2 Copyright 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /* ELF linker code. */
22 /* This struct is used to pass information to routines called via
23 elf_link_hash_traverse which must return failure. */
25 struct elf_info_failed
28 struct bfd_link_info
*info
;
31 static boolean elf_link_add_object_symbols
32 PARAMS ((bfd
*, struct bfd_link_info
*));
33 static boolean elf_link_add_archive_symbols
34 PARAMS ((bfd
*, struct bfd_link_info
*));
35 static boolean elf_merge_symbol
36 PARAMS ((bfd
*, struct bfd_link_info
*, const char *, Elf_Internal_Sym
*,
37 asection
**, bfd_vma
*, struct elf_link_hash_entry
**,
38 boolean
*, boolean
*, boolean
*));
39 static boolean elf_export_symbol
40 PARAMS ((struct elf_link_hash_entry
*, PTR
));
41 static boolean elf_fix_symbol_flags
42 PARAMS ((struct elf_link_hash_entry
*, struct elf_info_failed
*));
43 static boolean elf_adjust_dynamic_symbol
44 PARAMS ((struct elf_link_hash_entry
*, PTR
));
45 static boolean elf_link_find_version_dependencies
46 PARAMS ((struct elf_link_hash_entry
*, PTR
));
47 static boolean elf_link_find_version_dependencies
48 PARAMS ((struct elf_link_hash_entry
*, PTR
));
49 static boolean elf_link_assign_sym_version
50 PARAMS ((struct elf_link_hash_entry
*, PTR
));
51 static boolean elf_link_renumber_dynsyms
52 PARAMS ((struct elf_link_hash_entry
*, PTR
));
53 static boolean elf_collect_hash_codes
54 PARAMS ((struct elf_link_hash_entry
*, PTR
));
56 /* Given an ELF BFD, add symbols to the global hash table as
60 elf_bfd_link_add_symbols (abfd
, info
)
62 struct bfd_link_info
*info
;
64 switch (bfd_get_format (abfd
))
67 return elf_link_add_object_symbols (abfd
, info
);
69 return elf_link_add_archive_symbols (abfd
, info
);
71 bfd_set_error (bfd_error_wrong_format
);
77 /* Add symbols from an ELF archive file to the linker hash table. We
78 don't use _bfd_generic_link_add_archive_symbols because of a
79 problem which arises on UnixWare. The UnixWare libc.so is an
80 archive which includes an entry libc.so.1 which defines a bunch of
81 symbols. The libc.so archive also includes a number of other
82 object files, which also define symbols, some of which are the same
83 as those defined in libc.so.1. Correct linking requires that we
84 consider each object file in turn, and include it if it defines any
85 symbols we need. _bfd_generic_link_add_archive_symbols does not do
86 this; it looks through the list of undefined symbols, and includes
87 any object file which defines them. When this algorithm is used on
88 UnixWare, it winds up pulling in libc.so.1 early and defining a
89 bunch of symbols. This means that some of the other objects in the
90 archive are not included in the link, which is incorrect since they
91 precede libc.so.1 in the archive.
93 Fortunately, ELF archive handling is simpler than that done by
94 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
95 oddities. In ELF, if we find a symbol in the archive map, and the
96 symbol is currently undefined, we know that we must pull in that
99 Unfortunately, we do have to make multiple passes over the symbol
100 table until nothing further is resolved. */
103 elf_link_add_archive_symbols (abfd
, info
)
105 struct bfd_link_info
*info
;
108 boolean
*defined
= NULL
;
109 boolean
*included
= NULL
;
113 if (! bfd_has_map (abfd
))
115 /* An empty archive is a special case. */
116 if (bfd_openr_next_archived_file (abfd
, (bfd
*) NULL
) == NULL
)
118 bfd_set_error (bfd_error_no_armap
);
122 /* Keep track of all symbols we know to be already defined, and all
123 files we know to be already included. This is to speed up the
124 second and subsequent passes. */
125 c
= bfd_ardata (abfd
)->symdef_count
;
128 defined
= (boolean
*) bfd_malloc (c
* sizeof (boolean
));
129 included
= (boolean
*) bfd_malloc (c
* sizeof (boolean
));
130 if (defined
== (boolean
*) NULL
|| included
== (boolean
*) NULL
)
132 memset (defined
, 0, c
* sizeof (boolean
));
133 memset (included
, 0, c
* sizeof (boolean
));
135 symdefs
= bfd_ardata (abfd
)->symdefs
;
148 symdefend
= symdef
+ c
;
149 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
151 struct elf_link_hash_entry
*h
;
153 struct bfd_link_hash_entry
*undefs_tail
;
156 if (defined
[i
] || included
[i
])
158 if (symdef
->file_offset
== last
)
164 h
= elf_link_hash_lookup (elf_hash_table (info
), symdef
->name
,
165 false, false, false);
171 /* If this is a default version (the name contains @@),
172 look up the symbol again without the version. The
173 effect is that references to the symbol without the
174 version will be matched by the default symbol in the
177 p
= strchr (symdef
->name
, ELF_VER_CHR
);
178 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
181 copy
= bfd_alloc (abfd
, p
- symdef
->name
+ 1);
184 memcpy (copy
, symdef
->name
, p
- symdef
->name
);
185 copy
[p
- symdef
->name
] = '\0';
187 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
188 false, false, false);
190 bfd_release (abfd
, copy
);
196 if (h
->root
.type
!= bfd_link_hash_undefined
)
198 if (h
->root
.type
!= bfd_link_hash_undefweak
)
203 /* We need to include this archive member. */
205 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
206 if (element
== (bfd
*) NULL
)
209 if (! bfd_check_format (element
, bfd_object
))
212 /* Doublecheck that we have not included this object
213 already--it should be impossible, but there may be
214 something wrong with the archive. */
215 if (element
->archive_pass
!= 0)
217 bfd_set_error (bfd_error_bad_value
);
220 element
->archive_pass
= 1;
222 undefs_tail
= info
->hash
->undefs_tail
;
224 if (! (*info
->callbacks
->add_archive_element
) (info
, element
,
227 if (! elf_link_add_object_symbols (element
, info
))
230 /* If there are any new undefined symbols, we need to make
231 another pass through the archive in order to see whether
232 they can be defined. FIXME: This isn't perfect, because
233 common symbols wind up on undefs_tail and because an
234 undefined symbol which is defined later on in this pass
235 does not require another pass. This isn't a bug, but it
236 does make the code less efficient than it could be. */
237 if (undefs_tail
!= info
->hash
->undefs_tail
)
240 /* Look backward to mark all symbols from this object file
241 which we have already seen in this pass. */
245 included
[mark
] = true;
250 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
252 /* We mark subsequent symbols from this object file as we go
253 on through the loop. */
254 last
= symdef
->file_offset
;
265 if (defined
!= (boolean
*) NULL
)
267 if (included
!= (boolean
*) NULL
)
272 /* This function is called when we want to define a new symbol. It
273 handles the various cases which arise when we find a definition in
274 a dynamic object, or when there is already a definition in a
275 dynamic object. The new symbol is described by NAME, SYM, PSEC,
276 and PVALUE. We set SYM_HASH to the hash table entry. We set
277 OVERRIDE if the old symbol is overriding a new definition. We set
278 TYPE_CHANGE_OK if it is OK for the type to change. We set
279 SIZE_CHANGE_OK if it is OK for the size to change. By OK to
280 change, we mean that we shouldn't warn if the type or size does
284 elf_merge_symbol (abfd
, info
, name
, sym
, psec
, pvalue
, sym_hash
,
285 override
, type_change_ok
, size_change_ok
)
287 struct bfd_link_info
*info
;
289 Elf_Internal_Sym
*sym
;
292 struct elf_link_hash_entry
**sym_hash
;
294 boolean
*type_change_ok
;
295 boolean
*size_change_ok
;
298 struct elf_link_hash_entry
*h
;
301 boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
306 bind
= ELF_ST_BIND (sym
->st_info
);
308 if (! bfd_is_und_section (sec
))
309 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, true, false, false);
311 h
= ((struct elf_link_hash_entry
*)
312 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, true, false, false));
317 /* This code is for coping with dynamic objects, and is only useful
318 if we are doing an ELF link. */
319 if (info
->hash
->creator
!= abfd
->xvec
)
322 /* For merging, we only care about real symbols. */
324 while (h
->root
.type
== bfd_link_hash_indirect
325 || h
->root
.type
== bfd_link_hash_warning
)
326 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
328 /* If we just created the symbol, mark it as being an ELF symbol.
329 Other than that, there is nothing to do--there is no merge issue
330 with a newly defined symbol--so we just return. */
332 if (h
->root
.type
== bfd_link_hash_new
)
334 h
->elf_link_hash_flags
&=~ ELF_LINK_NON_ELF
;
338 /* OLDBFD is a BFD associated with the existing symbol. */
340 switch (h
->root
.type
)
346 case bfd_link_hash_undefined
:
347 case bfd_link_hash_undefweak
:
348 oldbfd
= h
->root
.u
.undef
.abfd
;
351 case bfd_link_hash_defined
:
352 case bfd_link_hash_defweak
:
353 oldbfd
= h
->root
.u
.def
.section
->owner
;
356 case bfd_link_hash_common
:
357 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
361 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
362 respectively, is from a dynamic object. */
364 if ((abfd
->flags
& DYNAMIC
) != 0)
369 if (oldbfd
== NULL
|| (oldbfd
->flags
& DYNAMIC
) == 0)
374 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
375 respectively, appear to be a definition rather than reference. */
377 if (bfd_is_und_section (sec
) || bfd_is_com_section (sec
))
382 if (h
->root
.type
== bfd_link_hash_undefined
383 || h
->root
.type
== bfd_link_hash_undefweak
384 || h
->root
.type
== bfd_link_hash_common
)
389 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
390 symbol, respectively, appears to be a common symbol in a dynamic
391 object. If a symbol appears in an uninitialized section, and is
392 not weak, and is not a function, then it may be a common symbol
393 which was resolved when the dynamic object was created. We want
394 to treat such symbols specially, because they raise special
395 considerations when setting the symbol size: if the symbol
396 appears as a common symbol in a regular object, and the size in
397 the regular object is larger, we must make sure that we use the
398 larger size. This problematic case can always be avoided in C,
399 but it must be handled correctly when using Fortran shared
402 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
403 likewise for OLDDYNCOMMON and OLDDEF.
405 Note that this test is just a heuristic, and that it is quite
406 possible to have an uninitialized symbol in a shared object which
407 is really a definition, rather than a common symbol. This could
408 lead to some minor confusion when the symbol really is a common
409 symbol in some regular object. However, I think it will be
414 && (sec
->flags
& SEC_ALLOC
) != 0
415 && (sec
->flags
& SEC_LOAD
) == 0
418 && ELF_ST_TYPE (sym
->st_info
) != STT_FUNC
)
421 newdyncommon
= false;
425 && h
->root
.type
== bfd_link_hash_defined
426 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
427 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
428 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
430 && h
->type
!= STT_FUNC
)
433 olddyncommon
= false;
435 /* It's OK to change the type if either the existing symbol or the
436 new symbol is weak. */
438 if (h
->root
.type
== bfd_link_hash_defweak
439 || h
->root
.type
== bfd_link_hash_undefweak
441 *type_change_ok
= true;
443 /* It's OK to change the size if either the existing symbol or the
444 new symbol is weak, or if the old symbol is undefined. */
447 || h
->root
.type
== bfd_link_hash_undefined
)
448 *size_change_ok
= true;
450 /* If both the old and the new symbols look like common symbols in a
451 dynamic object, set the size of the symbol to the larger of the
456 && sym
->st_size
!= h
->size
)
458 /* Since we think we have two common symbols, issue a multiple
459 common warning if desired. Note that we only warn if the
460 size is different. If the size is the same, we simply let
461 the old symbol override the new one as normally happens with
462 symbols defined in dynamic objects. */
464 if (! ((*info
->callbacks
->multiple_common
)
465 (info
, h
->root
.root
.string
, oldbfd
, bfd_link_hash_common
,
466 h
->size
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
469 if (sym
->st_size
> h
->size
)
470 h
->size
= sym
->st_size
;
472 *size_change_ok
= true;
475 /* If we are looking at a dynamic object, and we have found a
476 definition, we need to see if the symbol was already defined by
477 some other object. If so, we want to use the existing
478 definition, and we do not want to report a multiple symbol
479 definition error; we do this by clobbering *PSEC to be
482 We treat a common symbol as a definition if the symbol in the
483 shared library is a function, since common symbols always
484 represent variables; this can cause confusion in principle, but
485 any such confusion would seem to indicate an erroneous program or
486 shared library. We also permit a common symbol in a regular
487 object to override a weak symbol in a shared object. */
492 || (h
->root
.type
== bfd_link_hash_common
494 || ELF_ST_TYPE (sym
->st_info
) == STT_FUNC
))))
498 newdyncommon
= false;
500 *psec
= sec
= bfd_und_section_ptr
;
501 *size_change_ok
= true;
503 /* If we get here when the old symbol is a common symbol, then
504 we are explicitly letting it override a weak symbol or
505 function in a dynamic object, and we don't want to warn about
506 a type change. If the old symbol is a defined symbol, a type
507 change warning may still be appropriate. */
509 if (h
->root
.type
== bfd_link_hash_common
)
510 *type_change_ok
= true;
513 /* Handle the special case of an old common symbol merging with a
514 new symbol which looks like a common symbol in a shared object.
515 We change *PSEC and *PVALUE to make the new symbol look like a
516 common symbol, and let _bfd_generic_link_add_one_symbol will do
520 && h
->root
.type
== bfd_link_hash_common
)
524 newdyncommon
= false;
525 *pvalue
= sym
->st_size
;
526 *psec
= sec
= bfd_com_section_ptr
;
527 *size_change_ok
= true;
530 /* If the old symbol is from a dynamic object, and the new symbol is
531 a definition which is not from a dynamic object, then the new
532 symbol overrides the old symbol. Symbols from regular files
533 always take precedence over symbols from dynamic objects, even if
534 they are defined after the dynamic object in the link.
536 As above, we again permit a common symbol in a regular object to
537 override a definition in a shared object if the shared object
538 symbol is a function or is weak. */
542 || (bfd_is_com_section (sec
)
543 && (h
->root
.type
== bfd_link_hash_defweak
544 || h
->type
== STT_FUNC
)))
547 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0)
549 /* Change the hash table entry to undefined, and let
550 _bfd_generic_link_add_one_symbol do the right thing with the
553 h
->root
.type
= bfd_link_hash_undefined
;
554 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
555 *size_change_ok
= true;
558 olddyncommon
= false;
560 /* We again permit a type change when a common symbol may be
561 overriding a function. */
563 if (bfd_is_com_section (sec
))
564 *type_change_ok
= true;
566 /* This union may have been set to be non-NULL when this symbol
567 was seen in a dynamic object. We must force the union to be
568 NULL, so that it is correct for a regular symbol. */
570 h
->verinfo
.vertree
= NULL
;
572 /* In this special case, if H is the target of an indirection,
573 we want the caller to frob with H rather than with the
574 indirect symbol. That will permit the caller to redefine the
575 target of the indirection, rather than the indirect symbol
576 itself. FIXME: This will break the -y option if we store a
577 symbol with a different name. */
581 /* Handle the special case of a new common symbol merging with an
582 old symbol that looks like it might be a common symbol defined in
583 a shared object. Note that we have already handled the case in
584 which a new common symbol should simply override the definition
585 in the shared library. */
588 && bfd_is_com_section (sec
)
591 /* It would be best if we could set the hash table entry to a
592 common symbol, but we don't know what to use for the section
594 if (! ((*info
->callbacks
->multiple_common
)
595 (info
, h
->root
.root
.string
, oldbfd
, bfd_link_hash_common
,
596 h
->size
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
599 /* If the predumed common symbol in the dynamic object is
600 larger, pretend that the new symbol has its size. */
602 if (h
->size
> *pvalue
)
605 /* FIXME: We no longer know the alignment required by the symbol
606 in the dynamic object, so we just wind up using the one from
607 the regular object. */
610 olddyncommon
= false;
612 h
->root
.type
= bfd_link_hash_undefined
;
613 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
615 *size_change_ok
= true;
616 *type_change_ok
= true;
618 h
->verinfo
.vertree
= NULL
;
624 /* Add symbols from an ELF object file to the linker hash table. */
627 elf_link_add_object_symbols (abfd
, info
)
629 struct bfd_link_info
*info
;
631 boolean (*add_symbol_hook
) PARAMS ((bfd
*, struct bfd_link_info
*,
632 const Elf_Internal_Sym
*,
633 const char **, flagword
*,
634 asection
**, bfd_vma
*));
635 boolean (*check_relocs
) PARAMS ((bfd
*, struct bfd_link_info
*,
636 asection
*, const Elf_Internal_Rela
*));
638 Elf_Internal_Shdr
*hdr
;
642 Elf_External_Sym
*buf
= NULL
;
643 struct elf_link_hash_entry
**sym_hash
;
645 bfd_byte
*dynver
= NULL
;
646 Elf_External_Versym
*extversym
= NULL
;
647 Elf_External_Versym
*ever
;
648 Elf_External_Dyn
*dynbuf
= NULL
;
649 struct elf_link_hash_entry
*weaks
;
650 Elf_External_Sym
*esym
;
651 Elf_External_Sym
*esymend
;
653 add_symbol_hook
= get_elf_backend_data (abfd
)->elf_add_symbol_hook
;
654 collect
= get_elf_backend_data (abfd
)->collect
;
656 if ((abfd
->flags
& DYNAMIC
) == 0)
662 /* You can't use -r against a dynamic object. Also, there's no
663 hope of using a dynamic object which does not exactly match
664 the format of the output file. */
665 if (info
->relocateable
|| info
->hash
->creator
!= abfd
->xvec
)
667 bfd_set_error (bfd_error_invalid_operation
);
672 /* As a GNU extension, any input sections which are named
673 .gnu.warning.SYMBOL are treated as warning symbols for the given
674 symbol. This differs from .gnu.warning sections, which generate
675 warnings when they are included in an output file. */
680 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
684 name
= bfd_get_section_name (abfd
, s
);
685 if (strncmp (name
, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0)
690 name
+= sizeof ".gnu.warning." - 1;
692 /* If this is a shared object, then look up the symbol
693 in the hash table. If it is there, and it is already
694 been defined, then we will not be using the entry
695 from this shared object, so we don't need to warn.
696 FIXME: If we see the definition in a regular object
697 later on, we will warn, but we shouldn't. The only
698 fix is to keep track of what warnings we are supposed
699 to emit, and then handle them all at the end of the
701 if (dynamic
&& abfd
->xvec
== info
->hash
->creator
)
703 struct elf_link_hash_entry
*h
;
705 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
708 /* FIXME: What about bfd_link_hash_common? */
710 && (h
->root
.type
== bfd_link_hash_defined
711 || h
->root
.type
== bfd_link_hash_defweak
))
713 /* We don't want to issue this warning. Clobber
714 the section size so that the warning does not
715 get copied into the output file. */
721 sz
= bfd_section_size (abfd
, s
);
722 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
726 if (! bfd_get_section_contents (abfd
, s
, msg
, (file_ptr
) 0, sz
))
731 if (! (_bfd_generic_link_add_one_symbol
732 (info
, abfd
, name
, BSF_WARNING
, s
, (bfd_vma
) 0, msg
,
733 false, collect
, (struct bfd_link_hash_entry
**) NULL
)))
736 if (! info
->relocateable
)
738 /* Clobber the section size so that the warning does
739 not get copied into the output file. */
746 /* If this is a dynamic object, we always link against the .dynsym
747 symbol table, not the .symtab symbol table. The dynamic linker
748 will only see the .dynsym symbol table, so there is no reason to
749 look at .symtab for a dynamic object. */
751 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
752 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
754 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
758 /* Read in any version definitions. */
760 if (! _bfd_elf_slurp_version_tables (abfd
))
763 /* Read in the symbol versions, but don't bother to convert them
764 to internal format. */
765 if (elf_dynversym (abfd
) != 0)
767 Elf_Internal_Shdr
*versymhdr
;
769 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
770 extversym
= (Elf_External_Versym
*) bfd_malloc (hdr
->sh_size
);
771 if (extversym
== NULL
)
773 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
774 || (bfd_read ((PTR
) extversym
, 1, versymhdr
->sh_size
, abfd
)
775 != versymhdr
->sh_size
))
780 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
782 /* The sh_info field of the symtab header tells us where the
783 external symbols start. We don't care about the local symbols at
785 if (elf_bad_symtab (abfd
))
787 extsymcount
= symcount
;
792 extsymcount
= symcount
- hdr
->sh_info
;
793 extsymoff
= hdr
->sh_info
;
796 buf
= ((Elf_External_Sym
*)
797 bfd_malloc (extsymcount
* sizeof (Elf_External_Sym
)));
798 if (buf
== NULL
&& extsymcount
!= 0)
801 /* We store a pointer to the hash table entry for each external
803 sym_hash
= ((struct elf_link_hash_entry
**)
805 extsymcount
* sizeof (struct elf_link_hash_entry
*)));
806 if (sym_hash
== NULL
)
808 elf_sym_hashes (abfd
) = sym_hash
;
812 /* If we are creating a shared library, create all the dynamic
813 sections immediately. We need to attach them to something,
814 so we attach them to this BFD, provided it is the right
815 format. FIXME: If there are no input BFD's of the same
816 format as the output, we can't make a shared library. */
818 && ! elf_hash_table (info
)->dynamic_sections_created
819 && abfd
->xvec
== info
->hash
->creator
)
821 if (! elf_link_create_dynamic_sections (abfd
, info
))
830 bfd_size_type oldsize
;
831 bfd_size_type strindex
;
833 /* Find the name to use in a DT_NEEDED entry that refers to this
834 object. If the object has a DT_SONAME entry, we use it.
835 Otherwise, if the generic linker stuck something in
836 elf_dt_name, we use that. Otherwise, we just use the file
837 name. If the generic linker put a null string into
838 elf_dt_name, we don't make a DT_NEEDED entry at all, even if
839 there is a DT_SONAME entry. */
841 name
= bfd_get_filename (abfd
);
842 if (elf_dt_name (abfd
) != NULL
)
844 name
= elf_dt_name (abfd
);
848 s
= bfd_get_section_by_name (abfd
, ".dynamic");
851 Elf_External_Dyn
*extdyn
;
852 Elf_External_Dyn
*extdynend
;
856 dynbuf
= (Elf_External_Dyn
*) bfd_malloc ((size_t) s
->_raw_size
);
860 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
,
861 (file_ptr
) 0, s
->_raw_size
))
864 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
867 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
870 extdynend
= extdyn
+ s
->_raw_size
/ sizeof (Elf_External_Dyn
);
871 for (; extdyn
< extdynend
; extdyn
++)
873 Elf_Internal_Dyn dyn
;
875 elf_swap_dyn_in (abfd
, extdyn
, &dyn
);
876 if (dyn
.d_tag
== DT_SONAME
)
878 name
= bfd_elf_string_from_elf_section (abfd
, link
,
883 if (dyn
.d_tag
== DT_NEEDED
)
885 struct bfd_link_needed_list
*n
, **pn
;
888 n
= ((struct bfd_link_needed_list
*)
889 bfd_alloc (abfd
, sizeof (struct bfd_link_needed_list
)));
890 fnm
= bfd_elf_string_from_elf_section (abfd
, link
,
892 if (n
== NULL
|| fnm
== NULL
)
894 anm
= bfd_alloc (abfd
, strlen (fnm
) + 1);
901 for (pn
= &elf_hash_table (info
)->needed
;
913 /* We do not want to include any of the sections in a dynamic
914 object in the output file. We hack by simply clobbering the
915 list of sections in the BFD. This could be handled more
916 cleanly by, say, a new section flag; the existing
917 SEC_NEVER_LOAD flag is not the one we want, because that one
918 still implies that the section takes up space in the output
920 abfd
->sections
= NULL
;
921 abfd
->section_count
= 0;
923 /* If this is the first dynamic object found in the link, create
924 the special sections required for dynamic linking. */
925 if (! elf_hash_table (info
)->dynamic_sections_created
)
927 if (! elf_link_create_dynamic_sections (abfd
, info
))
933 /* Add a DT_NEEDED entry for this dynamic object. */
934 oldsize
= _bfd_stringtab_size (elf_hash_table (info
)->dynstr
);
935 strindex
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
, name
,
937 if (strindex
== (bfd_size_type
) -1)
940 if (oldsize
== _bfd_stringtab_size (elf_hash_table (info
)->dynstr
))
943 Elf_External_Dyn
*dyncon
, *dynconend
;
945 /* The hash table size did not change, which means that
946 the dynamic object name was already entered. If we
947 have already included this dynamic object in the
948 link, just ignore it. There is no reason to include
949 a particular dynamic object more than once. */
950 sdyn
= bfd_get_section_by_name (elf_hash_table (info
)->dynobj
,
952 BFD_ASSERT (sdyn
!= NULL
);
954 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
955 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
957 for (; dyncon
< dynconend
; dyncon
++)
959 Elf_Internal_Dyn dyn
;
961 elf_swap_dyn_in (elf_hash_table (info
)->dynobj
, dyncon
,
963 if (dyn
.d_tag
== DT_NEEDED
964 && dyn
.d_un
.d_val
== strindex
)
968 if (extversym
!= NULL
)
975 if (! elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
979 /* Save the SONAME, if there is one, because sometimes the
980 linker emulation code will need to know it. */
982 name
= bfd_get_filename (abfd
);
983 elf_dt_name (abfd
) = name
;
987 hdr
->sh_offset
+ extsymoff
* sizeof (Elf_External_Sym
),
989 || (bfd_read ((PTR
) buf
, sizeof (Elf_External_Sym
), extsymcount
, abfd
)
990 != extsymcount
* sizeof (Elf_External_Sym
)))
995 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
996 esymend
= buf
+ extsymcount
;
999 esym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
1001 Elf_Internal_Sym sym
;
1007 struct elf_link_hash_entry
*h
;
1009 boolean size_change_ok
, type_change_ok
;
1010 boolean new_weakdef
;
1011 unsigned int old_alignment
;
1013 elf_swap_symbol_in (abfd
, esym
, &sym
);
1015 flags
= BSF_NO_FLAGS
;
1017 value
= sym
.st_value
;
1020 bind
= ELF_ST_BIND (sym
.st_info
);
1021 if (bind
== STB_LOCAL
)
1023 /* This should be impossible, since ELF requires that all
1024 global symbols follow all local symbols, and that sh_info
1025 point to the first global symbol. Unfortunatealy, Irix 5
1029 else if (bind
== STB_GLOBAL
)
1031 if (sym
.st_shndx
!= SHN_UNDEF
1032 && sym
.st_shndx
!= SHN_COMMON
)
1037 else if (bind
== STB_WEAK
)
1041 /* Leave it up to the processor backend. */
1044 if (sym
.st_shndx
== SHN_UNDEF
)
1045 sec
= bfd_und_section_ptr
;
1046 else if (sym
.st_shndx
> 0 && sym
.st_shndx
< SHN_LORESERVE
)
1048 sec
= section_from_elf_index (abfd
, sym
.st_shndx
);
1050 sec
= bfd_abs_section_ptr
;
1051 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
1054 else if (sym
.st_shndx
== SHN_ABS
)
1055 sec
= bfd_abs_section_ptr
;
1056 else if (sym
.st_shndx
== SHN_COMMON
)
1058 sec
= bfd_com_section_ptr
;
1059 /* What ELF calls the size we call the value. What ELF
1060 calls the value we call the alignment. */
1061 value
= sym
.st_size
;
1065 /* Leave it up to the processor backend. */
1068 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
, sym
.st_name
);
1069 if (name
== (const char *) NULL
)
1072 if (add_symbol_hook
)
1074 if (! (*add_symbol_hook
) (abfd
, info
, &sym
, &name
, &flags
, &sec
,
1078 /* The hook function sets the name to NULL if this symbol
1079 should be skipped for some reason. */
1080 if (name
== (const char *) NULL
)
1084 /* Sanity check that all possibilities were handled. */
1085 if (sec
== (asection
*) NULL
)
1087 bfd_set_error (bfd_error_bad_value
);
1091 if (bfd_is_und_section (sec
)
1092 || bfd_is_com_section (sec
))
1097 size_change_ok
= false;
1098 type_change_ok
= get_elf_backend_data (abfd
)->type_change_ok
;
1100 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1102 Elf_Internal_Versym iver
;
1103 unsigned int vernum
= 0;
1108 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
1109 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
1111 /* If this is a hidden symbol, or if it is not version
1112 1, we append the version name to the symbol name.
1113 However, we do not modify a non-hidden absolute
1114 symbol, because it might be the version symbol
1115 itself. FIXME: What if it isn't? */
1116 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
1117 || (vernum
> 1 && ! bfd_is_abs_section (sec
)))
1120 int namelen
, newlen
;
1123 if (sym
.st_shndx
!= SHN_UNDEF
)
1125 if (vernum
> elf_tdata (abfd
)->dynverdef_hdr
.sh_info
)
1127 (*_bfd_error_handler
)
1128 (_("%s: %s: invalid version %u (max %d)"),
1129 abfd
->filename
, name
, vernum
,
1130 elf_tdata (abfd
)->dynverdef_hdr
.sh_info
);
1131 bfd_set_error (bfd_error_bad_value
);
1134 else if (vernum
> 1)
1136 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1142 /* We cannot simply test for the number of
1143 entries in the VERNEED section since the
1144 numbers for the needed versions do not start
1146 Elf_Internal_Verneed
*t
;
1149 for (t
= elf_tdata (abfd
)->verref
;
1153 Elf_Internal_Vernaux
*a
;
1155 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1157 if (a
->vna_other
== vernum
)
1159 verstr
= a
->vna_nodename
;
1168 (*_bfd_error_handler
)
1169 (_("%s: %s: invalid needed version %d"),
1170 abfd
->filename
, name
, vernum
);
1171 bfd_set_error (bfd_error_bad_value
);
1176 namelen
= strlen (name
);
1177 newlen
= namelen
+ strlen (verstr
) + 2;
1178 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0)
1181 newname
= (char *) bfd_alloc (abfd
, newlen
);
1182 if (newname
== NULL
)
1184 strcpy (newname
, name
);
1185 p
= newname
+ namelen
;
1187 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0)
1195 if (! elf_merge_symbol (abfd
, info
, name
, &sym
, &sec
, &value
,
1196 sym_hash
, &override
, &type_change_ok
,
1204 while (h
->root
.type
== bfd_link_hash_indirect
1205 || h
->root
.type
== bfd_link_hash_warning
)
1206 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1208 /* Remember the old alignment if this is a common symbol, so
1209 that we don't reduce the alignment later on. We can't
1210 check later, because _bfd_generic_link_add_one_symbol
1211 will set a default for the alignment which we want to
1213 if (h
->root
.type
== bfd_link_hash_common
)
1214 old_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1216 if (elf_tdata (abfd
)->verdef
!= NULL
1220 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
1223 if (! (_bfd_generic_link_add_one_symbol
1224 (info
, abfd
, name
, flags
, sec
, value
, (const char *) NULL
,
1225 false, collect
, (struct bfd_link_hash_entry
**) sym_hash
)))
1229 while (h
->root
.type
== bfd_link_hash_indirect
1230 || h
->root
.type
== bfd_link_hash_warning
)
1231 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1234 new_weakdef
= false;
1237 && (flags
& BSF_WEAK
) != 0
1238 && ELF_ST_TYPE (sym
.st_info
) != STT_FUNC
1239 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
1240 && h
->weakdef
== NULL
)
1242 /* Keep a list of all weak defined non function symbols from
1243 a dynamic object, using the weakdef field. Later in this
1244 function we will set the weakdef field to the correct
1245 value. We only put non-function symbols from dynamic
1246 objects on this list, because that happens to be the only
1247 time we need to know the normal symbol corresponding to a
1248 weak symbol, and the information is time consuming to
1249 figure out. If the weakdef field is not already NULL,
1250 then this symbol was already defined by some previous
1251 dynamic object, and we will be using that previous
1252 definition anyhow. */
1259 /* Set the alignment of a common symbol. */
1260 if (sym
.st_shndx
== SHN_COMMON
1261 && h
->root
.type
== bfd_link_hash_common
)
1265 align
= bfd_log2 (sym
.st_value
);
1266 if (align
> old_alignment
)
1267 h
->root
.u
.c
.p
->alignment_power
= align
;
1270 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1276 /* Remember the symbol size and type. */
1277 if (sym
.st_size
!= 0
1278 && (definition
|| h
->size
== 0))
1280 if (h
->size
!= 0 && h
->size
!= sym
.st_size
&& ! size_change_ok
)
1281 (*_bfd_error_handler
)
1282 (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"),
1283 name
, (unsigned long) h
->size
, (unsigned long) sym
.st_size
,
1284 bfd_get_filename (abfd
));
1286 h
->size
= sym
.st_size
;
1289 /* If this is a common symbol, then we always want H->SIZE
1290 to be the size of the common symbol. The code just above
1291 won't fix the size if a common symbol becomes larger. We
1292 don't warn about a size change here, because that is
1293 covered by --warn-common. */
1294 if (h
->root
.type
== bfd_link_hash_common
)
1295 h
->size
= h
->root
.u
.c
.size
;
1297 if (ELF_ST_TYPE (sym
.st_info
) != STT_NOTYPE
1298 && (definition
|| h
->type
== STT_NOTYPE
))
1300 if (h
->type
!= STT_NOTYPE
1301 && h
->type
!= ELF_ST_TYPE (sym
.st_info
)
1302 && ! type_change_ok
)
1303 (*_bfd_error_handler
)
1304 (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
1305 name
, h
->type
, ELF_ST_TYPE (sym
.st_info
),
1306 bfd_get_filename (abfd
));
1308 h
->type
= ELF_ST_TYPE (sym
.st_info
);
1311 if (sym
.st_other
!= 0
1312 && (definition
|| h
->other
== 0))
1313 h
->other
= sym
.st_other
;
1315 /* Set a flag in the hash table entry indicating the type of
1316 reference or definition we just found. Keep a count of
1317 the number of dynamic symbols we find. A dynamic symbol
1318 is one which is referenced or defined by both a regular
1319 object and a shared object. */
1320 old_flags
= h
->elf_link_hash_flags
;
1325 new_flag
= ELF_LINK_HASH_REF_REGULAR
;
1327 new_flag
= ELF_LINK_HASH_DEF_REGULAR
;
1329 || (old_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
1330 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0)
1336 new_flag
= ELF_LINK_HASH_REF_DYNAMIC
;
1338 new_flag
= ELF_LINK_HASH_DEF_DYNAMIC
;
1339 if ((old_flags
& (ELF_LINK_HASH_DEF_REGULAR
1340 | ELF_LINK_HASH_REF_REGULAR
)) != 0
1341 || (h
->weakdef
!= NULL
1343 && h
->weakdef
->dynindx
!= -1))
1347 h
->elf_link_hash_flags
|= new_flag
;
1349 /* If this symbol has a version, and it is the default
1350 version, we create an indirect symbol from the default
1351 name to the fully decorated name. This will cause
1352 external references which do not specify a version to be
1353 bound to this version of the symbol. */
1358 p
= strchr (name
, ELF_VER_CHR
);
1359 if (p
!= NULL
&& p
[1] == ELF_VER_CHR
)
1362 struct elf_link_hash_entry
*hi
;
1365 shortname
= bfd_hash_allocate (&info
->hash
->table
,
1367 if (shortname
== NULL
)
1369 strncpy (shortname
, name
, p
- name
);
1370 shortname
[p
- name
] = '\0';
1372 /* We are going to create a new symbol. Merge it
1373 with any existing symbol with this name. For the
1374 purposes of the merge, act as though we were
1375 defining the symbol we just defined, although we
1376 actually going to define an indirect symbol. */
1377 type_change_ok
= false;
1378 size_change_ok
= false;
1379 if (! elf_merge_symbol (abfd
, info
, shortname
, &sym
, &sec
,
1380 &value
, &hi
, &override
,
1381 &type_change_ok
, &size_change_ok
))
1386 if (! (_bfd_generic_link_add_one_symbol
1387 (info
, abfd
, shortname
, BSF_INDIRECT
,
1388 bfd_ind_section_ptr
, (bfd_vma
) 0, name
, false,
1389 collect
, (struct bfd_link_hash_entry
**) &hi
)))
1394 /* In this case the symbol named SHORTNAME is
1395 overriding the indirect symbol we want to
1396 add. We were planning on making SHORTNAME an
1397 indirect symbol referring to NAME. SHORTNAME
1398 is the name without a version. NAME is the
1399 fully versioned name, and it is the default
1402 Overriding means that we already saw a
1403 definition for the symbol SHORTNAME in a
1404 regular object, and it is overriding the
1405 symbol defined in the dynamic object.
1407 When this happens, we actually want to change
1408 NAME, the symbol we just added, to refer to
1409 SHORTNAME. This will cause references to
1410 NAME in the shared object to become
1411 references to SHORTNAME in the regular
1412 object. This is what we expect when we
1413 override a function in a shared object: that
1414 the references in the shared object will be
1415 mapped to the definition in the regular
1418 while (hi
->root
.type
== bfd_link_hash_indirect
1419 || hi
->root
.type
== bfd_link_hash_warning
)
1420 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1422 h
->root
.type
= bfd_link_hash_indirect
;
1423 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1424 if (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
)
1426 h
->elf_link_hash_flags
&=~ ELF_LINK_HASH_DEF_DYNAMIC
;
1427 hi
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_DYNAMIC
;
1428 if (hi
->elf_link_hash_flags
1429 & (ELF_LINK_HASH_REF_REGULAR
1430 | ELF_LINK_HASH_DEF_REGULAR
))
1432 if (! _bfd_elf_link_record_dynamic_symbol (info
,
1438 /* Now set HI to H, so that the following code
1439 will set the other fields correctly. */
1443 /* If there is a duplicate definition somewhere,
1444 then HI may not point to an indirect symbol. We
1445 will have reported an error to the user in that
1448 if (hi
->root
.type
== bfd_link_hash_indirect
)
1450 struct elf_link_hash_entry
*ht
;
1452 /* If the symbol became indirect, then we assume
1453 that we have not seen a definition before. */
1454 BFD_ASSERT ((hi
->elf_link_hash_flags
1455 & (ELF_LINK_HASH_DEF_DYNAMIC
1456 | ELF_LINK_HASH_DEF_REGULAR
))
1459 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1461 /* Copy down any references that we may have
1462 already seen to the symbol which just became
1464 ht
->elf_link_hash_flags
|=
1465 (hi
->elf_link_hash_flags
1466 & (ELF_LINK_HASH_REF_DYNAMIC
1467 | ELF_LINK_HASH_REF_REGULAR
));
1469 /* Copy over the global and procedure linkage table
1470 offset entries. These may have been already set
1471 up by a check_relocs routine. */
1472 if (ht
->got
.offset
== (bfd_vma
) -1)
1474 ht
->got
.offset
= hi
->got
.offset
;
1475 hi
->got
.offset
= (bfd_vma
) -1;
1477 BFD_ASSERT (hi
->got
.offset
== (bfd_vma
) -1);
1479 if (ht
->plt
.offset
== (bfd_vma
) -1)
1481 ht
->plt
.offset
= hi
->plt
.offset
;
1482 hi
->plt
.offset
= (bfd_vma
) -1;
1484 BFD_ASSERT (hi
->plt
.offset
== (bfd_vma
) -1);
1486 if (ht
->dynindx
== -1)
1488 ht
->dynindx
= hi
->dynindx
;
1489 ht
->dynstr_index
= hi
->dynstr_index
;
1491 hi
->dynstr_index
= 0;
1493 BFD_ASSERT (hi
->dynindx
== -1);
1495 /* FIXME: There may be other information to copy
1496 over for particular targets. */
1498 /* See if the new flags lead us to realize that
1499 the symbol must be dynamic. */
1505 || ((hi
->elf_link_hash_flags
1506 & ELF_LINK_HASH_REF_DYNAMIC
)
1512 if ((hi
->elf_link_hash_flags
1513 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1519 /* We also need to define an indirection from the
1520 nondefault version of the symbol. */
1522 shortname
= bfd_hash_allocate (&info
->hash
->table
,
1524 if (shortname
== NULL
)
1526 strncpy (shortname
, name
, p
- name
);
1527 strcpy (shortname
+ (p
- name
), p
+ 1);
1529 /* Once again, merge with any existing symbol. */
1530 type_change_ok
= false;
1531 size_change_ok
= false;
1532 if (! elf_merge_symbol (abfd
, info
, shortname
, &sym
, &sec
,
1533 &value
, &hi
, &override
,
1534 &type_change_ok
, &size_change_ok
))
1539 /* Here SHORTNAME is a versioned name, so we
1540 don't expect to see the type of override we
1541 do in the case above. */
1542 (*_bfd_error_handler
)
1543 (_("%s: warning: unexpected redefinition of `%s'"),
1544 bfd_get_filename (abfd
), shortname
);
1548 if (! (_bfd_generic_link_add_one_symbol
1549 (info
, abfd
, shortname
, BSF_INDIRECT
,
1550 bfd_ind_section_ptr
, (bfd_vma
) 0, name
, false,
1551 collect
, (struct bfd_link_hash_entry
**) &hi
)))
1554 /* If there is a duplicate definition somewhere,
1555 then HI may not point to an indirect symbol.
1556 We will have reported an error to the user in
1559 if (hi
->root
.type
== bfd_link_hash_indirect
)
1561 /* If the symbol became indirect, then we
1562 assume that we have not seen a definition
1564 BFD_ASSERT ((hi
->elf_link_hash_flags
1565 & (ELF_LINK_HASH_DEF_DYNAMIC
1566 | ELF_LINK_HASH_DEF_REGULAR
))
1569 /* Copy down any references that we may have
1570 already seen to the symbol which just
1572 h
->elf_link_hash_flags
|=
1573 (hi
->elf_link_hash_flags
1574 & (ELF_LINK_HASH_REF_DYNAMIC
1575 | ELF_LINK_HASH_REF_REGULAR
));
1577 /* Copy over the global and procedure linkage
1578 table offset entries. These may have been
1579 already set up by a check_relocs routine. */
1580 if (h
->got
.offset
== (bfd_vma
) -1)
1582 h
->got
.offset
= hi
->got
.offset
;
1583 hi
->got
.offset
= (bfd_vma
) -1;
1585 BFD_ASSERT (hi
->got
.offset
== (bfd_vma
) -1);
1587 if (h
->plt
.offset
== (bfd_vma
) -1)
1589 h
->plt
.offset
= hi
->plt
.offset
;
1590 hi
->plt
.offset
= (bfd_vma
) -1;
1592 BFD_ASSERT (hi
->got
.offset
== (bfd_vma
) -1);
1594 if (h
->dynindx
== -1)
1596 h
->dynindx
= hi
->dynindx
;
1597 h
->dynstr_index
= hi
->dynstr_index
;
1599 hi
->dynstr_index
= 0;
1601 BFD_ASSERT (hi
->dynindx
== -1);
1603 /* FIXME: There may be other information to
1604 copy over for particular targets. */
1606 /* See if the new flags lead us to realize
1607 that the symbol must be dynamic. */
1613 || ((hi
->elf_link_hash_flags
1614 & ELF_LINK_HASH_REF_DYNAMIC
)
1620 if ((hi
->elf_link_hash_flags
1621 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1630 if (dynsym
&& h
->dynindx
== -1)
1632 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
1634 if (h
->weakdef
!= NULL
1636 && h
->weakdef
->dynindx
== -1)
1638 if (! _bfd_elf_link_record_dynamic_symbol (info
,
1646 /* Now set the weakdefs field correctly for all the weak defined
1647 symbols we found. The only way to do this is to search all the
1648 symbols. Since we only need the information for non functions in
1649 dynamic objects, that's the only time we actually put anything on
1650 the list WEAKS. We need this information so that if a regular
1651 object refers to a symbol defined weakly in a dynamic object, the
1652 real symbol in the dynamic object is also put in the dynamic
1653 symbols; we also must arrange for both symbols to point to the
1654 same memory location. We could handle the general case of symbol
1655 aliasing, but a general symbol alias can only be generated in
1656 assembler code, handling it correctly would be very time
1657 consuming, and other ELF linkers don't handle general aliasing
1659 while (weaks
!= NULL
)
1661 struct elf_link_hash_entry
*hlook
;
1664 struct elf_link_hash_entry
**hpp
;
1665 struct elf_link_hash_entry
**hppend
;
1668 weaks
= hlook
->weakdef
;
1669 hlook
->weakdef
= NULL
;
1671 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
1672 || hlook
->root
.type
== bfd_link_hash_defweak
1673 || hlook
->root
.type
== bfd_link_hash_common
1674 || hlook
->root
.type
== bfd_link_hash_indirect
);
1675 slook
= hlook
->root
.u
.def
.section
;
1676 vlook
= hlook
->root
.u
.def
.value
;
1678 hpp
= elf_sym_hashes (abfd
);
1679 hppend
= hpp
+ extsymcount
;
1680 for (; hpp
< hppend
; hpp
++)
1682 struct elf_link_hash_entry
*h
;
1685 if (h
!= NULL
&& h
!= hlook
1686 && h
->root
.type
== bfd_link_hash_defined
1687 && h
->root
.u
.def
.section
== slook
1688 && h
->root
.u
.def
.value
== vlook
)
1692 /* If the weak definition is in the list of dynamic
1693 symbols, make sure the real definition is put there
1695 if (hlook
->dynindx
!= -1
1696 && h
->dynindx
== -1)
1698 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
1702 /* If the real definition is in the list of dynamic
1703 symbols, make sure the weak definition is put there
1704 as well. If we don't do this, then the dynamic
1705 loader might not merge the entries for the real
1706 definition and the weak definition. */
1707 if (h
->dynindx
!= -1
1708 && hlook
->dynindx
== -1)
1710 if (! _bfd_elf_link_record_dynamic_symbol (info
, hlook
))
1725 if (extversym
!= NULL
)
1731 /* If this object is the same format as the output object, and it is
1732 not a shared library, then let the backend look through the
1735 This is required to build global offset table entries and to
1736 arrange for dynamic relocs. It is not required for the
1737 particular common case of linking non PIC code, even when linking
1738 against shared libraries, but unfortunately there is no way of
1739 knowing whether an object file has been compiled PIC or not.
1740 Looking through the relocs is not particularly time consuming.
1741 The problem is that we must either (1) keep the relocs in memory,
1742 which causes the linker to require additional runtime memory or
1743 (2) read the relocs twice from the input file, which wastes time.
1744 This would be a good case for using mmap.
1746 I have no idea how to handle linking PIC code into a file of a
1747 different format. It probably can't be done. */
1748 check_relocs
= get_elf_backend_data (abfd
)->check_relocs
;
1750 && abfd
->xvec
== info
->hash
->creator
1751 && check_relocs
!= NULL
)
1755 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1757 Elf_Internal_Rela
*internal_relocs
;
1760 if ((o
->flags
& SEC_RELOC
) == 0
1761 || o
->reloc_count
== 0
1762 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
1763 && (o
->flags
& SEC_DEBUGGING
) != 0)
1764 || bfd_is_abs_section (o
->output_section
))
1767 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
1768 (abfd
, o
, (PTR
) NULL
,
1769 (Elf_Internal_Rela
*) NULL
,
1770 info
->keep_memory
));
1771 if (internal_relocs
== NULL
)
1774 ok
= (*check_relocs
) (abfd
, info
, o
, internal_relocs
);
1776 if (! info
->keep_memory
)
1777 free (internal_relocs
);
1784 /* If this is a non-traditional, non-relocateable link, try to
1785 optimize the handling of the .stab/.stabstr sections. */
1787 && ! info
->relocateable
1788 && ! info
->traditional_format
1789 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
1790 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
1792 asection
*stab
, *stabstr
;
1794 stab
= bfd_get_section_by_name (abfd
, ".stab");
1797 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
1799 if (stabstr
!= NULL
)
1801 struct bfd_elf_section_data
*secdata
;
1803 secdata
= elf_section_data (stab
);
1804 if (! _bfd_link_section_stabs (abfd
,
1805 &elf_hash_table (info
)->stab_info
,
1807 &secdata
->stab_info
))
1822 if (extversym
!= NULL
)
1827 /* Create some sections which will be filled in with dynamic linking
1828 information. ABFD is an input file which requires dynamic sections
1829 to be created. The dynamic sections take up virtual memory space
1830 when the final executable is run, so we need to create them before
1831 addresses are assigned to the output sections. We work out the
1832 actual contents and size of these sections later. */
1835 elf_link_create_dynamic_sections (abfd
, info
)
1837 struct bfd_link_info
*info
;
1840 register asection
*s
;
1841 struct elf_link_hash_entry
*h
;
1842 struct elf_backend_data
*bed
;
1844 if (elf_hash_table (info
)->dynamic_sections_created
)
1847 /* Make sure that all dynamic sections use the same input BFD. */
1848 if (elf_hash_table (info
)->dynobj
== NULL
)
1849 elf_hash_table (info
)->dynobj
= abfd
;
1851 abfd
= elf_hash_table (info
)->dynobj
;
1853 /* Note that we set the SEC_IN_MEMORY flag for all of these
1855 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
1856 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
1858 /* A dynamically linked executable has a .interp section, but a
1859 shared library does not. */
1862 s
= bfd_make_section (abfd
, ".interp");
1864 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
1868 /* Create sections to hold version informations. These are removed
1869 if they are not needed. */
1870 s
= bfd_make_section (abfd
, ".gnu.version_d");
1872 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1873 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
1876 s
= bfd_make_section (abfd
, ".gnu.version");
1878 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1879 || ! bfd_set_section_alignment (abfd
, s
, 1))
1882 s
= bfd_make_section (abfd
, ".gnu.version_r");
1884 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1885 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
1888 s
= bfd_make_section (abfd
, ".dynsym");
1890 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1891 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
1894 s
= bfd_make_section (abfd
, ".dynstr");
1896 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
1899 /* Create a strtab to hold the dynamic symbol names. */
1900 if (elf_hash_table (info
)->dynstr
== NULL
)
1902 elf_hash_table (info
)->dynstr
= elf_stringtab_init ();
1903 if (elf_hash_table (info
)->dynstr
== NULL
)
1907 s
= bfd_make_section (abfd
, ".dynamic");
1909 || ! bfd_set_section_flags (abfd
, s
, flags
)
1910 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
1913 /* The special symbol _DYNAMIC is always set to the start of the
1914 .dynamic section. This call occurs before we have processed the
1915 symbols for any dynamic object, so we don't have to worry about
1916 overriding a dynamic definition. We could set _DYNAMIC in a
1917 linker script, but we only want to define it if we are, in fact,
1918 creating a .dynamic section. We don't want to define it if there
1919 is no .dynamic section, since on some ELF platforms the start up
1920 code examines it to decide how to initialize the process. */
1922 if (! (_bfd_generic_link_add_one_symbol
1923 (info
, abfd
, "_DYNAMIC", BSF_GLOBAL
, s
, (bfd_vma
) 0,
1924 (const char *) NULL
, false, get_elf_backend_data (abfd
)->collect
,
1925 (struct bfd_link_hash_entry
**) &h
)))
1927 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
1928 h
->type
= STT_OBJECT
;
1931 && ! _bfd_elf_link_record_dynamic_symbol (info
, h
))
1934 s
= bfd_make_section (abfd
, ".hash");
1936 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
1937 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
1940 /* Let the backend create the rest of the sections. This lets the
1941 backend set the right flags. The backend will normally create
1942 the .got and .plt sections. */
1943 bed
= get_elf_backend_data (abfd
);
1944 if (! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
1947 elf_hash_table (info
)->dynamic_sections_created
= true;
1952 /* Add an entry to the .dynamic table. */
1955 elf_add_dynamic_entry (info
, tag
, val
)
1956 struct bfd_link_info
*info
;
1960 Elf_Internal_Dyn dyn
;
1964 bfd_byte
*newcontents
;
1966 dynobj
= elf_hash_table (info
)->dynobj
;
1968 s
= bfd_get_section_by_name (dynobj
, ".dynamic");
1969 BFD_ASSERT (s
!= NULL
);
1971 newsize
= s
->_raw_size
+ sizeof (Elf_External_Dyn
);
1972 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
1973 if (newcontents
== NULL
)
1977 dyn
.d_un
.d_val
= val
;
1978 elf_swap_dyn_out (dynobj
, &dyn
,
1979 (Elf_External_Dyn
*) (newcontents
+ s
->_raw_size
));
1981 s
->_raw_size
= newsize
;
1982 s
->contents
= newcontents
;
1988 /* Read and swap the relocs for a section. They may have been cached.
1989 If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL,
1990 they are used as buffers to read into. They are known to be large
1991 enough. If the INTERNAL_RELOCS relocs argument is NULL, the return
1992 value is allocated using either malloc or bfd_alloc, according to
1993 the KEEP_MEMORY argument. */
1996 NAME(_bfd_elf
,link_read_relocs
) (abfd
, o
, external_relocs
, internal_relocs
,
2000 PTR external_relocs
;
2001 Elf_Internal_Rela
*internal_relocs
;
2002 boolean keep_memory
;
2004 Elf_Internal_Shdr
*rel_hdr
;
2006 Elf_Internal_Rela
*alloc2
= NULL
;
2008 if (elf_section_data (o
)->relocs
!= NULL
)
2009 return elf_section_data (o
)->relocs
;
2011 if (o
->reloc_count
== 0)
2014 rel_hdr
= &elf_section_data (o
)->rel_hdr
;
2016 if (internal_relocs
== NULL
)
2020 size
= o
->reloc_count
* sizeof (Elf_Internal_Rela
);
2022 internal_relocs
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2024 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2025 if (internal_relocs
== NULL
)
2029 if (external_relocs
== NULL
)
2031 alloc1
= (PTR
) bfd_malloc ((size_t) rel_hdr
->sh_size
);
2034 external_relocs
= alloc1
;
2037 if ((bfd_seek (abfd
, rel_hdr
->sh_offset
, SEEK_SET
) != 0)
2038 || (bfd_read (external_relocs
, 1, rel_hdr
->sh_size
, abfd
)
2039 != rel_hdr
->sh_size
))
2042 /* Swap in the relocs. For convenience, we always produce an
2043 Elf_Internal_Rela array; if the relocs are Rel, we set the addend
2045 if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
2047 Elf_External_Rel
*erel
;
2048 Elf_External_Rel
*erelend
;
2049 Elf_Internal_Rela
*irela
;
2051 erel
= (Elf_External_Rel
*) external_relocs
;
2052 erelend
= erel
+ o
->reloc_count
;
2053 irela
= internal_relocs
;
2054 for (; erel
< erelend
; erel
++, irela
++)
2056 Elf_Internal_Rel irel
;
2058 elf_swap_reloc_in (abfd
, erel
, &irel
);
2059 irela
->r_offset
= irel
.r_offset
;
2060 irela
->r_info
= irel
.r_info
;
2061 irela
->r_addend
= 0;
2066 Elf_External_Rela
*erela
;
2067 Elf_External_Rela
*erelaend
;
2068 Elf_Internal_Rela
*irela
;
2070 BFD_ASSERT (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rela
));
2072 erela
= (Elf_External_Rela
*) external_relocs
;
2073 erelaend
= erela
+ o
->reloc_count
;
2074 irela
= internal_relocs
;
2075 for (; erela
< erelaend
; erela
++, irela
++)
2076 elf_swap_reloca_in (abfd
, erela
, irela
);
2079 /* Cache the results for next time, if we can. */
2081 elf_section_data (o
)->relocs
= internal_relocs
;
2086 /* Don't free alloc2, since if it was allocated we are passing it
2087 back (under the name of internal_relocs). */
2089 return internal_relocs
;
2100 /* Record an assignment to a symbol made by a linker script. We need
2101 this in case some dynamic object refers to this symbol. */
2105 NAME(bfd_elf
,record_link_assignment
) (output_bfd
, info
, name
, provide
)
2107 struct bfd_link_info
*info
;
2111 struct elf_link_hash_entry
*h
;
2113 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2116 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, true, true, false);
2120 if (h
->root
.type
== bfd_link_hash_new
)
2121 h
->elf_link_hash_flags
&=~ ELF_LINK_NON_ELF
;
2123 /* If this symbol is being provided by the linker script, and it is
2124 currently defined by a dynamic object, but not by a regular
2125 object, then mark it as undefined so that the generic linker will
2126 force the correct value. */
2128 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2129 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2130 h
->root
.type
= bfd_link_hash_undefined
;
2132 /* If this symbol is not being provided by the linker script, and it is
2133 currently defined by a dynamic object, but not by a regular object,
2134 then clear out any version information because the symbol will not be
2135 associated with the dynamic object any more. */
2137 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2138 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2139 h
->verinfo
.verdef
= NULL
;
2141 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2142 h
->type
= STT_OBJECT
;
2144 if (((h
->elf_link_hash_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
2145 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0
2147 && h
->dynindx
== -1)
2149 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2152 /* If this is a weak defined symbol, and we know a corresponding
2153 real symbol from the same dynamic object, make sure the real
2154 symbol is also made into a dynamic symbol. */
2155 if (h
->weakdef
!= NULL
2156 && h
->weakdef
->dynindx
== -1)
2158 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
->weakdef
))
2166 /* This structure is used to pass information to
2167 elf_link_assign_sym_version. */
2169 struct elf_assign_sym_version_info
2173 /* General link information. */
2174 struct bfd_link_info
*info
;
2176 struct bfd_elf_version_tree
*verdefs
;
2177 /* Whether we are exporting all dynamic symbols. */
2178 boolean export_dynamic
;
2179 /* Whether we removed any symbols from the dynamic symbol table. */
2180 boolean removed_dynamic
;
2181 /* Whether we had a failure. */
2185 /* This structure is used to pass information to
2186 elf_link_find_version_dependencies. */
2188 struct elf_find_verdep_info
2192 /* General link information. */
2193 struct bfd_link_info
*info
;
2194 /* The number of dependencies. */
2196 /* Whether we had a failure. */
2200 /* Array used to determine the number of hash table buckets to use
2201 based on the number of symbols there are. If there are fewer than
2202 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
2203 fewer than 37 we use 17 buckets, and so forth. We never use more
2204 than 32771 buckets. */
2206 static const size_t elf_buckets
[] =
2208 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
2212 /* Compute bucket count for hashing table. We do not use a static set
2213 of possible tables sizes anymore. Instead we determine for all
2214 possible reasonable sizes of the table the outcome (i.e., the
2215 number of collisions etc) and choose the best solution. The
2216 weighting functions are not too simple to allow the table to grow
2217 without bounds. Instead one of the weighting factors is the size.
2218 Therefore the result is always a good payoff between few collisions
2219 (= short chain lengths) and table size. */
2221 compute_bucket_count (info
)
2222 struct bfd_link_info
*info
;
2224 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
2226 unsigned long int *hashcodes
;
2227 unsigned long int *hashcodesp
;
2228 unsigned long int i
;
2230 /* Compute the hash values for all exported symbols. At the same
2231 time store the values in an array so that we could use them for
2233 hashcodes
= (unsigned long int *) bfd_malloc (dynsymcount
2234 * sizeof (unsigned long int));
2235 if (hashcodes
== NULL
)
2237 hashcodesp
= hashcodes
;
2239 /* Put all hash values in HASHCODES. */
2240 elf_link_hash_traverse (elf_hash_table (info
),
2241 elf_collect_hash_codes
, &hashcodesp
);
2243 /* We have a problem here. The following code to optimize the table size
2244 requires an integer type with more the 32 bits. If BFD_HOST_U_64_BIT
2245 is set or GCC 2 is used we know about such a type. */
2246 #if defined BFD_HOST_U_64_BIT || __GNUC__ >= 2
2247 # ifndef BFD_HOST_U_64_BIT
2248 # define BFD_HOST_U_64_BIT unsigned long long int
2250 if (info
->optimize
== true)
2252 unsigned long int nsyms
= hashcodesp
- hashcodes
;
2255 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
2256 unsigned long int *counts
;
2258 /* Possible optimization parameters: if we have NSYMS symbols we say
2259 that the hashing table must at least have NSYMS/4 and at most
2261 minsize
= nsyms
/ 4;
2264 best_size
= maxsize
= nsyms
* 2;
2266 /* Create array where we count the collisions in. We must use bfd_malloc
2267 since the size could be large. */
2268 counts
= (unsigned long int *) bfd_malloc (maxsize
2269 * sizeof (unsigned long int));
2276 /* Compute the "optimal" size for the hash table. The criteria is a
2277 minimal chain length. The minor criteria is (of course) the size
2279 for (i
= minsize
; i
< maxsize
; ++i
)
2281 /* Walk through the array of hashcodes and count the collisions. */
2282 BFD_HOST_U_64_BIT max
;
2283 unsigned long int j
;
2284 unsigned long int fact
;
2286 memset (counts
, '\0', i
* sizeof (unsigned long int));
2288 /* Determine how often each hash bucket is used. */
2289 for (j
= 0; j
< nsyms
; ++j
)
2290 ++counts
[hashcodes
[j
] % i
];
2292 /* For the weight function we need some information about the
2293 pagesize on the target. This is information need not be 100%
2294 accurate. Since this information is not available (so far) we
2295 define it here to a reasonable default value. If it is crucial
2296 to have a better value some day simply define this value. */
2297 # ifndef BFD_TARGET_PAGESIZE
2298 # define BFD_TARGET_PAGESIZE (4096)
2301 /* We in any case need 2 + NSYMS entries for the size values and
2303 max
= (2 + nsyms
) * (ARCH_SIZE
/ 8);
2306 /* Variant 1: optimize for short chains. We add the squares
2307 of all the chain lengths (which favous many small chain
2308 over a few long chains). */
2309 for (j
= 0; j
< i
; ++j
)
2310 max
+= counts
[j
] * counts
[j
];
2312 /* This adds penalties for the overall size of the table. */
2313 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2316 /* Variant 2: Optimize a lot more for small table. Here we
2317 also add squares of the size but we also add penalties for
2318 empty slots (the +1 term). */
2319 for (j
= 0; j
< i
; ++j
)
2320 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
2322 /* The overall size of the table is considered, but not as
2323 strong as in variant 1, where it is squared. */
2324 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2328 /* Compare with current best results. */
2329 if (max
< best_chlen
)
2341 /* This is the fallback solution if no 64bit type is available or if we
2342 are not supposed to spend much time on optimizations. We select the
2343 bucket count using a fixed set of numbers. */
2344 for (i
= 0; elf_buckets
[i
] != 0; i
++)
2346 best_size
= elf_buckets
[i
];
2347 if (dynsymcount
< elf_buckets
[i
+ 1])
2352 /* Free the arrays we needed. */
2358 /* Set up the sizes and contents of the ELF dynamic sections. This is
2359 called by the ELF linker emulation before_allocation routine. We
2360 must set the sizes of the sections before the linker sets the
2361 addresses of the various sections. */
2364 NAME(bfd_elf
,size_dynamic_sections
) (output_bfd
, soname
, rpath
,
2365 export_dynamic
, filter_shlib
,
2366 auxiliary_filters
, info
, sinterpptr
,
2371 boolean export_dynamic
;
2372 const char *filter_shlib
;
2373 const char * const *auxiliary_filters
;
2374 struct bfd_link_info
*info
;
2375 asection
**sinterpptr
;
2376 struct bfd_elf_version_tree
*verdefs
;
2378 bfd_size_type soname_indx
;
2380 struct elf_backend_data
*bed
;
2381 bfd_size_type old_dynsymcount
;
2382 struct elf_assign_sym_version_info asvinfo
;
2386 soname_indx
= (bfd_size_type
) -1;
2388 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2391 /* The backend may have to create some sections regardless of whether
2392 we're dynamic or not. */
2393 bed
= get_elf_backend_data (output_bfd
);
2394 if (bed
->elf_backend_always_size_sections
2395 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
2398 dynobj
= elf_hash_table (info
)->dynobj
;
2400 /* If there were no dynamic objects in the link, there is nothing to
2405 /* If we are supposed to export all symbols into the dynamic symbol
2406 table (this is not the normal case), then do so. */
2409 struct elf_info_failed eif
;
2413 elf_link_hash_traverse (elf_hash_table (info
), elf_export_symbol
,
2419 if (elf_hash_table (info
)->dynamic_sections_created
)
2421 struct elf_info_failed eif
;
2422 struct elf_link_hash_entry
*h
;
2423 bfd_size_type strsize
;
2425 *sinterpptr
= bfd_get_section_by_name (dynobj
, ".interp");
2426 BFD_ASSERT (*sinterpptr
!= NULL
|| info
->shared
);
2430 soname_indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2431 soname
, true, true);
2432 if (soname_indx
== (bfd_size_type
) -1
2433 || ! elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
2439 if (! elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
2447 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
, rpath
,
2449 if (indx
== (bfd_size_type
) -1
2450 || ! elf_add_dynamic_entry (info
, DT_RPATH
, indx
))
2454 if (filter_shlib
!= NULL
)
2458 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2459 filter_shlib
, true, true);
2460 if (indx
== (bfd_size_type
) -1
2461 || ! elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
2465 if (auxiliary_filters
!= NULL
)
2467 const char * const *p
;
2469 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
2473 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2475 if (indx
== (bfd_size_type
) -1
2476 || ! elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
2481 /* Attach all the symbols to their version information. */
2482 asvinfo
.output_bfd
= output_bfd
;
2483 asvinfo
.info
= info
;
2484 asvinfo
.verdefs
= verdefs
;
2485 asvinfo
.export_dynamic
= export_dynamic
;
2486 asvinfo
.removed_dynamic
= false;
2487 asvinfo
.failed
= false;
2489 elf_link_hash_traverse (elf_hash_table (info
),
2490 elf_link_assign_sym_version
,
2495 /* Find all symbols which were defined in a dynamic object and make
2496 the backend pick a reasonable value for them. */
2499 elf_link_hash_traverse (elf_hash_table (info
),
2500 elf_adjust_dynamic_symbol
,
2505 /* Add some entries to the .dynamic section. We fill in some of the
2506 values later, in elf_bfd_final_link, but we must add the entries
2507 now so that we know the final size of the .dynamic section. */
2508 h
= elf_link_hash_lookup (elf_hash_table (info
), "_init", false,
2511 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
2512 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
2514 if (! elf_add_dynamic_entry (info
, DT_INIT
, 0))
2517 h
= elf_link_hash_lookup (elf_hash_table (info
), "_fini", false,
2520 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
2521 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
2523 if (! elf_add_dynamic_entry (info
, DT_FINI
, 0))
2526 strsize
= _bfd_stringtab_size (elf_hash_table (info
)->dynstr
);
2527 if (! elf_add_dynamic_entry (info
, DT_HASH
, 0)
2528 || ! elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
2529 || ! elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
2530 || ! elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
2531 || ! elf_add_dynamic_entry (info
, DT_SYMENT
,
2532 sizeof (Elf_External_Sym
)))
2536 /* The backend must work out the sizes of all the other dynamic
2538 old_dynsymcount
= elf_hash_table (info
)->dynsymcount
;
2539 if (bed
->elf_backend_size_dynamic_sections
2540 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
2543 if (elf_hash_table (info
)->dynamic_sections_created
)
2548 size_t bucketcount
= 0;
2549 Elf_Internal_Sym isym
;
2551 /* Set up the version definition section. */
2552 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
2553 BFD_ASSERT (s
!= NULL
);
2555 /* We may have created additional version definitions if we are
2556 just linking a regular application. */
2557 verdefs
= asvinfo
.verdefs
;
2559 if (verdefs
== NULL
)
2563 /* Don't include this section in the output file. */
2564 for (spp
= &output_bfd
->sections
;
2565 *spp
!= s
->output_section
;
2566 spp
= &(*spp
)->next
)
2568 *spp
= s
->output_section
->next
;
2569 --output_bfd
->section_count
;
2575 struct bfd_elf_version_tree
*t
;
2577 Elf_Internal_Verdef def
;
2578 Elf_Internal_Verdaux defaux
;
2580 if (asvinfo
.removed_dynamic
)
2582 /* Some dynamic symbols were changed to be local
2583 symbols. In this case, we renumber all of the
2584 dynamic symbols, so that we don't have a hole. If
2585 the backend changed dynsymcount, then assume that the
2586 new symbols are at the start. This is the case on
2587 the MIPS. FIXME: The names of the removed symbols
2588 will still be in the dynamic string table, wasting
2590 elf_hash_table (info
)->dynsymcount
=
2591 1 + (elf_hash_table (info
)->dynsymcount
- old_dynsymcount
);
2592 elf_link_hash_traverse (elf_hash_table (info
),
2593 elf_link_renumber_dynsyms
,
2600 /* Make space for the base version. */
2601 size
+= sizeof (Elf_External_Verdef
);
2602 size
+= sizeof (Elf_External_Verdaux
);
2605 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
2607 struct bfd_elf_version_deps
*n
;
2609 size
+= sizeof (Elf_External_Verdef
);
2610 size
+= sizeof (Elf_External_Verdaux
);
2613 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
2614 size
+= sizeof (Elf_External_Verdaux
);
2617 s
->_raw_size
= size
;
2618 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
2619 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2622 /* Fill in the version definition section. */
2626 def
.vd_version
= VER_DEF_CURRENT
;
2627 def
.vd_flags
= VER_FLG_BASE
;
2630 def
.vd_aux
= sizeof (Elf_External_Verdef
);
2631 def
.vd_next
= (sizeof (Elf_External_Verdef
)
2632 + sizeof (Elf_External_Verdaux
));
2634 if (soname_indx
!= (bfd_size_type
) -1)
2636 def
.vd_hash
= bfd_elf_hash ((const unsigned char *) soname
);
2637 defaux
.vda_name
= soname_indx
;
2644 name
= output_bfd
->filename
;
2645 def
.vd_hash
= bfd_elf_hash ((const unsigned char *) name
);
2646 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2648 if (indx
== (bfd_size_type
) -1)
2650 defaux
.vda_name
= indx
;
2652 defaux
.vda_next
= 0;
2654 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
2655 (Elf_External_Verdef
*)p
);
2656 p
+= sizeof (Elf_External_Verdef
);
2657 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
2658 (Elf_External_Verdaux
*) p
);
2659 p
+= sizeof (Elf_External_Verdaux
);
2661 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
2664 struct bfd_elf_version_deps
*n
;
2665 struct elf_link_hash_entry
*h
;
2668 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
2671 /* Add a symbol representing this version. */
2673 if (! (_bfd_generic_link_add_one_symbol
2674 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
2675 (bfd_vma
) 0, (const char *) NULL
, false,
2676 get_elf_backend_data (dynobj
)->collect
,
2677 (struct bfd_link_hash_entry
**) &h
)))
2679 h
->elf_link_hash_flags
&= ~ ELF_LINK_NON_ELF
;
2680 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2681 h
->type
= STT_OBJECT
;
2682 h
->verinfo
.vertree
= t
;
2684 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2687 def
.vd_version
= VER_DEF_CURRENT
;
2689 if (t
->globals
== NULL
&& t
->locals
== NULL
&& ! t
->used
)
2690 def
.vd_flags
|= VER_FLG_WEAK
;
2691 def
.vd_ndx
= t
->vernum
+ 1;
2692 def
.vd_cnt
= cdeps
+ 1;
2693 def
.vd_hash
= bfd_elf_hash ((const unsigned char *) t
->name
);
2694 def
.vd_aux
= sizeof (Elf_External_Verdef
);
2695 if (t
->next
!= NULL
)
2696 def
.vd_next
= (sizeof (Elf_External_Verdef
)
2697 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
2701 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
2702 (Elf_External_Verdef
*) p
);
2703 p
+= sizeof (Elf_External_Verdef
);
2705 defaux
.vda_name
= h
->dynstr_index
;
2706 if (t
->deps
== NULL
)
2707 defaux
.vda_next
= 0;
2709 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
2710 t
->name_indx
= defaux
.vda_name
;
2712 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
2713 (Elf_External_Verdaux
*) p
);
2714 p
+= sizeof (Elf_External_Verdaux
);
2716 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
2718 if (n
->version_needed
== NULL
)
2720 /* This can happen if there was an error in the
2722 defaux
.vda_name
= 0;
2725 defaux
.vda_name
= n
->version_needed
->name_indx
;
2726 if (n
->next
== NULL
)
2727 defaux
.vda_next
= 0;
2729 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
2731 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
2732 (Elf_External_Verdaux
*) p
);
2733 p
+= sizeof (Elf_External_Verdaux
);
2737 if (! elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
2738 || ! elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
2741 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
2744 /* Work out the size of the version reference section. */
2746 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
2747 BFD_ASSERT (s
!= NULL
);
2749 struct elf_find_verdep_info sinfo
;
2751 sinfo
.output_bfd
= output_bfd
;
2753 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
2754 if (sinfo
.vers
== 0)
2756 sinfo
.failed
= false;
2758 elf_link_hash_traverse (elf_hash_table (info
),
2759 elf_link_find_version_dependencies
,
2762 if (elf_tdata (output_bfd
)->verref
== NULL
)
2766 /* We don't have any version definitions, so we can just
2767 remove the section. */
2769 for (spp
= &output_bfd
->sections
;
2770 *spp
!= s
->output_section
;
2771 spp
= &(*spp
)->next
)
2773 *spp
= s
->output_section
->next
;
2774 --output_bfd
->section_count
;
2778 Elf_Internal_Verneed
*t
;
2783 /* Build the version definition section. */
2786 for (t
= elf_tdata (output_bfd
)->verref
;
2790 Elf_Internal_Vernaux
*a
;
2792 size
+= sizeof (Elf_External_Verneed
);
2794 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2795 size
+= sizeof (Elf_External_Vernaux
);
2798 s
->_raw_size
= size
;
2799 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, size
);
2800 if (s
->contents
== NULL
)
2804 for (t
= elf_tdata (output_bfd
)->verref
;
2809 Elf_Internal_Vernaux
*a
;
2813 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2816 t
->vn_version
= VER_NEED_CURRENT
;
2818 if (elf_dt_name (t
->vn_bfd
) != NULL
)
2819 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2820 elf_dt_name (t
->vn_bfd
),
2823 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2824 t
->vn_bfd
->filename
, true, false);
2825 if (indx
== (bfd_size_type
) -1)
2828 t
->vn_aux
= sizeof (Elf_External_Verneed
);
2829 if (t
->vn_nextref
== NULL
)
2832 t
->vn_next
= (sizeof (Elf_External_Verneed
)
2833 + caux
* sizeof (Elf_External_Vernaux
));
2835 _bfd_elf_swap_verneed_out (output_bfd
, t
,
2836 (Elf_External_Verneed
*) p
);
2837 p
+= sizeof (Elf_External_Verneed
);
2839 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2841 a
->vna_hash
= bfd_elf_hash ((const unsigned char *)
2843 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2844 a
->vna_nodename
, true, false);
2845 if (indx
== (bfd_size_type
) -1)
2848 if (a
->vna_nextptr
== NULL
)
2851 a
->vna_next
= sizeof (Elf_External_Vernaux
);
2853 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
2854 (Elf_External_Vernaux
*) p
);
2855 p
+= sizeof (Elf_External_Vernaux
);
2859 if (! elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
2860 || ! elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
2863 elf_tdata (output_bfd
)->cverrefs
= crefs
;
2867 dynsymcount
= elf_hash_table (info
)->dynsymcount
;
2869 /* Work out the size of the symbol version section. */
2870 s
= bfd_get_section_by_name (dynobj
, ".gnu.version");
2871 BFD_ASSERT (s
!= NULL
);
2872 if (dynsymcount
== 0
2873 || (verdefs
== NULL
&& elf_tdata (output_bfd
)->verref
== NULL
))
2877 /* We don't need any symbol versions; just discard the
2879 for (spp
= &output_bfd
->sections
;
2880 *spp
!= s
->output_section
;
2881 spp
= &(*spp
)->next
)
2883 *spp
= s
->output_section
->next
;
2884 --output_bfd
->section_count
;
2888 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Versym
);
2889 s
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, s
->_raw_size
);
2890 if (s
->contents
== NULL
)
2893 if (! elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
2897 /* Set the size of the .dynsym and .hash sections. We counted
2898 the number of dynamic symbols in elf_link_add_object_symbols.
2899 We will build the contents of .dynsym and .hash when we build
2900 the final symbol table, because until then we do not know the
2901 correct value to give the symbols. We built the .dynstr
2902 section as we went along in elf_link_add_object_symbols. */
2903 s
= bfd_get_section_by_name (dynobj
, ".dynsym");
2904 BFD_ASSERT (s
!= NULL
);
2905 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Sym
);
2906 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
2907 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2910 /* The first entry in .dynsym is a dummy symbol. */
2917 elf_swap_symbol_out (output_bfd
, &isym
,
2918 (PTR
) (Elf_External_Sym
*) s
->contents
);
2920 /* Compute the size of the hashing table. As a side effect this
2921 computes the hash values for all the names we export. */
2922 bucketcount
= compute_bucket_count (info
);
2924 s
= bfd_get_section_by_name (dynobj
, ".hash");
2925 BFD_ASSERT (s
!= NULL
);
2926 s
->_raw_size
= (2 + bucketcount
+ dynsymcount
) * (ARCH_SIZE
/ 8);
2927 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
2928 if (s
->contents
== NULL
)
2930 memset (s
->contents
, 0, (size_t) s
->_raw_size
);
2932 put_word (output_bfd
, bucketcount
, s
->contents
);
2933 put_word (output_bfd
, dynsymcount
, s
->contents
+ (ARCH_SIZE
/ 8));
2935 elf_hash_table (info
)->bucketcount
= bucketcount
;
2937 s
= bfd_get_section_by_name (dynobj
, ".dynstr");
2938 BFD_ASSERT (s
!= NULL
);
2939 s
->_raw_size
= _bfd_stringtab_size (elf_hash_table (info
)->dynstr
);
2941 if (! elf_add_dynamic_entry (info
, DT_NULL
, 0))
2948 /* Fix up the flags for a symbol. This handles various cases which
2949 can only be fixed after all the input files are seen. This is
2950 currently called by both adjust_dynamic_symbol and
2951 assign_sym_version, which is unnecessary but perhaps more robust in
2952 the face of future changes. */
2955 elf_fix_symbol_flags (h
, eif
)
2956 struct elf_link_hash_entry
*h
;
2957 struct elf_info_failed
*eif
;
2959 /* If this symbol was mentioned in a non-ELF file, try to set
2960 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
2961 permit a non-ELF file to correctly refer to a symbol defined in
2962 an ELF dynamic object. */
2963 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_ELF
) != 0)
2965 if (h
->root
.type
!= bfd_link_hash_defined
2966 && h
->root
.type
!= bfd_link_hash_defweak
)
2967 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
2970 if (h
->root
.u
.def
.section
->owner
!= NULL
2971 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
2972 == bfd_target_elf_flavour
))
2973 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
2975 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2978 if (h
->dynindx
== -1
2979 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2980 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0))
2982 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
2990 /* If this is a final link, and the symbol was defined as a common
2991 symbol in a regular object file, and there was no definition in
2992 any dynamic object, then the linker will have allocated space for
2993 the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR
2994 flag will not have been set. */
2995 if (h
->root
.type
== bfd_link_hash_defined
2996 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
2997 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
2998 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
2999 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
3000 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3002 /* If -Bsymbolic was used (which means to bind references to global
3003 symbols to the definition within the shared object), and this
3004 symbol was defined in a regular object, then it actually doesn't
3005 need a PLT entry. */
3006 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0
3007 && eif
->info
->shared
3008 && eif
->info
->symbolic
3009 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3011 h
->elf_link_hash_flags
&=~ ELF_LINK_HASH_NEEDS_PLT
;
3012 h
->plt
.offset
= (bfd_vma
) -1;
3018 /* Make the backend pick a good value for a dynamic symbol. This is
3019 called via elf_link_hash_traverse, and also calls itself
3023 elf_adjust_dynamic_symbol (h
, data
)
3024 struct elf_link_hash_entry
*h
;
3027 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
3029 struct elf_backend_data
*bed
;
3031 /* Ignore indirect symbols. These are added by the versioning code. */
3032 if (h
->root
.type
== bfd_link_hash_indirect
)
3035 /* Fix the symbol flags. */
3036 if (! elf_fix_symbol_flags (h
, eif
))
3039 /* If this symbol does not require a PLT entry, and it is not
3040 defined by a dynamic object, or is not referenced by a regular
3041 object, ignore it. We do have to handle a weak defined symbol,
3042 even if no regular object refers to it, if we decided to add it
3043 to the dynamic symbol table. FIXME: Do we normally need to worry
3044 about symbols which are defined by one dynamic object and
3045 referenced by another one? */
3046 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) == 0
3047 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
3048 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3049 || ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0
3050 && (h
->weakdef
== NULL
|| h
->weakdef
->dynindx
== -1))))
3052 h
->plt
.offset
= (bfd_vma
) -1;
3056 /* If we've already adjusted this symbol, don't do it again. This
3057 can happen via a recursive call. */
3058 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DYNAMIC_ADJUSTED
) != 0)
3061 /* Don't look at this symbol again. Note that we must set this
3062 after checking the above conditions, because we may look at a
3063 symbol once, decide not to do anything, and then get called
3064 recursively later after REF_REGULAR is set below. */
3065 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DYNAMIC_ADJUSTED
;
3067 /* If this is a weak definition, and we know a real definition, and
3068 the real symbol is not itself defined by a regular object file,
3069 then get a good value for the real definition. We handle the
3070 real symbol first, for the convenience of the backend routine.
3072 Note that there is a confusing case here. If the real definition
3073 is defined by a regular object file, we don't get the real symbol
3074 from the dynamic object, but we do get the weak symbol. If the
3075 processor backend uses a COPY reloc, then if some routine in the
3076 dynamic object changes the real symbol, we will not see that
3077 change in the corresponding weak symbol. This is the way other
3078 ELF linkers work as well, and seems to be a result of the shared
3081 I will clarify this issue. Most SVR4 shared libraries define the
3082 variable _timezone and define timezone as a weak synonym. The
3083 tzset call changes _timezone. If you write
3084 extern int timezone;
3086 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
3087 you might expect that, since timezone is a synonym for _timezone,
3088 the same number will print both times. However, if the processor
3089 backend uses a COPY reloc, then actually timezone will be copied
3090 into your process image, and, since you define _timezone
3091 yourself, _timezone will not. Thus timezone and _timezone will
3092 wind up at different memory locations. The tzset call will set
3093 _timezone, leaving timezone unchanged. */
3095 if (h
->weakdef
!= NULL
)
3097 struct elf_link_hash_entry
*weakdef
;
3099 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3100 || h
->root
.type
== bfd_link_hash_defweak
);
3101 weakdef
= h
->weakdef
;
3102 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
3103 || weakdef
->root
.type
== bfd_link_hash_defweak
);
3104 BFD_ASSERT (weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
);
3105 if ((weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3107 /* This symbol is defined by a regular object file, so we
3108 will not do anything special. Clear weakdef for the
3109 convenience of the processor backend. */
3114 /* There is an implicit reference by a regular object file
3115 via the weak symbol. */
3116 weakdef
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
3117 if (! elf_adjust_dynamic_symbol (weakdef
, (PTR
) eif
))
3122 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
3123 bed
= get_elf_backend_data (dynobj
);
3124 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
3133 /* This routine is used to export all defined symbols into the dynamic
3134 symbol table. It is called via elf_link_hash_traverse. */
3137 elf_export_symbol (h
, data
)
3138 struct elf_link_hash_entry
*h
;
3141 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
3143 /* Ignore indirect symbols. These are added by the versioning code. */
3144 if (h
->root
.type
== bfd_link_hash_indirect
)
3147 if (h
->dynindx
== -1
3148 && (h
->elf_link_hash_flags
3149 & (ELF_LINK_HASH_DEF_REGULAR
| ELF_LINK_HASH_REF_REGULAR
)) != 0)
3151 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
3161 /* Look through the symbols which are defined in other shared
3162 libraries and referenced here. Update the list of version
3163 dependencies. This will be put into the .gnu.version_r section.
3164 This function is called via elf_link_hash_traverse. */
3167 elf_link_find_version_dependencies (h
, data
)
3168 struct elf_link_hash_entry
*h
;
3171 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
3172 Elf_Internal_Verneed
*t
;
3173 Elf_Internal_Vernaux
*a
;
3175 /* We only care about symbols defined in shared objects with version
3177 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3178 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
3180 || h
->verinfo
.verdef
== NULL
)
3183 /* See if we already know about this version. */
3184 for (t
= elf_tdata (rinfo
->output_bfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
3186 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
3189 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3190 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
3196 /* This is a new version. Add it to tree we are building. */
3200 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->output_bfd
, sizeof *t
);
3203 rinfo
->failed
= true;
3207 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
3208 t
->vn_nextref
= elf_tdata (rinfo
->output_bfd
)->verref
;
3209 elf_tdata (rinfo
->output_bfd
)->verref
= t
;
3212 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->output_bfd
, sizeof *a
);
3214 /* Note that we are copying a string pointer here, and testing it
3215 above. If bfd_elf_string_from_elf_section is ever changed to
3216 discard the string data when low in memory, this will have to be
3218 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
3220 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
3221 a
->vna_nextptr
= t
->vn_auxptr
;
3223 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
3226 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
3233 /* Figure out appropriate versions for all the symbols. We may not
3234 have the version number script until we have read all of the input
3235 files, so until that point we don't know which symbols should be
3236 local. This function is called via elf_link_hash_traverse. */
3239 elf_link_assign_sym_version (h
, data
)
3240 struct elf_link_hash_entry
*h
;
3243 struct elf_assign_sym_version_info
*sinfo
=
3244 (struct elf_assign_sym_version_info
*) data
;
3245 struct bfd_link_info
*info
= sinfo
->info
;
3246 struct elf_info_failed eif
;
3249 /* Fix the symbol flags. */
3252 if (! elf_fix_symbol_flags (h
, &eif
))
3255 sinfo
->failed
= true;
3259 /* We only need version numbers for symbols defined in regular
3261 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
3264 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
3265 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
3267 struct bfd_elf_version_tree
*t
;
3272 /* There are two consecutive ELF_VER_CHR characters if this is
3273 not a hidden symbol. */
3275 if (*p
== ELF_VER_CHR
)
3281 /* If there is no version string, we can just return out. */
3285 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
3289 /* Look for the version. If we find it, it is no longer weak. */
3290 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
3292 if (strcmp (t
->name
, p
) == 0)
3296 struct bfd_elf_version_expr
*d
;
3298 len
= p
- h
->root
.root
.string
;
3299 alc
= bfd_alloc (sinfo
->output_bfd
, len
);
3302 strncpy (alc
, h
->root
.root
.string
, len
- 1);
3303 alc
[len
- 1] = '\0';
3304 if (alc
[len
- 2] == ELF_VER_CHR
)
3305 alc
[len
- 2] = '\0';
3307 h
->verinfo
.vertree
= t
;
3311 if (t
->globals
!= NULL
)
3313 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3315 if ((d
->match
[0] == '*' && d
->match
[1] == '\0')
3316 || fnmatch (d
->match
, alc
, 0) == 0)
3321 /* See if there is anything to force this symbol to
3323 if (d
== NULL
&& t
->locals
!= NULL
)
3325 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
3327 if ((d
->match
[0] == '*' && d
->match
[1] == '\0')
3328 || fnmatch (d
->match
, alc
, 0) == 0)
3330 if (h
->dynindx
!= -1
3332 && ! sinfo
->export_dynamic
)
3334 sinfo
->removed_dynamic
= true;
3335 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
3336 h
->elf_link_hash_flags
&=~
3337 ELF_LINK_HASH_NEEDS_PLT
;
3339 h
->plt
.offset
= (bfd_vma
) -1;
3340 /* FIXME: The name of the symbol has
3341 already been recorded in the dynamic
3342 string table section. */
3350 bfd_release (sinfo
->output_bfd
, alc
);
3355 /* If we are building an application, we need to create a
3356 version node for this version. */
3357 if (t
== NULL
&& ! info
->shared
)
3359 struct bfd_elf_version_tree
**pp
;
3362 /* If we aren't going to export this symbol, we don't need
3363 to worry about it. */
3364 if (h
->dynindx
== -1)
3367 t
= ((struct bfd_elf_version_tree
*)
3368 bfd_alloc (sinfo
->output_bfd
, sizeof *t
));
3371 sinfo
->failed
= true;
3380 t
->name_indx
= (unsigned int) -1;
3384 for (pp
= &sinfo
->verdefs
; *pp
!= NULL
; pp
= &(*pp
)->next
)
3386 t
->vernum
= version_index
;
3390 h
->verinfo
.vertree
= t
;
3394 /* We could not find the version for a symbol when
3395 generating a shared archive. Return an error. */
3396 (*_bfd_error_handler
)
3397 (_("%s: undefined versioned symbol name %s"),
3398 bfd_get_filename (sinfo
->output_bfd
), h
->root
.root
.string
);
3399 bfd_set_error (bfd_error_bad_value
);
3400 sinfo
->failed
= true;
3405 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
3408 /* If we don't have a version for this symbol, see if we can find
3410 if (h
->verinfo
.vertree
== NULL
&& sinfo
->verdefs
!= NULL
)
3412 struct bfd_elf_version_tree
*t
;
3413 struct bfd_elf_version_tree
*deflt
;
3414 struct bfd_elf_version_expr
*d
;
3416 /* See if can find what version this symbol is in. If the
3417 symbol is supposed to be local, then don't actually register
3420 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
3422 if (t
->globals
!= NULL
)
3424 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3426 if (fnmatch (d
->match
, h
->root
.root
.string
, 0) == 0)
3428 h
->verinfo
.vertree
= t
;
3437 if (t
->locals
!= NULL
)
3439 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
3441 if (d
->match
[0] == '*' && d
->match
[1] == '\0')
3443 else if (fnmatch (d
->match
, h
->root
.root
.string
, 0) == 0)
3445 h
->verinfo
.vertree
= t
;
3446 if (h
->dynindx
!= -1
3448 && ! sinfo
->export_dynamic
)
3450 sinfo
->removed_dynamic
= true;
3451 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
3452 h
->elf_link_hash_flags
&=~ ELF_LINK_HASH_NEEDS_PLT
;
3454 h
->plt
.offset
= (bfd_vma
) -1;
3455 /* FIXME: The name of the symbol has already
3456 been recorded in the dynamic string table
3468 if (deflt
!= NULL
&& h
->verinfo
.vertree
== NULL
)
3470 h
->verinfo
.vertree
= deflt
;
3471 if (h
->dynindx
!= -1
3473 && ! sinfo
->export_dynamic
)
3475 sinfo
->removed_dynamic
= true;
3476 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
3477 h
->elf_link_hash_flags
&=~ ELF_LINK_HASH_NEEDS_PLT
;
3479 h
->plt
.offset
= (bfd_vma
) -1;
3480 /* FIXME: The name of the symbol has already been
3481 recorded in the dynamic string table section. */
3489 /* This function is used to renumber the dynamic symbols, if some of
3490 them are removed because they are marked as local. This is called
3491 via elf_link_hash_traverse. */
3494 elf_link_renumber_dynsyms (h
, data
)
3495 struct elf_link_hash_entry
*h
;
3498 struct bfd_link_info
*info
= (struct bfd_link_info
*) data
;
3500 if (h
->dynindx
!= -1)
3502 h
->dynindx
= elf_hash_table (info
)->dynsymcount
;
3503 ++elf_hash_table (info
)->dynsymcount
;
3509 /* Final phase of ELF linker. */
3511 /* A structure we use to avoid passing large numbers of arguments. */
3513 struct elf_final_link_info
3515 /* General link information. */
3516 struct bfd_link_info
*info
;
3519 /* Symbol string table. */
3520 struct bfd_strtab_hash
*symstrtab
;
3521 /* .dynsym section. */
3522 asection
*dynsym_sec
;
3523 /* .hash section. */
3525 /* symbol version section (.gnu.version). */
3526 asection
*symver_sec
;
3527 /* Buffer large enough to hold contents of any section. */
3529 /* Buffer large enough to hold external relocs of any section. */
3530 PTR external_relocs
;
3531 /* Buffer large enough to hold internal relocs of any section. */
3532 Elf_Internal_Rela
*internal_relocs
;
3533 /* Buffer large enough to hold external local symbols of any input
3535 Elf_External_Sym
*external_syms
;
3536 /* Buffer large enough to hold internal local symbols of any input
3538 Elf_Internal_Sym
*internal_syms
;
3539 /* Array large enough to hold a symbol index for each local symbol
3540 of any input BFD. */
3542 /* Array large enough to hold a section pointer for each local
3543 symbol of any input BFD. */
3544 asection
**sections
;
3545 /* Buffer to hold swapped out symbols. */
3546 Elf_External_Sym
*symbuf
;
3547 /* Number of swapped out symbols in buffer. */
3548 size_t symbuf_count
;
3549 /* Number of symbols which fit in symbuf. */
3553 static boolean elf_link_output_sym
3554 PARAMS ((struct elf_final_link_info
*, const char *,
3555 Elf_Internal_Sym
*, asection
*));
3556 static boolean elf_link_flush_output_syms
3557 PARAMS ((struct elf_final_link_info
*));
3558 static boolean elf_link_output_extsym
3559 PARAMS ((struct elf_link_hash_entry
*, PTR
));
3560 static boolean elf_link_input_bfd
3561 PARAMS ((struct elf_final_link_info
*, bfd
*));
3562 static boolean elf_reloc_link_order
3563 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
3564 struct bfd_link_order
*));
3566 /* This struct is used to pass information to elf_link_output_extsym. */
3568 struct elf_outext_info
3572 struct elf_final_link_info
*finfo
;
3575 /* Do the final step of an ELF link. */
3578 elf_bfd_final_link (abfd
, info
)
3580 struct bfd_link_info
*info
;
3584 struct elf_final_link_info finfo
;
3585 register asection
*o
;
3586 register struct bfd_link_order
*p
;
3588 size_t max_contents_size
;
3589 size_t max_external_reloc_size
;
3590 size_t max_internal_reloc_count
;
3591 size_t max_sym_count
;
3593 Elf_Internal_Sym elfsym
;
3595 Elf_Internal_Shdr
*symtab_hdr
;
3596 Elf_Internal_Shdr
*symstrtab_hdr
;
3597 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3598 struct elf_outext_info eoinfo
;
3601 abfd
->flags
|= DYNAMIC
;
3603 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
3604 dynobj
= elf_hash_table (info
)->dynobj
;
3607 finfo
.output_bfd
= abfd
;
3608 finfo
.symstrtab
= elf_stringtab_init ();
3609 if (finfo
.symstrtab
== NULL
)
3614 finfo
.dynsym_sec
= NULL
;
3615 finfo
.hash_sec
= NULL
;
3616 finfo
.symver_sec
= NULL
;
3620 finfo
.dynsym_sec
= bfd_get_section_by_name (dynobj
, ".dynsym");
3621 finfo
.hash_sec
= bfd_get_section_by_name (dynobj
, ".hash");
3622 BFD_ASSERT (finfo
.dynsym_sec
!= NULL
&& finfo
.hash_sec
!= NULL
);
3623 finfo
.symver_sec
= bfd_get_section_by_name (dynobj
, ".gnu.version");
3624 /* Note that it is OK if symver_sec is NULL. */
3627 finfo
.contents
= NULL
;
3628 finfo
.external_relocs
= NULL
;
3629 finfo
.internal_relocs
= NULL
;
3630 finfo
.external_syms
= NULL
;
3631 finfo
.internal_syms
= NULL
;
3632 finfo
.indices
= NULL
;
3633 finfo
.sections
= NULL
;
3634 finfo
.symbuf
= NULL
;
3635 finfo
.symbuf_count
= 0;
3637 /* Count up the number of relocations we will output for each output
3638 section, so that we know the sizes of the reloc sections. We
3639 also figure out some maximum sizes. */
3640 max_contents_size
= 0;
3641 max_external_reloc_size
= 0;
3642 max_internal_reloc_count
= 0;
3644 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
3648 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
3650 if (p
->type
== bfd_section_reloc_link_order
3651 || p
->type
== bfd_symbol_reloc_link_order
)
3653 else if (p
->type
== bfd_indirect_link_order
)
3657 sec
= p
->u
.indirect
.section
;
3659 /* Mark all sections which are to be included in the
3660 link. This will normally be every section. We need
3661 to do this so that we can identify any sections which
3662 the linker has decided to not include. */
3663 sec
->linker_mark
= true;
3665 if (info
->relocateable
)
3666 o
->reloc_count
+= sec
->reloc_count
;
3668 if (sec
->_raw_size
> max_contents_size
)
3669 max_contents_size
= sec
->_raw_size
;
3670 if (sec
->_cooked_size
> max_contents_size
)
3671 max_contents_size
= sec
->_cooked_size
;
3673 /* We are interested in just local symbols, not all
3675 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
3676 && (sec
->owner
->flags
& DYNAMIC
) == 0)
3680 if (elf_bad_symtab (sec
->owner
))
3681 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
3682 / sizeof (Elf_External_Sym
));
3684 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
3686 if (sym_count
> max_sym_count
)
3687 max_sym_count
= sym_count
;
3689 if ((sec
->flags
& SEC_RELOC
) != 0)
3693 ext_size
= elf_section_data (sec
)->rel_hdr
.sh_size
;
3694 if (ext_size
> max_external_reloc_size
)
3695 max_external_reloc_size
= ext_size
;
3696 if (sec
->reloc_count
> max_internal_reloc_count
)
3697 max_internal_reloc_count
= sec
->reloc_count
;
3703 if (o
->reloc_count
> 0)
3704 o
->flags
|= SEC_RELOC
;
3707 /* Explicitly clear the SEC_RELOC flag. The linker tends to
3708 set it (this is probably a bug) and if it is set
3709 assign_section_numbers will create a reloc section. */
3710 o
->flags
&=~ SEC_RELOC
;
3713 /* If the SEC_ALLOC flag is not set, force the section VMA to
3714 zero. This is done in elf_fake_sections as well, but forcing
3715 the VMA to 0 here will ensure that relocs against these
3716 sections are handled correctly. */
3717 if ((o
->flags
& SEC_ALLOC
) == 0
3718 && ! o
->user_set_vma
)
3722 /* Figure out the file positions for everything but the symbol table
3723 and the relocs. We set symcount to force assign_section_numbers
3724 to create a symbol table. */
3725 abfd
->symcount
= info
->strip
== strip_all
? 0 : 1;
3726 BFD_ASSERT (! abfd
->output_has_begun
);
3727 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
3730 /* That created the reloc sections. Set their sizes, and assign
3731 them file positions, and allocate some buffers. */
3732 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3734 if ((o
->flags
& SEC_RELOC
) != 0)
3736 Elf_Internal_Shdr
*rel_hdr
;
3737 register struct elf_link_hash_entry
**p
, **pend
;
3739 rel_hdr
= &elf_section_data (o
)->rel_hdr
;
3741 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* o
->reloc_count
;
3743 /* The contents field must last into write_object_contents,
3744 so we allocate it with bfd_alloc rather than malloc. */
3745 rel_hdr
->contents
= (PTR
) bfd_alloc (abfd
, rel_hdr
->sh_size
);
3746 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
3749 p
= ((struct elf_link_hash_entry
**)
3750 bfd_malloc (o
->reloc_count
3751 * sizeof (struct elf_link_hash_entry
*)));
3752 if (p
== NULL
&& o
->reloc_count
!= 0)
3754 elf_section_data (o
)->rel_hashes
= p
;
3755 pend
= p
+ o
->reloc_count
;
3756 for (; p
< pend
; p
++)
3759 /* Use the reloc_count field as an index when outputting the
3765 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3767 /* We have now assigned file positions for all the sections except
3768 .symtab and .strtab. We start the .symtab section at the current
3769 file position, and write directly to it. We build the .strtab
3770 section in memory. */
3772 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3773 /* sh_name is set in prep_headers. */
3774 symtab_hdr
->sh_type
= SHT_SYMTAB
;
3775 symtab_hdr
->sh_flags
= 0;
3776 symtab_hdr
->sh_addr
= 0;
3777 symtab_hdr
->sh_size
= 0;
3778 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
3779 /* sh_link is set in assign_section_numbers. */
3780 /* sh_info is set below. */
3781 /* sh_offset is set just below. */
3782 symtab_hdr
->sh_addralign
= 4; /* FIXME: system dependent? */
3784 off
= elf_tdata (abfd
)->next_file_pos
;
3785 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, true);
3787 /* Note that at this point elf_tdata (abfd)->next_file_pos is
3788 incorrect. We do not yet know the size of the .symtab section.
3789 We correct next_file_pos below, after we do know the size. */
3791 /* Allocate a buffer to hold swapped out symbols. This is to avoid
3792 continuously seeking to the right position in the file. */
3793 if (! info
->keep_memory
|| max_sym_count
< 20)
3794 finfo
.symbuf_size
= 20;
3796 finfo
.symbuf_size
= max_sym_count
;
3797 finfo
.symbuf
= ((Elf_External_Sym
*)
3798 bfd_malloc (finfo
.symbuf_size
* sizeof (Elf_External_Sym
)));
3799 if (finfo
.symbuf
== NULL
)
3802 /* Start writing out the symbol table. The first symbol is always a
3804 if (info
->strip
!= strip_all
|| info
->relocateable
)
3806 elfsym
.st_value
= 0;
3809 elfsym
.st_other
= 0;
3810 elfsym
.st_shndx
= SHN_UNDEF
;
3811 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
3812 &elfsym
, bfd_und_section_ptr
))
3817 /* Some standard ELF linkers do this, but we don't because it causes
3818 bootstrap comparison failures. */
3819 /* Output a file symbol for the output file as the second symbol.
3820 We output this even if we are discarding local symbols, although
3821 I'm not sure if this is correct. */
3822 elfsym
.st_value
= 0;
3824 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
3825 elfsym
.st_other
= 0;
3826 elfsym
.st_shndx
= SHN_ABS
;
3827 if (! elf_link_output_sym (&finfo
, bfd_get_filename (abfd
),
3828 &elfsym
, bfd_abs_section_ptr
))
3832 /* Output a symbol for each section. We output these even if we are
3833 discarding local symbols, since they are used for relocs. These
3834 symbols have no names. We store the index of each one in the
3835 index field of the section, so that we can find it again when
3836 outputting relocs. */
3837 if (info
->strip
!= strip_all
|| info
->relocateable
)
3840 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
3841 elfsym
.st_other
= 0;
3842 for (i
= 1; i
< elf_elfheader (abfd
)->e_shnum
; i
++)
3844 o
= section_from_elf_index (abfd
, i
);
3846 o
->target_index
= abfd
->symcount
;
3847 elfsym
.st_shndx
= i
;
3848 if (info
->relocateable
|| o
== NULL
)
3849 elfsym
.st_value
= 0;
3851 elfsym
.st_value
= o
->vma
;
3852 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
3858 /* Allocate some memory to hold information read in from the input
3860 finfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
3861 finfo
.external_relocs
= (PTR
) bfd_malloc (max_external_reloc_size
);
3862 finfo
.internal_relocs
= ((Elf_Internal_Rela
*)
3863 bfd_malloc (max_internal_reloc_count
3864 * sizeof (Elf_Internal_Rela
)));
3865 finfo
.external_syms
= ((Elf_External_Sym
*)
3866 bfd_malloc (max_sym_count
3867 * sizeof (Elf_External_Sym
)));
3868 finfo
.internal_syms
= ((Elf_Internal_Sym
*)
3869 bfd_malloc (max_sym_count
3870 * sizeof (Elf_Internal_Sym
)));
3871 finfo
.indices
= (long *) bfd_malloc (max_sym_count
* sizeof (long));
3872 finfo
.sections
= ((asection
**)
3873 bfd_malloc (max_sym_count
* sizeof (asection
*)));
3874 if ((finfo
.contents
== NULL
&& max_contents_size
!= 0)
3875 || (finfo
.external_relocs
== NULL
&& max_external_reloc_size
!= 0)
3876 || (finfo
.internal_relocs
== NULL
&& max_internal_reloc_count
!= 0)
3877 || (finfo
.external_syms
== NULL
&& max_sym_count
!= 0)
3878 || (finfo
.internal_syms
== NULL
&& max_sym_count
!= 0)
3879 || (finfo
.indices
== NULL
&& max_sym_count
!= 0)
3880 || (finfo
.sections
== NULL
&& max_sym_count
!= 0))
3883 /* Since ELF permits relocations to be against local symbols, we
3884 must have the local symbols available when we do the relocations.
3885 Since we would rather only read the local symbols once, and we
3886 would rather not keep them in memory, we handle all the
3887 relocations for a single input file at the same time.
3889 Unfortunately, there is no way to know the total number of local
3890 symbols until we have seen all of them, and the local symbol
3891 indices precede the global symbol indices. This means that when
3892 we are generating relocateable output, and we see a reloc against
3893 a global symbol, we can not know the symbol index until we have
3894 finished examining all the local symbols to see which ones we are
3895 going to output. To deal with this, we keep the relocations in
3896 memory, and don't output them until the end of the link. This is
3897 an unfortunate waste of memory, but I don't see a good way around
3898 it. Fortunately, it only happens when performing a relocateable
3899 link, which is not the common case. FIXME: If keep_memory is set
3900 we could write the relocs out and then read them again; I don't
3901 know how bad the memory loss will be. */
3903 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
3904 sub
->output_has_begun
= false;
3905 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3907 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
3909 if (p
->type
== bfd_indirect_link_order
3910 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
3911 == bfd_target_elf_flavour
))
3913 sub
= p
->u
.indirect
.section
->owner
;
3914 if (! sub
->output_has_begun
)
3916 if (! elf_link_input_bfd (&finfo
, sub
))
3918 sub
->output_has_begun
= true;
3921 else if (p
->type
== bfd_section_reloc_link_order
3922 || p
->type
== bfd_symbol_reloc_link_order
)
3924 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
3929 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
3935 /* That wrote out all the local symbols. Finish up the symbol table
3936 with the global symbols. */
3938 if (info
->strip
!= strip_all
&& info
->shared
)
3940 /* Output any global symbols that got converted to local in a
3941 version script. We do this in a separate step since ELF
3942 requires all local symbols to appear prior to any global
3943 symbols. FIXME: We should only do this if some global
3944 symbols were, in fact, converted to become local. FIXME:
3945 Will this work correctly with the Irix 5 linker? */
3946 eoinfo
.failed
= false;
3947 eoinfo
.finfo
= &finfo
;
3948 eoinfo
.localsyms
= true;
3949 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
3955 /* The sh_info field records the index of the first non local
3957 symtab_hdr
->sh_info
= abfd
->symcount
;
3959 elf_section_data (finfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
= 1;
3961 /* We get the global symbols from the hash table. */
3962 eoinfo
.failed
= false;
3963 eoinfo
.localsyms
= false;
3964 eoinfo
.finfo
= &finfo
;
3965 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
3970 /* Flush all symbols to the file. */
3971 if (! elf_link_flush_output_syms (&finfo
))
3974 /* Now we know the size of the symtab section. */
3975 off
+= symtab_hdr
->sh_size
;
3977 /* Finish up and write out the symbol string table (.strtab)
3979 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3980 /* sh_name was set in prep_headers. */
3981 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
3982 symstrtab_hdr
->sh_flags
= 0;
3983 symstrtab_hdr
->sh_addr
= 0;
3984 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (finfo
.symstrtab
);
3985 symstrtab_hdr
->sh_entsize
= 0;
3986 symstrtab_hdr
->sh_link
= 0;
3987 symstrtab_hdr
->sh_info
= 0;
3988 /* sh_offset is set just below. */
3989 symstrtab_hdr
->sh_addralign
= 1;
3991 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, true);
3992 elf_tdata (abfd
)->next_file_pos
= off
;
3994 if (abfd
->symcount
> 0)
3996 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
3997 || ! _bfd_stringtab_emit (abfd
, finfo
.symstrtab
))
4001 /* Adjust the relocs to have the correct symbol indices. */
4002 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4004 struct elf_link_hash_entry
**rel_hash
;
4005 Elf_Internal_Shdr
*rel_hdr
;
4007 if ((o
->flags
& SEC_RELOC
) == 0)
4010 rel_hash
= elf_section_data (o
)->rel_hashes
;
4011 rel_hdr
= &elf_section_data (o
)->rel_hdr
;
4012 for (i
= 0; i
< o
->reloc_count
; i
++, rel_hash
++)
4014 if (*rel_hash
== NULL
)
4017 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
4019 if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
4021 Elf_External_Rel
*erel
;
4022 Elf_Internal_Rel irel
;
4024 erel
= (Elf_External_Rel
*) rel_hdr
->contents
+ i
;
4025 elf_swap_reloc_in (abfd
, erel
, &irel
);
4026 irel
.r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
4027 ELF_R_TYPE (irel
.r_info
));
4028 elf_swap_reloc_out (abfd
, &irel
, erel
);
4032 Elf_External_Rela
*erela
;
4033 Elf_Internal_Rela irela
;
4035 BFD_ASSERT (rel_hdr
->sh_entsize
4036 == sizeof (Elf_External_Rela
));
4038 erela
= (Elf_External_Rela
*) rel_hdr
->contents
+ i
;
4039 elf_swap_reloca_in (abfd
, erela
, &irela
);
4040 irela
.r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
4041 ELF_R_TYPE (irela
.r_info
));
4042 elf_swap_reloca_out (abfd
, &irela
, erela
);
4046 /* Set the reloc_count field to 0 to prevent write_relocs from
4047 trying to swap the relocs out itself. */
4051 /* If we are linking against a dynamic object, or generating a
4052 shared library, finish up the dynamic linking information. */
4055 Elf_External_Dyn
*dyncon
, *dynconend
;
4057 /* Fix up .dynamic entries. */
4058 o
= bfd_get_section_by_name (dynobj
, ".dynamic");
4059 BFD_ASSERT (o
!= NULL
);
4061 dyncon
= (Elf_External_Dyn
*) o
->contents
;
4062 dynconend
= (Elf_External_Dyn
*) (o
->contents
+ o
->_raw_size
);
4063 for (; dyncon
< dynconend
; dyncon
++)
4065 Elf_Internal_Dyn dyn
;
4069 elf_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4076 /* SVR4 linkers seem to set DT_INIT and DT_FINI based on
4077 magic _init and _fini symbols. This is pretty ugly,
4078 but we are compatible. */
4086 struct elf_link_hash_entry
*h
;
4088 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
4089 false, false, true);
4091 && (h
->root
.type
== bfd_link_hash_defined
4092 || h
->root
.type
== bfd_link_hash_defweak
))
4094 dyn
.d_un
.d_val
= h
->root
.u
.def
.value
;
4095 o
= h
->root
.u
.def
.section
;
4096 if (o
->output_section
!= NULL
)
4097 dyn
.d_un
.d_val
+= (o
->output_section
->vma
4098 + o
->output_offset
);
4101 /* The symbol is imported from another shared
4102 library and does not apply to this one. */
4106 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
4121 name
= ".gnu.version_d";
4124 name
= ".gnu.version_r";
4127 name
= ".gnu.version";
4129 o
= bfd_get_section_by_name (abfd
, name
);
4130 BFD_ASSERT (o
!= NULL
);
4131 dyn
.d_un
.d_ptr
= o
->vma
;
4132 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
4139 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
4144 for (i
= 1; i
< elf_elfheader (abfd
)->e_shnum
; i
++)
4146 Elf_Internal_Shdr
*hdr
;
4148 hdr
= elf_elfsections (abfd
)[i
];
4149 if (hdr
->sh_type
== type
4150 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
4152 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
4153 dyn
.d_un
.d_val
+= hdr
->sh_size
;
4156 if (dyn
.d_un
.d_val
== 0
4157 || hdr
->sh_addr
< dyn
.d_un
.d_val
)
4158 dyn
.d_un
.d_val
= hdr
->sh_addr
;
4162 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
4168 /* If we have created any dynamic sections, then output them. */
4171 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
4174 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4176 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4177 || o
->_raw_size
== 0)
4179 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
4181 /* At this point, we are only interested in sections
4182 created by elf_link_create_dynamic_sections. */
4185 if ((elf_section_data (o
->output_section
)->this_hdr
.sh_type
4187 || strcmp (bfd_get_section_name (abfd
, o
), ".dynstr") != 0)
4189 if (! bfd_set_section_contents (abfd
, o
->output_section
,
4190 o
->contents
, o
->output_offset
,
4198 /* The contents of the .dynstr section are actually in a
4200 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
4201 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
4202 || ! _bfd_stringtab_emit (abfd
,
4203 elf_hash_table (info
)->dynstr
))
4209 /* If we have optimized stabs strings, output them. */
4210 if (elf_hash_table (info
)->stab_info
!= NULL
)
4212 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
4216 if (finfo
.symstrtab
!= NULL
)
4217 _bfd_stringtab_free (finfo
.symstrtab
);
4218 if (finfo
.contents
!= NULL
)
4219 free (finfo
.contents
);
4220 if (finfo
.external_relocs
!= NULL
)
4221 free (finfo
.external_relocs
);
4222 if (finfo
.internal_relocs
!= NULL
)
4223 free (finfo
.internal_relocs
);
4224 if (finfo
.external_syms
!= NULL
)
4225 free (finfo
.external_syms
);
4226 if (finfo
.internal_syms
!= NULL
)
4227 free (finfo
.internal_syms
);
4228 if (finfo
.indices
!= NULL
)
4229 free (finfo
.indices
);
4230 if (finfo
.sections
!= NULL
)
4231 free (finfo
.sections
);
4232 if (finfo
.symbuf
!= NULL
)
4233 free (finfo
.symbuf
);
4234 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4236 if ((o
->flags
& SEC_RELOC
) != 0
4237 && elf_section_data (o
)->rel_hashes
!= NULL
)
4238 free (elf_section_data (o
)->rel_hashes
);
4241 elf_tdata (abfd
)->linker
= true;
4246 if (finfo
.symstrtab
!= NULL
)
4247 _bfd_stringtab_free (finfo
.symstrtab
);
4248 if (finfo
.contents
!= NULL
)
4249 free (finfo
.contents
);
4250 if (finfo
.external_relocs
!= NULL
)
4251 free (finfo
.external_relocs
);
4252 if (finfo
.internal_relocs
!= NULL
)
4253 free (finfo
.internal_relocs
);
4254 if (finfo
.external_syms
!= NULL
)
4255 free (finfo
.external_syms
);
4256 if (finfo
.internal_syms
!= NULL
)
4257 free (finfo
.internal_syms
);
4258 if (finfo
.indices
!= NULL
)
4259 free (finfo
.indices
);
4260 if (finfo
.sections
!= NULL
)
4261 free (finfo
.sections
);
4262 if (finfo
.symbuf
!= NULL
)
4263 free (finfo
.symbuf
);
4264 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4266 if ((o
->flags
& SEC_RELOC
) != 0
4267 && elf_section_data (o
)->rel_hashes
!= NULL
)
4268 free (elf_section_data (o
)->rel_hashes
);
4274 /* Add a symbol to the output symbol table. */
4277 elf_link_output_sym (finfo
, name
, elfsym
, input_sec
)
4278 struct elf_final_link_info
*finfo
;
4280 Elf_Internal_Sym
*elfsym
;
4281 asection
*input_sec
;
4283 boolean (*output_symbol_hook
) PARAMS ((bfd
*,
4284 struct bfd_link_info
*info
,
4289 output_symbol_hook
= get_elf_backend_data (finfo
->output_bfd
)->
4290 elf_backend_link_output_symbol_hook
;
4291 if (output_symbol_hook
!= NULL
)
4293 if (! ((*output_symbol_hook
)
4294 (finfo
->output_bfd
, finfo
->info
, name
, elfsym
, input_sec
)))
4298 if (name
== (const char *) NULL
|| *name
== '\0')
4299 elfsym
->st_name
= 0;
4302 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (finfo
->symstrtab
,
4305 if (elfsym
->st_name
== (unsigned long) -1)
4309 if (finfo
->symbuf_count
>= finfo
->symbuf_size
)
4311 if (! elf_link_flush_output_syms (finfo
))
4315 elf_swap_symbol_out (finfo
->output_bfd
, elfsym
,
4316 (PTR
) (finfo
->symbuf
+ finfo
->symbuf_count
));
4317 ++finfo
->symbuf_count
;
4319 ++finfo
->output_bfd
->symcount
;
4324 /* Flush the output symbols to the file. */
4327 elf_link_flush_output_syms (finfo
)
4328 struct elf_final_link_info
*finfo
;
4330 if (finfo
->symbuf_count
> 0)
4332 Elf_Internal_Shdr
*symtab
;
4334 symtab
= &elf_tdata (finfo
->output_bfd
)->symtab_hdr
;
4336 if (bfd_seek (finfo
->output_bfd
, symtab
->sh_offset
+ symtab
->sh_size
,
4338 || (bfd_write ((PTR
) finfo
->symbuf
, finfo
->symbuf_count
,
4339 sizeof (Elf_External_Sym
), finfo
->output_bfd
)
4340 != finfo
->symbuf_count
* sizeof (Elf_External_Sym
)))
4343 symtab
->sh_size
+= finfo
->symbuf_count
* sizeof (Elf_External_Sym
);
4345 finfo
->symbuf_count
= 0;
4351 /* Add an external symbol to the symbol table. This is called from
4352 the hash table traversal routine. When generating a shared object,
4353 we go through the symbol table twice. The first time we output
4354 anything that might have been forced to local scope in a version
4355 script. The second time we output the symbols that are still
4359 elf_link_output_extsym (h
, data
)
4360 struct elf_link_hash_entry
*h
;
4363 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
4364 struct elf_final_link_info
*finfo
= eoinfo
->finfo
;
4366 Elf_Internal_Sym sym
;
4367 asection
*input_sec
;
4369 /* Decide whether to output this symbol in this pass. */
4370 if (eoinfo
->localsyms
)
4372 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
4377 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
4381 /* If we are not creating a shared library, and this symbol is
4382 referenced by a shared library but is not defined anywhere, then
4383 warn that it is undefined. If we do not do this, the runtime
4384 linker will complain that the symbol is undefined when the
4385 program is run. We don't have to worry about symbols that are
4386 referenced by regular files, because we will already have issued
4387 warnings for them. */
4388 if (! finfo
->info
->relocateable
4389 && ! finfo
->info
->shared
4390 && h
->root
.type
== bfd_link_hash_undefined
4391 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0
4392 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0)
4394 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
4395 (finfo
->info
, h
->root
.root
.string
, h
->root
.u
.undef
.abfd
,
4396 (asection
*) NULL
, 0)))
4398 eoinfo
->failed
= true;
4403 /* We don't want to output symbols that have never been mentioned by
4404 a regular file, or that we have been told to strip. However, if
4405 h->indx is set to -2, the symbol is used by a reloc and we must
4409 else if (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
4410 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0)
4411 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
4412 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0)
4414 else if (finfo
->info
->strip
== strip_all
4415 || (finfo
->info
->strip
== strip_some
4416 && bfd_hash_lookup (finfo
->info
->keep_hash
,
4417 h
->root
.root
.string
,
4418 false, false) == NULL
))
4423 /* If we're stripping it, and it's not a dynamic symbol, there's
4424 nothing else to do. */
4425 if (strip
&& h
->dynindx
== -1)
4429 sym
.st_size
= h
->size
;
4430 sym
.st_other
= h
->other
;
4431 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
4432 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
4433 else if (h
->root
.type
== bfd_link_hash_undefweak
4434 || h
->root
.type
== bfd_link_hash_defweak
)
4435 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
4437 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
4439 switch (h
->root
.type
)
4442 case bfd_link_hash_new
:
4446 case bfd_link_hash_undefined
:
4447 input_sec
= bfd_und_section_ptr
;
4448 sym
.st_shndx
= SHN_UNDEF
;
4451 case bfd_link_hash_undefweak
:
4452 input_sec
= bfd_und_section_ptr
;
4453 sym
.st_shndx
= SHN_UNDEF
;
4456 case bfd_link_hash_defined
:
4457 case bfd_link_hash_defweak
:
4459 input_sec
= h
->root
.u
.def
.section
;
4460 if (input_sec
->output_section
!= NULL
)
4463 _bfd_elf_section_from_bfd_section (finfo
->output_bfd
,
4464 input_sec
->output_section
);
4465 if (sym
.st_shndx
== (unsigned short) -1)
4467 (*_bfd_error_handler
)
4468 (_("%s: could not find output section %s for input section %s"),
4469 bfd_get_filename (finfo
->output_bfd
),
4470 input_sec
->output_section
->name
,
4472 eoinfo
->failed
= true;
4476 /* ELF symbols in relocateable files are section relative,
4477 but in nonrelocateable files they are virtual
4479 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
4480 if (! finfo
->info
->relocateable
)
4481 sym
.st_value
+= input_sec
->output_section
->vma
;
4485 BFD_ASSERT (input_sec
->owner
== NULL
4486 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
4487 sym
.st_shndx
= SHN_UNDEF
;
4488 input_sec
= bfd_und_section_ptr
;
4493 case bfd_link_hash_common
:
4494 input_sec
= h
->root
.u
.c
.p
->section
;
4495 sym
.st_shndx
= SHN_COMMON
;
4496 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
4499 case bfd_link_hash_indirect
:
4500 /* These symbols are created by symbol versioning. They point
4501 to the decorated version of the name. For example, if the
4502 symbol foo@@GNU_1.2 is the default, which should be used when
4503 foo is used with no version, then we add an indirect symbol
4504 foo which points to foo@@GNU_1.2. We ignore these symbols,
4505 since the indirected symbol is already in the hash table. If
4506 the indirect symbol is non-ELF, fall through and output it. */
4507 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_ELF
) == 0)
4511 case bfd_link_hash_warning
:
4512 /* We can't represent these symbols in ELF, although a warning
4513 symbol may have come from a .gnu.warning.SYMBOL section. We
4514 just put the target symbol in the hash table. If the target
4515 symbol does not really exist, don't do anything. */
4516 if (h
->root
.u
.i
.link
->type
== bfd_link_hash_new
)
4518 return (elf_link_output_extsym
4519 ((struct elf_link_hash_entry
*) h
->root
.u
.i
.link
, data
));
4522 /* Give the processor backend a chance to tweak the symbol value,
4523 and also to finish up anything that needs to be done for this
4525 if ((h
->dynindx
!= -1
4526 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
4527 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
4529 struct elf_backend_data
*bed
;
4531 bed
= get_elf_backend_data (finfo
->output_bfd
);
4532 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
4533 (finfo
->output_bfd
, finfo
->info
, h
, &sym
)))
4535 eoinfo
->failed
= true;
4540 /* If this symbol should be put in the .dynsym section, then put it
4541 there now. We have already know the symbol index. We also fill
4542 in the entry in the .hash section. */
4543 if (h
->dynindx
!= -1
4544 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
4548 bfd_byte
*bucketpos
;
4551 sym
.st_name
= h
->dynstr_index
;
4553 elf_swap_symbol_out (finfo
->output_bfd
, &sym
,
4554 (PTR
) (((Elf_External_Sym
*)
4555 finfo
->dynsym_sec
->contents
)
4558 bucketcount
= elf_hash_table (finfo
->info
)->bucketcount
;
4559 bucket
= h
->elf_hash_value
% bucketcount
;
4560 bucketpos
= ((bfd_byte
*) finfo
->hash_sec
->contents
4561 + (bucket
+ 2) * (ARCH_SIZE
/ 8));
4562 chain
= get_word (finfo
->output_bfd
, bucketpos
);
4563 put_word (finfo
->output_bfd
, h
->dynindx
, bucketpos
);
4564 put_word (finfo
->output_bfd
, chain
,
4565 ((bfd_byte
*) finfo
->hash_sec
->contents
4566 + (bucketcount
+ 2 + h
->dynindx
) * (ARCH_SIZE
/ 8)));
4568 if (finfo
->symver_sec
!= NULL
&& finfo
->symver_sec
->contents
!= NULL
)
4570 Elf_Internal_Versym iversym
;
4572 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
4574 if (h
->verinfo
.verdef
== NULL
)
4575 iversym
.vs_vers
= 0;
4577 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
4581 if (h
->verinfo
.vertree
== NULL
)
4582 iversym
.vs_vers
= 1;
4584 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
4587 if ((h
->elf_link_hash_flags
& ELF_LINK_HIDDEN
) != 0)
4588 iversym
.vs_vers
|= VERSYM_HIDDEN
;
4590 _bfd_elf_swap_versym_out (finfo
->output_bfd
, &iversym
,
4591 (((Elf_External_Versym
*)
4592 finfo
->symver_sec
->contents
)
4597 /* If we're stripping it, then it was just a dynamic symbol, and
4598 there's nothing else to do. */
4602 h
->indx
= finfo
->output_bfd
->symcount
;
4604 if (! elf_link_output_sym (finfo
, h
->root
.root
.string
, &sym
, input_sec
))
4606 eoinfo
->failed
= true;
4613 /* Link an input file into the linker output file. This function
4614 handles all the sections and relocations of the input file at once.
4615 This is so that we only have to read the local symbols once, and
4616 don't have to keep them in memory. */
4619 elf_link_input_bfd (finfo
, input_bfd
)
4620 struct elf_final_link_info
*finfo
;
4623 boolean (*relocate_section
) PARAMS ((bfd
*, struct bfd_link_info
*,
4624 bfd
*, asection
*, bfd_byte
*,
4625 Elf_Internal_Rela
*,
4626 Elf_Internal_Sym
*, asection
**));
4628 Elf_Internal_Shdr
*symtab_hdr
;
4631 Elf_External_Sym
*external_syms
;
4632 Elf_External_Sym
*esym
;
4633 Elf_External_Sym
*esymend
;
4634 Elf_Internal_Sym
*isym
;
4636 asection
**ppsection
;
4639 output_bfd
= finfo
->output_bfd
;
4641 get_elf_backend_data (output_bfd
)->elf_backend_relocate_section
;
4643 /* If this is a dynamic object, we don't want to do anything here:
4644 we don't want the local symbols, and we don't want the section
4646 if ((input_bfd
->flags
& DYNAMIC
) != 0)
4649 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4650 if (elf_bad_symtab (input_bfd
))
4652 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
4657 locsymcount
= symtab_hdr
->sh_info
;
4658 extsymoff
= symtab_hdr
->sh_info
;
4661 /* Read the local symbols. */
4662 if (symtab_hdr
->contents
!= NULL
)
4663 external_syms
= (Elf_External_Sym
*) symtab_hdr
->contents
;
4664 else if (locsymcount
== 0)
4665 external_syms
= NULL
;
4668 external_syms
= finfo
->external_syms
;
4669 if (bfd_seek (input_bfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
4670 || (bfd_read (external_syms
, sizeof (Elf_External_Sym
),
4671 locsymcount
, input_bfd
)
4672 != locsymcount
* sizeof (Elf_External_Sym
)))
4676 /* Swap in the local symbols and write out the ones which we know
4677 are going into the output file. */
4678 esym
= external_syms
;
4679 esymend
= esym
+ locsymcount
;
4680 isym
= finfo
->internal_syms
;
4681 pindex
= finfo
->indices
;
4682 ppsection
= finfo
->sections
;
4683 for (; esym
< esymend
; esym
++, isym
++, pindex
++, ppsection
++)
4687 Elf_Internal_Sym osym
;
4689 elf_swap_symbol_in (input_bfd
, esym
, isym
);
4692 if (elf_bad_symtab (input_bfd
))
4694 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
4701 if (isym
->st_shndx
== SHN_UNDEF
)
4702 isec
= bfd_und_section_ptr
;
4703 else if (isym
->st_shndx
> 0 && isym
->st_shndx
< SHN_LORESERVE
)
4704 isec
= section_from_elf_index (input_bfd
, isym
->st_shndx
);
4705 else if (isym
->st_shndx
== SHN_ABS
)
4706 isec
= bfd_abs_section_ptr
;
4707 else if (isym
->st_shndx
== SHN_COMMON
)
4708 isec
= bfd_com_section_ptr
;
4717 /* Don't output the first, undefined, symbol. */
4718 if (esym
== external_syms
)
4721 /* If we are stripping all symbols, we don't want to output this
4723 if (finfo
->info
->strip
== strip_all
)
4726 /* We never output section symbols. Instead, we use the section
4727 symbol of the corresponding section in the output file. */
4728 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
4731 /* If we are discarding all local symbols, we don't want to
4732 output this one. If we are generating a relocateable output
4733 file, then some of the local symbols may be required by
4734 relocs; we output them below as we discover that they are
4736 if (finfo
->info
->discard
== discard_all
)
4739 /* If this symbol is defined in a section which we are
4740 discarding, we don't need to keep it, but note that
4741 linker_mark is only reliable for sections that have contents.
4742 For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
4743 as well as linker_mark. */
4744 if (isym
->st_shndx
> 0
4745 && isym
->st_shndx
< SHN_LORESERVE
4747 && ((! isec
->linker_mark
&& (isec
->flags
& SEC_HAS_CONTENTS
) != 0)
4748 || (! finfo
->info
->relocateable
4749 && (isec
->flags
& SEC_EXCLUDE
) != 0)))
4752 /* Get the name of the symbol. */
4753 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
4758 /* See if we are discarding symbols with this name. */
4759 if ((finfo
->info
->strip
== strip_some
4760 && (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false, false)
4762 || (finfo
->info
->discard
== discard_l
4763 && bfd_is_local_label_name (input_bfd
, name
)))
4766 /* If we get here, we are going to output this symbol. */
4770 /* Adjust the section index for the output file. */
4771 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
4772 isec
->output_section
);
4773 if (osym
.st_shndx
== (unsigned short) -1)
4776 *pindex
= output_bfd
->symcount
;
4778 /* ELF symbols in relocateable files are section relative, but
4779 in executable files they are virtual addresses. Note that
4780 this code assumes that all ELF sections have an associated
4781 BFD section with a reasonable value for output_offset; below
4782 we assume that they also have a reasonable value for
4783 output_section. Any special sections must be set up to meet
4784 these requirements. */
4785 osym
.st_value
+= isec
->output_offset
;
4786 if (! finfo
->info
->relocateable
)
4787 osym
.st_value
+= isec
->output_section
->vma
;
4789 if (! elf_link_output_sym (finfo
, name
, &osym
, isec
))
4793 /* Relocate the contents of each section. */
4794 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4798 if (! o
->linker_mark
)
4800 /* This section was omitted from the link. */
4804 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4805 || (o
->_raw_size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
4808 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
4810 /* Section was created by elf_link_create_dynamic_sections
4815 /* Get the contents of the section. They have been cached by a
4816 relaxation routine. Note that o is a section in an input
4817 file, so the contents field will not have been set by any of
4818 the routines which work on output files. */
4819 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
4820 contents
= elf_section_data (o
)->this_hdr
.contents
;
4823 contents
= finfo
->contents
;
4824 if (! bfd_get_section_contents (input_bfd
, o
, contents
,
4825 (file_ptr
) 0, o
->_raw_size
))
4829 if ((o
->flags
& SEC_RELOC
) != 0)
4831 Elf_Internal_Rela
*internal_relocs
;
4833 /* Get the swapped relocs. */
4834 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
4835 (input_bfd
, o
, finfo
->external_relocs
,
4836 finfo
->internal_relocs
, false));
4837 if (internal_relocs
== NULL
4838 && o
->reloc_count
> 0)
4841 /* Relocate the section by invoking a back end routine.
4843 The back end routine is responsible for adjusting the
4844 section contents as necessary, and (if using Rela relocs
4845 and generating a relocateable output file) adjusting the
4846 reloc addend as necessary.
4848 The back end routine does not have to worry about setting
4849 the reloc address or the reloc symbol index.
4851 The back end routine is given a pointer to the swapped in
4852 internal symbols, and can access the hash table entries
4853 for the external symbols via elf_sym_hashes (input_bfd).
4855 When generating relocateable output, the back end routine
4856 must handle STB_LOCAL/STT_SECTION symbols specially. The
4857 output symbol is going to be a section symbol
4858 corresponding to the output section, which will require
4859 the addend to be adjusted. */
4861 if (! (*relocate_section
) (output_bfd
, finfo
->info
,
4862 input_bfd
, o
, contents
,
4864 finfo
->internal_syms
,
4868 if (finfo
->info
->relocateable
)
4870 Elf_Internal_Rela
*irela
;
4871 Elf_Internal_Rela
*irelaend
;
4872 struct elf_link_hash_entry
**rel_hash
;
4873 Elf_Internal_Shdr
*input_rel_hdr
;
4874 Elf_Internal_Shdr
*output_rel_hdr
;
4876 /* Adjust the reloc addresses and symbol indices. */
4878 irela
= internal_relocs
;
4879 irelaend
= irela
+ o
->reloc_count
;
4880 rel_hash
= (elf_section_data (o
->output_section
)->rel_hashes
4881 + o
->output_section
->reloc_count
);
4882 for (; irela
< irelaend
; irela
++, rel_hash
++)
4884 unsigned long r_symndx
;
4885 Elf_Internal_Sym
*isym
;
4888 irela
->r_offset
+= o
->output_offset
;
4890 r_symndx
= ELF_R_SYM (irela
->r_info
);
4895 if (r_symndx
>= locsymcount
4896 || (elf_bad_symtab (input_bfd
)
4897 && finfo
->sections
[r_symndx
] == NULL
))
4899 struct elf_link_hash_entry
*rh
;
4902 /* This is a reloc against a global symbol. We
4903 have not yet output all the local symbols, so
4904 we do not know the symbol index of any global
4905 symbol. We set the rel_hash entry for this
4906 reloc to point to the global hash table entry
4907 for this symbol. The symbol index is then
4908 set at the end of elf_bfd_final_link. */
4909 indx
= r_symndx
- extsymoff
;
4910 rh
= elf_sym_hashes (input_bfd
)[indx
];
4911 while (rh
->root
.type
== bfd_link_hash_indirect
4912 || rh
->root
.type
== bfd_link_hash_warning
)
4913 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
4915 /* Setting the index to -2 tells
4916 elf_link_output_extsym that this symbol is
4918 BFD_ASSERT (rh
->indx
< 0);
4926 /* This is a reloc against a local symbol. */
4929 isym
= finfo
->internal_syms
+ r_symndx
;
4930 sec
= finfo
->sections
[r_symndx
];
4931 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
4933 /* I suppose the backend ought to fill in the
4934 section of any STT_SECTION symbol against a
4935 processor specific section. If we have
4936 discarded a section, the output_section will
4937 be the absolute section. */
4939 && (bfd_is_abs_section (sec
)
4940 || (sec
->output_section
!= NULL
4941 && bfd_is_abs_section (sec
->output_section
))))
4943 else if (sec
== NULL
|| sec
->owner
== NULL
)
4945 bfd_set_error (bfd_error_bad_value
);
4950 r_symndx
= sec
->output_section
->target_index
;
4951 BFD_ASSERT (r_symndx
!= 0);
4956 if (finfo
->indices
[r_symndx
] == -1)
4962 if (finfo
->info
->strip
== strip_all
)
4964 /* You can't do ld -r -s. */
4965 bfd_set_error (bfd_error_invalid_operation
);
4969 /* This symbol was skipped earlier, but
4970 since it is needed by a reloc, we
4971 must output it now. */
4972 link
= symtab_hdr
->sh_link
;
4973 name
= bfd_elf_string_from_elf_section (input_bfd
,
4979 osec
= sec
->output_section
;
4981 _bfd_elf_section_from_bfd_section (output_bfd
,
4983 if (isym
->st_shndx
== (unsigned short) -1)
4986 isym
->st_value
+= sec
->output_offset
;
4987 if (! finfo
->info
->relocateable
)
4988 isym
->st_value
+= osec
->vma
;
4990 finfo
->indices
[r_symndx
] = output_bfd
->symcount
;
4992 if (! elf_link_output_sym (finfo
, name
, isym
, sec
))
4996 r_symndx
= finfo
->indices
[r_symndx
];
4999 irela
->r_info
= ELF_R_INFO (r_symndx
,
5000 ELF_R_TYPE (irela
->r_info
));
5003 /* Swap out the relocs. */
5004 input_rel_hdr
= &elf_section_data (o
)->rel_hdr
;
5005 output_rel_hdr
= &elf_section_data (o
->output_section
)->rel_hdr
;
5006 BFD_ASSERT (output_rel_hdr
->sh_entsize
5007 == input_rel_hdr
->sh_entsize
);
5008 irela
= internal_relocs
;
5009 irelaend
= irela
+ o
->reloc_count
;
5010 if (input_rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
5012 Elf_External_Rel
*erel
;
5014 erel
= ((Elf_External_Rel
*) output_rel_hdr
->contents
5015 + o
->output_section
->reloc_count
);
5016 for (; irela
< irelaend
; irela
++, erel
++)
5018 Elf_Internal_Rel irel
;
5020 irel
.r_offset
= irela
->r_offset
;
5021 irel
.r_info
= irela
->r_info
;
5022 BFD_ASSERT (irela
->r_addend
== 0);
5023 elf_swap_reloc_out (output_bfd
, &irel
, erel
);
5028 Elf_External_Rela
*erela
;
5030 BFD_ASSERT (input_rel_hdr
->sh_entsize
5031 == sizeof (Elf_External_Rela
));
5032 erela
= ((Elf_External_Rela
*) output_rel_hdr
->contents
5033 + o
->output_section
->reloc_count
);
5034 for (; irela
< irelaend
; irela
++, erela
++)
5035 elf_swap_reloca_out (output_bfd
, irela
, erela
);
5038 o
->output_section
->reloc_count
+= o
->reloc_count
;
5042 /* Write out the modified section contents. */
5043 if (elf_section_data (o
)->stab_info
== NULL
)
5045 if (! (o
->flags
& SEC_EXCLUDE
) &&
5046 ! bfd_set_section_contents (output_bfd
, o
->output_section
,
5047 contents
, o
->output_offset
,
5048 (o
->_cooked_size
!= 0
5055 if (! (_bfd_write_section_stabs
5056 (output_bfd
, &elf_hash_table (finfo
->info
)->stab_info
,
5057 o
, &elf_section_data (o
)->stab_info
, contents
)))
5065 /* Generate a reloc when linking an ELF file. This is a reloc
5066 requested by the linker, and does come from any input file. This
5067 is used to build constructor and destructor tables when linking
5071 elf_reloc_link_order (output_bfd
, info
, output_section
, link_order
)
5073 struct bfd_link_info
*info
;
5074 asection
*output_section
;
5075 struct bfd_link_order
*link_order
;
5077 reloc_howto_type
*howto
;
5081 struct elf_link_hash_entry
**rel_hash_ptr
;
5082 Elf_Internal_Shdr
*rel_hdr
;
5084 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
5087 bfd_set_error (bfd_error_bad_value
);
5091 addend
= link_order
->u
.reloc
.p
->addend
;
5093 /* Figure out the symbol index. */
5094 rel_hash_ptr
= (elf_section_data (output_section
)->rel_hashes
5095 + output_section
->reloc_count
);
5096 if (link_order
->type
== bfd_section_reloc_link_order
)
5098 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
5099 BFD_ASSERT (indx
!= 0);
5100 *rel_hash_ptr
= NULL
;
5104 struct elf_link_hash_entry
*h
;
5106 /* Treat a reloc against a defined symbol as though it were
5107 actually against the section. */
5108 h
= ((struct elf_link_hash_entry
*)
5109 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
5110 link_order
->u
.reloc
.p
->u
.name
,
5111 false, false, true));
5113 && (h
->root
.type
== bfd_link_hash_defined
5114 || h
->root
.type
== bfd_link_hash_defweak
))
5118 section
= h
->root
.u
.def
.section
;
5119 indx
= section
->output_section
->target_index
;
5120 *rel_hash_ptr
= NULL
;
5121 /* It seems that we ought to add the symbol value to the
5122 addend here, but in practice it has already been added
5123 because it was passed to constructor_callback. */
5124 addend
+= section
->output_section
->vma
+ section
->output_offset
;
5128 /* Setting the index to -2 tells elf_link_output_extsym that
5129 this symbol is used by a reloc. */
5136 if (! ((*info
->callbacks
->unattached_reloc
)
5137 (info
, link_order
->u
.reloc
.p
->u
.name
, (bfd
*) NULL
,
5138 (asection
*) NULL
, (bfd_vma
) 0)))
5144 /* If this is an inplace reloc, we must write the addend into the
5146 if (howto
->partial_inplace
&& addend
!= 0)
5149 bfd_reloc_status_type rstat
;
5153 size
= bfd_get_reloc_size (howto
);
5154 buf
= (bfd_byte
*) bfd_zmalloc (size
);
5155 if (buf
== (bfd_byte
*) NULL
)
5157 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
5163 case bfd_reloc_outofrange
:
5165 case bfd_reloc_overflow
:
5166 if (! ((*info
->callbacks
->reloc_overflow
)
5168 (link_order
->type
== bfd_section_reloc_link_order
5169 ? bfd_section_name (output_bfd
,
5170 link_order
->u
.reloc
.p
->u
.section
)
5171 : link_order
->u
.reloc
.p
->u
.name
),
5172 howto
->name
, addend
, (bfd
*) NULL
, (asection
*) NULL
,
5180 ok
= bfd_set_section_contents (output_bfd
, output_section
, (PTR
) buf
,
5181 (file_ptr
) link_order
->offset
, size
);
5187 /* The address of a reloc is relative to the section in a
5188 relocateable file, and is a virtual address in an executable
5190 offset
= link_order
->offset
;
5191 if (! info
->relocateable
)
5192 offset
+= output_section
->vma
;
5194 rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
5196 if (rel_hdr
->sh_type
== SHT_REL
)
5198 Elf_Internal_Rel irel
;
5199 Elf_External_Rel
*erel
;
5201 irel
.r_offset
= offset
;
5202 irel
.r_info
= ELF_R_INFO (indx
, howto
->type
);
5203 erel
= ((Elf_External_Rel
*) rel_hdr
->contents
5204 + output_section
->reloc_count
);
5205 elf_swap_reloc_out (output_bfd
, &irel
, erel
);
5209 Elf_Internal_Rela irela
;
5210 Elf_External_Rela
*erela
;
5212 irela
.r_offset
= offset
;
5213 irela
.r_info
= ELF_R_INFO (indx
, howto
->type
);
5214 irela
.r_addend
= addend
;
5215 erela
= ((Elf_External_Rela
*) rel_hdr
->contents
5216 + output_section
->reloc_count
);
5217 elf_swap_reloca_out (output_bfd
, &irela
, erela
);
5220 ++output_section
->reloc_count
;
5226 /* Allocate a pointer to live in a linker created section. */
5229 elf_create_pointer_linker_section (abfd
, info
, lsect
, h
, rel
)
5231 struct bfd_link_info
*info
;
5232 elf_linker_section_t
*lsect
;
5233 struct elf_link_hash_entry
*h
;
5234 const Elf_Internal_Rela
*rel
;
5236 elf_linker_section_pointers_t
**ptr_linker_section_ptr
= NULL
;
5237 elf_linker_section_pointers_t
*linker_section_ptr
;
5238 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);;
5240 BFD_ASSERT (lsect
!= NULL
);
5242 /* Is this a global symbol? */
5245 /* Has this symbol already been allocated, if so, our work is done */
5246 if (_bfd_elf_find_pointer_linker_section (h
->linker_section_pointer
,
5251 ptr_linker_section_ptr
= &h
->linker_section_pointer
;
5252 /* Make sure this symbol is output as a dynamic symbol. */
5253 if (h
->dynindx
== -1)
5255 if (! elf_link_record_dynamic_symbol (info
, h
))
5259 if (lsect
->rel_section
)
5260 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
5263 else /* Allocation of a pointer to a local symbol */
5265 elf_linker_section_pointers_t
**ptr
= elf_local_ptr_offsets (abfd
);
5267 /* Allocate a table to hold the local symbols if first time */
5270 unsigned int num_symbols
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
5271 register unsigned int i
;
5273 ptr
= (elf_linker_section_pointers_t
**)
5274 bfd_alloc (abfd
, num_symbols
* sizeof (elf_linker_section_pointers_t
*));
5279 elf_local_ptr_offsets (abfd
) = ptr
;
5280 for (i
= 0; i
< num_symbols
; i
++)
5281 ptr
[i
] = (elf_linker_section_pointers_t
*)0;
5284 /* Has this symbol already been allocated, if so, our work is done */
5285 if (_bfd_elf_find_pointer_linker_section (ptr
[r_symndx
],
5290 ptr_linker_section_ptr
= &ptr
[r_symndx
];
5294 /* If we are generating a shared object, we need to
5295 output a R_<xxx>_RELATIVE reloc so that the
5296 dynamic linker can adjust this GOT entry. */
5297 BFD_ASSERT (lsect
->rel_section
!= NULL
);
5298 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
5302 /* Allocate space for a pointer in the linker section, and allocate a new pointer record
5303 from internal memory. */
5304 BFD_ASSERT (ptr_linker_section_ptr
!= NULL
);
5305 linker_section_ptr
= (elf_linker_section_pointers_t
*)
5306 bfd_alloc (abfd
, sizeof (elf_linker_section_pointers_t
));
5308 if (!linker_section_ptr
)
5311 linker_section_ptr
->next
= *ptr_linker_section_ptr
;
5312 linker_section_ptr
->addend
= rel
->r_addend
;
5313 linker_section_ptr
->which
= lsect
->which
;
5314 linker_section_ptr
->written_address_p
= false;
5315 *ptr_linker_section_ptr
= linker_section_ptr
;
5318 if (lsect
->hole_size
&& lsect
->hole_offset
< lsect
->max_hole_offset
)
5320 linker_section_ptr
->offset
= lsect
->section
->_raw_size
- lsect
->hole_size
+ (ARCH_SIZE
/ 8);
5321 lsect
->hole_offset
+= ARCH_SIZE
/ 8;
5322 lsect
->sym_offset
+= ARCH_SIZE
/ 8;
5323 if (lsect
->sym_hash
) /* Bump up symbol value if needed */
5325 lsect
->sym_hash
->root
.u
.def
.value
+= ARCH_SIZE
/ 8;
5327 fprintf (stderr
, "Bump up %s by %ld, current value = %ld\n",
5328 lsect
->sym_hash
->root
.root
.string
,
5329 (long)ARCH_SIZE
/ 8,
5330 (long)lsect
->sym_hash
->root
.u
.def
.value
);
5336 linker_section_ptr
->offset
= lsect
->section
->_raw_size
;
5338 lsect
->section
->_raw_size
+= ARCH_SIZE
/ 8;
5341 fprintf (stderr
, "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
5342 lsect
->name
, (long)linker_section_ptr
->offset
, (long)lsect
->section
->_raw_size
);
5350 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR)
5353 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR)
5356 /* Fill in the address for a pointer generated in alinker section. */
5359 elf_finish_pointer_linker_section (output_bfd
, input_bfd
, info
, lsect
, h
, relocation
, rel
, relative_reloc
)
5362 struct bfd_link_info
*info
;
5363 elf_linker_section_t
*lsect
;
5364 struct elf_link_hash_entry
*h
;
5366 const Elf_Internal_Rela
*rel
;
5369 elf_linker_section_pointers_t
*linker_section_ptr
;
5371 BFD_ASSERT (lsect
!= NULL
);
5373 if (h
!= NULL
) /* global symbol */
5375 linker_section_ptr
= _bfd_elf_find_pointer_linker_section (h
->linker_section_pointer
,
5379 BFD_ASSERT (linker_section_ptr
!= NULL
);
5381 if (! elf_hash_table (info
)->dynamic_sections_created
5384 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
5386 /* This is actually a static link, or it is a
5387 -Bsymbolic link and the symbol is defined
5388 locally. We must initialize this entry in the
5391 When doing a dynamic link, we create a .rela.<xxx>
5392 relocation entry to initialize the value. This
5393 is done in the finish_dynamic_symbol routine. */
5394 if (!linker_section_ptr
->written_address_p
)
5396 linker_section_ptr
->written_address_p
= true;
5397 bfd_put_ptr (output_bfd
, relocation
+ linker_section_ptr
->addend
,
5398 lsect
->section
->contents
+ linker_section_ptr
->offset
);
5402 else /* local symbol */
5404 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
5405 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
) != NULL
);
5406 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
)[r_symndx
] != NULL
);
5407 linker_section_ptr
= _bfd_elf_find_pointer_linker_section (elf_local_ptr_offsets (input_bfd
)[r_symndx
],
5411 BFD_ASSERT (linker_section_ptr
!= NULL
);
5413 /* Write out pointer if it hasn't been rewritten out before */
5414 if (!linker_section_ptr
->written_address_p
)
5416 linker_section_ptr
->written_address_p
= true;
5417 bfd_put_ptr (output_bfd
, relocation
+ linker_section_ptr
->addend
,
5418 lsect
->section
->contents
+ linker_section_ptr
->offset
);
5422 asection
*srel
= lsect
->rel_section
;
5423 Elf_Internal_Rela outrel
;
5425 /* We need to generate a relative reloc for the dynamic linker. */
5427 lsect
->rel_section
= srel
= bfd_get_section_by_name (elf_hash_table (info
)->dynobj
,
5430 BFD_ASSERT (srel
!= NULL
);
5432 outrel
.r_offset
= (lsect
->section
->output_section
->vma
5433 + lsect
->section
->output_offset
5434 + linker_section_ptr
->offset
);
5435 outrel
.r_info
= ELF_R_INFO (0, relative_reloc
);
5436 outrel
.r_addend
= 0;
5437 elf_swap_reloca_out (output_bfd
, &outrel
,
5438 (((Elf_External_Rela
*)
5439 lsect
->section
->contents
)
5440 + lsect
->section
->reloc_count
));
5441 ++lsect
->section
->reloc_count
;
5446 relocation
= (lsect
->section
->output_offset
5447 + linker_section_ptr
->offset
5448 - lsect
->hole_offset
5449 - lsect
->sym_offset
);
5452 fprintf (stderr
, "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5453 lsect
->name
, (long)relocation
, (long)relocation
);
5456 /* Subtract out the addend, because it will get added back in by the normal
5458 return relocation
- linker_section_ptr
->addend
;
5461 /* Garbage collect unused sections. */
5463 static boolean elf_gc_mark
5464 PARAMS ((struct bfd_link_info
*info
, asection
*sec
,
5465 asection
* (*gc_mark_hook
)
5466 PARAMS ((bfd
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
5467 struct elf_link_hash_entry
*, Elf_Internal_Sym
*))));
5469 static boolean elf_gc_sweep
5470 PARAMS ((struct bfd_link_info
*info
,
5471 boolean (*gc_sweep_hook
)
5472 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
5473 const Elf_Internal_Rela
*relocs
))));
5475 static boolean elf_gc_sweep_symbol
5476 PARAMS ((struct elf_link_hash_entry
*h
, PTR idxptr
));
5478 static boolean elf_gc_allocate_got_offsets
5479 PARAMS ((struct elf_link_hash_entry
*h
, PTR offarg
));
5481 static boolean elf_gc_propagate_vtable_entries_used
5482 PARAMS ((struct elf_link_hash_entry
*h
, PTR dummy
));
5484 static boolean elf_gc_smash_unused_vtentry_relocs
5485 PARAMS ((struct elf_link_hash_entry
*h
, PTR dummy
));
5487 /* The mark phase of garbage collection. For a given section, mark
5488 it, and all the sections which define symbols to which it refers. */
5491 elf_gc_mark (info
, sec
, gc_mark_hook
)
5492 struct bfd_link_info
*info
;
5494 asection
* (*gc_mark_hook
)
5495 PARAMS ((bfd
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
5496 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
5502 /* Look through the section relocs. */
5504 if ((sec
->flags
& SEC_RELOC
) != 0 && sec
->reloc_count
> 0)
5506 Elf_Internal_Rela
*relstart
, *rel
, *relend
;
5507 Elf_Internal_Shdr
*symtab_hdr
;
5508 struct elf_link_hash_entry
**sym_hashes
;
5511 Elf_External_Sym
*locsyms
, *freesyms
= NULL
;
5512 bfd
*input_bfd
= sec
->owner
;
5514 /* GCFIXME: how to arrange so that relocs and symbols are not
5515 reread continually? */
5517 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
5518 sym_hashes
= elf_sym_hashes (input_bfd
);
5520 /* Read the local symbols. */
5521 if (elf_bad_symtab (input_bfd
))
5523 nlocsyms
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
5527 extsymoff
= nlocsyms
= symtab_hdr
->sh_info
;
5528 if (symtab_hdr
->contents
)
5529 locsyms
= (Elf_External_Sym
*) symtab_hdr
->contents
;
5530 else if (nlocsyms
== 0)
5534 locsyms
= freesyms
=
5535 bfd_malloc (nlocsyms
* sizeof (Elf_External_Sym
));
5536 if (freesyms
== NULL
5537 || bfd_seek (input_bfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
5538 || (bfd_read (locsyms
, sizeof (Elf_External_Sym
),
5539 nlocsyms
, input_bfd
)
5540 != nlocsyms
* sizeof (Elf_External_Sym
)))
5547 /* Read the relocations. */
5548 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
5549 (sec
->owner
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
5550 info
->keep_memory
));
5551 if (relstart
== NULL
)
5556 relend
= relstart
+ sec
->reloc_count
;
5558 for (rel
= relstart
; rel
< relend
; rel
++)
5560 unsigned long r_symndx
;
5562 struct elf_link_hash_entry
*h
;
5565 r_symndx
= ELF_R_SYM (rel
->r_info
);
5569 if (elf_bad_symtab (sec
->owner
))
5571 elf_swap_symbol_in (input_bfd
, &locsyms
[r_symndx
], &s
);
5572 if (ELF_ST_BIND (s
.st_info
) == STB_LOCAL
)
5573 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, NULL
, &s
);
5576 h
= sym_hashes
[r_symndx
- extsymoff
];
5577 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, h
, NULL
);
5580 else if (r_symndx
>= nlocsyms
)
5582 h
= sym_hashes
[r_symndx
- extsymoff
];
5583 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, h
, NULL
);
5587 elf_swap_symbol_in (input_bfd
, &locsyms
[r_symndx
], &s
);
5588 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, NULL
, &s
);
5591 if (rsec
&& !rsec
->gc_mark
)
5592 if (!elf_gc_mark (info
, rsec
, gc_mark_hook
))
5600 if (!info
->keep_memory
)
5610 /* The sweep phase of garbage collection. Remove all garbage sections. */
5613 elf_gc_sweep (info
, gc_sweep_hook
)
5614 struct bfd_link_info
*info
;
5615 boolean (*gc_sweep_hook
)
5616 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
5617 const Elf_Internal_Rela
*relocs
));
5621 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5625 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5627 /* Keep special sections. Keep .debug sections. */
5628 if ((o
->flags
& SEC_LINKER_CREATED
)
5629 || (o
->flags
& SEC_DEBUGGING
))
5635 /* Skip sweeping sections already excluded. */
5636 if (o
->flags
& SEC_EXCLUDE
)
5639 /* Since this is early in the link process, it is simple
5640 to remove a section from the output. */
5641 o
->flags
|= SEC_EXCLUDE
;
5643 /* But we also have to update some of the relocation
5644 info we collected before. */
5646 && (o
->flags
& SEC_RELOC
) && o
->reloc_count
> 0)
5648 Elf_Internal_Rela
*internal_relocs
;
5651 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
5652 (o
->owner
, o
, NULL
, NULL
, info
->keep_memory
));
5653 if (internal_relocs
== NULL
)
5656 r
= (*gc_sweep_hook
)(o
->owner
, info
, o
, internal_relocs
);
5658 if (!info
->keep_memory
)
5659 free (internal_relocs
);
5667 /* Remove the symbols that were in the swept sections from the dynamic
5668 symbol table. GCFIXME: Anyone know how to get them out of the
5669 static symbol table as well? */
5673 elf_link_hash_traverse (elf_hash_table (info
),
5674 elf_gc_sweep_symbol
,
5677 elf_hash_table (info
)->dynsymcount
= i
;
5683 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
5686 elf_gc_sweep_symbol (h
, idxptr
)
5687 struct elf_link_hash_entry
*h
;
5690 int *idx
= (int *) idxptr
;
5692 if (h
->dynindx
!= -1
5693 && ((h
->root
.type
!= bfd_link_hash_defined
5694 && h
->root
.type
!= bfd_link_hash_defweak
)
5695 || h
->root
.u
.def
.section
->gc_mark
))
5696 h
->dynindx
= (*idx
)++;
5701 /* Propogate collected vtable information. This is called through
5702 elf_link_hash_traverse. */
5705 elf_gc_propagate_vtable_entries_used (h
, okp
)
5706 struct elf_link_hash_entry
*h
;
5709 /* Those that are not vtables. */
5710 if (h
->vtable_parent
== NULL
)
5713 /* Those vtables that do not have parents, we cannot merge. */
5714 if (h
->vtable_parent
== (struct elf_link_hash_entry
*) -1)
5717 /* If we've already been done, exit. */
5718 if (h
->vtable_entries_used
&& h
->vtable_entries_used
[-1])
5721 /* Make sure the parent's table is up to date. */
5722 elf_gc_propagate_vtable_entries_used (h
->vtable_parent
, okp
);
5724 if (h
->vtable_entries_used
== NULL
)
5726 /* None of this table's entries were referenced. Re-use the
5728 h
->vtable_entries_used
= h
->vtable_parent
->vtable_entries_used
;
5729 h
->vtable_entries_size
= h
->vtable_parent
->vtable_entries_size
;
5736 /* Or the parent's entries into ours. */
5737 cu
= h
->vtable_entries_used
;
5739 pu
= h
->vtable_parent
->vtable_entries_used
;
5742 n
= h
->vtable_parent
->vtable_entries_size
/ FILE_ALIGN
;
5745 if (*pu
) *cu
= true;
5755 elf_gc_smash_unused_vtentry_relocs (h
, okp
)
5756 struct elf_link_hash_entry
*h
;
5760 bfd_vma hstart
, hend
;
5761 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
5763 /* Take care of both those symbols that do not describe vtables as
5764 well as those that are not loaded. */
5765 if (h
->vtable_parent
== NULL
)
5768 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
5769 || h
->root
.type
== bfd_link_hash_defweak
);
5771 sec
= h
->root
.u
.def
.section
;
5772 hstart
= h
->root
.u
.def
.value
;
5773 hend
= hstart
+ h
->size
;
5775 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
5776 (sec
->owner
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
, true));
5778 return *(boolean
*)okp
= false;
5779 relend
= relstart
+ sec
->reloc_count
;
5781 for (rel
= relstart
; rel
< relend
; ++rel
)
5782 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
5784 /* If the entry is in use, do nothing. */
5785 if (h
->vtable_entries_used
5786 && (rel
->r_offset
- hstart
) < h
->vtable_entries_size
)
5788 bfd_vma entry
= (rel
->r_offset
- hstart
) / FILE_ALIGN
;
5789 if (h
->vtable_entries_used
[entry
])
5792 /* Otherwise, kill it. */
5793 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
5799 /* Do mark and sweep of unused sections. */
5802 elf_gc_sections (abfd
, info
)
5804 struct bfd_link_info
*info
;
5808 asection
* (*gc_mark_hook
)
5809 PARAMS ((bfd
*abfd
, struct bfd_link_info
*, Elf_Internal_Rela
*,
5810 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*));
5812 if (!get_elf_backend_data (abfd
)->can_gc_sections
5813 || info
->relocateable
5814 || elf_hash_table (info
)->dynamic_sections_created
)
5817 /* Apply transitive closure to the vtable entry usage info. */
5818 elf_link_hash_traverse (elf_hash_table (info
),
5819 elf_gc_propagate_vtable_entries_used
,
5824 /* Kill the vtable relocations that were not used. */
5825 elf_link_hash_traverse (elf_hash_table (info
),
5826 elf_gc_smash_unused_vtentry_relocs
,
5831 /* Grovel through relocs to find out who stays ... */
5833 gc_mark_hook
= get_elf_backend_data (abfd
)->gc_mark_hook
;
5834 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5837 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5839 if (o
->flags
& SEC_KEEP
)
5840 if (!elf_gc_mark (info
, o
, gc_mark_hook
))
5845 /* ... and mark SEC_EXCLUDE for those that go. */
5846 if (!elf_gc_sweep(info
, get_elf_backend_data (abfd
)->gc_sweep_hook
))
5852 /* Called from check_relocs to record the existance of a VTINHERIT reloc. */
5855 elf_gc_record_vtinherit (abfd
, sec
, h
, offset
)
5858 struct elf_link_hash_entry
*h
;
5861 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
5862 struct elf_link_hash_entry
**search
, *child
;
5863 bfd_size_type extsymcount
;
5865 /* The sh_info field of the symtab header tells us where the
5866 external symbols start. We don't care about the local symbols at
5868 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/sizeof (Elf_External_Sym
);
5869 if (!elf_bad_symtab (abfd
))
5870 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
5872 sym_hashes
= elf_sym_hashes (abfd
);
5873 sym_hashes_end
= sym_hashes
+ extsymcount
;
5875 /* Hunt down the child symbol, which is in this section at the same
5876 offset as the relocation. */
5877 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
5879 if ((child
= *search
) != NULL
5880 && (child
->root
.type
== bfd_link_hash_defined
5881 || child
->root
.type
== bfd_link_hash_defweak
)
5882 && child
->root
.u
.def
.section
== sec
5883 && child
->root
.u
.def
.value
== offset
)
5887 (*_bfd_error_handler
) ("%s: %s+%lu: No symbol found for INHERIT",
5888 bfd_get_filename (abfd
), sec
->name
,
5889 (unsigned long)offset
);
5890 bfd_set_error (bfd_error_invalid_operation
);
5896 /* This *should* only be the absolute section. It could potentially
5897 be that someone has defined a non-global vtable though, which
5898 would be bad. It isn't worth paging in the local symbols to be
5899 sure though; that case should simply be handled by the assembler. */
5901 child
->vtable_parent
= (struct elf_link_hash_entry
*) -1;
5904 child
->vtable_parent
= h
;
5909 /* Called from check_relocs to record the existance of a VTENTRY reloc. */
5912 elf_gc_record_vtentry (abfd
, sec
, h
, addend
)
5915 struct elf_link_hash_entry
*h
;
5918 if (addend
>= h
->vtable_entries_size
)
5921 boolean
*ptr
= h
->vtable_entries_used
;
5923 /* While the symbol is undefined, we have to be prepared to handle
5925 if (h
->root
.type
== bfd_link_hash_undefined
)
5932 /* Oops! We've got a reference past the defined end of
5933 the table. This is probably a bug -- shall we warn? */
5938 /* Allocate one extra entry for use as a "done" flag for the
5939 consolidation pass. */
5940 bytes
= (size
/ FILE_ALIGN
+ 1) * sizeof(boolean
);
5946 ptr
= realloc (ptr
-1, bytes
);
5950 oldbytes
= (h
->vtable_entries_size
/FILE_ALIGN
+ 1) * sizeof(boolean
);
5951 memset (ptr
+ oldbytes
, 0, bytes
- oldbytes
);
5955 ptr
= calloc (1, bytes
);
5960 /* And arrange for that done flag to be at index -1. */
5961 h
->vtable_entries_used
= ptr
+1;
5962 h
->vtable_entries_size
= size
;
5964 h
->vtable_entries_used
[addend
/ FILE_ALIGN
] = true;
5969 /* And an accompanying bit to work out final got entry offsets once
5970 we're done. Should be called from final_link. */
5973 elf_gc_common_finalize_got_offsets (abfd
, info
)
5975 struct bfd_link_info
*info
;
5978 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5981 /* The GOT offset is relative to the .got section, but the GOT header is
5982 put into the .got.plt section, if the backend uses it. */
5983 if (bed
->want_got_plt
)
5986 gotoff
= bed
->got_header_size
;
5988 /* Do the local .got entries first. */
5989 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
5991 bfd_signed_vma
*local_got
= elf_local_got_refcounts (i
);
5992 bfd_size_type j
, locsymcount
;
5993 Elf_Internal_Shdr
*symtab_hdr
;
5998 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
5999 if (elf_bad_symtab (i
))
6000 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6002 locsymcount
= symtab_hdr
->sh_info
;
6004 for (j
= 0; j
< locsymcount
; ++j
)
6006 if (local_got
[j
] > 0)
6008 local_got
[j
] = gotoff
;
6009 gotoff
+= ARCH_SIZE
/ 8;
6012 local_got
[j
] = (bfd_vma
) -1;
6016 /* Then the global .got and .plt entries. */
6017 elf_link_hash_traverse (elf_hash_table (info
),
6018 elf_gc_allocate_got_offsets
,
6023 /* We need a special top-level link routine to convert got reference counts
6024 to real got offsets. */
6027 elf_gc_allocate_got_offsets (h
, offarg
)
6028 struct elf_link_hash_entry
*h
;
6031 bfd_vma
*off
= (bfd_vma
*) offarg
;
6033 if (h
->got
.refcount
> 0)
6035 h
->got
.offset
= off
[0];
6036 off
[0] += ARCH_SIZE
/ 8;
6039 h
->got
.offset
= (bfd_vma
) -1;
6044 /* Many folk need no more in the way of final link than this, once
6045 got entry reference counting is enabled. */
6048 elf_gc_common_final_link (abfd
, info
)
6050 struct bfd_link_info
*info
;
6052 if (!elf_gc_common_finalize_got_offsets (abfd
, info
))
6055 /* Invoke the regular ELF backend linker to do all the work. */
6056 return elf_bfd_final_link (abfd
, info
);
6059 /* This function will be called though elf_link_hash_traverse to store
6060 all hash value of the exported symbols in an array. */
6063 elf_collect_hash_codes (h
, data
)
6064 struct elf_link_hash_entry
*h
;
6067 unsigned long **valuep
= (unsigned long **) data
;
6073 /* Ignore indirect symbols. These are added by the versioning code. */
6074 if (h
->dynindx
== -1)
6077 name
= h
->root
.root
.string
;
6078 p
= strchr (name
, ELF_VER_CHR
);
6081 alc
= bfd_malloc (p
- name
+ 1);
6082 memcpy (alc
, name
, p
- name
);
6083 alc
[p
- name
] = '\0';
6087 /* Compute the hash value. */
6088 ha
= bfd_elf_hash (name
);
6090 /* Store the found hash value in the array given as the argument. */
6093 /* And store it in the struct so that we can put it in the hash table
6095 h
->elf_hash_value
= ha
;