2 Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* ELF linker code. */
23 static bfd_boolean
elf_link_add_object_symbols (bfd
*, struct bfd_link_info
*);
24 static bfd_boolean
elf_link_add_archive_symbols (bfd
*,
25 struct bfd_link_info
*);
26 static bfd_boolean
elf_finalize_dynstr (bfd
*, struct bfd_link_info
*);
27 static bfd_boolean
elf_collect_hash_codes (struct elf_link_hash_entry
*,
29 static bfd_boolean
elf_section_ignore_discarded_relocs (asection
*);
31 /* Given an ELF BFD, add symbols to the global hash table as
35 elf_bfd_link_add_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
37 switch (bfd_get_format (abfd
))
40 return elf_link_add_object_symbols (abfd
, info
);
42 return elf_link_add_archive_symbols (abfd
, info
);
44 bfd_set_error (bfd_error_wrong_format
);
49 /* Return TRUE iff this is a non-common, definition of a non-function symbol. */
51 is_global_data_symbol_definition (bfd
*abfd ATTRIBUTE_UNUSED
,
52 Elf_Internal_Sym
*sym
)
54 /* Local symbols do not count, but target specific ones might. */
55 if (ELF_ST_BIND (sym
->st_info
) != STB_GLOBAL
56 && ELF_ST_BIND (sym
->st_info
) < STB_LOOS
)
59 /* Function symbols do not count. */
60 if (ELF_ST_TYPE (sym
->st_info
) == STT_FUNC
)
63 /* If the section is undefined, then so is the symbol. */
64 if (sym
->st_shndx
== SHN_UNDEF
)
67 /* If the symbol is defined in the common section, then
68 it is a common definition and so does not count. */
69 if (sym
->st_shndx
== SHN_COMMON
)
72 /* If the symbol is in a target specific section then we
73 must rely upon the backend to tell us what it is. */
74 if (sym
->st_shndx
>= SHN_LORESERVE
&& sym
->st_shndx
< SHN_ABS
)
75 /* FIXME - this function is not coded yet:
77 return _bfd_is_global_symbol_definition (abfd, sym);
79 Instead for now assume that the definition is not global,
80 Even if this is wrong, at least the linker will behave
81 in the same way that it used to do. */
87 /* Search the symbol table of the archive element of the archive ABFD
88 whose archive map contains a mention of SYMDEF, and determine if
89 the symbol is defined in this element. */
91 elf_link_is_defined_archive_symbol (bfd
* abfd
, carsym
* symdef
)
93 Elf_Internal_Shdr
* hdr
;
94 bfd_size_type symcount
;
95 bfd_size_type extsymcount
;
96 bfd_size_type extsymoff
;
97 Elf_Internal_Sym
*isymbuf
;
98 Elf_Internal_Sym
*isym
;
99 Elf_Internal_Sym
*isymend
;
102 abfd
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
106 if (! bfd_check_format (abfd
, bfd_object
))
109 /* If we have already included the element containing this symbol in the
110 link then we do not need to include it again. Just claim that any symbol
111 it contains is not a definition, so that our caller will not decide to
112 (re)include this element. */
113 if (abfd
->archive_pass
)
116 /* Select the appropriate symbol table. */
117 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dynsymtab (abfd
) == 0)
118 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
120 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
122 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
124 /* The sh_info field of the symtab header tells us where the
125 external symbols start. We don't care about the local symbols. */
126 if (elf_bad_symtab (abfd
))
128 extsymcount
= symcount
;
133 extsymcount
= symcount
- hdr
->sh_info
;
134 extsymoff
= hdr
->sh_info
;
137 if (extsymcount
== 0)
140 /* Read in the symbol table. */
141 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
146 /* Scan the symbol table looking for SYMDEF. */
148 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
; isym
< isymend
; isym
++)
152 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
157 if (strcmp (name
, symdef
->name
) == 0)
159 result
= is_global_data_symbol_definition (abfd
, isym
);
169 /* Add symbols from an ELF archive file to the linker hash table. We
170 don't use _bfd_generic_link_add_archive_symbols because of a
171 problem which arises on UnixWare. The UnixWare libc.so is an
172 archive which includes an entry libc.so.1 which defines a bunch of
173 symbols. The libc.so archive also includes a number of other
174 object files, which also define symbols, some of which are the same
175 as those defined in libc.so.1. Correct linking requires that we
176 consider each object file in turn, and include it if it defines any
177 symbols we need. _bfd_generic_link_add_archive_symbols does not do
178 this; it looks through the list of undefined symbols, and includes
179 any object file which defines them. When this algorithm is used on
180 UnixWare, it winds up pulling in libc.so.1 early and defining a
181 bunch of symbols. This means that some of the other objects in the
182 archive are not included in the link, which is incorrect since they
183 precede libc.so.1 in the archive.
185 Fortunately, ELF archive handling is simpler than that done by
186 _bfd_generic_link_add_archive_symbols, which has to allow for a.out
187 oddities. In ELF, if we find a symbol in the archive map, and the
188 symbol is currently undefined, we know that we must pull in that
191 Unfortunately, we do have to make multiple passes over the symbol
192 table until nothing further is resolved. */
195 elf_link_add_archive_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
198 bfd_boolean
*defined
= NULL
;
199 bfd_boolean
*included
= NULL
;
204 if (! bfd_has_map (abfd
))
206 /* An empty archive is a special case. */
207 if (bfd_openr_next_archived_file (abfd
, NULL
) == NULL
)
209 bfd_set_error (bfd_error_no_armap
);
213 /* Keep track of all symbols we know to be already defined, and all
214 files we know to be already included. This is to speed up the
215 second and subsequent passes. */
216 c
= bfd_ardata (abfd
)->symdef_count
;
220 amt
*= sizeof (bfd_boolean
);
221 defined
= bfd_zmalloc (amt
);
222 included
= bfd_zmalloc (amt
);
223 if (defined
== NULL
|| included
== NULL
)
226 symdefs
= bfd_ardata (abfd
)->symdefs
;
239 symdefend
= symdef
+ c
;
240 for (i
= 0; symdef
< symdefend
; symdef
++, i
++)
242 struct elf_link_hash_entry
*h
;
244 struct bfd_link_hash_entry
*undefs_tail
;
247 if (defined
[i
] || included
[i
])
249 if (symdef
->file_offset
== last
)
255 h
= elf_link_hash_lookup (elf_hash_table (info
), symdef
->name
,
256 FALSE
, FALSE
, FALSE
);
263 /* If this is a default version (the name contains @@),
264 look up the symbol again with only one `@' as well
265 as without the version. The effect is that references
266 to the symbol with and without the version will be
267 matched by the default symbol in the archive. */
269 p
= strchr (symdef
->name
, ELF_VER_CHR
);
270 if (p
== NULL
|| p
[1] != ELF_VER_CHR
)
273 /* First check with only one `@'. */
274 len
= strlen (symdef
->name
);
275 copy
= bfd_alloc (abfd
, len
);
278 first
= p
- symdef
->name
+ 1;
279 memcpy (copy
, symdef
->name
, first
);
280 memcpy (copy
+ first
, symdef
->name
+ first
+ 1, len
- first
);
282 h
= elf_link_hash_lookup (elf_hash_table (info
), copy
,
283 FALSE
, FALSE
, FALSE
);
287 /* We also need to check references to the symbol
288 without the version. */
290 copy
[first
- 1] = '\0';
291 h
= elf_link_hash_lookup (elf_hash_table (info
),
292 copy
, FALSE
, FALSE
, FALSE
);
295 bfd_release (abfd
, copy
);
301 if (h
->root
.type
== bfd_link_hash_common
)
303 /* We currently have a common symbol. The archive map contains
304 a reference to this symbol, so we may want to include it. We
305 only want to include it however, if this archive element
306 contains a definition of the symbol, not just another common
309 Unfortunately some archivers (including GNU ar) will put
310 declarations of common symbols into their archive maps, as
311 well as real definitions, so we cannot just go by the archive
312 map alone. Instead we must read in the element's symbol
313 table and check that to see what kind of symbol definition
315 if (! elf_link_is_defined_archive_symbol (abfd
, symdef
))
318 else if (h
->root
.type
!= bfd_link_hash_undefined
)
320 if (h
->root
.type
!= bfd_link_hash_undefweak
)
325 /* We need to include this archive member. */
326 element
= _bfd_get_elt_at_filepos (abfd
, symdef
->file_offset
);
330 if (! bfd_check_format (element
, bfd_object
))
333 /* Doublecheck that we have not included this object
334 already--it should be impossible, but there may be
335 something wrong with the archive. */
336 if (element
->archive_pass
!= 0)
338 bfd_set_error (bfd_error_bad_value
);
341 element
->archive_pass
= 1;
343 undefs_tail
= info
->hash
->undefs_tail
;
345 if (! (*info
->callbacks
->add_archive_element
) (info
, element
,
348 if (! elf_link_add_object_symbols (element
, info
))
351 /* If there are any new undefined symbols, we need to make
352 another pass through the archive in order to see whether
353 they can be defined. FIXME: This isn't perfect, because
354 common symbols wind up on undefs_tail and because an
355 undefined symbol which is defined later on in this pass
356 does not require another pass. This isn't a bug, but it
357 does make the code less efficient than it could be. */
358 if (undefs_tail
!= info
->hash
->undefs_tail
)
361 /* Look backward to mark all symbols from this object file
362 which we have already seen in this pass. */
366 included
[mark
] = TRUE
;
371 while (symdefs
[mark
].file_offset
== symdef
->file_offset
);
373 /* We mark subsequent symbols from this object file as we go
374 on through the loop. */
375 last
= symdef
->file_offset
;
388 if (included
!= NULL
)
393 /* Add symbols from an ELF object file to the linker hash table. */
396 elf_link_add_object_symbols (bfd
*abfd
, struct bfd_link_info
*info
)
398 bfd_boolean (*add_symbol_hook
)
399 (bfd
*, struct bfd_link_info
*, const Elf_Internal_Sym
*,
400 const char **, flagword
*, asection
**, bfd_vma
*);
401 bfd_boolean (*check_relocs
)
402 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
404 Elf_Internal_Shdr
*hdr
;
405 bfd_size_type symcount
;
406 bfd_size_type extsymcount
;
407 bfd_size_type extsymoff
;
408 struct elf_link_hash_entry
**sym_hash
;
410 Elf_External_Versym
*extversym
= NULL
;
411 Elf_External_Versym
*ever
;
412 struct elf_link_hash_entry
*weaks
;
413 struct elf_link_hash_entry
**nondeflt_vers
= NULL
;
414 bfd_size_type nondeflt_vers_cnt
= 0;
415 Elf_Internal_Sym
*isymbuf
= NULL
;
416 Elf_Internal_Sym
*isym
;
417 Elf_Internal_Sym
*isymend
;
418 const struct elf_backend_data
*bed
;
419 bfd_boolean dt_needed
;
420 struct elf_link_hash_table
* hash_table
;
423 hash_table
= elf_hash_table (info
);
425 bed
= get_elf_backend_data (abfd
);
426 add_symbol_hook
= bed
->elf_add_symbol_hook
;
427 collect
= bed
->collect
;
429 if ((abfd
->flags
& DYNAMIC
) == 0)
435 /* You can't use -r against a dynamic object. Also, there's no
436 hope of using a dynamic object which does not exactly match
437 the format of the output file. */
438 if (info
->relocatable
|| info
->hash
->creator
!= abfd
->xvec
)
440 bfd_set_error (bfd_error_invalid_operation
);
445 /* As a GNU extension, any input sections which are named
446 .gnu.warning.SYMBOL are treated as warning symbols for the given
447 symbol. This differs from .gnu.warning sections, which generate
448 warnings when they are included in an output file. */
449 if (info
->executable
)
453 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
457 name
= bfd_get_section_name (abfd
, s
);
458 if (strncmp (name
, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0)
462 bfd_size_type prefix_len
;
463 const char * gnu_warning_prefix
= _("warning: ");
465 name
+= sizeof ".gnu.warning." - 1;
467 /* If this is a shared object, then look up the symbol
468 in the hash table. If it is there, and it is already
469 been defined, then we will not be using the entry
470 from this shared object, so we don't need to warn.
471 FIXME: If we see the definition in a regular object
472 later on, we will warn, but we shouldn't. The only
473 fix is to keep track of what warnings we are supposed
474 to emit, and then handle them all at the end of the
476 if (dynamic
&& abfd
->xvec
== info
->hash
->creator
)
478 struct elf_link_hash_entry
*h
;
480 h
= elf_link_hash_lookup (hash_table
, name
,
483 /* FIXME: What about bfd_link_hash_common? */
485 && (h
->root
.type
== bfd_link_hash_defined
486 || h
->root
.type
== bfd_link_hash_defweak
))
488 /* We don't want to issue this warning. Clobber
489 the section size so that the warning does not
490 get copied into the output file. */
496 sz
= bfd_section_size (abfd
, s
);
497 prefix_len
= strlen (gnu_warning_prefix
);
498 msg
= bfd_alloc (abfd
, prefix_len
+ sz
+ 1);
502 strcpy (msg
, gnu_warning_prefix
);
503 if (! bfd_get_section_contents (abfd
, s
, msg
+ prefix_len
, 0, sz
))
506 msg
[prefix_len
+ sz
] = '\0';
508 if (! (_bfd_generic_link_add_one_symbol
509 (info
, abfd
, name
, BSF_WARNING
, s
, 0, msg
,
510 FALSE
, collect
, NULL
)))
513 if (! info
->relocatable
)
515 /* Clobber the section size so that the warning does
516 not get copied into the output file. */
526 /* If we are creating a shared library, create all the dynamic
527 sections immediately. We need to attach them to something,
528 so we attach them to this BFD, provided it is the right
529 format. FIXME: If there are no input BFD's of the same
530 format as the output, we can't make a shared library. */
532 && is_elf_hash_table (info
)
533 && ! hash_table
->dynamic_sections_created
534 && abfd
->xvec
== info
->hash
->creator
)
536 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
540 else if (! is_elf_hash_table (info
))
545 bfd_boolean add_needed
;
547 bfd_size_type oldsize
;
548 bfd_size_type strindex
;
549 struct bfd_link_needed_list
*rpath
= NULL
, *runpath
= NULL
;
551 /* ld --just-symbols and dynamic objects don't mix very well.
552 Test for --just-symbols by looking at info set up by
553 _bfd_elf_link_just_syms. */
554 if ((s
= abfd
->sections
) != NULL
555 && s
->sec_info_type
== ELF_INFO_TYPE_JUST_SYMS
)
558 /* Find the name to use in a DT_NEEDED entry that refers to this
559 object. If the object has a DT_SONAME entry, we use it.
560 Otherwise, if the generic linker stuck something in
561 elf_dt_name, we use that. Otherwise, we just use the file
562 name. If the generic linker put a null string into
563 elf_dt_name, we don't make a DT_NEEDED entry at all, even if
564 there is a DT_SONAME entry. */
566 name
= bfd_get_filename (abfd
);
567 if (elf_dt_name (abfd
) != NULL
)
569 name
= elf_dt_name (abfd
);
572 if (elf_dt_soname (abfd
) != NULL
)
578 s
= bfd_get_section_by_name (abfd
, ".dynamic");
581 Elf_External_Dyn
*dynbuf
= NULL
;
582 Elf_External_Dyn
*extdyn
;
583 Elf_External_Dyn
*extdynend
;
585 unsigned long shlink
;
587 dynbuf
= bfd_malloc (s
->_raw_size
);
591 if (! bfd_get_section_contents (abfd
, s
, dynbuf
, 0, s
->_raw_size
))
594 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
597 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
600 extdynend
= extdyn
+ s
->_raw_size
/ sizeof (Elf_External_Dyn
);
601 for (; extdyn
< extdynend
; extdyn
++)
603 Elf_Internal_Dyn dyn
;
605 elf_swap_dyn_in (abfd
, extdyn
, &dyn
);
606 if (dyn
.d_tag
== DT_SONAME
)
608 unsigned int tagv
= dyn
.d_un
.d_val
;
609 name
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
613 if (dyn
.d_tag
== DT_NEEDED
)
615 struct bfd_link_needed_list
*n
, **pn
;
617 unsigned int tagv
= dyn
.d_un
.d_val
;
619 amt
= sizeof (struct bfd_link_needed_list
);
620 n
= bfd_alloc (abfd
, amt
);
621 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
622 if (n
== NULL
|| fnm
== NULL
)
624 amt
= strlen (fnm
) + 1;
625 anm
= bfd_alloc (abfd
, amt
);
628 memcpy (anm
, fnm
, amt
);
632 for (pn
= & hash_table
->needed
;
638 if (dyn
.d_tag
== DT_RUNPATH
)
640 struct bfd_link_needed_list
*n
, **pn
;
642 unsigned int tagv
= dyn
.d_un
.d_val
;
644 amt
= sizeof (struct bfd_link_needed_list
);
645 n
= bfd_alloc (abfd
, amt
);
646 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
647 if (n
== NULL
|| fnm
== NULL
)
649 amt
= strlen (fnm
) + 1;
650 anm
= bfd_alloc (abfd
, amt
);
653 memcpy (anm
, fnm
, amt
);
663 /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
664 if (!runpath
&& dyn
.d_tag
== DT_RPATH
)
666 struct bfd_link_needed_list
*n
, **pn
;
668 unsigned int tagv
= dyn
.d_un
.d_val
;
670 amt
= sizeof (struct bfd_link_needed_list
);
671 n
= bfd_alloc (abfd
, amt
);
672 fnm
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
673 if (n
== NULL
|| fnm
== NULL
)
675 amt
= strlen (fnm
) + 1;
676 anm
= bfd_alloc (abfd
, amt
);
683 memcpy (anm
, fnm
, amt
);
698 /* DT_RUNPATH overrides DT_RPATH. Do _NOT_ bfd_release, as that
699 frees all more recently bfd_alloc'd blocks as well. */
705 struct bfd_link_needed_list
**pn
;
706 for (pn
= & hash_table
->runpath
;
713 /* We do not want to include any of the sections in a dynamic
714 object in the output file. We hack by simply clobbering the
715 list of sections in the BFD. This could be handled more
716 cleanly by, say, a new section flag; the existing
717 SEC_NEVER_LOAD flag is not the one we want, because that one
718 still implies that the section takes up space in the output
720 bfd_section_list_clear (abfd
);
722 /* If this is the first dynamic object found in the link, create
723 the special sections required for dynamic linking. */
724 if (! hash_table
->dynamic_sections_created
)
725 if (! _bfd_elf_link_create_dynamic_sections (abfd
, info
))
730 /* Add a DT_NEEDED entry for this dynamic object. */
731 oldsize
= _bfd_elf_strtab_size (hash_table
->dynstr
);
732 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
, name
, FALSE
);
733 if (strindex
== (bfd_size_type
) -1)
736 if (oldsize
== _bfd_elf_strtab_size (hash_table
->dynstr
))
739 Elf_External_Dyn
*dyncon
, *dynconend
;
741 /* The hash table size did not change, which means that
742 the dynamic object name was already entered. If we
743 have already included this dynamic object in the
744 link, just ignore it. There is no reason to include
745 a particular dynamic object more than once. */
746 sdyn
= bfd_get_section_by_name (hash_table
->dynobj
, ".dynamic");
747 BFD_ASSERT (sdyn
!= NULL
);
749 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
750 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
752 for (; dyncon
< dynconend
; dyncon
++)
754 Elf_Internal_Dyn dyn
;
756 elf_swap_dyn_in (hash_table
->dynobj
, dyncon
, & dyn
);
757 if (dyn
.d_tag
== DT_NEEDED
758 && dyn
.d_un
.d_val
== strindex
)
760 _bfd_elf_strtab_delref (hash_table
->dynstr
, strindex
);
766 if (! elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
770 /* Save the SONAME, if there is one, because sometimes the
771 linker emulation code will need to know it. */
773 name
= basename (bfd_get_filename (abfd
));
774 elf_dt_name (abfd
) = name
;
777 /* If this is a dynamic object, we always link against the .dynsym
778 symbol table, not the .symtab symbol table. The dynamic linker
779 will only see the .dynsym symbol table, so there is no reason to
780 look at .symtab for a dynamic object. */
782 if (! dynamic
|| elf_dynsymtab (abfd
) == 0)
783 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
785 hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
787 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
789 /* The sh_info field of the symtab header tells us where the
790 external symbols start. We don't care about the local symbols at
792 if (elf_bad_symtab (abfd
))
794 extsymcount
= symcount
;
799 extsymcount
= symcount
- hdr
->sh_info
;
800 extsymoff
= hdr
->sh_info
;
804 if (extsymcount
!= 0)
806 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, extsymcount
, extsymoff
,
811 /* We store a pointer to the hash table entry for each external
813 amt
= extsymcount
* sizeof (struct elf_link_hash_entry
*);
814 sym_hash
= bfd_alloc (abfd
, amt
);
815 if (sym_hash
== NULL
)
817 elf_sym_hashes (abfd
) = sym_hash
;
822 /* Read in any version definitions. */
823 if (! _bfd_elf_slurp_version_tables (abfd
))
826 /* Read in the symbol versions, but don't bother to convert them
827 to internal format. */
828 if (elf_dynversym (abfd
) != 0)
830 Elf_Internal_Shdr
*versymhdr
;
832 versymhdr
= &elf_tdata (abfd
)->dynversym_hdr
;
833 extversym
= bfd_malloc (versymhdr
->sh_size
);
834 if (extversym
== NULL
)
836 amt
= versymhdr
->sh_size
;
837 if (bfd_seek (abfd
, versymhdr
->sh_offset
, SEEK_SET
) != 0
838 || bfd_bread (extversym
, amt
, abfd
) != amt
)
839 goto error_free_vers
;
845 ever
= extversym
!= NULL
? extversym
+ extsymoff
: NULL
;
846 for (isym
= isymbuf
, isymend
= isymbuf
+ extsymcount
;
848 isym
++, sym_hash
++, ever
= (ever
!= NULL
? ever
+ 1 : NULL
))
855 struct elf_link_hash_entry
*h
;
856 bfd_boolean definition
;
857 bfd_boolean size_change_ok
;
858 bfd_boolean type_change_ok
;
859 bfd_boolean new_weakdef
;
860 bfd_boolean override
;
861 unsigned int old_alignment
;
866 flags
= BSF_NO_FLAGS
;
868 value
= isym
->st_value
;
871 bind
= ELF_ST_BIND (isym
->st_info
);
872 if (bind
== STB_LOCAL
)
874 /* This should be impossible, since ELF requires that all
875 global symbols follow all local symbols, and that sh_info
876 point to the first global symbol. Unfortunatealy, Irix 5
880 else if (bind
== STB_GLOBAL
)
882 if (isym
->st_shndx
!= SHN_UNDEF
883 && isym
->st_shndx
!= SHN_COMMON
)
886 else if (bind
== STB_WEAK
)
890 /* Leave it up to the processor backend. */
893 if (isym
->st_shndx
== SHN_UNDEF
)
894 sec
= bfd_und_section_ptr
;
895 else if (isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
897 sec
= section_from_elf_index (abfd
, isym
->st_shndx
);
899 sec
= bfd_abs_section_ptr
;
900 else if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) != 0)
903 else if (isym
->st_shndx
== SHN_ABS
)
904 sec
= bfd_abs_section_ptr
;
905 else if (isym
->st_shndx
== SHN_COMMON
)
907 sec
= bfd_com_section_ptr
;
908 /* What ELF calls the size we call the value. What ELF
909 calls the value we call the alignment. */
910 value
= isym
->st_size
;
914 /* Leave it up to the processor backend. */
917 name
= bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
920 goto error_free_vers
;
922 if (isym
->st_shndx
== SHN_COMMON
923 && ELF_ST_TYPE (isym
->st_info
) == STT_TLS
)
925 asection
*tcomm
= bfd_get_section_by_name (abfd
, ".tcommon");
929 tcomm
= bfd_make_section (abfd
, ".tcommon");
931 || !bfd_set_section_flags (abfd
, tcomm
, (SEC_ALLOC
934 | SEC_THREAD_LOCAL
)))
935 goto error_free_vers
;
939 else if (add_symbol_hook
)
941 if (! (*add_symbol_hook
) (abfd
, info
, isym
, &name
, &flags
, &sec
,
943 goto error_free_vers
;
945 /* The hook function sets the name to NULL if this symbol
946 should be skipped for some reason. */
951 /* Sanity check that all possibilities were handled. */
954 bfd_set_error (bfd_error_bad_value
);
955 goto error_free_vers
;
958 if (bfd_is_und_section (sec
)
959 || bfd_is_com_section (sec
))
964 size_change_ok
= FALSE
;
965 type_change_ok
= get_elf_backend_data (abfd
)->type_change_ok
;
969 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
971 Elf_Internal_Versym iver
;
972 unsigned int vernum
= 0;
977 _bfd_elf_swap_versym_in (abfd
, ever
, &iver
);
978 vernum
= iver
.vs_vers
& VERSYM_VERSION
;
980 /* If this is a hidden symbol, or if it is not version
981 1, we append the version name to the symbol name.
982 However, we do not modify a non-hidden absolute
983 symbol, because it might be the version symbol
984 itself. FIXME: What if it isn't? */
985 if ((iver
.vs_vers
& VERSYM_HIDDEN
) != 0
986 || (vernum
> 1 && ! bfd_is_abs_section (sec
)))
989 size_t namelen
, verlen
, newlen
;
992 if (isym
->st_shndx
!= SHN_UNDEF
)
994 if (vernum
> elf_tdata (abfd
)->dynverdef_hdr
.sh_info
)
996 (*_bfd_error_handler
)
997 (_("%s: %s: invalid version %u (max %d)"),
998 bfd_archive_filename (abfd
), name
, vernum
,
999 elf_tdata (abfd
)->dynverdef_hdr
.sh_info
);
1000 bfd_set_error (bfd_error_bad_value
);
1001 goto error_free_vers
;
1003 else if (vernum
> 1)
1005 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1011 /* We cannot simply test for the number of
1012 entries in the VERNEED section since the
1013 numbers for the needed versions do not start
1015 Elf_Internal_Verneed
*t
;
1018 for (t
= elf_tdata (abfd
)->verref
;
1022 Elf_Internal_Vernaux
*a
;
1024 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1026 if (a
->vna_other
== vernum
)
1028 verstr
= a
->vna_nodename
;
1037 (*_bfd_error_handler
)
1038 (_("%s: %s: invalid needed version %d"),
1039 bfd_archive_filename (abfd
), name
, vernum
);
1040 bfd_set_error (bfd_error_bad_value
);
1041 goto error_free_vers
;
1045 namelen
= strlen (name
);
1046 verlen
= strlen (verstr
);
1047 newlen
= namelen
+ verlen
+ 2;
1048 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
1049 && isym
->st_shndx
!= SHN_UNDEF
)
1052 newname
= bfd_alloc (abfd
, newlen
);
1053 if (newname
== NULL
)
1054 goto error_free_vers
;
1055 memcpy (newname
, name
, namelen
);
1056 p
= newname
+ namelen
;
1058 /* If this is a defined non-hidden version symbol,
1059 we add another @ to the name. This indicates the
1060 default version of the symbol. */
1061 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0
1062 && isym
->st_shndx
!= SHN_UNDEF
)
1064 memcpy (p
, verstr
, verlen
+ 1);
1070 if (!_bfd_elf_merge_symbol (abfd
, info
, name
, isym
, &sec
, &value
,
1071 sym_hash
, &skip
, &override
,
1072 &type_change_ok
, &size_change_ok
,
1074 goto error_free_vers
;
1083 while (h
->root
.type
== bfd_link_hash_indirect
1084 || h
->root
.type
== bfd_link_hash_warning
)
1085 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1087 /* Remember the old alignment if this is a common symbol, so
1088 that we don't reduce the alignment later on. We can't
1089 check later, because _bfd_generic_link_add_one_symbol
1090 will set a default for the alignment which we want to
1091 override. We also remember the old bfd where the existing
1092 definition comes from. */
1093 switch (h
->root
.type
)
1098 case bfd_link_hash_defined
:
1099 case bfd_link_hash_defweak
:
1100 old_bfd
= h
->root
.u
.def
.section
->owner
;
1103 case bfd_link_hash_common
:
1104 old_bfd
= h
->root
.u
.c
.p
->section
->owner
;
1105 old_alignment
= h
->root
.u
.c
.p
->alignment_power
;
1109 if (elf_tdata (abfd
)->verdef
!= NULL
1113 h
->verinfo
.verdef
= &elf_tdata (abfd
)->verdef
[vernum
- 1];
1116 if (! (_bfd_generic_link_add_one_symbol
1117 (info
, abfd
, name
, flags
, sec
, value
, NULL
, FALSE
, collect
,
1118 (struct bfd_link_hash_entry
**) sym_hash
)))
1119 goto error_free_vers
;
1122 while (h
->root
.type
== bfd_link_hash_indirect
1123 || h
->root
.type
== bfd_link_hash_warning
)
1124 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1127 new_weakdef
= FALSE
;
1130 && (flags
& BSF_WEAK
) != 0
1131 && ELF_ST_TYPE (isym
->st_info
) != STT_FUNC
1132 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
1133 && h
->weakdef
== NULL
)
1135 /* Keep a list of all weak defined non function symbols from
1136 a dynamic object, using the weakdef field. Later in this
1137 function we will set the weakdef field to the correct
1138 value. We only put non-function symbols from dynamic
1139 objects on this list, because that happens to be the only
1140 time we need to know the normal symbol corresponding to a
1141 weak symbol, and the information is time consuming to
1142 figure out. If the weakdef field is not already NULL,
1143 then this symbol was already defined by some previous
1144 dynamic object, and we will be using that previous
1145 definition anyhow. */
1152 /* Set the alignment of a common symbol. */
1153 if (isym
->st_shndx
== SHN_COMMON
1154 && h
->root
.type
== bfd_link_hash_common
)
1158 align
= bfd_log2 (isym
->st_value
);
1159 if (align
> old_alignment
1160 /* Permit an alignment power of zero if an alignment of one
1161 is specified and no other alignments have been specified. */
1162 || (isym
->st_value
== 1 && old_alignment
== 0))
1163 h
->root
.u
.c
.p
->alignment_power
= align
;
1165 h
->root
.u
.c
.p
->alignment_power
= old_alignment
;
1168 if (info
->hash
->creator
->flavour
== bfd_target_elf_flavour
)
1174 /* Check the alignment when a common symbol is involved. This
1175 can change when a common symbol is overriden by a normal
1176 definition or a common symbol is ignored due to the old
1177 normal definition. We need to make sure the maximum
1178 alignment is maintained. */
1179 if ((old_alignment
|| isym
->st_shndx
== SHN_COMMON
)
1180 && h
->root
.type
!= bfd_link_hash_common
)
1182 unsigned int common_align
;
1183 unsigned int normal_align
;
1184 unsigned int symbol_align
;
1188 symbol_align
= ffs (h
->root
.u
.def
.value
) - 1;
1189 if (h
->root
.u
.def
.section
->owner
!= NULL
1190 && (h
->root
.u
.def
.section
->owner
->flags
& DYNAMIC
) == 0)
1192 normal_align
= h
->root
.u
.def
.section
->alignment_power
;
1193 if (normal_align
> symbol_align
)
1194 normal_align
= symbol_align
;
1197 normal_align
= symbol_align
;
1201 common_align
= old_alignment
;
1202 common_bfd
= old_bfd
;
1207 common_align
= bfd_log2 (isym
->st_value
);
1209 normal_bfd
= old_bfd
;
1212 if (normal_align
< common_align
)
1213 (*_bfd_error_handler
)
1214 (_("Warning: alignment %u of symbol `%s' in %s is smaller than %u in %s"),
1217 bfd_archive_filename (normal_bfd
),
1219 bfd_archive_filename (common_bfd
));
1222 /* Remember the symbol size and type. */
1223 if (isym
->st_size
!= 0
1224 && (definition
|| h
->size
== 0))
1226 if (h
->size
!= 0 && h
->size
!= isym
->st_size
&& ! size_change_ok
)
1227 (*_bfd_error_handler
)
1228 (_("Warning: size of symbol `%s' changed from %lu in %s to %lu in %s"),
1229 name
, (unsigned long) h
->size
,
1230 bfd_archive_filename (old_bfd
),
1231 (unsigned long) isym
->st_size
,
1232 bfd_archive_filename (abfd
));
1234 h
->size
= isym
->st_size
;
1237 /* If this is a common symbol, then we always want H->SIZE
1238 to be the size of the common symbol. The code just above
1239 won't fix the size if a common symbol becomes larger. We
1240 don't warn about a size change here, because that is
1241 covered by --warn-common. */
1242 if (h
->root
.type
== bfd_link_hash_common
)
1243 h
->size
= h
->root
.u
.c
.size
;
1245 if (ELF_ST_TYPE (isym
->st_info
) != STT_NOTYPE
1246 && (definition
|| h
->type
== STT_NOTYPE
))
1248 if (h
->type
!= STT_NOTYPE
1249 && h
->type
!= ELF_ST_TYPE (isym
->st_info
)
1250 && ! type_change_ok
)
1251 (*_bfd_error_handler
)
1252 (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
1253 name
, h
->type
, ELF_ST_TYPE (isym
->st_info
),
1254 bfd_archive_filename (abfd
));
1256 h
->type
= ELF_ST_TYPE (isym
->st_info
);
1259 /* If st_other has a processor-specific meaning, specific
1260 code might be needed here. We never merge the visibility
1261 attribute with the one from a dynamic object. */
1262 if (isym
->st_other
!= 0 && !dynamic
)
1264 unsigned char hvis
, symvis
, other
, nvis
;
1266 /* Take the balance of OTHER from the definition. */
1267 other
= (definition
? isym
->st_other
: h
->other
);
1268 other
&= ~ ELF_ST_VISIBILITY (-1);
1270 /* Combine visibilities, using the most constraining one. */
1271 hvis
= ELF_ST_VISIBILITY (h
->other
);
1272 symvis
= ELF_ST_VISIBILITY (isym
->st_other
);
1278 nvis
= hvis
< symvis
? hvis
: symvis
;
1280 h
->other
= other
| nvis
;
1283 /* Set a flag in the hash table entry indicating the type of
1284 reference or definition we just found. Keep a count of
1285 the number of dynamic symbols we find. A dynamic symbol
1286 is one which is referenced or defined by both a regular
1287 object and a shared object. */
1288 old_flags
= h
->elf_link_hash_flags
;
1294 new_flag
= ELF_LINK_HASH_REF_REGULAR
;
1295 if (bind
!= STB_WEAK
)
1296 new_flag
|= ELF_LINK_HASH_REF_REGULAR_NONWEAK
;
1299 new_flag
= ELF_LINK_HASH_DEF_REGULAR
;
1300 if (! info
->executable
1301 || (old_flags
& (ELF_LINK_HASH_DEF_DYNAMIC
1302 | ELF_LINK_HASH_REF_DYNAMIC
)) != 0)
1308 new_flag
= ELF_LINK_HASH_REF_DYNAMIC
;
1310 new_flag
= ELF_LINK_HASH_DEF_DYNAMIC
;
1311 if ((old_flags
& (ELF_LINK_HASH_DEF_REGULAR
1312 | ELF_LINK_HASH_REF_REGULAR
)) != 0
1313 || (h
->weakdef
!= NULL
1315 && h
->weakdef
->dynindx
!= -1))
1319 h
->elf_link_hash_flags
|= new_flag
;
1321 /* Check to see if we need to add an indirect symbol for
1322 the default name. */
1323 if (definition
|| h
->root
.type
== bfd_link_hash_common
)
1324 if (!_bfd_elf_add_default_symbol (abfd
, info
, h
, name
, isym
,
1325 &sec
, &value
, &dynsym
,
1326 override
, dt_needed
))
1327 goto error_free_vers
;
1329 if (definition
&& !dynamic
)
1331 char *p
= strchr (name
, ELF_VER_CHR
);
1332 if (p
!= NULL
&& p
[1] != ELF_VER_CHR
)
1334 /* Queue non-default versions so that .symver x, x@FOO
1335 aliases can be checked. */
1336 if (! nondeflt_vers
)
1338 amt
= (isymend
- isym
+ 1)
1339 * sizeof (struct elf_link_hash_entry
*);
1340 nondeflt_vers
= bfd_malloc (amt
);
1342 nondeflt_vers
[nondeflt_vers_cnt
++] = h
;
1346 if (dynsym
&& h
->dynindx
== -1)
1348 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
1349 goto error_free_vers
;
1350 if (h
->weakdef
!= NULL
1352 && h
->weakdef
->dynindx
== -1)
1354 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
->weakdef
))
1355 goto error_free_vers
;
1358 else if (dynsym
&& h
->dynindx
!= -1)
1359 /* If the symbol already has a dynamic index, but
1360 visibility says it should not be visible, turn it into
1362 switch (ELF_ST_VISIBILITY (h
->other
))
1366 (*bed
->elf_backend_hide_symbol
) (info
, h
, TRUE
);
1370 if (dt_needed
&& definition
1371 && (h
->elf_link_hash_flags
1372 & ELF_LINK_HASH_REF_REGULAR
) != 0)
1374 bfd_size_type oldsize
;
1375 bfd_size_type strindex
;
1377 if (! is_elf_hash_table (info
))
1378 goto error_free_vers
;
1380 /* The symbol from a DT_NEEDED object is referenced from
1381 the regular object to create a dynamic executable. We
1382 have to make sure there is a DT_NEEDED entry for it. */
1385 oldsize
= _bfd_elf_strtab_size (hash_table
->dynstr
);
1386 strindex
= _bfd_elf_strtab_add (hash_table
->dynstr
,
1387 elf_dt_soname (abfd
), FALSE
);
1388 if (strindex
== (bfd_size_type
) -1)
1389 goto error_free_vers
;
1391 if (oldsize
== _bfd_elf_strtab_size (hash_table
->dynstr
))
1394 Elf_External_Dyn
*dyncon
, *dynconend
;
1396 sdyn
= bfd_get_section_by_name (hash_table
->dynobj
,
1398 BFD_ASSERT (sdyn
!= NULL
);
1400 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
1401 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
1403 for (; dyncon
< dynconend
; dyncon
++)
1405 Elf_Internal_Dyn dyn
;
1407 elf_swap_dyn_in (hash_table
->dynobj
,
1409 BFD_ASSERT (dyn
.d_tag
!= DT_NEEDED
||
1410 dyn
.d_un
.d_val
!= strindex
);
1414 if (! elf_add_dynamic_entry (info
, DT_NEEDED
, strindex
))
1415 goto error_free_vers
;
1420 /* Now that all the symbols from this input file are created, handle
1421 .symver foo, foo@BAR such that any relocs against foo become foo@BAR. */
1422 if (nondeflt_vers
!= NULL
)
1424 bfd_size_type cnt
, symidx
;
1426 for (cnt
= 0; cnt
< nondeflt_vers_cnt
; ++cnt
)
1428 struct elf_link_hash_entry
*h
= nondeflt_vers
[cnt
], *hi
;
1429 char *shortname
, *p
;
1431 p
= strchr (h
->root
.root
.string
, ELF_VER_CHR
);
1433 || (h
->root
.type
!= bfd_link_hash_defined
1434 && h
->root
.type
!= bfd_link_hash_defweak
))
1437 amt
= p
- h
->root
.root
.string
;
1438 shortname
= bfd_malloc (amt
+ 1);
1439 memcpy (shortname
, h
->root
.root
.string
, amt
);
1440 shortname
[amt
] = '\0';
1442 hi
= (struct elf_link_hash_entry
*)
1443 bfd_link_hash_lookup (info
->hash
, shortname
,
1444 FALSE
, FALSE
, FALSE
);
1446 && hi
->root
.type
== h
->root
.type
1447 && hi
->root
.u
.def
.value
== h
->root
.u
.def
.value
1448 && hi
->root
.u
.def
.section
== h
->root
.u
.def
.section
)
1450 (*bed
->elf_backend_hide_symbol
) (info
, hi
, TRUE
);
1451 hi
->root
.type
= bfd_link_hash_indirect
;
1452 hi
->root
.u
.i
.link
= (struct bfd_link_hash_entry
*) h
;
1453 (*bed
->elf_backend_copy_indirect_symbol
) (bed
, h
, hi
);
1454 sym_hash
= elf_sym_hashes (abfd
);
1456 for (symidx
= 0; symidx
< extsymcount
; ++symidx
)
1457 if (sym_hash
[symidx
] == hi
)
1459 sym_hash
[symidx
] = h
;
1465 free (nondeflt_vers
);
1466 nondeflt_vers
= NULL
;
1469 if (extversym
!= NULL
)
1475 if (isymbuf
!= NULL
)
1479 /* Now set the weakdefs field correctly for all the weak defined
1480 symbols we found. The only way to do this is to search all the
1481 symbols. Since we only need the information for non functions in
1482 dynamic objects, that's the only time we actually put anything on
1483 the list WEAKS. We need this information so that if a regular
1484 object refers to a symbol defined weakly in a dynamic object, the
1485 real symbol in the dynamic object is also put in the dynamic
1486 symbols; we also must arrange for both symbols to point to the
1487 same memory location. We could handle the general case of symbol
1488 aliasing, but a general symbol alias can only be generated in
1489 assembler code, handling it correctly would be very time
1490 consuming, and other ELF linkers don't handle general aliasing
1492 while (weaks
!= NULL
)
1494 struct elf_link_hash_entry
*hlook
;
1497 struct elf_link_hash_entry
**hpp
;
1498 struct elf_link_hash_entry
**hppend
;
1501 weaks
= hlook
->weakdef
;
1502 hlook
->weakdef
= NULL
;
1504 BFD_ASSERT (hlook
->root
.type
== bfd_link_hash_defined
1505 || hlook
->root
.type
== bfd_link_hash_defweak
1506 || hlook
->root
.type
== bfd_link_hash_common
1507 || hlook
->root
.type
== bfd_link_hash_indirect
);
1508 slook
= hlook
->root
.u
.def
.section
;
1509 vlook
= hlook
->root
.u
.def
.value
;
1511 hpp
= elf_sym_hashes (abfd
);
1512 hppend
= hpp
+ extsymcount
;
1513 for (; hpp
< hppend
; hpp
++)
1515 struct elf_link_hash_entry
*h
;
1518 if (h
!= NULL
&& h
!= hlook
1519 && h
->root
.type
== bfd_link_hash_defined
1520 && h
->root
.u
.def
.section
== slook
1521 && h
->root
.u
.def
.value
== vlook
)
1525 /* If the weak definition is in the list of dynamic
1526 symbols, make sure the real definition is put there
1528 if (hlook
->dynindx
!= -1
1529 && h
->dynindx
== -1)
1531 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
1535 /* If the real definition is in the list of dynamic
1536 symbols, make sure the weak definition is put there
1537 as well. If we don't do this, then the dynamic
1538 loader might not merge the entries for the real
1539 definition and the weak definition. */
1540 if (h
->dynindx
!= -1
1541 && hlook
->dynindx
== -1)
1543 if (! _bfd_elf_link_record_dynamic_symbol (info
, hlook
))
1551 /* If this object is the same format as the output object, and it is
1552 not a shared library, then let the backend look through the
1555 This is required to build global offset table entries and to
1556 arrange for dynamic relocs. It is not required for the
1557 particular common case of linking non PIC code, even when linking
1558 against shared libraries, but unfortunately there is no way of
1559 knowing whether an object file has been compiled PIC or not.
1560 Looking through the relocs is not particularly time consuming.
1561 The problem is that we must either (1) keep the relocs in memory,
1562 which causes the linker to require additional runtime memory or
1563 (2) read the relocs twice from the input file, which wastes time.
1564 This would be a good case for using mmap.
1566 I have no idea how to handle linking PIC code into a file of a
1567 different format. It probably can't be done. */
1568 check_relocs
= get_elf_backend_data (abfd
)->check_relocs
;
1570 && abfd
->xvec
== info
->hash
->creator
1571 && check_relocs
!= NULL
)
1575 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1577 Elf_Internal_Rela
*internal_relocs
;
1580 if ((o
->flags
& SEC_RELOC
) == 0
1581 || o
->reloc_count
== 0
1582 || ((info
->strip
== strip_all
|| info
->strip
== strip_debugger
)
1583 && (o
->flags
& SEC_DEBUGGING
) != 0)
1584 || bfd_is_abs_section (o
->output_section
))
1587 internal_relocs
= _bfd_elf_link_read_relocs (abfd
, o
, NULL
, NULL
,
1589 if (internal_relocs
== NULL
)
1592 ok
= (*check_relocs
) (abfd
, info
, o
, internal_relocs
);
1594 if (elf_section_data (o
)->relocs
!= internal_relocs
)
1595 free (internal_relocs
);
1602 /* If this is a non-traditional link, try to optimize the handling
1603 of the .stab/.stabstr sections. */
1605 && ! info
->traditional_format
1606 && info
->hash
->creator
->flavour
== bfd_target_elf_flavour
1607 && is_elf_hash_table (info
)
1608 && (info
->strip
!= strip_all
&& info
->strip
!= strip_debugger
))
1610 asection
*stab
, *stabstr
;
1612 stab
= bfd_get_section_by_name (abfd
, ".stab");
1614 && (stab
->flags
& SEC_MERGE
) == 0
1615 && !bfd_is_abs_section (stab
->output_section
))
1617 stabstr
= bfd_get_section_by_name (abfd
, ".stabstr");
1619 if (stabstr
!= NULL
)
1621 struct bfd_elf_section_data
*secdata
;
1623 secdata
= elf_section_data (stab
);
1624 if (! _bfd_link_section_stabs (abfd
,
1625 & hash_table
->stab_info
,
1627 &secdata
->sec_info
))
1629 if (secdata
->sec_info
)
1630 stab
->sec_info_type
= ELF_INFO_TYPE_STABS
;
1635 if (! info
->relocatable
&& ! dynamic
1636 && is_elf_hash_table (info
))
1640 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
1641 if ((s
->flags
& SEC_MERGE
) != 0
1642 && !bfd_is_abs_section (s
->output_section
))
1644 struct bfd_elf_section_data
*secdata
;
1646 secdata
= elf_section_data (s
);
1647 if (! _bfd_merge_section (abfd
,
1648 & hash_table
->merge_info
,
1649 s
, &secdata
->sec_info
))
1651 else if (secdata
->sec_info
)
1652 s
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
1656 if (is_elf_hash_table (info
))
1658 /* Add this bfd to the loaded list. */
1659 struct elf_link_loaded_list
*n
;
1661 n
= bfd_alloc (abfd
, sizeof (struct elf_link_loaded_list
));
1665 n
->next
= hash_table
->loaded
;
1666 hash_table
->loaded
= n
;
1672 if (nondeflt_vers
!= NULL
)
1673 free (nondeflt_vers
);
1674 if (extversym
!= NULL
)
1677 if (isymbuf
!= NULL
)
1683 /* Add an entry to the .dynamic table. */
1686 elf_add_dynamic_entry (struct bfd_link_info
*info
, bfd_vma tag
, bfd_vma val
)
1688 Elf_Internal_Dyn dyn
;
1691 bfd_size_type newsize
;
1692 bfd_byte
*newcontents
;
1694 if (! is_elf_hash_table (info
))
1697 dynobj
= elf_hash_table (info
)->dynobj
;
1699 s
= bfd_get_section_by_name (dynobj
, ".dynamic");
1700 BFD_ASSERT (s
!= NULL
);
1702 newsize
= s
->_raw_size
+ sizeof (Elf_External_Dyn
);
1703 newcontents
= bfd_realloc (s
->contents
, newsize
);
1704 if (newcontents
== NULL
)
1708 dyn
.d_un
.d_val
= val
;
1709 elf_swap_dyn_out (dynobj
, &dyn
,
1710 (Elf_External_Dyn
*) (newcontents
+ s
->_raw_size
));
1712 s
->_raw_size
= newsize
;
1713 s
->contents
= newcontents
;
1718 /* Array used to determine the number of hash table buckets to use
1719 based on the number of symbols there are. If there are fewer than
1720 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
1721 fewer than 37 we use 17 buckets, and so forth. We never use more
1722 than 32771 buckets. */
1724 static const size_t elf_buckets
[] =
1726 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
1730 /* Compute bucket count for hashing table. We do not use a static set
1731 of possible tables sizes anymore. Instead we determine for all
1732 possible reasonable sizes of the table the outcome (i.e., the
1733 number of collisions etc) and choose the best solution. The
1734 weighting functions are not too simple to allow the table to grow
1735 without bounds. Instead one of the weighting factors is the size.
1736 Therefore the result is always a good payoff between few collisions
1737 (= short chain lengths) and table size. */
1739 compute_bucket_count (struct bfd_link_info
*info
)
1741 size_t dynsymcount
= elf_hash_table (info
)->dynsymcount
;
1742 size_t best_size
= 0;
1743 unsigned long int *hashcodes
;
1744 unsigned long int *hashcodesp
;
1745 unsigned long int i
;
1748 /* Compute the hash values for all exported symbols. At the same
1749 time store the values in an array so that we could use them for
1752 amt
*= sizeof (unsigned long int);
1753 hashcodes
= bfd_malloc (amt
);
1754 if (hashcodes
== NULL
)
1756 hashcodesp
= hashcodes
;
1758 /* Put all hash values in HASHCODES. */
1759 elf_link_hash_traverse (elf_hash_table (info
),
1760 elf_collect_hash_codes
, &hashcodesp
);
1762 /* We have a problem here. The following code to optimize the table
1763 size requires an integer type with more the 32 bits. If
1764 BFD_HOST_U_64_BIT is set we know about such a type. */
1765 #ifdef BFD_HOST_U_64_BIT
1768 unsigned long int nsyms
= hashcodesp
- hashcodes
;
1771 BFD_HOST_U_64_BIT best_chlen
= ~((BFD_HOST_U_64_BIT
) 0);
1772 unsigned long int *counts
;
1774 /* Possible optimization parameters: if we have NSYMS symbols we say
1775 that the hashing table must at least have NSYMS/4 and at most
1777 minsize
= nsyms
/ 4;
1780 best_size
= maxsize
= nsyms
* 2;
1782 /* Create array where we count the collisions in. We must use bfd_malloc
1783 since the size could be large. */
1785 amt
*= sizeof (unsigned long int);
1786 counts
= bfd_malloc (amt
);
1793 /* Compute the "optimal" size for the hash table. The criteria is a
1794 minimal chain length. The minor criteria is (of course) the size
1796 for (i
= minsize
; i
< maxsize
; ++i
)
1798 /* Walk through the array of hashcodes and count the collisions. */
1799 BFD_HOST_U_64_BIT max
;
1800 unsigned long int j
;
1801 unsigned long int fact
;
1803 memset (counts
, '\0', i
* sizeof (unsigned long int));
1805 /* Determine how often each hash bucket is used. */
1806 for (j
= 0; j
< nsyms
; ++j
)
1807 ++counts
[hashcodes
[j
] % i
];
1809 /* For the weight function we need some information about the
1810 pagesize on the target. This is information need not be 100%
1811 accurate. Since this information is not available (so far) we
1812 define it here to a reasonable default value. If it is crucial
1813 to have a better value some day simply define this value. */
1814 # ifndef BFD_TARGET_PAGESIZE
1815 # define BFD_TARGET_PAGESIZE (4096)
1818 /* We in any case need 2 + NSYMS entries for the size values and
1820 max
= (2 + nsyms
) * (ARCH_SIZE
/ 8);
1823 /* Variant 1: optimize for short chains. We add the squares
1824 of all the chain lengths (which favous many small chain
1825 over a few long chains). */
1826 for (j
= 0; j
< i
; ++j
)
1827 max
+= counts
[j
] * counts
[j
];
1829 /* This adds penalties for the overall size of the table. */
1830 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
1833 /* Variant 2: Optimize a lot more for small table. Here we
1834 also add squares of the size but we also add penalties for
1835 empty slots (the +1 term). */
1836 for (j
= 0; j
< i
; ++j
)
1837 max
+= (1 + counts
[j
]) * (1 + counts
[j
]);
1839 /* The overall size of the table is considered, but not as
1840 strong as in variant 1, where it is squared. */
1841 fact
= i
/ (BFD_TARGET_PAGESIZE
/ (ARCH_SIZE
/ 8)) + 1;
1845 /* Compare with current best results. */
1846 if (max
< best_chlen
)
1856 #endif /* defined (BFD_HOST_U_64_BIT) */
1858 /* This is the fallback solution if no 64bit type is available or if we
1859 are not supposed to spend much time on optimizations. We select the
1860 bucket count using a fixed set of numbers. */
1861 for (i
= 0; elf_buckets
[i
] != 0; i
++)
1863 best_size
= elf_buckets
[i
];
1864 if (dynsymcount
< elf_buckets
[i
+ 1])
1869 /* Free the arrays we needed. */
1875 /* Set up the sizes and contents of the ELF dynamic sections. This is
1876 called by the ELF linker emulation before_allocation routine. We
1877 must set the sizes of the sections before the linker sets the
1878 addresses of the various sections. */
1881 NAME(bfd_elf
,size_dynamic_sections
) (bfd
*output_bfd
,
1884 const char *filter_shlib
,
1885 const char * const *auxiliary_filters
,
1886 struct bfd_link_info
*info
,
1887 asection
**sinterpptr
,
1888 struct bfd_elf_version_tree
*verdefs
)
1890 bfd_size_type soname_indx
;
1892 const struct elf_backend_data
*bed
;
1893 struct elf_assign_sym_version_info asvinfo
;
1897 soname_indx
= (bfd_size_type
) -1;
1899 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
1902 if (! is_elf_hash_table (info
))
1905 if (info
->execstack
)
1906 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
| PF_X
;
1907 else if (info
->noexecstack
)
1908 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
;
1912 asection
*notesec
= NULL
;
1915 for (inputobj
= info
->input_bfds
;
1917 inputobj
= inputobj
->link_next
)
1921 if (inputobj
->flags
& DYNAMIC
)
1923 s
= bfd_get_section_by_name (inputobj
, ".note.GNU-stack");
1926 if (s
->flags
& SEC_CODE
)
1935 elf_tdata (output_bfd
)->stack_flags
= PF_R
| PF_W
| exec
;
1936 if (exec
&& info
->relocatable
1937 && notesec
->output_section
!= bfd_abs_section_ptr
)
1938 notesec
->output_section
->flags
|= SEC_CODE
;
1942 /* Any syms created from now on start with -1 in
1943 got.refcount/offset and plt.refcount/offset. */
1944 elf_hash_table (info
)->init_refcount
= elf_hash_table (info
)->init_offset
;
1946 /* The backend may have to create some sections regardless of whether
1947 we're dynamic or not. */
1948 bed
= get_elf_backend_data (output_bfd
);
1949 if (bed
->elf_backend_always_size_sections
1950 && ! (*bed
->elf_backend_always_size_sections
) (output_bfd
, info
))
1953 dynobj
= elf_hash_table (info
)->dynobj
;
1955 /* If there were no dynamic objects in the link, there is nothing to
1960 if (! _bfd_elf_maybe_strip_eh_frame_hdr (info
))
1963 if (elf_hash_table (info
)->dynamic_sections_created
)
1965 struct elf_info_failed eif
;
1966 struct elf_link_hash_entry
*h
;
1968 struct bfd_elf_version_tree
*t
;
1969 struct bfd_elf_version_expr
*d
;
1970 bfd_boolean all_defined
;
1972 *sinterpptr
= bfd_get_section_by_name (dynobj
, ".interp");
1973 BFD_ASSERT (*sinterpptr
!= NULL
|| info
->shared
);
1977 soname_indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
1979 if (soname_indx
== (bfd_size_type
) -1
1980 || ! elf_add_dynamic_entry (info
, DT_SONAME
, soname_indx
))
1986 if (! elf_add_dynamic_entry (info
, DT_SYMBOLIC
, 0))
1988 info
->flags
|= DF_SYMBOLIC
;
1995 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
, rpath
,
1997 if (info
->new_dtags
)
1998 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
, indx
);
1999 if (indx
== (bfd_size_type
) -1
2000 || ! elf_add_dynamic_entry (info
, DT_RPATH
, indx
)
2002 && ! elf_add_dynamic_entry (info
, DT_RUNPATH
, indx
)))
2006 if (filter_shlib
!= NULL
)
2010 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
2011 filter_shlib
, TRUE
);
2012 if (indx
== (bfd_size_type
) -1
2013 || ! elf_add_dynamic_entry (info
, DT_FILTER
, indx
))
2017 if (auxiliary_filters
!= NULL
)
2019 const char * const *p
;
2021 for (p
= auxiliary_filters
; *p
!= NULL
; p
++)
2025 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
2027 if (indx
== (bfd_size_type
) -1
2028 || ! elf_add_dynamic_entry (info
, DT_AUXILIARY
, indx
))
2034 eif
.verdefs
= verdefs
;
2037 /* If we are supposed to export all symbols into the dynamic symbol
2038 table (this is not the normal case), then do so. */
2039 if (info
->export_dynamic
)
2041 elf_link_hash_traverse (elf_hash_table (info
),
2042 _bfd_elf_export_symbol
,
2048 /* Make all global versions with definiton. */
2049 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
2050 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
2051 if (!d
->symver
&& strchr (d
->pattern
, '*') == NULL
)
2053 const char *verstr
, *name
;
2054 size_t namelen
, verlen
, newlen
;
2056 struct elf_link_hash_entry
*newh
;
2059 namelen
= strlen (name
);
2061 verlen
= strlen (verstr
);
2062 newlen
= namelen
+ verlen
+ 3;
2064 newname
= bfd_malloc (newlen
);
2065 if (newname
== NULL
)
2067 memcpy (newname
, name
, namelen
);
2069 /* Check the hidden versioned definition. */
2070 p
= newname
+ namelen
;
2072 memcpy (p
, verstr
, verlen
+ 1);
2073 newh
= elf_link_hash_lookup (elf_hash_table (info
),
2074 newname
, FALSE
, FALSE
,
2077 || (newh
->root
.type
!= bfd_link_hash_defined
2078 && newh
->root
.type
!= bfd_link_hash_defweak
))
2080 /* Check the default versioned definition. */
2082 memcpy (p
, verstr
, verlen
+ 1);
2083 newh
= elf_link_hash_lookup (elf_hash_table (info
),
2084 newname
, FALSE
, FALSE
,
2089 /* Mark this version if there is a definition and it is
2090 not defined in a shared object. */
2092 && ((newh
->elf_link_hash_flags
2093 & ELF_LINK_HASH_DEF_DYNAMIC
) == 0)
2094 && (newh
->root
.type
== bfd_link_hash_defined
2095 || newh
->root
.type
== bfd_link_hash_defweak
))
2099 /* Attach all the symbols to their version information. */
2100 asvinfo
.output_bfd
= output_bfd
;
2101 asvinfo
.info
= info
;
2102 asvinfo
.verdefs
= verdefs
;
2103 asvinfo
.failed
= FALSE
;
2105 elf_link_hash_traverse (elf_hash_table (info
),
2106 _bfd_elf_link_assign_sym_version
,
2111 if (!info
->allow_undefined_version
)
2113 /* Check if all global versions have a definiton. */
2115 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
2116 for (d
= t
->globals
; d
!= NULL
; d
= d
->next
)
2117 if (!d
->symver
&& !d
->script
2118 && strchr (d
->pattern
, '*') == NULL
)
2120 (*_bfd_error_handler
)
2121 (_("%s: undefined version: %s"),
2122 d
->pattern
, t
->name
);
2123 all_defined
= FALSE
;
2128 bfd_set_error (bfd_error_bad_value
);
2133 /* Find all symbols which were defined in a dynamic object and make
2134 the backend pick a reasonable value for them. */
2135 elf_link_hash_traverse (elf_hash_table (info
),
2136 _bfd_elf_adjust_dynamic_symbol
,
2141 /* Add some entries to the .dynamic section. We fill in some of the
2142 values later, in elf_bfd_final_link, but we must add the entries
2143 now so that we know the final size of the .dynamic section. */
2145 /* If there are initialization and/or finalization functions to
2146 call then add the corresponding DT_INIT/DT_FINI entries. */
2147 h
= (info
->init_function
2148 ? elf_link_hash_lookup (elf_hash_table (info
),
2149 info
->init_function
, FALSE
,
2153 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
2154 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
2156 if (! elf_add_dynamic_entry (info
, DT_INIT
, 0))
2159 h
= (info
->fini_function
2160 ? elf_link_hash_lookup (elf_hash_table (info
),
2161 info
->fini_function
, FALSE
,
2165 && (h
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_REGULAR
2166 | ELF_LINK_HASH_DEF_REGULAR
)) != 0)
2168 if (! elf_add_dynamic_entry (info
, DT_FINI
, 0))
2172 if (bfd_get_section_by_name (output_bfd
, ".preinit_array") != NULL
)
2174 /* DT_PREINIT_ARRAY is not allowed in shared library. */
2175 if (! info
->executable
)
2180 for (sub
= info
->input_bfds
; sub
!= NULL
;
2181 sub
= sub
->link_next
)
2182 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
2183 if (elf_section_data (o
)->this_hdr
.sh_type
2184 == SHT_PREINIT_ARRAY
)
2186 (*_bfd_error_handler
)
2187 (_("%s: .preinit_array section is not allowed in DSO"),
2188 bfd_archive_filename (sub
));
2192 bfd_set_error (bfd_error_nonrepresentable_section
);
2196 if (!elf_add_dynamic_entry (info
, DT_PREINIT_ARRAY
, 0)
2197 || !elf_add_dynamic_entry (info
, DT_PREINIT_ARRAYSZ
, 0))
2200 if (bfd_get_section_by_name (output_bfd
, ".init_array") != NULL
)
2202 if (!elf_add_dynamic_entry (info
, DT_INIT_ARRAY
, 0)
2203 || !elf_add_dynamic_entry (info
, DT_INIT_ARRAYSZ
, 0))
2206 if (bfd_get_section_by_name (output_bfd
, ".fini_array") != NULL
)
2208 if (!elf_add_dynamic_entry (info
, DT_FINI_ARRAY
, 0)
2209 || !elf_add_dynamic_entry (info
, DT_FINI_ARRAYSZ
, 0))
2213 dynstr
= bfd_get_section_by_name (dynobj
, ".dynstr");
2214 /* If .dynstr is excluded from the link, we don't want any of
2215 these tags. Strictly, we should be checking each section
2216 individually; This quick check covers for the case where
2217 someone does a /DISCARD/ : { *(*) }. */
2218 if (dynstr
!= NULL
&& dynstr
->output_section
!= bfd_abs_section_ptr
)
2220 bfd_size_type strsize
;
2222 strsize
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
2223 if (! elf_add_dynamic_entry (info
, DT_HASH
, 0)
2224 || ! elf_add_dynamic_entry (info
, DT_STRTAB
, 0)
2225 || ! elf_add_dynamic_entry (info
, DT_SYMTAB
, 0)
2226 || ! elf_add_dynamic_entry (info
, DT_STRSZ
, strsize
)
2227 || ! elf_add_dynamic_entry (info
, DT_SYMENT
,
2228 sizeof (Elf_External_Sym
)))
2233 /* The backend must work out the sizes of all the other dynamic
2235 if (bed
->elf_backend_size_dynamic_sections
2236 && ! (*bed
->elf_backend_size_dynamic_sections
) (output_bfd
, info
))
2239 if (elf_hash_table (info
)->dynamic_sections_created
)
2241 bfd_size_type dynsymcount
;
2243 size_t bucketcount
= 0;
2244 size_t hash_entry_size
;
2245 unsigned int dtagcount
;
2247 /* Set up the version definition section. */
2248 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
2249 BFD_ASSERT (s
!= NULL
);
2251 /* We may have created additional version definitions if we are
2252 just linking a regular application. */
2253 verdefs
= asvinfo
.verdefs
;
2255 /* Skip anonymous version tag. */
2256 if (verdefs
!= NULL
&& verdefs
->vernum
== 0)
2257 verdefs
= verdefs
->next
;
2259 if (verdefs
== NULL
)
2260 _bfd_strip_section_from_output (info
, s
);
2265 struct bfd_elf_version_tree
*t
;
2267 Elf_Internal_Verdef def
;
2268 Elf_Internal_Verdaux defaux
;
2273 /* Make space for the base version. */
2274 size
+= sizeof (Elf_External_Verdef
);
2275 size
+= sizeof (Elf_External_Verdaux
);
2278 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
2280 struct bfd_elf_version_deps
*n
;
2282 size
+= sizeof (Elf_External_Verdef
);
2283 size
+= sizeof (Elf_External_Verdaux
);
2286 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
2287 size
+= sizeof (Elf_External_Verdaux
);
2290 s
->_raw_size
= size
;
2291 s
->contents
= bfd_alloc (output_bfd
, s
->_raw_size
);
2292 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2295 /* Fill in the version definition section. */
2299 def
.vd_version
= VER_DEF_CURRENT
;
2300 def
.vd_flags
= VER_FLG_BASE
;
2303 def
.vd_aux
= sizeof (Elf_External_Verdef
);
2304 def
.vd_next
= (sizeof (Elf_External_Verdef
)
2305 + sizeof (Elf_External_Verdaux
));
2307 if (soname_indx
!= (bfd_size_type
) -1)
2309 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
2311 def
.vd_hash
= bfd_elf_hash (soname
);
2312 defaux
.vda_name
= soname_indx
;
2319 name
= basename (output_bfd
->filename
);
2320 def
.vd_hash
= bfd_elf_hash (name
);
2321 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
2323 if (indx
== (bfd_size_type
) -1)
2325 defaux
.vda_name
= indx
;
2327 defaux
.vda_next
= 0;
2329 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
2330 (Elf_External_Verdef
*) p
);
2331 p
+= sizeof (Elf_External_Verdef
);
2332 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
2333 (Elf_External_Verdaux
*) p
);
2334 p
+= sizeof (Elf_External_Verdaux
);
2336 for (t
= verdefs
; t
!= NULL
; t
= t
->next
)
2339 struct bfd_elf_version_deps
*n
;
2340 struct elf_link_hash_entry
*h
;
2341 struct bfd_link_hash_entry
*bh
;
2344 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
2347 /* Add a symbol representing this version. */
2349 if (! (_bfd_generic_link_add_one_symbol
2350 (info
, dynobj
, t
->name
, BSF_GLOBAL
, bfd_abs_section_ptr
,
2352 get_elf_backend_data (dynobj
)->collect
, &bh
)))
2354 h
= (struct elf_link_hash_entry
*) bh
;
2355 h
->elf_link_hash_flags
&= ~ ELF_LINK_NON_ELF
;
2356 h
->elf_link_hash_flags
|= ELF_LINK_HASH_DEF_REGULAR
;
2357 h
->type
= STT_OBJECT
;
2358 h
->verinfo
.vertree
= t
;
2360 if (! _bfd_elf_link_record_dynamic_symbol (info
, h
))
2363 def
.vd_version
= VER_DEF_CURRENT
;
2365 if (t
->globals
== NULL
&& t
->locals
== NULL
&& ! t
->used
)
2366 def
.vd_flags
|= VER_FLG_WEAK
;
2367 def
.vd_ndx
= t
->vernum
+ 1;
2368 def
.vd_cnt
= cdeps
+ 1;
2369 def
.vd_hash
= bfd_elf_hash (t
->name
);
2370 def
.vd_aux
= sizeof (Elf_External_Verdef
);
2371 if (t
->next
!= NULL
)
2372 def
.vd_next
= (sizeof (Elf_External_Verdef
)
2373 + (cdeps
+ 1) * sizeof (Elf_External_Verdaux
));
2377 _bfd_elf_swap_verdef_out (output_bfd
, &def
,
2378 (Elf_External_Verdef
*) p
);
2379 p
+= sizeof (Elf_External_Verdef
);
2381 defaux
.vda_name
= h
->dynstr_index
;
2382 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
2384 if (t
->deps
== NULL
)
2385 defaux
.vda_next
= 0;
2387 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
2388 t
->name_indx
= defaux
.vda_name
;
2390 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
2391 (Elf_External_Verdaux
*) p
);
2392 p
+= sizeof (Elf_External_Verdaux
);
2394 for (n
= t
->deps
; n
!= NULL
; n
= n
->next
)
2396 if (n
->version_needed
== NULL
)
2398 /* This can happen if there was an error in the
2400 defaux
.vda_name
= 0;
2404 defaux
.vda_name
= n
->version_needed
->name_indx
;
2405 _bfd_elf_strtab_addref (elf_hash_table (info
)->dynstr
,
2408 if (n
->next
== NULL
)
2409 defaux
.vda_next
= 0;
2411 defaux
.vda_next
= sizeof (Elf_External_Verdaux
);
2413 _bfd_elf_swap_verdaux_out (output_bfd
, &defaux
,
2414 (Elf_External_Verdaux
*) p
);
2415 p
+= sizeof (Elf_External_Verdaux
);
2419 if (! elf_add_dynamic_entry (info
, DT_VERDEF
, 0)
2420 || ! elf_add_dynamic_entry (info
, DT_VERDEFNUM
, cdefs
))
2423 elf_tdata (output_bfd
)->cverdefs
= cdefs
;
2426 if ((info
->new_dtags
&& info
->flags
) || (info
->flags
& DF_STATIC_TLS
))
2428 if (! elf_add_dynamic_entry (info
, DT_FLAGS
, info
->flags
))
2434 if (info
->executable
)
2435 info
->flags_1
&= ~ (DF_1_INITFIRST
2438 if (! elf_add_dynamic_entry (info
, DT_FLAGS_1
, info
->flags_1
))
2442 /* Work out the size of the version reference section. */
2444 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
2445 BFD_ASSERT (s
!= NULL
);
2447 struct elf_find_verdep_info sinfo
;
2449 sinfo
.output_bfd
= output_bfd
;
2451 sinfo
.vers
= elf_tdata (output_bfd
)->cverdefs
;
2452 if (sinfo
.vers
== 0)
2454 sinfo
.failed
= FALSE
;
2456 elf_link_hash_traverse (elf_hash_table (info
),
2457 _bfd_elf_link_find_version_dependencies
,
2460 if (elf_tdata (output_bfd
)->verref
== NULL
)
2461 _bfd_strip_section_from_output (info
, s
);
2464 Elf_Internal_Verneed
*t
;
2469 /* Build the version definition section. */
2472 for (t
= elf_tdata (output_bfd
)->verref
;
2476 Elf_Internal_Vernaux
*a
;
2478 size
+= sizeof (Elf_External_Verneed
);
2480 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2481 size
+= sizeof (Elf_External_Vernaux
);
2484 s
->_raw_size
= size
;
2485 s
->contents
= bfd_alloc (output_bfd
, s
->_raw_size
);
2486 if (s
->contents
== NULL
)
2490 for (t
= elf_tdata (output_bfd
)->verref
;
2495 Elf_Internal_Vernaux
*a
;
2499 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2502 t
->vn_version
= VER_NEED_CURRENT
;
2504 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
2505 elf_dt_name (t
->vn_bfd
) != NULL
2506 ? elf_dt_name (t
->vn_bfd
)
2507 : basename (t
->vn_bfd
->filename
),
2509 if (indx
== (bfd_size_type
) -1)
2512 t
->vn_aux
= sizeof (Elf_External_Verneed
);
2513 if (t
->vn_nextref
== NULL
)
2516 t
->vn_next
= (sizeof (Elf_External_Verneed
)
2517 + caux
* sizeof (Elf_External_Vernaux
));
2519 _bfd_elf_swap_verneed_out (output_bfd
, t
,
2520 (Elf_External_Verneed
*) p
);
2521 p
+= sizeof (Elf_External_Verneed
);
2523 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
2525 a
->vna_hash
= bfd_elf_hash (a
->vna_nodename
);
2526 indx
= _bfd_elf_strtab_add (elf_hash_table (info
)->dynstr
,
2527 a
->vna_nodename
, FALSE
);
2528 if (indx
== (bfd_size_type
) -1)
2531 if (a
->vna_nextptr
== NULL
)
2534 a
->vna_next
= sizeof (Elf_External_Vernaux
);
2536 _bfd_elf_swap_vernaux_out (output_bfd
, a
,
2537 (Elf_External_Vernaux
*) p
);
2538 p
+= sizeof (Elf_External_Vernaux
);
2542 if (! elf_add_dynamic_entry (info
, DT_VERNEED
, 0)
2543 || ! elf_add_dynamic_entry (info
, DT_VERNEEDNUM
, crefs
))
2546 elf_tdata (output_bfd
)->cverrefs
= crefs
;
2550 /* Assign dynsym indicies. In a shared library we generate a
2551 section symbol for each output section, which come first.
2552 Next come all of the back-end allocated local dynamic syms,
2553 followed by the rest of the global symbols. */
2555 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
2557 /* Work out the size of the symbol version section. */
2558 s
= bfd_get_section_by_name (dynobj
, ".gnu.version");
2559 BFD_ASSERT (s
!= NULL
);
2560 if (dynsymcount
== 0
2561 || (verdefs
== NULL
&& elf_tdata (output_bfd
)->verref
== NULL
))
2563 _bfd_strip_section_from_output (info
, s
);
2564 /* The DYNSYMCOUNT might have changed if we were going to
2565 output a dynamic symbol table entry for S. */
2566 dynsymcount
= _bfd_elf_link_renumber_dynsyms (output_bfd
, info
);
2570 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Versym
);
2571 s
->contents
= bfd_zalloc (output_bfd
, s
->_raw_size
);
2572 if (s
->contents
== NULL
)
2575 if (! elf_add_dynamic_entry (info
, DT_VERSYM
, 0))
2579 /* Set the size of the .dynsym and .hash sections. We counted
2580 the number of dynamic symbols in elf_link_add_object_symbols.
2581 We will build the contents of .dynsym and .hash when we build
2582 the final symbol table, because until then we do not know the
2583 correct value to give the symbols. We built the .dynstr
2584 section as we went along in elf_link_add_object_symbols. */
2585 s
= bfd_get_section_by_name (dynobj
, ".dynsym");
2586 BFD_ASSERT (s
!= NULL
);
2587 s
->_raw_size
= dynsymcount
* sizeof (Elf_External_Sym
);
2588 s
->contents
= bfd_alloc (output_bfd
, s
->_raw_size
);
2589 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
2592 if (dynsymcount
!= 0)
2594 Elf_Internal_Sym isym
;
2596 /* The first entry in .dynsym is a dummy symbol. */
2603 elf_swap_symbol_out (output_bfd
, &isym
, s
->contents
, 0);
2606 /* Compute the size of the hashing table. As a side effect this
2607 computes the hash values for all the names we export. */
2608 bucketcount
= compute_bucket_count (info
);
2610 s
= bfd_get_section_by_name (dynobj
, ".hash");
2611 BFD_ASSERT (s
!= NULL
);
2612 hash_entry_size
= elf_section_data (s
)->this_hdr
.sh_entsize
;
2613 s
->_raw_size
= ((2 + bucketcount
+ dynsymcount
) * hash_entry_size
);
2614 s
->contents
= bfd_zalloc (output_bfd
, s
->_raw_size
);
2615 if (s
->contents
== NULL
)
2618 bfd_put (8 * hash_entry_size
, output_bfd
, bucketcount
, s
->contents
);
2619 bfd_put (8 * hash_entry_size
, output_bfd
, dynsymcount
,
2620 s
->contents
+ hash_entry_size
);
2622 elf_hash_table (info
)->bucketcount
= bucketcount
;
2624 s
= bfd_get_section_by_name (dynobj
, ".dynstr");
2625 BFD_ASSERT (s
!= NULL
);
2627 elf_finalize_dynstr (output_bfd
, info
);
2629 s
->_raw_size
= _bfd_elf_strtab_size (elf_hash_table (info
)->dynstr
);
2631 for (dtagcount
= 0; dtagcount
<= info
->spare_dynamic_tags
; ++dtagcount
)
2632 if (! elf_add_dynamic_entry (info
, DT_NULL
, 0))
2639 /* This function is used to adjust offsets into .dynstr for
2640 dynamic symbols. This is called via elf_link_hash_traverse. */
2643 elf_adjust_dynstr_offsets (struct elf_link_hash_entry
*h
, void *data
)
2645 struct elf_strtab_hash
*dynstr
= data
;
2647 if (h
->root
.type
== bfd_link_hash_warning
)
2648 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2650 if (h
->dynindx
!= -1)
2651 h
->dynstr_index
= _bfd_elf_strtab_offset (dynstr
, h
->dynstr_index
);
2655 /* Assign string offsets in .dynstr, update all structures referencing
2659 elf_finalize_dynstr (bfd
*output_bfd
, struct bfd_link_info
*info
)
2661 struct elf_link_local_dynamic_entry
*entry
;
2662 struct elf_strtab_hash
*dynstr
= elf_hash_table (info
)->dynstr
;
2663 bfd
*dynobj
= elf_hash_table (info
)->dynobj
;
2666 Elf_External_Dyn
*dyncon
, *dynconend
;
2668 _bfd_elf_strtab_finalize (dynstr
);
2669 size
= _bfd_elf_strtab_size (dynstr
);
2671 /* Update all .dynamic entries referencing .dynstr strings. */
2672 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2673 BFD_ASSERT (sdyn
!= NULL
);
2675 dyncon
= (Elf_External_Dyn
*) sdyn
->contents
;
2676 dynconend
= (Elf_External_Dyn
*) (sdyn
->contents
+
2678 for (; dyncon
< dynconend
; dyncon
++)
2680 Elf_Internal_Dyn dyn
;
2682 elf_swap_dyn_in (dynobj
, dyncon
, & dyn
);
2686 dyn
.d_un
.d_val
= size
;
2687 elf_swap_dyn_out (dynobj
, & dyn
, dyncon
);
2695 dyn
.d_un
.d_val
= _bfd_elf_strtab_offset (dynstr
, dyn
.d_un
.d_val
);
2696 elf_swap_dyn_out (dynobj
, & dyn
, dyncon
);
2703 /* Now update local dynamic symbols. */
2704 for (entry
= elf_hash_table (info
)->dynlocal
; entry
; entry
= entry
->next
)
2705 entry
->isym
.st_name
= _bfd_elf_strtab_offset (dynstr
,
2706 entry
->isym
.st_name
);
2708 /* And the rest of dynamic symbols. */
2709 elf_link_hash_traverse (elf_hash_table (info
),
2710 elf_adjust_dynstr_offsets
, dynstr
);
2712 /* Adjust version definitions. */
2713 if (elf_tdata (output_bfd
)->cverdefs
)
2718 Elf_Internal_Verdef def
;
2719 Elf_Internal_Verdaux defaux
;
2721 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_d");
2722 p
= (bfd_byte
*) s
->contents
;
2725 _bfd_elf_swap_verdef_in (output_bfd
, (Elf_External_Verdef
*) p
,
2727 p
+= sizeof (Elf_External_Verdef
);
2728 for (i
= 0; i
< def
.vd_cnt
; ++i
)
2730 _bfd_elf_swap_verdaux_in (output_bfd
,
2731 (Elf_External_Verdaux
*) p
, &defaux
);
2732 defaux
.vda_name
= _bfd_elf_strtab_offset (dynstr
,
2734 _bfd_elf_swap_verdaux_out (output_bfd
,
2735 &defaux
, (Elf_External_Verdaux
*) p
);
2736 p
+= sizeof (Elf_External_Verdaux
);
2739 while (def
.vd_next
);
2742 /* Adjust version references. */
2743 if (elf_tdata (output_bfd
)->verref
)
2748 Elf_Internal_Verneed need
;
2749 Elf_Internal_Vernaux needaux
;
2751 s
= bfd_get_section_by_name (dynobj
, ".gnu.version_r");
2752 p
= (bfd_byte
*) s
->contents
;
2755 _bfd_elf_swap_verneed_in (output_bfd
, (Elf_External_Verneed
*) p
,
2757 need
.vn_file
= _bfd_elf_strtab_offset (dynstr
, need
.vn_file
);
2758 _bfd_elf_swap_verneed_out (output_bfd
, &need
,
2759 (Elf_External_Verneed
*) p
);
2760 p
+= sizeof (Elf_External_Verneed
);
2761 for (i
= 0; i
< need
.vn_cnt
; ++i
)
2763 _bfd_elf_swap_vernaux_in (output_bfd
,
2764 (Elf_External_Vernaux
*) p
, &needaux
);
2765 needaux
.vna_name
= _bfd_elf_strtab_offset (dynstr
,
2767 _bfd_elf_swap_vernaux_out (output_bfd
,
2769 (Elf_External_Vernaux
*) p
);
2770 p
+= sizeof (Elf_External_Vernaux
);
2773 while (need
.vn_next
);
2779 /* Final phase of ELF linker. */
2781 /* A structure we use to avoid passing large numbers of arguments. */
2783 struct elf_final_link_info
2785 /* General link information. */
2786 struct bfd_link_info
*info
;
2789 /* Symbol string table. */
2790 struct bfd_strtab_hash
*symstrtab
;
2791 /* .dynsym section. */
2792 asection
*dynsym_sec
;
2793 /* .hash section. */
2795 /* symbol version section (.gnu.version). */
2796 asection
*symver_sec
;
2797 /* first SHF_TLS section (if any). */
2798 asection
*first_tls_sec
;
2799 /* Buffer large enough to hold contents of any section. */
2801 /* Buffer large enough to hold external relocs of any section. */
2802 void *external_relocs
;
2803 /* Buffer large enough to hold internal relocs of any section. */
2804 Elf_Internal_Rela
*internal_relocs
;
2805 /* Buffer large enough to hold external local symbols of any input
2807 Elf_External_Sym
*external_syms
;
2808 /* And a buffer for symbol section indices. */
2809 Elf_External_Sym_Shndx
*locsym_shndx
;
2810 /* Buffer large enough to hold internal local symbols of any input
2812 Elf_Internal_Sym
*internal_syms
;
2813 /* Array large enough to hold a symbol index for each local symbol
2814 of any input BFD. */
2816 /* Array large enough to hold a section pointer for each local
2817 symbol of any input BFD. */
2818 asection
**sections
;
2819 /* Buffer to hold swapped out symbols. */
2820 Elf_External_Sym
*symbuf
;
2821 /* And one for symbol section indices. */
2822 Elf_External_Sym_Shndx
*symshndxbuf
;
2823 /* Number of swapped out symbols in buffer. */
2824 size_t symbuf_count
;
2825 /* Number of symbols which fit in symbuf. */
2827 /* And same for symshndxbuf. */
2828 size_t shndxbuf_size
;
2831 static bfd_boolean elf_link_output_sym
2832 (struct elf_final_link_info
*, const char *, Elf_Internal_Sym
*, asection
*);
2833 static bfd_boolean elf_link_flush_output_syms
2834 (struct elf_final_link_info
*);
2835 static bfd_boolean elf_link_output_extsym
2836 (struct elf_link_hash_entry
*, void *);
2837 static bfd_boolean elf_link_input_bfd
2838 (struct elf_final_link_info
*, bfd
*);
2839 static bfd_boolean elf_reloc_link_order
2840 (bfd
*, struct bfd_link_info
*, asection
*, struct bfd_link_order
*);
2842 /* This struct is used to pass information to elf_link_output_extsym. */
2844 struct elf_outext_info
2847 bfd_boolean localsyms
;
2848 struct elf_final_link_info
*finfo
;
2851 /* When performing a relocatable link, the input relocations are
2852 preserved. But, if they reference global symbols, the indices
2853 referenced must be updated. Update all the relocations in
2854 REL_HDR (there are COUNT of them), using the data in REL_HASH. */
2857 elf_link_adjust_relocs (bfd
*abfd
,
2858 Elf_Internal_Shdr
*rel_hdr
,
2860 struct elf_link_hash_entry
**rel_hash
)
2863 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2865 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2866 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2868 if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rel
))
2870 swap_in
= bed
->s
->swap_reloc_in
;
2871 swap_out
= bed
->s
->swap_reloc_out
;
2873 else if (rel_hdr
->sh_entsize
== sizeof (Elf_External_Rela
))
2875 swap_in
= bed
->s
->swap_reloca_in
;
2876 swap_out
= bed
->s
->swap_reloca_out
;
2881 if (bed
->s
->int_rels_per_ext_rel
> MAX_INT_RELS_PER_EXT_REL
)
2884 erela
= rel_hdr
->contents
;
2885 for (i
= 0; i
< count
; i
++, rel_hash
++, erela
+= rel_hdr
->sh_entsize
)
2887 Elf_Internal_Rela irela
[MAX_INT_RELS_PER_EXT_REL
];
2890 if (*rel_hash
== NULL
)
2893 BFD_ASSERT ((*rel_hash
)->indx
>= 0);
2895 (*swap_in
) (abfd
, erela
, irela
);
2896 for (j
= 0; j
< bed
->s
->int_rels_per_ext_rel
; j
++)
2897 irela
[j
].r_info
= ELF_R_INFO ((*rel_hash
)->indx
,
2898 ELF_R_TYPE (irela
[j
].r_info
));
2899 (*swap_out
) (abfd
, irela
, erela
);
2903 struct elf_link_sort_rela
2906 enum elf_reloc_type_class type
;
2907 /* We use this as an array of size int_rels_per_ext_rel. */
2908 Elf_Internal_Rela rela
[1];
2912 elf_link_sort_cmp1 (const void *A
, const void *B
)
2914 const struct elf_link_sort_rela
*a
= A
;
2915 const struct elf_link_sort_rela
*b
= B
;
2916 int relativea
, relativeb
;
2918 relativea
= a
->type
== reloc_class_relative
;
2919 relativeb
= b
->type
== reloc_class_relative
;
2921 if (relativea
< relativeb
)
2923 if (relativea
> relativeb
)
2925 if (ELF_R_SYM (a
->rela
->r_info
) < ELF_R_SYM (b
->rela
->r_info
))
2927 if (ELF_R_SYM (a
->rela
->r_info
) > ELF_R_SYM (b
->rela
->r_info
))
2929 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
2931 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
2937 elf_link_sort_cmp2 (const void *A
, const void *B
)
2939 const struct elf_link_sort_rela
*a
= A
;
2940 const struct elf_link_sort_rela
*b
= B
;
2943 if (a
->offset
< b
->offset
)
2945 if (a
->offset
> b
->offset
)
2947 copya
= (a
->type
== reloc_class_copy
) * 2 + (a
->type
== reloc_class_plt
);
2948 copyb
= (b
->type
== reloc_class_copy
) * 2 + (b
->type
== reloc_class_plt
);
2953 if (a
->rela
->r_offset
< b
->rela
->r_offset
)
2955 if (a
->rela
->r_offset
> b
->rela
->r_offset
)
2961 elf_link_sort_relocs (bfd
*abfd
, struct bfd_link_info
*info
, asection
**psec
)
2964 bfd_size_type count
, size
;
2965 size_t i
, ret
, sort_elt
, ext_size
;
2966 bfd_byte
*sort
, *s_non_relative
, *p
;
2967 struct elf_link_sort_rela
*sq
;
2968 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2969 int i2e
= bed
->s
->int_rels_per_ext_rel
;
2970 void (*swap_in
) (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2971 void (*swap_out
) (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2972 struct bfd_link_order
*lo
;
2974 reldyn
= bfd_get_section_by_name (abfd
, ".rela.dyn");
2975 if (reldyn
== NULL
|| reldyn
->_raw_size
== 0)
2977 reldyn
= bfd_get_section_by_name (abfd
, ".rel.dyn");
2978 if (reldyn
== NULL
|| reldyn
->_raw_size
== 0)
2980 ext_size
= sizeof (Elf_External_Rel
);
2981 swap_in
= bed
->s
->swap_reloc_in
;
2982 swap_out
= bed
->s
->swap_reloc_out
;
2986 ext_size
= sizeof (Elf_External_Rela
);
2987 swap_in
= bed
->s
->swap_reloca_in
;
2988 swap_out
= bed
->s
->swap_reloca_out
;
2990 count
= reldyn
->_raw_size
/ ext_size
;
2993 for (lo
= reldyn
->link_order_head
; lo
!= NULL
; lo
= lo
->next
)
2994 if (lo
->type
== bfd_indirect_link_order
)
2996 asection
*o
= lo
->u
.indirect
.section
;
2997 size
+= o
->_raw_size
;
3000 if (size
!= reldyn
->_raw_size
)
3003 sort_elt
= (sizeof (struct elf_link_sort_rela
)
3004 + (i2e
- 1) * sizeof (Elf_Internal_Rela
));
3005 sort
= bfd_zmalloc (sort_elt
* count
);
3008 (*info
->callbacks
->warning
)
3009 (info
, _("Not enough memory to sort relocations"), 0, abfd
, 0, 0);
3013 for (lo
= reldyn
->link_order_head
; lo
!= NULL
; lo
= lo
->next
)
3014 if (lo
->type
== bfd_indirect_link_order
)
3016 bfd_byte
*erel
, *erelend
;
3017 asection
*o
= lo
->u
.indirect
.section
;
3020 erelend
= o
->contents
+ o
->_raw_size
;
3021 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
3022 while (erel
< erelend
)
3024 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
3025 (*swap_in
) (abfd
, erel
, s
->rela
);
3026 s
->type
= (*bed
->elf_backend_reloc_type_class
) (s
->rela
);
3032 qsort (sort
, count
, sort_elt
, elf_link_sort_cmp1
);
3034 for (i
= 0, p
= sort
; i
< count
; i
++, p
+= sort_elt
)
3036 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
3037 if (s
->type
!= reloc_class_relative
)
3043 sq
= (struct elf_link_sort_rela
*) s_non_relative
;
3044 for (; i
< count
; i
++, p
+= sort_elt
)
3046 struct elf_link_sort_rela
*sp
= (struct elf_link_sort_rela
*) p
;
3047 if (ELF_R_SYM (sp
->rela
->r_info
) != ELF_R_SYM (sq
->rela
->r_info
))
3049 sp
->offset
= sq
->rela
->r_offset
;
3052 qsort (s_non_relative
, count
- ret
, sort_elt
, elf_link_sort_cmp2
);
3054 for (lo
= reldyn
->link_order_head
; lo
!= NULL
; lo
= lo
->next
)
3055 if (lo
->type
== bfd_indirect_link_order
)
3057 bfd_byte
*erel
, *erelend
;
3058 asection
*o
= lo
->u
.indirect
.section
;
3061 erelend
= o
->contents
+ o
->_raw_size
;
3062 p
= sort
+ o
->output_offset
/ ext_size
* sort_elt
;
3063 while (erel
< erelend
)
3065 struct elf_link_sort_rela
*s
= (struct elf_link_sort_rela
*) p
;
3066 (*swap_out
) (abfd
, s
->rela
, erel
);
3077 /* Do the final step of an ELF link. */
3080 elf_bfd_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
3082 bfd_boolean dynamic
;
3083 bfd_boolean emit_relocs
;
3085 struct elf_final_link_info finfo
;
3086 register asection
*o
;
3087 register struct bfd_link_order
*p
;
3089 bfd_size_type max_contents_size
;
3090 bfd_size_type max_external_reloc_size
;
3091 bfd_size_type max_internal_reloc_count
;
3092 bfd_size_type max_sym_count
;
3093 bfd_size_type max_sym_shndx_count
;
3095 Elf_Internal_Sym elfsym
;
3097 Elf_Internal_Shdr
*symtab_hdr
;
3098 Elf_Internal_Shdr
*symtab_shndx_hdr
;
3099 Elf_Internal_Shdr
*symstrtab_hdr
;
3100 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3101 struct elf_outext_info eoinfo
;
3103 size_t relativecount
= 0;
3104 asection
*reldyn
= 0;
3107 if (! is_elf_hash_table (info
))
3111 abfd
->flags
|= DYNAMIC
;
3113 dynamic
= elf_hash_table (info
)->dynamic_sections_created
;
3114 dynobj
= elf_hash_table (info
)->dynobj
;
3116 emit_relocs
= (info
->relocatable
3117 || info
->emitrelocations
3118 || bed
->elf_backend_emit_relocs
);
3121 finfo
.output_bfd
= abfd
;
3122 finfo
.symstrtab
= elf_stringtab_init ();
3123 if (finfo
.symstrtab
== NULL
)
3128 finfo
.dynsym_sec
= NULL
;
3129 finfo
.hash_sec
= NULL
;
3130 finfo
.symver_sec
= NULL
;
3134 finfo
.dynsym_sec
= bfd_get_section_by_name (dynobj
, ".dynsym");
3135 finfo
.hash_sec
= bfd_get_section_by_name (dynobj
, ".hash");
3136 BFD_ASSERT (finfo
.dynsym_sec
!= NULL
&& finfo
.hash_sec
!= NULL
);
3137 finfo
.symver_sec
= bfd_get_section_by_name (dynobj
, ".gnu.version");
3138 /* Note that it is OK if symver_sec is NULL. */
3141 finfo
.contents
= NULL
;
3142 finfo
.external_relocs
= NULL
;
3143 finfo
.internal_relocs
= NULL
;
3144 finfo
.external_syms
= NULL
;
3145 finfo
.locsym_shndx
= NULL
;
3146 finfo
.internal_syms
= NULL
;
3147 finfo
.indices
= NULL
;
3148 finfo
.sections
= NULL
;
3149 finfo
.symbuf
= NULL
;
3150 finfo
.symshndxbuf
= NULL
;
3151 finfo
.symbuf_count
= 0;
3152 finfo
.shndxbuf_size
= 0;
3153 finfo
.first_tls_sec
= NULL
;
3154 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3155 if ((o
->flags
& SEC_THREAD_LOCAL
) != 0
3156 && (o
->flags
& SEC_LOAD
) != 0)
3158 finfo
.first_tls_sec
= o
;
3162 /* Count up the number of relocations we will output for each output
3163 section, so that we know the sizes of the reloc sections. We
3164 also figure out some maximum sizes. */
3165 max_contents_size
= 0;
3166 max_external_reloc_size
= 0;
3167 max_internal_reloc_count
= 0;
3169 max_sym_shndx_count
= 0;
3171 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3173 struct bfd_elf_section_data
*esdo
= elf_section_data (o
);
3176 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
3178 unsigned int reloc_count
= 0;
3179 struct bfd_elf_section_data
*esdi
= NULL
;
3180 unsigned int *rel_count1
;
3182 if (p
->type
== bfd_section_reloc_link_order
3183 || p
->type
== bfd_symbol_reloc_link_order
)
3185 else if (p
->type
== bfd_indirect_link_order
)
3189 sec
= p
->u
.indirect
.section
;
3190 esdi
= elf_section_data (sec
);
3192 /* Mark all sections which are to be included in the
3193 link. This will normally be every section. We need
3194 to do this so that we can identify any sections which
3195 the linker has decided to not include. */
3196 sec
->linker_mark
= TRUE
;
3198 if (sec
->flags
& SEC_MERGE
)
3201 if (info
->relocatable
|| info
->emitrelocations
)
3202 reloc_count
= sec
->reloc_count
;
3203 else if (bed
->elf_backend_count_relocs
)
3205 Elf_Internal_Rela
* relocs
;
3207 relocs
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
3210 reloc_count
= (*bed
->elf_backend_count_relocs
) (sec
, relocs
);
3212 if (elf_section_data (o
)->relocs
!= relocs
)
3216 if (sec
->_raw_size
> max_contents_size
)
3217 max_contents_size
= sec
->_raw_size
;
3218 if (sec
->_cooked_size
> max_contents_size
)
3219 max_contents_size
= sec
->_cooked_size
;
3221 /* We are interested in just local symbols, not all
3223 if (bfd_get_flavour (sec
->owner
) == bfd_target_elf_flavour
3224 && (sec
->owner
->flags
& DYNAMIC
) == 0)
3228 if (elf_bad_symtab (sec
->owner
))
3229 sym_count
= (elf_tdata (sec
->owner
)->symtab_hdr
.sh_size
3230 / sizeof (Elf_External_Sym
));
3232 sym_count
= elf_tdata (sec
->owner
)->symtab_hdr
.sh_info
;
3234 if (sym_count
> max_sym_count
)
3235 max_sym_count
= sym_count
;
3237 if (sym_count
> max_sym_shndx_count
3238 && elf_symtab_shndx (sec
->owner
) != 0)
3239 max_sym_shndx_count
= sym_count
;
3241 if ((sec
->flags
& SEC_RELOC
) != 0)
3245 ext_size
= elf_section_data (sec
)->rel_hdr
.sh_size
;
3246 if (ext_size
> max_external_reloc_size
)
3247 max_external_reloc_size
= ext_size
;
3248 if (sec
->reloc_count
> max_internal_reloc_count
)
3249 max_internal_reloc_count
= sec
->reloc_count
;
3254 if (reloc_count
== 0)
3257 o
->reloc_count
+= reloc_count
;
3259 /* MIPS may have a mix of REL and RELA relocs on sections.
3260 To support this curious ABI we keep reloc counts in
3261 elf_section_data too. We must be careful to add the
3262 relocations from the input section to the right output
3263 count. FIXME: Get rid of one count. We have
3264 o->reloc_count == esdo->rel_count + esdo->rel_count2. */
3265 rel_count1
= &esdo
->rel_count
;
3268 bfd_boolean same_size
;
3269 bfd_size_type entsize1
;
3271 entsize1
= esdi
->rel_hdr
.sh_entsize
;
3272 BFD_ASSERT (entsize1
== sizeof (Elf_External_Rel
)
3273 || entsize1
== sizeof (Elf_External_Rela
));
3274 same_size
= (!o
->use_rela_p
3275 == (entsize1
== sizeof (Elf_External_Rel
)));
3278 rel_count1
= &esdo
->rel_count2
;
3280 if (esdi
->rel_hdr2
!= NULL
)
3282 bfd_size_type entsize2
= esdi
->rel_hdr2
->sh_entsize
;
3283 unsigned int alt_count
;
3284 unsigned int *rel_count2
;
3286 BFD_ASSERT (entsize2
!= entsize1
3287 && (entsize2
== sizeof (Elf_External_Rel
)
3288 || entsize2
== sizeof (Elf_External_Rela
)));
3290 rel_count2
= &esdo
->rel_count2
;
3292 rel_count2
= &esdo
->rel_count
;
3294 /* The following is probably too simplistic if the
3295 backend counts output relocs unusually. */
3296 BFD_ASSERT (bed
->elf_backend_count_relocs
== NULL
);
3297 alt_count
= NUM_SHDR_ENTRIES (esdi
->rel_hdr2
);
3298 *rel_count2
+= alt_count
;
3299 reloc_count
-= alt_count
;
3302 *rel_count1
+= reloc_count
;
3305 if (o
->reloc_count
> 0)
3306 o
->flags
|= SEC_RELOC
;
3309 /* Explicitly clear the SEC_RELOC flag. The linker tends to
3310 set it (this is probably a bug) and if it is set
3311 assign_section_numbers will create a reloc section. */
3312 o
->flags
&=~ SEC_RELOC
;
3315 /* If the SEC_ALLOC flag is not set, force the section VMA to
3316 zero. This is done in elf_fake_sections as well, but forcing
3317 the VMA to 0 here will ensure that relocs against these
3318 sections are handled correctly. */
3319 if ((o
->flags
& SEC_ALLOC
) == 0
3320 && ! o
->user_set_vma
)
3324 if (! info
->relocatable
&& merged
)
3325 elf_link_hash_traverse (elf_hash_table (info
),
3326 _bfd_elf_link_sec_merge_syms
, abfd
);
3328 /* Figure out the file positions for everything but the symbol table
3329 and the relocs. We set symcount to force assign_section_numbers
3330 to create a symbol table. */
3331 bfd_get_symcount (abfd
) = info
->strip
== strip_all
? 0 : 1;
3332 BFD_ASSERT (! abfd
->output_has_begun
);
3333 if (! _bfd_elf_compute_section_file_positions (abfd
, info
))
3336 /* That created the reloc sections. Set their sizes, and assign
3337 them file positions, and allocate some buffers. */
3338 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3340 if ((o
->flags
& SEC_RELOC
) != 0)
3342 if (!(_bfd_elf_link_size_reloc_section
3343 (abfd
, &elf_section_data (o
)->rel_hdr
, o
)))
3346 if (elf_section_data (o
)->rel_hdr2
3347 && !(_bfd_elf_link_size_reloc_section
3348 (abfd
, elf_section_data (o
)->rel_hdr2
, o
)))
3352 /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
3353 to count upwards while actually outputting the relocations. */
3354 elf_section_data (o
)->rel_count
= 0;
3355 elf_section_data (o
)->rel_count2
= 0;
3358 _bfd_elf_assign_file_positions_for_relocs (abfd
);
3360 /* We have now assigned file positions for all the sections except
3361 .symtab and .strtab. We start the .symtab section at the current
3362 file position, and write directly to it. We build the .strtab
3363 section in memory. */
3364 bfd_get_symcount (abfd
) = 0;
3365 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3366 /* sh_name is set in prep_headers. */
3367 symtab_hdr
->sh_type
= SHT_SYMTAB
;
3368 /* sh_flags, sh_addr and sh_size all start off zero. */
3369 symtab_hdr
->sh_entsize
= sizeof (Elf_External_Sym
);
3370 /* sh_link is set in assign_section_numbers. */
3371 /* sh_info is set below. */
3372 /* sh_offset is set just below. */
3373 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
3375 off
= elf_tdata (abfd
)->next_file_pos
;
3376 off
= _bfd_elf_assign_file_position_for_section (symtab_hdr
, off
, TRUE
);
3378 /* Note that at this point elf_tdata (abfd)->next_file_pos is
3379 incorrect. We do not yet know the size of the .symtab section.
3380 We correct next_file_pos below, after we do know the size. */
3382 /* Allocate a buffer to hold swapped out symbols. This is to avoid
3383 continuously seeking to the right position in the file. */
3384 if (! info
->keep_memory
|| max_sym_count
< 20)
3385 finfo
.symbuf_size
= 20;
3387 finfo
.symbuf_size
= max_sym_count
;
3388 amt
= finfo
.symbuf_size
;
3389 amt
*= sizeof (Elf_External_Sym
);
3390 finfo
.symbuf
= bfd_malloc (amt
);
3391 if (finfo
.symbuf
== NULL
)
3393 if (elf_numsections (abfd
) > SHN_LORESERVE
)
3395 /* Wild guess at number of output symbols. realloc'd as needed. */
3396 amt
= 2 * max_sym_count
+ elf_numsections (abfd
) + 1000;
3397 finfo
.shndxbuf_size
= amt
;
3398 amt
*= sizeof (Elf_External_Sym_Shndx
);
3399 finfo
.symshndxbuf
= bfd_zmalloc (amt
);
3400 if (finfo
.symshndxbuf
== NULL
)
3404 /* Start writing out the symbol table. The first symbol is always a
3406 if (info
->strip
!= strip_all
3409 elfsym
.st_value
= 0;
3412 elfsym
.st_other
= 0;
3413 elfsym
.st_shndx
= SHN_UNDEF
;
3414 if (! elf_link_output_sym (&finfo
, NULL
, &elfsym
, bfd_und_section_ptr
))
3419 /* Some standard ELF linkers do this, but we don't because it causes
3420 bootstrap comparison failures. */
3421 /* Output a file symbol for the output file as the second symbol.
3422 We output this even if we are discarding local symbols, although
3423 I'm not sure if this is correct. */
3424 elfsym
.st_value
= 0;
3426 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
3427 elfsym
.st_other
= 0;
3428 elfsym
.st_shndx
= SHN_ABS
;
3429 if (! elf_link_output_sym (&finfo
, bfd_get_filename (abfd
),
3430 &elfsym
, bfd_abs_section_ptr
))
3434 /* Output a symbol for each section. We output these even if we are
3435 discarding local symbols, since they are used for relocs. These
3436 symbols have no names. We store the index of each one in the
3437 index field of the section, so that we can find it again when
3438 outputting relocs. */
3439 if (info
->strip
!= strip_all
3443 elfsym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
3444 elfsym
.st_other
= 0;
3445 for (i
= 1; i
< elf_numsections (abfd
); i
++)
3447 o
= section_from_elf_index (abfd
, i
);
3449 o
->target_index
= bfd_get_symcount (abfd
);
3450 elfsym
.st_shndx
= i
;
3451 if (info
->relocatable
|| o
== NULL
)
3452 elfsym
.st_value
= 0;
3454 elfsym
.st_value
= o
->vma
;
3455 if (! elf_link_output_sym (&finfo
, NULL
, &elfsym
, o
))
3457 if (i
== SHN_LORESERVE
- 1)
3458 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3462 /* Allocate some memory to hold information read in from the input
3464 if (max_contents_size
!= 0)
3466 finfo
.contents
= bfd_malloc (max_contents_size
);
3467 if (finfo
.contents
== NULL
)
3471 if (max_external_reloc_size
!= 0)
3473 finfo
.external_relocs
= bfd_malloc (max_external_reloc_size
);
3474 if (finfo
.external_relocs
== NULL
)
3478 if (max_internal_reloc_count
!= 0)
3480 amt
= max_internal_reloc_count
* bed
->s
->int_rels_per_ext_rel
;
3481 amt
*= sizeof (Elf_Internal_Rela
);
3482 finfo
.internal_relocs
= bfd_malloc (amt
);
3483 if (finfo
.internal_relocs
== NULL
)
3487 if (max_sym_count
!= 0)
3489 amt
= max_sym_count
* sizeof (Elf_External_Sym
);
3490 finfo
.external_syms
= bfd_malloc (amt
);
3491 if (finfo
.external_syms
== NULL
)
3494 amt
= max_sym_count
* sizeof (Elf_Internal_Sym
);
3495 finfo
.internal_syms
= bfd_malloc (amt
);
3496 if (finfo
.internal_syms
== NULL
)
3499 amt
= max_sym_count
* sizeof (long);
3500 finfo
.indices
= bfd_malloc (amt
);
3501 if (finfo
.indices
== NULL
)
3504 amt
= max_sym_count
* sizeof (asection
*);
3505 finfo
.sections
= bfd_malloc (amt
);
3506 if (finfo
.sections
== NULL
)
3510 if (max_sym_shndx_count
!= 0)
3512 amt
= max_sym_shndx_count
* sizeof (Elf_External_Sym_Shndx
);
3513 finfo
.locsym_shndx
= bfd_malloc (amt
);
3514 if (finfo
.locsym_shndx
== NULL
)
3518 if (finfo
.first_tls_sec
)
3520 unsigned int align
= 0;
3521 bfd_vma base
= finfo
.first_tls_sec
->vma
, end
= 0;
3524 for (sec
= finfo
.first_tls_sec
;
3525 sec
&& (sec
->flags
& SEC_THREAD_LOCAL
);
3528 bfd_vma size
= sec
->_raw_size
;
3530 if (bfd_get_section_alignment (abfd
, sec
) > align
)
3531 align
= bfd_get_section_alignment (abfd
, sec
);
3532 if (sec
->_raw_size
== 0 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
3534 struct bfd_link_order
*o
;
3537 for (o
= sec
->link_order_head
; o
!= NULL
; o
= o
->next
)
3538 if (size
< o
->offset
+ o
->size
)
3539 size
= o
->offset
+ o
->size
;
3541 end
= sec
->vma
+ size
;
3543 elf_hash_table (info
)->tls_segment
3544 = bfd_zalloc (abfd
, sizeof (struct elf_link_tls_segment
));
3545 if (elf_hash_table (info
)->tls_segment
== NULL
)
3547 elf_hash_table (info
)->tls_segment
->start
= base
;
3548 elf_hash_table (info
)->tls_segment
->size
= end
- base
;
3549 elf_hash_table (info
)->tls_segment
->align
= align
;
3552 /* Since ELF permits relocations to be against local symbols, we
3553 must have the local symbols available when we do the relocations.
3554 Since we would rather only read the local symbols once, and we
3555 would rather not keep them in memory, we handle all the
3556 relocations for a single input file at the same time.
3558 Unfortunately, there is no way to know the total number of local
3559 symbols until we have seen all of them, and the local symbol
3560 indices precede the global symbol indices. This means that when
3561 we are generating relocatable output, and we see a reloc against
3562 a global symbol, we can not know the symbol index until we have
3563 finished examining all the local symbols to see which ones we are
3564 going to output. To deal with this, we keep the relocations in
3565 memory, and don't output them until the end of the link. This is
3566 an unfortunate waste of memory, but I don't see a good way around
3567 it. Fortunately, it only happens when performing a relocatable
3568 link, which is not the common case. FIXME: If keep_memory is set
3569 we could write the relocs out and then read them again; I don't
3570 know how bad the memory loss will be. */
3572 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
3573 sub
->output_has_begun
= FALSE
;
3574 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3576 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
3578 if (p
->type
== bfd_indirect_link_order
3579 && (bfd_get_flavour ((sub
= p
->u
.indirect
.section
->owner
))
3580 == bfd_target_elf_flavour
)
3581 && elf_elfheader (sub
)->e_ident
[EI_CLASS
] == bed
->s
->elfclass
)
3583 if (! sub
->output_has_begun
)
3585 if (! elf_link_input_bfd (&finfo
, sub
))
3587 sub
->output_has_begun
= TRUE
;
3590 else if (p
->type
== bfd_section_reloc_link_order
3591 || p
->type
== bfd_symbol_reloc_link_order
)
3593 if (! elf_reloc_link_order (abfd
, info
, o
, p
))
3598 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
3604 /* Output any global symbols that got converted to local in a
3605 version script or due to symbol visibility. We do this in a
3606 separate step since ELF requires all local symbols to appear
3607 prior to any global symbols. FIXME: We should only do this if
3608 some global symbols were, in fact, converted to become local.
3609 FIXME: Will this work correctly with the Irix 5 linker? */
3610 eoinfo
.failed
= FALSE
;
3611 eoinfo
.finfo
= &finfo
;
3612 eoinfo
.localsyms
= TRUE
;
3613 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
3618 /* That wrote out all the local symbols. Finish up the symbol table
3619 with the global symbols. Even if we want to strip everything we
3620 can, we still need to deal with those global symbols that got
3621 converted to local in a version script. */
3623 /* The sh_info field records the index of the first non local symbol. */
3624 symtab_hdr
->sh_info
= bfd_get_symcount (abfd
);
3627 && finfo
.dynsym_sec
->output_section
!= bfd_abs_section_ptr
)
3629 Elf_Internal_Sym sym
;
3630 Elf_External_Sym
*dynsym
=
3631 (Elf_External_Sym
*) finfo
.dynsym_sec
->contents
;
3632 long last_local
= 0;
3634 /* Write out the section symbols for the output sections. */
3641 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
3644 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3647 Elf_External_Sym
*dest
;
3649 indx
= elf_section_data (s
)->this_idx
;
3650 BFD_ASSERT (indx
> 0);
3651 sym
.st_shndx
= indx
;
3652 sym
.st_value
= s
->vma
;
3653 dest
= dynsym
+ elf_section_data (s
)->dynindx
;
3654 elf_swap_symbol_out (abfd
, &sym
, dest
, 0);
3657 last_local
= bfd_count_sections (abfd
);
3660 /* Write out the local dynsyms. */
3661 if (elf_hash_table (info
)->dynlocal
)
3663 struct elf_link_local_dynamic_entry
*e
;
3664 for (e
= elf_hash_table (info
)->dynlocal
; e
; e
= e
->next
)
3667 Elf_External_Sym
*dest
;
3669 sym
.st_size
= e
->isym
.st_size
;
3670 sym
.st_other
= e
->isym
.st_other
;
3672 /* Copy the internal symbol as is.
3673 Note that we saved a word of storage and overwrote
3674 the original st_name with the dynstr_index. */
3677 if (e
->isym
.st_shndx
!= SHN_UNDEF
3678 && (e
->isym
.st_shndx
< SHN_LORESERVE
3679 || e
->isym
.st_shndx
> SHN_HIRESERVE
))
3681 s
= bfd_section_from_elf_index (e
->input_bfd
,
3685 elf_section_data (s
->output_section
)->this_idx
;
3686 sym
.st_value
= (s
->output_section
->vma
3688 + e
->isym
.st_value
);
3691 if (last_local
< e
->dynindx
)
3692 last_local
= e
->dynindx
;
3694 dest
= dynsym
+ e
->dynindx
;
3695 elf_swap_symbol_out (abfd
, &sym
, dest
, 0);
3699 elf_section_data (finfo
.dynsym_sec
->output_section
)->this_hdr
.sh_info
=
3703 /* We get the global symbols from the hash table. */
3704 eoinfo
.failed
= FALSE
;
3705 eoinfo
.localsyms
= FALSE
;
3706 eoinfo
.finfo
= &finfo
;
3707 elf_link_hash_traverse (elf_hash_table (info
), elf_link_output_extsym
,
3712 /* If backend needs to output some symbols not present in the hash
3713 table, do it now. */
3714 if (bed
->elf_backend_output_arch_syms
)
3716 typedef bfd_boolean (*out_sym_func
)
3717 (void *, const char *, Elf_Internal_Sym
*, asection
*);
3719 if (! ((*bed
->elf_backend_output_arch_syms
)
3720 (abfd
, info
, &finfo
, (out_sym_func
) elf_link_output_sym
)))
3724 /* Flush all symbols to the file. */
3725 if (! elf_link_flush_output_syms (&finfo
))
3728 /* Now we know the size of the symtab section. */
3729 off
+= symtab_hdr
->sh_size
;
3731 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3732 if (symtab_shndx_hdr
->sh_name
!= 0)
3734 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
3735 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
3736 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
3737 amt
= bfd_get_symcount (abfd
) * sizeof (Elf_External_Sym_Shndx
);
3738 symtab_shndx_hdr
->sh_size
= amt
;
3740 off
= _bfd_elf_assign_file_position_for_section (symtab_shndx_hdr
,
3743 if (bfd_seek (abfd
, symtab_shndx_hdr
->sh_offset
, SEEK_SET
) != 0
3744 || (bfd_bwrite (finfo
.symshndxbuf
, amt
, abfd
) != amt
))
3749 /* Finish up and write out the symbol string table (.strtab)
3751 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3752 /* sh_name was set in prep_headers. */
3753 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
3754 symstrtab_hdr
->sh_flags
= 0;
3755 symstrtab_hdr
->sh_addr
= 0;
3756 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (finfo
.symstrtab
);
3757 symstrtab_hdr
->sh_entsize
= 0;
3758 symstrtab_hdr
->sh_link
= 0;
3759 symstrtab_hdr
->sh_info
= 0;
3760 /* sh_offset is set just below. */
3761 symstrtab_hdr
->sh_addralign
= 1;
3763 off
= _bfd_elf_assign_file_position_for_section (symstrtab_hdr
, off
, TRUE
);
3764 elf_tdata (abfd
)->next_file_pos
= off
;
3766 if (bfd_get_symcount (abfd
) > 0)
3768 if (bfd_seek (abfd
, symstrtab_hdr
->sh_offset
, SEEK_SET
) != 0
3769 || ! _bfd_stringtab_emit (abfd
, finfo
.symstrtab
))
3773 /* Adjust the relocs to have the correct symbol indices. */
3774 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3776 if ((o
->flags
& SEC_RELOC
) == 0)
3779 elf_link_adjust_relocs (abfd
, &elf_section_data (o
)->rel_hdr
,
3780 elf_section_data (o
)->rel_count
,
3781 elf_section_data (o
)->rel_hashes
);
3782 if (elf_section_data (o
)->rel_hdr2
!= NULL
)
3783 elf_link_adjust_relocs (abfd
, elf_section_data (o
)->rel_hdr2
,
3784 elf_section_data (o
)->rel_count2
,
3785 (elf_section_data (o
)->rel_hashes
3786 + elf_section_data (o
)->rel_count
));
3788 /* Set the reloc_count field to 0 to prevent write_relocs from
3789 trying to swap the relocs out itself. */
3793 if (dynamic
&& info
->combreloc
&& dynobj
!= NULL
)
3794 relativecount
= elf_link_sort_relocs (abfd
, info
, &reldyn
);
3796 /* If we are linking against a dynamic object, or generating a
3797 shared library, finish up the dynamic linking information. */
3800 Elf_External_Dyn
*dyncon
, *dynconend
;
3802 /* Fix up .dynamic entries. */
3803 o
= bfd_get_section_by_name (dynobj
, ".dynamic");
3804 BFD_ASSERT (o
!= NULL
);
3806 dyncon
= (Elf_External_Dyn
*) o
->contents
;
3807 dynconend
= (Elf_External_Dyn
*) (o
->contents
+ o
->_raw_size
);
3808 for (; dyncon
< dynconend
; dyncon
++)
3810 Elf_Internal_Dyn dyn
;
3814 elf_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3821 if (relativecount
> 0 && dyncon
+ 1 < dynconend
)
3823 switch (elf_section_data (reldyn
)->this_hdr
.sh_type
)
3825 case SHT_REL
: dyn
.d_tag
= DT_RELCOUNT
; break;
3826 case SHT_RELA
: dyn
.d_tag
= DT_RELACOUNT
; break;
3829 if (dyn
.d_tag
!= DT_NULL
)
3831 dyn
.d_un
.d_val
= relativecount
;
3832 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
3838 name
= info
->init_function
;
3841 name
= info
->fini_function
;
3844 struct elf_link_hash_entry
*h
;
3846 h
= elf_link_hash_lookup (elf_hash_table (info
), name
,
3847 FALSE
, FALSE
, TRUE
);
3849 && (h
->root
.type
== bfd_link_hash_defined
3850 || h
->root
.type
== bfd_link_hash_defweak
))
3852 dyn
.d_un
.d_val
= h
->root
.u
.def
.value
;
3853 o
= h
->root
.u
.def
.section
;
3854 if (o
->output_section
!= NULL
)
3855 dyn
.d_un
.d_val
+= (o
->output_section
->vma
3856 + o
->output_offset
);
3859 /* The symbol is imported from another shared
3860 library and does not apply to this one. */
3864 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
3869 case DT_PREINIT_ARRAYSZ
:
3870 name
= ".preinit_array";
3872 case DT_INIT_ARRAYSZ
:
3873 name
= ".init_array";
3875 case DT_FINI_ARRAYSZ
:
3876 name
= ".fini_array";
3878 o
= bfd_get_section_by_name (abfd
, name
);
3881 (*_bfd_error_handler
)
3882 (_("%s: could not find output section %s"),
3883 bfd_get_filename (abfd
), name
);
3886 if (o
->_raw_size
== 0)
3887 (*_bfd_error_handler
)
3888 (_("warning: %s section has zero size"), name
);
3889 dyn
.d_un
.d_val
= o
->_raw_size
;
3890 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
3893 case DT_PREINIT_ARRAY
:
3894 name
= ".preinit_array";
3897 name
= ".init_array";
3900 name
= ".fini_array";
3913 name
= ".gnu.version_d";
3916 name
= ".gnu.version_r";
3919 name
= ".gnu.version";
3921 o
= bfd_get_section_by_name (abfd
, name
);
3924 (*_bfd_error_handler
)
3925 (_("%s: could not find output section %s"),
3926 bfd_get_filename (abfd
), name
);
3929 dyn
.d_un
.d_ptr
= o
->vma
;
3930 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
3937 if (dyn
.d_tag
== DT_REL
|| dyn
.d_tag
== DT_RELSZ
)
3942 for (i
= 1; i
< elf_numsections (abfd
); i
++)
3944 Elf_Internal_Shdr
*hdr
;
3946 hdr
= elf_elfsections (abfd
)[i
];
3947 if (hdr
->sh_type
== type
3948 && (hdr
->sh_flags
& SHF_ALLOC
) != 0)
3950 if (dyn
.d_tag
== DT_RELSZ
|| dyn
.d_tag
== DT_RELASZ
)
3951 dyn
.d_un
.d_val
+= hdr
->sh_size
;
3954 if (dyn
.d_un
.d_val
== 0
3955 || hdr
->sh_addr
< dyn
.d_un
.d_val
)
3956 dyn
.d_un
.d_val
= hdr
->sh_addr
;
3960 elf_swap_dyn_out (dynobj
, &dyn
, dyncon
);
3966 /* If we have created any dynamic sections, then output them. */
3969 if (! (*bed
->elf_backend_finish_dynamic_sections
) (abfd
, info
))
3972 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
3974 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
3975 || o
->_raw_size
== 0
3976 || o
->output_section
== bfd_abs_section_ptr
)
3978 if ((o
->flags
& SEC_LINKER_CREATED
) == 0)
3980 /* At this point, we are only interested in sections
3981 created by _bfd_elf_link_create_dynamic_sections. */
3984 if ((elf_section_data (o
->output_section
)->this_hdr
.sh_type
3986 || strcmp (bfd_get_section_name (abfd
, o
), ".dynstr") != 0)
3988 if (! bfd_set_section_contents (abfd
, o
->output_section
,
3990 (file_ptr
) o
->output_offset
,
3996 /* The contents of the .dynstr section are actually in a
3998 off
= elf_section_data (o
->output_section
)->this_hdr
.sh_offset
;
3999 if (bfd_seek (abfd
, off
, SEEK_SET
) != 0
4000 || ! _bfd_elf_strtab_emit (abfd
,
4001 elf_hash_table (info
)->dynstr
))
4007 if (info
->relocatable
)
4009 bfd_boolean failed
= FALSE
;
4011 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
4016 /* If we have optimized stabs strings, output them. */
4017 if (elf_hash_table (info
)->stab_info
!= NULL
)
4019 if (! _bfd_write_stab_strings (abfd
, &elf_hash_table (info
)->stab_info
))
4023 if (info
->eh_frame_hdr
)
4025 if (! _bfd_elf_write_section_eh_frame_hdr (abfd
, info
))
4029 if (finfo
.symstrtab
!= NULL
)
4030 _bfd_stringtab_free (finfo
.symstrtab
);
4031 if (finfo
.contents
!= NULL
)
4032 free (finfo
.contents
);
4033 if (finfo
.external_relocs
!= NULL
)
4034 free (finfo
.external_relocs
);
4035 if (finfo
.internal_relocs
!= NULL
)
4036 free (finfo
.internal_relocs
);
4037 if (finfo
.external_syms
!= NULL
)
4038 free (finfo
.external_syms
);
4039 if (finfo
.locsym_shndx
!= NULL
)
4040 free (finfo
.locsym_shndx
);
4041 if (finfo
.internal_syms
!= NULL
)
4042 free (finfo
.internal_syms
);
4043 if (finfo
.indices
!= NULL
)
4044 free (finfo
.indices
);
4045 if (finfo
.sections
!= NULL
)
4046 free (finfo
.sections
);
4047 if (finfo
.symbuf
!= NULL
)
4048 free (finfo
.symbuf
);
4049 if (finfo
.symshndxbuf
!= NULL
)
4050 free (finfo
.symshndxbuf
);
4051 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4053 if ((o
->flags
& SEC_RELOC
) != 0
4054 && elf_section_data (o
)->rel_hashes
!= NULL
)
4055 free (elf_section_data (o
)->rel_hashes
);
4058 elf_tdata (abfd
)->linker
= TRUE
;
4063 if (finfo
.symstrtab
!= NULL
)
4064 _bfd_stringtab_free (finfo
.symstrtab
);
4065 if (finfo
.contents
!= NULL
)
4066 free (finfo
.contents
);
4067 if (finfo
.external_relocs
!= NULL
)
4068 free (finfo
.external_relocs
);
4069 if (finfo
.internal_relocs
!= NULL
)
4070 free (finfo
.internal_relocs
);
4071 if (finfo
.external_syms
!= NULL
)
4072 free (finfo
.external_syms
);
4073 if (finfo
.locsym_shndx
!= NULL
)
4074 free (finfo
.locsym_shndx
);
4075 if (finfo
.internal_syms
!= NULL
)
4076 free (finfo
.internal_syms
);
4077 if (finfo
.indices
!= NULL
)
4078 free (finfo
.indices
);
4079 if (finfo
.sections
!= NULL
)
4080 free (finfo
.sections
);
4081 if (finfo
.symbuf
!= NULL
)
4082 free (finfo
.symbuf
);
4083 if (finfo
.symshndxbuf
!= NULL
)
4084 free (finfo
.symshndxbuf
);
4085 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
4087 if ((o
->flags
& SEC_RELOC
) != 0
4088 && elf_section_data (o
)->rel_hashes
!= NULL
)
4089 free (elf_section_data (o
)->rel_hashes
);
4095 /* Add a symbol to the output symbol table. */
4098 elf_link_output_sym (struct elf_final_link_info
*finfo
,
4100 Elf_Internal_Sym
*elfsym
,
4101 asection
*input_sec
)
4103 Elf_External_Sym
*dest
;
4104 Elf_External_Sym_Shndx
*destshndx
;
4105 bfd_boolean (*output_symbol_hook
)
4106 (bfd
*, struct bfd_link_info
*info
, const char *,
4107 Elf_Internal_Sym
*, asection
*);
4109 output_symbol_hook
= get_elf_backend_data (finfo
->output_bfd
)->
4110 elf_backend_link_output_symbol_hook
;
4111 if (output_symbol_hook
!= NULL
)
4113 if (! ((*output_symbol_hook
)
4114 (finfo
->output_bfd
, finfo
->info
, name
, elfsym
, input_sec
)))
4118 if (name
== NULL
|| *name
== '\0')
4119 elfsym
->st_name
= 0;
4120 else if (input_sec
->flags
& SEC_EXCLUDE
)
4121 elfsym
->st_name
= 0;
4124 elfsym
->st_name
= (unsigned long) _bfd_stringtab_add (finfo
->symstrtab
,
4126 if (elfsym
->st_name
== (unsigned long) -1)
4130 if (finfo
->symbuf_count
>= finfo
->symbuf_size
)
4132 if (! elf_link_flush_output_syms (finfo
))
4136 dest
= finfo
->symbuf
+ finfo
->symbuf_count
;
4137 destshndx
= finfo
->symshndxbuf
;
4138 if (destshndx
!= NULL
)
4140 if (bfd_get_symcount (finfo
->output_bfd
) >= finfo
->shndxbuf_size
)
4144 amt
= finfo
->shndxbuf_size
* sizeof (Elf_External_Sym_Shndx
);
4145 finfo
->symshndxbuf
= destshndx
= bfd_realloc (destshndx
, amt
* 2);
4146 if (destshndx
== NULL
)
4148 memset ((char *) destshndx
+ amt
, 0, amt
);
4149 finfo
->shndxbuf_size
*= 2;
4151 destshndx
+= bfd_get_symcount (finfo
->output_bfd
);
4154 elf_swap_symbol_out (finfo
->output_bfd
, elfsym
, dest
, destshndx
);
4155 finfo
->symbuf_count
+= 1;
4156 bfd_get_symcount (finfo
->output_bfd
) += 1;
4161 /* Flush the output symbols to the file. */
4164 elf_link_flush_output_syms (struct elf_final_link_info
*finfo
)
4166 if (finfo
->symbuf_count
> 0)
4168 Elf_Internal_Shdr
*hdr
;
4172 hdr
= &elf_tdata (finfo
->output_bfd
)->symtab_hdr
;
4173 pos
= hdr
->sh_offset
+ hdr
->sh_size
;
4174 amt
= finfo
->symbuf_count
* sizeof (Elf_External_Sym
);
4175 if (bfd_seek (finfo
->output_bfd
, pos
, SEEK_SET
) != 0
4176 || bfd_bwrite (finfo
->symbuf
, amt
, finfo
->output_bfd
) != amt
)
4179 hdr
->sh_size
+= amt
;
4180 finfo
->symbuf_count
= 0;
4186 /* For DSOs loaded in via a DT_NEEDED entry, emulate ld.so in
4187 allowing an unsatisfied unversioned symbol in the DSO to match a
4188 versioned symbol that would normally require an explicit version.
4189 We also handle the case that a DSO references a hidden symbol
4190 which may be satisfied by a versioned symbol in another DSO. */
4193 elf_link_check_versioned_symbol (struct bfd_link_info
*info
,
4194 struct elf_link_hash_entry
*h
)
4197 struct elf_link_loaded_list
*loaded
;
4199 if (info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
)
4202 switch (h
->root
.type
)
4208 case bfd_link_hash_undefined
:
4209 case bfd_link_hash_undefweak
:
4210 abfd
= h
->root
.u
.undef
.abfd
;
4211 if ((abfd
->flags
& DYNAMIC
) == 0 || elf_dt_soname (abfd
) == NULL
)
4215 case bfd_link_hash_defined
:
4216 case bfd_link_hash_defweak
:
4217 abfd
= h
->root
.u
.def
.section
->owner
;
4220 case bfd_link_hash_common
:
4221 abfd
= h
->root
.u
.c
.p
->section
->owner
;
4224 BFD_ASSERT (abfd
!= NULL
);
4226 for (loaded
= elf_hash_table (info
)->loaded
;
4228 loaded
= loaded
->next
)
4231 Elf_Internal_Shdr
*hdr
;
4232 bfd_size_type symcount
;
4233 bfd_size_type extsymcount
;
4234 bfd_size_type extsymoff
;
4235 Elf_Internal_Shdr
*versymhdr
;
4236 Elf_Internal_Sym
*isym
;
4237 Elf_Internal_Sym
*isymend
;
4238 Elf_Internal_Sym
*isymbuf
;
4239 Elf_External_Versym
*ever
;
4240 Elf_External_Versym
*extversym
;
4242 input
= loaded
->abfd
;
4244 /* We check each DSO for a possible hidden versioned definition. */
4246 || (input
->flags
& DYNAMIC
) == 0
4247 || elf_dynversym (input
) == 0)
4250 hdr
= &elf_tdata (input
)->dynsymtab_hdr
;
4252 symcount
= hdr
->sh_size
/ sizeof (Elf_External_Sym
);
4253 if (elf_bad_symtab (input
))
4255 extsymcount
= symcount
;
4260 extsymcount
= symcount
- hdr
->sh_info
;
4261 extsymoff
= hdr
->sh_info
;
4264 if (extsymcount
== 0)
4267 isymbuf
= bfd_elf_get_elf_syms (input
, hdr
, extsymcount
, extsymoff
,
4269 if (isymbuf
== NULL
)
4272 /* Read in any version definitions. */
4273 versymhdr
= &elf_tdata (input
)->dynversym_hdr
;
4274 extversym
= bfd_malloc (versymhdr
->sh_size
);
4275 if (extversym
== NULL
)
4278 if (bfd_seek (input
, versymhdr
->sh_offset
, SEEK_SET
) != 0
4279 || (bfd_bread (extversym
, versymhdr
->sh_size
, input
)
4280 != versymhdr
->sh_size
))
4288 ever
= extversym
+ extsymoff
;
4289 isymend
= isymbuf
+ extsymcount
;
4290 for (isym
= isymbuf
; isym
< isymend
; isym
++, ever
++)
4293 Elf_Internal_Versym iver
;
4294 unsigned short version_index
;
4296 if (ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
4297 || isym
->st_shndx
== SHN_UNDEF
)
4300 name
= bfd_elf_string_from_elf_section (input
,
4303 if (strcmp (name
, h
->root
.root
.string
) != 0)
4306 _bfd_elf_swap_versym_in (input
, ever
, &iver
);
4308 if ((iver
.vs_vers
& VERSYM_HIDDEN
) == 0)
4310 /* If we have a non-hidden versioned sym, then it should
4311 have provided a definition for the undefined sym. */
4315 version_index
= iver
.vs_vers
& VERSYM_VERSION
;
4316 if (version_index
== 1 || version_index
== 2)
4318 /* This is the base or first version. We can use it. */
4332 /* Add an external symbol to the symbol table. This is called from
4333 the hash table traversal routine. When generating a shared object,
4334 we go through the symbol table twice. The first time we output
4335 anything that might have been forced to local scope in a version
4336 script. The second time we output the symbols that are still
4340 elf_link_output_extsym (struct elf_link_hash_entry
*h
, void *data
)
4342 struct elf_outext_info
*eoinfo
= data
;
4343 struct elf_final_link_info
*finfo
= eoinfo
->finfo
;
4345 Elf_Internal_Sym sym
;
4346 asection
*input_sec
;
4348 if (h
->root
.type
== bfd_link_hash_warning
)
4350 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4351 if (h
->root
.type
== bfd_link_hash_new
)
4355 /* Decide whether to output this symbol in this pass. */
4356 if (eoinfo
->localsyms
)
4358 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
4363 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
4367 /* If we have an undefined symbol reference here then it must have
4368 come from a shared library that is being linked in. (Undefined
4369 references in regular files have already been handled). If we
4370 are reporting errors for this situation then do so now. */
4371 if (h
->root
.type
== bfd_link_hash_undefined
4372 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0
4373 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0
4374 && ! elf_link_check_versioned_symbol (finfo
->info
, h
)
4375 && finfo
->info
->unresolved_syms_in_shared_libs
!= RM_IGNORE
)
4377 if (! ((*finfo
->info
->callbacks
->undefined_symbol
)
4378 (finfo
->info
, h
->root
.root
.string
, h
->root
.u
.undef
.abfd
,
4379 NULL
, 0, finfo
->info
->unresolved_syms_in_shared_libs
== RM_GENERATE_ERROR
)))
4381 eoinfo
->failed
= TRUE
;
4386 /* We should also warn if a forced local symbol is referenced from
4387 shared libraries. */
4388 if (! finfo
->info
->relocatable
4389 && (! finfo
->info
->shared
)
4390 && (h
->elf_link_hash_flags
4391 & (ELF_LINK_FORCED_LOCAL
| ELF_LINK_HASH_REF_DYNAMIC
| ELF_LINK_DYNAMIC_DEF
| ELF_LINK_DYNAMIC_WEAK
))
4392 == (ELF_LINK_FORCED_LOCAL
| ELF_LINK_HASH_REF_DYNAMIC
)
4393 && ! elf_link_check_versioned_symbol (finfo
->info
, h
))
4395 (*_bfd_error_handler
)
4396 (_("%s: %s symbol `%s' in %s is referenced by DSO"),
4397 bfd_get_filename (finfo
->output_bfd
),
4398 ELF_ST_VISIBILITY (h
->other
) == STV_INTERNAL
4400 : ELF_ST_VISIBILITY (h
->other
) == STV_HIDDEN
4401 ? "hidden" : "local",
4402 h
->root
.root
.string
,
4403 bfd_archive_filename (h
->root
.u
.def
.section
->owner
));
4404 eoinfo
->failed
= TRUE
;
4408 /* We don't want to output symbols that have never been mentioned by
4409 a regular file, or that we have been told to strip. However, if
4410 h->indx is set to -2, the symbol is used by a reloc and we must
4414 else if (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
4415 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) != 0)
4416 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0
4417 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) == 0)
4419 else if (finfo
->info
->strip
== strip_all
)
4421 else if (finfo
->info
->strip
== strip_some
4422 && bfd_hash_lookup (finfo
->info
->keep_hash
,
4423 h
->root
.root
.string
, FALSE
, FALSE
) == NULL
)
4425 else if (finfo
->info
->strip_discarded
4426 && (h
->root
.type
== bfd_link_hash_defined
4427 || h
->root
.type
== bfd_link_hash_defweak
)
4428 && elf_discarded_section (h
->root
.u
.def
.section
))
4433 /* If we're stripping it, and it's not a dynamic symbol, there's
4434 nothing else to do unless it is a forced local symbol. */
4437 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
4441 sym
.st_size
= h
->size
;
4442 sym
.st_other
= h
->other
;
4443 if ((h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
4444 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, h
->type
);
4445 else if (h
->root
.type
== bfd_link_hash_undefweak
4446 || h
->root
.type
== bfd_link_hash_defweak
)
4447 sym
.st_info
= ELF_ST_INFO (STB_WEAK
, h
->type
);
4449 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, h
->type
);
4451 switch (h
->root
.type
)
4454 case bfd_link_hash_new
:
4455 case bfd_link_hash_warning
:
4459 case bfd_link_hash_undefined
:
4460 case bfd_link_hash_undefweak
:
4461 input_sec
= bfd_und_section_ptr
;
4462 sym
.st_shndx
= SHN_UNDEF
;
4465 case bfd_link_hash_defined
:
4466 case bfd_link_hash_defweak
:
4468 input_sec
= h
->root
.u
.def
.section
;
4469 if (input_sec
->output_section
!= NULL
)
4472 _bfd_elf_section_from_bfd_section (finfo
->output_bfd
,
4473 input_sec
->output_section
);
4474 if (sym
.st_shndx
== SHN_BAD
)
4476 (*_bfd_error_handler
)
4477 (_("%s: could not find output section %s for input section %s"),
4478 bfd_get_filename (finfo
->output_bfd
),
4479 input_sec
->output_section
->name
,
4481 eoinfo
->failed
= TRUE
;
4485 /* ELF symbols in relocatable files are section relative,
4486 but in nonrelocatable files they are virtual
4488 sym
.st_value
= h
->root
.u
.def
.value
+ input_sec
->output_offset
;
4489 if (! finfo
->info
->relocatable
)
4491 sym
.st_value
+= input_sec
->output_section
->vma
;
4492 if (h
->type
== STT_TLS
)
4494 /* STT_TLS symbols are relative to PT_TLS segment
4496 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
4497 sym
.st_value
-= finfo
->first_tls_sec
->vma
;
4503 BFD_ASSERT (input_sec
->owner
== NULL
4504 || (input_sec
->owner
->flags
& DYNAMIC
) != 0);
4505 sym
.st_shndx
= SHN_UNDEF
;
4506 input_sec
= bfd_und_section_ptr
;
4511 case bfd_link_hash_common
:
4512 input_sec
= h
->root
.u
.c
.p
->section
;
4513 sym
.st_shndx
= SHN_COMMON
;
4514 sym
.st_value
= 1 << h
->root
.u
.c
.p
->alignment_power
;
4517 case bfd_link_hash_indirect
:
4518 /* These symbols are created by symbol versioning. They point
4519 to the decorated version of the name. For example, if the
4520 symbol foo@@GNU_1.2 is the default, which should be used when
4521 foo is used with no version, then we add an indirect symbol
4522 foo which points to foo@@GNU_1.2. We ignore these symbols,
4523 since the indirected symbol is already in the hash table. */
4527 /* Give the processor backend a chance to tweak the symbol value,
4528 and also to finish up anything that needs to be done for this
4529 symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
4530 forced local syms when non-shared is due to a historical quirk. */
4531 if ((h
->dynindx
!= -1
4532 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) != 0)
4533 && ((finfo
->info
->shared
4534 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4535 || h
->root
.type
!= bfd_link_hash_undefweak
))
4536 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
4537 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
4539 const struct elf_backend_data
*bed
;
4541 bed
= get_elf_backend_data (finfo
->output_bfd
);
4542 if (! ((*bed
->elf_backend_finish_dynamic_symbol
)
4543 (finfo
->output_bfd
, finfo
->info
, h
, &sym
)))
4545 eoinfo
->failed
= TRUE
;
4550 /* If we are marking the symbol as undefined, and there are no
4551 non-weak references to this symbol from a regular object, then
4552 mark the symbol as weak undefined; if there are non-weak
4553 references, mark the symbol as strong. We can't do this earlier,
4554 because it might not be marked as undefined until the
4555 finish_dynamic_symbol routine gets through with it. */
4556 if (sym
.st_shndx
== SHN_UNDEF
4557 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR
) != 0
4558 && (ELF_ST_BIND (sym
.st_info
) == STB_GLOBAL
4559 || ELF_ST_BIND (sym
.st_info
) == STB_WEAK
))
4563 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_REGULAR_NONWEAK
) != 0)
4564 bindtype
= STB_GLOBAL
;
4566 bindtype
= STB_WEAK
;
4567 sym
.st_info
= ELF_ST_INFO (bindtype
, ELF_ST_TYPE (sym
.st_info
));
4570 /* If a non-weak symbol with non-default visibility is not defined
4571 locally, it is a fatal error. */
4572 if (! finfo
->info
->relocatable
4573 && ELF_ST_VISIBILITY (sym
.st_other
) != STV_DEFAULT
4574 && ELF_ST_BIND (sym
.st_info
) != STB_WEAK
4575 && h
->root
.type
== bfd_link_hash_undefined
4576 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
4578 (*_bfd_error_handler
)
4579 (_("%s: %s symbol `%s' isn't defined"),
4580 bfd_get_filename (finfo
->output_bfd
),
4581 ELF_ST_VISIBILITY (sym
.st_other
) == STV_PROTECTED
4583 : ELF_ST_VISIBILITY (sym
.st_other
) == STV_INTERNAL
4584 ? "internal" : "hidden",
4585 h
->root
.root
.string
);
4586 eoinfo
->failed
= TRUE
;
4590 /* If this symbol should be put in the .dynsym section, then put it
4591 there now. We already know the symbol index. We also fill in
4592 the entry in the .hash section. */
4593 if (h
->dynindx
!= -1
4594 && elf_hash_table (finfo
->info
)->dynamic_sections_created
)
4598 size_t hash_entry_size
;
4599 bfd_byte
*bucketpos
;
4601 Elf_External_Sym
*esym
;
4603 sym
.st_name
= h
->dynstr_index
;
4604 esym
= (Elf_External_Sym
*) finfo
->dynsym_sec
->contents
+ h
->dynindx
;
4605 elf_swap_symbol_out (finfo
->output_bfd
, &sym
, esym
, 0);
4607 bucketcount
= elf_hash_table (finfo
->info
)->bucketcount
;
4608 bucket
= h
->elf_hash_value
% bucketcount
;
4610 = elf_section_data (finfo
->hash_sec
)->this_hdr
.sh_entsize
;
4611 bucketpos
= ((bfd_byte
*) finfo
->hash_sec
->contents
4612 + (bucket
+ 2) * hash_entry_size
);
4613 chain
= bfd_get (8 * hash_entry_size
, finfo
->output_bfd
, bucketpos
);
4614 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, h
->dynindx
, bucketpos
);
4615 bfd_put (8 * hash_entry_size
, finfo
->output_bfd
, chain
,
4616 ((bfd_byte
*) finfo
->hash_sec
->contents
4617 + (bucketcount
+ 2 + h
->dynindx
) * hash_entry_size
));
4619 if (finfo
->symver_sec
!= NULL
&& finfo
->symver_sec
->contents
!= NULL
)
4621 Elf_Internal_Versym iversym
;
4622 Elf_External_Versym
*eversym
;
4624 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
4626 if (h
->verinfo
.verdef
== NULL
)
4627 iversym
.vs_vers
= 0;
4629 iversym
.vs_vers
= h
->verinfo
.verdef
->vd_exp_refno
+ 1;
4633 if (h
->verinfo
.vertree
== NULL
)
4634 iversym
.vs_vers
= 1;
4636 iversym
.vs_vers
= h
->verinfo
.vertree
->vernum
+ 1;
4639 if ((h
->elf_link_hash_flags
& ELF_LINK_HIDDEN
) != 0)
4640 iversym
.vs_vers
|= VERSYM_HIDDEN
;
4642 eversym
= (Elf_External_Versym
*) finfo
->symver_sec
->contents
;
4643 eversym
+= h
->dynindx
;
4644 _bfd_elf_swap_versym_out (finfo
->output_bfd
, &iversym
, eversym
);
4648 /* If we're stripping it, then it was just a dynamic symbol, and
4649 there's nothing else to do. */
4650 if (strip
|| (input_sec
->flags
& SEC_EXCLUDE
) != 0)
4653 h
->indx
= bfd_get_symcount (finfo
->output_bfd
);
4655 if (! elf_link_output_sym (finfo
, h
->root
.root
.string
, &sym
, input_sec
))
4657 eoinfo
->failed
= TRUE
;
4664 /* Link an input file into the linker output file. This function
4665 handles all the sections and relocations of the input file at once.
4666 This is so that we only have to read the local symbols once, and
4667 don't have to keep them in memory. */
4670 elf_link_input_bfd (struct elf_final_link_info
*finfo
, bfd
*input_bfd
)
4672 bfd_boolean (*relocate_section
)
4673 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
4674 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**);
4676 Elf_Internal_Shdr
*symtab_hdr
;
4679 Elf_Internal_Sym
*isymbuf
;
4680 Elf_Internal_Sym
*isym
;
4681 Elf_Internal_Sym
*isymend
;
4683 asection
**ppsection
;
4685 const struct elf_backend_data
*bed
;
4686 bfd_boolean emit_relocs
;
4687 struct elf_link_hash_entry
**sym_hashes
;
4689 output_bfd
= finfo
->output_bfd
;
4690 bed
= get_elf_backend_data (output_bfd
);
4691 relocate_section
= bed
->elf_backend_relocate_section
;
4693 /* If this is a dynamic object, we don't want to do anything here:
4694 we don't want the local symbols, and we don't want the section
4696 if ((input_bfd
->flags
& DYNAMIC
) != 0)
4699 emit_relocs
= (finfo
->info
->relocatable
4700 || finfo
->info
->emitrelocations
4701 || bed
->elf_backend_emit_relocs
);
4703 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4704 if (elf_bad_symtab (input_bfd
))
4706 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
4711 locsymcount
= symtab_hdr
->sh_info
;
4712 extsymoff
= symtab_hdr
->sh_info
;
4715 /* Read the local symbols. */
4716 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4717 if (isymbuf
== NULL
&& locsymcount
!= 0)
4719 isymbuf
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, locsymcount
, 0,
4720 finfo
->internal_syms
,
4721 finfo
->external_syms
,
4722 finfo
->locsym_shndx
);
4723 if (isymbuf
== NULL
)
4727 /* Find local symbol sections and adjust values of symbols in
4728 SEC_MERGE sections. Write out those local symbols we know are
4729 going into the output file. */
4730 isymend
= isymbuf
+ locsymcount
;
4731 for (isym
= isymbuf
, pindex
= finfo
->indices
, ppsection
= finfo
->sections
;
4733 isym
++, pindex
++, ppsection
++)
4737 Elf_Internal_Sym osym
;
4741 if (elf_bad_symtab (input_bfd
))
4743 if (ELF_ST_BIND (isym
->st_info
) != STB_LOCAL
)
4750 if (isym
->st_shndx
== SHN_UNDEF
)
4751 isec
= bfd_und_section_ptr
;
4752 else if (isym
->st_shndx
< SHN_LORESERVE
4753 || isym
->st_shndx
> SHN_HIRESERVE
)
4755 isec
= section_from_elf_index (input_bfd
, isym
->st_shndx
);
4757 && isec
->sec_info_type
== ELF_INFO_TYPE_MERGE
4758 && ELF_ST_TYPE (isym
->st_info
) != STT_SECTION
)
4760 _bfd_merged_section_offset (output_bfd
, &isec
,
4761 elf_section_data (isec
)->sec_info
,
4764 else if (isym
->st_shndx
== SHN_ABS
)
4765 isec
= bfd_abs_section_ptr
;
4766 else if (isym
->st_shndx
== SHN_COMMON
)
4767 isec
= bfd_com_section_ptr
;
4776 /* Don't output the first, undefined, symbol. */
4777 if (ppsection
== finfo
->sections
)
4780 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
4782 /* We never output section symbols. Instead, we use the
4783 section symbol of the corresponding section in the output
4788 /* If we are stripping all symbols, we don't want to output this
4790 if (finfo
->info
->strip
== strip_all
)
4793 /* If we are discarding all local symbols, we don't want to
4794 output this one. If we are generating a relocatable output
4795 file, then some of the local symbols may be required by
4796 relocs; we output them below as we discover that they are
4798 if (finfo
->info
->discard
== discard_all
)
4801 /* If this symbol is defined in a section which we are
4802 discarding, we don't need to keep it, but note that
4803 linker_mark is only reliable for sections that have contents.
4804 For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
4805 as well as linker_mark. */
4806 if ((isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
4808 && ((! isec
->linker_mark
&& (isec
->flags
& SEC_HAS_CONTENTS
) != 0)
4809 || (! finfo
->info
->relocatable
4810 && (isec
->flags
& SEC_EXCLUDE
) != 0)))
4813 /* Get the name of the symbol. */
4814 name
= bfd_elf_string_from_elf_section (input_bfd
, symtab_hdr
->sh_link
,
4819 /* See if we are discarding symbols with this name. */
4820 if ((finfo
->info
->strip
== strip_some
4821 && (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, FALSE
, FALSE
)
4823 || (((finfo
->info
->discard
== discard_sec_merge
4824 && (isec
->flags
& SEC_MERGE
) && ! finfo
->info
->relocatable
)
4825 || finfo
->info
->discard
== discard_l
)
4826 && bfd_is_local_label_name (input_bfd
, name
)))
4829 /* If we get here, we are going to output this symbol. */
4833 /* Adjust the section index for the output file. */
4834 osym
.st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
4835 isec
->output_section
);
4836 if (osym
.st_shndx
== SHN_BAD
)
4839 *pindex
= bfd_get_symcount (output_bfd
);
4841 /* ELF symbols in relocatable files are section relative, but
4842 in executable files they are virtual addresses. Note that
4843 this code assumes that all ELF sections have an associated
4844 BFD section with a reasonable value for output_offset; below
4845 we assume that they also have a reasonable value for
4846 output_section. Any special sections must be set up to meet
4847 these requirements. */
4848 osym
.st_value
+= isec
->output_offset
;
4849 if (! finfo
->info
->relocatable
)
4851 osym
.st_value
+= isec
->output_section
->vma
;
4852 if (ELF_ST_TYPE (osym
.st_info
) == STT_TLS
)
4854 /* STT_TLS symbols are relative to PT_TLS segment base. */
4855 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
4856 osym
.st_value
-= finfo
->first_tls_sec
->vma
;
4860 if (! elf_link_output_sym (finfo
, name
, &osym
, isec
))
4864 /* Relocate the contents of each section. */
4865 sym_hashes
= elf_sym_hashes (input_bfd
);
4866 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4870 if (! o
->linker_mark
)
4872 /* This section was omitted from the link. */
4876 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4877 || (o
->_raw_size
== 0 && (o
->flags
& SEC_RELOC
) == 0))
4880 if ((o
->flags
& SEC_LINKER_CREATED
) != 0)
4882 /* Section was created by _bfd_elf_link_create_dynamic_sections
4887 /* Get the contents of the section. They have been cached by a
4888 relaxation routine. Note that o is a section in an input
4889 file, so the contents field will not have been set by any of
4890 the routines which work on output files. */
4891 if (elf_section_data (o
)->this_hdr
.contents
!= NULL
)
4892 contents
= elf_section_data (o
)->this_hdr
.contents
;
4895 contents
= finfo
->contents
;
4896 if (! bfd_get_section_contents (input_bfd
, o
, contents
, 0,
4901 if ((o
->flags
& SEC_RELOC
) != 0)
4903 Elf_Internal_Rela
*internal_relocs
;
4905 /* Get the swapped relocs. */
4907 = _bfd_elf_link_read_relocs (input_bfd
, o
, finfo
->external_relocs
,
4908 finfo
->internal_relocs
, FALSE
);
4909 if (internal_relocs
== NULL
4910 && o
->reloc_count
> 0)
4913 /* Run through the relocs looking for any against symbols
4914 from discarded sections and section symbols from
4915 removed link-once sections. Complain about relocs
4916 against discarded sections. Zero relocs against removed
4917 link-once sections. Preserve debug information as much
4919 if (!elf_section_ignore_discarded_relocs (o
))
4921 Elf_Internal_Rela
*rel
, *relend
;
4923 rel
= internal_relocs
;
4924 relend
= rel
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
4925 for ( ; rel
< relend
; rel
++)
4927 unsigned long r_symndx
= ELF_R_SYM (rel
->r_info
);
4930 if (r_symndx
>= locsymcount
4931 || (elf_bad_symtab (input_bfd
)
4932 && finfo
->sections
[r_symndx
] == NULL
))
4934 struct elf_link_hash_entry
*h
;
4936 h
= sym_hashes
[r_symndx
- extsymoff
];
4937 while (h
->root
.type
== bfd_link_hash_indirect
4938 || h
->root
.type
== bfd_link_hash_warning
)
4939 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4941 /* Complain if the definition comes from a
4942 discarded section. */
4943 sec
= h
->root
.u
.def
.section
;
4944 if ((h
->root
.type
== bfd_link_hash_defined
4945 || h
->root
.type
== bfd_link_hash_defweak
)
4946 && elf_discarded_section (sec
))
4948 if ((o
->flags
& SEC_DEBUGGING
) != 0)
4950 BFD_ASSERT (r_symndx
!= 0);
4951 /* Try to preserve debug information. */
4952 if ((o
->flags
& SEC_DEBUGGING
) != 0
4953 && sec
->kept_section
!= NULL
4954 && sec
->_raw_size
== sec
->kept_section
->_raw_size
)
4955 h
->root
.u
.def
.section
4956 = sec
->kept_section
;
4958 memset (rel
, 0, sizeof (*rel
));
4961 finfo
->info
->callbacks
->error_handler
4962 (LD_DEFINITION_IN_DISCARDED_SECTION
,
4963 _("%T: discarded in section `%s' from %s\n"),
4964 h
->root
.root
.string
,
4965 h
->root
.root
.string
,
4966 h
->root
.u
.def
.section
->name
,
4967 bfd_archive_filename (h
->root
.u
.def
.section
->owner
));
4972 sec
= finfo
->sections
[r_symndx
];
4974 if (sec
!= NULL
&& elf_discarded_section (sec
))
4976 if ((o
->flags
& SEC_DEBUGGING
) != 0
4977 || (sec
->flags
& SEC_LINK_ONCE
) != 0)
4979 BFD_ASSERT (r_symndx
!= 0);
4980 /* Try to preserve debug information. */
4981 if ((o
->flags
& SEC_DEBUGGING
) != 0
4982 && sec
->kept_section
!= NULL
4983 && sec
->_raw_size
== sec
->kept_section
->_raw_size
)
4984 finfo
->sections
[r_symndx
]
4985 = sec
->kept_section
;
4989 = ELF_R_INFO (0, ELF_R_TYPE (rel
->r_info
));
4999 ok
= asprintf (&buf
, "local symbol %d",
5002 buf
= (char *) "local symbol";
5003 finfo
->info
->callbacks
->error_handler
5004 (LD_DEFINITION_IN_DISCARDED_SECTION
,
5005 _("%T: discarded in section `%s' from %s\n"),
5006 buf
, buf
, sec
->name
,
5007 bfd_archive_filename (input_bfd
));
5016 /* Relocate the section by invoking a back end routine.
5018 The back end routine is responsible for adjusting the
5019 section contents as necessary, and (if using Rela relocs
5020 and generating a relocatable output file) adjusting the
5021 reloc addend as necessary.
5023 The back end routine does not have to worry about setting
5024 the reloc address or the reloc symbol index.
5026 The back end routine is given a pointer to the swapped in
5027 internal symbols, and can access the hash table entries
5028 for the external symbols via elf_sym_hashes (input_bfd).
5030 When generating relocatable output, the back end routine
5031 must handle STB_LOCAL/STT_SECTION symbols specially. The
5032 output symbol is going to be a section symbol
5033 corresponding to the output section, which will require
5034 the addend to be adjusted. */
5036 if (! (*relocate_section
) (output_bfd
, finfo
->info
,
5037 input_bfd
, o
, contents
,
5045 Elf_Internal_Rela
*irela
;
5046 Elf_Internal_Rela
*irelaend
;
5047 bfd_vma last_offset
;
5048 struct elf_link_hash_entry
**rel_hash
;
5049 Elf_Internal_Shdr
*input_rel_hdr
, *input_rel_hdr2
;
5050 unsigned int next_erel
;
5051 bfd_boolean (*reloc_emitter
)
5052 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*);
5053 bfd_boolean rela_normal
;
5055 input_rel_hdr
= &elf_section_data (o
)->rel_hdr
;
5056 rela_normal
= (bed
->rela_normal
5057 && (input_rel_hdr
->sh_entsize
5058 == sizeof (Elf_External_Rela
)));
5060 /* Adjust the reloc addresses and symbol indices. */
5062 irela
= internal_relocs
;
5063 irelaend
= irela
+ o
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
5064 rel_hash
= (elf_section_data (o
->output_section
)->rel_hashes
5065 + elf_section_data (o
->output_section
)->rel_count
5066 + elf_section_data (o
->output_section
)->rel_count2
);
5067 last_offset
= o
->output_offset
;
5068 if (!finfo
->info
->relocatable
)
5069 last_offset
+= o
->output_section
->vma
;
5070 for (next_erel
= 0; irela
< irelaend
; irela
++, next_erel
++)
5072 unsigned long r_symndx
;
5074 Elf_Internal_Sym sym
;
5076 if (next_erel
== bed
->s
->int_rels_per_ext_rel
)
5082 irela
->r_offset
= _bfd_elf_section_offset (output_bfd
,
5085 if (irela
->r_offset
>= (bfd_vma
) -2)
5087 /* This is a reloc for a deleted entry or somesuch.
5088 Turn it into an R_*_NONE reloc, at the same
5089 offset as the last reloc. elf_eh_frame.c and
5090 elf_bfd_discard_info rely on reloc offsets
5092 irela
->r_offset
= last_offset
;
5094 irela
->r_addend
= 0;
5098 irela
->r_offset
+= o
->output_offset
;
5100 /* Relocs in an executable have to be virtual addresses. */
5101 if (!finfo
->info
->relocatable
)
5102 irela
->r_offset
+= o
->output_section
->vma
;
5104 last_offset
= irela
->r_offset
;
5106 r_symndx
= ELF_R_SYM (irela
->r_info
);
5107 if (r_symndx
== STN_UNDEF
)
5110 if (r_symndx
>= locsymcount
5111 || (elf_bad_symtab (input_bfd
)
5112 && finfo
->sections
[r_symndx
] == NULL
))
5114 struct elf_link_hash_entry
*rh
;
5117 /* This is a reloc against a global symbol. We
5118 have not yet output all the local symbols, so
5119 we do not know the symbol index of any global
5120 symbol. We set the rel_hash entry for this
5121 reloc to point to the global hash table entry
5122 for this symbol. The symbol index is then
5123 set at the end of elf_bfd_final_link. */
5124 indx
= r_symndx
- extsymoff
;
5125 rh
= elf_sym_hashes (input_bfd
)[indx
];
5126 while (rh
->root
.type
== bfd_link_hash_indirect
5127 || rh
->root
.type
== bfd_link_hash_warning
)
5128 rh
= (struct elf_link_hash_entry
*) rh
->root
.u
.i
.link
;
5130 /* Setting the index to -2 tells
5131 elf_link_output_extsym that this symbol is
5133 BFD_ASSERT (rh
->indx
< 0);
5141 /* This is a reloc against a local symbol. */
5144 sym
= isymbuf
[r_symndx
];
5145 sec
= finfo
->sections
[r_symndx
];
5146 if (ELF_ST_TYPE (sym
.st_info
) == STT_SECTION
)
5148 /* I suppose the backend ought to fill in the
5149 section of any STT_SECTION symbol against a
5150 processor specific section. If we have
5151 discarded a section, the output_section will
5152 be the absolute section. */
5153 if (bfd_is_abs_section (sec
)
5155 && bfd_is_abs_section (sec
->output_section
)))
5157 else if (sec
== NULL
|| sec
->owner
== NULL
)
5159 bfd_set_error (bfd_error_bad_value
);
5164 r_symndx
= sec
->output_section
->target_index
;
5165 BFD_ASSERT (r_symndx
!= 0);
5168 /* Adjust the addend according to where the
5169 section winds up in the output section. */
5171 irela
->r_addend
+= sec
->output_offset
;
5175 if (finfo
->indices
[r_symndx
] == -1)
5177 unsigned long shlink
;
5181 if (finfo
->info
->strip
== strip_all
)
5183 /* You can't do ld -r -s. */
5184 bfd_set_error (bfd_error_invalid_operation
);
5188 /* This symbol was skipped earlier, but
5189 since it is needed by a reloc, we
5190 must output it now. */
5191 shlink
= symtab_hdr
->sh_link
;
5192 name
= (bfd_elf_string_from_elf_section
5193 (input_bfd
, shlink
, sym
.st_name
));
5197 osec
= sec
->output_section
;
5199 _bfd_elf_section_from_bfd_section (output_bfd
,
5201 if (sym
.st_shndx
== SHN_BAD
)
5204 sym
.st_value
+= sec
->output_offset
;
5205 if (! finfo
->info
->relocatable
)
5207 sym
.st_value
+= osec
->vma
;
5208 if (ELF_ST_TYPE (sym
.st_info
) == STT_TLS
)
5210 /* STT_TLS symbols are relative to PT_TLS
5212 BFD_ASSERT (finfo
->first_tls_sec
!= NULL
);
5213 sym
.st_value
-= finfo
->first_tls_sec
->vma
;
5217 finfo
->indices
[r_symndx
]
5218 = bfd_get_symcount (output_bfd
);
5220 if (! elf_link_output_sym (finfo
, name
, &sym
, sec
))
5224 r_symndx
= finfo
->indices
[r_symndx
];
5227 irela
->r_info
= ELF_R_INFO (r_symndx
,
5228 ELF_R_TYPE (irela
->r_info
));
5231 /* Swap out the relocs. */
5232 if (bed
->elf_backend_emit_relocs
5233 && !(finfo
->info
->relocatable
5234 || finfo
->info
->emitrelocations
))
5235 reloc_emitter
= bed
->elf_backend_emit_relocs
;
5237 reloc_emitter
= _bfd_elf_link_output_relocs
;
5239 if (input_rel_hdr
->sh_size
!= 0
5240 && ! (*reloc_emitter
) (output_bfd
, o
, input_rel_hdr
,
5244 input_rel_hdr2
= elf_section_data (o
)->rel_hdr2
;
5245 if (input_rel_hdr2
&& input_rel_hdr2
->sh_size
!= 0)
5247 internal_relocs
+= (NUM_SHDR_ENTRIES (input_rel_hdr
)
5248 * bed
->s
->int_rels_per_ext_rel
);
5249 if (! (*reloc_emitter
) (output_bfd
, o
, input_rel_hdr2
,
5256 /* Write out the modified section contents. */
5257 if (bed
->elf_backend_write_section
5258 && (*bed
->elf_backend_write_section
) (output_bfd
, o
, contents
))
5260 /* Section written out. */
5262 else switch (o
->sec_info_type
)
5264 case ELF_INFO_TYPE_STABS
:
5265 if (! (_bfd_write_section_stabs
5267 &elf_hash_table (finfo
->info
)->stab_info
,
5268 o
, &elf_section_data (o
)->sec_info
, contents
)))
5271 case ELF_INFO_TYPE_MERGE
:
5272 if (! _bfd_write_merged_section (output_bfd
, o
,
5273 elf_section_data (o
)->sec_info
))
5276 case ELF_INFO_TYPE_EH_FRAME
:
5278 if (! _bfd_elf_write_section_eh_frame (output_bfd
, finfo
->info
,
5285 bfd_size_type sec_size
;
5287 sec_size
= (o
->_cooked_size
!= 0 ? o
->_cooked_size
: o
->_raw_size
);
5288 if (! (o
->flags
& SEC_EXCLUDE
)
5289 && ! bfd_set_section_contents (output_bfd
, o
->output_section
,
5291 (file_ptr
) o
->output_offset
,
5302 /* Generate a reloc when linking an ELF file. This is a reloc
5303 requested by the linker, and does come from any input file. This
5304 is used to build constructor and destructor tables when linking
5308 elf_reloc_link_order (bfd
*output_bfd
,
5309 struct bfd_link_info
*info
,
5310 asection
*output_section
,
5311 struct bfd_link_order
*link_order
)
5313 reloc_howto_type
*howto
;
5317 struct elf_link_hash_entry
**rel_hash_ptr
;
5318 Elf_Internal_Shdr
*rel_hdr
;
5319 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
5320 Elf_Internal_Rela irel
[MAX_INT_RELS_PER_EXT_REL
];
5324 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
5327 bfd_set_error (bfd_error_bad_value
);
5331 addend
= link_order
->u
.reloc
.p
->addend
;
5333 /* Figure out the symbol index. */
5334 rel_hash_ptr
= (elf_section_data (output_section
)->rel_hashes
5335 + elf_section_data (output_section
)->rel_count
5336 + elf_section_data (output_section
)->rel_count2
);
5337 if (link_order
->type
== bfd_section_reloc_link_order
)
5339 indx
= link_order
->u
.reloc
.p
->u
.section
->target_index
;
5340 BFD_ASSERT (indx
!= 0);
5341 *rel_hash_ptr
= NULL
;
5345 struct elf_link_hash_entry
*h
;
5347 /* Treat a reloc against a defined symbol as though it were
5348 actually against the section. */
5349 h
= ((struct elf_link_hash_entry
*)
5350 bfd_wrapped_link_hash_lookup (output_bfd
, info
,
5351 link_order
->u
.reloc
.p
->u
.name
,
5352 FALSE
, FALSE
, TRUE
));
5354 && (h
->root
.type
== bfd_link_hash_defined
5355 || h
->root
.type
== bfd_link_hash_defweak
))
5359 section
= h
->root
.u
.def
.section
;
5360 indx
= section
->output_section
->target_index
;
5361 *rel_hash_ptr
= NULL
;
5362 /* It seems that we ought to add the symbol value to the
5363 addend here, but in practice it has already been added
5364 because it was passed to constructor_callback. */
5365 addend
+= section
->output_section
->vma
+ section
->output_offset
;
5369 /* Setting the index to -2 tells elf_link_output_extsym that
5370 this symbol is used by a reloc. */
5377 if (! ((*info
->callbacks
->unattached_reloc
)
5378 (info
, link_order
->u
.reloc
.p
->u
.name
, NULL
, NULL
, 0)))
5384 /* If this is an inplace reloc, we must write the addend into the
5386 if (howto
->partial_inplace
&& addend
!= 0)
5389 bfd_reloc_status_type rstat
;
5392 const char *sym_name
;
5394 size
= bfd_get_reloc_size (howto
);
5395 buf
= bfd_zmalloc (size
);
5398 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
5405 case bfd_reloc_outofrange
:
5408 case bfd_reloc_overflow
:
5409 if (link_order
->type
== bfd_section_reloc_link_order
)
5410 sym_name
= bfd_section_name (output_bfd
,
5411 link_order
->u
.reloc
.p
->u
.section
);
5413 sym_name
= link_order
->u
.reloc
.p
->u
.name
;
5414 if (! ((*info
->callbacks
->reloc_overflow
)
5415 (info
, sym_name
, howto
->name
, addend
, NULL
, NULL
, 0)))
5422 ok
= bfd_set_section_contents (output_bfd
, output_section
, buf
,
5423 link_order
->offset
, size
);
5429 /* The address of a reloc is relative to the section in a
5430 relocatable file, and is a virtual address in an executable
5432 offset
= link_order
->offset
;
5433 if (! info
->relocatable
)
5434 offset
+= output_section
->vma
;
5436 for (i
= 0; i
< bed
->s
->int_rels_per_ext_rel
; i
++)
5438 irel
[i
].r_offset
= offset
;
5440 irel
[i
].r_addend
= 0;
5442 irel
[0].r_info
= ELF_R_INFO (indx
, howto
->type
);
5444 rel_hdr
= &elf_section_data (output_section
)->rel_hdr
;
5445 erel
= rel_hdr
->contents
;
5446 if (rel_hdr
->sh_type
== SHT_REL
)
5448 erel
+= (elf_section_data (output_section
)->rel_count
5449 * sizeof (Elf_External_Rel
));
5450 (*bed
->s
->swap_reloc_out
) (output_bfd
, irel
, erel
);
5454 irel
[0].r_addend
= addend
;
5455 erel
+= (elf_section_data (output_section
)->rel_count
5456 * sizeof (Elf_External_Rela
));
5457 (*bed
->s
->swap_reloca_out
) (output_bfd
, irel
, erel
);
5460 ++elf_section_data (output_section
)->rel_count
;
5465 /* Garbage collect unused sections. */
5467 static bfd_boolean elf_gc_sweep_symbol
5468 (struct elf_link_hash_entry
*, void *);
5470 static bfd_boolean elf_gc_allocate_got_offsets
5471 (struct elf_link_hash_entry
*, void *);
5473 /* The mark phase of garbage collection. For a given section, mark
5474 it and any sections in this section's group, and all the sections
5475 which define symbols to which it refers. */
5477 typedef asection
* (*gc_mark_hook_fn
)
5478 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
5479 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
5482 elf_gc_mark (struct bfd_link_info
*info
,
5484 gc_mark_hook_fn gc_mark_hook
)
5487 asection
*group_sec
;
5491 /* Mark all the sections in the group. */
5492 group_sec
= elf_section_data (sec
)->next_in_group
;
5493 if (group_sec
&& !group_sec
->gc_mark
)
5494 if (!elf_gc_mark (info
, group_sec
, gc_mark_hook
))
5497 /* Look through the section relocs. */
5499 if ((sec
->flags
& SEC_RELOC
) != 0 && sec
->reloc_count
> 0)
5501 Elf_Internal_Rela
*relstart
, *rel
, *relend
;
5502 Elf_Internal_Shdr
*symtab_hdr
;
5503 struct elf_link_hash_entry
**sym_hashes
;
5506 bfd
*input_bfd
= sec
->owner
;
5507 const struct elf_backend_data
*bed
= get_elf_backend_data (input_bfd
);
5508 Elf_Internal_Sym
*isym
= NULL
;
5510 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
5511 sym_hashes
= elf_sym_hashes (input_bfd
);
5513 /* Read the local symbols. */
5514 if (elf_bad_symtab (input_bfd
))
5516 nlocsyms
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
5520 extsymoff
= nlocsyms
= symtab_hdr
->sh_info
;
5522 isym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
5523 if (isym
== NULL
&& nlocsyms
!= 0)
5525 isym
= bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
, nlocsyms
, 0,
5531 /* Read the relocations. */
5532 relstart
= _bfd_elf_link_read_relocs (input_bfd
, sec
, NULL
, NULL
,
5534 if (relstart
== NULL
)
5539 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
5541 for (rel
= relstart
; rel
< relend
; rel
++)
5543 unsigned long r_symndx
;
5545 struct elf_link_hash_entry
*h
;
5547 r_symndx
= ELF_R_SYM (rel
->r_info
);
5551 if (r_symndx
>= nlocsyms
5552 || ELF_ST_BIND (isym
[r_symndx
].st_info
) != STB_LOCAL
)
5554 h
= sym_hashes
[r_symndx
- extsymoff
];
5555 rsec
= (*gc_mark_hook
) (sec
, info
, rel
, h
, NULL
);
5559 rsec
= (*gc_mark_hook
) (sec
, info
, rel
, NULL
, &isym
[r_symndx
]);
5562 if (rsec
&& !rsec
->gc_mark
)
5564 if (bfd_get_flavour (rsec
->owner
) != bfd_target_elf_flavour
)
5566 else if (!elf_gc_mark (info
, rsec
, gc_mark_hook
))
5575 if (elf_section_data (sec
)->relocs
!= relstart
)
5578 if (isym
!= NULL
&& symtab_hdr
->contents
!= (unsigned char *) isym
)
5580 if (! info
->keep_memory
)
5583 symtab_hdr
->contents
= (unsigned char *) isym
;
5590 /* The sweep phase of garbage collection. Remove all garbage sections. */
5592 typedef bfd_boolean (*gc_sweep_hook_fn
)
5593 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
5596 elf_gc_sweep (struct bfd_link_info
*info
, gc_sweep_hook_fn gc_sweep_hook
)
5600 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5604 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
5607 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5609 /* Keep special sections. Keep .debug sections. */
5610 if ((o
->flags
& SEC_LINKER_CREATED
)
5611 || (o
->flags
& SEC_DEBUGGING
))
5617 /* Skip sweeping sections already excluded. */
5618 if (o
->flags
& SEC_EXCLUDE
)
5621 /* Since this is early in the link process, it is simple
5622 to remove a section from the output. */
5623 o
->flags
|= SEC_EXCLUDE
;
5625 /* But we also have to update some of the relocation
5626 info we collected before. */
5628 && (o
->flags
& SEC_RELOC
) && o
->reloc_count
> 0)
5630 Elf_Internal_Rela
*internal_relocs
;
5634 = _bfd_elf_link_read_relocs (o
->owner
, o
, NULL
, NULL
,
5636 if (internal_relocs
== NULL
)
5639 r
= (*gc_sweep_hook
) (o
->owner
, info
, o
, internal_relocs
);
5641 if (elf_section_data (o
)->relocs
!= internal_relocs
)
5642 free (internal_relocs
);
5650 /* Remove the symbols that were in the swept sections from the dynamic
5651 symbol table. GCFIXME: Anyone know how to get them out of the
5652 static symbol table as well? */
5656 elf_link_hash_traverse (elf_hash_table (info
), elf_gc_sweep_symbol
, &i
);
5658 elf_hash_table (info
)->dynsymcount
= i
;
5664 /* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
5667 elf_gc_sweep_symbol (struct elf_link_hash_entry
*h
, void *idxptr
)
5671 if (h
->root
.type
== bfd_link_hash_warning
)
5672 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5674 if (h
->dynindx
!= -1
5675 && ((h
->root
.type
!= bfd_link_hash_defined
5676 && h
->root
.type
!= bfd_link_hash_defweak
)
5677 || h
->root
.u
.def
.section
->gc_mark
))
5678 h
->dynindx
= (*idx
)++;
5683 /* Propogate collected vtable information. This is called through
5684 elf_link_hash_traverse. */
5687 elf_gc_propagate_vtable_entries_used (struct elf_link_hash_entry
*h
, void *okp
)
5689 if (h
->root
.type
== bfd_link_hash_warning
)
5690 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5692 /* Those that are not vtables. */
5693 if (h
->vtable_parent
== NULL
)
5696 /* Those vtables that do not have parents, we cannot merge. */
5697 if (h
->vtable_parent
== (struct elf_link_hash_entry
*) -1)
5700 /* If we've already been done, exit. */
5701 if (h
->vtable_entries_used
&& h
->vtable_entries_used
[-1])
5704 /* Make sure the parent's table is up to date. */
5705 elf_gc_propagate_vtable_entries_used (h
->vtable_parent
, okp
);
5707 if (h
->vtable_entries_used
== NULL
)
5709 /* None of this table's entries were referenced. Re-use the
5711 h
->vtable_entries_used
= h
->vtable_parent
->vtable_entries_used
;
5712 h
->vtable_entries_size
= h
->vtable_parent
->vtable_entries_size
;
5717 bfd_boolean
*cu
, *pu
;
5719 /* Or the parent's entries into ours. */
5720 cu
= h
->vtable_entries_used
;
5722 pu
= h
->vtable_parent
->vtable_entries_used
;
5725 const struct elf_backend_data
*bed
;
5726 unsigned int log_file_align
;
5728 bed
= get_elf_backend_data (h
->root
.u
.def
.section
->owner
);
5729 log_file_align
= bed
->s
->log_file_align
;
5730 n
= h
->vtable_parent
->vtable_entries_size
>> log_file_align
;
5745 elf_gc_smash_unused_vtentry_relocs (struct elf_link_hash_entry
*h
, void *okp
)
5748 bfd_vma hstart
, hend
;
5749 Elf_Internal_Rela
*relstart
, *relend
, *rel
;
5750 const struct elf_backend_data
*bed
;
5751 unsigned int log_file_align
;
5753 if (h
->root
.type
== bfd_link_hash_warning
)
5754 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
5756 /* Take care of both those symbols that do not describe vtables as
5757 well as those that are not loaded. */
5758 if (h
->vtable_parent
== NULL
)
5761 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
5762 || h
->root
.type
== bfd_link_hash_defweak
);
5764 sec
= h
->root
.u
.def
.section
;
5765 hstart
= h
->root
.u
.def
.value
;
5766 hend
= hstart
+ h
->size
;
5768 relstart
= _bfd_elf_link_read_relocs (sec
->owner
, sec
, NULL
, NULL
, TRUE
);
5770 return *(bfd_boolean
*) okp
= FALSE
;
5771 bed
= get_elf_backend_data (sec
->owner
);
5772 log_file_align
= bed
->s
->log_file_align
;
5774 relend
= relstart
+ sec
->reloc_count
* bed
->s
->int_rels_per_ext_rel
;
5776 for (rel
= relstart
; rel
< relend
; ++rel
)
5777 if (rel
->r_offset
>= hstart
&& rel
->r_offset
< hend
)
5779 /* If the entry is in use, do nothing. */
5780 if (h
->vtable_entries_used
5781 && (rel
->r_offset
- hstart
) < h
->vtable_entries_size
)
5783 bfd_vma entry
= (rel
->r_offset
- hstart
) >> log_file_align
;
5784 if (h
->vtable_entries_used
[entry
])
5787 /* Otherwise, kill it. */
5788 rel
->r_offset
= rel
->r_info
= rel
->r_addend
= 0;
5794 /* Do mark and sweep of unused sections. */
5797 elf_gc_sections (bfd
*abfd
, struct bfd_link_info
*info
)
5799 bfd_boolean ok
= TRUE
;
5801 asection
* (*gc_mark_hook
)
5802 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
5803 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*);
5805 if (!get_elf_backend_data (abfd
)->can_gc_sections
5806 || info
->relocatable
|| info
->emitrelocations
5807 || elf_hash_table (info
)->dynamic_sections_created
)
5810 /* Apply transitive closure to the vtable entry usage info. */
5811 elf_link_hash_traverse (elf_hash_table (info
),
5812 elf_gc_propagate_vtable_entries_used
,
5817 /* Kill the vtable relocations that were not used. */
5818 elf_link_hash_traverse (elf_hash_table (info
),
5819 elf_gc_smash_unused_vtentry_relocs
,
5824 /* Grovel through relocs to find out who stays ... */
5826 gc_mark_hook
= get_elf_backend_data (abfd
)->gc_mark_hook
;
5827 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
5831 if (bfd_get_flavour (sub
) != bfd_target_elf_flavour
)
5834 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
5836 if (o
->flags
& SEC_KEEP
)
5837 if (!elf_gc_mark (info
, o
, gc_mark_hook
))
5842 /* ... and mark SEC_EXCLUDE for those that go. */
5843 if (!elf_gc_sweep (info
, get_elf_backend_data (abfd
)->gc_sweep_hook
))
5849 /* Called from check_relocs to record the existance of a VTINHERIT reloc. */
5852 elf_gc_record_vtinherit (bfd
*abfd
,
5854 struct elf_link_hash_entry
*h
,
5857 struct elf_link_hash_entry
**sym_hashes
, **sym_hashes_end
;
5858 struct elf_link_hash_entry
**search
, *child
;
5859 bfd_size_type extsymcount
;
5861 /* The sh_info field of the symtab header tells us where the
5862 external symbols start. We don't care about the local symbols at
5864 extsymcount
= elf_tdata (abfd
)->symtab_hdr
.sh_size
/sizeof (Elf_External_Sym
);
5865 if (!elf_bad_symtab (abfd
))
5866 extsymcount
-= elf_tdata (abfd
)->symtab_hdr
.sh_info
;
5868 sym_hashes
= elf_sym_hashes (abfd
);
5869 sym_hashes_end
= sym_hashes
+ extsymcount
;
5871 /* Hunt down the child symbol, which is in this section at the same
5872 offset as the relocation. */
5873 for (search
= sym_hashes
; search
!= sym_hashes_end
; ++search
)
5875 if ((child
= *search
) != NULL
5876 && (child
->root
.type
== bfd_link_hash_defined
5877 || child
->root
.type
== bfd_link_hash_defweak
)
5878 && child
->root
.u
.def
.section
== sec
5879 && child
->root
.u
.def
.value
== offset
)
5883 (*_bfd_error_handler
) ("%s: %s+%lu: No symbol found for INHERIT",
5884 bfd_archive_filename (abfd
), sec
->name
,
5885 (unsigned long) offset
);
5886 bfd_set_error (bfd_error_invalid_operation
);
5892 /* This *should* only be the absolute section. It could potentially
5893 be that someone has defined a non-global vtable though, which
5894 would be bad. It isn't worth paging in the local symbols to be
5895 sure though; that case should simply be handled by the assembler. */
5897 child
->vtable_parent
= (struct elf_link_hash_entry
*) -1;
5900 child
->vtable_parent
= h
;
5905 /* Called from check_relocs to record the existance of a VTENTRY reloc. */
5908 elf_gc_record_vtentry (bfd
*abfd ATTRIBUTE_UNUSED
,
5909 asection
*sec ATTRIBUTE_UNUSED
,
5910 struct elf_link_hash_entry
*h
,
5913 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5914 unsigned int log_file_align
= bed
->s
->log_file_align
;
5916 if (addend
>= h
->vtable_entries_size
)
5918 size_t size
, bytes
, file_align
;
5919 bfd_boolean
*ptr
= h
->vtable_entries_used
;
5921 /* While the symbol is undefined, we have to be prepared to handle
5923 file_align
= 1 << log_file_align
;
5924 if (h
->root
.type
== bfd_link_hash_undefined
)
5925 size
= addend
+ file_align
;
5931 /* Oops! We've got a reference past the defined end of
5932 the table. This is probably a bug -- shall we warn? */
5933 size
= addend
+ file_align
;
5936 size
= (size
+ file_align
- 1) & -file_align
;
5938 /* Allocate one extra entry for use as a "done" flag for the
5939 consolidation pass. */
5940 bytes
= ((size
>> log_file_align
) + 1) * sizeof (bfd_boolean
);
5944 ptr
= bfd_realloc (ptr
- 1, bytes
);
5950 oldbytes
= (((h
->vtable_entries_size
>> log_file_align
) + 1)
5951 * sizeof (bfd_boolean
));
5952 memset (((char *) ptr
) + oldbytes
, 0, bytes
- oldbytes
);
5956 ptr
= bfd_zmalloc (bytes
);
5961 /* And arrange for that done flag to be at index -1. */
5962 h
->vtable_entries_used
= ptr
+ 1;
5963 h
->vtable_entries_size
= size
;
5966 h
->vtable_entries_used
[addend
>> log_file_align
] = TRUE
;
5971 /* And an accompanying bit to work out final got entry offsets once
5972 we're done. Should be called from final_link. */
5975 elf_gc_common_finalize_got_offsets (bfd
*abfd
,
5976 struct bfd_link_info
*info
)
5979 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5982 /* The GOT offset is relative to the .got section, but the GOT header is
5983 put into the .got.plt section, if the backend uses it. */
5984 if (bed
->want_got_plt
)
5987 gotoff
= bed
->got_header_size
;
5989 /* Do the local .got entries first. */
5990 for (i
= info
->input_bfds
; i
; i
= i
->link_next
)
5992 bfd_signed_vma
*local_got
;
5993 bfd_size_type j
, locsymcount
;
5994 Elf_Internal_Shdr
*symtab_hdr
;
5996 if (bfd_get_flavour (i
) != bfd_target_elf_flavour
)
5999 local_got
= elf_local_got_refcounts (i
);
6003 symtab_hdr
= &elf_tdata (i
)->symtab_hdr
;
6004 if (elf_bad_symtab (i
))
6005 locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6007 locsymcount
= symtab_hdr
->sh_info
;
6009 for (j
= 0; j
< locsymcount
; ++j
)
6011 if (local_got
[j
] > 0)
6013 local_got
[j
] = gotoff
;
6014 gotoff
+= ARCH_SIZE
/ 8;
6017 local_got
[j
] = (bfd_vma
) -1;
6021 /* Then the global .got entries. .plt refcounts are handled by
6022 adjust_dynamic_symbol */
6023 elf_link_hash_traverse (elf_hash_table (info
),
6024 elf_gc_allocate_got_offsets
,
6029 /* We need a special top-level link routine to convert got reference counts
6030 to real got offsets. */
6033 elf_gc_allocate_got_offsets (struct elf_link_hash_entry
*h
, void *offarg
)
6035 bfd_vma
*off
= offarg
;
6037 if (h
->root
.type
== bfd_link_hash_warning
)
6038 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6040 if (h
->got
.refcount
> 0)
6042 h
->got
.offset
= off
[0];
6043 off
[0] += ARCH_SIZE
/ 8;
6046 h
->got
.offset
= (bfd_vma
) -1;
6051 /* Many folk need no more in the way of final link than this, once
6052 got entry reference counting is enabled. */
6055 elf_gc_common_final_link (bfd
*abfd
, struct bfd_link_info
*info
)
6057 if (!elf_gc_common_finalize_got_offsets (abfd
, info
))
6060 /* Invoke the regular ELF backend linker to do all the work. */
6061 return elf_bfd_final_link (abfd
, info
);
6064 /* This function will be called though elf_link_hash_traverse to store
6065 all hash value of the exported symbols in an array. */
6068 elf_collect_hash_codes (struct elf_link_hash_entry
*h
, void *data
)
6070 unsigned long **valuep
= data
;
6076 if (h
->root
.type
== bfd_link_hash_warning
)
6077 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6079 /* Ignore indirect symbols. These are added by the versioning code. */
6080 if (h
->dynindx
== -1)
6083 name
= h
->root
.root
.string
;
6084 p
= strchr (name
, ELF_VER_CHR
);
6087 alc
= bfd_malloc (p
- name
+ 1);
6088 memcpy (alc
, name
, p
- name
);
6089 alc
[p
- name
] = '\0';
6093 /* Compute the hash value. */
6094 ha
= bfd_elf_hash (name
);
6096 /* Store the found hash value in the array given as the argument. */
6099 /* And store it in the struct so that we can put it in the hash table
6101 h
->elf_hash_value
= ha
;
6110 elf_reloc_symbol_deleted_p (bfd_vma offset
, void *cookie
)
6112 struct elf_reloc_cookie
*rcookie
= cookie
;
6114 if (rcookie
->bad_symtab
)
6115 rcookie
->rel
= rcookie
->rels
;
6117 for (; rcookie
->rel
< rcookie
->relend
; rcookie
->rel
++)
6119 unsigned long r_symndx
;
6121 if (! rcookie
->bad_symtab
)
6122 if (rcookie
->rel
->r_offset
> offset
)
6124 if (rcookie
->rel
->r_offset
!= offset
)
6127 r_symndx
= ELF_R_SYM (rcookie
->rel
->r_info
);
6128 if (r_symndx
== SHN_UNDEF
)
6131 if (r_symndx
>= rcookie
->locsymcount
6132 || ELF_ST_BIND (rcookie
->locsyms
[r_symndx
].st_info
) != STB_LOCAL
)
6134 struct elf_link_hash_entry
*h
;
6136 h
= rcookie
->sym_hashes
[r_symndx
- rcookie
->extsymoff
];
6138 while (h
->root
.type
== bfd_link_hash_indirect
6139 || h
->root
.type
== bfd_link_hash_warning
)
6140 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
6142 if ((h
->root
.type
== bfd_link_hash_defined
6143 || h
->root
.type
== bfd_link_hash_defweak
)
6144 && elf_discarded_section (h
->root
.u
.def
.section
))
6151 /* It's not a relocation against a global symbol,
6152 but it could be a relocation against a local
6153 symbol for a discarded section. */
6155 Elf_Internal_Sym
*isym
;
6157 /* Need to: get the symbol; get the section. */
6158 isym
= &rcookie
->locsyms
[r_symndx
];
6159 if (isym
->st_shndx
< SHN_LORESERVE
|| isym
->st_shndx
> SHN_HIRESERVE
)
6161 isec
= section_from_elf_index (rcookie
->abfd
, isym
->st_shndx
);
6162 if (isec
!= NULL
&& elf_discarded_section (isec
))
6171 /* Discard unneeded references to discarded sections.
6172 Returns TRUE if any section's size was changed. */
6173 /* This function assumes that the relocations are in sorted order,
6174 which is true for all known assemblers. */
6177 elf_bfd_discard_info (bfd
*output_bfd
, struct bfd_link_info
*info
)
6179 struct elf_reloc_cookie cookie
;
6180 asection
*stab
, *eh
;
6181 Elf_Internal_Shdr
*symtab_hdr
;
6182 const struct elf_backend_data
*bed
;
6185 bfd_boolean ret
= FALSE
;
6187 if (info
->traditional_format
6188 || info
->hash
->creator
->flavour
!= bfd_target_elf_flavour
6189 || ! is_elf_hash_table (info
))
6192 for (abfd
= info
->input_bfds
; abfd
!= NULL
; abfd
= abfd
->link_next
)
6194 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
6197 bed
= get_elf_backend_data (abfd
);
6199 if ((abfd
->flags
& DYNAMIC
) != 0)
6202 eh
= bfd_get_section_by_name (abfd
, ".eh_frame");
6203 if (info
->relocatable
6205 && (eh
->_raw_size
== 0
6206 || bfd_is_abs_section (eh
->output_section
))))
6209 stab
= bfd_get_section_by_name (abfd
, ".stab");
6211 && (stab
->_raw_size
== 0
6212 || bfd_is_abs_section (stab
->output_section
)
6213 || stab
->sec_info_type
!= ELF_INFO_TYPE_STABS
))
6218 && bed
->elf_backend_discard_info
== NULL
)
6221 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6223 cookie
.sym_hashes
= elf_sym_hashes (abfd
);
6224 cookie
.bad_symtab
= elf_bad_symtab (abfd
);
6225 if (cookie
.bad_symtab
)
6227 cookie
.locsymcount
= symtab_hdr
->sh_size
/ sizeof (Elf_External_Sym
);
6228 cookie
.extsymoff
= 0;
6232 cookie
.locsymcount
= symtab_hdr
->sh_info
;
6233 cookie
.extsymoff
= symtab_hdr
->sh_info
;
6236 cookie
.locsyms
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
6237 if (cookie
.locsyms
== NULL
&& cookie
.locsymcount
!= 0)
6239 cookie
.locsyms
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
6240 cookie
.locsymcount
, 0,
6242 if (cookie
.locsyms
== NULL
)
6249 count
= stab
->reloc_count
;
6251 cookie
.rels
= _bfd_elf_link_read_relocs (abfd
, stab
, NULL
, NULL
,
6253 if (cookie
.rels
!= NULL
)
6255 cookie
.rel
= cookie
.rels
;
6256 cookie
.relend
= cookie
.rels
;
6257 cookie
.relend
+= count
* bed
->s
->int_rels_per_ext_rel
;
6258 if (_bfd_discard_section_stabs (abfd
, stab
,
6259 elf_section_data (stab
)->sec_info
,
6260 elf_reloc_symbol_deleted_p
,
6263 if (elf_section_data (stab
)->relocs
!= cookie
.rels
)
6271 count
= eh
->reloc_count
;
6273 cookie
.rels
= _bfd_elf_link_read_relocs (abfd
, eh
, NULL
, NULL
,
6275 cookie
.rel
= cookie
.rels
;
6276 cookie
.relend
= cookie
.rels
;
6277 if (cookie
.rels
!= NULL
)
6278 cookie
.relend
+= count
* bed
->s
->int_rels_per_ext_rel
;
6280 if (_bfd_elf_discard_section_eh_frame (abfd
, info
, eh
,
6281 elf_reloc_symbol_deleted_p
,
6285 if (cookie
.rels
!= NULL
6286 && elf_section_data (eh
)->relocs
!= cookie
.rels
)
6290 if (bed
->elf_backend_discard_info
!= NULL
6291 && (*bed
->elf_backend_discard_info
) (abfd
, &cookie
, info
))
6294 if (cookie
.locsyms
!= NULL
6295 && symtab_hdr
->contents
!= (unsigned char *) cookie
.locsyms
)
6297 if (! info
->keep_memory
)
6298 free (cookie
.locsyms
);
6300 symtab_hdr
->contents
= (unsigned char *) cookie
.locsyms
;
6304 if (info
->eh_frame_hdr
6305 && !info
->relocatable
6306 && _bfd_elf_discard_section_eh_frame_hdr (output_bfd
, info
))
6313 elf_section_ignore_discarded_relocs (asection
*sec
)
6315 const struct elf_backend_data
*bed
;
6317 switch (sec
->sec_info_type
)
6319 case ELF_INFO_TYPE_STABS
:
6320 case ELF_INFO_TYPE_EH_FRAME
:
6326 bed
= get_elf_backend_data (sec
->owner
);
6327 if (bed
->elf_backend_ignore_discarded_relocs
!= NULL
6328 && (*bed
->elf_backend_ignore_discarded_relocs
) (sec
))