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. */
456 if (! bfd_section_from_shdr (abfd
, ghdr
->sh_link
))
459 /* Go read the symbol. */
460 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
461 if (bfd_elf_get_elf_syms (abfd
, hdr
, 1, ghdr
->sh_info
,
462 &isym
, esym
, &eshndx
) == NULL
)
465 return bfd_elf_sym_name (abfd
, hdr
, &isym
, NULL
);
468 /* Set next_in_group list pointer, and group name for NEWSECT. */
471 setup_group (bfd
*abfd
, Elf_Internal_Shdr
*hdr
, asection
*newsect
)
473 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
475 /* If num_group is zero, read in all SHT_GROUP sections. The count
476 is set to -1 if there are no SHT_GROUP sections. */
479 unsigned int i
, shnum
;
481 /* First count the number of groups. If we have a SHT_GROUP
482 section with just a flag word (ie. sh_size is 4), ignore it. */
483 shnum
= elf_numsections (abfd
);
485 for (i
= 0; i
< shnum
; i
++)
487 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
488 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
494 num_group
= (unsigned) -1;
495 elf_tdata (abfd
)->num_group
= num_group
;
499 /* We keep a list of elf section headers for group sections,
500 so we can find them quickly. */
503 elf_tdata (abfd
)->num_group
= num_group
;
504 amt
= num_group
* sizeof (Elf_Internal_Shdr
*);
505 elf_tdata (abfd
)->group_sect_ptr
= bfd_alloc (abfd
, amt
);
506 if (elf_tdata (abfd
)->group_sect_ptr
== NULL
)
510 for (i
= 0; i
< shnum
; i
++)
512 Elf_Internal_Shdr
*shdr
= elf_elfsections (abfd
)[i
];
513 if (shdr
->sh_type
== SHT_GROUP
&& shdr
->sh_size
>= 8)
516 Elf_Internal_Group
*dest
;
518 /* Add to list of sections. */
519 elf_tdata (abfd
)->group_sect_ptr
[num_group
] = shdr
;
522 /* Read the raw contents. */
523 BFD_ASSERT (sizeof (*dest
) >= 4);
524 amt
= shdr
->sh_size
* sizeof (*dest
) / 4;
525 shdr
->contents
= bfd_alloc (abfd
, amt
);
526 if (shdr
->contents
== NULL
527 || bfd_seek (abfd
, shdr
->sh_offset
, SEEK_SET
) != 0
528 || (bfd_bread (shdr
->contents
, shdr
->sh_size
, abfd
)
532 /* Translate raw contents, a flag word followed by an
533 array of elf section indices all in target byte order,
534 to the flag word followed by an array of elf section
536 src
= shdr
->contents
+ shdr
->sh_size
;
537 dest
= (Elf_Internal_Group
*) (shdr
->contents
+ amt
);
544 idx
= H_GET_32 (abfd
, src
);
545 if (src
== shdr
->contents
)
548 if (shdr
->bfd_section
!= NULL
&& (idx
& GRP_COMDAT
))
549 shdr
->bfd_section
->flags
550 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
555 ((*_bfd_error_handler
)
556 (_("%B: invalid SHT_GROUP entry"), abfd
));
559 dest
->shdr
= elf_elfsections (abfd
)[idx
];
566 if (num_group
!= (unsigned) -1)
570 for (i
= 0; i
< num_group
; i
++)
572 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
573 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
574 unsigned int n_elt
= shdr
->sh_size
/ 4;
576 /* Look through this group's sections to see if current
577 section is a member. */
579 if ((++idx
)->shdr
== hdr
)
583 /* We are a member of this group. Go looking through
584 other members to see if any others are linked via
586 idx
= (Elf_Internal_Group
*) shdr
->contents
;
587 n_elt
= shdr
->sh_size
/ 4;
589 if ((s
= (++idx
)->shdr
->bfd_section
) != NULL
590 && elf_next_in_group (s
) != NULL
)
594 /* Snarf the group name from other member, and
595 insert current section in circular list. */
596 elf_group_name (newsect
) = elf_group_name (s
);
597 elf_next_in_group (newsect
) = elf_next_in_group (s
);
598 elf_next_in_group (s
) = newsect
;
604 gname
= group_signature (abfd
, shdr
);
607 elf_group_name (newsect
) = gname
;
609 /* Start a circular list with one element. */
610 elf_next_in_group (newsect
) = newsect
;
613 /* If the group section has been created, point to the
615 if (shdr
->bfd_section
!= NULL
)
616 elf_next_in_group (shdr
->bfd_section
) = newsect
;
624 if (elf_group_name (newsect
) == NULL
)
626 (*_bfd_error_handler
) (_("%B: no group info for section %A"),
633 _bfd_elf_setup_group_pointers (bfd
*abfd
)
636 unsigned int num_group
= elf_tdata (abfd
)->num_group
;
637 bfd_boolean result
= TRUE
;
639 if (num_group
== (unsigned) -1)
642 for (i
= 0; i
< num_group
; i
++)
644 Elf_Internal_Shdr
*shdr
= elf_tdata (abfd
)->group_sect_ptr
[i
];
645 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) shdr
->contents
;
646 unsigned int n_elt
= shdr
->sh_size
/ 4;
649 if ((++idx
)->shdr
->bfd_section
)
650 elf_sec_group (idx
->shdr
->bfd_section
) = shdr
->bfd_section
;
651 else if (idx
->shdr
->sh_type
== SHT_RELA
652 || idx
->shdr
->sh_type
== SHT_REL
)
653 /* We won't include relocation sections in section groups in
654 output object files. We adjust the group section size here
655 so that relocatable link will work correctly when
656 relocation sections are in section group in input object
658 shdr
->bfd_section
->size
-= 4;
661 /* There are some unknown sections in the group. */
662 (*_bfd_error_handler
)
663 (_("%B: unknown [%d] section `%s' in group [%s]"),
665 (unsigned int) idx
->shdr
->sh_type
,
666 bfd_elf_string_from_elf_section (abfd
,
667 (elf_elfheader (abfd
)
670 shdr
->bfd_section
->name
);
678 bfd_elf_is_group_section (bfd
*abfd ATTRIBUTE_UNUSED
, const asection
*sec
)
680 return elf_next_in_group (sec
) != NULL
;
683 /* Make a BFD section from an ELF section. We store a pointer to the
684 BFD section in the bfd_section field of the header. */
687 _bfd_elf_make_section_from_shdr (bfd
*abfd
,
688 Elf_Internal_Shdr
*hdr
,
694 const struct elf_backend_data
*bed
;
696 if (hdr
->bfd_section
!= NULL
)
698 BFD_ASSERT (strcmp (name
,
699 bfd_get_section_name (abfd
, hdr
->bfd_section
)) == 0);
703 newsect
= bfd_make_section_anyway (abfd
, name
);
707 hdr
->bfd_section
= newsect
;
708 elf_section_data (newsect
)->this_hdr
= *hdr
;
709 elf_section_data (newsect
)->this_idx
= shindex
;
711 /* Always use the real type/flags. */
712 elf_section_type (newsect
) = hdr
->sh_type
;
713 elf_section_flags (newsect
) = hdr
->sh_flags
;
715 newsect
->filepos
= hdr
->sh_offset
;
717 if (! bfd_set_section_vma (abfd
, newsect
, hdr
->sh_addr
)
718 || ! bfd_set_section_size (abfd
, newsect
, hdr
->sh_size
)
719 || ! bfd_set_section_alignment (abfd
, newsect
,
720 bfd_log2 ((bfd_vma
) hdr
->sh_addralign
)))
723 flags
= SEC_NO_FLAGS
;
724 if (hdr
->sh_type
!= SHT_NOBITS
)
725 flags
|= SEC_HAS_CONTENTS
;
726 if (hdr
->sh_type
== SHT_GROUP
)
727 flags
|= SEC_GROUP
| SEC_EXCLUDE
;
728 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
731 if (hdr
->sh_type
!= SHT_NOBITS
)
734 if ((hdr
->sh_flags
& SHF_WRITE
) == 0)
735 flags
|= SEC_READONLY
;
736 if ((hdr
->sh_flags
& SHF_EXECINSTR
) != 0)
738 else if ((flags
& SEC_LOAD
) != 0)
740 if ((hdr
->sh_flags
& SHF_MERGE
) != 0)
743 newsect
->entsize
= hdr
->sh_entsize
;
744 if ((hdr
->sh_flags
& SHF_STRINGS
) != 0)
745 flags
|= SEC_STRINGS
;
747 if (hdr
->sh_flags
& SHF_GROUP
)
748 if (!setup_group (abfd
, hdr
, newsect
))
750 if ((hdr
->sh_flags
& SHF_TLS
) != 0)
751 flags
|= SEC_THREAD_LOCAL
;
753 /* The debugging sections appear to be recognized only by name, not
756 static const char *debug_sec_names
[] =
765 for (i
= ARRAY_SIZE (debug_sec_names
); i
--;)
766 if (strncmp (name
, debug_sec_names
[i
], strlen (debug_sec_names
[i
])) == 0)
770 flags
|= SEC_DEBUGGING
;
773 /* As a GNU extension, if the name begins with .gnu.linkonce, we
774 only link a single copy of the section. This is used to support
775 g++. g++ will emit each template expansion in its own section.
776 The symbols will be defined as weak, so that multiple definitions
777 are permitted. The GNU linker extension is to actually discard
778 all but one of the sections. */
779 if (strncmp (name
, ".gnu.linkonce", sizeof ".gnu.linkonce" - 1) == 0
780 && elf_next_in_group (newsect
) == NULL
)
781 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
783 bed
= get_elf_backend_data (abfd
);
784 if (bed
->elf_backend_section_flags
)
785 if (! bed
->elf_backend_section_flags (&flags
, hdr
))
788 if (! bfd_set_section_flags (abfd
, newsect
, flags
))
791 if ((flags
& SEC_ALLOC
) != 0)
793 Elf_Internal_Phdr
*phdr
;
796 /* Look through the phdrs to see if we need to adjust the lma.
797 If all the p_paddr fields are zero, we ignore them, since
798 some ELF linkers produce such output. */
799 phdr
= elf_tdata (abfd
)->phdr
;
800 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
802 if (phdr
->p_paddr
!= 0)
805 if (i
< elf_elfheader (abfd
)->e_phnum
)
807 phdr
= elf_tdata (abfd
)->phdr
;
808 for (i
= 0; i
< elf_elfheader (abfd
)->e_phnum
; i
++, phdr
++)
810 /* This section is part of this segment if its file
811 offset plus size lies within the segment's memory
812 span and, if the section is loaded, the extent of the
813 loaded data lies within the extent of the segment.
815 Note - we used to check the p_paddr field as well, and
816 refuse to set the LMA if it was 0. This is wrong
817 though, as a perfectly valid initialised segment can
818 have a p_paddr of zero. Some architectures, eg ARM,
819 place special significance on the address 0 and
820 executables need to be able to have a segment which
821 covers this address. */
822 if (phdr
->p_type
== PT_LOAD
823 && (bfd_vma
) hdr
->sh_offset
>= phdr
->p_offset
824 && (hdr
->sh_offset
+ hdr
->sh_size
825 <= phdr
->p_offset
+ phdr
->p_memsz
)
826 && ((flags
& SEC_LOAD
) == 0
827 || (hdr
->sh_offset
+ hdr
->sh_size
828 <= phdr
->p_offset
+ phdr
->p_filesz
)))
830 if ((flags
& SEC_LOAD
) == 0)
831 newsect
->lma
= (phdr
->p_paddr
832 + hdr
->sh_addr
- phdr
->p_vaddr
);
834 /* We used to use the same adjustment for SEC_LOAD
835 sections, but that doesn't work if the segment
836 is packed with code from multiple VMAs.
837 Instead we calculate the section LMA based on
838 the segment LMA. It is assumed that the
839 segment will contain sections with contiguous
840 LMAs, even if the VMAs are not. */
841 newsect
->lma
= (phdr
->p_paddr
842 + hdr
->sh_offset
- phdr
->p_offset
);
844 /* With contiguous segments, we can't tell from file
845 offsets whether a section with zero size should
846 be placed at the end of one segment or the
847 beginning of the next. Decide based on vaddr. */
848 if (hdr
->sh_addr
>= phdr
->p_vaddr
849 && (hdr
->sh_addr
+ hdr
->sh_size
850 <= phdr
->p_vaddr
+ phdr
->p_memsz
))
865 struct elf_internal_shdr *bfd_elf_find_section (bfd *abfd, char *name);
868 Helper functions for GDB to locate the string tables.
869 Since BFD hides string tables from callers, GDB needs to use an
870 internal hook to find them. Sun's .stabstr, in particular,
871 isn't even pointed to by the .stab section, so ordinary
872 mechanisms wouldn't work to find it, even if we had some.
875 struct elf_internal_shdr
*
876 bfd_elf_find_section (bfd
*abfd
, char *name
)
878 Elf_Internal_Shdr
**i_shdrp
;
883 i_shdrp
= elf_elfsections (abfd
);
886 shstrtab
= bfd_elf_get_str_section (abfd
,
887 elf_elfheader (abfd
)->e_shstrndx
);
888 if (shstrtab
!= NULL
)
890 max
= elf_numsections (abfd
);
891 for (i
= 1; i
< max
; i
++)
892 if (!strcmp (&shstrtab
[i_shdrp
[i
]->sh_name
], name
))
899 const char *const bfd_elf_section_type_names
[] = {
900 "SHT_NULL", "SHT_PROGBITS", "SHT_SYMTAB", "SHT_STRTAB",
901 "SHT_RELA", "SHT_HASH", "SHT_DYNAMIC", "SHT_NOTE",
902 "SHT_NOBITS", "SHT_REL", "SHT_SHLIB", "SHT_DYNSYM",
905 /* ELF relocs are against symbols. If we are producing relocatable
906 output, and the reloc is against an external symbol, and nothing
907 has given us any additional addend, the resulting reloc will also
908 be against the same symbol. In such a case, we don't want to
909 change anything about the way the reloc is handled, since it will
910 all be done at final link time. Rather than put special case code
911 into bfd_perform_relocation, all the reloc types use this howto
912 function. It just short circuits the reloc if producing
913 relocatable output against an external symbol. */
915 bfd_reloc_status_type
916 bfd_elf_generic_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
917 arelent
*reloc_entry
,
919 void *data ATTRIBUTE_UNUSED
,
920 asection
*input_section
,
922 char **error_message ATTRIBUTE_UNUSED
)
924 if (output_bfd
!= NULL
925 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
926 && (! reloc_entry
->howto
->partial_inplace
927 || reloc_entry
->addend
== 0))
929 reloc_entry
->address
+= input_section
->output_offset
;
933 return bfd_reloc_continue
;
936 /* Make sure sec_info_type is cleared if sec_info is cleared too. */
939 merge_sections_remove_hook (bfd
*abfd ATTRIBUTE_UNUSED
,
942 BFD_ASSERT (sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
);
943 sec
->sec_info_type
= ELF_INFO_TYPE_NONE
;
946 /* Finish SHF_MERGE section merging. */
949 _bfd_elf_merge_sections (bfd
*abfd
, struct bfd_link_info
*info
)
954 if (!is_elf_hash_table (info
->hash
))
957 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
958 if ((ibfd
->flags
& DYNAMIC
) == 0)
959 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
960 if ((sec
->flags
& SEC_MERGE
) != 0
961 && !bfd_is_abs_section (sec
->output_section
))
963 struct bfd_elf_section_data
*secdata
;
965 secdata
= elf_section_data (sec
);
966 if (! _bfd_add_merge_section (abfd
,
967 &elf_hash_table (info
)->merge_info
,
968 sec
, &secdata
->sec_info
))
970 else if (secdata
->sec_info
)
971 sec
->sec_info_type
= ELF_INFO_TYPE_MERGE
;
974 if (elf_hash_table (info
)->merge_info
!= NULL
)
975 _bfd_merge_sections (abfd
, info
, elf_hash_table (info
)->merge_info
,
976 merge_sections_remove_hook
);
981 _bfd_elf_link_just_syms (asection
*sec
, struct bfd_link_info
*info
)
983 sec
->output_section
= bfd_abs_section_ptr
;
984 sec
->output_offset
= sec
->vma
;
985 if (!is_elf_hash_table (info
->hash
))
988 sec
->sec_info_type
= ELF_INFO_TYPE_JUST_SYMS
;
991 /* Copy the program header and other data from one object module to
995 _bfd_elf_copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
997 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
998 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
1001 BFD_ASSERT (!elf_flags_init (obfd
)
1002 || (elf_elfheader (obfd
)->e_flags
1003 == elf_elfheader (ibfd
)->e_flags
));
1005 elf_gp (obfd
) = elf_gp (ibfd
);
1006 elf_elfheader (obfd
)->e_flags
= elf_elfheader (ibfd
)->e_flags
;
1007 elf_flags_init (obfd
) = TRUE
;
1011 /* Print out the program headers. */
1014 _bfd_elf_print_private_bfd_data (bfd
*abfd
, void *farg
)
1017 Elf_Internal_Phdr
*p
;
1019 bfd_byte
*dynbuf
= NULL
;
1021 p
= elf_tdata (abfd
)->phdr
;
1026 fprintf (f
, _("\nProgram Header:\n"));
1027 c
= elf_elfheader (abfd
)->e_phnum
;
1028 for (i
= 0; i
< c
; i
++, p
++)
1035 case PT_NULL
: pt
= "NULL"; break;
1036 case PT_LOAD
: pt
= "LOAD"; break;
1037 case PT_DYNAMIC
: pt
= "DYNAMIC"; break;
1038 case PT_INTERP
: pt
= "INTERP"; break;
1039 case PT_NOTE
: pt
= "NOTE"; break;
1040 case PT_SHLIB
: pt
= "SHLIB"; break;
1041 case PT_PHDR
: pt
= "PHDR"; break;
1042 case PT_TLS
: pt
= "TLS"; break;
1043 case PT_GNU_EH_FRAME
: pt
= "EH_FRAME"; break;
1044 case PT_GNU_STACK
: pt
= "STACK"; break;
1045 case PT_GNU_RELRO
: pt
= "RELRO"; break;
1046 default: sprintf (buf
, "0x%lx", p
->p_type
); pt
= buf
; break;
1048 fprintf (f
, "%8s off 0x", pt
);
1049 bfd_fprintf_vma (abfd
, f
, p
->p_offset
);
1050 fprintf (f
, " vaddr 0x");
1051 bfd_fprintf_vma (abfd
, f
, p
->p_vaddr
);
1052 fprintf (f
, " paddr 0x");
1053 bfd_fprintf_vma (abfd
, f
, p
->p_paddr
);
1054 fprintf (f
, " align 2**%u\n", bfd_log2 (p
->p_align
));
1055 fprintf (f
, " filesz 0x");
1056 bfd_fprintf_vma (abfd
, f
, p
->p_filesz
);
1057 fprintf (f
, " memsz 0x");
1058 bfd_fprintf_vma (abfd
, f
, p
->p_memsz
);
1059 fprintf (f
, " flags %c%c%c",
1060 (p
->p_flags
& PF_R
) != 0 ? 'r' : '-',
1061 (p
->p_flags
& PF_W
) != 0 ? 'w' : '-',
1062 (p
->p_flags
& PF_X
) != 0 ? 'x' : '-');
1063 if ((p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
)) != 0)
1064 fprintf (f
, " %lx", p
->p_flags
&~ (unsigned) (PF_R
| PF_W
| PF_X
));
1069 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1073 unsigned long shlink
;
1074 bfd_byte
*extdyn
, *extdynend
;
1076 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1078 fprintf (f
, _("\nDynamic Section:\n"));
1080 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1083 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1086 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1088 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1089 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1092 extdynend
= extdyn
+ s
->size
;
1093 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1095 Elf_Internal_Dyn dyn
;
1098 bfd_boolean stringp
;
1100 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1102 if (dyn
.d_tag
== DT_NULL
)
1109 sprintf (ab
, "0x%lx", (unsigned long) dyn
.d_tag
);
1113 case DT_NEEDED
: name
= "NEEDED"; stringp
= TRUE
; break;
1114 case DT_PLTRELSZ
: name
= "PLTRELSZ"; break;
1115 case DT_PLTGOT
: name
= "PLTGOT"; break;
1116 case DT_HASH
: name
= "HASH"; break;
1117 case DT_STRTAB
: name
= "STRTAB"; break;
1118 case DT_SYMTAB
: name
= "SYMTAB"; break;
1119 case DT_RELA
: name
= "RELA"; break;
1120 case DT_RELASZ
: name
= "RELASZ"; break;
1121 case DT_RELAENT
: name
= "RELAENT"; break;
1122 case DT_STRSZ
: name
= "STRSZ"; break;
1123 case DT_SYMENT
: name
= "SYMENT"; break;
1124 case DT_INIT
: name
= "INIT"; break;
1125 case DT_FINI
: name
= "FINI"; break;
1126 case DT_SONAME
: name
= "SONAME"; stringp
= TRUE
; break;
1127 case DT_RPATH
: name
= "RPATH"; stringp
= TRUE
; break;
1128 case DT_SYMBOLIC
: name
= "SYMBOLIC"; break;
1129 case DT_REL
: name
= "REL"; break;
1130 case DT_RELSZ
: name
= "RELSZ"; break;
1131 case DT_RELENT
: name
= "RELENT"; break;
1132 case DT_PLTREL
: name
= "PLTREL"; break;
1133 case DT_DEBUG
: name
= "DEBUG"; break;
1134 case DT_TEXTREL
: name
= "TEXTREL"; break;
1135 case DT_JMPREL
: name
= "JMPREL"; break;
1136 case DT_BIND_NOW
: name
= "BIND_NOW"; break;
1137 case DT_INIT_ARRAY
: name
= "INIT_ARRAY"; break;
1138 case DT_FINI_ARRAY
: name
= "FINI_ARRAY"; break;
1139 case DT_INIT_ARRAYSZ
: name
= "INIT_ARRAYSZ"; break;
1140 case DT_FINI_ARRAYSZ
: name
= "FINI_ARRAYSZ"; break;
1141 case DT_RUNPATH
: name
= "RUNPATH"; stringp
= TRUE
; break;
1142 case DT_FLAGS
: name
= "FLAGS"; break;
1143 case DT_PREINIT_ARRAY
: name
= "PREINIT_ARRAY"; break;
1144 case DT_PREINIT_ARRAYSZ
: name
= "PREINIT_ARRAYSZ"; break;
1145 case DT_CHECKSUM
: name
= "CHECKSUM"; break;
1146 case DT_PLTPADSZ
: name
= "PLTPADSZ"; break;
1147 case DT_MOVEENT
: name
= "MOVEENT"; break;
1148 case DT_MOVESZ
: name
= "MOVESZ"; break;
1149 case DT_FEATURE
: name
= "FEATURE"; break;
1150 case DT_POSFLAG_1
: name
= "POSFLAG_1"; break;
1151 case DT_SYMINSZ
: name
= "SYMINSZ"; break;
1152 case DT_SYMINENT
: name
= "SYMINENT"; break;
1153 case DT_CONFIG
: name
= "CONFIG"; stringp
= TRUE
; break;
1154 case DT_DEPAUDIT
: name
= "DEPAUDIT"; stringp
= TRUE
; break;
1155 case DT_AUDIT
: name
= "AUDIT"; stringp
= TRUE
; break;
1156 case DT_PLTPAD
: name
= "PLTPAD"; break;
1157 case DT_MOVETAB
: name
= "MOVETAB"; break;
1158 case DT_SYMINFO
: name
= "SYMINFO"; break;
1159 case DT_RELACOUNT
: name
= "RELACOUNT"; break;
1160 case DT_RELCOUNT
: name
= "RELCOUNT"; break;
1161 case DT_FLAGS_1
: name
= "FLAGS_1"; break;
1162 case DT_VERSYM
: name
= "VERSYM"; break;
1163 case DT_VERDEF
: name
= "VERDEF"; break;
1164 case DT_VERDEFNUM
: name
= "VERDEFNUM"; break;
1165 case DT_VERNEED
: name
= "VERNEED"; break;
1166 case DT_VERNEEDNUM
: name
= "VERNEEDNUM"; break;
1167 case DT_AUXILIARY
: name
= "AUXILIARY"; stringp
= TRUE
; break;
1168 case DT_USED
: name
= "USED"; break;
1169 case DT_FILTER
: name
= "FILTER"; stringp
= TRUE
; break;
1172 fprintf (f
, " %-11s ", name
);
1174 fprintf (f
, "0x%lx", (unsigned long) dyn
.d_un
.d_val
);
1178 unsigned int tagv
= dyn
.d_un
.d_val
;
1180 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1183 fprintf (f
, "%s", string
);
1192 if ((elf_dynverdef (abfd
) != 0 && elf_tdata (abfd
)->verdef
== NULL
)
1193 || (elf_dynverref (abfd
) != 0 && elf_tdata (abfd
)->verref
== NULL
))
1195 if (! _bfd_elf_slurp_version_tables (abfd
, FALSE
))
1199 if (elf_dynverdef (abfd
) != 0)
1201 Elf_Internal_Verdef
*t
;
1203 fprintf (f
, _("\nVersion definitions:\n"));
1204 for (t
= elf_tdata (abfd
)->verdef
; t
!= NULL
; t
= t
->vd_nextdef
)
1206 fprintf (f
, "%d 0x%2.2x 0x%8.8lx %s\n", t
->vd_ndx
,
1207 t
->vd_flags
, t
->vd_hash
, t
->vd_nodename
);
1208 if (t
->vd_auxptr
->vda_nextptr
!= NULL
)
1210 Elf_Internal_Verdaux
*a
;
1213 for (a
= t
->vd_auxptr
->vda_nextptr
;
1216 fprintf (f
, "%s ", a
->vda_nodename
);
1222 if (elf_dynverref (abfd
) != 0)
1224 Elf_Internal_Verneed
*t
;
1226 fprintf (f
, _("\nVersion References:\n"));
1227 for (t
= elf_tdata (abfd
)->verref
; t
!= NULL
; t
= t
->vn_nextref
)
1229 Elf_Internal_Vernaux
*a
;
1231 fprintf (f
, _(" required from %s:\n"), t
->vn_filename
);
1232 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1233 fprintf (f
, " 0x%8.8lx 0x%2.2x %2.2d %s\n", a
->vna_hash
,
1234 a
->vna_flags
, a
->vna_other
, a
->vna_nodename
);
1246 /* Display ELF-specific fields of a symbol. */
1249 bfd_elf_print_symbol (bfd
*abfd
,
1252 bfd_print_symbol_type how
)
1257 case bfd_print_symbol_name
:
1258 fprintf (file
, "%s", symbol
->name
);
1260 case bfd_print_symbol_more
:
1261 fprintf (file
, "elf ");
1262 bfd_fprintf_vma (abfd
, file
, symbol
->value
);
1263 fprintf (file
, " %lx", (long) symbol
->flags
);
1265 case bfd_print_symbol_all
:
1267 const char *section_name
;
1268 const char *name
= NULL
;
1269 const struct elf_backend_data
*bed
;
1270 unsigned char st_other
;
1273 section_name
= symbol
->section
? symbol
->section
->name
: "(*none*)";
1275 bed
= get_elf_backend_data (abfd
);
1276 if (bed
->elf_backend_print_symbol_all
)
1277 name
= (*bed
->elf_backend_print_symbol_all
) (abfd
, filep
, symbol
);
1281 name
= symbol
->name
;
1282 bfd_print_symbol_vandf (abfd
, file
, symbol
);
1285 fprintf (file
, " %s\t", section_name
);
1286 /* Print the "other" value for a symbol. For common symbols,
1287 we've already printed the size; now print the alignment.
1288 For other symbols, we have no specified alignment, and
1289 we've printed the address; now print the size. */
1290 if (bfd_is_com_section (symbol
->section
))
1291 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_value
;
1293 val
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_size
;
1294 bfd_fprintf_vma (abfd
, file
, val
);
1296 /* If we have version information, print it. */
1297 if (elf_tdata (abfd
)->dynversym_section
!= 0
1298 && (elf_tdata (abfd
)->dynverdef_section
!= 0
1299 || elf_tdata (abfd
)->dynverref_section
!= 0))
1301 unsigned int vernum
;
1302 const char *version_string
;
1304 vernum
= ((elf_symbol_type
*) symbol
)->version
& VERSYM_VERSION
;
1307 version_string
= "";
1308 else if (vernum
== 1)
1309 version_string
= "Base";
1310 else if (vernum
<= elf_tdata (abfd
)->cverdefs
)
1312 elf_tdata (abfd
)->verdef
[vernum
- 1].vd_nodename
;
1315 Elf_Internal_Verneed
*t
;
1317 version_string
= "";
1318 for (t
= elf_tdata (abfd
)->verref
;
1322 Elf_Internal_Vernaux
*a
;
1324 for (a
= t
->vn_auxptr
; a
!= NULL
; a
= a
->vna_nextptr
)
1326 if (a
->vna_other
== vernum
)
1328 version_string
= a
->vna_nodename
;
1335 if ((((elf_symbol_type
*) symbol
)->version
& VERSYM_HIDDEN
) == 0)
1336 fprintf (file
, " %-11s", version_string
);
1341 fprintf (file
, " (%s)", version_string
);
1342 for (i
= 10 - strlen (version_string
); i
> 0; --i
)
1347 /* If the st_other field is not zero, print it. */
1348 st_other
= ((elf_symbol_type
*) symbol
)->internal_elf_sym
.st_other
;
1353 case STV_INTERNAL
: fprintf (file
, " .internal"); break;
1354 case STV_HIDDEN
: fprintf (file
, " .hidden"); break;
1355 case STV_PROTECTED
: fprintf (file
, " .protected"); break;
1357 /* Some other non-defined flags are also present, so print
1359 fprintf (file
, " 0x%02x", (unsigned int) st_other
);
1362 fprintf (file
, " %s", name
);
1368 /* Create an entry in an ELF linker hash table. */
1370 struct bfd_hash_entry
*
1371 _bfd_elf_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1372 struct bfd_hash_table
*table
,
1375 /* Allocate the structure if it has not already been allocated by a
1379 entry
= bfd_hash_allocate (table
, sizeof (struct elf_link_hash_entry
));
1384 /* Call the allocation method of the superclass. */
1385 entry
= _bfd_link_hash_newfunc (entry
, table
, string
);
1388 struct elf_link_hash_entry
*ret
= (struct elf_link_hash_entry
*) entry
;
1389 struct elf_link_hash_table
*htab
= (struct elf_link_hash_table
*) table
;
1391 /* Set local fields. */
1394 ret
->got
= ret
->plt
= htab
->init_refcount
;
1395 memset (&ret
->size
, 0, (sizeof (struct elf_link_hash_entry
)
1396 - offsetof (struct elf_link_hash_entry
, size
)));
1397 /* Assume that we have been called by a non-ELF symbol reader.
1398 This flag is then reset by the code which reads an ELF input
1399 file. This ensures that a symbol created by a non-ELF symbol
1400 reader will have the flag set correctly. */
1407 /* Copy data from an indirect symbol to its direct symbol, hiding the
1408 old indirect symbol. Also used for copying flags to a weakdef. */
1411 _bfd_elf_link_hash_copy_indirect (const struct elf_backend_data
*bed
,
1412 struct elf_link_hash_entry
*dir
,
1413 struct elf_link_hash_entry
*ind
)
1416 bfd_signed_vma lowest_valid
= bed
->can_refcount
;
1418 /* Copy down any references that we may have already seen to the
1419 symbol which just became indirect. */
1421 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1422 dir
->ref_regular
|= ind
->ref_regular
;
1423 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1424 dir
->non_got_ref
|= ind
->non_got_ref
;
1425 dir
->needs_plt
|= ind
->needs_plt
;
1426 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1428 if (ind
->root
.type
!= bfd_link_hash_indirect
)
1431 /* Copy over the global and procedure linkage table refcount entries.
1432 These may have been already set up by a check_relocs routine. */
1433 tmp
= dir
->got
.refcount
;
1434 if (tmp
< lowest_valid
)
1436 dir
->got
.refcount
= ind
->got
.refcount
;
1437 ind
->got
.refcount
= tmp
;
1440 BFD_ASSERT (ind
->got
.refcount
< lowest_valid
);
1442 tmp
= dir
->plt
.refcount
;
1443 if (tmp
< lowest_valid
)
1445 dir
->plt
.refcount
= ind
->plt
.refcount
;
1446 ind
->plt
.refcount
= tmp
;
1449 BFD_ASSERT (ind
->plt
.refcount
< lowest_valid
);
1451 if (dir
->dynindx
== -1)
1453 dir
->dynindx
= ind
->dynindx
;
1454 dir
->dynstr_index
= ind
->dynstr_index
;
1456 ind
->dynstr_index
= 0;
1459 BFD_ASSERT (ind
->dynindx
== -1);
1463 _bfd_elf_link_hash_hide_symbol (struct bfd_link_info
*info
,
1464 struct elf_link_hash_entry
*h
,
1465 bfd_boolean force_local
)
1467 h
->plt
= elf_hash_table (info
)->init_offset
;
1471 h
->forced_local
= 1;
1472 if (h
->dynindx
!= -1)
1475 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1481 /* Initialize an ELF linker hash table. */
1484 _bfd_elf_link_hash_table_init
1485 (struct elf_link_hash_table
*table
,
1487 struct bfd_hash_entry
*(*newfunc
) (struct bfd_hash_entry
*,
1488 struct bfd_hash_table
*,
1493 table
->dynamic_sections_created
= FALSE
;
1494 table
->dynobj
= NULL
;
1495 /* Make sure can_refcount is extended to the width and signedness of
1496 init_refcount before we subtract one from it. */
1497 table
->init_refcount
.refcount
= get_elf_backend_data (abfd
)->can_refcount
;
1498 table
->init_refcount
.refcount
-= 1;
1499 table
->init_offset
.offset
= -(bfd_vma
) 1;
1500 /* The first dynamic symbol is a dummy. */
1501 table
->dynsymcount
= 1;
1502 table
->dynstr
= NULL
;
1503 table
->bucketcount
= 0;
1504 table
->needed
= NULL
;
1506 table
->merge_info
= NULL
;
1507 memset (&table
->stab_info
, 0, sizeof (table
->stab_info
));
1508 memset (&table
->eh_info
, 0, sizeof (table
->eh_info
));
1509 table
->dynlocal
= NULL
;
1510 table
->runpath
= NULL
;
1511 table
->tls_sec
= NULL
;
1512 table
->tls_size
= 0;
1513 table
->loaded
= NULL
;
1514 table
->is_relocatable_executable
= FALSE
;
1516 ret
= _bfd_link_hash_table_init (&table
->root
, abfd
, newfunc
);
1517 table
->root
.type
= bfd_link_elf_hash_table
;
1522 /* Create an ELF linker hash table. */
1524 struct bfd_link_hash_table
*
1525 _bfd_elf_link_hash_table_create (bfd
*abfd
)
1527 struct elf_link_hash_table
*ret
;
1528 bfd_size_type amt
= sizeof (struct elf_link_hash_table
);
1530 ret
= bfd_malloc (amt
);
1534 if (! _bfd_elf_link_hash_table_init (ret
, abfd
, _bfd_elf_link_hash_newfunc
))
1543 /* This is a hook for the ELF emulation code in the generic linker to
1544 tell the backend linker what file name to use for the DT_NEEDED
1545 entry for a dynamic object. */
1548 bfd_elf_set_dt_needed_name (bfd
*abfd
, const char *name
)
1550 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1551 && bfd_get_format (abfd
) == bfd_object
)
1552 elf_dt_name (abfd
) = name
;
1556 bfd_elf_get_dyn_lib_class (bfd
*abfd
)
1559 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1560 && bfd_get_format (abfd
) == bfd_object
)
1561 lib_class
= elf_dyn_lib_class (abfd
);
1568 bfd_elf_set_dyn_lib_class (bfd
*abfd
, int lib_class
)
1570 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1571 && bfd_get_format (abfd
) == bfd_object
)
1572 elf_dyn_lib_class (abfd
) = lib_class
;
1575 /* Get the list of DT_NEEDED entries for a link. This is a hook for
1576 the linker ELF emulation code. */
1578 struct bfd_link_needed_list
*
1579 bfd_elf_get_needed_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1580 struct bfd_link_info
*info
)
1582 if (! is_elf_hash_table (info
->hash
))
1584 return elf_hash_table (info
)->needed
;
1587 /* Get the list of DT_RPATH/DT_RUNPATH entries for a link. This is a
1588 hook for the linker ELF emulation code. */
1590 struct bfd_link_needed_list
*
1591 bfd_elf_get_runpath_list (bfd
*abfd ATTRIBUTE_UNUSED
,
1592 struct bfd_link_info
*info
)
1594 if (! is_elf_hash_table (info
->hash
))
1596 return elf_hash_table (info
)->runpath
;
1599 /* Get the name actually used for a dynamic object for a link. This
1600 is the SONAME entry if there is one. Otherwise, it is the string
1601 passed to bfd_elf_set_dt_needed_name, or it is the filename. */
1604 bfd_elf_get_dt_soname (bfd
*abfd
)
1606 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1607 && bfd_get_format (abfd
) == bfd_object
)
1608 return elf_dt_name (abfd
);
1612 /* Get the list of DT_NEEDED entries from a BFD. This is a hook for
1613 the ELF linker emulation code. */
1616 bfd_elf_get_bfd_needed_list (bfd
*abfd
,
1617 struct bfd_link_needed_list
**pneeded
)
1620 bfd_byte
*dynbuf
= NULL
;
1622 unsigned long shlink
;
1623 bfd_byte
*extdyn
, *extdynend
;
1625 void (*swap_dyn_in
) (bfd
*, const void *, Elf_Internal_Dyn
*);
1629 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1630 || bfd_get_format (abfd
) != bfd_object
)
1633 s
= bfd_get_section_by_name (abfd
, ".dynamic");
1634 if (s
== NULL
|| s
->size
== 0)
1637 if (!bfd_malloc_and_get_section (abfd
, s
, &dynbuf
))
1640 elfsec
= _bfd_elf_section_from_bfd_section (abfd
, s
);
1644 shlink
= elf_elfsections (abfd
)[elfsec
]->sh_link
;
1646 extdynsize
= get_elf_backend_data (abfd
)->s
->sizeof_dyn
;
1647 swap_dyn_in
= get_elf_backend_data (abfd
)->s
->swap_dyn_in
;
1650 extdynend
= extdyn
+ s
->size
;
1651 for (; extdyn
< extdynend
; extdyn
+= extdynsize
)
1653 Elf_Internal_Dyn dyn
;
1655 (*swap_dyn_in
) (abfd
, extdyn
, &dyn
);
1657 if (dyn
.d_tag
== DT_NULL
)
1660 if (dyn
.d_tag
== DT_NEEDED
)
1663 struct bfd_link_needed_list
*l
;
1664 unsigned int tagv
= dyn
.d_un
.d_val
;
1667 string
= bfd_elf_string_from_elf_section (abfd
, shlink
, tagv
);
1672 l
= bfd_alloc (abfd
, amt
);
1693 /* Allocate an ELF string table--force the first byte to be zero. */
1695 struct bfd_strtab_hash
*
1696 _bfd_elf_stringtab_init (void)
1698 struct bfd_strtab_hash
*ret
;
1700 ret
= _bfd_stringtab_init ();
1705 loc
= _bfd_stringtab_add (ret
, "", TRUE
, FALSE
);
1706 BFD_ASSERT (loc
== 0 || loc
== (bfd_size_type
) -1);
1707 if (loc
== (bfd_size_type
) -1)
1709 _bfd_stringtab_free (ret
);
1716 /* ELF .o/exec file reading */
1718 /* Create a new bfd section from an ELF section header. */
1721 bfd_section_from_shdr (bfd
*abfd
, unsigned int shindex
)
1723 Elf_Internal_Shdr
*hdr
= elf_elfsections (abfd
)[shindex
];
1724 Elf_Internal_Ehdr
*ehdr
= elf_elfheader (abfd
);
1725 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
1728 name
= bfd_elf_string_from_elf_section (abfd
,
1729 elf_elfheader (abfd
)->e_shstrndx
,
1732 switch (hdr
->sh_type
)
1735 /* Inactive section. Throw it away. */
1738 case SHT_PROGBITS
: /* Normal section with contents. */
1739 case SHT_NOBITS
: /* .bss section. */
1740 case SHT_HASH
: /* .hash section. */
1741 case SHT_NOTE
: /* .note section. */
1742 case SHT_INIT_ARRAY
: /* .init_array section. */
1743 case SHT_FINI_ARRAY
: /* .fini_array section. */
1744 case SHT_PREINIT_ARRAY
: /* .preinit_array section. */
1745 case SHT_GNU_LIBLIST
: /* .gnu.liblist section. */
1746 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1748 case SHT_DYNAMIC
: /* Dynamic linking information. */
1749 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
1751 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_STRTAB
)
1753 Elf_Internal_Shdr
*dynsymhdr
;
1755 /* The shared libraries distributed with hpux11 have a bogus
1756 sh_link field for the ".dynamic" section. Find the
1757 string table for the ".dynsym" section instead. */
1758 if (elf_dynsymtab (abfd
) != 0)
1760 dynsymhdr
= elf_elfsections (abfd
)[elf_dynsymtab (abfd
)];
1761 hdr
->sh_link
= dynsymhdr
->sh_link
;
1765 unsigned int i
, num_sec
;
1767 num_sec
= elf_numsections (abfd
);
1768 for (i
= 1; i
< num_sec
; i
++)
1770 dynsymhdr
= elf_elfsections (abfd
)[i
];
1771 if (dynsymhdr
->sh_type
== SHT_DYNSYM
)
1773 hdr
->sh_link
= dynsymhdr
->sh_link
;
1781 case SHT_SYMTAB
: /* A symbol table */
1782 if (elf_onesymtab (abfd
) == shindex
)
1785 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1786 BFD_ASSERT (elf_onesymtab (abfd
) == 0);
1787 elf_onesymtab (abfd
) = shindex
;
1788 elf_tdata (abfd
)->symtab_hdr
= *hdr
;
1789 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1790 abfd
->flags
|= HAS_SYMS
;
1792 /* Sometimes a shared object will map in the symbol table. If
1793 SHF_ALLOC is set, and this is a shared object, then we also
1794 treat this section as a BFD section. We can not base the
1795 decision purely on SHF_ALLOC, because that flag is sometimes
1796 set in a relocatable object file, which would confuse the
1798 if ((hdr
->sh_flags
& SHF_ALLOC
) != 0
1799 && (abfd
->flags
& DYNAMIC
) != 0
1800 && ! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1804 /* Go looking for SHT_SYMTAB_SHNDX too, since if there is one we
1805 can't read symbols without that section loaded as well. It
1806 is most likely specified by the next section header. */
1807 if (elf_elfsections (abfd
)[elf_symtab_shndx (abfd
)]->sh_link
!= shindex
)
1809 unsigned int i
, num_sec
;
1811 num_sec
= elf_numsections (abfd
);
1812 for (i
= shindex
+ 1; i
< num_sec
; i
++)
1814 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1815 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1816 && hdr2
->sh_link
== shindex
)
1820 for (i
= 1; i
< shindex
; i
++)
1822 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1823 if (hdr2
->sh_type
== SHT_SYMTAB_SHNDX
1824 && hdr2
->sh_link
== shindex
)
1828 return bfd_section_from_shdr (abfd
, i
);
1832 case SHT_DYNSYM
: /* A dynamic symbol table */
1833 if (elf_dynsymtab (abfd
) == shindex
)
1836 BFD_ASSERT (hdr
->sh_entsize
== bed
->s
->sizeof_sym
);
1837 BFD_ASSERT (elf_dynsymtab (abfd
) == 0);
1838 elf_dynsymtab (abfd
) = shindex
;
1839 elf_tdata (abfd
)->dynsymtab_hdr
= *hdr
;
1840 elf_elfsections (abfd
)[shindex
] = hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
1841 abfd
->flags
|= HAS_SYMS
;
1843 /* Besides being a symbol table, we also treat this as a regular
1844 section, so that objcopy can handle it. */
1845 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1847 case SHT_SYMTAB_SHNDX
: /* Symbol section indices when >64k sections */
1848 if (elf_symtab_shndx (abfd
) == shindex
)
1851 BFD_ASSERT (elf_symtab_shndx (abfd
) == 0);
1852 elf_symtab_shndx (abfd
) = shindex
;
1853 elf_tdata (abfd
)->symtab_shndx_hdr
= *hdr
;
1854 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->symtab_shndx_hdr
;
1857 case SHT_STRTAB
: /* A string table */
1858 if (hdr
->bfd_section
!= NULL
)
1860 if (ehdr
->e_shstrndx
== shindex
)
1862 elf_tdata (abfd
)->shstrtab_hdr
= *hdr
;
1863 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->shstrtab_hdr
;
1866 if (elf_elfsections (abfd
)[elf_onesymtab (abfd
)]->sh_link
== shindex
)
1869 elf_tdata (abfd
)->strtab_hdr
= *hdr
;
1870 elf_elfsections (abfd
)[shindex
] = &elf_tdata (abfd
)->strtab_hdr
;
1873 if (elf_elfsections (abfd
)[elf_dynsymtab (abfd
)]->sh_link
== shindex
)
1876 elf_tdata (abfd
)->dynstrtab_hdr
= *hdr
;
1877 hdr
= &elf_tdata (abfd
)->dynstrtab_hdr
;
1878 elf_elfsections (abfd
)[shindex
] = hdr
;
1879 /* We also treat this as a regular section, so that objcopy
1881 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1885 /* If the string table isn't one of the above, then treat it as a
1886 regular section. We need to scan all the headers to be sure,
1887 just in case this strtab section appeared before the above. */
1888 if (elf_onesymtab (abfd
) == 0 || elf_dynsymtab (abfd
) == 0)
1890 unsigned int i
, num_sec
;
1892 num_sec
= elf_numsections (abfd
);
1893 for (i
= 1; i
< num_sec
; i
++)
1895 Elf_Internal_Shdr
*hdr2
= elf_elfsections (abfd
)[i
];
1896 if (hdr2
->sh_link
== shindex
)
1898 if (! bfd_section_from_shdr (abfd
, i
))
1900 if (elf_onesymtab (abfd
) == i
)
1902 if (elf_dynsymtab (abfd
) == i
)
1903 goto dynsymtab_strtab
;
1907 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
1911 /* *These* do a lot of work -- but build no sections! */
1913 asection
*target_sect
;
1914 Elf_Internal_Shdr
*hdr2
;
1915 unsigned int num_sec
= elf_numsections (abfd
);
1917 /* Check for a bogus link to avoid crashing. */
1918 if ((hdr
->sh_link
>= SHN_LORESERVE
&& hdr
->sh_link
<= SHN_HIRESERVE
)
1919 || hdr
->sh_link
>= num_sec
)
1921 ((*_bfd_error_handler
)
1922 (_("%B: invalid link %lu for reloc section %s (index %u)"),
1923 abfd
, hdr
->sh_link
, name
, shindex
));
1924 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1928 /* For some incomprehensible reason Oracle distributes
1929 libraries for Solaris in which some of the objects have
1930 bogus sh_link fields. It would be nice if we could just
1931 reject them, but, unfortunately, some people need to use
1932 them. We scan through the section headers; if we find only
1933 one suitable symbol table, we clobber the sh_link to point
1934 to it. I hope this doesn't break anything. */
1935 if (elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_SYMTAB
1936 && elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
!= SHT_DYNSYM
)
1942 for (scan
= 1; scan
< num_sec
; scan
++)
1944 if (elf_elfsections (abfd
)[scan
]->sh_type
== SHT_SYMTAB
1945 || elf_elfsections (abfd
)[scan
]->sh_type
== SHT_DYNSYM
)
1956 hdr
->sh_link
= found
;
1959 /* Get the symbol table. */
1960 if ((elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_SYMTAB
1961 || elf_elfsections (abfd
)[hdr
->sh_link
]->sh_type
== SHT_DYNSYM
)
1962 && ! bfd_section_from_shdr (abfd
, hdr
->sh_link
))
1965 /* If this reloc section does not use the main symbol table we
1966 don't treat it as a reloc section. BFD can't adequately
1967 represent such a section, so at least for now, we don't
1968 try. We just present it as a normal section. We also
1969 can't use it as a reloc section if it points to the null
1971 if (hdr
->sh_link
!= elf_onesymtab (abfd
) || hdr
->sh_info
== SHN_UNDEF
)
1972 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
,
1975 if (! bfd_section_from_shdr (abfd
, hdr
->sh_info
))
1977 target_sect
= bfd_section_from_elf_index (abfd
, hdr
->sh_info
);
1978 if (target_sect
== NULL
)
1981 if ((target_sect
->flags
& SEC_RELOC
) == 0
1982 || target_sect
->reloc_count
== 0)
1983 hdr2
= &elf_section_data (target_sect
)->rel_hdr
;
1987 BFD_ASSERT (elf_section_data (target_sect
)->rel_hdr2
== NULL
);
1988 amt
= sizeof (*hdr2
);
1989 hdr2
= bfd_alloc (abfd
, amt
);
1990 elf_section_data (target_sect
)->rel_hdr2
= hdr2
;
1993 elf_elfsections (abfd
)[shindex
] = hdr2
;
1994 target_sect
->reloc_count
+= NUM_SHDR_ENTRIES (hdr
);
1995 target_sect
->flags
|= SEC_RELOC
;
1996 target_sect
->relocation
= NULL
;
1997 target_sect
->rel_filepos
= hdr
->sh_offset
;
1998 /* In the section to which the relocations apply, mark whether
1999 its relocations are of the REL or RELA variety. */
2000 if (hdr
->sh_size
!= 0)
2001 target_sect
->use_rela_p
= hdr
->sh_type
== SHT_RELA
;
2002 abfd
->flags
|= HAS_RELOC
;
2007 case SHT_GNU_verdef
:
2008 elf_dynverdef (abfd
) = shindex
;
2009 elf_tdata (abfd
)->dynverdef_hdr
= *hdr
;
2010 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2013 case SHT_GNU_versym
:
2014 elf_dynversym (abfd
) = shindex
;
2015 elf_tdata (abfd
)->dynversym_hdr
= *hdr
;
2016 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2019 case SHT_GNU_verneed
:
2020 elf_dynverref (abfd
) = shindex
;
2021 elf_tdata (abfd
)->dynverref_hdr
= *hdr
;
2022 return _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
);
2029 /* We need a BFD section for objcopy and relocatable linking,
2030 and it's handy to have the signature available as the section
2032 name
= group_signature (abfd
, hdr
);
2035 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
2037 if (hdr
->contents
!= NULL
)
2039 Elf_Internal_Group
*idx
= (Elf_Internal_Group
*) hdr
->contents
;
2040 unsigned int n_elt
= hdr
->sh_size
/ 4;
2043 if (idx
->flags
& GRP_COMDAT
)
2044 hdr
->bfd_section
->flags
2045 |= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2047 /* We try to keep the same section order as it comes in. */
2049 while (--n_elt
!= 0)
2050 if ((s
= (--idx
)->shdr
->bfd_section
) != NULL
2051 && elf_next_in_group (s
) != NULL
)
2053 elf_next_in_group (hdr
->bfd_section
) = s
;
2060 /* Check for any processor-specific section types. */
2061 return bed
->elf_backend_section_from_shdr (abfd
, hdr
, name
,
2068 /* Return the section for the local symbol specified by ABFD, R_SYMNDX.
2069 Return SEC for sections that have no elf section, and NULL on error. */
2072 bfd_section_from_r_symndx (bfd
*abfd
,
2073 struct sym_sec_cache
*cache
,
2075 unsigned long r_symndx
)
2077 Elf_Internal_Shdr
*symtab_hdr
;
2078 unsigned char esym
[sizeof (Elf64_External_Sym
)];
2079 Elf_External_Sym_Shndx eshndx
;
2080 Elf_Internal_Sym isym
;
2081 unsigned int ent
= r_symndx
% LOCAL_SYM_CACHE_SIZE
;
2083 if (cache
->abfd
== abfd
&& cache
->indx
[ent
] == r_symndx
)
2084 return cache
->sec
[ent
];
2086 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2087 if (bfd_elf_get_elf_syms (abfd
, symtab_hdr
, 1, r_symndx
,
2088 &isym
, esym
, &eshndx
) == NULL
)
2091 if (cache
->abfd
!= abfd
)
2093 memset (cache
->indx
, -1, sizeof (cache
->indx
));
2096 cache
->indx
[ent
] = r_symndx
;
2097 cache
->sec
[ent
] = sec
;
2098 if ((isym
.st_shndx
!= SHN_UNDEF
&& isym
.st_shndx
< SHN_LORESERVE
)
2099 || isym
.st_shndx
> SHN_HIRESERVE
)
2102 s
= bfd_section_from_elf_index (abfd
, isym
.st_shndx
);
2104 cache
->sec
[ent
] = s
;
2106 return cache
->sec
[ent
];
2109 /* Given an ELF section number, retrieve the corresponding BFD
2113 bfd_section_from_elf_index (bfd
*abfd
, unsigned int index
)
2115 if (index
>= elf_numsections (abfd
))
2117 return elf_elfsections (abfd
)[index
]->bfd_section
;
2120 static struct bfd_elf_special_section
const special_sections_b
[] =
2122 { ".bss", 4, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2123 { NULL
, 0, 0, 0, 0 }
2126 static struct bfd_elf_special_section
const special_sections_c
[] =
2128 { ".comment", 8, 0, SHT_PROGBITS
, 0 },
2129 { NULL
, 0, 0, 0, 0 }
2132 static struct bfd_elf_special_section
const special_sections_d
[] =
2134 { ".data", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2135 { ".data1", 6, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2136 { ".debug", 6, 0, SHT_PROGBITS
, 0 },
2137 { ".debug_line", 11, 0, SHT_PROGBITS
, 0 },
2138 { ".debug_info", 11, 0, SHT_PROGBITS
, 0 },
2139 { ".debug_abbrev", 13, 0, SHT_PROGBITS
, 0 },
2140 { ".debug_aranges", 14, 0, SHT_PROGBITS
, 0 },
2141 { ".dynamic", 8, 0, SHT_DYNAMIC
, SHF_ALLOC
},
2142 { ".dynstr", 7, 0, SHT_STRTAB
, SHF_ALLOC
},
2143 { ".dynsym", 7, 0, SHT_DYNSYM
, SHF_ALLOC
},
2144 { NULL
, 0, 0, 0, 0 }
2147 static struct bfd_elf_special_section
const special_sections_f
[] =
2149 { ".fini", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2150 { ".fini_array", 11, 0, SHT_FINI_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2151 { NULL
, 0, 0, 0, 0 }
2154 static struct bfd_elf_special_section
const special_sections_g
[] =
2156 { ".gnu.linkonce.b",15, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
},
2157 { ".got", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
},
2158 { ".gnu.version", 12, 0, SHT_GNU_versym
, 0 },
2159 { ".gnu.version_d", 14, 0, SHT_GNU_verdef
, 0 },
2160 { ".gnu.version_r", 14, 0, SHT_GNU_verneed
, 0 },
2161 { ".gnu.liblist", 12, 0, SHT_GNU_LIBLIST
, SHF_ALLOC
},
2162 { ".gnu.conflict", 13, 0, SHT_RELA
, SHF_ALLOC
},
2163 { NULL
, 0, 0, 0, 0 }
2166 static struct bfd_elf_special_section
const special_sections_h
[] =
2168 { ".hash", 5, 0, SHT_HASH
, SHF_ALLOC
},
2169 { NULL
, 0, 0, 0, 0 }
2172 static struct bfd_elf_special_section
const special_sections_i
[] =
2174 { ".init", 5, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2175 { ".init_array", 11, 0, SHT_INIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2176 { ".interp", 7, 0, SHT_PROGBITS
, 0 },
2177 { NULL
, 0, 0, 0, 0 }
2180 static struct bfd_elf_special_section
const special_sections_l
[] =
2182 { ".line", 5, 0, SHT_PROGBITS
, 0 },
2183 { NULL
, 0, 0, 0, 0 }
2186 static struct bfd_elf_special_section
const special_sections_n
[] =
2188 { ".note.GNU-stack",15, 0, SHT_PROGBITS
, 0 },
2189 { ".note", 5, -1, SHT_NOTE
, 0 },
2190 { NULL
, 0, 0, 0, 0 }
2193 static struct bfd_elf_special_section
const special_sections_p
[] =
2195 { ".preinit_array", 14, 0, SHT_PREINIT_ARRAY
, SHF_ALLOC
+ SHF_WRITE
},
2196 { ".plt", 4, 0, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2197 { NULL
, 0, 0, 0, 0 }
2200 static struct bfd_elf_special_section
const special_sections_r
[] =
2202 { ".rodata", 7, -2, SHT_PROGBITS
, SHF_ALLOC
},
2203 { ".rodata1", 8, 0, SHT_PROGBITS
, SHF_ALLOC
},
2204 { ".rela", 5, -1, SHT_RELA
, 0 },
2205 { ".rel", 4, -1, SHT_REL
, 0 },
2206 { NULL
, 0, 0, 0, 0 }
2209 static struct bfd_elf_special_section
const special_sections_s
[] =
2211 { ".shstrtab", 9, 0, SHT_STRTAB
, 0 },
2212 { ".strtab", 7, 0, SHT_STRTAB
, 0 },
2213 { ".symtab", 7, 0, SHT_SYMTAB
, 0 },
2214 { ".stabstr", 5, 3, SHT_STRTAB
, 0 },
2215 { NULL
, 0, 0, 0, 0 }
2218 static struct bfd_elf_special_section
const special_sections_t
[] =
2220 { ".text", 5, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_EXECINSTR
},
2221 { ".tbss", 5, -2, SHT_NOBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2222 { ".tdata", 6, -2, SHT_PROGBITS
, SHF_ALLOC
+ SHF_WRITE
+ SHF_TLS
},
2223 { NULL
, 0, 0, 0, 0 }
2226 static struct bfd_elf_special_section
const *special_sections
[27] =
2229 special_sections_b
, /* 'b' */
2230 special_sections_c
, /* 'b' */
2231 special_sections_d
, /* 'd' */
2233 special_sections_f
, /* 'f' */
2234 special_sections_g
, /* 'g' */
2235 special_sections_h
, /* 'h' */
2236 special_sections_i
, /* 'i' */
2239 special_sections_l
, /* 'l' */
2241 special_sections_n
, /* 'n' */
2243 special_sections_p
, /* 'p' */
2245 special_sections_r
, /* 'r' */
2246 special_sections_s
, /* 's' */
2247 special_sections_t
, /* 't' */
2257 static const struct bfd_elf_special_section
*
2258 get_special_section (const char *name
,
2259 const struct bfd_elf_special_section
**special_sections_p
,
2264 const struct bfd_elf_special_section
*special_sections
;
2266 if (name
[0] == '.')
2269 if (i
< 0 || i
> 25)
2275 special_sections
= special_sections_p
[i
];
2277 if (!special_sections
)
2278 return special_sections
;
2282 for (i
= 0; special_sections
[i
].prefix
!= NULL
; i
++)
2285 int prefix_len
= special_sections
[i
].prefix_length
;
2287 if (len
< prefix_len
)
2289 if (memcmp (name
, special_sections
[i
].prefix
, prefix_len
) != 0)
2292 suffix_len
= special_sections
[i
].suffix_length
;
2293 if (suffix_len
<= 0)
2295 if (name
[prefix_len
] != 0)
2297 if (suffix_len
== 0)
2299 if (name
[prefix_len
] != '.'
2300 && (suffix_len
== -2
2301 || (rela
&& special_sections
[i
].type
== SHT_REL
)))
2307 if (len
< prefix_len
+ suffix_len
)
2309 if (memcmp (name
+ len
- suffix_len
,
2310 special_sections
[i
].prefix
+ prefix_len
,
2314 return &special_sections
[i
];
2320 const struct bfd_elf_special_section
*
2321 _bfd_elf_get_sec_type_attr (bfd
*abfd
, const char *name
)
2323 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2324 const struct bfd_elf_special_section
*ssect
= NULL
;
2326 /* See if this is one of the special sections. */
2329 unsigned int rela
= bed
->default_use_rela_p
;
2331 if (bed
->special_sections
)
2332 ssect
= get_special_section (name
, bed
->special_sections
, rela
);
2335 ssect
= get_special_section (name
, special_sections
, rela
);
2342 _bfd_elf_new_section_hook (bfd
*abfd
, asection
*sec
)
2344 struct bfd_elf_section_data
*sdata
;
2345 const struct bfd_elf_special_section
*ssect
;
2347 sdata
= (struct bfd_elf_section_data
*) sec
->used_by_bfd
;
2350 sdata
= bfd_zalloc (abfd
, sizeof (*sdata
));
2353 sec
->used_by_bfd
= sdata
;
2356 /* When we read a file, we don't need section type and flags unless
2357 it is a linker created section. They will be overridden in
2358 _bfd_elf_make_section_from_shdr anyway. */
2359 if (abfd
->direction
!= read_direction
2360 || (sec
->flags
& SEC_LINKER_CREATED
) != 0)
2362 ssect
= _bfd_elf_get_sec_type_attr (abfd
, sec
->name
);
2365 elf_section_type (sec
) = ssect
->type
;
2366 elf_section_flags (sec
) = ssect
->attr
;
2370 /* Indicate whether or not this section should use RELA relocations. */
2371 sec
->use_rela_p
= get_elf_backend_data (abfd
)->default_use_rela_p
;
2376 /* Create a new bfd section from an ELF program header.
2378 Since program segments have no names, we generate a synthetic name
2379 of the form segment<NUM>, where NUM is generally the index in the
2380 program header table. For segments that are split (see below) we
2381 generate the names segment<NUM>a and segment<NUM>b.
2383 Note that some program segments may have a file size that is different than
2384 (less than) the memory size. All this means is that at execution the
2385 system must allocate the amount of memory specified by the memory size,
2386 but only initialize it with the first "file size" bytes read from the
2387 file. This would occur for example, with program segments consisting
2388 of combined data+bss.
2390 To handle the above situation, this routine generates TWO bfd sections
2391 for the single program segment. The first has the length specified by
2392 the file size of the segment, and the second has the length specified
2393 by the difference between the two sizes. In effect, the segment is split
2394 into it's initialized and uninitialized parts.
2399 _bfd_elf_make_section_from_phdr (bfd
*abfd
,
2400 Elf_Internal_Phdr
*hdr
,
2402 const char *typename
)
2410 split
= ((hdr
->p_memsz
> 0)
2411 && (hdr
->p_filesz
> 0)
2412 && (hdr
->p_memsz
> hdr
->p_filesz
));
2413 sprintf (namebuf
, "%s%d%s", typename
, index
, split
? "a" : "");
2414 len
= strlen (namebuf
) + 1;
2415 name
= bfd_alloc (abfd
, len
);
2418 memcpy (name
, namebuf
, len
);
2419 newsect
= bfd_make_section (abfd
, name
);
2420 if (newsect
== NULL
)
2422 newsect
->vma
= hdr
->p_vaddr
;
2423 newsect
->lma
= hdr
->p_paddr
;
2424 newsect
->size
= hdr
->p_filesz
;
2425 newsect
->filepos
= hdr
->p_offset
;
2426 newsect
->flags
|= SEC_HAS_CONTENTS
;
2427 newsect
->alignment_power
= bfd_log2 (hdr
->p_align
);
2428 if (hdr
->p_type
== PT_LOAD
)
2430 newsect
->flags
|= SEC_ALLOC
;
2431 newsect
->flags
|= SEC_LOAD
;
2432 if (hdr
->p_flags
& PF_X
)
2434 /* FIXME: all we known is that it has execute PERMISSION,
2436 newsect
->flags
|= SEC_CODE
;
2439 if (!(hdr
->p_flags
& PF_W
))
2441 newsect
->flags
|= SEC_READONLY
;
2446 sprintf (namebuf
, "%s%db", typename
, index
);
2447 len
= strlen (namebuf
) + 1;
2448 name
= bfd_alloc (abfd
, len
);
2451 memcpy (name
, namebuf
, len
);
2452 newsect
= bfd_make_section (abfd
, name
);
2453 if (newsect
== NULL
)
2455 newsect
->vma
= hdr
->p_vaddr
+ hdr
->p_filesz
;
2456 newsect
->lma
= hdr
->p_paddr
+ hdr
->p_filesz
;
2457 newsect
->size
= hdr
->p_memsz
- hdr
->p_filesz
;
2458 if (hdr
->p_type
== PT_LOAD
)
2460 newsect
->flags
|= SEC_ALLOC
;
2461 if (hdr
->p_flags
& PF_X
)
2462 newsect
->flags
|= SEC_CODE
;
2464 if (!(hdr
->p_flags
& PF_W
))
2465 newsect
->flags
|= SEC_READONLY
;
2472 bfd_section_from_phdr (bfd
*abfd
, Elf_Internal_Phdr
*hdr
, int index
)
2474 const struct elf_backend_data
*bed
;
2476 switch (hdr
->p_type
)
2479 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "null");
2482 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "load");
2485 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "dynamic");
2488 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "interp");
2491 if (! _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "note"))
2493 if (! elfcore_read_notes (abfd
, hdr
->p_offset
, hdr
->p_filesz
))
2498 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "shlib");
2501 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "phdr");
2503 case PT_GNU_EH_FRAME
:
2504 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
,
2508 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "stack");
2511 return _bfd_elf_make_section_from_phdr (abfd
, hdr
, index
, "relro");
2514 /* Check for any processor-specific program segment types. */
2515 bed
= get_elf_backend_data (abfd
);
2516 return bed
->elf_backend_section_from_phdr (abfd
, hdr
, index
, "proc");
2520 /* Initialize REL_HDR, the section-header for new section, containing
2521 relocations against ASECT. If USE_RELA_P is TRUE, we use RELA
2522 relocations; otherwise, we use REL relocations. */
2525 _bfd_elf_init_reloc_shdr (bfd
*abfd
,
2526 Elf_Internal_Shdr
*rel_hdr
,
2528 bfd_boolean use_rela_p
)
2531 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2532 bfd_size_type amt
= sizeof ".rela" + strlen (asect
->name
);
2534 name
= bfd_alloc (abfd
, amt
);
2537 sprintf (name
, "%s%s", use_rela_p
? ".rela" : ".rel", asect
->name
);
2539 (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
), name
,
2541 if (rel_hdr
->sh_name
== (unsigned int) -1)
2543 rel_hdr
->sh_type
= use_rela_p
? SHT_RELA
: SHT_REL
;
2544 rel_hdr
->sh_entsize
= (use_rela_p
2545 ? bed
->s
->sizeof_rela
2546 : bed
->s
->sizeof_rel
);
2547 rel_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
2548 rel_hdr
->sh_flags
= 0;
2549 rel_hdr
->sh_addr
= 0;
2550 rel_hdr
->sh_size
= 0;
2551 rel_hdr
->sh_offset
= 0;
2556 /* Set up an ELF internal section header for a section. */
2559 elf_fake_sections (bfd
*abfd
, asection
*asect
, void *failedptrarg
)
2561 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
2562 bfd_boolean
*failedptr
= failedptrarg
;
2563 Elf_Internal_Shdr
*this_hdr
;
2567 /* We already failed; just get out of the bfd_map_over_sections
2572 this_hdr
= &elf_section_data (asect
)->this_hdr
;
2574 this_hdr
->sh_name
= (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2575 asect
->name
, FALSE
);
2576 if (this_hdr
->sh_name
== (unsigned int) -1)
2582 this_hdr
->sh_flags
= 0;
2584 if ((asect
->flags
& SEC_ALLOC
) != 0
2585 || asect
->user_set_vma
)
2586 this_hdr
->sh_addr
= asect
->vma
;
2588 this_hdr
->sh_addr
= 0;
2590 this_hdr
->sh_offset
= 0;
2591 this_hdr
->sh_size
= asect
->size
;
2592 this_hdr
->sh_link
= 0;
2593 this_hdr
->sh_addralign
= 1 << asect
->alignment_power
;
2594 /* The sh_entsize and sh_info fields may have been set already by
2595 copy_private_section_data. */
2597 this_hdr
->bfd_section
= asect
;
2598 this_hdr
->contents
= NULL
;
2600 /* If the section type is unspecified, we set it based on
2602 if (this_hdr
->sh_type
== SHT_NULL
)
2604 if ((asect
->flags
& SEC_GROUP
) != 0)
2606 /* We also need to mark SHF_GROUP here for relocatable
2608 struct bfd_link_order
*l
;
2611 for (l
= asect
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2612 if (l
->type
== bfd_indirect_link_order
2613 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2616 /* The name is not important. Anything will do. */
2617 elf_group_name (elt
->output_section
) = "G";
2618 elf_section_flags (elt
->output_section
) |= SHF_GROUP
;
2620 elt
= elf_next_in_group (elt
);
2621 /* During a relocatable link, the lists are
2624 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2626 this_hdr
->sh_type
= SHT_GROUP
;
2628 else if ((asect
->flags
& SEC_ALLOC
) != 0
2629 && (((asect
->flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
)) == 0)
2630 || (asect
->flags
& SEC_NEVER_LOAD
) != 0))
2631 this_hdr
->sh_type
= SHT_NOBITS
;
2633 this_hdr
->sh_type
= SHT_PROGBITS
;
2636 switch (this_hdr
->sh_type
)
2642 case SHT_INIT_ARRAY
:
2643 case SHT_FINI_ARRAY
:
2644 case SHT_PREINIT_ARRAY
:
2651 this_hdr
->sh_entsize
= bed
->s
->sizeof_hash_entry
;
2655 this_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
2659 this_hdr
->sh_entsize
= bed
->s
->sizeof_dyn
;
2663 if (get_elf_backend_data (abfd
)->may_use_rela_p
)
2664 this_hdr
->sh_entsize
= bed
->s
->sizeof_rela
;
2668 if (get_elf_backend_data (abfd
)->may_use_rel_p
)
2669 this_hdr
->sh_entsize
= bed
->s
->sizeof_rel
;
2672 case SHT_GNU_versym
:
2673 this_hdr
->sh_entsize
= sizeof (Elf_External_Versym
);
2676 case SHT_GNU_verdef
:
2677 this_hdr
->sh_entsize
= 0;
2678 /* objcopy or strip will copy over sh_info, but may not set
2679 cverdefs. The linker will set cverdefs, but sh_info will be
2681 if (this_hdr
->sh_info
== 0)
2682 this_hdr
->sh_info
= elf_tdata (abfd
)->cverdefs
;
2684 BFD_ASSERT (elf_tdata (abfd
)->cverdefs
== 0
2685 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverdefs
);
2688 case SHT_GNU_verneed
:
2689 this_hdr
->sh_entsize
= 0;
2690 /* objcopy or strip will copy over sh_info, but may not set
2691 cverrefs. The linker will set cverrefs, but sh_info will be
2693 if (this_hdr
->sh_info
== 0)
2694 this_hdr
->sh_info
= elf_tdata (abfd
)->cverrefs
;
2696 BFD_ASSERT (elf_tdata (abfd
)->cverrefs
== 0
2697 || this_hdr
->sh_info
== elf_tdata (abfd
)->cverrefs
);
2701 this_hdr
->sh_entsize
= 4;
2705 if ((asect
->flags
& SEC_ALLOC
) != 0)
2706 this_hdr
->sh_flags
|= SHF_ALLOC
;
2707 if ((asect
->flags
& SEC_READONLY
) == 0)
2708 this_hdr
->sh_flags
|= SHF_WRITE
;
2709 if ((asect
->flags
& SEC_CODE
) != 0)
2710 this_hdr
->sh_flags
|= SHF_EXECINSTR
;
2711 if ((asect
->flags
& SEC_MERGE
) != 0)
2713 this_hdr
->sh_flags
|= SHF_MERGE
;
2714 this_hdr
->sh_entsize
= asect
->entsize
;
2715 if ((asect
->flags
& SEC_STRINGS
) != 0)
2716 this_hdr
->sh_flags
|= SHF_STRINGS
;
2718 if ((asect
->flags
& SEC_GROUP
) == 0 && elf_group_name (asect
) != NULL
)
2719 this_hdr
->sh_flags
|= SHF_GROUP
;
2720 if ((asect
->flags
& SEC_THREAD_LOCAL
) != 0)
2722 this_hdr
->sh_flags
|= SHF_TLS
;
2723 if (asect
->size
== 0 && (asect
->flags
& SEC_HAS_CONTENTS
) == 0)
2725 struct bfd_link_order
*o
;
2727 this_hdr
->sh_size
= 0;
2728 for (o
= asect
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
2729 if (this_hdr
->sh_size
< o
->offset
+ o
->size
)
2730 this_hdr
->sh_size
= o
->offset
+ o
->size
;
2731 if (this_hdr
->sh_size
)
2732 this_hdr
->sh_type
= SHT_NOBITS
;
2736 /* Check for processor-specific section types. */
2737 if (bed
->elf_backend_fake_sections
2738 && !(*bed
->elf_backend_fake_sections
) (abfd
, this_hdr
, asect
))
2741 /* If the section has relocs, set up a section header for the
2742 SHT_REL[A] section. If two relocation sections are required for
2743 this section, it is up to the processor-specific back-end to
2744 create the other. */
2745 if ((asect
->flags
& SEC_RELOC
) != 0
2746 && !_bfd_elf_init_reloc_shdr (abfd
,
2747 &elf_section_data (asect
)->rel_hdr
,
2753 /* Fill in the contents of a SHT_GROUP section. */
2756 bfd_elf_set_group_contents (bfd
*abfd
, asection
*sec
, void *failedptrarg
)
2758 bfd_boolean
*failedptr
= failedptrarg
;
2759 unsigned long symindx
;
2760 asection
*elt
, *first
;
2762 struct bfd_link_order
*l
;
2765 /* Ignore linker created group section. See elfNN_ia64_object_p in
2767 if (((sec
->flags
& (SEC_GROUP
| SEC_LINKER_CREATED
)) != SEC_GROUP
)
2772 if (elf_group_id (sec
) != NULL
)
2773 symindx
= elf_group_id (sec
)->udata
.i
;
2777 /* If called from the assembler, swap_out_syms will have set up
2778 elf_section_syms; If called for "ld -r", use target_index. */
2779 if (elf_section_syms (abfd
) != NULL
)
2780 symindx
= elf_section_syms (abfd
)[sec
->index
]->udata
.i
;
2782 symindx
= sec
->target_index
;
2784 elf_section_data (sec
)->this_hdr
.sh_info
= symindx
;
2786 /* The contents won't be allocated for "ld -r" or objcopy. */
2788 if (sec
->contents
== NULL
)
2791 sec
->contents
= bfd_alloc (abfd
, sec
->size
);
2793 /* Arrange for the section to be written out. */
2794 elf_section_data (sec
)->this_hdr
.contents
= sec
->contents
;
2795 if (sec
->contents
== NULL
)
2802 loc
= sec
->contents
+ sec
->size
;
2804 /* Get the pointer to the first section in the group that gas
2805 squirreled away here. objcopy arranges for this to be set to the
2806 start of the input section group. */
2807 first
= elt
= elf_next_in_group (sec
);
2809 /* First element is a flag word. Rest of section is elf section
2810 indices for all the sections of the group. Write them backwards
2811 just to keep the group in the same order as given in .section
2812 directives, not that it matters. */
2821 s
= s
->output_section
;
2824 idx
= elf_section_data (s
)->this_idx
;
2825 H_PUT_32 (abfd
, idx
, loc
);
2826 elt
= elf_next_in_group (elt
);
2831 /* If this is a relocatable link, then the above did nothing because
2832 SEC is the output section. Look through the input sections
2834 for (l
= sec
->map_head
.link_order
; l
!= NULL
; l
= l
->next
)
2835 if (l
->type
== bfd_indirect_link_order
2836 && (elt
= elf_next_in_group (l
->u
.indirect
.section
)) != NULL
)
2841 elf_section_data (elt
->output_section
)->this_idx
, loc
);
2842 elt
= elf_next_in_group (elt
);
2843 /* During a relocatable link, the lists are circular. */
2845 while (elt
!= elf_next_in_group (l
->u
.indirect
.section
));
2847 if ((loc
-= 4) != sec
->contents
)
2850 H_PUT_32 (abfd
, sec
->flags
& SEC_LINK_ONCE
? GRP_COMDAT
: 0, loc
);
2853 /* Assign all ELF section numbers. The dummy first section is handled here
2854 too. The link/info pointers for the standard section types are filled
2855 in here too, while we're at it. */
2858 assign_section_numbers (bfd
*abfd
, struct bfd_link_info
*link_info
)
2860 struct elf_obj_tdata
*t
= elf_tdata (abfd
);
2862 unsigned int section_number
, secn
;
2863 Elf_Internal_Shdr
**i_shdrp
;
2865 struct bfd_elf_section_data
*d
;
2869 _bfd_elf_strtab_clear_all_refs (elf_shstrtab (abfd
));
2871 /* SHT_GROUP sections are in relocatable files only. */
2872 if (link_info
== NULL
|| link_info
->relocatable
)
2874 /* Put SHT_GROUP sections first. */
2875 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2877 d
= elf_section_data (sec
);
2879 if (d
->this_hdr
.sh_type
== SHT_GROUP
)
2881 if (sec
->flags
& SEC_LINKER_CREATED
)
2883 /* Remove the linker created SHT_GROUP sections. */
2884 bfd_section_list_remove (abfd
, sec
);
2885 abfd
->section_count
--;
2889 if (section_number
== SHN_LORESERVE
)
2890 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2891 d
->this_idx
= section_number
++;
2897 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2899 d
= elf_section_data (sec
);
2901 if (d
->this_hdr
.sh_type
!= SHT_GROUP
)
2903 if (section_number
== SHN_LORESERVE
)
2904 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2905 d
->this_idx
= section_number
++;
2907 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->this_hdr
.sh_name
);
2908 if ((sec
->flags
& SEC_RELOC
) == 0)
2912 if (section_number
== SHN_LORESERVE
)
2913 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2914 d
->rel_idx
= section_number
++;
2915 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr
.sh_name
);
2920 if (section_number
== SHN_LORESERVE
)
2921 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2922 d
->rel_idx2
= section_number
++;
2923 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), d
->rel_hdr2
->sh_name
);
2929 if (section_number
== SHN_LORESERVE
)
2930 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2931 t
->shstrtab_section
= section_number
++;
2932 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->shstrtab_hdr
.sh_name
);
2933 elf_elfheader (abfd
)->e_shstrndx
= t
->shstrtab_section
;
2935 if (bfd_get_symcount (abfd
) > 0)
2937 if (section_number
== SHN_LORESERVE
)
2938 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2939 t
->symtab_section
= section_number
++;
2940 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->symtab_hdr
.sh_name
);
2941 if (section_number
> SHN_LORESERVE
- 2)
2943 if (section_number
== SHN_LORESERVE
)
2944 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2945 t
->symtab_shndx_section
= section_number
++;
2946 t
->symtab_shndx_hdr
.sh_name
2947 = (unsigned int) _bfd_elf_strtab_add (elf_shstrtab (abfd
),
2948 ".symtab_shndx", FALSE
);
2949 if (t
->symtab_shndx_hdr
.sh_name
== (unsigned int) -1)
2952 if (section_number
== SHN_LORESERVE
)
2953 section_number
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2954 t
->strtab_section
= section_number
++;
2955 _bfd_elf_strtab_addref (elf_shstrtab (abfd
), t
->strtab_hdr
.sh_name
);
2958 _bfd_elf_strtab_finalize (elf_shstrtab (abfd
));
2959 t
->shstrtab_hdr
.sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
2961 elf_numsections (abfd
) = section_number
;
2962 elf_elfheader (abfd
)->e_shnum
= section_number
;
2963 if (section_number
> SHN_LORESERVE
)
2964 elf_elfheader (abfd
)->e_shnum
-= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
2966 /* Set up the list of section header pointers, in agreement with the
2968 amt
= section_number
* sizeof (Elf_Internal_Shdr
*);
2969 i_shdrp
= bfd_zalloc (abfd
, amt
);
2970 if (i_shdrp
== NULL
)
2973 amt
= sizeof (Elf_Internal_Shdr
);
2974 i_shdrp
[0] = bfd_zalloc (abfd
, amt
);
2975 if (i_shdrp
[0] == NULL
)
2977 bfd_release (abfd
, i_shdrp
);
2981 elf_elfsections (abfd
) = i_shdrp
;
2983 i_shdrp
[t
->shstrtab_section
] = &t
->shstrtab_hdr
;
2984 if (bfd_get_symcount (abfd
) > 0)
2986 i_shdrp
[t
->symtab_section
] = &t
->symtab_hdr
;
2987 if (elf_numsections (abfd
) > SHN_LORESERVE
)
2989 i_shdrp
[t
->symtab_shndx_section
] = &t
->symtab_shndx_hdr
;
2990 t
->symtab_shndx_hdr
.sh_link
= t
->symtab_section
;
2992 i_shdrp
[t
->strtab_section
] = &t
->strtab_hdr
;
2993 t
->symtab_hdr
.sh_link
= t
->strtab_section
;
2996 for (sec
= abfd
->sections
; sec
; sec
= sec
->next
)
2998 struct bfd_elf_section_data
*d
= elf_section_data (sec
);
3002 i_shdrp
[d
->this_idx
] = &d
->this_hdr
;
3003 if (d
->rel_idx
!= 0)
3004 i_shdrp
[d
->rel_idx
] = &d
->rel_hdr
;
3005 if (d
->rel_idx2
!= 0)
3006 i_shdrp
[d
->rel_idx2
] = d
->rel_hdr2
;
3008 /* Fill in the sh_link and sh_info fields while we're at it. */
3010 /* sh_link of a reloc section is the section index of the symbol
3011 table. sh_info is the section index of the section to which
3012 the relocation entries apply. */
3013 if (d
->rel_idx
!= 0)
3015 d
->rel_hdr
.sh_link
= t
->symtab_section
;
3016 d
->rel_hdr
.sh_info
= d
->this_idx
;
3018 if (d
->rel_idx2
!= 0)
3020 d
->rel_hdr2
->sh_link
= t
->symtab_section
;
3021 d
->rel_hdr2
->sh_info
= d
->this_idx
;
3024 /* We need to set up sh_link for SHF_LINK_ORDER. */
3025 if ((d
->this_hdr
.sh_flags
& SHF_LINK_ORDER
) != 0)
3027 s
= elf_linked_to_section (sec
);
3029 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3032 struct bfd_link_order
*p
;
3034 /* Find out what the corresponding section in output
3036 for (p
= sec
->map_head
.link_order
; p
!= NULL
; p
= p
->next
)
3038 s
= p
->u
.indirect
.section
;
3039 if (p
->type
== bfd_indirect_link_order
3040 && (bfd_get_flavour (s
->owner
)
3041 == bfd_target_elf_flavour
))
3043 Elf_Internal_Shdr
** const elf_shdrp
3044 = elf_elfsections (s
->owner
);
3046 = _bfd_elf_section_from_bfd_section (s
->owner
, s
);
3047 elfsec
= elf_shdrp
[elfsec
]->sh_link
;
3049 The Intel C compiler generates SHT_IA_64_UNWIND with
3050 SHF_LINK_ORDER. But it doesn't set the sh_link or
3051 sh_info fields. Hence we could get the situation
3052 where elfsec is 0. */
3055 const struct elf_backend_data
*bed
3056 = get_elf_backend_data (abfd
);
3057 if (bed
->link_order_error_handler
)
3058 bed
->link_order_error_handler
3059 (_("%B: warning: sh_link not set for section `%A'"),
3064 s
= elf_shdrp
[elfsec
]->bfd_section
;
3065 if (elf_discarded_section (s
))
3068 (*_bfd_error_handler
)
3069 (_("%B: sh_link of section `%A' points to discarded section `%A' of `%B'"),
3070 abfd
, d
->this_hdr
.bfd_section
,
3072 /* Point to the kept section if it has
3073 the same size as the discarded
3075 kept
= _bfd_elf_check_kept_section (s
);
3078 bfd_set_error (bfd_error_bad_value
);
3083 s
= s
->output_section
;
3084 BFD_ASSERT (s
!= NULL
);
3085 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3093 switch (d
->this_hdr
.sh_type
)
3097 /* A reloc section which we are treating as a normal BFD
3098 section. sh_link is the section index of the symbol
3099 table. sh_info is the section index of the section to
3100 which the relocation entries apply. We assume that an
3101 allocated reloc section uses the dynamic symbol table.
3102 FIXME: How can we be sure? */
3103 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3105 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3107 /* We look up the section the relocs apply to by name. */
3109 if (d
->this_hdr
.sh_type
== SHT_REL
)
3113 s
= bfd_get_section_by_name (abfd
, name
);
3115 d
->this_hdr
.sh_info
= elf_section_data (s
)->this_idx
;
3119 /* We assume that a section named .stab*str is a stabs
3120 string section. We look for a section with the same name
3121 but without the trailing ``str'', and set its sh_link
3122 field to point to this section. */
3123 if (strncmp (sec
->name
, ".stab", sizeof ".stab" - 1) == 0
3124 && strcmp (sec
->name
+ strlen (sec
->name
) - 3, "str") == 0)
3129 len
= strlen (sec
->name
);
3130 alc
= bfd_malloc (len
- 2);
3133 memcpy (alc
, sec
->name
, len
- 3);
3134 alc
[len
- 3] = '\0';
3135 s
= bfd_get_section_by_name (abfd
, alc
);
3139 elf_section_data (s
)->this_hdr
.sh_link
= d
->this_idx
;
3141 /* This is a .stab section. */
3142 if (elf_section_data (s
)->this_hdr
.sh_entsize
== 0)
3143 elf_section_data (s
)->this_hdr
.sh_entsize
3144 = 4 + 2 * bfd_get_arch_size (abfd
) / 8;
3151 case SHT_GNU_verneed
:
3152 case SHT_GNU_verdef
:
3153 /* sh_link is the section header index of the string table
3154 used for the dynamic entries, or the symbol table, or the
3156 s
= bfd_get_section_by_name (abfd
, ".dynstr");
3158 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3161 case SHT_GNU_LIBLIST
:
3162 /* sh_link is the section header index of the prelink library
3164 used for the dynamic entries, or the symbol table, or the
3166 s
= bfd_get_section_by_name (abfd
, (sec
->flags
& SEC_ALLOC
)
3167 ? ".dynstr" : ".gnu.libstr");
3169 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3173 case SHT_GNU_versym
:
3174 /* sh_link is the section header index of the symbol table
3175 this hash table or version table is for. */
3176 s
= bfd_get_section_by_name (abfd
, ".dynsym");
3178 d
->this_hdr
.sh_link
= elf_section_data (s
)->this_idx
;
3182 d
->this_hdr
.sh_link
= t
->symtab_section
;
3186 for (secn
= 1; secn
< section_number
; ++secn
)
3187 if (i_shdrp
[secn
] == NULL
)
3188 i_shdrp
[secn
] = i_shdrp
[0];
3190 i_shdrp
[secn
]->sh_name
= _bfd_elf_strtab_offset (elf_shstrtab (abfd
),
3191 i_shdrp
[secn
]->sh_name
);
3195 /* Map symbol from it's internal number to the external number, moving
3196 all local symbols to be at the head of the list. */
3199 sym_is_global (bfd
*abfd
, asymbol
*sym
)
3201 /* If the backend has a special mapping, use it. */
3202 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3203 if (bed
->elf_backend_sym_is_global
)
3204 return (*bed
->elf_backend_sym_is_global
) (abfd
, sym
);
3206 return ((sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
)) != 0
3207 || bfd_is_und_section (bfd_get_section (sym
))
3208 || bfd_is_com_section (bfd_get_section (sym
)));
3212 elf_map_symbols (bfd
*abfd
)
3214 unsigned int symcount
= bfd_get_symcount (abfd
);
3215 asymbol
**syms
= bfd_get_outsymbols (abfd
);
3216 asymbol
**sect_syms
;
3217 unsigned int num_locals
= 0;
3218 unsigned int num_globals
= 0;
3219 unsigned int num_locals2
= 0;
3220 unsigned int num_globals2
= 0;
3228 fprintf (stderr
, "elf_map_symbols\n");
3232 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3234 if (max_index
< asect
->index
)
3235 max_index
= asect
->index
;
3239 amt
= max_index
* sizeof (asymbol
*);
3240 sect_syms
= bfd_zalloc (abfd
, amt
);
3241 if (sect_syms
== NULL
)
3243 elf_section_syms (abfd
) = sect_syms
;
3244 elf_num_section_syms (abfd
) = max_index
;
3246 /* Init sect_syms entries for any section symbols we have already
3247 decided to output. */
3248 for (idx
= 0; idx
< symcount
; idx
++)
3250 asymbol
*sym
= syms
[idx
];
3252 if ((sym
->flags
& BSF_SECTION_SYM
) != 0
3259 if (sec
->owner
!= NULL
)
3261 if (sec
->owner
!= abfd
)
3263 if (sec
->output_offset
!= 0)
3266 sec
= sec
->output_section
;
3268 /* Empty sections in the input files may have had a
3269 section symbol created for them. (See the comment
3270 near the end of _bfd_generic_link_output_symbols in
3271 linker.c). If the linker script discards such
3272 sections then we will reach this point. Since we know
3273 that we cannot avoid this case, we detect it and skip
3274 the abort and the assignment to the sect_syms array.
3275 To reproduce this particular case try running the
3276 linker testsuite test ld-scripts/weak.exp for an ELF
3277 port that uses the generic linker. */
3278 if (sec
->owner
== NULL
)
3281 BFD_ASSERT (sec
->owner
== abfd
);
3283 sect_syms
[sec
->index
] = syms
[idx
];
3288 /* Classify all of the symbols. */
3289 for (idx
= 0; idx
< symcount
; idx
++)
3291 if (!sym_is_global (abfd
, syms
[idx
]))
3297 /* We will be adding a section symbol for each BFD section. Most normal
3298 sections will already have a section symbol in outsymbols, but
3299 eg. SHT_GROUP sections will not, and we need the section symbol mapped
3300 at least in that case. */
3301 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3303 if (sect_syms
[asect
->index
] == NULL
)
3305 if (!sym_is_global (abfd
, asect
->symbol
))
3312 /* Now sort the symbols so the local symbols are first. */
3313 amt
= (num_locals
+ num_globals
) * sizeof (asymbol
*);
3314 new_syms
= bfd_alloc (abfd
, amt
);
3316 if (new_syms
== NULL
)
3319 for (idx
= 0; idx
< symcount
; idx
++)
3321 asymbol
*sym
= syms
[idx
];
3324 if (!sym_is_global (abfd
, sym
))
3327 i
= num_locals
+ num_globals2
++;
3329 sym
->udata
.i
= i
+ 1;
3331 for (asect
= abfd
->sections
; asect
; asect
= asect
->next
)
3333 if (sect_syms
[asect
->index
] == NULL
)
3335 asymbol
*sym
= asect
->symbol
;
3338 sect_syms
[asect
->index
] = sym
;
3339 if (!sym_is_global (abfd
, sym
))
3342 i
= num_locals
+ num_globals2
++;
3344 sym
->udata
.i
= i
+ 1;
3348 bfd_set_symtab (abfd
, new_syms
, num_locals
+ num_globals
);
3350 elf_num_locals (abfd
) = num_locals
;
3351 elf_num_globals (abfd
) = num_globals
;
3355 /* Align to the maximum file alignment that could be required for any
3356 ELF data structure. */
3358 static inline file_ptr
3359 align_file_position (file_ptr off
, int align
)
3361 return (off
+ align
- 1) & ~(align
- 1);
3364 /* Assign a file position to a section, optionally aligning to the
3365 required section alignment. */
3368 _bfd_elf_assign_file_position_for_section (Elf_Internal_Shdr
*i_shdrp
,
3376 al
= i_shdrp
->sh_addralign
;
3378 offset
= BFD_ALIGN (offset
, al
);
3380 i_shdrp
->sh_offset
= offset
;
3381 if (i_shdrp
->bfd_section
!= NULL
)
3382 i_shdrp
->bfd_section
->filepos
= offset
;
3383 if (i_shdrp
->sh_type
!= SHT_NOBITS
)
3384 offset
+= i_shdrp
->sh_size
;
3388 /* Compute the file positions we are going to put the sections at, and
3389 otherwise prepare to begin writing out the ELF file. If LINK_INFO
3390 is not NULL, this is being called by the ELF backend linker. */
3393 _bfd_elf_compute_section_file_positions (bfd
*abfd
,
3394 struct bfd_link_info
*link_info
)
3396 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3398 struct bfd_strtab_hash
*strtab
= NULL
;
3399 Elf_Internal_Shdr
*shstrtab_hdr
;
3401 if (abfd
->output_has_begun
)
3404 /* Do any elf backend specific processing first. */
3405 if (bed
->elf_backend_begin_write_processing
)
3406 (*bed
->elf_backend_begin_write_processing
) (abfd
, link_info
);
3408 if (! prep_headers (abfd
))
3411 /* Post process the headers if necessary. */
3412 if (bed
->elf_backend_post_process_headers
)
3413 (*bed
->elf_backend_post_process_headers
) (abfd
, link_info
);
3416 bfd_map_over_sections (abfd
, elf_fake_sections
, &failed
);
3420 if (!assign_section_numbers (abfd
, link_info
))
3423 /* The backend linker builds symbol table information itself. */
3424 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3426 /* Non-zero if doing a relocatable link. */
3427 int relocatable_p
= ! (abfd
->flags
& (EXEC_P
| DYNAMIC
));
3429 if (! swap_out_syms (abfd
, &strtab
, relocatable_p
))
3433 if (link_info
== NULL
)
3435 bfd_map_over_sections (abfd
, bfd_elf_set_group_contents
, &failed
);
3440 shstrtab_hdr
= &elf_tdata (abfd
)->shstrtab_hdr
;
3441 /* sh_name was set in prep_headers. */
3442 shstrtab_hdr
->sh_type
= SHT_STRTAB
;
3443 shstrtab_hdr
->sh_flags
= 0;
3444 shstrtab_hdr
->sh_addr
= 0;
3445 shstrtab_hdr
->sh_size
= _bfd_elf_strtab_size (elf_shstrtab (abfd
));
3446 shstrtab_hdr
->sh_entsize
= 0;
3447 shstrtab_hdr
->sh_link
= 0;
3448 shstrtab_hdr
->sh_info
= 0;
3449 /* sh_offset is set in assign_file_positions_except_relocs. */
3450 shstrtab_hdr
->sh_addralign
= 1;
3452 if (!assign_file_positions_except_relocs (abfd
, link_info
))
3455 if (link_info
== NULL
&& bfd_get_symcount (abfd
) > 0)
3458 Elf_Internal_Shdr
*hdr
;
3460 off
= elf_tdata (abfd
)->next_file_pos
;
3462 hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3463 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3465 hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
3466 if (hdr
->sh_size
!= 0)
3467 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3469 hdr
= &elf_tdata (abfd
)->strtab_hdr
;
3470 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
3472 elf_tdata (abfd
)->next_file_pos
= off
;
3474 /* Now that we know where the .strtab section goes, write it
3476 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
3477 || ! _bfd_stringtab_emit (abfd
, strtab
))
3479 _bfd_stringtab_free (strtab
);
3482 abfd
->output_has_begun
= TRUE
;
3487 /* Create a mapping from a set of sections to a program segment. */
3489 static struct elf_segment_map
*
3490 make_mapping (bfd
*abfd
,
3491 asection
**sections
,
3496 struct elf_segment_map
*m
;
3501 amt
= sizeof (struct elf_segment_map
);
3502 amt
+= (to
- from
- 1) * sizeof (asection
*);
3503 m
= bfd_zalloc (abfd
, amt
);
3507 m
->p_type
= PT_LOAD
;
3508 for (i
= from
, hdrpp
= sections
+ from
; i
< to
; i
++, hdrpp
++)
3509 m
->sections
[i
- from
] = *hdrpp
;
3510 m
->count
= to
- from
;
3512 if (from
== 0 && phdr
)
3514 /* Include the headers in the first PT_LOAD segment. */
3515 m
->includes_filehdr
= 1;
3516 m
->includes_phdrs
= 1;
3522 /* Create the PT_DYNAMIC segment, which includes DYNSEC. Returns NULL
3525 struct elf_segment_map
*
3526 _bfd_elf_make_dynamic_segment (bfd
*abfd
, asection
*dynsec
)
3528 struct elf_segment_map
*m
;
3530 m
= bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3534 m
->p_type
= PT_DYNAMIC
;
3536 m
->sections
[0] = dynsec
;
3541 /* Set up a mapping from BFD sections to program segments. */
3544 map_sections_to_segments (bfd
*abfd
)
3546 asection
**sections
= NULL
;
3550 struct elf_segment_map
*mfirst
;
3551 struct elf_segment_map
**pm
;
3552 struct elf_segment_map
*m
;
3555 unsigned int phdr_index
;
3556 bfd_vma maxpagesize
;
3558 bfd_boolean phdr_in_segment
= TRUE
;
3559 bfd_boolean writable
;
3561 asection
*first_tls
= NULL
;
3562 asection
*dynsec
, *eh_frame_hdr
;
3565 if (elf_tdata (abfd
)->segment_map
!= NULL
)
3568 if (bfd_count_sections (abfd
) == 0)
3571 /* Select the allocated sections, and sort them. */
3573 amt
= bfd_count_sections (abfd
) * sizeof (asection
*);
3574 sections
= bfd_malloc (amt
);
3575 if (sections
== NULL
)
3579 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3581 if ((s
->flags
& SEC_ALLOC
) != 0)
3587 BFD_ASSERT (i
<= bfd_count_sections (abfd
));
3590 qsort (sections
, (size_t) count
, sizeof (asection
*), elf_sort_sections
);
3592 /* Build the mapping. */
3597 /* If we have a .interp section, then create a PT_PHDR segment for
3598 the program headers and a PT_INTERP segment for the .interp
3600 s
= bfd_get_section_by_name (abfd
, ".interp");
3601 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
3603 amt
= sizeof (struct elf_segment_map
);
3604 m
= bfd_zalloc (abfd
, amt
);
3608 m
->p_type
= PT_PHDR
;
3609 /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
3610 m
->p_flags
= PF_R
| PF_X
;
3611 m
->p_flags_valid
= 1;
3612 m
->includes_phdrs
= 1;
3617 amt
= sizeof (struct elf_segment_map
);
3618 m
= bfd_zalloc (abfd
, amt
);
3622 m
->p_type
= PT_INTERP
;
3630 /* Look through the sections. We put sections in the same program
3631 segment when the start of the second section can be placed within
3632 a few bytes of the end of the first section. */
3636 maxpagesize
= get_elf_backend_data (abfd
)->maxpagesize
;
3638 dynsec
= bfd_get_section_by_name (abfd
, ".dynamic");
3640 && (dynsec
->flags
& SEC_LOAD
) == 0)
3643 /* Deal with -Ttext or something similar such that the first section
3644 is not adjacent to the program headers. This is an
3645 approximation, since at this point we don't know exactly how many
3646 program headers we will need. */
3649 bfd_size_type phdr_size
;
3651 phdr_size
= elf_tdata (abfd
)->program_header_size
;
3653 phdr_size
= get_elf_backend_data (abfd
)->s
->sizeof_phdr
;
3654 if ((abfd
->flags
& D_PAGED
) == 0
3655 || sections
[0]->lma
< phdr_size
3656 || sections
[0]->lma
% maxpagesize
< phdr_size
% maxpagesize
)
3657 phdr_in_segment
= FALSE
;
3660 for (i
= 0, hdrpp
= sections
; i
< count
; i
++, hdrpp
++)
3663 bfd_boolean new_segment
;
3667 /* See if this section and the last one will fit in the same
3670 if (last_hdr
== NULL
)
3672 /* If we don't have a segment yet, then we don't need a new
3673 one (we build the last one after this loop). */
3674 new_segment
= FALSE
;
3676 else if (last_hdr
->lma
- last_hdr
->vma
!= hdr
->lma
- hdr
->vma
)
3678 /* If this section has a different relation between the
3679 virtual address and the load address, then we need a new
3683 else if (BFD_ALIGN (last_hdr
->lma
+ last_size
, maxpagesize
)
3684 < BFD_ALIGN (hdr
->lma
, maxpagesize
))
3686 /* If putting this section in this segment would force us to
3687 skip a page in the segment, then we need a new segment. */
3690 else if ((last_hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) == 0
3691 && (hdr
->flags
& (SEC_LOAD
| SEC_THREAD_LOCAL
)) != 0)
3693 /* We don't want to put a loadable section after a
3694 nonloadable section in the same segment.
3695 Consider .tbss sections as loadable for this purpose. */
3698 else if ((abfd
->flags
& D_PAGED
) == 0)
3700 /* If the file is not demand paged, which means that we
3701 don't require the sections to be correctly aligned in the
3702 file, then there is no other reason for a new segment. */
3703 new_segment
= FALSE
;
3706 && (hdr
->flags
& SEC_READONLY
) == 0
3707 && (((last_hdr
->lma
+ last_size
- 1)
3708 & ~(maxpagesize
- 1))
3709 != (hdr
->lma
& ~(maxpagesize
- 1))))
3711 /* We don't want to put a writable section in a read only
3712 segment, unless they are on the same page in memory
3713 anyhow. We already know that the last section does not
3714 bring us past the current section on the page, so the
3715 only case in which the new section is not on the same
3716 page as the previous section is when the previous section
3717 ends precisely on a page boundary. */
3722 /* Otherwise, we can use the same segment. */
3723 new_segment
= FALSE
;
3728 if ((hdr
->flags
& SEC_READONLY
) == 0)
3731 /* .tbss sections effectively have zero size. */
3732 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3733 last_size
= hdr
->size
;
3739 /* We need a new program segment. We must create a new program
3740 header holding all the sections from phdr_index until hdr. */
3742 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3749 if ((hdr
->flags
& SEC_READONLY
) == 0)
3755 /* .tbss sections effectively have zero size. */
3756 if ((hdr
->flags
& (SEC_THREAD_LOCAL
| SEC_LOAD
)) != SEC_THREAD_LOCAL
)
3757 last_size
= hdr
->size
;
3761 phdr_in_segment
= FALSE
;
3764 /* Create a final PT_LOAD program segment. */
3765 if (last_hdr
!= NULL
)
3767 m
= make_mapping (abfd
, sections
, phdr_index
, i
, phdr_in_segment
);
3775 /* If there is a .dynamic section, throw in a PT_DYNAMIC segment. */
3778 m
= _bfd_elf_make_dynamic_segment (abfd
, dynsec
);
3785 /* For each loadable .note section, add a PT_NOTE segment. We don't
3786 use bfd_get_section_by_name, because if we link together
3787 nonloadable .note sections and loadable .note sections, we will
3788 generate two .note sections in the output file. FIXME: Using
3789 names for section types is bogus anyhow. */
3790 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
3792 if ((s
->flags
& SEC_LOAD
) != 0
3793 && strncmp (s
->name
, ".note", 5) == 0)
3795 amt
= sizeof (struct elf_segment_map
);
3796 m
= bfd_zalloc (abfd
, amt
);
3800 m
->p_type
= PT_NOTE
;
3807 if (s
->flags
& SEC_THREAD_LOCAL
)
3815 /* If there are any SHF_TLS output sections, add PT_TLS segment. */
3820 amt
= sizeof (struct elf_segment_map
);
3821 amt
+= (tls_count
- 1) * sizeof (asection
*);
3822 m
= bfd_zalloc (abfd
, amt
);
3827 m
->count
= tls_count
;
3828 /* Mandated PF_R. */
3830 m
->p_flags_valid
= 1;
3831 for (i
= 0; i
< tls_count
; ++i
)
3833 BFD_ASSERT (first_tls
->flags
& SEC_THREAD_LOCAL
);
3834 m
->sections
[i
] = first_tls
;
3835 first_tls
= first_tls
->next
;
3842 /* If there is a .eh_frame_hdr section, throw in a PT_GNU_EH_FRAME
3844 eh_frame_hdr
= elf_tdata (abfd
)->eh_frame_hdr
;
3845 if (eh_frame_hdr
!= NULL
3846 && (eh_frame_hdr
->output_section
->flags
& SEC_LOAD
) != 0)
3848 amt
= sizeof (struct elf_segment_map
);
3849 m
= bfd_zalloc (abfd
, amt
);
3853 m
->p_type
= PT_GNU_EH_FRAME
;
3855 m
->sections
[0] = eh_frame_hdr
->output_section
;
3861 if (elf_tdata (abfd
)->stack_flags
)
3863 amt
= sizeof (struct elf_segment_map
);
3864 m
= bfd_zalloc (abfd
, amt
);
3868 m
->p_type
= PT_GNU_STACK
;
3869 m
->p_flags
= elf_tdata (abfd
)->stack_flags
;
3870 m
->p_flags_valid
= 1;
3876 if (elf_tdata (abfd
)->relro
)
3878 amt
= sizeof (struct elf_segment_map
);
3879 m
= bfd_zalloc (abfd
, amt
);
3883 m
->p_type
= PT_GNU_RELRO
;
3885 m
->p_flags_valid
= 1;
3894 elf_tdata (abfd
)->segment_map
= mfirst
;
3898 if (sections
!= NULL
)
3903 /* Sort sections by address. */
3906 elf_sort_sections (const void *arg1
, const void *arg2
)
3908 const asection
*sec1
= *(const asection
**) arg1
;
3909 const asection
*sec2
= *(const asection
**) arg2
;
3910 bfd_size_type size1
, size2
;
3912 /* Sort by LMA first, since this is the address used to
3913 place the section into a segment. */
3914 if (sec1
->lma
< sec2
->lma
)
3916 else if (sec1
->lma
> sec2
->lma
)
3919 /* Then sort by VMA. Normally the LMA and the VMA will be
3920 the same, and this will do nothing. */
3921 if (sec1
->vma
< sec2
->vma
)
3923 else if (sec1
->vma
> sec2
->vma
)
3926 /* Put !SEC_LOAD sections after SEC_LOAD ones. */
3928 #define TOEND(x) (((x)->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0)
3934 /* If the indicies are the same, do not return 0
3935 here, but continue to try the next comparison. */
3936 if (sec1
->target_index
- sec2
->target_index
!= 0)
3937 return sec1
->target_index
- sec2
->target_index
;
3942 else if (TOEND (sec2
))
3947 /* Sort by size, to put zero sized sections
3948 before others at the same address. */
3950 size1
= (sec1
->flags
& SEC_LOAD
) ? sec1
->size
: 0;
3951 size2
= (sec2
->flags
& SEC_LOAD
) ? sec2
->size
: 0;
3958 return sec1
->target_index
- sec2
->target_index
;
3961 /* Ian Lance Taylor writes:
3963 We shouldn't be using % with a negative signed number. That's just
3964 not good. We have to make sure either that the number is not
3965 negative, or that the number has an unsigned type. When the types
3966 are all the same size they wind up as unsigned. When file_ptr is a
3967 larger signed type, the arithmetic winds up as signed long long,
3970 What we're trying to say here is something like ``increase OFF by
3971 the least amount that will cause it to be equal to the VMA modulo
3973 /* In other words, something like:
3975 vma_offset = m->sections[0]->vma % bed->maxpagesize;
3976 off_offset = off % bed->maxpagesize;
3977 if (vma_offset < off_offset)
3978 adjustment = vma_offset + bed->maxpagesize - off_offset;
3980 adjustment = vma_offset - off_offset;
3982 which can can be collapsed into the expression below. */
3985 vma_page_aligned_bias (bfd_vma vma
, ufile_ptr off
, bfd_vma maxpagesize
)
3987 return ((vma
- off
) % maxpagesize
);
3990 /* Assign file positions to the sections based on the mapping from
3991 sections to segments. This function also sets up some fields in
3992 the file header, and writes out the program headers. */
3995 assign_file_positions_for_segments (bfd
*abfd
, struct bfd_link_info
*link_info
)
3997 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3999 struct elf_segment_map
*m
;
4001 Elf_Internal_Phdr
*phdrs
;
4003 bfd_vma filehdr_vaddr
, filehdr_paddr
;
4004 bfd_vma phdrs_vaddr
, phdrs_paddr
;
4005 Elf_Internal_Phdr
*p
;
4008 if (elf_tdata (abfd
)->segment_map
== NULL
)
4010 if (! map_sections_to_segments (abfd
))
4015 /* The placement algorithm assumes that non allocated sections are
4016 not in PT_LOAD segments. We ensure this here by removing such
4017 sections from the segment map. */
4018 for (m
= elf_tdata (abfd
)->segment_map
;
4022 unsigned int new_count
;
4025 if (m
->p_type
!= PT_LOAD
)
4029 for (i
= 0; i
< m
->count
; i
++)
4031 if ((m
->sections
[i
]->flags
& SEC_ALLOC
) != 0)
4034 m
->sections
[new_count
] = m
->sections
[i
];
4040 if (new_count
!= m
->count
)
4041 m
->count
= new_count
;
4045 if (bed
->elf_backend_modify_segment_map
)
4047 if (! (*bed
->elf_backend_modify_segment_map
) (abfd
, link_info
))
4052 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4055 elf_elfheader (abfd
)->e_phoff
= bed
->s
->sizeof_ehdr
;
4056 elf_elfheader (abfd
)->e_phentsize
= bed
->s
->sizeof_phdr
;
4057 elf_elfheader (abfd
)->e_phnum
= count
;
4061 elf_tdata (abfd
)->next_file_pos
= bed
->s
->sizeof_ehdr
;
4065 /* If we already counted the number of program segments, make sure
4066 that we allocated enough space. This happens when SIZEOF_HEADERS
4067 is used in a linker script. */
4068 alloc
= elf_tdata (abfd
)->program_header_size
/ bed
->s
->sizeof_phdr
;
4069 if (alloc
!= 0 && count
> alloc
)
4071 ((*_bfd_error_handler
)
4072 (_("%B: Not enough room for program headers (allocated %u, need %u)"),
4073 abfd
, alloc
, count
));
4074 bfd_set_error (bfd_error_bad_value
);
4081 amt
= alloc
* sizeof (Elf_Internal_Phdr
);
4082 phdrs
= bfd_alloc (abfd
, amt
);
4086 off
= bed
->s
->sizeof_ehdr
;
4087 off
+= alloc
* bed
->s
->sizeof_phdr
;
4094 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4101 /* If elf_segment_map is not from map_sections_to_segments, the
4102 sections may not be correctly ordered. NOTE: sorting should
4103 not be done to the PT_NOTE section of a corefile, which may
4104 contain several pseudo-sections artificially created by bfd.
4105 Sorting these pseudo-sections breaks things badly. */
4107 && !(elf_elfheader (abfd
)->e_type
== ET_CORE
4108 && m
->p_type
== PT_NOTE
))
4109 qsort (m
->sections
, (size_t) m
->count
, sizeof (asection
*),
4112 /* An ELF segment (described by Elf_Internal_Phdr) may contain a
4113 number of sections with contents contributing to both p_filesz
4114 and p_memsz, followed by a number of sections with no contents
4115 that just contribute to p_memsz. In this loop, OFF tracks next
4116 available file offset for PT_LOAD and PT_NOTE segments. VOFF is
4117 an adjustment we use for segments that have no file contents
4118 but need zero filled memory allocation. */
4120 p
->p_type
= m
->p_type
;
4121 p
->p_flags
= m
->p_flags
;
4123 if (p
->p_type
== PT_LOAD
4126 bfd_size_type align
;
4129 if ((abfd
->flags
& D_PAGED
) != 0)
4130 align
= bed
->maxpagesize
;
4133 unsigned int align_power
= 0;
4134 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4136 unsigned int secalign
;
4138 secalign
= bfd_get_section_alignment (abfd
, *secpp
);
4139 if (secalign
> align_power
)
4140 align_power
= secalign
;
4142 align
= (bfd_size_type
) 1 << align_power
;
4145 adjust
= vma_page_aligned_bias (m
->sections
[0]->vma
, off
, align
);
4148 && !m
->includes_filehdr
4149 && !m
->includes_phdrs
4150 && (ufile_ptr
) off
>= align
)
4152 /* If the first section isn't loadable, the same holds for
4153 any other sections. Since the segment won't need file
4154 space, we can make p_offset overlap some prior segment.
4155 However, .tbss is special. If a segment starts with
4156 .tbss, we need to look at the next section to decide
4157 whether the segment has any loadable sections. */
4159 while ((m
->sections
[i
]->flags
& SEC_LOAD
) == 0)
4161 if ((m
->sections
[i
]->flags
& SEC_THREAD_LOCAL
) == 0
4165 voff
= adjust
- align
;
4171 /* Make sure the .dynamic section is the first section in the
4172 PT_DYNAMIC segment. */
4173 else if (p
->p_type
== PT_DYNAMIC
4175 && strcmp (m
->sections
[0]->name
, ".dynamic") != 0)
4178 (_("%B: The first section in the PT_DYNAMIC segment is not the .dynamic section"),
4180 bfd_set_error (bfd_error_bad_value
);
4187 p
->p_vaddr
= m
->sections
[0]->vma
;
4189 if (m
->p_paddr_valid
)
4190 p
->p_paddr
= m
->p_paddr
;
4191 else if (m
->count
== 0)
4194 p
->p_paddr
= m
->sections
[0]->lma
;
4196 if (p
->p_type
== PT_LOAD
4197 && (abfd
->flags
& D_PAGED
) != 0)
4198 p
->p_align
= bed
->maxpagesize
;
4199 else if (m
->count
== 0)
4200 p
->p_align
= 1 << bed
->s
->log_file_align
;
4208 if (m
->includes_filehdr
)
4210 if (! m
->p_flags_valid
)
4213 p
->p_filesz
= bed
->s
->sizeof_ehdr
;
4214 p
->p_memsz
= bed
->s
->sizeof_ehdr
;
4217 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4219 if (p
->p_vaddr
< (bfd_vma
) off
)
4221 (*_bfd_error_handler
)
4222 (_("%B: Not enough room for program headers, try linking with -N"),
4224 bfd_set_error (bfd_error_bad_value
);
4229 if (! m
->p_paddr_valid
)
4232 if (p
->p_type
== PT_LOAD
)
4234 filehdr_vaddr
= p
->p_vaddr
;
4235 filehdr_paddr
= p
->p_paddr
;
4239 if (m
->includes_phdrs
)
4241 if (! m
->p_flags_valid
)
4244 if (m
->includes_filehdr
)
4246 if (p
->p_type
== PT_LOAD
)
4248 phdrs_vaddr
= p
->p_vaddr
+ bed
->s
->sizeof_ehdr
;
4249 phdrs_paddr
= p
->p_paddr
+ bed
->s
->sizeof_ehdr
;
4254 p
->p_offset
= bed
->s
->sizeof_ehdr
;
4258 BFD_ASSERT (p
->p_type
== PT_LOAD
);
4259 p
->p_vaddr
-= off
- p
->p_offset
;
4260 if (! m
->p_paddr_valid
)
4261 p
->p_paddr
-= off
- p
->p_offset
;
4264 if (p
->p_type
== PT_LOAD
)
4266 phdrs_vaddr
= p
->p_vaddr
;
4267 phdrs_paddr
= p
->p_paddr
;
4270 phdrs_vaddr
= bed
->maxpagesize
+ bed
->s
->sizeof_ehdr
;
4273 p
->p_filesz
+= alloc
* bed
->s
->sizeof_phdr
;
4274 p
->p_memsz
+= alloc
* bed
->s
->sizeof_phdr
;
4277 if (p
->p_type
== PT_LOAD
4278 || (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
))
4280 if (! m
->includes_filehdr
&& ! m
->includes_phdrs
)
4281 p
->p_offset
= off
+ voff
;
4286 adjust
= off
- (p
->p_offset
+ p
->p_filesz
);
4287 p
->p_filesz
+= adjust
;
4288 p
->p_memsz
+= adjust
;
4292 for (i
= 0, secpp
= m
->sections
; i
< m
->count
; i
++, secpp
++)
4296 bfd_size_type align
;
4300 align
= 1 << bfd_get_section_alignment (abfd
, sec
);
4302 if (p
->p_type
== PT_LOAD
4303 || p
->p_type
== PT_TLS
)
4305 bfd_signed_vma adjust
;
4307 if ((flags
& SEC_LOAD
) != 0)
4309 adjust
= sec
->lma
- (p
->p_paddr
+ p
->p_filesz
);
4312 (*_bfd_error_handler
)
4313 (_("%B: section %A lma 0x%lx overlaps previous sections"),
4314 abfd
, sec
, (unsigned long) sec
->lma
);
4318 p
->p_filesz
+= adjust
;
4319 p
->p_memsz
+= adjust
;
4321 /* .tbss is special. It doesn't contribute to p_memsz of
4323 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4324 || p
->p_type
== PT_TLS
)
4326 /* The section VMA must equal the file position
4327 modulo the page size. */
4328 bfd_size_type page
= align
;
4329 if ((abfd
->flags
& D_PAGED
) != 0)
4330 page
= bed
->maxpagesize
;
4331 adjust
= vma_page_aligned_bias (sec
->vma
,
4332 p
->p_vaddr
+ p
->p_memsz
,
4334 p
->p_memsz
+= adjust
;
4338 if (p
->p_type
== PT_NOTE
&& bfd_get_format (abfd
) == bfd_core
)
4340 /* The section at i == 0 is the one that actually contains
4346 p
->p_filesz
= sec
->size
;
4352 /* The rest are fake sections that shouldn't be written. */
4361 if (p
->p_type
== PT_LOAD
)
4364 /* FIXME: The SEC_HAS_CONTENTS test here dates back to
4365 1997, and the exact reason for it isn't clear. One
4366 plausible explanation is that it is to work around
4367 a problem we have with linker scripts using data
4368 statements in NOLOAD sections. I don't think it
4369 makes a great deal of sense to have such a section
4370 assigned to a PT_LOAD segment, but apparently
4371 people do this. The data statement results in a
4372 bfd_data_link_order being built, and these need
4373 section contents to write into. Eventually, we get
4374 to _bfd_elf_write_object_contents which writes any
4375 section with contents to the output. Make room
4376 here for the write, so that following segments are
4378 if ((flags
& SEC_LOAD
) != 0
4379 || (flags
& SEC_HAS_CONTENTS
) != 0)
4383 if ((flags
& SEC_LOAD
) != 0)
4385 p
->p_filesz
+= sec
->size
;
4386 p
->p_memsz
+= sec
->size
;
4388 /* PR ld/594: Sections in note segments which are not loaded
4389 contribute to the file size but not the in-memory size. */
4390 else if (p
->p_type
== PT_NOTE
4391 && (flags
& SEC_HAS_CONTENTS
) != 0)
4392 p
->p_filesz
+= sec
->size
;
4394 /* .tbss is special. It doesn't contribute to p_memsz of
4396 else if ((flags
& SEC_THREAD_LOCAL
) == 0
4397 || p
->p_type
== PT_TLS
)
4398 p
->p_memsz
+= sec
->size
;
4400 if (p
->p_type
== PT_TLS
4402 && (sec
->flags
& SEC_HAS_CONTENTS
) == 0)
4404 struct bfd_link_order
*o
;
4405 bfd_vma tbss_size
= 0;
4407 for (o
= sec
->map_head
.link_order
; o
!= NULL
; o
= o
->next
)
4408 if (tbss_size
< o
->offset
+ o
->size
)
4409 tbss_size
= o
->offset
+ o
->size
;
4411 p
->p_memsz
+= tbss_size
;
4414 if (align
> p
->p_align
4415 && (p
->p_type
!= PT_LOAD
|| (abfd
->flags
& D_PAGED
) == 0))
4419 if (! m
->p_flags_valid
)
4422 if ((flags
& SEC_CODE
) != 0)
4424 if ((flags
& SEC_READONLY
) == 0)
4430 /* Now that we have set the section file positions, we can set up
4431 the file positions for the non PT_LOAD segments. */
4432 for (m
= elf_tdata (abfd
)->segment_map
, p
= phdrs
;
4436 if (p
->p_type
!= PT_LOAD
&& m
->count
> 0)
4438 BFD_ASSERT (! m
->includes_filehdr
&& ! m
->includes_phdrs
);
4439 /* If the section has not yet been assigned a file position,
4440 do so now. The ARM BPABI requires that .dynamic section
4441 not be marked SEC_ALLOC because it is not part of any
4442 PT_LOAD segment, so it will not be processed above. */
4443 if (p
->p_type
== PT_DYNAMIC
&& m
->sections
[0]->filepos
== 0)
4446 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4449 while (i_shdrpp
[i
]->bfd_section
!= m
->sections
[0])
4451 off
= (_bfd_elf_assign_file_position_for_section
4452 (i_shdrpp
[i
], off
, TRUE
));
4453 p
->p_filesz
= m
->sections
[0]->size
;
4455 p
->p_offset
= m
->sections
[0]->filepos
;
4459 if (m
->includes_filehdr
)
4461 p
->p_vaddr
= filehdr_vaddr
;
4462 if (! m
->p_paddr_valid
)
4463 p
->p_paddr
= filehdr_paddr
;
4465 else if (m
->includes_phdrs
)
4467 p
->p_vaddr
= phdrs_vaddr
;
4468 if (! m
->p_paddr_valid
)
4469 p
->p_paddr
= phdrs_paddr
;
4471 else if (p
->p_type
== PT_GNU_RELRO
)
4473 Elf_Internal_Phdr
*lp
;
4475 for (lp
= phdrs
; lp
< phdrs
+ count
; ++lp
)
4477 if (lp
->p_type
== PT_LOAD
4478 && lp
->p_vaddr
<= link_info
->relro_end
4479 && lp
->p_vaddr
>= link_info
->relro_start
4480 && lp
->p_vaddr
+ lp
->p_filesz
4481 >= link_info
->relro_end
)
4485 if (lp
< phdrs
+ count
4486 && link_info
->relro_end
> lp
->p_vaddr
)
4488 p
->p_vaddr
= lp
->p_vaddr
;
4489 p
->p_paddr
= lp
->p_paddr
;
4490 p
->p_offset
= lp
->p_offset
;
4491 p
->p_filesz
= link_info
->relro_end
- lp
->p_vaddr
;
4492 p
->p_memsz
= p
->p_filesz
;
4494 p
->p_flags
= (lp
->p_flags
& ~PF_W
);
4498 memset (p
, 0, sizeof *p
);
4499 p
->p_type
= PT_NULL
;
4505 /* Clear out any program headers we allocated but did not use. */
4506 for (; count
< alloc
; count
++, p
++)
4508 memset (p
, 0, sizeof *p
);
4509 p
->p_type
= PT_NULL
;
4512 elf_tdata (abfd
)->phdr
= phdrs
;
4514 elf_tdata (abfd
)->next_file_pos
= off
;
4516 /* Write out the program headers. */
4517 if (bfd_seek (abfd
, (bfd_signed_vma
) bed
->s
->sizeof_ehdr
, SEEK_SET
) != 0
4518 || bed
->s
->write_out_phdrs (abfd
, phdrs
, alloc
) != 0)
4524 /* Get the size of the program header.
4526 If this is called by the linker before any of the section VMA's are set, it
4527 can't calculate the correct value for a strange memory layout. This only
4528 happens when SIZEOF_HEADERS is used in a linker script. In this case,
4529 SORTED_HDRS is NULL and we assume the normal scenario of one text and one
4530 data segment (exclusive of .interp and .dynamic).
4532 ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
4533 will be two segments. */
4535 static bfd_size_type
4536 get_program_header_size (bfd
*abfd
)
4540 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4542 /* We can't return a different result each time we're called. */
4543 if (elf_tdata (abfd
)->program_header_size
!= 0)
4544 return elf_tdata (abfd
)->program_header_size
;
4546 if (elf_tdata (abfd
)->segment_map
!= NULL
)
4548 struct elf_segment_map
*m
;
4551 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
4553 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4554 return elf_tdata (abfd
)->program_header_size
;
4557 /* Assume we will need exactly two PT_LOAD segments: one for text
4558 and one for data. */
4561 s
= bfd_get_section_by_name (abfd
, ".interp");
4562 if (s
!= NULL
&& (s
->flags
& SEC_LOAD
) != 0)
4564 /* If we have a loadable interpreter section, we need a
4565 PT_INTERP segment. In this case, assume we also need a
4566 PT_PHDR segment, although that may not be true for all
4571 if (bfd_get_section_by_name (abfd
, ".dynamic") != NULL
)
4573 /* We need a PT_DYNAMIC segment. */
4577 if (elf_tdata (abfd
)->eh_frame_hdr
)
4579 /* We need a PT_GNU_EH_FRAME segment. */
4583 if (elf_tdata (abfd
)->stack_flags
)
4585 /* We need a PT_GNU_STACK segment. */
4589 if (elf_tdata (abfd
)->relro
)
4591 /* We need a PT_GNU_RELRO segment. */
4595 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4597 if ((s
->flags
& SEC_LOAD
) != 0
4598 && strncmp (s
->name
, ".note", 5) == 0)
4600 /* We need a PT_NOTE segment. */
4605 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
4607 if (s
->flags
& SEC_THREAD_LOCAL
)
4609 /* We need a PT_TLS segment. */
4615 /* Let the backend count up any program headers it might need. */
4616 if (bed
->elf_backend_additional_program_headers
)
4620 a
= (*bed
->elf_backend_additional_program_headers
) (abfd
);
4626 elf_tdata (abfd
)->program_header_size
= segs
* bed
->s
->sizeof_phdr
;
4627 return elf_tdata (abfd
)->program_header_size
;
4630 /* Work out the file positions of all the sections. This is called by
4631 _bfd_elf_compute_section_file_positions. All the section sizes and
4632 VMAs must be known before this is called.
4634 Reloc sections come in two flavours: Those processed specially as
4635 "side-channel" data attached to a section to which they apply, and
4636 those that bfd doesn't process as relocations. The latter sort are
4637 stored in a normal bfd section by bfd_section_from_shdr. We don't
4638 consider the former sort here, unless they form part of the loadable
4639 image. Reloc sections not assigned here will be handled later by
4640 assign_file_positions_for_relocs.
4642 We also don't set the positions of the .symtab and .strtab here. */
4645 assign_file_positions_except_relocs (bfd
*abfd
,
4646 struct bfd_link_info
*link_info
)
4648 struct elf_obj_tdata
* const tdata
= elf_tdata (abfd
);
4649 Elf_Internal_Ehdr
* const i_ehdrp
= elf_elfheader (abfd
);
4650 Elf_Internal_Shdr
** const i_shdrpp
= elf_elfsections (abfd
);
4651 unsigned int num_sec
= elf_numsections (abfd
);
4653 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4655 if ((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0
4656 && bfd_get_format (abfd
) != bfd_core
)
4658 Elf_Internal_Shdr
**hdrpp
;
4661 /* Start after the ELF header. */
4662 off
= i_ehdrp
->e_ehsize
;
4664 /* We are not creating an executable, which means that we are
4665 not creating a program header, and that the actual order of
4666 the sections in the file is unimportant. */
4667 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4669 Elf_Internal_Shdr
*hdr
;
4672 if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4673 && hdr
->bfd_section
== NULL
)
4674 || i
== tdata
->symtab_section
4675 || i
== tdata
->symtab_shndx_section
4676 || i
== tdata
->strtab_section
)
4678 hdr
->sh_offset
= -1;
4681 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4683 if (i
== SHN_LORESERVE
- 1)
4685 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4686 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4693 Elf_Internal_Shdr
**hdrpp
;
4695 /* Assign file positions for the loaded sections based on the
4696 assignment of sections to segments. */
4697 if (! assign_file_positions_for_segments (abfd
, link_info
))
4700 /* Assign file positions for the other sections. */
4702 off
= elf_tdata (abfd
)->next_file_pos
;
4703 for (i
= 1, hdrpp
= i_shdrpp
+ 1; i
< num_sec
; i
++, hdrpp
++)
4705 Elf_Internal_Shdr
*hdr
;
4708 if (hdr
->bfd_section
!= NULL
4709 && hdr
->bfd_section
->filepos
!= 0)
4710 hdr
->sh_offset
= hdr
->bfd_section
->filepos
;
4711 else if ((hdr
->sh_flags
& SHF_ALLOC
) != 0)
4713 ((*_bfd_error_handler
)
4714 (_("%B: warning: allocated section `%s' not in segment"),
4716 (hdr
->bfd_section
== NULL
4718 : hdr
->bfd_section
->name
)));
4719 if ((abfd
->flags
& D_PAGED
) != 0)
4720 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4723 off
+= vma_page_aligned_bias (hdr
->sh_addr
, off
,
4725 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
,
4728 else if (((hdr
->sh_type
== SHT_REL
|| hdr
->sh_type
== SHT_RELA
)
4729 && hdr
->bfd_section
== NULL
)
4730 || hdr
== i_shdrpp
[tdata
->symtab_section
]
4731 || hdr
== i_shdrpp
[tdata
->symtab_shndx_section
]
4732 || hdr
== i_shdrpp
[tdata
->strtab_section
])
4733 hdr
->sh_offset
= -1;
4735 off
= _bfd_elf_assign_file_position_for_section (hdr
, off
, TRUE
);
4737 if (i
== SHN_LORESERVE
- 1)
4739 i
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4740 hdrpp
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4745 /* Place the section headers. */
4746 off
= align_file_position (off
, 1 << bed
->s
->log_file_align
);
4747 i_ehdrp
->e_shoff
= off
;
4748 off
+= i_ehdrp
->e_shnum
* i_ehdrp
->e_shentsize
;
4750 elf_tdata (abfd
)->next_file_pos
= off
;
4756 prep_headers (bfd
*abfd
)
4758 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
4759 Elf_Internal_Phdr
*i_phdrp
= 0; /* Program header table, internal form */
4760 Elf_Internal_Shdr
**i_shdrp
; /* Section header table, internal form */
4761 struct elf_strtab_hash
*shstrtab
;
4762 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4764 i_ehdrp
= elf_elfheader (abfd
);
4765 i_shdrp
= elf_elfsections (abfd
);
4767 shstrtab
= _bfd_elf_strtab_init ();
4768 if (shstrtab
== NULL
)
4771 elf_shstrtab (abfd
) = shstrtab
;
4773 i_ehdrp
->e_ident
[EI_MAG0
] = ELFMAG0
;
4774 i_ehdrp
->e_ident
[EI_MAG1
] = ELFMAG1
;
4775 i_ehdrp
->e_ident
[EI_MAG2
] = ELFMAG2
;
4776 i_ehdrp
->e_ident
[EI_MAG3
] = ELFMAG3
;
4778 i_ehdrp
->e_ident
[EI_CLASS
] = bed
->s
->elfclass
;
4779 i_ehdrp
->e_ident
[EI_DATA
] =
4780 bfd_big_endian (abfd
) ? ELFDATA2MSB
: ELFDATA2LSB
;
4781 i_ehdrp
->e_ident
[EI_VERSION
] = bed
->s
->ev_current
;
4783 if ((abfd
->flags
& DYNAMIC
) != 0)
4784 i_ehdrp
->e_type
= ET_DYN
;
4785 else if ((abfd
->flags
& EXEC_P
) != 0)
4786 i_ehdrp
->e_type
= ET_EXEC
;
4787 else if (bfd_get_format (abfd
) == bfd_core
)
4788 i_ehdrp
->e_type
= ET_CORE
;
4790 i_ehdrp
->e_type
= ET_REL
;
4792 switch (bfd_get_arch (abfd
))
4794 case bfd_arch_unknown
:
4795 i_ehdrp
->e_machine
= EM_NONE
;
4798 /* There used to be a long list of cases here, each one setting
4799 e_machine to the same EM_* macro #defined as ELF_MACHINE_CODE
4800 in the corresponding bfd definition. To avoid duplication,
4801 the switch was removed. Machines that need special handling
4802 can generally do it in elf_backend_final_write_processing(),
4803 unless they need the information earlier than the final write.
4804 Such need can generally be supplied by replacing the tests for
4805 e_machine with the conditions used to determine it. */
4807 i_ehdrp
->e_machine
= bed
->elf_machine_code
;
4810 i_ehdrp
->e_version
= bed
->s
->ev_current
;
4811 i_ehdrp
->e_ehsize
= bed
->s
->sizeof_ehdr
;
4813 /* No program header, for now. */
4814 i_ehdrp
->e_phoff
= 0;
4815 i_ehdrp
->e_phentsize
= 0;
4816 i_ehdrp
->e_phnum
= 0;
4818 /* Each bfd section is section header entry. */
4819 i_ehdrp
->e_entry
= bfd_get_start_address (abfd
);
4820 i_ehdrp
->e_shentsize
= bed
->s
->sizeof_shdr
;
4822 /* If we're building an executable, we'll need a program header table. */
4823 if (abfd
->flags
& EXEC_P
)
4824 /* It all happens later. */
4828 i_ehdrp
->e_phentsize
= 0;
4830 i_ehdrp
->e_phoff
= 0;
4833 elf_tdata (abfd
)->symtab_hdr
.sh_name
=
4834 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".symtab", FALSE
);
4835 elf_tdata (abfd
)->strtab_hdr
.sh_name
=
4836 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".strtab", FALSE
);
4837 elf_tdata (abfd
)->shstrtab_hdr
.sh_name
=
4838 (unsigned int) _bfd_elf_strtab_add (shstrtab
, ".shstrtab", FALSE
);
4839 if (elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4840 || elf_tdata (abfd
)->symtab_hdr
.sh_name
== (unsigned int) -1
4841 || elf_tdata (abfd
)->shstrtab_hdr
.sh_name
== (unsigned int) -1)
4847 /* Assign file positions for all the reloc sections which are not part
4848 of the loadable file image. */
4851 _bfd_elf_assign_file_positions_for_relocs (bfd
*abfd
)
4854 unsigned int i
, num_sec
;
4855 Elf_Internal_Shdr
**shdrpp
;
4857 off
= elf_tdata (abfd
)->next_file_pos
;
4859 num_sec
= elf_numsections (abfd
);
4860 for (i
= 1, shdrpp
= elf_elfsections (abfd
) + 1; i
< num_sec
; i
++, shdrpp
++)
4862 Elf_Internal_Shdr
*shdrp
;
4865 if ((shdrp
->sh_type
== SHT_REL
|| shdrp
->sh_type
== SHT_RELA
)
4866 && shdrp
->sh_offset
== -1)
4867 off
= _bfd_elf_assign_file_position_for_section (shdrp
, off
, TRUE
);
4870 elf_tdata (abfd
)->next_file_pos
= off
;
4874 _bfd_elf_write_object_contents (bfd
*abfd
)
4876 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
4877 Elf_Internal_Ehdr
*i_ehdrp
;
4878 Elf_Internal_Shdr
**i_shdrp
;
4880 unsigned int count
, num_sec
;
4882 if (! abfd
->output_has_begun
4883 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
4886 i_shdrp
= elf_elfsections (abfd
);
4887 i_ehdrp
= elf_elfheader (abfd
);
4890 bfd_map_over_sections (abfd
, bed
->s
->write_relocs
, &failed
);
4894 _bfd_elf_assign_file_positions_for_relocs (abfd
);
4896 /* After writing the headers, we need to write the sections too... */
4897 num_sec
= elf_numsections (abfd
);
4898 for (count
= 1; count
< num_sec
; count
++)
4900 if (bed
->elf_backend_section_processing
)
4901 (*bed
->elf_backend_section_processing
) (abfd
, i_shdrp
[count
]);
4902 if (i_shdrp
[count
]->contents
)
4904 bfd_size_type amt
= i_shdrp
[count
]->sh_size
;
4906 if (bfd_seek (abfd
, i_shdrp
[count
]->sh_offset
, SEEK_SET
) != 0
4907 || bfd_bwrite (i_shdrp
[count
]->contents
, amt
, abfd
) != amt
)
4910 if (count
== SHN_LORESERVE
- 1)
4911 count
+= SHN_HIRESERVE
+ 1 - SHN_LORESERVE
;
4914 /* Write out the section header names. */
4915 if (bfd_seek (abfd
, elf_tdata (abfd
)->shstrtab_hdr
.sh_offset
, SEEK_SET
) != 0
4916 || ! _bfd_elf_strtab_emit (abfd
, elf_shstrtab (abfd
)))
4919 if (bed
->elf_backend_final_write_processing
)
4920 (*bed
->elf_backend_final_write_processing
) (abfd
,
4921 elf_tdata (abfd
)->linker
);
4923 return bed
->s
->write_shdrs_and_ehdr (abfd
);
4927 _bfd_elf_write_corefile_contents (bfd
*abfd
)
4929 /* Hopefully this can be done just like an object file. */
4930 return _bfd_elf_write_object_contents (abfd
);
4933 /* Given a section, search the header to find them. */
4936 _bfd_elf_section_from_bfd_section (bfd
*abfd
, struct bfd_section
*asect
)
4938 const struct elf_backend_data
*bed
;
4941 if (elf_section_data (asect
) != NULL
4942 && elf_section_data (asect
)->this_idx
!= 0)
4943 return elf_section_data (asect
)->this_idx
;
4945 if (bfd_is_abs_section (asect
))
4947 else if (bfd_is_com_section (asect
))
4949 else if (bfd_is_und_section (asect
))
4954 bed
= get_elf_backend_data (abfd
);
4955 if (bed
->elf_backend_section_from_bfd_section
)
4959 if ((*bed
->elf_backend_section_from_bfd_section
) (abfd
, asect
, &retval
))
4964 bfd_set_error (bfd_error_nonrepresentable_section
);
4969 /* Given a BFD symbol, return the index in the ELF symbol table, or -1
4973 _bfd_elf_symbol_from_bfd_symbol (bfd
*abfd
, asymbol
**asym_ptr_ptr
)
4975 asymbol
*asym_ptr
= *asym_ptr_ptr
;
4977 flagword flags
= asym_ptr
->flags
;
4979 /* When gas creates relocations against local labels, it creates its
4980 own symbol for the section, but does put the symbol into the
4981 symbol chain, so udata is 0. When the linker is generating
4982 relocatable output, this section symbol may be for one of the
4983 input sections rather than the output section. */
4984 if (asym_ptr
->udata
.i
== 0
4985 && (flags
& BSF_SECTION_SYM
)
4986 && asym_ptr
->section
)
4990 if (asym_ptr
->section
->output_section
!= NULL
)
4991 indx
= asym_ptr
->section
->output_section
->index
;
4993 indx
= asym_ptr
->section
->index
;
4994 if (indx
< elf_num_section_syms (abfd
)
4995 && elf_section_syms (abfd
)[indx
] != NULL
)
4996 asym_ptr
->udata
.i
= elf_section_syms (abfd
)[indx
]->udata
.i
;
4999 idx
= asym_ptr
->udata
.i
;
5003 /* This case can occur when using --strip-symbol on a symbol
5004 which is used in a relocation entry. */
5005 (*_bfd_error_handler
)
5006 (_("%B: symbol `%s' required but not present"),
5007 abfd
, bfd_asymbol_name (asym_ptr
));
5008 bfd_set_error (bfd_error_no_symbols
);
5015 "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
5016 (long) asym_ptr
, asym_ptr
->name
, idx
, flags
,
5017 elf_symbol_flags (flags
));
5025 /* Copy private BFD data. This copies any program header information. */
5028 copy_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
5030 Elf_Internal_Ehdr
*iehdr
;
5031 struct elf_segment_map
*map
;
5032 struct elf_segment_map
*map_first
;
5033 struct elf_segment_map
**pointer_to_map
;
5034 Elf_Internal_Phdr
*segment
;
5037 unsigned int num_segments
;
5038 bfd_boolean phdr_included
= FALSE
;
5039 bfd_vma maxpagesize
;
5040 struct elf_segment_map
*phdr_adjust_seg
= NULL
;
5041 unsigned int phdr_adjust_num
= 0;
5042 const struct elf_backend_data
*bed
;
5044 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5045 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5048 if (elf_tdata (ibfd
)->phdr
== NULL
)
5051 bed
= get_elf_backend_data (ibfd
);
5052 iehdr
= elf_elfheader (ibfd
);
5055 pointer_to_map
= &map_first
;
5057 num_segments
= elf_elfheader (ibfd
)->e_phnum
;
5058 maxpagesize
= get_elf_backend_data (obfd
)->maxpagesize
;
5060 /* Returns the end address of the segment + 1. */
5061 #define SEGMENT_END(segment, start) \
5062 (start + (segment->p_memsz > segment->p_filesz \
5063 ? segment->p_memsz : segment->p_filesz))
5065 #define SECTION_SIZE(section, segment) \
5066 (((section->flags & (SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) \
5067 != SEC_THREAD_LOCAL || segment->p_type == PT_TLS) \
5068 ? section->size : 0)
5070 /* Returns TRUE if the given section is contained within
5071 the given segment. VMA addresses are compared. */
5072 #define IS_CONTAINED_BY_VMA(section, segment) \
5073 (section->vma >= segment->p_vaddr \
5074 && (section->vma + SECTION_SIZE (section, segment) \
5075 <= (SEGMENT_END (segment, segment->p_vaddr))))
5077 /* Returns TRUE if the given section is contained within
5078 the given segment. LMA addresses are compared. */
5079 #define IS_CONTAINED_BY_LMA(section, segment, base) \
5080 (section->lma >= base \
5081 && (section->lma + SECTION_SIZE (section, segment) \
5082 <= SEGMENT_END (segment, base)))
5084 /* Special case: corefile "NOTE" section containing regs, prpsinfo etc. */
5085 #define IS_COREFILE_NOTE(p, s) \
5086 (p->p_type == PT_NOTE \
5087 && bfd_get_format (ibfd) == bfd_core \
5088 && s->vma == 0 && s->lma == 0 \
5089 && (bfd_vma) s->filepos >= p->p_offset \
5090 && ((bfd_vma) s->filepos + s->size \
5091 <= p->p_offset + p->p_filesz))
5093 /* The complicated case when p_vaddr is 0 is to handle the Solaris
5094 linker, which generates a PT_INTERP section with p_vaddr and
5095 p_memsz set to 0. */
5096 #define IS_SOLARIS_PT_INTERP(p, s) \
5098 && p->p_paddr == 0 \
5099 && p->p_memsz == 0 \
5100 && p->p_filesz > 0 \
5101 && (s->flags & SEC_HAS_CONTENTS) != 0 \
5103 && (bfd_vma) s->filepos >= p->p_offset \
5104 && ((bfd_vma) s->filepos + s->size \
5105 <= p->p_offset + p->p_filesz))
5107 /* Decide if the given section should be included in the given segment.
5108 A section will be included if:
5109 1. It is within the address space of the segment -- we use the LMA
5110 if that is set for the segment and the VMA otherwise,
5111 2. It is an allocated segment,
5112 3. There is an output section associated with it,
5113 4. The section has not already been allocated to a previous segment.
5114 5. PT_GNU_STACK segments do not include any sections.
5115 6. PT_TLS segment includes only SHF_TLS sections.
5116 7. SHF_TLS sections are only in PT_TLS or PT_LOAD segments.
5117 8. PT_DYNAMIC should not contain empty sections at the beginning
5118 (with the possible exception of .dynamic). */
5119 #define INCLUDE_SECTION_IN_SEGMENT(section, segment, bed) \
5120 ((((segment->p_paddr \
5121 ? IS_CONTAINED_BY_LMA (section, segment, segment->p_paddr) \
5122 : IS_CONTAINED_BY_VMA (section, segment)) \
5123 && (section->flags & SEC_ALLOC) != 0) \
5124 || IS_COREFILE_NOTE (segment, section)) \
5125 && section->output_section != NULL \
5126 && segment->p_type != PT_GNU_STACK \
5127 && (segment->p_type != PT_TLS \
5128 || (section->flags & SEC_THREAD_LOCAL)) \
5129 && (segment->p_type == PT_LOAD \
5130 || segment->p_type == PT_TLS \
5131 || (section->flags & SEC_THREAD_LOCAL) == 0) \
5132 && (segment->p_type != PT_DYNAMIC \
5133 || SECTION_SIZE (section, segment) > 0 \
5134 || (segment->p_paddr \
5135 ? segment->p_paddr != section->lma \
5136 : segment->p_vaddr != section->vma) \
5137 || (strcmp (bfd_get_section_name (ibfd, section), ".dynamic") \
5139 && ! section->segment_mark)
5141 /* Returns TRUE iff seg1 starts after the end of seg2. */
5142 #define SEGMENT_AFTER_SEGMENT(seg1, seg2, field) \
5143 (seg1->field >= SEGMENT_END (seg2, seg2->field))
5145 /* Returns TRUE iff seg1 and seg2 overlap. Segments overlap iff both
5146 their VMA address ranges and their LMA address ranges overlap.
5147 It is possible to have overlapping VMA ranges without overlapping LMA
5148 ranges. RedBoot images for example can have both .data and .bss mapped
5149 to the same VMA range, but with the .data section mapped to a different
5151 #define SEGMENT_OVERLAPS(seg1, seg2) \
5152 ( !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_vaddr) \
5153 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_vaddr)) \
5154 && !(SEGMENT_AFTER_SEGMENT (seg1, seg2, p_paddr) \
5155 || SEGMENT_AFTER_SEGMENT (seg2, seg1, p_paddr)))
5157 /* Initialise the segment mark field. */
5158 for (section
= ibfd
->sections
; section
!= NULL
; section
= section
->next
)
5159 section
->segment_mark
= FALSE
;
5161 /* Scan through the segments specified in the program header
5162 of the input BFD. For this first scan we look for overlaps
5163 in the loadable segments. These can be created by weird
5164 parameters to objcopy. Also, fix some solaris weirdness. */
5165 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5170 Elf_Internal_Phdr
*segment2
;
5172 if (segment
->p_type
== PT_INTERP
)
5173 for (section
= ibfd
->sections
; section
; section
= section
->next
)
5174 if (IS_SOLARIS_PT_INTERP (segment
, section
))
5176 /* Mininal change so that the normal section to segment
5177 assignment code will work. */
5178 segment
->p_vaddr
= section
->vma
;
5182 if (segment
->p_type
!= PT_LOAD
)
5185 /* Determine if this segment overlaps any previous segments. */
5186 for (j
= 0, segment2
= elf_tdata (ibfd
)->phdr
; j
< i
; j
++, segment2
++)
5188 bfd_signed_vma extra_length
;
5190 if (segment2
->p_type
!= PT_LOAD
5191 || ! SEGMENT_OVERLAPS (segment
, segment2
))
5194 /* Merge the two segments together. */
5195 if (segment2
->p_vaddr
< segment
->p_vaddr
)
5197 /* Extend SEGMENT2 to include SEGMENT and then delete
5200 SEGMENT_END (segment
, segment
->p_vaddr
)
5201 - SEGMENT_END (segment2
, segment2
->p_vaddr
);
5203 if (extra_length
> 0)
5205 segment2
->p_memsz
+= extra_length
;
5206 segment2
->p_filesz
+= extra_length
;
5209 segment
->p_type
= PT_NULL
;
5211 /* Since we have deleted P we must restart the outer loop. */
5213 segment
= elf_tdata (ibfd
)->phdr
;
5218 /* Extend SEGMENT to include SEGMENT2 and then delete
5221 SEGMENT_END (segment2
, segment2
->p_vaddr
)
5222 - SEGMENT_END (segment
, segment
->p_vaddr
);
5224 if (extra_length
> 0)
5226 segment
->p_memsz
+= extra_length
;
5227 segment
->p_filesz
+= extra_length
;
5230 segment2
->p_type
= PT_NULL
;
5235 /* The second scan attempts to assign sections to segments. */
5236 for (i
= 0, segment
= elf_tdata (ibfd
)->phdr
;
5240 unsigned int section_count
;
5241 asection
** sections
;
5242 asection
* output_section
;
5244 bfd_vma matching_lma
;
5245 bfd_vma suggested_lma
;
5249 if (segment
->p_type
== PT_NULL
)
5252 /* Compute how many sections might be placed into this segment. */
5253 for (section
= ibfd
->sections
, section_count
= 0;
5255 section
= section
->next
)
5256 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5259 /* Allocate a segment map big enough to contain
5260 all of the sections we have selected. */
5261 amt
= sizeof (struct elf_segment_map
);
5262 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5263 map
= bfd_alloc (obfd
, amt
);
5267 /* Initialise the fields of the segment map. Default to
5268 using the physical address of the segment in the input BFD. */
5270 map
->p_type
= segment
->p_type
;
5271 map
->p_flags
= segment
->p_flags
;
5272 map
->p_flags_valid
= 1;
5273 map
->p_paddr
= segment
->p_paddr
;
5274 map
->p_paddr_valid
= 1;
5276 /* Determine if this segment contains the ELF file header
5277 and if it contains the program headers themselves. */
5278 map
->includes_filehdr
= (segment
->p_offset
== 0
5279 && segment
->p_filesz
>= iehdr
->e_ehsize
);
5281 map
->includes_phdrs
= 0;
5283 if (! phdr_included
|| segment
->p_type
!= PT_LOAD
)
5285 map
->includes_phdrs
=
5286 (segment
->p_offset
<= (bfd_vma
) iehdr
->e_phoff
5287 && (segment
->p_offset
+ segment
->p_filesz
5288 >= ((bfd_vma
) iehdr
->e_phoff
5289 + iehdr
->e_phnum
* iehdr
->e_phentsize
)));
5291 if (segment
->p_type
== PT_LOAD
&& map
->includes_phdrs
)
5292 phdr_included
= TRUE
;
5295 if (section_count
== 0)
5297 /* Special segments, such as the PT_PHDR segment, may contain
5298 no sections, but ordinary, loadable segments should contain
5299 something. They are allowed by the ELF spec however, so only
5300 a warning is produced. */
5301 if (segment
->p_type
== PT_LOAD
)
5302 (*_bfd_error_handler
)
5303 (_("%B: warning: Empty loadable segment detected, is this intentional ?\n"),
5307 *pointer_to_map
= map
;
5308 pointer_to_map
= &map
->next
;
5313 /* Now scan the sections in the input BFD again and attempt
5314 to add their corresponding output sections to the segment map.
5315 The problem here is how to handle an output section which has
5316 been moved (ie had its LMA changed). There are four possibilities:
5318 1. None of the sections have been moved.
5319 In this case we can continue to use the segment LMA from the
5322 2. All of the sections have been moved by the same amount.
5323 In this case we can change the segment's LMA to match the LMA
5324 of the first section.
5326 3. Some of the sections have been moved, others have not.
5327 In this case those sections which have not been moved can be
5328 placed in the current segment which will have to have its size,
5329 and possibly its LMA changed, and a new segment or segments will
5330 have to be created to contain the other sections.
5332 4. The sections have been moved, but not by the same amount.
5333 In this case we can change the segment's LMA to match the LMA
5334 of the first section and we will have to create a new segment
5335 or segments to contain the other sections.
5337 In order to save time, we allocate an array to hold the section
5338 pointers that we are interested in. As these sections get assigned
5339 to a segment, they are removed from this array. */
5341 /* Gcc 2.96 miscompiles this code on mips. Don't do casting here
5342 to work around this long long bug. */
5343 amt
= section_count
* sizeof (asection
*);
5344 sections
= bfd_malloc (amt
);
5345 if (sections
== NULL
)
5348 /* Step One: Scan for segment vs section LMA conflicts.
5349 Also add the sections to the section array allocated above.
5350 Also add the sections to the current segment. In the common
5351 case, where the sections have not been moved, this means that
5352 we have completely filled the segment, and there is nothing
5358 for (j
= 0, section
= ibfd
->sections
;
5360 section
= section
->next
)
5362 if (INCLUDE_SECTION_IN_SEGMENT (section
, segment
, bed
))
5364 output_section
= section
->output_section
;
5366 sections
[j
++] = section
;
5368 /* The Solaris native linker always sets p_paddr to 0.
5369 We try to catch that case here, and set it to the
5370 correct value. Note - some backends require that
5371 p_paddr be left as zero. */
5372 if (segment
->p_paddr
== 0
5373 && segment
->p_vaddr
!= 0
5374 && (! bed
->want_p_paddr_set_to_zero
)
5376 && output_section
->lma
!= 0
5377 && (output_section
->vma
== (segment
->p_vaddr
5378 + (map
->includes_filehdr
5381 + (map
->includes_phdrs
5383 * iehdr
->e_phentsize
)
5385 map
->p_paddr
= segment
->p_vaddr
;
5387 /* Match up the physical address of the segment with the
5388 LMA address of the output section. */
5389 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5390 || IS_COREFILE_NOTE (segment
, section
)
5391 || (bed
->want_p_paddr_set_to_zero
&&
5392 IS_CONTAINED_BY_VMA (output_section
, segment
))
5395 if (matching_lma
== 0)
5396 matching_lma
= output_section
->lma
;
5398 /* We assume that if the section fits within the segment
5399 then it does not overlap any other section within that
5401 map
->sections
[isec
++] = output_section
;
5403 else if (suggested_lma
== 0)
5404 suggested_lma
= output_section
->lma
;
5408 BFD_ASSERT (j
== section_count
);
5410 /* Step Two: Adjust the physical address of the current segment,
5412 if (isec
== section_count
)
5414 /* All of the sections fitted within the segment as currently
5415 specified. This is the default case. Add the segment to
5416 the list of built segments and carry on to process the next
5417 program header in the input BFD. */
5418 map
->count
= section_count
;
5419 *pointer_to_map
= map
;
5420 pointer_to_map
= &map
->next
;
5427 if (matching_lma
!= 0)
5429 /* At least one section fits inside the current segment.
5430 Keep it, but modify its physical address to match the
5431 LMA of the first section that fitted. */
5432 map
->p_paddr
= matching_lma
;
5436 /* None of the sections fitted inside the current segment.
5437 Change the current segment's physical address to match
5438 the LMA of the first section. */
5439 map
->p_paddr
= suggested_lma
;
5442 /* Offset the segment physical address from the lma
5443 to allow for space taken up by elf headers. */
5444 if (map
->includes_filehdr
)
5445 map
->p_paddr
-= iehdr
->e_ehsize
;
5447 if (map
->includes_phdrs
)
5449 map
->p_paddr
-= iehdr
->e_phnum
* iehdr
->e_phentsize
;
5451 /* iehdr->e_phnum is just an estimate of the number
5452 of program headers that we will need. Make a note
5453 here of the number we used and the segment we chose
5454 to hold these headers, so that we can adjust the
5455 offset when we know the correct value. */
5456 phdr_adjust_num
= iehdr
->e_phnum
;
5457 phdr_adjust_seg
= map
;
5461 /* Step Three: Loop over the sections again, this time assigning
5462 those that fit to the current segment and removing them from the
5463 sections array; but making sure not to leave large gaps. Once all
5464 possible sections have been assigned to the current segment it is
5465 added to the list of built segments and if sections still remain
5466 to be assigned, a new segment is constructed before repeating
5474 /* Fill the current segment with sections that fit. */
5475 for (j
= 0; j
< section_count
; j
++)
5477 section
= sections
[j
];
5479 if (section
== NULL
)
5482 output_section
= section
->output_section
;
5484 BFD_ASSERT (output_section
!= NULL
);
5486 if (IS_CONTAINED_BY_LMA (output_section
, segment
, map
->p_paddr
)
5487 || IS_COREFILE_NOTE (segment
, section
))
5489 if (map
->count
== 0)
5491 /* If the first section in a segment does not start at
5492 the beginning of the segment, then something is
5494 if (output_section
->lma
!=
5496 + (map
->includes_filehdr
? iehdr
->e_ehsize
: 0)
5497 + (map
->includes_phdrs
5498 ? iehdr
->e_phnum
* iehdr
->e_phentsize
5504 asection
* prev_sec
;
5506 prev_sec
= map
->sections
[map
->count
- 1];
5508 /* If the gap between the end of the previous section
5509 and the start of this section is more than
5510 maxpagesize then we need to start a new segment. */
5511 if ((BFD_ALIGN (prev_sec
->lma
+ prev_sec
->size
,
5513 < BFD_ALIGN (output_section
->lma
, maxpagesize
))
5514 || ((prev_sec
->lma
+ prev_sec
->size
)
5515 > output_section
->lma
))
5517 if (suggested_lma
== 0)
5518 suggested_lma
= output_section
->lma
;
5524 map
->sections
[map
->count
++] = output_section
;
5527 section
->segment_mark
= TRUE
;
5529 else if (suggested_lma
== 0)
5530 suggested_lma
= output_section
->lma
;
5533 BFD_ASSERT (map
->count
> 0);
5535 /* Add the current segment to the list of built segments. */
5536 *pointer_to_map
= map
;
5537 pointer_to_map
= &map
->next
;
5539 if (isec
< section_count
)
5541 /* We still have not allocated all of the sections to
5542 segments. Create a new segment here, initialise it
5543 and carry on looping. */
5544 amt
= sizeof (struct elf_segment_map
);
5545 amt
+= ((bfd_size_type
) section_count
- 1) * sizeof (asection
*);
5546 map
= bfd_alloc (obfd
, amt
);
5553 /* Initialise the fields of the segment map. Set the physical
5554 physical address to the LMA of the first section that has
5555 not yet been assigned. */
5557 map
->p_type
= segment
->p_type
;
5558 map
->p_flags
= segment
->p_flags
;
5559 map
->p_flags_valid
= 1;
5560 map
->p_paddr
= suggested_lma
;
5561 map
->p_paddr_valid
= 1;
5562 map
->includes_filehdr
= 0;
5563 map
->includes_phdrs
= 0;
5566 while (isec
< section_count
);
5571 /* The Solaris linker creates program headers in which all the
5572 p_paddr fields are zero. When we try to objcopy or strip such a
5573 file, we get confused. Check for this case, and if we find it
5574 reset the p_paddr_valid fields. */
5575 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5576 if (map
->p_paddr
!= 0)
5579 for (map
= map_first
; map
!= NULL
; map
= map
->next
)
5580 map
->p_paddr_valid
= 0;
5582 elf_tdata (obfd
)->segment_map
= map_first
;
5584 /* If we had to estimate the number of program headers that were
5585 going to be needed, then check our estimate now and adjust
5586 the offset if necessary. */
5587 if (phdr_adjust_seg
!= NULL
)
5591 for (count
= 0, map
= map_first
; map
!= NULL
; map
= map
->next
)
5594 if (count
> phdr_adjust_num
)
5595 phdr_adjust_seg
->p_paddr
5596 -= (count
- phdr_adjust_num
) * iehdr
->e_phentsize
;
5601 #undef IS_CONTAINED_BY_VMA
5602 #undef IS_CONTAINED_BY_LMA
5603 #undef IS_COREFILE_NOTE
5604 #undef IS_SOLARIS_PT_INTERP
5605 #undef INCLUDE_SECTION_IN_SEGMENT
5606 #undef SEGMENT_AFTER_SEGMENT
5607 #undef SEGMENT_OVERLAPS
5611 /* Copy private section information. This copies over the entsize
5612 field, and sometimes the info field. */
5615 _bfd_elf_copy_private_section_data (bfd
*ibfd
,
5620 Elf_Internal_Shdr
*ihdr
, *ohdr
;
5622 if (ibfd
->xvec
->flavour
!= bfd_target_elf_flavour
5623 || obfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
5626 ihdr
= &elf_section_data (isec
)->this_hdr
;
5627 ohdr
= &elf_section_data (osec
)->this_hdr
;
5629 ohdr
->sh_entsize
= ihdr
->sh_entsize
;
5631 if (ihdr
->sh_type
== SHT_SYMTAB
5632 || ihdr
->sh_type
== SHT_DYNSYM
5633 || ihdr
->sh_type
== SHT_GNU_verneed
5634 || ihdr
->sh_type
== SHT_GNU_verdef
)
5635 ohdr
->sh_info
= ihdr
->sh_info
;
5637 /* Set things up for objcopy. The output SHT_GROUP section will
5638 have its elf_next_in_group pointing back to the input group
5639 members. Ignore linker created group section. See
5640 elfNN_ia64_object_p in elfxx-ia64.c. */
5641 if (elf_sec_group (isec
) == NULL
5642 || (elf_sec_group (isec
)->flags
& SEC_LINKER_CREATED
) == 0)
5644 elf_next_in_group (osec
) = elf_next_in_group (isec
);
5645 elf_group_name (osec
) = elf_group_name (isec
);
5648 osec
->use_rela_p
= isec
->use_rela_p
;
5653 /* Copy private header information. */
5656 _bfd_elf_copy_private_header_data (bfd
*ibfd
, bfd
*obfd
)
5658 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5659 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5662 /* Copy over private BFD data if it has not already been copied.
5663 This must be done here, rather than in the copy_private_bfd_data
5664 entry point, because the latter is called after the section
5665 contents have been set, which means that the program headers have
5666 already been worked out. */
5667 if (elf_tdata (obfd
)->segment_map
== NULL
&& elf_tdata (ibfd
)->phdr
!= NULL
)
5669 if (! copy_private_bfd_data (ibfd
, obfd
))
5676 /* Copy private symbol information. If this symbol is in a section
5677 which we did not map into a BFD section, try to map the section
5678 index correctly. We use special macro definitions for the mapped
5679 section indices; these definitions are interpreted by the
5680 swap_out_syms function. */
5682 #define MAP_ONESYMTAB (SHN_HIOS + 1)
5683 #define MAP_DYNSYMTAB (SHN_HIOS + 2)
5684 #define MAP_STRTAB (SHN_HIOS + 3)
5685 #define MAP_SHSTRTAB (SHN_HIOS + 4)
5686 #define MAP_SYM_SHNDX (SHN_HIOS + 5)
5689 _bfd_elf_copy_private_symbol_data (bfd
*ibfd
,
5694 elf_symbol_type
*isym
, *osym
;
5696 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
5697 || bfd_get_flavour (obfd
) != bfd_target_elf_flavour
)
5700 isym
= elf_symbol_from (ibfd
, isymarg
);
5701 osym
= elf_symbol_from (obfd
, osymarg
);
5705 && bfd_is_abs_section (isym
->symbol
.section
))
5709 shndx
= isym
->internal_elf_sym
.st_shndx
;
5710 if (shndx
== elf_onesymtab (ibfd
))
5711 shndx
= MAP_ONESYMTAB
;
5712 else if (shndx
== elf_dynsymtab (ibfd
))
5713 shndx
= MAP_DYNSYMTAB
;
5714 else if (shndx
== elf_tdata (ibfd
)->strtab_section
)
5716 else if (shndx
== elf_tdata (ibfd
)->shstrtab_section
)
5717 shndx
= MAP_SHSTRTAB
;
5718 else if (shndx
== elf_tdata (ibfd
)->symtab_shndx_section
)
5719 shndx
= MAP_SYM_SHNDX
;
5720 osym
->internal_elf_sym
.st_shndx
= shndx
;
5726 /* Swap out the symbols. */
5729 swap_out_syms (bfd
*abfd
,
5730 struct bfd_strtab_hash
**sttp
,
5733 const struct elf_backend_data
*bed
;
5736 struct bfd_strtab_hash
*stt
;
5737 Elf_Internal_Shdr
*symtab_hdr
;
5738 Elf_Internal_Shdr
*symtab_shndx_hdr
;
5739 Elf_Internal_Shdr
*symstrtab_hdr
;
5740 bfd_byte
*outbound_syms
;
5741 bfd_byte
*outbound_shndx
;
5744 bfd_boolean name_local_sections
;
5746 if (!elf_map_symbols (abfd
))
5749 /* Dump out the symtabs. */
5750 stt
= _bfd_elf_stringtab_init ();
5754 bed
= get_elf_backend_data (abfd
);
5755 symcount
= bfd_get_symcount (abfd
);
5756 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
5757 symtab_hdr
->sh_type
= SHT_SYMTAB
;
5758 symtab_hdr
->sh_entsize
= bed
->s
->sizeof_sym
;
5759 symtab_hdr
->sh_size
= symtab_hdr
->sh_entsize
* (symcount
+ 1);
5760 symtab_hdr
->sh_info
= elf_num_locals (abfd
) + 1;
5761 symtab_hdr
->sh_addralign
= 1 << bed
->s
->log_file_align
;
5763 symstrtab_hdr
= &elf_tdata (abfd
)->strtab_hdr
;
5764 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
5766 amt
= (bfd_size_type
) (1 + symcount
) * bed
->s
->sizeof_sym
;
5767 outbound_syms
= bfd_alloc (abfd
, amt
);
5768 if (outbound_syms
== NULL
)
5770 _bfd_stringtab_free (stt
);
5773 symtab_hdr
->contents
= outbound_syms
;
5775 outbound_shndx
= NULL
;
5776 symtab_shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
5777 if (symtab_shndx_hdr
->sh_name
!= 0)
5779 amt
= (bfd_size_type
) (1 + symcount
) * sizeof (Elf_External_Sym_Shndx
);
5780 outbound_shndx
= bfd_zalloc (abfd
, amt
);
5781 if (outbound_shndx
== NULL
)
5783 _bfd_stringtab_free (stt
);
5787 symtab_shndx_hdr
->contents
= outbound_shndx
;
5788 symtab_shndx_hdr
->sh_type
= SHT_SYMTAB_SHNDX
;
5789 symtab_shndx_hdr
->sh_size
= amt
;
5790 symtab_shndx_hdr
->sh_addralign
= sizeof (Elf_External_Sym_Shndx
);
5791 symtab_shndx_hdr
->sh_entsize
= sizeof (Elf_External_Sym_Shndx
);
5794 /* Now generate the data (for "contents"). */
5796 /* Fill in zeroth symbol and swap it out. */
5797 Elf_Internal_Sym sym
;
5803 sym
.st_shndx
= SHN_UNDEF
;
5804 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5805 outbound_syms
+= bed
->s
->sizeof_sym
;
5806 if (outbound_shndx
!= NULL
)
5807 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5811 = (bed
->elf_backend_name_local_section_symbols
5812 && bed
->elf_backend_name_local_section_symbols (abfd
));
5814 syms
= bfd_get_outsymbols (abfd
);
5815 for (idx
= 0; idx
< symcount
; idx
++)
5817 Elf_Internal_Sym sym
;
5818 bfd_vma value
= syms
[idx
]->value
;
5819 elf_symbol_type
*type_ptr
;
5820 flagword flags
= syms
[idx
]->flags
;
5823 if (!name_local_sections
5824 && (flags
& (BSF_SECTION_SYM
| BSF_GLOBAL
)) == BSF_SECTION_SYM
)
5826 /* Local section symbols have no name. */
5831 sym
.st_name
= (unsigned long) _bfd_stringtab_add (stt
,
5834 if (sym
.st_name
== (unsigned long) -1)
5836 _bfd_stringtab_free (stt
);
5841 type_ptr
= elf_symbol_from (abfd
, syms
[idx
]);
5843 if ((flags
& BSF_SECTION_SYM
) == 0
5844 && bfd_is_com_section (syms
[idx
]->section
))
5846 /* ELF common symbols put the alignment into the `value' field,
5847 and the size into the `size' field. This is backwards from
5848 how BFD handles it, so reverse it here. */
5849 sym
.st_size
= value
;
5850 if (type_ptr
== NULL
5851 || type_ptr
->internal_elf_sym
.st_value
== 0)
5852 sym
.st_value
= value
>= 16 ? 16 : (1 << bfd_log2 (value
));
5854 sym
.st_value
= type_ptr
->internal_elf_sym
.st_value
;
5855 sym
.st_shndx
= _bfd_elf_section_from_bfd_section
5856 (abfd
, syms
[idx
]->section
);
5860 asection
*sec
= syms
[idx
]->section
;
5863 if (sec
->output_section
)
5865 value
+= sec
->output_offset
;
5866 sec
= sec
->output_section
;
5869 /* Don't add in the section vma for relocatable output. */
5870 if (! relocatable_p
)
5872 sym
.st_value
= value
;
5873 sym
.st_size
= type_ptr
? type_ptr
->internal_elf_sym
.st_size
: 0;
5875 if (bfd_is_abs_section (sec
)
5877 && type_ptr
->internal_elf_sym
.st_shndx
!= 0)
5879 /* This symbol is in a real ELF section which we did
5880 not create as a BFD section. Undo the mapping done
5881 by copy_private_symbol_data. */
5882 shndx
= type_ptr
->internal_elf_sym
.st_shndx
;
5886 shndx
= elf_onesymtab (abfd
);
5889 shndx
= elf_dynsymtab (abfd
);
5892 shndx
= elf_tdata (abfd
)->strtab_section
;
5895 shndx
= elf_tdata (abfd
)->shstrtab_section
;
5898 shndx
= elf_tdata (abfd
)->symtab_shndx_section
;
5906 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
5912 /* Writing this would be a hell of a lot easier if
5913 we had some decent documentation on bfd, and
5914 knew what to expect of the library, and what to
5915 demand of applications. For example, it
5916 appears that `objcopy' might not set the
5917 section of a symbol to be a section that is
5918 actually in the output file. */
5919 sec2
= bfd_get_section_by_name (abfd
, sec
->name
);
5922 _bfd_error_handler (_("\
5923 Unable to find equivalent output section for symbol '%s' from section '%s'"),
5924 syms
[idx
]->name
? syms
[idx
]->name
: "<Local sym>",
5926 bfd_set_error (bfd_error_invalid_operation
);
5927 _bfd_stringtab_free (stt
);
5931 shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec2
);
5932 BFD_ASSERT (shndx
!= -1);
5936 sym
.st_shndx
= shndx
;
5939 if ((flags
& BSF_THREAD_LOCAL
) != 0)
5941 else if ((flags
& BSF_FUNCTION
) != 0)
5943 else if ((flags
& BSF_OBJECT
) != 0)
5948 if (syms
[idx
]->section
->flags
& SEC_THREAD_LOCAL
)
5951 /* Processor-specific types. */
5952 if (type_ptr
!= NULL
5953 && bed
->elf_backend_get_symbol_type
)
5954 type
= ((*bed
->elf_backend_get_symbol_type
)
5955 (&type_ptr
->internal_elf_sym
, type
));
5957 if (flags
& BSF_SECTION_SYM
)
5959 if (flags
& BSF_GLOBAL
)
5960 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, STT_SECTION
);
5962 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_SECTION
);
5964 else if (bfd_is_com_section (syms
[idx
]->section
))
5965 sym
.st_info
= ELF_ST_INFO (STB_GLOBAL
, type
);
5966 else if (bfd_is_und_section (syms
[idx
]->section
))
5967 sym
.st_info
= ELF_ST_INFO (((flags
& BSF_WEAK
)
5971 else if (flags
& BSF_FILE
)
5972 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FILE
);
5975 int bind
= STB_LOCAL
;
5977 if (flags
& BSF_LOCAL
)
5979 else if (flags
& BSF_WEAK
)
5981 else if (flags
& BSF_GLOBAL
)
5984 sym
.st_info
= ELF_ST_INFO (bind
, type
);
5987 if (type_ptr
!= NULL
)
5988 sym
.st_other
= type_ptr
->internal_elf_sym
.st_other
;
5992 bed
->s
->swap_symbol_out (abfd
, &sym
, outbound_syms
, outbound_shndx
);
5993 outbound_syms
+= bed
->s
->sizeof_sym
;
5994 if (outbound_shndx
!= NULL
)
5995 outbound_shndx
+= sizeof (Elf_External_Sym_Shndx
);
5999 symstrtab_hdr
->sh_size
= _bfd_stringtab_size (stt
);
6000 symstrtab_hdr
->sh_type
= SHT_STRTAB
;
6002 symstrtab_hdr
->sh_flags
= 0;
6003 symstrtab_hdr
->sh_addr
= 0;
6004 symstrtab_hdr
->sh_entsize
= 0;
6005 symstrtab_hdr
->sh_link
= 0;
6006 symstrtab_hdr
->sh_info
= 0;
6007 symstrtab_hdr
->sh_addralign
= 1;
6012 /* Return the number of bytes required to hold the symtab vector.
6014 Note that we base it on the count plus 1, since we will null terminate
6015 the vector allocated based on this size. However, the ELF symbol table
6016 always has a dummy entry as symbol #0, so it ends up even. */
6019 _bfd_elf_get_symtab_upper_bound (bfd
*abfd
)
6023 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->symtab_hdr
;
6025 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6026 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6028 symtab_size
-= sizeof (asymbol
*);
6034 _bfd_elf_get_dynamic_symtab_upper_bound (bfd
*abfd
)
6038 Elf_Internal_Shdr
*hdr
= &elf_tdata (abfd
)->dynsymtab_hdr
;
6040 if (elf_dynsymtab (abfd
) == 0)
6042 bfd_set_error (bfd_error_invalid_operation
);
6046 symcount
= hdr
->sh_size
/ get_elf_backend_data (abfd
)->s
->sizeof_sym
;
6047 symtab_size
= (symcount
+ 1) * (sizeof (asymbol
*));
6049 symtab_size
-= sizeof (asymbol
*);
6055 _bfd_elf_get_reloc_upper_bound (bfd
*abfd ATTRIBUTE_UNUSED
,
6058 return (asect
->reloc_count
+ 1) * sizeof (arelent
*);
6061 /* Canonicalize the relocs. */
6064 _bfd_elf_canonicalize_reloc (bfd
*abfd
,
6071 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6073 if (! bed
->s
->slurp_reloc_table (abfd
, section
, symbols
, FALSE
))
6076 tblptr
= section
->relocation
;
6077 for (i
= 0; i
< section
->reloc_count
; i
++)
6078 *relptr
++ = tblptr
++;
6082 return section
->reloc_count
;
6086 _bfd_elf_canonicalize_symtab (bfd
*abfd
, asymbol
**allocation
)
6088 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6089 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, FALSE
);
6092 bfd_get_symcount (abfd
) = symcount
;
6097 _bfd_elf_canonicalize_dynamic_symtab (bfd
*abfd
,
6098 asymbol
**allocation
)
6100 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
6101 long symcount
= bed
->s
->slurp_symbol_table (abfd
, allocation
, TRUE
);
6104 bfd_get_dynamic_symcount (abfd
) = symcount
;
6108 /* Return the size required for the dynamic reloc entries. Any loadable
6109 section that was actually installed in the BFD, and has type SHT_REL
6110 or SHT_RELA, and uses the dynamic symbol table, is considered to be a
6111 dynamic reloc section. */
6114 _bfd_elf_get_dynamic_reloc_upper_bound (bfd
*abfd
)
6119 if (elf_dynsymtab (abfd
) == 0)
6121 bfd_set_error (bfd_error_invalid_operation
);
6125 ret
= sizeof (arelent
*);
6126 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6127 if ((s
->flags
& SEC_LOAD
) != 0
6128 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6129 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6130 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6131 ret
+= ((s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
)
6132 * sizeof (arelent
*));
6137 /* Canonicalize the dynamic relocation entries. Note that we return the
6138 dynamic relocations as a single block, although they are actually
6139 associated with particular sections; the interface, which was
6140 designed for SunOS style shared libraries, expects that there is only
6141 one set of dynamic relocs. Any loadable section that was actually
6142 installed in the BFD, and has type SHT_REL or SHT_RELA, and uses the
6143 dynamic symbol table, is considered to be a dynamic reloc section. */
6146 _bfd_elf_canonicalize_dynamic_reloc (bfd
*abfd
,
6150 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6154 if (elf_dynsymtab (abfd
) == 0)
6156 bfd_set_error (bfd_error_invalid_operation
);
6160 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6162 for (s
= abfd
->sections
; s
!= NULL
; s
= s
->next
)
6164 if ((s
->flags
& SEC_LOAD
) != 0
6165 && elf_section_data (s
)->this_hdr
.sh_link
== elf_dynsymtab (abfd
)
6166 && (elf_section_data (s
)->this_hdr
.sh_type
== SHT_REL
6167 || elf_section_data (s
)->this_hdr
.sh_type
== SHT_RELA
))
6172 if (! (*slurp_relocs
) (abfd
, s
, syms
, TRUE
))
6174 count
= s
->size
/ elf_section_data (s
)->this_hdr
.sh_entsize
;
6176 for (i
= 0; i
< count
; i
++)
6187 /* Read in the version information. */
6190 _bfd_elf_slurp_version_tables (bfd
*abfd
, bfd_boolean default_imported_symver
)
6192 bfd_byte
*contents
= NULL
;
6194 unsigned int freeidx
= 0;
6196 if (elf_dynverref (abfd
) != 0)
6198 Elf_Internal_Shdr
*hdr
;
6199 Elf_External_Verneed
*everneed
;
6200 Elf_Internal_Verneed
*iverneed
;
6203 hdr
= &elf_tdata (abfd
)->dynverref_hdr
;
6205 amt
= (bfd_size_type
) hdr
->sh_info
* sizeof (Elf_Internal_Verneed
);
6206 elf_tdata (abfd
)->verref
= bfd_zalloc (abfd
, amt
);
6207 if (elf_tdata (abfd
)->verref
== NULL
)
6210 elf_tdata (abfd
)->cverrefs
= hdr
->sh_info
;
6212 contents
= bfd_malloc (hdr
->sh_size
);
6213 if (contents
== NULL
)
6215 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6216 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6219 everneed
= (Elf_External_Verneed
*) contents
;
6220 iverneed
= elf_tdata (abfd
)->verref
;
6221 for (i
= 0; i
< hdr
->sh_info
; i
++, iverneed
++)
6223 Elf_External_Vernaux
*evernaux
;
6224 Elf_Internal_Vernaux
*ivernaux
;
6227 _bfd_elf_swap_verneed_in (abfd
, everneed
, iverneed
);
6229 iverneed
->vn_bfd
= abfd
;
6231 iverneed
->vn_filename
=
6232 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6234 if (iverneed
->vn_filename
== NULL
)
6237 amt
= iverneed
->vn_cnt
;
6238 amt
*= sizeof (Elf_Internal_Vernaux
);
6239 iverneed
->vn_auxptr
= bfd_alloc (abfd
, amt
);
6241 evernaux
= ((Elf_External_Vernaux
*)
6242 ((bfd_byte
*) everneed
+ iverneed
->vn_aux
));
6243 ivernaux
= iverneed
->vn_auxptr
;
6244 for (j
= 0; j
< iverneed
->vn_cnt
; j
++, ivernaux
++)
6246 _bfd_elf_swap_vernaux_in (abfd
, evernaux
, ivernaux
);
6248 ivernaux
->vna_nodename
=
6249 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6250 ivernaux
->vna_name
);
6251 if (ivernaux
->vna_nodename
== NULL
)
6254 if (j
+ 1 < iverneed
->vn_cnt
)
6255 ivernaux
->vna_nextptr
= ivernaux
+ 1;
6257 ivernaux
->vna_nextptr
= NULL
;
6259 evernaux
= ((Elf_External_Vernaux
*)
6260 ((bfd_byte
*) evernaux
+ ivernaux
->vna_next
));
6262 if (ivernaux
->vna_other
> freeidx
)
6263 freeidx
= ivernaux
->vna_other
;
6266 if (i
+ 1 < hdr
->sh_info
)
6267 iverneed
->vn_nextref
= iverneed
+ 1;
6269 iverneed
->vn_nextref
= NULL
;
6271 everneed
= ((Elf_External_Verneed
*)
6272 ((bfd_byte
*) everneed
+ iverneed
->vn_next
));
6279 if (elf_dynverdef (abfd
) != 0)
6281 Elf_Internal_Shdr
*hdr
;
6282 Elf_External_Verdef
*everdef
;
6283 Elf_Internal_Verdef
*iverdef
;
6284 Elf_Internal_Verdef
*iverdefarr
;
6285 Elf_Internal_Verdef iverdefmem
;
6287 unsigned int maxidx
;
6289 hdr
= &elf_tdata (abfd
)->dynverdef_hdr
;
6291 contents
= bfd_malloc (hdr
->sh_size
);
6292 if (contents
== NULL
)
6294 if (bfd_seek (abfd
, hdr
->sh_offset
, SEEK_SET
) != 0
6295 || bfd_bread (contents
, hdr
->sh_size
, abfd
) != hdr
->sh_size
)
6298 /* We know the number of entries in the section but not the maximum
6299 index. Therefore we have to run through all entries and find
6301 everdef
= (Elf_External_Verdef
*) contents
;
6303 for (i
= 0; i
< hdr
->sh_info
; ++i
)
6305 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6307 if ((iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
)) > maxidx
)
6308 maxidx
= iverdefmem
.vd_ndx
& ((unsigned) VERSYM_VERSION
);
6310 everdef
= ((Elf_External_Verdef
*)
6311 ((bfd_byte
*) everdef
+ iverdefmem
.vd_next
));
6314 if (default_imported_symver
)
6316 if (freeidx
> maxidx
)
6321 amt
= (bfd_size_type
) maxidx
* sizeof (Elf_Internal_Verdef
);
6322 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6323 if (elf_tdata (abfd
)->verdef
== NULL
)
6326 elf_tdata (abfd
)->cverdefs
= maxidx
;
6328 everdef
= (Elf_External_Verdef
*) contents
;
6329 iverdefarr
= elf_tdata (abfd
)->verdef
;
6330 for (i
= 0; i
< hdr
->sh_info
; i
++)
6332 Elf_External_Verdaux
*everdaux
;
6333 Elf_Internal_Verdaux
*iverdaux
;
6336 _bfd_elf_swap_verdef_in (abfd
, everdef
, &iverdefmem
);
6338 iverdef
= &iverdefarr
[(iverdefmem
.vd_ndx
& VERSYM_VERSION
) - 1];
6339 memcpy (iverdef
, &iverdefmem
, sizeof (Elf_Internal_Verdef
));
6341 iverdef
->vd_bfd
= abfd
;
6343 amt
= (bfd_size_type
) iverdef
->vd_cnt
* sizeof (Elf_Internal_Verdaux
);
6344 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6345 if (iverdef
->vd_auxptr
== NULL
)
6348 everdaux
= ((Elf_External_Verdaux
*)
6349 ((bfd_byte
*) everdef
+ iverdef
->vd_aux
));
6350 iverdaux
= iverdef
->vd_auxptr
;
6351 for (j
= 0; j
< iverdef
->vd_cnt
; j
++, iverdaux
++)
6353 _bfd_elf_swap_verdaux_in (abfd
, everdaux
, iverdaux
);
6355 iverdaux
->vda_nodename
=
6356 bfd_elf_string_from_elf_section (abfd
, hdr
->sh_link
,
6357 iverdaux
->vda_name
);
6358 if (iverdaux
->vda_nodename
== NULL
)
6361 if (j
+ 1 < iverdef
->vd_cnt
)
6362 iverdaux
->vda_nextptr
= iverdaux
+ 1;
6364 iverdaux
->vda_nextptr
= NULL
;
6366 everdaux
= ((Elf_External_Verdaux
*)
6367 ((bfd_byte
*) everdaux
+ iverdaux
->vda_next
));
6370 iverdef
->vd_nodename
= iverdef
->vd_auxptr
->vda_nodename
;
6372 if (i
+ 1 < hdr
->sh_info
)
6373 iverdef
->vd_nextdef
= iverdef
+ 1;
6375 iverdef
->vd_nextdef
= NULL
;
6377 everdef
= ((Elf_External_Verdef
*)
6378 ((bfd_byte
*) everdef
+ iverdef
->vd_next
));
6384 else if (default_imported_symver
)
6391 amt
= (bfd_size_type
) freeidx
* sizeof (Elf_Internal_Verdef
);
6392 elf_tdata (abfd
)->verdef
= bfd_zalloc (abfd
, amt
);
6393 if (elf_tdata (abfd
)->verdef
== NULL
)
6396 elf_tdata (abfd
)->cverdefs
= freeidx
;
6399 /* Create a default version based on the soname. */
6400 if (default_imported_symver
)
6402 Elf_Internal_Verdef
*iverdef
;
6403 Elf_Internal_Verdaux
*iverdaux
;
6405 iverdef
= &elf_tdata (abfd
)->verdef
[freeidx
- 1];;
6407 iverdef
->vd_version
= VER_DEF_CURRENT
;
6408 iverdef
->vd_flags
= 0;
6409 iverdef
->vd_ndx
= freeidx
;
6410 iverdef
->vd_cnt
= 1;
6412 iverdef
->vd_bfd
= abfd
;
6414 iverdef
->vd_nodename
= bfd_elf_get_dt_soname (abfd
);
6415 if (iverdef
->vd_nodename
== NULL
)
6417 iverdef
->vd_nextdef
= NULL
;
6418 amt
= (bfd_size_type
) sizeof (Elf_Internal_Verdaux
);
6419 iverdef
->vd_auxptr
= bfd_alloc (abfd
, amt
);
6421 iverdaux
= iverdef
->vd_auxptr
;
6422 iverdaux
->vda_nodename
= iverdef
->vd_nodename
;
6423 iverdaux
->vda_nextptr
= NULL
;
6429 if (contents
!= NULL
)
6435 _bfd_elf_make_empty_symbol (bfd
*abfd
)
6437 elf_symbol_type
*newsym
;
6438 bfd_size_type amt
= sizeof (elf_symbol_type
);
6440 newsym
= bfd_zalloc (abfd
, amt
);
6445 newsym
->symbol
.the_bfd
= abfd
;
6446 return &newsym
->symbol
;
6451 _bfd_elf_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
6455 bfd_symbol_info (symbol
, ret
);
6458 /* Return whether a symbol name implies a local symbol. Most targets
6459 use this function for the is_local_label_name entry point, but some
6463 _bfd_elf_is_local_label_name (bfd
*abfd ATTRIBUTE_UNUSED
,
6466 /* Normal local symbols start with ``.L''. */
6467 if (name
[0] == '.' && name
[1] == 'L')
6470 /* At least some SVR4 compilers (e.g., UnixWare 2.1 cc) generate
6471 DWARF debugging symbols starting with ``..''. */
6472 if (name
[0] == '.' && name
[1] == '.')
6475 /* gcc will sometimes generate symbols beginning with ``_.L_'' when
6476 emitting DWARF debugging output. I suspect this is actually a
6477 small bug in gcc (it calls ASM_OUTPUT_LABEL when it should call
6478 ASM_GENERATE_INTERNAL_LABEL, and this causes the leading
6479 underscore to be emitted on some ELF targets). For ease of use,
6480 we treat such symbols as local. */
6481 if (name
[0] == '_' && name
[1] == '.' && name
[2] == 'L' && name
[3] == '_')
6488 _bfd_elf_get_lineno (bfd
*abfd ATTRIBUTE_UNUSED
,
6489 asymbol
*symbol ATTRIBUTE_UNUSED
)
6496 _bfd_elf_set_arch_mach (bfd
*abfd
,
6497 enum bfd_architecture arch
,
6498 unsigned long machine
)
6500 /* If this isn't the right architecture for this backend, and this
6501 isn't the generic backend, fail. */
6502 if (arch
!= get_elf_backend_data (abfd
)->arch
6503 && arch
!= bfd_arch_unknown
6504 && get_elf_backend_data (abfd
)->arch
!= bfd_arch_unknown
)
6507 return bfd_default_set_arch_mach (abfd
, arch
, machine
);
6510 /* Find the function to a particular section and offset,
6511 for error reporting. */
6514 elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
6518 const char **filename_ptr
,
6519 const char **functionname_ptr
)
6521 const char *filename
;
6522 asymbol
*func
, *file
;
6525 /* ??? Given multiple file symbols, it is impossible to reliably
6526 choose the right file name for global symbols. File symbols are
6527 local symbols, and thus all file symbols must sort before any
6528 global symbols. The ELF spec may be interpreted to say that a
6529 file symbol must sort before other local symbols, but currently
6530 ld -r doesn't do this. So, for ld -r output, it is possible to
6531 make a better choice of file name for local symbols by ignoring
6532 file symbols appearing after a given local symbol. */
6533 enum { nothing_seen
, symbol_seen
, file_after_symbol_seen
} state
;
6539 state
= nothing_seen
;
6541 for (p
= symbols
; *p
!= NULL
; p
++)
6545 q
= (elf_symbol_type
*) *p
;
6547 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
6553 if (state
== symbol_seen
)
6554 state
= file_after_symbol_seen
;
6560 if (bfd_get_section (&q
->symbol
) == section
6561 && q
->symbol
.value
>= low_func
6562 && q
->symbol
.value
<= offset
)
6564 func
= (asymbol
*) q
;
6565 low_func
= q
->symbol
.value
;
6568 else if (ELF_ST_BIND (q
->internal_elf_sym
.st_info
) != STB_LOCAL
6569 && state
== file_after_symbol_seen
)
6572 filename
= bfd_asymbol_name (file
);
6576 if (state
== nothing_seen
)
6577 state
= symbol_seen
;
6584 *filename_ptr
= filename
;
6585 if (functionname_ptr
)
6586 *functionname_ptr
= bfd_asymbol_name (func
);
6591 /* Find the nearest line to a particular section and offset,
6592 for error reporting. */
6595 _bfd_elf_find_nearest_line (bfd
*abfd
,
6599 const char **filename_ptr
,
6600 const char **functionname_ptr
,
6601 unsigned int *line_ptr
)
6605 if (_bfd_dwarf1_find_nearest_line (abfd
, section
, symbols
, offset
,
6606 filename_ptr
, functionname_ptr
,
6609 if (!*functionname_ptr
)
6610 elf_find_function (abfd
, section
, symbols
, offset
,
6611 *filename_ptr
? NULL
: filename_ptr
,
6617 if (_bfd_dwarf2_find_nearest_line (abfd
, section
, symbols
, offset
,
6618 filename_ptr
, functionname_ptr
,
6620 &elf_tdata (abfd
)->dwarf2_find_line_info
))
6622 if (!*functionname_ptr
)
6623 elf_find_function (abfd
, section
, symbols
, offset
,
6624 *filename_ptr
? NULL
: filename_ptr
,
6630 if (! _bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
6631 &found
, filename_ptr
,
6632 functionname_ptr
, line_ptr
,
6633 &elf_tdata (abfd
)->line_info
))
6635 if (found
&& (*functionname_ptr
|| *line_ptr
))
6638 if (symbols
== NULL
)
6641 if (! elf_find_function (abfd
, section
, symbols
, offset
,
6642 filename_ptr
, functionname_ptr
))
6650 _bfd_elf_sizeof_headers (bfd
*abfd
, bfd_boolean reloc
)
6654 ret
= get_elf_backend_data (abfd
)->s
->sizeof_ehdr
;
6656 ret
+= get_program_header_size (abfd
);
6661 _bfd_elf_set_section_contents (bfd
*abfd
,
6663 const void *location
,
6665 bfd_size_type count
)
6667 Elf_Internal_Shdr
*hdr
;
6670 if (! abfd
->output_has_begun
6671 && ! _bfd_elf_compute_section_file_positions (abfd
, NULL
))
6674 hdr
= &elf_section_data (section
)->this_hdr
;
6675 pos
= hdr
->sh_offset
+ offset
;
6676 if (bfd_seek (abfd
, pos
, SEEK_SET
) != 0
6677 || bfd_bwrite (location
, count
, abfd
) != count
)
6684 _bfd_elf_no_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
6685 arelent
*cache_ptr ATTRIBUTE_UNUSED
,
6686 Elf_Internal_Rela
*dst ATTRIBUTE_UNUSED
)
6691 /* Try to convert a non-ELF reloc into an ELF one. */
6694 _bfd_elf_validate_reloc (bfd
*abfd
, arelent
*areloc
)
6696 /* Check whether we really have an ELF howto. */
6698 if ((*areloc
->sym_ptr_ptr
)->the_bfd
->xvec
!= abfd
->xvec
)
6700 bfd_reloc_code_real_type code
;
6701 reloc_howto_type
*howto
;
6703 /* Alien reloc: Try to determine its type to replace it with an
6704 equivalent ELF reloc. */
6706 if (areloc
->howto
->pc_relative
)
6708 switch (areloc
->howto
->bitsize
)
6711 code
= BFD_RELOC_8_PCREL
;
6714 code
= BFD_RELOC_12_PCREL
;
6717 code
= BFD_RELOC_16_PCREL
;
6720 code
= BFD_RELOC_24_PCREL
;
6723 code
= BFD_RELOC_32_PCREL
;
6726 code
= BFD_RELOC_64_PCREL
;
6732 howto
= bfd_reloc_type_lookup (abfd
, code
);
6734 if (areloc
->howto
->pcrel_offset
!= howto
->pcrel_offset
)
6736 if (howto
->pcrel_offset
)
6737 areloc
->addend
+= areloc
->address
;
6739 areloc
->addend
-= areloc
->address
; /* addend is unsigned!! */
6744 switch (areloc
->howto
->bitsize
)
6750 code
= BFD_RELOC_14
;
6753 code
= BFD_RELOC_16
;
6756 code
= BFD_RELOC_26
;
6759 code
= BFD_RELOC_32
;
6762 code
= BFD_RELOC_64
;
6768 howto
= bfd_reloc_type_lookup (abfd
, code
);
6772 areloc
->howto
= howto
;
6780 (*_bfd_error_handler
)
6781 (_("%B: unsupported relocation type %s"),
6782 abfd
, areloc
->howto
->name
);
6783 bfd_set_error (bfd_error_bad_value
);
6788 _bfd_elf_close_and_cleanup (bfd
*abfd
)
6790 if (bfd_get_format (abfd
) == bfd_object
)
6792 if (elf_shstrtab (abfd
) != NULL
)
6793 _bfd_elf_strtab_free (elf_shstrtab (abfd
));
6794 _bfd_dwarf2_cleanup_debug_info (abfd
);
6797 return _bfd_generic_close_and_cleanup (abfd
);
6800 /* For Rel targets, we encode meaningful data for BFD_RELOC_VTABLE_ENTRY
6801 in the relocation's offset. Thus we cannot allow any sort of sanity
6802 range-checking to interfere. There is nothing else to do in processing
6805 bfd_reloc_status_type
6806 _bfd_elf_rel_vtable_reloc_fn
6807 (bfd
*abfd ATTRIBUTE_UNUSED
, arelent
*re ATTRIBUTE_UNUSED
,
6808 struct bfd_symbol
*symbol ATTRIBUTE_UNUSED
,
6809 void *data ATTRIBUTE_UNUSED
, asection
*is ATTRIBUTE_UNUSED
,
6810 bfd
*obfd ATTRIBUTE_UNUSED
, char **errmsg ATTRIBUTE_UNUSED
)
6812 return bfd_reloc_ok
;
6815 /* Elf core file support. Much of this only works on native
6816 toolchains, since we rely on knowing the
6817 machine-dependent procfs structure in order to pick
6818 out details about the corefile. */
6820 #ifdef HAVE_SYS_PROCFS_H
6821 # include <sys/procfs.h>
6824 /* FIXME: this is kinda wrong, but it's what gdb wants. */
6827 elfcore_make_pid (bfd
*abfd
)
6829 return ((elf_tdata (abfd
)->core_lwpid
<< 16)
6830 + (elf_tdata (abfd
)->core_pid
));
6833 /* If there isn't a section called NAME, make one, using
6834 data from SECT. Note, this function will generate a
6835 reference to NAME, so you shouldn't deallocate or
6839 elfcore_maybe_make_sect (bfd
*abfd
, char *name
, asection
*sect
)
6843 if (bfd_get_section_by_name (abfd
, name
) != NULL
)
6846 sect2
= bfd_make_section (abfd
, name
);
6850 sect2
->size
= sect
->size
;
6851 sect2
->filepos
= sect
->filepos
;
6852 sect2
->flags
= sect
->flags
;
6853 sect2
->alignment_power
= sect
->alignment_power
;
6857 /* Create a pseudosection containing SIZE bytes at FILEPOS. This
6858 actually creates up to two pseudosections:
6859 - For the single-threaded case, a section named NAME, unless
6860 such a section already exists.
6861 - For the multi-threaded case, a section named "NAME/PID", where
6862 PID is elfcore_make_pid (abfd).
6863 Both pseudosections have identical contents. */
6865 _bfd_elfcore_make_pseudosection (bfd
*abfd
,
6871 char *threaded_name
;
6875 /* Build the section name. */
6877 sprintf (buf
, "%s/%d", name
, elfcore_make_pid (abfd
));
6878 len
= strlen (buf
) + 1;
6879 threaded_name
= bfd_alloc (abfd
, len
);
6880 if (threaded_name
== NULL
)
6882 memcpy (threaded_name
, buf
, len
);
6884 sect
= bfd_make_section_anyway (abfd
, threaded_name
);
6888 sect
->filepos
= filepos
;
6889 sect
->flags
= SEC_HAS_CONTENTS
;
6890 sect
->alignment_power
= 2;
6892 return elfcore_maybe_make_sect (abfd
, name
, sect
);
6895 /* prstatus_t exists on:
6897 linux 2.[01] + glibc
6901 #if defined (HAVE_PRSTATUS_T)
6904 elfcore_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
6909 if (note
->descsz
== sizeof (prstatus_t
))
6913 size
= sizeof (prstat
.pr_reg
);
6914 offset
= offsetof (prstatus_t
, pr_reg
);
6915 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6917 /* Do not overwrite the core signal if it
6918 has already been set by another thread. */
6919 if (elf_tdata (abfd
)->core_signal
== 0)
6920 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6921 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6923 /* pr_who exists on:
6926 pr_who doesn't exist on:
6929 #if defined (HAVE_PRSTATUS_T_PR_WHO)
6930 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6933 #if defined (HAVE_PRSTATUS32_T)
6934 else if (note
->descsz
== sizeof (prstatus32_t
))
6936 /* 64-bit host, 32-bit corefile */
6937 prstatus32_t prstat
;
6939 size
= sizeof (prstat
.pr_reg
);
6940 offset
= offsetof (prstatus32_t
, pr_reg
);
6941 memcpy (&prstat
, note
->descdata
, sizeof (prstat
));
6943 /* Do not overwrite the core signal if it
6944 has already been set by another thread. */
6945 if (elf_tdata (abfd
)->core_signal
== 0)
6946 elf_tdata (abfd
)->core_signal
= prstat
.pr_cursig
;
6947 elf_tdata (abfd
)->core_pid
= prstat
.pr_pid
;
6949 /* pr_who exists on:
6952 pr_who doesn't exist on:
6955 #if defined (HAVE_PRSTATUS32_T_PR_WHO)
6956 elf_tdata (abfd
)->core_lwpid
= prstat
.pr_who
;
6959 #endif /* HAVE_PRSTATUS32_T */
6962 /* Fail - we don't know how to handle any other
6963 note size (ie. data object type). */
6967 /* Make a ".reg/999" section and a ".reg" section. */
6968 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
6969 size
, note
->descpos
+ offset
);
6971 #endif /* defined (HAVE_PRSTATUS_T) */
6973 /* Create a pseudosection containing the exact contents of NOTE. */
6975 elfcore_make_note_pseudosection (bfd
*abfd
,
6977 Elf_Internal_Note
*note
)
6979 return _bfd_elfcore_make_pseudosection (abfd
, name
,
6980 note
->descsz
, note
->descpos
);
6983 /* There isn't a consistent prfpregset_t across platforms,
6984 but it doesn't matter, because we don't have to pick this
6985 data structure apart. */
6988 elfcore_grok_prfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
6990 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
6993 /* Linux dumps the Intel SSE regs in a note named "LINUX" with a note
6994 type of 5 (NT_PRXFPREG). Just include the whole note's contents
6998 elfcore_grok_prxfpreg (bfd
*abfd
, Elf_Internal_Note
*note
)
7000 return elfcore_make_note_pseudosection (abfd
, ".reg-xfp", note
);
7003 #if defined (HAVE_PRPSINFO_T)
7004 typedef prpsinfo_t elfcore_psinfo_t
;
7005 #if defined (HAVE_PRPSINFO32_T) /* Sparc64 cross Sparc32 */
7006 typedef prpsinfo32_t elfcore_psinfo32_t
;
7010 #if defined (HAVE_PSINFO_T)
7011 typedef psinfo_t elfcore_psinfo_t
;
7012 #if defined (HAVE_PSINFO32_T) /* Sparc64 cross Sparc32 */
7013 typedef psinfo32_t elfcore_psinfo32_t
;
7017 /* return a malloc'ed copy of a string at START which is at
7018 most MAX bytes long, possibly without a terminating '\0'.
7019 the copy will always have a terminating '\0'. */
7022 _bfd_elfcore_strndup (bfd
*abfd
, char *start
, size_t max
)
7025 char *end
= memchr (start
, '\0', max
);
7033 dups
= bfd_alloc (abfd
, len
+ 1);
7037 memcpy (dups
, start
, len
);
7043 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7045 elfcore_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7047 if (note
->descsz
== sizeof (elfcore_psinfo_t
))
7049 elfcore_psinfo_t psinfo
;
7051 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7053 elf_tdata (abfd
)->core_program
7054 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7055 sizeof (psinfo
.pr_fname
));
7057 elf_tdata (abfd
)->core_command
7058 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7059 sizeof (psinfo
.pr_psargs
));
7061 #if defined (HAVE_PRPSINFO32_T) || defined (HAVE_PSINFO32_T)
7062 else if (note
->descsz
== sizeof (elfcore_psinfo32_t
))
7064 /* 64-bit host, 32-bit corefile */
7065 elfcore_psinfo32_t psinfo
;
7067 memcpy (&psinfo
, note
->descdata
, sizeof (psinfo
));
7069 elf_tdata (abfd
)->core_program
7070 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_fname
,
7071 sizeof (psinfo
.pr_fname
));
7073 elf_tdata (abfd
)->core_command
7074 = _bfd_elfcore_strndup (abfd
, psinfo
.pr_psargs
,
7075 sizeof (psinfo
.pr_psargs
));
7081 /* Fail - we don't know how to handle any other
7082 note size (ie. data object type). */
7086 /* Note that for some reason, a spurious space is tacked
7087 onto the end of the args in some (at least one anyway)
7088 implementations, so strip it off if it exists. */
7091 char *command
= elf_tdata (abfd
)->core_command
;
7092 int n
= strlen (command
);
7094 if (0 < n
&& command
[n
- 1] == ' ')
7095 command
[n
- 1] = '\0';
7100 #endif /* defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T) */
7102 #if defined (HAVE_PSTATUS_T)
7104 elfcore_grok_pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7106 if (note
->descsz
== sizeof (pstatus_t
)
7107 #if defined (HAVE_PXSTATUS_T)
7108 || note
->descsz
== sizeof (pxstatus_t
)
7114 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7116 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7118 #if defined (HAVE_PSTATUS32_T)
7119 else if (note
->descsz
== sizeof (pstatus32_t
))
7121 /* 64-bit host, 32-bit corefile */
7124 memcpy (&pstat
, note
->descdata
, sizeof (pstat
));
7126 elf_tdata (abfd
)->core_pid
= pstat
.pr_pid
;
7129 /* Could grab some more details from the "representative"
7130 lwpstatus_t in pstat.pr_lwp, but we'll catch it all in an
7131 NT_LWPSTATUS note, presumably. */
7135 #endif /* defined (HAVE_PSTATUS_T) */
7137 #if defined (HAVE_LWPSTATUS_T)
7139 elfcore_grok_lwpstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7141 lwpstatus_t lwpstat
;
7147 if (note
->descsz
!= sizeof (lwpstat
)
7148 #if defined (HAVE_LWPXSTATUS_T)
7149 && note
->descsz
!= sizeof (lwpxstatus_t
)
7154 memcpy (&lwpstat
, note
->descdata
, sizeof (lwpstat
));
7156 elf_tdata (abfd
)->core_lwpid
= lwpstat
.pr_lwpid
;
7157 elf_tdata (abfd
)->core_signal
= lwpstat
.pr_cursig
;
7159 /* Make a ".reg/999" section. */
7161 sprintf (buf
, ".reg/%d", elfcore_make_pid (abfd
));
7162 len
= strlen (buf
) + 1;
7163 name
= bfd_alloc (abfd
, len
);
7166 memcpy (name
, buf
, len
);
7168 sect
= bfd_make_section_anyway (abfd
, name
);
7172 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7173 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
);
7174 sect
->filepos
= note
->descpos
7175 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.gregs
);
7178 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7179 sect
->size
= sizeof (lwpstat
.pr_reg
);
7180 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_reg
);
7183 sect
->flags
= SEC_HAS_CONTENTS
;
7184 sect
->alignment_power
= 2;
7186 if (!elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7189 /* Make a ".reg2/999" section */
7191 sprintf (buf
, ".reg2/%d", elfcore_make_pid (abfd
));
7192 len
= strlen (buf
) + 1;
7193 name
= bfd_alloc (abfd
, len
);
7196 memcpy (name
, buf
, len
);
7198 sect
= bfd_make_section_anyway (abfd
, name
);
7202 #if defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7203 sect
->size
= sizeof (lwpstat
.pr_context
.uc_mcontext
.fpregs
);
7204 sect
->filepos
= note
->descpos
7205 + offsetof (lwpstatus_t
, pr_context
.uc_mcontext
.fpregs
);
7208 #if defined (HAVE_LWPSTATUS_T_PR_FPREG)
7209 sect
->size
= sizeof (lwpstat
.pr_fpreg
);
7210 sect
->filepos
= note
->descpos
+ offsetof (lwpstatus_t
, pr_fpreg
);
7213 sect
->flags
= SEC_HAS_CONTENTS
;
7214 sect
->alignment_power
= 2;
7216 return elfcore_maybe_make_sect (abfd
, ".reg2", sect
);
7218 #endif /* defined (HAVE_LWPSTATUS_T) */
7220 #if defined (HAVE_WIN32_PSTATUS_T)
7222 elfcore_grok_win32pstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
7228 win32_pstatus_t pstatus
;
7230 if (note
->descsz
< sizeof (pstatus
))
7233 memcpy (&pstatus
, note
->descdata
, sizeof (pstatus
));
7235 switch (pstatus
.data_type
)
7237 case NOTE_INFO_PROCESS
:
7238 /* FIXME: need to add ->core_command. */
7239 elf_tdata (abfd
)->core_signal
= pstatus
.data
.process_info
.signal
;
7240 elf_tdata (abfd
)->core_pid
= pstatus
.data
.process_info
.pid
;
7243 case NOTE_INFO_THREAD
:
7244 /* Make a ".reg/999" section. */
7245 sprintf (buf
, ".reg/%ld", (long) pstatus
.data
.thread_info
.tid
);
7247 len
= strlen (buf
) + 1;
7248 name
= bfd_alloc (abfd
, len
);
7252 memcpy (name
, buf
, len
);
7254 sect
= bfd_make_section_anyway (abfd
, name
);
7258 sect
->size
= sizeof (pstatus
.data
.thread_info
.thread_context
);
7259 sect
->filepos
= (note
->descpos
7260 + offsetof (struct win32_pstatus
,
7261 data
.thread_info
.thread_context
));
7262 sect
->flags
= SEC_HAS_CONTENTS
;
7263 sect
->alignment_power
= 2;
7265 if (pstatus
.data
.thread_info
.is_active_thread
)
7266 if (! elfcore_maybe_make_sect (abfd
, ".reg", sect
))
7270 case NOTE_INFO_MODULE
:
7271 /* Make a ".module/xxxxxxxx" section. */
7272 sprintf (buf
, ".module/%08lx",
7273 (long) pstatus
.data
.module_info
.base_address
);
7275 len
= strlen (buf
) + 1;
7276 name
= bfd_alloc (abfd
, len
);
7280 memcpy (name
, buf
, len
);
7282 sect
= bfd_make_section_anyway (abfd
, name
);
7287 sect
->size
= note
->descsz
;
7288 sect
->filepos
= note
->descpos
;
7289 sect
->flags
= SEC_HAS_CONTENTS
;
7290 sect
->alignment_power
= 2;
7299 #endif /* HAVE_WIN32_PSTATUS_T */
7302 elfcore_grok_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7304 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7312 if (bed
->elf_backend_grok_prstatus
)
7313 if ((*bed
->elf_backend_grok_prstatus
) (abfd
, note
))
7315 #if defined (HAVE_PRSTATUS_T)
7316 return elfcore_grok_prstatus (abfd
, note
);
7321 #if defined (HAVE_PSTATUS_T)
7323 return elfcore_grok_pstatus (abfd
, note
);
7326 #if defined (HAVE_LWPSTATUS_T)
7328 return elfcore_grok_lwpstatus (abfd
, note
);
7331 case NT_FPREGSET
: /* FIXME: rename to NT_PRFPREG */
7332 return elfcore_grok_prfpreg (abfd
, note
);
7334 #if defined (HAVE_WIN32_PSTATUS_T)
7335 case NT_WIN32PSTATUS
:
7336 return elfcore_grok_win32pstatus (abfd
, note
);
7339 case NT_PRXFPREG
: /* Linux SSE extension */
7340 if (note
->namesz
== 6
7341 && strcmp (note
->namedata
, "LINUX") == 0)
7342 return elfcore_grok_prxfpreg (abfd
, note
);
7348 if (bed
->elf_backend_grok_psinfo
)
7349 if ((*bed
->elf_backend_grok_psinfo
) (abfd
, note
))
7351 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7352 return elfcore_grok_psinfo (abfd
, note
);
7359 asection
*sect
= bfd_make_section_anyway (abfd
, ".auxv");
7363 sect
->size
= note
->descsz
;
7364 sect
->filepos
= note
->descpos
;
7365 sect
->flags
= SEC_HAS_CONTENTS
;
7366 sect
->alignment_power
= 1 + bfd_get_arch_size (abfd
) / 32;
7374 elfcore_netbsd_get_lwpid (Elf_Internal_Note
*note
, int *lwpidp
)
7378 cp
= strchr (note
->namedata
, '@');
7381 *lwpidp
= atoi(cp
+ 1);
7388 elfcore_grok_netbsd_procinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
7391 /* Signal number at offset 0x08. */
7392 elf_tdata (abfd
)->core_signal
7393 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x08);
7395 /* Process ID at offset 0x50. */
7396 elf_tdata (abfd
)->core_pid
7397 = bfd_h_get_32 (abfd
, (bfd_byte
*) note
->descdata
+ 0x50);
7399 /* Command name at 0x7c (max 32 bytes, including nul). */
7400 elf_tdata (abfd
)->core_command
7401 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 0x7c, 31);
7403 return elfcore_make_note_pseudosection (abfd
, ".note.netbsdcore.procinfo",
7408 elfcore_grok_netbsd_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7412 if (elfcore_netbsd_get_lwpid (note
, &lwp
))
7413 elf_tdata (abfd
)->core_lwpid
= lwp
;
7415 if (note
->type
== NT_NETBSDCORE_PROCINFO
)
7417 /* NetBSD-specific core "procinfo". Note that we expect to
7418 find this note before any of the others, which is fine,
7419 since the kernel writes this note out first when it
7420 creates a core file. */
7422 return elfcore_grok_netbsd_procinfo (abfd
, note
);
7425 /* As of Jan 2002 there are no other machine-independent notes
7426 defined for NetBSD core files. If the note type is less
7427 than the start of the machine-dependent note types, we don't
7430 if (note
->type
< NT_NETBSDCORE_FIRSTMACH
)
7434 switch (bfd_get_arch (abfd
))
7436 /* On the Alpha, SPARC (32-bit and 64-bit), PT_GETREGS == mach+0 and
7437 PT_GETFPREGS == mach+2. */
7439 case bfd_arch_alpha
:
7440 case bfd_arch_sparc
:
7443 case NT_NETBSDCORE_FIRSTMACH
+0:
7444 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7446 case NT_NETBSDCORE_FIRSTMACH
+2:
7447 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7453 /* On all other arch's, PT_GETREGS == mach+1 and
7454 PT_GETFPREGS == mach+3. */
7459 case NT_NETBSDCORE_FIRSTMACH
+1:
7460 return elfcore_make_note_pseudosection (abfd
, ".reg", note
);
7462 case NT_NETBSDCORE_FIRSTMACH
+3:
7463 return elfcore_make_note_pseudosection (abfd
, ".reg2", note
);
7473 elfcore_grok_nto_status (bfd
*abfd
, Elf_Internal_Note
*note
, pid_t
*tid
)
7475 void *ddata
= note
->descdata
;
7482 /* nto_procfs_status 'pid' field is at offset 0. */
7483 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
);
7485 /* nto_procfs_status 'tid' field is at offset 4. Pass it back. */
7486 *tid
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 4);
7488 /* nto_procfs_status 'flags' field is at offset 8. */
7489 flags
= bfd_get_32 (abfd
, (bfd_byte
*) ddata
+ 8);
7491 /* nto_procfs_status 'what' field is at offset 14. */
7492 if ((sig
= bfd_get_16 (abfd
, (bfd_byte
*) ddata
+ 14)) > 0)
7494 elf_tdata (abfd
)->core_signal
= sig
;
7495 elf_tdata (abfd
)->core_lwpid
= *tid
;
7498 /* _DEBUG_FLAG_CURTID (current thread) is 0x80. Some cores
7499 do not come from signals so we make sure we set the current
7500 thread just in case. */
7501 if (flags
& 0x00000080)
7502 elf_tdata (abfd
)->core_lwpid
= *tid
;
7504 /* Make a ".qnx_core_status/%d" section. */
7505 sprintf (buf
, ".qnx_core_status/%ld", (long) *tid
);
7507 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7512 sect
= bfd_make_section_anyway (abfd
, name
);
7516 sect
->size
= note
->descsz
;
7517 sect
->filepos
= note
->descpos
;
7518 sect
->flags
= SEC_HAS_CONTENTS
;
7519 sect
->alignment_power
= 2;
7521 return (elfcore_maybe_make_sect (abfd
, ".qnx_core_status", sect
));
7525 elfcore_grok_nto_regs (bfd
*abfd
,
7526 Elf_Internal_Note
*note
,
7534 /* Make a "(base)/%d" section. */
7535 sprintf (buf
, "%s/%ld", base
, (long) tid
);
7537 name
= bfd_alloc (abfd
, strlen (buf
) + 1);
7542 sect
= bfd_make_section_anyway (abfd
, name
);
7546 sect
->size
= note
->descsz
;
7547 sect
->filepos
= note
->descpos
;
7548 sect
->flags
= SEC_HAS_CONTENTS
;
7549 sect
->alignment_power
= 2;
7551 /* This is the current thread. */
7552 if (elf_tdata (abfd
)->core_lwpid
== tid
)
7553 return elfcore_maybe_make_sect (abfd
, base
, sect
);
7558 #define BFD_QNT_CORE_INFO 7
7559 #define BFD_QNT_CORE_STATUS 8
7560 #define BFD_QNT_CORE_GREG 9
7561 #define BFD_QNT_CORE_FPREG 10
7564 elfcore_grok_nto_note (bfd
*abfd
, Elf_Internal_Note
*note
)
7566 /* Every GREG section has a STATUS section before it. Store the
7567 tid from the previous call to pass down to the next gregs
7569 static pid_t tid
= 1;
7573 case BFD_QNT_CORE_INFO
:
7574 return elfcore_make_note_pseudosection (abfd
, ".qnx_core_info", note
);
7575 case BFD_QNT_CORE_STATUS
:
7576 return elfcore_grok_nto_status (abfd
, note
, &tid
);
7577 case BFD_QNT_CORE_GREG
:
7578 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg");
7579 case BFD_QNT_CORE_FPREG
:
7580 return elfcore_grok_nto_regs (abfd
, note
, tid
, ".reg2");
7586 /* Function: elfcore_write_note
7593 size of data for note
7596 End of buffer containing note. */
7599 elfcore_write_note (bfd
*abfd
,
7607 Elf_External_Note
*xnp
;
7617 const struct elf_backend_data
*bed
;
7619 namesz
= strlen (name
) + 1;
7620 bed
= get_elf_backend_data (abfd
);
7621 pad
= -namesz
& ((1 << bed
->s
->log_file_align
) - 1);
7624 newspace
= 12 + namesz
+ pad
+ size
;
7626 p
= realloc (buf
, *bufsiz
+ newspace
);
7628 *bufsiz
+= newspace
;
7629 xnp
= (Elf_External_Note
*) dest
;
7630 H_PUT_32 (abfd
, namesz
, xnp
->namesz
);
7631 H_PUT_32 (abfd
, size
, xnp
->descsz
);
7632 H_PUT_32 (abfd
, type
, xnp
->type
);
7636 memcpy (dest
, name
, namesz
);
7644 memcpy (dest
, input
, size
);
7648 #if defined (HAVE_PRPSINFO_T) || defined (HAVE_PSINFO_T)
7650 elfcore_write_prpsinfo (bfd
*abfd
,
7657 char *note_name
= "CORE";
7659 #if defined (HAVE_PSINFO_T)
7661 note_type
= NT_PSINFO
;
7664 note_type
= NT_PRPSINFO
;
7667 memset (&data
, 0, sizeof (data
));
7668 strncpy (data
.pr_fname
, fname
, sizeof (data
.pr_fname
));
7669 strncpy (data
.pr_psargs
, psargs
, sizeof (data
.pr_psargs
));
7670 return elfcore_write_note (abfd
, buf
, bufsiz
,
7671 note_name
, note_type
, &data
, sizeof (data
));
7673 #endif /* PSINFO_T or PRPSINFO_T */
7675 #if defined (HAVE_PRSTATUS_T)
7677 elfcore_write_prstatus (bfd
*abfd
,
7685 char *note_name
= "CORE";
7687 memset (&prstat
, 0, sizeof (prstat
));
7688 prstat
.pr_pid
= pid
;
7689 prstat
.pr_cursig
= cursig
;
7690 memcpy (&prstat
.pr_reg
, gregs
, sizeof (prstat
.pr_reg
));
7691 return elfcore_write_note (abfd
, buf
, bufsiz
,
7692 note_name
, NT_PRSTATUS
, &prstat
, sizeof (prstat
));
7694 #endif /* HAVE_PRSTATUS_T */
7696 #if defined (HAVE_LWPSTATUS_T)
7698 elfcore_write_lwpstatus (bfd
*abfd
,
7705 lwpstatus_t lwpstat
;
7706 char *note_name
= "CORE";
7708 memset (&lwpstat
, 0, sizeof (lwpstat
));
7709 lwpstat
.pr_lwpid
= pid
>> 16;
7710 lwpstat
.pr_cursig
= cursig
;
7711 #if defined (HAVE_LWPSTATUS_T_PR_REG)
7712 memcpy (lwpstat
.pr_reg
, gregs
, sizeof (lwpstat
.pr_reg
));
7713 #elif defined (HAVE_LWPSTATUS_T_PR_CONTEXT)
7715 memcpy (lwpstat
.pr_context
.uc_mcontext
.gregs
,
7716 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.gregs
));
7718 memcpy (lwpstat
.pr_context
.uc_mcontext
.__gregs
,
7719 gregs
, sizeof (lwpstat
.pr_context
.uc_mcontext
.__gregs
));
7722 return elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7723 NT_LWPSTATUS
, &lwpstat
, sizeof (lwpstat
));
7725 #endif /* HAVE_LWPSTATUS_T */
7727 #if defined (HAVE_PSTATUS_T)
7729 elfcore_write_pstatus (bfd
*abfd
,
7737 char *note_name
= "CORE";
7739 memset (&pstat
, 0, sizeof (pstat
));
7740 pstat
.pr_pid
= pid
& 0xffff;
7741 buf
= elfcore_write_note (abfd
, buf
, bufsiz
, note_name
,
7742 NT_PSTATUS
, &pstat
, sizeof (pstat
));
7745 #endif /* HAVE_PSTATUS_T */
7748 elfcore_write_prfpreg (bfd
*abfd
,
7754 char *note_name
= "CORE";
7755 return elfcore_write_note (abfd
, buf
, bufsiz
,
7756 note_name
, NT_FPREGSET
, fpregs
, size
);
7760 elfcore_write_prxfpreg (bfd
*abfd
,
7763 const void *xfpregs
,
7766 char *note_name
= "LINUX";
7767 return elfcore_write_note (abfd
, buf
, bufsiz
,
7768 note_name
, NT_PRXFPREG
, xfpregs
, size
);
7772 elfcore_read_notes (bfd
*abfd
, file_ptr offset
, bfd_size_type size
)
7780 if (bfd_seek (abfd
, offset
, SEEK_SET
) != 0)
7783 buf
= bfd_malloc (size
);
7787 if (bfd_bread (buf
, size
, abfd
) != size
)
7795 while (p
< buf
+ size
)
7797 /* FIXME: bad alignment assumption. */
7798 Elf_External_Note
*xnp
= (Elf_External_Note
*) p
;
7799 Elf_Internal_Note in
;
7801 in
.type
= H_GET_32 (abfd
, xnp
->type
);
7803 in
.namesz
= H_GET_32 (abfd
, xnp
->namesz
);
7804 in
.namedata
= xnp
->name
;
7806 in
.descsz
= H_GET_32 (abfd
, xnp
->descsz
);
7807 in
.descdata
= in
.namedata
+ BFD_ALIGN (in
.namesz
, 4);
7808 in
.descpos
= offset
+ (in
.descdata
- buf
);
7810 if (strncmp (in
.namedata
, "NetBSD-CORE", 11) == 0)
7812 if (! elfcore_grok_netbsd_note (abfd
, &in
))
7815 else if (strncmp (in
.namedata
, "QNX", 3) == 0)
7817 if (! elfcore_grok_nto_note (abfd
, &in
))
7822 if (! elfcore_grok_note (abfd
, &in
))
7826 p
= in
.descdata
+ BFD_ALIGN (in
.descsz
, 4);
7833 /* Providing external access to the ELF program header table. */
7835 /* Return an upper bound on the number of bytes required to store a
7836 copy of ABFD's program header table entries. Return -1 if an error
7837 occurs; bfd_get_error will return an appropriate code. */
7840 bfd_get_elf_phdr_upper_bound (bfd
*abfd
)
7842 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7844 bfd_set_error (bfd_error_wrong_format
);
7848 return elf_elfheader (abfd
)->e_phnum
* sizeof (Elf_Internal_Phdr
);
7851 /* Copy ABFD's program header table entries to *PHDRS. The entries
7852 will be stored as an array of Elf_Internal_Phdr structures, as
7853 defined in include/elf/internal.h. To find out how large the
7854 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
7856 Return the number of program header table entries read, or -1 if an
7857 error occurs; bfd_get_error will return an appropriate code. */
7860 bfd_get_elf_phdrs (bfd
*abfd
, void *phdrs
)
7864 if (abfd
->xvec
->flavour
!= bfd_target_elf_flavour
)
7866 bfd_set_error (bfd_error_wrong_format
);
7870 num_phdrs
= elf_elfheader (abfd
)->e_phnum
;
7871 memcpy (phdrs
, elf_tdata (abfd
)->phdr
,
7872 num_phdrs
* sizeof (Elf_Internal_Phdr
));
7878 _bfd_elf_sprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, char *buf
, bfd_vma value
)
7881 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7883 i_ehdrp
= elf_elfheader (abfd
);
7884 if (i_ehdrp
== NULL
)
7885 sprintf_vma (buf
, value
);
7888 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7890 #if BFD_HOST_64BIT_LONG
7891 sprintf (buf
, "%016lx", value
);
7893 sprintf (buf
, "%08lx%08lx", _bfd_int64_high (value
),
7894 _bfd_int64_low (value
));
7898 sprintf (buf
, "%08lx", (unsigned long) (value
& 0xffffffff));
7901 sprintf_vma (buf
, value
);
7906 _bfd_elf_fprintf_vma (bfd
*abfd ATTRIBUTE_UNUSED
, void *stream
, bfd_vma value
)
7909 Elf_Internal_Ehdr
*i_ehdrp
; /* Elf file header, internal form */
7911 i_ehdrp
= elf_elfheader (abfd
);
7912 if (i_ehdrp
== NULL
)
7913 fprintf_vma ((FILE *) stream
, value
);
7916 if (i_ehdrp
->e_ident
[EI_CLASS
] == ELFCLASS64
)
7918 #if BFD_HOST_64BIT_LONG
7919 fprintf ((FILE *) stream
, "%016lx", value
);
7921 fprintf ((FILE *) stream
, "%08lx%08lx",
7922 _bfd_int64_high (value
), _bfd_int64_low (value
));
7926 fprintf ((FILE *) stream
, "%08lx",
7927 (unsigned long) (value
& 0xffffffff));
7930 fprintf_vma ((FILE *) stream
, value
);
7934 enum elf_reloc_type_class
7935 _bfd_elf_reloc_type_class (const Elf_Internal_Rela
*rela ATTRIBUTE_UNUSED
)
7937 return reloc_class_normal
;
7940 /* For RELA architectures, return the relocation value for a
7941 relocation against a local symbol. */
7944 _bfd_elf_rela_local_sym (bfd
*abfd
,
7945 Elf_Internal_Sym
*sym
,
7947 Elf_Internal_Rela
*rel
)
7949 asection
*sec
= *psec
;
7952 relocation
= (sec
->output_section
->vma
7953 + sec
->output_offset
7955 if ((sec
->flags
& SEC_MERGE
)
7956 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
7957 && sec
->sec_info_type
== ELF_INFO_TYPE_MERGE
)
7960 _bfd_merged_section_offset (abfd
, psec
,
7961 elf_section_data (sec
)->sec_info
,
7962 sym
->st_value
+ rel
->r_addend
);
7965 /* If we have changed the section, and our original section is
7966 marked with SEC_EXCLUDE, it means that the original
7967 SEC_MERGE section has been completely subsumed in some
7968 other SEC_MERGE section. In this case, we need to leave
7969 some info around for --emit-relocs. */
7970 if ((sec
->flags
& SEC_EXCLUDE
) != 0)
7971 sec
->kept_section
= *psec
;
7974 rel
->r_addend
-= relocation
;
7975 rel
->r_addend
+= sec
->output_section
->vma
+ sec
->output_offset
;
7981 _bfd_elf_rel_local_sym (bfd
*abfd
,
7982 Elf_Internal_Sym
*sym
,
7986 asection
*sec
= *psec
;
7988 if (sec
->sec_info_type
!= ELF_INFO_TYPE_MERGE
)
7989 return sym
->st_value
+ addend
;
7991 return _bfd_merged_section_offset (abfd
, psec
,
7992 elf_section_data (sec
)->sec_info
,
7993 sym
->st_value
+ addend
);
7997 _bfd_elf_section_offset (bfd
*abfd
,
7998 struct bfd_link_info
*info
,
8002 switch (sec
->sec_info_type
)
8004 case ELF_INFO_TYPE_STABS
:
8005 return _bfd_stab_section_offset (sec
, elf_section_data (sec
)->sec_info
,
8007 case ELF_INFO_TYPE_EH_FRAME
:
8008 return _bfd_elf_eh_frame_section_offset (abfd
, info
, sec
, offset
);
8014 /* Create a new BFD as if by bfd_openr. Rather than opening a file,
8015 reconstruct an ELF file by reading the segments out of remote memory
8016 based on the ELF file header at EHDR_VMA and the ELF program headers it
8017 points to. If not null, *LOADBASEP is filled in with the difference
8018 between the VMAs from which the segments were read, and the VMAs the
8019 file headers (and hence BFD's idea of each section's VMA) put them at.
8021 The function TARGET_READ_MEMORY is called to copy LEN bytes from the
8022 remote memory at target address VMA into the local buffer at MYADDR; it
8023 should return zero on success or an `errno' code on failure. TEMPL must
8024 be a BFD for an ELF target with the word size and byte order found in
8025 the remote memory. */
8028 bfd_elf_bfd_from_remote_memory
8032 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, int))
8034 return (*get_elf_backend_data (templ
)->elf_backend_bfd_from_remote_memory
)
8035 (templ
, ehdr_vma
, loadbasep
, target_read_memory
);
8039 _bfd_elf_get_synthetic_symtab (bfd
*abfd
,
8040 long symcount ATTRIBUTE_UNUSED
,
8041 asymbol
**syms ATTRIBUTE_UNUSED
,
8046 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
8049 const char *relplt_name
;
8050 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
8054 Elf_Internal_Shdr
*hdr
;
8060 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
8063 if (dynsymcount
<= 0)
8066 if (!bed
->plt_sym_val
)
8069 relplt_name
= bed
->relplt_name
;
8070 if (relplt_name
== NULL
)
8071 relplt_name
= bed
->default_use_rela_p
? ".rela.plt" : ".rel.plt";
8072 relplt
= bfd_get_section_by_name (abfd
, relplt_name
);
8076 hdr
= &elf_section_data (relplt
)->this_hdr
;
8077 if (hdr
->sh_link
!= elf_dynsymtab (abfd
)
8078 || (hdr
->sh_type
!= SHT_REL
&& hdr
->sh_type
!= SHT_RELA
))
8081 plt
= bfd_get_section_by_name (abfd
, ".plt");
8085 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
8086 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
8089 count
= relplt
->size
/ hdr
->sh_entsize
;
8090 size
= count
* sizeof (asymbol
);
8091 p
= relplt
->relocation
;
8092 for (i
= 0; i
< count
; i
++, s
++, p
++)
8093 size
+= strlen ((*p
->sym_ptr_ptr
)->name
) + sizeof ("@plt");
8095 s
= *ret
= bfd_malloc (size
);
8099 names
= (char *) (s
+ count
);
8100 p
= relplt
->relocation
;
8102 for (i
= 0; i
< count
; i
++, s
++, p
++)
8107 addr
= bed
->plt_sym_val (i
, plt
, p
);
8108 if (addr
== (bfd_vma
) -1)
8111 *s
= **p
->sym_ptr_ptr
;
8113 s
->value
= addr
- plt
->vma
;
8115 len
= strlen ((*p
->sym_ptr_ptr
)->name
);
8116 memcpy (names
, (*p
->sym_ptr_ptr
)->name
, len
);
8118 memcpy (names
, "@plt", sizeof ("@plt"));
8119 names
+= sizeof ("@plt");
8126 /* Sort symbol by binding and section. We want to put definitions
8127 sorted by section at the beginning. */
8130 elf_sort_elf_symbol (const void *arg1
, const void *arg2
)
8132 const Elf_Internal_Sym
*s1
;
8133 const Elf_Internal_Sym
*s2
;
8136 /* Make sure that undefined symbols are at the end. */
8137 s1
= (const Elf_Internal_Sym
*) arg1
;
8138 if (s1
->st_shndx
== SHN_UNDEF
)
8140 s2
= (const Elf_Internal_Sym
*) arg2
;
8141 if (s2
->st_shndx
== SHN_UNDEF
)
8144 /* Sorted by section index. */
8145 shndx
= s1
->st_shndx
- s2
->st_shndx
;
8149 /* Sorted by binding. */
8150 return ELF_ST_BIND (s1
->st_info
) - ELF_ST_BIND (s2
->st_info
);
8155 Elf_Internal_Sym
*sym
;
8160 elf_sym_name_compare (const void *arg1
, const void *arg2
)
8162 const struct elf_symbol
*s1
= (const struct elf_symbol
*) arg1
;
8163 const struct elf_symbol
*s2
= (const struct elf_symbol
*) arg2
;
8164 return strcmp (s1
->name
, s2
->name
);
8167 /* Check if 2 sections define the same set of local and global
8171 bfd_elf_match_symbols_in_sections (asection
*sec1
, asection
*sec2
)
8174 const struct elf_backend_data
*bed1
, *bed2
;
8175 Elf_Internal_Shdr
*hdr1
, *hdr2
;
8176 bfd_size_type symcount1
, symcount2
;
8177 Elf_Internal_Sym
*isymbuf1
, *isymbuf2
;
8178 Elf_Internal_Sym
*isymstart1
= NULL
, *isymstart2
= NULL
, *isym
;
8179 Elf_Internal_Sym
*isymend
;
8180 struct elf_symbol
*symp
, *symtable1
= NULL
, *symtable2
= NULL
;
8181 bfd_size_type count1
, count2
, i
;
8188 /* If both are .gnu.linkonce sections, they have to have the same
8190 if (strncmp (sec1
->name
, ".gnu.linkonce",
8191 sizeof ".gnu.linkonce" - 1) == 0
8192 && strncmp (sec2
->name
, ".gnu.linkonce",
8193 sizeof ".gnu.linkonce" - 1) == 0)
8194 return strcmp (sec1
->name
+ sizeof ".gnu.linkonce",
8195 sec2
->name
+ sizeof ".gnu.linkonce") == 0;
8197 /* Both sections have to be in ELF. */
8198 if (bfd_get_flavour (bfd1
) != bfd_target_elf_flavour
8199 || bfd_get_flavour (bfd2
) != bfd_target_elf_flavour
)
8202 if (elf_section_type (sec1
) != elf_section_type (sec2
))
8205 if ((elf_section_flags (sec1
) & SHF_GROUP
) != 0
8206 && (elf_section_flags (sec2
) & SHF_GROUP
) != 0)
8208 /* If both are members of section groups, they have to have the
8210 if (strcmp (elf_group_name (sec1
), elf_group_name (sec2
)) != 0)
8214 shndx1
= _bfd_elf_section_from_bfd_section (bfd1
, sec1
);
8215 shndx2
= _bfd_elf_section_from_bfd_section (bfd2
, sec2
);
8216 if (shndx1
== -1 || shndx2
== -1)
8219 bed1
= get_elf_backend_data (bfd1
);
8220 bed2
= get_elf_backend_data (bfd2
);
8221 hdr1
= &elf_tdata (bfd1
)->symtab_hdr
;
8222 symcount1
= hdr1
->sh_size
/ bed1
->s
->sizeof_sym
;
8223 hdr2
= &elf_tdata (bfd2
)->symtab_hdr
;
8224 symcount2
= hdr2
->sh_size
/ bed2
->s
->sizeof_sym
;
8226 if (symcount1
== 0 || symcount2
== 0)
8229 isymbuf1
= bfd_elf_get_elf_syms (bfd1
, hdr1
, symcount1
, 0,
8231 isymbuf2
= bfd_elf_get_elf_syms (bfd2
, hdr2
, symcount2
, 0,
8235 if (isymbuf1
== NULL
|| isymbuf2
== NULL
)
8238 /* Sort symbols by binding and section. Global definitions are at
8240 qsort (isymbuf1
, symcount1
, sizeof (Elf_Internal_Sym
),
8241 elf_sort_elf_symbol
);
8242 qsort (isymbuf2
, symcount2
, sizeof (Elf_Internal_Sym
),
8243 elf_sort_elf_symbol
);
8245 /* Count definitions in the section. */
8247 for (isym
= isymbuf1
, isymend
= isym
+ symcount1
;
8248 isym
< isymend
; isym
++)
8250 if (isym
->st_shndx
== (unsigned int) shndx1
)
8257 if (count1
&& isym
->st_shndx
!= (unsigned int) shndx1
)
8262 for (isym
= isymbuf2
, isymend
= isym
+ symcount2
;
8263 isym
< isymend
; isym
++)
8265 if (isym
->st_shndx
== (unsigned int) shndx2
)
8272 if (count2
&& isym
->st_shndx
!= (unsigned int) shndx2
)
8276 if (count1
== 0 || count2
== 0 || count1
!= count2
)
8279 symtable1
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8280 symtable2
= bfd_malloc (count1
* sizeof (struct elf_symbol
));
8282 if (symtable1
== NULL
|| symtable2
== NULL
)
8286 for (isym
= isymstart1
, isymend
= isym
+ count1
;
8287 isym
< isymend
; isym
++)
8290 symp
->name
= bfd_elf_string_from_elf_section (bfd1
,
8297 for (isym
= isymstart2
, isymend
= isym
+ count1
;
8298 isym
< isymend
; isym
++)
8301 symp
->name
= bfd_elf_string_from_elf_section (bfd2
,
8307 /* Sort symbol by name. */
8308 qsort (symtable1
, count1
, sizeof (struct elf_symbol
),
8309 elf_sym_name_compare
);
8310 qsort (symtable2
, count1
, sizeof (struct elf_symbol
),
8311 elf_sym_name_compare
);
8313 for (i
= 0; i
< count1
; i
++)
8314 /* Two symbols must have the same binding, type and name. */
8315 if (symtable1
[i
].sym
->st_info
!= symtable2
[i
].sym
->st_info
8316 || symtable1
[i
].sym
->st_other
!= symtable2
[i
].sym
->st_other
8317 || strcmp (symtable1
[i
].name
, symtable2
[i
].name
) != 0)