2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* ELF linker code. */
23 /* This struct is used to pass information to routines called via
24 elf_link_hash_traverse which must return failure. */
26 struct elf_info_failed
29 struct bfd_link_info
*info
;
30 struct bfd_elf_version_tree
*verdefs
;
33 static bfd_boolean is_global_data_symbol_definition
34 PARAMS ((bfd
*, Elf_Internal_Sym
*));
35 static bfd_boolean elf_link_is_defined_archive_symbol
36 PARAMS ((bfd
*, carsym
*));
37 static bfd_boolean elf_link_add_object_symbols
38 PARAMS ((bfd
*, struct bfd_link_info
*));
39 static bfd_boolean elf_link_add_archive_symbols
40 PARAMS ((bfd
*, struct bfd_link_info
*));
41 static bfd_boolean elf_merge_symbol
42 PARAMS ((bfd
*, struct bfd_link_info
*, const char *,
43 Elf_Internal_Sym
*, asection
**, bfd_vma
*,
44 struct elf_link_hash_entry
**, bfd_boolean
*, bfd_boolean
*,
45 bfd_boolean
*, bfd_boolean
));
46 static bfd_boolean elf_add_default_symbol
47 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*,
48 const char *, Elf_Internal_Sym
*, asection
**, bfd_vma
*,
49 bfd_boolean
*, bfd_boolean
, bfd_boolean
));
50 static bfd_boolean elf_export_symbol
51 PARAMS ((struct elf_link_hash_entry
*, PTR
));
52 static bfd_boolean elf_finalize_dynstr
53 PARAMS ((bfd
*, struct bfd_link_info
*));
54 static bfd_boolean elf_fix_symbol_flags
55 PARAMS ((struct elf_link_hash_entry
*, struct elf_info_failed
*));
56 static bfd_boolean elf_adjust_dynamic_symbol
57 PARAMS ((struct elf_link_hash_entry
*, PTR
));
58 static bfd_boolean elf_link_find_version_dependencies
59 PARAMS ((struct elf_link_hash_entry
*, PTR
));
60 static bfd_boolean elf_link_assign_sym_version
61 PARAMS ((struct elf_link_hash_entry
*, PTR
));
62 static bfd_boolean elf_collect_hash_codes
63 PARAMS ((struct elf_link_hash_entry
*, PTR
));
64 static bfd_boolean elf_link_read_relocs_from_section
65 PARAMS ((bfd
*, Elf_Internal_Shdr
*, PTR
, Elf_Internal_Rela
*));
66 static size_t compute_bucket_count
67 PARAMS ((struct bfd_link_info
*));
68 static bfd_boolean elf_link_output_relocs
69 PARAMS ((bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*));
70 static bfd_boolean elf_link_size_reloc_section
71 PARAMS ((bfd
*, Elf_Internal_Shdr
*, asection
*));
72 static void elf_link_adjust_relocs
73 PARAMS ((bfd
*, Elf_Internal_Shdr
*, unsigned int,
74 struct elf_link_hash_entry
**));
75 static int elf_link_sort_cmp1
76 PARAMS ((const void *, const void *));
77 static int elf_link_sort_cmp2
78 PARAMS ((const void *, const void *));
79 static size_t elf_link_sort_relocs
80 PARAMS ((bfd
*, struct bfd_link_info
*, asection
**));
81 static bfd_boolean elf_section_ignore_discarded_relocs
82 PARAMS ((asection
*));
84 /* Given an ELF BFD, add symbols to the global hash table as
88 elf_bfd_link_add_symbols (abfd
, info
)
90 struct bfd_link_info
*info
;
92 switch (bfd_get_format (abfd
))
95 return elf_link_add_object_symbols (abfd
, info
);
97 return elf_link_add_archive_symbols (abfd
, info
);
99 bfd_set_error (bfd_error_wrong_format
);
104 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
106 is_global_data_symbol_definition (abfd
, sym
)
107 bfd
* abfd ATTRIBUTE_UNUSED
;
108 Elf_Internal_Sym
* sym
;
110 /* Local symbols do not count, but target specific ones might. */
111 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
112 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
115 /* Function symbols do not count. */
116 if (ELF_ST_TYPE (sym
->st_info
) == STT_FUNC
)
119 /* If the section is undefined, then so is the symbol. */
120 if (sym
->st_shndx
== SHN_UNDEF
)
123 /* If the symbol is defined in the common section, then
124 it is a common definition and so does not count. */
125 if (sym
->st_shndx
== SHN_COMMON
)
128 /* If the symbol is in a target specific section then we
129 must rely upon the backend to tell us what it is. */
130 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
131 /* FIXME - this function is not coded yet:
133 return _bfd_is_global_symbol_definition (abfd, sym);
135 Instead for now assume that the definition is not global,
136 Even if this is wrong, at least the linker will behave
137 in the same way that it used to do. */
143 /* Search the symbol table of the archive element of the archive ABFD
144 whose archive map contains a mention of SYMDEF, and determine if
145 the symbol is defined in this element. */
147 elf_link_is_defined_archive_symbol (abfd
, symdef
)
151 Elf_Internal_Shdr
* hdr
;
152 bfd_size_type symcount
;
153 bfd_size_type extsymcount
;
154 bfd_size_type extsymoff
;
155 Elf_Internal_Sym
*isymbuf
;
156 Elf_Internal_Sym
*isym
;
157 Elf_Internal_Sym
*isymend
;
160 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
161 if (abfd
== (bfd
*) NULL
)
164 if (! bfd_check_format (abfd
, bfd_object
))
167 /* If we have already included the element containing this symbol in the
168 link then we do not need to include it again. Just claim that any symbol
169 it contains is not a definition, so that our caller will not decide to
170 (re)include this element. */
171 if (abfd
->archive_pass
)
174 /* Select the appropriate symbol table. */
175 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
176 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
178 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
180 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
182 /* The sh_info field of the symtab header tells us where the
183 external symbols start. We don't care about the local symbols. */
184 if (elf_bad_symtab (abfd
))
186 extsymcount
= symcount
;
191 extsymcount
= symcount
- hdr
->sh_info
;
192 extsymoff
= hdr
->sh_info
;
195 if (extsymcount
== 0)
198 /* Read in the symbol table. */
199 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
204 /* Scan the symbol table looking for SYMDEF. */
206 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
210 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
212 if (name
== (const char *) NULL
)
215 if (strcmp (name
, symdef
->name
) == 0)
217 result
= is_global_data_symbol_definition (abfd
, isym
);
227 /* Add symbols from an ELF archive file to the linker hash table. We
228 don't use _bfd_generic_link_add_archive_symbols because of a
229 problem which arises on UnixWare. The UnixWare libc.so is an
230 archive which includes an entry libc.so.1 which defines a bunch of
231 symbols. The libc.so archive also includes a number of other
232 object files, which also define symbols, some of which are the same
233 as those defined in libc.so.1. Correct linking requires that we
234 consider each object file in turn, and include it if it defines any
235 symbols we need. _bfd_generic_link_add_archive_symbols does not do
236 this; it looks through the list of undefined symbols, and includes
237 any object file which defines them. When this algorithm is used on
238 UnixWare, it winds up pulling in libc.so.1 early and defining a
239 bunch of symbols. This means that some of the other objects in the
240 archive are not included in the link, which is incorrect since they
241 precede libc.so.1 in the archive.
243 Fortunately, ELF archive handling is simpler than that done by
244 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
245 oddities. In ELF, if we find a symbol in the archive map, and the
246 symbol is currently undefined, we know that we must pull in that
249 Unfortunately, we do have to make multiple passes over the symbol
250 table until nothing further is resolved. */
253 elf_link_add_archive_symbols (abfd
, info
)
255 struct bfd_link_info
*info
;
258 bfd_boolean
*defined
= NULL
;
259 bfd_boolean
*included
= NULL
;
264 if (! bfd_has_map (abfd
))
266 /* An empty archive is a special case. */
267 if (bfd_openr_next_archived_file (abfd
, (bfd
*) NULL
) == NULL
)
269 bfd_set_error (bfd_error_no_armap
);
273 /* Keep track of all symbols we know to be already defined, and all
274 files we know to be already included. This is to speed up the
275 second and subsequent passes. */
276 c
= bfd_ardata (abfd
)->symdef_count
;
280 amt
*= sizeof (bfd_boolean
);
281 defined
= (bfd_boolean
*) bfd_zmalloc (amt
);
282 included
= (bfd_boolean
*) bfd_zmalloc (amt
);
283 if (defined
== (bfd_boolean
*) NULL
|| included
== (bfd_boolean
*) NULL
)
286 symdefs
= bfd_ardata (abfd
)->symdefs
;
299 symdefend
= symdef
+ c
;
300 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
302 struct elf_link_hash_entry
*h
;
304 struct bfd_link_hash_entry
*undefs_tail
;
307 if (defined
[i
] || included
[i
])
309 if (symdef
->file_offset
== last
)
315 h
= elf_link_hash_lookup (elf_hash_table (info
), symdef
->name
,
316 FALSE
, FALSE
, FALSE
);
323 /* If this is a default version (the name contains @@),
324 look up the symbol again with only one `@' as well
325 as without the version. The effect is that references
326 to the symbol with and without the version will be
327 matched by the default symbol in the archive. */
329 p
= strchr (symdef
->name
, ELF_VER_CHR
);
330 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
333 /* First check with only one `@'. */
334 len
= strlen (symdef
->name
);
335 copy
= bfd_alloc (abfd
, (bfd_size_type
) len
);
338 first
= p
- symdef
->name
+ 1;
339 memcpy (copy
, symdef
->name
, first
);
340 memcpy (copy
+ first
, symdef
->name
+ first
+ 1, len
- first
);
342 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
343 FALSE
, FALSE
, FALSE
);
347 /* We also need to check references to the symbol
348 without the version. */
350 copy
[first
- 1] = '\0';
351 h
= elf_link_hash_lookup (elf_hash_table (info
),
352 copy
, FALSE
, FALSE
, FALSE
);
355 bfd_release (abfd
, copy
);
361 if (h
->root
.type
== bfd_link_hash_common
)
363 /* We currently have a common symbol. The archive map contains
364 a reference to this symbol, so we may want to include it. We
365 only want to include it however, if this archive element
366 contains a definition of the symbol, not just another common
369 Unfortunately some archivers (including GNU ar) will put
370 declarations of common symbols into their archive maps, as
371 well as real definitions, so we cannot just go by the archive
372 map alone. Instead we must read in the element's symbol
373 table and check that to see what kind of symbol definition
375 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
378 else if (h
->root
.type
!= bfd_link_hash_undefined
)
380 if (h
->root
.type
!= bfd_link_hash_undefweak
)
385 /* We need to include this archive member. */
386 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
387 if (element
== (bfd
*) NULL
)
390 if (! bfd_check_format (element
, bfd_object
))
393 /* Doublecheck that we have not included this object
394 already--it should be impossible, but there may be
395 something wrong with the archive. */
396 if (element
->archive_pass
!= 0)
398 bfd_set_error (bfd_error_bad_value
);
401 element
->archive_pass
= 1;
403 undefs_tail
= info
->hash
->undefs_tail
;
405 if (! (*info
->callbacks
->add_archive_element
) (info
, element
,
408 if (! elf_link_add_object_symbols (element
, info
))
411 /* If there are any new undefined symbols, we need to make
412 another pass through the archive in order to see whether
413 they can be defined. FIXME: This isn't perfect, because
414 common symbols wind up on undefs_tail and because an
415 undefined symbol which is defined later on in this pass
416 does not require another pass. This isn't a bug, but it
417 does make the code less efficient than it could be. */
418 if (undefs_tail
!= info
->hash
->undefs_tail
)
421 /* Look backward to mark all symbols from this object file
422 which we have already seen in this pass. */
426 included
[mark
] = TRUE
;
431 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
433 /* We mark subsequent symbols from this object file as we go
434 on through the loop. */
435 last
= symdef
->file_offset
;
446 if (defined
!= (bfd_boolean
*) NULL
)
448 if (included
!= (bfd_boolean
*) NULL
)
453 /* This function is called when we want to define a new symbol. It
454 handles the various cases which arise when we find a definition in
455 a dynamic object, or when there is already a definition in a
456 dynamic object. The new symbol is described by NAME, SYM, PSEC,
457 and PVALUE. We set SYM_HASH to the hash table entry. We set
458 OVERRIDE if the old symbol is overriding a new definition. We set
459 TYPE_CHANGE_OK if it is OK for the type to change. We set
460 SIZE_CHANGE_OK if it is OK for the size to change. By OK to
461 change, we mean that we shouldn't warn if the type or size does
462 change. DT_NEEDED indicates if it comes from a DT_NEEDED entry of
466 elf_merge_symbol (abfd
, info
, name
, sym
, psec
, pvalue
, sym_hash
,
467 override
, type_change_ok
, size_change_ok
, dt_needed
)
469 struct bfd_link_info
*info
;
471 Elf_Internal_Sym
*sym
;
474 struct elf_link_hash_entry
**sym_hash
;
475 bfd_boolean
*override
;
476 bfd_boolean
*type_change_ok
;
477 bfd_boolean
*size_change_ok
;
478 bfd_boolean dt_needed
;
481 struct elf_link_hash_entry
*h
;
484 bfd_boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
489 bind
= ELF_ST_BIND (sym
->st_info
);
491 if (! bfd_is_und_section (sec
))
492 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, FALSE
, FALSE
);
494 h
= ((struct elf_link_hash_entry
*)
495 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, TRUE
, FALSE
, FALSE
));
500 /* This code is for coping with dynamic objects, and is only useful
501 if we are doing an ELF link. */
502 if (info
->hash
->creator
!= abfd
->xvec
)
505 /* For merging, we only care about real symbols. */
507 while (h
->root
.type
== bfd_link_hash_indirect
508 || h
->root
.type
== bfd_link_hash_warning
)
509 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
511 /* If we just created the symbol, mark it as being an ELF symbol.
512 Other than that, there is nothing to do--there is no merge issue
513 with a newly defined symbol--so we just return. */
515 if (h
->root
.type
== bfd_link_hash_new
)
517 h
->elf_link_hash_flags
&=~ ELF_LINK_NON_ELF
;
521 /* OLDBFD is a BFD associated with the existing symbol. */
523 switch (h
->root
.type
)
529 case bfd_link_hash_undefined
:
530 case bfd_link_hash_undefweak
:
531 oldbfd
= h
->root
.u
.undef
.abfd
;
534 case bfd_link_hash_defined
:
535 case bfd_link_hash_defweak
:
536 oldbfd
= h
->root
.u
.def
.section
->owner
;
539 case bfd_link_hash_common
:
540 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
544 /* In cases involving weak versioned symbols, we may wind up trying
545 to merge a symbol with itself. Catch that here, to avoid the
546 confusion that results if we try to override a symbol with
547 itself. The additional tests catch cases like
548 _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
549 dynamic object, which we do want to handle here. */
551 && ((abfd
->flags
& DYNAMIC
) == 0
552 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0))
555 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
556 respectively, is from a dynamic object. */
558 if ((abfd
->flags
& DYNAMIC
) != 0)
564 olddyn
= (oldbfd
->flags
& DYNAMIC
) != 0;
569 /* This code handles the special SHN_MIPS_{TEXT,DATA} section
570 indices used by MIPS ELF. */
571 switch (h
->root
.type
)
577 case bfd_link_hash_defined
:
578 case bfd_link_hash_defweak
:
579 hsec
= h
->root
.u
.def
.section
;
582 case bfd_link_hash_common
:
583 hsec
= h
->root
.u
.c
.p
->section
;
590 olddyn
= (hsec
->symbol
->flags
& BSF_DYNAMIC
) != 0;
593 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
594 respectively, appear to be a definition rather than reference. */
596 if (bfd_is_und_section (sec
) || bfd_is_com_section (sec
))
601 if (h
->root
.type
== bfd_link_hash_undefined
602 || h
->root
.type
== bfd_link_hash_undefweak
603 || h
->root
.type
== bfd_link_hash_common
)
608 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
609 symbol, respectively, appears to be a common symbol in a dynamic
610 object. If a symbol appears in an uninitialized section, and is
611 not weak, and is not a function, then it may be a common symbol
612 which was resolved when the dynamic object was created. We want
613 to treat such symbols specially, because they raise special
614 considerations when setting the symbol size: if the symbol
615 appears as a common symbol in a regular object, and the size in
616 the regular object is larger, we must make sure that we use the
617 larger size. This problematic case can always be avoided in C,
618 but it must be handled correctly when using Fortran shared
621 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
622 likewise for OLDDYNCOMMON and OLDDEF.
624 Note that this test is just a heuristic, and that it is quite
625 possible to have an uninitialized symbol in a shared object which
626 is really a definition, rather than a common symbol. This could
627 lead to some minor confusion when the symbol really is a common
628 symbol in some regular object. However, I think it will be
633 && (sec
->flags
& SEC_ALLOC
) != 0
634 && (sec
->flags
& SEC_LOAD
) == 0
637 && ELF_ST_TYPE (sym
->st_info
) != STT_FUNC
)
640 newdyncommon
= FALSE
;
644 && h
->root
.type
== bfd_link_hash_defined
645 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
646 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
647 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
649 && h
->type
!= STT_FUNC
)
652 olddyncommon
= FALSE
;
654 /* It's OK to change the type if either the existing symbol or the
655 new symbol is weak unless it comes from a DT_NEEDED entry of
656 a shared object, in which case, the DT_NEEDED entry may not be
657 required at the run time. */
659 if ((! dt_needed
&& h
->root
.type
== bfd_link_hash_defweak
)
660 || h
->root
.type
== bfd_link_hash_undefweak
662 *type_change_ok
= TRUE
;
664 /* It's OK to change the size if either the existing symbol or the
665 new symbol is weak, or if the old symbol is undefined. */
668 || h
->root
.type
== bfd_link_hash_undefined
)
669 *size_change_ok
= TRUE
;
671 /* If both the old and the new symbols look like common symbols in a
672 dynamic object, set the size of the symbol to the larger of the
677 && sym
->st_size
!= h
->size
)
679 /* Since we think we have two common symbols, issue a multiple
680 common warning if desired. Note that we only warn if the
681 size is different. If the size is the same, we simply let
682 the old symbol override the new one as normally happens with
683 symbols defined in dynamic objects. */
685 if (! ((*info
->callbacks
->multiple_common
)
686 (info
, h
->root
.root
.string
, oldbfd
, bfd_link_hash_common
,
687 h
->size
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
690 if (sym
->st_size
> h
->size
)
691 h
->size
= sym
->st_size
;
693 *size_change_ok
= TRUE
;
696 /* If we are looking at a dynamic object, and we have found a
697 definition, we need to see if the symbol was already defined by
698 some other object. If so, we want to use the existing
699 definition, and we do not want to report a multiple symbol
700 definition error; we do this by clobbering *PSEC to be
703 We treat a common symbol as a definition if the symbol in the
704 shared library is a function, since common symbols always
705 represent variables; this can cause confusion in principle, but
706 any such confusion would seem to indicate an erroneous program or
707 shared library. We also permit a common symbol in a regular
708 object to override a weak symbol in a shared object.
710 We prefer a non-weak definition in a shared library to a weak
711 definition in the executable unless it comes from a DT_NEEDED
712 entry of a shared object, in which case, the DT_NEEDED entry
713 may not be required at the run time. */
718 || (h
->root
.type
== bfd_link_hash_common
720 || ELF_ST_TYPE (sym
->st_info
) == STT_FUNC
)))
721 && (h
->root
.type
!= bfd_link_hash_defweak
723 || bind
== STB_WEAK
))
727 newdyncommon
= FALSE
;
729 *psec
= sec
= bfd_und_section_ptr
;
730 *size_change_ok
= TRUE
;
732 /* If we get here when the old symbol is a common symbol, then
733 we are explicitly letting it override a weak symbol or
734 function in a dynamic object, and we don't want to warn about
735 a type change. If the old symbol is a defined symbol, a type
736 change warning may still be appropriate. */
738 if (h
->root
.type
== bfd_link_hash_common
)
739 *type_change_ok
= TRUE
;
742 /* Handle the special case of an old common symbol merging with a
743 new symbol which looks like a common symbol in a shared object.
744 We change *PSEC and *PVALUE to make the new symbol look like a
745 common symbol, and let _bfd_generic_link_add_one_symbol will do
749 && h
->root
.type
== bfd_link_hash_common
)
753 newdyncommon
= FALSE
;
754 *pvalue
= sym
->st_size
;
755 *psec
= sec
= bfd_com_section_ptr
;
756 *size_change_ok
= TRUE
;
759 /* If the old symbol is from a dynamic object, and the new symbol is
760 a definition which is not from a dynamic object, then the new
761 symbol overrides the old symbol. Symbols from regular files
762 always take precedence over symbols from dynamic objects, even if
763 they are defined after the dynamic object in the link.
765 As above, we again permit a common symbol in a regular object to
766 override a definition in a shared object if the shared object
767 symbol is a function or is weak.
769 As above, we permit a non-weak definition in a shared object to
770 override a weak definition in a regular object. */
774 || (bfd_is_com_section (sec
)
775 && (h
->root
.type
== bfd_link_hash_defweak
776 || h
->type
== STT_FUNC
)))
779 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
781 || h
->root
.type
== bfd_link_hash_defweak
))
783 /* Change the hash table entry to undefined, and let
784 _bfd_generic_link_add_one_symbol do the right thing with the
787 h
->root
.type
= bfd_link_hash_undefined
;
788 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
789 *size_change_ok
= TRUE
;
792 olddyncommon
= FALSE
;
794 /* We again permit a type change when a common symbol may be
795 overriding a function. */
797 if (bfd_is_com_section (sec
))
798 *type_change_ok
= TRUE
;
800 /* This union may have been set to be non-NULL when this symbol
801 was seen in a dynamic object. We must force the union to be
802 NULL, so that it is correct for a regular symbol. */
804 h
->verinfo
.vertree
= NULL
;
806 /* In this special case, if H is the target of an indirection,
807 we want the caller to frob with H rather than with the
808 indirect symbol. That will permit the caller to redefine the
809 target of the indirection, rather than the indirect symbol
810 itself. FIXME: This will break the -y option if we store a
811 symbol with a different name. */
815 /* Handle the special case of a new common symbol merging with an
816 old symbol that looks like it might be a common symbol defined in
817 a shared object. Note that we have already handled the case in
818 which a new common symbol should simply override the definition
819 in the shared library. */
822 && bfd_is_com_section (sec
)
825 /* It would be best if we could set the hash table entry to a
826 common symbol, but we don't know what to use for the section
828 if (! ((*info
->callbacks
->multiple_common
)
829 (info
, h
->root
.root
.string
, oldbfd
, bfd_link_hash_common
,
830 h
->size
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
833 /* If the predumed common symbol in the dynamic object is
834 larger, pretend that the new symbol has its size. */
836 if (h
->size
> *pvalue
)
839 /* FIXME: We no longer know the alignment required by the symbol
840 in the dynamic object, so we just wind up using the one from
841 the regular object. */
844 olddyncommon
= FALSE
;
846 h
->root
.type
= bfd_link_hash_undefined
;
847 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
849 *size_change_ok
= TRUE
;
850 *type_change_ok
= TRUE
;
852 h
->verinfo
.vertree
= NULL
;
855 /* Handle the special case of a weak definition in a regular object
856 followed by a non-weak definition in a shared object. In this
857 case, we prefer the definition in the shared object unless it
858 comes from a DT_NEEDED entry of a shared object, in which case,
859 the DT_NEEDED entry may not be required at the run time. */
862 && h
->root
.type
== bfd_link_hash_defweak
867 /* To make this work we have to frob the flags so that the rest
868 of the code does not think we are using the regular
870 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
871 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
872 else if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0)
873 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_DYNAMIC
;
874 h
->elf_link_hash_flags
&= ~ (ELF_LINK_HASH_DEF_REGULAR
875 | ELF_LINK_HASH_DEF_DYNAMIC
);
877 /* If H is the target of an indirection, we want the caller to
878 use H rather than the indirect symbol. Otherwise if we are
879 defining a new indirect symbol we will wind up attaching it
880 to the entry we are overriding. */
884 /* Handle the special case of a non-weak definition in a shared
885 object followed by a weak definition in a regular object. In
886 this case we prefer to definition in the shared object. To make
887 this work we have to tell the caller to not treat the new symbol
891 && h
->root
.type
!= bfd_link_hash_defweak
900 /* This function is called to create an indirect symbol from the
901 default for the symbol with the default version if needed. The
902 symbol is described by H, NAME, SYM, PSEC, VALUE, and OVERRIDE. We
903 set DYNSYM if the new indirect symbol is dynamic. DT_NEEDED
904 indicates if it comes from a DT_NEEDED entry of a shared object. */
907 elf_add_default_symbol (abfd
, info
, h
, name
, sym
, psec
, value
,
908 dynsym
, override
, dt_needed
)
910 struct bfd_link_info
*info
;
911 struct elf_link_hash_entry
*h
;
913 Elf_Internal_Sym
*sym
;
917 bfd_boolean override
;
918 bfd_boolean dt_needed
;
920 bfd_boolean type_change_ok
;
921 bfd_boolean size_change_ok
;
923 struct elf_link_hash_entry
*hi
;
924 struct bfd_link_hash_entry
*bh
;
925 struct elf_backend_data
*bed
;
929 size_t len
, shortlen
;
932 /* If this symbol has a version, and it is the default version, we
933 create an indirect symbol from the default name to the fully
934 decorated name. This will cause external references which do not
935 specify a version to be bound to this version of the symbol. */
936 p
= strchr (name
, ELF_VER_CHR
);
937 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
942 /* We are overridden by an old defition. We need to check if we
943 need to create the indirect symbol from the default name. */
944 hi
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
,
946 BFD_ASSERT (hi
!= NULL
);
949 while (hi
->root
.type
== bfd_link_hash_indirect
950 || hi
->root
.type
== bfd_link_hash_warning
)
952 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
958 bed
= get_elf_backend_data (abfd
);
959 collect
= bed
->collect
;
960 dynamic
= (abfd
->flags
& DYNAMIC
) != 0;
963 shortname
= bfd_hash_allocate (&info
->hash
->table
, shortlen
+ 1);
964 if (shortname
== NULL
)
966 memcpy (shortname
, name
, shortlen
);
967 shortname
[shortlen
] = '\0';
969 /* We are going to create a new symbol. Merge it with any existing
970 symbol with this name. For the purposes of the merge, act as
971 though we were defining the symbol we just defined, although we
972 actually going to define an indirect symbol. */
973 type_change_ok
= FALSE
;
974 size_change_ok
= FALSE
;
976 if (! elf_merge_symbol (abfd
, info
, shortname
, sym
, &sec
, value
,
977 &hi
, &override
, &type_change_ok
,
978 &size_change_ok
, dt_needed
))
984 if (! (_bfd_generic_link_add_one_symbol
985 (info
, abfd
, shortname
, BSF_INDIRECT
, bfd_ind_section_ptr
,
986 (bfd_vma
) 0, name
, FALSE
, collect
, &bh
)))
988 hi
= (struct elf_link_hash_entry
*) bh
;
992 /* In this case the symbol named SHORTNAME is overriding the
993 indirect symbol we want to add. We were planning on making
994 SHORTNAME an indirect symbol referring to NAME. SHORTNAME
995 is the name without a version. NAME is the fully versioned
996 name, and it is the default version.
998 Overriding means that we already saw a definition for the
999 symbol SHORTNAME in a regular object, and it is overriding
1000 the symbol defined in the dynamic object.
1002 When this happens, we actually want to change NAME, the
1003 symbol we just added, to refer to SHORTNAME. This will cause
1004 references to NAME in the shared object to become references
1005 to SHORTNAME in the regular object. This is what we expect
1006 when we override a function in a shared object: that the
1007 references in the shared object will be mapped to the
1008 definition in the regular object. */
1010 while (hi
->root
.type
== bfd_link_hash_indirect
1011 || hi
->root
.type
== bfd_link_hash_warning
)
1012 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1014 h
->root
.type
= bfd_link_hash_indirect
;
1015 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1016 if (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
)
1018 h
->elf_link_hash_flags
&=~ ELF_LINK_HASH_DEF_DYNAMIC
;
1019 hi
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_DYNAMIC
;
1020 if (hi
->elf_link_hash_flags
1021 & (ELF_LINK_HASH_REF_REGULAR
1022 | ELF_LINK_HASH_DEF_REGULAR
))
1024 if (! _bfd_elf_link_record_dynamic_symbol (info
, hi
))
1029 /* Now set HI to H, so that the following code will set the
1030 other fields correctly. */
1034 /* If there is a duplicate definition somewhere, then HI may not
1035 point to an indirect symbol. We will have reported an error to
1036 the user in that case. */
1038 if (hi
->root
.type
== bfd_link_hash_indirect
)
1040 struct elf_link_hash_entry
*ht
;
1042 /* If the symbol became indirect, then we assume that we have
1043 not seen a definition before. */
1044 BFD_ASSERT ((hi
->elf_link_hash_flags
1045 & (ELF_LINK_HASH_DEF_DYNAMIC
1046 | ELF_LINK_HASH_DEF_REGULAR
)) == 0);
1048 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1049 (*bed
->elf_backend_copy_indirect_symbol
) (bed
, ht
, hi
);
1051 /* See if the new flags lead us to realize that the symbol must
1058 || ((hi
->elf_link_hash_flags
1059 & ELF_LINK_HASH_REF_DYNAMIC
) != 0))
1064 if ((hi
->elf_link_hash_flags
1065 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1071 /* We also need to define an indirection from the nondefault version
1074 len
= strlen (name
);
1075 shortname
= bfd_hash_allocate (&info
->hash
->table
, len
);
1076 if (shortname
== NULL
)
1078 memcpy (shortname
, name
, shortlen
);
1079 memcpy (shortname
+ shortlen
, p
+ 1, len
- shortlen
);
1081 /* Once again, merge with any existing symbol. */
1082 type_change_ok
= FALSE
;
1083 size_change_ok
= FALSE
;
1085 if (! elf_merge_symbol (abfd
, info
, shortname
, sym
, &sec
, value
,
1086 &hi
, &override
, &type_change_ok
,
1087 &size_change_ok
, dt_needed
))
1092 /* Here SHORTNAME is a versioned name, so we don't expect to see
1093 the type of override we do in the case above unless it is
1094 overridden by a versioned definiton. */
1095 if (hi
->root
.type
!= bfd_link_hash_defined
1096 && hi
->root
.type
!= bfd_link_hash_defweak
)
1097 (*_bfd_error_handler
)
1098 (_("%s: warning: unexpected redefinition of indirect versioned symbol `%s'"),
1099 bfd_archive_filename (abfd
), shortname
);
1104 if (! (_bfd_generic_link_add_one_symbol
1105 (info
, abfd
, shortname
, BSF_INDIRECT
,
1106 bfd_ind_section_ptr
, (bfd_vma
) 0, name
, FALSE
, collect
, &bh
)))
1108 hi
= (struct elf_link_hash_entry
*) bh
;
1110 /* If there is a duplicate definition somewhere, then HI may not
1111 point to an indirect symbol. We will have reported an error
1112 to the user in that case. */
1114 if (hi
->root
.type
== bfd_link_hash_indirect
)
1116 /* If the symbol became indirect, then we assume that we have
1117 not seen a definition before. */
1118 BFD_ASSERT ((hi
->elf_link_hash_flags
1119 & (ELF_LINK_HASH_DEF_DYNAMIC
1120 | ELF_LINK_HASH_DEF_REGULAR
)) == 0);
1122 (*bed
->elf_backend_copy_indirect_symbol
) (bed
, h
, hi
);
1124 /* See if the new flags lead us to realize that the symbol
1131 || ((hi
->elf_link_hash_flags
1132 & ELF_LINK_HASH_REF_DYNAMIC
) != 0))
1137 if ((hi
->elf_link_hash_flags
1138 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1148 /* Add symbols from an ELF object file to the linker hash table. */
1151 elf_link_add_object_symbols (abfd
, info
)
1153 struct bfd_link_info
*info
;
1155 bfd_boolean (*add_symbol_hook
)
1156 PARAMS ((bfd
*, struct bfd_link_info
*, const Elf_Internal_Sym
*,
1157 const char **, flagword
*, asection
**, bfd_vma
*));
1158 bfd_boolean (*check_relocs
)
1159 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
1160 const Elf_Internal_Rela
*));
1161 bfd_boolean collect
;
1162 Elf_Internal_Shdr
*hdr
;
1163 bfd_size_type symcount
;
1164 bfd_size_type extsymcount
;
1165 bfd_size_type extsymoff
;
1166 struct elf_link_hash_entry
**sym_hash
;
1167 bfd_boolean dynamic
;
1168 Elf_External_Versym
*extversym
= NULL
;
1169 Elf_External_Versym
*ever
;
1170 struct elf_link_hash_entry
*weaks
;
1171 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
1172 bfd_size_type nondeflt_vers_cnt
= 0;
1173 Elf_Internal_Sym
*isymbuf
= NULL
;
1174 Elf_Internal_Sym
*isym
;
1175 Elf_Internal_Sym
*isymend
;
1176 struct elf_backend_data
*bed
;
1177 bfd_boolean dt_needed
;
1178 struct elf_link_hash_table
* hash_table
;
1181 hash_table
= elf_hash_table (info
);
1183 bed
= get_elf_backend_data (abfd
);
1184 add_symbol_hook
= bed
->elf_add_symbol_hook
;
1185 collect
= bed
->collect
;
1187 if ((abfd
->flags
& DYNAMIC
) == 0)
1193 /* You can't use -r against a dynamic object. Also, there's no
1194 hope of using a dynamic object which does not exactly match
1195 the format of the output file. */
1196 if (info
->relocateable
|| info
->hash
->creator
!= abfd
->xvec
)
1198 bfd_set_error (bfd_error_invalid_operation
);
1203 /* As a GNU extension, any input sections which are named
1204 .gnu.warning.SYMBOL are treated as warning symbols for the given
1205 symbol. This differs from .gnu.warning sections, which generate
1206 warnings when they are included in an output file. */
1211 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
1215 name
= bfd_get_section_name (abfd
, s
);
1216 if (strncmp (name
, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0)
1221 name
+= sizeof ".gnu.warning." - 1;
1223 /* If this is a shared object, then look up the symbol
1224 in the hash table. If it is there, and it is already
1225 been defined, then we will not be using the entry
1226 from this shared object, so we don't need to warn.
1227 FIXME: If we see the definition in a regular object
1228 later on, we will warn, but we shouldn't. The only
1229 fix is to keep track of what warnings we are supposed
1230 to emit, and then handle them all at the end of the
1232 if (dynamic
&& abfd
->xvec
== info
->hash
->creator
)
1234 struct elf_link_hash_entry
*h
;
1236 h
= elf_link_hash_lookup (hash_table
, name
,
1237 FALSE
, FALSE
, TRUE
);
1239 /* FIXME: What about bfd_link_hash_common? */
1241 && (h
->root
.type
== bfd_link_hash_defined
1242 || h
->root
.type
== bfd_link_hash_defweak
))
1244 /* We don't want to issue this warning. Clobber
1245 the section size so that the warning does not
1246 get copied into the output file. */
1252 sz
= bfd_section_size (abfd
, s
);
1253 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
1257 if (! bfd_get_section_contents (abfd
, s
, msg
, (file_ptr
) 0, sz
))
1262 if (! (_bfd_generic_link_add_one_symbol
1263 (info
, abfd
, name
, BSF_WARNING
, s
, (bfd_vma
) 0, msg
,
1264 FALSE
, collect
, (struct bfd_link_hash_entry
**) NULL
)))
1267 if (! info
->relocateable
)
1269 /* Clobber the section size so that the warning does
1270 not get copied into the output file. */
1280 /* If we are creating a shared library, create all the dynamic
1281 sections immediately. We need to attach them to something,
1282 so we attach them to this BFD, provided it is the right
1283 format. FIXME: If there are no input BFD's of the same
1284 format as the output, we can't make a shared library. */
1286 && is_elf_hash_table (info
)
1287 && ! hash_table
->dynamic_sections_created
1288 && abfd
->xvec
== info
->hash
->creator
)
1290 if (! elf_link_create_dynamic_sections (abfd
, info
))
1294 else if (! is_elf_hash_table (info
))
1299 bfd_boolean add_needed
;
1301 bfd_size_type oldsize
;
1302 bfd_size_type strindex
;
1303 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
1305 /* ld --just-symbols and dynamic objects don't mix very well.
1306 Test for --just-symbols by looking at info set up by
1307 _bfd_elf_link_just_syms. */
1308 if ((s
= abfd
->sections
) != NULL
1309 && s
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
)
1312 /* Find the name to use in a DT_NEEDED entry that refers to this
1313 object. If the object has a DT_SONAME entry, we use it.
1314 Otherwise, if the generic linker stuck something in
1315 elf_dt_name, we use that. Otherwise, we just use the file
1316 name. If the generic linker put a null string into
1317 elf_dt_name, we don't make a DT_NEEDED entry at all, even if
1318 there is a DT_SONAME entry. */
1320 name
= bfd_get_filename (abfd
);
1321 if (elf_dt_name (abfd
) != NULL
)
1323 name
= elf_dt_name (abfd
);
1326 if (elf_dt_soname (abfd
) != NULL
)
1332 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1335 Elf_External_Dyn
*dynbuf
= NULL
;
1336 Elf_External_Dyn
*extdyn
;
1337 Elf_External_Dyn
*extdynend
;
1339 unsigned long shlink
;
1341 dynbuf
= (Elf_External_Dyn
*) bfd_malloc (s
->_raw_size
);
1345 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
,
1346 (file_ptr
) 0, s
->_raw_size
))
1347 goto error_free_dyn
;
1349 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1351 goto error_free_dyn
;
1352 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1355 extdynend
= extdyn
+ s
->_raw_size
/ sizeof (Elf_External_Dyn
);
1356 for (; extdyn
< extdynend
; extdyn
++)
1358 Elf_Internal_Dyn dyn
;
1360 elf_swap_dyn_in (abfd
, extdyn
, &dyn
);
1361 if (dyn
.d_tag
== DT_SONAME
)
1363 unsigned int tagv
= dyn
.d_un
.d_val
;
1364 name
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1366 goto error_free_dyn
;
1368 if (dyn
.d_tag
== DT_NEEDED
)
1370 struct bfd_link_needed_list
*n
, **pn
;
1372 unsigned int tagv
= dyn
.d_un
.d_val
;
1374 amt
= sizeof (struct bfd_link_needed_list
);
1375 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1376 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1377 if (n
== NULL
|| fnm
== NULL
)
1378 goto error_free_dyn
;
1379 amt
= strlen (fnm
) + 1;
1380 anm
= bfd_alloc (abfd
, amt
);
1382 goto error_free_dyn
;
1383 memcpy (anm
, fnm
, (size_t) amt
);
1387 for (pn
= & hash_table
->needed
;
1393 if (dyn
.d_tag
== DT_RUNPATH
)
1395 struct bfd_link_needed_list
*n
, **pn
;
1397 unsigned int tagv
= dyn
.d_un
.d_val
;
1399 amt
= sizeof (struct bfd_link_needed_list
);
1400 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1401 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1402 if (n
== NULL
|| fnm
== NULL
)
1403 goto error_free_dyn
;
1404 amt
= strlen (fnm
) + 1;
1405 anm
= bfd_alloc (abfd
, amt
);
1407 goto error_free_dyn
;
1408 memcpy (anm
, fnm
, (size_t) amt
);
1412 for (pn
= & runpath
;
1418 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
1419 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
1421 struct bfd_link_needed_list
*n
, **pn
;
1423 unsigned int tagv
= dyn
.d_un
.d_val
;
1425 amt
= sizeof (struct bfd_link_needed_list
);
1426 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1427 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1428 if (n
== NULL
|| fnm
== NULL
)
1429 goto error_free_dyn
;
1430 amt
= strlen (fnm
) + 1;
1431 anm
= bfd_alloc (abfd
, amt
);
1438 memcpy (anm
, fnm
, (size_t) amt
);
1453 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
1454 frees all more recently bfd_alloc'd blocks as well. */
1460 struct bfd_link_needed_list
**pn
;
1461 for (pn
= & hash_table
->runpath
;
1468 /* We do not want to include any of the sections in a dynamic
1469 object in the output file. We hack by simply clobbering the
1470 list of sections in the BFD. This could be handled more
1471 cleanly by, say, a new section flag; the existing
1472 SEC_NEVER_LOAD flag is not the one we want, because that one
1473 still implies that the section takes up space in the output
1475 bfd_section_list_clear (abfd
);
1477 /* If this is the first dynamic object found in the link, create
1478 the special sections required for dynamic linking. */
1479 if (! hash_table
->dynamic_sections_created
)
1480 if (! elf_link_create_dynamic_sections (abfd
, info
))
1485 /* Add a DT_NEEDED entry for this dynamic object. */
1486 oldsize
= _bfd_elf_strtab_size (hash_table
->dynstr
);
1487 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, name
, FALSE
);
1488 if (strindex
== (bfd_size_type
) -1)
1491 if (oldsize
== _bfd_elf_strtab_size (hash_table
->dynstr
))
1494 Elf_External_Dyn
*dyncon
, *dynconend
;
1496 /* The hash table size did not change, which means that
1497 the dynamic object name was already entered. If we
1498 have already included this dynamic object in the
1499 link, just ignore it. There is no reason to include
1500 a particular dynamic object more than once. */
1501 sdyn
= bfd_get_section_by_name (hash_table
->dynobj
, ".dynamic");
1502 BFD_ASSERT (sdyn
!= NULL
);
1504 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
1505 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
1507 for (; dyncon
< dynconend
; dyncon
++)
1509 Elf_Internal_Dyn dyn
;
1511 elf_swap_dyn_in (hash_table
->dynobj
, dyncon
, & dyn
);
1512 if (dyn
.d_tag
== DT_NEEDED
1513 && dyn
.d_un
.d_val
== strindex
)
1515 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
1521 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_NEEDED
, strindex
))
1525 /* Save the SONAME, if there is one, because sometimes the
1526 linker emulation code will need to know it. */
1528 name
= basename (bfd_get_filename (abfd
));
1529 elf_dt_name (abfd
) = name
;
1532 /* If this is a dynamic object, we always link against the .dynsym
1533 symbol table, not the .symtab symbol table. The dynamic linker
1534 will only see the .dynsym symbol table, so there is no reason to
1535 look at .symtab for a dynamic object. */
1537 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
1538 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1540 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1542 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
1544 /* The sh_info field of the symtab header tells us where the
1545 external symbols start. We don't care about the local symbols at
1547 if (elf_bad_symtab (abfd
))
1549 extsymcount
= symcount
;
1554 extsymcount
= symcount
- hdr
->sh_info
;
1555 extsymoff
= hdr
->sh_info
;
1559 if (extsymcount
!= 0)
1561 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
1563 if (isymbuf
== NULL
)
1566 /* We store a pointer to the hash table entry for each external
1568 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
1569 sym_hash
= (struct elf_link_hash_entry
**) bfd_alloc (abfd
, amt
);
1570 if (sym_hash
== NULL
)
1571 goto error_free_sym
;
1572 elf_sym_hashes (abfd
) = sym_hash
;
1577 /* Read in any version definitions. */
1578 if (! _bfd_elf_slurp_version_tables (abfd
))
1579 goto error_free_sym
;
1581 /* Read in the symbol versions, but don't bother to convert them
1582 to internal format. */
1583 if (elf_dynversym (abfd
) != 0)
1585 Elf_Internal_Shdr
*versymhdr
;
1587 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
1588 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
1589 if (extversym
== NULL
)
1590 goto error_free_sym
;
1591 amt
= versymhdr
->sh_size
;
1592 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
1593 || bfd_bread ((PTR
) extversym
, amt
, abfd
) != amt
)
1594 goto error_free_vers
;
1600 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
1601 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
1603 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
1610 struct elf_link_hash_entry
*h
;
1611 bfd_boolean definition
;
1612 bfd_boolean size_change_ok
, type_change_ok
;
1613 bfd_boolean new_weakdef
;
1614 unsigned int old_alignment
;
1615 bfd_boolean override
;
1619 flags
= BSF_NO_FLAGS
;
1621 value
= isym
->st_value
;
1624 bind
= ELF_ST_BIND (isym
->st_info
);
1625 if (bind
== STB_LOCAL
)
1627 /* This should be impossible, since ELF requires that all
1628 global symbols follow all local symbols, and that sh_info
1629 point to the first global symbol. Unfortunatealy, Irix 5
1633 else if (bind
== STB_GLOBAL
)
1635 if (isym
->st_shndx
!= SHN_UNDEF
1636 && isym
->st_shndx
!= SHN_COMMON
)
1639 else if (bind
== STB_WEAK
)
1643 /* Leave it up to the processor backend. */
1646 if (isym
->st_shndx
== SHN_UNDEF
)
1647 sec
= bfd_und_section_ptr
;
1648 else if (isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
1650 sec
= section_from_elf_index (abfd
, isym
->st_shndx
);
1652 sec
= bfd_abs_section_ptr
;
1653 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
1656 else if (isym
->st_shndx
== SHN_ABS
)
1657 sec
= bfd_abs_section_ptr
;
1658 else if (isym
->st_shndx
== SHN_COMMON
)
1660 sec
= bfd_com_section_ptr
;
1661 /* What ELF calls the size we call the value. What ELF
1662 calls the value we call the alignment. */
1663 value
= isym
->st_size
;
1667 /* Leave it up to the processor backend. */
1670 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
1672 if (name
== (const char *) NULL
)
1673 goto error_free_vers
;
1675 if (isym
->st_shndx
== SHN_COMMON
1676 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
)
1678 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
1682 tcomm
= bfd_make_section (abfd
, ".tcommon");
1684 || !bfd_set_section_flags (abfd
, tcomm
, (SEC_ALLOC
1686 | SEC_LINKER_CREATED
1687 | SEC_THREAD_LOCAL
)))
1688 goto error_free_vers
;
1692 else if (add_symbol_hook
)
1694 if (! (*add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
, &sec
,
1696 goto error_free_vers
;
1698 /* The hook function sets the name to NULL if this symbol
1699 should be skipped for some reason. */
1700 if (name
== (const char *) NULL
)
1704 /* Sanity check that all possibilities were handled. */
1705 if (sec
== (asection
*) NULL
)
1707 bfd_set_error (bfd_error_bad_value
);
1708 goto error_free_vers
;
1711 if (bfd_is_und_section (sec
)
1712 || bfd_is_com_section (sec
))
1717 size_change_ok
= FALSE
;
1718 type_change_ok
= get_elf_backend_data (abfd
)->type_change_ok
;
1720 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1722 Elf_Internal_Versym iver
;
1723 unsigned int vernum
= 0;
1727 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
1728 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
1730 /* If this is a hidden symbol, or if it is not version
1731 1, we append the version name to the symbol name.
1732 However, we do not modify a non-hidden absolute
1733 symbol, because it might be the version symbol
1734 itself. FIXME: What if it isn't? */
1735 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
1736 || (vernum
> 1 && ! bfd_is_abs_section (sec
)))
1739 size_t namelen
, verlen
, newlen
;
1742 if (isym
->st_shndx
!= SHN_UNDEF
)
1744 if (vernum
> elf_tdata (abfd
)->dynverdef_hdr
.sh_info
)
1746 (*_bfd_error_handler
)
1747 (_("%s: %s: invalid version %u (max %d)"),
1748 bfd_archive_filename (abfd
), name
, vernum
,
1749 elf_tdata (abfd
)->dynverdef_hdr
.sh_info
);
1750 bfd_set_error (bfd_error_bad_value
);
1751 goto error_free_vers
;
1753 else if (vernum
> 1)
1755 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1761 /* We cannot simply test for the number of
1762 entries in the VERNEED section since the
1763 numbers for the needed versions do not start
1765 Elf_Internal_Verneed
*t
;
1768 for (t
= elf_tdata (abfd
)->verref
;
1772 Elf_Internal_Vernaux
*a
;
1774 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1776 if (a
->vna_other
== vernum
)
1778 verstr
= a
->vna_nodename
;
1787 (*_bfd_error_handler
)
1788 (_("%s: %s: invalid needed version %d"),
1789 bfd_archive_filename (abfd
), name
, vernum
);
1790 bfd_set_error (bfd_error_bad_value
);
1791 goto error_free_vers
;
1795 namelen
= strlen (name
);
1796 verlen
= strlen (verstr
);
1797 newlen
= namelen
+ verlen
+ 2;
1798 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
1799 && isym
->st_shndx
!= SHN_UNDEF
)
1802 newname
= (char *) bfd_alloc (abfd
, (bfd_size_type
) newlen
);
1803 if (newname
== NULL
)
1804 goto error_free_vers
;
1805 memcpy (newname
, name
, namelen
);
1806 p
= newname
+ namelen
;
1808 /* If this is a defined non-hidden version symbol,
1809 we add another @ to the name. This indicates the
1810 default version of the symbol. */
1811 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
1812 && isym
->st_shndx
!= SHN_UNDEF
)
1814 memcpy (p
, verstr
, verlen
+ 1);
1820 if (! elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
1821 sym_hash
, &override
, &type_change_ok
,
1822 &size_change_ok
, dt_needed
))
1823 goto error_free_vers
;
1829 while (h
->root
.type
== bfd_link_hash_indirect
1830 || h
->root
.type
== bfd_link_hash_warning
)
1831 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1833 /* Remember the old alignment if this is a common symbol, so
1834 that we don't reduce the alignment later on. We can't
1835 check later, because _bfd_generic_link_add_one_symbol
1836 will set a default for the alignment which we want to
1838 if (h
->root
.type
== bfd_link_hash_common
)
1839 old_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1841 if (elf_tdata (abfd
)->verdef
!= NULL
1845 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
1848 if (! (_bfd_generic_link_add_one_symbol
1849 (info
, abfd
, name
, flags
, sec
, value
, (const char *) NULL
,
1850 FALSE
, collect
, (struct bfd_link_hash_entry
**) sym_hash
)))
1851 goto error_free_vers
;
1854 while (h
->root
.type
== bfd_link_hash_indirect
1855 || h
->root
.type
== bfd_link_hash_warning
)
1856 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1859 new_weakdef
= FALSE
;
1862 && (flags
& BSF_WEAK
) != 0
1863 && ELF_ST_TYPE (isym
->st_info
) != STT_FUNC
1864 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
1865 && h
->weakdef
== NULL
)
1867 /* Keep a list of all weak defined non function symbols from
1868 a dynamic object, using the weakdef field. Later in this
1869 function we will set the weakdef field to the correct
1870 value. We only put non-function symbols from dynamic
1871 objects on this list, because that happens to be the only
1872 time we need to know the normal symbol corresponding to a
1873 weak symbol, and the information is time consuming to
1874 figure out. If the weakdef field is not already NULL,
1875 then this symbol was already defined by some previous
1876 dynamic object, and we will be using that previous
1877 definition anyhow. */
1884 /* Set the alignment of a common symbol. */
1885 if (isym
->st_shndx
== SHN_COMMON
1886 && h
->root
.type
== bfd_link_hash_common
)
1890 align
= bfd_log2 (isym
->st_value
);
1891 if (align
> old_alignment
1892 /* Permit an alignment power of zero if an alignment of one
1893 is specified and no other alignments have been specified. */
1894 || (isym
->st_value
== 1 && old_alignment
== 0))
1895 h
->root
.u
.c
.p
->alignment_power
= align
;
1898 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1904 /* Remember the symbol size and type. */
1905 if (isym
->st_size
!= 0
1906 && (definition
|| h
->size
== 0))
1908 if (h
->size
!= 0 && h
->size
!= isym
->st_size
&& ! size_change_ok
)
1909 (*_bfd_error_handler
)
1910 (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"),
1911 name
, (unsigned long) h
->size
,
1912 (unsigned long) isym
->st_size
, bfd_archive_filename (abfd
));
1914 h
->size
= isym
->st_size
;
1917 /* If this is a common symbol, then we always want H->SIZE
1918 to be the size of the common symbol. The code just above
1919 won't fix the size if a common symbol becomes larger. We
1920 don't warn about a size change here, because that is
1921 covered by --warn-common. */
1922 if (h
->root
.type
== bfd_link_hash_common
)
1923 h
->size
= h
->root
.u
.c
.size
;
1925 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
1926 && (definition
|| h
->type
== STT_NOTYPE
))
1928 if (h
->type
!= STT_NOTYPE
1929 && h
->type
!= ELF_ST_TYPE (isym
->st_info
)
1930 && ! type_change_ok
)
1931 (*_bfd_error_handler
)
1932 (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
1933 name
, h
->type
, ELF_ST_TYPE (isym
->st_info
),
1934 bfd_archive_filename (abfd
));
1936 h
->type
= ELF_ST_TYPE (isym
->st_info
);
1939 /* If st_other has a processor-specific meaning, specific code
1940 might be needed here. */
1941 if (isym
->st_other
!= 0)
1943 unsigned char hvis
, symvis
, other
;
1945 /* Take the balance of OTHER from the definition. */
1946 other
= (definition
? isym
->st_other
: h
->other
);
1947 other
&= ~ ELF_ST_VISIBILITY (-1);
1949 /* Combine visibilities, using the most constraining one. */
1950 hvis
= ELF_ST_VISIBILITY (h
->other
);
1951 symvis
= ELF_ST_VISIBILITY (isym
->st_other
);
1953 h
->other
= other
| (hvis
> symvis
? hvis
: symvis
);
1956 /* Set a flag in the hash table entry indicating the type of
1957 reference or definition we just found. Keep a count of
1958 the number of dynamic symbols we find. A dynamic symbol
1959 is one which is referenced or defined by both a regular
1960 object and a shared object. */
1961 old_flags
= h
->elf_link_hash_flags
;
1967 new_flag
= ELF_LINK_HASH_REF_REGULAR
;
1968 if (bind
!= STB_WEAK
)
1969 new_flag
|= ELF_LINK_HASH_REF_REGULAR_NONWEAK
;
1972 new_flag
= ELF_LINK_HASH_DEF_REGULAR
;
1974 || (old_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
1975 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0)
1981 new_flag
= ELF_LINK_HASH_REF_DYNAMIC
;
1983 new_flag
= ELF_LINK_HASH_DEF_DYNAMIC
;
1984 if ((old_flags
& (ELF_LINK_HASH_DEF_REGULAR
1985 | ELF_LINK_HASH_REF_REGULAR
)) != 0
1986 || (h
->weakdef
!= NULL
1988 && h
->weakdef
->dynindx
!= -1))
1992 h
->elf_link_hash_flags
|= new_flag
;
1994 /* Check to see if we need to add an indirect symbol for
1995 the default name. */
1996 if (definition
|| h
->root
.type
== bfd_link_hash_common
)
1997 if (! elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
1998 &sec
, &value
, &dynsym
,
1999 override
, dt_needed
))
2000 goto error_free_vers
;
2002 if (definition
&& (abfd
->flags
& DYNAMIC
) == 0)
2004 char *p
= strchr (name
, ELF_VER_CHR
);
2005 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
2007 /* Queue non-default versions so that .symver x, x@FOO
2008 aliases can be checked. */
2009 if (! nondeflt_vers
)
2011 amt
= (isymend
- isym
+ 1)
2012 * sizeof (struct elf_link_hash_entry
*);
2013 nondeflt_vers
= bfd_malloc (amt
);
2015 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
2019 if (dynsym
&& h
->dynindx
== -1)
2021 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2022 goto error_free_vers
;
2023 if (h
->weakdef
!= NULL
2025 && h
->weakdef
->dynindx
== -1)
2027 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
->weakdef
))
2028 goto error_free_vers
;
2031 else if (dynsym
&& h
->dynindx
!= -1)
2032 /* If the symbol already has a dynamic index, but
2033 visibility says it should not be visible, turn it into
2035 switch (ELF_ST_VISIBILITY (h
->other
))
2039 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
2043 if (dt_needed
&& definition
2044 && (h
->elf_link_hash_flags
2045 & ELF_LINK_HASH_REF_REGULAR
) != 0)
2047 bfd_size_type oldsize
;
2048 bfd_size_type strindex
;
2050 if (! is_elf_hash_table (info
))
2051 goto error_free_vers
;
2053 /* The symbol from a DT_NEEDED object is referenced from
2054 the regular object to create a dynamic executable. We
2055 have to make sure there is a DT_NEEDED entry for it. */
2058 oldsize
= _bfd_elf_strtab_size (hash_table
->dynstr
);
2059 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
,
2060 elf_dt_soname (abfd
), FALSE
);
2061 if (strindex
== (bfd_size_type
) -1)
2062 goto error_free_vers
;
2064 if (oldsize
== _bfd_elf_strtab_size (hash_table
->dynstr
))
2067 Elf_External_Dyn
*dyncon
, *dynconend
;
2069 sdyn
= bfd_get_section_by_name (hash_table
->dynobj
,
2071 BFD_ASSERT (sdyn
!= NULL
);
2073 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
2074 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
2076 for (; dyncon
< dynconend
; dyncon
++)
2078 Elf_Internal_Dyn dyn
;
2080 elf_swap_dyn_in (hash_table
->dynobj
,
2082 BFD_ASSERT (dyn
.d_tag
!= DT_NEEDED
||
2083 dyn
.d_un
.d_val
!= strindex
);
2087 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_NEEDED
, strindex
))
2088 goto error_free_vers
;
2093 /* Now that all the symbols from this input file are created, handle
2094 .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */
2095 if (nondeflt_vers
!= NULL
)
2097 bfd_size_type cnt
, symidx
;
2099 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
2101 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
2102 char *shortname
, *p
;
2104 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
2106 || (h
->root
.type
!= bfd_link_hash_defined
2107 && h
->root
.type
!= bfd_link_hash_defweak
))
2110 amt
= p
- h
->root
.root
.string
;
2111 shortname
= bfd_malloc (amt
+ 1);
2112 memcpy (shortname
, h
->root
.root
.string
, amt
);
2113 shortname
[amt
] = '\0';
2115 hi
= (struct elf_link_hash_entry
*)
2116 bfd_link_hash_lookup (info
->hash
, shortname
,
2117 FALSE
, FALSE
, FALSE
);
2119 && hi
->root
.type
== h
->root
.type
2120 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
2121 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
2123 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
2124 hi
->root
.type
= bfd_link_hash_indirect
;
2125 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
2126 (*bed
->elf_backend_copy_indirect_symbol
) (bed
, h
, hi
);
2127 sym_hash
= elf_sym_hashes (abfd
);
2129 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
2130 if (sym_hash
[symidx
] == hi
)
2132 sym_hash
[symidx
] = h
;
2138 free (nondeflt_vers
);
2139 nondeflt_vers
= NULL
;
2142 if (extversym
!= NULL
)
2148 if (isymbuf
!= NULL
)
2152 /* Now set the weakdefs field correctly for all the weak defined
2153 symbols we found. The only way to do this is to search all the
2154 symbols. Since we only need the information for non functions in
2155 dynamic objects, that's the only time we actually put anything on
2156 the list WEAKS. We need this information so that if a regular
2157 object refers to a symbol defined weakly in a dynamic object, the
2158 real symbol in the dynamic object is also put in the dynamic
2159 symbols; we also must arrange for both symbols to point to the
2160 same memory location. We could handle the general case of symbol
2161 aliasing, but a general symbol alias can only be generated in
2162 assembler code, handling it correctly would be very time
2163 consuming, and other ELF linkers don't handle general aliasing
2165 while (weaks
!= NULL
)
2167 struct elf_link_hash_entry
*hlook
;
2170 struct elf_link_hash_entry
**hpp
;
2171 struct elf_link_hash_entry
**hppend
;
2174 weaks
= hlook
->weakdef
;
2175 hlook
->weakdef
= NULL
;
2177 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
2178 || hlook
->root
.type
== bfd_link_hash_defweak
2179 || hlook
->root
.type
== bfd_link_hash_common
2180 || hlook
->root
.type
== bfd_link_hash_indirect
);
2181 slook
= hlook
->root
.u
.def
.section
;
2182 vlook
= hlook
->root
.u
.def
.value
;
2184 hpp
= elf_sym_hashes (abfd
);
2185 hppend
= hpp
+ extsymcount
;
2186 for (; hpp
< hppend
; hpp
++)
2188 struct elf_link_hash_entry
*h
;
2191 if (h
!= NULL
&& h
!= hlook
2192 && h
->root
.type
== bfd_link_hash_defined
2193 && h
->root
.u
.def
.section
== slook
2194 && h
->root
.u
.def
.value
== vlook
)
2198 /* If the weak definition is in the list of dynamic
2199 symbols, make sure the real definition is put there
2201 if (hlook
->dynindx
!= -1
2202 && h
->dynindx
== -1)
2204 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2208 /* If the real definition is in the list of dynamic
2209 symbols, make sure the weak definition is put there
2210 as well. If we don't do this, then the dynamic
2211 loader might not merge the entries for the real
2212 definition and the weak definition. */
2213 if (h
->dynindx
!= -1
2214 && hlook
->dynindx
== -1)
2216 if (! _bfd_elf_link_record_dynamic_symbol (info
, hlook
))
2224 /* If this object is the same format as the output object, and it is
2225 not a shared library, then let the backend look through the
2228 This is required to build global offset table entries and to
2229 arrange for dynamic relocs. It is not required for the
2230 particular common case of linking non PIC code, even when linking
2231 against shared libraries, but unfortunately there is no way of
2232 knowing whether an object file has been compiled PIC or not.
2233 Looking through the relocs is not particularly time consuming.
2234 The problem is that we must either (1) keep the relocs in memory,
2235 which causes the linker to require additional runtime memory or
2236 (2) read the relocs twice from the input file, which wastes time.
2237 This would be a good case for using mmap.
2239 I have no idea how to handle linking PIC code into a file of a
2240 different format. It probably can't be done. */
2241 check_relocs
= get_elf_backend_data (abfd
)->check_relocs
;
2243 && abfd
->xvec
== info
->hash
->creator
2244 && check_relocs
!= NULL
)
2248 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2250 Elf_Internal_Rela
*internal_relocs
;
2253 if ((o
->flags
& SEC_RELOC
) == 0
2254 || o
->reloc_count
== 0
2255 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
2256 && (o
->flags
& SEC_DEBUGGING
) != 0)
2257 || bfd_is_abs_section (o
->output_section
))
2260 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
2261 (abfd
, o
, (PTR
) NULL
,
2262 (Elf_Internal_Rela
*) NULL
,
2263 info
->keep_memory
));
2264 if (internal_relocs
== NULL
)
2267 ok
= (*check_relocs
) (abfd
, info
, o
, internal_relocs
);
2269 if (elf_section_data (o
)->relocs
!= internal_relocs
)
2270 free (internal_relocs
);
2277 /* If this is a non-traditional link, try to optimize the handling
2278 of the .stab/.stabstr sections. */
2280 && ! info
->traditional_format
2281 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
2282 && is_elf_hash_table (info
)
2283 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
2285 asection
*stab
, *stabstr
;
2287 stab
= bfd_get_section_by_name (abfd
, ".stab");
2289 && (stab
->flags
& SEC_MERGE
) == 0
2290 && !bfd_is_abs_section (stab
->output_section
))
2292 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
2294 if (stabstr
!= NULL
)
2296 struct bfd_elf_section_data
*secdata
;
2298 secdata
= elf_section_data (stab
);
2299 if (! _bfd_link_section_stabs (abfd
,
2300 & hash_table
->stab_info
,
2302 &secdata
->sec_info
))
2304 if (secdata
->sec_info
)
2305 stab
->sec_info_type
= ELF_INFO_TYPE_STABS
;
2310 if (! info
->relocateable
&& ! dynamic
2311 && is_elf_hash_table (info
))
2315 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2316 if ((s
->flags
& SEC_MERGE
) != 0
2317 && !bfd_is_abs_section (s
->output_section
))
2319 struct bfd_elf_section_data
*secdata
;
2321 secdata
= elf_section_data (s
);
2322 if (! _bfd_merge_section (abfd
,
2323 & hash_table
->merge_info
,
2324 s
, &secdata
->sec_info
))
2326 else if (secdata
->sec_info
)
2327 s
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
2331 if (is_elf_hash_table (info
))
2333 /* Add this bfd to the loaded list. */
2334 struct elf_link_loaded_list
*n
;
2336 n
= ((struct elf_link_loaded_list
*)
2337 bfd_alloc (abfd
, sizeof (struct elf_link_loaded_list
)));
2341 n
->next
= hash_table
->loaded
;
2342 hash_table
->loaded
= n
;
2348 if (nondeflt_vers
!= NULL
)
2349 free (nondeflt_vers
);
2350 if (extversym
!= NULL
)
2353 if (isymbuf
!= NULL
)
2359 /* Create some sections which will be filled in with dynamic linking
2360 information. ABFD is an input file which requires dynamic sections
2361 to be created. The dynamic sections take up virtual memory space
2362 when the final executable is run, so we need to create them before
2363 addresses are assigned to the output sections. We work out the
2364 actual contents and size of these sections later. */
2367 elf_link_create_dynamic_sections (abfd
, info
)
2369 struct bfd_link_info
*info
;
2372 register asection
*s
;
2373 struct elf_link_hash_entry
*h
;
2374 struct bfd_link_hash_entry
*bh
;
2375 struct elf_backend_data
*bed
;
2377 if (! is_elf_hash_table (info
))
2380 if (elf_hash_table (info
)->dynamic_sections_created
)
2383 /* Make sure that all dynamic sections use the same input BFD. */
2384 if (elf_hash_table (info
)->dynobj
== NULL
)
2385 elf_hash_table (info
)->dynobj
= abfd
;
2387 abfd
= elf_hash_table (info
)->dynobj
;
2389 /* Note that we set the SEC_IN_MEMORY flag for all of these
2391 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
2392 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2394 /* A dynamically linked executable has a .interp section, but a
2395 shared library does not. */
2398 s
= bfd_make_section (abfd
, ".interp");
2400 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
2404 if (! info
->traditional_format
2405 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
2407 s
= bfd_make_section (abfd
, ".eh_frame_hdr");
2409 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2410 || ! bfd_set_section_alignment (abfd
, s
, 2))
2412 elf_hash_table (info
)->eh_info
.hdr_sec
= s
;
2415 /* Create sections to hold version informations. These are removed
2416 if they are not needed. */
2417 s
= bfd_make_section (abfd
, ".gnu.version_d");
2419 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2420 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2423 s
= bfd_make_section (abfd
, ".gnu.version");
2425 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2426 || ! bfd_set_section_alignment (abfd
, s
, 1))
2429 s
= bfd_make_section (abfd
, ".gnu.version_r");
2431 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2432 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2435 s
= bfd_make_section (abfd
, ".dynsym");
2437 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2438 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2441 s
= bfd_make_section (abfd
, ".dynstr");
2443 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
2446 /* Create a strtab to hold the dynamic symbol names. */
2447 if (elf_hash_table (info
)->dynstr
== NULL
)
2449 elf_hash_table (info
)->dynstr
= _bfd_elf_strtab_init ();
2450 if (elf_hash_table (info
)->dynstr
== NULL
)
2454 s
= bfd_make_section (abfd
, ".dynamic");
2456 || ! bfd_set_section_flags (abfd
, s
, flags
)
2457 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2460 /* The special symbol _DYNAMIC is always set to the start of the
2461 .dynamic section. This call occurs before we have processed the
2462 symbols for any dynamic object, so we don't have to worry about
2463 overriding a dynamic definition. We could set _DYNAMIC in a
2464 linker script, but we only want to define it if we are, in fact,
2465 creating a .dynamic section. We don't want to define it if there
2466 is no .dynamic section, since on some ELF platforms the start up
2467 code examines it to decide how to initialize the process. */
2469 if (! (_bfd_generic_link_add_one_symbol
2470 (info
, abfd
, "_DYNAMIC", BSF_GLOBAL
, s
, (bfd_vma
) 0,
2471 (const char *) 0, FALSE
, get_elf_backend_data (abfd
)->collect
, &bh
)))
2473 h
= (struct elf_link_hash_entry
*) bh
;
2474 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2475 h
->type
= STT_OBJECT
;
2478 && ! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2481 bed
= get_elf_backend_data (abfd
);
2483 s
= bfd_make_section (abfd
, ".hash");
2485 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2486 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2488 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
2490 /* Let the backend create the rest of the sections. This lets the
2491 backend set the right flags. The backend will normally create
2492 the .got and .plt sections. */
2493 if (! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
2496 elf_hash_table (info
)->dynamic_sections_created
= TRUE
;
2501 /* Add an entry to the .dynamic table. */
2504 elf_add_dynamic_entry (info
, tag
, val
)
2505 struct bfd_link_info
*info
;
2509 Elf_Internal_Dyn dyn
;
2512 bfd_size_type newsize
;
2513 bfd_byte
*newcontents
;
2515 if (! is_elf_hash_table (info
))
2518 dynobj
= elf_hash_table (info
)->dynobj
;
2520 s
= bfd_get_section_by_name (dynobj
, ".dynamic");
2521 BFD_ASSERT (s
!= NULL
);
2523 newsize
= s
->_raw_size
+ sizeof (Elf_External_Dyn
);
2524 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
2525 if (newcontents
== NULL
)
2529 dyn
.d_un
.d_val
= val
;
2530 elf_swap_dyn_out (dynobj
, &dyn
,
2531 (Elf_External_Dyn
*) (newcontents
+ s
->_raw_size
));
2533 s
->_raw_size
= newsize
;
2534 s
->contents
= newcontents
;
2539 /* Read and swap the relocs from the section indicated by SHDR. This
2540 may be either a REL or a RELA section. The relocations are
2541 translated into RELA relocations and stored in INTERNAL_RELOCS,
2542 which should have already been allocated to contain enough space.
2543 The EXTERNAL_RELOCS are a buffer where the external form of the
2544 relocations should be stored.
2546 Returns FALSE if something goes wrong. */
2549 elf_link_read_relocs_from_section (abfd
, shdr
, external_relocs
,
2552 Elf_Internal_Shdr
*shdr
;
2553 PTR external_relocs
;
2554 Elf_Internal_Rela
*internal_relocs
;
2556 struct elf_backend_data
*bed
;
2557 void (*swap_in
) PARAMS ((bfd
*, const bfd_byte
*, Elf_Internal_Rela
*));
2558 const bfd_byte
*erela
;
2559 const bfd_byte
*erelaend
;
2560 Elf_Internal_Rela
*irela
;
2562 /* If there aren't any relocations, that's OK. */
2566 /* Position ourselves at the start of the section. */
2567 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2570 /* Read the relocations. */
2571 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2574 bed
= get_elf_backend_data (abfd
);
2576 /* Convert the external relocations to the internal format. */
2577 if (shdr
->sh_entsize
== sizeof (Elf_External_Rel
))
2578 swap_in
= bed
->s
->swap_reloc_in
;
2579 else if (shdr
->sh_entsize
== sizeof (Elf_External_Rela
))
2580 swap_in
= bed
->s
->swap_reloca_in
;
2584 erela
= external_relocs
;
2585 erelaend
= erela
+ NUM_SHDR_ENTRIES (shdr
) * shdr
->sh_entsize
;
2586 irela
= internal_relocs
;
2587 while (erela
< erelaend
)
2589 (*swap_in
) (abfd
, erela
, irela
);
2590 irela
+= bed
->s
->int_rels_per_ext_rel
;
2591 erela
+= shdr
->sh_entsize
;
2597 /* Read and swap the relocs for a section O. They may have been
2598 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2599 not NULL, they are used as buffers to read into. They are known to
2600 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2601 the return value is allocated using either malloc or bfd_alloc,
2602 according to the KEEP_MEMORY argument. If O has two relocation
2603 sections (both REL and RELA relocations), then the REL_HDR
2604 relocations will appear first in INTERNAL_RELOCS, followed by the
2605 REL_HDR2 relocations. */
2608 NAME(_bfd_elf
,link_read_relocs
) (abfd
, o
, external_relocs
, internal_relocs
,
2612 PTR external_relocs
;
2613 Elf_Internal_Rela
*internal_relocs
;
2614 bfd_boolean keep_memory
;
2616 Elf_Internal_Shdr
*rel_hdr
;
2618 Elf_Internal_Rela
*alloc2
= NULL
;
2619 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2621 if (elf_section_data (o
)->relocs
!= NULL
)
2622 return elf_section_data (o
)->relocs
;
2624 if (o
->reloc_count
== 0)
2627 rel_hdr
= &elf_section_data (o
)->rel_hdr
;
2629 if (internal_relocs
== NULL
)
2633 size
= o
->reloc_count
;
2634 size
*= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
2636 internal_relocs
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2638 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2639 if (internal_relocs
== NULL
)
2643 if (external_relocs
== NULL
)
2645 bfd_size_type size
= rel_hdr
->sh_size
;
2647 if (elf_section_data (o
)->rel_hdr2
)
2648 size
+= elf_section_data (o
)->rel_hdr2
->sh_size
;
2649 alloc1
= (PTR
) bfd_malloc (size
);
2652 external_relocs
= alloc1
;
2655 if (!elf_link_read_relocs_from_section (abfd
, rel_hdr
,
2659 if (!elf_link_read_relocs_from_section
2661 elf_section_data (o
)->rel_hdr2
,
2662 ((bfd_byte
*) external_relocs
) + rel_hdr
->sh_size
,
2663 internal_relocs
+ (NUM_SHDR_ENTRIES (rel_hdr
)
2664 * bed
->s
->int_rels_per_ext_rel
)))
2667 /* Cache the results for next time, if we can. */
2669 elf_section_data (o
)->relocs
= internal_relocs
;
2674 /* Don't free alloc2, since if it was allocated we are passing it
2675 back (under the name of internal_relocs). */
2677 return internal_relocs
;
2687 /* Record an assignment to a symbol made by a linker script. We need
2688 this in case some dynamic object refers to this symbol. */
2691 NAME(bfd_elf
,record_link_assignment
) (output_bfd
, info
, name
, provide
)
2692 bfd
*output_bfd ATTRIBUTE_UNUSED
;
2693 struct bfd_link_info
*info
;
2695 bfd_boolean provide
;
2697 struct elf_link_hash_entry
*h
;
2699 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2702 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, TRUE
, TRUE
, FALSE
);
2706 if (h
->root
.type
== bfd_link_hash_new
)
2707 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_ELF
;
2709 /* If this symbol is being provided by the linker script, and it is
2710 currently defined by a dynamic object, but not by a regular
2711 object, then mark it as undefined so that the generic linker will
2712 force the correct value. */
2714 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2715 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2716 h
->root
.type
= bfd_link_hash_undefined
;
2718 /* If this symbol is not being provided by the linker script, and it is
2719 currently defined by a dynamic object, but not by a regular object,
2720 then clear out any version information because the symbol will not be
2721 associated with the dynamic object any more. */
2723 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2724 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2725 h
->verinfo
.verdef
= NULL
;
2727 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2729 if (((h
->elf_link_hash_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
2730 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0
2732 && h
->dynindx
== -1)
2734 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2737 /* If this is a weak defined symbol, and we know a corresponding
2738 real symbol from the same dynamic object, make sure the real
2739 symbol is also made into a dynamic symbol. */
2740 if (h
->weakdef
!= NULL
2741 && h
->weakdef
->dynindx
== -1)
2743 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
->weakdef
))
2751 /* This structure is used to pass information to
2752 elf_link_assign_sym_version. */
2754 struct elf_assign_sym_version_info
2758 /* General link information. */
2759 struct bfd_link_info
*info
;
2761 struct bfd_elf_version_tree
*verdefs
;
2762 /* Whether we had a failure. */
2766 /* This structure is used to pass information to
2767 elf_link_find_version_dependencies. */
2769 struct elf_find_verdep_info
2773 /* General link information. */
2774 struct bfd_link_info
*info
;
2775 /* The number of dependencies. */
2777 /* Whether we had a failure. */
2781 /* Array used to determine the number of hash table buckets to use
2782 based on the number of symbols there are. If there are fewer than
2783 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
2784 fewer than 37 we use 17 buckets, and so forth. We never use more
2785 than 32771 buckets. */
2787 static const size_t elf_buckets
[] =
2789 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
2793 /* Compute bucket count for hashing table. We do not use a static set
2794 of possible tables sizes anymore. Instead we determine for all
2795 possible reasonable sizes of the table the outcome (i.e., the
2796 number of collisions etc) and choose the best solution. The
2797 weighting functions are not too simple to allow the table to grow
2798 without bounds. Instead one of the weighting factors is the size.
2799 Therefore the result is always a good payoff between few collisions
2800 (= short chain lengths) and table size. */
2802 compute_bucket_count (info
)
2803 struct bfd_link_info
*info
;
2805 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
2806 size_t best_size
= 0;
2807 unsigned long int *hashcodes
;
2808 unsigned long int *hashcodesp
;
2809 unsigned long int i
;
2812 /* Compute the hash values for all exported symbols. At the same
2813 time store the values in an array so that we could use them for
2816 amt
*= sizeof (unsigned long int);
2817 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
2818 if (hashcodes
== NULL
)
2820 hashcodesp
= hashcodes
;
2822 /* Put all hash values in HASHCODES. */
2823 elf_link_hash_traverse (elf_hash_table (info
),
2824 elf_collect_hash_codes
, &hashcodesp
);
2826 /* We have a problem here. The following code to optimize the table
2827 size requires an integer type with more the 32 bits. If
2828 BFD_HOST_U_64_BIT is set we know about such a type. */
2829 #ifdef BFD_HOST_U_64_BIT
2832 unsigned long int nsyms
= hashcodesp
- hashcodes
;
2835 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
2836 unsigned long int *counts
;
2838 /* Possible optimization parameters: if we have NSYMS symbols we say
2839 that the hashing table must at least have NSYMS/4 and at most
2841 minsize
= nsyms
/ 4;
2844 best_size
= maxsize
= nsyms
* 2;
2846 /* Create array where we count the collisions in. We must use bfd_malloc
2847 since the size could be large. */
2849 amt
*= sizeof (unsigned long int);
2850 counts
= (unsigned long int *) bfd_malloc (amt
);
2857 /* Compute the "optimal" size for the hash table. The criteria is a
2858 minimal chain length. The minor criteria is (of course) the size
2860 for (i
= minsize
; i
< maxsize
; ++i
)
2862 /* Walk through the array of hashcodes and count the collisions. */
2863 BFD_HOST_U_64_BIT max
;
2864 unsigned long int j
;
2865 unsigned long int fact
;
2867 memset (counts
, '\0', i
* sizeof (unsigned long int));
2869 /* Determine how often each hash bucket is used. */
2870 for (j
= 0; j
< nsyms
; ++j
)
2871 ++counts
[hashcodes
[j
] % i
];
2873 /* For the weight function we need some information about the
2874 pagesize on the target. This is information need not be 100%
2875 accurate. Since this information is not available (so far) we
2876 define it here to a reasonable default value. If it is crucial
2877 to have a better value some day simply define this value. */
2878 # ifndef BFD_TARGET_PAGESIZE
2879 # define BFD_TARGET_PAGESIZE (4096)
2882 /* We in any case need 2 + NSYMS entries for the size values and
2884 max
= (2 + nsyms
) * (ARCH_SIZE
/ 8);
2887 /* Variant 1: optimize for short chains. We add the squares
2888 of all the chain lengths (which favous many small chain
2889 over a few long chains). */
2890 for (j
= 0; j
< i
; ++j
)
2891 max
+= counts
[j
] * counts
[j
];
2893 /* This adds penalties for the overall size of the table. */
2894 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2897 /* Variant 2: Optimize a lot more for small table. Here we
2898 also add squares of the size but we also add penalties for
2899 empty slots (the +1 term). */
2900 for (j
= 0; j
< i
; ++j
)
2901 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
2903 /* The overall size of the table is considered, but not as
2904 strong as in variant 1, where it is squared. */
2905 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2909 /* Compare with current best results. */
2910 if (max
< best_chlen
)
2920 #endif /* defined (BFD_HOST_U_64_BIT) */
2922 /* This is the fallback solution if no 64bit type is available or if we
2923 are not supposed to spend much time on optimizations. We select the
2924 bucket count using a fixed set of numbers. */
2925 for (i
= 0; elf_buckets
[i
] != 0; i
++)
2927 best_size
= elf_buckets
[i
];
2928 if (dynsymcount
< elf_buckets
[i
+ 1])
2933 /* Free the arrays we needed. */
2939 /* Set up the sizes and contents of the ELF dynamic sections. This is
2940 called by the ELF linker emulation before_allocation routine. We
2941 must set the sizes of the sections before the linker sets the
2942 addresses of the various sections. */
2945 NAME(bfd_elf
,size_dynamic_sections
) (output_bfd
, soname
, rpath
,
2947 auxiliary_filters
, info
, sinterpptr
,
2952 const char *filter_shlib
;
2953 const char * const *auxiliary_filters
;
2954 struct bfd_link_info
*info
;
2955 asection
**sinterpptr
;
2956 struct bfd_elf_version_tree
*verdefs
;
2958 bfd_size_type soname_indx
;
2960 struct elf_backend_data
*bed
;
2961 struct elf_assign_sym_version_info asvinfo
;
2965 soname_indx
= (bfd_size_type
) -1;
2967 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2970 if (! is_elf_hash_table (info
))
2973 /* Any syms created from now on start with -1 in
2974 got.refcount/offset and plt.refcount/offset. */
2975 elf_hash_table (info
)->init_refcount
= elf_hash_table (info
)->init_offset
;
2977 /* The backend may have to create some sections regardless of whether
2978 we're dynamic or not. */
2979 bed
= get_elf_backend_data (output_bfd
);
2980 if (bed
->elf_backend_always_size_sections
2981 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
2984 dynobj
= elf_hash_table (info
)->dynobj
;
2986 /* If there were no dynamic objects in the link, there is nothing to
2991 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
2994 if (elf_hash_table (info
)->dynamic_sections_created
)
2996 struct elf_info_failed eif
;
2997 struct elf_link_hash_entry
*h
;
2999 struct bfd_elf_version_tree
*t
;
3000 struct bfd_elf_version_expr
*d
;
3001 bfd_boolean all_defined
;
3003 *sinterpptr
= bfd_get_section_by_name (dynobj
, ".interp");
3004 BFD_ASSERT (*sinterpptr
!= NULL
|| info
->shared
);
3008 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3010 if (soname_indx
== (bfd_size_type
) -1
3011 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SONAME
,
3018 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SYMBOLIC
,
3021 info
->flags
|= DF_SYMBOLIC
;
3028 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
3030 if (info
->new_dtags
)
3031 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
, indx
);
3032 if (indx
== (bfd_size_type
) -1
3033 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_RPATH
, indx
)
3035 && ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_RUNPATH
,
3040 if (filter_shlib
!= NULL
)
3044 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3045 filter_shlib
, TRUE
);
3046 if (indx
== (bfd_size_type
) -1
3047 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FILTER
, indx
))
3051 if (auxiliary_filters
!= NULL
)
3053 const char * const *p
;
3055 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
3059 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3061 if (indx
== (bfd_size_type
) -1
3062 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_AUXILIARY
,
3069 eif
.verdefs
= verdefs
;
3072 /* If we are supposed to export all symbols into the dynamic symbol
3073 table (this is not the normal case), then do so. */
3074 if (info
->export_dynamic
)
3076 elf_link_hash_traverse (elf_hash_table (info
), elf_export_symbol
,
3082 /* Make all global versions with definiton. */
3083 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3084 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3085 if (!d
->symver
&& strchr (d
->pattern
, '*') == NULL
)
3087 const char *verstr
, *name
;
3088 size_t namelen
, verlen
, newlen
;
3090 struct elf_link_hash_entry
*newh
;
3093 namelen
= strlen (name
);
3095 verlen
= strlen (verstr
);
3096 newlen
= namelen
+ verlen
+ 3;
3098 newname
= (char *) bfd_malloc ((bfd_size_type
) newlen
);
3099 if (newname
== NULL
)
3101 memcpy (newname
, name
, namelen
);
3103 /* Check the hidden versioned definition. */
3104 p
= newname
+ namelen
;
3106 memcpy (p
, verstr
, verlen
+ 1);
3107 newh
= elf_link_hash_lookup (elf_hash_table (info
),
3108 newname
, FALSE
, FALSE
,
3111 || (newh
->root
.type
!= bfd_link_hash_defined
3112 && newh
->root
.type
!= bfd_link_hash_defweak
))
3114 /* Check the default versioned definition. */
3116 memcpy (p
, verstr
, verlen
+ 1);
3117 newh
= elf_link_hash_lookup (elf_hash_table (info
),
3118 newname
, FALSE
, FALSE
,
3123 /* Mark this version if there is a definition and it is
3124 not defined in a shared object. */
3126 && ((newh
->elf_link_hash_flags
3127 & ELF_LINK_HASH_DEF_DYNAMIC
) == 0)
3128 && (newh
->root
.type
== bfd_link_hash_defined
3129 || newh
->root
.type
== bfd_link_hash_defweak
))
3133 /* Attach all the symbols to their version information. */
3134 asvinfo
.output_bfd
= output_bfd
;
3135 asvinfo
.info
= info
;
3136 asvinfo
.verdefs
= verdefs
;
3137 asvinfo
.failed
= FALSE
;
3139 elf_link_hash_traverse (elf_hash_table (info
),
3140 elf_link_assign_sym_version
,
3145 if (!info
->allow_undefined_version
)
3147 /* Check if all global versions have a definiton. */
3149 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3150 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3151 if (!d
->symver
&& !d
->script
3152 && strchr (d
->pattern
, '*') == NULL
)
3154 (*_bfd_error_handler
)
3155 (_("%s: undefined version: %s"),
3156 d
->pattern
, t
->name
);
3157 all_defined
= FALSE
;
3162 bfd_set_error (bfd_error_bad_value
);
3167 /* Find all symbols which were defined in a dynamic object and make
3168 the backend pick a reasonable value for them. */
3169 elf_link_hash_traverse (elf_hash_table (info
),
3170 elf_adjust_dynamic_symbol
,
3175 /* Add some entries to the .dynamic section. We fill in some of the
3176 values later, in elf_bfd_final_link, but we must add the entries
3177 now so that we know the final size of the .dynamic section. */
3179 /* If there are initialization and/or finalization functions to
3180 call then add the corresponding DT_INIT/DT_FINI entries. */
3181 h
= (info
->init_function
3182 ? elf_link_hash_lookup (elf_hash_table (info
),
3183 info
->init_function
, FALSE
,
3187 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
3188 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
3190 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_INIT
, (bfd_vma
) 0))
3193 h
= (info
->fini_function
3194 ? elf_link_hash_lookup (elf_hash_table (info
),
3195 info
->fini_function
, FALSE
,
3199 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
3200 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
3202 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FINI
, (bfd_vma
) 0))
3206 if (bfd_get_section_by_name (output_bfd
, ".preinit_array") != NULL
)
3208 /* DT_PREINIT_ARRAY is not allowed in shared library. */
3214 for (sub
= info
->input_bfds
; sub
!= NULL
;
3215 sub
= sub
->link_next
)
3216 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3217 if (elf_section_data (o
)->this_hdr
.sh_type
3218 == SHT_PREINIT_ARRAY
)
3220 (*_bfd_error_handler
)
3221 (_("%s: .preinit_array section is not allowed in DSO"),
3222 bfd_archive_filename (sub
));
3226 bfd_set_error (bfd_error_nonrepresentable_section
);
3230 if (!elf_add_dynamic_entry (info
, (bfd_vma
) DT_PREINIT_ARRAY
,
3232 || !elf_add_dynamic_entry (info
, (bfd_vma
) DT_PREINIT_ARRAYSZ
,
3236 if (bfd_get_section_by_name (output_bfd
, ".init_array") != NULL
)
3238 if (!elf_add_dynamic_entry (info
, (bfd_vma
) DT_INIT_ARRAY
,
3240 || !elf_add_dynamic_entry (info
, (bfd_vma
) DT_INIT_ARRAYSZ
,
3244 if (bfd_get_section_by_name (output_bfd
, ".fini_array") != NULL
)
3246 if (!elf_add_dynamic_entry (info
, (bfd_vma
) DT_FINI_ARRAY
,
3248 || !elf_add_dynamic_entry (info
, (bfd_vma
) DT_FINI_ARRAYSZ
,
3253 dynstr
= bfd_get_section_by_name (dynobj
, ".dynstr");
3254 /* If .dynstr is excluded from the link, we don't want any of
3255 these tags. Strictly, we should be checking each section
3256 individually; This quick check covers for the case where
3257 someone does a /DISCARD/ : { *(*) }. */
3258 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
3260 bfd_size_type strsize
;
3262 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
3263 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_HASH
, (bfd_vma
) 0)
3264 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_STRTAB
, (bfd_vma
) 0)
3265 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SYMTAB
, (bfd_vma
) 0)
3266 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_STRSZ
, strsize
)
3267 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SYMENT
,
3268 (bfd_vma
) sizeof (Elf_External_Sym
)))
3273 /* The backend must work out the sizes of all the other dynamic
3275 if (bed
->elf_backend_size_dynamic_sections
3276 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
3279 if (elf_hash_table (info
)->dynamic_sections_created
)
3281 bfd_size_type dynsymcount
;
3283 size_t bucketcount
= 0;
3284 size_t hash_entry_size
;
3285 unsigned int dtagcount
;
3287 /* Set up the version definition section. */
3288 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
3289 BFD_ASSERT (s
!= NULL
);
3291 /* We may have created additional version definitions if we are
3292 just linking a regular application. */
3293 verdefs
= asvinfo
.verdefs
;
3295 /* Skip anonymous version tag. */
3296 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
3297 verdefs
= verdefs
->next
;
3299 if (verdefs
== NULL
)
3300 _bfd_strip_section_from_output (info
, s
);
3305 struct bfd_elf_version_tree
*t
;
3307 Elf_Internal_Verdef def
;
3308 Elf_Internal_Verdaux defaux
;
3313 /* Make space for the base version. */
3314 size
+= sizeof (Elf_External_Verdef
);
3315 size
+= sizeof (Elf_External_Verdaux
);
3318 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3320 struct bfd_elf_version_deps
*n
;
3322 size
+= sizeof (Elf_External_Verdef
);
3323 size
+= sizeof (Elf_External_Verdaux
);
3326 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3327 size
+= sizeof (Elf_External_Verdaux
);
3330 s
->_raw_size
= size
;
3331 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3332 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
3335 /* Fill in the version definition section. */
3339 def
.vd_version
= VER_DEF_CURRENT
;
3340 def
.vd_flags
= VER_FLG_BASE
;
3343 def
.vd_aux
= sizeof (Elf_External_Verdef
);
3344 def
.vd_next
= (sizeof (Elf_External_Verdef
)
3345 + sizeof (Elf_External_Verdaux
));
3347 if (soname_indx
!= (bfd_size_type
) -1)
3349 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
3351 def
.vd_hash
= bfd_elf_hash (soname
);
3352 defaux
.vda_name
= soname_indx
;
3359 name
= basename (output_bfd
->filename
);
3360 def
.vd_hash
= bfd_elf_hash (name
);
3361 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3363 if (indx
== (bfd_size_type
) -1)
3365 defaux
.vda_name
= indx
;
3367 defaux
.vda_next
= 0;
3369 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
3370 (Elf_External_Verdef
*) p
);
3371 p
+= sizeof (Elf_External_Verdef
);
3372 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3373 (Elf_External_Verdaux
*) p
);
3374 p
+= sizeof (Elf_External_Verdaux
);
3376 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3379 struct bfd_elf_version_deps
*n
;
3380 struct elf_link_hash_entry
*h
;
3381 struct bfd_link_hash_entry
*bh
;
3384 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3387 /* Add a symbol representing this version. */
3389 if (! (_bfd_generic_link_add_one_symbol
3390 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
3391 (bfd_vma
) 0, (const char *) NULL
, FALSE
,
3392 get_elf_backend_data (dynobj
)->collect
, &bh
)))
3394 h
= (struct elf_link_hash_entry
*) bh
;
3395 h
->elf_link_hash_flags
&= ~ ELF_LINK_NON_ELF
;
3396 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3397 h
->type
= STT_OBJECT
;
3398 h
->verinfo
.vertree
= t
;
3400 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
3403 def
.vd_version
= VER_DEF_CURRENT
;
3405 if (t
->globals
== NULL
&& t
->locals
== NULL
&& ! t
->used
)
3406 def
.vd_flags
|= VER_FLG_WEAK
;
3407 def
.vd_ndx
= t
->vernum
+ 1;
3408 def
.vd_cnt
= cdeps
+ 1;
3409 def
.vd_hash
= bfd_elf_hash (t
->name
);
3410 def
.vd_aux
= sizeof (Elf_External_Verdef
);
3411 if (t
->next
!= NULL
)
3412 def
.vd_next
= (sizeof (Elf_External_Verdef
)
3413 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
3417 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
3418 (Elf_External_Verdef
*) p
);
3419 p
+= sizeof (Elf_External_Verdef
);
3421 defaux
.vda_name
= h
->dynstr_index
;
3422 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
3424 if (t
->deps
== NULL
)
3425 defaux
.vda_next
= 0;
3427 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
3428 t
->name_indx
= defaux
.vda_name
;
3430 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3431 (Elf_External_Verdaux
*) p
);
3432 p
+= sizeof (Elf_External_Verdaux
);
3434 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3436 if (n
->version_needed
== NULL
)
3438 /* This can happen if there was an error in the
3440 defaux
.vda_name
= 0;
3444 defaux
.vda_name
= n
->version_needed
->name_indx
;
3445 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
3448 if (n
->next
== NULL
)
3449 defaux
.vda_next
= 0;
3451 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
3453 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3454 (Elf_External_Verdaux
*) p
);
3455 p
+= sizeof (Elf_External_Verdaux
);
3459 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERDEF
, (bfd_vma
) 0)
3460 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERDEFNUM
,
3464 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
3467 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
3469 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FLAGS
, info
->flags
))
3476 info
->flags_1
&= ~ (DF_1_INITFIRST
3479 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FLAGS_1
,
3484 /* Work out the size of the version reference section. */
3486 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
3487 BFD_ASSERT (s
!= NULL
);
3489 struct elf_find_verdep_info sinfo
;
3491 sinfo
.output_bfd
= output_bfd
;
3493 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
3494 if (sinfo
.vers
== 0)
3496 sinfo
.failed
= FALSE
;
3498 elf_link_hash_traverse (elf_hash_table (info
),
3499 elf_link_find_version_dependencies
,
3502 if (elf_tdata (output_bfd
)->verref
== NULL
)
3503 _bfd_strip_section_from_output (info
, s
);
3506 Elf_Internal_Verneed
*t
;
3511 /* Build the version definition section. */
3514 for (t
= elf_tdata (output_bfd
)->verref
;
3518 Elf_Internal_Vernaux
*a
;
3520 size
+= sizeof (Elf_External_Verneed
);
3522 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3523 size
+= sizeof (Elf_External_Vernaux
);
3526 s
->_raw_size
= size
;
3527 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3528 if (s
->contents
== NULL
)
3532 for (t
= elf_tdata (output_bfd
)->verref
;
3537 Elf_Internal_Vernaux
*a
;
3541 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3544 t
->vn_version
= VER_NEED_CURRENT
;
3546 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3547 elf_dt_name (t
->vn_bfd
) != NULL
3548 ? elf_dt_name (t
->vn_bfd
)
3549 : basename (t
->vn_bfd
->filename
),
3551 if (indx
== (bfd_size_type
) -1)
3554 t
->vn_aux
= sizeof (Elf_External_Verneed
);
3555 if (t
->vn_nextref
== NULL
)
3558 t
->vn_next
= (sizeof (Elf_External_Verneed
)
3559 + caux
* sizeof (Elf_External_Vernaux
));
3561 _bfd_elf_swap_verneed_out (output_bfd
, t
,
3562 (Elf_External_Verneed
*) p
);
3563 p
+= sizeof (Elf_External_Verneed
);
3565 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3567 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
3568 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3569 a
->vna_nodename
, FALSE
);
3570 if (indx
== (bfd_size_type
) -1)
3573 if (a
->vna_nextptr
== NULL
)
3576 a
->vna_next
= sizeof (Elf_External_Vernaux
);
3578 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
3579 (Elf_External_Vernaux
*) p
);
3580 p
+= sizeof (Elf_External_Vernaux
);
3584 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERNEED
,
3586 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERNEEDNUM
,
3590 elf_tdata (output_bfd
)->cverrefs
= crefs
;
3594 /* Assign dynsym indicies. In a shared library we generate a
3595 section symbol for each output section, which come first.
3596 Next come all of the back-end allocated local dynamic syms,
3597 followed by the rest of the global symbols. */
3599 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
3601 /* Work out the size of the symbol version section. */
3602 s
= bfd_get_section_by_name (dynobj
, ".gnu.version");
3603 BFD_ASSERT (s
!= NULL
);
3604 if (dynsymcount
== 0
3605 || (verdefs
== NULL
&& elf_tdata (output_bfd
)->verref
== NULL
))
3607 _bfd_strip_section_from_output (info
, s
);
3608 /* The DYNSYMCOUNT might have changed if we were going to
3609 output a dynamic symbol table entry for S. */
3610 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
3614 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Versym
);
3615 s
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, s
->_raw_size
);
3616 if (s
->contents
== NULL
)
3619 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERSYM
, (bfd_vma
) 0))
3623 /* Set the size of the .dynsym and .hash sections. We counted
3624 the number of dynamic symbols in elf_link_add_object_symbols.
3625 We will build the contents of .dynsym and .hash when we build
3626 the final symbol table, because until then we do not know the
3627 correct value to give the symbols. We built the .dynstr
3628 section as we went along in elf_link_add_object_symbols. */
3629 s
= bfd_get_section_by_name (dynobj
, ".dynsym");
3630 BFD_ASSERT (s
!= NULL
);
3631 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Sym
);
3632 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3633 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
3636 if (dynsymcount
!= 0)
3638 Elf_Internal_Sym isym
;
3640 /* The first entry in .dynsym is a dummy symbol. */
3647 elf_swap_symbol_out (output_bfd
, &isym
, (PTR
) s
->contents
, (PTR
) 0);
3650 /* Compute the size of the hashing table. As a side effect this
3651 computes the hash values for all the names we export. */
3652 bucketcount
= compute_bucket_count (info
);
3654 s
= bfd_get_section_by_name (dynobj
, ".hash");
3655 BFD_ASSERT (s
!= NULL
);
3656 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
3657 s
->_raw_size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
3658 s
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, s
->_raw_size
);
3659 if (s
->contents
== NULL
)
3662 bfd_put (8 * hash_entry_size
, output_bfd
, (bfd_vma
) bucketcount
,
3664 bfd_put (8 * hash_entry_size
, output_bfd
, (bfd_vma
) dynsymcount
,
3665 s
->contents
+ hash_entry_size
);
3667 elf_hash_table (info
)->bucketcount
= bucketcount
;
3669 s
= bfd_get_section_by_name (dynobj
, ".dynstr");
3670 BFD_ASSERT (s
!= NULL
);
3672 elf_finalize_dynstr (output_bfd
, info
);
3674 s
->_raw_size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
3676 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
3677 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_NULL
, (bfd_vma
) 0))
3684 /* This function is used to adjust offsets into .dynstr for
3685 dynamic symbols. This is called via elf_link_hash_traverse. */
3687 static bfd_boolean elf_adjust_dynstr_offsets
3688 PARAMS ((struct elf_link_hash_entry
*, PTR
));
3691 elf_adjust_dynstr_offsets (h
, data
)
3692 struct elf_link_hash_entry
*h
;
3695 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3697 if (h
->root
.type
== bfd_link_hash_warning
)
3698 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3700 if (h
->dynindx
!= -1)
3701 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3705 /* Assign string offsets in .dynstr, update all structures referencing
3709 elf_finalize_dynstr (output_bfd
, info
)
3711 struct bfd_link_info
*info
;
3713 struct elf_link_local_dynamic_entry
*entry
;
3714 struct elf_strtab_hash
*dynstr
= elf_hash_table (info
)->dynstr
;
3715 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3718 Elf_External_Dyn
*dyncon
, *dynconend
;
3720 _bfd_elf_strtab_finalize (dynstr
);
3721 size
= _bfd_elf_strtab_size (dynstr
);
3723 /* Update all .dynamic entries referencing .dynstr strings. */
3724 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3725 BFD_ASSERT (sdyn
!= NULL
);
3727 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
3728 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
3730 for (; dyncon
< dynconend
; dyncon
++)
3732 Elf_Internal_Dyn dyn
;
3734 elf_swap_dyn_in (dynobj
, dyncon
, & dyn
);
3738 dyn
.d_un
.d_val
= size
;
3739 elf_swap_dyn_out (dynobj
, & dyn
, dyncon
);
3747 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3748 elf_swap_dyn_out (dynobj
, & dyn
, dyncon
);
3755 /* Now update local dynamic symbols. */
3756 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
3757 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3758 entry
->isym
.st_name
);
3760 /* And the rest of dynamic symbols. */
3761 elf_link_hash_traverse (elf_hash_table (info
),
3762 elf_adjust_dynstr_offsets
, dynstr
);
3764 /* Adjust version definitions. */
3765 if (elf_tdata (output_bfd
)->cverdefs
)
3770 Elf_Internal_Verdef def
;
3771 Elf_Internal_Verdaux defaux
;
3773 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
3774 p
= (bfd_byte
*) s
->contents
;
3777 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3779 p
+= sizeof (Elf_External_Verdef
);
3780 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3782 _bfd_elf_swap_verdaux_in (output_bfd
,
3783 (Elf_External_Verdaux
*) p
, &defaux
);
3784 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3786 _bfd_elf_swap_verdaux_out (output_bfd
,
3787 &defaux
, (Elf_External_Verdaux
*) p
);
3788 p
+= sizeof (Elf_External_Verdaux
);
3791 while (def
.vd_next
);
3794 /* Adjust version references. */
3795 if (elf_tdata (output_bfd
)->verref
)
3800 Elf_Internal_Verneed need
;
3801 Elf_Internal_Vernaux needaux
;
3803 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
3804 p
= (bfd_byte
*) s
->contents
;
3807 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3809 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3810 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3811 (Elf_External_Verneed
*) p
);
3812 p
+= sizeof (Elf_External_Verneed
);
3813 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3815 _bfd_elf_swap_vernaux_in (output_bfd
,
3816 (Elf_External_Vernaux
*) p
, &needaux
);
3817 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3819 _bfd_elf_swap_vernaux_out (output_bfd
,
3821 (Elf_External_Vernaux
*) p
);
3822 p
+= sizeof (Elf_External_Vernaux
);
3825 while (need
.vn_next
);
3831 /* Fix up the flags for a symbol. This handles various cases which
3832 can only be fixed after all the input files are seen. This is
3833 currently called by both adjust_dynamic_symbol and
3834 assign_sym_version, which is unnecessary but perhaps more robust in
3835 the face of future changes. */
3838 elf_fix_symbol_flags (h
, eif
)
3839 struct elf_link_hash_entry
*h
;
3840 struct elf_info_failed
*eif
;
3842 /* If this symbol was mentioned in a non-ELF file, try to set
3843 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
3844 permit a non-ELF file to correctly refer to a symbol defined in
3845 an ELF dynamic object. */
3846 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_ELF
) != 0)
3848 while (h
->root
.type
== bfd_link_hash_indirect
)
3849 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3851 if (h
->root
.type
!= bfd_link_hash_defined
3852 && h
->root
.type
!= bfd_link_hash_defweak
)
3853 h
->elf_link_hash_flags
|= (ELF_LINK_HASH_REF_REGULAR
3854 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
);
3857 if (h
->root
.u
.def
.section
->owner
!= NULL
3858 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
3859 == bfd_target_elf_flavour
))
3860 h
->elf_link_hash_flags
|= (ELF_LINK_HASH_REF_REGULAR
3861 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
);
3863 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3866 if (h
->dynindx
== -1
3867 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
3868 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0))
3870 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
3879 /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol
3880 was first seen in a non-ELF file. Fortunately, if the symbol
3881 was first seen in an ELF file, we're probably OK unless the
3882 symbol was defined in a non-ELF file. Catch that case here.
3883 FIXME: We're still in trouble if the symbol was first seen in
3884 a dynamic object, and then later in a non-ELF regular object. */
3885 if ((h
->root
.type
== bfd_link_hash_defined
3886 || h
->root
.type
== bfd_link_hash_defweak
)
3887 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
3888 && (h
->root
.u
.def
.section
->owner
!= NULL
3889 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
3890 != bfd_target_elf_flavour
)
3891 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
3892 && (h
->elf_link_hash_flags
3893 & ELF_LINK_HASH_DEF_DYNAMIC
) == 0)))
3894 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3897 /* If this is a final link, and the symbol was defined as a common
3898 symbol in a regular object file, and there was no definition in
3899 any dynamic object, then the linker will have allocated space for
3900 the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR
3901 flag will not have been set. */
3902 if (h
->root
.type
== bfd_link_hash_defined
3903 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
3904 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
3905 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3906 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
3907 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3909 /* If -Bsymbolic was used (which means to bind references to global
3910 symbols to the definition within the shared object), and this
3911 symbol was defined in a regular object, then it actually doesn't
3912 need a PLT entry, and we can accomplish that by forcing it local.
3913 Likewise, if the symbol has hidden or internal visibility.
3914 FIXME: It might be that we also do not need a PLT for other
3915 non-hidden visibilities, but we would have to tell that to the
3916 backend specifically; we can't just clear PLT-related data here. */
3917 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0
3918 && eif
->info
->shared
3919 && is_elf_hash_table (eif
->info
)
3920 && (eif
->info
->symbolic
3921 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
3922 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
3923 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3925 struct elf_backend_data
*bed
;
3926 bfd_boolean force_local
;
3928 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
3930 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
3931 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
3932 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
3935 /* If this is a weak defined symbol in a dynamic object, and we know
3936 the real definition in the dynamic object, copy interesting flags
3937 over to the real definition. */
3938 if (h
->weakdef
!= NULL
)
3940 struct elf_link_hash_entry
*weakdef
;
3942 weakdef
= h
->weakdef
;
3943 if (h
->root
.type
== bfd_link_hash_indirect
)
3944 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3946 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3947 || h
->root
.type
== bfd_link_hash_defweak
);
3948 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
3949 || weakdef
->root
.type
== bfd_link_hash_defweak
);
3950 BFD_ASSERT (weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
);
3952 /* If the real definition is defined by a regular object file,
3953 don't do anything special. See the longer description in
3954 elf_adjust_dynamic_symbol, below. */
3955 if ((weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3959 struct elf_backend_data
*bed
;
3961 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
3962 (*bed
->elf_backend_copy_indirect_symbol
) (bed
, weakdef
, h
);
3969 /* Make the backend pick a good value for a dynamic symbol. This is
3970 called via elf_link_hash_traverse, and also calls itself
3974 elf_adjust_dynamic_symbol (h
, data
)
3975 struct elf_link_hash_entry
*h
;
3978 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
3980 struct elf_backend_data
*bed
;
3982 if (! is_elf_hash_table (eif
->info
))
3985 if (h
->root
.type
== bfd_link_hash_warning
)
3987 h
->plt
= elf_hash_table (eif
->info
)->init_offset
;
3988 h
->got
= elf_hash_table (eif
->info
)->init_offset
;
3990 /* When warning symbols are created, they **replace** the "real"
3991 entry in the hash table, thus we never get to see the real
3992 symbol in a hash traversal. So look at it now. */
3993 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3996 /* Ignore indirect symbols. These are added by the versioning code. */
3997 if (h
->root
.type
== bfd_link_hash_indirect
)
4000 /* Fix the symbol flags. */
4001 if (! elf_fix_symbol_flags (h
, eif
))
4004 /* If this symbol does not require a PLT entry, and it is not
4005 defined by a dynamic object, or is not referenced by a regular
4006 object, ignore it. We do have to handle a weak defined symbol,
4007 even if no regular object refers to it, if we decided to add it
4008 to the dynamic symbol table. FIXME: Do we normally need to worry
4009 about symbols which are defined by one dynamic object and
4010 referenced by another one? */
4011 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) == 0
4012 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
4013 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
4014 || ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0
4015 && (h
->weakdef
== NULL
|| h
->weakdef
->dynindx
== -1))))
4017 h
->plt
= elf_hash_table (eif
->info
)->init_offset
;
4021 /* If we've already adjusted this symbol, don't do it again. This
4022 can happen via a recursive call. */
4023 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DYNAMIC_ADJUSTED
) != 0)
4026 /* Don't look at this symbol again. Note that we must set this
4027 after checking the above conditions, because we may look at a
4028 symbol once, decide not to do anything, and then get called
4029 recursively later after REF_REGULAR is set below. */
4030 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DYNAMIC_ADJUSTED
;
4032 /* If this is a weak definition, and we know a real definition, and
4033 the real symbol is not itself defined by a regular object file,
4034 then get a good value for the real definition. We handle the
4035 real symbol first, for the convenience of the backend routine.
4037 Note that there is a confusing case here. If the real definition
4038 is defined by a regular object file, we don't get the real symbol
4039 from the dynamic object, but we do get the weak symbol. If the
4040 processor backend uses a COPY reloc, then if some routine in the
4041 dynamic object changes the real symbol, we will not see that
4042 change in the corresponding weak symbol. This is the way other
4043 ELF linkers work as well, and seems to be a result of the shared
4046 I will clarify this issue. Most SVR4 shared libraries define the
4047 variable _timezone and define timezone as a weak synonym. The
4048 tzset call changes _timezone. If you write
4049 extern int timezone;
4051 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
4052 you might expect that, since timezone is a synonym for _timezone,
4053 the same number will print both times. However, if the processor
4054 backend uses a COPY reloc, then actually timezone will be copied
4055 into your process image, and, since you define _timezone
4056 yourself, _timezone will not. Thus timezone and _timezone will
4057 wind up at different memory locations. The tzset call will set
4058 _timezone, leaving timezone unchanged. */
4060 if (h
->weakdef
!= NULL
)
4062 /* If we get to this point, we know there is an implicit
4063 reference by a regular object file via the weak symbol H.
4064 FIXME: Is this really true? What if the traversal finds
4065 H->WEAKDEF before it finds H? */
4066 h
->weakdef
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
4068 if (! elf_adjust_dynamic_symbol (h
->weakdef
, (PTR
) eif
))
4072 /* If a symbol has no type and no size and does not require a PLT
4073 entry, then we are probably about to do the wrong thing here: we
4074 are probably going to create a COPY reloc for an empty object.
4075 This case can arise when a shared object is built with assembly
4076 code, and the assembly code fails to set the symbol type. */
4078 && h
->type
== STT_NOTYPE
4079 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) == 0)
4080 (*_bfd_error_handler
)
4081 (_("warning: type and size of dynamic symbol `%s' are not defined"),
4082 h
->root
.root
.string
);
4084 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
4085 bed
= get_elf_backend_data (dynobj
);
4086 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
4095 /* This routine is used to export all defined symbols into the dynamic
4096 symbol table. It is called via elf_link_hash_traverse. */
4099 elf_export_symbol (h
, data
)
4100 struct elf_link_hash_entry
*h
;
4103 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
4105 /* Ignore indirect symbols. These are added by the versioning code. */
4106 if (h
->root
.type
== bfd_link_hash_indirect
)
4109 if (h
->root
.type
== bfd_link_hash_warning
)
4110 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4112 if (h
->dynindx
== -1
4113 && (h
->elf_link_hash_flags
4114 & (ELF_LINK_HASH_DEF_REGULAR
| ELF_LINK_HASH_REF_REGULAR
)) != 0)
4116 struct bfd_elf_version_tree
*t
;
4117 struct bfd_elf_version_expr
*d
;
4119 for (t
= eif
->verdefs
; t
!= NULL
; t
= t
->next
)
4121 if (t
->globals
!= NULL
)
4123 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
4125 if ((*d
->match
) (d
, h
->root
.root
.string
))
4130 if (t
->locals
!= NULL
)
4132 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
4134 if ((*d
->match
) (d
, h
->root
.root
.string
))
4143 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
4154 /* Look through the symbols which are defined in other shared
4155 libraries and referenced here. Update the list of version
4156 dependencies. This will be put into the .gnu.version_r section.
4157 This function is called via elf_link_hash_traverse. */
4160 elf_link_find_version_dependencies (h
, data
)
4161 struct elf_link_hash_entry
*h
;
4164 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
4165 Elf_Internal_Verneed
*t
;
4166 Elf_Internal_Vernaux
*a
;
4169 if (h
->root
.type
== bfd_link_hash_warning
)
4170 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4172 /* We only care about symbols defined in shared objects with version
4174 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
4175 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
4177 || h
->verinfo
.verdef
== NULL
)
4180 /* See if we already know about this version. */
4181 for (t
= elf_tdata (rinfo
->output_bfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
4183 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
4186 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4187 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
4193 /* This is a new version. Add it to tree we are building. */
4198 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->output_bfd
, amt
);
4201 rinfo
->failed
= TRUE
;
4205 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
4206 t
->vn_nextref
= elf_tdata (rinfo
->output_bfd
)->verref
;
4207 elf_tdata (rinfo
->output_bfd
)->verref
= t
;
4211 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->output_bfd
, amt
);
4213 /* Note that we are copying a string pointer here, and testing it
4214 above. If bfd_elf_string_from_elf_section is ever changed to
4215 discard the string data when low in memory, this will have to be
4217 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
4219 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
4220 a
->vna_nextptr
= t
->vn_auxptr
;
4222 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
4225 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
4232 /* Figure out appropriate versions for all the symbols. We may not
4233 have the version number script until we have read all of the input
4234 files, so until that point we don't know which symbols should be
4235 local. This function is called via elf_link_hash_traverse. */
4238 elf_link_assign_sym_version (h
, data
)
4239 struct elf_link_hash_entry
*h
;
4242 struct elf_assign_sym_version_info
*sinfo
;
4243 struct bfd_link_info
*info
;
4244 struct elf_backend_data
*bed
;
4245 struct elf_info_failed eif
;
4249 sinfo
= (struct elf_assign_sym_version_info
*) data
;
4252 if (h
->root
.type
== bfd_link_hash_warning
)
4253 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4255 /* Fix the symbol flags. */
4258 if (! elf_fix_symbol_flags (h
, &eif
))
4261 sinfo
->failed
= TRUE
;
4265 /* We only need version numbers for symbols defined in regular
4267 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
4270 bed
= get_elf_backend_data (sinfo
->output_bfd
);
4271 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
4272 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
4274 struct bfd_elf_version_tree
*t
;
4279 /* There are two consecutive ELF_VER_CHR characters if this is
4280 not a hidden symbol. */
4282 if (*p
== ELF_VER_CHR
)
4288 /* If there is no version string, we can just return out. */
4292 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
4296 /* Look for the version. If we find it, it is no longer weak. */
4297 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
4299 if (strcmp (t
->name
, p
) == 0)
4303 struct bfd_elf_version_expr
*d
;
4305 len
= p
- h
->root
.root
.string
;
4306 alc
= bfd_malloc ((bfd_size_type
) len
);
4309 memcpy (alc
, h
->root
.root
.string
, len
- 1);
4310 alc
[len
- 1] = '\0';
4311 if (alc
[len
- 2] == ELF_VER_CHR
)
4312 alc
[len
- 2] = '\0';
4314 h
->verinfo
.vertree
= t
;
4318 if (t
->globals
!= NULL
)
4320 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
4321 if ((*d
->match
) (d
, alc
))
4325 /* See if there is anything to force this symbol to
4327 if (d
== NULL
&& t
->locals
!= NULL
)
4329 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
4331 if ((*d
->match
) (d
, alc
))
4333 if (h
->dynindx
!= -1
4335 && ! info
->export_dynamic
)
4337 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4350 /* If we are building an application, we need to create a
4351 version node for this version. */
4352 if (t
== NULL
&& ! info
->shared
)
4354 struct bfd_elf_version_tree
**pp
;
4357 /* If we aren't going to export this symbol, we don't need
4358 to worry about it. */
4359 if (h
->dynindx
== -1)
4363 t
= ((struct bfd_elf_version_tree
*)
4364 bfd_alloc (sinfo
->output_bfd
, amt
));
4367 sinfo
->failed
= TRUE
;
4376 t
->name_indx
= (unsigned int) -1;
4380 /* Don't count anonymous version tag. */
4381 if (sinfo
->verdefs
!= NULL
&& sinfo
->verdefs
->vernum
== 0)
4383 for (pp
= &sinfo
->verdefs
; *pp
!= NULL
; pp
= &(*pp
)->next
)
4385 t
->vernum
= version_index
;
4389 h
->verinfo
.vertree
= t
;
4393 /* We could not find the version for a symbol when
4394 generating a shared archive. Return an error. */
4395 (*_bfd_error_handler
)
4396 (_("%s: undefined versioned symbol name %s"),
4397 bfd_get_filename (sinfo
->output_bfd
), h
->root
.root
.string
);
4398 bfd_set_error (bfd_error_bad_value
);
4399 sinfo
->failed
= TRUE
;
4404 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
4407 /* If we don't have a version for this symbol, see if we can find
4409 if (h
->verinfo
.vertree
== NULL
&& sinfo
->verdefs
!= NULL
)
4411 struct bfd_elf_version_tree
*t
;
4412 struct bfd_elf_version_tree
*local_ver
;
4413 struct bfd_elf_version_expr
*d
;
4415 /* See if can find what version this symbol is in. If the
4416 symbol is supposed to be local, then don't actually register
4419 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
4421 if (t
->globals
!= NULL
)
4423 bfd_boolean matched
;
4426 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
4428 if ((*d
->match
) (d
, h
->root
.root
.string
))
4434 /* There is a version without definition. Make
4435 the symbol the default definition for this
4437 h
->verinfo
.vertree
= t
;
4448 /* There is no undefined version for this symbol. Hide the
4450 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4453 if (t
->locals
!= NULL
)
4455 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
4457 /* If the match is "*", keep looking for a more
4458 explicit, perhaps even global, match. */
4459 if (d
->pattern
[0] == '*' && d
->pattern
[1] == '\0')
4461 else if ((*d
->match
) (d
, h
->root
.root
.string
))
4473 if (local_ver
!= NULL
)
4475 h
->verinfo
.vertree
= local_ver
;
4476 if (h
->dynindx
!= -1
4478 && ! info
->export_dynamic
)
4480 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
4488 /* Final phase of ELF linker. */
4490 /* A structure we use to avoid passing large numbers of arguments. */
4492 struct elf_final_link_info
4494 /* General link information. */
4495 struct bfd_link_info
*info
;
4498 /* Symbol string table. */
4499 struct bfd_strtab_hash
*symstrtab
;
4500 /* .dynsym section. */
4501 asection
*dynsym_sec
;
4502 /* .hash section. */
4504 /* symbol version section (.gnu.version). */
4505 asection
*symver_sec
;
4506 /* first SHF_TLS section (if any). */
4507 asection
*first_tls_sec
;
4508 /* Buffer large enough to hold contents of any section. */
4510 /* Buffer large enough to hold external relocs of any section. */
4511 PTR external_relocs
;
4512 /* Buffer large enough to hold internal relocs of any section. */
4513 Elf_Internal_Rela
*internal_relocs
;
4514 /* Buffer large enough to hold external local symbols of any input
4516 Elf_External_Sym
*external_syms
;
4517 /* And a buffer for symbol section indices. */
4518 Elf_External_Sym_Shndx
*locsym_shndx
;
4519 /* Buffer large enough to hold internal local symbols of any input
4521 Elf_Internal_Sym
*internal_syms
;
4522 /* Array large enough to hold a symbol index for each local symbol
4523 of any input BFD. */
4525 /* Array large enough to hold a section pointer for each local
4526 symbol of any input BFD. */
4527 asection
**sections
;
4528 /* Buffer to hold swapped out symbols. */
4529 Elf_External_Sym
*symbuf
;
4530 /* And one for symbol section indices. */
4531 Elf_External_Sym_Shndx
*symshndxbuf
;
4532 /* Number of swapped out symbols in buffer. */
4533 size_t symbuf_count
;
4534 /* Number of symbols which fit in symbuf. */
4536 /* And same for symshndxbuf. */
4537 size_t shndxbuf_size
;
4540 static bfd_boolean elf_link_output_sym
4541 PARAMS ((struct elf_final_link_info
*, const char *,
4542 Elf_Internal_Sym
*, asection
*));
4543 static bfd_boolean elf_link_flush_output_syms
4544 PARAMS ((struct elf_final_link_info
*));
4545 static bfd_boolean elf_link_output_extsym
4546 PARAMS ((struct elf_link_hash_entry
*, PTR
));
4547 static bfd_boolean elf_link_sec_merge_syms
4548 PARAMS ((struct elf_link_hash_entry
*, PTR
));
4549 static bfd_boolean elf_link_check_versioned_symbol
4550 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
4551 static bfd_boolean elf_link_input_bfd
4552 PARAMS ((struct elf_final_link_info
*, bfd
*));
4553 static bfd_boolean elf_reloc_link_order
4554 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
4555 struct bfd_link_order
*));
4557 /* This struct is used to pass information to elf_link_output_extsym. */
4559 struct elf_outext_info
4562 bfd_boolean localsyms
;
4563 struct elf_final_link_info
*finfo
;
4566 /* Compute the size of, and allocate space for, REL_HDR which is the
4567 section header for a section containing relocations for O. */
4570 elf_link_size_reloc_section (abfd
, rel_hdr
, o
)
4572 Elf_Internal_Shdr
*rel_hdr
;
4575 bfd_size_type reloc_count
;
4576 bfd_size_type num_rel_hashes
;
4578 /* Figure out how many relocations there will be. */
4579 if (rel_hdr
== &elf_section_data (o
)->rel_hdr
)
4580 reloc_count
= elf_section_data (o
)->rel_count
;
4582 reloc_count
= elf_section_data (o
)->rel_count2
;
4584 num_rel_hashes
= o
->reloc_count
;
4585 if (num_rel_hashes
< reloc_count
)
4586 num_rel_hashes
= reloc_count
;
4588 /* That allows us to calculate the size of the section. */
4589 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reloc_count
;
4591 /* The contents field must last into write_object_contents, so we
4592 allocate it with bfd_alloc rather than malloc. Also since we
4593 cannot be sure that the contents will actually be filled in,
4594 we zero the allocated space. */
4595 rel_hdr
->contents
= (PTR
) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
4596 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
4599 /* We only allocate one set of hash entries, so we only do it the
4600 first time we are called. */
4601 if (elf_section_data (o
)->rel_hashes
== NULL
4604 struct elf_link_hash_entry
**p
;
4606 p
= ((struct elf_link_hash_entry
**)
4607 bfd_zmalloc (num_rel_hashes
4608 * sizeof (struct elf_link_hash_entry
*)));
4612 elf_section_data (o
)->rel_hashes
= p
;
4618 /* When performing a relocateable link, the input relocations are
4619 preserved. But, if they reference global symbols, the indices
4620 referenced must be updated. Update all the relocations in
4621 REL_HDR (there are COUNT of them), using the data in REL_HASH. */
4624 elf_link_adjust_relocs (abfd
, rel_hdr
, count
, rel_hash
)
4626 Elf_Internal_Shdr
*rel_hdr
;
4628 struct elf_link_hash_entry
**rel_hash
;
4631 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4633 void (*swap_in
) PARAMS ((bfd
*, const bfd_byte
*, Elf_Internal_Rela
*));
4634 void (*swap_out
) PARAMS ((bfd
*, const Elf_Internal_Rela
*, bfd_byte
*));
4636 if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
4638 swap_in
= bed
->s
->swap_reloc_in
;
4639 swap_out
= bed
->s
->swap_reloc_out
;
4641 else if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rela
))
4643 swap_in
= bed
->s
->swap_reloca_in
;
4644 swap_out
= bed
->s
->swap_reloca_out
;
4649 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
4652 erela
= rel_hdr
->contents
;
4653 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= rel_hdr
->sh_entsize
)
4655 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
4658 if (*rel_hash
== NULL
)
4661 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
4663 (*swap_in
) (abfd
, erela
, irela
);
4664 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
4665 irela
[j
].r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
4666 ELF_R_TYPE (irela
[j
].r_info
));
4667 (*swap_out
) (abfd
, irela
, erela
);
4671 struct elf_link_sort_rela
4674 enum elf_reloc_type_class type
;
4675 /* We use this as an array of size int_rels_per_ext_rel. */
4676 Elf_Internal_Rela rela
[1];
4680 elf_link_sort_cmp1 (A
, B
)
4684 struct elf_link_sort_rela
*a
= (struct elf_link_sort_rela
*) A
;
4685 struct elf_link_sort_rela
*b
= (struct elf_link_sort_rela
*) B
;
4686 int relativea
, relativeb
;
4688 relativea
= a
->type
== reloc_class_relative
;
4689 relativeb
= b
->type
== reloc_class_relative
;
4691 if (relativea
< relativeb
)
4693 if (relativea
> relativeb
)
4695 if (ELF_R_SYM (a
->rela
->r_info
) < ELF_R_SYM (b
->rela
->r_info
))
4697 if (ELF_R_SYM (a
->rela
->r_info
) > ELF_R_SYM (b
->rela
->r_info
))
4699 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
4701 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
4707 elf_link_sort_cmp2 (A
, B
)
4711 struct elf_link_sort_rela
*a
= (struct elf_link_sort_rela
*) A
;
4712 struct elf_link_sort_rela
*b
= (struct elf_link_sort_rela
*) B
;
4715 if (a
->offset
< b
->offset
)
4717 if (a
->offset
> b
->offset
)
4719 copya
= (a
->type
== reloc_class_copy
) * 2 + (a
->type
== reloc_class_plt
);
4720 copyb
= (b
->type
== reloc_class_copy
) * 2 + (b
->type
== reloc_class_plt
);
4725 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
4727 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
4733 elf_link_sort_relocs (abfd
, info
, psec
)
4735 struct bfd_link_info
*info
;
4738 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
4739 asection
*reldyn
, *o
;
4740 bfd_size_type count
, size
;
4741 size_t i
, ret
, sort_elt
, ext_size
;
4742 bfd_byte
*sort
, *s_non_relative
, *p
;
4743 struct elf_link_sort_rela
*sq
;
4744 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4745 int i2e
= bed
->s
->int_rels_per_ext_rel
;
4746 void (*swap_in
) PARAMS ((bfd
*, const bfd_byte
*, Elf_Internal_Rela
*));
4747 void (*swap_out
) PARAMS ((bfd
*, const Elf_Internal_Rela
*, bfd_byte
*));
4749 reldyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
4750 if (reldyn
== NULL
|| reldyn
->_raw_size
== 0)
4752 reldyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
4753 if (reldyn
== NULL
|| reldyn
->_raw_size
== 0)
4755 ext_size
= sizeof (Elf_External_Rel
);
4756 swap_in
= bed
->s
->swap_reloc_in
;
4757 swap_out
= bed
->s
->swap_reloc_out
;
4761 ext_size
= sizeof (Elf_External_Rela
);
4762 swap_in
= bed
->s
->swap_reloca_in
;
4763 swap_out
= bed
->s
->swap_reloca_out
;
4765 count
= reldyn
->_raw_size
/ ext_size
;
4768 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4769 if ((o
->flags
& (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
))
4770 == (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
)
4771 && o
->output_section
== reldyn
)
4772 size
+= o
->_raw_size
;
4774 if (size
!= reldyn
->_raw_size
)
4777 sort_elt
= (sizeof (struct elf_link_sort_rela
)
4778 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
4779 sort
= bfd_zmalloc (sort_elt
* count
);
4782 (*info
->callbacks
->warning
)
4783 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0,
4788 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4789 if ((o
->flags
& (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
))
4790 == (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
)
4791 && o
->output_section
== reldyn
)
4793 bfd_byte
*erel
, *erelend
;
4796 erelend
= o
->contents
+ o
->_raw_size
;
4797 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
4798 while (erel
< erelend
)
4800 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
4801 (*swap_in
) (abfd
, erel
, s
->rela
);
4802 s
->type
= (*bed
->elf_backend_reloc_type_class
) (s
->rela
);
4808 qsort (sort
, (size_t) count
, sort_elt
, elf_link_sort_cmp1
);
4810 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
4812 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
4813 if (s
->type
!= reloc_class_relative
)
4819 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
4820 for (; i
< count
; i
++, p
+= sort_elt
)
4822 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
4823 if (ELF_R_SYM (sp
->rela
->r_info
) != ELF_R_SYM (sq
->rela
->r_info
))
4825 sp
->offset
= sq
->rela
->r_offset
;
4828 qsort (s_non_relative
, (size_t) count
- ret
, sort_elt
, elf_link_sort_cmp2
);
4830 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4831 if ((o
->flags
& (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
))
4832 == (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
)
4833 && o
->output_section
== reldyn
)
4835 bfd_byte
*erel
, *erelend
;
4838 erelend
= o
->contents
+ o
->_raw_size
;
4839 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
4840 while (erel
< erelend
)
4842 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
4843 (*swap_out
) (abfd
, s
->rela
, erel
);
4853 /* Do the final step of an ELF link. */
4856 elf_bfd_final_link (abfd
, info
)
4858 struct bfd_link_info
*info
;
4860 bfd_boolean dynamic
;
4861 bfd_boolean emit_relocs
;
4863 struct elf_final_link_info finfo
;
4864 register asection
*o
;
4865 register struct bfd_link_order
*p
;
4867 bfd_size_type max_contents_size
;
4868 bfd_size_type max_external_reloc_size
;
4869 bfd_size_type max_internal_reloc_count
;
4870 bfd_size_type max_sym_count
;
4871 bfd_size_type max_sym_shndx_count
;
4873 Elf_Internal_Sym elfsym
;
4875 Elf_Internal_Shdr
*symtab_hdr
;
4876 Elf_Internal_Shdr
*symtab_shndx_hdr
;
4877 Elf_Internal_Shdr
*symstrtab_hdr
;
4878 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4879 struct elf_outext_info eoinfo
;
4881 size_t relativecount
= 0;
4882 asection
*reldyn
= 0;
4885 if (! is_elf_hash_table (info
))
4889 abfd
->flags
|= DYNAMIC
;
4891 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
4892 dynobj
= elf_hash_table (info
)->dynobj
;
4894 emit_relocs
= (info
->relocateable
4895 || info
->emitrelocations
4896 || bed
->elf_backend_emit_relocs
);
4899 finfo
.output_bfd
= abfd
;
4900 finfo
.symstrtab
= elf_stringtab_init ();
4901 if (finfo
.symstrtab
== NULL
)
4906 finfo
.dynsym_sec
= NULL
;
4907 finfo
.hash_sec
= NULL
;
4908 finfo
.symver_sec
= NULL
;
4912 finfo
.dynsym_sec
= bfd_get_section_by_name (dynobj
, ".dynsym");
4913 finfo
.hash_sec
= bfd_get_section_by_name (dynobj
, ".hash");
4914 BFD_ASSERT (finfo
.dynsym_sec
!= NULL
&& finfo
.hash_sec
!= NULL
);
4915 finfo
.symver_sec
= bfd_get_section_by_name (dynobj
, ".gnu.version");
4916 /* Note that it is OK if symver_sec is NULL. */
4919 finfo
.contents
= NULL
;
4920 finfo
.external_relocs
= NULL
;
4921 finfo
.internal_relocs
= NULL
;
4922 finfo
.external_syms
= NULL
;
4923 finfo
.locsym_shndx
= NULL
;
4924 finfo
.internal_syms
= NULL
;
4925 finfo
.indices
= NULL
;
4926 finfo
.sections
= NULL
;
4927 finfo
.symbuf
= NULL
;
4928 finfo
.symshndxbuf
= NULL
;
4929 finfo
.symbuf_count
= 0;
4930 finfo
.shndxbuf_size
= 0;
4931 finfo
.first_tls_sec
= NULL
;
4932 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
4933 if ((o
->flags
& SEC_THREAD_LOCAL
) != 0
4934 && (o
->flags
& SEC_LOAD
) != 0)
4936 finfo
.first_tls_sec
= o
;
4940 /* Count up the number of relocations we will output for each output
4941 section, so that we know the sizes of the reloc sections. We
4942 also figure out some maximum sizes. */
4943 max_contents_size
= 0;
4944 max_external_reloc_size
= 0;
4945 max_internal_reloc_count
= 0;
4947 max_sym_shndx_count
= 0;
4949 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
4953 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
4955 if (p
->type
== bfd_section_reloc_link_order
4956 || p
->type
== bfd_symbol_reloc_link_order
)
4958 else if (p
->type
== bfd_indirect_link_order
)
4962 sec
= p
->u
.indirect
.section
;
4964 /* Mark all sections which are to be included in the
4965 link. This will normally be every section. We need
4966 to do this so that we can identify any sections which
4967 the linker has decided to not include. */
4968 sec
->linker_mark
= TRUE
;
4970 if (sec
->flags
& SEC_MERGE
)
4973 if (info
->relocateable
|| info
->emitrelocations
)
4974 o
->reloc_count
+= sec
->reloc_count
;
4975 else if (bed
->elf_backend_count_relocs
)
4977 Elf_Internal_Rela
* relocs
;
4979 relocs
= (NAME(_bfd_elf
,link_read_relocs
)
4980 (abfd
, sec
, (PTR
) NULL
,
4981 (Elf_Internal_Rela
*) NULL
, info
->keep_memory
));
4984 += (*bed
->elf_backend_count_relocs
) (sec
, relocs
);
4986 if (elf_section_data (o
)->relocs
!= relocs
)
4990 if (sec
->_raw_size
> max_contents_size
)
4991 max_contents_size
= sec
->_raw_size
;
4992 if (sec
->_cooked_size
> max_contents_size
)
4993 max_contents_size
= sec
->_cooked_size
;
4995 /* We are interested in just local symbols, not all
4997 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
4998 && (sec
->owner
->flags
& DYNAMIC
) == 0)
5002 if (elf_bad_symtab (sec
->owner
))
5003 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
5004 / sizeof (Elf_External_Sym
));
5006 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
5008 if (sym_count
> max_sym_count
)
5009 max_sym_count
= sym_count
;
5011 if (sym_count
> max_sym_shndx_count
5012 && elf_symtab_shndx (sec
->owner
) != 0)
5013 max_sym_shndx_count
= sym_count
;
5015 if ((sec
->flags
& SEC_RELOC
) != 0)
5019 ext_size
= elf_section_data (sec
)->rel_hdr
.sh_size
;
5020 if (ext_size
> max_external_reloc_size
)
5021 max_external_reloc_size
= ext_size
;
5022 if (sec
->reloc_count
> max_internal_reloc_count
)
5023 max_internal_reloc_count
= sec
->reloc_count
;
5029 if (o
->reloc_count
> 0)
5030 o
->flags
|= SEC_RELOC
;
5033 /* Explicitly clear the SEC_RELOC flag. The linker tends to
5034 set it (this is probably a bug) and if it is set
5035 assign_section_numbers will create a reloc section. */
5036 o
->flags
&=~ SEC_RELOC
;
5039 /* If the SEC_ALLOC flag is not set, force the section VMA to
5040 zero. This is done in elf_fake_sections as well, but forcing
5041 the VMA to 0 here will ensure that relocs against these
5042 sections are handled correctly. */
5043 if ((o
->flags
& SEC_ALLOC
) == 0
5044 && ! o
->user_set_vma
)
5048 if (! info
->relocateable
&& merged
)
5049 elf_link_hash_traverse (elf_hash_table (info
),
5050 elf_link_sec_merge_syms
, (PTR
) abfd
);
5052 /* Figure out the file positions for everything but the symbol table
5053 and the relocs. We set symcount to force assign_section_numbers
5054 to create a symbol table. */
5055 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
5056 BFD_ASSERT (! abfd
->output_has_begun
);
5057 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
5060 /* Figure out how many relocations we will have in each section.
5061 Just using RELOC_COUNT isn't good enough since that doesn't
5062 maintain a separate value for REL vs. RELA relocations. */
5064 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5065 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5067 asection
*output_section
;
5069 if (! o
->linker_mark
)
5071 /* This section was omitted from the link. */
5075 output_section
= o
->output_section
;
5077 if (output_section
!= NULL
5078 && (o
->flags
& SEC_RELOC
) != 0)
5080 struct bfd_elf_section_data
*esdi
5081 = elf_section_data (o
);
5082 struct bfd_elf_section_data
*esdo
5083 = elf_section_data (output_section
);
5084 unsigned int *rel_count
;
5085 unsigned int *rel_count2
;
5086 bfd_size_type entsize
;
5087 bfd_size_type entsize2
;
5089 /* We must be careful to add the relocations from the
5090 input section to the right output count. */
5091 entsize
= esdi
->rel_hdr
.sh_entsize
;
5092 entsize2
= esdi
->rel_hdr2
? esdi
->rel_hdr2
->sh_entsize
: 0;
5093 BFD_ASSERT ((entsize
== sizeof (Elf_External_Rel
)
5094 || entsize
== sizeof (Elf_External_Rela
))
5095 && entsize2
!= entsize
5097 || entsize2
== sizeof (Elf_External_Rel
)
5098 || entsize2
== sizeof (Elf_External_Rela
)));
5099 if (entsize
== esdo
->rel_hdr
.sh_entsize
)
5101 rel_count
= &esdo
->rel_count
;
5102 rel_count2
= &esdo
->rel_count2
;
5106 rel_count
= &esdo
->rel_count2
;
5107 rel_count2
= &esdo
->rel_count
;
5110 *rel_count
+= NUM_SHDR_ENTRIES (& esdi
->rel_hdr
);
5112 *rel_count2
+= NUM_SHDR_ENTRIES (esdi
->rel_hdr2
);
5113 output_section
->flags
|= SEC_RELOC
;
5117 /* That created the reloc sections. Set their sizes, and assign
5118 them file positions, and allocate some buffers. */
5119 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5121 if ((o
->flags
& SEC_RELOC
) != 0)
5123 if (!elf_link_size_reloc_section (abfd
,
5124 &elf_section_data (o
)->rel_hdr
,
5128 if (elf_section_data (o
)->rel_hdr2
5129 && !elf_link_size_reloc_section (abfd
,
5130 elf_section_data (o
)->rel_hdr2
,
5135 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
5136 to count upwards while actually outputting the relocations. */
5137 elf_section_data (o
)->rel_count
= 0;
5138 elf_section_data (o
)->rel_count2
= 0;
5141 _bfd_elf_assign_file_positions_for_relocs (abfd
);
5143 /* We have now assigned file positions for all the sections except
5144 .symtab and .strtab. We start the .symtab section at the current
5145 file position, and write directly to it. We build the .strtab
5146 section in memory. */
5147 bfd_get_symcount (abfd
) = 0;
5148 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5149 /* sh_name is set in prep_headers. */
5150 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5151 /* sh_flags, sh_addr and sh_size all start off zero. */
5152 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
5153 /* sh_link is set in assign_section_numbers. */
5154 /* sh_info is set below. */
5155 /* sh_offset is set just below. */
5156 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
5158 off
= elf_tdata (abfd
)->next_file_pos
;
5159 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
5161 /* Note that at this point elf_tdata (abfd)->next_file_pos is
5162 incorrect. We do not yet know the size of the .symtab section.
5163 We correct next_file_pos below, after we do know the size. */
5165 /* Allocate a buffer to hold swapped out symbols. This is to avoid
5166 continuously seeking to the right position in the file. */
5167 if (! info
->keep_memory
|| max_sym_count
< 20)
5168 finfo
.symbuf_size
= 20;
5170 finfo
.symbuf_size
= max_sym_count
;
5171 amt
= finfo
.symbuf_size
;
5172 amt
*= sizeof (Elf_External_Sym
);
5173 finfo
.symbuf
= (Elf_External_Sym
*) bfd_malloc (amt
);
5174 if (finfo
.symbuf
== NULL
)
5176 if (elf_numsections (abfd
) > SHN_LORESERVE
)
5178 /* Wild guess at number of output symbols. realloc'd as needed. */
5179 amt
= 2 * max_sym_count
+ elf_numsections (abfd
) + 1000;
5180 finfo
.shndxbuf_size
= amt
;
5181 amt
*= sizeof (Elf_External_Sym_Shndx
);
5182 finfo
.symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
5183 if (finfo
.symshndxbuf
== NULL
)
5187 /* Start writing out the symbol table. The first symbol is always a
5189 if (info
->strip
!= strip_all
5192 elfsym
.st_value
= 0;
5195 elfsym
.st_other
= 0;
5196 elfsym
.st_shndx
= SHN_UNDEF
;
5197 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
5198 &elfsym
, bfd_und_section_ptr
))
5203 /* Some standard ELF linkers do this, but we don't because it causes
5204 bootstrap comparison failures. */
5205 /* Output a file symbol for the output file as the second symbol.
5206 We output this even if we are discarding local symbols, although
5207 I'm not sure if this is correct. */
5208 elfsym
.st_value
= 0;
5210 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5211 elfsym
.st_other
= 0;
5212 elfsym
.st_shndx
= SHN_ABS
;
5213 if (! elf_link_output_sym (&finfo
, bfd_get_filename (abfd
),
5214 &elfsym
, bfd_abs_section_ptr
))
5218 /* Output a symbol for each section. We output these even if we are
5219 discarding local symbols, since they are used for relocs. These
5220 symbols have no names. We store the index of each one in the
5221 index field of the section, so that we can find it again when
5222 outputting relocs. */
5223 if (info
->strip
!= strip_all
5227 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5228 elfsym
.st_other
= 0;
5229 for (i
= 1; i
< elf_numsections (abfd
); i
++)
5231 o
= section_from_elf_index (abfd
, i
);
5233 o
->target_index
= bfd_get_symcount (abfd
);
5234 elfsym
.st_shndx
= i
;
5235 if (info
->relocateable
|| o
== NULL
)
5236 elfsym
.st_value
= 0;
5238 elfsym
.st_value
= o
->vma
;
5239 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
5242 if (i
== SHN_LORESERVE
- 1)
5243 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
5247 /* Allocate some memory to hold information read in from the input
5249 if (max_contents_size
!= 0)
5251 finfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5252 if (finfo
.contents
== NULL
)
5256 if (max_external_reloc_size
!= 0)
5258 finfo
.external_relocs
= (PTR
) bfd_malloc (max_external_reloc_size
);
5259 if (finfo
.external_relocs
== NULL
)
5263 if (max_internal_reloc_count
!= 0)
5265 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
5266 amt
*= sizeof (Elf_Internal_Rela
);
5267 finfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
5268 if (finfo
.internal_relocs
== NULL
)
5272 if (max_sym_count
!= 0)
5274 amt
= max_sym_count
* sizeof (Elf_External_Sym
);
5275 finfo
.external_syms
= (Elf_External_Sym
*) bfd_malloc (amt
);
5276 if (finfo
.external_syms
== NULL
)
5279 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
5280 finfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
5281 if (finfo
.internal_syms
== NULL
)
5284 amt
= max_sym_count
* sizeof (long);
5285 finfo
.indices
= (long *) bfd_malloc (amt
);
5286 if (finfo
.indices
== NULL
)
5289 amt
= max_sym_count
* sizeof (asection
*);
5290 finfo
.sections
= (asection
**) bfd_malloc (amt
);
5291 if (finfo
.sections
== NULL
)
5295 if (max_sym_shndx_count
!= 0)
5297 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
5298 finfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
5299 if (finfo
.locsym_shndx
== NULL
)
5303 if (finfo
.first_tls_sec
)
5305 unsigned int align
= 0;
5306 bfd_vma base
= finfo
.first_tls_sec
->vma
, end
= 0;
5309 for (sec
= finfo
.first_tls_sec
;
5310 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
5313 bfd_vma size
= sec
->_raw_size
;
5315 if (bfd_get_section_alignment (abfd
, sec
) > align
)
5316 align
= bfd_get_section_alignment (abfd
, sec
);
5317 if (sec
->_raw_size
== 0 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
5319 struct bfd_link_order
*o
;
5322 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
5323 if (size
< o
->offset
+ o
->size
)
5324 size
= o
->offset
+ o
->size
;
5326 end
= sec
->vma
+ size
;
5328 elf_hash_table (info
)->tls_segment
5329 = bfd_zalloc (abfd
, sizeof (struct elf_link_tls_segment
));
5330 if (elf_hash_table (info
)->tls_segment
== NULL
)
5332 elf_hash_table (info
)->tls_segment
->start
= base
;
5333 elf_hash_table (info
)->tls_segment
->size
= end
- base
;
5334 elf_hash_table (info
)->tls_segment
->align
= align
;
5337 /* Since ELF permits relocations to be against local symbols, we
5338 must have the local symbols available when we do the relocations.
5339 Since we would rather only read the local symbols once, and we
5340 would rather not keep them in memory, we handle all the
5341 relocations for a single input file at the same time.
5343 Unfortunately, there is no way to know the total number of local
5344 symbols until we have seen all of them, and the local symbol
5345 indices precede the global symbol indices. This means that when
5346 we are generating relocateable output, and we see a reloc against
5347 a global symbol, we can not know the symbol index until we have
5348 finished examining all the local symbols to see which ones we are
5349 going to output. To deal with this, we keep the relocations in
5350 memory, and don't output them until the end of the link. This is
5351 an unfortunate waste of memory, but I don't see a good way around
5352 it. Fortunately, it only happens when performing a relocateable
5353 link, which is not the common case. FIXME: If keep_memory is set
5354 we could write the relocs out and then read them again; I don't
5355 know how bad the memory loss will be. */
5357 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5358 sub
->output_has_begun
= FALSE
;
5359 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5361 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
5363 if (p
->type
== bfd_indirect_link_order
5364 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
5365 == bfd_target_elf_flavour
)
5366 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
5368 if (! sub
->output_has_begun
)
5370 if (! elf_link_input_bfd (&finfo
, sub
))
5372 sub
->output_has_begun
= TRUE
;
5375 else if (p
->type
== bfd_section_reloc_link_order
5376 || p
->type
== bfd_symbol_reloc_link_order
)
5378 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
5383 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5389 /* Output any global symbols that got converted to local in a
5390 version script or due to symbol visibility. We do this in a
5391 separate step since ELF requires all local symbols to appear
5392 prior to any global symbols. FIXME: We should only do this if
5393 some global symbols were, in fact, converted to become local.
5394 FIXME: Will this work correctly with the Irix 5 linker? */
5395 eoinfo
.failed
= FALSE
;
5396 eoinfo
.finfo
= &finfo
;
5397 eoinfo
.localsyms
= TRUE
;
5398 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
5403 /* That wrote out all the local symbols. Finish up the symbol table
5404 with the global symbols. Even if we want to strip everything we
5405 can, we still need to deal with those global symbols that got
5406 converted to local in a version script. */
5408 /* The sh_info field records the index of the first non local symbol. */
5409 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
5412 && finfo
.dynsym_sec
->output_section
!= bfd_abs_section_ptr
)
5414 Elf_Internal_Sym sym
;
5415 Elf_External_Sym
*dynsym
=
5416 (Elf_External_Sym
*) finfo
.dynsym_sec
->contents
;
5417 long last_local
= 0;
5419 /* Write out the section symbols for the output sections. */
5426 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5429 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5432 Elf_External_Sym
*dest
;
5434 indx
= elf_section_data (s
)->this_idx
;
5435 BFD_ASSERT (indx
> 0);
5436 sym
.st_shndx
= indx
;
5437 sym
.st_value
= s
->vma
;
5438 dest
= dynsym
+ elf_section_data (s
)->dynindx
;
5439 elf_swap_symbol_out (abfd
, &sym
, (PTR
) dest
, (PTR
) 0);
5442 last_local
= bfd_count_sections (abfd
);
5445 /* Write out the local dynsyms. */
5446 if (elf_hash_table (info
)->dynlocal
)
5448 struct elf_link_local_dynamic_entry
*e
;
5449 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
5452 Elf_External_Sym
*dest
;
5454 sym
.st_size
= e
->isym
.st_size
;
5455 sym
.st_other
= e
->isym
.st_other
;
5457 /* Copy the internal symbol as is.
5458 Note that we saved a word of storage and overwrote
5459 the original st_name with the dynstr_index. */
5462 if (e
->isym
.st_shndx
!= SHN_UNDEF
5463 && (e
->isym
.st_shndx
< SHN_LORESERVE
5464 || e
->isym
.st_shndx
> SHN_HIRESERVE
))
5466 s
= bfd_section_from_elf_index (e
->input_bfd
,
5470 elf_section_data (s
->output_section
)->this_idx
;
5471 sym
.st_value
= (s
->output_section
->vma
5473 + e
->isym
.st_value
);
5476 if (last_local
< e
->dynindx
)
5477 last_local
= e
->dynindx
;
5479 dest
= dynsym
+ e
->dynindx
;
5480 elf_swap_symbol_out (abfd
, &sym
, (PTR
) dest
, (PTR
) 0);
5484 elf_section_data (finfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
5488 /* We get the global symbols from the hash table. */
5489 eoinfo
.failed
= FALSE
;
5490 eoinfo
.localsyms
= FALSE
;
5491 eoinfo
.finfo
= &finfo
;
5492 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
5497 /* If backend needs to output some symbols not present in the hash
5498 table, do it now. */
5499 if (bed
->elf_backend_output_arch_syms
)
5501 typedef bfd_boolean (*out_sym_func
)
5502 PARAMS ((PTR
, const char *, Elf_Internal_Sym
*, asection
*));
5504 if (! ((*bed
->elf_backend_output_arch_syms
)
5505 (abfd
, info
, (PTR
) &finfo
, (out_sym_func
) elf_link_output_sym
)))
5509 /* Flush all symbols to the file. */
5510 if (! elf_link_flush_output_syms (&finfo
))
5513 /* Now we know the size of the symtab section. */
5514 off
+= symtab_hdr
->sh_size
;
5516 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5517 if (symtab_shndx_hdr
->sh_name
!= 0)
5519 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5520 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5521 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5522 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
5523 symtab_shndx_hdr
->sh_size
= amt
;
5525 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
5528 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
5529 || (bfd_bwrite ((PTR
) finfo
.symshndxbuf
, amt
, abfd
) != amt
))
5534 /* Finish up and write out the symbol string table (.strtab)
5536 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5537 /* sh_name was set in prep_headers. */
5538 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5539 symstrtab_hdr
->sh_flags
= 0;
5540 symstrtab_hdr
->sh_addr
= 0;
5541 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (finfo
.symstrtab
);
5542 symstrtab_hdr
->sh_entsize
= 0;
5543 symstrtab_hdr
->sh_link
= 0;
5544 symstrtab_hdr
->sh_info
= 0;
5545 /* sh_offset is set just below. */
5546 symstrtab_hdr
->sh_addralign
= 1;
5548 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, TRUE
);
5549 elf_tdata (abfd
)->next_file_pos
= off
;
5551 if (bfd_get_symcount (abfd
) > 0)
5553 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
5554 || ! _bfd_stringtab_emit (abfd
, finfo
.symstrtab
))
5558 /* Adjust the relocs to have the correct symbol indices. */
5559 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5561 if ((o
->flags
& SEC_RELOC
) == 0)
5564 elf_link_adjust_relocs (abfd
, &elf_section_data (o
)->rel_hdr
,
5565 elf_section_data (o
)->rel_count
,
5566 elf_section_data (o
)->rel_hashes
);
5567 if (elf_section_data (o
)->rel_hdr2
!= NULL
)
5568 elf_link_adjust_relocs (abfd
, elf_section_data (o
)->rel_hdr2
,
5569 elf_section_data (o
)->rel_count2
,
5570 (elf_section_data (o
)->rel_hashes
5571 + elf_section_data (o
)->rel_count
));
5573 /* Set the reloc_count field to 0 to prevent write_relocs from
5574 trying to swap the relocs out itself. */
5578 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
5579 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
5581 /* If we are linking against a dynamic object, or generating a
5582 shared library, finish up the dynamic linking information. */
5585 Elf_External_Dyn
*dyncon
, *dynconend
;
5587 /* Fix up .dynamic entries. */
5588 o
= bfd_get_section_by_name (dynobj
, ".dynamic");
5589 BFD_ASSERT (o
!= NULL
);
5591 dyncon
= (Elf_External_Dyn
*) o
->contents
;
5592 dynconend
= (Elf_External_Dyn
*) (o
->contents
+ o
->_raw_size
);
5593 for (; dyncon
< dynconend
; dyncon
++)
5595 Elf_Internal_Dyn dyn
;
5599 elf_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5606 if (relativecount
> 0 && dyncon
+ 1 < dynconend
)
5608 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
5610 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
5611 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
5614 if (dyn
.d_tag
!= DT_NULL
)
5616 dyn
.d_un
.d_val
= relativecount
;
5617 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5623 name
= info
->init_function
;
5626 name
= info
->fini_function
;
5629 struct elf_link_hash_entry
*h
;
5631 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
5632 FALSE
, FALSE
, TRUE
);
5634 && (h
->root
.type
== bfd_link_hash_defined
5635 || h
->root
.type
== bfd_link_hash_defweak
))
5637 dyn
.d_un
.d_val
= h
->root
.u
.def
.value
;
5638 o
= h
->root
.u
.def
.section
;
5639 if (o
->output_section
!= NULL
)
5640 dyn
.d_un
.d_val
+= (o
->output_section
->vma
5641 + o
->output_offset
);
5644 /* The symbol is imported from another shared
5645 library and does not apply to this one. */
5649 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5654 case DT_PREINIT_ARRAYSZ
:
5655 name
= ".preinit_array";
5657 case DT_INIT_ARRAYSZ
:
5658 name
= ".init_array";
5660 case DT_FINI_ARRAYSZ
:
5661 name
= ".fini_array";
5663 o
= bfd_get_section_by_name (abfd
, name
);
5666 (*_bfd_error_handler
)
5667 (_("%s: could not find output section %s"),
5668 bfd_get_filename (abfd
), name
);
5671 if (o
->_raw_size
== 0)
5672 (*_bfd_error_handler
)
5673 (_("warning: %s section has zero size"), name
);
5674 dyn
.d_un
.d_val
= o
->_raw_size
;
5675 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5678 case DT_PREINIT_ARRAY
:
5679 name
= ".preinit_array";
5682 name
= ".init_array";
5685 name
= ".fini_array";
5698 name
= ".gnu.version_d";
5701 name
= ".gnu.version_r";
5704 name
= ".gnu.version";
5706 o
= bfd_get_section_by_name (abfd
, name
);
5709 (*_bfd_error_handler
)
5710 (_("%s: could not find output section %s"),
5711 bfd_get_filename (abfd
), name
);
5714 dyn
.d_un
.d_ptr
= o
->vma
;
5715 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5722 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
5727 for (i
= 1; i
< elf_numsections (abfd
); i
++)
5729 Elf_Internal_Shdr
*hdr
;
5731 hdr
= elf_elfsections (abfd
)[i
];
5732 if (hdr
->sh_type
== type
5733 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
5735 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
5736 dyn
.d_un
.d_val
+= hdr
->sh_size
;
5739 if (dyn
.d_un
.d_val
== 0
5740 || hdr
->sh_addr
< dyn
.d_un
.d_val
)
5741 dyn
.d_un
.d_val
= hdr
->sh_addr
;
5745 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5751 /* If we have created any dynamic sections, then output them. */
5754 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
5757 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
5759 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
5760 || o
->_raw_size
== 0
5761 || o
->output_section
== bfd_abs_section_ptr
)
5763 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
5765 /* At this point, we are only interested in sections
5766 created by elf_link_create_dynamic_sections. */
5769 if ((elf_section_data (o
->output_section
)->this_hdr
.sh_type
5771 || strcmp (bfd_get_section_name (abfd
, o
), ".dynstr") != 0)
5773 if (! bfd_set_section_contents (abfd
, o
->output_section
,
5775 (file_ptr
) o
->output_offset
,
5781 /* The contents of the .dynstr section are actually in a
5783 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
5784 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
5785 || ! _bfd_elf_strtab_emit (abfd
,
5786 elf_hash_table (info
)->dynstr
))
5792 if (info
->relocateable
)
5794 bfd_boolean failed
= FALSE
;
5796 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
5801 /* If we have optimized stabs strings, output them. */
5802 if (elf_hash_table (info
)->stab_info
!= NULL
)
5804 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
5808 if (info
->eh_frame_hdr
)
5810 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
5814 if (finfo
.symstrtab
!= NULL
)
5815 _bfd_stringtab_free (finfo
.symstrtab
);
5816 if (finfo
.contents
!= NULL
)
5817 free (finfo
.contents
);
5818 if (finfo
.external_relocs
!= NULL
)
5819 free (finfo
.external_relocs
);
5820 if (finfo
.internal_relocs
!= NULL
)
5821 free (finfo
.internal_relocs
);
5822 if (finfo
.external_syms
!= NULL
)
5823 free (finfo
.external_syms
);
5824 if (finfo
.locsym_shndx
!= NULL
)
5825 free (finfo
.locsym_shndx
);
5826 if (finfo
.internal_syms
!= NULL
)
5827 free (finfo
.internal_syms
);
5828 if (finfo
.indices
!= NULL
)
5829 free (finfo
.indices
);
5830 if (finfo
.sections
!= NULL
)
5831 free (finfo
.sections
);
5832 if (finfo
.symbuf
!= NULL
)
5833 free (finfo
.symbuf
);
5834 if (finfo
.symshndxbuf
!= NULL
)
5835 free (finfo
.symshndxbuf
);
5836 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5838 if ((o
->flags
& SEC_RELOC
) != 0
5839 && elf_section_data (o
)->rel_hashes
!= NULL
)
5840 free (elf_section_data (o
)->rel_hashes
);
5843 elf_tdata (abfd
)->linker
= TRUE
;
5848 if (finfo
.symstrtab
!= NULL
)
5849 _bfd_stringtab_free (finfo
.symstrtab
);
5850 if (finfo
.contents
!= NULL
)
5851 free (finfo
.contents
);
5852 if (finfo
.external_relocs
!= NULL
)
5853 free (finfo
.external_relocs
);
5854 if (finfo
.internal_relocs
!= NULL
)
5855 free (finfo
.internal_relocs
);
5856 if (finfo
.external_syms
!= NULL
)
5857 free (finfo
.external_syms
);
5858 if (finfo
.locsym_shndx
!= NULL
)
5859 free (finfo
.locsym_shndx
);
5860 if (finfo
.internal_syms
!= NULL
)
5861 free (finfo
.internal_syms
);
5862 if (finfo
.indices
!= NULL
)
5863 free (finfo
.indices
);
5864 if (finfo
.sections
!= NULL
)
5865 free (finfo
.sections
);
5866 if (finfo
.symbuf
!= NULL
)
5867 free (finfo
.symbuf
);
5868 if (finfo
.symshndxbuf
!= NULL
)
5869 free (finfo
.symshndxbuf
);
5870 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5872 if ((o
->flags
& SEC_RELOC
) != 0
5873 && elf_section_data (o
)->rel_hashes
!= NULL
)
5874 free (elf_section_data (o
)->rel_hashes
);
5880 /* Add a symbol to the output symbol table. */
5883 elf_link_output_sym (finfo
, name
, elfsym
, input_sec
)
5884 struct elf_final_link_info
*finfo
;
5886 Elf_Internal_Sym
*elfsym
;
5887 asection
*input_sec
;
5889 Elf_External_Sym
*dest
;
5890 Elf_External_Sym_Shndx
*destshndx
;
5891 bfd_boolean (*output_symbol_hook
)
5892 PARAMS ((bfd
*, struct bfd_link_info
*info
, const char *,
5893 Elf_Internal_Sym
*, asection
*));
5895 output_symbol_hook
= get_elf_backend_data (finfo
->output_bfd
)->
5896 elf_backend_link_output_symbol_hook
;
5897 if (output_symbol_hook
!= NULL
)
5899 if (! ((*output_symbol_hook
)
5900 (finfo
->output_bfd
, finfo
->info
, name
, elfsym
, input_sec
)))
5904 if (name
== (const char *) NULL
|| *name
== '\0')
5905 elfsym
->st_name
= 0;
5906 else if (input_sec
->flags
& SEC_EXCLUDE
)
5907 elfsym
->st_name
= 0;
5910 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (finfo
->symstrtab
,
5912 if (elfsym
->st_name
== (unsigned long) -1)
5916 if (finfo
->symbuf_count
>= finfo
->symbuf_size
)
5918 if (! elf_link_flush_output_syms (finfo
))
5922 dest
= finfo
->symbuf
+ finfo
->symbuf_count
;
5923 destshndx
= finfo
->symshndxbuf
;
5924 if (destshndx
!= NULL
)
5926 if (bfd_get_symcount (finfo
->output_bfd
) >= finfo
->shndxbuf_size
)
5930 amt
= finfo
->shndxbuf_size
* sizeof (Elf_External_Sym_Shndx
);
5931 finfo
->symshndxbuf
= destshndx
= bfd_realloc (destshndx
, amt
* 2);
5932 if (destshndx
== NULL
)
5934 memset ((char *) destshndx
+ amt
, 0, amt
);
5935 finfo
->shndxbuf_size
*= 2;
5937 destshndx
+= bfd_get_symcount (finfo
->output_bfd
);
5940 elf_swap_symbol_out (finfo
->output_bfd
, elfsym
, (PTR
) dest
, (PTR
) destshndx
);
5941 finfo
->symbuf_count
+= 1;
5942 bfd_get_symcount (finfo
->output_bfd
) += 1;
5947 /* Flush the output symbols to the file. */
5950 elf_link_flush_output_syms (finfo
)
5951 struct elf_final_link_info
*finfo
;
5953 if (finfo
->symbuf_count
> 0)
5955 Elf_Internal_Shdr
*hdr
;
5959 hdr
= &elf_tdata (finfo
->output_bfd
)->symtab_hdr
;
5960 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
5961 amt
= finfo
->symbuf_count
* sizeof (Elf_External_Sym
);
5962 if (bfd_seek (finfo
->output_bfd
, pos
, SEEK_SET
) != 0
5963 || bfd_bwrite ((PTR
) finfo
->symbuf
, amt
, finfo
->output_bfd
) != amt
)
5966 hdr
->sh_size
+= amt
;
5967 finfo
->symbuf_count
= 0;
5973 /* Adjust all external symbols pointing into SEC_MERGE sections
5974 to reflect the object merging within the sections. */
5977 elf_link_sec_merge_syms (h
, data
)
5978 struct elf_link_hash_entry
*h
;
5983 if (h
->root
.type
== bfd_link_hash_warning
)
5984 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5986 if ((h
->root
.type
== bfd_link_hash_defined
5987 || h
->root
.type
== bfd_link_hash_defweak
)
5988 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
5989 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
5991 bfd
*output_bfd
= (bfd
*) data
;
5993 h
->root
.u
.def
.value
=
5994 _bfd_merged_section_offset (output_bfd
,
5995 &h
->root
.u
.def
.section
,
5996 elf_section_data (sec
)->sec_info
,
5997 h
->root
.u
.def
.value
, (bfd_vma
) 0);
6003 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
6004 allowing an unsatisfied unversioned symbol in the DSO to match a
6005 versioned symbol that would normally require an explicit version. */
6008 elf_link_check_versioned_symbol (info
, h
)
6009 struct bfd_link_info
*info
;
6010 struct elf_link_hash_entry
*h
;
6012 bfd
*undef_bfd
= h
->root
.u
.undef
.abfd
;
6013 struct elf_link_loaded_list
*loaded
;
6015 if ((undef_bfd
->flags
& DYNAMIC
) == 0
6016 || info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
6017 || elf_dt_soname (h
->root
.u
.undef
.abfd
) == NULL
)
6020 for (loaded
= elf_hash_table (info
)->loaded
;
6022 loaded
= loaded
->next
)
6025 Elf_Internal_Shdr
*hdr
;
6026 bfd_size_type symcount
;
6027 bfd_size_type extsymcount
;
6028 bfd_size_type extsymoff
;
6029 Elf_Internal_Shdr
*versymhdr
;
6030 Elf_Internal_Sym
*isym
;
6031 Elf_Internal_Sym
*isymend
;
6032 Elf_Internal_Sym
*isymbuf
;
6033 Elf_External_Versym
*ever
;
6034 Elf_External_Versym
*extversym
;
6036 input
= loaded
->abfd
;
6038 /* We check each DSO for a possible hidden versioned definition. */
6039 if (input
== undef_bfd
6040 || (input
->flags
& DYNAMIC
) == 0
6041 || elf_dynversym (input
) == 0)
6044 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
6046 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6047 if (elf_bad_symtab (input
))
6049 extsymcount
= symcount
;
6054 extsymcount
= symcount
- hdr
->sh_info
;
6055 extsymoff
= hdr
->sh_info
;
6058 if (extsymcount
== 0)
6061 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
6063 if (isymbuf
== NULL
)
6066 /* Read in any version definitions. */
6067 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
6068 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
6069 if (extversym
== NULL
)
6072 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
6073 || (bfd_bread ((PTR
) extversym
, versymhdr
->sh_size
, input
)
6074 != versymhdr
->sh_size
))
6082 ever
= extversym
+ extsymoff
;
6083 isymend
= isymbuf
+ extsymcount
;
6084 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
6087 Elf_Internal_Versym iver
;
6089 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
6090 || isym
->st_shndx
== SHN_UNDEF
)
6093 name
= bfd_elf_string_from_elf_section (input
,
6096 if (strcmp (name
, h
->root
.root
.string
) != 0)
6099 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
6101 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0)
6103 /* If we have a non-hidden versioned sym, then it should
6104 have provided a definition for the undefined sym. */
6108 if ((iver
.vs_vers
& VERSYM_VERSION
) == 2)
6110 /* This is the oldest (default) sym. We can use it. */
6124 /* Add an external symbol to the symbol table. This is called from
6125 the hash table traversal routine. When generating a shared object,
6126 we go through the symbol table twice. The first time we output
6127 anything that might have been forced to local scope in a version
6128 script. The second time we output the symbols that are still
6132 elf_link_output_extsym (h
, data
)
6133 struct elf_link_hash_entry
*h
;
6136 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
6137 struct elf_final_link_info
*finfo
= eoinfo
->finfo
;
6139 Elf_Internal_Sym sym
;
6140 asection
*input_sec
;
6142 if (h
->root
.type
== bfd_link_hash_warning
)
6144 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6145 if (h
->root
.type
== bfd_link_hash_new
)
6149 /* Decide whether to output this symbol in this pass. */
6150 if (eoinfo
->localsyms
)
6152 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
6157 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
6161 /* If we are not creating a shared library, and this symbol is
6162 referenced by a shared library but is not defined anywhere, then
6163 warn that it is undefined. If we do not do this, the runtime
6164 linker will complain that the symbol is undefined when the
6165 program is run. We don't have to worry about symbols that are
6166 referenced by regular files, because we will already have issued
6167 warnings for them. */
6168 if (! finfo
->info
->relocateable
6169 && (! finfo
->info
->shared
|| ! finfo
->info
->allow_shlib_undefined
)
6170 && h
->root
.type
== bfd_link_hash_undefined
6171 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0
6172 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0
6173 && ! elf_link_check_versioned_symbol (finfo
->info
, h
))
6175 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
6176 (finfo
->info
, h
->root
.root
.string
, h
->root
.u
.undef
.abfd
,
6177 (asection
*) NULL
, (bfd_vma
) 0, TRUE
)))
6179 eoinfo
->failed
= TRUE
;
6184 /* We don't want to output symbols that have never been mentioned by
6185 a regular file, or that we have been told to strip. However, if
6186 h->indx is set to -2, the symbol is used by a reloc and we must
6190 else if (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
6191 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0)
6192 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
6193 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0)
6195 else if (finfo
->info
->strip
== strip_all
)
6197 else if (finfo
->info
->strip
== strip_some
6198 && bfd_hash_lookup (finfo
->info
->keep_hash
,
6199 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
6201 else if (finfo
->info
->strip_discarded
6202 && (h
->root
.type
== bfd_link_hash_defined
6203 || h
->root
.type
== bfd_link_hash_defweak
)
6204 && elf_discarded_section (h
->root
.u
.def
.section
))
6209 /* If we're stripping it, and it's not a dynamic symbol, there's
6210 nothing else to do unless it is a forced local symbol. */
6213 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
6217 sym
.st_size
= h
->size
;
6218 sym
.st_other
= h
->other
;
6219 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
6220 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
6221 else if (h
->root
.type
== bfd_link_hash_undefweak
6222 || h
->root
.type
== bfd_link_hash_defweak
)
6223 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
6225 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
6227 switch (h
->root
.type
)
6230 case bfd_link_hash_new
:
6231 case bfd_link_hash_warning
:
6235 case bfd_link_hash_undefined
:
6236 case bfd_link_hash_undefweak
:
6237 input_sec
= bfd_und_section_ptr
;
6238 sym
.st_shndx
= SHN_UNDEF
;
6241 case bfd_link_hash_defined
:
6242 case bfd_link_hash_defweak
:
6244 input_sec
= h
->root
.u
.def
.section
;
6245 if (input_sec
->output_section
!= NULL
)
6248 _bfd_elf_section_from_bfd_section (finfo
->output_bfd
,
6249 input_sec
->output_section
);
6250 if (sym
.st_shndx
== SHN_BAD
)
6252 (*_bfd_error_handler
)
6253 (_("%s: could not find output section %s for input section %s"),
6254 bfd_get_filename (finfo
->output_bfd
),
6255 input_sec
->output_section
->name
,
6257 eoinfo
->failed
= TRUE
;
6261 /* ELF symbols in relocateable files are section relative,
6262 but in nonrelocateable files they are virtual
6264 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
6265 if (! finfo
->info
->relocateable
)
6267 sym
.st_value
+= input_sec
->output_section
->vma
;
6268 if (h
->type
== STT_TLS
)
6270 /* STT_TLS symbols are relative to PT_TLS segment
6272 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
6273 sym
.st_value
-= finfo
->first_tls_sec
->vma
;
6279 BFD_ASSERT (input_sec
->owner
== NULL
6280 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
6281 sym
.st_shndx
= SHN_UNDEF
;
6282 input_sec
= bfd_und_section_ptr
;
6287 case bfd_link_hash_common
:
6288 input_sec
= h
->root
.u
.c
.p
->section
;
6289 sym
.st_shndx
= SHN_COMMON
;
6290 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
6293 case bfd_link_hash_indirect
:
6294 /* These symbols are created by symbol versioning. They point
6295 to the decorated version of the name. For example, if the
6296 symbol foo@@GNU_1.2 is the default, which should be used when
6297 foo is used with no version, then we add an indirect symbol
6298 foo which points to foo@@GNU_1.2. We ignore these symbols,
6299 since the indirected symbol is already in the hash table. */
6303 /* Give the processor backend a chance to tweak the symbol value,
6304 and also to finish up anything that needs to be done for this
6305 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
6306 forced local syms when non-shared is due to a historical quirk. */
6307 if ((h
->dynindx
!= -1
6308 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
6309 && (finfo
->info
->shared
6310 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
6311 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
6313 struct elf_backend_data
*bed
;
6315 bed
= get_elf_backend_data (finfo
->output_bfd
);
6316 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
6317 (finfo
->output_bfd
, finfo
->info
, h
, &sym
)))
6319 eoinfo
->failed
= TRUE
;
6324 /* If we are marking the symbol as undefined, and there are no
6325 non-weak references to this symbol from a regular object, then
6326 mark the symbol as weak undefined; if there are non-weak
6327 references, mark the symbol as strong. We can't do this earlier,
6328 because it might not be marked as undefined until the
6329 finish_dynamic_symbol routine gets through with it. */
6330 if (sym
.st_shndx
== SHN_UNDEF
6331 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
6332 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
6333 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
6337 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
) != 0)
6338 bindtype
= STB_GLOBAL
;
6340 bindtype
= STB_WEAK
;
6341 sym
.st_info
= ELF_ST_INFO (bindtype
, ELF_ST_TYPE (sym
.st_info
));
6344 /* If a symbol is not defined locally, we clear the visibility field. */
6345 if (! finfo
->info
->relocateable
6346 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
6347 sym
.st_other
&= ~ ELF_ST_VISIBILITY (-1);
6349 /* If this symbol should be put in the .dynsym section, then put it
6350 there now. We already know the symbol index. We also fill in
6351 the entry in the .hash section. */
6352 if (h
->dynindx
!= -1
6353 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
6357 size_t hash_entry_size
;
6358 bfd_byte
*bucketpos
;
6360 Elf_External_Sym
*esym
;
6362 sym
.st_name
= h
->dynstr_index
;
6363 esym
= (Elf_External_Sym
*) finfo
->dynsym_sec
->contents
+ h
->dynindx
;
6364 elf_swap_symbol_out (finfo
->output_bfd
, &sym
, (PTR
) esym
, (PTR
) 0);
6366 bucketcount
= elf_hash_table (finfo
->info
)->bucketcount
;
6367 bucket
= h
->elf_hash_value
% bucketcount
;
6369 = elf_section_data (finfo
->hash_sec
)->this_hdr
.sh_entsize
;
6370 bucketpos
= ((bfd_byte
*) finfo
->hash_sec
->contents
6371 + (bucket
+ 2) * hash_entry_size
);
6372 chain
= bfd_get (8 * hash_entry_size
, finfo
->output_bfd
, bucketpos
);
6373 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, (bfd_vma
) h
->dynindx
,
6375 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, chain
,
6376 ((bfd_byte
*) finfo
->hash_sec
->contents
6377 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
6379 if (finfo
->symver_sec
!= NULL
&& finfo
->symver_sec
->contents
!= NULL
)
6381 Elf_Internal_Versym iversym
;
6382 Elf_External_Versym
*eversym
;
6384 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
6386 if (h
->verinfo
.verdef
== NULL
)
6387 iversym
.vs_vers
= 0;
6389 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
6393 if (h
->verinfo
.vertree
== NULL
)
6394 iversym
.vs_vers
= 1;
6396 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
6399 if ((h
->elf_link_hash_flags
& ELF_LINK_HIDDEN
) != 0)
6400 iversym
.vs_vers
|= VERSYM_HIDDEN
;
6402 eversym
= (Elf_External_Versym
*) finfo
->symver_sec
->contents
;
6403 eversym
+= h
->dynindx
;
6404 _bfd_elf_swap_versym_out (finfo
->output_bfd
, &iversym
, eversym
);
6408 /* If we're stripping it, then it was just a dynamic symbol, and
6409 there's nothing else to do. */
6410 if (strip
|| (input_sec
->flags
& SEC_EXCLUDE
) != 0)
6413 h
->indx
= bfd_get_symcount (finfo
->output_bfd
);
6415 if (! elf_link_output_sym (finfo
, h
->root
.root
.string
, &sym
, input_sec
))
6417 eoinfo
->failed
= TRUE
;
6424 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
6425 originated from the section given by INPUT_REL_HDR) to the
6429 elf_link_output_relocs (output_bfd
, input_section
, input_rel_hdr
,
6432 asection
*input_section
;
6433 Elf_Internal_Shdr
*input_rel_hdr
;
6434 Elf_Internal_Rela
*internal_relocs
;
6436 Elf_Internal_Rela
*irela
;
6437 Elf_Internal_Rela
*irelaend
;
6439 Elf_Internal_Shdr
*output_rel_hdr
;
6440 asection
*output_section
;
6441 unsigned int *rel_countp
= NULL
;
6442 struct elf_backend_data
*bed
;
6443 void (*swap_out
) PARAMS ((bfd
*, const Elf_Internal_Rela
*, bfd_byte
*));
6445 output_section
= input_section
->output_section
;
6446 output_rel_hdr
= NULL
;
6448 if (elf_section_data (output_section
)->rel_hdr
.sh_entsize
6449 == input_rel_hdr
->sh_entsize
)
6451 output_rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
6452 rel_countp
= &elf_section_data (output_section
)->rel_count
;
6454 else if (elf_section_data (output_section
)->rel_hdr2
6455 && (elf_section_data (output_section
)->rel_hdr2
->sh_entsize
6456 == input_rel_hdr
->sh_entsize
))
6458 output_rel_hdr
= elf_section_data (output_section
)->rel_hdr2
;
6459 rel_countp
= &elf_section_data (output_section
)->rel_count2
;
6463 (*_bfd_error_handler
)
6464 (_("%s: relocation size mismatch in %s section %s"),
6465 bfd_get_filename (output_bfd
),
6466 bfd_archive_filename (input_section
->owner
),
6467 input_section
->name
);
6468 bfd_set_error (bfd_error_wrong_object_format
);
6472 bed
= get_elf_backend_data (output_bfd
);
6473 if (input_rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
6474 swap_out
= bed
->s
->swap_reloc_out
;
6475 else if (input_rel_hdr
->sh_entsize
== sizeof (Elf_External_Rela
))
6476 swap_out
= bed
->s
->swap_reloca_out
;
6480 erel
= output_rel_hdr
->contents
;
6481 erel
+= *rel_countp
* input_rel_hdr
->sh_entsize
;
6482 irela
= internal_relocs
;
6483 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
6484 * bed
->s
->int_rels_per_ext_rel
);
6485 while (irela
< irelaend
)
6487 (*swap_out
) (output_bfd
, irela
, erel
);
6488 irela
+= bed
->s
->int_rels_per_ext_rel
;
6489 erel
+= input_rel_hdr
->sh_entsize
;
6492 /* Bump the counter, so that we know where to add the next set of
6494 *rel_countp
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
6499 /* Link an input file into the linker output file. This function
6500 handles all the sections and relocations of the input file at once.
6501 This is so that we only have to read the local symbols once, and
6502 don't have to keep them in memory. */
6505 elf_link_input_bfd (finfo
, input_bfd
)
6506 struct elf_final_link_info
*finfo
;
6509 bfd_boolean (*relocate_section
)
6510 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
6511 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**));
6513 Elf_Internal_Shdr
*symtab_hdr
;
6516 Elf_Internal_Sym
*isymbuf
;
6517 Elf_Internal_Sym
*isym
;
6518 Elf_Internal_Sym
*isymend
;
6520 asection
**ppsection
;
6522 struct elf_backend_data
*bed
;
6523 bfd_boolean emit_relocs
;
6524 struct elf_link_hash_entry
**sym_hashes
;
6526 output_bfd
= finfo
->output_bfd
;
6527 bed
= get_elf_backend_data (output_bfd
);
6528 relocate_section
= bed
->elf_backend_relocate_section
;
6530 /* If this is a dynamic object, we don't want to do anything here:
6531 we don't want the local symbols, and we don't want the section
6533 if ((input_bfd
->flags
& DYNAMIC
) != 0)
6536 emit_relocs
= (finfo
->info
->relocateable
6537 || finfo
->info
->emitrelocations
6538 || bed
->elf_backend_emit_relocs
);
6540 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
6541 if (elf_bad_symtab (input_bfd
))
6543 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6548 locsymcount
= symtab_hdr
->sh_info
;
6549 extsymoff
= symtab_hdr
->sh_info
;
6552 /* Read the local symbols. */
6553 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
6554 if (isymbuf
== NULL
&& locsymcount
!= 0)
6556 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
6557 finfo
->internal_syms
,
6558 finfo
->external_syms
,
6559 finfo
->locsym_shndx
);
6560 if (isymbuf
== NULL
)
6564 /* Find local symbol sections and adjust values of symbols in
6565 SEC_MERGE sections. Write out those local symbols we know are
6566 going into the output file. */
6567 isymend
= isymbuf
+ locsymcount
;
6568 for (isym
= isymbuf
, pindex
= finfo
->indices
, ppsection
= finfo
->sections
;
6570 isym
++, pindex
++, ppsection
++)
6574 Elf_Internal_Sym osym
;
6578 if (elf_bad_symtab (input_bfd
))
6580 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
6587 if (isym
->st_shndx
== SHN_UNDEF
)
6588 isec
= bfd_und_section_ptr
;
6589 else if (isym
->st_shndx
< SHN_LORESERVE
6590 || isym
->st_shndx
> SHN_HIRESERVE
)
6592 isec
= section_from_elf_index (input_bfd
, isym
->st_shndx
);
6594 && isec
->sec_info_type
== ELF_INFO_TYPE_MERGE
6595 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
6597 _bfd_merged_section_offset (output_bfd
, &isec
,
6598 elf_section_data (isec
)->sec_info
,
6599 isym
->st_value
, (bfd_vma
) 0);
6601 else if (isym
->st_shndx
== SHN_ABS
)
6602 isec
= bfd_abs_section_ptr
;
6603 else if (isym
->st_shndx
== SHN_COMMON
)
6604 isec
= bfd_com_section_ptr
;
6613 /* Don't output the first, undefined, symbol. */
6614 if (ppsection
== finfo
->sections
)
6617 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
6619 /* We never output section symbols. Instead, we use the
6620 section symbol of the corresponding section in the output
6625 /* If we are stripping all symbols, we don't want to output this
6627 if (finfo
->info
->strip
== strip_all
)
6630 /* If we are discarding all local symbols, we don't want to
6631 output this one. If we are generating a relocateable output
6632 file, then some of the local symbols may be required by
6633 relocs; we output them below as we discover that they are
6635 if (finfo
->info
->discard
== discard_all
)
6638 /* If this symbol is defined in a section which we are
6639 discarding, we don't need to keep it, but note that
6640 linker_mark is only reliable for sections that have contents.
6641 For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
6642 as well as linker_mark. */
6643 if ((isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
6645 && ((! isec
->linker_mark
&& (isec
->flags
& SEC_HAS_CONTENTS
) != 0)
6646 || (! finfo
->info
->relocateable
6647 && (isec
->flags
& SEC_EXCLUDE
) != 0)))
6650 /* Get the name of the symbol. */
6651 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
6656 /* See if we are discarding symbols with this name. */
6657 if ((finfo
->info
->strip
== strip_some
6658 && (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
6660 || (((finfo
->info
->discard
== discard_sec_merge
6661 && (isec
->flags
& SEC_MERGE
) && ! finfo
->info
->relocateable
)
6662 || finfo
->info
->discard
== discard_l
)
6663 && bfd_is_local_label_name (input_bfd
, name
)))
6666 /* If we get here, we are going to output this symbol. */
6670 /* Adjust the section index for the output file. */
6671 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
6672 isec
->output_section
);
6673 if (osym
.st_shndx
== SHN_BAD
)
6676 *pindex
= bfd_get_symcount (output_bfd
);
6678 /* ELF symbols in relocateable files are section relative, but
6679 in executable files they are virtual addresses. Note that
6680 this code assumes that all ELF sections have an associated
6681 BFD section with a reasonable value for output_offset; below
6682 we assume that they also have a reasonable value for
6683 output_section. Any special sections must be set up to meet
6684 these requirements. */
6685 osym
.st_value
+= isec
->output_offset
;
6686 if (! finfo
->info
->relocateable
)
6688 osym
.st_value
+= isec
->output_section
->vma
;
6689 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
6691 /* STT_TLS symbols are relative to PT_TLS segment base. */
6692 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
6693 osym
.st_value
-= finfo
->first_tls_sec
->vma
;
6697 if (! elf_link_output_sym (finfo
, name
, &osym
, isec
))
6701 /* Relocate the contents of each section. */
6702 sym_hashes
= elf_sym_hashes (input_bfd
);
6703 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
6707 if (! o
->linker_mark
)
6709 /* This section was omitted from the link. */
6713 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
6714 || (o
->_raw_size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
6717 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
6719 /* Section was created by elf_link_create_dynamic_sections
6724 /* Get the contents of the section. They have been cached by a
6725 relaxation routine. Note that o is a section in an input
6726 file, so the contents field will not have been set by any of
6727 the routines which work on output files. */
6728 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
6729 contents
= elf_section_data (o
)->this_hdr
.contents
;
6732 contents
= finfo
->contents
;
6733 if (! bfd_get_section_contents (input_bfd
, o
, contents
,
6734 (file_ptr
) 0, o
->_raw_size
))
6738 if ((o
->flags
& SEC_RELOC
) != 0)
6740 Elf_Internal_Rela
*internal_relocs
;
6742 /* Get the swapped relocs. */
6743 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
6744 (input_bfd
, o
, finfo
->external_relocs
,
6745 finfo
->internal_relocs
, FALSE
));
6746 if (internal_relocs
== NULL
6747 && o
->reloc_count
> 0)
6750 /* Run through the relocs looking for any against symbols
6751 from discarded sections and section symbols from
6752 removed link-once sections. Complain about relocs
6753 against discarded sections. Zero relocs against removed
6754 link-once sections. */
6755 if (!finfo
->info
->relocateable
6756 && !elf_section_ignore_discarded_relocs (o
))
6758 Elf_Internal_Rela
*rel
, *relend
;
6760 rel
= internal_relocs
;
6761 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
6762 for ( ; rel
< relend
; rel
++)
6764 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
6766 if (r_symndx
>= locsymcount
6767 || (elf_bad_symtab (input_bfd
)
6768 && finfo
->sections
[r_symndx
] == NULL
))
6770 struct elf_link_hash_entry
*h
;
6772 h
= sym_hashes
[r_symndx
- extsymoff
];
6773 while (h
->root
.type
== bfd_link_hash_indirect
6774 || h
->root
.type
== bfd_link_hash_warning
)
6775 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6777 /* Complain if the definition comes from a
6778 discarded section. */
6779 if ((h
->root
.type
== bfd_link_hash_defined
6780 || h
->root
.type
== bfd_link_hash_defweak
)
6781 && elf_discarded_section (h
->root
.u
.def
.section
))
6783 if ((o
->flags
& SEC_DEBUGGING
) != 0)
6785 BFD_ASSERT (r_symndx
!= 0);
6786 memset (rel
, 0, sizeof (*rel
));
6790 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
6791 (finfo
->info
, h
->root
.root
.string
,
6792 input_bfd
, o
, rel
->r_offset
,
6800 asection
*sec
= finfo
->sections
[r_symndx
];
6802 if (sec
!= NULL
&& elf_discarded_section (sec
))
6804 if ((o
->flags
& SEC_DEBUGGING
) != 0
6805 || (sec
->flags
& SEC_LINK_ONCE
) != 0)
6807 BFD_ASSERT (r_symndx
!= 0);
6809 = ELF_R_INFO (0, ELF_R_TYPE (rel
->r_info
));
6816 = _("local symbols in discarded section %s");
6818 = strlen (sec
->name
) + strlen (msg
) - 1;
6819 char *buf
= (char *) bfd_malloc (amt
);
6822 sprintf (buf
, msg
, sec
->name
);
6824 buf
= (char *) sec
->name
;
6825 ok
= (*finfo
->info
->callbacks
6826 ->undefined_symbol
) (finfo
->info
, buf
,
6830 if (buf
!= sec
->name
)
6840 /* Relocate the section by invoking a back end routine.
6842 The back end routine is responsible for adjusting the
6843 section contents as necessary, and (if using Rela relocs
6844 and generating a relocateable output file) adjusting the
6845 reloc addend as necessary.
6847 The back end routine does not have to worry about setting
6848 the reloc address or the reloc symbol index.
6850 The back end routine is given a pointer to the swapped in
6851 internal symbols, and can access the hash table entries
6852 for the external symbols via elf_sym_hashes (input_bfd).
6854 When generating relocateable output, the back end routine
6855 must handle STB_LOCAL/STT_SECTION symbols specially. The
6856 output symbol is going to be a section symbol
6857 corresponding to the output section, which will require
6858 the addend to be adjusted. */
6860 if (! (*relocate_section
) (output_bfd
, finfo
->info
,
6861 input_bfd
, o
, contents
,
6869 Elf_Internal_Rela
*irela
;
6870 Elf_Internal_Rela
*irelaend
;
6871 bfd_vma last_offset
;
6872 struct elf_link_hash_entry
**rel_hash
;
6873 Elf_Internal_Shdr
*input_rel_hdr
, *input_rel_hdr2
;
6874 unsigned int next_erel
;
6875 bfd_boolean (*reloc_emitter
)
6876 PARAMS ((bfd
*, asection
*, Elf_Internal_Shdr
*,
6877 Elf_Internal_Rela
*));
6878 bfd_boolean rela_normal
;
6880 input_rel_hdr
= &elf_section_data (o
)->rel_hdr
;
6881 rela_normal
= (bed
->rela_normal
6882 && (input_rel_hdr
->sh_entsize
6883 == sizeof (Elf_External_Rela
)));
6885 /* Adjust the reloc addresses and symbol indices. */
6887 irela
= internal_relocs
;
6888 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
6889 rel_hash
= (elf_section_data (o
->output_section
)->rel_hashes
6890 + elf_section_data (o
->output_section
)->rel_count
6891 + elf_section_data (o
->output_section
)->rel_count2
);
6892 last_offset
= o
->output_offset
;
6893 if (!finfo
->info
->relocateable
)
6894 last_offset
+= o
->output_section
->vma
;
6895 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
6897 unsigned long r_symndx
;
6899 Elf_Internal_Sym sym
;
6901 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
6907 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
6910 if (irela
->r_offset
>= (bfd_vma
) -2)
6912 /* This is a reloc for a deleted entry or somesuch.
6913 Turn it into an R_*_NONE reloc, at the same
6914 offset as the last reloc. elf_eh_frame.c and
6915 elf_bfd_discard_info rely on reloc offsets
6917 irela
->r_offset
= last_offset
;
6919 irela
->r_addend
= 0;
6923 irela
->r_offset
+= o
->output_offset
;
6925 /* Relocs in an executable have to be virtual addresses. */
6926 if (!finfo
->info
->relocateable
)
6927 irela
->r_offset
+= o
->output_section
->vma
;
6929 last_offset
= irela
->r_offset
;
6931 r_symndx
= ELF_R_SYM (irela
->r_info
);
6932 if (r_symndx
== STN_UNDEF
)
6935 if (r_symndx
>= locsymcount
6936 || (elf_bad_symtab (input_bfd
)
6937 && finfo
->sections
[r_symndx
] == NULL
))
6939 struct elf_link_hash_entry
*rh
;
6942 /* This is a reloc against a global symbol. We
6943 have not yet output all the local symbols, so
6944 we do not know the symbol index of any global
6945 symbol. We set the rel_hash entry for this
6946 reloc to point to the global hash table entry
6947 for this symbol. The symbol index is then
6948 set at the end of elf_bfd_final_link. */
6949 indx
= r_symndx
- extsymoff
;
6950 rh
= elf_sym_hashes (input_bfd
)[indx
];
6951 while (rh
->root
.type
== bfd_link_hash_indirect
6952 || rh
->root
.type
== bfd_link_hash_warning
)
6953 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
6955 /* Setting the index to -2 tells
6956 elf_link_output_extsym that this symbol is
6958 BFD_ASSERT (rh
->indx
< 0);
6966 /* This is a reloc against a local symbol. */
6969 sym
= isymbuf
[r_symndx
];
6970 sec
= finfo
->sections
[r_symndx
];
6971 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
6973 /* I suppose the backend ought to fill in the
6974 section of any STT_SECTION symbol against a
6975 processor specific section. If we have
6976 discarded a section, the output_section will
6977 be the absolute section. */
6978 if (bfd_is_abs_section (sec
)
6980 && bfd_is_abs_section (sec
->output_section
)))
6982 else if (sec
== NULL
|| sec
->owner
== NULL
)
6984 bfd_set_error (bfd_error_bad_value
);
6989 r_symndx
= sec
->output_section
->target_index
;
6990 BFD_ASSERT (r_symndx
!= 0);
6993 /* Adjust the addend according to where the
6994 section winds up in the output section. */
6996 irela
->r_addend
+= sec
->output_offset
;
7000 if (finfo
->indices
[r_symndx
] == -1)
7002 unsigned long shlink
;
7006 if (finfo
->info
->strip
== strip_all
)
7008 /* You can't do ld -r -s. */
7009 bfd_set_error (bfd_error_invalid_operation
);
7013 /* This symbol was skipped earlier, but
7014 since it is needed by a reloc, we
7015 must output it now. */
7016 shlink
= symtab_hdr
->sh_link
;
7017 name
= (bfd_elf_string_from_elf_section
7018 (input_bfd
, shlink
, sym
.st_name
));
7022 osec
= sec
->output_section
;
7024 _bfd_elf_section_from_bfd_section (output_bfd
,
7026 if (sym
.st_shndx
== SHN_BAD
)
7029 sym
.st_value
+= sec
->output_offset
;
7030 if (! finfo
->info
->relocateable
)
7032 sym
.st_value
+= osec
->vma
;
7033 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
7035 /* STT_TLS symbols are relative to PT_TLS
7037 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
7038 sym
.st_value
-= finfo
->first_tls_sec
->vma
;
7042 finfo
->indices
[r_symndx
]
7043 = bfd_get_symcount (output_bfd
);
7045 if (! elf_link_output_sym (finfo
, name
, &sym
, sec
))
7049 r_symndx
= finfo
->indices
[r_symndx
];
7052 irela
->r_info
= ELF_R_INFO (r_symndx
,
7053 ELF_R_TYPE (irela
->r_info
));
7056 /* Swap out the relocs. */
7057 if (bed
->elf_backend_emit_relocs
7058 && !(finfo
->info
->relocateable
7059 || finfo
->info
->emitrelocations
))
7060 reloc_emitter
= bed
->elf_backend_emit_relocs
;
7062 reloc_emitter
= elf_link_output_relocs
;
7064 if (input_rel_hdr
->sh_size
!= 0
7065 && ! (*reloc_emitter
) (output_bfd
, o
, input_rel_hdr
,
7069 input_rel_hdr2
= elf_section_data (o
)->rel_hdr2
;
7070 if (input_rel_hdr2
&& input_rel_hdr2
->sh_size
!= 0)
7072 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
7073 * bed
->s
->int_rels_per_ext_rel
);
7074 if (! (*reloc_emitter
) (output_bfd
, o
, input_rel_hdr2
,
7081 /* Write out the modified section contents. */
7082 if (bed
->elf_backend_write_section
7083 && (*bed
->elf_backend_write_section
) (output_bfd
, o
, contents
))
7085 /* Section written out. */
7087 else switch (o
->sec_info_type
)
7089 case ELF_INFO_TYPE_STABS
:
7090 if (! (_bfd_write_section_stabs
7092 &elf_hash_table (finfo
->info
)->stab_info
,
7093 o
, &elf_section_data (o
)->sec_info
, contents
)))
7096 case ELF_INFO_TYPE_MERGE
:
7097 if (! _bfd_write_merged_section (output_bfd
, o
,
7098 elf_section_data (o
)->sec_info
))
7101 case ELF_INFO_TYPE_EH_FRAME
:
7103 if (! _bfd_elf_write_section_eh_frame (output_bfd
, finfo
->info
,
7110 bfd_size_type sec_size
;
7112 sec_size
= (o
->_cooked_size
!= 0 ? o
->_cooked_size
: o
->_raw_size
);
7113 if (! (o
->flags
& SEC_EXCLUDE
)
7114 && ! bfd_set_section_contents (output_bfd
, o
->output_section
,
7116 (file_ptr
) o
->output_offset
,
7127 /* Generate a reloc when linking an ELF file. This is a reloc
7128 requested by the linker, and does come from any input file. This
7129 is used to build constructor and destructor tables when linking
7133 elf_reloc_link_order (output_bfd
, info
, output_section
, link_order
)
7135 struct bfd_link_info
*info
;
7136 asection
*output_section
;
7137 struct bfd_link_order
*link_order
;
7139 reloc_howto_type
*howto
;
7143 struct elf_link_hash_entry
**rel_hash_ptr
;
7144 Elf_Internal_Shdr
*rel_hdr
;
7145 struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
7146 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
7150 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
7153 bfd_set_error (bfd_error_bad_value
);
7157 addend
= link_order
->u
.reloc
.p
->addend
;
7159 /* Figure out the symbol index. */
7160 rel_hash_ptr
= (elf_section_data (output_section
)->rel_hashes
7161 + elf_section_data (output_section
)->rel_count
7162 + elf_section_data (output_section
)->rel_count2
);
7163 if (link_order
->type
== bfd_section_reloc_link_order
)
7165 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
7166 BFD_ASSERT (indx
!= 0);
7167 *rel_hash_ptr
= NULL
;
7171 struct elf_link_hash_entry
*h
;
7173 /* Treat a reloc against a defined symbol as though it were
7174 actually against the section. */
7175 h
= ((struct elf_link_hash_entry
*)
7176 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
7177 link_order
->u
.reloc
.p
->u
.name
,
7178 FALSE
, FALSE
, TRUE
));
7180 && (h
->root
.type
== bfd_link_hash_defined
7181 || h
->root
.type
== bfd_link_hash_defweak
))
7185 section
= h
->root
.u
.def
.section
;
7186 indx
= section
->output_section
->target_index
;
7187 *rel_hash_ptr
= NULL
;
7188 /* It seems that we ought to add the symbol value to the
7189 addend here, but in practice it has already been added
7190 because it was passed to constructor_callback. */
7191 addend
+= section
->output_section
->vma
+ section
->output_offset
;
7195 /* Setting the index to -2 tells elf_link_output_extsym that
7196 this symbol is used by a reloc. */
7203 if (! ((*info
->callbacks
->unattached_reloc
)
7204 (info
, link_order
->u
.reloc
.p
->u
.name
, (bfd
*) NULL
,
7205 (asection
*) NULL
, (bfd_vma
) 0)))
7211 /* If this is an inplace reloc, we must write the addend into the
7213 if (howto
->partial_inplace
&& addend
!= 0)
7216 bfd_reloc_status_type rstat
;
7219 const char *sym_name
;
7221 size
= bfd_get_reloc_size (howto
);
7222 buf
= (bfd_byte
*) bfd_zmalloc (size
);
7223 if (buf
== (bfd_byte
*) NULL
)
7225 rstat
= _bfd_relocate_contents (howto
, output_bfd
, (bfd_vma
) addend
, buf
);
7232 case bfd_reloc_outofrange
:
7235 case bfd_reloc_overflow
:
7236 if (link_order
->type
== bfd_section_reloc_link_order
)
7237 sym_name
= bfd_section_name (output_bfd
,
7238 link_order
->u
.reloc
.p
->u
.section
);
7240 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
7241 if (! ((*info
->callbacks
->reloc_overflow
)
7242 (info
, sym_name
, howto
->name
, addend
,
7243 (bfd
*) NULL
, (asection
*) NULL
, (bfd_vma
) 0)))
7250 ok
= bfd_set_section_contents (output_bfd
, output_section
, (PTR
) buf
,
7251 (file_ptr
) link_order
->offset
, size
);
7257 /* The address of a reloc is relative to the section in a
7258 relocateable file, and is a virtual address in an executable
7260 offset
= link_order
->offset
;
7261 if (! info
->relocateable
)
7262 offset
+= output_section
->vma
;
7264 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
7266 irel
[i
].r_offset
= offset
;
7268 irel
[i
].r_addend
= 0;
7270 irel
[0].r_info
= ELF_R_INFO (indx
, howto
->type
);
7272 rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
7273 erel
= rel_hdr
->contents
;
7274 if (rel_hdr
->sh_type
== SHT_REL
)
7276 erel
+= (elf_section_data (output_section
)->rel_count
7277 * sizeof (Elf_External_Rel
));
7278 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
7282 irel
[0].r_addend
= addend
;
7283 erel
+= (elf_section_data (output_section
)->rel_count
7284 * sizeof (Elf_External_Rela
));
7285 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
7288 ++elf_section_data (output_section
)->rel_count
;
7293 /* Allocate a pointer to live in a linker created section. */
7296 elf_create_pointer_linker_section (abfd
, info
, lsect
, h
, rel
)
7298 struct bfd_link_info
*info
;
7299 elf_linker_section_t
*lsect
;
7300 struct elf_link_hash_entry
*h
;
7301 const Elf_Internal_Rela
*rel
;
7303 elf_linker_section_pointers_t
**ptr_linker_section_ptr
= NULL
;
7304 elf_linker_section_pointers_t
*linker_section_ptr
;
7305 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
7308 BFD_ASSERT (lsect
!= NULL
);
7310 /* Is this a global symbol? */
7313 /* Has this symbol already been allocated? If so, our work is done. */
7314 if (_bfd_elf_find_pointer_linker_section (h
->linker_section_pointer
,
7319 ptr_linker_section_ptr
= &h
->linker_section_pointer
;
7320 /* Make sure this symbol is output as a dynamic symbol. */
7321 if (h
->dynindx
== -1)
7323 if (! elf_link_record_dynamic_symbol (info
, h
))
7327 if (lsect
->rel_section
)
7328 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
7332 /* Allocation of a pointer to a local symbol. */
7333 elf_linker_section_pointers_t
**ptr
= elf_local_ptr_offsets (abfd
);
7335 /* Allocate a table to hold the local symbols if first time. */
7338 unsigned int num_symbols
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
7339 register unsigned int i
;
7342 amt
*= sizeof (elf_linker_section_pointers_t
*);
7343 ptr
= (elf_linker_section_pointers_t
**) bfd_alloc (abfd
, amt
);
7348 elf_local_ptr_offsets (abfd
) = ptr
;
7349 for (i
= 0; i
< num_symbols
; i
++)
7350 ptr
[i
] = (elf_linker_section_pointers_t
*) 0;
7353 /* Has this symbol already been allocated? If so, our work is done. */
7354 if (_bfd_elf_find_pointer_linker_section (ptr
[r_symndx
],
7359 ptr_linker_section_ptr
= &ptr
[r_symndx
];
7363 /* If we are generating a shared object, we need to
7364 output a R_<xxx>_RELATIVE reloc so that the
7365 dynamic linker can adjust this GOT entry. */
7366 BFD_ASSERT (lsect
->rel_section
!= NULL
);
7367 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
7371 /* Allocate space for a pointer in the linker section, and allocate
7372 a new pointer record from internal memory. */
7373 BFD_ASSERT (ptr_linker_section_ptr
!= NULL
);
7374 amt
= sizeof (elf_linker_section_pointers_t
);
7375 linker_section_ptr
= (elf_linker_section_pointers_t
*) bfd_alloc (abfd
, amt
);
7377 if (!linker_section_ptr
)
7380 linker_section_ptr
->next
= *ptr_linker_section_ptr
;
7381 linker_section_ptr
->addend
= rel
->r_addend
;
7382 linker_section_ptr
->which
= lsect
->which
;
7383 linker_section_ptr
->written_address_p
= FALSE
;
7384 *ptr_linker_section_ptr
= linker_section_ptr
;
7387 if (lsect
->hole_size
&& lsect
->hole_offset
< lsect
->max_hole_offset
)
7389 linker_section_ptr
->offset
= (lsect
->section
->_raw_size
7390 - lsect
->hole_size
+ (ARCH_SIZE
/ 8));
7391 lsect
->hole_offset
+= ARCH_SIZE
/ 8;
7392 lsect
->sym_offset
+= ARCH_SIZE
/ 8;
7393 if (lsect
->sym_hash
)
7395 /* Bump up symbol value if needed. */
7396 lsect
->sym_hash
->root
.u
.def
.value
+= ARCH_SIZE
/ 8;
7398 fprintf (stderr
, "Bump up %s by %ld, current value = %ld\n",
7399 lsect
->sym_hash
->root
.root
.string
,
7400 (long) ARCH_SIZE
/ 8,
7401 (long) lsect
->sym_hash
->root
.u
.def
.value
);
7407 linker_section_ptr
->offset
= lsect
->section
->_raw_size
;
7409 lsect
->section
->_raw_size
+= ARCH_SIZE
/ 8;
7413 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
7414 lsect
->name
, (long) linker_section_ptr
->offset
,
7415 (long) lsect
->section
->_raw_size
);
7422 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR)
7425 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR)
7428 /* Fill in the address for a pointer generated in a linker section. */
7431 elf_finish_pointer_linker_section (output_bfd
, input_bfd
, info
, lsect
, h
,
7432 relocation
, rel
, relative_reloc
)
7435 struct bfd_link_info
*info
;
7436 elf_linker_section_t
*lsect
;
7437 struct elf_link_hash_entry
*h
;
7439 const Elf_Internal_Rela
*rel
;
7442 elf_linker_section_pointers_t
*linker_section_ptr
;
7444 BFD_ASSERT (lsect
!= NULL
);
7448 /* Handle global symbol. */
7449 linker_section_ptr
= (_bfd_elf_find_pointer_linker_section
7450 (h
->linker_section_pointer
,
7454 BFD_ASSERT (linker_section_ptr
!= NULL
);
7456 if (! elf_hash_table (info
)->dynamic_sections_created
7459 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
7461 /* This is actually a static link, or it is a
7462 -Bsymbolic link and the symbol is defined
7463 locally. We must initialize this entry in the
7466 When doing a dynamic link, we create a .rela.<xxx>
7467 relocation entry to initialize the value. This
7468 is done in the finish_dynamic_symbol routine. */
7469 if (!linker_section_ptr
->written_address_p
)
7471 linker_section_ptr
->written_address_p
= TRUE
;
7472 bfd_put_ptr (output_bfd
,
7473 relocation
+ linker_section_ptr
->addend
,
7474 (lsect
->section
->contents
7475 + linker_section_ptr
->offset
));
7481 /* Handle local symbol. */
7482 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
7483 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
) != NULL
);
7484 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
)[r_symndx
] != NULL
);
7485 linker_section_ptr
= (_bfd_elf_find_pointer_linker_section
7486 (elf_local_ptr_offsets (input_bfd
)[r_symndx
],
7490 BFD_ASSERT (linker_section_ptr
!= NULL
);
7492 /* Write out pointer if it hasn't been rewritten out before. */
7493 if (!linker_section_ptr
->written_address_p
)
7495 linker_section_ptr
->written_address_p
= TRUE
;
7496 bfd_put_ptr (output_bfd
, relocation
+ linker_section_ptr
->addend
,
7497 lsect
->section
->contents
+ linker_section_ptr
->offset
);
7501 asection
*srel
= lsect
->rel_section
;
7502 Elf_Internal_Rela outrel
[MAX_INT_RELS_PER_EXT_REL
];
7504 struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
7507 /* We need to generate a relative reloc for the dynamic
7511 srel
= bfd_get_section_by_name (elf_hash_table (info
)->dynobj
,
7513 lsect
->rel_section
= srel
;
7516 BFD_ASSERT (srel
!= NULL
);
7518 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
7520 outrel
[i
].r_offset
= (lsect
->section
->output_section
->vma
7521 + lsect
->section
->output_offset
7522 + linker_section_ptr
->offset
);
7523 outrel
[i
].r_info
= 0;
7524 outrel
[i
].r_addend
= 0;
7526 outrel
[0].r_info
= ELF_R_INFO (0, relative_reloc
);
7527 erel
= lsect
->section
->contents
;
7528 erel
+= (elf_section_data (lsect
->section
)->rel_count
++
7529 * sizeof (Elf_External_Rela
));
7530 elf_swap_reloca_out (output_bfd
, outrel
, erel
);
7535 relocation
= (lsect
->section
->output_offset
7536 + linker_section_ptr
->offset
7537 - lsect
->hole_offset
7538 - lsect
->sym_offset
);
7542 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7543 lsect
->name
, (long) relocation
, (long) relocation
);
7546 /* Subtract out the addend, because it will get added back in by the normal
7548 return relocation
- linker_section_ptr
->addend
;
7551 /* Garbage collect unused sections. */
7553 static bfd_boolean elf_gc_mark
7554 PARAMS ((struct bfd_link_info
*, asection
*,
7555 asection
* (*) (asection
*, struct bfd_link_info
*,
7556 Elf_Internal_Rela
*, struct elf_link_hash_entry
*,
7557 Elf_Internal_Sym
*)));
7559 static bfd_boolean elf_gc_sweep
7560 PARAMS ((struct bfd_link_info
*,
7561 bfd_boolean (*) (bfd
*, struct bfd_link_info
*, asection
*,
7562 const Elf_Internal_Rela
*)));
7564 static bfd_boolean elf_gc_sweep_symbol
7565 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7567 static bfd_boolean elf_gc_allocate_got_offsets
7568 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7570 static bfd_boolean elf_gc_propagate_vtable_entries_used
7571 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7573 static bfd_boolean elf_gc_smash_unused_vtentry_relocs
7574 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7576 /* The mark phase of garbage collection. For a given section, mark
7577 it and any sections in this section's group, and all the sections
7578 which define symbols to which it refers. */
7580 typedef asection
* (*gc_mark_hook_fn
)
7581 PARAMS ((asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
7582 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
7585 elf_gc_mark (info
, sec
, gc_mark_hook
)
7586 struct bfd_link_info
*info
;
7588 gc_mark_hook_fn gc_mark_hook
;
7591 asection
*group_sec
;
7595 /* Mark all the sections in the group. */
7596 group_sec
= elf_section_data (sec
)->next_in_group
;
7597 if (group_sec
&& !group_sec
->gc_mark
)
7598 if (!elf_gc_mark (info
, group_sec
, gc_mark_hook
))
7601 /* Look through the section relocs. */
7603 if ((sec
->flags
& SEC_RELOC
) != 0 && sec
->reloc_count
> 0)
7605 Elf_Internal_Rela
*relstart
, *rel
, *relend
;
7606 Elf_Internal_Shdr
*symtab_hdr
;
7607 struct elf_link_hash_entry
**sym_hashes
;
7610 bfd
*input_bfd
= sec
->owner
;
7611 struct elf_backend_data
*bed
= get_elf_backend_data (input_bfd
);
7612 Elf_Internal_Sym
*isym
= NULL
;
7614 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
7615 sym_hashes
= elf_sym_hashes (input_bfd
);
7617 /* Read the local symbols. */
7618 if (elf_bad_symtab (input_bfd
))
7620 nlocsyms
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
7624 extsymoff
= nlocsyms
= symtab_hdr
->sh_info
;
7626 isym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
7627 if (isym
== NULL
&& nlocsyms
!= 0)
7629 isym
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, nlocsyms
, 0,
7635 /* Read the relocations. */
7636 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
7637 (input_bfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
7638 info
->keep_memory
));
7639 if (relstart
== NULL
)
7644 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
7646 for (rel
= relstart
; rel
< relend
; rel
++)
7648 unsigned long r_symndx
;
7650 struct elf_link_hash_entry
*h
;
7652 r_symndx
= ELF_R_SYM (rel
->r_info
);
7656 if (r_symndx
>= nlocsyms
7657 || ELF_ST_BIND (isym
[r_symndx
].st_info
) != STB_LOCAL
)
7659 h
= sym_hashes
[r_symndx
- extsymoff
];
7660 rsec
= (*gc_mark_hook
) (sec
, info
, rel
, h
, NULL
);
7664 rsec
= (*gc_mark_hook
) (sec
, info
, rel
, NULL
, &isym
[r_symndx
]);
7667 if (rsec
&& !rsec
->gc_mark
)
7669 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
)
7671 else if (!elf_gc_mark (info
, rsec
, gc_mark_hook
))
7680 if (elf_section_data (sec
)->relocs
!= relstart
)
7683 if (isym
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isym
)
7685 if (! info
->keep_memory
)
7688 symtab_hdr
->contents
= (unsigned char *) isym
;
7695 /* The sweep phase of garbage collection. Remove all garbage sections. */
7697 typedef bfd_boolean (*gc_sweep_hook_fn
)
7698 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
7699 const Elf_Internal_Rela
*));
7702 elf_gc_sweep (info
, gc_sweep_hook
)
7703 struct bfd_link_info
*info
;
7704 gc_sweep_hook_fn gc_sweep_hook
;
7708 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
7712 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
7715 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
7717 /* Keep special sections. Keep .debug sections. */
7718 if ((o
->flags
& SEC_LINKER_CREATED
)
7719 || (o
->flags
& SEC_DEBUGGING
))
7725 /* Skip sweeping sections already excluded. */
7726 if (o
->flags
& SEC_EXCLUDE
)
7729 /* Since this is early in the link process, it is simple
7730 to remove a section from the output. */
7731 o
->flags
|= SEC_EXCLUDE
;
7733 /* But we also have to update some of the relocation
7734 info we collected before. */
7736 && (o
->flags
& SEC_RELOC
) && o
->reloc_count
> 0)
7738 Elf_Internal_Rela
*internal_relocs
;
7741 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
7742 (o
->owner
, o
, NULL
, NULL
, info
->keep_memory
));
7743 if (internal_relocs
== NULL
)
7746 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
7748 if (elf_section_data (o
)->relocs
!= internal_relocs
)
7749 free (internal_relocs
);
7757 /* Remove the symbols that were in the swept sections from the dynamic
7758 symbol table. GCFIXME: Anyone know how to get them out of the
7759 static symbol table as well? */
7763 elf_link_hash_traverse (elf_hash_table (info
),
7764 elf_gc_sweep_symbol
,
7767 elf_hash_table (info
)->dynsymcount
= i
;
7773 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
7776 elf_gc_sweep_symbol (h
, idxptr
)
7777 struct elf_link_hash_entry
*h
;
7780 int *idx
= (int *) idxptr
;
7782 if (h
->root
.type
== bfd_link_hash_warning
)
7783 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7785 if (h
->dynindx
!= -1
7786 && ((h
->root
.type
!= bfd_link_hash_defined
7787 && h
->root
.type
!= bfd_link_hash_defweak
)
7788 || h
->root
.u
.def
.section
->gc_mark
))
7789 h
->dynindx
= (*idx
)++;
7794 /* Propogate collected vtable information. This is called through
7795 elf_link_hash_traverse. */
7798 elf_gc_propagate_vtable_entries_used (h
, okp
)
7799 struct elf_link_hash_entry
*h
;
7802 if (h
->root
.type
== bfd_link_hash_warning
)
7803 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7805 /* Those that are not vtables. */
7806 if (h
->vtable_parent
== NULL
)
7809 /* Those vtables that do not have parents, we cannot merge. */
7810 if (h
->vtable_parent
== (struct elf_link_hash_entry
*) -1)
7813 /* If we've already been done, exit. */
7814 if (h
->vtable_entries_used
&& h
->vtable_entries_used
[-1])
7817 /* Make sure the parent's table is up to date. */
7818 elf_gc_propagate_vtable_entries_used (h
->vtable_parent
, okp
);
7820 if (h
->vtable_entries_used
== NULL
)
7822 /* None of this table's entries were referenced. Re-use the
7824 h
->vtable_entries_used
= h
->vtable_parent
->vtable_entries_used
;
7825 h
->vtable_entries_size
= h
->vtable_parent
->vtable_entries_size
;
7830 bfd_boolean
*cu
, *pu
;
7832 /* Or the parent's entries into ours. */
7833 cu
= h
->vtable_entries_used
;
7835 pu
= h
->vtable_parent
->vtable_entries_used
;
7838 asection
*sec
= h
->root
.u
.def
.section
;
7839 struct elf_backend_data
*bed
= get_elf_backend_data (sec
->owner
);
7840 int file_align
= bed
->s
->file_align
;
7842 n
= h
->vtable_parent
->vtable_entries_size
/ file_align
;
7857 elf_gc_smash_unused_vtentry_relocs (h
, okp
)
7858 struct elf_link_hash_entry
*h
;
7862 bfd_vma hstart
, hend
;
7863 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
7864 struct elf_backend_data
*bed
;
7867 if (h
->root
.type
== bfd_link_hash_warning
)
7868 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7870 /* Take care of both those symbols that do not describe vtables as
7871 well as those that are not loaded. */
7872 if (h
->vtable_parent
== NULL
)
7875 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
7876 || h
->root
.type
== bfd_link_hash_defweak
);
7878 sec
= h
->root
.u
.def
.section
;
7879 hstart
= h
->root
.u
.def
.value
;
7880 hend
= hstart
+ h
->size
;
7882 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
7883 (sec
->owner
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
, TRUE
));
7885 return *(bfd_boolean
*) okp
= FALSE
;
7886 bed
= get_elf_backend_data (sec
->owner
);
7887 file_align
= bed
->s
->file_align
;
7889 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
7891 for (rel
= relstart
; rel
< relend
; ++rel
)
7892 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
7894 /* If the entry is in use, do nothing. */
7895 if (h
->vtable_entries_used
7896 && (rel
->r_offset
- hstart
) < h
->vtable_entries_size
)
7898 bfd_vma entry
= (rel
->r_offset
- hstart
) / file_align
;
7899 if (h
->vtable_entries_used
[entry
])
7902 /* Otherwise, kill it. */
7903 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
7909 /* Do mark and sweep of unused sections. */
7912 elf_gc_sections (abfd
, info
)
7914 struct bfd_link_info
*info
;
7916 bfd_boolean ok
= TRUE
;
7918 asection
* (*gc_mark_hook
)
7919 PARAMS ((asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
7920 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*));
7922 if (!get_elf_backend_data (abfd
)->can_gc_sections
7923 || info
->relocateable
|| info
->emitrelocations
7924 || elf_hash_table (info
)->dynamic_sections_created
)
7927 /* Apply transitive closure to the vtable entry usage info. */
7928 elf_link_hash_traverse (elf_hash_table (info
),
7929 elf_gc_propagate_vtable_entries_used
,
7934 /* Kill the vtable relocations that were not used. */
7935 elf_link_hash_traverse (elf_hash_table (info
),
7936 elf_gc_smash_unused_vtentry_relocs
,
7941 /* Grovel through relocs to find out who stays ... */
7943 gc_mark_hook
= get_elf_backend_data (abfd
)->gc_mark_hook
;
7944 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
7948 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
7951 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
7953 if (o
->flags
& SEC_KEEP
)
7954 if (!elf_gc_mark (info
, o
, gc_mark_hook
))
7959 /* ... and mark SEC_EXCLUDE for those that go. */
7960 if (!elf_gc_sweep (info
, get_elf_backend_data (abfd
)->gc_sweep_hook
))
7966 /* Called from check_relocs to record the existance of a VTINHERIT reloc. */
7969 elf_gc_record_vtinherit (abfd
, sec
, h
, offset
)
7972 struct elf_link_hash_entry
*h
;
7975 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
7976 struct elf_link_hash_entry
**search
, *child
;
7977 bfd_size_type extsymcount
;
7979 /* The sh_info field of the symtab header tells us where the
7980 external symbols start. We don't care about the local symbols at
7982 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/sizeof (Elf_External_Sym
);
7983 if (!elf_bad_symtab (abfd
))
7984 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
7986 sym_hashes
= elf_sym_hashes (abfd
);
7987 sym_hashes_end
= sym_hashes
+ extsymcount
;
7989 /* Hunt down the child symbol, which is in this section at the same
7990 offset as the relocation. */
7991 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
7993 if ((child
= *search
) != NULL
7994 && (child
->root
.type
== bfd_link_hash_defined
7995 || child
->root
.type
== bfd_link_hash_defweak
)
7996 && child
->root
.u
.def
.section
== sec
7997 && child
->root
.u
.def
.value
== offset
)
8001 (*_bfd_error_handler
) ("%s: %s+%lu: No symbol found for INHERIT",
8002 bfd_archive_filename (abfd
), sec
->name
,
8003 (unsigned long) offset
);
8004 bfd_set_error (bfd_error_invalid_operation
);
8010 /* This *should* only be the absolute section. It could potentially
8011 be that someone has defined a non-global vtable though, which
8012 would be bad. It isn't worth paging in the local symbols to be
8013 sure though; that case should simply be handled by the assembler. */
8015 child
->vtable_parent
= (struct elf_link_hash_entry
*) -1;
8018 child
->vtable_parent
= h
;
8023 /* Called from check_relocs to record the existance of a VTENTRY reloc. */
8026 elf_gc_record_vtentry (abfd
, sec
, h
, addend
)
8027 bfd
*abfd ATTRIBUTE_UNUSED
;
8028 asection
*sec ATTRIBUTE_UNUSED
;
8029 struct elf_link_hash_entry
*h
;
8032 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8033 int file_align
= bed
->s
->file_align
;
8035 if (addend
>= h
->vtable_entries_size
)
8038 bfd_boolean
*ptr
= h
->vtable_entries_used
;
8040 /* While the symbol is undefined, we have to be prepared to handle
8042 if (h
->root
.type
== bfd_link_hash_undefined
)
8049 /* Oops! We've got a reference past the defined end of
8050 the table. This is probably a bug -- shall we warn? */
8055 /* Allocate one extra entry for use as a "done" flag for the
8056 consolidation pass. */
8057 bytes
= (size
/ file_align
+ 1) * sizeof (bfd_boolean
);
8061 ptr
= bfd_realloc (ptr
- 1, (bfd_size_type
) bytes
);
8067 oldbytes
= ((h
->vtable_entries_size
/ file_align
+ 1)
8068 * sizeof (bfd_boolean
));
8069 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
8073 ptr
= bfd_zmalloc ((bfd_size_type
) bytes
);
8078 /* And arrange for that done flag to be at index -1. */
8079 h
->vtable_entries_used
= ptr
+ 1;
8080 h
->vtable_entries_size
= size
;
8083 h
->vtable_entries_used
[addend
/ file_align
] = TRUE
;
8088 /* And an accompanying bit to work out final got entry offsets once
8089 we're done. Should be called from final_link. */
8092 elf_gc_common_finalize_got_offsets (abfd
, info
)
8094 struct bfd_link_info
*info
;
8097 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8100 /* The GOT offset is relative to the .got section, but the GOT header is
8101 put into the .got.plt section, if the backend uses it. */
8102 if (bed
->want_got_plt
)
8105 gotoff
= bed
->got_header_size
;
8107 /* Do the local .got entries first. */
8108 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
8110 bfd_signed_vma
*local_got
;
8111 bfd_size_type j
, locsymcount
;
8112 Elf_Internal_Shdr
*symtab_hdr
;
8114 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
8117 local_got
= elf_local_got_refcounts (i
);
8121 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
8122 if (elf_bad_symtab (i
))
8123 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
8125 locsymcount
= symtab_hdr
->sh_info
;
8127 for (j
= 0; j
< locsymcount
; ++j
)
8129 if (local_got
[j
] > 0)
8131 local_got
[j
] = gotoff
;
8132 gotoff
+= ARCH_SIZE
/ 8;
8135 local_got
[j
] = (bfd_vma
) -1;
8139 /* Then the global .got entries. .plt refcounts are handled by
8140 adjust_dynamic_symbol */
8141 elf_link_hash_traverse (elf_hash_table (info
),
8142 elf_gc_allocate_got_offsets
,
8147 /* We need a special top-level link routine to convert got reference counts
8148 to real got offsets. */
8151 elf_gc_allocate_got_offsets (h
, offarg
)
8152 struct elf_link_hash_entry
*h
;
8155 bfd_vma
*off
= (bfd_vma
*) offarg
;
8157 if (h
->root
.type
== bfd_link_hash_warning
)
8158 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8160 if (h
->got
.refcount
> 0)
8162 h
->got
.offset
= off
[0];
8163 off
[0] += ARCH_SIZE
/ 8;
8166 h
->got
.offset
= (bfd_vma
) -1;
8171 /* Many folk need no more in the way of final link than this, once
8172 got entry reference counting is enabled. */
8175 elf_gc_common_final_link (abfd
, info
)
8177 struct bfd_link_info
*info
;
8179 if (!elf_gc_common_finalize_got_offsets (abfd
, info
))
8182 /* Invoke the regular ELF backend linker to do all the work. */
8183 return elf_bfd_final_link (abfd
, info
);
8186 /* This function will be called though elf_link_hash_traverse to store
8187 all hash value of the exported symbols in an array. */
8190 elf_collect_hash_codes (h
, data
)
8191 struct elf_link_hash_entry
*h
;
8194 unsigned long **valuep
= (unsigned long **) data
;
8200 if (h
->root
.type
== bfd_link_hash_warning
)
8201 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8203 /* Ignore indirect symbols. These are added by the versioning code. */
8204 if (h
->dynindx
== -1)
8207 name
= h
->root
.root
.string
;
8208 p
= strchr (name
, ELF_VER_CHR
);
8211 alc
= bfd_malloc ((bfd_size_type
) (p
- name
+ 1));
8212 memcpy (alc
, name
, (size_t) (p
- name
));
8213 alc
[p
- name
] = '\0';
8217 /* Compute the hash value. */
8218 ha
= bfd_elf_hash (name
);
8220 /* Store the found hash value in the array given as the argument. */
8223 /* And store it in the struct so that we can put it in the hash table
8225 h
->elf_hash_value
= ha
;
8234 elf_reloc_symbol_deleted_p (offset
, cookie
)
8238 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
8240 if (rcookie
->bad_symtab
)
8241 rcookie
->rel
= rcookie
->rels
;
8243 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
8245 unsigned long r_symndx
;
8247 if (! rcookie
->bad_symtab
)
8248 if (rcookie
->rel
->r_offset
> offset
)
8250 if (rcookie
->rel
->r_offset
!= offset
)
8253 r_symndx
= ELF_R_SYM (rcookie
->rel
->r_info
);
8254 if (r_symndx
== SHN_UNDEF
)
8257 if (r_symndx
>= rcookie
->locsymcount
8258 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
8260 struct elf_link_hash_entry
*h
;
8262 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
8264 while (h
->root
.type
== bfd_link_hash_indirect
8265 || h
->root
.type
== bfd_link_hash_warning
)
8266 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8268 if ((h
->root
.type
== bfd_link_hash_defined
8269 || h
->root
.type
== bfd_link_hash_defweak
)
8270 && elf_discarded_section (h
->root
.u
.def
.section
))
8277 /* It's not a relocation against a global symbol,
8278 but it could be a relocation against a local
8279 symbol for a discarded section. */
8281 Elf_Internal_Sym
*isym
;
8283 /* Need to: get the symbol; get the section. */
8284 isym
= &rcookie
->locsyms
[r_symndx
];
8285 if (isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
8287 isec
= section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
8288 if (isec
!= NULL
&& elf_discarded_section (isec
))
8297 /* Discard unneeded references to discarded sections.
8298 Returns TRUE if any section's size was changed. */
8299 /* This function assumes that the relocations are in sorted order,
8300 which is true for all known assemblers. */
8303 elf_bfd_discard_info (output_bfd
, info
)
8305 struct bfd_link_info
*info
;
8307 struct elf_reloc_cookie cookie
;
8308 asection
*stab
, *eh
;
8309 Elf_Internal_Shdr
*symtab_hdr
;
8310 struct elf_backend_data
*bed
;
8313 bfd_boolean ret
= FALSE
;
8315 if (info
->traditional_format
8316 || info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
8317 || ! is_elf_hash_table (info
))
8320 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link_next
)
8322 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
8325 bed
= get_elf_backend_data (abfd
);
8327 if ((abfd
->flags
& DYNAMIC
) != 0)
8330 eh
= bfd_get_section_by_name (abfd
, ".eh_frame");
8332 && (eh
->_raw_size
== 0
8333 || bfd_is_abs_section (eh
->output_section
)))
8336 stab
= bfd_get_section_by_name (abfd
, ".stab");
8338 && (stab
->_raw_size
== 0
8339 || bfd_is_abs_section (stab
->output_section
)
8340 || stab
->sec_info_type
!= ELF_INFO_TYPE_STABS
))
8345 && bed
->elf_backend_discard_info
== NULL
)
8348 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
8350 cookie
.sym_hashes
= elf_sym_hashes (abfd
);
8351 cookie
.bad_symtab
= elf_bad_symtab (abfd
);
8352 if (cookie
.bad_symtab
)
8354 cookie
.locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
8355 cookie
.extsymoff
= 0;
8359 cookie
.locsymcount
= symtab_hdr
->sh_info
;
8360 cookie
.extsymoff
= symtab_hdr
->sh_info
;
8363 cookie
.locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
8364 if (cookie
.locsyms
== NULL
&& cookie
.locsymcount
!= 0)
8366 cookie
.locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
8367 cookie
.locsymcount
, 0,
8369 if (cookie
.locsyms
== NULL
)
8376 count
= stab
->reloc_count
;
8378 cookie
.rels
= (NAME(_bfd_elf
,link_read_relocs
)
8379 (abfd
, stab
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
8380 info
->keep_memory
));
8381 if (cookie
.rels
!= NULL
)
8383 cookie
.rel
= cookie
.rels
;
8384 cookie
.relend
= cookie
.rels
;
8385 cookie
.relend
+= count
* bed
->s
->int_rels_per_ext_rel
;
8386 if (_bfd_discard_section_stabs (abfd
, stab
,
8387 elf_section_data (stab
)->sec_info
,
8388 elf_reloc_symbol_deleted_p
,
8391 if (elf_section_data (stab
)->relocs
!= cookie
.rels
)
8399 count
= eh
->reloc_count
;
8401 cookie
.rels
= (NAME(_bfd_elf
,link_read_relocs
)
8402 (abfd
, eh
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
8403 info
->keep_memory
));
8404 cookie
.rel
= cookie
.rels
;
8405 cookie
.relend
= cookie
.rels
;
8406 if (cookie
.rels
!= NULL
)
8407 cookie
.relend
+= count
* bed
->s
->int_rels_per_ext_rel
;
8409 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, eh
,
8410 elf_reloc_symbol_deleted_p
,
8414 if (cookie
.rels
!= NULL
8415 && elf_section_data (eh
)->relocs
!= cookie
.rels
)
8419 if (bed
->elf_backend_discard_info
!= NULL
8420 && (*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
8423 if (cookie
.locsyms
!= NULL
8424 && symtab_hdr
->contents
!= (unsigned char *) cookie
.locsyms
)
8426 if (! info
->keep_memory
)
8427 free (cookie
.locsyms
);
8429 symtab_hdr
->contents
= (unsigned char *) cookie
.locsyms
;
8433 if (info
->eh_frame_hdr
8434 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
8441 elf_section_ignore_discarded_relocs (sec
)
8444 struct elf_backend_data
*bed
;
8446 switch (sec
->sec_info_type
)
8448 case ELF_INFO_TYPE_STABS
:
8449 case ELF_INFO_TYPE_EH_FRAME
:
8455 bed
= get_elf_backend_data (sec
->owner
);
8456 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
8457 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))