745 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
6750 /* Call the allocation method of the superclass. */
6751 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
6754 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
6755 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
6757 /* Set local fields. */
6760 ret
->got
= htab
->init_got_refcount
;
6761 ret
->plt
= htab
->init_plt_refcount
;
6762 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
6763 - offsetof (struct elf_link_hash_entry
, size
)));
6764 /* Assume that we have been called by a non-ELF symbol reader.
6765 This flag is then reset by the code which reads an ELF input
6766 file. This ensures that a symbol created by a non-ELF symbol
6767 reader will have the flag set correctly. */
6774 /* Copy data from an indirect symbol to its direct symbol, hiding the
6775 old indirect symbol. Also used for copying flags to a weakdef. */
6778 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
6779 struct elf_link_hash_entry
*dir
,
6780 struct elf_link_hash_entry
*ind
)
6782 struct elf_link_hash_table
*htab
;
6784 /* Copy down any references that we may have already seen to the
6785 symbol which just became indirect. */
6787 dir
->ref_dynamic
|= ind
->ref_dynamic
;
6788 dir
->ref_regular
|= ind
->ref_regular
;
6789 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
6790 dir
->non_got_ref
|= ind
->non_got_ref
;
6791 dir
->needs_plt
|= ind
->needs_plt
;
6792 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
6794 if (ind
->root
.type
!= bfd_link_hash_indirect
)
6797 /* Copy over the global and procedure linkage table refcount entries.
6798 These may have been already set up by a check_relocs routine. */
6799 htab
= elf_hash_table (info
);
6800 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
6802 if (dir
->got
.refcount
< 0)
6803 dir
->got
.refcount
= 0;
6804 dir
->got
.refcount
+= ind
->got
.refcount
;
6805 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
6808 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
6810 if (dir
->plt
.refcount
< 0)
6811 dir
->plt
.refcount
= 0;
6812 dir
->plt
.refcount
+= ind
->plt
.refcount
;
6813 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
6816 if (ind
->dynindx
!= -1)
6818 if (dir
->dynindx
!= -1)
6819 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
6820 dir
->dynindx
= ind
->dynindx
;
6821 dir
->dynstr_index
= ind
->dynstr_index
;
6823 ind
->dynstr_index
= 0;
6828 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
6829 struct elf_link_hash_entry
*h
,
6830 bfd_boolean force_local
)
6832 /* STT_GNU_IFUNC symbol must go through PLT. */
6833 if (h
->type
!= STT_GNU_IFUNC
)
6835 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
6840 h
->forced_local
= 1;
6841 if (h
->dynindx
!= -1)
6844 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
6850 /* Initialize an ELF linker hash table. *TABLE has been zeroed by our
6854 _bfd_elf_link_hash_table_init
6855 (struct elf_link_hash_table
*table
,
6857 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
6858 struct bfd_hash_table
*,
6860 unsigned int entsize
,
6861 enum elf_target_id target_id
)
6864 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
6866 table
->init_got_refcount
.refcount
= can_refcount
- 1;
6867 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
6868 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
6869 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
6870 /* The first dynamic symbol is a dummy. */
6871 table
->dynsymcount
= 1;
6873 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
6875 table
->root
.type
= bfd_link_elf_hash_table
;
6876 table
->hash_table_id
= target_id
;
6881 /* Create an ELF linker hash table. */
6883 struct bfd_link_hash_table
*
6884 _bfd_elf_link_hash_table_create (bfd
*abfd
)
6886 struct elf_link_hash_table
*ret
;
6887 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
6889 ret
= (struct elf_link_hash_table
*) bfd_zmalloc (amt
);
6893 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
6894 sizeof (struct elf_link_hash_entry
),
6904 /* Destroy an ELF linker hash table. */
6907 _bfd_elf_link_hash_table_free (struct bfd_link_hash_table
*hash
)
6909 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) hash
;
6910 if (htab
->dynstr
!= NULL
)
6911 _bfd_elf_strtab_free (htab
->dynstr
);
6912 _bfd_merge_sections_free (htab
->merge_info
);
6913 _bfd_generic_link_hash_table_free (hash
);
6916 /* This is a hook for the ELF emulation code in the generic linker to
6917 tell the backend linker what file name to use for the DT_NEEDED
6918 entry for a dynamic object. */
6921 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
6923 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6924 && bfd_get_format (abfd
) == bfd_object
)
6925 elf_dt_name (abfd
) = name
;
6929 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
6932 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6933 && bfd_get_format (abfd
) == bfd_object
)
6934 lib_class
= elf_dyn_lib_class (abfd
);
6941 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
6943 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6944 && bfd_get_format (abfd
) == bfd_object
)
6945 elf_dyn_lib_class (abfd
) = lib_class
;
6948 /* Get the list of DT_NEEDED entries for a link. This is a hook for
6949 the linker ELF emulation code. */
6951 struct bfd_link_needed_list
*
6952 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6953 struct bfd_link_info
*info
)
6955 if (! is_elf_hash_table (info
->hash
))
6957 return elf_hash_table (info
)->needed
;
6960 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
6961 hook for the linker ELF emulation code. */
6963 struct bfd_link_needed_list
*
6964 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6965 struct bfd_link_info
*info
)
6967 if (! is_elf_hash_table (info
->hash
))
6969 return elf_hash_table (info
)->runpath
;
6972 /* Get the name actually used for a dynamic object for a link. This
6973 is the SONAME entry if there is one. Otherwise, it is the string
6974 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
6977 bfd_elf_get_dt_soname (bfd
*abfd
)
6979 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6980 && bfd_get_format (abfd
) == bfd_object
)
6981 return elf_dt_name (abfd
);
6985 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
6986 the ELF linker emulation code. */
6989 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
6990 struct bfd_link_needed_list
**pneeded
)
6993 bfd_byte
*dynbuf
= NULL
;
6994 unsigned int elfsec
;
6995 unsigned long shlink
;
6996 bfd_byte
*extdyn
, *extdynend
;
6998 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
7002 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
7003 || bfd_get_format (abfd
) != bfd_object
)
7006 s
= bfd_get_section_by_name (abfd
, ".dynamic");
7007 if (s
== NULL
|| s
->size
== 0)
7010 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
7013 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
7014 if (elfsec
== SHN_BAD
)
7017 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
7019 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
7020 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
7023 extdynend
= extdyn
+ s
->size
;
7024 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
7026 Elf_Internal_Dyn dyn
;
7028 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
7030 if (dyn
.d_tag
== DT_NULL
)
7033 if (dyn
.d_tag
== DT_NEEDED
)
7036 struct bfd_link_needed_list
*l
;
7037 unsigned int tagv
= dyn
.d_un
.d_val
;
7040 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
7045 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
7066 struct elf_symbuf_symbol
7068 unsigned long st_name
; /* Symbol name, index in string tbl */
7069 unsigned char st_info
; /* Type and binding attributes */
7070 unsigned char st_other
; /* Visibilty, and target specific */
7073 struct elf_symbuf_head
7075 struct elf_symbuf_symbol
*ssym
;
7076 bfd_size_type count
;
7077 unsigned int st_shndx
;
7084 Elf_Internal_Sym
*isym
;
7085 struct elf_symbuf_symbol
*ssym
;
7090 /* Sort references to symbols by ascending section number. */
7093 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7095 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
7096 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
7098 return s1
->st_shndx
- s2
->st_shndx
;
7102 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7104 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7105 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7106 return strcmp (s1
->name
, s2
->name
);
7109 static struct elf_symbuf_head
*
7110 elf_create_symbuf (bfd_size_type symcount
, Elf_Internal_Sym
*isymbuf
)
7112 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
7113 struct elf_symbuf_symbol
*ssym
;
7114 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
7115 bfd_size_type i
, shndx_count
, total_size
;
7117 indbuf
= (Elf_Internal_Sym
**) bfd_malloc2 (symcount
, sizeof (*indbuf
));
7121 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
7122 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
)
7123 *ind
++ = &isymbuf
[i
];
7126 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
7127 elf_sort_elf_symbol
);
7130 if (indbufend
> indbuf
)
7131 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
7132 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
7135 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
7136 + (indbufend
- indbuf
) * sizeof (*ssym
));
7137 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
7138 if (ssymbuf
== NULL
)
7144 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
7145 ssymbuf
->ssym
= NULL
;
7146 ssymbuf
->count
= shndx_count
;
7147 ssymbuf
->st_shndx
= 0;
7148 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
7150 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
7153 ssymhead
->ssym
= ssym
;
7154 ssymhead
->count
= 0;
7155 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
7157 ssym
->st_name
= (*ind
)->st_name
;
7158 ssym
->st_info
= (*ind
)->st_info
;
7159 ssym
->st_other
= (*ind
)->st_other
;
7162 BFD_ASSERT ((bfd_size_type
) (ssymhead
- ssymbuf
) == shndx_count
7163 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
7170 /* Check if 2 sections define the same set of local and global
7174 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
7175 struct bfd_link_info
*info
)
7178 const struct elf_backend_data
*bed1
, *bed2
;
7179 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7180 bfd_size_type symcount1
, symcount2
;
7181 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7182 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
7183 Elf_Internal_Sym
*isym
, *isymend
;
7184 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
7185 bfd_size_type count1
, count2
, i
;
7186 unsigned int shndx1
, shndx2
;
7192 /* Both sections have to be in ELF. */
7193 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7194 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7197 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7200 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7201 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7202 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
7205 bed1
= get_elf_backend_data (bfd1
);
7206 bed2
= get_elf_backend_data (bfd2
);
7207 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7208 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7209 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7210 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7212 if (symcount1
== 0 || symcount2
== 0)
7218 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
7219 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
7221 if (ssymbuf1
== NULL
)
7223 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7225 if (isymbuf1
== NULL
)
7228 if (!info
->reduce_memory_overheads
)
7229 elf_tdata (bfd1
)->symbuf
= ssymbuf1
7230 = elf_create_symbuf (symcount1
, isymbuf1
);
7233 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
7235 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7237 if (isymbuf2
== NULL
)
7240 if (ssymbuf1
!= NULL
&& !info
->reduce_memory_overheads
)
7241 elf_tdata (bfd2
)->symbuf
= ssymbuf2
7242 = elf_create_symbuf (symcount2
, isymbuf2
);
7245 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
7247 /* Optimized faster version. */
7248 bfd_size_type lo
, hi
, mid
;
7249 struct elf_symbol
*symp
;
7250 struct elf_symbuf_symbol
*ssym
, *ssymend
;
7253 hi
= ssymbuf1
->count
;
7258 mid
= (lo
+ hi
) / 2;
7259 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
7261 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
7265 count1
= ssymbuf1
[mid
].count
;
7272 hi
= ssymbuf2
->count
;
7277 mid
= (lo
+ hi
) / 2;
7278 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
7280 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
7284 count2
= ssymbuf2
[mid
].count
;
7290 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7293 symtable1
= (struct elf_symbol
*)
7294 bfd_malloc (count1
* sizeof (struct elf_symbol
));
7295 symtable2
= (struct elf_symbol
*)
7296 bfd_malloc (count2
* sizeof (struct elf_symbol
));
7297 if (symtable1
== NULL
|| symtable2
== NULL
)
7301 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
7302 ssym
< ssymend
; ssym
++, symp
++)
7304 symp
->u
.ssym
= ssym
;
7305 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
7311 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
7312 ssym
< ssymend
; ssym
++, symp
++)
7314 symp
->u
.ssym
= ssym
;
7315 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
7320 /* Sort symbol by name. */
7321 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7322 elf_sym_name_compare
);
7323 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7324 elf_sym_name_compare
);
7326 for (i
= 0; i
< count1
; i
++)
7327 /* Two symbols must have the same binding, type and name. */
7328 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
7329 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
7330 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7337 symtable1
= (struct elf_symbol
*)
7338 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
7339 symtable2
= (struct elf_symbol
*)
7340 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
7341 if (symtable1
== NULL
|| symtable2
== NULL
)
7344 /* Count definitions in the section. */
7346 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
7347 if (isym
->st_shndx
== shndx1
)
7348 symtable1
[count1
++].u
.isym
= isym
;
7351 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
7352 if (isym
->st_shndx
== shndx2
)
7353 symtable2
[count2
++].u
.isym
= isym
;
7355 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7358 for (i
= 0; i
< count1
; i
++)
7360 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
7361 symtable1
[i
].u
.isym
->st_name
);
7363 for (i
= 0; i
< count2
; i
++)
7365 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
7366 symtable2
[i
].u
.isym
->st_name
);
7368 /* Sort symbol by name. */
7369 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7370 elf_sym_name_compare
);
7371 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7372 elf_sym_name_compare
);
7374 for (i
= 0; i
< count1
; i
++)
7375 /* Two symbols must have the same binding, type and name. */
7376 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
7377 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
7378 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7396 /* Return TRUE if 2 section types are compatible. */
7399 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
7400 bfd
*bbfd
, const asection
*bsec
)
7404 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
7405 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7408 return elf_section_type (asec
) == elf_section_type (bsec
);
7411 /* Final phase of ELF linker. */
7413 /* A structure we use to avoid passing large numbers of arguments. */
7415 struct elf_final_link_info
7417 /* General link information. */
7418 struct bfd_link_info
*info
;
7421 /* Symbol string table. */
7422 struct bfd_strtab_hash
*symstrtab
;
7423 /* .dynsym section. */
7424 asection
*dynsym_sec
;
7425 /* .hash section. */
7427 /* symbol version section (.gnu.version). */
7428 asection
*symver_sec
;
7429 /* Buffer large enough to hold contents of any section. */
7431 /* Buffer large enough to hold external relocs of any section. */
7432 void *external_relocs
;
7433 /* Buffer large enough to hold internal relocs of any section. */
7434 Elf_Internal_Rela
*internal_relocs
;
7435 /* Buffer large enough to hold external local symbols of any input
7437 bfd_byte
*external_syms
;
7438 /* And a buffer for symbol section indices. */
7439 Elf_External_Sym_Shndx
*locsym_shndx
;
7440 /* Buffer large enough to hold internal local symbols of any input
7442 Elf_Internal_Sym
*internal_syms
;
7443 /* Array large enough to hold a symbol index for each local symbol
7444 of any input BFD. */
7446 /* Array large enough to hold a section pointer for each local
7447 symbol of any input BFD. */
7448 asection
**sections
;
7449 /* Buffer to hold swapped out symbols. */
7451 /* And one for symbol section indices. */
7452 Elf_External_Sym_Shndx
*symshndxbuf
;
7453 /* Number of swapped out symbols in buffer. */
7454 size_t symbuf_count
;
7455 /* Number of symbols which fit in symbuf. */
7457 /* And same for symshndxbuf. */
7458 size_t shndxbuf_size
;
7459 /* Number of STT_FILE syms seen. */
7460 size_t filesym_count
;
7463 /* This struct is used to pass information to elf_link_output_extsym. */
7465 struct elf_outext_info
7468 bfd_boolean localsyms
;
7469 bfd_boolean need_second_pass
;
7470 bfd_boolean second_pass
;
7471 bfd_boolean file_sym_done
;
7472 struct elf_final_link_info
*flinfo
;
7476 /* Support for evaluating a complex relocation.
7478 Complex relocations are generalized, self-describing relocations. The
7479 implementation of them consists of two parts: complex symbols, and the
7480 relocations themselves.
7482 The relocations are use a reserved elf-wide relocation type code (R_RELC
7483 external / BFD_RELOC_RELC internal) and an encoding of relocation field
7484 information (start bit, end bit, word width, etc) into the addend. This
7485 information is extracted from CGEN-generated operand tables within gas.
7487 Complex symbols are mangled symbols (BSF_RELC external / STT_RELC
7488 internal) representing prefix-notation expressions, including but not
7489 limited to those sorts of expressions normally encoded as addends in the
7490 addend field. The symbol mangling format is:
7493 | <unary-operator> ':' <node>
7494 | <binary-operator> ':' <node> ':' <node>
7497 <literal> := 's' <digits=N> ':' <N character symbol name>
7498 | 'S' <digits=N> ':' <N character section name>
7502 <binary-operator> := as in C
7503 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
7506 set_symbol_value (bfd
*bfd_with_globals
,
7507 Elf_Internal_Sym
*isymbuf
,
7512 struct elf_link_hash_entry
**sym_hashes
;
7513 struct elf_link_hash_entry
*h
;
7514 size_t extsymoff
= locsymcount
;
7516 if (symidx
< locsymcount
)
7518 Elf_Internal_Sym
*sym
;
7520 sym
= isymbuf
+ symidx
;
7521 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
7523 /* It is a local symbol: move it to the
7524 "absolute" section and give it a value. */
7525 sym
->st_shndx
= SHN_ABS
;
7526 sym
->st_value
= val
;
7529 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
7533 /* It is a global symbol: set its link type
7534 to "defined" and give it a value. */
7536 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
7537 h
= sym_hashes
[symidx
- extsymoff
];
7538 while (h
->root
.type
== bfd_link_hash_indirect
7539 || h
->root
.type
== bfd_link_hash_warning
)
7540 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7541 h
->root
.type
= bfd_link_hash_defined
;
7542 h
->root
.u
.def
.value
= val
;
7543 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
7547 resolve_symbol (const char *name
,
7549 struct elf_final_link_info
*flinfo
,
7551 Elf_Internal_Sym
*isymbuf
,
7554 Elf_Internal_Sym
*sym
;
7555 struct bfd_link_hash_entry
*global_entry
;
7556 const char *candidate
= NULL
;
7557 Elf_Internal_Shdr
*symtab_hdr
;
7560 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
7562 for (i
= 0; i
< locsymcount
; ++ i
)
7566 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
7569 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
7570 symtab_hdr
->sh_link
,
7573 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
7574 name
, candidate
, (unsigned long) sym
->st_value
);
7576 if (candidate
&& strcmp (candidate
, name
) == 0)
7578 asection
*sec
= flinfo
->sections
[i
];
7580 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
7581 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
7583 printf ("Found symbol with value %8.8lx\n",
7584 (unsigned long) *result
);
7590 /* Hmm, haven't found it yet. perhaps it is a global. */
7591 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
7592 FALSE
, FALSE
, TRUE
);
7596 if (global_entry
->type
== bfd_link_hash_defined
7597 || global_entry
->type
== bfd_link_hash_defweak
)
7599 *result
= (global_entry
->u
.def
.value
7600 + global_entry
->u
.def
.section
->output_section
->vma
7601 + global_entry
->u
.def
.section
->output_offset
);
7603 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
7604 global_entry
->root
.string
, (unsigned long) *result
);
7613 resolve_section (const char *name
,
7620 for (curr
= sections
; curr
; curr
= curr
->next
)
7621 if (strcmp (curr
->name
, name
) == 0)
7623 *result
= curr
->vma
;
7627 /* Hmm. still haven't found it. try pseudo-section names. */
7628 for (curr
= sections
; curr
; curr
= curr
->next
)
7630 len
= strlen (curr
->name
);
7631 if (len
> strlen (name
))
7634 if (strncmp (curr
->name
, name
, len
) == 0)
7636 if (strncmp (".end", name
+ len
, 4) == 0)
7638 *result
= curr
->vma
+ curr
->size
;
7642 /* Insert more pseudo-section names here, if you like. */
7650 undefined_reference (const char *reftype
, const char *name
)
7652 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
7657 eval_symbol (bfd_vma
*result
,
7660 struct elf_final_link_info
*flinfo
,
7662 Elf_Internal_Sym
*isymbuf
,
7671 const char *sym
= *symp
;
7673 bfd_boolean symbol_is_section
= FALSE
;
7678 if (len
< 1 || len
> sizeof (symbuf
))
7680 bfd_set_error (bfd_error_invalid_operation
);
7693 *result
= strtoul (sym
, (char **) symp
, 16);
7697 symbol_is_section
= TRUE
;
7700 symlen
= strtol (sym
, (char **) symp
, 10);
7701 sym
= *symp
+ 1; /* Skip the trailing ':'. */
7703 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
7705 bfd_set_error (bfd_error_invalid_operation
);
7709 memcpy (symbuf
, sym
, symlen
);
7710 symbuf
[symlen
] = '\0';
7711 *symp
= sym
+ symlen
;
7713 /* Is it always possible, with complex symbols, that gas "mis-guessed"
7714 the symbol as a section, or vice-versa. so we're pretty liberal in our
7715 interpretation here; section means "try section first", not "must be a
7716 section", and likewise with symbol. */
7718 if (symbol_is_section
)
7720 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
)
7721 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7722 isymbuf
, locsymcount
))
7724 undefined_reference ("section", symbuf
);
7730 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7731 isymbuf
, locsymcount
)
7732 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
7735 undefined_reference ("symbol", symbuf
);
7742 /* All that remains are operators. */
7744 #define UNARY_OP(op) \
7745 if (strncmp (sym, #op, strlen (#op)) == 0) \
7747 sym += strlen (#op); \
7751 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7752 isymbuf, locsymcount, signed_p)) \
7755 *result = op ((bfd_signed_vma) a); \
7761 #define BINARY_OP(op) \
7762 if (strncmp (sym, #op, strlen (#op)) == 0) \
7764 sym += strlen (#op); \
7768 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7769 isymbuf, locsymcount, signed_p)) \
7772 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
7773 isymbuf, locsymcount, signed_p)) \
7776 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
7806 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
7807 bfd_set_error (bfd_error_invalid_operation
);
7813 put_value (bfd_vma size
,
7814 unsigned long chunksz
,
7819 location
+= (size
- chunksz
);
7821 for (; size
; size
-= chunksz
, location
-= chunksz
, x
>>= (chunksz
* 8))
7829 bfd_put_8 (input_bfd
, x
, location
);
7832 bfd_put_16 (input_bfd
, x
, location
);
7835 bfd_put_32 (input_bfd
, x
, location
);
7839 bfd_put_64 (input_bfd
, x
, location
);
7849 get_value (bfd_vma size
,
7850 unsigned long chunksz
,
7857 /* Sanity checks. */
7858 BFD_ASSERT (chunksz
<= sizeof (x
)
7861 && (size
% chunksz
) == 0
7862 && input_bfd
!= NULL
7863 && location
!= NULL
);
7865 if (chunksz
== sizeof (x
))
7867 BFD_ASSERT (size
== chunksz
);
7869 /* Make sure that we do not perform an undefined shift operation.
7870 We know that size == chunksz so there will only be one iteration
7871 of the loop below. */
7875 shift
= 8 * chunksz
;
7877 for (; size
; size
-= chunksz
, location
+= chunksz
)
7882 x
= (x
<< shift
) | bfd_get_8 (input_bfd
, location
);
7885 x
= (x
<< shift
) | bfd_get_16 (input_bfd
, location
);
7888 x
= (x
<< shift
) | bfd_get_32 (input_bfd
, location
);
7892 x
= (x
<< shift
) | bfd_get_64 (input_bfd
, location
);
7903 decode_complex_addend (unsigned long *start
, /* in bits */
7904 unsigned long *oplen
, /* in bits */
7905 unsigned long *len
, /* in bits */
7906 unsigned long *wordsz
, /* in bytes */
7907 unsigned long *chunksz
, /* in bytes */
7908 unsigned long *lsb0_p
,
7909 unsigned long *signed_p
,
7910 unsigned long *trunc_p
,
7911 unsigned long encoded
)
7913 * start
= encoded
& 0x3F;
7914 * len
= (encoded
>> 6) & 0x3F;
7915 * oplen
= (encoded
>> 12) & 0x3F;
7916 * wordsz
= (encoded
>> 18) & 0xF;
7917 * chunksz
= (encoded
>> 22) & 0xF;
7918 * lsb0_p
= (encoded
>> 27) & 1;
7919 * signed_p
= (encoded
>> 28) & 1;
7920 * trunc_p
= (encoded
>> 29) & 1;
7923 bfd_reloc_status_type
7924 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
7925 asection
*input_section ATTRIBUTE_UNUSED
,
7927 Elf_Internal_Rela
*rel
,
7930 bfd_vma shift
, x
, mask
;
7931 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
7932 bfd_reloc_status_type r
;
7934 /* Perform this reloc, since it is complex.
7935 (this is not to say that it necessarily refers to a complex
7936 symbol; merely that it is a self-describing CGEN based reloc.
7937 i.e. the addend has the complete reloc information (bit start, end,
7938 word size, etc) encoded within it.). */
7940 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
7941 &chunksz
, &lsb0_p
, &signed_p
,
7942 &trunc_p
, rel
->r_addend
);
7944 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
7947 shift
= (start
+ 1) - len
;
7949 shift
= (8 * wordsz
) - (start
+ len
);
7951 /* FIXME: octets_per_byte. */
7952 x
= get_value (wordsz
, chunksz
, input_bfd
, contents
+ rel
->r_offset
);
7955 printf ("Doing complex reloc: "
7956 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
7957 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
7958 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
7959 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
7960 oplen
, (unsigned long) x
, (unsigned long) mask
,
7961 (unsigned long) relocation
);
7966 /* Now do an overflow check. */
7967 r
= bfd_check_overflow ((signed_p
7968 ? complain_overflow_signed
7969 : complain_overflow_unsigned
),
7970 len
, 0, (8 * wordsz
),
7974 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
7977 printf (" relocation: %8.8lx\n"
7978 " shifted mask: %8.8lx\n"
7979 " shifted/masked reloc: %8.8lx\n"
7980 " result: %8.8lx\n",
7981 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
7982 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
7984 /* FIXME: octets_per_byte. */
7985 put_value (wordsz
, chunksz
, input_bfd
, x
, contents
+ rel
->r_offset
);
7989 /* When performing a relocatable link, the input relocations are
7990 preserved. But, if they reference global symbols, the indices
7991 referenced must be updated. Update all the relocations found in
7995 elf_link_adjust_relocs (bfd
*abfd
,
7996 struct bfd_elf_section_reloc_data
*reldata
)
7999 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8001 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8002 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8003 bfd_vma r_type_mask
;
8005 unsigned int count
= reldata
->count
;
8006 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
8008 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
8010 swap_in
= bed
->s
->swap_reloc_in
;
8011 swap_out
= bed
->s
->swap_reloc_out
;
8013 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
8015 swap_in
= bed
->s
->swap_reloca_in
;
8016 swap_out
= bed
->s
->swap_reloca_out
;
8021 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
8024 if (bed
->s
->arch_size
== 32)
8031 r_type_mask
= 0xffffffff;
8035 erela
= reldata
->hdr
->contents
;
8036 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
8038 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
8041 if (*rel_hash
== NULL
)
8044 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
8046 (*swap_in
) (abfd
, erela
, irela
);
8047 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
8048 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
8049 | (irela
[j
].r_info
& r_type_mask
));
8050 (*swap_out
) (abfd
, irela
, erela
);
8054 struct elf_link_sort_rela
8060 enum elf_reloc_type_class type
;
8061 /* We use this as an array of size int_rels_per_ext_rel. */
8062 Elf_Internal_Rela rela
[1];
8066 elf_link_sort_cmp1 (const void *A
, const void *B
)
8068 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8069 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8070 int relativea
, relativeb
;
8072 relativea
= a
->type
== reloc_class_relative
;
8073 relativeb
= b
->type
== reloc_class_relative
;
8075 if (relativea
< relativeb
)
8077 if (relativea
> relativeb
)
8079 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
8081 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
8083 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8085 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8091 elf_link_sort_cmp2 (const void *A
, const void *B
)
8093 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8094 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8096 if (a
->type
< b
->type
)
8098 if (a
->type
> b
->type
)
8100 if (a
->u
.offset
< b
->u
.offset
)
8102 if (a
->u
.offset
> b
->u
.offset
)
8104 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8106 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8112 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
8114 asection
*dynamic_relocs
;
8117 bfd_size_type count
, size
;
8118 size_t i
, ret
, sort_elt
, ext_size
;
8119 bfd_byte
*sort
, *s_non_relative
, *p
;
8120 struct elf_link_sort_rela
*sq
;
8121 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8122 int i2e
= bed
->s
->int_rels_per_ext_rel
;
8123 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8124 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8125 struct bfd_link_order
*lo
;
8127 bfd_boolean use_rela
;
8129 /* Find a dynamic reloc section. */
8130 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
8131 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
8132 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
8133 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8135 bfd_boolean use_rela_initialised
= FALSE
;
8137 /* This is just here to stop gcc from complaining.
8138 It's initialization checking code is not perfect. */
8141 /* Both sections are present. Examine the sizes
8142 of the indirect sections to help us choose. */
8143 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8144 if (lo
->type
== bfd_indirect_link_order
)
8146 asection
*o
= lo
->u
.indirect
.section
;
8148 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8150 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8151 /* Section size is divisible by both rel and rela sizes.
8152 It is of no help to us. */
8156 /* Section size is only divisible by rela. */
8157 if (use_rela_initialised
&& (use_rela
== FALSE
))
8160 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8161 bfd_set_error (bfd_error_invalid_operation
);
8167 use_rela_initialised
= TRUE
;
8171 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8173 /* Section size is only divisible by rel. */
8174 if (use_rela_initialised
&& (use_rela
== TRUE
))
8177 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8178 bfd_set_error (bfd_error_invalid_operation
);
8184 use_rela_initialised
= TRUE
;
8189 /* The section size is not divisible by either - something is wrong. */
8191 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8192 bfd_set_error (bfd_error_invalid_operation
);
8197 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8198 if (lo
->type
== bfd_indirect_link_order
)
8200 asection
*o
= lo
->u
.indirect
.section
;
8202 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8204 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8205 /* Section size is divisible by both rel and rela sizes.
8206 It is of no help to us. */
8210 /* Section size is only divisible by rela. */
8211 if (use_rela_initialised
&& (use_rela
== FALSE
))
8214 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8215 bfd_set_error (bfd_error_invalid_operation
);
8221 use_rela_initialised
= TRUE
;
8225 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8227 /* Section size is only divisible by rel. */
8228 if (use_rela_initialised
&& (use_rela
== TRUE
))
8231 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8232 bfd_set_error (bfd_error_invalid_operation
);
8238 use_rela_initialised
= TRUE
;
8243 /* The section size is not divisible by either - something is wrong. */
8245 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8246 bfd_set_error (bfd_error_invalid_operation
);
8251 if (! use_rela_initialised
)
8255 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
8257 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8264 dynamic_relocs
= rela_dyn
;
8265 ext_size
= bed
->s
->sizeof_rela
;
8266 swap_in
= bed
->s
->swap_reloca_in
;
8267 swap_out
= bed
->s
->swap_reloca_out
;
8271 dynamic_relocs
= rel_dyn
;
8272 ext_size
= bed
->s
->sizeof_rel
;
8273 swap_in
= bed
->s
->swap_reloc_in
;
8274 swap_out
= bed
->s
->swap_reloc_out
;
8278 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8279 if (lo
->type
== bfd_indirect_link_order
)
8280 size
+= lo
->u
.indirect
.section
->size
;
8282 if (size
!= dynamic_relocs
->size
)
8285 sort_elt
= (sizeof (struct elf_link_sort_rela
)
8286 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
8288 count
= dynamic_relocs
->size
/ ext_size
;
8291 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
8295 (*info
->callbacks
->warning
)
8296 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0, 0);
8300 if (bed
->s
->arch_size
== 32)
8301 r_sym_mask
= ~(bfd_vma
) 0xff;
8303 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
8305 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8306 if (lo
->type
== bfd_indirect_link_order
)
8308 bfd_byte
*erel
, *erelend
;
8309 asection
*o
= lo
->u
.indirect
.section
;
8311 if (o
->contents
== NULL
&& o
->size
!= 0)
8313 /* This is a reloc section that is being handled as a normal
8314 section. See bfd_section_from_shdr. We can't combine
8315 relocs in this case. */
8320 erelend
= o
->contents
+ o
->size
;
8321 /* FIXME: octets_per_byte. */
8322 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8324 while (erel
< erelend
)
8326 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8328 (*swap_in
) (abfd
, erel
, s
->rela
);
8329 s
->type
= (*bed
->elf_backend_reloc_type_class
) (info
, o
, s
->rela
);
8330 s
->u
.sym_mask
= r_sym_mask
;
8336 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
8338 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
8340 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8341 if (s
->type
!= reloc_class_relative
)
8347 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
8348 for (; i
< count
; i
++, p
+= sort_elt
)
8350 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
8351 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
8353 sp
->u
.offset
= sq
->rela
->r_offset
;
8356 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
8358 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8359 if (lo
->type
== bfd_indirect_link_order
)
8361 bfd_byte
*erel
, *erelend
;
8362 asection
*o
= lo
->u
.indirect
.section
;
8365 erelend
= o
->contents
+ o
->size
;
8366 /* FIXME: octets_per_byte. */
8367 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8368 while (erel
< erelend
)
8370 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8371 (*swap_out
) (abfd
, s
->rela
, erel
);
8378 *psec
= dynamic_relocs
;
8382 /* Flush the output symbols to the file. */
8385 elf_link_flush_output_syms (struct elf_final_link_info
*flinfo
,
8386 const struct elf_backend_data
*bed
)
8388 if (flinfo
->symbuf_count
> 0)
8390 Elf_Internal_Shdr
*hdr
;
8394 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
8395 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
8396 amt
= flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8397 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) != 0
8398 || bfd_bwrite (flinfo
->symbuf
, amt
, flinfo
->output_bfd
) != amt
)
8401 hdr
->sh_size
+= amt
;
8402 flinfo
->symbuf_count
= 0;
8408 /* Add a symbol to the output symbol table. */
8411 elf_link_output_sym (struct elf_final_link_info
*flinfo
,
8413 Elf_Internal_Sym
*elfsym
,
8414 asection
*input_sec
,
8415 struct elf_link_hash_entry
*h
)
8418 Elf_External_Sym_Shndx
*destshndx
;
8419 int (*output_symbol_hook
)
8420 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
8421 struct elf_link_hash_entry
*);
8422 const struct elf_backend_data
*bed
;
8424 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8425 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
8426 if (output_symbol_hook
!= NULL
)
8428 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
8433 if (name
== NULL
|| *name
== '\0')
8434 elfsym
->st_name
= 0;
8435 else if (input_sec
->flags
& SEC_EXCLUDE
)
8436 elfsym
->st_name
= 0;
8439 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (flinfo
->symstrtab
,
8441 if (elfsym
->st_name
== (unsigned long) -1)
8445 if (flinfo
->symbuf_count
>= flinfo
->symbuf_size
)
8447 if (! elf_link_flush_output_syms (flinfo
, bed
))
8451 dest
= flinfo
->symbuf
+ flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8452 destshndx
= flinfo
->symshndxbuf
;
8453 if (destshndx
!= NULL
)
8455 if (bfd_get_symcount (flinfo
->output_bfd
) >= flinfo
->shndxbuf_size
)
8459 amt
= flinfo
->shndxbuf_size
* sizeof (Elf_External_Sym_Shndx
);
8460 destshndx
= (Elf_External_Sym_Shndx
*) bfd_realloc (destshndx
,
8462 if (destshndx
== NULL
)
8464 flinfo
->symshndxbuf
= destshndx
;
8465 memset ((char *) destshndx
+ amt
, 0, amt
);
8466 flinfo
->shndxbuf_size
*= 2;
8468 destshndx
+= bfd_get_symcount (flinfo
->output_bfd
);
8471 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, elfsym
, dest
, destshndx
);
8472 flinfo
->symbuf_count
+= 1;
8473 bfd_get_symcount (flinfo
->output_bfd
) += 1;
8478 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
8481 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
8483 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
8484 && sym
->st_shndx
< SHN_LORESERVE
)
8486 /* The gABI doesn't support dynamic symbols in output sections
8488 (*_bfd_error_handler
)
8489 (_("%B: Too many sections: %d (>= %d)"),
8490 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
8491 bfd_set_error (bfd_error_nonrepresentable_section
);
8497 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
8498 allowing an unsatisfied unversioned symbol in the DSO to match a
8499 versioned symbol that would normally require an explicit version.
8500 We also handle the case that a DSO references a hidden symbol
8501 which may be satisfied by a versioned symbol in another DSO. */
8504 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
8505 const struct elf_backend_data
*bed
,
8506 struct elf_link_hash_entry
*h
)
8509 struct elf_link_loaded_list
*loaded
;
8511 if (!is_elf_hash_table (info
->hash
))
8514 /* Check indirect symbol. */
8515 while (h
->root
.type
== bfd_link_hash_indirect
)
8516 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8518 switch (h
->root
.type
)
8524 case bfd_link_hash_undefined
:
8525 case bfd_link_hash_undefweak
:
8526 abfd
= h
->root
.u
.undef
.abfd
;
8527 if ((abfd
->flags
& DYNAMIC
) == 0
8528 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
8532 case bfd_link_hash_defined
:
8533 case bfd_link_hash_defweak
:
8534 abfd
= h
->root
.u
.def
.section
->owner
;
8537 case bfd_link_hash_common
:
8538 abfd
= h
->root
.u
.c
.p
->section
->owner
;
8541 BFD_ASSERT (abfd
!= NULL
);
8543 for (loaded
= elf_hash_table (info
)->loaded
;
8545 loaded
= loaded
->next
)
8548 Elf_Internal_Shdr
*hdr
;
8549 bfd_size_type symcount
;
8550 bfd_size_type extsymcount
;
8551 bfd_size_type extsymoff
;
8552 Elf_Internal_Shdr
*versymhdr
;
8553 Elf_Internal_Sym
*isym
;
8554 Elf_Internal_Sym
*isymend
;
8555 Elf_Internal_Sym
*isymbuf
;
8556 Elf_External_Versym
*ever
;
8557 Elf_External_Versym
*extversym
;
8559 input
= loaded
->abfd
;
8561 /* We check each DSO for a possible hidden versioned definition. */
8563 || (input
->flags
& DYNAMIC
) == 0
8564 || elf_dynversym (input
) == 0)
8567 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
8569 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
8570 if (elf_bad_symtab (input
))
8572 extsymcount
= symcount
;
8577 extsymcount
= symcount
- hdr
->sh_info
;
8578 extsymoff
= hdr
->sh_info
;
8581 if (extsymcount
== 0)
8584 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
8586 if (isymbuf
== NULL
)
8589 /* Read in any version definitions. */
8590 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
8591 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
8592 if (extversym
== NULL
)
8595 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
8596 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
8597 != versymhdr
->sh_size
))
8605 ever
= extversym
+ extsymoff
;
8606 isymend
= isymbuf
+ extsymcount
;
8607 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
8610 Elf_Internal_Versym iver
;
8611 unsigned short version_index
;
8613 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
8614 || isym
->st_shndx
== SHN_UNDEF
)
8617 name
= bfd_elf_string_from_elf_section (input
,
8620 if (strcmp (name
, h
->root
.root
.string
) != 0)
8623 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
8625 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
8627 && h
->forced_local
))
8629 /* If we have a non-hidden versioned sym, then it should
8630 have provided a definition for the undefined sym unless
8631 it is defined in a non-shared object and forced local.
8636 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
8637 if (version_index
== 1 || version_index
== 2)
8639 /* This is the base or first version. We can use it. */
8653 /* Add an external symbol to the symbol table. This is called from
8654 the hash table traversal routine. When generating a shared object,
8655 we go through the symbol table twice. The first time we output
8656 anything that might have been forced to local scope in a version
8657 script. The second time we output the symbols that are still
8661 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
8663 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
8664 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
8665 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
8667 Elf_Internal_Sym sym
;
8668 asection
*input_sec
;
8669 const struct elf_backend_data
*bed
;
8673 if (h
->root
.type
== bfd_link_hash_warning
)
8675 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8676 if (h
->root
.type
== bfd_link_hash_new
)
8680 /* Decide whether to output this symbol in this pass. */
8681 if (eoinfo
->localsyms
)
8683 if (!h
->forced_local
)
8685 if (eoinfo
->second_pass
8686 && !((h
->root
.type
== bfd_link_hash_defined
8687 || h
->root
.type
== bfd_link_hash_defweak
)
8688 && h
->root
.u
.def
.section
->output_section
!= NULL
))
8691 if (!eoinfo
->file_sym_done
8692 && (eoinfo
->second_pass
? eoinfo
->flinfo
->filesym_count
== 1
8693 : eoinfo
->flinfo
->filesym_count
> 1))
8695 /* Output a FILE symbol so that following locals are not associated
8696 with the wrong input file. */
8697 memset (&sym
, 0, sizeof (sym
));
8698 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
8699 sym
.st_shndx
= SHN_ABS
;
8700 if (!elf_link_output_sym (eoinfo
->flinfo
, NULL
, &sym
,
8701 bfd_und_section_ptr
, NULL
))
8704 eoinfo
->file_sym_done
= TRUE
;
8709 if (h
->forced_local
)
8713 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8715 if (h
->root
.type
== bfd_link_hash_undefined
)
8717 /* If we have an undefined symbol reference here then it must have
8718 come from a shared library that is being linked in. (Undefined
8719 references in regular files have already been handled unless
8720 they are in unreferenced sections which are removed by garbage
8722 bfd_boolean ignore_undef
= FALSE
;
8724 /* Some symbols may be special in that the fact that they're
8725 undefined can be safely ignored - let backend determine that. */
8726 if (bed
->elf_backend_ignore_undef_symbol
)
8727 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
8729 /* If we are reporting errors for this situation then do so now. */
8732 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
8733 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
8734 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
8736 if (!(flinfo
->info
->callbacks
->undefined_symbol
8737 (flinfo
->info
, h
->root
.root
.string
,
8738 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
,
8740 (flinfo
->info
->unresolved_syms_in_shared_libs
8741 == RM_GENERATE_ERROR
))))
8743 bfd_set_error (bfd_error_bad_value
);
8744 eoinfo
->failed
= TRUE
;
8750 /* We should also warn if a forced local symbol is referenced from
8751 shared libraries. */
8752 if (!flinfo
->info
->relocatable
8753 && flinfo
->info
->executable
8758 && h
->ref_dynamic_nonweak
8759 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
8763 struct elf_link_hash_entry
*hi
= h
;
8765 /* Check indirect symbol. */
8766 while (hi
->root
.type
== bfd_link_hash_indirect
)
8767 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
8769 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
8770 msg
= _("%B: internal symbol `%s' in %B is referenced by DSO");
8771 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
8772 msg
= _("%B: hidden symbol `%s' in %B is referenced by DSO");
8774 msg
= _("%B: local symbol `%s' in %B is referenced by DSO");
8775 def_bfd
= flinfo
->output_bfd
;
8776 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
8777 def_bfd
= hi
->root
.u
.def
.section
->owner
;
8778 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, def_bfd
,
8779 h
->root
.root
.string
);
8780 bfd_set_error (bfd_error_bad_value
);
8781 eoinfo
->failed
= TRUE
;
8785 /* We don't want to output symbols that have never been mentioned by
8786 a regular file, or that we have been told to strip. However, if
8787 h->indx is set to -2, the symbol is used by a reloc and we must
8791 else if ((h
->def_dynamic
8793 || h
->root
.type
== bfd_link_hash_new
)
8797 else if (flinfo
->info
->strip
== strip_all
)
8799 else if (flinfo
->info
->strip
== strip_some
8800 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
8801 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
8803 else if ((h
->root
.type
== bfd_link_hash_defined
8804 || h
->root
.type
== bfd_link_hash_defweak
)
8805 && ((flinfo
->info
->strip_discarded
8806 && discarded_section (h
->root
.u
.def
.section
))
8807 || (h
->root
.u
.def
.section
->owner
!= NULL
8808 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
8810 else if ((h
->root
.type
== bfd_link_hash_undefined
8811 || h
->root
.type
== bfd_link_hash_undefweak
)
8812 && h
->root
.u
.undef
.abfd
!= NULL
8813 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
8818 /* If we're stripping it, and it's not a dynamic symbol, there's
8819 nothing else to do unless it is a forced local symbol or a
8820 STT_GNU_IFUNC symbol. */
8823 && h
->type
!= STT_GNU_IFUNC
8824 && !h
->forced_local
)
8828 sym
.st_size
= h
->size
;
8829 sym
.st_other
= h
->other
;
8830 if (h
->forced_local
)
8832 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
8833 /* Turn off visibility on local symbol. */
8834 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
8836 /* Set STB_GNU_UNIQUE only if symbol is defined in regular object. */
8837 else if (h
->unique_global
&& h
->def_regular
)
8838 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, h
->type
);
8839 else if (h
->root
.type
== bfd_link_hash_undefweak
8840 || h
->root
.type
== bfd_link_hash_defweak
)
8841 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
8843 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
8844 sym
.st_target_internal
= h
->target_internal
;
8846 switch (h
->root
.type
)
8849 case bfd_link_hash_new
:
8850 case bfd_link_hash_warning
:
8854 case bfd_link_hash_undefined
:
8855 case bfd_link_hash_undefweak
:
8856 input_sec
= bfd_und_section_ptr
;
8857 sym
.st_shndx
= SHN_UNDEF
;
8860 case bfd_link_hash_defined
:
8861 case bfd_link_hash_defweak
:
8863 input_sec
= h
->root
.u
.def
.section
;
8864 if (input_sec
->output_section
!= NULL
)
8866 if (eoinfo
->localsyms
&& flinfo
->filesym_count
== 1)
8868 bfd_boolean second_pass_sym
8869 = (input_sec
->owner
== flinfo
->output_bfd
8870 || input_sec
->owner
== NULL
8871 || (input_sec
->flags
& SEC_LINKER_CREATED
) != 0
8872 || (input_sec
->owner
->flags
& BFD_LINKER_CREATED
) != 0);
8874 eoinfo
->need_second_pass
|= second_pass_sym
;
8875 if (eoinfo
->second_pass
!= second_pass_sym
)
8880 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
8881 input_sec
->output_section
);
8882 if (sym
.st_shndx
== SHN_BAD
)
8884 (*_bfd_error_handler
)
8885 (_("%B: could not find output section %A for input section %A"),
8886 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
8887 bfd_set_error (bfd_error_nonrepresentable_section
);
8888 eoinfo
->failed
= TRUE
;
8892 /* ELF symbols in relocatable files are section relative,
8893 but in nonrelocatable files they are virtual
8895 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
8896 if (!flinfo
->info
->relocatable
)
8898 sym
.st_value
+= input_sec
->output_section
->vma
;
8899 if (h
->type
== STT_TLS
)
8901 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
8902 if (tls_sec
!= NULL
)
8903 sym
.st_value
-= tls_sec
->vma
;
8906 /* The TLS section may have been garbage collected. */
8907 BFD_ASSERT (flinfo
->info
->gc_sections
8908 && !input_sec
->gc_mark
);
8915 BFD_ASSERT (input_sec
->owner
== NULL
8916 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
8917 sym
.st_shndx
= SHN_UNDEF
;
8918 input_sec
= bfd_und_section_ptr
;
8923 case bfd_link_hash_common
:
8924 input_sec
= h
->root
.u
.c
.p
->section
;
8925 sym
.st_shndx
= bed
->common_section_index (input_sec
);
8926 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
8929 case bfd_link_hash_indirect
:
8930 /* These symbols are created by symbol versioning. They point
8931 to the decorated version of the name. For example, if the
8932 symbol foo@@GNU_1.2 is the default, which should be used when
8933 foo is used with no version, then we add an indirect symbol
8934 foo which points to foo@@GNU_1.2. We ignore these symbols,
8935 since the indirected symbol is already in the hash table. */
8939 /* Give the processor backend a chance to tweak the symbol value,
8940 and also to finish up anything that needs to be done for this
8941 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
8942 forced local syms when non-shared is due to a historical quirk.
8943 STT_GNU_IFUNC symbol must go through PLT. */
8944 if ((h
->type
== STT_GNU_IFUNC
8946 && !flinfo
->info
->relocatable
)
8947 || ((h
->dynindx
!= -1
8949 && ((flinfo
->info
->shared
8950 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8951 || h
->root
.type
!= bfd_link_hash_undefweak
))
8952 || !h
->forced_local
)
8953 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
8955 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
8956 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
8958 eoinfo
->failed
= TRUE
;
8963 /* If we are marking the symbol as undefined, and there are no
8964 non-weak references to this symbol from a regular object, then
8965 mark the symbol as weak undefined; if there are non-weak
8966 references, mark the symbol as strong. We can't do this earlier,
8967 because it might not be marked as undefined until the
8968 finish_dynamic_symbol routine gets through with it. */
8969 if (sym
.st_shndx
== SHN_UNDEF
8971 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
8972 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
8975 unsigned int type
= ELF_ST_TYPE (sym
.st_info
);
8977 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
8978 if (type
== STT_GNU_IFUNC
)
8981 if (h
->ref_regular_nonweak
)
8982 bindtype
= STB_GLOBAL
;
8984 bindtype
= STB_WEAK
;
8985 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
8988 /* If this is a symbol defined in a dynamic library, don't use the
8989 symbol size from the dynamic library. Relinking an executable
8990 against a new library may introduce gratuitous changes in the
8991 executable's symbols if we keep the size. */
8992 if (sym
.st_shndx
== SHN_UNDEF
8997 /* If a non-weak symbol with non-default visibility is not defined
8998 locally, it is a fatal error. */
8999 if (!flinfo
->info
->relocatable
9000 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
9001 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
9002 && h
->root
.type
== bfd_link_hash_undefined
9007 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
9008 msg
= _("%B: protected symbol `%s' isn't defined");
9009 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
9010 msg
= _("%B: internal symbol `%s' isn't defined");
9012 msg
= _("%B: hidden symbol `%s' isn't defined");
9013 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
9014 bfd_set_error (bfd_error_bad_value
);
9015 eoinfo
->failed
= TRUE
;
9019 /* If this symbol should be put in the .dynsym section, then put it
9020 there now. We already know the symbol index. We also fill in
9021 the entry in the .hash section. */
9022 if (flinfo
->dynsym_sec
!= NULL
9024 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
)
9028 /* Since there is no version information in the dynamic string,
9029 if there is no version info in symbol version section, we will
9030 have a run-time problem. */
9031 if (h
->verinfo
.verdef
== NULL
)
9033 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
9035 if (p
&& p
[1] != '\0')
9037 (*_bfd_error_handler
)
9038 (_("%B: No symbol version section for versioned symbol `%s'"),
9039 flinfo
->output_bfd
, h
->root
.root
.string
);
9040 eoinfo
->failed
= TRUE
;
9045 sym
.st_name
= h
->dynstr_index
;
9046 esym
= flinfo
->dynsym_sec
->contents
+ h
->dynindx
* bed
->s
->sizeof_sym
;
9047 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
9049 eoinfo
->failed
= TRUE
;
9052 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
9054 if (flinfo
->hash_sec
!= NULL
)
9056 size_t hash_entry_size
;
9057 bfd_byte
*bucketpos
;
9062 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
9063 bucket
= h
->u
.elf_hash_value
% bucketcount
;
9066 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
9067 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
9068 + (bucket
+ 2) * hash_entry_size
);
9069 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
9070 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
9072 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
9073 ((bfd_byte
*) flinfo
->hash_sec
->contents
9074 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
9077 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
9079 Elf_Internal_Versym iversym
;
9080 Elf_External_Versym
*eversym
;
9082 if (!h
->def_regular
)
9084 if (h
->verinfo
.verdef
== NULL
)
9085 iversym
.vs_vers
= 0;
9087 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
9091 if (h
->verinfo
.vertree
== NULL
)
9092 iversym
.vs_vers
= 1;
9094 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
9095 if (flinfo
->info
->create_default_symver
)
9100 iversym
.vs_vers
|= VERSYM_HIDDEN
;
9102 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
9103 eversym
+= h
->dynindx
;
9104 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
9108 /* If we're stripping it, then it was just a dynamic symbol, and
9109 there's nothing else to do. */
9110 if (strip
|| (input_sec
->flags
& SEC_EXCLUDE
) != 0)
9113 indx
= bfd_get_symcount (flinfo
->output_bfd
);
9114 ret
= elf_link_output_sym (flinfo
, h
->root
.root
.string
, &sym
, input_sec
, h
);
9117 eoinfo
->failed
= TRUE
;
9122 else if (h
->indx
== -2)
9128 /* Return TRUE if special handling is done for relocs in SEC against
9129 symbols defined in discarded sections. */
9132 elf_section_ignore_discarded_relocs (asection
*sec
)
9134 const struct elf_backend_data
*bed
;
9136 switch (sec
->sec_info_type
)
9138 case SEC_INFO_TYPE_STABS
:
9139 case SEC_INFO_TYPE_EH_FRAME
:
9145 bed
= get_elf_backend_data (sec
->owner
);
9146 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
9147 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
9153 /* Return a mask saying how ld should treat relocations in SEC against
9154 symbols defined in discarded sections. If this function returns
9155 COMPLAIN set, ld will issue a warning message. If this function
9156 returns PRETEND set, and the discarded section was link-once and the
9157 same size as the kept link-once section, ld will pretend that the
9158 symbol was actually defined in the kept section. Otherwise ld will
9159 zero the reloc (at least that is the intent, but some cooperation by
9160 the target dependent code is needed, particularly for REL targets). */
9163 _bfd_elf_default_action_discarded (asection
*sec
)
9165 if (sec
->flags
& SEC_DEBUGGING
)
9168 if (strcmp (".eh_frame", sec
->name
) == 0)
9171 if (strcmp (".gcc_except_table", sec
->name
) == 0)
9174 return COMPLAIN
| PRETEND
;
9177 /* Find a match between a section and a member of a section group. */
9180 match_group_member (asection
*sec
, asection
*group
,
9181 struct bfd_link_info
*info
)
9183 asection
*first
= elf_next_in_group (group
);
9184 asection
*s
= first
;
9188 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
9191 s
= elf_next_in_group (s
);
9199 /* Check if the kept section of a discarded section SEC can be used
9200 to replace it. Return the replacement if it is OK. Otherwise return
9204 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
9208 kept
= sec
->kept_section
;
9211 if ((kept
->flags
& SEC_GROUP
) != 0)
9212 kept
= match_group_member (sec
, kept
, info
);
9214 && ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
9215 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
)))
9217 sec
->kept_section
= kept
;
9222 /* Link an input file into the linker output file. This function
9223 handles all the sections and relocations of the input file at once.
9224 This is so that we only have to read the local symbols once, and
9225 don't have to keep them in memory. */
9228 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
9230 int (*relocate_section
)
9231 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
9232 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
9234 Elf_Internal_Shdr
*symtab_hdr
;
9237 Elf_Internal_Sym
*isymbuf
;
9238 Elf_Internal_Sym
*isym
;
9239 Elf_Internal_Sym
*isymend
;
9241 asection
**ppsection
;
9243 const struct elf_backend_data
*bed
;
9244 struct elf_link_hash_entry
**sym_hashes
;
9245 bfd_size_type address_size
;
9246 bfd_vma r_type_mask
;
9248 bfd_boolean have_file_sym
= FALSE
;
9250 output_bfd
= flinfo
->output_bfd
;
9251 bed
= get_elf_backend_data (output_bfd
);
9252 relocate_section
= bed
->elf_backend_relocate_section
;
9254 /* If this is a dynamic object, we don't want to do anything here:
9255 we don't want the local symbols, and we don't want the section
9257 if ((input_bfd
->flags
& DYNAMIC
) != 0)
9260 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
9261 if (elf_bad_symtab (input_bfd
))
9263 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9268 locsymcount
= symtab_hdr
->sh_info
;
9269 extsymoff
= symtab_hdr
->sh_info
;
9272 /* Read the local symbols. */
9273 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
9274 if (isymbuf
== NULL
&& locsymcount
!= 0)
9276 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
9277 flinfo
->internal_syms
,
9278 flinfo
->external_syms
,
9279 flinfo
->locsym_shndx
);
9280 if (isymbuf
== NULL
)
9284 /* Find local symbol sections and adjust values of symbols in
9285 SEC_MERGE sections. Write out those local symbols we know are
9286 going into the output file. */
9287 isymend
= isymbuf
+ locsymcount
;
9288 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
9290 isym
++, pindex
++, ppsection
++)
9294 Elf_Internal_Sym osym
;
9300 if (elf_bad_symtab (input_bfd
))
9302 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
9309 if (isym
->st_shndx
== SHN_UNDEF
)
9310 isec
= bfd_und_section_ptr
;
9311 else if (isym
->st_shndx
== SHN_ABS
)
9312 isec
= bfd_abs_section_ptr
;
9313 else if (isym
->st_shndx
== SHN_COMMON
)
9314 isec
= bfd_com_section_ptr
;
9317 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
9320 /* Don't attempt to output symbols with st_shnx in the
9321 reserved range other than SHN_ABS and SHN_COMMON. */
9325 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
9326 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
9328 _bfd_merged_section_offset (output_bfd
, &isec
,
9329 elf_section_data (isec
)->sec_info
,
9335 /* Don't output the first, undefined, symbol. */
9336 if (ppsection
== flinfo
->sections
)
9339 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
9341 /* We never output section symbols. Instead, we use the
9342 section symbol of the corresponding section in the output
9347 /* If we are stripping all symbols, we don't want to output this
9349 if (flinfo
->info
->strip
== strip_all
)
9352 /* If we are discarding all local symbols, we don't want to
9353 output this one. If we are generating a relocatable output
9354 file, then some of the local symbols may be required by
9355 relocs; we output them below as we discover that they are
9357 if (flinfo
->info
->discard
== discard_all
)
9360 /* If this symbol is defined in a section which we are
9361 discarding, we don't need to keep it. */
9362 if (isym
->st_shndx
!= SHN_UNDEF
9363 && isym
->st_shndx
< SHN_LORESERVE
9364 && bfd_section_removed_from_list (output_bfd
,
9365 isec
->output_section
))
9368 /* Get the name of the symbol. */
9369 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
9374 /* See if we are discarding symbols with this name. */
9375 if ((flinfo
->info
->strip
== strip_some
9376 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
9378 || (((flinfo
->info
->discard
== discard_sec_merge
9379 && (isec
->flags
& SEC_MERGE
) && !flinfo
->info
->relocatable
)
9380 || flinfo
->info
->discard
== discard_l
)
9381 && bfd_is_local_label_name (input_bfd
, name
)))
9384 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
9386 have_file_sym
= TRUE
;
9387 flinfo
->filesym_count
+= 1;
9391 /* In the absence of debug info, bfd_find_nearest_line uses
9392 FILE symbols to determine the source file for local
9393 function symbols. Provide a FILE symbol here if input
9394 files lack such, so that their symbols won't be
9395 associated with a previous input file. It's not the
9396 source file, but the best we can do. */
9397 have_file_sym
= TRUE
;
9398 flinfo
->filesym_count
+= 1;
9399 memset (&osym
, 0, sizeof (osym
));
9400 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
9401 osym
.st_shndx
= SHN_ABS
;
9402 if (!elf_link_output_sym (flinfo
, input_bfd
->filename
, &osym
,
9403 bfd_abs_section_ptr
, NULL
))
9409 /* Adjust the section index for the output file. */
9410 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9411 isec
->output_section
);
9412 if (osym
.st_shndx
== SHN_BAD
)
9415 /* ELF symbols in relocatable files are section relative, but
9416 in executable files they are virtual addresses. Note that
9417 this code assumes that all ELF sections have an associated
9418 BFD section with a reasonable value for output_offset; below
9419 we assume that they also have a reasonable value for
9420 output_section. Any special sections must be set up to meet
9421 these requirements. */
9422 osym
.st_value
+= isec
->output_offset
;
9423 if (!flinfo
->info
->relocatable
)
9425 osym
.st_value
+= isec
->output_section
->vma
;
9426 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
9428 /* STT_TLS symbols are relative to PT_TLS segment base. */
9429 BFD_ASSERT (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
);
9430 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
9434 indx
= bfd_get_symcount (output_bfd
);
9435 ret
= elf_link_output_sym (flinfo
, name
, &osym
, isec
, NULL
);
9442 if (bed
->s
->arch_size
== 32)
9450 r_type_mask
= 0xffffffff;
9455 /* Relocate the contents of each section. */
9456 sym_hashes
= elf_sym_hashes (input_bfd
);
9457 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
9461 if (! o
->linker_mark
)
9463 /* This section was omitted from the link. */
9467 if (flinfo
->info
->relocatable
9468 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
9470 /* Deal with the group signature symbol. */
9471 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
9472 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
9473 asection
*osec
= o
->output_section
;
9475 if (symndx
>= locsymcount
9476 || (elf_bad_symtab (input_bfd
)
9477 && flinfo
->sections
[symndx
] == NULL
))
9479 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
9480 while (h
->root
.type
== bfd_link_hash_indirect
9481 || h
->root
.type
== bfd_link_hash_warning
)
9482 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9483 /* Arrange for symbol to be output. */
9485 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
9487 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
9489 /* We'll use the output section target_index. */
9490 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9491 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
9495 if (flinfo
->indices
[symndx
] == -1)
9497 /* Otherwise output the local symbol now. */
9498 Elf_Internal_Sym sym
= isymbuf
[symndx
];
9499 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9504 name
= bfd_elf_string_from_elf_section (input_bfd
,
9505 symtab_hdr
->sh_link
,
9510 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9512 if (sym
.st_shndx
== SHN_BAD
)
9515 sym
.st_value
+= o
->output_offset
;
9517 indx
= bfd_get_symcount (output_bfd
);
9518 ret
= elf_link_output_sym (flinfo
, name
, &sym
, o
, NULL
);
9522 flinfo
->indices
[symndx
] = indx
;
9526 elf_section_data (osec
)->this_hdr
.sh_info
9527 = flinfo
->indices
[symndx
];
9531 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
9532 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
9535 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
9537 /* Section was created by _bfd_elf_link_create_dynamic_sections
9542 /* Get the contents of the section. They have been cached by a
9543 relaxation routine. Note that o is a section in an input
9544 file, so the contents field will not have been set by any of
9545 the routines which work on output files. */
9546 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
9547 contents
= elf_section_data (o
)->this_hdr
.contents
;
9550 contents
= flinfo
->contents
;
9551 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
9555 if ((o
->flags
& SEC_RELOC
) != 0)
9557 Elf_Internal_Rela
*internal_relocs
;
9558 Elf_Internal_Rela
*rel
, *relend
;
9559 int action_discarded
;
9562 /* Get the swapped relocs. */
9564 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
9565 flinfo
->internal_relocs
, FALSE
);
9566 if (internal_relocs
== NULL
9567 && o
->reloc_count
> 0)
9570 /* We need to reverse-copy input .ctors/.dtors sections if
9571 they are placed in .init_array/.finit_array for output. */
9572 if (o
->size
> address_size
9573 && ((strncmp (o
->name
, ".ctors", 6) == 0
9574 && strcmp (o
->output_section
->name
,
9575 ".init_array") == 0)
9576 || (strncmp (o
->name
, ".dtors", 6) == 0
9577 && strcmp (o
->output_section
->name
,
9578 ".fini_array") == 0))
9579 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
9581 if (o
->size
!= o
->reloc_count
* address_size
)
9583 (*_bfd_error_handler
)
9584 (_("error: %B: size of section %A is not "
9585 "multiple of address size"),
9587 bfd_set_error (bfd_error_on_input
);
9590 o
->flags
|= SEC_ELF_REVERSE_COPY
;
9593 action_discarded
= -1;
9594 if (!elf_section_ignore_discarded_relocs (o
))
9595 action_discarded
= (*bed
->action_discarded
) (o
);
9597 /* Run through the relocs evaluating complex reloc symbols and
9598 looking for relocs against symbols from discarded sections
9599 or section symbols from removed link-once sections.
9600 Complain about relocs against discarded sections. Zero
9601 relocs against removed link-once sections. */
9603 rel
= internal_relocs
;
9604 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9605 for ( ; rel
< relend
; rel
++)
9607 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
9608 unsigned int s_type
;
9609 asection
**ps
, *sec
;
9610 struct elf_link_hash_entry
*h
= NULL
;
9611 const char *sym_name
;
9613 if (r_symndx
== STN_UNDEF
)
9616 if (r_symndx
>= locsymcount
9617 || (elf_bad_symtab (input_bfd
)
9618 && flinfo
->sections
[r_symndx
] == NULL
))
9620 h
= sym_hashes
[r_symndx
- extsymoff
];
9622 /* Badly formatted input files can contain relocs that
9623 reference non-existant symbols. Check here so that
9624 we do not seg fault. */
9629 sprintf_vma (buffer
, rel
->r_info
);
9630 (*_bfd_error_handler
)
9631 (_("error: %B contains a reloc (0x%s) for section %A "
9632 "that references a non-existent global symbol"),
9633 input_bfd
, o
, buffer
);
9634 bfd_set_error (bfd_error_bad_value
);
9638 while (h
->root
.type
== bfd_link_hash_indirect
9639 || h
->root
.type
== bfd_link_hash_warning
)
9640 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9645 if (h
->root
.type
== bfd_link_hash_defined
9646 || h
->root
.type
== bfd_link_hash_defweak
)
9647 ps
= &h
->root
.u
.def
.section
;
9649 sym_name
= h
->root
.root
.string
;
9653 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
9655 s_type
= ELF_ST_TYPE (sym
->st_info
);
9656 ps
= &flinfo
->sections
[r_symndx
];
9657 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
9661 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
9662 && !flinfo
->info
->relocatable
)
9665 bfd_vma dot
= (rel
->r_offset
9666 + o
->output_offset
+ o
->output_section
->vma
);
9668 printf ("Encountered a complex symbol!");
9669 printf (" (input_bfd %s, section %s, reloc %ld\n",
9670 input_bfd
->filename
, o
->name
,
9671 (long) (rel
- internal_relocs
));
9672 printf (" symbol: idx %8.8lx, name %s\n",
9673 r_symndx
, sym_name
);
9674 printf (" reloc : info %8.8lx, addr %8.8lx\n",
9675 (unsigned long) rel
->r_info
,
9676 (unsigned long) rel
->r_offset
);
9678 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
9679 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
9682 /* Symbol evaluated OK. Update to absolute value. */
9683 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
9688 if (action_discarded
!= -1 && ps
!= NULL
)
9690 /* Complain if the definition comes from a
9691 discarded section. */
9692 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
9694 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
9695 if (action_discarded
& COMPLAIN
)
9696 (*flinfo
->info
->callbacks
->einfo
)
9697 (_("%X`%s' referenced in section `%A' of %B: "
9698 "defined in discarded section `%A' of %B\n"),
9699 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
9701 /* Try to do the best we can to support buggy old
9702 versions of gcc. Pretend that the symbol is
9703 really defined in the kept linkonce section.
9704 FIXME: This is quite broken. Modifying the
9705 symbol here means we will be changing all later
9706 uses of the symbol, not just in this section. */
9707 if (action_discarded
& PRETEND
)
9711 kept
= _bfd_elf_check_kept_section (sec
,
9723 /* Relocate the section by invoking a back end routine.
9725 The back end routine is responsible for adjusting the
9726 section contents as necessary, and (if using Rela relocs
9727 and generating a relocatable output file) adjusting the
9728 reloc addend as necessary.
9730 The back end routine does not have to worry about setting
9731 the reloc address or the reloc symbol index.
9733 The back end routine is given a pointer to the swapped in
9734 internal symbols, and can access the hash table entries
9735 for the external symbols via elf_sym_hashes (input_bfd).
9737 When generating relocatable output, the back end routine
9738 must handle STB_LOCAL/STT_SECTION symbols specially. The
9739 output symbol is going to be a section symbol
9740 corresponding to the output section, which will require
9741 the addend to be adjusted. */
9743 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
9744 input_bfd
, o
, contents
,
9752 || flinfo
->info
->relocatable
9753 || flinfo
->info
->emitrelocations
)
9755 Elf_Internal_Rela
*irela
;
9756 Elf_Internal_Rela
*irelaend
, *irelamid
;
9757 bfd_vma last_offset
;
9758 struct elf_link_hash_entry
**rel_hash
;
9759 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
9760 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
9761 unsigned int next_erel
;
9762 bfd_boolean rela_normal
;
9763 struct bfd_elf_section_data
*esdi
, *esdo
;
9765 esdi
= elf_section_data (o
);
9766 esdo
= elf_section_data (o
->output_section
);
9767 rela_normal
= FALSE
;
9769 /* Adjust the reloc addresses and symbol indices. */
9771 irela
= internal_relocs
;
9772 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9773 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
9774 /* We start processing the REL relocs, if any. When we reach
9775 IRELAMID in the loop, we switch to the RELA relocs. */
9777 if (esdi
->rel
.hdr
!= NULL
)
9778 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
9779 * bed
->s
->int_rels_per_ext_rel
);
9780 rel_hash_list
= rel_hash
;
9781 rela_hash_list
= NULL
;
9782 last_offset
= o
->output_offset
;
9783 if (!flinfo
->info
->relocatable
)
9784 last_offset
+= o
->output_section
->vma
;
9785 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
9787 unsigned long r_symndx
;
9789 Elf_Internal_Sym sym
;
9791 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
9797 if (irela
== irelamid
)
9799 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
9800 rela_hash_list
= rel_hash
;
9801 rela_normal
= bed
->rela_normal
;
9804 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
9807 if (irela
->r_offset
>= (bfd_vma
) -2)
9809 /* This is a reloc for a deleted entry or somesuch.
9810 Turn it into an R_*_NONE reloc, at the same
9811 offset as the last reloc. elf_eh_frame.c and
9812 bfd_elf_discard_info rely on reloc offsets
9814 irela
->r_offset
= last_offset
;
9816 irela
->r_addend
= 0;
9820 irela
->r_offset
+= o
->output_offset
;
9822 /* Relocs in an executable have to be virtual addresses. */
9823 if (!flinfo
->info
->relocatable
)
9824 irela
->r_offset
+= o
->output_section
->vma
;
9826 last_offset
= irela
->r_offset
;
9828 r_symndx
= irela
->r_info
>> r_sym_shift
;
9829 if (r_symndx
== STN_UNDEF
)
9832 if (r_symndx
>= locsymcount
9833 || (elf_bad_symtab (input_bfd
)
9834 && flinfo
->sections
[r_symndx
] == NULL
))
9836 struct elf_link_hash_entry
*rh
;
9839 /* This is a reloc against a global symbol. We
9840 have not yet output all the local symbols, so
9841 we do not know the symbol index of any global
9842 symbol. We set the rel_hash entry for this
9843 reloc to point to the global hash table entry
9844 for this symbol. The symbol index is then
9845 set at the end of bfd_elf_final_link. */
9846 indx
= r_symndx
- extsymoff
;
9847 rh
= elf_sym_hashes (input_bfd
)[indx
];
9848 while (rh
->root
.type
== bfd_link_hash_indirect
9849 || rh
->root
.type
== bfd_link_hash_warning
)
9850 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
9852 /* Setting the index to -2 tells
9853 elf_link_output_extsym that this symbol is
9855 BFD_ASSERT (rh
->indx
< 0);
9863 /* This is a reloc against a local symbol. */
9866 sym
= isymbuf
[r_symndx
];
9867 sec
= flinfo
->sections
[r_symndx
];
9868 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
9870 /* I suppose the backend ought to fill in the
9871 section of any STT_SECTION symbol against a
9872 processor specific section. */
9873 r_symndx
= STN_UNDEF
;
9874 if (bfd_is_abs_section (sec
))
9876 else if (sec
== NULL
|| sec
->owner
== NULL
)
9878 bfd_set_error (bfd_error_bad_value
);
9883 asection
*osec
= sec
->output_section
;
9885 /* If we have discarded a section, the output
9886 section will be the absolute section. In
9887 case of discarded SEC_MERGE sections, use
9888 the kept section. relocate_section should
9889 have already handled discarded linkonce
9891 if (bfd_is_abs_section (osec
)
9892 && sec
->kept_section
!= NULL
9893 && sec
->kept_section
->output_section
!= NULL
)
9895 osec
= sec
->kept_section
->output_section
;
9896 irela
->r_addend
-= osec
->vma
;
9899 if (!bfd_is_abs_section (osec
))
9901 r_symndx
= osec
->target_index
;
9902 if (r_symndx
== STN_UNDEF
)
9904 irela
->r_addend
+= osec
->vma
;
9905 osec
= _bfd_nearby_section (output_bfd
, osec
,
9907 irela
->r_addend
-= osec
->vma
;
9908 r_symndx
= osec
->target_index
;
9913 /* Adjust the addend according to where the
9914 section winds up in the output section. */
9916 irela
->r_addend
+= sec
->output_offset
;
9920 if (flinfo
->indices
[r_symndx
] == -1)
9922 unsigned long shlink
;
9927 if (flinfo
->info
->strip
== strip_all
)
9929 /* You can't do ld -r -s. */
9930 bfd_set_error (bfd_error_invalid_operation
);
9934 /* This symbol was skipped earlier, but
9935 since it is needed by a reloc, we
9936 must output it now. */
9937 shlink
= symtab_hdr
->sh_link
;
9938 name
= (bfd_elf_string_from_elf_section
9939 (input_bfd
, shlink
, sym
.st_name
));
9943 osec
= sec
->output_section
;
9945 _bfd_elf_section_from_bfd_section (output_bfd
,
9947 if (sym
.st_shndx
== SHN_BAD
)
9950 sym
.st_value
+= sec
->output_offset
;
9951 if (!flinfo
->info
->relocatable
)
9953 sym
.st_value
+= osec
->vma
;
9954 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
9956 /* STT_TLS symbols are relative to PT_TLS
9958 BFD_ASSERT (elf_hash_table (flinfo
->info
)
9960 sym
.st_value
-= (elf_hash_table (flinfo
->info
)
9965 indx
= bfd_get_symcount (output_bfd
);
9966 ret
= elf_link_output_sym (flinfo
, name
, &sym
, sec
,
9971 flinfo
->indices
[r_symndx
] = indx
;
9976 r_symndx
= flinfo
->indices
[r_symndx
];
9979 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
9980 | (irela
->r_info
& r_type_mask
));
9983 /* Swap out the relocs. */
9984 input_rel_hdr
= esdi
->rel
.hdr
;
9985 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
9987 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
9992 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
9993 * bed
->s
->int_rels_per_ext_rel
);
9994 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
9997 input_rela_hdr
= esdi
->rela
.hdr
;
9998 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
10000 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
10009 /* Write out the modified section contents. */
10010 if (bed
->elf_backend_write_section
10011 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
10014 /* Section written out. */
10016 else switch (o
->sec_info_type
)
10018 case SEC_INFO_TYPE_STABS
:
10019 if (! (_bfd_write_section_stabs
10021 &elf_hash_table (flinfo
->info
)->stab_info
,
10022 o
, &elf_section_data (o
)->sec_info
, contents
)))
10025 case SEC_INFO_TYPE_MERGE
:
10026 if (! _bfd_write_merged_section (output_bfd
, o
,
10027 elf_section_data (o
)->sec_info
))
10030 case SEC_INFO_TYPE_EH_FRAME
:
10032 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
10039 /* FIXME: octets_per_byte. */
10040 if (! (o
->flags
& SEC_EXCLUDE
))
10042 file_ptr offset
= (file_ptr
) o
->output_offset
;
10043 bfd_size_type todo
= o
->size
;
10044 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
10046 /* Reverse-copy input section to output. */
10049 todo
-= address_size
;
10050 if (! bfd_set_section_contents (output_bfd
,
10058 offset
+= address_size
;
10062 else if (! bfd_set_section_contents (output_bfd
,
10076 /* Generate a reloc when linking an ELF file. This is a reloc
10077 requested by the linker, and does not come from any input file. This
10078 is used to build constructor and destructor tables when linking
10082 elf_reloc_link_order (bfd
*output_bfd
,
10083 struct bfd_link_info
*info
,
10084 asection
*output_section
,
10085 struct bfd_link_order
*link_order
)
10087 reloc_howto_type
*howto
;
10091 struct bfd_elf_section_reloc_data
*reldata
;
10092 struct elf_link_hash_entry
**rel_hash_ptr
;
10093 Elf_Internal_Shdr
*rel_hdr
;
10094 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
10095 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
10098 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
10100 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
10103 bfd_set_error (bfd_error_bad_value
);
10107 addend
= link_order
->u
.reloc
.p
->addend
;
10110 reldata
= &esdo
->rel
;
10111 else if (esdo
->rela
.hdr
)
10112 reldata
= &esdo
->rela
;
10119 /* Figure out the symbol index. */
10120 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
10121 if (link_order
->type
== bfd_section_reloc_link_order
)
10123 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
10124 BFD_ASSERT (indx
!= 0);
10125 *rel_hash_ptr
= NULL
;
10129 struct elf_link_hash_entry
*h
;
10131 /* Treat a reloc against a defined symbol as though it were
10132 actually against the section. */
10133 h
= ((struct elf_link_hash_entry
*)
10134 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
10135 link_order
->u
.reloc
.p
->u
.name
,
10136 FALSE
, FALSE
, TRUE
));
10138 && (h
->root
.type
== bfd_link_hash_defined
10139 || h
->root
.type
== bfd_link_hash_defweak
))
10143 section
= h
->root
.u
.def
.section
;
10144 indx
= section
->output_section
->target_index
;
10145 *rel_hash_ptr
= NULL
;
10146 /* It seems that we ought to add the symbol value to the
10147 addend here, but in practice it has already been added
10148 because it was passed to constructor_callback. */
10149 addend
+= section
->output_section
->vma
+ section
->output_offset
;
10151 else if (h
!= NULL
)
10153 /* Setting the index to -2 tells elf_link_output_extsym that
10154 this symbol is used by a reloc. */
10161 if (! ((*info
->callbacks
->unattached_reloc
)
10162 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0)))
10168 /* If this is an inplace reloc, we must write the addend into the
10170 if (howto
->partial_inplace
&& addend
!= 0)
10172 bfd_size_type size
;
10173 bfd_reloc_status_type rstat
;
10176 const char *sym_name
;
10178 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
10179 buf
= (bfd_byte
*) bfd_zmalloc (size
);
10182 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
10189 case bfd_reloc_outofrange
:
10192 case bfd_reloc_overflow
:
10193 if (link_order
->type
== bfd_section_reloc_link_order
)
10194 sym_name
= bfd_section_name (output_bfd
,
10195 link_order
->u
.reloc
.p
->u
.section
);
10197 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
10198 if (! ((*info
->callbacks
->reloc_overflow
)
10199 (info
, NULL
, sym_name
, howto
->name
, addend
, NULL
,
10200 NULL
, (bfd_vma
) 0)))
10207 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
10208 link_order
->offset
, size
);
10214 /* The address of a reloc is relative to the section in a
10215 relocatable file, and is a virtual address in an executable
10217 offset
= link_order
->offset
;
10218 if (! info
->relocatable
)
10219 offset
+= output_section
->vma
;
10221 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
10223 irel
[i
].r_offset
= offset
;
10224 irel
[i
].r_info
= 0;
10225 irel
[i
].r_addend
= 0;
10227 if (bed
->s
->arch_size
== 32)
10228 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
10230 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
10232 rel_hdr
= reldata
->hdr
;
10233 erel
= rel_hdr
->contents
;
10234 if (rel_hdr
->sh_type
== SHT_REL
)
10236 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
10237 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
10241 irel
[0].r_addend
= addend
;
10242 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
10243 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
10252 /* Get the output vma of the section pointed to by the sh_link field. */
10255 elf_get_linked_section_vma (struct bfd_link_order
*p
)
10257 Elf_Internal_Shdr
**elf_shdrp
;
10261 s
= p
->u
.indirect
.section
;
10262 elf_shdrp
= elf_elfsections (s
->owner
);
10263 elfsec
= _bfd_elf_section_from_bfd_section (s
->owner
, s
);
10264 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
10266 The Intel C compiler generates SHT_IA_64_UNWIND with
10267 SHF_LINK_ORDER. But it doesn't set the sh_link or
10268 sh_info fields. Hence we could get the situation
10269 where elfsec is 0. */
10272 const struct elf_backend_data
*bed
10273 = get_elf_backend_data (s
->owner
);
10274 if (bed
->link_order_error_handler
)
10275 bed
->link_order_error_handler
10276 (_("%B: warning: sh_link not set for section `%A'"), s
->owner
, s
);
10281 s
= elf_shdrp
[elfsec
]->bfd_section
;
10282 return s
->output_section
->vma
+ s
->output_offset
;
10287 /* Compare two sections based on the locations of the sections they are
10288 linked to. Used by elf_fixup_link_order. */
10291 compare_link_order (const void * a
, const void * b
)
10296 apos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)a
);
10297 bpos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)b
);
10300 return apos
> bpos
;
10304 /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
10305 order as their linked sections. Returns false if this could not be done
10306 because an output section includes both ordered and unordered
10307 sections. Ideally we'd do this in the linker proper. */
10310 elf_fixup_link_order (bfd
*abfd
, asection
*o
)
10312 int seen_linkorder
;
10315 struct bfd_link_order
*p
;
10317 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10319 struct bfd_link_order
**sections
;
10320 asection
*s
, *other_sec
, *linkorder_sec
;
10324 linkorder_sec
= NULL
;
10326 seen_linkorder
= 0;
10327 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10329 if (p
->type
== bfd_indirect_link_order
)
10331 s
= p
->u
.indirect
.section
;
10333 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10334 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
10335 && (elfsec
= _bfd_elf_section_from_bfd_section (sub
, s
))
10336 && elfsec
< elf_numsections (sub
)
10337 && elf_elfsections (sub
)[elfsec
]->sh_flags
& SHF_LINK_ORDER
10338 && elf_elfsections (sub
)[elfsec
]->sh_link
< elf_numsections (sub
))
10352 if (seen_other
&& seen_linkorder
)
10354 if (other_sec
&& linkorder_sec
)
10355 (*_bfd_error_handler
) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"),
10357 linkorder_sec
->owner
, other_sec
,
10360 (*_bfd_error_handler
) (_("%A has both ordered and unordered sections"),
10362 bfd_set_error (bfd_error_bad_value
);
10367 if (!seen_linkorder
)
10370 sections
= (struct bfd_link_order
**)
10371 bfd_malloc (seen_linkorder
* sizeof (struct bfd_link_order
*));
10372 if (sections
== NULL
)
10374 seen_linkorder
= 0;
10376 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10378 sections
[seen_linkorder
++] = p
;
10380 /* Sort the input sections in the order of their linked section. */
10381 qsort (sections
, seen_linkorder
, sizeof (struct bfd_link_order
*),
10382 compare_link_order
);
10384 /* Change the offsets of the sections. */
10386 for (n
= 0; n
< seen_linkorder
; n
++)
10388 s
= sections
[n
]->u
.indirect
.section
;
10389 offset
&= ~(bfd_vma
) 0 << s
->alignment_power
;
10390 s
->output_offset
= offset
;
10391 sections
[n
]->offset
= offset
;
10392 /* FIXME: octets_per_byte. */
10393 offset
+= sections
[n
]->size
;
10401 elf_final_link_free (bfd
*obfd
, struct elf_final_link_info
*flinfo
)
10405 if (flinfo
->symstrtab
!= NULL
)
10406 _bfd_stringtab_free (flinfo
->symstrtab
);
10407 if (flinfo
->contents
!= NULL
)
10408 free (flinfo
->contents
);
10409 if (flinfo
->external_relocs
!= NULL
)
10410 free (flinfo
->external_relocs
);
10411 if (flinfo
->internal_relocs
!= NULL
)
10412 free (flinfo
->internal_relocs
);
10413 if (flinfo
->external_syms
!= NULL
)
10414 free (flinfo
->external_syms
);
10415 if (flinfo
->locsym_shndx
!= NULL
)
10416 free (flinfo
->locsym_shndx
);
10417 if (flinfo
->internal_syms
!= NULL
)
10418 free (flinfo
->internal_syms
);
10419 if (flinfo
->indices
!= NULL
)
10420 free (flinfo
->indices
);
10421 if (flinfo
->sections
!= NULL
)
10422 free (flinfo
->sections
);
10423 if (flinfo
->symbuf
!= NULL
)
10424 free (flinfo
->symbuf
);
10425 if (flinfo
->symshndxbuf
!= NULL
)
10426 free (flinfo
->symshndxbuf
);
10427 for (o
= obfd
->sections
; o
!= NULL
; o
= o
->next
)
10429 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10430 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
10431 free (esdo
->rel
.hashes
);
10432 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
10433 free (esdo
->rela
.hashes
);
10437 /* Do the final step of an ELF link. */
10440 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
10442 bfd_boolean dynamic
;
10443 bfd_boolean emit_relocs
;
10445 struct elf_final_link_info flinfo
;
10447 struct bfd_link_order
*p
;
10449 bfd_size_type max_contents_size
;
10450 bfd_size_type max_external_reloc_size
;
10451 bfd_size_type max_internal_reloc_count
;
10452 bfd_size_type max_sym_count
;
10453 bfd_size_type max_sym_shndx_count
;
10455 Elf_Internal_Sym elfsym
;
10457 Elf_Internal_Shdr
*symtab_hdr
;
10458 Elf_Internal_Shdr
*symtab_shndx_hdr
;
10459 Elf_Internal_Shdr
*symstrtab_hdr
;
10460 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10461 struct elf_outext_info eoinfo
;
10462 bfd_boolean merged
;
10463 size_t relativecount
= 0;
10464 asection
*reldyn
= 0;
10466 asection
*attr_section
= NULL
;
10467 bfd_vma attr_size
= 0;
10468 const char *std_attrs_section
;
10470 if (! is_elf_hash_table (info
->hash
))
10474 abfd
->flags
|= DYNAMIC
;
10476 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
10477 dynobj
= elf_hash_table (info
)->dynobj
;
10479 emit_relocs
= (info
->relocatable
10480 || info
->emitrelocations
);
10482 flinfo
.info
= info
;
10483 flinfo
.output_bfd
= abfd
;
10484 flinfo
.symstrtab
= _bfd_elf_stringtab_init ();
10485 if (flinfo
.symstrtab
== NULL
)
10490 flinfo
.dynsym_sec
= NULL
;
10491 flinfo
.hash_sec
= NULL
;
10492 flinfo
.symver_sec
= NULL
;
10496 flinfo
.dynsym_sec
= bfd_get_linker_section (dynobj
, ".dynsym");
10497 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
10498 /* Note that dynsym_sec can be NULL (on VMS). */
10499 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
10500 /* Note that it is OK if symver_sec is NULL. */
10503 flinfo
.contents
= NULL
;
10504 flinfo
.external_relocs
= NULL
;
10505 flinfo
.internal_relocs
= NULL
;
10506 flinfo
.external_syms
= NULL
;
10507 flinfo
.locsym_shndx
= NULL
;
10508 flinfo
.internal_syms
= NULL
;
10509 flinfo
.indices
= NULL
;
10510 flinfo
.sections
= NULL
;
10511 flinfo
.symbuf
= NULL
;
10512 flinfo
.symshndxbuf
= NULL
;
10513 flinfo
.symbuf_count
= 0;
10514 flinfo
.shndxbuf_size
= 0;
10515 flinfo
.filesym_count
= 0;
10517 /* The object attributes have been merged. Remove the input
10518 sections from the link, and set the contents of the output
10520 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
10521 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10523 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
10524 || strcmp (o
->name
, ".gnu.attributes") == 0)
10526 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10528 asection
*input_section
;
10530 if (p
->type
!= bfd_indirect_link_order
)
10532 input_section
= p
->u
.indirect
.section
;
10533 /* Hack: reset the SEC_HAS_CONTENTS flag so that
10534 elf_link_input_bfd ignores this section. */
10535 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
10538 attr_size
= bfd_elf_obj_attr_size (abfd
);
10541 bfd_set_section_size (abfd
, o
, attr_size
);
10543 /* Skip this section later on. */
10544 o
->map_head
.link_order
= NULL
;
10547 o
->flags
|= SEC_EXCLUDE
;
10551 /* Count up the number of relocations we will output for each output
10552 section, so that we know the sizes of the reloc sections. We
10553 also figure out some maximum sizes. */
10554 max_contents_size
= 0;
10555 max_external_reloc_size
= 0;
10556 max_internal_reloc_count
= 0;
10558 max_sym_shndx_count
= 0;
10560 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10562 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10563 o
->reloc_count
= 0;
10565 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10567 unsigned int reloc_count
= 0;
10568 struct bfd_elf_section_data
*esdi
= NULL
;
10570 if (p
->type
== bfd_section_reloc_link_order
10571 || p
->type
== bfd_symbol_reloc_link_order
)
10573 else if (p
->type
== bfd_indirect_link_order
)
10577 sec
= p
->u
.indirect
.section
;
10578 esdi
= elf_section_data (sec
);
10580 /* Mark all sections which are to be included in the
10581 link. This will normally be every section. We need
10582 to do this so that we can identify any sections which
10583 the linker has decided to not include. */
10584 sec
->linker_mark
= TRUE
;
10586 if (sec
->flags
& SEC_MERGE
)
10589 if (esdo
->this_hdr
.sh_type
== SHT_REL
10590 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
10591 /* Some backends use reloc_count in relocation sections
10592 to count particular types of relocs. Of course,
10593 reloc sections themselves can't have relocations. */
10595 else if (info
->relocatable
|| info
->emitrelocations
)
10596 reloc_count
= sec
->reloc_count
;
10597 else if (bed
->elf_backend_count_relocs
)
10598 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
10600 if (sec
->rawsize
> max_contents_size
)
10601 max_contents_size
= sec
->rawsize
;
10602 if (sec
->size
> max_contents_size
)
10603 max_contents_size
= sec
->size
;
10605 /* We are interested in just local symbols, not all
10607 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
10608 && (sec
->owner
->flags
& DYNAMIC
) == 0)
10612 if (elf_bad_symtab (sec
->owner
))
10613 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
10614 / bed
->s
->sizeof_sym
);
10616 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
10618 if (sym_count
> max_sym_count
)
10619 max_sym_count
= sym_count
;
10621 if (sym_count
> max_sym_shndx_count
10622 && elf_symtab_shndx (sec
->owner
) != 0)
10623 max_sym_shndx_count
= sym_count
;
10625 if ((sec
->flags
& SEC_RELOC
) != 0)
10627 size_t ext_size
= 0;
10629 if (esdi
->rel
.hdr
!= NULL
)
10630 ext_size
= esdi
->rel
.hdr
->sh_size
;
10631 if (esdi
->rela
.hdr
!= NULL
)
10632 ext_size
+= esdi
->rela
.hdr
->sh_size
;
10634 if (ext_size
> max_external_reloc_size
)
10635 max_external_reloc_size
= ext_size
;
10636 if (sec
->reloc_count
> max_internal_reloc_count
)
10637 max_internal_reloc_count
= sec
->reloc_count
;
10642 if (reloc_count
== 0)
10645 o
->reloc_count
+= reloc_count
;
10647 if (p
->type
== bfd_indirect_link_order
10648 && (info
->relocatable
|| info
->emitrelocations
))
10651 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
10652 if (esdi
->rela
.hdr
)
10653 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
10658 esdo
->rela
.count
+= reloc_count
;
10660 esdo
->rel
.count
+= reloc_count
;
10664 if (o
->reloc_count
> 0)
10665 o
->flags
|= SEC_RELOC
;
10668 /* Explicitly clear the SEC_RELOC flag. The linker tends to
10669 set it (this is probably a bug) and if it is set
10670 assign_section_numbers will create a reloc section. */
10671 o
->flags
&=~ SEC_RELOC
;
10674 /* If the SEC_ALLOC flag is not set, force the section VMA to
10675 zero. This is done in elf_fake_sections as well, but forcing
10676 the VMA to 0 here will ensure that relocs against these
10677 sections are handled correctly. */
10678 if ((o
->flags
& SEC_ALLOC
) == 0
10679 && ! o
->user_set_vma
)
10683 if (! info
->relocatable
&& merged
)
10684 elf_link_hash_traverse (elf_hash_table (info
),
10685 _bfd_elf_link_sec_merge_syms
, abfd
);
10687 /* Figure out the file positions for everything but the symbol table
10688 and the relocs. We set symcount to force assign_section_numbers
10689 to create a symbol table. */
10690 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
10691 BFD_ASSERT (! abfd
->output_has_begun
);
10692 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
10695 /* Set sizes, and assign file positions for reloc sections. */
10696 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10698 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10699 if ((o
->flags
& SEC_RELOC
) != 0)
10702 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
10706 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
10710 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
10711 to count upwards while actually outputting the relocations. */
10712 esdo
->rel
.count
= 0;
10713 esdo
->rela
.count
= 0;
10716 _bfd_elf_assign_file_positions_for_relocs (abfd
);
10718 /* We have now assigned file positions for all the sections except
10719 .symtab and .strtab. We start the .symtab section at the current
10720 file position, and write directly to it. We build the .strtab
10721 section in memory. */
10722 bfd_get_symcount (abfd
) = 0;
10723 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
10724 /* sh_name is set in prep_headers. */
10725 symtab_hdr
->sh_type
= SHT_SYMTAB
;
10726 /* sh_flags, sh_addr and sh_size all start off zero. */
10727 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
10728 /* sh_link is set in assign_section_numbers. */
10729 /* sh_info is set below. */
10730 /* sh_offset is set just below. */
10731 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
10733 off
= elf_next_file_pos (abfd
);
10734 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
10736 /* Note that at this point elf_next_file_pos (abfd) is
10737 incorrect. We do not yet know the size of the .symtab section.
10738 We correct next_file_pos below, after we do know the size. */
10740 /* Allocate a buffer to hold swapped out symbols. This is to avoid
10741 continuously seeking to the right position in the file. */
10742 if (! info
->keep_memory
|| max_sym_count
< 20)
10743 flinfo
.symbuf_size
= 20;
10745 flinfo
.symbuf_size
= max_sym_count
;
10746 amt
= flinfo
.symbuf_size
;
10747 amt
*= bed
->s
->sizeof_sym
;
10748 flinfo
.symbuf
= (bfd_byte
*) bfd_malloc (amt
);
10749 if (flinfo
.symbuf
== NULL
)
10751 if (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF))
10753 /* Wild guess at number of output symbols. realloc'd as needed. */
10754 amt
= 2 * max_sym_count
+ elf_numsections (abfd
) + 1000;
10755 flinfo
.shndxbuf_size
= amt
;
10756 amt
*= sizeof (Elf_External_Sym_Shndx
);
10757 flinfo
.symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
10758 if (flinfo
.symshndxbuf
== NULL
)
10762 /* Start writing out the symbol table. The first symbol is always a
10764 if (info
->strip
!= strip_all
10767 elfsym
.st_value
= 0;
10768 elfsym
.st_size
= 0;
10769 elfsym
.st_info
= 0;
10770 elfsym
.st_other
= 0;
10771 elfsym
.st_shndx
= SHN_UNDEF
;
10772 elfsym
.st_target_internal
= 0;
10773 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, bfd_und_section_ptr
,
10778 /* Output a symbol for each section. We output these even if we are
10779 discarding local symbols, since they are used for relocs. These
10780 symbols have no names. We store the index of each one in the
10781 index field of the section, so that we can find it again when
10782 outputting relocs. */
10783 if (info
->strip
!= strip_all
10786 elfsym
.st_size
= 0;
10787 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
10788 elfsym
.st_other
= 0;
10789 elfsym
.st_value
= 0;
10790 elfsym
.st_target_internal
= 0;
10791 for (i
= 1; i
< elf_numsections (abfd
); i
++)
10793 o
= bfd_section_from_elf_index (abfd
, i
);
10796 o
->target_index
= bfd_get_symcount (abfd
);
10797 elfsym
.st_shndx
= i
;
10798 if (!info
->relocatable
)
10799 elfsym
.st_value
= o
->vma
;
10800 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, o
, NULL
) != 1)
10806 /* Allocate some memory to hold information read in from the input
10808 if (max_contents_size
!= 0)
10810 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
10811 if (flinfo
.contents
== NULL
)
10815 if (max_external_reloc_size
!= 0)
10817 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
10818 if (flinfo
.external_relocs
== NULL
)
10822 if (max_internal_reloc_count
!= 0)
10824 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
10825 amt
*= sizeof (Elf_Internal_Rela
);
10826 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
10827 if (flinfo
.internal_relocs
== NULL
)
10831 if (max_sym_count
!= 0)
10833 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
10834 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
10835 if (flinfo
.external_syms
== NULL
)
10838 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
10839 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
10840 if (flinfo
.internal_syms
== NULL
)
10843 amt
= max_sym_count
* sizeof (long);
10844 flinfo
.indices
= (long int *) bfd_malloc (amt
);
10845 if (flinfo
.indices
== NULL
)
10848 amt
= max_sym_count
* sizeof (asection
*);
10849 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
10850 if (flinfo
.sections
== NULL
)
10854 if (max_sym_shndx_count
!= 0)
10856 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
10857 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
10858 if (flinfo
.locsym_shndx
== NULL
)
10862 if (elf_hash_table (info
)->tls_sec
)
10864 bfd_vma base
, end
= 0;
10867 for (sec
= elf_hash_table (info
)->tls_sec
;
10868 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
10871 bfd_size_type size
= sec
->size
;
10874 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
10876 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
10879 size
= ord
->offset
+ ord
->size
;
10881 end
= sec
->vma
+ size
;
10883 base
= elf_hash_table (info
)->tls_sec
->vma
;
10884 /* Only align end of TLS section if static TLS doesn't have special
10885 alignment requirements. */
10886 if (bed
->static_tls_alignment
== 1)
10887 end
= align_power (end
,
10888 elf_hash_table (info
)->tls_sec
->alignment_power
);
10889 elf_hash_table (info
)->tls_size
= end
- base
;
10892 /* Reorder SHF_LINK_ORDER sections. */
10893 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10895 if (!elf_fixup_link_order (abfd
, o
))
10899 /* Since ELF permits relocations to be against local symbols, we
10900 must have the local symbols available when we do the relocations.
10901 Since we would rather only read the local symbols once, and we
10902 would rather not keep them in memory, we handle all the
10903 relocations for a single input file at the same time.
10905 Unfortunately, there is no way to know the total number of local
10906 symbols until we have seen all of them, and the local symbol
10907 indices precede the global symbol indices. This means that when
10908 we are generating relocatable output, and we see a reloc against
10909 a global symbol, we can not know the symbol index until we have
10910 finished examining all the local symbols to see which ones we are
10911 going to output. To deal with this, we keep the relocations in
10912 memory, and don't output them until the end of the link. This is
10913 an unfortunate waste of memory, but I don't see a good way around
10914 it. Fortunately, it only happens when performing a relocatable
10915 link, which is not the common case. FIXME: If keep_memory is set
10916 we could write the relocs out and then read them again; I don't
10917 know how bad the memory loss will be. */
10919 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10920 sub
->output_has_begun
= FALSE
;
10921 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10923 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10925 if (p
->type
== bfd_indirect_link_order
10926 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
10927 == bfd_target_elf_flavour
)
10928 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
10930 if (! sub
->output_has_begun
)
10932 if (! elf_link_input_bfd (&flinfo
, sub
))
10934 sub
->output_has_begun
= TRUE
;
10937 else if (p
->type
== bfd_section_reloc_link_order
10938 || p
->type
== bfd_symbol_reloc_link_order
)
10940 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
10945 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
10947 if (p
->type
== bfd_indirect_link_order
10948 && (bfd_get_flavour (sub
)
10949 == bfd_target_elf_flavour
)
10950 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
10951 != bed
->s
->elfclass
))
10953 const char *iclass
, *oclass
;
10955 if (bed
->s
->elfclass
== ELFCLASS64
)
10957 iclass
= "ELFCLASS32";
10958 oclass
= "ELFCLASS64";
10962 iclass
= "ELFCLASS64";
10963 oclass
= "ELFCLASS32";
10966 bfd_set_error (bfd_error_wrong_format
);
10967 (*_bfd_error_handler
)
10968 (_("%B: file class %s incompatible with %s"),
10969 sub
, iclass
, oclass
);
10978 /* Free symbol buffer if needed. */
10979 if (!info
->reduce_memory_overheads
)
10981 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10982 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10983 && elf_tdata (sub
)->symbuf
)
10985 free (elf_tdata (sub
)->symbuf
);
10986 elf_tdata (sub
)->symbuf
= NULL
;
10990 /* Output any global symbols that got converted to local in a
10991 version script or due to symbol visibility. We do this in a
10992 separate step since ELF requires all local symbols to appear
10993 prior to any global symbols. FIXME: We should only do this if
10994 some global symbols were, in fact, converted to become local.
10995 FIXME: Will this work correctly with the Irix 5 linker? */
10996 eoinfo
.failed
= FALSE
;
10997 eoinfo
.flinfo
= &flinfo
;
10998 eoinfo
.localsyms
= TRUE
;
10999 eoinfo
.need_second_pass
= FALSE
;
11000 eoinfo
.second_pass
= FALSE
;
11001 eoinfo
.file_sym_done
= FALSE
;
11002 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11006 if (eoinfo
.need_second_pass
)
11008 eoinfo
.second_pass
= TRUE
;
11009 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11014 /* If backend needs to output some local symbols not present in the hash
11015 table, do it now. */
11016 if (bed
->elf_backend_output_arch_local_syms
)
11018 typedef int (*out_sym_func
)
11019 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11020 struct elf_link_hash_entry
*);
11022 if (! ((*bed
->elf_backend_output_arch_local_syms
)
11023 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
11027 /* That wrote out all the local symbols. Finish up the symbol table
11028 with the global symbols. Even if we want to strip everything we
11029 can, we still need to deal with those global symbols that got
11030 converted to local in a version script. */
11032 /* The sh_info field records the index of the first non local symbol. */
11033 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
11036 && flinfo
.dynsym_sec
!= NULL
11037 && flinfo
.dynsym_sec
->output_section
!= bfd_abs_section_ptr
)
11039 Elf_Internal_Sym sym
;
11040 bfd_byte
*dynsym
= flinfo
.dynsym_sec
->contents
;
11041 long last_local
= 0;
11043 /* Write out the section symbols for the output sections. */
11044 if (info
->shared
|| elf_hash_table (info
)->is_relocatable_executable
)
11050 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
11052 sym
.st_target_internal
= 0;
11054 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
11060 dynindx
= elf_section_data (s
)->dynindx
;
11063 indx
= elf_section_data (s
)->this_idx
;
11064 BFD_ASSERT (indx
> 0);
11065 sym
.st_shndx
= indx
;
11066 if (! check_dynsym (abfd
, &sym
))
11068 sym
.st_value
= s
->vma
;
11069 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
11070 if (last_local
< dynindx
)
11071 last_local
= dynindx
;
11072 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11076 /* Write out the local dynsyms. */
11077 if (elf_hash_table (info
)->dynlocal
)
11079 struct elf_link_local_dynamic_entry
*e
;
11080 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
11085 /* Copy the internal symbol and turn off visibility.
11086 Note that we saved a word of storage and overwrote
11087 the original st_name with the dynstr_index. */
11089 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
11091 s
= bfd_section_from_elf_index (e
->input_bfd
,
11096 elf_section_data (s
->output_section
)->this_idx
;
11097 if (! check_dynsym (abfd
, &sym
))
11099 sym
.st_value
= (s
->output_section
->vma
11101 + e
->isym
.st_value
);
11104 if (last_local
< e
->dynindx
)
11105 last_local
= e
->dynindx
;
11107 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
11108 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11112 elf_section_data (flinfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
11116 /* We get the global symbols from the hash table. */
11117 eoinfo
.failed
= FALSE
;
11118 eoinfo
.localsyms
= FALSE
;
11119 eoinfo
.flinfo
= &flinfo
;
11120 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11124 /* If backend needs to output some symbols not present in the hash
11125 table, do it now. */
11126 if (bed
->elf_backend_output_arch_syms
)
11128 typedef int (*out_sym_func
)
11129 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11130 struct elf_link_hash_entry
*);
11132 if (! ((*bed
->elf_backend_output_arch_syms
)
11133 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
11137 /* Flush all symbols to the file. */
11138 if (! elf_link_flush_output_syms (&flinfo
, bed
))
11141 /* Now we know the size of the symtab section. */
11142 off
+= symtab_hdr
->sh_size
;
11144 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
11145 if (symtab_shndx_hdr
->sh_name
!= 0)
11147 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
11148 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
11149 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
11150 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
11151 symtab_shndx_hdr
->sh_size
= amt
;
11153 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
11156 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
11157 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
11162 /* Finish up and write out the symbol string table (.strtab)
11164 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
11165 /* sh_name was set in prep_headers. */
11166 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
11167 symstrtab_hdr
->sh_flags
= 0;
11168 symstrtab_hdr
->sh_addr
= 0;
11169 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (flinfo
.symstrtab
);
11170 symstrtab_hdr
->sh_entsize
= 0;
11171 symstrtab_hdr
->sh_link
= 0;
11172 symstrtab_hdr
->sh_info
= 0;
11173 /* sh_offset is set just below. */
11174 symstrtab_hdr
->sh_addralign
= 1;
11176 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, TRUE
);
11177 elf_next_file_pos (abfd
) = off
;
11179 if (bfd_get_symcount (abfd
) > 0)
11181 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
11182 || ! _bfd_stringtab_emit (abfd
, flinfo
.symstrtab
))
11186 /* Adjust the relocs to have the correct symbol indices. */
11187 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11189 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11190 if ((o
->flags
& SEC_RELOC
) == 0)
11193 if (esdo
->rel
.hdr
!= NULL
)
11194 elf_link_adjust_relocs (abfd
, &esdo
->rel
);
11195 if (esdo
->rela
.hdr
!= NULL
)
11196 elf_link_adjust_relocs (abfd
, &esdo
->rela
);
11198 /* Set the reloc_count field to 0 to prevent write_relocs from
11199 trying to swap the relocs out itself. */
11200 o
->reloc_count
= 0;
11203 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
11204 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
11206 /* If we are linking against a dynamic object, or generating a
11207 shared library, finish up the dynamic linking information. */
11210 bfd_byte
*dyncon
, *dynconend
;
11212 /* Fix up .dynamic entries. */
11213 o
= bfd_get_linker_section (dynobj
, ".dynamic");
11214 BFD_ASSERT (o
!= NULL
);
11216 dyncon
= o
->contents
;
11217 dynconend
= o
->contents
+ o
->size
;
11218 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11220 Elf_Internal_Dyn dyn
;
11224 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11231 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
11233 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
11235 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
11236 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
11239 dyn
.d_un
.d_val
= relativecount
;
11246 name
= info
->init_function
;
11249 name
= info
->fini_function
;
11252 struct elf_link_hash_entry
*h
;
11254 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
11255 FALSE
, FALSE
, TRUE
);
11257 && (h
->root
.type
== bfd_link_hash_defined
11258 || h
->root
.type
== bfd_link_hash_defweak
))
11260 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
11261 o
= h
->root
.u
.def
.section
;
11262 if (o
->output_section
!= NULL
)
11263 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
11264 + o
->output_offset
);
11267 /* The symbol is imported from another shared
11268 library and does not apply to this one. */
11269 dyn
.d_un
.d_ptr
= 0;
11276 case DT_PREINIT_ARRAYSZ
:
11277 name
= ".preinit_array";
11279 case DT_INIT_ARRAYSZ
:
11280 name
= ".init_array";
11282 case DT_FINI_ARRAYSZ
:
11283 name
= ".fini_array";
11285 o
= bfd_get_section_by_name (abfd
, name
);
11288 (*_bfd_error_handler
)
11289 (_("%B: could not find output section %s"), abfd
, name
);
11293 (*_bfd_error_handler
)
11294 (_("warning: %s section has zero size"), name
);
11295 dyn
.d_un
.d_val
= o
->size
;
11298 case DT_PREINIT_ARRAY
:
11299 name
= ".preinit_array";
11301 case DT_INIT_ARRAY
:
11302 name
= ".init_array";
11304 case DT_FINI_ARRAY
:
11305 name
= ".fini_array";
11312 name
= ".gnu.hash";
11321 name
= ".gnu.version_d";
11324 name
= ".gnu.version_r";
11327 name
= ".gnu.version";
11329 o
= bfd_get_section_by_name (abfd
, name
);
11332 (*_bfd_error_handler
)
11333 (_("%B: could not find output section %s"), abfd
, name
);
11336 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
11338 (*_bfd_error_handler
)
11339 (_("warning: section '%s' is being made into a note"), name
);
11340 bfd_set_error (bfd_error_nonrepresentable_section
);
11343 dyn
.d_un
.d_ptr
= o
->vma
;
11350 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
11354 dyn
.d_un
.d_val
= 0;
11355 dyn
.d_un
.d_ptr
= 0;
11356 for (i
= 1; i
< elf_numsections (abfd
); i
++)
11358 Elf_Internal_Shdr
*hdr
;
11360 hdr
= elf_elfsections (abfd
)[i
];
11361 if (hdr
->sh_type
== type
11362 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
11364 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
11365 dyn
.d_un
.d_val
+= hdr
->sh_size
;
11368 if (dyn
.d_un
.d_ptr
== 0
11369 || hdr
->sh_addr
< dyn
.d_un
.d_ptr
)
11370 dyn
.d_un
.d_ptr
= hdr
->sh_addr
;
11376 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
11380 /* If we have created any dynamic sections, then output them. */
11381 if (dynobj
!= NULL
)
11383 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
11386 /* Check for DT_TEXTREL (late, in case the backend removes it). */
11387 if (((info
->warn_shared_textrel
&& info
->shared
)
11388 || info
->error_textrel
)
11389 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
11391 bfd_byte
*dyncon
, *dynconend
;
11393 dyncon
= o
->contents
;
11394 dynconend
= o
->contents
+ o
->size
;
11395 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11397 Elf_Internal_Dyn dyn
;
11399 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11401 if (dyn
.d_tag
== DT_TEXTREL
)
11403 if (info
->error_textrel
)
11404 info
->callbacks
->einfo
11405 (_("%P%X: read-only segment has dynamic relocations.\n"));
11407 info
->callbacks
->einfo
11408 (_("%P: warning: creating a DT_TEXTREL in a shared object.\n"));
11414 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
11416 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
11418 || o
->output_section
== bfd_abs_section_ptr
)
11420 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
11422 /* At this point, we are only interested in sections
11423 created by _bfd_elf_link_create_dynamic_sections. */
11426 if (elf_hash_table (info
)->stab_info
.stabstr
== o
)
11428 if (elf_hash_table (info
)->eh_info
.hdr_sec
== o
)
11430 if (strcmp (o
->name
, ".dynstr") != 0)
11432 /* FIXME: octets_per_byte. */
11433 if (! bfd_set_section_contents (abfd
, o
->output_section
,
11435 (file_ptr
) o
->output_offset
,
11441 /* The contents of the .dynstr section are actually in a
11443 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
11444 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
11445 || ! _bfd_elf_strtab_emit (abfd
,
11446 elf_hash_table (info
)->dynstr
))
11452 if (info
->relocatable
)
11454 bfd_boolean failed
= FALSE
;
11456 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
11461 /* If we have optimized stabs strings, output them. */
11462 if (elf_hash_table (info
)->stab_info
.stabstr
!= NULL
)
11464 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
11468 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
11471 elf_final_link_free (abfd
, &flinfo
);
11473 elf_linker (abfd
) = TRUE
;
11477 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
11478 if (contents
== NULL
)
11479 return FALSE
; /* Bail out and fail. */
11480 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
11481 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
11488 elf_final_link_free (abfd
, &flinfo
);
11492 /* Initialize COOKIE for input bfd ABFD. */
11495 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
11496 struct bfd_link_info
*info
, bfd
*abfd
)
11498 Elf_Internal_Shdr
*symtab_hdr
;
11499 const struct elf_backend_data
*bed
;
11501 bed
= get_elf_backend_data (abfd
);
11502 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11504 cookie
->abfd
= abfd
;
11505 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
11506 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
11507 if (cookie
->bad_symtab
)
11509 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
11510 cookie
->extsymoff
= 0;
11514 cookie
->locsymcount
= symtab_hdr
->sh_info
;
11515 cookie
->extsymoff
= symtab_hdr
->sh_info
;
11518 if (bed
->s
->arch_size
== 32)
11519 cookie
->r_sym_shift
= 8;
11521 cookie
->r_sym_shift
= 32;
11523 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
11524 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
11526 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
11527 cookie
->locsymcount
, 0,
11529 if (cookie
->locsyms
== NULL
)
11531 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
11534 if (info
->keep_memory
)
11535 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
11540 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
11543 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
11545 Elf_Internal_Shdr
*symtab_hdr
;
11547 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11548 if (cookie
->locsyms
!= NULL
11549 && symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
11550 free (cookie
->locsyms
);
11553 /* Initialize the relocation information in COOKIE for input section SEC
11554 of input bfd ABFD. */
11557 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11558 struct bfd_link_info
*info
, bfd
*abfd
,
11561 const struct elf_backend_data
*bed
;
11563 if (sec
->reloc_count
== 0)
11565 cookie
->rels
= NULL
;
11566 cookie
->relend
= NULL
;
11570 bed
= get_elf_backend_data (abfd
);
11572 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
11573 info
->keep_memory
);
11574 if (cookie
->rels
== NULL
)
11576 cookie
->rel
= cookie
->rels
;
11577 cookie
->relend
= (cookie
->rels
11578 + sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
);
11580 cookie
->rel
= cookie
->rels
;
11584 /* Free the memory allocated by init_reloc_cookie_rels,
11588 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11591 if (cookie
->rels
&& elf_section_data (sec
)->relocs
!= cookie
->rels
)
11592 free (cookie
->rels
);
11595 /* Initialize the whole of COOKIE for input section SEC. */
11598 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11599 struct bfd_link_info
*info
,
11602 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
11604 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
11609 fini_reloc_cookie (cookie
, sec
->owner
);
11614 /* Free the memory allocated by init_reloc_cookie_for_section,
11618 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11621 fini_reloc_cookie_rels (cookie
, sec
);
11622 fini_reloc_cookie (cookie
, sec
->owner
);
11625 /* Garbage collect unused sections. */
11627 /* Default gc_mark_hook. */
11630 _bfd_elf_gc_mark_hook (asection
*sec
,
11631 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
11632 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
11633 struct elf_link_hash_entry
*h
,
11634 Elf_Internal_Sym
*sym
)
11636 const char *sec_name
;
11640 switch (h
->root
.type
)
11642 case bfd_link_hash_defined
:
11643 case bfd_link_hash_defweak
:
11644 return h
->root
.u
.def
.section
;
11646 case bfd_link_hash_common
:
11647 return h
->root
.u
.c
.p
->section
;
11649 case bfd_link_hash_undefined
:
11650 case bfd_link_hash_undefweak
:
11651 /* To work around a glibc bug, keep all XXX input sections
11652 when there is an as yet undefined reference to __start_XXX
11653 or __stop_XXX symbols. The linker will later define such
11654 symbols for orphan input sections that have a name
11655 representable as a C identifier. */
11656 if (strncmp (h
->root
.root
.string
, "__start_", 8) == 0)
11657 sec_name
= h
->root
.root
.string
+ 8;
11658 else if (strncmp (h
->root
.root
.string
, "__stop_", 7) == 0)
11659 sec_name
= h
->root
.root
.string
+ 7;
11663 if (sec_name
&& *sec_name
!= '\0')
11667 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
11669 sec
= bfd_get_section_by_name (i
, sec_name
);
11671 sec
->flags
|= SEC_KEEP
;
11681 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
11686 /* COOKIE->rel describes a relocation against section SEC, which is
11687 a section we've decided to keep. Return the section that contains
11688 the relocation symbol, or NULL if no section contains it. */
11691 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
11692 elf_gc_mark_hook_fn gc_mark_hook
,
11693 struct elf_reloc_cookie
*cookie
)
11695 unsigned long r_symndx
;
11696 struct elf_link_hash_entry
*h
;
11698 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
11699 if (r_symndx
== STN_UNDEF
)
11702 if (r_symndx
>= cookie
->locsymcount
11703 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
11705 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
11706 while (h
->root
.type
== bfd_link_hash_indirect
11707 || h
->root
.type
== bfd_link_hash_warning
)
11708 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11710 /* If this symbol is weak and there is a non-weak definition, we
11711 keep the non-weak definition because many backends put
11712 dynamic reloc info on the non-weak definition for code
11713 handling copy relocs. */
11714 if (h
->u
.weakdef
!= NULL
)
11715 h
->u
.weakdef
->mark
= 1;
11716 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
11719 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
11720 &cookie
->locsyms
[r_symndx
]);
11723 /* COOKIE->rel describes a relocation against section SEC, which is
11724 a section we've decided to keep. Mark the section that contains
11725 the relocation symbol. */
11728 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
11730 elf_gc_mark_hook_fn gc_mark_hook
,
11731 struct elf_reloc_cookie
*cookie
)
11735 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
);
11736 if (rsec
&& !rsec
->gc_mark
)
11738 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
11739 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
11741 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
11747 /* The mark phase of garbage collection. For a given section, mark
11748 it and any sections in this section's group, and all the sections
11749 which define symbols to which it refers. */
11752 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
11754 elf_gc_mark_hook_fn gc_mark_hook
)
11757 asection
*group_sec
, *eh_frame
;
11761 /* Mark all the sections in the group. */
11762 group_sec
= elf_section_data (sec
)->next_in_group
;
11763 if (group_sec
&& !group_sec
->gc_mark
)
11764 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
11767 /* Look through the section relocs. */
11769 eh_frame
= elf_eh_frame_section (sec
->owner
);
11770 if ((sec
->flags
& SEC_RELOC
) != 0
11771 && sec
->reloc_count
> 0
11772 && sec
!= eh_frame
)
11774 struct elf_reloc_cookie cookie
;
11776 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
11780 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
11781 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
11786 fini_reloc_cookie_for_section (&cookie
, sec
);
11790 if (ret
&& eh_frame
&& elf_fde_list (sec
))
11792 struct elf_reloc_cookie cookie
;
11794 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
11798 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
11799 gc_mark_hook
, &cookie
))
11801 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
11808 /* Keep debug and special sections. */
11811 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
11812 elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED
)
11816 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11819 bfd_boolean some_kept
;
11820 bfd_boolean debug_frag_seen
;
11822 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
11825 /* Ensure all linker created sections are kept,
11826 see if any other section is already marked,
11827 and note if we have any fragmented debug sections. */
11828 debug_frag_seen
= some_kept
= FALSE
;
11829 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11831 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
11833 else if (isec
->gc_mark
)
11836 if (debug_frag_seen
== FALSE
11837 && (isec
->flags
& SEC_DEBUGGING
)
11838 && CONST_STRNEQ (isec
->name
, ".debug_line."))
11839 debug_frag_seen
= TRUE
;
11842 /* If no section in this file will be kept, then we can
11843 toss out the debug and special sections. */
11847 /* Keep debug and special sections like .comment when they are
11848 not part of a group, or when we have single-member groups. */
11849 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11850 if ((elf_next_in_group (isec
) == NULL
11851 || elf_next_in_group (isec
) == isec
)
11852 && ((isec
->flags
& SEC_DEBUGGING
) != 0
11853 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0))
11856 if (! debug_frag_seen
)
11859 /* Look for CODE sections which are going to be discarded,
11860 and find and discard any fragmented debug sections which
11861 are associated with that code section. */
11862 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11863 if ((isec
->flags
& SEC_CODE
) != 0
11864 && isec
->gc_mark
== 0)
11869 ilen
= strlen (isec
->name
);
11871 /* Association is determined by the name of the debug section
11872 containing the name of the code section as a suffix. For
11873 example .debug_line.text.foo is a debug section associated
11875 for (dsec
= ibfd
->sections
; dsec
!= NULL
; dsec
= dsec
->next
)
11879 if (dsec
->gc_mark
== 0
11880 || (dsec
->flags
& SEC_DEBUGGING
) == 0)
11883 dlen
= strlen (dsec
->name
);
11886 && strncmp (dsec
->name
+ (dlen
- ilen
),
11887 isec
->name
, ilen
) == 0)
11898 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
11900 struct elf_gc_sweep_symbol_info
11902 struct bfd_link_info
*info
;
11903 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
11908 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
11911 && (((h
->root
.type
== bfd_link_hash_defined
11912 || h
->root
.type
== bfd_link_hash_defweak
)
11913 && !(h
->def_regular
11914 && h
->root
.u
.def
.section
->gc_mark
))
11915 || h
->root
.type
== bfd_link_hash_undefined
11916 || h
->root
.type
== bfd_link_hash_undefweak
))
11918 struct elf_gc_sweep_symbol_info
*inf
;
11920 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
11921 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
11922 h
->def_regular
= 0;
11923 h
->ref_regular
= 0;
11924 h
->ref_regular_nonweak
= 0;
11930 /* The sweep phase of garbage collection. Remove all garbage sections. */
11932 typedef bfd_boolean (*gc_sweep_hook_fn
)
11933 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
11936 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
11939 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11940 gc_sweep_hook_fn gc_sweep_hook
= bed
->gc_sweep_hook
;
11941 unsigned long section_sym_count
;
11942 struct elf_gc_sweep_symbol_info sweep_info
;
11944 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
11948 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
11951 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
11953 /* When any section in a section group is kept, we keep all
11954 sections in the section group. If the first member of
11955 the section group is excluded, we will also exclude the
11957 if (o
->flags
& SEC_GROUP
)
11959 asection
*first
= elf_next_in_group (o
);
11960 o
->gc_mark
= first
->gc_mark
;
11966 /* Skip sweeping sections already excluded. */
11967 if (o
->flags
& SEC_EXCLUDE
)
11970 /* Since this is early in the link process, it is simple
11971 to remove a section from the output. */
11972 o
->flags
|= SEC_EXCLUDE
;
11974 if (info
->print_gc_sections
&& o
->size
!= 0)
11975 _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub
, o
->name
);
11977 /* But we also have to update some of the relocation
11978 info we collected before. */
11980 && (o
->flags
& SEC_RELOC
) != 0
11981 && o
->reloc_count
> 0
11982 && !bfd_is_abs_section (o
->output_section
))
11984 Elf_Internal_Rela
*internal_relocs
;
11988 = _bfd_elf_link_read_relocs (o
->owner
, o
, NULL
, NULL
,
11989 info
->keep_memory
);
11990 if (internal_relocs
== NULL
)
11993 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
11995 if (elf_section_data (o
)->relocs
!= internal_relocs
)
11996 free (internal_relocs
);
12004 /* Remove the symbols that were in the swept sections from the dynamic
12005 symbol table. GCFIXME: Anyone know how to get them out of the
12006 static symbol table as well? */
12007 sweep_info
.info
= info
;
12008 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
12009 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
12012 _bfd_elf_link_renumber_dynsyms (abfd
, info
, §ion_sym_count
);
12016 /* Propagate collected vtable information. This is called through
12017 elf_link_hash_traverse. */
12020 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
12022 /* Those that are not vtables. */
12023 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12026 /* Those vtables that do not have parents, we cannot merge. */
12027 if (h
->vtable
->parent
== (struct elf_link_hash_entry
*) -1)
12030 /* If we've already been done, exit. */
12031 if (h
->vtable
->used
&& h
->vtable
->used
[-1])
12034 /* Make sure the parent's table is up to date. */
12035 elf_gc_propagate_vtable_entries_used (h
->vtable
->parent
, okp
);
12037 if (h
->vtable
->used
== NULL
)
12039 /* None of this table's entries were referenced. Re-use the
12041 h
->vtable
->used
= h
->vtable
->parent
->vtable
->used
;
12042 h
->vtable
->size
= h
->vtable
->parent
->vtable
->size
;
12047 bfd_boolean
*cu
, *pu
;
12049 /* Or the parent's entries into ours. */
12050 cu
= h
->vtable
->used
;
12052 pu
= h
->vtable
->parent
->vtable
->used
;
12055 const struct elf_backend_data
*bed
;
12056 unsigned int log_file_align
;
12058 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
12059 log_file_align
= bed
->s
->log_file_align
;
12060 n
= h
->vtable
->parent
->vtable
->size
>> log_file_align
;
12075 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
12078 bfd_vma hstart
, hend
;
12079 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
12080 const struct elf_backend_data
*bed
;
12081 unsigned int log_file_align
;
12083 /* Take care of both those symbols that do not describe vtables as
12084 well as those that are not loaded. */
12085 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12088 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
12089 || h
->root
.type
== bfd_link_hash_defweak
);
12091 sec
= h
->root
.u
.def
.section
;
12092 hstart
= h
->root
.u
.def
.value
;
12093 hend
= hstart
+ h
->size
;
12095 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
12097 return *(bfd_boolean
*) okp
= FALSE
;
12098 bed
= get_elf_backend_data (sec
->owner
);
12099 log_file_align
= bed
->s
->log_file_align
;
12101 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
12103 for (rel
= relstart
; rel
< relend
; ++rel
)
12104 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
12106 /* If the entry is in use, do nothing. */
12107 if (h
->vtable
->used
12108 && (rel
->r_offset
- hstart
) < h
->vtable
->size
)
12110 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
12111 if (h
->vtable
->used
[entry
])
12114 /* Otherwise, kill it. */
12115 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
12121 /* Mark sections containing dynamically referenced symbols. When
12122 building shared libraries, we must assume that any visible symbol is
12126 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
12128 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
12130 if ((h
->root
.type
== bfd_link_hash_defined
12131 || h
->root
.type
== bfd_link_hash_defweak
)
12133 || ((!info
->executable
|| info
->export_dynamic
)
12135 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
12136 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
12137 && (strchr (h
->root
.root
.string
, ELF_VER_CHR
) != NULL
12138 || !bfd_hide_sym_by_version (info
->version_info
,
12139 h
->root
.root
.string
)))))
12140 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12145 /* Keep all sections containing symbols undefined on the command-line,
12146 and the section containing the entry symbol. */
12149 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
12151 struct bfd_sym_chain
*sym
;
12153 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
12155 struct elf_link_hash_entry
*h
;
12157 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
12158 FALSE
, FALSE
, FALSE
);
12161 && (h
->root
.type
== bfd_link_hash_defined
12162 || h
->root
.type
== bfd_link_hash_defweak
)
12163 && !bfd_is_abs_section (h
->root
.u
.def
.section
))
12164 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12168 /* Do mark and sweep of unused sections. */
12171 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
12173 bfd_boolean ok
= TRUE
;
12175 elf_gc_mark_hook_fn gc_mark_hook
;
12176 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12178 if (!bed
->can_gc_sections
12179 || !is_elf_hash_table (info
->hash
))
12181 (*_bfd_error_handler
)(_("Warning: gc-sections option ignored"));
12185 bed
->gc_keep (info
);
12187 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
12188 at the .eh_frame section if we can mark the FDEs individually. */
12189 _bfd_elf_begin_eh_frame_parsing (info
);
12190 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12193 struct elf_reloc_cookie cookie
;
12195 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
12196 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
12198 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
12199 if (elf_section_data (sec
)->sec_info
12200 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
12201 elf_eh_frame_section (sub
) = sec
;
12202 fini_reloc_cookie_for_section (&cookie
, sec
);
12203 sec
= bfd_get_next_section_by_name (sec
);
12206 _bfd_elf_end_eh_frame_parsing (info
);
12208 /* Apply transitive closure to the vtable entry usage info. */
12209 elf_link_hash_traverse (elf_hash_table (info
),
12210 elf_gc_propagate_vtable_entries_used
,
12215 /* Kill the vtable relocations that were not used. */
12216 elf_link_hash_traverse (elf_hash_table (info
),
12217 elf_gc_smash_unused_vtentry_relocs
,
12222 /* Mark dynamically referenced symbols. */
12223 if (elf_hash_table (info
)->dynamic_sections_created
)
12224 elf_link_hash_traverse (elf_hash_table (info
),
12225 bed
->gc_mark_dynamic_ref
,
12228 /* Grovel through relocs to find out who stays ... */
12229 gc_mark_hook
= bed
->gc_mark_hook
;
12230 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12234 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
12237 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
12238 Also treat note sections as a root, if the section is not part
12240 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12242 && (o
->flags
& SEC_EXCLUDE
) == 0
12243 && ((o
->flags
& SEC_KEEP
) != 0
12244 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
12245 && elf_next_in_group (o
) == NULL
)))
12247 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
12252 /* Allow the backend to mark additional target specific sections. */
12253 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
12255 /* ... and mark SEC_EXCLUDE for those that go. */
12256 return elf_gc_sweep (abfd
, info
);
12259 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
12262 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
12264 struct elf_link_hash_entry
*h
,
12267 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
12268 struct elf_link_hash_entry
**search
, *child
;
12269 bfd_size_type extsymcount
;
12270 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12272 /* The sh_info field of the symtab header tells us where the
12273 external symbols start. We don't care about the local symbols at
12275 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
12276 if (!elf_bad_symtab (abfd
))
12277 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
12279 sym_hashes
= elf_sym_hashes (abfd
);
12280 sym_hashes_end
= sym_hashes
+ extsymcount
;
12282 /* Hunt down the child symbol, which is in this section at the same
12283 offset as the relocation. */
12284 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
12286 if ((child
= *search
) != NULL
12287 && (child
->root
.type
== bfd_link_hash_defined
12288 || child
->root
.type
== bfd_link_hash_defweak
)
12289 && child
->root
.u
.def
.section
== sec
12290 && child
->root
.u
.def
.value
== offset
)
12294 (*_bfd_error_handler
) ("%B: %A+%lu: No symbol found for INHERIT",
12295 abfd
, sec
, (unsigned long) offset
);
12296 bfd_set_error (bfd_error_invalid_operation
);
12300 if (!child
->vtable
)
12302 child
->vtable
= (struct elf_link_virtual_table_entry
*)
12303 bfd_zalloc (abfd
, sizeof (*child
->vtable
));
12304 if (!child
->vtable
)
12309 /* This *should* only be the absolute section. It could potentially
12310 be that someone has defined a non-global vtable though, which
12311 would be bad. It isn't worth paging in the local symbols to be
12312 sure though; that case should simply be handled by the assembler. */
12314 child
->vtable
->parent
= (struct elf_link_hash_entry
*) -1;
12317 child
->vtable
->parent
= h
;
12322 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
12325 bfd_elf_gc_record_vtentry (bfd
*abfd ATTRIBUTE_UNUSED
,
12326 asection
*sec ATTRIBUTE_UNUSED
,
12327 struct elf_link_hash_entry
*h
,
12330 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12331 unsigned int log_file_align
= bed
->s
->log_file_align
;
12335 h
->vtable
= (struct elf_link_virtual_table_entry
*)
12336 bfd_zalloc (abfd
, sizeof (*h
->vtable
));
12341 if (addend
>= h
->vtable
->size
)
12343 size_t size
, bytes
, file_align
;
12344 bfd_boolean
*ptr
= h
->vtable
->used
;
12346 /* While the symbol is undefined, we have to be prepared to handle
12348 file_align
= 1 << log_file_align
;
12349 if (h
->root
.type
== bfd_link_hash_undefined
)
12350 size
= addend
+ file_align
;
12354 if (addend
>= size
)
12356 /* Oops! We've got a reference past the defined end of
12357 the table. This is probably a bug -- shall we warn? */
12358 size
= addend
+ file_align
;
12361 size
= (size
+ file_align
- 1) & -file_align
;
12363 /* Allocate one extra entry for use as a "done" flag for the
12364 consolidation pass. */
12365 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
12369 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
12375 oldbytes
= (((h
->vtable
->size
>> log_file_align
) + 1)
12376 * sizeof (bfd_boolean
));
12377 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
12381 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
12386 /* And arrange for that done flag to be at index -1. */
12387 h
->vtable
->used
= ptr
+ 1;
12388 h
->vtable
->size
= size
;
12391 h
->vtable
->used
[addend
>> log_file_align
] = TRUE
;
12396 /* Map an ELF section header flag to its corresponding string. */
12400 flagword flag_value
;
12401 } elf_flags_to_name_table
;
12403 static elf_flags_to_name_table elf_flags_to_names
[] =
12405 { "SHF_WRITE", SHF_WRITE
},
12406 { "SHF_ALLOC", SHF_ALLOC
},
12407 { "SHF_EXECINSTR", SHF_EXECINSTR
},
12408 { "SHF_MERGE", SHF_MERGE
},
12409 { "SHF_STRINGS", SHF_STRINGS
},
12410 { "SHF_INFO_LINK", SHF_INFO_LINK
},
12411 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
12412 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
12413 { "SHF_GROUP", SHF_GROUP
},
12414 { "SHF_TLS", SHF_TLS
},
12415 { "SHF_MASKOS", SHF_MASKOS
},
12416 { "SHF_EXCLUDE", SHF_EXCLUDE
},
12419 /* Returns TRUE if the section is to be included, otherwise FALSE. */
12421 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
12422 struct flag_info
*flaginfo
,
12425 const bfd_vma sh_flags
= elf_section_flags (section
);
12427 if (!flaginfo
->flags_initialized
)
12429 bfd
*obfd
= info
->output_bfd
;
12430 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12431 struct flag_info_list
*tf
= flaginfo
->flag_list
;
12433 int without_hex
= 0;
12435 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
12438 flagword (*lookup
) (char *);
12440 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
12441 if (lookup
!= NULL
)
12443 flagword hexval
= (*lookup
) ((char *) tf
->name
);
12447 if (tf
->with
== with_flags
)
12448 with_hex
|= hexval
;
12449 else if (tf
->with
== without_flags
)
12450 without_hex
|= hexval
;
12455 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
12457 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
12459 if (tf
->with
== with_flags
)
12460 with_hex
|= elf_flags_to_names
[i
].flag_value
;
12461 else if (tf
->with
== without_flags
)
12462 without_hex
|= elf_flags_to_names
[i
].flag_value
;
12469 info
->callbacks
->einfo
12470 (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
12474 flaginfo
->flags_initialized
= TRUE
;
12475 flaginfo
->only_with_flags
|= with_hex
;
12476 flaginfo
->not_with_flags
|= without_hex
;
12479 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
12482 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
12488 struct alloc_got_off_arg
{
12490 struct bfd_link_info
*info
;
12493 /* We need a special top-level link routine to convert got reference counts
12494 to real got offsets. */
12497 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
12499 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
12500 bfd
*obfd
= gofarg
->info
->output_bfd
;
12501 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12503 if (h
->got
.refcount
> 0)
12505 h
->got
.offset
= gofarg
->gotoff
;
12506 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
12509 h
->got
.offset
= (bfd_vma
) -1;
12514 /* And an accompanying bit to work out final got entry offsets once
12515 we're done. Should be called from final_link. */
12518 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
12519 struct bfd_link_info
*info
)
12522 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12524 struct alloc_got_off_arg gofarg
;
12526 BFD_ASSERT (abfd
== info
->output_bfd
);
12528 if (! is_elf_hash_table (info
->hash
))
12531 /* The GOT offset is relative to the .got section, but the GOT header is
12532 put into the .got.plt section, if the backend uses it. */
12533 if (bed
->want_got_plt
)
12536 gotoff
= bed
->got_header_size
;
12538 /* Do the local .got entries first. */
12539 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
12541 bfd_signed_vma
*local_got
;
12542 bfd_size_type j
, locsymcount
;
12543 Elf_Internal_Shdr
*symtab_hdr
;
12545 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
12548 local_got
= elf_local_got_refcounts (i
);
12552 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
12553 if (elf_bad_symtab (i
))
12554 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
12556 locsymcount
= symtab_hdr
->sh_info
;
12558 for (j
= 0; j
< locsymcount
; ++j
)
12560 if (local_got
[j
] > 0)
12562 local_got
[j
] = gotoff
;
12563 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
12566 local_got
[j
] = (bfd_vma
) -1;
12570 /* Then the global .got entries. .plt refcounts are handled by
12571 adjust_dynamic_symbol */
12572 gofarg
.gotoff
= gotoff
;
12573 gofarg
.info
= info
;
12574 elf_link_hash_traverse (elf_hash_table (info
),
12575 elf_gc_allocate_got_offsets
,
12580 /* Many folk need no more in the way of final link than this, once
12581 got entry reference counting is enabled. */
12584 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
12586 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
12589 /* Invoke the regular ELF backend linker to do all the work. */
12590 return bfd_elf_final_link (abfd
, info
);
12594 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
12596 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
12598 if (rcookie
->bad_symtab
)
12599 rcookie
->rel
= rcookie
->rels
;
12601 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
12603 unsigned long r_symndx
;
12605 if (! rcookie
->bad_symtab
)
12606 if (rcookie
->rel
->r_offset
> offset
)
12608 if (rcookie
->rel
->r_offset
!= offset
)
12611 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
12612 if (r_symndx
== STN_UNDEF
)
12615 if (r_symndx
>= rcookie
->locsymcount
12616 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
12618 struct elf_link_hash_entry
*h
;
12620 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
12622 while (h
->root
.type
== bfd_link_hash_indirect
12623 || h
->root
.type
== bfd_link_hash_warning
)
12624 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12626 if ((h
->root
.type
== bfd_link_hash_defined
12627 || h
->root
.type
== bfd_link_hash_defweak
)
12628 && discarded_section (h
->root
.u
.def
.section
))
12635 /* It's not a relocation against a global symbol,
12636 but it could be a relocation against a local
12637 symbol for a discarded section. */
12639 Elf_Internal_Sym
*isym
;
12641 /* Need to: get the symbol; get the section. */
12642 isym
= &rcookie
->locsyms
[r_symndx
];
12643 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
12644 if (isec
!= NULL
&& discarded_section (isec
))
12652 /* Discard unneeded references to discarded sections.
12653 Returns TRUE if any section's size was changed. */
12654 /* This function assumes that the relocations are in sorted order,
12655 which is true for all known assemblers. */
12658 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
12660 struct elf_reloc_cookie cookie
;
12661 asection
*stab
, *eh
;
12662 const struct elf_backend_data
*bed
;
12664 bfd_boolean ret
= FALSE
;
12666 if (info
->traditional_format
12667 || !is_elf_hash_table (info
->hash
))
12670 _bfd_elf_begin_eh_frame_parsing (info
);
12671 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link_next
)
12673 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
12676 bed
= get_elf_backend_data (abfd
);
12679 if (!info
->relocatable
)
12681 eh
= bfd_get_section_by_name (abfd
, ".eh_frame");
12684 || bfd_is_abs_section (eh
->output_section
)))
12685 eh
= bfd_get_next_section_by_name (eh
);
12688 stab
= bfd_get_section_by_name (abfd
, ".stab");
12690 && (stab
->size
== 0
12691 || bfd_is_abs_section (stab
->output_section
)
12692 || stab
->sec_info_type
!= SEC_INFO_TYPE_STABS
))
12697 && bed
->elf_backend_discard_info
== NULL
)
12700 if (!init_reloc_cookie (&cookie
, info
, abfd
))
12704 && stab
->reloc_count
> 0
12705 && init_reloc_cookie_rels (&cookie
, info
, abfd
, stab
))
12707 if (_bfd_discard_section_stabs (abfd
, stab
,
12708 elf_section_data (stab
)->sec_info
,
12709 bfd_elf_reloc_symbol_deleted_p
,
12712 fini_reloc_cookie_rels (&cookie
, stab
);
12716 && init_reloc_cookie_rels (&cookie
, info
, abfd
, eh
))
12718 _bfd_elf_parse_eh_frame (abfd
, info
, eh
, &cookie
);
12719 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, eh
,
12720 bfd_elf_reloc_symbol_deleted_p
,
12723 fini_reloc_cookie_rels (&cookie
, eh
);
12724 eh
= bfd_get_next_section_by_name (eh
);
12727 if (bed
->elf_backend_discard_info
!= NULL
12728 && (*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
12731 fini_reloc_cookie (&cookie
, abfd
);
12733 _bfd_elf_end_eh_frame_parsing (info
);
12735 if (info
->eh_frame_hdr
12736 && !info
->relocatable
12737 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
12744 _bfd_elf_section_already_linked (bfd
*abfd
,
12746 struct bfd_link_info
*info
)
12749 const char *name
, *key
;
12750 struct bfd_section_already_linked
*l
;
12751 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
12753 if (sec
->output_section
== bfd_abs_section_ptr
)
12756 flags
= sec
->flags
;
12758 /* Return if it isn't a linkonce section. A comdat group section
12759 also has SEC_LINK_ONCE set. */
12760 if ((flags
& SEC_LINK_ONCE
) == 0)
12763 /* Don't put group member sections on our list of already linked
12764 sections. They are handled as a group via their group section. */
12765 if (elf_sec_group (sec
) != NULL
)
12768 /* For a SHT_GROUP section, use the group signature as the key. */
12770 if ((flags
& SEC_GROUP
) != 0
12771 && elf_next_in_group (sec
) != NULL
12772 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
12773 key
= elf_group_name (elf_next_in_group (sec
));
12776 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
12777 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
12778 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
12781 /* Must be a user linkonce section that doesn't follow gcc's
12782 naming convention. In this case we won't be matching
12783 single member groups. */
12787 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
12789 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12791 /* We may have 2 different types of sections on the list: group
12792 sections with a signature of <key> (<key> is some string),
12793 and linkonce sections named .gnu.linkonce.<type>.<key>.
12794 Match like sections. LTO plugin sections are an exception.
12795 They are always named .gnu.linkonce.t.<key> and match either
12796 type of section. */
12797 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
12798 && ((flags
& SEC_GROUP
) != 0
12799 || strcmp (name
, l
->sec
->name
) == 0))
12800 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0)
12802 /* The section has already been linked. See if we should
12803 issue a warning. */
12804 if (!_bfd_handle_already_linked (sec
, l
, info
))
12807 if (flags
& SEC_GROUP
)
12809 asection
*first
= elf_next_in_group (sec
);
12810 asection
*s
= first
;
12814 s
->output_section
= bfd_abs_section_ptr
;
12815 /* Record which group discards it. */
12816 s
->kept_section
= l
->sec
;
12817 s
= elf_next_in_group (s
);
12818 /* These lists are circular. */
12828 /* A single member comdat group section may be discarded by a
12829 linkonce section and vice versa. */
12830 if ((flags
& SEC_GROUP
) != 0)
12832 asection
*first
= elf_next_in_group (sec
);
12834 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
12835 /* Check this single member group against linkonce sections. */
12836 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12837 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12838 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
12840 first
->output_section
= bfd_abs_section_ptr
;
12841 first
->kept_section
= l
->sec
;
12842 sec
->output_section
= bfd_abs_section_ptr
;
12847 /* Check this linkonce section against single member groups. */
12848 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12849 if (l
->sec
->flags
& SEC_GROUP
)
12851 asection
*first
= elf_next_in_group (l
->sec
);
12854 && elf_next_in_group (first
) == first
12855 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
12857 sec
->output_section
= bfd_abs_section_ptr
;
12858 sec
->kept_section
= first
;
12863 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
12864 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
12865 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
12866 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
12867 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
12868 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
12869 `.gnu.linkonce.t.F' section from a different bfd not requiring any
12870 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
12871 The reverse order cannot happen as there is never a bfd with only the
12872 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
12873 matter as here were are looking only for cross-bfd sections. */
12875 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
12876 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12877 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12878 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
12880 if (abfd
!= l
->sec
->owner
)
12881 sec
->output_section
= bfd_abs_section_ptr
;
12885 /* This is the first section with this name. Record it. */
12886 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
12887 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
12888 return sec
->output_section
== bfd_abs_section_ptr
;
12892 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
12894 return sym
->st_shndx
== SHN_COMMON
;
12898 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
12904 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
12906 return bfd_com_section_ptr
;
12910 _bfd_elf_default_got_elt_size (bfd
*abfd
,
12911 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12912 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
12913 bfd
*ibfd ATTRIBUTE_UNUSED
,
12914 unsigned long symndx ATTRIBUTE_UNUSED
)
12916 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12917 return bed
->s
->arch_size
/ 8;
12920 /* Routines to support the creation of dynamic relocs. */
12922 /* Returns the name of the dynamic reloc section associated with SEC. */
12924 static const char *
12925 get_dynamic_reloc_section_name (bfd
* abfd
,
12927 bfd_boolean is_rela
)
12930 const char *old_name
= bfd_get_section_name (NULL
, sec
);
12931 const char *prefix
= is_rela
? ".rela" : ".rel";
12933 if (old_name
== NULL
)
12936 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
12937 sprintf (name
, "%s%s", prefix
, old_name
);
12942 /* Returns the dynamic reloc section associated with SEC.
12943 If necessary compute the name of the dynamic reloc section based
12944 on SEC's name (looked up in ABFD's string table) and the setting
12948 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
12950 bfd_boolean is_rela
)
12952 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12954 if (reloc_sec
== NULL
)
12956 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12960 reloc_sec
= bfd_get_linker_section (abfd
, name
);
12962 if (reloc_sec
!= NULL
)
12963 elf_section_data (sec
)->sreloc
= reloc_sec
;
12970 /* Returns the dynamic reloc section associated with SEC. If the
12971 section does not exist it is created and attached to the DYNOBJ
12972 bfd and stored in the SRELOC field of SEC's elf_section_data
12975 ALIGNMENT is the alignment for the newly created section and
12976 IS_RELA defines whether the name should be .rela.<SEC's name>
12977 or .rel.<SEC's name>. The section name is looked up in the
12978 string table associated with ABFD. */
12981 _bfd_elf_make_dynamic_reloc_section (asection
* sec
,
12983 unsigned int alignment
,
12985 bfd_boolean is_rela
)
12987 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12989 if (reloc_sec
== NULL
)
12991 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12996 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
12998 if (reloc_sec
== NULL
)
13000 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
13001 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
13002 if ((sec
->flags
& SEC_ALLOC
) != 0)
13003 flags
|= SEC_ALLOC
| SEC_LOAD
;
13005 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
13006 if (reloc_sec
!= NULL
)
13008 /* _bfd_elf_get_sec_type_attr chooses a section type by
13009 name. Override as it may be wrong, eg. for a user
13010 section named "auto" we'll get ".relauto" which is
13011 seen to be a .rela section. */
13012 elf_section_type (reloc_sec
) = is_rela
? SHT_RELA
: SHT_REL
;
13013 if (! bfd_set_section_alignment (dynobj
, reloc_sec
, alignment
))
13018 elf_section_data (sec
)->sreloc
= reloc_sec
;
13024 /* Copy the ELF symbol type associated with a linker hash entry. */
13026 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd ATTRIBUTE_UNUSED
,
13027 struct bfd_link_hash_entry
* hdest
,
13028 struct bfd_link_hash_entry
* hsrc
)
13030 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*)hdest
;
13031 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*)hsrc
;
13033 ehdest
->type
= ehsrc
->type
;
13034 ehdest
->target_internal
= ehsrc
->target_internal
;
13037 /* Append a RELA relocation REL to section S in BFD. */
13040 elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13042 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13043 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
13044 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
13045 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
13048 /* Append a REL relocation REL to section S in BFD. */
13051 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13053 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13054 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
13055 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
13056 bed
->s
->swap_reloc_out (abfd
, rel
, loc
);