2 Copyright 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /* ELF linker code. */
22 /* This struct is used to pass information to routines called via
23 elf_link_hash_traverse which must return failure. */
25 struct elf_info_failed
28 struct bfd_link_info
*info
;
31 static boolean elf_link_add_object_symbols
32 PARAMS ((bfd
*, struct bfd_link_info
*));
33 static boolean elf_link_add_archive_symbols
34 PARAMS ((bfd
*, struct bfd_link_info
*));
35 static boolean elf_merge_symbol
36 PARAMS ((bfd
*, struct bfd_link_info
*, const char *, Elf_Internal_Sym
*,
37 asection
**, bfd_vma
*, struct elf_link_hash_entry
**,
38 boolean
*, boolean
*, boolean
*));
39 static boolean elf_export_symbol
40 PARAMS ((struct elf_link_hash_entry
*, PTR
));
41 static boolean elf_fix_symbol_flags
42 PARAMS ((struct elf_link_hash_entry
*, struct elf_info_failed
*));
43 static boolean elf_adjust_dynamic_symbol
44 PARAMS ((struct elf_link_hash_entry
*, PTR
));
45 static boolean elf_link_find_version_dependencies
46 PARAMS ((struct elf_link_hash_entry
*, PTR
));
47 static boolean elf_link_find_version_dependencies
48 PARAMS ((struct elf_link_hash_entry
*, PTR
));
49 static boolean elf_link_assign_sym_version
50 PARAMS ((struct elf_link_hash_entry
*, PTR
));
51 static boolean elf_collect_hash_codes
52 PARAMS ((struct elf_link_hash_entry
*, PTR
));
53 static boolean elf_link_read_relocs_from_section
54 PARAMS ((bfd
*, Elf_Internal_Shdr
*, PTR
, Elf_Internal_Rela
*));
55 static void elf_link_output_relocs
56 PARAMS ((bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*));
57 static boolean elf_link_size_reloc_section
58 PARAMS ((bfd
*, Elf_Internal_Shdr
*, asection
*));
59 static void elf_link_adjust_relocs
60 PARAMS ((bfd
*, Elf_Internal_Shdr
*, unsigned int,
61 struct elf_link_hash_entry
**));
63 /* Given an ELF BFD, add symbols to the global hash table as
67 elf_bfd_link_add_symbols (abfd
, info
)
69 struct bfd_link_info
*info
;
71 switch (bfd_get_format (abfd
))
74 return elf_link_add_object_symbols (abfd
, info
);
76 return elf_link_add_archive_symbols (abfd
, info
);
78 bfd_set_error (bfd_error_wrong_format
);
83 /* Return true iff this is a non-common definition of a symbol. */
85 is_global_symbol_definition (abfd
, sym
)
86 bfd
* abfd ATTRIBUTE_UNUSED
;
87 Elf_Internal_Sym
* sym
;
89 /* Local symbols do not count, but target specific ones might. */
90 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
91 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
94 /* If the section is undefined, then so is the symbol. */
95 if (sym
->st_shndx
== SHN_UNDEF
)
98 /* If the symbol is defined in the common section, then
99 it is a common definition and so does not count. */
100 if (sym
->st_shndx
== SHN_COMMON
)
103 /* If the symbol is in a target specific section then we
104 must rely upon the backend to tell us what it is. */
105 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
106 /* FIXME - this function is not coded yet:
108 return _bfd_is_global_symbol_definition (abfd, sym);
110 Instead for now assume that the definition is not global,
111 Even if this is wrong, at least the linker will behave
112 in the same way that it used to do. */
119 /* Search the symbol table of the archive element of the archive ABFD
120 whoes archove map contains a mention of SYMDEF, and determine if
121 the symbol is defined in this element. */
123 elf_link_is_defined_archive_symbol (abfd
, symdef
)
127 Elf_Internal_Shdr
* hdr
;
128 Elf_External_Sym
* esym
;
129 Elf_External_Sym
* esymend
;
130 Elf_External_Sym
* buf
= NULL
;
134 boolean result
= false;
136 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
137 if (abfd
== (bfd
*) NULL
)
140 if (! bfd_check_format (abfd
, bfd_object
))
143 /* If we have already included the element containing this symbol in the
144 link then we do not need to include it again. Just claim that any symbol
145 it contains is not a definition, so that our caller will not decide to
146 (re)include this element. */
147 if (abfd
->archive_pass
)
150 /* Select the appropriate symbol table. */
151 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
152 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
154 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
156 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
158 /* The sh_info field of the symtab header tells us where the
159 external symbols start. We don't care about the local symbols. */
160 if (elf_bad_symtab (abfd
))
162 extsymcount
= symcount
;
167 extsymcount
= symcount
- hdr
->sh_info
;
168 extsymoff
= hdr
->sh_info
;
171 buf
= ((Elf_External_Sym
*)
172 bfd_malloc (extsymcount
* sizeof (Elf_External_Sym
)));
173 if (buf
== NULL
&& extsymcount
!= 0)
176 /* Read in the symbol table.
177 FIXME: This ought to be cached somewhere. */
179 hdr
->sh_offset
+ extsymoff
* sizeof (Elf_External_Sym
),
181 || (bfd_read ((PTR
) buf
, sizeof (Elf_External_Sym
), extsymcount
, abfd
)
182 != extsymcount
* sizeof (Elf_External_Sym
)))
188 /* Scan the symbol table looking for SYMDEF. */
189 esymend
= buf
+ extsymcount
;
194 Elf_Internal_Sym sym
;
197 elf_swap_symbol_in (abfd
, esym
, & sym
);
199 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
, sym
.st_name
);
200 if (name
== (const char *) NULL
)
203 if (strcmp (name
, symdef
->name
) == 0)
205 result
= is_global_symbol_definition (abfd
, & sym
);
216 /* Add symbols from an ELF archive file to the linker hash table. We
217 don't use _bfd_generic_link_add_archive_symbols because of a
218 problem which arises on UnixWare. The UnixWare libc.so is an
219 archive which includes an entry libc.so.1 which defines a bunch of
220 symbols. The libc.so archive also includes a number of other
221 object files, which also define symbols, some of which are the same
222 as those defined in libc.so.1. Correct linking requires that we
223 consider each object file in turn, and include it if it defines any
224 symbols we need. _bfd_generic_link_add_archive_symbols does not do
225 this; it looks through the list of undefined symbols, and includes
226 any object file which defines them. When this algorithm is used on
227 UnixWare, it winds up pulling in libc.so.1 early and defining a
228 bunch of symbols. This means that some of the other objects in the
229 archive are not included in the link, which is incorrect since they
230 precede libc.so.1 in the archive.
232 Fortunately, ELF archive handling is simpler than that done by
233 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
234 oddities. In ELF, if we find a symbol in the archive map, and the
235 symbol is currently undefined, we know that we must pull in that
238 Unfortunately, we do have to make multiple passes over the symbol
239 table until nothing further is resolved. */
242 elf_link_add_archive_symbols (abfd
, info
)
244 struct bfd_link_info
*info
;
247 boolean
*defined
= NULL
;
248 boolean
*included
= NULL
;
252 if (! bfd_has_map (abfd
))
254 /* An empty archive is a special case. */
255 if (bfd_openr_next_archived_file (abfd
, (bfd
*) NULL
) == NULL
)
257 bfd_set_error (bfd_error_no_armap
);
261 /* Keep track of all symbols we know to be already defined, and all
262 files we know to be already included. This is to speed up the
263 second and subsequent passes. */
264 c
= bfd_ardata (abfd
)->symdef_count
;
267 defined
= (boolean
*) bfd_malloc (c
* sizeof (boolean
));
268 included
= (boolean
*) bfd_malloc (c
* sizeof (boolean
));
269 if (defined
== (boolean
*) NULL
|| included
== (boolean
*) NULL
)
271 memset (defined
, 0, c
* sizeof (boolean
));
272 memset (included
, 0, c
* sizeof (boolean
));
274 symdefs
= bfd_ardata (abfd
)->symdefs
;
287 symdefend
= symdef
+ c
;
288 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
290 struct elf_link_hash_entry
*h
;
292 struct bfd_link_hash_entry
*undefs_tail
;
295 if (defined
[i
] || included
[i
])
297 if (symdef
->file_offset
== last
)
303 h
= elf_link_hash_lookup (elf_hash_table (info
), symdef
->name
,
304 false, false, false);
310 /* If this is a default version (the name contains @@),
311 look up the symbol again without the version. The
312 effect is that references to the symbol without the
313 version will be matched by the default symbol in the
316 p
= strchr (symdef
->name
, ELF_VER_CHR
);
317 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
320 copy
= bfd_alloc (abfd
, p
- symdef
->name
+ 1);
323 memcpy (copy
, symdef
->name
, p
- symdef
->name
);
324 copy
[p
- symdef
->name
] = '\0';
326 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
327 false, false, false);
329 bfd_release (abfd
, copy
);
335 if (h
->root
.type
== bfd_link_hash_common
)
337 /* We currently have a common symbol. The archive map contains
338 a reference to this symbol, so we may want to include it. We
339 only want to include it however, if this archive element
340 contains a definition of the symbol, not just another common
343 Unfortunately some archivers (including GNU ar) will put
344 declarations of common symbols into their archive maps, as
345 well as real definitions, so we cannot just go by the archive
346 map alone. Instead we must read in the element's symbol
347 table and check that to see what kind of symbol definition
349 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
352 else if (h
->root
.type
!= bfd_link_hash_undefined
)
354 if (h
->root
.type
!= bfd_link_hash_undefweak
)
359 /* We need to include this archive member. */
360 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
361 if (element
== (bfd
*) NULL
)
364 if (! bfd_check_format (element
, bfd_object
))
367 /* Doublecheck that we have not included this object
368 already--it should be impossible, but there may be
369 something wrong with the archive. */
370 if (element
->archive_pass
!= 0)
372 bfd_set_error (bfd_error_bad_value
);
375 element
->archive_pass
= 1;
377 undefs_tail
= info
->hash
->undefs_tail
;
379 if (! (*info
->callbacks
->add_archive_element
) (info
, element
,
382 if (! elf_link_add_object_symbols (element
, info
))
385 /* If there are any new undefined symbols, we need to make
386 another pass through the archive in order to see whether
387 they can be defined. FIXME: This isn't perfect, because
388 common symbols wind up on undefs_tail and because an
389 undefined symbol which is defined later on in this pass
390 does not require another pass. This isn't a bug, but it
391 does make the code less efficient than it could be. */
392 if (undefs_tail
!= info
->hash
->undefs_tail
)
395 /* Look backward to mark all symbols from this object file
396 which we have already seen in this pass. */
400 included
[mark
] = true;
405 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
407 /* We mark subsequent symbols from this object file as we go
408 on through the loop. */
409 last
= symdef
->file_offset
;
420 if (defined
!= (boolean
*) NULL
)
422 if (included
!= (boolean
*) NULL
)
427 /* This function is called when we want to define a new symbol. It
428 handles the various cases which arise when we find a definition in
429 a dynamic object, or when there is already a definition in a
430 dynamic object. The new symbol is described by NAME, SYM, PSEC,
431 and PVALUE. We set SYM_HASH to the hash table entry. We set
432 OVERRIDE if the old symbol is overriding a new definition. We set
433 TYPE_CHANGE_OK if it is OK for the type to change. We set
434 SIZE_CHANGE_OK if it is OK for the size to change. By OK to
435 change, we mean that we shouldn't warn if the type or size does
439 elf_merge_symbol (abfd
, info
, name
, sym
, psec
, pvalue
, sym_hash
,
440 override
, type_change_ok
, size_change_ok
)
442 struct bfd_link_info
*info
;
444 Elf_Internal_Sym
*sym
;
447 struct elf_link_hash_entry
**sym_hash
;
449 boolean
*type_change_ok
;
450 boolean
*size_change_ok
;
453 struct elf_link_hash_entry
*h
;
456 boolean newdyn
, olddyn
, olddef
, newdef
, newdyncommon
, olddyncommon
;
461 bind
= ELF_ST_BIND (sym
->st_info
);
463 if (! bfd_is_und_section (sec
))
464 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, true, false, false);
466 h
= ((struct elf_link_hash_entry
*)
467 bfd_wrapped_link_hash_lookup (abfd
, info
, name
, true, false, false));
472 /* This code is for coping with dynamic objects, and is only useful
473 if we are doing an ELF link. */
474 if (info
->hash
->creator
!= abfd
->xvec
)
477 /* For merging, we only care about real symbols. */
479 while (h
->root
.type
== bfd_link_hash_indirect
480 || h
->root
.type
== bfd_link_hash_warning
)
481 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
483 /* If we just created the symbol, mark it as being an ELF symbol.
484 Other than that, there is nothing to do--there is no merge issue
485 with a newly defined symbol--so we just return. */
487 if (h
->root
.type
== bfd_link_hash_new
)
489 h
->elf_link_hash_flags
&=~ ELF_LINK_NON_ELF
;
493 /* OLDBFD is a BFD associated with the existing symbol. */
495 switch (h
->root
.type
)
501 case bfd_link_hash_undefined
:
502 case bfd_link_hash_undefweak
:
503 oldbfd
= h
->root
.u
.undef
.abfd
;
506 case bfd_link_hash_defined
:
507 case bfd_link_hash_defweak
:
508 oldbfd
= h
->root
.u
.def
.section
->owner
;
511 case bfd_link_hash_common
:
512 oldbfd
= h
->root
.u
.c
.p
->section
->owner
;
516 /* In cases involving weak versioned symbols, we may wind up trying
517 to merge a symbol with itself. Catch that here, to avoid the
518 confusion that results if we try to override a symbol with
519 itself. The additional tests catch cases like
520 _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
521 dynamic object, which we do want to handle here. */
523 && ((abfd
->flags
& DYNAMIC
) == 0
524 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0))
527 /* NEWDYN and OLDDYN indicate whether the new or old symbol,
528 respectively, is from a dynamic object. */
530 if ((abfd
->flags
& DYNAMIC
) != 0)
536 olddyn
= (oldbfd
->flags
& DYNAMIC
) != 0;
541 /* This code handles the special SHN_MIPS_{TEXT,DATA} section
542 indices used by MIPS ELF. */
543 switch (h
->root
.type
)
549 case bfd_link_hash_defined
:
550 case bfd_link_hash_defweak
:
551 hsec
= h
->root
.u
.def
.section
;
554 case bfd_link_hash_common
:
555 hsec
= h
->root
.u
.c
.p
->section
;
562 olddyn
= (hsec
->symbol
->flags
& BSF_DYNAMIC
) != 0;
565 /* NEWDEF and OLDDEF indicate whether the new or old symbol,
566 respectively, appear to be a definition rather than reference. */
568 if (bfd_is_und_section (sec
) || bfd_is_com_section (sec
))
573 if (h
->root
.type
== bfd_link_hash_undefined
574 || h
->root
.type
== bfd_link_hash_undefweak
575 || h
->root
.type
== bfd_link_hash_common
)
580 /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
581 symbol, respectively, appears to be a common symbol in a dynamic
582 object. If a symbol appears in an uninitialized section, and is
583 not weak, and is not a function, then it may be a common symbol
584 which was resolved when the dynamic object was created. We want
585 to treat such symbols specially, because they raise special
586 considerations when setting the symbol size: if the symbol
587 appears as a common symbol in a regular object, and the size in
588 the regular object is larger, we must make sure that we use the
589 larger size. This problematic case can always be avoided in C,
590 but it must be handled correctly when using Fortran shared
593 Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
594 likewise for OLDDYNCOMMON and OLDDEF.
596 Note that this test is just a heuristic, and that it is quite
597 possible to have an uninitialized symbol in a shared object which
598 is really a definition, rather than a common symbol. This could
599 lead to some minor confusion when the symbol really is a common
600 symbol in some regular object. However, I think it will be
605 && (sec
->flags
& SEC_ALLOC
) != 0
606 && (sec
->flags
& SEC_LOAD
) == 0
609 && ELF_ST_TYPE (sym
->st_info
) != STT_FUNC
)
612 newdyncommon
= false;
616 && h
->root
.type
== bfd_link_hash_defined
617 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
618 && (h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0
619 && (h
->root
.u
.def
.section
->flags
& SEC_LOAD
) == 0
621 && h
->type
!= STT_FUNC
)
624 olddyncommon
= false;
626 /* It's OK to change the type if either the existing symbol or the
627 new symbol is weak. */
629 if (h
->root
.type
== bfd_link_hash_defweak
630 || h
->root
.type
== bfd_link_hash_undefweak
632 *type_change_ok
= true;
634 /* It's OK to change the size if either the existing symbol or the
635 new symbol is weak, or if the old symbol is undefined. */
638 || h
->root
.type
== bfd_link_hash_undefined
)
639 *size_change_ok
= true;
641 /* If both the old and the new symbols look like common symbols in a
642 dynamic object, set the size of the symbol to the larger of the
647 && sym
->st_size
!= h
->size
)
649 /* Since we think we have two common symbols, issue a multiple
650 common warning if desired. Note that we only warn if the
651 size is different. If the size is the same, we simply let
652 the old symbol override the new one as normally happens with
653 symbols defined in dynamic objects. */
655 if (! ((*info
->callbacks
->multiple_common
)
656 (info
, h
->root
.root
.string
, oldbfd
, bfd_link_hash_common
,
657 h
->size
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
660 if (sym
->st_size
> h
->size
)
661 h
->size
= sym
->st_size
;
663 *size_change_ok
= true;
666 /* If we are looking at a dynamic object, and we have found a
667 definition, we need to see if the symbol was already defined by
668 some other object. If so, we want to use the existing
669 definition, and we do not want to report a multiple symbol
670 definition error; we do this by clobbering *PSEC to be
673 We treat a common symbol as a definition if the symbol in the
674 shared library is a function, since common symbols always
675 represent variables; this can cause confusion in principle, but
676 any such confusion would seem to indicate an erroneous program or
677 shared library. We also permit a common symbol in a regular
678 object to override a weak symbol in a shared object.
680 We prefer a non-weak definition in a shared library to a weak
681 definition in the executable. */
686 || (h
->root
.type
== bfd_link_hash_common
688 || ELF_ST_TYPE (sym
->st_info
) == STT_FUNC
)))
689 && (h
->root
.type
!= bfd_link_hash_defweak
690 || bind
== STB_WEAK
))
694 newdyncommon
= false;
696 *psec
= sec
= bfd_und_section_ptr
;
697 *size_change_ok
= true;
699 /* If we get here when the old symbol is a common symbol, then
700 we are explicitly letting it override a weak symbol or
701 function in a dynamic object, and we don't want to warn about
702 a type change. If the old symbol is a defined symbol, a type
703 change warning may still be appropriate. */
705 if (h
->root
.type
== bfd_link_hash_common
)
706 *type_change_ok
= true;
709 /* Handle the special case of an old common symbol merging with a
710 new symbol which looks like a common symbol in a shared object.
711 We change *PSEC and *PVALUE to make the new symbol look like a
712 common symbol, and let _bfd_generic_link_add_one_symbol will do
716 && h
->root
.type
== bfd_link_hash_common
)
720 newdyncommon
= false;
721 *pvalue
= sym
->st_size
;
722 *psec
= sec
= bfd_com_section_ptr
;
723 *size_change_ok
= true;
726 /* If the old symbol is from a dynamic object, and the new symbol is
727 a definition which is not from a dynamic object, then the new
728 symbol overrides the old symbol. Symbols from regular files
729 always take precedence over symbols from dynamic objects, even if
730 they are defined after the dynamic object in the link.
732 As above, we again permit a common symbol in a regular object to
733 override a definition in a shared object if the shared object
734 symbol is a function or is weak.
736 As above, we permit a non-weak definition in a shared object to
737 override a weak definition in a regular object. */
741 || (bfd_is_com_section (sec
)
742 && (h
->root
.type
== bfd_link_hash_defweak
743 || h
->type
== STT_FUNC
)))
746 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
748 || h
->root
.type
== bfd_link_hash_defweak
))
750 /* Change the hash table entry to undefined, and let
751 _bfd_generic_link_add_one_symbol do the right thing with the
754 h
->root
.type
= bfd_link_hash_undefined
;
755 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
756 *size_change_ok
= true;
759 olddyncommon
= false;
761 /* We again permit a type change when a common symbol may be
762 overriding a function. */
764 if (bfd_is_com_section (sec
))
765 *type_change_ok
= true;
767 /* This union may have been set to be non-NULL when this symbol
768 was seen in a dynamic object. We must force the union to be
769 NULL, so that it is correct for a regular symbol. */
771 h
->verinfo
.vertree
= NULL
;
773 /* In this special case, if H is the target of an indirection,
774 we want the caller to frob with H rather than with the
775 indirect symbol. That will permit the caller to redefine the
776 target of the indirection, rather than the indirect symbol
777 itself. FIXME: This will break the -y option if we store a
778 symbol with a different name. */
782 /* Handle the special case of a new common symbol merging with an
783 old symbol that looks like it might be a common symbol defined in
784 a shared object. Note that we have already handled the case in
785 which a new common symbol should simply override the definition
786 in the shared library. */
789 && bfd_is_com_section (sec
)
792 /* It would be best if we could set the hash table entry to a
793 common symbol, but we don't know what to use for the section
795 if (! ((*info
->callbacks
->multiple_common
)
796 (info
, h
->root
.root
.string
, oldbfd
, bfd_link_hash_common
,
797 h
->size
, abfd
, bfd_link_hash_common
, sym
->st_size
)))
800 /* If the predumed common symbol in the dynamic object is
801 larger, pretend that the new symbol has its size. */
803 if (h
->size
> *pvalue
)
806 /* FIXME: We no longer know the alignment required by the symbol
807 in the dynamic object, so we just wind up using the one from
808 the regular object. */
811 olddyncommon
= false;
813 h
->root
.type
= bfd_link_hash_undefined
;
814 h
->root
.u
.undef
.abfd
= h
->root
.u
.def
.section
->owner
;
816 *size_change_ok
= true;
817 *type_change_ok
= true;
819 h
->verinfo
.vertree
= NULL
;
822 /* Handle the special case of a weak definition in a regular object
823 followed by a non-weak definition in a shared object. In this
824 case, we prefer the definition in the shared object. */
826 && h
->root
.type
== bfd_link_hash_defweak
831 /* To make this work we have to frob the flags so that the rest
832 of the code does not think we are using the regular
834 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
835 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
836 else if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0)
837 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_DYNAMIC
;
838 h
->elf_link_hash_flags
&= ~ (ELF_LINK_HASH_DEF_REGULAR
839 | ELF_LINK_HASH_DEF_DYNAMIC
);
841 /* If H is the target of an indirection, we want the caller to
842 use H rather than the indirect symbol. Otherwise if we are
843 defining a new indirect symbol we will wind up attaching it
844 to the entry we are overriding. */
848 /* Handle the special case of a non-weak definition in a shared
849 object followed by a weak definition in a regular object. In
850 this case we prefer to definition in the shared object. To make
851 this work we have to tell the caller to not treat the new symbol
855 && h
->root
.type
!= bfd_link_hash_defweak
864 /* Add symbols from an ELF object file to the linker hash table. */
867 elf_link_add_object_symbols (abfd
, info
)
869 struct bfd_link_info
*info
;
871 boolean (*add_symbol_hook
) PARAMS ((bfd
*, struct bfd_link_info
*,
872 const Elf_Internal_Sym
*,
873 const char **, flagword
*,
874 asection
**, bfd_vma
*));
875 boolean (*check_relocs
) PARAMS ((bfd
*, struct bfd_link_info
*,
876 asection
*, const Elf_Internal_Rela
*));
878 Elf_Internal_Shdr
*hdr
;
882 Elf_External_Sym
*buf
= NULL
;
883 struct elf_link_hash_entry
**sym_hash
;
885 bfd_byte
*dynver
= NULL
;
886 Elf_External_Versym
*extversym
= NULL
;
887 Elf_External_Versym
*ever
;
888 Elf_External_Dyn
*dynbuf
= NULL
;
889 struct elf_link_hash_entry
*weaks
;
890 Elf_External_Sym
*esym
;
891 Elf_External_Sym
*esymend
;
892 struct elf_backend_data
*bed
;
895 bed
= get_elf_backend_data (abfd
);
896 add_symbol_hook
= bed
->elf_add_symbol_hook
;
897 collect
= bed
->collect
;
899 if ((abfd
->flags
& DYNAMIC
) == 0)
905 /* You can't use -r against a dynamic object. Also, there's no
906 hope of using a dynamic object which does not exactly match
907 the format of the output file. */
908 if (info
->relocateable
|| info
->hash
->creator
!= abfd
->xvec
)
910 bfd_set_error (bfd_error_invalid_operation
);
915 /* As a GNU extension, any input sections which are named
916 .gnu.warning.SYMBOL are treated as warning symbols for the given
917 symbol. This differs from .gnu.warning sections, which generate
918 warnings when they are included in an output file. */
923 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
927 name
= bfd_get_section_name (abfd
, s
);
928 if (strncmp (name
, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0)
933 name
+= sizeof ".gnu.warning." - 1;
935 /* If this is a shared object, then look up the symbol
936 in the hash table. If it is there, and it is already
937 been defined, then we will not be using the entry
938 from this shared object, so we don't need to warn.
939 FIXME: If we see the definition in a regular object
940 later on, we will warn, but we shouldn't. The only
941 fix is to keep track of what warnings we are supposed
942 to emit, and then handle them all at the end of the
944 if (dynamic
&& abfd
->xvec
== info
->hash
->creator
)
946 struct elf_link_hash_entry
*h
;
948 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
951 /* FIXME: What about bfd_link_hash_common? */
953 && (h
->root
.type
== bfd_link_hash_defined
954 || h
->root
.type
== bfd_link_hash_defweak
))
956 /* We don't want to issue this warning. Clobber
957 the section size so that the warning does not
958 get copied into the output file. */
964 sz
= bfd_section_size (abfd
, s
);
965 msg
= (char *) bfd_alloc (abfd
, sz
+ 1);
969 if (! bfd_get_section_contents (abfd
, s
, msg
, (file_ptr
) 0, sz
))
974 if (! (_bfd_generic_link_add_one_symbol
975 (info
, abfd
, name
, BSF_WARNING
, s
, (bfd_vma
) 0, msg
,
976 false, collect
, (struct bfd_link_hash_entry
**) NULL
)))
979 if (! info
->relocateable
)
981 /* Clobber the section size so that the warning does
982 not get copied into the output file. */
989 /* If this is a dynamic object, we always link against the .dynsym
990 symbol table, not the .symtab symbol table. The dynamic linker
991 will only see the .dynsym symbol table, so there is no reason to
992 look at .symtab for a dynamic object. */
994 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
995 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
997 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1001 /* Read in any version definitions. */
1003 if (! _bfd_elf_slurp_version_tables (abfd
))
1006 /* Read in the symbol versions, but don't bother to convert them
1007 to internal format. */
1008 if (elf_dynversym (abfd
) != 0)
1010 Elf_Internal_Shdr
*versymhdr
;
1012 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
1013 extversym
= (Elf_External_Versym
*) bfd_malloc (hdr
->sh_size
);
1014 if (extversym
== NULL
)
1016 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
1017 || (bfd_read ((PTR
) extversym
, 1, versymhdr
->sh_size
, abfd
)
1018 != versymhdr
->sh_size
))
1023 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
1025 /* The sh_info field of the symtab header tells us where the
1026 external symbols start. We don't care about the local symbols at
1028 if (elf_bad_symtab (abfd
))
1030 extsymcount
= symcount
;
1035 extsymcount
= symcount
- hdr
->sh_info
;
1036 extsymoff
= hdr
->sh_info
;
1039 buf
= ((Elf_External_Sym
*)
1040 bfd_malloc (extsymcount
* sizeof (Elf_External_Sym
)));
1041 if (buf
== NULL
&& extsymcount
!= 0)
1044 /* We store a pointer to the hash table entry for each external
1046 sym_hash
= ((struct elf_link_hash_entry
**)
1048 extsymcount
* sizeof (struct elf_link_hash_entry
*)));
1049 if (sym_hash
== NULL
)
1051 elf_sym_hashes (abfd
) = sym_hash
;
1057 /* If we are creating a shared library, create all the dynamic
1058 sections immediately. We need to attach them to something,
1059 so we attach them to this BFD, provided it is the right
1060 format. FIXME: If there are no input BFD's of the same
1061 format as the output, we can't make a shared library. */
1063 && ! elf_hash_table (info
)->dynamic_sections_created
1064 && abfd
->xvec
== info
->hash
->creator
)
1066 if (! elf_link_create_dynamic_sections (abfd
, info
))
1075 bfd_size_type oldsize
;
1076 bfd_size_type strindex
;
1078 /* Find the name to use in a DT_NEEDED entry that refers to this
1079 object. If the object has a DT_SONAME entry, we use it.
1080 Otherwise, if the generic linker stuck something in
1081 elf_dt_name, we use that. Otherwise, we just use the file
1082 name. If the generic linker put a null string into
1083 elf_dt_name, we don't make a DT_NEEDED entry at all, even if
1084 there is a DT_SONAME entry. */
1086 name
= bfd_get_filename (abfd
);
1087 if (elf_dt_name (abfd
) != NULL
)
1089 name
= elf_dt_name (abfd
);
1092 if (elf_dt_soname (abfd
) != NULL
)
1098 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1101 Elf_External_Dyn
*extdyn
;
1102 Elf_External_Dyn
*extdynend
;
1106 dynbuf
= (Elf_External_Dyn
*) bfd_malloc ((size_t) s
->_raw_size
);
1110 if (! bfd_get_section_contents (abfd
, s
, (PTR
) dynbuf
,
1111 (file_ptr
) 0, s
->_raw_size
))
1114 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1117 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1120 /* The shared libraries distributed with hpux11 have a bogus
1121 sh_link field for the ".dynamic" section. This code detects
1122 when LINK refers to a section that is not a string table and
1123 tries to find the string table for the ".dynsym" section
1125 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[link
];
1126 if (hdr
->sh_type
!= SHT_STRTAB
)
1128 asection
*s
= bfd_get_section_by_name (abfd
, ".dynsym");
1129 int elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1132 link
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1137 extdynend
= extdyn
+ s
->_raw_size
/ sizeof (Elf_External_Dyn
);
1138 for (; extdyn
< extdynend
; extdyn
++)
1140 Elf_Internal_Dyn dyn
;
1142 elf_swap_dyn_in (abfd
, extdyn
, &dyn
);
1143 if (dyn
.d_tag
== DT_SONAME
)
1145 name
= bfd_elf_string_from_elf_section (abfd
, link
,
1150 if (dyn
.d_tag
== DT_NEEDED
)
1152 struct bfd_link_needed_list
*n
, **pn
;
1155 n
= ((struct bfd_link_needed_list
*)
1156 bfd_alloc (abfd
, sizeof (struct bfd_link_needed_list
)));
1157 fnm
= bfd_elf_string_from_elf_section (abfd
, link
,
1159 if (n
== NULL
|| fnm
== NULL
)
1161 anm
= bfd_alloc (abfd
, strlen (fnm
) + 1);
1168 for (pn
= &elf_hash_table (info
)->needed
;
1180 /* We do not want to include any of the sections in a dynamic
1181 object in the output file. We hack by simply clobbering the
1182 list of sections in the BFD. This could be handled more
1183 cleanly by, say, a new section flag; the existing
1184 SEC_NEVER_LOAD flag is not the one we want, because that one
1185 still implies that the section takes up space in the output
1187 abfd
->sections
= NULL
;
1188 abfd
->section_count
= 0;
1190 /* If this is the first dynamic object found in the link, create
1191 the special sections required for dynamic linking. */
1192 if (! elf_hash_table (info
)->dynamic_sections_created
)
1194 if (! elf_link_create_dynamic_sections (abfd
, info
))
1200 /* Add a DT_NEEDED entry for this dynamic object. */
1201 oldsize
= _bfd_stringtab_size (elf_hash_table (info
)->dynstr
);
1202 strindex
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
, name
,
1204 if (strindex
== (bfd_size_type
) -1)
1207 if (oldsize
== _bfd_stringtab_size (elf_hash_table (info
)->dynstr
))
1210 Elf_External_Dyn
*dyncon
, *dynconend
;
1212 /* The hash table size did not change, which means that
1213 the dynamic object name was already entered. If we
1214 have already included this dynamic object in the
1215 link, just ignore it. There is no reason to include
1216 a particular dynamic object more than once. */
1217 sdyn
= bfd_get_section_by_name (elf_hash_table (info
)->dynobj
,
1219 BFD_ASSERT (sdyn
!= NULL
);
1221 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
1222 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
1224 for (; dyncon
< dynconend
; dyncon
++)
1226 Elf_Internal_Dyn dyn
;
1228 elf_swap_dyn_in (elf_hash_table (info
)->dynobj
, dyncon
,
1230 if (dyn
.d_tag
== DT_NEEDED
1231 && dyn
.d_un
.d_val
== strindex
)
1235 if (extversym
!= NULL
)
1242 if (! elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
1246 /* Save the SONAME, if there is one, because sometimes the
1247 linker emulation code will need to know it. */
1249 name
= bfd_get_filename (abfd
);
1250 elf_dt_name (abfd
) = name
;
1254 hdr
->sh_offset
+ extsymoff
* sizeof (Elf_External_Sym
),
1256 || (bfd_read ((PTR
) buf
, sizeof (Elf_External_Sym
), extsymcount
, abfd
)
1257 != extsymcount
* sizeof (Elf_External_Sym
)))
1262 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
1263 esymend
= buf
+ extsymcount
;
1266 esym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
1268 Elf_Internal_Sym sym
;
1274 struct elf_link_hash_entry
*h
;
1276 boolean size_change_ok
, type_change_ok
;
1277 boolean new_weakdef
;
1278 unsigned int old_alignment
;
1280 elf_swap_symbol_in (abfd
, esym
, &sym
);
1282 flags
= BSF_NO_FLAGS
;
1284 value
= sym
.st_value
;
1287 bind
= ELF_ST_BIND (sym
.st_info
);
1288 if (bind
== STB_LOCAL
)
1290 /* This should be impossible, since ELF requires that all
1291 global symbols follow all local symbols, and that sh_info
1292 point to the first global symbol. Unfortunatealy, Irix 5
1296 else if (bind
== STB_GLOBAL
)
1298 if (sym
.st_shndx
!= SHN_UNDEF
1299 && sym
.st_shndx
!= SHN_COMMON
)
1304 else if (bind
== STB_WEAK
)
1308 /* Leave it up to the processor backend. */
1311 if (sym
.st_shndx
== SHN_UNDEF
)
1312 sec
= bfd_und_section_ptr
;
1313 else if (sym
.st_shndx
> 0 && sym
.st_shndx
< SHN_LORESERVE
)
1315 sec
= section_from_elf_index (abfd
, sym
.st_shndx
);
1317 sec
= bfd_abs_section_ptr
;
1318 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
1321 else if (sym
.st_shndx
== SHN_ABS
)
1322 sec
= bfd_abs_section_ptr
;
1323 else if (sym
.st_shndx
== SHN_COMMON
)
1325 sec
= bfd_com_section_ptr
;
1326 /* What ELF calls the size we call the value. What ELF
1327 calls the value we call the alignment. */
1328 value
= sym
.st_size
;
1332 /* Leave it up to the processor backend. */
1335 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
, sym
.st_name
);
1336 if (name
== (const char *) NULL
)
1339 if (add_symbol_hook
)
1341 if (! (*add_symbol_hook
) (abfd
, info
, &sym
, &name
, &flags
, &sec
,
1345 /* The hook function sets the name to NULL if this symbol
1346 should be skipped for some reason. */
1347 if (name
== (const char *) NULL
)
1351 /* Sanity check that all possibilities were handled. */
1352 if (sec
== (asection
*) NULL
)
1354 bfd_set_error (bfd_error_bad_value
);
1358 if (bfd_is_und_section (sec
)
1359 || bfd_is_com_section (sec
))
1364 size_change_ok
= false;
1365 type_change_ok
= get_elf_backend_data (abfd
)->type_change_ok
;
1367 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1369 Elf_Internal_Versym iver
;
1370 unsigned int vernum
= 0;
1375 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
1376 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
1378 /* If this is a hidden symbol, or if it is not version
1379 1, we append the version name to the symbol name.
1380 However, we do not modify a non-hidden absolute
1381 symbol, because it might be the version symbol
1382 itself. FIXME: What if it isn't? */
1383 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
1384 || (vernum
> 1 && ! bfd_is_abs_section (sec
)))
1387 int namelen
, newlen
;
1390 if (sym
.st_shndx
!= SHN_UNDEF
)
1392 if (vernum
> elf_tdata (abfd
)->dynverdef_hdr
.sh_info
)
1394 (*_bfd_error_handler
)
1395 (_("%s: %s: invalid version %u (max %d)"),
1396 bfd_get_filename (abfd
), name
, vernum
,
1397 elf_tdata (abfd
)->dynverdef_hdr
.sh_info
);
1398 bfd_set_error (bfd_error_bad_value
);
1401 else if (vernum
> 1)
1403 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1409 /* We cannot simply test for the number of
1410 entries in the VERNEED section since the
1411 numbers for the needed versions do not start
1413 Elf_Internal_Verneed
*t
;
1416 for (t
= elf_tdata (abfd
)->verref
;
1420 Elf_Internal_Vernaux
*a
;
1422 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1424 if (a
->vna_other
== vernum
)
1426 verstr
= a
->vna_nodename
;
1435 (*_bfd_error_handler
)
1436 (_("%s: %s: invalid needed version %d"),
1437 bfd_get_filename (abfd
), name
, vernum
);
1438 bfd_set_error (bfd_error_bad_value
);
1443 namelen
= strlen (name
);
1444 newlen
= namelen
+ strlen (verstr
) + 2;
1445 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0)
1448 newname
= (char *) bfd_alloc (abfd
, newlen
);
1449 if (newname
== NULL
)
1451 strcpy (newname
, name
);
1452 p
= newname
+ namelen
;
1454 /* If this is a defined non-hidden version symbol,
1455 we add another @ to the name. This indicates the
1456 default version of the symbol. */
1457 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
1458 && sym
.st_shndx
!= SHN_UNDEF
)
1466 if (! elf_merge_symbol (abfd
, info
, name
, &sym
, &sec
, &value
,
1467 sym_hash
, &override
, &type_change_ok
,
1475 while (h
->root
.type
== bfd_link_hash_indirect
1476 || h
->root
.type
== bfd_link_hash_warning
)
1477 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1479 /* Remember the old alignment if this is a common symbol, so
1480 that we don't reduce the alignment later on. We can't
1481 check later, because _bfd_generic_link_add_one_symbol
1482 will set a default for the alignment which we want to
1484 if (h
->root
.type
== bfd_link_hash_common
)
1485 old_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1487 if (elf_tdata (abfd
)->verdef
!= NULL
1491 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
1494 if (! (_bfd_generic_link_add_one_symbol
1495 (info
, abfd
, name
, flags
, sec
, value
, (const char *) NULL
,
1496 false, collect
, (struct bfd_link_hash_entry
**) sym_hash
)))
1500 while (h
->root
.type
== bfd_link_hash_indirect
1501 || h
->root
.type
== bfd_link_hash_warning
)
1502 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1505 new_weakdef
= false;
1508 && (flags
& BSF_WEAK
) != 0
1509 && ELF_ST_TYPE (sym
.st_info
) != STT_FUNC
1510 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
1511 && h
->weakdef
== NULL
)
1513 /* Keep a list of all weak defined non function symbols from
1514 a dynamic object, using the weakdef field. Later in this
1515 function we will set the weakdef field to the correct
1516 value. We only put non-function symbols from dynamic
1517 objects on this list, because that happens to be the only
1518 time we need to know the normal symbol corresponding to a
1519 weak symbol, and the information is time consuming to
1520 figure out. If the weakdef field is not already NULL,
1521 then this symbol was already defined by some previous
1522 dynamic object, and we will be using that previous
1523 definition anyhow. */
1530 /* Set the alignment of a common symbol. */
1531 if (sym
.st_shndx
== SHN_COMMON
1532 && h
->root
.type
== bfd_link_hash_common
)
1536 align
= bfd_log2 (sym
.st_value
);
1537 if (align
> old_alignment
)
1538 h
->root
.u
.c
.p
->alignment_power
= align
;
1541 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1547 /* Remember the symbol size and type. */
1548 if (sym
.st_size
!= 0
1549 && (definition
|| h
->size
== 0))
1551 if (h
->size
!= 0 && h
->size
!= sym
.st_size
&& ! size_change_ok
)
1552 (*_bfd_error_handler
)
1553 (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"),
1554 name
, (unsigned long) h
->size
, (unsigned long) sym
.st_size
,
1555 bfd_get_filename (abfd
));
1557 h
->size
= sym
.st_size
;
1560 /* If this is a common symbol, then we always want H->SIZE
1561 to be the size of the common symbol. The code just above
1562 won't fix the size if a common symbol becomes larger. We
1563 don't warn about a size change here, because that is
1564 covered by --warn-common. */
1565 if (h
->root
.type
== bfd_link_hash_common
)
1566 h
->size
= h
->root
.u
.c
.size
;
1568 if (ELF_ST_TYPE (sym
.st_info
) != STT_NOTYPE
1569 && (definition
|| h
->type
== STT_NOTYPE
))
1571 if (h
->type
!= STT_NOTYPE
1572 && h
->type
!= ELF_ST_TYPE (sym
.st_info
)
1573 && ! type_change_ok
)
1574 (*_bfd_error_handler
)
1575 (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
1576 name
, h
->type
, ELF_ST_TYPE (sym
.st_info
),
1577 bfd_get_filename (abfd
));
1579 h
->type
= ELF_ST_TYPE (sym
.st_info
);
1582 /* If st_other has a processor-specific meaning, specific code
1583 might be needed here. */
1584 if (sym
.st_other
!= 0)
1586 /* Combine visibilities, using the most constraining one. */
1587 unsigned char hvis
= ELF_ST_VISIBILITY (h
->other
);
1588 unsigned char symvis
= ELF_ST_VISIBILITY (sym
.st_other
);
1590 if (symvis
&& (hvis
> symvis
|| hvis
== 0))
1591 h
->other
= sym
.st_other
;
1593 /* If neither has visibility, use the st_other of the
1594 definition. This is an arbitrary choice, since the
1595 other bits have no general meaning. */
1596 if (!symvis
&& !hvis
1597 && (definition
|| h
->other
== 0))
1598 h
->other
= sym
.st_other
;
1601 /* Set a flag in the hash table entry indicating the type of
1602 reference or definition we just found. Keep a count of
1603 the number of dynamic symbols we find. A dynamic symbol
1604 is one which is referenced or defined by both a regular
1605 object and a shared object. */
1606 old_flags
= h
->elf_link_hash_flags
;
1612 new_flag
= ELF_LINK_HASH_REF_REGULAR
;
1613 if (bind
!= STB_WEAK
)
1614 new_flag
|= ELF_LINK_HASH_REF_REGULAR_NONWEAK
;
1617 new_flag
= ELF_LINK_HASH_DEF_REGULAR
;
1619 || (old_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
1620 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0)
1626 new_flag
= ELF_LINK_HASH_REF_DYNAMIC
;
1628 new_flag
= ELF_LINK_HASH_DEF_DYNAMIC
;
1629 if ((old_flags
& (ELF_LINK_HASH_DEF_REGULAR
1630 | ELF_LINK_HASH_REF_REGULAR
)) != 0
1631 || (h
->weakdef
!= NULL
1633 && h
->weakdef
->dynindx
!= -1))
1637 h
->elf_link_hash_flags
|= new_flag
;
1639 /* If this symbol has a version, and it is the default
1640 version, we create an indirect symbol from the default
1641 name to the fully decorated name. This will cause
1642 external references which do not specify a version to be
1643 bound to this version of the symbol. */
1648 p
= strchr (name
, ELF_VER_CHR
);
1649 if (p
!= NULL
&& p
[1] == ELF_VER_CHR
)
1652 struct elf_link_hash_entry
*hi
;
1655 shortname
= bfd_hash_allocate (&info
->hash
->table
,
1657 if (shortname
== NULL
)
1659 strncpy (shortname
, name
, p
- name
);
1660 shortname
[p
- name
] = '\0';
1662 /* We are going to create a new symbol. Merge it
1663 with any existing symbol with this name. For the
1664 purposes of the merge, act as though we were
1665 defining the symbol we just defined, although we
1666 actually going to define an indirect symbol. */
1667 type_change_ok
= false;
1668 size_change_ok
= false;
1669 if (! elf_merge_symbol (abfd
, info
, shortname
, &sym
, &sec
,
1670 &value
, &hi
, &override
,
1671 &type_change_ok
, &size_change_ok
))
1676 if (! (_bfd_generic_link_add_one_symbol
1677 (info
, abfd
, shortname
, BSF_INDIRECT
,
1678 bfd_ind_section_ptr
, (bfd_vma
) 0, name
, false,
1679 collect
, (struct bfd_link_hash_entry
**) &hi
)))
1684 /* In this case the symbol named SHORTNAME is
1685 overriding the indirect symbol we want to
1686 add. We were planning on making SHORTNAME an
1687 indirect symbol referring to NAME. SHORTNAME
1688 is the name without a version. NAME is the
1689 fully versioned name, and it is the default
1692 Overriding means that we already saw a
1693 definition for the symbol SHORTNAME in a
1694 regular object, and it is overriding the
1695 symbol defined in the dynamic object.
1697 When this happens, we actually want to change
1698 NAME, the symbol we just added, to refer to
1699 SHORTNAME. This will cause references to
1700 NAME in the shared object to become
1701 references to SHORTNAME in the regular
1702 object. This is what we expect when we
1703 override a function in a shared object: that
1704 the references in the shared object will be
1705 mapped to the definition in the regular
1708 while (hi
->root
.type
== bfd_link_hash_indirect
1709 || hi
->root
.type
== bfd_link_hash_warning
)
1710 hi
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1712 h
->root
.type
= bfd_link_hash_indirect
;
1713 h
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) hi
;
1714 if (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
)
1716 h
->elf_link_hash_flags
&=~ ELF_LINK_HASH_DEF_DYNAMIC
;
1717 hi
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_DYNAMIC
;
1718 if (hi
->elf_link_hash_flags
1719 & (ELF_LINK_HASH_REF_REGULAR
1720 | ELF_LINK_HASH_DEF_REGULAR
))
1722 if (! _bfd_elf_link_record_dynamic_symbol (info
,
1728 /* Now set HI to H, so that the following code
1729 will set the other fields correctly. */
1733 /* If there is a duplicate definition somewhere,
1734 then HI may not point to an indirect symbol. We
1735 will have reported an error to the user in that
1738 if (hi
->root
.type
== bfd_link_hash_indirect
)
1740 struct elf_link_hash_entry
*ht
;
1742 /* If the symbol became indirect, then we assume
1743 that we have not seen a definition before. */
1744 BFD_ASSERT ((hi
->elf_link_hash_flags
1745 & (ELF_LINK_HASH_DEF_DYNAMIC
1746 | ELF_LINK_HASH_DEF_REGULAR
))
1749 ht
= (struct elf_link_hash_entry
*) hi
->root
.u
.i
.link
;
1750 (*bed
->elf_backend_copy_indirect_symbol
) (ht
, hi
);
1752 /* See if the new flags lead us to realize that
1753 the symbol must be dynamic. */
1759 || ((hi
->elf_link_hash_flags
1760 & ELF_LINK_HASH_REF_DYNAMIC
)
1766 if ((hi
->elf_link_hash_flags
1767 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1773 /* We also need to define an indirection from the
1774 nondefault version of the symbol. */
1776 shortname
= bfd_hash_allocate (&info
->hash
->table
,
1778 if (shortname
== NULL
)
1780 strncpy (shortname
, name
, p
- name
);
1781 strcpy (shortname
+ (p
- name
), p
+ 1);
1783 /* Once again, merge with any existing symbol. */
1784 type_change_ok
= false;
1785 size_change_ok
= false;
1786 if (! elf_merge_symbol (abfd
, info
, shortname
, &sym
, &sec
,
1787 &value
, &hi
, &override
,
1788 &type_change_ok
, &size_change_ok
))
1793 /* Here SHORTNAME is a versioned name, so we
1794 don't expect to see the type of override we
1795 do in the case above. */
1796 (*_bfd_error_handler
)
1797 (_("%s: warning: unexpected redefinition of `%s'"),
1798 bfd_get_filename (abfd
), shortname
);
1802 if (! (_bfd_generic_link_add_one_symbol
1803 (info
, abfd
, shortname
, BSF_INDIRECT
,
1804 bfd_ind_section_ptr
, (bfd_vma
) 0, name
, false,
1805 collect
, (struct bfd_link_hash_entry
**) &hi
)))
1808 /* If there is a duplicate definition somewhere,
1809 then HI may not point to an indirect symbol.
1810 We will have reported an error to the user in
1813 if (hi
->root
.type
== bfd_link_hash_indirect
)
1815 /* If the symbol became indirect, then we
1816 assume that we have not seen a definition
1818 BFD_ASSERT ((hi
->elf_link_hash_flags
1819 & (ELF_LINK_HASH_DEF_DYNAMIC
1820 | ELF_LINK_HASH_DEF_REGULAR
))
1823 (*bed
->elf_backend_copy_indirect_symbol
) (h
, hi
);
1825 /* See if the new flags lead us to realize
1826 that the symbol must be dynamic. */
1832 || ((hi
->elf_link_hash_flags
1833 & ELF_LINK_HASH_REF_DYNAMIC
)
1839 if ((hi
->elf_link_hash_flags
1840 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1849 if (dynsym
&& h
->dynindx
== -1)
1851 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
1853 if (h
->weakdef
!= NULL
1855 && h
->weakdef
->dynindx
== -1)
1857 if (! _bfd_elf_link_record_dynamic_symbol (info
,
1862 else if (dynsym
&& h
->dynindx
!= -1)
1863 /* If the symbol already has a dynamic index, but
1864 visibility says it should not be visible, turn it into
1866 switch (ELF_ST_VISIBILITY (h
->other
))
1870 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
1871 (*bed
->elf_backend_hide_symbol
) (info
, h
);
1875 if (dt_needed
&& definition
1876 && (h
->elf_link_hash_flags
1877 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1879 bfd_size_type oldsize
;
1880 bfd_size_type strindex
;
1882 /* The symbol from a DT_NEEDED object is referenced from
1883 the regular object to create a dynamic executable. We
1884 have to make sure there is a DT_NEEDED entry for it. */
1887 oldsize
= _bfd_stringtab_size (elf_hash_table (info
)->dynstr
);
1888 strindex
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
1889 elf_dt_soname (abfd
),
1891 if (strindex
== (bfd_size_type
) -1)
1895 == _bfd_stringtab_size (elf_hash_table (info
)->dynstr
))
1898 Elf_External_Dyn
*dyncon
, *dynconend
;
1900 sdyn
= bfd_get_section_by_name (elf_hash_table (info
)->dynobj
,
1902 BFD_ASSERT (sdyn
!= NULL
);
1904 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
1905 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
1907 for (; dyncon
< dynconend
; dyncon
++)
1909 Elf_Internal_Dyn dyn
;
1911 elf_swap_dyn_in (elf_hash_table (info
)->dynobj
,
1913 BFD_ASSERT (dyn
.d_tag
!= DT_NEEDED
||
1914 dyn
.d_un
.d_val
!= strindex
);
1918 if (! elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
1924 /* Now set the weakdefs field correctly for all the weak defined
1925 symbols we found. The only way to do this is to search all the
1926 symbols. Since we only need the information for non functions in
1927 dynamic objects, that's the only time we actually put anything on
1928 the list WEAKS. We need this information so that if a regular
1929 object refers to a symbol defined weakly in a dynamic object, the
1930 real symbol in the dynamic object is also put in the dynamic
1931 symbols; we also must arrange for both symbols to point to the
1932 same memory location. We could handle the general case of symbol
1933 aliasing, but a general symbol alias can only be generated in
1934 assembler code, handling it correctly would be very time
1935 consuming, and other ELF linkers don't handle general aliasing
1937 while (weaks
!= NULL
)
1939 struct elf_link_hash_entry
*hlook
;
1942 struct elf_link_hash_entry
**hpp
;
1943 struct elf_link_hash_entry
**hppend
;
1946 weaks
= hlook
->weakdef
;
1947 hlook
->weakdef
= NULL
;
1949 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
1950 || hlook
->root
.type
== bfd_link_hash_defweak
1951 || hlook
->root
.type
== bfd_link_hash_common
1952 || hlook
->root
.type
== bfd_link_hash_indirect
);
1953 slook
= hlook
->root
.u
.def
.section
;
1954 vlook
= hlook
->root
.u
.def
.value
;
1956 hpp
= elf_sym_hashes (abfd
);
1957 hppend
= hpp
+ extsymcount
;
1958 for (; hpp
< hppend
; hpp
++)
1960 struct elf_link_hash_entry
*h
;
1963 if (h
!= NULL
&& h
!= hlook
1964 && h
->root
.type
== bfd_link_hash_defined
1965 && h
->root
.u
.def
.section
== slook
1966 && h
->root
.u
.def
.value
== vlook
)
1970 /* If the weak definition is in the list of dynamic
1971 symbols, make sure the real definition is put there
1973 if (hlook
->dynindx
!= -1
1974 && h
->dynindx
== -1)
1976 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
1980 /* If the real definition is in the list of dynamic
1981 symbols, make sure the weak definition is put there
1982 as well. If we don't do this, then the dynamic
1983 loader might not merge the entries for the real
1984 definition and the weak definition. */
1985 if (h
->dynindx
!= -1
1986 && hlook
->dynindx
== -1)
1988 if (! _bfd_elf_link_record_dynamic_symbol (info
, hlook
))
2003 if (extversym
!= NULL
)
2009 /* If this object is the same format as the output object, and it is
2010 not a shared library, then let the backend look through the
2013 This is required to build global offset table entries and to
2014 arrange for dynamic relocs. It is not required for the
2015 particular common case of linking non PIC code, even when linking
2016 against shared libraries, but unfortunately there is no way of
2017 knowing whether an object file has been compiled PIC or not.
2018 Looking through the relocs is not particularly time consuming.
2019 The problem is that we must either (1) keep the relocs in memory,
2020 which causes the linker to require additional runtime memory or
2021 (2) read the relocs twice from the input file, which wastes time.
2022 This would be a good case for using mmap.
2024 I have no idea how to handle linking PIC code into a file of a
2025 different format. It probably can't be done. */
2026 check_relocs
= get_elf_backend_data (abfd
)->check_relocs
;
2028 && abfd
->xvec
== info
->hash
->creator
2029 && check_relocs
!= NULL
)
2033 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
2035 Elf_Internal_Rela
*internal_relocs
;
2038 if ((o
->flags
& SEC_RELOC
) == 0
2039 || o
->reloc_count
== 0
2040 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
2041 && (o
->flags
& SEC_DEBUGGING
) != 0)
2042 || bfd_is_abs_section (o
->output_section
))
2045 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
2046 (abfd
, o
, (PTR
) NULL
,
2047 (Elf_Internal_Rela
*) NULL
,
2048 info
->keep_memory
));
2049 if (internal_relocs
== NULL
)
2052 ok
= (*check_relocs
) (abfd
, info
, o
, internal_relocs
);
2054 if (! info
->keep_memory
)
2055 free (internal_relocs
);
2062 /* If this is a non-traditional, non-relocateable link, try to
2063 optimize the handling of the .stab/.stabstr sections. */
2065 && ! info
->relocateable
2066 && ! info
->traditional_format
2067 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
2068 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
2070 asection
*stab
, *stabstr
;
2072 stab
= bfd_get_section_by_name (abfd
, ".stab");
2075 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
2077 if (stabstr
!= NULL
)
2079 struct bfd_elf_section_data
*secdata
;
2081 secdata
= elf_section_data (stab
);
2082 if (! _bfd_link_section_stabs (abfd
,
2083 &elf_hash_table (info
)->stab_info
,
2085 &secdata
->stab_info
))
2100 if (extversym
!= NULL
)
2105 /* Create some sections which will be filled in with dynamic linking
2106 information. ABFD is an input file which requires dynamic sections
2107 to be created. The dynamic sections take up virtual memory space
2108 when the final executable is run, so we need to create them before
2109 addresses are assigned to the output sections. We work out the
2110 actual contents and size of these sections later. */
2113 elf_link_create_dynamic_sections (abfd
, info
)
2115 struct bfd_link_info
*info
;
2118 register asection
*s
;
2119 struct elf_link_hash_entry
*h
;
2120 struct elf_backend_data
*bed
;
2122 if (elf_hash_table (info
)->dynamic_sections_created
)
2125 /* Make sure that all dynamic sections use the same input BFD. */
2126 if (elf_hash_table (info
)->dynobj
== NULL
)
2127 elf_hash_table (info
)->dynobj
= abfd
;
2129 abfd
= elf_hash_table (info
)->dynobj
;
2131 /* Note that we set the SEC_IN_MEMORY flag for all of these
2133 flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
2134 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
2136 /* A dynamically linked executable has a .interp section, but a
2137 shared library does not. */
2140 s
= bfd_make_section (abfd
, ".interp");
2142 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
2146 /* Create sections to hold version informations. These are removed
2147 if they are not needed. */
2148 s
= bfd_make_section (abfd
, ".gnu.version_d");
2150 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2151 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2154 s
= bfd_make_section (abfd
, ".gnu.version");
2156 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2157 || ! bfd_set_section_alignment (abfd
, s
, 1))
2160 s
= bfd_make_section (abfd
, ".gnu.version_r");
2162 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2163 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2166 s
= bfd_make_section (abfd
, ".dynsym");
2168 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2169 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2172 s
= bfd_make_section (abfd
, ".dynstr");
2174 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
))
2177 /* Create a strtab to hold the dynamic symbol names. */
2178 if (elf_hash_table (info
)->dynstr
== NULL
)
2180 elf_hash_table (info
)->dynstr
= elf_stringtab_init ();
2181 if (elf_hash_table (info
)->dynstr
== NULL
)
2185 s
= bfd_make_section (abfd
, ".dynamic");
2187 || ! bfd_set_section_flags (abfd
, s
, flags
)
2188 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2191 /* The special symbol _DYNAMIC is always set to the start of the
2192 .dynamic section. This call occurs before we have processed the
2193 symbols for any dynamic object, so we don't have to worry about
2194 overriding a dynamic definition. We could set _DYNAMIC in a
2195 linker script, but we only want to define it if we are, in fact,
2196 creating a .dynamic section. We don't want to define it if there
2197 is no .dynamic section, since on some ELF platforms the start up
2198 code examines it to decide how to initialize the process. */
2200 if (! (_bfd_generic_link_add_one_symbol
2201 (info
, abfd
, "_DYNAMIC", BSF_GLOBAL
, s
, (bfd_vma
) 0,
2202 (const char *) NULL
, false, get_elf_backend_data (abfd
)->collect
,
2203 (struct bfd_link_hash_entry
**) &h
)))
2205 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2206 h
->type
= STT_OBJECT
;
2209 && ! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2212 bed
= get_elf_backend_data (abfd
);
2214 s
= bfd_make_section (abfd
, ".hash");
2216 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
2217 || ! bfd_set_section_alignment (abfd
, s
, LOG_FILE_ALIGN
))
2219 elf_section_data (s
)->this_hdr
.sh_entsize
= bed
->s
->sizeof_hash_entry
;
2221 /* Let the backend create the rest of the sections. This lets the
2222 backend set the right flags. The backend will normally create
2223 the .got and .plt sections. */
2224 if (! (*bed
->elf_backend_create_dynamic_sections
) (abfd
, info
))
2227 elf_hash_table (info
)->dynamic_sections_created
= true;
2232 /* Add an entry to the .dynamic table. */
2235 elf_add_dynamic_entry (info
, tag
, val
)
2236 struct bfd_link_info
*info
;
2240 Elf_Internal_Dyn dyn
;
2244 bfd_byte
*newcontents
;
2246 dynobj
= elf_hash_table (info
)->dynobj
;
2248 s
= bfd_get_section_by_name (dynobj
, ".dynamic");
2249 BFD_ASSERT (s
!= NULL
);
2251 newsize
= s
->_raw_size
+ sizeof (Elf_External_Dyn
);
2252 newcontents
= (bfd_byte
*) bfd_realloc (s
->contents
, newsize
);
2253 if (newcontents
== NULL
)
2257 dyn
.d_un
.d_val
= val
;
2258 elf_swap_dyn_out (dynobj
, &dyn
,
2259 (Elf_External_Dyn
*) (newcontents
+ s
->_raw_size
));
2261 s
->_raw_size
= newsize
;
2262 s
->contents
= newcontents
;
2267 /* Record a new local dynamic symbol. */
2270 elf_link_record_local_dynamic_symbol (info
, input_bfd
, input_indx
)
2271 struct bfd_link_info
*info
;
2275 struct elf_link_local_dynamic_entry
*entry
;
2276 struct elf_link_hash_table
*eht
;
2277 struct bfd_strtab_hash
*dynstr
;
2278 Elf_External_Sym esym
;
2279 unsigned long dynstr_index
;
2282 /* See if the entry exists already. */
2283 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
2284 if (entry
->input_bfd
== input_bfd
&& entry
->input_indx
== input_indx
)
2287 entry
= (struct elf_link_local_dynamic_entry
*)
2288 bfd_alloc (input_bfd
, sizeof (*entry
));
2292 /* Go find the symbol, so that we can find it's name. */
2293 if (bfd_seek (input_bfd
,
2294 (elf_tdata (input_bfd
)->symtab_hdr
.sh_offset
2295 + input_indx
* sizeof (Elf_External_Sym
)),
2297 || (bfd_read (&esym
, sizeof (Elf_External_Sym
), 1, input_bfd
)
2298 != sizeof (Elf_External_Sym
)))
2300 elf_swap_symbol_in (input_bfd
, &esym
, &entry
->isym
);
2302 name
= (bfd_elf_string_from_elf_section
2303 (input_bfd
, elf_tdata (input_bfd
)->symtab_hdr
.sh_link
,
2304 entry
->isym
.st_name
));
2306 dynstr
= elf_hash_table (info
)->dynstr
;
2309 /* Create a strtab to hold the dynamic symbol names. */
2310 elf_hash_table (info
)->dynstr
= dynstr
= _bfd_elf_stringtab_init ();
2315 dynstr_index
= _bfd_stringtab_add (dynstr
, name
, true, false);
2316 if (dynstr_index
== (unsigned long) -1)
2318 entry
->isym
.st_name
= dynstr_index
;
2320 eht
= elf_hash_table (info
);
2322 entry
->next
= eht
->dynlocal
;
2323 eht
->dynlocal
= entry
;
2324 entry
->input_bfd
= input_bfd
;
2325 entry
->input_indx
= input_indx
;
2328 /* Whatever binding the symbol had before, it's now local. */
2330 = ELF_ST_INFO (STB_LOCAL
, ELF_ST_TYPE (entry
->isym
.st_info
));
2332 /* The dynindx will be set at the end of size_dynamic_sections. */
2338 /* Read and swap the relocs from the section indicated by SHDR. This
2339 may be either a REL or a RELA section. The relocations are
2340 translated into RELA relocations and stored in INTERNAL_RELOCS,
2341 which should have already been allocated to contain enough space.
2342 The EXTERNAL_RELOCS are a buffer where the external form of the
2343 relocations should be stored.
2345 Returns false if something goes wrong. */
2348 elf_link_read_relocs_from_section (abfd
, shdr
, external_relocs
,
2351 Elf_Internal_Shdr
*shdr
;
2352 PTR external_relocs
;
2353 Elf_Internal_Rela
*internal_relocs
;
2355 struct elf_backend_data
*bed
;
2357 /* If there aren't any relocations, that's OK. */
2361 /* Position ourselves at the start of the section. */
2362 if (bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0)
2365 /* Read the relocations. */
2366 if (bfd_read (external_relocs
, 1, shdr
->sh_size
, abfd
)
2370 bed
= get_elf_backend_data (abfd
);
2372 /* Convert the external relocations to the internal format. */
2373 if (shdr
->sh_entsize
== sizeof (Elf_External_Rel
))
2375 Elf_External_Rel
*erel
;
2376 Elf_External_Rel
*erelend
;
2377 Elf_Internal_Rela
*irela
;
2378 Elf_Internal_Rel
*irel
;
2380 erel
= (Elf_External_Rel
*) external_relocs
;
2381 erelend
= erel
+ shdr
->sh_size
/ shdr
->sh_entsize
;
2382 irela
= internal_relocs
;
2383 irel
= bfd_alloc (abfd
, (bed
->s
->int_rels_per_ext_rel
2384 * sizeof (Elf_Internal_Rel
)));
2385 for (; erel
< erelend
; erel
++, irela
+= bed
->s
->int_rels_per_ext_rel
)
2389 if (bed
->s
->swap_reloc_in
)
2390 (*bed
->s
->swap_reloc_in
) (abfd
, (bfd_byte
*) erel
, irel
);
2392 elf_swap_reloc_in (abfd
, erel
, irel
);
2394 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; ++i
)
2396 irela
[i
].r_offset
= irel
[i
].r_offset
;
2397 irela
[i
].r_info
= irel
[i
].r_info
;
2398 irela
[i
].r_addend
= 0;
2404 Elf_External_Rela
*erela
;
2405 Elf_External_Rela
*erelaend
;
2406 Elf_Internal_Rela
*irela
;
2408 BFD_ASSERT (shdr
->sh_entsize
== sizeof (Elf_External_Rela
));
2410 erela
= (Elf_External_Rela
*) external_relocs
;
2411 erelaend
= erela
+ shdr
->sh_size
/ shdr
->sh_entsize
;
2412 irela
= internal_relocs
;
2413 for (; erela
< erelaend
; erela
++, irela
+= bed
->s
->int_rels_per_ext_rel
)
2415 if (bed
->s
->swap_reloca_in
)
2416 (*bed
->s
->swap_reloca_in
) (abfd
, (bfd_byte
*) erela
, irela
);
2418 elf_swap_reloca_in (abfd
, erela
, irela
);
2425 /* Read and swap the relocs for a section O. They may have been
2426 cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
2427 not NULL, they are used as buffers to read into. They are known to
2428 be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
2429 the return value is allocated using either malloc or bfd_alloc,
2430 according to the KEEP_MEMORY argument. If O has two relocation
2431 sections (both REL and RELA relocations), then the REL_HDR
2432 relocations will appear first in INTERNAL_RELOCS, followed by the
2433 REL_HDR2 relocations. */
2436 NAME(_bfd_elf
,link_read_relocs
) (abfd
, o
, external_relocs
, internal_relocs
,
2440 PTR external_relocs
;
2441 Elf_Internal_Rela
*internal_relocs
;
2442 boolean keep_memory
;
2444 Elf_Internal_Shdr
*rel_hdr
;
2446 Elf_Internal_Rela
*alloc2
= NULL
;
2447 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2449 if (elf_section_data (o
)->relocs
!= NULL
)
2450 return elf_section_data (o
)->relocs
;
2452 if (o
->reloc_count
== 0)
2455 rel_hdr
= &elf_section_data (o
)->rel_hdr
;
2457 if (internal_relocs
== NULL
)
2461 size
= (o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
2462 * sizeof (Elf_Internal_Rela
));
2464 internal_relocs
= (Elf_Internal_Rela
*) bfd_alloc (abfd
, size
);
2466 internal_relocs
= alloc2
= (Elf_Internal_Rela
*) bfd_malloc (size
);
2467 if (internal_relocs
== NULL
)
2471 if (external_relocs
== NULL
)
2473 size_t size
= (size_t) rel_hdr
->sh_size
;
2475 if (elf_section_data (o
)->rel_hdr2
)
2476 size
+= (size_t) elf_section_data (o
)->rel_hdr2
->sh_size
;
2477 alloc1
= (PTR
) bfd_malloc (size
);
2480 external_relocs
= alloc1
;
2483 if (!elf_link_read_relocs_from_section (abfd
, rel_hdr
,
2487 if (!elf_link_read_relocs_from_section
2489 elf_section_data (o
)->rel_hdr2
,
2490 ((bfd_byte
*) external_relocs
) + rel_hdr
->sh_size
,
2491 internal_relocs
+ (rel_hdr
->sh_size
/ rel_hdr
->sh_entsize
2492 * bed
->s
->int_rels_per_ext_rel
)))
2495 /* Cache the results for next time, if we can. */
2497 elf_section_data (o
)->relocs
= internal_relocs
;
2502 /* Don't free alloc2, since if it was allocated we are passing it
2503 back (under the name of internal_relocs). */
2505 return internal_relocs
;
2516 /* Record an assignment to a symbol made by a linker script. We need
2517 this in case some dynamic object refers to this symbol. */
2521 NAME(bfd_elf
,record_link_assignment
) (output_bfd
, info
, name
, provide
)
2522 bfd
*output_bfd ATTRIBUTE_UNUSED
;
2523 struct bfd_link_info
*info
;
2527 struct elf_link_hash_entry
*h
;
2529 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2532 h
= elf_link_hash_lookup (elf_hash_table (info
), name
, true, true, false);
2536 if (h
->root
.type
== bfd_link_hash_new
)
2537 h
->elf_link_hash_flags
&=~ ELF_LINK_NON_ELF
;
2539 /* If this symbol is being provided by the linker script, and it is
2540 currently defined by a dynamic object, but not by a regular
2541 object, then mark it as undefined so that the generic linker will
2542 force the correct value. */
2544 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2545 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2546 h
->root
.type
= bfd_link_hash_undefined
;
2548 /* If this symbol is not being provided by the linker script, and it is
2549 currently defined by a dynamic object, but not by a regular object,
2550 then clear out any version information because the symbol will not be
2551 associated with the dynamic object any more. */
2553 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2554 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
2555 h
->verinfo
.verdef
= NULL
;
2557 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2559 /* When possible, keep the original type of the symbol */
2560 if (h
->type
== STT_NOTYPE
)
2561 h
->type
= STT_OBJECT
;
2563 if (((h
->elf_link_hash_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
2564 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0
2566 && h
->dynindx
== -1)
2568 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2571 /* If this is a weak defined symbol, and we know a corresponding
2572 real symbol from the same dynamic object, make sure the real
2573 symbol is also made into a dynamic symbol. */
2574 if (h
->weakdef
!= NULL
2575 && h
->weakdef
->dynindx
== -1)
2577 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
->weakdef
))
2585 /* This structure is used to pass information to
2586 elf_link_assign_sym_version. */
2588 struct elf_assign_sym_version_info
2592 /* General link information. */
2593 struct bfd_link_info
*info
;
2595 struct bfd_elf_version_tree
*verdefs
;
2596 /* Whether we are exporting all dynamic symbols. */
2597 boolean export_dynamic
;
2598 /* Whether we had a failure. */
2602 /* This structure is used to pass information to
2603 elf_link_find_version_dependencies. */
2605 struct elf_find_verdep_info
2609 /* General link information. */
2610 struct bfd_link_info
*info
;
2611 /* The number of dependencies. */
2613 /* Whether we had a failure. */
2617 /* Array used to determine the number of hash table buckets to use
2618 based on the number of symbols there are. If there are fewer than
2619 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
2620 fewer than 37 we use 17 buckets, and so forth. We never use more
2621 than 32771 buckets. */
2623 static const size_t elf_buckets
[] =
2625 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
2629 /* Compute bucket count for hashing table. We do not use a static set
2630 of possible tables sizes anymore. Instead we determine for all
2631 possible reasonable sizes of the table the outcome (i.e., the
2632 number of collisions etc) and choose the best solution. The
2633 weighting functions are not too simple to allow the table to grow
2634 without bounds. Instead one of the weighting factors is the size.
2635 Therefore the result is always a good payoff between few collisions
2636 (= short chain lengths) and table size. */
2638 compute_bucket_count (info
)
2639 struct bfd_link_info
*info
;
2641 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
2642 size_t best_size
= 0;
2643 unsigned long int *hashcodes
;
2644 unsigned long int *hashcodesp
;
2645 unsigned long int i
;
2647 /* Compute the hash values for all exported symbols. At the same
2648 time store the values in an array so that we could use them for
2650 hashcodes
= (unsigned long int *) bfd_malloc (dynsymcount
2651 * sizeof (unsigned long int));
2652 if (hashcodes
== NULL
)
2654 hashcodesp
= hashcodes
;
2656 /* Put all hash values in HASHCODES. */
2657 elf_link_hash_traverse (elf_hash_table (info
),
2658 elf_collect_hash_codes
, &hashcodesp
);
2660 /* We have a problem here. The following code to optimize the table
2661 size requires an integer type with more the 32 bits. If
2662 BFD_HOST_U_64_BIT is set we know about such a type. */
2663 #ifdef BFD_HOST_U_64_BIT
2664 if (info
->optimize
== true)
2666 unsigned long int nsyms
= hashcodesp
- hashcodes
;
2669 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
2670 unsigned long int *counts
;
2672 /* Possible optimization parameters: if we have NSYMS symbols we say
2673 that the hashing table must at least have NSYMS/4 and at most
2675 minsize
= nsyms
/ 4;
2678 best_size
= maxsize
= nsyms
* 2;
2680 /* Create array where we count the collisions in. We must use bfd_malloc
2681 since the size could be large. */
2682 counts
= (unsigned long int *) bfd_malloc (maxsize
2683 * sizeof (unsigned long int));
2690 /* Compute the "optimal" size for the hash table. The criteria is a
2691 minimal chain length. The minor criteria is (of course) the size
2693 for (i
= minsize
; i
< maxsize
; ++i
)
2695 /* Walk through the array of hashcodes and count the collisions. */
2696 BFD_HOST_U_64_BIT max
;
2697 unsigned long int j
;
2698 unsigned long int fact
;
2700 memset (counts
, '\0', i
* sizeof (unsigned long int));
2702 /* Determine how often each hash bucket is used. */
2703 for (j
= 0; j
< nsyms
; ++j
)
2704 ++counts
[hashcodes
[j
] % i
];
2706 /* For the weight function we need some information about the
2707 pagesize on the target. This is information need not be 100%
2708 accurate. Since this information is not available (so far) we
2709 define it here to a reasonable default value. If it is crucial
2710 to have a better value some day simply define this value. */
2711 # ifndef BFD_TARGET_PAGESIZE
2712 # define BFD_TARGET_PAGESIZE (4096)
2715 /* We in any case need 2 + NSYMS entries for the size values and
2717 max
= (2 + nsyms
) * (ARCH_SIZE
/ 8);
2720 /* Variant 1: optimize for short chains. We add the squares
2721 of all the chain lengths (which favous many small chain
2722 over a few long chains). */
2723 for (j
= 0; j
< i
; ++j
)
2724 max
+= counts
[j
] * counts
[j
];
2726 /* This adds penalties for the overall size of the table. */
2727 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2730 /* Variant 2: Optimize a lot more for small table. Here we
2731 also add squares of the size but we also add penalties for
2732 empty slots (the +1 term). */
2733 for (j
= 0; j
< i
; ++j
)
2734 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
2736 /* The overall size of the table is considered, but not as
2737 strong as in variant 1, where it is squared. */
2738 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
2742 /* Compare with current best results. */
2743 if (max
< best_chlen
)
2753 #endif /* defined (BFD_HOST_U_64_BIT) */
2755 /* This is the fallback solution if no 64bit type is available or if we
2756 are not supposed to spend much time on optimizations. We select the
2757 bucket count using a fixed set of numbers. */
2758 for (i
= 0; elf_buckets
[i
] != 0; i
++)
2760 best_size
= elf_buckets
[i
];
2761 if (dynsymcount
< elf_buckets
[i
+ 1])
2766 /* Free the arrays we needed. */
2772 /* Set up the sizes and contents of the ELF dynamic sections. This is
2773 called by the ELF linker emulation before_allocation routine. We
2774 must set the sizes of the sections before the linker sets the
2775 addresses of the various sections. */
2778 NAME(bfd_elf
,size_dynamic_sections
) (output_bfd
, soname
, rpath
,
2779 export_dynamic
, filter_shlib
,
2780 auxiliary_filters
, info
, sinterpptr
,
2785 boolean export_dynamic
;
2786 const char *filter_shlib
;
2787 const char * const *auxiliary_filters
;
2788 struct bfd_link_info
*info
;
2789 asection
**sinterpptr
;
2790 struct bfd_elf_version_tree
*verdefs
;
2792 bfd_size_type soname_indx
;
2794 struct elf_backend_data
*bed
;
2795 struct elf_assign_sym_version_info asvinfo
;
2799 soname_indx
= (bfd_size_type
) -1;
2801 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
2804 /* The backend may have to create some sections regardless of whether
2805 we're dynamic or not. */
2806 bed
= get_elf_backend_data (output_bfd
);
2807 if (bed
->elf_backend_always_size_sections
2808 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
2811 dynobj
= elf_hash_table (info
)->dynobj
;
2813 /* If there were no dynamic objects in the link, there is nothing to
2818 if (elf_hash_table (info
)->dynamic_sections_created
)
2820 struct elf_info_failed eif
;
2821 struct elf_link_hash_entry
*h
;
2822 bfd_size_type strsize
;
2824 *sinterpptr
= bfd_get_section_by_name (dynobj
, ".interp");
2825 BFD_ASSERT (*sinterpptr
!= NULL
|| info
->shared
);
2829 soname_indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2830 soname
, true, true);
2831 if (soname_indx
== (bfd_size_type
) -1
2832 || ! elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
2838 if (! elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
2840 info
->flags
|= DF_SYMBOLIC
;
2847 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
, rpath
,
2849 if (indx
== (bfd_size_type
) -1
2850 || ! elf_add_dynamic_entry (info
, DT_RPATH
, indx
)
2852 && ! elf_add_dynamic_entry (info
, DT_RUNPATH
, indx
)))
2856 if (filter_shlib
!= NULL
)
2860 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2861 filter_shlib
, true, true);
2862 if (indx
== (bfd_size_type
) -1
2863 || ! elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
2867 if (auxiliary_filters
!= NULL
)
2869 const char * const *p
;
2871 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
2875 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
2877 if (indx
== (bfd_size_type
) -1
2878 || ! elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
2883 /* If we are supposed to export all symbols into the dynamic symbol
2884 table (this is not the normal case), then do so. */
2887 struct elf_info_failed eif
;
2891 elf_link_hash_traverse (elf_hash_table (info
), elf_export_symbol
,
2897 /* Attach all the symbols to their version information. */
2898 asvinfo
.output_bfd
= output_bfd
;
2899 asvinfo
.info
= info
;
2900 asvinfo
.verdefs
= verdefs
;
2901 asvinfo
.export_dynamic
= export_dynamic
;
2902 asvinfo
.failed
= false;
2904 elf_link_hash_traverse (elf_hash_table (info
),
2905 elf_link_assign_sym_version
,
2910 /* Find all symbols which were defined in a dynamic object and make
2911 the backend pick a reasonable value for them. */
2914 elf_link_hash_traverse (elf_hash_table (info
),
2915 elf_adjust_dynamic_symbol
,
2920 /* Add some entries to the .dynamic section. We fill in some of the
2921 values later, in elf_bfd_final_link, but we must add the entries
2922 now so that we know the final size of the .dynamic section. */
2924 /* If there are initialization and/or finalization functions to
2925 call then add the corresponding DT_INIT/DT_FINI entries. */
2926 h
= (info
->init_function
2927 ? elf_link_hash_lookup (elf_hash_table (info
),
2928 info
->init_function
, false,
2932 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
2933 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
2935 if (! elf_add_dynamic_entry (info
, DT_INIT
, 0))
2938 h
= (info
->fini_function
2939 ? elf_link_hash_lookup (elf_hash_table (info
),
2940 info
->fini_function
, false,
2944 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
2945 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
2947 if (! elf_add_dynamic_entry (info
, DT_FINI
, 0))
2951 strsize
= _bfd_stringtab_size (elf_hash_table (info
)->dynstr
);
2952 if (! elf_add_dynamic_entry (info
, DT_HASH
, 0)
2953 || ! elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
2954 || ! elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
2955 || ! elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
2956 || ! elf_add_dynamic_entry (info
, DT_SYMENT
,
2957 sizeof (Elf_External_Sym
)))
2961 /* The backend must work out the sizes of all the other dynamic
2963 if (bed
->elf_backend_size_dynamic_sections
2964 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
2967 if (elf_hash_table (info
)->dynamic_sections_created
)
2971 size_t bucketcount
= 0;
2972 Elf_Internal_Sym isym
;
2973 size_t hash_entry_size
;
2975 /* Set up the version definition section. */
2976 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
2977 BFD_ASSERT (s
!= NULL
);
2979 /* We may have created additional version definitions if we are
2980 just linking a regular application. */
2981 verdefs
= asvinfo
.verdefs
;
2983 if (verdefs
== NULL
)
2984 _bfd_strip_section_from_output (info
, s
);
2989 struct bfd_elf_version_tree
*t
;
2991 Elf_Internal_Verdef def
;
2992 Elf_Internal_Verdaux defaux
;
2997 /* Make space for the base version. */
2998 size
+= sizeof (Elf_External_Verdef
);
2999 size
+= sizeof (Elf_External_Verdaux
);
3002 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3004 struct bfd_elf_version_deps
*n
;
3006 size
+= sizeof (Elf_External_Verdef
);
3007 size
+= sizeof (Elf_External_Verdaux
);
3010 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3011 size
+= sizeof (Elf_External_Verdaux
);
3014 s
->_raw_size
= size
;
3015 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3016 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
3019 /* Fill in the version definition section. */
3023 def
.vd_version
= VER_DEF_CURRENT
;
3024 def
.vd_flags
= VER_FLG_BASE
;
3027 def
.vd_aux
= sizeof (Elf_External_Verdef
);
3028 def
.vd_next
= (sizeof (Elf_External_Verdef
)
3029 + sizeof (Elf_External_Verdaux
));
3031 if (soname_indx
!= (bfd_size_type
) -1)
3033 def
.vd_hash
= bfd_elf_hash (soname
);
3034 defaux
.vda_name
= soname_indx
;
3041 name
= output_bfd
->filename
;
3042 def
.vd_hash
= bfd_elf_hash (name
);
3043 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
3045 if (indx
== (bfd_size_type
) -1)
3047 defaux
.vda_name
= indx
;
3049 defaux
.vda_next
= 0;
3051 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
3052 (Elf_External_Verdef
*)p
);
3053 p
+= sizeof (Elf_External_Verdef
);
3054 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3055 (Elf_External_Verdaux
*) p
);
3056 p
+= sizeof (Elf_External_Verdaux
);
3058 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
3061 struct bfd_elf_version_deps
*n
;
3062 struct elf_link_hash_entry
*h
;
3065 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3068 /* Add a symbol representing this version. */
3070 if (! (_bfd_generic_link_add_one_symbol
3071 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
3072 (bfd_vma
) 0, (const char *) NULL
, false,
3073 get_elf_backend_data (dynobj
)->collect
,
3074 (struct bfd_link_hash_entry
**) &h
)))
3076 h
->elf_link_hash_flags
&= ~ ELF_LINK_NON_ELF
;
3077 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3078 h
->type
= STT_OBJECT
;
3079 h
->verinfo
.vertree
= t
;
3081 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
3084 def
.vd_version
= VER_DEF_CURRENT
;
3086 if (t
->globals
== NULL
&& t
->locals
== NULL
&& ! t
->used
)
3087 def
.vd_flags
|= VER_FLG_WEAK
;
3088 def
.vd_ndx
= t
->vernum
+ 1;
3089 def
.vd_cnt
= cdeps
+ 1;
3090 def
.vd_hash
= bfd_elf_hash (t
->name
);
3091 def
.vd_aux
= sizeof (Elf_External_Verdef
);
3092 if (t
->next
!= NULL
)
3093 def
.vd_next
= (sizeof (Elf_External_Verdef
)
3094 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
3098 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
3099 (Elf_External_Verdef
*) p
);
3100 p
+= sizeof (Elf_External_Verdef
);
3102 defaux
.vda_name
= h
->dynstr_index
;
3103 if (t
->deps
== NULL
)
3104 defaux
.vda_next
= 0;
3106 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
3107 t
->name_indx
= defaux
.vda_name
;
3109 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3110 (Elf_External_Verdaux
*) p
);
3111 p
+= sizeof (Elf_External_Verdaux
);
3113 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
3115 if (n
->version_needed
== NULL
)
3117 /* This can happen if there was an error in the
3119 defaux
.vda_name
= 0;
3122 defaux
.vda_name
= n
->version_needed
->name_indx
;
3123 if (n
->next
== NULL
)
3124 defaux
.vda_next
= 0;
3126 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
3128 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
3129 (Elf_External_Verdaux
*) p
);
3130 p
+= sizeof (Elf_External_Verdaux
);
3134 if (! elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
3135 || ! elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
3138 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
3141 if (info
->new_dtags
&& info
->flags
)
3143 if (! elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
3150 info
->flags_1
&= ~ (DF_1_INITFIRST
3153 if (! elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
3157 /* Work out the size of the version reference section. */
3159 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
3160 BFD_ASSERT (s
!= NULL
);
3162 struct elf_find_verdep_info sinfo
;
3164 sinfo
.output_bfd
= output_bfd
;
3166 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
3167 if (sinfo
.vers
== 0)
3169 sinfo
.failed
= false;
3171 elf_link_hash_traverse (elf_hash_table (info
),
3172 elf_link_find_version_dependencies
,
3175 if (elf_tdata (output_bfd
)->verref
== NULL
)
3176 _bfd_strip_section_from_output (info
, s
);
3179 Elf_Internal_Verneed
*t
;
3184 /* Build the version definition section. */
3187 for (t
= elf_tdata (output_bfd
)->verref
;
3191 Elf_Internal_Vernaux
*a
;
3193 size
+= sizeof (Elf_External_Verneed
);
3195 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3196 size
+= sizeof (Elf_External_Vernaux
);
3199 s
->_raw_size
= size
;
3200 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, size
);
3201 if (s
->contents
== NULL
)
3205 for (t
= elf_tdata (output_bfd
)->verref
;
3210 Elf_Internal_Vernaux
*a
;
3214 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3217 t
->vn_version
= VER_NEED_CURRENT
;
3219 if (elf_dt_name (t
->vn_bfd
) != NULL
)
3220 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
3221 elf_dt_name (t
->vn_bfd
),
3224 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
3225 t
->vn_bfd
->filename
, true, false);
3226 if (indx
== (bfd_size_type
) -1)
3229 t
->vn_aux
= sizeof (Elf_External_Verneed
);
3230 if (t
->vn_nextref
== NULL
)
3233 t
->vn_next
= (sizeof (Elf_External_Verneed
)
3234 + caux
* sizeof (Elf_External_Vernaux
));
3236 _bfd_elf_swap_verneed_out (output_bfd
, t
,
3237 (Elf_External_Verneed
*) p
);
3238 p
+= sizeof (Elf_External_Verneed
);
3240 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3242 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
3243 indx
= _bfd_stringtab_add (elf_hash_table (info
)->dynstr
,
3244 a
->vna_nodename
, true, false);
3245 if (indx
== (bfd_size_type
) -1)
3248 if (a
->vna_nextptr
== NULL
)
3251 a
->vna_next
= sizeof (Elf_External_Vernaux
);
3253 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
3254 (Elf_External_Vernaux
*) p
);
3255 p
+= sizeof (Elf_External_Vernaux
);
3259 if (! elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
3260 || ! elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
3263 elf_tdata (output_bfd
)->cverrefs
= crefs
;
3267 /* Assign dynsym indicies. In a shared library we generate a
3268 section symbol for each output section, which come first.
3269 Next come all of the back-end allocated local dynamic syms,
3270 followed by the rest of the global symbols. */
3272 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
3274 /* Work out the size of the symbol version section. */
3275 s
= bfd_get_section_by_name (dynobj
, ".gnu.version");
3276 BFD_ASSERT (s
!= NULL
);
3277 if (dynsymcount
== 0
3278 || (verdefs
== NULL
&& elf_tdata (output_bfd
)->verref
== NULL
))
3280 _bfd_strip_section_from_output (info
, s
);
3281 /* The DYNSYMCOUNT might have changed if we were going to
3282 output a dynamic symbol table entry for S. */
3283 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
3287 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Versym
);
3288 s
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, s
->_raw_size
);
3289 if (s
->contents
== NULL
)
3292 if (! elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
3296 /* Set the size of the .dynsym and .hash sections. We counted
3297 the number of dynamic symbols in elf_link_add_object_symbols.
3298 We will build the contents of .dynsym and .hash when we build
3299 the final symbol table, because until then we do not know the
3300 correct value to give the symbols. We built the .dynstr
3301 section as we went along in elf_link_add_object_symbols. */
3302 s
= bfd_get_section_by_name (dynobj
, ".dynsym");
3303 BFD_ASSERT (s
!= NULL
);
3304 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Sym
);
3305 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3306 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
3309 /* The first entry in .dynsym is a dummy symbol. */
3316 elf_swap_symbol_out (output_bfd
, &isym
,
3317 (PTR
) (Elf_External_Sym
*) s
->contents
);
3319 /* Compute the size of the hashing table. As a side effect this
3320 computes the hash values for all the names we export. */
3321 bucketcount
= compute_bucket_count (info
);
3323 s
= bfd_get_section_by_name (dynobj
, ".hash");
3324 BFD_ASSERT (s
!= NULL
);
3325 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
3326 s
->_raw_size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
3327 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
3328 if (s
->contents
== NULL
)
3330 memset (s
->contents
, 0, (size_t) s
->_raw_size
);
3332 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
3333 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
3334 s
->contents
+ hash_entry_size
);
3336 elf_hash_table (info
)->bucketcount
= bucketcount
;
3338 s
= bfd_get_section_by_name (dynobj
, ".dynstr");
3339 BFD_ASSERT (s
!= NULL
);
3340 s
->_raw_size
= _bfd_stringtab_size (elf_hash_table (info
)->dynstr
);
3342 if (! elf_add_dynamic_entry (info
, DT_NULL
, 0))
3349 /* Fix up the flags for a symbol. This handles various cases which
3350 can only be fixed after all the input files are seen. This is
3351 currently called by both adjust_dynamic_symbol and
3352 assign_sym_version, which is unnecessary but perhaps more robust in
3353 the face of future changes. */
3356 elf_fix_symbol_flags (h
, eif
)
3357 struct elf_link_hash_entry
*h
;
3358 struct elf_info_failed
*eif
;
3360 /* If this symbol was mentioned in a non-ELF file, try to set
3361 DEF_REGULAR and REF_REGULAR correctly. This is the only way to
3362 permit a non-ELF file to correctly refer to a symbol defined in
3363 an ELF dynamic object. */
3364 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_ELF
) != 0)
3366 while (h
->root
.type
== bfd_link_hash_indirect
)
3367 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3369 if (h
->root
.type
!= bfd_link_hash_defined
3370 && h
->root
.type
!= bfd_link_hash_defweak
)
3371 h
->elf_link_hash_flags
|= (ELF_LINK_HASH_REF_REGULAR
3372 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
);
3375 if (h
->root
.u
.def
.section
->owner
!= NULL
3376 && (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
3377 == bfd_target_elf_flavour
))
3378 h
->elf_link_hash_flags
|= (ELF_LINK_HASH_REF_REGULAR
3379 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
);
3381 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3384 if (h
->dynindx
== -1
3385 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
3386 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0))
3388 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
3397 /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol
3398 was first seen in a non-ELF file. Fortunately, if the symbol
3399 was first seen in an ELF file, we're probably OK unless the
3400 symbol was defined in a non-ELF file. Catch that case here.
3401 FIXME: We're still in trouble if the symbol was first seen in
3402 a dynamic object, and then later in a non-ELF regular object. */
3403 if ((h
->root
.type
== bfd_link_hash_defined
3404 || h
->root
.type
== bfd_link_hash_defweak
)
3405 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
3406 && (h
->root
.u
.def
.section
->owner
!= NULL
3407 ? (bfd_get_flavour (h
->root
.u
.def
.section
->owner
)
3408 != bfd_target_elf_flavour
)
3409 : (bfd_is_abs_section (h
->root
.u
.def
.section
)
3410 && (h
->elf_link_hash_flags
3411 & ELF_LINK_HASH_DEF_DYNAMIC
) == 0)))
3412 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3415 /* If this is a final link, and the symbol was defined as a common
3416 symbol in a regular object file, and there was no definition in
3417 any dynamic object, then the linker will have allocated space for
3418 the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR
3419 flag will not have been set. */
3420 if (h
->root
.type
== bfd_link_hash_defined
3421 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
3422 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
3423 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3424 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
3425 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
3427 /* If -Bsymbolic was used (which means to bind references to global
3428 symbols to the definition within the shared object), and this
3429 symbol was defined in a regular object, then it actually doesn't
3430 need a PLT entry. Likewise, if the symbol has any kind of
3431 visibility (internal, hidden, or protected), it doesn't need a
3433 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0
3434 && eif
->info
->shared
3435 && (eif
->info
->symbolic
|| ELF_ST_VISIBILITY (h
->other
))
3436 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3438 h
->elf_link_hash_flags
&=~ ELF_LINK_HASH_NEEDS_PLT
;
3439 h
->plt
.offset
= (bfd_vma
) -1;
3442 /* If this is a weak defined symbol in a dynamic object, and we know
3443 the real definition in the dynamic object, copy interesting flags
3444 over to the real definition. */
3445 if (h
->weakdef
!= NULL
)
3447 struct elf_link_hash_entry
*weakdef
;
3449 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
3450 || h
->root
.type
== bfd_link_hash_defweak
);
3451 weakdef
= h
->weakdef
;
3452 BFD_ASSERT (weakdef
->root
.type
== bfd_link_hash_defined
3453 || weakdef
->root
.type
== bfd_link_hash_defweak
);
3454 BFD_ASSERT (weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
);
3456 /* If the real definition is defined by a regular object file,
3457 don't do anything special. See the longer description in
3458 elf_adjust_dynamic_symbol, below. */
3459 if ((weakdef
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0)
3462 weakdef
->elf_link_hash_flags
|=
3463 (h
->elf_link_hash_flags
3464 & (ELF_LINK_HASH_REF_REGULAR
3465 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
3466 | ELF_LINK_NON_GOT_REF
));
3472 /* Make the backend pick a good value for a dynamic symbol. This is
3473 called via elf_link_hash_traverse, and also calls itself
3477 elf_adjust_dynamic_symbol (h
, data
)
3478 struct elf_link_hash_entry
*h
;
3481 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
3483 struct elf_backend_data
*bed
;
3485 /* Ignore indirect symbols. These are added by the versioning code. */
3486 if (h
->root
.type
== bfd_link_hash_indirect
)
3489 /* Fix the symbol flags. */
3490 if (! elf_fix_symbol_flags (h
, eif
))
3493 /* If this symbol does not require a PLT entry, and it is not
3494 defined by a dynamic object, or is not referenced by a regular
3495 object, ignore it. We do have to handle a weak defined symbol,
3496 even if no regular object refers to it, if we decided to add it
3497 to the dynamic symbol table. FIXME: Do we normally need to worry
3498 about symbols which are defined by one dynamic object and
3499 referenced by another one? */
3500 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) == 0
3501 && ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
3502 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3503 || ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0
3504 && (h
->weakdef
== NULL
|| h
->weakdef
->dynindx
== -1))))
3506 h
->plt
.offset
= (bfd_vma
) -1;
3510 /* If we've already adjusted this symbol, don't do it again. This
3511 can happen via a recursive call. */
3512 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DYNAMIC_ADJUSTED
) != 0)
3515 /* Don't look at this symbol again. Note that we must set this
3516 after checking the above conditions, because we may look at a
3517 symbol once, decide not to do anything, and then get called
3518 recursively later after REF_REGULAR is set below. */
3519 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DYNAMIC_ADJUSTED
;
3521 /* If this is a weak definition, and we know a real definition, and
3522 the real symbol is not itself defined by a regular object file,
3523 then get a good value for the real definition. We handle the
3524 real symbol first, for the convenience of the backend routine.
3526 Note that there is a confusing case here. If the real definition
3527 is defined by a regular object file, we don't get the real symbol
3528 from the dynamic object, but we do get the weak symbol. If the
3529 processor backend uses a COPY reloc, then if some routine in the
3530 dynamic object changes the real symbol, we will not see that
3531 change in the corresponding weak symbol. This is the way other
3532 ELF linkers work as well, and seems to be a result of the shared
3535 I will clarify this issue. Most SVR4 shared libraries define the
3536 variable _timezone and define timezone as a weak synonym. The
3537 tzset call changes _timezone. If you write
3538 extern int timezone;
3540 int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
3541 you might expect that, since timezone is a synonym for _timezone,
3542 the same number will print both times. However, if the processor
3543 backend uses a COPY reloc, then actually timezone will be copied
3544 into your process image, and, since you define _timezone
3545 yourself, _timezone will not. Thus timezone and _timezone will
3546 wind up at different memory locations. The tzset call will set
3547 _timezone, leaving timezone unchanged. */
3549 if (h
->weakdef
!= NULL
)
3551 /* If we get to this point, we know there is an implicit
3552 reference by a regular object file via the weak symbol H.
3553 FIXME: Is this really true? What if the traversal finds
3554 H->WEAKDEF before it finds H? */
3555 h
->weakdef
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
3557 if (! elf_adjust_dynamic_symbol (h
->weakdef
, (PTR
) eif
))
3561 /* If a symbol has no type and no size and does not require a PLT
3562 entry, then we are probably about to do the wrong thing here: we
3563 are probably going to create a COPY reloc for an empty object.
3564 This case can arise when a shared object is built with assembly
3565 code, and the assembly code fails to set the symbol type. */
3567 && h
->type
== STT_NOTYPE
3568 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) == 0)
3569 (*_bfd_error_handler
)
3570 (_("warning: type and size of dynamic symbol `%s' are not defined"),
3571 h
->root
.root
.string
);
3573 dynobj
= elf_hash_table (eif
->info
)->dynobj
;
3574 bed
= get_elf_backend_data (dynobj
);
3575 if (! (*bed
->elf_backend_adjust_dynamic_symbol
) (eif
->info
, h
))
3584 /* This routine is used to export all defined symbols into the dynamic
3585 symbol table. It is called via elf_link_hash_traverse. */
3588 elf_export_symbol (h
, data
)
3589 struct elf_link_hash_entry
*h
;
3592 struct elf_info_failed
*eif
= (struct elf_info_failed
*) data
;
3594 /* Ignore indirect symbols. These are added by the versioning code. */
3595 if (h
->root
.type
== bfd_link_hash_indirect
)
3598 if (h
->dynindx
== -1
3599 && (h
->elf_link_hash_flags
3600 & (ELF_LINK_HASH_DEF_REGULAR
| ELF_LINK_HASH_REF_REGULAR
)) != 0)
3602 if (! _bfd_elf_link_record_dynamic_symbol (eif
->info
, h
))
3612 /* Look through the symbols which are defined in other shared
3613 libraries and referenced here. Update the list of version
3614 dependencies. This will be put into the .gnu.version_r section.
3615 This function is called via elf_link_hash_traverse. */
3618 elf_link_find_version_dependencies (h
, data
)
3619 struct elf_link_hash_entry
*h
;
3622 struct elf_find_verdep_info
*rinfo
= (struct elf_find_verdep_info
*) data
;
3623 Elf_Internal_Verneed
*t
;
3624 Elf_Internal_Vernaux
*a
;
3626 /* We only care about symbols defined in shared objects with version
3628 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
3629 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) != 0
3631 || h
->verinfo
.verdef
== NULL
)
3634 /* See if we already know about this version. */
3635 for (t
= elf_tdata (rinfo
->output_bfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
3637 if (t
->vn_bfd
!= h
->verinfo
.verdef
->vd_bfd
)
3640 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
3641 if (a
->vna_nodename
== h
->verinfo
.verdef
->vd_nodename
)
3647 /* This is a new version. Add it to tree we are building. */
3651 t
= (Elf_Internal_Verneed
*) bfd_zalloc (rinfo
->output_bfd
, sizeof *t
);
3654 rinfo
->failed
= true;
3658 t
->vn_bfd
= h
->verinfo
.verdef
->vd_bfd
;
3659 t
->vn_nextref
= elf_tdata (rinfo
->output_bfd
)->verref
;
3660 elf_tdata (rinfo
->output_bfd
)->verref
= t
;
3663 a
= (Elf_Internal_Vernaux
*) bfd_zalloc (rinfo
->output_bfd
, sizeof *a
);
3665 /* Note that we are copying a string pointer here, and testing it
3666 above. If bfd_elf_string_from_elf_section is ever changed to
3667 discard the string data when low in memory, this will have to be
3669 a
->vna_nodename
= h
->verinfo
.verdef
->vd_nodename
;
3671 a
->vna_flags
= h
->verinfo
.verdef
->vd_flags
;
3672 a
->vna_nextptr
= t
->vn_auxptr
;
3674 h
->verinfo
.verdef
->vd_exp_refno
= rinfo
->vers
;
3677 a
->vna_other
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
3684 /* Figure out appropriate versions for all the symbols. We may not
3685 have the version number script until we have read all of the input
3686 files, so until that point we don't know which symbols should be
3687 local. This function is called via elf_link_hash_traverse. */
3690 elf_link_assign_sym_version (h
, data
)
3691 struct elf_link_hash_entry
*h
;
3694 struct elf_assign_sym_version_info
*sinfo
=
3695 (struct elf_assign_sym_version_info
*) data
;
3696 struct bfd_link_info
*info
= sinfo
->info
;
3697 struct elf_backend_data
*bed
;
3698 struct elf_info_failed eif
;
3701 /* Fix the symbol flags. */
3704 if (! elf_fix_symbol_flags (h
, &eif
))
3707 sinfo
->failed
= true;
3711 /* We only need version numbers for symbols defined in regular
3713 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
3716 bed
= get_elf_backend_data (sinfo
->output_bfd
);
3717 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
3718 if (p
!= NULL
&& h
->verinfo
.vertree
== NULL
)
3720 struct bfd_elf_version_tree
*t
;
3725 /* There are two consecutive ELF_VER_CHR characters if this is
3726 not a hidden symbol. */
3728 if (*p
== ELF_VER_CHR
)
3734 /* If there is no version string, we can just return out. */
3738 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
3742 /* Look for the version. If we find it, it is no longer weak. */
3743 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
3745 if (strcmp (t
->name
, p
) == 0)
3749 struct bfd_elf_version_expr
*d
;
3751 len
= p
- h
->root
.root
.string
;
3752 alc
= bfd_alloc (sinfo
->output_bfd
, len
);
3755 strncpy (alc
, h
->root
.root
.string
, len
- 1);
3756 alc
[len
- 1] = '\0';
3757 if (alc
[len
- 2] == ELF_VER_CHR
)
3758 alc
[len
- 2] = '\0';
3760 h
->verinfo
.vertree
= t
;
3764 if (t
->globals
!= NULL
)
3766 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3767 if ((*d
->match
) (d
, alc
))
3771 /* See if there is anything to force this symbol to
3773 if (d
== NULL
&& t
->locals
!= NULL
)
3775 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
3777 if ((*d
->match
) (d
, alc
))
3779 if (h
->dynindx
!= -1
3781 && ! sinfo
->export_dynamic
)
3783 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
3784 (*bed
->elf_backend_hide_symbol
) (info
, h
);
3785 /* FIXME: The name of the symbol has
3786 already been recorded in the dynamic
3787 string table section. */
3795 bfd_release (sinfo
->output_bfd
, alc
);
3800 /* If we are building an application, we need to create a
3801 version node for this version. */
3802 if (t
== NULL
&& ! info
->shared
)
3804 struct bfd_elf_version_tree
**pp
;
3807 /* If we aren't going to export this symbol, we don't need
3808 to worry about it. */
3809 if (h
->dynindx
== -1)
3812 t
= ((struct bfd_elf_version_tree
*)
3813 bfd_alloc (sinfo
->output_bfd
, sizeof *t
));
3816 sinfo
->failed
= true;
3825 t
->name_indx
= (unsigned int) -1;
3829 for (pp
= &sinfo
->verdefs
; *pp
!= NULL
; pp
= &(*pp
)->next
)
3831 t
->vernum
= version_index
;
3835 h
->verinfo
.vertree
= t
;
3839 /* We could not find the version for a symbol when
3840 generating a shared archive. Return an error. */
3841 (*_bfd_error_handler
)
3842 (_("%s: undefined versioned symbol name %s"),
3843 bfd_get_filename (sinfo
->output_bfd
), h
->root
.root
.string
);
3844 bfd_set_error (bfd_error_bad_value
);
3845 sinfo
->failed
= true;
3850 h
->elf_link_hash_flags
|= ELF_LINK_HIDDEN
;
3853 /* If we don't have a version for this symbol, see if we can find
3855 if (h
->verinfo
.vertree
== NULL
&& sinfo
->verdefs
!= NULL
)
3857 struct bfd_elf_version_tree
*t
;
3858 struct bfd_elf_version_tree
*deflt
;
3859 struct bfd_elf_version_expr
*d
;
3861 /* See if can find what version this symbol is in. If the
3862 symbol is supposed to be local, then don't actually register
3865 for (t
= sinfo
->verdefs
; t
!= NULL
; t
= t
->next
)
3867 if (t
->globals
!= NULL
)
3869 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
3871 if ((*d
->match
) (d
, h
->root
.root
.string
))
3873 h
->verinfo
.vertree
= t
;
3882 if (t
->locals
!= NULL
)
3884 for (d
= t
->locals
; d
!= NULL
; d
= d
->next
)
3886 if (d
->pattern
[0] == '*' && d
->pattern
[1] == '\0')
3888 else if ((*d
->match
) (d
, h
->root
.root
.string
))
3890 h
->verinfo
.vertree
= t
;
3891 if (h
->dynindx
!= -1
3893 && ! sinfo
->export_dynamic
)
3895 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
3896 (*bed
->elf_backend_hide_symbol
) (info
, h
);
3897 /* FIXME: The name of the symbol has already
3898 been recorded in the dynamic string table
3910 if (deflt
!= NULL
&& h
->verinfo
.vertree
== NULL
)
3912 h
->verinfo
.vertree
= deflt
;
3913 if (h
->dynindx
!= -1
3915 && ! sinfo
->export_dynamic
)
3917 h
->elf_link_hash_flags
|= ELF_LINK_FORCED_LOCAL
;
3918 (*bed
->elf_backend_hide_symbol
) (info
, h
);
3919 /* FIXME: The name of the symbol has already been
3920 recorded in the dynamic string table section. */
3928 /* Final phase of ELF linker. */
3930 /* A structure we use to avoid passing large numbers of arguments. */
3932 struct elf_final_link_info
3934 /* General link information. */
3935 struct bfd_link_info
*info
;
3938 /* Symbol string table. */
3939 struct bfd_strtab_hash
*symstrtab
;
3940 /* .dynsym section. */
3941 asection
*dynsym_sec
;
3942 /* .hash section. */
3944 /* symbol version section (.gnu.version). */
3945 asection
*symver_sec
;
3946 /* Buffer large enough to hold contents of any section. */
3948 /* Buffer large enough to hold external relocs of any section. */
3949 PTR external_relocs
;
3950 /* Buffer large enough to hold internal relocs of any section. */
3951 Elf_Internal_Rela
*internal_relocs
;
3952 /* Buffer large enough to hold external local symbols of any input
3954 Elf_External_Sym
*external_syms
;
3955 /* Buffer large enough to hold internal local symbols of any input
3957 Elf_Internal_Sym
*internal_syms
;
3958 /* Array large enough to hold a symbol index for each local symbol
3959 of any input BFD. */
3961 /* Array large enough to hold a section pointer for each local
3962 symbol of any input BFD. */
3963 asection
**sections
;
3964 /* Buffer to hold swapped out symbols. */
3965 Elf_External_Sym
*symbuf
;
3966 /* Number of swapped out symbols in buffer. */
3967 size_t symbuf_count
;
3968 /* Number of symbols which fit in symbuf. */
3972 static boolean elf_link_output_sym
3973 PARAMS ((struct elf_final_link_info
*, const char *,
3974 Elf_Internal_Sym
*, asection
*));
3975 static boolean elf_link_flush_output_syms
3976 PARAMS ((struct elf_final_link_info
*));
3977 static boolean elf_link_output_extsym
3978 PARAMS ((struct elf_link_hash_entry
*, PTR
));
3979 static boolean elf_link_input_bfd
3980 PARAMS ((struct elf_final_link_info
*, bfd
*));
3981 static boolean elf_reloc_link_order
3982 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
3983 struct bfd_link_order
*));
3985 /* This struct is used to pass information to elf_link_output_extsym. */
3987 struct elf_outext_info
3991 struct elf_final_link_info
*finfo
;
3994 /* Compute the size of, and allocate space for, REL_HDR which is the
3995 section header for a section containing relocations for O. */
3998 elf_link_size_reloc_section (abfd
, rel_hdr
, o
)
4000 Elf_Internal_Shdr
*rel_hdr
;
4003 register struct elf_link_hash_entry
**p
, **pend
;
4004 unsigned reloc_count
;
4006 /* Figure out how many relocations there will be. */
4007 if (rel_hdr
== &elf_section_data (o
)->rel_hdr
)
4008 reloc_count
= elf_section_data (o
)->rel_count
;
4010 reloc_count
= elf_section_data (o
)->rel_count2
;
4012 /* That allows us to calculate the size of the section. */
4013 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
* reloc_count
;
4015 /* The contents field must last into write_object_contents, so we
4016 allocate it with bfd_alloc rather than malloc. Also since we
4017 cannot be sure that the contents will actually be filled in,
4018 we zero the allocated space. */
4019 rel_hdr
->contents
= (PTR
) bfd_zalloc (abfd
, rel_hdr
->sh_size
);
4020 if (rel_hdr
->contents
== NULL
&& rel_hdr
->sh_size
!= 0)
4023 /* We only allocate one set of hash entries, so we only do it the
4024 first time we are called. */
4025 if (elf_section_data (o
)->rel_hashes
== NULL
)
4027 p
= ((struct elf_link_hash_entry
**)
4028 bfd_malloc (o
->reloc_count
4029 * sizeof (struct elf_link_hash_entry
*)));
4030 if (p
== NULL
&& o
->reloc_count
!= 0)
4033 elf_section_data (o
)->rel_hashes
= p
;
4034 pend
= p
+ o
->reloc_count
;
4035 for (; p
< pend
; p
++)
4042 /* When performing a relocateable link, the input relocations are
4043 preserved. But, if they reference global symbols, the indices
4044 referenced must be updated. Update all the relocations in
4045 REL_HDR (there are COUNT of them), using the data in REL_HASH. */
4048 elf_link_adjust_relocs (abfd
, rel_hdr
, count
, rel_hash
)
4050 Elf_Internal_Shdr
*rel_hdr
;
4052 struct elf_link_hash_entry
**rel_hash
;
4055 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4057 for (i
= 0; i
< count
; i
++, rel_hash
++)
4059 if (*rel_hash
== NULL
)
4062 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
4064 if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
4066 Elf_External_Rel
*erel
;
4067 Elf_Internal_Rel irel
;
4069 erel
= (Elf_External_Rel
*) rel_hdr
->contents
+ i
;
4070 if (bed
->s
->swap_reloc_in
)
4071 (*bed
->s
->swap_reloc_in
) (abfd
, (bfd_byte
*) erel
, &irel
);
4073 elf_swap_reloc_in (abfd
, erel
, &irel
);
4074 irel
.r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
4075 ELF_R_TYPE (irel
.r_info
));
4076 if (bed
->s
->swap_reloc_out
)
4077 (*bed
->s
->swap_reloc_out
) (abfd
, &irel
, (bfd_byte
*) erel
);
4079 elf_swap_reloc_out (abfd
, &irel
, erel
);
4083 Elf_External_Rela
*erela
;
4084 Elf_Internal_Rela irela
;
4086 BFD_ASSERT (rel_hdr
->sh_entsize
4087 == sizeof (Elf_External_Rela
));
4089 erela
= (Elf_External_Rela
*) rel_hdr
->contents
+ i
;
4090 if (bed
->s
->swap_reloca_in
)
4091 (*bed
->s
->swap_reloca_in
) (abfd
, (bfd_byte
*) erela
, &irela
);
4093 elf_swap_reloca_in (abfd
, erela
, &irela
);
4094 irela
.r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
4095 ELF_R_TYPE (irela
.r_info
));
4096 if (bed
->s
->swap_reloca_out
)
4097 (*bed
->s
->swap_reloca_out
) (abfd
, &irela
, (bfd_byte
*) erela
);
4099 elf_swap_reloca_out (abfd
, &irela
, erela
);
4104 /* Do the final step of an ELF link. */
4107 elf_bfd_final_link (abfd
, info
)
4109 struct bfd_link_info
*info
;
4113 struct elf_final_link_info finfo
;
4114 register asection
*o
;
4115 register struct bfd_link_order
*p
;
4117 size_t max_contents_size
;
4118 size_t max_external_reloc_size
;
4119 size_t max_internal_reloc_count
;
4120 size_t max_sym_count
;
4122 Elf_Internal_Sym elfsym
;
4124 Elf_Internal_Shdr
*symtab_hdr
;
4125 Elf_Internal_Shdr
*symstrtab_hdr
;
4126 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4127 struct elf_outext_info eoinfo
;
4130 abfd
->flags
|= DYNAMIC
;
4132 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
4133 dynobj
= elf_hash_table (info
)->dynobj
;
4136 finfo
.output_bfd
= abfd
;
4137 finfo
.symstrtab
= elf_stringtab_init ();
4138 if (finfo
.symstrtab
== NULL
)
4143 finfo
.dynsym_sec
= NULL
;
4144 finfo
.hash_sec
= NULL
;
4145 finfo
.symver_sec
= NULL
;
4149 finfo
.dynsym_sec
= bfd_get_section_by_name (dynobj
, ".dynsym");
4150 finfo
.hash_sec
= bfd_get_section_by_name (dynobj
, ".hash");
4151 BFD_ASSERT (finfo
.dynsym_sec
!= NULL
&& finfo
.hash_sec
!= NULL
);
4152 finfo
.symver_sec
= bfd_get_section_by_name (dynobj
, ".gnu.version");
4153 /* Note that it is OK if symver_sec is NULL. */
4156 finfo
.contents
= NULL
;
4157 finfo
.external_relocs
= NULL
;
4158 finfo
.internal_relocs
= NULL
;
4159 finfo
.external_syms
= NULL
;
4160 finfo
.internal_syms
= NULL
;
4161 finfo
.indices
= NULL
;
4162 finfo
.sections
= NULL
;
4163 finfo
.symbuf
= NULL
;
4164 finfo
.symbuf_count
= 0;
4166 /* Count up the number of relocations we will output for each output
4167 section, so that we know the sizes of the reloc sections. We
4168 also figure out some maximum sizes. */
4169 max_contents_size
= 0;
4170 max_external_reloc_size
= 0;
4171 max_internal_reloc_count
= 0;
4173 for (o
= abfd
->sections
; o
!= (asection
*) NULL
; o
= o
->next
)
4177 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
4179 if (p
->type
== bfd_section_reloc_link_order
4180 || p
->type
== bfd_symbol_reloc_link_order
)
4182 else if (p
->type
== bfd_indirect_link_order
)
4186 sec
= p
->u
.indirect
.section
;
4188 /* Mark all sections which are to be included in the
4189 link. This will normally be every section. We need
4190 to do this so that we can identify any sections which
4191 the linker has decided to not include. */
4192 sec
->linker_mark
= true;
4194 if (info
->relocateable
|| info
->emitrelocations
)
4195 o
->reloc_count
+= sec
->reloc_count
;
4197 if (sec
->_raw_size
> max_contents_size
)
4198 max_contents_size
= sec
->_raw_size
;
4199 if (sec
->_cooked_size
> max_contents_size
)
4200 max_contents_size
= sec
->_cooked_size
;
4202 /* We are interested in just local symbols, not all
4204 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
4205 && (sec
->owner
->flags
& DYNAMIC
) == 0)
4209 if (elf_bad_symtab (sec
->owner
))
4210 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
4211 / sizeof (Elf_External_Sym
));
4213 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
4215 if (sym_count
> max_sym_count
)
4216 max_sym_count
= sym_count
;
4218 if ((sec
->flags
& SEC_RELOC
) != 0)
4222 ext_size
= elf_section_data (sec
)->rel_hdr
.sh_size
;
4223 if (ext_size
> max_external_reloc_size
)
4224 max_external_reloc_size
= ext_size
;
4225 if (sec
->reloc_count
> max_internal_reloc_count
)
4226 max_internal_reloc_count
= sec
->reloc_count
;
4232 if (o
->reloc_count
> 0)
4233 o
->flags
|= SEC_RELOC
;
4236 /* Explicitly clear the SEC_RELOC flag. The linker tends to
4237 set it (this is probably a bug) and if it is set
4238 assign_section_numbers will create a reloc section. */
4239 o
->flags
&=~ SEC_RELOC
;
4242 /* If the SEC_ALLOC flag is not set, force the section VMA to
4243 zero. This is done in elf_fake_sections as well, but forcing
4244 the VMA to 0 here will ensure that relocs against these
4245 sections are handled correctly. */
4246 if ((o
->flags
& SEC_ALLOC
) == 0
4247 && ! o
->user_set_vma
)
4251 /* Figure out the file positions for everything but the symbol table
4252 and the relocs. We set symcount to force assign_section_numbers
4253 to create a symbol table. */
4254 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
4255 BFD_ASSERT (! abfd
->output_has_begun
);
4256 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
4259 /* Figure out how many relocations we will have in each section.
4260 Just using RELOC_COUNT isn't good enough since that doesn't
4261 maintain a separate value for REL vs. RELA relocations. */
4262 if (info
->relocateable
|| info
->emitrelocations
)
4263 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
4264 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
4266 asection
*output_section
;
4268 if (! o
->linker_mark
)
4270 /* This section was omitted from the link. */
4274 output_section
= o
->output_section
;
4276 if (output_section
!= NULL
4277 && (o
->flags
& SEC_RELOC
) != 0)
4279 struct bfd_elf_section_data
*esdi
4280 = elf_section_data (o
);
4281 struct bfd_elf_section_data
*esdo
4282 = elf_section_data (output_section
);
4283 unsigned int *rel_count
;
4284 unsigned int *rel_count2
;
4286 /* We must be careful to add the relocation froms the
4287 input section to the right output count. */
4288 if (esdi
->rel_hdr
.sh_entsize
== esdo
->rel_hdr
.sh_entsize
)
4290 rel_count
= &esdo
->rel_count
;
4291 rel_count2
= &esdo
->rel_count2
;
4295 rel_count
= &esdo
->rel_count2
;
4296 rel_count2
= &esdo
->rel_count
;
4299 *rel_count
+= (esdi
->rel_hdr
.sh_size
4300 / esdi
->rel_hdr
.sh_entsize
);
4302 *rel_count2
+= (esdi
->rel_hdr2
->sh_size
4303 / esdi
->rel_hdr2
->sh_entsize
);
4307 /* That created the reloc sections. Set their sizes, and assign
4308 them file positions, and allocate some buffers. */
4309 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4311 if ((o
->flags
& SEC_RELOC
) != 0)
4313 if (!elf_link_size_reloc_section (abfd
,
4314 &elf_section_data (o
)->rel_hdr
,
4318 if (elf_section_data (o
)->rel_hdr2
4319 && !elf_link_size_reloc_section (abfd
,
4320 elf_section_data (o
)->rel_hdr2
,
4325 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
4326 to count upwards while actually outputting the relocations. */
4327 elf_section_data (o
)->rel_count
= 0;
4328 elf_section_data (o
)->rel_count2
= 0;
4331 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4333 /* We have now assigned file positions for all the sections except
4334 .symtab and .strtab. We start the .symtab section at the current
4335 file position, and write directly to it. We build the .strtab
4336 section in memory. */
4337 bfd_get_symcount (abfd
) = 0;
4338 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
4339 /* sh_name is set in prep_headers. */
4340 symtab_hdr
->sh_type
= SHT_SYMTAB
;
4341 symtab_hdr
->sh_flags
= 0;
4342 symtab_hdr
->sh_addr
= 0;
4343 symtab_hdr
->sh_size
= 0;
4344 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
4345 /* sh_link is set in assign_section_numbers. */
4346 /* sh_info is set below. */
4347 /* sh_offset is set just below. */
4348 symtab_hdr
->sh_addralign
= 4; /* FIXME: system dependent? */
4350 off
= elf_tdata (abfd
)->next_file_pos
;
4351 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, true);
4353 /* Note that at this point elf_tdata (abfd)->next_file_pos is
4354 incorrect. We do not yet know the size of the .symtab section.
4355 We correct next_file_pos below, after we do know the size. */
4357 /* Allocate a buffer to hold swapped out symbols. This is to avoid
4358 continuously seeking to the right position in the file. */
4359 if (! info
->keep_memory
|| max_sym_count
< 20)
4360 finfo
.symbuf_size
= 20;
4362 finfo
.symbuf_size
= max_sym_count
;
4363 finfo
.symbuf
= ((Elf_External_Sym
*)
4364 bfd_malloc (finfo
.symbuf_size
* sizeof (Elf_External_Sym
)));
4365 if (finfo
.symbuf
== NULL
)
4368 /* Start writing out the symbol table. The first symbol is always a
4370 if (info
->strip
!= strip_all
|| info
->relocateable
|| info
->emitrelocations
)
4372 elfsym
.st_value
= 0;
4375 elfsym
.st_other
= 0;
4376 elfsym
.st_shndx
= SHN_UNDEF
;
4377 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
4378 &elfsym
, bfd_und_section_ptr
))
4383 /* Some standard ELF linkers do this, but we don't because it causes
4384 bootstrap comparison failures. */
4385 /* Output a file symbol for the output file as the second symbol.
4386 We output this even if we are discarding local symbols, although
4387 I'm not sure if this is correct. */
4388 elfsym
.st_value
= 0;
4390 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
4391 elfsym
.st_other
= 0;
4392 elfsym
.st_shndx
= SHN_ABS
;
4393 if (! elf_link_output_sym (&finfo
, bfd_get_filename (abfd
),
4394 &elfsym
, bfd_abs_section_ptr
))
4398 /* Output a symbol for each section. We output these even if we are
4399 discarding local symbols, since they are used for relocs. These
4400 symbols have no names. We store the index of each one in the
4401 index field of the section, so that we can find it again when
4402 outputting relocs. */
4403 if (info
->strip
!= strip_all
|| info
->relocateable
|| info
->emitrelocations
)
4406 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4407 elfsym
.st_other
= 0;
4408 for (i
= 1; i
< elf_elfheader (abfd
)->e_shnum
; i
++)
4410 o
= section_from_elf_index (abfd
, i
);
4412 o
->target_index
= bfd_get_symcount (abfd
);
4413 elfsym
.st_shndx
= i
;
4414 if (info
->relocateable
|| o
== NULL
)
4415 elfsym
.st_value
= 0;
4417 elfsym
.st_value
= o
->vma
;
4418 if (! elf_link_output_sym (&finfo
, (const char *) NULL
,
4424 /* Allocate some memory to hold information read in from the input
4426 finfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
4427 finfo
.external_relocs
= (PTR
) bfd_malloc (max_external_reloc_size
);
4428 finfo
.internal_relocs
= ((Elf_Internal_Rela
*)
4429 bfd_malloc (max_internal_reloc_count
4430 * sizeof (Elf_Internal_Rela
)
4431 * bed
->s
->int_rels_per_ext_rel
));
4432 finfo
.external_syms
= ((Elf_External_Sym
*)
4433 bfd_malloc (max_sym_count
4434 * sizeof (Elf_External_Sym
)));
4435 finfo
.internal_syms
= ((Elf_Internal_Sym
*)
4436 bfd_malloc (max_sym_count
4437 * sizeof (Elf_Internal_Sym
)));
4438 finfo
.indices
= (long *) bfd_malloc (max_sym_count
* sizeof (long));
4439 finfo
.sections
= ((asection
**)
4440 bfd_malloc (max_sym_count
* sizeof (asection
*)));
4441 if ((finfo
.contents
== NULL
&& max_contents_size
!= 0)
4442 || (finfo
.external_relocs
== NULL
&& max_external_reloc_size
!= 0)
4443 || (finfo
.internal_relocs
== NULL
&& max_internal_reloc_count
!= 0)
4444 || (finfo
.external_syms
== NULL
&& max_sym_count
!= 0)
4445 || (finfo
.internal_syms
== NULL
&& max_sym_count
!= 0)
4446 || (finfo
.indices
== NULL
&& max_sym_count
!= 0)
4447 || (finfo
.sections
== NULL
&& max_sym_count
!= 0))
4450 /* Since ELF permits relocations to be against local symbols, we
4451 must have the local symbols available when we do the relocations.
4452 Since we would rather only read the local symbols once, and we
4453 would rather not keep them in memory, we handle all the
4454 relocations for a single input file at the same time.
4456 Unfortunately, there is no way to know the total number of local
4457 symbols until we have seen all of them, and the local symbol
4458 indices precede the global symbol indices. This means that when
4459 we are generating relocateable output, and we see a reloc against
4460 a global symbol, we can not know the symbol index until we have
4461 finished examining all the local symbols to see which ones we are
4462 going to output. To deal with this, we keep the relocations in
4463 memory, and don't output them until the end of the link. This is
4464 an unfortunate waste of memory, but I don't see a good way around
4465 it. Fortunately, it only happens when performing a relocateable
4466 link, which is not the common case. FIXME: If keep_memory is set
4467 we could write the relocs out and then read them again; I don't
4468 know how bad the memory loss will be. */
4470 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
4471 sub
->output_has_begun
= false;
4472 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4474 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
4476 if (p
->type
== bfd_indirect_link_order
4477 && (bfd_get_flavour (p
->u
.indirect
.section
->owner
)
4478 == bfd_target_elf_flavour
))
4480 sub
= p
->u
.indirect
.section
->owner
;
4481 if (! sub
->output_has_begun
)
4483 if (! elf_link_input_bfd (&finfo
, sub
))
4485 sub
->output_has_begun
= true;
4488 else if (p
->type
== bfd_section_reloc_link_order
4489 || p
->type
== bfd_symbol_reloc_link_order
)
4491 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
4496 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
4502 /* That wrote out all the local symbols. Finish up the symbol table
4503 with the global symbols. Even if we want to strip everything we
4504 can, we still need to deal with those global symbols that got
4505 converted to local in a version script. */
4509 /* Output any global symbols that got converted to local in a
4510 version script. We do this in a separate step since ELF
4511 requires all local symbols to appear prior to any global
4512 symbols. FIXME: We should only do this if some global
4513 symbols were, in fact, converted to become local. FIXME:
4514 Will this work correctly with the Irix 5 linker? */
4515 eoinfo
.failed
= false;
4516 eoinfo
.finfo
= &finfo
;
4517 eoinfo
.localsyms
= true;
4518 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
4524 /* The sh_info field records the index of the first non local symbol. */
4525 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
4529 Elf_Internal_Sym sym
;
4530 Elf_External_Sym
*dynsym
=
4531 (Elf_External_Sym
*)finfo
.dynsym_sec
->contents
;
4532 long last_local
= 0;
4534 /* Write out the section symbols for the output sections. */
4541 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
4544 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4547 indx
= elf_section_data (s
)->this_idx
;
4548 BFD_ASSERT (indx
> 0);
4549 sym
.st_shndx
= indx
;
4550 sym
.st_value
= s
->vma
;
4552 elf_swap_symbol_out (abfd
, &sym
,
4553 dynsym
+ elf_section_data (s
)->dynindx
);
4556 last_local
= bfd_count_sections (abfd
);
4559 /* Write out the local dynsyms. */
4560 if (elf_hash_table (info
)->dynlocal
)
4562 struct elf_link_local_dynamic_entry
*e
;
4563 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
4567 sym
.st_size
= e
->isym
.st_size
;
4568 sym
.st_other
= e
->isym
.st_other
;
4570 /* Copy the internal symbol as is.
4571 Note that we saved a word of storage and overwrote
4572 the original st_name with the dynstr_index. */
4575 if (e
->isym
.st_shndx
> 0 && e
->isym
.st_shndx
< SHN_LORESERVE
)
4577 s
= bfd_section_from_elf_index (e
->input_bfd
,
4581 elf_section_data (s
->output_section
)->this_idx
;
4582 sym
.st_value
= (s
->output_section
->vma
4584 + e
->isym
.st_value
);
4587 if (last_local
< e
->dynindx
)
4588 last_local
= e
->dynindx
;
4590 elf_swap_symbol_out (abfd
, &sym
, dynsym
+ e
->dynindx
);
4594 elf_section_data (finfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
4598 /* We get the global symbols from the hash table. */
4599 eoinfo
.failed
= false;
4600 eoinfo
.localsyms
= false;
4601 eoinfo
.finfo
= &finfo
;
4602 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
4607 /* If backend needs to output some symbols not present in the hash
4608 table, do it now. */
4609 if (bed
->elf_backend_output_arch_syms
)
4611 if (! (*bed
->elf_backend_output_arch_syms
)
4612 (abfd
, info
, (PTR
) &finfo
,
4613 (boolean (*) PARAMS ((PTR
, const char *,
4614 Elf_Internal_Sym
*, asection
*)))
4615 elf_link_output_sym
))
4619 /* Flush all symbols to the file. */
4620 if (! elf_link_flush_output_syms (&finfo
))
4623 /* Now we know the size of the symtab section. */
4624 off
+= symtab_hdr
->sh_size
;
4626 /* Finish up and write out the symbol string table (.strtab)
4628 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
4629 /* sh_name was set in prep_headers. */
4630 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
4631 symstrtab_hdr
->sh_flags
= 0;
4632 symstrtab_hdr
->sh_addr
= 0;
4633 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (finfo
.symstrtab
);
4634 symstrtab_hdr
->sh_entsize
= 0;
4635 symstrtab_hdr
->sh_link
= 0;
4636 symstrtab_hdr
->sh_info
= 0;
4637 /* sh_offset is set just below. */
4638 symstrtab_hdr
->sh_addralign
= 1;
4640 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, true);
4641 elf_tdata (abfd
)->next_file_pos
= off
;
4643 if (bfd_get_symcount (abfd
) > 0)
4645 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
4646 || ! _bfd_stringtab_emit (abfd
, finfo
.symstrtab
))
4650 /* Adjust the relocs to have the correct symbol indices. */
4651 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4653 if ((o
->flags
& SEC_RELOC
) == 0)
4656 elf_link_adjust_relocs (abfd
, &elf_section_data (o
)->rel_hdr
,
4657 elf_section_data (o
)->rel_count
,
4658 elf_section_data (o
)->rel_hashes
);
4659 if (elf_section_data (o
)->rel_hdr2
!= NULL
)
4660 elf_link_adjust_relocs (abfd
, elf_section_data (o
)->rel_hdr2
,
4661 elf_section_data (o
)->rel_count2
,
4662 (elf_section_data (o
)->rel_hashes
4663 + elf_section_data (o
)->rel_count
));
4665 /* Set the reloc_count field to 0 to prevent write_relocs from
4666 trying to swap the relocs out itself. */
4670 /* If we are linking against a dynamic object, or generating a
4671 shared library, finish up the dynamic linking information. */
4674 Elf_External_Dyn
*dyncon
, *dynconend
;
4676 /* Fix up .dynamic entries. */
4677 o
= bfd_get_section_by_name (dynobj
, ".dynamic");
4678 BFD_ASSERT (o
!= NULL
);
4680 dyncon
= (Elf_External_Dyn
*) o
->contents
;
4681 dynconend
= (Elf_External_Dyn
*) (o
->contents
+ o
->_raw_size
);
4682 for (; dyncon
< dynconend
; dyncon
++)
4684 Elf_Internal_Dyn dyn
;
4688 elf_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4695 name
= info
->init_function
;
4698 name
= info
->fini_function
;
4701 struct elf_link_hash_entry
*h
;
4703 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
4704 false, false, true);
4706 && (h
->root
.type
== bfd_link_hash_defined
4707 || h
->root
.type
== bfd_link_hash_defweak
))
4709 dyn
.d_un
.d_val
= h
->root
.u
.def
.value
;
4710 o
= h
->root
.u
.def
.section
;
4711 if (o
->output_section
!= NULL
)
4712 dyn
.d_un
.d_val
+= (o
->output_section
->vma
4713 + o
->output_offset
);
4716 /* The symbol is imported from another shared
4717 library and does not apply to this one. */
4721 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
4736 name
= ".gnu.version_d";
4739 name
= ".gnu.version_r";
4742 name
= ".gnu.version";
4744 o
= bfd_get_section_by_name (abfd
, name
);
4745 BFD_ASSERT (o
!= NULL
);
4746 dyn
.d_un
.d_ptr
= o
->vma
;
4747 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
4754 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
4759 for (i
= 1; i
< elf_elfheader (abfd
)->e_shnum
; i
++)
4761 Elf_Internal_Shdr
*hdr
;
4763 hdr
= elf_elfsections (abfd
)[i
];
4764 if (hdr
->sh_type
== type
4765 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
4767 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
4768 dyn
.d_un
.d_val
+= hdr
->sh_size
;
4771 if (dyn
.d_un
.d_val
== 0
4772 || hdr
->sh_addr
< dyn
.d_un
.d_val
)
4773 dyn
.d_un
.d_val
= hdr
->sh_addr
;
4777 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
4783 /* If we have created any dynamic sections, then output them. */
4786 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
4789 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
4791 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4792 || o
->_raw_size
== 0)
4794 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
4796 /* At this point, we are only interested in sections
4797 created by elf_link_create_dynamic_sections. */
4800 if ((elf_section_data (o
->output_section
)->this_hdr
.sh_type
4802 || strcmp (bfd_get_section_name (abfd
, o
), ".dynstr") != 0)
4804 if (! bfd_set_section_contents (abfd
, o
->output_section
,
4805 o
->contents
, o
->output_offset
,
4813 /* The contents of the .dynstr section are actually in a
4815 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
4816 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
4817 || ! _bfd_stringtab_emit (abfd
,
4818 elf_hash_table (info
)->dynstr
))
4824 /* If we have optimized stabs strings, output them. */
4825 if (elf_hash_table (info
)->stab_info
!= NULL
)
4827 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
4831 if (finfo
.symstrtab
!= NULL
)
4832 _bfd_stringtab_free (finfo
.symstrtab
);
4833 if (finfo
.contents
!= NULL
)
4834 free (finfo
.contents
);
4835 if (finfo
.external_relocs
!= NULL
)
4836 free (finfo
.external_relocs
);
4837 if (finfo
.internal_relocs
!= NULL
)
4838 free (finfo
.internal_relocs
);
4839 if (finfo
.external_syms
!= NULL
)
4840 free (finfo
.external_syms
);
4841 if (finfo
.internal_syms
!= NULL
)
4842 free (finfo
.internal_syms
);
4843 if (finfo
.indices
!= NULL
)
4844 free (finfo
.indices
);
4845 if (finfo
.sections
!= NULL
)
4846 free (finfo
.sections
);
4847 if (finfo
.symbuf
!= NULL
)
4848 free (finfo
.symbuf
);
4849 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4851 if ((o
->flags
& SEC_RELOC
) != 0
4852 && elf_section_data (o
)->rel_hashes
!= NULL
)
4853 free (elf_section_data (o
)->rel_hashes
);
4856 elf_tdata (abfd
)->linker
= true;
4861 if (finfo
.symstrtab
!= NULL
)
4862 _bfd_stringtab_free (finfo
.symstrtab
);
4863 if (finfo
.contents
!= NULL
)
4864 free (finfo
.contents
);
4865 if (finfo
.external_relocs
!= NULL
)
4866 free (finfo
.external_relocs
);
4867 if (finfo
.internal_relocs
!= NULL
)
4868 free (finfo
.internal_relocs
);
4869 if (finfo
.external_syms
!= NULL
)
4870 free (finfo
.external_syms
);
4871 if (finfo
.internal_syms
!= NULL
)
4872 free (finfo
.internal_syms
);
4873 if (finfo
.indices
!= NULL
)
4874 free (finfo
.indices
);
4875 if (finfo
.sections
!= NULL
)
4876 free (finfo
.sections
);
4877 if (finfo
.symbuf
!= NULL
)
4878 free (finfo
.symbuf
);
4879 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4881 if ((o
->flags
& SEC_RELOC
) != 0
4882 && elf_section_data (o
)->rel_hashes
!= NULL
)
4883 free (elf_section_data (o
)->rel_hashes
);
4889 /* Add a symbol to the output symbol table. */
4892 elf_link_output_sym (finfo
, name
, elfsym
, input_sec
)
4893 struct elf_final_link_info
*finfo
;
4895 Elf_Internal_Sym
*elfsym
;
4896 asection
*input_sec
;
4898 boolean (*output_symbol_hook
) PARAMS ((bfd
*,
4899 struct bfd_link_info
*info
,
4904 output_symbol_hook
= get_elf_backend_data (finfo
->output_bfd
)->
4905 elf_backend_link_output_symbol_hook
;
4906 if (output_symbol_hook
!= NULL
)
4908 if (! ((*output_symbol_hook
)
4909 (finfo
->output_bfd
, finfo
->info
, name
, elfsym
, input_sec
)))
4913 if (name
== (const char *) NULL
|| *name
== '\0')
4914 elfsym
->st_name
= 0;
4915 else if (input_sec
->flags
& SEC_EXCLUDE
)
4916 elfsym
->st_name
= 0;
4919 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (finfo
->symstrtab
,
4922 if (elfsym
->st_name
== (unsigned long) -1)
4926 if (finfo
->symbuf_count
>= finfo
->symbuf_size
)
4928 if (! elf_link_flush_output_syms (finfo
))
4932 elf_swap_symbol_out (finfo
->output_bfd
, elfsym
,
4933 (PTR
) (finfo
->symbuf
+ finfo
->symbuf_count
));
4934 ++finfo
->symbuf_count
;
4936 ++ bfd_get_symcount (finfo
->output_bfd
);
4941 /* Flush the output symbols to the file. */
4944 elf_link_flush_output_syms (finfo
)
4945 struct elf_final_link_info
*finfo
;
4947 if (finfo
->symbuf_count
> 0)
4949 Elf_Internal_Shdr
*symtab
;
4951 symtab
= &elf_tdata (finfo
->output_bfd
)->symtab_hdr
;
4953 if (bfd_seek (finfo
->output_bfd
, symtab
->sh_offset
+ symtab
->sh_size
,
4955 || (bfd_write ((PTR
) finfo
->symbuf
, finfo
->symbuf_count
,
4956 sizeof (Elf_External_Sym
), finfo
->output_bfd
)
4957 != finfo
->symbuf_count
* sizeof (Elf_External_Sym
)))
4960 symtab
->sh_size
+= finfo
->symbuf_count
* sizeof (Elf_External_Sym
);
4962 finfo
->symbuf_count
= 0;
4968 /* Add an external symbol to the symbol table. This is called from
4969 the hash table traversal routine. When generating a shared object,
4970 we go through the symbol table twice. The first time we output
4971 anything that might have been forced to local scope in a version
4972 script. The second time we output the symbols that are still
4976 elf_link_output_extsym (h
, data
)
4977 struct elf_link_hash_entry
*h
;
4980 struct elf_outext_info
*eoinfo
= (struct elf_outext_info
*) data
;
4981 struct elf_final_link_info
*finfo
= eoinfo
->finfo
;
4983 Elf_Internal_Sym sym
;
4984 asection
*input_sec
;
4986 /* Decide whether to output this symbol in this pass. */
4987 if (eoinfo
->localsyms
)
4989 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
4994 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
4998 /* If we are not creating a shared library, and this symbol is
4999 referenced by a shared library but is not defined anywhere, then
5000 warn that it is undefined. If we do not do this, the runtime
5001 linker will complain that the symbol is undefined when the
5002 program is run. We don't have to worry about symbols that are
5003 referenced by regular files, because we will already have issued
5004 warnings for them. */
5005 if (! finfo
->info
->relocateable
5006 && ! (finfo
->info
->shared
5007 && !finfo
->info
->no_undefined
)
5008 && h
->root
.type
== bfd_link_hash_undefined
5009 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0
5010 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0)
5012 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
5013 (finfo
->info
, h
->root
.root
.string
, h
->root
.u
.undef
.abfd
,
5014 (asection
*) NULL
, 0, true)))
5016 eoinfo
->failed
= true;
5021 /* We don't want to output symbols that have never been mentioned by
5022 a regular file, or that we have been told to strip. However, if
5023 h->indx is set to -2, the symbol is used by a reloc and we must
5027 else if (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
5028 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0)
5029 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
5030 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0)
5032 else if (finfo
->info
->strip
== strip_all
5033 || (finfo
->info
->strip
== strip_some
5034 && bfd_hash_lookup (finfo
->info
->keep_hash
,
5035 h
->root
.root
.string
,
5036 false, false) == NULL
))
5041 /* If we're stripping it, and it's not a dynamic symbol, there's
5042 nothing else to do unless it is a forced local symbol. */
5045 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
5049 sym
.st_size
= h
->size
;
5050 sym
.st_other
= h
->other
;
5051 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
5052 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
5053 else if (h
->root
.type
== bfd_link_hash_undefweak
5054 || h
->root
.type
== bfd_link_hash_defweak
)
5055 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
5057 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
5059 switch (h
->root
.type
)
5062 case bfd_link_hash_new
:
5066 case bfd_link_hash_undefined
:
5067 input_sec
= bfd_und_section_ptr
;
5068 sym
.st_shndx
= SHN_UNDEF
;
5071 case bfd_link_hash_undefweak
:
5072 input_sec
= bfd_und_section_ptr
;
5073 sym
.st_shndx
= SHN_UNDEF
;
5076 case bfd_link_hash_defined
:
5077 case bfd_link_hash_defweak
:
5079 input_sec
= h
->root
.u
.def
.section
;
5080 if (input_sec
->output_section
!= NULL
)
5083 _bfd_elf_section_from_bfd_section (finfo
->output_bfd
,
5084 input_sec
->output_section
);
5085 if (sym
.st_shndx
== (unsigned short) -1)
5087 (*_bfd_error_handler
)
5088 (_("%s: could not find output section %s for input section %s"),
5089 bfd_get_filename (finfo
->output_bfd
),
5090 input_sec
->output_section
->name
,
5092 eoinfo
->failed
= true;
5096 /* ELF symbols in relocateable files are section relative,
5097 but in nonrelocateable files they are virtual
5099 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
5100 if (! finfo
->info
->relocateable
)
5101 sym
.st_value
+= input_sec
->output_section
->vma
;
5105 BFD_ASSERT (input_sec
->owner
== NULL
5106 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
5107 sym
.st_shndx
= SHN_UNDEF
;
5108 input_sec
= bfd_und_section_ptr
;
5113 case bfd_link_hash_common
:
5114 input_sec
= h
->root
.u
.c
.p
->section
;
5115 sym
.st_shndx
= SHN_COMMON
;
5116 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
5119 case bfd_link_hash_indirect
:
5120 /* These symbols are created by symbol versioning. They point
5121 to the decorated version of the name. For example, if the
5122 symbol foo@@GNU_1.2 is the default, which should be used when
5123 foo is used with no version, then we add an indirect symbol
5124 foo which points to foo@@GNU_1.2. We ignore these symbols,
5125 since the indirected symbol is already in the hash table. */
5128 case bfd_link_hash_warning
:
5129 /* We can't represent these symbols in ELF, although a warning
5130 symbol may have come from a .gnu.warning.SYMBOL section. We
5131 just put the target symbol in the hash table. If the target
5132 symbol does not really exist, don't do anything. */
5133 if (h
->root
.u
.i
.link
->type
== bfd_link_hash_new
)
5135 return (elf_link_output_extsym
5136 ((struct elf_link_hash_entry
*) h
->root
.u
.i
.link
, data
));
5139 /* Give the processor backend a chance to tweak the symbol value,
5140 and also to finish up anything that needs to be done for this
5142 if ((h
->dynindx
!= -1
5143 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
5144 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
5146 struct elf_backend_data
*bed
;
5148 bed
= get_elf_backend_data (finfo
->output_bfd
);
5149 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
5150 (finfo
->output_bfd
, finfo
->info
, h
, &sym
)))
5152 eoinfo
->failed
= true;
5157 /* If we are marking the symbol as undefined, and there are no
5158 non-weak references to this symbol from a regular object, then
5159 mark the symbol as weak undefined; if there are non-weak
5160 references, mark the symbol as strong. We can't do this earlier,
5161 because it might not be marked as undefined until the
5162 finish_dynamic_symbol routine gets through with it. */
5163 if (sym
.st_shndx
== SHN_UNDEF
5164 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
5165 && (ELF_ST_BIND(sym
.st_info
) == STB_GLOBAL
5166 || ELF_ST_BIND(sym
.st_info
) == STB_WEAK
))
5170 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
) != 0)
5171 bindtype
= STB_GLOBAL
;
5173 bindtype
= STB_WEAK
;
5174 sym
.st_info
= ELF_ST_INFO (bindtype
, ELF_ST_TYPE (sym
.st_info
));
5177 /* If a symbol is not defined locally, we clear the visibility
5179 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
5180 sym
.st_other
^= ELF_ST_VISIBILITY(sym
.st_other
);
5182 /* If this symbol should be put in the .dynsym section, then put it
5183 there now. We have already know the symbol index. We also fill
5184 in the entry in the .hash section. */
5185 if (h
->dynindx
!= -1
5186 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
5190 size_t hash_entry_size
;
5191 bfd_byte
*bucketpos
;
5194 sym
.st_name
= h
->dynstr_index
;
5196 elf_swap_symbol_out (finfo
->output_bfd
, &sym
,
5197 (PTR
) (((Elf_External_Sym
*)
5198 finfo
->dynsym_sec
->contents
)
5201 bucketcount
= elf_hash_table (finfo
->info
)->bucketcount
;
5202 bucket
= h
->elf_hash_value
% bucketcount
;
5204 = elf_section_data (finfo
->hash_sec
)->this_hdr
.sh_entsize
;
5205 bucketpos
= ((bfd_byte
*) finfo
->hash_sec
->contents
5206 + (bucket
+ 2) * hash_entry_size
);
5207 chain
= bfd_get (8 * hash_entry_size
, finfo
->output_bfd
, bucketpos
);
5208 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, h
->dynindx
, bucketpos
);
5209 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, chain
,
5210 ((bfd_byte
*) finfo
->hash_sec
->contents
5211 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
5213 if (finfo
->symver_sec
!= NULL
&& finfo
->symver_sec
->contents
!= NULL
)
5215 Elf_Internal_Versym iversym
;
5217 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
5219 if (h
->verinfo
.verdef
== NULL
)
5220 iversym
.vs_vers
= 0;
5222 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
5226 if (h
->verinfo
.vertree
== NULL
)
5227 iversym
.vs_vers
= 1;
5229 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
5232 if ((h
->elf_link_hash_flags
& ELF_LINK_HIDDEN
) != 0)
5233 iversym
.vs_vers
|= VERSYM_HIDDEN
;
5235 _bfd_elf_swap_versym_out (finfo
->output_bfd
, &iversym
,
5236 (((Elf_External_Versym
*)
5237 finfo
->symver_sec
->contents
)
5242 /* If we're stripping it, then it was just a dynamic symbol, and
5243 there's nothing else to do. */
5247 h
->indx
= bfd_get_symcount (finfo
->output_bfd
);
5249 if (! elf_link_output_sym (finfo
, h
->root
.root
.string
, &sym
, input_sec
))
5251 eoinfo
->failed
= true;
5258 /* Copy the relocations indicated by the INTERNAL_RELOCS (which
5259 originated from the section given by INPUT_REL_HDR) to the
5263 elf_link_output_relocs (output_bfd
, input_section
, input_rel_hdr
,
5266 asection
*input_section
;
5267 Elf_Internal_Shdr
*input_rel_hdr
;
5268 Elf_Internal_Rela
*internal_relocs
;
5270 Elf_Internal_Rela
*irela
;
5271 Elf_Internal_Rela
*irelaend
;
5272 Elf_Internal_Shdr
*output_rel_hdr
;
5273 asection
*output_section
;
5274 unsigned int *rel_countp
= NULL
;
5275 struct elf_backend_data
*bed
;
5277 output_section
= input_section
->output_section
;
5278 output_rel_hdr
= NULL
;
5280 if (elf_section_data (output_section
)->rel_hdr
.sh_entsize
5281 == input_rel_hdr
->sh_entsize
)
5283 output_rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
5284 rel_countp
= &elf_section_data (output_section
)->rel_count
;
5286 else if (elf_section_data (output_section
)->rel_hdr2
5287 && (elf_section_data (output_section
)->rel_hdr2
->sh_entsize
5288 == input_rel_hdr
->sh_entsize
))
5290 output_rel_hdr
= elf_section_data (output_section
)->rel_hdr2
;
5291 rel_countp
= &elf_section_data (output_section
)->rel_count2
;
5294 BFD_ASSERT (output_rel_hdr
!= NULL
);
5296 bed
= get_elf_backend_data (output_bfd
);
5297 irela
= internal_relocs
;
5298 irelaend
= irela
+ input_rel_hdr
->sh_size
/ input_rel_hdr
->sh_entsize
;
5299 if (input_rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
5301 Elf_External_Rel
*erel
;
5303 erel
= ((Elf_External_Rel
*) output_rel_hdr
->contents
+ *rel_countp
);
5304 for (; irela
< irelaend
; irela
++, erel
++)
5306 Elf_Internal_Rel irel
;
5308 irel
.r_offset
= irela
->r_offset
;
5309 irel
.r_info
= irela
->r_info
;
5310 BFD_ASSERT (irela
->r_addend
== 0);
5311 if (bed
->s
->swap_reloc_out
)
5312 (*bed
->s
->swap_reloc_out
) (output_bfd
, &irel
, (PTR
) erel
);
5314 elf_swap_reloc_out (output_bfd
, &irel
, erel
);
5319 Elf_External_Rela
*erela
;
5321 BFD_ASSERT (input_rel_hdr
->sh_entsize
5322 == sizeof (Elf_External_Rela
));
5323 erela
= ((Elf_External_Rela
*) output_rel_hdr
->contents
+ *rel_countp
);
5324 for (; irela
< irelaend
; irela
++, erela
++)
5325 if (bed
->s
->swap_reloca_out
)
5326 (*bed
->s
->swap_reloca_out
) (output_bfd
, irela
, (PTR
) erela
);
5328 elf_swap_reloca_out (output_bfd
, irela
, erela
);
5331 /* Bump the counter, so that we know where to add the next set of
5333 *rel_countp
+= input_rel_hdr
->sh_size
/ input_rel_hdr
->sh_entsize
;
5336 /* Link an input file into the linker output file. This function
5337 handles all the sections and relocations of the input file at once.
5338 This is so that we only have to read the local symbols once, and
5339 don't have to keep them in memory. */
5342 elf_link_input_bfd (finfo
, input_bfd
)
5343 struct elf_final_link_info
*finfo
;
5346 boolean (*relocate_section
) PARAMS ((bfd
*, struct bfd_link_info
*,
5347 bfd
*, asection
*, bfd_byte
*,
5348 Elf_Internal_Rela
*,
5349 Elf_Internal_Sym
*, asection
**));
5351 Elf_Internal_Shdr
*symtab_hdr
;
5354 Elf_External_Sym
*external_syms
;
5355 Elf_External_Sym
*esym
;
5356 Elf_External_Sym
*esymend
;
5357 Elf_Internal_Sym
*isym
;
5359 asection
**ppsection
;
5361 struct elf_backend_data
*bed
;
5363 output_bfd
= finfo
->output_bfd
;
5364 bed
= get_elf_backend_data (output_bfd
);
5365 relocate_section
= bed
->elf_backend_relocate_section
;
5367 /* If this is a dynamic object, we don't want to do anything here:
5368 we don't want the local symbols, and we don't want the section
5370 if ((input_bfd
->flags
& DYNAMIC
) != 0)
5373 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
5374 if (elf_bad_symtab (input_bfd
))
5376 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
5381 locsymcount
= symtab_hdr
->sh_info
;
5382 extsymoff
= symtab_hdr
->sh_info
;
5385 /* Read the local symbols. */
5386 if (symtab_hdr
->contents
!= NULL
)
5387 external_syms
= (Elf_External_Sym
*) symtab_hdr
->contents
;
5388 else if (locsymcount
== 0)
5389 external_syms
= NULL
;
5392 external_syms
= finfo
->external_syms
;
5393 if (bfd_seek (input_bfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
5394 || (bfd_read (external_syms
, sizeof (Elf_External_Sym
),
5395 locsymcount
, input_bfd
)
5396 != locsymcount
* sizeof (Elf_External_Sym
)))
5400 /* Swap in the local symbols and write out the ones which we know
5401 are going into the output file. */
5402 esym
= external_syms
;
5403 esymend
= esym
+ locsymcount
;
5404 isym
= finfo
->internal_syms
;
5405 pindex
= finfo
->indices
;
5406 ppsection
= finfo
->sections
;
5407 for (; esym
< esymend
; esym
++, isym
++, pindex
++, ppsection
++)
5411 Elf_Internal_Sym osym
;
5413 elf_swap_symbol_in (input_bfd
, esym
, isym
);
5416 if (elf_bad_symtab (input_bfd
))
5418 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
5425 if (isym
->st_shndx
== SHN_UNDEF
)
5426 isec
= bfd_und_section_ptr
;
5427 else if (isym
->st_shndx
> 0 && isym
->st_shndx
< SHN_LORESERVE
)
5428 isec
= section_from_elf_index (input_bfd
, isym
->st_shndx
);
5429 else if (isym
->st_shndx
== SHN_ABS
)
5430 isec
= bfd_abs_section_ptr
;
5431 else if (isym
->st_shndx
== SHN_COMMON
)
5432 isec
= bfd_com_section_ptr
;
5441 /* Don't output the first, undefined, symbol. */
5442 if (esym
== external_syms
)
5445 /* If we are stripping all symbols, we don't want to output this
5447 if (finfo
->info
->strip
== strip_all
)
5450 /* We never output section symbols. Instead, we use the section
5451 symbol of the corresponding section in the output file. */
5452 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
5455 /* If we are discarding all local symbols, we don't want to
5456 output this one. If we are generating a relocateable output
5457 file, then some of the local symbols may be required by
5458 relocs; we output them below as we discover that they are
5460 if (finfo
->info
->discard
== discard_all
)
5463 /* If this symbol is defined in a section which we are
5464 discarding, we don't need to keep it, but note that
5465 linker_mark is only reliable for sections that have contents.
5466 For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
5467 as well as linker_mark. */
5468 if (isym
->st_shndx
> 0
5469 && isym
->st_shndx
< SHN_LORESERVE
5471 && ((! isec
->linker_mark
&& (isec
->flags
& SEC_HAS_CONTENTS
) != 0)
5472 || (! finfo
->info
->relocateable
5473 && (isec
->flags
& SEC_EXCLUDE
) != 0)))
5476 /* Get the name of the symbol. */
5477 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
5482 /* See if we are discarding symbols with this name. */
5483 if ((finfo
->info
->strip
== strip_some
5484 && (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false, false)
5486 || (finfo
->info
->discard
== discard_l
5487 && bfd_is_local_label_name (input_bfd
, name
)))
5490 /* If we get here, we are going to output this symbol. */
5494 /* Adjust the section index for the output file. */
5495 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
5496 isec
->output_section
);
5497 if (osym
.st_shndx
== (unsigned short) -1)
5500 *pindex
= bfd_get_symcount (output_bfd
);
5502 /* ELF symbols in relocateable files are section relative, but
5503 in executable files they are virtual addresses. Note that
5504 this code assumes that all ELF sections have an associated
5505 BFD section with a reasonable value for output_offset; below
5506 we assume that they also have a reasonable value for
5507 output_section. Any special sections must be set up to meet
5508 these requirements. */
5509 osym
.st_value
+= isec
->output_offset
;
5510 if (! finfo
->info
->relocateable
)
5511 osym
.st_value
+= isec
->output_section
->vma
;
5513 if (! elf_link_output_sym (finfo
, name
, &osym
, isec
))
5517 /* Relocate the contents of each section. */
5518 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
5522 if (! o
->linker_mark
)
5524 /* This section was omitted from the link. */
5528 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
5529 || (o
->_raw_size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
5532 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
5534 /* Section was created by elf_link_create_dynamic_sections
5539 /* Get the contents of the section. They have been cached by a
5540 relaxation routine. Note that o is a section in an input
5541 file, so the contents field will not have been set by any of
5542 the routines which work on output files. */
5543 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
5544 contents
= elf_section_data (o
)->this_hdr
.contents
;
5547 contents
= finfo
->contents
;
5548 if (! bfd_get_section_contents (input_bfd
, o
, contents
,
5549 (file_ptr
) 0, o
->_raw_size
))
5553 if ((o
->flags
& SEC_RELOC
) != 0)
5555 Elf_Internal_Rela
*internal_relocs
;
5557 /* Get the swapped relocs. */
5558 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
5559 (input_bfd
, o
, finfo
->external_relocs
,
5560 finfo
->internal_relocs
, false));
5561 if (internal_relocs
== NULL
5562 && o
->reloc_count
> 0)
5565 /* Relocate the section by invoking a back end routine.
5567 The back end routine is responsible for adjusting the
5568 section contents as necessary, and (if using Rela relocs
5569 and generating a relocateable output file) adjusting the
5570 reloc addend as necessary.
5572 The back end routine does not have to worry about setting
5573 the reloc address or the reloc symbol index.
5575 The back end routine is given a pointer to the swapped in
5576 internal symbols, and can access the hash table entries
5577 for the external symbols via elf_sym_hashes (input_bfd).
5579 When generating relocateable output, the back end routine
5580 must handle STB_LOCAL/STT_SECTION symbols specially. The
5581 output symbol is going to be a section symbol
5582 corresponding to the output section, which will require
5583 the addend to be adjusted. */
5585 if (! (*relocate_section
) (output_bfd
, finfo
->info
,
5586 input_bfd
, o
, contents
,
5588 finfo
->internal_syms
,
5592 if (finfo
->info
->relocateable
|| finfo
->info
->emitrelocations
)
5594 Elf_Internal_Rela
*irela
;
5595 Elf_Internal_Rela
*irelaend
;
5596 struct elf_link_hash_entry
**rel_hash
;
5597 Elf_Internal_Shdr
*input_rel_hdr
;
5599 /* Adjust the reloc addresses and symbol indices. */
5601 irela
= internal_relocs
;
5603 irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
5604 rel_hash
= (elf_section_data (o
->output_section
)->rel_hashes
5605 + elf_section_data (o
->output_section
)->rel_count
5606 + elf_section_data (o
->output_section
)->rel_count2
);
5607 for (; irela
< irelaend
; irela
++, rel_hash
++)
5609 unsigned long r_symndx
;
5610 Elf_Internal_Sym
*isym
;
5613 irela
->r_offset
+= o
->output_offset
;
5615 /* Relocs in an executable have to be virtual addresses. */
5616 if (finfo
->info
->emitrelocations
)
5617 irela
->r_offset
+= o
->output_section
->vma
;
5619 r_symndx
= ELF_R_SYM (irela
->r_info
);
5624 if (r_symndx
>= locsymcount
5625 || (elf_bad_symtab (input_bfd
)
5626 && finfo
->sections
[r_symndx
] == NULL
))
5628 struct elf_link_hash_entry
*rh
;
5631 /* This is a reloc against a global symbol. We
5632 have not yet output all the local symbols, so
5633 we do not know the symbol index of any global
5634 symbol. We set the rel_hash entry for this
5635 reloc to point to the global hash table entry
5636 for this symbol. The symbol index is then
5637 set at the end of elf_bfd_final_link. */
5638 indx
= r_symndx
- extsymoff
;
5639 rh
= elf_sym_hashes (input_bfd
)[indx
];
5640 while (rh
->root
.type
== bfd_link_hash_indirect
5641 || rh
->root
.type
== bfd_link_hash_warning
)
5642 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
5644 /* Setting the index to -2 tells
5645 elf_link_output_extsym that this symbol is
5647 BFD_ASSERT (rh
->indx
< 0);
5655 /* This is a reloc against a local symbol. */
5658 isym
= finfo
->internal_syms
+ r_symndx
;
5659 sec
= finfo
->sections
[r_symndx
];
5660 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
5662 /* I suppose the backend ought to fill in the
5663 section of any STT_SECTION symbol against a
5664 processor specific section. If we have
5665 discarded a section, the output_section will
5666 be the absolute section. */
5668 && (bfd_is_abs_section (sec
)
5669 || (sec
->output_section
!= NULL
5670 && bfd_is_abs_section (sec
->output_section
))))
5672 else if (sec
== NULL
|| sec
->owner
== NULL
)
5674 bfd_set_error (bfd_error_bad_value
);
5679 r_symndx
= sec
->output_section
->target_index
;
5680 BFD_ASSERT (r_symndx
!= 0);
5685 if (finfo
->indices
[r_symndx
] == -1)
5691 if (finfo
->info
->strip
== strip_all
)
5693 /* You can't do ld -r -s. */
5694 bfd_set_error (bfd_error_invalid_operation
);
5698 /* This symbol was skipped earlier, but
5699 since it is needed by a reloc, we
5700 must output it now. */
5701 link
= symtab_hdr
->sh_link
;
5702 name
= bfd_elf_string_from_elf_section (input_bfd
,
5708 osec
= sec
->output_section
;
5710 _bfd_elf_section_from_bfd_section (output_bfd
,
5712 if (isym
->st_shndx
== (unsigned short) -1)
5715 isym
->st_value
+= sec
->output_offset
;
5716 if (! finfo
->info
->relocateable
)
5717 isym
->st_value
+= osec
->vma
;
5719 finfo
->indices
[r_symndx
] = bfd_get_symcount (output_bfd
);
5721 if (! elf_link_output_sym (finfo
, name
, isym
, sec
))
5725 r_symndx
= finfo
->indices
[r_symndx
];
5728 irela
->r_info
= ELF_R_INFO (r_symndx
,
5729 ELF_R_TYPE (irela
->r_info
));
5732 /* Swap out the relocs. */
5733 input_rel_hdr
= &elf_section_data (o
)->rel_hdr
;
5734 elf_link_output_relocs (output_bfd
, o
,
5738 += input_rel_hdr
->sh_size
/ input_rel_hdr
->sh_entsize
;
5739 input_rel_hdr
= elf_section_data (o
)->rel_hdr2
;
5741 elf_link_output_relocs (output_bfd
, o
,
5747 /* Write out the modified section contents. */
5748 if (elf_section_data (o
)->stab_info
== NULL
)
5750 if (! (o
->flags
& SEC_EXCLUDE
) &&
5751 ! bfd_set_section_contents (output_bfd
, o
->output_section
,
5752 contents
, o
->output_offset
,
5753 (o
->_cooked_size
!= 0
5760 if (! (_bfd_write_section_stabs
5761 (output_bfd
, &elf_hash_table (finfo
->info
)->stab_info
,
5762 o
, &elf_section_data (o
)->stab_info
, contents
)))
5770 /* Generate a reloc when linking an ELF file. This is a reloc
5771 requested by the linker, and does come from any input file. This
5772 is used to build constructor and destructor tables when linking
5776 elf_reloc_link_order (output_bfd
, info
, output_section
, link_order
)
5778 struct bfd_link_info
*info
;
5779 asection
*output_section
;
5780 struct bfd_link_order
*link_order
;
5782 reloc_howto_type
*howto
;
5786 struct elf_link_hash_entry
**rel_hash_ptr
;
5787 Elf_Internal_Shdr
*rel_hdr
;
5788 struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
5790 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
5793 bfd_set_error (bfd_error_bad_value
);
5797 addend
= link_order
->u
.reloc
.p
->addend
;
5799 /* Figure out the symbol index. */
5800 rel_hash_ptr
= (elf_section_data (output_section
)->rel_hashes
5801 + elf_section_data (output_section
)->rel_count
5802 + elf_section_data (output_section
)->rel_count2
);
5803 if (link_order
->type
== bfd_section_reloc_link_order
)
5805 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
5806 BFD_ASSERT (indx
!= 0);
5807 *rel_hash_ptr
= NULL
;
5811 struct elf_link_hash_entry
*h
;
5813 /* Treat a reloc against a defined symbol as though it were
5814 actually against the section. */
5815 h
= ((struct elf_link_hash_entry
*)
5816 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
5817 link_order
->u
.reloc
.p
->u
.name
,
5818 false, false, true));
5820 && (h
->root
.type
== bfd_link_hash_defined
5821 || h
->root
.type
== bfd_link_hash_defweak
))
5825 section
= h
->root
.u
.def
.section
;
5826 indx
= section
->output_section
->target_index
;
5827 *rel_hash_ptr
= NULL
;
5828 /* It seems that we ought to add the symbol value to the
5829 addend here, but in practice it has already been added
5830 because it was passed to constructor_callback. */
5831 addend
+= section
->output_section
->vma
+ section
->output_offset
;
5835 /* Setting the index to -2 tells elf_link_output_extsym that
5836 this symbol is used by a reloc. */
5843 if (! ((*info
->callbacks
->unattached_reloc
)
5844 (info
, link_order
->u
.reloc
.p
->u
.name
, (bfd
*) NULL
,
5845 (asection
*) NULL
, (bfd_vma
) 0)))
5851 /* If this is an inplace reloc, we must write the addend into the
5853 if (howto
->partial_inplace
&& addend
!= 0)
5856 bfd_reloc_status_type rstat
;
5860 size
= bfd_get_reloc_size (howto
);
5861 buf
= (bfd_byte
*) bfd_zmalloc (size
);
5862 if (buf
== (bfd_byte
*) NULL
)
5864 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
5870 case bfd_reloc_outofrange
:
5872 case bfd_reloc_overflow
:
5873 if (! ((*info
->callbacks
->reloc_overflow
)
5875 (link_order
->type
== bfd_section_reloc_link_order
5876 ? bfd_section_name (output_bfd
,
5877 link_order
->u
.reloc
.p
->u
.section
)
5878 : link_order
->u
.reloc
.p
->u
.name
),
5879 howto
->name
, addend
, (bfd
*) NULL
, (asection
*) NULL
,
5887 ok
= bfd_set_section_contents (output_bfd
, output_section
, (PTR
) buf
,
5888 (file_ptr
) link_order
->offset
, size
);
5894 /* The address of a reloc is relative to the section in a
5895 relocateable file, and is a virtual address in an executable
5897 offset
= link_order
->offset
;
5898 if (! info
->relocateable
)
5899 offset
+= output_section
->vma
;
5901 rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
5903 if (rel_hdr
->sh_type
== SHT_REL
)
5905 Elf_Internal_Rel irel
;
5906 Elf_External_Rel
*erel
;
5908 irel
.r_offset
= offset
;
5909 irel
.r_info
= ELF_R_INFO (indx
, howto
->type
);
5910 erel
= ((Elf_External_Rel
*) rel_hdr
->contents
5911 + elf_section_data (output_section
)->rel_count
);
5912 if (bed
->s
->swap_reloc_out
)
5913 (*bed
->s
->swap_reloc_out
) (output_bfd
, &irel
, (bfd_byte
*) erel
);
5915 elf_swap_reloc_out (output_bfd
, &irel
, erel
);
5919 Elf_Internal_Rela irela
;
5920 Elf_External_Rela
*erela
;
5922 irela
.r_offset
= offset
;
5923 irela
.r_info
= ELF_R_INFO (indx
, howto
->type
);
5924 irela
.r_addend
= addend
;
5925 erela
= ((Elf_External_Rela
*) rel_hdr
->contents
5926 + elf_section_data (output_section
)->rel_count
);
5927 if (bed
->s
->swap_reloca_out
)
5928 (*bed
->s
->swap_reloca_out
) (output_bfd
, &irela
, (bfd_byte
*) erela
);
5930 elf_swap_reloca_out (output_bfd
, &irela
, erela
);
5933 ++elf_section_data (output_section
)->rel_count
;
5939 /* Allocate a pointer to live in a linker created section. */
5942 elf_create_pointer_linker_section (abfd
, info
, lsect
, h
, rel
)
5944 struct bfd_link_info
*info
;
5945 elf_linker_section_t
*lsect
;
5946 struct elf_link_hash_entry
*h
;
5947 const Elf_Internal_Rela
*rel
;
5949 elf_linker_section_pointers_t
**ptr_linker_section_ptr
= NULL
;
5950 elf_linker_section_pointers_t
*linker_section_ptr
;
5951 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);;
5953 BFD_ASSERT (lsect
!= NULL
);
5955 /* Is this a global symbol? */
5958 /* Has this symbol already been allocated, if so, our work is done */
5959 if (_bfd_elf_find_pointer_linker_section (h
->linker_section_pointer
,
5964 ptr_linker_section_ptr
= &h
->linker_section_pointer
;
5965 /* Make sure this symbol is output as a dynamic symbol. */
5966 if (h
->dynindx
== -1)
5968 if (! elf_link_record_dynamic_symbol (info
, h
))
5972 if (lsect
->rel_section
)
5973 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
5976 else /* Allocation of a pointer to a local symbol */
5978 elf_linker_section_pointers_t
**ptr
= elf_local_ptr_offsets (abfd
);
5980 /* Allocate a table to hold the local symbols if first time */
5983 unsigned int num_symbols
= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
5984 register unsigned int i
;
5986 ptr
= (elf_linker_section_pointers_t
**)
5987 bfd_alloc (abfd
, num_symbols
* sizeof (elf_linker_section_pointers_t
*));
5992 elf_local_ptr_offsets (abfd
) = ptr
;
5993 for (i
= 0; i
< num_symbols
; i
++)
5994 ptr
[i
] = (elf_linker_section_pointers_t
*)0;
5997 /* Has this symbol already been allocated, if so, our work is done */
5998 if (_bfd_elf_find_pointer_linker_section (ptr
[r_symndx
],
6003 ptr_linker_section_ptr
= &ptr
[r_symndx
];
6007 /* If we are generating a shared object, we need to
6008 output a R_<xxx>_RELATIVE reloc so that the
6009 dynamic linker can adjust this GOT entry. */
6010 BFD_ASSERT (lsect
->rel_section
!= NULL
);
6011 lsect
->rel_section
->_raw_size
+= sizeof (Elf_External_Rela
);
6015 /* Allocate space for a pointer in the linker section, and allocate a new pointer record
6016 from internal memory. */
6017 BFD_ASSERT (ptr_linker_section_ptr
!= NULL
);
6018 linker_section_ptr
= (elf_linker_section_pointers_t
*)
6019 bfd_alloc (abfd
, sizeof (elf_linker_section_pointers_t
));
6021 if (!linker_section_ptr
)
6024 linker_section_ptr
->next
= *ptr_linker_section_ptr
;
6025 linker_section_ptr
->addend
= rel
->r_addend
;
6026 linker_section_ptr
->which
= lsect
->which
;
6027 linker_section_ptr
->written_address_p
= false;
6028 *ptr_linker_section_ptr
= linker_section_ptr
;
6031 if (lsect
->hole_size
&& lsect
->hole_offset
< lsect
->max_hole_offset
)
6033 linker_section_ptr
->offset
= lsect
->section
->_raw_size
- lsect
->hole_size
+ (ARCH_SIZE
/ 8);
6034 lsect
->hole_offset
+= ARCH_SIZE
/ 8;
6035 lsect
->sym_offset
+= ARCH_SIZE
/ 8;
6036 if (lsect
->sym_hash
) /* Bump up symbol value if needed */
6038 lsect
->sym_hash
->root
.u
.def
.value
+= ARCH_SIZE
/ 8;
6040 fprintf (stderr
, "Bump up %s by %ld, current value = %ld\n",
6041 lsect
->sym_hash
->root
.root
.string
,
6042 (long)ARCH_SIZE
/ 8,
6043 (long)lsect
->sym_hash
->root
.u
.def
.value
);
6049 linker_section_ptr
->offset
= lsect
->section
->_raw_size
;
6051 lsect
->section
->_raw_size
+= ARCH_SIZE
/ 8;
6054 fprintf (stderr
, "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
6055 lsect
->name
, (long)linker_section_ptr
->offset
, (long)lsect
->section
->_raw_size
);
6063 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR)
6066 #define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR)
6069 /* Fill in the address for a pointer generated in alinker section. */
6072 elf_finish_pointer_linker_section (output_bfd
, input_bfd
, info
, lsect
, h
, relocation
, rel
, relative_reloc
)
6075 struct bfd_link_info
*info
;
6076 elf_linker_section_t
*lsect
;
6077 struct elf_link_hash_entry
*h
;
6079 const Elf_Internal_Rela
*rel
;
6082 elf_linker_section_pointers_t
*linker_section_ptr
;
6084 BFD_ASSERT (lsect
!= NULL
);
6086 if (h
!= NULL
) /* global symbol */
6088 linker_section_ptr
= _bfd_elf_find_pointer_linker_section (h
->linker_section_pointer
,
6092 BFD_ASSERT (linker_section_ptr
!= NULL
);
6094 if (! elf_hash_table (info
)->dynamic_sections_created
6097 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)))
6099 /* This is actually a static link, or it is a
6100 -Bsymbolic link and the symbol is defined
6101 locally. We must initialize this entry in the
6104 When doing a dynamic link, we create a .rela.<xxx>
6105 relocation entry to initialize the value. This
6106 is done in the finish_dynamic_symbol routine. */
6107 if (!linker_section_ptr
->written_address_p
)
6109 linker_section_ptr
->written_address_p
= true;
6110 bfd_put_ptr (output_bfd
, relocation
+ linker_section_ptr
->addend
,
6111 lsect
->section
->contents
+ linker_section_ptr
->offset
);
6115 else /* local symbol */
6117 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
6118 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
) != NULL
);
6119 BFD_ASSERT (elf_local_ptr_offsets (input_bfd
)[r_symndx
] != NULL
);
6120 linker_section_ptr
= _bfd_elf_find_pointer_linker_section (elf_local_ptr_offsets (input_bfd
)[r_symndx
],
6124 BFD_ASSERT (linker_section_ptr
!= NULL
);
6126 /* Write out pointer if it hasn't been rewritten out before */
6127 if (!linker_section_ptr
->written_address_p
)
6129 linker_section_ptr
->written_address_p
= true;
6130 bfd_put_ptr (output_bfd
, relocation
+ linker_section_ptr
->addend
,
6131 lsect
->section
->contents
+ linker_section_ptr
->offset
);
6135 asection
*srel
= lsect
->rel_section
;
6136 Elf_Internal_Rela outrel
;
6138 /* We need to generate a relative reloc for the dynamic linker. */
6140 lsect
->rel_section
= srel
= bfd_get_section_by_name (elf_hash_table (info
)->dynobj
,
6143 BFD_ASSERT (srel
!= NULL
);
6145 outrel
.r_offset
= (lsect
->section
->output_section
->vma
6146 + lsect
->section
->output_offset
6147 + linker_section_ptr
->offset
);
6148 outrel
.r_info
= ELF_R_INFO (0, relative_reloc
);
6149 outrel
.r_addend
= 0;
6150 elf_swap_reloca_out (output_bfd
, &outrel
,
6151 (((Elf_External_Rela
*)
6152 lsect
->section
->contents
)
6153 + elf_section_data (lsect
->section
)->rel_count
));
6154 ++elf_section_data (lsect
->section
)->rel_count
;
6159 relocation
= (lsect
->section
->output_offset
6160 + linker_section_ptr
->offset
6161 - lsect
->hole_offset
6162 - lsect
->sym_offset
);
6165 fprintf (stderr
, "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6166 lsect
->name
, (long)relocation
, (long)relocation
);
6169 /* Subtract out the addend, because it will get added back in by the normal
6171 return relocation
- linker_section_ptr
->addend
;
6174 /* Garbage collect unused sections. */
6176 static boolean elf_gc_mark
6177 PARAMS ((struct bfd_link_info
*info
, asection
*sec
,
6178 asection
* (*gc_mark_hook
)
6179 PARAMS ((bfd
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
6180 struct elf_link_hash_entry
*, Elf_Internal_Sym
*))));
6182 static boolean elf_gc_sweep
6183 PARAMS ((struct bfd_link_info
*info
,
6184 boolean (*gc_sweep_hook
)
6185 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
6186 const Elf_Internal_Rela
*relocs
))));
6188 static boolean elf_gc_sweep_symbol
6189 PARAMS ((struct elf_link_hash_entry
*h
, PTR idxptr
));
6191 static boolean elf_gc_allocate_got_offsets
6192 PARAMS ((struct elf_link_hash_entry
*h
, PTR offarg
));
6194 static boolean elf_gc_propagate_vtable_entries_used
6195 PARAMS ((struct elf_link_hash_entry
*h
, PTR dummy
));
6197 static boolean elf_gc_smash_unused_vtentry_relocs
6198 PARAMS ((struct elf_link_hash_entry
*h
, PTR dummy
));
6200 /* The mark phase of garbage collection. For a given section, mark
6201 it, and all the sections which define symbols to which it refers. */
6204 elf_gc_mark (info
, sec
, gc_mark_hook
)
6205 struct bfd_link_info
*info
;
6207 asection
* (*gc_mark_hook
)
6208 PARAMS ((bfd
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
6209 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
6215 /* Look through the section relocs. */
6217 if ((sec
->flags
& SEC_RELOC
) != 0 && sec
->reloc_count
> 0)
6219 Elf_Internal_Rela
*relstart
, *rel
, *relend
;
6220 Elf_Internal_Shdr
*symtab_hdr
;
6221 struct elf_link_hash_entry
**sym_hashes
;
6224 Elf_External_Sym
*locsyms
, *freesyms
= NULL
;
6225 bfd
*input_bfd
= sec
->owner
;
6226 struct elf_backend_data
*bed
= get_elf_backend_data (input_bfd
);
6228 /* GCFIXME: how to arrange so that relocs and symbols are not
6229 reread continually? */
6231 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
6232 sym_hashes
= elf_sym_hashes (input_bfd
);
6234 /* Read the local symbols. */
6235 if (elf_bad_symtab (input_bfd
))
6237 nlocsyms
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6241 extsymoff
= nlocsyms
= symtab_hdr
->sh_info
;
6242 if (symtab_hdr
->contents
)
6243 locsyms
= (Elf_External_Sym
*) symtab_hdr
->contents
;
6244 else if (nlocsyms
== 0)
6248 locsyms
= freesyms
=
6249 bfd_malloc (nlocsyms
* sizeof (Elf_External_Sym
));
6250 if (freesyms
== NULL
6251 || bfd_seek (input_bfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
6252 || (bfd_read (locsyms
, sizeof (Elf_External_Sym
),
6253 nlocsyms
, input_bfd
)
6254 != nlocsyms
* sizeof (Elf_External_Sym
)))
6261 /* Read the relocations. */
6262 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
6263 (sec
->owner
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
6264 info
->keep_memory
));
6265 if (relstart
== NULL
)
6270 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
6272 for (rel
= relstart
; rel
< relend
; rel
++)
6274 unsigned long r_symndx
;
6276 struct elf_link_hash_entry
*h
;
6279 r_symndx
= ELF_R_SYM (rel
->r_info
);
6283 if (elf_bad_symtab (sec
->owner
))
6285 elf_swap_symbol_in (input_bfd
, &locsyms
[r_symndx
], &s
);
6286 if (ELF_ST_BIND (s
.st_info
) == STB_LOCAL
)
6287 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, NULL
, &s
);
6290 h
= sym_hashes
[r_symndx
- extsymoff
];
6291 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, h
, NULL
);
6294 else if (r_symndx
>= nlocsyms
)
6296 h
= sym_hashes
[r_symndx
- extsymoff
];
6297 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, h
, NULL
);
6301 elf_swap_symbol_in (input_bfd
, &locsyms
[r_symndx
], &s
);
6302 rsec
= (*gc_mark_hook
)(sec
->owner
, info
, rel
, NULL
, &s
);
6305 if (rsec
&& !rsec
->gc_mark
)
6306 if (!elf_gc_mark (info
, rsec
, gc_mark_hook
))
6314 if (!info
->keep_memory
)
6324 /* The sweep phase of garbage collection. Remove all garbage sections. */
6327 elf_gc_sweep (info
, gc_sweep_hook
)
6328 struct bfd_link_info
*info
;
6329 boolean (*gc_sweep_hook
)
6330 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
6331 const Elf_Internal_Rela
*relocs
));
6335 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
6339 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
6342 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
6344 /* Keep special sections. Keep .debug sections. */
6345 if ((o
->flags
& SEC_LINKER_CREATED
)
6346 || (o
->flags
& SEC_DEBUGGING
))
6352 /* Skip sweeping sections already excluded. */
6353 if (o
->flags
& SEC_EXCLUDE
)
6356 /* Since this is early in the link process, it is simple
6357 to remove a section from the output. */
6358 o
->flags
|= SEC_EXCLUDE
;
6360 /* But we also have to update some of the relocation
6361 info we collected before. */
6363 && (o
->flags
& SEC_RELOC
) && o
->reloc_count
> 0)
6365 Elf_Internal_Rela
*internal_relocs
;
6368 internal_relocs
= (NAME(_bfd_elf
,link_read_relocs
)
6369 (o
->owner
, o
, NULL
, NULL
, info
->keep_memory
));
6370 if (internal_relocs
== NULL
)
6373 r
= (*gc_sweep_hook
)(o
->owner
, info
, o
, internal_relocs
);
6375 if (!info
->keep_memory
)
6376 free (internal_relocs
);
6384 /* Remove the symbols that were in the swept sections from the dynamic
6385 symbol table. GCFIXME: Anyone know how to get them out of the
6386 static symbol table as well? */
6390 elf_link_hash_traverse (elf_hash_table (info
),
6391 elf_gc_sweep_symbol
,
6394 elf_hash_table (info
)->dynsymcount
= i
;
6400 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
6403 elf_gc_sweep_symbol (h
, idxptr
)
6404 struct elf_link_hash_entry
*h
;
6407 int *idx
= (int *) idxptr
;
6409 if (h
->dynindx
!= -1
6410 && ((h
->root
.type
!= bfd_link_hash_defined
6411 && h
->root
.type
!= bfd_link_hash_defweak
)
6412 || h
->root
.u
.def
.section
->gc_mark
))
6413 h
->dynindx
= (*idx
)++;
6418 /* Propogate collected vtable information. This is called through
6419 elf_link_hash_traverse. */
6422 elf_gc_propagate_vtable_entries_used (h
, okp
)
6423 struct elf_link_hash_entry
*h
;
6426 /* Those that are not vtables. */
6427 if (h
->vtable_parent
== NULL
)
6430 /* Those vtables that do not have parents, we cannot merge. */
6431 if (h
->vtable_parent
== (struct elf_link_hash_entry
*) -1)
6434 /* If we've already been done, exit. */
6435 if (h
->vtable_entries_used
&& h
->vtable_entries_used
[-1])
6438 /* Make sure the parent's table is up to date. */
6439 elf_gc_propagate_vtable_entries_used (h
->vtable_parent
, okp
);
6441 if (h
->vtable_entries_used
== NULL
)
6443 /* None of this table's entries were referenced. Re-use the
6445 h
->vtable_entries_used
= h
->vtable_parent
->vtable_entries_used
;
6446 h
->vtable_entries_size
= h
->vtable_parent
->vtable_entries_size
;
6453 /* Or the parent's entries into ours. */
6454 cu
= h
->vtable_entries_used
;
6456 pu
= h
->vtable_parent
->vtable_entries_used
;
6459 n
= h
->vtable_parent
->vtable_entries_size
/ FILE_ALIGN
;
6462 if (*pu
) *cu
= true;
6472 elf_gc_smash_unused_vtentry_relocs (h
, okp
)
6473 struct elf_link_hash_entry
*h
;
6477 bfd_vma hstart
, hend
;
6478 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
6479 struct elf_backend_data
*bed
;
6481 /* Take care of both those symbols that do not describe vtables as
6482 well as those that are not loaded. */
6483 if (h
->vtable_parent
== NULL
)
6486 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
6487 || h
->root
.type
== bfd_link_hash_defweak
);
6489 sec
= h
->root
.u
.def
.section
;
6490 hstart
= h
->root
.u
.def
.value
;
6491 hend
= hstart
+ h
->size
;
6493 relstart
= (NAME(_bfd_elf
,link_read_relocs
)
6494 (sec
->owner
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
, true));
6496 return *(boolean
*)okp
= false;
6497 bed
= get_elf_backend_data (sec
->owner
);
6498 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
6500 for (rel
= relstart
; rel
< relend
; ++rel
)
6501 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
6503 /* If the entry is in use, do nothing. */
6504 if (h
->vtable_entries_used
6505 && (rel
->r_offset
- hstart
) < h
->vtable_entries_size
)
6507 bfd_vma entry
= (rel
->r_offset
- hstart
) / FILE_ALIGN
;
6508 if (h
->vtable_entries_used
[entry
])
6511 /* Otherwise, kill it. */
6512 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
6518 /* Do mark and sweep of unused sections. */
6521 elf_gc_sections (abfd
, info
)
6523 struct bfd_link_info
*info
;
6527 asection
* (*gc_mark_hook
)
6528 PARAMS ((bfd
*abfd
, struct bfd_link_info
*, Elf_Internal_Rela
*,
6529 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*));
6531 if (!get_elf_backend_data (abfd
)->can_gc_sections
6532 || info
->relocateable
|| info
->emitrelocations
6533 || elf_hash_table (info
)->dynamic_sections_created
)
6536 /* Apply transitive closure to the vtable entry usage info. */
6537 elf_link_hash_traverse (elf_hash_table (info
),
6538 elf_gc_propagate_vtable_entries_used
,
6543 /* Kill the vtable relocations that were not used. */
6544 elf_link_hash_traverse (elf_hash_table (info
),
6545 elf_gc_smash_unused_vtentry_relocs
,
6550 /* Grovel through relocs to find out who stays ... */
6552 gc_mark_hook
= get_elf_backend_data (abfd
)->gc_mark_hook
;
6553 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
6557 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
6560 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
6562 if (o
->flags
& SEC_KEEP
)
6563 if (!elf_gc_mark (info
, o
, gc_mark_hook
))
6568 /* ... and mark SEC_EXCLUDE for those that go. */
6569 if (!elf_gc_sweep(info
, get_elf_backend_data (abfd
)->gc_sweep_hook
))
6575 /* Called from check_relocs to record the existance of a VTINHERIT reloc. */
6578 elf_gc_record_vtinherit (abfd
, sec
, h
, offset
)
6581 struct elf_link_hash_entry
*h
;
6584 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
6585 struct elf_link_hash_entry
**search
, *child
;
6586 bfd_size_type extsymcount
;
6588 /* The sh_info field of the symtab header tells us where the
6589 external symbols start. We don't care about the local symbols at
6591 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/sizeof (Elf_External_Sym
);
6592 if (!elf_bad_symtab (abfd
))
6593 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
6595 sym_hashes
= elf_sym_hashes (abfd
);
6596 sym_hashes_end
= sym_hashes
+ extsymcount
;
6598 /* Hunt down the child symbol, which is in this section at the same
6599 offset as the relocation. */
6600 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
6602 if ((child
= *search
) != NULL
6603 && (child
->root
.type
== bfd_link_hash_defined
6604 || child
->root
.type
== bfd_link_hash_defweak
)
6605 && child
->root
.u
.def
.section
== sec
6606 && child
->root
.u
.def
.value
== offset
)
6610 (*_bfd_error_handler
) ("%s: %s+%lu: No symbol found for INHERIT",
6611 bfd_get_filename (abfd
), sec
->name
,
6612 (unsigned long)offset
);
6613 bfd_set_error (bfd_error_invalid_operation
);
6619 /* This *should* only be the absolute section. It could potentially
6620 be that someone has defined a non-global vtable though, which
6621 would be bad. It isn't worth paging in the local symbols to be
6622 sure though; that case should simply be handled by the assembler. */
6624 child
->vtable_parent
= (struct elf_link_hash_entry
*) -1;
6627 child
->vtable_parent
= h
;
6632 /* Called from check_relocs to record the existance of a VTENTRY reloc. */
6635 elf_gc_record_vtentry (abfd
, sec
, h
, addend
)
6636 bfd
*abfd ATTRIBUTE_UNUSED
;
6637 asection
*sec ATTRIBUTE_UNUSED
;
6638 struct elf_link_hash_entry
*h
;
6641 if (addend
>= h
->vtable_entries_size
)
6644 boolean
*ptr
= h
->vtable_entries_used
;
6646 /* While the symbol is undefined, we have to be prepared to handle
6648 if (h
->root
.type
== bfd_link_hash_undefined
)
6655 /* Oops! We've got a reference past the defined end of
6656 the table. This is probably a bug -- shall we warn? */
6661 /* Allocate one extra entry for use as a "done" flag for the
6662 consolidation pass. */
6663 bytes
= (size
/ FILE_ALIGN
+ 1) * sizeof (boolean
);
6667 ptr
= bfd_realloc (ptr
- 1, bytes
);
6673 oldbytes
= (h
->vtable_entries_size
/FILE_ALIGN
+ 1) * sizeof (boolean
);
6674 memset (((char *)ptr
) + oldbytes
, 0, bytes
- oldbytes
);
6678 ptr
= bfd_zmalloc (bytes
);
6683 /* And arrange for that done flag to be at index -1. */
6684 h
->vtable_entries_used
= ptr
+ 1;
6685 h
->vtable_entries_size
= size
;
6688 h
->vtable_entries_used
[addend
/ FILE_ALIGN
] = true;
6693 /* And an accompanying bit to work out final got entry offsets once
6694 we're done. Should be called from final_link. */
6697 elf_gc_common_finalize_got_offsets (abfd
, info
)
6699 struct bfd_link_info
*info
;
6702 struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6705 /* The GOT offset is relative to the .got section, but the GOT header is
6706 put into the .got.plt section, if the backend uses it. */
6707 if (bed
->want_got_plt
)
6710 gotoff
= bed
->got_header_size
;
6712 /* Do the local .got entries first. */
6713 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
6715 bfd_signed_vma
*local_got
;
6716 bfd_size_type j
, locsymcount
;
6717 Elf_Internal_Shdr
*symtab_hdr
;
6719 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
6722 local_got
= elf_local_got_refcounts (i
);
6726 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
6727 if (elf_bad_symtab (i
))
6728 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6730 locsymcount
= symtab_hdr
->sh_info
;
6732 for (j
= 0; j
< locsymcount
; ++j
)
6734 if (local_got
[j
] > 0)
6736 local_got
[j
] = gotoff
;
6737 gotoff
+= ARCH_SIZE
/ 8;
6740 local_got
[j
] = (bfd_vma
) -1;
6744 /* Then the global .got entries. .plt refcounts are handled by
6745 adjust_dynamic_symbol */
6746 elf_link_hash_traverse (elf_hash_table (info
),
6747 elf_gc_allocate_got_offsets
,
6752 /* We need a special top-level link routine to convert got reference counts
6753 to real got offsets. */
6756 elf_gc_allocate_got_offsets (h
, offarg
)
6757 struct elf_link_hash_entry
*h
;
6760 bfd_vma
*off
= (bfd_vma
*) offarg
;
6762 if (h
->got
.refcount
> 0)
6764 h
->got
.offset
= off
[0];
6765 off
[0] += ARCH_SIZE
/ 8;
6768 h
->got
.offset
= (bfd_vma
) -1;
6773 /* Many folk need no more in the way of final link than this, once
6774 got entry reference counting is enabled. */
6777 elf_gc_common_final_link (abfd
, info
)
6779 struct bfd_link_info
*info
;
6781 if (!elf_gc_common_finalize_got_offsets (abfd
, info
))
6784 /* Invoke the regular ELF backend linker to do all the work. */
6785 return elf_bfd_final_link (abfd
, info
);
6788 /* This function will be called though elf_link_hash_traverse to store
6789 all hash value of the exported symbols in an array. */
6792 elf_collect_hash_codes (h
, data
)
6793 struct elf_link_hash_entry
*h
;
6796 unsigned long **valuep
= (unsigned long **) data
;
6802 /* Ignore indirect symbols. These are added by the versioning code. */
6803 if (h
->dynindx
== -1)
6806 name
= h
->root
.root
.string
;
6807 p
= strchr (name
, ELF_VER_CHR
);
6810 alc
= bfd_malloc (p
- name
+ 1);
6811 memcpy (alc
, name
, p
- name
);
6812 alc
[p
- name
] = '\0';
6816 /* Compute the hash value. */
6817 ha
= bfd_elf_hash (name
);
6819 /* Store the found hash value in the array given as the argument. */
6822 /* And store it in the struct so that we can put it in the hash table
6824 h
->elf_hash_value
= ha
;