1 /* ELF executable support for BFD.
3 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
4 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 BFD support for ELF formats is being worked on.
27 Currently, the best supported back ends are for sparc and i386
28 (running svr4 or Solaris 2).
30 Documentation of the internals of the support code still needs
31 to be written. The code is changing quickly enough that we
32 haven't bothered yet. */
34 /* For sparc64-cross-sparc32. */
42 #include "libiberty.h"
44 static int elf_sort_sections (const void *, const void *);
45 static bfd_boolean
assign_file_positions_except_relocs (bfd
*, struct bfd_link_info
*);
46 static bfd_boolean
prep_headers (bfd
*);
47 static bfd_boolean
swap_out_syms (bfd
*, struct bfd_strtab_hash
**, int) ;
48 static bfd_boolean
elfcore_read_notes (bfd
*, file_ptr
, bfd_size_type
) ;
50 /* Swap version information in and out. The version information is
51 currently size independent. If that ever changes, this code will
52 need to move into elfcode.h. */
54 /* Swap in a Verdef structure. */
57 _bfd_elf_swap_verdef_in (bfd
*abfd
,
58 const Elf_External_Verdef
*src
,
59 Elf_Internal_Verdef
*dst
)
61 dst
->vd_version
= H_GET_16 (abfd
, src
->vd_version
);
62 dst
->vd_flags
= H_GET_16 (abfd
, src
->vd_flags
);
63 dst
->vd_ndx
= H_GET_16 (abfd
, src
->vd_ndx
);
64 dst
->vd_cnt
= H_GET_16 (abfd
, src
->vd_cnt
);
65 dst
->vd_hash
= H_GET_32 (abfd
, src
->vd_hash
);
66 dst
->vd_aux
= H_GET_32 (abfd
, src
->vd_aux
);
67 dst
->vd_next
= H_GET_32 (abfd
, src
->vd_next
);
70 /* Swap out a Verdef structure. */
73 _bfd_elf_swap_verdef_out (bfd
*abfd
,
74 const Elf_Internal_Verdef
*src
,
75 Elf_External_Verdef
*dst
)
77 H_PUT_16 (abfd
, src
->vd_version
, dst
->vd_version
);
78 H_PUT_16 (abfd
, src
->vd_flags
, dst
->vd_flags
);
79 H_PUT_16 (abfd
, src
->vd_ndx
, dst
->vd_ndx
);
80 H_PUT_16 (abfd
, src
->vd_cnt
, dst
->vd_cnt
);
81 H_PUT_32 (abfd
, src
->vd_hash
, dst
->vd_hash
);
82 H_PUT_32 (abfd
, src
->vd_aux
, dst
->vd_aux
);
83 H_PUT_32 (abfd
, src
->vd_next
, dst
->vd_next
);
86 /* Swap in a Verdaux structure. */
89 _bfd_elf_swap_verdaux_in (bfd
*abfd
,
90 const Elf_External_Verdaux
*src
,
91 Elf_Internal_Verdaux
*dst
)
93 dst
->vda_name
= H_GET_32 (abfd
, src
->vda_name
);
94 dst
->vda_next
= H_GET_32 (abfd
, src
->vda_next
);
97 /* Swap out a Verdaux structure. */
100 _bfd_elf_swap_verdaux_out (bfd
*abfd
,
101 const Elf_Internal_Verdaux
*src
,
102 Elf_External_Verdaux
*dst
)
104 H_PUT_32 (abfd
, src
->vda_name
, dst
->vda_name
);
105 H_PUT_32 (abfd
, src
->vda_next
, dst
->vda_next
);
108 /* Swap in a Verneed structure. */
111 _bfd_elf_swap_verneed_in (bfd
*abfd
,
112 const Elf_External_Verneed
*src
,
113 Elf_Internal_Verneed
*dst
)
115 dst
->vn_version
= H_GET_16 (abfd
, src
->vn_version
);
116 dst
->vn_cnt
= H_GET_16 (abfd
, src
->vn_cnt
);
117 dst
->vn_file
= H_GET_32 (abfd
, src
->vn_file
);
118 dst
->vn_aux
= H_GET_32 (abfd
, src
->vn_aux
);
119 dst
->vn_next
= H_GET_32 (abfd
, src
->vn_next
);
122 /* Swap out a Verneed structure. */
125 _bfd_elf_swap_verneed_out (bfd
*abfd
,
126 const Elf_Internal_Verneed
*src
,
127 Elf_External_Verneed
*dst
)
129 H_PUT_16 (abfd
, src
->vn_version
, dst
->vn_version
);
130 H_PUT_16 (abfd
, src
->vn_cnt
, dst
->vn_cnt
);
131 H_PUT_32 (abfd
, src
->vn_file
, dst
->vn_file
);
132 H_PUT_32 (abfd
, src
->vn_aux
, dst
->vn_aux
);
133 H_PUT_32 (abfd
, src
->vn_next
, dst
->vn_next
);
136 /* Swap in a Vernaux structure. */
139 _bfd_elf_swap_vernaux_in (bfd
*abfd
,
140 const Elf_External_Vernaux
*src
,
141 Elf_Internal_Vernaux
*dst
)
143 dst
->vna_hash
= H_GET_32 (abfd
, src
->vna_hash
);
144 dst
->vna_flags
= H_GET_16 (abfd
, src
->vna_flags
);
145 dst
->vna_other
= H_GET_16 (abfd
, src
->vna_other
);
146 dst
->vna_name
= H_GET_32 (abfd
, src
->vna_name
);
147 dst
->vna_next
= H_GET_32 (abfd
, src
->vna_next
);
150 /* Swap out a Vernaux structure. */
153 _bfd_elf_swap_vernaux_out (bfd
*abfd
,
154 const Elf_Internal_Vernaux
*src
,
155 Elf_External_Vernaux
*dst
)
157 H_PUT_32 (abfd
, src
->vna_hash
, dst
->vna_hash
);
158 H_PUT_16 (abfd
, src
->vna_flags
, dst
->vna_flags
);
159 H_PUT_16 (abfd
, src
->vna_other
, dst
->vna_other
);
160 H_PUT_32 (abfd
, src
->vna_name
, dst
->vna_name
);
161 H_PUT_32 (abfd
, src
->vna_next
, dst
->vna_next
);
164 /* Swap in a Versym structure. */
167 _bfd_elf_swap_versym_in (bfd
*abfd
,
168 const Elf_External_Versym
*src
,
169 Elf_Internal_Versym
*dst
)
171 dst
->vs_vers
= H_GET_16 (abfd
, src
->vs_vers
);
174 /* Swap out a Versym structure. */
177 _bfd_elf_swap_versym_out (bfd
*abfd
,
178 const Elf_Internal_Versym
*src
,
179 Elf_External_Versym
*dst
)
181 H_PUT_16 (abfd
, src
->vs_vers
, dst
->vs_vers
);
184 /* Standard ELF hash function. Do not change this function; you will
185 cause invalid hash tables to be generated. */
188 bfd_elf_hash (const char *namearg
)
190 const unsigned char *name
= (const unsigned char *) namearg
;
195 while ((ch
= *name
++) != '\0')
198 if ((g
= (h
& 0xf0000000)) != 0)
201 /* The ELF ABI says `h &= ~g', but this is equivalent in
202 this case and on some machines one insn instead of two. */
206 return h
& 0xffffffff;
209 /* Read a specified number of bytes at a specified offset in an ELF
210 file, into a newly allocated buffer, and return a pointer to the
214 elf_read (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
218 if ((buf
= bfd_alloc (abfd
, size
)) == NULL
)
220 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
222 if (bfd_bread (buf
, size
, abfd
) != size
)
224 if (bfd_get_error () != bfd_error_system_call
)
225 bfd_set_error (bfd_error_file_truncated
);
232 bfd_elf_mkobject (bfd
*abfd
)
234 /* This just does initialization. */
235 /* coff_mkobject zalloc's space for tdata.coff_obj_data ... */
236 elf_tdata (abfd
) = bfd_zalloc (abfd
, sizeof (struct elf_obj_tdata
));
237 if (elf_tdata (abfd
) == 0)
239 /* Since everything is done at close time, do we need any
246 bfd_elf_mkcorefile (bfd
*abfd
)
248 /* I think this can be done just like an object file. */
249 return bfd_elf_mkobject (abfd
);
253 bfd_elf_get_str_section (bfd
*abfd
, unsigned int shindex
)
255 Elf_Internal_Shdr
**i_shdrp
;
256 bfd_byte
*shstrtab
= NULL
;
258 bfd_size_type shstrtabsize
;
260 i_shdrp
= elf_elfsections (abfd
);
261 if (i_shdrp
== 0 || i_shdrp
[shindex
] == 0)
264 shstrtab
= i_shdrp
[shindex
]->contents
;
265 if (shstrtab
== NULL
)
267 /* No cached one, attempt to read, and cache what we read. */
268 offset
= i_shdrp
[shindex
]->sh_offset
;
269 shstrtabsize
= i_shdrp
[shindex
]->sh_size
;
270 shstrtab
= elf_read (abfd
, offset
, shstrtabsize
);
271 i_shdrp
[shindex
]->contents
= shstrtab
;
273 return (char *) shstrtab
;
277 bfd_elf_string_from_elf_section (bfd
*abfd
,
278 unsigned int shindex
,
279 unsigned int strindex
)
281 Elf_Internal_Shdr
*hdr
;
286 hdr
= elf_elfsections (abfd
)[shindex
];
288 if (hdr
->contents
== NULL
289 && bfd_elf_get_str_section (abfd
, shindex
) == NULL
)
292 if (strindex
>= hdr
->sh_size
)
294 unsigned int shstrndx
= elf_elfheader(abfd
)->e_shstrndx
;
295 (*_bfd_error_handler
)
296 (_("%B: invalid string offset %u >= %lu for section `%s'"),
297 abfd
, strindex
, (unsigned long) hdr
->sh_size
,
298 (shindex
== shstrndx
&& strindex
== hdr
->sh_name
300 : bfd_elf_string_from_elf_section (abfd
, shstrndx
, hdr
->sh_name
)));
304 return ((char *) hdr
->contents
) + strindex
;
307 /* Read and convert symbols to internal format.
308 SYMCOUNT specifies the number of symbols to read, starting from
309 symbol SYMOFFSET. If any of INTSYM_BUF, EXTSYM_BUF or EXTSHNDX_BUF
310 are non-NULL, they are used to store the internal symbols, external
311 symbols, and symbol section index extensions, respectively. */
314 bfd_elf_get_elf_syms (bfd
*ibfd
,
315 Elf_Internal_Shdr
*symtab_hdr
,
318 Elf_Internal_Sym
*intsym_buf
,
320 Elf_External_Sym_Shndx
*extshndx_buf
)
322 Elf_Internal_Shdr
*shndx_hdr
;
324 const bfd_byte
*esym
;
325 Elf_External_Sym_Shndx
*alloc_extshndx
;
326 Elf_External_Sym_Shndx
*shndx
;
327 Elf_Internal_Sym
*isym
;
328 Elf_Internal_Sym
*isymend
;
329 const struct elf_backend_data
*bed
;
337 /* Normal syms might have section extension entries. */
339 if (symtab_hdr
== &elf_tdata (ibfd
)->symtab_hdr
)
340 shndx_hdr
= &elf_tdata (ibfd
)->symtab_shndx_hdr
;
342 /* Read the symbols. */
344 alloc_extshndx
= NULL
;
345 bed
= get_elf_backend_data (ibfd
);
346 extsym_size
= bed
->s
->sizeof_sym
;
347 amt
= symcount
* extsym_size
;
348 pos
= symtab_hdr
->sh_offset
+ symoffset
* extsym_size
;
349 if (extsym_buf
== NULL
)
351 alloc_ext
= bfd_malloc (amt
);
352 extsym_buf
= alloc_ext
;
354 if (extsym_buf
== NULL
355 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
356 || bfd_bread (extsym_buf
, amt
, ibfd
) != amt
)
362 if (shndx_hdr
== NULL
|| shndx_hdr
->sh_size
== 0)
366 amt
= symcount
* sizeof (Elf_External_Sym_Shndx
);
367 pos
= shndx_hdr
->sh_offset
+ symoffset
* sizeof (Elf_External_Sym_Shndx
);
368 if (extshndx_buf
== NULL
)
370 alloc_extshndx
= bfd_malloc (amt
);
371 extshndx_buf
= alloc_extshndx
;
373 if (extshndx_buf
== NULL
374 || bfd_seek (ibfd
, pos
, SEEK_SET
) != 0
375 || bfd_bread (extshndx_buf
, amt
, ibfd
) != amt
)
382 if (intsym_buf
== NULL
)
384 bfd_size_type amt
= symcount
* sizeof (Elf_Internal_Sym
);
385 intsym_buf
= bfd_malloc (amt
);
386 if (intsym_buf
== NULL
)
390 /* Convert the symbols to internal form. */
391 isymend
= intsym_buf
+ symcount
;
392 for (esym
= extsym_buf
, isym
= intsym_buf
, shndx
= extshndx_buf
;
394 esym
+= extsym_size
, isym
++, shndx
= shndx
!= NULL
? shndx
+ 1 : NULL
)
395 (*bed
->s
->swap_symbol_in
) (ibfd
, esym
, shndx
, isym
);
398 if (alloc_ext
!= NULL
)
400 if (alloc_extshndx
!= NULL
)
401 free (alloc_extshndx
);
406 /* Look up a symbol name. */
408 bfd_elf_sym_name (bfd
*abfd
,
409 Elf_Internal_Shdr
*symtab_hdr
,
410 Elf_Internal_Sym
*isym
,
414 unsigned int iname
= isym
->st_name
;
415 unsigned int shindex
= symtab_hdr
->sh_link
;
417 if (iname
== 0 && ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
418 /* Check for a bogus st_shndx to avoid crashing. */
419 && isym
->st_shndx
< elf_numsections (abfd
)
420 && !(isym
->st_shndx
>= SHN_LORESERVE
&& isym
->st_shndx
<= SHN_HIRESERVE
))
422 iname
= elf_elfsections (abfd
)[isym
->st_shndx
]->sh_name
;
423 shindex
= elf_elfheader (abfd
)->e_shstrndx
;
426 name
= bfd_elf_string_from_elf_section (abfd
, shindex
, iname
);
429 else if (sym_sec
&& *name
== '\0')
430 name
= bfd_section_name (abfd
, sym_sec
);
435 /* Elf_Internal_Shdr->contents is an array of these for SHT_GROUP
436 sections. The first element is the flags, the rest are section
439 typedef union elf_internal_group
{
440 Elf_Internal_Shdr
*shdr
;
442 } Elf_Internal_Group
;
444 /* Return the name of the group signature symbol. Why isn't the
445 signature just a string? */
448 group_signature (bfd
*abfd
, Elf_Internal_Shdr
*ghdr
)
450 Elf_Internal_Shdr
*hdr
;
451 unsigned char esym
[sizeof (Elf64_External_Sym
)];
452 Elf_External_Sym_Shndx eshndx
;
453 Elf_Internal_Sym isym
;
455 /* First we need to ensure the symbol table is available. Make sure
456 that it is a symbol table section. */
457 hdr
= elf_elfsections (abfd
) [ghdr
->sh_link
];
458 if (hdr
->sh_type
!= SHT_SYMTAB
459 || ! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
462 /* Go read the symbol. */
463 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
464 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
465 &isym
, esym
, &eshndx
) == NULL
)
468 return bfd_elf_sym_name (abfd
, hdr
, &isym
, NULL
);
471 /* Set next_in_group list pointer, and group name for NEWSECT. */
474 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
476 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
478 /* If num_group is zero, read in all SHT_GROUP sections. The count
479 is set to -1 if there are no SHT_GROUP sections. */
482 unsigned int i
, shnum
;
484 /* First count the number of groups. If we have a SHT_GROUP
485 section with just a flag word (ie. sh_size is 4), ignore it. */
486 shnum
= elf_numsections (abfd
);
488 for (i
= 0; i
< shnum
; i
++)
490 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
491 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
497 num_group
= (unsigned) -1;
498 elf_tdata (abfd
)->num_group
= num_group
;
502 /* We keep a list of elf section headers for group sections,
503 so we can find them quickly. */
506 elf_tdata (abfd
)->num_group
= num_group
;
507 amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
508 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
509 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
513 for (i
= 0; i
< shnum
; i
++)
515 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
516 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
519 Elf_Internal_Group
*dest
;
521 /* Add to list of sections. */
522 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
525 /* Read the raw contents. */
526 BFD_ASSERT (sizeof (*dest
) >= 4);
527 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
528 shdr
->contents
= bfd_alloc (abfd
, amt
);
529 if (shdr
->contents
== NULL
530 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
531 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
535 /* Translate raw contents, a flag word followed by an
536 array of elf section indices all in target byte order,
537 to the flag word followed by an array of elf section
539 src
= shdr
->contents
+ shdr
->sh_size
;
540 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
547 idx
= H_GET_32 (abfd
, src
);
548 if (src
== shdr
->contents
)
551 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
552 shdr
->bfd_section
->flags
553 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
558 ((*_bfd_error_handler
)
559 (_("%B: invalid SHT_GROUP entry"), abfd
));
562 dest
->shdr
= elf_elfsections (abfd
)[idx
];
569 if (num_group
!= (unsigned) -1)
573 for (i
= 0; i
< num_group
; i
++)
575 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
576 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
577 unsigned int n_elt
= shdr
->sh_size
/ 4;
579 /* Look through this group's sections to see if current
580 section is a member. */
582 if ((++idx
)->shdr
== hdr
)
586 /* We are a member of this group. Go looking through
587 other members to see if any others are linked via
589 idx
= (Elf_Internal_Group
*) shdr
->contents
;
590 n_elt
= shdr
->sh_size
/ 4;
592 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
593 && elf_next_in_group (s
) != NULL
)
597 /* Snarf the group name from other member, and
598 insert current section in circular list. */
599 elf_group_name (newsect
) = elf_group_name (s
);
600 elf_next_in_group (newsect
) = elf_next_in_group (s
);
601 elf_next_in_group (s
) = newsect
;
607 gname
= group_signature (abfd
, shdr
);
610 elf_group_name (newsect
) = gname
;
612 /* Start a circular list with one element. */
613 elf_next_in_group (newsect
) = newsect
;
616 /* If the group section has been created, point to the
618 if (shdr
->bfd_section
!= NULL
)
619 elf_next_in_group (shdr
->bfd_section
) = newsect
;
627 if (elf_group_name (newsect
) == NULL
)
629 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
636 _bfd_elf_setup_group_pointers (bfd
*abfd
)
639 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
640 bfd_boolean result
= TRUE
;
642 if (num_group
== (unsigned) -1)
645 for (i
= 0; i
< num_group
; i
++)
647 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
648 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
649 unsigned int n_elt
= shdr
->sh_size
/ 4;
652 if ((++idx
)->shdr
->bfd_section
)
653 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
654 else if (idx
->shdr
->sh_type
== SHT_RELA
655 || idx
->shdr
->sh_type
== SHT_REL
)
656 /* We won't include relocation sections in section groups in
657 output object files. We adjust the group section size here
658 so that relocatable link will work correctly when
659 relocation sections are in section group in input object
661 shdr
->bfd_section
->size
-= 4;
664 /* There are some unknown sections in the group. */
665 (*_bfd_error_handler
)
666 (_("%B: unknown [%d] section `%s' in group [%s]"),
668 (unsigned int) idx
->shdr
->sh_type
,
669 bfd_elf_string_from_elf_section (abfd
,
670 (elf_elfheader (abfd
)
673 shdr
->bfd_section
->name
);
681 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
683 return elf_next_in_group (sec
) != NULL
;
686 /* Make a BFD section from an ELF section. We store a pointer to the
687 BFD section in the bfd_section field of the header. */
690 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
691 Elf_Internal_Shdr
*hdr
,
697 const struct elf_backend_data
*bed
;
699 if (hdr
->bfd_section
!= NULL
)
701 BFD_ASSERT (strcmp (name
,
702 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
706 newsect
= bfd_make_section_anyway (abfd
, name
);
710 hdr
->bfd_section
= newsect
;
711 elf_section_data (newsect
)->this_hdr
= *hdr
;
712 elf_section_data (newsect
)->this_idx
= shindex
;
714 /* Always use the real type/flags. */
715 elf_section_type (newsect
) = hdr
->sh_type
;
716 elf_section_flags (newsect
) = hdr
->sh_flags
;
718 newsect
->filepos
= hdr
->sh_offset
;
720 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
721 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
722 || ! bfd_set_section_alignment (abfd
, newsect
,
723 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
726 flags
= SEC_NO_FLAGS
;
727 if (hdr
->sh_type
!= SHT_NOBITS
)
728 flags
|= SEC_HAS_CONTENTS
;
729 if (hdr
->sh_type
== SHT_GROUP
)
730 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
731 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
734 if (hdr
->sh_type
!= SHT_NOBITS
)
737 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
738 flags
|= SEC_READONLY
;
739 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
741 else if ((flags
& SEC_LOAD
) != 0)
743 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
746 newsect
->entsize
= hdr
->sh_entsize
;
747 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
748 flags
|= SEC_STRINGS
;
750 if (hdr
->sh_flags
& SHF_GROUP
)
751 if (!setup_group (abfd
, hdr
, newsect
))
753 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
754 flags
|= SEC_THREAD_LOCAL
;
756 if ((flags
& SEC_ALLOC
) == 0)
758 /* The debugging sections appear to be recognized only by name,
759 not any sort of flag. Their SEC_ALLOC bits are cleared. */
764 } debug_sections
[] =
766 { "debug", 5 }, /* 'd' */
767 { NULL
, 0 }, /* 'e' */
768 { NULL
, 0 }, /* 'f' */
769 { "gnu.linkonce.wi.", 17 }, /* 'g' */
770 { NULL
, 0 }, /* 'h' */
771 { NULL
, 0 }, /* 'i' */
772 { NULL
, 0 }, /* 'j' */
773 { NULL
, 0 }, /* 'k' */
774 { "line", 4 }, /* 'l' */
775 { NULL
, 0 }, /* 'm' */
776 { NULL
, 0 }, /* 'n' */
777 { NULL
, 0 }, /* 'o' */
778 { NULL
, 0 }, /* 'p' */
779 { NULL
, 0 }, /* 'q' */
780 { NULL
, 0 }, /* 'r' */
781 { "stab", 4 } /* 's' */
786 int i
= name
[1] - 'd';
788 && i
< (int) ARRAY_SIZE (debug_sections
)
789 && debug_sections
[i
].name
!= NULL
790 && strncmp (&name
[1], debug_sections
[i
].name
,
791 debug_sections
[i
].len
) == 0)
792 flags
|= SEC_DEBUGGING
;
796 /* As a GNU extension, if the name begins with .gnu.linkonce, we
797 only link a single copy of the section. This is used to support
798 g++. g++ will emit each template expansion in its own section.
799 The symbols will be defined as weak, so that multiple definitions
800 are permitted. The GNU linker extension is to actually discard
801 all but one of the sections. */
802 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
803 && elf_next_in_group (newsect
) == NULL
)
804 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
806 bed
= get_elf_backend_data (abfd
);
807 if (bed
->elf_backend_section_flags
)
808 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
811 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
814 if ((flags
& SEC_ALLOC
) != 0)
816 Elf_Internal_Phdr
*phdr
;
819 /* Look through the phdrs to see if we need to adjust the lma.
820 If all the p_paddr fields are zero, we ignore them, since
821 some ELF linkers produce such output. */
822 phdr
= elf_tdata (abfd
)->phdr
;
823 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
825 if (phdr
->p_paddr
!= 0)
828 if (i
< elf_elfheader (abfd
)->e_phnum
)
830 phdr
= elf_tdata (abfd
)->phdr
;
831 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
833 /* This section is part of this segment if its file
834 offset plus size lies within the segment's memory
835 span and, if the section is loaded, the extent of the
836 loaded data lies within the extent of the segment.
838 Note - we used to check the p_paddr field as well, and
839 refuse to set the LMA if it was 0. This is wrong
840 though, as a perfectly valid initialised segment can
841 have a p_paddr of zero. Some architectures, eg ARM,
842 place special significance on the address 0 and
843 executables need to be able to have a segment which
844 covers this address. */
845 if (phdr
->p_type
== PT_LOAD
846 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
847 && (hdr
->sh_offset
+ hdr
->sh_size
848 <= phdr
->p_offset
+ phdr
->p_memsz
)
849 && ((flags
& SEC_LOAD
) == 0
850 || (hdr
->sh_offset
+ hdr
->sh_size
851 <= phdr
->p_offset
+ phdr
->p_filesz
)))
853 if ((flags
& SEC_LOAD
) == 0)
854 newsect
->lma
= (phdr
->p_paddr
855 + hdr
->sh_addr
- phdr
->p_vaddr
);
857 /* We used to use the same adjustment for SEC_LOAD
858 sections, but that doesn't work if the segment
859 is packed with code from multiple VMAs.
860 Instead we calculate the section LMA based on
861 the segment LMA. It is assumed that the
862 segment will contain sections with contiguous
863 LMAs, even if the VMAs are not. */
864 newsect
->lma
= (phdr
->p_paddr
865 + hdr
->sh_offset
- phdr
->p_offset
);
867 /* With contiguous segments, we can't tell from file
868 offsets whether a section with zero size should
869 be placed at the end of one segment or the
870 beginning of the next. Decide based on vaddr. */
871 if (hdr
->sh_addr
>= phdr
->p_vaddr
872 && (hdr
->sh_addr
+ hdr
->sh_size
873 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
888 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
891 Helper functions for GDB to locate the string tables.
892 Since BFD hides string tables from callers, GDB needs to use an
893 internal hook to find them. Sun's .stabstr, in particular,
894 isn't even pointed to by the .stab section, so ordinary
895 mechanisms wouldn't work to find it, even if we had some.
898 struct elf_internal_shdr
*
899 bfd_elf_find_section (bfd
*abfd
, char *name
)
901 Elf_Internal_Shdr
**i_shdrp
;
906 i_shdrp
= elf_elfsections (abfd
);
909 shstrtab
= bfd_elf_get_str_section (abfd
,
910 elf_elfheader (abfd
)->e_shstrndx
);
911 if (shstrtab
!= NULL
)
913 max
= elf_numsections (abfd
);
914 for (i
= 1; i
< max
; i
++)
915 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
922 const char *const bfd_elf_section_type_names
[] = {
923 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
924 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
925 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
928 /* ELF relocs are against symbols. If we are producing relocatable
929 output, and the reloc is against an external symbol, and nothing
930 has given us any additional addend, the resulting reloc will also
931 be against the same symbol. In such a case, we don't want to
932 change anything about the way the reloc is handled, since it will
933 all be done at final link time. Rather than put special case code
934 into bfd_perform_relocation, all the reloc types use this howto
935 function. It just short circuits the reloc if producing
936 relocatable output against an external symbol. */
938 bfd_reloc_status_type
939 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
940 arelent
*reloc_entry
,
942 void *data ATTRIBUTE_UNUSED
,
943 asection
*input_section
,
945 char **error_message ATTRIBUTE_UNUSED
)
947 if (output_bfd
!= NULL
948 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
949 && (! reloc_entry
->howto
->partial_inplace
950 || reloc_entry
->addend
== 0))
952 reloc_entry
->address
+= input_section
->output_offset
;
956 return bfd_reloc_continue
;
959 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
962 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
965 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
966 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
969 /* Finish SHF_MERGE section merging. */
972 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
977 if (!is_elf_hash_table (info
->hash
))
980 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
981 if ((ibfd
->flags
& DYNAMIC
) == 0)
982 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
983 if ((sec
->flags
& SEC_MERGE
) != 0
984 && !bfd_is_abs_section (sec
->output_section
))
986 struct bfd_elf_section_data
*secdata
;
988 secdata
= elf_section_data (sec
);
989 if (! _bfd_add_merge_section (abfd
,
990 &elf_hash_table (info
)->merge_info
,
991 sec
, &secdata
->sec_info
))
993 else if (secdata
->sec_info
)
994 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
997 if (elf_hash_table (info
)->merge_info
!= NULL
)
998 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
999 merge_sections_remove_hook
);
1004 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
1006 sec
->output_section
= bfd_abs_section_ptr
;
1007 sec
->output_offset
= sec
->vma
;
1008 if (!is_elf_hash_table (info
->hash
))
1011 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
1014 /* Copy the program header and other data from one object module to
1018 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
1020 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
1021 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1024 BFD_ASSERT (!elf_flags_init (obfd
)
1025 || (elf_elfheader (obfd
)->e_flags
1026 == elf_elfheader (ibfd
)->e_flags
));
1028 elf_gp (obfd
) = elf_gp (ibfd
);
1029 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1030 elf_flags_init (obfd
) = TRUE
;
1034 /* Print out the program headers. */
1037 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1040 Elf_Internal_Phdr
*p
;
1042 bfd_byte
*dynbuf
= NULL
;
1044 p
= elf_tdata (abfd
)->phdr
;
1049 fprintf (f
, _("\nProgram Header:\n"));
1050 c
= elf_elfheader (abfd
)->e_phnum
;
1051 for (i
= 0; i
< c
; i
++, p
++)
1058 case PT_NULL
: pt
= "NULL"; break;
1059 case PT_LOAD
: pt
= "LOAD"; break;
1060 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1061 case PT_INTERP
: pt
= "INTERP"; break;
1062 case PT_NOTE
: pt
= "NOTE"; break;
1063 case PT_SHLIB
: pt
= "SHLIB"; break;
1064 case PT_PHDR
: pt
= "PHDR"; break;
1065 case PT_TLS
: pt
= "TLS"; break;
1066 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1067 case PT_GNU_STACK
: pt
= "STACK"; break;
1068 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1069 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1071 fprintf (f
, "%8s off 0x", pt
);
1072 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1073 fprintf (f
, " vaddr 0x");
1074 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1075 fprintf (f
, " paddr 0x");
1076 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1077 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1078 fprintf (f
, " filesz 0x");
1079 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1080 fprintf (f
, " memsz 0x");
1081 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1082 fprintf (f
, " flags %c%c%c",
1083 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1084 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1085 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1086 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1087 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1092 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1096 unsigned long shlink
;
1097 bfd_byte
*extdyn
, *extdynend
;
1099 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1101 fprintf (f
, _("\nDynamic Section:\n"));
1103 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1106 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1109 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1111 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1112 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1115 extdynend
= extdyn
+ s
->size
;
1116 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1118 Elf_Internal_Dyn dyn
;
1121 bfd_boolean stringp
;
1123 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1125 if (dyn
.d_tag
== DT_NULL
)
1132 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1136 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1137 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1138 case DT_PLTGOT
: name
= "PLTGOT"; break;
1139 case DT_HASH
: name
= "HASH"; break;
1140 case DT_STRTAB
: name
= "STRTAB"; break;
1141 case DT_SYMTAB
: name
= "SYMTAB"; break;
1142 case DT_RELA
: name
= "RELA"; break;
1143 case DT_RELASZ
: name
= "RELASZ"; break;
1144 case DT_RELAENT
: name
= "RELAENT"; break;
1145 case DT_STRSZ
: name
= "STRSZ"; break;
1146 case DT_SYMENT
: name
= "SYMENT"; break;
1147 case DT_INIT
: name
= "INIT"; break;
1148 case DT_FINI
: name
= "FINI"; break;
1149 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1150 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1151 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1152 case DT_REL
: name
= "REL"; break;
1153 case DT_RELSZ
: name
= "RELSZ"; break;
1154 case DT_RELENT
: name
= "RELENT"; break;
1155 case DT_PLTREL
: name
= "PLTREL"; break;
1156 case DT_DEBUG
: name
= "DEBUG"; break;
1157 case DT_TEXTREL
: name
= "TEXTREL"; break;
1158 case DT_JMPREL
: name
= "JMPREL"; break;
1159 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1160 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1161 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1162 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1163 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1164 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1165 case DT_FLAGS
: name
= "FLAGS"; break;
1166 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1167 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1168 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1169 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1170 case DT_MOVEENT
: name
= "MOVEENT"; break;
1171 case DT_MOVESZ
: name
= "MOVESZ"; break;
1172 case DT_FEATURE
: name
= "FEATURE"; break;
1173 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1174 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1175 case DT_SYMINENT
: name
= "SYMINENT"; break;
1176 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1177 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1178 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1179 case DT_PLTPAD
: name
= "PLTPAD"; break;
1180 case DT_MOVETAB
: name
= "MOVETAB"; break;
1181 case DT_SYMINFO
: name
= "SYMINFO"; break;
1182 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1183 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1184 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1185 case DT_VERSYM
: name
= "VERSYM"; break;
1186 case DT_VERDEF
: name
= "VERDEF"; break;
1187 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1188 case DT_VERNEED
: name
= "VERNEED"; break;
1189 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1190 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1191 case DT_USED
: name
= "USED"; break;
1192 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1195 fprintf (f
, " %-11s ", name
);
1197 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1201 unsigned int tagv
= dyn
.d_un
.d_val
;
1203 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1206 fprintf (f
, "%s", string
);
1215 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1216 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1218 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1222 if (elf_dynverdef (abfd
) != 0)
1224 Elf_Internal_Verdef
*t
;
1226 fprintf (f
, _("\nVersion definitions:\n"));
1227 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1229 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1230 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1231 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1233 Elf_Internal_Verdaux
*a
;
1236 for (a
= t
->vd_auxptr
->vda_nextptr
;
1239 fprintf (f
, "%s ", a
->vda_nodename
);
1245 if (elf_dynverref (abfd
) != 0)
1247 Elf_Internal_Verneed
*t
;
1249 fprintf (f
, _("\nVersion References:\n"));
1250 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1252 Elf_Internal_Vernaux
*a
;
1254 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1255 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1256 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1257 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1269 /* Display ELF-specific fields of a symbol. */
1272 bfd_elf_print_symbol (bfd
*abfd
,
1275 bfd_print_symbol_type how
)
1280 case bfd_print_symbol_name
:
1281 fprintf (file
, "%s", symbol
->name
);
1283 case bfd_print_symbol_more
:
1284 fprintf (file
, "elf ");
1285 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1286 fprintf (file
, " %lx", (long) symbol
->flags
);
1288 case bfd_print_symbol_all
:
1290 const char *section_name
;
1291 const char *name
= NULL
;
1292 const struct elf_backend_data
*bed
;
1293 unsigned char st_other
;
1296 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1298 bed
= get_elf_backend_data (abfd
);
1299 if (bed
->elf_backend_print_symbol_all
)
1300 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1304 name
= symbol
->name
;
1305 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1308 fprintf (file
, " %s\t", section_name
);
1309 /* Print the "other" value for a symbol. For common symbols,
1310 we've already printed the size; now print the alignment.
1311 For other symbols, we have no specified alignment, and
1312 we've printed the address; now print the size. */
1313 if (bfd_is_com_section (symbol
->section
))
1314 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1316 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1317 bfd_fprintf_vma (abfd
, file
, val
);
1319 /* If we have version information, print it. */
1320 if (elf_tdata (abfd
)->dynversym_section
!= 0
1321 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1322 || elf_tdata (abfd
)->dynverref_section
!= 0))
1324 unsigned int vernum
;
1325 const char *version_string
;
1327 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1330 version_string
= "";
1331 else if (vernum
== 1)
1332 version_string
= "Base";
1333 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1335 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1338 Elf_Internal_Verneed
*t
;
1340 version_string
= "";
1341 for (t
= elf_tdata (abfd
)->verref
;
1345 Elf_Internal_Vernaux
*a
;
1347 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1349 if (a
->vna_other
== vernum
)
1351 version_string
= a
->vna_nodename
;
1358 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1359 fprintf (file
, " %-11s", version_string
);
1364 fprintf (file
, " (%s)", version_string
);
1365 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1370 /* If the st_other field is not zero, print it. */
1371 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1376 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1377 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1378 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1380 /* Some other non-defined flags are also present, so print
1382 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1385 fprintf (file
, " %s", name
);
1391 /* Create an entry in an ELF linker hash table. */
1393 struct bfd_hash_entry
*
1394 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1395 struct bfd_hash_table
*table
,
1398 /* Allocate the structure if it has not already been allocated by a
1402 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1407 /* Call the allocation method of the superclass. */
1408 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1411 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1412 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1414 /* Set local fields. */
1417 ret
->got
= htab
->init_got_refcount
;
1418 ret
->plt
= htab
->init_plt_refcount
;
1419 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1420 - offsetof (struct elf_link_hash_entry
, size
)));
1421 /* Assume that we have been called by a non-ELF symbol reader.
1422 This flag is then reset by the code which reads an ELF input
1423 file. This ensures that a symbol created by a non-ELF symbol
1424 reader will have the flag set correctly. */
1431 /* Copy data from an indirect symbol to its direct symbol, hiding the
1432 old indirect symbol. Also used for copying flags to a weakdef. */
1435 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1436 struct elf_link_hash_entry
*dir
,
1437 struct elf_link_hash_entry
*ind
)
1440 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1442 /* Copy down any references that we may have already seen to the
1443 symbol which just became indirect. */
1445 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1446 dir
->ref_regular
|= ind
->ref_regular
;
1447 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1448 dir
->non_got_ref
|= ind
->non_got_ref
;
1449 dir
->needs_plt
|= ind
->needs_plt
;
1450 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1452 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1455 /* Copy over the global and procedure linkage table refcount entries.
1456 These may have been already set up by a check_relocs routine. */
1457 tmp
= dir
->got
.refcount
;
1458 if (tmp
< lowest_valid
)
1460 dir
->got
.refcount
= ind
->got
.refcount
;
1461 ind
->got
.refcount
= tmp
;
1464 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1466 tmp
= dir
->plt
.refcount
;
1467 if (tmp
< lowest_valid
)
1469 dir
->plt
.refcount
= ind
->plt
.refcount
;
1470 ind
->plt
.refcount
= tmp
;
1473 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1475 if (dir
->dynindx
== -1)
1477 dir
->dynindx
= ind
->dynindx
;
1478 dir
->dynstr_index
= ind
->dynstr_index
;
1480 ind
->dynstr_index
= 0;
1483 BFD_ASSERT (ind
->dynindx
== -1);
1487 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1488 struct elf_link_hash_entry
*h
,
1489 bfd_boolean force_local
)
1491 h
->plt
= elf_hash_table (info
)->init_plt_offset
;
1495 h
->forced_local
= 1;
1496 if (h
->dynindx
!= -1)
1499 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1505 /* Initialize an ELF linker hash table. */
1508 _bfd_elf_link_hash_table_init
1509 (struct elf_link_hash_table
*table
,
1511 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1512 struct bfd_hash_table
*,
1516 int can_refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1518 table
->dynamic_sections_created
= FALSE
;
1519 table
->dynobj
= NULL
;
1520 table
->init_got_refcount
.refcount
= can_refcount
- 1;
1521 table
->init_plt_refcount
.refcount
= can_refcount
- 1;
1522 table
->init_got_offset
.offset
= -(bfd_vma
) 1;
1523 table
->init_plt_offset
.offset
= -(bfd_vma
) 1;
1524 /* The first dynamic symbol is a dummy. */
1525 table
->dynsymcount
= 1;
1526 table
->dynstr
= NULL
;
1527 table
->bucketcount
= 0;
1528 table
->needed
= NULL
;
1530 table
->merge_info
= NULL
;
1531 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1532 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1533 table
->dynlocal
= NULL
;
1534 table
->runpath
= NULL
;
1535 table
->tls_sec
= NULL
;
1536 table
->tls_size
= 0;
1537 table
->loaded
= NULL
;
1538 table
->is_relocatable_executable
= FALSE
;
1540 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1541 table
->root
.type
= bfd_link_elf_hash_table
;
1546 /* Create an ELF linker hash table. */
1548 struct bfd_link_hash_table
*
1549 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1551 struct elf_link_hash_table
*ret
;
1552 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1554 ret
= bfd_malloc (amt
);
1558 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1567 /* This is a hook for the ELF emulation code in the generic linker to
1568 tell the backend linker what file name to use for the DT_NEEDED
1569 entry for a dynamic object. */
1572 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1574 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1575 && bfd_get_format (abfd
) == bfd_object
)
1576 elf_dt_name (abfd
) = name
;
1580 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1583 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1584 && bfd_get_format (abfd
) == bfd_object
)
1585 lib_class
= elf_dyn_lib_class (abfd
);
1592 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1594 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1595 && bfd_get_format (abfd
) == bfd_object
)
1596 elf_dyn_lib_class (abfd
) = lib_class
;
1599 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1600 the linker ELF emulation code. */
1602 struct bfd_link_needed_list
*
1603 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1604 struct bfd_link_info
*info
)
1606 if (! is_elf_hash_table (info
->hash
))
1608 return elf_hash_table (info
)->needed
;
1611 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1612 hook for the linker ELF emulation code. */
1614 struct bfd_link_needed_list
*
1615 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1616 struct bfd_link_info
*info
)
1618 if (! is_elf_hash_table (info
->hash
))
1620 return elf_hash_table (info
)->runpath
;
1623 /* Get the name actually used for a dynamic object for a link. This
1624 is the SONAME entry if there is one. Otherwise, it is the string
1625 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1628 bfd_elf_get_dt_soname (bfd
*abfd
)
1630 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1631 && bfd_get_format (abfd
) == bfd_object
)
1632 return elf_dt_name (abfd
);
1636 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1637 the ELF linker emulation code. */
1640 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1641 struct bfd_link_needed_list
**pneeded
)
1644 bfd_byte
*dynbuf
= NULL
;
1646 unsigned long shlink
;
1647 bfd_byte
*extdyn
, *extdynend
;
1649 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1653 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1654 || bfd_get_format (abfd
) != bfd_object
)
1657 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1658 if (s
== NULL
|| s
->size
== 0)
1661 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1664 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1668 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1670 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1671 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1674 extdynend
= extdyn
+ s
->size
;
1675 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1677 Elf_Internal_Dyn dyn
;
1679 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1681 if (dyn
.d_tag
== DT_NULL
)
1684 if (dyn
.d_tag
== DT_NEEDED
)
1687 struct bfd_link_needed_list
*l
;
1688 unsigned int tagv
= dyn
.d_un
.d_val
;
1691 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1696 l
= bfd_alloc (abfd
, amt
);
1717 /* Allocate an ELF string table--force the first byte to be zero. */
1719 struct bfd_strtab_hash
*
1720 _bfd_elf_stringtab_init (void)
1722 struct bfd_strtab_hash
*ret
;
1724 ret
= _bfd_stringtab_init ();
1729 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1730 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1731 if (loc
== (bfd_size_type
) -1)
1733 _bfd_stringtab_free (ret
);
1740 /* ELF .o/exec file reading */
1742 /* Create a new bfd section from an ELF section header. */
1745 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1747 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1748 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1749 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1752 name
= bfd_elf_string_from_elf_section (abfd
,
1753 elf_elfheader (abfd
)->e_shstrndx
,
1758 switch (hdr
->sh_type
)
1761 /* Inactive section. Throw it away. */
1764 case SHT_PROGBITS
: /* Normal section with contents. */
1765 case SHT_NOBITS
: /* .bss section. */
1766 case SHT_HASH
: /* .hash section. */
1767 case SHT_NOTE
: /* .note section. */
1768 case SHT_INIT_ARRAY
: /* .init_array section. */
1769 case SHT_FINI_ARRAY
: /* .fini_array section. */
1770 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1771 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1772 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1774 case SHT_DYNAMIC
: /* Dynamic linking information. */
1775 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1777 if (hdr
->sh_link
> elf_numsections (abfd
)
1778 || elf_elfsections (abfd
)[hdr
->sh_link
] == NULL
)
1780 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1782 Elf_Internal_Shdr
*dynsymhdr
;
1784 /* The shared libraries distributed with hpux11 have a bogus
1785 sh_link field for the ".dynamic" section. Find the
1786 string table for the ".dynsym" section instead. */
1787 if (elf_dynsymtab (abfd
) != 0)
1789 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1790 hdr
->sh_link
= dynsymhdr
->sh_link
;
1794 unsigned int i
, num_sec
;
1796 num_sec
= elf_numsections (abfd
);
1797 for (i
= 1; i
< num_sec
; i
++)
1799 dynsymhdr
= elf_elfsections (abfd
)[i
];
1800 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1802 hdr
->sh_link
= dynsymhdr
->sh_link
;
1810 case SHT_SYMTAB
: /* A symbol table */
1811 if (elf_onesymtab (abfd
) == shindex
)
1814 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1816 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1817 elf_onesymtab (abfd
) = shindex
;
1818 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1819 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1820 abfd
->flags
|= HAS_SYMS
;
1822 /* Sometimes a shared object will map in the symbol table. If
1823 SHF_ALLOC is set, and this is a shared object, then we also
1824 treat this section as a BFD section. We can not base the
1825 decision purely on SHF_ALLOC, because that flag is sometimes
1826 set in a relocatable object file, which would confuse the
1828 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1829 && (abfd
->flags
& DYNAMIC
) != 0
1830 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1834 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1835 can't read symbols without that section loaded as well. It
1836 is most likely specified by the next section header. */
1837 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1839 unsigned int i
, num_sec
;
1841 num_sec
= elf_numsections (abfd
);
1842 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1844 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1845 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1846 && hdr2
->sh_link
== shindex
)
1850 for (i
= 1; i
< shindex
; i
++)
1852 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1853 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1854 && hdr2
->sh_link
== shindex
)
1858 return bfd_section_from_shdr (abfd
, i
);
1862 case SHT_DYNSYM
: /* A dynamic symbol table */
1863 if (elf_dynsymtab (abfd
) == shindex
)
1866 if (hdr
->sh_entsize
!= bed
->s
->sizeof_sym
)
1868 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1869 elf_dynsymtab (abfd
) = shindex
;
1870 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1871 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1872 abfd
->flags
|= HAS_SYMS
;
1874 /* Besides being a symbol table, we also treat this as a regular
1875 section, so that objcopy can handle it. */
1876 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1878 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1879 if (elf_symtab_shndx (abfd
) == shindex
)
1882 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1883 elf_symtab_shndx (abfd
) = shindex
;
1884 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1885 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1888 case SHT_STRTAB
: /* A string table */
1889 if (hdr
->bfd_section
!= NULL
)
1891 if (ehdr
->e_shstrndx
== shindex
)
1893 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1894 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1897 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1900 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1901 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1904 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1907 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1908 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1909 elf_elfsections (abfd
)[shindex
] = hdr
;
1910 /* We also treat this as a regular section, so that objcopy
1912 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1916 /* If the string table isn't one of the above, then treat it as a
1917 regular section. We need to scan all the headers to be sure,
1918 just in case this strtab section appeared before the above. */
1919 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1921 unsigned int i
, num_sec
;
1923 num_sec
= elf_numsections (abfd
);
1924 for (i
= 1; i
< num_sec
; i
++)
1926 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1927 if (hdr2
->sh_link
== shindex
)
1929 /* Prevent endless recursion on broken objects. */
1932 if (! bfd_section_from_shdr (abfd
, i
))
1934 if (elf_onesymtab (abfd
) == i
)
1936 if (elf_dynsymtab (abfd
) == i
)
1937 goto dynsymtab_strtab
;
1941 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1945 /* *These* do a lot of work -- but build no sections! */
1947 asection
*target_sect
;
1948 Elf_Internal_Shdr
*hdr2
;
1949 unsigned int num_sec
= elf_numsections (abfd
);
1951 if (hdr
->sh_entsize
!= (hdr
->sh_type
== SHT_REL
1952 ? bed
->s
->sizeof_rel
: bed
->s
->sizeof_rela
))
1955 /* Check for a bogus link to avoid crashing. */
1956 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1957 || hdr
->sh_link
>= num_sec
)
1959 ((*_bfd_error_handler
)
1960 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1961 abfd
, hdr
->sh_link
, name
, shindex
));
1962 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1966 /* For some incomprehensible reason Oracle distributes
1967 libraries for Solaris in which some of the objects have
1968 bogus sh_link fields. It would be nice if we could just
1969 reject them, but, unfortunately, some people need to use
1970 them. We scan through the section headers; if we find only
1971 one suitable symbol table, we clobber the sh_link to point
1972 to it. I hope this doesn't break anything. */
1973 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1974 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1980 for (scan
= 1; scan
< num_sec
; scan
++)
1982 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1983 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1994 hdr
->sh_link
= found
;
1997 /* Get the symbol table. */
1998 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1999 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
2000 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
2003 /* If this reloc section does not use the main symbol table we
2004 don't treat it as a reloc section. BFD can't adequately
2005 represent such a section, so at least for now, we don't
2006 try. We just present it as a normal section. We also
2007 can't use it as a reloc section if it points to the null
2009 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
2010 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
2013 /* Prevent endless recursion on broken objects. */
2014 if (elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_REL
2015 || elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_RELA
)
2017 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
2019 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
2020 if (target_sect
== NULL
)
2023 if ((target_sect
->flags
& SEC_RELOC
) == 0
2024 || target_sect
->reloc_count
== 0)
2025 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
2029 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
2030 amt
= sizeof (*hdr2
);
2031 hdr2
= bfd_alloc (abfd
, amt
);
2032 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
2035 elf_elfsections (abfd
)[shindex
] = hdr2
;
2036 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
2037 target_sect
->flags
|= SEC_RELOC
;
2038 target_sect
->relocation
= NULL
;
2039 target_sect
->rel_filepos
= hdr
->sh_offset
;
2040 /* In the section to which the relocations apply, mark whether
2041 its relocations are of the REL or RELA variety. */
2042 if (hdr
->sh_size
!= 0)
2043 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2044 abfd
->flags
|= HAS_RELOC
;
2049 case SHT_GNU_verdef
:
2050 elf_dynverdef (abfd
) = shindex
;
2051 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2052 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2055 case SHT_GNU_versym
:
2056 if (hdr
->sh_entsize
!= sizeof (Elf_External_Versym
))
2058 elf_dynversym (abfd
) = shindex
;
2059 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2060 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2063 case SHT_GNU_verneed
:
2064 elf_dynverref (abfd
) = shindex
;
2065 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2066 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2073 /* We need a BFD section for objcopy and relocatable linking,
2074 and it's handy to have the signature available as the section
2076 if (hdr
->sh_entsize
!= GRP_ENTRY_SIZE
)
2078 name
= group_signature (abfd
, hdr
);
2081 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2083 if (hdr
->contents
!= NULL
)
2085 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2086 unsigned int n_elt
= hdr
->sh_size
/ 4;
2089 if (idx
->flags
& GRP_COMDAT
)
2090 hdr
->bfd_section
->flags
2091 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2093 /* We try to keep the same section order as it comes in. */
2095 while (--n_elt
!= 0)
2096 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2097 && elf_next_in_group (s
) != NULL
)
2099 elf_next_in_group (hdr
->bfd_section
) = s
;
2106 /* Check for any processor-specific section types. */
2107 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2114 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2115 Return SEC for sections that have no elf section, and NULL on error. */
2118 bfd_section_from_r_symndx (bfd
*abfd
,
2119 struct sym_sec_cache
*cache
,
2121 unsigned long r_symndx
)
2123 Elf_Internal_Shdr
*symtab_hdr
;
2124 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2125 Elf_External_Sym_Shndx eshndx
;
2126 Elf_Internal_Sym isym
;
2127 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2129 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2130 return cache
->sec
[ent
];
2132 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2133 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2134 &isym
, esym
, &eshndx
) == NULL
)
2137 if (cache
->abfd
!= abfd
)
2139 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2142 cache
->indx
[ent
] = r_symndx
;
2143 cache
->sec
[ent
] = sec
;
2144 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2145 || isym
.st_shndx
> SHN_HIRESERVE
)
2148 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2150 cache
->sec
[ent
] = s
;
2152 return cache
->sec
[ent
];
2155 /* Given an ELF section number, retrieve the corresponding BFD
2159 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2161 if (index
>= elf_numsections (abfd
))
2163 return elf_elfsections (abfd
)[index
]->bfd_section
;
2166 static struct bfd_elf_special_section
const special_sections_b
[] =
2168 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2169 { NULL
, 0, 0, 0, 0 }
2172 static struct bfd_elf_special_section
const special_sections_c
[] =
2174 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2175 { NULL
, 0, 0, 0, 0 }
2178 static struct bfd_elf_special_section
const special_sections_d
[] =
2180 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2181 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2182 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2183 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2184 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2185 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2186 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2187 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2188 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2189 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2190 { NULL
, 0, 0, 0, 0 }
2193 static struct bfd_elf_special_section
const special_sections_f
[] =
2195 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2196 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2197 { NULL
, 0, 0, 0, 0 }
2200 static struct bfd_elf_special_section
const special_sections_g
[] =
2202 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2203 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2204 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2205 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2206 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2207 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2208 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2209 { NULL
, 0, 0, 0, 0 }
2212 static struct bfd_elf_special_section
const special_sections_h
[] =
2214 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2215 { NULL
, 0, 0, 0, 0 }
2218 static struct bfd_elf_special_section
const special_sections_i
[] =
2220 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2221 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2222 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2223 { NULL
, 0, 0, 0, 0 }
2226 static struct bfd_elf_special_section
const special_sections_l
[] =
2228 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2229 { NULL
, 0, 0, 0, 0 }
2232 static struct bfd_elf_special_section
const special_sections_n
[] =
2234 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2235 { ".note", 5, -1, SHT_NOTE
, 0 },
2236 { NULL
, 0, 0, 0, 0 }
2239 static struct bfd_elf_special_section
const special_sections_p
[] =
2241 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2242 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2243 { NULL
, 0, 0, 0, 0 }
2246 static struct bfd_elf_special_section
const special_sections_r
[] =
2248 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2249 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2250 { ".rela", 5, -1, SHT_RELA
, 0 },
2251 { ".rel", 4, -1, SHT_REL
, 0 },
2252 { NULL
, 0, 0, 0, 0 }
2255 static struct bfd_elf_special_section
const special_sections_s
[] =
2257 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2258 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2259 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2260 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2261 { NULL
, 0, 0, 0, 0 }
2264 static struct bfd_elf_special_section
const special_sections_t
[] =
2266 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2267 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2268 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2269 { NULL
, 0, 0, 0, 0 }
2272 static struct bfd_elf_special_section
const *special_sections
[27] =
2275 special_sections_b
, /* 'b' */
2276 special_sections_c
, /* 'b' */
2277 special_sections_d
, /* 'd' */
2279 special_sections_f
, /* 'f' */
2280 special_sections_g
, /* 'g' */
2281 special_sections_h
, /* 'h' */
2282 special_sections_i
, /* 'i' */
2285 special_sections_l
, /* 'l' */
2287 special_sections_n
, /* 'n' */
2289 special_sections_p
, /* 'p' */
2291 special_sections_r
, /* 'r' */
2292 special_sections_s
, /* 's' */
2293 special_sections_t
, /* 't' */
2303 static const struct bfd_elf_special_section
*
2304 get_special_section (const char *name
,
2305 const struct bfd_elf_special_section
**special_sections_p
,
2310 const struct bfd_elf_special_section
*special_sections
;
2312 if (name
[0] == '.')
2315 if (i
< 0 || i
> 25)
2321 special_sections
= special_sections_p
[i
];
2323 if (!special_sections
)
2324 return special_sections
;
2328 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2331 int prefix_len
= special_sections
[i
].prefix_length
;
2333 if (len
< prefix_len
)
2335 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2338 suffix_len
= special_sections
[i
].suffix_length
;
2339 if (suffix_len
<= 0)
2341 if (name
[prefix_len
] != 0)
2343 if (suffix_len
== 0)
2345 if (name
[prefix_len
] != '.'
2346 && (suffix_len
== -2
2347 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2353 if (len
< prefix_len
+ suffix_len
)
2355 if (memcmp (name
+ len
- suffix_len
,
2356 special_sections
[i
].prefix
+ prefix_len
,
2360 return &special_sections
[i
];
2366 const struct bfd_elf_special_section
*
2367 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2369 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2370 const struct bfd_elf_special_section
*ssect
= NULL
;
2372 /* See if this is one of the special sections. */
2375 unsigned int rela
= bed
->default_use_rela_p
;
2377 if (bed
->special_sections
)
2378 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2381 ssect
= get_special_section (name
, special_sections
, rela
);
2388 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2390 struct bfd_elf_section_data
*sdata
;
2391 const struct bfd_elf_special_section
*ssect
;
2393 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2396 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2399 sec
->used_by_bfd
= sdata
;
2402 /* When we read a file, we don't need section type and flags unless
2403 it is a linker created section. They will be overridden in
2404 _bfd_elf_make_section_from_shdr anyway. */
2405 if (abfd
->direction
!= read_direction
2406 || (sec
->flags
& SEC_LINKER_CREATED
) != 0)
2408 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2411 elf_section_type (sec
) = ssect
->type
;
2412 elf_section_flags (sec
) = ssect
->attr
;
2416 /* Indicate whether or not this section should use RELA relocations. */
2417 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2422 /* Create a new bfd section from an ELF program header.
2424 Since program segments have no names, we generate a synthetic name
2425 of the form segment<NUM>, where NUM is generally the index in the
2426 program header table. For segments that are split (see below) we
2427 generate the names segment<NUM>a and segment<NUM>b.
2429 Note that some program segments may have a file size that is different than
2430 (less than) the memory size. All this means is that at execution the
2431 system must allocate the amount of memory specified by the memory size,
2432 but only initialize it with the first "file size" bytes read from the
2433 file. This would occur for example, with program segments consisting
2434 of combined data+bss.
2436 To handle the above situation, this routine generates TWO bfd sections
2437 for the single program segment. The first has the length specified by
2438 the file size of the segment, and the second has the length specified
2439 by the difference between the two sizes. In effect, the segment is split
2440 into it's initialized and uninitialized parts.
2445 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2446 Elf_Internal_Phdr
*hdr
,
2448 const char *typename
)
2456 split
= ((hdr
->p_memsz
> 0)
2457 && (hdr
->p_filesz
> 0)
2458 && (hdr
->p_memsz
> hdr
->p_filesz
));
2459 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2460 len
= strlen (namebuf
) + 1;
2461 name
= bfd_alloc (abfd
, len
);
2464 memcpy (name
, namebuf
, len
);
2465 newsect
= bfd_make_section (abfd
, name
);
2466 if (newsect
== NULL
)
2468 newsect
->vma
= hdr
->p_vaddr
;
2469 newsect
->lma
= hdr
->p_paddr
;
2470 newsect
->size
= hdr
->p_filesz
;
2471 newsect
->filepos
= hdr
->p_offset
;
2472 newsect
->flags
|= SEC_HAS_CONTENTS
;
2473 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2474 if (hdr
->p_type
== PT_LOAD
)
2476 newsect
->flags
|= SEC_ALLOC
;
2477 newsect
->flags
|= SEC_LOAD
;
2478 if (hdr
->p_flags
& PF_X
)
2480 /* FIXME: all we known is that it has execute PERMISSION,
2482 newsect
->flags
|= SEC_CODE
;
2485 if (!(hdr
->p_flags
& PF_W
))
2487 newsect
->flags
|= SEC_READONLY
;
2492 sprintf (namebuf
, "%s%db", typename
, index
);
2493 len
= strlen (namebuf
) + 1;
2494 name
= bfd_alloc (abfd
, len
);
2497 memcpy (name
, namebuf
, len
);
2498 newsect
= bfd_make_section (abfd
, name
);
2499 if (newsect
== NULL
)
2501 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2502 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2503 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2504 if (hdr
->p_type
== PT_LOAD
)
2506 newsect
->flags
|= SEC_ALLOC
;
2507 if (hdr
->p_flags
& PF_X
)
2508 newsect
->flags
|= SEC_CODE
;
2510 if (!(hdr
->p_flags
& PF_W
))
2511 newsect
->flags
|= SEC_READONLY
;
2518 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2520 const struct elf_backend_data
*bed
;
2522 switch (hdr
->p_type
)
2525 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2528 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2531 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2534 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2537 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2539 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2544 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2547 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2549 case PT_GNU_EH_FRAME
:
2550 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2554 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2557 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2560 /* Check for any processor-specific program segment types. */
2561 bed
= get_elf_backend_data (abfd
);
2562 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2566 /* Initialize REL_HDR, the section-header for new section, containing
2567 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2568 relocations; otherwise, we use REL relocations. */
2571 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2572 Elf_Internal_Shdr
*rel_hdr
,
2574 bfd_boolean use_rela_p
)
2577 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2578 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2580 name
= bfd_alloc (abfd
, amt
);
2583 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2585 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2587 if (rel_hdr
->sh_name
== (unsigned int) -1)
2589 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2590 rel_hdr
->sh_entsize
= (use_rela_p
2591 ? bed
->s
->sizeof_rela
2592 : bed
->s
->sizeof_rel
);
2593 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2594 rel_hdr
->sh_flags
= 0;
2595 rel_hdr
->sh_addr
= 0;
2596 rel_hdr
->sh_size
= 0;
2597 rel_hdr
->sh_offset
= 0;
2602 /* Set up an ELF internal section header for a section. */
2605 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2607 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2608 bfd_boolean
*failedptr
= failedptrarg
;
2609 Elf_Internal_Shdr
*this_hdr
;
2613 /* We already failed; just get out of the bfd_map_over_sections
2618 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2620 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2621 asect
->name
, FALSE
);
2622 if (this_hdr
->sh_name
== (unsigned int) -1)
2628 this_hdr
->sh_flags
= 0;
2630 if ((asect
->flags
& SEC_ALLOC
) != 0
2631 || asect
->user_set_vma
)
2632 this_hdr
->sh_addr
= asect
->vma
;
2634 this_hdr
->sh_addr
= 0;
2636 this_hdr
->sh_offset
= 0;
2637 this_hdr
->sh_size
= asect
->size
;
2638 this_hdr
->sh_link
= 0;
2639 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2640 /* The sh_entsize and sh_info fields may have been set already by
2641 copy_private_section_data. */
2643 this_hdr
->bfd_section
= asect
;
2644 this_hdr
->contents
= NULL
;
2646 /* If the section type is unspecified, we set it based on
2648 if (this_hdr
->sh_type
== SHT_NULL
)
2650 if ((asect
->flags
& SEC_GROUP
) != 0)
2652 /* We also need to mark SHF_GROUP here for relocatable
2654 struct bfd_link_order
*l
;
2657 for (l
= asect
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2658 if (l
->type
== bfd_indirect_link_order
2659 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2662 /* The name is not important. Anything will do. */
2663 elf_group_name (elt
->output_section
) = "G";
2664 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2666 elt
= elf_next_in_group (elt
);
2667 /* During a relocatable link, the lists are
2670 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2672 this_hdr
->sh_type
= SHT_GROUP
;
2674 else if ((asect
->flags
& SEC_ALLOC
) != 0
2675 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2676 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2677 this_hdr
->sh_type
= SHT_NOBITS
;
2679 this_hdr
->sh_type
= SHT_PROGBITS
;
2682 switch (this_hdr
->sh_type
)
2688 case SHT_INIT_ARRAY
:
2689 case SHT_FINI_ARRAY
:
2690 case SHT_PREINIT_ARRAY
:
2697 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2701 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2705 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2709 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2710 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2714 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2715 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2718 case SHT_GNU_versym
:
2719 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2722 case SHT_GNU_verdef
:
2723 this_hdr
->sh_entsize
= 0;
2724 /* objcopy or strip will copy over sh_info, but may not set
2725 cverdefs. The linker will set cverdefs, but sh_info will be
2727 if (this_hdr
->sh_info
== 0)
2728 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2730 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2731 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2734 case SHT_GNU_verneed
:
2735 this_hdr
->sh_entsize
= 0;
2736 /* objcopy or strip will copy over sh_info, but may not set
2737 cverrefs. The linker will set cverrefs, but sh_info will be
2739 if (this_hdr
->sh_info
== 0)
2740 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2742 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2743 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2747 this_hdr
->sh_entsize
= 4;
2751 if ((asect
->flags
& SEC_ALLOC
) != 0)
2752 this_hdr
->sh_flags
|= SHF_ALLOC
;
2753 if ((asect
->flags
& SEC_READONLY
) == 0)
2754 this_hdr
->sh_flags
|= SHF_WRITE
;
2755 if ((asect
->flags
& SEC_CODE
) != 0)
2756 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2757 if ((asect
->flags
& SEC_MERGE
) != 0)
2759 this_hdr
->sh_flags
|= SHF_MERGE
;
2760 this_hdr
->sh_entsize
= asect
->entsize
;
2761 if ((asect
->flags
& SEC_STRINGS
) != 0)
2762 this_hdr
->sh_flags
|= SHF_STRINGS
;
2764 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2765 this_hdr
->sh_flags
|= SHF_GROUP
;
2766 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2768 this_hdr
->sh_flags
|= SHF_TLS
;
2769 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2771 struct bfd_link_order
*o
;
2773 this_hdr
->sh_size
= 0;
2774 for (o
= asect
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
2775 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2776 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2777 if (this_hdr
->sh_size
)
2778 this_hdr
->sh_type
= SHT_NOBITS
;
2782 /* Check for processor-specific section types. */
2783 if (bed
->elf_backend_fake_sections
2784 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2787 /* If the section has relocs, set up a section header for the
2788 SHT_REL[A] section. If two relocation sections are required for
2789 this section, it is up to the processor-specific back-end to
2790 create the other. */
2791 if ((asect
->flags
& SEC_RELOC
) != 0
2792 && !_bfd_elf_init_reloc_shdr (abfd
,
2793 &elf_section_data (asect
)->rel_hdr
,
2799 /* Fill in the contents of a SHT_GROUP section. */
2802 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2804 bfd_boolean
*failedptr
= failedptrarg
;
2805 unsigned long symindx
;
2806 asection
*elt
, *first
;
2808 struct bfd_link_order
*l
;
2811 /* Ignore linker created group section. See elfNN_ia64_object_p in
2813 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2818 if (elf_group_id (sec
) != NULL
)
2819 symindx
= elf_group_id (sec
)->udata
.i
;
2823 /* If called from the assembler, swap_out_syms will have set up
2824 elf_section_syms; If called for "ld -r", use target_index. */
2825 if (elf_section_syms (abfd
) != NULL
)
2826 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2828 symindx
= sec
->target_index
;
2830 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2832 /* The contents won't be allocated for "ld -r" or objcopy. */
2834 if (sec
->contents
== NULL
)
2837 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2839 /* Arrange for the section to be written out. */
2840 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2841 if (sec
->contents
== NULL
)
2848 loc
= sec
->contents
+ sec
->size
;
2850 /* Get the pointer to the first section in the group that gas
2851 squirreled away here. objcopy arranges for this to be set to the
2852 start of the input section group. */
2853 first
= elt
= elf_next_in_group (sec
);
2855 /* First element is a flag word. Rest of section is elf section
2856 indices for all the sections of the group. Write them backwards
2857 just to keep the group in the same order as given in .section
2858 directives, not that it matters. */
2867 s
= s
->output_section
;
2870 idx
= elf_section_data (s
)->this_idx
;
2871 H_PUT_32 (abfd
, idx
, loc
);
2872 elt
= elf_next_in_group (elt
);
2877 /* If this is a relocatable link, then the above did nothing because
2878 SEC is the output section. Look through the input sections
2880 for (l
= sec
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2881 if (l
->type
== bfd_indirect_link_order
2882 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2887 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2888 elt
= elf_next_in_group (elt
);
2889 /* During a relocatable link, the lists are circular. */
2891 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2893 if ((loc
-= 4) != sec
->contents
)
2896 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2899 /* Assign all ELF section numbers. The dummy first section is handled here
2900 too. The link/info pointers for the standard section types are filled
2901 in here too, while we're at it. */
2904 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2906 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2908 unsigned int section_number
, secn
;
2909 Elf_Internal_Shdr
**i_shdrp
;
2911 struct bfd_elf_section_data
*d
;
2915 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2917 /* SHT_GROUP sections are in relocatable files only. */
2918 if (link_info
== NULL
|| link_info
->relocatable
)
2920 /* Put SHT_GROUP sections first. */
2921 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2923 d
= elf_section_data (sec
);
2925 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2927 if (sec
->flags
& SEC_LINKER_CREATED
)
2929 /* Remove the linker created SHT_GROUP sections. */
2930 bfd_section_list_remove (abfd
, sec
);
2931 abfd
->section_count
--;
2935 if (section_number
== SHN_LORESERVE
)
2936 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2937 d
->this_idx
= section_number
++;
2943 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2945 d
= elf_section_data (sec
);
2947 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2949 if (section_number
== SHN_LORESERVE
)
2950 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2951 d
->this_idx
= section_number
++;
2953 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2954 if ((sec
->flags
& SEC_RELOC
) == 0)
2958 if (section_number
== SHN_LORESERVE
)
2959 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2960 d
->rel_idx
= section_number
++;
2961 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2966 if (section_number
== SHN_LORESERVE
)
2967 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2968 d
->rel_idx2
= section_number
++;
2969 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2975 if (section_number
== SHN_LORESERVE
)
2976 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2977 t
->shstrtab_section
= section_number
++;
2978 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2979 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2981 if (bfd_get_symcount (abfd
) > 0)
2983 if (section_number
== SHN_LORESERVE
)
2984 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2985 t
->symtab_section
= section_number
++;
2986 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2987 if (section_number
> SHN_LORESERVE
- 2)
2989 if (section_number
== SHN_LORESERVE
)
2990 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2991 t
->symtab_shndx_section
= section_number
++;
2992 t
->symtab_shndx_hdr
.sh_name
2993 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2994 ".symtab_shndx", FALSE
);
2995 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2998 if (section_number
== SHN_LORESERVE
)
2999 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3000 t
->strtab_section
= section_number
++;
3001 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
3004 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
3005 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3007 elf_numsections (abfd
) = section_number
;
3008 elf_elfheader (abfd
)->e_shnum
= section_number
;
3009 if (section_number
> SHN_LORESERVE
)
3010 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3012 /* Set up the list of section header pointers, in agreement with the
3014 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
3015 i_shdrp
= bfd_zalloc (abfd
, amt
);
3016 if (i_shdrp
== NULL
)
3019 amt
= sizeof (Elf_Internal_Shdr
);
3020 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
3021 if (i_shdrp
[0] == NULL
)
3023 bfd_release (abfd
, i_shdrp
);
3027 elf_elfsections (abfd
) = i_shdrp
;
3029 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
3030 if (bfd_get_symcount (abfd
) > 0)
3032 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
3033 if (elf_numsections (abfd
) > SHN_LORESERVE
)
3035 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
3036 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
3038 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
3039 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
3042 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
3044 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
3048 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
3049 if (d
->rel_idx
!= 0)
3050 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
3051 if (d
->rel_idx2
!= 0)
3052 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
3054 /* Fill in the sh_link and sh_info fields while we're at it. */
3056 /* sh_link of a reloc section is the section index of the symbol
3057 table. sh_info is the section index of the section to which
3058 the relocation entries apply. */
3059 if (d
->rel_idx
!= 0)
3061 d
->rel_hdr
.sh_link
= t
->symtab_section
;
3062 d
->rel_hdr
.sh_info
= d
->this_idx
;
3064 if (d
->rel_idx2
!= 0)
3066 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
3067 d
->rel_hdr2
->sh_info
= d
->this_idx
;
3070 /* We need to set up sh_link for SHF_LINK_ORDER. */
3071 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
3073 s
= elf_linked_to_section (sec
);
3075 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3078 struct bfd_link_order
*p
;
3080 /* Find out what the corresponding section in output
3082 for (p
= sec
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
3084 s
= p
->u
.indirect
.section
;
3085 if (p
->type
== bfd_indirect_link_order
3086 && (bfd_get_flavour (s
->owner
)
3087 == bfd_target_elf_flavour
))
3089 Elf_Internal_Shdr
** const elf_shdrp
3090 = elf_elfsections (s
->owner
);
3092 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
3093 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
3095 The Intel C compiler generates SHT_IA_64_UNWIND with
3096 SHF_LINK_ORDER. But it doesn't set the sh_link or
3097 sh_info fields. Hence we could get the situation
3098 where elfsec is 0. */
3101 const struct elf_backend_data
*bed
3102 = get_elf_backend_data (abfd
);
3103 if (bed
->link_order_error_handler
)
3104 bed
->link_order_error_handler
3105 (_("%B: warning: sh_link not set for section `%A'"),
3110 s
= elf_shdrp
[elfsec
]->bfd_section
;
3111 if (elf_discarded_section (s
))
3114 (*_bfd_error_handler
)
3115 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3116 abfd
, d
->this_hdr
.bfd_section
,
3118 /* Point to the kept section if it has
3119 the same size as the discarded
3121 kept
= _bfd_elf_check_kept_section (s
);
3124 bfd_set_error (bfd_error_bad_value
);
3129 s
= s
->output_section
;
3130 BFD_ASSERT (s
!= NULL
);
3131 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3139 switch (d
->this_hdr
.sh_type
)
3143 /* A reloc section which we are treating as a normal BFD
3144 section. sh_link is the section index of the symbol
3145 table. sh_info is the section index of the section to
3146 which the relocation entries apply. We assume that an
3147 allocated reloc section uses the dynamic symbol table.
3148 FIXME: How can we be sure? */
3149 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3151 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3153 /* We look up the section the relocs apply to by name. */
3155 if (d
->this_hdr
.sh_type
== SHT_REL
)
3159 s
= bfd_get_section_by_name (abfd
, name
);
3161 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3165 /* We assume that a section named .stab*str is a stabs
3166 string section. We look for a section with the same name
3167 but without the trailing ``str'', and set its sh_link
3168 field to point to this section. */
3169 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3170 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3175 len
= strlen (sec
->name
);
3176 alc
= bfd_malloc (len
- 2);
3179 memcpy (alc
, sec
->name
, len
- 3);
3180 alc
[len
- 3] = '\0';
3181 s
= bfd_get_section_by_name (abfd
, alc
);
3185 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3187 /* This is a .stab section. */
3188 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3189 elf_section_data (s
)->this_hdr
.sh_entsize
3190 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3197 case SHT_GNU_verneed
:
3198 case SHT_GNU_verdef
:
3199 /* sh_link is the section header index of the string table
3200 used for the dynamic entries, or the symbol table, or the
3202 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3204 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3207 case SHT_GNU_LIBLIST
:
3208 /* sh_link is the section header index of the prelink library
3210 used for the dynamic entries, or the symbol table, or the
3212 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3213 ? ".dynstr" : ".gnu.libstr");
3215 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3219 case SHT_GNU_versym
:
3220 /* sh_link is the section header index of the symbol table
3221 this hash table or version table is for. */
3222 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3224 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3228 d
->this_hdr
.sh_link
= t
->symtab_section
;
3232 for (secn
= 1; secn
< section_number
; ++secn
)
3233 if (i_shdrp
[secn
] == NULL
)
3234 i_shdrp
[secn
] = i_shdrp
[0];
3236 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3237 i_shdrp
[secn
]->sh_name
);
3241 /* Map symbol from it's internal number to the external number, moving
3242 all local symbols to be at the head of the list. */
3245 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3247 /* If the backend has a special mapping, use it. */
3248 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3249 if (bed
->elf_backend_sym_is_global
)
3250 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3252 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3253 || bfd_is_und_section (bfd_get_section (sym
))
3254 || bfd_is_com_section (bfd_get_section (sym
)));
3258 elf_map_symbols (bfd
*abfd
)
3260 unsigned int symcount
= bfd_get_symcount (abfd
);
3261 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3262 asymbol
**sect_syms
;
3263 unsigned int num_locals
= 0;
3264 unsigned int num_globals
= 0;
3265 unsigned int num_locals2
= 0;
3266 unsigned int num_globals2
= 0;
3274 fprintf (stderr
, "elf_map_symbols\n");
3278 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3280 if (max_index
< asect
->index
)
3281 max_index
= asect
->index
;
3285 amt
= max_index
* sizeof (asymbol
*);
3286 sect_syms
= bfd_zalloc (abfd
, amt
);
3287 if (sect_syms
== NULL
)
3289 elf_section_syms (abfd
) = sect_syms
;
3290 elf_num_section_syms (abfd
) = max_index
;
3292 /* Init sect_syms entries for any section symbols we have already
3293 decided to output. */
3294 for (idx
= 0; idx
< symcount
; idx
++)
3296 asymbol
*sym
= syms
[idx
];
3298 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3305 if (sec
->owner
!= NULL
)
3307 if (sec
->owner
!= abfd
)
3309 if (sec
->output_offset
!= 0)
3312 sec
= sec
->output_section
;
3314 /* Empty sections in the input files may have had a
3315 section symbol created for them. (See the comment
3316 near the end of _bfd_generic_link_output_symbols in
3317 linker.c). If the linker script discards such
3318 sections then we will reach this point. Since we know
3319 that we cannot avoid this case, we detect it and skip
3320 the abort and the assignment to the sect_syms array.
3321 To reproduce this particular case try running the
3322 linker testsuite test ld-scripts/weak.exp for an ELF
3323 port that uses the generic linker. */
3324 if (sec
->owner
== NULL
)
3327 BFD_ASSERT (sec
->owner
== abfd
);
3329 sect_syms
[sec
->index
] = syms
[idx
];
3334 /* Classify all of the symbols. */
3335 for (idx
= 0; idx
< symcount
; idx
++)
3337 if (!sym_is_global (abfd
, syms
[idx
]))
3343 /* We will be adding a section symbol for each BFD section. Most normal
3344 sections will already have a section symbol in outsymbols, but
3345 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3346 at least in that case. */
3347 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3349 if (sect_syms
[asect
->index
] == NULL
)
3351 if (!sym_is_global (abfd
, asect
->symbol
))
3358 /* Now sort the symbols so the local symbols are first. */
3359 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3360 new_syms
= bfd_alloc (abfd
, amt
);
3362 if (new_syms
== NULL
)
3365 for (idx
= 0; idx
< symcount
; idx
++)
3367 asymbol
*sym
= syms
[idx
];
3370 if (!sym_is_global (abfd
, sym
))
3373 i
= num_locals
+ num_globals2
++;
3375 sym
->udata
.i
= i
+ 1;
3377 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3379 if (sect_syms
[asect
->index
] == NULL
)
3381 asymbol
*sym
= asect
->symbol
;
3384 sect_syms
[asect
->index
] = sym
;
3385 if (!sym_is_global (abfd
, sym
))
3388 i
= num_locals
+ num_globals2
++;
3390 sym
->udata
.i
= i
+ 1;
3394 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3396 elf_num_locals (abfd
) = num_locals
;
3397 elf_num_globals (abfd
) = num_globals
;
3401 /* Align to the maximum file alignment that could be required for any
3402 ELF data structure. */
3404 static inline file_ptr
3405 align_file_position (file_ptr off
, int align
)
3407 return (off
+ align
- 1) & ~(align
- 1);
3410 /* Assign a file position to a section, optionally aligning to the
3411 required section alignment. */
3414 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3422 al
= i_shdrp
->sh_addralign
;
3424 offset
= BFD_ALIGN (offset
, al
);
3426 i_shdrp
->sh_offset
= offset
;
3427 if (i_shdrp
->bfd_section
!= NULL
)
3428 i_shdrp
->bfd_section
->filepos
= offset
;
3429 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3430 offset
+= i_shdrp
->sh_size
;
3434 /* Compute the file positions we are going to put the sections at, and
3435 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3436 is not NULL, this is being called by the ELF backend linker. */
3439 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3440 struct bfd_link_info
*link_info
)
3442 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3444 struct bfd_strtab_hash
*strtab
= NULL
;
3445 Elf_Internal_Shdr
*shstrtab_hdr
;
3447 if (abfd
->output_has_begun
)
3450 /* Do any elf backend specific processing first. */
3451 if (bed
->elf_backend_begin_write_processing
)
3452 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3454 if (! prep_headers (abfd
))
3457 /* Post process the headers if necessary. */
3458 if (bed
->elf_backend_post_process_headers
)
3459 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3462 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3466 if (!assign_section_numbers (abfd
, link_info
))
3469 /* The backend linker builds symbol table information itself. */
3470 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3472 /* Non-zero if doing a relocatable link. */
3473 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3475 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3479 if (link_info
== NULL
)
3481 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3486 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3487 /* sh_name was set in prep_headers. */
3488 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3489 shstrtab_hdr
->sh_flags
= 0;
3490 shstrtab_hdr
->sh_addr
= 0;
3491 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3492 shstrtab_hdr
->sh_entsize
= 0;
3493 shstrtab_hdr
->sh_link
= 0;
3494 shstrtab_hdr
->sh_info
= 0;
3495 /* sh_offset is set in assign_file_positions_except_relocs. */
3496 shstrtab_hdr
->sh_addralign
= 1;
3498 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3501 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3504 Elf_Internal_Shdr
*hdr
;
3506 off
= elf_tdata (abfd
)->next_file_pos
;
3508 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3509 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3511 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3512 if (hdr
->sh_size
!= 0)
3513 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3515 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3516 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3518 elf_tdata (abfd
)->next_file_pos
= off
;
3520 /* Now that we know where the .strtab section goes, write it
3522 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3523 || ! _bfd_stringtab_emit (abfd
, strtab
))
3525 _bfd_stringtab_free (strtab
);
3528 abfd
->output_has_begun
= TRUE
;
3533 /* Create a mapping from a set of sections to a program segment. */
3535 static struct elf_segment_map
*
3536 make_mapping (bfd
*abfd
,
3537 asection
**sections
,
3542 struct elf_segment_map
*m
;
3547 amt
= sizeof (struct elf_segment_map
);
3548 amt
+= (to
- from
- 1) * sizeof (asection
*);
3549 m
= bfd_zalloc (abfd
, amt
);
3553 m
->p_type
= PT_LOAD
;
3554 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3555 m
->sections
[i
- from
] = *hdrpp
;
3556 m
->count
= to
- from
;
3558 if (from
== 0 && phdr
)
3560 /* Include the headers in the first PT_LOAD segment. */
3561 m
->includes_filehdr
= 1;
3562 m
->includes_phdrs
= 1;
3568 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3571 struct elf_segment_map
*
3572 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3574 struct elf_segment_map
*m
;
3576 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3580 m
->p_type
= PT_DYNAMIC
;
3582 m
->sections
[0] = dynsec
;
3587 /* Set up a mapping from BFD sections to program segments. */
3590 map_sections_to_segments (bfd
*abfd
)
3592 asection
**sections
= NULL
;
3596 struct elf_segment_map
*mfirst
;
3597 struct elf_segment_map
**pm
;
3598 struct elf_segment_map
*m
;
3601 unsigned int phdr_index
;
3602 bfd_vma maxpagesize
;
3604 bfd_boolean phdr_in_segment
= TRUE
;
3605 bfd_boolean writable
;
3607 asection
*first_tls
= NULL
;
3608 asection
*dynsec
, *eh_frame_hdr
;
3611 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3614 if (bfd_count_sections (abfd
) == 0)
3617 /* Select the allocated sections, and sort them. */
3619 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3620 sections
= bfd_malloc (amt
);
3621 if (sections
== NULL
)
3625 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3627 if ((s
->flags
& SEC_ALLOC
) != 0)
3633 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3636 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3638 /* Build the mapping. */
3643 /* If we have a .interp section, then create a PT_PHDR segment for
3644 the program headers and a PT_INTERP segment for the .interp
3646 s
= bfd_get_section_by_name (abfd
, ".interp");
3647 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3649 amt
= sizeof (struct elf_segment_map
);
3650 m
= bfd_zalloc (abfd
, amt
);
3654 m
->p_type
= PT_PHDR
;
3655 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3656 m
->p_flags
= PF_R
| PF_X
;
3657 m
->p_flags_valid
= 1;
3658 m
->includes_phdrs
= 1;
3663 amt
= sizeof (struct elf_segment_map
);
3664 m
= bfd_zalloc (abfd
, amt
);
3668 m
->p_type
= PT_INTERP
;
3676 /* Look through the sections. We put sections in the same program
3677 segment when the start of the second section can be placed within
3678 a few bytes of the end of the first section. */
3682 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3684 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3686 && (dynsec
->flags
& SEC_LOAD
) == 0)
3689 /* Deal with -Ttext or something similar such that the first section
3690 is not adjacent to the program headers. This is an
3691 approximation, since at this point we don't know exactly how many
3692 program headers we will need. */
3695 bfd_size_type phdr_size
;
3697 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3699 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3700 if ((abfd
->flags
& D_PAGED
) == 0
3701 || sections
[0]->lma
< phdr_size
3702 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3703 phdr_in_segment
= FALSE
;
3706 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3709 bfd_boolean new_segment
;
3713 /* See if this section and the last one will fit in the same
3716 if (last_hdr
== NULL
)
3718 /* If we don't have a segment yet, then we don't need a new
3719 one (we build the last one after this loop). */
3720 new_segment
= FALSE
;
3722 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3724 /* If this section has a different relation between the
3725 virtual address and the load address, then we need a new
3729 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3730 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3732 /* If putting this section in this segment would force us to
3733 skip a page in the segment, then we need a new segment. */
3736 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3737 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3739 /* We don't want to put a loadable section after a
3740 nonloadable section in the same segment.
3741 Consider .tbss sections as loadable for this purpose. */
3744 else if ((abfd
->flags
& D_PAGED
) == 0)
3746 /* If the file is not demand paged, which means that we
3747 don't require the sections to be correctly aligned in the
3748 file, then there is no other reason for a new segment. */
3749 new_segment
= FALSE
;
3752 && (hdr
->flags
& SEC_READONLY
) == 0
3753 && (((last_hdr
->lma
+ last_size
- 1)
3754 & ~(maxpagesize
- 1))
3755 != (hdr
->lma
& ~(maxpagesize
- 1))))
3757 /* We don't want to put a writable section in a read only
3758 segment, unless they are on the same page in memory
3759 anyhow. We already know that the last section does not
3760 bring us past the current section on the page, so the
3761 only case in which the new section is not on the same
3762 page as the previous section is when the previous section
3763 ends precisely on a page boundary. */
3768 /* Otherwise, we can use the same segment. */
3769 new_segment
= FALSE
;
3774 if ((hdr
->flags
& SEC_READONLY
) == 0)
3777 /* .tbss sections effectively have zero size. */
3778 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3779 last_size
= hdr
->size
;
3785 /* We need a new program segment. We must create a new program
3786 header holding all the sections from phdr_index until hdr. */
3788 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3795 if ((hdr
->flags
& SEC_READONLY
) == 0)
3801 /* .tbss sections effectively have zero size. */
3802 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3803 last_size
= hdr
->size
;
3807 phdr_in_segment
= FALSE
;
3810 /* Create a final PT_LOAD program segment. */
3811 if (last_hdr
!= NULL
)
3813 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3821 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3824 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3831 /* For each loadable .note section, add a PT_NOTE segment. We don't
3832 use bfd_get_section_by_name, because if we link together
3833 nonloadable .note sections and loadable .note sections, we will
3834 generate two .note sections in the output file. FIXME: Using
3835 names for section types is bogus anyhow. */
3836 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3838 if ((s
->flags
& SEC_LOAD
) != 0
3839 && strncmp (s
->name
, ".note", 5) == 0)
3841 amt
= sizeof (struct elf_segment_map
);
3842 m
= bfd_zalloc (abfd
, amt
);
3846 m
->p_type
= PT_NOTE
;
3853 if (s
->flags
& SEC_THREAD_LOCAL
)
3861 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3866 amt
= sizeof (struct elf_segment_map
);
3867 amt
+= (tls_count
- 1) * sizeof (asection
*);
3868 m
= bfd_zalloc (abfd
, amt
);
3873 m
->count
= tls_count
;
3874 /* Mandated PF_R. */
3876 m
->p_flags_valid
= 1;
3877 for (i
= 0; i
< tls_count
; ++i
)
3879 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3880 m
->sections
[i
] = first_tls
;
3881 first_tls
= first_tls
->next
;
3888 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3890 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3891 if (eh_frame_hdr
!= NULL
3892 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3894 amt
= sizeof (struct elf_segment_map
);
3895 m
= bfd_zalloc (abfd
, amt
);
3899 m
->p_type
= PT_GNU_EH_FRAME
;
3901 m
->sections
[0] = eh_frame_hdr
->output_section
;
3907 if (elf_tdata (abfd
)->stack_flags
)
3909 amt
= sizeof (struct elf_segment_map
);
3910 m
= bfd_zalloc (abfd
, amt
);
3914 m
->p_type
= PT_GNU_STACK
;
3915 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3916 m
->p_flags_valid
= 1;
3922 if (elf_tdata (abfd
)->relro
)
3924 amt
= sizeof (struct elf_segment_map
);
3925 m
= bfd_zalloc (abfd
, amt
);
3929 m
->p_type
= PT_GNU_RELRO
;
3931 m
->p_flags_valid
= 1;
3940 elf_tdata (abfd
)->segment_map
= mfirst
;
3944 if (sections
!= NULL
)
3949 /* Sort sections by address. */
3952 elf_sort_sections (const void *arg1
, const void *arg2
)
3954 const asection
*sec1
= *(const asection
**) arg1
;
3955 const asection
*sec2
= *(const asection
**) arg2
;
3956 bfd_size_type size1
, size2
;
3958 /* Sort by LMA first, since this is the address used to
3959 place the section into a segment. */
3960 if (sec1
->lma
< sec2
->lma
)
3962 else if (sec1
->lma
> sec2
->lma
)
3965 /* Then sort by VMA. Normally the LMA and the VMA will be
3966 the same, and this will do nothing. */
3967 if (sec1
->vma
< sec2
->vma
)
3969 else if (sec1
->vma
> sec2
->vma
)
3972 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3974 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3980 /* If the indicies are the same, do not return 0
3981 here, but continue to try the next comparison. */
3982 if (sec1
->target_index
- sec2
->target_index
!= 0)
3983 return sec1
->target_index
- sec2
->target_index
;
3988 else if (TOEND (sec2
))
3993 /* Sort by size, to put zero sized sections
3994 before others at the same address. */
3996 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3997 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
4004 return sec1
->target_index
- sec2
->target_index
;
4007 /* Ian Lance Taylor writes:
4009 We shouldn't be using % with a negative signed number. That's just
4010 not good. We have to make sure either that the number is not
4011 negative, or that the number has an unsigned type. When the types
4012 are all the same size they wind up as unsigned. When file_ptr is a
4013 larger signed type, the arithmetic winds up as signed long long,
4016 What we're trying to say here is something like ``increase OFF by
4017 the least amount that will cause it to be equal to the VMA modulo
4019 /* In other words, something like:
4021 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4022 off_offset = off % bed->maxpagesize;
4023 if (vma_offset < off_offset)
4024 adjustment = vma_offset + bed->maxpagesize - off_offset;
4026 adjustment = vma_offset - off_offset;
4028 which can can be collapsed into the expression below. */
4031 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
4033 return ((vma
- off
) % maxpagesize
);
4036 /* Assign file positions to the sections based on the mapping from
4037 sections to segments. This function also sets up some fields in
4038 the file header, and writes out the program headers. */
4041 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
4043 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4045 struct elf_segment_map
*m
;
4047 Elf_Internal_Phdr
*phdrs
;
4049 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4050 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4051 Elf_Internal_Phdr
*p
;
4054 if (elf_tdata (abfd
)->segment_map
== NULL
)
4056 if (! map_sections_to_segments (abfd
))
4061 /* The placement algorithm assumes that non allocated sections are
4062 not in PT_LOAD segments. We ensure this here by removing such
4063 sections from the segment map. */
4064 for (m
= elf_tdata (abfd
)->segment_map
;
4068 unsigned int new_count
;
4071 if (m
->p_type
!= PT_LOAD
)
4075 for (i
= 0; i
< m
->count
; i
++)
4077 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
4080 m
->sections
[new_count
] = m
->sections
[i
];
4086 if (new_count
!= m
->count
)
4087 m
->count
= new_count
;
4091 if (bed
->elf_backend_modify_segment_map
)
4093 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
4098 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4101 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4102 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4103 elf_elfheader (abfd
)->e_phnum
= count
;
4107 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4111 /* If we already counted the number of program segments, make sure
4112 that we allocated enough space. This happens when SIZEOF_HEADERS
4113 is used in a linker script. */
4114 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
4115 if (alloc
!= 0 && count
> alloc
)
4117 ((*_bfd_error_handler
)
4118 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4119 abfd
, alloc
, count
));
4120 bfd_set_error (bfd_error_bad_value
);
4127 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
4128 phdrs
= bfd_alloc (abfd
, amt
);
4132 off
= bed
->s
->sizeof_ehdr
;
4133 off
+= alloc
* bed
->s
->sizeof_phdr
;
4140 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4147 /* If elf_segment_map is not from map_sections_to_segments, the
4148 sections may not be correctly ordered. NOTE: sorting should
4149 not be done to the PT_NOTE section of a corefile, which may
4150 contain several pseudo-sections artificially created by bfd.
4151 Sorting these pseudo-sections breaks things badly. */
4153 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4154 && m
->p_type
== PT_NOTE
))
4155 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4158 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4159 number of sections with contents contributing to both p_filesz
4160 and p_memsz, followed by a number of sections with no contents
4161 that just contribute to p_memsz. In this loop, OFF tracks next
4162 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4163 an adjustment we use for segments that have no file contents
4164 but need zero filled memory allocation. */
4166 p
->p_type
= m
->p_type
;
4167 p
->p_flags
= m
->p_flags
;
4169 if (p
->p_type
== PT_LOAD
4172 bfd_size_type align
;
4174 unsigned int align_power
= 0;
4176 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4178 unsigned int secalign
;
4180 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4181 if (secalign
> align_power
)
4182 align_power
= secalign
;
4184 align
= (bfd_size_type
) 1 << align_power
;
4186 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> align
)
4187 align
= bed
->maxpagesize
;
4189 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4192 && !m
->includes_filehdr
4193 && !m
->includes_phdrs
4194 && (ufile_ptr
) off
>= align
)
4196 /* If the first section isn't loadable, the same holds for
4197 any other sections. Since the segment won't need file
4198 space, we can make p_offset overlap some prior segment.
4199 However, .tbss is special. If a segment starts with
4200 .tbss, we need to look at the next section to decide
4201 whether the segment has any loadable sections. */
4203 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4205 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4209 voff
= adjust
- align
;
4215 /* Make sure the .dynamic section is the first section in the
4216 PT_DYNAMIC segment. */
4217 else if (p
->p_type
== PT_DYNAMIC
4219 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4222 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4224 bfd_set_error (bfd_error_bad_value
);
4231 p
->p_vaddr
= m
->sections
[0]->vma
;
4233 if (m
->p_paddr_valid
)
4234 p
->p_paddr
= m
->p_paddr
;
4235 else if (m
->count
== 0)
4238 p
->p_paddr
= m
->sections
[0]->lma
;
4240 if (p
->p_type
== PT_LOAD
4241 && (abfd
->flags
& D_PAGED
) != 0)
4242 p
->p_align
= bed
->maxpagesize
;
4243 else if (m
->count
== 0)
4244 p
->p_align
= 1 << bed
->s
->log_file_align
;
4252 if (m
->includes_filehdr
)
4254 if (! m
->p_flags_valid
)
4257 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4258 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4261 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4263 if (p
->p_vaddr
< (bfd_vma
) off
)
4265 (*_bfd_error_handler
)
4266 (_("%B: Not enough room for program headers, try linking with -N"),
4268 bfd_set_error (bfd_error_bad_value
);
4273 if (! m
->p_paddr_valid
)
4276 if (p
->p_type
== PT_LOAD
)
4278 filehdr_vaddr
= p
->p_vaddr
;
4279 filehdr_paddr
= p
->p_paddr
;
4283 if (m
->includes_phdrs
)
4285 if (! m
->p_flags_valid
)
4288 if (m
->includes_filehdr
)
4290 if (p
->p_type
== PT_LOAD
)
4292 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4293 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4298 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4302 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4303 p
->p_vaddr
-= off
- p
->p_offset
;
4304 if (! m
->p_paddr_valid
)
4305 p
->p_paddr
-= off
- p
->p_offset
;
4308 if (p
->p_type
== PT_LOAD
)
4310 phdrs_vaddr
= p
->p_vaddr
;
4311 phdrs_paddr
= p
->p_paddr
;
4314 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4317 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4318 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4321 if (p
->p_type
== PT_LOAD
4322 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4324 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4325 p
->p_offset
= off
+ voff
;
4330 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4331 p
->p_filesz
+= adjust
;
4332 p
->p_memsz
+= adjust
;
4336 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4340 bfd_size_type align
;
4344 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4346 if (p
->p_type
== PT_LOAD
4347 || p
->p_type
== PT_TLS
)
4349 bfd_signed_vma adjust
;
4351 if ((flags
& SEC_LOAD
) != 0)
4353 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4356 (*_bfd_error_handler
)
4357 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4358 abfd
, sec
, (unsigned long) sec
->lma
);
4362 p
->p_filesz
+= adjust
;
4363 p
->p_memsz
+= adjust
;
4365 /* .tbss is special. It doesn't contribute to p_memsz of
4367 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4368 || p
->p_type
== PT_TLS
)
4370 /* The section VMA must equal the file position
4371 modulo the page size. */
4372 bfd_size_type page
= align
;
4373 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> page
)
4374 page
= bed
->maxpagesize
;
4375 adjust
= vma_page_aligned_bias (sec
->vma
,
4376 p
->p_vaddr
+ p
->p_memsz
,
4378 p
->p_memsz
+= adjust
;
4382 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4384 /* The section at i == 0 is the one that actually contains
4390 p
->p_filesz
= sec
->size
;
4396 /* The rest are fake sections that shouldn't be written. */
4405 if (p
->p_type
== PT_LOAD
)
4408 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4409 1997, and the exact reason for it isn't clear. One
4410 plausible explanation is that it is to work around
4411 a problem we have with linker scripts using data
4412 statements in NOLOAD sections. I don't think it
4413 makes a great deal of sense to have such a section
4414 assigned to a PT_LOAD segment, but apparently
4415 people do this. The data statement results in a
4416 bfd_data_link_order being built, and these need
4417 section contents to write into. Eventually, we get
4418 to _bfd_elf_write_object_contents which writes any
4419 section with contents to the output. Make room
4420 here for the write, so that following segments are
4422 if ((flags
& SEC_LOAD
) != 0
4423 || (flags
& SEC_HAS_CONTENTS
) != 0)
4427 if ((flags
& SEC_LOAD
) != 0)
4429 p
->p_filesz
+= sec
->size
;
4430 p
->p_memsz
+= sec
->size
;
4432 /* PR ld/594: Sections in note segments which are not loaded
4433 contribute to the file size but not the in-memory size. */
4434 else if (p
->p_type
== PT_NOTE
4435 && (flags
& SEC_HAS_CONTENTS
) != 0)
4436 p
->p_filesz
+= sec
->size
;
4438 /* .tbss is special. It doesn't contribute to p_memsz of
4440 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4441 || p
->p_type
== PT_TLS
)
4442 p
->p_memsz
+= sec
->size
;
4444 if (p
->p_type
== PT_TLS
4446 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4448 struct bfd_link_order
*o
;
4449 bfd_vma tbss_size
= 0;
4451 for (o
= sec
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
4452 if (tbss_size
< o
->offset
+ o
->size
)
4453 tbss_size
= o
->offset
+ o
->size
;
4455 p
->p_memsz
+= tbss_size
;
4458 if (align
> p
->p_align
4459 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4463 if (! m
->p_flags_valid
)
4466 if ((flags
& SEC_CODE
) != 0)
4468 if ((flags
& SEC_READONLY
) == 0)
4474 /* Now that we have set the section file positions, we can set up
4475 the file positions for the non PT_LOAD segments. */
4476 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4480 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4482 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4483 /* If the section has not yet been assigned a file position,
4484 do so now. The ARM BPABI requires that .dynamic section
4485 not be marked SEC_ALLOC because it is not part of any
4486 PT_LOAD segment, so it will not be processed above. */
4487 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4490 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4493 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4495 off
= (_bfd_elf_assign_file_position_for_section
4496 (i_shdrpp
[i
], off
, TRUE
));
4497 p
->p_filesz
= m
->sections
[0]->size
;
4499 p
->p_offset
= m
->sections
[0]->filepos
;
4503 if (m
->includes_filehdr
)
4505 p
->p_vaddr
= filehdr_vaddr
;
4506 if (! m
->p_paddr_valid
)
4507 p
->p_paddr
= filehdr_paddr
;
4509 else if (m
->includes_phdrs
)
4511 p
->p_vaddr
= phdrs_vaddr
;
4512 if (! m
->p_paddr_valid
)
4513 p
->p_paddr
= phdrs_paddr
;
4515 else if (p
->p_type
== PT_GNU_RELRO
)
4517 Elf_Internal_Phdr
*lp
;
4519 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4521 if (lp
->p_type
== PT_LOAD
4522 && lp
->p_vaddr
<= link_info
->relro_end
4523 && lp
->p_vaddr
>= link_info
->relro_start
4524 && lp
->p_vaddr
+ lp
->p_filesz
4525 >= link_info
->relro_end
)
4529 if (lp
< phdrs
+ count
4530 && link_info
->relro_end
> lp
->p_vaddr
)
4532 p
->p_vaddr
= lp
->p_vaddr
;
4533 p
->p_paddr
= lp
->p_paddr
;
4534 p
->p_offset
= lp
->p_offset
;
4535 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4536 p
->p_memsz
= p
->p_filesz
;
4538 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4542 memset (p
, 0, sizeof *p
);
4543 p
->p_type
= PT_NULL
;
4549 /* Clear out any program headers we allocated but did not use. */
4550 for (; count
< alloc
; count
++, p
++)
4552 memset (p
, 0, sizeof *p
);
4553 p
->p_type
= PT_NULL
;
4556 elf_tdata (abfd
)->phdr
= phdrs
;
4558 elf_tdata (abfd
)->next_file_pos
= off
;
4560 /* Write out the program headers. */
4561 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4562 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4568 /* Get the size of the program header.
4570 If this is called by the linker before any of the section VMA's are set, it
4571 can't calculate the correct value for a strange memory layout. This only
4572 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4573 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4574 data segment (exclusive of .interp and .dynamic).
4576 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4577 will be two segments. */
4579 static bfd_size_type
4580 get_program_header_size (bfd
*abfd
)
4584 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4586 /* We can't return a different result each time we're called. */
4587 if (elf_tdata (abfd
)->program_header_size
!= 0)
4588 return elf_tdata (abfd
)->program_header_size
;
4590 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4592 struct elf_segment_map
*m
;
4595 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4597 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4598 return elf_tdata (abfd
)->program_header_size
;
4601 /* Assume we will need exactly two PT_LOAD segments: one for text
4602 and one for data. */
4605 s
= bfd_get_section_by_name (abfd
, ".interp");
4606 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4608 /* If we have a loadable interpreter section, we need a
4609 PT_INTERP segment. In this case, assume we also need a
4610 PT_PHDR segment, although that may not be true for all
4615 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4617 /* We need a PT_DYNAMIC segment. */
4621 if (elf_tdata (abfd
)->eh_frame_hdr
)
4623 /* We need a PT_GNU_EH_FRAME segment. */
4627 if (elf_tdata (abfd
)->stack_flags
)
4629 /* We need a PT_GNU_STACK segment. */
4633 if (elf_tdata (abfd
)->relro
)
4635 /* We need a PT_GNU_RELRO segment. */
4639 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4641 if ((s
->flags
& SEC_LOAD
) != 0
4642 && strncmp (s
->name
, ".note", 5) == 0)
4644 /* We need a PT_NOTE segment. */
4649 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4651 if (s
->flags
& SEC_THREAD_LOCAL
)
4653 /* We need a PT_TLS segment. */
4659 /* Let the backend count up any program headers it might need. */
4660 if (bed
->elf_backend_additional_program_headers
)
4664 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4670 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4671 return elf_tdata (abfd
)->program_header_size
;
4674 /* Work out the file positions of all the sections. This is called by
4675 _bfd_elf_compute_section_file_positions. All the section sizes and
4676 VMAs must be known before this is called.
4678 Reloc sections come in two flavours: Those processed specially as
4679 "side-channel" data attached to a section to which they apply, and
4680 those that bfd doesn't process as relocations. The latter sort are
4681 stored in a normal bfd section by bfd_section_from_shdr. We don't
4682 consider the former sort here, unless they form part of the loadable
4683 image. Reloc sections not assigned here will be handled later by
4684 assign_file_positions_for_relocs.
4686 We also don't set the positions of the .symtab and .strtab here. */
4689 assign_file_positions_except_relocs (bfd
*abfd
,
4690 struct bfd_link_info
*link_info
)
4692 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4693 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4694 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4695 unsigned int num_sec
= elf_numsections (abfd
);
4697 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4699 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4700 && bfd_get_format (abfd
) != bfd_core
)
4702 Elf_Internal_Shdr
**hdrpp
;
4705 /* Start after the ELF header. */
4706 off
= i_ehdrp
->e_ehsize
;
4708 /* We are not creating an executable, which means that we are
4709 not creating a program header, and that the actual order of
4710 the sections in the file is unimportant. */
4711 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4713 Elf_Internal_Shdr
*hdr
;
4716 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4717 && hdr
->bfd_section
== NULL
)
4718 || i
== tdata
->symtab_section
4719 || i
== tdata
->symtab_shndx_section
4720 || i
== tdata
->strtab_section
)
4722 hdr
->sh_offset
= -1;
4725 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4727 if (i
== SHN_LORESERVE
- 1)
4729 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4730 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4737 Elf_Internal_Shdr
**hdrpp
;
4739 /* Assign file positions for the loaded sections based on the
4740 assignment of sections to segments. */
4741 if (! assign_file_positions_for_segments (abfd
, link_info
))
4744 /* Assign file positions for the other sections. */
4746 off
= elf_tdata (abfd
)->next_file_pos
;
4747 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4749 Elf_Internal_Shdr
*hdr
;
4752 if (hdr
->bfd_section
!= NULL
4753 && hdr
->bfd_section
->filepos
!= 0)
4754 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4755 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4757 ((*_bfd_error_handler
)
4758 (_("%B: warning: allocated section `%s' not in segment"),
4760 (hdr
->bfd_section
== NULL
4762 : hdr
->bfd_section
->name
)));
4763 if ((abfd
->flags
& D_PAGED
) != 0)
4764 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4767 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4769 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4772 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4773 && hdr
->bfd_section
== NULL
)
4774 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4775 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4776 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4777 hdr
->sh_offset
= -1;
4779 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4781 if (i
== SHN_LORESERVE
- 1)
4783 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4784 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4789 /* Place the section headers. */
4790 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4791 i_ehdrp
->e_shoff
= off
;
4792 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4794 elf_tdata (abfd
)->next_file_pos
= off
;
4800 prep_headers (bfd
*abfd
)
4802 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4803 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4804 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4805 struct elf_strtab_hash
*shstrtab
;
4806 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4808 i_ehdrp
= elf_elfheader (abfd
);
4809 i_shdrp
= elf_elfsections (abfd
);
4811 shstrtab
= _bfd_elf_strtab_init ();
4812 if (shstrtab
== NULL
)
4815 elf_shstrtab (abfd
) = shstrtab
;
4817 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4818 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4819 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4820 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4822 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4823 i_ehdrp
->e_ident
[EI_DATA
] =
4824 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4825 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4827 if ((abfd
->flags
& DYNAMIC
) != 0)
4828 i_ehdrp
->e_type
= ET_DYN
;
4829 else if ((abfd
->flags
& EXEC_P
) != 0)
4830 i_ehdrp
->e_type
= ET_EXEC
;
4831 else if (bfd_get_format (abfd
) == bfd_core
)
4832 i_ehdrp
->e_type
= ET_CORE
;
4834 i_ehdrp
->e_type
= ET_REL
;
4836 switch (bfd_get_arch (abfd
))
4838 case bfd_arch_unknown
:
4839 i_ehdrp
->e_machine
= EM_NONE
;
4842 /* There used to be a long list of cases here, each one setting
4843 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4844 in the corresponding bfd definition. To avoid duplication,
4845 the switch was removed. Machines that need special handling
4846 can generally do it in elf_backend_final_write_processing(),
4847 unless they need the information earlier than the final write.
4848 Such need can generally be supplied by replacing the tests for
4849 e_machine with the conditions used to determine it. */
4851 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4854 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4855 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4857 /* No program header, for now. */
4858 i_ehdrp
->e_phoff
= 0;
4859 i_ehdrp
->e_phentsize
= 0;
4860 i_ehdrp
->e_phnum
= 0;
4862 /* Each bfd section is section header entry. */
4863 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4864 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4866 /* If we're building an executable, we'll need a program header table. */
4867 if (abfd
->flags
& EXEC_P
)
4868 /* It all happens later. */
4872 i_ehdrp
->e_phentsize
= 0;
4874 i_ehdrp
->e_phoff
= 0;
4877 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4878 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4879 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4880 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4881 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4882 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4883 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4884 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4885 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4891 /* Assign file positions for all the reloc sections which are not part
4892 of the loadable file image. */
4895 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4898 unsigned int i
, num_sec
;
4899 Elf_Internal_Shdr
**shdrpp
;
4901 off
= elf_tdata (abfd
)->next_file_pos
;
4903 num_sec
= elf_numsections (abfd
);
4904 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4906 Elf_Internal_Shdr
*shdrp
;
4909 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4910 && shdrp
->sh_offset
== -1)
4911 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4914 elf_tdata (abfd
)->next_file_pos
= off
;
4918 _bfd_elf_write_object_contents (bfd
*abfd
)
4920 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4921 Elf_Internal_Ehdr
*i_ehdrp
;
4922 Elf_Internal_Shdr
**i_shdrp
;
4924 unsigned int count
, num_sec
;
4926 if (! abfd
->output_has_begun
4927 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4930 i_shdrp
= elf_elfsections (abfd
);
4931 i_ehdrp
= elf_elfheader (abfd
);
4934 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4938 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4940 /* After writing the headers, we need to write the sections too... */
4941 num_sec
= elf_numsections (abfd
);
4942 for (count
= 1; count
< num_sec
; count
++)
4944 if (bed
->elf_backend_section_processing
)
4945 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4946 if (i_shdrp
[count
]->contents
)
4948 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4950 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4951 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4954 if (count
== SHN_LORESERVE
- 1)
4955 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4958 /* Write out the section header names. */
4959 if (elf_shstrtab (abfd
) != NULL
4960 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4961 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4964 if (bed
->elf_backend_final_write_processing
)
4965 (*bed
->elf_backend_final_write_processing
) (abfd
,
4966 elf_tdata (abfd
)->linker
);
4968 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4972 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4974 /* Hopefully this can be done just like an object file. */
4975 return _bfd_elf_write_object_contents (abfd
);
4978 /* Given a section, search the header to find them. */
4981 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4983 const struct elf_backend_data
*bed
;
4986 if (elf_section_data (asect
) != NULL
4987 && elf_section_data (asect
)->this_idx
!= 0)
4988 return elf_section_data (asect
)->this_idx
;
4990 if (bfd_is_abs_section (asect
))
4992 else if (bfd_is_com_section (asect
))
4994 else if (bfd_is_und_section (asect
))
4999 bed
= get_elf_backend_data (abfd
);
5000 if (bed
->elf_backend_section_from_bfd_section
)
5004 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
5009 bfd_set_error (bfd_error_nonrepresentable_section
);
5014 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5018 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
5020 asymbol
*asym_ptr
= *asym_ptr_ptr
;
5022 flagword flags
= asym_ptr
->flags
;
5024 /* When gas creates relocations against local labels, it creates its
5025 own symbol for the section, but does put the symbol into the
5026 symbol chain, so udata is 0. When the linker is generating
5027 relocatable output, this section symbol may be for one of the
5028 input sections rather than the output section. */
5029 if (asym_ptr
->udata
.i
== 0
5030 && (flags
& BSF_SECTION_SYM
)
5031 && asym_ptr
->section
)
5035 if (asym_ptr
->section
->output_section
!= NULL
)
5036 indx
= asym_ptr
->section
->output_section
->index
;
5038 indx
= asym_ptr
->section
->index
;
5039 if (indx
< elf_num_section_syms (abfd
)
5040 && elf_section_syms (abfd
)[indx
] != NULL
)
5041 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
5044 idx
= asym_ptr
->udata
.i
;
5048 /* This case can occur when using --strip-symbol on a symbol
5049 which is used in a relocation entry. */
5050 (*_bfd_error_handler
)
5051 (_("%B: symbol `%s' required but not present"),
5052 abfd
, bfd_asymbol_name (asym_ptr
));
5053 bfd_set_error (bfd_error_no_symbols
);
5060 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5061 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
5062 elf_symbol_flags (flags
));
5070 /* Copy private BFD data. This copies any program header information. */
5073 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5075 Elf_Internal_Ehdr
*iehdr
;
5076 struct elf_segment_map
*map
;
5077 struct elf_segment_map
*map_first
;
5078 struct elf_segment_map
**pointer_to_map
;
5079 Elf_Internal_Phdr
*segment
;
5082 unsigned int num_segments
;
5083 bfd_boolean phdr_included
= FALSE
;
5084 bfd_vma maxpagesize
;
5085 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5086 unsigned int phdr_adjust_num
= 0;
5087 const struct elf_backend_data
*bed
;
5089 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5090 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5093 if (elf_tdata (ibfd
)->phdr
== NULL
)
5096 bed
= get_elf_backend_data (ibfd
);
5097 iehdr
= elf_elfheader (ibfd
);
5100 pointer_to_map
= &map_first
;
5102 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5103 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5105 /* Returns the end address of the segment + 1. */
5106 #define SEGMENT_END(segment, start) \
5107 (start + (segment->p_memsz > segment->p_filesz \
5108 ? segment->p_memsz : segment->p_filesz))
5110 #define SECTION_SIZE(section, segment) \
5111 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5112 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5113 ? section->size : 0)
5115 /* Returns TRUE if the given section is contained within
5116 the given segment. VMA addresses are compared. */
5117 #define IS_CONTAINED_BY_VMA(section, segment) \
5118 (section->vma >= segment->p_vaddr \
5119 && (section->vma + SECTION_SIZE (section, segment) \
5120 <= (SEGMENT_END (segment, segment->p_vaddr))))
5122 /* Returns TRUE if the given section is contained within
5123 the given segment. LMA addresses are compared. */
5124 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5125 (section->lma >= base \
5126 && (section->lma + SECTION_SIZE (section, segment) \
5127 <= SEGMENT_END (segment, base)))
5129 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5130 #define IS_COREFILE_NOTE(p, s) \
5131 (p->p_type == PT_NOTE \
5132 && bfd_get_format (ibfd) == bfd_core \
5133 && s->vma == 0 && s->lma == 0 \
5134 && (bfd_vma) s->filepos >= p->p_offset \
5135 && ((bfd_vma) s->filepos + s->size \
5136 <= p->p_offset + p->p_filesz))
5138 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5139 linker, which generates a PT_INTERP section with p_vaddr and
5140 p_memsz set to 0. */
5141 #define IS_SOLARIS_PT_INTERP(p, s) \
5143 && p->p_paddr == 0 \
5144 && p->p_memsz == 0 \
5145 && p->p_filesz > 0 \
5146 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5148 && (bfd_vma) s->filepos >= p->p_offset \
5149 && ((bfd_vma) s->filepos + s->size \
5150 <= p->p_offset + p->p_filesz))
5152 /* Decide if the given section should be included in the given segment.
5153 A section will be included if:
5154 1. It is within the address space of the segment -- we use the LMA
5155 if that is set for the segment and the VMA otherwise,
5156 2. It is an allocated segment,
5157 3. There is an output section associated with it,
5158 4. The section has not already been allocated to a previous segment.
5159 5. PT_GNU_STACK segments do not include any sections.
5160 6. PT_TLS segment includes only SHF_TLS sections.
5161 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5162 8. PT_DYNAMIC should not contain empty sections at the beginning
5163 (with the possible exception of .dynamic). */
5164 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5165 ((((segment->p_paddr \
5166 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5167 : IS_CONTAINED_BY_VMA (section, segment)) \
5168 && (section->flags & SEC_ALLOC) != 0) \
5169 || IS_COREFILE_NOTE (segment, section)) \
5170 && section->output_section != NULL \
5171 && segment->p_type != PT_GNU_STACK \
5172 && (segment->p_type != PT_TLS \
5173 || (section->flags & SEC_THREAD_LOCAL)) \
5174 && (segment->p_type == PT_LOAD \
5175 || segment->p_type == PT_TLS \
5176 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5177 && (segment->p_type != PT_DYNAMIC \
5178 || SECTION_SIZE (section, segment) > 0 \
5179 || (segment->p_paddr \
5180 ? segment->p_paddr != section->lma \
5181 : segment->p_vaddr != section->vma) \
5182 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5184 && ! section->segment_mark)
5186 /* Returns TRUE iff seg1 starts after the end of seg2. */
5187 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5188 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5190 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5191 their VMA address ranges and their LMA address ranges overlap.
5192 It is possible to have overlapping VMA ranges without overlapping LMA
5193 ranges. RedBoot images for example can have both .data and .bss mapped
5194 to the same VMA range, but with the .data section mapped to a different
5196 #define SEGMENT_OVERLAPS(seg1, seg2) \
5197 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5198 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5199 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5200 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5202 /* Initialise the segment mark field. */
5203 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5204 section
->segment_mark
= FALSE
;
5206 /* Scan through the segments specified in the program header
5207 of the input BFD. For this first scan we look for overlaps
5208 in the loadable segments. These can be created by weird
5209 parameters to objcopy. Also, fix some solaris weirdness. */
5210 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5215 Elf_Internal_Phdr
*segment2
;
5217 if (segment
->p_type
== PT_INTERP
)
5218 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5219 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5221 /* Mininal change so that the normal section to segment
5222 assignment code will work. */
5223 segment
->p_vaddr
= section
->vma
;
5227 if (segment
->p_type
!= PT_LOAD
)
5230 /* Determine if this segment overlaps any previous segments. */
5231 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5233 bfd_signed_vma extra_length
;
5235 if (segment2
->p_type
!= PT_LOAD
5236 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5239 /* Merge the two segments together. */
5240 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5242 /* Extend SEGMENT2 to include SEGMENT and then delete
5245 SEGMENT_END (segment
, segment
->p_vaddr
)
5246 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5248 if (extra_length
> 0)
5250 segment2
->p_memsz
+= extra_length
;
5251 segment2
->p_filesz
+= extra_length
;
5254 segment
->p_type
= PT_NULL
;
5256 /* Since we have deleted P we must restart the outer loop. */
5258 segment
= elf_tdata (ibfd
)->phdr
;
5263 /* Extend SEGMENT to include SEGMENT2 and then delete
5266 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5267 - SEGMENT_END (segment
, segment
->p_vaddr
);
5269 if (extra_length
> 0)
5271 segment
->p_memsz
+= extra_length
;
5272 segment
->p_filesz
+= extra_length
;
5275 segment2
->p_type
= PT_NULL
;
5280 /* The second scan attempts to assign sections to segments. */
5281 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5285 unsigned int section_count
;
5286 asection
** sections
;
5287 asection
* output_section
;
5289 bfd_vma matching_lma
;
5290 bfd_vma suggested_lma
;
5294 if (segment
->p_type
== PT_NULL
)
5297 /* Compute how many sections might be placed into this segment. */
5298 for (section
= ibfd
->sections
, section_count
= 0;
5300 section
= section
->next
)
5301 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5304 /* Allocate a segment map big enough to contain
5305 all of the sections we have selected. */
5306 amt
= sizeof (struct elf_segment_map
);
5307 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5308 map
= bfd_alloc (obfd
, amt
);
5312 /* Initialise the fields of the segment map. Default to
5313 using the physical address of the segment in the input BFD. */
5315 map
->p_type
= segment
->p_type
;
5316 map
->p_flags
= segment
->p_flags
;
5317 map
->p_flags_valid
= 1;
5318 map
->p_paddr
= segment
->p_paddr
;
5319 map
->p_paddr_valid
= 1;
5321 /* Determine if this segment contains the ELF file header
5322 and if it contains the program headers themselves. */
5323 map
->includes_filehdr
= (segment
->p_offset
== 0
5324 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5326 map
->includes_phdrs
= 0;
5328 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5330 map
->includes_phdrs
=
5331 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5332 && (segment
->p_offset
+ segment
->p_filesz
5333 >= ((bfd_vma
) iehdr
->e_phoff
5334 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5336 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5337 phdr_included
= TRUE
;
5340 if (section_count
== 0)
5342 /* Special segments, such as the PT_PHDR segment, may contain
5343 no sections, but ordinary, loadable segments should contain
5344 something. They are allowed by the ELF spec however, so only
5345 a warning is produced. */
5346 if (segment
->p_type
== PT_LOAD
)
5347 (*_bfd_error_handler
)
5348 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5352 *pointer_to_map
= map
;
5353 pointer_to_map
= &map
->next
;
5358 /* Now scan the sections in the input BFD again and attempt
5359 to add their corresponding output sections to the segment map.
5360 The problem here is how to handle an output section which has
5361 been moved (ie had its LMA changed). There are four possibilities:
5363 1. None of the sections have been moved.
5364 In this case we can continue to use the segment LMA from the
5367 2. All of the sections have been moved by the same amount.
5368 In this case we can change the segment's LMA to match the LMA
5369 of the first section.
5371 3. Some of the sections have been moved, others have not.
5372 In this case those sections which have not been moved can be
5373 placed in the current segment which will have to have its size,
5374 and possibly its LMA changed, and a new segment or segments will
5375 have to be created to contain the other sections.
5377 4. The sections have been moved, but not by the same amount.
5378 In this case we can change the segment's LMA to match the LMA
5379 of the first section and we will have to create a new segment
5380 or segments to contain the other sections.
5382 In order to save time, we allocate an array to hold the section
5383 pointers that we are interested in. As these sections get assigned
5384 to a segment, they are removed from this array. */
5386 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5387 to work around this long long bug. */
5388 amt
= section_count
* sizeof (asection
*);
5389 sections
= bfd_malloc (amt
);
5390 if (sections
== NULL
)
5393 /* Step One: Scan for segment vs section LMA conflicts.
5394 Also add the sections to the section array allocated above.
5395 Also add the sections to the current segment. In the common
5396 case, where the sections have not been moved, this means that
5397 we have completely filled the segment, and there is nothing
5403 for (j
= 0, section
= ibfd
->sections
;
5405 section
= section
->next
)
5407 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5409 output_section
= section
->output_section
;
5411 sections
[j
++] = section
;
5413 /* The Solaris native linker always sets p_paddr to 0.
5414 We try to catch that case here, and set it to the
5415 correct value. Note - some backends require that
5416 p_paddr be left as zero. */
5417 if (segment
->p_paddr
== 0
5418 && segment
->p_vaddr
!= 0
5419 && (! bed
->want_p_paddr_set_to_zero
)
5421 && output_section
->lma
!= 0
5422 && (output_section
->vma
== (segment
->p_vaddr
5423 + (map
->includes_filehdr
5426 + (map
->includes_phdrs
5428 * iehdr
->e_phentsize
)
5430 map
->p_paddr
= segment
->p_vaddr
;
5432 /* Match up the physical address of the segment with the
5433 LMA address of the output section. */
5434 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5435 || IS_COREFILE_NOTE (segment
, section
)
5436 || (bed
->want_p_paddr_set_to_zero
&&
5437 IS_CONTAINED_BY_VMA (output_section
, segment
))
5440 if (matching_lma
== 0)
5441 matching_lma
= output_section
->lma
;
5443 /* We assume that if the section fits within the segment
5444 then it does not overlap any other section within that
5446 map
->sections
[isec
++] = output_section
;
5448 else if (suggested_lma
== 0)
5449 suggested_lma
= output_section
->lma
;
5453 BFD_ASSERT (j
== section_count
);
5455 /* Step Two: Adjust the physical address of the current segment,
5457 if (isec
== section_count
)
5459 /* All of the sections fitted within the segment as currently
5460 specified. This is the default case. Add the segment to
5461 the list of built segments and carry on to process the next
5462 program header in the input BFD. */
5463 map
->count
= section_count
;
5464 *pointer_to_map
= map
;
5465 pointer_to_map
= &map
->next
;
5472 if (matching_lma
!= 0)
5474 /* At least one section fits inside the current segment.
5475 Keep it, but modify its physical address to match the
5476 LMA of the first section that fitted. */
5477 map
->p_paddr
= matching_lma
;
5481 /* None of the sections fitted inside the current segment.
5482 Change the current segment's physical address to match
5483 the LMA of the first section. */
5484 map
->p_paddr
= suggested_lma
;
5487 /* Offset the segment physical address from the lma
5488 to allow for space taken up by elf headers. */
5489 if (map
->includes_filehdr
)
5490 map
->p_paddr
-= iehdr
->e_ehsize
;
5492 if (map
->includes_phdrs
)
5494 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5496 /* iehdr->e_phnum is just an estimate of the number
5497 of program headers that we will need. Make a note
5498 here of the number we used and the segment we chose
5499 to hold these headers, so that we can adjust the
5500 offset when we know the correct value. */
5501 phdr_adjust_num
= iehdr
->e_phnum
;
5502 phdr_adjust_seg
= map
;
5506 /* Step Three: Loop over the sections again, this time assigning
5507 those that fit to the current segment and removing them from the
5508 sections array; but making sure not to leave large gaps. Once all
5509 possible sections have been assigned to the current segment it is
5510 added to the list of built segments and if sections still remain
5511 to be assigned, a new segment is constructed before repeating
5519 /* Fill the current segment with sections that fit. */
5520 for (j
= 0; j
< section_count
; j
++)
5522 section
= sections
[j
];
5524 if (section
== NULL
)
5527 output_section
= section
->output_section
;
5529 BFD_ASSERT (output_section
!= NULL
);
5531 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5532 || IS_COREFILE_NOTE (segment
, section
))
5534 if (map
->count
== 0)
5536 /* If the first section in a segment does not start at
5537 the beginning of the segment, then something is
5539 if (output_section
->lma
!=
5541 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5542 + (map
->includes_phdrs
5543 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5549 asection
* prev_sec
;
5551 prev_sec
= map
->sections
[map
->count
- 1];
5553 /* If the gap between the end of the previous section
5554 and the start of this section is more than
5555 maxpagesize then we need to start a new segment. */
5556 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5558 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5559 || ((prev_sec
->lma
+ prev_sec
->size
)
5560 > output_section
->lma
))
5562 if (suggested_lma
== 0)
5563 suggested_lma
= output_section
->lma
;
5569 map
->sections
[map
->count
++] = output_section
;
5572 section
->segment_mark
= TRUE
;
5574 else if (suggested_lma
== 0)
5575 suggested_lma
= output_section
->lma
;
5578 BFD_ASSERT (map
->count
> 0);
5580 /* Add the current segment to the list of built segments. */
5581 *pointer_to_map
= map
;
5582 pointer_to_map
= &map
->next
;
5584 if (isec
< section_count
)
5586 /* We still have not allocated all of the sections to
5587 segments. Create a new segment here, initialise it
5588 and carry on looping. */
5589 amt
= sizeof (struct elf_segment_map
);
5590 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5591 map
= bfd_alloc (obfd
, amt
);
5598 /* Initialise the fields of the segment map. Set the physical
5599 physical address to the LMA of the first section that has
5600 not yet been assigned. */
5602 map
->p_type
= segment
->p_type
;
5603 map
->p_flags
= segment
->p_flags
;
5604 map
->p_flags_valid
= 1;
5605 map
->p_paddr
= suggested_lma
;
5606 map
->p_paddr_valid
= 1;
5607 map
->includes_filehdr
= 0;
5608 map
->includes_phdrs
= 0;
5611 while (isec
< section_count
);
5616 /* The Solaris linker creates program headers in which all the
5617 p_paddr fields are zero. When we try to objcopy or strip such a
5618 file, we get confused. Check for this case, and if we find it
5619 reset the p_paddr_valid fields. */
5620 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5621 if (map
->p_paddr
!= 0)
5624 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5625 map
->p_paddr_valid
= 0;
5627 elf_tdata (obfd
)->segment_map
= map_first
;
5629 /* If we had to estimate the number of program headers that were
5630 going to be needed, then check our estimate now and adjust
5631 the offset if necessary. */
5632 if (phdr_adjust_seg
!= NULL
)
5636 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5639 if (count
> phdr_adjust_num
)
5640 phdr_adjust_seg
->p_paddr
5641 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5646 #undef IS_CONTAINED_BY_VMA
5647 #undef IS_CONTAINED_BY_LMA
5648 #undef IS_COREFILE_NOTE
5649 #undef IS_SOLARIS_PT_INTERP
5650 #undef INCLUDE_SECTION_IN_SEGMENT
5651 #undef SEGMENT_AFTER_SEGMENT
5652 #undef SEGMENT_OVERLAPS
5656 /* Copy private section information. This copies over the entsize
5657 field, and sometimes the info field. */
5660 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5665 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5667 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5668 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5671 ihdr
= &elf_section_data (isec
)->this_hdr
;
5672 ohdr
= &elf_section_data (osec
)->this_hdr
;
5674 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5676 if (ihdr
->sh_type
== SHT_SYMTAB
5677 || ihdr
->sh_type
== SHT_DYNSYM
5678 || ihdr
->sh_type
== SHT_GNU_verneed
5679 || ihdr
->sh_type
== SHT_GNU_verdef
)
5680 ohdr
->sh_info
= ihdr
->sh_info
;
5682 /* Set things up for objcopy. The output SHT_GROUP section will
5683 have its elf_next_in_group pointing back to the input group
5684 members. Ignore linker created group section. See
5685 elfNN_ia64_object_p in elfxx-ia64.c. */
5686 if (elf_sec_group (isec
) == NULL
5687 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5689 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5690 elf_group_name (osec
) = elf_group_name (isec
);
5693 osec
->use_rela_p
= isec
->use_rela_p
;
5698 /* Copy private header information. */
5701 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5703 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5704 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5707 /* Copy over private BFD data if it has not already been copied.
5708 This must be done here, rather than in the copy_private_bfd_data
5709 entry point, because the latter is called after the section
5710 contents have been set, which means that the program headers have
5711 already been worked out. */
5712 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5714 if (! copy_private_bfd_data (ibfd
, obfd
))
5721 /* Copy private symbol information. If this symbol is in a section
5722 which we did not map into a BFD section, try to map the section
5723 index correctly. We use special macro definitions for the mapped
5724 section indices; these definitions are interpreted by the
5725 swap_out_syms function. */
5727 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5728 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5729 #define MAP_STRTAB (SHN_HIOS + 3)
5730 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5731 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5734 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5739 elf_symbol_type
*isym
, *osym
;
5741 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5742 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5745 isym
= elf_symbol_from (ibfd
, isymarg
);
5746 osym
= elf_symbol_from (obfd
, osymarg
);
5750 && bfd_is_abs_section (isym
->symbol
.section
))
5754 shndx
= isym
->internal_elf_sym
.st_shndx
;
5755 if (shndx
== elf_onesymtab (ibfd
))
5756 shndx
= MAP_ONESYMTAB
;
5757 else if (shndx
== elf_dynsymtab (ibfd
))
5758 shndx
= MAP_DYNSYMTAB
;
5759 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5761 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5762 shndx
= MAP_SHSTRTAB
;
5763 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5764 shndx
= MAP_SYM_SHNDX
;
5765 osym
->internal_elf_sym
.st_shndx
= shndx
;
5771 /* Swap out the symbols. */
5774 swap_out_syms (bfd
*abfd
,
5775 struct bfd_strtab_hash
**sttp
,
5778 const struct elf_backend_data
*bed
;
5781 struct bfd_strtab_hash
*stt
;
5782 Elf_Internal_Shdr
*symtab_hdr
;
5783 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5784 Elf_Internal_Shdr
*symstrtab_hdr
;
5785 bfd_byte
*outbound_syms
;
5786 bfd_byte
*outbound_shndx
;
5789 bfd_boolean name_local_sections
;
5791 if (!elf_map_symbols (abfd
))
5794 /* Dump out the symtabs. */
5795 stt
= _bfd_elf_stringtab_init ();
5799 bed
= get_elf_backend_data (abfd
);
5800 symcount
= bfd_get_symcount (abfd
);
5801 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5802 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5803 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5804 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5805 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5806 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5808 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5809 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5811 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5812 outbound_syms
= bfd_alloc (abfd
, amt
);
5813 if (outbound_syms
== NULL
)
5815 _bfd_stringtab_free (stt
);
5818 symtab_hdr
->contents
= outbound_syms
;
5820 outbound_shndx
= NULL
;
5821 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5822 if (symtab_shndx_hdr
->sh_name
!= 0)
5824 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5825 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5826 if (outbound_shndx
== NULL
)
5828 _bfd_stringtab_free (stt
);
5832 symtab_shndx_hdr
->contents
= outbound_shndx
;
5833 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5834 symtab_shndx_hdr
->sh_size
= amt
;
5835 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5836 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5839 /* Now generate the data (for "contents"). */
5841 /* Fill in zeroth symbol and swap it out. */
5842 Elf_Internal_Sym sym
;
5848 sym
.st_shndx
= SHN_UNDEF
;
5849 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5850 outbound_syms
+= bed
->s
->sizeof_sym
;
5851 if (outbound_shndx
!= NULL
)
5852 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5856 = (bed
->elf_backend_name_local_section_symbols
5857 && bed
->elf_backend_name_local_section_symbols (abfd
));
5859 syms
= bfd_get_outsymbols (abfd
);
5860 for (idx
= 0; idx
< symcount
; idx
++)
5862 Elf_Internal_Sym sym
;
5863 bfd_vma value
= syms
[idx
]->value
;
5864 elf_symbol_type
*type_ptr
;
5865 flagword flags
= syms
[idx
]->flags
;
5868 if (!name_local_sections
5869 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5871 /* Local section symbols have no name. */
5876 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5879 if (sym
.st_name
== (unsigned long) -1)
5881 _bfd_stringtab_free (stt
);
5886 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5888 if ((flags
& BSF_SECTION_SYM
) == 0
5889 && bfd_is_com_section (syms
[idx
]->section
))
5891 /* ELF common symbols put the alignment into the `value' field,
5892 and the size into the `size' field. This is backwards from
5893 how BFD handles it, so reverse it here. */
5894 sym
.st_size
= value
;
5895 if (type_ptr
== NULL
5896 || type_ptr
->internal_elf_sym
.st_value
== 0)
5897 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5899 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5900 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5901 (abfd
, syms
[idx
]->section
);
5905 asection
*sec
= syms
[idx
]->section
;
5908 if (sec
->output_section
)
5910 value
+= sec
->output_offset
;
5911 sec
= sec
->output_section
;
5914 /* Don't add in the section vma for relocatable output. */
5915 if (! relocatable_p
)
5917 sym
.st_value
= value
;
5918 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5920 if (bfd_is_abs_section (sec
)
5922 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5924 /* This symbol is in a real ELF section which we did
5925 not create as a BFD section. Undo the mapping done
5926 by copy_private_symbol_data. */
5927 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5931 shndx
= elf_onesymtab (abfd
);
5934 shndx
= elf_dynsymtab (abfd
);
5937 shndx
= elf_tdata (abfd
)->strtab_section
;
5940 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5943 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5951 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5957 /* Writing this would be a hell of a lot easier if
5958 we had some decent documentation on bfd, and
5959 knew what to expect of the library, and what to
5960 demand of applications. For example, it
5961 appears that `objcopy' might not set the
5962 section of a symbol to be a section that is
5963 actually in the output file. */
5964 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5967 _bfd_error_handler (_("\
5968 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5969 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5971 bfd_set_error (bfd_error_invalid_operation
);
5972 _bfd_stringtab_free (stt
);
5976 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5977 BFD_ASSERT (shndx
!= -1);
5981 sym
.st_shndx
= shndx
;
5984 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5986 else if ((flags
& BSF_FUNCTION
) != 0)
5988 else if ((flags
& BSF_OBJECT
) != 0)
5993 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5996 /* Processor-specific types. */
5997 if (type_ptr
!= NULL
5998 && bed
->elf_backend_get_symbol_type
)
5999 type
= ((*bed
->elf_backend_get_symbol_type
)
6000 (&type_ptr
->internal_elf_sym
, type
));
6002 if (flags
& BSF_SECTION_SYM
)
6004 if (flags
& BSF_GLOBAL
)
6005 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
6007 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
6009 else if (bfd_is_com_section (syms
[idx
]->section
))
6010 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
6011 else if (bfd_is_und_section (syms
[idx
]->section
))
6012 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
6016 else if (flags
& BSF_FILE
)
6017 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
6020 int bind
= STB_LOCAL
;
6022 if (flags
& BSF_LOCAL
)
6024 else if (flags
& BSF_WEAK
)
6026 else if (flags
& BSF_GLOBAL
)
6029 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6032 if (type_ptr
!= NULL
)
6033 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6037 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6038 outbound_syms
+= bed
->s
->sizeof_sym
;
6039 if (outbound_shndx
!= NULL
)
6040 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6044 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6045 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6047 symstrtab_hdr
->sh_flags
= 0;
6048 symstrtab_hdr
->sh_addr
= 0;
6049 symstrtab_hdr
->sh_entsize
= 0;
6050 symstrtab_hdr
->sh_link
= 0;
6051 symstrtab_hdr
->sh_info
= 0;
6052 symstrtab_hdr
->sh_addralign
= 1;
6057 /* Return the number of bytes required to hold the symtab vector.
6059 Note that we base it on the count plus 1, since we will null terminate
6060 the vector allocated based on this size. However, the ELF symbol table
6061 always has a dummy entry as symbol #0, so it ends up even. */
6064 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6068 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6070 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6071 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6073 symtab_size
-= sizeof (asymbol
*);
6079 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6083 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6085 if (elf_dynsymtab (abfd
) == 0)
6087 bfd_set_error (bfd_error_invalid_operation
);
6091 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6092 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6094 symtab_size
-= sizeof (asymbol
*);
6100 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6103 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6106 /* Canonicalize the relocs. */
6109 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6116 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6118 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6121 tblptr
= section
->relocation
;
6122 for (i
= 0; i
< section
->reloc_count
; i
++)
6123 *relptr
++ = tblptr
++;
6127 return section
->reloc_count
;
6131 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6133 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6134 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6137 bfd_get_symcount (abfd
) = symcount
;
6142 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6143 asymbol
**allocation
)
6145 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6146 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6149 bfd_get_dynamic_symcount (abfd
) = symcount
;
6153 /* Return the size required for the dynamic reloc entries. Any loadable
6154 section that was actually installed in the BFD, and has type SHT_REL
6155 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6156 dynamic reloc section. */
6159 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6164 if (elf_dynsymtab (abfd
) == 0)
6166 bfd_set_error (bfd_error_invalid_operation
);
6170 ret
= sizeof (arelent
*);
6171 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6172 if ((s
->flags
& SEC_LOAD
) != 0
6173 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6174 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6175 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6176 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6177 * sizeof (arelent
*));
6182 /* Canonicalize the dynamic relocation entries. Note that we return the
6183 dynamic relocations as a single block, although they are actually
6184 associated with particular sections; the interface, which was
6185 designed for SunOS style shared libraries, expects that there is only
6186 one set of dynamic relocs. Any loadable section that was actually
6187 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6188 dynamic symbol table, is considered to be a dynamic reloc section. */
6191 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6195 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6199 if (elf_dynsymtab (abfd
) == 0)
6201 bfd_set_error (bfd_error_invalid_operation
);
6205 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6207 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6209 if ((s
->flags
& SEC_LOAD
) != 0
6210 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6211 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6212 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6217 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6219 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6221 for (i
= 0; i
< count
; i
++)
6232 /* Read in the version information. */
6235 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6237 bfd_byte
*contents
= NULL
;
6239 unsigned int freeidx
= 0;
6241 if (elf_dynverref (abfd
) != 0)
6243 Elf_Internal_Shdr
*hdr
;
6244 Elf_External_Verneed
*everneed
;
6245 Elf_Internal_Verneed
*iverneed
;
6248 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6250 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6251 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6252 if (elf_tdata (abfd
)->verref
== NULL
)
6255 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6257 contents
= bfd_malloc (hdr
->sh_size
);
6258 if (contents
== NULL
)
6260 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6261 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6264 everneed
= (Elf_External_Verneed
*) contents
;
6265 iverneed
= elf_tdata (abfd
)->verref
;
6266 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6268 Elf_External_Vernaux
*evernaux
;
6269 Elf_Internal_Vernaux
*ivernaux
;
6272 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6274 iverneed
->vn_bfd
= abfd
;
6276 iverneed
->vn_filename
=
6277 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6279 if (iverneed
->vn_filename
== NULL
)
6282 amt
= iverneed
->vn_cnt
;
6283 amt
*= sizeof (Elf_Internal_Vernaux
);
6284 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6286 evernaux
= ((Elf_External_Vernaux
*)
6287 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6288 ivernaux
= iverneed
->vn_auxptr
;
6289 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6291 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6293 ivernaux
->vna_nodename
=
6294 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6295 ivernaux
->vna_name
);
6296 if (ivernaux
->vna_nodename
== NULL
)
6299 if (j
+ 1 < iverneed
->vn_cnt
)
6300 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6302 ivernaux
->vna_nextptr
= NULL
;
6304 evernaux
= ((Elf_External_Vernaux
*)
6305 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6307 if (ivernaux
->vna_other
> freeidx
)
6308 freeidx
= ivernaux
->vna_other
;
6311 if (i
+ 1 < hdr
->sh_info
)
6312 iverneed
->vn_nextref
= iverneed
+ 1;
6314 iverneed
->vn_nextref
= NULL
;
6316 everneed
= ((Elf_External_Verneed
*)
6317 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6324 if (elf_dynverdef (abfd
) != 0)
6326 Elf_Internal_Shdr
*hdr
;
6327 Elf_External_Verdef
*everdef
;
6328 Elf_Internal_Verdef
*iverdef
;
6329 Elf_Internal_Verdef
*iverdefarr
;
6330 Elf_Internal_Verdef iverdefmem
;
6332 unsigned int maxidx
;
6334 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6336 contents
= bfd_malloc (hdr
->sh_size
);
6337 if (contents
== NULL
)
6339 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6340 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6343 /* We know the number of entries in the section but not the maximum
6344 index. Therefore we have to run through all entries and find
6346 everdef
= (Elf_External_Verdef
*) contents
;
6348 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6350 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6352 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6353 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6355 everdef
= ((Elf_External_Verdef
*)
6356 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6359 if (default_imported_symver
)
6361 if (freeidx
> maxidx
)
6366 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6367 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6368 if (elf_tdata (abfd
)->verdef
== NULL
)
6371 elf_tdata (abfd
)->cverdefs
= maxidx
;
6373 everdef
= (Elf_External_Verdef
*) contents
;
6374 iverdefarr
= elf_tdata (abfd
)->verdef
;
6375 for (i
= 0; i
< hdr
->sh_info
; i
++)
6377 Elf_External_Verdaux
*everdaux
;
6378 Elf_Internal_Verdaux
*iverdaux
;
6381 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6383 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6384 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6386 iverdef
->vd_bfd
= abfd
;
6388 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6389 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6390 if (iverdef
->vd_auxptr
== NULL
)
6393 everdaux
= ((Elf_External_Verdaux
*)
6394 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6395 iverdaux
= iverdef
->vd_auxptr
;
6396 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6398 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6400 iverdaux
->vda_nodename
=
6401 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6402 iverdaux
->vda_name
);
6403 if (iverdaux
->vda_nodename
== NULL
)
6406 if (j
+ 1 < iverdef
->vd_cnt
)
6407 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6409 iverdaux
->vda_nextptr
= NULL
;
6411 everdaux
= ((Elf_External_Verdaux
*)
6412 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6415 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6417 if (i
+ 1 < hdr
->sh_info
)
6418 iverdef
->vd_nextdef
= iverdef
+ 1;
6420 iverdef
->vd_nextdef
= NULL
;
6422 everdef
= ((Elf_External_Verdef
*)
6423 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6429 else if (default_imported_symver
)
6436 amt
= (bfd_size_type
) freeidx
* sizeof (Elf_Internal_Verdef
);
6437 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6438 if (elf_tdata (abfd
)->verdef
== NULL
)
6441 elf_tdata (abfd
)->cverdefs
= freeidx
;
6444 /* Create a default version based on the soname. */
6445 if (default_imported_symver
)
6447 Elf_Internal_Verdef
*iverdef
;
6448 Elf_Internal_Verdaux
*iverdaux
;
6450 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6452 iverdef
->vd_version
= VER_DEF_CURRENT
;
6453 iverdef
->vd_flags
= 0;
6454 iverdef
->vd_ndx
= freeidx
;
6455 iverdef
->vd_cnt
= 1;
6457 iverdef
->vd_bfd
= abfd
;
6459 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6460 if (iverdef
->vd_nodename
== NULL
)
6462 iverdef
->vd_nextdef
= NULL
;
6463 amt
= (bfd_size_type
) sizeof (Elf_Internal_Verdaux
);
6464 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6466 iverdaux
= iverdef
->vd_auxptr
;
6467 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6468 iverdaux
->vda_nextptr
= NULL
;
6474 if (contents
!= NULL
)
6480 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6482 elf_symbol_type
*newsym
;
6483 bfd_size_type amt
= sizeof (elf_symbol_type
);
6485 newsym
= bfd_zalloc (abfd
, amt
);
6490 newsym
->symbol
.the_bfd
= abfd
;
6491 return &newsym
->symbol
;
6496 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6500 bfd_symbol_info (symbol
, ret
);
6503 /* Return whether a symbol name implies a local symbol. Most targets
6504 use this function for the is_local_label_name entry point, but some
6508 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6511 /* Normal local symbols start with ``.L''. */
6512 if (name
[0] == '.' && name
[1] == 'L')
6515 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6516 DWARF debugging symbols starting with ``..''. */
6517 if (name
[0] == '.' && name
[1] == '.')
6520 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6521 emitting DWARF debugging output. I suspect this is actually a
6522 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6523 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6524 underscore to be emitted on some ELF targets). For ease of use,
6525 we treat such symbols as local. */
6526 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6533 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6534 asymbol
*symbol ATTRIBUTE_UNUSED
)
6541 _bfd_elf_set_arch_mach (bfd
*abfd
,
6542 enum bfd_architecture arch
,
6543 unsigned long machine
)
6545 /* If this isn't the right architecture for this backend, and this
6546 isn't the generic backend, fail. */
6547 if (arch
!= get_elf_backend_data (abfd
)->arch
6548 && arch
!= bfd_arch_unknown
6549 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6552 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6555 /* Find the function to a particular section and offset,
6556 for error reporting. */
6559 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6563 const char **filename_ptr
,
6564 const char **functionname_ptr
)
6566 const char *filename
;
6567 asymbol
*func
, *file
;
6570 /* ??? Given multiple file symbols, it is impossible to reliably
6571 choose the right file name for global symbols. File symbols are
6572 local symbols, and thus all file symbols must sort before any
6573 global symbols. The ELF spec may be interpreted to say that a
6574 file symbol must sort before other local symbols, but currently
6575 ld -r doesn't do this. So, for ld -r output, it is possible to
6576 make a better choice of file name for local symbols by ignoring
6577 file symbols appearing after a given local symbol. */
6578 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6584 state
= nothing_seen
;
6586 for (p
= symbols
; *p
!= NULL
; p
++)
6590 q
= (elf_symbol_type
*) *p
;
6592 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6598 if (state
== symbol_seen
)
6599 state
= file_after_symbol_seen
;
6605 if (bfd_get_section (&q
->symbol
) == section
6606 && q
->symbol
.value
>= low_func
6607 && q
->symbol
.value
<= offset
)
6609 func
= (asymbol
*) q
;
6610 low_func
= q
->symbol
.value
;
6613 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6614 && state
== file_after_symbol_seen
)
6617 filename
= bfd_asymbol_name (file
);
6621 if (state
== nothing_seen
)
6622 state
= symbol_seen
;
6629 *filename_ptr
= filename
;
6630 if (functionname_ptr
)
6631 *functionname_ptr
= bfd_asymbol_name (func
);
6636 /* Find the nearest line to a particular section and offset,
6637 for error reporting. */
6640 _bfd_elf_find_nearest_line (bfd
*abfd
,
6644 const char **filename_ptr
,
6645 const char **functionname_ptr
,
6646 unsigned int *line_ptr
)
6650 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6651 filename_ptr
, functionname_ptr
,
6654 if (!*functionname_ptr
)
6655 elf_find_function (abfd
, section
, symbols
, offset
,
6656 *filename_ptr
? NULL
: filename_ptr
,
6662 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6663 filename_ptr
, functionname_ptr
,
6665 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6667 if (!*functionname_ptr
)
6668 elf_find_function (abfd
, section
, symbols
, offset
,
6669 *filename_ptr
? NULL
: filename_ptr
,
6675 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6676 &found
, filename_ptr
,
6677 functionname_ptr
, line_ptr
,
6678 &elf_tdata (abfd
)->line_info
))
6680 if (found
&& (*functionname_ptr
|| *line_ptr
))
6683 if (symbols
== NULL
)
6686 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6687 filename_ptr
, functionname_ptr
))
6694 /* Find the line for a symbol. */
6697 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6698 const char **filename_ptr
, unsigned int *line_ptr
)
6700 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6701 filename_ptr
, line_ptr
, 0,
6702 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6705 /* After a call to bfd_find_nearest_line, successive calls to
6706 bfd_find_inliner_info can be used to get source information about
6707 each level of function inlining that terminated at the address
6708 passed to bfd_find_nearest_line. Currently this is only supported
6709 for DWARF2 with appropriate DWARF3 extensions. */
6712 _bfd_elf_find_inliner_info (bfd
*abfd
,
6713 const char **filename_ptr
,
6714 const char **functionname_ptr
,
6715 unsigned int *line_ptr
)
6718 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
6719 functionname_ptr
, line_ptr
,
6720 & elf_tdata (abfd
)->dwarf2_find_line_info
);
6725 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6729 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6731 ret
+= get_program_header_size (abfd
);
6736 _bfd_elf_set_section_contents (bfd
*abfd
,
6738 const void *location
,
6740 bfd_size_type count
)
6742 Elf_Internal_Shdr
*hdr
;
6745 if (! abfd
->output_has_begun
6746 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6749 hdr
= &elf_section_data (section
)->this_hdr
;
6750 pos
= hdr
->sh_offset
+ offset
;
6751 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6752 || bfd_bwrite (location
, count
, abfd
) != count
)
6759 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6760 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6761 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6766 /* Try to convert a non-ELF reloc into an ELF one. */
6769 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6771 /* Check whether we really have an ELF howto. */
6773 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6775 bfd_reloc_code_real_type code
;
6776 reloc_howto_type
*howto
;
6778 /* Alien reloc: Try to determine its type to replace it with an
6779 equivalent ELF reloc. */
6781 if (areloc
->howto
->pc_relative
)
6783 switch (areloc
->howto
->bitsize
)
6786 code
= BFD_RELOC_8_PCREL
;
6789 code
= BFD_RELOC_12_PCREL
;
6792 code
= BFD_RELOC_16_PCREL
;
6795 code
= BFD_RELOC_24_PCREL
;
6798 code
= BFD_RELOC_32_PCREL
;
6801 code
= BFD_RELOC_64_PCREL
;
6807 howto
= bfd_reloc_type_lookup (abfd
, code
);
6809 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6811 if (howto
->pcrel_offset
)
6812 areloc
->addend
+= areloc
->address
;
6814 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6819 switch (areloc
->howto
->bitsize
)
6825 code
= BFD_RELOC_14
;
6828 code
= BFD_RELOC_16
;
6831 code
= BFD_RELOC_26
;
6834 code
= BFD_RELOC_32
;
6837 code
= BFD_RELOC_64
;
6843 howto
= bfd_reloc_type_lookup (abfd
, code
);
6847 areloc
->howto
= howto
;
6855 (*_bfd_error_handler
)
6856 (_("%B: unsupported relocation type %s"),
6857 abfd
, areloc
->howto
->name
);
6858 bfd_set_error (bfd_error_bad_value
);
6863 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6865 if (bfd_get_format (abfd
) == bfd_object
)
6867 if (elf_shstrtab (abfd
) != NULL
)
6868 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6869 _bfd_dwarf2_cleanup_debug_info (abfd
);
6872 return _bfd_generic_close_and_cleanup (abfd
);
6875 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6876 in the relocation's offset. Thus we cannot allow any sort of sanity
6877 range-checking to interfere. There is nothing else to do in processing
6880 bfd_reloc_status_type
6881 _bfd_elf_rel_vtable_reloc_fn
6882 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6883 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6884 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6885 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6887 return bfd_reloc_ok
;
6890 /* Elf core file support. Much of this only works on native
6891 toolchains, since we rely on knowing the
6892 machine-dependent procfs structure in order to pick
6893 out details about the corefile. */
6895 #ifdef HAVE_SYS_PROCFS_H
6896 # include <sys/procfs.h>
6899 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6902 elfcore_make_pid (bfd
*abfd
)
6904 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6905 + (elf_tdata (abfd
)->core_pid
));
6908 /* If there isn't a section called NAME, make one, using
6909 data from SECT. Note, this function will generate a
6910 reference to NAME, so you shouldn't deallocate or
6914 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6918 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6921 sect2
= bfd_make_section (abfd
, name
);
6925 sect2
->size
= sect
->size
;
6926 sect2
->filepos
= sect
->filepos
;
6927 sect2
->flags
= sect
->flags
;
6928 sect2
->alignment_power
= sect
->alignment_power
;
6932 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6933 actually creates up to two pseudosections:
6934 - For the single-threaded case, a section named NAME, unless
6935 such a section already exists.
6936 - For the multi-threaded case, a section named "NAME/PID", where
6937 PID is elfcore_make_pid (abfd).
6938 Both pseudosections have identical contents. */
6940 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6946 char *threaded_name
;
6950 /* Build the section name. */
6952 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6953 len
= strlen (buf
) + 1;
6954 threaded_name
= bfd_alloc (abfd
, len
);
6955 if (threaded_name
== NULL
)
6957 memcpy (threaded_name
, buf
, len
);
6959 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6963 sect
->filepos
= filepos
;
6964 sect
->flags
= SEC_HAS_CONTENTS
;
6965 sect
->alignment_power
= 2;
6967 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6970 /* prstatus_t exists on:
6972 linux 2.[01] + glibc
6976 #if defined (HAVE_PRSTATUS_T)
6979 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6984 if (note
->descsz
== sizeof (prstatus_t
))
6988 size
= sizeof (prstat
.pr_reg
);
6989 offset
= offsetof (prstatus_t
, pr_reg
);
6990 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6992 /* Do not overwrite the core signal if it
6993 has already been set by another thread. */
6994 if (elf_tdata (abfd
)->core_signal
== 0)
6995 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6996 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6998 /* pr_who exists on:
7001 pr_who doesn't exist on:
7004 #if defined (HAVE_PRSTATUS_T_PR_WHO)
7005 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7008 #if defined (HAVE_PRSTATUS32_T)
7009 else if (note
->descsz
== sizeof (prstatus32_t
))
7011 /* 64-bit host, 32-bit corefile */
7012 prstatus32_t prstat
;
7014 size
= sizeof (prstat
.pr_reg
);
7015 offset
= offsetof (prstatus32_t
, pr_reg
);
7016 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7018 /* Do not overwrite the core signal if it
7019 has already been set by another thread. */
7020 if (elf_tdata (abfd
)->core_signal
== 0)
7021 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7022 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7024 /* pr_who exists on:
7027 pr_who doesn't exist on:
7030 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7031 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7034 #endif /* HAVE_PRSTATUS32_T */
7037 /* Fail - we don't know how to handle any other
7038 note size (ie. data object type). */
7042 /* Make a ".reg/999" section and a ".reg" section. */
7043 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7044 size
, note
->descpos
+ offset
);
7046 #endif /* defined (HAVE_PRSTATUS_T) */
7048 /* Create a pseudosection containing the exact contents of NOTE. */
7050 elfcore_make_note_pseudosection (bfd
*abfd
,
7052 Elf_Internal_Note
*note
)
7054 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7055 note
->descsz
, note
->descpos
);
7058 /* There isn't a consistent prfpregset_t across platforms,
7059 but it doesn't matter, because we don't have to pick this
7060 data structure apart. */
7063 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7065 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7068 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7069 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7073 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7075 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7078 #if defined (HAVE_PRPSINFO_T)
7079 typedef prpsinfo_t elfcore_psinfo_t
;
7080 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7081 typedef prpsinfo32_t elfcore_psinfo32_t
;
7085 #if defined (HAVE_PSINFO_T)
7086 typedef psinfo_t elfcore_psinfo_t
;
7087 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7088 typedef psinfo32_t elfcore_psinfo32_t
;
7092 /* return a malloc'ed copy of a string at START which is at
7093 most MAX bytes long, possibly without a terminating '\0'.
7094 the copy will always have a terminating '\0'. */
7097 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7100 char *end
= memchr (start
, '\0', max
);
7108 dups
= bfd_alloc (abfd
, len
+ 1);
7112 memcpy (dups
, start
, len
);
7118 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7120 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7122 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7124 elfcore_psinfo_t psinfo
;
7126 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7128 elf_tdata (abfd
)->core_program
7129 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7130 sizeof (psinfo
.pr_fname
));
7132 elf_tdata (abfd
)->core_command
7133 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7134 sizeof (psinfo
.pr_psargs
));
7136 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7137 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7139 /* 64-bit host, 32-bit corefile */
7140 elfcore_psinfo32_t psinfo
;
7142 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7144 elf_tdata (abfd
)->core_program
7145 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7146 sizeof (psinfo
.pr_fname
));
7148 elf_tdata (abfd
)->core_command
7149 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7150 sizeof (psinfo
.pr_psargs
));
7156 /* Fail - we don't know how to handle any other
7157 note size (ie. data object type). */
7161 /* Note that for some reason, a spurious space is tacked
7162 onto the end of the args in some (at least one anyway)
7163 implementations, so strip it off if it exists. */
7166 char *command
= elf_tdata (abfd
)->core_command
;
7167 int n
= strlen (command
);
7169 if (0 < n
&& command
[n
- 1] == ' ')
7170 command
[n
- 1] = '\0';
7175 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7177 #if defined (HAVE_PSTATUS_T)
7179 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7181 if (note
->descsz
== sizeof (pstatus_t
)
7182 #if defined (HAVE_PXSTATUS_T)
7183 || note
->descsz
== sizeof (pxstatus_t
)
7189 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7191 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7193 #if defined (HAVE_PSTATUS32_T)
7194 else if (note
->descsz
== sizeof (pstatus32_t
))
7196 /* 64-bit host, 32-bit corefile */
7199 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7201 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7204 /* Could grab some more details from the "representative"
7205 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7206 NT_LWPSTATUS note, presumably. */
7210 #endif /* defined (HAVE_PSTATUS_T) */
7212 #if defined (HAVE_LWPSTATUS_T)
7214 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7216 lwpstatus_t lwpstat
;
7222 if (note
->descsz
!= sizeof (lwpstat
)
7223 #if defined (HAVE_LWPXSTATUS_T)
7224 && note
->descsz
!= sizeof (lwpxstatus_t
)
7229 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7231 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7232 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7234 /* Make a ".reg/999" section. */
7236 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7237 len
= strlen (buf
) + 1;
7238 name
= bfd_alloc (abfd
, len
);
7241 memcpy (name
, buf
, len
);
7243 sect
= bfd_make_section_anyway (abfd
, name
);
7247 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7248 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7249 sect
->filepos
= note
->descpos
7250 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7253 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7254 sect
->size
= sizeof (lwpstat
.pr_reg
);
7255 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7258 sect
->flags
= SEC_HAS_CONTENTS
;
7259 sect
->alignment_power
= 2;
7261 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7264 /* Make a ".reg2/999" section */
7266 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7267 len
= strlen (buf
) + 1;
7268 name
= bfd_alloc (abfd
, len
);
7271 memcpy (name
, buf
, len
);
7273 sect
= bfd_make_section_anyway (abfd
, name
);
7277 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7278 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7279 sect
->filepos
= note
->descpos
7280 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7283 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7284 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7285 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7288 sect
->flags
= SEC_HAS_CONTENTS
;
7289 sect
->alignment_power
= 2;
7291 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7293 #endif /* defined (HAVE_LWPSTATUS_T) */
7295 #if defined (HAVE_WIN32_PSTATUS_T)
7297 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7303 win32_pstatus_t pstatus
;
7305 if (note
->descsz
< sizeof (pstatus
))
7308 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7310 switch (pstatus
.data_type
)
7312 case NOTE_INFO_PROCESS
:
7313 /* FIXME: need to add ->core_command. */
7314 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7315 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7318 case NOTE_INFO_THREAD
:
7319 /* Make a ".reg/999" section. */
7320 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7322 len
= strlen (buf
) + 1;
7323 name
= bfd_alloc (abfd
, len
);
7327 memcpy (name
, buf
, len
);
7329 sect
= bfd_make_section_anyway (abfd
, name
);
7333 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7334 sect
->filepos
= (note
->descpos
7335 + offsetof (struct win32_pstatus
,
7336 data
.thread_info
.thread_context
));
7337 sect
->flags
= SEC_HAS_CONTENTS
;
7338 sect
->alignment_power
= 2;
7340 if (pstatus
.data
.thread_info
.is_active_thread
)
7341 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7345 case NOTE_INFO_MODULE
:
7346 /* Make a ".module/xxxxxxxx" section. */
7347 sprintf (buf
, ".module/%08lx",
7348 (long) pstatus
.data
.module_info
.base_address
);
7350 len
= strlen (buf
) + 1;
7351 name
= bfd_alloc (abfd
, len
);
7355 memcpy (name
, buf
, len
);
7357 sect
= bfd_make_section_anyway (abfd
, name
);
7362 sect
->size
= note
->descsz
;
7363 sect
->filepos
= note
->descpos
;
7364 sect
->flags
= SEC_HAS_CONTENTS
;
7365 sect
->alignment_power
= 2;
7374 #endif /* HAVE_WIN32_PSTATUS_T */
7377 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7379 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7387 if (bed
->elf_backend_grok_prstatus
)
7388 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7390 #if defined (HAVE_PRSTATUS_T)
7391 return elfcore_grok_prstatus (abfd
, note
);
7396 #if defined (HAVE_PSTATUS_T)
7398 return elfcore_grok_pstatus (abfd
, note
);
7401 #if defined (HAVE_LWPSTATUS_T)
7403 return elfcore_grok_lwpstatus (abfd
, note
);
7406 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7407 return elfcore_grok_prfpreg (abfd
, note
);
7409 #if defined (HAVE_WIN32_PSTATUS_T)
7410 case NT_WIN32PSTATUS
:
7411 return elfcore_grok_win32pstatus (abfd
, note
);
7414 case NT_PRXFPREG
: /* Linux SSE extension */
7415 if (note
->namesz
== 6
7416 && strcmp (note
->namedata
, "LINUX") == 0)
7417 return elfcore_grok_prxfpreg (abfd
, note
);
7423 if (bed
->elf_backend_grok_psinfo
)
7424 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7426 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7427 return elfcore_grok_psinfo (abfd
, note
);
7434 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7438 sect
->size
= note
->descsz
;
7439 sect
->filepos
= note
->descpos
;
7440 sect
->flags
= SEC_HAS_CONTENTS
;
7441 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7449 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7453 cp
= strchr (note
->namedata
, '@');
7456 *lwpidp
= atoi(cp
+ 1);
7463 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7466 /* Signal number at offset 0x08. */
7467 elf_tdata (abfd
)->core_signal
7468 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7470 /* Process ID at offset 0x50. */
7471 elf_tdata (abfd
)->core_pid
7472 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7474 /* Command name at 0x7c (max 32 bytes, including nul). */
7475 elf_tdata (abfd
)->core_command
7476 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7478 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7483 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7487 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7488 elf_tdata (abfd
)->core_lwpid
= lwp
;
7490 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7492 /* NetBSD-specific core "procinfo". Note that we expect to
7493 find this note before any of the others, which is fine,
7494 since the kernel writes this note out first when it
7495 creates a core file. */
7497 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7500 /* As of Jan 2002 there are no other machine-independent notes
7501 defined for NetBSD core files. If the note type is less
7502 than the start of the machine-dependent note types, we don't
7505 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7509 switch (bfd_get_arch (abfd
))
7511 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7512 PT_GETFPREGS == mach+2. */
7514 case bfd_arch_alpha
:
7515 case bfd_arch_sparc
:
7518 case NT_NETBSDCORE_FIRSTMACH
+0:
7519 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7521 case NT_NETBSDCORE_FIRSTMACH
+2:
7522 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7528 /* On all other arch's, PT_GETREGS == mach+1 and
7529 PT_GETFPREGS == mach+3. */
7534 case NT_NETBSDCORE_FIRSTMACH
+1:
7535 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7537 case NT_NETBSDCORE_FIRSTMACH
+3:
7538 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7548 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7550 void *ddata
= note
->descdata
;
7557 /* nto_procfs_status 'pid' field is at offset 0. */
7558 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7560 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7561 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7563 /* nto_procfs_status 'flags' field is at offset 8. */
7564 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7566 /* nto_procfs_status 'what' field is at offset 14. */
7567 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7569 elf_tdata (abfd
)->core_signal
= sig
;
7570 elf_tdata (abfd
)->core_lwpid
= *tid
;
7573 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7574 do not come from signals so we make sure we set the current
7575 thread just in case. */
7576 if (flags
& 0x00000080)
7577 elf_tdata (abfd
)->core_lwpid
= *tid
;
7579 /* Make a ".qnx_core_status/%d" section. */
7580 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7582 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7587 sect
= bfd_make_section_anyway (abfd
, name
);
7591 sect
->size
= note
->descsz
;
7592 sect
->filepos
= note
->descpos
;
7593 sect
->flags
= SEC_HAS_CONTENTS
;
7594 sect
->alignment_power
= 2;
7596 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7600 elfcore_grok_nto_regs (bfd
*abfd
,
7601 Elf_Internal_Note
*note
,
7609 /* Make a "(base)/%d" section. */
7610 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7612 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7617 sect
= bfd_make_section_anyway (abfd
, name
);
7621 sect
->size
= note
->descsz
;
7622 sect
->filepos
= note
->descpos
;
7623 sect
->flags
= SEC_HAS_CONTENTS
;
7624 sect
->alignment_power
= 2;
7626 /* This is the current thread. */
7627 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7628 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7633 #define BFD_QNT_CORE_INFO 7
7634 #define BFD_QNT_CORE_STATUS 8
7635 #define BFD_QNT_CORE_GREG 9
7636 #define BFD_QNT_CORE_FPREG 10
7639 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7641 /* Every GREG section has a STATUS section before it. Store the
7642 tid from the previous call to pass down to the next gregs
7644 static pid_t tid
= 1;
7648 case BFD_QNT_CORE_INFO
:
7649 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7650 case BFD_QNT_CORE_STATUS
:
7651 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7652 case BFD_QNT_CORE_GREG
:
7653 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7654 case BFD_QNT_CORE_FPREG
:
7655 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7661 /* Function: elfcore_write_note
7668 size of data for note
7671 End of buffer containing note. */
7674 elfcore_write_note (bfd
*abfd
,
7682 Elf_External_Note
*xnp
;
7692 const struct elf_backend_data
*bed
;
7694 namesz
= strlen (name
) + 1;
7695 bed
= get_elf_backend_data (abfd
);
7696 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7699 newspace
= 12 + namesz
+ pad
+ size
;
7701 p
= realloc (buf
, *bufsiz
+ newspace
);
7703 *bufsiz
+= newspace
;
7704 xnp
= (Elf_External_Note
*) dest
;
7705 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7706 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7707 H_PUT_32 (abfd
, type
, xnp
->type
);
7711 memcpy (dest
, name
, namesz
);
7719 memcpy (dest
, input
, size
);
7723 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7725 elfcore_write_prpsinfo (bfd
*abfd
,
7732 char *note_name
= "CORE";
7734 #if defined (HAVE_PSINFO_T)
7736 note_type
= NT_PSINFO
;
7739 note_type
= NT_PRPSINFO
;
7742 memset (&data
, 0, sizeof (data
));
7743 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7744 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7745 return elfcore_write_note (abfd
, buf
, bufsiz
,
7746 note_name
, note_type
, &data
, sizeof (data
));
7748 #endif /* PSINFO_T or PRPSINFO_T */
7750 #if defined (HAVE_PRSTATUS_T)
7752 elfcore_write_prstatus (bfd
*abfd
,
7760 char *note_name
= "CORE";
7762 memset (&prstat
, 0, sizeof (prstat
));
7763 prstat
.pr_pid
= pid
;
7764 prstat
.pr_cursig
= cursig
;
7765 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7766 return elfcore_write_note (abfd
, buf
, bufsiz
,
7767 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7769 #endif /* HAVE_PRSTATUS_T */
7771 #if defined (HAVE_LWPSTATUS_T)
7773 elfcore_write_lwpstatus (bfd
*abfd
,
7780 lwpstatus_t lwpstat
;
7781 char *note_name
= "CORE";
7783 memset (&lwpstat
, 0, sizeof (lwpstat
));
7784 lwpstat
.pr_lwpid
= pid
>> 16;
7785 lwpstat
.pr_cursig
= cursig
;
7786 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7787 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7788 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7790 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7791 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7793 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7794 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7797 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7798 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7800 #endif /* HAVE_LWPSTATUS_T */
7802 #if defined (HAVE_PSTATUS_T)
7804 elfcore_write_pstatus (bfd
*abfd
,
7812 char *note_name
= "CORE";
7814 memset (&pstat
, 0, sizeof (pstat
));
7815 pstat
.pr_pid
= pid
& 0xffff;
7816 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7817 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7820 #endif /* HAVE_PSTATUS_T */
7823 elfcore_write_prfpreg (bfd
*abfd
,
7829 char *note_name
= "CORE";
7830 return elfcore_write_note (abfd
, buf
, bufsiz
,
7831 note_name
, NT_FPREGSET
, fpregs
, size
);
7835 elfcore_write_prxfpreg (bfd
*abfd
,
7838 const void *xfpregs
,
7841 char *note_name
= "LINUX";
7842 return elfcore_write_note (abfd
, buf
, bufsiz
,
7843 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7847 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7855 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7858 buf
= bfd_malloc (size
);
7862 if (bfd_bread (buf
, size
, abfd
) != size
)
7870 while (p
< buf
+ size
)
7872 /* FIXME: bad alignment assumption. */
7873 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7874 Elf_Internal_Note in
;
7876 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7878 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7879 in
.namedata
= xnp
->name
;
7881 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7882 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7883 in
.descpos
= offset
+ (in
.descdata
- buf
);
7885 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7887 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7890 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7892 if (! elfcore_grok_nto_note (abfd
, &in
))
7897 if (! elfcore_grok_note (abfd
, &in
))
7901 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7908 /* Providing external access to the ELF program header table. */
7910 /* Return an upper bound on the number of bytes required to store a
7911 copy of ABFD's program header table entries. Return -1 if an error
7912 occurs; bfd_get_error will return an appropriate code. */
7915 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7917 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7919 bfd_set_error (bfd_error_wrong_format
);
7923 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7926 /* Copy ABFD's program header table entries to *PHDRS. The entries
7927 will be stored as an array of Elf_Internal_Phdr structures, as
7928 defined in include/elf/internal.h. To find out how large the
7929 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7931 Return the number of program header table entries read, or -1 if an
7932 error occurs; bfd_get_error will return an appropriate code. */
7935 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7939 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7941 bfd_set_error (bfd_error_wrong_format
);
7945 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7946 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7947 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7953 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7956 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7958 i_ehdrp
= elf_elfheader (abfd
);
7959 if (i_ehdrp
== NULL
)
7960 sprintf_vma (buf
, value
);
7963 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7965 #if BFD_HOST_64BIT_LONG
7966 sprintf (buf
, "%016lx", value
);
7968 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7969 _bfd_int64_low (value
));
7973 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7976 sprintf_vma (buf
, value
);
7981 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7984 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7986 i_ehdrp
= elf_elfheader (abfd
);
7987 if (i_ehdrp
== NULL
)
7988 fprintf_vma ((FILE *) stream
, value
);
7991 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7993 #if BFD_HOST_64BIT_LONG
7994 fprintf ((FILE *) stream
, "%016lx", value
);
7996 fprintf ((FILE *) stream
, "%08lx%08lx",
7997 _bfd_int64_high (value
), _bfd_int64_low (value
));
8001 fprintf ((FILE *) stream
, "%08lx",
8002 (unsigned long) (value
& 0xffffffff));
8005 fprintf_vma ((FILE *) stream
, value
);
8009 enum elf_reloc_type_class
8010 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8012 return reloc_class_normal
;
8015 /* For RELA architectures, return the relocation value for a
8016 relocation against a local symbol. */
8019 _bfd_elf_rela_local_sym (bfd
*abfd
,
8020 Elf_Internal_Sym
*sym
,
8022 Elf_Internal_Rela
*rel
)
8024 asection
*sec
= *psec
;
8027 relocation
= (sec
->output_section
->vma
8028 + sec
->output_offset
8030 if ((sec
->flags
& SEC_MERGE
)
8031 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8032 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8035 _bfd_merged_section_offset (abfd
, psec
,
8036 elf_section_data (sec
)->sec_info
,
8037 sym
->st_value
+ rel
->r_addend
);
8040 /* If we have changed the section, and our original section is
8041 marked with SEC_EXCLUDE, it means that the original
8042 SEC_MERGE section has been completely subsumed in some
8043 other SEC_MERGE section. In this case, we need to leave
8044 some info around for --emit-relocs. */
8045 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8046 sec
->kept_section
= *psec
;
8049 rel
->r_addend
-= relocation
;
8050 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8056 _bfd_elf_rel_local_sym (bfd
*abfd
,
8057 Elf_Internal_Sym
*sym
,
8061 asection
*sec
= *psec
;
8063 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8064 return sym
->st_value
+ addend
;
8066 return _bfd_merged_section_offset (abfd
, psec
,
8067 elf_section_data (sec
)->sec_info
,
8068 sym
->st_value
+ addend
);
8072 _bfd_elf_section_offset (bfd
*abfd
,
8073 struct bfd_link_info
*info
,
8077 switch (sec
->sec_info_type
)
8079 case ELF_INFO_TYPE_STABS
:
8080 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8082 case ELF_INFO_TYPE_EH_FRAME
:
8083 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8089 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8090 reconstruct an ELF file by reading the segments out of remote memory
8091 based on the ELF file header at EHDR_VMA and the ELF program headers it
8092 points to. If not null, *LOADBASEP is filled in with the difference
8093 between the VMAs from which the segments were read, and the VMAs the
8094 file headers (and hence BFD's idea of each section's VMA) put them at.
8096 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8097 remote memory at target address VMA into the local buffer at MYADDR; it
8098 should return zero on success or an `errno' code on failure. TEMPL must
8099 be a BFD for an ELF target with the word size and byte order found in
8100 the remote memory. */
8103 bfd_elf_bfd_from_remote_memory
8107 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8109 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8110 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8114 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8115 long symcount ATTRIBUTE_UNUSED
,
8116 asymbol
**syms ATTRIBUTE_UNUSED
,
8121 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8124 const char *relplt_name
;
8125 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8129 Elf_Internal_Shdr
*hdr
;
8135 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8138 if (dynsymcount
<= 0)
8141 if (!bed
->plt_sym_val
)
8144 relplt_name
= bed
->relplt_name
;
8145 if (relplt_name
== NULL
)
8146 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8147 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8151 hdr
= &elf_section_data (relplt
)->this_hdr
;
8152 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8153 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8156 plt
= bfd_get_section_by_name (abfd
, ".plt");
8160 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8161 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8164 count
= relplt
->size
/ hdr
->sh_entsize
;
8165 size
= count
* sizeof (asymbol
);
8166 p
= relplt
->relocation
;
8167 for (i
= 0; i
< count
; i
++, s
++, p
++)
8168 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8170 s
= *ret
= bfd_malloc (size
);
8174 names
= (char *) (s
+ count
);
8175 p
= relplt
->relocation
;
8177 for (i
= 0; i
< count
; i
++, s
++, p
++)
8182 addr
= bed
->plt_sym_val (i
, plt
, p
);
8183 if (addr
== (bfd_vma
) -1)
8186 *s
= **p
->sym_ptr_ptr
;
8188 s
->value
= addr
- plt
->vma
;
8190 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8191 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8193 memcpy (names
, "@plt", sizeof ("@plt"));
8194 names
+= sizeof ("@plt");
8201 /* Sort symbol by binding and section. We want to put definitions
8202 sorted by section at the beginning. */
8205 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8207 const Elf_Internal_Sym
*s1
;
8208 const Elf_Internal_Sym
*s2
;
8211 /* Make sure that undefined symbols are at the end. */
8212 s1
= (const Elf_Internal_Sym
*) arg1
;
8213 if (s1
->st_shndx
== SHN_UNDEF
)
8215 s2
= (const Elf_Internal_Sym
*) arg2
;
8216 if (s2
->st_shndx
== SHN_UNDEF
)
8219 /* Sorted by section index. */
8220 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8224 /* Sorted by binding. */
8225 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8230 Elf_Internal_Sym
*sym
;
8235 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8237 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8238 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8239 return strcmp (s1
->name
, s2
->name
);
8242 /* Check if 2 sections define the same set of local and global
8246 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8249 const struct elf_backend_data
*bed1
, *bed2
;
8250 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8251 bfd_size_type symcount1
, symcount2
;
8252 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8253 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8254 Elf_Internal_Sym
*isymend
;
8255 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8256 bfd_size_type count1
, count2
, i
;
8263 /* If both are .gnu.linkonce sections, they have to have the same
8265 if (strncmp (sec1
->name
, ".gnu.linkonce",
8266 sizeof ".gnu.linkonce" - 1) == 0
8267 && strncmp (sec2
->name
, ".gnu.linkonce",
8268 sizeof ".gnu.linkonce" - 1) == 0)
8269 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8270 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8272 /* Both sections have to be in ELF. */
8273 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8274 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8277 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8280 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8281 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8283 /* If both are members of section groups, they have to have the
8285 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8289 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8290 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8291 if (shndx1
== -1 || shndx2
== -1)
8294 bed1
= get_elf_backend_data (bfd1
);
8295 bed2
= get_elf_backend_data (bfd2
);
8296 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8297 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8298 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8299 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8301 if (symcount1
== 0 || symcount2
== 0)
8304 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8306 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8310 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8313 /* Sort symbols by binding and section. Global definitions are at
8315 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8316 elf_sort_elf_symbol
);
8317 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8318 elf_sort_elf_symbol
);
8320 /* Count definitions in the section. */
8322 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8323 isym
< isymend
; isym
++)
8325 if (isym
->st_shndx
== (unsigned int) shndx1
)
8332 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8337 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8338 isym
< isymend
; isym
++)
8340 if (isym
->st_shndx
== (unsigned int) shndx2
)
8347 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8351 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8354 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8355 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8357 if (symtable1
== NULL
|| symtable2
== NULL
)
8361 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8362 isym
< isymend
; isym
++)
8365 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8372 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8373 isym
< isymend
; isym
++)
8376 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8382 /* Sort symbol by name. */
8383 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8384 elf_sym_name_compare
);
8385 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8386 elf_sym_name_compare
);
8388 for (i
= 0; i
< count1
; i
++)
8389 /* Two symbols must have the same binding, type and name. */
8390 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8391 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8392 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)