1 /* ELF linking support for BFD.
2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
29 #include "safe-ctype.h"
30 #include "libiberty.h"
33 /* This struct is used to pass information to routines called via
34 elf_link_hash_traverse which must return failure. */
36 struct elf_info_failed
38 struct bfd_link_info
*info
;
42 /* This structure is used to pass information to
43 _bfd_elf_link_find_version_dependencies. */
45 struct elf_find_verdep_info
47 /* General link information. */
48 struct bfd_link_info
*info
;
49 /* The number of dependencies. */
51 /* Whether we had a failure. */
55 static bfd_boolean _bfd_elf_fix_symbol_flags
56 (struct elf_link_hash_entry
*, struct elf_info_failed
*);
58 /* Define a symbol in a dynamic linkage section. */
60 struct elf_link_hash_entry
*
61 _bfd_elf_define_linkage_sym (bfd
*abfd
,
62 struct bfd_link_info
*info
,
66 struct elf_link_hash_entry
*h
;
67 struct bfd_link_hash_entry
*bh
;
68 const struct elf_backend_data
*bed
;
70 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, FALSE
);
73 /* Zap symbol defined in an as-needed lib that wasn't linked.
74 This is a symptom of a larger problem: Absolute symbols
75 defined in shared libraries can't be overridden, because we
76 lose the link to the bfd which is via the symbol section. */
77 h
->root
.type
= bfd_link_hash_new
;
81 if (!_bfd_generic_link_add_one_symbol (info
, abfd
, name
, BSF_GLOBAL
,
83 get_elf_backend_data (abfd
)->collect
,
86 h
= (struct elf_link_hash_entry
*) bh
;
90 h
->other
= (h
->other
& ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN
;
92 bed
= get_elf_backend_data (abfd
);
93 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
98 _bfd_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
102 struct elf_link_hash_entry
*h
;
103 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
104 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
106 /* This function may be called more than once. */
107 s
= bfd_get_linker_section (abfd
, ".got");
111 flags
= bed
->dynamic_sec_flags
;
113 s
= bfd_make_section_anyway_with_flags (abfd
,
114 (bed
->rela_plts_and_copies_p
115 ? ".rela.got" : ".rel.got"),
116 (bed
->dynamic_sec_flags
119 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
123 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
125 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
129 if (bed
->want_got_plt
)
131 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
133 || !bfd_set_section_alignment (abfd
, s
,
134 bed
->s
->log_file_align
))
139 /* The first bit of the global offset table is the header. */
140 s
->size
+= bed
->got_header_size
;
142 if (bed
->want_got_sym
)
144 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
145 (or .got.plt) section. We don't do this in the linker script
146 because we don't want to define the symbol if we are not creating
147 a global offset table. */
148 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
149 "_GLOBAL_OFFSET_TABLE_");
150 elf_hash_table (info
)->hgot
= h
;
158 /* Create a strtab to hold the dynamic symbol names. */
160 _bfd_elf_link_create_dynstrtab (bfd
*abfd
, struct bfd_link_info
*info
)
162 struct elf_link_hash_table
*hash_table
;
164 hash_table
= elf_hash_table (info
);
165 if (hash_table
->dynobj
== NULL
)
166 hash_table
->dynobj
= abfd
;
168 if (hash_table
->dynstr
== NULL
)
170 hash_table
->dynstr
= _bfd_elf_strtab_init ();
171 if (hash_table
->dynstr
== NULL
)
177 /* Create some sections which will be filled in with dynamic linking
178 information. ABFD is an input file which requires dynamic sections
179 to be created. The dynamic sections take up virtual memory space
180 when the final executable is run, so we need to create them before
181 addresses are assigned to the output sections. We work out the
182 actual contents and size of these sections later. */
185 _bfd_elf_link_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
189 const struct elf_backend_data
*bed
;
190 struct elf_link_hash_entry
*h
;
192 if (! is_elf_hash_table (info
->hash
))
195 if (elf_hash_table (info
)->dynamic_sections_created
)
198 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
201 abfd
= elf_hash_table (info
)->dynobj
;
202 bed
= get_elf_backend_data (abfd
);
204 flags
= bed
->dynamic_sec_flags
;
206 /* A dynamically linked executable has a .interp section, but a
207 shared library does not. */
208 if (info
->executable
)
210 s
= bfd_make_section_anyway_with_flags (abfd
, ".interp",
211 flags
| SEC_READONLY
);
216 /* Create sections to hold version informations. These are removed
217 if they are not needed. */
218 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_d",
219 flags
| SEC_READONLY
);
221 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
224 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version",
225 flags
| SEC_READONLY
);
227 || ! bfd_set_section_alignment (abfd
, s
, 1))
230 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.version_r",
231 flags
| SEC_READONLY
);
233 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
236 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynsym",
237 flags
| SEC_READONLY
);
239 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
242 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynstr",
243 flags
| SEC_READONLY
);
247 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynamic", flags
);
249 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
252 /* The special symbol _DYNAMIC is always set to the start of the
253 .dynamic section. We could set _DYNAMIC in a linker script, but we
254 only want to define it if we are, in fact, creating a .dynamic
255 section. We don't want to define it if there is no .dynamic
256 section, since on some ELF platforms the start up code examines it
257 to decide how to initialize the process. */
258 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
, "_DYNAMIC");
259 elf_hash_table (info
)->hdynamic
= h
;
265 s
= bfd_make_section_anyway_with_flags (abfd
, ".hash",
266 flags
| SEC_READONLY
);
268 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
270 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
273 if (info
->emit_gnu_hash
)
275 s
= bfd_make_section_anyway_with_flags (abfd
, ".gnu.hash",
276 flags
| SEC_READONLY
);
278 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
280 /* For 64-bit ELF, .gnu.hash is a non-uniform entity size section:
281 4 32-bit words followed by variable count of 64-bit words, then
282 variable count of 32-bit words. */
283 if (bed
->s
->arch_size
== 64)
284 elf_section_data (s
)->this_hdr
.sh_entsize
= 0;
286 elf_section_data (s
)->this_hdr
.sh_entsize
= 4;
289 /* Let the backend create the rest of the sections. This lets the
290 backend set the right flags. The backend will normally create
291 the .got and .plt sections. */
292 if (bed
->elf_backend_create_dynamic_sections
== NULL
293 || ! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
296 elf_hash_table (info
)->dynamic_sections_created
= TRUE
;
301 /* Create dynamic sections when linking against a dynamic object. */
304 _bfd_elf_create_dynamic_sections (bfd
*abfd
, struct bfd_link_info
*info
)
306 flagword flags
, pltflags
;
307 struct elf_link_hash_entry
*h
;
309 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
310 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
312 /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
313 .rel[a].bss sections. */
314 flags
= bed
->dynamic_sec_flags
;
317 if (bed
->plt_not_loaded
)
318 /* We do not clear SEC_ALLOC here because we still want the OS to
319 allocate space for the section; it's just that there's nothing
320 to read in from the object file. */
321 pltflags
&= ~ (SEC_CODE
| SEC_LOAD
| SEC_HAS_CONTENTS
);
323 pltflags
|= SEC_ALLOC
| SEC_CODE
| SEC_LOAD
;
324 if (bed
->plt_readonly
)
325 pltflags
|= SEC_READONLY
;
327 s
= bfd_make_section_anyway_with_flags (abfd
, ".plt", pltflags
);
329 || ! bfd_set_section_alignment (abfd
, s
, bed
->plt_alignment
))
333 /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
335 if (bed
->want_plt_sym
)
337 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
338 "_PROCEDURE_LINKAGE_TABLE_");
339 elf_hash_table (info
)->hplt
= h
;
344 s
= bfd_make_section_anyway_with_flags (abfd
,
345 (bed
->rela_plts_and_copies_p
346 ? ".rela.plt" : ".rel.plt"),
347 flags
| SEC_READONLY
);
349 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
353 if (! _bfd_elf_create_got_section (abfd
, info
))
356 if (bed
->want_dynbss
)
358 /* The .dynbss section is a place to put symbols which are defined
359 by dynamic objects, are referenced by regular objects, and are
360 not functions. We must allocate space for them in the process
361 image and use a R_*_COPY reloc to tell the dynamic linker to
362 initialize them at run time. The linker script puts the .dynbss
363 section into the .bss section of the final image. */
364 s
= bfd_make_section_anyway_with_flags (abfd
, ".dynbss",
365 (SEC_ALLOC
| SEC_LINKER_CREATED
));
369 /* The .rel[a].bss section holds copy relocs. This section is not
370 normally needed. We need to create it here, though, so that the
371 linker will map it to an output section. We can't just create it
372 only if we need it, because we will not know whether we need it
373 until we have seen all the input files, and the first time the
374 main linker code calls BFD after examining all the input files
375 (size_dynamic_sections) the input sections have already been
376 mapped to the output sections. If the section turns out not to
377 be needed, we can discard it later. We will never need this
378 section when generating a shared object, since they do not use
382 s
= bfd_make_section_anyway_with_flags (abfd
,
383 (bed
->rela_plts_and_copies_p
384 ? ".rela.bss" : ".rel.bss"),
385 flags
| SEC_READONLY
);
387 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
395 /* Record a new dynamic symbol. We record the dynamic symbols as we
396 read the input files, since we need to have a list of all of them
397 before we can determine the final sizes of the output sections.
398 Note that we may actually call this function even though we are not
399 going to output any dynamic symbols; in some cases we know that a
400 symbol should be in the dynamic symbol table, but only if there is
404 bfd_elf_link_record_dynamic_symbol (struct bfd_link_info
*info
,
405 struct elf_link_hash_entry
*h
)
407 if (h
->dynindx
== -1)
409 struct elf_strtab_hash
*dynstr
;
414 /* XXX: The ABI draft says the linker must turn hidden and
415 internal symbols into STB_LOCAL symbols when producing the
416 DSO. However, if ld.so honors st_other in the dynamic table,
417 this would not be necessary. */
418 switch (ELF_ST_VISIBILITY (h
->other
))
422 if (h
->root
.type
!= bfd_link_hash_undefined
423 && h
->root
.type
!= bfd_link_hash_undefweak
)
426 if (!elf_hash_table (info
)->is_relocatable_executable
)
434 h
->dynindx
= elf_hash_table (info
)->dynsymcount
;
435 ++elf_hash_table (info
)->dynsymcount
;
437 dynstr
= elf_hash_table (info
)->dynstr
;
440 /* Create a strtab to hold the dynamic symbol names. */
441 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_strtab_init ();
446 /* We don't put any version information in the dynamic string
448 name
= h
->root
.root
.string
;
449 p
= strchr (name
, ELF_VER_CHR
);
451 /* We know that the p points into writable memory. In fact,
452 there are only a few symbols that have read-only names, being
453 those like _GLOBAL_OFFSET_TABLE_ that are created specially
454 by the backends. Most symbols will have names pointing into
455 an ELF string table read from a file, or to objalloc memory. */
458 indx
= _bfd_elf_strtab_add (dynstr
, name
, p
!= NULL
);
463 if (indx
== (bfd_size_type
) -1)
465 h
->dynstr_index
= indx
;
471 /* Mark a symbol dynamic. */
474 bfd_elf_link_mark_dynamic_symbol (struct bfd_link_info
*info
,
475 struct elf_link_hash_entry
*h
,
476 Elf_Internal_Sym
*sym
)
478 struct bfd_elf_dynamic_list
*d
= info
->dynamic_list
;
480 /* It may be called more than once on the same H. */
481 if(h
->dynamic
|| info
->relocatable
)
484 if ((info
->dynamic_data
485 && (h
->type
== STT_OBJECT
487 && ELF_ST_TYPE (sym
->st_info
) == STT_OBJECT
)))
489 && h
->root
.type
== bfd_link_hash_new
490 && (*d
->match
) (&d
->head
, NULL
, h
->root
.root
.string
)))
494 /* Record an assignment to a symbol made by a linker script. We need
495 this in case some dynamic object refers to this symbol. */
498 bfd_elf_record_link_assignment (bfd
*output_bfd
,
499 struct bfd_link_info
*info
,
504 struct elf_link_hash_entry
*h
, *hv
;
505 struct elf_link_hash_table
*htab
;
506 const struct elf_backend_data
*bed
;
508 if (!is_elf_hash_table (info
->hash
))
511 htab
= elf_hash_table (info
);
512 h
= elf_link_hash_lookup (htab
, name
, !provide
, TRUE
, FALSE
);
516 switch (h
->root
.type
)
518 case bfd_link_hash_defined
:
519 case bfd_link_hash_defweak
:
520 case bfd_link_hash_common
:
522 case bfd_link_hash_undefweak
:
523 case bfd_link_hash_undefined
:
524 /* Since we're defining the symbol, don't let it seem to have not
525 been defined. record_dynamic_symbol and size_dynamic_sections
526 may depend on this. */
527 h
->root
.type
= bfd_link_hash_new
;
528 if (h
->root
.u
.undef
.next
!= NULL
|| htab
->root
.undefs_tail
== &h
->root
)
529 bfd_link_repair_undef_list (&htab
->root
);
531 case bfd_link_hash_new
:
532 bfd_elf_link_mark_dynamic_symbol (info
, h
, NULL
);
535 case bfd_link_hash_indirect
:
536 /* We had a versioned symbol in a dynamic library. We make the
537 the versioned symbol point to this one. */
538 bed
= get_elf_backend_data (output_bfd
);
540 while (hv
->root
.type
== bfd_link_hash_indirect
541 || hv
->root
.type
== bfd_link_hash_warning
)
542 hv
= (struct elf_link_hash_entry
*) hv
->root
.u
.i
.link
;
543 /* We don't need to update h->root.u since linker will set them
545 h
->root
.type
= bfd_link_hash_undefined
;
546 hv
->root
.type
= bfd_link_hash_indirect
;
547 hv
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
548 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hv
);
550 case bfd_link_hash_warning
:
555 /* If this symbol is being provided by the linker script, and it is
556 currently defined by a dynamic object, but not by a regular
557 object, then mark it as undefined so that the generic linker will
558 force the correct value. */
562 h
->root
.type
= bfd_link_hash_undefined
;
564 /* If this symbol is not being provided by the linker script, and it is
565 currently defined by a dynamic object, but not by a regular object,
566 then clear out any version information because the symbol will not be
567 associated with the dynamic object any more. */
571 h
->verinfo
.verdef
= NULL
;
577 bed
= get_elf_backend_data (output_bfd
);
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 /* Mark if a symbol has a definition in a dynamic object or is
899 weak in all dynamic objects. */
902 _bfd_elf_mark_dynamic_def_weak (struct elf_link_hash_entry
*h
,
903 asection
*sec
, int bind
)
907 if (!bfd_is_und_section (sec
))
911 /* Check if this symbol is weak in all dynamic objects. If it
912 is the first time we see it in a dynamic object, we mark
913 if it is weak. Otherwise, we clear it. */
916 if (bind
== STB_WEAK
)
919 else if (bind
!= STB_WEAK
)
925 /* This function is called when we want to define a new symbol. It
926 handles the various cases which arise when we find a definition in
927 a dynamic object, or when there is already a definition in a
928 dynamic object. The new symbol is described by NAME, SYM, PSEC,
929 and PVALUE. We set SYM_HASH to the hash table entry. We set
930 OVERRIDE if the old symbol is overriding a new definition. We set
931 TYPE_CHANGE_OK if it is OK for the type to change. We set
932 SIZE_CHANGE_OK if it is OK for the size to change. By OK to
933 change, we mean that we shouldn't warn if the type or size does
934 change. We set POLD_ALIGNMENT if an old common symbol in a dynamic
935 object is overridden by a regular object. */
938 _bfd_elf_merge_symbol (bfd
*abfd
,
939 struct bfd_link_info
*info
,
941 Elf_Internal_Sym
*sym
,
944 bfd_boolean
*pold_weak
,
945 unsigned int *pold_alignment
,
946 struct elf_link_hash_entry
**sym_hash
,
948 bfd_boolean
*override
,
949 bfd_boolean
*type_change_ok
,
950 bfd_boolean
*size_change_ok
)
952 asection
*sec
, *oldsec
;
953 struct elf_link_hash_entry
*h
;
954 struct elf_link_hash_entry
*hi
;
955 struct elf_link_hash_entry
*flip
;
958 bfd_boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
959 bfd_boolean newweak
, oldweak
, newfunc
, oldfunc
;
960 const struct elf_backend_data
*bed
;
966 bind
= ELF_ST_BIND (sym
->st_info
);
968 /* Silently discard TLS symbols from --just-syms. There's no way to
969 combine a static TLS block with a new TLS block for this executable. */
970 if (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
971 && sec
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
977 if (! bfd_is_und_section (sec
))
978 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, FALSE
, FALSE
);
980 h
= ((struct elf_link_hash_entry
*)
981 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, TRUE
, FALSE
, FALSE
));
986 bed
= get_elf_backend_data (abfd
);
988 /* This code is for coping with dynamic objects, and is only useful
989 if we are doing an ELF link. */
990 if (!(*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
993 /* For merging, we only care about real symbols. But we need to make
994 sure that indirect symbol dynamic flags are updated. */
996 while (h
->root
.type
== bfd_link_hash_indirect
997 || h
->root
.type
== bfd_link_hash_warning
)
998 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1000 /* We have to check it for every instance since the first few may be
1001 refereences and not all compilers emit symbol type for undefined
1003 bfd_elf_link_mark_dynamic_symbol (info
, h
, sym
);
1005 /* If we just created the symbol, mark it as being an ELF symbol.
1006 Other than that, there is nothing to do--there is no merge issue
1007 with a newly defined symbol--so we just return. */
1009 if (h
->root
.type
== bfd_link_hash_new
)
1015 /* OLDBFD and OLDSEC are a BFD and an ASECTION associated with the
1018 switch (h
->root
.type
)
1025 case bfd_link_hash_undefined
:
1026 case bfd_link_hash_undefweak
:
1027 oldbfd
= h
->root
.u
.undef
.abfd
;
1031 case bfd_link_hash_defined
:
1032 case bfd_link_hash_defweak
:
1033 oldbfd
= h
->root
.u
.def
.section
->owner
;
1034 oldsec
= h
->root
.u
.def
.section
;
1037 case bfd_link_hash_common
:
1038 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
1039 oldsec
= h
->root
.u
.c
.p
->section
;
1043 /* Differentiate strong and weak symbols. */
1044 newweak
= bind
== STB_WEAK
;
1045 oldweak
= (h
->root
.type
== bfd_link_hash_defweak
1046 || h
->root
.type
== bfd_link_hash_undefweak
);
1048 *pold_weak
= oldweak
;
1050 /* In cases involving weak versioned symbols, we may wind up trying
1051 to merge a symbol with itself. Catch that here, to avoid the
1052 confusion that results if we try to override a symbol with
1053 itself. The additional tests catch cases like
1054 _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
1055 dynamic object, which we do want to handle here. */
1057 && (newweak
|| oldweak
)
1058 && ((abfd
->flags
& DYNAMIC
) == 0
1059 || !h
->def_regular
))
1062 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
1063 respectively, is from a dynamic object. */
1065 newdyn
= (abfd
->flags
& DYNAMIC
) != 0;
1069 olddyn
= (oldbfd
->flags
& DYNAMIC
) != 0;
1070 else if (oldsec
!= NULL
)
1072 /* This handles the special SHN_MIPS_{TEXT,DATA} section
1073 indices used by MIPS ELF. */
1074 olddyn
= (oldsec
->symbol
->flags
& BSF_DYNAMIC
) != 0;
1077 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
1078 respectively, appear to be a definition rather than reference. */
1080 newdef
= !bfd_is_und_section (sec
) && !bfd_is_com_section (sec
);
1082 olddef
= (h
->root
.type
!= bfd_link_hash_undefined
1083 && h
->root
.type
!= bfd_link_hash_undefweak
1084 && h
->root
.type
!= bfd_link_hash_common
);
1086 /* NEWFUNC and OLDFUNC indicate whether the new or old symbol,
1087 respectively, appear to be a function. */
1089 newfunc
= (ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1090 && bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)));
1092 oldfunc
= (h
->type
!= STT_NOTYPE
1093 && bed
->is_function_type (h
->type
));
1095 /* When we try to create a default indirect symbol from the dynamic
1096 definition with the default version, we skip it if its type and
1097 the type of existing regular definition mismatch. We only do it
1098 if the existing regular definition won't be dynamic. */
1099 if (pold_alignment
== NULL
1101 && !info
->export_dynamic
1106 && (olddef
|| h
->root
.type
== bfd_link_hash_common
)
1107 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1108 && ELF_ST_TYPE (sym
->st_info
) != STT_NOTYPE
1109 && h
->type
!= STT_NOTYPE
1110 && !(newfunc
&& oldfunc
))
1116 /* Plugin symbol type isn't currently set. Stop bogus errors. */
1117 if (oldbfd
!= NULL
&& (oldbfd
->flags
& BFD_PLUGIN
) != 0)
1118 *type_change_ok
= TRUE
;
1120 /* Check TLS symbol. We don't check undefined symbol introduced by
1122 else if (oldbfd
!= NULL
1123 && ELF_ST_TYPE (sym
->st_info
) != h
->type
1124 && (ELF_ST_TYPE (sym
->st_info
) == STT_TLS
|| h
->type
== STT_TLS
))
1127 bfd_boolean ntdef
, tdef
;
1128 asection
*ntsec
, *tsec
;
1130 if (h
->type
== STT_TLS
)
1150 (*_bfd_error_handler
)
1151 (_("%s: TLS definition in %B section %A mismatches non-TLS definition in %B section %A"),
1152 tbfd
, tsec
, ntbfd
, ntsec
, h
->root
.root
.string
);
1153 else if (!tdef
&& !ntdef
)
1154 (*_bfd_error_handler
)
1155 (_("%s: TLS reference in %B mismatches non-TLS reference in %B"),
1156 tbfd
, ntbfd
, h
->root
.root
.string
);
1158 (*_bfd_error_handler
)
1159 (_("%s: TLS definition in %B section %A mismatches non-TLS reference in %B"),
1160 tbfd
, tsec
, ntbfd
, h
->root
.root
.string
);
1162 (*_bfd_error_handler
)
1163 (_("%s: TLS reference in %B mismatches non-TLS definition in %B section %A"),
1164 tbfd
, ntbfd
, ntsec
, h
->root
.root
.string
);
1166 bfd_set_error (bfd_error_bad_value
);
1170 /* We need to remember if a symbol has a definition in a dynamic
1171 object or is weak in all dynamic objects. Internal and hidden
1172 visibility will make it unavailable to dynamic objects. */
1175 _bfd_elf_mark_dynamic_def_weak (h
, sec
, bind
);
1177 _bfd_elf_mark_dynamic_def_weak (hi
, sec
, bind
);
1180 /* If the old symbol has non-default visibility, we ignore the new
1181 definition from a dynamic object. */
1183 && ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1184 && !bfd_is_und_section (sec
))
1187 /* Make sure this symbol is dynamic. */
1189 hi
->ref_dynamic
= 1;
1190 /* A protected symbol has external availability. Make sure it is
1191 recorded as dynamic.
1193 FIXME: Should we check type and size for protected symbol? */
1194 if (ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
1195 return bfd_elf_link_record_dynamic_symbol (info
, h
);
1200 && ELF_ST_VISIBILITY (sym
->st_other
) != STV_DEFAULT
1203 /* If the new symbol with non-default visibility comes from a
1204 relocatable file and the old definition comes from a dynamic
1205 object, we remove the old definition. */
1206 if ((*sym_hash
)->root
.type
== bfd_link_hash_indirect
)
1208 /* Handle the case where the old dynamic definition is
1209 default versioned. We need to copy the symbol info from
1210 the symbol with default version to the normal one if it
1211 was referenced before. */
1214 struct elf_link_hash_entry
*vh
= *sym_hash
;
1216 vh
->root
.type
= h
->root
.type
;
1217 h
->root
.type
= bfd_link_hash_indirect
;
1218 (*bed
->elf_backend_copy_indirect_symbol
) (info
, vh
, h
);
1220 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) vh
;
1221 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1223 /* If the new symbol is hidden or internal, completely undo
1224 any dynamic link state. */
1225 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1226 h
->forced_local
= 0;
1234 /* FIXME: Should we check type and size for protected symbol? */
1244 /* If the old symbol was undefined before, then it will still be
1245 on the undefs list. If the new symbol is undefined or
1246 common, we can't make it bfd_link_hash_new here, because new
1247 undefined or common symbols will be added to the undefs list
1248 by _bfd_generic_link_add_one_symbol. Symbols may not be
1249 added twice to the undefs list. Also, if the new symbol is
1250 undefweak then we don't want to lose the strong undef. */
1251 if (h
->root
.u
.undef
.next
|| info
->hash
->undefs_tail
== &h
->root
)
1253 h
->root
.type
= bfd_link_hash_undefined
;
1254 h
->root
.u
.undef
.abfd
= abfd
;
1258 h
->root
.type
= bfd_link_hash_new
;
1259 h
->root
.u
.undef
.abfd
= NULL
;
1262 if (ELF_ST_VISIBILITY (sym
->st_other
) != STV_PROTECTED
)
1264 /* If the new symbol is hidden or internal, completely undo
1265 any dynamic link state. */
1266 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1267 h
->forced_local
= 0;
1274 /* FIXME: Should we check type and size for protected symbol? */
1280 if (bind
== STB_GNU_UNIQUE
)
1281 h
->unique_global
= 1;
1283 /* If a new weak symbol definition comes from a regular file and the
1284 old symbol comes from a dynamic library, we treat the new one as
1285 strong. Similarly, an old weak symbol definition from a regular
1286 file is treated as strong when the new symbol comes from a dynamic
1287 library. Further, an old weak symbol from a dynamic library is
1288 treated as strong if the new symbol is from a dynamic library.
1289 This reflects the way glibc's ld.so works.
1291 Do this before setting *type_change_ok or *size_change_ok so that
1292 we warn properly when dynamic library symbols are overridden. */
1294 if (newdef
&& !newdyn
&& olddyn
)
1296 if (olddef
&& newdyn
)
1299 /* Allow changes between different types of function symbol. */
1300 if (newfunc
&& oldfunc
)
1301 *type_change_ok
= TRUE
;
1303 /* It's OK to change the type if either the existing symbol or the
1304 new symbol is weak. A type change is also OK if the old symbol
1305 is undefined and the new symbol is defined. */
1310 && h
->root
.type
== bfd_link_hash_undefined
))
1311 *type_change_ok
= TRUE
;
1313 /* It's OK to change the size if either the existing symbol or the
1314 new symbol is weak, or if the old symbol is undefined. */
1317 || h
->root
.type
== bfd_link_hash_undefined
)
1318 *size_change_ok
= TRUE
;
1320 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
1321 symbol, respectively, appears to be a common symbol in a dynamic
1322 object. If a symbol appears in an uninitialized section, and is
1323 not weak, and is not a function, then it may be a common symbol
1324 which was resolved when the dynamic object was created. We want
1325 to treat such symbols specially, because they raise special
1326 considerations when setting the symbol size: if the symbol
1327 appears as a common symbol in a regular object, and the size in
1328 the regular object is larger, we must make sure that we use the
1329 larger size. This problematic case can always be avoided in C,
1330 but it must be handled correctly when using Fortran shared
1333 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
1334 likewise for OLDDYNCOMMON and OLDDEF.
1336 Note that this test is just a heuristic, and that it is quite
1337 possible to have an uninitialized symbol in a shared object which
1338 is really a definition, rather than a common symbol. This could
1339 lead to some minor confusion when the symbol really is a common
1340 symbol in some regular object. However, I think it will be
1346 && (sec
->flags
& SEC_ALLOC
) != 0
1347 && (sec
->flags
& SEC_LOAD
) == 0
1350 newdyncommon
= TRUE
;
1352 newdyncommon
= FALSE
;
1356 && h
->root
.type
== bfd_link_hash_defined
1358 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
1359 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
1362 olddyncommon
= TRUE
;
1364 olddyncommon
= FALSE
;
1366 /* We now know everything about the old and new symbols. We ask the
1367 backend to check if we can merge them. */
1368 if (bed
->merge_symbol
1369 && !bed
->merge_symbol (info
, sym_hash
, h
, sym
, psec
, pvalue
,
1370 pold_alignment
, skip
, override
,
1371 type_change_ok
, size_change_ok
,
1372 &newdyn
, &newdef
, &newdyncommon
, &newweak
,
1374 &olddyn
, &olddef
, &olddyncommon
, &oldweak
,
1378 /* If both the old and the new symbols look like common symbols in a
1379 dynamic object, set the size of the symbol to the larger of the
1384 && sym
->st_size
!= h
->size
)
1386 /* Since we think we have two common symbols, issue a multiple
1387 common warning if desired. Note that we only warn if the
1388 size is different. If the size is the same, we simply let
1389 the old symbol override the new one as normally happens with
1390 symbols defined in dynamic objects. */
1392 if (! ((*info
->callbacks
->multiple_common
)
1393 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1396 if (sym
->st_size
> h
->size
)
1397 h
->size
= sym
->st_size
;
1399 *size_change_ok
= TRUE
;
1402 /* If we are looking at a dynamic object, and we have found a
1403 definition, we need to see if the symbol was already defined by
1404 some other object. If so, we want to use the existing
1405 definition, and we do not want to report a multiple symbol
1406 definition error; we do this by clobbering *PSEC to be
1407 bfd_und_section_ptr.
1409 We treat a common symbol as a definition if the symbol in the
1410 shared library is a function, since common symbols always
1411 represent variables; this can cause confusion in principle, but
1412 any such confusion would seem to indicate an erroneous program or
1413 shared library. We also permit a common symbol in a regular
1414 object to override a weak symbol in a shared object. */
1419 || (h
->root
.type
== bfd_link_hash_common
1420 && (newweak
|| newfunc
))))
1424 newdyncommon
= FALSE
;
1426 *psec
= sec
= bfd_und_section_ptr
;
1427 *size_change_ok
= TRUE
;
1429 /* If we get here when the old symbol is a common symbol, then
1430 we are explicitly letting it override a weak symbol or
1431 function in a dynamic object, and we don't want to warn about
1432 a type change. If the old symbol is a defined symbol, a type
1433 change warning may still be appropriate. */
1435 if (h
->root
.type
== bfd_link_hash_common
)
1436 *type_change_ok
= TRUE
;
1439 /* Handle the special case of an old common symbol merging with a
1440 new symbol which looks like a common symbol in a shared object.
1441 We change *PSEC and *PVALUE to make the new symbol look like a
1442 common symbol, and let _bfd_generic_link_add_one_symbol do the
1446 && h
->root
.type
== bfd_link_hash_common
)
1450 newdyncommon
= FALSE
;
1451 *pvalue
= sym
->st_size
;
1452 *psec
= sec
= bed
->common_section (oldsec
);
1453 *size_change_ok
= TRUE
;
1456 /* Skip weak definitions of symbols that are already defined. */
1457 if (newdef
&& olddef
&& newweak
)
1459 /* Don't skip new non-IR weak syms. */
1460 if (!(oldbfd
!= NULL
1461 && (oldbfd
->flags
& BFD_PLUGIN
) != 0
1462 && (abfd
->flags
& BFD_PLUGIN
) == 0))
1465 /* Merge st_other. If the symbol already has a dynamic index,
1466 but visibility says it should not be visible, turn it into a
1468 elf_merge_st_other (abfd
, h
, sym
, newdef
, newdyn
);
1469 if (h
->dynindx
!= -1)
1470 switch (ELF_ST_VISIBILITY (h
->other
))
1474 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1479 /* If the old symbol is from a dynamic object, and the new symbol is
1480 a definition which is not from a dynamic object, then the new
1481 symbol overrides the old symbol. Symbols from regular files
1482 always take precedence over symbols from dynamic objects, even if
1483 they are defined after the dynamic object in the link.
1485 As above, we again permit a common symbol in a regular object to
1486 override a definition in a shared object if the shared object
1487 symbol is a function or is weak. */
1492 || (bfd_is_com_section (sec
)
1493 && (oldweak
|| oldfunc
)))
1498 /* Change the hash table entry to undefined, and let
1499 _bfd_generic_link_add_one_symbol do the right thing with the
1502 h
->root
.type
= bfd_link_hash_undefined
;
1503 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1504 *size_change_ok
= TRUE
;
1507 olddyncommon
= FALSE
;
1509 /* We again permit a type change when a common symbol may be
1510 overriding a function. */
1512 if (bfd_is_com_section (sec
))
1516 /* If a common symbol overrides a function, make sure
1517 that it isn't defined dynamically nor has type
1520 h
->type
= STT_NOTYPE
;
1522 *type_change_ok
= TRUE
;
1525 if ((*sym_hash
)->root
.type
== bfd_link_hash_indirect
)
1528 /* This union may have been set to be non-NULL when this symbol
1529 was seen in a dynamic object. We must force the union to be
1530 NULL, so that it is correct for a regular symbol. */
1531 h
->verinfo
.vertree
= NULL
;
1534 /* Handle the special case of a new common symbol merging with an
1535 old symbol that looks like it might be a common symbol defined in
1536 a shared object. Note that we have already handled the case in
1537 which a new common symbol should simply override the definition
1538 in the shared library. */
1541 && bfd_is_com_section (sec
)
1544 /* It would be best if we could set the hash table entry to a
1545 common symbol, but we don't know what to use for the section
1546 or the alignment. */
1547 if (! ((*info
->callbacks
->multiple_common
)
1548 (info
, &h
->root
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
1551 /* If the presumed common symbol in the dynamic object is
1552 larger, pretend that the new symbol has its size. */
1554 if (h
->size
> *pvalue
)
1557 /* We need to remember the alignment required by the symbol
1558 in the dynamic object. */
1559 BFD_ASSERT (pold_alignment
);
1560 *pold_alignment
= h
->root
.u
.def
.section
->alignment_power
;
1563 olddyncommon
= FALSE
;
1565 h
->root
.type
= bfd_link_hash_undefined
;
1566 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
1568 *size_change_ok
= TRUE
;
1569 *type_change_ok
= TRUE
;
1571 if ((*sym_hash
)->root
.type
== bfd_link_hash_indirect
)
1574 h
->verinfo
.vertree
= NULL
;
1579 /* Handle the case where we had a versioned symbol in a dynamic
1580 library and now find a definition in a normal object. In this
1581 case, we make the versioned symbol point to the normal one. */
1582 flip
->root
.type
= h
->root
.type
;
1583 flip
->root
.u
.undef
.abfd
= h
->root
.u
.undef
.abfd
;
1584 h
->root
.type
= bfd_link_hash_indirect
;
1585 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) flip
;
1586 (*bed
->elf_backend_copy_indirect_symbol
) (info
, flip
, h
);
1590 flip
->ref_dynamic
= 1;
1597 /* This function is called to create an indirect symbol from the
1598 default for the symbol with the default version if needed. The
1599 symbol is described by H, NAME, SYM, PSEC, VALUE, and OVERRIDE. We
1600 set DYNSYM if the new indirect symbol is dynamic. */
1603 _bfd_elf_add_default_symbol (bfd
*abfd
,
1604 struct bfd_link_info
*info
,
1605 struct elf_link_hash_entry
*h
,
1607 Elf_Internal_Sym
*sym
,
1610 bfd_boolean
*dynsym
,
1611 bfd_boolean override
)
1613 bfd_boolean type_change_ok
;
1614 bfd_boolean size_change_ok
;
1617 struct elf_link_hash_entry
*hi
;
1618 struct bfd_link_hash_entry
*bh
;
1619 const struct elf_backend_data
*bed
;
1620 bfd_boolean collect
;
1621 bfd_boolean dynamic
;
1623 size_t len
, shortlen
;
1626 /* If this symbol has a version, and it is the default version, we
1627 create an indirect symbol from the default name to the fully
1628 decorated name. This will cause external references which do not
1629 specify a version to be bound to this version of the symbol. */
1630 p
= strchr (name
, ELF_VER_CHR
);
1631 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
1636 /* We are overridden by an old definition. We need to check if we
1637 need to create the indirect symbol from the default name. */
1638 hi
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
,
1640 BFD_ASSERT (hi
!= NULL
);
1643 while (hi
->root
.type
== bfd_link_hash_indirect
1644 || hi
->root
.type
== bfd_link_hash_warning
)
1646 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1652 bed
= get_elf_backend_data (abfd
);
1653 collect
= bed
->collect
;
1654 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
1656 shortlen
= p
- name
;
1657 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
1658 if (shortname
== NULL
)
1660 memcpy (shortname
, name
, shortlen
);
1661 shortname
[shortlen
] = '\0';
1663 /* We are going to create a new symbol. Merge it with any existing
1664 symbol with this name. For the purposes of the merge, act as
1665 though we were defining the symbol we just defined, although we
1666 actually going to define an indirect symbol. */
1667 type_change_ok
= FALSE
;
1668 size_change_ok
= FALSE
;
1670 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &sec
, value
,
1671 NULL
, NULL
, &hi
, &skip
, &override
,
1672 &type_change_ok
, &size_change_ok
))
1681 if (! (_bfd_generic_link_add_one_symbol
1682 (info
, abfd
, shortname
, BSF_INDIRECT
, bfd_ind_section_ptr
,
1683 0, name
, FALSE
, collect
, &bh
)))
1685 hi
= (struct elf_link_hash_entry
*) bh
;
1689 /* In this case the symbol named SHORTNAME is overriding the
1690 indirect symbol we want to add. We were planning on making
1691 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
1692 is the name without a version. NAME is the fully versioned
1693 name, and it is the default version.
1695 Overriding means that we already saw a definition for the
1696 symbol SHORTNAME in a regular object, and it is overriding
1697 the symbol defined in the dynamic object.
1699 When this happens, we actually want to change NAME, the
1700 symbol we just added, to refer to SHORTNAME. This will cause
1701 references to NAME in the shared object to become references
1702 to SHORTNAME in the regular object. This is what we expect
1703 when we override a function in a shared object: that the
1704 references in the shared object will be mapped to the
1705 definition in the regular object. */
1707 while (hi
->root
.type
== bfd_link_hash_indirect
1708 || hi
->root
.type
== bfd_link_hash_warning
)
1709 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1711 h
->root
.type
= bfd_link_hash_indirect
;
1712 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1716 hi
->ref_dynamic
= 1;
1720 if (! bfd_elf_link_record_dynamic_symbol (info
, hi
))
1725 /* Now set HI to H, so that the following code will set the
1726 other fields correctly. */
1730 /* Check if HI is a warning symbol. */
1731 if (hi
->root
.type
== bfd_link_hash_warning
)
1732 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1734 /* If there is a duplicate definition somewhere, then HI may not
1735 point to an indirect symbol. We will have reported an error to
1736 the user in that case. */
1738 if (hi
->root
.type
== bfd_link_hash_indirect
)
1740 struct elf_link_hash_entry
*ht
;
1742 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1743 (*bed
->elf_backend_copy_indirect_symbol
) (info
, ht
, hi
);
1745 /* See if the new flags lead us to realize that the symbol must
1751 if (! info
->executable
1758 if (hi
->ref_regular
)
1764 /* We also need to define an indirection from the nondefault version
1768 len
= strlen (name
);
1769 shortname
= (char *) bfd_hash_allocate (&info
->hash
->table
, len
);
1770 if (shortname
== NULL
)
1772 memcpy (shortname
, name
, shortlen
);
1773 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
1775 /* Once again, merge with any existing symbol. */
1776 type_change_ok
= FALSE
;
1777 size_change_ok
= FALSE
;
1779 if (!_bfd_elf_merge_symbol (abfd
, info
, shortname
, sym
, &sec
, value
,
1780 NULL
, NULL
, &hi
, &skip
, &override
,
1781 &type_change_ok
, &size_change_ok
))
1789 /* Here SHORTNAME is a versioned name, so we don't expect to see
1790 the type of override we do in the case above unless it is
1791 overridden by a versioned definition. */
1792 if (hi
->root
.type
!= bfd_link_hash_defined
1793 && hi
->root
.type
!= bfd_link_hash_defweak
)
1794 (*_bfd_error_handler
)
1795 (_("%B: unexpected redefinition of indirect versioned symbol `%s'"),
1801 if (! (_bfd_generic_link_add_one_symbol
1802 (info
, abfd
, shortname
, BSF_INDIRECT
,
1803 bfd_ind_section_ptr
, 0, name
, FALSE
, collect
, &bh
)))
1805 hi
= (struct elf_link_hash_entry
*) bh
;
1807 /* If there is a duplicate definition somewhere, then HI may not
1808 point to an indirect symbol. We will have reported an error
1809 to the user in that case. */
1811 if (hi
->root
.type
== bfd_link_hash_indirect
)
1813 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
1815 /* See if the new flags lead us to realize that the symbol
1821 if (! info
->executable
1827 if (hi
->ref_regular
)
1837 /* This routine is used to export all defined symbols into the dynamic
1838 symbol table. It is called via elf_link_hash_traverse. */
1841 _bfd_elf_export_symbol (struct elf_link_hash_entry
*h
, void *data
)
1843 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
1845 /* Ignore indirect symbols. These are added by the versioning code. */
1846 if (h
->root
.type
== bfd_link_hash_indirect
)
1849 /* Ignore this if we won't export it. */
1850 if (!eif
->info
->export_dynamic
&& !h
->dynamic
)
1853 if (h
->dynindx
== -1
1854 && (h
->def_regular
|| h
->ref_regular
)
1855 && ! bfd_hide_sym_by_version (eif
->info
->version_info
,
1856 h
->root
.root
.string
))
1858 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
1868 /* Look through the symbols which are defined in other shared
1869 libraries and referenced here. Update the list of version
1870 dependencies. This will be put into the .gnu.version_r section.
1871 This function is called via elf_link_hash_traverse. */
1874 _bfd_elf_link_find_version_dependencies (struct elf_link_hash_entry
*h
,
1877 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
1878 Elf_Internal_Verneed
*t
;
1879 Elf_Internal_Vernaux
*a
;
1882 /* We only care about symbols defined in shared objects with version
1887 || h
->verinfo
.verdef
== NULL
)
1890 /* See if we already know about this version. */
1891 for (t
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1895 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
1898 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1899 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
1905 /* This is a new version. Add it to tree we are building. */
1910 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1913 rinfo
->failed
= TRUE
;
1917 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
1918 t
->vn_nextref
= elf_tdata (rinfo
->info
->output_bfd
)->verref
;
1919 elf_tdata (rinfo
->info
->output_bfd
)->verref
= t
;
1923 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->info
->output_bfd
, amt
);
1926 rinfo
->failed
= TRUE
;
1930 /* Note that we are copying a string pointer here, and testing it
1931 above. If bfd_elf_string_from_elf_section is ever changed to
1932 discard the string data when low in memory, this will have to be
1934 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
1936 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
1937 a
->vna_nextptr
= t
->vn_auxptr
;
1939 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
1942 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
1949 /* Figure out appropriate versions for all the symbols. We may not
1950 have the version number script until we have read all of the input
1951 files, so until that point we don't know which symbols should be
1952 local. This function is called via elf_link_hash_traverse. */
1955 _bfd_elf_link_assign_sym_version (struct elf_link_hash_entry
*h
, void *data
)
1957 struct elf_info_failed
*sinfo
;
1958 struct bfd_link_info
*info
;
1959 const struct elf_backend_data
*bed
;
1960 struct elf_info_failed eif
;
1964 sinfo
= (struct elf_info_failed
*) data
;
1967 /* Fix the symbol flags. */
1970 if (! _bfd_elf_fix_symbol_flags (h
, &eif
))
1973 sinfo
->failed
= TRUE
;
1977 /* We only need version numbers for symbols defined in regular
1979 if (!h
->def_regular
)
1982 bed
= get_elf_backend_data (info
->output_bfd
);
1983 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
1984 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
1986 struct bfd_elf_version_tree
*t
;
1991 /* There are two consecutive ELF_VER_CHR characters if this is
1992 not a hidden symbol. */
1994 if (*p
== ELF_VER_CHR
)
2000 /* If there is no version string, we can just return out. */
2008 /* Look for the version. If we find it, it is no longer weak. */
2009 for (t
= sinfo
->info
->version_info
; t
!= NULL
; t
= t
->next
)
2011 if (strcmp (t
->name
, p
) == 0)
2015 struct bfd_elf_version_expr
*d
;
2017 len
= p
- h
->root
.root
.string
;
2018 alc
= (char *) bfd_malloc (len
);
2021 sinfo
->failed
= TRUE
;
2024 memcpy (alc
, h
->root
.root
.string
, len
- 1);
2025 alc
[len
- 1] = '\0';
2026 if (alc
[len
- 2] == ELF_VER_CHR
)
2027 alc
[len
- 2] = '\0';
2029 h
->verinfo
.vertree
= t
;
2033 if (t
->globals
.list
!= NULL
)
2034 d
= (*t
->match
) (&t
->globals
, NULL
, alc
);
2036 /* See if there is anything to force this symbol to
2038 if (d
== NULL
&& t
->locals
.list
!= NULL
)
2040 d
= (*t
->match
) (&t
->locals
, NULL
, alc
);
2043 && ! info
->export_dynamic
)
2044 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2052 /* If we are building an application, we need to create a
2053 version node for this version. */
2054 if (t
== NULL
&& info
->executable
)
2056 struct bfd_elf_version_tree
**pp
;
2059 /* If we aren't going to export this symbol, we don't need
2060 to worry about it. */
2061 if (h
->dynindx
== -1)
2065 t
= (struct bfd_elf_version_tree
*) bfd_zalloc (info
->output_bfd
, amt
);
2068 sinfo
->failed
= TRUE
;
2073 t
->name_indx
= (unsigned int) -1;
2077 /* Don't count anonymous version tag. */
2078 if (sinfo
->info
->version_info
!= NULL
2079 && sinfo
->info
->version_info
->vernum
== 0)
2081 for (pp
= &sinfo
->info
->version_info
;
2085 t
->vernum
= version_index
;
2089 h
->verinfo
.vertree
= t
;
2093 /* We could not find the version for a symbol when
2094 generating a shared archive. Return an error. */
2095 (*_bfd_error_handler
)
2096 (_("%B: version node not found for symbol %s"),
2097 info
->output_bfd
, h
->root
.root
.string
);
2098 bfd_set_error (bfd_error_bad_value
);
2099 sinfo
->failed
= TRUE
;
2107 /* If we don't have a version for this symbol, see if we can find
2109 if (h
->verinfo
.vertree
== NULL
&& sinfo
->info
->version_info
!= NULL
)
2114 = bfd_find_version_for_sym (sinfo
->info
->version_info
,
2115 h
->root
.root
.string
, &hide
);
2116 if (h
->verinfo
.vertree
!= NULL
&& hide
)
2117 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2123 /* Read and swap the relocs from the section indicated by SHDR. This
2124 may be either a REL or a RELA section. The relocations are
2125 translated into RELA relocations and stored in INTERNAL_RELOCS,
2126 which should have already been allocated to contain enough space.
2127 The EXTERNAL_RELOCS are a buffer where the external form of the
2128 relocations should be stored.
2130 Returns FALSE if something goes wrong. */
2133 elf_link_read_relocs_from_section (bfd
*abfd
,
2135 Elf_Internal_Shdr
*shdr
,
2136 void *external_relocs
,
2137 Elf_Internal_Rela
*internal_relocs
)
2139 const struct elf_backend_data
*bed
;
2140 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2141 const bfd_byte
*erela
;
2142 const bfd_byte
*erelaend
;
2143 Elf_Internal_Rela
*irela
;
2144 Elf_Internal_Shdr
*symtab_hdr
;
2147 /* Position ourselves at the start of the section. */
2148 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2151 /* Read the relocations. */
2152 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2155 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2156 nsyms
= NUM_SHDR_ENTRIES (symtab_hdr
);
2158 bed
= get_elf_backend_data (abfd
);
2160 /* Convert the external relocations to the internal format. */
2161 if (shdr
->sh_entsize
== bed
->s
->sizeof_rel
)
2162 swap_in
= bed
->s
->swap_reloc_in
;
2163 else if (shdr
->sh_entsize
== bed
->s
->sizeof_rela
)
2164 swap_in
= bed
->s
->swap_reloca_in
;
2167 bfd_set_error (bfd_error_wrong_format
);
2171 erela
= (const bfd_byte
*) external_relocs
;
2172 erelaend
= erela
+ shdr
->sh_size
;
2173 irela
= internal_relocs
;
2174 while (erela
< erelaend
)
2178 (*swap_in
) (abfd
, erela
, irela
);
2179 r_symndx
= ELF32_R_SYM (irela
->r_info
);
2180 if (bed
->s
->arch_size
== 64)
2184 if ((size_t) r_symndx
>= nsyms
)
2186 (*_bfd_error_handler
)
2187 (_("%B: bad reloc symbol index (0x%lx >= 0x%lx)"
2188 " for offset 0x%lx in section `%A'"),
2190 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2191 bfd_set_error (bfd_error_bad_value
);
2195 else if (r_symndx
!= STN_UNDEF
)
2197 (*_bfd_error_handler
)
2198 (_("%B: non-zero symbol index (0x%lx) for offset 0x%lx in section `%A'"
2199 " when the object file has no symbol table"),
2201 (unsigned long) r_symndx
, (unsigned long) nsyms
, irela
->r_offset
);
2202 bfd_set_error (bfd_error_bad_value
);
2205 irela
+= bed
->s
->int_rels_per_ext_rel
;
2206 erela
+= shdr
->sh_entsize
;
2212 /* Read and swap the relocs for a section O. They may have been
2213 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2214 not NULL, they are used as buffers to read into. They are known to
2215 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2216 the return value is allocated using either malloc or bfd_alloc,
2217 according to the KEEP_MEMORY argument. If O has two relocation
2218 sections (both REL and RELA relocations), then the REL_HDR
2219 relocations will appear first in INTERNAL_RELOCS, followed by the
2220 RELA_HDR relocations. */
2223 _bfd_elf_link_read_relocs (bfd
*abfd
,
2225 void *external_relocs
,
2226 Elf_Internal_Rela
*internal_relocs
,
2227 bfd_boolean keep_memory
)
2229 void *alloc1
= NULL
;
2230 Elf_Internal_Rela
*alloc2
= NULL
;
2231 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2232 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
2233 Elf_Internal_Rela
*internal_rela_relocs
;
2235 if (esdo
->relocs
!= NULL
)
2236 return esdo
->relocs
;
2238 if (o
->reloc_count
== 0)
2241 if (internal_relocs
== NULL
)
2245 size
= o
->reloc_count
;
2246 size
*= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
2248 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2250 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2251 if (internal_relocs
== NULL
)
2255 if (external_relocs
== NULL
)
2257 bfd_size_type size
= 0;
2260 size
+= esdo
->rel
.hdr
->sh_size
;
2262 size
+= esdo
->rela
.hdr
->sh_size
;
2264 alloc1
= bfd_malloc (size
);
2267 external_relocs
= alloc1
;
2270 internal_rela_relocs
= internal_relocs
;
2273 if (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rel
.hdr
,
2277 external_relocs
= (((bfd_byte
*) external_relocs
)
2278 + esdo
->rel
.hdr
->sh_size
);
2279 internal_rela_relocs
+= (NUM_SHDR_ENTRIES (esdo
->rel
.hdr
)
2280 * bed
->s
->int_rels_per_ext_rel
);
2284 && (!elf_link_read_relocs_from_section (abfd
, o
, esdo
->rela
.hdr
,
2286 internal_rela_relocs
)))
2289 /* Cache the results for next time, if we can. */
2291 esdo
->relocs
= internal_relocs
;
2296 /* Don't free alloc2, since if it was allocated we are passing it
2297 back (under the name of internal_relocs). */
2299 return internal_relocs
;
2307 bfd_release (abfd
, alloc2
);
2314 /* Compute the size of, and allocate space for, REL_HDR which is the
2315 section header for a section containing relocations for O. */
2318 _bfd_elf_link_size_reloc_section (bfd
*abfd
,
2319 struct bfd_elf_section_reloc_data
*reldata
)
2321 Elf_Internal_Shdr
*rel_hdr
= reldata
->hdr
;
2323 /* That allows us to calculate the size of the section. */
2324 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reldata
->count
;
2326 /* The contents field must last into write_object_contents, so we
2327 allocate it with bfd_alloc rather than malloc. Also since we
2328 cannot be sure that the contents will actually be filled in,
2329 we zero the allocated space. */
2330 rel_hdr
->contents
= (unsigned char *) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
2331 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
2334 if (reldata
->hashes
== NULL
&& reldata
->count
)
2336 struct elf_link_hash_entry
**p
;
2338 p
= (struct elf_link_hash_entry
**)
2339 bfd_zmalloc (reldata
->count
* sizeof (struct elf_link_hash_entry
*));
2343 reldata
->hashes
= p
;
2349 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
2350 originated from the section given by INPUT_REL_HDR) to the
2354 _bfd_elf_link_output_relocs (bfd
*output_bfd
,
2355 asection
*input_section
,
2356 Elf_Internal_Shdr
*input_rel_hdr
,
2357 Elf_Internal_Rela
*internal_relocs
,
2358 struct elf_link_hash_entry
**rel_hash
2361 Elf_Internal_Rela
*irela
;
2362 Elf_Internal_Rela
*irelaend
;
2364 struct bfd_elf_section_reloc_data
*output_reldata
;
2365 asection
*output_section
;
2366 const struct elf_backend_data
*bed
;
2367 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2368 struct bfd_elf_section_data
*esdo
;
2370 output_section
= input_section
->output_section
;
2372 bed
= get_elf_backend_data (output_bfd
);
2373 esdo
= elf_section_data (output_section
);
2374 if (esdo
->rel
.hdr
&& esdo
->rel
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2376 output_reldata
= &esdo
->rel
;
2377 swap_out
= bed
->s
->swap_reloc_out
;
2379 else if (esdo
->rela
.hdr
2380 && esdo
->rela
.hdr
->sh_entsize
== input_rel_hdr
->sh_entsize
)
2382 output_reldata
= &esdo
->rela
;
2383 swap_out
= bed
->s
->swap_reloca_out
;
2387 (*_bfd_error_handler
)
2388 (_("%B: relocation size mismatch in %B section %A"),
2389 output_bfd
, input_section
->owner
, input_section
);
2390 bfd_set_error (bfd_error_wrong_format
);
2394 erel
= output_reldata
->hdr
->contents
;
2395 erel
+= output_reldata
->count
* input_rel_hdr
->sh_entsize
;
2396 irela
= internal_relocs
;
2397 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
2398 * bed
->s
->int_rels_per_ext_rel
);
2399 while (irela
< irelaend
)
2401 (*swap_out
) (output_bfd
, irela
, erel
);
2402 irela
+= bed
->s
->int_rels_per_ext_rel
;
2403 erel
+= input_rel_hdr
->sh_entsize
;
2406 /* Bump the counter, so that we know where to add the next set of
2408 output_reldata
->count
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
2413 /* Make weak undefined symbols in PIE dynamic. */
2416 _bfd_elf_link_hash_fixup_symbol (struct bfd_link_info
*info
,
2417 struct elf_link_hash_entry
*h
)
2421 && h
->root
.type
== bfd_link_hash_undefweak
)
2422 return bfd_elf_link_record_dynamic_symbol (info
, h
);
2427 /* Fix up the flags for a symbol. This handles various cases which
2428 can only be fixed after all the input files are seen. This is
2429 currently called by both adjust_dynamic_symbol and
2430 assign_sym_version, which is unnecessary but perhaps more robust in
2431 the face of future changes. */
2434 _bfd_elf_fix_symbol_flags (struct elf_link_hash_entry
*h
,
2435 struct elf_info_failed
*eif
)
2437 const struct elf_backend_data
*bed
;
2439 /* If this symbol was mentioned in a non-ELF file, try to set
2440 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2441 permit a non-ELF file to correctly refer to a symbol defined in
2442 an ELF dynamic object. */
2445 while (h
->root
.type
== bfd_link_hash_indirect
)
2446 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2448 if (h
->root
.type
!= bfd_link_hash_defined
2449 && h
->root
.type
!= bfd_link_hash_defweak
)
2452 h
->ref_regular_nonweak
= 1;
2456 if (h
->root
.u
.def
.section
->owner
!= NULL
2457 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2458 == bfd_target_elf_flavour
))
2461 h
->ref_regular_nonweak
= 1;
2467 if (h
->dynindx
== -1
2471 if (! bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2480 /* Unfortunately, NON_ELF is only correct if the symbol
2481 was first seen in a non-ELF file. Fortunately, if the symbol
2482 was first seen in an ELF file, we're probably OK unless the
2483 symbol was defined in a non-ELF file. Catch that case here.
2484 FIXME: We're still in trouble if the symbol was first seen in
2485 a dynamic object, and then later in a non-ELF regular object. */
2486 if ((h
->root
.type
== bfd_link_hash_defined
2487 || h
->root
.type
== bfd_link_hash_defweak
)
2489 && (h
->root
.u
.def
.section
->owner
!= NULL
2490 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2491 != bfd_target_elf_flavour
)
2492 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
2493 && !h
->def_dynamic
)))
2497 /* Backend specific symbol fixup. */
2498 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
2499 if (bed
->elf_backend_fixup_symbol
2500 && !(*bed
->elf_backend_fixup_symbol
) (eif
->info
, h
))
2503 /* If this is a final link, and the symbol was defined as a common
2504 symbol in a regular object file, and there was no definition in
2505 any dynamic object, then the linker will have allocated space for
2506 the symbol in a common section but the DEF_REGULAR
2507 flag will not have been set. */
2508 if (h
->root
.type
== bfd_link_hash_defined
2512 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
2515 /* If -Bsymbolic was used (which means to bind references to global
2516 symbols to the definition within the shared object), and this
2517 symbol was defined in a regular object, then it actually doesn't
2518 need a PLT entry. Likewise, if the symbol has non-default
2519 visibility. If the symbol has hidden or internal visibility, we
2520 will force it local. */
2522 && eif
->info
->shared
2523 && is_elf_hash_table (eif
->info
->hash
)
2524 && (SYMBOLIC_BIND (eif
->info
, h
)
2525 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2528 bfd_boolean force_local
;
2530 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
2531 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
2532 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
2535 /* If a weak undefined symbol has non-default visibility, we also
2536 hide it from the dynamic linker. */
2537 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2538 && h
->root
.type
== bfd_link_hash_undefweak
)
2539 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, TRUE
);
2541 /* If this is a weak defined symbol in a dynamic object, and we know
2542 the real definition in the dynamic object, copy interesting flags
2543 over to the real definition. */
2544 if (h
->u
.weakdef
!= NULL
)
2546 /* If the real definition is defined by a regular object file,
2547 don't do anything special. See the longer description in
2548 _bfd_elf_adjust_dynamic_symbol, below. */
2549 if (h
->u
.weakdef
->def_regular
)
2550 h
->u
.weakdef
= NULL
;
2553 struct elf_link_hash_entry
*weakdef
= h
->u
.weakdef
;
2555 while (h
->root
.type
== bfd_link_hash_indirect
)
2556 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2558 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
2559 || h
->root
.type
== bfd_link_hash_defweak
);
2560 BFD_ASSERT (weakdef
->def_dynamic
);
2561 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
2562 || weakdef
->root
.type
== bfd_link_hash_defweak
);
2563 (*bed
->elf_backend_copy_indirect_symbol
) (eif
->info
, weakdef
, h
);
2570 /* Make the backend pick a good value for a dynamic symbol. This is
2571 called via elf_link_hash_traverse, and also calls itself
2575 _bfd_elf_adjust_dynamic_symbol (struct elf_link_hash_entry
*h
, void *data
)
2577 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
2579 const struct elf_backend_data
*bed
;
2581 if (! is_elf_hash_table (eif
->info
->hash
))
2584 /* Ignore indirect symbols. These are added by the versioning code. */
2585 if (h
->root
.type
== bfd_link_hash_indirect
)
2588 /* Fix the symbol flags. */
2589 if (! _bfd_elf_fix_symbol_flags (h
, eif
))
2592 /* If this symbol does not require a PLT entry, and it is not
2593 defined by a dynamic object, or is not referenced by a regular
2594 object, ignore it. We do have to handle a weak defined symbol,
2595 even if no regular object refers to it, if we decided to add it
2596 to the dynamic symbol table. FIXME: Do we normally need to worry
2597 about symbols which are defined by one dynamic object and
2598 referenced by another one? */
2600 && h
->type
!= STT_GNU_IFUNC
2604 && (h
->u
.weakdef
== NULL
|| h
->u
.weakdef
->dynindx
== -1))))
2606 h
->plt
= elf_hash_table (eif
->info
)->init_plt_offset
;
2610 /* If we've already adjusted this symbol, don't do it again. This
2611 can happen via a recursive call. */
2612 if (h
->dynamic_adjusted
)
2615 /* Don't look at this symbol again. Note that we must set this
2616 after checking the above conditions, because we may look at a
2617 symbol once, decide not to do anything, and then get called
2618 recursively later after REF_REGULAR is set below. */
2619 h
->dynamic_adjusted
= 1;
2621 /* If this is a weak definition, and we know a real definition, and
2622 the real symbol is not itself defined by a regular object file,
2623 then get a good value for the real definition. We handle the
2624 real symbol first, for the convenience of the backend routine.
2626 Note that there is a confusing case here. If the real definition
2627 is defined by a regular object file, we don't get the real symbol
2628 from the dynamic object, but we do get the weak symbol. If the
2629 processor backend uses a COPY reloc, then if some routine in the
2630 dynamic object changes the real symbol, we will not see that
2631 change in the corresponding weak symbol. This is the way other
2632 ELF linkers work as well, and seems to be a result of the shared
2635 I will clarify this issue. Most SVR4 shared libraries define the
2636 variable _timezone and define timezone as a weak synonym. The
2637 tzset call changes _timezone. If you write
2638 extern int timezone;
2640 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
2641 you might expect that, since timezone is a synonym for _timezone,
2642 the same number will print both times. However, if the processor
2643 backend uses a COPY reloc, then actually timezone will be copied
2644 into your process image, and, since you define _timezone
2645 yourself, _timezone will not. Thus timezone and _timezone will
2646 wind up at different memory locations. The tzset call will set
2647 _timezone, leaving timezone unchanged. */
2649 if (h
->u
.weakdef
!= NULL
)
2651 /* If we get to this point, there is an implicit reference to
2652 H->U.WEAKDEF by a regular object file via the weak symbol H. */
2653 h
->u
.weakdef
->ref_regular
= 1;
2655 /* Ensure that the backend adjust_dynamic_symbol function sees
2656 H->U.WEAKDEF before H by recursively calling ourselves. */
2657 if (! _bfd_elf_adjust_dynamic_symbol (h
->u
.weakdef
, eif
))
2661 /* If a symbol has no type and no size and does not require a PLT
2662 entry, then we are probably about to do the wrong thing here: we
2663 are probably going to create a COPY reloc for an empty object.
2664 This case can arise when a shared object is built with assembly
2665 code, and the assembly code fails to set the symbol type. */
2667 && h
->type
== STT_NOTYPE
2669 (*_bfd_error_handler
)
2670 (_("warning: type and size of dynamic symbol `%s' are not defined"),
2671 h
->root
.root
.string
);
2673 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
2674 bed
= get_elf_backend_data (dynobj
);
2676 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
2685 /* Adjust the dynamic symbol, H, for copy in the dynamic bss section,
2689 _bfd_elf_adjust_dynamic_copy (struct elf_link_hash_entry
*h
,
2692 unsigned int power_of_two
;
2694 asection
*sec
= h
->root
.u
.def
.section
;
2696 /* The section aligment of definition is the maximum alignment
2697 requirement of symbols defined in the section. Since we don't
2698 know the symbol alignment requirement, we start with the
2699 maximum alignment and check low bits of the symbol address
2700 for the minimum alignment. */
2701 power_of_two
= bfd_get_section_alignment (sec
->owner
, sec
);
2702 mask
= ((bfd_vma
) 1 << power_of_two
) - 1;
2703 while ((h
->root
.u
.def
.value
& mask
) != 0)
2709 if (power_of_two
> bfd_get_section_alignment (dynbss
->owner
,
2712 /* Adjust the section alignment if needed. */
2713 if (! bfd_set_section_alignment (dynbss
->owner
, dynbss
,
2718 /* We make sure that the symbol will be aligned properly. */
2719 dynbss
->size
= BFD_ALIGN (dynbss
->size
, mask
+ 1);
2721 /* Define the symbol as being at this point in DYNBSS. */
2722 h
->root
.u
.def
.section
= dynbss
;
2723 h
->root
.u
.def
.value
= dynbss
->size
;
2725 /* Increment the size of DYNBSS to make room for the symbol. */
2726 dynbss
->size
+= h
->size
;
2731 /* Adjust all external symbols pointing into SEC_MERGE sections
2732 to reflect the object merging within the sections. */
2735 _bfd_elf_link_sec_merge_syms (struct elf_link_hash_entry
*h
, void *data
)
2739 if ((h
->root
.type
== bfd_link_hash_defined
2740 || h
->root
.type
== bfd_link_hash_defweak
)
2741 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
2742 && sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
)
2744 bfd
*output_bfd
= (bfd
*) data
;
2746 h
->root
.u
.def
.value
=
2747 _bfd_merged_section_offset (output_bfd
,
2748 &h
->root
.u
.def
.section
,
2749 elf_section_data (sec
)->sec_info
,
2750 h
->root
.u
.def
.value
);
2756 /* Returns false if the symbol referred to by H should be considered
2757 to resolve local to the current module, and true if it should be
2758 considered to bind dynamically. */
2761 _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry
*h
,
2762 struct bfd_link_info
*info
,
2763 bfd_boolean not_local_protected
)
2765 bfd_boolean binding_stays_local_p
;
2766 const struct elf_backend_data
*bed
;
2767 struct elf_link_hash_table
*hash_table
;
2772 while (h
->root
.type
== bfd_link_hash_indirect
2773 || h
->root
.type
== bfd_link_hash_warning
)
2774 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2776 /* If it was forced local, then clearly it's not dynamic. */
2777 if (h
->dynindx
== -1)
2779 if (h
->forced_local
)
2782 /* Identify the cases where name binding rules say that a
2783 visible symbol resolves locally. */
2784 binding_stays_local_p
= info
->executable
|| SYMBOLIC_BIND (info
, h
);
2786 switch (ELF_ST_VISIBILITY (h
->other
))
2793 hash_table
= elf_hash_table (info
);
2794 if (!is_elf_hash_table (hash_table
))
2797 bed
= get_elf_backend_data (hash_table
->dynobj
);
2799 /* Proper resolution for function pointer equality may require
2800 that these symbols perhaps be resolved dynamically, even though
2801 we should be resolving them to the current module. */
2802 if (!not_local_protected
|| !bed
->is_function_type (h
->type
))
2803 binding_stays_local_p
= TRUE
;
2810 /* If it isn't defined locally, then clearly it's dynamic. */
2811 if (!h
->def_regular
&& !ELF_COMMON_DEF_P (h
))
2814 /* Otherwise, the symbol is dynamic if binding rules don't tell
2815 us that it remains local. */
2816 return !binding_stays_local_p
;
2819 /* Return true if the symbol referred to by H should be considered
2820 to resolve local to the current module, and false otherwise. Differs
2821 from (the inverse of) _bfd_elf_dynamic_symbol_p in the treatment of
2822 undefined symbols. The two functions are virtually identical except
2823 for the place where forced_local and dynindx == -1 are tested. If
2824 either of those tests are true, _bfd_elf_dynamic_symbol_p will say
2825 the symbol is local, while _bfd_elf_symbol_refs_local_p will say
2826 the symbol is local only for defined symbols.
2827 It might seem that _bfd_elf_dynamic_symbol_p could be rewritten as
2828 !_bfd_elf_symbol_refs_local_p, except that targets differ in their
2829 treatment of undefined weak symbols. For those that do not make
2830 undefined weak symbols dynamic, both functions may return false. */
2833 _bfd_elf_symbol_refs_local_p (struct elf_link_hash_entry
*h
,
2834 struct bfd_link_info
*info
,
2835 bfd_boolean local_protected
)
2837 const struct elf_backend_data
*bed
;
2838 struct elf_link_hash_table
*hash_table
;
2840 /* If it's a local sym, of course we resolve locally. */
2844 /* STV_HIDDEN or STV_INTERNAL ones must be local. */
2845 if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
2846 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
2849 /* Common symbols that become definitions don't get the DEF_REGULAR
2850 flag set, so test it first, and don't bail out. */
2851 if (ELF_COMMON_DEF_P (h
))
2853 /* If we don't have a definition in a regular file, then we can't
2854 resolve locally. The sym is either undefined or dynamic. */
2855 else if (!h
->def_regular
)
2858 /* Forced local symbols resolve locally. */
2859 if (h
->forced_local
)
2862 /* As do non-dynamic symbols. */
2863 if (h
->dynindx
== -1)
2866 /* At this point, we know the symbol is defined and dynamic. In an
2867 executable it must resolve locally, likewise when building symbolic
2868 shared libraries. */
2869 if (info
->executable
|| SYMBOLIC_BIND (info
, h
))
2872 /* Now deal with defined dynamic symbols in shared libraries. Ones
2873 with default visibility might not resolve locally. */
2874 if (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
)
2877 hash_table
= elf_hash_table (info
);
2878 if (!is_elf_hash_table (hash_table
))
2881 bed
= get_elf_backend_data (hash_table
->dynobj
);
2883 /* STV_PROTECTED non-function symbols are local. */
2884 if (!bed
->is_function_type (h
->type
))
2887 /* Function pointer equality tests may require that STV_PROTECTED
2888 symbols be treated as dynamic symbols. If the address of a
2889 function not defined in an executable is set to that function's
2890 plt entry in the executable, then the address of the function in
2891 a shared library must also be the plt entry in the executable. */
2892 return local_protected
;
2895 /* Caches some TLS segment info, and ensures that the TLS segment vma is
2896 aligned. Returns the first TLS output section. */
2898 struct bfd_section
*
2899 _bfd_elf_tls_setup (bfd
*obfd
, struct bfd_link_info
*info
)
2901 struct bfd_section
*sec
, *tls
;
2902 unsigned int align
= 0;
2904 for (sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2905 if ((sec
->flags
& SEC_THREAD_LOCAL
) != 0)
2909 for (; sec
!= NULL
&& (sec
->flags
& SEC_THREAD_LOCAL
) != 0; sec
= sec
->next
)
2910 if (sec
->alignment_power
> align
)
2911 align
= sec
->alignment_power
;
2913 elf_hash_table (info
)->tls_sec
= tls
;
2915 /* Ensure the alignment of the first section is the largest alignment,
2916 so that the tls segment starts aligned. */
2918 tls
->alignment_power
= align
;
2923 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
2925 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
2926 Elf_Internal_Sym
*sym
)
2928 const struct elf_backend_data
*bed
;
2930 /* Local symbols do not count, but target specific ones might. */
2931 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
2932 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
2935 bed
= get_elf_backend_data (abfd
);
2936 /* Function symbols do not count. */
2937 if (bed
->is_function_type (ELF_ST_TYPE (sym
->st_info
)))
2940 /* If the section is undefined, then so is the symbol. */
2941 if (sym
->st_shndx
== SHN_UNDEF
)
2944 /* If the symbol is defined in the common section, then
2945 it is a common definition and so does not count. */
2946 if (bed
->common_definition (sym
))
2949 /* If the symbol is in a target specific section then we
2950 must rely upon the backend to tell us what it is. */
2951 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
2952 /* FIXME - this function is not coded yet:
2954 return _bfd_is_global_symbol_definition (abfd, sym);
2956 Instead for now assume that the definition is not global,
2957 Even if this is wrong, at least the linker will behave
2958 in the same way that it used to do. */
2964 /* Search the symbol table of the archive element of the archive ABFD
2965 whose archive map contains a mention of SYMDEF, and determine if
2966 the symbol is defined in this element. */
2968 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
2970 Elf_Internal_Shdr
* hdr
;
2971 bfd_size_type symcount
;
2972 bfd_size_type extsymcount
;
2973 bfd_size_type extsymoff
;
2974 Elf_Internal_Sym
*isymbuf
;
2975 Elf_Internal_Sym
*isym
;
2976 Elf_Internal_Sym
*isymend
;
2979 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
2983 if (! bfd_check_format (abfd
, bfd_object
))
2986 /* If we have already included the element containing this symbol in the
2987 link then we do not need to include it again. Just claim that any symbol
2988 it contains is not a definition, so that our caller will not decide to
2989 (re)include this element. */
2990 if (abfd
->archive_pass
)
2993 /* Select the appropriate symbol table. */
2994 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
2995 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2997 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
2999 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
3001 /* The sh_info field of the symtab header tells us where the
3002 external symbols start. We don't care about the local symbols. */
3003 if (elf_bad_symtab (abfd
))
3005 extsymcount
= symcount
;
3010 extsymcount
= symcount
- hdr
->sh_info
;
3011 extsymoff
= hdr
->sh_info
;
3014 if (extsymcount
== 0)
3017 /* Read in the symbol table. */
3018 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3020 if (isymbuf
== NULL
)
3023 /* Scan the symbol table looking for SYMDEF. */
3025 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
3029 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3034 if (strcmp (name
, symdef
->name
) == 0)
3036 result
= is_global_data_symbol_definition (abfd
, isym
);
3046 /* Add an entry to the .dynamic table. */
3049 _bfd_elf_add_dynamic_entry (struct bfd_link_info
*info
,
3053 struct elf_link_hash_table
*hash_table
;
3054 const struct elf_backend_data
*bed
;
3056 bfd_size_type newsize
;
3057 bfd_byte
*newcontents
;
3058 Elf_Internal_Dyn dyn
;
3060 hash_table
= elf_hash_table (info
);
3061 if (! is_elf_hash_table (hash_table
))
3064 bed
= get_elf_backend_data (hash_table
->dynobj
);
3065 s
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3066 BFD_ASSERT (s
!= NULL
);
3068 newsize
= s
->size
+ bed
->s
->sizeof_dyn
;
3069 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
3070 if (newcontents
== NULL
)
3074 dyn
.d_un
.d_val
= val
;
3075 bed
->s
->swap_dyn_out (hash_table
->dynobj
, &dyn
, newcontents
+ s
->size
);
3078 s
->contents
= newcontents
;
3083 /* Add a DT_NEEDED entry for this dynamic object if DO_IT is true,
3084 otherwise just check whether one already exists. Returns -1 on error,
3085 1 if a DT_NEEDED tag already exists, and 0 on success. */
3088 elf_add_dt_needed_tag (bfd
*abfd
,
3089 struct bfd_link_info
*info
,
3093 struct elf_link_hash_table
*hash_table
;
3094 bfd_size_type oldsize
;
3095 bfd_size_type strindex
;
3097 if (!_bfd_elf_link_create_dynstrtab (abfd
, info
))
3100 hash_table
= elf_hash_table (info
);
3101 oldsize
= _bfd_elf_strtab_size (hash_table
->dynstr
);
3102 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, soname
, FALSE
);
3103 if (strindex
== (bfd_size_type
) -1)
3106 if (oldsize
== _bfd_elf_strtab_size (hash_table
->dynstr
))
3109 const struct elf_backend_data
*bed
;
3112 bed
= get_elf_backend_data (hash_table
->dynobj
);
3113 sdyn
= bfd_get_linker_section (hash_table
->dynobj
, ".dynamic");
3115 for (extdyn
= sdyn
->contents
;
3116 extdyn
< sdyn
->contents
+ sdyn
->size
;
3117 extdyn
+= bed
->s
->sizeof_dyn
)
3119 Elf_Internal_Dyn dyn
;
3121 bed
->s
->swap_dyn_in (hash_table
->dynobj
, extdyn
, &dyn
);
3122 if (dyn
.d_tag
== DT_NEEDED
3123 && dyn
.d_un
.d_val
== strindex
)
3125 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3133 if (!_bfd_elf_link_create_dynamic_sections (hash_table
->dynobj
, info
))
3136 if (!_bfd_elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
3140 /* We were just checking for existence of the tag. */
3141 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
3147 on_needed_list (const char *soname
, struct bfd_link_needed_list
*needed
)
3149 for (; needed
!= NULL
; needed
= needed
->next
)
3150 if (strcmp (soname
, needed
->name
) == 0)
3156 /* Sort symbol by value, section, and size. */
3158 elf_sort_symbol (const void *arg1
, const void *arg2
)
3160 const struct elf_link_hash_entry
*h1
;
3161 const struct elf_link_hash_entry
*h2
;
3162 bfd_signed_vma vdiff
;
3164 h1
= *(const struct elf_link_hash_entry
**) arg1
;
3165 h2
= *(const struct elf_link_hash_entry
**) arg2
;
3166 vdiff
= h1
->root
.u
.def
.value
- h2
->root
.u
.def
.value
;
3168 return vdiff
> 0 ? 1 : -1;
3171 long sdiff
= h1
->root
.u
.def
.section
->id
- h2
->root
.u
.def
.section
->id
;
3173 return sdiff
> 0 ? 1 : -1;
3175 vdiff
= h1
->size
- h2
->size
;
3176 return vdiff
== 0 ? 0 : vdiff
> 0 ? 1 : -1;
3179 /* This function is used to adjust offsets into .dynstr for
3180 dynamic symbols. This is called via elf_link_hash_traverse. */
3183 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
3185 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3187 if (h
->dynindx
!= -1)
3188 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3192 /* Assign string offsets in .dynstr, update all structures referencing
3196 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
3198 struct elf_link_hash_table
*hash_table
= elf_hash_table (info
);
3199 struct elf_link_local_dynamic_entry
*entry
;
3200 struct elf_strtab_hash
*dynstr
= hash_table
->dynstr
;
3201 bfd
*dynobj
= hash_table
->dynobj
;
3204 const struct elf_backend_data
*bed
;
3207 _bfd_elf_strtab_finalize (dynstr
);
3208 size
= _bfd_elf_strtab_size (dynstr
);
3210 bed
= get_elf_backend_data (dynobj
);
3211 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3212 BFD_ASSERT (sdyn
!= NULL
);
3214 /* Update all .dynamic entries referencing .dynstr strings. */
3215 for (extdyn
= sdyn
->contents
;
3216 extdyn
< sdyn
->contents
+ sdyn
->size
;
3217 extdyn
+= bed
->s
->sizeof_dyn
)
3219 Elf_Internal_Dyn dyn
;
3221 bed
->s
->swap_dyn_in (dynobj
, extdyn
, &dyn
);
3225 dyn
.d_un
.d_val
= size
;
3235 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3240 bed
->s
->swap_dyn_out (dynobj
, &dyn
, extdyn
);
3243 /* Now update local dynamic symbols. */
3244 for (entry
= hash_table
->dynlocal
; entry
; entry
= entry
->next
)
3245 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3246 entry
->isym
.st_name
);
3248 /* And the rest of dynamic symbols. */
3249 elf_link_hash_traverse (hash_table
, elf_adjust_dynstr_offsets
, dynstr
);
3251 /* Adjust version definitions. */
3252 if (elf_tdata (output_bfd
)->cverdefs
)
3257 Elf_Internal_Verdef def
;
3258 Elf_Internal_Verdaux defaux
;
3260 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
3264 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3266 p
+= sizeof (Elf_External_Verdef
);
3267 if (def
.vd_aux
!= sizeof (Elf_External_Verdef
))
3269 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3271 _bfd_elf_swap_verdaux_in (output_bfd
,
3272 (Elf_External_Verdaux
*) p
, &defaux
);
3273 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3275 _bfd_elf_swap_verdaux_out (output_bfd
,
3276 &defaux
, (Elf_External_Verdaux
*) p
);
3277 p
+= sizeof (Elf_External_Verdaux
);
3280 while (def
.vd_next
);
3283 /* Adjust version references. */
3284 if (elf_tdata (output_bfd
)->verref
)
3289 Elf_Internal_Verneed need
;
3290 Elf_Internal_Vernaux needaux
;
3292 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
3296 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3298 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3299 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3300 (Elf_External_Verneed
*) p
);
3301 p
+= sizeof (Elf_External_Verneed
);
3302 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3304 _bfd_elf_swap_vernaux_in (output_bfd
,
3305 (Elf_External_Vernaux
*) p
, &needaux
);
3306 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3308 _bfd_elf_swap_vernaux_out (output_bfd
,
3310 (Elf_External_Vernaux
*) p
);
3311 p
+= sizeof (Elf_External_Vernaux
);
3314 while (need
.vn_next
);
3320 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3321 The default is to only match when the INPUT and OUTPUT are exactly
3325 _bfd_elf_default_relocs_compatible (const bfd_target
*input
,
3326 const bfd_target
*output
)
3328 return input
== output
;
3331 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT.
3332 This version is used when different targets for the same architecture
3333 are virtually identical. */
3336 _bfd_elf_relocs_compatible (const bfd_target
*input
,
3337 const bfd_target
*output
)
3339 const struct elf_backend_data
*obed
, *ibed
;
3341 if (input
== output
)
3344 ibed
= xvec_get_elf_backend_data (input
);
3345 obed
= xvec_get_elf_backend_data (output
);
3347 if (ibed
->arch
!= obed
->arch
)
3350 /* If both backends are using this function, deem them compatible. */
3351 return ibed
->relocs_compatible
== obed
->relocs_compatible
;
3354 /* Add symbols from an ELF object file to the linker hash table. */
3357 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
3359 Elf_Internal_Ehdr
*ehdr
;
3360 Elf_Internal_Shdr
*hdr
;
3361 bfd_size_type symcount
;
3362 bfd_size_type extsymcount
;
3363 bfd_size_type extsymoff
;
3364 struct elf_link_hash_entry
**sym_hash
;
3365 bfd_boolean dynamic
;
3366 Elf_External_Versym
*extversym
= NULL
;
3367 Elf_External_Versym
*ever
;
3368 struct elf_link_hash_entry
*weaks
;
3369 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
3370 bfd_size_type nondeflt_vers_cnt
= 0;
3371 Elf_Internal_Sym
*isymbuf
= NULL
;
3372 Elf_Internal_Sym
*isym
;
3373 Elf_Internal_Sym
*isymend
;
3374 const struct elf_backend_data
*bed
;
3375 bfd_boolean add_needed
;
3376 struct elf_link_hash_table
*htab
;
3378 void *alloc_mark
= NULL
;
3379 struct bfd_hash_entry
**old_table
= NULL
;
3380 unsigned int old_size
= 0;
3381 unsigned int old_count
= 0;
3382 void *old_tab
= NULL
;
3385 struct bfd_link_hash_entry
*old_undefs
= NULL
;
3386 struct bfd_link_hash_entry
*old_undefs_tail
= NULL
;
3387 long old_dynsymcount
= 0;
3389 size_t hashsize
= 0;
3391 htab
= elf_hash_table (info
);
3392 bed
= get_elf_backend_data (abfd
);
3394 if ((abfd
->flags
& DYNAMIC
) == 0)
3400 /* You can't use -r against a dynamic object. Also, there's no
3401 hope of using a dynamic object which does not exactly match
3402 the format of the output file. */
3403 if (info
->relocatable
3404 || !is_elf_hash_table (htab
)
3405 || info
->output_bfd
->xvec
!= abfd
->xvec
)
3407 if (info
->relocatable
)
3408 bfd_set_error (bfd_error_invalid_operation
);
3410 bfd_set_error (bfd_error_wrong_format
);
3415 ehdr
= elf_elfheader (abfd
);
3416 if (info
->warn_alternate_em
3417 && bed
->elf_machine_code
!= ehdr
->e_machine
3418 && ((bed
->elf_machine_alt1
!= 0
3419 && ehdr
->e_machine
== bed
->elf_machine_alt1
)
3420 || (bed
->elf_machine_alt2
!= 0
3421 && ehdr
->e_machine
== bed
->elf_machine_alt2
)))
3422 info
->callbacks
->einfo
3423 (_("%P: alternate ELF machine code found (%d) in %B, expecting %d\n"),
3424 ehdr
->e_machine
, abfd
, bed
->elf_machine_code
);
3426 /* As a GNU extension, any input sections which are named
3427 .gnu.warning.SYMBOL are treated as warning symbols for the given
3428 symbol. This differs from .gnu.warning sections, which generate
3429 warnings when they are included in an output file. */
3430 /* PR 12761: Also generate this warning when building shared libraries. */
3431 if (info
->executable
|| info
->shared
)
3435 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3439 name
= bfd_get_section_name (abfd
, s
);
3440 if (CONST_STRNEQ (name
, ".gnu.warning."))
3445 name
+= sizeof ".gnu.warning." - 1;
3447 /* If this is a shared object, then look up the symbol
3448 in the hash table. If it is there, and it is already
3449 been defined, then we will not be using the entry
3450 from this shared object, so we don't need to warn.
3451 FIXME: If we see the definition in a regular object
3452 later on, we will warn, but we shouldn't. The only
3453 fix is to keep track of what warnings we are supposed
3454 to emit, and then handle them all at the end of the
3458 struct elf_link_hash_entry
*h
;
3460 h
= elf_link_hash_lookup (htab
, name
, FALSE
, FALSE
, TRUE
);
3462 /* FIXME: What about bfd_link_hash_common? */
3464 && (h
->root
.type
== bfd_link_hash_defined
3465 || h
->root
.type
== bfd_link_hash_defweak
))
3467 /* We don't want to issue this warning. Clobber
3468 the section size so that the warning does not
3469 get copied into the output file. */
3476 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
3480 if (! bfd_get_section_contents (abfd
, s
, msg
, 0, sz
))
3485 if (! (_bfd_generic_link_add_one_symbol
3486 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
3487 FALSE
, bed
->collect
, NULL
)))
3490 if (! info
->relocatable
)
3492 /* Clobber the section size so that the warning does
3493 not get copied into the output file. */
3496 /* Also set SEC_EXCLUDE, so that symbols defined in
3497 the warning section don't get copied to the output. */
3498 s
->flags
|= SEC_EXCLUDE
;
3507 /* If we are creating a shared library, create all the dynamic
3508 sections immediately. We need to attach them to something,
3509 so we attach them to this BFD, provided it is the right
3510 format. FIXME: If there are no input BFD's of the same
3511 format as the output, we can't make a shared library. */
3513 && is_elf_hash_table (htab
)
3514 && info
->output_bfd
->xvec
== abfd
->xvec
3515 && !htab
->dynamic_sections_created
)
3517 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
3521 else if (!is_elf_hash_table (htab
))
3526 const char *soname
= NULL
;
3528 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
3531 /* ld --just-symbols and dynamic objects don't mix very well.
3532 ld shouldn't allow it. */
3533 if ((s
= abfd
->sections
) != NULL
3534 && s
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3537 /* If this dynamic lib was specified on the command line with
3538 --as-needed in effect, then we don't want to add a DT_NEEDED
3539 tag unless the lib is actually used. Similary for libs brought
3540 in by another lib's DT_NEEDED. When --no-add-needed is used
3541 on a dynamic lib, we don't want to add a DT_NEEDED entry for
3542 any dynamic library in DT_NEEDED tags in the dynamic lib at
3544 add_needed
= (elf_dyn_lib_class (abfd
)
3545 & (DYN_AS_NEEDED
| DYN_DT_NEEDED
3546 | DYN_NO_NEEDED
)) == 0;
3548 s
= bfd_get_section_by_name (abfd
, ".dynamic");
3553 unsigned int elfsec
;
3554 unsigned long shlink
;
3556 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
3563 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
3564 if (elfsec
== SHN_BAD
)
3565 goto error_free_dyn
;
3566 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
3568 for (extdyn
= dynbuf
;
3569 extdyn
< dynbuf
+ s
->size
;
3570 extdyn
+= bed
->s
->sizeof_dyn
)
3572 Elf_Internal_Dyn dyn
;
3574 bed
->s
->swap_dyn_in (abfd
, extdyn
, &dyn
);
3575 if (dyn
.d_tag
== DT_SONAME
)
3577 unsigned int tagv
= dyn
.d_un
.d_val
;
3578 soname
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3580 goto error_free_dyn
;
3582 if (dyn
.d_tag
== DT_NEEDED
)
3584 struct bfd_link_needed_list
*n
, **pn
;
3586 unsigned int tagv
= dyn
.d_un
.d_val
;
3588 amt
= sizeof (struct bfd_link_needed_list
);
3589 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3590 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3591 if (n
== NULL
|| fnm
== NULL
)
3592 goto error_free_dyn
;
3593 amt
= strlen (fnm
) + 1;
3594 anm
= (char *) bfd_alloc (abfd
, amt
);
3596 goto error_free_dyn
;
3597 memcpy (anm
, fnm
, amt
);
3601 for (pn
= &htab
->needed
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3605 if (dyn
.d_tag
== DT_RUNPATH
)
3607 struct bfd_link_needed_list
*n
, **pn
;
3609 unsigned int tagv
= dyn
.d_un
.d_val
;
3611 amt
= sizeof (struct bfd_link_needed_list
);
3612 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3613 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3614 if (n
== NULL
|| fnm
== NULL
)
3615 goto error_free_dyn
;
3616 amt
= strlen (fnm
) + 1;
3617 anm
= (char *) bfd_alloc (abfd
, amt
);
3619 goto error_free_dyn
;
3620 memcpy (anm
, fnm
, amt
);
3624 for (pn
= & runpath
;
3630 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
3631 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
3633 struct bfd_link_needed_list
*n
, **pn
;
3635 unsigned int tagv
= dyn
.d_un
.d_val
;
3637 amt
= sizeof (struct bfd_link_needed_list
);
3638 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
3639 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3640 if (n
== NULL
|| fnm
== NULL
)
3641 goto error_free_dyn
;
3642 amt
= strlen (fnm
) + 1;
3643 anm
= (char *) bfd_alloc (abfd
, amt
);
3645 goto error_free_dyn
;
3646 memcpy (anm
, fnm
, amt
);
3656 if (dyn
.d_tag
== DT_AUDIT
)
3658 unsigned int tagv
= dyn
.d_un
.d_val
;
3659 audit
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
3666 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
3667 frees all more recently bfd_alloc'd blocks as well. */
3673 struct bfd_link_needed_list
**pn
;
3674 for (pn
= &htab
->runpath
; *pn
!= NULL
; pn
= &(*pn
)->next
)
3679 /* We do not want to include any of the sections in a dynamic
3680 object in the output file. We hack by simply clobbering the
3681 list of sections in the BFD. This could be handled more
3682 cleanly by, say, a new section flag; the existing
3683 SEC_NEVER_LOAD flag is not the one we want, because that one
3684 still implies that the section takes up space in the output
3686 bfd_section_list_clear (abfd
);
3688 /* Find the name to use in a DT_NEEDED entry that refers to this
3689 object. If the object has a DT_SONAME entry, we use it.
3690 Otherwise, if the generic linker stuck something in
3691 elf_dt_name, we use that. Otherwise, we just use the file
3693 if (soname
== NULL
|| *soname
== '\0')
3695 soname
= elf_dt_name (abfd
);
3696 if (soname
== NULL
|| *soname
== '\0')
3697 soname
= bfd_get_filename (abfd
);
3700 /* Save the SONAME because sometimes the linker emulation code
3701 will need to know it. */
3702 elf_dt_name (abfd
) = soname
;
3704 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
3708 /* If we have already included this dynamic object in the
3709 link, just ignore it. There is no reason to include a
3710 particular dynamic object more than once. */
3714 /* Save the DT_AUDIT entry for the linker emulation code. */
3715 elf_dt_audit (abfd
) = audit
;
3718 /* If this is a dynamic object, we always link against the .dynsym
3719 symbol table, not the .symtab symbol table. The dynamic linker
3720 will only see the .dynsym symbol table, so there is no reason to
3721 look at .symtab for a dynamic object. */
3723 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
3724 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3726 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
3728 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
3730 /* The sh_info field of the symtab header tells us where the
3731 external symbols start. We don't care about the local symbols at
3733 if (elf_bad_symtab (abfd
))
3735 extsymcount
= symcount
;
3740 extsymcount
= symcount
- hdr
->sh_info
;
3741 extsymoff
= hdr
->sh_info
;
3745 if (extsymcount
!= 0)
3747 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
3749 if (isymbuf
== NULL
)
3752 /* We store a pointer to the hash table entry for each external
3754 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
3755 sym_hash
= (struct elf_link_hash_entry
**) bfd_alloc (abfd
, amt
);
3756 if (sym_hash
== NULL
)
3757 goto error_free_sym
;
3758 elf_sym_hashes (abfd
) = sym_hash
;
3763 /* Read in any version definitions. */
3764 if (!_bfd_elf_slurp_version_tables (abfd
,
3765 info
->default_imported_symver
))
3766 goto error_free_sym
;
3768 /* Read in the symbol versions, but don't bother to convert them
3769 to internal format. */
3770 if (elf_dynversym (abfd
) != 0)
3772 Elf_Internal_Shdr
*versymhdr
;
3774 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
3775 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
3776 if (extversym
== NULL
)
3777 goto error_free_sym
;
3778 amt
= versymhdr
->sh_size
;
3779 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
3780 || bfd_bread (extversym
, amt
, abfd
) != amt
)
3781 goto error_free_vers
;
3785 /* If we are loading an as-needed shared lib, save the symbol table
3786 state before we start adding symbols. If the lib turns out
3787 to be unneeded, restore the state. */
3788 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
3793 for (entsize
= 0, i
= 0; i
< htab
->root
.table
.size
; i
++)
3795 struct bfd_hash_entry
*p
;
3796 struct elf_link_hash_entry
*h
;
3798 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3800 h
= (struct elf_link_hash_entry
*) p
;
3801 entsize
+= htab
->root
.table
.entsize
;
3802 if (h
->root
.type
== bfd_link_hash_warning
)
3803 entsize
+= htab
->root
.table
.entsize
;
3807 tabsize
= htab
->root
.table
.size
* sizeof (struct bfd_hash_entry
*);
3808 hashsize
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
3809 old_tab
= bfd_malloc (tabsize
+ entsize
+ hashsize
);
3810 if (old_tab
== NULL
)
3811 goto error_free_vers
;
3813 /* Remember the current objalloc pointer, so that all mem for
3814 symbols added can later be reclaimed. */
3815 alloc_mark
= bfd_hash_allocate (&htab
->root
.table
, 1);
3816 if (alloc_mark
== NULL
)
3817 goto error_free_vers
;
3819 /* Make a special call to the linker "notice" function to
3820 tell it that we are about to handle an as-needed lib. */
3821 if (!(*info
->callbacks
->notice
) (info
, NULL
, abfd
, NULL
,
3822 notice_as_needed
, 0, NULL
))
3823 goto error_free_vers
;
3825 /* Clone the symbol table and sym hashes. Remember some
3826 pointers into the symbol table, and dynamic symbol count. */
3827 old_hash
= (char *) old_tab
+ tabsize
;
3828 old_ent
= (char *) old_hash
+ hashsize
;
3829 memcpy (old_tab
, htab
->root
.table
.table
, tabsize
);
3830 memcpy (old_hash
, sym_hash
, hashsize
);
3831 old_undefs
= htab
->root
.undefs
;
3832 old_undefs_tail
= htab
->root
.undefs_tail
;
3833 old_table
= htab
->root
.table
.table
;
3834 old_size
= htab
->root
.table
.size
;
3835 old_count
= htab
->root
.table
.count
;
3836 old_dynsymcount
= htab
->dynsymcount
;
3838 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
3840 struct bfd_hash_entry
*p
;
3841 struct elf_link_hash_entry
*h
;
3843 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
3845 memcpy (old_ent
, p
, htab
->root
.table
.entsize
);
3846 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3847 h
= (struct elf_link_hash_entry
*) p
;
3848 if (h
->root
.type
== bfd_link_hash_warning
)
3850 memcpy (old_ent
, h
->root
.u
.i
.link
, htab
->root
.table
.entsize
);
3851 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
3858 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
3859 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
3861 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
3865 asection
*sec
, *new_sec
;
3868 struct elf_link_hash_entry
*h
;
3869 struct elf_link_hash_entry
*hi
;
3870 bfd_boolean definition
;
3871 bfd_boolean size_change_ok
;
3872 bfd_boolean type_change_ok
;
3873 bfd_boolean new_weakdef
;
3874 bfd_boolean new_weak
;
3875 bfd_boolean old_weak
;
3876 bfd_boolean override
;
3878 unsigned int old_alignment
;
3880 bfd
* undef_bfd
= NULL
;
3884 flags
= BSF_NO_FLAGS
;
3886 value
= isym
->st_value
;
3888 common
= bed
->common_definition (isym
);
3890 bind
= ELF_ST_BIND (isym
->st_info
);
3894 /* This should be impossible, since ELF requires that all
3895 global symbols follow all local symbols, and that sh_info
3896 point to the first global symbol. Unfortunately, Irix 5
3901 if (isym
->st_shndx
!= SHN_UNDEF
&& !common
)
3909 case STB_GNU_UNIQUE
:
3910 flags
= BSF_GNU_UNIQUE
;
3914 /* Leave it up to the processor backend. */
3918 if (isym
->st_shndx
== SHN_UNDEF
)
3919 sec
= bfd_und_section_ptr
;
3920 else if (isym
->st_shndx
== SHN_ABS
)
3921 sec
= bfd_abs_section_ptr
;
3922 else if (isym
->st_shndx
== SHN_COMMON
)
3924 sec
= bfd_com_section_ptr
;
3925 /* What ELF calls the size we call the value. What ELF
3926 calls the value we call the alignment. */
3927 value
= isym
->st_size
;
3931 sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
3933 sec
= bfd_abs_section_ptr
;
3934 else if (discarded_section (sec
))
3936 /* Symbols from discarded section are undefined. We keep
3938 sec
= bfd_und_section_ptr
;
3939 isym
->st_shndx
= SHN_UNDEF
;
3941 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
3945 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
3948 goto error_free_vers
;
3950 if (isym
->st_shndx
== SHN_COMMON
3951 && (abfd
->flags
& BFD_PLUGIN
) != 0)
3953 asection
*xc
= bfd_get_section_by_name (abfd
, "COMMON");
3957 flagword sflags
= (SEC_ALLOC
| SEC_IS_COMMON
| SEC_KEEP
3959 xc
= bfd_make_section_with_flags (abfd
, "COMMON", sflags
);
3961 goto error_free_vers
;
3965 else if (isym
->st_shndx
== SHN_COMMON
3966 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
3967 && !info
->relocatable
)
3969 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
3973 flagword sflags
= (SEC_ALLOC
| SEC_THREAD_LOCAL
| SEC_IS_COMMON
3974 | SEC_LINKER_CREATED
);
3975 tcomm
= bfd_make_section_with_flags (abfd
, ".tcommon", sflags
);
3977 goto error_free_vers
;
3981 else if (bed
->elf_add_symbol_hook
)
3983 if (! (*bed
->elf_add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
,
3985 goto error_free_vers
;
3987 /* The hook function sets the name to NULL if this symbol
3988 should be skipped for some reason. */
3993 /* Sanity check that all possibilities were handled. */
3996 bfd_set_error (bfd_error_bad_value
);
3997 goto error_free_vers
;
4000 if (bfd_is_und_section (sec
)
4001 || bfd_is_com_section (sec
))
4006 size_change_ok
= FALSE
;
4007 type_change_ok
= bed
->type_change_ok
;
4013 if (is_elf_hash_table (htab
))
4015 Elf_Internal_Versym iver
;
4016 unsigned int vernum
= 0;
4019 /* If this is a definition of a symbol which was previously
4020 referenced in a non-weak manner then make a note of the bfd
4021 that contained the reference. This is used if we need to
4022 refer to the source of the reference later on. */
4023 if (! bfd_is_und_section (sec
))
4025 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, FALSE
);
4028 && h
->root
.type
== bfd_link_hash_undefined
4029 && h
->root
.u
.undef
.abfd
)
4030 undef_bfd
= h
->root
.u
.undef
.abfd
;
4035 if (info
->default_imported_symver
)
4036 /* Use the default symbol version created earlier. */
4037 iver
.vs_vers
= elf_tdata (abfd
)->cverdefs
;
4042 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
4044 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
4046 /* If this is a hidden symbol, or if it is not version
4047 1, we append the version name to the symbol name.
4048 However, we do not modify a non-hidden absolute symbol
4049 if it is not a function, because it might be the version
4050 symbol itself. FIXME: What if it isn't? */
4051 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
4053 && (!bfd_is_abs_section (sec
)
4054 || bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
)))))
4057 size_t namelen
, verlen
, newlen
;
4060 if (isym
->st_shndx
!= SHN_UNDEF
)
4062 if (vernum
> elf_tdata (abfd
)->cverdefs
)
4064 else if (vernum
> 1)
4066 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
4072 (*_bfd_error_handler
)
4073 (_("%B: %s: invalid version %u (max %d)"),
4075 elf_tdata (abfd
)->cverdefs
);
4076 bfd_set_error (bfd_error_bad_value
);
4077 goto error_free_vers
;
4082 /* We cannot simply test for the number of
4083 entries in the VERNEED section since the
4084 numbers for the needed versions do not start
4086 Elf_Internal_Verneed
*t
;
4089 for (t
= elf_tdata (abfd
)->verref
;
4093 Elf_Internal_Vernaux
*a
;
4095 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4097 if (a
->vna_other
== vernum
)
4099 verstr
= a
->vna_nodename
;
4108 (*_bfd_error_handler
)
4109 (_("%B: %s: invalid needed version %d"),
4110 abfd
, name
, vernum
);
4111 bfd_set_error (bfd_error_bad_value
);
4112 goto error_free_vers
;
4116 namelen
= strlen (name
);
4117 verlen
= strlen (verstr
);
4118 newlen
= namelen
+ verlen
+ 2;
4119 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4120 && isym
->st_shndx
!= SHN_UNDEF
)
4123 newname
= (char *) bfd_hash_allocate (&htab
->root
.table
, newlen
);
4124 if (newname
== NULL
)
4125 goto error_free_vers
;
4126 memcpy (newname
, name
, namelen
);
4127 p
= newname
+ namelen
;
4129 /* If this is a defined non-hidden version symbol,
4130 we add another @ to the name. This indicates the
4131 default version of the symbol. */
4132 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
4133 && isym
->st_shndx
!= SHN_UNDEF
)
4135 memcpy (p
, verstr
, verlen
+ 1);
4140 /* If necessary, make a second attempt to locate the bfd
4141 containing an unresolved, non-weak reference to the
4143 if (! bfd_is_und_section (sec
) && undef_bfd
== NULL
)
4145 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, FALSE
);
4148 && h
->root
.type
== bfd_link_hash_undefined
4149 && h
->root
.u
.undef
.abfd
)
4150 undef_bfd
= h
->root
.u
.undef
.abfd
;
4153 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
,
4154 &value
, &old_weak
, &old_alignment
,
4155 sym_hash
, &skip
, &override
,
4156 &type_change_ok
, &size_change_ok
))
4157 goto error_free_vers
;
4166 while (h
->root
.type
== bfd_link_hash_indirect
4167 || h
->root
.type
== bfd_link_hash_warning
)
4168 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4170 /* Remember the old alignment if this is a common symbol, so
4171 that we don't reduce the alignment later on. We can't
4172 check later, because _bfd_generic_link_add_one_symbol
4173 will set a default for the alignment which we want to
4174 override. We also remember the old bfd where the existing
4175 definition comes from. */
4176 switch (h
->root
.type
)
4181 case bfd_link_hash_defined
:
4182 case bfd_link_hash_defweak
:
4183 old_bfd
= h
->root
.u
.def
.section
->owner
;
4186 case bfd_link_hash_common
:
4187 old_bfd
= h
->root
.u
.c
.p
->section
->owner
;
4188 old_alignment
= h
->root
.u
.c
.p
->alignment_power
;
4192 if (elf_tdata (abfd
)->verdef
!= NULL
4196 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
4199 if (! (_bfd_generic_link_add_one_symbol
4200 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, bed
->collect
,
4201 (struct bfd_link_hash_entry
**) sym_hash
)))
4202 goto error_free_vers
;
4205 /* We need to make sure that indirect symbol dynamic flags are
4208 while (h
->root
.type
== bfd_link_hash_indirect
4209 || h
->root
.type
== bfd_link_hash_warning
)
4210 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4213 if (is_elf_hash_table (htab
))
4214 h
->unique_global
= (flags
& BSF_GNU_UNIQUE
) != 0;
4216 new_weak
= (flags
& BSF_WEAK
) != 0;
4217 new_weakdef
= FALSE
;
4221 && !bed
->is_function_type (ELF_ST_TYPE (isym
->st_info
))
4222 && is_elf_hash_table (htab
)
4223 && h
->u
.weakdef
== NULL
)
4225 /* Keep a list of all weak defined non function symbols from
4226 a dynamic object, using the weakdef field. Later in this
4227 function we will set the weakdef field to the correct
4228 value. We only put non-function symbols from dynamic
4229 objects on this list, because that happens to be the only
4230 time we need to know the normal symbol corresponding to a
4231 weak symbol, and the information is time consuming to
4232 figure out. If the weakdef field is not already NULL,
4233 then this symbol was already defined by some previous
4234 dynamic object, and we will be using that previous
4235 definition anyhow. */
4237 h
->u
.weakdef
= weaks
;
4242 /* Set the alignment of a common symbol. */
4243 if ((common
|| bfd_is_com_section (sec
))
4244 && h
->root
.type
== bfd_link_hash_common
)
4249 align
= bfd_log2 (isym
->st_value
);
4252 /* The new symbol is a common symbol in a shared object.
4253 We need to get the alignment from the section. */
4254 align
= new_sec
->alignment_power
;
4256 if (align
> old_alignment
)
4257 h
->root
.u
.c
.p
->alignment_power
= align
;
4259 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
4262 if (is_elf_hash_table (htab
))
4266 /* Check the alignment when a common symbol is involved. This
4267 can change when a common symbol is overridden by a normal
4268 definition or a common symbol is ignored due to the old
4269 normal definition. We need to make sure the maximum
4270 alignment is maintained. */
4271 if ((old_alignment
|| common
)
4272 && h
->root
.type
!= bfd_link_hash_common
)
4274 unsigned int common_align
;
4275 unsigned int normal_align
;
4276 unsigned int symbol_align
;
4280 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
4281 if (h
->root
.u
.def
.section
->owner
!= NULL
4282 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
4284 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
4285 if (normal_align
> symbol_align
)
4286 normal_align
= symbol_align
;
4289 normal_align
= symbol_align
;
4293 common_align
= old_alignment
;
4294 common_bfd
= old_bfd
;
4299 common_align
= bfd_log2 (isym
->st_value
);
4301 normal_bfd
= old_bfd
;
4304 if (normal_align
< common_align
)
4306 /* PR binutils/2735 */
4307 if (normal_bfd
== NULL
)
4308 (*_bfd_error_handler
)
4309 (_("Warning: alignment %u of common symbol `%s' in %B"
4310 " is greater than the alignment (%u) of its section %A"),
4311 common_bfd
, h
->root
.u
.def
.section
,
4312 1 << common_align
, name
, 1 << normal_align
);
4314 (*_bfd_error_handler
)
4315 (_("Warning: alignment %u of symbol `%s' in %B"
4316 " is smaller than %u in %B"),
4317 normal_bfd
, common_bfd
,
4318 1 << normal_align
, name
, 1 << common_align
);
4322 /* Remember the symbol size if it isn't undefined. */
4323 if ((isym
->st_size
!= 0 && isym
->st_shndx
!= SHN_UNDEF
)
4324 && (definition
|| h
->size
== 0))
4327 && h
->size
!= isym
->st_size
4328 && ! size_change_ok
)
4329 (*_bfd_error_handler
)
4330 (_("Warning: size of symbol `%s' changed"
4331 " from %lu in %B to %lu in %B"),
4333 name
, (unsigned long) h
->size
,
4334 (unsigned long) isym
->st_size
);
4336 h
->size
= isym
->st_size
;
4339 /* If this is a common symbol, then we always want H->SIZE
4340 to be the size of the common symbol. The code just above
4341 won't fix the size if a common symbol becomes larger. We
4342 don't warn about a size change here, because that is
4343 covered by --warn-common. Allow changed between different
4345 if (h
->root
.type
== bfd_link_hash_common
)
4346 h
->size
= h
->root
.u
.c
.size
;
4348 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
4349 && ((definition
&& !new_weak
)
4350 || (old_weak
&& h
->root
.type
== bfd_link_hash_common
)
4351 || h
->type
== STT_NOTYPE
))
4353 unsigned int type
= ELF_ST_TYPE (isym
->st_info
);
4355 /* Turn an IFUNC symbol from a DSO into a normal FUNC
4357 if (type
== STT_GNU_IFUNC
4358 && (abfd
->flags
& DYNAMIC
) != 0)
4361 if (h
->type
!= type
)
4363 if (h
->type
!= STT_NOTYPE
&& ! type_change_ok
)
4364 (*_bfd_error_handler
)
4365 (_("Warning: type of symbol `%s' changed"
4366 " from %d to %d in %B"),
4367 abfd
, name
, h
->type
, type
);
4373 /* Merge st_other field. */
4374 elf_merge_st_other (abfd
, h
, isym
, definition
, dynamic
);
4376 /* Set a flag in the hash table entry indicating the type of
4377 reference or definition we just found. Keep a count of
4378 the number of dynamic symbols we find. A dynamic symbol
4379 is one which is referenced or defined by both a regular
4380 object and a shared object. */
4387 if (bind
!= STB_WEAK
)
4388 h
->ref_regular_nonweak
= 1;
4400 /* If the indirect symbol has been forced local, don't
4401 make the real symbol dynamic. */
4402 if ((h
== hi
|| !hi
->forced_local
)
4403 && (! info
->executable
4413 hi
->ref_dynamic
= 1;
4419 hi
->def_dynamic
= 1;
4420 hi
->dynamic_def
= 1;
4423 /* If the indirect symbol has been forced local, don't
4424 make the real symbol dynamic. */
4425 if ((h
== hi
|| !hi
->forced_local
)
4428 || (h
->u
.weakdef
!= NULL
4430 && h
->u
.weakdef
->dynindx
!= -1)))
4434 /* We don't want to make debug symbol dynamic. */
4435 if (definition
&& (sec
->flags
& SEC_DEBUGGING
) && !info
->relocatable
)
4438 /* Nor should we make plugin symbols dynamic. */
4439 if ((abfd
->flags
& BFD_PLUGIN
) != 0)
4443 h
->target_internal
= isym
->st_target_internal
;
4445 /* Check to see if we need to add an indirect symbol for
4446 the default name. */
4447 if (definition
|| h
->root
.type
== bfd_link_hash_common
)
4448 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
4449 &sec
, &value
, &dynsym
,
4451 goto error_free_vers
;
4453 if (definition
&& !dynamic
)
4455 char *p
= strchr (name
, ELF_VER_CHR
);
4456 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
4458 /* Queue non-default versions so that .symver x, x@FOO
4459 aliases can be checked. */
4462 amt
= ((isymend
- isym
+ 1)
4463 * sizeof (struct elf_link_hash_entry
*));
4465 (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4467 goto error_free_vers
;
4469 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
4473 if (dynsym
&& h
->dynindx
== -1)
4475 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4476 goto error_free_vers
;
4477 if (h
->u
.weakdef
!= NULL
4479 && h
->u
.weakdef
->dynindx
== -1)
4481 if (!bfd_elf_link_record_dynamic_symbol (info
, h
->u
.weakdef
))
4482 goto error_free_vers
;
4485 else if (dynsym
&& h
->dynindx
!= -1)
4486 /* If the symbol already has a dynamic index, but
4487 visibility says it should not be visible, turn it into
4489 switch (ELF_ST_VISIBILITY (h
->other
))
4493 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4503 && (elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0
4504 && !on_needed_list (elf_dt_name (abfd
), htab
->needed
))))
4507 const char *soname
= elf_dt_name (abfd
);
4509 /* A symbol from a library loaded via DT_NEEDED of some
4510 other library is referenced by a regular object.
4511 Add a DT_NEEDED entry for it. Issue an error if
4512 --no-add-needed is used and the reference was not
4514 if (undef_bfd
!= NULL
4515 && (elf_dyn_lib_class (abfd
) & DYN_NO_NEEDED
) != 0)
4517 (*_bfd_error_handler
)
4518 (_("%B: undefined reference to symbol '%s'"),
4520 (*_bfd_error_handler
)
4521 (_("note: '%s' is defined in DSO %B so try adding it to the linker command line"),
4523 bfd_set_error (bfd_error_invalid_operation
);
4524 goto error_free_vers
;
4527 elf_dyn_lib_class (abfd
) = (enum dynamic_lib_link_class
)
4528 (elf_dyn_lib_class (abfd
) & ~DYN_AS_NEEDED
);
4531 ret
= elf_add_dt_needed_tag (abfd
, info
, soname
, add_needed
);
4533 goto error_free_vers
;
4535 BFD_ASSERT (ret
== 0);
4540 if (extversym
!= NULL
)
4546 if (isymbuf
!= NULL
)
4552 if ((elf_dyn_lib_class (abfd
) & DYN_AS_NEEDED
) != 0)
4556 /* Restore the symbol table. */
4557 if (bed
->as_needed_cleanup
)
4558 (*bed
->as_needed_cleanup
) (abfd
, info
);
4559 old_hash
= (char *) old_tab
+ tabsize
;
4560 old_ent
= (char *) old_hash
+ hashsize
;
4561 sym_hash
= elf_sym_hashes (abfd
);
4562 htab
->root
.table
.table
= old_table
;
4563 htab
->root
.table
.size
= old_size
;
4564 htab
->root
.table
.count
= old_count
;
4565 memcpy (htab
->root
.table
.table
, old_tab
, tabsize
);
4566 memcpy (sym_hash
, old_hash
, hashsize
);
4567 htab
->root
.undefs
= old_undefs
;
4568 htab
->root
.undefs_tail
= old_undefs_tail
;
4569 for (i
= 0; i
< htab
->root
.table
.size
; i
++)
4571 struct bfd_hash_entry
*p
;
4572 struct elf_link_hash_entry
*h
;
4574 unsigned int alignment_power
;
4576 for (p
= htab
->root
.table
.table
[i
]; p
!= NULL
; p
= p
->next
)
4578 h
= (struct elf_link_hash_entry
*) p
;
4579 if (h
->root
.type
== bfd_link_hash_warning
)
4580 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4581 if (h
->dynindx
>= old_dynsymcount
)
4582 _bfd_elf_strtab_delref (htab
->dynstr
, h
->dynstr_index
);
4584 /* Preserve the maximum alignment and size for common
4585 symbols even if this dynamic lib isn't on DT_NEEDED
4586 since it can still be loaded at the run-time by another
4588 if (h
->root
.type
== bfd_link_hash_common
)
4590 size
= h
->root
.u
.c
.size
;
4591 alignment_power
= h
->root
.u
.c
.p
->alignment_power
;
4596 alignment_power
= 0;
4598 memcpy (p
, old_ent
, htab
->root
.table
.entsize
);
4599 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4600 h
= (struct elf_link_hash_entry
*) p
;
4601 if (h
->root
.type
== bfd_link_hash_warning
)
4603 memcpy (h
->root
.u
.i
.link
, old_ent
, htab
->root
.table
.entsize
);
4604 old_ent
= (char *) old_ent
+ htab
->root
.table
.entsize
;
4606 else if (h
->root
.type
== bfd_link_hash_common
)
4608 if (size
> h
->root
.u
.c
.size
)
4609 h
->root
.u
.c
.size
= size
;
4610 if (alignment_power
> h
->root
.u
.c
.p
->alignment_power
)
4611 h
->root
.u
.c
.p
->alignment_power
= alignment_power
;
4616 /* Make a special call to the linker "notice" function to
4617 tell it that symbols added for crefs may need to be removed. */
4618 if (!(*info
->callbacks
->notice
) (info
, NULL
, abfd
, NULL
,
4619 notice_not_needed
, 0, NULL
))
4620 goto error_free_vers
;
4623 objalloc_free_block ((struct objalloc
*) htab
->root
.table
.memory
,
4625 if (nondeflt_vers
!= NULL
)
4626 free (nondeflt_vers
);
4630 if (old_tab
!= NULL
)
4632 if (!(*info
->callbacks
->notice
) (info
, NULL
, abfd
, NULL
,
4633 notice_needed
, 0, NULL
))
4634 goto error_free_vers
;
4639 /* Now that all the symbols from this input file are created, handle
4640 .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */
4641 if (nondeflt_vers
!= NULL
)
4643 bfd_size_type cnt
, symidx
;
4645 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
4647 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
4648 char *shortname
, *p
;
4650 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
4652 || (h
->root
.type
!= bfd_link_hash_defined
4653 && h
->root
.type
!= bfd_link_hash_defweak
))
4656 amt
= p
- h
->root
.root
.string
;
4657 shortname
= (char *) bfd_malloc (amt
+ 1);
4659 goto error_free_vers
;
4660 memcpy (shortname
, h
->root
.root
.string
, amt
);
4661 shortname
[amt
] = '\0';
4663 hi
= (struct elf_link_hash_entry
*)
4664 bfd_link_hash_lookup (&htab
->root
, shortname
,
4665 FALSE
, FALSE
, FALSE
);
4667 && hi
->root
.type
== h
->root
.type
4668 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
4669 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
4671 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
4672 hi
->root
.type
= bfd_link_hash_indirect
;
4673 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
4674 (*bed
->elf_backend_copy_indirect_symbol
) (info
, h
, hi
);
4675 sym_hash
= elf_sym_hashes (abfd
);
4677 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
4678 if (sym_hash
[symidx
] == hi
)
4680 sym_hash
[symidx
] = h
;
4686 free (nondeflt_vers
);
4687 nondeflt_vers
= NULL
;
4690 /* Now set the weakdefs field correctly for all the weak defined
4691 symbols we found. The only way to do this is to search all the
4692 symbols. Since we only need the information for non functions in
4693 dynamic objects, that's the only time we actually put anything on
4694 the list WEAKS. We need this information so that if a regular
4695 object refers to a symbol defined weakly in a dynamic object, the
4696 real symbol in the dynamic object is also put in the dynamic
4697 symbols; we also must arrange for both symbols to point to the
4698 same memory location. We could handle the general case of symbol
4699 aliasing, but a general symbol alias can only be generated in
4700 assembler code, handling it correctly would be very time
4701 consuming, and other ELF linkers don't handle general aliasing
4705 struct elf_link_hash_entry
**hpp
;
4706 struct elf_link_hash_entry
**hppend
;
4707 struct elf_link_hash_entry
**sorted_sym_hash
;
4708 struct elf_link_hash_entry
*h
;
4711 /* Since we have to search the whole symbol list for each weak
4712 defined symbol, search time for N weak defined symbols will be
4713 O(N^2). Binary search will cut it down to O(NlogN). */
4714 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
4715 sorted_sym_hash
= (struct elf_link_hash_entry
**) bfd_malloc (amt
);
4716 if (sorted_sym_hash
== NULL
)
4718 sym_hash
= sorted_sym_hash
;
4719 hpp
= elf_sym_hashes (abfd
);
4720 hppend
= hpp
+ extsymcount
;
4722 for (; hpp
< hppend
; hpp
++)
4726 && h
->root
.type
== bfd_link_hash_defined
4727 && !bed
->is_function_type (h
->type
))
4735 qsort (sorted_sym_hash
, sym_count
,
4736 sizeof (struct elf_link_hash_entry
*),
4739 while (weaks
!= NULL
)
4741 struct elf_link_hash_entry
*hlook
;
4747 weaks
= hlook
->u
.weakdef
;
4748 hlook
->u
.weakdef
= NULL
;
4750 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
4751 || hlook
->root
.type
== bfd_link_hash_defweak
4752 || hlook
->root
.type
== bfd_link_hash_common
4753 || hlook
->root
.type
== bfd_link_hash_indirect
);
4754 slook
= hlook
->root
.u
.def
.section
;
4755 vlook
= hlook
->root
.u
.def
.value
;
4761 bfd_signed_vma vdiff
;
4763 h
= sorted_sym_hash
[idx
];
4764 vdiff
= vlook
- h
->root
.u
.def
.value
;
4771 long sdiff
= slook
->id
- h
->root
.u
.def
.section
->id
;
4781 /* We didn't find a value/section match. */
4785 /* With multiple aliases, or when the weak symbol is already
4786 strongly defined, we have multiple matching symbols and
4787 the binary search above may land on any of them. Step
4788 one past the matching symbol(s). */
4791 h
= sorted_sym_hash
[idx
];
4792 if (h
->root
.u
.def
.section
!= slook
4793 || h
->root
.u
.def
.value
!= vlook
)
4797 /* Now look back over the aliases. Since we sorted by size
4798 as well as value and section, we'll choose the one with
4799 the largest size. */
4802 h
= sorted_sym_hash
[idx
];
4804 /* Stop if value or section doesn't match. */
4805 if (h
->root
.u
.def
.section
!= slook
4806 || h
->root
.u
.def
.value
!= vlook
)
4808 else if (h
!= hlook
)
4810 hlook
->u
.weakdef
= h
;
4812 /* If the weak definition is in the list of dynamic
4813 symbols, make sure the real definition is put
4815 if (hlook
->dynindx
!= -1 && h
->dynindx
== -1)
4817 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
4820 free (sorted_sym_hash
);
4825 /* If the real definition is in the list of dynamic
4826 symbols, make sure the weak definition is put
4827 there as well. If we don't do this, then the
4828 dynamic loader might not merge the entries for the
4829 real definition and the weak definition. */
4830 if (h
->dynindx
!= -1 && hlook
->dynindx
== -1)
4832 if (! bfd_elf_link_record_dynamic_symbol (info
, hlook
))
4833 goto err_free_sym_hash
;
4840 free (sorted_sym_hash
);
4843 if (bed
->check_directives
4844 && !(*bed
->check_directives
) (abfd
, info
))
4847 /* If this object is the same format as the output object, and it is
4848 not a shared library, then let the backend look through the
4851 This is required to build global offset table entries and to
4852 arrange for dynamic relocs. It is not required for the
4853 particular common case of linking non PIC code, even when linking
4854 against shared libraries, but unfortunately there is no way of
4855 knowing whether an object file has been compiled PIC or not.
4856 Looking through the relocs is not particularly time consuming.
4857 The problem is that we must either (1) keep the relocs in memory,
4858 which causes the linker to require additional runtime memory or
4859 (2) read the relocs twice from the input file, which wastes time.
4860 This would be a good case for using mmap.
4862 I have no idea how to handle linking PIC code into a file of a
4863 different format. It probably can't be done. */
4865 && is_elf_hash_table (htab
)
4866 && bed
->check_relocs
!= NULL
4867 && elf_object_id (abfd
) == elf_hash_table_id (htab
)
4868 && (*bed
->relocs_compatible
) (abfd
->xvec
, info
->output_bfd
->xvec
))
4872 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4874 Elf_Internal_Rela
*internal_relocs
;
4877 if ((o
->flags
& SEC_RELOC
) == 0
4878 || o
->reloc_count
== 0
4879 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
4880 && (o
->flags
& SEC_DEBUGGING
) != 0)
4881 || bfd_is_abs_section (o
->output_section
))
4884 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
4886 if (internal_relocs
== NULL
)
4889 ok
= (*bed
->check_relocs
) (abfd
, info
, o
, internal_relocs
);
4891 if (elf_section_data (o
)->relocs
!= internal_relocs
)
4892 free (internal_relocs
);
4899 /* If this is a non-traditional link, try to optimize the handling
4900 of the .stab/.stabstr sections. */
4902 && ! info
->traditional_format
4903 && is_elf_hash_table (htab
)
4904 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
4908 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
4909 if (stabstr
!= NULL
)
4911 bfd_size_type string_offset
= 0;
4914 for (stab
= abfd
->sections
; stab
; stab
= stab
->next
)
4915 if (CONST_STRNEQ (stab
->name
, ".stab")
4916 && (!stab
->name
[5] ||
4917 (stab
->name
[5] == '.' && ISDIGIT (stab
->name
[6])))
4918 && (stab
->flags
& SEC_MERGE
) == 0
4919 && !bfd_is_abs_section (stab
->output_section
))
4921 struct bfd_elf_section_data
*secdata
;
4923 secdata
= elf_section_data (stab
);
4924 if (! _bfd_link_section_stabs (abfd
, &htab
->stab_info
, stab
,
4925 stabstr
, &secdata
->sec_info
,
4928 if (secdata
->sec_info
)
4929 stab
->sec_info_type
= SEC_INFO_TYPE_STABS
;
4934 if (is_elf_hash_table (htab
) && add_needed
)
4936 /* Add this bfd to the loaded list. */
4937 struct elf_link_loaded_list
*n
;
4939 n
= (struct elf_link_loaded_list
*)
4940 bfd_alloc (abfd
, sizeof (struct elf_link_loaded_list
));
4944 n
->next
= htab
->loaded
;
4951 if (old_tab
!= NULL
)
4953 if (nondeflt_vers
!= NULL
)
4954 free (nondeflt_vers
);
4955 if (extversym
!= NULL
)
4958 if (isymbuf
!= NULL
)
4964 /* Return the linker hash table entry of a symbol that might be
4965 satisfied by an archive symbol. Return -1 on error. */
4967 struct elf_link_hash_entry
*
4968 _bfd_elf_archive_symbol_lookup (bfd
*abfd
,
4969 struct bfd_link_info
*info
,
4972 struct elf_link_hash_entry
*h
;
4976 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, FALSE
, FALSE
, TRUE
);
4980 /* If this is a default version (the name contains @@), look up the
4981 symbol again with only one `@' as well as without the version.
4982 The effect is that references to the symbol with and without the
4983 version will be matched by the default symbol in the archive. */
4985 p
= strchr (name
, ELF_VER_CHR
);
4986 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
4989 /* First check with only one `@'. */
4990 len
= strlen (name
);
4991 copy
= (char *) bfd_alloc (abfd
, len
);
4993 return (struct elf_link_hash_entry
*) 0 - 1;
4995 first
= p
- name
+ 1;
4996 memcpy (copy
, name
, first
);
4997 memcpy (copy
+ first
, name
+ first
+ 1, len
- first
);
4999 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
, FALSE
, FALSE
, TRUE
);
5002 /* We also need to check references to the symbol without the
5004 copy
[first
- 1] = '\0';
5005 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
5006 FALSE
, FALSE
, TRUE
);
5009 bfd_release (abfd
, copy
);
5013 /* Add symbols from an ELF archive file to the linker hash table. We
5014 don't use _bfd_generic_link_add_archive_symbols because of a
5015 problem which arises on UnixWare. The UnixWare libc.so is an
5016 archive which includes an entry libc.so.1 which defines a bunch of
5017 symbols. The libc.so archive also includes a number of other
5018 object files, which also define symbols, some of which are the same
5019 as those defined in libc.so.1. Correct linking requires that we
5020 consider each object file in turn, and include it if it defines any
5021 symbols we need. _bfd_generic_link_add_archive_symbols does not do
5022 this; it looks through the list of undefined symbols, and includes
5023 any object file which defines them. When this algorithm is used on
5024 UnixWare, it winds up pulling in libc.so.1 early and defining a
5025 bunch of symbols. This means that some of the other objects in the
5026 archive are not included in the link, which is incorrect since they
5027 precede libc.so.1 in the archive.
5029 Fortunately, ELF archive handling is simpler than that done by
5030 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
5031 oddities. In ELF, if we find a symbol in the archive map, and the
5032 symbol is currently undefined, we know that we must pull in that
5035 Unfortunately, we do have to make multiple passes over the symbol
5036 table until nothing further is resolved. */
5039 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5042 bfd_boolean
*defined
= NULL
;
5043 bfd_boolean
*included
= NULL
;
5047 const struct elf_backend_data
*bed
;
5048 struct elf_link_hash_entry
* (*archive_symbol_lookup
)
5049 (bfd
*, struct bfd_link_info
*, const char *);
5051 if (! bfd_has_map (abfd
))
5053 /* An empty archive is a special case. */
5054 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
5056 bfd_set_error (bfd_error_no_armap
);
5060 /* Keep track of all symbols we know to be already defined, and all
5061 files we know to be already included. This is to speed up the
5062 second and subsequent passes. */
5063 c
= bfd_ardata (abfd
)->symdef_count
;
5067 amt
*= sizeof (bfd_boolean
);
5068 defined
= (bfd_boolean
*) bfd_zmalloc (amt
);
5069 included
= (bfd_boolean
*) bfd_zmalloc (amt
);
5070 if (defined
== NULL
|| included
== NULL
)
5073 symdefs
= bfd_ardata (abfd
)->symdefs
;
5074 bed
= get_elf_backend_data (abfd
);
5075 archive_symbol_lookup
= bed
->elf_backend_archive_symbol_lookup
;
5088 symdefend
= symdef
+ c
;
5089 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
5091 struct elf_link_hash_entry
*h
;
5093 struct bfd_link_hash_entry
*undefs_tail
;
5096 if (defined
[i
] || included
[i
])
5098 if (symdef
->file_offset
== last
)
5104 h
= archive_symbol_lookup (abfd
, info
, symdef
->name
);
5105 if (h
== (struct elf_link_hash_entry
*) 0 - 1)
5111 if (h
->root
.type
== bfd_link_hash_common
)
5113 /* We currently have a common symbol. The archive map contains
5114 a reference to this symbol, so we may want to include it. We
5115 only want to include it however, if this archive element
5116 contains a definition of the symbol, not just another common
5119 Unfortunately some archivers (including GNU ar) will put
5120 declarations of common symbols into their archive maps, as
5121 well as real definitions, so we cannot just go by the archive
5122 map alone. Instead we must read in the element's symbol
5123 table and check that to see what kind of symbol definition
5125 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
5128 else if (h
->root
.type
!= bfd_link_hash_undefined
)
5130 if (h
->root
.type
!= bfd_link_hash_undefweak
)
5135 /* We need to include this archive member. */
5136 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
5137 if (element
== NULL
)
5140 if (! bfd_check_format (element
, bfd_object
))
5143 /* Doublecheck that we have not included this object
5144 already--it should be impossible, but there may be
5145 something wrong with the archive. */
5146 if (element
->archive_pass
!= 0)
5148 bfd_set_error (bfd_error_bad_value
);
5151 element
->archive_pass
= 1;
5153 undefs_tail
= info
->hash
->undefs_tail
;
5155 if (!(*info
->callbacks
5156 ->add_archive_element
) (info
, element
, symdef
->name
, &element
))
5158 if (!bfd_link_add_symbols (element
, info
))
5161 /* If there are any new undefined symbols, we need to make
5162 another pass through the archive in order to see whether
5163 they can be defined. FIXME: This isn't perfect, because
5164 common symbols wind up on undefs_tail and because an
5165 undefined symbol which is defined later on in this pass
5166 does not require another pass. This isn't a bug, but it
5167 does make the code less efficient than it could be. */
5168 if (undefs_tail
!= info
->hash
->undefs_tail
)
5171 /* Look backward to mark all symbols from this object file
5172 which we have already seen in this pass. */
5176 included
[mark
] = TRUE
;
5181 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
5183 /* We mark subsequent symbols from this object file as we go
5184 on through the loop. */
5185 last
= symdef
->file_offset
;
5196 if (defined
!= NULL
)
5198 if (included
!= NULL
)
5203 /* Given an ELF BFD, add symbols to the global hash table as
5207 bfd_elf_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
5209 switch (bfd_get_format (abfd
))
5212 return elf_link_add_object_symbols (abfd
, info
);
5214 return elf_link_add_archive_symbols (abfd
, info
);
5216 bfd_set_error (bfd_error_wrong_format
);
5221 struct hash_codes_info
5223 unsigned long *hashcodes
;
5227 /* This function will be called though elf_link_hash_traverse to store
5228 all hash value of the exported symbols in an array. */
5231 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5233 struct hash_codes_info
*inf
= (struct hash_codes_info
*) data
;
5239 /* Ignore indirect symbols. These are added by the versioning code. */
5240 if (h
->dynindx
== -1)
5243 name
= h
->root
.root
.string
;
5244 p
= strchr (name
, ELF_VER_CHR
);
5247 alc
= (char *) bfd_malloc (p
- name
+ 1);
5253 memcpy (alc
, name
, p
- name
);
5254 alc
[p
- name
] = '\0';
5258 /* Compute the hash value. */
5259 ha
= bfd_elf_hash (name
);
5261 /* Store the found hash value in the array given as the argument. */
5262 *(inf
->hashcodes
)++ = ha
;
5264 /* And store it in the struct so that we can put it in the hash table
5266 h
->u
.elf_hash_value
= ha
;
5274 struct collect_gnu_hash_codes
5277 const struct elf_backend_data
*bed
;
5278 unsigned long int nsyms
;
5279 unsigned long int maskbits
;
5280 unsigned long int *hashcodes
;
5281 unsigned long int *hashval
;
5282 unsigned long int *indx
;
5283 unsigned long int *counts
;
5286 long int min_dynindx
;
5287 unsigned long int bucketcount
;
5288 unsigned long int symindx
;
5289 long int local_indx
;
5290 long int shift1
, shift2
;
5291 unsigned long int mask
;
5295 /* This function will be called though elf_link_hash_traverse to store
5296 all hash value of the exported symbols in an array. */
5299 elf_collect_gnu_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
5301 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5307 /* Ignore indirect symbols. These are added by the versioning code. */
5308 if (h
->dynindx
== -1)
5311 /* Ignore also local symbols and undefined symbols. */
5312 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5315 name
= h
->root
.root
.string
;
5316 p
= strchr (name
, ELF_VER_CHR
);
5319 alc
= (char *) bfd_malloc (p
- name
+ 1);
5325 memcpy (alc
, name
, p
- name
);
5326 alc
[p
- name
] = '\0';
5330 /* Compute the hash value. */
5331 ha
= bfd_elf_gnu_hash (name
);
5333 /* Store the found hash value in the array for compute_bucket_count,
5334 and also for .dynsym reordering purposes. */
5335 s
->hashcodes
[s
->nsyms
] = ha
;
5336 s
->hashval
[h
->dynindx
] = ha
;
5338 if (s
->min_dynindx
< 0 || s
->min_dynindx
> h
->dynindx
)
5339 s
->min_dynindx
= h
->dynindx
;
5347 /* This function will be called though elf_link_hash_traverse to do
5348 final dynaminc symbol renumbering. */
5351 elf_renumber_gnu_hash_syms (struct elf_link_hash_entry
*h
, void *data
)
5353 struct collect_gnu_hash_codes
*s
= (struct collect_gnu_hash_codes
*) data
;
5354 unsigned long int bucket
;
5355 unsigned long int val
;
5357 /* Ignore indirect symbols. */
5358 if (h
->dynindx
== -1)
5361 /* Ignore also local symbols and undefined symbols. */
5362 if (! (*s
->bed
->elf_hash_symbol
) (h
))
5364 if (h
->dynindx
>= s
->min_dynindx
)
5365 h
->dynindx
= s
->local_indx
++;
5369 bucket
= s
->hashval
[h
->dynindx
] % s
->bucketcount
;
5370 val
= (s
->hashval
[h
->dynindx
] >> s
->shift1
)
5371 & ((s
->maskbits
>> s
->shift1
) - 1);
5372 s
->bitmask
[val
] |= ((bfd_vma
) 1) << (s
->hashval
[h
->dynindx
] & s
->mask
);
5374 |= ((bfd_vma
) 1) << ((s
->hashval
[h
->dynindx
] >> s
->shift2
) & s
->mask
);
5375 val
= s
->hashval
[h
->dynindx
] & ~(unsigned long int) 1;
5376 if (s
->counts
[bucket
] == 1)
5377 /* Last element terminates the chain. */
5379 bfd_put_32 (s
->output_bfd
, val
,
5380 s
->contents
+ (s
->indx
[bucket
] - s
->symindx
) * 4);
5381 --s
->counts
[bucket
];
5382 h
->dynindx
= s
->indx
[bucket
]++;
5386 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5389 _bfd_elf_hash_symbol (struct elf_link_hash_entry
*h
)
5391 return !(h
->forced_local
5392 || h
->root
.type
== bfd_link_hash_undefined
5393 || h
->root
.type
== bfd_link_hash_undefweak
5394 || ((h
->root
.type
== bfd_link_hash_defined
5395 || h
->root
.type
== bfd_link_hash_defweak
)
5396 && h
->root
.u
.def
.section
->output_section
== NULL
));
5399 /* Array used to determine the number of hash table buckets to use
5400 based on the number of symbols there are. If there are fewer than
5401 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
5402 fewer than 37 we use 17 buckets, and so forth. We never use more
5403 than 32771 buckets. */
5405 static const size_t elf_buckets
[] =
5407 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
5411 /* Compute bucket count for hashing table. We do not use a static set
5412 of possible tables sizes anymore. Instead we determine for all
5413 possible reasonable sizes of the table the outcome (i.e., the
5414 number of collisions etc) and choose the best solution. The
5415 weighting functions are not too simple to allow the table to grow
5416 without bounds. Instead one of the weighting factors is the size.
5417 Therefore the result is always a good payoff between few collisions
5418 (= short chain lengths) and table size. */
5420 compute_bucket_count (struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
5421 unsigned long int *hashcodes ATTRIBUTE_UNUSED
,
5422 unsigned long int nsyms
,
5425 size_t best_size
= 0;
5426 unsigned long int i
;
5428 /* We have a problem here. The following code to optimize the table
5429 size requires an integer type with more the 32 bits. If
5430 BFD_HOST_U_64_BIT is set we know about such a type. */
5431 #ifdef BFD_HOST_U_64_BIT
5436 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
5437 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
5438 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
5439 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
5440 unsigned long int *counts
;
5442 unsigned int no_improvement_count
= 0;
5444 /* Possible optimization parameters: if we have NSYMS symbols we say
5445 that the hashing table must at least have NSYMS/4 and at most
5447 minsize
= nsyms
/ 4;
5450 best_size
= maxsize
= nsyms
* 2;
5455 if ((best_size
& 31) == 0)
5459 /* Create array where we count the collisions in. We must use bfd_malloc
5460 since the size could be large. */
5462 amt
*= sizeof (unsigned long int);
5463 counts
= (unsigned long int *) bfd_malloc (amt
);
5467 /* Compute the "optimal" size for the hash table. The criteria is a
5468 minimal chain length. The minor criteria is (of course) the size
5470 for (i
= minsize
; i
< maxsize
; ++i
)
5472 /* Walk through the array of hashcodes and count the collisions. */
5473 BFD_HOST_U_64_BIT max
;
5474 unsigned long int j
;
5475 unsigned long int fact
;
5477 if (gnu_hash
&& (i
& 31) == 0)
5480 memset (counts
, '\0', i
* sizeof (unsigned long int));
5482 /* Determine how often each hash bucket is used. */
5483 for (j
= 0; j
< nsyms
; ++j
)
5484 ++counts
[hashcodes
[j
] % i
];
5486 /* For the weight function we need some information about the
5487 pagesize on the target. This is information need not be 100%
5488 accurate. Since this information is not available (so far) we
5489 define it here to a reasonable default value. If it is crucial
5490 to have a better value some day simply define this value. */
5491 # ifndef BFD_TARGET_PAGESIZE
5492 # define BFD_TARGET_PAGESIZE (4096)
5495 /* We in any case need 2 + DYNSYMCOUNT entries for the size values
5497 max
= (2 + dynsymcount
) * bed
->s
->sizeof_hash_entry
;
5500 /* Variant 1: optimize for short chains. We add the squares
5501 of all the chain lengths (which favors many small chain
5502 over a few long chains). */
5503 for (j
= 0; j
< i
; ++j
)
5504 max
+= counts
[j
] * counts
[j
];
5506 /* This adds penalties for the overall size of the table. */
5507 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5510 /* Variant 2: Optimize a lot more for small table. Here we
5511 also add squares of the size but we also add penalties for
5512 empty slots (the +1 term). */
5513 for (j
= 0; j
< i
; ++j
)
5514 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
5516 /* The overall size of the table is considered, but not as
5517 strong as in variant 1, where it is squared. */
5518 fact
= i
/ (BFD_TARGET_PAGESIZE
/ bed
->s
->sizeof_hash_entry
) + 1;
5522 /* Compare with current best results. */
5523 if (max
< best_chlen
)
5527 no_improvement_count
= 0;
5529 /* PR 11843: Avoid futile long searches for the best bucket size
5530 when there are a large number of symbols. */
5531 else if (++no_improvement_count
== 100)
5538 #endif /* defined (BFD_HOST_U_64_BIT) */
5540 /* This is the fallback solution if no 64bit type is available or if we
5541 are not supposed to spend much time on optimizations. We select the
5542 bucket count using a fixed set of numbers. */
5543 for (i
= 0; elf_buckets
[i
] != 0; i
++)
5545 best_size
= elf_buckets
[i
];
5546 if (nsyms
< elf_buckets
[i
+ 1])
5549 if (gnu_hash
&& best_size
< 2)
5556 /* Size any SHT_GROUP section for ld -r. */
5559 _bfd_elf_size_group_sections (struct bfd_link_info
*info
)
5563 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
5564 if (bfd_get_flavour (ibfd
) == bfd_target_elf_flavour
5565 && !_bfd_elf_fixup_group_sections (ibfd
, bfd_abs_section_ptr
))
5570 /* Set up the sizes and contents of the ELF dynamic sections. This is
5571 called by the ELF linker emulation before_allocation routine. We
5572 must set the sizes of the sections before the linker sets the
5573 addresses of the various sections. */
5576 bfd_elf_size_dynamic_sections (bfd
*output_bfd
,
5579 const char *filter_shlib
,
5581 const char *depaudit
,
5582 const char * const *auxiliary_filters
,
5583 struct bfd_link_info
*info
,
5584 asection
**sinterpptr
)
5586 bfd_size_type soname_indx
;
5588 const struct elf_backend_data
*bed
;
5589 struct elf_info_failed asvinfo
;
5593 soname_indx
= (bfd_size_type
) -1;
5595 if (!is_elf_hash_table (info
->hash
))
5598 bed
= get_elf_backend_data (output_bfd
);
5599 if (info
->execstack
)
5600 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
| PF_X
;
5601 else if (info
->noexecstack
)
5602 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
;
5606 asection
*notesec
= NULL
;
5609 for (inputobj
= info
->input_bfds
;
5611 inputobj
= inputobj
->link_next
)
5616 & (DYNAMIC
| EXEC_P
| BFD_PLUGIN
| BFD_LINKER_CREATED
))
5618 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
5621 if (s
->flags
& SEC_CODE
)
5625 else if (bed
->default_execstack
)
5630 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
| exec
;
5631 if (exec
&& info
->relocatable
5632 && notesec
->output_section
!= bfd_abs_section_ptr
)
5633 notesec
->output_section
->flags
|= SEC_CODE
;
5637 /* Any syms created from now on start with -1 in
5638 got.refcount/offset and plt.refcount/offset. */
5639 elf_hash_table (info
)->init_got_refcount
5640 = elf_hash_table (info
)->init_got_offset
;
5641 elf_hash_table (info
)->init_plt_refcount
5642 = elf_hash_table (info
)->init_plt_offset
;
5644 if (info
->relocatable
5645 && !_bfd_elf_size_group_sections (info
))
5648 /* The backend may have to create some sections regardless of whether
5649 we're dynamic or not. */
5650 if (bed
->elf_backend_always_size_sections
5651 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
5654 dynobj
= elf_hash_table (info
)->dynobj
;
5656 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5658 struct elf_info_failed eif
;
5659 struct elf_link_hash_entry
*h
;
5661 struct bfd_elf_version_tree
*t
;
5662 struct bfd_elf_version_expr
*d
;
5664 bfd_boolean all_defined
;
5666 *sinterpptr
= bfd_get_linker_section (dynobj
, ".interp");
5667 BFD_ASSERT (*sinterpptr
!= NULL
|| !info
->executable
);
5671 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5673 if (soname_indx
== (bfd_size_type
) -1
5674 || !_bfd_elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
5680 if (!_bfd_elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
5682 info
->flags
|= DF_SYMBOLIC
;
5689 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
5691 if (indx
== (bfd_size_type
) -1
5692 || !_bfd_elf_add_dynamic_entry (info
, DT_RPATH
, indx
))
5695 if (info
->new_dtags
)
5697 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
, indx
);
5698 if (!_bfd_elf_add_dynamic_entry (info
, DT_RUNPATH
, indx
))
5703 if (filter_shlib
!= NULL
)
5707 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5708 filter_shlib
, TRUE
);
5709 if (indx
== (bfd_size_type
) -1
5710 || !_bfd_elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
5714 if (auxiliary_filters
!= NULL
)
5716 const char * const *p
;
5718 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
5722 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
5724 if (indx
== (bfd_size_type
) -1
5725 || !_bfd_elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
5734 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, audit
,
5736 if (indx
== (bfd_size_type
) -1
5737 || !_bfd_elf_add_dynamic_entry (info
, DT_AUDIT
, indx
))
5741 if (depaudit
!= NULL
)
5745 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, depaudit
,
5747 if (indx
== (bfd_size_type
) -1
5748 || !_bfd_elf_add_dynamic_entry (info
, DT_DEPAUDIT
, indx
))
5755 /* If we are supposed to export all symbols into the dynamic symbol
5756 table (this is not the normal case), then do so. */
5757 if (info
->export_dynamic
5758 || (info
->executable
&& info
->dynamic
))
5760 elf_link_hash_traverse (elf_hash_table (info
),
5761 _bfd_elf_export_symbol
,
5767 /* Make all global versions with definition. */
5768 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5769 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5770 if (!d
->symver
&& d
->literal
)
5772 const char *verstr
, *name
;
5773 size_t namelen
, verlen
, newlen
;
5774 char *newname
, *p
, leading_char
;
5775 struct elf_link_hash_entry
*newh
;
5777 leading_char
= bfd_get_symbol_leading_char (output_bfd
);
5779 namelen
= strlen (name
) + (leading_char
!= '\0');
5781 verlen
= strlen (verstr
);
5782 newlen
= namelen
+ verlen
+ 3;
5784 newname
= (char *) bfd_malloc (newlen
);
5785 if (newname
== NULL
)
5787 newname
[0] = leading_char
;
5788 memcpy (newname
+ (leading_char
!= '\0'), name
, namelen
);
5790 /* Check the hidden versioned definition. */
5791 p
= newname
+ namelen
;
5793 memcpy (p
, verstr
, verlen
+ 1);
5794 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5795 newname
, FALSE
, FALSE
,
5798 || (newh
->root
.type
!= bfd_link_hash_defined
5799 && newh
->root
.type
!= bfd_link_hash_defweak
))
5801 /* Check the default versioned definition. */
5803 memcpy (p
, verstr
, verlen
+ 1);
5804 newh
= elf_link_hash_lookup (elf_hash_table (info
),
5805 newname
, FALSE
, FALSE
,
5810 /* Mark this version if there is a definition and it is
5811 not defined in a shared object. */
5813 && !newh
->def_dynamic
5814 && (newh
->root
.type
== bfd_link_hash_defined
5815 || newh
->root
.type
== bfd_link_hash_defweak
))
5819 /* Attach all the symbols to their version information. */
5820 asvinfo
.info
= info
;
5821 asvinfo
.failed
= FALSE
;
5823 elf_link_hash_traverse (elf_hash_table (info
),
5824 _bfd_elf_link_assign_sym_version
,
5829 if (!info
->allow_undefined_version
)
5831 /* Check if all global versions have a definition. */
5833 for (t
= info
->version_info
; t
!= NULL
; t
= t
->next
)
5834 for (d
= t
->globals
.list
; d
!= NULL
; d
= d
->next
)
5835 if (d
->literal
&& !d
->symver
&& !d
->script
)
5837 (*_bfd_error_handler
)
5838 (_("%s: undefined version: %s"),
5839 d
->pattern
, t
->name
);
5840 all_defined
= FALSE
;
5845 bfd_set_error (bfd_error_bad_value
);
5850 /* Find all symbols which were defined in a dynamic object and make
5851 the backend pick a reasonable value for them. */
5852 elf_link_hash_traverse (elf_hash_table (info
),
5853 _bfd_elf_adjust_dynamic_symbol
,
5858 /* Add some entries to the .dynamic section. We fill in some of the
5859 values later, in bfd_elf_final_link, but we must add the entries
5860 now so that we know the final size of the .dynamic section. */
5862 /* If there are initialization and/or finalization functions to
5863 call then add the corresponding DT_INIT/DT_FINI entries. */
5864 h
= (info
->init_function
5865 ? elf_link_hash_lookup (elf_hash_table (info
),
5866 info
->init_function
, FALSE
,
5873 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT
, 0))
5876 h
= (info
->fini_function
5877 ? elf_link_hash_lookup (elf_hash_table (info
),
5878 info
->fini_function
, FALSE
,
5885 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI
, 0))
5889 s
= bfd_get_section_by_name (output_bfd
, ".preinit_array");
5890 if (s
!= NULL
&& s
->linker_has_input
)
5892 /* DT_PREINIT_ARRAY is not allowed in shared library. */
5893 if (! info
->executable
)
5898 for (sub
= info
->input_bfds
; sub
!= NULL
;
5899 sub
= sub
->link_next
)
5900 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
)
5901 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5902 if (elf_section_data (o
)->this_hdr
.sh_type
5903 == SHT_PREINIT_ARRAY
)
5905 (*_bfd_error_handler
)
5906 (_("%B: .preinit_array section is not allowed in DSO"),
5911 bfd_set_error (bfd_error_nonrepresentable_section
);
5915 if (!_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
5916 || !_bfd_elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
5919 s
= bfd_get_section_by_name (output_bfd
, ".init_array");
5920 if (s
!= NULL
&& s
->linker_has_input
)
5922 if (!_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
5923 || !_bfd_elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
5926 s
= bfd_get_section_by_name (output_bfd
, ".fini_array");
5927 if (s
!= NULL
&& s
->linker_has_input
)
5929 if (!_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
5930 || !_bfd_elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
5934 dynstr
= bfd_get_linker_section (dynobj
, ".dynstr");
5935 /* If .dynstr is excluded from the link, we don't want any of
5936 these tags. Strictly, we should be checking each section
5937 individually; This quick check covers for the case where
5938 someone does a /DISCARD/ : { *(*) }. */
5939 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
5941 bfd_size_type strsize
;
5943 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
5944 if ((info
->emit_hash
5945 && !_bfd_elf_add_dynamic_entry (info
, DT_HASH
, 0))
5946 || (info
->emit_gnu_hash
5947 && !_bfd_elf_add_dynamic_entry (info
, DT_GNU_HASH
, 0))
5948 || !_bfd_elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
5949 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
5950 || !_bfd_elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
5951 || !_bfd_elf_add_dynamic_entry (info
, DT_SYMENT
,
5952 bed
->s
->sizeof_sym
))
5957 /* The backend must work out the sizes of all the other dynamic
5960 && bed
->elf_backend_size_dynamic_sections
!= NULL
5961 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
5964 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
5967 if (dynobj
!= NULL
&& elf_hash_table (info
)->dynamic_sections_created
)
5969 unsigned long section_sym_count
;
5970 struct bfd_elf_version_tree
*verdefs
;
5973 /* Set up the version definition section. */
5974 s
= bfd_get_linker_section (dynobj
, ".gnu.version_d");
5975 BFD_ASSERT (s
!= NULL
);
5977 /* We may have created additional version definitions if we are
5978 just linking a regular application. */
5979 verdefs
= info
->version_info
;
5981 /* Skip anonymous version tag. */
5982 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
5983 verdefs
= verdefs
->next
;
5985 if (verdefs
== NULL
&& !info
->create_default_symver
)
5986 s
->flags
|= SEC_EXCLUDE
;
5991 struct bfd_elf_version_tree
*t
;
5993 Elf_Internal_Verdef def
;
5994 Elf_Internal_Verdaux defaux
;
5995 struct bfd_link_hash_entry
*bh
;
5996 struct elf_link_hash_entry
*h
;
6002 /* Make space for the base version. */
6003 size
+= sizeof (Elf_External_Verdef
);
6004 size
+= sizeof (Elf_External_Verdaux
);
6007 /* Make space for the default version. */
6008 if (info
->create_default_symver
)
6010 size
+= sizeof (Elf_External_Verdef
);
6014 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6016 struct bfd_elf_version_deps
*n
;
6018 /* Don't emit base version twice. */
6022 size
+= sizeof (Elf_External_Verdef
);
6023 size
+= sizeof (Elf_External_Verdaux
);
6026 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6027 size
+= sizeof (Elf_External_Verdaux
);
6031 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6032 if (s
->contents
== NULL
&& s
->size
!= 0)
6035 /* Fill in the version definition section. */
6039 def
.vd_version
= VER_DEF_CURRENT
;
6040 def
.vd_flags
= VER_FLG_BASE
;
6043 if (info
->create_default_symver
)
6045 def
.vd_aux
= 2 * sizeof (Elf_External_Verdef
);
6046 def
.vd_next
= sizeof (Elf_External_Verdef
);
6050 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6051 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6052 + sizeof (Elf_External_Verdaux
));
6055 if (soname_indx
!= (bfd_size_type
) -1)
6057 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6059 def
.vd_hash
= bfd_elf_hash (soname
);
6060 defaux
.vda_name
= soname_indx
;
6067 name
= lbasename (output_bfd
->filename
);
6068 def
.vd_hash
= bfd_elf_hash (name
);
6069 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6071 if (indx
== (bfd_size_type
) -1)
6073 defaux
.vda_name
= indx
;
6075 defaux
.vda_next
= 0;
6077 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6078 (Elf_External_Verdef
*) p
);
6079 p
+= sizeof (Elf_External_Verdef
);
6080 if (info
->create_default_symver
)
6082 /* Add a symbol representing this version. */
6084 if (! (_bfd_generic_link_add_one_symbol
6085 (info
, dynobj
, name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6087 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6089 h
= (struct elf_link_hash_entry
*) bh
;
6092 h
->type
= STT_OBJECT
;
6093 h
->verinfo
.vertree
= NULL
;
6095 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6098 /* Create a duplicate of the base version with the same
6099 aux block, but different flags. */
6102 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6104 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6105 + sizeof (Elf_External_Verdaux
));
6108 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6109 (Elf_External_Verdef
*) p
);
6110 p
+= sizeof (Elf_External_Verdef
);
6112 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6113 (Elf_External_Verdaux
*) p
);
6114 p
+= sizeof (Elf_External_Verdaux
);
6116 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
6119 struct bfd_elf_version_deps
*n
;
6121 /* Don't emit the base version twice. */
6126 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6129 /* Add a symbol representing this version. */
6131 if (! (_bfd_generic_link_add_one_symbol
6132 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
6134 get_elf_backend_data (dynobj
)->collect
, &bh
)))
6136 h
= (struct elf_link_hash_entry
*) bh
;
6139 h
->type
= STT_OBJECT
;
6140 h
->verinfo
.vertree
= t
;
6142 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
6145 def
.vd_version
= VER_DEF_CURRENT
;
6147 if (t
->globals
.list
== NULL
6148 && t
->locals
.list
== NULL
6150 def
.vd_flags
|= VER_FLG_WEAK
;
6151 def
.vd_ndx
= t
->vernum
+ (info
->create_default_symver
? 2 : 1);
6152 def
.vd_cnt
= cdeps
+ 1;
6153 def
.vd_hash
= bfd_elf_hash (t
->name
);
6154 def
.vd_aux
= sizeof (Elf_External_Verdef
);
6157 /* If a basever node is next, it *must* be the last node in
6158 the chain, otherwise Verdef construction breaks. */
6159 if (t
->next
!= NULL
&& t
->next
->vernum
== 0)
6160 BFD_ASSERT (t
->next
->next
== NULL
);
6162 if (t
->next
!= NULL
&& t
->next
->vernum
!= 0)
6163 def
.vd_next
= (sizeof (Elf_External_Verdef
)
6164 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
6166 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
6167 (Elf_External_Verdef
*) p
);
6168 p
+= sizeof (Elf_External_Verdef
);
6170 defaux
.vda_name
= h
->dynstr_index
;
6171 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6173 defaux
.vda_next
= 0;
6174 if (t
->deps
!= NULL
)
6175 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6176 t
->name_indx
= defaux
.vda_name
;
6178 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6179 (Elf_External_Verdaux
*) p
);
6180 p
+= sizeof (Elf_External_Verdaux
);
6182 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
6184 if (n
->version_needed
== NULL
)
6186 /* This can happen if there was an error in the
6188 defaux
.vda_name
= 0;
6192 defaux
.vda_name
= n
->version_needed
->name_indx
;
6193 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
6196 if (n
->next
== NULL
)
6197 defaux
.vda_next
= 0;
6199 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
6201 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
6202 (Elf_External_Verdaux
*) p
);
6203 p
+= sizeof (Elf_External_Verdaux
);
6207 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
6208 || !_bfd_elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
6211 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
6214 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
6216 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
6219 else if (info
->flags
& DF_BIND_NOW
)
6221 if (!_bfd_elf_add_dynamic_entry (info
, DT_BIND_NOW
, 0))
6227 if (info
->executable
)
6228 info
->flags_1
&= ~ (DF_1_INITFIRST
6231 if (!_bfd_elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
6235 /* Work out the size of the version reference section. */
6237 s
= bfd_get_linker_section (dynobj
, ".gnu.version_r");
6238 BFD_ASSERT (s
!= NULL
);
6240 struct elf_find_verdep_info sinfo
;
6243 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
6244 if (sinfo
.vers
== 0)
6246 sinfo
.failed
= FALSE
;
6248 elf_link_hash_traverse (elf_hash_table (info
),
6249 _bfd_elf_link_find_version_dependencies
,
6254 if (elf_tdata (output_bfd
)->verref
== NULL
)
6255 s
->flags
|= SEC_EXCLUDE
;
6258 Elf_Internal_Verneed
*t
;
6263 /* Build the version dependency section. */
6266 for (t
= elf_tdata (output_bfd
)->verref
;
6270 Elf_Internal_Vernaux
*a
;
6272 size
+= sizeof (Elf_External_Verneed
);
6274 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6275 size
+= sizeof (Elf_External_Vernaux
);
6279 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6280 if (s
->contents
== NULL
)
6284 for (t
= elf_tdata (output_bfd
)->verref
;
6289 Elf_Internal_Vernaux
*a
;
6293 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6296 t
->vn_version
= VER_NEED_CURRENT
;
6298 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6299 elf_dt_name (t
->vn_bfd
) != NULL
6300 ? elf_dt_name (t
->vn_bfd
)
6301 : lbasename (t
->vn_bfd
->filename
),
6303 if (indx
== (bfd_size_type
) -1)
6306 t
->vn_aux
= sizeof (Elf_External_Verneed
);
6307 if (t
->vn_nextref
== NULL
)
6310 t
->vn_next
= (sizeof (Elf_External_Verneed
)
6311 + caux
* sizeof (Elf_External_Vernaux
));
6313 _bfd_elf_swap_verneed_out (output_bfd
, t
,
6314 (Elf_External_Verneed
*) p
);
6315 p
+= sizeof (Elf_External_Verneed
);
6317 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
6319 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
6320 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
6321 a
->vna_nodename
, FALSE
);
6322 if (indx
== (bfd_size_type
) -1)
6325 if (a
->vna_nextptr
== NULL
)
6328 a
->vna_next
= sizeof (Elf_External_Vernaux
);
6330 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
6331 (Elf_External_Vernaux
*) p
);
6332 p
+= sizeof (Elf_External_Vernaux
);
6336 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
6337 || !_bfd_elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
6340 elf_tdata (output_bfd
)->cverrefs
= crefs
;
6344 if ((elf_tdata (output_bfd
)->cverrefs
== 0
6345 && elf_tdata (output_bfd
)->cverdefs
== 0)
6346 || _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6347 §ion_sym_count
) == 0)
6349 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6350 s
->flags
|= SEC_EXCLUDE
;
6356 /* Find the first non-excluded output section. We'll use its
6357 section symbol for some emitted relocs. */
6359 _bfd_elf_init_1_index_section (bfd
*output_bfd
, struct bfd_link_info
*info
)
6363 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6364 if ((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
)) == SEC_ALLOC
6365 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6367 elf_hash_table (info
)->text_index_section
= s
;
6372 /* Find two non-excluded output sections, one for code, one for data.
6373 We'll use their section symbols for some emitted relocs. */
6375 _bfd_elf_init_2_index_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
6379 /* Data first, since setting text_index_section changes
6380 _bfd_elf_link_omit_section_dynsym. */
6381 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6382 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
)) == SEC_ALLOC
)
6383 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6385 elf_hash_table (info
)->data_index_section
= s
;
6389 for (s
= output_bfd
->sections
; s
!= NULL
; s
= s
->next
)
6390 if (((s
->flags
& (SEC_EXCLUDE
| SEC_ALLOC
| SEC_READONLY
))
6391 == (SEC_ALLOC
| SEC_READONLY
))
6392 && !_bfd_elf_link_omit_section_dynsym (output_bfd
, info
, s
))
6394 elf_hash_table (info
)->text_index_section
= s
;
6398 if (elf_hash_table (info
)->text_index_section
== NULL
)
6399 elf_hash_table (info
)->text_index_section
6400 = elf_hash_table (info
)->data_index_section
;
6404 bfd_elf_size_dynsym_hash_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
6406 const struct elf_backend_data
*bed
;
6408 if (!is_elf_hash_table (info
->hash
))
6411 bed
= get_elf_backend_data (output_bfd
);
6412 (*bed
->elf_backend_init_index_section
) (output_bfd
, info
);
6414 if (elf_hash_table (info
)->dynamic_sections_created
)
6418 bfd_size_type dynsymcount
;
6419 unsigned long section_sym_count
;
6420 unsigned int dtagcount
;
6422 dynobj
= elf_hash_table (info
)->dynobj
;
6424 /* Assign dynsym indicies. In a shared library we generate a
6425 section symbol for each output section, which come first.
6426 Next come all of the back-end allocated local dynamic syms,
6427 followed by the rest of the global symbols. */
6429 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
,
6430 §ion_sym_count
);
6432 /* Work out the size of the symbol version section. */
6433 s
= bfd_get_linker_section (dynobj
, ".gnu.version");
6434 BFD_ASSERT (s
!= NULL
);
6435 if (dynsymcount
!= 0
6436 && (s
->flags
& SEC_EXCLUDE
) == 0)
6438 s
->size
= dynsymcount
* sizeof (Elf_External_Versym
);
6439 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6440 if (s
->contents
== NULL
)
6443 if (!_bfd_elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
6447 /* Set the size of the .dynsym and .hash sections. We counted
6448 the number of dynamic symbols in elf_link_add_object_symbols.
6449 We will build the contents of .dynsym and .hash when we build
6450 the final symbol table, because until then we do not know the
6451 correct value to give the symbols. We built the .dynstr
6452 section as we went along in elf_link_add_object_symbols. */
6453 s
= bfd_get_linker_section (dynobj
, ".dynsym");
6454 BFD_ASSERT (s
!= NULL
);
6455 s
->size
= dynsymcount
* bed
->s
->sizeof_sym
;
6457 if (dynsymcount
!= 0)
6459 s
->contents
= (unsigned char *) bfd_alloc (output_bfd
, s
->size
);
6460 if (s
->contents
== NULL
)
6463 /* The first entry in .dynsym is a dummy symbol.
6464 Clear all the section syms, in case we don't output them all. */
6465 ++section_sym_count
;
6466 memset (s
->contents
, 0, section_sym_count
* bed
->s
->sizeof_sym
);
6469 elf_hash_table (info
)->bucketcount
= 0;
6471 /* Compute the size of the hashing table. As a side effect this
6472 computes the hash values for all the names we export. */
6473 if (info
->emit_hash
)
6475 unsigned long int *hashcodes
;
6476 struct hash_codes_info hashinf
;
6478 unsigned long int nsyms
;
6480 size_t hash_entry_size
;
6482 /* Compute the hash values for all exported symbols. At the same
6483 time store the values in an array so that we could use them for
6485 amt
= dynsymcount
* sizeof (unsigned long int);
6486 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
6487 if (hashcodes
== NULL
)
6489 hashinf
.hashcodes
= hashcodes
;
6490 hashinf
.error
= FALSE
;
6492 /* Put all hash values in HASHCODES. */
6493 elf_link_hash_traverse (elf_hash_table (info
),
6494 elf_collect_hash_codes
, &hashinf
);
6501 nsyms
= hashinf
.hashcodes
- hashcodes
;
6503 = compute_bucket_count (info
, hashcodes
, nsyms
, 0);
6506 if (bucketcount
== 0)
6509 elf_hash_table (info
)->bucketcount
= bucketcount
;
6511 s
= bfd_get_linker_section (dynobj
, ".hash");
6512 BFD_ASSERT (s
!= NULL
);
6513 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
6514 s
->size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
6515 s
->contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6516 if (s
->contents
== NULL
)
6519 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
6520 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
6521 s
->contents
+ hash_entry_size
);
6524 if (info
->emit_gnu_hash
)
6527 unsigned char *contents
;
6528 struct collect_gnu_hash_codes cinfo
;
6532 memset (&cinfo
, 0, sizeof (cinfo
));
6534 /* Compute the hash values for all exported symbols. At the same
6535 time store the values in an array so that we could use them for
6537 amt
= dynsymcount
* 2 * sizeof (unsigned long int);
6538 cinfo
.hashcodes
= (long unsigned int *) bfd_malloc (amt
);
6539 if (cinfo
.hashcodes
== NULL
)
6542 cinfo
.hashval
= cinfo
.hashcodes
+ dynsymcount
;
6543 cinfo
.min_dynindx
= -1;
6544 cinfo
.output_bfd
= output_bfd
;
6547 /* Put all hash values in HASHCODES. */
6548 elf_link_hash_traverse (elf_hash_table (info
),
6549 elf_collect_gnu_hash_codes
, &cinfo
);
6552 free (cinfo
.hashcodes
);
6557 = compute_bucket_count (info
, cinfo
.hashcodes
, cinfo
.nsyms
, 1);
6559 if (bucketcount
== 0)
6561 free (cinfo
.hashcodes
);
6565 s
= bfd_get_linker_section (dynobj
, ".gnu.hash");
6566 BFD_ASSERT (s
!= NULL
);
6568 if (cinfo
.nsyms
== 0)
6570 /* Empty .gnu.hash section is special. */
6571 BFD_ASSERT (cinfo
.min_dynindx
== -1);
6572 free (cinfo
.hashcodes
);
6573 s
->size
= 5 * 4 + bed
->s
->arch_size
/ 8;
6574 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6575 if (contents
== NULL
)
6577 s
->contents
= contents
;
6578 /* 1 empty bucket. */
6579 bfd_put_32 (output_bfd
, 1, contents
);
6580 /* SYMIDX above the special symbol 0. */
6581 bfd_put_32 (output_bfd
, 1, contents
+ 4);
6582 /* Just one word for bitmask. */
6583 bfd_put_32 (output_bfd
, 1, contents
+ 8);
6584 /* Only hash fn bloom filter. */
6585 bfd_put_32 (output_bfd
, 0, contents
+ 12);
6586 /* No hashes are valid - empty bitmask. */
6587 bfd_put (bed
->s
->arch_size
, output_bfd
, 0, contents
+ 16);
6588 /* No hashes in the only bucket. */
6589 bfd_put_32 (output_bfd
, 0,
6590 contents
+ 16 + bed
->s
->arch_size
/ 8);
6594 unsigned long int maskwords
, maskbitslog2
, x
;
6595 BFD_ASSERT (cinfo
.min_dynindx
!= -1);
6599 while ((x
>>= 1) != 0)
6601 if (maskbitslog2
< 3)
6603 else if ((1 << (maskbitslog2
- 2)) & cinfo
.nsyms
)
6604 maskbitslog2
= maskbitslog2
+ 3;
6606 maskbitslog2
= maskbitslog2
+ 2;
6607 if (bed
->s
->arch_size
== 64)
6609 if (maskbitslog2
== 5)
6615 cinfo
.mask
= (1 << cinfo
.shift1
) - 1;
6616 cinfo
.shift2
= maskbitslog2
;
6617 cinfo
.maskbits
= 1 << maskbitslog2
;
6618 maskwords
= 1 << (maskbitslog2
- cinfo
.shift1
);
6619 amt
= bucketcount
* sizeof (unsigned long int) * 2;
6620 amt
+= maskwords
* sizeof (bfd_vma
);
6621 cinfo
.bitmask
= (bfd_vma
*) bfd_malloc (amt
);
6622 if (cinfo
.bitmask
== NULL
)
6624 free (cinfo
.hashcodes
);
6628 cinfo
.counts
= (long unsigned int *) (cinfo
.bitmask
+ maskwords
);
6629 cinfo
.indx
= cinfo
.counts
+ bucketcount
;
6630 cinfo
.symindx
= dynsymcount
- cinfo
.nsyms
;
6631 memset (cinfo
.bitmask
, 0, maskwords
* sizeof (bfd_vma
));
6633 /* Determine how often each hash bucket is used. */
6634 memset (cinfo
.counts
, 0, bucketcount
* sizeof (cinfo
.counts
[0]));
6635 for (i
= 0; i
< cinfo
.nsyms
; ++i
)
6636 ++cinfo
.counts
[cinfo
.hashcodes
[i
] % bucketcount
];
6638 for (i
= 0, cnt
= cinfo
.symindx
; i
< bucketcount
; ++i
)
6639 if (cinfo
.counts
[i
] != 0)
6641 cinfo
.indx
[i
] = cnt
;
6642 cnt
+= cinfo
.counts
[i
];
6644 BFD_ASSERT (cnt
== dynsymcount
);
6645 cinfo
.bucketcount
= bucketcount
;
6646 cinfo
.local_indx
= cinfo
.min_dynindx
;
6648 s
->size
= (4 + bucketcount
+ cinfo
.nsyms
) * 4;
6649 s
->size
+= cinfo
.maskbits
/ 8;
6650 contents
= (unsigned char *) bfd_zalloc (output_bfd
, s
->size
);
6651 if (contents
== NULL
)
6653 free (cinfo
.bitmask
);
6654 free (cinfo
.hashcodes
);
6658 s
->contents
= contents
;
6659 bfd_put_32 (output_bfd
, bucketcount
, contents
);
6660 bfd_put_32 (output_bfd
, cinfo
.symindx
, contents
+ 4);
6661 bfd_put_32 (output_bfd
, maskwords
, contents
+ 8);
6662 bfd_put_32 (output_bfd
, cinfo
.shift2
, contents
+ 12);
6663 contents
+= 16 + cinfo
.maskbits
/ 8;
6665 for (i
= 0; i
< bucketcount
; ++i
)
6667 if (cinfo
.counts
[i
] == 0)
6668 bfd_put_32 (output_bfd
, 0, contents
);
6670 bfd_put_32 (output_bfd
, cinfo
.indx
[i
], contents
);
6674 cinfo
.contents
= contents
;
6676 /* Renumber dynamic symbols, populate .gnu.hash section. */
6677 elf_link_hash_traverse (elf_hash_table (info
),
6678 elf_renumber_gnu_hash_syms
, &cinfo
);
6680 contents
= s
->contents
+ 16;
6681 for (i
= 0; i
< maskwords
; ++i
)
6683 bfd_put (bed
->s
->arch_size
, output_bfd
, cinfo
.bitmask
[i
],
6685 contents
+= bed
->s
->arch_size
/ 8;
6688 free (cinfo
.bitmask
);
6689 free (cinfo
.hashcodes
);
6693 s
= bfd_get_linker_section (dynobj
, ".dynstr");
6694 BFD_ASSERT (s
!= NULL
);
6696 elf_finalize_dynstr (output_bfd
, info
);
6698 s
->size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
6700 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
6701 if (!_bfd_elf_add_dynamic_entry (info
, DT_NULL
, 0))
6708 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
6711 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
6714 BFD_ASSERT (sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
);
6715 sec
->sec_info_type
= SEC_INFO_TYPE_NONE
;
6718 /* Finish SHF_MERGE section merging. */
6721 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
6726 if (!is_elf_hash_table (info
->hash
))
6729 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
6730 if ((ibfd
->flags
& DYNAMIC
) == 0)
6731 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6732 if ((sec
->flags
& SEC_MERGE
) != 0
6733 && !bfd_is_abs_section (sec
->output_section
))
6735 struct bfd_elf_section_data
*secdata
;
6737 secdata
= elf_section_data (sec
);
6738 if (! _bfd_add_merge_section (abfd
,
6739 &elf_hash_table (info
)->merge_info
,
6740 sec
, &secdata
->sec_info
))
6742 else if (secdata
->sec_info
)
6743 sec
->sec_info_type
= SEC_INFO_TYPE_MERGE
;
6746 if (elf_hash_table (info
)->merge_info
!= NULL
)
6747 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
6748 merge_sections_remove_hook
);
6752 /* Create an entry in an ELF linker hash table. */
6754 struct bfd_hash_entry
*
6755 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
6756 struct bfd_hash_table
*table
,
6759 /* Allocate the structure if it has not already been allocated by a
6763 entry
= (struct bfd_hash_entry
*)
6764 bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
6769 /* Call the allocation method of the superclass. */
6770 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
6773 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
6774 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
6776 /* Set local fields. */
6779 ret
->got
= htab
->init_got_refcount
;
6780 ret
->plt
= htab
->init_plt_refcount
;
6781 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
6782 - offsetof (struct elf_link_hash_entry
, size
)));
6783 /* Assume that we have been called by a non-ELF symbol reader.
6784 This flag is then reset by the code which reads an ELF input
6785 file. This ensures that a symbol created by a non-ELF symbol
6786 reader will have the flag set correctly. */
6793 /* Copy data from an indirect symbol to its direct symbol, hiding the
6794 old indirect symbol. Also used for copying flags to a weakdef. */
6797 _bfd_elf_link_hash_copy_indirect (struct bfd_link_info
*info
,
6798 struct elf_link_hash_entry
*dir
,
6799 struct elf_link_hash_entry
*ind
)
6801 struct elf_link_hash_table
*htab
;
6803 /* Copy down any references that we may have already seen to the
6804 symbol which just became indirect. */
6806 dir
->ref_dynamic
|= ind
->ref_dynamic
;
6807 dir
->ref_regular
|= ind
->ref_regular
;
6808 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
6809 dir
->non_got_ref
|= ind
->non_got_ref
;
6810 dir
->needs_plt
|= ind
->needs_plt
;
6811 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
6813 if (ind
->root
.type
!= bfd_link_hash_indirect
)
6816 /* Copy over the global and procedure linkage table refcount entries.
6817 These may have been already set up by a check_relocs routine. */
6818 htab
= elf_hash_table (info
);
6819 if (ind
->got
.refcount
> htab
->init_got_refcount
.refcount
)
6821 if (dir
->got
.refcount
< 0)
6822 dir
->got
.refcount
= 0;
6823 dir
->got
.refcount
+= ind
->got
.refcount
;
6824 ind
->got
.refcount
= htab
->init_got_refcount
.refcount
;
6827 if (ind
->plt
.refcount
> htab
->init_plt_refcount
.refcount
)
6829 if (dir
->plt
.refcount
< 0)
6830 dir
->plt
.refcount
= 0;
6831 dir
->plt
.refcount
+= ind
->plt
.refcount
;
6832 ind
->plt
.refcount
= htab
->init_plt_refcount
.refcount
;
6835 if (ind
->dynindx
!= -1)
6837 if (dir
->dynindx
!= -1)
6838 _bfd_elf_strtab_delref (htab
->dynstr
, dir
->dynstr_index
);
6839 dir
->dynindx
= ind
->dynindx
;
6840 dir
->dynstr_index
= ind
->dynstr_index
;
6842 ind
->dynstr_index
= 0;
6847 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
6848 struct elf_link_hash_entry
*h
,
6849 bfd_boolean force_local
)
6851 /* STT_GNU_IFUNC symbol must go through PLT. */
6852 if (h
->type
!= STT_GNU_IFUNC
)
6854 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
6859 h
->forced_local
= 1;
6860 if (h
->dynindx
!= -1)
6863 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
6869 /* Initialize an ELF linker hash table. */
6872 _bfd_elf_link_hash_table_init
6873 (struct elf_link_hash_table
*table
,
6875 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
6876 struct bfd_hash_table
*,
6878 unsigned int entsize
,
6879 enum elf_target_id target_id
)
6882 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
6884 memset (table
, 0, sizeof * table
);
6885 table
->init_got_refcount
.refcount
= can_refcount
- 1;
6886 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
6887 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
6888 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
6889 /* The first dynamic symbol is a dummy. */
6890 table
->dynsymcount
= 1;
6892 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
, entsize
);
6894 table
->root
.type
= bfd_link_elf_hash_table
;
6895 table
->hash_table_id
= target_id
;
6900 /* Create an ELF linker hash table. */
6902 struct bfd_link_hash_table
*
6903 _bfd_elf_link_hash_table_create (bfd
*abfd
)
6905 struct elf_link_hash_table
*ret
;
6906 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
6908 ret
= (struct elf_link_hash_table
*) bfd_malloc (amt
);
6912 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
,
6913 sizeof (struct elf_link_hash_entry
),
6923 /* This is a hook for the ELF emulation code in the generic linker to
6924 tell the backend linker what file name to use for the DT_NEEDED
6925 entry for a dynamic object. */
6928 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
6930 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6931 && bfd_get_format (abfd
) == bfd_object
)
6932 elf_dt_name (abfd
) = name
;
6936 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
6939 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6940 && bfd_get_format (abfd
) == bfd_object
)
6941 lib_class
= elf_dyn_lib_class (abfd
);
6948 bfd_elf_set_dyn_lib_class (bfd
*abfd
, enum dynamic_lib_link_class lib_class
)
6950 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6951 && bfd_get_format (abfd
) == bfd_object
)
6952 elf_dyn_lib_class (abfd
) = lib_class
;
6955 /* Get the list of DT_NEEDED entries for a link. This is a hook for
6956 the linker ELF emulation code. */
6958 struct bfd_link_needed_list
*
6959 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6960 struct bfd_link_info
*info
)
6962 if (! is_elf_hash_table (info
->hash
))
6964 return elf_hash_table (info
)->needed
;
6967 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
6968 hook for the linker ELF emulation code. */
6970 struct bfd_link_needed_list
*
6971 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
6972 struct bfd_link_info
*info
)
6974 if (! is_elf_hash_table (info
->hash
))
6976 return elf_hash_table (info
)->runpath
;
6979 /* Get the name actually used for a dynamic object for a link. This
6980 is the SONAME entry if there is one. Otherwise, it is the string
6981 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
6984 bfd_elf_get_dt_soname (bfd
*abfd
)
6986 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6987 && bfd_get_format (abfd
) == bfd_object
)
6988 return elf_dt_name (abfd
);
6992 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
6993 the ELF linker emulation code. */
6996 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
6997 struct bfd_link_needed_list
**pneeded
)
7000 bfd_byte
*dynbuf
= NULL
;
7001 unsigned int elfsec
;
7002 unsigned long shlink
;
7003 bfd_byte
*extdyn
, *extdynend
;
7005 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
7009 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
7010 || bfd_get_format (abfd
) != bfd_object
)
7013 s
= bfd_get_section_by_name (abfd
, ".dynamic");
7014 if (s
== NULL
|| s
->size
== 0)
7017 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
7020 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
7021 if (elfsec
== SHN_BAD
)
7024 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
7026 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
7027 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
7030 extdynend
= extdyn
+ s
->size
;
7031 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
7033 Elf_Internal_Dyn dyn
;
7035 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
7037 if (dyn
.d_tag
== DT_NULL
)
7040 if (dyn
.d_tag
== DT_NEEDED
)
7043 struct bfd_link_needed_list
*l
;
7044 unsigned int tagv
= dyn
.d_un
.d_val
;
7047 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
7052 l
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
7073 struct elf_symbuf_symbol
7075 unsigned long st_name
; /* Symbol name, index in string tbl */
7076 unsigned char st_info
; /* Type and binding attributes */
7077 unsigned char st_other
; /* Visibilty, and target specific */
7080 struct elf_symbuf_head
7082 struct elf_symbuf_symbol
*ssym
;
7083 bfd_size_type count
;
7084 unsigned int st_shndx
;
7091 Elf_Internal_Sym
*isym
;
7092 struct elf_symbuf_symbol
*ssym
;
7097 /* Sort references to symbols by ascending section number. */
7100 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
7102 const Elf_Internal_Sym
*s1
= *(const Elf_Internal_Sym
**) arg1
;
7103 const Elf_Internal_Sym
*s2
= *(const Elf_Internal_Sym
**) arg2
;
7105 return s1
->st_shndx
- s2
->st_shndx
;
7109 elf_sym_name_compare (const void *arg1
, const void *arg2
)
7111 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
7112 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
7113 return strcmp (s1
->name
, s2
->name
);
7116 static struct elf_symbuf_head
*
7117 elf_create_symbuf (bfd_size_type symcount
, Elf_Internal_Sym
*isymbuf
)
7119 Elf_Internal_Sym
**ind
, **indbufend
, **indbuf
;
7120 struct elf_symbuf_symbol
*ssym
;
7121 struct elf_symbuf_head
*ssymbuf
, *ssymhead
;
7122 bfd_size_type i
, shndx_count
, total_size
;
7124 indbuf
= (Elf_Internal_Sym
**) bfd_malloc2 (symcount
, sizeof (*indbuf
));
7128 for (ind
= indbuf
, i
= 0; i
< symcount
; i
++)
7129 if (isymbuf
[i
].st_shndx
!= SHN_UNDEF
)
7130 *ind
++ = &isymbuf
[i
];
7133 qsort (indbuf
, indbufend
- indbuf
, sizeof (Elf_Internal_Sym
*),
7134 elf_sort_elf_symbol
);
7137 if (indbufend
> indbuf
)
7138 for (ind
= indbuf
, shndx_count
++; ind
< indbufend
- 1; ind
++)
7139 if (ind
[0]->st_shndx
!= ind
[1]->st_shndx
)
7142 total_size
= ((shndx_count
+ 1) * sizeof (*ssymbuf
)
7143 + (indbufend
- indbuf
) * sizeof (*ssym
));
7144 ssymbuf
= (struct elf_symbuf_head
*) bfd_malloc (total_size
);
7145 if (ssymbuf
== NULL
)
7151 ssym
= (struct elf_symbuf_symbol
*) (ssymbuf
+ shndx_count
+ 1);
7152 ssymbuf
->ssym
= NULL
;
7153 ssymbuf
->count
= shndx_count
;
7154 ssymbuf
->st_shndx
= 0;
7155 for (ssymhead
= ssymbuf
, ind
= indbuf
; ind
< indbufend
; ssym
++, ind
++)
7157 if (ind
== indbuf
|| ssymhead
->st_shndx
!= (*ind
)->st_shndx
)
7160 ssymhead
->ssym
= ssym
;
7161 ssymhead
->count
= 0;
7162 ssymhead
->st_shndx
= (*ind
)->st_shndx
;
7164 ssym
->st_name
= (*ind
)->st_name
;
7165 ssym
->st_info
= (*ind
)->st_info
;
7166 ssym
->st_other
= (*ind
)->st_other
;
7169 BFD_ASSERT ((bfd_size_type
) (ssymhead
- ssymbuf
) == shndx_count
7170 && (((bfd_hostptr_t
) ssym
- (bfd_hostptr_t
) ssymbuf
)
7177 /* Check if 2 sections define the same set of local and global
7181 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
,
7182 struct bfd_link_info
*info
)
7185 const struct elf_backend_data
*bed1
, *bed2
;
7186 Elf_Internal_Shdr
*hdr1
, *hdr2
;
7187 bfd_size_type symcount1
, symcount2
;
7188 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
7189 struct elf_symbuf_head
*ssymbuf1
, *ssymbuf2
;
7190 Elf_Internal_Sym
*isym
, *isymend
;
7191 struct elf_symbol
*symtable1
= NULL
, *symtable2
= NULL
;
7192 bfd_size_type count1
, count2
, i
;
7193 unsigned int shndx1
, shndx2
;
7199 /* Both sections have to be in ELF. */
7200 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
7201 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
7204 if (elf_section_type (sec1
) != elf_section_type (sec2
))
7207 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
7208 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
7209 if (shndx1
== SHN_BAD
|| shndx2
== SHN_BAD
)
7212 bed1
= get_elf_backend_data (bfd1
);
7213 bed2
= get_elf_backend_data (bfd2
);
7214 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
7215 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
7216 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
7217 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
7219 if (symcount1
== 0 || symcount2
== 0)
7225 ssymbuf1
= (struct elf_symbuf_head
*) elf_tdata (bfd1
)->symbuf
;
7226 ssymbuf2
= (struct elf_symbuf_head
*) elf_tdata (bfd2
)->symbuf
;
7228 if (ssymbuf1
== NULL
)
7230 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
7232 if (isymbuf1
== NULL
)
7235 if (!info
->reduce_memory_overheads
)
7236 elf_tdata (bfd1
)->symbuf
= ssymbuf1
7237 = elf_create_symbuf (symcount1
, isymbuf1
);
7240 if (ssymbuf1
== NULL
|| ssymbuf2
== NULL
)
7242 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
7244 if (isymbuf2
== NULL
)
7247 if (ssymbuf1
!= NULL
&& !info
->reduce_memory_overheads
)
7248 elf_tdata (bfd2
)->symbuf
= ssymbuf2
7249 = elf_create_symbuf (symcount2
, isymbuf2
);
7252 if (ssymbuf1
!= NULL
&& ssymbuf2
!= NULL
)
7254 /* Optimized faster version. */
7255 bfd_size_type lo
, hi
, mid
;
7256 struct elf_symbol
*symp
;
7257 struct elf_symbuf_symbol
*ssym
, *ssymend
;
7260 hi
= ssymbuf1
->count
;
7265 mid
= (lo
+ hi
) / 2;
7266 if (shndx1
< ssymbuf1
[mid
].st_shndx
)
7268 else if (shndx1
> ssymbuf1
[mid
].st_shndx
)
7272 count1
= ssymbuf1
[mid
].count
;
7279 hi
= ssymbuf2
->count
;
7284 mid
= (lo
+ hi
) / 2;
7285 if (shndx2
< ssymbuf2
[mid
].st_shndx
)
7287 else if (shndx2
> ssymbuf2
[mid
].st_shndx
)
7291 count2
= ssymbuf2
[mid
].count
;
7297 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7300 symtable1
= (struct elf_symbol
*)
7301 bfd_malloc (count1
* sizeof (struct elf_symbol
));
7302 symtable2
= (struct elf_symbol
*)
7303 bfd_malloc (count2
* sizeof (struct elf_symbol
));
7304 if (symtable1
== NULL
|| symtable2
== NULL
)
7308 for (ssym
= ssymbuf1
->ssym
, ssymend
= ssym
+ count1
;
7309 ssym
< ssymend
; ssym
++, symp
++)
7311 symp
->u
.ssym
= ssym
;
7312 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
7318 for (ssym
= ssymbuf2
->ssym
, ssymend
= ssym
+ count2
;
7319 ssym
< ssymend
; ssym
++, symp
++)
7321 symp
->u
.ssym
= ssym
;
7322 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
7327 /* Sort symbol by name. */
7328 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7329 elf_sym_name_compare
);
7330 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7331 elf_sym_name_compare
);
7333 for (i
= 0; i
< count1
; i
++)
7334 /* Two symbols must have the same binding, type and name. */
7335 if (symtable1
[i
].u
.ssym
->st_info
!= symtable2
[i
].u
.ssym
->st_info
7336 || symtable1
[i
].u
.ssym
->st_other
!= symtable2
[i
].u
.ssym
->st_other
7337 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7344 symtable1
= (struct elf_symbol
*)
7345 bfd_malloc (symcount1
* sizeof (struct elf_symbol
));
7346 symtable2
= (struct elf_symbol
*)
7347 bfd_malloc (symcount2
* sizeof (struct elf_symbol
));
7348 if (symtable1
== NULL
|| symtable2
== NULL
)
7351 /* Count definitions in the section. */
7353 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
; isym
< isymend
; isym
++)
7354 if (isym
->st_shndx
== shndx1
)
7355 symtable1
[count1
++].u
.isym
= isym
;
7358 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
; isym
< isymend
; isym
++)
7359 if (isym
->st_shndx
== shndx2
)
7360 symtable2
[count2
++].u
.isym
= isym
;
7362 if (count1
== 0 || count2
== 0 || count1
!= count2
)
7365 for (i
= 0; i
< count1
; i
++)
7367 = bfd_elf_string_from_elf_section (bfd1
, hdr1
->sh_link
,
7368 symtable1
[i
].u
.isym
->st_name
);
7370 for (i
= 0; i
< count2
; i
++)
7372 = bfd_elf_string_from_elf_section (bfd2
, hdr2
->sh_link
,
7373 symtable2
[i
].u
.isym
->st_name
);
7375 /* Sort symbol by name. */
7376 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
7377 elf_sym_name_compare
);
7378 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
7379 elf_sym_name_compare
);
7381 for (i
= 0; i
< count1
; i
++)
7382 /* Two symbols must have the same binding, type and name. */
7383 if (symtable1
[i
].u
.isym
->st_info
!= symtable2
[i
].u
.isym
->st_info
7384 || symtable1
[i
].u
.isym
->st_other
!= symtable2
[i
].u
.isym
->st_other
7385 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)
7403 /* Return TRUE if 2 section types are compatible. */
7406 _bfd_elf_match_sections_by_type (bfd
*abfd
, const asection
*asec
,
7407 bfd
*bbfd
, const asection
*bsec
)
7411 || abfd
->xvec
->flavour
!= bfd_target_elf_flavour
7412 || bbfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7415 return elf_section_type (asec
) == elf_section_type (bsec
);
7418 /* Final phase of ELF linker. */
7420 /* A structure we use to avoid passing large numbers of arguments. */
7422 struct elf_final_link_info
7424 /* General link information. */
7425 struct bfd_link_info
*info
;
7428 /* Symbol string table. */
7429 struct bfd_strtab_hash
*symstrtab
;
7430 /* .dynsym section. */
7431 asection
*dynsym_sec
;
7432 /* .hash section. */
7434 /* symbol version section (.gnu.version). */
7435 asection
*symver_sec
;
7436 /* Buffer large enough to hold contents of any section. */
7438 /* Buffer large enough to hold external relocs of any section. */
7439 void *external_relocs
;
7440 /* Buffer large enough to hold internal relocs of any section. */
7441 Elf_Internal_Rela
*internal_relocs
;
7442 /* Buffer large enough to hold external local symbols of any input
7444 bfd_byte
*external_syms
;
7445 /* And a buffer for symbol section indices. */
7446 Elf_External_Sym_Shndx
*locsym_shndx
;
7447 /* Buffer large enough to hold internal local symbols of any input
7449 Elf_Internal_Sym
*internal_syms
;
7450 /* Array large enough to hold a symbol index for each local symbol
7451 of any input BFD. */
7453 /* Array large enough to hold a section pointer for each local
7454 symbol of any input BFD. */
7455 asection
**sections
;
7456 /* Buffer to hold swapped out symbols. */
7458 /* And one for symbol section indices. */
7459 Elf_External_Sym_Shndx
*symshndxbuf
;
7460 /* Number of swapped out symbols in buffer. */
7461 size_t symbuf_count
;
7462 /* Number of symbols which fit in symbuf. */
7464 /* And same for symshndxbuf. */
7465 size_t shndxbuf_size
;
7466 /* Number of STT_FILE syms seen. */
7467 size_t filesym_count
;
7470 /* This struct is used to pass information to elf_link_output_extsym. */
7472 struct elf_outext_info
7475 bfd_boolean localsyms
;
7476 bfd_boolean need_second_pass
;
7477 bfd_boolean second_pass
;
7478 struct elf_final_link_info
*flinfo
;
7482 /* Support for evaluating a complex relocation.
7484 Complex relocations are generalized, self-describing relocations. The
7485 implementation of them consists of two parts: complex symbols, and the
7486 relocations themselves.
7488 The relocations are use a reserved elf-wide relocation type code (R_RELC
7489 external / BFD_RELOC_RELC internal) and an encoding of relocation field
7490 information (start bit, end bit, word width, etc) into the addend. This
7491 information is extracted from CGEN-generated operand tables within gas.
7493 Complex symbols are mangled symbols (BSF_RELC external / STT_RELC
7494 internal) representing prefix-notation expressions, including but not
7495 limited to those sorts of expressions normally encoded as addends in the
7496 addend field. The symbol mangling format is:
7499 | <unary-operator> ':' <node>
7500 | <binary-operator> ':' <node> ':' <node>
7503 <literal> := 's' <digits=N> ':' <N character symbol name>
7504 | 'S' <digits=N> ':' <N character section name>
7508 <binary-operator> := as in C
7509 <unary-operator> := as in C, plus "0-" for unambiguous negation. */
7512 set_symbol_value (bfd
*bfd_with_globals
,
7513 Elf_Internal_Sym
*isymbuf
,
7518 struct elf_link_hash_entry
**sym_hashes
;
7519 struct elf_link_hash_entry
*h
;
7520 size_t extsymoff
= locsymcount
;
7522 if (symidx
< locsymcount
)
7524 Elf_Internal_Sym
*sym
;
7526 sym
= isymbuf
+ symidx
;
7527 if (ELF_ST_BIND (sym
->st_info
) == STB_LOCAL
)
7529 /* It is a local symbol: move it to the
7530 "absolute" section and give it a value. */
7531 sym
->st_shndx
= SHN_ABS
;
7532 sym
->st_value
= val
;
7535 BFD_ASSERT (elf_bad_symtab (bfd_with_globals
));
7539 /* It is a global symbol: set its link type
7540 to "defined" and give it a value. */
7542 sym_hashes
= elf_sym_hashes (bfd_with_globals
);
7543 h
= sym_hashes
[symidx
- extsymoff
];
7544 while (h
->root
.type
== bfd_link_hash_indirect
7545 || h
->root
.type
== bfd_link_hash_warning
)
7546 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7547 h
->root
.type
= bfd_link_hash_defined
;
7548 h
->root
.u
.def
.value
= val
;
7549 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
7553 resolve_symbol (const char *name
,
7555 struct elf_final_link_info
*flinfo
,
7557 Elf_Internal_Sym
*isymbuf
,
7560 Elf_Internal_Sym
*sym
;
7561 struct bfd_link_hash_entry
*global_entry
;
7562 const char *candidate
= NULL
;
7563 Elf_Internal_Shdr
*symtab_hdr
;
7566 symtab_hdr
= & elf_tdata (input_bfd
)->symtab_hdr
;
7568 for (i
= 0; i
< locsymcount
; ++ i
)
7572 if (ELF_ST_BIND (sym
->st_info
) != STB_LOCAL
)
7575 candidate
= bfd_elf_string_from_elf_section (input_bfd
,
7576 symtab_hdr
->sh_link
,
7579 printf ("Comparing string: '%s' vs. '%s' = 0x%lx\n",
7580 name
, candidate
, (unsigned long) sym
->st_value
);
7582 if (candidate
&& strcmp (candidate
, name
) == 0)
7584 asection
*sec
= flinfo
->sections
[i
];
7586 *result
= _bfd_elf_rel_local_sym (input_bfd
, sym
, &sec
, 0);
7587 *result
+= sec
->output_offset
+ sec
->output_section
->vma
;
7589 printf ("Found symbol with value %8.8lx\n",
7590 (unsigned long) *result
);
7596 /* Hmm, haven't found it yet. perhaps it is a global. */
7597 global_entry
= bfd_link_hash_lookup (flinfo
->info
->hash
, name
,
7598 FALSE
, FALSE
, TRUE
);
7602 if (global_entry
->type
== bfd_link_hash_defined
7603 || global_entry
->type
== bfd_link_hash_defweak
)
7605 *result
= (global_entry
->u
.def
.value
7606 + global_entry
->u
.def
.section
->output_section
->vma
7607 + global_entry
->u
.def
.section
->output_offset
);
7609 printf ("Found GLOBAL symbol '%s' with value %8.8lx\n",
7610 global_entry
->root
.string
, (unsigned long) *result
);
7619 resolve_section (const char *name
,
7626 for (curr
= sections
; curr
; curr
= curr
->next
)
7627 if (strcmp (curr
->name
, name
) == 0)
7629 *result
= curr
->vma
;
7633 /* Hmm. still haven't found it. try pseudo-section names. */
7634 for (curr
= sections
; curr
; curr
= curr
->next
)
7636 len
= strlen (curr
->name
);
7637 if (len
> strlen (name
))
7640 if (strncmp (curr
->name
, name
, len
) == 0)
7642 if (strncmp (".end", name
+ len
, 4) == 0)
7644 *result
= curr
->vma
+ curr
->size
;
7648 /* Insert more pseudo-section names here, if you like. */
7656 undefined_reference (const char *reftype
, const char *name
)
7658 _bfd_error_handler (_("undefined %s reference in complex symbol: %s"),
7663 eval_symbol (bfd_vma
*result
,
7666 struct elf_final_link_info
*flinfo
,
7668 Elf_Internal_Sym
*isymbuf
,
7677 const char *sym
= *symp
;
7679 bfd_boolean symbol_is_section
= FALSE
;
7684 if (len
< 1 || len
> sizeof (symbuf
))
7686 bfd_set_error (bfd_error_invalid_operation
);
7699 *result
= strtoul (sym
, (char **) symp
, 16);
7703 symbol_is_section
= TRUE
;
7706 symlen
= strtol (sym
, (char **) symp
, 10);
7707 sym
= *symp
+ 1; /* Skip the trailing ':'. */
7709 if (symend
< sym
|| symlen
+ 1 > sizeof (symbuf
))
7711 bfd_set_error (bfd_error_invalid_operation
);
7715 memcpy (symbuf
, sym
, symlen
);
7716 symbuf
[symlen
] = '\0';
7717 *symp
= sym
+ symlen
;
7719 /* Is it always possible, with complex symbols, that gas "mis-guessed"
7720 the symbol as a section, or vice-versa. so we're pretty liberal in our
7721 interpretation here; section means "try section first", not "must be a
7722 section", and likewise with symbol. */
7724 if (symbol_is_section
)
7726 if (!resolve_section (symbuf
, flinfo
->output_bfd
->sections
, result
)
7727 && !resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7728 isymbuf
, locsymcount
))
7730 undefined_reference ("section", symbuf
);
7736 if (!resolve_symbol (symbuf
, input_bfd
, flinfo
, result
,
7737 isymbuf
, locsymcount
)
7738 && !resolve_section (symbuf
, flinfo
->output_bfd
->sections
,
7741 undefined_reference ("symbol", symbuf
);
7748 /* All that remains are operators. */
7750 #define UNARY_OP(op) \
7751 if (strncmp (sym, #op, strlen (#op)) == 0) \
7753 sym += strlen (#op); \
7757 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7758 isymbuf, locsymcount, signed_p)) \
7761 *result = op ((bfd_signed_vma) a); \
7767 #define BINARY_OP(op) \
7768 if (strncmp (sym, #op, strlen (#op)) == 0) \
7770 sym += strlen (#op); \
7774 if (!eval_symbol (&a, symp, input_bfd, flinfo, dot, \
7775 isymbuf, locsymcount, signed_p)) \
7778 if (!eval_symbol (&b, symp, input_bfd, flinfo, dot, \
7779 isymbuf, locsymcount, signed_p)) \
7782 *result = ((bfd_signed_vma) a) op ((bfd_signed_vma) b); \
7812 _bfd_error_handler (_("unknown operator '%c' in complex symbol"), * sym
);
7813 bfd_set_error (bfd_error_invalid_operation
);
7819 put_value (bfd_vma size
,
7820 unsigned long chunksz
,
7825 location
+= (size
- chunksz
);
7827 for (; size
; size
-= chunksz
, location
-= chunksz
, x
>>= (chunksz
* 8))
7835 bfd_put_8 (input_bfd
, x
, location
);
7838 bfd_put_16 (input_bfd
, x
, location
);
7841 bfd_put_32 (input_bfd
, x
, location
);
7845 bfd_put_64 (input_bfd
, x
, location
);
7855 get_value (bfd_vma size
,
7856 unsigned long chunksz
,
7862 for (; size
; size
-= chunksz
, location
+= chunksz
)
7870 x
= (x
<< (8 * chunksz
)) | bfd_get_8 (input_bfd
, location
);
7873 x
= (x
<< (8 * chunksz
)) | bfd_get_16 (input_bfd
, location
);
7876 x
= (x
<< (8 * chunksz
)) | bfd_get_32 (input_bfd
, location
);
7880 x
= (x
<< (8 * chunksz
)) | bfd_get_64 (input_bfd
, location
);
7891 decode_complex_addend (unsigned long *start
, /* in bits */
7892 unsigned long *oplen
, /* in bits */
7893 unsigned long *len
, /* in bits */
7894 unsigned long *wordsz
, /* in bytes */
7895 unsigned long *chunksz
, /* in bytes */
7896 unsigned long *lsb0_p
,
7897 unsigned long *signed_p
,
7898 unsigned long *trunc_p
,
7899 unsigned long encoded
)
7901 * start
= encoded
& 0x3F;
7902 * len
= (encoded
>> 6) & 0x3F;
7903 * oplen
= (encoded
>> 12) & 0x3F;
7904 * wordsz
= (encoded
>> 18) & 0xF;
7905 * chunksz
= (encoded
>> 22) & 0xF;
7906 * lsb0_p
= (encoded
>> 27) & 1;
7907 * signed_p
= (encoded
>> 28) & 1;
7908 * trunc_p
= (encoded
>> 29) & 1;
7911 bfd_reloc_status_type
7912 bfd_elf_perform_complex_relocation (bfd
*input_bfd
,
7913 asection
*input_section ATTRIBUTE_UNUSED
,
7915 Elf_Internal_Rela
*rel
,
7918 bfd_vma shift
, x
, mask
;
7919 unsigned long start
, oplen
, len
, wordsz
, chunksz
, lsb0_p
, signed_p
, trunc_p
;
7920 bfd_reloc_status_type r
;
7922 /* Perform this reloc, since it is complex.
7923 (this is not to say that it necessarily refers to a complex
7924 symbol; merely that it is a self-describing CGEN based reloc.
7925 i.e. the addend has the complete reloc information (bit start, end,
7926 word size, etc) encoded within it.). */
7928 decode_complex_addend (&start
, &oplen
, &len
, &wordsz
,
7929 &chunksz
, &lsb0_p
, &signed_p
,
7930 &trunc_p
, rel
->r_addend
);
7932 mask
= (((1L << (len
- 1)) - 1) << 1) | 1;
7935 shift
= (start
+ 1) - len
;
7937 shift
= (8 * wordsz
) - (start
+ len
);
7939 /* FIXME: octets_per_byte. */
7940 x
= get_value (wordsz
, chunksz
, input_bfd
, contents
+ rel
->r_offset
);
7943 printf ("Doing complex reloc: "
7944 "lsb0? %ld, signed? %ld, trunc? %ld, wordsz %ld, "
7945 "chunksz %ld, start %ld, len %ld, oplen %ld\n"
7946 " dest: %8.8lx, mask: %8.8lx, reloc: %8.8lx\n",
7947 lsb0_p
, signed_p
, trunc_p
, wordsz
, chunksz
, start
, len
,
7948 oplen
, (unsigned long) x
, (unsigned long) mask
,
7949 (unsigned long) relocation
);
7954 /* Now do an overflow check. */
7955 r
= bfd_check_overflow ((signed_p
7956 ? complain_overflow_signed
7957 : complain_overflow_unsigned
),
7958 len
, 0, (8 * wordsz
),
7962 x
= (x
& ~(mask
<< shift
)) | ((relocation
& mask
) << shift
);
7965 printf (" relocation: %8.8lx\n"
7966 " shifted mask: %8.8lx\n"
7967 " shifted/masked reloc: %8.8lx\n"
7968 " result: %8.8lx\n",
7969 (unsigned long) relocation
, (unsigned long) (mask
<< shift
),
7970 (unsigned long) ((relocation
& mask
) << shift
), (unsigned long) x
);
7972 /* FIXME: octets_per_byte. */
7973 put_value (wordsz
, chunksz
, input_bfd
, x
, contents
+ rel
->r_offset
);
7977 /* When performing a relocatable link, the input relocations are
7978 preserved. But, if they reference global symbols, the indices
7979 referenced must be updated. Update all the relocations found in
7983 elf_link_adjust_relocs (bfd
*abfd
,
7984 struct bfd_elf_section_reloc_data
*reldata
)
7987 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7989 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
7990 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
7991 bfd_vma r_type_mask
;
7993 unsigned int count
= reldata
->count
;
7994 struct elf_link_hash_entry
**rel_hash
= reldata
->hashes
;
7996 if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rel
)
7998 swap_in
= bed
->s
->swap_reloc_in
;
7999 swap_out
= bed
->s
->swap_reloc_out
;
8001 else if (reldata
->hdr
->sh_entsize
== bed
->s
->sizeof_rela
)
8003 swap_in
= bed
->s
->swap_reloca_in
;
8004 swap_out
= bed
->s
->swap_reloca_out
;
8009 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
8012 if (bed
->s
->arch_size
== 32)
8019 r_type_mask
= 0xffffffff;
8023 erela
= reldata
->hdr
->contents
;
8024 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= reldata
->hdr
->sh_entsize
)
8026 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
8029 if (*rel_hash
== NULL
)
8032 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
8034 (*swap_in
) (abfd
, erela
, irela
);
8035 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
8036 irela
[j
].r_info
= ((bfd_vma
) (*rel_hash
)->indx
<< r_sym_shift
8037 | (irela
[j
].r_info
& r_type_mask
));
8038 (*swap_out
) (abfd
, irela
, erela
);
8042 struct elf_link_sort_rela
8048 enum elf_reloc_type_class type
;
8049 /* We use this as an array of size int_rels_per_ext_rel. */
8050 Elf_Internal_Rela rela
[1];
8054 elf_link_sort_cmp1 (const void *A
, const void *B
)
8056 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8057 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8058 int relativea
, relativeb
;
8060 relativea
= a
->type
== reloc_class_relative
;
8061 relativeb
= b
->type
== reloc_class_relative
;
8063 if (relativea
< relativeb
)
8065 if (relativea
> relativeb
)
8067 if ((a
->rela
->r_info
& a
->u
.sym_mask
) < (b
->rela
->r_info
& b
->u
.sym_mask
))
8069 if ((a
->rela
->r_info
& a
->u
.sym_mask
) > (b
->rela
->r_info
& b
->u
.sym_mask
))
8071 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8073 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8079 elf_link_sort_cmp2 (const void *A
, const void *B
)
8081 const struct elf_link_sort_rela
*a
= (const struct elf_link_sort_rela
*) A
;
8082 const struct elf_link_sort_rela
*b
= (const struct elf_link_sort_rela
*) B
;
8085 if (a
->u
.offset
< b
->u
.offset
)
8087 if (a
->u
.offset
> b
->u
.offset
)
8089 copya
= (a
->type
== reloc_class_copy
) * 2 + (a
->type
== reloc_class_plt
);
8090 copyb
= (b
->type
== reloc_class_copy
) * 2 + (b
->type
== reloc_class_plt
);
8095 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
8097 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
8103 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
8105 asection
*dynamic_relocs
;
8108 bfd_size_type count
, size
;
8109 size_t i
, ret
, sort_elt
, ext_size
;
8110 bfd_byte
*sort
, *s_non_relative
, *p
;
8111 struct elf_link_sort_rela
*sq
;
8112 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8113 int i2e
= bed
->s
->int_rels_per_ext_rel
;
8114 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
8115 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
8116 struct bfd_link_order
*lo
;
8118 bfd_boolean use_rela
;
8120 /* Find a dynamic reloc section. */
8121 rela_dyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
8122 rel_dyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
8123 if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0
8124 && rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8126 bfd_boolean use_rela_initialised
= FALSE
;
8128 /* This is just here to stop gcc from complaining.
8129 It's initialization checking code is not perfect. */
8132 /* Both sections are present. Examine the sizes
8133 of the indirect sections to help us choose. */
8134 for (lo
= rela_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8135 if (lo
->type
== bfd_indirect_link_order
)
8137 asection
*o
= lo
->u
.indirect
.section
;
8139 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8141 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8142 /* Section size is divisible by both rel and rela sizes.
8143 It is of no help to us. */
8147 /* Section size is only divisible by rela. */
8148 if (use_rela_initialised
&& (use_rela
== FALSE
))
8151 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8152 bfd_set_error (bfd_error_invalid_operation
);
8158 use_rela_initialised
= TRUE
;
8162 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8164 /* Section size is only divisible by rel. */
8165 if (use_rela_initialised
&& (use_rela
== TRUE
))
8168 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8169 bfd_set_error (bfd_error_invalid_operation
);
8175 use_rela_initialised
= TRUE
;
8180 /* The section size is not divisible by either - something is wrong. */
8182 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8183 bfd_set_error (bfd_error_invalid_operation
);
8188 for (lo
= rel_dyn
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8189 if (lo
->type
== bfd_indirect_link_order
)
8191 asection
*o
= lo
->u
.indirect
.section
;
8193 if ((o
->size
% bed
->s
->sizeof_rela
) == 0)
8195 if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8196 /* Section size is divisible by both rel and rela sizes.
8197 It is of no help to us. */
8201 /* Section size is only divisible by rela. */
8202 if (use_rela_initialised
&& (use_rela
== FALSE
))
8205 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8206 bfd_set_error (bfd_error_invalid_operation
);
8212 use_rela_initialised
= TRUE
;
8216 else if ((o
->size
% bed
->s
->sizeof_rel
) == 0)
8218 /* Section size is only divisible by rel. */
8219 if (use_rela_initialised
&& (use_rela
== TRUE
))
8222 (_("%B: Unable to sort relocs - they are in more than one size"), abfd
);
8223 bfd_set_error (bfd_error_invalid_operation
);
8229 use_rela_initialised
= TRUE
;
8234 /* The section size is not divisible by either - something is wrong. */
8236 (_("%B: Unable to sort relocs - they are of an unknown size"), abfd
);
8237 bfd_set_error (bfd_error_invalid_operation
);
8242 if (! use_rela_initialised
)
8246 else if (rela_dyn
!= NULL
&& rela_dyn
->size
> 0)
8248 else if (rel_dyn
!= NULL
&& rel_dyn
->size
> 0)
8255 dynamic_relocs
= rela_dyn
;
8256 ext_size
= bed
->s
->sizeof_rela
;
8257 swap_in
= bed
->s
->swap_reloca_in
;
8258 swap_out
= bed
->s
->swap_reloca_out
;
8262 dynamic_relocs
= rel_dyn
;
8263 ext_size
= bed
->s
->sizeof_rel
;
8264 swap_in
= bed
->s
->swap_reloc_in
;
8265 swap_out
= bed
->s
->swap_reloc_out
;
8269 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8270 if (lo
->type
== bfd_indirect_link_order
)
8271 size
+= lo
->u
.indirect
.section
->size
;
8273 if (size
!= dynamic_relocs
->size
)
8276 sort_elt
= (sizeof (struct elf_link_sort_rela
)
8277 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
8279 count
= dynamic_relocs
->size
/ ext_size
;
8282 sort
= (bfd_byte
*) bfd_zmalloc (sort_elt
* count
);
8286 (*info
->callbacks
->warning
)
8287 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0, 0);
8291 if (bed
->s
->arch_size
== 32)
8292 r_sym_mask
= ~(bfd_vma
) 0xff;
8294 r_sym_mask
= ~(bfd_vma
) 0xffffffff;
8296 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8297 if (lo
->type
== bfd_indirect_link_order
)
8299 bfd_byte
*erel
, *erelend
;
8300 asection
*o
= lo
->u
.indirect
.section
;
8302 if (o
->contents
== NULL
&& o
->size
!= 0)
8304 /* This is a reloc section that is being handled as a normal
8305 section. See bfd_section_from_shdr. We can't combine
8306 relocs in this case. */
8311 erelend
= o
->contents
+ o
->size
;
8312 /* FIXME: octets_per_byte. */
8313 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8315 while (erel
< erelend
)
8317 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8319 (*swap_in
) (abfd
, erel
, s
->rela
);
8320 s
->type
= (*bed
->elf_backend_reloc_type_class
) (s
->rela
);
8321 s
->u
.sym_mask
= r_sym_mask
;
8327 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
8329 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
8331 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8332 if (s
->type
!= reloc_class_relative
)
8338 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
8339 for (; i
< count
; i
++, p
+= sort_elt
)
8341 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
8342 if (((sp
->rela
->r_info
^ sq
->rela
->r_info
) & r_sym_mask
) != 0)
8344 sp
->u
.offset
= sq
->rela
->r_offset
;
8347 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
8349 for (lo
= dynamic_relocs
->map_head
.link_order
; lo
!= NULL
; lo
= lo
->next
)
8350 if (lo
->type
== bfd_indirect_link_order
)
8352 bfd_byte
*erel
, *erelend
;
8353 asection
*o
= lo
->u
.indirect
.section
;
8356 erelend
= o
->contents
+ o
->size
;
8357 /* FIXME: octets_per_byte. */
8358 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
8359 while (erel
< erelend
)
8361 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
8362 (*swap_out
) (abfd
, s
->rela
, erel
);
8369 *psec
= dynamic_relocs
;
8373 /* Flush the output symbols to the file. */
8376 elf_link_flush_output_syms (struct elf_final_link_info
*flinfo
,
8377 const struct elf_backend_data
*bed
)
8379 if (flinfo
->symbuf_count
> 0)
8381 Elf_Internal_Shdr
*hdr
;
8385 hdr
= &elf_tdata (flinfo
->output_bfd
)->symtab_hdr
;
8386 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
8387 amt
= flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8388 if (bfd_seek (flinfo
->output_bfd
, pos
, SEEK_SET
) != 0
8389 || bfd_bwrite (flinfo
->symbuf
, amt
, flinfo
->output_bfd
) != amt
)
8392 hdr
->sh_size
+= amt
;
8393 flinfo
->symbuf_count
= 0;
8399 /* Add a symbol to the output symbol table. */
8402 elf_link_output_sym (struct elf_final_link_info
*flinfo
,
8404 Elf_Internal_Sym
*elfsym
,
8405 asection
*input_sec
,
8406 struct elf_link_hash_entry
*h
)
8409 Elf_External_Sym_Shndx
*destshndx
;
8410 int (*output_symbol_hook
)
8411 (struct bfd_link_info
*, const char *, Elf_Internal_Sym
*, asection
*,
8412 struct elf_link_hash_entry
*);
8413 const struct elf_backend_data
*bed
;
8415 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8416 output_symbol_hook
= bed
->elf_backend_link_output_symbol_hook
;
8417 if (output_symbol_hook
!= NULL
)
8419 int ret
= (*output_symbol_hook
) (flinfo
->info
, name
, elfsym
, input_sec
, h
);
8424 if (name
== NULL
|| *name
== '\0')
8425 elfsym
->st_name
= 0;
8426 else if (input_sec
->flags
& SEC_EXCLUDE
)
8427 elfsym
->st_name
= 0;
8430 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (flinfo
->symstrtab
,
8432 if (elfsym
->st_name
== (unsigned long) -1)
8436 if (flinfo
->symbuf_count
>= flinfo
->symbuf_size
)
8438 if (! elf_link_flush_output_syms (flinfo
, bed
))
8442 dest
= flinfo
->symbuf
+ flinfo
->symbuf_count
* bed
->s
->sizeof_sym
;
8443 destshndx
= flinfo
->symshndxbuf
;
8444 if (destshndx
!= NULL
)
8446 if (bfd_get_symcount (flinfo
->output_bfd
) >= flinfo
->shndxbuf_size
)
8450 amt
= flinfo
->shndxbuf_size
* sizeof (Elf_External_Sym_Shndx
);
8451 destshndx
= (Elf_External_Sym_Shndx
*) bfd_realloc (destshndx
,
8453 if (destshndx
== NULL
)
8455 flinfo
->symshndxbuf
= destshndx
;
8456 memset ((char *) destshndx
+ amt
, 0, amt
);
8457 flinfo
->shndxbuf_size
*= 2;
8459 destshndx
+= bfd_get_symcount (flinfo
->output_bfd
);
8462 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, elfsym
, dest
, destshndx
);
8463 flinfo
->symbuf_count
+= 1;
8464 bfd_get_symcount (flinfo
->output_bfd
) += 1;
8469 /* Return TRUE if the dynamic symbol SYM in ABFD is supported. */
8472 check_dynsym (bfd
*abfd
, Elf_Internal_Sym
*sym
)
8474 if (sym
->st_shndx
>= (SHN_LORESERVE
& 0xffff)
8475 && sym
->st_shndx
< SHN_LORESERVE
)
8477 /* The gABI doesn't support dynamic symbols in output sections
8479 (*_bfd_error_handler
)
8480 (_("%B: Too many sections: %d (>= %d)"),
8481 abfd
, bfd_count_sections (abfd
), SHN_LORESERVE
& 0xffff);
8482 bfd_set_error (bfd_error_nonrepresentable_section
);
8488 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
8489 allowing an unsatisfied unversioned symbol in the DSO to match a
8490 versioned symbol that would normally require an explicit version.
8491 We also handle the case that a DSO references a hidden symbol
8492 which may be satisfied by a versioned symbol in another DSO. */
8495 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
8496 const struct elf_backend_data
*bed
,
8497 struct elf_link_hash_entry
*h
)
8500 struct elf_link_loaded_list
*loaded
;
8502 if (!is_elf_hash_table (info
->hash
))
8505 /* Check indirect symbol. */
8506 while (h
->root
.type
== bfd_link_hash_indirect
)
8507 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8509 switch (h
->root
.type
)
8515 case bfd_link_hash_undefined
:
8516 case bfd_link_hash_undefweak
:
8517 abfd
= h
->root
.u
.undef
.abfd
;
8518 if ((abfd
->flags
& DYNAMIC
) == 0
8519 || (elf_dyn_lib_class (abfd
) & DYN_DT_NEEDED
) == 0)
8523 case bfd_link_hash_defined
:
8524 case bfd_link_hash_defweak
:
8525 abfd
= h
->root
.u
.def
.section
->owner
;
8528 case bfd_link_hash_common
:
8529 abfd
= h
->root
.u
.c
.p
->section
->owner
;
8532 BFD_ASSERT (abfd
!= NULL
);
8534 for (loaded
= elf_hash_table (info
)->loaded
;
8536 loaded
= loaded
->next
)
8539 Elf_Internal_Shdr
*hdr
;
8540 bfd_size_type symcount
;
8541 bfd_size_type extsymcount
;
8542 bfd_size_type extsymoff
;
8543 Elf_Internal_Shdr
*versymhdr
;
8544 Elf_Internal_Sym
*isym
;
8545 Elf_Internal_Sym
*isymend
;
8546 Elf_Internal_Sym
*isymbuf
;
8547 Elf_External_Versym
*ever
;
8548 Elf_External_Versym
*extversym
;
8550 input
= loaded
->abfd
;
8552 /* We check each DSO for a possible hidden versioned definition. */
8554 || (input
->flags
& DYNAMIC
) == 0
8555 || elf_dynversym (input
) == 0)
8558 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
8560 symcount
= hdr
->sh_size
/ bed
->s
->sizeof_sym
;
8561 if (elf_bad_symtab (input
))
8563 extsymcount
= symcount
;
8568 extsymcount
= symcount
- hdr
->sh_info
;
8569 extsymoff
= hdr
->sh_info
;
8572 if (extsymcount
== 0)
8575 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
8577 if (isymbuf
== NULL
)
8580 /* Read in any version definitions. */
8581 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
8582 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
8583 if (extversym
== NULL
)
8586 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
8587 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
8588 != versymhdr
->sh_size
))
8596 ever
= extversym
+ extsymoff
;
8597 isymend
= isymbuf
+ extsymcount
;
8598 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
8601 Elf_Internal_Versym iver
;
8602 unsigned short version_index
;
8604 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
8605 || isym
->st_shndx
== SHN_UNDEF
)
8608 name
= bfd_elf_string_from_elf_section (input
,
8611 if (strcmp (name
, h
->root
.root
.string
) != 0)
8614 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
8616 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
8618 && h
->forced_local
))
8620 /* If we have a non-hidden versioned sym, then it should
8621 have provided a definition for the undefined sym unless
8622 it is defined in a non-shared object and forced local.
8627 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
8628 if (version_index
== 1 || version_index
== 2)
8630 /* This is the base or first version. We can use it. */
8644 /* Add an external symbol to the symbol table. This is called from
8645 the hash table traversal routine. When generating a shared object,
8646 we go through the symbol table twice. The first time we output
8647 anything that might have been forced to local scope in a version
8648 script. The second time we output the symbols that are still
8652 elf_link_output_extsym (struct bfd_hash_entry
*bh
, void *data
)
8654 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
8655 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
8656 struct elf_final_link_info
*flinfo
= eoinfo
->flinfo
;
8658 Elf_Internal_Sym sym
;
8659 asection
*input_sec
;
8660 const struct elf_backend_data
*bed
;
8664 if (h
->root
.type
== bfd_link_hash_warning
)
8666 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8667 if (h
->root
.type
== bfd_link_hash_new
)
8671 /* Decide whether to output this symbol in this pass. */
8672 if (eoinfo
->localsyms
)
8674 if (!h
->forced_local
)
8676 if (eoinfo
->second_pass
8677 && !((h
->root
.type
== bfd_link_hash_defined
8678 || h
->root
.type
== bfd_link_hash_defweak
)
8679 && h
->root
.u
.def
.section
->output_section
!= NULL
))
8684 if (h
->forced_local
)
8688 bed
= get_elf_backend_data (flinfo
->output_bfd
);
8690 if (h
->root
.type
== bfd_link_hash_undefined
)
8692 /* If we have an undefined symbol reference here then it must have
8693 come from a shared library that is being linked in. (Undefined
8694 references in regular files have already been handled unless
8695 they are in unreferenced sections which are removed by garbage
8697 bfd_boolean ignore_undef
= FALSE
;
8699 /* Some symbols may be special in that the fact that they're
8700 undefined can be safely ignored - let backend determine that. */
8701 if (bed
->elf_backend_ignore_undef_symbol
)
8702 ignore_undef
= bed
->elf_backend_ignore_undef_symbol (h
);
8704 /* If we are reporting errors for this situation then do so now. */
8707 && (!h
->ref_regular
|| flinfo
->info
->gc_sections
)
8708 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
)
8709 && flinfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
8711 if (!(flinfo
->info
->callbacks
->undefined_symbol
8712 (flinfo
->info
, h
->root
.root
.string
,
8713 h
->ref_regular
? NULL
: h
->root
.u
.undef
.abfd
,
8715 (flinfo
->info
->unresolved_syms_in_shared_libs
8716 == RM_GENERATE_ERROR
))))
8718 bfd_set_error (bfd_error_bad_value
);
8719 eoinfo
->failed
= TRUE
;
8725 /* We should also warn if a forced local symbol is referenced from
8726 shared libraries. */
8727 if (!flinfo
->info
->relocatable
8728 && flinfo
->info
->executable
8734 && !elf_link_check_versioned_symbol (flinfo
->info
, bed
, h
))
8738 struct elf_link_hash_entry
*hi
= h
;
8740 /* Check indirect symbol. */
8741 while (hi
->root
.type
== bfd_link_hash_indirect
)
8742 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
8744 if (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
)
8745 msg
= _("%B: internal symbol `%s' in %B is referenced by DSO");
8746 else if (ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
8747 msg
= _("%B: hidden symbol `%s' in %B is referenced by DSO");
8749 msg
= _("%B: local symbol `%s' in %B is referenced by DSO");
8750 def_bfd
= flinfo
->output_bfd
;
8751 if (hi
->root
.u
.def
.section
!= bfd_abs_section_ptr
)
8752 def_bfd
= hi
->root
.u
.def
.section
->owner
;
8753 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, def_bfd
,
8754 h
->root
.root
.string
);
8755 bfd_set_error (bfd_error_bad_value
);
8756 eoinfo
->failed
= TRUE
;
8760 /* We don't want to output symbols that have never been mentioned by
8761 a regular file, or that we have been told to strip. However, if
8762 h->indx is set to -2, the symbol is used by a reloc and we must
8766 else if ((h
->def_dynamic
8768 || h
->root
.type
== bfd_link_hash_new
)
8772 else if (flinfo
->info
->strip
== strip_all
)
8774 else if (flinfo
->info
->strip
== strip_some
8775 && bfd_hash_lookup (flinfo
->info
->keep_hash
,
8776 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
8778 else if ((h
->root
.type
== bfd_link_hash_defined
8779 || h
->root
.type
== bfd_link_hash_defweak
)
8780 && ((flinfo
->info
->strip_discarded
8781 && discarded_section (h
->root
.u
.def
.section
))
8782 || (h
->root
.u
.def
.section
->owner
!= NULL
8783 && (h
->root
.u
.def
.section
->owner
->flags
& BFD_PLUGIN
) != 0)))
8785 else if ((h
->root
.type
== bfd_link_hash_undefined
8786 || h
->root
.type
== bfd_link_hash_undefweak
)
8787 && h
->root
.u
.undef
.abfd
!= NULL
8788 && (h
->root
.u
.undef
.abfd
->flags
& BFD_PLUGIN
) != 0)
8793 /* If we're stripping it, and it's not a dynamic symbol, there's
8794 nothing else to do unless it is a forced local symbol or a
8795 STT_GNU_IFUNC symbol. */
8798 && h
->type
!= STT_GNU_IFUNC
8799 && !h
->forced_local
)
8803 sym
.st_size
= h
->size
;
8804 sym
.st_other
= h
->other
;
8805 if (h
->forced_local
)
8807 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
8808 /* Turn off visibility on local symbol. */
8809 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
8811 else if (h
->unique_global
)
8812 sym
.st_info
= ELF_ST_INFO (STB_GNU_UNIQUE
, h
->type
);
8813 else if (h
->root
.type
== bfd_link_hash_undefweak
8814 || h
->root
.type
== bfd_link_hash_defweak
)
8815 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
8817 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
8818 sym
.st_target_internal
= h
->target_internal
;
8820 switch (h
->root
.type
)
8823 case bfd_link_hash_new
:
8824 case bfd_link_hash_warning
:
8828 case bfd_link_hash_undefined
:
8829 case bfd_link_hash_undefweak
:
8830 input_sec
= bfd_und_section_ptr
;
8831 sym
.st_shndx
= SHN_UNDEF
;
8834 case bfd_link_hash_defined
:
8835 case bfd_link_hash_defweak
:
8837 input_sec
= h
->root
.u
.def
.section
;
8838 if (input_sec
->output_section
!= NULL
)
8840 if (eoinfo
->localsyms
&& flinfo
->filesym_count
== 1)
8842 bfd_boolean second_pass_sym
8843 = (input_sec
->owner
== flinfo
->output_bfd
8844 || input_sec
->owner
== NULL
8845 || (input_sec
->flags
& SEC_LINKER_CREATED
) != 0
8846 || (input_sec
->owner
->flags
& BFD_LINKER_CREATED
) != 0);
8848 eoinfo
->need_second_pass
|= second_pass_sym
;
8849 if (eoinfo
->second_pass
!= second_pass_sym
)
8854 _bfd_elf_section_from_bfd_section (flinfo
->output_bfd
,
8855 input_sec
->output_section
);
8856 if (sym
.st_shndx
== SHN_BAD
)
8858 (*_bfd_error_handler
)
8859 (_("%B: could not find output section %A for input section %A"),
8860 flinfo
->output_bfd
, input_sec
->output_section
, input_sec
);
8861 bfd_set_error (bfd_error_nonrepresentable_section
);
8862 eoinfo
->failed
= TRUE
;
8866 /* ELF symbols in relocatable files are section relative,
8867 but in nonrelocatable files they are virtual
8869 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
8870 if (!flinfo
->info
->relocatable
)
8872 sym
.st_value
+= input_sec
->output_section
->vma
;
8873 if (h
->type
== STT_TLS
)
8875 asection
*tls_sec
= elf_hash_table (flinfo
->info
)->tls_sec
;
8876 if (tls_sec
!= NULL
)
8877 sym
.st_value
-= tls_sec
->vma
;
8880 /* The TLS section may have been garbage collected. */
8881 BFD_ASSERT (flinfo
->info
->gc_sections
8882 && !input_sec
->gc_mark
);
8889 BFD_ASSERT (input_sec
->owner
== NULL
8890 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
8891 sym
.st_shndx
= SHN_UNDEF
;
8892 input_sec
= bfd_und_section_ptr
;
8897 case bfd_link_hash_common
:
8898 input_sec
= h
->root
.u
.c
.p
->section
;
8899 sym
.st_shndx
= bed
->common_section_index (input_sec
);
8900 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
8903 case bfd_link_hash_indirect
:
8904 /* These symbols are created by symbol versioning. They point
8905 to the decorated version of the name. For example, if the
8906 symbol foo@@GNU_1.2 is the default, which should be used when
8907 foo is used with no version, then we add an indirect symbol
8908 foo which points to foo@@GNU_1.2. We ignore these symbols,
8909 since the indirected symbol is already in the hash table. */
8913 /* Give the processor backend a chance to tweak the symbol value,
8914 and also to finish up anything that needs to be done for this
8915 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
8916 forced local syms when non-shared is due to a historical quirk.
8917 STT_GNU_IFUNC symbol must go through PLT. */
8918 if ((h
->type
== STT_GNU_IFUNC
8920 && !flinfo
->info
->relocatable
)
8921 || ((h
->dynindx
!= -1
8923 && ((flinfo
->info
->shared
8924 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8925 || h
->root
.type
!= bfd_link_hash_undefweak
))
8926 || !h
->forced_local
)
8927 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
))
8929 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
8930 (flinfo
->output_bfd
, flinfo
->info
, h
, &sym
)))
8932 eoinfo
->failed
= TRUE
;
8937 /* If we are marking the symbol as undefined, and there are no
8938 non-weak references to this symbol from a regular object, then
8939 mark the symbol as weak undefined; if there are non-weak
8940 references, mark the symbol as strong. We can't do this earlier,
8941 because it might not be marked as undefined until the
8942 finish_dynamic_symbol routine gets through with it. */
8943 if (sym
.st_shndx
== SHN_UNDEF
8945 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
8946 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
8949 unsigned int type
= ELF_ST_TYPE (sym
.st_info
);
8951 /* Turn an undefined IFUNC symbol into a normal FUNC symbol. */
8952 if (type
== STT_GNU_IFUNC
)
8955 if (h
->ref_regular_nonweak
)
8956 bindtype
= STB_GLOBAL
;
8958 bindtype
= STB_WEAK
;
8959 sym
.st_info
= ELF_ST_INFO (bindtype
, type
);
8962 /* If this is a symbol defined in a dynamic library, don't use the
8963 symbol size from the dynamic library. Relinking an executable
8964 against a new library may introduce gratuitous changes in the
8965 executable's symbols if we keep the size. */
8966 if (sym
.st_shndx
== SHN_UNDEF
8971 /* If a non-weak symbol with non-default visibility is not defined
8972 locally, it is a fatal error. */
8973 if (!flinfo
->info
->relocatable
8974 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
8975 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
8976 && h
->root
.type
== bfd_link_hash_undefined
8981 if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
)
8982 msg
= _("%B: protected symbol `%s' isn't defined");
8983 else if (ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
)
8984 msg
= _("%B: internal symbol `%s' isn't defined");
8986 msg
= _("%B: hidden symbol `%s' isn't defined");
8987 (*_bfd_error_handler
) (msg
, flinfo
->output_bfd
, h
->root
.root
.string
);
8988 bfd_set_error (bfd_error_bad_value
);
8989 eoinfo
->failed
= TRUE
;
8993 /* If this symbol should be put in the .dynsym section, then put it
8994 there now. We already know the symbol index. We also fill in
8995 the entry in the .hash section. */
8996 if (flinfo
->dynsym_sec
!= NULL
8998 && elf_hash_table (flinfo
->info
)->dynamic_sections_created
)
9002 /* Since there is no version information in the dynamic string,
9003 if there is no version info in symbol version section, we will
9004 have a run-time problem. */
9005 if (h
->verinfo
.verdef
== NULL
)
9007 char *p
= strrchr (h
->root
.root
.string
, ELF_VER_CHR
);
9009 if (p
&& p
[1] != '\0')
9011 (*_bfd_error_handler
)
9012 (_("%B: No symbol version section for versioned symbol `%s'"),
9013 flinfo
->output_bfd
, h
->root
.root
.string
);
9014 eoinfo
->failed
= TRUE
;
9019 sym
.st_name
= h
->dynstr_index
;
9020 esym
= flinfo
->dynsym_sec
->contents
+ h
->dynindx
* bed
->s
->sizeof_sym
;
9021 if (!check_dynsym (flinfo
->output_bfd
, &sym
))
9023 eoinfo
->failed
= TRUE
;
9026 bed
->s
->swap_symbol_out (flinfo
->output_bfd
, &sym
, esym
, 0);
9028 if (flinfo
->hash_sec
!= NULL
)
9030 size_t hash_entry_size
;
9031 bfd_byte
*bucketpos
;
9036 bucketcount
= elf_hash_table (flinfo
->info
)->bucketcount
;
9037 bucket
= h
->u
.elf_hash_value
% bucketcount
;
9040 = elf_section_data (flinfo
->hash_sec
)->this_hdr
.sh_entsize
;
9041 bucketpos
= ((bfd_byte
*) flinfo
->hash_sec
->contents
9042 + (bucket
+ 2) * hash_entry_size
);
9043 chain
= bfd_get (8 * hash_entry_size
, flinfo
->output_bfd
, bucketpos
);
9044 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, h
->dynindx
,
9046 bfd_put (8 * hash_entry_size
, flinfo
->output_bfd
, chain
,
9047 ((bfd_byte
*) flinfo
->hash_sec
->contents
9048 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
9051 if (flinfo
->symver_sec
!= NULL
&& flinfo
->symver_sec
->contents
!= NULL
)
9053 Elf_Internal_Versym iversym
;
9054 Elf_External_Versym
*eversym
;
9056 if (!h
->def_regular
)
9058 if (h
->verinfo
.verdef
== NULL
)
9059 iversym
.vs_vers
= 0;
9061 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
9065 if (h
->verinfo
.vertree
== NULL
)
9066 iversym
.vs_vers
= 1;
9068 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
9069 if (flinfo
->info
->create_default_symver
)
9074 iversym
.vs_vers
|= VERSYM_HIDDEN
;
9076 eversym
= (Elf_External_Versym
*) flinfo
->symver_sec
->contents
;
9077 eversym
+= h
->dynindx
;
9078 _bfd_elf_swap_versym_out (flinfo
->output_bfd
, &iversym
, eversym
);
9082 /* If we're stripping it, then it was just a dynamic symbol, and
9083 there's nothing else to do. */
9084 if (strip
|| (input_sec
->flags
& SEC_EXCLUDE
) != 0)
9087 indx
= bfd_get_symcount (flinfo
->output_bfd
);
9088 ret
= elf_link_output_sym (flinfo
, h
->root
.root
.string
, &sym
, input_sec
, h
);
9091 eoinfo
->failed
= TRUE
;
9096 else if (h
->indx
== -2)
9102 /* Return TRUE if special handling is done for relocs in SEC against
9103 symbols defined in discarded sections. */
9106 elf_section_ignore_discarded_relocs (asection
*sec
)
9108 const struct elf_backend_data
*bed
;
9110 switch (sec
->sec_info_type
)
9112 case SEC_INFO_TYPE_STABS
:
9113 case SEC_INFO_TYPE_EH_FRAME
:
9119 bed
= get_elf_backend_data (sec
->owner
);
9120 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
9121 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))
9127 /* Return a mask saying how ld should treat relocations in SEC against
9128 symbols defined in discarded sections. If this function returns
9129 COMPLAIN set, ld will issue a warning message. If this function
9130 returns PRETEND set, and the discarded section was link-once and the
9131 same size as the kept link-once section, ld will pretend that the
9132 symbol was actually defined in the kept section. Otherwise ld will
9133 zero the reloc (at least that is the intent, but some cooperation by
9134 the target dependent code is needed, particularly for REL targets). */
9137 _bfd_elf_default_action_discarded (asection
*sec
)
9139 if (sec
->flags
& SEC_DEBUGGING
)
9142 if (strcmp (".eh_frame", sec
->name
) == 0)
9145 if (strcmp (".gcc_except_table", sec
->name
) == 0)
9148 return COMPLAIN
| PRETEND
;
9151 /* Find a match between a section and a member of a section group. */
9154 match_group_member (asection
*sec
, asection
*group
,
9155 struct bfd_link_info
*info
)
9157 asection
*first
= elf_next_in_group (group
);
9158 asection
*s
= first
;
9162 if (bfd_elf_match_symbols_in_sections (s
, sec
, info
))
9165 s
= elf_next_in_group (s
);
9173 /* Check if the kept section of a discarded section SEC can be used
9174 to replace it. Return the replacement if it is OK. Otherwise return
9178 _bfd_elf_check_kept_section (asection
*sec
, struct bfd_link_info
*info
)
9182 kept
= sec
->kept_section
;
9185 if ((kept
->flags
& SEC_GROUP
) != 0)
9186 kept
= match_group_member (sec
, kept
, info
);
9188 && ((sec
->rawsize
!= 0 ? sec
->rawsize
: sec
->size
)
9189 != (kept
->rawsize
!= 0 ? kept
->rawsize
: kept
->size
)))
9191 sec
->kept_section
= kept
;
9196 /* Link an input file into the linker output file. This function
9197 handles all the sections and relocations of the input file at once.
9198 This is so that we only have to read the local symbols once, and
9199 don't have to keep them in memory. */
9202 elf_link_input_bfd (struct elf_final_link_info
*flinfo
, bfd
*input_bfd
)
9204 int (*relocate_section
)
9205 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
9206 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
9208 Elf_Internal_Shdr
*symtab_hdr
;
9211 Elf_Internal_Sym
*isymbuf
;
9212 Elf_Internal_Sym
*isym
;
9213 Elf_Internal_Sym
*isymend
;
9215 asection
**ppsection
;
9217 const struct elf_backend_data
*bed
;
9218 struct elf_link_hash_entry
**sym_hashes
;
9219 bfd_size_type address_size
;
9220 bfd_vma r_type_mask
;
9222 bfd_boolean have_file_sym
= FALSE
;
9224 output_bfd
= flinfo
->output_bfd
;
9225 bed
= get_elf_backend_data (output_bfd
);
9226 relocate_section
= bed
->elf_backend_relocate_section
;
9228 /* If this is a dynamic object, we don't want to do anything here:
9229 we don't want the local symbols, and we don't want the section
9231 if ((input_bfd
->flags
& DYNAMIC
) != 0)
9234 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
9235 if (elf_bad_symtab (input_bfd
))
9237 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
9242 locsymcount
= symtab_hdr
->sh_info
;
9243 extsymoff
= symtab_hdr
->sh_info
;
9246 /* Read the local symbols. */
9247 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
9248 if (isymbuf
== NULL
&& locsymcount
!= 0)
9250 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
9251 flinfo
->internal_syms
,
9252 flinfo
->external_syms
,
9253 flinfo
->locsym_shndx
);
9254 if (isymbuf
== NULL
)
9258 /* Find local symbol sections and adjust values of symbols in
9259 SEC_MERGE sections. Write out those local symbols we know are
9260 going into the output file. */
9261 isymend
= isymbuf
+ locsymcount
;
9262 for (isym
= isymbuf
, pindex
= flinfo
->indices
, ppsection
= flinfo
->sections
;
9264 isym
++, pindex
++, ppsection
++)
9268 Elf_Internal_Sym osym
;
9274 if (elf_bad_symtab (input_bfd
))
9276 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
9283 if (isym
->st_shndx
== SHN_UNDEF
)
9284 isec
= bfd_und_section_ptr
;
9285 else if (isym
->st_shndx
== SHN_ABS
)
9286 isec
= bfd_abs_section_ptr
;
9287 else if (isym
->st_shndx
== SHN_COMMON
)
9288 isec
= bfd_com_section_ptr
;
9291 isec
= bfd_section_from_elf_index (input_bfd
, isym
->st_shndx
);
9294 /* Don't attempt to output symbols with st_shnx in the
9295 reserved range other than SHN_ABS and SHN_COMMON. */
9299 else if (isec
->sec_info_type
== SEC_INFO_TYPE_MERGE
9300 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
9302 _bfd_merged_section_offset (output_bfd
, &isec
,
9303 elf_section_data (isec
)->sec_info
,
9309 /* Don't output the first, undefined, symbol. */
9310 if (ppsection
== flinfo
->sections
)
9313 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
9315 /* We never output section symbols. Instead, we use the
9316 section symbol of the corresponding section in the output
9321 /* If we are stripping all symbols, we don't want to output this
9323 if (flinfo
->info
->strip
== strip_all
)
9326 /* If we are discarding all local symbols, we don't want to
9327 output this one. If we are generating a relocatable output
9328 file, then some of the local symbols may be required by
9329 relocs; we output them below as we discover that they are
9331 if (flinfo
->info
->discard
== discard_all
)
9334 /* If this symbol is defined in a section which we are
9335 discarding, we don't need to keep it. */
9336 if (isym
->st_shndx
!= SHN_UNDEF
9337 && isym
->st_shndx
< SHN_LORESERVE
9338 && bfd_section_removed_from_list (output_bfd
,
9339 isec
->output_section
))
9342 /* Get the name of the symbol. */
9343 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
9348 /* See if we are discarding symbols with this name. */
9349 if ((flinfo
->info
->strip
== strip_some
9350 && (bfd_hash_lookup (flinfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
9352 || (((flinfo
->info
->discard
== discard_sec_merge
9353 && (isec
->flags
& SEC_MERGE
) && !flinfo
->info
->relocatable
)
9354 || flinfo
->info
->discard
== discard_l
)
9355 && bfd_is_local_label_name (input_bfd
, name
)))
9358 if (ELF_ST_TYPE (isym
->st_info
) == STT_FILE
)
9360 have_file_sym
= TRUE
;
9361 flinfo
->filesym_count
+= 1;
9365 /* In the absence of debug info, bfd_find_nearest_line uses
9366 FILE symbols to determine the source file for local
9367 function symbols. Provide a FILE symbol here if input
9368 files lack such, so that their symbols won't be
9369 associated with a previous input file. It's not the
9370 source file, but the best we can do. */
9371 have_file_sym
= TRUE
;
9372 flinfo
->filesym_count
+= 1;
9373 memset (&osym
, 0, sizeof (osym
));
9374 osym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
9375 osym
.st_shndx
= SHN_ABS
;
9376 if (!elf_link_output_sym (flinfo
, input_bfd
->filename
, &osym
,
9377 bfd_abs_section_ptr
, NULL
))
9383 /* Adjust the section index for the output file. */
9384 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9385 isec
->output_section
);
9386 if (osym
.st_shndx
== SHN_BAD
)
9389 /* ELF symbols in relocatable files are section relative, but
9390 in executable files they are virtual addresses. Note that
9391 this code assumes that all ELF sections have an associated
9392 BFD section with a reasonable value for output_offset; below
9393 we assume that they also have a reasonable value for
9394 output_section. Any special sections must be set up to meet
9395 these requirements. */
9396 osym
.st_value
+= isec
->output_offset
;
9397 if (!flinfo
->info
->relocatable
)
9399 osym
.st_value
+= isec
->output_section
->vma
;
9400 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
9402 /* STT_TLS symbols are relative to PT_TLS segment base. */
9403 BFD_ASSERT (elf_hash_table (flinfo
->info
)->tls_sec
!= NULL
);
9404 osym
.st_value
-= elf_hash_table (flinfo
->info
)->tls_sec
->vma
;
9408 indx
= bfd_get_symcount (output_bfd
);
9409 ret
= elf_link_output_sym (flinfo
, name
, &osym
, isec
, NULL
);
9416 if (bed
->s
->arch_size
== 32)
9424 r_type_mask
= 0xffffffff;
9429 /* Relocate the contents of each section. */
9430 sym_hashes
= elf_sym_hashes (input_bfd
);
9431 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
9435 if (! o
->linker_mark
)
9437 /* This section was omitted from the link. */
9441 if (flinfo
->info
->relocatable
9442 && (o
->flags
& (SEC_LINKER_CREATED
| SEC_GROUP
)) == SEC_GROUP
)
9444 /* Deal with the group signature symbol. */
9445 struct bfd_elf_section_data
*sec_data
= elf_section_data (o
);
9446 unsigned long symndx
= sec_data
->this_hdr
.sh_info
;
9447 asection
*osec
= o
->output_section
;
9449 if (symndx
>= locsymcount
9450 || (elf_bad_symtab (input_bfd
)
9451 && flinfo
->sections
[symndx
] == NULL
))
9453 struct elf_link_hash_entry
*h
= sym_hashes
[symndx
- extsymoff
];
9454 while (h
->root
.type
== bfd_link_hash_indirect
9455 || h
->root
.type
== bfd_link_hash_warning
)
9456 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9457 /* Arrange for symbol to be output. */
9459 elf_section_data (osec
)->this_hdr
.sh_info
= -2;
9461 else if (ELF_ST_TYPE (isymbuf
[symndx
].st_info
) == STT_SECTION
)
9463 /* We'll use the output section target_index. */
9464 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9465 elf_section_data (osec
)->this_hdr
.sh_info
= sec
->target_index
;
9469 if (flinfo
->indices
[symndx
] == -1)
9471 /* Otherwise output the local symbol now. */
9472 Elf_Internal_Sym sym
= isymbuf
[symndx
];
9473 asection
*sec
= flinfo
->sections
[symndx
]->output_section
;
9478 name
= bfd_elf_string_from_elf_section (input_bfd
,
9479 symtab_hdr
->sh_link
,
9484 sym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
9486 if (sym
.st_shndx
== SHN_BAD
)
9489 sym
.st_value
+= o
->output_offset
;
9491 indx
= bfd_get_symcount (output_bfd
);
9492 ret
= elf_link_output_sym (flinfo
, name
, &sym
, o
, NULL
);
9496 flinfo
->indices
[symndx
] = indx
;
9500 elf_section_data (osec
)->this_hdr
.sh_info
9501 = flinfo
->indices
[symndx
];
9505 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
9506 || (o
->size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
9509 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
9511 /* Section was created by _bfd_elf_link_create_dynamic_sections
9516 /* Get the contents of the section. They have been cached by a
9517 relaxation routine. Note that o is a section in an input
9518 file, so the contents field will not have been set by any of
9519 the routines which work on output files. */
9520 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
9521 contents
= elf_section_data (o
)->this_hdr
.contents
;
9524 contents
= flinfo
->contents
;
9525 if (! bfd_get_full_section_contents (input_bfd
, o
, &contents
))
9529 if ((o
->flags
& SEC_RELOC
) != 0)
9531 Elf_Internal_Rela
*internal_relocs
;
9532 Elf_Internal_Rela
*rel
, *relend
;
9533 int action_discarded
;
9536 /* Get the swapped relocs. */
9538 = _bfd_elf_link_read_relocs (input_bfd
, o
, flinfo
->external_relocs
,
9539 flinfo
->internal_relocs
, FALSE
);
9540 if (internal_relocs
== NULL
9541 && o
->reloc_count
> 0)
9544 /* We need to reverse-copy input .ctors/.dtors sections if
9545 they are placed in .init_array/.finit_array for output. */
9546 if (o
->size
> address_size
9547 && ((strncmp (o
->name
, ".ctors", 6) == 0
9548 && strcmp (o
->output_section
->name
,
9549 ".init_array") == 0)
9550 || (strncmp (o
->name
, ".dtors", 6) == 0
9551 && strcmp (o
->output_section
->name
,
9552 ".fini_array") == 0))
9553 && (o
->name
[6] == 0 || o
->name
[6] == '.'))
9555 if (o
->size
!= o
->reloc_count
* address_size
)
9557 (*_bfd_error_handler
)
9558 (_("error: %B: size of section %A is not "
9559 "multiple of address size"),
9561 bfd_set_error (bfd_error_on_input
);
9564 o
->flags
|= SEC_ELF_REVERSE_COPY
;
9567 action_discarded
= -1;
9568 if (!elf_section_ignore_discarded_relocs (o
))
9569 action_discarded
= (*bed
->action_discarded
) (o
);
9571 /* Run through the relocs evaluating complex reloc symbols and
9572 looking for relocs against symbols from discarded sections
9573 or section symbols from removed link-once sections.
9574 Complain about relocs against discarded sections. Zero
9575 relocs against removed link-once sections. */
9577 rel
= internal_relocs
;
9578 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9579 for ( ; rel
< relend
; rel
++)
9581 unsigned long r_symndx
= rel
->r_info
>> r_sym_shift
;
9582 unsigned int s_type
;
9583 asection
**ps
, *sec
;
9584 struct elf_link_hash_entry
*h
= NULL
;
9585 const char *sym_name
;
9587 if (r_symndx
== STN_UNDEF
)
9590 if (r_symndx
>= locsymcount
9591 || (elf_bad_symtab (input_bfd
)
9592 && flinfo
->sections
[r_symndx
] == NULL
))
9594 h
= sym_hashes
[r_symndx
- extsymoff
];
9596 /* Badly formatted input files can contain relocs that
9597 reference non-existant symbols. Check here so that
9598 we do not seg fault. */
9603 sprintf_vma (buffer
, rel
->r_info
);
9604 (*_bfd_error_handler
)
9605 (_("error: %B contains a reloc (0x%s) for section %A "
9606 "that references a non-existent global symbol"),
9607 input_bfd
, o
, buffer
);
9608 bfd_set_error (bfd_error_bad_value
);
9612 while (h
->root
.type
== bfd_link_hash_indirect
9613 || h
->root
.type
== bfd_link_hash_warning
)
9614 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
9619 if (h
->root
.type
== bfd_link_hash_defined
9620 || h
->root
.type
== bfd_link_hash_defweak
)
9621 ps
= &h
->root
.u
.def
.section
;
9623 sym_name
= h
->root
.root
.string
;
9627 Elf_Internal_Sym
*sym
= isymbuf
+ r_symndx
;
9629 s_type
= ELF_ST_TYPE (sym
->st_info
);
9630 ps
= &flinfo
->sections
[r_symndx
];
9631 sym_name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
9635 if ((s_type
== STT_RELC
|| s_type
== STT_SRELC
)
9636 && !flinfo
->info
->relocatable
)
9639 bfd_vma dot
= (rel
->r_offset
9640 + o
->output_offset
+ o
->output_section
->vma
);
9642 printf ("Encountered a complex symbol!");
9643 printf (" (input_bfd %s, section %s, reloc %ld\n",
9644 input_bfd
->filename
, o
->name
,
9645 (long) (rel
- internal_relocs
));
9646 printf (" symbol: idx %8.8lx, name %s\n",
9647 r_symndx
, sym_name
);
9648 printf (" reloc : info %8.8lx, addr %8.8lx\n",
9649 (unsigned long) rel
->r_info
,
9650 (unsigned long) rel
->r_offset
);
9652 if (!eval_symbol (&val
, &sym_name
, input_bfd
, flinfo
, dot
,
9653 isymbuf
, locsymcount
, s_type
== STT_SRELC
))
9656 /* Symbol evaluated OK. Update to absolute value. */
9657 set_symbol_value (input_bfd
, isymbuf
, locsymcount
,
9662 if (action_discarded
!= -1 && ps
!= NULL
)
9664 /* Complain if the definition comes from a
9665 discarded section. */
9666 if ((sec
= *ps
) != NULL
&& discarded_section (sec
))
9668 BFD_ASSERT (r_symndx
!= STN_UNDEF
);
9669 if (action_discarded
& COMPLAIN
)
9670 (*flinfo
->info
->callbacks
->einfo
)
9671 (_("%X`%s' referenced in section `%A' of %B: "
9672 "defined in discarded section `%A' of %B\n"),
9673 sym_name
, o
, input_bfd
, sec
, sec
->owner
);
9675 /* Try to do the best we can to support buggy old
9676 versions of gcc. Pretend that the symbol is
9677 really defined in the kept linkonce section.
9678 FIXME: This is quite broken. Modifying the
9679 symbol here means we will be changing all later
9680 uses of the symbol, not just in this section. */
9681 if (action_discarded
& PRETEND
)
9685 kept
= _bfd_elf_check_kept_section (sec
,
9697 /* Relocate the section by invoking a back end routine.
9699 The back end routine is responsible for adjusting the
9700 section contents as necessary, and (if using Rela relocs
9701 and generating a relocatable output file) adjusting the
9702 reloc addend as necessary.
9704 The back end routine does not have to worry about setting
9705 the reloc address or the reloc symbol index.
9707 The back end routine is given a pointer to the swapped in
9708 internal symbols, and can access the hash table entries
9709 for the external symbols via elf_sym_hashes (input_bfd).
9711 When generating relocatable output, the back end routine
9712 must handle STB_LOCAL/STT_SECTION symbols specially. The
9713 output symbol is going to be a section symbol
9714 corresponding to the output section, which will require
9715 the addend to be adjusted. */
9717 ret
= (*relocate_section
) (output_bfd
, flinfo
->info
,
9718 input_bfd
, o
, contents
,
9726 || flinfo
->info
->relocatable
9727 || flinfo
->info
->emitrelocations
)
9729 Elf_Internal_Rela
*irela
;
9730 Elf_Internal_Rela
*irelaend
, *irelamid
;
9731 bfd_vma last_offset
;
9732 struct elf_link_hash_entry
**rel_hash
;
9733 struct elf_link_hash_entry
**rel_hash_list
, **rela_hash_list
;
9734 Elf_Internal_Shdr
*input_rel_hdr
, *input_rela_hdr
;
9735 unsigned int next_erel
;
9736 bfd_boolean rela_normal
;
9737 struct bfd_elf_section_data
*esdi
, *esdo
;
9739 esdi
= elf_section_data (o
);
9740 esdo
= elf_section_data (o
->output_section
);
9741 rela_normal
= FALSE
;
9743 /* Adjust the reloc addresses and symbol indices. */
9745 irela
= internal_relocs
;
9746 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
9747 rel_hash
= esdo
->rel
.hashes
+ esdo
->rel
.count
;
9748 /* We start processing the REL relocs, if any. When we reach
9749 IRELAMID in the loop, we switch to the RELA relocs. */
9751 if (esdi
->rel
.hdr
!= NULL
)
9752 irelamid
+= (NUM_SHDR_ENTRIES (esdi
->rel
.hdr
)
9753 * bed
->s
->int_rels_per_ext_rel
);
9754 rel_hash_list
= rel_hash
;
9755 rela_hash_list
= NULL
;
9756 last_offset
= o
->output_offset
;
9757 if (!flinfo
->info
->relocatable
)
9758 last_offset
+= o
->output_section
->vma
;
9759 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
9761 unsigned long r_symndx
;
9763 Elf_Internal_Sym sym
;
9765 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
9771 if (irela
== irelamid
)
9773 rel_hash
= esdo
->rela
.hashes
+ esdo
->rela
.count
;
9774 rela_hash_list
= rel_hash
;
9775 rela_normal
= bed
->rela_normal
;
9778 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
9781 if (irela
->r_offset
>= (bfd_vma
) -2)
9783 /* This is a reloc for a deleted entry or somesuch.
9784 Turn it into an R_*_NONE reloc, at the same
9785 offset as the last reloc. elf_eh_frame.c and
9786 bfd_elf_discard_info rely on reloc offsets
9788 irela
->r_offset
= last_offset
;
9790 irela
->r_addend
= 0;
9794 irela
->r_offset
+= o
->output_offset
;
9796 /* Relocs in an executable have to be virtual addresses. */
9797 if (!flinfo
->info
->relocatable
)
9798 irela
->r_offset
+= o
->output_section
->vma
;
9800 last_offset
= irela
->r_offset
;
9802 r_symndx
= irela
->r_info
>> r_sym_shift
;
9803 if (r_symndx
== STN_UNDEF
)
9806 if (r_symndx
>= locsymcount
9807 || (elf_bad_symtab (input_bfd
)
9808 && flinfo
->sections
[r_symndx
] == NULL
))
9810 struct elf_link_hash_entry
*rh
;
9813 /* This is a reloc against a global symbol. We
9814 have not yet output all the local symbols, so
9815 we do not know the symbol index of any global
9816 symbol. We set the rel_hash entry for this
9817 reloc to point to the global hash table entry
9818 for this symbol. The symbol index is then
9819 set at the end of bfd_elf_final_link. */
9820 indx
= r_symndx
- extsymoff
;
9821 rh
= elf_sym_hashes (input_bfd
)[indx
];
9822 while (rh
->root
.type
== bfd_link_hash_indirect
9823 || rh
->root
.type
== bfd_link_hash_warning
)
9824 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
9826 /* Setting the index to -2 tells
9827 elf_link_output_extsym that this symbol is
9829 BFD_ASSERT (rh
->indx
< 0);
9837 /* This is a reloc against a local symbol. */
9840 sym
= isymbuf
[r_symndx
];
9841 sec
= flinfo
->sections
[r_symndx
];
9842 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
9844 /* I suppose the backend ought to fill in the
9845 section of any STT_SECTION symbol against a
9846 processor specific section. */
9847 r_symndx
= STN_UNDEF
;
9848 if (bfd_is_abs_section (sec
))
9850 else if (sec
== NULL
|| sec
->owner
== NULL
)
9852 bfd_set_error (bfd_error_bad_value
);
9857 asection
*osec
= sec
->output_section
;
9859 /* If we have discarded a section, the output
9860 section will be the absolute section. In
9861 case of discarded SEC_MERGE sections, use
9862 the kept section. relocate_section should
9863 have already handled discarded linkonce
9865 if (bfd_is_abs_section (osec
)
9866 && sec
->kept_section
!= NULL
9867 && sec
->kept_section
->output_section
!= NULL
)
9869 osec
= sec
->kept_section
->output_section
;
9870 irela
->r_addend
-= osec
->vma
;
9873 if (!bfd_is_abs_section (osec
))
9875 r_symndx
= osec
->target_index
;
9876 if (r_symndx
== STN_UNDEF
)
9878 irela
->r_addend
+= osec
->vma
;
9879 osec
= _bfd_nearby_section (output_bfd
, osec
,
9881 irela
->r_addend
-= osec
->vma
;
9882 r_symndx
= osec
->target_index
;
9887 /* Adjust the addend according to where the
9888 section winds up in the output section. */
9890 irela
->r_addend
+= sec
->output_offset
;
9894 if (flinfo
->indices
[r_symndx
] == -1)
9896 unsigned long shlink
;
9901 if (flinfo
->info
->strip
== strip_all
)
9903 /* You can't do ld -r -s. */
9904 bfd_set_error (bfd_error_invalid_operation
);
9908 /* This symbol was skipped earlier, but
9909 since it is needed by a reloc, we
9910 must output it now. */
9911 shlink
= symtab_hdr
->sh_link
;
9912 name
= (bfd_elf_string_from_elf_section
9913 (input_bfd
, shlink
, sym
.st_name
));
9917 osec
= sec
->output_section
;
9919 _bfd_elf_section_from_bfd_section (output_bfd
,
9921 if (sym
.st_shndx
== SHN_BAD
)
9924 sym
.st_value
+= sec
->output_offset
;
9925 if (!flinfo
->info
->relocatable
)
9927 sym
.st_value
+= osec
->vma
;
9928 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
9930 /* STT_TLS symbols are relative to PT_TLS
9932 BFD_ASSERT (elf_hash_table (flinfo
->info
)
9934 sym
.st_value
-= (elf_hash_table (flinfo
->info
)
9939 indx
= bfd_get_symcount (output_bfd
);
9940 ret
= elf_link_output_sym (flinfo
, name
, &sym
, sec
,
9945 flinfo
->indices
[r_symndx
] = indx
;
9950 r_symndx
= flinfo
->indices
[r_symndx
];
9953 irela
->r_info
= ((bfd_vma
) r_symndx
<< r_sym_shift
9954 | (irela
->r_info
& r_type_mask
));
9957 /* Swap out the relocs. */
9958 input_rel_hdr
= esdi
->rel
.hdr
;
9959 if (input_rel_hdr
&& input_rel_hdr
->sh_size
!= 0)
9961 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
9966 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
9967 * bed
->s
->int_rels_per_ext_rel
);
9968 rel_hash_list
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
9971 input_rela_hdr
= esdi
->rela
.hdr
;
9972 if (input_rela_hdr
&& input_rela_hdr
->sh_size
!= 0)
9974 if (!bed
->elf_backend_emit_relocs (output_bfd
, o
,
9983 /* Write out the modified section contents. */
9984 if (bed
->elf_backend_write_section
9985 && (*bed
->elf_backend_write_section
) (output_bfd
, flinfo
->info
, o
,
9988 /* Section written out. */
9990 else switch (o
->sec_info_type
)
9992 case SEC_INFO_TYPE_STABS
:
9993 if (! (_bfd_write_section_stabs
9995 &elf_hash_table (flinfo
->info
)->stab_info
,
9996 o
, &elf_section_data (o
)->sec_info
, contents
)))
9999 case SEC_INFO_TYPE_MERGE
:
10000 if (! _bfd_write_merged_section (output_bfd
, o
,
10001 elf_section_data (o
)->sec_info
))
10004 case SEC_INFO_TYPE_EH_FRAME
:
10006 if (! _bfd_elf_write_section_eh_frame (output_bfd
, flinfo
->info
,
10013 /* FIXME: octets_per_byte. */
10014 if (! (o
->flags
& SEC_EXCLUDE
))
10016 file_ptr offset
= (file_ptr
) o
->output_offset
;
10017 bfd_size_type todo
= o
->size
;
10018 if ((o
->flags
& SEC_ELF_REVERSE_COPY
))
10020 /* Reverse-copy input section to output. */
10023 todo
-= address_size
;
10024 if (! bfd_set_section_contents (output_bfd
,
10032 offset
+= address_size
;
10036 else if (! bfd_set_section_contents (output_bfd
,
10050 /* Generate a reloc when linking an ELF file. This is a reloc
10051 requested by the linker, and does not come from any input file. This
10052 is used to build constructor and destructor tables when linking
10056 elf_reloc_link_order (bfd
*output_bfd
,
10057 struct bfd_link_info
*info
,
10058 asection
*output_section
,
10059 struct bfd_link_order
*link_order
)
10061 reloc_howto_type
*howto
;
10065 struct bfd_elf_section_reloc_data
*reldata
;
10066 struct elf_link_hash_entry
**rel_hash_ptr
;
10067 Elf_Internal_Shdr
*rel_hdr
;
10068 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
10069 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
10072 struct bfd_elf_section_data
*esdo
= elf_section_data (output_section
);
10074 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
10077 bfd_set_error (bfd_error_bad_value
);
10081 addend
= link_order
->u
.reloc
.p
->addend
;
10084 reldata
= &esdo
->rel
;
10085 else if (esdo
->rela
.hdr
)
10086 reldata
= &esdo
->rela
;
10093 /* Figure out the symbol index. */
10094 rel_hash_ptr
= reldata
->hashes
+ reldata
->count
;
10095 if (link_order
->type
== bfd_section_reloc_link_order
)
10097 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
10098 BFD_ASSERT (indx
!= 0);
10099 *rel_hash_ptr
= NULL
;
10103 struct elf_link_hash_entry
*h
;
10105 /* Treat a reloc against a defined symbol as though it were
10106 actually against the section. */
10107 h
= ((struct elf_link_hash_entry
*)
10108 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
10109 link_order
->u
.reloc
.p
->u
.name
,
10110 FALSE
, FALSE
, TRUE
));
10112 && (h
->root
.type
== bfd_link_hash_defined
10113 || h
->root
.type
== bfd_link_hash_defweak
))
10117 section
= h
->root
.u
.def
.section
;
10118 indx
= section
->output_section
->target_index
;
10119 *rel_hash_ptr
= NULL
;
10120 /* It seems that we ought to add the symbol value to the
10121 addend here, but in practice it has already been added
10122 because it was passed to constructor_callback. */
10123 addend
+= section
->output_section
->vma
+ section
->output_offset
;
10125 else if (h
!= NULL
)
10127 /* Setting the index to -2 tells elf_link_output_extsym that
10128 this symbol is used by a reloc. */
10135 if (! ((*info
->callbacks
->unattached_reloc
)
10136 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0)))
10142 /* If this is an inplace reloc, we must write the addend into the
10144 if (howto
->partial_inplace
&& addend
!= 0)
10146 bfd_size_type size
;
10147 bfd_reloc_status_type rstat
;
10150 const char *sym_name
;
10152 size
= (bfd_size_type
) bfd_get_reloc_size (howto
);
10153 buf
= (bfd_byte
*) bfd_zmalloc (size
);
10156 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
10163 case bfd_reloc_outofrange
:
10166 case bfd_reloc_overflow
:
10167 if (link_order
->type
== bfd_section_reloc_link_order
)
10168 sym_name
= bfd_section_name (output_bfd
,
10169 link_order
->u
.reloc
.p
->u
.section
);
10171 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
10172 if (! ((*info
->callbacks
->reloc_overflow
)
10173 (info
, NULL
, sym_name
, howto
->name
, addend
, NULL
,
10174 NULL
, (bfd_vma
) 0)))
10181 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
10182 link_order
->offset
, size
);
10188 /* The address of a reloc is relative to the section in a
10189 relocatable file, and is a virtual address in an executable
10191 offset
= link_order
->offset
;
10192 if (! info
->relocatable
)
10193 offset
+= output_section
->vma
;
10195 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
10197 irel
[i
].r_offset
= offset
;
10198 irel
[i
].r_info
= 0;
10199 irel
[i
].r_addend
= 0;
10201 if (bed
->s
->arch_size
== 32)
10202 irel
[0].r_info
= ELF32_R_INFO (indx
, howto
->type
);
10204 irel
[0].r_info
= ELF64_R_INFO (indx
, howto
->type
);
10206 rel_hdr
= reldata
->hdr
;
10207 erel
= rel_hdr
->contents
;
10208 if (rel_hdr
->sh_type
== SHT_REL
)
10210 erel
+= reldata
->count
* bed
->s
->sizeof_rel
;
10211 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
10215 irel
[0].r_addend
= addend
;
10216 erel
+= reldata
->count
* bed
->s
->sizeof_rela
;
10217 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
10226 /* Get the output vma of the section pointed to by the sh_link field. */
10229 elf_get_linked_section_vma (struct bfd_link_order
*p
)
10231 Elf_Internal_Shdr
**elf_shdrp
;
10235 s
= p
->u
.indirect
.section
;
10236 elf_shdrp
= elf_elfsections (s
->owner
);
10237 elfsec
= _bfd_elf_section_from_bfd_section (s
->owner
, s
);
10238 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
10240 The Intel C compiler generates SHT_IA_64_UNWIND with
10241 SHF_LINK_ORDER. But it doesn't set the sh_link or
10242 sh_info fields. Hence we could get the situation
10243 where elfsec is 0. */
10246 const struct elf_backend_data
*bed
10247 = get_elf_backend_data (s
->owner
);
10248 if (bed
->link_order_error_handler
)
10249 bed
->link_order_error_handler
10250 (_("%B: warning: sh_link not set for section `%A'"), s
->owner
, s
);
10255 s
= elf_shdrp
[elfsec
]->bfd_section
;
10256 return s
->output_section
->vma
+ s
->output_offset
;
10261 /* Compare two sections based on the locations of the sections they are
10262 linked to. Used by elf_fixup_link_order. */
10265 compare_link_order (const void * a
, const void * b
)
10270 apos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)a
);
10271 bpos
= elf_get_linked_section_vma (*(struct bfd_link_order
**)b
);
10274 return apos
> bpos
;
10278 /* Looks for sections with SHF_LINK_ORDER set. Rearranges them into the same
10279 order as their linked sections. Returns false if this could not be done
10280 because an output section includes both ordered and unordered
10281 sections. Ideally we'd do this in the linker proper. */
10284 elf_fixup_link_order (bfd
*abfd
, asection
*o
)
10286 int seen_linkorder
;
10289 struct bfd_link_order
*p
;
10291 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10293 struct bfd_link_order
**sections
;
10294 asection
*s
, *other_sec
, *linkorder_sec
;
10298 linkorder_sec
= NULL
;
10300 seen_linkorder
= 0;
10301 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10303 if (p
->type
== bfd_indirect_link_order
)
10305 s
= p
->u
.indirect
.section
;
10307 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10308 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
10309 && (elfsec
= _bfd_elf_section_from_bfd_section (sub
, s
))
10310 && elfsec
< elf_numsections (sub
)
10311 && elf_elfsections (sub
)[elfsec
]->sh_flags
& SHF_LINK_ORDER
10312 && elf_elfsections (sub
)[elfsec
]->sh_link
< elf_numsections (sub
))
10326 if (seen_other
&& seen_linkorder
)
10328 if (other_sec
&& linkorder_sec
)
10329 (*_bfd_error_handler
) (_("%A has both ordered [`%A' in %B] and unordered [`%A' in %B] sections"),
10331 linkorder_sec
->owner
, other_sec
,
10334 (*_bfd_error_handler
) (_("%A has both ordered and unordered sections"),
10336 bfd_set_error (bfd_error_bad_value
);
10341 if (!seen_linkorder
)
10344 sections
= (struct bfd_link_order
**)
10345 bfd_malloc (seen_linkorder
* sizeof (struct bfd_link_order
*));
10346 if (sections
== NULL
)
10348 seen_linkorder
= 0;
10350 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10352 sections
[seen_linkorder
++] = p
;
10354 /* Sort the input sections in the order of their linked section. */
10355 qsort (sections
, seen_linkorder
, sizeof (struct bfd_link_order
*),
10356 compare_link_order
);
10358 /* Change the offsets of the sections. */
10360 for (n
= 0; n
< seen_linkorder
; n
++)
10362 s
= sections
[n
]->u
.indirect
.section
;
10363 offset
&= ~(bfd_vma
) 0 << s
->alignment_power
;
10364 s
->output_offset
= offset
;
10365 sections
[n
]->offset
= offset
;
10366 /* FIXME: octets_per_byte. */
10367 offset
+= sections
[n
]->size
;
10375 /* Do the final step of an ELF link. */
10378 bfd_elf_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
10380 bfd_boolean dynamic
;
10381 bfd_boolean emit_relocs
;
10383 struct elf_final_link_info flinfo
;
10385 struct bfd_link_order
*p
;
10387 bfd_size_type max_contents_size
;
10388 bfd_size_type max_external_reloc_size
;
10389 bfd_size_type max_internal_reloc_count
;
10390 bfd_size_type max_sym_count
;
10391 bfd_size_type max_sym_shndx_count
;
10393 Elf_Internal_Sym elfsym
;
10395 Elf_Internal_Shdr
*symtab_hdr
;
10396 Elf_Internal_Shdr
*symtab_shndx_hdr
;
10397 Elf_Internal_Shdr
*symstrtab_hdr
;
10398 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
10399 struct elf_outext_info eoinfo
;
10400 bfd_boolean merged
;
10401 size_t relativecount
= 0;
10402 asection
*reldyn
= 0;
10404 asection
*attr_section
= NULL
;
10405 bfd_vma attr_size
= 0;
10406 const char *std_attrs_section
;
10408 if (! is_elf_hash_table (info
->hash
))
10412 abfd
->flags
|= DYNAMIC
;
10414 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
10415 dynobj
= elf_hash_table (info
)->dynobj
;
10417 emit_relocs
= (info
->relocatable
10418 || info
->emitrelocations
);
10420 flinfo
.info
= info
;
10421 flinfo
.output_bfd
= abfd
;
10422 flinfo
.symstrtab
= _bfd_elf_stringtab_init ();
10423 if (flinfo
.symstrtab
== NULL
)
10428 flinfo
.dynsym_sec
= NULL
;
10429 flinfo
.hash_sec
= NULL
;
10430 flinfo
.symver_sec
= NULL
;
10434 flinfo
.dynsym_sec
= bfd_get_linker_section (dynobj
, ".dynsym");
10435 flinfo
.hash_sec
= bfd_get_linker_section (dynobj
, ".hash");
10436 /* Note that dynsym_sec can be NULL (on VMS). */
10437 flinfo
.symver_sec
= bfd_get_linker_section (dynobj
, ".gnu.version");
10438 /* Note that it is OK if symver_sec is NULL. */
10441 flinfo
.contents
= NULL
;
10442 flinfo
.external_relocs
= NULL
;
10443 flinfo
.internal_relocs
= NULL
;
10444 flinfo
.external_syms
= NULL
;
10445 flinfo
.locsym_shndx
= NULL
;
10446 flinfo
.internal_syms
= NULL
;
10447 flinfo
.indices
= NULL
;
10448 flinfo
.sections
= NULL
;
10449 flinfo
.symbuf
= NULL
;
10450 flinfo
.symshndxbuf
= NULL
;
10451 flinfo
.symbuf_count
= 0;
10452 flinfo
.shndxbuf_size
= 0;
10453 flinfo
.filesym_count
= 0;
10455 /* The object attributes have been merged. Remove the input
10456 sections from the link, and set the contents of the output
10458 std_attrs_section
= get_elf_backend_data (abfd
)->obj_attrs_section
;
10459 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10461 if ((std_attrs_section
&& strcmp (o
->name
, std_attrs_section
) == 0)
10462 || strcmp (o
->name
, ".gnu.attributes") == 0)
10464 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10466 asection
*input_section
;
10468 if (p
->type
!= bfd_indirect_link_order
)
10470 input_section
= p
->u
.indirect
.section
;
10471 /* Hack: reset the SEC_HAS_CONTENTS flag so that
10472 elf_link_input_bfd ignores this section. */
10473 input_section
->flags
&= ~SEC_HAS_CONTENTS
;
10476 attr_size
= bfd_elf_obj_attr_size (abfd
);
10479 bfd_set_section_size (abfd
, o
, attr_size
);
10481 /* Skip this section later on. */
10482 o
->map_head
.link_order
= NULL
;
10485 o
->flags
|= SEC_EXCLUDE
;
10489 /* Count up the number of relocations we will output for each output
10490 section, so that we know the sizes of the reloc sections. We
10491 also figure out some maximum sizes. */
10492 max_contents_size
= 0;
10493 max_external_reloc_size
= 0;
10494 max_internal_reloc_count
= 0;
10496 max_sym_shndx_count
= 0;
10498 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10500 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10501 o
->reloc_count
= 0;
10503 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10505 unsigned int reloc_count
= 0;
10506 struct bfd_elf_section_data
*esdi
= NULL
;
10508 if (p
->type
== bfd_section_reloc_link_order
10509 || p
->type
== bfd_symbol_reloc_link_order
)
10511 else if (p
->type
== bfd_indirect_link_order
)
10515 sec
= p
->u
.indirect
.section
;
10516 esdi
= elf_section_data (sec
);
10518 /* Mark all sections which are to be included in the
10519 link. This will normally be every section. We need
10520 to do this so that we can identify any sections which
10521 the linker has decided to not include. */
10522 sec
->linker_mark
= TRUE
;
10524 if (sec
->flags
& SEC_MERGE
)
10527 if (esdo
->this_hdr
.sh_type
== SHT_REL
10528 || esdo
->this_hdr
.sh_type
== SHT_RELA
)
10529 /* Some backends use reloc_count in relocation sections
10530 to count particular types of relocs. Of course,
10531 reloc sections themselves can't have relocations. */
10533 else if (info
->relocatable
|| info
->emitrelocations
)
10534 reloc_count
= sec
->reloc_count
;
10535 else if (bed
->elf_backend_count_relocs
)
10536 reloc_count
= (*bed
->elf_backend_count_relocs
) (info
, sec
);
10538 if (sec
->rawsize
> max_contents_size
)
10539 max_contents_size
= sec
->rawsize
;
10540 if (sec
->size
> max_contents_size
)
10541 max_contents_size
= sec
->size
;
10543 /* We are interested in just local symbols, not all
10545 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
10546 && (sec
->owner
->flags
& DYNAMIC
) == 0)
10550 if (elf_bad_symtab (sec
->owner
))
10551 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
10552 / bed
->s
->sizeof_sym
);
10554 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
10556 if (sym_count
> max_sym_count
)
10557 max_sym_count
= sym_count
;
10559 if (sym_count
> max_sym_shndx_count
10560 && elf_symtab_shndx (sec
->owner
) != 0)
10561 max_sym_shndx_count
= sym_count
;
10563 if ((sec
->flags
& SEC_RELOC
) != 0)
10565 size_t ext_size
= 0;
10567 if (esdi
->rel
.hdr
!= NULL
)
10568 ext_size
= esdi
->rel
.hdr
->sh_size
;
10569 if (esdi
->rela
.hdr
!= NULL
)
10570 ext_size
+= esdi
->rela
.hdr
->sh_size
;
10572 if (ext_size
> max_external_reloc_size
)
10573 max_external_reloc_size
= ext_size
;
10574 if (sec
->reloc_count
> max_internal_reloc_count
)
10575 max_internal_reloc_count
= sec
->reloc_count
;
10580 if (reloc_count
== 0)
10583 o
->reloc_count
+= reloc_count
;
10585 if (p
->type
== bfd_indirect_link_order
10586 && (info
->relocatable
|| info
->emitrelocations
))
10589 esdo
->rel
.count
+= NUM_SHDR_ENTRIES (esdi
->rel
.hdr
);
10590 if (esdi
->rela
.hdr
)
10591 esdo
->rela
.count
+= NUM_SHDR_ENTRIES (esdi
->rela
.hdr
);
10596 esdo
->rela
.count
+= reloc_count
;
10598 esdo
->rel
.count
+= reloc_count
;
10602 if (o
->reloc_count
> 0)
10603 o
->flags
|= SEC_RELOC
;
10606 /* Explicitly clear the SEC_RELOC flag. The linker tends to
10607 set it (this is probably a bug) and if it is set
10608 assign_section_numbers will create a reloc section. */
10609 o
->flags
&=~ SEC_RELOC
;
10612 /* If the SEC_ALLOC flag is not set, force the section VMA to
10613 zero. This is done in elf_fake_sections as well, but forcing
10614 the VMA to 0 here will ensure that relocs against these
10615 sections are handled correctly. */
10616 if ((o
->flags
& SEC_ALLOC
) == 0
10617 && ! o
->user_set_vma
)
10621 if (! info
->relocatable
&& merged
)
10622 elf_link_hash_traverse (elf_hash_table (info
),
10623 _bfd_elf_link_sec_merge_syms
, abfd
);
10625 /* Figure out the file positions for everything but the symbol table
10626 and the relocs. We set symcount to force assign_section_numbers
10627 to create a symbol table. */
10628 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
10629 BFD_ASSERT (! abfd
->output_has_begun
);
10630 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
10633 /* Set sizes, and assign file positions for reloc sections. */
10634 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10636 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
10637 if ((o
->flags
& SEC_RELOC
) != 0)
10640 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rel
)))
10644 && !(_bfd_elf_link_size_reloc_section (abfd
, &esdo
->rela
)))
10648 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
10649 to count upwards while actually outputting the relocations. */
10650 esdo
->rel
.count
= 0;
10651 esdo
->rela
.count
= 0;
10654 _bfd_elf_assign_file_positions_for_relocs (abfd
);
10656 /* We have now assigned file positions for all the sections except
10657 .symtab and .strtab. We start the .symtab section at the current
10658 file position, and write directly to it. We build the .strtab
10659 section in memory. */
10660 bfd_get_symcount (abfd
) = 0;
10661 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
10662 /* sh_name is set in prep_headers. */
10663 symtab_hdr
->sh_type
= SHT_SYMTAB
;
10664 /* sh_flags, sh_addr and sh_size all start off zero. */
10665 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
10666 /* sh_link is set in assign_section_numbers. */
10667 /* sh_info is set below. */
10668 /* sh_offset is set just below. */
10669 symtab_hdr
->sh_addralign
= (bfd_vma
) 1 << bed
->s
->log_file_align
;
10671 off
= elf_tdata (abfd
)->next_file_pos
;
10672 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
10674 /* Note that at this point elf_tdata (abfd)->next_file_pos is
10675 incorrect. We do not yet know the size of the .symtab section.
10676 We correct next_file_pos below, after we do know the size. */
10678 /* Allocate a buffer to hold swapped out symbols. This is to avoid
10679 continuously seeking to the right position in the file. */
10680 if (! info
->keep_memory
|| max_sym_count
< 20)
10681 flinfo
.symbuf_size
= 20;
10683 flinfo
.symbuf_size
= max_sym_count
;
10684 amt
= flinfo
.symbuf_size
;
10685 amt
*= bed
->s
->sizeof_sym
;
10686 flinfo
.symbuf
= (bfd_byte
*) bfd_malloc (amt
);
10687 if (flinfo
.symbuf
== NULL
)
10689 if (elf_numsections (abfd
) > (SHN_LORESERVE
& 0xFFFF))
10691 /* Wild guess at number of output symbols. realloc'd as needed. */
10692 amt
= 2 * max_sym_count
+ elf_numsections (abfd
) + 1000;
10693 flinfo
.shndxbuf_size
= amt
;
10694 amt
*= sizeof (Elf_External_Sym_Shndx
);
10695 flinfo
.symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
10696 if (flinfo
.symshndxbuf
== NULL
)
10700 /* Start writing out the symbol table. The first symbol is always a
10702 if (info
->strip
!= strip_all
10705 elfsym
.st_value
= 0;
10706 elfsym
.st_size
= 0;
10707 elfsym
.st_info
= 0;
10708 elfsym
.st_other
= 0;
10709 elfsym
.st_shndx
= SHN_UNDEF
;
10710 elfsym
.st_target_internal
= 0;
10711 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, bfd_und_section_ptr
,
10716 /* Output a symbol for each section. We output these even if we are
10717 discarding local symbols, since they are used for relocs. These
10718 symbols have no names. We store the index of each one in the
10719 index field of the section, so that we can find it again when
10720 outputting relocs. */
10721 if (info
->strip
!= strip_all
10724 elfsym
.st_size
= 0;
10725 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
10726 elfsym
.st_other
= 0;
10727 elfsym
.st_value
= 0;
10728 elfsym
.st_target_internal
= 0;
10729 for (i
= 1; i
< elf_numsections (abfd
); i
++)
10731 o
= bfd_section_from_elf_index (abfd
, i
);
10734 o
->target_index
= bfd_get_symcount (abfd
);
10735 elfsym
.st_shndx
= i
;
10736 if (!info
->relocatable
)
10737 elfsym
.st_value
= o
->vma
;
10738 if (elf_link_output_sym (&flinfo
, NULL
, &elfsym
, o
, NULL
) != 1)
10744 /* Allocate some memory to hold information read in from the input
10746 if (max_contents_size
!= 0)
10748 flinfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
10749 if (flinfo
.contents
== NULL
)
10753 if (max_external_reloc_size
!= 0)
10755 flinfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
10756 if (flinfo
.external_relocs
== NULL
)
10760 if (max_internal_reloc_count
!= 0)
10762 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
10763 amt
*= sizeof (Elf_Internal_Rela
);
10764 flinfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
10765 if (flinfo
.internal_relocs
== NULL
)
10769 if (max_sym_count
!= 0)
10771 amt
= max_sym_count
* bed
->s
->sizeof_sym
;
10772 flinfo
.external_syms
= (bfd_byte
*) bfd_malloc (amt
);
10773 if (flinfo
.external_syms
== NULL
)
10776 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
10777 flinfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
10778 if (flinfo
.internal_syms
== NULL
)
10781 amt
= max_sym_count
* sizeof (long);
10782 flinfo
.indices
= (long int *) bfd_malloc (amt
);
10783 if (flinfo
.indices
== NULL
)
10786 amt
= max_sym_count
* sizeof (asection
*);
10787 flinfo
.sections
= (asection
**) bfd_malloc (amt
);
10788 if (flinfo
.sections
== NULL
)
10792 if (max_sym_shndx_count
!= 0)
10794 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
10795 flinfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
10796 if (flinfo
.locsym_shndx
== NULL
)
10800 if (elf_hash_table (info
)->tls_sec
)
10802 bfd_vma base
, end
= 0;
10805 for (sec
= elf_hash_table (info
)->tls_sec
;
10806 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
10809 bfd_size_type size
= sec
->size
;
10812 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
10814 struct bfd_link_order
*ord
= sec
->map_tail
.link_order
;
10817 size
= ord
->offset
+ ord
->size
;
10819 end
= sec
->vma
+ size
;
10821 base
= elf_hash_table (info
)->tls_sec
->vma
;
10822 /* Only align end of TLS section if static TLS doesn't have special
10823 alignment requirements. */
10824 if (bed
->static_tls_alignment
== 1)
10825 end
= align_power (end
,
10826 elf_hash_table (info
)->tls_sec
->alignment_power
);
10827 elf_hash_table (info
)->tls_size
= end
- base
;
10830 /* Reorder SHF_LINK_ORDER sections. */
10831 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10833 if (!elf_fixup_link_order (abfd
, o
))
10837 /* Since ELF permits relocations to be against local symbols, we
10838 must have the local symbols available when we do the relocations.
10839 Since we would rather only read the local symbols once, and we
10840 would rather not keep them in memory, we handle all the
10841 relocations for a single input file at the same time.
10843 Unfortunately, there is no way to know the total number of local
10844 symbols until we have seen all of them, and the local symbol
10845 indices precede the global symbol indices. This means that when
10846 we are generating relocatable output, and we see a reloc against
10847 a global symbol, we can not know the symbol index until we have
10848 finished examining all the local symbols to see which ones we are
10849 going to output. To deal with this, we keep the relocations in
10850 memory, and don't output them until the end of the link. This is
10851 an unfortunate waste of memory, but I don't see a good way around
10852 it. Fortunately, it only happens when performing a relocatable
10853 link, which is not the common case. FIXME: If keep_memory is set
10854 we could write the relocs out and then read them again; I don't
10855 know how bad the memory loss will be. */
10857 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10858 sub
->output_has_begun
= FALSE
;
10859 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
10861 for (p
= o
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
10863 if (p
->type
== bfd_indirect_link_order
10864 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
10865 == bfd_target_elf_flavour
)
10866 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
10868 if (! sub
->output_has_begun
)
10870 if (! elf_link_input_bfd (&flinfo
, sub
))
10872 sub
->output_has_begun
= TRUE
;
10875 else if (p
->type
== bfd_section_reloc_link_order
10876 || p
->type
== bfd_symbol_reloc_link_order
)
10878 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
10883 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
10885 if (p
->type
== bfd_indirect_link_order
10886 && (bfd_get_flavour (sub
)
10887 == bfd_target_elf_flavour
)
10888 && (elf_elfheader (sub
)->e_ident
[EI_CLASS
]
10889 != bed
->s
->elfclass
))
10891 const char *iclass
, *oclass
;
10893 if (bed
->s
->elfclass
== ELFCLASS64
)
10895 iclass
= "ELFCLASS32";
10896 oclass
= "ELFCLASS64";
10900 iclass
= "ELFCLASS64";
10901 oclass
= "ELFCLASS32";
10904 bfd_set_error (bfd_error_wrong_format
);
10905 (*_bfd_error_handler
)
10906 (_("%B: file class %s incompatible with %s"),
10907 sub
, iclass
, oclass
);
10916 /* Free symbol buffer if needed. */
10917 if (!info
->reduce_memory_overheads
)
10919 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
10920 if (bfd_get_flavour (sub
) == bfd_target_elf_flavour
10921 && elf_tdata (sub
)->symbuf
)
10923 free (elf_tdata (sub
)->symbuf
);
10924 elf_tdata (sub
)->symbuf
= NULL
;
10928 /* Output a FILE symbol so that following locals are not associated
10929 with the wrong input file. */
10930 memset (&elfsym
, 0, sizeof (elfsym
));
10931 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
10932 elfsym
.st_shndx
= SHN_ABS
;
10934 if (flinfo
.filesym_count
> 1
10935 && !elf_link_output_sym (&flinfo
, NULL
, &elfsym
,
10936 bfd_und_section_ptr
, NULL
))
10939 /* Output any global symbols that got converted to local in a
10940 version script or due to symbol visibility. We do this in a
10941 separate step since ELF requires all local symbols to appear
10942 prior to any global symbols. FIXME: We should only do this if
10943 some global symbols were, in fact, converted to become local.
10944 FIXME: Will this work correctly with the Irix 5 linker? */
10945 eoinfo
.failed
= FALSE
;
10946 eoinfo
.flinfo
= &flinfo
;
10947 eoinfo
.localsyms
= TRUE
;
10948 eoinfo
.need_second_pass
= FALSE
;
10949 eoinfo
.second_pass
= FALSE
;
10950 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
10954 if (flinfo
.filesym_count
== 1
10955 && !elf_link_output_sym (&flinfo
, NULL
, &elfsym
,
10956 bfd_und_section_ptr
, NULL
))
10959 if (eoinfo
.need_second_pass
)
10961 eoinfo
.second_pass
= TRUE
;
10962 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
10967 /* If backend needs to output some local symbols not present in the hash
10968 table, do it now. */
10969 if (bed
->elf_backend_output_arch_local_syms
)
10971 typedef int (*out_sym_func
)
10972 (void *, const char *, Elf_Internal_Sym
*, asection
*,
10973 struct elf_link_hash_entry
*);
10975 if (! ((*bed
->elf_backend_output_arch_local_syms
)
10976 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
10980 /* That wrote out all the local symbols. Finish up the symbol table
10981 with the global symbols. Even if we want to strip everything we
10982 can, we still need to deal with those global symbols that got
10983 converted to local in a version script. */
10985 /* The sh_info field records the index of the first non local symbol. */
10986 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
10989 && flinfo
.dynsym_sec
!= NULL
10990 && flinfo
.dynsym_sec
->output_section
!= bfd_abs_section_ptr
)
10992 Elf_Internal_Sym sym
;
10993 bfd_byte
*dynsym
= flinfo
.dynsym_sec
->contents
;
10994 long last_local
= 0;
10996 /* Write out the section symbols for the output sections. */
10997 if (info
->shared
|| elf_hash_table (info
)->is_relocatable_executable
)
11003 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
11005 sym
.st_target_internal
= 0;
11007 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
11013 dynindx
= elf_section_data (s
)->dynindx
;
11016 indx
= elf_section_data (s
)->this_idx
;
11017 BFD_ASSERT (indx
> 0);
11018 sym
.st_shndx
= indx
;
11019 if (! check_dynsym (abfd
, &sym
))
11021 sym
.st_value
= s
->vma
;
11022 dest
= dynsym
+ dynindx
* bed
->s
->sizeof_sym
;
11023 if (last_local
< dynindx
)
11024 last_local
= dynindx
;
11025 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11029 /* Write out the local dynsyms. */
11030 if (elf_hash_table (info
)->dynlocal
)
11032 struct elf_link_local_dynamic_entry
*e
;
11033 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
11038 /* Copy the internal symbol and turn off visibility.
11039 Note that we saved a word of storage and overwrote
11040 the original st_name with the dynstr_index. */
11042 sym
.st_other
&= ~ELF_ST_VISIBILITY (-1);
11044 s
= bfd_section_from_elf_index (e
->input_bfd
,
11049 elf_section_data (s
->output_section
)->this_idx
;
11050 if (! check_dynsym (abfd
, &sym
))
11052 sym
.st_value
= (s
->output_section
->vma
11054 + e
->isym
.st_value
);
11057 if (last_local
< e
->dynindx
)
11058 last_local
= e
->dynindx
;
11060 dest
= dynsym
+ e
->dynindx
* bed
->s
->sizeof_sym
;
11061 bed
->s
->swap_symbol_out (abfd
, &sym
, dest
, 0);
11065 elf_section_data (flinfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
11069 /* We get the global symbols from the hash table. */
11070 eoinfo
.failed
= FALSE
;
11071 eoinfo
.localsyms
= FALSE
;
11072 eoinfo
.flinfo
= &flinfo
;
11073 bfd_hash_traverse (&info
->hash
->table
, elf_link_output_extsym
, &eoinfo
);
11077 /* If backend needs to output some symbols not present in the hash
11078 table, do it now. */
11079 if (bed
->elf_backend_output_arch_syms
)
11081 typedef int (*out_sym_func
)
11082 (void *, const char *, Elf_Internal_Sym
*, asection
*,
11083 struct elf_link_hash_entry
*);
11085 if (! ((*bed
->elf_backend_output_arch_syms
)
11086 (abfd
, info
, &flinfo
, (out_sym_func
) elf_link_output_sym
)))
11090 /* Flush all symbols to the file. */
11091 if (! elf_link_flush_output_syms (&flinfo
, bed
))
11094 /* Now we know the size of the symtab section. */
11095 off
+= symtab_hdr
->sh_size
;
11097 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
11098 if (symtab_shndx_hdr
->sh_name
!= 0)
11100 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
11101 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
11102 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
11103 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
11104 symtab_shndx_hdr
->sh_size
= amt
;
11106 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
11109 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
11110 || (bfd_bwrite (flinfo
.symshndxbuf
, amt
, abfd
) != amt
))
11115 /* Finish up and write out the symbol string table (.strtab)
11117 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
11118 /* sh_name was set in prep_headers. */
11119 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
11120 symstrtab_hdr
->sh_flags
= 0;
11121 symstrtab_hdr
->sh_addr
= 0;
11122 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (flinfo
.symstrtab
);
11123 symstrtab_hdr
->sh_entsize
= 0;
11124 symstrtab_hdr
->sh_link
= 0;
11125 symstrtab_hdr
->sh_info
= 0;
11126 /* sh_offset is set just below. */
11127 symstrtab_hdr
->sh_addralign
= 1;
11129 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, TRUE
);
11130 elf_tdata (abfd
)->next_file_pos
= off
;
11132 if (bfd_get_symcount (abfd
) > 0)
11134 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
11135 || ! _bfd_stringtab_emit (abfd
, flinfo
.symstrtab
))
11139 /* Adjust the relocs to have the correct symbol indices. */
11140 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11142 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11143 if ((o
->flags
& SEC_RELOC
) == 0)
11146 if (esdo
->rel
.hdr
!= NULL
)
11147 elf_link_adjust_relocs (abfd
, &esdo
->rel
);
11148 if (esdo
->rela
.hdr
!= NULL
)
11149 elf_link_adjust_relocs (abfd
, &esdo
->rela
);
11151 /* Set the reloc_count field to 0 to prevent write_relocs from
11152 trying to swap the relocs out itself. */
11153 o
->reloc_count
= 0;
11156 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
11157 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
11159 /* If we are linking against a dynamic object, or generating a
11160 shared library, finish up the dynamic linking information. */
11163 bfd_byte
*dyncon
, *dynconend
;
11165 /* Fix up .dynamic entries. */
11166 o
= bfd_get_linker_section (dynobj
, ".dynamic");
11167 BFD_ASSERT (o
!= NULL
);
11169 dyncon
= o
->contents
;
11170 dynconend
= o
->contents
+ o
->size
;
11171 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11173 Elf_Internal_Dyn dyn
;
11177 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11184 if (relativecount
> 0 && dyncon
+ bed
->s
->sizeof_dyn
< dynconend
)
11186 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
11188 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
11189 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
11192 dyn
.d_un
.d_val
= relativecount
;
11199 name
= info
->init_function
;
11202 name
= info
->fini_function
;
11205 struct elf_link_hash_entry
*h
;
11207 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
11208 FALSE
, FALSE
, TRUE
);
11210 && (h
->root
.type
== bfd_link_hash_defined
11211 || h
->root
.type
== bfd_link_hash_defweak
))
11213 dyn
.d_un
.d_ptr
= h
->root
.u
.def
.value
;
11214 o
= h
->root
.u
.def
.section
;
11215 if (o
->output_section
!= NULL
)
11216 dyn
.d_un
.d_ptr
+= (o
->output_section
->vma
11217 + o
->output_offset
);
11220 /* The symbol is imported from another shared
11221 library and does not apply to this one. */
11222 dyn
.d_un
.d_ptr
= 0;
11229 case DT_PREINIT_ARRAYSZ
:
11230 name
= ".preinit_array";
11232 case DT_INIT_ARRAYSZ
:
11233 name
= ".init_array";
11235 case DT_FINI_ARRAYSZ
:
11236 name
= ".fini_array";
11238 o
= bfd_get_section_by_name (abfd
, name
);
11241 (*_bfd_error_handler
)
11242 (_("%B: could not find output section %s"), abfd
, name
);
11246 (*_bfd_error_handler
)
11247 (_("warning: %s section has zero size"), name
);
11248 dyn
.d_un
.d_val
= o
->size
;
11251 case DT_PREINIT_ARRAY
:
11252 name
= ".preinit_array";
11254 case DT_INIT_ARRAY
:
11255 name
= ".init_array";
11257 case DT_FINI_ARRAY
:
11258 name
= ".fini_array";
11265 name
= ".gnu.hash";
11274 name
= ".gnu.version_d";
11277 name
= ".gnu.version_r";
11280 name
= ".gnu.version";
11282 o
= bfd_get_section_by_name (abfd
, name
);
11285 (*_bfd_error_handler
)
11286 (_("%B: could not find output section %s"), abfd
, name
);
11289 if (elf_section_data (o
->output_section
)->this_hdr
.sh_type
== SHT_NOTE
)
11291 (*_bfd_error_handler
)
11292 (_("warning: section '%s' is being made into a note"), name
);
11293 bfd_set_error (bfd_error_nonrepresentable_section
);
11296 dyn
.d_un
.d_ptr
= o
->vma
;
11303 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
11307 dyn
.d_un
.d_val
= 0;
11308 dyn
.d_un
.d_ptr
= 0;
11309 for (i
= 1; i
< elf_numsections (abfd
); i
++)
11311 Elf_Internal_Shdr
*hdr
;
11313 hdr
= elf_elfsections (abfd
)[i
];
11314 if (hdr
->sh_type
== type
11315 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
11317 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
11318 dyn
.d_un
.d_val
+= hdr
->sh_size
;
11321 if (dyn
.d_un
.d_ptr
== 0
11322 || hdr
->sh_addr
< dyn
.d_un
.d_ptr
)
11323 dyn
.d_un
.d_ptr
= hdr
->sh_addr
;
11329 bed
->s
->swap_dyn_out (dynobj
, &dyn
, dyncon
);
11333 /* If we have created any dynamic sections, then output them. */
11334 if (dynobj
!= NULL
)
11336 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
11339 /* Check for DT_TEXTREL (late, in case the backend removes it). */
11340 if (((info
->warn_shared_textrel
&& info
->shared
)
11341 || info
->error_textrel
)
11342 && (o
= bfd_get_linker_section (dynobj
, ".dynamic")) != NULL
)
11344 bfd_byte
*dyncon
, *dynconend
;
11346 dyncon
= o
->contents
;
11347 dynconend
= o
->contents
+ o
->size
;
11348 for (; dyncon
< dynconend
; dyncon
+= bed
->s
->sizeof_dyn
)
11350 Elf_Internal_Dyn dyn
;
11352 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
11354 if (dyn
.d_tag
== DT_TEXTREL
)
11356 if (info
->error_textrel
)
11357 info
->callbacks
->einfo
11358 (_("%P%X: read-only segment has dynamic relocations.\n"));
11360 info
->callbacks
->einfo
11361 (_("%P: warning: creating a DT_TEXTREL in a shared object.\n"));
11367 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
11369 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
11371 || o
->output_section
== bfd_abs_section_ptr
)
11373 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
11375 /* At this point, we are only interested in sections
11376 created by _bfd_elf_link_create_dynamic_sections. */
11379 if (elf_hash_table (info
)->stab_info
.stabstr
== o
)
11381 if (elf_hash_table (info
)->eh_info
.hdr_sec
== o
)
11383 if (strcmp (o
->name
, ".dynstr") != 0)
11385 /* FIXME: octets_per_byte. */
11386 if (! bfd_set_section_contents (abfd
, o
->output_section
,
11388 (file_ptr
) o
->output_offset
,
11394 /* The contents of the .dynstr section are actually in a
11396 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
11397 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
11398 || ! _bfd_elf_strtab_emit (abfd
,
11399 elf_hash_table (info
)->dynstr
))
11405 if (info
->relocatable
)
11407 bfd_boolean failed
= FALSE
;
11409 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
11414 /* If we have optimized stabs strings, output them. */
11415 if (elf_hash_table (info
)->stab_info
.stabstr
!= NULL
)
11417 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
11421 if (info
->eh_frame_hdr
)
11423 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
11427 if (flinfo
.symstrtab
!= NULL
)
11428 _bfd_stringtab_free (flinfo
.symstrtab
);
11429 if (flinfo
.contents
!= NULL
)
11430 free (flinfo
.contents
);
11431 if (flinfo
.external_relocs
!= NULL
)
11432 free (flinfo
.external_relocs
);
11433 if (flinfo
.internal_relocs
!= NULL
)
11434 free (flinfo
.internal_relocs
);
11435 if (flinfo
.external_syms
!= NULL
)
11436 free (flinfo
.external_syms
);
11437 if (flinfo
.locsym_shndx
!= NULL
)
11438 free (flinfo
.locsym_shndx
);
11439 if (flinfo
.internal_syms
!= NULL
)
11440 free (flinfo
.internal_syms
);
11441 if (flinfo
.indices
!= NULL
)
11442 free (flinfo
.indices
);
11443 if (flinfo
.sections
!= NULL
)
11444 free (flinfo
.sections
);
11445 if (flinfo
.symbuf
!= NULL
)
11446 free (flinfo
.symbuf
);
11447 if (flinfo
.symshndxbuf
!= NULL
)
11448 free (flinfo
.symshndxbuf
);
11449 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11451 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11452 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
11453 free (esdo
->rel
.hashes
);
11454 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
11455 free (esdo
->rela
.hashes
);
11458 elf_tdata (abfd
)->linker
= TRUE
;
11462 bfd_byte
*contents
= (bfd_byte
*) bfd_malloc (attr_size
);
11463 if (contents
== NULL
)
11464 return FALSE
; /* Bail out and fail. */
11465 bfd_elf_set_obj_attr_contents (abfd
, contents
, attr_size
);
11466 bfd_set_section_contents (abfd
, attr_section
, contents
, 0, attr_size
);
11473 if (flinfo
.symstrtab
!= NULL
)
11474 _bfd_stringtab_free (flinfo
.symstrtab
);
11475 if (flinfo
.contents
!= NULL
)
11476 free (flinfo
.contents
);
11477 if (flinfo
.external_relocs
!= NULL
)
11478 free (flinfo
.external_relocs
);
11479 if (flinfo
.internal_relocs
!= NULL
)
11480 free (flinfo
.internal_relocs
);
11481 if (flinfo
.external_syms
!= NULL
)
11482 free (flinfo
.external_syms
);
11483 if (flinfo
.locsym_shndx
!= NULL
)
11484 free (flinfo
.locsym_shndx
);
11485 if (flinfo
.internal_syms
!= NULL
)
11486 free (flinfo
.internal_syms
);
11487 if (flinfo
.indices
!= NULL
)
11488 free (flinfo
.indices
);
11489 if (flinfo
.sections
!= NULL
)
11490 free (flinfo
.sections
);
11491 if (flinfo
.symbuf
!= NULL
)
11492 free (flinfo
.symbuf
);
11493 if (flinfo
.symshndxbuf
!= NULL
)
11494 free (flinfo
.symshndxbuf
);
11495 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
11497 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
11498 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rel
.hashes
!= NULL
)
11499 free (esdo
->rel
.hashes
);
11500 if ((o
->flags
& SEC_RELOC
) != 0 && esdo
->rela
.hashes
!= NULL
)
11501 free (esdo
->rela
.hashes
);
11507 /* Initialize COOKIE for input bfd ABFD. */
11510 init_reloc_cookie (struct elf_reloc_cookie
*cookie
,
11511 struct bfd_link_info
*info
, bfd
*abfd
)
11513 Elf_Internal_Shdr
*symtab_hdr
;
11514 const struct elf_backend_data
*bed
;
11516 bed
= get_elf_backend_data (abfd
);
11517 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11519 cookie
->abfd
= abfd
;
11520 cookie
->sym_hashes
= elf_sym_hashes (abfd
);
11521 cookie
->bad_symtab
= elf_bad_symtab (abfd
);
11522 if (cookie
->bad_symtab
)
11524 cookie
->locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
11525 cookie
->extsymoff
= 0;
11529 cookie
->locsymcount
= symtab_hdr
->sh_info
;
11530 cookie
->extsymoff
= symtab_hdr
->sh_info
;
11533 if (bed
->s
->arch_size
== 32)
11534 cookie
->r_sym_shift
= 8;
11536 cookie
->r_sym_shift
= 32;
11538 cookie
->locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
11539 if (cookie
->locsyms
== NULL
&& cookie
->locsymcount
!= 0)
11541 cookie
->locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
11542 cookie
->locsymcount
, 0,
11544 if (cookie
->locsyms
== NULL
)
11546 info
->callbacks
->einfo (_("%P%X: can not read symbols: %E\n"));
11549 if (info
->keep_memory
)
11550 symtab_hdr
->contents
= (bfd_byte
*) cookie
->locsyms
;
11555 /* Free the memory allocated by init_reloc_cookie, if appropriate. */
11558 fini_reloc_cookie (struct elf_reloc_cookie
*cookie
, bfd
*abfd
)
11560 Elf_Internal_Shdr
*symtab_hdr
;
11562 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
11563 if (cookie
->locsyms
!= NULL
11564 && symtab_hdr
->contents
!= (unsigned char *) cookie
->locsyms
)
11565 free (cookie
->locsyms
);
11568 /* Initialize the relocation information in COOKIE for input section SEC
11569 of input bfd ABFD. */
11572 init_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11573 struct bfd_link_info
*info
, bfd
*abfd
,
11576 const struct elf_backend_data
*bed
;
11578 if (sec
->reloc_count
== 0)
11580 cookie
->rels
= NULL
;
11581 cookie
->relend
= NULL
;
11585 bed
= get_elf_backend_data (abfd
);
11587 cookie
->rels
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
11588 info
->keep_memory
);
11589 if (cookie
->rels
== NULL
)
11591 cookie
->rel
= cookie
->rels
;
11592 cookie
->relend
= (cookie
->rels
11593 + sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
);
11595 cookie
->rel
= cookie
->rels
;
11599 /* Free the memory allocated by init_reloc_cookie_rels,
11603 fini_reloc_cookie_rels (struct elf_reloc_cookie
*cookie
,
11606 if (cookie
->rels
&& elf_section_data (sec
)->relocs
!= cookie
->rels
)
11607 free (cookie
->rels
);
11610 /* Initialize the whole of COOKIE for input section SEC. */
11613 init_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11614 struct bfd_link_info
*info
,
11617 if (!init_reloc_cookie (cookie
, info
, sec
->owner
))
11619 if (!init_reloc_cookie_rels (cookie
, info
, sec
->owner
, sec
))
11624 fini_reloc_cookie (cookie
, sec
->owner
);
11629 /* Free the memory allocated by init_reloc_cookie_for_section,
11633 fini_reloc_cookie_for_section (struct elf_reloc_cookie
*cookie
,
11636 fini_reloc_cookie_rels (cookie
, sec
);
11637 fini_reloc_cookie (cookie
, sec
->owner
);
11640 /* Garbage collect unused sections. */
11642 /* Default gc_mark_hook. */
11645 _bfd_elf_gc_mark_hook (asection
*sec
,
11646 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
11647 Elf_Internal_Rela
*rel ATTRIBUTE_UNUSED
,
11648 struct elf_link_hash_entry
*h
,
11649 Elf_Internal_Sym
*sym
)
11651 const char *sec_name
;
11655 switch (h
->root
.type
)
11657 case bfd_link_hash_defined
:
11658 case bfd_link_hash_defweak
:
11659 return h
->root
.u
.def
.section
;
11661 case bfd_link_hash_common
:
11662 return h
->root
.u
.c
.p
->section
;
11664 case bfd_link_hash_undefined
:
11665 case bfd_link_hash_undefweak
:
11666 /* To work around a glibc bug, keep all XXX input sections
11667 when there is an as yet undefined reference to __start_XXX
11668 or __stop_XXX symbols. The linker will later define such
11669 symbols for orphan input sections that have a name
11670 representable as a C identifier. */
11671 if (strncmp (h
->root
.root
.string
, "__start_", 8) == 0)
11672 sec_name
= h
->root
.root
.string
+ 8;
11673 else if (strncmp (h
->root
.root
.string
, "__stop_", 7) == 0)
11674 sec_name
= h
->root
.root
.string
+ 7;
11678 if (sec_name
&& *sec_name
!= '\0')
11682 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
11684 sec
= bfd_get_section_by_name (i
, sec_name
);
11686 sec
->flags
|= SEC_KEEP
;
11696 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
11701 /* COOKIE->rel describes a relocation against section SEC, which is
11702 a section we've decided to keep. Return the section that contains
11703 the relocation symbol, or NULL if no section contains it. */
11706 _bfd_elf_gc_mark_rsec (struct bfd_link_info
*info
, asection
*sec
,
11707 elf_gc_mark_hook_fn gc_mark_hook
,
11708 struct elf_reloc_cookie
*cookie
)
11710 unsigned long r_symndx
;
11711 struct elf_link_hash_entry
*h
;
11713 r_symndx
= cookie
->rel
->r_info
>> cookie
->r_sym_shift
;
11714 if (r_symndx
== STN_UNDEF
)
11717 if (r_symndx
>= cookie
->locsymcount
11718 || ELF_ST_BIND (cookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
11720 h
= cookie
->sym_hashes
[r_symndx
- cookie
->extsymoff
];
11721 while (h
->root
.type
== bfd_link_hash_indirect
11722 || h
->root
.type
== bfd_link_hash_warning
)
11723 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
11725 /* If this symbol is weak and there is a non-weak definition, we
11726 keep the non-weak definition because many backends put
11727 dynamic reloc info on the non-weak definition for code
11728 handling copy relocs. */
11729 if (h
->u
.weakdef
!= NULL
)
11730 h
->u
.weakdef
->mark
= 1;
11731 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, h
, NULL
);
11734 return (*gc_mark_hook
) (sec
, info
, cookie
->rel
, NULL
,
11735 &cookie
->locsyms
[r_symndx
]);
11738 /* COOKIE->rel describes a relocation against section SEC, which is
11739 a section we've decided to keep. Mark the section that contains
11740 the relocation symbol. */
11743 _bfd_elf_gc_mark_reloc (struct bfd_link_info
*info
,
11745 elf_gc_mark_hook_fn gc_mark_hook
,
11746 struct elf_reloc_cookie
*cookie
)
11750 rsec
= _bfd_elf_gc_mark_rsec (info
, sec
, gc_mark_hook
, cookie
);
11751 if (rsec
&& !rsec
->gc_mark
)
11753 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
11754 || (rsec
->owner
->flags
& DYNAMIC
) != 0)
11756 else if (!_bfd_elf_gc_mark (info
, rsec
, gc_mark_hook
))
11762 /* The mark phase of garbage collection. For a given section, mark
11763 it and any sections in this section's group, and all the sections
11764 which define symbols to which it refers. */
11767 _bfd_elf_gc_mark (struct bfd_link_info
*info
,
11769 elf_gc_mark_hook_fn gc_mark_hook
)
11772 asection
*group_sec
, *eh_frame
;
11776 /* Mark all the sections in the group. */
11777 group_sec
= elf_section_data (sec
)->next_in_group
;
11778 if (group_sec
&& !group_sec
->gc_mark
)
11779 if (!_bfd_elf_gc_mark (info
, group_sec
, gc_mark_hook
))
11782 /* Look through the section relocs. */
11784 eh_frame
= elf_eh_frame_section (sec
->owner
);
11785 if ((sec
->flags
& SEC_RELOC
) != 0
11786 && sec
->reloc_count
> 0
11787 && sec
!= eh_frame
)
11789 struct elf_reloc_cookie cookie
;
11791 if (!init_reloc_cookie_for_section (&cookie
, info
, sec
))
11795 for (; cookie
.rel
< cookie
.relend
; cookie
.rel
++)
11796 if (!_bfd_elf_gc_mark_reloc (info
, sec
, gc_mark_hook
, &cookie
))
11801 fini_reloc_cookie_for_section (&cookie
, sec
);
11805 if (ret
&& eh_frame
&& elf_fde_list (sec
))
11807 struct elf_reloc_cookie cookie
;
11809 if (!init_reloc_cookie_for_section (&cookie
, info
, eh_frame
))
11813 if (!_bfd_elf_gc_mark_fdes (info
, sec
, eh_frame
,
11814 gc_mark_hook
, &cookie
))
11816 fini_reloc_cookie_for_section (&cookie
, eh_frame
);
11823 /* Keep debug and special sections. */
11826 _bfd_elf_gc_mark_extra_sections (struct bfd_link_info
*info
,
11827 elf_gc_mark_hook_fn mark_hook ATTRIBUTE_UNUSED
)
11831 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
11834 bfd_boolean some_kept
;
11836 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
11839 /* Ensure all linker created sections are kept, and see whether
11840 any other section is already marked. */
11842 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11844 if ((isec
->flags
& SEC_LINKER_CREATED
) != 0)
11846 else if (isec
->gc_mark
)
11850 /* If no section in this file will be kept, then we can
11851 toss out debug sections. */
11855 /* Keep debug and special sections like .comment when they are
11856 not part of a group, or when we have single-member groups. */
11857 for (isec
= ibfd
->sections
; isec
!= NULL
; isec
= isec
->next
)
11858 if ((elf_next_in_group (isec
) == NULL
11859 || elf_next_in_group (isec
) == isec
)
11860 && ((isec
->flags
& SEC_DEBUGGING
) != 0
11861 || (isec
->flags
& (SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
)) == 0))
11867 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
11869 struct elf_gc_sweep_symbol_info
11871 struct bfd_link_info
*info
;
11872 void (*hide_symbol
) (struct bfd_link_info
*, struct elf_link_hash_entry
*,
11877 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *data
)
11880 && (((h
->root
.type
== bfd_link_hash_defined
11881 || h
->root
.type
== bfd_link_hash_defweak
)
11882 && !(h
->def_regular
11883 && h
->root
.u
.def
.section
->gc_mark
))
11884 || h
->root
.type
== bfd_link_hash_undefined
11885 || h
->root
.type
== bfd_link_hash_undefweak
))
11887 struct elf_gc_sweep_symbol_info
*inf
;
11889 inf
= (struct elf_gc_sweep_symbol_info
*) data
;
11890 (*inf
->hide_symbol
) (inf
->info
, h
, TRUE
);
11891 h
->def_regular
= 0;
11892 h
->ref_regular
= 0;
11893 h
->ref_regular_nonweak
= 0;
11899 /* The sweep phase of garbage collection. Remove all garbage sections. */
11901 typedef bfd_boolean (*gc_sweep_hook_fn
)
11902 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
11905 elf_gc_sweep (bfd
*abfd
, struct bfd_link_info
*info
)
11908 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
11909 gc_sweep_hook_fn gc_sweep_hook
= bed
->gc_sweep_hook
;
11910 unsigned long section_sym_count
;
11911 struct elf_gc_sweep_symbol_info sweep_info
;
11913 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
11917 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
11920 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
11922 /* When any section in a section group is kept, we keep all
11923 sections in the section group. If the first member of
11924 the section group is excluded, we will also exclude the
11926 if (o
->flags
& SEC_GROUP
)
11928 asection
*first
= elf_next_in_group (o
);
11929 o
->gc_mark
= first
->gc_mark
;
11935 /* Skip sweeping sections already excluded. */
11936 if (o
->flags
& SEC_EXCLUDE
)
11939 /* Since this is early in the link process, it is simple
11940 to remove a section from the output. */
11941 o
->flags
|= SEC_EXCLUDE
;
11943 if (info
->print_gc_sections
&& o
->size
!= 0)
11944 _bfd_error_handler (_("Removing unused section '%s' in file '%B'"), sub
, o
->name
);
11946 /* But we also have to update some of the relocation
11947 info we collected before. */
11949 && (o
->flags
& SEC_RELOC
) != 0
11950 && o
->reloc_count
> 0
11951 && !bfd_is_abs_section (o
->output_section
))
11953 Elf_Internal_Rela
*internal_relocs
;
11957 = _bfd_elf_link_read_relocs (o
->owner
, o
, NULL
, NULL
,
11958 info
->keep_memory
);
11959 if (internal_relocs
== NULL
)
11962 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
11964 if (elf_section_data (o
)->relocs
!= internal_relocs
)
11965 free (internal_relocs
);
11973 /* Remove the symbols that were in the swept sections from the dynamic
11974 symbol table. GCFIXME: Anyone know how to get them out of the
11975 static symbol table as well? */
11976 sweep_info
.info
= info
;
11977 sweep_info
.hide_symbol
= bed
->elf_backend_hide_symbol
;
11978 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
,
11981 _bfd_elf_link_renumber_dynsyms (abfd
, info
, §ion_sym_count
);
11985 /* Propagate collected vtable information. This is called through
11986 elf_link_hash_traverse. */
11989 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
11991 /* Those that are not vtables. */
11992 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
11995 /* Those vtables that do not have parents, we cannot merge. */
11996 if (h
->vtable
->parent
== (struct elf_link_hash_entry
*) -1)
11999 /* If we've already been done, exit. */
12000 if (h
->vtable
->used
&& h
->vtable
->used
[-1])
12003 /* Make sure the parent's table is up to date. */
12004 elf_gc_propagate_vtable_entries_used (h
->vtable
->parent
, okp
);
12006 if (h
->vtable
->used
== NULL
)
12008 /* None of this table's entries were referenced. Re-use the
12010 h
->vtable
->used
= h
->vtable
->parent
->vtable
->used
;
12011 h
->vtable
->size
= h
->vtable
->parent
->vtable
->size
;
12016 bfd_boolean
*cu
, *pu
;
12018 /* Or the parent's entries into ours. */
12019 cu
= h
->vtable
->used
;
12021 pu
= h
->vtable
->parent
->vtable
->used
;
12024 const struct elf_backend_data
*bed
;
12025 unsigned int log_file_align
;
12027 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
12028 log_file_align
= bed
->s
->log_file_align
;
12029 n
= h
->vtable
->parent
->vtable
->size
>> log_file_align
;
12044 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
12047 bfd_vma hstart
, hend
;
12048 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
12049 const struct elf_backend_data
*bed
;
12050 unsigned int log_file_align
;
12052 /* Take care of both those symbols that do not describe vtables as
12053 well as those that are not loaded. */
12054 if (h
->vtable
== NULL
|| h
->vtable
->parent
== NULL
)
12057 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
12058 || h
->root
.type
== bfd_link_hash_defweak
);
12060 sec
= h
->root
.u
.def
.section
;
12061 hstart
= h
->root
.u
.def
.value
;
12062 hend
= hstart
+ h
->size
;
12064 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
12066 return *(bfd_boolean
*) okp
= FALSE
;
12067 bed
= get_elf_backend_data (sec
->owner
);
12068 log_file_align
= bed
->s
->log_file_align
;
12070 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
12072 for (rel
= relstart
; rel
< relend
; ++rel
)
12073 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
12075 /* If the entry is in use, do nothing. */
12076 if (h
->vtable
->used
12077 && (rel
->r_offset
- hstart
) < h
->vtable
->size
)
12079 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
12080 if (h
->vtable
->used
[entry
])
12083 /* Otherwise, kill it. */
12084 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
12090 /* Mark sections containing dynamically referenced symbols. When
12091 building shared libraries, we must assume that any visible symbol is
12095 bfd_elf_gc_mark_dynamic_ref_symbol (struct elf_link_hash_entry
*h
, void *inf
)
12097 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
12099 if ((h
->root
.type
== bfd_link_hash_defined
12100 || h
->root
.type
== bfd_link_hash_defweak
)
12102 || ((!info
->executable
|| info
->export_dynamic
)
12104 && ELF_ST_VISIBILITY (h
->other
) != STV_INTERNAL
12105 && ELF_ST_VISIBILITY (h
->other
) != STV_HIDDEN
12106 && (strchr (h
->root
.root
.string
, ELF_VER_CHR
) != NULL
12107 || !bfd_hide_sym_by_version (info
->version_info
,
12108 h
->root
.root
.string
)))))
12109 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12114 /* Keep all sections containing symbols undefined on the command-line,
12115 and the section containing the entry symbol. */
12118 _bfd_elf_gc_keep (struct bfd_link_info
*info
)
12120 struct bfd_sym_chain
*sym
;
12122 for (sym
= info
->gc_sym_list
; sym
!= NULL
; sym
= sym
->next
)
12124 struct elf_link_hash_entry
*h
;
12126 h
= elf_link_hash_lookup (elf_hash_table (info
), sym
->name
,
12127 FALSE
, FALSE
, FALSE
);
12130 && (h
->root
.type
== bfd_link_hash_defined
12131 || h
->root
.type
== bfd_link_hash_defweak
)
12132 && !bfd_is_abs_section (h
->root
.u
.def
.section
))
12133 h
->root
.u
.def
.section
->flags
|= SEC_KEEP
;
12137 /* Do mark and sweep of unused sections. */
12140 bfd_elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
12142 bfd_boolean ok
= TRUE
;
12144 elf_gc_mark_hook_fn gc_mark_hook
;
12145 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12147 if (!bed
->can_gc_sections
12148 || !is_elf_hash_table (info
->hash
))
12150 (*_bfd_error_handler
)(_("Warning: gc-sections option ignored"));
12154 bed
->gc_keep (info
);
12156 /* Try to parse each bfd's .eh_frame section. Point elf_eh_frame_section
12157 at the .eh_frame section if we can mark the FDEs individually. */
12158 _bfd_elf_begin_eh_frame_parsing (info
);
12159 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12162 struct elf_reloc_cookie cookie
;
12164 sec
= bfd_get_section_by_name (sub
, ".eh_frame");
12165 while (sec
&& init_reloc_cookie_for_section (&cookie
, info
, sec
))
12167 _bfd_elf_parse_eh_frame (sub
, info
, sec
, &cookie
);
12168 if (elf_section_data (sec
)->sec_info
12169 && (sec
->flags
& SEC_LINKER_CREATED
) == 0)
12170 elf_eh_frame_section (sub
) = sec
;
12171 fini_reloc_cookie_for_section (&cookie
, sec
);
12172 sec
= bfd_get_next_section_by_name (sec
);
12175 _bfd_elf_end_eh_frame_parsing (info
);
12177 /* Apply transitive closure to the vtable entry usage info. */
12178 elf_link_hash_traverse (elf_hash_table (info
),
12179 elf_gc_propagate_vtable_entries_used
,
12184 /* Kill the vtable relocations that were not used. */
12185 elf_link_hash_traverse (elf_hash_table (info
),
12186 elf_gc_smash_unused_vtentry_relocs
,
12191 /* Mark dynamically referenced symbols. */
12192 if (elf_hash_table (info
)->dynamic_sections_created
)
12193 elf_link_hash_traverse (elf_hash_table (info
),
12194 bed
->gc_mark_dynamic_ref
,
12197 /* Grovel through relocs to find out who stays ... */
12198 gc_mark_hook
= bed
->gc_mark_hook
;
12199 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
12203 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
12206 /* Start at sections marked with SEC_KEEP (ref _bfd_elf_gc_keep).
12207 Also treat note sections as a root, if the section is not part
12209 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
12211 && (o
->flags
& SEC_EXCLUDE
) == 0
12212 && ((o
->flags
& SEC_KEEP
) != 0
12213 || (elf_section_data (o
)->this_hdr
.sh_type
== SHT_NOTE
12214 && elf_next_in_group (o
) == NULL
)))
12216 if (!_bfd_elf_gc_mark (info
, o
, gc_mark_hook
))
12221 /* Allow the backend to mark additional target specific sections. */
12222 bed
->gc_mark_extra_sections (info
, gc_mark_hook
);
12224 /* ... and mark SEC_EXCLUDE for those that go. */
12225 return elf_gc_sweep (abfd
, info
);
12228 /* Called from check_relocs to record the existence of a VTINHERIT reloc. */
12231 bfd_elf_gc_record_vtinherit (bfd
*abfd
,
12233 struct elf_link_hash_entry
*h
,
12236 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
12237 struct elf_link_hash_entry
**search
, *child
;
12238 bfd_size_type extsymcount
;
12239 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12241 /* The sh_info field of the symtab header tells us where the
12242 external symbols start. We don't care about the local symbols at
12244 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/ bed
->s
->sizeof_sym
;
12245 if (!elf_bad_symtab (abfd
))
12246 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
12248 sym_hashes
= elf_sym_hashes (abfd
);
12249 sym_hashes_end
= sym_hashes
+ extsymcount
;
12251 /* Hunt down the child symbol, which is in this section at the same
12252 offset as the relocation. */
12253 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
12255 if ((child
= *search
) != NULL
12256 && (child
->root
.type
== bfd_link_hash_defined
12257 || child
->root
.type
== bfd_link_hash_defweak
)
12258 && child
->root
.u
.def
.section
== sec
12259 && child
->root
.u
.def
.value
== offset
)
12263 (*_bfd_error_handler
) ("%B: %A+%lu: No symbol found for INHERIT",
12264 abfd
, sec
, (unsigned long) offset
);
12265 bfd_set_error (bfd_error_invalid_operation
);
12269 if (!child
->vtable
)
12271 child
->vtable
= (struct elf_link_virtual_table_entry
*)
12272 bfd_zalloc (abfd
, sizeof (*child
->vtable
));
12273 if (!child
->vtable
)
12278 /* This *should* only be the absolute section. It could potentially
12279 be that someone has defined a non-global vtable though, which
12280 would be bad. It isn't worth paging in the local symbols to be
12281 sure though; that case should simply be handled by the assembler. */
12283 child
->vtable
->parent
= (struct elf_link_hash_entry
*) -1;
12286 child
->vtable
->parent
= h
;
12291 /* Called from check_relocs to record the existence of a VTENTRY reloc. */
12294 bfd_elf_gc_record_vtentry (bfd
*abfd ATTRIBUTE_UNUSED
,
12295 asection
*sec ATTRIBUTE_UNUSED
,
12296 struct elf_link_hash_entry
*h
,
12299 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12300 unsigned int log_file_align
= bed
->s
->log_file_align
;
12304 h
->vtable
= (struct elf_link_virtual_table_entry
*)
12305 bfd_zalloc (abfd
, sizeof (*h
->vtable
));
12310 if (addend
>= h
->vtable
->size
)
12312 size_t size
, bytes
, file_align
;
12313 bfd_boolean
*ptr
= h
->vtable
->used
;
12315 /* While the symbol is undefined, we have to be prepared to handle
12317 file_align
= 1 << log_file_align
;
12318 if (h
->root
.type
== bfd_link_hash_undefined
)
12319 size
= addend
+ file_align
;
12323 if (addend
>= size
)
12325 /* Oops! We've got a reference past the defined end of
12326 the table. This is probably a bug -- shall we warn? */
12327 size
= addend
+ file_align
;
12330 size
= (size
+ file_align
- 1) & -file_align
;
12332 /* Allocate one extra entry for use as a "done" flag for the
12333 consolidation pass. */
12334 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
12338 ptr
= (bfd_boolean
*) bfd_realloc (ptr
- 1, bytes
);
12344 oldbytes
= (((h
->vtable
->size
>> log_file_align
) + 1)
12345 * sizeof (bfd_boolean
));
12346 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
12350 ptr
= (bfd_boolean
*) bfd_zmalloc (bytes
);
12355 /* And arrange for that done flag to be at index -1. */
12356 h
->vtable
->used
= ptr
+ 1;
12357 h
->vtable
->size
= size
;
12360 h
->vtable
->used
[addend
>> log_file_align
] = TRUE
;
12365 /* Map an ELF section header flag to its corresponding string. */
12369 flagword flag_value
;
12370 } elf_flags_to_name_table
;
12372 static elf_flags_to_name_table elf_flags_to_names
[] =
12374 { "SHF_WRITE", SHF_WRITE
},
12375 { "SHF_ALLOC", SHF_ALLOC
},
12376 { "SHF_EXECINSTR", SHF_EXECINSTR
},
12377 { "SHF_MERGE", SHF_MERGE
},
12378 { "SHF_STRINGS", SHF_STRINGS
},
12379 { "SHF_INFO_LINK", SHF_INFO_LINK
},
12380 { "SHF_LINK_ORDER", SHF_LINK_ORDER
},
12381 { "SHF_OS_NONCONFORMING", SHF_OS_NONCONFORMING
},
12382 { "SHF_GROUP", SHF_GROUP
},
12383 { "SHF_TLS", SHF_TLS
},
12384 { "SHF_MASKOS", SHF_MASKOS
},
12385 { "SHF_EXCLUDE", SHF_EXCLUDE
},
12388 /* Returns TRUE if the section is to be included, otherwise FALSE. */
12390 bfd_elf_lookup_section_flags (struct bfd_link_info
*info
,
12391 struct flag_info
*flaginfo
,
12394 const bfd_vma sh_flags
= elf_section_flags (section
);
12396 if (!flaginfo
->flags_initialized
)
12398 bfd
*obfd
= info
->output_bfd
;
12399 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12400 struct flag_info_list
*tf
= flaginfo
->flag_list
;
12402 int without_hex
= 0;
12404 for (tf
= flaginfo
->flag_list
; tf
!= NULL
; tf
= tf
->next
)
12407 flagword (*lookup
) (char *);
12409 lookup
= bed
->elf_backend_lookup_section_flags_hook
;
12410 if (lookup
!= NULL
)
12412 flagword hexval
= (*lookup
) ((char *) tf
->name
);
12416 if (tf
->with
== with_flags
)
12417 with_hex
|= hexval
;
12418 else if (tf
->with
== without_flags
)
12419 without_hex
|= hexval
;
12424 for (i
= 0; i
< ARRAY_SIZE (elf_flags_to_names
); ++i
)
12426 if (strcmp (tf
->name
, elf_flags_to_names
[i
].flag_name
) == 0)
12428 if (tf
->with
== with_flags
)
12429 with_hex
|= elf_flags_to_names
[i
].flag_value
;
12430 else if (tf
->with
== without_flags
)
12431 without_hex
|= elf_flags_to_names
[i
].flag_value
;
12438 info
->callbacks
->einfo
12439 (_("Unrecognized INPUT_SECTION_FLAG %s\n"), tf
->name
);
12443 flaginfo
->flags_initialized
= TRUE
;
12444 flaginfo
->only_with_flags
|= with_hex
;
12445 flaginfo
->not_with_flags
|= without_hex
;
12448 if ((flaginfo
->only_with_flags
& sh_flags
) != flaginfo
->only_with_flags
)
12451 if ((flaginfo
->not_with_flags
& sh_flags
) != 0)
12457 struct alloc_got_off_arg
{
12459 struct bfd_link_info
*info
;
12462 /* We need a special top-level link routine to convert got reference counts
12463 to real got offsets. */
12466 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *arg
)
12468 struct alloc_got_off_arg
*gofarg
= (struct alloc_got_off_arg
*) arg
;
12469 bfd
*obfd
= gofarg
->info
->output_bfd
;
12470 const struct elf_backend_data
*bed
= get_elf_backend_data (obfd
);
12472 if (h
->got
.refcount
> 0)
12474 h
->got
.offset
= gofarg
->gotoff
;
12475 gofarg
->gotoff
+= bed
->got_elt_size (obfd
, gofarg
->info
, h
, NULL
, 0);
12478 h
->got
.offset
= (bfd_vma
) -1;
12483 /* And an accompanying bit to work out final got entry offsets once
12484 we're done. Should be called from final_link. */
12487 bfd_elf_gc_common_finalize_got_offsets (bfd
*abfd
,
12488 struct bfd_link_info
*info
)
12491 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12493 struct alloc_got_off_arg gofarg
;
12495 BFD_ASSERT (abfd
== info
->output_bfd
);
12497 if (! is_elf_hash_table (info
->hash
))
12500 /* The GOT offset is relative to the .got section, but the GOT header is
12501 put into the .got.plt section, if the backend uses it. */
12502 if (bed
->want_got_plt
)
12505 gotoff
= bed
->got_header_size
;
12507 /* Do the local .got entries first. */
12508 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
12510 bfd_signed_vma
*local_got
;
12511 bfd_size_type j
, locsymcount
;
12512 Elf_Internal_Shdr
*symtab_hdr
;
12514 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
12517 local_got
= elf_local_got_refcounts (i
);
12521 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
12522 if (elf_bad_symtab (i
))
12523 locsymcount
= symtab_hdr
->sh_size
/ bed
->s
->sizeof_sym
;
12525 locsymcount
= symtab_hdr
->sh_info
;
12527 for (j
= 0; j
< locsymcount
; ++j
)
12529 if (local_got
[j
] > 0)
12531 local_got
[j
] = gotoff
;
12532 gotoff
+= bed
->got_elt_size (abfd
, info
, NULL
, i
, j
);
12535 local_got
[j
] = (bfd_vma
) -1;
12539 /* Then the global .got entries. .plt refcounts are handled by
12540 adjust_dynamic_symbol */
12541 gofarg
.gotoff
= gotoff
;
12542 gofarg
.info
= info
;
12543 elf_link_hash_traverse (elf_hash_table (info
),
12544 elf_gc_allocate_got_offsets
,
12549 /* Many folk need no more in the way of final link than this, once
12550 got entry reference counting is enabled. */
12553 bfd_elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
12555 if (!bfd_elf_gc_common_finalize_got_offsets (abfd
, info
))
12558 /* Invoke the regular ELF backend linker to do all the work. */
12559 return bfd_elf_final_link (abfd
, info
);
12563 bfd_elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
12565 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
12567 if (rcookie
->bad_symtab
)
12568 rcookie
->rel
= rcookie
->rels
;
12570 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
12572 unsigned long r_symndx
;
12574 if (! rcookie
->bad_symtab
)
12575 if (rcookie
->rel
->r_offset
> offset
)
12577 if (rcookie
->rel
->r_offset
!= offset
)
12580 r_symndx
= rcookie
->rel
->r_info
>> rcookie
->r_sym_shift
;
12581 if (r_symndx
== STN_UNDEF
)
12584 if (r_symndx
>= rcookie
->locsymcount
12585 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
12587 struct elf_link_hash_entry
*h
;
12589 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
12591 while (h
->root
.type
== bfd_link_hash_indirect
12592 || h
->root
.type
== bfd_link_hash_warning
)
12593 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
12595 if ((h
->root
.type
== bfd_link_hash_defined
12596 || h
->root
.type
== bfd_link_hash_defweak
)
12597 && discarded_section (h
->root
.u
.def
.section
))
12604 /* It's not a relocation against a global symbol,
12605 but it could be a relocation against a local
12606 symbol for a discarded section. */
12608 Elf_Internal_Sym
*isym
;
12610 /* Need to: get the symbol; get the section. */
12611 isym
= &rcookie
->locsyms
[r_symndx
];
12612 isec
= bfd_section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
12613 if (isec
!= NULL
&& discarded_section (isec
))
12621 /* Discard unneeded references to discarded sections.
12622 Returns TRUE if any section's size was changed. */
12623 /* This function assumes that the relocations are in sorted order,
12624 which is true for all known assemblers. */
12627 bfd_elf_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
12629 struct elf_reloc_cookie cookie
;
12630 asection
*stab
, *eh
;
12631 const struct elf_backend_data
*bed
;
12633 bfd_boolean ret
= FALSE
;
12635 if (info
->traditional_format
12636 || !is_elf_hash_table (info
->hash
))
12639 _bfd_elf_begin_eh_frame_parsing (info
);
12640 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link_next
)
12642 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
12645 bed
= get_elf_backend_data (abfd
);
12648 if (!info
->relocatable
)
12650 eh
= bfd_get_section_by_name (abfd
, ".eh_frame");
12653 || bfd_is_abs_section (eh
->output_section
)))
12654 eh
= bfd_get_next_section_by_name (eh
);
12657 stab
= bfd_get_section_by_name (abfd
, ".stab");
12659 && (stab
->size
== 0
12660 || bfd_is_abs_section (stab
->output_section
)
12661 || stab
->sec_info_type
!= SEC_INFO_TYPE_STABS
))
12666 && bed
->elf_backend_discard_info
== NULL
)
12669 if (!init_reloc_cookie (&cookie
, info
, abfd
))
12673 && stab
->reloc_count
> 0
12674 && init_reloc_cookie_rels (&cookie
, info
, abfd
, stab
))
12676 if (_bfd_discard_section_stabs (abfd
, stab
,
12677 elf_section_data (stab
)->sec_info
,
12678 bfd_elf_reloc_symbol_deleted_p
,
12681 fini_reloc_cookie_rels (&cookie
, stab
);
12685 && init_reloc_cookie_rels (&cookie
, info
, abfd
, eh
))
12687 _bfd_elf_parse_eh_frame (abfd
, info
, eh
, &cookie
);
12688 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, eh
,
12689 bfd_elf_reloc_symbol_deleted_p
,
12692 fini_reloc_cookie_rels (&cookie
, eh
);
12693 eh
= bfd_get_next_section_by_name (eh
);
12696 if (bed
->elf_backend_discard_info
!= NULL
12697 && (*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
12700 fini_reloc_cookie (&cookie
, abfd
);
12702 _bfd_elf_end_eh_frame_parsing (info
);
12704 if (info
->eh_frame_hdr
12705 && !info
->relocatable
12706 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
12713 _bfd_elf_section_already_linked (bfd
*abfd
,
12715 struct bfd_link_info
*info
)
12718 const char *name
, *key
;
12719 struct bfd_section_already_linked
*l
;
12720 struct bfd_section_already_linked_hash_entry
*already_linked_list
;
12722 if (sec
->output_section
== bfd_abs_section_ptr
)
12725 flags
= sec
->flags
;
12727 /* Return if it isn't a linkonce section. A comdat group section
12728 also has SEC_LINK_ONCE set. */
12729 if ((flags
& SEC_LINK_ONCE
) == 0)
12732 /* Don't put group member sections on our list of already linked
12733 sections. They are handled as a group via their group section. */
12734 if (elf_sec_group (sec
) != NULL
)
12737 /* For a SHT_GROUP section, use the group signature as the key. */
12739 if ((flags
& SEC_GROUP
) != 0
12740 && elf_next_in_group (sec
) != NULL
12741 && elf_group_name (elf_next_in_group (sec
)) != NULL
)
12742 key
= elf_group_name (elf_next_in_group (sec
));
12745 /* Otherwise we should have a .gnu.linkonce.<type>.<key> section. */
12746 if (CONST_STRNEQ (name
, ".gnu.linkonce.")
12747 && (key
= strchr (name
+ sizeof (".gnu.linkonce.") - 1, '.')) != NULL
)
12750 /* Must be a user linkonce section that doesn't follow gcc's
12751 naming convention. In this case we won't be matching
12752 single member groups. */
12756 already_linked_list
= bfd_section_already_linked_table_lookup (key
);
12758 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12760 /* We may have 2 different types of sections on the list: group
12761 sections with a signature of <key> (<key> is some string),
12762 and linkonce sections named .gnu.linkonce.<type>.<key>.
12763 Match like sections. LTO plugin sections are an exception.
12764 They are always named .gnu.linkonce.t.<key> and match either
12765 type of section. */
12766 if (((flags
& SEC_GROUP
) == (l
->sec
->flags
& SEC_GROUP
)
12767 && ((flags
& SEC_GROUP
) != 0
12768 || strcmp (name
, l
->sec
->name
) == 0))
12769 || (l
->sec
->owner
->flags
& BFD_PLUGIN
) != 0)
12771 /* The section has already been linked. See if we should
12772 issue a warning. */
12773 if (!_bfd_handle_already_linked (sec
, l
, info
))
12776 if (flags
& SEC_GROUP
)
12778 asection
*first
= elf_next_in_group (sec
);
12779 asection
*s
= first
;
12783 s
->output_section
= bfd_abs_section_ptr
;
12784 /* Record which group discards it. */
12785 s
->kept_section
= l
->sec
;
12786 s
= elf_next_in_group (s
);
12787 /* These lists are circular. */
12797 /* A single member comdat group section may be discarded by a
12798 linkonce section and vice versa. */
12799 if ((flags
& SEC_GROUP
) != 0)
12801 asection
*first
= elf_next_in_group (sec
);
12803 if (first
!= NULL
&& elf_next_in_group (first
) == first
)
12804 /* Check this single member group against linkonce sections. */
12805 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12806 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12807 && bfd_elf_match_symbols_in_sections (l
->sec
, first
, info
))
12809 first
->output_section
= bfd_abs_section_ptr
;
12810 first
->kept_section
= l
->sec
;
12811 sec
->output_section
= bfd_abs_section_ptr
;
12816 /* Check this linkonce section against single member groups. */
12817 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12818 if (l
->sec
->flags
& SEC_GROUP
)
12820 asection
*first
= elf_next_in_group (l
->sec
);
12823 && elf_next_in_group (first
) == first
12824 && bfd_elf_match_symbols_in_sections (first
, sec
, info
))
12826 sec
->output_section
= bfd_abs_section_ptr
;
12827 sec
->kept_section
= first
;
12832 /* Do not complain on unresolved relocations in `.gnu.linkonce.r.F'
12833 referencing its discarded `.gnu.linkonce.t.F' counterpart - g++-3.4
12834 specific as g++-4.x is using COMDAT groups (without the `.gnu.linkonce'
12835 prefix) instead. `.gnu.linkonce.r.*' were the `.rodata' part of its
12836 matching `.gnu.linkonce.t.*'. If `.gnu.linkonce.r.F' is not discarded
12837 but its `.gnu.linkonce.t.F' is discarded means we chose one-only
12838 `.gnu.linkonce.t.F' section from a different bfd not requiring any
12839 `.gnu.linkonce.r.F'. Thus `.gnu.linkonce.r.F' should be discarded.
12840 The reverse order cannot happen as there is never a bfd with only the
12841 `.gnu.linkonce.r.F' section. The order of sections in a bfd does not
12842 matter as here were are looking only for cross-bfd sections. */
12844 if ((flags
& SEC_GROUP
) == 0 && CONST_STRNEQ (name
, ".gnu.linkonce.r."))
12845 for (l
= already_linked_list
->entry
; l
!= NULL
; l
= l
->next
)
12846 if ((l
->sec
->flags
& SEC_GROUP
) == 0
12847 && CONST_STRNEQ (l
->sec
->name
, ".gnu.linkonce.t."))
12849 if (abfd
!= l
->sec
->owner
)
12850 sec
->output_section
= bfd_abs_section_ptr
;
12854 /* This is the first section with this name. Record it. */
12855 if (!bfd_section_already_linked_table_insert (already_linked_list
, sec
))
12856 info
->callbacks
->einfo (_("%F%P: already_linked_table: %E\n"));
12857 return sec
->output_section
== bfd_abs_section_ptr
;
12861 _bfd_elf_common_definition (Elf_Internal_Sym
*sym
)
12863 return sym
->st_shndx
== SHN_COMMON
;
12867 _bfd_elf_common_section_index (asection
*sec ATTRIBUTE_UNUSED
)
12873 _bfd_elf_common_section (asection
*sec ATTRIBUTE_UNUSED
)
12875 return bfd_com_section_ptr
;
12879 _bfd_elf_default_got_elt_size (bfd
*abfd
,
12880 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
12881 struct elf_link_hash_entry
*h ATTRIBUTE_UNUSED
,
12882 bfd
*ibfd ATTRIBUTE_UNUSED
,
12883 unsigned long symndx ATTRIBUTE_UNUSED
)
12885 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
12886 return bed
->s
->arch_size
/ 8;
12889 /* Routines to support the creation of dynamic relocs. */
12891 /* Returns the name of the dynamic reloc section associated with SEC. */
12893 static const char *
12894 get_dynamic_reloc_section_name (bfd
* abfd
,
12896 bfd_boolean is_rela
)
12899 const char *old_name
= bfd_get_section_name (NULL
, sec
);
12900 const char *prefix
= is_rela
? ".rela" : ".rel";
12902 if (old_name
== NULL
)
12905 name
= bfd_alloc (abfd
, strlen (prefix
) + strlen (old_name
) + 1);
12906 sprintf (name
, "%s%s", prefix
, old_name
);
12911 /* Returns the dynamic reloc section associated with SEC.
12912 If necessary compute the name of the dynamic reloc section based
12913 on SEC's name (looked up in ABFD's string table) and the setting
12917 _bfd_elf_get_dynamic_reloc_section (bfd
* abfd
,
12919 bfd_boolean is_rela
)
12921 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12923 if (reloc_sec
== NULL
)
12925 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12929 reloc_sec
= bfd_get_linker_section (abfd
, name
);
12931 if (reloc_sec
!= NULL
)
12932 elf_section_data (sec
)->sreloc
= reloc_sec
;
12939 /* Returns the dynamic reloc section associated with SEC. If the
12940 section does not exist it is created and attached to the DYNOBJ
12941 bfd and stored in the SRELOC field of SEC's elf_section_data
12944 ALIGNMENT is the alignment for the newly created section and
12945 IS_RELA defines whether the name should be .rela.<SEC's name>
12946 or .rel.<SEC's name>. The section name is looked up in the
12947 string table associated with ABFD. */
12950 _bfd_elf_make_dynamic_reloc_section (asection
* sec
,
12952 unsigned int alignment
,
12954 bfd_boolean is_rela
)
12956 asection
* reloc_sec
= elf_section_data (sec
)->sreloc
;
12958 if (reloc_sec
== NULL
)
12960 const char * name
= get_dynamic_reloc_section_name (abfd
, sec
, is_rela
);
12965 reloc_sec
= bfd_get_linker_section (dynobj
, name
);
12967 if (reloc_sec
== NULL
)
12969 flagword flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
12970 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
12971 if ((sec
->flags
& SEC_ALLOC
) != 0)
12972 flags
|= SEC_ALLOC
| SEC_LOAD
;
12974 reloc_sec
= bfd_make_section_anyway_with_flags (dynobj
, name
, flags
);
12975 if (reloc_sec
!= NULL
)
12977 if (! bfd_set_section_alignment (dynobj
, reloc_sec
, alignment
))
12982 elf_section_data (sec
)->sreloc
= reloc_sec
;
12988 /* Copy the ELF symbol type associated with a linker hash entry. */
12990 _bfd_elf_copy_link_hash_symbol_type (bfd
*abfd ATTRIBUTE_UNUSED
,
12991 struct bfd_link_hash_entry
* hdest
,
12992 struct bfd_link_hash_entry
* hsrc
)
12994 struct elf_link_hash_entry
*ehdest
= (struct elf_link_hash_entry
*)hdest
;
12995 struct elf_link_hash_entry
*ehsrc
= (struct elf_link_hash_entry
*)hsrc
;
12997 ehdest
->type
= ehsrc
->type
;
12998 ehdest
->target_internal
= ehsrc
->target_internal
;
13001 /* Append a RELA relocation REL to section S in BFD. */
13004 elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13006 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13007 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
13008 BFD_ASSERT (loc
+ bed
->s
->sizeof_rela
<= s
->contents
+ s
->size
);
13009 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
13012 /* Append a REL relocation REL to section S in BFD. */
13015 elf_append_rel (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
13017 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
13018 bfd_byte
*loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rel
);
13019 BFD_ASSERT (loc
+ bed
->s
->sizeof_rel
<= s
->contents
+ s
->size
);
13020 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);