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 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1815 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1816 elf_onesymtab (abfd
) = shindex
;
1817 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1818 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1819 abfd
->flags
|= HAS_SYMS
;
1821 /* Sometimes a shared object will map in the symbol table. If
1822 SHF_ALLOC is set, and this is a shared object, then we also
1823 treat this section as a BFD section. We can not base the
1824 decision purely on SHF_ALLOC, because that flag is sometimes
1825 set in a relocatable object file, which would confuse the
1827 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1828 && (abfd
->flags
& DYNAMIC
) != 0
1829 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1833 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1834 can't read symbols without that section loaded as well. It
1835 is most likely specified by the next section header. */
1836 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1838 unsigned int i
, num_sec
;
1840 num_sec
= elf_numsections (abfd
);
1841 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1843 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1844 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1845 && hdr2
->sh_link
== shindex
)
1849 for (i
= 1; i
< shindex
; i
++)
1851 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1852 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1853 && hdr2
->sh_link
== shindex
)
1857 return bfd_section_from_shdr (abfd
, i
);
1861 case SHT_DYNSYM
: /* A dynamic symbol table */
1862 if (elf_dynsymtab (abfd
) == shindex
)
1865 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1866 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1867 elf_dynsymtab (abfd
) = shindex
;
1868 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1869 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1870 abfd
->flags
|= HAS_SYMS
;
1872 /* Besides being a symbol table, we also treat this as a regular
1873 section, so that objcopy can handle it. */
1874 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1876 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1877 if (elf_symtab_shndx (abfd
) == shindex
)
1880 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1881 elf_symtab_shndx (abfd
) = shindex
;
1882 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1883 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1886 case SHT_STRTAB
: /* A string table */
1887 if (hdr
->bfd_section
!= NULL
)
1889 if (ehdr
->e_shstrndx
== shindex
)
1891 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1892 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1895 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1898 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1899 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1902 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1905 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1906 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1907 elf_elfsections (abfd
)[shindex
] = hdr
;
1908 /* We also treat this as a regular section, so that objcopy
1910 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1914 /* If the string table isn't one of the above, then treat it as a
1915 regular section. We need to scan all the headers to be sure,
1916 just in case this strtab section appeared before the above. */
1917 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1919 unsigned int i
, num_sec
;
1921 num_sec
= elf_numsections (abfd
);
1922 for (i
= 1; i
< num_sec
; i
++)
1924 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1925 if (hdr2
->sh_link
== shindex
)
1927 /* Prevent endless recursion on broken objects. */
1930 if (! bfd_section_from_shdr (abfd
, i
))
1932 if (elf_onesymtab (abfd
) == i
)
1934 if (elf_dynsymtab (abfd
) == i
)
1935 goto dynsymtab_strtab
;
1939 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1943 /* *These* do a lot of work -- but build no sections! */
1945 asection
*target_sect
;
1946 Elf_Internal_Shdr
*hdr2
;
1947 unsigned int num_sec
= elf_numsections (abfd
);
1949 /* Check for a bogus link to avoid crashing. */
1950 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1951 || hdr
->sh_link
>= num_sec
)
1953 ((*_bfd_error_handler
)
1954 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1955 abfd
, hdr
->sh_link
, name
, shindex
));
1956 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1960 /* For some incomprehensible reason Oracle distributes
1961 libraries for Solaris in which some of the objects have
1962 bogus sh_link fields. It would be nice if we could just
1963 reject them, but, unfortunately, some people need to use
1964 them. We scan through the section headers; if we find only
1965 one suitable symbol table, we clobber the sh_link to point
1966 to it. I hope this doesn't break anything. */
1967 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1968 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1974 for (scan
= 1; scan
< num_sec
; scan
++)
1976 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1977 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1988 hdr
->sh_link
= found
;
1991 /* Get the symbol table. */
1992 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1993 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
1994 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1997 /* If this reloc section does not use the main symbol table we
1998 don't treat it as a reloc section. BFD can't adequately
1999 represent such a section, so at least for now, we don't
2000 try. We just present it as a normal section. We also
2001 can't use it as a reloc section if it points to the null
2003 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
2004 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
2007 /* Prevent endless recursion on broken objects. */
2008 if (elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_REL
2009 || elf_elfsections (abfd
)[hdr
->sh_info
]->sh_type
== SHT_RELA
)
2011 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
2013 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
2014 if (target_sect
== NULL
)
2017 if ((target_sect
->flags
& SEC_RELOC
) == 0
2018 || target_sect
->reloc_count
== 0)
2019 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
2023 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
2024 amt
= sizeof (*hdr2
);
2025 hdr2
= bfd_alloc (abfd
, amt
);
2026 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
2029 elf_elfsections (abfd
)[shindex
] = hdr2
;
2030 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
2031 target_sect
->flags
|= SEC_RELOC
;
2032 target_sect
->relocation
= NULL
;
2033 target_sect
->rel_filepos
= hdr
->sh_offset
;
2034 /* In the section to which the relocations apply, mark whether
2035 its relocations are of the REL or RELA variety. */
2036 if (hdr
->sh_size
!= 0)
2037 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2038 abfd
->flags
|= HAS_RELOC
;
2043 case SHT_GNU_verdef
:
2044 elf_dynverdef (abfd
) = shindex
;
2045 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2046 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2049 case SHT_GNU_versym
:
2050 elf_dynversym (abfd
) = shindex
;
2051 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2052 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2055 case SHT_GNU_verneed
:
2056 elf_dynverref (abfd
) = shindex
;
2057 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2058 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2065 /* We need a BFD section for objcopy and relocatable linking,
2066 and it's handy to have the signature available as the section
2068 name
= group_signature (abfd
, hdr
);
2071 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2073 if (hdr
->contents
!= NULL
)
2075 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2076 unsigned int n_elt
= hdr
->sh_size
/ 4;
2079 if (idx
->flags
& GRP_COMDAT
)
2080 hdr
->bfd_section
->flags
2081 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2083 /* We try to keep the same section order as it comes in. */
2085 while (--n_elt
!= 0)
2086 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2087 && elf_next_in_group (s
) != NULL
)
2089 elf_next_in_group (hdr
->bfd_section
) = s
;
2096 /* Check for any processor-specific section types. */
2097 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2104 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2105 Return SEC for sections that have no elf section, and NULL on error. */
2108 bfd_section_from_r_symndx (bfd
*abfd
,
2109 struct sym_sec_cache
*cache
,
2111 unsigned long r_symndx
)
2113 Elf_Internal_Shdr
*symtab_hdr
;
2114 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2115 Elf_External_Sym_Shndx eshndx
;
2116 Elf_Internal_Sym isym
;
2117 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2119 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2120 return cache
->sec
[ent
];
2122 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2123 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2124 &isym
, esym
, &eshndx
) == NULL
)
2127 if (cache
->abfd
!= abfd
)
2129 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2132 cache
->indx
[ent
] = r_symndx
;
2133 cache
->sec
[ent
] = sec
;
2134 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2135 || isym
.st_shndx
> SHN_HIRESERVE
)
2138 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2140 cache
->sec
[ent
] = s
;
2142 return cache
->sec
[ent
];
2145 /* Given an ELF section number, retrieve the corresponding BFD
2149 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2151 if (index
>= elf_numsections (abfd
))
2153 return elf_elfsections (abfd
)[index
]->bfd_section
;
2156 static struct bfd_elf_special_section
const special_sections_b
[] =
2158 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2159 { NULL
, 0, 0, 0, 0 }
2162 static struct bfd_elf_special_section
const special_sections_c
[] =
2164 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2165 { NULL
, 0, 0, 0, 0 }
2168 static struct bfd_elf_special_section
const special_sections_d
[] =
2170 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2171 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2172 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2173 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2174 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2175 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2176 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2177 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2178 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2179 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2180 { NULL
, 0, 0, 0, 0 }
2183 static struct bfd_elf_special_section
const special_sections_f
[] =
2185 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2186 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2187 { NULL
, 0, 0, 0, 0 }
2190 static struct bfd_elf_special_section
const special_sections_g
[] =
2192 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2193 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2194 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2195 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2196 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2197 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2198 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2199 { NULL
, 0, 0, 0, 0 }
2202 static struct bfd_elf_special_section
const special_sections_h
[] =
2204 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2205 { NULL
, 0, 0, 0, 0 }
2208 static struct bfd_elf_special_section
const special_sections_i
[] =
2210 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2211 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2212 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2213 { NULL
, 0, 0, 0, 0 }
2216 static struct bfd_elf_special_section
const special_sections_l
[] =
2218 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2219 { NULL
, 0, 0, 0, 0 }
2222 static struct bfd_elf_special_section
const special_sections_n
[] =
2224 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2225 { ".note", 5, -1, SHT_NOTE
, 0 },
2226 { NULL
, 0, 0, 0, 0 }
2229 static struct bfd_elf_special_section
const special_sections_p
[] =
2231 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2232 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2233 { NULL
, 0, 0, 0, 0 }
2236 static struct bfd_elf_special_section
const special_sections_r
[] =
2238 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2239 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2240 { ".rela", 5, -1, SHT_RELA
, 0 },
2241 { ".rel", 4, -1, SHT_REL
, 0 },
2242 { NULL
, 0, 0, 0, 0 }
2245 static struct bfd_elf_special_section
const special_sections_s
[] =
2247 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2248 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2249 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2250 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2251 { NULL
, 0, 0, 0, 0 }
2254 static struct bfd_elf_special_section
const special_sections_t
[] =
2256 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2257 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2258 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2259 { NULL
, 0, 0, 0, 0 }
2262 static struct bfd_elf_special_section
const *special_sections
[27] =
2265 special_sections_b
, /* 'b' */
2266 special_sections_c
, /* 'b' */
2267 special_sections_d
, /* 'd' */
2269 special_sections_f
, /* 'f' */
2270 special_sections_g
, /* 'g' */
2271 special_sections_h
, /* 'h' */
2272 special_sections_i
, /* 'i' */
2275 special_sections_l
, /* 'l' */
2277 special_sections_n
, /* 'n' */
2279 special_sections_p
, /* 'p' */
2281 special_sections_r
, /* 'r' */
2282 special_sections_s
, /* 's' */
2283 special_sections_t
, /* 't' */
2293 static const struct bfd_elf_special_section
*
2294 get_special_section (const char *name
,
2295 const struct bfd_elf_special_section
**special_sections_p
,
2300 const struct bfd_elf_special_section
*special_sections
;
2302 if (name
[0] == '.')
2305 if (i
< 0 || i
> 25)
2311 special_sections
= special_sections_p
[i
];
2313 if (!special_sections
)
2314 return special_sections
;
2318 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2321 int prefix_len
= special_sections
[i
].prefix_length
;
2323 if (len
< prefix_len
)
2325 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2328 suffix_len
= special_sections
[i
].suffix_length
;
2329 if (suffix_len
<= 0)
2331 if (name
[prefix_len
] != 0)
2333 if (suffix_len
== 0)
2335 if (name
[prefix_len
] != '.'
2336 && (suffix_len
== -2
2337 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2343 if (len
< prefix_len
+ suffix_len
)
2345 if (memcmp (name
+ len
- suffix_len
,
2346 special_sections
[i
].prefix
+ prefix_len
,
2350 return &special_sections
[i
];
2356 const struct bfd_elf_special_section
*
2357 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2359 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2360 const struct bfd_elf_special_section
*ssect
= NULL
;
2362 /* See if this is one of the special sections. */
2365 unsigned int rela
= bed
->default_use_rela_p
;
2367 if (bed
->special_sections
)
2368 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2371 ssect
= get_special_section (name
, special_sections
, rela
);
2378 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2380 struct bfd_elf_section_data
*sdata
;
2381 const struct bfd_elf_special_section
*ssect
;
2383 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2386 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2389 sec
->used_by_bfd
= sdata
;
2392 /* When we read a file, we don't need section type and flags unless
2393 it is a linker created section. They will be overridden in
2394 _bfd_elf_make_section_from_shdr anyway. */
2395 if (abfd
->direction
!= read_direction
2396 || (sec
->flags
& SEC_LINKER_CREATED
) != 0)
2398 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2401 elf_section_type (sec
) = ssect
->type
;
2402 elf_section_flags (sec
) = ssect
->attr
;
2406 /* Indicate whether or not this section should use RELA relocations. */
2407 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2412 /* Create a new bfd section from an ELF program header.
2414 Since program segments have no names, we generate a synthetic name
2415 of the form segment<NUM>, where NUM is generally the index in the
2416 program header table. For segments that are split (see below) we
2417 generate the names segment<NUM>a and segment<NUM>b.
2419 Note that some program segments may have a file size that is different than
2420 (less than) the memory size. All this means is that at execution the
2421 system must allocate the amount of memory specified by the memory size,
2422 but only initialize it with the first "file size" bytes read from the
2423 file. This would occur for example, with program segments consisting
2424 of combined data+bss.
2426 To handle the above situation, this routine generates TWO bfd sections
2427 for the single program segment. The first has the length specified by
2428 the file size of the segment, and the second has the length specified
2429 by the difference between the two sizes. In effect, the segment is split
2430 into it's initialized and uninitialized parts.
2435 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2436 Elf_Internal_Phdr
*hdr
,
2438 const char *typename
)
2446 split
= ((hdr
->p_memsz
> 0)
2447 && (hdr
->p_filesz
> 0)
2448 && (hdr
->p_memsz
> hdr
->p_filesz
));
2449 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2450 len
= strlen (namebuf
) + 1;
2451 name
= bfd_alloc (abfd
, len
);
2454 memcpy (name
, namebuf
, len
);
2455 newsect
= bfd_make_section (abfd
, name
);
2456 if (newsect
== NULL
)
2458 newsect
->vma
= hdr
->p_vaddr
;
2459 newsect
->lma
= hdr
->p_paddr
;
2460 newsect
->size
= hdr
->p_filesz
;
2461 newsect
->filepos
= hdr
->p_offset
;
2462 newsect
->flags
|= SEC_HAS_CONTENTS
;
2463 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2464 if (hdr
->p_type
== PT_LOAD
)
2466 newsect
->flags
|= SEC_ALLOC
;
2467 newsect
->flags
|= SEC_LOAD
;
2468 if (hdr
->p_flags
& PF_X
)
2470 /* FIXME: all we known is that it has execute PERMISSION,
2472 newsect
->flags
|= SEC_CODE
;
2475 if (!(hdr
->p_flags
& PF_W
))
2477 newsect
->flags
|= SEC_READONLY
;
2482 sprintf (namebuf
, "%s%db", typename
, index
);
2483 len
= strlen (namebuf
) + 1;
2484 name
= bfd_alloc (abfd
, len
);
2487 memcpy (name
, namebuf
, len
);
2488 newsect
= bfd_make_section (abfd
, name
);
2489 if (newsect
== NULL
)
2491 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2492 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2493 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2494 if (hdr
->p_type
== PT_LOAD
)
2496 newsect
->flags
|= SEC_ALLOC
;
2497 if (hdr
->p_flags
& PF_X
)
2498 newsect
->flags
|= SEC_CODE
;
2500 if (!(hdr
->p_flags
& PF_W
))
2501 newsect
->flags
|= SEC_READONLY
;
2508 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2510 const struct elf_backend_data
*bed
;
2512 switch (hdr
->p_type
)
2515 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2518 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2521 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2524 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2527 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2529 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2534 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2537 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2539 case PT_GNU_EH_FRAME
:
2540 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2544 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2547 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2550 /* Check for any processor-specific program segment types. */
2551 bed
= get_elf_backend_data (abfd
);
2552 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2556 /* Initialize REL_HDR, the section-header for new section, containing
2557 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2558 relocations; otherwise, we use REL relocations. */
2561 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2562 Elf_Internal_Shdr
*rel_hdr
,
2564 bfd_boolean use_rela_p
)
2567 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2568 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2570 name
= bfd_alloc (abfd
, amt
);
2573 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2575 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2577 if (rel_hdr
->sh_name
== (unsigned int) -1)
2579 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2580 rel_hdr
->sh_entsize
= (use_rela_p
2581 ? bed
->s
->sizeof_rela
2582 : bed
->s
->sizeof_rel
);
2583 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2584 rel_hdr
->sh_flags
= 0;
2585 rel_hdr
->sh_addr
= 0;
2586 rel_hdr
->sh_size
= 0;
2587 rel_hdr
->sh_offset
= 0;
2592 /* Set up an ELF internal section header for a section. */
2595 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2597 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2598 bfd_boolean
*failedptr
= failedptrarg
;
2599 Elf_Internal_Shdr
*this_hdr
;
2603 /* We already failed; just get out of the bfd_map_over_sections
2608 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2610 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2611 asect
->name
, FALSE
);
2612 if (this_hdr
->sh_name
== (unsigned int) -1)
2618 this_hdr
->sh_flags
= 0;
2620 if ((asect
->flags
& SEC_ALLOC
) != 0
2621 || asect
->user_set_vma
)
2622 this_hdr
->sh_addr
= asect
->vma
;
2624 this_hdr
->sh_addr
= 0;
2626 this_hdr
->sh_offset
= 0;
2627 this_hdr
->sh_size
= asect
->size
;
2628 this_hdr
->sh_link
= 0;
2629 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2630 /* The sh_entsize and sh_info fields may have been set already by
2631 copy_private_section_data. */
2633 this_hdr
->bfd_section
= asect
;
2634 this_hdr
->contents
= NULL
;
2636 /* If the section type is unspecified, we set it based on
2638 if (this_hdr
->sh_type
== SHT_NULL
)
2640 if ((asect
->flags
& SEC_GROUP
) != 0)
2642 /* We also need to mark SHF_GROUP here for relocatable
2644 struct bfd_link_order
*l
;
2647 for (l
= asect
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2648 if (l
->type
== bfd_indirect_link_order
2649 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2652 /* The name is not important. Anything will do. */
2653 elf_group_name (elt
->output_section
) = "G";
2654 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2656 elt
= elf_next_in_group (elt
);
2657 /* During a relocatable link, the lists are
2660 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2662 this_hdr
->sh_type
= SHT_GROUP
;
2664 else if ((asect
->flags
& SEC_ALLOC
) != 0
2665 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2666 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2667 this_hdr
->sh_type
= SHT_NOBITS
;
2669 this_hdr
->sh_type
= SHT_PROGBITS
;
2672 switch (this_hdr
->sh_type
)
2678 case SHT_INIT_ARRAY
:
2679 case SHT_FINI_ARRAY
:
2680 case SHT_PREINIT_ARRAY
:
2687 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2691 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2695 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2699 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2700 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2704 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2705 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2708 case SHT_GNU_versym
:
2709 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2712 case SHT_GNU_verdef
:
2713 this_hdr
->sh_entsize
= 0;
2714 /* objcopy or strip will copy over sh_info, but may not set
2715 cverdefs. The linker will set cverdefs, but sh_info will be
2717 if (this_hdr
->sh_info
== 0)
2718 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2720 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2721 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2724 case SHT_GNU_verneed
:
2725 this_hdr
->sh_entsize
= 0;
2726 /* objcopy or strip will copy over sh_info, but may not set
2727 cverrefs. The linker will set cverrefs, but sh_info will be
2729 if (this_hdr
->sh_info
== 0)
2730 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2732 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2733 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2737 this_hdr
->sh_entsize
= 4;
2741 if ((asect
->flags
& SEC_ALLOC
) != 0)
2742 this_hdr
->sh_flags
|= SHF_ALLOC
;
2743 if ((asect
->flags
& SEC_READONLY
) == 0)
2744 this_hdr
->sh_flags
|= SHF_WRITE
;
2745 if ((asect
->flags
& SEC_CODE
) != 0)
2746 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2747 if ((asect
->flags
& SEC_MERGE
) != 0)
2749 this_hdr
->sh_flags
|= SHF_MERGE
;
2750 this_hdr
->sh_entsize
= asect
->entsize
;
2751 if ((asect
->flags
& SEC_STRINGS
) != 0)
2752 this_hdr
->sh_flags
|= SHF_STRINGS
;
2754 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2755 this_hdr
->sh_flags
|= SHF_GROUP
;
2756 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2758 this_hdr
->sh_flags
|= SHF_TLS
;
2759 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2761 struct bfd_link_order
*o
;
2763 this_hdr
->sh_size
= 0;
2764 for (o
= asect
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
2765 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2766 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2767 if (this_hdr
->sh_size
)
2768 this_hdr
->sh_type
= SHT_NOBITS
;
2772 /* Check for processor-specific section types. */
2773 if (bed
->elf_backend_fake_sections
2774 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2777 /* If the section has relocs, set up a section header for the
2778 SHT_REL[A] section. If two relocation sections are required for
2779 this section, it is up to the processor-specific back-end to
2780 create the other. */
2781 if ((asect
->flags
& SEC_RELOC
) != 0
2782 && !_bfd_elf_init_reloc_shdr (abfd
,
2783 &elf_section_data (asect
)->rel_hdr
,
2789 /* Fill in the contents of a SHT_GROUP section. */
2792 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2794 bfd_boolean
*failedptr
= failedptrarg
;
2795 unsigned long symindx
;
2796 asection
*elt
, *first
;
2798 struct bfd_link_order
*l
;
2801 /* Ignore linker created group section. See elfNN_ia64_object_p in
2803 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2808 if (elf_group_id (sec
) != NULL
)
2809 symindx
= elf_group_id (sec
)->udata
.i
;
2813 /* If called from the assembler, swap_out_syms will have set up
2814 elf_section_syms; If called for "ld -r", use target_index. */
2815 if (elf_section_syms (abfd
) != NULL
)
2816 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2818 symindx
= sec
->target_index
;
2820 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2822 /* The contents won't be allocated for "ld -r" or objcopy. */
2824 if (sec
->contents
== NULL
)
2827 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2829 /* Arrange for the section to be written out. */
2830 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2831 if (sec
->contents
== NULL
)
2838 loc
= sec
->contents
+ sec
->size
;
2840 /* Get the pointer to the first section in the group that gas
2841 squirreled away here. objcopy arranges for this to be set to the
2842 start of the input section group. */
2843 first
= elt
= elf_next_in_group (sec
);
2845 /* First element is a flag word. Rest of section is elf section
2846 indices for all the sections of the group. Write them backwards
2847 just to keep the group in the same order as given in .section
2848 directives, not that it matters. */
2857 s
= s
->output_section
;
2860 idx
= elf_section_data (s
)->this_idx
;
2861 H_PUT_32 (abfd
, idx
, loc
);
2862 elt
= elf_next_in_group (elt
);
2867 /* If this is a relocatable link, then the above did nothing because
2868 SEC is the output section. Look through the input sections
2870 for (l
= sec
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2871 if (l
->type
== bfd_indirect_link_order
2872 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2877 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2878 elt
= elf_next_in_group (elt
);
2879 /* During a relocatable link, the lists are circular. */
2881 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2883 if ((loc
-= 4) != sec
->contents
)
2886 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2889 /* Assign all ELF section numbers. The dummy first section is handled here
2890 too. The link/info pointers for the standard section types are filled
2891 in here too, while we're at it. */
2894 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2896 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2898 unsigned int section_number
, secn
;
2899 Elf_Internal_Shdr
**i_shdrp
;
2901 struct bfd_elf_section_data
*d
;
2905 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2907 /* SHT_GROUP sections are in relocatable files only. */
2908 if (link_info
== NULL
|| link_info
->relocatable
)
2910 /* Put SHT_GROUP sections first. */
2911 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2913 d
= elf_section_data (sec
);
2915 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2917 if (sec
->flags
& SEC_LINKER_CREATED
)
2919 /* Remove the linker created SHT_GROUP sections. */
2920 bfd_section_list_remove (abfd
, sec
);
2921 abfd
->section_count
--;
2925 if (section_number
== SHN_LORESERVE
)
2926 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2927 d
->this_idx
= section_number
++;
2933 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2935 d
= elf_section_data (sec
);
2937 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2939 if (section_number
== SHN_LORESERVE
)
2940 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2941 d
->this_idx
= section_number
++;
2943 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2944 if ((sec
->flags
& SEC_RELOC
) == 0)
2948 if (section_number
== SHN_LORESERVE
)
2949 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2950 d
->rel_idx
= section_number
++;
2951 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2956 if (section_number
== SHN_LORESERVE
)
2957 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2958 d
->rel_idx2
= section_number
++;
2959 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2965 if (section_number
== SHN_LORESERVE
)
2966 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2967 t
->shstrtab_section
= section_number
++;
2968 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2969 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2971 if (bfd_get_symcount (abfd
) > 0)
2973 if (section_number
== SHN_LORESERVE
)
2974 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2975 t
->symtab_section
= section_number
++;
2976 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2977 if (section_number
> SHN_LORESERVE
- 2)
2979 if (section_number
== SHN_LORESERVE
)
2980 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2981 t
->symtab_shndx_section
= section_number
++;
2982 t
->symtab_shndx_hdr
.sh_name
2983 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2984 ".symtab_shndx", FALSE
);
2985 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2988 if (section_number
== SHN_LORESERVE
)
2989 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2990 t
->strtab_section
= section_number
++;
2991 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2994 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2995 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2997 elf_numsections (abfd
) = section_number
;
2998 elf_elfheader (abfd
)->e_shnum
= section_number
;
2999 if (section_number
> SHN_LORESERVE
)
3000 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
3002 /* Set up the list of section header pointers, in agreement with the
3004 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
3005 i_shdrp
= bfd_zalloc (abfd
, amt
);
3006 if (i_shdrp
== NULL
)
3009 amt
= sizeof (Elf_Internal_Shdr
);
3010 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
3011 if (i_shdrp
[0] == NULL
)
3013 bfd_release (abfd
, i_shdrp
);
3017 elf_elfsections (abfd
) = i_shdrp
;
3019 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
3020 if (bfd_get_symcount (abfd
) > 0)
3022 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
3023 if (elf_numsections (abfd
) > SHN_LORESERVE
)
3025 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
3026 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
3028 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
3029 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
3032 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
3034 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
3038 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
3039 if (d
->rel_idx
!= 0)
3040 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
3041 if (d
->rel_idx2
!= 0)
3042 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
3044 /* Fill in the sh_link and sh_info fields while we're at it. */
3046 /* sh_link of a reloc section is the section index of the symbol
3047 table. sh_info is the section index of the section to which
3048 the relocation entries apply. */
3049 if (d
->rel_idx
!= 0)
3051 d
->rel_hdr
.sh_link
= t
->symtab_section
;
3052 d
->rel_hdr
.sh_info
= d
->this_idx
;
3054 if (d
->rel_idx2
!= 0)
3056 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
3057 d
->rel_hdr2
->sh_info
= d
->this_idx
;
3060 /* We need to set up sh_link for SHF_LINK_ORDER. */
3061 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
3063 s
= elf_linked_to_section (sec
);
3065 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3068 struct bfd_link_order
*p
;
3070 /* Find out what the corresponding section in output
3072 for (p
= sec
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
3074 s
= p
->u
.indirect
.section
;
3075 if (p
->type
== bfd_indirect_link_order
3076 && (bfd_get_flavour (s
->owner
)
3077 == bfd_target_elf_flavour
))
3079 Elf_Internal_Shdr
** const elf_shdrp
3080 = elf_elfsections (s
->owner
);
3082 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
3083 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
3085 The Intel C compiler generates SHT_IA_64_UNWIND with
3086 SHF_LINK_ORDER. But it doesn't set the sh_link or
3087 sh_info fields. Hence we could get the situation
3088 where elfsec is 0. */
3091 const struct elf_backend_data
*bed
3092 = get_elf_backend_data (abfd
);
3093 if (bed
->link_order_error_handler
)
3094 bed
->link_order_error_handler
3095 (_("%B: warning: sh_link not set for section `%A'"),
3100 s
= elf_shdrp
[elfsec
]->bfd_section
;
3101 if (elf_discarded_section (s
))
3104 (*_bfd_error_handler
)
3105 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3106 abfd
, d
->this_hdr
.bfd_section
,
3108 /* Point to the kept section if it has
3109 the same size as the discarded
3111 kept
= _bfd_elf_check_kept_section (s
);
3114 bfd_set_error (bfd_error_bad_value
);
3119 s
= s
->output_section
;
3120 BFD_ASSERT (s
!= NULL
);
3121 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3129 switch (d
->this_hdr
.sh_type
)
3133 /* A reloc section which we are treating as a normal BFD
3134 section. sh_link is the section index of the symbol
3135 table. sh_info is the section index of the section to
3136 which the relocation entries apply. We assume that an
3137 allocated reloc section uses the dynamic symbol table.
3138 FIXME: How can we be sure? */
3139 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3141 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3143 /* We look up the section the relocs apply to by name. */
3145 if (d
->this_hdr
.sh_type
== SHT_REL
)
3149 s
= bfd_get_section_by_name (abfd
, name
);
3151 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3155 /* We assume that a section named .stab*str is a stabs
3156 string section. We look for a section with the same name
3157 but without the trailing ``str'', and set its sh_link
3158 field to point to this section. */
3159 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3160 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3165 len
= strlen (sec
->name
);
3166 alc
= bfd_malloc (len
- 2);
3169 memcpy (alc
, sec
->name
, len
- 3);
3170 alc
[len
- 3] = '\0';
3171 s
= bfd_get_section_by_name (abfd
, alc
);
3175 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3177 /* This is a .stab section. */
3178 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3179 elf_section_data (s
)->this_hdr
.sh_entsize
3180 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3187 case SHT_GNU_verneed
:
3188 case SHT_GNU_verdef
:
3189 /* sh_link is the section header index of the string table
3190 used for the dynamic entries, or the symbol table, or the
3192 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3194 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3197 case SHT_GNU_LIBLIST
:
3198 /* sh_link is the section header index of the prelink library
3200 used for the dynamic entries, or the symbol table, or the
3202 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3203 ? ".dynstr" : ".gnu.libstr");
3205 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3209 case SHT_GNU_versym
:
3210 /* sh_link is the section header index of the symbol table
3211 this hash table or version table is for. */
3212 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3214 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3218 d
->this_hdr
.sh_link
= t
->symtab_section
;
3222 for (secn
= 1; secn
< section_number
; ++secn
)
3223 if (i_shdrp
[secn
] == NULL
)
3224 i_shdrp
[secn
] = i_shdrp
[0];
3226 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3227 i_shdrp
[secn
]->sh_name
);
3231 /* Map symbol from it's internal number to the external number, moving
3232 all local symbols to be at the head of the list. */
3235 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3237 /* If the backend has a special mapping, use it. */
3238 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3239 if (bed
->elf_backend_sym_is_global
)
3240 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3242 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3243 || bfd_is_und_section (bfd_get_section (sym
))
3244 || bfd_is_com_section (bfd_get_section (sym
)));
3248 elf_map_symbols (bfd
*abfd
)
3250 unsigned int symcount
= bfd_get_symcount (abfd
);
3251 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3252 asymbol
**sect_syms
;
3253 unsigned int num_locals
= 0;
3254 unsigned int num_globals
= 0;
3255 unsigned int num_locals2
= 0;
3256 unsigned int num_globals2
= 0;
3264 fprintf (stderr
, "elf_map_symbols\n");
3268 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3270 if (max_index
< asect
->index
)
3271 max_index
= asect
->index
;
3275 amt
= max_index
* sizeof (asymbol
*);
3276 sect_syms
= bfd_zalloc (abfd
, amt
);
3277 if (sect_syms
== NULL
)
3279 elf_section_syms (abfd
) = sect_syms
;
3280 elf_num_section_syms (abfd
) = max_index
;
3282 /* Init sect_syms entries for any section symbols we have already
3283 decided to output. */
3284 for (idx
= 0; idx
< symcount
; idx
++)
3286 asymbol
*sym
= syms
[idx
];
3288 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3295 if (sec
->owner
!= NULL
)
3297 if (sec
->owner
!= abfd
)
3299 if (sec
->output_offset
!= 0)
3302 sec
= sec
->output_section
;
3304 /* Empty sections in the input files may have had a
3305 section symbol created for them. (See the comment
3306 near the end of _bfd_generic_link_output_symbols in
3307 linker.c). If the linker script discards such
3308 sections then we will reach this point. Since we know
3309 that we cannot avoid this case, we detect it and skip
3310 the abort and the assignment to the sect_syms array.
3311 To reproduce this particular case try running the
3312 linker testsuite test ld-scripts/weak.exp for an ELF
3313 port that uses the generic linker. */
3314 if (sec
->owner
== NULL
)
3317 BFD_ASSERT (sec
->owner
== abfd
);
3319 sect_syms
[sec
->index
] = syms
[idx
];
3324 /* Classify all of the symbols. */
3325 for (idx
= 0; idx
< symcount
; idx
++)
3327 if (!sym_is_global (abfd
, syms
[idx
]))
3333 /* We will be adding a section symbol for each BFD section. Most normal
3334 sections will already have a section symbol in outsymbols, but
3335 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3336 at least in that case. */
3337 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3339 if (sect_syms
[asect
->index
] == NULL
)
3341 if (!sym_is_global (abfd
, asect
->symbol
))
3348 /* Now sort the symbols so the local symbols are first. */
3349 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3350 new_syms
= bfd_alloc (abfd
, amt
);
3352 if (new_syms
== NULL
)
3355 for (idx
= 0; idx
< symcount
; idx
++)
3357 asymbol
*sym
= syms
[idx
];
3360 if (!sym_is_global (abfd
, sym
))
3363 i
= num_locals
+ num_globals2
++;
3365 sym
->udata
.i
= i
+ 1;
3367 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3369 if (sect_syms
[asect
->index
] == NULL
)
3371 asymbol
*sym
= asect
->symbol
;
3374 sect_syms
[asect
->index
] = sym
;
3375 if (!sym_is_global (abfd
, sym
))
3378 i
= num_locals
+ num_globals2
++;
3380 sym
->udata
.i
= i
+ 1;
3384 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3386 elf_num_locals (abfd
) = num_locals
;
3387 elf_num_globals (abfd
) = num_globals
;
3391 /* Align to the maximum file alignment that could be required for any
3392 ELF data structure. */
3394 static inline file_ptr
3395 align_file_position (file_ptr off
, int align
)
3397 return (off
+ align
- 1) & ~(align
- 1);
3400 /* Assign a file position to a section, optionally aligning to the
3401 required section alignment. */
3404 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3412 al
= i_shdrp
->sh_addralign
;
3414 offset
= BFD_ALIGN (offset
, al
);
3416 i_shdrp
->sh_offset
= offset
;
3417 if (i_shdrp
->bfd_section
!= NULL
)
3418 i_shdrp
->bfd_section
->filepos
= offset
;
3419 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3420 offset
+= i_shdrp
->sh_size
;
3424 /* Compute the file positions we are going to put the sections at, and
3425 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3426 is not NULL, this is being called by the ELF backend linker. */
3429 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3430 struct bfd_link_info
*link_info
)
3432 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3434 struct bfd_strtab_hash
*strtab
= NULL
;
3435 Elf_Internal_Shdr
*shstrtab_hdr
;
3437 if (abfd
->output_has_begun
)
3440 /* Do any elf backend specific processing first. */
3441 if (bed
->elf_backend_begin_write_processing
)
3442 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3444 if (! prep_headers (abfd
))
3447 /* Post process the headers if necessary. */
3448 if (bed
->elf_backend_post_process_headers
)
3449 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3452 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3456 if (!assign_section_numbers (abfd
, link_info
))
3459 /* The backend linker builds symbol table information itself. */
3460 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3462 /* Non-zero if doing a relocatable link. */
3463 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3465 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3469 if (link_info
== NULL
)
3471 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3476 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3477 /* sh_name was set in prep_headers. */
3478 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3479 shstrtab_hdr
->sh_flags
= 0;
3480 shstrtab_hdr
->sh_addr
= 0;
3481 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3482 shstrtab_hdr
->sh_entsize
= 0;
3483 shstrtab_hdr
->sh_link
= 0;
3484 shstrtab_hdr
->sh_info
= 0;
3485 /* sh_offset is set in assign_file_positions_except_relocs. */
3486 shstrtab_hdr
->sh_addralign
= 1;
3488 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3491 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3494 Elf_Internal_Shdr
*hdr
;
3496 off
= elf_tdata (abfd
)->next_file_pos
;
3498 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3499 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3501 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3502 if (hdr
->sh_size
!= 0)
3503 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3505 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3506 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3508 elf_tdata (abfd
)->next_file_pos
= off
;
3510 /* Now that we know where the .strtab section goes, write it
3512 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3513 || ! _bfd_stringtab_emit (abfd
, strtab
))
3515 _bfd_stringtab_free (strtab
);
3518 abfd
->output_has_begun
= TRUE
;
3523 /* Create a mapping from a set of sections to a program segment. */
3525 static struct elf_segment_map
*
3526 make_mapping (bfd
*abfd
,
3527 asection
**sections
,
3532 struct elf_segment_map
*m
;
3537 amt
= sizeof (struct elf_segment_map
);
3538 amt
+= (to
- from
- 1) * sizeof (asection
*);
3539 m
= bfd_zalloc (abfd
, amt
);
3543 m
->p_type
= PT_LOAD
;
3544 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3545 m
->sections
[i
- from
] = *hdrpp
;
3546 m
->count
= to
- from
;
3548 if (from
== 0 && phdr
)
3550 /* Include the headers in the first PT_LOAD segment. */
3551 m
->includes_filehdr
= 1;
3552 m
->includes_phdrs
= 1;
3558 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3561 struct elf_segment_map
*
3562 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3564 struct elf_segment_map
*m
;
3566 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3570 m
->p_type
= PT_DYNAMIC
;
3572 m
->sections
[0] = dynsec
;
3577 /* Set up a mapping from BFD sections to program segments. */
3580 map_sections_to_segments (bfd
*abfd
)
3582 asection
**sections
= NULL
;
3586 struct elf_segment_map
*mfirst
;
3587 struct elf_segment_map
**pm
;
3588 struct elf_segment_map
*m
;
3591 unsigned int phdr_index
;
3592 bfd_vma maxpagesize
;
3594 bfd_boolean phdr_in_segment
= TRUE
;
3595 bfd_boolean writable
;
3597 asection
*first_tls
= NULL
;
3598 asection
*dynsec
, *eh_frame_hdr
;
3601 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3604 if (bfd_count_sections (abfd
) == 0)
3607 /* Select the allocated sections, and sort them. */
3609 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3610 sections
= bfd_malloc (amt
);
3611 if (sections
== NULL
)
3615 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3617 if ((s
->flags
& SEC_ALLOC
) != 0)
3623 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3626 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3628 /* Build the mapping. */
3633 /* If we have a .interp section, then create a PT_PHDR segment for
3634 the program headers and a PT_INTERP segment for the .interp
3636 s
= bfd_get_section_by_name (abfd
, ".interp");
3637 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3639 amt
= sizeof (struct elf_segment_map
);
3640 m
= bfd_zalloc (abfd
, amt
);
3644 m
->p_type
= PT_PHDR
;
3645 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3646 m
->p_flags
= PF_R
| PF_X
;
3647 m
->p_flags_valid
= 1;
3648 m
->includes_phdrs
= 1;
3653 amt
= sizeof (struct elf_segment_map
);
3654 m
= bfd_zalloc (abfd
, amt
);
3658 m
->p_type
= PT_INTERP
;
3666 /* Look through the sections. We put sections in the same program
3667 segment when the start of the second section can be placed within
3668 a few bytes of the end of the first section. */
3672 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3674 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3676 && (dynsec
->flags
& SEC_LOAD
) == 0)
3679 /* Deal with -Ttext or something similar such that the first section
3680 is not adjacent to the program headers. This is an
3681 approximation, since at this point we don't know exactly how many
3682 program headers we will need. */
3685 bfd_size_type phdr_size
;
3687 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3689 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3690 if ((abfd
->flags
& D_PAGED
) == 0
3691 || sections
[0]->lma
< phdr_size
3692 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3693 phdr_in_segment
= FALSE
;
3696 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3699 bfd_boolean new_segment
;
3703 /* See if this section and the last one will fit in the same
3706 if (last_hdr
== NULL
)
3708 /* If we don't have a segment yet, then we don't need a new
3709 one (we build the last one after this loop). */
3710 new_segment
= FALSE
;
3712 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3714 /* If this section has a different relation between the
3715 virtual address and the load address, then we need a new
3719 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3720 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3722 /* If putting this section in this segment would force us to
3723 skip a page in the segment, then we need a new segment. */
3726 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3727 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3729 /* We don't want to put a loadable section after a
3730 nonloadable section in the same segment.
3731 Consider .tbss sections as loadable for this purpose. */
3734 else if ((abfd
->flags
& D_PAGED
) == 0)
3736 /* If the file is not demand paged, which means that we
3737 don't require the sections to be correctly aligned in the
3738 file, then there is no other reason for a new segment. */
3739 new_segment
= FALSE
;
3742 && (hdr
->flags
& SEC_READONLY
) == 0
3743 && (((last_hdr
->lma
+ last_size
- 1)
3744 & ~(maxpagesize
- 1))
3745 != (hdr
->lma
& ~(maxpagesize
- 1))))
3747 /* We don't want to put a writable section in a read only
3748 segment, unless they are on the same page in memory
3749 anyhow. We already know that the last section does not
3750 bring us past the current section on the page, so the
3751 only case in which the new section is not on the same
3752 page as the previous section is when the previous section
3753 ends precisely on a page boundary. */
3758 /* Otherwise, we can use the same segment. */
3759 new_segment
= FALSE
;
3764 if ((hdr
->flags
& SEC_READONLY
) == 0)
3767 /* .tbss sections effectively have zero size. */
3768 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3769 last_size
= hdr
->size
;
3775 /* We need a new program segment. We must create a new program
3776 header holding all the sections from phdr_index until hdr. */
3778 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3785 if ((hdr
->flags
& SEC_READONLY
) == 0)
3791 /* .tbss sections effectively have zero size. */
3792 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3793 last_size
= hdr
->size
;
3797 phdr_in_segment
= FALSE
;
3800 /* Create a final PT_LOAD program segment. */
3801 if (last_hdr
!= NULL
)
3803 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3811 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3814 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3821 /* For each loadable .note section, add a PT_NOTE segment. We don't
3822 use bfd_get_section_by_name, because if we link together
3823 nonloadable .note sections and loadable .note sections, we will
3824 generate two .note sections in the output file. FIXME: Using
3825 names for section types is bogus anyhow. */
3826 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3828 if ((s
->flags
& SEC_LOAD
) != 0
3829 && strncmp (s
->name
, ".note", 5) == 0)
3831 amt
= sizeof (struct elf_segment_map
);
3832 m
= bfd_zalloc (abfd
, amt
);
3836 m
->p_type
= PT_NOTE
;
3843 if (s
->flags
& SEC_THREAD_LOCAL
)
3851 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3856 amt
= sizeof (struct elf_segment_map
);
3857 amt
+= (tls_count
- 1) * sizeof (asection
*);
3858 m
= bfd_zalloc (abfd
, amt
);
3863 m
->count
= tls_count
;
3864 /* Mandated PF_R. */
3866 m
->p_flags_valid
= 1;
3867 for (i
= 0; i
< tls_count
; ++i
)
3869 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3870 m
->sections
[i
] = first_tls
;
3871 first_tls
= first_tls
->next
;
3878 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3880 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3881 if (eh_frame_hdr
!= NULL
3882 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3884 amt
= sizeof (struct elf_segment_map
);
3885 m
= bfd_zalloc (abfd
, amt
);
3889 m
->p_type
= PT_GNU_EH_FRAME
;
3891 m
->sections
[0] = eh_frame_hdr
->output_section
;
3897 if (elf_tdata (abfd
)->stack_flags
)
3899 amt
= sizeof (struct elf_segment_map
);
3900 m
= bfd_zalloc (abfd
, amt
);
3904 m
->p_type
= PT_GNU_STACK
;
3905 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3906 m
->p_flags_valid
= 1;
3912 if (elf_tdata (abfd
)->relro
)
3914 amt
= sizeof (struct elf_segment_map
);
3915 m
= bfd_zalloc (abfd
, amt
);
3919 m
->p_type
= PT_GNU_RELRO
;
3921 m
->p_flags_valid
= 1;
3930 elf_tdata (abfd
)->segment_map
= mfirst
;
3934 if (sections
!= NULL
)
3939 /* Sort sections by address. */
3942 elf_sort_sections (const void *arg1
, const void *arg2
)
3944 const asection
*sec1
= *(const asection
**) arg1
;
3945 const asection
*sec2
= *(const asection
**) arg2
;
3946 bfd_size_type size1
, size2
;
3948 /* Sort by LMA first, since this is the address used to
3949 place the section into a segment. */
3950 if (sec1
->lma
< sec2
->lma
)
3952 else if (sec1
->lma
> sec2
->lma
)
3955 /* Then sort by VMA. Normally the LMA and the VMA will be
3956 the same, and this will do nothing. */
3957 if (sec1
->vma
< sec2
->vma
)
3959 else if (sec1
->vma
> sec2
->vma
)
3962 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3964 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3970 /* If the indicies are the same, do not return 0
3971 here, but continue to try the next comparison. */
3972 if (sec1
->target_index
- sec2
->target_index
!= 0)
3973 return sec1
->target_index
- sec2
->target_index
;
3978 else if (TOEND (sec2
))
3983 /* Sort by size, to put zero sized sections
3984 before others at the same address. */
3986 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3987 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3994 return sec1
->target_index
- sec2
->target_index
;
3997 /* Ian Lance Taylor writes:
3999 We shouldn't be using % with a negative signed number. That's just
4000 not good. We have to make sure either that the number is not
4001 negative, or that the number has an unsigned type. When the types
4002 are all the same size they wind up as unsigned. When file_ptr is a
4003 larger signed type, the arithmetic winds up as signed long long,
4006 What we're trying to say here is something like ``increase OFF by
4007 the least amount that will cause it to be equal to the VMA modulo
4009 /* In other words, something like:
4011 vma_offset = m->sections[0]->vma % bed->maxpagesize;
4012 off_offset = off % bed->maxpagesize;
4013 if (vma_offset < off_offset)
4014 adjustment = vma_offset + bed->maxpagesize - off_offset;
4016 adjustment = vma_offset - off_offset;
4018 which can can be collapsed into the expression below. */
4021 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
4023 return ((vma
- off
) % maxpagesize
);
4026 /* Assign file positions to the sections based on the mapping from
4027 sections to segments. This function also sets up some fields in
4028 the file header, and writes out the program headers. */
4031 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
4033 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4035 struct elf_segment_map
*m
;
4037 Elf_Internal_Phdr
*phdrs
;
4039 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4040 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4041 Elf_Internal_Phdr
*p
;
4044 if (elf_tdata (abfd
)->segment_map
== NULL
)
4046 if (! map_sections_to_segments (abfd
))
4051 /* The placement algorithm assumes that non allocated sections are
4052 not in PT_LOAD segments. We ensure this here by removing such
4053 sections from the segment map. */
4054 for (m
= elf_tdata (abfd
)->segment_map
;
4058 unsigned int new_count
;
4061 if (m
->p_type
!= PT_LOAD
)
4065 for (i
= 0; i
< m
->count
; i
++)
4067 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
4070 m
->sections
[new_count
] = m
->sections
[i
];
4076 if (new_count
!= m
->count
)
4077 m
->count
= new_count
;
4081 if (bed
->elf_backend_modify_segment_map
)
4083 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
4088 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4091 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4092 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4093 elf_elfheader (abfd
)->e_phnum
= count
;
4097 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4101 /* If we already counted the number of program segments, make sure
4102 that we allocated enough space. This happens when SIZEOF_HEADERS
4103 is used in a linker script. */
4104 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
4105 if (alloc
!= 0 && count
> alloc
)
4107 ((*_bfd_error_handler
)
4108 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4109 abfd
, alloc
, count
));
4110 bfd_set_error (bfd_error_bad_value
);
4117 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
4118 phdrs
= bfd_alloc (abfd
, amt
);
4122 off
= bed
->s
->sizeof_ehdr
;
4123 off
+= alloc
* bed
->s
->sizeof_phdr
;
4130 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4137 /* If elf_segment_map is not from map_sections_to_segments, the
4138 sections may not be correctly ordered. NOTE: sorting should
4139 not be done to the PT_NOTE section of a corefile, which may
4140 contain several pseudo-sections artificially created by bfd.
4141 Sorting these pseudo-sections breaks things badly. */
4143 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4144 && m
->p_type
== PT_NOTE
))
4145 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4148 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4149 number of sections with contents contributing to both p_filesz
4150 and p_memsz, followed by a number of sections with no contents
4151 that just contribute to p_memsz. In this loop, OFF tracks next
4152 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4153 an adjustment we use for segments that have no file contents
4154 but need zero filled memory allocation. */
4156 p
->p_type
= m
->p_type
;
4157 p
->p_flags
= m
->p_flags
;
4159 if (p
->p_type
== PT_LOAD
4162 bfd_size_type align
;
4164 unsigned int align_power
= 0;
4166 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4168 unsigned int secalign
;
4170 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4171 if (secalign
> align_power
)
4172 align_power
= secalign
;
4174 align
= (bfd_size_type
) 1 << align_power
;
4176 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> align
)
4177 align
= bed
->maxpagesize
;
4179 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4182 && !m
->includes_filehdr
4183 && !m
->includes_phdrs
4184 && (ufile_ptr
) off
>= align
)
4186 /* If the first section isn't loadable, the same holds for
4187 any other sections. Since the segment won't need file
4188 space, we can make p_offset overlap some prior segment.
4189 However, .tbss is special. If a segment starts with
4190 .tbss, we need to look at the next section to decide
4191 whether the segment has any loadable sections. */
4193 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4195 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4199 voff
= adjust
- align
;
4205 /* Make sure the .dynamic section is the first section in the
4206 PT_DYNAMIC segment. */
4207 else if (p
->p_type
== PT_DYNAMIC
4209 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4212 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4214 bfd_set_error (bfd_error_bad_value
);
4221 p
->p_vaddr
= m
->sections
[0]->vma
;
4223 if (m
->p_paddr_valid
)
4224 p
->p_paddr
= m
->p_paddr
;
4225 else if (m
->count
== 0)
4228 p
->p_paddr
= m
->sections
[0]->lma
;
4230 if (p
->p_type
== PT_LOAD
4231 && (abfd
->flags
& D_PAGED
) != 0)
4232 p
->p_align
= bed
->maxpagesize
;
4233 else if (m
->count
== 0)
4234 p
->p_align
= 1 << bed
->s
->log_file_align
;
4242 if (m
->includes_filehdr
)
4244 if (! m
->p_flags_valid
)
4247 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4248 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4251 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4253 if (p
->p_vaddr
< (bfd_vma
) off
)
4255 (*_bfd_error_handler
)
4256 (_("%B: Not enough room for program headers, try linking with -N"),
4258 bfd_set_error (bfd_error_bad_value
);
4263 if (! m
->p_paddr_valid
)
4266 if (p
->p_type
== PT_LOAD
)
4268 filehdr_vaddr
= p
->p_vaddr
;
4269 filehdr_paddr
= p
->p_paddr
;
4273 if (m
->includes_phdrs
)
4275 if (! m
->p_flags_valid
)
4278 if (m
->includes_filehdr
)
4280 if (p
->p_type
== PT_LOAD
)
4282 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4283 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4288 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4292 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4293 p
->p_vaddr
-= off
- p
->p_offset
;
4294 if (! m
->p_paddr_valid
)
4295 p
->p_paddr
-= off
- p
->p_offset
;
4298 if (p
->p_type
== PT_LOAD
)
4300 phdrs_vaddr
= p
->p_vaddr
;
4301 phdrs_paddr
= p
->p_paddr
;
4304 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4307 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4308 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4311 if (p
->p_type
== PT_LOAD
4312 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4314 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4315 p
->p_offset
= off
+ voff
;
4320 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4321 p
->p_filesz
+= adjust
;
4322 p
->p_memsz
+= adjust
;
4326 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4330 bfd_size_type align
;
4334 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4336 if (p
->p_type
== PT_LOAD
4337 || p
->p_type
== PT_TLS
)
4339 bfd_signed_vma adjust
;
4341 if ((flags
& SEC_LOAD
) != 0)
4343 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4346 (*_bfd_error_handler
)
4347 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4348 abfd
, sec
, (unsigned long) sec
->lma
);
4352 p
->p_filesz
+= adjust
;
4353 p
->p_memsz
+= adjust
;
4355 /* .tbss is special. It doesn't contribute to p_memsz of
4357 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4358 || p
->p_type
== PT_TLS
)
4360 /* The section VMA must equal the file position
4361 modulo the page size. */
4362 bfd_size_type page
= align
;
4363 if ((abfd
->flags
& D_PAGED
) != 0 && bed
->maxpagesize
> page
)
4364 page
= bed
->maxpagesize
;
4365 adjust
= vma_page_aligned_bias (sec
->vma
,
4366 p
->p_vaddr
+ p
->p_memsz
,
4368 p
->p_memsz
+= adjust
;
4372 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4374 /* The section at i == 0 is the one that actually contains
4380 p
->p_filesz
= sec
->size
;
4386 /* The rest are fake sections that shouldn't be written. */
4395 if (p
->p_type
== PT_LOAD
)
4398 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4399 1997, and the exact reason for it isn't clear. One
4400 plausible explanation is that it is to work around
4401 a problem we have with linker scripts using data
4402 statements in NOLOAD sections. I don't think it
4403 makes a great deal of sense to have such a section
4404 assigned to a PT_LOAD segment, but apparently
4405 people do this. The data statement results in a
4406 bfd_data_link_order being built, and these need
4407 section contents to write into. Eventually, we get
4408 to _bfd_elf_write_object_contents which writes any
4409 section with contents to the output. Make room
4410 here for the write, so that following segments are
4412 if ((flags
& SEC_LOAD
) != 0
4413 || (flags
& SEC_HAS_CONTENTS
) != 0)
4417 if ((flags
& SEC_LOAD
) != 0)
4419 p
->p_filesz
+= sec
->size
;
4420 p
->p_memsz
+= sec
->size
;
4422 /* PR ld/594: Sections in note segments which are not loaded
4423 contribute to the file size but not the in-memory size. */
4424 else if (p
->p_type
== PT_NOTE
4425 && (flags
& SEC_HAS_CONTENTS
) != 0)
4426 p
->p_filesz
+= sec
->size
;
4428 /* .tbss is special. It doesn't contribute to p_memsz of
4430 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4431 || p
->p_type
== PT_TLS
)
4432 p
->p_memsz
+= sec
->size
;
4434 if (p
->p_type
== PT_TLS
4436 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4438 struct bfd_link_order
*o
;
4439 bfd_vma tbss_size
= 0;
4441 for (o
= sec
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
4442 if (tbss_size
< o
->offset
+ o
->size
)
4443 tbss_size
= o
->offset
+ o
->size
;
4445 p
->p_memsz
+= tbss_size
;
4448 if (align
> p
->p_align
4449 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4453 if (! m
->p_flags_valid
)
4456 if ((flags
& SEC_CODE
) != 0)
4458 if ((flags
& SEC_READONLY
) == 0)
4464 /* Now that we have set the section file positions, we can set up
4465 the file positions for the non PT_LOAD segments. */
4466 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4470 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4472 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4473 /* If the section has not yet been assigned a file position,
4474 do so now. The ARM BPABI requires that .dynamic section
4475 not be marked SEC_ALLOC because it is not part of any
4476 PT_LOAD segment, so it will not be processed above. */
4477 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4480 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4483 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4485 off
= (_bfd_elf_assign_file_position_for_section
4486 (i_shdrpp
[i
], off
, TRUE
));
4487 p
->p_filesz
= m
->sections
[0]->size
;
4489 p
->p_offset
= m
->sections
[0]->filepos
;
4493 if (m
->includes_filehdr
)
4495 p
->p_vaddr
= filehdr_vaddr
;
4496 if (! m
->p_paddr_valid
)
4497 p
->p_paddr
= filehdr_paddr
;
4499 else if (m
->includes_phdrs
)
4501 p
->p_vaddr
= phdrs_vaddr
;
4502 if (! m
->p_paddr_valid
)
4503 p
->p_paddr
= phdrs_paddr
;
4505 else if (p
->p_type
== PT_GNU_RELRO
)
4507 Elf_Internal_Phdr
*lp
;
4509 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4511 if (lp
->p_type
== PT_LOAD
4512 && lp
->p_vaddr
<= link_info
->relro_end
4513 && lp
->p_vaddr
>= link_info
->relro_start
4514 && lp
->p_vaddr
+ lp
->p_filesz
4515 >= link_info
->relro_end
)
4519 if (lp
< phdrs
+ count
4520 && link_info
->relro_end
> lp
->p_vaddr
)
4522 p
->p_vaddr
= lp
->p_vaddr
;
4523 p
->p_paddr
= lp
->p_paddr
;
4524 p
->p_offset
= lp
->p_offset
;
4525 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4526 p
->p_memsz
= p
->p_filesz
;
4528 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4532 memset (p
, 0, sizeof *p
);
4533 p
->p_type
= PT_NULL
;
4539 /* Clear out any program headers we allocated but did not use. */
4540 for (; count
< alloc
; count
++, p
++)
4542 memset (p
, 0, sizeof *p
);
4543 p
->p_type
= PT_NULL
;
4546 elf_tdata (abfd
)->phdr
= phdrs
;
4548 elf_tdata (abfd
)->next_file_pos
= off
;
4550 /* Write out the program headers. */
4551 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4552 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4558 /* Get the size of the program header.
4560 If this is called by the linker before any of the section VMA's are set, it
4561 can't calculate the correct value for a strange memory layout. This only
4562 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4563 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4564 data segment (exclusive of .interp and .dynamic).
4566 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4567 will be two segments. */
4569 static bfd_size_type
4570 get_program_header_size (bfd
*abfd
)
4574 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4576 /* We can't return a different result each time we're called. */
4577 if (elf_tdata (abfd
)->program_header_size
!= 0)
4578 return elf_tdata (abfd
)->program_header_size
;
4580 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4582 struct elf_segment_map
*m
;
4585 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4587 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4588 return elf_tdata (abfd
)->program_header_size
;
4591 /* Assume we will need exactly two PT_LOAD segments: one for text
4592 and one for data. */
4595 s
= bfd_get_section_by_name (abfd
, ".interp");
4596 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4598 /* If we have a loadable interpreter section, we need a
4599 PT_INTERP segment. In this case, assume we also need a
4600 PT_PHDR segment, although that may not be true for all
4605 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4607 /* We need a PT_DYNAMIC segment. */
4611 if (elf_tdata (abfd
)->eh_frame_hdr
)
4613 /* We need a PT_GNU_EH_FRAME segment. */
4617 if (elf_tdata (abfd
)->stack_flags
)
4619 /* We need a PT_GNU_STACK segment. */
4623 if (elf_tdata (abfd
)->relro
)
4625 /* We need a PT_GNU_RELRO segment. */
4629 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4631 if ((s
->flags
& SEC_LOAD
) != 0
4632 && strncmp (s
->name
, ".note", 5) == 0)
4634 /* We need a PT_NOTE segment. */
4639 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4641 if (s
->flags
& SEC_THREAD_LOCAL
)
4643 /* We need a PT_TLS segment. */
4649 /* Let the backend count up any program headers it might need. */
4650 if (bed
->elf_backend_additional_program_headers
)
4654 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4660 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4661 return elf_tdata (abfd
)->program_header_size
;
4664 /* Work out the file positions of all the sections. This is called by
4665 _bfd_elf_compute_section_file_positions. All the section sizes and
4666 VMAs must be known before this is called.
4668 Reloc sections come in two flavours: Those processed specially as
4669 "side-channel" data attached to a section to which they apply, and
4670 those that bfd doesn't process as relocations. The latter sort are
4671 stored in a normal bfd section by bfd_section_from_shdr. We don't
4672 consider the former sort here, unless they form part of the loadable
4673 image. Reloc sections not assigned here will be handled later by
4674 assign_file_positions_for_relocs.
4676 We also don't set the positions of the .symtab and .strtab here. */
4679 assign_file_positions_except_relocs (bfd
*abfd
,
4680 struct bfd_link_info
*link_info
)
4682 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4683 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4684 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4685 unsigned int num_sec
= elf_numsections (abfd
);
4687 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4689 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4690 && bfd_get_format (abfd
) != bfd_core
)
4692 Elf_Internal_Shdr
**hdrpp
;
4695 /* Start after the ELF header. */
4696 off
= i_ehdrp
->e_ehsize
;
4698 /* We are not creating an executable, which means that we are
4699 not creating a program header, and that the actual order of
4700 the sections in the file is unimportant. */
4701 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4703 Elf_Internal_Shdr
*hdr
;
4706 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4707 && hdr
->bfd_section
== NULL
)
4708 || i
== tdata
->symtab_section
4709 || i
== tdata
->symtab_shndx_section
4710 || i
== tdata
->strtab_section
)
4712 hdr
->sh_offset
= -1;
4715 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4717 if (i
== SHN_LORESERVE
- 1)
4719 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4720 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4727 Elf_Internal_Shdr
**hdrpp
;
4729 /* Assign file positions for the loaded sections based on the
4730 assignment of sections to segments. */
4731 if (! assign_file_positions_for_segments (abfd
, link_info
))
4734 /* Assign file positions for the other sections. */
4736 off
= elf_tdata (abfd
)->next_file_pos
;
4737 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4739 Elf_Internal_Shdr
*hdr
;
4742 if (hdr
->bfd_section
!= NULL
4743 && hdr
->bfd_section
->filepos
!= 0)
4744 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4745 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4747 ((*_bfd_error_handler
)
4748 (_("%B: warning: allocated section `%s' not in segment"),
4750 (hdr
->bfd_section
== NULL
4752 : hdr
->bfd_section
->name
)));
4753 if ((abfd
->flags
& D_PAGED
) != 0)
4754 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4757 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4759 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4762 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4763 && hdr
->bfd_section
== NULL
)
4764 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4765 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4766 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4767 hdr
->sh_offset
= -1;
4769 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4771 if (i
== SHN_LORESERVE
- 1)
4773 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4774 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4779 /* Place the section headers. */
4780 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4781 i_ehdrp
->e_shoff
= off
;
4782 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4784 elf_tdata (abfd
)->next_file_pos
= off
;
4790 prep_headers (bfd
*abfd
)
4792 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4793 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4794 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4795 struct elf_strtab_hash
*shstrtab
;
4796 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4798 i_ehdrp
= elf_elfheader (abfd
);
4799 i_shdrp
= elf_elfsections (abfd
);
4801 shstrtab
= _bfd_elf_strtab_init ();
4802 if (shstrtab
== NULL
)
4805 elf_shstrtab (abfd
) = shstrtab
;
4807 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4808 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4809 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4810 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4812 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4813 i_ehdrp
->e_ident
[EI_DATA
] =
4814 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4815 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4817 if ((abfd
->flags
& DYNAMIC
) != 0)
4818 i_ehdrp
->e_type
= ET_DYN
;
4819 else if ((abfd
->flags
& EXEC_P
) != 0)
4820 i_ehdrp
->e_type
= ET_EXEC
;
4821 else if (bfd_get_format (abfd
) == bfd_core
)
4822 i_ehdrp
->e_type
= ET_CORE
;
4824 i_ehdrp
->e_type
= ET_REL
;
4826 switch (bfd_get_arch (abfd
))
4828 case bfd_arch_unknown
:
4829 i_ehdrp
->e_machine
= EM_NONE
;
4832 /* There used to be a long list of cases here, each one setting
4833 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4834 in the corresponding bfd definition. To avoid duplication,
4835 the switch was removed. Machines that need special handling
4836 can generally do it in elf_backend_final_write_processing(),
4837 unless they need the information earlier than the final write.
4838 Such need can generally be supplied by replacing the tests for
4839 e_machine with the conditions used to determine it. */
4841 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4844 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4845 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4847 /* No program header, for now. */
4848 i_ehdrp
->e_phoff
= 0;
4849 i_ehdrp
->e_phentsize
= 0;
4850 i_ehdrp
->e_phnum
= 0;
4852 /* Each bfd section is section header entry. */
4853 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4854 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4856 /* If we're building an executable, we'll need a program header table. */
4857 if (abfd
->flags
& EXEC_P
)
4858 /* It all happens later. */
4862 i_ehdrp
->e_phentsize
= 0;
4864 i_ehdrp
->e_phoff
= 0;
4867 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4868 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4869 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4870 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4871 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4872 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4873 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4874 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4875 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4881 /* Assign file positions for all the reloc sections which are not part
4882 of the loadable file image. */
4885 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4888 unsigned int i
, num_sec
;
4889 Elf_Internal_Shdr
**shdrpp
;
4891 off
= elf_tdata (abfd
)->next_file_pos
;
4893 num_sec
= elf_numsections (abfd
);
4894 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4896 Elf_Internal_Shdr
*shdrp
;
4899 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4900 && shdrp
->sh_offset
== -1)
4901 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4904 elf_tdata (abfd
)->next_file_pos
= off
;
4908 _bfd_elf_write_object_contents (bfd
*abfd
)
4910 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4911 Elf_Internal_Ehdr
*i_ehdrp
;
4912 Elf_Internal_Shdr
**i_shdrp
;
4914 unsigned int count
, num_sec
;
4916 if (! abfd
->output_has_begun
4917 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4920 i_shdrp
= elf_elfsections (abfd
);
4921 i_ehdrp
= elf_elfheader (abfd
);
4924 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4928 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4930 /* After writing the headers, we need to write the sections too... */
4931 num_sec
= elf_numsections (abfd
);
4932 for (count
= 1; count
< num_sec
; count
++)
4934 if (bed
->elf_backend_section_processing
)
4935 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4936 if (i_shdrp
[count
]->contents
)
4938 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4940 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4941 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4944 if (count
== SHN_LORESERVE
- 1)
4945 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4948 /* Write out the section header names. */
4949 if (elf_shstrtab (abfd
) != NULL
4950 && (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4951 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
))))
4954 if (bed
->elf_backend_final_write_processing
)
4955 (*bed
->elf_backend_final_write_processing
) (abfd
,
4956 elf_tdata (abfd
)->linker
);
4958 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4962 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4964 /* Hopefully this can be done just like an object file. */
4965 return _bfd_elf_write_object_contents (abfd
);
4968 /* Given a section, search the header to find them. */
4971 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4973 const struct elf_backend_data
*bed
;
4976 if (elf_section_data (asect
) != NULL
4977 && elf_section_data (asect
)->this_idx
!= 0)
4978 return elf_section_data (asect
)->this_idx
;
4980 if (bfd_is_abs_section (asect
))
4982 else if (bfd_is_com_section (asect
))
4984 else if (bfd_is_und_section (asect
))
4989 bed
= get_elf_backend_data (abfd
);
4990 if (bed
->elf_backend_section_from_bfd_section
)
4994 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4999 bfd_set_error (bfd_error_nonrepresentable_section
);
5004 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
5008 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
5010 asymbol
*asym_ptr
= *asym_ptr_ptr
;
5012 flagword flags
= asym_ptr
->flags
;
5014 /* When gas creates relocations against local labels, it creates its
5015 own symbol for the section, but does put the symbol into the
5016 symbol chain, so udata is 0. When the linker is generating
5017 relocatable output, this section symbol may be for one of the
5018 input sections rather than the output section. */
5019 if (asym_ptr
->udata
.i
== 0
5020 && (flags
& BSF_SECTION_SYM
)
5021 && asym_ptr
->section
)
5025 if (asym_ptr
->section
->output_section
!= NULL
)
5026 indx
= asym_ptr
->section
->output_section
->index
;
5028 indx
= asym_ptr
->section
->index
;
5029 if (indx
< elf_num_section_syms (abfd
)
5030 && elf_section_syms (abfd
)[indx
] != NULL
)
5031 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
5034 idx
= asym_ptr
->udata
.i
;
5038 /* This case can occur when using --strip-symbol on a symbol
5039 which is used in a relocation entry. */
5040 (*_bfd_error_handler
)
5041 (_("%B: symbol `%s' required but not present"),
5042 abfd
, bfd_asymbol_name (asym_ptr
));
5043 bfd_set_error (bfd_error_no_symbols
);
5050 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5051 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
5052 elf_symbol_flags (flags
));
5060 /* Copy private BFD data. This copies any program header information. */
5063 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5065 Elf_Internal_Ehdr
*iehdr
;
5066 struct elf_segment_map
*map
;
5067 struct elf_segment_map
*map_first
;
5068 struct elf_segment_map
**pointer_to_map
;
5069 Elf_Internal_Phdr
*segment
;
5072 unsigned int num_segments
;
5073 bfd_boolean phdr_included
= FALSE
;
5074 bfd_vma maxpagesize
;
5075 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5076 unsigned int phdr_adjust_num
= 0;
5077 const struct elf_backend_data
*bed
;
5079 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5080 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5083 if (elf_tdata (ibfd
)->phdr
== NULL
)
5086 bed
= get_elf_backend_data (ibfd
);
5087 iehdr
= elf_elfheader (ibfd
);
5090 pointer_to_map
= &map_first
;
5092 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5093 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5095 /* Returns the end address of the segment + 1. */
5096 #define SEGMENT_END(segment, start) \
5097 (start + (segment->p_memsz > segment->p_filesz \
5098 ? segment->p_memsz : segment->p_filesz))
5100 #define SECTION_SIZE(section, segment) \
5101 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5102 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5103 ? section->size : 0)
5105 /* Returns TRUE if the given section is contained within
5106 the given segment. VMA addresses are compared. */
5107 #define IS_CONTAINED_BY_VMA(section, segment) \
5108 (section->vma >= segment->p_vaddr \
5109 && (section->vma + SECTION_SIZE (section, segment) \
5110 <= (SEGMENT_END (segment, segment->p_vaddr))))
5112 /* Returns TRUE if the given section is contained within
5113 the given segment. LMA addresses are compared. */
5114 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5115 (section->lma >= base \
5116 && (section->lma + SECTION_SIZE (section, segment) \
5117 <= SEGMENT_END (segment, base)))
5119 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5120 #define IS_COREFILE_NOTE(p, s) \
5121 (p->p_type == PT_NOTE \
5122 && bfd_get_format (ibfd) == bfd_core \
5123 && s->vma == 0 && s->lma == 0 \
5124 && (bfd_vma) s->filepos >= p->p_offset \
5125 && ((bfd_vma) s->filepos + s->size \
5126 <= p->p_offset + p->p_filesz))
5128 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5129 linker, which generates a PT_INTERP section with p_vaddr and
5130 p_memsz set to 0. */
5131 #define IS_SOLARIS_PT_INTERP(p, s) \
5133 && p->p_paddr == 0 \
5134 && p->p_memsz == 0 \
5135 && p->p_filesz > 0 \
5136 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5138 && (bfd_vma) s->filepos >= p->p_offset \
5139 && ((bfd_vma) s->filepos + s->size \
5140 <= p->p_offset + p->p_filesz))
5142 /* Decide if the given section should be included in the given segment.
5143 A section will be included if:
5144 1. It is within the address space of the segment -- we use the LMA
5145 if that is set for the segment and the VMA otherwise,
5146 2. It is an allocated segment,
5147 3. There is an output section associated with it,
5148 4. The section has not already been allocated to a previous segment.
5149 5. PT_GNU_STACK segments do not include any sections.
5150 6. PT_TLS segment includes only SHF_TLS sections.
5151 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5152 8. PT_DYNAMIC should not contain empty sections at the beginning
5153 (with the possible exception of .dynamic). */
5154 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5155 ((((segment->p_paddr \
5156 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5157 : IS_CONTAINED_BY_VMA (section, segment)) \
5158 && (section->flags & SEC_ALLOC) != 0) \
5159 || IS_COREFILE_NOTE (segment, section)) \
5160 && section->output_section != NULL \
5161 && segment->p_type != PT_GNU_STACK \
5162 && (segment->p_type != PT_TLS \
5163 || (section->flags & SEC_THREAD_LOCAL)) \
5164 && (segment->p_type == PT_LOAD \
5165 || segment->p_type == PT_TLS \
5166 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5167 && (segment->p_type != PT_DYNAMIC \
5168 || SECTION_SIZE (section, segment) > 0 \
5169 || (segment->p_paddr \
5170 ? segment->p_paddr != section->lma \
5171 : segment->p_vaddr != section->vma) \
5172 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5174 && ! section->segment_mark)
5176 /* Returns TRUE iff seg1 starts after the end of seg2. */
5177 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5178 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5180 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5181 their VMA address ranges and their LMA address ranges overlap.
5182 It is possible to have overlapping VMA ranges without overlapping LMA
5183 ranges. RedBoot images for example can have both .data and .bss mapped
5184 to the same VMA range, but with the .data section mapped to a different
5186 #define SEGMENT_OVERLAPS(seg1, seg2) \
5187 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5188 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5189 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5190 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5192 /* Initialise the segment mark field. */
5193 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5194 section
->segment_mark
= FALSE
;
5196 /* Scan through the segments specified in the program header
5197 of the input BFD. For this first scan we look for overlaps
5198 in the loadable segments. These can be created by weird
5199 parameters to objcopy. Also, fix some solaris weirdness. */
5200 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5205 Elf_Internal_Phdr
*segment2
;
5207 if (segment
->p_type
== PT_INTERP
)
5208 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5209 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5211 /* Mininal change so that the normal section to segment
5212 assignment code will work. */
5213 segment
->p_vaddr
= section
->vma
;
5217 if (segment
->p_type
!= PT_LOAD
)
5220 /* Determine if this segment overlaps any previous segments. */
5221 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5223 bfd_signed_vma extra_length
;
5225 if (segment2
->p_type
!= PT_LOAD
5226 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5229 /* Merge the two segments together. */
5230 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5232 /* Extend SEGMENT2 to include SEGMENT and then delete
5235 SEGMENT_END (segment
, segment
->p_vaddr
)
5236 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5238 if (extra_length
> 0)
5240 segment2
->p_memsz
+= extra_length
;
5241 segment2
->p_filesz
+= extra_length
;
5244 segment
->p_type
= PT_NULL
;
5246 /* Since we have deleted P we must restart the outer loop. */
5248 segment
= elf_tdata (ibfd
)->phdr
;
5253 /* Extend SEGMENT to include SEGMENT2 and then delete
5256 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5257 - SEGMENT_END (segment
, segment
->p_vaddr
);
5259 if (extra_length
> 0)
5261 segment
->p_memsz
+= extra_length
;
5262 segment
->p_filesz
+= extra_length
;
5265 segment2
->p_type
= PT_NULL
;
5270 /* The second scan attempts to assign sections to segments. */
5271 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5275 unsigned int section_count
;
5276 asection
** sections
;
5277 asection
* output_section
;
5279 bfd_vma matching_lma
;
5280 bfd_vma suggested_lma
;
5284 if (segment
->p_type
== PT_NULL
)
5287 /* Compute how many sections might be placed into this segment. */
5288 for (section
= ibfd
->sections
, section_count
= 0;
5290 section
= section
->next
)
5291 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5294 /* Allocate a segment map big enough to contain
5295 all of the sections we have selected. */
5296 amt
= sizeof (struct elf_segment_map
);
5297 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5298 map
= bfd_alloc (obfd
, amt
);
5302 /* Initialise the fields of the segment map. Default to
5303 using the physical address of the segment in the input BFD. */
5305 map
->p_type
= segment
->p_type
;
5306 map
->p_flags
= segment
->p_flags
;
5307 map
->p_flags_valid
= 1;
5308 map
->p_paddr
= segment
->p_paddr
;
5309 map
->p_paddr_valid
= 1;
5311 /* Determine if this segment contains the ELF file header
5312 and if it contains the program headers themselves. */
5313 map
->includes_filehdr
= (segment
->p_offset
== 0
5314 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5316 map
->includes_phdrs
= 0;
5318 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5320 map
->includes_phdrs
=
5321 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5322 && (segment
->p_offset
+ segment
->p_filesz
5323 >= ((bfd_vma
) iehdr
->e_phoff
5324 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5326 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5327 phdr_included
= TRUE
;
5330 if (section_count
== 0)
5332 /* Special segments, such as the PT_PHDR segment, may contain
5333 no sections, but ordinary, loadable segments should contain
5334 something. They are allowed by the ELF spec however, so only
5335 a warning is produced. */
5336 if (segment
->p_type
== PT_LOAD
)
5337 (*_bfd_error_handler
)
5338 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5342 *pointer_to_map
= map
;
5343 pointer_to_map
= &map
->next
;
5348 /* Now scan the sections in the input BFD again and attempt
5349 to add their corresponding output sections to the segment map.
5350 The problem here is how to handle an output section which has
5351 been moved (ie had its LMA changed). There are four possibilities:
5353 1. None of the sections have been moved.
5354 In this case we can continue to use the segment LMA from the
5357 2. All of the sections have been moved by the same amount.
5358 In this case we can change the segment's LMA to match the LMA
5359 of the first section.
5361 3. Some of the sections have been moved, others have not.
5362 In this case those sections which have not been moved can be
5363 placed in the current segment which will have to have its size,
5364 and possibly its LMA changed, and a new segment or segments will
5365 have to be created to contain the other sections.
5367 4. The sections have been moved, but not by the same amount.
5368 In this case we can change the segment's LMA to match the LMA
5369 of the first section and we will have to create a new segment
5370 or segments to contain the other sections.
5372 In order to save time, we allocate an array to hold the section
5373 pointers that we are interested in. As these sections get assigned
5374 to a segment, they are removed from this array. */
5376 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5377 to work around this long long bug. */
5378 amt
= section_count
* sizeof (asection
*);
5379 sections
= bfd_malloc (amt
);
5380 if (sections
== NULL
)
5383 /* Step One: Scan for segment vs section LMA conflicts.
5384 Also add the sections to the section array allocated above.
5385 Also add the sections to the current segment. In the common
5386 case, where the sections have not been moved, this means that
5387 we have completely filled the segment, and there is nothing
5393 for (j
= 0, section
= ibfd
->sections
;
5395 section
= section
->next
)
5397 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5399 output_section
= section
->output_section
;
5401 sections
[j
++] = section
;
5403 /* The Solaris native linker always sets p_paddr to 0.
5404 We try to catch that case here, and set it to the
5405 correct value. Note - some backends require that
5406 p_paddr be left as zero. */
5407 if (segment
->p_paddr
== 0
5408 && segment
->p_vaddr
!= 0
5409 && (! bed
->want_p_paddr_set_to_zero
)
5411 && output_section
->lma
!= 0
5412 && (output_section
->vma
== (segment
->p_vaddr
5413 + (map
->includes_filehdr
5416 + (map
->includes_phdrs
5418 * iehdr
->e_phentsize
)
5420 map
->p_paddr
= segment
->p_vaddr
;
5422 /* Match up the physical address of the segment with the
5423 LMA address of the output section. */
5424 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5425 || IS_COREFILE_NOTE (segment
, section
)
5426 || (bed
->want_p_paddr_set_to_zero
&&
5427 IS_CONTAINED_BY_VMA (output_section
, segment
))
5430 if (matching_lma
== 0)
5431 matching_lma
= output_section
->lma
;
5433 /* We assume that if the section fits within the segment
5434 then it does not overlap any other section within that
5436 map
->sections
[isec
++] = output_section
;
5438 else if (suggested_lma
== 0)
5439 suggested_lma
= output_section
->lma
;
5443 BFD_ASSERT (j
== section_count
);
5445 /* Step Two: Adjust the physical address of the current segment,
5447 if (isec
== section_count
)
5449 /* All of the sections fitted within the segment as currently
5450 specified. This is the default case. Add the segment to
5451 the list of built segments and carry on to process the next
5452 program header in the input BFD. */
5453 map
->count
= section_count
;
5454 *pointer_to_map
= map
;
5455 pointer_to_map
= &map
->next
;
5462 if (matching_lma
!= 0)
5464 /* At least one section fits inside the current segment.
5465 Keep it, but modify its physical address to match the
5466 LMA of the first section that fitted. */
5467 map
->p_paddr
= matching_lma
;
5471 /* None of the sections fitted inside the current segment.
5472 Change the current segment's physical address to match
5473 the LMA of the first section. */
5474 map
->p_paddr
= suggested_lma
;
5477 /* Offset the segment physical address from the lma
5478 to allow for space taken up by elf headers. */
5479 if (map
->includes_filehdr
)
5480 map
->p_paddr
-= iehdr
->e_ehsize
;
5482 if (map
->includes_phdrs
)
5484 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5486 /* iehdr->e_phnum is just an estimate of the number
5487 of program headers that we will need. Make a note
5488 here of the number we used and the segment we chose
5489 to hold these headers, so that we can adjust the
5490 offset when we know the correct value. */
5491 phdr_adjust_num
= iehdr
->e_phnum
;
5492 phdr_adjust_seg
= map
;
5496 /* Step Three: Loop over the sections again, this time assigning
5497 those that fit to the current segment and removing them from the
5498 sections array; but making sure not to leave large gaps. Once all
5499 possible sections have been assigned to the current segment it is
5500 added to the list of built segments and if sections still remain
5501 to be assigned, a new segment is constructed before repeating
5509 /* Fill the current segment with sections that fit. */
5510 for (j
= 0; j
< section_count
; j
++)
5512 section
= sections
[j
];
5514 if (section
== NULL
)
5517 output_section
= section
->output_section
;
5519 BFD_ASSERT (output_section
!= NULL
);
5521 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5522 || IS_COREFILE_NOTE (segment
, section
))
5524 if (map
->count
== 0)
5526 /* If the first section in a segment does not start at
5527 the beginning of the segment, then something is
5529 if (output_section
->lma
!=
5531 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5532 + (map
->includes_phdrs
5533 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5539 asection
* prev_sec
;
5541 prev_sec
= map
->sections
[map
->count
- 1];
5543 /* If the gap between the end of the previous section
5544 and the start of this section is more than
5545 maxpagesize then we need to start a new segment. */
5546 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5548 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5549 || ((prev_sec
->lma
+ prev_sec
->size
)
5550 > output_section
->lma
))
5552 if (suggested_lma
== 0)
5553 suggested_lma
= output_section
->lma
;
5559 map
->sections
[map
->count
++] = output_section
;
5562 section
->segment_mark
= TRUE
;
5564 else if (suggested_lma
== 0)
5565 suggested_lma
= output_section
->lma
;
5568 BFD_ASSERT (map
->count
> 0);
5570 /* Add the current segment to the list of built segments. */
5571 *pointer_to_map
= map
;
5572 pointer_to_map
= &map
->next
;
5574 if (isec
< section_count
)
5576 /* We still have not allocated all of the sections to
5577 segments. Create a new segment here, initialise it
5578 and carry on looping. */
5579 amt
= sizeof (struct elf_segment_map
);
5580 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5581 map
= bfd_alloc (obfd
, amt
);
5588 /* Initialise the fields of the segment map. Set the physical
5589 physical address to the LMA of the first section that has
5590 not yet been assigned. */
5592 map
->p_type
= segment
->p_type
;
5593 map
->p_flags
= segment
->p_flags
;
5594 map
->p_flags_valid
= 1;
5595 map
->p_paddr
= suggested_lma
;
5596 map
->p_paddr_valid
= 1;
5597 map
->includes_filehdr
= 0;
5598 map
->includes_phdrs
= 0;
5601 while (isec
< section_count
);
5606 /* The Solaris linker creates program headers in which all the
5607 p_paddr fields are zero. When we try to objcopy or strip such a
5608 file, we get confused. Check for this case, and if we find it
5609 reset the p_paddr_valid fields. */
5610 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5611 if (map
->p_paddr
!= 0)
5614 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5615 map
->p_paddr_valid
= 0;
5617 elf_tdata (obfd
)->segment_map
= map_first
;
5619 /* If we had to estimate the number of program headers that were
5620 going to be needed, then check our estimate now and adjust
5621 the offset if necessary. */
5622 if (phdr_adjust_seg
!= NULL
)
5626 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5629 if (count
> phdr_adjust_num
)
5630 phdr_adjust_seg
->p_paddr
5631 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5636 #undef IS_CONTAINED_BY_VMA
5637 #undef IS_CONTAINED_BY_LMA
5638 #undef IS_COREFILE_NOTE
5639 #undef IS_SOLARIS_PT_INTERP
5640 #undef INCLUDE_SECTION_IN_SEGMENT
5641 #undef SEGMENT_AFTER_SEGMENT
5642 #undef SEGMENT_OVERLAPS
5646 /* Copy private section information. This copies over the entsize
5647 field, and sometimes the info field. */
5650 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5655 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5657 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5658 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5661 ihdr
= &elf_section_data (isec
)->this_hdr
;
5662 ohdr
= &elf_section_data (osec
)->this_hdr
;
5664 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5666 if (ihdr
->sh_type
== SHT_SYMTAB
5667 || ihdr
->sh_type
== SHT_DYNSYM
5668 || ihdr
->sh_type
== SHT_GNU_verneed
5669 || ihdr
->sh_type
== SHT_GNU_verdef
)
5670 ohdr
->sh_info
= ihdr
->sh_info
;
5672 /* Set things up for objcopy. The output SHT_GROUP section will
5673 have its elf_next_in_group pointing back to the input group
5674 members. Ignore linker created group section. See
5675 elfNN_ia64_object_p in elfxx-ia64.c. */
5676 if (elf_sec_group (isec
) == NULL
5677 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5679 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5680 elf_group_name (osec
) = elf_group_name (isec
);
5683 osec
->use_rela_p
= isec
->use_rela_p
;
5688 /* Copy private header information. */
5691 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5693 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5694 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5697 /* Copy over private BFD data if it has not already been copied.
5698 This must be done here, rather than in the copy_private_bfd_data
5699 entry point, because the latter is called after the section
5700 contents have been set, which means that the program headers have
5701 already been worked out. */
5702 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5704 if (! copy_private_bfd_data (ibfd
, obfd
))
5711 /* Copy private symbol information. If this symbol is in a section
5712 which we did not map into a BFD section, try to map the section
5713 index correctly. We use special macro definitions for the mapped
5714 section indices; these definitions are interpreted by the
5715 swap_out_syms function. */
5717 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5718 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5719 #define MAP_STRTAB (SHN_HIOS + 3)
5720 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5721 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5724 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5729 elf_symbol_type
*isym
, *osym
;
5731 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5732 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5735 isym
= elf_symbol_from (ibfd
, isymarg
);
5736 osym
= elf_symbol_from (obfd
, osymarg
);
5740 && bfd_is_abs_section (isym
->symbol
.section
))
5744 shndx
= isym
->internal_elf_sym
.st_shndx
;
5745 if (shndx
== elf_onesymtab (ibfd
))
5746 shndx
= MAP_ONESYMTAB
;
5747 else if (shndx
== elf_dynsymtab (ibfd
))
5748 shndx
= MAP_DYNSYMTAB
;
5749 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5751 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5752 shndx
= MAP_SHSTRTAB
;
5753 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5754 shndx
= MAP_SYM_SHNDX
;
5755 osym
->internal_elf_sym
.st_shndx
= shndx
;
5761 /* Swap out the symbols. */
5764 swap_out_syms (bfd
*abfd
,
5765 struct bfd_strtab_hash
**sttp
,
5768 const struct elf_backend_data
*bed
;
5771 struct bfd_strtab_hash
*stt
;
5772 Elf_Internal_Shdr
*symtab_hdr
;
5773 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5774 Elf_Internal_Shdr
*symstrtab_hdr
;
5775 bfd_byte
*outbound_syms
;
5776 bfd_byte
*outbound_shndx
;
5779 bfd_boolean name_local_sections
;
5781 if (!elf_map_symbols (abfd
))
5784 /* Dump out the symtabs. */
5785 stt
= _bfd_elf_stringtab_init ();
5789 bed
= get_elf_backend_data (abfd
);
5790 symcount
= bfd_get_symcount (abfd
);
5791 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5792 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5793 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5794 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5795 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5796 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5798 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5799 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5801 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5802 outbound_syms
= bfd_alloc (abfd
, amt
);
5803 if (outbound_syms
== NULL
)
5805 _bfd_stringtab_free (stt
);
5808 symtab_hdr
->contents
= outbound_syms
;
5810 outbound_shndx
= NULL
;
5811 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5812 if (symtab_shndx_hdr
->sh_name
!= 0)
5814 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5815 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5816 if (outbound_shndx
== NULL
)
5818 _bfd_stringtab_free (stt
);
5822 symtab_shndx_hdr
->contents
= outbound_shndx
;
5823 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5824 symtab_shndx_hdr
->sh_size
= amt
;
5825 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5826 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5829 /* Now generate the data (for "contents"). */
5831 /* Fill in zeroth symbol and swap it out. */
5832 Elf_Internal_Sym sym
;
5838 sym
.st_shndx
= SHN_UNDEF
;
5839 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5840 outbound_syms
+= bed
->s
->sizeof_sym
;
5841 if (outbound_shndx
!= NULL
)
5842 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5846 = (bed
->elf_backend_name_local_section_symbols
5847 && bed
->elf_backend_name_local_section_symbols (abfd
));
5849 syms
= bfd_get_outsymbols (abfd
);
5850 for (idx
= 0; idx
< symcount
; idx
++)
5852 Elf_Internal_Sym sym
;
5853 bfd_vma value
= syms
[idx
]->value
;
5854 elf_symbol_type
*type_ptr
;
5855 flagword flags
= syms
[idx
]->flags
;
5858 if (!name_local_sections
5859 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5861 /* Local section symbols have no name. */
5866 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5869 if (sym
.st_name
== (unsigned long) -1)
5871 _bfd_stringtab_free (stt
);
5876 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5878 if ((flags
& BSF_SECTION_SYM
) == 0
5879 && bfd_is_com_section (syms
[idx
]->section
))
5881 /* ELF common symbols put the alignment into the `value' field,
5882 and the size into the `size' field. This is backwards from
5883 how BFD handles it, so reverse it here. */
5884 sym
.st_size
= value
;
5885 if (type_ptr
== NULL
5886 || type_ptr
->internal_elf_sym
.st_value
== 0)
5887 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5889 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5890 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5891 (abfd
, syms
[idx
]->section
);
5895 asection
*sec
= syms
[idx
]->section
;
5898 if (sec
->output_section
)
5900 value
+= sec
->output_offset
;
5901 sec
= sec
->output_section
;
5904 /* Don't add in the section vma for relocatable output. */
5905 if (! relocatable_p
)
5907 sym
.st_value
= value
;
5908 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5910 if (bfd_is_abs_section (sec
)
5912 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5914 /* This symbol is in a real ELF section which we did
5915 not create as a BFD section. Undo the mapping done
5916 by copy_private_symbol_data. */
5917 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5921 shndx
= elf_onesymtab (abfd
);
5924 shndx
= elf_dynsymtab (abfd
);
5927 shndx
= elf_tdata (abfd
)->strtab_section
;
5930 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5933 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5941 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5947 /* Writing this would be a hell of a lot easier if
5948 we had some decent documentation on bfd, and
5949 knew what to expect of the library, and what to
5950 demand of applications. For example, it
5951 appears that `objcopy' might not set the
5952 section of a symbol to be a section that is
5953 actually in the output file. */
5954 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5957 _bfd_error_handler (_("\
5958 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5959 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5961 bfd_set_error (bfd_error_invalid_operation
);
5962 _bfd_stringtab_free (stt
);
5966 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5967 BFD_ASSERT (shndx
!= -1);
5971 sym
.st_shndx
= shndx
;
5974 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5976 else if ((flags
& BSF_FUNCTION
) != 0)
5978 else if ((flags
& BSF_OBJECT
) != 0)
5983 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5986 /* Processor-specific types. */
5987 if (type_ptr
!= NULL
5988 && bed
->elf_backend_get_symbol_type
)
5989 type
= ((*bed
->elf_backend_get_symbol_type
)
5990 (&type_ptr
->internal_elf_sym
, type
));
5992 if (flags
& BSF_SECTION_SYM
)
5994 if (flags
& BSF_GLOBAL
)
5995 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5997 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5999 else if (bfd_is_com_section (syms
[idx
]->section
))
6000 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
6001 else if (bfd_is_und_section (syms
[idx
]->section
))
6002 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
6006 else if (flags
& BSF_FILE
)
6007 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
6010 int bind
= STB_LOCAL
;
6012 if (flags
& BSF_LOCAL
)
6014 else if (flags
& BSF_WEAK
)
6016 else if (flags
& BSF_GLOBAL
)
6019 sym
.st_info
= ELF_ST_INFO (bind
, type
);
6022 if (type_ptr
!= NULL
)
6023 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
6027 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
6028 outbound_syms
+= bed
->s
->sizeof_sym
;
6029 if (outbound_shndx
!= NULL
)
6030 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
6034 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6035 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6037 symstrtab_hdr
->sh_flags
= 0;
6038 symstrtab_hdr
->sh_addr
= 0;
6039 symstrtab_hdr
->sh_entsize
= 0;
6040 symstrtab_hdr
->sh_link
= 0;
6041 symstrtab_hdr
->sh_info
= 0;
6042 symstrtab_hdr
->sh_addralign
= 1;
6047 /* Return the number of bytes required to hold the symtab vector.
6049 Note that we base it on the count plus 1, since we will null terminate
6050 the vector allocated based on this size. However, the ELF symbol table
6051 always has a dummy entry as symbol #0, so it ends up even. */
6054 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6058 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6060 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6061 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6063 symtab_size
-= sizeof (asymbol
*);
6069 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6073 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6075 if (elf_dynsymtab (abfd
) == 0)
6077 bfd_set_error (bfd_error_invalid_operation
);
6081 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6082 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6084 symtab_size
-= sizeof (asymbol
*);
6090 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6093 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6096 /* Canonicalize the relocs. */
6099 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6106 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6108 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6111 tblptr
= section
->relocation
;
6112 for (i
= 0; i
< section
->reloc_count
; i
++)
6113 *relptr
++ = tblptr
++;
6117 return section
->reloc_count
;
6121 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6123 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6124 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6127 bfd_get_symcount (abfd
) = symcount
;
6132 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6133 asymbol
**allocation
)
6135 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6136 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6139 bfd_get_dynamic_symcount (abfd
) = symcount
;
6143 /* Return the size required for the dynamic reloc entries. Any loadable
6144 section that was actually installed in the BFD, and has type SHT_REL
6145 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6146 dynamic reloc section. */
6149 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6154 if (elf_dynsymtab (abfd
) == 0)
6156 bfd_set_error (bfd_error_invalid_operation
);
6160 ret
= sizeof (arelent
*);
6161 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6162 if ((s
->flags
& SEC_LOAD
) != 0
6163 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6164 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6165 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6166 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6167 * sizeof (arelent
*));
6172 /* Canonicalize the dynamic relocation entries. Note that we return the
6173 dynamic relocations as a single block, although they are actually
6174 associated with particular sections; the interface, which was
6175 designed for SunOS style shared libraries, expects that there is only
6176 one set of dynamic relocs. Any loadable section that was actually
6177 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6178 dynamic symbol table, is considered to be a dynamic reloc section. */
6181 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6185 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6189 if (elf_dynsymtab (abfd
) == 0)
6191 bfd_set_error (bfd_error_invalid_operation
);
6195 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6197 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6199 if ((s
->flags
& SEC_LOAD
) != 0
6200 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6201 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6202 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6207 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6209 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6211 for (i
= 0; i
< count
; i
++)
6222 /* Read in the version information. */
6225 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6227 bfd_byte
*contents
= NULL
;
6229 unsigned int freeidx
= 0;
6231 if (elf_dynverref (abfd
) != 0)
6233 Elf_Internal_Shdr
*hdr
;
6234 Elf_External_Verneed
*everneed
;
6235 Elf_Internal_Verneed
*iverneed
;
6238 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6240 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6241 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6242 if (elf_tdata (abfd
)->verref
== NULL
)
6245 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6247 contents
= bfd_malloc (hdr
->sh_size
);
6248 if (contents
== NULL
)
6250 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6251 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6254 everneed
= (Elf_External_Verneed
*) contents
;
6255 iverneed
= elf_tdata (abfd
)->verref
;
6256 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6258 Elf_External_Vernaux
*evernaux
;
6259 Elf_Internal_Vernaux
*ivernaux
;
6262 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6264 iverneed
->vn_bfd
= abfd
;
6266 iverneed
->vn_filename
=
6267 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6269 if (iverneed
->vn_filename
== NULL
)
6272 amt
= iverneed
->vn_cnt
;
6273 amt
*= sizeof (Elf_Internal_Vernaux
);
6274 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6276 evernaux
= ((Elf_External_Vernaux
*)
6277 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6278 ivernaux
= iverneed
->vn_auxptr
;
6279 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6281 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6283 ivernaux
->vna_nodename
=
6284 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6285 ivernaux
->vna_name
);
6286 if (ivernaux
->vna_nodename
== NULL
)
6289 if (j
+ 1 < iverneed
->vn_cnt
)
6290 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6292 ivernaux
->vna_nextptr
= NULL
;
6294 evernaux
= ((Elf_External_Vernaux
*)
6295 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6297 if (ivernaux
->vna_other
> freeidx
)
6298 freeidx
= ivernaux
->vna_other
;
6301 if (i
+ 1 < hdr
->sh_info
)
6302 iverneed
->vn_nextref
= iverneed
+ 1;
6304 iverneed
->vn_nextref
= NULL
;
6306 everneed
= ((Elf_External_Verneed
*)
6307 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6314 if (elf_dynverdef (abfd
) != 0)
6316 Elf_Internal_Shdr
*hdr
;
6317 Elf_External_Verdef
*everdef
;
6318 Elf_Internal_Verdef
*iverdef
;
6319 Elf_Internal_Verdef
*iverdefarr
;
6320 Elf_Internal_Verdef iverdefmem
;
6322 unsigned int maxidx
;
6324 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6326 contents
= bfd_malloc (hdr
->sh_size
);
6327 if (contents
== NULL
)
6329 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6330 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6333 /* We know the number of entries in the section but not the maximum
6334 index. Therefore we have to run through all entries and find
6336 everdef
= (Elf_External_Verdef
*) contents
;
6338 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6340 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6342 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6343 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6345 everdef
= ((Elf_External_Verdef
*)
6346 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6349 if (default_imported_symver
)
6351 if (freeidx
> maxidx
)
6356 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6357 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6358 if (elf_tdata (abfd
)->verdef
== NULL
)
6361 elf_tdata (abfd
)->cverdefs
= maxidx
;
6363 everdef
= (Elf_External_Verdef
*) contents
;
6364 iverdefarr
= elf_tdata (abfd
)->verdef
;
6365 for (i
= 0; i
< hdr
->sh_info
; i
++)
6367 Elf_External_Verdaux
*everdaux
;
6368 Elf_Internal_Verdaux
*iverdaux
;
6371 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6373 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6374 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6376 iverdef
->vd_bfd
= abfd
;
6378 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6379 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6380 if (iverdef
->vd_auxptr
== NULL
)
6383 everdaux
= ((Elf_External_Verdaux
*)
6384 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6385 iverdaux
= iverdef
->vd_auxptr
;
6386 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6388 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6390 iverdaux
->vda_nodename
=
6391 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6392 iverdaux
->vda_name
);
6393 if (iverdaux
->vda_nodename
== NULL
)
6396 if (j
+ 1 < iverdef
->vd_cnt
)
6397 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6399 iverdaux
->vda_nextptr
= NULL
;
6401 everdaux
= ((Elf_External_Verdaux
*)
6402 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6405 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6407 if (i
+ 1 < hdr
->sh_info
)
6408 iverdef
->vd_nextdef
= iverdef
+ 1;
6410 iverdef
->vd_nextdef
= NULL
;
6412 everdef
= ((Elf_External_Verdef
*)
6413 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6419 else if (default_imported_symver
)
6426 amt
= (bfd_size_type
) freeidx
* sizeof (Elf_Internal_Verdef
);
6427 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6428 if (elf_tdata (abfd
)->verdef
== NULL
)
6431 elf_tdata (abfd
)->cverdefs
= freeidx
;
6434 /* Create a default version based on the soname. */
6435 if (default_imported_symver
)
6437 Elf_Internal_Verdef
*iverdef
;
6438 Elf_Internal_Verdaux
*iverdaux
;
6440 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6442 iverdef
->vd_version
= VER_DEF_CURRENT
;
6443 iverdef
->vd_flags
= 0;
6444 iverdef
->vd_ndx
= freeidx
;
6445 iverdef
->vd_cnt
= 1;
6447 iverdef
->vd_bfd
= abfd
;
6449 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6450 if (iverdef
->vd_nodename
== NULL
)
6452 iverdef
->vd_nextdef
= NULL
;
6453 amt
= (bfd_size_type
) sizeof (Elf_Internal_Verdaux
);
6454 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6456 iverdaux
= iverdef
->vd_auxptr
;
6457 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6458 iverdaux
->vda_nextptr
= NULL
;
6464 if (contents
!= NULL
)
6470 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6472 elf_symbol_type
*newsym
;
6473 bfd_size_type amt
= sizeof (elf_symbol_type
);
6475 newsym
= bfd_zalloc (abfd
, amt
);
6480 newsym
->symbol
.the_bfd
= abfd
;
6481 return &newsym
->symbol
;
6486 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6490 bfd_symbol_info (symbol
, ret
);
6493 /* Return whether a symbol name implies a local symbol. Most targets
6494 use this function for the is_local_label_name entry point, but some
6498 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6501 /* Normal local symbols start with ``.L''. */
6502 if (name
[0] == '.' && name
[1] == 'L')
6505 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6506 DWARF debugging symbols starting with ``..''. */
6507 if (name
[0] == '.' && name
[1] == '.')
6510 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6511 emitting DWARF debugging output. I suspect this is actually a
6512 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6513 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6514 underscore to be emitted on some ELF targets). For ease of use,
6515 we treat such symbols as local. */
6516 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6523 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6524 asymbol
*symbol ATTRIBUTE_UNUSED
)
6531 _bfd_elf_set_arch_mach (bfd
*abfd
,
6532 enum bfd_architecture arch
,
6533 unsigned long machine
)
6535 /* If this isn't the right architecture for this backend, and this
6536 isn't the generic backend, fail. */
6537 if (arch
!= get_elf_backend_data (abfd
)->arch
6538 && arch
!= bfd_arch_unknown
6539 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6542 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6545 /* Find the function to a particular section and offset,
6546 for error reporting. */
6549 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6553 const char **filename_ptr
,
6554 const char **functionname_ptr
)
6556 const char *filename
;
6557 asymbol
*func
, *file
;
6560 /* ??? Given multiple file symbols, it is impossible to reliably
6561 choose the right file name for global symbols. File symbols are
6562 local symbols, and thus all file symbols must sort before any
6563 global symbols. The ELF spec may be interpreted to say that a
6564 file symbol must sort before other local symbols, but currently
6565 ld -r doesn't do this. So, for ld -r output, it is possible to
6566 make a better choice of file name for local symbols by ignoring
6567 file symbols appearing after a given local symbol. */
6568 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6574 state
= nothing_seen
;
6576 for (p
= symbols
; *p
!= NULL
; p
++)
6580 q
= (elf_symbol_type
*) *p
;
6582 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6588 if (state
== symbol_seen
)
6589 state
= file_after_symbol_seen
;
6595 if (bfd_get_section (&q
->symbol
) == section
6596 && q
->symbol
.value
>= low_func
6597 && q
->symbol
.value
<= offset
)
6599 func
= (asymbol
*) q
;
6600 low_func
= q
->symbol
.value
;
6603 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6604 && state
== file_after_symbol_seen
)
6607 filename
= bfd_asymbol_name (file
);
6611 if (state
== nothing_seen
)
6612 state
= symbol_seen
;
6619 *filename_ptr
= filename
;
6620 if (functionname_ptr
)
6621 *functionname_ptr
= bfd_asymbol_name (func
);
6626 /* Find the nearest line to a particular section and offset,
6627 for error reporting. */
6630 _bfd_elf_find_nearest_line (bfd
*abfd
,
6634 const char **filename_ptr
,
6635 const char **functionname_ptr
,
6636 unsigned int *line_ptr
)
6640 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6641 filename_ptr
, functionname_ptr
,
6644 if (!*functionname_ptr
)
6645 elf_find_function (abfd
, section
, symbols
, offset
,
6646 *filename_ptr
? NULL
: filename_ptr
,
6652 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6653 filename_ptr
, functionname_ptr
,
6655 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6657 if (!*functionname_ptr
)
6658 elf_find_function (abfd
, section
, symbols
, offset
,
6659 *filename_ptr
? NULL
: filename_ptr
,
6665 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6666 &found
, filename_ptr
,
6667 functionname_ptr
, line_ptr
,
6668 &elf_tdata (abfd
)->line_info
))
6670 if (found
&& (*functionname_ptr
|| *line_ptr
))
6673 if (symbols
== NULL
)
6676 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6677 filename_ptr
, functionname_ptr
))
6684 /* Find the line for a symbol. */
6687 _bfd_elf_find_line (bfd
*abfd
, asymbol
**symbols
, asymbol
*symbol
,
6688 const char **filename_ptr
, unsigned int *line_ptr
)
6690 return _bfd_dwarf2_find_line (abfd
, symbols
, symbol
,
6691 filename_ptr
, line_ptr
, 0,
6692 &elf_tdata (abfd
)->dwarf2_find_line_info
);
6695 /* After a call to bfd_find_nearest_line, successive calls to
6696 bfd_find_inliner_info can be used to get source information about
6697 each level of function inlining that terminated at the address
6698 passed to bfd_find_nearest_line. Currently this is only supported
6699 for DWARF2 with appropriate DWARF3 extensions. */
6702 _bfd_elf_find_inliner_info (bfd
*abfd
,
6703 const char **filename_ptr
,
6704 const char **functionname_ptr
,
6705 unsigned int *line_ptr
)
6708 found
= _bfd_dwarf2_find_inliner_info (abfd
, filename_ptr
,
6709 functionname_ptr
, line_ptr
,
6710 & elf_tdata (abfd
)->dwarf2_find_line_info
);
6715 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6719 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6721 ret
+= get_program_header_size (abfd
);
6726 _bfd_elf_set_section_contents (bfd
*abfd
,
6728 const void *location
,
6730 bfd_size_type count
)
6732 Elf_Internal_Shdr
*hdr
;
6735 if (! abfd
->output_has_begun
6736 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6739 hdr
= &elf_section_data (section
)->this_hdr
;
6740 pos
= hdr
->sh_offset
+ offset
;
6741 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6742 || bfd_bwrite (location
, count
, abfd
) != count
)
6749 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6750 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6751 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6756 /* Try to convert a non-ELF reloc into an ELF one. */
6759 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6761 /* Check whether we really have an ELF howto. */
6763 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6765 bfd_reloc_code_real_type code
;
6766 reloc_howto_type
*howto
;
6768 /* Alien reloc: Try to determine its type to replace it with an
6769 equivalent ELF reloc. */
6771 if (areloc
->howto
->pc_relative
)
6773 switch (areloc
->howto
->bitsize
)
6776 code
= BFD_RELOC_8_PCREL
;
6779 code
= BFD_RELOC_12_PCREL
;
6782 code
= BFD_RELOC_16_PCREL
;
6785 code
= BFD_RELOC_24_PCREL
;
6788 code
= BFD_RELOC_32_PCREL
;
6791 code
= BFD_RELOC_64_PCREL
;
6797 howto
= bfd_reloc_type_lookup (abfd
, code
);
6799 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6801 if (howto
->pcrel_offset
)
6802 areloc
->addend
+= areloc
->address
;
6804 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6809 switch (areloc
->howto
->bitsize
)
6815 code
= BFD_RELOC_14
;
6818 code
= BFD_RELOC_16
;
6821 code
= BFD_RELOC_26
;
6824 code
= BFD_RELOC_32
;
6827 code
= BFD_RELOC_64
;
6833 howto
= bfd_reloc_type_lookup (abfd
, code
);
6837 areloc
->howto
= howto
;
6845 (*_bfd_error_handler
)
6846 (_("%B: unsupported relocation type %s"),
6847 abfd
, areloc
->howto
->name
);
6848 bfd_set_error (bfd_error_bad_value
);
6853 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6855 if (bfd_get_format (abfd
) == bfd_object
)
6857 if (elf_shstrtab (abfd
) != NULL
)
6858 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6859 _bfd_dwarf2_cleanup_debug_info (abfd
);
6862 return _bfd_generic_close_and_cleanup (abfd
);
6865 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6866 in the relocation's offset. Thus we cannot allow any sort of sanity
6867 range-checking to interfere. There is nothing else to do in processing
6870 bfd_reloc_status_type
6871 _bfd_elf_rel_vtable_reloc_fn
6872 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6873 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6874 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6875 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6877 return bfd_reloc_ok
;
6880 /* Elf core file support. Much of this only works on native
6881 toolchains, since we rely on knowing the
6882 machine-dependent procfs structure in order to pick
6883 out details about the corefile. */
6885 #ifdef HAVE_SYS_PROCFS_H
6886 # include <sys/procfs.h>
6889 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6892 elfcore_make_pid (bfd
*abfd
)
6894 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6895 + (elf_tdata (abfd
)->core_pid
));
6898 /* If there isn't a section called NAME, make one, using
6899 data from SECT. Note, this function will generate a
6900 reference to NAME, so you shouldn't deallocate or
6904 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6908 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6911 sect2
= bfd_make_section (abfd
, name
);
6915 sect2
->size
= sect
->size
;
6916 sect2
->filepos
= sect
->filepos
;
6917 sect2
->flags
= sect
->flags
;
6918 sect2
->alignment_power
= sect
->alignment_power
;
6922 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6923 actually creates up to two pseudosections:
6924 - For the single-threaded case, a section named NAME, unless
6925 such a section already exists.
6926 - For the multi-threaded case, a section named "NAME/PID", where
6927 PID is elfcore_make_pid (abfd).
6928 Both pseudosections have identical contents. */
6930 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6936 char *threaded_name
;
6940 /* Build the section name. */
6942 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6943 len
= strlen (buf
) + 1;
6944 threaded_name
= bfd_alloc (abfd
, len
);
6945 if (threaded_name
== NULL
)
6947 memcpy (threaded_name
, buf
, len
);
6949 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6953 sect
->filepos
= filepos
;
6954 sect
->flags
= SEC_HAS_CONTENTS
;
6955 sect
->alignment_power
= 2;
6957 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6960 /* prstatus_t exists on:
6962 linux 2.[01] + glibc
6966 #if defined (HAVE_PRSTATUS_T)
6969 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6974 if (note
->descsz
== sizeof (prstatus_t
))
6978 size
= sizeof (prstat
.pr_reg
);
6979 offset
= offsetof (prstatus_t
, pr_reg
);
6980 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6982 /* Do not overwrite the core signal if it
6983 has already been set by another thread. */
6984 if (elf_tdata (abfd
)->core_signal
== 0)
6985 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6986 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6988 /* pr_who exists on:
6991 pr_who doesn't exist on:
6994 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6995 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6998 #if defined (HAVE_PRSTATUS32_T)
6999 else if (note
->descsz
== sizeof (prstatus32_t
))
7001 /* 64-bit host, 32-bit corefile */
7002 prstatus32_t prstat
;
7004 size
= sizeof (prstat
.pr_reg
);
7005 offset
= offsetof (prstatus32_t
, pr_reg
);
7006 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
7008 /* Do not overwrite the core signal if it
7009 has already been set by another thread. */
7010 if (elf_tdata (abfd
)->core_signal
== 0)
7011 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
7012 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
7014 /* pr_who exists on:
7017 pr_who doesn't exist on:
7020 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
7021 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
7024 #endif /* HAVE_PRSTATUS32_T */
7027 /* Fail - we don't know how to handle any other
7028 note size (ie. data object type). */
7032 /* Make a ".reg/999" section and a ".reg" section. */
7033 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
7034 size
, note
->descpos
+ offset
);
7036 #endif /* defined (HAVE_PRSTATUS_T) */
7038 /* Create a pseudosection containing the exact contents of NOTE. */
7040 elfcore_make_note_pseudosection (bfd
*abfd
,
7042 Elf_Internal_Note
*note
)
7044 return _bfd_elfcore_make_pseudosection (abfd
, name
,
7045 note
->descsz
, note
->descpos
);
7048 /* There isn't a consistent prfpregset_t across platforms,
7049 but it doesn't matter, because we don't have to pick this
7050 data structure apart. */
7053 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7055 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7058 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
7059 type of 5 (NT_PRXFPREG). Just include the whole note's contents
7063 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7065 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7068 #if defined (HAVE_PRPSINFO_T)
7069 typedef prpsinfo_t elfcore_psinfo_t
;
7070 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7071 typedef prpsinfo32_t elfcore_psinfo32_t
;
7075 #if defined (HAVE_PSINFO_T)
7076 typedef psinfo_t elfcore_psinfo_t
;
7077 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7078 typedef psinfo32_t elfcore_psinfo32_t
;
7082 /* return a malloc'ed copy of a string at START which is at
7083 most MAX bytes long, possibly without a terminating '\0'.
7084 the copy will always have a terminating '\0'. */
7087 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7090 char *end
= memchr (start
, '\0', max
);
7098 dups
= bfd_alloc (abfd
, len
+ 1);
7102 memcpy (dups
, start
, len
);
7108 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7110 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7112 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7114 elfcore_psinfo_t psinfo
;
7116 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7118 elf_tdata (abfd
)->core_program
7119 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7120 sizeof (psinfo
.pr_fname
));
7122 elf_tdata (abfd
)->core_command
7123 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7124 sizeof (psinfo
.pr_psargs
));
7126 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7127 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7129 /* 64-bit host, 32-bit corefile */
7130 elfcore_psinfo32_t psinfo
;
7132 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7134 elf_tdata (abfd
)->core_program
7135 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7136 sizeof (psinfo
.pr_fname
));
7138 elf_tdata (abfd
)->core_command
7139 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7140 sizeof (psinfo
.pr_psargs
));
7146 /* Fail - we don't know how to handle any other
7147 note size (ie. data object type). */
7151 /* Note that for some reason, a spurious space is tacked
7152 onto the end of the args in some (at least one anyway)
7153 implementations, so strip it off if it exists. */
7156 char *command
= elf_tdata (abfd
)->core_command
;
7157 int n
= strlen (command
);
7159 if (0 < n
&& command
[n
- 1] == ' ')
7160 command
[n
- 1] = '\0';
7165 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7167 #if defined (HAVE_PSTATUS_T)
7169 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7171 if (note
->descsz
== sizeof (pstatus_t
)
7172 #if defined (HAVE_PXSTATUS_T)
7173 || note
->descsz
== sizeof (pxstatus_t
)
7179 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7181 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7183 #if defined (HAVE_PSTATUS32_T)
7184 else if (note
->descsz
== sizeof (pstatus32_t
))
7186 /* 64-bit host, 32-bit corefile */
7189 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7191 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7194 /* Could grab some more details from the "representative"
7195 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7196 NT_LWPSTATUS note, presumably. */
7200 #endif /* defined (HAVE_PSTATUS_T) */
7202 #if defined (HAVE_LWPSTATUS_T)
7204 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7206 lwpstatus_t lwpstat
;
7212 if (note
->descsz
!= sizeof (lwpstat
)
7213 #if defined (HAVE_LWPXSTATUS_T)
7214 && note
->descsz
!= sizeof (lwpxstatus_t
)
7219 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7221 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7222 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7224 /* Make a ".reg/999" section. */
7226 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7227 len
= strlen (buf
) + 1;
7228 name
= bfd_alloc (abfd
, len
);
7231 memcpy (name
, buf
, len
);
7233 sect
= bfd_make_section_anyway (abfd
, name
);
7237 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7238 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7239 sect
->filepos
= note
->descpos
7240 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7243 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7244 sect
->size
= sizeof (lwpstat
.pr_reg
);
7245 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7248 sect
->flags
= SEC_HAS_CONTENTS
;
7249 sect
->alignment_power
= 2;
7251 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7254 /* Make a ".reg2/999" section */
7256 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7257 len
= strlen (buf
) + 1;
7258 name
= bfd_alloc (abfd
, len
);
7261 memcpy (name
, buf
, len
);
7263 sect
= bfd_make_section_anyway (abfd
, name
);
7267 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7268 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7269 sect
->filepos
= note
->descpos
7270 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7273 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7274 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7275 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7278 sect
->flags
= SEC_HAS_CONTENTS
;
7279 sect
->alignment_power
= 2;
7281 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7283 #endif /* defined (HAVE_LWPSTATUS_T) */
7285 #if defined (HAVE_WIN32_PSTATUS_T)
7287 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7293 win32_pstatus_t pstatus
;
7295 if (note
->descsz
< sizeof (pstatus
))
7298 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7300 switch (pstatus
.data_type
)
7302 case NOTE_INFO_PROCESS
:
7303 /* FIXME: need to add ->core_command. */
7304 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7305 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7308 case NOTE_INFO_THREAD
:
7309 /* Make a ".reg/999" section. */
7310 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7312 len
= strlen (buf
) + 1;
7313 name
= bfd_alloc (abfd
, len
);
7317 memcpy (name
, buf
, len
);
7319 sect
= bfd_make_section_anyway (abfd
, name
);
7323 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7324 sect
->filepos
= (note
->descpos
7325 + offsetof (struct win32_pstatus
,
7326 data
.thread_info
.thread_context
));
7327 sect
->flags
= SEC_HAS_CONTENTS
;
7328 sect
->alignment_power
= 2;
7330 if (pstatus
.data
.thread_info
.is_active_thread
)
7331 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7335 case NOTE_INFO_MODULE
:
7336 /* Make a ".module/xxxxxxxx" section. */
7337 sprintf (buf
, ".module/%08lx",
7338 (long) pstatus
.data
.module_info
.base_address
);
7340 len
= strlen (buf
) + 1;
7341 name
= bfd_alloc (abfd
, len
);
7345 memcpy (name
, buf
, len
);
7347 sect
= bfd_make_section_anyway (abfd
, name
);
7352 sect
->size
= note
->descsz
;
7353 sect
->filepos
= note
->descpos
;
7354 sect
->flags
= SEC_HAS_CONTENTS
;
7355 sect
->alignment_power
= 2;
7364 #endif /* HAVE_WIN32_PSTATUS_T */
7367 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7369 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7377 if (bed
->elf_backend_grok_prstatus
)
7378 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7380 #if defined (HAVE_PRSTATUS_T)
7381 return elfcore_grok_prstatus (abfd
, note
);
7386 #if defined (HAVE_PSTATUS_T)
7388 return elfcore_grok_pstatus (abfd
, note
);
7391 #if defined (HAVE_LWPSTATUS_T)
7393 return elfcore_grok_lwpstatus (abfd
, note
);
7396 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7397 return elfcore_grok_prfpreg (abfd
, note
);
7399 #if defined (HAVE_WIN32_PSTATUS_T)
7400 case NT_WIN32PSTATUS
:
7401 return elfcore_grok_win32pstatus (abfd
, note
);
7404 case NT_PRXFPREG
: /* Linux SSE extension */
7405 if (note
->namesz
== 6
7406 && strcmp (note
->namedata
, "LINUX") == 0)
7407 return elfcore_grok_prxfpreg (abfd
, note
);
7413 if (bed
->elf_backend_grok_psinfo
)
7414 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7416 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7417 return elfcore_grok_psinfo (abfd
, note
);
7424 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7428 sect
->size
= note
->descsz
;
7429 sect
->filepos
= note
->descpos
;
7430 sect
->flags
= SEC_HAS_CONTENTS
;
7431 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7439 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7443 cp
= strchr (note
->namedata
, '@');
7446 *lwpidp
= atoi(cp
+ 1);
7453 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7456 /* Signal number at offset 0x08. */
7457 elf_tdata (abfd
)->core_signal
7458 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7460 /* Process ID at offset 0x50. */
7461 elf_tdata (abfd
)->core_pid
7462 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7464 /* Command name at 0x7c (max 32 bytes, including nul). */
7465 elf_tdata (abfd
)->core_command
7466 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7468 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7473 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7477 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7478 elf_tdata (abfd
)->core_lwpid
= lwp
;
7480 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7482 /* NetBSD-specific core "procinfo". Note that we expect to
7483 find this note before any of the others, which is fine,
7484 since the kernel writes this note out first when it
7485 creates a core file. */
7487 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7490 /* As of Jan 2002 there are no other machine-independent notes
7491 defined for NetBSD core files. If the note type is less
7492 than the start of the machine-dependent note types, we don't
7495 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7499 switch (bfd_get_arch (abfd
))
7501 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7502 PT_GETFPREGS == mach+2. */
7504 case bfd_arch_alpha
:
7505 case bfd_arch_sparc
:
7508 case NT_NETBSDCORE_FIRSTMACH
+0:
7509 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7511 case NT_NETBSDCORE_FIRSTMACH
+2:
7512 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7518 /* On all other arch's, PT_GETREGS == mach+1 and
7519 PT_GETFPREGS == mach+3. */
7524 case NT_NETBSDCORE_FIRSTMACH
+1:
7525 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7527 case NT_NETBSDCORE_FIRSTMACH
+3:
7528 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7538 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7540 void *ddata
= note
->descdata
;
7547 /* nto_procfs_status 'pid' field is at offset 0. */
7548 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7550 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7551 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7553 /* nto_procfs_status 'flags' field is at offset 8. */
7554 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7556 /* nto_procfs_status 'what' field is at offset 14. */
7557 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7559 elf_tdata (abfd
)->core_signal
= sig
;
7560 elf_tdata (abfd
)->core_lwpid
= *tid
;
7563 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7564 do not come from signals so we make sure we set the current
7565 thread just in case. */
7566 if (flags
& 0x00000080)
7567 elf_tdata (abfd
)->core_lwpid
= *tid
;
7569 /* Make a ".qnx_core_status/%d" section. */
7570 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7572 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7577 sect
= bfd_make_section_anyway (abfd
, name
);
7581 sect
->size
= note
->descsz
;
7582 sect
->filepos
= note
->descpos
;
7583 sect
->flags
= SEC_HAS_CONTENTS
;
7584 sect
->alignment_power
= 2;
7586 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7590 elfcore_grok_nto_regs (bfd
*abfd
,
7591 Elf_Internal_Note
*note
,
7599 /* Make a "(base)/%d" section. */
7600 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7602 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7607 sect
= bfd_make_section_anyway (abfd
, name
);
7611 sect
->size
= note
->descsz
;
7612 sect
->filepos
= note
->descpos
;
7613 sect
->flags
= SEC_HAS_CONTENTS
;
7614 sect
->alignment_power
= 2;
7616 /* This is the current thread. */
7617 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7618 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7623 #define BFD_QNT_CORE_INFO 7
7624 #define BFD_QNT_CORE_STATUS 8
7625 #define BFD_QNT_CORE_GREG 9
7626 #define BFD_QNT_CORE_FPREG 10
7629 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7631 /* Every GREG section has a STATUS section before it. Store the
7632 tid from the previous call to pass down to the next gregs
7634 static pid_t tid
= 1;
7638 case BFD_QNT_CORE_INFO
:
7639 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7640 case BFD_QNT_CORE_STATUS
:
7641 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7642 case BFD_QNT_CORE_GREG
:
7643 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7644 case BFD_QNT_CORE_FPREG
:
7645 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7651 /* Function: elfcore_write_note
7658 size of data for note
7661 End of buffer containing note. */
7664 elfcore_write_note (bfd
*abfd
,
7672 Elf_External_Note
*xnp
;
7682 const struct elf_backend_data
*bed
;
7684 namesz
= strlen (name
) + 1;
7685 bed
= get_elf_backend_data (abfd
);
7686 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7689 newspace
= 12 + namesz
+ pad
+ size
;
7691 p
= realloc (buf
, *bufsiz
+ newspace
);
7693 *bufsiz
+= newspace
;
7694 xnp
= (Elf_External_Note
*) dest
;
7695 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7696 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7697 H_PUT_32 (abfd
, type
, xnp
->type
);
7701 memcpy (dest
, name
, namesz
);
7709 memcpy (dest
, input
, size
);
7713 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7715 elfcore_write_prpsinfo (bfd
*abfd
,
7722 char *note_name
= "CORE";
7724 #if defined (HAVE_PSINFO_T)
7726 note_type
= NT_PSINFO
;
7729 note_type
= NT_PRPSINFO
;
7732 memset (&data
, 0, sizeof (data
));
7733 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7734 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7735 return elfcore_write_note (abfd
, buf
, bufsiz
,
7736 note_name
, note_type
, &data
, sizeof (data
));
7738 #endif /* PSINFO_T or PRPSINFO_T */
7740 #if defined (HAVE_PRSTATUS_T)
7742 elfcore_write_prstatus (bfd
*abfd
,
7750 char *note_name
= "CORE";
7752 memset (&prstat
, 0, sizeof (prstat
));
7753 prstat
.pr_pid
= pid
;
7754 prstat
.pr_cursig
= cursig
;
7755 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7756 return elfcore_write_note (abfd
, buf
, bufsiz
,
7757 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7759 #endif /* HAVE_PRSTATUS_T */
7761 #if defined (HAVE_LWPSTATUS_T)
7763 elfcore_write_lwpstatus (bfd
*abfd
,
7770 lwpstatus_t lwpstat
;
7771 char *note_name
= "CORE";
7773 memset (&lwpstat
, 0, sizeof (lwpstat
));
7774 lwpstat
.pr_lwpid
= pid
>> 16;
7775 lwpstat
.pr_cursig
= cursig
;
7776 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7777 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7778 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7780 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7781 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7783 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7784 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7787 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7788 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7790 #endif /* HAVE_LWPSTATUS_T */
7792 #if defined (HAVE_PSTATUS_T)
7794 elfcore_write_pstatus (bfd
*abfd
,
7802 char *note_name
= "CORE";
7804 memset (&pstat
, 0, sizeof (pstat
));
7805 pstat
.pr_pid
= pid
& 0xffff;
7806 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7807 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7810 #endif /* HAVE_PSTATUS_T */
7813 elfcore_write_prfpreg (bfd
*abfd
,
7819 char *note_name
= "CORE";
7820 return elfcore_write_note (abfd
, buf
, bufsiz
,
7821 note_name
, NT_FPREGSET
, fpregs
, size
);
7825 elfcore_write_prxfpreg (bfd
*abfd
,
7828 const void *xfpregs
,
7831 char *note_name
= "LINUX";
7832 return elfcore_write_note (abfd
, buf
, bufsiz
,
7833 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7837 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7845 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7848 buf
= bfd_malloc (size
);
7852 if (bfd_bread (buf
, size
, abfd
) != size
)
7860 while (p
< buf
+ size
)
7862 /* FIXME: bad alignment assumption. */
7863 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7864 Elf_Internal_Note in
;
7866 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7868 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7869 in
.namedata
= xnp
->name
;
7871 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7872 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7873 in
.descpos
= offset
+ (in
.descdata
- buf
);
7875 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7877 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7880 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7882 if (! elfcore_grok_nto_note (abfd
, &in
))
7887 if (! elfcore_grok_note (abfd
, &in
))
7891 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7898 /* Providing external access to the ELF program header table. */
7900 /* Return an upper bound on the number of bytes required to store a
7901 copy of ABFD's program header table entries. Return -1 if an error
7902 occurs; bfd_get_error will return an appropriate code. */
7905 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7907 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7909 bfd_set_error (bfd_error_wrong_format
);
7913 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7916 /* Copy ABFD's program header table entries to *PHDRS. The entries
7917 will be stored as an array of Elf_Internal_Phdr structures, as
7918 defined in include/elf/internal.h. To find out how large the
7919 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7921 Return the number of program header table entries read, or -1 if an
7922 error occurs; bfd_get_error will return an appropriate code. */
7925 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7929 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7931 bfd_set_error (bfd_error_wrong_format
);
7935 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7936 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7937 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7943 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7946 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7948 i_ehdrp
= elf_elfheader (abfd
);
7949 if (i_ehdrp
== NULL
)
7950 sprintf_vma (buf
, value
);
7953 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7955 #if BFD_HOST_64BIT_LONG
7956 sprintf (buf
, "%016lx", value
);
7958 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7959 _bfd_int64_low (value
));
7963 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7966 sprintf_vma (buf
, value
);
7971 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7974 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7976 i_ehdrp
= elf_elfheader (abfd
);
7977 if (i_ehdrp
== NULL
)
7978 fprintf_vma ((FILE *) stream
, value
);
7981 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7983 #if BFD_HOST_64BIT_LONG
7984 fprintf ((FILE *) stream
, "%016lx", value
);
7986 fprintf ((FILE *) stream
, "%08lx%08lx",
7987 _bfd_int64_high (value
), _bfd_int64_low (value
));
7991 fprintf ((FILE *) stream
, "%08lx",
7992 (unsigned long) (value
& 0xffffffff));
7995 fprintf_vma ((FILE *) stream
, value
);
7999 enum elf_reloc_type_class
8000 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
8002 return reloc_class_normal
;
8005 /* For RELA architectures, return the relocation value for a
8006 relocation against a local symbol. */
8009 _bfd_elf_rela_local_sym (bfd
*abfd
,
8010 Elf_Internal_Sym
*sym
,
8012 Elf_Internal_Rela
*rel
)
8014 asection
*sec
= *psec
;
8017 relocation
= (sec
->output_section
->vma
8018 + sec
->output_offset
8020 if ((sec
->flags
& SEC_MERGE
)
8021 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
8022 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
8025 _bfd_merged_section_offset (abfd
, psec
,
8026 elf_section_data (sec
)->sec_info
,
8027 sym
->st_value
+ rel
->r_addend
);
8030 /* If we have changed the section, and our original section is
8031 marked with SEC_EXCLUDE, it means that the original
8032 SEC_MERGE section has been completely subsumed in some
8033 other SEC_MERGE section. In this case, we need to leave
8034 some info around for --emit-relocs. */
8035 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
8036 sec
->kept_section
= *psec
;
8039 rel
->r_addend
-= relocation
;
8040 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
8046 _bfd_elf_rel_local_sym (bfd
*abfd
,
8047 Elf_Internal_Sym
*sym
,
8051 asection
*sec
= *psec
;
8053 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
8054 return sym
->st_value
+ addend
;
8056 return _bfd_merged_section_offset (abfd
, psec
,
8057 elf_section_data (sec
)->sec_info
,
8058 sym
->st_value
+ addend
);
8062 _bfd_elf_section_offset (bfd
*abfd
,
8063 struct bfd_link_info
*info
,
8067 switch (sec
->sec_info_type
)
8069 case ELF_INFO_TYPE_STABS
:
8070 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8072 case ELF_INFO_TYPE_EH_FRAME
:
8073 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8079 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8080 reconstruct an ELF file by reading the segments out of remote memory
8081 based on the ELF file header at EHDR_VMA and the ELF program headers it
8082 points to. If not null, *LOADBASEP is filled in with the difference
8083 between the VMAs from which the segments were read, and the VMAs the
8084 file headers (and hence BFD's idea of each section's VMA) put them at.
8086 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8087 remote memory at target address VMA into the local buffer at MYADDR; it
8088 should return zero on success or an `errno' code on failure. TEMPL must
8089 be a BFD for an ELF target with the word size and byte order found in
8090 the remote memory. */
8093 bfd_elf_bfd_from_remote_memory
8097 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8099 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8100 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8104 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8105 long symcount ATTRIBUTE_UNUSED
,
8106 asymbol
**syms ATTRIBUTE_UNUSED
,
8111 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8114 const char *relplt_name
;
8115 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8119 Elf_Internal_Shdr
*hdr
;
8125 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8128 if (dynsymcount
<= 0)
8131 if (!bed
->plt_sym_val
)
8134 relplt_name
= bed
->relplt_name
;
8135 if (relplt_name
== NULL
)
8136 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8137 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8141 hdr
= &elf_section_data (relplt
)->this_hdr
;
8142 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8143 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8146 plt
= bfd_get_section_by_name (abfd
, ".plt");
8150 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8151 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8154 count
= relplt
->size
/ hdr
->sh_entsize
;
8155 size
= count
* sizeof (asymbol
);
8156 p
= relplt
->relocation
;
8157 for (i
= 0; i
< count
; i
++, s
++, p
++)
8158 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8160 s
= *ret
= bfd_malloc (size
);
8164 names
= (char *) (s
+ count
);
8165 p
= relplt
->relocation
;
8167 for (i
= 0; i
< count
; i
++, s
++, p
++)
8172 addr
= bed
->plt_sym_val (i
, plt
, p
);
8173 if (addr
== (bfd_vma
) -1)
8176 *s
= **p
->sym_ptr_ptr
;
8178 s
->value
= addr
- plt
->vma
;
8180 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8181 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8183 memcpy (names
, "@plt", sizeof ("@plt"));
8184 names
+= sizeof ("@plt");
8191 /* Sort symbol by binding and section. We want to put definitions
8192 sorted by section at the beginning. */
8195 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8197 const Elf_Internal_Sym
*s1
;
8198 const Elf_Internal_Sym
*s2
;
8201 /* Make sure that undefined symbols are at the end. */
8202 s1
= (const Elf_Internal_Sym
*) arg1
;
8203 if (s1
->st_shndx
== SHN_UNDEF
)
8205 s2
= (const Elf_Internal_Sym
*) arg2
;
8206 if (s2
->st_shndx
== SHN_UNDEF
)
8209 /* Sorted by section index. */
8210 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8214 /* Sorted by binding. */
8215 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8220 Elf_Internal_Sym
*sym
;
8225 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8227 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8228 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8229 return strcmp (s1
->name
, s2
->name
);
8232 /* Check if 2 sections define the same set of local and global
8236 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8239 const struct elf_backend_data
*bed1
, *bed2
;
8240 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8241 bfd_size_type symcount1
, symcount2
;
8242 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8243 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8244 Elf_Internal_Sym
*isymend
;
8245 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8246 bfd_size_type count1
, count2
, i
;
8253 /* If both are .gnu.linkonce sections, they have to have the same
8255 if (strncmp (sec1
->name
, ".gnu.linkonce",
8256 sizeof ".gnu.linkonce" - 1) == 0
8257 && strncmp (sec2
->name
, ".gnu.linkonce",
8258 sizeof ".gnu.linkonce" - 1) == 0)
8259 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8260 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8262 /* Both sections have to be in ELF. */
8263 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8264 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8267 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8270 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8271 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8273 /* If both are members of section groups, they have to have the
8275 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8279 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8280 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8281 if (shndx1
== -1 || shndx2
== -1)
8284 bed1
= get_elf_backend_data (bfd1
);
8285 bed2
= get_elf_backend_data (bfd2
);
8286 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8287 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8288 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8289 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8291 if (symcount1
== 0 || symcount2
== 0)
8294 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8296 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8300 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8303 /* Sort symbols by binding and section. Global definitions are at
8305 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8306 elf_sort_elf_symbol
);
8307 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8308 elf_sort_elf_symbol
);
8310 /* Count definitions in the section. */
8312 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8313 isym
< isymend
; isym
++)
8315 if (isym
->st_shndx
== (unsigned int) shndx1
)
8322 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8327 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8328 isym
< isymend
; isym
++)
8330 if (isym
->st_shndx
== (unsigned int) shndx2
)
8337 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8341 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8344 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8345 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8347 if (symtable1
== NULL
|| symtable2
== NULL
)
8351 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8352 isym
< isymend
; isym
++)
8355 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8362 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8363 isym
< isymend
; isym
++)
8366 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8372 /* Sort symbol by name. */
8373 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8374 elf_sym_name_compare
);
8375 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8376 elf_sym_name_compare
);
8378 for (i
= 0; i
< count1
; i
++)
8379 /* Two symbols must have the same binding, type and name. */
8380 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8381 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8382 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)