2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
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 boolean is_global_data_symbol_definition
34 PARAMS ((bfd
*, Elf_Internal_Sym
*));
35 static boolean elf_link_is_defined_archive_symbol
36 PARAMS ((bfd
*, carsym
*));
37 static boolean elf_link_add_object_symbols
38 PARAMS ((bfd
*, struct bfd_link_info
*));
39 static boolean elf_link_add_archive_symbols
40 PARAMS ((bfd
*, struct bfd_link_info
*));
41 static 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
**, boolean
*, boolean
*,
46 static 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 boolean
*, boolean
, boolean
));
50 static boolean elf_export_symbol
51 PARAMS ((struct elf_link_hash_entry
*, PTR
));
52 static boolean elf_finalize_dynstr
53 PARAMS ((bfd
*, struct bfd_link_info
*));
54 static boolean elf_fix_symbol_flags
55 PARAMS ((struct elf_link_hash_entry
*, struct elf_info_failed
*));
56 static boolean elf_adjust_dynamic_symbol
57 PARAMS ((struct elf_link_hash_entry
*, PTR
));
58 static boolean elf_link_find_version_dependencies
59 PARAMS ((struct elf_link_hash_entry
*, PTR
));
60 static boolean elf_link_assign_sym_version
61 PARAMS ((struct elf_link_hash_entry
*, PTR
));
62 static boolean elf_collect_hash_codes
63 PARAMS ((struct elf_link_hash_entry
*, PTR
));
64 static 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 boolean elf_link_output_relocs
69 PARAMS ((bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*));
70 static 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 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 boolean
*defined
= NULL
;
259 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 (boolean
);
281 defined
= (boolean
*) bfd_zmalloc (amt
);
282 included
= (boolean
*) bfd_zmalloc (amt
);
283 if (defined
== (boolean
*) NULL
|| included
== (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
!= (boolean
*) NULL
)
448 if (included
!= (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
;
476 boolean
*type_change_ok
;
477 boolean
*size_change_ok
;
481 struct elf_link_hash_entry
*h
;
484 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
;
920 boolean type_change_ok
;
921 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 boolean (*add_symbol_hook
) PARAMS ((bfd
*, struct bfd_link_info
*,
1156 const Elf_Internal_Sym
*,
1157 const char **, flagword
*,
1158 asection
**, bfd_vma
*));
1159 boolean (*check_relocs
) PARAMS ((bfd
*, struct bfd_link_info
*,
1160 asection
*, const Elf_Internal_Rela
*));
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
;
1168 Elf_External_Versym
*extversym
= NULL
;
1169 Elf_External_Versym
*ever
;
1170 struct elf_link_hash_entry
*weaks
;
1171 Elf_Internal_Sym
*isymbuf
= NULL
;
1172 Elf_Internal_Sym
*isym
;
1173 Elf_Internal_Sym
*isymend
;
1174 struct elf_backend_data
*bed
;
1176 struct elf_link_hash_table
* hash_table
;
1179 hash_table
= elf_hash_table (info
);
1181 bed
= get_elf_backend_data (abfd
);
1182 add_symbol_hook
= bed
->elf_add_symbol_hook
;
1183 collect
= bed
->collect
;
1185 if ((abfd
->flags
& DYNAMIC
) == 0)
1191 /* You can't use -r against a dynamic object. Also, there's no
1192 hope of using a dynamic object which does not exactly match
1193 the format of the output file. */
1194 if (info
->relocateable
|| info
->hash
->creator
!= abfd
->xvec
)
1196 bfd_set_error (bfd_error_invalid_operation
);
1201 /* As a GNU extension, any input sections which are named
1202 .gnu.warning.SYMBOL are treated as warning symbols for the given
1203 symbol. This differs from .gnu.warning sections, which generate
1204 warnings when they are included in an output file. */
1209 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
1213 name
= bfd_get_section_name (abfd
, s
);
1214 if (strncmp (name
, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0)
1219 name
+= sizeof ".gnu.warning." - 1;
1221 /* If this is a shared object, then look up the symbol
1222 in the hash table. If it is there, and it is already
1223 been defined, then we will not be using the entry
1224 from this shared object, so we don't need to warn.
1225 FIXME: If we see the definition in a regular object
1226 later on, we will warn, but we shouldn't. The only
1227 fix is to keep track of what warnings we are supposed
1228 to emit, and then handle them all at the end of the
1230 if (dynamic
&& abfd
->xvec
== info
->hash
->creator
)
1232 struct elf_link_hash_entry
*h
;
1234 h
= elf_link_hash_lookup (hash_table
, name
,
1235 false, false, true);
1237 /* FIXME: What about bfd_link_hash_common? */
1239 && (h
->root
.type
== bfd_link_hash_defined
1240 || h
->root
.type
== bfd_link_hash_defweak
))
1242 /* We don't want to issue this warning. Clobber
1243 the section size so that the warning does not
1244 get copied into the output file. */
1250 sz
= bfd_section_size (abfd
, s
);
1251 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
1255 if (! bfd_get_section_contents (abfd
, s
, msg
, (file_ptr
) 0, sz
))
1260 if (! (_bfd_generic_link_add_one_symbol
1261 (info
, abfd
, name
, BSF_WARNING
, s
, (bfd_vma
) 0, msg
,
1262 false, collect
, (struct bfd_link_hash_entry
**) NULL
)))
1265 if (! info
->relocateable
)
1267 /* Clobber the section size so that the warning does
1268 not get copied into the output file. */
1278 /* If we are creating a shared library, create all the dynamic
1279 sections immediately. We need to attach them to something,
1280 so we attach them to this BFD, provided it is the right
1281 format. FIXME: If there are no input BFD's of the same
1282 format as the output, we can't make a shared library. */
1284 && is_elf_hash_table (info
)
1285 && ! hash_table
->dynamic_sections_created
1286 && abfd
->xvec
== info
->hash
->creator
)
1288 if (! elf_link_create_dynamic_sections (abfd
, info
))
1292 else if (! is_elf_hash_table (info
))
1299 bfd_size_type oldsize
;
1300 bfd_size_type strindex
;
1301 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
1303 /* ld --just-symbols and dynamic objects don't mix very well.
1304 Test for --just-symbols by looking at info set up by
1305 _bfd_elf_link_just_syms. */
1306 if ((s
= abfd
->sections
) != NULL
1307 && elf_section_data (s
)->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
)
1310 /* Find the name to use in a DT_NEEDED entry that refers to this
1311 object. If the object has a DT_SONAME entry, we use it.
1312 Otherwise, if the generic linker stuck something in
1313 elf_dt_name, we use that. Otherwise, we just use the file
1314 name. If the generic linker put a null string into
1315 elf_dt_name, we don't make a DT_NEEDED entry at all, even if
1316 there is a DT_SONAME entry. */
1318 name
= bfd_get_filename (abfd
);
1319 if (elf_dt_name (abfd
) != NULL
)
1321 name
= elf_dt_name (abfd
);
1324 if (elf_dt_soname (abfd
) != NULL
)
1330 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1333 Elf_External_Dyn
*dynbuf
= NULL
;
1334 Elf_External_Dyn
*extdyn
;
1335 Elf_External_Dyn
*extdynend
;
1337 unsigned long shlink
;
1339 dynbuf
= (Elf_External_Dyn
*) bfd_malloc (s
->_raw_size
);
1343 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
,
1344 (file_ptr
) 0, s
->_raw_size
))
1345 goto error_free_dyn
;
1347 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1349 goto error_free_dyn
;
1350 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1353 extdynend
= extdyn
+ s
->_raw_size
/ sizeof (Elf_External_Dyn
);
1354 for (; extdyn
< extdynend
; extdyn
++)
1356 Elf_Internal_Dyn dyn
;
1358 elf_swap_dyn_in (abfd
, extdyn
, &dyn
);
1359 if (dyn
.d_tag
== DT_SONAME
)
1361 unsigned int tagv
= dyn
.d_un
.d_val
;
1362 name
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1364 goto error_free_dyn
;
1366 if (dyn
.d_tag
== DT_NEEDED
)
1368 struct bfd_link_needed_list
*n
, **pn
;
1370 unsigned int tagv
= dyn
.d_un
.d_val
;
1372 amt
= sizeof (struct bfd_link_needed_list
);
1373 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1374 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1375 if (n
== NULL
|| fnm
== NULL
)
1376 goto error_free_dyn
;
1377 amt
= strlen (fnm
) + 1;
1378 anm
= bfd_alloc (abfd
, amt
);
1380 goto error_free_dyn
;
1381 memcpy (anm
, fnm
, (size_t) amt
);
1385 for (pn
= & hash_table
->needed
;
1391 if (dyn
.d_tag
== DT_RUNPATH
)
1393 struct bfd_link_needed_list
*n
, **pn
;
1395 unsigned int tagv
= dyn
.d_un
.d_val
;
1397 amt
= sizeof (struct bfd_link_needed_list
);
1398 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1399 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1400 if (n
== NULL
|| fnm
== NULL
)
1401 goto error_free_dyn
;
1402 amt
= strlen (fnm
) + 1;
1403 anm
= bfd_alloc (abfd
, amt
);
1405 goto error_free_dyn
;
1406 memcpy (anm
, fnm
, (size_t) amt
);
1410 for (pn
= & runpath
;
1416 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
1417 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
1419 struct bfd_link_needed_list
*n
, **pn
;
1421 unsigned int tagv
= dyn
.d_un
.d_val
;
1423 amt
= sizeof (struct bfd_link_needed_list
);
1424 n
= (struct bfd_link_needed_list
*) bfd_alloc (abfd
, amt
);
1425 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1426 if (n
== NULL
|| fnm
== NULL
)
1427 goto error_free_dyn
;
1428 amt
= strlen (fnm
) + 1;
1429 anm
= bfd_alloc (abfd
, amt
);
1436 memcpy (anm
, fnm
, (size_t) amt
);
1451 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
1452 frees all more recently bfd_alloc'd blocks as well. */
1458 struct bfd_link_needed_list
**pn
;
1459 for (pn
= & hash_table
->runpath
;
1466 /* We do not want to include any of the sections in a dynamic
1467 object in the output file. We hack by simply clobbering the
1468 list of sections in the BFD. This could be handled more
1469 cleanly by, say, a new section flag; the existing
1470 SEC_NEVER_LOAD flag is not the one we want, because that one
1471 still implies that the section takes up space in the output
1473 bfd_section_list_clear (abfd
);
1475 /* If this is the first dynamic object found in the link, create
1476 the special sections required for dynamic linking. */
1477 if (! hash_table
->dynamic_sections_created
)
1478 if (! elf_link_create_dynamic_sections (abfd
, info
))
1483 /* Add a DT_NEEDED entry for this dynamic object. */
1484 oldsize
= _bfd_elf_strtab_size (hash_table
->dynstr
);
1485 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, name
, false);
1486 if (strindex
== (bfd_size_type
) -1)
1489 if (oldsize
== _bfd_elf_strtab_size (hash_table
->dynstr
))
1492 Elf_External_Dyn
*dyncon
, *dynconend
;
1494 /* The hash table size did not change, which means that
1495 the dynamic object name was already entered. If we
1496 have already included this dynamic object in the
1497 link, just ignore it. There is no reason to include
1498 a particular dynamic object more than once. */
1499 sdyn
= bfd_get_section_by_name (hash_table
->dynobj
, ".dynamic");
1500 BFD_ASSERT (sdyn
!= NULL
);
1502 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
1503 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
1505 for (; dyncon
< dynconend
; dyncon
++)
1507 Elf_Internal_Dyn dyn
;
1509 elf_swap_dyn_in (hash_table
->dynobj
, dyncon
, & dyn
);
1510 if (dyn
.d_tag
== DT_NEEDED
1511 && dyn
.d_un
.d_val
== strindex
)
1513 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
1519 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_NEEDED
, strindex
))
1523 /* Save the SONAME, if there is one, because sometimes the
1524 linker emulation code will need to know it. */
1526 name
= basename (bfd_get_filename (abfd
));
1527 elf_dt_name (abfd
) = name
;
1530 /* If this is a dynamic object, we always link against the .dynsym
1531 symbol table, not the .symtab symbol table. The dynamic linker
1532 will only see the .dynsym symbol table, so there is no reason to
1533 look at .symtab for a dynamic object. */
1535 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
1536 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1538 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1540 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
1542 /* The sh_info field of the symtab header tells us where the
1543 external symbols start. We don't care about the local symbols at
1545 if (elf_bad_symtab (abfd
))
1547 extsymcount
= symcount
;
1552 extsymcount
= symcount
- hdr
->sh_info
;
1553 extsymoff
= hdr
->sh_info
;
1557 if (extsymcount
!= 0)
1559 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
1561 if (isymbuf
== NULL
)
1564 /* We store a pointer to the hash table entry for each external
1566 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
1567 sym_hash
= (struct elf_link_hash_entry
**) bfd_alloc (abfd
, amt
);
1568 if (sym_hash
== NULL
)
1569 goto error_free_sym
;
1570 elf_sym_hashes (abfd
) = sym_hash
;
1575 /* Read in any version definitions. */
1576 if (! _bfd_elf_slurp_version_tables (abfd
))
1577 goto error_free_sym
;
1579 /* Read in the symbol versions, but don't bother to convert them
1580 to internal format. */
1581 if (elf_dynversym (abfd
) != 0)
1583 Elf_Internal_Shdr
*versymhdr
;
1585 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
1586 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
1587 if (extversym
== NULL
)
1588 goto error_free_sym
;
1589 amt
= versymhdr
->sh_size
;
1590 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
1591 || bfd_bread ((PTR
) extversym
, amt
, abfd
) != amt
)
1592 goto error_free_vers
;
1598 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
1599 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
1601 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
1608 struct elf_link_hash_entry
*h
;
1610 boolean size_change_ok
, type_change_ok
;
1611 boolean new_weakdef
;
1612 unsigned int old_alignment
;
1617 flags
= BSF_NO_FLAGS
;
1619 value
= isym
->st_value
;
1622 bind
= ELF_ST_BIND (isym
->st_info
);
1623 if (bind
== STB_LOCAL
)
1625 /* This should be impossible, since ELF requires that all
1626 global symbols follow all local symbols, and that sh_info
1627 point to the first global symbol. Unfortunatealy, Irix 5
1631 else if (bind
== STB_GLOBAL
)
1633 if (isym
->st_shndx
!= SHN_UNDEF
1634 && isym
->st_shndx
!= SHN_COMMON
)
1637 else if (bind
== STB_WEAK
)
1641 /* Leave it up to the processor backend. */
1644 if (isym
->st_shndx
== SHN_UNDEF
)
1645 sec
= bfd_und_section_ptr
;
1646 else if (isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
1648 sec
= section_from_elf_index (abfd
, isym
->st_shndx
);
1650 sec
= bfd_abs_section_ptr
;
1651 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
1654 else if (isym
->st_shndx
== SHN_ABS
)
1655 sec
= bfd_abs_section_ptr
;
1656 else if (isym
->st_shndx
== SHN_COMMON
)
1658 sec
= bfd_com_section_ptr
;
1659 /* What ELF calls the size we call the value. What ELF
1660 calls the value we call the alignment. */
1661 value
= isym
->st_size
;
1665 /* Leave it up to the processor backend. */
1668 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
1670 if (name
== (const char *) NULL
)
1671 goto error_free_vers
;
1673 if (isym
->st_shndx
== SHN_COMMON
1674 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
)
1676 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
1680 tcomm
= bfd_make_section (abfd
, ".tcommon");
1682 || !bfd_set_section_flags (abfd
, tcomm
, (SEC_ALLOC
1684 | SEC_LINKER_CREATED
1685 | SEC_THREAD_LOCAL
)))
1686 goto error_free_vers
;
1690 else if (add_symbol_hook
)
1692 if (! (*add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
, &sec
,
1694 goto error_free_vers
;
1696 /* The hook function sets the name to NULL if this symbol
1697 should be skipped for some reason. */
1698 if (name
== (const char *) NULL
)
1702 /* Sanity check that all possibilities were handled. */
1703 if (sec
== (asection
*) NULL
)
1705 bfd_set_error (bfd_error_bad_value
);
1706 goto error_free_vers
;
1709 if (bfd_is_und_section (sec
)
1710 || bfd_is_com_section (sec
))
1715 size_change_ok
= false;
1716 type_change_ok
= get_elf_backend_data (abfd
)->type_change_ok
;
1718 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1720 Elf_Internal_Versym iver
;
1721 unsigned int vernum
= 0;
1725 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
1726 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
1728 /* If this is a hidden symbol, or if it is not version
1729 1, we append the version name to the symbol name.
1730 However, we do not modify a non-hidden absolute
1731 symbol, because it might be the version symbol
1732 itself. FIXME: What if it isn't? */
1733 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
1734 || (vernum
> 1 && ! bfd_is_abs_section (sec
)))
1737 size_t namelen
, verlen
, newlen
;
1740 if (isym
->st_shndx
!= SHN_UNDEF
)
1742 if (vernum
> elf_tdata (abfd
)->dynverdef_hdr
.sh_info
)
1744 (*_bfd_error_handler
)
1745 (_("%s: %s: invalid version %u (max %d)"),
1746 bfd_archive_filename (abfd
), name
, vernum
,
1747 elf_tdata (abfd
)->dynverdef_hdr
.sh_info
);
1748 bfd_set_error (bfd_error_bad_value
);
1749 goto error_free_vers
;
1751 else if (vernum
> 1)
1753 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1759 /* We cannot simply test for the number of
1760 entries in the VERNEED section since the
1761 numbers for the needed versions do not start
1763 Elf_Internal_Verneed
*t
;
1766 for (t
= elf_tdata (abfd
)->verref
;
1770 Elf_Internal_Vernaux
*a
;
1772 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1774 if (a
->vna_other
== vernum
)
1776 verstr
= a
->vna_nodename
;
1785 (*_bfd_error_handler
)
1786 (_("%s: %s: invalid needed version %d"),
1787 bfd_archive_filename (abfd
), name
, vernum
);
1788 bfd_set_error (bfd_error_bad_value
);
1789 goto error_free_vers
;
1793 namelen
= strlen (name
);
1794 verlen
= strlen (verstr
);
1795 newlen
= namelen
+ verlen
+ 2;
1796 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
1797 && isym
->st_shndx
!= SHN_UNDEF
)
1800 newname
= (char *) bfd_alloc (abfd
, (bfd_size_type
) newlen
);
1801 if (newname
== NULL
)
1802 goto error_free_vers
;
1803 memcpy (newname
, name
, namelen
);
1804 p
= newname
+ namelen
;
1806 /* If this is a defined non-hidden version symbol,
1807 we add another @ to the name. This indicates the
1808 default version of the symbol. */
1809 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
1810 && isym
->st_shndx
!= SHN_UNDEF
)
1812 memcpy (p
, verstr
, verlen
+ 1);
1818 if (! elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
1819 sym_hash
, &override
, &type_change_ok
,
1820 &size_change_ok
, dt_needed
))
1821 goto error_free_vers
;
1827 while (h
->root
.type
== bfd_link_hash_indirect
1828 || h
->root
.type
== bfd_link_hash_warning
)
1829 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1831 /* Remember the old alignment if this is a common symbol, so
1832 that we don't reduce the alignment later on. We can't
1833 check later, because _bfd_generic_link_add_one_symbol
1834 will set a default for the alignment which we want to
1836 if (h
->root
.type
== bfd_link_hash_common
)
1837 old_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1839 if (elf_tdata (abfd
)->verdef
!= NULL
1843 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
1846 if (! (_bfd_generic_link_add_one_symbol
1847 (info
, abfd
, name
, flags
, sec
, value
, (const char *) NULL
,
1848 false, collect
, (struct bfd_link_hash_entry
**) sym_hash
)))
1849 goto error_free_vers
;
1852 while (h
->root
.type
== bfd_link_hash_indirect
1853 || h
->root
.type
== bfd_link_hash_warning
)
1854 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1857 new_weakdef
= false;
1860 && (flags
& BSF_WEAK
) != 0
1861 && ELF_ST_TYPE (isym
->st_info
) != STT_FUNC
1862 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
1863 && h
->weakdef
== NULL
)
1865 /* Keep a list of all weak defined non function symbols from
1866 a dynamic object, using the weakdef field. Later in this
1867 function we will set the weakdef field to the correct
1868 value. We only put non-function symbols from dynamic
1869 objects on this list, because that happens to be the only
1870 time we need to know the normal symbol corresponding to a
1871 weak symbol, and the information is time consuming to
1872 figure out. If the weakdef field is not already NULL,
1873 then this symbol was already defined by some previous
1874 dynamic object, and we will be using that previous
1875 definition anyhow. */
1882 /* Set the alignment of a common symbol. */
1883 if (isym
->st_shndx
== SHN_COMMON
1884 && h
->root
.type
== bfd_link_hash_common
)
1888 align
= bfd_log2 (isym
->st_value
);
1889 if (align
> old_alignment
1890 /* Permit an alignment power of zero if an alignment of one
1891 is specified and no other alignments have been specified. */
1892 || (isym
->st_value
== 1 && old_alignment
== 0))
1893 h
->root
.u
.c
.p
->alignment_power
= align
;
1896 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1902 /* Remember the symbol size and type. */
1903 if (isym
->st_size
!= 0
1904 && (definition
|| h
->size
== 0))
1906 if (h
->size
!= 0 && h
->size
!= isym
->st_size
&& ! size_change_ok
)
1907 (*_bfd_error_handler
)
1908 (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"),
1909 name
, (unsigned long) h
->size
,
1910 (unsigned long) isym
->st_size
, bfd_archive_filename (abfd
));
1912 h
->size
= isym
->st_size
;
1915 /* If this is a common symbol, then we always want H->SIZE
1916 to be the size of the common symbol. The code just above
1917 won't fix the size if a common symbol becomes larger. We
1918 don't warn about a size change here, because that is
1919 covered by --warn-common. */
1920 if (h
->root
.type
== bfd_link_hash_common
)
1921 h
->size
= h
->root
.u
.c
.size
;
1923 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
1924 && (definition
|| h
->type
== STT_NOTYPE
))
1926 if (h
->type
!= STT_NOTYPE
1927 && h
->type
!= ELF_ST_TYPE (isym
->st_info
)
1928 && ! type_change_ok
)
1929 (*_bfd_error_handler
)
1930 (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
1931 name
, h
->type
, ELF_ST_TYPE (isym
->st_info
),
1932 bfd_archive_filename (abfd
));
1934 h
->type
= ELF_ST_TYPE (isym
->st_info
);
1937 /* If st_other has a processor-specific meaning, specific code
1938 might be needed here. */
1939 if (isym
->st_other
!= 0)
1941 unsigned char hvis
, symvis
, other
;
1943 /* Take the balance of OTHER from the definition. */
1944 other
= (definition
? isym
->st_other
: h
->other
);
1945 other
&= ~ ELF_ST_VISIBILITY (-1);
1947 /* Combine visibilities, using the most constraining one. */
1948 hvis
= ELF_ST_VISIBILITY (h
->other
);
1949 symvis
= ELF_ST_VISIBILITY (isym
->st_other
);
1951 h
->other
= other
| (hvis
> symvis
? hvis
: symvis
);
1954 /* Set a flag in the hash table entry indicating the type of
1955 reference or definition we just found. Keep a count of
1956 the number of dynamic symbols we find. A dynamic symbol
1957 is one which is referenced or defined by both a regular
1958 object and a shared object. */
1959 old_flags
= h
->elf_link_hash_flags
;
1965 new_flag
= ELF_LINK_HASH_REF_REGULAR
;
1966 if (bind
!= STB_WEAK
)
1967 new_flag
|= ELF_LINK_HASH_REF_REGULAR_NONWEAK
;
1970 new_flag
= ELF_LINK_HASH_DEF_REGULAR
;
1972 || (old_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
1973 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0)
1979 new_flag
= ELF_LINK_HASH_REF_DYNAMIC
;
1981 new_flag
= ELF_LINK_HASH_DEF_DYNAMIC
;
1982 if ((old_flags
& (ELF_LINK_HASH_DEF_REGULAR
1983 | ELF_LINK_HASH_REF_REGULAR
)) != 0
1984 || (h
->weakdef
!= NULL
1986 && h
->weakdef
->dynindx
!= -1))
1990 h
->elf_link_hash_flags
|= new_flag
;
1992 /* Check to see if we need to add an indirect symbol for
1993 the default name. */
1994 if (definition
|| h
->root
.type
== bfd_link_hash_common
)
1995 if (! elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
1996 &sec
, &value
, &dynsym
,
1997 override
, dt_needed
))
1998 goto error_free_vers
;
2000 if (dynsym
&& h
->dynindx
== -1)
2002 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2003 goto error_free_vers
;
2004 if (h
->weakdef
!= NULL
2006 && h
->weakdef
->dynindx
== -1)
2008 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
->weakdef
))
2009 goto error_free_vers
;
2012 else if (dynsym
&& h
->dynindx
!= -1)
2013 /* If the symbol already has a dynamic index, but
2014 visibility says it should not be visible, turn it into
2016 switch (ELF_ST_VISIBILITY (h
->other
))
2020 (*bed
->elf_backend_hide_symbol
) (info
, h
, true);
2024 if (dt_needed
&& definition
2025 && (h
->elf_link_hash_flags
2026 & ELF_LINK_HASH_REF_REGULAR
) != 0)
2028 bfd_size_type oldsize
;
2029 bfd_size_type strindex
;
2031 if (! is_elf_hash_table (info
))
2032 goto error_free_vers
;
2034 /* The symbol from a DT_NEEDED object is referenced from
2035 the regular object to create a dynamic executable. We
2036 have to make sure there is a DT_NEEDED entry for it. */
2039 oldsize
= _bfd_elf_strtab_size (hash_table
->dynstr
);
2040 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
,
2041 elf_dt_soname (abfd
), false);
2042 if (strindex
== (bfd_size_type
) -1)
2043 goto error_free_vers
;
2045 if (oldsize
== _bfd_elf_strtab_size (hash_table
->dynstr
))
2048 Elf_External_Dyn
*dyncon
, *dynconend
;
2050 sdyn
= bfd_get_section_by_name (hash_table
->dynobj
,
2052 BFD_ASSERT (sdyn
!= NULL
);
2054 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
2055 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
2057 for (; dyncon
< dynconend
; dyncon
++)
2059 Elf_Internal_Dyn dyn
;
2061 elf_swap_dyn_in (hash_table
->dynobj
,
2063 BFD_ASSERT (dyn
.d_tag
!= DT_NEEDED
||
2064 dyn
.d_un
.d_val
!= strindex
);
2068 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_NEEDED
, strindex
))
2069 goto error_free_vers
;
2074 if (extversym
!= NULL
)
2080 if (isymbuf
!= NULL
)
2084 /* Now set the weakdefs field correctly for all the weak defined
2085 symbols we found. The only way to do this is to search all the
2086 symbols. Since we only need the information for non functions in
2087 dynamic objects, that's the only time we actually put anything on
2088 the list WEAKS. We need this information so that if a regular
2089 object refers to a symbol defined weakly in a dynamic object, the
2090 real symbol in the dynamic object is also put in the dynamic
2091 symbols; we also must arrange for both symbols to point to the
2092 same memory location. We could handle the general case of symbol
2093 aliasing, but a general symbol alias can only be generated in
2094 assembler code, handling it correctly would be very time
2095 consuming, and other ELF linkers don't handle general aliasing
2097 while (weaks
!= NULL
)
2099 struct elf_link_hash_entry
*hlook
;
2102 struct elf_link_hash_entry
**hpp
;
2103 struct elf_link_hash_entry
**hppend
;
2106 weaks
= hlook
->weakdef
;
2107 hlook
->weakdef
= NULL
;
2109 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
2110 || hlook
->root
.type
== bfd_link_hash_defweak
2111 || hlook
->root
.type
== bfd_link_hash_common
2112 || hlook
->root
.type
== bfd_link_hash_indirect
);
2113 slook
= hlook
->root
.u
.def
.section
;
2114 vlook
= hlook
->root
.u
.def
.value
;
2116 hpp
= elf_sym_hashes (abfd
);
2117 hppend
= hpp
+ extsymcount
;
2118 for (; hpp
< hppend
; hpp
++)
2120 struct elf_link_hash_entry
*h
;
2123 if (h
!= NULL
&& h
!= hlook
2124 && h
->root
.type
== bfd_link_hash_defined
2125 && h
->root
.u
.def
.section
== slook
2126 && h
->root
.u
.def
.value
== vlook
)
2130 /* If the weak definition is in the list of dynamic
2131 symbols, make sure the real definition is put there
2133 if (hlook
->dynindx
!= -1
2134 && h
->dynindx
== -1)
2136 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2140 /* If the real definition is in the list of dynamic
2141 symbols, make sure the weak definition is put there
2142 as well. If we don't do this, then the dynamic
2143 loader might not merge the entries for the real
2144 definition and the weak definition. */
2145 if (h
->dynindx
!= -1
2146 && hlook
->dynindx
== -1)
2148 if (! _bfd_elf_link_record_dynamic_symbol (info
, hlook
))
2156 /* If this object is the same format as the output object, and it is
2157 not a shared library, then let the backend look through the
2160 This is required to build global offset table entries and to
2161 arrange for dynamic relocs. It is not required for the
2162 particular common case of linking non PIC code, even when linking
2163 against shared libraries, but unfortunately there is no way of
2164 knowing whether an object file has been compiled PIC or not.
2165 Looking through the relocs is not particularly time consuming.
2166 The problem is that we must either (1) keep the relocs in memory,
2167 which causes the linker to require additional runtime memory or
2168 (2) read the relocs twice from the input file, which wastes time.
2169 This would be a good case for using mmap.
2171 I have no idea how to handle linking PIC code into a file of a
2172 different format. It probably can't be done. */
2173 check_relocs
= get_elf_backend_data (abfd
)->check_relocs
;
2175 && abfd
->xvec
== info
->hash
->creator
2176 && check_relocs
!= NULL
)
2180 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2182 Elf_Internal_Rela
*internal_relocs
;
2185 if ((o
->flags
& SEC_RELOC
) == 0
2186 || o
->reloc_count
== 0
2187 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
2188 && (o
->flags
& SEC_DEBUGGING
) != 0)
2189 || bfd_is_abs_section (o
->output_section
))
2192 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
2193 (abfd
, o
, (PTR
) NULL
,
2194 (Elf_Internal_Rela
*) NULL
,
2195 info
->keep_memory
));
2196 if (internal_relocs
== NULL
)
2199 ok
= (*check_relocs
) (abfd
, info
, o
, internal_relocs
);
2201 if (elf_section_data (o
)->relocs
!= internal_relocs
)
2202 free (internal_relocs
);
2209 /* If this is a non-traditional link, try to optimize the handling
2210 of the .stab/.stabstr sections. */
2212 && ! info
->traditional_format
2213 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
2214 && is_elf_hash_table (info
)
2215 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
2217 asection
*stab
, *stabstr
;
2219 stab
= bfd_get_section_by_name (abfd
, ".stab");
2221 && (stab
->flags
& SEC_MERGE
) == 0
2222 && !bfd_is_abs_section (stab
->output_section
))
2224 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
2226 if (stabstr
!= NULL
)
2228 struct bfd_elf_section_data
*secdata
;
2230 secdata
= elf_section_data (stab
);
2231 if (! _bfd_link_section_stabs (abfd
,
2232 & hash_table
->stab_info
,
2234 &secdata
->sec_info
))
2236 if (secdata
->sec_info
)
2237 secdata
->sec_info_type
= ELF_INFO_TYPE_STABS
;
2242 if (! info
->relocateable
&& ! dynamic
2243 && is_elf_hash_table (info
))
2247 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
2248 if ((s
->flags
& SEC_MERGE
) != 0
2249 && !bfd_is_abs_section (s
->output_section
))
2251 struct bfd_elf_section_data
*secdata
;
2253 secdata
= elf_section_data (s
);
2254 if (! _bfd_merge_section (abfd
,
2255 & hash_table
->merge_info
,
2256 s
, &secdata
->sec_info
))
2258 else if (secdata
->sec_info
)
2259 secdata
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
2263 if (is_elf_hash_table (info
))
2265 /* Add this bfd to the loaded list. */
2266 struct elf_link_loaded_list
*n
;
2268 n
= ((struct elf_link_loaded_list
*)
2269 bfd_alloc (abfd
, sizeof (struct elf_link_loaded_list
)));
2273 n
->next
= hash_table
->loaded
;
2274 hash_table
->loaded
= n
;
2280 if (extversym
!= NULL
)
2283 if (isymbuf
!= NULL
)
2289 /* Create some sections which will be filled in with dynamic linking
2290 information. ABFD is an input file which requires dynamic sections
2291 to be created. The dynamic sections take up virtual memory space
2292 when the final executable is run, so we need to create them before
2293 addresses are assigned to the output sections. We work out the
2294 actual contents and size of these sections later. */
2297 elf_link_create_dynamic_sections (abfd
, info
)
2299 struct bfd_link_info
*info
;
2302 register asection
*s
;
2303 struct elf_link_hash_entry
*h
;
2304 struct bfd_link_hash_entry
*bh
;
2305 struct elf_backend_data
*bed
;
2307 if (! is_elf_hash_table (info
))
2310 if (elf_hash_table (info
)->dynamic_sections_created
)
2313 /* Make sure that all dynamic sections use the same input BFD. */
2314 if (elf_hash_table (info
)->dynobj
== NULL
)
2315 elf_hash_table (info
)->dynobj
= abfd
;
2317 abfd
= elf_hash_table (info
)->dynobj
;
2319 /* Note that we set the SEC_IN_MEMORY flag for all of these
2321 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
2322 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2324 /* A dynamically linked executable has a .interp section, but a
2325 shared library does not. */
2328 s
= bfd_make_section (abfd
, ".interp");
2330 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
2334 if (! info
->traditional_format
2335 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
2337 s
= bfd_make_section (abfd
, ".eh_frame_hdr");
2339 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2340 || ! bfd_set_section_alignment (abfd
, s
, 2))
2342 elf_hash_table (info
)->eh_info
.hdr_sec
= s
;
2345 /* Create sections to hold version informations. These are removed
2346 if they are not needed. */
2347 s
= bfd_make_section (abfd
, ".gnu.version_d");
2349 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2350 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2353 s
= bfd_make_section (abfd
, ".gnu.version");
2355 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2356 || ! bfd_set_section_alignment (abfd
, s
, 1))
2359 s
= bfd_make_section (abfd
, ".gnu.version_r");
2361 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2362 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2365 s
= bfd_make_section (abfd
, ".dynsym");
2367 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2368 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2371 s
= bfd_make_section (abfd
, ".dynstr");
2373 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
2376 /* Create a strtab to hold the dynamic symbol names. */
2377 if (elf_hash_table (info
)->dynstr
== NULL
)
2379 elf_hash_table (info
)->dynstr
= _bfd_elf_strtab_init ();
2380 if (elf_hash_table (info
)->dynstr
== NULL
)
2384 s
= bfd_make_section (abfd
, ".dynamic");
2386 || ! bfd_set_section_flags (abfd
, s
, flags
)
2387 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2390 /* The special symbol _DYNAMIC is always set to the start of the
2391 .dynamic section. This call occurs before we have processed the
2392 symbols for any dynamic object, so we don't have to worry about
2393 overriding a dynamic definition. We could set _DYNAMIC in a
2394 linker script, but we only want to define it if we are, in fact,
2395 creating a .dynamic section. We don't want to define it if there
2396 is no .dynamic section, since on some ELF platforms the start up
2397 code examines it to decide how to initialize the process. */
2399 if (! (_bfd_generic_link_add_one_symbol
2400 (info
, abfd
, "_DYNAMIC", BSF_GLOBAL
, s
, (bfd_vma
) 0,
2401 (const char *) 0, false, get_elf_backend_data (abfd
)->collect
, &bh
)))
2403 h
= (struct elf_link_hash_entry
*) bh
;
2404 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2405 h
->type
= STT_OBJECT
;
2408 && ! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2411 bed
= get_elf_backend_data (abfd
);
2413 s
= bfd_make_section (abfd
, ".hash");
2415 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2416 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2418 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
2420 /* Let the backend create the rest of the sections. This lets the
2421 backend set the right flags. The backend will normally create
2422 the .got and .plt sections. */
2423 if (! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
2426 elf_hash_table (info
)->dynamic_sections_created
= true;
2431 /* Add an entry to the .dynamic table. */
2434 elf_add_dynamic_entry (info
, tag
, val
)
2435 struct bfd_link_info
*info
;
2439 Elf_Internal_Dyn dyn
;
2442 bfd_size_type newsize
;
2443 bfd_byte
*newcontents
;
2445 if (! is_elf_hash_table (info
))
2448 dynobj
= elf_hash_table (info
)->dynobj
;
2450 s
= bfd_get_section_by_name (dynobj
, ".dynamic");
2451 BFD_ASSERT (s
!= NULL
);
2453 newsize
= s
->_raw_size
+ sizeof (Elf_External_Dyn
);
2454 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
2455 if (newcontents
== NULL
)
2459 dyn
.d_un
.d_val
= val
;
2460 elf_swap_dyn_out (dynobj
, &dyn
,
2461 (Elf_External_Dyn
*) (newcontents
+ s
->_raw_size
));
2463 s
->_raw_size
= newsize
;
2464 s
->contents
= newcontents
;
2469 /* Read and swap the relocs from the section indicated by SHDR. This
2470 may be either a REL or a RELA section. The relocations are
2471 translated into RELA relocations and stored in INTERNAL_RELOCS,
2472 which should have already been allocated to contain enough space.
2473 The EXTERNAL_RELOCS are a buffer where the external form of the
2474 relocations should be stored.
2476 Returns false if something goes wrong. */
2479 elf_link_read_relocs_from_section (abfd
, shdr
, external_relocs
,
2482 Elf_Internal_Shdr
*shdr
;
2483 PTR external_relocs
;
2484 Elf_Internal_Rela
*internal_relocs
;
2486 struct elf_backend_data
*bed
;
2489 /* If there aren't any relocations, that's OK. */
2493 /* Position ourselves at the start of the section. */
2494 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2497 /* Read the relocations. */
2498 if (bfd_bread (external_relocs
, shdr
->sh_size
, abfd
) != shdr
->sh_size
)
2501 bed
= get_elf_backend_data (abfd
);
2503 /* Convert the external relocations to the internal format. */
2504 if (shdr
->sh_entsize
== sizeof (Elf_External_Rel
))
2506 Elf_External_Rel
*erel
;
2507 Elf_External_Rel
*erelend
;
2508 Elf_Internal_Rela
*irela
;
2509 Elf_Internal_Rel
*irel
;
2511 erel
= (Elf_External_Rel
*) external_relocs
;
2512 erelend
= erel
+ NUM_SHDR_ENTRIES (shdr
);
2513 irela
= internal_relocs
;
2514 amt
= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rel
);
2515 irel
= bfd_alloc (abfd
, amt
);
2516 for (; erel
< erelend
; erel
++, irela
+= bed
->s
->int_rels_per_ext_rel
)
2520 if (bed
->s
->swap_reloc_in
)
2521 (*bed
->s
->swap_reloc_in
) (abfd
, (bfd_byte
*) erel
, irel
);
2523 elf_swap_reloc_in (abfd
, erel
, irel
);
2525 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; ++i
)
2527 irela
[i
].r_offset
= irel
[i
].r_offset
;
2528 irela
[i
].r_info
= irel
[i
].r_info
;
2529 irela
[i
].r_addend
= 0;
2535 Elf_External_Rela
*erela
;
2536 Elf_External_Rela
*erelaend
;
2537 Elf_Internal_Rela
*irela
;
2539 BFD_ASSERT (shdr
->sh_entsize
== sizeof (Elf_External_Rela
));
2541 erela
= (Elf_External_Rela
*) external_relocs
;
2542 erelaend
= erela
+ NUM_SHDR_ENTRIES (shdr
);
2543 irela
= internal_relocs
;
2544 for (; erela
< erelaend
; erela
++, irela
+= bed
->s
->int_rels_per_ext_rel
)
2546 if (bed
->s
->swap_reloca_in
)
2547 (*bed
->s
->swap_reloca_in
) (abfd
, (bfd_byte
*) erela
, irela
);
2549 elf_swap_reloca_in (abfd
, erela
, irela
);
2556 /* Read and swap the relocs for a section O. They may have been
2557 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2558 not NULL, they are used as buffers to read into. They are known to
2559 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2560 the return value is allocated using either malloc or bfd_alloc,
2561 according to the KEEP_MEMORY argument. If O has two relocation
2562 sections (both REL and RELA relocations), then the REL_HDR
2563 relocations will appear first in INTERNAL_RELOCS, followed by the
2564 REL_HDR2 relocations. */
2567 NAME(_bfd_elf
,link_read_relocs
) (abfd
, o
, external_relocs
, internal_relocs
,
2571 PTR external_relocs
;
2572 Elf_Internal_Rela
*internal_relocs
;
2573 boolean keep_memory
;
2575 Elf_Internal_Shdr
*rel_hdr
;
2577 Elf_Internal_Rela
*alloc2
= NULL
;
2578 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2580 if (elf_section_data (o
)->relocs
!= NULL
)
2581 return elf_section_data (o
)->relocs
;
2583 if (o
->reloc_count
== 0)
2586 rel_hdr
= &elf_section_data (o
)->rel_hdr
;
2588 if (internal_relocs
== NULL
)
2592 size
= o
->reloc_count
;
2593 size
*= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
2595 internal_relocs
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2597 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2598 if (internal_relocs
== NULL
)
2602 if (external_relocs
== NULL
)
2604 bfd_size_type size
= rel_hdr
->sh_size
;
2606 if (elf_section_data (o
)->rel_hdr2
)
2607 size
+= elf_section_data (o
)->rel_hdr2
->sh_size
;
2608 alloc1
= (PTR
) bfd_malloc (size
);
2611 external_relocs
= alloc1
;
2614 if (!elf_link_read_relocs_from_section (abfd
, rel_hdr
,
2618 if (!elf_link_read_relocs_from_section
2620 elf_section_data (o
)->rel_hdr2
,
2621 ((bfd_byte
*) external_relocs
) + rel_hdr
->sh_size
,
2622 internal_relocs
+ (NUM_SHDR_ENTRIES (rel_hdr
)
2623 * bed
->s
->int_rels_per_ext_rel
)))
2626 /* Cache the results for next time, if we can. */
2628 elf_section_data (o
)->relocs
= internal_relocs
;
2633 /* Don't free alloc2, since if it was allocated we are passing it
2634 back (under the name of internal_relocs). */
2636 return internal_relocs
;
2646 /* Record an assignment to a symbol made by a linker script. We need
2647 this in case some dynamic object refers to this symbol. */
2650 NAME(bfd_elf
,record_link_assignment
) (output_bfd
, info
, name
, provide
)
2651 bfd
*output_bfd ATTRIBUTE_UNUSED
;
2652 struct bfd_link_info
*info
;
2656 struct elf_link_hash_entry
*h
;
2658 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2661 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, true, true, false);
2665 if (h
->root
.type
== bfd_link_hash_new
)
2666 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_ELF
;
2668 /* If this symbol is being provided by the linker script, and it is
2669 currently defined by a dynamic object, but not by a regular
2670 object, then mark it as undefined so that the generic linker will
2671 force the correct value. */
2673 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2674 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2675 h
->root
.type
= bfd_link_hash_undefined
;
2677 /* If this symbol is not being provided by the linker script, and it is
2678 currently defined by a dynamic object, but not by a regular object,
2679 then clear out any version information because the symbol will not be
2680 associated with the dynamic object any more. */
2682 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2683 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2684 h
->verinfo
.verdef
= NULL
;
2686 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2688 if (((h
->elf_link_hash_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
2689 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0
2691 && h
->dynindx
== -1)
2693 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2696 /* If this is a weak defined symbol, and we know a corresponding
2697 real symbol from the same dynamic object, make sure the real
2698 symbol is also made into a dynamic symbol. */
2699 if (h
->weakdef
!= NULL
2700 && h
->weakdef
->dynindx
== -1)
2702 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
->weakdef
))
2710 /* This structure is used to pass information to
2711 elf_link_assign_sym_version. */
2713 struct elf_assign_sym_version_info
2717 /* General link information. */
2718 struct bfd_link_info
*info
;
2720 struct bfd_elf_version_tree
*verdefs
;
2721 /* Whether we had a failure. */
2725 /* This structure is used to pass information to
2726 elf_link_find_version_dependencies. */
2728 struct elf_find_verdep_info
2732 /* General link information. */
2733 struct bfd_link_info
*info
;
2734 /* The number of dependencies. */
2736 /* Whether we had a failure. */
2740 /* Array used to determine the number of hash table buckets to use
2741 based on the number of symbols there are. If there are fewer than
2742 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
2743 fewer than 37 we use 17 buckets, and so forth. We never use more
2744 than 32771 buckets. */
2746 static const size_t elf_buckets
[] =
2748 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
2752 /* Compute bucket count for hashing table. We do not use a static set
2753 of possible tables sizes anymore. Instead we determine for all
2754 possible reasonable sizes of the table the outcome (i.e., the
2755 number of collisions etc) and choose the best solution. The
2756 weighting functions are not too simple to allow the table to grow
2757 without bounds. Instead one of the weighting factors is the size.
2758 Therefore the result is always a good payoff between few collisions
2759 (= short chain lengths) and table size. */
2761 compute_bucket_count (info
)
2762 struct bfd_link_info
*info
;
2764 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
2765 size_t best_size
= 0;
2766 unsigned long int *hashcodes
;
2767 unsigned long int *hashcodesp
;
2768 unsigned long int i
;
2771 /* Compute the hash values for all exported symbols. At the same
2772 time store the values in an array so that we could use them for
2775 amt
*= sizeof (unsigned long int);
2776 hashcodes
= (unsigned long int *) bfd_malloc (amt
);
2777 if (hashcodes
== NULL
)
2779 hashcodesp
= hashcodes
;
2781 /* Put all hash values in HASHCODES. */
2782 elf_link_hash_traverse (elf_hash_table (info
),
2783 elf_collect_hash_codes
, &hashcodesp
);
2785 /* We have a problem here. The following code to optimize the table
2786 size requires an integer type with more the 32 bits. If
2787 BFD_HOST_U_64_BIT is set we know about such a type. */
2788 #ifdef BFD_HOST_U_64_BIT
2791 unsigned long int nsyms
= hashcodesp
- hashcodes
;
2794 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
2795 unsigned long int *counts
;
2797 /* Possible optimization parameters: if we have NSYMS symbols we say
2798 that the hashing table must at least have NSYMS/4 and at most
2800 minsize
= nsyms
/ 4;
2803 best_size
= maxsize
= nsyms
* 2;
2805 /* Create array where we count the collisions in. We must use bfd_malloc
2806 since the size could be large. */
2808 amt
*= sizeof (unsigned long int);
2809 counts
= (unsigned long int *) bfd_malloc (amt
);
2816 /* Compute the "optimal" size for the hash table. The criteria is a
2817 minimal chain length. The minor criteria is (of course) the size
2819 for (i
= minsize
; i
< maxsize
; ++i
)
2821 /* Walk through the array of hashcodes and count the collisions. */
2822 BFD_HOST_U_64_BIT max
;
2823 unsigned long int j
;
2824 unsigned long int fact
;
2826 memset (counts
, '\0', i
* sizeof (unsigned long int));
2828 /* Determine how often each hash bucket is used. */
2829 for (j
= 0; j
< nsyms
; ++j
)
2830 ++counts
[hashcodes
[j
] % i
];
2832 /* For the weight function we need some information about the
2833 pagesize on the target. This is information need not be 100%
2834 accurate. Since this information is not available (so far) we
2835 define it here to a reasonable default value. If it is crucial
2836 to have a better value some day simply define this value. */
2837 # ifndef BFD_TARGET_PAGESIZE
2838 # define BFD_TARGET_PAGESIZE (4096)
2841 /* We in any case need 2 + NSYMS entries for the size values and
2843 max
= (2 + nsyms
) * (ARCH_SIZE
/ 8);
2846 /* Variant 1: optimize for short chains. We add the squares
2847 of all the chain lengths (which favous many small chain
2848 over a few long chains). */
2849 for (j
= 0; j
< i
; ++j
)
2850 max
+= counts
[j
] * counts
[j
];
2852 /* This adds penalties for the overall size of the table. */
2853 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2856 /* Variant 2: Optimize a lot more for small table. Here we
2857 also add squares of the size but we also add penalties for
2858 empty slots (the +1 term). */
2859 for (j
= 0; j
< i
; ++j
)
2860 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
2862 /* The overall size of the table is considered, but not as
2863 strong as in variant 1, where it is squared. */
2864 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2868 /* Compare with current best results. */
2869 if (max
< best_chlen
)
2879 #endif /* defined (BFD_HOST_U_64_BIT) */
2881 /* This is the fallback solution if no 64bit type is available or if we
2882 are not supposed to spend much time on optimizations. We select the
2883 bucket count using a fixed set of numbers. */
2884 for (i
= 0; elf_buckets
[i
] != 0; i
++)
2886 best_size
= elf_buckets
[i
];
2887 if (dynsymcount
< elf_buckets
[i
+ 1])
2892 /* Free the arrays we needed. */
2898 /* Set up the sizes and contents of the ELF dynamic sections. This is
2899 called by the ELF linker emulation before_allocation routine. We
2900 must set the sizes of the sections before the linker sets the
2901 addresses of the various sections. */
2904 NAME(bfd_elf
,size_dynamic_sections
) (output_bfd
, soname
, rpath
,
2906 auxiliary_filters
, info
, sinterpptr
,
2911 const char *filter_shlib
;
2912 const char * const *auxiliary_filters
;
2913 struct bfd_link_info
*info
;
2914 asection
**sinterpptr
;
2915 struct bfd_elf_version_tree
*verdefs
;
2917 bfd_size_type soname_indx
;
2919 struct elf_backend_data
*bed
;
2920 struct elf_assign_sym_version_info asvinfo
;
2924 soname_indx
= (bfd_size_type
) -1;
2926 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2929 if (! is_elf_hash_table (info
))
2932 /* Any syms created from now on start with -1 in
2933 got.refcount/offset and plt.refcount/offset. */
2934 elf_hash_table (info
)->init_refcount
= -1;
2936 /* The backend may have to create some sections regardless of whether
2937 we're dynamic or not. */
2938 bed
= get_elf_backend_data (output_bfd
);
2939 if (bed
->elf_backend_always_size_sections
2940 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
2943 dynobj
= elf_hash_table (info
)->dynobj
;
2945 /* If there were no dynamic objects in the link, there is nothing to
2950 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
2953 if (elf_hash_table (info
)->dynamic_sections_created
)
2955 struct elf_info_failed eif
;
2956 struct elf_link_hash_entry
*h
;
2958 struct bfd_elf_version_tree
*t
;
2959 struct bfd_elf_version_expr
*d
;
2960 boolean all_defined
;
2962 *sinterpptr
= bfd_get_section_by_name (dynobj
, ".interp");
2963 BFD_ASSERT (*sinterpptr
!= NULL
|| info
->shared
);
2967 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
2969 if (soname_indx
== (bfd_size_type
) -1
2970 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SONAME
,
2977 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SYMBOLIC
,
2980 info
->flags
|= DF_SYMBOLIC
;
2987 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
2989 if (info
->new_dtags
)
2990 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
, indx
);
2991 if (indx
== (bfd_size_type
) -1
2992 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_RPATH
, indx
)
2994 && ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_RUNPATH
,
2999 if (filter_shlib
!= NULL
)
3003 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3004 filter_shlib
, true);
3005 if (indx
== (bfd_size_type
) -1
3006 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FILTER
, indx
))
3010 if (auxiliary_filters
!= NULL
)
3012 const char * const *p
;
3014 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
3018 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3020 if (indx
== (bfd_size_type
) -1
3021 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_AUXILIARY
,
3028 eif
.verdefs
= verdefs
;
3031 /* If we are supposed to export all symbols into the dynamic symbol
3032 table (this is not the normal case), then do so. */
3033 if (info
->export_dynamic
)
3035 elf_link_hash_traverse (elf_hash_table (info
), elf_export_symbol
,
3041 /* Make all global versions with definiton. */
3042 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3043 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3044 if (!d
->symver
&& strchr (d
->pattern
, '*') == NULL
)
3046 const char *verstr
, *name
;
3047 size_t namelen
, verlen
, newlen
;
3049 struct elf_link_hash_entry
*newh
;
3052 namelen
= strlen (name
);
3054 verlen
= strlen (verstr
);
3055 newlen
= namelen
+ verlen
+ 3;
3057 newname
= (char *) bfd_malloc ((bfd_size_type
) newlen
);
3058 if (newname
== NULL
)
3060 memcpy (newname
, name
, namelen
);
3062 /* Check the hidden versioned definition. */
3063 p
= newname
+ namelen
;
3065 memcpy (p
, verstr
, verlen
+ 1);
3066 newh
= elf_link_hash_lookup (elf_hash_table (info
),
3067 newname
, false, false,
3070 || (newh
->root
.type
!= bfd_link_hash_defined
3071 && newh
->root
.type
!= bfd_link_hash_defweak
))
3073 /* Check the default versioned definition. */
3075 memcpy (p
, verstr
, verlen
+ 1);
3076 newh
= elf_link_hash_lookup (elf_hash_table (info
),
3077 newname
, false, false,
3082 /* Mark this version if there is a definition and it is
3083 not defined in a shared object. */
3085 && ((newh
->elf_link_hash_flags
3086 & ELF_LINK_HASH_DEF_DYNAMIC
) == 0)
3087 && (newh
->root
.type
== bfd_link_hash_defined
3088 || newh
->root
.type
== bfd_link_hash_defweak
))
3092 /* Attach all the symbols to their version information. */
3093 asvinfo
.output_bfd
= output_bfd
;
3094 asvinfo
.info
= info
;
3095 asvinfo
.verdefs
= verdefs
;
3096 asvinfo
.failed
= false;
3098 elf_link_hash_traverse (elf_hash_table (info
),
3099 elf_link_assign_sym_version
,
3104 if (!info
->allow_undefined_version
)
3106 /* Check if all global versions have a definiton. */
3108 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3109 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3110 if (!d
->symver
&& !d
->script
3111 && strchr (d
->pattern
, '*') == NULL
)
3113 (*_bfd_error_handler
)
3114 (_("%s: undefined version: %s"),
3115 d
->pattern
, t
->name
);
3116 all_defined
= false;
3121 bfd_set_error (bfd_error_bad_value
);
3126 /* Find all symbols which were defined in a dynamic object and make
3127 the backend pick a reasonable value for them. */
3128 elf_link_hash_traverse (elf_hash_table (info
),
3129 elf_adjust_dynamic_symbol
,
3134 /* Add some entries to the .dynamic section. We fill in some of the
3135 values later, in elf_bfd_final_link, but we must add the entries
3136 now so that we know the final size of the .dynamic section. */
3138 /* If there are initialization and/or finalization functions to
3139 call then add the corresponding DT_INIT/DT_FINI entries. */
3140 h
= (info
->init_function
3141 ? elf_link_hash_lookup (elf_hash_table (info
),
3142 info
->init_function
, false,
3146 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
3147 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
3149 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_INIT
, (bfd_vma
) 0))
3152 h
= (info
->fini_function
3153 ? elf_link_hash_lookup (elf_hash_table (info
),
3154 info
->fini_function
, false,
3158 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
3159 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
3161 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FINI
, (bfd_vma
) 0))
3165 if (bfd_get_section_by_name (output_bfd
, ".preinit_array") != NULL
)
3167 /* DT_PREINIT_ARRAY is not allowed in shared library. */
3173 for (sub
= info
->input_bfds
; sub
!= NULL
;
3174 sub
= sub
->link_next
)
3175 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
3176 if (elf_section_data (o
)->this_hdr
.sh_type
3177 == SHT_PREINIT_ARRAY
)
3179 (*_bfd_error_handler
)
3180 (_("%s: .preinit_array section is not allowed in DSO"),
3181 bfd_archive_filename (sub
));
3185 bfd_set_error (bfd_error_nonrepresentable_section
);
3189 if (!elf_add_dynamic_entry (info
, (bfd_vma
) DT_PREINIT_ARRAY
,
3191 || !elf_add_dynamic_entry (info
, (bfd_vma
) DT_PREINIT_ARRAYSZ
,
3195 if (bfd_get_section_by_name (output_bfd
, ".init_array") != NULL
)
3197 if (!elf_add_dynamic_entry (info
, (bfd_vma
) DT_INIT_ARRAY
,
3199 || !elf_add_dynamic_entry (info
, (bfd_vma
) DT_INIT_ARRAYSZ
,
3203 if (bfd_get_section_by_name (output_bfd
, ".fini_array") != NULL
)
3205 if (!elf_add_dynamic_entry (info
, (bfd_vma
) DT_FINI_ARRAY
,
3207 || !elf_add_dynamic_entry (info
, (bfd_vma
) DT_FINI_ARRAYSZ
,
3212 dynstr
= bfd_get_section_by_name (dynobj
, ".dynstr");
3213 /* If .dynstr is excluded from the link, we don't want any of
3214 these tags. Strictly, we should be checking each section
3215 individually; This quick check covers for the case where
3216 someone does a /DISCARD/ : { *(*) }. */
3217 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
3219 bfd_size_type strsize
;
3221 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
3222 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_HASH
, (bfd_vma
) 0)
3223 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_STRTAB
, (bfd_vma
) 0)
3224 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SYMTAB
, (bfd_vma
) 0)
3225 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_STRSZ
, strsize
)
3226 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_SYMENT
,
3227 (bfd_vma
) sizeof (Elf_External_Sym
)))
3232 /* The backend must work out the sizes of all the other dynamic
3234 if (bed
->elf_backend_size_dynamic_sections
3235 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
3238 if (elf_hash_table (info
)->dynamic_sections_created
)
3240 bfd_size_type dynsymcount
;
3242 size_t bucketcount
= 0;
3243 size_t hash_entry_size
;
3244 unsigned int dtagcount
;
3246 /* Set up the version definition section. */
3247 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
3248 BFD_ASSERT (s
!= NULL
);
3250 /* We may have created additional version definitions if we are
3251 just linking a regular application. */
3252 verdefs
= asvinfo
.verdefs
;
3254 /* Skip anonymous version tag. */
3255 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
3256 verdefs
= verdefs
->next
;
3258 if (verdefs
== NULL
)
3259 _bfd_strip_section_from_output (info
, s
);
3264 struct bfd_elf_version_tree
*t
;
3266 Elf_Internal_Verdef def
;
3267 Elf_Internal_Verdaux defaux
;
3272 /* Make space for the base version. */
3273 size
+= sizeof (Elf_External_Verdef
);
3274 size
+= sizeof (Elf_External_Verdaux
);
3277 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3279 struct bfd_elf_version_deps
*n
;
3281 size
+= sizeof (Elf_External_Verdef
);
3282 size
+= sizeof (Elf_External_Verdaux
);
3285 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3286 size
+= sizeof (Elf_External_Verdaux
);
3289 s
->_raw_size
= size
;
3290 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3291 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
3294 /* Fill in the version definition section. */
3298 def
.vd_version
= VER_DEF_CURRENT
;
3299 def
.vd_flags
= VER_FLG_BASE
;
3302 def
.vd_aux
= sizeof (Elf_External_Verdef
);
3303 def
.vd_next
= (sizeof (Elf_External_Verdef
)
3304 + sizeof (Elf_External_Verdaux
));
3306 if (soname_indx
!= (bfd_size_type
) -1)
3308 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
3310 def
.vd_hash
= bfd_elf_hash (soname
);
3311 defaux
.vda_name
= soname_indx
;
3318 name
= basename (output_bfd
->filename
);
3319 def
.vd_hash
= bfd_elf_hash (name
);
3320 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3322 if (indx
== (bfd_size_type
) -1)
3324 defaux
.vda_name
= indx
;
3326 defaux
.vda_next
= 0;
3328 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
3329 (Elf_External_Verdef
*) p
);
3330 p
+= sizeof (Elf_External_Verdef
);
3331 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3332 (Elf_External_Verdaux
*) p
);
3333 p
+= sizeof (Elf_External_Verdaux
);
3335 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3338 struct bfd_elf_version_deps
*n
;
3339 struct elf_link_hash_entry
*h
;
3340 struct bfd_link_hash_entry
*bh
;
3343 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3346 /* Add a symbol representing this version. */
3348 if (! (_bfd_generic_link_add_one_symbol
3349 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
3350 (bfd_vma
) 0, (const char *) NULL
, false,
3351 get_elf_backend_data (dynobj
)->collect
, &bh
)))
3353 h
= (struct elf_link_hash_entry
*) bh
;
3354 h
->elf_link_hash_flags
&= ~ ELF_LINK_NON_ELF
;
3355 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3356 h
->type
= STT_OBJECT
;
3357 h
->verinfo
.vertree
= t
;
3359 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
3362 def
.vd_version
= VER_DEF_CURRENT
;
3364 if (t
->globals
== NULL
&& t
->locals
== NULL
&& ! t
->used
)
3365 def
.vd_flags
|= VER_FLG_WEAK
;
3366 def
.vd_ndx
= t
->vernum
+ 1;
3367 def
.vd_cnt
= cdeps
+ 1;
3368 def
.vd_hash
= bfd_elf_hash (t
->name
);
3369 def
.vd_aux
= sizeof (Elf_External_Verdef
);
3370 if (t
->next
!= NULL
)
3371 def
.vd_next
= (sizeof (Elf_External_Verdef
)
3372 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
3376 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
3377 (Elf_External_Verdef
*) p
);
3378 p
+= sizeof (Elf_External_Verdef
);
3380 defaux
.vda_name
= h
->dynstr_index
;
3381 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
3383 if (t
->deps
== NULL
)
3384 defaux
.vda_next
= 0;
3386 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
3387 t
->name_indx
= defaux
.vda_name
;
3389 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3390 (Elf_External_Verdaux
*) p
);
3391 p
+= sizeof (Elf_External_Verdaux
);
3393 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3395 if (n
->version_needed
== NULL
)
3397 /* This can happen if there was an error in the
3399 defaux
.vda_name
= 0;
3403 defaux
.vda_name
= n
->version_needed
->name_indx
;
3404 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
3407 if (n
->next
== NULL
)
3408 defaux
.vda_next
= 0;
3410 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
3412 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3413 (Elf_External_Verdaux
*) p
);
3414 p
+= sizeof (Elf_External_Verdaux
);
3418 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERDEF
, (bfd_vma
) 0)
3419 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERDEFNUM
,
3423 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
3426 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
3428 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FLAGS
, info
->flags
))
3435 info
->flags_1
&= ~ (DF_1_INITFIRST
3438 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_FLAGS_1
,
3443 /* Work out the size of the version reference section. */
3445 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
3446 BFD_ASSERT (s
!= NULL
);
3448 struct elf_find_verdep_info sinfo
;
3450 sinfo
.output_bfd
= output_bfd
;
3452 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
3453 if (sinfo
.vers
== 0)
3455 sinfo
.failed
= false;
3457 elf_link_hash_traverse (elf_hash_table (info
),
3458 elf_link_find_version_dependencies
,
3461 if (elf_tdata (output_bfd
)->verref
== NULL
)
3462 _bfd_strip_section_from_output (info
, s
);
3465 Elf_Internal_Verneed
*t
;
3470 /* Build the version definition section. */
3473 for (t
= elf_tdata (output_bfd
)->verref
;
3477 Elf_Internal_Vernaux
*a
;
3479 size
+= sizeof (Elf_External_Verneed
);
3481 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3482 size
+= sizeof (Elf_External_Vernaux
);
3485 s
->_raw_size
= size
;
3486 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3487 if (s
->contents
== NULL
)
3491 for (t
= elf_tdata (output_bfd
)->verref
;
3496 Elf_Internal_Vernaux
*a
;
3500 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3503 t
->vn_version
= VER_NEED_CURRENT
;
3505 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3506 elf_dt_name (t
->vn_bfd
) != NULL
3507 ? elf_dt_name (t
->vn_bfd
)
3508 : basename (t
->vn_bfd
->filename
),
3510 if (indx
== (bfd_size_type
) -1)
3513 t
->vn_aux
= sizeof (Elf_External_Verneed
);
3514 if (t
->vn_nextref
== NULL
)
3517 t
->vn_next
= (sizeof (Elf_External_Verneed
)
3518 + caux
* sizeof (Elf_External_Vernaux
));
3520 _bfd_elf_swap_verneed_out (output_bfd
, t
,
3521 (Elf_External_Verneed
*) p
);
3522 p
+= sizeof (Elf_External_Verneed
);
3524 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3526 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
3527 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
3528 a
->vna_nodename
, false);
3529 if (indx
== (bfd_size_type
) -1)
3532 if (a
->vna_nextptr
== NULL
)
3535 a
->vna_next
= sizeof (Elf_External_Vernaux
);
3537 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
3538 (Elf_External_Vernaux
*) p
);
3539 p
+= sizeof (Elf_External_Vernaux
);
3543 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERNEED
,
3545 || ! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERNEEDNUM
,
3549 elf_tdata (output_bfd
)->cverrefs
= crefs
;
3553 /* Assign dynsym indicies. In a shared library we generate a
3554 section symbol for each output section, which come first.
3555 Next come all of the back-end allocated local dynamic syms,
3556 followed by the rest of the global symbols. */
3558 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
3560 /* Work out the size of the symbol version section. */
3561 s
= bfd_get_section_by_name (dynobj
, ".gnu.version");
3562 BFD_ASSERT (s
!= NULL
);
3563 if (dynsymcount
== 0
3564 || (verdefs
== NULL
&& elf_tdata (output_bfd
)->verref
== NULL
))
3566 _bfd_strip_section_from_output (info
, s
);
3567 /* The DYNSYMCOUNT might have changed if we were going to
3568 output a dynamic symbol table entry for S. */
3569 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
3573 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Versym
);
3574 s
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, s
->_raw_size
);
3575 if (s
->contents
== NULL
)
3578 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_VERSYM
, (bfd_vma
) 0))
3582 /* Set the size of the .dynsym and .hash sections. We counted
3583 the number of dynamic symbols in elf_link_add_object_symbols.
3584 We will build the contents of .dynsym and .hash when we build
3585 the final symbol table, because until then we do not know the
3586 correct value to give the symbols. We built the .dynstr
3587 section as we went along in elf_link_add_object_symbols. */
3588 s
= bfd_get_section_by_name (dynobj
, ".dynsym");
3589 BFD_ASSERT (s
!= NULL
);
3590 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Sym
);
3591 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3592 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
3595 if (dynsymcount
!= 0)
3597 Elf_Internal_Sym isym
;
3599 /* The first entry in .dynsym is a dummy symbol. */
3606 elf_swap_symbol_out (output_bfd
, &isym
, (PTR
) s
->contents
, (PTR
) 0);
3609 /* Compute the size of the hashing table. As a side effect this
3610 computes the hash values for all the names we export. */
3611 bucketcount
= compute_bucket_count (info
);
3613 s
= bfd_get_section_by_name (dynobj
, ".hash");
3614 BFD_ASSERT (s
!= NULL
);
3615 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
3616 s
->_raw_size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
3617 s
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, s
->_raw_size
);
3618 if (s
->contents
== NULL
)
3621 bfd_put (8 * hash_entry_size
, output_bfd
, (bfd_vma
) bucketcount
,
3623 bfd_put (8 * hash_entry_size
, output_bfd
, (bfd_vma
) dynsymcount
,
3624 s
->contents
+ hash_entry_size
);
3626 elf_hash_table (info
)->bucketcount
= bucketcount
;
3628 s
= bfd_get_section_by_name (dynobj
, ".dynstr");
3629 BFD_ASSERT (s
!= NULL
);
3631 elf_finalize_dynstr (output_bfd
, info
);
3633 s
->_raw_size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
3635 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
3636 if (! elf_add_dynamic_entry (info
, (bfd_vma
) DT_NULL
, (bfd_vma
) 0))
3643 /* This function is used to adjust offsets into .dynstr for
3644 dynamic symbols. This is called via elf_link_hash_traverse. */
3646 static boolean elf_adjust_dynstr_offsets
3647 PARAMS ((struct elf_link_hash_entry
*, PTR
));
3650 elf_adjust_dynstr_offsets (h
, data
)
3651 struct elf_link_hash_entry
*h
;
3654 struct elf_strtab_hash
*dynstr
= (struct elf_strtab_hash
*) data
;
3656 if (h
->root
.type
== bfd_link_hash_warning
)
3657 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3659 if (h
->dynindx
!= -1)
3660 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
3664 /* Assign string offsets in .dynstr, update all structures referencing
3668 elf_finalize_dynstr (output_bfd
, info
)
3670 struct bfd_link_info
*info
;
3672 struct elf_link_local_dynamic_entry
*entry
;
3673 struct elf_strtab_hash
*dynstr
= elf_hash_table (info
)->dynstr
;
3674 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
3677 Elf_External_Dyn
*dyncon
, *dynconend
;
3679 _bfd_elf_strtab_finalize (dynstr
);
3680 size
= _bfd_elf_strtab_size (dynstr
);
3682 /* Update all .dynamic entries referencing .dynstr strings. */
3683 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3684 BFD_ASSERT (sdyn
!= NULL
);
3686 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
3687 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
3689 for (; dyncon
< dynconend
; dyncon
++)
3691 Elf_Internal_Dyn dyn
;
3693 elf_swap_dyn_in (dynobj
, dyncon
, & dyn
);
3697 dyn
.d_un
.d_val
= size
;
3698 elf_swap_dyn_out (dynobj
, & dyn
, dyncon
);
3706 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
3707 elf_swap_dyn_out (dynobj
, & dyn
, dyncon
);
3714 /* Now update local dynamic symbols. */
3715 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
3716 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
3717 entry
->isym
.st_name
);
3719 /* And the rest of dynamic symbols. */
3720 elf_link_hash_traverse (elf_hash_table (info
),
3721 elf_adjust_dynstr_offsets
, dynstr
);
3723 /* Adjust version definitions. */
3724 if (elf_tdata (output_bfd
)->cverdefs
)
3729 Elf_Internal_Verdef def
;
3730 Elf_Internal_Verdaux defaux
;
3732 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
3733 p
= (bfd_byte
*) s
->contents
;
3736 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
3738 p
+= sizeof (Elf_External_Verdef
);
3739 for (i
= 0; i
< def
.vd_cnt
; ++i
)
3741 _bfd_elf_swap_verdaux_in (output_bfd
,
3742 (Elf_External_Verdaux
*) p
, &defaux
);
3743 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
3745 _bfd_elf_swap_verdaux_out (output_bfd
,
3746 &defaux
, (Elf_External_Verdaux
*) p
);
3747 p
+= sizeof (Elf_External_Verdaux
);
3750 while (def
.vd_next
);
3753 /* Adjust version references. */
3754 if (elf_tdata (output_bfd
)->verref
)
3759 Elf_Internal_Verneed need
;
3760 Elf_Internal_Vernaux needaux
;
3762 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
3763 p
= (bfd_byte
*) s
->contents
;
3766 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
3768 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
3769 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
3770 (Elf_External_Verneed
*) p
);
3771 p
+= sizeof (Elf_External_Verneed
);
3772 for (i
= 0; i
< need
.vn_cnt
; ++i
)
3774 _bfd_elf_swap_vernaux_in (output_bfd
,
3775 (Elf_External_Vernaux
*) p
, &needaux
);
3776 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
3778 _bfd_elf_swap_vernaux_out (output_bfd
,
3780 (Elf_External_Vernaux
*) p
);
3781 p
+= sizeof (Elf_External_Vernaux
);
3784 while (need
.vn_next
);
3790 /* Fix up the flags for a symbol. This handles various cases which
3791 can only be fixed after all the input files are seen. This is
3792 currently called by both adjust_dynamic_symbol and
3793 assign_sym_version, which is unnecessary but perhaps more robust in
3794 the face of future changes. */
3797 elf_fix_symbol_flags (h
, eif
)
3798 struct elf_link_hash_entry
*h
;
3799 struct elf_info_failed
*eif
;
3801 /* If this symbol was mentioned in a non-ELF file, try to set
3802 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
3803 permit a non-ELF file to correctly refer to a symbol defined in
3804 an ELF dynamic object. */
3805 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_ELF
) != 0)
3807 while (h
->root
.type
== bfd_link_hash_indirect
)
3808 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3810 if (h
->root
.type
!= bfd_link_hash_defined
3811 && h
->root
.type
!= bfd_link_hash_defweak
)
3812 h
->elf_link_hash_flags
|= (ELF_LINK_HASH_REF_REGULAR
3813 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
);
3816 if (h
->root
.u
.def
.section
->owner
!= NULL
3817 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
3818 == bfd_target_elf_flavour
))
3819 h
->elf_link_hash_flags
|= (ELF_LINK_HASH_REF_REGULAR
3820 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
);
3822 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3825 if (h
->dynindx
== -1
3826 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
3827 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0))
3829 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
3838 /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol
3839 was first seen in a non-ELF file. Fortunately, if the symbol
3840 was first seen in an ELF file, we're probably OK unless the
3841 symbol was defined in a non-ELF file. Catch that case here.
3842 FIXME: We're still in trouble if the symbol was first seen in
3843 a dynamic object, and then later in a non-ELF regular object. */
3844 if ((h
->root
.type
== bfd_link_hash_defined
3845 || h
->root
.type
== bfd_link_hash_defweak
)
3846 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
3847 && (h
->root
.u
.def
.section
->owner
!= NULL
3848 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
3849 != bfd_target_elf_flavour
)
3850 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
3851 && (h
->elf_link_hash_flags
3852 & ELF_LINK_HASH_DEF_DYNAMIC
) == 0)))
3853 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3856 /* If this is a final link, and the symbol was defined as a common
3857 symbol in a regular object file, and there was no definition in
3858 any dynamic object, then the linker will have allocated space for
3859 the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR
3860 flag will not have been set. */
3861 if (h
->root
.type
== bfd_link_hash_defined
3862 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
3863 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
3864 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3865 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
3866 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3868 /* If -Bsymbolic was used (which means to bind references to global
3869 symbols to the definition within the shared object), and this
3870 symbol was defined in a regular object, then it actually doesn't
3871 need a PLT entry, and we can accomplish that by forcing it local.
3872 Likewise, if the symbol has hidden or internal visibility.
3873 FIXME: It might be that we also do not need a PLT for other
3874 non-hidden visibilities, but we would have to tell that to the
3875 backend specifically; we can't just clear PLT-related data here. */
3876 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0
3877 && eif
->info
->shared
3878 && is_elf_hash_table (eif
->info
)
3879 && (eif
->info
->symbolic
3880 || ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
3881 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
)
3882 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3884 struct elf_backend_data
*bed
;
3885 boolean force_local
;
3887 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
3889 force_local
= (ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
3890 || ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
);
3891 (*bed
->elf_backend_hide_symbol
) (eif
->info
, h
, force_local
);
3894 /* If this is a weak defined symbol in a dynamic object, and we know
3895 the real definition in the dynamic object, copy interesting flags
3896 over to the real definition. */
3897 if (h
->weakdef
!= NULL
)
3899 struct elf_link_hash_entry
*weakdef
;
3901 weakdef
= h
->weakdef
;
3902 if (h
->root
.type
== bfd_link_hash_indirect
)
3903 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3905 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3906 || h
->root
.type
== bfd_link_hash_defweak
);
3907 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
3908 || weakdef
->root
.type
== bfd_link_hash_defweak
);
3909 BFD_ASSERT (weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
);
3911 /* If the real definition is defined by a regular object file,
3912 don't do anything special. See the longer description in
3913 elf_adjust_dynamic_symbol, below. */
3914 if ((weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3918 struct elf_backend_data
*bed
;
3920 bed
= get_elf_backend_data (elf_hash_table (eif
->info
)->dynobj
);
3921 (*bed
->elf_backend_copy_indirect_symbol
) (bed
, weakdef
, h
);
3928 /* Make the backend pick a good value for a dynamic symbol. This is
3929 called via elf_link_hash_traverse, and also calls itself
3933 elf_adjust_dynamic_symbol (h
, data
)
3934 struct elf_link_hash_entry
*h
;
3937 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
3939 struct elf_backend_data
*bed
;
3941 if (h
->root
.type
== bfd_link_hash_warning
)
3943 h
->plt
.offset
= (bfd_vma
) -1;
3944 h
->got
.offset
= (bfd_vma
) -1;
3946 /* When warning symbols are created, they **replace** the "real"
3947 entry in the hash table, thus we never get to see the real
3948 symbol in a hash traversal. So look at it now. */
3949 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3952 /* Ignore indirect symbols. These are added by the versioning code. */
3953 if (h
->root
.type
== bfd_link_hash_indirect
)
3956 if (! is_elf_hash_table (eif
->info
))
3959 /* Fix the symbol flags. */
3960 if (! elf_fix_symbol_flags (h
, eif
))
3963 /* If this symbol does not require a PLT entry, and it is not
3964 defined by a dynamic object, or is not referenced by a regular
3965 object, ignore it. We do have to handle a weak defined symbol,
3966 even if no regular object refers to it, if we decided to add it
3967 to the dynamic symbol table. FIXME: Do we normally need to worry
3968 about symbols which are defined by one dynamic object and
3969 referenced by another one? */
3970 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) == 0
3971 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
3972 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3973 || ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0
3974 && (h
->weakdef
== NULL
|| h
->weakdef
->dynindx
== -1))))
3976 h
->plt
.offset
= (bfd_vma
) -1;
3980 /* If we've already adjusted this symbol, don't do it again. This
3981 can happen via a recursive call. */
3982 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DYNAMIC_ADJUSTED
) != 0)
3985 /* Don't look at this symbol again. Note that we must set this
3986 after checking the above conditions, because we may look at a
3987 symbol once, decide not to do anything, and then get called
3988 recursively later after REF_REGULAR is set below. */
3989 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DYNAMIC_ADJUSTED
;
3991 /* If this is a weak definition, and we know a real definition, and
3992 the real symbol is not itself defined by a regular object file,
3993 then get a good value for the real definition. We handle the
3994 real symbol first, for the convenience of the backend routine.
3996 Note that there is a confusing case here. If the real definition
3997 is defined by a regular object file, we don't get the real symbol
3998 from the dynamic object, but we do get the weak symbol. If the
3999 processor backend uses a COPY reloc, then if some routine in the
4000 dynamic object changes the real symbol, we will not see that
4001 change in the corresponding weak symbol. This is the way other
4002 ELF linkers work as well, and seems to be a result of the shared
4005 I will clarify this issue. Most SVR4 shared libraries define the
4006 variable _timezone and define timezone as a weak synonym. The
4007 tzset call changes _timezone. If you write
4008 extern int timezone;
4010 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
4011 you might expect that, since timezone is a synonym for _timezone,
4012 the same number will print both times. However, if the processor
4013 backend uses a COPY reloc, then actually timezone will be copied
4014 into your process image, and, since you define _timezone
4015 yourself, _timezone will not. Thus timezone and _timezone will
4016 wind up at different memory locations. The tzset call will set
4017 _timezone, leaving timezone unchanged. */
4019 if (h
->weakdef
!= NULL
)
4021 /* If we get to this point, we know there is an implicit
4022 reference by a regular object file via the weak symbol H.
4023 FIXME: Is this really true? What if the traversal finds
4024 H->WEAKDEF before it finds H? */
4025 h
->weakdef
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
4027 if (! elf_adjust_dynamic_symbol (h
->weakdef
, (PTR
) eif
))
4031 /* If a symbol has no type and no size and does not require a PLT
4032 entry, then we are probably about to do the wrong thing here: we
4033 are probably going to create a COPY reloc for an empty object.
4034 This case can arise when a shared object is built with assembly
4035 code, and the assembly code fails to set the symbol type. */
4037 && h
->type
== STT_NOTYPE
4038 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) == 0)
4039 (*_bfd_error_handler
)
4040 (_("warning: type and size of dynamic symbol `%s' are not defined"),
4041 h
->root
.root
.string
);
4043 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
4044 bed
= get_elf_backend_data (dynobj
);
4045 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
4054 /* This routine is used to export all defined symbols into the dynamic
4055 symbol table. It is called via elf_link_hash_traverse. */
4058 elf_export_symbol (h
, data
)
4059 struct elf_link_hash_entry
*h
;
4062 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
4064 /* Ignore indirect symbols. These are added by the versioning code. */
4065 if (h
->root
.type
== bfd_link_hash_indirect
)
4068 if (h
->root
.type
== bfd_link_hash_warning
)
4069 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4071 if (h
->dynindx
== -1
4072 && (h
->elf_link_hash_flags
4073 & (ELF_LINK_HASH_DEF_REGULAR
| ELF_LINK_HASH_REF_REGULAR
)) != 0)
4075 struct bfd_elf_version_tree
*t
;
4076 struct bfd_elf_version_expr
*d
;
4078 for (t
= eif
->verdefs
; t
!= NULL
; t
= t
->next
)
4080 if (t
->globals
!= NULL
)
4082 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
4084 if ((*d
->match
) (d
, h
->root
.root
.string
))
4089 if (t
->locals
!= NULL
)
4091 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
4093 if ((*d
->match
) (d
, h
->root
.root
.string
))
4102 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
4113 /* Look through the symbols which are defined in other shared
4114 libraries and referenced here. Update the list of version
4115 dependencies. This will be put into the .gnu.version_r section.
4116 This function is called via elf_link_hash_traverse. */
4119 elf_link_find_version_dependencies (h
, data
)
4120 struct elf_link_hash_entry
*h
;
4123 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
4124 Elf_Internal_Verneed
*t
;
4125 Elf_Internal_Vernaux
*a
;
4128 if (h
->root
.type
== bfd_link_hash_warning
)
4129 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4131 /* We only care about symbols defined in shared objects with version
4133 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
4134 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
4136 || h
->verinfo
.verdef
== NULL
)
4139 /* See if we already know about this version. */
4140 for (t
= elf_tdata (rinfo
->output_bfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
4142 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
4145 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
4146 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
4152 /* This is a new version. Add it to tree we are building. */
4157 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->output_bfd
, amt
);
4160 rinfo
->failed
= true;
4164 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
4165 t
->vn_nextref
= elf_tdata (rinfo
->output_bfd
)->verref
;
4166 elf_tdata (rinfo
->output_bfd
)->verref
= t
;
4170 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->output_bfd
, amt
);
4172 /* Note that we are copying a string pointer here, and testing it
4173 above. If bfd_elf_string_from_elf_section is ever changed to
4174 discard the string data when low in memory, this will have to be
4176 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
4178 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
4179 a
->vna_nextptr
= t
->vn_auxptr
;
4181 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
4184 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
4191 /* Figure out appropriate versions for all the symbols. We may not
4192 have the version number script until we have read all of the input
4193 files, so until that point we don't know which symbols should be
4194 local. This function is called via elf_link_hash_traverse. */
4197 elf_link_assign_sym_version (h
, data
)
4198 struct elf_link_hash_entry
*h
;
4201 struct elf_assign_sym_version_info
*sinfo
;
4202 struct bfd_link_info
*info
;
4203 struct elf_backend_data
*bed
;
4204 struct elf_info_failed eif
;
4208 sinfo
= (struct elf_assign_sym_version_info
*) data
;
4211 if (h
->root
.type
== bfd_link_hash_warning
)
4212 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4214 /* Fix the symbol flags. */
4217 if (! elf_fix_symbol_flags (h
, &eif
))
4220 sinfo
->failed
= true;
4224 /* We only need version numbers for symbols defined in regular
4226 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
4229 bed
= get_elf_backend_data (sinfo
->output_bfd
);
4230 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
4231 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
4233 struct bfd_elf_version_tree
*t
;
4238 /* There are two consecutive ELF_VER_CHR characters if this is
4239 not a hidden symbol. */
4241 if (*p
== ELF_VER_CHR
)
4247 /* If there is no version string, we can just return out. */
4251 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
4255 /* Look for the version. If we find it, it is no longer weak. */
4256 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
4258 if (strcmp (t
->name
, p
) == 0)
4262 struct bfd_elf_version_expr
*d
;
4264 len
= p
- h
->root
.root
.string
;
4265 alc
= bfd_malloc ((bfd_size_type
) len
);
4268 memcpy (alc
, h
->root
.root
.string
, len
- 1);
4269 alc
[len
- 1] = '\0';
4270 if (alc
[len
- 2] == ELF_VER_CHR
)
4271 alc
[len
- 2] = '\0';
4273 h
->verinfo
.vertree
= t
;
4277 if (t
->globals
!= NULL
)
4279 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
4280 if ((*d
->match
) (d
, alc
))
4284 /* See if there is anything to force this symbol to
4286 if (d
== NULL
&& t
->locals
!= NULL
)
4288 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
4290 if ((*d
->match
) (d
, alc
))
4292 if (h
->dynindx
!= -1
4294 && ! info
->export_dynamic
)
4296 (*bed
->elf_backend_hide_symbol
) (info
, h
, true);
4309 /* If we are building an application, we need to create a
4310 version node for this version. */
4311 if (t
== NULL
&& ! info
->shared
)
4313 struct bfd_elf_version_tree
**pp
;
4316 /* If we aren't going to export this symbol, we don't need
4317 to worry about it. */
4318 if (h
->dynindx
== -1)
4322 t
= ((struct bfd_elf_version_tree
*)
4323 bfd_alloc (sinfo
->output_bfd
, amt
));
4326 sinfo
->failed
= true;
4335 t
->name_indx
= (unsigned int) -1;
4339 /* Don't count anonymous version tag. */
4340 if (sinfo
->verdefs
!= NULL
&& sinfo
->verdefs
->vernum
== 0)
4342 for (pp
= &sinfo
->verdefs
; *pp
!= NULL
; pp
= &(*pp
)->next
)
4344 t
->vernum
= version_index
;
4348 h
->verinfo
.vertree
= t
;
4352 /* We could not find the version for a symbol when
4353 generating a shared archive. Return an error. */
4354 (*_bfd_error_handler
)
4355 (_("%s: undefined versioned symbol name %s"),
4356 bfd_get_filename (sinfo
->output_bfd
), h
->root
.root
.string
);
4357 bfd_set_error (bfd_error_bad_value
);
4358 sinfo
->failed
= true;
4363 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
4366 /* If we don't have a version for this symbol, see if we can find
4368 if (h
->verinfo
.vertree
== NULL
&& sinfo
->verdefs
!= NULL
)
4370 struct bfd_elf_version_tree
*t
;
4371 struct bfd_elf_version_tree
*local_ver
;
4372 struct bfd_elf_version_expr
*d
;
4374 /* See if can find what version this symbol is in. If the
4375 symbol is supposed to be local, then don't actually register
4378 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
4380 if (t
->globals
!= NULL
)
4385 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
4387 if ((*d
->match
) (d
, h
->root
.root
.string
))
4393 /* There is a version without definition. Make
4394 the symbol the default definition for this
4396 h
->verinfo
.vertree
= t
;
4407 /* There is no undefined version for this symbol. Hide the
4409 (*bed
->elf_backend_hide_symbol
) (info
, h
, true);
4412 if (t
->locals
!= NULL
)
4414 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
4416 /* If the match is "*", keep looking for a more
4417 explicit, perhaps even global, match. */
4418 if (d
->pattern
[0] == '*' && d
->pattern
[1] == '\0')
4420 else if ((*d
->match
) (d
, h
->root
.root
.string
))
4432 if (local_ver
!= NULL
)
4434 h
->verinfo
.vertree
= local_ver
;
4435 if (h
->dynindx
!= -1
4437 && ! info
->export_dynamic
)
4439 (*bed
->elf_backend_hide_symbol
) (info
, h
, true);
4447 /* Final phase of ELF linker. */
4449 /* A structure we use to avoid passing large numbers of arguments. */
4451 struct elf_final_link_info
4453 /* General link information. */
4454 struct bfd_link_info
*info
;
4457 /* Symbol string table. */
4458 struct bfd_strtab_hash
*symstrtab
;
4459 /* .dynsym section. */
4460 asection
*dynsym_sec
;
4461 /* .hash section. */
4463 /* symbol version section (.gnu.version). */
4464 asection
*symver_sec
;
4465 /* first SHF_TLS section (if any). */
4466 asection
*first_tls_sec
;
4467 /* Buffer large enough to hold contents of any section. */
4469 /* Buffer large enough to hold external relocs of any section. */
4470 PTR external_relocs
;
4471 /* Buffer large enough to hold internal relocs of any section. */
4472 Elf_Internal_Rela
*internal_relocs
;
4473 /* Buffer large enough to hold external local symbols of any input
4475 Elf_External_Sym
*external_syms
;
4476 /* And a buffer for symbol section indices. */
4477 Elf_External_Sym_Shndx
*locsym_shndx
;
4478 /* Buffer large enough to hold internal local symbols of any input
4480 Elf_Internal_Sym
*internal_syms
;
4481 /* Array large enough to hold a symbol index for each local symbol
4482 of any input BFD. */
4484 /* Array large enough to hold a section pointer for each local
4485 symbol of any input BFD. */
4486 asection
**sections
;
4487 /* Buffer to hold swapped out symbols. */
4488 Elf_External_Sym
*symbuf
;
4489 /* And one for symbol section indices. */
4490 Elf_External_Sym_Shndx
*symshndxbuf
;
4491 /* Number of swapped out symbols in buffer. */
4492 size_t symbuf_count
;
4493 /* Number of symbols which fit in symbuf. */
4495 /* And same for symshndxbuf. */
4496 size_t shndxbuf_size
;
4499 static boolean elf_link_output_sym
4500 PARAMS ((struct elf_final_link_info
*, const char *,
4501 Elf_Internal_Sym
*, asection
*));
4502 static boolean elf_link_flush_output_syms
4503 PARAMS ((struct elf_final_link_info
*));
4504 static boolean elf_link_output_extsym
4505 PARAMS ((struct elf_link_hash_entry
*, PTR
));
4506 static boolean elf_link_sec_merge_syms
4507 PARAMS ((struct elf_link_hash_entry
*, PTR
));
4508 static boolean elf_link_check_versioned_symbol
4509 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
4510 static boolean elf_link_input_bfd
4511 PARAMS ((struct elf_final_link_info
*, bfd
*));
4512 static boolean elf_reloc_link_order
4513 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
4514 struct bfd_link_order
*));
4516 /* This struct is used to pass information to elf_link_output_extsym. */
4518 struct elf_outext_info
4522 struct elf_final_link_info
*finfo
;
4525 /* Compute the size of, and allocate space for, REL_HDR which is the
4526 section header for a section containing relocations for O. */
4529 elf_link_size_reloc_section (abfd
, rel_hdr
, o
)
4531 Elf_Internal_Shdr
*rel_hdr
;
4534 bfd_size_type reloc_count
;
4535 bfd_size_type num_rel_hashes
;
4537 /* Figure out how many relocations there will be. */
4538 if (rel_hdr
== &elf_section_data (o
)->rel_hdr
)
4539 reloc_count
= elf_section_data (o
)->rel_count
;
4541 reloc_count
= elf_section_data (o
)->rel_count2
;
4543 num_rel_hashes
= o
->reloc_count
;
4544 if (num_rel_hashes
< reloc_count
)
4545 num_rel_hashes
= reloc_count
;
4547 /* That allows us to calculate the size of the section. */
4548 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reloc_count
;
4550 /* The contents field must last into write_object_contents, so we
4551 allocate it with bfd_alloc rather than malloc. Also since we
4552 cannot be sure that the contents will actually be filled in,
4553 we zero the allocated space. */
4554 rel_hdr
->contents
= (PTR
) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
4555 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
4558 /* We only allocate one set of hash entries, so we only do it the
4559 first time we are called. */
4560 if (elf_section_data (o
)->rel_hashes
== NULL
4563 struct elf_link_hash_entry
**p
;
4565 p
= ((struct elf_link_hash_entry
**)
4566 bfd_zmalloc (num_rel_hashes
4567 * sizeof (struct elf_link_hash_entry
*)));
4571 elf_section_data (o
)->rel_hashes
= p
;
4577 /* When performing a relocateable link, the input relocations are
4578 preserved. But, if they reference global symbols, the indices
4579 referenced must be updated. Update all the relocations in
4580 REL_HDR (there are COUNT of them), using the data in REL_HASH. */
4583 elf_link_adjust_relocs (abfd
, rel_hdr
, count
, rel_hash
)
4585 Elf_Internal_Shdr
*rel_hdr
;
4587 struct elf_link_hash_entry
**rel_hash
;
4590 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4591 Elf_Internal_Rel
*irel
;
4592 Elf_Internal_Rela
*irela
;
4593 bfd_size_type amt
= sizeof (Elf_Internal_Rel
) * bed
->s
->int_rels_per_ext_rel
;
4595 irel
= (Elf_Internal_Rel
*) bfd_zmalloc (amt
);
4598 (*_bfd_error_handler
) (_("Error: out of memory"));
4602 amt
= sizeof (Elf_Internal_Rela
) * bed
->s
->int_rels_per_ext_rel
;
4603 irela
= (Elf_Internal_Rela
*) bfd_zmalloc (amt
);
4606 (*_bfd_error_handler
) (_("Error: out of memory"));
4610 for (i
= 0; i
< count
; i
++, rel_hash
++)
4612 if (*rel_hash
== NULL
)
4615 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
4617 if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
4619 Elf_External_Rel
*erel
;
4622 erel
= (Elf_External_Rel
*) rel_hdr
->contents
+ i
;
4623 if (bed
->s
->swap_reloc_in
)
4624 (*bed
->s
->swap_reloc_in
) (abfd
, (bfd_byte
*) erel
, irel
);
4626 elf_swap_reloc_in (abfd
, erel
, irel
);
4628 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
4629 irel
[j
].r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
4630 ELF_R_TYPE (irel
[j
].r_info
));
4632 if (bed
->s
->swap_reloc_out
)
4633 (*bed
->s
->swap_reloc_out
) (abfd
, irel
, (bfd_byte
*) erel
);
4635 elf_swap_reloc_out (abfd
, irel
, erel
);
4639 Elf_External_Rela
*erela
;
4642 BFD_ASSERT (rel_hdr
->sh_entsize
4643 == sizeof (Elf_External_Rela
));
4645 erela
= (Elf_External_Rela
*) rel_hdr
->contents
+ i
;
4646 if (bed
->s
->swap_reloca_in
)
4647 (*bed
->s
->swap_reloca_in
) (abfd
, (bfd_byte
*) erela
, irela
);
4649 elf_swap_reloca_in (abfd
, erela
, irela
);
4651 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
4652 irela
[j
].r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
4653 ELF_R_TYPE (irela
[j
].r_info
));
4655 if (bed
->s
->swap_reloca_out
)
4656 (*bed
->s
->swap_reloca_out
) (abfd
, irela
, (bfd_byte
*) erela
);
4658 elf_swap_reloca_out (abfd
, irela
, erela
);
4666 struct elf_link_sort_rela
4669 enum elf_reloc_type_class type
;
4672 /* We use these as arrays of size int_rels_per_ext_rel. */
4673 Elf_Internal_Rel rel
[1];
4674 Elf_Internal_Rela rela
[1];
4679 elf_link_sort_cmp1 (A
, B
)
4683 struct elf_link_sort_rela
*a
= (struct elf_link_sort_rela
*) A
;
4684 struct elf_link_sort_rela
*b
= (struct elf_link_sort_rela
*) B
;
4685 int relativea
, relativeb
;
4687 relativea
= a
->type
== reloc_class_relative
;
4688 relativeb
= b
->type
== reloc_class_relative
;
4690 if (relativea
< relativeb
)
4692 if (relativea
> relativeb
)
4694 if (ELF_R_SYM (a
->u
.rel
->r_info
) < ELF_R_SYM (b
->u
.rel
->r_info
))
4696 if (ELF_R_SYM (a
->u
.rel
->r_info
) > ELF_R_SYM (b
->u
.rel
->r_info
))
4698 if (a
->u
.rel
->r_offset
< b
->u
.rel
->r_offset
)
4700 if (a
->u
.rel
->r_offset
> b
->u
.rel
->r_offset
)
4706 elf_link_sort_cmp2 (A
, B
)
4710 struct elf_link_sort_rela
*a
= (struct elf_link_sort_rela
*) A
;
4711 struct elf_link_sort_rela
*b
= (struct elf_link_sort_rela
*) B
;
4714 if (a
->offset
< b
->offset
)
4716 if (a
->offset
> b
->offset
)
4718 copya
= (a
->type
== reloc_class_copy
) * 2 + (a
->type
== reloc_class_plt
);
4719 copyb
= (b
->type
== reloc_class_copy
) * 2 + (b
->type
== reloc_class_plt
);
4724 if (a
->u
.rel
->r_offset
< b
->u
.rel
->r_offset
)
4726 if (a
->u
.rel
->r_offset
> b
->u
.rel
->r_offset
)
4732 elf_link_sort_relocs (abfd
, info
, psec
)
4734 struct bfd_link_info
*info
;
4737 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
4738 asection
*reldyn
, *o
;
4739 boolean rel
= false;
4740 bfd_size_type count
, size
;
4742 struct elf_link_sort_rela
*rela
;
4743 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4744 int i2e
= bed
->s
->int_rels_per_ext_rel
;
4746 reldyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
4747 if (reldyn
== NULL
|| reldyn
->_raw_size
== 0)
4749 reldyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
4750 if (reldyn
== NULL
|| reldyn
->_raw_size
== 0)
4753 count
= reldyn
->_raw_size
/ sizeof (Elf_External_Rel
);
4756 count
= reldyn
->_raw_size
/ sizeof (Elf_External_Rela
);
4759 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4760 if ((o
->flags
& (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
))
4761 == (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
)
4762 && o
->output_section
== reldyn
)
4763 size
+= o
->_raw_size
;
4765 if (size
!= reldyn
->_raw_size
)
4768 /* We waste some memory here when N = i2e is greater than 1, since
4769 we allocate space for N * sizeof (*rela) where sizeof (*rela) +
4770 (N - 1) * sizeof (Elf_Internal_Rel/Rela) would do. Also, we use
4771 rela[k] only when k is a multiple of N, and then we index the
4772 array within the union, such that rela[k].u.rel[i], i < N, is the
4773 (i+1)th internal relocation corresponding to the (k/N)th external
4774 relocation. This is done such that the relocation swap-in and
4775 swap-out functions can gen pointers to arrays of internal
4776 relocations that form a single external relocation.
4778 If C permitted arrays of structures with dynamic sizes, we could
4779 do better, but trying to avoid wasting space at the end of the
4780 chunk from rela[k] to rela[k+N-1] would require us to allocate a
4781 separate array of pointers and since most ports have N == 1, this
4782 would be more wasteful. */
4783 rela
= (struct elf_link_sort_rela
*) bfd_zmalloc
4784 (sizeof (*rela
) * count
* i2e
);
4787 (*info
->callbacks
->warning
)
4788 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0,
4793 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4794 if ((o
->flags
& (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
))
4795 == (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
)
4796 && o
->output_section
== reldyn
)
4800 Elf_External_Rel
*erel
, *erelend
;
4801 struct elf_link_sort_rela
*s
;
4803 erel
= (Elf_External_Rel
*) o
->contents
;
4804 erelend
= (Elf_External_Rel
*) (o
->contents
+ o
->_raw_size
);
4805 s
= rela
+ (o
->output_offset
/ sizeof (Elf_External_Rel
) * i2e
);
4806 for (; erel
< erelend
; erel
++, s
+= i2e
)
4808 if (bed
->s
->swap_reloc_in
)
4809 (*bed
->s
->swap_reloc_in
) (abfd
, (bfd_byte
*) erel
,
4812 elf_swap_reloc_in (abfd
, erel
, s
->u
.rel
);
4814 s
->type
= (*bed
->elf_backend_reloc_type_class
) (s
->u
.rela
);
4819 Elf_External_Rela
*erela
, *erelaend
;
4820 struct elf_link_sort_rela
*s
;
4822 erela
= (Elf_External_Rela
*) o
->contents
;
4823 erelaend
= (Elf_External_Rela
*) (o
->contents
+ o
->_raw_size
);
4824 s
= rela
+ (o
->output_offset
/ sizeof (Elf_External_Rela
) * i2e
);
4825 for (; erela
< erelaend
; erela
++, s
+= i2e
)
4827 if (bed
->s
->swap_reloca_in
)
4828 (*bed
->s
->swap_reloca_in
) (dynobj
, (bfd_byte
*) erela
,
4831 elf_swap_reloca_in (dynobj
, erela
, s
->u
.rela
);
4833 s
->type
= (*bed
->elf_backend_reloc_type_class
) (s
->u
.rela
);
4838 qsort (rela
, (size_t) count
, sizeof (*rela
) * i2e
, elf_link_sort_cmp1
);
4839 for (ret
= 0; ret
< count
* i2e
&& rela
[ret
].type
== reloc_class_relative
;
4842 for (i
= ret
, j
= ret
; i
< count
* i2e
; i
+= i2e
)
4844 if (ELF_R_SYM (rela
[i
].u
.rel
->r_info
)
4845 != ELF_R_SYM (rela
[j
].u
.rel
->r_info
))
4847 rela
[i
].offset
= rela
[j
].u
.rel
->r_offset
;
4850 qsort (rela
+ ret
, (size_t) count
- ret
,
4851 sizeof (*rela
) * i2e
, elf_link_sort_cmp2
);
4853 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4854 if ((o
->flags
& (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
))
4855 == (SEC_HAS_CONTENTS
|SEC_LINKER_CREATED
)
4856 && o
->output_section
== reldyn
)
4860 Elf_External_Rel
*erel
, *erelend
;
4861 struct elf_link_sort_rela
*s
;
4863 erel
= (Elf_External_Rel
*) o
->contents
;
4864 erelend
= (Elf_External_Rel
*) (o
->contents
+ o
->_raw_size
);
4865 s
= rela
+ (o
->output_offset
/ sizeof (Elf_External_Rel
) * i2e
);
4866 for (; erel
< erelend
; erel
++, s
+= i2e
)
4868 if (bed
->s
->swap_reloc_out
)
4869 (*bed
->s
->swap_reloc_out
) (abfd
, s
->u
.rel
,
4872 elf_swap_reloc_out (abfd
, s
->u
.rel
, erel
);
4877 Elf_External_Rela
*erela
, *erelaend
;
4878 struct elf_link_sort_rela
*s
;
4880 erela
= (Elf_External_Rela
*) o
->contents
;
4881 erelaend
= (Elf_External_Rela
*) (o
->contents
+ o
->_raw_size
);
4882 s
= rela
+ (o
->output_offset
/ sizeof (Elf_External_Rela
) * i2e
);
4883 for (; erela
< erelaend
; erela
++, s
+= i2e
)
4885 if (bed
->s
->swap_reloca_out
)
4886 (*bed
->s
->swap_reloca_out
) (dynobj
, s
->u
.rela
,
4887 (bfd_byte
*) erela
);
4889 elf_swap_reloca_out (dynobj
, s
->u
.rela
, erela
);
4899 /* Do the final step of an ELF link. */
4902 elf_bfd_final_link (abfd
, info
)
4904 struct bfd_link_info
*info
;
4907 boolean emit_relocs
;
4909 struct elf_final_link_info finfo
;
4910 register asection
*o
;
4911 register struct bfd_link_order
*p
;
4913 bfd_size_type max_contents_size
;
4914 bfd_size_type max_external_reloc_size
;
4915 bfd_size_type max_internal_reloc_count
;
4916 bfd_size_type max_sym_count
;
4917 bfd_size_type max_sym_shndx_count
;
4919 Elf_Internal_Sym elfsym
;
4921 Elf_Internal_Shdr
*symtab_hdr
;
4922 Elf_Internal_Shdr
*symtab_shndx_hdr
;
4923 Elf_Internal_Shdr
*symstrtab_hdr
;
4924 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4925 struct elf_outext_info eoinfo
;
4927 size_t relativecount
= 0;
4928 asection
*reldyn
= 0;
4931 if (! is_elf_hash_table (info
))
4935 abfd
->flags
|= DYNAMIC
;
4937 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
4938 dynobj
= elf_hash_table (info
)->dynobj
;
4940 emit_relocs
= (info
->relocateable
4941 || info
->emitrelocations
4942 || bed
->elf_backend_emit_relocs
);
4945 finfo
.output_bfd
= abfd
;
4946 finfo
.symstrtab
= elf_stringtab_init ();
4947 if (finfo
.symstrtab
== NULL
)
4952 finfo
.dynsym_sec
= NULL
;
4953 finfo
.hash_sec
= NULL
;
4954 finfo
.symver_sec
= NULL
;
4958 finfo
.dynsym_sec
= bfd_get_section_by_name (dynobj
, ".dynsym");
4959 finfo
.hash_sec
= bfd_get_section_by_name (dynobj
, ".hash");
4960 BFD_ASSERT (finfo
.dynsym_sec
!= NULL
&& finfo
.hash_sec
!= NULL
);
4961 finfo
.symver_sec
= bfd_get_section_by_name (dynobj
, ".gnu.version");
4962 /* Note that it is OK if symver_sec is NULL. */
4965 finfo
.contents
= NULL
;
4966 finfo
.external_relocs
= NULL
;
4967 finfo
.internal_relocs
= NULL
;
4968 finfo
.external_syms
= NULL
;
4969 finfo
.locsym_shndx
= NULL
;
4970 finfo
.internal_syms
= NULL
;
4971 finfo
.indices
= NULL
;
4972 finfo
.sections
= NULL
;
4973 finfo
.symbuf
= NULL
;
4974 finfo
.symshndxbuf
= NULL
;
4975 finfo
.symbuf_count
= 0;
4976 finfo
.shndxbuf_size
= 0;
4977 finfo
.first_tls_sec
= NULL
;
4978 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
4979 if ((o
->flags
& SEC_THREAD_LOCAL
) != 0
4980 && (o
->flags
& SEC_LOAD
) != 0)
4982 finfo
.first_tls_sec
= o
;
4986 /* Count up the number of relocations we will output for each output
4987 section, so that we know the sizes of the reloc sections. We
4988 also figure out some maximum sizes. */
4989 max_contents_size
= 0;
4990 max_external_reloc_size
= 0;
4991 max_internal_reloc_count
= 0;
4993 max_sym_shndx_count
= 0;
4995 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
4999 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
5001 if (p
->type
== bfd_section_reloc_link_order
5002 || p
->type
== bfd_symbol_reloc_link_order
)
5004 else if (p
->type
== bfd_indirect_link_order
)
5008 sec
= p
->u
.indirect
.section
;
5010 /* Mark all sections which are to be included in the
5011 link. This will normally be every section. We need
5012 to do this so that we can identify any sections which
5013 the linker has decided to not include. */
5014 sec
->linker_mark
= true;
5016 if (sec
->flags
& SEC_MERGE
)
5019 if (info
->relocateable
|| info
->emitrelocations
)
5020 o
->reloc_count
+= sec
->reloc_count
;
5021 else if (bed
->elf_backend_count_relocs
)
5023 Elf_Internal_Rela
* relocs
;
5025 relocs
= (NAME(_bfd_elf
,link_read_relocs
)
5026 (abfd
, sec
, (PTR
) NULL
,
5027 (Elf_Internal_Rela
*) NULL
, info
->keep_memory
));
5030 += (*bed
->elf_backend_count_relocs
) (sec
, relocs
);
5032 if (elf_section_data (o
)->relocs
!= relocs
)
5036 if (sec
->_raw_size
> max_contents_size
)
5037 max_contents_size
= sec
->_raw_size
;
5038 if (sec
->_cooked_size
> max_contents_size
)
5039 max_contents_size
= sec
->_cooked_size
;
5041 /* We are interested in just local symbols, not all
5043 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
5044 && (sec
->owner
->flags
& DYNAMIC
) == 0)
5048 if (elf_bad_symtab (sec
->owner
))
5049 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
5050 / sizeof (Elf_External_Sym
));
5052 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
5054 if (sym_count
> max_sym_count
)
5055 max_sym_count
= sym_count
;
5057 if (sym_count
> max_sym_shndx_count
5058 && elf_symtab_shndx (sec
->owner
) != 0)
5059 max_sym_shndx_count
= sym_count
;
5061 if ((sec
->flags
& SEC_RELOC
) != 0)
5065 ext_size
= elf_section_data (sec
)->rel_hdr
.sh_size
;
5066 if (ext_size
> max_external_reloc_size
)
5067 max_external_reloc_size
= ext_size
;
5068 if (sec
->reloc_count
> max_internal_reloc_count
)
5069 max_internal_reloc_count
= sec
->reloc_count
;
5075 if (o
->reloc_count
> 0)
5076 o
->flags
|= SEC_RELOC
;
5079 /* Explicitly clear the SEC_RELOC flag. The linker tends to
5080 set it (this is probably a bug) and if it is set
5081 assign_section_numbers will create a reloc section. */
5082 o
->flags
&=~ SEC_RELOC
;
5085 /* If the SEC_ALLOC flag is not set, force the section VMA to
5086 zero. This is done in elf_fake_sections as well, but forcing
5087 the VMA to 0 here will ensure that relocs against these
5088 sections are handled correctly. */
5089 if ((o
->flags
& SEC_ALLOC
) == 0
5090 && ! o
->user_set_vma
)
5094 if (! info
->relocateable
&& merged
)
5095 elf_link_hash_traverse (elf_hash_table (info
),
5096 elf_link_sec_merge_syms
, (PTR
) abfd
);
5098 /* Figure out the file positions for everything but the symbol table
5099 and the relocs. We set symcount to force assign_section_numbers
5100 to create a symbol table. */
5101 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
5102 BFD_ASSERT (! abfd
->output_has_begun
);
5103 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
5106 /* Figure out how many relocations we will have in each section.
5107 Just using RELOC_COUNT isn't good enough since that doesn't
5108 maintain a separate value for REL vs. RELA relocations. */
5110 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5111 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5113 asection
*output_section
;
5115 if (! o
->linker_mark
)
5117 /* This section was omitted from the link. */
5121 output_section
= o
->output_section
;
5123 if (output_section
!= NULL
5124 && (o
->flags
& SEC_RELOC
) != 0)
5126 struct bfd_elf_section_data
*esdi
5127 = elf_section_data (o
);
5128 struct bfd_elf_section_data
*esdo
5129 = elf_section_data (output_section
);
5130 unsigned int *rel_count
;
5131 unsigned int *rel_count2
;
5132 bfd_size_type entsize
;
5133 bfd_size_type entsize2
;
5135 /* We must be careful to add the relocations from the
5136 input section to the right output count. */
5137 entsize
= esdi
->rel_hdr
.sh_entsize
;
5138 entsize2
= esdi
->rel_hdr2
? esdi
->rel_hdr2
->sh_entsize
: 0;
5139 BFD_ASSERT ((entsize
== sizeof (Elf_External_Rel
)
5140 || entsize
== sizeof (Elf_External_Rela
))
5141 && entsize2
!= entsize
5143 || entsize2
== sizeof (Elf_External_Rel
)
5144 || entsize2
== sizeof (Elf_External_Rela
)));
5145 if (entsize
== esdo
->rel_hdr
.sh_entsize
)
5147 rel_count
= &esdo
->rel_count
;
5148 rel_count2
= &esdo
->rel_count2
;
5152 rel_count
= &esdo
->rel_count2
;
5153 rel_count2
= &esdo
->rel_count
;
5156 *rel_count
+= NUM_SHDR_ENTRIES (& esdi
->rel_hdr
);
5158 *rel_count2
+= NUM_SHDR_ENTRIES (esdi
->rel_hdr2
);
5159 output_section
->flags
|= SEC_RELOC
;
5163 /* That created the reloc sections. Set their sizes, and assign
5164 them file positions, and allocate some buffers. */
5165 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5167 if ((o
->flags
& SEC_RELOC
) != 0)
5169 if (!elf_link_size_reloc_section (abfd
,
5170 &elf_section_data (o
)->rel_hdr
,
5174 if (elf_section_data (o
)->rel_hdr2
5175 && !elf_link_size_reloc_section (abfd
,
5176 elf_section_data (o
)->rel_hdr2
,
5181 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
5182 to count upwards while actually outputting the relocations. */
5183 elf_section_data (o
)->rel_count
= 0;
5184 elf_section_data (o
)->rel_count2
= 0;
5187 _bfd_elf_assign_file_positions_for_relocs (abfd
);
5189 /* We have now assigned file positions for all the sections except
5190 .symtab and .strtab. We start the .symtab section at the current
5191 file position, and write directly to it. We build the .strtab
5192 section in memory. */
5193 bfd_get_symcount (abfd
) = 0;
5194 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5195 /* sh_name is set in prep_headers. */
5196 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5197 /* sh_flags, sh_addr and sh_size all start off zero. */
5198 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
5199 /* sh_link is set in assign_section_numbers. */
5200 /* sh_info is set below. */
5201 /* sh_offset is set just below. */
5202 symtab_hdr
->sh_addralign
= bed
->s
->file_align
;
5204 off
= elf_tdata (abfd
)->next_file_pos
;
5205 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, true);
5207 /* Note that at this point elf_tdata (abfd)->next_file_pos is
5208 incorrect. We do not yet know the size of the .symtab section.
5209 We correct next_file_pos below, after we do know the size. */
5211 /* Allocate a buffer to hold swapped out symbols. This is to avoid
5212 continuously seeking to the right position in the file. */
5213 if (! info
->keep_memory
|| max_sym_count
< 20)
5214 finfo
.symbuf_size
= 20;
5216 finfo
.symbuf_size
= max_sym_count
;
5217 amt
= finfo
.symbuf_size
;
5218 amt
*= sizeof (Elf_External_Sym
);
5219 finfo
.symbuf
= (Elf_External_Sym
*) bfd_malloc (amt
);
5220 if (finfo
.symbuf
== NULL
)
5222 if (elf_numsections (abfd
) > SHN_LORESERVE
)
5224 /* Wild guess at number of output symbols. realloc'd as needed. */
5225 amt
= 2 * max_sym_count
+ elf_numsections (abfd
) + 1000;
5226 finfo
.shndxbuf_size
= amt
;
5227 amt
*= sizeof (Elf_External_Sym_Shndx
);
5228 finfo
.symshndxbuf
= (Elf_External_Sym_Shndx
*) bfd_zmalloc (amt
);
5229 if (finfo
.symshndxbuf
== NULL
)
5233 /* Start writing out the symbol table. The first symbol is always a
5235 if (info
->strip
!= strip_all
5238 elfsym
.st_value
= 0;
5241 elfsym
.st_other
= 0;
5242 elfsym
.st_shndx
= SHN_UNDEF
;
5243 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
5244 &elfsym
, bfd_und_section_ptr
))
5249 /* Some standard ELF linkers do this, but we don't because it causes
5250 bootstrap comparison failures. */
5251 /* Output a file symbol for the output file as the second symbol.
5252 We output this even if we are discarding local symbols, although
5253 I'm not sure if this is correct. */
5254 elfsym
.st_value
= 0;
5256 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5257 elfsym
.st_other
= 0;
5258 elfsym
.st_shndx
= SHN_ABS
;
5259 if (! elf_link_output_sym (&finfo
, bfd_get_filename (abfd
),
5260 &elfsym
, bfd_abs_section_ptr
))
5264 /* Output a symbol for each section. We output these even if we are
5265 discarding local symbols, since they are used for relocs. These
5266 symbols have no names. We store the index of each one in the
5267 index field of the section, so that we can find it again when
5268 outputting relocs. */
5269 if (info
->strip
!= strip_all
5273 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5274 elfsym
.st_other
= 0;
5275 for (i
= 1; i
< elf_numsections (abfd
); i
++)
5277 o
= section_from_elf_index (abfd
, i
);
5279 o
->target_index
= bfd_get_symcount (abfd
);
5280 elfsym
.st_shndx
= i
;
5281 if (info
->relocateable
|| o
== NULL
)
5282 elfsym
.st_value
= 0;
5284 elfsym
.st_value
= o
->vma
;
5285 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
5288 if (i
== SHN_LORESERVE
- 1)
5289 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
5293 /* Allocate some memory to hold information read in from the input
5295 if (max_contents_size
!= 0)
5297 finfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
5298 if (finfo
.contents
== NULL
)
5302 if (max_external_reloc_size
!= 0)
5304 finfo
.external_relocs
= (PTR
) bfd_malloc (max_external_reloc_size
);
5305 if (finfo
.external_relocs
== NULL
)
5309 if (max_internal_reloc_count
!= 0)
5311 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
5312 amt
*= sizeof (Elf_Internal_Rela
);
5313 finfo
.internal_relocs
= (Elf_Internal_Rela
*) bfd_malloc (amt
);
5314 if (finfo
.internal_relocs
== NULL
)
5318 if (max_sym_count
!= 0)
5320 amt
= max_sym_count
* sizeof (Elf_External_Sym
);
5321 finfo
.external_syms
= (Elf_External_Sym
*) bfd_malloc (amt
);
5322 if (finfo
.external_syms
== NULL
)
5325 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
5326 finfo
.internal_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
5327 if (finfo
.internal_syms
== NULL
)
5330 amt
= max_sym_count
* sizeof (long);
5331 finfo
.indices
= (long *) bfd_malloc (amt
);
5332 if (finfo
.indices
== NULL
)
5335 amt
= max_sym_count
* sizeof (asection
*);
5336 finfo
.sections
= (asection
**) bfd_malloc (amt
);
5337 if (finfo
.sections
== NULL
)
5341 if (max_sym_shndx_count
!= 0)
5343 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
5344 finfo
.locsym_shndx
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
5345 if (finfo
.locsym_shndx
== NULL
)
5349 if (finfo
.first_tls_sec
)
5351 unsigned int align
= 0;
5352 bfd_vma base
= finfo
.first_tls_sec
->vma
, end
= 0;
5355 for (sec
= finfo
.first_tls_sec
;
5356 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
5359 bfd_vma size
= sec
->_raw_size
;
5361 if (bfd_get_section_alignment (abfd
, sec
) > align
)
5362 align
= bfd_get_section_alignment (abfd
, sec
);
5363 if (sec
->_raw_size
== 0 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
5365 struct bfd_link_order
*o
;
5368 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
5369 if (size
< o
->offset
+ o
->size
)
5370 size
= o
->offset
+ o
->size
;
5372 end
= sec
->vma
+ size
;
5374 elf_hash_table (info
)->tls_segment
5375 = bfd_zalloc (abfd
, sizeof (struct elf_link_tls_segment
));
5376 if (elf_hash_table (info
)->tls_segment
== NULL
)
5378 elf_hash_table (info
)->tls_segment
->start
= base
;
5379 elf_hash_table (info
)->tls_segment
->size
= end
- base
;
5380 elf_hash_table (info
)->tls_segment
->align
= align
;
5383 /* Since ELF permits relocations to be against local symbols, we
5384 must have the local symbols available when we do the relocations.
5385 Since we would rather only read the local symbols once, and we
5386 would rather not keep them in memory, we handle all the
5387 relocations for a single input file at the same time.
5389 Unfortunately, there is no way to know the total number of local
5390 symbols until we have seen all of them, and the local symbol
5391 indices precede the global symbol indices. This means that when
5392 we are generating relocateable output, and we see a reloc against
5393 a global symbol, we can not know the symbol index until we have
5394 finished examining all the local symbols to see which ones we are
5395 going to output. To deal with this, we keep the relocations in
5396 memory, and don't output them until the end of the link. This is
5397 an unfortunate waste of memory, but I don't see a good way around
5398 it. Fortunately, it only happens when performing a relocateable
5399 link, which is not the common case. FIXME: If keep_memory is set
5400 we could write the relocs out and then read them again; I don't
5401 know how bad the memory loss will be. */
5403 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5404 sub
->output_has_begun
= false;
5405 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5407 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
5409 if (p
->type
== bfd_indirect_link_order
5410 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
5411 == bfd_target_elf_flavour
)
5412 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
5414 if (! sub
->output_has_begun
)
5416 if (! elf_link_input_bfd (&finfo
, sub
))
5418 sub
->output_has_begun
= true;
5421 else if (p
->type
== bfd_section_reloc_link_order
5422 || p
->type
== bfd_symbol_reloc_link_order
)
5424 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
5429 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
5435 /* Output any global symbols that got converted to local in a
5436 version script or due to symbol visibility. We do this in a
5437 separate step since ELF requires all local symbols to appear
5438 prior to any global symbols. FIXME: We should only do this if
5439 some global symbols were, in fact, converted to become local.
5440 FIXME: Will this work correctly with the Irix 5 linker? */
5441 eoinfo
.failed
= false;
5442 eoinfo
.finfo
= &finfo
;
5443 eoinfo
.localsyms
= true;
5444 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
5449 /* That wrote out all the local symbols. Finish up the symbol table
5450 with the global symbols. Even if we want to strip everything we
5451 can, we still need to deal with those global symbols that got
5452 converted to local in a version script. */
5454 /* The sh_info field records the index of the first non local symbol. */
5455 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
5458 && finfo
.dynsym_sec
->output_section
!= bfd_abs_section_ptr
)
5460 Elf_Internal_Sym sym
;
5461 Elf_External_Sym
*dynsym
=
5462 (Elf_External_Sym
*) finfo
.dynsym_sec
->contents
;
5463 long last_local
= 0;
5465 /* Write out the section symbols for the output sections. */
5472 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5475 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
5478 Elf_External_Sym
*dest
;
5480 indx
= elf_section_data (s
)->this_idx
;
5481 BFD_ASSERT (indx
> 0);
5482 sym
.st_shndx
= indx
;
5483 sym
.st_value
= s
->vma
;
5484 dest
= dynsym
+ elf_section_data (s
)->dynindx
;
5485 elf_swap_symbol_out (abfd
, &sym
, (PTR
) dest
, (PTR
) 0);
5488 last_local
= bfd_count_sections (abfd
);
5491 /* Write out the local dynsyms. */
5492 if (elf_hash_table (info
)->dynlocal
)
5494 struct elf_link_local_dynamic_entry
*e
;
5495 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
5498 Elf_External_Sym
*dest
;
5500 sym
.st_size
= e
->isym
.st_size
;
5501 sym
.st_other
= e
->isym
.st_other
;
5503 /* Copy the internal symbol as is.
5504 Note that we saved a word of storage and overwrote
5505 the original st_name with the dynstr_index. */
5508 if (e
->isym
.st_shndx
!= SHN_UNDEF
5509 && (e
->isym
.st_shndx
< SHN_LORESERVE
5510 || e
->isym
.st_shndx
> SHN_HIRESERVE
))
5512 s
= bfd_section_from_elf_index (e
->input_bfd
,
5516 elf_section_data (s
->output_section
)->this_idx
;
5517 sym
.st_value
= (s
->output_section
->vma
5519 + e
->isym
.st_value
);
5522 if (last_local
< e
->dynindx
)
5523 last_local
= e
->dynindx
;
5525 dest
= dynsym
+ e
->dynindx
;
5526 elf_swap_symbol_out (abfd
, &sym
, (PTR
) dest
, (PTR
) 0);
5530 elf_section_data (finfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
5534 /* We get the global symbols from the hash table. */
5535 eoinfo
.failed
= false;
5536 eoinfo
.localsyms
= false;
5537 eoinfo
.finfo
= &finfo
;
5538 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
5543 /* If backend needs to output some symbols not present in the hash
5544 table, do it now. */
5545 if (bed
->elf_backend_output_arch_syms
)
5547 typedef boolean (*out_sym_func
) PARAMS ((PTR
, const char *,
5551 if (! ((*bed
->elf_backend_output_arch_syms
)
5552 (abfd
, info
, (PTR
) &finfo
, (out_sym_func
) elf_link_output_sym
)))
5556 /* Flush all symbols to the file. */
5557 if (! elf_link_flush_output_syms (&finfo
))
5560 /* Now we know the size of the symtab section. */
5561 off
+= symtab_hdr
->sh_size
;
5563 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5564 if (symtab_shndx_hdr
->sh_name
!= 0)
5566 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5567 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5568 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5569 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
5570 symtab_shndx_hdr
->sh_size
= amt
;
5572 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
5575 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
5576 || (bfd_bwrite ((PTR
) finfo
.symshndxbuf
, amt
, abfd
) != amt
))
5581 /* Finish up and write out the symbol string table (.strtab)
5583 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5584 /* sh_name was set in prep_headers. */
5585 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5586 symstrtab_hdr
->sh_flags
= 0;
5587 symstrtab_hdr
->sh_addr
= 0;
5588 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (finfo
.symstrtab
);
5589 symstrtab_hdr
->sh_entsize
= 0;
5590 symstrtab_hdr
->sh_link
= 0;
5591 symstrtab_hdr
->sh_info
= 0;
5592 /* sh_offset is set just below. */
5593 symstrtab_hdr
->sh_addralign
= 1;
5595 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, true);
5596 elf_tdata (abfd
)->next_file_pos
= off
;
5598 if (bfd_get_symcount (abfd
) > 0)
5600 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
5601 || ! _bfd_stringtab_emit (abfd
, finfo
.symstrtab
))
5605 /* Adjust the relocs to have the correct symbol indices. */
5606 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5608 if ((o
->flags
& SEC_RELOC
) == 0)
5611 elf_link_adjust_relocs (abfd
, &elf_section_data (o
)->rel_hdr
,
5612 elf_section_data (o
)->rel_count
,
5613 elf_section_data (o
)->rel_hashes
);
5614 if (elf_section_data (o
)->rel_hdr2
!= NULL
)
5615 elf_link_adjust_relocs (abfd
, elf_section_data (o
)->rel_hdr2
,
5616 elf_section_data (o
)->rel_count2
,
5617 (elf_section_data (o
)->rel_hashes
5618 + elf_section_data (o
)->rel_count
));
5620 /* Set the reloc_count field to 0 to prevent write_relocs from
5621 trying to swap the relocs out itself. */
5625 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
5626 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
5628 /* If we are linking against a dynamic object, or generating a
5629 shared library, finish up the dynamic linking information. */
5632 Elf_External_Dyn
*dyncon
, *dynconend
;
5634 /* Fix up .dynamic entries. */
5635 o
= bfd_get_section_by_name (dynobj
, ".dynamic");
5636 BFD_ASSERT (o
!= NULL
);
5638 dyncon
= (Elf_External_Dyn
*) o
->contents
;
5639 dynconend
= (Elf_External_Dyn
*) (o
->contents
+ o
->_raw_size
);
5640 for (; dyncon
< dynconend
; dyncon
++)
5642 Elf_Internal_Dyn dyn
;
5646 elf_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5653 if (relativecount
> 0 && dyncon
+ 1 < dynconend
)
5655 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
5657 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
5658 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
5661 if (dyn
.d_tag
!= DT_NULL
)
5663 dyn
.d_un
.d_val
= relativecount
;
5664 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5670 name
= info
->init_function
;
5673 name
= info
->fini_function
;
5676 struct elf_link_hash_entry
*h
;
5678 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
5679 false, false, true);
5681 && (h
->root
.type
== bfd_link_hash_defined
5682 || h
->root
.type
== bfd_link_hash_defweak
))
5684 dyn
.d_un
.d_val
= h
->root
.u
.def
.value
;
5685 o
= h
->root
.u
.def
.section
;
5686 if (o
->output_section
!= NULL
)
5687 dyn
.d_un
.d_val
+= (o
->output_section
->vma
5688 + o
->output_offset
);
5691 /* The symbol is imported from another shared
5692 library and does not apply to this one. */
5696 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5701 case DT_PREINIT_ARRAYSZ
:
5702 name
= ".preinit_array";
5704 case DT_INIT_ARRAYSZ
:
5705 name
= ".init_array";
5707 case DT_FINI_ARRAYSZ
:
5708 name
= ".fini_array";
5710 o
= bfd_get_section_by_name (abfd
, name
);
5713 (*_bfd_error_handler
)
5714 (_("%s: could not find output section %s"),
5715 bfd_get_filename (abfd
), name
);
5718 if (o
->_raw_size
== 0)
5719 (*_bfd_error_handler
)
5720 (_("warning: %s section has zero size"), name
);
5721 dyn
.d_un
.d_val
= o
->_raw_size
;
5722 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5725 case DT_PREINIT_ARRAY
:
5726 name
= ".preinit_array";
5729 name
= ".init_array";
5732 name
= ".fini_array";
5745 name
= ".gnu.version_d";
5748 name
= ".gnu.version_r";
5751 name
= ".gnu.version";
5753 o
= bfd_get_section_by_name (abfd
, name
);
5756 (*_bfd_error_handler
)
5757 (_("%s: could not find output section %s"),
5758 bfd_get_filename (abfd
), name
);
5761 dyn
.d_un
.d_ptr
= o
->vma
;
5762 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5769 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
5774 for (i
= 1; i
< elf_numsections (abfd
); i
++)
5776 Elf_Internal_Shdr
*hdr
;
5778 hdr
= elf_elfsections (abfd
)[i
];
5779 if (hdr
->sh_type
== type
5780 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
5782 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
5783 dyn
.d_un
.d_val
+= hdr
->sh_size
;
5786 if (dyn
.d_un
.d_val
== 0
5787 || hdr
->sh_addr
< dyn
.d_un
.d_val
)
5788 dyn
.d_un
.d_val
= hdr
->sh_addr
;
5792 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
5798 /* If we have created any dynamic sections, then output them. */
5801 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
5804 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
5806 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
5807 || o
->_raw_size
== 0
5808 || o
->output_section
== bfd_abs_section_ptr
)
5810 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
5812 /* At this point, we are only interested in sections
5813 created by elf_link_create_dynamic_sections. */
5816 if ((elf_section_data (o
->output_section
)->this_hdr
.sh_type
5818 || strcmp (bfd_get_section_name (abfd
, o
), ".dynstr") != 0)
5820 if (! bfd_set_section_contents (abfd
, o
->output_section
,
5822 (file_ptr
) o
->output_offset
,
5828 /* The contents of the .dynstr section are actually in a
5830 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
5831 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
5832 || ! _bfd_elf_strtab_emit (abfd
,
5833 elf_hash_table (info
)->dynstr
))
5839 if (info
->relocateable
)
5841 boolean failed
= false;
5843 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
5848 /* If we have optimized stabs strings, output them. */
5849 if (elf_hash_table (info
)->stab_info
!= NULL
)
5851 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
5855 if (info
->eh_frame_hdr
)
5857 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
5861 if (finfo
.symstrtab
!= NULL
)
5862 _bfd_stringtab_free (finfo
.symstrtab
);
5863 if (finfo
.contents
!= NULL
)
5864 free (finfo
.contents
);
5865 if (finfo
.external_relocs
!= NULL
)
5866 free (finfo
.external_relocs
);
5867 if (finfo
.internal_relocs
!= NULL
)
5868 free (finfo
.internal_relocs
);
5869 if (finfo
.external_syms
!= NULL
)
5870 free (finfo
.external_syms
);
5871 if (finfo
.locsym_shndx
!= NULL
)
5872 free (finfo
.locsym_shndx
);
5873 if (finfo
.internal_syms
!= NULL
)
5874 free (finfo
.internal_syms
);
5875 if (finfo
.indices
!= NULL
)
5876 free (finfo
.indices
);
5877 if (finfo
.sections
!= NULL
)
5878 free (finfo
.sections
);
5879 if (finfo
.symbuf
!= NULL
)
5880 free (finfo
.symbuf
);
5881 if (finfo
.symshndxbuf
!= NULL
)
5882 free (finfo
.symshndxbuf
);
5883 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5885 if ((o
->flags
& SEC_RELOC
) != 0
5886 && elf_section_data (o
)->rel_hashes
!= NULL
)
5887 free (elf_section_data (o
)->rel_hashes
);
5890 elf_tdata (abfd
)->linker
= true;
5895 if (finfo
.symstrtab
!= NULL
)
5896 _bfd_stringtab_free (finfo
.symstrtab
);
5897 if (finfo
.contents
!= NULL
)
5898 free (finfo
.contents
);
5899 if (finfo
.external_relocs
!= NULL
)
5900 free (finfo
.external_relocs
);
5901 if (finfo
.internal_relocs
!= NULL
)
5902 free (finfo
.internal_relocs
);
5903 if (finfo
.external_syms
!= NULL
)
5904 free (finfo
.external_syms
);
5905 if (finfo
.locsym_shndx
!= NULL
)
5906 free (finfo
.locsym_shndx
);
5907 if (finfo
.internal_syms
!= NULL
)
5908 free (finfo
.internal_syms
);
5909 if (finfo
.indices
!= NULL
)
5910 free (finfo
.indices
);
5911 if (finfo
.sections
!= NULL
)
5912 free (finfo
.sections
);
5913 if (finfo
.symbuf
!= NULL
)
5914 free (finfo
.symbuf
);
5915 if (finfo
.symshndxbuf
!= NULL
)
5916 free (finfo
.symshndxbuf
);
5917 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
5919 if ((o
->flags
& SEC_RELOC
) != 0
5920 && elf_section_data (o
)->rel_hashes
!= NULL
)
5921 free (elf_section_data (o
)->rel_hashes
);
5927 /* Add a symbol to the output symbol table. */
5930 elf_link_output_sym (finfo
, name
, elfsym
, input_sec
)
5931 struct elf_final_link_info
*finfo
;
5933 Elf_Internal_Sym
*elfsym
;
5934 asection
*input_sec
;
5936 Elf_External_Sym
*dest
;
5937 Elf_External_Sym_Shndx
*destshndx
;
5939 boolean (*output_symbol_hook
) PARAMS ((bfd
*,
5940 struct bfd_link_info
*info
,
5945 output_symbol_hook
= get_elf_backend_data (finfo
->output_bfd
)->
5946 elf_backend_link_output_symbol_hook
;
5947 if (output_symbol_hook
!= NULL
)
5949 if (! ((*output_symbol_hook
)
5950 (finfo
->output_bfd
, finfo
->info
, name
, elfsym
, input_sec
)))
5954 if (name
== (const char *) NULL
|| *name
== '\0')
5955 elfsym
->st_name
= 0;
5956 else if (input_sec
->flags
& SEC_EXCLUDE
)
5957 elfsym
->st_name
= 0;
5960 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (finfo
->symstrtab
,
5962 if (elfsym
->st_name
== (unsigned long) -1)
5966 if (finfo
->symbuf_count
>= finfo
->symbuf_size
)
5968 if (! elf_link_flush_output_syms (finfo
))
5972 dest
= finfo
->symbuf
+ finfo
->symbuf_count
;
5973 destshndx
= finfo
->symshndxbuf
;
5974 if (destshndx
!= NULL
)
5976 if (bfd_get_symcount (finfo
->output_bfd
) >= finfo
->shndxbuf_size
)
5980 amt
= finfo
->shndxbuf_size
* sizeof (Elf_External_Sym_Shndx
);
5981 finfo
->symshndxbuf
= destshndx
= bfd_realloc (destshndx
, amt
* 2);
5982 if (destshndx
== NULL
)
5984 memset ((char *) destshndx
+ amt
, 0, amt
);
5985 finfo
->shndxbuf_size
*= 2;
5987 destshndx
+= bfd_get_symcount (finfo
->output_bfd
);
5990 elf_swap_symbol_out (finfo
->output_bfd
, elfsym
, (PTR
) dest
, (PTR
) destshndx
);
5991 finfo
->symbuf_count
+= 1;
5992 bfd_get_symcount (finfo
->output_bfd
) += 1;
5997 /* Flush the output symbols to the file. */
6000 elf_link_flush_output_syms (finfo
)
6001 struct elf_final_link_info
*finfo
;
6003 if (finfo
->symbuf_count
> 0)
6005 Elf_Internal_Shdr
*hdr
;
6009 hdr
= &elf_tdata (finfo
->output_bfd
)->symtab_hdr
;
6010 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
6011 amt
= finfo
->symbuf_count
* sizeof (Elf_External_Sym
);
6012 if (bfd_seek (finfo
->output_bfd
, pos
, SEEK_SET
) != 0
6013 || bfd_bwrite ((PTR
) finfo
->symbuf
, amt
, finfo
->output_bfd
) != amt
)
6016 hdr
->sh_size
+= amt
;
6017 finfo
->symbuf_count
= 0;
6023 /* Adjust all external symbols pointing into SEC_MERGE sections
6024 to reflect the object merging within the sections. */
6027 elf_link_sec_merge_syms (h
, data
)
6028 struct elf_link_hash_entry
*h
;
6033 if (h
->root
.type
== bfd_link_hash_warning
)
6034 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6036 if ((h
->root
.type
== bfd_link_hash_defined
6037 || h
->root
.type
== bfd_link_hash_defweak
)
6038 && ((sec
= h
->root
.u
.def
.section
)->flags
& SEC_MERGE
)
6039 && elf_section_data (sec
)->sec_info_type
== ELF_INFO_TYPE_MERGE
)
6041 bfd
*output_bfd
= (bfd
*) data
;
6043 h
->root
.u
.def
.value
=
6044 _bfd_merged_section_offset (output_bfd
,
6045 &h
->root
.u
.def
.section
,
6046 elf_section_data (sec
)->sec_info
,
6047 h
->root
.u
.def
.value
, (bfd_vma
) 0);
6053 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
6054 allowing an unsatisfied unversioned symbol in the DSO to match a
6055 versioned symbol that would normally require an explicit version. */
6058 elf_link_check_versioned_symbol (info
, h
)
6059 struct bfd_link_info
*info
;
6060 struct elf_link_hash_entry
*h
;
6062 bfd
*undef_bfd
= h
->root
.u
.undef
.abfd
;
6063 struct elf_link_loaded_list
*loaded
;
6065 if ((undef_bfd
->flags
& DYNAMIC
) == 0
6066 || info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
6067 || elf_dt_soname (h
->root
.u
.undef
.abfd
) == NULL
)
6070 for (loaded
= elf_hash_table (info
)->loaded
;
6072 loaded
= loaded
->next
)
6075 Elf_Internal_Shdr
*hdr
;
6076 bfd_size_type symcount
;
6077 bfd_size_type extsymcount
;
6078 bfd_size_type extsymoff
;
6079 Elf_Internal_Shdr
*versymhdr
;
6080 Elf_Internal_Sym
*isym
;
6081 Elf_Internal_Sym
*isymend
;
6082 Elf_Internal_Sym
*isymbuf
;
6083 Elf_External_Versym
*ever
;
6084 Elf_External_Versym
*extversym
;
6086 input
= loaded
->abfd
;
6088 /* We check each DSO for a possible hidden versioned definition. */
6089 if (input
== undef_bfd
6090 || (input
->flags
& DYNAMIC
) == 0
6091 || elf_dynversym (input
) == 0)
6094 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
6096 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6097 if (elf_bad_symtab (input
))
6099 extsymcount
= symcount
;
6104 extsymcount
= symcount
- hdr
->sh_info
;
6105 extsymoff
= hdr
->sh_info
;
6108 if (extsymcount
== 0)
6111 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
6113 if (isymbuf
== NULL
)
6116 /* Read in any version definitions. */
6117 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
6118 extversym
= (Elf_External_Versym
*) bfd_malloc (versymhdr
->sh_size
);
6119 if (extversym
== NULL
)
6122 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
6123 || (bfd_bread ((PTR
) extversym
, versymhdr
->sh_size
, input
)
6124 != versymhdr
->sh_size
))
6132 ever
= extversym
+ extsymoff
;
6133 isymend
= isymbuf
+ extsymcount
;
6134 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
6137 Elf_Internal_Versym iver
;
6139 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
6140 || isym
->st_shndx
== SHN_UNDEF
)
6143 name
= bfd_elf_string_from_elf_section (input
,
6146 if (strcmp (name
, h
->root
.root
.string
) != 0)
6149 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
6151 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0)
6153 /* If we have a non-hidden versioned sym, then it should
6154 have provided a definition for the undefined sym. */
6158 if ((iver
.vs_vers
& VERSYM_VERSION
) == 2)
6160 /* This is the oldest (default) sym. We can use it. */
6174 /* Add an external symbol to the symbol table. This is called from
6175 the hash table traversal routine. When generating a shared object,
6176 we go through the symbol table twice. The first time we output
6177 anything that might have been forced to local scope in a version
6178 script. The second time we output the symbols that are still
6182 elf_link_output_extsym (h
, data
)
6183 struct elf_link_hash_entry
*h
;
6186 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
6187 struct elf_final_link_info
*finfo
= eoinfo
->finfo
;
6189 Elf_Internal_Sym sym
;
6190 asection
*input_sec
;
6192 if (h
->root
.type
== bfd_link_hash_warning
)
6194 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6195 if (h
->root
.type
== bfd_link_hash_new
)
6199 /* Decide whether to output this symbol in this pass. */
6200 if (eoinfo
->localsyms
)
6202 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
6207 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
6211 /* If we are not creating a shared library, and this symbol is
6212 referenced by a shared library but is not defined anywhere, then
6213 warn that it is undefined. If we do not do this, the runtime
6214 linker will complain that the symbol is undefined when the
6215 program is run. We don't have to worry about symbols that are
6216 referenced by regular files, because we will already have issued
6217 warnings for them. */
6218 if (! finfo
->info
->relocateable
6219 && ! finfo
->info
->allow_shlib_undefined
6220 && ! finfo
->info
->shared
6221 && h
->root
.type
== bfd_link_hash_undefined
6222 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0
6223 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0
6224 && ! elf_link_check_versioned_symbol (finfo
->info
, h
))
6226 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
6227 (finfo
->info
, h
->root
.root
.string
, h
->root
.u
.undef
.abfd
,
6228 (asection
*) NULL
, (bfd_vma
) 0, true)))
6230 eoinfo
->failed
= true;
6235 /* We don't want to output symbols that have never been mentioned by
6236 a regular file, or that we have been told to strip. However, if
6237 h->indx is set to -2, the symbol is used by a reloc and we must
6241 else if (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
6242 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0)
6243 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
6244 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0)
6246 else if (finfo
->info
->strip
== strip_all
6247 || (finfo
->info
->strip
== strip_some
6248 && bfd_hash_lookup (finfo
->info
->keep_hash
,
6249 h
->root
.root
.string
,
6250 false, false) == NULL
))
6255 /* If we're stripping it, and it's not a dynamic symbol, there's
6256 nothing else to do unless it is a forced local symbol. */
6259 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
6263 sym
.st_size
= h
->size
;
6264 sym
.st_other
= h
->other
;
6265 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
6266 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
6267 else if (h
->root
.type
== bfd_link_hash_undefweak
6268 || h
->root
.type
== bfd_link_hash_defweak
)
6269 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
6271 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
6273 switch (h
->root
.type
)
6276 case bfd_link_hash_new
:
6277 case bfd_link_hash_warning
:
6281 case bfd_link_hash_undefined
:
6282 case bfd_link_hash_undefweak
:
6283 input_sec
= bfd_und_section_ptr
;
6284 sym
.st_shndx
= SHN_UNDEF
;
6287 case bfd_link_hash_defined
:
6288 case bfd_link_hash_defweak
:
6290 input_sec
= h
->root
.u
.def
.section
;
6291 if (input_sec
->output_section
!= NULL
)
6294 _bfd_elf_section_from_bfd_section (finfo
->output_bfd
,
6295 input_sec
->output_section
);
6296 if (sym
.st_shndx
== SHN_BAD
)
6298 (*_bfd_error_handler
)
6299 (_("%s: could not find output section %s for input section %s"),
6300 bfd_get_filename (finfo
->output_bfd
),
6301 input_sec
->output_section
->name
,
6303 eoinfo
->failed
= true;
6307 /* ELF symbols in relocateable files are section relative,
6308 but in nonrelocateable files they are virtual
6310 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
6311 if (! finfo
->info
->relocateable
)
6313 sym
.st_value
+= input_sec
->output_section
->vma
;
6314 if (h
->type
== STT_TLS
)
6316 /* STT_TLS symbols are relative to PT_TLS segment
6318 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
6319 sym
.st_value
-= finfo
->first_tls_sec
->vma
;
6325 BFD_ASSERT (input_sec
->owner
== NULL
6326 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
6327 sym
.st_shndx
= SHN_UNDEF
;
6328 input_sec
= bfd_und_section_ptr
;
6333 case bfd_link_hash_common
:
6334 input_sec
= h
->root
.u
.c
.p
->section
;
6335 sym
.st_shndx
= SHN_COMMON
;
6336 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
6339 case bfd_link_hash_indirect
:
6340 /* These symbols are created by symbol versioning. They point
6341 to the decorated version of the name. For example, if the
6342 symbol foo@@GNU_1.2 is the default, which should be used when
6343 foo is used with no version, then we add an indirect symbol
6344 foo which points to foo@@GNU_1.2. We ignore these symbols,
6345 since the indirected symbol is already in the hash table. */
6349 /* Give the processor backend a chance to tweak the symbol value,
6350 and also to finish up anything that needs to be done for this
6351 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
6352 forced local syms when non-shared is due to a historical quirk. */
6353 if ((h
->dynindx
!= -1
6354 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
6355 && (finfo
->info
->shared
6356 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
6357 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
6359 struct elf_backend_data
*bed
;
6361 bed
= get_elf_backend_data (finfo
->output_bfd
);
6362 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
6363 (finfo
->output_bfd
, finfo
->info
, h
, &sym
)))
6365 eoinfo
->failed
= true;
6370 /* If we are marking the symbol as undefined, and there are no
6371 non-weak references to this symbol from a regular object, then
6372 mark the symbol as weak undefined; if there are non-weak
6373 references, mark the symbol as strong. We can't do this earlier,
6374 because it might not be marked as undefined until the
6375 finish_dynamic_symbol routine gets through with it. */
6376 if (sym
.st_shndx
== SHN_UNDEF
6377 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
6378 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
6379 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
6383 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
) != 0)
6384 bindtype
= STB_GLOBAL
;
6386 bindtype
= STB_WEAK
;
6387 sym
.st_info
= ELF_ST_INFO (bindtype
, ELF_ST_TYPE (sym
.st_info
));
6390 /* If a symbol is not defined locally, we clear the visibility field. */
6391 if (! finfo
->info
->relocateable
6392 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
6393 sym
.st_other
&= ~ ELF_ST_VISIBILITY (-1);
6395 /* If this symbol should be put in the .dynsym section, then put it
6396 there now. We already know the symbol index. We also fill in
6397 the entry in the .hash section. */
6398 if (h
->dynindx
!= -1
6399 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
6403 size_t hash_entry_size
;
6404 bfd_byte
*bucketpos
;
6406 Elf_External_Sym
*esym
;
6408 sym
.st_name
= h
->dynstr_index
;
6409 esym
= (Elf_External_Sym
*) finfo
->dynsym_sec
->contents
+ h
->dynindx
;
6410 elf_swap_symbol_out (finfo
->output_bfd
, &sym
, (PTR
) esym
, (PTR
) 0);
6412 bucketcount
= elf_hash_table (finfo
->info
)->bucketcount
;
6413 bucket
= h
->elf_hash_value
% bucketcount
;
6415 = elf_section_data (finfo
->hash_sec
)->this_hdr
.sh_entsize
;
6416 bucketpos
= ((bfd_byte
*) finfo
->hash_sec
->contents
6417 + (bucket
+ 2) * hash_entry_size
);
6418 chain
= bfd_get (8 * hash_entry_size
, finfo
->output_bfd
, bucketpos
);
6419 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, (bfd_vma
) h
->dynindx
,
6421 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, chain
,
6422 ((bfd_byte
*) finfo
->hash_sec
->contents
6423 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
6425 if (finfo
->symver_sec
!= NULL
&& finfo
->symver_sec
->contents
!= NULL
)
6427 Elf_Internal_Versym iversym
;
6428 Elf_External_Versym
*eversym
;
6430 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
6432 if (h
->verinfo
.verdef
== NULL
)
6433 iversym
.vs_vers
= 0;
6435 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
6439 if (h
->verinfo
.vertree
== NULL
)
6440 iversym
.vs_vers
= 1;
6442 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
6445 if ((h
->elf_link_hash_flags
& ELF_LINK_HIDDEN
) != 0)
6446 iversym
.vs_vers
|= VERSYM_HIDDEN
;
6448 eversym
= (Elf_External_Versym
*) finfo
->symver_sec
->contents
;
6449 eversym
+= h
->dynindx
;
6450 _bfd_elf_swap_versym_out (finfo
->output_bfd
, &iversym
, eversym
);
6454 /* If we're stripping it, then it was just a dynamic symbol, and
6455 there's nothing else to do. */
6456 if (strip
|| (input_sec
->flags
& SEC_EXCLUDE
) != 0)
6459 h
->indx
= bfd_get_symcount (finfo
->output_bfd
);
6461 if (! elf_link_output_sym (finfo
, h
->root
.root
.string
, &sym
, input_sec
))
6463 eoinfo
->failed
= true;
6470 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
6471 originated from the section given by INPUT_REL_HDR) to the
6475 elf_link_output_relocs (output_bfd
, input_section
, input_rel_hdr
,
6478 asection
*input_section
;
6479 Elf_Internal_Shdr
*input_rel_hdr
;
6480 Elf_Internal_Rela
*internal_relocs
;
6482 Elf_Internal_Rela
*irela
;
6483 Elf_Internal_Rela
*irelaend
;
6484 Elf_Internal_Shdr
*output_rel_hdr
;
6485 asection
*output_section
;
6486 unsigned int *rel_countp
= NULL
;
6487 struct elf_backend_data
*bed
;
6490 output_section
= input_section
->output_section
;
6491 output_rel_hdr
= NULL
;
6493 if (elf_section_data (output_section
)->rel_hdr
.sh_entsize
6494 == input_rel_hdr
->sh_entsize
)
6496 output_rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
6497 rel_countp
= &elf_section_data (output_section
)->rel_count
;
6499 else if (elf_section_data (output_section
)->rel_hdr2
6500 && (elf_section_data (output_section
)->rel_hdr2
->sh_entsize
6501 == input_rel_hdr
->sh_entsize
))
6503 output_rel_hdr
= elf_section_data (output_section
)->rel_hdr2
;
6504 rel_countp
= &elf_section_data (output_section
)->rel_count2
;
6508 (*_bfd_error_handler
)
6509 (_("%s: relocation size mismatch in %s section %s"),
6510 bfd_get_filename (output_bfd
),
6511 bfd_archive_filename (input_section
->owner
),
6512 input_section
->name
);
6513 bfd_set_error (bfd_error_wrong_object_format
);
6517 bed
= get_elf_backend_data (output_bfd
);
6518 irela
= internal_relocs
;
6519 irelaend
= irela
+ (NUM_SHDR_ENTRIES (input_rel_hdr
)
6520 * bed
->s
->int_rels_per_ext_rel
);
6522 if (input_rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
6524 Elf_External_Rel
*erel
;
6525 Elf_Internal_Rel
*irel
;
6527 amt
= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rel
);
6528 irel
= (Elf_Internal_Rel
*) bfd_zmalloc (amt
);
6531 (*_bfd_error_handler
) (_("Error: out of memory"));
6535 erel
= ((Elf_External_Rel
*) output_rel_hdr
->contents
+ *rel_countp
);
6536 for (; irela
< irelaend
; irela
+= bed
->s
->int_rels_per_ext_rel
, erel
++)
6540 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
6542 irel
[i
].r_offset
= irela
[i
].r_offset
;
6543 irel
[i
].r_info
= irela
[i
].r_info
;
6544 BFD_ASSERT (irela
[i
].r_addend
== 0);
6547 if (bed
->s
->swap_reloc_out
)
6548 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, (PTR
) erel
);
6550 elf_swap_reloc_out (output_bfd
, irel
, erel
);
6557 Elf_External_Rela
*erela
;
6559 BFD_ASSERT (input_rel_hdr
->sh_entsize
== sizeof (Elf_External_Rela
));
6561 erela
= ((Elf_External_Rela
*) output_rel_hdr
->contents
+ *rel_countp
);
6562 for (; irela
< irelaend
; irela
+= bed
->s
->int_rels_per_ext_rel
, erela
++)
6563 if (bed
->s
->swap_reloca_out
)
6564 (*bed
->s
->swap_reloca_out
) (output_bfd
, irela
, (PTR
) erela
);
6566 elf_swap_reloca_out (output_bfd
, irela
, erela
);
6569 /* Bump the counter, so that we know where to add the next set of
6571 *rel_countp
+= NUM_SHDR_ENTRIES (input_rel_hdr
);
6576 /* Link an input file into the linker output file. This function
6577 handles all the sections and relocations of the input file at once.
6578 This is so that we only have to read the local symbols once, and
6579 don't have to keep them in memory. */
6582 elf_link_input_bfd (finfo
, input_bfd
)
6583 struct elf_final_link_info
*finfo
;
6586 boolean (*relocate_section
) PARAMS ((bfd
*, struct bfd_link_info
*,
6587 bfd
*, asection
*, bfd_byte
*,
6588 Elf_Internal_Rela
*,
6589 Elf_Internal_Sym
*, asection
**));
6591 Elf_Internal_Shdr
*symtab_hdr
;
6594 Elf_Internal_Sym
*isymbuf
;
6595 Elf_Internal_Sym
*isym
;
6596 Elf_Internal_Sym
*isymend
;
6598 asection
**ppsection
;
6600 struct elf_backend_data
*bed
;
6601 boolean emit_relocs
;
6602 struct elf_link_hash_entry
**sym_hashes
;
6604 output_bfd
= finfo
->output_bfd
;
6605 bed
= get_elf_backend_data (output_bfd
);
6606 relocate_section
= bed
->elf_backend_relocate_section
;
6608 /* If this is a dynamic object, we don't want to do anything here:
6609 we don't want the local symbols, and we don't want the section
6611 if ((input_bfd
->flags
& DYNAMIC
) != 0)
6614 emit_relocs
= (finfo
->info
->relocateable
6615 || finfo
->info
->emitrelocations
6616 || bed
->elf_backend_emit_relocs
);
6618 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
6619 if (elf_bad_symtab (input_bfd
))
6621 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6626 locsymcount
= symtab_hdr
->sh_info
;
6627 extsymoff
= symtab_hdr
->sh_info
;
6630 /* Read the local symbols. */
6631 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
6632 if (isymbuf
== NULL
&& locsymcount
!= 0)
6634 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
6635 finfo
->internal_syms
,
6636 finfo
->external_syms
,
6637 finfo
->locsym_shndx
);
6638 if (isymbuf
== NULL
)
6642 /* Find local symbol sections and adjust values of symbols in
6643 SEC_MERGE sections. Write out those local symbols we know are
6644 going into the output file. */
6645 isymend
= isymbuf
+ locsymcount
;
6646 for (isym
= isymbuf
, pindex
= finfo
->indices
, ppsection
= finfo
->sections
;
6648 isym
++, pindex
++, ppsection
++)
6652 Elf_Internal_Sym osym
;
6656 if (elf_bad_symtab (input_bfd
))
6658 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
6665 if (isym
->st_shndx
== SHN_UNDEF
)
6666 isec
= bfd_und_section_ptr
;
6667 else if (isym
->st_shndx
< SHN_LORESERVE
6668 || isym
->st_shndx
> SHN_HIRESERVE
)
6670 isec
= section_from_elf_index (input_bfd
, isym
->st_shndx
);
6672 && elf_section_data (isec
)->sec_info_type
== ELF_INFO_TYPE_MERGE
6673 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
6675 _bfd_merged_section_offset (output_bfd
, &isec
,
6676 elf_section_data (isec
)->sec_info
,
6677 isym
->st_value
, (bfd_vma
) 0);
6679 else if (isym
->st_shndx
== SHN_ABS
)
6680 isec
= bfd_abs_section_ptr
;
6681 else if (isym
->st_shndx
== SHN_COMMON
)
6682 isec
= bfd_com_section_ptr
;
6691 /* Don't output the first, undefined, symbol. */
6692 if (ppsection
== finfo
->sections
)
6695 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
6697 /* We never output section symbols. Instead, we use the
6698 section symbol of the corresponding section in the output
6703 /* If we are stripping all symbols, we don't want to output this
6705 if (finfo
->info
->strip
== strip_all
)
6708 /* If we are discarding all local symbols, we don't want to
6709 output this one. If we are generating a relocateable output
6710 file, then some of the local symbols may be required by
6711 relocs; we output them below as we discover that they are
6713 if (finfo
->info
->discard
== discard_all
)
6716 /* If this symbol is defined in a section which we are
6717 discarding, we don't need to keep it, but note that
6718 linker_mark is only reliable for sections that have contents.
6719 For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
6720 as well as linker_mark. */
6721 if ((isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
6723 && ((! isec
->linker_mark
&& (isec
->flags
& SEC_HAS_CONTENTS
) != 0)
6724 || (! finfo
->info
->relocateable
6725 && (isec
->flags
& SEC_EXCLUDE
) != 0)))
6728 /* Get the name of the symbol. */
6729 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
6734 /* See if we are discarding symbols with this name. */
6735 if ((finfo
->info
->strip
== strip_some
6736 && (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false, false)
6738 || (((finfo
->info
->discard
== discard_sec_merge
6739 && (isec
->flags
& SEC_MERGE
) && ! finfo
->info
->relocateable
)
6740 || finfo
->info
->discard
== discard_l
)
6741 && bfd_is_local_label_name (input_bfd
, name
)))
6744 /* If we get here, we are going to output this symbol. */
6748 /* Adjust the section index for the output file. */
6749 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
6750 isec
->output_section
);
6751 if (osym
.st_shndx
== SHN_BAD
)
6754 *pindex
= bfd_get_symcount (output_bfd
);
6756 /* ELF symbols in relocateable files are section relative, but
6757 in executable files they are virtual addresses. Note that
6758 this code assumes that all ELF sections have an associated
6759 BFD section with a reasonable value for output_offset; below
6760 we assume that they also have a reasonable value for
6761 output_section. Any special sections must be set up to meet
6762 these requirements. */
6763 osym
.st_value
+= isec
->output_offset
;
6764 if (! finfo
->info
->relocateable
)
6766 osym
.st_value
+= isec
->output_section
->vma
;
6767 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
6769 /* STT_TLS symbols are relative to PT_TLS segment base. */
6770 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
6771 osym
.st_value
-= finfo
->first_tls_sec
->vma
;
6775 if (! elf_link_output_sym (finfo
, name
, &osym
, isec
))
6779 /* Relocate the contents of each section. */
6780 sym_hashes
= elf_sym_hashes (input_bfd
);
6781 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
6785 if (! o
->linker_mark
)
6787 /* This section was omitted from the link. */
6791 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
6792 || (o
->_raw_size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
6795 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
6797 /* Section was created by elf_link_create_dynamic_sections
6802 /* Get the contents of the section. They have been cached by a
6803 relaxation routine. Note that o is a section in an input
6804 file, so the contents field will not have been set by any of
6805 the routines which work on output files. */
6806 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
6807 contents
= elf_section_data (o
)->this_hdr
.contents
;
6810 contents
= finfo
->contents
;
6811 if (! bfd_get_section_contents (input_bfd
, o
, contents
,
6812 (file_ptr
) 0, o
->_raw_size
))
6816 if ((o
->flags
& SEC_RELOC
) != 0)
6818 Elf_Internal_Rela
*internal_relocs
;
6820 /* Get the swapped relocs. */
6821 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
6822 (input_bfd
, o
, finfo
->external_relocs
,
6823 finfo
->internal_relocs
, false));
6824 if (internal_relocs
== NULL
6825 && o
->reloc_count
> 0)
6828 /* Run through the relocs looking for any against symbols
6829 from discarded sections and section symbols from
6830 removed link-once sections. Complain about relocs
6831 against discarded sections. Zero relocs against removed
6832 link-once sections. */
6833 if (!finfo
->info
->relocateable
6834 && !elf_section_ignore_discarded_relocs (o
))
6836 Elf_Internal_Rela
*rel
, *relend
;
6838 rel
= internal_relocs
;
6839 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
6840 for ( ; rel
< relend
; rel
++)
6842 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
6844 if (r_symndx
>= locsymcount
6845 || (elf_bad_symtab (input_bfd
)
6846 && finfo
->sections
[r_symndx
] == NULL
))
6848 struct elf_link_hash_entry
*h
;
6850 h
= sym_hashes
[r_symndx
- extsymoff
];
6851 while (h
->root
.type
== bfd_link_hash_indirect
6852 || h
->root
.type
== bfd_link_hash_warning
)
6853 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6855 /* Complain if the definition comes from a
6856 discarded section. */
6857 if ((h
->root
.type
== bfd_link_hash_defined
6858 || h
->root
.type
== bfd_link_hash_defweak
)
6859 && elf_discarded_section (h
->root
.u
.def
.section
))
6861 if ((o
->flags
& SEC_DEBUGGING
) != 0)
6863 BFD_ASSERT (r_symndx
!= 0);
6864 memset (rel
, 0, sizeof (*rel
));
6868 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
6869 (finfo
->info
, h
->root
.root
.string
,
6870 input_bfd
, o
, rel
->r_offset
,
6878 asection
*sec
= finfo
->sections
[r_symndx
];
6880 if (sec
!= NULL
&& elf_discarded_section (sec
))
6882 if ((o
->flags
& SEC_DEBUGGING
) != 0
6883 || (sec
->flags
& SEC_LINK_ONCE
) != 0)
6885 BFD_ASSERT (r_symndx
!= 0);
6887 = ELF_R_INFO (0, ELF_R_TYPE (rel
->r_info
));
6894 = _("local symbols in discarded section %s");
6896 = strlen (sec
->name
) + strlen (msg
) - 1;
6897 char *buf
= (char *) bfd_malloc (amt
);
6900 sprintf (buf
, msg
, sec
->name
);
6902 buf
= (char *) sec
->name
;
6903 ok
= (*finfo
->info
->callbacks
6904 ->undefined_symbol
) (finfo
->info
, buf
,
6908 if (buf
!= sec
->name
)
6918 /* Relocate the section by invoking a back end routine.
6920 The back end routine is responsible for adjusting the
6921 section contents as necessary, and (if using Rela relocs
6922 and generating a relocateable output file) adjusting the
6923 reloc addend as necessary.
6925 The back end routine does not have to worry about setting
6926 the reloc address or the reloc symbol index.
6928 The back end routine is given a pointer to the swapped in
6929 internal symbols, and can access the hash table entries
6930 for the external symbols via elf_sym_hashes (input_bfd).
6932 When generating relocateable output, the back end routine
6933 must handle STB_LOCAL/STT_SECTION symbols specially. The
6934 output symbol is going to be a section symbol
6935 corresponding to the output section, which will require
6936 the addend to be adjusted. */
6938 if (! (*relocate_section
) (output_bfd
, finfo
->info
,
6939 input_bfd
, o
, contents
,
6947 Elf_Internal_Rela
*irela
;
6948 Elf_Internal_Rela
*irelaend
;
6949 struct elf_link_hash_entry
**rel_hash
;
6950 Elf_Internal_Shdr
*input_rel_hdr
, *input_rel_hdr2
;
6951 unsigned int next_erel
;
6952 boolean (*reloc_emitter
) PARAMS ((bfd
*, asection
*,
6953 Elf_Internal_Shdr
*,
6954 Elf_Internal_Rela
*));
6955 boolean rela_normal
;
6957 input_rel_hdr
= &elf_section_data (o
)->rel_hdr
;
6958 rela_normal
= (bed
->rela_normal
6959 && (input_rel_hdr
->sh_entsize
6960 == sizeof (Elf_External_Rela
)));
6962 /* Adjust the reloc addresses and symbol indices. */
6964 irela
= internal_relocs
;
6965 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
6966 rel_hash
= (elf_section_data (o
->output_section
)->rel_hashes
6967 + elf_section_data (o
->output_section
)->rel_count
6968 + elf_section_data (o
->output_section
)->rel_count2
);
6969 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
6971 unsigned long r_symndx
;
6973 Elf_Internal_Sym sym
;
6975 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
6981 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
6984 if (irela
->r_offset
>= (bfd_vma
) -2)
6986 /* This is a reloc for a deleted entry or somesuch. */
6987 memset (irela
, 0, sizeof (*irela
));
6991 irela
->r_offset
+= o
->output_offset
;
6993 /* Relocs in an executable have to be virtual addresses. */
6994 if (!finfo
->info
->relocateable
)
6995 irela
->r_offset
+= o
->output_section
->vma
;
6997 r_symndx
= ELF_R_SYM (irela
->r_info
);
7002 if (r_symndx
>= locsymcount
7003 || (elf_bad_symtab (input_bfd
)
7004 && finfo
->sections
[r_symndx
] == NULL
))
7006 struct elf_link_hash_entry
*rh
;
7009 /* This is a reloc against a global symbol. We
7010 have not yet output all the local symbols, so
7011 we do not know the symbol index of any global
7012 symbol. We set the rel_hash entry for this
7013 reloc to point to the global hash table entry
7014 for this symbol. The symbol index is then
7015 set at the end of elf_bfd_final_link. */
7016 indx
= r_symndx
- extsymoff
;
7017 rh
= elf_sym_hashes (input_bfd
)[indx
];
7018 while (rh
->root
.type
== bfd_link_hash_indirect
7019 || rh
->root
.type
== bfd_link_hash_warning
)
7020 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
7022 /* Setting the index to -2 tells
7023 elf_link_output_extsym that this symbol is
7025 BFD_ASSERT (rh
->indx
< 0);
7033 /* This is a reloc against a local symbol. */
7036 sym
= isymbuf
[r_symndx
];
7037 sec
= finfo
->sections
[r_symndx
];
7038 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
7040 /* I suppose the backend ought to fill in the
7041 section of any STT_SECTION symbol against a
7042 processor specific section. If we have
7043 discarded a section, the output_section will
7044 be the absolute section. */
7045 if (bfd_is_abs_section (sec
)
7047 && bfd_is_abs_section (sec
->output_section
)))
7049 else if (sec
== NULL
|| sec
->owner
== NULL
)
7051 bfd_set_error (bfd_error_bad_value
);
7056 r_symndx
= sec
->output_section
->target_index
;
7057 BFD_ASSERT (r_symndx
!= 0);
7060 /* Adjust the addend according to where the
7061 section winds up in the output section. */
7063 irela
->r_addend
+= sec
->output_offset
;
7067 if (finfo
->indices
[r_symndx
] == -1)
7069 unsigned long shlink
;
7073 if (finfo
->info
->strip
== strip_all
)
7075 /* You can't do ld -r -s. */
7076 bfd_set_error (bfd_error_invalid_operation
);
7080 /* This symbol was skipped earlier, but
7081 since it is needed by a reloc, we
7082 must output it now. */
7083 shlink
= symtab_hdr
->sh_link
;
7084 name
= (bfd_elf_string_from_elf_section
7085 (input_bfd
, shlink
, sym
.st_name
));
7089 osec
= sec
->output_section
;
7091 _bfd_elf_section_from_bfd_section (output_bfd
,
7093 if (sym
.st_shndx
== SHN_BAD
)
7096 sym
.st_value
+= sec
->output_offset
;
7097 if (! finfo
->info
->relocateable
)
7099 sym
.st_value
+= osec
->vma
;
7100 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
7102 /* STT_TLS symbols are relative to PT_TLS
7104 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
7105 sym
.st_value
-= finfo
->first_tls_sec
->vma
;
7109 finfo
->indices
[r_symndx
]
7110 = bfd_get_symcount (output_bfd
);
7112 if (! elf_link_output_sym (finfo
, name
, &sym
, sec
))
7116 r_symndx
= finfo
->indices
[r_symndx
];
7119 irela
->r_info
= ELF_R_INFO (r_symndx
,
7120 ELF_R_TYPE (irela
->r_info
));
7123 /* Swap out the relocs. */
7124 if (bed
->elf_backend_emit_relocs
7125 && !(finfo
->info
->relocateable
7126 || finfo
->info
->emitrelocations
))
7127 reloc_emitter
= bed
->elf_backend_emit_relocs
;
7129 reloc_emitter
= elf_link_output_relocs
;
7131 if (input_rel_hdr
->sh_size
!= 0
7132 && ! (*reloc_emitter
) (output_bfd
, o
, input_rel_hdr
,
7136 input_rel_hdr2
= elf_section_data (o
)->rel_hdr2
;
7137 if (input_rel_hdr2
&& input_rel_hdr2
->sh_size
!= 0)
7139 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
7140 * bed
->s
->int_rels_per_ext_rel
);
7141 if (! (*reloc_emitter
) (output_bfd
, o
, input_rel_hdr2
,
7148 /* Write out the modified section contents. */
7149 if (bed
->elf_backend_write_section
7150 && (*bed
->elf_backend_write_section
) (output_bfd
, o
, contents
))
7152 /* Section written out. */
7154 else switch (elf_section_data (o
)->sec_info_type
)
7156 case ELF_INFO_TYPE_STABS
:
7157 if (! (_bfd_write_section_stabs
7159 &elf_hash_table (finfo
->info
)->stab_info
,
7160 o
, &elf_section_data (o
)->sec_info
, contents
)))
7163 case ELF_INFO_TYPE_MERGE
:
7164 if (! _bfd_write_merged_section (output_bfd
, o
,
7165 elf_section_data (o
)->sec_info
))
7168 case ELF_INFO_TYPE_EH_FRAME
:
7170 if (! _bfd_elf_write_section_eh_frame (output_bfd
, finfo
->info
,
7177 bfd_size_type sec_size
;
7179 sec_size
= (o
->_cooked_size
!= 0 ? o
->_cooked_size
: o
->_raw_size
);
7180 if (! (o
->flags
& SEC_EXCLUDE
)
7181 && ! bfd_set_section_contents (output_bfd
, o
->output_section
,
7183 (file_ptr
) o
->output_offset
,
7194 /* Generate a reloc when linking an ELF file. This is a reloc
7195 requested by the linker, and does come from any input file. This
7196 is used to build constructor and destructor tables when linking
7200 elf_reloc_link_order (output_bfd
, info
, output_section
, link_order
)
7202 struct bfd_link_info
*info
;
7203 asection
*output_section
;
7204 struct bfd_link_order
*link_order
;
7206 reloc_howto_type
*howto
;
7210 struct elf_link_hash_entry
**rel_hash_ptr
;
7211 Elf_Internal_Shdr
*rel_hdr
;
7212 struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
7214 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
7217 bfd_set_error (bfd_error_bad_value
);
7221 addend
= link_order
->u
.reloc
.p
->addend
;
7223 /* Figure out the symbol index. */
7224 rel_hash_ptr
= (elf_section_data (output_section
)->rel_hashes
7225 + elf_section_data (output_section
)->rel_count
7226 + elf_section_data (output_section
)->rel_count2
);
7227 if (link_order
->type
== bfd_section_reloc_link_order
)
7229 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
7230 BFD_ASSERT (indx
!= 0);
7231 *rel_hash_ptr
= NULL
;
7235 struct elf_link_hash_entry
*h
;
7237 /* Treat a reloc against a defined symbol as though it were
7238 actually against the section. */
7239 h
= ((struct elf_link_hash_entry
*)
7240 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
7241 link_order
->u
.reloc
.p
->u
.name
,
7242 false, false, true));
7244 && (h
->root
.type
== bfd_link_hash_defined
7245 || h
->root
.type
== bfd_link_hash_defweak
))
7249 section
= h
->root
.u
.def
.section
;
7250 indx
= section
->output_section
->target_index
;
7251 *rel_hash_ptr
= NULL
;
7252 /* It seems that we ought to add the symbol value to the
7253 addend here, but in practice it has already been added
7254 because it was passed to constructor_callback. */
7255 addend
+= section
->output_section
->vma
+ section
->output_offset
;
7259 /* Setting the index to -2 tells elf_link_output_extsym that
7260 this symbol is used by a reloc. */
7267 if (! ((*info
->callbacks
->unattached_reloc
)
7268 (info
, link_order
->u
.reloc
.p
->u
.name
, (bfd
*) NULL
,
7269 (asection
*) NULL
, (bfd_vma
) 0)))
7275 /* If this is an inplace reloc, we must write the addend into the
7277 if (howto
->partial_inplace
&& addend
!= 0)
7280 bfd_reloc_status_type rstat
;
7283 const char *sym_name
;
7285 size
= bfd_get_reloc_size (howto
);
7286 buf
= (bfd_byte
*) bfd_zmalloc (size
);
7287 if (buf
== (bfd_byte
*) NULL
)
7289 rstat
= _bfd_relocate_contents (howto
, output_bfd
, (bfd_vma
) addend
, buf
);
7296 case bfd_reloc_outofrange
:
7299 case bfd_reloc_overflow
:
7300 if (link_order
->type
== bfd_section_reloc_link_order
)
7301 sym_name
= bfd_section_name (output_bfd
,
7302 link_order
->u
.reloc
.p
->u
.section
);
7304 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
7305 if (! ((*info
->callbacks
->reloc_overflow
)
7306 (info
, sym_name
, howto
->name
, addend
,
7307 (bfd
*) NULL
, (asection
*) NULL
, (bfd_vma
) 0)))
7314 ok
= bfd_set_section_contents (output_bfd
, output_section
, (PTR
) buf
,
7315 (file_ptr
) link_order
->offset
, size
);
7321 /* The address of a reloc is relative to the section in a
7322 relocateable file, and is a virtual address in an executable
7324 offset
= link_order
->offset
;
7325 if (! info
->relocateable
)
7326 offset
+= output_section
->vma
;
7328 rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
7330 if (rel_hdr
->sh_type
== SHT_REL
)
7333 Elf_Internal_Rel
*irel
;
7334 Elf_External_Rel
*erel
;
7337 size
= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rel
);
7338 irel
= (Elf_Internal_Rel
*) bfd_zmalloc (size
);
7342 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
7343 irel
[i
].r_offset
= offset
;
7344 irel
[0].r_info
= ELF_R_INFO (indx
, howto
->type
);
7346 erel
= ((Elf_External_Rel
*) rel_hdr
->contents
7347 + elf_section_data (output_section
)->rel_count
);
7349 if (bed
->s
->swap_reloc_out
)
7350 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, (bfd_byte
*) erel
);
7352 elf_swap_reloc_out (output_bfd
, irel
, erel
);
7359 Elf_Internal_Rela
*irela
;
7360 Elf_External_Rela
*erela
;
7363 size
= bed
->s
->int_rels_per_ext_rel
* sizeof (Elf_Internal_Rela
);
7364 irela
= (Elf_Internal_Rela
*) bfd_zmalloc (size
);
7368 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
7369 irela
[i
].r_offset
= offset
;
7370 irela
[0].r_info
= ELF_R_INFO (indx
, howto
->type
);
7371 irela
[0].r_addend
= addend
;
7373 erela
= ((Elf_External_Rela
*) rel_hdr
->contents
7374 + elf_section_data (output_section
)->rel_count
);
7376 if (bed
->s
->swap_reloca_out
)
7377 (*bed
->s
->swap_reloca_out
) (output_bfd
, irela
, (bfd_byte
*) erela
);
7379 elf_swap_reloca_out (output_bfd
, irela
, erela
);
7382 ++elf_section_data (output_section
)->rel_count
;
7387 /* Allocate a pointer to live in a linker created section. */
7390 elf_create_pointer_linker_section (abfd
, info
, lsect
, h
, rel
)
7392 struct bfd_link_info
*info
;
7393 elf_linker_section_t
*lsect
;
7394 struct elf_link_hash_entry
*h
;
7395 const Elf_Internal_Rela
*rel
;
7397 elf_linker_section_pointers_t
**ptr_linker_section_ptr
= NULL
;
7398 elf_linker_section_pointers_t
*linker_section_ptr
;
7399 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
7402 BFD_ASSERT (lsect
!= NULL
);
7404 /* Is this a global symbol? */
7407 /* Has this symbol already been allocated? If so, our work is done. */
7408 if (_bfd_elf_find_pointer_linker_section (h
->linker_section_pointer
,
7413 ptr_linker_section_ptr
= &h
->linker_section_pointer
;
7414 /* Make sure this symbol is output as a dynamic symbol. */
7415 if (h
->dynindx
== -1)
7417 if (! elf_link_record_dynamic_symbol (info
, h
))
7421 if (lsect
->rel_section
)
7422 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
7426 /* Allocation of a pointer to a local symbol. */
7427 elf_linker_section_pointers_t
**ptr
= elf_local_ptr_offsets (abfd
);
7429 /* Allocate a table to hold the local symbols if first time. */
7432 unsigned int num_symbols
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
7433 register unsigned int i
;
7436 amt
*= sizeof (elf_linker_section_pointers_t
*);
7437 ptr
= (elf_linker_section_pointers_t
**) bfd_alloc (abfd
, amt
);
7442 elf_local_ptr_offsets (abfd
) = ptr
;
7443 for (i
= 0; i
< num_symbols
; i
++)
7444 ptr
[i
] = (elf_linker_section_pointers_t
*) 0;
7447 /* Has this symbol already been allocated? If so, our work is done. */
7448 if (_bfd_elf_find_pointer_linker_section (ptr
[r_symndx
],
7453 ptr_linker_section_ptr
= &ptr
[r_symndx
];
7457 /* If we are generating a shared object, we need to
7458 output a R_<xxx>_RELATIVE reloc so that the
7459 dynamic linker can adjust this GOT entry. */
7460 BFD_ASSERT (lsect
->rel_section
!= NULL
);
7461 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
7465 /* Allocate space for a pointer in the linker section, and allocate
7466 a new pointer record from internal memory. */
7467 BFD_ASSERT (ptr_linker_section_ptr
!= NULL
);
7468 amt
= sizeof (elf_linker_section_pointers_t
);
7469 linker_section_ptr
= (elf_linker_section_pointers_t
*) bfd_alloc (abfd
, amt
);
7471 if (!linker_section_ptr
)
7474 linker_section_ptr
->next
= *ptr_linker_section_ptr
;
7475 linker_section_ptr
->addend
= rel
->r_addend
;
7476 linker_section_ptr
->which
= lsect
->which
;
7477 linker_section_ptr
->written_address_p
= false;
7478 *ptr_linker_section_ptr
= linker_section_ptr
;
7481 if (lsect
->hole_size
&& lsect
->hole_offset
< lsect
->max_hole_offset
)
7483 linker_section_ptr
->offset
= (lsect
->section
->_raw_size
7484 - lsect
->hole_size
+ (ARCH_SIZE
/ 8));
7485 lsect
->hole_offset
+= ARCH_SIZE
/ 8;
7486 lsect
->sym_offset
+= ARCH_SIZE
/ 8;
7487 if (lsect
->sym_hash
)
7489 /* Bump up symbol value if needed. */
7490 lsect
->sym_hash
->root
.u
.def
.value
+= ARCH_SIZE
/ 8;
7492 fprintf (stderr
, "Bump up %s by %ld, current value = %ld\n",
7493 lsect
->sym_hash
->root
.root
.string
,
7494 (long) ARCH_SIZE
/ 8,
7495 (long) lsect
->sym_hash
->root
.u
.def
.value
);
7501 linker_section_ptr
->offset
= lsect
->section
->_raw_size
;
7503 lsect
->section
->_raw_size
+= ARCH_SIZE
/ 8;
7507 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
7508 lsect
->name
, (long) linker_section_ptr
->offset
,
7509 (long) lsect
->section
->_raw_size
);
7516 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR)
7519 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR)
7522 /* Fill in the address for a pointer generated in a linker section. */
7525 elf_finish_pointer_linker_section (output_bfd
, input_bfd
, info
, lsect
, h
,
7526 relocation
, rel
, relative_reloc
)
7529 struct bfd_link_info
*info
;
7530 elf_linker_section_t
*lsect
;
7531 struct elf_link_hash_entry
*h
;
7533 const Elf_Internal_Rela
*rel
;
7536 elf_linker_section_pointers_t
*linker_section_ptr
;
7538 BFD_ASSERT (lsect
!= NULL
);
7542 /* Handle global symbol. */
7543 linker_section_ptr
= (_bfd_elf_find_pointer_linker_section
7544 (h
->linker_section_pointer
,
7548 BFD_ASSERT (linker_section_ptr
!= NULL
);
7550 if (! elf_hash_table (info
)->dynamic_sections_created
7553 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
7555 /* This is actually a static link, or it is a
7556 -Bsymbolic link and the symbol is defined
7557 locally. We must initialize this entry in the
7560 When doing a dynamic link, we create a .rela.<xxx>
7561 relocation entry to initialize the value. This
7562 is done in the finish_dynamic_symbol routine. */
7563 if (!linker_section_ptr
->written_address_p
)
7565 linker_section_ptr
->written_address_p
= true;
7566 bfd_put_ptr (output_bfd
,
7567 relocation
+ linker_section_ptr
->addend
,
7568 (lsect
->section
->contents
7569 + linker_section_ptr
->offset
));
7575 /* Handle local symbol. */
7576 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
7577 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
) != NULL
);
7578 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
)[r_symndx
] != NULL
);
7579 linker_section_ptr
= (_bfd_elf_find_pointer_linker_section
7580 (elf_local_ptr_offsets (input_bfd
)[r_symndx
],
7584 BFD_ASSERT (linker_section_ptr
!= NULL
);
7586 /* Write out pointer if it hasn't been rewritten out before. */
7587 if (!linker_section_ptr
->written_address_p
)
7589 linker_section_ptr
->written_address_p
= true;
7590 bfd_put_ptr (output_bfd
, relocation
+ linker_section_ptr
->addend
,
7591 lsect
->section
->contents
+ linker_section_ptr
->offset
);
7595 asection
*srel
= lsect
->rel_section
;
7596 Elf_Internal_Rela
*outrel
;
7597 Elf_External_Rela
*erel
;
7598 struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
7602 amt
= sizeof (Elf_Internal_Rela
) * bed
->s
->int_rels_per_ext_rel
;
7603 outrel
= (Elf_Internal_Rela
*) bfd_zmalloc (amt
);
7606 (*_bfd_error_handler
) (_("Error: out of memory"));
7610 /* We need to generate a relative reloc for the dynamic
7614 srel
= bfd_get_section_by_name (elf_hash_table (info
)->dynobj
,
7616 lsect
->rel_section
= srel
;
7619 BFD_ASSERT (srel
!= NULL
);
7621 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
7622 outrel
[i
].r_offset
= (lsect
->section
->output_section
->vma
7623 + lsect
->section
->output_offset
7624 + linker_section_ptr
->offset
);
7625 outrel
[0].r_info
= ELF_R_INFO (0, relative_reloc
);
7626 outrel
[0].r_addend
= 0;
7627 erel
= (Elf_External_Rela
*) lsect
->section
->contents
;
7628 erel
+= elf_section_data (lsect
->section
)->rel_count
;
7629 elf_swap_reloca_out (output_bfd
, outrel
, erel
);
7630 ++elf_section_data (lsect
->section
)->rel_count
;
7637 relocation
= (lsect
->section
->output_offset
7638 + linker_section_ptr
->offset
7639 - lsect
->hole_offset
7640 - lsect
->sym_offset
);
7644 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
7645 lsect
->name
, (long) relocation
, (long) relocation
);
7648 /* Subtract out the addend, because it will get added back in by the normal
7650 return relocation
- linker_section_ptr
->addend
;
7653 /* Garbage collect unused sections. */
7655 static boolean elf_gc_mark
7656 PARAMS ((struct bfd_link_info
*, asection
*,
7657 asection
* (*) (asection
*, struct bfd_link_info
*,
7658 Elf_Internal_Rela
*, struct elf_link_hash_entry
*,
7659 Elf_Internal_Sym
*)));
7661 static boolean elf_gc_sweep
7662 PARAMS ((struct bfd_link_info
*,
7663 boolean (*) (bfd
*, struct bfd_link_info
*, asection
*,
7664 const Elf_Internal_Rela
*)));
7666 static boolean elf_gc_sweep_symbol
7667 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7669 static boolean elf_gc_allocate_got_offsets
7670 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7672 static boolean elf_gc_propagate_vtable_entries_used
7673 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7675 static boolean elf_gc_smash_unused_vtentry_relocs
7676 PARAMS ((struct elf_link_hash_entry
*, PTR
));
7678 /* The mark phase of garbage collection. For a given section, mark
7679 it and any sections in this section's group, and all the sections
7680 which define symbols to which it refers. */
7683 elf_gc_mark (info
, sec
, gc_mark_hook
)
7684 struct bfd_link_info
*info
;
7686 asection
* (*gc_mark_hook
) PARAMS ((asection
*, struct bfd_link_info
*,
7687 Elf_Internal_Rela
*,
7688 struct elf_link_hash_entry
*,
7689 Elf_Internal_Sym
*));
7692 asection
*group_sec
;
7696 /* Mark all the sections in the group. */
7697 group_sec
= elf_section_data (sec
)->next_in_group
;
7698 if (group_sec
&& !group_sec
->gc_mark
)
7699 if (!elf_gc_mark (info
, group_sec
, gc_mark_hook
))
7702 /* Look through the section relocs. */
7704 if ((sec
->flags
& SEC_RELOC
) != 0 && sec
->reloc_count
> 0)
7706 Elf_Internal_Rela
*relstart
, *rel
, *relend
;
7707 Elf_Internal_Shdr
*symtab_hdr
;
7708 struct elf_link_hash_entry
**sym_hashes
;
7711 bfd
*input_bfd
= sec
->owner
;
7712 struct elf_backend_data
*bed
= get_elf_backend_data (input_bfd
);
7713 Elf_Internal_Sym
*isym
= NULL
;
7715 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
7716 sym_hashes
= elf_sym_hashes (input_bfd
);
7718 /* Read the local symbols. */
7719 if (elf_bad_symtab (input_bfd
))
7721 nlocsyms
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
7725 extsymoff
= nlocsyms
= symtab_hdr
->sh_info
;
7727 isym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
7728 if (isym
== NULL
&& nlocsyms
!= 0)
7730 isym
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, nlocsyms
, 0,
7736 /* Read the relocations. */
7737 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
7738 (input_bfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
7739 info
->keep_memory
));
7740 if (relstart
== NULL
)
7745 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
7747 for (rel
= relstart
; rel
< relend
; rel
++)
7749 unsigned long r_symndx
;
7751 struct elf_link_hash_entry
*h
;
7753 r_symndx
= ELF_R_SYM (rel
->r_info
);
7757 if (r_symndx
>= nlocsyms
7758 || ELF_ST_BIND (isym
[r_symndx
].st_info
) != STB_LOCAL
)
7760 h
= sym_hashes
[r_symndx
- extsymoff
];
7761 rsec
= (*gc_mark_hook
) (sec
, info
, rel
, h
, NULL
);
7765 rsec
= (*gc_mark_hook
) (sec
, info
, rel
, NULL
, &isym
[r_symndx
]);
7768 if (rsec
&& !rsec
->gc_mark
)
7770 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
)
7772 else if (!elf_gc_mark (info
, rsec
, gc_mark_hook
))
7781 if (elf_section_data (sec
)->relocs
!= relstart
)
7784 if (isym
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isym
)
7786 if (! info
->keep_memory
)
7789 symtab_hdr
->contents
= (unsigned char *) isym
;
7796 /* The sweep phase of garbage collection. Remove all garbage sections. */
7799 elf_gc_sweep (info
, gc_sweep_hook
)
7800 struct bfd_link_info
*info
;
7801 boolean (*gc_sweep_hook
) PARAMS ((bfd
*, struct bfd_link_info
*,
7802 asection
*, const Elf_Internal_Rela
*));
7806 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
7810 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
7813 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
7815 /* Keep special sections. Keep .debug sections. */
7816 if ((o
->flags
& SEC_LINKER_CREATED
)
7817 || (o
->flags
& SEC_DEBUGGING
))
7823 /* Skip sweeping sections already excluded. */
7824 if (o
->flags
& SEC_EXCLUDE
)
7827 /* Since this is early in the link process, it is simple
7828 to remove a section from the output. */
7829 o
->flags
|= SEC_EXCLUDE
;
7831 /* But we also have to update some of the relocation
7832 info we collected before. */
7834 && (o
->flags
& SEC_RELOC
) && o
->reloc_count
> 0)
7836 Elf_Internal_Rela
*internal_relocs
;
7839 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
7840 (o
->owner
, o
, NULL
, NULL
, info
->keep_memory
));
7841 if (internal_relocs
== NULL
)
7844 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
7846 if (elf_section_data (o
)->relocs
!= internal_relocs
)
7847 free (internal_relocs
);
7855 /* Remove the symbols that were in the swept sections from the dynamic
7856 symbol table. GCFIXME: Anyone know how to get them out of the
7857 static symbol table as well? */
7861 elf_link_hash_traverse (elf_hash_table (info
),
7862 elf_gc_sweep_symbol
,
7865 elf_hash_table (info
)->dynsymcount
= i
;
7871 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
7874 elf_gc_sweep_symbol (h
, idxptr
)
7875 struct elf_link_hash_entry
*h
;
7878 int *idx
= (int *) idxptr
;
7880 if (h
->root
.type
== bfd_link_hash_warning
)
7881 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7883 if (h
->dynindx
!= -1
7884 && ((h
->root
.type
!= bfd_link_hash_defined
7885 && h
->root
.type
!= bfd_link_hash_defweak
)
7886 || h
->root
.u
.def
.section
->gc_mark
))
7887 h
->dynindx
= (*idx
)++;
7892 /* Propogate collected vtable information. This is called through
7893 elf_link_hash_traverse. */
7896 elf_gc_propagate_vtable_entries_used (h
, okp
)
7897 struct elf_link_hash_entry
*h
;
7900 if (h
->root
.type
== bfd_link_hash_warning
)
7901 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7903 /* Those that are not vtables. */
7904 if (h
->vtable_parent
== NULL
)
7907 /* Those vtables that do not have parents, we cannot merge. */
7908 if (h
->vtable_parent
== (struct elf_link_hash_entry
*) -1)
7911 /* If we've already been done, exit. */
7912 if (h
->vtable_entries_used
&& h
->vtable_entries_used
[-1])
7915 /* Make sure the parent's table is up to date. */
7916 elf_gc_propagate_vtable_entries_used (h
->vtable_parent
, okp
);
7918 if (h
->vtable_entries_used
== NULL
)
7920 /* None of this table's entries were referenced. Re-use the
7922 h
->vtable_entries_used
= h
->vtable_parent
->vtable_entries_used
;
7923 h
->vtable_entries_size
= h
->vtable_parent
->vtable_entries_size
;
7930 /* Or the parent's entries into ours. */
7931 cu
= h
->vtable_entries_used
;
7933 pu
= h
->vtable_parent
->vtable_entries_used
;
7936 asection
*sec
= h
->root
.u
.def
.section
;
7937 struct elf_backend_data
*bed
= get_elf_backend_data (sec
->owner
);
7938 int file_align
= bed
->s
->file_align
;
7940 n
= h
->vtable_parent
->vtable_entries_size
/ file_align
;
7955 elf_gc_smash_unused_vtentry_relocs (h
, okp
)
7956 struct elf_link_hash_entry
*h
;
7960 bfd_vma hstart
, hend
;
7961 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
7962 struct elf_backend_data
*bed
;
7965 if (h
->root
.type
== bfd_link_hash_warning
)
7966 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7968 /* Take care of both those symbols that do not describe vtables as
7969 well as those that are not loaded. */
7970 if (h
->vtable_parent
== NULL
)
7973 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
7974 || h
->root
.type
== bfd_link_hash_defweak
);
7976 sec
= h
->root
.u
.def
.section
;
7977 hstart
= h
->root
.u
.def
.value
;
7978 hend
= hstart
+ h
->size
;
7980 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
7981 (sec
->owner
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
, true));
7983 return *(boolean
*) okp
= false;
7984 bed
= get_elf_backend_data (sec
->owner
);
7985 file_align
= bed
->s
->file_align
;
7987 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
7989 for (rel
= relstart
; rel
< relend
; ++rel
)
7990 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
7992 /* If the entry is in use, do nothing. */
7993 if (h
->vtable_entries_used
7994 && (rel
->r_offset
- hstart
) < h
->vtable_entries_size
)
7996 bfd_vma entry
= (rel
->r_offset
- hstart
) / file_align
;
7997 if (h
->vtable_entries_used
[entry
])
8000 /* Otherwise, kill it. */
8001 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
8007 /* Do mark and sweep of unused sections. */
8010 elf_gc_sections (abfd
, info
)
8012 struct bfd_link_info
*info
;
8016 asection
* (*gc_mark_hook
)
8017 PARAMS ((asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
8018 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*));
8020 if (!get_elf_backend_data (abfd
)->can_gc_sections
8021 || info
->relocateable
|| info
->emitrelocations
8022 || elf_hash_table (info
)->dynamic_sections_created
)
8025 /* Apply transitive closure to the vtable entry usage info. */
8026 elf_link_hash_traverse (elf_hash_table (info
),
8027 elf_gc_propagate_vtable_entries_used
,
8032 /* Kill the vtable relocations that were not used. */
8033 elf_link_hash_traverse (elf_hash_table (info
),
8034 elf_gc_smash_unused_vtentry_relocs
,
8039 /* Grovel through relocs to find out who stays ... */
8041 gc_mark_hook
= get_elf_backend_data (abfd
)->gc_mark_hook
;
8042 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
8046 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
8049 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
8051 if (o
->flags
& SEC_KEEP
)
8052 if (!elf_gc_mark (info
, o
, gc_mark_hook
))
8057 /* ... and mark SEC_EXCLUDE for those that go. */
8058 if (!elf_gc_sweep (info
, get_elf_backend_data (abfd
)->gc_sweep_hook
))
8064 /* Called from check_relocs to record the existance of a VTINHERIT reloc. */
8067 elf_gc_record_vtinherit (abfd
, sec
, h
, offset
)
8070 struct elf_link_hash_entry
*h
;
8073 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
8074 struct elf_link_hash_entry
**search
, *child
;
8075 bfd_size_type extsymcount
;
8077 /* The sh_info field of the symtab header tells us where the
8078 external symbols start. We don't care about the local symbols at
8080 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/sizeof (Elf_External_Sym
);
8081 if (!elf_bad_symtab (abfd
))
8082 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
8084 sym_hashes
= elf_sym_hashes (abfd
);
8085 sym_hashes_end
= sym_hashes
+ extsymcount
;
8087 /* Hunt down the child symbol, which is in this section at the same
8088 offset as the relocation. */
8089 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
8091 if ((child
= *search
) != NULL
8092 && (child
->root
.type
== bfd_link_hash_defined
8093 || child
->root
.type
== bfd_link_hash_defweak
)
8094 && child
->root
.u
.def
.section
== sec
8095 && child
->root
.u
.def
.value
== offset
)
8099 (*_bfd_error_handler
) ("%s: %s+%lu: No symbol found for INHERIT",
8100 bfd_archive_filename (abfd
), sec
->name
,
8101 (unsigned long) offset
);
8102 bfd_set_error (bfd_error_invalid_operation
);
8108 /* This *should* only be the absolute section. It could potentially
8109 be that someone has defined a non-global vtable though, which
8110 would be bad. It isn't worth paging in the local symbols to be
8111 sure though; that case should simply be handled by the assembler. */
8113 child
->vtable_parent
= (struct elf_link_hash_entry
*) -1;
8116 child
->vtable_parent
= h
;
8121 /* Called from check_relocs to record the existance of a VTENTRY reloc. */
8124 elf_gc_record_vtentry (abfd
, sec
, h
, addend
)
8125 bfd
*abfd ATTRIBUTE_UNUSED
;
8126 asection
*sec ATTRIBUTE_UNUSED
;
8127 struct elf_link_hash_entry
*h
;
8130 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8131 int file_align
= bed
->s
->file_align
;
8133 if (addend
>= h
->vtable_entries_size
)
8136 boolean
*ptr
= h
->vtable_entries_used
;
8138 /* While the symbol is undefined, we have to be prepared to handle
8140 if (h
->root
.type
== bfd_link_hash_undefined
)
8147 /* Oops! We've got a reference past the defined end of
8148 the table. This is probably a bug -- shall we warn? */
8153 /* Allocate one extra entry for use as a "done" flag for the
8154 consolidation pass. */
8155 bytes
= (size
/ file_align
+ 1) * sizeof (boolean
);
8159 ptr
= bfd_realloc (ptr
- 1, (bfd_size_type
) bytes
);
8165 oldbytes
= ((h
->vtable_entries_size
/ file_align
+ 1)
8166 * sizeof (boolean
));
8167 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
8171 ptr
= bfd_zmalloc ((bfd_size_type
) bytes
);
8176 /* And arrange for that done flag to be at index -1. */
8177 h
->vtable_entries_used
= ptr
+ 1;
8178 h
->vtable_entries_size
= size
;
8181 h
->vtable_entries_used
[addend
/ file_align
] = true;
8186 /* And an accompanying bit to work out final got entry offsets once
8187 we're done. Should be called from final_link. */
8190 elf_gc_common_finalize_got_offsets (abfd
, info
)
8192 struct bfd_link_info
*info
;
8195 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8198 /* The GOT offset is relative to the .got section, but the GOT header is
8199 put into the .got.plt section, if the backend uses it. */
8200 if (bed
->want_got_plt
)
8203 gotoff
= bed
->got_header_size
;
8205 /* Do the local .got entries first. */
8206 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
8208 bfd_signed_vma
*local_got
;
8209 bfd_size_type j
, locsymcount
;
8210 Elf_Internal_Shdr
*symtab_hdr
;
8212 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
8215 local_got
= elf_local_got_refcounts (i
);
8219 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
8220 if (elf_bad_symtab (i
))
8221 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
8223 locsymcount
= symtab_hdr
->sh_info
;
8225 for (j
= 0; j
< locsymcount
; ++j
)
8227 if (local_got
[j
] > 0)
8229 local_got
[j
] = gotoff
;
8230 gotoff
+= ARCH_SIZE
/ 8;
8233 local_got
[j
] = (bfd_vma
) -1;
8237 /* Then the global .got entries. .plt refcounts are handled by
8238 adjust_dynamic_symbol */
8239 elf_link_hash_traverse (elf_hash_table (info
),
8240 elf_gc_allocate_got_offsets
,
8245 /* We need a special top-level link routine to convert got reference counts
8246 to real got offsets. */
8249 elf_gc_allocate_got_offsets (h
, offarg
)
8250 struct elf_link_hash_entry
*h
;
8253 bfd_vma
*off
= (bfd_vma
*) offarg
;
8255 if (h
->root
.type
== bfd_link_hash_warning
)
8256 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8258 if (h
->got
.refcount
> 0)
8260 h
->got
.offset
= off
[0];
8261 off
[0] += ARCH_SIZE
/ 8;
8264 h
->got
.offset
= (bfd_vma
) -1;
8269 /* Many folk need no more in the way of final link than this, once
8270 got entry reference counting is enabled. */
8273 elf_gc_common_final_link (abfd
, info
)
8275 struct bfd_link_info
*info
;
8277 if (!elf_gc_common_finalize_got_offsets (abfd
, info
))
8280 /* Invoke the regular ELF backend linker to do all the work. */
8281 return elf_bfd_final_link (abfd
, info
);
8284 /* This function will be called though elf_link_hash_traverse to store
8285 all hash value of the exported symbols in an array. */
8288 elf_collect_hash_codes (h
, data
)
8289 struct elf_link_hash_entry
*h
;
8292 unsigned long **valuep
= (unsigned long **) data
;
8298 if (h
->root
.type
== bfd_link_hash_warning
)
8299 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8301 /* Ignore indirect symbols. These are added by the versioning code. */
8302 if (h
->dynindx
== -1)
8305 name
= h
->root
.root
.string
;
8306 p
= strchr (name
, ELF_VER_CHR
);
8309 alc
= bfd_malloc ((bfd_size_type
) (p
- name
+ 1));
8310 memcpy (alc
, name
, (size_t) (p
- name
));
8311 alc
[p
- name
] = '\0';
8315 /* Compute the hash value. */
8316 ha
= bfd_elf_hash (name
);
8318 /* Store the found hash value in the array given as the argument. */
8321 /* And store it in the struct so that we can put it in the hash table
8323 h
->elf_hash_value
= ha
;
8332 elf_reloc_symbol_deleted_p (offset
, cookie
)
8336 struct elf_reloc_cookie
*rcookie
= (struct elf_reloc_cookie
*) cookie
;
8338 if (rcookie
->bad_symtab
)
8339 rcookie
->rel
= rcookie
->rels
;
8341 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
8343 unsigned long r_symndx
;
8345 if (! rcookie
->bad_symtab
)
8346 if (rcookie
->rel
->r_offset
> offset
)
8348 if (rcookie
->rel
->r_offset
!= offset
)
8351 r_symndx
= ELF_R_SYM (rcookie
->rel
->r_info
);
8352 if (r_symndx
== SHN_UNDEF
)
8355 if (r_symndx
>= rcookie
->locsymcount
8356 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
8358 struct elf_link_hash_entry
*h
;
8360 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
8362 while (h
->root
.type
== bfd_link_hash_indirect
8363 || h
->root
.type
== bfd_link_hash_warning
)
8364 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8366 if ((h
->root
.type
== bfd_link_hash_defined
8367 || h
->root
.type
== bfd_link_hash_defweak
)
8368 && elf_discarded_section (h
->root
.u
.def
.section
))
8375 /* It's not a relocation against a global symbol,
8376 but it could be a relocation against a local
8377 symbol for a discarded section. */
8379 Elf_Internal_Sym
*isym
;
8381 /* Need to: get the symbol; get the section. */
8382 isym
= &rcookie
->locsyms
[r_symndx
];
8383 if (isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
8385 isec
= section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
8386 if (isec
!= NULL
&& elf_discarded_section (isec
))
8395 /* Discard unneeded references to discarded sections.
8396 Returns true if any section's size was changed. */
8397 /* This function assumes that the relocations are in sorted order,
8398 which is true for all known assemblers. */
8401 elf_bfd_discard_info (output_bfd
, info
)
8403 struct bfd_link_info
*info
;
8405 struct elf_reloc_cookie cookie
;
8406 asection
*stab
, *eh
;
8407 Elf_Internal_Shdr
*symtab_hdr
;
8408 struct elf_backend_data
*bed
;
8411 boolean ret
= false;
8413 if (info
->traditional_format
8414 || info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
8415 || ! is_elf_hash_table (info
))
8418 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link_next
)
8420 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
8423 bed
= get_elf_backend_data (abfd
);
8425 if ((abfd
->flags
& DYNAMIC
) != 0)
8428 eh
= bfd_get_section_by_name (abfd
, ".eh_frame");
8430 && (eh
->_raw_size
== 0
8431 || bfd_is_abs_section (eh
->output_section
)))
8434 stab
= bfd_get_section_by_name (abfd
, ".stab");
8436 && (stab
->_raw_size
== 0
8437 || bfd_is_abs_section (stab
->output_section
)
8438 || elf_section_data (stab
)->sec_info_type
!= ELF_INFO_TYPE_STABS
))
8443 && bed
->elf_backend_discard_info
== NULL
)
8446 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
8448 cookie
.sym_hashes
= elf_sym_hashes (abfd
);
8449 cookie
.bad_symtab
= elf_bad_symtab (abfd
);
8450 if (cookie
.bad_symtab
)
8452 cookie
.locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
8453 cookie
.extsymoff
= 0;
8457 cookie
.locsymcount
= symtab_hdr
->sh_info
;
8458 cookie
.extsymoff
= symtab_hdr
->sh_info
;
8461 cookie
.locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
8462 if (cookie
.locsyms
== NULL
&& cookie
.locsymcount
!= 0)
8464 cookie
.locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
8465 cookie
.locsymcount
, 0,
8467 if (cookie
.locsyms
== NULL
)
8474 count
= stab
->reloc_count
;
8476 cookie
.rels
= (NAME(_bfd_elf
,link_read_relocs
)
8477 (abfd
, stab
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
8478 info
->keep_memory
));
8479 if (cookie
.rels
!= NULL
)
8481 cookie
.rel
= cookie
.rels
;
8482 cookie
.relend
= cookie
.rels
;
8483 cookie
.relend
+= count
* bed
->s
->int_rels_per_ext_rel
;
8484 if (_bfd_discard_section_stabs (abfd
, stab
,
8485 elf_section_data (stab
)->sec_info
,
8486 elf_reloc_symbol_deleted_p
,
8489 if (elf_section_data (stab
)->relocs
!= cookie
.rels
)
8497 count
= eh
->reloc_count
;
8499 cookie
.rels
= (NAME(_bfd_elf
,link_read_relocs
)
8500 (abfd
, eh
, (PTR
) NULL
, (Elf_Internal_Rela
*) NULL
,
8501 info
->keep_memory
));
8502 cookie
.rel
= cookie
.rels
;
8503 cookie
.relend
= cookie
.rels
;
8504 if (cookie
.rels
!= NULL
)
8505 cookie
.relend
+= count
* bed
->s
->int_rels_per_ext_rel
;
8507 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, eh
,
8508 elf_reloc_symbol_deleted_p
,
8512 if (cookie
.rels
!= NULL
8513 && elf_section_data (eh
)->relocs
!= cookie
.rels
)
8517 if (bed
->elf_backend_discard_info
!= NULL
8518 && (*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
8521 if (cookie
.locsyms
!= NULL
8522 && symtab_hdr
->contents
!= (unsigned char *) cookie
.locsyms
)
8524 if (! info
->keep_memory
)
8525 free (cookie
.locsyms
);
8527 symtab_hdr
->contents
= (unsigned char *) cookie
.locsyms
;
8531 if (info
->eh_frame_hdr
8532 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
8539 elf_section_ignore_discarded_relocs (sec
)
8542 struct elf_backend_data
*bed
;
8544 switch (elf_section_data (sec
)->sec_info_type
)
8546 case ELF_INFO_TYPE_STABS
:
8547 case ELF_INFO_TYPE_EH_FRAME
:
8553 bed
= get_elf_backend_data (sec
->owner
);
8554 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
8555 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))